diff options
Diffstat (limited to 'drivers/iommu')
39 files changed, 12704 insertions, 2246 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index e39f9dbf297..d260605e6d5 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -17,6 +17,16 @@ config OF_IOMMU def_bool y depends on OF +config FSL_PAMU + bool "Freescale IOMMU support" + depends on PPC_E500MC + select IOMMU_API + select GENERIC_ALLOCATOR + help + Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms. + PAMU can authorize memory access, remap the memory address, and remap I/O + transaction types. + # MSM IOMMU support config MSM_IOMMU bool "MSM IOMMU Support" @@ -42,7 +52,7 @@ config AMD_IOMMU select PCI_PRI select PCI_PASID select IOMMU_API - depends on X86_64 && PCI && ACPI && X86_IO_APIC + depends on X86_64 && PCI && ACPI ---help--- With this option you can enable support for AMD IOMMU hardware in your system. An IOMMU is a hardware component which provides @@ -65,8 +75,8 @@ config AMD_IOMMU_STATS If unsure, say N. config AMD_IOMMU_V2 - tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)" - depends on AMD_IOMMU && PROFILING && EXPERIMENTAL + tristate "AMD IOMMU Version 2 driver" + depends on AMD_IOMMU && PROFILING select MMU_NOTIFIER ---help--- This option enables support for the AMD IOMMUv2 features of the IOMMU @@ -119,8 +129,8 @@ config INTEL_IOMMU_FLOPPY_WA 16MiB to make floppy (an ISA device) work. config IRQ_REMAP - bool "Support for Interrupt Remapping (EXPERIMENTAL)" - depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL + bool "Support for Interrupt Remapping" + depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI select DMAR_TABLE ---help--- Supports Interrupt remapping for IO-APIC and MSI devices. @@ -130,7 +140,7 @@ config IRQ_REMAP # OMAP IOMMU support config OMAP_IOMMU bool "OMAP IOMMU Support" - depends on ARCH_OMAP + depends on ARCH_OMAP2PLUS select IOMMU_API config OMAP_IOVMM @@ -158,7 +168,7 @@ config TEGRA_IOMMU_GART config TEGRA_IOMMU_SMMU bool "Tegra SMMU IOMMU Support" - depends on ARCH_TEGRA_3x_SOC && TEGRA_AHB + depends on ARCH_TEGRA && TEGRA_AHB select IOMMU_API help Enables support for remapping discontiguous physical memory @@ -168,13 +178,13 @@ config TEGRA_IOMMU_SMMU config EXYNOS_IOMMU bool "Exynos IOMMU Support" - depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU + depends on ARCH_EXYNOS select IOMMU_API help - Support for the IOMMU(System MMU) of Samsung Exynos application - processor family. This enables H/W multimedia accellerators to see - non-linear physical memory chunks as a linear memory in their - address spaces + Support for the IOMMU (System MMU) of Samsung Exynos application + processor family. This enables H/W multimedia accelerators to see + non-linear physical memory chunks as linear memory in their + address space. If unsure, say N here. @@ -183,8 +193,116 @@ config EXYNOS_IOMMU_DEBUG depends on EXYNOS_IOMMU help Select this to see the detailed log message that shows what - happens in the IOMMU driver + happens in the IOMMU driver. + + Say N unless you need kernel log message for IOMMU debugging. + +config SHMOBILE_IPMMU + bool + +config SHMOBILE_IPMMU_TLB + bool + +config SHMOBILE_IOMMU + bool "IOMMU for Renesas IPMMU/IPMMUI" + default n + depends on ARM + depends on ARCH_SHMOBILE || COMPILE_TEST + select IOMMU_API + select ARM_DMA_USE_IOMMU + select SHMOBILE_IPMMU + select SHMOBILE_IPMMU_TLB + help + Support for Renesas IPMMU/IPMMUI. This option enables + remapping of DMA memory accesses from all of the IP blocks + on the ICB. + + Warning: Drivers (including userspace drivers of UIO + devices) of the IP blocks on the ICB *must* use addresses + allocated from the IPMMU (iova) for DMA with this option + enabled. + + If unsure, say N. + +choice + prompt "IPMMU/IPMMUI address space size" + default SHMOBILE_IOMMU_ADDRSIZE_2048MB + depends on SHMOBILE_IOMMU + help + This option sets IPMMU/IPMMUI address space size by + adjusting the 1st level page table size. The page table size + is calculated as follows: + + page table size = number of page table entries * 4 bytes + number of page table entries = address space size / 1 MiB + + For example, when the address space size is 2048 MiB, the + 1st level page table size is 8192 bytes. + + config SHMOBILE_IOMMU_ADDRSIZE_2048MB + bool "2 GiB" + + config SHMOBILE_IOMMU_ADDRSIZE_1024MB + bool "1 GiB" + + config SHMOBILE_IOMMU_ADDRSIZE_512MB + bool "512 MiB" + + config SHMOBILE_IOMMU_ADDRSIZE_256MB + bool "256 MiB" + + config SHMOBILE_IOMMU_ADDRSIZE_128MB + bool "128 MiB" + + config SHMOBILE_IOMMU_ADDRSIZE_64MB + bool "64 MiB" + + config SHMOBILE_IOMMU_ADDRSIZE_32MB + bool "32 MiB" + +endchoice + +config SHMOBILE_IOMMU_L1SIZE + int + default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB + default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB + default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB + default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB + default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB + default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB + default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB + +config IPMMU_VMSA + bool "Renesas VMSA-compatible IPMMU" + depends on ARM_LPAE + depends on ARCH_SHMOBILE || COMPILE_TEST + select IOMMU_API + select ARM_DMA_USE_IOMMU + help + Support for the Renesas VMSA-compatible IPMMU Renesas found in the + R-Mobile APE6 and R-Car H2/M2 SoCs. + + If unsure, say N. + +config SPAPR_TCE_IOMMU + bool "sPAPR TCE IOMMU Support" + depends on PPC_POWERNV || PPC_PSERIES + select IOMMU_API + help + Enables bits of IOMMU API required by VFIO. The iommu_ops + is not implemented as it is not necessary for VFIO. + +config ARM_SMMU + bool "ARM Ltd. System MMU (SMMU) Support" + depends on ARM64 || (ARM_LPAE && OF) + select IOMMU_API + select ARM_DMA_USE_IOMMU if ARM + help + Support for implementations of the ARM System MMU architecture + versions 1 and 2. The driver supports both v7l and v8l table + formats with 4k and 64k page sizes. - Say N unless you need kernel log message for IOMMU debugging + Say Y here if your SoC includes an IOMMU device implementing + the ARM SMMU architecture. endif # IOMMU_SUPPORT diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile index f66b816d455..8893bad048e 100644 --- a/drivers/iommu/Makefile +++ b/drivers/iommu/Makefile @@ -1,10 +1,13 @@ obj-$(CONFIG_IOMMU_API) += iommu.o +obj-$(CONFIG_IOMMU_API) += iommu-traces.o obj-$(CONFIG_OF_IOMMU) += of_iommu.o obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o obj-$(CONFIG_AMD_IOMMU_V2) += amd_iommu_v2.o +obj-$(CONFIG_ARM_SMMU) += arm-smmu.o obj-$(CONFIG_DMAR_TABLE) += dmar.o obj-$(CONFIG_INTEL_IOMMU) += iova.o intel-iommu.o +obj-$(CONFIG_IPMMU_VMSA) += ipmmu-vmsa.o obj-$(CONFIG_IRQ_REMAP) += intel_irq_remapping.o irq_remapping.o obj-$(CONFIG_OMAP_IOMMU) += omap-iommu.o obj-$(CONFIG_OMAP_IOMMU) += omap-iommu2.o @@ -13,3 +16,6 @@ obj-$(CONFIG_OMAP_IOMMU_DEBUG) += omap-iommu-debug.o obj-$(CONFIG_TEGRA_IOMMU_GART) += tegra-gart.o obj-$(CONFIG_TEGRA_IOMMU_SMMU) += tegra-smmu.o obj-$(CONFIG_EXYNOS_IOMMU) += exynos-iommu.o +obj-$(CONFIG_SHMOBILE_IOMMU) += shmobile-iommu.o +obj-$(CONFIG_SHMOBILE_IPMMU) += shmobile-ipmmu.o +obj-$(CONFIG_FSL_PAMU) += fsl_pamu.o fsl_pamu_domain.o diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index c1c74e030a5..4aec6a29e31 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -46,6 +46,7 @@ #include "amd_iommu_proto.h" #include "amd_iommu_types.h" #include "irq_remapping.h" +#include "pci.h" #define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28)) @@ -173,7 +174,7 @@ static inline u16 get_device_id(struct device *dev) { struct pci_dev *pdev = to_pci_dev(dev); - return calc_devid(pdev->bus->number, pdev->devfn); + return PCI_DEVID(pdev->bus->number, pdev->devfn); } static struct iommu_dev_data *get_dev_data(struct device *dev) @@ -247,8 +248,8 @@ static bool check_device(struct device *dev) if (!dev || !dev->dma_mask) return false; - /* No device or no PCI device */ - if (dev->bus != &pci_bus_type) + /* No PCI device */ + if (!dev_is_pci(dev)) return false; devid = get_device_id(dev); @@ -263,12 +264,6 @@ static bool check_device(struct device *dev) return true; } -static void swap_pci_ref(struct pci_dev **from, struct pci_dev *to) -{ - pci_dev_put(*from); - *from = to; -} - static struct pci_bus *find_hosted_bus(struct pci_bus *bus) { while (!bus->self) { @@ -292,14 +287,27 @@ static struct pci_dev *get_isolation_root(struct pci_dev *pdev) /* * If it's a multifunction device that does not support our - * required ACS flags, add to the same group as function 0. + * required ACS flags, add to the same group as lowest numbered + * function that also does not suport the required ACS flags. */ if (dma_pdev->multifunction && - !pci_acs_enabled(dma_pdev, REQ_ACS_FLAGS)) - swap_pci_ref(&dma_pdev, - pci_get_slot(dma_pdev->bus, - PCI_DEVFN(PCI_SLOT(dma_pdev->devfn), - 0))); + !pci_acs_enabled(dma_pdev, REQ_ACS_FLAGS)) { + u8 i, slot = PCI_SLOT(dma_pdev->devfn); + + for (i = 0; i < 8; i++) { + struct pci_dev *tmp; + + tmp = pci_get_slot(dma_pdev->bus, PCI_DEVFN(slot, i)); + if (!tmp) + continue; + + if (!pci_acs_enabled(tmp, REQ_ACS_FLAGS)) { + swap_pci_ref(&dma_pdev, tmp); + break; + } + pci_dev_put(tmp); + } + } /* * Devices on the root bus go through the iommu. If that's not us, @@ -448,8 +456,10 @@ static int iommu_init_device(struct device *dev) } ret = init_iommu_group(dev); - if (ret) + if (ret) { + free_dev_data(dev_data); return ret; + } if (pci_iommuv2_capable(pdev)) { struct amd_iommu *iommu; @@ -649,26 +659,26 @@ retry: case EVENT_TYPE_ILL_DEV: printk("ILLEGAL_DEV_TABLE_ENTRY device=%02x:%02x.%x " "address=0x%016llx flags=0x%04x]\n", - PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), + PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), address, flags); dump_dte_entry(devid); break; case EVENT_TYPE_IO_FAULT: printk("IO_PAGE_FAULT device=%02x:%02x.%x " "domain=0x%04x address=0x%016llx flags=0x%04x]\n", - PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), + PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), domid, address, flags); break; case EVENT_TYPE_DEV_TAB_ERR: printk("DEV_TAB_HARDWARE_ERROR device=%02x:%02x.%x " "address=0x%016llx flags=0x%04x]\n", - PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), + PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), address, flags); break; case EVENT_TYPE_PAGE_TAB_ERR: printk("PAGE_TAB_HARDWARE_ERROR device=%02x:%02x.%x " "domain=0x%04x address=0x%016llx flags=0x%04x]\n", - PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), + PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), domid, address, flags); break; case EVENT_TYPE_ILL_CMD: @@ -682,13 +692,13 @@ retry: case EVENT_TYPE_IOTLB_INV_TO: printk("IOTLB_INV_TIMEOUT device=%02x:%02x.%x " "address=0x%016llx]\n", - PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), + PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), address); break; case EVENT_TYPE_INV_DEV_REQ: printk("INVALID_DEVICE_REQUEST device=%02x:%02x.%x " "address=0x%016llx flags=0x%04x]\n", - PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), + PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid), address, flags); break; default: @@ -701,9 +711,6 @@ retry: static void iommu_poll_events(struct amd_iommu *iommu) { u32 head, tail; - unsigned long flags; - - spin_lock_irqsave(&iommu->lock, flags); head = readl(iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); tail = readl(iommu->mmio_base + MMIO_EVT_TAIL_OFFSET); @@ -714,8 +721,6 @@ static void iommu_poll_events(struct amd_iommu *iommu) } writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET); - - spin_unlock_irqrestore(&iommu->lock, flags); } static void iommu_handle_ppr_entry(struct amd_iommu *iommu, u64 *raw) @@ -740,17 +745,11 @@ static void iommu_handle_ppr_entry(struct amd_iommu *iommu, u64 *raw) static void iommu_poll_ppr_log(struct amd_iommu *iommu) { - unsigned long flags; u32 head, tail; if (iommu->ppr_log == NULL) return; - /* enable ppr interrupts again */ - writel(MMIO_STATUS_PPR_INT_MASK, iommu->mmio_base + MMIO_STATUS_OFFSET); - - spin_lock_irqsave(&iommu->lock, flags); - head = readl(iommu->mmio_base + MMIO_PPR_HEAD_OFFSET); tail = readl(iommu->mmio_base + MMIO_PPR_TAIL_OFFSET); @@ -786,34 +785,50 @@ static void iommu_poll_ppr_log(struct amd_iommu *iommu) head = (head + PPR_ENTRY_SIZE) % PPR_LOG_SIZE; writel(head, iommu->mmio_base + MMIO_PPR_HEAD_OFFSET); - /* - * Release iommu->lock because ppr-handling might need to - * re-acquire it - */ - spin_unlock_irqrestore(&iommu->lock, flags); - /* Handle PPR entry */ iommu_handle_ppr_entry(iommu, entry); - spin_lock_irqsave(&iommu->lock, flags); - /* Refresh ring-buffer information */ head = readl(iommu->mmio_base + MMIO_PPR_HEAD_OFFSET); tail = readl(iommu->mmio_base + MMIO_PPR_TAIL_OFFSET); } - - spin_unlock_irqrestore(&iommu->lock, flags); } irqreturn_t amd_iommu_int_thread(int irq, void *data) { - struct amd_iommu *iommu; + struct amd_iommu *iommu = (struct amd_iommu *) data; + u32 status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET); - for_each_iommu(iommu) { - iommu_poll_events(iommu); - iommu_poll_ppr_log(iommu); - } + while (status & (MMIO_STATUS_EVT_INT_MASK | MMIO_STATUS_PPR_INT_MASK)) { + /* Enable EVT and PPR interrupts again */ + writel((MMIO_STATUS_EVT_INT_MASK | MMIO_STATUS_PPR_INT_MASK), + iommu->mmio_base + MMIO_STATUS_OFFSET); + + if (status & MMIO_STATUS_EVT_INT_MASK) { + pr_devel("AMD-Vi: Processing IOMMU Event Log\n"); + iommu_poll_events(iommu); + } + if (status & MMIO_STATUS_PPR_INT_MASK) { + pr_devel("AMD-Vi: Processing IOMMU PPR Log\n"); + iommu_poll_ppr_log(iommu); + } + + /* + * Hardware bug: ERBT1312 + * When re-enabling interrupt (by writing 1 + * to clear the bit), the hardware might also try to set + * the interrupt bit in the event status register. + * In this scenario, the bit will be set, and disable + * subsequent interrupts. + * + * Workaround: The IOMMU driver should read back the + * status register and check if the interrupt bits are cleared. + * If not, driver will need to go through the interrupt handler + * again and re-clear the bits + */ + status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET); + } return IRQ_HANDLED; } @@ -948,7 +963,7 @@ static void build_inv_iommu_pasid(struct iommu_cmd *cmd, u16 domid, int pasid, address &= ~(0xfffULL); - cmd->data[0] = pasid & PASID_MASK; + cmd->data[0] = pasid; cmd->data[1] = domid; cmd->data[2] = lower_32_bits(address); cmd->data[3] = upper_32_bits(address); @@ -967,10 +982,10 @@ static void build_inv_iotlb_pasid(struct iommu_cmd *cmd, u16 devid, int pasid, address &= ~(0xfffULL); cmd->data[0] = devid; - cmd->data[0] |= (pasid & 0xff) << 16; + cmd->data[0] |= ((pasid >> 8) & 0xff) << 16; cmd->data[0] |= (qdep & 0xff) << 24; cmd->data[1] = devid; - cmd->data[1] |= ((pasid >> 8) & 0xfff) << 16; + cmd->data[1] |= (pasid & 0xff) << 16; cmd->data[2] = lower_32_bits(address); cmd->data[2] |= CMD_INV_IOMMU_PAGES_GN_MASK; cmd->data[3] = upper_32_bits(address); @@ -986,7 +1001,7 @@ static void build_complete_ppr(struct iommu_cmd *cmd, u16 devid, int pasid, cmd->data[0] = devid; if (gn) { - cmd->data[1] = pasid & PASID_MASK; + cmd->data[1] = pasid; cmd->data[2] = CMD_INV_IOMMU_PAGES_GN_MASK; } cmd->data[3] = tag & 0x1ff; @@ -1484,6 +1499,10 @@ static unsigned long iommu_unmap_page(struct protection_domain *dom, /* Large PTE found which maps this address */ unmap_size = PTE_PAGE_SIZE(*pte); + + /* Only unmap from the first pte in the page */ + if ((unmap_size - 1) & bus_addr) + break; count = PAGE_SIZE_PTE_COUNT(unmap_size); for (i = 0; i < count; i++) pte[i] = 0ULL; @@ -1493,7 +1512,7 @@ static unsigned long iommu_unmap_page(struct protection_domain *dom, unmapped += unmap_size; } - BUG_ON(!is_power_of_2(unmapped)); + BUG_ON(unmapped && !is_power_of_2(unmapped)); return unmapped; } @@ -1893,34 +1912,59 @@ static void domain_id_free(int id) write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); } +#define DEFINE_FREE_PT_FN(LVL, FN) \ +static void free_pt_##LVL (unsigned long __pt) \ +{ \ + unsigned long p; \ + u64 *pt; \ + int i; \ + \ + pt = (u64 *)__pt; \ + \ + for (i = 0; i < 512; ++i) { \ + if (!IOMMU_PTE_PRESENT(pt[i])) \ + continue; \ + \ + p = (unsigned long)IOMMU_PTE_PAGE(pt[i]); \ + FN(p); \ + } \ + free_page((unsigned long)pt); \ +} + +DEFINE_FREE_PT_FN(l2, free_page) +DEFINE_FREE_PT_FN(l3, free_pt_l2) +DEFINE_FREE_PT_FN(l4, free_pt_l3) +DEFINE_FREE_PT_FN(l5, free_pt_l4) +DEFINE_FREE_PT_FN(l6, free_pt_l5) + static void free_pagetable(struct protection_domain *domain) { - int i, j; - u64 *p1, *p2, *p3; - - p1 = domain->pt_root; - - if (!p1) - return; + unsigned long root = (unsigned long)domain->pt_root; - for (i = 0; i < 512; ++i) { - if (!IOMMU_PTE_PRESENT(p1[i])) - continue; - - p2 = IOMMU_PTE_PAGE(p1[i]); - for (j = 0; j < 512; ++j) { - if (!IOMMU_PTE_PRESENT(p2[j])) - continue; - p3 = IOMMU_PTE_PAGE(p2[j]); - free_page((unsigned long)p3); - } - - free_page((unsigned long)p2); + switch (domain->mode) { + case PAGE_MODE_NONE: + break; + case PAGE_MODE_1_LEVEL: + free_page(root); + break; + case PAGE_MODE_2_LEVEL: + free_pt_l2(root); + break; + case PAGE_MODE_3_LEVEL: + free_pt_l3(root); + break; + case PAGE_MODE_4_LEVEL: + free_pt_l4(root); + break; + case PAGE_MODE_5_LEVEL: + free_pt_l5(root); + break; + case PAGE_MODE_6_LEVEL: + free_pt_l6(root); + break; + default: + BUG(); } - - free_page((unsigned long)p1); - - domain->pt_root = NULL; } static void free_gcr3_tbl_level1(u64 *tbl) @@ -2466,18 +2510,16 @@ static int device_change_notifier(struct notifier_block *nb, /* allocate a protection domain if a device is added */ dma_domain = find_protection_domain(devid); - if (dma_domain) - goto out; - dma_domain = dma_ops_domain_alloc(); - if (!dma_domain) - goto out; - dma_domain->target_dev = devid; - - spin_lock_irqsave(&iommu_pd_list_lock, flags); - list_add_tail(&dma_domain->list, &iommu_pd_list); - spin_unlock_irqrestore(&iommu_pd_list_lock, flags); - - dev_data = get_dev_data(dev); + if (!dma_domain) { + dma_domain = dma_ops_domain_alloc(); + if (!dma_domain) + goto out; + dma_domain->target_dev = devid; + + spin_lock_irqsave(&iommu_pd_list_lock, flags); + list_add_tail(&dma_domain->list, &iommu_pd_list); + spin_unlock_irqrestore(&iommu_pd_list_lock, flags); + } dev->archdata.dma_ops = &amd_iommu_dma_ops; @@ -2841,24 +2883,6 @@ static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, } /* - * This is a special map_sg function which is used if we should map a - * device which is not handled by an AMD IOMMU in the system. - */ -static int map_sg_no_iommu(struct device *dev, struct scatterlist *sglist, - int nelems, int dir) -{ - struct scatterlist *s; - int i; - - for_each_sg(sglist, s, nelems, i) { - s->dma_address = (dma_addr_t)sg_phys(s); - s->dma_length = s->length; - } - - return nelems; -} - -/* * The exported map_sg function for dma_ops (handles scatter-gather * lists). */ @@ -2877,9 +2901,7 @@ static int map_sg(struct device *dev, struct scatterlist *sglist, INC_STATS_COUNTER(cnt_map_sg); domain = get_domain(dev); - if (PTR_ERR(domain) == -EINVAL) - return map_sg_no_iommu(dev, sglist, nelems, dir); - else if (IS_ERR(domain)) + if (IS_ERR(domain)) return 0; dma_mask = *dev->dma_mask; @@ -3187,8 +3209,7 @@ int __init amd_iommu_init_dma_ops(void) free_domains: for_each_iommu(iommu) { - if (iommu->default_dom) - dma_ops_domain_free(iommu->default_dom); + dma_ops_domain_free(iommu->default_dom); } return ret; @@ -3413,7 +3434,7 @@ static size_t amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova, } static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom, - unsigned long iova) + dma_addr_t iova) { struct protection_domain *domain = dom->priv; unsigned long offset_mask; @@ -3478,8 +3499,6 @@ int __init amd_iommu_init_passthrough(void) { struct iommu_dev_data *dev_data; struct pci_dev *dev = NULL; - struct amd_iommu *iommu; - u16 devid; int ret; ret = alloc_passthrough_domain(); @@ -3493,12 +3512,6 @@ int __init amd_iommu_init_passthrough(void) dev_data = get_dev_data(&dev->dev); dev_data->passthrough = true; - devid = get_device_id(&dev->dev); - - iommu = amd_iommu_rlookup_table[devid]; - if (!iommu) - continue; - attach_device(&dev->dev, pt_domain); } @@ -3950,6 +3963,9 @@ static struct irq_remap_table *get_irq_table(u16 devid, bool ioapic) if (!table) goto out; + /* Initialize table spin-lock */ + spin_lock_init(&table->lock); + if (ioapic) /* Keep the first 32 indexes free for IOAPIC interrupts */ table->min_index = 32; @@ -3975,7 +3991,7 @@ static struct irq_remap_table *get_irq_table(u16 devid, bool ioapic) iommu_flush_dte(iommu, devid); if (devid != alias) { irq_lookup_table[alias] = table; - set_dte_irq_entry(devid, table); + set_dte_irq_entry(alias, table); iommu_flush_dte(iommu, alias); } @@ -4010,17 +4026,17 @@ static int alloc_irq_index(struct irq_cfg *cfg, u16 devid, int count) c = 0; if (c == count) { - struct irq_2_iommu *irte_info; + struct irq_2_irte *irte_info; for (; c != 0; --c) table->table[index - c + 1] = IRTE_ALLOCATED; index -= count - 1; - irte_info = &cfg->irq_2_iommu; - irte_info->sub_handle = devid; - irte_info->irte_index = index; - irte_info->iommu = (void *)cfg; + cfg->remapped = 1; + irte_info = &cfg->irq_2_irte; + irte_info->devid = devid; + irte_info->index = index; goto out; } @@ -4101,7 +4117,7 @@ static int setup_ioapic_entry(int irq, struct IO_APIC_route_entry *entry, struct io_apic_irq_attr *attr) { struct irq_remap_table *table; - struct irq_2_iommu *irte_info; + struct irq_2_irte *irte_info; struct irq_cfg *cfg; union irte irte; int ioapic_id; @@ -4113,7 +4129,7 @@ static int setup_ioapic_entry(int irq, struct IO_APIC_route_entry *entry, if (!cfg) return -EINVAL; - irte_info = &cfg->irq_2_iommu; + irte_info = &cfg->irq_2_irte; ioapic_id = mpc_ioapic_id(attr->ioapic); devid = get_ioapic_devid(ioapic_id); @@ -4127,9 +4143,9 @@ static int setup_ioapic_entry(int irq, struct IO_APIC_route_entry *entry, index = attr->ioapic_pin; /* Setup IRQ remapping info */ - irte_info->sub_handle = devid; - irte_info->irte_index = index; - irte_info->iommu = (void *)cfg; + cfg->remapped = 1; + irte_info->devid = devid; + irte_info->index = index; /* Setup IRTE for IOMMU */ irte.val = 0; @@ -4163,7 +4179,7 @@ static int setup_ioapic_entry(int irq, struct IO_APIC_route_entry *entry, static int set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) { - struct irq_2_iommu *irte_info; + struct irq_2_irte *irte_info; unsigned int dest, irq; struct irq_cfg *cfg; union irte irte; @@ -4174,12 +4190,12 @@ static int set_affinity(struct irq_data *data, const struct cpumask *mask, cfg = data->chip_data; irq = data->irq; - irte_info = &cfg->irq_2_iommu; + irte_info = &cfg->irq_2_irte; if (!cpumask_intersects(mask, cpu_online_mask)) return -EINVAL; - if (get_irte(irte_info->sub_handle, irte_info->irte_index, &irte)) + if (get_irte(irte_info->devid, irte_info->index, &irte)) return -EBUSY; if (assign_irq_vector(irq, cfg, mask)) @@ -4195,7 +4211,7 @@ static int set_affinity(struct irq_data *data, const struct cpumask *mask, irte.fields.vector = cfg->vector; irte.fields.destination = dest; - modify_irte(irte_info->sub_handle, irte_info->irte_index, irte); + modify_irte(irte_info->devid, irte_info->index, irte); if (cfg->move_in_progress) send_cleanup_vector(cfg); @@ -4207,16 +4223,16 @@ static int set_affinity(struct irq_data *data, const struct cpumask *mask, static int free_irq(int irq) { - struct irq_2_iommu *irte_info; + struct irq_2_irte *irte_info; struct irq_cfg *cfg; cfg = irq_get_chip_data(irq); if (!cfg) return -EINVAL; - irte_info = &cfg->irq_2_iommu; + irte_info = &cfg->irq_2_irte; - free_irte(irte_info->sub_handle, irte_info->irte_index); + free_irte(irte_info->devid, irte_info->index); return 0; } @@ -4225,7 +4241,7 @@ static void compose_msi_msg(struct pci_dev *pdev, unsigned int irq, unsigned int dest, struct msi_msg *msg, u8 hpet_id) { - struct irq_2_iommu *irte_info; + struct irq_2_irte *irte_info; struct irq_cfg *cfg; union irte irte; @@ -4233,7 +4249,7 @@ static void compose_msi_msg(struct pci_dev *pdev, if (!cfg) return; - irte_info = &cfg->irq_2_iommu; + irte_info = &cfg->irq_2_irte; irte.val = 0; irte.fields.vector = cfg->vector; @@ -4242,11 +4258,11 @@ static void compose_msi_msg(struct pci_dev *pdev, irte.fields.dm = apic->irq_dest_mode; irte.fields.valid = 1; - modify_irte(irte_info->sub_handle, irte_info->irte_index, irte); + modify_irte(irte_info->devid, irte_info->index, irte); msg->address_hi = MSI_ADDR_BASE_HI; msg->address_lo = MSI_ADDR_BASE_LO; - msg->data = irte_info->irte_index; + msg->data = irte_info->index; } static int msi_alloc_irq(struct pci_dev *pdev, int irq, int nvec) @@ -4271,7 +4287,7 @@ static int msi_alloc_irq(struct pci_dev *pdev, int irq, int nvec) static int msi_setup_irq(struct pci_dev *pdev, unsigned int irq, int index, int offset) { - struct irq_2_iommu *irte_info; + struct irq_2_irte *irte_info; struct irq_cfg *cfg; u16 devid; @@ -4286,18 +4302,18 @@ static int msi_setup_irq(struct pci_dev *pdev, unsigned int irq, return 0; devid = get_device_id(&pdev->dev); - irte_info = &cfg->irq_2_iommu; + irte_info = &cfg->irq_2_irte; - irte_info->sub_handle = devid; - irte_info->irte_index = index + offset; - irte_info->iommu = (void *)cfg; + cfg->remapped = 1; + irte_info->devid = devid; + irte_info->index = index + offset; return 0; } static int setup_hpet_msi(unsigned int irq, unsigned int id) { - struct irq_2_iommu *irte_info; + struct irq_2_irte *irte_info; struct irq_cfg *cfg; int index, devid; @@ -4305,7 +4321,7 @@ static int setup_hpet_msi(unsigned int irq, unsigned int id) if (!cfg) return -EINVAL; - irte_info = &cfg->irq_2_iommu; + irte_info = &cfg->irq_2_irte; devid = get_hpet_devid(id); if (devid < 0) return devid; @@ -4314,9 +4330,9 @@ static int setup_hpet_msi(unsigned int irq, unsigned int id) if (index < 0) return index; - irte_info->sub_handle = devid; - irte_info->irte_index = index; - irte_info->iommu = (void *)cfg; + cfg->remapped = 1; + irte_info->devid = devid; + irte_info->index = index; return 0; } diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 81837b0710a..0e08545d729 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -26,7 +26,6 @@ #include <linux/msi.h> #include <linux/amd-iommu.h> #include <linux/export.h> -#include <acpi/acpi.h> #include <asm/pci-direct.h> #include <asm/iommu.h> #include <asm/gart.h> @@ -99,7 +98,7 @@ struct ivhd_header { u64 mmio_phys; u16 pci_seg; u16 info; - u32 reserved; + u32 efr; } __attribute__((packed)); /* @@ -151,9 +150,10 @@ int amd_iommus_present; bool amd_iommu_np_cache __read_mostly; bool amd_iommu_iotlb_sup __read_mostly = true; -u32 amd_iommu_max_pasids __read_mostly = ~0; +u32 amd_iommu_max_pasid __read_mostly = ~0; bool amd_iommu_v2_present __read_mostly; +bool amd_iommu_pc_present __read_mostly; bool amd_iommu_force_isolation __read_mostly; @@ -213,6 +213,14 @@ enum iommu_init_state { IOMMU_INIT_ERROR, }; +/* Early ioapic and hpet maps from kernel command line */ +#define EARLY_MAP_SIZE 4 +static struct devid_map __initdata early_ioapic_map[EARLY_MAP_SIZE]; +static struct devid_map __initdata early_hpet_map[EARLY_MAP_SIZE]; +static int __initdata early_ioapic_map_size; +static int __initdata early_hpet_map_size; +static bool __initdata cmdline_maps; + static enum iommu_init_state init_state = IOMMU_START_STATE; static int amd_iommu_enable_interrupts(void); @@ -361,23 +369,23 @@ static void iommu_disable(struct amd_iommu *iommu) * mapping and unmapping functions for the IOMMU MMIO space. Each AMD IOMMU in * the system has one. */ -static u8 __iomem * __init iommu_map_mmio_space(u64 address) +static u8 __iomem * __init iommu_map_mmio_space(u64 address, u64 end) { - if (!request_mem_region(address, MMIO_REGION_LENGTH, "amd_iommu")) { - pr_err("AMD-Vi: Can not reserve memory region %llx for mmio\n", - address); + if (!request_mem_region(address, end, "amd_iommu")) { + pr_err("AMD-Vi: Can not reserve memory region %llx-%llx for mmio\n", + address, end); pr_err("AMD-Vi: This is a BIOS bug. Please contact your hardware vendor\n"); return NULL; } - return (u8 __iomem *)ioremap_nocache(address, MMIO_REGION_LENGTH); + return (u8 __iomem *)ioremap_nocache(address, end); } static void __init iommu_unmap_mmio_space(struct amd_iommu *iommu) { if (iommu->mmio_base) iounmap(iommu->mmio_base); - release_mem_region(iommu->mmio_phys, MMIO_REGION_LENGTH); + release_mem_region(iommu->mmio_phys, iommu->mmio_phys_end); } /**************************************************************************** @@ -406,7 +414,7 @@ static int __init find_last_devid_on_pci(int bus, int dev, int fn, int cap_ptr) u32 cap; cap = read_pci_config(bus, dev, fn, cap_ptr+MMIO_RANGE_OFFSET); - update_last_devid(calc_devid(MMIO_GET_BUS(cap), MMIO_GET_LD(cap))); + update_last_devid(PCI_DEVID(MMIO_GET_BUS(cap), MMIO_GET_LD(cap))); return 0; } @@ -423,7 +431,7 @@ static int __init find_last_devid_from_ivhd(struct ivhd_header *h) p += sizeof(*h); end += h->length; - find_last_devid_on_pci(PCI_BUS(h->devid), + find_last_devid_on_pci(PCI_BUS_NUM(h->devid), PCI_SLOT(h->devid), PCI_FUNC(h->devid), h->cap_ptr); @@ -703,31 +711,66 @@ static void __init set_dev_entry_from_acpi(struct amd_iommu *iommu, set_iommu_for_device(iommu, devid); } -static int add_special_device(u8 type, u8 id, u16 devid) +static int __init add_special_device(u8 type, u8 id, u16 devid, bool cmd_line) { struct devid_map *entry; struct list_head *list; - if (type != IVHD_SPECIAL_IOAPIC && type != IVHD_SPECIAL_HPET) + if (type == IVHD_SPECIAL_IOAPIC) + list = &ioapic_map; + else if (type == IVHD_SPECIAL_HPET) + list = &hpet_map; + else return -EINVAL; + list_for_each_entry(entry, list, list) { + if (!(entry->id == id && entry->cmd_line)) + continue; + + pr_info("AMD-Vi: Command-line override present for %s id %d - ignoring\n", + type == IVHD_SPECIAL_IOAPIC ? "IOAPIC" : "HPET", id); + + return 0; + } + entry = kzalloc(sizeof(*entry), GFP_KERNEL); if (!entry) return -ENOMEM; - entry->id = id; - entry->devid = devid; - - if (type == IVHD_SPECIAL_IOAPIC) - list = &ioapic_map; - else - list = &hpet_map; + entry->id = id; + entry->devid = devid; + entry->cmd_line = cmd_line; list_add_tail(&entry->list, list); return 0; } +static int __init add_early_maps(void) +{ + int i, ret; + + for (i = 0; i < early_ioapic_map_size; ++i) { + ret = add_special_device(IVHD_SPECIAL_IOAPIC, + early_ioapic_map[i].id, + early_ioapic_map[i].devid, + early_ioapic_map[i].cmd_line); + if (ret) + return ret; + } + + for (i = 0; i < early_hpet_map_size; ++i) { + ret = add_special_device(IVHD_SPECIAL_HPET, + early_hpet_map[i].id, + early_hpet_map[i].devid, + early_hpet_map[i].cmd_line); + if (ret) + return ret; + } + + return 0; +} + /* * Reads the device exclusion range from ACPI and initializes the IOMMU with * it @@ -745,7 +788,7 @@ static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m) * per device. But we can enable the exclusion range per * device. This is done here */ - set_dev_entry_bit(m->devid, DEV_ENTRY_EX); + set_dev_entry_bit(devid, DEV_ENTRY_EX); iommu->exclusion_start = m->range_start; iommu->exclusion_length = m->range_length; } @@ -764,6 +807,12 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu, u32 dev_i, ext_flags = 0; bool alias = false; struct ivhd_entry *e; + int ret; + + + ret = add_early_maps(); + if (ret) + return ret; /* * First save the recommended feature enable bits from ACPI @@ -784,10 +833,10 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu, DUMP_printk(" DEV_ALL\t\t\t first devid: %02x:%02x.%x" " last device %02x:%02x.%x flags: %02x\n", - PCI_BUS(iommu->first_device), + PCI_BUS_NUM(iommu->first_device), PCI_SLOT(iommu->first_device), PCI_FUNC(iommu->first_device), - PCI_BUS(iommu->last_device), + PCI_BUS_NUM(iommu->last_device), PCI_SLOT(iommu->last_device), PCI_FUNC(iommu->last_device), e->flags); @@ -801,7 +850,7 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu, DUMP_printk(" DEV_SELECT\t\t\t devid: %02x:%02x.%x " "flags: %02x\n", - PCI_BUS(e->devid), + PCI_BUS_NUM(e->devid), PCI_SLOT(e->devid), PCI_FUNC(e->devid), e->flags); @@ -813,7 +862,7 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu, DUMP_printk(" DEV_SELECT_RANGE_START\t " "devid: %02x:%02x.%x flags: %02x\n", - PCI_BUS(e->devid), + PCI_BUS_NUM(e->devid), PCI_SLOT(e->devid), PCI_FUNC(e->devid), e->flags); @@ -827,11 +876,11 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu, DUMP_printk(" DEV_ALIAS\t\t\t devid: %02x:%02x.%x " "flags: %02x devid_to: %02x:%02x.%x\n", - PCI_BUS(e->devid), + PCI_BUS_NUM(e->devid), PCI_SLOT(e->devid), PCI_FUNC(e->devid), e->flags, - PCI_BUS(e->ext >> 8), + PCI_BUS_NUM(e->ext >> 8), PCI_SLOT(e->ext >> 8), PCI_FUNC(e->ext >> 8)); @@ -846,11 +895,11 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu, DUMP_printk(" DEV_ALIAS_RANGE\t\t " "devid: %02x:%02x.%x flags: %02x " "devid_to: %02x:%02x.%x\n", - PCI_BUS(e->devid), + PCI_BUS_NUM(e->devid), PCI_SLOT(e->devid), PCI_FUNC(e->devid), e->flags, - PCI_BUS(e->ext >> 8), + PCI_BUS_NUM(e->ext >> 8), PCI_SLOT(e->ext >> 8), PCI_FUNC(e->ext >> 8)); @@ -864,7 +913,7 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu, DUMP_printk(" DEV_EXT_SELECT\t\t devid: %02x:%02x.%x " "flags: %02x ext: %08x\n", - PCI_BUS(e->devid), + PCI_BUS_NUM(e->devid), PCI_SLOT(e->devid), PCI_FUNC(e->devid), e->flags, e->ext); @@ -877,7 +926,7 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu, DUMP_printk(" DEV_EXT_SELECT_RANGE\t devid: " "%02x:%02x.%x flags: %02x ext: %08x\n", - PCI_BUS(e->devid), + PCI_BUS_NUM(e->devid), PCI_SLOT(e->devid), PCI_FUNC(e->devid), e->flags, e->ext); @@ -890,7 +939,7 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu, case IVHD_DEV_RANGE_END: DUMP_printk(" DEV_RANGE_END\t\t devid: %02x:%02x.%x\n", - PCI_BUS(e->devid), + PCI_BUS_NUM(e->devid), PCI_SLOT(e->devid), PCI_FUNC(e->devid)); @@ -924,12 +973,12 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu, DUMP_printk(" DEV_SPECIAL(%s[%d])\t\tdevid: %02x:%02x.%x\n", var, (int)handle, - PCI_BUS(devid), + PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid)); set_dev_entry_from_acpi(iommu, devid, e->flags, 0); - ret = add_special_device(type, handle, devid); + ret = add_special_device(type, handle, devid, false); if (ret) return ret; break; @@ -975,6 +1024,38 @@ static void __init free_iommu_all(void) } /* + * Family15h Model 10h-1fh erratum 746 (IOMMU Logging May Stall Translations) + * Workaround: + * BIOS should disable L2B micellaneous clock gating by setting + * L2_L2B_CK_GATE_CONTROL[CKGateL2BMiscDisable](D0F2xF4_x90[2]) = 1b + */ +static void amd_iommu_erratum_746_workaround(struct amd_iommu *iommu) +{ + u32 value; + + if ((boot_cpu_data.x86 != 0x15) || + (boot_cpu_data.x86_model < 0x10) || + (boot_cpu_data.x86_model > 0x1f)) + return; + + pci_write_config_dword(iommu->dev, 0xf0, 0x90); + pci_read_config_dword(iommu->dev, 0xf4, &value); + + if (value & BIT(2)) + return; + + /* Select NB indirect register 0x90 and enable writing */ + pci_write_config_dword(iommu->dev, 0xf0, 0x90 | (1 << 8)); + + pci_write_config_dword(iommu->dev, 0xf4, value | 0x4); + pr_info("AMD-Vi: Applying erratum 746 workaround for IOMMU at %s\n", + dev_name(&iommu->dev->dev)); + + /* Clear the enable writing bit */ + pci_write_config_dword(iommu->dev, 0xf0, 0x90); +} + +/* * This function clues the initialization function for one IOMMU * together and also allocates the command buffer and programs the * hardware. It does NOT enable the IOMMU. This is done afterwards. @@ -1004,7 +1085,18 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h) iommu->cap_ptr = h->cap_ptr; iommu->pci_seg = h->pci_seg; iommu->mmio_phys = h->mmio_phys; - iommu->mmio_base = iommu_map_mmio_space(h->mmio_phys); + + /* Check if IVHD EFR contains proper max banks/counters */ + if ((h->efr != 0) && + ((h->efr & (0xF << 13)) != 0) && + ((h->efr & (0x3F << 17)) != 0)) { + iommu->mmio_phys_end = MMIO_REG_END_OFFSET; + } else { + iommu->mmio_phys_end = MMIO_CNTR_CONF_OFFSET; + } + + iommu->mmio_base = iommu_map_mmio_space(iommu->mmio_phys, + iommu->mmio_phys_end); if (!iommu->mmio_base) return -ENOMEM; @@ -1054,7 +1146,7 @@ static int __init init_iommu_all(struct acpi_table_header *table) DUMP_printk("device: %02x:%02x.%01x cap: %04x " "seg: %d flags: %01x info %04x\n", - PCI_BUS(h->devid), PCI_SLOT(h->devid), + PCI_BUS_NUM(h->devid), PCI_SLOT(h->devid), PCI_FUNC(h->devid), h->cap_ptr, h->pci_seg, h->flags, h->info); DUMP_printk(" mmio-addr: %016llx\n", @@ -1079,12 +1171,39 @@ static int __init init_iommu_all(struct acpi_table_header *table) return 0; } + +static void init_iommu_perf_ctr(struct amd_iommu *iommu) +{ + u64 val = 0xabcd, val2 = 0; + + if (!iommu_feature(iommu, FEATURE_PC)) + return; + + amd_iommu_pc_present = true; + + /* Check if the performance counters can be written to */ + if ((0 != amd_iommu_pc_get_set_reg_val(0, 0, 0, 0, &val, true)) || + (0 != amd_iommu_pc_get_set_reg_val(0, 0, 0, 0, &val2, false)) || + (val != val2)) { + pr_err("AMD-Vi: Unable to write to IOMMU perf counter.\n"); + amd_iommu_pc_present = false; + return; + } + + pr_info("AMD-Vi: IOMMU performance counters supported\n"); + + val = readl(iommu->mmio_base + MMIO_CNTR_CONF_OFFSET); + iommu->max_banks = (u8) ((val >> 12) & 0x3f); + iommu->max_counters = (u8) ((val >> 7) & 0xf); +} + + static int iommu_init_pci(struct amd_iommu *iommu) { int cap_ptr = iommu->cap_ptr; u32 range, misc, low, high; - iommu->dev = pci_get_bus_and_slot(PCI_BUS(iommu->devid), + iommu->dev = pci_get_bus_and_slot(PCI_BUS_NUM(iommu->devid), iommu->devid & 0xff); if (!iommu->dev) return -ENODEV; @@ -1096,9 +1215,9 @@ static int iommu_init_pci(struct amd_iommu *iommu) pci_read_config_dword(iommu->dev, cap_ptr + MMIO_MISC_OFFSET, &misc); - iommu->first_device = calc_devid(MMIO_GET_BUS(range), + iommu->first_device = PCI_DEVID(MMIO_GET_BUS(range), MMIO_GET_FD(range)); - iommu->last_device = calc_devid(MMIO_GET_BUS(range), + iommu->last_device = PCI_DEVID(MMIO_GET_BUS(range), MMIO_GET_LD(range)); if (!(iommu->cap & (1 << IOMMU_CAP_IOTLB))) @@ -1112,14 +1231,16 @@ static int iommu_init_pci(struct amd_iommu *iommu) if (iommu_feature(iommu, FEATURE_GT)) { int glxval; - u32 pasids; - u64 shift; + u32 max_pasid; + u64 pasmax; - shift = iommu->features & FEATURE_PASID_MASK; - shift >>= FEATURE_PASID_SHIFT; - pasids = (1 << shift); + pasmax = iommu->features & FEATURE_PASID_MASK; + pasmax >>= FEATURE_PASID_SHIFT; + max_pasid = (1 << (pasmax + 1)) - 1; - amd_iommu_max_pasids = min(amd_iommu_max_pasids, pasids); + amd_iommu_max_pasid = min(amd_iommu_max_pasid, max_pasid); + + BUG_ON(amd_iommu_max_pasid & ~PASID_MASK); glxval = iommu->features & FEATURE_GLXVAL_MASK; glxval >>= FEATURE_GLXVAL_SHIFT; @@ -1145,6 +1266,8 @@ static int iommu_init_pci(struct amd_iommu *iommu) if (iommu->cap & (1UL << IOMMU_CAP_NPCACHE)) amd_iommu_np_cache = true; + init_iommu_perf_ctr(iommu); + if (is_rd890_iommu(iommu->dev)) { int i, j; @@ -1172,6 +1295,8 @@ static int iommu_init_pci(struct amd_iommu *iommu) iommu->stored_l2[i] = iommu_read_l2(iommu, i); } + amd_iommu_erratum_746_workaround(iommu); + return pci_enable_device(iommu->dev); } @@ -1195,7 +1320,7 @@ static void print_iommu_info(void) if (iommu_feature(iommu, (1ULL << i))) pr_cont(" %s", feat_str[i]); } - pr_cont("\n"); + pr_cont("\n"); } } if (irq_remapping_enabled) @@ -1241,7 +1366,7 @@ static int iommu_setup_msi(struct amd_iommu *iommu) amd_iommu_int_handler, amd_iommu_int_thread, 0, "AMD-Vi", - iommu->dev); + iommu); if (r) { pci_disable_msi(iommu->dev); @@ -1260,7 +1385,7 @@ static int iommu_init_msi(struct amd_iommu *iommu) if (iommu->int_enabled) goto enable_faults; - if (pci_find_capability(iommu->dev, PCI_CAP_ID_MSI)) + if (iommu->dev->msi_cap) ret = iommu_setup_msi(iommu); else ret = -ENODEV; @@ -1354,8 +1479,8 @@ static int __init init_unity_map_range(struct ivmd_header *m) DUMP_printk("%s devid_start: %02x:%02x.%x devid_end: %02x:%02x.%x" " range_start: %016llx range_end: %016llx flags: %x\n", s, - PCI_BUS(e->devid_start), PCI_SLOT(e->devid_start), - PCI_FUNC(e->devid_start), PCI_BUS(e->devid_end), + PCI_BUS_NUM(e->devid_start), PCI_SLOT(e->devid_start), + PCI_FUNC(e->devid_start), PCI_BUS_NUM(e->devid_end), PCI_SLOT(e->devid_end), PCI_FUNC(e->devid_end), e->address_start, e->address_end, m->flags); @@ -1604,18 +1729,28 @@ static void __init free_on_init_error(void) static bool __init check_ioapic_information(void) { + const char *fw_bug = FW_BUG; bool ret, has_sb_ioapic; int idx; has_sb_ioapic = false; ret = false; + /* + * If we have map overrides on the kernel command line the + * messages in this function might not describe firmware bugs + * anymore - so be careful + */ + if (cmdline_maps) + fw_bug = ""; + for (idx = 0; idx < nr_ioapics; idx++) { int devid, id = mpc_ioapic_id(idx); devid = get_ioapic_devid(id); if (devid < 0) { - pr_err(FW_BUG "AMD-Vi: IOAPIC[%d] not in IVRS table\n", id); + pr_err("%sAMD-Vi: IOAPIC[%d] not in IVRS table\n", + fw_bug, id); ret = false; } else if (devid == IOAPIC_SB_DEVID) { has_sb_ioapic = true; @@ -1632,11 +1767,11 @@ static bool __init check_ioapic_information(void) * when the BIOS is buggy and provides us the wrong * device id for the IOAPIC in the system. */ - pr_err(FW_BUG "AMD-Vi: No southbridge IOAPIC found in IVRS table\n"); + pr_err("%sAMD-Vi: No southbridge IOAPIC found\n", fw_bug); } if (!ret) - pr_err("AMD-Vi: Disabling interrupt remapping due to BIOS Bug(s)\n"); + pr_err("AMD-Vi: Disabling interrupt remapping\n"); return ret; } @@ -1767,6 +1902,7 @@ static int __init early_amd_iommu_init(void) * Interrupt remapping enabled, create kmem_cache for the * remapping tables. */ + ret = -ENOMEM; amd_iommu_irq_cache = kmem_cache_create("irq_remap_cache", MAX_IRQS_PER_TABLE * sizeof(u32), IRQ_TABLE_ALIGNMENT, @@ -1842,11 +1978,6 @@ static int amd_iommu_init_dma(void) struct amd_iommu *iommu; int ret; - init_device_table_dma(); - - for_each_iommu(iommu) - iommu_flush_all_caches(iommu); - if (iommu_pass_through) ret = amd_iommu_init_passthrough(); else @@ -1855,6 +1986,11 @@ static int amd_iommu_init_dma(void) if (ret) return ret; + init_device_table_dma(); + + for_each_iommu(iommu) + iommu_flush_all_caches(iommu); + amd_iommu_init_api(); amd_iommu_init_notifier(); @@ -2063,8 +2199,70 @@ static int __init parse_amd_iommu_options(char *str) return 1; } -__setup("amd_iommu_dump", parse_amd_iommu_dump); -__setup("amd_iommu=", parse_amd_iommu_options); +static int __init parse_ivrs_ioapic(char *str) +{ + unsigned int bus, dev, fn; + int ret, id, i; + u16 devid; + + ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn); + + if (ret != 4) { + pr_err("AMD-Vi: Invalid command line: ivrs_ioapic%s\n", str); + return 1; + } + + if (early_ioapic_map_size == EARLY_MAP_SIZE) { + pr_err("AMD-Vi: Early IOAPIC map overflow - ignoring ivrs_ioapic%s\n", + str); + return 1; + } + + devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7); + + cmdline_maps = true; + i = early_ioapic_map_size++; + early_ioapic_map[i].id = id; + early_ioapic_map[i].devid = devid; + early_ioapic_map[i].cmd_line = true; + + return 1; +} + +static int __init parse_ivrs_hpet(char *str) +{ + unsigned int bus, dev, fn; + int ret, id, i; + u16 devid; + + ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn); + + if (ret != 4) { + pr_err("AMD-Vi: Invalid command line: ivrs_hpet%s\n", str); + return 1; + } + + if (early_hpet_map_size == EARLY_MAP_SIZE) { + pr_err("AMD-Vi: Early HPET map overflow - ignoring ivrs_hpet%s\n", + str); + return 1; + } + + devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7); + + cmdline_maps = true; + i = early_hpet_map_size++; + early_hpet_map[i].id = id; + early_hpet_map[i].devid = devid; + early_hpet_map[i].cmd_line = true; + + return 1; +} + +__setup("amd_iommu_dump", parse_amd_iommu_dump); +__setup("amd_iommu=", parse_amd_iommu_options); +__setup("ivrs_ioapic", parse_ivrs_ioapic); +__setup("ivrs_hpet", parse_ivrs_hpet); IOMMU_INIT_FINISH(amd_iommu_detect, gart_iommu_hole_init, @@ -2076,3 +2274,84 @@ bool amd_iommu_v2_supported(void) return amd_iommu_v2_present; } EXPORT_SYMBOL(amd_iommu_v2_supported); + +/**************************************************************************** + * + * IOMMU EFR Performance Counter support functionality. This code allows + * access to the IOMMU PC functionality. + * + ****************************************************************************/ + +u8 amd_iommu_pc_get_max_banks(u16 devid) +{ + struct amd_iommu *iommu; + u8 ret = 0; + + /* locate the iommu governing the devid */ + iommu = amd_iommu_rlookup_table[devid]; + if (iommu) + ret = iommu->max_banks; + + return ret; +} +EXPORT_SYMBOL(amd_iommu_pc_get_max_banks); + +bool amd_iommu_pc_supported(void) +{ + return amd_iommu_pc_present; +} +EXPORT_SYMBOL(amd_iommu_pc_supported); + +u8 amd_iommu_pc_get_max_counters(u16 devid) +{ + struct amd_iommu *iommu; + u8 ret = 0; + + /* locate the iommu governing the devid */ + iommu = amd_iommu_rlookup_table[devid]; + if (iommu) + ret = iommu->max_counters; + + return ret; +} +EXPORT_SYMBOL(amd_iommu_pc_get_max_counters); + +int amd_iommu_pc_get_set_reg_val(u16 devid, u8 bank, u8 cntr, u8 fxn, + u64 *value, bool is_write) +{ + struct amd_iommu *iommu; + u32 offset; + u32 max_offset_lim; + + /* Make sure the IOMMU PC resource is available */ + if (!amd_iommu_pc_present) + return -ENODEV; + + /* Locate the iommu associated with the device ID */ + iommu = amd_iommu_rlookup_table[devid]; + + /* Check for valid iommu and pc register indexing */ + if (WARN_ON((iommu == NULL) || (fxn > 0x28) || (fxn & 7))) + return -ENODEV; + + offset = (u32)(((0x40|bank) << 12) | (cntr << 8) | fxn); + + /* Limit the offset to the hw defined mmio region aperture */ + max_offset_lim = (u32)(((0x40|iommu->max_banks) << 12) | + (iommu->max_counters << 8) | 0x28); + if ((offset < MMIO_CNTR_REG_OFFSET) || + (offset > max_offset_lim)) + return -EINVAL; + + if (is_write) { + writel((u32)*value, iommu->mmio_base + offset); + writel((*value >> 32), iommu->mmio_base + offset + 4); + } else { + *value = readl(iommu->mmio_base + offset + 4); + *value <<= 32; + *value = readl(iommu->mmio_base + offset); + } + + return 0; +} +EXPORT_SYMBOL(amd_iommu_pc_get_set_reg_val); diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h index c294961bdd3..95ed6deae47 100644 --- a/drivers/iommu/amd_iommu_proto.h +++ b/drivers/iommu/amd_iommu_proto.h @@ -56,6 +56,13 @@ extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid, extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid); extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev); +/* IOMMU Performance Counter functions */ +extern bool amd_iommu_pc_supported(void); +extern u8 amd_iommu_pc_get_max_banks(u16 devid); +extern u8 amd_iommu_pc_get_max_counters(u16 devid); +extern int amd_iommu_pc_get_set_reg_val(u16 devid, u8 bank, u8 cntr, u8 fxn, + u64 *value, bool is_write); + #define PPR_SUCCESS 0x0 #define PPR_INVALID 0x1 #define PPR_FAILURE 0xf diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index e38ab438bb3..f1a5abf11ac 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -24,6 +24,8 @@ #include <linux/mutex.h> #include <linux/list.h> #include <linux/spinlock.h> +#include <linux/pci.h> +#include <linux/irqreturn.h> /* * Maximum number of IOMMUs supported @@ -37,9 +39,6 @@ #define ALIAS_TABLE_ENTRY_SIZE 2 #define RLOOKUP_TABLE_ENTRY_SIZE (sizeof(void *)) -/* Length of the MMIO region for the AMD IOMMU */ -#define MMIO_REGION_LENGTH 0x4000 - /* Capability offsets used by the driver */ #define MMIO_CAP_HDR_OFFSET 0x00 #define MMIO_RANGE_OFFSET 0x0c @@ -77,6 +76,10 @@ #define MMIO_STATUS_OFFSET 0x2020 #define MMIO_PPR_HEAD_OFFSET 0x2030 #define MMIO_PPR_TAIL_OFFSET 0x2038 +#define MMIO_CNTR_CONF_OFFSET 0x4000 +#define MMIO_CNTR_REG_OFFSET 0x40000 +#define MMIO_REG_END_OFFSET 0x80000 + /* Extended Feature Bits */ @@ -96,9 +99,15 @@ #define FEATURE_GLXVAL_SHIFT 14 #define FEATURE_GLXVAL_MASK (0x03ULL << FEATURE_GLXVAL_SHIFT) -#define PASID_MASK 0x000fffff +/* Note: + * The current driver only support 16-bit PASID. + * Currently, hardware only implement upto 16-bit PASID + * even though the spec says it could have upto 20 bits. + */ +#define PASID_MASK 0x0000ffff /* MMIO status bits */ +#define MMIO_STATUS_EVT_INT_MASK (1 << 1) #define MMIO_STATUS_COM_WAIT_INT_MASK (1 << 2) #define MMIO_STATUS_PPR_INT_MASK (1 << 6) @@ -315,9 +324,6 @@ #define MAX_DOMAIN_ID 65536 -/* FIXME: move this macro to <linux/pci.h> */ -#define PCI_BUS(x) (((x) >> 8) & 0xff) - /* Protection domain flags */ #define PD_DMA_OPS_MASK (1UL << 0) /* domain used for dma_ops */ #define PD_DEFAULT_MASK (1UL << 1) /* domain is a default dma_ops @@ -508,6 +514,10 @@ struct amd_iommu { /* physical address of MMIO space */ u64 mmio_phys; + + /* physical end address of MMIO space */ + u64 mmio_phys_end; + /* virtual address of MMIO space */ u8 __iomem *mmio_base; @@ -585,12 +595,17 @@ struct amd_iommu { /* The l2 indirect registers */ u32 stored_l2[0x83]; + + /* The maximum PC banks and counters/bank (PCSup=1) */ + u8 max_banks; + u8 max_counters; }; struct devid_map { struct list_head list; u8 id; u16 devid; + bool cmd_line; }; /* Map HPET and IOAPIC ids to the devid used by the IOMMU */ @@ -687,8 +702,8 @@ extern unsigned long *amd_iommu_pd_alloc_bitmap; */ extern u32 amd_iommu_unmap_flush; -/* Smallest number of PASIDs supported by any IOMMU in the system */ -extern u32 amd_iommu_max_pasids; +/* Smallest max PASID supported by any IOMMU in the system */ +extern u32 amd_iommu_max_pasid; extern bool amd_iommu_v2_present; @@ -703,13 +718,6 @@ extern int amd_iommu_max_glx_val; */ extern void iommu_flush_all_caches(struct amd_iommu *iommu); -/* takes bus and device/function and returns the device id - * FIXME: should that be in generic PCI code? */ -static inline u16 calc_devid(u8 bus, u8 devfn) -{ - return (((u16)bus) << 8) | devfn; -} - static inline int get_ioapic_devid(int id) { struct devid_map *entry; diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c index 5208828792e..499b4366a98 100644 --- a/drivers/iommu/amd_iommu_v2.c +++ b/drivers/iommu/amd_iommu_v2.c @@ -45,17 +45,22 @@ struct pri_queue { struct pasid_state { struct list_head list; /* For global state-list */ atomic_t count; /* Reference count */ + unsigned mmu_notifier_count; /* Counting nested mmu_notifier + calls */ struct task_struct *task; /* Task bound to this PASID */ struct mm_struct *mm; /* mm_struct for the faults */ struct mmu_notifier mn; /* mmu_otifier handle */ struct pri_queue pri[PRI_QUEUE_SIZE]; /* PRI tag states */ struct device_state *device_state; /* Link to our device_state */ int pasid; /* PASID index */ - spinlock_t lock; /* Protect pri_queues */ + spinlock_t lock; /* Protect pri_queues and + mmu_notifer_count */ wait_queue_head_t wq; /* To wait for count == 0 */ }; struct device_state { + struct list_head list; + u16 devid; atomic_t count; struct pci_dev *pdev; struct pasid_state **states; @@ -81,13 +86,9 @@ struct fault { u16 flags; }; -static struct device_state **state_table; +static LIST_HEAD(state_list); static spinlock_t state_lock; -/* List and lock for all pasid_states */ -static LIST_HEAD(pasid_state_list); -static DEFINE_SPINLOCK(ps_lock); - static struct workqueue_struct *iommu_wq; /* @@ -99,7 +100,6 @@ static u64 *empty_page_table; static void free_pasid_states(struct device_state *dev_state); static void unbind_pasid(struct device_state *dev_state, int pasid); -static int task_exit(struct notifier_block *nb, unsigned long e, void *data); static u16 device_id(struct pci_dev *pdev) { @@ -111,13 +111,25 @@ static u16 device_id(struct pci_dev *pdev) return devid; } +static struct device_state *__get_device_state(u16 devid) +{ + struct device_state *dev_state; + + list_for_each_entry(dev_state, &state_list, list) { + if (dev_state->devid == devid) + return dev_state; + } + + return NULL; +} + static struct device_state *get_device_state(u16 devid) { struct device_state *dev_state; unsigned long flags; spin_lock_irqsave(&state_lock, flags); - dev_state = state_table[devid]; + dev_state = __get_device_state(devid); if (dev_state != NULL) atomic_inc(&dev_state->count); spin_unlock_irqrestore(&state_lock, flags); @@ -158,29 +170,6 @@ static void put_device_state_wait(struct device_state *dev_state) free_device_state(dev_state); } -static struct notifier_block profile_nb = { - .notifier_call = task_exit, -}; - -static void link_pasid_state(struct pasid_state *pasid_state) -{ - spin_lock(&ps_lock); - list_add_tail(&pasid_state->list, &pasid_state_list); - spin_unlock(&ps_lock); -} - -static void __unlink_pasid_state(struct pasid_state *pasid_state) -{ - list_del(&pasid_state->list); -} - -static void unlink_pasid_state(struct pasid_state *pasid_state) -{ - spin_lock(&ps_lock); - __unlink_pasid_state(pasid_state); - spin_unlock(&ps_lock); -} - /* Must be called under dev_state->lock */ static struct pasid_state **__get_pasid_state_ptr(struct device_state *dev_state, int pasid, bool alloc) @@ -337,7 +326,6 @@ static void unbind_pasid(struct device_state *dev_state, int pasid) if (pasid_state == NULL) return; - unlink_pasid_state(pasid_state); __unbind_pasid(pasid_state); put_pasid_state_wait(pasid_state); /* Reference taken in this function */ } @@ -379,7 +367,12 @@ static void free_pasid_states(struct device_state *dev_state) continue; put_pasid_state(pasid_state); - unbind_pasid(dev_state, i); + + /* + * This will call the mn_release function and + * unbind the PASID + */ + mmu_notifier_unregister(&pasid_state->mn, pasid_state->mm); } if (dev_state->pasid_levels == 2) @@ -439,12 +432,19 @@ static void mn_invalidate_range_start(struct mmu_notifier *mn, { struct pasid_state *pasid_state; struct device_state *dev_state; + unsigned long flags; pasid_state = mn_to_state(mn); dev_state = pasid_state->device_state; - amd_iommu_domain_set_gcr3(dev_state->domain, pasid_state->pasid, - __pa(empty_page_table)); + spin_lock_irqsave(&pasid_state->lock, flags); + if (pasid_state->mmu_notifier_count == 0) { + amd_iommu_domain_set_gcr3(dev_state->domain, + pasid_state->pasid, + __pa(empty_page_table)); + } + pasid_state->mmu_notifier_count += 1; + spin_unlock_irqrestore(&pasid_state->lock, flags); } static void mn_invalidate_range_end(struct mmu_notifier *mn, @@ -453,15 +453,39 @@ static void mn_invalidate_range_end(struct mmu_notifier *mn, { struct pasid_state *pasid_state; struct device_state *dev_state; + unsigned long flags; pasid_state = mn_to_state(mn); dev_state = pasid_state->device_state; - amd_iommu_domain_set_gcr3(dev_state->domain, pasid_state->pasid, - __pa(pasid_state->mm->pgd)); + spin_lock_irqsave(&pasid_state->lock, flags); + pasid_state->mmu_notifier_count -= 1; + if (pasid_state->mmu_notifier_count == 0) { + amd_iommu_domain_set_gcr3(dev_state->domain, + pasid_state->pasid, + __pa(pasid_state->mm->pgd)); + } + spin_unlock_irqrestore(&pasid_state->lock, flags); +} + +static void mn_release(struct mmu_notifier *mn, struct mm_struct *mm) +{ + struct pasid_state *pasid_state; + struct device_state *dev_state; + + might_sleep(); + + pasid_state = mn_to_state(mn); + dev_state = pasid_state->device_state; + + if (pasid_state->device_state->inv_ctx_cb) + dev_state->inv_ctx_cb(dev_state->pdev, pasid_state->pasid); + + unbind_pasid(dev_state, pasid_state->pasid); } static struct mmu_notifier_ops iommu_mn = { + .release = mn_release, .clear_flush_young = mn_clear_flush_young, .change_pte = mn_change_pte, .invalidate_page = mn_invalidate_page, @@ -504,8 +528,10 @@ static void do_fault(struct work_struct *work) write = !!(fault->flags & PPR_FAULT_WRITE); + down_read(&fault->state->mm->mmap_sem); npages = get_user_pages(fault->state->task, fault->state->mm, fault->address, 1, write, 0, &page, NULL); + up_read(&fault->state->mm->mmap_sem); if (npages == 1) { put_page(page); @@ -604,53 +630,6 @@ static struct notifier_block ppr_nb = { .notifier_call = ppr_notifier, }; -static int task_exit(struct notifier_block *nb, unsigned long e, void *data) -{ - struct pasid_state *pasid_state; - struct task_struct *task; - - task = data; - - /* - * Using this notifier is a hack - but there is no other choice - * at the moment. What I really want is a sleeping notifier that - * is called when an MM goes down. But such a notifier doesn't - * exist yet. The notifier needs to sleep because it has to make - * sure that the device does not use the PASID and the address - * space anymore before it is destroyed. This includes waiting - * for pending PRI requests to pass the workqueue. The - * MMU-Notifiers would be a good fit, but they use RCU and so - * they are not allowed to sleep. Lets see how we can solve this - * in a more intelligent way in the future. - */ -again: - spin_lock(&ps_lock); - list_for_each_entry(pasid_state, &pasid_state_list, list) { - struct device_state *dev_state; - int pasid; - - if (pasid_state->task != task) - continue; - - /* Drop Lock and unbind */ - spin_unlock(&ps_lock); - - dev_state = pasid_state->device_state; - pasid = pasid_state->pasid; - - if (pasid_state->device_state->inv_ctx_cb) - dev_state->inv_ctx_cb(dev_state->pdev, pasid); - - unbind_pasid(dev_state, pasid); - - /* Task may be in the list multiple times */ - goto again; - } - spin_unlock(&ps_lock); - - return NOTIFY_OK; -} - int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid, struct task_struct *task) { @@ -703,8 +682,6 @@ int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid, if (ret) goto out_clear_state; - link_pasid_state(pasid_state); - return 0; out_clear_state: @@ -725,6 +702,7 @@ EXPORT_SYMBOL(amd_iommu_bind_pasid); void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid) { + struct pasid_state *pasid_state; struct device_state *dev_state; u16 devid; @@ -741,7 +719,17 @@ void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid) if (pasid < 0 || pasid >= dev_state->max_pasids) goto out; - unbind_pasid(dev_state, pasid); + pasid_state = get_pasid_state(dev_state, pasid); + if (pasid_state == NULL) + goto out; + /* + * Drop reference taken here. We are safe because we still hold + * the reference taken in the amd_iommu_bind_pasid function. + */ + put_pasid_state(pasid_state); + + /* This will call the mn_release function and unbind the PASID */ + mmu_notifier_unregister(&pasid_state->mn, pasid_state->mm); out: put_device_state(dev_state); @@ -771,7 +759,8 @@ int amd_iommu_init_device(struct pci_dev *pdev, int pasids) spin_lock_init(&dev_state->lock); init_waitqueue_head(&dev_state->wq); - dev_state->pdev = pdev; + dev_state->pdev = pdev; + dev_state->devid = devid; tmp = pasids; for (dev_state->pasid_levels = 0; (tmp - 1) & ~0x1ff; tmp >>= 9) @@ -801,13 +790,13 @@ int amd_iommu_init_device(struct pci_dev *pdev, int pasids) spin_lock_irqsave(&state_lock, flags); - if (state_table[devid] != NULL) { + if (__get_device_state(devid) != NULL) { spin_unlock_irqrestore(&state_lock, flags); ret = -EBUSY; goto out_free_domain; } - state_table[devid] = dev_state; + list_add_tail(&dev_state->list, &state_list); spin_unlock_irqrestore(&state_lock, flags); @@ -839,13 +828,13 @@ void amd_iommu_free_device(struct pci_dev *pdev) spin_lock_irqsave(&state_lock, flags); - dev_state = state_table[devid]; + dev_state = __get_device_state(devid); if (dev_state == NULL) { spin_unlock_irqrestore(&state_lock, flags); return; } - state_table[devid] = NULL; + list_del(&dev_state->list); spin_unlock_irqrestore(&state_lock, flags); @@ -872,7 +861,7 @@ int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev, spin_lock_irqsave(&state_lock, flags); ret = -EINVAL; - dev_state = state_table[devid]; + dev_state = __get_device_state(devid); if (dev_state == NULL) goto out_unlock; @@ -903,7 +892,7 @@ int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev, spin_lock_irqsave(&state_lock, flags); ret = -EINVAL; - dev_state = state_table[devid]; + dev_state = __get_device_state(devid); if (dev_state == NULL) goto out_unlock; @@ -920,7 +909,6 @@ EXPORT_SYMBOL(amd_iommu_set_invalidate_ctx_cb); static int __init amd_iommu_v2_init(void) { - size_t state_table_size; int ret; pr_info("AMD IOMMUv2 driver by Joerg Roedel <joerg.roedel@amd.com>\n"); @@ -936,16 +924,10 @@ static int __init amd_iommu_v2_init(void) spin_lock_init(&state_lock); - state_table_size = MAX_DEVICES * sizeof(struct device_state *); - state_table = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, - get_order(state_table_size)); - if (state_table == NULL) - return -ENOMEM; - ret = -ENOMEM; iommu_wq = create_workqueue("amd_iommu_v2"); if (iommu_wq == NULL) - goto out_free; + goto out; ret = -ENOMEM; empty_page_table = (u64 *)get_zeroed_page(GFP_KERNEL); @@ -953,29 +935,24 @@ static int __init amd_iommu_v2_init(void) goto out_destroy_wq; amd_iommu_register_ppr_notifier(&ppr_nb); - profile_event_register(PROFILE_TASK_EXIT, &profile_nb); return 0; out_destroy_wq: destroy_workqueue(iommu_wq); -out_free: - free_pages((unsigned long)state_table, get_order(state_table_size)); - +out: return ret; } static void __exit amd_iommu_v2_exit(void) { struct device_state *dev_state; - size_t state_table_size; int i; if (!amd_iommu_v2_supported()) return; - profile_event_unregister(PROFILE_TASK_EXIT, &profile_nb); amd_iommu_unregister_ppr_notifier(&ppr_nb); flush_workqueue(iommu_wq); @@ -998,9 +975,6 @@ static void __exit amd_iommu_v2_exit(void) destroy_workqueue(iommu_wq); - state_table_size = MAX_DEVICES * sizeof(struct device_state *); - free_pages((unsigned long)state_table, get_order(state_table_size)); - free_page((unsigned long)empty_page_table); } diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c new file mode 100644 index 00000000000..1599354e974 --- /dev/null +++ b/drivers/iommu/arm-smmu.c @@ -0,0 +1,2064 @@ +/* + * IOMMU API for ARM architected SMMU implementations. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) 2013 ARM Limited + * + * Author: Will Deacon <will.deacon@arm.com> + * + * This driver currently supports: + * - SMMUv1 and v2 implementations + * - Stream-matching and stream-indexing + * - v7/v8 long-descriptor format + * - Non-secure access to the SMMU + * - 4k and 64k pages, with contiguous pte hints. + * - Up to 42-bit addressing (dependent on VA_BITS) + * - Context fault reporting + */ + +#define pr_fmt(fmt) "arm-smmu: " fmt + +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/iommu.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +#include <linux/amba/bus.h> + +#include <asm/pgalloc.h> + +/* Maximum number of stream IDs assigned to a single device */ +#define MAX_MASTER_STREAMIDS MAX_PHANDLE_ARGS + +/* Maximum number of context banks per SMMU */ +#define ARM_SMMU_MAX_CBS 128 + +/* Maximum number of mapping groups per SMMU */ +#define ARM_SMMU_MAX_SMRS 128 + +/* SMMU global address space */ +#define ARM_SMMU_GR0(smmu) ((smmu)->base) +#define ARM_SMMU_GR1(smmu) ((smmu)->base + (smmu)->pagesize) + +/* + * SMMU global address space with conditional offset to access secure + * aliases of non-secure registers (e.g. nsCR0: 0x400, nsGFSR: 0x448, + * nsGFSYNR0: 0x450) + */ +#define ARM_SMMU_GR0_NS(smmu) \ + ((smmu)->base + \ + ((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) \ + ? 