diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/iommu/Makefile | 1 | ||||
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 91 | ||||
| -rw-r--r-- | drivers/iommu/amd_iommu_v2.c | 2 | ||||
| -rw-r--r-- | drivers/iommu/exynos-iommu.c | 4 | ||||
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 93 | ||||
| -rw-r--r-- | drivers/iommu/iommu.c | 611 | ||||
| -rw-r--r-- | drivers/iommu/msm_iommu.c | 5 | ||||
| -rw-r--r-- | drivers/iommu/of_iommu.c | 90 | ||||
| -rw-r--r-- | drivers/iommu/omap-iommu.c | 4 | ||||
| -rw-r--r-- | drivers/iommu/tegra-gart.c | 5 | ||||
| -rw-r--r-- | drivers/iommu/tegra-smmu.c | 285 |
12 files changed, 974 insertions, 223 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index 34089372753..9f69b561f5d 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -13,6 +13,10 @@ menuconfig IOMMU_SUPPORT if IOMMU_SUPPORT +config OF_IOMMU + def_bool y + depends on OF + # MSM IOMMU support config MSM_IOMMU bool "MSM IOMMU Support" @@ -154,7 +158,7 @@ config TEGRA_IOMMU_GART config TEGRA_IOMMU_SMMU bool "Tegra SMMU IOMMU Support" - depends on ARCH_TEGRA_3x_SOC + depends on ARCH_TEGRA_3x_SOC && TEGRA_AHB select IOMMU_API help Enables support for remapping discontiguous physical memory diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile index 76e54ef796d..14a4d5fc94f 100644 --- a/drivers/iommu/Makefile +++ b/drivers/iommu/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_IOMMU_API) += iommu.o +obj-$(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 diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 584ea85ab2f..6d1cbdfc9b2 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -256,11 +256,21 @@ 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; +} + +#define REQ_ACS_FLAGS (PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF) + static int iommu_init_device(struct device *dev) { - struct pci_dev *pdev = to_pci_dev(dev); + struct pci_dev *dma_pdev, *pdev = to_pci_dev(dev); struct iommu_dev_data *dev_data; + struct iommu_group *group; u16 alias; + int ret; if (dev->archdata.iommu) return 0; @@ -281,8 +291,43 @@ static int iommu_init_device(struct device *dev) return -ENOTSUPP; } dev_data->alias_data = alias_data; + + dma_pdev = pci_get_bus_and_slot(alias >> 8, alias & 0xff); + } else + dma_pdev = pci_dev_get(pdev); + + swap_pci_ref(&dma_pdev, pci_get_dma_source(dma_pdev)); + + 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))); + + while (!pci_is_root_bus(dma_pdev->bus)) { + if (pci_acs_path_enabled(dma_pdev->bus->self, + NULL, REQ_ACS_FLAGS)) + break; + + swap_pci_ref(&dma_pdev, pci_dev_get(dma_pdev->bus->self)); + } + + group = iommu_group_get(&dma_pdev->dev); + pci_dev_put(dma_pdev); + if (!group) { + group = iommu_group_alloc(); + if (IS_ERR(group)) + return PTR_ERR(group); } + ret = iommu_group_add_device(group, dev); + + iommu_group_put(group); + + if (ret) + return ret; + if (pci_iommuv2_capable(pdev)) { struct amd_iommu *iommu; @@ -311,6 +356,8 @@ static void iommu_ignore_device(struct device *dev) static void iommu_uninit_device(struct device *dev) { + iommu_group_remove_device(dev); + /* * Nothing to do here - we keep dev_data around for unplugged devices * and reuse it when the device is re-plugged - not doing so would @@ -2253,6 +2300,18 @@ static int device_change_notifier(struct notifier_block *nb, iommu_init_device(dev); + /* + * dev_data is still NULL and + * got initialized in iommu_init_device + */ + dev_data = get_dev_data(dev); + + if (iommu_pass_through || dev_data->iommu_v2) { + dev_data->passthrough = true; + attach_device(dev, pt_domain); + break; + } + domain = domain_for_device(dev); /* allocate a protection domain if a device is added */ @@ -2270,10 +2329,7 @@ static int device_change_notifier(struct notifier_block *nb, dev_data = get_dev_data(dev); - if (!dev_data->passthrough) - dev->archdata.dma_ops = &amd_iommu_dma_ops; - else - dev->archdata.dma_ops = &nommu_dma_ops; + dev->archdata.dma_ops = &amd_iommu_dma_ops; break; case BUS_NOTIFY_DEL_DEVICE: @@ -3082,6 +3138,10 @@ static int amd_iommu_domain_init(struct iommu_domain *dom) dom->priv = domain; + dom->geometry.aperture_start = 0; + dom->geometry.aperture_end = ~0ULL; + dom->geometry.force_aperture = true; + return 0; out_free: @@ -3240,26 +3300,6 @@ static int amd_iommu_domain_has_cap(struct iommu_domain *domain, return 0; } -static int amd_iommu_device_group(struct device *dev, unsigned int *groupid) -{ - struct iommu_dev_data *dev_data = dev->archdata.iommu; - struct pci_dev *pdev = to_pci_dev(dev); - u16 devid; - - if (!dev_data) - return -ENODEV; - - if (pdev->is_virtfn || !iommu_group_mf) - devid = dev_data->devid; - else - devid = calc_devid(pdev->bus->number, - PCI_DEVFN(PCI_SLOT(pdev->devfn), 0)); - - *groupid = amd_iommu_alias_table[devid]; - - return 0; -} - static struct iommu_ops amd_iommu_ops = { .domain_init = amd_iommu_domain_init, .domain_destroy = amd_iommu_domain_destroy, @@ -3269,7 +3309,6 @@ static struct iommu_ops amd_iommu_ops = { .unmap = amd_iommu_unmap, .iova_to_phys = amd_iommu_iova_to_phys, .domain_has_cap = amd_iommu_domain_has_cap, - .device_group = amd_iommu_device_group, .pgsize_bitmap = AMD_IOMMU_PGSIZES, }; diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c index 77c28b72174..0d50f9afd37 100644 --- a/drivers/iommu/amd_iommu_v2.c +++ b/drivers/iommu/amd_iommu_v2.c @@ -681,6 +681,8 @@ int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid, atomic_set(&pasid_state->count, 