diff options
Diffstat (limited to 'arch/powerpc/platforms/powernv/pci-ioda.c')
| -rw-r--r-- | arch/powerpc/platforms/powernv/pci-ioda.c | 1436 |
1 files changed, 1436 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c new file mode 100644 index 00000000000..de19edeaa7a --- /dev/null +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -0,0 +1,1436 @@ +/* + * Support PCI/PCIe on PowerNV platforms + * + * Copyright 2011 Benjamin Herrenschmidt, IBM Corp. + * + * 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; either version + * 2 of the License, or (at your option) any later version. + */ + +#undef DEBUG + +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/crash_dump.h> +#include <linux/debugfs.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/bootmem.h> +#include <linux/irq.h> +#include <linux/io.h> +#include <linux/msi.h> +#include <linux/memblock.h> + +#include <asm/sections.h> +#include <asm/io.h> +#include <asm/prom.h> +#include <asm/pci-bridge.h> +#include <asm/machdep.h> +#include <asm/msi_bitmap.h> +#include <asm/ppc-pci.h> +#include <asm/opal.h> +#include <asm/iommu.h> +#include <asm/tce.h> +#include <asm/xics.h> +#include <asm/debug.h> + +#include "powernv.h" +#include "pci.h" + +#define define_pe_printk_level(func, kern_level) \ +static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \ +{ \ + struct va_format vaf; \ + va_list args; \ + char pfix[32]; \ + int r; \ + \ + va_start(args, fmt); \ + \ + vaf.fmt = fmt; \ + vaf.va = &args; \ + \ + if (pe->pdev) \ + strlcpy(pfix, dev_name(&pe->pdev->dev), \ + sizeof(pfix)); \ + else \ + sprintf(pfix, "%04x:%02x ", \ + pci_domain_nr(pe->pbus), \ + pe->pbus->number); \ + r = printk(kern_level "pci %s: [PE# %.3d] %pV", \ + pfix, pe->pe_number, &vaf); \ + \ + va_end(args); \ + \ + return r; \ +} \ + +define_pe_printk_level(pe_err, KERN_ERR); +define_pe_printk_level(pe_warn, KERN_WARNING); +define_pe_printk_level(pe_info, KERN_INFO); + +/* + * stdcix is only supposed to be used in hypervisor real mode as per + * the architecture spec + */ +static inline void __raw_rm_writeq(u64 val, volatile void __iomem *paddr) +{ + __asm__ __volatile__("stdcix %0,0,%1" + : : "r" (val), "r" (paddr) : "memory"); +} + +static int pnv_ioda_alloc_pe(struct pnv_phb *phb) +{ + unsigned long pe; + + do { + pe = find_next_zero_bit(phb->ioda.pe_alloc, + phb->ioda.total_pe, 0); + if (pe >= phb->ioda.total_pe) + return IODA_INVALID_PE; + } while(test_and_set_bit(pe, phb->ioda.pe_alloc)); + + phb->ioda.pe_array[pe].phb = phb; + phb->ioda.pe_array[pe].pe_number = pe; + return pe; +} + +static void pnv_ioda_free_pe(struct pnv_phb *phb, int pe) +{ + WARN_ON(phb->ioda.pe_array[pe].pdev); + + memset(&phb->ioda.pe_array[pe], 0, sizeof(struct pnv_ioda_pe)); + clear_bit(pe, phb->ioda.pe_alloc); +} + +/* Currently those 2 are only used when MSIs are enabled, this will change + * but in the meantime, we need to protect them to avoid warnings + */ +#ifdef CONFIG_PCI_MSI +static struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev) +{ + struct pci_controller *hose = pci_bus_to_host(dev->bus); + struct pnv_phb *phb = hose->private_data; + struct pci_dn *pdn = pci_get_pdn(dev); + + if (!pdn) + return NULL; + if (pdn->pe_number == IODA_INVALID_PE) + return NULL; + return &phb->ioda.pe_array[pdn->pe_number]; +} +#endif /* CONFIG_PCI_MSI */ + +static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe) +{ + struct pci_dev *parent; + uint8_t bcomp, dcomp, fcomp; + long rc, rid_end, rid; + + /* Bus validation ? */ + if (pe->pbus) { + int count; + + dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; + fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; + parent = pe->pbus->self; + if (pe->flags & PNV_IODA_PE_BUS_ALL) + count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; + else + count = 1; + + switch(count) { + case 1: bcomp = OpalPciBusAll; break; + case 2: bcomp = OpalPciBus7Bits; break; + case 4: bcomp = OpalPciBus6Bits; break; + case 8: bcomp = OpalPciBus5Bits; break; + case 16: bcomp = OpalPciBus4Bits; break; + case 32: bcomp = OpalPciBus3Bits; break; + default: + pr_err("%s: Number of subordinate busses %d" + " unsupported\n", + pci_name(pe->pbus->self), count); + /* Do an exact match only */ + bcomp = OpalPciBusAll; + } + rid_end = pe->rid + (count << 8); + } else { + parent = pe->pdev->bus->self; + bcomp = OpalPciBusAll; + dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER; + fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER; + rid_end = pe->rid + 1; + } + + /* + * Associate PE in PELT. We need add the PE into the + * corresponding PELT-V as well. Otherwise, the error + * originated from the PE might contribute to other + * PEs. + */ + rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid, + bcomp, dcomp, fcomp, OPAL_MAP_PE); + if (rc) { + pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc); + return -ENXIO; + } + + rc = opal_pci_set_peltv(phb->opal_id, pe->pe_number, + pe->pe_number, OPAL_ADD_PE_TO_DOMAIN); + if (rc) + pe_warn(pe, "OPAL