0x400 : 0)) + +/* Page table bits */ +#define ARM_SMMU_PTE_XN (((pteval_t)3) << 53) +#define ARM_SMMU_PTE_CONT (((pteval_t)1) << 52) +#define ARM_SMMU_PTE_AF (((pteval_t)1) << 10) +#define ARM_SMMU_PTE_SH_NS (((pteval_t)0) << 8) +#define ARM_SMMU_PTE_SH_OS (((pteval_t)2) << 8) +#define ARM_SMMU_PTE_SH_IS (((pteval_t)3) << 8) +#define ARM_SMMU_PTE_PAGE (((pteval_t)3) << 0) + +#if PAGE_SIZE == SZ_4K +#define ARM_SMMU_PTE_CONT_ENTRIES 16 +#elif PAGE_SIZE == SZ_64K +#define ARM_SMMU_PTE_CONT_ENTRIES 32 +#else +#define ARM_SMMU_PTE_CONT_ENTRIES 1 +#endif + +#define ARM_SMMU_PTE_CONT_SIZE (PAGE_SIZE * ARM_SMMU_PTE_CONT_ENTRIES) +#define ARM_SMMU_PTE_CONT_MASK (~(ARM_SMMU_PTE_CONT_SIZE - 1)) + +/* Stage-1 PTE */ +#define ARM_SMMU_PTE_AP_UNPRIV (((pteval_t)1) << 6) +#define ARM_SMMU_PTE_AP_RDONLY (((pteval_t)2) << 6) +#define ARM_SMMU_PTE_ATTRINDX_SHIFT 2 +#define ARM_SMMU_PTE_nG (((pteval_t)1) << 11) + +/* Stage-2 PTE */ +#define ARM_SMMU_PTE_HAP_FAULT (((pteval_t)0) << 6) +#define ARM_SMMU_PTE_HAP_READ (((pteval_t)1) << 6) +#define ARM_SMMU_PTE_HAP_WRITE (((pteval_t)2) << 6) +#define ARM_SMMU_PTE_MEMATTR_OIWB (((pteval_t)0xf) << 2) +#define ARM_SMMU_PTE_MEMATTR_NC (((pteval_t)0x5) << 2) +#define ARM_SMMU_PTE_MEMATTR_DEV (((pteval_t)0x1) << 2) + +/* Configuration registers */ +#define ARM_SMMU_GR0_sCR0 0x0 +#define sCR0_CLIENTPD (1 << 0) +#define sCR0_GFRE (1 << 1) +#define sCR0_GFIE (1 << 2) +#define sCR0_GCFGFRE (1 << 4) +#define sCR0_GCFGFIE (1 << 5) +#define sCR0_USFCFG (1 << 10) +#define sCR0_VMIDPNE (1 << 11) +#define sCR0_PTM (1 << 12) +#define sCR0_FB (1 << 13) +#define sCR0_BSU_SHIFT 14 +#define sCR0_BSU_MASK 0x3 + +/* Identification registers */ +#define ARM_SMMU_GR0_ID0 0x20 +#define ARM_SMMU_GR0_ID1 0x24 +#define ARM_SMMU_GR0_ID2 0x28 +#define ARM_SMMU_GR0_ID3 0x2c +#define ARM_SMMU_GR0_ID4 0x30 +#define ARM_SMMU_GR0_ID5 0x34 +#define ARM_SMMU_GR0_ID6 0x38 +#define ARM_SMMU_GR0_ID7 0x3c +#define ARM_SMMU_GR0_sGFSR 0x48 +#define ARM_SMMU_GR0_sGFSYNR0 0x50 +#define ARM_SMMU_GR0_sGFSYNR1 0x54 +#define ARM_SMMU_GR0_sGFSYNR2 0x58 +#define ARM_SMMU_GR0_PIDR0 0xfe0 +#define ARM_SMMU_GR0_PIDR1 0xfe4 +#define ARM_SMMU_GR0_PIDR2 0xfe8 + +#define ID0_S1TS (1 << 30) +#define ID0_S2TS (1 << 29) +#define ID0_NTS (1 << 28) +#define ID0_SMS (1 << 27) +#define ID0_PTFS_SHIFT 24 +#define ID0_PTFS_MASK 0x2 +#define ID0_PTFS_V8_ONLY 0x2 +#define ID0_CTTW (1 << 14) +#define ID0_NUMIRPT_SHIFT 16 +#define ID0_NUMIRPT_MASK 0xff +#define ID0_NUMSMRG_SHIFT 0 +#define ID0_NUMSMRG_MASK 0xff + +#define ID1_PAGESIZE (1 << 31) +#define ID1_NUMPAGENDXB_SHIFT 28 +#define ID1_NUMPAGENDXB_MASK 7 +#define ID1_NUMS2CB_SHIFT 16 +#define ID1_NUMS2CB_MASK 0xff +#define ID1_NUMCB_SHIFT 0 +#define ID1_NUMCB_MASK 0xff + +#define ID2_OAS_SHIFT 4 +#define ID2_OAS_MASK 0xf +#define ID2_IAS_SHIFT 0 +#define ID2_IAS_MASK 0xf +#define ID2_UBS_SHIFT 8 +#define ID2_UBS_MASK 0xf +#define ID2_PTFS_4K (1 << 12) +#define ID2_PTFS_16K (1 << 13) +#define ID2_PTFS_64K (1 << 14) + +#define PIDR2_ARCH_SHIFT 4 +#define PIDR2_ARCH_MASK 0xf + +/* Global TLB invalidation */ +#define ARM_SMMU_GR0_STLBIALL 0x60 +#define ARM_SMMU_GR0_TLBIVMID 0x64 +#define ARM_SMMU_GR0_TLBIALLNSNH 0x68 +#define ARM_SMMU_GR0_TLBIALLH 0x6c +#define ARM_SMMU_GR0_sTLBGSYNC 0x70 +#define ARM_SMMU_GR0_sTLBGSTATUS 0x74 +#define sTLBGSTATUS_GSACTIVE (1 << 0) +#define TLB_LOOP_TIMEOUT 1000000 /* 1s! */ + +/* Stream mapping registers */ +#define ARM_SMMU_GR0_SMR(n) (0x800 + ((n) << 2)) +#define SMR_VALID (1 << 31) +#define SMR_MASK_SHIFT 16 +#define SMR_MASK_MASK 0x7fff +#define SMR_ID_SHIFT 0 +#define SMR_ID_MASK 0x7fff + +#define ARM_SMMU_GR0_S2CR(n) (0xc00 + ((n) << 2)) +#define S2CR_CBNDX_SHIFT 0 +#define S2CR_CBNDX_MASK 0xff +#define S2CR_TYPE_SHIFT 16 +#define S2CR_TYPE_MASK 0x3 +#define S2CR_TYPE_TRANS (0 << S2CR_TYPE_SHIFT) +#define S2CR_TYPE_BYPASS (1 << S2CR_TYPE_SHIFT) +#define S2CR_TYPE_FAULT (2 << S2CR_TYPE_SHIFT) + +/* Context bank attribute registers */ +#define ARM_SMMU_GR1_CBAR(n) (0x0 + ((n) << 2)) +#define CBAR_VMID_SHIFT 0 +#define CBAR_VMID_MASK 0xff +#define CBAR_S1_BPSHCFG_SHIFT 8 +#define CBAR_S1_BPSHCFG_MASK 3 +#define CBAR_S1_BPSHCFG_NSH 3 +#define CBAR_S1_MEMATTR_SHIFT 12 +#define CBAR_S1_MEMATTR_MASK 0xf +#define CBAR_S1_MEMATTR_WB 0xf +#define CBAR_TYPE_SHIFT 16 +#define CBAR_TYPE_MASK 0x3 +#define CBAR_TYPE_S2_TRANS (0 << CBAR_TYPE_SHIFT) +#define CBAR_TYPE_S1_TRANS_S2_BYPASS (1 << CBAR_TYPE_SHIFT) +#define CBAR_TYPE_S1_TRANS_S2_FAULT (2 << CBAR_TYPE_SHIFT) +#define CBAR_TYPE_S1_TRANS_S2_TRANS (3 << CBAR_TYPE_SHIFT) +#define CBAR_IRPTNDX_SHIFT 24 +#define CBAR_IRPTNDX_MASK 0xff + +#define ARM_SMMU_GR1_CBA2R(n) (0x800 + ((n) << 2)) +#define CBA2R_RW64_32BIT (0 << 0) +#define CBA2R_RW64_64BIT (1 << 0) + +/* Translation context bank */ +#define ARM_SMMU_CB_BASE(smmu) ((smmu)->base + ((smmu)->size >> 1)) +#define ARM_SMMU_CB(smmu, n) ((n) * (smmu)->pagesize) + +#define ARM_SMMU_CB_SCTLR 0x0 +#define ARM_SMMU_CB_RESUME 0x8 +#define ARM_SMMU_CB_TTBCR2 0x10 +#define ARM_SMMU_CB_TTBR0_LO 0x20 +#define ARM_SMMU_CB_TTBR0_HI 0x24 +#define ARM_SMMU_CB_TTBCR 0x30 +#define ARM_SMMU_CB_S1_MAIR0 0x38 +#define ARM_SMMU_CB_FSR 0x58 +#define ARM_SMMU_CB_FAR_LO 0x60 +#define ARM_SMMU_CB_FAR_HI 0x64 +#define ARM_SMMU_CB_FSYNR0 0x68 +#define ARM_SMMU_CB_S1_TLBIASID 0x610 + +#define SCTLR_S1_ASIDPNE (1 << 12) +#define SCTLR_CFCFG (1 << 7) +#define SCTLR_CFIE (1 << 6) +#define SCTLR_CFRE (1 << 5) +#define SCTLR_E (1 << 4) +#define SCTLR_AFE (1 << 2) +#define SCTLR_TRE (1 << 1) +#define SCTLR_M (1 << 0) +#define SCTLR_EAE_SBOP (SCTLR_AFE | SCTLR_TRE) + +#define RESUME_RETRY (0 << 0) +#define RESUME_TERMINATE (1 << 0) + +#define TTBCR_EAE (1 << 31) + +#define TTBCR_PASIZE_SHIFT 16 +#define TTBCR_PASIZE_MASK 0x7 + +#define TTBCR_TG0_4K (0 << 14) +#define TTBCR_TG0_64K (1 << 14) + +#define TTBCR_SH0_SHIFT 12 +#define TTBCR_SH0_MASK 0x3 +#define TTBCR_SH_NS 0 +#define TTBCR_SH_OS 2 +#define TTBCR_SH_IS 3 + +#define TTBCR_ORGN0_SHIFT 10 +#define TTBCR_IRGN0_SHIFT 8 +#define TTBCR_RGN_MASK 0x3 +#define TTBCR_RGN_NC 0 +#define TTBCR_RGN_WBWA 1 +#define TTBCR_RGN_WT 2 +#define TTBCR_RGN_WB 3 + +#define TTBCR_SL0_SHIFT 6 +#define TTBCR_SL0_MASK 0x3 +#define TTBCR_SL0_LVL_2 0 +#define TTBCR_SL0_LVL_1 1 + +#define TTBCR_T1SZ_SHIFT 16 +#define TTBCR_T0SZ_SHIFT 0 +#define TTBCR_SZ_MASK 0xf + +#define TTBCR2_SEP_SHIFT 15 +#define TTBCR2_SEP_MASK 0x7 + +#define TTBCR2_PASIZE_SHIFT 0 +#define TTBCR2_PASIZE_MASK 0x7 + +/* Common definitions for PASize and SEP fields */ +#define TTBCR2_ADDR_32 0 +#define TTBCR2_ADDR_36 1 +#define TTBCR2_ADDR_40 2 +#define TTBCR2_ADDR_42 3 +#define TTBCR2_ADDR_44 4 +#define TTBCR2_ADDR_48 5 + +#define TTBRn_HI_ASID_SHIFT 16 + +#define MAIR_ATTR_SHIFT(n) ((n) << 3) +#define MAIR_ATTR_MASK 0xff +#define MAIR_ATTR_DEVICE 0x04 +#define MAIR_ATTR_NC 0x44 +#define MAIR_ATTR_WBRWA 0xff +#define MAIR_ATTR_IDX_NC 0 +#define MAIR_ATTR_IDX_CACHE 1 +#define MAIR_ATTR_IDX_DEV 2 + +#define FSR_MULTI (1 << 31) +#define FSR_SS (1 << 30) +#define FSR_UUT (1 << 8) +#define FSR_ASF (1 << 7) +#define FSR_TLBLKF (1 << 6) +#define FSR_TLBMCF (1 << 5) +#define FSR_EF (1 << 4) +#define FSR_PF (1 << 3) +#define FSR_AFF (1 << 2) +#define FSR_TF (1 << 1) + +#define FSR_IGN (FSR_AFF | FSR_ASF | FSR_TLBMCF | \ + FSR_TLBLKF) +#define FSR_FAULT (FSR_MULTI | FSR_SS | FSR_UUT | \ + FSR_EF | FSR_PF | FSR_TF | FSR_IGN) + +#define FSYNR0_WNR (1 << 4) + +struct arm_smmu_smr { + u8 idx; + u16 mask; + u16 id; +}; + +struct arm_smmu_master { + struct device_node *of_node; + + /* + * The following is specific to the master's position in the + * SMMU chain. + */ + struct rb_node node; + int num_streamids; + u16 streamids[MAX_MASTER_STREAMIDS]; + + /* + * We only need to allocate these on the root SMMU, as we + * configure unmatched streams to bypass translation. + */ + struct arm_smmu_smr *smrs; +}; + +struct arm_smmu_device { + struct device *dev; + struct device_node *parent_of_node; + + void __iomem *base; + unsigned long size; + unsigned long pagesize; + +#define ARM_SMMU_FEAT_COHERENT_WALK (1 << 0) +#define ARM_SMMU_FEAT_STREAM_MATCH (1 << 1) +#define ARM_SMMU_FEAT_TRANS_S1 (1 << 2) +#define ARM_SMMU_FEAT_TRANS_S2 (1 << 3) +#define ARM_SMMU_FEAT_TRANS_NESTED (1 << 4) + u32 features; + +#define ARM_SMMU_OPT_SECURE_CFG_ACCESS (1 << 0) + u32 options; + int version; + + u32 num_context_banks; + u32 num_s2_context_banks; + DECLARE_BITMAP(context_map, ARM_SMMU_MAX_CBS); + atomic_t irptndx; + + u32 num_mapping_groups; + DECLARE_BITMAP(smr_map, ARM_SMMU_MAX_SMRS); + + unsigned long input_size; + unsigned long s1_output_size; + unsigned long s2_output_size; + + u32 num_global_irqs; + u32 num_context_irqs; + unsigned int *irqs; + + struct list_head list; + struct rb_root masters; +}; + +struct arm_smmu_cfg { + struct arm_smmu_device *smmu; + u8 cbndx; + u8 irptndx; + u32 cbar; + pgd_t *pgd; +}; +#define INVALID_IRPTNDX 0xff + +#define ARM_SMMU_CB_ASID(cfg) ((cfg)->cbndx) +#define ARM_SMMU_CB_VMID(cfg) ((cfg)->cbndx + 1) + +struct arm_smmu_domain { + /* + * A domain can span across multiple, chained SMMUs and requires + * all devices within the domain to follow the same translation + * path. + */ + struct arm_smmu_device *leaf_smmu; + struct arm_smmu_cfg root_cfg; + phys_addr_t output_mask; + + spinlock_t lock; +}; + +static DEFINE_SPINLOCK(arm_smmu_devices_lock); +static LIST_HEAD(arm_smmu_devices); + +struct arm_smmu_option_prop { + u32 opt; + const char *prop; +}; + +static struct arm_smmu_option_prop arm_smmu_options [] = { + { ARM_SMMU_OPT_SECURE_CFG_ACCESS, "calxeda,smmu-secure-config-access" }, + { 0, NULL}, +}; + +static void parse_driver_options(struct arm_smmu_device *smmu) +{ + int i = 0; + do { + if (of_property_read_bool(smmu->dev->of_node, + arm_smmu_options[i].prop)) { + smmu->options |= arm_smmu_options[i].opt; + dev_notice(smmu->dev, "option %s\n", + arm_smmu_options[i].prop); + } + } while (arm_smmu_options[++i].opt); +} + +static struct arm_smmu_master *find_smmu_master(struct arm_smmu_device *smmu, + struct device_node *dev_node) +{ + struct rb_node *node = smmu->masters.rb_node; + + while (node) { + struct arm_smmu_master *master; + master = container_of(node, struct arm_smmu_master, node); + + if (dev_node < master->of_node) + node = node->rb_left; + else if (dev_node > master->of_node) + node = node->rb_right; + else + return master; + } + + return NULL; +} + +static int insert_smmu_master(struct arm_smmu_device *smmu, + struct arm_smmu_master *master) +{ + struct rb_node **new, *parent; + + new = &smmu->masters.rb_node; + parent = NULL; + while (*new) { + struct arm_smmu_master *this; + this = container_of(*new, struct arm_smmu_master, node); + + parent = *new; + if (master->of_node < this->of_node) + new = &((*new)->rb_left); + else if (master->of_node > this->of_node) + new = &((*new)->rb_right); + else + return -EEXIST; + } + + rb_link_node(&master->node, parent, new); + rb_insert_color(&master->node, &smmu->masters); + return 0; +} + +static int register_smmu_master(struct arm_smmu_device *smmu, + struct device *dev, + struct of_phandle_args *masterspec) +{ + int i; + struct arm_smmu_master *master; + + master = find_smmu_master(smmu, masterspec->np); + if (master) { + dev_err(dev, + "rejecting multiple registrations for master device %s\n", + masterspec->np->name); + return -EBUSY; + } + + if (masterspec->args_count > MAX_MASTER_STREAMIDS) { + dev_err(dev, + "reached maximum number (%d) of stream IDs for master device %s\n", + MAX_MASTER_STREAMIDS, masterspec->np->name); + return -ENOSPC; + } + + master = devm_kzalloc(dev, sizeof(*master), GFP_KERNEL); + if (!master) + return -ENOMEM; + + master->of_node = masterspec->np; + master->num_streamids = masterspec->args_count; + + for (i = 0; i < master->num_streamids; ++i) + master->streamids[i] = masterspec->args[i]; + + return insert_smmu_master(smmu, master); +} + +static struct arm_smmu_device *find_parent_smmu(struct arm_smmu_device *smmu) +{ + struct arm_smmu_device *parent; + + if (!smmu->parent_of_node) + return NULL; + + spin_lock(&arm_smmu_devices_lock); + list_for_each_entry(parent, &arm_smmu_devices, list) + if (parent->dev->of_node == smmu->parent_of_node) + goto out_unlock; + + parent = NULL; + dev_warn(smmu->dev, + "Failed to find SMMU parent despite parent in DT\n"); +out_unlock: + spin_unlock(&arm_smmu_devices_lock); + return parent; +} + +static int __arm_smmu_alloc_bitmap(unsigned long *map, int start, int end) +{ + int idx; + + do { + idx = find_next_zero_bit(map, end, start); + if (idx == end) + return -ENOSPC; + } while (test_and_set_bit(idx, map)); + + return idx; +} + +static void __arm_smmu_free_bitmap(unsigned long *map, int idx) +{ + clear_bit(idx, map); +} + +/* Wait for any pending TLB invalidations to complete */ +static void arm_smmu_tlb_sync(struct arm_smmu_device *smmu) +{ + int count = 0; + void __iomem *gr0_base = ARM_SMMU_GR0(smmu); + + writel_relaxed(0, gr0_base + ARM_SMMU_GR0_sTLBGSYNC); + while (readl_relaxed(gr0_base + ARM_SMMU_GR0_sTLBGSTATUS) + & sTLBGSTATUS_GSACTIVE) { + cpu_relax(); + if (++count == TLB_LOOP_TIMEOUT) { + dev_err_ratelimited(smmu->dev, + "TLB sync timed out -- SMMU may be deadlocked\n"); + return; + } + udelay(1); + } +} + +static void arm_smmu_tlb_inv_context(struct arm_smmu_cfg *cfg) +{ + struct arm_smmu_device *smmu = cfg->smmu; + void __iomem *base = ARM_SMMU_GR0(smmu); + bool stage1 = cfg->cbar != CBAR_TYPE_S2_TRANS; + + if (stage1) { + base = ARM_SMMU_CB_BASE(smmu) + ARM_SMMU_CB(smmu, cfg->cbndx); + writel_relaxed(ARM_SMMU_CB_ASID(cfg), + base + ARM_SMMU_CB_S1_TLBIASID); + } else { + base = ARM_SMMU_GR0(smmu); + writel_relaxed(ARM_SMMU_CB_VMID(cfg), + base + ARM_SMMU_GR0_TLBIVMID); + } + + arm_smmu_tlb_sync(smmu); +} + +static irqreturn_t arm_smmu_context_fault(int irq, void *dev) +{ + int flags, ret; + u32 fsr, far, fsynr, resume; + unsigned long iova; + struct iommu_domain *domain = dev; + struct arm_smmu_domain *smmu_domain = domain->priv; + struct arm_smmu_cfg *root_cfg = &smmu_domain->root_cfg; + struct arm_smmu_device *smmu = root_cfg->smmu; + void __iomem *cb_base; + + cb_base = ARM_SMMU_CB_BASE(smmu) + ARM_SMMU_CB(smmu, root_cfg->cbndx); + fsr = readl_relaxed(cb_base + ARM_SMMU_CB_FSR); + + if (!(fsr & FSR_FAULT)) + return IRQ_NONE; + + if (fsr & FSR_IGN) + dev_err_ratelimited(smmu->dev, + "Unexpected context fault (fsr 0x%u)\n", + fsr); + + fsynr = readl_relaxed(cb_base + ARM_SMMU_CB_FSYNR0); + flags = fsynr & FSYNR0_WNR ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ; + + far = readl_relaxed(cb_base + ARM_SMMU_CB_FAR_LO); + iova = far; +#ifdef CONFIG_64BIT + far = readl_relaxed(cb_base + ARM_SMMU_CB_FAR_HI); + iova |= ((unsigned long)far << 32); +#endif + + if (!report_iommu_fault(domain, smmu->dev, iova, flags)) { + ret = IRQ_HANDLED; + resume = RESUME_RETRY; + } else { + dev_err_ratelimited(smmu->dev, + "Unhandled context fault: iova=0x%08lx, fsynr=0x%x, cb=%d\n", + iova, fsynr, root_cfg->cbndx); + ret = IRQ_NONE; + resume = RESUME_TERMINATE; + } + + /* Clear the faulting FSR */ + writel(fsr, cb_base + ARM_SMMU_CB_FSR); + + /* Retry or terminate any stalled transactions */ + if (fsr & FSR_SS) + writel_relaxed(resume, cb_base + ARM_SMMU_CB_RESUME); + + return ret; +} + +static irqreturn_t arm_smmu_global_fault(int irq, void *dev) +{ + u32 gfsr, gfsynr0, gfsynr1, gfsynr2; + struct arm_smmu_device *smmu = dev; + void __iomem *gr0_base = ARM_SMMU_GR0_NS(smmu); + + gfsr = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSR); + gfsynr0 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR0); + gfsynr1 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR1); + gfsynr2 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR2); + + if (!gfsr) + return IRQ_NONE; + + dev_err_ratelimited(smmu->dev, + "Unexpected global fault, this could be serious\n"); + dev_err_ratelimited(smmu->dev, + "\tGFSR 0x%08x, GFSYNR0 0x%08x, GFSYNR1 0x%08x, GFSYNR2 0x%08x\n", + gfsr, gfsynr0, gfsynr1, gfsynr2); + + writel(gfsr, gr0_base + ARM_SMMU_GR0_sGFSR); + return IRQ_HANDLED; +} + +static void arm_smmu_flush_pgtable(struct arm_smmu_device *smmu, void *addr, + size_t size) +{ + unsigned long offset = (unsigned long)addr & ~PAGE_MASK; + + + /* Ensure new page tables are visible to the hardware walker */ + if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) { + dsb(ishst); + } else { + /* + * If the SMMU can't walk tables in the CPU caches, treat them + * like non-coherent DMA since we need to flush the new entries + * all the way out to memory. There's no possibility of + * recursion here as the SMMU table walker will not be wired + * through another SMMU. + */ + dma_map_page(smmu->dev, virt_to_page(addr), offset, size, + DMA_TO_DEVICE); + } +} + +static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain) +{ + u32 reg; + bool stage1; + struct arm_smmu_cfg *root_cfg = &smmu_domain->root_cfg; + struct arm_smmu_device *smmu = root_cfg->smmu; + void __iomem *cb_base, *gr0_base, *gr1_base; + + gr0_base = ARM_SMMU_GR0(smmu); + gr1_base = ARM_SMMU_GR1(smmu); + stage1 = root_cfg->cbar != CBAR_TYPE_S2_TRANS; + cb_base = ARM_SMMU_CB_BASE(smmu) + ARM_SMMU_CB(smmu, root_cfg->cbndx); + + /* CBAR */ + reg = root_cfg->cbar; + if (smmu->version == 1) + reg |= root_cfg->irptndx << CBAR_IRPTNDX_SHIFT; + + /* + * Use the weakest shareability/memory types, so they are + * overridden by the ttbcr/pte. + */ + if (stage1) { + reg |= (CBAR_S1_BPSHCFG_NSH << CBAR_S1_BPSHCFG_SHIFT) | + (CBAR_S1_MEMATTR_WB << CBAR_S1_MEMATTR_SHIFT); + } else { + reg |= ARM_SMMU_CB_VMID(root_cfg) << CBAR_VMID_SHIFT; + } + writel_relaxed(reg, gr1_base + ARM_SMMU_GR1_CBAR(root_cfg->cbndx)); + + if (smmu->version > 1) { + /* CBA2R */ +#ifdef CONFIG_64BIT + reg = CBA2R_RW64_64BIT; +#else + reg = CBA2R_RW64_32BIT; +#endif + writel_relaxed(reg, + gr1_base + ARM_SMMU_GR1_CBA2R(root_cfg->cbndx)); + + /* TTBCR2 */ + switch (smmu->input_size) { + case 32: + reg = (TTBCR2_ADDR_32 << TTBCR2_SEP_SHIFT); + break; + case 36: + reg = (TTBCR2_ADDR_36 << TTBCR2_SEP_SHIFT); + break; + case 39: + reg = (TTBCR2_ADDR_40 << TTBCR2_SEP_SHIFT); + break; + case 42: + reg = (TTBCR2_ADDR_42 << TTBCR2_SEP_SHIFT); + break; + case 44: + reg = (TTBCR2_ADDR_44 << TTBCR2_SEP_SHIFT); + break; + case 48: + reg = (TTBCR2_ADDR_48 << TTBCR2_SEP_SHIFT); + break; + } + + switch (smmu->s1_output_size) { + case 32: + reg |= (TTBCR2_ADDR_32 << TTBCR2_PASIZE_SHIFT); + break; + case 36: + reg |= (TTBCR2_ADDR_36 << TTBCR2_PASIZE_SHIFT); + break; + case 39: + reg |= (TTBCR2_ADDR_40 << TTBCR2_PASIZE_SHIFT); + break; + case 42: + reg |= (TTBCR2_ADDR_42 << TTBCR2_PASIZE_SHIFT); + break; + case 44: + reg |= (TTBCR2_ADDR_44 << TTBCR2_PASIZE_SHIFT); + break; + case 48: + reg |= (TTBCR2_ADDR_48 << TTBCR2_PASIZE_SHIFT); + break; + } + + if (stage1) + writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBCR2); + } + + /* TTBR0 */ + arm_smmu_flush_pgtable(smmu, root_cfg->pgd, + PTRS_PER_PGD * sizeof(pgd_t)); + reg = __pa(root_cfg->pgd); + writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBR0_LO); + reg = (phys_addr_t)__pa(root_cfg->pgd) >> 32; + if (stage1) + reg |= ARM_SMMU_CB_ASID(root_cfg) << TTBRn_HI_ASID_SHIFT; + writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBR0_HI); + + /* + * TTBCR + * We use long descriptor, with inner-shareable WBWA tables in TTBR0. + */ + if (smmu->version > 1) { + if (PAGE_SIZE == SZ_4K) + reg = TTBCR_TG0_4K; + else + reg = TTBCR_TG0_64K; + + if (!stage1) { + switch (smmu->s2_output_size) { + case 32: + reg |= (TTBCR2_ADDR_32 << TTBCR_PASIZE_SHIFT); + break; + case 36: + reg |= (TTBCR2_ADDR_36 << TTBCR_PASIZE_SHIFT); + break; + case 40: + reg |= (TTBCR2_ADDR_40 << TTBCR_PASIZE_SHIFT); + break; + case 42: + reg |= (TTBCR2_ADDR_42 << TTBCR_PASIZE_SHIFT); + break; + case 44: + reg |= (TTBCR2_ADDR_44 << TTBCR_PASIZE_SHIFT); + break; + case 48: + reg |= (TTBCR2_ADDR_48 << TTBCR_PASIZE_SHIFT); + break; + } + } else { + reg |= (64 - smmu->s1_output_size) << TTBCR_T0SZ_SHIFT; + } + } else { + reg = 0; + } + + reg |= TTBCR_EAE | + (TTBCR_SH_IS << TTBCR_SH0_SHIFT) | + (TTBCR_RGN_WBWA << TTBCR_ORGN0_SHIFT) | + (TTBCR_RGN_WBWA << TTBCR_IRGN0_SHIFT) | + (TTBCR_SL0_LVL_1 << TTBCR_SL0_SHIFT); + writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBCR); + + /* MAIR0 (stage-1 only) */ + if (stage1) { + reg = (MAIR_ATTR_NC << MAIR_ATTR_SHIFT(MAIR_ATTR_IDX_NC)) | + (MAIR_ATTR_WBRWA << MAIR_ATTR_SHIFT(MAIR_ATTR_IDX_CACHE)) | + (MAIR_ATTR_DEVICE << MAIR_ATTR_SHIFT(MAIR_ATTR_IDX_DEV)); + writel_relaxed(reg, cb_base + ARM_SMMU_CB_S1_MAIR0); + } + + /* SCTLR */ + reg = SCTLR_CFCFG | SCTLR_CFIE | SCTLR_CFRE | SCTLR_M | SCTLR_EAE_SBOP; + if (stage1) + reg |= SCTLR_S1_ASIDPNE; +#ifdef __BIG_ENDIAN + reg |= SCTLR_E; +#endif + writel_relaxed(reg, cb_base + ARM_SMMU_CB_SCTLR); +} + +static int arm_smmu_init_domain_context(struct iommu_domain *domain, + struct device *dev) +{ + int irq, ret, start; + struct arm_smmu_domain *smmu_domain = domain->priv; + struct arm_smmu_cfg *root_cfg = &smmu_domain->root_cfg; + struct arm_smmu_device *smmu, *parent; + + /* + * Walk the SMMU chain to find the root device for this chain. + * We assume that no masters have translations which terminate + * early, and therefore check that the root SMMU does indeed have + * a StreamID for the master in question. + */ + parent = dev->archdata.iommu; + smmu_domain->output_mask = -1; + do { + smmu = parent; + smmu_domain->output_mask &= (1ULL << smmu->s2_output_size) - 1; + } while ((parent = find_parent_smmu(smmu))); + + if (!find_smmu_master(smmu, dev->of_node)) { + dev_err(dev, "unable to find root SMMU for device\n"); + return -ENODEV; + } + + if (smmu->features & ARM_SMMU_FEAT_TRANS_NESTED) { + /* + * We will likely want to change this if/when KVM gets + * involved. + */ + root_cfg->cbar = CBAR_TYPE_S1_TRANS_S2_BYPASS; + start = smmu->num_s2_context_banks; + } else if (smmu->features & ARM_SMMU_FEAT_TRANS_S2) { + root_cfg->cbar = CBAR_TYPE_S2_TRANS; + start = 0; + } else { + root_cfg->cbar = CBAR_TYPE_S1_TRANS_S2_BYPASS; + start = smmu->num_s2_context_banks; + } + + ret = __arm_smmu_alloc_bitmap(smmu->context_map, start, + smmu->num_context_banks); + if (IS_ERR_VALUE(ret)) + return ret; + + root_cfg->cbndx = ret; + if (smmu->version == 1) { + root_cfg->irptndx = atomic_inc_return(&smmu->irptndx); + root_cfg->irptndx %= smmu->num_context_irqs; + } else { + root_cfg->irptndx = root_cfg->cbndx; + } + + irq = smmu->irqs[smmu->num_global_irqs + root_cfg->irptndx]; + ret = request_irq(irq, arm_smmu_context_fault, IRQF_SHARED, + "arm-smmu-context-fault", domain); + if (IS_ERR_VALUE(ret)) { + dev_err(smmu->dev, "failed to request context IRQ %d (%u)\n", + root_cfg->irptndx, irq); + root_cfg->irptndx = INVALID_IRPTNDX; + goto out_free_context; + } + + root_cfg->smmu = smmu; + arm_smmu_init_context_bank(smmu_domain); + return ret; + +out_free_context: + __arm_smmu_free_bitmap(smmu->context_map, root_cfg->cbndx); + return ret; +} + +static void arm_smmu_destroy_domain_context(struct iommu_domain *domain) +{ + struct arm_smmu_domain *smmu_domain = domain->priv; + struct arm_smmu_cfg *root_cfg = &smmu_domain->root_cfg; + struct arm_smmu_device *smmu = root_cfg->smmu; + void __iomem *cb_base; + int irq; + + if (!smmu) + return; + + /* Disable the context bank and nuke the TLB before freeing it. */ + cb_base = ARM_SMMU_CB_BASE(smmu) + ARM_SMMU_CB(smmu, root_cfg->cbndx); + writel_relaxed(0, cb_base + ARM_SMMU_CB_SCTLR); + arm_smmu_tlb_inv_context(root_cfg); + + if (root_cfg->irptndx != INVALID_IRPTNDX) { + irq = smmu->irqs[smmu->num_global_irqs + root_cfg->irptndx]; + free_irq(irq, domain); + } + + __arm_smmu_free_bitmap(smmu->context_map, root_cfg->cbndx); +} + +static int arm_smmu_domain_init(struct iommu_domain *domain) +{ + struct arm_smmu_domain *smmu_domain; + pgd_t *pgd; + + /* + * Allocate the domain and initialise some of its data structures. + * We can't really do anything meaningful until we've added a + * master. + */ + smmu_domain = kzalloc(sizeof(*smmu_domain), GFP_KERNEL); + if (!smmu_domain) + return -ENOMEM; + + pgd = kzalloc(PTRS_PER_PGD * sizeof(pgd_t), GFP_KERNEL); + if (!pgd) + goto out_free_domain; + smmu_domain->root_cfg.pgd = pgd; + + spin_lock_init(&smmu_domain->lock); + domain->priv = smmu_domain; + return 0; + +out_free_domain: + kfree(smmu_domain); + return -ENOMEM; +} + +static void arm_smmu_free_ptes(pmd_t *pmd) +{ + pgtable_t table = pmd_pgtable(*pmd); + pgtable_page_dtor(table); + __free_page(table); +} + +static void arm_smmu_free_pmds(pud_t *pud) +{ + int i; + pmd_t *pmd, *pmd_base = pmd_offset(pud, 0); + + pmd = pmd_base; + for (i = 0; i < PTRS_PER_PMD; ++i) { + if (pmd_none(*pmd)) + continue; + + arm_smmu_free_ptes(pmd); + pmd++; + } + + pmd_free(NULL, pmd_base); +} + +static void arm_smmu_free_puds(pgd_t *pgd) +{ + int i; + pud_t *pud, *pud_base = pud_offset(pgd, 0); + + pud = pud_base; + for (i = 0; i < PTRS_PER_PUD; ++i) { + if (pud_none(*pud)) + continue; + + arm_smmu_free_pmds(pud); + pud++; + } + + pud_free(NULL, pud_base); +} + +static void arm_smmu_free_pgtables(struct arm_smmu_domain *smmu_domain) +{ + int i; + struct arm_smmu_cfg *root_cfg = &smmu_domain->root_cfg; + pgd_t *pgd, *pgd_base = root_cfg->pgd; + + /* + * Recursively free the page tables for this domain. We don't + * care about speculative TLB filling because the tables should + * not be active in any context bank at this point (SCTLR.M is 0). + */ + pgd = pgd_base; + for (i = 0; i < PTRS_PER_PGD; ++i) { + if (pgd_none(*pgd)) + continue; + arm_smmu_free_puds(pgd); + pgd++; + } + + kfree(pgd_base); +} + +static void arm_smmu_domain_destroy(struct iommu_domain *domain) +{ + struct arm_smmu_domain *smmu_domain = domain->priv; + + /* + * Free the domain resources. We assume that all devices have + * already been detached. + */ + arm_smmu_destroy_domain_context(domain); + arm_smmu_free_pgtables(smmu_domain); + kfree(smmu_domain); +} + +static int arm_smmu_master_configure_smrs(struct arm_smmu_device *smmu, + struct arm_smmu_master *master) +{ + int i; + struct arm_smmu_smr *smrs; + void __iomem *gr0_base = ARM_SMMU_GR0(smmu); + + if (!(smmu->features & ARM_SMMU_FEAT_STREAM_MATCH)) + return 0; + + if (master->smrs) + return -EEXIST; + + smrs = kmalloc(sizeof(*smrs) * master->num_streamids, GFP_KERNEL); + if (!smrs) { + dev_err(smmu->dev, "failed to allocate %d SMRs for master %s\n", + master->num_streamids, master->of_node->name); + return -ENOMEM; + } + + /* Allocate the SMRs on the root SMMU */ + for (i = 0; i < master->num_streamids; ++i) { + int idx = __arm_smmu_alloc_bitmap(smmu->smr_map, 0, + smmu->num_mapping_groups); + if (IS_ERR_VALUE(idx)) { + dev_err(smmu->dev, "failed to allocate free SMR\n"); + goto err_free_smrs; + } + + smrs[i] = (struct arm_smmu_smr) { + .idx = idx, + .mask = 0, /* We don't currently share SMRs */ + .id = master->streamids[i], + }; + } + + /* It worked! Now, poke the actual hardware */ + for (i = 0; i < master->num_streamids; ++i) { + u32 reg = SMR_VALID | smrs[i].id << SMR_ID_SHIFT | + smrs[i].mask << SMR_MASK_SHIFT; + writel_relaxed(reg, gr0_base + ARM_SMMU_GR0_SMR(smrs[i].idx)); + } + + master->smrs = smrs; + return 0; + +err_free_smrs: + while (--i >= 0) + __arm_smmu_free_bitmap(smmu->smr_map, smrs[i].idx); + kfree(smrs); + return -ENOSPC; +} + +static void arm_smmu_master_free_smrs(struct arm_smmu_device *smmu, + struct arm_smmu_master *master) +{ + int i; + void __iomem *gr0_base = ARM_SMMU_GR0(smmu); + struct arm_smmu_smr *smrs = master->smrs; + + /* Invalidate the SMRs before freeing back to the allocator */ + for (i = 0; i < master->num_streamids; ++i) { + u8 idx = smrs[i].idx; + writel_relaxed(~SMR_VALID, gr0_base + ARM_SMMU_GR0_SMR(idx)); + __arm_smmu_free_bitmap(smmu->smr_map, idx); + } + + master->smrs = NULL; + kfree(smrs); +} + +static void arm_smmu_bypass_stream_mapping(struct arm_smmu_device *smmu, + struct arm_smmu_master *master) +{ + int i; + void __iomem *gr0_base = ARM_SMMU_GR0(smmu); + + for (i = 0; i < master->num_streamids; ++i) { + u16 sid = master->streamids[i]; + writel_relaxed(S2CR_TYPE_BYPASS, + gr0_base + ARM_SMMU_GR0_S2CR(sid)); + } +} + +static int arm_smmu_domain_add_master(struct arm_smmu_domain *smmu_domain, + struct arm_smmu_master *master) +{ + int i, ret; + struct arm_smmu_device *parent, *smmu = smmu_domain->root_cfg.smmu; + void __iomem *gr0_base = ARM_SMMU_GR0(smmu); + + ret = arm_smmu_master_configure_smrs(smmu, master); + if (ret) + return ret; + + /* Bypass the leaves */ + smmu = smmu_domain->leaf_smmu; + while ((parent = find_parent_smmu(smmu))) { + /* + * We won't have a StreamID match for anything but the root + * smmu, so we only need to worry about StreamID indexing, + * where we must install bypass entries in the S2CRs. + */ + if (smmu->features & ARM_SMMU_FEAT_STREAM_MATCH) + continue; + + arm_smmu_bypass_stream_mapping(smmu, master); + smmu = parent; + } + + /* Now we're at the root, time to point at our context bank */ + for (i = 0; i < master->num_streamids; ++i) { + u32 idx, s2cr; + idx = master->smrs ? master->smrs[i].idx : master->streamids[i]; + s2cr = S2CR_TYPE_TRANS | + (smmu_domain->root_cfg.cbndx << S2CR_CBNDX_SHIFT); + writel_relaxed(s2cr, gr0_base + ARM_SMMU_GR0_S2CR(idx)); + } + + return 0; +} + +static void arm_smmu_domain_remove_master(struct arm_smmu_domain *smmu_domain, + struct arm_smmu_master *master) +{ + struct arm_smmu_device *smmu = smmu_domain->root_cfg.smmu; + + /* + * We *must* clear the S2CR first, because freeing the SMR means + * that it can be re-allocated immediately. + */ + arm_smmu_bypass_stream_mapping(smmu, master); + arm_smmu_master_free_smrs(smmu, master); +} + +static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) +{ + int ret = -EINVAL; + struct arm_smmu_domain *smmu_domain = domain->priv; + struct arm_smmu_device *device_smmu = dev->archdata.iommu; + struct arm_smmu_master *master; + unsigned long flags; + + if (!device_smmu) { + dev_err(dev, "cannot attach to SMMU, is it on the same bus?\n"); + return -ENXIO; + } + + /* + * Sanity check the domain. We don't currently support domains + * that cross between different SMMU chains. + */ + spin_lock_irqsave(&smmu_domain->lock, flags); + if (!smmu_domain->leaf_smmu) { + /* Now that we have a master, we can finalise the domain */ + ret = arm_smmu_init_domain_context(domain, dev); + if (IS_ERR_VALUE(ret)) + goto err_unlock; + + smmu_domain->leaf_smmu = device_smmu; + } else if (smmu_domain->leaf_smmu != device_smmu) { + dev_err(dev, + "cannot attach to SMMU %s whilst already attached to domain on SMMU %s\n", + dev_name(smmu_domain->leaf_smmu->dev), + dev_name(device_smmu->dev)); + goto err_unlock; + } + spin_unlock_irqrestore(&smmu_domain->lock, flags); + + /* Looks ok, so add the device to the domain */ + master = find_smmu_master(smmu_domain->leaf_smmu, dev->of_node); + if (!master) + return -ENODEV; + + return arm_smmu_domain_add_master(smmu_domain, master); + +err_unlock: + spin_unlock_irqrestore(&smmu_domain->lock, flags); + return ret; +} + +static void arm_smmu_detach_dev(struct iommu_domain *domain, struct device *dev) +{ + struct arm_smmu_domain *smmu_domain = domain->priv; + struct arm_smmu_master *master; + + master = find_smmu_master(smmu_domain->leaf_smmu, dev->of_node); + if (master) + arm_smmu_domain_remove_master(smmu_domain, master); +} + +static bool arm_smmu_pte_is_contiguous_range(unsigned long addr, + unsigned long end) +{ + return !(addr & ~ARM_SMMU_PTE_CONT_MASK) && + (addr + ARM_SMMU_PTE_CONT_SIZE <= end); +} + +static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd, + unsigned long addr, unsigned long end, + unsigned long pfn, int prot, int stage) +{ + pte_t *pte, *start; + pteval_t pteval = ARM_SMMU_PTE_PAGE | ARM_SMMU_PTE_AF | ARM_SMMU_PTE_XN; + + if (pmd_none(*pmd)) { + /* Allocate a new set of tables */ + pgtable_t table = alloc_page(GFP_ATOMIC|__GFP_ZERO); + if (!table) + return -ENOMEM; + + arm_smmu_flush_pgtable(smmu, page_address(table), PAGE_SIZE); + if (!pgtable_page_ctor(table)) { + __free_page(table); + return -ENOMEM; + } + pmd_populate(NULL, pmd, table); + arm_smmu_flush_pgtable(smmu, pmd, sizeof(*pmd)); + } + + if (stage == 1) { + pteval |= ARM_SMMU_PTE_AP_UNPRIV | ARM_SMMU_PTE_nG; + if (!(prot & IOMMU_WRITE) && (prot & IOMMU_READ)) + pteval |= ARM_SMMU_PTE_AP_RDONLY; + + if (prot & IOMMU_CACHE) + pteval |= (MAIR_ATTR_IDX_CACHE << + ARM_SMMU_PTE_ATTRINDX_SHIFT); + } else { + pteval |= ARM_SMMU_PTE_HAP_FAULT; + if (prot & IOMMU_READ) + pteval |= ARM_SMMU_PTE_HAP_READ; + if (prot & IOMMU_WRITE) + pteval |= ARM_SMMU_PTE_HAP_WRITE; + if (prot & IOMMU_CACHE) + pteval |= ARM_SMMU_PTE_MEMATTR_OIWB; + else + pteval |= ARM_SMMU_PTE_MEMATTR_NC; + } + + /* If no access, create a faulting entry to avoid TLB fills */ + if (prot & IOMMU_EXEC) + pteval &= ~ARM_SMMU_PTE_XN; + else if (!(prot & (IOMMU_READ | IOMMU_WRITE))) + pteval &= ~ARM_SMMU_PTE_PAGE; + + pteval |= ARM_SMMU_PTE_SH_IS; + start = pmd_page_vaddr(*pmd) + pte_index(addr); + pte = start; + + /* + * Install the page table entries. This is fairly complicated + * since we attempt to make use of the contiguous hint in the + * ptes where possible. The contiguous hint indicates a series + * of ARM_SMMU_PTE_CONT_ENTRIES ptes mapping a physically + * contiguous region with the following constraints: + * + * - The region start is aligned to ARM_SMMU_PTE_CONT_SIZE + * - Each pte in the region has the contiguous hint bit set + * + * This complicates unmapping (also handled by this code, when + * neither IOMMU_READ or IOMMU_WRITE are set) because it is + * possible, yet highly unlikely, that a client may unmap only + * part of a contiguous range. This requires clearing of the + * contiguous hint bits in the range before installing the new + * faulting entries. + * + * Note that re-mapping an address range without first unmapping + * it is not supported, so TLB invalidation is not required here + * and is instead performed at unmap and domain-init time. + */ + do { + int i = 1; + pteval &= ~ARM_SMMU_PTE_CONT; + + if (arm_smmu_pte_is_contiguous_range(addr, end)) { + i = ARM_SMMU_PTE_CONT_ENTRIES; + pteval |= ARM_SMMU_PTE_CONT; + } else if (pte_val(*pte) & + (ARM_SMMU_PTE_CONT | ARM_SMMU_PTE_PAGE)) { + int j; + pte_t *cont_start; + unsigned long idx = pte_index(addr); + + idx &= ~(ARM_SMMU_PTE_CONT_ENTRIES - 1); + cont_start = pmd_page_vaddr(*pmd) + idx; + for (j = 0; j < ARM_SMMU_PTE_CONT_ENTRIES; ++j) + pte_val(*(cont_start + j)) &= ~ARM_SMMU_PTE_CONT; + + arm_smmu_flush_pgtable(smmu, cont_start, + sizeof(*pte) * + ARM_SMMU_PTE_CONT_ENTRIES); + } + + do { + *pte = pfn_pte(pfn, __pgprot(pteval)); + } while (pte++, pfn++, addr += PAGE_SIZE, --i); + } while (addr != end); + + arm_smmu_flush_pgtable(smmu, start, sizeof(*pte) * (pte - start)); + return 0; +} + +static int arm_smmu_alloc_init_pmd(struct arm_smmu_device *smmu, pud_t *pud, + unsigned long addr, unsigned long end, + phys_addr_t phys, int prot, int stage) +{ + int ret; + pmd_t *pmd; + unsigned long next, pfn = __phys_to_pfn(phys); + +#ifndef __PAGETABLE_PMD_FOLDED + if (pud_none(*pud)) { + pmd = (pmd_t *)get_zeroed_page(GFP_ATOMIC); + if (!pmd) + return -ENOMEM; + + arm_smmu_flush_pgtable(smmu, pmd, PAGE_SIZE); + pud_populate(NULL, pud, pmd); + arm_smmu_flush_pgtable(smmu, pud, sizeof(*pud)); + + pmd += pmd_index(addr); + } else +#endif + pmd = pmd_offset(pud, addr); + + do { + next = pmd_addr_end(addr, end); + ret = arm_smmu_alloc_init_pte(smmu, pmd, addr, next, pfn, + prot, stage); + phys += next - addr; + } while (pmd++, addr = next, addr < end); + + return ret; +} + +static int arm_smmu_alloc_init_pud(struct arm_smmu_device *smmu, pgd_t *pgd, + unsigned long addr, unsigned long end, + phys_addr_t phys, int prot, int stage) +{ + int ret = 0; + pud_t *pud; + unsigned long next; + +#ifndef __PAGETABLE_PUD_FOLDED + if (pgd_none(*pgd)) { + pud = (pud_t *)get_zeroed_page(GFP_ATOMIC); + if (!pud) + return -ENOMEM; + + arm_smmu_flush_pgtable(smmu, pud, PAGE_SIZE); + pgd_populate(NULL, pgd, pud); + arm_smmu_flush_pgtable(smmu, pgd, sizeof(*pgd)); + + pud += pud_index(addr); + } else +#endif + pud = pud_offset(pgd, addr); + + do { + next = pud_addr_end(addr, end); + ret = arm_smmu_alloc_init_pmd(smmu, pud, addr, next, phys, + prot, stage); + phys += next - addr; + } while (pud++, addr = next, addr < end); + + return ret; +} + +static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain, + unsigned long iova, phys_addr_t paddr, + size_t size, int prot) +{ + int ret, stage; + unsigned long end; + phys_addr_t input_mask, output_mask; + struct arm_smmu_cfg *root_cfg = &smmu_domain->root_cfg; + pgd_t *pgd = root_cfg->pgd; + struct arm_smmu_device *smmu = root_cfg->smmu; + unsigned long flags; + + if (root_cfg->cbar == CBAR_TYPE_S2_TRANS) { + stage = 2; + output_mask = (1ULL << smmu->s2_output_size) - 1; + } else { + stage = 1; + output_mask = (1ULL << smmu->s1_output_size) - 1; + } + + if (!pgd) + return -EINVAL; + + if (size & ~PAGE_MASK) + return -EINVAL; + + input_mask = (1ULL << smmu->input_size) - 1; + if ((phys_addr_t)iova & ~input_mask) + return -ERANGE; + + if (paddr & ~output_mask) + return -ERANGE; + + spin_lock_irqsave(&smmu_domain->lock, flags); + pgd += pgd_index(iova); + end = iova + size; + do { + unsigned long next = pgd_addr_end(iova, end); + + ret = arm_smmu_alloc_init_pud(smmu, pgd, iova, next, paddr, + prot, stage); + if (ret) + goto out_unlock; + + paddr += next - iova; + iova = next; + } while (pgd++, iova != end); + +out_unlock: + spin_unlock_irqrestore(&smmu_domain->lock, flags); + + return ret; +} + +static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova, + phys_addr_t paddr, size_t size, int prot) +{ + struct arm_smmu_domain *smmu_domain = domain->priv; + + if (!smmu_domain) + return -ENODEV; + + /* Check for silent address truncation up the SMMU chain. */ + if ((phys_addr_t)iova & ~smmu_domain->output_mask) + return -ERANGE; + + return arm_smmu_handle_mapping(smmu_domain, iova, paddr, size, prot); +} + +static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova, + size_t size) +{ + int ret; + struct arm_smmu_domain *smmu_domain = domain->priv; + + ret = arm_smmu_handle_mapping(smmu_domain, iova, 0, size, 0); + arm_smmu_tlb_inv_context(&smmu_domain->root_cfg); + return ret ? 0 : size; +} + +static phys_addr_t arm_smmu_iova_to_phys(struct iommu_domain *domain, + dma_addr_t iova) +{ + pgd_t *pgdp, pgd; + pud_t pud; + pmd_t pmd; + pte_t pte; + struct arm_smmu_domain *smmu_domain = domain->priv; + struct arm_smmu_cfg *root_cfg = &smmu_domain->root_cfg; + + pgdp = root_cfg->pgd; + if (!pgdp) + return 0; + + pgd = *(pgdp + pgd_index(iova)); + if (pgd_none(pgd)) + return 0; + + pud = *pud_offset(&pgd, iova); + if (pud_none(pud)) + return 0; + + pmd = *pmd_offset(&pud, iova); + if (pmd_none(pmd)) + return 0; + + pte = *(pmd_page_vaddr(pmd) + pte_index(iova)); + if (pte_none(pte)) + return 0; + + return __pfn_to_phys(pte_pfn(pte)) | (iova & ~PAGE_MASK); +} + +static int arm_smmu_domain_has_cap(struct iommu_domain *domain, + unsigned long cap) +{ + unsigned long caps = 0; + struct arm_smmu_domain *smmu_domain = domain->priv; + + if (smmu_domain->root_cfg.smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) + caps |= IOMMU_CAP_CACHE_COHERENCY; + + return !!(cap & caps); +} + +static int arm_smmu_add_device(struct device *dev) +{ + struct arm_smmu_device *child, *parent, *smmu; + struct arm_smmu_master *master = NULL; + struct iommu_group *group; + int ret; + + if (dev->archdata.iommu) { + dev_warn(dev, "IOMMU driver already assigned to device\n"); + return -EINVAL; + } + + spin_lock(&arm_smmu_devices_lock); + list_for_each_entry(parent, &arm_smmu_devices, list) { + smmu = parent; + + /* Try to find a child of the current SMMU. */ + list_for_each_entry(child, &arm_smmu_devices, list) { + if (child->parent_of_node == parent->dev->of_node) { + /* Does the child sit above our master? */ + master = find_smmu_master(child, dev->of_node); + if (master) { + smmu = NULL; + break; + } + } + } + + /* We found some children, so keep searching. */ + if (!smmu) { + master = NULL; + continue; + } + + master = find_smmu_master(smmu, dev->of_node); + if (master) + break; + } + spin_unlock(&arm_smmu_devices_lock); + + if (!master) + return -ENODEV; + + group = iommu_group_alloc(); + if (IS_ERR(group)) { + dev_err(dev, "Failed to allocate IOMMU group\n"); + return PTR_ERR(group); + } + + ret = iommu_group_add_device(group, dev); + iommu_group_put(group); + dev->archdata.iommu = smmu; + + return ret; +} + +static void arm_smmu_remove_device(struct device *dev) +{ + dev->archdata.iommu = NULL; + iommu_group_remove_device(dev); +} + +static struct iommu_ops arm_smmu_ops = { + .domain_init = arm_smmu_domain_init, + .domain_destroy = arm_smmu_domain_destroy, + .attach_dev = arm_smmu_attach_dev, + .detach_dev = arm_smmu_detach_dev, + .map = arm_smmu_map, + .unmap = arm_smmu_unmap, + .iova_to_phys = arm_smmu_iova_to_phys, + .domain_has_cap = arm_smmu_domain_has_cap, + .add_device = arm_smmu_add_device, + .remove_device = arm_smmu_remove_device, + .pgsize_bitmap = (SECTION_SIZE | + ARM_SMMU_PTE_CONT_SIZE | + PAGE_SIZE), +}; + +static void arm_smmu_device_reset(struct arm_smmu_device *smmu) +{ + void __iomem *gr0_base = ARM_SMMU_GR0(smmu); + void __iomem *cb_base; + int i = 0; + u32 reg; + + /* clear global FSR */ + reg = readl_relaxed(ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sGFSR); + writel(reg, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sGFSR); + + /* Mark all SMRn as invalid and all S2CRn as bypass */ + for (i = 0; i < smmu->num_mapping_groups; ++i) { + writel_relaxed(~SMR_VALID, gr0_base + ARM_SMMU_GR0_SMR(i)); + writel_relaxed(S2CR_TYPE_BYPASS, gr0_base + ARM_SMMU_GR0_S2CR(i)); + } + + /* Make sure all context banks are disabled and clear CB_FSR */ + for (i = 0; i < smmu->num_context_banks; ++i) { + cb_base = ARM_SMMU_CB_BASE(smmu) + ARM_SMMU_CB(smmu, i); + writel_relaxed(0, cb_base + ARM_SMMU_CB_SCTLR); + writel_relaxed(FSR_FAULT, cb_base + ARM_SMMU_CB_FSR); + } + + /* Invalidate the TLB, just in case */ + writel_relaxed(0, gr0_base + ARM_SMMU_GR0_STLBIALL); + writel_relaxed(0, gr0_base + ARM_SMMU_GR0_TLBIALLH); + writel_relaxed(0, gr0_base + ARM_SMMU_GR0_TLBIALLNSNH); + + reg = readl_relaxed(ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0); + + /* Enable fault reporting */ + reg |= (sCR0_GFRE | sCR0_GFIE | sCR0_GCFGFRE | sCR0_GCFGFIE); + + /* Disable TLB broadcasting. */ + reg |= (sCR0_VMIDPNE | sCR0_PTM); + + /* Enable client access, but bypass when no mapping is found */ + reg &= ~(sCR0_CLIENTPD | sCR0_USFCFG); + + /* Disable forced broadcasting */ + reg &= ~sCR0_FB; + + /* Don't upgrade barriers */ + reg &= ~(sCR0_BSU_MASK << sCR0_BSU_SHIFT); + + /* Push the button */ + arm_smmu_tlb_sync(smmu); + writel(reg, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0); +} + +static int arm_smmu_id_size_to_bits(int size) +{ + switch (size) { + case 0: + return 32; + case 1: + return 36; + case 2: + return 40; + case 3: + return 42; + case 4: + return 44; + case 5: + default: + return 48; + } +} + +static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu) +{ + unsigned long size; + void __iomem *gr0_base = ARM_SMMU_GR0(smmu); + u32 id; + + dev_notice(smmu->dev, "probing hardware configuration...\n"); + + /* Primecell ID */ + id = readl_relaxed(gr0_base + ARM_SMMU_GR0_PIDR2); + smmu->version = ((id >> PIDR2_ARCH_SHIFT) & PIDR2_ARCH_MASK) + 1; + dev_notice(smmu->dev, "SMMUv%d with:\n", smmu->version); + + /* ID0 */ + id = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID0); +#ifndef CONFIG_64BIT + if (((id >> ID0_PTFS_SHIFT) & ID0_PTFS_MASK) == ID0_PTFS_V8_ONLY) { + dev_err(smmu->dev, "\tno v7 descriptor support!\n"); + return -ENODEV; + } +#endif + if (id & ID0_S1TS) { + smmu->features |= ARM_SMMU_FEAT_TRANS_S1; + dev_notice(smmu->dev, "\tstage 1 translation\n"); + } + + if (id & ID0_S2TS) { + smmu->features |= ARM_SMMU_FEAT_TRANS_S2; + dev_notice(smmu->dev, "\tstage 2 translation\n"); + } + + if (id & ID0_NTS) { + smmu->features |= ARM_SMMU_FEAT_TRANS_NESTED; + dev_notice(smmu->dev, "\tnested translation\n"); + } + + if (!(smmu->features & + (ARM_SMMU_FEAT_TRANS_S1 | ARM_SMMU_FEAT_TRANS_S2 | + ARM_SMMU_FEAT_TRANS_NESTED))) { + dev_err(smmu->dev, "\tno translation support!\n"); + return -ENODEV; + } + + if (id & ID0_CTTW) { + smmu->features |= ARM_SMMU_FEAT_COHERENT_WALK; + dev_notice(smmu->dev, "\tcoherent table walk\n"); + } + + if (id & ID0_SMS) { + u32 smr, sid, mask; + + smmu->features |= ARM_SMMU_FEAT_STREAM_MATCH; + smmu->num_mapping_groups = (id >> ID0_NUMSMRG_SHIFT) & + ID0_NUMSMRG_MASK; + if (smmu->num_mapping_groups == 0) { + dev_err(smmu->dev, + "stream-matching supported, but no SMRs present!\n"); + return -ENODEV; + } + + smr = SMR_MASK_MASK << SMR_MASK_SHIFT; + smr |= (SMR_ID_MASK << SMR_ID_SHIFT); + writel_relaxed(smr, gr0_base + ARM_SMMU_GR0_SMR(0)); + smr = readl_relaxed(gr0_base + ARM_SMMU_GR0_SMR(0)); + + mask = (smr >> SMR_MASK_SHIFT) & SMR_MASK_MASK; + sid = (smr >> SMR_ID_SHIFT) & SMR_ID_MASK; + if ((mask & sid) != sid) { + dev_err(smmu->dev, + "SMR mask bits (0x%x) insufficient for ID field (0x%x)\n", + mask, sid); + return -ENODEV; + } + + dev_notice(smmu->dev, + "\tstream matching with %u register groups, mask 0x%x", + smmu->num_mapping_groups, mask); + } + + /* ID1 */ + id = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID1); + smmu->pagesize = (id & ID1_PAGESIZE) ? SZ_64K : SZ_4K; + + /* Check for size mismatch of SMMU address space from mapped region */ + size = 1 << (((id >> ID1_NUMPAGENDXB_SHIFT) & ID1_NUMPAGENDXB_MASK) + 1); + size *= (smmu->pagesize << 1); + if (smmu->size != size) + dev_warn(smmu->dev, "SMMU address space size (0x%lx) differs " + "from mapped region size (0x%lx)!\n", size, smmu->size); + + smmu->num_s2_context_banks = (id >> ID1_NUMS2CB_SHIFT) & + ID1_NUMS2CB_MASK; + smmu->num_context_banks = (id >> ID1_NUMCB_SHIFT) & ID1_NUMCB_MASK; + if (smmu->num_s2_context_banks > smmu->num_context_banks) { + dev_err(smmu->dev, "impossible number of S2 context banks!\n"); + return -ENODEV; + } + dev_notice(smmu->dev, "\t%u context banks (%u stage-2 only)\n", + smmu->num_context_banks, smmu->num_s2_context_banks); + + /* ID2 */ + id = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID2); + size = arm_smmu_id_size_to_bits((id >> ID2_IAS_SHIFT) & ID2_IAS_MASK); + + /* + * Stage-1 output limited by stage-2 input size due to pgd + * allocation (PTRS_PER_PGD). + */ +#ifdef CONFIG_64BIT + smmu->s1_output_size = min((unsigned long)VA_BITS, size); +#else + smmu->s1_output_size = min(32UL, size); +#endif + + /* The stage-2 output mask is also applied for bypass */ + size = arm_smmu_id_size_to_bits((id >> ID2_OAS_SHIFT) & ID2_OAS_MASK); + smmu->s2_output_size = min((unsigned long)PHYS_MASK_SHIFT, size); + + if (smmu->version == 1) { + smmu->input_size = 32; + } else { +#ifdef CONFIG_64BIT + size = (id >> ID2_UBS_SHIFT) & ID2_UBS_MASK; + size = min(VA_BITS, arm_smmu_id_size_to_bits(size)); +#else + size = 32; +#endif + smmu->input_size = size; + + if ((PAGE_SIZE == SZ_4K && !(id & ID2_PTFS_4K)) || + (PAGE_SIZE == SZ_64K && !(id & ID2_PTFS_64K)) || + (PAGE_SIZE != SZ_4K && PAGE_SIZE != SZ_64K)) { + dev_err(smmu->dev, "CPU page size 0x%lx unsupported\n", + PAGE_SIZE); + return -ENODEV; + } + } + + dev_notice(smmu->dev, + "\t%lu-bit VA, %lu-bit IPA, %lu-bit PA\n", + smmu->input_size, smmu->s1_output_size, smmu->s2_output_size); + return 0; +} + +static int arm_smmu_device_dt_probe(struct platform_device *pdev) +{ + struct resource *res; + struct arm_smmu_device *smmu; + struct device_node *dev_node; + struct device *dev = &pdev->dev; + struct rb_node *node; + struct of_phandle_args masterspec; + int num_irqs, i, err; + + smmu = devm_kzalloc(dev, sizeof(*smmu), GFP_KERNEL); + if (!smmu) { + dev_err(dev, "failed to allocate arm_smmu_device\n"); + return -ENOMEM; + } + smmu->dev = dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + smmu->base = devm_ioremap_resource(dev, res); + if (IS_ERR(smmu->base)) + return PTR_ERR(smmu->base); + smmu->size = resource_size(res); + + if (of_property_read_u32(dev->of_node, "#global-interrupts", + &smmu->num_global_irqs)) { + dev_err(dev, "missing #global-interrupts property\n"); + return -ENODEV; + } + + num_irqs = 0; + while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, num_irqs))) { + num_irqs++; + if (num_irqs > smmu->num_global_irqs) + smmu->num_context_irqs++; + } + + if (!smmu->num_context_irqs) { + dev_err(dev, "found %d interrupts but expected at least %d\n", + num_irqs, smmu->num_global_irqs + 1); + return -ENODEV; + } + + smmu->irqs = devm_kzalloc(dev, sizeof(*smmu->irqs) * num_irqs, + GFP_KERNEL); + if (!smmu->irqs) { + dev_err(dev, "failed to allocate %d irqs\n", num_irqs); + return -ENOMEM; + } + + for (i = 0; i < num_irqs; ++i) { + int irq = platform_get_irq(pdev, i); + if (irq < 0) { + dev_err(dev, "failed to get irq index %d\n", i); + return -ENODEV; + } + smmu->irqs[i] = irq; + } + + i = 0; + smmu->masters = RB_ROOT; + while (!of_parse_phandle_with_args(dev->of_node, "mmu-masters", + "#stream-id-cells", i, + &masterspec)) { + err = register_smmu_master(smmu, dev, &masterspec); + if (err) { + dev_err(dev, "failed to add master %s\n", + masterspec.np->name); + goto out_put_masters; + } + + i++; + } + dev_notice(dev, "registered %d master devices\n", i); + + if ((dev_node = of_parse_phandle(dev->of_node, "smmu-parent", 0))) + smmu->parent_of_node = dev_node; + + err = arm_smmu_device_cfg_probe(smmu); + if (err) + goto out_put_parent; + + parse_driver_options(smmu); + + if (smmu->version > 1 && + smmu->num_context_banks != smmu->num_context_irqs) { + dev_err(dev, + "found only %d context interrupt(s) but %d required\n", + smmu->num_context_irqs, smmu->num_context_banks); + err = -ENODEV; + goto out_put_parent; + } + + for (i = 0; i < smmu->num_global_irqs; ++i) { + err = request_irq(smmu->irqs[i], + arm_smmu_global_fault, + IRQF_SHARED, + "arm-smmu global fault", + smmu); + if (err) { + dev_err(dev, "failed to request global IRQ %d (%u)\n", + i, smmu->irqs[i]); + goto out_free_irqs; + } + } + + INIT_LIST_HEAD(&smmu->list); + spin_lock(&arm_smmu_devices_lock); + list_add(&smmu->list, &arm_smmu_devices); + spin_unlock(&arm_smmu_devices_lock); + + arm_smmu_device_reset(smmu); + return 0; + +out_free_irqs: + while (i--) + free_irq(smmu->irqs[i], smmu); + +out_put_parent: + if (smmu->parent_of_node) + of_node_put(smmu->parent_of_node); + +out_put_masters: + for (node = rb_first(&smmu->masters); node; node = rb_next(node)) { + struct arm_smmu_master *master; + master = container_of(node, struct arm_smmu_master, node); + of_node_put(master->of_node); + } + + return err; +} + +static int arm_smmu_device_remove(struct platform_device *pdev) +{ + int i; + struct device *dev = &pdev->dev; + struct arm_smmu_device *curr, *smmu = NULL; + struct rb_node *node; + + spin_lock(&arm_smmu_devices_lock); + list_for_each_entry(curr, &arm_smmu_devices, list) { + if (curr->dev == dev) { + smmu = curr; + list_del(&smmu->list); + break; + } + } + spin_unlock(&arm_smmu_devices_lock); + + if (!smmu) + return -ENODEV; + + if (smmu->parent_of_node) + of_node_put(smmu->parent_of_node); + + for (node = rb_first(&smmu->masters); node; node = rb_next(node)) { + struct arm_smmu_master *master; + master = container_of(node, struct arm_smmu_master, node); + of_node_put(master->of_node); + } + + if (!bitmap_empty(smmu->context_map, ARM_SMMU_MAX_CBS)) + dev_err(dev, "removing device with active domains!\n"); + + for (i = 0; i < smmu->num_global_irqs; ++i) + free_irq(smmu->irqs[i], smmu); + + /* Turn the thing off */ + writel(sCR0_CLIENTPD,ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0); + return 0; +} + +#ifdef CONFIG_OF +static struct of_device_id arm_smmu_of_match[] = { + { .compatible = "arm,smmu-v1", }, + { .compatible = "arm,smmu-v2", }, + { .compatible = "arm,mmu-400", }, + { .compatible = "arm,mmu-500", }, + { }, +}; +MODULE_DEVICE_TABLE(of, arm_smmu_of_match); +#endif + +static struct platform_driver arm_smmu_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "arm-smmu", + .of_match_table = of_match_ptr(arm_smmu_of_match), + }, + .probe = arm_smmu_device_dt_probe, + .remove = arm_smmu_device_remove, +}; + +static int __init arm_smmu_init(void) +{ + int ret; + + ret = platform_driver_register(&arm_smmu_driver); + if (ret) + return ret; + + /* Oh, for a proper bus abstraction */ + if (!iommu_present(&platform_bus_type)) + bus_set_iommu(&platform_bus_type, &arm_smmu_ops); + +#ifdef CONFIG_ARM_AMBA + if (!iommu_present(&amba_bustype)) + bus_set_iommu(&amba_bustype, &arm_smmu_ops); +#endif + + return 0; +} + +static void __exit arm_smmu_exit(void) +{ + return platform_driver_unregister(&arm_smmu_driver); +} + +subsys_initcall(arm_smmu_init); +module_exit(arm_smmu_exit); + +MODULE_DESCRIPTION("IOMMU API for ARM architected SMMU implementations"); +MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 86e2f4a62b9..9a4f05e5b23 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -41,14 +41,29 @@ #include <asm/irq_remapping.h> #include <asm/iommu_table.h> -/* No locks are needed as DMA remapping hardware unit - * list is constructed at boot time and hotplug of - * these units are not supported by the architecture. +#include "irq_remapping.h" + +/* + * Assumptions: + * 1) The hotplug framework guarentees that DMAR unit will be hot-added + * before IO devices managed by that unit. + * 2) The hotplug framework guarantees that DMAR unit will be hot-removed + * after IO devices managed by that unit. + * 3) Hotplug events are rare. + * + * Locking rules for DMA and interrupt remapping related global data structures: + * 1) Use dmar_global_lock in process context + * 2) Use RCU in interrupt context */ +DECLARE_RWSEM(dmar_global_lock); LIST_HEAD(dmar_drhd_units); struct acpi_table_header * __initdata dmar_tbl; static acpi_size dmar_tbl_size; +static int dmar_dev_scope_status = 1; + +static int alloc_iommu(struct dmar_drhd_unit *drhd); +static void free_iommu(struct intel_iommu *iommu); static void __init dmar_register_drhd_unit(struct dmar_drhd_unit *drhd) { @@ -57,108 +72,260 @@ static void __init dmar_register_drhd_unit(struct dmar_drhd_unit *drhd) * the very end. */ if (drhd->include_all) - list_add_tail(&drhd->list, &dmar_drhd_units); + list_add_tail_rcu(&drhd->list, &dmar_drhd_units); else - list_add(&drhd->list, &dmar_drhd_units); -} - -static int __init dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope, - struct pci_dev **dev, u16 segment) -{ - struct pci_bus *bus; - struct pci_dev *pdev = NULL; - struct acpi_dmar_pci_path *path; - int count; - - bus = pci_find_bus(segment, scope->bus); - path = (struct acpi_dmar_pci_path *)(scope + 1); - count = (scope->length - sizeof(struct acpi_dmar_device_scope)) - / sizeof(struct acpi_dmar_pci_path); - - while (count) { - if (pdev) - pci_dev_put(pdev); - /* - * Some BIOSes list non-exist devices in DMAR table, just - * ignore it - */ - if (!bus) { - pr_warn("Device scope bus [%d] not found\n", scope->bus); - break; - } - pdev = pci_get_slot(bus, PCI_DEVFN(path->dev, path->fn)); - if (!pdev) { - /* warning will be printed below */ - break; - } - path ++; - count --; - bus = pdev->subordinate; - } - if (!pdev) { - pr_warn("Device scope device [%04x:%02x:%02x.%02x] not found\n", - segment, scope->bus, path->dev, path->fn); - *dev = NULL; - return 0; - } - if ((scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT && \ - pdev->subordinate) || (scope->entry_type == \ - ACPI_DMAR_SCOPE_TYPE_BRIDGE && !pdev->subordinate)) { - pci_dev_put(pdev); - pr_warn("Device scope type does not match for %s\n", - pci_name(pdev)); - return -EINVAL; - } - *dev = pdev; - return 0; + list_add_rcu(&drhd->list, &dmar_drhd_units); } -int __init dmar_parse_dev_scope(void *start, void *end, int *cnt, - struct pci_dev ***devices, u16 segment) +void *dmar_alloc_dev_scope(void *start, void *end, int *cnt) { struct acpi_dmar_device_scope *scope; - void * tmp = start; - int index; - int ret; *cnt = 0; while (start < end) { scope = start; - if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT || + if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ACPI || + scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT || scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE) (*cnt)++; - else if (scope->entry_type != ACPI_DMAR_SCOPE_TYPE_IOAPIC) { + else if (scope->entry_type != ACPI_DMAR_SCOPE_TYPE_IOAPIC && + scope->entry_type != ACPI_DMAR_SCOPE_TYPE_HPET) { pr_warn("Unsupported device scope\n"); } start += scope->length; } if (*cnt == 0) - return 0; + return NULL; - *devices = kcalloc(*cnt, sizeof(struct pci_dev *), GFP_KERNEL); - if (!*devices) - return -ENOMEM; + return kcalloc(*cnt, sizeof(struct dmar_dev_scope), GFP_KERNEL); +} - start = tmp; - index = 0; - while (start < end) { +void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt) +{ + int i; + struct device *tmp_dev; + + if (*devices && *cnt) { + for_each_active_dev_scope(*devices, *cnt, i, tmp_dev) + put_device(tmp_dev); + kfree(*devices); + } + + *devices = NULL; + *cnt = 0; +} + +/* Optimize out kzalloc()/kfree() for normal cases */ +static char dmar_pci_notify_info_buf[64]; + +static struct dmar_pci_notify_info * +dmar_alloc_pci_notify_info(struct pci_dev *dev, unsigned long event) +{ + int level = 0; + size_t size; + struct pci_dev *tmp; + struct dmar_pci_notify_info *info; + + BUG_ON(dev->is_virtfn); + + /* Only generate path[] for device addition event */ + if (event == BUS_NOTIFY_ADD_DEVICE) + for (tmp = dev; tmp; tmp = tmp->bus->self) + level++; + + size = sizeof(*info) + level * sizeof(struct acpi_dmar_pci_path); + if (size <= sizeof(dmar_pci_notify_info_buf)) { + info = (struct dmar_pci_notify_info *)dmar_pci_notify_info_buf; + } else { + info = kzalloc(size, GFP_KERNEL); + if (!info) { + pr_warn("Out of memory when allocating notify_info " + "for %s.\n", pci_name(dev)); + if (dmar_dev_scope_status == 0) + dmar_dev_scope_status = -ENOMEM; + return NULL; + } + } + + info->event = event; + info->dev = dev; + info->seg = pci_domain_nr(dev->bus); + info->level = level; + if (event == BUS_NOTIFY_ADD_DEVICE) { + for (tmp = dev; tmp; tmp = tmp->bus->self) { + level--; + info->path[level].device = PCI_SLOT(tmp->devfn); + info->path[level].function = PCI_FUNC(tmp->devfn); + if (pci_is_root_bus(tmp->bus)) + info->bus = tmp->bus->number; + } + } + + return info; +} + +static inline void dmar_free_pci_notify_info(struct dmar_pci_notify_info *info) +{ + if ((void *)info != dmar_pci_notify_info_buf) + kfree(info); +} + +static bool dmar_match_pci_path(struct dmar_pci_notify_info *info, int bus, + struct acpi_dmar_pci_path *path, int count) +{ + int i; + + if (info->bus != bus) + return false; + if (info->level != count) + return false; + + for (i = 0; i < count; i++) { + if (path[i].device != info->path[i].device || + path[i].function != info->path[i].function) + return false; + } + + return true; +} + +/* Return: > 0 if match found, 0 if no match found, < 0 if error happens */ +int dmar_insert_dev_scope(struct dmar_pci_notify_info *info, + void *start, void*end, u16 segment, + struct dmar_dev_scope *devices, + int devices_cnt) +{ + int i, level; + struct device *tmp, *dev = &info->dev->dev; + struct acpi_dmar_device_scope *scope; + struct acpi_dmar_pci_path *path; + + if (segment != info->seg) + return 0; + + for (; start < end; start += scope->length) { scope = start; - if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT || - scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE) { - ret = dmar_parse_one_dev_scope(scope, - &(*devices)[index], segment); - if (ret) { - kfree(*devices); - return ret; - } - index ++; + if (scope->entry_type != ACPI_DMAR_SCOPE_TYPE_ENDPOINT && + scope->entry_type != ACPI_DMAR_SCOPE_TYPE_BRIDGE) + continue; + + path = (struct acpi_dmar_pci_path *)(scope + 1); + level = (scope->length - sizeof(*scope)) / sizeof(*path); + if (!dmar_match_pci_path(info, scope->bus, path, level)) + continue; + + if ((scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT) ^ + (info->dev->hdr_type == PCI_HEADER_TYPE_NORMAL)) { + pr_warn("Device scope type does not match for %s\n", + pci_name(info->dev)); + return -EINVAL; } - start += scope->length; + + for_each_dev_scope(devices, devices_cnt, i, tmp) + if (tmp == NULL) { + devices[i].bus = info->dev->bus->number; + devices[i].devfn = info->dev->devfn; + rcu_assign_pointer(devices[i].dev, + get_device(dev)); + return 1; + } + BUG_ON(i >= devices_cnt); } return 0; } +int dmar_remove_dev_scope(struct dmar_pci_notify_info *info, u16 segment, + struct dmar_dev_scope *devices, int count) +{ + int index; + struct device *tmp; + + if (info->seg != segment) + return 0; + + for_each_active_dev_scope(devices, count, index, tmp) + if (tmp == &info->dev->dev) { + rcu_assign_pointer(devices[index].dev, NULL); + synchronize_rcu(); + put_device(tmp); + return 1; + } + + return 0; +} + +static int dmar_pci_bus_add_dev(struct dmar_pci_notify_info *info) +{ + int ret = 0; + struct dmar_drhd_unit *dmaru; + struct acpi_dmar_hardware_unit *drhd; + + for_each_drhd_unit(dmaru) { + if (dmaru->include_all) + continue; + + drhd = container_of(dmaru->hdr, + struct acpi_dmar_hardware_unit, header); + ret = dmar_insert_dev_scope(info, (void *)(drhd + 1), + ((void *)drhd) + drhd->header.length, + dmaru->segment, + dmaru->devices, dmaru->devices_cnt); + if (ret != 0) + break; + } + if (ret >= 0) + ret = dmar_iommu_notify_scope_dev(info); + if (ret < 0 && dmar_dev_scope_status == 0) + dmar_dev_scope_status = ret; + + return ret; +} + +static void dmar_pci_bus_del_dev(struct dmar_pci_notify_info *info) +{ + struct dmar_drhd_unit *dmaru; + + for_each_drhd_unit(dmaru) + if (dmar_remove_dev_scope(info, dmaru->segment, + dmaru->devices, dmaru->devices_cnt)) + break; + dmar_iommu_notify_scope_dev(info); +} + +static int dmar_pci_bus_notifier(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct pci_dev *pdev = to_pci_dev(data); + struct dmar_pci_notify_info *info; + + /* Only care about add/remove events for physical functions */ + if (pdev->is_virtfn) + return NOTIFY_DONE; + if (action != BUS_NOTIFY_ADD_DEVICE && action != BUS_NOTIFY_DEL_DEVICE) + return NOTIFY_DONE; + + info = dmar_alloc_pci_notify_info(pdev, action); + if (!info) + return NOTIFY_DONE; + + down_write(&dmar_global_lock); + if (action == BUS_NOTIFY_ADD_DEVICE) + dmar_pci_bus_add_dev(info); + else if (action == BUS_NOTIFY_DEL_DEVICE) + dmar_pci_bus_del_dev(info); + up_write(&dmar_global_lock); + + dmar_free_pci_notify_info(info); + + return NOTIFY_OK; +} + +static struct notifier_block dmar_pci_bus_nb = { + .notifier_call = dmar_pci_bus_notifier, + .priority = INT_MIN, +}; + /** * dmar_parse_one_drhd - parses exactly one DMA remapping hardware definition * structure which uniquely represent one DMA remapping hardware unit @@ -180,9 +347,18 @@ dmar_parse_one_drhd(struct acpi_dmar_header *header) dmaru->reg_base_addr = drhd->address; dmaru->segment = drhd->segment; dmaru->include_all = drhd->flags & 0x1; /* BIT0: INCLUDE_ALL */ + dmaru->devices = dmar_alloc_dev_scope((void *)(drhd + 1), + ((void *)drhd) + drhd->header.length, + &dmaru->devices_cnt); + if (dmaru->devices_cnt && dmaru->devices == NULL) { + kfree(dmaru); + return -ENOMEM; + } ret = alloc_iommu(dmaru); if (ret) { + dmar_free_dev_scope(&dmaru->devices, + &dmaru->devices_cnt); kfree(dmaru); return ret; } @@ -190,25 +366,33 @@ dmar_parse_one_drhd(struct acpi_dmar_header *header) return 0; } -static int __init dmar_parse_dev(struct dmar_drhd_unit *dmaru) +static void dmar_free_drhd(struct dmar_drhd_unit *dmaru) { - struct acpi_dmar_hardware_unit *drhd; - int ret = 0; - - drhd = (struct acpi_dmar_hardware_unit *) dmaru->hdr; - - if (dmaru->include_all) - return 0; + if (dmaru->devices && dmaru->devices_cnt) + dmar_free_dev_scope(&dmaru->devices, &dmaru->devices_cnt); + if (dmaru->iommu) + free_iommu(dmaru->iommu); + kfree(dmaru); +} - ret = dmar_parse_dev_scope((void *)(drhd + 1), - ((void *)drhd) + drhd->header.length, - &dmaru->devices_cnt, &dmaru->devices, - drhd->segment); - if (ret) { - list_del(&dmaru->list); - kfree(dmaru); +static int __init dmar_parse_one_andd(struct acpi_dmar_header *header) +{ + struct acpi_dmar_andd *andd = (void *)header; + + /* Check for NUL termination within the designated length */ + if (strnlen(andd->object_name, header->length - 8) == header->length - 8) { + WARN_TAINT(1, TAINT_FIRMWARE_WORKAROUND, + "Your BIOS is broken; ANDD object name is not NUL-terminated\n" + "BIOS vendor: %s; Ver: %s; Product Version: %s\n", + dmi_get_system_info(DMI_BIOS_VENDOR), + dmi_get_system_info(DMI_BIOS_VERSION), + dmi_get_system_info(DMI_PRODUCT_VERSION)); + return -EINVAL; } - return ret; + pr_info("ANDD device: %x name: %s\n", andd->device_number, + andd->object_name); + + return 0; } #ifdef CONFIG_ACPI_NUMA @@ -274,6 +458,10 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header) (unsigned long long)rhsa->base_address, rhsa->proximity_domain); break; + case ACPI_DMAR_TYPE_ANDD: + /* We don't print this here because we need to sanity-check + it first. So print it in dmar_parse_one_andd() instead. */ + break; } } @@ -306,6 +494,7 @@ parse_dmar_table(void) struct acpi_table_dmar *dmar; struct acpi_dmar_header *entry_header; int ret = 0; + int drhd_count = 0; /* * Do it again, earlier dmar_tbl mapping could be mapped with @@ -344,6 +533,7 @@ parse_dmar_table(void) switch (entry_header->type) { case ACPI_DMAR_TYPE_HARDWARE_UNIT: + drhd_count++; ret = dmar_parse_one_drhd(entry_header); break; case ACPI_DMAR_TYPE_RESERVED_MEMORY: @@ -357,6 +547,9 @@ parse_dmar_table(void) ret = dmar_parse_one_rhsa(entry_header); #endif break; + case ACPI_DMAR_TYPE_ANDD: + ret = dmar_parse_one_andd(entry_header); + break; default: pr_warn("Unknown DMAR structure type %d\n", entry_header->type); @@ -368,17 +561,20 @@ parse_dmar_table(void) entry_header = ((void *)entry_header + entry_header->length); } + if (drhd_count == 0) + pr_warn(FW_BUG "No DRHD structure found in DMAR table\n"); return ret; } -static int dmar_pci_device_match(struct pci_dev *devices[], int cnt, - struct pci_dev *dev) +static int dmar_pci_device_match(struct dmar_dev_scope devices[], + int cnt, struct pci_dev *dev) { int index; + struct device *tmp; while (dev) { - for (index = 0; index < cnt; index++) - if (dev == devices[index]) + for_each_active_dev_scope(devices, cnt, index, tmp) + if (dev_is_pci(tmp) && dev == to_pci_dev(tmp)) return 1; /* Check our parent */ @@ -391,56 +587,141 @@ static int dmar_pci_device_match(struct pci_dev *devices[], int cnt, struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev) { - struct dmar_drhd_unit *dmaru = NULL; + struct dmar_drhd_unit *dmaru; struct acpi_dmar_hardware_unit *drhd; dev = pci_physfn(dev); - list_for_each_entry(dmaru, &dmar_drhd_units, list) { + rcu_read_lock(); + for_each_drhd_unit(dmaru) { drhd = container_of(dmaru->hdr, struct acpi_dmar_hardware_unit, header); if (dmaru->include_all && drhd->segment == pci_domain_nr(dev->bus)) - return dmaru; + goto out; if (dmar_pci_device_match(dmaru->devices, dmaru->devices_cnt, dev)) - return dmaru; + goto out; } + dmaru = NULL; +out: + rcu_read_unlock(); - return NULL; + return dmaru; } -int __init dmar_dev_scope_init(void) +static void __init dmar_acpi_insert_dev_scope(u8 device_number, + struct acpi_device *adev) { - static int dmar_dev_scope_initialized; - struct dmar_drhd_unit *drhd, *drhd_n; - int ret = -ENODEV; - - if (dmar_dev_scope_initialized) - return dmar_dev_scope_initialized; + struct dmar_drhd_unit *dmaru; + struct acpi_dmar_hardware_unit *drhd; + struct acpi_dmar_device_scope *scope; + struct device *tmp; + int i; + struct acpi_dmar_pci_path *path; - if (list_empty(&dmar_drhd_units)) - goto fail; + for_each_drhd_unit(dmaru) { + drhd = container_of(dmaru->hdr, + struct acpi_dmar_hardware_unit, + header); - list_for_each_entry_safe(drhd, drhd_n, &dmar_drhd_units, list) { - ret = dmar_parse_dev(drhd); - if (ret) - goto fail; + for (scope = (void *)(drhd + 1); + (unsigned long)scope < ((unsigned long)drhd) + drhd->header.length; + scope = ((void *)scope) + scope->length) { + if (scope->entry_type != ACPI_DMAR_SCOPE_TYPE_ACPI) + continue; + if (scope->enumeration_id != device_number) + continue; + + path = (void *)(scope + 1); + pr_info("ACPI device \"%s\" under DMAR at %llx as %02x:%02x.%d\n", + dev_name(&adev->dev), dmaru->reg_base_addr, + scope->bus, path->device, path->function); + for_each_dev_scope(dmaru->devices, dmaru->devices_cnt, i, tmp) + if (tmp == NULL) { + dmaru->devices[i].bus = scope->bus; + dmaru->devices[i].devfn = PCI_DEVFN(path->device, + path->function); + rcu_assign_pointer(dmaru->devices[i].dev, + get_device(&adev->dev)); + return; + } + BUG_ON(i >= dmaru->devices_cnt); + } } + pr_warn("No IOMMU scope found for ANDD enumeration ID %d (%s)\n", + device_number, dev_name(&adev->dev)); +} - ret = dmar_parse_rmrr_atsr_dev(); - if (ret) - goto fail; +static int __init dmar_acpi_dev_scope_init(void) +{ + struct acpi_dmar_andd *andd; - dmar_dev_scope_initialized = 1; + if (dmar_tbl == NULL) + return -ENODEV; + + for (andd = (void *)dmar_tbl + sizeof(struct acpi_table_dmar); + ((unsigned long)andd) < ((unsigned long)dmar_tbl) + dmar_tbl->length; + andd = ((void *)andd) + andd->header.length) { + if (andd->header.type == ACPI_DMAR_TYPE_ANDD) { + acpi_handle h; + struct acpi_device *adev; + + if (!ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, + andd->object_name, + &h))) { + pr_err("Failed to find handle for ACPI object %s\n", + andd->object_name); + continue; + } + acpi_bus_get_device(h, &adev); + if (!adev) { + pr_err("Failed to get device for ACPI object %s\n", + andd->object_name); + continue; + } + dmar_acpi_insert_dev_scope(andd->device_number, adev); + } + } return 0; +} -fail: - dmar_dev_scope_initialized = ret; - return ret; +int __init dmar_dev_scope_init(void) +{ + struct pci_dev *dev = NULL; + struct dmar_pci_notify_info *info; + + if (dmar_dev_scope_status != 1) + return dmar_dev_scope_status; + + if (list_empty(&dmar_drhd_units)) { + dmar_dev_scope_status = -ENODEV; + } else { + dmar_dev_scope_status = 0; + + dmar_acpi_dev_scope_init(); + + for_each_pci_dev(dev) { + if (dev->is_virtfn) + continue; + + info = dmar_alloc_pci_notify_info(dev, + BUS_NOTIFY_ADD_DEVICE); + if (!info) { + return dmar_dev_scope_status; + } else { + dmar_pci_bus_add_dev(info); + dmar_free_pci_notify_info(info); + } + } + + bus_register_notifier(&pci_bus_type, &dmar_pci_bus_nb); + } + + return dmar_dev_scope_status; } @@ -449,24 +730,23 @@ int __init dmar_table_init(void) static int dmar_table_initialized; int ret; - if (dmar_table_initialized) - return 0; - - dmar_table_initialized = 1; - - ret = parse_dmar_table(); - if (ret) { - if (ret != -ENODEV) - pr_info("parse DMAR table failure.\n"); - return ret; - } + if (dmar_table_initialized == 0) { + ret = parse_dmar_table(); + if (ret < 0) { + if (ret != -ENODEV) + pr_info("parse DMAR table failure.\n"); + } else if (list_empty(&dmar_drhd_units)) { + pr_info("No DMAR devices found\n"); + ret = -ENODEV; + } - if (list_empty(&dmar_drhd_units)) { - pr_info("No DMAR devices found\n"); - return -ENODEV; + if (ret < 0) + dmar_table_initialized = ret; + else + dmar_table_initialized = 1; } - return 0; + return dmar_table_initialized < 0 ? dmar_table_initialized : 0; } static void warn_invalid_dmar(u64 addr, const char *message) @@ -481,7 +761,7 @@ static void warn_invalid_dmar(u64 addr, const char *message) dmi_get_system_info(DMI_PRODUCT_VERSION)); } -int __init check_zero_address(void) +static int __init check_zero_address(void) { struct acpi_table_dmar *dmar; struct acpi_dmar_header *entry_header; @@ -535,18 +815,11 @@ int __init detect_intel_iommu(void) { int ret; + down_write(&dmar_global_lock); ret = dmar_table_detect(); if (ret) ret = check_zero_address(); { - struct acpi_table_dmar *dmar; - - dmar = (struct acpi_table_dmar *) dmar_tbl; - - if (ret && irq_remapping_enabled && cpu_has_x2apic && - dmar->flags & 0x1) - pr_info("Queued invalidation will be enabled to support x2apic and Intr-remapping.