1); init_waitqueue_head(&pasid_state->wq); + spin_lock_init(&pasid_state->lock); + pasid_state->task = task; pasid_state->mm = get_task_mm(task); pasid_state->device_state = dev_state; diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 9a114b9ff17..5c40937e998 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -732,6 +732,10 @@ static int exynos_iommu_domain_init(struct iommu_domain *domain) spin_lock_init(&priv->pgtablelock); INIT_LIST_HEAD(&priv->clients); + dom->geometry.aperture_start = 0; + dom->geometry.aperture_end = ~0UL; + dom->geometry.force_aperture = true; + domain->priv = priv; return 0; diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index b12af2ff8c5..d4b018e5159 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3932,6 +3932,10 @@ static int intel_iommu_domain_init(struct iommu_domain *domain) domain_update_iommu_cap(dmar_domain); domain->priv = dmar_domain; + domain->geometry.aperture_start = 0; + domain->geometry.aperture_end = __DOMAIN_MAX_ADDR(dmar_domain->gaw); + domain->geometry.force_aperture = true; + return 0; } @@ -4090,52 +4094,70 @@ static int intel_iommu_domain_has_cap(struct iommu_domain *domain, return 0; } -/* - * Group numbers are arbitrary. Device with the same group number - * indicate the iommu cannot differentiate between them. To avoid - * tracking used groups we just use the seg|bus|devfn of the lowest - * level we're able to differentiate devices - */ -static int intel_iommu_device_group(struct device *dev, unsigned int *groupid) +static void swap_pci_ref(struct pci_dev **from, struct pci_dev *to) { - struct pci_dev *pdev = to_pci_dev(dev); - struct pci_dev *bridge; - union { - struct { - u8 devfn; - u8 bus; - u16 segment; - } pci; - u32 group; - } id; + pci_dev_put(*from); + *from = to; +} - if (iommu_no_mapping(dev)) - return -ENODEV; +#define REQ_ACS_FLAGS (PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF) - id.pci.segment = pci_domain_nr(pdev->bus); - id.pci.bus = pdev->bus->number; - id.pci.devfn = pdev->devfn; +static int intel_iommu_add_device(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct pci_dev *bridge, *dma_pdev; + struct iommu_group *group; + int ret; - if (!device_to_iommu(id.pci.segment, id.pci.bus, id.pci.devfn)) + if (!device_to_iommu(pci_domain_nr(pdev->bus), + pdev->bus->number, pdev->devfn)) return -ENODEV; bridge = pci_find_upstream_pcie_bridge(pdev); if (bridge) { - if (pci_is_pcie(bridge)) { - id.pci.bus = bridge->subordinate->number; - id.pci.devfn = 0; - } else { - id.pci.bus = bridge->bus->number; - id.pci.devfn = bridge->devfn; - } + if (pci_is_pcie(bridge)) + dma_pdev = pci_get_domain_bus_and_slot( + pci_domain_nr(pdev->bus), + bridge->subordinate->number, 0); + else + dma_pdev = pci_dev_get(bridge); + } else + dma_pdev = pci_dev_get(pdev); + + swap_pci_ref(&dma_pdev, pci_get_dma_source(dma_pdev)); + + 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))); + + while (!pci_is_root_bus(dma_pdev->bus)) { + if (pci_acs_path_enabled(dma_pdev->bus->self, + NULL, REQ_ACS_FLAGS)) + break; + + swap_pci_ref(&dma_pdev, pci_dev_get(dma_pdev->bus->self)); + } + + group = iommu_group_get(&dma_pdev->dev); + pci_dev_put(dma_pdev); + if (!group) { + group = iommu_group_alloc(); + if (IS_ERR(group)) + return PTR_ERR(group); } - if (!pdev->is_virtfn && iommu_group_mf) - id.pci.devfn = PCI_DEVFN(PCI_SLOT(id.pci.devfn), 0); + ret = iommu_group_add_device(group, dev); - *groupid = id.group; + iommu_group_put(group); + return ret; +} - return 0; +static void intel_iommu_remove_device(struct device *dev) +{ + iommu_group_remove_device(dev); } static struct iommu_ops intel_iommu_ops = { @@ -4147,7 +4169,8 @@ static struct iommu_ops intel_iommu_ops = { .unmap = intel_iommu_unmap, .iova_to_phys = intel_iommu_iova_to_phys, .domain_has_cap = intel_iommu_domain_has_cap, - .device_group = intel_iommu_device_group, + .add_device = intel_iommu_add_device, + .remove_device = intel_iommu_remove_device, .pgsize_bitmap = INTEL_IOMMU_PGSIZES, }; diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 8b9ded88e6f..ddbdacad776 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -26,60 +26,535 @@ #include <linux/slab.h> #include <linux/errno.h> #include <linux/iommu.h> +#include <linux/idr.h> +#include <linux/notifier.h> +#include <linux/err.h> + +static struct kset *iommu_group_kset; +static struct ida iommu_group_ida; +static struct mutex iommu_group_mutex; + +struct iommu_group { + struct kobject kobj; + struct kobject *devices_kobj; + struct list_head devices; + struct mutex mutex; + struct blocking_notifier_head notifier; + void *iommu_data; + void (*iommu_data_release)(void *iommu_data); + char *name; + int id; +}; + +struct iommu_device { + struct list_head list; + struct device *dev; + char *name; +}; + +struct iommu_group_attribute { + struct attribute attr; + ssize_t (*show)(struct iommu_group *group, char *buf); + ssize_t (*store)(struct iommu_group *group, + const char *buf, size_t count); +}; + +#define IOMMU_GROUP_ATTR(_name, _mode, _show, _store) \ +struct iommu_group_attribute iommu_group_attr_##_name = \ + __ATTR(_name, _mode, _show, _store) + +#define to_iommu_group_attr(_attr) \ + container_of(_attr, struct iommu_group_attribute, attr) +#define to_iommu_group(_kobj) \ + container_of(_kobj, struct iommu_group, kobj) -static ssize_t show_iommu_group(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t