error %d adding self to PELTV\n", rc); + opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number, + OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); + + /* Add to all parents PELT-V */ + while (parent) { + struct pci_dn *pdn = pci_get_pdn(parent); + if (pdn && pdn->pe_number != IODA_INVALID_PE) { + rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number, + pe->pe_number, OPAL_ADD_PE_TO_DOMAIN); + /* XXX What to do in case of error ? */ + } + parent = parent->bus->self; + } + /* Setup reverse map */ + for (rid = pe->rid; rid < rid_end; rid++) + phb->ioda.pe_rmap[rid] = pe->pe_number; + + /* Setup one MVTs on IODA1 */ + if (phb->type == PNV_PHB_IODA1) { + pe->mve_number = pe->pe_number; + rc = opal_pci_set_mve(phb->opal_id, pe->mve_number, + pe->pe_number); + if (rc) { + pe_err(pe, "OPAL error %ld setting up MVE %d\n", + rc, pe->mve_number); + pe->mve_number = -1; + } else { + rc = opal_pci_set_mve_enable(phb->opal_id, + pe->mve_number, OPAL_ENABLE_MVE); + if (rc) { + pe_err(pe, "OPAL error %ld enabling MVE %d\n", + rc, pe->mve_number); + pe->mve_number = -1; + } + } + } else if (phb->type == PNV_PHB_IODA2) + pe->mve_number = 0; + + return 0; +} + +static void pnv_ioda_link_pe_by_weight(struct pnv_phb *phb, + struct pnv_ioda_pe *pe) +{ + struct pnv_ioda_pe *lpe; + + list_for_each_entry(lpe, &phb->ioda.pe_dma_list, dma_link) { + if (lpe->dma_weight < pe->dma_weight) { + list_add_tail(&pe->dma_link, &lpe->dma_link); + return; + } + } + list_add_tail(&pe->dma_link, &phb->ioda.pe_dma_list); +} + +static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev) +{ + /* This is quite simplistic. The "base" weight of a device + * is 10. 0 means no DMA is to be accounted for it. + */ + + /* If it's a bridge, no DMA */ + if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL) + return 0; + + /* Reduce the weight of slow USB controllers */ + if (dev->class == PCI_CLASS_SERIAL_USB_UHCI || + dev->class == PCI_CLASS_SERIAL_USB_OHCI || + dev->class == PCI_CLASS_SERIAL_USB_EHCI) + return 3; + + /* Increase the weight of RAID (includes Obsidian) */ + if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID) + return 15; + + /* Default */ + return 10; +} + +#if 0 +static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev) +{ + struct pci_controller *hose = pci_bus_to_host(dev->bus); + struct pnv_phb *phb = hose->private_data; + struct pci_dn *pdn = pci_get_pdn(dev); + struct pnv_ioda_pe *pe; + int pe_num; + + if (!pdn) { + pr_err("%s: Device tree node not associated properly\n", + pci_name(dev)); + return NULL; + } + if (pdn->pe_number != IODA_INVALID_PE) + return NULL; + + /* PE#0 has been pre-set */ + if (dev->bus->number == 0) + pe_num = 0; + else + pe_num = pnv_ioda_alloc_pe(phb); + if (pe_num == IODA_INVALID_PE) { + pr_warning("%s: Not enough PE# available, disabling device\n", + pci_name(dev)); + return NULL; + } + + /* NOTE: We get only one ref to the pci_dev for the pdn, not for the + * pointer in the PE data structure, both should be destroyed at the + * same time. However, this needs to be looked at more closely again + * once we actually start removing things (Hotplug, SR-IOV, ...) + * + * At some point we want to remove the PDN completely anyways + */ + pe = &phb->ioda.pe_array[pe_num]; + pci_dev_get(dev); + pdn->pcidev = dev; + pdn->pe_number = pe_num; + pe->pdev = dev; + pe->pbus = NULL; + pe->tce32_seg = -1; + pe->mve_number = -1; + pe->rid = dev->bus->number << 8 | pdn->devfn; + + pe_info(pe, "Associated device to PE\n"); + + if (pnv_ioda_configure_pe(phb, pe)) { + /* XXX What do we do here ? */ + if (pe_num) + pnv_ioda_free_pe(phb, pe_num); + pdn->pe_number = IODA_INVALID_PE; + pe->pdev = NULL; + pci_dev_put(dev); + return NULL; + } + + /* Assign a DMA weight to the device */ + pe->dma_weight = pnv_ioda_dma_weight(dev); + if (pe->dma_weight != 0) { + phb->ioda.dma_weight += pe->dma_weight; + phb->ioda.dma_pe_count++; + } + + /* Link the PE */ + pnv_ioda_link_pe_by_weight(phb, pe); + + return pe; +} +#endif /* Useful for SRIOV case */ + +static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe) +{ + struct pci_dev *dev; + + list_for_each_entry(dev, &bus->devices, bus_list) { + struct pci_dn *pdn = pci_get_pdn(dev); + + if (pdn == NULL) { + pr_warn("%s: No device node associated with device !\n", + pci_name(dev)); + continue; + } + pdn->pcidev = dev; + pdn->pe_number = pe->pe_number; + pe->dma_weight += pnv_ioda_dma_weight(dev); + if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) + pnv_ioda_setup_same_PE(dev->subordinate, pe); + } +} + +/* + * There're 2 types of PCI bus sensitive PEs: One that is compromised of + * single PCI bus. Another one that contains the primary PCI bus and its + * subordinate PCI devices and buses. The second type of PE is normally + * orgiriated by PCIe-to-PCI bridge or PLX switch downstream ports. + */ +static void pnv_ioda_setup_bus_PE(struct pci_bus *bus, int all) +{ + struct pci_controller *hose = pci_bus_to_host(bus); + struct pnv_phb *phb = hose->private_data; + struct pnv_ioda_pe *pe; + int pe_num; + + pe_num = pnv_ioda_alloc_pe(phb); + if (pe_num == IODA_INVALID_PE) { + pr_warning("%s: Not enough PE# available for PCI bus %04x:%02x\n", + __func__, pci_domain_nr(bus), bus->number); + return; + } + + pe = &phb->ioda.pe_array[pe_num]; + pe->flags = (all ? PNV_IODA_PE_BUS_ALL : PNV_IODA_PE_BUS); + pe->pbus = bus; + pe->pdev = NULL; + pe->tce32_seg = -1; + pe->mve_number = -1; + pe->rid = bus->busn_res.start << 8; + pe->dma_weight = 0; + + if (all) + pe_info(pe, "Secondary bus %d..