\n"); - if (ret && !no_iommu && !iommu_detected && !dmar_disabled) { iommu_detected = 1; /* Make sure ACS will be enabled */ @@ -558,8 +831,9 @@ int __init detect_intel_iommu(void) x86_init.iommu.iommu_init = intel_iommu_init; #endif } - early_acpi_os_unmap_memory(dmar_tbl, dmar_tbl_size); + early_acpi_os_unmap_memory((void __iomem *)dmar_tbl, dmar_tbl_size); dmar_tbl = NULL; + up_write(&dmar_global_lock); return ret ? 1 : -ENODEV; } @@ -640,10 +914,10 @@ out: return err; } -int alloc_iommu(struct dmar_drhd_unit *drhd) +static int alloc_iommu(struct dmar_drhd_unit *drhd) { struct intel_iommu *iommu; - u32 ver; + u32 ver, sts; static int iommu_allocated = 0; int agaw = 0; int msagaw = 0; @@ -682,6 +956,7 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) } iommu->agaw = agaw; iommu->msagaw = msagaw; + iommu->segment = drhd->segment; iommu->node = -1; @@ -693,6 +968,15 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) (unsigned long long)iommu->cap, (unsigned long long)iommu->ecap); + /* Reflect status in gcmd */ + sts = readl(iommu->reg + DMAR_GSTS_REG); + if (sts & DMA_GSTS_IRES) + iommu->gcmd |= DMA_GCMD_IRE; + if (sts & DMA_GSTS_TES) + iommu->gcmd |= DMA_GCMD_TE; + if (sts & DMA_GSTS_QIES) + iommu->gcmd |= DMA_GCMD_QIE; + raw_spin_lock_init(&iommu->register_lock); drhd->iommu = iommu; @@ -705,12 +989,19 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) return err; } -void free_iommu(struct intel_iommu *iommu) +static void free_iommu(struct intel_iommu *iommu) { - if (!iommu) - return; + if (iommu->irq) { + free_irq(iommu->irq, iommu); + irq_set_handler_data(iommu->irq, NULL); + dmar_free_hwirq(iommu->irq); + } - free_dmar_iommu(iommu); + if (iommu->qi) { + free_page((unsigned long)iommu->qi->desc); + kfree(iommu->qi->desc_status); + kfree(iommu->qi); + } if (iommu->reg) unmap_iommu(iommu); @@ -1034,17 +1325,17 @@ int dmar_enable_qi(struct intel_iommu *iommu) desc_page = alloc_pages_node(iommu->node, GFP_ATOMIC | __GFP_ZERO, 0); if (!desc_page) { kfree(qi); - iommu->qi = 0; + iommu->qi = NULL; return -ENOMEM; } qi->desc = page_address(desc_page); - qi->desc_status = kmalloc(QI_LENGTH * sizeof(int), GFP_ATOMIC); + qi->desc_status = kzalloc(QI_LENGTH * sizeof(int), GFP_ATOMIC); if (!qi->desc_status) { free_page((unsigned long) qi->desc); kfree(qi); - iommu->qi = 0; + iommu->qi = NULL; return -ENOMEM; } @@ -1081,6 +1372,7 @@ static const char *dma_remap_fault_reasons[] = "non-zero reserved fields in RTP", "non-zero reserved fields in CTP", "non-zero reserved fields in PTE", + "PCE for translation request specifies blocking", }; static const char *irq_remap_fault_reasons[] = @@ -1094,9 +1386,7 @@ static const char *irq_remap_fault_reasons[] = "Blocked an interrupt request due to source-id verification failure", }; -#define MAX_FAULT_REASON_IDX (ARRAY_SIZE(fault_reason_strings) - 1) - -const char *dmar_get_fault_reason(u8 fault_reason, int *fault_type) +static const char *dmar_get_fault_reason(u8 fault_reason, int *fault_type) { if (fault_reason >= 0x20 && (fault_reason - 0x20 < ARRAY_SIZE(irq_remap_fault_reasons))) { @@ -1201,7 +1491,7 @@ irqreturn_t dmar_fault(int irq, void *dev_id) /* TBD: ignore advanced fault log currently */ if (!(fault_status & DMA_FSTS_PPF)) - goto clear_rest; + goto unlock_exit; fault_index = dma_fsts_fault_record_index(fault_status); reg = cap_fault_reg_offset(iommu->cap); @@ -1242,11 +1532,10 @@ irqreturn_t dmar_fault(int irq, void *dev_id) fault_index = 0; raw_spin_lock_irqsave(&iommu->register_lock, flag); } -clear_rest: - /* clear all the other faults */ - fault_status = readl(iommu->reg + DMAR_FSTS_REG); - writel(fault_status, iommu->reg + DMAR_FSTS_REG); + writel(DMA_FSTS_PFO | DMA_FSTS_PPF, iommu->reg + DMAR_FSTS_REG); + +unlock_exit: raw_spin_unlock_irqrestore(&iommu->register_lock, flag); return IRQ_HANDLED; } @@ -1261,8 +1550,8 @@ int dmar_set_interrupt(struct intel_iommu *iommu) if (iommu->irq) return 0; - irq = create_irq(); - if (!irq) { + irq = dmar_alloc_hwirq(); + if (irq <= 0) { pr_err("IOMMU: no free vectors\n"); return -EINVAL; } @@ -1274,7 +1563,7 @@ int dmar_set_interrupt(struct intel_iommu *iommu) if (ret) { irq_set_handler_data(irq, NULL); iommu->irq = 0; - destroy_irq(irq); + dmar_free_hwirq(irq); return ret; } @@ -1287,14 +1576,14 @@ int dmar_set_interrupt(struct intel_iommu *iommu) int __init enable_drhd_fault_handling(void) { struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; /* * Enable fault control interrupt. */ - for_each_drhd_unit(drhd) { - int ret; - struct intel_iommu *iommu = drhd->iommu; - ret = dmar_set_interrupt(iommu); + for_each_iommu(iommu, drhd) { + u32 fault_status; + int ret = dmar_set_interrupt(iommu); if (ret) { pr_err("DRHD %Lx: failed to enable fault, interrupt, ret %d\n", @@ -1306,6 +1595,8 @@ int __init enable_drhd_fault_handling(void) * Clear any previous faults. */ dmar_fault(iommu->irq, iommu); + fault_status = readl(iommu->reg + DMAR_FSTS_REG); + writel(fault_status, iommu->reg + DMAR_FSTS_REG); } return 0; @@ -1347,4 +1638,27 @@ int __init dmar_ir_support(void) return 0; return dmar->flags & 0x1; } + +static int __init dmar_free_unused_resources(void) +{ + struct dmar_drhd_unit *dmaru, *dmaru_n; + + /* DMAR units are in use */ + if (irq_remapping_enabled || intel_iommu_enabled) + return 0; + + if (dmar_dev_scope_status != 1 && !list_empty(&dmar_drhd_units)) + bus_unregister_notifier(&pci_bus_type, &dmar_pci_bus_nb); + + down_write(&dmar_global_lock); + list_for_each_entry_safe(dmaru, dmaru_n, &dmar_drhd_units, list) { + list_del(&dmaru->list); + dmar_free_drhd(dmaru); + } + up_write(&dmar_global_lock); + + return 0; +} + +late_initcall(dmar_free_unused_resources); IOMMU_INIT_POST(detect_intel_iommu); diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 7fe44f83cc3..99054d2c040 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -29,7 +29,8 @@ #include <asm/cacheflush.h> #include <asm/pgtable.h> -#include <mach/sysmmu.h> +typedef u32 sysmmu_iova_t; +typedef u32 sysmmu_pte_t; /* We does not consider super section mapping (16MB) */ #define SECT_ORDER 20 @@ -44,28 +45,44 @@ #define LPAGE_MASK (~(LPAGE_SIZE - 1)) #define SPAGE_MASK (~(SPAGE_SIZE - 1)) -#define lv1ent_fault(sent) (((*(sent) & 3) == 0) || ((*(sent) & 3) == 3)) -#define lv1ent_page(sent) ((*(sent) & 3) == 1) +#define lv1ent_fault(sent) ((*(sent) == ZERO_LV2LINK) || \ + ((*(sent) & 3) == 0) || ((*(sent) & 3) == 3)) +#define lv1ent_zero(sent) (*(sent) == ZERO_LV2LINK) +#define lv1ent_page_zero(sent) ((*(sent) & 3) == 1) +#define lv1ent_page(sent) ((*(sent) != ZERO_LV2LINK) && \ + ((*(sent) & 3) == 1)) #define lv1ent_section(sent) ((*(sent) & 3) == 2) #define lv2ent_fault(pent) ((*(pent) & 3) == 0) #define lv2ent_small(pent) ((*(pent) & 2) == 2) #define lv2ent_large(pent) ((*(pent) & 3) == 1) +static u32 sysmmu_page_offset(sysmmu_iova_t iova, u32 size) +{ + return iova & (size - 1); +} + #define section_phys(sent) (*(sent) & SECT_MASK) -#define section_offs(iova) ((iova) & 0xFFFFF) +#define section_offs(iova) sysmmu_page_offset((iova), SECT_SIZE) #define lpage_phys(pent) (*(pent) & LPAGE_MASK) -#define lpage_offs(iova) ((iova) & 0xFFFF) +#define lpage_offs(iova) sysmmu_page_offset((iova), LPAGE_SIZE) #define spage_phys(pent) (*(pent) & SPAGE_MASK) -#define spage_offs(iova) ((iova) & 0xFFF) - -#define lv1ent_offset(iova) ((iova) >> SECT_ORDER) -#define lv2ent_offset(iova) (((iova) & 0xFF000) >> SPAGE_ORDER) +#define spage_offs(iova) sysmmu_page_offset((iova), SPAGE_SIZE) #define NUM_LV1ENTRIES 4096 -#define NUM_LV2ENTRIES 256 +#define NUM_LV2ENTRIES (SECT_SIZE / SPAGE_SIZE) + +static u32 lv1ent_offset(sysmmu_iova_t iova) +{ + return iova >> SECT_ORDER; +} + +static u32 lv2ent_offset(sysmmu_iova_t iova) +{ + return (iova >> SPAGE_ORDER) & (NUM_LV2ENTRIES - 1); +} -#define LV2TABLE_SIZE (NUM_LV2ENTRIES * sizeof(long)) +#define LV2TABLE_SIZE (NUM_LV2ENTRIES * sizeof(sysmmu_pte_t)) #define SPAGES_PER_LPAGE (LPAGE_SIZE / SPAGE_SIZE) @@ -80,6 +97,13 @@ #define CTRL_BLOCK 0x7 #define CTRL_DISABLE 0x0 +#define CFG_LRU 0x1 +#define CFG_QOS(n) ((n & 0xF) << 7) +#define CFG_MASK 0x0150FFFF /* Selecting bit 0-15, 20, 22 and 24 */ +#define CFG_ACGEN (1 << 24) /* System MMU 3.3 only */ +#define CFG_SYSSEL (1 << 22) /* System MMU 3.2 only */ +#define CFG_FLPDCACHE (1 << 20) /* System MMU 3.2+ only */ + #define REG_MMU_CTRL 0x000 #define REG_MMU_CFG 0x004 #define REG_MMU_STATUS 0x008 @@ -96,19 +120,32 @@ #define REG_MMU_VERSION 0x034 +#define MMU_MAJ_VER(val) ((val) >> 7) +#define MMU_MIN_VER(val) ((val) & 0x7F) +#define MMU_RAW_VER(reg) (((reg) >> 21) & ((1 << 11) - 1)) /* 11 bits */ + +#define MAKE_MMU_VER(maj, min) ((((maj) & 0xF) << 7) | ((min) & 0x7F)) + #define REG_PB0_SADDR 0x04C #define REG_PB0_EADDR 0x050 #define REG_PB1_SADDR 0x054 #define REG_PB1_EADDR 0x058 -static unsigned long *section_entry(unsigned long *pgtable, unsigned long iova) +#define has_sysmmu(dev) (dev->archdata.iommu != NULL) + +static struct kmem_cache *lv2table_kmem_cache; +static sysmmu_pte_t *zero_lv2_table; +#define ZERO_LV2LINK mk_lv1ent_page(virt_to_phys(zero_lv2_table)) + +static sysmmu_pte_t *section_entry(sysmmu_pte_t *pgtable, sysmmu_iova_t iova) { return pgtable + lv1ent_offset(iova); } -static unsigned long *page_entry(unsigned long *sent, unsigned long iova) +static sysmmu_pte_t *page_entry(sysmmu_pte_t *sent, sysmmu_iova_t iova) { - return (unsigned long *)__va(lv2table_base(sent)) + lv2ent_offset(iova); + return (sysmmu_pte_t *)phys_to_virt( + lv2table_base(sent)) + lv2ent_offset(iova); } enum exynos_sysmmu_inttype { @@ -124,16 +161,6 @@ enum exynos_sysmmu_inttype { SYSMMU_FAULTS_NUM }; -/* - * @itype: type of fault. - * @pgtable_base: the physical address of page table base. This is 0 if @itype - * is SYSMMU_BUSERROR. - * @fault_addr: the device (virtual) address that the System MMU tried to - * translated. This is 0 if @itype is SYSMMU_BUSERROR. - */ -typedef int (*sysmmu_fault_handler_t)(enum exynos_sysmmu_inttype itype, - unsigned long pgtable_base, unsigned long fault_addr); - static unsigned short fault_reg_offset[SYSMMU_FAULTS_NUM] = { REG_PAGE_FAULT_ADDR, REG_AR_FAULT_ADDR, @@ -157,27 +184,34 @@ static char *sysmmu_fault_name[SYSMMU_FAULTS_NUM] = { "UNKNOWN FAULT" }; +/* attached to dev.archdata.iommu of the master device */ +struct exynos_iommu_owner { + struct list_head client; /* entry of exynos_iommu_domain.clients */ + struct device *dev; + struct device *sysmmu; + struct iommu_domain *domain; + void *vmm_data; /* IO virtual memory manager's data */ + spinlock_t lock; /* Lock to preserve consistency of System MMU */ +}; + struct exynos_iommu_domain { struct list_head clients; /* list of sysmmu_drvdata.node */ - unsigned long *pgtable; /* lv1 page table, 16KB */ + sysmmu_pte_t *pgtable; /* lv1 page table, 16KB */ short *lv2entcnt; /* free lv2 entry counter for each section */ spinlock_t lock; /* lock for this structure */ spinlock_t pgtablelock; /* lock for modifying page table @ pgtable */ }; struct sysmmu_drvdata { - struct list_head node; /* entry of exynos_iommu_domain.clients */ struct device *sysmmu; /* System MMU's device descriptor */ - struct device *dev; /* Owner of system MMU */ - char *dbgname; - int nsfrs; - void __iomem **sfrbases; - struct clk *clk[2]; + struct device *master; /* Owner of system MMU */ + void __iomem *sfrbase; + struct clk *clk; + struct clk *clk_master; int activations; - rwlock_t lock; + spinlock_t lock; struct iommu_domain *domain; - sysmmu_fault_handler_t fault_handler; - unsigned long pgtable; + phys_addr_t pgtable; }; static bool set_sysmmu_active(struct sysmmu_drvdata *data) @@ -204,6 +238,11 @@ static void sysmmu_unblock(void __iomem *sfrbase) __raw_writel(CTRL_ENABLE, sfrbase + REG_MMU_CTRL); } +static unsigned int __raw_sysmmu_version(struct sysmmu_drvdata *data) +{ + return MMU_RAW_VER(__raw_readl(data->sfrbase + REG_MMU_VERSION)); +} + static bool sysmmu_block(void __iomem *sfrbase) { int i = 120; @@ -226,207 +265,203 @@ static void __sysmmu_tlb_invalidate(void __iomem *sfrbase) } static void __sysmmu_tlb_invalidate_entry(void __iomem *sfrbase, - unsigned long iova) + sysmmu_iova_t iova, unsigned int num_inv) { - __raw_writel((iova & SPAGE_MASK) | 1, sfrbase + REG_MMU_FLUSH_ENTRY); + unsigned int i; + + for (i = 0; i < num_inv; i++) { + __raw_writel((iova & SPAGE_MASK) | 1, + sfrbase + REG_MMU_FLUSH_ENTRY); + iova += SPAGE_SIZE; + } } static void __sysmmu_set_ptbase(void __iomem *sfrbase, - unsigned long pgd) + phys_addr_t pgd) { - __raw_writel(0x1, sfrbase + REG_MMU_CFG); /* 16KB LV1, LRU */ __raw_writel(pgd, sfrbase + REG_PT_BASE_ADDR); __sysmmu_tlb_invalidate(sfrbase); } -static void __sysmmu_set_prefbuf(void __iomem *sfrbase, unsigned long base, - unsigned long size, int idx) +static void show_fault_information(const char *name, + enum exynos_sysmmu_inttype itype, + phys_addr_t pgtable_base, sysmmu_iova_t fault_addr) { - __raw_writel(base, sfrbase + REG_PB0_SADDR + idx * 8); - __raw_writel(size - 1 + base, sfrbase + REG_PB0_EADDR + idx * 8); -} + sysmmu_pte_t *ent; -void exynos_sysmmu_set_prefbuf(struct device *dev, - unsigned long base0, unsigned long size0, - unsigned long base1, unsigned long size1) -{ - struct sysmmu_drvdata *data = dev_get_drvdata(dev->archdata.iommu); - unsigned long flags; - int i; + if ((itype >= SYSMMU_FAULTS_NUM) || (itype < SYSMMU_PAGEFAULT)) + itype = SYSMMU_FAULT_UNKNOWN; - BUG_ON((base0 + size0) <= base0); - BUG_ON((size1 > 0) && ((base1 + size1) <= base1)); - - read_lock_irqsave(&data->lock, flags); - if (!is_sysmmu_active(data)) - goto finish; - - for (i = 0; i < data->nsfrs; i++) { - if ((readl(data->sfrbases[i] + REG_MMU_VERSION) >> 28) == 3) { - if (!sysmmu_block(data->sfrbases[i])) - continue; - - if (size1 == 0) { - if (size0 <= SZ_128K) { - base1 = base0; - size1 = size0; - } else { - size1 = size0 - - ALIGN(size0 / 2, SZ_64K); - size0 = size0 - size1; - base1 = base0 + size0; - } - } + pr_err("%s occurred at %#x by %s(Page table base: %pa)\n", + sysmmu_fault_name[itype], fault_addr, name, &pgtable_base); - __sysmmu_set_prefbuf( - data->sfrbases[i], base0, size0, 0); - __sysmmu_set_prefbuf( - data->sfrbases[i], base1, size1, 1); + ent = section_entry(phys_to_virt(pgtable_base), fault_addr); + pr_err("\tLv1 entry: %#x\n", *ent); - sysmmu_unblock(data->sfrbases[i]); - } + if (lv1ent_page(ent)) { + ent = page_entry(ent, fault_addr); + pr_err("\t Lv2 entry: %#x\n", *ent); } -finish: - read_unlock_irqrestore(&data->lock, flags); } -static void __set_fault_handler(struct sysmmu_drvdata *data, - sysmmu_fault_handler_t handler) +static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id) { - unsigned long flags; + /* SYSMMU is in blocked when interrupt occurred. */ + struct sysmmu_drvdata *data = dev_id; + enum exynos_sysmmu_inttype itype; + sysmmu_iova_t addr = -1; + int ret = -ENOSYS; - write_lock_irqsave(&data->lock, flags); - data->fault_handler = handler; - write_unlock_irqrestore(&data->lock, flags); -} + WARN_ON(!is_sysmmu_active(data)); -void exynos_sysmmu_set_fault_handler(struct device *dev, - sysmmu_fault_handler_t handler) -{ - struct sysmmu_drvdata *data = dev_get_drvdata(dev->archdata.iommu); + spin_lock(&data->lock); - __set_fault_handler(data, handler); -} + if (!IS_ERR(data->clk_master)) + clk_enable(data->clk_master); -static int default_fault_handler(enum exynos_sysmmu_inttype itype, - unsigned long pgtable_base, unsigned long fault_addr) -{ - unsigned long *ent; - - if ((itype >= SYSMMU_FAULTS_NUM) || (itype < SYSMMU_PAGEFAULT)) + itype = (enum exynos_sysmmu_inttype) + __ffs(__raw_readl(data->sfrbase + REG_INT_STATUS)); + if (WARN_ON(!((itype >= 0) && (itype < SYSMMU_FAULT_UNKNOWN)))) itype = SYSMMU_FAULT_UNKNOWN; + else + addr = __raw_readl(data->sfrbase + fault_reg_offset[itype]); + + if (itype == SYSMMU_FAULT_UNKNOWN) { + pr_err("%s: Fault is not occurred by System MMU '%s'!\n", + __func__, dev_name(data->sysmmu)); + pr_err("%s: Please check if IRQ is correctly configured.\n", + __func__); + BUG(); + } else { + unsigned int base = + __raw_readl(data->sfrbase + REG_PT_BASE_ADDR); + show_fault_information(dev_name(data->sysmmu), + itype, base, addr); + if (data->domain) + ret = report_iommu_fault(data->domain, + data->master, addr, itype); + } - pr_err("%s occurred at 0x%lx(Page table base: 0x%lx)\n", - sysmmu_fault_name[itype], fault_addr, pgtable_base); + /* fault is not recovered by fault handler */ + BUG_ON(ret != 0); - ent = section_entry(__va(pgtable_base), fault_addr); - pr_err("\tLv1 entry: 0x%lx\n", *ent); + __raw_writel(1 << itype, data->sfrbase + REG_INT_CLEAR); - if (lv1ent_page(ent)) { - ent = page_entry(ent, fault_addr); - pr_err("\t Lv2 entry: 0x%lx\n", *ent); - } + sysmmu_unblock(data->sfrbase); - pr_err("Generating Kernel OOPS... because it is unrecoverable.\n"); + if (!IS_ERR(data->clk_master)) + clk_disable(data->clk_master); - BUG(); + spin_unlock(&data->lock); - return 0; + return IRQ_HANDLED; } -static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id) +static void __sysmmu_disable_nocount(struct sysmmu_drvdata *data) { - /* SYSMMU is in blocked when interrupt occurred. */ - struct sysmmu_drvdata *data = dev_id; - struct resource *irqres; - struct platform_device *pdev; - enum exynos_sysmmu_inttype itype; - unsigned long addr = -1; + if (!IS_ERR(data->clk_master)) + clk_enable(data->clk_master); + + __raw_writel(CTRL_DISABLE, data->sfrbase + REG_MMU_CTRL); + __raw_writel(0, data->sfrbase + REG_MMU_CFG); - int i, ret = -ENOSYS; + clk_disable(data->clk); + if (!IS_ERR(data->clk_master)) + clk_disable(data->clk_master); +} - read_lock(&data->lock); +static bool __sysmmu_disable(struct sysmmu_drvdata *data) +{ + bool disabled; + unsigned long flags; - WARN_ON(!is_sysmmu_active(data)); + spin_lock_irqsave(&data->lock, flags); - pdev = to_platform_device(data->sysmmu); - for (i = 0; i < (pdev->num_resources / 2); i++) { - irqres = platform_get_resource(pdev, IORESOURCE_IRQ, i); - if (irqres && ((int)irqres->start == irq)) - break; - } + disabled = set_sysmmu_inactive(data); - if (i == pdev->num_resources) { - itype = SYSMMU_FAULT_UNKNOWN; - } else { - itype = (enum exynos_sysmmu_inttype) - __ffs(__raw_readl(data->sfrbases[i] + REG_INT_STATUS)); - if (WARN_ON(!((itype >= 0) && (itype < SYSMMU_FAULT_UNKNOWN)))) - itype = SYSMMU_FAULT_UNKNOWN; - else - addr = __raw_readl( - data->sfrbases[i] + fault_reg_offset[itype]); + if (disabled) { + data->pgtable = 0; + data->domain = NULL; + + __sysmmu_disable_nocount(data); + + dev_dbg(data->sysmmu, "Disabled\n"); + } else { + dev_dbg(data->sysmmu, "%d times left to disable\n", + data->activations); } - if (data->domain) - ret = report_iommu_fault(data->domain, data->dev, - addr, itype); + spin_unlock_irqrestore(&data->lock, flags); - if ((ret == -ENOSYS) && data->fault_handler) { - unsigned long base = data->pgtable; - if (itype != SYSMMU_FAULT_UNKNOWN) - base = __raw_readl( - data->sfrbases[i] + REG_PT_BASE_ADDR); - ret = data->fault_handler(itype, base, addr); + return disabled; +} + +static void __sysmmu_init_config(struct sysmmu_drvdata *data) +{ + unsigned int cfg = CFG_LRU | CFG_QOS(15); + unsigned int ver; + + ver = __raw_sysmmu_version(data); + if (MMU_MAJ_VER(ver) == 3) { + if (MMU_MIN_VER(ver) >= 2) { + cfg |= CFG_FLPDCACHE; + if (MMU_MIN_VER(ver) == 3) { + cfg |= CFG_ACGEN; + cfg &= ~CFG_LRU; + } else { + cfg |= CFG_SYSSEL; + } + } } - if (!ret && (itype != SYSMMU_FAULT_UNKNOWN)) - __raw_writel(1 << itype, data->sfrbases[i] + REG_INT_CLEAR); - else - dev_dbg(data->sysmmu, "(%s) %s is not handled.\n", - data->dbgname, sysmmu_fault_name[itype]); + __raw_writel(cfg, data->sfrbase + REG_MMU_CFG); +} - if (itype != SYSMMU_FAULT_UNKNOWN) - sysmmu_unblock(data->sfrbases[i]); +static void __sysmmu_enable_nocount(struct sysmmu_drvdata *data) +{ + if (!IS_ERR(data->clk_master)) + clk_enable(data->clk_master); + clk_enable(data->clk); - read_unlock(&data->lock); + __raw_writel(CTRL_BLOCK, data->sfrbase + REG_MMU_CTRL); - return IRQ_HANDLED; + __sysmmu_init_config(data); + + __sysmmu_set_ptbase(data->sfrbase, data->pgtable); + + __raw_writel(CTRL_ENABLE, data->sfrbase + REG_MMU_CTRL); + + if (!IS_ERR(data->clk_master)) + clk_disable(data->clk_master); } -static bool __exynos_sysmmu_disable(struct sysmmu_drvdata *data) +static int __sysmmu_enable(struct sysmmu_drvdata *data, + phys_addr_t pgtable, struct iommu_domain *domain) { + int ret = 0; unsigned long flags; - bool disabled = false; - int i; - write_lock_irqsave(&data->lock, flags); + spin_lock_irqsave(&data->lock, flags); + if (set_sysmmu_active(data)) { + data->pgtable = pgtable; + data->domain = domain; - if (!set_sysmmu_inactive(data)) - goto finish; + __sysmmu_enable_nocount(data); - for (i = 0; i < data->nsfrs; i++) - __raw_writel(CTRL_DISABLE, data->sfrbases[i] + REG_MMU_CTRL); + dev_dbg(data->sysmmu, "Enabled\n"); + } else { + ret = (pgtable == data->pgtable) ? 1 : -EBUSY; - if (data->clk[1]) - clk_disable(data->clk[1]); - if (data->clk[0]) - clk_disable(data->clk[0]); + dev_dbg(data->sysmmu, "already enabled\n"); + } - disabled = true; - data->pgtable = 0; - data->domain = NULL; -finish: - write_unlock_irqrestore(&data->lock, flags); + if (WARN_ON(ret < 0)) + set_sysmmu_inactive(data); /* decrement count */ - if (disabled) - dev_dbg(data->sysmmu, "(%s) Disabled\n", data->dbgname); - else - dev_dbg(data->sysmmu, "(%s) %d times left to be disabled\n", - data->dbgname, data->activations); + spin_unlock_irqrestore(&data->lock, flags); - return disabled; + return ret; } /* __exynos_sysmmu_enable: Enables System MMU @@ -435,269 +470,223 @@ finish: * 0 if the System MMU has been just enabled and 1 if System MMU was already * enabled before. */ -static int __exynos_sysmmu_enable(struct sysmmu_drvdata *data, - unsigned long pgtable, struct iommu_domain *domain) +static int __exynos_sysmmu_enable(struct device *dev, phys_addr_t pgtable, + struct iommu_domain *domain) { - int i, ret = 0; + int ret = 0; unsigned long flags; + struct exynos_iommu_owner *owner = dev->archdata.iommu; + struct sysmmu_drvdata *data; - write_lock_irqsave(&data->lock, flags); + BUG_ON(!has_sysmmu(dev)); - if (!set_sysmmu_active(data)) { - if (WARN_ON(pgtable != data->pgtable)) { - ret = -EBUSY; - set_sysmmu_inactive(data); - } else { - ret = 1; - } + spin_lock_irqsave(&owner->lock, flags); - dev_dbg(data->sysmmu, "(%s) Already enabled\n", data->dbgname); - goto finish; - } + data = dev_get_drvdata(owner->sysmmu); - if (data->clk[0]) - clk_enable(data->clk[0]); - if (data->clk[1]) - clk_enable(data->clk[1]); + ret = __sysmmu_enable(data, pgtable, domain); + if (ret >= 0) + data->master = dev; - data->pgtable = pgtable; + spin_unlock_irqrestore(&owner->lock, flags); - for (i = 0; i < data->nsfrs; i++) { - __sysmmu_set_ptbase(data->sfrbases[i], pgtable); + return ret; +} - if ((readl(data->sfrbases[i] + REG_MMU_VERSION) >> 28) == 3) { - /* System MMU version is 3.x */ - __raw_writel((1 << 12) | (2 << 28), - data->sfrbases[i] + REG_MMU_CFG); - __sysmmu_set_prefbuf(data->sfrbases[i], 0, -1, 0); - __sysmmu_set_prefbuf(data->sfrbases[i], 0, -1, 1); - } +int exynos_sysmmu_enable(struct device *dev, phys_addr_t pgtable) +{ + BUG_ON(!memblock_is_memory(pgtable)); - __raw_writel(CTRL_ENABLE, data->sfrbases[i] + REG_MMU_CTRL); - } + return __exynos_sysmmu_enable(dev, pgtable, NULL); +} - data->domain = domain; +static bool exynos_sysmmu_disable(struct device *dev) +{ + unsigned long flags; + bool disabled = true; + struct exynos_iommu_owner *owner = dev->archdata.iommu; + struct sysmmu_drvdata *data; - dev_dbg(data->sysmmu, "(%s) Enabled\n", data->dbgname); -finish: - write_unlock_irqrestore(&data->lock, flags); + BUG_ON(!has_sysmmu(dev)); - return ret; -} + spin_lock_irqsave(&owner->lock, flags); -int exynos_sysmmu_enable(struct device *dev, unsigned long pgtable) -{ - struct sysmmu_drvdata *data = dev_get_drvdata(dev->archdata.iommu); - int ret; + data = dev_get_drvdata(owner->sysmmu); - BUG_ON(!memblock_is_memory(pgtable)); + disabled = __sysmmu_disable(data); + if (disabled) + data->master = NULL; - ret = pm_runtime_get_sync(data->sysmmu); - if (ret < 0) { - dev_dbg(data->sysmmu, "(%s) Failed to enable\n", data->dbgname); - return ret; - } + spin_unlock_irqrestore(&owner->lock, flags); - ret = __exynos_sysmmu_enable(data, pgtable, NULL); - if (WARN_ON(ret < 0)) { - pm_runtime_put(data->sysmmu); - dev_err(data->sysmmu, - "(%s) Already enabled with page table %#lx\n", - data->dbgname, data->pgtable); - } else { - data->dev = dev; - } + return disabled; +} - return ret; +static void __sysmmu_tlb_invalidate_flpdcache(struct sysmmu_drvdata *data, + sysmmu_iova_t iova) +{ + if (__raw_sysmmu_version(data) == MAKE_MMU_VER(3, 3)) + __raw_writel(iova | 0x1, data->sfrbase + REG_MMU_FLUSH_ENTRY); } -bool exynos_sysmmu_disable(struct device *dev) +static void sysmmu_tlb_invalidate_flpdcache(struct device *dev, + sysmmu_iova_t iova) { - struct sysmmu_drvdata *data = dev_get_drvdata(dev->archdata.iommu); - bool disabled; + unsigned long flags; + struct exynos_iommu_owner *owner = dev->archdata.iommu; + struct sysmmu_drvdata *data = dev_get_drvdata(owner->sysmmu); - disabled = __exynos_sysmmu_disable(data); - pm_runtime_put(data->sysmmu); + if (!IS_ERR(data->clk_master)) + clk_enable(data->clk_master); - return disabled; + spin_lock_irqsave(&data->lock, flags); + if (is_sysmmu_active(data)) + __sysmmu_tlb_invalidate_flpdcache(data, iova); + spin_unlock_irqrestore(&data->lock, flags); + + if (!IS_ERR(data->clk_master)) + clk_disable(data->clk_master); } -static void sysmmu_tlb_invalidate_entry(struct device *dev, unsigned long iova) +static void sysmmu_tlb_invalidate_entry(struct device *dev, sysmmu_iova_t iova, + size_t size) { + struct exynos_iommu_owner *owner = dev->archdata.iommu; unsigned long flags; - struct sysmmu_drvdata *data = dev_get_drvdata(dev->archdata.iommu); + struct sysmmu_drvdata *data; - read_lock_irqsave(&data->lock, flags); + data = dev_get_drvdata(owner->sysmmu); + spin_lock_irqsave(&data->lock, flags); if (is_sysmmu_active(data)) { - int i; - for (i = 0; i < data->nsfrs; i++) { - if (sysmmu_block(data->sfrbases[i])) { - __sysmmu_tlb_invalidate_entry( - data->sfrbases[i], iova); - sysmmu_unblock(data->sfrbases[i]); - } + unsigned int num_inv = 1; + + if (!IS_ERR(data->clk_master)) + clk_enable(data->clk_master); + + /* + * L2TLB invalidation required + * 4KB page: 1 invalidation + * 64KB page: 16 invalidation + * 1MB page: 64 invalidation + * because it is set-associative TLB + * with 8-way and 64 sets. + * 1MB page can be cached in one of all sets. + * 64KB page can be one of 16 consecutive sets. + */ + if (MMU_MAJ_VER(__raw_sysmmu_version(data)) == 2) + num_inv = min_t(unsigned int, size / PAGE_SIZE, 64); + + if (sysmmu_block(data->sfrbase)) { + __sysmmu_tlb_invalidate_entry( + data->sfrbase, iova, num_inv); + sysmmu_unblock(data->sfrbase); } + if (!IS_ERR(data->clk_master)) + clk_disable(data->clk_master); } else { - dev_dbg(data->sysmmu, - "(%s) Disabled. Skipping invalidating TLB.\n", - data->dbgname); + dev_dbg(dev, "disabled. Skipping TLB invalidation @ %#x\n", + iova); } - - read_unlock_irqrestore(&data->lock, flags); + spin_unlock_irqrestore(&data->lock, flags); } void exynos_sysmmu_tlb_invalidate(struct device *dev) { + struct exynos_iommu_owner *owner = dev->archdata.iommu; unsigned long flags; - struct sysmmu_drvdata *data = dev_get_drvdata(dev->archdata.iommu); + struct sysmmu_drvdata *data; - read_lock_irqsave(&data->lock, flags); + data = dev_get_drvdata(owner->sysmmu); + spin_lock_irqsave(&data->lock, flags); if (is_sysmmu_active(data)) { - int i; - for (i = 0; i < data->nsfrs; i++) { - if (sysmmu_block(data->sfrbases[i])) { - __sysmmu_tlb_invalidate(data->sfrbases[i]); - sysmmu_unblock(data->sfrbases[i]); - } + if (!IS_ERR(data->clk_master)) + clk_enable(data->clk_master); + if (sysmmu_block(data->sfrbase)) { + __sysmmu_tlb_invalidate(data->sfrbase); + sysmmu_unblock(data->sfrbase); } + if (!IS_ERR(data->clk_master)) + clk_disable(data->clk_master); } else { - dev_dbg(data->sysmmu, - "(%s) Disabled. Skipping invalidating TLB.\n", - data->dbgname); + dev_dbg(dev, "disabled. Skipping TLB invalidation\n"); } - - read_unlock_irqrestore(&data->lock, flags); + spin_unlock_irqrestore(&data->lock, flags); } -static int exynos_sysmmu_probe(struct platform_device *pdev) +static int __init exynos_sysmmu_probe(struct platform_device *pdev) { - int i, ret; - struct device *dev; + int irq, ret; + struct device *dev = &pdev->dev; struct sysmmu_drvdata *data; + struct resource *res; - dev = &pdev->dev; + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (!data) { - dev_dbg(dev, "Not enough memory\n"); - ret = -ENOMEM; - goto err_alloc; - } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->sfrbase = devm_ioremap_resource(dev, res); + if (IS_ERR(data->sfrbase)) + return PTR_ERR(data->sfrbase); - ret = dev_set_drvdata(dev, data); - if (ret) { - dev_dbg(dev, "Unabled to initialize driver data\n"); - goto err_init; + irq = platform_get_irq(pdev, 0); + if (irq <= 0) { + dev_err(dev, "Unable to find IRQ resource\n"); + return irq; } - data->nsfrs = pdev->num_resources / 2; - data->sfrbases = kmalloc(sizeof(*data->sfrbases) * data->nsfrs, - GFP_KERNEL); - if (data->sfrbases == NULL) { - dev_dbg(dev, "Not enough memory\n"); - ret = -ENOMEM; - goto err_init; - } - - for (i = 0; i < data->nsfrs; i++) { - struct resource *res; - res = platform_get_resource(pdev, IORESOURCE_MEM, i); - if (!res) { - dev_dbg(dev, "Unable to find IOMEM region\n"); - ret = -ENOENT; - goto err_res; - } - - data->sfrbases[i] = ioremap(res->start, resource_size(res)); - if (!data->sfrbases[i]) { - dev_dbg(dev, "Unable to map IOMEM @ PA:%#x\n", - res->start); - ret = -ENOENT; - goto err_res; - } + ret = devm_request_irq(dev, irq, exynos_sysmmu_irq, 0, + dev_name(dev), data); + if (ret) { + dev_err(dev, "Unabled to register handler of irq %d\n", irq); + return ret; } - for (i = 0; i < data->nsfrs; i++) { - ret = platform_get_irq(pdev, i); - if (ret <= 0) { - dev_dbg(dev, "Unable to find IRQ resource\n"); - goto err_irq; - } - - ret = request_irq(ret, exynos_sysmmu_irq, 0, - dev_name(dev), data); + data->clk = devm_clk_get(dev, "sysmmu"); + if (IS_ERR(data->clk)) { + dev_err(dev, "Failed to get clock!\n"); + return PTR_ERR(data->clk); + } else { + ret = clk_prepare(data->clk); if (ret) { - dev_dbg(dev, "Unabled to register interrupt handler\n"); - goto err_irq; + dev_err(dev, "Failed to prepare clk\n"); + return ret; } } - if (dev_get_platdata(dev)) { - char *deli, *beg; - struct sysmmu_platform_data *platdata = dev_get_platdata(dev); - - beg = platdata->clockname; - - for (deli = beg; (*deli != '\0') && (*deli != ','); deli++) - /* NOTHING */; - - if (*deli == '\0') - deli = NULL; - else - *deli = '\0'; - - data->clk[0] = clk_get(dev, beg); - if (IS_ERR(data->clk[0])) { - data->clk[0] = NULL; - dev_dbg(dev, "No clock descriptor registered\n"); - } - - if (data->clk[0] && deli) { - *deli = ','; - data->clk[1] = clk_get(dev, deli + 1); - if (IS_ERR(data->clk[1])) - data->clk[1] = NULL; + data->clk_master = devm_clk_get(dev, "master"); + if (!IS_ERR(data->clk_master)) { + ret = clk_prepare(data->clk_master); + if (ret) { + clk_unprepare(data->clk); + dev_err(dev, "Failed to prepare master's clk\n"); + return ret; } - - data->dbgname = platdata->dbgname; } data->sysmmu = dev; - rwlock_init(&data->lock); - INIT_LIST_HEAD(&data->node); + spin_lock_init(&data->lock); - __set_fault_handler(data, &default_fault_handler); + platform_set_drvdata(pdev, data); - if (dev->parent) - pm_runtime_enable(dev); + pm_runtime_enable(dev); - dev_dbg(dev, "(%s) Initialized\n", data->dbgname); return 0; -err_irq: - while (i-- > 0) { - int irq; - - irq = platform_get_irq(pdev, i); - free_irq(irq, data); - } -err_res: - while (data->nsfrs-- > 0) - iounmap(data->sfrbases[data->nsfrs]); - kfree(data->sfrbases); -err_init: - kfree(data); -err_alloc: - dev_err(dev, "Failed to initialize\n"); - return ret; } -static struct platform_driver exynos_sysmmu_driver = { - .probe = exynos_sysmmu_probe, - .driver = { +static const struct of_device_id sysmmu_of_match[] __initconst = { + { .compatible = "samsung,exynos-sysmmu", }, + { }, +}; + +static struct platform_driver exynos_sysmmu_driver __refdata = { + .probe = exynos_sysmmu_probe, + .driver = { .owner = THIS_MODULE, .name = "exynos-sysmmu", + .of_match_table = sysmmu_of_match, } }; @@ -711,21 +700,32 @@ static inline void pgtable_flush(void *vastart, void *vaend) static int exynos_iommu_domain_init(struct iommu_domain *domain) { struct exynos_iommu_domain *priv; + int i; priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; - priv->pgtable = (unsigned long *)__get_free_pages( - GFP_KERNEL | __GFP_ZERO, 2); + priv->pgtable = (sysmmu_pte_t *)__get_free_pages(GFP_KERNEL, 2); if (!priv->pgtable) goto err_pgtable; - priv->lv2entcnt = (short *)__get_free_pages( - GFP_KERNEL | __GFP_ZERO, 1); + priv->lv2entcnt = (short *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1); if (!priv->lv2entcnt) goto err_counter; + /* w/a of System MMU v3.3 to prevent caching 1MiB mapping */ + for (i = 0; i < NUM_LV1ENTRIES; i += 8) { + priv->pgtable[i + 0] = ZERO_LV2LINK; + priv->pgtable[i + 1] = ZERO_LV2LINK; + priv->pgtable[i + 2] = ZERO_LV2LINK; + priv->pgtable[i + 3] = ZERO_LV2LINK; + priv->pgtable[i + 4] = ZERO_LV2LINK; + priv->pgtable[i + 5] = ZERO_LV2LINK; + priv->pgtable[i + 6] = ZERO_LV2LINK; + priv->pgtable[i + 7] = ZERO_LV2LINK; + } + pgtable_flush(priv->pgtable, priv->pgtable + NUM_LV1ENTRIES); spin_lock_init(&priv->lock); @@ -749,7 +749,7 @@ err_pgtable: static void exynos_iommu_domain_destroy(struct iommu_domain *domain) { struct exynos_iommu_domain *priv = domain->priv; - struct sysmmu_drvdata *data; + struct exynos_iommu_owner *owner; unsigned long flags; int i; @@ -757,16 +757,20 @@ static void exynos_iommu_domain_destroy(struct iommu_domain *domain) spin_lock_irqsave(&priv->lock, flags); - list_for_each_entry(data, &priv->clients, node) { - while (!exynos_sysmmu_disable(data->dev)) + list_for_each_entry(owner, &priv->clients, client) { + while (!exynos_sysmmu_disable(owner->dev)) ; /* until System MMU is actually disabled */ } + while (!list_empty(&priv->clients)) + list_del_init(priv->clients.next); + spin_unlock_irqrestore(&priv->lock, flags); for (i = 0; i < NUM_LV1ENTRIES; i++) if (lv1ent_page(priv->pgtable + i)) - kfree(__va(lv2table_base(priv->pgtable + i))); + kmem_cache_free(lv2table_kmem_cache, + phys_to_virt(lv2table_base(priv->pgtable + i))); free_pages((unsigned long)priv->pgtable, 2); free_pages((unsigned long)priv->lv2entcnt, 1); @@ -777,114 +781,134 @@ static void exynos_iommu_domain_destroy(struct iommu_domain *domain) static int exynos_iommu_attach_device(struct iommu_domain *domain, struct device *dev) { - struct sysmmu_drvdata *data = dev_get_drvdata(dev->archdata.iommu); + struct exynos_iommu_owner *owner = dev->archdata.iommu; struct exynos_iommu_domain *priv = domain->priv; + phys_addr_t pagetable = virt_to_phys(priv->pgtable); unsigned long flags; int ret; - ret = pm_runtime_get_sync(data->sysmmu); - if (ret < 0) - return ret; - - ret = 0; - spin_lock_irqsave(&priv->lock, flags); - ret = __exynos_sysmmu_enable(data, __pa(priv->pgtable), domain); - + ret = __exynos_sysmmu_enable(dev, pagetable, domain); if (ret == 0) { - /* 'data->node' must not be appeared in priv->clients */ - BUG_ON(!list_empty(&data->node)); - data->dev = dev; - list_add_tail(&data->node, &priv->clients); + list_add_tail(&owner->client, &priv->clients); + owner->domain = domain; } spin_unlock_irqrestore(&priv->lock, flags); if (ret < 0) { - dev_err(dev, "%s: Failed to attach IOMMU with pgtable %#lx\n", - __func__, __pa(priv->pgtable)); - pm_runtime_put(data->sysmmu); - } else if (ret > 0) { - dev_dbg(dev, "%s: IOMMU with pgtable 0x%lx already attached\n", - __func__, __pa(priv->pgtable)); - } else { - dev_dbg(dev, "%s: Attached new IOMMU with pgtable 0x%lx\n", - __func__, __pa(priv->pgtable)); + dev_err(dev, "%s: Failed to attach IOMMU with pgtable %pa\n", + __func__, &pagetable); + return ret; } + dev_dbg(dev, "%s: Attached IOMMU with pgtable %pa %s\n", + __func__, &pagetable, (ret == 0) ? "" : ", again"); + return ret; } static void exynos_iommu_detach_device(struct iommu_domain *domain, struct device *dev) { - struct sysmmu_drvdata *data = dev_get_drvdata(dev->archdata.iommu); + struct exynos_iommu_owner *owner; struct exynos_iommu_domain *priv = domain->priv; - struct list_head *pos; + phys_addr_t pagetable = virt_to_phys(priv->pgtable); unsigned long flags; - bool found = false; spin_lock_irqsave(&priv->lock, flags); - list_for_each(pos, &priv->clients) { - if (list_entry(pos, struct sysmmu_drvdata, node) == data) { - found = true; + list_for_each_entry(owner, &priv->clients, client) { + if (owner == dev->archdata.iommu) { + if (exynos_sysmmu_disable(dev)) { + list_del_init(&owner->client); + owner->domain = NULL; + } break; } } - if (!found) - goto finish; - - if (__exynos_sysmmu_disable(data)) { - dev_dbg(dev, "%s: Detached IOMMU with pgtable %#lx\n", - __func__, __pa(priv->pgtable)); - list_del_init(&data->node); - - } else { - dev_dbg(dev, "%s: Detaching IOMMU with pgtable %#lx delayed", - __func__, __pa(priv->pgtable)); - } - -finish: spin_unlock_irqrestore(&priv->lock, flags); - if (found) - pm_runtime_put(data->sysmmu); + if (owner == dev->archdata.iommu) + dev_dbg(dev, "%s: Detached IOMMU with pgtable %pa\n", + __func__, &pagetable); + else + dev_err(dev, "%s: No IOMMU is attached\n", __func__); } -static unsigned long *alloc_lv2entry(unsigned long *sent, unsigned long iova, - short *pgcounter) +static sysmmu_pte_t *alloc_lv2entry(struct exynos_iommu_domain *priv, + sysmmu_pte_t *sent, sysmmu_iova_t iova, short *pgcounter) { + if (lv1ent_section(sent)) { + WARN(1, "Trying mapping on %#08x mapped with 1MiB page", iova); + return ERR_PTR(-EADDRINUSE); + } + if (lv1ent_fault(sent)) { - unsigned long *pent; + sysmmu_pte_t *pent; + bool need_flush_flpd_cache = lv1ent_zero(sent); - pent = kzalloc(LV2TABLE_SIZE, GFP_ATOMIC); - BUG_ON((unsigned long)pent & (LV2TABLE_SIZE - 1)); + pent = kmem_cache_zalloc(lv2table_kmem_cache, GFP_ATOMIC); + BUG_ON((unsigned int)pent & (LV2TABLE_SIZE - 1)); if (!pent) - return NULL; + return ERR_PTR(-ENOMEM); - *sent = mk_lv1ent_page(__pa(pent)); + *sent = mk_lv1ent_page(virt_to_phys(pent)); *pgcounter = NUM_LV2ENTRIES; pgtable_flush(pent, pent + NUM_LV2ENTRIES); pgtable_flush(sent, sent + 1); + + /* + * If pretched SLPD is a fault SLPD in zero_l2_table, FLPD cache + * may caches the address of zero_l2_table. This function + * replaces the zero_l2_table with new L2 page table to write + * valid mappings. + * Accessing the valid area may cause page fault since FLPD + * cache may still caches zero_l2_table for the valid area + * instead of new L2 page table that have the mapping + * information of the valid area + * Thus any replacement of zero_l2_table with other valid L2 + * page table must involve FLPD cache invalidation for System + * MMU v3.3. + * FLPD cache invalidation is performed with TLB invalidation + * by VPN without blocking. It is safe to invalidate TLB without + * blocking because the target address of TLB invalidation is + * not currently mapped. + */ + if (need_flush_flpd_cache) { + struct exynos_iommu_owner *owner; + + spin_lock(&priv->lock); + list_for_each_entry(owner, &priv->clients, client) + sysmmu_tlb_invalidate_flpdcache( + owner->dev, iova); + spin_unlock(&priv->lock); + } } return page_entry(sent, iova); } -static int lv1set_section(unsigned long *sent, phys_addr_t paddr, short *pgcnt) +static int lv1set_section(struct exynos_iommu_domain *priv, + sysmmu_pte_t *sent, sysmmu_iova_t iova, + phys_addr_t paddr, short *pgcnt) { - if (lv1ent_section(sent)) + if (lv1ent_section(sent)) { + WARN(1, "Trying mapping on 1MiB@%#08x that is mapped", + iova); return -EADDRINUSE; + } if (lv1ent_page(sent)) { - if (*pgcnt != NUM_LV2ENTRIES) + if (*pgcnt != NUM_LV2ENTRIES) { + WARN(1, "Trying mapping on 1MiB@%#08x that is mapped", + iova); return -EADDRINUSE; + } - kfree(page_entry(sent, 0)); - + kmem_cache_free(lv2table_kmem_cache, page_entry(sent, 0)); *pgcnt = 0; } @@ -892,14 +916,26 @@ static int lv1set_section(unsigned long *sent, phys_addr_t paddr, short *pgcnt) pgtable_flush(sent, sent + 1); + spin_lock(&priv->lock); + if (lv1ent_page_zero(sent)) { + struct exynos_iommu_owner *owner; + /* + * Flushing FLPD cache in System MMU v3.3 that may cache a FLPD + * entry by speculative prefetch of SLPD which has no mapping. + */ + list_for_each_entry(owner, &priv->clients, client) + sysmmu_tlb_invalidate_flpdcache(owner->dev, iova); + } + spin_unlock(&priv->lock); + return 0; } -static int lv2set_page(unsigned long *pent, phys_addr_t paddr, size_t size, +static int lv2set_page(sysmmu_pte_t *pent, phys_addr_t paddr, size_t size, short *pgcnt) { if (size == SPAGE_SIZE) { - if (!lv2ent_fault(pent)) + if (WARN_ON(!lv2ent_fault(pent))) return -EADDRINUSE; *pent = mk_lv2ent_spage(paddr); @@ -907,9 +943,11 @@ static int lv2set_page(unsigned long *pent, phys_addr_t paddr, size_t size, *pgcnt -= 1; } else { /* size == LPAGE_SIZE */ int i; + for (i = 0; i < SPAGES_PER_LPAGE; i++, pent++) { - if (!lv2ent_fault(pent)) { - memset(pent, 0, sizeof(*pent) * i); + if (WARN_ON(!lv2ent_fault(pent))) { + if (i > 0) + memset(pent - i, 0, sizeof(*pent) * i); return -EADDRINUSE; } @@ -922,11 +960,38 @@ static int lv2set_page(unsigned long *pent, phys_addr_t paddr, size_t size, return 0; } -static int exynos_iommu_map(struct iommu_domain *domain, unsigned long iova, +/* + * *CAUTION* to the I/O virtual memory managers that support exynos-iommu: + * + * System MMU v3.x have an advanced logic to improve address translation + * performance with caching more page table entries by a page table walk. + * However, the logic has a bug that caching fault page table entries and System + * MMU reports page fault if the cached fault entry is hit even though the fault + * entry is updated to a valid entry after the entry is cached. + * To prevent caching fault page table entries which may be updated to valid + * entries later, the virtual memory manager should care about the w/a about the + * problem. The followings describe w/a. + * + * Any two consecutive I/O virtual address regions must have a hole of 128KiB + * in maximum to prevent misbehavior of System MMU 3.x. (w/a of h/w bug) + * + * Precisely, any start address of I/O virtual region must be aligned by + * the following sizes for System MMU v3.1 and v3.2. + * System MMU v3.1: 128KiB + * System MMU v3.2: 256KiB + * + * Because System MMU v3.3 caches page table entries more aggressively, it needs + * more w/a. + * - Any two consecutive I/O virtual regions must be have a hole of larger size + * than or equal size to 128KiB. + * - Start address of an I/O virtual region must be aligned by 128KiB. + */ +static int exynos_iommu_map(struct iommu_domain *domain, unsigned long l_iova, phys_addr_t paddr, size_t size, int prot) { struct exynos_iommu_domain *priv = domain->priv; - unsigned long *entry; + sysmmu_pte_t *entry; + sysmmu_iova_t iova = (sysmmu_iova_t)l_iova; unsigned long flags; int ret = -ENOMEM; @@ -937,38 +1002,52 @@ static int exynos_iommu_map(struct iommu_domain *domain, unsigned long iova, entry = section_entry(priv->pgtable, iova); if (size == SECT_SIZE) { - ret = lv1set_section(entry, paddr, + ret = lv1set_section(priv, entry, iova, paddr, &priv->lv2entcnt[lv1ent_offset(iova)]); } else { - unsigned long *pent; + sysmmu_pte_t *pent; - pent = alloc_lv2entry(entry, iova, + pent = alloc_lv2entry(priv, entry, iova, &priv->lv2entcnt[lv1ent_offset(iova)]); - if (!pent) - ret = -ENOMEM; + if (IS_ERR(pent)) + ret = PTR_ERR(pent); else ret = lv2set_page(pent, paddr, size, &priv->lv2entcnt[lv1ent_offset(iova)]); } - if (ret) { - pr_debug("%s: Failed to map iova 0x%lx/0x%x bytes\n", - __func__, iova, size); - } + if (ret) + pr_err("%s: Failed(%d) to map %#zx bytes @ %#x\n", + __func__, ret, size, iova); spin_unlock_irqrestore(&priv->pgtablelock, flags); return ret; } +static void exynos_iommu_tlb_invalidate_entry(struct exynos_iommu_domain *priv, + sysmmu_iova_t iova, size_t size) +{ + struct exynos_iommu_owner *owner; + unsigned long flags; + + spin_lock_irqsave(&priv->lock, flags); + + list_for_each_entry(owner, &priv->clients, client) + sysmmu_tlb_invalidate_entry(owner->dev, iova, size); + + spin_unlock_irqrestore(&priv->lock, flags); +} + static size_t exynos_iommu_unmap(struct iommu_domain *domain, - unsigned long iova, size_t size) + unsigned long l_iova, size_t size) { struct exynos_iommu_domain *priv = domain->priv; - struct sysmmu_drvdata *data; + sysmmu_iova_t iova = (sysmmu_iova_t)l_iova; + sysmmu_pte_t *ent; + size_t err_pgsize; unsigned long flags; - unsigned long *ent; BUG_ON(priv->pgtable == NULL); @@ -977,9 +1056,12 @@ static size_t exynos_iommu_unmap(struct iommu_domain *domain, ent = section_entry(priv->pgtable, iova); if (lv1ent_section(ent)) { - BUG_ON(size < SECT_SIZE); + if (WARN_ON(size < SECT_SIZE)) { + err_pgsize = SECT_SIZE; + goto err; + } - *ent = 0; + *ent = ZERO_LV2LINK; /* w/a for h/w bug in Sysmem MMU v3.3 */ pgtable_flush(ent, ent + 1); size = SECT_SIZE; goto done; @@ -1003,34 +1085,42 @@ static size_t exynos_iommu_unmap(struct iommu_domain *domain, if (lv2ent_small(ent)) { *ent = 0; size = SPAGE_SIZE; + pgtable_flush(ent, ent + 1); priv->lv2entcnt[lv1ent_offset(iova)] += 1; goto done; } /* lv1ent_large(ent) == true here */ - BUG_ON(size < LPAGE_SIZE); + if (WARN_ON(size < LPAGE_SIZE)) { + err_pgsize = LPAGE_SIZE; + goto err; + } memset(ent, 0, sizeof(*ent) * SPAGES_PER_LPAGE); + pgtable_flush(ent, ent + SPAGES_PER_LPAGE); size = LPAGE_SIZE; priv->lv2entcnt[lv1ent_offset(iova)] += SPAGES_PER_LPAGE; done: spin_unlock_irqrestore(&priv->pgtablelock, flags); - spin_lock_irqsave(&priv->lock, flags); - list_for_each_entry(data, &priv->clients, node) - sysmmu_tlb_invalidate_entry(data->dev, iova); - spin_unlock_irqrestore(&priv->lock, flags); - + exynos_iommu_tlb_invalidate_entry(priv, iova, size); return size; +err: + spin_unlock_irqrestore(&priv->pgtablelock, flags); + + pr_err("%s: Failed: size(%#zx) @ %#x is smaller than page size %#zx\n", + __func__, size, iova, err_pgsize); + + return 0; } static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *domain, - unsigned long iova) + dma_addr_t iova) { struct exynos_iommu_domain *priv = domain->priv; - unsigned long *entry; + sysmmu_pte_t *entry; unsigned long flags; phys_addr_t phys = 0; @@ -1054,14 +1144,42 @@ static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *domain, return phys; } +static int exynos_iommu_add_device(struct device *dev) +{ + struct iommu_group *group; + int ret; + + group = iommu_group_get(dev); + + if (!group) { + group = iommu_group_alloc(); + if (IS_ERR(group)) { + dev_err(dev, "Failed to allocate IOMMU group\n"); + return PTR_ERR(group); + } + } + + ret = iommu_group_add_device(group, dev); + iommu_group_put(group); + + return ret; +} + +static void exynos_iommu_remove_device(struct device *dev) +{ + iommu_group_remove_device(dev); +} + static struct iommu_ops exynos_iommu_ops = { - .domain_init = &exynos_iommu_domain_init, - .domain_destroy = &exynos_iommu_domain_destroy, - .attach_dev = &exynos_iommu_attach_device, - .detach_dev = &exynos_iommu_detach_device, - .map = &exynos_iommu_map, - .unmap = &exynos_iommu_unmap, - .iova_to_phys = &exynos_iommu_iova_to_phys, + .domain_init = exynos_iommu_domain_init, + .domain_destroy = exynos_iommu_domain_destroy, + .attach_dev = exynos_iommu_attach_device, + .detach_dev = exynos_iommu_detach_device, + .map = exynos_iommu_map, + .unmap = exynos_iommu_unmap, + .iova_to_phys = exynos_iommu_iova_to_phys, + .add_device = exynos_iommu_add_device, + .remove_device = exynos_iommu_remove_device, .pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE, }; @@ -1069,11 +1187,41 @@ static int __init exynos_iommu_init(void) { int ret; + lv2table_kmem_cache = kmem_cache_create("exynos-iommu-lv2table", + LV2TABLE_SIZE, LV2TABLE_SIZE, 0, NULL); + if (!lv2table_kmem_cache) { + pr_err("%s: Failed to create kmem cache\n", __func__); + return -ENOMEM; + } + ret = platform_driver_register(&exynos_sysmmu_driver); + if (ret) { + pr_err("%s: Failed to register driver\n", __func__); + goto err_reg_driver; + } - if (ret == 0) - bus_set_iommu(&platform_bus_type, &exynos_iommu_ops); + zero_lv2_table = kmem_cache_zalloc(lv2table_kmem_cache, GFP_KERNEL); + if (zero_lv2_table == NULL) { + pr_err("%s: Failed to allocate zero level2 page table\n", + __func__); + ret = -ENOMEM; + goto err_zero_lv2; + } + ret = bus_set_iommu(&platform_bus_type, &exynos_iommu_ops); + if (ret) { + pr_err("%s: Failed to register exynos-iommu driver.\n", + __func__); + goto err_set_iommu; + } + + return 0; +err_set_iommu: + kmem_cache_free(lv2table_kmem_cache, zero_lv2_table); +err_zero_lv2: + platform_driver_unregister(&exynos_sysmmu_driver); +err_reg_driver: + kmem_cache_destroy(lv2table_kmem_cache); return ret; } subsys_initcall(exynos_iommu_init); diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c new file mode 100644 index 00000000000..bb446d742a2 --- /dev/null +++ b/drivers/iommu/fsl_pamu.c @@ -0,0 +1,1308 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright (C) 2013 Freescale Semiconductor, Inc. + * + */ + +#define pr_fmt(fmt) "fsl-pamu: %s: " fmt, __func__ + +#include <linux/init.h> +#include <linux/iommu.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/of_platform.h> +#include <linux/bootmem.h> +#include <linux/genalloc.h> +#include <asm/io.h> +#include <asm/bitops.h> +#include <asm/fsl_guts.h> + +#include "fsl_pamu.h" + +/* define indexes for each operation mapping scenario */ +#define OMI_QMAN 0x00 +#define OMI_FMAN 0x01 +#define OMI_QMAN_PRIV 0x02 +#define OMI_CAAM 0x03 + +#define make64(high, low) (((u64)(high) << 32) | (low)) + +struct pamu_isr_data { + void __iomem *pamu_reg_base; /* Base address of PAMU regs*/ + unsigned int count; /* The number of PAMUs */ +}; + +static struct paace *ppaact; +static struct paace *spaact; +static struct ome *omt; + +/* + * Table for matching compatible strings, for device tree + * guts node, for QorIQ SOCs. + * "fsl,qoriq-device-config-2.0" corresponds to T4 & B4 + * SOCs. For the older SOCs "fsl,qoriq-device-config-1.0" + * string would be used. +*/ +static const struct of_device_id guts_device_ids[] = { + { .compatible = "fsl,qoriq-device-config-1.0", }, + { .compatible = "fsl,qoriq-device-config-2.0", }, + {} +}; + + +/* + * Table for matching compatible strings, for device tree + * L3 cache controller node. + * "fsl,t4240-l3-cache-controller" corresponds to T4, + * "fsl,b4860-l3-cache-controller" corresponds to B4 & + * "fsl,p4080-l3-cache-controller" corresponds to other, + * SOCs. +*/ +static const struct of_device_id l3_device_ids[] = { + { .compatible = "fsl,t4240-l3-cache-controller", }, + { .compatible = "fsl,b4860-l3-cache-controller", }, + { .compatible = "fsl,p4080-l3-cache-controller", }, + {} +}; + +/* maximum subwindows permitted per liodn */ +static u32 max_subwindow_count; + +/* Pool for fspi allocation */ +struct gen_pool *spaace_pool; + +/** + * pamu_get_max_subwin_cnt() - Return the maximum supported + * subwindow count per liodn. + * + */ +u32 pamu_get_max_subwin_cnt() +{ + return max_subwindow_count; +} + +/** + * pamu_get_ppaace() - Return the primary PACCE + * @liodn: liodn PAACT index for desired PAACE + * + * Returns the ppace pointer upon success else return + * null. + */ +static struct paace *pamu_get_ppaace(int liodn) +{ + if (!ppaact || liodn >= PAACE_NUMBER_ENTRIES) { + pr_debug("PPAACT doesn't exist\n"); + return NULL; + } + + return &ppaact[liodn]; +} + +/** + * pamu_enable_liodn() - Set valid bit of PACCE + * @liodn: liodn PAACT index for desired PAACE + * + * Returns 0 upon success else error code < 0 returned + */ +int pamu_enable_liodn(int liodn) +{ + struct paace *ppaace; + + ppaace = pamu_get_ppaace(liodn); + if (!ppaace) { + pr_debug("Invalid primary paace entry\n"); + return -ENOENT; + } + + if (!get_bf(ppaace->addr_bitfields, PPAACE_AF_WSE)) { + pr_debug("liodn %d not configured\n", liodn); + return -EINVAL; + } + + /* Ensure that all other stores to the ppaace complete first */ + mb(); + + set_bf(ppaace->addr_bitfields, PAACE_AF_V, PAACE_V_VALID); + mb(); + + return 0; +} + +/** + * pamu_disable_liodn() - Clears valid bit of PACCE + * @liodn: liodn PAACT index for desired PAACE + * + * Returns 0 upon success else error code < 0 returned + */ +int pamu_disable_liodn(int liodn) +{ + struct paace *ppaace; + + ppaace = pamu_get_ppaace(liodn); + if (!ppaace) { + pr_debug("Invalid primary paace entry\n"); + return -ENOENT; + } + + set_bf(ppaace->addr_bitfields, PAACE_AF_V, PAACE_V_INVALID); + mb(); + + return 0; +} + +/* Derive the window size encoding for a particular PAACE entry */ +static unsigned int map_addrspace_size_to_wse(phys_addr_t addrspace_size) +{ + /* Bug if not a power of 2 */ + BUG_ON((addrspace_size & (addrspace_size - 1))); + + /* window size is 2^(WSE+1) bytes */ + return fls64(addrspace_size) - 2; +} + +/* Derive the PAACE window count encoding for the subwindow count */ +static unsigned int map_subwindow_cnt_to_wce(u32 subwindow_cnt) +{ + /* window count is 2^(WCE+1) bytes */ + return __ffs(subwindow_cnt) - 1; +} + +/* + * Set the PAACE type as primary and set the coherency required domain + * attribute + */ +static void pamu_init_ppaace(struct paace *ppaace) +{ + set_bf(ppaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_PRIMARY); + + set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR, + PAACE_M_COHERENCE_REQ); +} + +/* + * Set the PAACE type as secondary and set the coherency required domain + * attribute. + */ +static void pamu_init_spaace(struct paace *spaace) +{ + set_bf(spaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_SECONDARY); + set_bf(spaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR, + PAACE_M_COHERENCE_REQ); +} + +/* + * Return the spaace (corresponding to the secondary window index) + * for a particular ppaace. + */ +static struct paace *pamu_get_spaace(struct paace *paace, u32 wnum) +{ + u32 subwin_cnt; + struct paace *spaace = NULL; + + subwin_cnt = 1UL << (get_bf(paace->impl_attr, PAACE_IA_WCE) + 1); + + if (wnum < subwin_cnt) + spaace = &spaact[paace->fspi + wnum]; + else + pr_debug("secondary paace out of bounds\n"); + + return spaace; +} + +/** + * pamu_get_fspi_and_allocate() - Allocates fspi index and reserves subwindows + * required for primary PAACE in the secondary + * PAACE table. + * @subwin_cnt: Number of subwindows to be reserved. + * + * A PPAACE entry may have a number of associated subwindows. A subwindow + * corresponds to a SPAACE entry in the SPAACT table. Each PAACE entry stores + * the index (fspi) of the first SPAACE entry in the SPAACT table. This + * function returns the index of the first SPAACE entry. The remaining + * SPAACE entries are reserved contiguously from that index. + * + * Returns a valid fspi index in the range of 0 - SPAACE_NUMBER_ENTRIES on success. + * If no SPAACE entry is available or the allocator can not reserve the required + * number of contiguous entries function returns ULONG_MAX indicating a failure. + * +*/ +static unsigned long pamu_get_fspi_and_allocate(u32 subwin_cnt) +{ + unsigned long spaace_addr; + + spaace_addr = gen_pool_alloc(spaace_pool, subwin_cnt * sizeof(struct paace)); + if (!spaace_addr) + return ULONG_MAX; + + return (spaace_addr - (unsigned long)spaact) / (sizeof(struct paace)); +} + +/* Release the subwindows reserved for a particular LIODN */ +void pamu_free_subwins(int liodn) +{ + struct paace *ppaace; + u32 subwin_cnt, size; + + ppaace = pamu_get_ppaace(liodn); + if (!ppaace) { + pr_debug("Invalid liodn entry\n"); + return; + } + + if (get_bf(ppaace->addr_bitfields, PPAACE_AF_MW)) { + subwin_cnt = 1UL << (get_bf(ppaace->impl_attr, PAACE_IA_WCE) + 1); + size = (subwin_cnt - 1) * sizeof(struct paace); + gen_pool_free(spaace_pool, (unsigned long)&spaact[ppaace->fspi], size); + set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0); + } +} + +/* + * Function used for updating stash destination for the coressponding + * LIODN. + */ +int pamu_update_paace_stash(int liodn, u32 subwin, u32 value) +{ + struct paace *paace; + + paace = pamu_get_ppaace(liodn); + if (!paace) { + pr_debug("Invalid liodn entry\n"); + return -ENOENT; + } + if (subwin) { + paace = pamu_get_spaace(paace, subwin - 1); + if (!paace) { + return -ENOENT; + } + } + set_bf(paace->impl_attr, PAACE_IA_CID, value); + + mb(); + + return 0; +} + +/* Disable a subwindow corresponding to the LIODN */ +int pamu_disable_spaace(int liodn, u32 subwin) +{ + struct paace *paace; + + paace = pamu_get_ppaace(liodn); + if (!paace) { + pr_debug("Invalid liodn entry\n"); + return -ENOENT; + } + if (subwin) { + paace = pamu_get_spaace(paace, subwin - 1); + if (!paace) { + return -ENOENT; + } + set_bf(paace->addr_bitfields, PAACE_AF_V, + PAACE_V_INVALID); + } else { + set_bf(paace->addr_bitfields, PAACE_AF_AP, + PAACE_AP_PERMS_DENIED); + } + + mb(); + + return 0; +} + + +/** + * pamu_config_paace() - Sets up PPAACE entry for specified liodn + * + * @liodn: Logical IO device number + * @win_addr: starting address of DSA window + * @win-size: size of DSA window + * @omi: Operation mapping index -- if ~omi == 0 then omi not defined + * @rpn: real (true physical) page number + * @stashid: cache stash id for associated cpu -- if ~stashid == 0 then + * stashid not defined + * @snoopid: snoop id for hardware coherency -- if ~snoopid == 0 then + * snoopid not defined + * @subwin_cnt: number of sub-windows + * @prot: window permissions + * + * Returns 0 upon success else error code < 0 returned + */ +int pamu_config_ppaace(int liodn, phys_addr_t win_addr, phys_addr_t win_size, + u32 omi, unsigned long rpn, u32 snoopid, u32 stashid, + u32 subwin_cnt, int prot) +{ + struct paace *ppaace; + unsigned long fspi; + + if ((win_size & (win_size - 1)) || win_size < PAMU_PAGE_SIZE) { + pr_debug("window size too small or not a power of two %llx\n", win_size); + return -EINVAL; + } + + if (win_addr & (win_size - 1)) { + pr_debug("window address is not aligned with window size\n"); + return -EINVAL; + } + + ppaace = pamu_get_ppaace(liodn); + if (!ppaace) { + return -ENOENT; + } + + /* window size is 2^(WSE+1) bytes */ + set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE, + map_addrspace_size_to_wse(win_size)); + + pamu_init_ppaace(ppaace); + + ppaace->wbah = win_addr >> (PAMU_PAGE_SHIFT + 20); + set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL, + (win_addr >> PAMU_PAGE_SHIFT)); + + /* set up operation mapping if it's configured */ + if (omi < OME_NUMBER_ENTRIES) { + set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED); + ppaace->op_encode.index_ot.omi = omi; + } else if (~omi != 0) { + pr_debug("bad operation mapping index: %d\n", omi); + return -EINVAL; + } + + /* configure stash id */ + if (~stashid != 0) + set_bf(ppaace->impl_attr, PAACE_IA_CID, stashid); + + /* configure snoop id */ + if (~snoopid != 0) + ppaace->domain_attr.to_host.snpid = snoopid; + + if (subwin_cnt) { + /* The first entry is in the primary PAACE instead */ + fspi = pamu_get_fspi_and_allocate(subwin_cnt - 1); + if (fspi == ULONG_MAX) { + pr_debug("spaace indexes exhausted\n"); + return -EINVAL; + } + + /* window count is 2^(WCE+1) bytes */ + set_bf(ppaace->impl_attr, PAACE_IA_WCE, + map_subwindow_cnt_to_wce(subwin_cnt)); + set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0x1); + ppaace->fspi = fspi; + } else { + set_bf(ppaace->impl_attr, PAACE_IA_ATM, PAACE_ATM_WINDOW_XLATE); + ppaace->twbah = rpn >> 20; + set_bf(ppaace->win_bitfields, PAACE_WIN_TWBAL, rpn); + set_bf(ppaace->addr_bitfields, PAACE_AF_AP, prot); + set_bf(ppaace->impl_attr, PAACE_IA_WCE, 0); + set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0); + } + mb(); + + return 0; +} + +/** + * pamu_config_spaace() - Sets up SPAACE entry for specified subwindow + * + * @liodn: Logical IO device number + * @subwin_cnt: number of sub-windows associated with dma-window + * @subwin: subwindow index + * @subwin_size: size of subwindow + * @omi: Operation mapping index + * @rpn: real (true physical) page number + * @snoopid: snoop id for hardware coherency -- if ~snoopid == 0 then + * snoopid not defined + * @stashid: cache stash id for associated cpu + * @enable: enable/disable subwindow after reconfiguration + * @prot: sub window permissions + * + * Returns 0 upon success else error code < 0 returned + */ +int pamu_config_spaace(int liodn, u32 subwin_cnt, u32 subwin, + phys_addr_t subwin_size, u32 omi, unsigned long rpn, + u32 snoopid, u32 stashid, int enable, int prot) +{ + struct paace *paace; + + + /* setup sub-windows */ + if (!subwin_cnt) { + pr_debug("Invalid subwindow count\n"); + return -EINVAL; + } + + paace = pamu_get_ppaace(liodn); + if (subwin > 0 && subwin < subwin_cnt && paace) { + paace = pamu_get_spaace(paace, subwin - 1); + + if (paace && !