iommu_group_attr_show(struct kobject *kobj, + struct attribute *__attr, char *buf) { - unsigned int groupid; + struct iommu_group_attribute *attr = to_iommu_group_attr(__attr); + struct iommu_group *group = to_iommu_group(kobj); + ssize_t ret = -EIO; - if (iommu_device_group(dev, &groupid)) - return 0; + if (attr->show) + ret = attr->show(group, buf); + return ret; +} + +static ssize_t iommu_group_attr_store(struct kobject *kobj, + struct attribute *__attr, + const char *buf, size_t count) +{ + struct iommu_group_attribute *attr = to_iommu_group_attr(__attr); + struct iommu_group *group = to_iommu_group(kobj); + ssize_t ret = -EIO; + + if (attr->store) + ret = attr->store(group, buf, count); + return ret; +} + +static const struct sysfs_ops iommu_group_sysfs_ops = { + .show = iommu_group_attr_show, + .store = iommu_group_attr_store, +}; - return sprintf(buf, "%u", groupid); +static int iommu_group_create_file(struct iommu_group *group, + struct iommu_group_attribute *attr) +{ + return sysfs_create_file(&group->kobj, &attr->attr); } -static DEVICE_ATTR(iommu_group, S_IRUGO, show_iommu_group, NULL); -static int add_iommu_group(struct device *dev, void *data) +static void iommu_group_remove_file(struct iommu_group *group, + struct iommu_group_attribute *attr) +{ + sysfs_remove_file(&group->kobj, &attr->attr); +} + +static ssize_t iommu_group_show_name(struct iommu_group *group, char *buf) +{ + return sprintf(buf, "%s\n", group->name); +} + +static IOMMU_GROUP_ATTR(name, S_IRUGO, iommu_group_show_name, NULL); + +static void iommu_group_release(struct kobject *kobj) +{ + struct iommu_group *group = to_iommu_group(kobj); + + if (group->iommu_data_release) + group->iommu_data_release(group->iommu_data); + + mutex_lock(&iommu_group_mutex); + ida_remove(&iommu_group_ida, group->id); + mutex_unlock(&iommu_group_mutex); + + kfree(group->name); + kfree(group); +} + +static struct kobj_type iommu_group_ktype = { + .sysfs_ops = &iommu_group_sysfs_ops, + .release = iommu_group_release, +}; + +/** + * iommu_group_alloc - Allocate a new group + * @name: Optional name to associate with group, visible in sysfs + * + * This function is called by an iommu driver to allocate a new iommu + * group. The iommu group represents the minimum granularity of the iommu. + * Upon successful return, the caller holds a reference to the supplied + * group in order to hold the group until devices are added. Use + * iommu_group_put() to release this extra reference count, allowing the + * group to be automatically reclaimed once it has no devices or external + * references. + */ +struct iommu_group *iommu_group_alloc(void) +{ + struct iommu_group *group; + int ret; + + group = kzalloc(sizeof(*group), GFP_KERNEL); + if (!group) + return ERR_PTR(-ENOMEM); + + group->kobj.kset = iommu_group_kset; + mutex_init(&group->mutex); + INIT_LIST_HEAD(&group->devices); + BLOCKING_INIT_NOTIFIER_HEAD(&group->notifier); + + mutex_lock(&iommu_group_mutex); + +again: + if (unlikely(0 == ida_pre_get(&iommu_group_ida, GFP_KERNEL))) { + kfree(group); + mutex_unlock(&iommu_group_mutex); + return ERR_PTR(-ENOMEM); + } + + if (-EAGAIN == ida_get_new(&iommu_group_ida, &group->id)) + goto again; + + mutex_unlock(&iommu_group_mutex); + + ret = kobject_init_and_add(&group->kobj, &iommu_group_ktype, + NULL, "%d", group->id); + if (ret) { + mutex_lock(&iommu_group_mutex); + ida_remove(&iommu_group_ida, group->id); + mutex_unlock(&iommu_group_mutex); + kfree(group); + return ERR_PTR(ret); + } + + group->devices_kobj = kobject_create_and_add("devices", &group->kobj); + if (!group->devices_kobj) { + kobject_put(&group->kobj); /* triggers .release & free */ + return ERR_PTR(-ENOMEM); + } + + /* + * The devices_kobj holds a reference on the group kobject, so + * as long as that exists so will the group. We can therefore + * use the devices_kobj for reference counting. + */ + kobject_put(&group->kobj); + + return group; +} +EXPORT_SYMBOL_GPL(iommu_group_alloc); + +/** + * iommu_group_get_iommudata - retrieve iommu_data registered for a group + * @group: the group + * + * iommu drivers can store data in the group for use when doing iommu + * operations. This function provides a way to retrieve it. Caller + * should hold a group reference. + */ +void *iommu_group_get_iommudata(struct iommu_group *group) +{ + return group->iommu_data; +} +EXPORT_SYMBOL_GPL(iommu_group_get_iommudata); + +/** + * iommu_group_set_iommudata - set iommu_data for a group + * @group: the group + * @iommu_data: new data + * @release: release function for iommu_data + * + * iommu drivers can store data in the group for use when doing iommu + * operations. This function provides a way to set the data after + * the group has been allocated. Caller should hold a group reference. + */ +void iommu_group_set_iommudata(struct iommu_group *group, void *iommu_data, + void (*release)(void *iommu_data)) { - unsigned int groupid; + group->iommu_data = iommu_data; + group->iommu_data_release = release; +} +EXPORT_SYMBOL_GPL(iommu_group_set_iommudata); - if (iommu_device_group(dev, &groupid) == 0) - return device_create_file(dev, &dev_attr_iommu_group); +/** + * iommu_group_set_name - set name for a group + * @group: the group + * @name: name + * + * Allow iommu driver to set a name for a group. When set it will + * appear in a name attribute file under the group in sysfs. + */ +int iommu_group_set_name(struct