%d associated with PE#%d\n", + bus->busn_res.start, bus->busn_res.end, pe_num); + else + pe_info(pe, "Secondary bus %d associated with PE#%d\n", + bus->busn_res.start, pe_num); + + if (pnv_ioda_configure_pe(phb, pe)) { + /* XXX What do we do here ? */ + if (pe_num) + pnv_ioda_free_pe(phb, pe_num); + pe->pbus = NULL; + return; + } + + /* Associate it with all child devices */ + pnv_ioda_setup_same_PE(bus, pe); + + /* Put PE to the list */ + list_add_tail(&pe->list, &phb->ioda.pe_list); + + /* Account for one DMA PE if at least one DMA capable device exist + * below the bridge + */ + if (pe->dma_weight != 0) { + phb->ioda.dma_weight += pe->dma_weight; + phb->ioda.dma_pe_count++; + } + + /* Link the PE */ + pnv_ioda_link_pe_by_weight(phb, pe); +} + +static void pnv_ioda_setup_PEs(struct pci_bus *bus) +{ + struct pci_dev *dev; + + pnv_ioda_setup_bus_PE(bus, 0); + + list_for_each_entry(dev, &bus->devices, bus_list) { + if (dev->subordinate) { + if (pci_pcie_type(dev) == PCI_EXP_TYPE_PCI_BRIDGE) + pnv_ioda_setup_bus_PE(dev->subordinate, 1); + else + pnv_ioda_setup_PEs(dev->subordinate); + } + } +} + +/* + * Configure PEs so that the downstream PCI buses and devices + * could have their associated PE#. Unfortunately, we didn't + * figure out the way to identify the PLX bridge yet. So we + * simply put the PCI bus and the subordinate behind the root + * port to PE# here. The game rule here is expected to be changed + * as soon as we can detected PLX bridge correctly. + */ +static void pnv_pci_ioda_setup_PEs(void) +{ + struct pci_controller *hose, *tmp; + + list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { + pnv_ioda_setup_PEs(hose->bus); + } +} + +static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev) +{ + struct pci_dn *pdn = pci_get_pdn(pdev); + struct pnv_ioda_pe *pe; + + /* + * The function can be called while the PE# + * hasn't been assigned. Do nothing for the + * case. + */ + if (!pdn || pdn->pe_number == IODA_INVALID_PE) + return; + + pe = &phb->ioda.pe_array[pdn->pe_number]; + WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops); + set_iommu_table_base(&pdev->dev, &pe->tce32_table); +} + +static int pnv_pci_ioda_dma_set_mask(struct pnv_phb *phb, + struct pci_dev *pdev, u64 dma_mask) +{ + struct pci_dn *pdn = pci_get_pdn(pdev); + struct pnv_ioda_pe *pe; + uint64_t top; + bool bypass = false; + + if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) + return -ENODEV;; + + pe = &phb->ioda.pe_array[pdn->pe_number]; + if (pe->tce_bypass_enabled) { + top = pe->tce_bypass_base + memblock_end_of_DRAM() - 1; + bypass = (dma_mask >= top); + } + + if (bypass) { + dev_info(&pdev->dev, "Using 64-bit DMA iommu bypass\n"); + set_dma_ops(&pdev->dev, &dma_direct_ops); + set_dma_offset(&pdev->dev, pe->tce_bypass_base); + } else { + dev_info(&pdev->dev, "Using 32-bit DMA via iommu\n"); + set_dma_ops(&pdev->dev, &dma_iommu_ops); + set_iommu_table_base(&pdev->dev, &pe->tce32_table); + } + return 0; +} + +static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, struct pci_bus *bus) +{ + struct pci_dev *dev; + + list_for_each_entry(dev, &bus->devices, bus_list) { + set_iommu_table_base_and_group(&dev->dev, &pe->tce32_table); + if (dev->subordinate) + pnv_ioda_setup_bus_dma(pe, dev->subordinate); + } +} + +static void pnv_pci_ioda1_tce_invalidate(struct pnv_ioda_pe *pe, + struct iommu_table *tbl, + __be64 *startp, __be64 *endp, bool rm) +{ + __be64 __iomem *invalidate = rm ? + (__be64 __iomem *)pe->tce_inval_reg_phys : + (__be64 __iomem *)tbl->it_index; + unsigned long start, end, inc; + + start = __pa(startp); + end = __pa(endp); + + /* BML uses this case for p6/p7/galaxy2: Shift addr and put in node */ + if (tbl->it_busno) { + start <<= 12; + end <<= 12; + inc = 128 << 12; + start |= tbl->it_busno; + end |= tbl->it_busno; + } else if (tbl->it_type & TCE_PCI_SWINV_PAIR) { + /* p7ioc-style invalidation, 2 TCEs per write */ + start |= (1ull << 63); + end |= (1ull << 63); + inc = 16; + } else { + /* Default (older HW) */ + inc = 128; + } + + end |= inc - 1; /* round up end to be different than start */ + + mb(); /* Ensure above stores are visible */ + while (start <= end) { + if (rm) + __raw_rm_writeq(cpu_to_be64(start), invalidate); + else + __raw_writeq(cpu_to_be64(start), invalidate); + start += inc; + } + + /* + * The iommu layer will do another mb() for us on build() + * and we don't care on free() + */ +} + +static void pnv_pci_ioda2_tce_invalidate(struct pnv_ioda_pe *pe, + struct iommu_table *tbl, + __be64 *startp, __be64 *endp, bool rm) +{ + unsigned long start, end, inc; + __be64 __iomem *invalidate = rm ? + (__be64 __iomem *)pe->tce_inval_reg_phys : + (__be64 __iomem *)tbl->it_index; + + /* We'll invalidate DMA address in PE scope */ + start = 0x2ul << 60; + start |= (pe->pe_number & 0xFF); + end = start; + + /* Figure out the start, end and step */ + inc = tbl->it_offset + (((u64)startp - tbl->it_base) / sizeof(u64)); + start |= (inc << 12); + inc = tbl->it_offset + (((u64)endp - tbl->it_base) / sizeof(u64)); + end |= (inc << 12); + inc = (0x1ul << 12); + mb(); + + while (start <= end) { + if (rm) + __raw_rm_writeq(cpu_to_be64(start), invalidate); + else + __raw_writeq(cpu_to_be64(start), invalidate); + start += inc; + } +} + +void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl, + __be64 *startp, __be64 *endp, bool rm) +{ + struct pnv_ioda_pe *pe = container_of(tbl, struct pnv_ioda_pe, + tce32_table); + struct pnv_phb *phb = pe->phb; + + if (phb->type == PNV_PHB_IODA1) + pnv_pci_ioda1_tce_invalidate(pe, tbl, startp, endp, rm); + else + pnv_pci_ioda2_tce_invalidate(pe, tbl, startp, endp, rm); +} + +static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, + struct pnv_ioda_pe *pe, unsigned int base, + unsigned int segs) +{ + + struct page *tce_mem = NULL; + const __be64 *swinvp; + struct iommu_table *tbl; + unsigned int i; + int64_t rc; + void *addr; + + /* 256M DMA window, 4K TCE pages, 8 bytes TCE */ +#define TCE32_TABLE_SIZE ((0x10000000 / 0x1000) * 8) + + /* XXX FIXME: Handle 64-bit only DMA devices */ + /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */ + /* XXX FIXME: Allocate multi-level tables on PHB3 */ + + /* We shouldn't already have a 32-bit DMA associated */ + if (WARN_ON(pe->tce32_seg >= 0)) + return; + + /* Grab a 32-bit TCE table */ + pe->tce32_seg = base; + pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n", + (base << 28), ((base + segs) << 28) - 1); + + /* XXX Currently, we allocate one big contiguous table for the + * TCEs. We only really need one chunk per 256M of TCE space + * (ie per segment) but that's an optimization for later, it + * requires some added smarts with our get/put_tce implementation + */ + tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, + get_order(TCE32_TABLE_SIZE * segs)); + if (!tce_mem) { + pe_err(pe, " Failed to allocate a 32-bit TCE memory\n"); + goto fail; + } + addr = page_address(tce_mem); + memset(addr, 0, TCE32_TABLE_SIZE * segs); + + /* Configure HW */ + for (i = 0; i < segs; i++) { + rc = opal_pci_map_pe_dma_window(phb->opal_id, + pe->pe_number, + base + i, 1, + __pa(addr) + TCE32_TABLE_SIZE * i, + TCE32_TABLE_SIZE, 0x1000); + if (rc) { + pe_err(pe, " Failed to configure 32-bit TCE table," + " err %ld\n", rc); + goto fail; + } + } + + /* Setup linux iommu table */ + tbl = &pe->tce32_table; + pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs, + base << 28); + + /* OPAL variant of P7IOC SW invalidated TCEs */ + swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); + if (swinvp) { + /* We need a couple more fields -- an address and a data + * to or. Since the bus is only printed out on table free + * errors, and on the first pass the data will be a relative + * bus number, print that out instead. + */ + pe->tce_inval_reg_phys = be64_to_cpup(swinvp); + tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys, + 8); + tbl->it_type |= (TCE_PCI_SWINV_CREATE | + TCE_PCI_SWINV_FREE | + TCE_PCI_SWINV_PAIR); + } + iommu_init_table(tbl, phb->hose->node); + iommu_register_group(tbl, phb->hose->global_number, pe->pe_number); + + if (pe->pdev) + set_iommu_table_base_and_group(&pe->pdev->dev, tbl); + else + pnv_ioda_setup_bus_dma(pe, pe->pbus); + + return; + fail: + /* XXX Failure: Try to fallback to 64-bit only ? */ + if (pe->tce32_seg >= 0) + pe->tce32_seg = -1; + if (tce_mem) + __free_pages(tce_mem, get_order(TCE32_TABLE_SIZE * segs)); +} + +static void pnv_pci_ioda2_set_bypass(struct iommu_table *tbl, bool enable) +{ + struct pnv_ioda_pe *pe = container_of(tbl, struct pnv_ioda_pe, + tce32_table); + uint16_t window_id = (pe->pe_number << 1 ) + 1; + int64_t rc; + + pe_info(pe, "%sabling 64-bit DMA bypass\n", enable ? "En" : "Dis"); + if (enable) { + phys_addr_t top = memblock_end_of_DRAM(); + + top = roundup_pow_of_two(top); + rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, + pe->pe_number, + window_id, + pe->tce_bypass_base, + top); + } else { + rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, + pe->pe_number, + window_id, + pe->tce_bypass_base, + 0); + + /* + * We might want to reset the DMA ops of all devices on + * this PE. However in theory, that shouldn't be necessary + * as this is used for VFIO/KVM pass-through and the device + * hasn't yet been returned to its kernel driver + */ + } + if (rc) + pe_err(pe, "OPAL error %lld configuring bypass window\n", rc); + else + pe->tce_bypass_enabled = enable; +} + +static void pnv_pci_ioda2_setup_bypass_pe(struct pnv_phb *phb, + struct pnv_ioda_pe *pe) +{ + /* TVE #1 is selected by PCI address bit 59 */ + pe->tce_bypass_base = 1ull << 59; + + /* Install set_bypass callback for VFIO */ + pe->tce32_table.set_bypass = pnv_pci_ioda2_set_bypass; + + /* Enable bypass by default */ + pnv_pci_ioda2_set_bypass(&pe->tce32_table, true); +} + +static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, + struct pnv_ioda_pe *pe) +{ + struct page *tce_mem = NULL; + void *addr; + const __be64 *swinvp; + struct iommu_table *tbl; + unsigned int tce_table_size, end; + int64_t rc; + + /* We shouldn't already have a 32-bit DMA associated */ + if (WARN_ON(pe->tce32_seg >= 0)) + return; + + /* The PE will reserve all possible 32-bits space */ + pe->tce32_seg = 0; + end = (1 << ilog2(phb->ioda.m32_pci_base)); + tce_table_size = (end / 0x1000) * 8; + pe_info(pe, "Setting up 32-bit TCE table at 0..%08x\n", + end); + + /* Allocate TCE table */ + tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, + get_order(tce_table_size)); + if (!tce_mem) { + pe_err(pe, "Failed to allocate a 32-bit TCE memory\n"); + goto fail; + } + addr = page_address(tce_mem); + memset(addr, 0, tce_table_size); + + /* + * Map TCE table through TVT. The TVE index is the PE number + * shifted by 1 bit for 32-bits DMA space. + */ + rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number, + pe->pe_number << 1, 1, __pa(addr), + tce_table_size, 0x1000); + if (rc) { + pe_err(pe, "Failed to configure 32-bit TCE table," + " err %ld\n", rc); + goto fail; + } + + /* Setup linux iommu table */ + tbl = &pe->tce32_table; + pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, 0); + + /* OPAL variant of PHB3 invalidated TCEs */ + swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); + if (swinvp) { + /* We need a couple more fields -- an address and a data + * to or. Since the bus is only printed out on table free + * errors, and on the first pass the data will be a relative + * bus number, print that out instead. + */ + pe->tce_inval_reg_phys = be64_to_cpup(swinvp); + tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys, + 8); + tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE); + } + iommu_init_table(tbl, phb->hose->node); + iommu_register_group(tbl, phb->hose->global_number, pe->pe_number); + + if (pe->pdev) + set_iommu_table_base_and_group(&pe->pdev->dev, tbl); + else + pnv_ioda_setup_bus_dma(pe, pe->pbus); + + /* Also create a bypass window */ + pnv_pci_ioda2_setup_bypass_pe(phb, pe); + return; +fail: + if (pe->tce32_seg >= 0) + pe->tce32_seg = -1; + if (tce_mem) + __free_pages(tce_mem, get_order(tce_table_size)); +} + +static void pnv_ioda_setup_dma(struct pnv_phb *phb) +{ + struct pci_controller *hose = phb->hose; + unsigned int residual, remaining, segs, tw, base; + struct pnv_ioda_pe *pe; + + /* If we have more PE# than segments available, hand out one + * per PE until we run out and let the rest fail. If not, + * then we assign at least one segment per PE, plus more based + * on the amount of devices under that PE + */ + if (phb->ioda.dma_pe_count > phb->ioda.tce32_count) + residual = 0; + else + residual = phb->ioda.tce32_count - + phb->ioda.dma_pe_count; + + pr_info("PCI: Domain %04x has %ld available 32-bit DMA segments\n", + hose->global_number, phb->ioda.tce32_count); + pr_info("PCI: %d PE# for a total weight of %d\n", + phb->ioda.dma_pe_count, phb->ioda.dma_weight); + + /* Walk our PE list and configure their DMA segments, hand them + * out one base segment plus any residual segments based on + * weight + */ + remaining = phb->ioda.tce32_count; + tw = phb->ioda.dma_weight; + base = 0; + list_for_each_entry(pe, &phb->ioda.pe_dma_list, dma_link) { + if (!pe->dma_weight) + continue; + if (!remaining) { + pe_warn(pe, "No DMA32 resources available\n"); + continue; + } + segs = 1; + if (residual) { + segs += ((pe->dma_weight * residual) + (tw / 2)) / tw; + if (segs > remaining) + segs = remaining; + } + + /* + * For IODA2 compliant PHB3, we needn't care about the weight. + * The all available 32-bits DMA space will be assigned to + * the specific PE. + */ + if (phb->type == PNV_PHB_IODA1) { + pe_info(pe, "DMA weight %d, assigned %d DMA32 segments\n", + pe->dma_weight, segs); + pnv_pci_ioda_setup_dma_pe(phb, pe, base, segs); + } else { + pe_info(pe, "Assign DMA32 space\n"); + segs = 0; + pnv_pci_ioda2_setup_dma_pe(phb, pe); + } + + remaining -= segs; + base += segs; + } +} + +#ifdef CONFIG_PCI_MSI +static void pnv_ioda2_msi_eoi(struct irq_data *d) +{ + unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d); + struct irq_chip *chip = irq_data_get_irq_chip(d); + struct pnv_phb *phb = container_of(chip, struct pnv_phb, + ioda.irq_chip); + int64_t rc; + + rc = opal_pci_msi_eoi(phb->opal_id, hw_irq); + WARN_ON_ONCE(rc); + + icp_native_eoi(d); +} + +static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev, + unsigned int hwirq, unsigned int virq, + unsigned int is_64, struct msi_msg *msg) +{ + struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev); + struct