(paace->addr_bitfields & PAACE_V_VALID)) { + pamu_init_spaace(paace); + set_bf(paace->addr_bitfields, SPAACE_AF_LIODN, liodn); + } + } + + if (!paace) { + pr_debug("Invalid liodn entry\n"); + return -ENOENT; + } + + if ((subwin_size & (subwin_size - 1)) || subwin_size < PAMU_PAGE_SIZE) { + pr_debug("subwindow size out of range, or not a power of 2\n"); + return -EINVAL; + } + + if (rpn == ULONG_MAX) { + pr_debug("real page number out of range\n"); + return -EINVAL; + } + + /* window size is 2^(WSE+1) bytes */ + set_bf(paace->win_bitfields, PAACE_WIN_SWSE, + map_addrspace_size_to_wse(subwin_size)); + + set_bf(paace->impl_attr, PAACE_IA_ATM, PAACE_ATM_WINDOW_XLATE); + paace->twbah = rpn >> 20; + set_bf(paace->win_bitfields, PAACE_WIN_TWBAL, rpn); + set_bf(paace->addr_bitfields, PAACE_AF_AP, prot); + + /* configure snoop id */ + if (~snoopid != 0) + paace->domain_attr.to_host.snpid = snoopid; + + /* set up operation mapping if it's configured */ + if (omi < OME_NUMBER_ENTRIES) { + set_bf(paace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED); + paace->op_encode.index_ot.omi = omi; + } else if (~omi != 0) { + pr_debug("bad operation mapping index: %d\n", omi); + return -EINVAL; + } + + if (~stashid != 0) + set_bf(paace->impl_attr, PAACE_IA_CID, stashid); + + smp_wmb(); + + if (enable) + set_bf(paace->addr_bitfields, PAACE_AF_V, PAACE_V_VALID); + + mb(); + + return 0; +} + +/** +* get_ome_index() - Returns the index in the operation mapping table +* for device. +* @*omi_index: pointer for storing the index value +* +*/ +void get_ome_index(u32 *omi_index, struct device *dev) +{ + if (of_device_is_compatible(dev->of_node, "fsl,qman-portal")) + *omi_index = OMI_QMAN; + if (of_device_is_compatible(dev->of_node, "fsl,qman")) + *omi_index = OMI_QMAN_PRIV; +} + +/** + * get_stash_id - Returns stash destination id corresponding to a + * cache type and vcpu. + * @stash_dest_hint: L1, L2 or L3 + * @vcpu: vpcu target for a particular cache type. + * + * Returs stash on success or ~(u32)0 on failure. + * + */ +u32 get_stash_id(u32 stash_dest_hint, u32 vcpu) +{ + const u32 *prop; + struct device_node *node; + u32 cache_level; + int len, found = 0; + int i; + + /* Fastpath, exit early if L3/CPC cache is target for stashing */ + if (stash_dest_hint == PAMU_ATTR_CACHE_L3) { + node = of_find_matching_node(NULL, l3_device_ids); + if (node) { + prop = of_get_property(node, "cache-stash-id", 0); + if (!prop) { + pr_debug("missing cache-stash-id at %s\n", node->full_name); + of_node_put(node); + return ~(u32)0; + } + of_node_put(node); + return be32_to_cpup(prop); + } + return ~(u32)0; + } + + for_each_node_by_type(node, "cpu") { + prop = of_get_property(node, "reg", &len); + for (i = 0; i < len / sizeof(u32); i++) { + if (be32_to_cpup(&prop[i]) == vcpu) { + found = 1; + goto found_cpu_node; + } + } + } +found_cpu_node: + + /* find the hwnode that represents the cache */ + for (cache_level = PAMU_ATTR_CACHE_L1; (cache_level < PAMU_ATTR_CACHE_L3) && found; cache_level++) { + if (stash_dest_hint == cache_level) { + prop = of_get_property(node, "cache-stash-id", 0); + if (!prop) { + pr_debug("missing cache-stash-id at %s\n", node->full_name); + of_node_put(node); + return ~(u32)0; + } + of_node_put(node); + return be32_to_cpup(prop); + } + + prop = of_get_property(node, "next-level-cache", 0); + if (!prop) { + pr_debug("can't find next-level-cache at %s\n", + node->full_name); + of_node_put(node); + return ~(u32)0; /* can't traverse any further */ + } + of_node_put(node); + + /* advance to next node in cache hierarchy */ + node = of_find_node_by_phandle(*prop); + if (!node) { + pr_debug("Invalid node for cache hierarchy\n"); + return ~(u32)0; + } + } + + pr_debug("stash dest not found for %d on vcpu %d\n", + stash_dest_hint, vcpu); + return ~(u32)0; +} + +/* Identify if the PAACT table entry belongs to QMAN, BMAN or QMAN Portal */ +#define QMAN_PAACE 1 +#define QMAN_PORTAL_PAACE 2 +#define BMAN_PAACE 3 + +/** + * Setup operation mapping and stash destinations for QMAN and QMAN portal. + * Memory accesses to QMAN and BMAN private memory need not be coherent, so + * clear the PAACE entry coherency attribute for them. + */ +static void setup_qbman_paace(struct paace *ppaace, int paace_type) +{ + switch (paace_type) { + case QMAN_PAACE: + set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED); + ppaace->op_encode.index_ot.omi = OMI_QMAN_PRIV; + /* setup QMAN Private data stashing for the L3 cache */ + set_bf(ppaace->impl_attr, PAACE_IA_CID, get_stash_id(PAMU_ATTR_CACHE_L3, 0)); + set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR, + 0); + break; + case QMAN_PORTAL_PAACE: + set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED); + ppaace->op_encode.index_ot.omi = OMI_QMAN; + /*Set DQRR and Frame stashing for the L3 cache */ + set_bf(ppaace->impl_attr, PAACE_IA_CID, get_stash_id(PAMU_ATTR_CACHE_L3, 0)); + break; + case BMAN_PAACE: + set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR, + 0); + break; + } +} + +/** + * Setup the operation mapping table for various devices. This is a static + * table where each table index corresponds to a particular device. PAMU uses + * this table to translate device transaction to appropriate corenet + * transaction. + */ +static void __init setup_omt(struct ome *omt) +{ + struct ome *ome; + + /* Configure OMI_QMAN */ + ome = &omt[OMI_QMAN]; + + ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READ; + ome->moe[IOE_EREAD0_IDX] = EOE_VALID | EOE_RSA; + ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE; + ome->moe[IOE_EWRITE0_IDX] = EOE_VALID | EOE_WWSAO; + + ome->moe[IOE_DIRECT0_IDX] = EOE_VALID | EOE_LDEC; + ome->moe[IOE_DIRECT1_IDX] = EOE_VALID | EOE_LDECPE; + + /* Configure OMI_FMAN */ + ome = &omt[OMI_FMAN]; + ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READI; + ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE; + + /* Configure OMI_QMAN private */ + ome = &omt[OMI_QMAN_PRIV]; + ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READ; + ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE; + ome->moe[IOE_EREAD0_IDX] = EOE_VALID | EOE_RSA; + ome->moe[IOE_EWRITE0_IDX] = EOE_VALID | EOE_WWSA; + + /* Configure OMI_CAAM */ + ome = &omt[OMI_CAAM]; + ome->moe[IOE_READ_IDX] = EOE_VALID | EOE_READI; + ome->moe[IOE_WRITE_IDX] = EOE_VALID | EOE_WRITE; +} + +/* + * Get the maximum number of PAACT table entries + * and subwindows supported by PAMU + */ +static void get_pamu_cap_values(unsigned long pamu_reg_base) +{ + u32 pc_val; + + pc_val = in_be32((u32 *)(pamu_reg_base + PAMU_PC3)); + /* Maximum number of subwindows per liodn */ + max_subwindow_count = 1 << (1 + PAMU_PC3_MWCE(pc_val)); +} + +/* Setup PAMU registers pointing to PAACT, SPAACT and OMT */ +int setup_one_pamu(unsigned long pamu_reg_base, unsigned long pamu_reg_size, + phys_addr_t ppaact_phys, phys_addr_t spaact_phys, + phys_addr_t omt_phys) +{ + u32 *pc; + struct pamu_mmap_regs *pamu_regs; + + pc = (u32 *) (pamu_reg_base + PAMU_PC); + pamu_regs = (struct pamu_mmap_regs *) + (pamu_reg_base + PAMU_MMAP_REGS_BASE); + + /* set up pointers to corenet control blocks */ + + out_be32(&pamu_regs->ppbah, upper_32_bits(ppaact_phys)); + out_be32(&pamu_regs->ppbal, lower_32_bits(ppaact_phys)); + ppaact_phys = ppaact_phys + PAACT_SIZE; + out_be32(&pamu_regs->pplah, upper_32_bits(ppaact_phys)); + out_be32(&pamu_regs->pplal, lower_32_bits(ppaact_phys)); + + out_be32(&pamu_regs->spbah, upper_32_bits(spaact_phys)); + out_be32(&pamu_regs->spbal, lower_32_bits(spaact_phys)); + spaact_phys = spaact_phys + SPAACT_SIZE; + out_be32(&pamu_regs->splah, upper_32_bits(spaact_phys)); + out_be32(&pamu_regs->splal, lower_32_bits(spaact_phys)); + + out_be32(&pamu_regs->obah, upper_32_bits(omt_phys)); + out_be32(&pamu_regs->obal, lower_32_bits(omt_phys)); + omt_phys = omt_phys + OMT_SIZE; + out_be32(&pamu_regs->olah, upper_32_bits(omt_phys)); + out_be32(&pamu_regs->olal, lower_32_bits(omt_phys)); + + /* + * set PAMU enable bit, + * allow ppaact & omt to be cached + * & enable PAMU access violation interrupts. + */ + + out_be32((u32 *)(pamu_reg_base + PAMU_PICS), + PAMU_ACCESS_VIOLATION_ENABLE); + out_be32(pc, PAMU_PC_PE | PAMU_PC_OCE | PAMU_PC_SPCC | PAMU_PC_PPCC); + return 0; +} + +/* Enable all device LIODNS */ +static void __init setup_liodns(void) +{ + int i, len; + struct paace *ppaace; + struct device_node *node = NULL; + const u32 *prop; + + for_each_node_with_property(node, "fsl,liodn") { + prop = of_get_property(node, "fsl,liodn", &len); + for (i = 0; i < len / sizeof(u32); i++) { + int liodn; + + liodn = be32_to_cpup(&prop[i]); + if (liodn >= PAACE_NUMBER_ENTRIES) { + pr_debug("Invalid LIODN value %d\n", liodn); + continue; + } + ppaace = pamu_get_ppaace(liodn); + pamu_init_ppaace(ppaace); + /* window size is 2^(WSE+1) bytes */ + set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE, 35); + ppaace->wbah = 0; + set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL, 0); + set_bf(ppaace->impl_attr, PAACE_IA_ATM, + PAACE_ATM_NO_XLATE); + set_bf(ppaace->addr_bitfields, PAACE_AF_AP, + PAACE_AP_PERMS_ALL); + if (of_device_is_compatible(node, "fsl,qman-portal")) + setup_qbman_paace(ppaace, QMAN_PORTAL_PAACE); + if (of_device_is_compatible(node, "fsl,qman")) + setup_qbman_paace(ppaace, QMAN_PAACE); + if (of_device_is_compatible(node, "fsl,bman")) + setup_qbman_paace(ppaace, BMAN_PAACE); + mb(); + pamu_enable_liodn(liodn); + } + } +} + +irqreturn_t pamu_av_isr(int irq, void *arg) +{ + struct pamu_isr_data *data = arg; + phys_addr_t phys; + unsigned int i, j, ret; + + pr_emerg("access violation interrupt\n"); + + for (i = 0; i < data->count; i++) { + void __iomem *p = data->pamu_reg_base + i * PAMU_OFFSET; + u32 pics = in_be32(p + PAMU_PICS); + + if (pics & PAMU_ACCESS_VIOLATION_STAT) { + u32 avs1 = in_be32(p + PAMU_AVS1); + struct paace *paace; + + pr_emerg("POES1=%08x\n", in_be32(p + PAMU_POES1)); + pr_emerg("POES2=%08x\n", in_be32(p + PAMU_POES2)); + pr_emerg("AVS1=%08x\n", avs1); + pr_emerg("AVS2=%08x\n", in_be32(p + PAMU_AVS2)); + pr_emerg("AVA=%016llx\n", make64(in_be32(p + PAMU_AVAH), + in_be32(p + PAMU_AVAL))); + pr_emerg("UDAD=%08x\n", in_be32(p + PAMU_UDAD)); + pr_emerg("POEA=%016llx\n", make64(in_be32(p + PAMU_POEAH), + in_be32(p + PAMU_POEAL))); + + phys = make64(in_be32(p + PAMU_POEAH), + in_be32(p + PAMU_POEAL)); + + /* Assume that POEA points to a PAACE */ + if (phys) { + u32 *paace = phys_to_virt(phys); + + /* Only the first four words are relevant */ + for (j = 0; j < 4; j++) + pr_emerg("PAACE[%u]=%08x\n", j, in_be32(paace + j)); + } + + /* clear access violation condition */ + out_be32((p + PAMU_AVS1), avs1 & PAMU_AV_MASK); + paace = pamu_get_ppaace(avs1 >> PAMU_AVS1_LIODN_SHIFT); + BUG_ON(!paace); + /* check if we got a violation for a disabled LIODN */ + if (!get_bf(paace->addr_bitfields, PAACE_AF_V)) { + /* + * As per hardware erratum A-003638, access + * violation can be reported for a disabled + * LIODN. If we hit that condition, disable + * access violation reporting. + */ + pics &= ~PAMU_ACCESS_VIOLATION_ENABLE; + } else { + /* Disable the LIODN */ + ret = pamu_disable_liodn(avs1 >> PAMU_AVS1_LIODN_SHIFT); + BUG_ON(ret); + pr_emerg("Disabling liodn %x\n", avs1 >> PAMU_AVS1_LIODN_SHIFT); + } + out_be32((p + PAMU_PICS), pics); + } + } + + + return IRQ_HANDLED; +} + +#define LAWAR_EN 0x80000000 +#define LAWAR_TARGET_MASK 0x0FF00000 +#define LAWAR_TARGET_SHIFT 20 +#define LAWAR_SIZE_MASK 0x0000003F +#define LAWAR_CSDID_MASK 0x000FF000 +#define LAWAR_CSDID_SHIFT 12 + +#define LAW_SIZE_4K 0xb + +struct ccsr_law { + u32 lawbarh; /* LAWn base address high */ + u32 lawbarl; /* LAWn base address low */ + u32 lawar; /* LAWn attributes */ + u32 reserved; +}; + +/* + * Create a coherence subdomain for a given memory block. + */ +static int __init create_csd(phys_addr_t phys, size_t size, u32 csd_port_id) +{ + struct device_node *np; + const __be32 *iprop; + void __iomem *lac = NULL; /* Local Access Control registers */ + struct ccsr_law __iomem *law; + void __iomem *ccm = NULL; + u32 __iomem *csdids; + unsigned int i, num_laws, num_csds; + u32 law_target = 0; + u32 csd_id = 0; + int ret = 0; + + np = of_find_compatible_node(NULL, NULL, "fsl,corenet-law"); + if (!np) + return -ENODEV; + + iprop = of_get_property(np, "fsl,num-laws", NULL); + if (!iprop) { + ret = -ENODEV; + goto error; + } + + num_laws = be32_to_cpup(iprop); + if (!num_laws) { + ret = -ENODEV; + goto error; + } + + lac = of_iomap(np, 0); + if (!lac) { + ret = -ENODEV; + goto error; + } + + /* LAW registers are at offset 0xC00 */ + law = lac + 0xC00; + + of_node_put(np); + + np = of_find_compatible_node(NULL, NULL, "fsl,corenet-cf"); + if (!np) { + ret = -ENODEV; + goto error; + } + + iprop = of_get_property(np, "fsl,ccf-num-csdids", NULL); + if (!iprop) { + ret = -ENODEV; + goto error; + } + + num_csds = be32_to_cpup(iprop); + if (!num_csds) { + ret = -ENODEV; + goto error; + } + + ccm = of_iomap(np, 0); + if (!ccm) { + ret = -ENOMEM; + goto error; + } + + /* The undocumented CSDID registers are at offset 0x600 */ + csdids = ccm + 0x600; + + of_node_put(np); + np = NULL; + + /* Find an unused coherence subdomain ID */ + for (csd_id = 0; csd_id < num_csds; csd_id++) { + if (!csdids[csd_id]) + break; + } + + /* Store the Port ID in the (undocumented) proper CIDMRxx register */ + csdids[csd_id] = csd_port_id; + + /* Find the DDR LAW that maps to our buffer. */ + for (i = 0; i < num_laws; i++) { + if (law[i].lawar & LAWAR_EN) { + phys_addr_t law_start, law_end; + + law_start = make64(law[i].lawbarh, law[i].lawbarl); + law_end = law_start + + (2ULL << (law[i].lawar & LAWAR_SIZE_MASK)); + + if (law_start <= phys && phys < law_end) { + law_target = law[i].lawar & LAWAR_TARGET_MASK; + break; + } + } + } + + if (i == 0 || i == num_laws) { + /* This should never happen*/ + ret = -ENOENT; + goto error; + } + + /* Find a free LAW entry */ + while (law[--i].lawar & LAWAR_EN) { + if (i == 0) { + /* No higher priority LAW slots available */ + ret = -ENOENT; + goto error; + } + } + + law[i].lawbarh = upper_32_bits(phys); + law[i].lawbarl = lower_32_bits(phys); + wmb(); + law[i].lawar = LAWAR_EN | law_target | (csd_id << LAWAR_CSDID_SHIFT) | + (LAW_SIZE_4K + get_order(size)); + wmb(); + +error: + if (ccm) + iounmap(ccm); + + if (lac) + iounmap(lac); + + if (np) + of_node_put(np); + + return ret; +} + +/* + * Table of SVRs and the corresponding PORT_ID values. Port ID corresponds to a + * bit map of snoopers for a given range of memory mapped by a LAW. + * + * All future CoreNet-enabled SOCs will have this erratum(A-004510) fixed, so this + * table should never need to be updated. SVRs are guaranteed to be unique, so + * there is no worry that a future SOC will inadvertently have one of these + * values. + */ +static const struct { + u32 svr; + u32 port_id; +} port_id_map[] = { + {0x82100010, 0xFF000000}, /* P2040 1.0 */ + {0x82100011, 0xFF000000}, /* P2040 1.1 */ + {0x82100110, 0xFF000000}, /* P2041 1.0 */ + {0x82100111, 0xFF000000}, /* P2041 1.1 */ + {0x82110310, 0xFF000000}, /* P3041 1.0 */ + {0x82110311, 0xFF000000}, /* P3041 1.1 */ + {0x82010020, 0xFFF80000}, /* P4040 2.0 */ + {0x82000020, 0xFFF80000}, /* P4080 2.0 */ + {0x82210010, 0xFC000000}, /* P5010 1.0 */ + {0x82210020, 0xFC000000}, /* P5010 2.0 */ + {0x82200010, 0xFC000000}, /* P5020 1.0 */ + {0x82050010, 0xFF800000}, /* P5021 1.0 */ + {0x82040010, 0xFF800000}, /* P5040 1.0 */ +}; + +#define SVR_SECURITY 0x80000 /* The Security (E) bit */ + +static int __init fsl_pamu_probe(struct platform_device *pdev) +{ + void __iomem *pamu_regs = NULL; + struct ccsr_guts __iomem *guts_regs = NULL; + u32 pamubypenr, pamu_counter; + unsigned long pamu_reg_off; + unsigned long pamu_reg_base; + struct pamu_isr_data *data = NULL; + struct device_node *guts_node; + u64 size; + struct page *p; + int ret = 0; + int irq; + phys_addr_t ppaact_phys; + phys_addr_t spaact_phys; + phys_addr_t omt_phys; + size_t mem_size = 0; + unsigned int order = 0; + u32 csd_port_id = 0; + unsigned i; + /* + * enumerate all PAMUs and allocate and setup PAMU tables + * for each of them, + * NOTE : All PAMUs share the same LIODN tables. + */ + + pamu_regs = of_iomap(pdev->dev.of_node, 0); + if (!pamu_regs) { + dev_err(&pdev->dev, "ioremap of PAMU node failed\n"); + return -ENOMEM; + } + of_get_address(pdev->dev.of_node, 0, &size, NULL); + + irq = irq_of_parse_and_map(pdev->dev.of_node, 0); + if (irq == NO_IRQ) { + dev_warn(&pdev->dev, "no interrupts listed in PAMU node\n"); + goto error; + } + + data = kzalloc(sizeof(struct pamu_isr_data), GFP_KERNEL); + if (!data) { + dev_err(&pdev->dev, "PAMU isr data memory allocation failed\n"); + ret = -ENOMEM; + goto error; + } + data->pamu_reg_base = pamu_regs; + data->count = size / PAMU_OFFSET; + + /* The ISR needs access to the regs, so we won't iounmap them */ + ret = request_irq(irq, pamu_av_isr, 0, "pamu", data); + if (ret < 0) { + dev_err(&pdev->dev, "error %i installing ISR for irq %i\n", + ret, irq); + goto error; + } + + guts_node = of_find_matching_node(NULL, guts_device_ids); + if (!guts_node) { + dev_err(&pdev->dev, "could not find GUTS node %s\n", + pdev->dev.of_node->full_name); + ret = -ENODEV; + goto error; + } + + guts_regs = of_iomap(guts_node, 0); + of_node_put(guts_node); + if (!guts_regs) { + dev_err(&pdev->dev, "ioremap of GUTS node failed\n"); + ret = -ENODEV; + goto error; + } + + /* read in the PAMU capability registers */ + get_pamu_cap_values((unsigned long)pamu_regs); + /* + * To simplify the allocation of a coherency domain, we allocate the + * PAACT and the OMT in the same memory buffer. Unfortunately, this + * wastes more memory compared to allocating the buffers separately. + */ + /* Determine how much memory we need */ + mem_size = (PAGE_SIZE << get_order(PAACT_SIZE)) + + (PAGE_SIZE << get_order(SPAACT_SIZE)) + + (PAGE_SIZE << get_order(OMT_SIZE)); + order = get_order(mem_size); + + p = alloc_pages(GFP_KERNEL | __GFP_ZERO, order); + if (!p) { + dev_err(&pdev->dev, "unable to allocate PAACT/SPAACT/OMT block\n"); + ret = -ENOMEM; + goto error; + } + + ppaact = page_address(p); + ppaact_phys = page_to_phys(p); + + /* Make sure the memory is naturally aligned */ + if (ppaact_phys & ((PAGE_SIZE << order) - 1)) { + dev_err(&pdev->dev, "PAACT/OMT block is unaligned\n"); + ret = -ENOMEM; + goto error; + } + + spaact = (void *)ppaact + (PAGE_SIZE << get_order(PAACT_SIZE)); + omt = (void *)spaact + (PAGE_SIZE << get_order(SPAACT_SIZE)); + + dev_dbg(&pdev->dev, "ppaact virt=%p phys=0x%llx\n", ppaact, + (unsigned long long) ppaact_phys); + + /* Check to see if we need to implement the work-around on this SOC */ + + /* Determine the Port ID for our coherence subdomain */ + for (i = 0; i < ARRAY_SIZE(port_id_map); i++) { + if (port_id_map[i].svr == (mfspr(SPRN_SVR) & ~SVR_SECURITY)) { + csd_port_id = port_id_map[i].port_id; + dev_dbg(&pdev->dev, "found matching SVR %08x\n", + port_id_map[i].svr); + break; + } + } + + if (csd_port_id) { + dev_dbg(&pdev->dev, "creating coherency subdomain at address " + "0x%llx, size %zu, port id 0x%08x", ppaact_phys, + mem_size, csd_port_id); + + ret = create_csd(ppaact_phys, mem_size, csd_port_id); + if (ret) { + dev_err(&pdev->dev, "could not create coherence " + "subdomain\n"); + return ret; + } + } + + spaact_phys = virt_to_phys(spaact); + omt_phys = virt_to_phys(omt); + + spaace_pool = gen_pool_create(ilog2(sizeof(struct paace)), -1); + if (!spaace_pool) { + ret = -ENOMEM; + dev_err(&pdev->dev, "PAMU : failed to allocate spaace gen pool\n"); + goto error; + } + + ret = gen_pool_add(spaace_pool, (unsigned long)spaact, SPAACT_SIZE, -1); + if (ret) + goto error_genpool; + + pamubypenr = in_be32(&guts_regs->pamubypenr); + + for (pamu_reg_off = 0, pamu_counter = 0x80000000; pamu_reg_off < size; + pamu_reg_off += PAMU_OFFSET, pamu_counter >>= 1) { + + pamu_reg_base = (unsigned long) pamu_regs + pamu_reg_off; + setup_one_pamu(pamu_reg_base, pamu_reg_off, ppaact_phys, + spaact_phys, omt_phys); + /* Disable PAMU bypass for this PAMU */ + pamubypenr &= ~pamu_counter; + } + + setup_omt(omt); + + /* Enable all relevant PAMU(s) */ + out_be32(&guts_regs->pamubypenr, pamubypenr); + + iounmap(guts_regs); + + /* Enable DMA for the LIODNs in the device tree*/ + + setup_liodns(); + + return 0; + +error_genpool: + gen_pool_destroy(spaace_pool); + +error: + if (irq != NO_IRQ) + free_irq(irq, data); + + if (data) { + memset(data, 0, sizeof(struct pamu_isr_data)); + kfree(data); + } + + if (pamu_regs) + iounmap(pamu_regs); + + if (guts_regs) + iounmap(guts_regs); + + if (ppaact) + free_pages((unsigned long)ppaact, order); + + ppaact = NULL; + + return ret; +} + +static const struct of_device_id fsl_of_pamu_ids[] = { + { + .compatible = "fsl,p4080-pamu", + }, + { + .compatible = "fsl,pamu", + }, + {}, +}; + +static struct platform_driver fsl_of_pamu_driver = { + .driver = { + .name = "fsl-of-pamu", + .owner = THIS_MODULE, + }, + .probe = fsl_pamu_probe, +}; + +static __init int fsl_pamu_init(void) +{ + struct platform_device *pdev = NULL; + struct device_node *np; + int ret; + + /* + * The normal OF process calls the probe function at some + * indeterminate later time, after most drivers have loaded. This is + * too late for us, because PAMU clients (like the Qman driver) + * depend on PAMU being initialized early. + * + * So instead, we "manually" call our probe function by creating the + * platform devices ourselves. + */ + + /* + * We assume that there is only one PAMU node in the device tree. A + * single PAMU node represents all of the PAMU devices in the SOC + * already. Everything else already makes that assumption, and the + * binding for the PAMU nodes doesn't allow for any parent-child + * relationships anyway. In other words, support for more than one + * PAMU node would require significant changes to a lot of code. + */ + + np = of_find_compatible_node(NULL, NULL, "fsl,pamu"); + if (!np) { + pr_err("could not find a PAMU node\n"); + return -ENODEV; + } + + ret = platform_driver_register(&fsl_of_pamu_driver); + if (ret) { + pr_err("could not register driver (err=%i)\n", ret); + goto error_driver_register; + } + + pdev = platform_device_alloc("fsl-of-pamu", 0); + if (!pdev) { + pr_err("could not allocate device %s\n", + np->full_name); + ret = -ENOMEM; + goto error_device_alloc; + } + pdev->dev.of_node = of_node_get(np); + + ret = pamu_domain_init(); + if (ret) + goto error_device_add; + + ret = platform_device_add(pdev); + if (ret) { + pr_err("could not add device %s (err=%i)\n", + np->full_name, ret); + goto error_device_add; + } + + return 0; + +error_device_add: + of_node_put(pdev->dev.of_node); + pdev->dev.of_node = NULL; + + platform_device_put(pdev); + +error_device_alloc: + platform_driver_unregister(&fsl_of_pamu_driver); + +error_driver_register: + of_node_put(np); + + return ret; +} +arch_initcall(fsl_pamu_init); diff --git a/drivers/iommu/fsl_pamu.h b/drivers/iommu/fsl_pamu.h new file mode 100644 index 00000000000..8fc1a125b16 --- /dev/null +++ b/drivers/iommu/fsl_pamu.h @@ -0,0 +1,410 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright (C) 2013 Freescale Semiconductor, Inc. + * + */ + +#ifndef __FSL_PAMU_H +#define __FSL_PAMU_H + +#include <asm/fsl_pamu_stash.h> + +/* Bit Field macros + * v = bit field variable; m = mask, m##_SHIFT = shift, x = value to load + */ +#define set_bf(v, m, x) (v = ((v) & ~(m)) | (((x) << (m##_SHIFT)) & (m))) +#define get_bf(v, m) (((v) & (m)) >> (m##_SHIFT)) + +/* PAMU CCSR space */ +#define PAMU_PGC 0x00000000 /* Allows all peripheral accesses */ +#define PAMU_PE 0x40000000 /* enable PAMU */ + +/* PAMU_OFFSET to the next pamu space in ccsr */ +#define PAMU_OFFSET 0x1000 + +#define PAMU_MMAP_REGS_BASE 0 + +struct pamu_mmap_regs { + u32 ppbah; + u32 ppbal; + u32 pplah; + u32 pplal; + u32 spbah; + u32 spbal; + u32 splah; + u32 splal; + u32 obah; + u32 obal; + u32 olah; + u32 olal; +}; + +/* PAMU Error Registers */ +#define PAMU_POES1 0x0040 +#define PAMU_POES2 0x0044 +#define PAMU_POEAH 0x0048 +#define PAMU_POEAL 0x004C +#define PAMU_AVS1 0x0050 +#define PAMU_AVS1_AV 0x1 +#define PAMU_AVS1_OTV 0x6 +#define PAMU_AVS1_APV 0x78 +#define PAMU_AVS1_WAV 0x380 +#define PAMU_AVS1_LAV 0x1c00 +#define PAMU_AVS1_GCV 0x2000 +#define PAMU_AVS1_PDV 0x4000 +#define PAMU_AV_MASK (PAMU_AVS1_AV | PAMU_AVS1_OTV | PAMU_AVS1_APV | PAMU_AVS1_WAV \ + | PAMU_AVS1_LAV | PAMU_AVS1_GCV | PAMU_AVS1_PDV) +#define PAMU_AVS1_LIODN_SHIFT 16 +#define PAMU_LAV_LIODN_NOT_IN_PPAACT 0x400 + +#define PAMU_AVS2 0x0054 +#define PAMU_AVAH 0x0058 +#define PAMU_AVAL 0x005C +#define PAMU_EECTL 0x0060 +#define PAMU_EEDIS 0x0064 +#define PAMU_EEINTEN 0x0068 +#define PAMU_EEDET 0x006C +#define PAMU_EEATTR 0x0070 +#define PAMU_EEAHI 0x0074 +#define PAMU_EEALO 0x0078 +#define PAMU_EEDHI 0X007C +#define PAMU_EEDLO 0x0080 +#define PAMU_EECC 0x0084 +#define PAMU_UDAD 0x0090 + +/* PAMU Revision Registers */ +#define PAMU_PR1 0x0BF8 +#define PAMU_PR2 0x0BFC + +/* PAMU version mask */ +#define PAMU_PR1_MASK 0xffff + +/* PAMU Capabilities Registers */ +#define PAMU_PC1 0x0C00 +#define PAMU_PC2 0x0C04 +#define PAMU_PC3 0x0C08 +#define PAMU_PC4 0x0C0C + +/* PAMU Control Register */ +#define PAMU_PC 0x0C10 + +/* PAMU control defs */ +#define PAMU_CONTROL 0x0C10 +#define PAMU_PC_PGC 0x80000000 /* PAMU gate closed bit */ +#define PAMU_PC_PE 0x40000000 /* PAMU enable bit */ +#define PAMU_PC_SPCC 0x00000010 /* sPAACE cache enable */ +#define PAMU_PC_PPCC 0x00000001 /* pPAACE cache enable */ +#define PAMU_PC_OCE 0x00001000 /* OMT cache enable */ + +#define PAMU_PFA1 0x0C14 +#define PAMU_PFA2 0x0C18 + +#define PAMU_PC2_MLIODN(X) ((X) >> 16) +#define PAMU_PC3_MWCE(X) (((X) >> 21) & 0xf) + +/* PAMU Interrupt control and Status Register */ +#define PAMU_PICS 0x0C1C +#define PAMU_ACCESS_VIOLATION_STAT 0x8 +#define PAMU_ACCESS_VIOLATION_ENABLE 0x4 + +/* PAMU Debug Registers */ +#define PAMU_PD1 0x0F00 +#define PAMU_PD2 0x0F04 +#define PAMU_PD3 0x0F08 +#define PAMU_PD4 0x0F0C + +#define PAACE_AP_PERMS_DENIED 0x0 +#define PAACE_AP_PERMS_QUERY 0x1 +#define PAACE_AP_PERMS_UPDATE 0x2 +#define PAACE_AP_PERMS_ALL 0x3 + +#define PAACE_DD_TO_HOST 0x0 +#define PAACE_DD_TO_IO 0x1 +#define PAACE_PT_PRIMARY 0x0 +#define PAACE_PT_SECONDARY 0x1 +#define PAACE_V_INVALID 0x0 +#define PAACE_V_VALID 0x1 +#define PAACE_MW_SUBWINDOWS 0x1 + +#define PAACE_WSE_4K 0xB +#define PAACE_WSE_8K 0xC +#define PAACE_WSE_16K 0xD +#define PAACE_WSE_32K 0xE +#define PAACE_WSE_64K 0xF +#define PAACE_WSE_128K 0x10 +#define PAACE_WSE_256K 0x11 +#define PAACE_WSE_512K 0x12 +#define PAACE_WSE_1M 0x13 +#define PAACE_WSE_2M 0x14 +#define PAACE_WSE_4M 0x15 +#define PAACE_WSE_8M 0x16 +#define PAACE_WSE_16M 0x17 +#define PAACE_WSE_32M 0x18 +#define PAACE_WSE_64M 0x19 +#define PAACE_WSE_128M 0x1A +#define PAACE_WSE_256M 0x1B +#define PAACE_WSE_512M 0x1C +#define PAACE_WSE_1G 0x1D +#define PAACE_WSE_2G 0x1E +#define PAACE_WSE_4G 0x1F + +#define PAACE_DID_PCI_EXPRESS_1 0x00 +#define PAACE_DID_PCI_EXPRESS_2 0x01 +#define PAACE_DID_PCI_EXPRESS_3 0x02 +#define PAACE_DID_PCI_EXPRESS_4 0x03 +#define PAACE_DID_LOCAL_BUS 0x04 +#define PAACE_DID_SRIO 0x0C +#define PAACE_DID_MEM_1 0x10 +#define PAACE_DID_MEM_2 0x11 +#define PAACE_DID_MEM_3 0x12 +#define PAACE_DID_MEM_4 0x13 +#define PAACE_DID_MEM_1_2 0x14 +#define PAACE_DID_MEM_3_4 0x15 +#define PAACE_DID_MEM_1_4 0x16 +#define PAACE_DID_BM_SW_PORTAL 0x18 +#define PAACE_DID_PAMU 0x1C +#define PAACE_DID_CAAM 0x21 +#define PAACE_DID_QM_SW_PORTAL 0x3C +#define PAACE_DID_CORE0_INST 0x80 +#define PAACE_DID_CORE0_DATA 0x81 +#define PAACE_DID_CORE1_INST 0x82 +#define PAACE_DID_CORE1_DATA 0x83 +#define PAACE_DID_CORE2_INST 0x84 +#define PAACE_DID_CORE2_DATA 0x85 +#define PAACE_DID_CORE3_INST 0x86 +#define PAACE_DID_CORE3_DATA 0x87 +#define PAACE_DID_CORE4_INST 0x88 +#define PAACE_DID_CORE4_DATA 0x89 +#define PAACE_DID_CORE5_INST 0x8A +#define PAACE_DID_CORE5_DATA 0x8B +#define PAACE_DID_CORE6_INST 0x8C +#define PAACE_DID_CORE6_DATA 0x8D +#define PAACE_DID_CORE7_INST 0x8E +#define PAACE_DID_CORE7_DATA 0x8F +#define PAACE_DID_BROADCAST 0xFF + +#define PAACE_ATM_NO_XLATE 0x00 +#define PAACE_ATM_WINDOW_XLATE 0x01 +#define PAACE_ATM_PAGE_XLATE 0x02 +#define PAACE_ATM_WIN_PG_XLATE \ + (PAACE_ATM_WINDOW_XLATE | PAACE_ATM_PAGE_XLATE) +#define PAACE_OTM_NO_XLATE 0x00 +#define PAACE_OTM_IMMEDIATE 0x01 +#define PAACE_OTM_INDEXED 0x02 +#define PAACE_OTM_RESERVED 0x03 + +#define PAACE_M_COHERENCE_REQ 0x01 + +#define PAACE_PID_0 0x0 +#define PAACE_PID_1 0x1 +#define PAACE_PID_2 0x2 +#define PAACE_PID_3 0x3 +#define PAACE_PID_4 0x4 +#define PAACE_PID_5 0x5 +#define PAACE_PID_6 0x6 +#define PAACE_PID_7 0x7 + +#define PAACE_TCEF_FORMAT0_8B 0x00 +#define PAACE_TCEF_FORMAT1_RSVD 0x01 +/* + * Hard coded value for the PAACT size to accomodate + * maximum LIODN value generated by u-boot. + */ +#define PAACE_NUMBER_ENTRIES 0x500 +/* Hard coded value for the SPAACT size */ +#define SPAACE_NUMBER_ENTRIES 0x800 + +#define OME_NUMBER_ENTRIES 16 + +/* PAACE Bit Field Defines */ +#define PPAACE_AF_WBAL 0xfffff000 +#define PPAACE_AF_WBAL_SHIFT 12 +#define PPAACE_AF_WSE 0x00000fc0 +#define PPAACE_AF_WSE_SHIFT 6 +#define PPAACE_AF_MW 0x00000020 +#define PPAACE_AF_MW_SHIFT 5 + +#define SPAACE_AF_LIODN 0xffff0000 +#define SPAACE_AF_LIODN_SHIFT 16 + +#define PAACE_AF_AP 0x00000018 +#define PAACE_AF_AP_SHIFT 3 +#define PAACE_AF_DD 0x00000004 +#define PAACE_AF_DD_SHIFT 2 +#define PAACE_AF_PT 0x00000002 +#define PAACE_AF_PT_SHIFT 1 +#define PAACE_AF_V 0x00000001 +#define PAACE_AF_V_SHIFT 0 + +#define PAACE_DA_HOST_CR 0x80 +#define PAACE_DA_HOST_CR_SHIFT 7 + +#define PAACE_IA_CID 0x00FF0000 +#define PAACE_IA_CID_SHIFT 16 +#define PAACE_IA_WCE 0x000000F0 +#define PAACE_IA_WCE_SHIFT 4 +#define PAACE_IA_ATM 0x0000000C +#define PAACE_IA_ATM_SHIFT 2 +#define PAACE_IA_OTM 0x00000003 +#define PAACE_IA_OTM_SHIFT 0 + +#define PAACE_WIN_TWBAL 0xfffff000 +#define PAACE_WIN_TWBAL_SHIFT 12 +#define PAACE_WIN_SWSE 0x00000fc0 +#define PAACE_WIN_SWSE_SHIFT 6 + +/* PAMU Data Structures */ +/* primary / secondary paact structure */ +struct paace { + /* PAACE Offset 0x00 */ + u32 wbah; /* only valid for Primary PAACE */ + u32 addr_bitfields; /* See P/S PAACE_AF_* */ + + /* PAACE Offset 0x08 */ + /* Interpretation of first 32 bits dependent on DD above */ + union { + struct { + /* Destination ID, see PAACE_DID_* defines */ + u8 did; + /* Partition ID */ + u8 pid; + /* Snoop ID */ + u8 snpid; + /* coherency_required : 1 reserved : 7 */ + u8 coherency_required; /* See PAACE_DA_* */ + } to_host; + struct { + /* Destination ID, see PAACE_DID_* defines */ + u8 did; + u8 reserved1; + u16 reserved2; + } to_io; + } domain_attr; + + /* Implementation attributes + window count + address & operation translation modes */ + u32 impl_attr; /* See PAACE_IA_* */ + + /* PAACE Offset 0x10 */ + /* Translated window base address */ + u32 twbah; + u32 win_bitfields; /* See PAACE_WIN_* */ + + /* PAACE Offset 0x18 */ + /* first secondary paace entry */ + u32 fspi; /* only valid for Primary PAACE */ + union { + struct { + u8 ioea; + u8 moea; + u8 ioeb; + u8 moeb; + } immed_ot; + struct { + u16 reserved; + u16 omi; + } index_ot; + } op_encode; + + /* PAACE Offsets 0x20-0x38 */ + u32 reserved[8]; /* not currently implemented */ +}; + +/* OME : Operation mapping entry + * MOE : Mapped Operation Encodings + * The operation mapping table is table containing operation mapping entries (OME). + * The index of a particular OME is programmed in the PAACE entry for translation + * in bound I/O operations corresponding to an LIODN. The OMT is used for translation + * specifically in case of the indexed translation mode. Each OME contains a 128 + * byte mapped operation encoding (MOE), where each byte represents an MOE. + */ +#define NUM_MOE 128 +struct ome { + u8 moe[NUM_MOE]; +} __attribute__((packed)); + +#define PAACT_SIZE (sizeof(struct paace) * PAACE_NUMBER_ENTRIES) +#define SPAACT_SIZE (sizeof(struct paace) * SPAACE_NUMBER_ENTRIES) +#define OMT_SIZE (sizeof(struct ome) * OME_NUMBER_ENTRIES) + +#define PAMU_PAGE_SHIFT 12 +#define PAMU_PAGE_SIZE 4096ULL + +#define IOE_READ 0x00 +#define IOE_READ_IDX 0x00 +#define IOE_WRITE 0x81 +#define IOE_WRITE_IDX 0x01 +#define IOE_EREAD0 0x82 /* Enhanced read type 0 */ +#define IOE_EREAD0_IDX 0x02 /* Enhanced read type 0 */ +#define IOE_EWRITE0 0x83 /* Enhanced write type 0 */ +#define IOE_EWRITE0_IDX 0x03 /* Enhanced write type 0 */ +#define IOE_DIRECT0 0x84 /* Directive type 0 */ +#define IOE_DIRECT0_IDX 0x04 /* Directive type 0 */ +#define IOE_EREAD1 0x85 /* Enhanced read type 1 */ +#define IOE_EREAD1_IDX 0x05 /* Enhanced read type 1 */ +#define IOE_EWRITE1 0x86 /* Enhanced write type 1 */ +#define IOE_EWRITE1_IDX 0x06 /* Enhanced write type 1 */ +#define IOE_DIRECT1 0x87 /* Directive type 1 */ +#define IOE_DIRECT1_IDX 0x07 /* Directive type 1 */ +#define IOE_RAC 0x8c /* Read with Atomic clear */ +#define IOE_RAC_IDX 0x0c /* Read with Atomic clear */ +#define IOE_RAS 0x8d /* Read with Atomic set */ +#define IOE_RAS_IDX 0x0d /* Read with Atomic set */ +#define IOE_RAD 0x8e /* Read with Atomic decrement */ +#define IOE_RAD_IDX 0x0e /* Read with Atomic decrement */ +#define IOE_RAI 0x8f /* Read with Atomic increment */ +#define IOE_RAI_IDX 0x0f /* Read with Atomic increment */ + +#define EOE_READ 0x00 +#define EOE_WRITE 0x01 +#define EOE_RAC 0x0c /* Read with Atomic clear */ +#define EOE_RAS 0x0d /* Read with Atomic set */ +#define EOE_RAD 0x0e /* Read with Atomic decrement */ +#define EOE_RAI 0x0f /* Read with Atomic increment */ +#define EOE_LDEC 0x10 /* Load external cache */ +#define EOE_LDECL 0x11 /* Load external cache with stash lock */ +#define EOE_LDECPE 0x12 /* Load external cache with preferred exclusive */ +#define EOE_LDECPEL 0x13 /* Load external cache with preferred exclusive and lock */ +#define EOE_LDECFE 0x14 /* Load external cache with forced exclusive */ +#define EOE_LDECFEL 0x15 /* Load external cache with forced exclusive and lock */ +#define EOE_RSA 0x16 /* Read with stash allocate */ +#define EOE_RSAU 0x17 /* Read with stash allocate and unlock */ +#define EOE_READI 0x18 /* Read with invalidate */ +#define EOE_RWNITC 0x19 /* Read with no intention to cache */ +#define EOE_WCI 0x1a /* Write cache inhibited */ +#define EOE_WWSA 0x1b /* Write with stash allocate */ +#define EOE_WWSAL 0x1c /* Write with stash allocate and lock */ +#define EOE_WWSAO 0x1d /* Write with stash allocate only */ +#define EOE_WWSAOL 0x1e /* Write with stash allocate only and lock */ +#define EOE_VALID 0x80 + +/* Function prototypes */ +int pamu_domain_init(void); +int pamu_enable_liodn(int liodn); +int pamu_disable_liodn(int liodn); +void pamu_free_subwins(int liodn); +int pamu_config_ppaace(int liodn, phys_addr_t win_addr, phys_addr_t win_size, + u32 omi, unsigned long rpn, u32 snoopid, uint32_t stashid, + u32 subwin_cnt, int prot); +int pamu_config_spaace(int liodn, u32 subwin_cnt, u32 subwin_addr, + phys_addr_t subwin_size, u32 omi, unsigned long rpn, + uint32_t snoopid, u32 stashid, int enable, int prot); + +u32 get_stash_id(u32 stash_dest_hint, u32 vcpu); +void get_ome_index(u32 *omi_index, struct device *dev); +int pamu_update_paace_stash(int liodn, u32 subwin, u32 value); +int pamu_disable_spaace(int liodn, u32 subwin); +u32 pamu_get_max_subwin_cnt(void); + +#endif /* __FSL_PAMU_H */ diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c new file mode 100644 index 00000000000..af47648301a --- /dev/null +++ b/drivers/iommu/fsl_pamu_domain.c @@ -0,0 +1,1170 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright (C) 2013 Freescale Semiconductor, Inc. + * Author: Varun Sethi <varun.sethi@freescale.com> + * + */ + +#define pr_fmt(fmt) "fsl-pamu-domain: %s: " fmt, __func__ + +#include <linux/init.h> +#include <linux/iommu.h> +#include <linux/notifier.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/of_platform.h> +#include <linux/bootmem.h> +#include <linux/err.h> +#include <asm/io.h> +#include <asm/bitops.h> + +#include <asm/pci-bridge.h> +#include <sysdev/fsl_pci.h> + +#include "fsl_pamu_domain.h" +#include "pci.h" + +/* + * Global spinlock that needs to be held while + * configuring PAMU. + */ +static DEFINE_SPINLOCK(iommu_lock); + +static struct kmem_cache *fsl_pamu_domain_cache; +static struct kmem_cache *iommu_devinfo_cache; +static DEFINE_SPINLOCK(device_domain_lock); + +static int __init iommu_init_mempool(void) +{ + + fsl_pamu_domain_cache = kmem_cache_create("fsl_pamu_domain", + sizeof(struct fsl_dma_domain), + 0, + SLAB_HWCACHE_ALIGN, + + NULL); + if (!fsl_pamu_domain_cache) { + pr_debug("Couldn't create fsl iommu_domain cache\n"); + return -ENOMEM; + } + + iommu_devinfo_cache = kmem_cache_create("iommu_devinfo", + sizeof(struct device_domain_info), + 0, + SLAB_HWCACHE_ALIGN, + NULL); + if (!iommu_devinfo_cache) { + pr_debug("Couldn't create devinfo cache\n"); + kmem_cache_destroy(fsl_pamu_domain_cache); + return -ENOMEM; + } + + return 0; +} + +static phys_addr_t get_phys_addr(struct fsl_dma_domain *dma_domain, dma_addr_t iova) +{ + u32 win_cnt = dma_domain->win_cnt; + struct dma_window *win_ptr = + &dma_domain->win_arr[0]; + struct iommu_domain_geometry *geom; + + geom = &dma_domain->iommu_domain->geometry; + + if (!win_cnt || !dma_domain->geom_size) { + pr_debug("Number of windows/geometry not configured for the domain\n"); + return 0; + } + + if (win_cnt > 1) { + u64 subwin_size; + dma_addr_t subwin_iova; + u32 wnd; + + subwin_size = dma_domain->geom_size >> ilog2(win_cnt); + subwin_iova = iova & ~(subwin_size - 1); + wnd = (subwin_iova - geom->aperture_start) >> ilog2(subwin_size); + win_ptr = &dma_domain->win_arr[wnd]; + } + + if (win_ptr->valid) + return (win_ptr->paddr + (iova & (win_ptr->size - 1))); + + return 0; +} + +static int map_subwins(int liodn, struct fsl_dma_domain *dma_domain) +{ + struct dma_window *sub_win_ptr = + &dma_domain->win_arr[0]; + int i, ret; + unsigned long rpn, flags; + + for (i = 0; i < dma_domain->win_cnt; i++) { + if (sub_win_ptr[i].valid) { + rpn = sub_win_ptr[i].paddr >> + PAMU_PAGE_SHIFT; + spin_lock_irqsave(&iommu_lock, flags); + ret = pamu_config_spaace(liodn, dma_domain->win_cnt, i, + sub_win_ptr[i].size, + ~(u32)0, + rpn, + dma_domain->snoop_id, + dma_domain->stash_id, + (i > 0) ? 1 : 0, + sub_win_ptr[i].prot); + spin_unlock_irqrestore(&iommu_lock, flags); + if (ret) { + pr_debug("PAMU SPAACE configuration failed for liodn %d\n", + liodn); + return ret; + } + } + } + + return ret; +} + +static int map_win(int liodn, struct fsl_dma_domain *dma_domain) +{ + int ret; + struct dma_window *wnd = &dma_domain->win_arr[0]; + phys_addr_t wnd_addr = dma_domain->iommu_domain->geometry.aperture_start; + unsigned long flags; + + spin_lock_irqsave(&iommu_lock, flags); + ret = pamu_config_ppaace(liodn, wnd_addr, + wnd->size, + ~(u32)0, + wnd->paddr >> PAMU_PAGE_SHIFT, + dma_domain->snoop_id, dma_domain->stash_id, + 0, wnd->prot); + spin_unlock_irqrestore(&iommu_lock, flags); + if (ret) + pr_debug("PAMU PAACE configuration failed for liodn %d\n", + liodn); + + return ret; +} + +/* Map the DMA window corresponding to the LIODN */ +static int map_liodn(int liodn, struct fsl_dma_domain *dma_domain) +{ + if (dma_domain->win_cnt > 1) + return map_subwins(liodn, dma_domain); + else + return map_win(liodn, dma_domain); + +} + +/* Update window/subwindow mapping for the LIODN */ +static int update_liodn(int liodn, struct fsl_dma_domain *dma_domain, u32 wnd_nr) +{ + int ret; + struct dma_window *wnd = &dma_domain->win_arr[wnd_nr]; + unsigned long flags; + + spin_lock_irqsave(&iommu_lock, flags); + if (dma_domain->win_cnt > 1) { + ret = pamu_config_spaace(liodn, dma_domain->win_cnt, wnd_nr, + wnd->size, + ~(u32)0, + wnd->paddr >> PAMU_PAGE_SHIFT, + dma_domain->snoop_id, + dma_domain->stash_id, + (wnd_nr > 0) ? 1 : 0, + wnd->prot); + if (ret) + pr_debug("Subwindow reconfiguration failed for liodn %d\n", liodn); + } else { + phys_addr_t wnd_addr; + + wnd_addr = dma_domain->iommu_domain->geometry.aperture_start; + + ret = pamu_config_ppaace(liodn, wnd_addr, + wnd->size, + ~(u32)0, + wnd->paddr >> PAMU_PAGE_SHIFT, + dma_domain->snoop_id, dma_domain->stash_id, + 0, wnd->prot); + if (ret) + pr_debug("Window reconfiguration failed for liodn %d\n", liodn); + } + + spin_unlock_irqrestore(&iommu_lock, flags); + + return ret; +} + +static int update_liodn_stash(int liodn, struct fsl_dma_domain *dma_domain, + u32 val) +{ + int ret = 0, i; + unsigned long flags; + + spin_lock_irqsave(&iommu_lock, flags); + if (!dma_domain->win_arr) { + pr_debug("Windows not configured, stash destination update failed for liodn %d\n", liodn); + spin_unlock_irqrestore(&iommu_lock, flags); + return -EINVAL; + } + + for (i = 0; i < dma_domain->win_cnt; i++) { + ret = pamu_update_paace_stash(liodn, i, val); + if (ret) { + pr_debug("Failed to update SPAACE %d field for liodn %d\n ", i, liodn); + spin_unlock_irqrestore(&iommu_lock, flags); + return ret; + } + } + + spin_unlock_irqrestore(&iommu_lock, flags); + + return ret; +} + +/* Set the geometry parameters for a LIODN */ +static int pamu_set_liodn(int liodn, struct device *dev, + struct fsl_dma_domain *dma_domain, + struct iommu_domain_geometry *geom_attr, + u32 win_cnt) +{ + phys_addr_t window_addr, window_size; + phys_addr_t subwin_size; + int ret = 0, i; + u32 omi_index = ~(u32)0; + unsigned long flags; + + /* + * Configure the omi_index at the geometry setup time. + * This is a static value which depends on the type of + * device and would not change thereafter. + */ + get_ome_index(&omi_index, dev); + + window_addr = geom_attr->aperture_start; + window_size = dma_domain->geom_size; + + spin_lock_irqsave(&iommu_lock, flags); + ret = pamu_disable_liodn(liodn); + if (!ret) + ret = pamu_config_ppaace(liodn, window_addr, window_size, omi_index, + 0, dma_domain->snoop_id, + dma_domain->stash_id, win_cnt, 0); + spin_unlock_irqrestore(&iommu_lock, flags); + if (ret) { + pr_debug("PAMU PAACE configuration failed for liodn %d, win_cnt =%d\n", liodn, win_cnt); + return ret; + } + + if (win_cnt > 1) { + subwin_size = window_size >> ilog2(win_cnt); + for (i = 0; i < win_cnt; i++) { + spin_lock_irqsave(&iommu_lock, flags); + ret = pamu_disable_spaace(liodn, i); + if (!ret) + ret = pamu_config_spaace(liodn, win_cnt, i, + subwin_size, omi_index, + 0, dma_domain->snoop_id, + dma_domain->stash_id, + 0, 0); + spin_unlock_irqrestore(&iommu_lock, flags); + if (ret) { + pr_debug("PAMU SPAACE configuration failed for liodn %d\n", liodn); + return ret; + } + } + } + + return ret; +} + +static int check_size(u64 size, dma_addr_t iova) +{ + /* + * Size must be a power of two and at least be equal + * to PAMU page size. + */ + if ((size & (size - 1)) || size < PAMU_PAGE_SIZE) { + pr_debug("%s: size too small or not a power of two\n", __func__); + return -EINVAL; + } + + /* iova must be page size aligned*/ + if (iova & (size - 1)) { + pr_debug("%s: address is not aligned with window size\n", __func__); + return -EINVAL; + } + + return 0; +} + +static struct fsl_dma_domain *iommu_alloc_dma_domain(void) +{ + struct fsl_dma_domain *domain; + + domain = kmem_cache_zalloc(fsl_pamu_domain_cache, GFP_KERNEL); + if (!domain) + return NULL; + + domain->stash_id = ~(u32)0; + domain->snoop_id = ~(u32)0; + domain->win_cnt = pamu_get_max_subwin_cnt(); + domain->geom_size = 0; + + INIT_LIST_HEAD(&domain->devices); + + spin_lock_init(&domain->domain_lock); + + return domain; +} + +static void remove_device_ref(struct device_domain_info *info, u32 win_cnt) +{ + unsigned long flags; + + list_del(&info->link); + spin_lock_irqsave(&iommu_lock, flags); + if (win_cnt > 1) + pamu_free_subwins(info->liodn); + pamu_disable_liodn(info->liodn); + spin_unlock_irqrestore(&iommu_lock, flags); + spin_lock_irqsave(&device_domain_lock, flags); + info->dev->archdata.iommu_domain = NULL; + kmem_cache_free(iommu_devinfo_cache, info); + spin_unlock_irqrestore(&device_domain_lock, flags); +} + +static void detach_device(struct device *dev, struct fsl_dma_domain *dma_domain) +{ + struct device_domain_info *info, *tmp; + unsigned long flags; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + /* Remove the device from the domain device list */ + list_for_each_entry_safe(info, tmp, &dma_domain->devices, link) { + if (!dev || (info->dev == dev)) + remove_device_ref(info, dma_domain->win_cnt); + } + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); +} + +static void attach_device(struct fsl_dma_domain *dma_domain, int liodn, struct device *dev) +{ + struct device_domain_info *info, *old_domain_info; + unsigned long flags; + + spin_lock_irqsave(&device_domain_lock, flags); + /* + * Check here if the device is already attached to domain or not. + * If the device is already attached to a domain detach it. + */ + old_domain_info = dev->archdata.iommu_domain; + if (old_domain_info && old_domain_info->domain != dma_domain) { + spin_unlock_irqrestore(&device_domain_lock, flags); + detach_device(dev, old_domain_info->domain); + spin_lock_irqsave(&device_domain_lock, flags); + } + + info = kmem_cache_zalloc(iommu_devinfo_cache, GFP_ATOMIC); + + info->dev = dev; + info->liodn = liodn; + info->domain = dma_domain; + + list_add(&info->link, &dma_domain->devices); + /* + * In case of devices with multiple LIODNs just store + * the info for the first LIODN as all + * LIODNs share the same domain + */ + if (!dev->archdata.iommu_domain) + dev->archdata.iommu_domain = info; + spin_unlock_irqrestore(&device_domain_lock, flags); + +} + +static phys_addr_t fsl_pamu_iova_to_phys(struct iommu_domain *domain, + dma_addr_t iova) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + + if ((iova < domain->geometry.aperture_start) || + iova > (domain->geometry.aperture_end)) + return 0; + + return get_phys_addr(dma_domain, iova); +} + +static int fsl_pamu_domain_has_cap(struct iommu_domain *domain, + unsigned long cap) +{ + return cap == IOMMU_CAP_CACHE_COHERENCY; +} + +static void fsl_pamu_domain_destroy(struct iommu_domain *domain) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + + domain->priv = NULL; + + /* remove all the devices from the device list */ + detach_device(NULL, dma_domain); + + dma_domain->enabled = 0; + dma_domain->mapped = 0; + + kmem_cache_free(fsl_pamu_domain_cache, dma_domain); +} + +static int fsl_pamu_domain_init(struct iommu_domain *domain) +{ + struct fsl_dma_domain *dma_domain; + + dma_domain = iommu_alloc_dma_domain(); + if (!dma_domain) { + pr_debug("dma_domain allocation failed\n"); + return -ENOMEM; + } + domain->priv = dma_domain; + dma_domain->iommu_domain = domain; + /* defaul geometry 64 GB i.e. maximum system address */ + domain->geometry.aperture_start = 0; + domain->geometry.aperture_end = (1ULL << 36) - 1; + domain->geometry.force_aperture = true; + + return 0; +} + +/* Configure geometry settings for all LIODNs associated with domain */ +static int pamu_set_domain_geometry(struct fsl_dma_domain *dma_domain, + struct iommu_domain_geometry *geom_attr, + u32 win_cnt) +{ + struct device_domain_info *info; + int ret = 0; + + list_for_each_entry(info, &dma_domain->devices, link) { + ret = pamu_set_liodn(info->liodn, info->dev, dma_domain, + geom_attr, win_cnt); + if (ret) + break; + } + + return ret; +} + +/* Update stash destination for all LIODNs associated with the domain */ +static int update_domain_stash(struct fsl_dma_domain *dma_domain, u32 val) +{ + struct device_domain_info *info; + int ret = 0; + + list_for_each_entry(info, &dma_domain->devices, link) { + ret = update_liodn_stash(info->liodn, dma_domain, val); + if (ret) + break; + } + + return ret; +} + +/* Update domain mappings for all LIODNs associated with the domain */ +static int update_domain_mapping(struct fsl_dma_domain *dma_domain, u32 wnd_nr) +{ + struct device_domain_info *info; + int ret = 0; + + list_for_each_entry(info, &dma_domain->devices, link) { + ret = update_liodn(info->liodn, dma_domain, wnd_nr); + if (ret) + break; + } + return ret; +} + +static int disable_domain_win(struct fsl_dma_domain *dma_domain, u32 wnd_nr) +{ + struct device_domain_info *info; + int ret = 0; + + list_for_each_entry(info, &dma_domain->devices, link) { + if (dma_domain->win_cnt == 1 && dma_domain->enabled) { + ret = pamu_disable_liodn(info->liodn); + if (!ret) + dma_domain->enabled = 0; + } else { + ret = pamu_disable_spaace(info->liodn, wnd_nr); + } + } + + return ret; +} + +static void fsl_pamu_window_disable(struct iommu_domain *domain, u32 wnd_nr) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + unsigned long flags; + int ret; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + if (!dma_domain->win_arr) { + pr_debug("Number of windows not configured\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return; + } + + if (wnd_nr >= dma_domain->win_cnt) { + pr_debug("Invalid window index\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return; + } + + if (dma_domain->win_arr[wnd_nr].valid) { + ret = disable_domain_win(dma_domain, wnd_nr); + if (!ret) { + dma_domain->win_arr[wnd_nr].valid = 0; + dma_domain->mapped--; + } + } + + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + +} + +static int fsl_pamu_window_enable(struct iommu_domain *domain, u32 wnd_nr, + phys_addr_t paddr, u64 size, int prot) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + struct dma_window *wnd; + int pamu_prot = 0; + int ret; + unsigned long flags; + u64 win_size; + + if (prot & IOMMU_READ) + pamu_prot |= PAACE_AP_PERMS_QUERY; + if (prot & IOMMU_WRITE) + pamu_prot |= PAACE_AP_PERMS_UPDATE; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + if (!dma_domain->win_arr) { + pr_debug("Number of windows not configured\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -ENODEV; + } + + if (wnd_nr >= dma_domain->win_cnt) { + pr_debug("Invalid window index\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + + win_size = dma_domain->geom_size >> ilog2(dma_domain->win_cnt); + if (size > win_size) { + pr_debug("Invalid window size \n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + + if (dma_domain->win_cnt == 1) { + if (dma_domain->enabled) { + pr_debug("Disable the window before updating the mapping\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EBUSY; + } + + ret = check_size(size, domain->geometry.aperture_start); + if (ret) { + pr_debug("Aperture start not aligned to the size\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + } + + wnd = &dma_domain->win_arr[wnd_nr]; + if (!wnd->valid) { + wnd->paddr = paddr; + wnd->size = size; + wnd->prot = pamu_prot; + + ret = update_domain_mapping(dma_domain, wnd_nr); + if (!ret) { + wnd->valid = 1; + dma_domain->mapped++; + } + } else { + pr_debug("Disable the window before updating the mapping\n"); + ret = -EBUSY; + } + + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return ret; +} + +/* + * Attach the LIODN to the DMA domain and configure the geometry + * and window mappings. + */ +static int handle_attach_device(struct fsl_dma_domain *dma_domain, + struct device *dev, const u32 *liodn, + int num) +{ + unsigned long flags; + struct iommu_domain *domain = dma_domain->iommu_domain; + int ret = 0; + int i; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + for (i = 0; i < num; i++) { + + /* Ensure that LIODN value is valid */ + if (liodn[i] >= PAACE_NUMBER_ENTRIES) { + pr_debug("Invalid liodn %d, attach device failed for %s\n", + liodn[i], dev->of_node->full_name); + ret = -EINVAL; + break; + } + + attach_device(dma_domain, liodn[i], dev); + /* + * Check if geometry has already been configured + * for the domain. If yes, set the geometry for + * the LIODN. + */ + if (dma_domain->win_arr) { + u32 win_cnt = dma_domain->win_cnt > 1 ? dma_domain->win_cnt : 0; + ret = pamu_set_liodn(liodn[i], dev, dma_domain, + &domain->geometry, + win_cnt); + if (ret) + break; + if (dma_domain->mapped) { + /* + * Create window/subwindow mapping for + * the LIODN. + */ + ret = map_liodn(liodn[i], dma_domain); + if (ret) + break; + } + } + } + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return ret; +} + +static int fsl_pamu_attach_device(struct iommu_domain *domain, + struct device *dev) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + const u32 *liodn; + u32 liodn_cnt; + int len, ret = 0; + struct pci_dev *pdev = NULL; + struct pci_controller *pci_ctl; + + /* + * Use LIODN of the PCI controller while attaching a + * PCI device. + */ + if (dev_is_pci(dev)) { + pdev = to_pci_dev(dev); + pci_ctl = pci_bus_to_host(pdev->bus); + /* + * make dev point to pci controller device + * so we can get the LIODN programmed by + * u-boot. + */ + dev = pci_ctl->parent; + } + + liodn = of_get_property(dev->of_node, "fsl,liodn", &len); + if (liodn) { + liodn_cnt = len / sizeof(u32); + ret = handle_attach_device(dma_domain, dev, + liodn, liodn_cnt); + } else { + pr_debug("missing fsl,liodn property at %s\n", + dev->of_node->full_name); + ret = -EINVAL; + } + + return ret; +} + +static void fsl_pamu_detach_device(struct iommu_domain *domain, + struct device *dev) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + const u32 *prop; + int len; + struct pci_dev *pdev = NULL; + struct pci_controller *pci_ctl; + + /* + * Use LIODN of the PCI controller while detaching a + * PCI device. + */ + if (dev_is_pci(dev)) { + pdev = to_pci_dev(dev); + pci_ctl = pci_bus_to_host(pdev->bus); + /* + * make dev point to pci controller device + * so we can get the LIODN programmed by + * u-boot. + */ + dev = pci_ctl->parent; + } + + prop = of_get_property(dev->of_node, "fsl,liodn", &len); + if (prop) + detach_device(dev, dma_domain); + else + pr_debug("missing fsl,liodn property at %s\n", + dev->of_node->full_name); +} + +static int configure_domain_geometry(struct iommu_domain *domain, void *data) +{ + struct iommu_domain_geometry *geom_attr = data; + struct fsl_dma_domain *dma_domain = domain->priv; + dma_addr_t geom_size; + unsigned long flags; + + geom_size = geom_attr->aperture_end - geom_attr->aperture_start + 1; + /* + * Sanity check the geometry size. Also, we do not support + * DMA outside of the geometry. + */ + if (check_size(geom_size, geom_attr->aperture_start) || + !geom_attr->force_aperture) { + pr_debug("Invalid PAMU geometry attributes\n"); + return -EINVAL; + } + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + if (dma_domain->enabled) { + pr_debug("Can't set geometry attributes as domain is active\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EBUSY; + } + + /* Copy the domain geometry information */ + memcpy(&domain->geometry, geom_attr, + sizeof(struct iommu_domain_geometry)); + dma_domain->geom_size = geom_size; + + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return 0; +} + +/* Set the domain stash attribute */ +static int configure_domain_stash(struct fsl_dma_domain *dma_domain, void *data) +{ + struct pamu_stash_attribute *stash_attr = data; + unsigned long flags; + int ret; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + + memcpy(&dma_domain->dma_stash, stash_attr, + sizeof(struct pamu_stash_attribute)); + + dma_domain->stash_id = get_stash_id(stash_attr->cache, + stash_attr->cpu); + if (dma_domain->stash_id == ~(u32)0) { + pr_debug("Invalid stash attributes\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + + ret = update_domain_stash(dma_domain, dma_domain->stash_id); + + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return ret; +} + +/* Configure domain dma state i.e. enable/disable DMA*/ +static int configure_domain_dma_state(struct fsl_dma_domain *dma_domain, bool enable) +{ + struct device_domain_info *info; + unsigned long flags; + int ret; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + + if (enable && !dma_domain->mapped) { + pr_debug("Can't enable DMA domain without valid mapping\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -ENODEV; + } + + dma_domain->enabled = enable; + list_for_each_entry(info, &dma_domain->devices, + link) { + ret = (enable) ? pamu_enable_liodn(info->liodn) : + pamu_disable_liodn(info->liodn); + if (ret) + pr_debug("Unable to set dma state for liodn %d", + info->liodn); + } + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return 0; +} + +static int fsl_pamu_set_domain_attr(struct iommu_domain *domain, + enum iommu_attr attr_type, void *data) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + int ret = 0; + + + switch (attr_type) { + case DOMAIN_ATTR_GEOMETRY: + ret = configure_domain_geometry(domain, data); + break; + case DOMAIN_ATTR_FSL_PAMU_STASH: + ret = configure_domain_stash(dma_domain, data); + break; + case DOMAIN_ATTR_FSL_PAMU_ENABLE: + ret = configure_domain_dma_state(dma_domain, *(int *)data); + break; + default: + pr_debug("Unsupported attribute type\n"); + ret = -EINVAL; + break; + }; + + return ret; +} + +static int fsl_pamu_get_domain_attr(struct iommu_domain *domain, + enum iommu_attr attr_type, void *data) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + int ret = 0; + + + switch (attr_type) { + case DOMAIN_ATTR_FSL_PAMU_STASH: + memcpy((struct pamu_stash_attribute *) data, &dma_domain->dma_stash, + sizeof(struct pamu_stash_attribute)); + break; + case DOMAIN_ATTR_FSL_PAMU_ENABLE: + *(int *)data = dma_domain->enabled; + break; + case DOMAIN_ATTR_FSL_PAMUV1: + *(int *)data = DOMAIN_ATTR_FSL_PAMUV1; + break; + default: + pr_debug("Unsupported attribute type\n"); + ret = -EINVAL; + break; + }; + + return ret; +} + +#define REQ_ACS_FLAGS (PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF) + +static struct iommu_group *get_device_iommu_group(struct device *dev) +{ + struct iommu_group *group; + + group = iommu_group_get(dev); + if (!group) + group = iommu_group_alloc(); + + return group; +} + +static bool check_pci_ctl_endpt_part(struct pci_controller *pci_ctl) +{ + u32 version; + + /* Check the PCI controller version number by readding BRR1 register */ + version = in_be32(pci_ctl->cfg_addr + (PCI_FSL_BRR1 >> 2)); + version &= PCI_FSL_BRR1_VER; + /* If PCI controller version is >= 0x204 we can partition endpoints*/ + if (version >= 0x204) + return 1; + + return 0; +} + +/* Get iommu group information from peer devices or devices on the parent bus */ +static struct iommu_group *get_shared_pci_device_group(struct pci_dev *pdev) +{ + struct pci_dev *tmp; + struct iommu_group *group; + struct pci_bus *bus = pdev->bus; + + /* + * Traverese the pci bus device list to get + * the shared iommu group. + */ + while (bus) { + list_for_each_entry(tmp, &bus->devices, bus_list) { + if (tmp == pdev) + continue; + group = iommu_group_get(&tmp->dev); + if (group) + return group; + } + + bus = bus->parent; + } + + return NULL; +} + +static struct iommu_group *get_pci_device_group(struct pci_dev *pdev) +{ + struct pci_controller *pci_ctl; + bool pci_endpt_partioning; + struct iommu_group *group = NULL; + struct pci_dev *bridge, *dma_pdev = NULL; + + pci_ctl = pci_bus_to_host(pdev->bus); + pci_endpt_partioning = check_pci_ctl_endpt_part(pci_ctl); + /* We can partition PCIe devices so assign device group to the device */ + if (pci_endpt_partioning) { + bridge = pci_find_upstream_pcie_bridge(pdev); + if (bridge) { + if (pci_is_pcie(bridge)) + dma_pdev = pci_get_domain_bus_and_slot( + pci_domain_nr(pdev->bus), + bridge->subordinate->number, 0); + if (!dma_pdev) + dma_pdev = pci_dev_get(bridge); + } else + dma_pdev = pci_dev_get(pdev); + + /* Account for quirked devices */ + swap_pci_ref(&dma_pdev, pci_get_dma_source(dma_pdev)); + + /* + * If it's a multifunction device that does not support our + * required ACS flags, add to the same group as lowest numbered + * function that also does not suport the required ACS flags. + */ + if (dma_pdev->multifunction && + !pci_acs_enabled(dma_pdev, REQ_ACS_FLAGS)) { + u8 i, slot = PCI_SLOT(dma_pdev->devfn); + + for (i = 0; i < 8; i++) { + struct pci_dev *tmp; + + tmp = pci_get_slot(dma_pdev->bus, PCI_DEVFN(slot, i)); + if (!tmp) + continue; + + if (!pci_acs_enabled(tmp, REQ_ACS_FLAGS)) { + swap_pci_ref(&dma_pdev, tmp); + break; + } + pci_dev_put(tmp); + } + } + + /* + * Devices on the root bus go through the iommu. If that's not us, + * find the next upstream device and test ACS up to the root bus. + * Finding the next device may require skipping virtual buses. + */ + while (!pci_is_root_bus(dma_pdev->bus)) { + struct pci_bus *bus = dma_pdev->bus; + + while (!bus->self) { + if (!pci_is_root_bus(bus)) + bus = bus->parent; + else + goto root_bus; + } + + if (pci_acs_path_enabled(bus->self, NULL, REQ_ACS_FLAGS)) + break; + + swap_pci_ref(&dma_pdev, pci_dev_get(bus->self)); + } + +root_bus: + group = get_device_iommu_group(&dma_pdev->dev); + pci_dev_put(dma_pdev); + /* + * PCIe controller is not a paritionable entity + * free the controller device iommu_group. + */ + if (pci_ctl->parent->iommu_group) + iommu_group_remove_device(pci_ctl->parent); + } else { + /* + * All devices connected to the controller will share the + * PCI controllers device group. If this is the first + * device to be probed for the pci controller, copy the + * device group information from the PCI controller device + * node and remove the PCI controller iommu group. + * For subsequent devices, the iommu group information can + * be obtained from sibling devices (i.e. from the bus_devices + * link list). + */ + if (pci_ctl->parent->iommu_group) { + group = get_device_iommu_group(pci_ctl->parent); + iommu_group_remove_device(pci_ctl->parent); + } else + group = get_shared_pci_device_group(pdev); + } + + if (!group) + group = ERR_PTR(-ENODEV); + + return group; +} + +static int fsl_pamu_add_device(struct device *dev) +{ + struct iommu_group *group = ERR_PTR(-ENODEV); + struct pci_dev *pdev; + const u32 *prop; + int ret, len; + + /* + * For platform devices we allocate a separate group for + * each of the devices. + */ + if (dev_is_pci(dev)) { + pdev = to_pci_dev(dev); + /* Don't create device groups for virtual PCI bridges */ + if (pdev->subordinate) + return 0; + + group = get_pci_device_group(pdev); + + } else { + prop = of_get_property(dev->of_node, "fsl,liodn", &len); + if (prop) + group = get_device_iommu_group(dev); + } + + if (IS_ERR(group)) + return PTR_ERR(group); + + ret = iommu_group_add_device(group, dev); + + iommu_group_put(group); + return ret; +} + +static void fsl_pamu_remove_device(struct device *dev) +{ + iommu_group_remove_device(dev); +} + +static int fsl_pamu_set_windows(struct iommu_domain *domain, u32 w_count) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + unsigned long flags; + int ret; + + spin_lock_irqsave(&dma_domain->domain_lock, flags); + /* Ensure domain is inactive i.e. DMA should be disabled for the domain */ + if (dma_domain->enabled) { + pr_debug("Can't set geometry attributes as domain is active\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EBUSY; + } + + /* Ensure that the geometry has been set for the domain */ + if (!dma_domain->geom_size) { + pr_debug("Please configure geometry before setting the number of windows\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + + /* + * Ensure we have valid window count i.e. it should be less than + * maximum permissible limit and should be a power of two. + */ + if (w_count > pamu_get_max_subwin_cnt() || !is_power_of_2(w_count)) { + pr_debug("Invalid window count\n"); + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -EINVAL; + } + + ret = pamu_set_domain_geometry(dma_domain, &domain->geometry, + ((w_count > 1) ? w_count : 0)); + if (!ret) { + if (dma_domain->win_arr) + kfree(dma_domain->win_arr); + dma_domain->win_arr = kzalloc(sizeof(struct dma_window) * + w_count, GFP_ATOMIC); + if (!dma_domain->win_arr) { + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + return -ENOMEM; + } + dma_domain->win_cnt = w_count; + } + spin_unlock_irqrestore(&dma_domain->domain_lock, flags); + + return ret; +} + +static u32 fsl_pamu_get_windows(struct iommu_domain *domain) +{ + struct fsl_dma_domain *dma_domain = domain->priv; + + return dma_domain->win_cnt; +} + +static struct iommu_ops fsl_pamu_ops = { + .domain_init = fsl_pamu_domain_init, + .domain_destroy = fsl_pamu_domain_destroy, + .attach_dev = fsl_pamu_attach_device, + .detach_dev = fsl_pamu_detach_device, + .domain_window_enable = fsl_pamu_window_enable, + .domain_window_disable = fsl_pamu_window_disable, + .domain_get_windows = fsl_pamu_get_windows, + .domain_set_windows = fsl_pamu_set_windows, + .iova_to_phys = fsl_pamu_iova_to_phys, + .domain_has_cap = fsl_pamu_domain_has_cap, + .domain_set_attr = fsl_pamu_set_domain_attr, + .domain_get_attr = fsl_pamu_get_domain_attr, + .add_device = fsl_pamu_add_device, + .remove_device = fsl_pamu_remove_device, +}; + +int pamu_domain_init() +{ + int ret = 0; + + ret = iommu_init_mempool(); + if (ret) + return ret; + + bus_set_iommu(&platform_bus_type, &fsl_pamu_ops); + bus_set_iommu(&pci_bus_type, &fsl_pamu_ops); + + return ret; +} diff --git a/drivers/iommu/fsl_pamu_domain.h b/drivers/iommu/fsl_pamu_domain.h new file mode 100644 index 00000000000..c90293f9970 --- /dev/null +++ b/drivers/iommu/fsl_pamu_domain.h @@ -0,0 +1,85 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright (C) 2013 Freescale Semiconductor, Inc. + * + */ + +#ifndef __FSL_PAMU_DOMAIN_H +#define __FSL_PAMU_DOMAIN_H + +#include "fsl_pamu.h" + +struct dma_window { + phys_addr_t paddr; + u64 size; + int valid; + int prot; +}; + +struct fsl_dma_domain { + /* + * Indicates the geometry size for the domain. + * This would be set when the geometry is + * configured for the domain. + */ + dma_addr_t geom_size; + /* + * Number of windows assocaited with this domain. + * During domain initialization, it is set to the + * the maximum number of subwindows allowed for a LIODN. + * Minimum value for this is 1 indicating a single PAMU + * window, without any sub windows. Value can be set/ + * queried by set_attr/get_attr API for DOMAIN_ATTR_WINDOWS. + * Value can only be set once the geometry has been configured. + */ + u32 win_cnt; + /* + * win_arr contains information of the configured + * windows for a domain. This is allocated only + * when the number of windows for the domain are + * set. + */ + struct dma_window *win_arr; + /* list of devices associated with the domain */ + struct list_head devices; + /* dma_domain states: + * mapped - A particular mapping has been created + * within the configured geometry. + * enabled - DMA has been enabled for the given + * domain. This translates to setting of the + * valid bit for the primary PAACE in the PAMU + * PAACT table. Domain geometry should be set and + * it must have a valid mapping before DMA can be + * enabled for it. + * + */ + int mapped; + int enabled; + /* stash_id obtained from the stash attribute details */ + u32 stash_id; + struct pamu_stash_attribute dma_stash; + u32 snoop_id; + struct iommu_domain *iommu_domain; + spinlock_t domain_lock; +}; + +/* domain-device relationship */ +struct device_domain_info { + struct list_head link; /* link to domain siblings */ + struct device *dev; + u32 liodn; + struct fsl_dma_domain *domain; /* pointer to domain */ +}; +#endif /* __FSL_PAMU_DOMAIN_H */ diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index b9d09115788..51b6b77dc3e 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2006, Intel Corporation. + * Copyright © 2006-2014 Intel Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, @@ -10,15 +10,11 @@ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 Temple - * Place - Suite 330, Boston, MA 02111-1307 USA. - * - * Copyright (C) 2006-2008 Intel Corporation - * Author: Ashok Raj <ashok.raj@intel.com> - * Author: Shaohua Li <shaohua.li@intel.com> - * Author: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> - * Author: Fenghua Yu <fenghua.yu@intel.com> + * Authors: David Woodhouse <dwmw2@infradead.org>, + * Ashok Raj <ashok.raj@intel.com>, + * Shaohua Li <shaohua.li@intel.com>, + * Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>, + * Fenghua Yu <fenghua.yu@intel.com> */ #include <linux/init.h> @@ -33,6 +29,7 @@ #include <linux/dmar.h> #include <linux/dma-mapping.h> #include <linux/mempool.h> +#include <linux/memory.h> #include <linux/timer.h> #include <linux/iova.h> #include <linux/iommu.h> @@ -42,10 +39,14 @@ #include <linux/dmi.h> #include <linux/pci-ats.h> #include <linux/memblock.h> +#include <linux/dma-contiguous.h> #include <asm/irq_remapping.h> #include <asm/cacheflush.h> #include <asm/iommu.h> +#include "irq_remapping.h" +#include "pci.h" + #define ROOT_SIZE VTD_PAGE_SIZE #define CONTEXT_SIZE VTD_PAGE_SIZE @@ -60,6 +61,7 @@ #define DEFAULT_DOMAIN_ADDRESS_WIDTH 48 #define MAX_AGAW_WIDTH 64 +#define MAX_AGAW_PFN_WIDTH (MAX_AGAW_WIDTH - VTD_PAGE_SHIFT) #define __DOMAIN_MAX_PFN(gaw) ((((uint64_t)1) << (gaw-VTD_PAGE_SHIFT)) - 1) #define __DOMAIN_MAX_ADDR(gaw) ((((uint64_t)1) << gaw) - 1) @@ -103,12 +105,12 @@ static inline int agaw_to_level(int agaw) static inline int agaw_to_width(int agaw) { - return 30 + agaw * LEVEL_STRIDE; + return min_t(int, 30 + agaw * LEVEL_STRIDE, MAX_AGAW_WIDTH); } static inline int width_to_agaw(int width) { - return (width - 30) / LEVEL_STRIDE; + return DIV_ROUND_UP(width - 30, LEVEL_STRIDE); } static inline unsigned int level_to_offset_bits(int level) @@ -138,7 +140,7 @@ static inline unsigned long align_to_level(unsigned long pfn, int level) static inline unsigned long lvl_to_nr_pages(unsigned int lvl) { - return 1 << ((lvl - 1) * LEVEL_STRIDE); + return 1 << min_t(int, (lvl - 1) * LEVEL_STRIDE, MAX_AGAW_PFN_WIDTH); } /* VT-d pages must always be _smaller_ than MM pages. Otherwise things @@ -285,26 +287,6 @@ static inline void dma_clear_pte(struct dma_pte *pte) pte->val = 0; } -static inline void dma_set_pte_readable(struct dma_pte *pte) -{ - pte->val |= DMA_PTE_READ; -} - -static inline void dma_set_pte_writable(struct dma_pte *pte) -{ - pte->val |= DMA_PTE_WRITE; -} - -static inline void dma_set_pte_snp(struct dma_pte *pte) -{ - pte->val |= DMA_PTE_SNP; -} - -static inline void dma_set_pte_prot(struct dma_pte *pte, unsigned long prot) -{ - pte->val = (pte->val & ~3) | (prot & 3); -} - static inline u64 dma_pte_addr(struct dma_pte *pte) { #ifdef CONFIG_64BIT @@ -315,11 +297,6 @@ static inline u64 dma_pte_addr(struct dma_pte *pte) #endif } -static inline void dma_set_pte_pfn(struct dma_pte *pte, unsigned long pfn) -{ - pte->val |= (uint64_t)pfn << VTD_PAGE_SHIFT; -} - static inline bool dma_pte_present(struct dma_pte *pte) { return (pte->val & 3) != 0; @@ -393,23 +370,46 @@ struct dmar_domain { struct device_domain_info { struct list_head link; /* link to domain siblings */ struct list_head global; /* link to global list */ - int segment; /* PCI domain */ u8 bus; /* PCI bus number */ u8 devfn; /* PCI devfn number */ - struct pci_dev *dev; /* it's NULL for PCIe-to-PCI bridge */ + struct device *dev; /* it's NULL for PCIe-to-PCI bridge */ struct intel_iommu *iommu; /* IOMMU used by this device */ struct dmar_domain *domain; /* pointer to domain */ }; +struct dmar_rmrr_unit { + struct list_head list; /* list of rmrr units */ + struct acpi_dmar_header *hdr; /* ACPI header */ + u64 base_address; /* reserved base address*/ + u64 end_address; /* reserved end address */ + struct dmar_dev_scope *devices; /* target devices */ + int devices_cnt; /* target device count */ +}; + +struct dmar_atsr_unit { + struct list_head list; /* list of ATSR units */ + struct acpi_dmar_header *hdr; /* ACPI header */ + struct dmar_dev_scope *devices; /* target devices */ + int devices_cnt; /* target device count */ + u8 include_all:1; /* include all ports */ +}; + +static LIST_HEAD(dmar_atsr_units); +static LIST_HEAD(dmar_rmrr_units); + +#define for_each_rmrr_units(rmrr) \ + list_for_each_entry(rmrr, &dmar_rmrr_units, list) + static void flush_unmaps_timeout(unsigned long data); -DEFINE_TIMER(unmap_timer, flush_unmaps_timeout, 0, 0); +static DEFINE_TIMER(unmap_timer, flush_unmaps_timeout, 0, 0); #define HIGH_WATER_MARK 250 struct deferred_flush_tables { int next; struct iova *iova[HIGH_WATER_MARK]; struct dmar_domain *domain[HIGH_WATER_MARK]; + struct page *freelist[HIGH_WATER_MARK]; }; static struct deferred_flush_tables *deferred_flush; @@ -423,7 +423,12 @@ static LIST_HEAD(unmaps_to_do); static int timer_on; static long list_size; +static void domain_exit(struct dmar_domain *domain); static void domain_remove_dev_info(struct dmar_domain *domain); +static void domain_remove_one_dev_info(struct dmar_domain *domain, + struct device *dev); +static void iommu_detach_dependent_devices(struct intel_iommu *iommu, + struct device *dev); #ifdef CONFIG_INTEL_IOMMU_DEFAULT_ON int dmar_disabled = 0; @@ -587,18 +592,31 @@ static struct intel_iommu *domain_get_iommu(struct dmar_domain *domain) static void domain_update_iommu_coherency(struct dmar_domain *domain) { - int i; - - i = find_first_bit(domain->iommu_bmp, g_num_of_iommus); + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; + int i, found = 0; - domain->iommu_coherency = i < g_num_of_iommus ? 