iommu_group *group, const char *name) +{ + int ret; + + if (group->name) { + iommu_group_remove_file(group, &iommu_group_attr_name); + kfree(group->name); + group->name = NULL; + if (!name) + return 0; + } + + group->name = kstrdup(name, GFP_KERNEL); + if (!group->name) + return -ENOMEM; + + ret = iommu_group_create_file(group, &iommu_group_attr_name); + if (ret) { + kfree(group->name); + group->name = NULL; + return ret; + } return 0; } +EXPORT_SYMBOL_GPL(iommu_group_set_name); + +/** + * iommu_group_add_device - add a device to an iommu group + * @group: the group into which to add the device (reference should be held) + * @dev: the device + * + * This function is called by an iommu driver to add a device into a + * group. Adding a device increments the group reference count. + */ +int iommu_group_add_device(struct iommu_group *group, struct device *dev) +{ + int ret, i = 0; + struct iommu_device *device; + + device = kzalloc(sizeof(*device), GFP_KERNEL); + if (!device) + return -ENOMEM; + + device->dev = dev; + + ret = sysfs_create_link(&dev->kobj, &group->kobj, "iommu_group"); + if (ret) { + kfree(device); + return ret; + } + + device->name = kasprintf(GFP_KERNEL, "%s", kobject_name(&dev->kobj)); +rename: + if (!device->name) { + sysfs_remove_link(&dev->kobj, "iommu_group"); + kfree(device); + return -ENOMEM; + } + + ret = sysfs_create_link_nowarn(group->devices_kobj, + &dev->kobj, device->name); + if (ret) { + kfree(device->name); + if (ret == -EEXIST && i >= 0) { + /* + * Account for the slim chance of collision + * and append an instance to the name. + */ + device->name = kasprintf(GFP_KERNEL, "%s.%d", + kobject_name(&dev->kobj), i++); + goto rename; + } + + sysfs_remove_link(&dev->kobj, "iommu_group"); + kfree(device); + return ret; + } + + kobject_get(group->devices_kobj); + + dev->iommu_group = group; + + mutex_lock(&group->mutex); + list_add_tail(&device->list, &group->devices); + mutex_unlock(&group->mutex); + + /* Notify any listeners about change to group. */ + blocking_notifier_call_chain(&group->notifier, + IOMMU_GROUP_NOTIFY_ADD_DEVICE, dev); + return 0; +} +EXPORT_SYMBOL_GPL(iommu_group_add_device); + +/** + * iommu_group_remove_device - remove a device from it's current group + * @dev: device to be removed + * + * This function is called by an iommu driver to remove the device from + * it's current group. This decrements the iommu group reference count. + */ +void iommu_group_remove_device(struct device *dev) +{ + struct iommu_group *group = dev->iommu_group; + struct iommu_device *tmp_device, *device = NULL; + + /* Pre-notify listeners that a device is being removed. */ + blocking_notifier_call_chain(&group->notifier, + IOMMU_GROUP_NOTIFY_DEL_DEVICE, dev); + + mutex_lock(&group->mutex); + list_for_each_entry(tmp_device, &group->devices, list) { + if (tmp_device->dev == dev) { + device = tmp_device; + list_del(&device->list); + break; + } + } + mutex_unlock(&group->mutex); + + if (!device) + return; + + sysfs_remove_link(group->devices_kobj, device->name); + sysfs_remove_link(&dev->kobj, "iommu_group"); + + kfree(device->name); + kfree(device); + dev->iommu_group = NULL; + kobject_put(group->devices_kobj); +} +EXPORT_SYMBOL_GPL(iommu_group_remove_device); + +/** + * iommu_group_for_each_dev - iterate over each device in the group + * @group: the group + * @data: caller opaque data to be passed to callback function + * @fn: caller supplied callback function + * + * This function is called by group users to iterate over group devices. + * Callers should hold a reference count to the group during callback. + * The group->mutex is held across callbacks, which will block calls to + * iommu_group_add/remove_device. + */ +int iommu_group_for_each_dev(struct iommu_group *group, void *data, + int (*fn)(struct device *, void *)) +{ + struct iommu_device *device; + int ret = 0; + + mutex_lock(&group->mutex); + list_for_each_entry(device, &group->devices, list) { + ret = fn(device->dev, data); + if (ret) + break; + } + mutex_unlock(&group->mutex); + return ret; +} +EXPORT_SYMBOL_GPL(iommu_group_for_each_dev); + +/** + * iommu_group_get - Return the group for a device and increment reference + * @dev: get the group that this device belongs to + * + * This function is called by iommu drivers and users to get the group + * for the specified device. If found, the group is returned and the group + * reference in incremented, else NULL. + */ +struct iommu_group *iommu_group_get(struct device *dev) +{ + struct iommu_group *group = dev->iommu_group; + + if (group) + kobject_get(group->devices_kobj); + + return group; +} +EXPORT_SYMBOL_GPL(iommu_group_get); + +/** + * iommu_group_put - Decrement group reference + * @group: the group to use + * + * This function is called by iommu drivers and users to release the + * iommu group. Once the reference count is zero, the group is released. + */ +void iommu_group_put(struct iommu_group *group) +{ + if (group) + kobject_put(group->devices_kobj); +} +EXPORT_SYMBOL_GPL(iommu_group_put); + +/** + * iommu_group_register_notifier - Register a notifier for group changes + * @group: the group to watch + * @nb: notifier block to signal + * + * This function allows iommu group users to track changes in a group. + * See include/linux/iommu.h for actions sent via this notifier. Caller + * should hold a reference to the group throughout notifier registration. + */ +int