pci_dn *pdn = pci_get_pdn(dev); + struct irq_data *idata; + struct irq_chip *ichip; + unsigned int xive_num = hwirq - phb->msi_base; + __be32 data; + int rc; + + /* No PE assigned ? bail out ... no MSI for you ! */ + if (pe == NULL) + return -ENXIO; + + /* Check if we have an MVE */ + if (pe->mve_number < 0) + return -ENXIO; + + /* Force 32-bit MSI on some broken devices */ + if (pdn && pdn->force_32bit_msi) + is_64 = 0; + + /* Assign XIVE to PE */ + rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num); + if (rc) { + pr_warn("%s: OPAL error %d setting XIVE %d PE\n", + pci_name(dev), rc, xive_num); + return -EIO; + } + + if (is_64) { + __be64 addr64; + + rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1, + &addr64, &data); + if (rc) { + pr_warn("%s: OPAL error %d getting 64-bit MSI data\n", + pci_name(dev), rc); + return -EIO; + } + msg->address_hi = be64_to_cpu(addr64) >> 32; + msg->address_lo = be64_to_cpu(addr64) & 0xfffffffful; + } else { + __be32 addr32; + + rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1, + &addr32, &data); + if (rc) { + pr_warn("%s: OPAL error %d getting 32-bit MSI data\n", + pci_name(dev), rc); + return -EIO; + } + msg->address_hi = 0; + msg->address_lo = be32_to_cpu(addr32); + } + msg->data = be32_to_cpu(data); + + /* + * Change the IRQ chip for the MSI interrupts on PHB3. + * The corresponding IRQ chip should be populated for + * the first time. + */ + if (phb->type == PNV_PHB_IODA2) { + if (!phb->ioda.irq_chip_init) { + idata = irq_get_irq_data(virq); + ichip = irq_data_get_irq_chip(idata); + phb->ioda.irq_chip_init = 1; + phb->ioda.irq_chip = *ichip; + phb->ioda.irq_chip.irq_eoi = pnv_ioda2_msi_eoi; + } + + irq_set_chip(virq, &phb->ioda.irq_chip); + } + + pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d)," + " address=%x_%08x data=%x PE# %d\n", + pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num, + msg->address_hi, msg->address_lo, data, pe->pe_number); + + return 0; +} + +static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) +{ + unsigned int count; + const __be32 *prop = of_get_property(phb->hose->dn, + "ibm,opal-msi-ranges", NULL); + if (!prop) { + /* BML Fallback */ + prop = of_get_property(phb->hose->dn, "msi-ranges", NULL); + } + if (!prop) + return; + + phb->msi_base = be32_to_cpup(prop); + count = be32_to_cpup(prop + 1); + if (msi_bitmap_alloc(&phb->msi_bmp, count, phb->hose->dn)) { + pr_err("PCI %d: Failed to allocate MSI bitmap !\n", + phb->hose->global_number); + return; + } + + phb->msi_setup = pnv_pci_ioda_msi_setup; + phb->msi32_support = 1; + pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n", + count, phb->msi_base); +} +#else +static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { } +#endif /* CONFIG_PCI_MSI */ + +/* + * This function is supposed to be called on basis of PE from top + * to bottom style. So the the I/O or MMIO segment assigned to + * parent PE could be overrided by its child PEs if necessary. + */ +static void pnv_ioda_setup_pe_seg(struct pci_controller *hose, + struct pnv_ioda_pe *pe) +{ + struct pnv_phb *phb = hose->private_data; + struct pci_bus_region region; + struct resource *res; + int i, index; + int rc; + + /* + * NOTE: We only care PCI bus based PE for now. For PCI + * device based PE, for example SRIOV sensitive VF should + * be figured out later. + */ + BUG_ON(!(pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))); + + pci_bus_for_each_resource(pe->pbus, res, i) { + if (!res || !res->flags || + res->start > res->end) + continue; + + if (res->flags & IORESOURCE_IO) { + region.start = res->start - phb->ioda.io_pci_base; + region.end = res->end - phb->ioda.io_pci_base; + index = region.start / phb->ioda.io_segsize; + + while (index < phb->ioda.total_pe && + region.start <= region.end) { + phb->ioda.io_segmap[index] = pe->pe_number; + rc = opal_pci_map_pe_mmio_window(phb->opal_id, + pe->pe_number, OPAL_IO_WINDOW_TYPE, 0, index); + if (rc != OPAL_SUCCESS) { + pr_err("%s: OPAL error %d when mapping IO " + "segment #%d to PE#%d\n", + __func__, rc, index, pe->pe_number); + break; + } + + region.start += phb->ioda.io_segsize; + index++; + } + } else if (res->flags & IORESOURCE_MEM) { + /* WARNING: Assumes M32 is mem region 0 in PHB. We need to + * harden that algorithm when we start supporting M64 + */ + region.start = res->start - + hose->mem_offset[0] - + phb->ioda.m32_pci_base; + region.end = res->end - + hose->mem_offset[0] - + phb->ioda.m32_pci_base; + index = region.start / phb->ioda.m32_segsize; + + while (index < phb->ioda.total_pe && + region.start <= region.end) { + phb->ioda.m32_segmap[index] = pe->pe_number; + rc = opal_pci_map_pe_mmio_window(phb->opal_id, + pe->pe_number, OPAL_M32_WINDOW_TYPE, 0, index); + if (rc != OPAL_SUCCESS) { + pr_err("%s: OPAL error %d when mapping M32 " + "segment#%d to PE#%d", + __func__, rc, index, pe->pe_number); + break; + } + + region.start += phb->ioda.m32_segsize; + index++; + } + } + } +} + +static void pnv_pci_ioda_setup_seg(void) +{ + struct