1 : 0; + domain->iommu_coherency = 1; for_each_set_bit(i, domain->iommu_bmp, g_num_of_iommus) { + found = 1; if (!ecap_coherent(g_iommus[i]->ecap)) { domain->iommu_coherency = 0; break; } } + if (found) + return; + + /* No hardware attached; use lowest common denominator */ + rcu_read_lock(); + for_each_active_iommu(iommu, drhd) { + if (!ecap_coherent(iommu->ecap)) { + domain->iommu_coherency = 0; + break; + } + } + rcu_read_unlock(); } static void domain_update_iommu_snooping(struct dmar_domain *domain) @@ -627,12 +645,15 @@ static void domain_update_iommu_superpage(struct dmar_domain *domain) } /* set iommu_superpage to the smallest common denominator */ + rcu_read_lock(); for_each_active_iommu(iommu, drhd) { mask &= cap_super_page_val(iommu->cap); if (!mask) { break; } } + rcu_read_unlock(); + domain->iommu_superpage = fls(mask); } @@ -644,34 +665,56 @@ static void domain_update_iommu_cap(struct dmar_domain *domain) domain_update_iommu_superpage(domain); } -static struct intel_iommu *device_to_iommu(int segment, u8 bus, u8 devfn) +static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn) { struct dmar_drhd_unit *drhd = NULL; + struct intel_iommu *iommu; + struct device *tmp; + struct pci_dev *ptmp, *pdev = NULL; + u16 segment; int i; - for_each_drhd_unit(drhd) { - if (drhd->ignored) - continue; - if (segment != drhd->segment) + if (dev_is_pci(dev)) { + pdev = to_pci_dev(dev); + segment = pci_domain_nr(pdev->bus); + } else if (ACPI_COMPANION(dev)) + dev = &ACPI_COMPANION(dev)->dev; + + rcu_read_lock(); + for_each_active_iommu(iommu, drhd) { + if (pdev && segment != drhd->segment) continue; - for (i = 0; i < drhd->devices_cnt; i++) { - if (drhd->devices[i] && - drhd->devices[i]->bus->number == bus && - drhd->devices[i]->devfn == devfn) - return drhd->iommu; - if (drhd->devices[i] && - drhd->devices[i]->subordinate && - drhd->devices[i]->subordinate->number <= bus && - drhd->devices[i]->subordinate->busn_res.end >= bus) - return drhd->iommu; + for_each_active_dev_scope(drhd->devices, + drhd->devices_cnt, i, tmp) { + if (tmp == dev) { + *bus = drhd->devices[i].bus; + *devfn = drhd->devices[i].devfn; + goto out; + } + + if (!pdev || !dev_is_pci(tmp)) + continue; + + ptmp = to_pci_dev(tmp); + if (ptmp->subordinate && + ptmp->subordinate->number <= pdev->bus->number && + ptmp->subordinate->busn_res.end >= pdev->bus->number) + goto got_pdev; } - if (drhd->include_all) - return drhd->iommu; + if (pdev && drhd->include_all) { + got_pdev: + *bus = pdev->bus->number; + *devfn = pdev->devfn; + goto out; + } } + iommu = NULL; + out: + rcu_read_unlock(); - return NULL; + return iommu; } static void domain_flush_cache(struct dmar_domain *domain, @@ -771,7 +814,7 @@ out: } static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, - unsigned long pfn, int target_level) + unsigned long pfn, int *target_level) { int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; struct dma_pte *parent, *pte = NULL; @@ -779,17 +822,21 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, int offset; BUG_ON(!domain->pgd); - BUG_ON(addr_width < BITS_PER_LONG && pfn >> addr_width); + + if (addr_width < BITS_PER_LONG && pfn >> addr_width) + /* Address beyond IOMMU's addressing capabilities. */ + return NULL; + parent = domain->pgd; - while (level > 0) { + while (1) { void *tmp_page; offset = pfn_level_offset(pfn, level); pte = &parent[offset]; - if (!target_level && (dma_pte_superpage(pte) || !dma_pte_present(pte))) + if (!*target_level && (dma_pte_superpage(pte) || !dma_pte_present(pte))) break; - if (level == target_level) + if (level == *target_level) break; if (!dma_pte_present(pte)) { @@ -810,10 +857,16 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, domain_flush_cache(domain, pte, sizeof(*pte)); } } + if (level == 1) + break; + parent = phys_to_virt(dma_pte_addr(pte)); level--; } + if (!*target_level) + *target_level = level; + return pte; } @@ -851,14 +904,13 @@ static struct dma_pte *dma_pfn_level_pte(struct dmar_domain *domain, } /* clear last level pte, a tlb flush should be followed */ -static int dma_pte_clear_range(struct dmar_domain *domain, +static void dma_pte_clear_range(struct dmar_domain *domain, unsigned long start_pfn, unsigned long last_pfn) { int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; unsigned int large_page = 1; struct dma_pte *first_pte, *pte; - int order; BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); @@ -882,9 +934,39 @@ static int dma_pte_clear_range(struct dmar_domain *domain, (void *)pte - (void *)first_pte); } while (start_pfn && start_pfn <= last_pfn); +} + +static void dma_pte_free_level(struct dmar_domain *domain, int level, + struct dma_pte *pte, unsigned long pfn, + unsigned long start_pfn, unsigned long last_pfn) +{ + pfn = max(start_pfn, pfn); + pte = &pte[pfn_level_offset(pfn, level)]; - order = (large_page - 1) * 9; - return order; + do { + unsigned long level_pfn; + struct dma_pte *level_pte; + + if (!dma_pte_present(pte) || dma_pte_superpage(pte)) + goto next; + + level_pfn = pfn & level_mask(level - 1); + level_pte = phys_to_virt(dma_pte_addr(pte)); + + if (level > 2) + dma_pte_free_level(domain, level - 1, level_pte, + level_pfn, start_pfn, last_pfn); + + /* If range covers entire pagetable, free it */ + if (!(start_pfn > level_pfn || + last_pfn < level_pfn + level_size(level) - 1)) { + dma_clear_pte(pte); + domain_flush_cache(domain, pte, sizeof(*pte)); + free_pgtable_page(level_pte); + } +next: + pfn += level_size(level); + } while (!first_pte_in_page(++pte) && pfn <= last_pfn); } /* free page table pages. last level pte should already be cleared */ @@ -893,55 +975,139 @@ static void dma_pte_free_pagetable(struct dmar_domain *domain, unsigned long last_pfn) { int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; - struct dma_pte *first_pte, *pte; - int total = agaw_to_level(domain->agaw); - int level; - unsigned long tmp; - int large_page = 2; BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); BUG_ON(start_pfn > last_pfn); /* We don't need lock here; nobody else touches the iova range */ - level = 2; - while (level <= total) { - tmp = align_to_level(start_pfn, level); + dma_pte_free_level(domain, agaw_to_level(domain->agaw), + domain->pgd, 0, start_pfn, last_pfn); - /* If we can't even clear one PTE at this level, we're done */ - if (tmp + level_size(level) - 1 > last_pfn) - return; + /* free pgd */ + if (start_pfn == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) { + free_pgtable_page(domain->pgd); + domain->pgd = NULL; + } +} - do { - large_page = level; - first_pte = pte = dma_pfn_level_pte(domain, tmp, level, &large_page); - if (large_page > level) - level = large_page + 1; - if (!pte) { - tmp = align_to_level(tmp + 1, level + 1); - continue; - } - do { - if (dma_pte_present(pte)) { - free_pgtable_page(phys_to_virt(dma_pte_addr(pte))); - dma_clear_pte(pte); - } - pte++; - tmp += level_size(level); - } while (!first_pte_in_page(pte) && - tmp + level_size(level) - 1 <= last_pfn); +/* When a page at a given level is being unlinked from its parent, we don't + need to *modify* it at all. All we need to do is make a list of all the + pages which can be freed just as soon as we've flushed the IOTLB and we + know the hardware page-walk will no longer touch them. + The 'pte' argument is the *parent* PTE, pointing to the page that is to + be freed. */ +static struct page *dma_pte_list_pagetables(struct dmar_domain *domain, + int level, struct dma_pte *pte, + struct page *freelist) +{ + struct page *pg; + + pg = pfn_to_page(dma_pte_addr(pte) >> PAGE_SHIFT); + pg->freelist = freelist; + freelist = pg; + + if (level == 1) + return freelist; + + pte = page_address(pg); + do { + if (dma_pte_present(pte) && !dma_pte_superpage(pte)) + freelist = dma_pte_list_pagetables(domain, level - 1, + pte, freelist); + pte++; + } while (!first_pte_in_page(pte)); + + return freelist; +} + +static struct page *dma_pte_clear_level(struct dmar_domain *domain, int level, + struct dma_pte *pte, unsigned long pfn, + unsigned long start_pfn, + unsigned long last_pfn, + struct page *freelist) +{ + struct dma_pte *first_pte = NULL, *last_pte = NULL; + + pfn = max(start_pfn, pfn); + pte = &pte[pfn_level_offset(pfn, level)]; + + do { + unsigned long level_pfn; + + if (!dma_pte_present(pte)) + goto next; + + level_pfn = pfn & level_mask(level); + + /* If range covers entire pagetable, free it */ + if (start_pfn <= level_pfn && + last_pfn >= level_pfn + level_size(level) - 1) { + /* These suborbinate page tables are going away entirely. Don't + bother to clear them; we're just going to *free* them. */ + if (level > 1 && !dma_pte_superpage(pte)) + freelist = dma_pte_list_pagetables(domain, level - 1, pte, freelist); + + dma_clear_pte(pte); + if (!first_pte) + first_pte = pte; + last_pte = pte; + } else if (level > 1) { + /* Recurse down into a level that isn't *entirely* obsolete */ + freelist = dma_pte_clear_level(domain, level - 1, + phys_to_virt(dma_pte_addr(pte)), + level_pfn, start_pfn, last_pfn, + freelist); + } +next: + pfn += level_size(level); + } while (!first_pte_in_page(++pte) && pfn <= last_pfn); + + if (first_pte) + domain_flush_cache(domain, first_pte, + (void *)++last_pte - (void *)first_pte); + + return freelist; +} + +/* We can't just free the pages because the IOMMU may still be walking + the page tables, and may have cached the intermediate levels. The + pages can only be freed after the IOTLB flush has been done. */ +struct page *domain_unmap(struct dmar_domain *domain, + unsigned long start_pfn, + unsigned long last_pfn) +{ + int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; + struct page *freelist = NULL; + + BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); + BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); + BUG_ON(start_pfn > last_pfn); + + /* we don't need lock here; nobody else touches the iova range */ + freelist = dma_pte_clear_level(domain, agaw_to_level(domain->agaw), + domain->pgd, 0, start_pfn, last_pfn, NULL); - domain_flush_cache(domain, first_pte, - (void *)pte - (void *)first_pte); - - } while (tmp && tmp + level_size(level) - 1 <= last_pfn); - level++; - } /* free pgd */ if (start_pfn == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) { - free_pgtable_page(domain->pgd); + struct page *pgd_page = virt_to_page(domain->pgd); + pgd_page->freelist = freelist; + freelist = pgd_page; + domain->pgd = NULL; } + + return freelist; +} + +void dma_free_pagelist(struct page *freelist) +{ + struct page *pg; + + while ((pg = freelist)) { + freelist = pg->freelist; + free_pgtable_page(page_address(pg)); + } } /* iommu handling */ @@ -1053,7 +1219,7 @@ static void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, break; case DMA_TLB_PSI_FLUSH: val = DMA_TLB_PSI_FLUSH|DMA_TLB_IVT|DMA_TLB_DID(did); - /* Note: always flush non-leaf currently */ + /* IH bit is passed in as part of address */ val_iva = size_order | addr; break; default: @@ -1092,13 +1258,14 @@ static void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, (unsigned long long)DMA_TLB_IAIG(val)); } -static struct device_domain_info *iommu_support_dev_iotlb( - struct dmar_domain *domain, int segment, u8 bus, u8 devfn) +static struct device_domain_info * +iommu_support_dev_iotlb (struct dmar_domain *domain, struct intel_iommu *iommu, + u8 bus, u8 devfn) { int found = 0; unsigned long flags; struct device_domain_info *info; - struct intel_iommu *iommu = device_to_iommu(segment, bus, devfn); + struct pci_dev *pdev; if (!ecap_dev_iotlb_support(iommu->ecap)) return NULL; @@ -1114,34 +1281,35 @@ static struct device_domain_info *iommu_support_dev_iotlb( } spin_unlock_irqrestore(&device_domain_lock, flags); - if (!found || !info->dev) + if (!found || !info->dev || !dev_is_pci(info->dev)) return NULL; - if (!pci_find_ext_capability(info->dev, PCI_EXT_CAP_ID_ATS)) - return NULL; + pdev = to_pci_dev(info->dev); - if (!dmar_find_matched_atsr_unit(info->dev)) + if (!pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ATS)) return NULL; - info->iommu = iommu; + if (!dmar_find_matched_atsr_unit(pdev)) + return NULL; return info; } static void iommu_enable_dev_iotlb(struct device_domain_info *info) { - if (!info) + if (!info || !dev_is_pci(info->dev)) return; - pci_enable_ats(info->dev, VTD_PAGE_SHIFT); + pci_enable_ats(to_pci_dev(info->dev), VTD_PAGE_SHIFT); } static void iommu_disable_dev_iotlb(struct device_domain_info *info) { - if (!info->dev || !pci_ats_enabled(info->dev)) + if (!info->dev || !dev_is_pci(info->dev) || + !pci_ats_enabled(to_pci_dev(info->dev))) return; - pci_disable_ats(info->dev); + pci_disable_ats(to_pci_dev(info->dev)); } static void iommu_flush_dev_iotlb(struct dmar_domain *domain, @@ -1153,24 +1321,31 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain, spin_lock_irqsave(&device_domain_lock, flags); list_for_each_entry(info, &domain->devices, link) { - if (!info->dev || !pci_ats_enabled(info->dev)) + struct pci_dev *pdev; + if (!info->dev || !dev_is_pci(info->dev)) + continue; + + pdev = to_pci_dev(info->dev); + if (!pci_ats_enabled(pdev)) continue; sid = info->bus << 8 | info->devfn; - qdep = pci_ats_queue_depth(info->dev); + qdep = pci_ats_queue_depth(pdev); qi_flush_dev_iotlb(info->iommu, sid, qdep, addr, mask); } spin_unlock_irqrestore(&device_domain_lock, flags); } static void iommu_flush_iotlb_psi(struct intel_iommu *iommu, u16 did, - unsigned long pfn, unsigned int pages, int map) + unsigned long pfn, unsigned int pages, int ih, int map) { unsigned int mask = ilog2(__roundup_pow_of_two(pages)); uint64_t addr = (uint64_t)pfn << VTD_PAGE_SHIFT; BUG_ON(pages == 0); + if (ih) + ih = 1 << 6; /* * Fallback to domain selective flush if no PSI support or the size is * too big. @@ -1181,7 +1356,7 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu, u16 did, iommu->flush.flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH); else - iommu->flush.flush_iotlb(iommu, did, addr, mask, + iommu->flush.flush_iotlb(iommu, did, addr | ih, mask, DMA_TLB_PSI_FLUSH); /* @@ -1250,8 +1425,8 @@ static int iommu_init_domains(struct intel_iommu *iommu) unsigned long nlongs; ndomains = cap_ndoms(iommu->cap); - pr_debug("IOMMU %d: Number of Domains supported <%ld>\n", iommu->seq_id, - ndomains); + pr_debug("IOMMU%d: Number of Domains supported <%ld>\n", + iommu->seq_id, ndomains); nlongs = BITS_TO_LONGS(ndomains); spin_lock_init(&iommu->lock); @@ -1261,13 +1436,17 @@ static int iommu_init_domains(struct intel_iommu *iommu) */ iommu->domain_ids = kcalloc(nlongs, sizeof(unsigned long), GFP_KERNEL); if (!iommu->domain_ids) { - printk(KERN_ERR "Allocating domain id array failed\n"); + pr_err("IOMMU%d: allocating domain id array failed\n", + iommu->seq_id); return -ENOMEM; } iommu->domains = kcalloc(ndomains, sizeof(struct dmar_domain *), GFP_KERNEL); if (!iommu->domains) { - printk(KERN_ERR "Allocating domain array failed\n"); + pr_err("IOMMU%d: allocating domain array failed\n", + iommu->seq_id); + kfree(iommu->domain_ids); + iommu->domain_ids = NULL; return -ENOMEM; } @@ -1280,62 +1459,50 @@ static int iommu_init_domains(struct intel_iommu *iommu) return 0; } - -static void domain_exit(struct dmar_domain *domain); -static void vm_domain_exit(struct dmar_domain *domain); - -void free_dmar_iommu(struct intel_iommu *iommu) +static void free_dmar_iommu(struct intel_iommu *iommu) { struct dmar_domain *domain; - int i; + int i, count; unsigned long flags; if ((iommu->domains) && (iommu->domain_ids)) { for_each_set_bit(i, iommu->domain_ids, cap_ndoms(iommu->cap)) { + /* + * Domain id 0 is reserved for invalid translation + * if hardware supports caching mode. + */ + if (cap_caching_mode(iommu->cap) && i == 0) + continue; + domain = iommu->domains[i]; clear_bit(i, iommu->domain_ids); spin_lock_irqsave(&domain->iommu_lock, flags); - if (--domain->iommu_count == 0) { - if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) - vm_domain_exit(domain); - else - domain_exit(domain); - } + count = --domain->iommu_count; spin_unlock_irqrestore(&domain->iommu_lock, flags); + if (count == 0) + domain_exit(domain); } } if (iommu->gcmd & DMA_GCMD_TE) iommu_disable_translation(iommu); - if (iommu->irq) { - irq_set_handler_data(iommu->irq, NULL); - /* This will mask the irq */ - free_irq(iommu->irq, iommu); - destroy_irq(iommu->irq); - } - kfree(iommu->domains); kfree(iommu->domain_ids); + iommu->domains = NULL; + iommu->domain_ids = NULL; g_iommus[iommu->seq_id] = NULL; - /* if all iommus are freed, free g_iommus */ - for (i = 0; i < g_num_of_iommus; i++) { - if (g_iommus[i]) - break; - } - - if (i == g_num_of_iommus) - kfree(g_iommus); - /* free context mapping */ free_context_table(iommu); } -static struct dmar_domain *alloc_domain(void) +static struct dmar_domain *alloc_domain(bool vm) { + /* domain id for virtual machine, it won't be set in context */ + static atomic_t vm_domid = ATOMIC_INIT(0); struct dmar_domain *domain; domain = alloc_domain_mem(); @@ -1343,8 +1510,15 @@ static struct dmar_domain *alloc_domain(void) return NULL; domain->nid = -1; + domain->iommu_count = 0; memset(domain->iommu_bmp, 0, sizeof(domain->iommu_bmp)); domain->flags = 0; + spin_lock_init(&domain->iommu_lock); + INIT_LIST_HEAD(&domain->devices); + if (vm) { + domain->id = atomic_inc_return(&vm_domid); + domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE; + } return domain; } @@ -1368,6 +1542,7 @@ static int iommu_attach_domain(struct dmar_domain *domain, } domain->id = num; + domain->iommu_count++; set_bit(num, iommu->domain_ids); set_bit(iommu->seq_id, domain->iommu_bmp); iommu->domains[num] = domain; @@ -1381,22 +1556,16 @@ static void iommu_detach_domain(struct dmar_domain *domain, { unsigned long flags; int num, ndomains; - int found = 0; spin_lock_irqsave(&iommu->lock, flags); ndomains = cap_ndoms(iommu->cap); for_each_set_bit(num, iommu->domain_ids, ndomains) { if (iommu->domains[num] == domain) { - found = 1; + clear_bit(num, iommu->domain_ids); + iommu->domains[num] = NULL; break; } } - - if (found) { - clear_bit(num, iommu->domain_ids); - clear_bit(iommu->seq_id, domain->iommu_bmp); - iommu->domains[num] = NULL; - } spin_unlock_irqrestore(&iommu->lock, flags); } @@ -1468,8 +1637,6 @@ static int domain_init(struct dmar_domain *domain, int guest_width) unsigned long sagaw; init_iova_domain(&domain->iovad, DMA_32BIT_PFN); - spin_lock_init(&domain->iommu_lock); - domain_reserve_special_ranges(domain); /* calculate AGAW */ @@ -1488,7 +1655,6 @@ static int domain_init(struct dmar_domain *domain, int guest_width) return -ENODEV; } domain->agaw = agaw; - INIT_LIST_HEAD(&domain->devices); if (ecap_coherent(iommu->ecap)) domain->iommu_coherency = 1; @@ -1500,8 +1666,11 @@ static int domain_init(struct dmar_domain *domain, int guest_width) else domain->iommu_snooping = 0; - domain->iommu_superpage = fls(cap_super_page_val(iommu->cap)); - domain->iommu_count = 1; + if (intel_iommu_superpage) + domain->iommu_superpage = fls(cap_super_page_val(iommu->cap)); + else + domain->iommu_superpage = 0; + domain->nid = iommu->node; /* always allocate the top pgd */ @@ -1516,6 +1685,7 @@ static void domain_exit(struct dmar_domain *domain) { struct dmar_drhd_unit *drhd; struct intel_iommu *iommu; + struct page *freelist = NULL; /* Domain 0 is reserved, so dont process it */ if (!domain) @@ -1525,29 +1695,33 @@ static void domain_exit(struct dmar_domain *domain) if (!intel_iommu_strict) flush_unmaps_timeout(0); + /* remove associated devices */ domain_remove_dev_info(domain); + /* destroy iovas */ put_iova_domain(&domain->iovad); - /* clear ptes */ - dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); - - /* free page tables */ - dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); + freelist = domain_unmap(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); + /* clear attached or cached domains */ + rcu_read_lock(); for_each_active_iommu(iommu, drhd) - if (test_bit(iommu->seq_id, domain->iommu_bmp)) + if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE || + test_bit(iommu->seq_id, domain->iommu_bmp)) iommu_detach_domain(domain, iommu); + rcu_read_unlock(); + + dma_free_pagelist(freelist); free_domain_mem(domain); } -static int domain_context_mapping_one(struct dmar_domain *domain, int segment, - u8 bus, u8 devfn, int translation) +static int domain_context_mapping_one(struct dmar_domain *domain, + struct intel_iommu *iommu, + u8 bus, u8 devfn, int translation) { struct context_entry *context; unsigned long flags; - struct intel_iommu *iommu; struct dma_pte *pgd; unsigned long num; unsigned long ndomains; @@ -1562,10 +1736,6 @@ static int domain_context_mapping_one(struct dmar_domain *domain, int segment, BUG_ON(translation != CONTEXT_TT_PASS_THROUGH && translation != CONTEXT_TT_MULTI_LEVEL); - iommu = device_to_iommu(segment, bus, devfn); - if (!iommu) - return -ENODEV; - context = device_to_context_entry(iommu, bus, devfn); if (!context) return -ENOMEM; @@ -1623,7 +1793,7 @@ static int domain_context_mapping_one(struct dmar_domain *domain, int segment, context_set_domain_id(context, id); if (translation != CONTEXT_TT_PASS_THROUGH) { - info = iommu_support_dev_iotlb(domain, segment, bus, devfn); + info = iommu_support_dev_iotlb(domain, iommu, bus, devfn); translation = info ? CONTEXT_TT_DEV_IOTLB : CONTEXT_TT_MULTI_LEVEL; } @@ -1673,27 +1843,32 @@ static int domain_context_mapping_one(struct dmar_domain *domain, int segment, } static int -domain_context_mapping(struct dmar_domain *domain, struct pci_dev *pdev, - int translation) +domain_context_mapping(struct dmar_domain *domain, struct device *dev, + int translation) { int ret; - struct pci_dev *tmp, *parent; + struct pci_dev *pdev, *tmp, *parent; + struct intel_iommu *iommu; + u8 bus, devfn; - ret = domain_context_mapping_one(domain, pci_domain_nr(pdev->bus), - pdev->bus->number, pdev->devfn, + iommu = device_to_iommu(dev, &bus, &devfn); + if (!iommu) + return -ENODEV; + + ret = domain_context_mapping_one(domain, iommu, bus, devfn, translation); - if (ret) + if (ret || !dev_is_pci(dev)) return ret; /* dependent device mapping */ + pdev = to_pci_dev(dev); tmp = pci_find_upstream_pcie_bridge(pdev); if (!tmp) return 0; /* Secondary interface's bus number and devfn 0 */ parent = pdev->bus->self; while (parent != tmp) { - ret = domain_context_mapping_one(domain, - pci_domain_nr(parent->bus), + ret = domain_context_mapping_one(domain, iommu, parent->bus->number, parent->devfn, translation); if (ret) @@ -1701,33 +1876,33 @@ domain_context_mapping(struct dmar_domain *domain, struct pci_dev *pdev, parent = parent->bus->self; } if (pci_is_pcie(tmp)) /* this is a PCIe-to-PCI bridge */ - return domain_context_mapping_one(domain, - pci_domain_nr(tmp->subordinate), + return domain_context_mapping_one(domain, iommu, tmp->subordinate->number, 0, translation); else /* this is a legacy PCI bridge */ - return domain_context_mapping_one(domain, - pci_domain_nr(tmp->bus), + return domain_context_mapping_one(domain, iommu, tmp->bus->number, tmp->devfn, translation); } -static int domain_context_mapped(struct pci_dev *pdev) +static int domain_context_mapped(struct device *dev) { int ret; - struct pci_dev *tmp, *parent; + struct pci_dev *pdev, *tmp, *parent; struct intel_iommu *iommu; + u8 bus, devfn; - iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, - pdev->devfn); + iommu = device_to_iommu(dev, &bus, &devfn); if (!iommu) return -ENODEV; - ret = device_context_mapped(iommu, pdev->bus->number, pdev->devfn); - if (!ret) + ret = device_context_mapped(iommu, bus, devfn); + if (!ret || !dev_is_pci(dev)) return ret; + /* dependent device mapping */ + pdev = to_pci_dev(dev); tmp = pci_find_upstream_pcie_bridge(pdev); if (!tmp) return ret; @@ -1823,7 +1998,7 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn, if (!pte) { largepage_lvl = hardware_largepage_caps(domain, iov_pfn, phys_pfn, sg_res); - first_pte = pte = pfn_to_dma_pte(domain, iov_pfn, largepage_lvl); + first_pte = pte = pfn_to_dma_pte(domain, iov_pfn, &largepage_lvl); if (!pte) return -ENOMEM; /* It is large page*/ @@ -1922,14 +2097,13 @@ static inline void unlink_domain_info(struct device_domain_info *info) list_del(&info->link); list_del(&info->global); if (info->dev) - info->dev->dev.archdata.iommu = NULL; + info->dev->archdata.iommu = NULL; } static void domain_remove_dev_info(struct dmar_domain *domain) { struct device_domain_info *info; - unsigned long flags; - struct intel_iommu *iommu; + unsigned long flags, flags2; spin_lock_irqsave(&device_domain_lock, flags); while (!list_empty(&domain->devices)) { @@ -1939,10 +2113,23 @@ static void domain_remove_dev_info(struct dmar_domain *domain) spin_unlock_irqrestore(&device_domain_lock, flags); iommu_disable_dev_iotlb(info); - iommu = device_to_iommu(info->segment, info->bus, info->devfn); - iommu_detach_dev(iommu, info->bus, info->devfn); - free_devinfo_mem(info); + iommu_detach_dev(info->iommu, info->bus, info->devfn); + if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) { + iommu_detach_dependent_devices(info->iommu, info->dev); + /* clear this iommu in iommu_bmp, update iommu count + * and capabilities + */ + spin_lock_irqsave(&domain->iommu_lock, flags2); + if (test_and_clear_bit(info->iommu->seq_id, + domain->iommu_bmp)) { + domain->iommu_count--; + domain_update_iommu_cap(domain); + } + spin_unlock_irqrestore(&domain->iommu_lock, flags2); + } + + free_devinfo_mem(info); spin_lock_irqsave(&device_domain_lock, flags); } spin_unlock_irqrestore(&device_domain_lock, flags); @@ -1950,155 +2137,153 @@ static void domain_remove_dev_info(struct dmar_domain *domain) /* * find_domain - * Note: we use struct pci_dev->dev.archdata.iommu stores the info + * Note: we use struct device->archdata.iommu stores the info */ -static struct dmar_domain * -find_domain(struct pci_dev *pdev) +static struct dmar_domain *find_domain(struct device *dev) { struct device_domain_info *info; /* No lock here, assumes no domain exit in normal case */ - info = pdev->dev.archdata.iommu; + info = dev->archdata.iommu; if (info) return info->domain; return NULL; } +static inline struct device_domain_info * +dmar_search_domain_by_dev_info(int segment, int bus, int devfn) +{ + struct device_domain_info *info; + + list_for_each_entry(info, &device_domain_list, global) + if (info->iommu->segment == segment && info->bus == bus && + info->devfn == devfn) + return info; + + return NULL; +} + +static struct dmar_domain *dmar_insert_dev_info(struct intel_iommu *iommu, + int bus, int devfn, + struct device *dev, + struct dmar_domain *domain) +{ + struct dmar_domain *found = NULL; + struct device_domain_info *info; + unsigned long flags; + + info = alloc_devinfo_mem(); + if (!info) + return NULL; + + info->bus = bus; + info->devfn = devfn; + info->dev = dev; + info->domain = domain; + info->iommu = iommu; + if (!dev) + domain->flags |= DOMAIN_FLAG_P2P_MULTIPLE_DEVICES; + + spin_lock_irqsave(&device_domain_lock, flags); + if (dev) + found = find_domain(dev); + else { + struct device_domain_info *info2; + info2 = dmar_search_domain_by_dev_info(iommu->segment, bus, devfn); + if (info2) + found = info2->domain; + } + if (found) { + spin_unlock_irqrestore(&device_domain_lock, flags); + free_devinfo_mem(info); + /* Caller must free the original domain */ + return found; + } + + list_add(&info->link, &domain->devices); + list_add(&info->global, &device_domain_list); + if (dev) + dev->archdata.iommu = info; + spin_unlock_irqrestore(&device_domain_lock, flags); + + return domain; +} + /* domain is initialized */ -static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw) +static struct dmar_domain *get_domain_for_dev(struct device *dev, int gaw) { - struct dmar_domain *domain, *found = NULL; - struct intel_iommu *iommu; - struct dmar_drhd_unit *drhd; - struct device_domain_info *info, *tmp; - struct pci_dev *dev_tmp; + struct dmar_domain *domain, *free = NULL; + struct intel_iommu *iommu = NULL; + struct device_domain_info *info; + struct pci_dev *dev_tmp = NULL; unsigned long flags; - int bus = 0, devfn = 0; - int segment; - int ret; + u8 bus, devfn, bridge_bus, bridge_devfn; - domain = find_domain(pdev); + domain = find_domain(dev); if (domain) return domain; - segment = pci_domain_nr(pdev->bus); + if (dev_is_pci(dev)) { + struct pci_dev *pdev = to_pci_dev(dev); + u16 segment; - dev_tmp = pci_find_upstream_pcie_bridge(pdev); - if (dev_tmp) { - if (pci_is_pcie(dev_tmp)) { - bus = dev_tmp->subordinate->number; - devfn = 0; - } else { - bus = dev_tmp->bus->number; - devfn = dev_tmp->devfn; - } - spin_lock_irqsave(&device_domain_lock, flags); - list_for_each_entry(info, &device_domain_list, global) { - if (info->segment == segment && - info->bus == bus && info->devfn == devfn) { - found = info->domain; - break; + segment = pci_domain_nr(pdev->bus); + dev_tmp = pci_find_upstream_pcie_bridge(pdev); + if (dev_tmp) { + if (pci_is_pcie(dev_tmp)) { + bridge_bus = dev_tmp->subordinate->number; + bridge_devfn = 0; + } else { + bridge_bus = dev_tmp->bus->number; + bridge_devfn = dev_tmp->devfn; } - } - spin_unlock_irqrestore(&device_domain_lock, flags); - /* pcie-pci bridge already has a domain, uses it */ - if (found) { - domain = found; - goto found_domain; + spin_lock_irqsave(&device_domain_lock, flags); + info = dmar_search_domain_by_dev_info(segment, + bridge_bus, + bridge_devfn); + if (info) { + iommu = info->iommu; + domain = info->domain; + } + spin_unlock_irqrestore(&device_domain_lock, flags); + /* pcie-pci bridge already has a domain, uses it */ + if (info) + goto found_domain; } } - domain = alloc_domain(); - if (!domain) + iommu = device_to_iommu(dev, &bus, &devfn); + if (!iommu) goto error; - /* Allocate new domain for the device */ - drhd = dmar_find_matched_drhd_unit(pdev); - if (!drhd) { - printk(KERN_ERR "IOMMU: can't find DMAR for device %s\n", - pci_name(pdev)); - free_domain_mem(domain); - return NULL; - } - iommu = drhd->iommu; - - ret = iommu_attach_domain(domain, iommu); - if (ret) { + /* Allocate and initialize new domain for the device */ + domain = alloc_domain(false); + if (!domain) + goto error; + if (iommu_attach_domain(domain, iommu)) { free_domain_mem(domain); + domain = NULL; goto error; } - - if (domain_init(domain, gaw)) { - domain_exit(domain); + free = domain; + if (domain_init(domain, gaw)) goto error; - } /* register pcie-to-pci device */ if (dev_tmp) { - info = alloc_devinfo_mem(); - if (!info) { - domain_exit(domain); + domain = dmar_insert_dev_info(iommu, bridge_bus, bridge_devfn, + NULL, domain); + if (!domain) goto error; - } - info->segment = segment; - info->bus = bus; - info->devfn = devfn; - info->dev = NULL; - info->domain = domain; - /* This domain is shared by devices under p2p bridge */ - domain->flags |= DOMAIN_FLAG_P2P_MULTIPLE_DEVICES; - - /* pcie-to-pci bridge already has a domain, uses it */ - found = NULL; - spin_lock_irqsave(&device_domain_lock, flags); - list_for_each_entry(tmp, &device_domain_list, global) { - if (tmp->segment == segment && - tmp->bus == bus && tmp->devfn == devfn) { - found = tmp->domain; - break; - } - } - if (found) { - spin_unlock_irqrestore(&device_domain_lock, flags); - free_devinfo_mem(info); - domain_exit(domain); - domain = found; - } else { - list_add(&info->link, &domain->devices); - list_add(&info->global, &device_domain_list); - spin_unlock_irqrestore(&device_domain_lock, flags); - } } found_domain: - info = alloc_devinfo_mem(); - if (!info) - goto error; - info->segment = segment; - info->bus = pdev->bus->number; - info->devfn = pdev->devfn; - info->dev = pdev; - info->domain = domain; - spin_lock_irqsave(&device_domain_lock, flags); - /* somebody is fast */ - found = find_domain(pdev); - if (found != NULL) { - spin_unlock_irqrestore(&device_domain_lock, flags); - if (found != domain) { - domain_exit(domain); - domain = found; - } - free_devinfo_mem(info); - return domain; - } - list_add(&info->link, &domain->devices); - list_add(&info->global, &device_domain_list); - pdev->dev.archdata.iommu = info; - spin_unlock_irqrestore(&device_domain_lock, flags); - return domain; + domain = dmar_insert_dev_info(iommu, bus, devfn, dev, domain); error: - /* recheck it here, maybe others set it */ - return find_domain(pdev); + if (free != domain) + domain_exit(free); + + return domain; } static int iommu_identity_mapping; @@ -2132,14 +2317,14 @@ static int iommu_domain_identity_map(struct dmar_domain *domain, DMA_PTE_READ|DMA_PTE_WRITE); } -static int iommu_prepare_identity_map(struct pci_dev *pdev, +static int iommu_prepare_identity_map(struct device *dev, unsigned long long start, unsigned long long end) { struct dmar_domain *domain; int ret; - domain = get_domain_for_dev(pdev, DEFAULT_DOMAIN_ADDRESS_WIDTH); + domain = get_domain_for_dev(dev, DEFAULT_DOMAIN_ADDRESS_WIDTH); if (!domain) return -ENOMEM; @@ -2149,13 +2334,13 @@ static int iommu_prepare_identity_map(struct pci_dev *pdev, up to start with in si_domain */ if (domain == si_domain && hw_pass_through) { printk("Ignoring identity map for HW passthrough device %s [0x%Lx - 0x%Lx]\n", - pci_name(pdev), start, end); + dev_name(dev), start, end); return 0; } printk(KERN_INFO "IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n", - pci_name(pdev), start, end); + dev_name(dev), start, end); if (end < start) { WARN(1, "Your BIOS is broken; RMRR ends before it starts!\n" @@ -2183,7 +2368,7 @@ static int iommu_prepare_identity_map(struct pci_dev *pdev, goto error; /* context entry init */ - ret = domain_context_mapping(domain, pdev, CONTEXT_TT_MULTI_LEVEL); + ret = domain_context_mapping(domain, dev, CONTEXT_TT_MULTI_LEVEL); if (ret) goto error; @@ -2195,12 +2380,12 @@ static int iommu_prepare_identity_map(struct pci_dev *pdev, } static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr, - struct pci_dev *pdev) + struct device *dev) { - if (pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO) + if (dev->archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO) return 0; - return iommu_prepare_identity_map(pdev, rmrr->base_address, - rmrr->end_address); + return iommu_prepare_identity_map(dev, rmrr->base_address, + rmrr->end_address); } #ifdef CONFIG_INTEL_IOMMU_FLOPPY_WA @@ -2214,7 +2399,7 @@ static inline void iommu_prepare_isa(void) return; printk(KERN_INFO "IOMMU: Prepare 0-16MiB unity mapping for LPC\n"); - ret = iommu_prepare_identity_map(pdev, 0, 16*1024*1024 - 1); + ret = iommu_prepare_identity_map(&pdev->dev, 0, 16*1024*1024 - 1); if (ret) printk(KERN_ERR "IOMMU: Failed to create 0-16MiB identity map; " @@ -2236,11 +2421,11 @@ static int __init si_domain_init(int hw) struct intel_iommu *iommu; int nid, ret = 0; - si_domain = alloc_domain(); + si_domain = alloc_domain(false); if (!si_domain) return -EFAULT; - pr_debug("Identity mapping domain is domain %d\n", si_domain->id); + si_domain->flags = DOMAIN_FLAG_STATIC_IDENTITY; for_each_active_iommu(iommu, drhd) { ret = iommu_attach_domain(si_domain, iommu); @@ -2255,7 +2440,8 @@ static int __init si_domain_init(int hw) return -EFAULT; } - si_domain->flags = DOMAIN_FLAG_STATIC_IDENTITY; + pr_debug("IOMMU: identity mapping domain is domain %d\n", + si_domain->id); if (hw) return 0; @@ -2275,16 +2461,14 @@ static int __init si_domain_init(int hw) return 0; } -static void domain_remove_one_dev_info(struct dmar_domain *domain, - struct pci_dev *pdev); -static int identity_mapping(struct pci_dev *pdev) +static int identity_mapping(struct device *dev) { struct device_domain_info *info; if (likely(!iommu_identity_mapping)) return 0; - info = pdev->dev.archdata.iommu; + info = dev->archdata.iommu; if (info && info != DUMMY_DEVICE_DOMAIN_INFO) return (info->domain == si_domain); @@ -2292,111 +2476,112 @@ static int identity_mapping(struct pci_dev *pdev) } static int domain_add_dev_info(struct dmar_domain *domain, - struct pci_dev *pdev, - int translation) + struct device *dev, int translation) { - struct device_domain_info *info; - unsigned long flags; + struct dmar_domain *ndomain; + struct intel_iommu *iommu; + u8 bus, devfn; int ret; - info = alloc_devinfo_mem(); - if (!info) - return -ENOMEM; - - info->segment = pci_domain_nr(pdev->bus); - info->bus = pdev->bus->number; - info->devfn = pdev->devfn; - info->dev = pdev; - info->domain = domain; + iommu = device_to_iommu(dev, &bus, &devfn); + if (!iommu) + return -ENODEV; - spin_lock_irqsave(&device_domain_lock, flags); - list_add(&info->link, &domain->devices); - list_add(&info->global, &device_domain_list); - pdev->dev.archdata.iommu = info; - spin_unlock_irqrestore(&device_domain_lock, flags); + ndomain = dmar_insert_dev_info(iommu, bus, devfn, dev, domain); + if (ndomain != domain) + return -EBUSY; - ret = domain_context_mapping(domain, pdev, translation); + ret = domain_context_mapping(domain, dev, translation); if (ret) { - spin_lock_irqsave(&device_domain_lock, flags); - unlink_domain_info(info); - spin_unlock_irqrestore(&device_domain_lock, flags); - free_devinfo_mem(info); + domain_remove_one_dev_info(domain, dev); return ret; } return 0; } -static bool device_has_rmrr(struct pci_dev *dev) +static bool device_has_rmrr(struct device *dev) { struct dmar_rmrr_unit *rmrr; + struct device *tmp; int i; + rcu_read_lock(); for_each_rmrr_units(rmrr) { - for (i = 0; i < rmrr->devices_cnt; i++) { - /* - * Return TRUE if this RMRR contains the device that - * is passed in. - */ - if (rmrr->devices[i] == dev) + /* + * Return TRUE if this RMRR contains the device that + * is passed in. + */ + for_each_active_dev_scope(rmrr->devices, + rmrr->devices_cnt, i, tmp) + if (tmp == dev) { + rcu_read_unlock(); return true; - } + } } + rcu_read_unlock(); return false; } -static int iommu_should_identity_map(struct pci_dev *pdev, int startup) +static int iommu_should_identity_map(struct device *dev, int startup) { - /* - * We want to prevent any device associated with an RMRR from - * getting placed into the SI Domain. This is done because - * problems exist when devices are moved in and out of domains - * and their respective RMRR info is lost. We exempt USB devices - * from this process due to their usage of RMRRs that are known - * to not be needed after BIOS hand-off to OS. - */ - if (device_has_rmrr(pdev) && - (pdev->class >> 8) != PCI_CLASS_SERIAL_USB) - return 0; + if (dev_is_pci(dev)) { + struct pci_dev *pdev = to_pci_dev(dev); - if ((iommu_identity_mapping & IDENTMAP_AZALIA) && IS_AZALIA(pdev)) - return 1; + /* + * We want to prevent any device associated with an RMRR from + * getting placed into the SI Domain. This is done because + * problems exist when devices are moved in and out of domains + * and their respective RMRR info is lost. We exempt USB devices + * from this process due to their usage of RMRRs that are known + * to not be needed after BIOS hand-off to OS. + */ + if (device_has_rmrr(dev) && + (pdev->class >> 8) != PCI_CLASS_SERIAL_USB) + return 0; - if ((iommu_identity_mapping & IDENTMAP_GFX) && IS_GFX_DEVICE(pdev)) - return 1; + if ((iommu_identity_mapping & IDENTMAP_AZALIA) && IS_AZALIA(pdev)) + return 1; - if (!(iommu_identity_mapping & IDENTMAP_ALL)) - return 0; + if ((iommu_identity_mapping & IDENTMAP_GFX) && IS_GFX_DEVICE(pdev)) + return 1; - /* - * We want to start off with all devices in the 1:1 domain, and - * take them out later if we find they can't access all of memory. - * - * However, we can't do this for PCI devices behind bridges, - * because all PCI devices behind the same bridge will end up - * with the same source-id on their transactions. - * - * Practically speaking, we can't change things around for these - * devices at run-time, because we can't be sure there'll be no - * DMA transactions in flight for any of their siblings. - * - * So PCI devices (unless they're on the root bus) as well as - * their parent PCI-PCI or PCIe-PCI bridges must be left _out_ of - * the 1:1 domain, just in _case_ one of their siblings turns out - * not to be able to map all of memory. - */ - if (!pci_is_pcie(pdev)) { - if (!pci_is_root_bus(pdev->bus)) + if (!(iommu_identity_mapping & IDENTMAP_ALL)) return 0; - if (pdev->class >> 8 == PCI_CLASS_BRIDGE_PCI) + + /* + * We want to start off with all devices in the 1:1 domain, and + * take them out later if we find they can't access all of memory. + * + * However, we can't do this for PCI devices behind bridges, + * because all PCI devices behind the same bridge will end up + * with the same source-id on their transactions. + * + * Practically speaking, we can't change things around for these + * devices at run-time, because we can't be sure there'll be no + * DMA transactions in flight for any of their siblings. + * + * So PCI devices (unless they're on the root bus) as well as + * their parent PCI-PCI or PCIe-PCI bridges must be left _out_ of + * the 1:1 domain, just in _case_ one of their siblings turns out + * not to be able to map all of memory. + */ + if (!pci_is_pcie(pdev)) { + if (!pci_is_root_bus(pdev->bus)) + return 0; + if (pdev->class >> 8 == PCI_CLASS_BRIDGE_PCI) + return 0; + } else if (pci_pcie_type(pdev) == PCI_EXP_TYPE_PCI_BRIDGE) return 0; - } else if (pci_pcie_type(pdev) == PCI_EXP_TYPE_PCI_BRIDGE) - return 0; + } else { + if (device_has_rmrr(dev)) + return 0; + } - /* + /* * At boot time, we don't yet know if devices will be 64-bit capable. - * Assume that they will -- if they turn out not to be, then we can + * Assume that they will — if they turn out not to be, then we can * take them out of the 1:1 domain later. */ if (!startup) { @@ -2404,42 +2589,77 @@ static int iommu_should_identity_map(struct pci_dev *pdev, int startup) * If the device's dma_mask is less than the system's memory * size then this is not a candidate for identity mapping. */ - u64 dma_mask = pdev->dma_mask; + u64 dma_mask = *dev->dma_mask; - if (pdev->dev.coherent_dma_mask && - pdev->dev.coherent_dma_mask < dma_mask) - dma_mask = pdev->dev.coherent_dma_mask; + if (dev->coherent_dma_mask && + dev->coherent_dma_mask < dma_mask) + dma_mask = dev->coherent_dma_mask; - return dma_mask >= dma_get_required_mask(&pdev->dev); + return dma_mask >= dma_get_required_mask(dev); } return 1; } +static int __init dev_prepare_static_identity_mapping(struct device *dev, int hw) +{ + int ret; + + if (!iommu_should_identity_map(dev, 1)) + return 0; + + ret = domain_add_dev_info(si_domain, dev, + hw ? CONTEXT_TT_PASS_THROUGH : + CONTEXT_TT_MULTI_LEVEL); + if (!ret) + pr_info("IOMMU: %s identity mapping for device %s\n", + hw ? "hardware" : "software", dev_name(dev)); + else if (ret == -ENODEV) + /* device not associated with an iommu */ + ret = 0; + + return ret; +} + + static int __init iommu_prepare_static_identity_mapping(int hw) { struct pci_dev *pdev = NULL; - int ret; + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; + struct device *dev; + int i; + int ret = 0; ret = si_domain_init(hw); if (ret) return -EFAULT; for_each_pci_dev(pdev) { - if (iommu_should_identity_map(pdev, 1)) { - ret = domain_add_dev_info(si_domain, pdev, - hw ? CONTEXT_TT_PASS_THROUGH : - CONTEXT_TT_MULTI_LEVEL); - if (ret) { - /* device not associated with an iommu */ - if (ret == -ENODEV) - continue; - return ret; + ret = dev_prepare_static_identity_mapping(&pdev->dev, hw); + if (ret) + return ret; + } + + for_each_active_iommu(iommu, drhd) + for_each_active_dev_scope(drhd->devices, drhd->devices_cnt, i, dev) { + struct acpi_device_physical_node *pn; + struct acpi_device *adev; + + if (dev->bus != &acpi_bus_type) + continue; + + adev= to_acpi_device(dev); + mutex_lock(&adev->physical_node_lock); + list_for_each_entry(pn, &adev->physical_node_list, node) { + ret = dev_prepare_static_identity_mapping(pn->dev, hw); + if (ret) + break; } - pr_info("IOMMU: %s identity mapping for device %s\n", - hw ? "hardware" : "software", pci_name(pdev)); + mutex_unlock(&adev->physical_node_lock); + if (ret) + return ret; } - } return 0; } @@ -2448,7 +2668,7 @@ static int __init init_dmars(void) { struct dmar_drhd_unit *drhd; struct dmar_rmrr_unit *rmrr; - struct pci_dev *pdev; + struct device *dev; struct intel_iommu *iommu; int i, ret; @@ -2484,19 +2704,15 @@ static int __init init_dmars(void) sizeof(struct deferred_flush_tables), GFP_KERNEL); if (!deferred_flush) { ret = -ENOMEM; - goto error; + goto free_g_iommus; } - for_each_drhd_unit(drhd) { - if (drhd->ignored) - continue; - - iommu = drhd->iommu; + for_each_active_iommu(iommu, drhd) { g_iommus[iommu->seq_id] = iommu; ret = iommu_init_domains(iommu); if (ret) - goto error; + goto free_iommu; /* * TBD: @@ -2506,7 +2722,7 @@ static int __init init_dmars(void) ret = iommu_alloc_root_entry(iommu); if (ret) { printk(KERN_ERR "IOMMU: allocate root entry failed\n"); - goto error; + goto free_iommu; } if (!ecap_pass_through(iommu->ecap)) hw_pass_through = 0; @@ -2515,12 +2731,7 @@ static int __init init_dmars(void) /* * Start from the sane iommu hardware state. */ - for_each_drhd_unit(drhd) { - if (drhd->ignored) - continue; - - iommu = drhd->iommu; - + for_each_active_iommu(iommu, drhd) { /* * If the queued invalidation is already initialized by us * (for example, while enabling interrupt-remapping) then @@ -2540,12 +2751,7 @@ static int __init init_dmars(void) dmar_disable_qi(iommu); } - for_each_drhd_unit(drhd) { - if (drhd->ignored) - continue; - - iommu = drhd->iommu; - + for_each_active_iommu(iommu, drhd) { if (dmar_enable_qi(iommu)) { /* * Queued Invalidate not enabled, use Register Based @@ -2585,7 +2791,7 @@ static int __init init_dmars(void) ret = iommu_prepare_static_identity_mapping(hw_pass_through); if (ret) { printk(KERN_CRIT "Failed to setup IOMMU pass-through\n"); - goto error; + goto free_iommu; } } /* @@ -2604,15 +2810,10 @@ static int __init init_dmars(void) */ printk(KERN_INFO "IOMMU: Setting RMRR:\n"); for_each_rmrr_units(rmrr) { - for (i = 0; i < rmrr->devices_cnt; i++) { - pdev = rmrr->devices[i]; - /* - * some BIOS lists non-exist devices in DMAR - * table. - */ - if (!pdev) - continue; - ret = iommu_prepare_rmrr_dev(rmrr, pdev); + /* some BIOS lists non-exist devices in DMAR table. */ + for_each_active_dev_scope(rmrr->devices, rmrr->devices_cnt, + i, dev) { + ret = iommu_prepare_rmrr_dev(rmrr, dev); if (ret) printk(KERN_ERR "IOMMU: mapping reserved region failed\n"); @@ -2628,23 +2829,22 @@ static int __init init_dmars(void) * global invalidate iotlb * enable translation */ - for_each_drhd_unit(drhd) { + for_each_iommu(iommu, drhd) { if (drhd->ignored) { /* * we always have to disable PMRs or DMA may fail on * this device */ if (force_on) - iommu_disable_protect_mem_regions(drhd->iommu); + iommu_disable_protect_mem_regions(iommu); continue; } - iommu = drhd->iommu; iommu_flush_write_buffer(iommu); ret = dmar_set_interrupt(iommu); if (ret) - goto error; + goto free_iommu; iommu_set_root_entry(iommu); @@ -2653,20 +2853,20 @@ static int __init init_dmars(void) ret = iommu_enable_translation(iommu); if (ret) - goto error; + goto free_iommu; iommu_disable_protect_mem_regions(iommu); } return 0; -error: - for_each_drhd_unit(drhd) { - if (drhd->ignored) - continue; - iommu = drhd->iommu; - free_iommu(iommu); - } + +free_iommu: + for_each_active_iommu(iommu, drhd) + free_dmar_iommu(iommu); + kfree(deferred_flush); +free_g_iommus: kfree(g_iommus); +error: return ret; } @@ -2675,7 +2875,6 @@ static struct iova *intel_alloc_iova(struct device *dev, struct dmar_domain *domain, unsigned long nrpages, uint64_t dma_mask) { - struct pci_dev *pdev = to_pci_dev(dev); struct iova *iova = NULL; /* Restrict dma_mask to the width that the iommu can handle */ @@ -2695,34 +2894,31 @@ static struct iova *intel_alloc_iova(struct device *dev, iova = alloc_iova(&domain->iovad, nrpages, IOVA_PFN(dma_mask), 1); if (unlikely(!iova)) { printk(KERN_ERR "Allocating %ld-page iova for %s failed", - nrpages, pci_name(pdev)); + nrpages, dev_name(dev)); return NULL; } return iova; } -static struct dmar_domain *__get_valid_domain_for_dev(struct pci_dev *pdev) +static struct dmar_domain *__get_valid_domain_for_dev(struct device *dev) { struct dmar_domain *domain; int ret; - domain = get_domain_for_dev(pdev, - DEFAULT_DOMAIN_ADDRESS_WIDTH); + domain = get_domain_for_dev(dev, DEFAULT_DOMAIN_ADDRESS_WIDTH); if (!domain) { - printk(KERN_ERR - "Allocating domain for %s failed", pci_name(pdev)); + printk(KERN_ERR "Allocating domain for %s failed", + dev_name(dev)); return NULL; } /* make sure context mapping is ok */ - if (unlikely(!domain_context_mapped(pdev))) { - ret = domain_context_mapping(domain, pdev, - CONTEXT_TT_MULTI_LEVEL); + if (unlikely(!domain_context_mapped(dev))) { + ret = domain_context_mapping(domain, dev, CONTEXT_TT_MULTI_LEVEL); if (ret) { - printk(KERN_ERR - "Domain context map for %s failed", - pci_name(pdev)); + printk(KERN_ERR "Domain context map for %s failed", + dev_name(dev)); return NULL; } } @@ -2730,51 +2926,46 @@ static struct dmar_domain *__get_valid_domain_for_dev(struct pci_dev *pdev) return domain; } -static inline struct dmar_domain *get_valid_domain_for_dev(struct pci_dev *dev) +static inline struct dmar_domain *get_valid_domain_for_dev(struct device *dev) { struct device_domain_info *info; /* No lock here, assumes no domain exit in normal case */ - info = dev->dev.archdata.iommu; + info = dev->archdata.iommu; if (likely(info)) return info->domain; return __get_valid_domain_for_dev(dev); } -static int iommu_dummy(struct pci_dev *pdev) +static int iommu_dummy(struct device *dev) { - return pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO; + return dev->archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO; } -/* Check if the pdev needs to go through non-identity map and unmap process.*/ +/* Check if the dev needs to go through non-identity map and unmap process.*/ static int iommu_no_mapping(struct device *dev) { - struct pci_dev *pdev; int found; - if (unlikely(dev->bus != &pci_bus_type)) - return 1; - - pdev = to_pci_dev(dev); - if (iommu_dummy(pdev)) + if (iommu_dummy(dev)) return 1; if (!iommu_identity_mapping) return 0; - found = identity_mapping(pdev); + found = identity_mapping(dev); if (found) { - if (iommu_should_identity_map(pdev, 0)) + if (iommu_should_identity_map(dev, 0)) return 1; else { /* * 32 bit DMA is removed from si_domain and fall back * to non-identity mapping. */ - domain_remove_one_dev_info(si_domain, pdev); + domain_remove_one_dev_info(si_domain, dev); printk(KERN_INFO "32bit %s uses non-identity mapping\n", - pci_name(pdev)); + dev_name(dev)); return 0; } } else { @@ -2782,15 +2973,15 @@ static int iommu_no_mapping(struct device *dev) * In case of a detached 64 bit DMA device from vm, the device * is put into si_domain for identity mapping. */ - if (iommu_should_identity_map(pdev, 0)) { + if (iommu_should_identity_map(dev, 0)) { int ret; - ret = domain_add_dev_info(si_domain, pdev, + ret = domain_add_dev_info(si_domain, dev, hw_pass_through ? CONTEXT_TT_PASS_THROUGH : CONTEXT_TT_MULTI_LEVEL); if (!ret) { printk(KERN_INFO "64bit %s uses identity mapping\n", - pci_name(pdev)); + dev_name(dev)); return 1; } } @@ -2799,10 +2990,9 @@ static int iommu_no_mapping(struct device *dev) return 0; } -static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr, +static dma_addr_t __intel_map_single(struct device *dev, phys_addr_t paddr, size_t size, int dir, u64 dma_mask) { - struct pci_dev *pdev = to_pci_dev(hwdev); struct dmar_domain *domain; phys_addr_t start_paddr; struct iova *iova; @@ -2813,17 +3003,17 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr, BUG_ON(dir == DMA_NONE); - if (iommu_no_mapping(hwdev)) + if (iommu_no_mapping(dev)) return paddr; - domain = get_valid_domain_for_dev(pdev); + domain = get_valid_domain_for_dev(dev); if (!domain) return 0; iommu = domain_get_iommu(domain); size = aligned_nrpages(paddr, size); - iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size), dma_mask); + iova = intel_alloc_iova(dev, domain, dma_to_mm_pfn(size), dma_mask); if (!iova) goto error; @@ -2849,7 +3039,7 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr, /* it's a non-present to present mapping. Only flush if caching mode */ if (cap_caching_mode(iommu->cap)) - iommu_flush_iotlb_psi(iommu, domain->id, mm_to_dma_pfn(iova->pfn_lo), size, 1); + iommu_flush_iotlb_psi(iommu, domain->id, mm_to_dma_pfn(iova->pfn_lo), size, 0, 1); else iommu_flush_write_buffer(iommu); @@ -2861,7 +3051,7 @@ error: if (iova) __free_iova(&domain->iovad, iova); printk(KERN_ERR"Device %s request: %zx@%llx dir %d --- failed\n", - pci_name(pdev), size, (unsigned long long)paddr, dir); + dev_name(dev), size, (unsigned long long)paddr, dir); return 0; } @@ -2871,7 +3061,7 @@ static dma_addr_t intel_map_page(struct device *dev, struct page *page, struct dma_attrs *attrs) { return __intel_map_single(dev, page_to_phys(page) + offset, size, - dir, to_pci_dev(dev)->dma_mask); + dir, *dev->dma_mask); } static void flush_unmaps(void) @@ -2901,13 +3091,16 @@ static void flush_unmaps(void) /* On real hardware multiple invalidations are expensive */ if (cap_caching_mode(iommu->cap)) iommu_flush_iotlb_psi(iommu, domain->id, - iova->pfn_lo, iova->pfn_hi - iova->pfn_lo + 1, 0); + iova->pfn_lo, iova->pfn_hi - iova->pfn_lo + 1, + !deferred_flush[i].freelist[j], 0); else { mask = ilog2(mm_to_dma_pfn(iova->pfn_hi - iova->pfn_lo + 1)); iommu_flush_dev_iotlb(deferred_flush[i].domain[j], (uint64_t)iova->pfn_lo << PAGE_SHIFT, mask); } __free_iova(&deferred_flush[i].domain[j]->iovad, iova); + if (deferred_flush[i].freelist[j]) + dma_free_pagelist(deferred_flush[i].freelist[j]); } deferred_flush[i].next = 0; } @@ -2924,7 +3117,7 @@ static void flush_unmaps_timeout(unsigned long data) spin_unlock_irqrestore(&async_umap_flush_lock, flags); } -static void add_unmap(struct dmar_domain *dom, struct iova *iova) +static void add_unmap(struct dmar_domain *dom, struct iova *iova, struct page *freelist) { unsigned long flags; int next, iommu_id; @@ -2940,6 +3133,7 @@ static void add_unmap(struct dmar_domain *dom, struct iova *iova) next = deferred_flush[iommu_id].next; deferred_flush[iommu_id].domain[next] = dom; deferred_flush[iommu_id].iova[next] = iova; + deferred_flush[iommu_id].freelist[next] = freelist; deferred_flush[iommu_id].next++; if (!timer_on) { @@ -2954,16 +3148,16 @@ static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) { - struct pci_dev *pdev = to_pci_dev(dev); struct dmar_domain *domain; unsigned long start_pfn, last_pfn; struct iova *iova; struct intel_iommu *iommu; + struct page *freelist; if (iommu_no_mapping(dev)) return; - domain = find_domain(pdev); + domain = find_domain(dev); BUG_ON(!domain); iommu = domain_get_iommu(domain); @@ -2977,21 +3171,18 @@ static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr, last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1; pr_debug("Device %s unmapping: pfn %lx-%lx\n", - pci_name(pdev), start_pfn, last_pfn); + dev_name(dev), start_pfn, last_pfn); - /* clear the whole page */ - dma_pte_clear_range(domain, start_pfn, last_pfn); - - /* free page tables */ - dma_pte_free_pagetable(domain, start_pfn, last_pfn); + freelist = domain_unmap(domain, start_pfn, last_pfn); if (intel_iommu_strict) { iommu_flush_iotlb_psi(iommu, domain->id, start_pfn, - last_pfn - start_pfn + 1, 0); + last_pfn - start_pfn + 1, !freelist, 0); /* free iova */ __free_iova(&domain->iovad, iova); + dma_free_pagelist(freelist); } else { - add_unmap(domain, iova); + add_unmap(domain, iova, freelist); /* * queue up the release of the unmap to save the 1/6th of the * cpu used up by the iotlb flush operation... @@ -2999,65 +3190,81 @@ static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr, } } -static void *intel_alloc_coherent(struct device *hwdev, size_t size, +static void *intel_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flags, struct dma_attrs *attrs) { - void *vaddr; + struct page *page = NULL; int order; size = PAGE_ALIGN(size); order = get_order(size); - if (!iommu_no_mapping(hwdev)) + if (!iommu_no_mapping(dev)) flags &= ~(GFP_DMA | GFP_DMA32); - else if (hwdev->coherent_dma_mask < dma_get_required_mask(hwdev)) { - if (hwdev->coherent_dma_mask < DMA_BIT_MASK(32)) + else if (dev->coherent_dma_mask < dma_get_required_mask(dev)) { + if (dev->coherent_dma_mask < DMA_BIT_MASK(32)) flags |= GFP_DMA; else flags |= GFP_DMA32; } - vaddr = (void *)__get_free_pages(flags, order); - if (!vaddr) + if (flags & __GFP_WAIT) { + unsigned int count = size >> PAGE_SHIFT; + + page = dma_alloc_from_contiguous(dev, count, order); + if (page && iommu_no_mapping(dev) && + page_to_phys(page) + size > dev->coherent_dma_mask) { + dma_release_from_contiguous(dev, page, count); + page = NULL; + } + } + + if (!page) + page = alloc_pages(flags, order); + if (!page) return NULL; - memset(vaddr, 0, size); + memset(page_address(page), 0, size); - *dma_handle = __intel_map_single(hwdev, virt_to_bus(vaddr), size, + *dma_handle = __intel_map_single(dev, page_to_phys(page), size, DMA_BIDIRECTIONAL, - hwdev->coherent_dma_mask); + dev->coherent_dma_mask); if (*dma_handle) - return vaddr; - free_pages((unsigned long)vaddr, order); + return page_address(page); + if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) + __free_pages(page, order); + return NULL; } -static void intel_free_coherent(struct device *hwdev, size_t size, void *vaddr, +static void intel_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle, struct dma_attrs *attrs) { int order; + struct page *page = virt_to_page(vaddr); size = PAGE_ALIGN(size); order = get_order(size); - intel_unmap_page(hwdev, dma_handle, size, DMA_BIDIRECTIONAL, NULL); - free_pages((unsigned long)vaddr, order); + intel_unmap_page(dev, dma_handle, size, DMA_BIDIRECTIONAL, NULL); + if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) + __free_pages(page, order); } -static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist, +static void intel_unmap_sg(struct device *dev, struct scatterlist *sglist, int nelems, enum dma_data_direction dir, struct dma_attrs *attrs) { - struct pci_dev *pdev = to_pci_dev(hwdev); struct dmar_domain *domain; unsigned long start_pfn, last_pfn; struct iova *iova; struct intel_iommu *iommu; + struct page *freelist; - if (iommu_no_mapping(hwdev)) + if (iommu_no_mapping(dev)) return; - domain = find_domain(pdev); + domain = find_domain(dev); BUG_ON(!domain); iommu = domain_get_iommu(domain); @@ -3070,19 +3277,16 @@ static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist, start_pfn = mm_to_dma_pfn(iova->pfn_lo); last_pfn = mm_to_dma_pfn(iova->pfn_hi + 1) - 1; - /* clear the whole page */ - dma_pte_clear_range(domain, start_pfn, last_pfn); - - /* free page tables */ - dma_pte_free_pagetable(domain, start_pfn, last_pfn); + freelist = domain_unmap(domain, start_pfn, last_pfn); if (intel_iommu_strict) { iommu_flush_iotlb_psi(iommu, domain->id, start_pfn, - last_pfn - start_pfn + 1, 0); + last_pfn - start_pfn + 1, !freelist, 0); /* free iova */ __free_iova(&domain->iovad, iova); + dma_free_pagelist(freelist); } else { - add_unmap(domain, iova); + add_unmap(domain, iova, freelist); /* * queue up the release of the unmap to save the 1/6th of the * cpu used up by the iotlb flush operation... @@ -3104,11 +3308,10 @@ static int intel_nontranslate_map_sg(struct device *hddev, return nelems; } -static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int nelems, +static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nelems, enum dma_data_direction dir, struct dma_attrs *attrs) { int i; - struct pci_dev *pdev = to_pci_dev(hwdev); struct dmar_domain *domain; size_t size = 0; int prot = 0; @@ -3119,10 +3322,10 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int ne struct intel_iommu *iommu; BUG_ON(dir == DMA_NONE); - if (iommu_no_mapping(hwdev)) - return intel_nontranslate_map_sg(hwdev, sglist, nelems, dir); + if (iommu_no_mapping(dev)) + return intel_nontranslate_map_sg(dev, sglist, nelems, dir); - domain = get_valid_domain_for_dev(pdev); + domain = get_valid_domain_for_dev(dev); if (!domain) return 0; @@ -3131,8 +3334,8 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int ne for_each_sg(sglist, sg, nelems, i) size += aligned_nrpages(sg->offset, sg->length); - iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size), - pdev->dma_mask); + iova = intel_alloc_iova(dev, domain, dma_to_mm_pfn(size), + *dev->dma_mask); if (!iova) { sglist->dma_length = 0; return 0; @@ -3165,7 +3368,7 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int ne /* it's a non-present to present mapping. Only flush if caching mode */ if (cap_caching_mode(iommu->cap)) - iommu_flush_iotlb_psi(iommu, domain->id, start_vpfn, size, 1); + iommu_flush_iotlb_psi(iommu, domain->id, start_vpfn, size, 0, 1); else iommu_flush_write_buffer(iommu); @@ -3300,29 +3503,28 @@ DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quir static void __init init_no_remapping_devices(void) { struct dmar_drhd_unit *drhd; + struct device *dev; + int i; for_each_drhd_unit(drhd) { if (!drhd->include_all) { - int i; - for (i = 0; i < drhd->devices_cnt; i++) - if (drhd->devices[i] != NULL) - break; - /* ignore DMAR unit if no pci devices exist */ + for_each_active_dev_scope(drhd->devices, + drhd->devices_cnt, i, dev) + break; + /* ignore DMAR unit if no devices exist */ if (i == drhd->devices_cnt) drhd->ignored = 1; } } - for_each_drhd_unit(drhd) { - int i; - if (drhd->ignored || drhd->include_all) + for_each_active_drhd_unit(drhd) { + if (drhd->include_all) continue; - for (i = 0; i < drhd->devices_cnt; i++) - if (drhd->devices[i] && - !IS_GFX_DEVICE(drhd->devices[i])) + for_each_active_dev_scope(drhd->devices, + drhd->devices_cnt, i, dev) + if (!dev_is_pci(dev) || !IS_GFX_DEVICE(to_pci_dev(dev))) break; - if (i < drhd->devices_cnt) continue; @@ -3332,11 +3534,9 @@ static void __init init_no_remapping_devices(void) intel_iommu_gfx_mapped = 1; } else { drhd->ignored = 1; - for (i = 0; i < drhd->devices_cnt; i++) { - if (!drhd->devices[i]) - continue; - drhd->devices[i]->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; - } + for_each_active_dev_scope(drhd->devices, + drhd->devices_cnt, i, dev) + dev->archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; } } } @@ -3479,13 +3679,6 @@ static void __init init_iommu_pm_ops(void) static inline void init_iommu_pm_ops(void) {} #endif /* CONFIG_PM */ -LIST_HEAD(dmar_rmrr_units); - -static void __init dmar_register_rmrr_unit(struct dmar_rmrr_unit *rmrr) -{ - list_add(&rmrr->list, &dmar_rmrr_units); -} - int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header) { @@ -3500,30 +3693,18 @@ int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header) rmrr = (struct acpi_dmar_reserved_memory *)header; rmrru->base_address = rmrr->base_address; rmrru->end_address = rmrr->end_address; - - dmar_register_rmrr_unit(rmrru); - return 0; -} - -static int __init -rmrr_parse_dev(struct dmar_rmrr_unit *rmrru) -{ - struct acpi_dmar_reserved_memory *rmrr; - int ret; - - rmrr = (struct acpi_dmar_reserved_memory *) rmrru->hdr; - ret = dmar_parse_dev_scope((void *)(rmrr + 1), - ((void *)rmrr) + rmrr->header.length, - &rmrru->devices_cnt, &rmrru->devices, rmrr->segment); - - if (ret || (rmrru->devices_cnt == 0)) { - list_del(&rmrru->list); + rmrru->devices = dmar_alloc_dev_scope((void *)(rmrr + 1), + ((void *)rmrr) + rmrr->header.length, + &rmrru->devices_cnt); + if (rmrru->devices_cnt && rmrru->devices == NULL) { kfree(rmrru); + return -ENOMEM; } - return ret; -} -static LIST_HEAD(dmar_atsr_units); + list_add(&rmrru->list, &dmar_rmrr_units); + + return 0; +} int __init dmar_parse_one_atsr(struct acpi_dmar_header *hdr) { @@ -3537,91 +3718,134 @@ int __init dmar_parse_one_atsr(struct acpi_dmar_header *hdr) atsru->hdr = hdr; atsru->include_all = atsr->flags & 0x1; + if (!atsru->include_all) { + atsru->devices = dmar_alloc_dev_scope((void *)(atsr + 1), + (void *)atsr + atsr->header.length, + &atsru->devices_cnt); + if (atsru->devices_cnt && atsru->devices == NULL) { + kfree(atsru); + return -ENOMEM; + } + } - list_add(&atsru->list, &dmar_atsr_units); + list_add_rcu(&atsru->list, &dmar_atsr_units); return 0; } -static int __init atsr_parse_dev(struct dmar_atsr_unit *atsru) +static void intel_iommu_free_atsr(struct dmar_atsr_unit *atsru) { - int rc; - struct acpi_dmar_atsr *atsr; + dmar_free_dev_scope(&atsru->devices, &atsru->devices_cnt); + kfree(atsru); +} - if (atsru->include_all) - return 0; +static void intel_iommu_free_dmars(void) +{ + struct dmar_rmrr_unit *rmrru, *rmrr_n; + struct dmar_atsr_unit *atsru, *atsr_n; - atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); - rc = dmar_parse_dev_scope((void *)(atsr + 1), - (void *)atsr + atsr->header.length, - &atsru->devices_cnt, &atsru->devices, - atsr->segment); - if (rc || !atsru->devices_cnt) { - list_del(&atsru->list); - kfree(atsru); + list_for_each_entry_safe(rmrru, rmrr_n, &dmar_rmrr_units, list) { + list_del(&rmrru->list); + dmar_free_dev_scope(&rmrru->devices, &rmrru->devices_cnt); + kfree(rmrru); } - return rc; + list_for_each_entry_safe(atsru, atsr_n, &dmar_atsr_units, list) { + list_del(&atsru->list); + intel_iommu_free_atsr(atsru); + } } int dmar_find_matched_atsr_unit(struct pci_dev *dev) { - int i; + int i, ret = 1; struct pci_bus *bus; + struct pci_dev *bridge = NULL; + struct device *tmp; struct acpi_dmar_atsr *atsr; struct dmar_atsr_unit *atsru; dev = pci_physfn(dev); - - list_for_each_entry(atsru, &dmar_atsr_units, list) { - atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); - if (atsr->segment == pci_domain_nr(dev->bus)) - goto found; - } - - return 0; - -found: for (bus = dev->bus; bus; bus = bus->parent) { - struct pci_dev *bridge = bus->self; - + bridge = bus->self; if (!bridge || !pci_is_pcie(bridge) || pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) return 0; - - if (pci_pcie_type(bridge) == PCI_EXP_TYPE_ROOT_PORT) { - for (i = 0; i < atsru->devices_cnt; i++) - if (atsru->devices[i] == bridge) - return 1; + if (pci_pcie_type(bridge) == PCI_EXP_TYPE_ROOT_PORT) break; - } } + if (!bridge) + return 0; - if (atsru->include_all) - return 1; + rcu_read_lock(); + list_for_each_entry_rcu(atsru, &dmar_atsr_units, list) { + atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); + if (atsr->segment != pci_domain_nr(dev->bus)) + continue; - return 0; + for_each_dev_scope(atsru->devices, atsru->devices_cnt, i, tmp) + if (tmp == &bridge->dev) + goto out; + + if (atsru->include_all) + goto out; + } + ret = 0; +out: + rcu_read_unlock(); + + return ret; } -int __init dmar_parse_rmrr_atsr_dev(void) +int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) { - struct dmar_rmrr_unit *rmrr, *rmrr_n; - struct dmar_atsr_unit *atsr, *atsr_n; int ret = 0; + struct dmar_rmrr_unit *rmrru; + struct dmar_atsr_unit *atsru; + struct acpi_dmar_atsr *atsr; + struct acpi_dmar_reserved_memory *rmrr; - list_for_each_entry_safe(rmrr, rmrr_n, &dmar_rmrr_units, list) { - ret = rmrr_parse_dev(rmrr); - if (ret) - return ret; + if (!intel_iommu_enabled && system_state != SYSTEM_BOOTING) + return 0; + + list_for_each_entry(rmrru, &dmar_rmrr_units, list) { + rmrr = container_of(rmrru->hdr, + struct acpi_dmar_reserved_memory, header); + if (info->event == BUS_NOTIFY_ADD_DEVICE) { + ret = dmar_insert_dev_scope(info, (void *)(rmrr + 1), + ((void *)rmrr) + rmrr->header.length, + rmrr->segment, rmrru->devices, + rmrru->devices_cnt); + if(ret < 0) + return ret; + } else if (info->event == BUS_NOTIFY_DEL_DEVICE) { + dmar_remove_dev_scope(info, rmrr->segment, + rmrru->devices, rmrru->devices_cnt); + } } - list_for_each_entry_safe(atsr, atsr_n, &dmar_atsr_units, list) { - ret = atsr_parse_dev(atsr); - if (ret) - return ret; + list_for_each_entry(atsru, &dmar_atsr_units, list) { + if (atsru->include_all) + continue; + + atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); + if (info->event == BUS_NOTIFY_ADD_DEVICE) { + ret = dmar_insert_dev_scope(info, (void *)(atsr + 1), + (void *)atsr + atsr->header.length, + atsr->segment, atsru->devices, + atsru->devices_cnt); + if (ret > 0) + break; + else if(ret < 0) + return ret; + } else if (info->event == BUS_NOTIFY_DEL_DEVICE) { + if (dmar_remove_dev_scope(info, atsr->segment, + atsru->devices, atsru->devices_cnt)) + break; + } } - return ret; + return 0; } /* @@ -3634,24 +3858,26 @@ static int device_notifier(struct notifier_block *nb, unsigned long action, void *data) { struct device *dev = data; - struct pci_dev *pdev = to_pci_dev(dev); struct dmar_domain *domain; - if (iommu_no_mapping(dev)) + if (iommu_dummy(dev)) return 0; - domain = find_domain(pdev); - if (!domain) + if (action != BUS_NOTIFY_UNBOUND_DRIVER && + action != BUS_NOTIFY_DEL_DEVICE) return 0; - if (action == BUS_NOTIFY_UNBOUND_DRIVER && !iommu_pass_through) { - domain_remove_one_dev_info(domain, pdev); + domain = find_domain(dev); + if (!domain) + return 0; - if (!