iommu_group_register_notifier(struct iommu_group *group, + struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&group->notifier, nb); +} +EXPORT_SYMBOL_GPL(iommu_group_register_notifier); + +/** + * iommu_group_unregister_notifier - Unregister a notifier + * @group: the group to watch + * @nb: notifier block to signal + * + * Unregister a previously registered group notifier block. + */ +int iommu_group_unregister_notifier(struct iommu_group *group, + struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&group->notifier, nb); +} +EXPORT_SYMBOL_GPL(iommu_group_unregister_notifier); + +/** + * iommu_group_id - Return ID for a group + * @group: the group to ID + * + * Return the unique ID for the group matching the sysfs group number. + */ +int iommu_group_id(struct iommu_group *group) +{ + return group->id; +} +EXPORT_SYMBOL_GPL(iommu_group_id); -static int remove_iommu_group(struct device *dev) +static int add_iommu_group(struct device *dev, void *data) { - unsigned int groupid; + struct iommu_ops *ops = data; + + if (!ops->add_device) + return -ENODEV; - if (iommu_device_group(dev, &groupid) == 0) - device_remove_file(dev, &dev_attr_iommu_group); + WARN_ON(dev->iommu_group); + + ops->add_device(dev); return 0; } -static int iommu_device_notifier(struct notifier_block *nb, - unsigned long action, void *data) +static int iommu_bus_notifier(struct notifier_block *nb, + unsigned long action, void *data) { struct device *dev = data; + struct iommu_ops *ops = dev->bus->iommu_ops; + struct iommu_group *group; + unsigned long group_action = 0; + + /* + * ADD/DEL call into iommu driver ops if provided, which may + * result in ADD/DEL notifiers to group->notifier + */ + if (action == BUS_NOTIFY_ADD_DEVICE) { + if (ops->add_device) + return ops->add_device(dev); + } else if (action == BUS_NOTIFY_DEL_DEVICE) { + if (ops->remove_device && dev->iommu_group) { + ops->remove_device(dev); + return 0; + } + } + + /* + * Remaining BUS_NOTIFYs get filtered and republished to the + * group, if anyone is listening + */ + group = iommu_group_get(dev); + if (!group) + return 0; + + switch (action) { + case BUS_NOTIFY_BIND_DRIVER: + group_action = IOMMU_GROUP_NOTIFY_BIND_DRIVER; + break; + case BUS_NOTIFY_BOUND_DRIVER: + group_action = IOMMU_GROUP_NOTIFY_BOUND_DRIVER; + break; + case BUS_NOTIFY_UNBIND_DRIVER: + group_action = IOMMU_GROUP_NOTIFY_UNBIND_DRIVER; + break; + case BUS_NOTIFY_UNBOUND_DRIVER: + group_action = IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER; + break; + } - if (action == BUS_NOTIFY_ADD_DEVICE) - return add_iommu_group(dev, NULL); - else if (action == BUS_NOTIFY_DEL_DEVICE) - return remove_iommu_group(dev); + if (group_action) + blocking_notifier_call_chain(&group->notifier, + group_action, dev); + iommu_group_put(group); return 0; } -static struct notifier_block iommu_device_nb = { - .notifier_call = iommu_device_notifier, +static struct notifier_block iommu_bus_nb = { + .notifier_call = iommu_bus_notifier, }; static void iommu_bus_init(struct bus_type *bus, struct iommu_ops *ops) { - bus_register_notifier(bus, &iommu_device_nb); - bus_for_each_dev(bus, NULL, NULL, add_iommu_group); + bus_register_notifier(bus, &iommu_bus_nb); + bus_for_each_dev(bus, NULL, ops, add_iommu_group); } /** @@ -192,6 +667,45 @@ void iommu_detach_device(struct iommu_domain *domain, struct device *dev) } EXPORT_SYMBOL_GPL(iommu_detach_device); +/* + * IOMMU groups are really the natrual working unit of the IOMMU, but + * the IOMMU API works on domains and devices. Bridge that gap by + * iterating over the devices in a group. Ideally we'd have a single + * device which represents the requestor ID of the group, but we also + * allow IOMMU drivers to create policy defined minimum sets, where + * the physical hardware may be able to distiguish members, but we + * wish to group them at a higher level (ex. untrusted multi-function + * PCI devices). Thus we attach each device. + */ +static int iommu_group_do_attach_device(struct device *dev, void *data) +{ + struct iommu_domain *domain = data; + + return iommu_attach_device(domain, dev); +} + +int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group) +{ + return iommu_group_for_each_dev(group, domain, + iommu_group_do_attach_device); +} +EXPORT_SYMBOL_GPL(iommu_attach_group); + +static int iommu_group_do_detach_device(struct device *dev, void *data) +{ + struct iommu_domain *domain = data; + + iommu_detach_device(domain, dev); + + return 0; +} + +void iommu_detach_group(struct iommu_domain *domain, struct iommu_group *group) +{ + iommu_group_for_each_dev(group, domain, iommu_group_do_detach_device); +} +EXPORT_SYMBOL_GPL(iommu_detach_group); + phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, unsigned long iova) { @@ -336,11 +850,48 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) } EXPORT_SYMBOL_GPL(iommu_unmap); -int iommu_device_group(struct device *dev, unsigned int *groupid) +static int __init iommu_init(void) { - if (iommu_present(dev->bus) && dev->bus->iommu_ops->device_group) - return dev->bus->iommu_ops->device_group(dev, groupid); + iommu_group_kset = kset_create_and_add("iommu_groups", + NULL, kernel_kobj); + ida_init(&iommu_group_ida); + mutex_init(&iommu_group_mutex); + + BUG_ON(!iommu_group_kset); + + return 0; +} +subsys_initcall(iommu_init); + +int iommu_domain_get_attr(struct iommu_domain *domain, + enum iommu_attr attr, void *data) +{ + struct