diff options
29 files changed, 1238 insertions, 406 deletions
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index aa6c8f834d9e..290a84f3351f 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -796,6 +796,8 @@ static struct dma_map_ops iommu_dma_ops = { .sync_single_for_device = __iommu_sync_single_for_device, .sync_sg_for_cpu = __iommu_sync_sg_for_cpu, .sync_sg_for_device = __iommu_sync_sg_for_device, + .map_resource = iommu_dma_map_resource, + .unmap_resource = iommu_dma_unmap_resource, .dma_supported = iommu_dma_supported, .mapping_error = iommu_dma_mapping_error, }; diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 6b81746cd13c..e0d2e6e6e40c 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -19,8 +19,17 @@ #define pr_fmt(fmt) "ACPI: IORT: " fmt #include <linux/acpi_iort.h> +#include <linux/iommu.h> #include <linux/kernel.h> +#include <linux/list.h> #include <linux/pci.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#define IORT_TYPE_MASK(type) (1 << (type)) +#define IORT_MSI_TYPE (1 << ACPI_IORT_NODE_ITS_GROUP) +#define IORT_IOMMU_TYPE ((1 << ACPI_IORT_NODE_SMMU) | \ + (1 << ACPI_IORT_NODE_SMMU_V3)) struct iort_its_msi_chip { struct list_head list; @@ -28,6 +37,90 @@ struct iort_its_msi_chip { u32 translation_id; }; +struct iort_fwnode { + struct list_head list; + struct acpi_iort_node *iort_node; + struct fwnode_handle *fwnode; +}; +static LIST_HEAD(iort_fwnode_list); +static DEFINE_SPINLOCK(iort_fwnode_lock); + +/** + * iort_set_fwnode() - Create iort_fwnode and use it to register + * iommu data in the iort_fwnode_list + * + * @node: IORT table node associated with the IOMMU + * @fwnode: fwnode associated with the IORT node + * + * Returns: 0 on success + * <0 on failure + */ +static inline int iort_set_fwnode(struct acpi_iort_node *iort_node, + struct fwnode_handle *fwnode) +{ + struct iort_fwnode *np; + + np = kzalloc(sizeof(struct iort_fwnode), GFP_ATOMIC); + + if (WARN_ON(!np)) + return -ENOMEM; + + INIT_LIST_HEAD(&np->list); + np->iort_node = iort_node; + np->fwnode = fwnode; + + spin_lock(&iort_fwnode_lock); + list_add_tail(&np->list, &iort_fwnode_list); + spin_unlock(&iort_fwnode_lock); + + return 0; +} + +/** + * iort_get_fwnode() - Retrieve fwnode associated with an IORT node + * + * @node: IORT table node to be looked-up + * + * Returns: fwnode_handle pointer on success, NULL on failure + */ +static inline +struct fwnode_handle *iort_get_fwnode(struct acpi_iort_node *node) +{ + struct iort_fwnode *curr; + struct fwnode_handle *fwnode = NULL; + + spin_lock(&iort_fwnode_lock); + list_for_each_entry(curr, &iort_fwnode_list, list) { + if (curr->iort_node == node) { + fwnode = curr->fwnode; + break; + } + } + spin_unlock(&iort_fwnode_lock); + + return fwnode; +} + +/** + * iort_delete_fwnode() - Delete fwnode associated with an IORT node + * + * @node: IORT table node associated with fwnode to delete + */ +static inline void iort_delete_fwnode(struct acpi_iort_node *node) +{ + struct iort_fwnode *curr, *tmp; + + spin_lock(&iort_fwnode_lock); + list_for_each_entry_safe(curr, tmp, &iort_fwnode_list, list) { + if (curr->iort_node == node) { + list_del(&curr->list); + kfree(curr); + break; + } + } + spin_unlock(&iort_fwnode_lock); +} + typedef acpi_status (*iort_find_node_callback) (struct acpi_iort_node *node, void *context); @@ -141,6 +234,21 @@ static struct acpi_iort_node *iort_scan_node(enum acpi_iort_node_type type, return NULL; } +static acpi_status +iort_match_type_callback(struct acpi_iort_node *node, void *context) +{ + return AE_OK; +} + +bool iort_node_match(u8 type) +{ + struct acpi_iort_node *node; + + node = iort_scan_node(type, iort_match_type_callback, NULL); + + return node != NULL; +} + static acpi_status iort_match_node_callback(struct acpi_iort_node *node, void *context) { @@ -212,9 +320,48 @@ static int iort_id_map(struct acpi_iort_id_mapping *map, u8 type, u32 rid_in, return 0; } +static +struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node, + u32 *id_out, u8 type_mask, + int index) +{ + struct acpi_iort_node *parent; + struct acpi_iort_id_mapping *map; + + if (!node->mapping_offset || !node->mapping_count || + index >= node->mapping_count) + return NULL; + + map = ACPI_ADD_PTR(struct acpi_iort_id_mapping, node, + node->mapping_offset); + + /* Firmware bug! */ + if (!map->output_reference) { + pr_err(FW_BUG "[node %p type %d] ID map has NULL parent reference\n", + node, node->type); + return NULL; + } + + parent = ACPI_ADD_PTR(struct acpi_iort_node, iort_table, + map->output_reference); + + if (!