(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) && - !(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) && - list_empty(&domain->devices)) - domain_exit(domain); - } + down_read(&dmar_global_lock); + domain_remove_one_dev_info(domain, dev); + if (!(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) && + !(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) && + list_empty(&domain->devices)) + domain_exit(domain); + up_read(&dmar_global_lock); return 0; } @@ -3660,33 +3886,112 @@ static struct notifier_block device_nb = { .notifier_call = device_notifier, }; +static int intel_iommu_memory_notifier(struct notifier_block *nb, + unsigned long val, void *v) +{ + struct memory_notify *mhp = v; + unsigned long long start, end; + unsigned long start_vpfn, last_vpfn; + + switch (val) { + case MEM_GOING_ONLINE: + start = mhp->start_pfn << PAGE_SHIFT; + end = ((mhp->start_pfn + mhp->nr_pages) << PAGE_SHIFT) - 1; + if (iommu_domain_identity_map(si_domain, start, end)) { + pr_warn("dmar: failed to build identity map for [%llx-%llx]\n", + start, end); + return NOTIFY_BAD; + } + break; + + case MEM_OFFLINE: + case MEM_CANCEL_ONLINE: + start_vpfn = mm_to_dma_pfn(mhp->start_pfn); + last_vpfn = mm_to_dma_pfn(mhp->start_pfn + mhp->nr_pages - 1); + while (start_vpfn <= last_vpfn) { + struct iova *iova; + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; + struct page *freelist; + + iova = find_iova(&si_domain->iovad, start_vpfn); + if (iova == NULL) { + pr_debug("dmar: failed get IOVA for PFN %lx\n", + start_vpfn); + break; + } + + iova = split_and_remove_iova(&si_domain->iovad, iova, + start_vpfn, last_vpfn); + if (iova == NULL) { + pr_warn("dmar: failed to split IOVA PFN [%lx-%lx]\n", + start_vpfn, last_vpfn); + return NOTIFY_BAD; + } + + freelist = domain_unmap(si_domain, iova->pfn_lo, + iova->pfn_hi); + + rcu_read_lock(); + for_each_active_iommu(iommu, drhd) + iommu_flush_iotlb_psi(iommu, si_domain->id, + iova->pfn_lo, + iova->pfn_hi - iova->pfn_lo + 1, + !freelist, 0); + rcu_read_unlock(); + dma_free_pagelist(freelist); + + start_vpfn = iova->pfn_hi + 1; + free_iova_mem(iova); + } + break; + } + + return NOTIFY_OK; +} + +static struct notifier_block intel_iommu_memory_nb = { + .notifier_call = intel_iommu_memory_notifier, + .priority = 0 +}; + int __init intel_iommu_init(void) { - int ret = 0; + int ret = -ENODEV; + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; /* VT-d is required for a TXT/tboot launch, so enforce that */ force_on = tboot_force_iommu(); + if (iommu_init_mempool()) { + if (force_on) + panic("tboot: Failed to initialize iommu memory\n"); + return -ENOMEM; + } + + down_write(&dmar_global_lock); if (dmar_table_init()) { if (force_on) panic("tboot: Failed to initialize DMAR table\n"); - return -ENODEV; + goto out_free_dmar; } + /* + * Disable translation if already enabled prior to OS handover. + */ + for_each_active_iommu(iommu, drhd) + if (iommu->gcmd & DMA_GCMD_TE) + iommu_disable_translation(iommu); + if (dmar_dev_scope_init() < 0) { if (force_on) panic("tboot: Failed to initialize DMAR device scope\n"); - return -ENODEV; + goto out_free_dmar; } if (no_iommu || dmar_disabled) - return -ENODEV; - - if (iommu_init_mempool()) { - if (force_on) - panic("tboot: Failed to initialize iommu memory\n"); - return -ENODEV; - } + goto out_free_dmar; if (list_empty(&dmar_rmrr_units)) printk(KERN_INFO "DMAR: No RMRR found\n"); @@ -3697,7 +4002,7 @@ int __init intel_iommu_init(void) if (dmar_init_reserved_ranges()) { if (force_on) panic("tboot: Failed to reserve iommu ranges\n"); - return -ENODEV; + goto out_free_reserved_range; } init_no_remapping_devices(); @@ -3707,10 +4012,9 @@ int __init intel_iommu_init(void) if (force_on) panic("tboot: Failed to initialize DMARs\n"); printk(KERN_ERR "IOMMU: dmar init failed\n"); - put_iova_domain(&reserved_iova_list); - iommu_exit_mempool(); - return ret; + goto out_free_reserved_range; } + up_write(&dmar_global_lock); printk(KERN_INFO "PCI-DMA: Intel(R) Virtualization Technology for Directed I/O\n"); @@ -3723,22 +4027,33 @@ int __init intel_iommu_init(void) init_iommu_pm_ops(); bus_set_iommu(&pci_bus_type, &intel_iommu_ops); - bus_register_notifier(&pci_bus_type, &device_nb); + if (si_domain && !hw_pass_through) + register_memory_notifier(&intel_iommu_memory_nb); intel_iommu_enabled = 1; return 0; + +out_free_reserved_range: + put_iova_domain(&reserved_iova_list); +out_free_dmar: + intel_iommu_free_dmars(); + up_write(&dmar_global_lock); + iommu_exit_mempool(); + return ret; } static void iommu_detach_dependent_devices(struct intel_iommu *iommu, - struct pci_dev *pdev) + struct device *dev) { - struct pci_dev *tmp, *parent; + struct pci_dev *tmp, *parent, *pdev; - if (!iommu || !pdev) + if (!iommu || !dev || !dev_is_pci(dev)) return; + pdev = to_pci_dev(dev); + /* dependent device detach */ tmp = pci_find_upstream_pcie_bridge(pdev); /* Secondary interface's bus number and devfn 0 */ @@ -3759,31 +4074,28 @@ static void iommu_detach_dependent_devices(struct intel_iommu *iommu, } static void domain_remove_one_dev_info(struct dmar_domain *domain, - struct pci_dev *pdev) + struct device *dev) { - struct device_domain_info *info; + struct device_domain_info *info, *tmp; struct intel_iommu *iommu; unsigned long flags; int found = 0; - struct list_head *entry, *tmp; + u8 bus, devfn; - iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, - pdev->devfn); + iommu = device_to_iommu(dev, &bus, &devfn); if (!iommu) return; spin_lock_irqsave(&device_domain_lock, flags); - list_for_each_safe(entry, tmp, &domain->devices) { - info = list_entry(entry, struct device_domain_info, link); - if (info->segment == pci_domain_nr(pdev->bus) && - info->bus == pdev->bus->number && - info->devfn == pdev->devfn) { + list_for_each_entry_safe(info, tmp, &domain->devices, link) { + if (info->iommu == iommu && info->bus == bus && + info->devfn == devfn) { unlink_domain_info(info); spin_unlock_irqrestore(&device_domain_lock, flags); iommu_disable_dev_iotlb(info); iommu_detach_dev(iommu, info->bus, info->devfn); - iommu_detach_dependent_devices(iommu, pdev); + iommu_detach_dependent_devices(iommu, dev); free_devinfo_mem(info); spin_lock_irqsave(&device_domain_lock, flags); @@ -3798,8 +4110,7 @@ static void domain_remove_one_dev_info(struct dmar_domain *domain, * owned by this domain, clear this iommu in iommu_bmp * update iommu count and coherency */ - if (iommu == device_to_iommu(info->segment, info->bus, - info->devfn)) + if (info->iommu == iommu) found = 1; } @@ -3823,67 +4134,11 @@ static void domain_remove_one_dev_info(struct dmar_domain *domain, } } -static void vm_domain_remove_all_dev_info(struct dmar_domain *domain) -{ - struct device_domain_info *info; - struct intel_iommu *iommu; - unsigned long flags1, flags2; - - spin_lock_irqsave(&device_domain_lock, flags1); - while (!list_empty(&domain->devices)) { - info = list_entry(domain->devices.next, - struct device_domain_info, link); - unlink_domain_info(info); - spin_unlock_irqrestore(&device_domain_lock, flags1); - - iommu_disable_dev_iotlb(info); - iommu = device_to_iommu(info->segment, info->bus, info->devfn); - iommu_detach_dev(iommu, info->bus, info->devfn); - iommu_detach_dependent_devices(iommu, info->dev); - - /* clear this iommu in iommu_bmp, update iommu count - * and capabilities - */ - spin_lock_irqsave(&domain->iommu_lock, flags2); - if (test_and_clear_bit(iommu->seq_id, - domain->iommu_bmp)) { - domain->iommu_count--; - domain_update_iommu_cap(domain); - } - spin_unlock_irqrestore(&domain->iommu_lock, flags2); - - free_devinfo_mem(info); - spin_lock_irqsave(&device_domain_lock, flags1); - } - spin_unlock_irqrestore(&device_domain_lock, flags1); -} - -/* domain id for virtual machine, it won't be set in context */ -static unsigned long vm_domid; - -static struct dmar_domain *iommu_alloc_vm_domain(void) -{ - struct dmar_domain *domain; - - domain = alloc_domain_mem(); - if (!domain) - return NULL; - - domain->id = vm_domid++; - domain->nid = -1; - memset(domain->iommu_bmp, 0, sizeof(domain->iommu_bmp)); - domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE; - - return domain; -} - static int md_domain_init(struct dmar_domain *domain, int guest_width) { int adjust_width; init_iova_domain(&domain->iovad, DMA_32BIT_PFN); - spin_lock_init(&domain->iommu_lock); - domain_reserve_special_ranges(domain); /* calculate AGAW */ @@ -3891,9 +4146,6 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width) adjust_width = guestwidth_to_adjustwidth(guest_width); domain->agaw = width_to_agaw(adjust_width); - INIT_LIST_HEAD(&domain->devices); - - domain->iommu_count = 0; domain->iommu_coherency = 0; domain->iommu_snooping = 0; domain->iommu_superpage = 0; @@ -3908,57 +4160,11 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width) return 0; } -static void iommu_free_vm_domain(struct dmar_domain *domain) -{ - unsigned long flags; - struct dmar_drhd_unit *drhd; - struct intel_iommu *iommu; - unsigned long i; - unsigned long ndomains; - - for_each_drhd_unit(drhd) { - if (drhd->ignored) - continue; - iommu = drhd->iommu; - - ndomains = cap_ndoms(iommu->cap); - for_each_set_bit(i, iommu->domain_ids, ndomains) { - if (iommu->domains[i] == domain) { - spin_lock_irqsave(&iommu->lock, flags); - clear_bit(i, iommu->domain_ids); - iommu->domains[i] = NULL; - spin_unlock_irqrestore(&iommu->lock, flags); - break; - } - } - } -} - -static void vm_domain_exit(struct dmar_domain *domain) -{ - /* Domain 0 is reserved, so dont process it */ - if (!domain) - return; - - vm_domain_remove_all_dev_info(domain); - /* destroy iovas */ - put_iova_domain(&domain->iovad); - - /* clear ptes */ - dma_pte_clear_range(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); - - /* free page tables */ - dma_pte_free_pagetable(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); - - iommu_free_vm_domain(domain); - free_domain_mem(domain); -} - static int intel_iommu_domain_init(struct iommu_domain *domain) { struct dmar_domain *dmar_domain; - dmar_domain = iommu_alloc_vm_domain(); + dmar_domain = alloc_domain(true); if (!dmar_domain) { printk(KERN_ERR "intel_iommu_domain_init: dmar_domain == NULL\n"); @@ -3967,7 +4173,7 @@ static int intel_iommu_domain_init(struct iommu_domain *domain) if (md_domain_init(dmar_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) { printk(KERN_ERR "intel_iommu_domain_init() failed\n"); - vm_domain_exit(dmar_domain); + domain_exit(dmar_domain); return -ENOMEM; } domain_update_iommu_cap(dmar_domain); @@ -3985,33 +4191,32 @@ static void intel_iommu_domain_destroy(struct iommu_domain *domain) struct dmar_domain *dmar_domain = domain->priv; domain->priv = NULL; - vm_domain_exit(dmar_domain); + domain_exit(dmar_domain); } static int intel_iommu_attach_device(struct iommu_domain *domain, struct device *dev) { struct dmar_domain *dmar_domain = domain->priv; - struct pci_dev *pdev = to_pci_dev(dev); struct intel_iommu *iommu; int addr_width; + u8 bus, devfn; - /* normally pdev is not mapped */ - if (unlikely(domain_context_mapped(pdev))) { + /* normally dev is not mapped */ + if (unlikely(domain_context_mapped(dev))) { struct dmar_domain *old_domain; - old_domain = find_domain(pdev); + old_domain = find_domain(dev); if (old_domain) { if (dmar_domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE || dmar_domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) - domain_remove_one_dev_info(old_domain, pdev); + domain_remove_one_dev_info(old_domain, dev); else domain_remove_dev_info(old_domain); } } - iommu = device_to_iommu(pci_domain_nr(pdev->bus), pdev->bus->number, - pdev->devfn); + iommu = device_to_iommu(dev, &bus, &devfn); if (!iommu) return -ENODEV; @@ -4043,16 +4248,15 @@ static int intel_iommu_attach_device(struct iommu_domain *domain, dmar_domain->agaw--; } - return domain_add_dev_info(dmar_domain, pdev, CONTEXT_TT_MULTI_LEVEL); + return domain_add_dev_info(dmar_domain, dev, CONTEXT_TT_MULTI_LEVEL); } static void intel_iommu_detach_device(struct iommu_domain *domain, struct device *dev) { struct dmar_domain *dmar_domain = domain->priv; - struct pci_dev *pdev = to_pci_dev(dev); - domain_remove_one_dev_info(dmar_domain, pdev); + domain_remove_one_dev_info(dmar_domain, dev); } static int intel_iommu_map(struct iommu_domain *domain, @@ -4094,28 +4298,62 @@ static int intel_iommu_map(struct iommu_domain *domain, } static size_t intel_iommu_unmap(struct iommu_domain *domain, - unsigned long iova, size_t size) + unsigned long iova, size_t size) { struct dmar_domain *dmar_domain = domain->priv; - int order; + struct page *freelist = NULL; + struct intel_iommu *iommu; + unsigned long start_pfn, last_pfn; + unsigned int npages; + int iommu_id, num, ndomains, level = 0; + + /* Cope with horrid API which requires us to unmap more than the + size argument if it happens to be a large-page mapping. */ + if (!pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT, &level)) + BUG(); + + if (size < VTD_PAGE_SIZE << level_to_offset_bits(level)) + size = VTD_PAGE_SIZE << level_to_offset_bits(level); + + start_pfn = iova >> VTD_PAGE_SHIFT; + last_pfn = (iova + size - 1) >> VTD_PAGE_SHIFT; + + freelist = domain_unmap(dmar_domain, start_pfn, last_pfn); + + npages = last_pfn - start_pfn + 1; + + for_each_set_bit(iommu_id, dmar_domain->iommu_bmp, g_num_of_iommus) { + iommu = g_iommus[iommu_id]; + + /* + * find bit position of dmar_domain + */ + ndomains = cap_ndoms(iommu->cap); + for_each_set_bit(num, iommu->domain_ids, ndomains) { + if (iommu->domains[num] == dmar_domain) + iommu_flush_iotlb_psi(iommu, num, start_pfn, + npages, !freelist, 0); + } - order = dma_pte_clear_range(dmar_domain, iova >> VTD_PAGE_SHIFT, - (iova + size - 1) >> VTD_PAGE_SHIFT); + } + + dma_free_pagelist(freelist); if (dmar_domain->max_addr == iova + size) dmar_domain->max_addr = iova; - return PAGE_SIZE << order; + return size; } static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, - unsigned long iova) + dma_addr_t iova) { struct dmar_domain *dmar_domain = domain->priv; struct dma_pte *pte; + int level = 0; u64 phys = 0; - pte = pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT, 0); + pte = pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT, &level); if (pte) phys = dma_pte_addr(pte); @@ -4135,12 +4373,6 @@ static int intel_iommu_domain_has_cap(struct iommu_domain *domain, return 0; } -static void swap_pci_ref(struct pci_dev **from, struct pci_dev *to) -{ - pci_dev_put(*from); - *from = to; -} - #define REQ_ACS_FLAGS (PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF) static int intel_iommu_add_device(struct device *dev) @@ -4149,9 +4381,9 @@ static int intel_iommu_add_device(struct device *dev) struct pci_dev *bridge, *dma_pdev = NULL; struct iommu_group *group; int ret; + u8 bus, devfn; - if (!device_to_iommu(pci_domain_nr(pdev->bus), - pdev->bus->number, pdev->devfn)) + if (!device_to_iommu(dev, &bus, &devfn)) return -ENODEV; bridge = pci_find_upstream_pcie_bridge(pdev); @@ -4170,14 +4402,27 @@ static int intel_iommu_add_device(struct device *dev) /* * If it's a multifunction device that does not support our - * required ACS flags, add to the same group as function 0. + * required ACS flags, add to the same group as lowest numbered + * function that also does not suport the required ACS flags. */ if (dma_pdev->multifunction && - !pci_acs_enabled(dma_pdev, REQ_ACS_FLAGS)) - swap_pci_ref(&dma_pdev, - pci_get_slot(dma_pdev->bus, - PCI_DEVFN(PCI_SLOT(dma_pdev->devfn), - 0))); + !pci_acs_enabled(dma_pdev, REQ_ACS_FLAGS)) { + u8 i, slot = PCI_SLOT(dma_pdev->devfn); + + for (i = 0; i < 8; i++) { + struct pci_dev *tmp; + + tmp = pci_get_slot(dma_pdev->bus, PCI_DEVFN(slot, i)); + if (!tmp) + continue; + + if (!pci_acs_enabled(tmp, REQ_ACS_FLAGS)) { + swap_pci_ref(&dma_pdev, tmp); + break; + } + pci_dev_put(tmp); + } + } /* * Devices on the root bus go through the iommu. If that's not us, @@ -4234,23 +4479,38 @@ static struct iommu_ops intel_iommu_ops = { .pgsize_bitmap = INTEL_IOMMU_PGSIZES, }; +static void quirk_iommu_g4x_gfx(struct pci_dev *dev) +{ + /* G4x/GM45 integrated gfx dmar support is totally busted. */ + printk(KERN_INFO "DMAR: Disabling IOMMU for graphics on this chipset\n"); + dmar_map_gfx = 0; +} + +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_g4x_gfx); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e00, quirk_iommu_g4x_gfx); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e10, quirk_iommu_g4x_gfx); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e20, quirk_iommu_g4x_gfx); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e30, quirk_iommu_g4x_gfx); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e40, quirk_iommu_g4x_gfx); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e90, quirk_iommu_g4x_gfx); + static void quirk_iommu_rwbf(struct pci_dev *dev) { /* * Mobile 4 Series Chipset neglects to set RWBF capability, - * but needs it: + * but needs it. Same seems to hold for the desktop versions. */ printk(KERN_INFO "DMAR: Forcing write-buffer flush capability\n"); rwbf_quirk = 1; - - /* https://bugzilla.redhat.com/show_bug.cgi?id=538163 */ - if (dev->revision == 0x07) { - printk(KERN_INFO "DMAR: Disabling IOMMU for graphics on this chipset\n"); - dmar_map_gfx = 0; - } } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e00, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e10, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e20, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e30, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e40, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e90, quirk_iommu_rwbf); #define GGC 0x52 #define GGC_MEMORY_SIZE_MASK (0xf << 8) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index af8904de1d4..9b174893f0f 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -6,11 +6,11 @@ #include <linux/hpet.h> #include <linux/pci.h> #include <linux/irq.h> +#include <linux/intel-iommu.h> +#include <linux/acpi.h> #include <asm/io_apic.h> #include <asm/smp.h> #include <asm/cpu.h> -#include <linux/intel-iommu.h> -#include <acpi/acpi.h> #include <asm/irq_remapping.h> #include <asm/pci-direct.h> #include <asm/msidef.h> @@ -38,15 +38,28 @@ static struct ioapic_scope ir_ioapic[MAX_IO_APICS]; static struct hpet_scope ir_hpet[MAX_HPET_TBS]; static int ir_ioapic_num, ir_hpet_num; +/* + * Lock ordering: + * ->dmar_global_lock + * ->irq_2_ir_lock + * ->qi->q_lock + * ->iommu->register_lock + * Note: + * intel_irq_remap_ops.{supported,prepare,enable,disable,reenable} are called + * in single-threaded environment with interrupt disabled, so no need to tabke + * the dmar_global_lock. + */ static DEFINE_RAW_SPINLOCK(irq_2_ir_lock); +static int __init parse_ioapics_under_ir(void); + static struct irq_2_iommu *irq_2_iommu(unsigned int irq) { struct irq_cfg *cfg = irq_get_chip_data(irq); return cfg ? &cfg->irq_2_iommu : NULL; } -int get_irte(int irq, struct irte *entry) +static int get_irte(int irq, struct irte *entry) { struct irq_2_iommu *irq_iommu = irq_2_iommu(irq); unsigned long flags; @@ -68,19 +81,14 @@ static int alloc_irte(struct intel_iommu *iommu, int irq, u16 count) { struct ir_table *table = iommu->ir_table; struct irq_2_iommu *irq_iommu = irq_2_iommu(irq); - u16 index, start_index; + struct irq_cfg *cfg = irq_get_chip_data(irq); unsigned int mask = 0; unsigned long flags; - int i; + int index; if (!count || !irq_iommu) return -1; - /* - * start the IRTE search from index 0. - */ - index = start_index = 0; - if (count > 1) { count = __roundup_pow_of_two(count); mask = ilog2(count); @@ -95,31 +103,17 @@ static int alloc_irte(struct intel_iommu *iommu, int irq, u16 count) } raw_spin_lock_irqsave(&irq_2_ir_lock, flags); - do { - for (i = index; i < index + count; i++) - if (table->base[i].present) - break; - /* empty index found */ - if (i == index + count) - break; - - index = (index + count) % INTR_REMAP_TABLE_ENTRIES; - - if (index == start_index) { - raw_spin_unlock_irqrestore(&irq_2_ir_lock, flags); - printk(KERN_ERR "can't allocate an IRTE\n"); - return -1; - } - } while (1); - - for (i = index; i < index + count; i++) - table->base[i].present = 1; - - irq_iommu->iommu = iommu; - irq_iommu->irte_index = index; - irq_iommu->sub_handle = 0; - irq_iommu->irte_mask = mask; - + index = bitmap_find_free_region(table->bitmap, + INTR_REMAP_TABLE_ENTRIES, mask); + if (index < 0) { + pr_warn("IR%d: can't allocate an IRTE\n", iommu->seq_id); + } else { + cfg->remapped = 1; + irq_iommu->iommu = iommu; + irq_iommu->irte_index = index; + irq_iommu->sub_handle = 0; + irq_iommu->irte_mask = mask; + } raw_spin_unlock_irqrestore(&irq_2_ir_lock, flags); return index; @@ -155,6 +149,7 @@ static int map_irq_to_irte_handle(int irq, u16 *sub_handle) static int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index, u16 subhandle) { struct irq_2_iommu *irq_iommu = irq_2_iommu(irq); + struct irq_cfg *cfg = irq_get_chip_data(irq); unsigned long flags; if (!irq_iommu) @@ -162,6 +157,7 @@ static int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index, u16 subha raw_spin_lock_irqsave(&irq_2_ir_lock, flags); + cfg->remapped = 1; irq_iommu->iommu = iommu; irq_iommu->irte_index = index; irq_iommu->sub_handle = subhandle; @@ -250,6 +246,8 @@ static int clear_entries(struct irq_2_iommu *irq_iommu) set_64bit(&entry->low, 0); set_64bit(&entry->high, 0); } + bitmap_release_region(iommu->ir_table->bitmap, index, + irq_iommu->irte_mask); return qi_flush_iec(iommu, index, irq_iommu->irte_mask); } @@ -320,19 +318,21 @@ static int set_ioapic_sid(struct irte *irte, int apic) if (!irte) return -1; + down_read(&dmar_global_lock); for (i = 0; i < MAX_IO_APICS; i++) { if (ir_ioapic[i].id == apic) { sid = (ir_ioapic[i].bus << 8) | ir_ioapic[i].devfn; break; } } + up_read(&dmar_global_lock); if (sid == 0) { pr_warning("Failed to set source-id of IOAPIC (%d)\n", apic); return -1; } - set_irte_sid(irte, 1, 0, sid); + set_irte_sid(irte, SVT_VERIFY_SID_SQ, SQ_ALL_16, sid); return 0; } @@ -345,12 +345,14 @@ static int set_hpet_sid(struct irte *irte, u8 id) if (!irte) return -1; + down_read(&dmar_global_lock); for (i = 0; i < MAX_HPET_TBS; i++) { if (ir_hpet[i].id == id) { sid = (ir_hpet[i].bus << 8) | ir_hpet[i].devfn; break; } } + up_read(&dmar_global_lock); if (sid == 0) { pr_warning("Failed to set source-id of HPET block (%d)\n", id); @@ -425,11 +427,22 @@ static void iommu_set_irq_remapping(struct intel_iommu *iommu, int mode) /* Enable interrupt-remapping */ iommu->gcmd |= DMA_GCMD_IRE; + iommu->gcmd &= ~DMA_GCMD_CFI; /* Block compatibility-format MSIs */ writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, (sts & DMA_GSTS_IRES), sts); + /* + * With CFI clear in the Global Command register, we should be + * protected from dangerous (i.e. compatibility) interrupts + * regardless of x2apic status. Check just to be sure. + */ + if (sts & DMA_GSTS_CFIS) + WARN(1, KERN_WARNING + "Compatibility-format IRQs enabled despite intr remapping;\n" + "you are vulnerable to IRQ injection.\n"); + raw_spin_unlock_irqrestore(&iommu->register_lock, flags); } @@ -438,6 +451,7 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu, int mode) { struct ir_table *ir_table; struct page *pages; + unsigned long *bitmap; ir_table = iommu->ir_table = kzalloc(sizeof(struct ir_table), GFP_ATOMIC); @@ -449,13 +463,23 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu, int mode) INTR_REMAP_PAGE_ORDER); if (!pages) { - printk(KERN_ERR "failed to allocate pages of order %d\n", - INTR_REMAP_PAGE_ORDER); + pr_err("IR%d: failed to allocate pages of order %d\n", + iommu->seq_id, INTR_REMAP_PAGE_ORDER); kfree(iommu->ir_table); return -ENOMEM; } + bitmap = kcalloc(BITS_TO_LONGS(INTR_REMAP_TABLE_ENTRIES), + sizeof(long), GFP_ATOMIC); + if (bitmap == NULL) { + pr_err("IR%d: failed to allocate bitmap\n", iommu->seq_id); + __free_pages(pages, INTR_REMAP_PAGE_ORDER); + kfree(ir_table); + return -ENOMEM; + } + ir_table->base = page_address(pages); + ir_table->bitmap = bitmap; iommu_set_irq_remapping(iommu, mode); return 0; @@ -506,19 +530,28 @@ static int __init dmar_x2apic_optout(void) static int __init intel_irq_remapping_supported(void) { struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; if (disable_irq_remap) return 0; + if (irq_remap_broken) { + printk(KERN_WARNING + "This system BIOS has enabled interrupt remapping\n" + "on a chipset that contains an erratum making that\n" + "feature unstable. To maintain system stability\n" + "interrupt remapping is being disabled. Please\n" + "contact your BIOS vendor for an update\n"); + add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); + disable_irq_remap = 1; + return 0; + } if (!dmar_ir_support()) return 0; - for_each_drhd_unit(drhd) { - struct intel_iommu *iommu = drhd->iommu; - + for_each_iommu(iommu, drhd) if (!ecap_ir_support(iommu->ecap)) return 0; - } return 1; } @@ -526,25 +559,30 @@ static int __init intel_irq_remapping_supported(void) static int __init intel_enable_irq_remapping(void) { struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; + bool x2apic_present; int setup = 0; int eim = 0; + x2apic_present = x2apic_supported(); + if (parse_ioapics_under_ir() != 1) { printk(KERN_INFO "Not enable interrupt remapping\n"); - return -1; + goto error; } - if (x2apic_supported()) { + if (x2apic_present) { + pr_info("Queued invalidation will be enabled to support x2apic and Intr-remapping.\n"); + eim = !dmar_x2apic_optout(); - WARN(!eim, KERN_WARNING - "Your BIOS is broken and requested that x2apic be disabled\n" - "This will leave your machine vulnerable to irq-injection attacks\n" - "Use 'intremap=no_x2apic_optout' to override BIOS request\n"); + if (!eim) + printk(KERN_WARNING + "Your BIOS is broken and requested that x2apic be disabled.\n" + "This will slightly decrease performance.\n" + "Use 'intremap=no_x2apic_optout' to override BIOS request.\n"); } - for_each_drhd_unit(drhd) { - struct intel_iommu *iommu = drhd->iommu; - + for_each_iommu(iommu, drhd) { /* * If the queued invalidation is already initialized, * shouldn't disable it. @@ -569,41 +607,35 @@ static int __init intel_enable_irq_remapping(void) /* * check for the Interrupt-remapping support */ - for_each_drhd_unit(drhd) { - struct intel_iommu *iommu = drhd->iommu; - + for_each_iommu(iommu, drhd) { if (!ecap_ir_support(iommu->ecap)) continue; if (eim && !ecap_eim_support(iommu->ecap)) { printk(KERN_INFO "DRHD %Lx: EIM not supported by DRHD, " " ecap %Lx\n", drhd->reg_base_addr, iommu->ecap); - return -1; + goto error; } } /* * Enable queued invalidation for all the DRHD's. */ - for_each_drhd_unit(drhd) { - int ret; - struct intel_iommu *iommu = drhd->iommu; - ret = dmar_enable_qi(iommu); + for_each_iommu(iommu, drhd) { + int ret = dmar_enable_qi(iommu); if (ret) { printk(KERN_ERR "DRHD %Lx: failed to enable queued, " " invalidation, ecap %Lx, ret %d\n", drhd->reg_base_addr, iommu->ecap, ret); - return -1; + goto error; } } /* * Setup Interrupt-remapping for all the DRHD's now. */ - for_each_drhd_unit(drhd) { - struct intel_iommu *iommu = drhd->iommu; - + for_each_iommu(iommu, drhd) { if (!ecap_ir_support(iommu->ecap)) continue; @@ -617,6 +649,14 @@ static int __init intel_enable_irq_remapping(void) goto error; irq_remapping_enabled = 1; + + /* + * VT-d has a different layout for IO-APIC entries when + * interrupt remapping is enabled. So it needs a special routine + * to print IO-APIC entries for debugging purposes too. + */ + x86_io_apic_ops.print_entries = intel_ir_io_apic_print_entries; + pr_info("Enabled IRQ remapping in %s mode\n", eim ? "x2apic" : "xapic"); return eim ? IRQ_REMAP_X2APIC_MODE : IRQ_REMAP_XAPIC_MODE; @@ -625,6 +665,10 @@ error: /* * handle error condition gracefully here! */ + + if (x2apic_present) + pr_warn("Failed to enable irq remapping. You are vulnerable to irq-injection attacks.\n"); + return -1; } @@ -645,12 +689,12 @@ static void ir_parse_one_hpet_scope(struct acpi_dmar_device_scope *scope, * Access PCI directly due to the PCI * subsystem isn't initialized yet. */ - bus = read_pci_config_byte(bus, path->dev, path->fn, + bus = read_pci_config_byte(bus, path->device, path->function, PCI_SECONDARY_BUS); path++; } ir_hpet[ir_hpet_num].bus = bus; - ir_hpet[ir_hpet_num].devfn = PCI_DEVFN(path->dev, path->fn); + ir_hpet[ir_hpet_num].devfn = PCI_DEVFN(path->device, path->function); ir_hpet[ir_hpet_num].iommu = iommu; ir_hpet[ir_hpet_num].id = scope->enumeration_id; ir_hpet_num++; @@ -673,13 +717,13 @@ static void ir_parse_one_ioapic_scope(struct acpi_dmar_device_scope *scope, * Access PCI directly due to the PCI * subsystem isn't initialized yet. */ - bus = read_pci_config_byte(bus, path->dev, path->fn, + bus = read_pci_config_byte(bus, path->device, path->function, PCI_SECONDARY_BUS); path++; } ir_ioapic[ir_ioapic_num].bus = bus; - ir_ioapic[ir_ioapic_num].devfn = PCI_DEVFN(path->dev, path->fn); + ir_ioapic[ir_ioapic_num].devfn = PCI_DEVFN(path->device, path->function); ir_ioapic[ir_ioapic_num].iommu = iommu; ir_ioapic[ir_ioapic_num].id = scope->enumeration_id; ir_ioapic_num++; @@ -732,22 +776,20 @@ static int ir_parse_ioapic_hpet_scope(struct acpi_dmar_header *header, * Finds the assocaition between IOAPIC's and its Interrupt-remapping * hardware unit. */ -int __init parse_ioapics_under_ir(void) +static int __init parse_ioapics_under_ir(void) { struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; int ir_supported = 0; int ioapic_idx; - for_each_drhd_unit(drhd) { - struct intel_iommu *iommu = drhd->iommu; - + for_each_iommu(iommu, drhd) if (ecap_ir_support(iommu->ecap)) { if (ir_parse_ioapic_hpet_scope(drhd->hdr, iommu)) return -1; ir_supported = 1; } - } if (!ir_supported) return 0; @@ -765,12 +807,18 @@ int __init parse_ioapics_under_ir(void) return 1; } -int __init ir_dev_scope_init(void) +static int __init ir_dev_scope_init(void) { + int ret; + if (!irq_remapping_enabled) return 0; - return dmar_dev_scope_init(); + down_write(&dmar_global_lock); + ret = dmar_dev_scope_init(); + up_write(&dmar_global_lock); + + return ret; } rootfs_initcall(ir_dev_scope_init); @@ -851,23 +899,27 @@ static int intel_setup_ioapic_entry(int irq, struct io_apic_irq_attr *attr) { int ioapic_id = mpc_ioapic_id(attr->ioapic); - struct intel_iommu *iommu = map_ioapic_to_ir(ioapic_id); + struct intel_iommu *iommu; struct IR_IO_APIC_route_entry *entry; struct irte irte; int index; + down_read(&dmar_global_lock); + iommu = map_ioapic_to_ir(ioapic_id); if (!iommu) { pr_warn("No mapping iommu for ioapic %d\n", ioapic_id); - return -ENODEV; - } - - entry = (struct IR_IO_APIC_route_entry *)route_entry; - - index = alloc_irte(iommu, irq, 1); - if (index < 0) { - pr_warn("Failed to allocate IRTE for ioapic %d\n", ioapic_id); - return -ENOMEM; + index = -ENODEV; + } else { + index = alloc_irte(iommu, irq, 1); + if (index < 0) { + pr_warn("Failed to allocate IRTE for ioapic %d\n", + ioapic_id); + index = -ENOMEM; + } } + up_read(&dmar_global_lock); + if (index < 0) + return index; prepare_irte(&irte, vector, destination); @@ -886,6 +938,7 @@ static int intel_setup_ioapic_entry(int irq, irte.avail, irte.vector, irte.dest_id, irte.sid, irte.sq, irte.svt); + entry = (struct IR_IO_APIC_route_entry *)route_entry; memset(entry, 0, sizeof(*entry)); entry->index2 = (index >> 15) & 0x1; @@ -1016,20 +1069,23 @@ static int intel_msi_alloc_irq(struct pci_dev *dev, int irq, int nvec) struct intel_iommu *iommu; int index; + down_read(&dmar_global_lock); iommu = map_dev_to_ir(dev); if (!iommu) { printk(KERN_ERR "Unable to map PCI %s to iommu\n", pci_name(dev)); - return -ENOENT; + index = -ENOENT; + } else { + index = alloc_irte(iommu, irq, nvec); + if (index < 0) { + printk(KERN_ERR + "Unable to allocate %d IRTE for PCI %s\n", + nvec, pci_name(dev)); + index = -ENOSPC; + } } + up_read(&dmar_global_lock); - index = alloc_irte(iommu, irq, nvec); - if (index < 0) { - printk(KERN_ERR - "Unable to allocate %d IRTE for PCI %s\n", nvec, - pci_name(dev)); - return -ENOSPC; - } return index; } @@ -1037,33 +1093,40 @@ static int intel_msi_setup_irq(struct pci_dev *pdev, unsigned int irq, int index, int sub_handle) { struct intel_iommu *iommu; + int ret = -ENOENT; + down_read(&dmar_global_lock); iommu = map_dev_to_ir(pdev); - if (!iommu) - return -ENOENT; - /* - * setup the mapping between the irq and the IRTE - * base index, the sub_handle pointing to the - * appropriate interrupt remap table entry. - */ - set_irte_irq(irq, iommu, index, sub_handle); + if (iommu) { + /* + * setup the mapping between the irq and the IRTE + * base index, the sub_handle pointing to the + * appropriate interrupt remap table entry. + */ + set_irte_irq(irq, iommu, index, sub_handle); + ret = 0; + } + up_read(&dmar_global_lock); - return 0; + return ret; } static int intel_setup_hpet_msi(unsigned int irq, unsigned int id) { - struct intel_iommu *iommu = map_hpet_to_ir(id); + int ret = -1; + struct intel_iommu *iommu; int index; - if (!iommu) - return -1; - - index = alloc_irte(iommu, irq, 1); - if (index < 0) - return -1; + down_read(&dmar_global_lock); + iommu = map_hpet_to_ir(id); + if (iommu) { + index = alloc_irte(iommu, irq, 1); + if (index >= 0) + ret = 0; + } + up_read(&dmar_global_lock); - return 0; + return ret; } struct irq_remap_ops intel_irq_remap_ops = { diff --git a/drivers/iommu/iommu-traces.c b/drivers/iommu/iommu-traces.c new file mode 100644 index 00000000000..bf3b317ff0c --- /dev/null +++ b/drivers/iommu/iommu-traces.c @@ -0,0 +1,27 @@ +/* + * iommu trace points + * + * Copyright (C) 2013 Shuah Khan <shuah.kh@samsung.com> + * + */ + +#include <linux/string.h> +#include <linux/types.h> + +#define CREATE_TRACE_POINTS +#include <trace/events/iommu.h> + +/* iommu_group_event */ +EXPORT_TRACEPOINT_SYMBOL_GPL(add_device_to_group); +EXPORT_TRACEPOINT_SYMBOL_GPL(remove_device_from_group); + +/* iommu_device_event */ +EXPORT_TRACEPOINT_SYMBOL_GPL(attach_device_to_domain); +EXPORT_TRACEPOINT_SYMBOL_GPL(detach_device_from_domain); + +/* iommu_map_unmap */ +EXPORT_TRACEPOINT_SYMBOL_GPL(map); +EXPORT_TRACEPOINT_SYMBOL_GPL(unmap); + +/* iommu_error */ +EXPORT_TRACEPOINT_SYMBOL_GPL(io_page_fault); diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index ddbdacad776..e5555fcfe70 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -29,6 +29,7 @@ #include <linux/idr.h> #include <linux/notifier.h> #include <linux/err.h> +#include <trace/events/iommu.h> static struct kset *iommu_group_kset; static struct ida iommu_group_ida; @@ -204,6 +205,35 @@ again: } EXPORT_SYMBOL_GPL(iommu_group_alloc); +struct iommu_group *iommu_group_get_by_id(int id) +{ + struct kobject *group_kobj; + struct iommu_group *group; + const char *name; + + if (!iommu_group_kset) + return NULL; + + name = kasprintf(GFP_KERNEL, "%d", id); + if (!name) + return NULL; + + group_kobj = kset_find_obj(iommu_group_kset, name); + kfree(name); + + if (!group_kobj) + return NULL; + + group = container_of(group_kobj, struct iommu_group, kobj); + BUG_ON(group->id != id); + + kobject_get(group->devices_kobj); + kobject_put(&group->kobj); + + return group; +} +EXPORT_SYMBOL_GPL(iommu_group_get_by_id); + /** * iommu_group_get_iommudata - retrieve iommu_data registered for a group * @group: the group @@ -334,6 +364,8 @@ rename: /* Notify any listeners about change to group. */ blocking_notifier_call_chain(&group->notifier, IOMMU_GROUP_NOTIFY_ADD_DEVICE, dev); + + trace_add_device_to_group(group->id, dev); return 0; } EXPORT_SYMBOL_GPL(iommu_group_add_device); @@ -370,6 +402,8 @@ void iommu_group_remove_device(struct device *dev) sysfs_remove_link(group->devices_kobj, device->name); sysfs_remove_link(&dev->kobj, "iommu_group"); + trace_remove_device_from_group(group->id, dev); + kfree(device->name); kfree(device); dev->iommu_group = NULL; @@ -651,10 +685,14 @@ EXPORT_SYMBOL_GPL(iommu_domain_free); int iommu_attach_device(struct iommu_domain *domain, struct device *dev) { + int ret; if (unlikely(domain->ops->attach_dev == NULL)) return -ENODEV; - return domain->ops->attach_dev(domain, dev); + ret = domain->ops->attach_dev(domain, dev); + if (!ret) + trace_attach_device_to_domain(dev); + return ret; } EXPORT_SYMBOL_GPL(iommu_attach_device); @@ -664,6 +702,7 @@ void iommu_detach_device(struct iommu_domain *domain, struct device *dev) return; domain->ops->detach_dev(domain, dev); + trace_detach_device_from_domain(dev); } EXPORT_SYMBOL_GPL(iommu_detach_device); @@ -706,8 +745,7 @@ void iommu_detach_group(struct iommu_domain *domain, struct iommu_group *group) } EXPORT_SYMBOL_GPL(iommu_detach_group); -phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, - unsigned long iova) +phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova) { if (unlikely(domain->ops->iova_to_phys == NULL)) return 0; @@ -726,6 +764,38 @@ int iommu_domain_has_cap(struct iommu_domain *domain, } EXPORT_SYMBOL_GPL(iommu_domain_has_cap); +static size_t iommu_pgsize(struct iommu_domain *domain, + unsigned long addr_merge, size_t size) +{ + unsigned int pgsize_idx; + size_t pgsize; + + /* Max page size that still fits into 'size' */ + pgsize_idx = __fls(size); + + /* need to consider alignment requirements ? */ + if (likely(addr_merge)) { + /* Max page size allowed by address */ + unsigned int align_pgsize_idx = __ffs(addr_merge); + pgsize_idx = min(pgsize_idx, align_pgsize_idx); + } + + /* build a mask of acceptable page sizes */ + pgsize = (1UL << (pgsize_idx + 1)) - 1; + + /* throw away page sizes not supported by the hardware */ + pgsize &= domain->ops->pgsize_bitmap; + + /* make sure we're still sane */ + BUG_ON(!pgsize); + + /* pick the biggest page */ + pgsize_idx = __fls(pgsize); + pgsize = 1UL << pgsize_idx; + + return pgsize; +} + int iommu_map(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot) { @@ -734,7 +804,8 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova, size_t orig_size = size; int ret = 0; - if (unlikely(domain->ops->map == NULL)) + if (unlikely(domain->ops->unmap == NULL || + domain->ops->pgsize_bitmap == 0UL)) return -ENODEV; /* find out the minimum page size supported */ @@ -746,45 +817,18 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova, * size of the smallest page supported by the hardware */ if (!IS_ALIGNED(iova | paddr | size, min_pagesz)) { - pr_err("unaligned: iova 0x%lx pa 0x%lx size 0x%lx min_pagesz " - "0x%x\n", iova, (unsigned long)paddr, - (unsigned long)size, min_pagesz); + pr_err("unaligned: iova 0x%lx pa %pa size 0x%zx min_pagesz 0x%x\n", + iova, &paddr, size, min_pagesz); return -EINVAL; } - pr_debug("map: iova 0x%lx pa 0x%lx size 0x%lx\n", iova, - (unsigned long)paddr, (unsigned long)size); + pr_debug("map: iova 0x%lx pa %pa size 0x%zx\n", iova, &paddr, size); while (size) { - unsigned long pgsize, addr_merge = iova | paddr; - unsigned int pgsize_idx; + size_t pgsize = iommu_pgsize(domain, iova | paddr, size); - /* Max page size that still fits into 'size' */ - pgsize_idx = __fls(size); - - /* need to consider alignment requirements ? */ - if (likely(addr_merge)) { - /* Max page size allowed by both iova and paddr */ - unsigned int align_pgsize_idx = __ffs(addr_merge); - - pgsize_idx = min(pgsize_idx, align_pgsize_idx); - } - - /* build a mask of acceptable page sizes */ - pgsize = (1UL << (pgsize_idx + 1)) - 1; - - /* throw away page sizes not supported by the hardware */ - pgsize &= domain->ops->pgsize_bitmap; - - /* make sure we're still sane */ - BUG_ON(!pgsize); - - /* pick the biggest page */ - pgsize_idx = __fls(pgsize); - pgsize = 1UL << pgsize_idx; - - pr_debug("mapping: iova 0x%lx pa 0x%lx pgsize %lu\n", iova, - (unsigned long)paddr, pgsize); + pr_debug("mapping: iova 0x%lx pa %pa pgsize 0x%zx\n", + iova, &paddr, pgsize); ret = domain->ops->map(domain, iova, paddr, pgsize, prot); if (ret) @@ -798,6 +842,8 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova, /* unroll mapping in case something went wrong */ if (ret) iommu_unmap(domain, orig_iova, orig_size - size); + else + trace_map(iova, paddr, size); return ret; } @@ -808,7 +854,8 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) size_t unmapped_page, unmapped = 0; unsigned int min_pagesz; - if (unlikely(domain->ops->unmap == NULL)) + if (unlikely(domain->ops->unmap == NULL || + domain->ops->pgsize_bitmap == 0UL)) return -ENODEV; /* find out the minimum page size supported */ @@ -820,36 +867,57 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) * by the hardware */ if (!IS_ALIGNED(iova | size, min_pagesz)) { - pr_err("unaligned: iova 0x%lx size 0x%lx min_pagesz 0x%x\n", - iova, (unsigned long)size, min_pagesz); + pr_err("unaligned: iova 0x%lx size 0x%zx min_pagesz 0x%x\n", + iova, size, min_pagesz); return -EINVAL; } - pr_debug("unmap this: iova 0x%lx size 0x%lx\n", iova, - (unsigned long)size); + pr_debug("unmap this: iova 0x%lx size 0x%zx\n", iova, size); /* * Keep iterating until we either unmap 'size' bytes (or more) * or we hit an area that isn't mapped. */ while (unmapped < size) { - size_t left = size - unmapped; + size_t pgsize = iommu_pgsize(domain, iova, size - unmapped); - unmapped_page = domain->ops->unmap(domain, iova, left); + unmapped_page = domain->ops->unmap(domain, iova, pgsize); if (!unmapped_page) break; - pr_debug("unmapped: iova 0x%lx size %lx\n", iova, - (unsigned long)unmapped_page); + pr_debug("unmapped: iova 0x%lx size 0x%zx\n", + iova, unmapped_page); iova += unmapped_page; unmapped += unmapped_page; } + trace_unmap(iova, 0, size); return unmapped; } EXPORT_SYMBOL_GPL(iommu_unmap); + +int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr, + phys_addr_t paddr, u64 size, int prot) +{ + if (unlikely(domain->ops->domain_window_enable == NULL)) + return -ENODEV; + + return domain->ops->domain_window_enable(domain, wnd_nr, paddr, size, + prot); +} +EXPORT_SYMBOL_GPL(iommu_domain_window_enable); + +void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr) +{ + if (unlikely(domain->ops->domain_window_disable == NULL)) + return; + + return domain->ops->domain_window_disable(domain, wnd_nr); +} +EXPORT_SYMBOL_GPL(iommu_domain_window_disable); + static int __init iommu_init(void) { iommu_group_kset = kset_create_and_add("iommu_groups", @@ -861,13 +929,15 @@ static int __init iommu_init(void) return 0; } -subsys_initcall(iommu_init); +arch_initcall(iommu_init); int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr attr, void *data) { struct iommu_domain_geometry *geometry; + bool *paging; int ret = 0; + u32 *count; switch (attr) { case DOMAIN_ATTR_GEOMETRY: @@ -875,6 +945,19 @@ int iommu_domain_get_attr(struct iommu_domain *domain, *geometry = domain->geometry; break; + case DOMAIN_ATTR_PAGING: + paging = data; + *paging = (domain->ops->pgsize_bitmap != 0UL); + break; + case DOMAIN_ATTR_WINDOWS: + count = data; + + if (domain->ops->domain_get_windows != NULL) + *count = domain->ops->domain_get_windows(domain); + else + ret = -ENODEV; + + break; default: if (!domain->ops->domain_get_attr) return -EINVAL; @@ -889,9 +972,26 @@ EXPORT_SYMBOL_GPL(iommu_domain_get_attr); int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr attr, void *data) { - if (!domain->ops->domain_set_attr) - return -EINVAL; + int ret = 0; + u32 *count; + + switch (attr) { + case DOMAIN_ATTR_WINDOWS: + count = data; - return domain->ops->domain_set_attr(domain, attr, data); + if (domain->ops->domain_set_windows != NULL) + ret = domain->ops->domain_set_windows(domain, *count); + else + ret = -ENODEV; + + break; + default: + if (domain->ops->domain_set_attr == NULL) + return -EINVAL; + + ret = domain->ops->domain_set_attr(domain, attr, data); + } + + return ret; } EXPORT_SYMBOL_GPL(iommu_domain_set_attr); diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c index 67da6cff74e..f6b17e6af2f 100644 --- a/drivers/iommu/iova.c +++ b/drivers/iommu/iova.c @@ -342,19 +342,30 @@ __is_range_overlap(struct rb_node *node, return 0; } +static inline struct iova * +alloc_and_init_iova(unsigned long pfn_lo, unsigned long pfn_hi) +{ + struct iova *iova; + + iova = alloc_iova_mem(); + if (iova) { + iova->pfn_lo = pfn_lo; + iova->pfn_hi = pfn_hi; + } + + return iova; +} + static struct iova * __insert_new_range(struct iova_domain *iovad, unsigned long pfn_lo, unsigned long pfn_hi) { struct iova *iova; - iova = alloc_iova_mem(); - if (!iova) - return iova; + iova = alloc_and_init_iova(pfn_lo, pfn_hi); + if (iova) + iova_insert_rbtree(&iovad->rbroot, iova); - iova->pfn_hi = pfn_hi; - iova->pfn_lo = pfn_lo; - iova_insert_rbtree(&iovad->rbroot, iova); return iova; } @@ -433,3 +444,44 @@ copy_reserved_iova(struct iova_domain *from, struct iova_domain *to) } spin_unlock_irqrestore(&from->iova_rbtree_lock, flags); } + +struct iova * +split_and_remove_iova(struct iova_domain *iovad, struct iova *iova, + unsigned long pfn_lo, unsigned long pfn_hi) +{ + unsigned long flags; + struct iova *prev = NULL, *next = NULL; + + spin_lock_irqsave(&iovad->iova_rbtree_lock, flags); + if (iova->pfn_lo < pfn_lo) { + prev = alloc_and_init_iova(iova->pfn_lo, pfn_lo - 1); + if (prev == NULL) + goto error; + } + if (iova->pfn_hi > pfn_hi) { + next = alloc_and_init_iova(pfn_hi + 1, iova->pfn_hi); + if (next == NULL) + goto error; + } + + __cached_rbnode_delete_update(iovad, iova); + rb_erase(&iova->node, &iovad->rbroot); + + if (prev) { + iova_insert_rbtree(&iovad->rbroot, prev); + iova->pfn_lo = pfn_lo; + } + if (next) { + iova_insert_rbtree(&iovad->rbroot, next); + iova->pfn_hi = pfn_hi; + } + spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags); + + return iova; + +error: + spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags); + if (prev) + free_iova_mem(prev); + return NULL; +} diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c new file mode 100644 index 00000000000..53cde086e83 --- /dev/null +++ b/drivers/iommu/ipmmu-vmsa.c @@ -0,0 +1,1255 @@ +/* + * IPMMU VMSA + * + * Copyright (C) 2014 Renesas Electronics Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + */ + +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/err.h> +#include <linux/export.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/iommu.h> +#include <linux/module.h> +#include <linux/platform_data/ipmmu-vmsa.h> +#include <linux/platform_device.h> +#include <linux/sizes.h> +#include <linux/slab.h> + +#include <asm/dma-iommu.h> +#include <asm/pgalloc.h> + +struct ipmmu_vmsa_device { + struct device *dev; + void __iomem *base; + struct list_head list; + + const struct ipmmu_vmsa_platform_data *pdata; + unsigned int num_utlbs; + + struct dma_iommu_mapping *mapping; +}; + +struct ipmmu_vmsa_domain { + struct ipmmu_vmsa_device *mmu; + struct iommu_domain *io_domain; + + unsigned int context_id; + spinlock_t lock; /* Protects mappings */ + pgd_t *pgd; +}; + +struct ipmmu_vmsa_archdata { + struct ipmmu_vmsa_device *mmu; + unsigned int utlb; +}; + +static DEFINE_SPINLOCK(ipmmu_devices_lock); +static LIST_HEAD(ipmmu_devices); + +#define TLB_LOOP_TIMEOUT 100 /* 100us */ + +/* ----------------------------------------------------------------------------- + * Registers Definition + */ + +#define IM_CTX_SIZE 0x40 + +#define IMCTR 0x0000 +#define IMCTR_TRE (1 << 17) +#define IMCTR_AFE (1 << 16) +#define IMCTR_RTSEL_MASK (3 << 4) +#define IMCTR_RTSEL_SHIFT 4 +#define IMCTR_TREN (1 << 3) +#define IMCTR_INTEN (1 << 2) +#define IMCTR_FLUSH (1 << 1) +#define IMCTR_MMUEN (1 << 0) + +#define IMCAAR 0x0004 + +#define IMTTBCR 0x0008 +#define IMTTBCR_EAE (1 << 31) +#define IMTTBCR_PMB (1 << 30) +#define IMTTBCR_SH1_NON_SHAREABLE (0 << 28) +#define IMTTBCR_SH1_OUTER_SHAREABLE (2 << 28) +#define IMTTBCR_SH1_INNER_SHAREABLE (3 << 28) +#define IMTTBCR_SH1_MASK (3 << 28) +#define IMTTBCR_ORGN1_NC (0 << 26) +#define IMTTBCR_ORGN1_WB_WA (1 << 26) +#define IMTTBCR_ORGN1_WT (2 << 26) +#define IMTTBCR_ORGN1_WB (3 << 26) +#define IMTTBCR_ORGN1_MASK (3 << 26) +#define IMTTBCR_IRGN1_NC (0 << 24) +#define IMTTBCR_IRGN1_WB_WA (1 << 24) +#define IMTTBCR_IRGN1_WT (2 << 24) +#define IMTTBCR_IRGN1_WB (3 << 24) +#define IMTTBCR_IRGN1_MASK (3 << 24) +#define IMTTBCR_TSZ1_MASK (7 << 16) +#define IMTTBCR_TSZ1_SHIFT 16 +#define IMTTBCR_SH0_NON_SHAREABLE (0 << 12) +#define IMTTBCR_SH0_OUTER_SHAREABLE (2 << 12) +#define IMTTBCR_SH0_INNER_SHAREABLE (3 << 12) +#define IMTTBCR_SH0_MASK (3 << 12) +#define IMTTBCR_ORGN0_NC (0 << 10) +#define IMTTBCR_ORGN0_WB_WA (1 << 10) +#define IMTTBCR_ORGN0_WT (2 << 10) +#define IMTTBCR_ORGN0_WB (3 << 10) +#define IMTTBCR_ORGN0_MASK (3 << 10) +#define IMTTBCR_IRGN0_NC (0 << 8) +#define IMTTBCR_IRGN0_WB_WA (1 << 8) +#define IMTTBCR_IRGN0_WT (2 << 8) +#define IMTTBCR_IRGN0_WB (3 << 8) +#define IMTTBCR_IRGN0_MASK (3 << 8) +#define IMTTBCR_SL0_LVL_2 (0 << 4) +#define IMTTBCR_SL0_LVL_1 (1 << 4) +#define IMTTBCR_TSZ0_MASK (7 << 0) +#define IMTTBCR_TSZ0_SHIFT O + +#define IMBUSCR 0x000c +#define IMBUSCR_DVM (1 << 2) +#define IMBUSCR_BUSSEL_SYS (0 << 0) +#define IMBUSCR_BUSSEL_CCI (1 << 0) +#define IMBUSCR_BUSSEL_IMCAAR (2 << 0) +#define IMBUSCR_BUSSEL_CCI_IMCAAR (3 << 0) +#define IMBUSCR_BUSSEL_MASK (3 << 0) + +#define IMTTLBR0 0x0010 +#define IMTTUBR0 0x0014 +#define IMTTLBR1 0x0018 +#define IMTTUBR1 0x001c + +#define IMSTR 0x0020 +#define IMSTR_ERRLVL_MASK (3 << 12) +#define IMSTR_ERRLVL_SHIFT 12 +#define IMSTR_ERRCODE_TLB_FORMAT (1 << 8) +#define IMSTR_ERRCODE_ACCESS_PERM (4 << 8) +#define IMSTR_ERRCODE_SECURE_ACCESS (5 << 8) +#define IMSTR_ERRCODE_MASK (7 << 8) +#define IMSTR_MHIT (1 << 4) +#define IMSTR_ABORT (1 << 2) +#define IMSTR_PF (1 << 1) +#define IMSTR_TF (1 << 0) + +#define IMMAIR0 0x0028 +#define IMMAIR1 0x002c +#define IMMAIR_ATTR_MASK 0xff +#define IMMAIR_ATTR_DEVICE 0x04 +#define IMMAIR_ATTR_NC 0x44 +#define IMMAIR_ATTR_WBRWA 0xff +#define IMMAIR_ATTR_SHIFT(n) ((n) << 3) +#define IMMAIR_ATTR_IDX_NC 0 +#define IMMAIR_ATTR_IDX_WBRWA 1 +#define IMMAIR_ATTR_IDX_DEV 2 + +#define IMEAR 0x0030 + +#define IMPCTR 0x0200 +#define IMPSTR 0x0208 +#define IMPEAR 0x020c +#define IMPMBA(n) (0x0280 + ((n) * 4)) +#define IMPMBD(n) (0x02c0 + ((n) * 4)) + +#define IMUCTR(n) (0x0300 + ((n) * 16)) +#define IMUCTR_FIXADDEN (1 << 31) +#define IMUCTR_FIXADD_MASK (0xff << 16) +#define IMUCTR_FIXADD_SHIFT 16 +#define IMUCTR_TTSEL_MMU(n) ((n) << 4) +#define IMUCTR_TTSEL_PMB (8 << 4) +#define IMUCTR_TTSEL_MASK (15 << 4) +#define IMUCTR_FLUSH (1 << 1) +#define IMUCTR_MMUEN (1 << 0) + +#define IMUASID(n) (0x0308 + ((n) * 16)) +#define IMUASID_ASID8_MASK (0xff << 8) +#define IMUASID_ASID8_SHIFT 8 +#define IMUASID_ASID0_MASK (0xff << 0) +#define IMUASID_ASID0_SHIFT 0 + +/* ----------------------------------------------------------------------------- + * Page Table Bits + */ + +/* + * VMSA states in section B3.6.3 "Control of Secure or Non-secure memory access, + * Long-descriptor format" that the NStable bit being set in a table descriptor + * will result in the NStable and NS bits of all child entries being ignored and + * considered as being set. The IPMMU seems not to comply with this, as it + * generates a secure access page fault if any of the NStable and NS bits isn't + * set when running in non-secure mode. + */ +#ifndef PMD_NSTABLE +#define PMD_NSTABLE (_AT(pmdval_t, 1) << 63) +#endif + +#define ARM_VMSA_PTE_XN (((pteval_t)3) << 53) +#define ARM_VMSA_PTE_CONT (((pteval_t)1) << 52) +#define ARM_VMSA_PTE_AF (((pteval_t)1) << 10) +#define ARM_VMSA_PTE_SH_NS (((pteval_t)0) << 8) +#define ARM_VMSA_PTE_SH_OS (((pteval_t)2) << 8) +#define ARM_VMSA_PTE_SH_IS (((pteval_t)3) << 8) +#define ARM_VMSA_PTE_SH_MASK (((pteval_t)3) << 8) +#define ARM_VMSA_PTE_NS (((pteval_t)1) << 5) +#define ARM_VMSA_PTE_PAGE (((pteval_t)3) << 0) + +/* Stage-1 PTE */ +#define ARM_VMSA_PTE_nG (((pteval_t)1) << 11) +#define ARM_VMSA_PTE_AP_UNPRIV (((pteval_t)1) << 6) +#define ARM_VMSA_PTE_AP_RDONLY (((pteval_t)2) << 6) +#define ARM_VMSA_PTE_AP_MASK (((pteval_t)3) << 6) +#define ARM_VMSA_PTE_ATTRINDX_MASK (((pteval_t)3) << 2) +#define ARM_VMSA_PTE_ATTRINDX_SHIFT 2 + +#define ARM_VMSA_PTE_ATTRS_MASK \ + (ARM_VMSA_PTE_XN | ARM_VMSA_PTE_CONT | ARM_VMSA_PTE_nG | \ + ARM_VMSA_PTE_AF | ARM_VMSA_PTE_SH_MASK | ARM_VMSA_PTE_AP_MASK | \ + ARM_VMSA_PTE_NS | ARM_VMSA_PTE_ATTRINDX_MASK) + +#define ARM_VMSA_PTE_CONT_ENTRIES 16 +#define ARM_VMSA_PTE_CONT_SIZE (PAGE_SIZE * ARM_VMSA_PTE_CONT_ENTRIES) + +#define IPMMU_PTRS_PER_PTE 512 +#define IPMMU_PTRS_PER_PMD 512 +#define IPMMU_PTRS_PER_PGD 4 + +/* ----------------------------------------------------------------------------- + * Read/Write Access + */ + +static u32 ipmmu_read(struct ipmmu_vmsa_device *mmu, unsigned int offset) +{ + return ioread32(mmu->base + offset); +} + +static void ipmmu_write(struct ipmmu_vmsa_device *mmu, unsigned int offset, + u32 data) +{ + iowrite32(data, mmu->base + offset); +} + +static u32 ipmmu_ctx_read(struct ipmmu_vmsa_domain *domain, unsigned int reg) +{ + return ipmmu_read(domain->mmu, domain->context_id * IM_CTX_SIZE + reg); +} + +static void ipmmu_ctx_write(struct ipmmu_vmsa_domain *domain, unsigned int reg, + u32 data) +{ + ipmmu_write(domain->mmu, domain->context_id * IM_CTX_SIZE + reg, data); +} + +/* ----------------------------------------------------------------------------- + * TLB and microTLB Management + */ + +/* Wait for any pending TLB invalidations to complete */ +static void ipmmu_tlb_sync(struct ipmmu_vmsa_domain *domain) +{ + unsigned int count = 0; + + while (ipmmu_ctx_read(domain, IMCTR) & IMCTR_FLUSH) { + cpu_relax(); + if (++count == TLB_LOOP_TIMEOUT) { + dev_err_ratelimited(domain->mmu->dev, + "TLB sync timed out -- MMU may be deadlocked\n"); + return; + } + udelay(1); + } +} + +static void ipmmu_tlb_invalidate(struct ipmmu_vmsa_domain *domain) +{ + u32 reg; + + reg = ipmmu_ctx_read(domain, IMCTR); + reg |= IMCTR_FLUSH; + ipmmu_ctx_write(domain, IMCTR, reg); + + ipmmu_tlb_sync(domain); +} + +/* + * Enable MMU translation for the microTLB. + */ +static void ipmmu_utlb_enable(struct ipmmu_vmsa_domain *domain, + unsigned int utlb) +{ + struct ipmmu_vmsa_device *mmu = domain->mmu; + + /* + * TODO: Reference-count the microTLB as several bus masters can be + * connected to the same microTLB. + */ + + /* TODO: What should we set the ASID to ? */ + ipmmu_write(mmu, IMUASID(utlb), 0); + /* TODO: Do we need to flush the microTLB ? */ + ipmmu_write(mmu, IMUCTR(utlb), + IMUCTR_TTSEL_MMU(domain->context_id) | IMUCTR_FLUSH | + IMUCTR_MMUEN); +} + +/* + * Disable MMU translation for the microTLB. + */ +static void ipmmu_utlb_disable(struct ipmmu_vmsa_domain *domain, + unsigned int utlb) +{ + struct ipmmu_vmsa_device *mmu = domain->mmu; + + ipmmu_write(mmu, IMUCTR(utlb), 0); +} + +static void ipmmu_flush_pgtable(struct ipmmu_vmsa_device *mmu, void *addr, + size_t size) +{ + unsigned long offset = (unsigned long)addr & ~PAGE_MASK; + + /* + * TODO: Add support for coherent walk through CCI with DVM and remove + * cache handling. + */ + dma_map_page(mmu->dev, virt_to_page(addr), offset, size, DMA_TO_DEVICE); +} + +/* ----------------------------------------------------------------------------- + * Domain/Context Management + */ + +static int ipmmu_domain_init_context(struct ipmmu_vmsa_domain *domain) +{ + phys_addr_t ttbr; + u32 reg; + + /* + * TODO: When adding support for multiple contexts, find an unused + * context. + */ + domain->context_id = 0; + + /* TTBR0 */ + ipmmu_flush_pgtable(domain->mmu, domain->pgd, + IPMMU_PTRS_PER_PGD * sizeof(*domain->pgd)); + ttbr = __pa(domain->pgd); + ipmmu_ctx_write(domain, IMTTLBR0, ttbr); + ipmmu_ctx_write(domain, IMTTUBR0, ttbr >> 32); + + /* + * TTBCR + * We use long descriptors with inner-shareable WBWA tables and allocate + * the whole 32-bit VA space to TTBR0. + */ + ipmmu_ctx_write(domain, IMTTBCR, IMTTBCR_EAE | + IMTTBCR_SH0_INNER_SHAREABLE | IMTTBCR_ORGN0_WB_WA | + IMTTBCR_IRGN0_WB_WA | IMTTBCR_SL0_LVL_1); + + /* + * MAIR0 + * We need three attributes only, non-cacheable, write-back read/write + * allocate and device memory. + */ + reg = (IMMAIR_ATTR_NC << IMMAIR_ATTR_SHIFT(IMMAIR_ATTR_IDX_NC)) + | (IMMAIR_ATTR_WBRWA << IMMAIR_ATTR_SHIFT(IMMAIR_ATTR_IDX_WBRWA)) + | (IMMAIR_ATTR_DEVICE << IMMAIR_ATTR_SHIFT(IMMAIR_ATTR_IDX_DEV)); + ipmmu_ctx_write(domain, IMMAIR0, reg); + + /* IMBUSCR */ + ipmmu_ctx_write(domain, IMBUSCR, + ipmmu_ctx_read(domain, IMBUSCR) & + ~(IMBUSCR_DVM | IMBUSCR_BUSSEL_MASK)); + + /* + * IMSTR + * Clear all interrupt flags. + */ + ipmmu_ctx_write(domain, IMSTR, ipmmu_ctx_read(domain, IMSTR)); + + /* + * IMCTR + * Enable the MMU and interrupt generation. The long-descriptor + * translation table format doesn't use TEX remapping. Don't enable AF + * software management as we have no use for it. Flush the TLB as + * required when modifying the context registers. + */ + ipmmu_ctx_write(domain, IMCTR, IMCTR_INTEN | IMCTR_FLUSH | IMCTR_MMUEN); + + return 0; +} + +static void ipmmu_domain_destroy_context(struct ipmmu_vmsa_domain *domain) +{ + /* + * Disable the context. Flush the TLB as required when modifying the + * context registers. + * + * TODO: Is TLB flush really needed ? + */ + ipmmu_ctx_write(domain, IMCTR, IMCTR_FLUSH); + ipmmu_tlb_sync(domain); +} + +/* ----------------------------------------------------------------------------- + * Fault Handling + */ + +static irqreturn_t ipmmu_domain_irq(struct ipmmu_vmsa_domain *domain) +{ + const u32 err_mask = IMSTR_MHIT | IMSTR_ABORT | IMSTR_PF | IMSTR_TF; + struct ipmmu_vmsa_device *mmu = domain->mmu; + u32 status; + u32 iova; + + status = ipmmu_ctx_read(domain, IMSTR); + if (!(status & err_mask)) + return IRQ_NONE; + + iova = ipmmu_ctx_read(domain, IMEAR); + + /* + * Clear the error status flags. Unlike traditional interrupt flag + * registers that must be cleared by writing 1, this status register + * seems to require 0. The error address register must be read before, + * otherwise its value will be 0. + */ + ipmmu_ctx_write(domain, IMSTR, 0); + + /* Log fatal errors. */ + if (status & IMSTR_MHIT) + dev_err_ratelimited(mmu->dev, "Multiple TLB hits @0x%08x\n", + iova); + if (status & IMSTR_ABORT) + dev_err_ratelimited(mmu->dev, "Page Table Walk Abort @0x%08x\n", + iova); + + if (!(status & (IMSTR_PF | IMSTR_TF))) + return IRQ_NONE; + + /* + * Try to handle page faults and translation faults. + * + * TODO: We need to look up the faulty device based on the I/O VA. Use + * the IOMMU device for now. + */ + if (!report_iommu_fault(domain->io_domain, mmu->dev, iova, 0)) + return IRQ_HANDLED; + + dev_err_ratelimited(mmu->dev, + "Unhandled fault: status 0x%08x iova 0x%08x\n", + status, iova); + + return IRQ_HANDLED; +} + +static irqreturn_t ipmmu_irq(int irq, void *dev) +{ + struct ipmmu_vmsa_device *mmu = dev; + struct iommu_domain *io_domain; + struct ipmmu_vmsa_domain *domain; + + if (!mmu->mapping) + return IRQ_NONE; + + io_domain = mmu->mapping->domain; + domain = io_domain->priv; + + return ipmmu_domain_irq(domain); +} + +/* ----------------------------------------------------------------------------- + * Page Table Management + */ + +#define pud_pgtable(pud) pfn_to_page(__phys_to_pfn(pud_val(pud) & PHYS_MASK)) + +static void ipmmu_free_ptes(pmd_t *pmd) +{ + pgtable_t table = pmd_pgtable(*pmd); + __free_page(table); +} + +static void ipmmu_free_pmds(pud_t *pud) +{ + pmd_t *pmd = pmd_offset(pud, 0); + pgtable_t table; + unsigned int i; + + for (i = 0; i < IPMMU_PTRS_PER_PMD; ++i) { + if (!pmd_table(*pmd)) + continue; + + ipmmu_free_ptes(pmd); + pmd++; + } + + table = pud_pgtable(*pud); + __free_page(table); +} + +static void ipmmu_free_pgtables(struct ipmmu_vmsa_domain *domain) +{ + pgd_t *pgd, *pgd_base = domain->pgd; + unsigned int i; + + /* + * Recursively free the page tables for this domain. We don't care about + * speculative TLB filling, because the TLB will be nuked next time this + * context bank is re-allocated and no devices currently map to these + * tables. + */ + pgd = pgd_base; + for (i = 0; i < IPMMU_PTRS_PER_PGD; ++i) { + if (pgd_none(*pgd)) + continue; + ipmmu_free_pmds((pud_t *)pgd); + pgd++; + } + + kfree(pgd_base); +} + +/* + * We can't use the (pgd|pud|pmd|pte)_populate or the set_(pgd|pud|pmd|pte) + * functions as they would flush the CPU TLB. + */ + +static pte_t *ipmmu_alloc_pte(struct ipmmu_vmsa_device *mmu, pmd_t *pmd, + unsigned long iova) +{ + pte_t *pte; + + if (!pmd_none(*pmd)) + return pte_offset_kernel(pmd, iova); + + pte = (pte_t *)get_zeroed_page(GFP_ATOMIC); + if (!pte) + return NULL; + + ipmmu_flush_pgtable(mmu, pte, PAGE_SIZE); + *pmd = __pmd(__pa(pte) | PMD_NSTABLE | PMD_TYPE_TABLE); + ipmmu_flush_pgtable(mmu, pmd, sizeof(*pmd)); + + return pte + pte_index(iova); +} + +static pmd_t *ipmmu_alloc_pmd(struct ipmmu_vmsa_device *mmu, pgd_t *pgd, + unsigned long iova) +{ + pud_t *pud = (pud_t *)pgd; + pmd_t *pmd; + + if (!pud_none(*pud)) + return pmd_offset(pud, iova); + + pmd = (pmd_t *)get_zeroed_page(GFP_ATOMIC); + if (!pmd) + return NULL; + + ipmmu_flush_pgtable(mmu, pmd, PAGE_SIZE); + *pud = __pud(__pa(pmd) | PMD_NSTABLE | PMD_TYPE_TABLE); + ipmmu_flush_pgtable(mmu, pud, sizeof(*pud)); + + return pmd + pmd_index(iova); +} + +static u64 ipmmu_page_prot(unsigned int prot, u64 type) +{ + u64 pgprot = ARM_VMSA_PTE_XN | ARM_VMSA_PTE_nG | ARM_VMSA_PTE_AF + | ARM_VMSA_PTE_SH_IS | ARM_VMSA_PTE_AP_UNPRIV + | ARM_VMSA_PTE_NS | type; + + if (!(prot & IOMMU_WRITE) && (prot & IOMMU_READ)) + pgprot |= ARM_VMSA_PTE_AP_RDONLY; + + if (prot & IOMMU_CACHE) + pgprot |= IMMAIR_ATTR_IDX_WBRWA << ARM_VMSA_PTE_ATTRINDX_SHIFT; + + if (prot & IOMMU_EXEC) + pgprot &= ~ARM_VMSA_PTE_XN; + else if (!(prot & (IOMMU_READ | IOMMU_WRITE))) + /* If no access create a faulting entry to avoid TLB fills. */ + pgprot &= ~ARM_VMSA_PTE_PAGE; + + return pgprot; +} + +static int ipmmu_alloc_init_pte(struct ipmmu_vmsa_device *mmu, pmd_t *pmd, + unsigned long iova, unsigned long pfn, + size_t size, int prot) +{ + pteval_t pteval = ipmmu_page_prot(prot, ARM_VMSA_PTE_PAGE); + unsigned int num_ptes = 1; + pte_t *pte, *start; + unsigned int i; + + pte = ipmmu_alloc_pte(mmu, pmd, iova); + if (!pte) + return -ENOMEM; + + start = pte; + + /* + * Install the page table entries. We can be called both for a single + * page or for a block of 16 physically contiguous pages. In the latter + * case set the PTE contiguous hint. + */ + if (size == SZ_64K) { + pteval |= ARM_VMSA_PTE_CONT; + num_ptes = ARM_VMSA_PTE_CONT_ENTRIES; + } + + for (i = num_ptes; i; --i) + *pte++ = pfn_pte(pfn++, __pgprot(pteval)); + + ipmmu_flush_pgtable(mmu, start, sizeof(*pte) * num_ptes); + + return 0; +} + +static int ipmmu_alloc_init_pmd(struct ipmmu_vmsa_device *mmu, pmd_t *pmd, + unsigned long iova, unsigned long pfn, + int prot) +{ + pmdval_t pmdval = ipmmu_page_prot(prot, PMD_TYPE_SECT); + + *pmd = pfn_pmd(pfn, __pgprot(pmdval)); + ipmmu_flush_pgtable(mmu, pmd, sizeof(*pmd)); + + return 0; +} + +static int ipmmu_create_mapping(struct ipmmu_vmsa_domain *domain, + unsigned long iova, phys_addr_t paddr, + size_t size, int prot) +{ + struct ipmmu_vmsa_device *mmu = domain->mmu; + pgd_t *pgd = domain->pgd; + unsigned long flags; + unsigned long pfn; + pmd_t *pmd; + int ret; + + if (!pgd) + return -EINVAL; + + if (size & ~PAGE_MASK) + return -EINVAL; + + if (paddr & ~((1ULL << 40) - 1)) + return -ERANGE; + + pfn = __phys_to_pfn(paddr); + pgd += pgd_index(iova); + + /* Update the page tables. */ + spin_lock_irqsave(&domain->lock, flags); + + pmd = ipmmu_alloc_pmd(mmu, pgd, iova); + if (!pmd) { + ret = -ENOMEM; + goto done; + } + + switch (size) { + case SZ_2M: + ret = ipmmu_alloc_init_pmd(mmu, pmd, iova, pfn, prot); + break; + case SZ_64K: + case SZ_4K: + ret = ipmmu_alloc_init_pte(mmu, pmd, iova, pfn, size, prot); + break; + default: + ret = -EINVAL; + break; + } + +done: + spin_unlock_irqrestore(&domain->lock, flags); + + if (!ret) + ipmmu_tlb_invalidate(domain); + + return ret; +} + +static void ipmmu_clear_pud(struct ipmmu_vmsa_device *mmu, pud_t *pud) +{ + /* Free the page table. */ + pgtable_t table = pud_pgtable(*pud); + __free_page(table); + + /* Clear the PUD. */ + *pud = __pud(0); + ipmmu_flush_pgtable(mmu, pud, sizeof(*pud)); +} + +static void ipmmu_clear_pmd(struct ipmmu_vmsa_device *mmu, pud_t *pud, + pmd_t *pmd) +{ + unsigned int i; + + /* Free the page table. */ + if (pmd_table(*pmd)) { + pgtable_t table = pmd_pgtable(*pmd); + __free_page(table); + } + + /* Clear the PMD. */ + *pmd = __pmd(0); + ipmmu_flush_pgtable(mmu, pmd, sizeof(*pmd)); + + /* Check whether the PUD is still needed. */ + pmd = pmd_offset(pud, 0); + for (i = 0; i < IPMMU_PTRS_PER_PMD; ++i) { + if (!pmd_none(pmd[i])) + return; + } + + /* Clear the parent PUD. */ + ipmmu_clear_pud(mmu, pud); +} + +static void ipmmu_clear_pte(struct ipmmu_vmsa_device *mmu, pud_t *pud, + pmd_t *pmd, pte_t *pte, unsigned int num_ptes) +{ + unsigned int i; + + /* Clear the PTE. */ + for (i = num_ptes; i; --i) + pte[i-1] = __pte(0); + + ipmmu_flush_pgtable(mmu, pte, sizeof(*pte) * num_ptes); + + /* Check whether the PMD is still needed. */ + pte = pte_offset_kernel(pmd, 0); + for (i = 0; i < IPMMU_PTRS_PER_PTE; ++i) { + if (!pte_none(pte[i])) + return; + } + + /* Clear the parent PMD. */ + ipmmu_clear_pmd(mmu, pud, pmd); +} + +static int ipmmu_split_pmd(struct ipmmu_vmsa_device *mmu, pmd_t *pmd) +{ + pte_t *pte, *start; + pteval_t pteval; + unsigned long pfn; + unsigned int i; + + pte = (pte_t *)get_zeroed_page(GFP_ATOMIC); + if (!pte) + return -ENOMEM; + + /* Copy the PMD attributes. */ + pteval = (pmd_val(*pmd) & ARM_VMSA_PTE_ATTRS_MASK) + | ARM_VMSA_PTE_CONT | ARM_VMSA_PTE_PAGE; + + pfn = pmd_pfn(*pmd); + start = pte; + + for (i = IPMMU_PTRS_PER_PTE; i; --i) + *pte++ = pfn_pte(pfn++, __pgprot(pteval)); + + ipmmu_flush_pgtable(mmu, start, PAGE_SIZE); + *pmd = __pmd(__pa(start) | PMD_NSTABLE | PMD_TYPE_TABLE); + ipmmu_flush_pgtable(mmu, pmd, sizeof(*pmd)); + + return 0; +} + +static void ipmmu_split_pte(struct ipmmu_vmsa_device *mmu, pte_t *pte) +{ + unsigned int i; + + for (i = ARM_VMSA_PTE_CONT_ENTRIES; i; --i) + pte[i-1] = __pte(pte_val(*pte) & ~ARM_VMSA_PTE_CONT); + + ipmmu_flush_pgtable(mmu, pte, sizeof(*pte) * ARM_VMSA_PTE_CONT_ENTRIES); +} + +static int ipmmu_clear_mapping(struct ipmmu_vmsa_domain *domain, + unsigned long iova, size_t size) +{ + struct ipmmu_vmsa_device *mmu = domain->mmu; + unsigned long flags; + pgd_t *pgd = domain->pgd; + pud_t *pud; + pmd_t *pmd; + pte_t *pte; + int ret = 0; + + if (!pgd) + return -EINVAL; + + if (size & ~PAGE_MASK) + return -EINVAL; + + pgd += pgd_index(iova); + pud = (pud_t *)pgd; + + spin_lock_irqsave(&domain->lock, flags); + + /* If there's no PUD or PMD we're done. */ + if (pud_none(*pud)) + goto done; + + pmd = pmd_offset(pud, iova); + if (pmd_none(*pmd)) + goto done; + + /* + * When freeing a 2MB block just clear the PMD. In the unlikely case the + * block is mapped as individual pages this will free the corresponding + * PTE page table. + */ + if (size == SZ_2M) { + ipmmu_clear_pmd(mmu, pud, pmd); + goto done; + } + + /* + * If the PMD has been mapped as a section remap it as pages to allow + * freeing individual pages. + */ + if (pmd_sect(*pmd)) + ipmmu_split_pmd(mmu, pmd); + + pte = pte_offset_kernel(pmd, iova); + + /* + * When freeing a 64kB block just clear the PTE entries. We don't have + * to care about the contiguous hint of the surrounding entries. + */ + if (size == SZ_64K) { + ipmmu_clear_pte(mmu, pud, pmd, pte, ARM_VMSA_PTE_CONT_ENTRIES); + goto done; + } + + /* + * If the PTE has been mapped with the contiguous hint set remap it and + * its surrounding PTEs to allow unmapping a single page. + */ + if (pte_val(*pte) & ARM_VMSA_PTE_CONT) + ipmmu_split_pte(mmu, pte); + + /* Clear the PTE. */ + ipmmu_clear_pte(mmu, pud, pmd, pte, 1); + +done: + spin_unlock_irqrestore(&domain->lock, flags); + + if (ret) + ipmmu_tlb_invalidate(domain); + + return 0; +} + +/* ----------------------------------------------------------------------------- + * IOMMU Operations + */ + +static int ipmmu_domain_init(struct iommu_domain *io_domain) +{ + struct ipmmu_vmsa_domain *domain; + + domain = kzalloc(sizeof(*domain), GFP_KERNEL); + if (!domain) + return -ENOMEM; + + spin_lock_init(&domain->lock); + + domain->pgd = kzalloc(IPMMU_PTRS_PER_PGD * sizeof(pgd_t), GFP_KERNEL); + if (!domain->pgd) { + kfree(domain); + return -ENOMEM; + } + + io_domain->priv = domain; + domain->io_domain = io_domain; + + return 0; +} + +static void ipmmu_domain_destroy(struct iommu_domain *io_domain) +{ + struct ipmmu_vmsa_domain *domain = io_domain->priv; + + /* + * Free the domain resources. We assume that all devices have already + * been detached. + */ + ipmmu_domain_destroy_context(domain); + ipmmu_free_pgtables(domain); + kfree(domain); +} + +static int ipmmu_attach_device(struct iommu_domain *io_domain, + struct device *dev) +{ + struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu; + struct ipmmu_vmsa_device *mmu = archdata->mmu; + struct ipmmu_vmsa_domain *domain = io_domain->priv; + unsigned long flags; + int ret = 0; + + if (!mmu) { + dev_err(dev, "Cannot attach to IPMMU\n"); + return -ENXIO; + } + + spin_lock_irqsave(&domain->lock, flags); + + if (!domain->mmu) { + /* The domain hasn't been used yet, initialize it. */ + domain->mmu = mmu; + ret = ipmmu_domain_init_context(domain); + } else if (domain->mmu != mmu) { + /* + * Something is wrong, we can't attach two devices using + * different IOMMUs to the same domain. + */ + dev_err(dev, "Can't attach IPMMU %s to domain on IPMMU %s\n", + dev_name(mmu->dev), dev_name(domain->mmu->dev)); + ret = -EINVAL; + } + + spin_unlock_irqrestore(&domain->lock, flags); + + if (ret < 0) + return ret; + + ipmmu_utlb_enable(domain, archdata->utlb); + + return 0; +} + +static void ipmmu_detach_device(struct iommu_domain *io_domain, + struct device *dev) +{ + struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu; + struct ipmmu_vmsa_domain *domain = io_domain->priv; + + ipmmu_utlb_disable(domain, archdata->utlb); + + /* + * TODO: Optimize by disabling the context when no device is attached. + */ +} + +static int ipmmu_map(struct iommu_domain *io_domain, unsigned long iova, + phys_addr_t paddr, size_t size, int prot) +{ + struct ipmmu_vmsa_domain *domain = io_domain->priv; + + if (!domain) + return -ENODEV; + + return ipmmu_create_mapping(domain, iova, paddr, size, prot); +} + +static size_t ipmmu_unmap(struct iommu_domain *io_domain, unsigned long iova, + size_t size) +{ + struct ipmmu_vmsa_domain *domain = io_domain->priv; + int ret; + + ret = ipmmu_clear_mapping(domain, iova, size); + return ret ? 