pci_controller *tmp, *hose; + struct pnv_phb *phb; + struct pnv_ioda_pe *pe; + + list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { + phb = hose->private_data; + list_for_each_entry(pe, &phb->ioda.pe_list, list) { + pnv_ioda_setup_pe_seg(hose, pe); + } + } +} + +static void pnv_pci_ioda_setup_DMA(void) +{ + struct pci_controller *hose, *tmp; + struct pnv_phb *phb; + + list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { + pnv_ioda_setup_dma(hose->private_data); + + /* Mark the PHB initialization done */ + phb = hose->private_data; + phb->initialized = 1; + } +} + +static void pnv_pci_ioda_create_dbgfs(void) +{ +#ifdef CONFIG_DEBUG_FS + struct pci_controller *hose, *tmp; + struct pnv_phb *phb; + char name[16]; + + list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { + phb = hose->private_data; + + sprintf(name, "PCI%04x", hose->global_number); + phb->dbgfs = debugfs_create_dir(name, powerpc_debugfs_root); + if (!phb->dbgfs) + pr_warning("%s: Error on creating debugfs on PHB#%x\n", + __func__, hose->global_number); + } +#endif /* CONFIG_DEBUG_FS */ +} + +static void pnv_pci_ioda_fixup(void) +{ + pnv_pci_ioda_setup_PEs(); + pnv_pci_ioda_setup_seg(); + pnv_pci_ioda_setup_DMA(); + + pnv_pci_ioda_create_dbgfs(); + +#ifdef CONFIG_EEH + eeh_probe_mode_set(EEH_PROBE_MODE_DEV); + eeh_addr_cache_build(); + eeh_init(); +#endif +} + +/* + * Returns the alignment for I/O or memory windows for P2P + * bridges. That actually depends on how PEs are segmented. + * For now, we return I/O or M32 segment size for PE sensitive + * P2P bridges. Otherwise, the default values (4KiB for I/O, + * 1MiB for memory) will be returned. + * + * The current PCI bus might be put into one PE, which was + * create against the parent PCI bridge. For that case, we + * needn't enlarge the alignment so that we can save some + * resources. + */ +static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus, + unsigned long type) +{ + struct pci_dev *bridge; + struct pci_controller *hose = pci_bus_to_host(bus); + struct pnv_phb *phb = hose->private_data; + int num_pci_bridges = 0; + + bridge = bus->self; + while (bridge) { + if (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) { + num_pci_bridges++; + if (num_pci_bridges >= 2) + return 1; + } + + bridge = bridge->bus->self; + } + + /* We need support prefetchable memory window later */ + if (type & IORESOURCE_MEM) + return phb->ioda.m32_segsize; + + return phb->ioda.io_segsize; +} + +/* Prevent enabling devices for which we couldn't properly + * assign a PE + */ +static int pnv_pci_enable_device_hook(struct pci_dev *dev) +{ + struct pci_controller *hose = pci_bus_to_host(dev->bus); + struct pnv_phb *phb = hose->private_data; + struct pci_dn *pdn; + + /* The function is probably called while the PEs have + * not be created yet. For example, resource reassignment + * during PCI probe period. We just skip the check if + * PEs isn't ready. + */ + if (!phb->initialized) + return 0; + + pdn = pci_get_pdn(dev); + if (!pdn || pdn->pe_number == IODA_INVALID_PE) + return -EINVAL; + + return 0; +} + +static u32 pnv_ioda_bdfn_to_pe(struct pnv_phb *phb, struct pci_bus *bus, + u32 devfn) +{ + return phb->ioda.pe_rmap[(bus->number << 8) | devfn]; +} + +static void pnv_pci_ioda_shutdown(struct pnv_phb *phb) +{ + opal_pci_reset(phb->opal_id, OPAL_PCI_IODA_TABLE_RESET, + OPAL_ASSERT_RESET); +} + +void __init pnv_pci_init_ioda_phb(struct device_node *np, + u64 hub_id, int ioda_type) +{ + struct pci_controller *hose; + struct pnv_phb *phb; + unsigned long size, m32map_off, pemap_off, iomap_off = 0; + const __be64 *prop64; + const __be32 *prop32; + int len; + u64 phb_id; + void *aux; + long rc; + + pr_info("Initializing IODA%d OPAL PHB %s\n", ioda_type, np->full_name); + + prop64 = of_get_property(np, "ibm,opal-phbid", NULL); + if (!prop64) { + pr_err(" Missing \"ibm,opal-phbid\" property !\n"); + return; + } + phb_id = be64_to_cpup(prop64); + pr_debug(" PHB-ID : 0x%016llx\n", phb_id); + + phb = alloc_bootmem(sizeof(struct pnv_phb)); + if (!phb) { + pr_err(" Out of memory !\n"); + return; + } + + /* Allocate PCI controller */ + memset(phb, 0, sizeof(struct pnv_phb)); + phb->hose = hose = pcibios_alloc_controller(np); + if (!phb->hose) { + pr_err(" Can't allocate PCI controller for %s\n", + np->full_name); + free_bootmem((unsigned long)phb, sizeof(struct pnv_phb)); + return; + } + + spin_lock_init(&phb->lock); + prop32 = of_get_property(np, "bus-range", &len); + if (prop32 && len == 8) { + hose->first_busno = be32_to_cpu(prop32[0]); + hose->last_busno = be32_to_cpu(prop32[1]); + } else { + pr_warn(" Broken <bus-range> on %s\n", np->full_name); + hose->first_busno = 0; + hose->last_busno = 0xff; + } + hose->private_data = phb; + phb->hub_id = hub_id; + phb->opal_id = phb_id; + phb->type = ioda_type; + + /* Detect specific models for error handling */ + if (of_device_is_compatible(np, "ibm,p7ioc-pciex")) + phb->model = PNV_PHB_MODEL_P7IOC; + else if (of_device_is_compatible(np, "ibm,power8-pciex")) + phb->model = PNV_PHB_MODEL_PHB3; + else + phb->model = PNV_PHB_MODEL_UNKNOWN; + + /* Parse 32-bit and IO ranges (if any) */ + pci_process_bridge_OF_ranges(hose, np, !hose->global_number); + + /* Get registers */ + phb->regs = of_iomap(np, 0); + if (phb->regs == NULL) + pr_err(" Failed to map registers !