iommu_domain_geometry *geometry; + int ret = 0; + + switch (attr) { + case DOMAIN_ATTR_GEOMETRY: + geometry = data; + *geometry = domain->geometry; + + break; + default: + if (!domain->ops->domain_get_attr) + return -EINVAL; + + ret = domain->ops->domain_get_attr(domain, attr, data); + } + + return ret; +} +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; - return -ENODEV; + return domain->ops->domain_set_attr(domain, attr, data); } -EXPORT_SYMBOL_GPL(iommu_device_group); +EXPORT_SYMBOL_GPL(iommu_domain_set_attr); diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c index cee307e8660..6a8870a3166 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c @@ -226,6 +226,11 @@ static int msm_iommu_domain_init(struct iommu_domain *domain) memset(priv->pgtable, 0, SZ_16K); domain->priv = priv; + + domain->geometry.aperture_start = 0; + domain->geometry.aperture_end = (1ULL << 32) - 1; + domain->geometry.force_aperture = true; + return 0; fail_nomem: diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c new file mode 100644 index 00000000000..ee249bc959f --- /dev/null +++ b/drivers/iommu/of_iommu.c @@ -0,0 +1,90 @@ +/* + * OF helpers for IOMMU + * + * Copyright (c) 2012, 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, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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 St - Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <linux/export.h> +#include <linux/limits.h> +#include <linux/of.h> + +/** + * of_get_dma_window - Parse *dma-window property and returns 0 if found. + * + * @dn: device node + * @prefix: prefix for property name if any + * @index: index to start to parse + * @busno: Returns busno if supported. Otherwise pass NULL + * @addr: Returns address that DMA starts + * @size: Returns the range that DMA can handle + * + * This supports different formats flexibly. "prefix" can be + * configured if any. "busno" and "index" are optionally + * specified. Set 0(or NULL) if not used. + */ +int of_get_dma_window(struct device_node *dn, const char *prefix, int index, + unsigned long *busno, dma_addr_t *addr, size_t *size) +{ + const __be32 *dma_window, *end; + int bytes, cur_index = 0; + char propname[NAME_MAX], addrname[NAME_MAX], sizename[NAME_MAX]; + + if (!dn || !addr || !size) + return -EINVAL; + + if (!prefix) + prefix = ""; + + snprintf(propname, sizeof(propname), "%sdma-window", prefix); + snprintf(addrname, sizeof(addrname), "%s#dma-address-cells", prefix); + snprintf(sizename, sizeof(sizename), "%s#dma-size-cells", prefix); + + dma_window = of_get_property(dn, propname, &bytes); + if (!dma_window) + return -ENODEV; + end = dma_window + bytes / sizeof(*dma_window); + + while (dma_window < end) { + u32 cells; + const void *prop; + + /* busno is one cell if supported */ + if (busno) + *busno = be32_to_cpup(dma_window++); + + prop = of_get_property(dn, addrname, NULL); + if (!prop) + prop = of_get_property(dn, "#address-cells", NULL); + + cells = prop ? be32_to_cpup(prop) : of_n_addr_cells(dn); + if (!cells) + return -EINVAL; + *addr = of_read_number(dma_window, cells); + dma_window += cells; + + prop = of_get_property(dn, sizename, NULL); + cells = prop ? be32_to_cpup(prop) : of_n_size_cells(dn); + if (!cells) + return -EINVAL; + *size = of_read_number(dma_window, cells); + dma_window += cells; + + if (cur_index++ == index) + break; + } + return 0; +} +EXPORT_SYMBOL_GPL(of_get_dma_window); diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index e70ee2b59df..d0b1234581b 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -1148,6 +1148,10 @@ static int omap_iommu_domain_init(struct iommu_domain *domain) domain->priv = omap_domain; + domain->geometry.aperture_start = 0; + domain->geometry.aperture_end = (1ULL << 32) - 1; + domain->geometry.force_aperture = true; + return 0; fail_nomem: diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c index 0c0a3779221..c16e8fc8a4b 100644 --- a/drivers/iommu/tegra-gart.c +++ b/drivers/iommu/tegra-gart.c @@ -165,6 +165,11 @@ static int gart_iommu_attach_dev(struct iommu_domain *domain, return -EINVAL; domain->priv = gart; + domain->geometry.aperture_start = gart->iovmm_base; + domain->geometry.aperture_end = gart->iovmm_base + + gart->page_count * GART_PAGE_SIZE - 1; + domain->geometry.force_aperture = true; + client = devm_kzalloc(gart->dev, sizeof(*c), GFP_KERNEL); if (!client) return -ENOMEM; diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 3f3d09d560e..4ba325ab626 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -30,12 +30,15 @@ #include <linux/sched.h> #include <linux/iommu.h> #include <linux/io.h> +#include <linux/of.h> +#include <linux/of_iommu.h> #include <asm/page.h> #include <asm/cacheflush.h> #include <mach/iomap.h> #include <mach/smmu.h> +#include <mach/tegra-ahb.h> /* bitmap of the page sizes currently supported */ #define SMMU_IOMMU_PGSIZES (SZ_4K) @@ -111,12 +114,6 @@ #define SMMU_PDE_NEXT_SHIFT 28 -/* AHB Arbiter Registers */ -#define AHB_XBAR_CTRL 0xe0 -#define AHB_XBAR_CTRL_SMMU_INIT_DONE_DONE 1 -#define AHB_XBAR_CTRL_SMMU_INIT_DONE_SHIFT 17 - -#define SMMU_NUM_ASIDS 4 #define SMMU_TLB_FLUSH_VA_SECTION__MASK 0xffc00000 #define SMMU_TLB_FLUSH_VA_SECTION__SHIFT 12 /* right shift */ #define SMMU_TLB_FLUSH_VA_GROUP__MASK 0xffffc000 @@ -136,6 +133,7 @@ #define SMMU_PAGE_SHIFT 12 #define SMMU_PAGE_SIZE (1 << SMMU_PAGE_SHIFT) +#define SMMU_PAGE_MASK ((1 << SMMU_PAGE_SHIFT) - 