0 : size; +} + +static phys_addr_t ipmmu_iova_to_phys(struct iommu_domain *io_domain, + dma_addr_t iova) +{ + struct ipmmu_vmsa_domain *domain = io_domain->priv; + pgd_t pgd; + pud_t pud; + pmd_t pmd; + pte_t pte; + + /* TODO: Is locking needed ? */ + + if (!domain->pgd) + return 0; + + pgd = *(domain->pgd + pgd_index(iova)); + if (pgd_none(pgd)) + return 0; + + pud = *pud_offset(&pgd, iova); + if (pud_none(pud)) + return 0; + + pmd = *pmd_offset(&pud, iova); + if (pmd_none(pmd)) + return 0; + + if (pmd_sect(pmd)) + return __pfn_to_phys(pmd_pfn(pmd)) | (iova & ~PMD_MASK); + + pte = *(pmd_page_vaddr(pmd) + pte_index(iova)); + if (pte_none(pte)) + return 0; + + return __pfn_to_phys(pte_pfn(pte)) | (iova & ~PAGE_MASK); +} + +static int ipmmu_find_utlb(struct ipmmu_vmsa_device *mmu, struct device *dev) +{ + const struct ipmmu_vmsa_master *master = mmu->pdata->masters; + const char *devname = dev_name(dev); + unsigned int i; + + for (i = 0; i < mmu->pdata->num_masters; ++i, ++master) { + if (strcmp(master->name, devname) == 0) + return master->utlb; + } + + return -1; +} + +static int ipmmu_add_device(struct device *dev) +{ + struct ipmmu_vmsa_archdata *archdata; + struct ipmmu_vmsa_device *mmu; + struct iommu_group *group; + int utlb = -1; + int ret; + + if (dev->archdata.iommu) { + dev_warn(dev, "IOMMU driver already assigned to device %s\n", + dev_name(dev)); + return -EINVAL; + } + + /* Find the master corresponding to the device. */ + spin_lock(&ipmmu_devices_lock); + + list_for_each_entry(mmu, &ipmmu_devices, list) { + utlb = ipmmu_find_utlb(mmu, dev); + if (utlb >= 0) { + /* + * TODO Take a reference to the MMU to protect + * against device removal. + */ + break; + } + } + + spin_unlock(&ipmmu_devices_lock); + + if (utlb < 0) + return -ENODEV; + + if (utlb >= mmu->num_utlbs) + return -EINVAL; + + /* Create a device group and add the device to it. */ + group = iommu_group_alloc(); + if (IS_ERR(group)) { + dev_err(dev, "Failed to allocate IOMMU group\n"); + return PTR_ERR(group); + } + + ret = iommu_group_add_device(group, dev); + iommu_group_put(group); + + if (ret < 0) { + dev_err(dev, "Failed to add device to IPMMU group\n"); + return ret; + } + + archdata = kzalloc(sizeof(*archdata), GFP_KERNEL); + if (!archdata) { + ret = -ENOMEM; + goto error; + } + + archdata->mmu = mmu; + archdata->utlb = utlb; + dev->archdata.iommu = archdata; + + /* + * Create the ARM mapping, used by the ARM DMA mapping core to allocate + * VAs. This will allocate a corresponding IOMMU domain. + * + * TODO: + * - Create one mapping per context (TLB). + * - Make the mapping size configurable ? We currently use a 2GB mapping + * at a 1GB offset to ensure that NULL VAs will fault. + */ + if (!mmu->mapping) { + struct dma_iommu_mapping *mapping; + + mapping = arm_iommu_create_mapping(&platform_bus_type, + SZ_1G, SZ_2G); + if (IS_ERR(mapping)) { + dev_err(mmu->dev, "failed to create ARM IOMMU mapping\n"); + return PTR_ERR(mapping); + } + + mmu->mapping = mapping; + } + + /* Attach the ARM VA mapping to the device. */ + ret = arm_iommu_attach_device(dev, mmu->mapping); + if (ret < 0) { + dev_err(dev, "Failed to attach device to VA mapping\n"); + goto error; + } + + return 0; + +error: + kfree(dev->archdata.iommu); + dev->archdata.iommu = NULL; + iommu_group_remove_device(dev); + return ret; +} + +static void ipmmu_remove_device(struct device *dev) +{ + arm_iommu_detach_device(dev); + iommu_group_remove_device(dev); + kfree(dev->archdata.iommu); + dev->archdata.iommu = NULL; +} + +static struct iommu_ops ipmmu_ops = { + .domain_init = ipmmu_domain_init, + .domain_destroy = ipmmu_domain_destroy, + .attach_dev = ipmmu_attach_device, + .detach_dev = ipmmu_detach_device, + .map = ipmmu_map, + .unmap = ipmmu_unmap, + .iova_to_phys = ipmmu_iova_to_phys, + .add_device = ipmmu_add_device, + .remove_device = ipmmu_remove_device, + .pgsize_bitmap = SZ_2M | SZ_64K | SZ_4K, +}; + +/* ----------------------------------------------------------------------------- + * Probe/remove and init + */ + +static void ipmmu_device_reset(struct ipmmu_vmsa_device *mmu) +{ + unsigned int i; + + /* Disable all contexts. */ + for (i = 0; i < 4; ++i) + ipmmu_write(mmu, i * IM_CTX_SIZE + IMCTR, 0); +} + +static int ipmmu_probe(struct platform_device *pdev) +{ + struct ipmmu_vmsa_device *mmu; + struct resource *res; + int irq; + int ret; + + if (!pdev->dev.platform_data) { + dev_err(&pdev->dev, "missing platform data\n"); + return -EINVAL; + } + + mmu = devm_kzalloc(&pdev->dev, sizeof(*mmu), GFP_KERNEL); + if (!mmu) { + dev_err(&pdev->dev, "cannot allocate device data\n"); + return -ENOMEM; + } + + mmu->dev = &pdev->dev; + mmu->pdata = pdev->dev.platform_data; + mmu->num_utlbs = 32; + + /* Map I/O memory and request IRQ. */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mmu->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(mmu->base)) + return PTR_ERR(mmu->base); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "no IRQ found\n"); + return irq; + } + + ret = devm_request_irq(&pdev->dev, irq, ipmmu_irq, 0, + dev_name(&pdev->dev), mmu); + if (ret < 0) { + dev_err(&pdev->dev, "failed to request IRQ %d\n", irq); + return irq; + } + + ipmmu_device_reset(mmu); + + /* + * We can't create the ARM mapping here as it requires the bus to have + * an IOMMU, which only happens when bus_set_iommu() is called in + * ipmmu_init() after the probe function returns. + */ + + spin_lock(&ipmmu_devices_lock); + list_add(&mmu->list, &ipmmu_devices); + spin_unlock(&ipmmu_devices_lock); + + platform_set_drvdata(pdev, mmu); + + return 0; +} + +static int ipmmu_remove(struct platform_device *pdev) +{ + struct ipmmu_vmsa_device *mmu = platform_get_drvdata(pdev); + + spin_lock(&ipmmu_devices_lock); + list_del(&mmu->list); + spin_unlock(&ipmmu_devices_lock); + + arm_iommu_release_mapping(mmu->mapping); + + ipmmu_device_reset(mmu); + + return 0; +} + +static struct platform_driver ipmmu_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "ipmmu-vmsa", + }, + .probe = ipmmu_probe, + .remove = ipmmu_remove, +}; + +static int __init ipmmu_init(void) +{ + int ret; + + ret = platform_driver_register(&ipmmu_driver); + if (ret < 0) + return ret; + + if (!iommu_present(&platform_bus_type)) + bus_set_iommu(&platform_bus_type, &ipmmu_ops); + + return 0; +} + +static void __exit ipmmu_exit(void) +{ + return platform_driver_unregister(&ipmmu_driver); +} + +subsys_initcall(ipmmu_init); +module_exit(ipmmu_exit); + +MODULE_DESCRIPTION("IOMMU API for Renesas VMSA-compatible IPMMU"); +MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c index faf85d6e33f..33c43952408 100644 --- a/drivers/iommu/irq_remapping.c +++ b/drivers/iommu/irq_remapping.c @@ -1,22 +1,175 @@ +#include <linux/seq_file.h> +#include <linux/cpumask.h> #include <linux/kernel.h> #include <linux/string.h> -#include <linux/cpumask.h> #include <linux/errno.h> #include <linux/msi.h> +#include <linux/irq.h> +#include <linux/pci.h> #include <asm/hw_irq.h> #include <asm/irq_remapping.h> +#include <asm/processor.h> +#include <asm/x86_init.h> +#include <asm/apic.h> #include "irq_remapping.h" int irq_remapping_enabled; int disable_irq_remap; +int irq_remap_broken; int disable_sourceid_checking; int no_x2apic_optout; static struct irq_remap_ops *remap_ops; +static int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec); +static int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq, + int index, int sub_handle); +static int set_remapped_irq_affinity(struct irq_data *data, + const struct cpumask *mask, + bool force); + +static bool irq_remapped(struct irq_cfg *cfg) +{ + return (cfg->remapped == 1); +} + +static void irq_remapping_disable_io_apic(void) +{ + /* + * With interrupt-remapping, for now we will use virtual wire A + * mode, as virtual wire B is little complex (need to configure + * both IOAPIC RTE as well as interrupt-remapping table entry). + * As this gets called during crash dump, keep this simple for + * now. + */ + if (cpu_has_apic || apic_from_smp_config()) + disconnect_bsp_APIC(0); +} + +static int do_setup_msi_irqs(struct pci_dev *dev, int nvec) +{ + int ret, sub_handle, nvec_pow2, index = 0; + unsigned int irq; + struct msi_desc *msidesc; + + WARN_ON(!list_is_singular(&dev->msi_list)); + msidesc = list_entry(dev->msi_list.next, struct msi_desc, list); + WARN_ON(msidesc->irq); + WARN_ON(msidesc->msi_attrib.multiple); + WARN_ON(msidesc->nvec_used); + + irq = irq_alloc_hwirqs(nvec, dev_to_node(&dev->dev)); + if (irq == 0) + return -ENOSPC; + + nvec_pow2 = __roundup_pow_of_two(nvec); + msidesc->nvec_used = nvec; + msidesc->msi_attrib.multiple = ilog2(nvec_pow2); + for (sub_handle = 0; sub_handle < nvec; sub_handle++) { + if (!sub_handle) { + index = msi_alloc_remapped_irq(dev, irq, nvec_pow2); + if (index < 0) { + ret = index; + goto error; + } + } else { + ret = msi_setup_remapped_irq(dev, irq + sub_handle, + index, sub_handle); + if (ret < 0) + goto error; + } + ret = setup_msi_irq(dev, msidesc, irq, sub_handle); + if (ret < 0) + goto error; + } + return 0; + +error: + irq_free_hwirqs(irq, nvec); + + /* + * Restore altered MSI descriptor fields and prevent just destroyed + * IRQs from tearing down again in default_teardown_msi_irqs() + */ + msidesc->irq = 0; + msidesc->nvec_used = 0; + msidesc->msi_attrib.multiple = 0; + + return ret; +} + +static int do_setup_msix_irqs(struct pci_dev *dev, int nvec) +{ + int node, ret, sub_handle, index = 0; + struct msi_desc *msidesc; + unsigned int irq; + + node = dev_to_node(&dev->dev); + sub_handle = 0; + + list_for_each_entry(msidesc, &dev->msi_list, list) { + + irq = irq_alloc_hwirq(node); + if (irq == 0) + return -1; + + if (sub_handle == 0) + ret = index = msi_alloc_remapped_irq(dev, irq, nvec); + else + ret = msi_setup_remapped_irq(dev, irq, index, sub_handle); + + if (ret < 0) + goto error; + + ret = setup_msi_irq(dev, msidesc, irq, 0); + if (ret < 0) + goto error; + + sub_handle += 1; + irq += 1; + } + + return 0; + +error: + irq_free_hwirq(irq); + return ret; +} + +static int irq_remapping_setup_msi_irqs(struct pci_dev *dev, + int nvec, int type) +{ + if (type == PCI_CAP_ID_MSI) + return do_setup_msi_irqs(dev, nvec); + else + return do_setup_msix_irqs(dev, nvec); +} + +static void eoi_ioapic_pin_remapped(int apic, int pin, int vector) +{ + /* + * Intr-remapping uses pin number as the virtual vector + * in the RTE. Actual vector is programmed in + * intr-remapping table entry. Hence for the io-apic + * EOI we use the pin number. + */ + io_apic_eoi(apic, pin); +} + +static void __init irq_remapping_modify_x86_ops(void) +{ + x86_io_apic_ops.disable = irq_remapping_disable_io_apic; + x86_io_apic_ops.set_affinity = set_remapped_irq_affinity; + x86_io_apic_ops.setup_entry = setup_ioapic_remapped_entry; + x86_io_apic_ops.eoi_ioapic_pin = eoi_ioapic_pin_remapped; + x86_msi.setup_msi_irqs = irq_remapping_setup_msi_irqs; + x86_msi.setup_hpet_msi = setup_hpet_msi_remapped; + x86_msi.compose_msi_msg = compose_remapped_msi_msg; +} + static __init int setup_nointremap(char *str) { disable_irq_remap = 1; @@ -58,6 +211,11 @@ void __init setup_irq_remapping_ops(void) #endif } +void set_irq_remapping_broken(void) +{ + irq_remap_broken = 1; +} + int irq_remapping_supported(void) { if (disable_irq_remap) @@ -79,15 +237,24 @@ int __init irq_remapping_prepare(void) int __init irq_remapping_enable(void) { + int ret; + if (!remap_ops || !remap_ops->enable) return -ENODEV; - return remap_ops->enable(); + ret = remap_ops->enable(); + + if (irq_remapping_enabled) + irq_remapping_modify_x86_ops(); + + return ret; } void irq_remapping_disable(void) { - if (!remap_ops || !remap_ops->disable) + if (!irq_remapping_enabled || + !remap_ops || + !remap_ops->disable) return; remap_ops->disable(); @@ -95,7 +262,9 @@ void irq_remapping_disable(void) int irq_remapping_reenable(int mode) { - if (!remap_ops || !remap_ops->reenable) + if (!irq_remapping_enabled || + !remap_ops || + !remap_ops->reenable) return 0; return remap_ops->reenable(mode); @@ -103,6 +272,9 @@ int irq_remapping_reenable(int mode) int __init irq_remap_enable_fault_handling(void) { + if (!irq_remapping_enabled) + return 0; + if (!remap_ops || !remap_ops->enable_faulting) return -ENODEV; @@ -121,8 +293,8 @@ int setup_ioapic_remapped_entry(int irq, vector, attr); } -int set_remapped_irq_affinity(struct irq_data *data, const struct cpumask *mask, - bool force) +static int set_remapped_irq_affinity(struct irq_data *data, + const struct cpumask *mask, bool force) { if (!config_enabled(CONFIG_SMP) || !remap_ops || !remap_ops->set_affinity) @@ -133,23 +305,28 @@ int set_remapped_irq_affinity(struct irq_data *data, const struct cpumask *mask, void free_remapped_irq(int irq) { + struct irq_cfg *cfg = irq_get_chip_data(irq); + if (!remap_ops || !remap_ops->free_irq) return; - remap_ops->free_irq(irq); + if (irq_remapped(cfg)) + remap_ops->free_irq(irq); } void compose_remapped_msi_msg(struct pci_dev *pdev, unsigned int irq, unsigned int dest, struct msi_msg *msg, u8 hpet_id) { - if (!remap_ops || !remap_ops->compose_msi_msg) - return; + struct irq_cfg *cfg = irq_get_chip_data(irq); - remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id); + if (!irq_remapped(cfg)) + native_compose_msi_msg(pdev, irq, dest, msg, hpet_id); + else if (remap_ops && remap_ops->compose_msi_msg) + remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id); } -int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec) +static int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec) { if (!remap_ops || !remap_ops->msi_alloc_irq) return -ENODEV; @@ -157,8 +334,8 @@ int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec) return remap_ops->msi_alloc_irq(pdev, irq, nvec); } -int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq, - int index, int sub_handle) +static int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq, + int index, int sub_handle) { if (!remap_ops || !remap_ops->msi_setup_irq) return -ENODEV; @@ -173,3 +350,42 @@ int setup_hpet_msi_remapped(unsigned int irq, unsigned int id) return remap_ops->setup_hpet_msi(irq, id); } + +void panic_if_irq_remap(const char *msg) +{ + if (irq_remapping_enabled) + panic(msg); +} + +static void ir_ack_apic_edge(struct irq_data *data) +{ + ack_APIC_irq(); +} + +static void ir_ack_apic_level(struct irq_data *data) +{ + ack_APIC_irq(); + eoi_ioapic_irq(data->irq, data->chip_data); +} + +static void ir_print_prefix(struct irq_data *data, struct seq_file *p) +{ + seq_printf(p, " IR-%s", data->chip->name); +} + +void irq_remap_modify_chip_defaults(struct irq_chip *chip) +{ + chip->irq_print_chip = ir_print_prefix; + chip->irq_ack = ir_ack_apic_edge; + chip->irq_eoi = ir_ack_apic_level; + chip->irq_set_affinity = x86_io_apic_ops.set_affinity; +} + +bool setup_remapped_irq(int irq, struct irq_cfg *cfg, struct irq_chip *chip) +{ + if (!irq_remapped(cfg)) + return false; + irq_set_status_flags(irq, IRQ_MOVE_PCNTXT); + irq_remap_modify_chip_defaults(chip); + return true; +} diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h index 95363acb583..90c4dae5a46 100644 --- a/drivers/iommu/irq_remapping.h +++ b/drivers/iommu/irq_remapping.h @@ -32,8 +32,10 @@ struct pci_dev; struct msi_msg; extern int disable_irq_remap; +extern int irq_remap_broken; extern int disable_sourceid_checking; extern int no_x2apic_optout; +extern int irq_remapping_enabled; struct irq_remap_ops { /* Check whether Interrupt Remapping is supported */ @@ -88,6 +90,7 @@ extern struct irq_remap_ops amd_iommu_irq_ops; #define irq_remapping_enabled 0 #define disable_irq_remap 1 +#define irq_remap_broken 0 #endif /* CONFIG_IRQ_REMAP */ diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c index 6a8870a3166..f5ff657f49f 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c @@ -31,8 +31,8 @@ #include <asm/cacheflush.h> #include <asm/sizes.h> -#include <mach/iommu_hw-8xxx.h> -#include <mach/iommu.h> +#include "msm_iommu_hw-8xxx.h" +#include "msm_iommu.h" #define MRC(reg, processor, op1, crn, crm, op2) \ __asm__ __volatile__ ( \ @@ -554,7 +554,7 @@ fail: } static phys_addr_t msm_iommu_iova_to_phys(struct iommu_domain *domain, - unsigned long va) + dma_addr_t va) { struct msm_priv *priv; struct msm_iommu_drvdata *iommu_drvdata; diff --git a/drivers/iommu/msm_iommu.h b/drivers/iommu/msm_iommu.h new file mode 100644 index 00000000000..5c7c955e6d2 --- /dev/null +++ b/drivers/iommu/msm_iommu.h @@ -0,0 +1,120 @@ +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef MSM_IOMMU_H +#define MSM_IOMMU_H + +#include <linux/interrupt.h> +#include <linux/clk.h> + +/* Sharability attributes of MSM IOMMU mappings */ +#define MSM_IOMMU_ATTR_NON_SH 0x0 +#define MSM_IOMMU_ATTR_SH 0x4 + +/* Cacheability attributes of MSM IOMMU mappings */ +#define MSM_IOMMU_ATTR_NONCACHED 0x0 +#define MSM_IOMMU_ATTR_CACHED_WB_WA 0x1 +#define MSM_IOMMU_ATTR_CACHED_WB_NWA 0x2 +#define MSM_IOMMU_ATTR_CACHED_WT 0x3 + +/* Mask for the cache policy attribute */ +#define MSM_IOMMU_CP_MASK 0x03 + +/* Maximum number of Machine IDs that we are allowing to be mapped to the same + * context bank. The number of MIDs mapped to the same CB does not affect + * performance, but there is a practical limit on how many distinct MIDs may + * be present. These mappings are typically determined at design time and are + * not expected to change at run time. + */ +#define MAX_NUM_MIDS 32 + +/** + * struct msm_iommu_dev - a single IOMMU hardware instance + * name Human-readable name given to this IOMMU HW instance + * ncb Number of context banks present on this IOMMU HW instance + */ +struct msm_iommu_dev { + const char *name; + int ncb; +}; + +/** + * struct msm_iommu_ctx_dev - an IOMMU context bank instance + * name Human-readable name given to this context bank + * num Index of this context bank within the hardware + * mids List of Machine IDs that are to be mapped into this context + * bank, terminated by -1. The MID is a set of signals on the + * AXI bus that identifies the function associated with a specific + * memory request. (See ARM spec). + */ +struct msm_iommu_ctx_dev { + const char *name; + int num; + int mids[MAX_NUM_MIDS]; +}; + + +/** + * struct msm_iommu_drvdata - A single IOMMU hardware instance + * @base: IOMMU config port base address (VA) + * @ncb The number of contexts on this IOMMU + * @irq: Interrupt number + * @clk: The bus clock for this IOMMU hardware instance + * @pclk: The clock for the IOMMU bus interconnect + * + * A msm_iommu_drvdata holds the global driver data about a single piece + * of an IOMMU hardware instance. + */ +struct msm_iommu_drvdata { + void __iomem *base; + int irq; + int ncb; + struct clk *clk; + struct clk *pclk; +}; + +/** + * struct msm_iommu_ctx_drvdata - an IOMMU context bank instance + * @num: Hardware context number of this context + * @pdev: Platform device associated wit this HW instance + * @attached_elm: List element for domains to track which devices are + * attached to them + * + * A msm_iommu_ctx_drvdata holds the driver data for a single context bank + * within each IOMMU hardware instance + */ +struct msm_iommu_ctx_drvdata { + int num; + struct platform_device *pdev; + struct list_head attached_elm; +}; + +/* + * Look up an IOMMU context device by its context name. NULL if none found. + * Useful for testing and drivers that do not yet fully have IOMMU stuff in + * their platform devices. + */ +struct device *msm_iommu_get_ctx(const char *ctx_name); + +/* + * Interrupt handler for the IOMMU context fault interrupt. Hooking the + * interrupt is not supported in the API yet, but this will print an error + * message and dump useful IOMMU registers. + */ +irqreturn_t msm_iommu_fault_handler(int irq, void *dev_id); + +#endif diff --git a/drivers/iommu/msm_iommu_dev.c b/drivers/iommu/msm_iommu_dev.c index 8e8fb079852..61def7cb526 100644 --- a/drivers/iommu/msm_iommu_dev.c +++ b/drivers/iommu/msm_iommu_dev.c @@ -27,9 +27,8 @@ #include <linux/err.h> #include <linux/slab.h> -#include <mach/iommu_hw-8xxx.h> -#include <mach/iommu.h> -#include <mach/clk.h> +#include "msm_iommu_hw-8xxx.h" +#include "msm_iommu.h" struct iommu_ctx_iter_data { /* input */ @@ -128,13 +127,12 @@ static void msm_iommu_reset(void __iomem *base, int ncb) static int msm_iommu_probe(struct platform_device *pdev) { - struct resource *r, *r2; + struct resource *r; struct clk *iommu_clk; struct clk *iommu_pclk; struct msm_iommu_drvdata *drvdata; struct msm_iommu_dev *iommu_dev = pdev->dev.platform_data; void __iomem *regs_base; - resource_size_t len; int ret, irq, par; if (pdev->id == -1) { @@ -160,7 +158,7 @@ static int msm_iommu_probe(struct platform_device *pdev) goto fail; } - ret = clk_enable(iommu_pclk); + ret = clk_prepare_enable(iommu_pclk); if (ret) goto fail_enable; @@ -168,9 +166,9 @@ static int msm_iommu_probe(struct platform_device *pdev) if (!IS_ERR(iommu_clk)) { if (clk_get_rate(iommu_clk) == 0) - clk_set_min_rate(iommu_clk, 1); + clk_set_rate(iommu_clk, 1); - ret = clk_enable(iommu_clk); + ret = clk_prepare_enable(iommu_clk); if (ret) { clk_put(iommu_clk); goto fail_pclk; @@ -179,35 +177,16 @@ static int msm_iommu_probe(struct platform_device *pdev) iommu_clk = NULL; r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "physbase"); - - if (!r) { - ret = -ENODEV; + regs_base = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(regs_base)) { + ret = PTR_ERR(regs_base); goto fail_clk; } - len = resource_size(r); - - r2 = request_mem_region(r->start, len, r->name); - if (!r2) { - pr_err("Could not request memory region: start=%p, len=%d\n", - (void *) r->start, len); - ret = -EBUSY; - goto fail_clk; - } - - regs_base = ioremap(r2->start, len); - - if (!regs_base) { - pr_err("Could not ioremap: start=%p, len=%d\n", - (void *) r2->start, len); - ret = -EBUSY; - goto fail_mem; - } - irq = platform_get_irq_byname(pdev, "secure_irq"); if (irq < 0) { ret = -ENODEV; - goto fail_io; + goto fail_clk; } msm_iommu_reset(regs_base, iommu_dev->ncb); @@ -223,14 +202,14 @@ static int msm_iommu_probe(struct platform_device *pdev) if (!par) { pr_err("%s: Invalid PAR value detected\n", iommu_dev->name); ret = -ENODEV; - goto fail_io; + goto fail_clk; } ret = request_irq(irq, msm_iommu_fault_handler, 0, "msm_iommu_secure_irpt_handler", drvdata); if (ret) { pr_err("Request IRQ %d failed with ret=%d\n", irq, ret); - goto fail_io; + goto fail_clk; } @@ -251,17 +230,13 @@ static int msm_iommu_probe(struct platform_device *pdev) clk_disable(iommu_pclk); return 0; -fail_io: - iounmap(regs_base); -fail_mem: - release_mem_region(r->start, len); fail_clk: if (iommu_clk) { clk_disable(iommu_clk); clk_put(iommu_clk); } fail_pclk: - clk_disable(iommu_pclk); + clk_disable_unprepare(iommu_pclk); fail_enable: clk_put(iommu_pclk); fail: @@ -275,12 +250,14 @@ static int msm_iommu_remove(struct platform_device *pdev) drv = platform_get_drvdata(pdev); if (drv) { - if (drv->clk) + if (drv->clk) { + clk_unprepare(drv->clk); clk_put(drv->clk); + } + clk_unprepare(drv->pclk); clk_put(drv->pclk); memset(drv, 0, sizeof(*drv)); kfree(drv); - platform_set_drvdata(pdev, NULL); } return 0; } @@ -289,39 +266,34 @@ static int msm_iommu_ctx_probe(struct platform_device *pdev) { struct msm_iommu_ctx_dev *c = pdev->dev.platform_data; struct msm_iommu_drvdata *drvdata; - struct msm_iommu_ctx_drvdata *ctx_drvdata = NULL; + struct msm_iommu_ctx_drvdata *ctx_drvdata; int i, ret; - if (!c || !pdev->dev.parent) { - ret = -EINVAL; - goto fail; - } - drvdata = dev_get_drvdata(pdev->dev.parent); + if (!c || !pdev->dev.parent) + return -EINVAL; - if (!drvdata) { - ret = -ENODEV; - goto fail; - } + drvdata = dev_get_drvdata(pdev->dev.parent); + if (!drvdata) + return -ENODEV; ctx_drvdata = kzalloc(sizeof(*ctx_drvdata), GFP_KERNEL); - if (!ctx_drvdata) { - ret = -ENOMEM; - goto fail; - } + if (!ctx_drvdata) + return -ENOMEM; + ctx_drvdata->num = c->num; ctx_drvdata->pdev = pdev; INIT_LIST_HEAD(&ctx_drvdata->attached_elm); platform_set_drvdata(pdev, ctx_drvdata); - ret = clk_enable(drvdata->pclk); + ret = clk_prepare_enable(drvdata->pclk); if (ret) goto fail; if (drvdata->clk) { - ret = clk_enable(drvdata->clk); + ret = clk_prepare_enable(drvdata->clk); if (ret) { - clk_disable(drvdata->pclk); + clk_disable_unprepare(drvdata->pclk); goto fail; } } @@ -369,7 +341,6 @@ static int msm_iommu_ctx_remove(struct platform_device *pdev) if (drv) { memset(drv, 0, sizeof(struct msm_iommu_ctx_drvdata)); kfree(drv); - platform_set_drvdata(pdev, NULL); } return 0; } @@ -401,6 +372,7 @@ static int __init msm_iommu_driver_init(void) ret = platform_driver_register(&msm_iommu_ctx_driver); if (ret != 0) { + platform_driver_unregister(&msm_iommu_driver); pr_err("Failed to register IOMMU context driver\n"); goto error; } diff --git a/drivers/iommu/msm_iommu_hw-8xxx.h b/drivers/iommu/msm_iommu_hw-8xxx.h new file mode 100644 index 00000000000..fc160101dea --- /dev/null +++ b/drivers/iommu/msm_iommu_hw-8xxx.h @@ -0,0 +1,1865 @@ +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef __ARCH_ARM_MACH_MSM_IOMMU_HW_8XXX_H +#define __ARCH_ARM_MACH_MSM_IOMMU_HW_8XXX_H + +#define CTX_SHIFT 12 + +#define GET_GLOBAL_REG(reg, base) (readl((base) + (reg))) +#define GET_CTX_REG(reg, base, ctx) \ + (readl((base) + (reg) + ((ctx) << CTX_SHIFT))) + +#define SET_GLOBAL_REG(reg, base, val) writel((val), ((base) + (reg))) + +#define SET_CTX_REG(reg, base, ctx, val) \ + writel((val), ((base) + (reg) + ((ctx) << CTX_SHIFT))) + +/* Wrappers for numbered registers */ +#define SET_GLOBAL_REG_N(b, n, r, v) SET_GLOBAL_REG(b, ((r) + (n << 2)), (v)) +#define GET_GLOBAL_REG_N(b, n, r) GET_GLOBAL_REG(b, ((r) + (n << 2))) + +/* Field wrappers */ +#define GET_GLOBAL_FIELD(b, r, F) GET_FIELD(((b) + (r)), F##_MASK, F##_SHIFT) +#define GET_CONTEXT_FIELD(b, c, r, F) \ + GET_FIELD(((b) + (r) + ((c) << CTX_SHIFT)), F##_MASK, F##_SHIFT) + +#define SET_GLOBAL_FIELD(b, r, F, v) \ + SET_FIELD(((b) + (r)), F##_MASK, F##_SHIFT, (v)) +#define SET_CONTEXT_FIELD(b, c, r, F, v) \ + SET_FIELD(((b) + (r) + ((c) << CTX_SHIFT)), F##_MASK, F##_SHIFT, (v)) + +#define GET_FIELD(addr, mask, shift) ((readl(addr) >> (shift)) & (mask)) + +#define SET_FIELD(addr, mask, shift, v) \ +do { \ + int t = readl(addr); \ + writel((t & ~((mask) << (shift))) + (((v) & (mask)) << (shift)), addr);\ +} while (0) + + +#define NUM_FL_PTE 4096 +#define NUM_SL_PTE 256 +#define NUM_TEX_CLASS 8 + +/* First-level page table bits */ +#define FL_BASE_MASK 0xFFFFFC00 +#define FL_TYPE_TABLE (1 << 0) +#define FL_TYPE_SECT (2 << 0) +#define FL_SUPERSECTION (1 << 18) +#define FL_AP_WRITE (1 << 10) +#define FL_AP_READ (1 << 11) +#define FL_SHARED (1 << 16) +#define FL_BUFFERABLE (1 << 2) +#define FL_CACHEABLE (1 << 3) +#define FL_TEX0 (1 << 12) +#define FL_OFFSET(va) (((va) & 0xFFF00000) >> 20) +#define FL_NG (1 << 17) + +/* Second-level page table bits */ +#define SL_BASE_MASK_LARGE 0xFFFF0000 +#define SL_BASE_MASK_SMALL 0xFFFFF000 +#define SL_TYPE_LARGE (1 << 0) +#define SL_TYPE_SMALL (2 << 0) +#define SL_AP0 (1 << 4) +#define SL_AP1 (2 << 4) +#define SL_SHARED (1 << 10) +#define SL_BUFFERABLE (1 << 2) +#define SL_CACHEABLE (1 << 3) +#define SL_TEX0 (1 << 6) +#define SL_OFFSET(va) (((va) & 0xFF000) >> 12) +#define SL_NG (1 << 11) + +/* Memory type and cache policy attributes */ +#define MT_SO 0 +#define MT_DEV 1 +#define MT_NORMAL 2 +#define CP_NONCACHED 0 +#define CP_WB_WA 1 +#define CP_WT 2 +#define CP_WB_NWA 3 + +/* Global register setters / getters */ +#define SET_M2VCBR_N(b, N, v) SET_GLOBAL_REG_N(M2VCBR_N, N, (b), (v)) +#define SET_CBACR_N(b, N, v) SET_GLOBAL_REG_N(CBACR_N, N, (b), (v)) +#define SET_TLBRSW(b, v) SET_GLOBAL_REG(TLBRSW, (b), (v)) +#define SET_TLBTR0(b, v) SET_GLOBAL_REG(TLBTR0, (b), (v)) +#define SET_TLBTR1(b, v) SET_GLOBAL_REG(TLBTR1, (b), (v)) +#define SET_TLBTR2(b, v) SET_GLOBAL_REG(TLBTR2, (b), (v)) +#define SET_TESTBUSCR(b, v) SET_GLOBAL_REG(TESTBUSCR, (b), (v)) +#define SET_GLOBAL_TLBIALL(b, v) SET_GLOBAL_REG(GLOBAL_TLBIALL, (b), (v)) +#define SET_TLBIVMID(b, v) SET_GLOBAL_REG(TLBIVMID, (b), (v)) +#define SET_CR(b, v) SET_GLOBAL_REG(CR, (b), (v)) +#define SET_EAR(b, v) SET_GLOBAL_REG(EAR, (b), (v)) +#define SET_ESR(b, v) SET_GLOBAL_REG(ESR, (b), (v)) +#define SET_ESRRESTORE(b, v) SET_GLOBAL_REG(ESRRESTORE, (b), (v)) +#define SET_ESYNR0(b, v) SET_GLOBAL_REG(ESYNR0, (b), (v)) +#define SET_ESYNR1(b, v) SET_GLOBAL_REG(ESYNR1, (b), (v)) +#define SET_RPU_ACR(b, v) SET_GLOBAL_REG(RPU_ACR, (b), (v)) + +#define GET_M2VCBR_N(b, N) GET_GLOBAL_REG_N(M2VCBR_N, N, (b)) +#define GET_CBACR_N(b, N) GET_GLOBAL_REG_N(CBACR_N, N, (b)) +#define GET_TLBTR0(b) GET_GLOBAL_REG(TLBTR0, (b)) +#define GET_TLBTR1(b) GET_GLOBAL_REG(TLBTR1, (b)) +#define GET_TLBTR2(b) GET_GLOBAL_REG(TLBTR2, (b)) +#define GET_TESTBUSCR(b) GET_GLOBAL_REG(TESTBUSCR, (b)) +#define GET_GLOBAL_TLBIALL(b) GET_GLOBAL_REG(GLOBAL_TLBIALL, (b)) +#define GET_TLBIVMID(b) GET_GLOBAL_REG(TLBIVMID, (b)) +#define GET_CR(b) GET_GLOBAL_REG(CR, (b)) +#define GET_EAR(b) GET_GLOBAL_REG(EAR, (b)) +#define GET_ESR(b) GET_GLOBAL_REG(ESR, (b)) +#define GET_ESRRESTORE(b) GET_GLOBAL_REG(ESRRESTORE, (b)) +#define GET_ESYNR0(b) GET_GLOBAL_REG(ESYNR0, (b)) +#define GET_ESYNR1(b) GET_GLOBAL_REG(ESYNR1, (b)) +#define GET_REV(b) GET_GLOBAL_REG(REV, (b)) +#define GET_IDR(b) GET_GLOBAL_REG(IDR, (b)) +#define GET_RPU_ACR(b) GET_GLOBAL_REG(RPU_ACR, (b)) + + +/* Context register setters/getters */ +#define SET_SCTLR(b, c, v) SET_CTX_REG(SCTLR, (b), (c), (v)) +#define SET_ACTLR(b, c, v) SET_CTX_REG(ACTLR, (b), (c), (v)) +#define SET_CONTEXTIDR(b, c, v) SET_CTX_REG(CONTEXTIDR, (b), (c), (v)) +#define SET_TTBR0(b, c, v) SET_CTX_REG(TTBR0, (b), (c), (v)) +#define SET_TTBR1(b, c, v) SET_CTX_REG(TTBR1, (b), (c), (v)) +#define SET_TTBCR(b, c, v) SET_CTX_REG(TTBCR, (b), (c), (v)) +#define SET_PAR(b, c, v) SET_CTX_REG(PAR, (b), (c), (v)) +#define SET_FSR(b, c, v) SET_CTX_REG(FSR, (b), (c), (v)) +#define SET_FSRRESTORE(b, c, v) SET_CTX_REG(FSRRESTORE, (b), (c), (v)) +#define SET_FAR(b, c, v) SET_CTX_REG(FAR, (b), (c), (v)) +#define SET_FSYNR0(b, c, v) SET_CTX_REG(FSYNR0, (b), (c), (v)) +#define SET_FSYNR1(b, c, v) SET_CTX_REG(FSYNR1, (b), (c), (v)) +#define SET_PRRR(b, c, v) SET_CTX_REG(PRRR, (b), (c), (v)) +#define SET_NMRR(b, c, v) SET_CTX_REG(NMRR, (b), (c), (v)) +#define SET_TLBLKCR(b, c, v) SET_CTX_REG(TLBLCKR, (b), (c), (v)) +#define SET_V2PSR(b, c, v) SET_CTX_REG(V2PSR, (b), (c), (v)) +#define SET_TLBFLPTER(b, c, v) SET_CTX_REG(TLBFLPTER, (b), (c), (v)) +#define SET_TLBSLPTER(b, c, v) SET_CTX_REG(TLBSLPTER, (b), (c), (v)) +#define SET_BFBCR(b, c, v) SET_CTX_REG(BFBCR, (b), (c), (v)) +#define SET_CTX_TLBIALL(b, c, v) SET_CTX_REG(CTX_TLBIALL, (b), (c), (v)) +#define SET_TLBIASID(b, c, v) SET_CTX_REG(TLBIASID, (b), (c), (v)) +#define SET_TLBIVA(b, c, v) SET_CTX_REG(TLBIVA, (b), (c), (v)) +#define SET_TLBIVAA(b, c, v) SET_CTX_REG(TLBIVAA, (b), (c), (v)) +#define SET_V2PPR(b, c, v) SET_CTX_REG(V2PPR, (b), (c), (v)) +#define SET_V2PPW(b, c, v) SET_CTX_REG(V2PPW, (b), (c), (v)) +#define SET_V2PUR(b, c, v) SET_CTX_REG(V2PUR, (b), (c), (v)) +#define SET_V2PUW(b, c, v) SET_CTX_REG(V2PUW, (b), (c), (v)) +#define SET_RESUME(b, c, v) SET_CTX_REG(RESUME, (b), (c), (v)) + +#define GET_SCTLR(b, c) GET_CTX_REG(SCTLR, (b), (c)) +#define GET_ACTLR(b, c) GET_CTX_REG(ACTLR, (b), (c)) +#define GET_CONTEXTIDR(b, c) GET_CTX_REG(CONTEXTIDR, (b), (c)) +#define GET_TTBR0(b, c) GET_CTX_REG(TTBR0, (b), (c)) +#define GET_TTBR1(b, c) GET_CTX_REG(TTBR1, (b), (c)) +#define GET_TTBCR(b, c) GET_CTX_REG(TTBCR, (b), (c)) +#define GET_PAR(b, c) GET_CTX_REG(PAR, (b), (c)) +#define GET_FSR(b, c) GET_CTX_REG(FSR, (b), (c)) +#define GET_FSRRESTORE(b, c) GET_CTX_REG(FSRRESTORE, (b), (c)) +#define GET_FAR(b, c) GET_CTX_REG(FAR, (b), (c)) +#define GET_FSYNR0(b, c) GET_CTX_REG(FSYNR0, (b), (c)) +#define GET_FSYNR1(b, c) GET_CTX_REG(FSYNR1, (b), (c)) +#define GET_PRRR(b, c) GET_CTX_REG(PRRR, (b), (c)) +#define GET_NMRR(b, c) GET_CTX_REG(NMRR, (b), (c)) +#define GET_TLBLCKR(b, c) GET_CTX_REG(TLBLCKR, (b), (c)) +#define GET_V2PSR(b, c) GET_CTX_REG(V2PSR, (b), (c)) +#define GET_TLBFLPTER(b, c) GET_CTX_REG(TLBFLPTER, (b), (c)) +#define GET_TLBSLPTER(b, c) GET_CTX_REG(TLBSLPTER, (b), (c)) +#define GET_BFBCR(b, c) GET_CTX_REG(BFBCR, (b), (c)) +#define GET_CTX_TLBIALL(b, c) GET_CTX_REG(CTX_TLBIALL, (b), (c)) +#define GET_TLBIASID(b, c) GET_CTX_REG(TLBIASID, (b), (c)) +#define GET_TLBIVA(b, c) GET_CTX_REG(TLBIVA, (b), (c)) +#define GET_TLBIVAA(b, c) GET_CTX_REG(TLBIVAA, (b), (c)) +#define GET_V2PPR(b, c) GET_CTX_REG(V2PPR, (b), (c)) +#define GET_V2PPW(b, c) GET_CTX_REG(V2PPW, (b), (c)) +#define GET_V2PUR(b, c) GET_CTX_REG(V2PUR, (b), (c)) +#define GET_V2PUW(b, c) GET_CTX_REG(V2PUW, (b), (c)) +#define GET_RESUME(b, c) GET_CTX_REG(RESUME, (b), (c)) + + +/* Global field setters / getters */ +/* Global Field Setters: */ +/* CBACR_N */ +#define SET_RWVMID(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(CBACR_N), RWVMID, v) +#define SET_RWE(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(CBACR_N), RWE, v) +#define SET_RWGE(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(CBACR_N), RWGE, v) +#define SET_CBVMID(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(CBACR_N), CBVMID, v) +#define SET_IRPTNDX(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(CBACR_N), IRPTNDX, v) + + +/* M2VCBR_N */ +#define SET_VMID(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), VMID, v) +#define SET_CBNDX(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), CBNDX, v) +#define SET_BYPASSD(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BYPASSD, v) +#define SET_BPRCOSH(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPRCOSH, v) +#define SET_BPRCISH(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPRCISH, v) +#define SET_BPRCNSH(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPRCNSH, v) +#define SET_BPSHCFG(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPSHCFG, v) +#define SET_NSCFG(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), NSCFG, v) +#define SET_BPMTCFG(b, n, v) SET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPMTCFG, v) +#define SET_BPMEMTYPE(b, n, v) \ + SET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPMEMTYPE, v) + + +/* CR */ +#define SET_RPUE(b, v) SET_GLOBAL_FIELD(b, CR, RPUE, v) +#define SET_RPUERE(b, v) SET_GLOBAL_FIELD(b, CR, RPUERE, v) +#define SET_RPUEIE(b, v) SET_GLOBAL_FIELD(b, CR, RPUEIE, v) +#define SET_DCDEE(b, v) SET_GLOBAL_FIELD(b, CR, DCDEE, v) +#define SET_CLIENTPD(b, v) SET_GLOBAL_FIELD(b, CR, CLIENTPD, v) +#define SET_STALLD(b, v) SET_GLOBAL_FIELD(b, CR, STALLD, v) +#define SET_TLBLKCRWE(b, v) SET_GLOBAL_FIELD(b, CR, TLBLKCRWE, v) +#define SET_CR_TLBIALLCFG(b, v) SET_GLOBAL_FIELD(b, CR, CR_TLBIALLCFG, v) +#define SET_TLBIVMIDCFG(b, v) SET_GLOBAL_FIELD(b, CR, TLBIVMIDCFG, v) +#define SET_CR_HUME(b, v) SET_GLOBAL_FIELD(b, CR, CR_HUME, v) + + +/* ESR */ +#define SET_CFG(b, v) SET_GLOBAL_FIELD(b, ESR, CFG, v) +#define SET_BYPASS(b, v) SET_GLOBAL_FIELD(b, ESR, BYPASS, v) +#define SET_ESR_MULTI(b, v) SET_GLOBAL_FIELD(b, ESR, ESR_MULTI, v) + + +/* ESYNR0 */ +#define SET_ESYNR0_AMID(b, v) SET_GLOBAL_FIELD(b, ESYNR0, ESYNR0_AMID, v) +#define SET_ESYNR0_APID(b, v) SET_GLOBAL_FIELD(b, ESYNR0, ESYNR0_APID, v) +#define SET_ESYNR0_ABID(b, v) SET_GLOBAL_FIELD(b, ESYNR0, ESYNR0_ABID, v) +#define SET_ESYNR0_AVMID(b, v) SET_GLOBAL_FIELD(b, ESYNR0, ESYNR0_AVMID, v) +#define SET_ESYNR0_ATID(b, v) SET_GLOBAL_FIELD(b, ESYNR0, ESYNR0_ATID, v) + + +/* ESYNR1 */ +#define SET_ESYNR1_AMEMTYPE(b, v) \ + SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AMEMTYPE, v) +#define SET_ESYNR1_ASHARED(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_ASHARED, v) +#define SET_ESYNR1_AINNERSHARED(b, v) \ + SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AINNERSHARED, v) +#define SET_ESYNR1_APRIV(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_APRIV, v) +#define SET_ESYNR1_APROTNS(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_APROTNS, v) +#define SET_ESYNR1_AINST(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AINST, v) +#define SET_ESYNR1_AWRITE(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AWRITE, v) +#define SET_ESYNR1_ABURST(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_ABURST, v) +#define SET_ESYNR1_ALEN(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_ALEN, v) +#define SET_ESYNR1_ASIZE(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_ASIZE, v) +#define SET_ESYNR1_ALOCK(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_ALOCK, v) +#define SET_ESYNR1_AOOO(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AOOO, v) +#define SET_ESYNR1_AFULL(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AFULL, v) +#define SET_ESYNR1_AC(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AC, v) +#define SET_ESYNR1_DCD(b, v) SET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_DCD, v) + + +/* TESTBUSCR */ +#define SET_TBE(b, v) SET_GLOBAL_FIELD(b, TESTBUSCR, TBE, v) +#define SET_SPDMBE(b, v) SET_GLOBAL_FIELD(b, TESTBUSCR, SPDMBE, v) +#define SET_WGSEL(b, v) SET_GLOBAL_FIELD(b, TESTBUSCR, WGSEL, v) +#define SET_TBLSEL(b, v) SET_GLOBAL_FIELD(b, TESTBUSCR, TBLSEL, v) +#define SET_TBHSEL(b, v) SET_GLOBAL_FIELD(b, TESTBUSCR, TBHSEL, v) +#define SET_SPDM0SEL(b, v) SET_GLOBAL_FIELD(b, TESTBUSCR, SPDM0SEL, v) +#define SET_SPDM1SEL(b, v) SET_GLOBAL_FIELD(b, TESTBUSCR, SPDM1SEL, v) +#define SET_SPDM2SEL(b, v) SET_GLOBAL_FIELD(b, TESTBUSCR, SPDM2SEL, v) +#define SET_SPDM3SEL(b, v) SET_GLOBAL_FIELD(b, TESTBUSCR, SPDM3SEL, v) + + +/* TLBIVMID */ +#define SET_TLBIVMID_VMID(b, v) SET_GLOBAL_FIELD(b, TLBIVMID, TLBIVMID_VMID, v) + + +/* TLBRSW */ +#define SET_TLBRSW_INDEX(b, v) SET_GLOBAL_FIELD(b, TLBRSW, TLBRSW_INDEX, v) +#define SET_TLBBFBS(b, v) SET_GLOBAL_FIELD(b, TLBRSW, TLBBFBS, v) + + +/* TLBTR0 */ +#define SET_PR(b, v) SET_GLOBAL_FIELD(b, TLBTR0, PR, v) +#define SET_PW(b, v) SET_GLOBAL_FIELD(b, TLBTR0, PW, v) +#define SET_UR(b, v) SET_GLOBAL_FIELD(b, TLBTR0, UR, v) +#define SET_UW(b, v) SET_GLOBAL_FIELD(b, TLBTR0, UW, v) +#define SET_XN(b, v) SET_GLOBAL_FIELD(b, TLBTR0, XN, v) +#define SET_NSDESC(b, v) SET_GLOBAL_FIELD(b, TLBTR0, NSDESC, v) +#define SET_ISH(b, v) SET_GLOBAL_FIELD(b, TLBTR0, ISH, v) +#define SET_SH(b, v) SET_GLOBAL_FIELD(b, TLBTR0, SH, v) +#define SET_MT(b, v) SET_GLOBAL_FIELD(b, TLBTR0, MT, v) +#define SET_DPSIZR(b, v) SET_GLOBAL_FIELD(b, TLBTR0, DPSIZR, v) +#define SET_DPSIZC(b, v) SET_GLOBAL_FIELD(b, TLBTR0, DPSIZC, v) + + +/* TLBTR1 */ +#define SET_TLBTR1_VMID(b, v) SET_GLOBAL_FIELD(b, TLBTR1, TLBTR1_VMID, v) +#define SET_TLBTR1_PA(b, v) SET_GLOBAL_FIELD(b, TLBTR1, TLBTR1_PA, v) + + +/* TLBTR2 */ +#define SET_TLBTR2_ASID(b, v) SET_GLOBAL_FIELD(b, TLBTR2, TLBTR2_ASID, v) +#define SET_TLBTR2_V(b, v) SET_GLOBAL_FIELD(b, TLBTR2, TLBTR2_V, v) +#define SET_TLBTR2_NSTID(b, v) SET_GLOBAL_FIELD(b, TLBTR2, TLBTR2_NSTID, v) +#define SET_TLBTR2_NV(b, v) SET_GLOBAL_FIELD(b, TLBTR2, TLBTR2_NV, v) +#define SET_TLBTR2_VA(b, v) SET_GLOBAL_FIELD(b, TLBTR2, TLBTR2_VA, v) + + +/* Global Field Getters */ +/* CBACR_N */ +#define GET_RWVMID(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(CBACR_N), RWVMID) +#define GET_RWE(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(CBACR_N), RWE) +#define GET_RWGE(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(CBACR_N), RWGE) +#define GET_CBVMID(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(CBACR_N), CBVMID) +#define GET_IRPTNDX(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(CBACR_N), IRPTNDX) + + +/* M2VCBR_N */ +#define GET_VMID(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), VMID) +#define GET_CBNDX(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), CBNDX) +#define GET_BYPASSD(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BYPASSD) +#define GET_BPRCOSH(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPRCOSH) +#define GET_BPRCISH(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPRCISH) +#define GET_BPRCNSH(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPRCNSH) +#define GET_BPSHCFG(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPSHCFG) +#define GET_NSCFG(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), NSCFG) +#define GET_BPMTCFG(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPMTCFG) +#define GET_BPMEMTYPE(b, n) GET_GLOBAL_FIELD(b, (n<<2)|(M2VCBR_N), BPMEMTYPE) + + +/* CR */ +#define GET_RPUE(b) GET_GLOBAL_FIELD(b, CR, RPUE) +#define GET_RPUERE(b) GET_GLOBAL_FIELD(b, CR, RPUERE) +#define GET_RPUEIE(b) GET_GLOBAL_FIELD(b, CR, RPUEIE) +#define GET_DCDEE(b) GET_GLOBAL_FIELD(b, CR, DCDEE) +#define GET_CLIENTPD(b) GET_GLOBAL_FIELD(b, CR, CLIENTPD) +#define GET_STALLD(b) GET_GLOBAL_FIELD(b, CR, STALLD) +#define GET_TLBLKCRWE(b) GET_GLOBAL_FIELD(b, CR, TLBLKCRWE) +#define GET_CR_TLBIALLCFG(b) GET_GLOBAL_FIELD(b, CR, CR_TLBIALLCFG) +#define GET_TLBIVMIDCFG(b) GET_GLOBAL_FIELD(b, CR, TLBIVMIDCFG) +#define GET_CR_HUME(b) GET_GLOBAL_FIELD(b, CR, CR_HUME) + + +/* ESR */ +#define GET_CFG(b) GET_GLOBAL_FIELD(b, ESR, CFG) +#define GET_BYPASS(b) GET_GLOBAL_FIELD(b, ESR, BYPASS) +#define GET_ESR_MULTI(b) GET_GLOBAL_FIELD(b, ESR, ESR_MULTI) + + +/* ESYNR0 */ +#define GET_ESYNR0_AMID(b) GET_GLOBAL_FIELD(b, ESYNR0, ESYNR0_AMID) +#define GET_ESYNR0_APID(b) GET_GLOBAL_FIELD(b, ESYNR0, ESYNR0_APID) +#define GET_ESYNR0_ABID(b) GET_GLOBAL_FIELD(b, ESYNR0, ESYNR0_ABID) +#define GET_ESYNR0_AVMID(b) GET_GLOBAL_FIELD(b, ESYNR0, ESYNR0_AVMID) +#define GET_ESYNR0_ATID(b) GET_GLOBAL_FIELD(b, ESYNR0, ESYNR0_ATID) + + +/* ESYNR1 */ +#define GET_ESYNR1_AMEMTYPE(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AMEMTYPE) +#define GET_ESYNR1_ASHARED(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_ASHARED) +#define GET_ESYNR1_AINNERSHARED(b) \ + GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AINNERSHARED) +#define GET_ESYNR1_APRIV(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_APRIV) +#define GET_ESYNR1_APROTNS(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_APROTNS) +#define GET_ESYNR1_AINST(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AINST) +#define GET_ESYNR1_AWRITE(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AWRITE) +#define GET_ESYNR1_ABURST(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_ABURST) +#define GET_ESYNR1_ALEN(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_ALEN) +#define GET_ESYNR1_ASIZE(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_ASIZE) +#define GET_ESYNR1_ALOCK(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_ALOCK) +#define GET_ESYNR1_AOOO(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AOOO) +#define GET_ESYNR1_AFULL(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AFULL) +#define GET_ESYNR1_AC(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_AC) +#define GET_ESYNR1_DCD(b) GET_GLOBAL_FIELD(b, ESYNR1, ESYNR1_DCD) + + +/* IDR */ +#define GET_NM2VCBMT(b) GET_GLOBAL_FIELD(b, IDR, NM2VCBMT) +#define GET_HTW(b) GET_GLOBAL_FIELD(b, IDR, HTW) +#define GET_HUM(b) GET_GLOBAL_FIELD(b, IDR, HUM) +#define GET_TLBSIZE(b) GET_GLOBAL_FIELD(b, IDR, TLBSIZE) +#define GET_NCB(b) GET_GLOBAL_FIELD(b, IDR, NCB) +#define GET_NIRPT(b) GET_GLOBAL_FIELD(b, IDR, NIRPT) + + +/* REV */ +#define GET_MAJOR(b) GET_GLOBAL_FIELD(b, REV, MAJOR) +#define GET_MINOR(b) GET_GLOBAL_FIELD(b, REV, MINOR) + + +/* TESTBUSCR */ +#define GET_TBE(b) GET_GLOBAL_FIELD(b, TESTBUSCR, TBE) +#define GET_SPDMBE(b) GET_GLOBAL_FIELD(b, TESTBUSCR, SPDMBE) +#define GET_WGSEL(b) GET_GLOBAL_FIELD(b, TESTBUSCR, WGSEL) +#define GET_TBLSEL(b) GET_GLOBAL_FIELD(b, TESTBUSCR, TBLSEL) +#define GET_TBHSEL(b) GET_GLOBAL_FIELD(b, TESTBUSCR, TBHSEL) +#define GET_SPDM0SEL(b) GET_GLOBAL_FIELD(b, TESTBUSCR, SPDM0SEL) +#define GET_SPDM1SEL(b) GET_GLOBAL_FIELD(b, TESTBUSCR, SPDM1SEL) +#define GET_SPDM2SEL(b) GET_GLOBAL_FIELD(b, TESTBUSCR, SPDM2SEL) +#define GET_SPDM3SEL(b) GET_GLOBAL_FIELD(b, TESTBUSCR, SPDM3SEL) + + +/* TLBIVMID */ +#define GET_TLBIVMID_VMID(b) GET_GLOBAL_FIELD(b, TLBIVMID, TLBIVMID_VMID) + + +/* TLBTR0 */ +#define GET_PR(b) GET_GLOBAL_FIELD(b, TLBTR0, PR) +#define GET_PW(b) GET_GLOBAL_FIELD(b, TLBTR0, PW) +#define GET_UR(b) GET_GLOBAL_FIELD(b, TLBTR0, UR) +#define GET_UW(b) GET_GLOBAL_FIELD(b, TLBTR0, UW) +#define GET_XN(b) GET_GLOBAL_FIELD(b, TLBTR0, XN) +#define GET_NSDESC(b) GET_GLOBAL_FIELD(b, TLBTR0, NSDESC) +#define GET_ISH(b) GET_GLOBAL_FIELD(b, TLBTR0, ISH) +#define GET_SH(b) GET_GLOBAL_FIELD(b, TLBTR0, SH) +#define GET_MT(b) GET_GLOBAL_FIELD(b, TLBTR0, MT) +#define GET_DPSIZR(b) GET_GLOBAL_FIELD(b, TLBTR0, DPSIZR) +#define GET_DPSIZC(b) GET_GLOBAL_FIELD(b, TLBTR0, DPSIZC) + + +/* TLBTR1 */ +#define GET_TLBTR1_VMID(b) GET_GLOBAL_FIELD(b, TLBTR1, TLBTR1_VMID) +#define GET_TLBTR1_PA(b) GET_GLOBAL_FIELD(b, TLBTR1, TLBTR1_PA) + + +/* TLBTR2 */ +#define GET_TLBTR2_ASID(b) GET_GLOBAL_FIELD(b, TLBTR2, TLBTR2_ASID) +#define GET_TLBTR2_V(b) GET_GLOBAL_FIELD(b, TLBTR2, TLBTR2_V) +#define GET_TLBTR2_NSTID(b) GET_GLOBAL_FIELD(b, TLBTR2, TLBTR2_NSTID) +#define GET_TLBTR2_NV(b) GET_GLOBAL_FIELD(b, TLBTR2, TLBTR2_NV) +#define GET_TLBTR2_VA(b) GET_GLOBAL_FIELD(b, TLBTR2, TLBTR2_VA) + + +/* Context Register setters / getters */ +/* Context Register setters */ +/* ACTLR */ +#define SET_CFERE(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, CFERE, v) +#define SET_CFEIE(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, CFEIE, v) +#define SET_PTSHCFG(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, PTSHCFG, v) +#define SET_RCOSH(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, RCOSH, v) +#define SET_RCISH(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, RCISH, v) +#define SET_RCNSH(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, RCNSH, v) +#define SET_PRIVCFG(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, PRIVCFG, v) +#define SET_DNA(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, DNA, v) +#define SET_DNLV2PA(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, DNLV2PA, v) +#define SET_TLBMCFG(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, TLBMCFG, v) +#define SET_CFCFG(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, CFCFG, v) +#define SET_TIPCF(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, TIPCF, v) +#define SET_V2PCFG(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, V2PCFG, v) +#define SET_HUME(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, HUME, v) +#define SET_PTMTCFG(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, PTMTCFG, v) +#define SET_PTMEMTYPE(b, c, v) SET_CONTEXT_FIELD(b, c, ACTLR, PTMEMTYPE, v) + + +/* BFBCR */ +#define SET_BFBDFE(b, c, v) SET_CONTEXT_FIELD(b, c, BFBCR, BFBDFE, v) +#define SET_BFBSFE(b, c, v) SET_CONTEXT_FIELD(b, c, BFBCR, BFBSFE, v) +#define SET_SFVS(b, c, v) SET_CONTEXT_FIELD(b, c, BFBCR, SFVS, v) +#define SET_FLVIC(b, c, v) SET_CONTEXT_FIELD(b, c, BFBCR, FLVIC, v) +#define SET_SLVIC(b, c, v) SET_CONTEXT_FIELD(b, c, BFBCR, SLVIC, v) + + +/* CONTEXTIDR */ +#define SET_CONTEXTIDR_ASID(b, c, v) \ + SET_CONTEXT_FIELD(b, c, CONTEXTIDR, CONTEXTIDR_ASID, v) +#define SET_CONTEXTIDR_PROCID(b, c, v) \ + SET_CONTEXT_FIELD(b, c, CONTEXTIDR, PROCID, v) + + +/* FSR */ +#define SET_TF(b, c, v) SET_CONTEXT_FIELD(b, c, FSR, TF, v) +#define SET_AFF(b, c, v) SET_CONTEXT_FIELD(b, c, FSR, AFF, v) +#define SET_APF(b, c, v) SET_CONTEXT_FIELD(b, c, FSR, APF, v) +#define SET_TLBMF(b, c, v) SET_CONTEXT_FIELD(b, c, FSR, TLBMF, v) +#define SET_HTWDEEF(b, c, v) SET_CONTEXT_FIELD(b, c, FSR, HTWDEEF, v) +#define SET_HTWSEEF(b, c, v) SET_CONTEXT_FIELD(b, c, FSR, HTWSEEF, v) +#define SET_MHF(b, c, v) SET_CONTEXT_FIELD(b, c, FSR, MHF, v) +#define SET_SL(b, c, v) SET_CONTEXT_FIELD(b, c, FSR, SL, v) +#define SET_SS(b, c, v) SET_CONTEXT_FIELD(b, c, FSR, SS, v) +#define SET_MULTI(b, c, v) SET_CONTEXT_FIELD(b, c, FSR, MULTI, v) + + +/* FSYNR0 */ +#define SET_AMID(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR0, AMID, v) +#define SET_APID(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR0, APID, v) +#define SET_ABID(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR0, ABID, v) +#define SET_ATID(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR0, ATID, v) + + +/* FSYNR1 */ +#define SET_AMEMTYPE(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR1, AMEMTYPE, v) +#define SET_ASHARED(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR1, ASHARED, v) +#define SET_AINNERSHARED(b, c, v) \ + SET_CONTEXT_FIELD(b, c, FSYNR1, AINNERSHARED, v) +#define SET_APRIV(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR1, APRIV, v) +#define SET_APROTNS(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR1, APROTNS, v) +#define SET_AINST(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR1, AINST, v) +#define SET_AWRITE(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR1, AWRITE, v) +#define SET_ABURST(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR1, ABURST, v) +#define SET_ALEN(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR1, ALEN, v) +#define SET_FSYNR1_ASIZE(b, c, v) \ + SET_CONTEXT_FIELD(b, c, FSYNR1, FSYNR1_ASIZE, v) +#define SET_ALOCK(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR1, ALOCK, v) +#define SET_AFULL(b, c, v) SET_CONTEXT_FIELD(b, c, FSYNR1, AFULL, v) + + +/* NMRR */ +#define SET_ICPC0(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, ICPC0, v) +#define SET_ICPC1(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, ICPC1, v) +#define SET_ICPC2(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, ICPC2, v) +#define SET_ICPC3(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, ICPC3, v) +#define SET_ICPC4(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, ICPC4, v) +#define SET_ICPC5(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, ICPC5, v) +#define SET_ICPC6(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, ICPC6, v) +#define SET_ICPC7(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, ICPC7, v) +#define SET_OCPC0(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, OCPC0, v) +#define SET_OCPC1(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, OCPC1, v) +#define SET_OCPC2(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, OCPC2, v) +#define SET_OCPC3(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, OCPC3, v) +#define SET_OCPC4(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, OCPC4, v) +#define SET_OCPC5(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, OCPC5, v) +#define SET_OCPC6(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, OCPC6, v) +#define SET_OCPC7(b, c, v) SET_CONTEXT_FIELD(b, c, NMRR, OCPC7, v) + + +/* PAR */ +#define SET_FAULT(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, FAULT, v) + +#define SET_FAULT_TF(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, FAULT_TF, v) +#define SET_FAULT_AFF(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, FAULT_AFF, v) +#define SET_FAULT_APF(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, FAULT_APF, v) +#define SET_FAULT_TLBMF(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, FAULT_TLBMF, v) +#define SET_FAULT_HTWDEEF(b, c, v) \ + SET_CONTEXT_FIELD(b, c, PAR, FAULT_HTWDEEF, v) +#define SET_FAULT_HTWSEEF(b, c, v) \ + SET_CONTEXT_FIELD(b, c, PAR, FAULT_HTWSEEF, v) +#define SET_FAULT_MHF(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, FAULT_MHF, v) +#define SET_FAULT_SL(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, FAULT_SL, v) +#define SET_FAULT_SS(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, FAULT_SS, v) + +#define SET_NOFAULT_SS(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, NOFAULT_SS, v) +#define SET_NOFAULT_MT(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, NOFAULT_MT, v) +#define SET_NOFAULT_SH(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, NOFAULT_SH, v) +#define SET_NOFAULT_NS(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, NOFAULT_NS, v) +#define SET_NOFAULT_NOS(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, NOFAULT_NOS, v) +#define SET_NPFAULT_PA(b, c, v) SET_CONTEXT_FIELD(b, c, PAR, NPFAULT_PA, v) + + +/* PRRR */ +#define SET_MTC0(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, MTC0, v) +#define SET_MTC1(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, MTC1, v) +#define SET_MTC2(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, MTC2, v) +#define SET_MTC3(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, MTC3, v) +#define SET_MTC4(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, MTC4, v) +#define SET_MTC5(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, MTC5, v) +#define SET_MTC6(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, MTC6, v) +#define SET_MTC7(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, MTC7, v) +#define SET_SHDSH0(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, SHDSH0, v) +#define SET_SHDSH1(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, SHDSH1, v) +#define SET_SHNMSH0(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, SHNMSH0, v) +#define SET_SHNMSH1(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, SHNMSH1, v) +#define SET_NOS0(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, NOS0, v) +#define SET_NOS1(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, NOS1, v) +#define SET_NOS2(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, NOS2, v) +#define SET_NOS3(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, NOS3, v) +#define SET_NOS4(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, NOS4, v) +#define SET_NOS5(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, NOS5, v) +#define SET_NOS6(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, NOS6, v) +#define SET_NOS7(b, c, v) SET_CONTEXT_FIELD(b, c, PRRR, NOS7, v) + + +/* RESUME */ +#define SET_TNR(b, c, v) SET_CONTEXT_FIELD(b, c, RESUME, TNR, v) + + +/* SCTLR */ +#define SET_M(b, c, v) SET_CONTEXT_FIELD(b, c, SCTLR, M, v) +#define SET_TRE(b, c, v) SET_CONTEXT_FIELD(b, c, SCTLR, TRE, v) +#define SET_AFE(b, c, v) SET_CONTEXT_FIELD(b, c, SCTLR, AFE, v) +#define SET_HAF(b, c, v) SET_CONTEXT_FIELD(b, c, SCTLR, HAF, v) +#define SET_BE(b, c, v) SET_CONTEXT_FIELD(b, c, SCTLR, BE, v) +#define SET_AFFD(b, c, v) SET_CONTEXT_FIELD(b, c, SCTLR, AFFD, v) + + +/* TLBLKCR */ +#define SET_LKE(b, c, v) SET_CONTEXT_FIELD(b, c, TLBLKCR, LKE, v) +#define SET_TLBLKCR_TLBIALLCFG(b, c, v) \ + SET_CONTEXT_FIELD(b, c, TLBLKCR, TLBLCKR_TLBIALLCFG, v) +#define SET_TLBIASIDCFG(b, c, v) \ + SET_CONTEXT_FIELD(b, c, TLBLKCR, TLBIASIDCFG, v) +#define SET_TLBIVAACFG(b, c, v) SET_CONTEXT_FIELD(b, c, TLBLKCR, TLBIVAACFG, v) +#define SET_FLOOR(b, c, v) SET_CONTEXT_FIELD(b, c, TLBLKCR, FLOOR, v) +#define SET_VICTIM(b, c, v) SET_CONTEXT_FIELD(b, c, TLBLKCR, VICTIM, v) + + +/* TTBCR */ +#define SET_N(b, c, v) SET_CONTEXT_FIELD(b, c, TTBCR, N, v) +#define SET_PD0(b, c, v) SET_CONTEXT_FIELD(b, c, TTBCR, PD0, v) +#define SET_PD1(b, c, v) SET_CONTEXT_FIELD(b, c, TTBCR, PD1, v) + + +/* TTBR0 */ +#define SET_TTBR0_IRGNH(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_IRGNH, v) +#define SET_TTBR0_SH(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_SH, v) +#define SET_TTBR0_ORGN(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_ORGN, v) +#define SET_TTBR0_NOS(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_NOS, v) +#define SET_TTBR0_IRGNL(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_IRGNL, v) +#define SET_TTBR0_PA(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_PA, v) + + +/* TTBR1 */ +#define SET_TTBR1_IRGNH(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_IRGNH, v) +#define SET_TTBR1_SH(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_SH, v) +#define SET_TTBR1_ORGN(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_ORGN, v) +#define SET_TTBR1_NOS(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_NOS, v) +#define SET_TTBR1_IRGNL(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_IRGNL, v) +#define SET_TTBR1_PA(b, c, v) SET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_PA, v) + + +/* V2PSR */ +#define SET_HIT(b, c, v) SET_CONTEXT_FIELD(b, c, V2PSR, HIT, v) +#define SET_INDEX(b, c, v) SET_CONTEXT_FIELD(b, c, V2PSR, INDEX, v) + + +/* Context Register getters */ +/* ACTLR */ +#define GET_CFERE(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, CFERE) +#define GET_CFEIE(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, CFEIE) +#define GET_PTSHCFG(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, PTSHCFG) +#define GET_RCOSH(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, RCOSH) +#define GET_RCISH(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, RCISH) +#define GET_RCNSH(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, RCNSH) +#define GET_PRIVCFG(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, PRIVCFG) +#define GET_DNA(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, DNA) +#define GET_DNLV2PA(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, DNLV2PA) +#define GET_TLBMCFG(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, TLBMCFG) +#define GET_CFCFG(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, CFCFG) +#define GET_TIPCF(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, TIPCF) +#define GET_V2PCFG(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, V2PCFG) +#define GET_HUME(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, HUME) +#define GET_PTMTCFG(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, PTMTCFG) +#define GET_PTMEMTYPE(b, c) GET_CONTEXT_FIELD(b, c, ACTLR, PTMEMTYPE) + +/* BFBCR */ +#define GET_BFBDFE(b, c) GET_CONTEXT_FIELD(b, c, BFBCR, BFBDFE) +#define GET_BFBSFE(b, c) GET_CONTEXT_FIELD(b, c, BFBCR, BFBSFE) +#define GET_SFVS(b, c) GET_CONTEXT_FIELD(b, c, BFBCR, SFVS) +#define GET_FLVIC(b, c) GET_CONTEXT_FIELD(b, c, BFBCR, FLVIC) +#define GET_SLVIC(b, c) GET_CONTEXT_FIELD(b, c, BFBCR, SLVIC) + + +/* CONTEXTIDR */ +#define GET_CONTEXTIDR_ASID(b, c) \ + GET_CONTEXT_FIELD(b, c, CONTEXTIDR, CONTEXTIDR_ASID) +#define GET_CONTEXTIDR_PROCID(b, c) GET_CONTEXT_FIELD(b, c, CONTEXTIDR, PROCID) + + +/* FSR */ +#define GET_TF(b, c) GET_CONTEXT_FIELD(b, c, FSR, TF) +#define GET_AFF(b, c) GET_CONTEXT_FIELD(b, c, FSR, AFF) +#define GET_APF(b, c) GET_CONTEXT_FIELD(b, c, FSR, APF) +#define GET_TLBMF(b, c) GET_CONTEXT_FIELD(b, c, FSR, TLBMF) +#define GET_HTWDEEF(b, c) GET_CONTEXT_FIELD(b, c, FSR, HTWDEEF) +#define GET_HTWSEEF(b, c) GET_CONTEXT_FIELD(b, c, FSR, HTWSEEF) +#define GET_MHF(b, c) GET_CONTEXT_FIELD(b, c, FSR, MHF) +#define GET_SL(b, c) GET_CONTEXT_FIELD(b, c, FSR, SL) +#define GET_SS(b, c) GET_CONTEXT_FIELD(b, c, FSR, SS) +#define GET_MULTI(b, c) GET_CONTEXT_FIELD(b, c, FSR, MULTI) + + +/* FSYNR0 */ +#define GET_AMID(b, c) GET_CONTEXT_FIELD(b, c, FSYNR0, AMID) +#define GET_APID(b, c) GET_CONTEXT_FIELD(b, c, FSYNR0, APID) +#define GET_ABID(b, c) GET_CONTEXT_FIELD(b, c, FSYNR0, ABID) +#define GET_ATID(b, c) GET_CONTEXT_FIELD(b, c, FSYNR0, ATID) + + +/* FSYNR1 */ +#define GET_AMEMTYPE(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, AMEMTYPE) +#define GET_ASHARED(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, ASHARED) +#define GET_AINNERSHARED(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, AINNERSHARED) +#define GET_APRIV(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, APRIV) +#define GET_APROTNS(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, APROTNS) +#define GET_AINST(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, AINST) +#define GET_AWRITE(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, AWRITE) +#define GET_ABURST(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, ABURST) +#define GET_ALEN(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, ALEN) +#define GET_FSYNR1_ASIZE(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, FSYNR1_ASIZE) +#define GET_ALOCK(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, ALOCK) +#define GET_AFULL(b, c) GET_CONTEXT_FIELD(b, c, FSYNR1, AFULL) + + +/* NMRR */ +#define GET_ICPC0(b, c) GET_CONTEXT_FIELD(b, c, NMRR, ICPC0) +#define GET_ICPC1(b, c) GET_CONTEXT_FIELD(b, c, NMRR, ICPC1) +#define GET_ICPC2(b, c) GET_CONTEXT_FIELD(b, c, NMRR, ICPC2) +#define GET_ICPC3(b, c) GET_CONTEXT_FIELD(b, c, NMRR, ICPC3) +#define GET_ICPC4(b, c) GET_CONTEXT_FIELD(b, c, NMRR, ICPC4) +#define GET_ICPC5(b, c) GET_CONTEXT_FIELD(b, c, NMRR, ICPC5) +#define GET_ICPC6(b, c) GET_CONTEXT_FIELD(b, c, NMRR, ICPC6) +#define GET_ICPC7(b, c) GET_CONTEXT_FIELD(b, c, NMRR, ICPC7) +#define GET_OCPC0(b, c) GET_CONTEXT_FIELD(b, c, NMRR, OCPC0) +#define GET_OCPC1(b, c) GET_CONTEXT_FIELD(b, c, NMRR, OCPC1) +#define GET_OCPC2(b, c) GET_CONTEXT_FIELD(b, c, NMRR, OCPC2) +#define GET_OCPC3(b, c) GET_CONTEXT_FIELD(b, c, NMRR, OCPC3) +#define GET_OCPC4(b, c) GET_CONTEXT_FIELD(b, c, NMRR, OCPC4) +#define GET_OCPC5(b, c) GET_CONTEXT_FIELD(b, c, NMRR, OCPC5) +#define GET_OCPC6(b, c) GET_CONTEXT_FIELD(b, c, NMRR, OCPC6) +#define GET_OCPC7(b, c) GET_CONTEXT_FIELD(b, c, NMRR, OCPC7) +#define NMRR_ICP(nmrr, n) (((nmrr) & (3 << ((n) * 2))) >> ((n) * 2)) +#define NMRR_OCP(nmrr, n) (((nmrr) & (3 << ((n) * 2 + 16))) >> \ + ((n) * 2 + 16)) + +/* PAR */ +#define GET_FAULT(b, c) GET_CONTEXT_FIELD(b, c, PAR, FAULT) + +#define GET_FAULT_TF(b, c) GET_CONTEXT_FIELD(b, c, PAR, FAULT_TF) +#define GET_FAULT_AFF(b, c) GET_CONTEXT_FIELD(b, c, PAR, FAULT_AFF) +#define GET_FAULT_APF(b, c) GET_CONTEXT_FIELD(b, c, PAR, FAULT_APF) +#define GET_FAULT_TLBMF(b, c) GET_CONTEXT_FIELD(b, c, PAR, FAULT_TLBMF) +#define GET_FAULT_HTWDEEF(b, c) GET_CONTEXT_FIELD(b, c, PAR, FAULT_HTWDEEF) +#define GET_FAULT_HTWSEEF(b, c) GET_CONTEXT_FIELD(b, c, PAR, FAULT_HTWSEEF) +#define GET_FAULT_MHF(b, c) GET_CONTEXT_FIELD(b, c, PAR, FAULT_MHF) +#define GET_FAULT_SL(b, c) GET_CONTEXT_FIELD(b, c, PAR, FAULT_SL) +#define GET_FAULT_SS(b, c) GET_CONTEXT_FIELD(b, c, PAR, FAULT_SS) + +#define GET_NOFAULT_SS(b, c) GET_CONTEXT_FIELD(b, c, PAR, PAR_NOFAULT_SS) +#define GET_NOFAULT_MT(b, c) GET_CONTEXT_FIELD(b, c, PAR, PAR_NOFAULT_MT) +#define GET_NOFAULT_SH(b, c) GET_CONTEXT_FIELD(b, c, PAR, PAR_NOFAULT_SH) +#define GET_NOFAULT_NS(b, c) GET_CONTEXT_FIELD(b, c, PAR, PAR_NOFAULT_NS) +#define GET_NOFAULT_NOS(b, c) GET_CONTEXT_FIELD(b, c, PAR, PAR_NOFAULT_NOS) +#define GET_NPFAULT_PA(b, c) GET_CONTEXT_FIELD(b, c, PAR, PAR_NPFAULT_PA) + + +/* PRRR */ +#define GET_MTC0(b, c) GET_CONTEXT_FIELD(b, c, PRRR, MTC0) +#define GET_MTC1(b, c) GET_CONTEXT_FIELD(b, c, PRRR, MTC1) +#define GET_MTC2(b, c) GET_CONTEXT_FIELD(b, c, PRRR, MTC2) +#define GET_MTC3(b, c) GET_CONTEXT_FIELD(b, c, PRRR, MTC3) +#define GET_MTC4(b, c) GET_CONTEXT_FIELD(b, c, PRRR, MTC4) +#define GET_MTC5(b, c) GET_CONTEXT_FIELD(b, c, PRRR, MTC5) +#define GET_MTC6(b, c) GET_CONTEXT_FIELD(b, c, PRRR, MTC6) +#define GET_MTC7(b, c) GET_CONTEXT_FIELD(b, c, PRRR, MTC7) +#define GET_SHDSH0(b, c) GET_CONTEXT_FIELD(b, c, PRRR, SHDSH0) +#define GET_SHDSH1(b, c) GET_CONTEXT_FIELD(b, c, PRRR, SHDSH1) +#define GET_SHNMSH0(b, c) GET_CONTEXT_FIELD(b, c, PRRR, SHNMSH0) +#define GET_SHNMSH1(b, c) GET_CONTEXT_FIELD(b, c, PRRR, SHNMSH1) +#define GET_NOS0(b, c) GET_CONTEXT_FIELD(b, c, PRRR, NOS0) +#define GET_NOS1(b, c) GET_CONTEXT_FIELD(b, c, PRRR, NOS1) +#define GET_NOS2(b, c) GET_CONTEXT_FIELD(b, c, PRRR, NOS2) +#define GET_NOS3(b, c) GET_CONTEXT_FIELD(b, c, PRRR, NOS3) +#define GET_NOS4(b, c) GET_CONTEXT_FIELD(b, c, PRRR, NOS4) +#define GET_NOS5(b, c) GET_CONTEXT_FIELD(b, c, PRRR, NOS5) +#define GET_NOS6(b, c) GET_CONTEXT_FIELD(b, c, PRRR, NOS6) +#define GET_NOS7(b, c) GET_CONTEXT_FIELD(b, c, PRRR, NOS7) +#define PRRR_NOS(prrr, n) ((prrr) & (1 << ((n) + 24)) ? 