\n"); + + /* Initialize more IODA stuff */ + phb->ioda.total_pe = 1; + prop32 = of_get_property(np, "ibm,opal-num-pes", NULL); + if (prop32) + phb->ioda.total_pe = be32_to_cpup(prop32); + prop32 = of_get_property(np, "ibm,opal-reserved-pe", NULL); + if (prop32) + phb->ioda.reserved_pe = be32_to_cpup(prop32); + phb->ioda.m32_size = resource_size(&hose->mem_resources[0]); + /* FW Has already off top 64k of M32 space (MSI space) */ + phb->ioda.m32_size += 0x10000; + + phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe; + phb->ioda.m32_pci_base = hose->mem_resources[0].start - hose->mem_offset[0]; + phb->ioda.io_size = hose->pci_io_size; + phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe; + phb->ioda.io_pci_base = 0; /* XXX calculate this ? */ + + /* Allocate aux data & arrays. We don't have IO ports on PHB3 */ + size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long)); + m32map_off = size; + size += phb->ioda.total_pe * sizeof(phb->ioda.m32_segmap[0]); + if (phb->type == PNV_PHB_IODA1) { + iomap_off = size; + size += phb->ioda.total_pe * sizeof(phb->ioda.io_segmap[0]); + } + pemap_off = size; + size += phb->ioda.total_pe * sizeof(struct pnv_ioda_pe); + aux = alloc_bootmem(size); + memset(aux, 0, size); + phb->ioda.pe_alloc = aux; + phb->ioda.m32_segmap = aux + m32map_off; + if (phb->type == PNV_PHB_IODA1) + phb->ioda.io_segmap = aux + iomap_off; + phb->ioda.pe_array = aux + pemap_off; + set_bit(phb->ioda.reserved_pe, phb->ioda.pe_alloc); + + INIT_LIST_HEAD(&phb->ioda.pe_dma_list); + INIT_LIST_HEAD(&phb->ioda.pe_list); + + /* Calculate how many 32-bit TCE segments we have */ + phb->ioda.tce32_count = phb->ioda.m32_pci_base >> 28; + + /* Clear unusable m64 */ + hose->mem_resources[1].flags = 0; + hose->mem_resources[1].start = 0; + hose->mem_resources[1].end = 0; + hose->mem_resources[2].flags = 0; + hose->mem_resources[2].start = 0; + hose->mem_resources[2].end = 0; + +#if 0 /* We should really do that ... */ + rc = opal_pci_set_phb_mem_window(opal->phb_id, + window_type, + window_num, + starting_real_address, + starting_pci_address, + segment_size); +#endif + + pr_info(" %d (%d) PE's M32: 0x%x [segment=0x%x]" + " IO: 0x%x [segment=0x%x]\n", + phb->ioda.total_pe, + phb->ioda.reserved_pe, + phb->ioda.m32_size, phb->ioda.m32_segsize, + phb->ioda.io_size, phb->ioda.io_segsize); + + phb->hose->ops = &pnv_pci_ops; +#ifdef CONFIG_EEH + phb->eeh_ops = &ioda_eeh_ops; +#endif + + /* Setup RID -> PE mapping function */ + phb->bdfn_to_pe = pnv_ioda_bdfn_to_pe; + + /* Setup TCEs */ + phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup; + phb->dma_set_mask = pnv_pci_ioda_dma_set_mask; + + /* Setup shutdown function for kexec */ + phb->shutdown = pnv_pci_ioda_shutdown; + + /* Setup MSI support */ + pnv_pci_init_ioda_msis(phb); + + /* + * We pass the PCI probe flag PCI_REASSIGN_ALL_RSRC here + * to let the PCI core do resource assignment. It's supposed + * that the PCI core will do correct I/O and MMIO alignment + * for the P2P bridge bars so that each PCI bus (excluding + * the child P2P bridges) can form individual PE. + */ + ppc_md.pcibios_fixup = pnv_pci_ioda_fixup; + ppc_md.pcibios_enable_device_hook = pnv_pci_enable_device_hook; + ppc_md.pcibios_window_alignment = pnv_pci_window_alignment; + ppc_md.pcibios_reset_secondary_bus = pnv_pci_reset_secondary_bus; + pci_add_flags(PCI_REASSIGN_ALL_RSRC); + + /* Reset IODA tables to a clean state */ + rc = opal_pci_reset(phb_id, OPAL_PCI_IODA_TABLE_RESET, OPAL_ASSERT_RESET); + if (rc) + pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc); + + /* If we're running in kdump kerenl, the previous kerenl never + * shutdown PCI devices correctly. We already got IODA table + * cleaned out. So we have to issue PHB reset to stop all PCI + * transactions from previous kerenl. + */ + if (is_kdump_kernel()) { + pr_info(" Issue PHB reset ...\n"); + ioda_eeh_phb_reset(hose, EEH_RESET_FUNDAMENTAL); + ioda_eeh_phb_reset(hose, OPAL_DEASSERT_RESET); + } +} + +void __init pnv_pci_init_ioda2_phb(struct device_node *np) +{ + pnv_pci_init_ioda_phb(np, 0, PNV_PHB_IODA2); +} + +void __init pnv_pci_init_ioda_hub(struct device_node *np) +{ + struct device_node *phbn; + const __be64 *prop64; + u64 hub_id; + + pr_info("Probing IODA IO-Hub %s\n", np->full_name); + + prop64 = of_get_property(np, "ibm,opal-hubid", NULL); + if (!prop64) { + pr_err(" Missing \"ibm,opal-hubid\" property !\n"); + return; + } + hub_id = be64_to_cpup(prop64); + pr_devel(" HUB-ID : 0x%016llx\n", hub_id); + + /* Count child PHBs */ + for_each_child_of_node(np, phbn) { + /* Look for IODA1 PHBs */ + if (of_device_is_compatible(phbn, "ibm,ioda-phb")) + pnv_pci_init_ioda_phb(phbn, hub_id, PNV_PHB_IODA1); + } +} |