1) #define SMMU_PDIR_COUNT 1024 #define SMMU_PDIR_SIZE (sizeof(unsigned long) * SMMU_PDIR_COUNT) @@ -177,6 +175,8 @@ #define SMMU_ASID_DISABLE 0 #define SMMU_ASID_ASID(n) ((n) & ~SMMU_ASID_ENABLE(0)) +#define NUM_SMMU_REG_BANKS 3 + #define smmu_client_enable_hwgrp(c, m) smmu_client_set_hwgrp(c, m, 1) #define smmu_client_disable_hwgrp(c) smmu_client_set_hwgrp(c, 0, 0) #define __smmu_client_enable_hwgrp(c, m) __smmu_client_set_hwgrp(c, m, 1) @@ -235,14 +235,12 @@ struct smmu_as { * Per SMMU device - IOMMU device */ struct smmu_device { - void __iomem *regs, *regs_ahbarb; + void __iomem *regs[NUM_SMMU_REG_BANKS]; unsigned long iovmm_base; /* remappable base address */ unsigned long page_count; /* total remappable size */ spinlock_t lock; char *name; struct device *dev; - int num_as; - struct smmu_as *as; /* Run-time allocated array */ struct page *avp_vector_page; /* dummy page shared by all AS's */ /* @@ -252,29 +250,50 @@ struct smmu_device { unsigned long translation_enable_1; unsigned long translation_enable_2; unsigned long asid_security; + + struct device_node *ahb; + + int num_as; + struct smmu_as as[0]; /* Run-time allocated array */ }; static struct smmu_device *smmu_handle; /* unique for a system */ /* - * SMMU/AHB register accessors + * SMMU register accessors */ static inline u32 smmu_read(struct smmu_device *smmu, size_t offs) { - return readl(smmu->regs + offs); -} -static inline void smmu_write(struct smmu_device *smmu, u32 val, size_t offs) -{ - writel(val, smmu->regs + 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(); } -static inline u32 ahb_read(struct smmu_device *smmu, size_t offs) -{ - return readl(smmu->regs_ahbarb + offs); -} -static inline void ahb_write(struct smmu_device *smmu, u32 val, size_t offs) +static inline void smmu_write(struct smmu_device *smmu, u32 val, size_t offs) { - writel(val, smmu->regs_ahbarb + 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(); } #define VA_PAGE_TO_PA(va, page) \ @@ -370,7 +389,7 @@ static void smmu_flush_regs(struct smmu_device *smmu, int enable) FLUSH_SMMU_REGS(smmu); } -static void smmu_setup_regs(struct smmu_device *smmu) +static int smmu_setup_regs(struct smmu_device *smmu) { int i; u32 val; @@ -398,10 +417,7 @@ static void smmu_setup_regs(struct smmu_device *smmu) smmu_flush_regs(smmu, 1); - val = ahb_read(smmu, AHB_XBAR_CTRL); - val |= AHB_XBAR_CTRL_SMMU_INIT_DONE_DONE << - AHB_XBAR_CTRL_SMMU_INIT_DONE_SHIFT; - ahb_write(smmu, val, AHB_XBAR_CTRL); + return tegra_ahb_enable_smmu(smmu->ahb); } static void flush_ptc_and_tlb(struct smmu_device *smmu, @@ -537,33 +553,42 @@ static inline void put_signature(struct smmu_as *as, #endif /* - * Caller must lock/unlock as + * Caller must not hold as->lock */ static int alloc_pdir(struct smmu_as *as) { - unsigned long *pdir; - int pdn; + unsigned long *pdir, flags; + int pdn, err = 0; u32 val; struct smmu_device *smmu = as->smmu; + struct page *page; + unsigned int *cnt; + + /* + * do the allocation, then grab as->lock + */ + cnt = devm_kzalloc(smmu->dev, + sizeof(cnt[0]) * SMMU_PDIR_COUNT, + GFP_KERNEL); + page = alloc_page(GFP_KERNEL | __GFP_DMA); - if (as->pdir_page) - return 0; + spin_lock_irqsave(&as->lock, flags); - as->pte_count = devm_kzalloc(smmu->dev, - sizeof(as->pte_count[0]) * SMMU_PDIR_COUNT, GFP_ATOMIC); - if (!as->pte_count) { - dev_err(smmu->dev, - "failed to allocate smmu_device PTE cunters\n"); - return -ENOMEM; + if (as->pdir_page) { + /* We raced, free the redundant */ + err = -EAGAIN; + goto err_out; } - as->pdir_page = alloc_page(GFP_ATOMIC | __GFP_DMA); - if (!as->pdir_page) { - dev_err(smmu->dev, - "failed to allocate smmu_device page directory\n"); - devm_kfree(smmu->dev, as->pte_count); - as->pte_count = NULL; - return -ENOMEM; + + if (!page || !cnt) { + dev_err(smmu->dev, "failed to allocate at %s\n", __func__); + err = -ENOMEM; + goto err_out; } + + as->pdir_page = page; + as->pte_count = cnt; + SetPageReserved(as->pdir_page); pdir = page_address(as->pdir_page); @@ -579,7 +604,17 @@ static int alloc_pdir(struct smmu_as *as) smmu_write(smmu, val, SMMU_TLB_FLUSH); FLUSH_SMMU_REGS(as->smmu); + spin_unlock_irqrestore(&as->lock, flags); + return 0; + +err_out: + spin_unlock_irqrestore(&as->lock, flags); + + devm_kfree(smmu->dev, cnt); + if (page) + __free_page(page); + return err; } static void __smmu_iommu_unmap(struct smmu_as *as, dma_addr_t iova) @@ -771,30 +806,28 @@ out: static int smmu_iommu_domain_init(struct iommu_domain *domain) { - int i; + int i, err = -ENODEV; unsigned long flags; struct smmu_as *as; struct smmu_device *smmu = smmu_handle; /* Look for a free AS with lock held */ for (i = 0; i < smmu->num_as; i++) { - struct smmu_as *tmp = &smmu->as[i]; - - spin_lock_irqsave(&tmp->lock, flags); - if (!tmp->pdir_page) { - as = tmp; - goto found; + as = &smmu->as[i]; + if (!as->pdir_page) { + err = alloc_pdir(as); + if (!err) + goto found; } - spin_unlock_irqrestore(&tmp->lock, flags); + if (err != -EAGAIN) + break; } - dev_err(smmu->dev, "no free AS\n"); - return -ENODEV; + if (i == smmu->num_as) + dev_err(smmu->dev, "no free AS\n"); + return err; found: - if (alloc_pdir(as) < 0) - goto err_alloc_pdir; - - spin_lock(&smmu->lock); + spin_lock_irqsave(&smmu->lock, flags); /* Update PDIR register */ smmu_write(smmu, SMMU_PTB_ASID_CUR(as->asid), SMMU_PTB_ASID); @@ -802,17 +835,18 @@ found: SMMU_MK_PDIR(as->pdir_page, as->pdir_attr), SMMU_PTB_DATA); FLUSH_SMMU_REGS(smmu); - spin_unlock(&smmu->lock); + spin_unlock_irqrestore(&smmu->lock, flags); - spin_unlock_irqrestore(&as->lock, flags); domain->priv = as; + domain->geometry.aperture_start = smmu->iovmm_base; + domain->geometry.aperture_end = smmu->iovmm_base + + smmu->page_count * SMMU_PAGE_SIZE - 1; + domain->geometry.force_aperture = true; + dev_dbg(smmu->dev, "smmu_as@%p\n", as); - return 0; -err_alloc_pdir: - spin_unlock_irqrestore(&as->lock, flags); - return -ENODEV; + return 0; } static void smmu_iommu_domain_destroy(struct iommu_domain *domain) @@ -873,65 +907,73 @@ static int tegra_smmu_resume(struct device *dev) { struct smmu_device *smmu = dev_get_drvdata(dev); unsigned long flags; + int err; spin_lock_irqsave(&smmu->lock, flags); - smmu_setup_regs(smmu); + err = smmu_setup_regs(smmu); spin_unlock_irqrestore(&smmu->lock, flags); - return 0; + return err; } static int tegra_smmu_probe(struct platform_device *pdev) { struct smmu_device *smmu; - struct resource *regs, *regs2, *window; struct device *dev = &pdev->dev; - int i, err = 0; + int i, asids, err = 0; + dma_addr_t uninitialized_var(base); + size_t bytes, uninitialized_var(size); if (smmu_handle) return -EIO; BUILD_BUG_ON(PAGE_SHIFT != SMMU_PAGE_SHIFT); - regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); - regs2 = platform_get_resource(pdev, IORESOURCE_MEM, 1); - window = platform_get_resource(pdev, IORESOURCE_MEM, 2); - if (!regs || !regs2 || !window) { - dev_err(dev, "No SMMU resources\n"); + if (of_property_read_u32(dev->of_node, "nvidia,#asids", &asids)) return -ENODEV; - } - smmu = devm_kzalloc(dev, sizeof(*smmu), GFP_KERNEL); + bytes = sizeof(*smmu) + asids * sizeof(*smmu->as); + smmu = devm_kzalloc(dev, bytes, GFP_KERNEL); if (!smmu) { dev_err(dev, "failed to allocate smmu_device\n"); return -ENOMEM; } - smmu->dev = dev; - smmu->num_as = SMMU_NUM_ASIDS; - smmu->iovmm_base = (unsigned long)window->start; - smmu->page_count = resource_size(window) >> SMMU_PAGE_SHIFT; - smmu->regs = devm_ioremap(dev, regs->start, resource_size(regs)); - smmu->regs_ahbarb = devm_ioremap(dev, regs2->start, - resource_size(regs2)); - if (!smmu->regs || !smmu->regs_ahbarb) { - dev_err(dev, "failed to remap SMMU registers\n"); - err = -ENXIO; - goto fail; + for (i = 0; i < ARRAY_SIZE(smmu->regs); 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; } + err = of_get_dma_window(dev->of_node, NULL, 0, NULL, &base, &size); + if (err) + return -ENODEV; + + if (size & SMMU_PAGE_MASK) + return -EINVAL; + + size >>= SMMU_PAGE_SHIFT; + if (!size) + return -EINVAL; + + smmu->ahb = of_parse_phandle(dev->of_node, "nvidia,ahb", 0); + if (!smmu->ahb) + return -ENODEV; + + smmu->dev = dev; + smmu->num_as = asids; + smmu->iovmm_base = base; + smmu->page_count = size; + smmu->translation_enable_0 = ~0; smmu->translation_enable_1 = ~0; smmu->translation_enable_2 = ~0; smmu->asid_security = 0; - smmu->as = devm_kzalloc(dev, - sizeof(smmu->as[0]) * smmu->num_as, GFP_KERNEL); - if (!smmu->as) { - dev_err(dev, "failed to allocate smmu_as\n"); - err = -ENOMEM; - goto fail; - } - for (i = 0; i < smmu->num_as; i++) { struct smmu_as *as = &smmu->as[i]; @@ -945,57 +987,28 @@ static int tegra_smmu_probe(struct platform_device *pdev) INIT_LIST_HEAD(&as->client); } spin_lock_init(&smmu->lock); - smmu_setup_regs(smmu); + err = smmu_setup_regs(smmu); + if (err) + return err; platform_set_drvdata(pdev, smmu); smmu->avp_vector_page = alloc_page(GFP_KERNEL); if (!smmu->avp_vector_page) - goto fail; + return -ENOMEM; smmu_handle = smmu; return 0; - -fail: - if (smmu->avp_vector_page) - __free_page(smmu->avp_vector_page); - if (smmu->regs) - devm_iounmap(dev, smmu->regs); - if (smmu->regs_ahbarb) - devm_iounmap(dev, smmu->regs_ahbarb); - if (smmu && smmu->as) { - for (i = 0; i < smmu->num_as; i++) { - if (smmu->as[i].pdir_page) { - ClearPageReserved(smmu->as[i].pdir_page); - __free_page(smmu->as[i].pdir_page); - } - } - devm_kfree(dev, smmu->as); - } - devm_kfree(dev, smmu); - return err; } static int tegra_smmu_remove(struct platform_device *pdev) { struct smmu_device *smmu = platform_get_drvdata(pdev); - struct device *dev = smmu->dev; + int i; smmu_write(smmu, SMMU_CONFIG_DISABLE, SMMU_CONFIG); - platform_set_drvdata(pdev, NULL); - if (smmu->as) { - int i; - - for (i = 0; i < smmu->num_as; i++) - free_pdir(&smmu->as[i]); - devm_kfree(dev, smmu->as); - } - if (smmu->avp_vector_page) - __free_page(smmu->avp_vector_page); - if (smmu->regs) - devm_iounmap(dev, smmu->regs); - if (smmu->regs_ahbarb) - devm_iounmap(dev, smmu->regs_ahbarb); - devm_kfree(dev, smmu); + for (i = 0; i < smmu->num_as; i++) + free_pdir(&smmu->as[i]); + __free_page(smmu->avp_vector_page); smmu_handle = NULL; return 0; } @@ -1005,6 +1018,14 @@ const struct dev_pm_ops tegra_smmu_pm_ops = { .resume = tegra_smmu_resume, }; +#ifdef CONFIG_OF +static struct of_device_id tegra_smmu_of_match[] __devinitdata = { + { .compatible = "nvidia,tegra30-smmu", }, + { }, +}; +MODULE_DEVICE_TABLE(of, tegra_smmu_of_match); +#endif + static struct platform_driver tegra_smmu_driver = { .probe = tegra_smmu_probe, .remove = tegra_smmu_remove, @@ -1012,6 +1033,7 @@ 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), }, }; @@ -1031,4 +1053,5 @@ module_exit(tegra_smmu_exit); MODULE_DESCRIPTION("IOMMU API for SMMU in Tegra30"); MODULE_AUTHOR("Hiroshi DOYU <hdoyu@nvidia.com>"); +MODULE_ALIAS("platform:tegra-smmu"); MODULE_LICENSE("GPL v2"); |