1 : 0) +#define PRRR_MT(prrr, n) ((((prrr) & (3 << ((n) * 2))) >> ((n) * 2))) + + +/* RESUME */ +#define GET_TNR(b, c) GET_CONTEXT_FIELD(b, c, RESUME, TNR) + + +/* SCTLR */ +#define GET_M(b, c) GET_CONTEXT_FIELD(b, c, SCTLR, M) +#define GET_TRE(b, c) GET_CONTEXT_FIELD(b, c, SCTLR, TRE) +#define GET_AFE(b, c) GET_CONTEXT_FIELD(b, c, SCTLR, AFE) +#define GET_HAF(b, c) GET_CONTEXT_FIELD(b, c, SCTLR, HAF) +#define GET_BE(b, c) GET_CONTEXT_FIELD(b, c, SCTLR, BE) +#define GET_AFFD(b, c) GET_CONTEXT_FIELD(b, c, SCTLR, AFFD) + + +/* TLBLKCR */ +#define GET_LKE(b, c) GET_CONTEXT_FIELD(b, c, TLBLKCR, LKE) +#define GET_TLBLCKR_TLBIALLCFG(b, c) \ + GET_CONTEXT_FIELD(b, c, TLBLKCR, TLBLCKR_TLBIALLCFG) +#define GET_TLBIASIDCFG(b, c) GET_CONTEXT_FIELD(b, c, TLBLKCR, TLBIASIDCFG) +#define GET_TLBIVAACFG(b, c) GET_CONTEXT_FIELD(b, c, TLBLKCR, TLBIVAACFG) +#define GET_FLOOR(b, c) GET_CONTEXT_FIELD(b, c, TLBLKCR, FLOOR) +#define GET_VICTIM(b, c) GET_CONTEXT_FIELD(b, c, TLBLKCR, VICTIM) + + +/* TTBCR */ +#define GET_N(b, c) GET_CONTEXT_FIELD(b, c, TTBCR, N) +#define GET_PD0(b, c) GET_CONTEXT_FIELD(b, c, TTBCR, PD0) +#define GET_PD1(b, c) GET_CONTEXT_FIELD(b, c, TTBCR, PD1) + + +/* TTBR0 */ +#define GET_TTBR0_IRGNH(b, c) GET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_IRGNH) +#define GET_TTBR0_SH(b, c) GET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_SH) +#define GET_TTBR0_ORGN(b, c) GET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_ORGN) +#define GET_TTBR0_NOS(b, c) GET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_NOS) +#define GET_TTBR0_IRGNL(b, c) GET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_IRGNL) +#define GET_TTBR0_PA(b, c) GET_CONTEXT_FIELD(b, c, TTBR0, TTBR0_PA) + + +/* TTBR1 */ +#define GET_TTBR1_IRGNH(b, c) GET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_IRGNH) +#define GET_TTBR1_SH(b, c) GET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_SH) +#define GET_TTBR1_ORGN(b, c) GET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_ORGN) +#define GET_TTBR1_NOS(b, c) GET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_NOS) +#define GET_TTBR1_IRGNL(b, c) GET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_IRGNL) +#define GET_TTBR1_PA(b, c) GET_CONTEXT_FIELD(b, c, TTBR1, TTBR1_PA) + + +/* V2PSR */ +#define GET_HIT(b, c) GET_CONTEXT_FIELD(b, c, V2PSR, HIT) +#define GET_INDEX(b, c) GET_CONTEXT_FIELD(b, c, V2PSR, INDEX) + + +/* Global Registers */ +#define M2VCBR_N (0xFF000) +#define CBACR_N (0xFF800) +#define TLBRSW (0xFFE00) +#define TLBTR0 (0xFFE80) +#define TLBTR1 (0xFFE84) +#define TLBTR2 (0xFFE88) +#define TESTBUSCR (0xFFE8C) +#define GLOBAL_TLBIALL (0xFFF00) +#define TLBIVMID (0xFFF04) +#define CR (0xFFF80) +#define EAR (0xFFF84) +#define ESR (0xFFF88) +#define ESRRESTORE (0xFFF8C) +#define ESYNR0 (0xFFF90) +#define ESYNR1 (0xFFF94) +#define REV (0xFFFF4) +#define IDR (0xFFFF8) +#define RPU_ACR (0xFFFFC) + + +/* Context Bank Registers */ +#define SCTLR (0x000) +#define ACTLR (0x004) +#define CONTEXTIDR (0x008) +#define TTBR0 (0x010) +#define TTBR1 (0x014) +#define TTBCR (0x018) +#define PAR (0x01C) +#define FSR (0x020) +#define FSRRESTORE (0x024) +#define FAR (0x028) +#define FSYNR0 (0x02C) +#define FSYNR1 (0x030) +#define PRRR (0x034) +#define NMRR (0x038) +#define TLBLCKR (0x03C) +#define V2PSR (0x040) +#define TLBFLPTER (0x044) +#define TLBSLPTER (0x048) +#define BFBCR (0x04C) +#define CTX_TLBIALL (0x800) +#define TLBIASID (0x804) +#define TLBIVA (0x808) +#define TLBIVAA (0x80C) +#define V2PPR (0x810) +#define V2PPW (0x814) +#define V2PUR (0x818) +#define V2PUW (0x81C) +#define RESUME (0x820) + + +/* Global Register Fields */ +/* CBACRn */ +#define RWVMID (RWVMID_MASK << RWVMID_SHIFT) +#define RWE (RWE_MASK << RWE_SHIFT) +#define RWGE (RWGE_MASK << RWGE_SHIFT) +#define CBVMID (CBVMID_MASK << CBVMID_SHIFT) +#define IRPTNDX (IRPTNDX_MASK << IRPTNDX_SHIFT) + + +/* CR */ +#define RPUE (RPUE_MASK << RPUE_SHIFT) +#define RPUERE (RPUERE_MASK << RPUERE_SHIFT) +#define RPUEIE (RPUEIE_MASK << RPUEIE_SHIFT) +#define DCDEE (DCDEE_MASK << DCDEE_SHIFT) +#define CLIENTPD (CLIENTPD_MASK << CLIENTPD_SHIFT) +#define STALLD (STALLD_MASK << STALLD_SHIFT) +#define TLBLKCRWE (TLBLKCRWE_MASK << TLBLKCRWE_SHIFT) +#define CR_TLBIALLCFG (CR_TLBIALLCFG_MASK << CR_TLBIALLCFG_SHIFT) +#define TLBIVMIDCFG (TLBIVMIDCFG_MASK << TLBIVMIDCFG_SHIFT) +#define CR_HUME (CR_HUME_MASK << CR_HUME_SHIFT) + + +/* ESR */ +#define CFG (CFG_MASK << CFG_SHIFT) +#define BYPASS (BYPASS_MASK << BYPASS_SHIFT) +#define ESR_MULTI (ESR_MULTI_MASK << ESR_MULTI_SHIFT) + + +/* ESYNR0 */ +#define ESYNR0_AMID (ESYNR0_AMID_MASK << ESYNR0_AMID_SHIFT) +#define ESYNR0_APID (ESYNR0_APID_MASK << ESYNR0_APID_SHIFT) +#define ESYNR0_ABID (ESYNR0_ABID_MASK << ESYNR0_ABID_SHIFT) +#define ESYNR0_AVMID (ESYNR0_AVMID_MASK << ESYNR0_AVMID_SHIFT) +#define ESYNR0_ATID (ESYNR0_ATID_MASK << ESYNR0_ATID_SHIFT) + + +/* ESYNR1 */ +#define ESYNR1_AMEMTYPE (ESYNR1_AMEMTYPE_MASK << ESYNR1_AMEMTYPE_SHIFT) +#define ESYNR1_ASHARED (ESYNR1_ASHARED_MASK << ESYNR1_ASHARED_SHIFT) +#define ESYNR1_AINNERSHARED (ESYNR1_AINNERSHARED_MASK<< \ + ESYNR1_AINNERSHARED_SHIFT) +#define ESYNR1_APRIV (ESYNR1_APRIV_MASK << ESYNR1_APRIV_SHIFT) +#define ESYNR1_APROTNS (ESYNR1_APROTNS_MASK << ESYNR1_APROTNS_SHIFT) +#define ESYNR1_AINST (ESYNR1_AINST_MASK << ESYNR1_AINST_SHIFT) +#define ESYNR1_AWRITE (ESYNR1_AWRITE_MASK << ESYNR1_AWRITE_SHIFT) +#define ESYNR1_ABURST (ESYNR1_ABURST_MASK << ESYNR1_ABURST_SHIFT) +#define ESYNR1_ALEN (ESYNR1_ALEN_MASK << ESYNR1_ALEN_SHIFT) +#define ESYNR1_ASIZE (ESYNR1_ASIZE_MASK << ESYNR1_ASIZE_SHIFT) +#define ESYNR1_ALOCK (ESYNR1_ALOCK_MASK << ESYNR1_ALOCK_SHIFT) +#define ESYNR1_AOOO (ESYNR1_AOOO_MASK << ESYNR1_AOOO_SHIFT) +#define ESYNR1_AFULL (ESYNR1_AFULL_MASK << ESYNR1_AFULL_SHIFT) +#define ESYNR1_AC (ESYNR1_AC_MASK << ESYNR1_AC_SHIFT) +#define ESYNR1_DCD (ESYNR1_DCD_MASK << ESYNR1_DCD_SHIFT) + + +/* IDR */ +#define NM2VCBMT (NM2VCBMT_MASK << NM2VCBMT_SHIFT) +#define HTW (HTW_MASK << HTW_SHIFT) +#define HUM (HUM_MASK << HUM_SHIFT) +#define TLBSIZE (TLBSIZE_MASK << TLBSIZE_SHIFT) +#define NCB (NCB_MASK << NCB_SHIFT) +#define NIRPT (NIRPT_MASK << NIRPT_SHIFT) + + +/* M2VCBRn */ +#define VMID (VMID_MASK << VMID_SHIFT) +#define CBNDX (CBNDX_MASK << CBNDX_SHIFT) +#define BYPASSD (BYPASSD_MASK << BYPASSD_SHIFT) +#define BPRCOSH (BPRCOSH_MASK << BPRCOSH_SHIFT) +#define BPRCISH (BPRCISH_MASK << BPRCISH_SHIFT) +#define BPRCNSH (BPRCNSH_MASK << BPRCNSH_SHIFT) +#define BPSHCFG (BPSHCFG_MASK << BPSHCFG_SHIFT) +#define NSCFG (NSCFG_MASK << NSCFG_SHIFT) +#define BPMTCFG (BPMTCFG_MASK << BPMTCFG_SHIFT) +#define BPMEMTYPE (BPMEMTYPE_MASK << BPMEMTYPE_SHIFT) + + +/* REV */ +#define IDR_MINOR (MINOR_MASK << MINOR_SHIFT) +#define IDR_MAJOR (MAJOR_MASK << MAJOR_SHIFT) + + +/* TESTBUSCR */ +#define TBE (TBE_MASK << TBE_SHIFT) +#define SPDMBE (SPDMBE_MASK << SPDMBE_SHIFT) +#define WGSEL (WGSEL_MASK << WGSEL_SHIFT) +#define TBLSEL (TBLSEL_MASK << TBLSEL_SHIFT) +#define TBHSEL (TBHSEL_MASK << TBHSEL_SHIFT) +#define SPDM0SEL (SPDM0SEL_MASK << SPDM0SEL_SHIFT) +#define SPDM1SEL (SPDM1SEL_MASK << SPDM1SEL_SHIFT) +#define SPDM2SEL (SPDM2SEL_MASK << SPDM2SEL_SHIFT) +#define SPDM3SEL (SPDM3SEL_MASK << SPDM3SEL_SHIFT) + + +/* TLBIVMID */ +#define TLBIVMID_VMID (TLBIVMID_VMID_MASK << TLBIVMID_VMID_SHIFT) + + +/* TLBRSW */ +#define TLBRSW_INDEX (TLBRSW_INDEX_MASK << TLBRSW_INDEX_SHIFT) +#define TLBBFBS (TLBBFBS_MASK << TLBBFBS_SHIFT) + + +/* TLBTR0 */ +#define PR (PR_MASK << PR_SHIFT) +#define PW (PW_MASK << PW_SHIFT) +#define UR (UR_MASK << UR_SHIFT) +#define UW (UW_MASK << UW_SHIFT) +#define XN (XN_MASK << XN_SHIFT) +#define NSDESC (NSDESC_MASK << NSDESC_SHIFT) +#define ISH (ISH_MASK << ISH_SHIFT) +#define SH (SH_MASK << SH_SHIFT) +#define MT (MT_MASK << MT_SHIFT) +#define DPSIZR (DPSIZR_MASK << DPSIZR_SHIFT) +#define DPSIZC (DPSIZC_MASK << DPSIZC_SHIFT) + + +/* TLBTR1 */ +#define TLBTR1_VMID (TLBTR1_VMID_MASK << TLBTR1_VMID_SHIFT) +#define TLBTR1_PA (TLBTR1_PA_MASK << TLBTR1_PA_SHIFT) + + +/* TLBTR2 */ +#define TLBTR2_ASID (TLBTR2_ASID_MASK << TLBTR2_ASID_SHIFT) +#define TLBTR2_V (TLBTR2_V_MASK << TLBTR2_V_SHIFT) +#define TLBTR2_NSTID (TLBTR2_NSTID_MASK << TLBTR2_NSTID_SHIFT) +#define TLBTR2_NV (TLBTR2_NV_MASK << TLBTR2_NV_SHIFT) +#define TLBTR2_VA (TLBTR2_VA_MASK << TLBTR2_VA_SHIFT) + + +/* Context Register Fields */ +/* ACTLR */ +#define CFERE (CFERE_MASK << CFERE_SHIFT) +#define CFEIE (CFEIE_MASK << CFEIE_SHIFT) +#define PTSHCFG (PTSHCFG_MASK << PTSHCFG_SHIFT) +#define RCOSH (RCOSH_MASK << RCOSH_SHIFT) +#define RCISH (RCISH_MASK << RCISH_SHIFT) +#define RCNSH (RCNSH_MASK << RCNSH_SHIFT) +#define PRIVCFG (PRIVCFG_MASK << PRIVCFG_SHIFT) +#define DNA (DNA_MASK << DNA_SHIFT) +#define DNLV2PA (DNLV2PA_MASK << DNLV2PA_SHIFT) +#define TLBMCFG (TLBMCFG_MASK << TLBMCFG_SHIFT) +#define CFCFG (CFCFG_MASK << CFCFG_SHIFT) +#define TIPCF (TIPCF_MASK << TIPCF_SHIFT) +#define V2PCFG (V2PCFG_MASK << V2PCFG_SHIFT) +#define HUME (HUME_MASK << HUME_SHIFT) +#define PTMTCFG (PTMTCFG_MASK << PTMTCFG_SHIFT) +#define PTMEMTYPE (PTMEMTYPE_MASK << PTMEMTYPE_SHIFT) + + +/* BFBCR */ +#define BFBDFE (BFBDFE_MASK << BFBDFE_SHIFT) +#define BFBSFE (BFBSFE_MASK << BFBSFE_SHIFT) +#define SFVS (SFVS_MASK << SFVS_SHIFT) +#define FLVIC (FLVIC_MASK << FLVIC_SHIFT) +#define SLVIC (SLVIC_MASK << SLVIC_SHIFT) + + +/* CONTEXTIDR */ +#define CONTEXTIDR_ASID (CONTEXTIDR_ASID_MASK << CONTEXTIDR_ASID_SHIFT) +#define PROCID (PROCID_MASK << PROCID_SHIFT) + + +/* FSR */ +#define TF (TF_MASK << TF_SHIFT) +#define AFF (AFF_MASK << AFF_SHIFT) +#define APF (APF_MASK << APF_SHIFT) +#define TLBMF (TLBMF_MASK << TLBMF_SHIFT) +#define HTWDEEF (HTWDEEF_MASK << HTWDEEF_SHIFT) +#define HTWSEEF (HTWSEEF_MASK << HTWSEEF_SHIFT) +#define MHF (MHF_MASK << MHF_SHIFT) +#define SL (SL_MASK << SL_SHIFT) +#define SS (SS_MASK << SS_SHIFT) +#define MULTI (MULTI_MASK << MULTI_SHIFT) + + +/* FSYNR0 */ +#define AMID (AMID_MASK << AMID_SHIFT) +#define APID (APID_MASK << APID_SHIFT) +#define ABID (ABID_MASK << ABID_SHIFT) +#define ATID (ATID_MASK << ATID_SHIFT) + + +/* FSYNR1 */ +#define AMEMTYPE (AMEMTYPE_MASK << AMEMTYPE_SHIFT) +#define ASHARED (ASHARED_MASK << ASHARED_SHIFT) +#define AINNERSHARED (AINNERSHARED_MASK << AINNERSHARED_SHIFT) +#define APRIV (APRIV_MASK << APRIV_SHIFT) +#define APROTNS (APROTNS_MASK << APROTNS_SHIFT) +#define AINST (AINST_MASK << AINST_SHIFT) +#define AWRITE (AWRITE_MASK << AWRITE_SHIFT) +#define ABURST (ABURST_MASK << ABURST_SHIFT) +#define ALEN (ALEN_MASK << ALEN_SHIFT) +#define FSYNR1_ASIZE (FSYNR1_ASIZE_MASK << FSYNR1_ASIZE_SHIFT) +#define ALOCK (ALOCK_MASK << ALOCK_SHIFT) +#define AFULL (AFULL_MASK << AFULL_SHIFT) + + +/* NMRR */ +#define ICPC0 (ICPC0_MASK << ICPC0_SHIFT) +#define ICPC1 (ICPC1_MASK << ICPC1_SHIFT) +#define ICPC2 (ICPC2_MASK << ICPC2_SHIFT) +#define ICPC3 (ICPC3_MASK << ICPC3_SHIFT) +#define ICPC4 (ICPC4_MASK << ICPC4_SHIFT) +#define ICPC5 (ICPC5_MASK << ICPC5_SHIFT) +#define ICPC6 (ICPC6_MASK << ICPC6_SHIFT) +#define ICPC7 (ICPC7_MASK << ICPC7_SHIFT) +#define OCPC0 (OCPC0_MASK << OCPC0_SHIFT) +#define OCPC1 (OCPC1_MASK << OCPC1_SHIFT) +#define OCPC2 (OCPC2_MASK << OCPC2_SHIFT) +#define OCPC3 (OCPC3_MASK << OCPC3_SHIFT) +#define OCPC4 (OCPC4_MASK << OCPC4_SHIFT) +#define OCPC5 (OCPC5_MASK << OCPC5_SHIFT) +#define OCPC6 (OCPC6_MASK << OCPC6_SHIFT) +#define OCPC7 (OCPC7_MASK << OCPC7_SHIFT) + + +/* PAR */ +#define FAULT (FAULT_MASK << FAULT_SHIFT) +/* If a fault is present, these are the +same as the fault fields in the FAR */ +#define FAULT_TF (FAULT_TF_MASK << FAULT_TF_SHIFT) +#define FAULT_AFF (FAULT_AFF_MASK << FAULT_AFF_SHIFT) +#define FAULT_APF (FAULT_APF_MASK << FAULT_APF_SHIFT) +#define FAULT_TLBMF (FAULT_TLBMF_MASK << FAULT_TLBMF_SHIFT) +#define FAULT_HTWDEEF (FAULT_HTWDEEF_MASK << FAULT_HTWDEEF_SHIFT) +#define FAULT_HTWSEEF (FAULT_HTWSEEF_MASK << FAULT_HTWSEEF_SHIFT) +#define FAULT_MHF (FAULT_MHF_MASK << FAULT_MHF_SHIFT) +#define FAULT_SL (FAULT_SL_MASK << FAULT_SL_SHIFT) +#define FAULT_SS (FAULT_SS_MASK << FAULT_SS_SHIFT) + +/* If NO fault is present, the following fields are in effect */ +/* (FAULT remains as before) */ +#define PAR_NOFAULT_SS (PAR_NOFAULT_SS_MASK << PAR_NOFAULT_SS_SHIFT) +#define PAR_NOFAULT_MT (PAR_NOFAULT_MT_MASK << PAR_NOFAULT_MT_SHIFT) +#define PAR_NOFAULT_SH (PAR_NOFAULT_SH_MASK << PAR_NOFAULT_SH_SHIFT) +#define PAR_NOFAULT_NS (PAR_NOFAULT_NS_MASK << PAR_NOFAULT_NS_SHIFT) +#define PAR_NOFAULT_NOS (PAR_NOFAULT_NOS_MASK << PAR_NOFAULT_NOS_SHIFT) +#define PAR_NPFAULT_PA (PAR_NPFAULT_PA_MASK << PAR_NPFAULT_PA_SHIFT) + + +/* PRRR */ +#define MTC0 (MTC0_MASK << MTC0_SHIFT) +#define MTC1 (MTC1_MASK << MTC1_SHIFT) +#define MTC2 (MTC2_MASK << MTC2_SHIFT) +#define MTC3 (MTC3_MASK << MTC3_SHIFT) +#define MTC4 (MTC4_MASK << MTC4_SHIFT) +#define MTC5 (MTC5_MASK << MTC5_SHIFT) +#define MTC6 (MTC6_MASK << MTC6_SHIFT) +#define MTC7 (MTC7_MASK << MTC7_SHIFT) +#define SHDSH0 (SHDSH0_MASK << SHDSH0_SHIFT) +#define SHDSH1 (SHDSH1_MASK << SHDSH1_SHIFT) +#define SHNMSH0 (SHNMSH0_MASK << SHNMSH0_SHIFT) +#define SHNMSH1 (SHNMSH1_MASK << SHNMSH1_SHIFT) +#define NOS0 (NOS0_MASK << NOS0_SHIFT) +#define NOS1 (NOS1_MASK << NOS1_SHIFT) +#define NOS2 (NOS2_MASK << NOS2_SHIFT) +#define NOS3 (NOS3_MASK << NOS3_SHIFT) +#define NOS4 (NOS4_MASK << NOS4_SHIFT) +#define NOS5 (NOS5_MASK << NOS5_SHIFT) +#define NOS6 (NOS6_MASK << NOS6_SHIFT) +#define NOS7 (NOS7_MASK << NOS7_SHIFT) + + +/* RESUME */ +#define TNR (TNR_MASK << TNR_SHIFT) + + +/* SCTLR */ +#define M (M_MASK << M_SHIFT) +#define TRE (TRE_MASK << TRE_SHIFT) +#define AFE (AFE_MASK << AFE_SHIFT) +#define HAF (HAF_MASK << HAF_SHIFT) +#define BE (BE_MASK << BE_SHIFT) +#define AFFD (AFFD_MASK << AFFD_SHIFT) + + +/* TLBIASID */ +#define TLBIASID_ASID (TLBIASID_ASID_MASK << TLBIASID_ASID_SHIFT) + + +/* TLBIVA */ +#define TLBIVA_ASID (TLBIVA_ASID_MASK << TLBIVA_ASID_SHIFT) +#define TLBIVA_VA (TLBIVA_VA_MASK << TLBIVA_VA_SHIFT) + + +/* TLBIVAA */ +#define TLBIVAA_VA (TLBIVAA_VA_MASK << TLBIVAA_VA_SHIFT) + + +/* TLBLCKR */ +#define LKE (LKE_MASK << LKE_SHIFT) +#define TLBLCKR_TLBIALLCFG (TLBLCKR_TLBIALLCFG_MASK<<TLBLCKR_TLBIALLCFG_SHIFT) +#define TLBIASIDCFG (TLBIASIDCFG_MASK << TLBIASIDCFG_SHIFT) +#define TLBIVAACFG (TLBIVAACFG_MASK << TLBIVAACFG_SHIFT) +#define FLOOR (FLOOR_MASK << FLOOR_SHIFT) +#define VICTIM (VICTIM_MASK << VICTIM_SHIFT) + + +/* TTBCR */ +#define N (N_MASK << N_SHIFT) +#define PD0 (PD0_MASK << PD0_SHIFT) +#define PD1 (PD1_MASK << PD1_SHIFT) + + +/* TTBR0 */ +#define TTBR0_IRGNH (TTBR0_IRGNH_MASK << TTBR0_IRGNH_SHIFT) +#define TTBR0_SH (TTBR0_SH_MASK << TTBR0_SH_SHIFT) +#define TTBR0_ORGN (TTBR0_ORGN_MASK << TTBR0_ORGN_SHIFT) +#define TTBR0_NOS (TTBR0_NOS_MASK << TTBR0_NOS_SHIFT) +#define TTBR0_IRGNL (TTBR0_IRGNL_MASK << TTBR0_IRGNL_SHIFT) +#define TTBR0_PA (TTBR0_PA_MASK << TTBR0_PA_SHIFT) + + +/* TTBR1 */ +#define TTBR1_IRGNH (TTBR1_IRGNH_MASK << TTBR1_IRGNH_SHIFT) +#define TTBR1_SH (TTBR1_SH_MASK << TTBR1_SH_SHIFT) +#define TTBR1_ORGN (TTBR1_ORGN_MASK << TTBR1_ORGN_SHIFT) +#define TTBR1_NOS (TTBR1_NOS_MASK << TTBR1_NOS_SHIFT) +#define TTBR1_IRGNL (TTBR1_IRGNL_MASK << TTBR1_IRGNL_SHIFT) +#define TTBR1_PA (TTBR1_PA_MASK << TTBR1_PA_SHIFT) + + +/* V2PSR */ +#define HIT (HIT_MASK << HIT_SHIFT) +#define INDEX (INDEX_MASK << INDEX_SHIFT) + + +/* V2Pxx */ +#define V2Pxx_INDEX (V2Pxx_INDEX_MASK << V2Pxx_INDEX_SHIFT) +#define V2Pxx_VA (V2Pxx_VA_MASK << V2Pxx_VA_SHIFT) + + +/* Global Register Masks */ +/* CBACRn */ +#define RWVMID_MASK 0x1F +#define RWE_MASK 0x01 +#define RWGE_MASK 0x01 +#define CBVMID_MASK 0x1F +#define IRPTNDX_MASK 0xFF + + +/* CR */ +#define RPUE_MASK 0x01 +#define RPUERE_MASK 0x01 +#define RPUEIE_MASK 0x01 +#define DCDEE_MASK 0x01 +#define CLIENTPD_MASK 0x01 +#define STALLD_MASK 0x01 +#define TLBLKCRWE_MASK 0x01 +#define CR_TLBIALLCFG_MASK 0x01 +#define TLBIVMIDCFG_MASK 0x01 +#define CR_HUME_MASK 0x01 + + +/* ESR */ +#define CFG_MASK 0x01 +#define BYPASS_MASK 0x01 +#define ESR_MULTI_MASK 0x01 + + +/* ESYNR0 */ +#define ESYNR0_AMID_MASK 0xFF +#define ESYNR0_APID_MASK 0x1F +#define ESYNR0_ABID_MASK 0x07 +#define ESYNR0_AVMID_MASK 0x1F +#define ESYNR0_ATID_MASK 0xFF + + +/* ESYNR1 */ +#define ESYNR1_AMEMTYPE_MASK 0x07 +#define ESYNR1_ASHARED_MASK 0x01 +#define ESYNR1_AINNERSHARED_MASK 0x01 +#define ESYNR1_APRIV_MASK 0x01 +#define ESYNR1_APROTNS_MASK 0x01 +#define ESYNR1_AINST_MASK 0x01 +#define ESYNR1_AWRITE_MASK 0x01 +#define ESYNR1_ABURST_MASK 0x01 +#define ESYNR1_ALEN_MASK 0x0F +#define ESYNR1_ASIZE_MASK 0x01 +#define ESYNR1_ALOCK_MASK 0x03 +#define ESYNR1_AOOO_MASK 0x01 +#define ESYNR1_AFULL_MASK 0x01 +#define ESYNR1_AC_MASK 0x01 +#define ESYNR1_DCD_MASK 0x01 + + +/* IDR */ +#define NM2VCBMT_MASK 0x1FF +#define HTW_MASK 0x01 +#define HUM_MASK 0x01 +#define TLBSIZE_MASK 0x0F +#define NCB_MASK 0xFF +#define NIRPT_MASK 0xFF + + +/* M2VCBRn */ +#define VMID_MASK 0x1F +#define CBNDX_MASK 0xFF +#define BYPASSD_MASK 0x01 +#define BPRCOSH_MASK 0x01 +#define BPRCISH_MASK 0x01 +#define BPRCNSH_MASK 0x01 +#define BPSHCFG_MASK 0x03 +#define NSCFG_MASK 0x03 +#define BPMTCFG_MASK 0x01 +#define BPMEMTYPE_MASK 0x07 + + +/* REV */ +#define MINOR_MASK 0x0F +#define MAJOR_MASK 0x0F + + +/* TESTBUSCR */ +#define TBE_MASK 0x01 +#define SPDMBE_MASK 0x01 +#define WGSEL_MASK 0x03 +#define TBLSEL_MASK 0x03 +#define TBHSEL_MASK 0x03 +#define SPDM0SEL_MASK 0x0F +#define SPDM1SEL_MASK 0x0F +#define SPDM2SEL_MASK 0x0F +#define SPDM3SEL_MASK 0x0F + + +/* TLBIMID */ +#define TLBIVMID_VMID_MASK 0x1F + + +/* TLBRSW */ +#define TLBRSW_INDEX_MASK 0xFF +#define TLBBFBS_MASK 0x03 + + +/* TLBTR0 */ +#define PR_MASK 0x01 +#define PW_MASK 0x01 +#define UR_MASK 0x01 +#define UW_MASK 0x01 +#define XN_MASK 0x01 +#define NSDESC_MASK 0x01 +#define ISH_MASK 0x01 +#define SH_MASK 0x01 +#define MT_MASK 0x07 +#define DPSIZR_MASK 0x07 +#define DPSIZC_MASK 0x07 + + +/* TLBTR1 */ +#define TLBTR1_VMID_MASK 0x1F +#define TLBTR1_PA_MASK 0x000FFFFF + + +/* TLBTR2 */ +#define TLBTR2_ASID_MASK 0xFF +#define TLBTR2_V_MASK 0x01 +#define TLBTR2_NSTID_MASK 0x01 +#define TLBTR2_NV_MASK 0x01 +#define TLBTR2_VA_MASK 0x000FFFFF + + +/* Global Register Shifts */ +/* CBACRn */ +#define RWVMID_SHIFT 0 +#define RWE_SHIFT 8 +#define RWGE_SHIFT 9 +#define CBVMID_SHIFT 16 +#define IRPTNDX_SHIFT 24 + + +/* CR */ +#define RPUE_SHIFT 0 +#define RPUERE_SHIFT 1 +#define RPUEIE_SHIFT 2 +#define DCDEE_SHIFT 3 +#define CLIENTPD_SHIFT 4 +#define STALLD_SHIFT 5 +#define TLBLKCRWE_SHIFT 6 +#define CR_TLBIALLCFG_SHIFT 7 +#define TLBIVMIDCFG_SHIFT 8 +#define CR_HUME_SHIFT 9 + + +/* ESR */ +#define CFG_SHIFT 0 +#define BYPASS_SHIFT 1 +#define ESR_MULTI_SHIFT 31 + + +/* ESYNR0 */ +#define ESYNR0_AMID_SHIFT 0 +#define ESYNR0_APID_SHIFT 8 +#define ESYNR0_ABID_SHIFT 13 +#define ESYNR0_AVMID_SHIFT 16 +#define ESYNR0_ATID_SHIFT 24 + + +/* ESYNR1 */ +#define ESYNR1_AMEMTYPE_SHIFT 0 +#define ESYNR1_ASHARED_SHIFT 3 +#define ESYNR1_AINNERSHARED_SHIFT 4 +#define ESYNR1_APRIV_SHIFT 5 +#define ESYNR1_APROTNS_SHIFT 6 +#define ESYNR1_AINST_SHIFT 7 +#define ESYNR1_AWRITE_SHIFT 8 +#define ESYNR1_ABURST_SHIFT 10 +#define ESYNR1_ALEN_SHIFT 12 +#define ESYNR1_ASIZE_SHIFT 16 +#define ESYNR1_ALOCK_SHIFT 20 +#define ESYNR1_AOOO_SHIFT 22 +#define ESYNR1_AFULL_SHIFT 24 +#define ESYNR1_AC_SHIFT 30 +#define ESYNR1_DCD_SHIFT 31 + + +/* IDR */ +#define NM2VCBMT_SHIFT 0 +#define HTW_SHIFT 9 +#define HUM_SHIFT 10 +#define TLBSIZE_SHIFT 12 +#define NCB_SHIFT 16 +#define NIRPT_SHIFT 24 + + +/* M2VCBRn */ +#define VMID_SHIFT 0 +#define CBNDX_SHIFT 8 +#define BYPASSD_SHIFT 16 +#define BPRCOSH_SHIFT 17 +#define BPRCISH_SHIFT 18 +#define BPRCNSH_SHIFT 19 +#define BPSHCFG_SHIFT 20 +#define NSCFG_SHIFT 22 +#define BPMTCFG_SHIFT 24 +#define BPMEMTYPE_SHIFT 25 + + +/* REV */ +#define MINOR_SHIFT 0 +#define MAJOR_SHIFT 4 + + +/* TESTBUSCR */ +#define TBE_SHIFT 0 +#define SPDMBE_SHIFT 1 +#define WGSEL_SHIFT 8 +#define TBLSEL_SHIFT 12 +#define TBHSEL_SHIFT 14 +#define SPDM0SEL_SHIFT 16 +#define SPDM1SEL_SHIFT 20 +#define SPDM2SEL_SHIFT 24 +#define SPDM3SEL_SHIFT 28 + + +/* TLBIMID */ +#define TLBIVMID_VMID_SHIFT 0 + + +/* TLBRSW */ +#define TLBRSW_INDEX_SHIFT 0 +#define TLBBFBS_SHIFT 8 + + +/* TLBTR0 */ +#define PR_SHIFT 0 +#define PW_SHIFT 1 +#define UR_SHIFT 2 +#define UW_SHIFT 3 +#define XN_SHIFT 4 +#define NSDESC_SHIFT 6 +#define ISH_SHIFT 7 +#define SH_SHIFT 8 +#define MT_SHIFT 9 +#define DPSIZR_SHIFT 16 +#define DPSIZC_SHIFT 20 + + +/* TLBTR1 */ +#define TLBTR1_VMID_SHIFT 0 +#define TLBTR1_PA_SHIFT 12 + + +/* TLBTR2 */ +#define TLBTR2_ASID_SHIFT 0 +#define TLBTR2_V_SHIFT 8 +#define TLBTR2_NSTID_SHIFT 9 +#define TLBTR2_NV_SHIFT 10 +#define TLBTR2_VA_SHIFT 12 + + +/* Context Register Masks */ +/* ACTLR */ +#define CFERE_MASK 0x01 +#define CFEIE_MASK 0x01 +#define PTSHCFG_MASK 0x03 +#define RCOSH_MASK 0x01 +#define RCISH_MASK 0x01 +#define RCNSH_MASK 0x01 +#define PRIVCFG_MASK 0x03 +#define DNA_MASK 0x01 +#define DNLV2PA_MASK 0x01 +#define TLBMCFG_MASK 0x03 +#define CFCFG_MASK 0x01 +#define TIPCF_MASK 0x01 +#define V2PCFG_MASK 0x03 +#define HUME_MASK 0x01 +#define PTMTCFG_MASK 0x01 +#define PTMEMTYPE_MASK 0x07 + + +/* BFBCR */ +#define BFBDFE_MASK 0x01 +#define BFBSFE_MASK 0x01 +#define SFVS_MASK 0x01 +#define FLVIC_MASK 0x0F +#define SLVIC_MASK 0x0F + + +/* CONTEXTIDR */ +#define CONTEXTIDR_ASID_MASK 0xFF +#define PROCID_MASK 0x00FFFFFF + + +/* FSR */ +#define TF_MASK 0x01 +#define AFF_MASK 0x01 +#define APF_MASK 0x01 +#define TLBMF_MASK 0x01 +#define HTWDEEF_MASK 0x01 +#define HTWSEEF_MASK 0x01 +#define MHF_MASK 0x01 +#define SL_MASK 0x01 +#define SS_MASK 0x01 +#define MULTI_MASK 0x01 + + +/* FSYNR0 */ +#define AMID_MASK 0xFF +#define APID_MASK 0x1F +#define ABID_MASK 0x07 +#define ATID_MASK 0xFF + + +/* FSYNR1 */ +#define AMEMTYPE_MASK 0x07 +#define ASHARED_MASK 0x01 +#define AINNERSHARED_MASK 0x01 +#define APRIV_MASK 0x01 +#define APROTNS_MASK 0x01 +#define AINST_MASK 0x01 +#define AWRITE_MASK 0x01 +#define ABURST_MASK 0x01 +#define ALEN_MASK 0x0F +#define FSYNR1_ASIZE_MASK 0x07 +#define ALOCK_MASK 0x03 +#define AFULL_MASK 0x01 + + +/* NMRR */ +#define ICPC0_MASK 0x03 +#define ICPC1_MASK 0x03 +#define ICPC2_MASK 0x03 +#define ICPC3_MASK 0x03 +#define ICPC4_MASK 0x03 +#define ICPC5_MASK 0x03 +#define ICPC6_MASK 0x03 +#define ICPC7_MASK 0x03 +#define OCPC0_MASK 0x03 +#define OCPC1_MASK 0x03 +#define OCPC2_MASK 0x03 +#define OCPC3_MASK 0x03 +#define OCPC4_MASK 0x03 +#define OCPC5_MASK 0x03 +#define OCPC6_MASK 0x03 +#define OCPC7_MASK 0x03 + + +/* PAR */ +#define FAULT_MASK 0x01 +/* If a fault is present, these are the +same as the fault fields in the FAR */ +#define FAULT_TF_MASK 0x01 +#define FAULT_AFF_MASK 0x01 +#define FAULT_APF_MASK 0x01 +#define FAULT_TLBMF_MASK 0x01 +#define FAULT_HTWDEEF_MASK 0x01 +#define FAULT_HTWSEEF_MASK 0x01 +#define FAULT_MHF_MASK 0x01 +#define FAULT_SL_MASK 0x01 +#define FAULT_SS_MASK 0x01 + +/* If NO fault is present, the following + * fields are in effect + * (FAULT remains as before) */ +#define PAR_NOFAULT_SS_MASK 0x01 +#define PAR_NOFAULT_MT_MASK 0x07 +#define PAR_NOFAULT_SH_MASK 0x01 +#define PAR_NOFAULT_NS_MASK 0x01 +#define PAR_NOFAULT_NOS_MASK 0x01 +#define PAR_NPFAULT_PA_MASK 0x000FFFFF + + +/* PRRR */ +#define MTC0_MASK 0x03 +#define MTC1_MASK 0x03 +#define MTC2_MASK 0x03 +#define MTC3_MASK 0x03 +#define MTC4_MASK 0x03 +#define MTC5_MASK 0x03 +#define MTC6_MASK 0x03 +#define MTC7_MASK 0x03 +#define SHDSH0_MASK 0x01 +#define SHDSH1_MASK 0x01 +#define SHNMSH0_MASK 0x01 +#define SHNMSH1_MASK 0x01 +#define NOS0_MASK 0x01 +#define NOS1_MASK 0x01 +#define NOS2_MASK 0x01 +#define NOS3_MASK 0x01 +#define NOS4_MASK 0x01 +#define NOS5_MASK 0x01 +#define NOS6_MASK 0x01 +#define NOS7_MASK 0x01 + + +/* RESUME */ +#define TNR_MASK 0x01 + + +/* SCTLR */ +#define M_MASK 0x01 +#define TRE_MASK 0x01 +#define AFE_MASK 0x01 +#define HAF_MASK 0x01 +#define BE_MASK 0x01 +#define AFFD_MASK 0x01 + + +/* TLBIASID */ +#define TLBIASID_ASID_MASK 0xFF + + +/* TLBIVA */ +#define TLBIVA_ASID_MASK 0xFF +#define TLBIVA_VA_MASK 0x000FFFFF + + +/* TLBIVAA */ +#define TLBIVAA_VA_MASK 0x000FFFFF + + +/* TLBLCKR */ +#define LKE_MASK 0x01 +#define TLBLCKR_TLBIALLCFG_MASK 0x01 +#define TLBIASIDCFG_MASK 0x01 +#define TLBIVAACFG_MASK 0x01 +#define FLOOR_MASK 0xFF +#define VICTIM_MASK 0xFF + + +/* TTBCR */ +#define N_MASK 0x07 +#define PD0_MASK 0x01 +#define PD1_MASK 0x01 + + +/* TTBR0 */ +#define TTBR0_IRGNH_MASK 0x01 +#define TTBR0_SH_MASK 0x01 +#define TTBR0_ORGN_MASK 0x03 +#define TTBR0_NOS_MASK 0x01 +#define TTBR0_IRGNL_MASK 0x01 +#define TTBR0_PA_MASK 0x0003FFFF + + +/* TTBR1 */ +#define TTBR1_IRGNH_MASK 0x01 +#define TTBR1_SH_MASK 0x01 +#define TTBR1_ORGN_MASK 0x03 +#define TTBR1_NOS_MASK 0x01 +#define TTBR1_IRGNL_MASK 0x01 +#define TTBR1_PA_MASK 0x0003FFFF + + +/* V2PSR */ +#define HIT_MASK 0x01 +#define INDEX_MASK 0xFF + + +/* V2Pxx */ +#define V2Pxx_INDEX_MASK 0xFF +#define V2Pxx_VA_MASK 0x000FFFFF + + +/* Context Register Shifts */ +/* ACTLR */ +#define CFERE_SHIFT 0 +#define CFEIE_SHIFT 1 +#define PTSHCFG_SHIFT 2 +#define RCOSH_SHIFT 4 +#define RCISH_SHIFT 5 +#define RCNSH_SHIFT 6 +#define PRIVCFG_SHIFT 8 +#define DNA_SHIFT 10 +#define DNLV2PA_SHIFT 11 +#define TLBMCFG_SHIFT 12 +#define CFCFG_SHIFT 14 +#define TIPCF_SHIFT 15 +#define V2PCFG_SHIFT 16 +#define HUME_SHIFT 18 +#define PTMTCFG_SHIFT 20 +#define PTMEMTYPE_SHIFT 21 + + +/* BFBCR */ +#define BFBDFE_SHIFT 0 +#define BFBSFE_SHIFT 1 +#define SFVS_SHIFT 2 +#define FLVIC_SHIFT 4 +#define SLVIC_SHIFT 8 + + +/* CONTEXTIDR */ +#define CONTEXTIDR_ASID_SHIFT 0 +#define PROCID_SHIFT 8 + + +/* FSR */ +#define TF_SHIFT 1 +#define AFF_SHIFT 2 +#define APF_SHIFT 3 +#define TLBMF_SHIFT 4 +#define HTWDEEF_SHIFT 5 +#define HTWSEEF_SHIFT 6 +#define MHF_SHIFT 7 +#define SL_SHIFT 16 +#define SS_SHIFT 30 +#define MULTI_SHIFT 31 + + +/* FSYNR0 */ +#define AMID_SHIFT 0 +#define APID_SHIFT 8 +#define ABID_SHIFT 13 +#define ATID_SHIFT 24 + + +/* FSYNR1 */ +#define AMEMTYPE_SHIFT 0 +#define ASHARED_SHIFT 3 +#define AINNERSHARED_SHIFT 4 +#define APRIV_SHIFT 5 +#define APROTNS_SHIFT 6 +#define AINST_SHIFT 7 +#define AWRITE_SHIFT 8 +#define ABURST_SHIFT 10 +#define ALEN_SHIFT 12 +#define FSYNR1_ASIZE_SHIFT 16 +#define ALOCK_SHIFT 20 +#define AFULL_SHIFT 24 + + +/* NMRR */ +#define ICPC0_SHIFT 0 +#define ICPC1_SHIFT 2 +#define ICPC2_SHIFT 4 +#define ICPC3_SHIFT 6 +#define ICPC4_SHIFT 8 +#define ICPC5_SHIFT 10 +#define ICPC6_SHIFT 12 +#define ICPC7_SHIFT 14 +#define OCPC0_SHIFT 16 +#define OCPC1_SHIFT 18 +#define OCPC2_SHIFT 20 +#define OCPC3_SHIFT 22 +#define OCPC4_SHIFT 24 +#define OCPC5_SHIFT 26 +#define OCPC6_SHIFT 28 +#define OCPC7_SHIFT 30 + + +/* PAR */ +#define FAULT_SHIFT 0 +/* If a fault is present, these are the +same as the fault fields in the FAR */ +#define FAULT_TF_SHIFT 1 +#define FAULT_AFF_SHIFT 2 +#define FAULT_APF_SHIFT 3 +#define FAULT_TLBMF_SHIFT 4 +#define FAULT_HTWDEEF_SHIFT 5 +#define FAULT_HTWSEEF_SHIFT 6 +#define FAULT_MHF_SHIFT 7 +#define FAULT_SL_SHIFT 16 +#define FAULT_SS_SHIFT 30 + +/* If NO fault is present, the following + * fields are in effect + * (FAULT remains as before) */ +#define PAR_NOFAULT_SS_SHIFT 1 +#define PAR_NOFAULT_MT_SHIFT 4 +#define PAR_NOFAULT_SH_SHIFT 7 +#define PAR_NOFAULT_NS_SHIFT 9 +#define PAR_NOFAULT_NOS_SHIFT 10 +#define PAR_NPFAULT_PA_SHIFT 12 + + +/* PRRR */ +#define MTC0_SHIFT 0 +#define MTC1_SHIFT 2 +#define MTC2_SHIFT 4 +#define MTC3_SHIFT 6 +#define MTC4_SHIFT 8 +#define MTC5_SHIFT 10 +#define MTC6_SHIFT 12 +#define MTC7_SHIFT 14 +#define SHDSH0_SHIFT 16 +#define SHDSH1_SHIFT 17 +#define SHNMSH0_SHIFT 18 +#define SHNMSH1_SHIFT 19 +#define NOS0_SHIFT 24 +#define NOS1_SHIFT 25 +#define NOS2_SHIFT 26 +#define NOS3_SHIFT 27 +#define NOS4_SHIFT 28 +#define NOS5_SHIFT 29 +#define NOS6_SHIFT 30 +#define NOS7_SHIFT 31 + + +/* RESUME */ +#define TNR_SHIFT 0 + + +/* SCTLR */ +#define M_SHIFT 0 +#define TRE_SHIFT 1 +#define AFE_SHIFT 2 +#define HAF_SHIFT 3 +#define BE_SHIFT 4 +#define AFFD_SHIFT 5 + + +/* TLBIASID */ +#define TLBIASID_ASID_SHIFT 0 + + +/* TLBIVA */ +#define TLBIVA_ASID_SHIFT 0 +#define TLBIVA_VA_SHIFT 12 + + +/* TLBIVAA */ +#define TLBIVAA_VA_SHIFT 12 + + +/* TLBLCKR */ +#define LKE_SHIFT 0 +#define TLBLCKR_TLBIALLCFG_SHIFT 1 +#define TLBIASIDCFG_SHIFT 2 +#define TLBIVAACFG_SHIFT 3 +#define FLOOR_SHIFT 8 +#define VICTIM_SHIFT 8 + + +/* TTBCR */ +#define N_SHIFT 3 +#define PD0_SHIFT 4 +#define PD1_SHIFT 5 + + +/* TTBR0 */ +#define TTBR0_IRGNH_SHIFT 0 +#define TTBR0_SH_SHIFT 1 +#define TTBR0_ORGN_SHIFT 3 +#define TTBR0_NOS_SHIFT 5 +#define TTBR0_IRGNL_SHIFT 6 +#define TTBR0_PA_SHIFT 14 + + +/* TTBR1 */ +#define TTBR1_IRGNH_SHIFT 0 +#define TTBR1_SH_SHIFT 1 +#define TTBR1_ORGN_SHIFT 3 +#define TTBR1_NOS_SHIFT 5 +#define TTBR1_IRGNL_SHIFT 6 +#define TTBR1_PA_SHIFT 14 + + +/* V2PSR */ +#define HIT_SHIFT 0 +#define INDEX_SHIFT 8 + + +/* V2Pxx */ +#define V2Pxx_INDEX_SHIFT 0 +#define V2Pxx_VA_SHIFT 12 + +#endif diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index ee249bc959f..e550ccb7634 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c @@ -20,6 +20,7 @@ #include <linux/export.h> #include <linux/limits.h> #include <linux/of.h> +#include <linux/of_iommu.h> /** * of_get_dma_window - Parse *dma-window property and returns 0 if found. diff --git a/drivers/iommu/omap-iommu-debug.c b/drivers/iommu/omap-iommu-debug.c index d97fbe4fb9b..80fffba7f12 100644 --- a/drivers/iommu/omap-iommu-debug.c +++ b/drivers/iommu/omap-iommu-debug.c @@ -354,8 +354,8 @@ DEBUG_FOPS(mem); return -ENOMEM; \ } -#define DEBUG_ADD_FILE(name) __DEBUG_ADD_FILE(name, 600) -#define DEBUG_ADD_FILE_RO(name) __DEBUG_ADD_FILE(name, 400) +#define DEBUG_ADD_FILE(name) __DEBUG_ADD_FILE(name, 0600) +#define DEBUG_ADD_FILE_RO(name) __DEBUG_ADD_FILE(name, 0400) static int iommu_debug_register(struct device *dev, void *data) { diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index d33c980e9c2..895af06a667 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -23,6 +23,9 @@ #include <linux/spinlock.h> #include <linux/io.h> #include <linux/pm_runtime.h> +#include <linux/of.h> +#include <linux/of_iommu.h> +#include <linux/of_irq.h> #include <asm/cacheflush.h> @@ -31,6 +34,9 @@ #include "omap-iopgtable.h" #include "omap-iommu.h" +#define to_iommu(dev) \ + ((struct omap_iommu *)platform_get_drvdata(to_platform_device(dev))) + #define for_each_iotlb_cr(obj, n, __i, cr) \ for (__i = 0; \ (__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true); \ @@ -146,13 +152,10 @@ static int iommu_enable(struct omap_iommu *obj) struct platform_device *pdev = to_platform_device(obj->dev); struct iommu_platform_data *pdata = pdev->dev.platform_data; - if (!obj || !pdata) - return -EINVAL; - if (!arch_iommu) return -ENODEV; - if (pdata->deassert_reset) { + if (pdata && pdata->deassert_reset) { err = pdata->deassert_reset(pdev, pdata->reset_name); if (err) { dev_err(obj->dev, "deassert_reset failed: %d\n", err); @@ -172,14 +175,11 @@ static void iommu_disable(struct omap_iommu *obj) struct platform_device *pdev = to_platform_device(obj->dev); struct iommu_platform_data *pdata = pdev->dev.platform_data; - if (!obj || !pdata) - return; - arch_iommu->disable(obj); pm_runtime_put_sync(obj->dev); - if (pdata->assert_reset) + if (pdata && pdata->assert_reset) pdata->assert_reset(pdev, pdata->reset_name); } @@ -394,6 +394,7 @@ static void flush_iotlb_page(struct omap_iommu *obj, u32 da) __func__, start, da, bytes); iotlb_load_cr(obj, &cr); iommu_write_reg(obj, 1, MMU_FLUSH_ENTRY); + break; } } pm_runtime_put_sync(obj->dev); @@ -523,7 +524,8 @@ static void flush_iopte_range(u32 *first, u32 *last) static void iopte_free(u32 *iopte) { /* Note: freed iopte's must be clean ready for re-use */ - kmem_cache_free(iopte_cachep, iopte); + if (iopte) + kmem_cache_free(iopte_cachep, iopte); } static u32 *iopte_alloc(struct omap_iommu *obj, u32 *iopgd, u32 da) @@ -833,16 +835,15 @@ static irqreturn_t iommu_fault_handler(int irq, void *data) iopgd = iopgd_offset(obj, da); if (!iopgd_is_table(*iopgd)) { - dev_err(obj->dev, "%s: errs:0x%08x da:0x%08x pgd:0x%p " - "*pgd:px%08x\n", obj->name, errs, da, iopgd, *iopgd); + dev_err(obj->dev, "%s: errs:0x%08x da:0x%08x pgd:0x%p *pgd:px%08x\n", + obj->name, errs, da, iopgd, *iopgd); return IRQ_NONE; } iopte = iopte_offset(iopgd, da); - dev_err(obj->dev, "%s: errs:0x%08x da:0x%08x pgd:0x%p *pgd:0x%08x " - "pte:0x%p *pte:0x%08x\n", obj->name, errs, da, iopgd, *iopgd, - iopte, *iopte); + dev_err(obj->dev, "%s: errs:0x%08x da:0x%08x pgd:0x%p *pgd:0x%08x pte:0x%p *pte:0x%08x\n", + obj->name, errs, da, iopgd, *iopgd, iopte, *iopte); return IRQ_NONE; } @@ -864,7 +865,7 @@ static int device_match_by_alias(struct device *dev, void *data) **/ static struct omap_iommu *omap_iommu_attach(const char *name, u32 *iopgd) { - int err = -ENOMEM; + int err; struct device *dev; struct omap_iommu *obj; @@ -872,7 +873,7 @@ static struct omap_iommu *omap_iommu_attach(const char *name, u32 *iopgd) (void *)name, device_match_by_alias); if (!dev) - return NULL; + return ERR_PTR(-ENODEV); obj = to_iommu(dev); @@ -891,8 +892,10 @@ static struct omap_iommu *omap_iommu_attach(const char *name, u32 *iopgd) goto err_enable; flush_iotlb_all(obj); - if (!try_module_get(obj->owner)) + if (!try_module_get(obj->owner)) { + err = -ENODEV; goto err_module; + } spin_unlock(&obj->iommu_lock); @@ -941,17 +944,41 @@ static int omap_iommu_probe(struct platform_device *pdev) struct omap_iommu *obj; struct resource *res; struct iommu_platform_data *pdata = pdev->dev.platform_data; + struct device_node *of = pdev->dev.of_node; - obj = kzalloc(sizeof(*obj) + MMU_REG_SIZE, GFP_KERNEL); + obj = devm_kzalloc(&pdev->dev, sizeof(*obj) + MMU_REG_SIZE, GFP_KERNEL); if (!obj) return -ENOMEM; - obj->nr_tlb_entries = pdata->nr_tlb_entries; - obj->name = pdata->name; + if (of) { + obj->name = dev_name(&pdev->dev); + obj->nr_tlb_entries = 32; + err = of_property_read_u32(of, "ti,#tlb-entries", + &obj->nr_tlb_entries); + if (err && err != -EINVAL) + return err; + if (obj->nr_tlb_entries != 32 && obj->nr_tlb_entries != 8) + return -EINVAL; + /* + * da_start and da_end are needed for omap-iovmm, so hardcode + * these values as used by OMAP3 ISP - the only user for + * omap-iovmm + */ + obj->da_start = 0; + obj->da_end = 0xfffff000; + if (of_find_property(of, "ti,iommu-bus-err-back", NULL)) + obj->has_bus_err_back = MMU_GP_REG_BUS_ERR_BACK_EN; + } else { + obj->nr_tlb_entries = pdata->nr_tlb_entries; + obj->name = pdata->name; + obj->da_start = pdata->da_start; + obj->da_end = pdata->da_end; + } + if (obj->da_end <= obj->da_start) + return -EINVAL; + obj->dev = &pdev->dev; obj->ctx = (void *)obj + sizeof(*obj); - obj->da_start = pdata->da_start; - obj->da_end = pdata->da_end; spin_lock_init(&obj->iommu_lock); mutex_init(&obj->mmap_lock); @@ -959,33 +986,18 @@ static int omap_iommu_probe(struct platform_device *pdev) INIT_LIST_HEAD(&obj->mmap); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - err = -ENODEV; - goto err_mem; - } - - res = request_mem_region(res->start, resource_size(res), - dev_name(&pdev->dev)); - if (!res) { - err = -EIO; - goto err_mem; - } - - obj->regbase = ioremap(res->start, resource_size(res)); - if (!obj->regbase) { - err = -ENOMEM; - goto err_ioremap; - } + obj->regbase = devm_ioremap_resource(obj->dev, res); + if (IS_ERR(obj->regbase)) + return PTR_ERR(obj->regbase); irq = platform_get_irq(pdev, 0); - if (irq < 0) { - err = -ENODEV; - goto err_irq; - } - err = request_irq(irq, iommu_fault_handler, IRQF_SHARED, - dev_name(&pdev->dev), obj); + if (irq < 0) + return -ENODEV; + + err = devm_request_irq(obj->dev, irq, iommu_fault_handler, IRQF_SHARED, + dev_name(obj->dev), obj); if (err < 0) - goto err_irq; + return err; platform_set_drvdata(pdev, obj); pm_runtime_irq_safe(obj->dev); @@ -993,44 +1005,34 @@ static int omap_iommu_probe(struct platform_device *pdev) dev_info(&pdev->dev, "%s registered\n", obj->name); return 0; - -err_irq: - iounmap(obj->regbase); -err_ioremap: - release_mem_region(res->start, resource_size(res)); -err_mem: - kfree(obj); - return err; } static int omap_iommu_remove(struct platform_device *pdev) { - int irq; - struct resource *res; struct omap_iommu *obj = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); - iopgtable_clear_entry_all(obj); - irq = platform_get_irq(pdev, 0); - free_irq(irq, obj); - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(res->start, resource_size(res)); - iounmap(obj->regbase); - pm_runtime_disable(obj->dev); dev_info(&pdev->dev, "%s removed\n", obj->name); - kfree(obj); return 0; } +static struct of_device_id omap_iommu_of_match[] = { + { .compatible = "ti,omap2-iommu" }, + { .compatible = "ti,omap4-iommu" }, + { .compatible = "ti,dra7-iommu" }, + {}, +}; +MODULE_DEVICE_TABLE(of, omap_iommu_of_match); + static struct platform_driver omap_iommu_driver = { .probe = omap_iommu_probe, .remove = omap_iommu_remove, .driver = { .name = "omap-iommu", + .of_match_table = of_match_ptr(omap_iommu_of_match), }, }; @@ -1039,19 +1041,18 @@ static void iopte_cachep_ctor(void *iopte) clean_dcache_area(iopte, IOPTE_TABLE_SIZE); } -static u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa, - u32 flags) +static u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa, int pgsz) { memset(e, 0, sizeof(*e)); e->da = da; e->pa = pa; - e->valid = 1; + e->valid = MMU_CAM_V; /* FIXME: add OMAP1 support */ - e->pgsz = flags & MMU_CAM_PGSZ_MASK; - e->endian = flags & MMU_RAM_ENDIAN_MASK; - e->elsz = flags & MMU_RAM_ELSZ_MASK; - e->mixed = flags & MMU_RAM_MIXED_MASK; + e->pgsz = pgsz; + e->endian = MMU_RAM_ENDIAN_LITTLE; + e->elsz = MMU_RAM_ELSZ_8; + e->mixed = 0; return iopgsz_to_bytes(e->pgsz); } @@ -1064,9 +1065,8 @@ static int omap_iommu_map(struct iommu_domain *domain, unsigned long da, struct device *dev = oiommu->dev; struct iotlb_entry e; int omap_pgsz; - u32 ret, flags; + u32 ret; - /* we only support mapping a single iommu page for now */ omap_pgsz = bytes_to_iopgsz(bytes); if (omap_pgsz < 0) { dev_err(dev, "invalid size to map: %d\n", bytes); @@ -1075,9 +1075,7 @@ static int omap_iommu_map(struct iommu_domain *domain, unsigned long da, dev_dbg(dev, "mapping da 0x%lx to pa 0x%x size 0x%x\n", da, pa, bytes); - flags = omap_pgsz | prot; - - iotlb_init_entry(&e, da, pa, flags); + iotlb_init_entry(&e, da, pa, omap_pgsz); ret = omap_iopgtable_store_entry(oiommu, &e); if (ret) @@ -1219,7 +1217,7 @@ static void omap_iommu_domain_destroy(struct iommu_domain *domain) } static phys_addr_t omap_iommu_iova_to_phys(struct iommu_domain *domain, - unsigned long da) + dma_addr_t da) { struct omap_iommu_domain *omap_domain = domain->priv; struct omap_iommu *oiommu = omap_domain->iommu_dev; @@ -1235,25 +1233,64 @@ static phys_addr_t omap_iommu_iova_to_phys(struct iommu_domain *domain, else if (iopte_is_large(*pte)) ret = omap_iommu_translate(*pte, da, IOLARGE_MASK); else - dev_err(dev, "bogus pte 0x%x, da 0x%lx", *pte, da); + dev_err(dev, "bogus pte 0x%x, da 0x%llx", *pte, + (unsigned long long)da); } else { if (iopgd_is_section(*pgd)) ret = omap_iommu_translate(*pgd, da, IOSECTION_MASK); else if (iopgd_is_super(*pgd)) ret = omap_iommu_translate(*pgd, da, IOSUPER_MASK); else - dev_err(dev, "bogus pgd 0x%x, da 0x%lx", *pgd, da); + dev_err(dev, "bogus pgd 0x%x, da 0x%llx", *pgd, + (unsigned long long)da); } return ret; } -static int omap_iommu_domain_has_cap(struct iommu_domain *domain, - unsigned long cap) +static int omap_iommu_add_device(struct device *dev) { + struct omap_iommu_arch_data *arch_data; + struct device_node *np; + + /* + * Allocate the archdata iommu structure for DT-based devices. + * + * TODO: Simplify this when removing non-DT support completely from the + * IOMMU users. + */ + if (!dev->of_node) + return 0; + + np = of_parse_phandle(dev->of_node, "iommus", 0); + if (!np) + return 0; + + arch_data = kzalloc(sizeof(*arch_data), GFP_KERNEL); + if (!arch_data) { + of_node_put(np); + return -ENOMEM; + } + + arch_data->name = kstrdup(dev_name(dev), GFP_KERNEL); + dev->archdata.iommu = arch_data; + + of_node_put(np); + return 0; } +static void omap_iommu_remove_device(struct device *dev) +{ + struct omap_iommu_arch_data *arch_data = dev->archdata.iommu; + + if (!dev->of_node || !arch_data) + return; + + kfree(arch_data->name); + kfree(arch_data); +} + static struct iommu_ops omap_iommu_ops = { .domain_init = omap_iommu_domain_init, .domain_destroy = omap_iommu_domain_destroy, @@ -1262,7 +1299,8 @@ static struct iommu_ops omap_iommu_ops = { .map = omap_iommu_map, .unmap = omap_iommu_unmap, .iova_to_phys = omap_iommu_iova_to_phys, - .domain_has_cap = omap_iommu_domain_has_cap, + .add_device = omap_iommu_add_device, + .remove_device = omap_iommu_remove_device, .pgsize_bitmap = OMAP_IOMMU_PGSIZES, }; diff --git a/drivers/iommu/omap-iommu.h b/drivers/iommu/omap-iommu.h index 12008420660..ea920c3e94f 100644 --- a/drivers/iommu/omap-iommu.h +++ b/drivers/iommu/omap-iommu.h @@ -52,6 +52,8 @@ struct omap_iommu { void *ctx; /* iommu context: registres saved area */ u32 da_start; u32 da_end; + + int has_bus_err_back; }; struct cr_regs { @@ -130,6 +132,7 @@ static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev) #define MMU_READ_CAM 0x68 #define MMU_READ_RAM 0x6c #define MMU_EMU_FAULT_AD 0x70 +#define MMU_GP_REG 0x88 #define MMU_REG_SIZE 256 @@ -163,6 +166,8 @@ static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev) #define MMU_RAM_MIXED_MASK (1 << MMU_RAM_MIXED_SHIFT) #define MMU_RAM_MIXED MMU_RAM_MIXED_MASK +#define MMU_GP_REG_BUS_ERR_BACK_EN 0x1 + /* * utilities for super page(16MB, 1MB, 64KB and 4KB) */ diff --git a/drivers/iommu/omap-iommu2.c b/drivers/iommu/omap-iommu2.c index d745094a69d..5e1ea3b0bf1 100644 --- a/drivers/iommu/omap-iommu2.c +++ b/drivers/iommu/omap-iommu2.c @@ -98,6 +98,9 @@ static int omap2_iommu_enable(struct omap_iommu *obj) iommu_write_reg(obj, pa, MMU_TTB); + if (obj->has_bus_err_back) + iommu_write_reg(obj, MMU_GP_REG_BUS_ERR_BACK_EN, MMU_GP_REG); + __iommu_set_twl(obj, true); return 0; diff --git a/drivers/iommu/omap-iopgtable.h b/drivers/iommu/omap-iopgtable.h index cd4ae9e5b0c..f891683e3f0 100644 --- a/drivers/iommu/omap-iopgtable.h +++ b/drivers/iommu/omap-iopgtable.h @@ -93,6 +93,3 @@ static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask) /* to find an entry in the second-level page table. */ #define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1)) #define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da)) - -#define to_iommu(dev) \ - (struct omap_iommu *)platform_get_drvdata(to_platform_device(dev)) diff --git a/drivers/iommu/omap-iovmm.c b/drivers/iommu/omap-iovmm.c index 46d87569073..d1472598415 100644 --- a/drivers/iommu/omap-iovmm.c +++ b/drivers/iommu/omap-iovmm.c @@ -102,8 +102,8 @@ static size_t sgtable_len(const struct sg_table *sgt) } if (i && sg->offset) { - pr_err("%s: sg[%d] offset not allowed in internal " - "entries\n", __func__, i); + pr_err("%s: sg[%d] offset not allowed in internal entries\n", + __func__, i); return 0; } diff --git a/drivers/iommu/pci.h b/drivers/iommu/pci.h new file mode 100644 index 00000000000..352d80ae744 --- /dev/null +++ b/drivers/iommu/pci.h @@ -0,0 +1,29 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright (C) 2013 Red Hat, Inc. + * Copyright (C) 2013 Freescale Semiconductor, Inc. + * + */ +#ifndef __IOMMU_PCI_H +#define __IOMMU_PCI_H + +/* Helper function for swapping pci device reference */ +static inline void swap_pci_ref(struct pci_dev **from, struct pci_dev *to) +{ + pci_dev_put(*from); + *from = to; +} + +#endif /* __IOMMU_PCI_H */ diff --git a/drivers/iommu/shmobile-iommu.c b/drivers/iommu/shmobile-iommu.c new file mode 100644 index 00000000000..464acda0bbc --- /dev/null +++ b/drivers/iommu/shmobile-iommu.c @@ -0,0 +1,394 @@ +/* + * IOMMU for IPMMU/IPMMUI + * Copyright (C) 2012 Hideki EIRAKU + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + */ + +#include <linux/dma-mapping.h> +#include <linux/io.h> +#include <linux/iommu.h> +#include <linux/platform_device.h> +#include <linux/sizes.h> +#include <linux/slab.h> +#include <asm/dma-iommu.h> +#include "shmobile-ipmmu.h" + +#define L1_SIZE CONFIG_SHMOBILE_IOMMU_L1SIZE +#define L1_LEN (L1_SIZE / 4) +#define L1_ALIGN L1_SIZE +#define L2_SIZE SZ_1K +#define L2_LEN (L2_SIZE / 4) +#define L2_ALIGN L2_SIZE + +struct shmobile_iommu_domain_pgtable { + uint32_t *pgtable; + dma_addr_t handle; +}; + +struct shmobile_iommu_archdata { + struct list_head attached_list; + struct dma_iommu_mapping *iommu_mapping; + spinlock_t attach_lock; + struct shmobile_iommu_domain *attached; + int num_attached_devices; + struct shmobile_ipmmu *ipmmu; +}; + +struct shmobile_iommu_domain { + struct shmobile_iommu_domain_pgtable l1, l2[L1_LEN]; + spinlock_t map_lock; + spinlock_t attached_list_lock; + struct list_head attached_list; +}; + +static struct shmobile_iommu_archdata *ipmmu_archdata; +static struct kmem_cache *l1cache, *l2cache; + +static int pgtable_alloc(struct shmobile_iommu_domain_pgtable *pgtable, + struct kmem_cache *cache, size_t size) +{ + pgtable->pgtable = kmem_cache_zalloc(cache, GFP_ATOMIC); + if (!pgtable->pgtable) + return -ENOMEM; + pgtable->handle = dma_map_single(NULL, pgtable->pgtable, size, + DMA_TO_DEVICE); + return 0; +} + +static void pgtable_free(struct shmobile_iommu_domain_pgtable *pgtable, + struct kmem_cache *cache, size_t size) +{ + dma_unmap_single(NULL, pgtable->handle, size, DMA_TO_DEVICE); + kmem_cache_free(cache, pgtable->pgtable); +} + +static uint32_t pgtable_read(struct shmobile_iommu_domain_pgtable *pgtable, + unsigned int index) +{ + return pgtable->pgtable[index]; +} + +static void pgtable_write(struct shmobile_iommu_domain_pgtable *pgtable, + unsigned int index, unsigned int count, uint32_t val) +{ + unsigned int i; + + for (i = 0; i < count; i++) + pgtable->pgtable[index + i] = val; + dma_sync_single_for_device(NULL, pgtable->handle + index * sizeof(val), + sizeof(val) * count, DMA_TO_DEVICE); +} + +static int shmobile_iommu_domain_init(struct iommu_domain *domain) +{ + struct shmobile_iommu_domain *sh_domain; + int i, ret; + + sh_domain = kmalloc(sizeof(*sh_domain), GFP_KERNEL); + if (!sh_domain) + return -ENOMEM; + ret = pgtable_alloc(&sh_domain->l1, l1cache, L1_SIZE); + if (ret < 0) { + kfree(sh_domain); + return ret; + } + for (i = 0; i < L1_LEN; i++) + sh_domain->l2[i].pgtable = NULL; + spin_lock_init(&sh_domain->map_lock); + spin_lock_init(&sh_domain->attached_list_lock); + INIT_LIST_HEAD(&sh_domain->attached_list); + domain->priv = sh_domain; + return 0; +} + +static void shmobile_iommu_domain_destroy(struct iommu_domain *domain) +{ + struct shmobile_iommu_domain *sh_domain = domain->priv; + int i; + + for (i = 0; i < L1_LEN; i++) { + if (sh_domain->l2[i].pgtable) + pgtable_free(&sh_domain->l2[i], l2cache, L2_SIZE); + } + pgtable_free(&sh_domain->l1, l1cache, L1_SIZE); + kfree(sh_domain); + domain->priv = NULL; +} + +static int shmobile_iommu_attach_device(struct iommu_domain *domain, + struct device *dev) +{ + struct shmobile_iommu_archdata *archdata = dev->archdata.iommu; + struct shmobile_iommu_domain *sh_domain = domain->priv; + int ret = -EBUSY; + + if (!archdata) + return -ENODEV; + spin_lock(&sh_domain->attached_list_lock); + spin_lock(&archdata->attach_lock); + if (archdata->attached != sh_domain) { + if (archdata->attached) + goto err; + ipmmu_tlb_set(archdata->ipmmu, sh_domain->l1.handle, L1_SIZE, + 0); + ipmmu_tlb_flush(archdata->ipmmu); + archdata->attached = sh_domain; + archdata->num_attached_devices = 0; + list_add(&archdata->attached_list, &sh_domain->attached_list); + } + archdata->num_attached_devices++; + ret = 0; +err: + spin_unlock(&archdata->attach_lock); + spin_unlock(&sh_domain->attached_list_lock); + return ret; +} + +static void shmobile_iommu_detach_device(struct iommu_domain *domain, + struct device *dev) +{ + struct shmobile_iommu_archdata *archdata = dev->archdata.iommu; + struct shmobile_iommu_domain *sh_domain = domain->priv; + + if (!archdata) + return; + spin_lock(&sh_domain->attached_list_lock); + spin_lock(&archdata->attach_lock); + archdata->num_attached_devices--; + if (!archdata->num_attached_devices) { + ipmmu_tlb_set(archdata->ipmmu, 0, 0, 0); + ipmmu_tlb_flush(archdata->ipmmu); + archdata->attached = NULL; + list_del(&archdata->attached_list); + } + spin_unlock(&archdata->attach_lock); + spin_unlock(&sh_domain->attached_list_lock); +} + +static void domain_tlb_flush(struct shmobile_iommu_domain *sh_domain) +{ + struct shmobile_iommu_archdata *archdata; + + spin_lock(&sh_domain->attached_list_lock); + list_for_each_entry(archdata, &sh_domain->attached_list, attached_list) + ipmmu_tlb_flush(archdata->ipmmu); + spin_unlock(&sh_domain->attached_list_lock); +} + +static int l2alloc(struct shmobile_iommu_domain *sh_domain, + unsigned int l1index) +{ + int ret; + + if (!sh_domain->l2[l1index].pgtable) { + ret = pgtable_alloc(&sh_domain->l2[l1index], l2cache, L2_SIZE); + if (ret < 0) + return ret; + } + pgtable_write(&sh_domain->l1, l1index, 1, + sh_domain->l2[l1index].handle | 0x1); + return 0; +} + +static void l2realfree(struct shmobile_iommu_domain_pgtable *l2) +{ + if (l2->pgtable) + pgtable_free(l2, l2cache, L2_SIZE); +} + +static void l2free(struct shmobile_iommu_domain *sh_domain, + unsigned int l1index, + struct shmobile_iommu_domain_pgtable *l2) +{ + pgtable_write(&sh_domain->l1, l1index, 1, 0); + if (sh_domain->l2[l1index].pgtable) { + *l2 = sh_domain->l2[l1index]; + sh_domain->l2[l1index].pgtable = NULL; + } +} + +static int shmobile_iommu_map(struct iommu_domain *domain, unsigned long iova, + phys_addr_t paddr, size_t size, int prot) +{ + struct shmobile_iommu_domain_pgtable l2 = { .pgtable = NULL }; + struct shmobile_iommu_domain *sh_domain = domain->priv; + unsigned int l1index, l2index; + int ret; + + l1index = iova >> 20; + switch (size) { + case SZ_4K: + l2index = (iova >> 12) & 0xff; + spin_lock(&sh_domain->map_lock); + ret = l2alloc(sh_domain, l1index); + if (!ret) + pgtable_write(&sh_domain->l2[l1index], l2index, 1, + paddr | 0xff2); + spin_unlock(&sh_domain->map_lock); + break; + case SZ_64K: + l2index = (iova >> 12) & 0xf0; + spin_lock(&sh_domain->map_lock); + ret = l2alloc(sh_domain, l1index); + if (!ret) + pgtable_write(&sh_domain->l2[l1index], l2index, 0x10, + paddr | 0xff1); + spin_unlock(&sh_domain->map_lock); + break; + case SZ_1M: + spin_lock(&sh_domain->map_lock); + l2free(sh_domain, l1index, &l2); + pgtable_write(&sh_domain->l1, l1index, 1, paddr | 0xc02); + spin_unlock(&sh_domain->map_lock); + ret = 0; + break; + default: + ret = -EINVAL; + } + if (!ret) + domain_tlb_flush(sh_domain); + l2realfree(&l2); + return ret; +} + +static size_t shmobile_iommu_unmap(struct iommu_domain *domain, + unsigned long iova, size_t size) +{ + struct shmobile_iommu_domain_pgtable l2 = { .pgtable = NULL }; + struct shmobile_iommu_domain *sh_domain = domain->priv; + unsigned int l1index, l2index; + uint32_t l2entry = 0; + size_t ret = 0; + + l1index = iova >> 20; + if (!(iova & 0xfffff) && size >= SZ_1M) { + spin_lock(&sh_domain->map_lock); + l2free(sh_domain, l1index, &l2); + spin_unlock(&sh_domain->map_lock); + ret = SZ_1M; + goto done; + } + l2index = (iova >> 12) & 0xff; + spin_lock(&sh_domain->map_lock); + if (sh_domain->l2[l1index].pgtable) + l2entry = pgtable_read(&sh_domain->l2[l1index], l2index); + switch (l2entry & 3) { + case 1: + if (l2index & 0xf) + break; + pgtable_write(&sh_domain->l2[l1index], l2index, 0x10, 0); + ret = SZ_64K; + break; + case 2: + pgtable_write(&sh_domain->l2[l1index], l2index, 1, 0); + ret = SZ_4K; + break; + } + spin_unlock(&sh_domain->map_lock); +done: + if (ret) + domain_tlb_flush(sh_domain); + l2realfree(&l2); + return ret; +} + +static phys_addr_t shmobile_iommu_iova_to_phys(struct iommu_domain *domain, + dma_addr_t iova) +{ + struct shmobile_iommu_domain *sh_domain = domain->priv; + uint32_t l1entry = 0, l2entry = 0; + unsigned int l1index, l2index; + + l1index = iova >> 20; + l2index = (iova >> 12) & 0xff; + spin_lock(&sh_domain->map_lock); + if (sh_domain->l2[l1index].pgtable) + l2entry = pgtable_read(&sh_domain->l2[l1index], l2index); + else + l1entry = pgtable_read(&sh_domain->l1, l1index); + spin_unlock(&sh_domain->map_lock); + switch (l2entry & 3) { + case 1: + return (l2entry & ~0xffff) | (iova & 0xffff); + case 2: + return (l2entry & ~0xfff) | (iova & 0xfff); + default: + if ((l1entry & 3) == 2) + return (l1entry & ~0xfffff) | (iova & 0xfffff); + return 0; + } +} + +static int find_dev_name(struct shmobile_ipmmu *ipmmu, const char *dev_name) +{ + unsigned int i, n = ipmmu->num_dev_names; + + for (i = 0; i < n; i++) { + if (strcmp(ipmmu->dev_names[i], dev_name) == 0) + return 1; + } + return 0; +} + +static int shmobile_iommu_add_device(struct device *dev) +{ + struct shmobile_iommu_archdata *archdata = ipmmu_archdata; + struct dma_iommu_mapping *mapping; + + if (!find_dev_name(archdata->ipmmu, dev_name(dev))) + return 0; + mapping = archdata->iommu_mapping; + if (!mapping) { + mapping = arm_iommu_create_mapping(&platform_bus_type, 0, + L1_LEN << 20); + if (IS_ERR(mapping)) + return PTR_ERR(mapping); + archdata->iommu_mapping = mapping; + } + dev->archdata.iommu = archdata; + if (arm_iommu_attach_device(dev, mapping)) + pr_err("arm_iommu_attach_device failed\n"); + return 0; +} + +static struct iommu_ops shmobile_iommu_ops = { + .domain_init = shmobile_iommu_domain_init, + .domain_destroy = shmobile_iommu_domain_destroy, + .attach_dev = shmobile_iommu_attach_device, + .detach_dev = shmobile_iommu_detach_device, + .map = shmobile_iommu_map, + .unmap = shmobile_iommu_unmap, + .iova_to_phys = shmobile_iommu_iova_to_phys, + .add_device = shmobile_iommu_add_device, + .pgsize_bitmap = SZ_1M | SZ_64K | SZ_4K, +}; + +int ipmmu_iommu_init(struct shmobile_ipmmu *ipmmu) +{ + static struct shmobile_iommu_archdata *archdata; + + l1cache = kmem_cache_create("shmobile-iommu-pgtable1", L1_SIZE, + L1_ALIGN, SLAB_HWCACHE_ALIGN, NULL); + if (!l1cache) + return -ENOMEM; + l2cache = kmem_cache_create("shmobile-iommu-pgtable2", L2_SIZE, + L2_ALIGN, SLAB_HWCACHE_ALIGN, NULL); + if (!l2cache) { + kmem_cache_destroy(l1cache); + return -ENOMEM; + } + archdata = kzalloc(sizeof(*archdata), GFP_KERNEL); + if (!archdata) { + kmem_cache_destroy(l1cache); + kmem_cache_destroy(l2cache); + return -ENOMEM; + } + spin_lock_init(&archdata->attach_lock); + archdata->ipmmu = ipmmu; + ipmmu_archdata = archdata; + bus_set_iommu(&platform_bus_type, &shmobile_iommu_ops); + return 0; +} diff --git a/drivers/iommu/shmobile-ipmmu.c b/drivers/iommu/shmobile-ipmmu.c new file mode 100644 index 00000000000..bd97adecb1f --- /dev/null +++ b/drivers/iommu/shmobile-ipmmu.c @@ -0,0 +1,130 @@ +/* + * IPMMU/IPMMUI + * Copyright (C) 2012 Hideki EIRAKU + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + */ + +#include <linux/err.h> +#include <linux/export.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/platform_data/sh_ipmmu.h> +#include "shmobile-ipmmu.h" + +#define IMCTR1 0x000 +#define IMCTR2 0x004 +#define IMASID 0x010 +#define IMTTBR 0x014 +#define IMTTBCR 0x018 + +#define IMCTR1_TLBEN (1 << 0) +#define IMCTR1_FLUSH (1 << 1) + +static void ipmmu_reg_write(struct shmobile_ipmmu *ipmmu, unsigned long reg_off, + unsigned long data) +{ + iowrite32(data, ipmmu->ipmmu_base + reg_off); +} + +void ipmmu_tlb_flush(struct shmobile_ipmmu *ipmmu) +{ + if (!ipmmu) + return; + + spin_lock(&ipmmu->flush_lock); + if (ipmmu->tlb_enabled) + ipmmu_reg_write(ipmmu, IMCTR1, IMCTR1_FLUSH | IMCTR1_TLBEN); + else + ipmmu_reg_write(ipmmu, IMCTR1, IMCTR1_FLUSH); + spin_unlock(&ipmmu->flush_lock); +} + +void ipmmu_tlb_set(struct shmobile_ipmmu *ipmmu, unsigned long phys, int size, + int asid) +{ + if (!ipmmu) + return; + + spin_lock(&ipmmu->flush_lock); + switch (size) { + default: + ipmmu->tlb_enabled = 0; + break; + case 0x2000: + ipmmu_reg_write(ipmmu, IMTTBCR, 1); + ipmmu->tlb_enabled = 1; + break; + case 0x1000: + ipmmu_reg_write(ipmmu, IMTTBCR, 2); + ipmmu->tlb_enabled = 1; + break; + case 0x800: + ipmmu_reg_write(ipmmu, IMTTBCR, 3); + ipmmu->tlb_enabled = 1; + break; + case 0x400: + ipmmu_reg_write(ipmmu, IMTTBCR, 4); + ipmmu->tlb_enabled = 1; + break; + case 0x200: + ipmmu_reg_write(ipmmu, IMTTBCR, 5); + ipmmu->tlb_enabled = 1; + break; + case 0x100: + ipmmu_reg_write(ipmmu, IMTTBCR, 6); + ipmmu->tlb_enabled = 1; + break; + case 0x80: + ipmmu_reg_write(ipmmu, IMTTBCR, 7); + ipmmu->tlb_enabled = 1; + break; + } + ipmmu_reg_write(ipmmu, IMTTBR, phys); + ipmmu_reg_write(ipmmu, IMASID, asid); + spin_unlock(&ipmmu->flush_lock); +} + +static int ipmmu_probe(struct platform_device *pdev) +{ + struct shmobile_ipmmu *ipmmu; + struct resource *res; + struct shmobile_ipmmu_platform_data *pdata = pdev->dev.platform_data; + + ipmmu = devm_kzalloc(&pdev->dev, sizeof(*ipmmu), GFP_KERNEL); + if (!ipmmu) { + dev_err(&pdev->dev, "cannot allocate device data\n"); + return -ENOMEM; + } + spin_lock_init(&ipmmu->flush_lock); + ipmmu->dev = &pdev->dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ipmmu->ipmmu_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ipmmu->ipmmu_base)) + return PTR_ERR(ipmmu->ipmmu_base); + + ipmmu->dev_names = pdata->dev_names; + ipmmu->num_dev_names = pdata->num_dev_names; + platform_set_drvdata(pdev, ipmmu); + ipmmu_reg_write(ipmmu, IMCTR1, 0x0); /* disable TLB */ + ipmmu_reg_write(ipmmu, IMCTR2, 0x0); /* disable PMB */ + return ipmmu_iommu_init(ipmmu); +} + +static struct platform_driver ipmmu_driver = { + .probe = ipmmu_probe, + .driver = { + .owner = THIS_MODULE, + .name = "ipmmu", + }, +}; + +static int __init ipmmu_init(void) +{ + return platform_driver_register(&ipmmu_driver); +} +subsys_initcall(ipmmu_init); diff --git a/drivers/iommu/shmobile-ipmmu.h b/drivers/iommu/shmobile-ipmmu.h new file mode 100644 index 00000000000..9524743ca1f --- /dev/null +++ b/drivers/iommu/shmobile-ipmmu.h @@ -0,0 +1,34 @@ +/* shmobile-ipmmu.h + * + * Copyright (C) 2012 Hideki EIRAKU + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + */ + +#ifndef __SHMOBILE_IPMMU_H__ +#define __SHMOBILE_IPMMU_H__ + +struct shmobile_ipmmu { + struct device *dev; + void __iomem *ipmmu_base; + int tlb_enabled; + spinlock_t flush_lock; + const char * const *dev_names; + unsigned int num_dev_names; +}; + +#ifdef CONFIG_SHMOBILE_IPMMU_TLB +void ipmmu_tlb_flush(struct shmobile_ipmmu *ipmmu); +void ipmmu_tlb_set(struct shmobile_ipmmu *ipmmu, unsigned long phys, int size, + int asid); +int ipmmu_iommu_init(struct shmobile_ipmmu *ipmmu); +#else +static inline int ipmmu_iommu_init(struct shmobile_ipmmu *ipmmu) +{ + return -EINVAL; +} +#endif + +#endif /* __SHMOBILE_IPMMU_H__ */ diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c index 8219f1d596e..dba1a9fd507 100644 --- a/drivers/iommu/tegra-gart.c +++ b/drivers/iommu/tegra-gart.c @@ -252,7 +252,7 @@ static int gart_iommu_map(struct iommu_domain *domain, unsigned long iova, spin_lock_irqsave(&gart->pte_lock, flags); pfn = __phys_to_pfn(pa); if (!pfn_valid(pfn)) { - dev_err(gart->dev, "Invalid page: %08x\n", pa); + dev_err(gart->dev, "Invalid page: %pa\n", &pa); spin_unlock_irqrestore(&gart->pte_lock, flags); return -EINVAL; } @@ -279,7 +279,7 @@ static size_t gart_iommu_unmap(struct iommu_domain *domain, unsigned long iova, } static phys_addr_t gart_iommu_iova_to_phys(struct iommu_domain *domain, - unsigned long iova) + dma_addr_t iova) { struct gart_device *gart = domain->priv; unsigned long pte; @@ -295,7 +295,8 @@ static phys_addr_t gart_iommu_iova_to_phys(struct iommu_domain *domain, pa = (pte & GART_PAGE_MASK); if (!pfn_valid(__phys_to_pfn(pa))) { - dev_err(gart->dev, "No entry for %08lx:%08x\n", iova, pa); + dev_err(gart->dev, "No entry for %08llx:%pa\n", + (unsigned long long)iova, &pa); gart_dump_table(gart); return -EINVAL; } @@ -350,7 +351,6 @@ static int tegra_gart_probe(struct platform_device *pdev) struct gart_device *gart; struct resource *res, *res_remap; void __iomem *gart_regs; - int err; struct device *dev = &pdev->dev; if (gart_handle) @@ -375,8 +375,7 @@ static int tegra_gart_probe(struct platform_device *pdev) gart_regs = devm_ioremap(dev, res->start, resource_size(res)); if (!gart_regs) { dev_err(dev, "failed to remap GART registers\n"); - err = -ENXIO; - goto fail; + return -ENXIO; } gart->dev = &pdev->dev; @@ -390,8 +389,7 @@ static int tegra_gart_probe(struct platform_device *pdev) gart->savedata = vmalloc(sizeof(u32) * gart->page_count); if (!gart->savedata) { dev_err(dev, "failed to allocate context save area\n"); - err = -ENOMEM; - goto fail; + return -ENOMEM; } platform_set_drvdata(pdev, gart); @@ -400,43 +398,29 @@ static int tegra_gart_probe(struct platform_device *pdev) gart_handle = gart; bus_set_iommu(&platform_bus_type, &gart_iommu_ops); return 0; - -fail: - if (gart_regs) - devm_iounmap(dev, gart_regs); - if (gart && gart->savedata) - vfree(gart->savedata); - devm_kfree(dev, gart); - return err; } static int tegra_gart_remove(struct platform_device *pdev) { struct gart_device *gart = platform_get_drvdata(pdev); - struct device *dev = gart->dev; writel(0, gart->regs + GART_CONFIG); if (gart->savedata) vfree(gart->savedata); - if (gart->regs) - devm_iounmap(dev, gart->regs); - devm_kfree(dev, gart); gart_handle = NULL; return 0; } -const struct dev_pm_ops tegra_gart_pm_ops = { +static const struct dev_pm_ops tegra_gart_pm_ops = { .suspend = tegra_gart_suspend, .resume = tegra_gart_resume, }; -#ifdef CONFIG_OF static struct of_device_id tegra_gart_of_match[] = { { .compatible = "nvidia,tegra20-gart", }, { }, }; MODULE_DEVICE_TABLE(of, tegra_gart_of_match); -#endif static struct platform_driver tegra_gart_driver = { .probe = tegra_gart_probe, @@ -445,7 +429,7 @@ static struct platform_driver tegra_gart_driver = { .owner = THIS_MODULE, .name = "tegra-gart", .pm = &tegra_gart_pm_ops, - .of_match_table = of_match_ptr(tegra_gart_of_match), + .of_match_table = tegra_gart_of_match, }, }; diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index fc178893789..605b5b46a90 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -1,7 +1,7 @@ /* * IOMMU API for SMMU in Tegra30 * - * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved. + * Copyright (c) 2011-2013, NVIDIA CORPORATION. All rights reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, @@ -19,6 +19,7 @@ #define pr_fmt(fmt) "%s(): " fmt, __func__ +#include <linux/err.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/spinlock.h> @@ -293,7 +294,11 @@ struct smmu_debugfs_info { * Per SMMU device - IOMMU device */ struct smmu_device { - void __iomem *regs[NUM_SMMU_REG_BANKS]; + void __iomem *regbase; /* register offset base */ + void __iomem **regs; /* register block start address array */ + void __iomem **rege; /* register block end address array */ + int nregs; /* number of register blocks */ + unsigned long iovmm_base; /* remappable base address */ unsigned long page_count; /* total remappable size */ spinlock_t lock; @@ -323,38 +328,37 @@ static struct smmu_device *smmu_handle; /* unique for a system */ /* * SMMU register accessors */ +static bool inline smmu_valid_reg(struct smmu_device *smmu, + void __iomem *addr) +{ + int i; + + for (i = 0; i < smmu->nregs; i++) { + if (addr < smmu->regs[i]) + break; + if (addr <= smmu->rege[i]) + return true; + } + + return false; +} + static inline u32 smmu_read(struct smmu_device *smmu, size_t offs) { - BUG_ON(offs < 0x10); - if (offs < 0x3c) - return readl(smmu->regs[0] + offs - 0x10); - BUG_ON(offs < 0x1f0); - if (offs < 0x200) - return readl(smmu->regs[1] + offs - 0x1f0); - BUG_ON(offs < 0x228); - if (offs < 0x284) - return readl(smmu->regs[2] + offs - 0x228); - BUG(); + void __iomem *addr = smmu->regbase + offs; + + BUG_ON(!smmu_valid_reg(smmu, addr)); + + return readl(addr); } static inline void smmu_write(struct smmu_device *smmu, u32 val, size_t offs) { - BUG_ON(offs < 0x10); - if (offs < 0x3c) { - writel(val, smmu->regs[0] + offs - 0x10); - return; - } - BUG_ON(offs < 0x1f0); - if (offs < 0x200) { - writel(val, smmu->regs[1] + offs - 0x1f0); - return; - } - BUG_ON(offs < 0x228); - if (offs < 0x284) { - writel(val, smmu->regs[2] + offs - 0x228); - return; - } - BUG(); + void __iomem *addr = smmu->regbase + offs; + + BUG_ON(!smmu_valid_reg(smmu, addr)); + + writel(val, addr); } #define VA_PAGE_TO_PA(va, page) \ @@ -727,7 +731,7 @@ static int smmu_iommu_map(struct iommu_domain *domain, unsigned long iova, unsigned long pfn = __phys_to_pfn(pa); unsigned long flags; - dev_dbg(as->smmu->dev, "[%d] %08lx:%08x\n", as->asid, iova, pa); + dev_dbg(as->smmu->dev, "[%d] %08lx:%pa\n", as->asid, iova, &pa); if (!pfn_valid(pfn)) return -ENOMEM; @@ -753,7 +757,7 @@ static size_t smmu_iommu_unmap(struct iommu_domain *domain, unsigned long iova, } static phys_addr_t smmu_iommu_iova_to_phys(struct iommu_domain *domain, - unsigned long iova) + dma_addr_t iova) { struct smmu_as *as = domain->priv; unsigned long *pte; @@ -768,7 +772,8 @@ static phys_addr_t smmu_iommu_iova_to_phys(struct iommu_domain *domain, pfn = *pte & SMMU_PFN_MASK; WARN_ON(!pfn_valid(pfn)); dev_dbg(as->smmu->dev, - "iova:%08lx pfn:%08lx asid:%d\n", iova, pfn, as->asid); + "iova:%08llx pfn:%08lx asid:%d\n", (unsigned long long)iova, + pfn, as->asid); spin_unlock_irqrestore(&as->lock, flags); return PFN_PHYS(pfn); @@ -964,7 +969,6 @@ static ssize_t smmu_debugfs_stats_write(struct file *file, { struct smmu_debugfs_info *info; struct smmu_device *smmu; - struct dentry *dent; int i; enum { _OFF = 0, @@ -992,8 +996,7 @@ static ssize_t smmu_debugfs_stats_write(struct file *file, if (i == ARRAY_SIZE(command)) return -EINVAL; - dent = file->f_dentry; - info = dent->d_inode->i_private; + info = file_inode(file)->i_private; smmu = info->smmu; offs = SMMU_CACHE_CONFIG(info->cache); @@ -1028,15 +1031,11 @@ static ssize_t smmu_debugfs_stats_write(struct file *file, static int smmu_debugfs_stats_show(struct seq_file *s, void *v) { - struct smmu_debugfs_info *info; - struct smmu_device *smmu; - struct dentry *dent; + struct smmu_debugfs_info *info = s->private; + struct smmu_device *smmu = info->smmu; int i; const char * const stats[] = { "hit", "miss", }; - dent = d_find_alias(s->private); - info = dent->d_inode->i_private; - smmu = info->smmu; for (i = 0; i < ARRAY_SIZE(stats); i++) { u32 val; @@ -1050,14 +1049,12 @@ static int smmu_debugfs_stats_show(struct seq_file *s, void *v) stats[i], val, offs); } seq_printf(s, "\n"); - dput(dent); - return 0; } static int smmu_debugfs_stats_open(struct inode *inode, struct file *file) { - return single_open(file, smmu_debugfs_stats_show, inode); + return single_open(file, smmu_debugfs_stats_show, inode->i_private); } static const struct file_operations smmu_debugfs_stats_fops = { @@ -1170,16 +1167,23 @@ static int tegra_smmu_probe(struct platform_device *pdev) return -ENOMEM; } - for (i = 0; i < ARRAY_SIZE(smmu->regs); i++) { + smmu->nregs = pdev->num_resources; + smmu->regs = devm_kzalloc(dev, 2 * smmu->nregs * sizeof(*smmu->regs), + GFP_KERNEL); + smmu->rege = smmu->regs + smmu->nregs; + if (!smmu->regs) + return -ENOMEM; + for (i = 0; i < smmu->nregs; i++) { struct resource *res; res = platform_get_resource(pdev, IORESOURCE_MEM, i); - if (!res) - return -ENODEV; - smmu->regs[i] = devm_request_and_ioremap(&pdev->dev, res); - if (!smmu->regs[i]) - return -EBUSY; + smmu->regs[i] = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(smmu->regs[i])) + return PTR_ERR(smmu->regs[i]); + smmu->rege[i] = smmu->regs[i] + resource_size(res) - 1; } + /* Same as "mc" 1st regiter block start address */ + smmu->regbase = (void __iomem *)((u32)smmu->regs[0] & PAGE_MASK); err = of_get_dma_window(dev->of_node, NULL, 0, NULL, &base, &size); if (err) @@ -1216,6 +1220,7 @@ static int tegra_smmu_probe(struct platform_device *pdev) as->pte_attr = _PTE_ATTR; spin_lock_init(&as->lock); + spin_lock_init(&as->client_lock); INIT_LIST_HEAD(&as->client); } spin_lock_init(&smmu->lock); @@ -1249,18 +1254,16 @@ static int tegra_smmu_remove(struct platform_device *pdev) return 0; } -const struct dev_pm_ops tegra_smmu_pm_ops = { +static const struct dev_pm_ops tegra_smmu_pm_ops = { .suspend = tegra_smmu_suspend, .resume = tegra_smmu_resume, }; -#ifdef CONFIG_OF static struct of_device_id tegra_smmu_of_match[] = { { .compatible = "nvidia,tegra30-smmu", }, { }, }; MODULE_DEVICE_TABLE(of, tegra_smmu_of_match); -#endif static struct platform_driver tegra_smmu_driver = { .probe = tegra_smmu_probe, @@ -1269,7 +1272,7 @@ static struct platform_driver tegra_smmu_driver = { .owner = THIS_MODULE, .name = "tegra-smmu", .pm = &tegra_smmu_pm_ops, - .of_match_table = of_match_ptr(tegra_smmu_of_match), + .of_match_table = tegra_smmu_of_match, }, }; |