(IORT_TYPE_MASK(parent->type) & type_mask)) + return NULL; + + if (map[index].flags & ACPI_IORT_ID_SINGLE_MAPPING) { + if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT || + node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) { + *id_out = map[index].output_base; + return parent; + } + } + + return NULL; +} + static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node, u32 rid_in, u32 *rid_out, - u8 type) + u8 type_mask) { u32 rid = rid_in; @@ -223,7 +370,7 @@ static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node, struct acpi_iort_id_mapping *map; int i; - if (node->type == type) { + if (IORT_TYPE_MASK(node->type) & type_mask) { if (rid_out) *rid_out = rid; return node; @@ -296,7 +443,7 @@ u32 iort_msi_map_rid(struct device *dev, u32 req_id) if (!node) return req_id; - iort_node_map_rid(node, req_id, &dev_id, ACPI_IORT_NODE_ITS_GROUP); + iort_node_map_rid(node, req_id, &dev_id, IORT_MSI_TYPE); return dev_id; } @@ -318,7 +465,7 @@ static int iort_dev_find_its_id(struct device *dev, u32 req_id, if (!node) return -ENXIO; - node = iort_node_map_rid(node, req_id, NULL, ACPI_IORT_NODE_ITS_GROUP); + node = iort_node_map_rid(node, req_id, NULL, IORT_MSI_TYPE); if (!node) return -ENXIO; @@ -356,13 +503,459 @@ struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id) return irq_find_matching_fwnode(handle, DOMAIN_BUS_PCI_MSI); } +static int __get_pci_rid(struct pci_dev *pdev, u16 alias, void *data) +{ + u32 *rid = data; + + *rid = alias; + return 0; +} + +static int arm_smmu_iort_xlate(struct device *dev, u32 streamid, + struct fwnode_handle *fwnode, + const struct iommu_ops *ops) +{ + int ret = iommu_fwspec_init(dev, fwnode, ops); + + if (!ret) + ret = iommu_fwspec_add_ids(dev, &streamid, 1); + + return ret; +} + +static const struct iommu_ops *iort_iommu_xlate(struct device *dev, + struct acpi_iort_node *node, + u32 streamid) +{ + const struct iommu_ops *ops = NULL; + int ret = -ENODEV; + struct fwnode_handle *iort_fwnode; + + if (node) { + iort_fwnode = iort_get_fwnode(node); + if (!iort_fwnode) + return NULL; + + ops = iommu_get_instance(iort_fwnode); + if (!ops) + return NULL; + + ret = arm_smmu_iort_xlate(dev, streamid, iort_fwnode, ops); + } + + return ret ? NULL : ops; +} + +/** + * iort_set_dma_mask - Set-up dma mask for a device. + * + * @dev: device to configure + */ +void iort_set_dma_mask(struct device *dev) +{ + /* + * Set default coherent_dma_mask to 32 bit. Drivers are expected to + * setup the correct supported mask. + */ + if (!dev->coherent_dma_mask) + dev->coherent_dma_mask = DMA_BIT_MASK(32); + + /* + * Set it to coherent_dma_mask by default if the architecture + * code has not set it. + */ + if (!dev->dma_mask) + dev->dma_mask = &dev->coherent_dma_mask; +} + +/** + * iort_iommu_configure - Set-up IOMMU configuration for a device. + * + * @dev: device to configure + * + * Returns: iommu_ops pointer on configuration success + * NULL on configuration failure + */ +const struct iommu_ops *iort_iommu_configure(struct device *dev) +{ + struct acpi_iort_node *node, *parent; + const struct iommu_ops *ops = NULL; + u32 streamid = 0; + + if (dev_is_pci(dev)) { + struct pci_bus *bus = to_pci_dev(dev)->bus; + u32 rid; + + pci_for_each_dma_alias(to_pci_dev(dev), __get_pci_rid, + &rid); + + node = iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX, + iort_match_node_callback, &bus->dev); + if (!node) + return NULL; + + parent = iort_node_map_rid(node, rid, &streamid, + IORT_IOMMU_TYPE); + + ops = iort_iommu_xlate(dev, parent, streamid); + + } else { + int i = 0; + + node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT, + iort_match_node_callback, dev); + if (!node) + return NULL; + + parent = iort_node_get_id(node, &streamid, + IORT_IOMMU_TYPE, i++); + + while (parent) { + ops = iort_iommu_xlate(dev, parent, streamid); + + parent = iort_node_get_id(node, &streamid, + IORT_IOMMU_TYPE, i++); + } + } + + return ops; +} + +static void __init acpi_iort_register_irq(int hwirq, const char *name, + int trigger, + struct resource *res) +{ + int irq = acpi_register_gsi(NULL, hwirq, trigger, + ACPI_ACTIVE_HIGH); + + if (irq <= 0) { + pr_err("could not register gsi hwirq %d name [%s]\n", hwirq, + name); + return; + } + + res->start = irq; + res->end = irq; + res->flags = IORESOURCE_IRQ; + res->name = name; +} + +static int __init arm_smmu_v3_count_resources(struct acpi_iort_node *node) +{ + struct acpi_iort_smmu_v3 *smmu; + /* Always present mem resource */ + int num_res = 1; + + /* Retrieve SMMUv3 specific data */ + smmu = (struct acpi_iort_smmu_v3 *)node->node_data; + + if (smmu->event_gsiv) + num_res++; + + if (smmu->pri_gsiv) + num_res++; + + if (smmu->gerr_gsiv) + num_res++; + + if (smmu->sync_gsiv) + num_res++; + + return num_res; +} + +static void __init arm_smmu_v3_init_resources(struct resource *res, + struct acpi_iort_node *node) +{ + struct acpi_iort_smmu_v3 *smmu; + int num_res = 0; + + /* Retrieve SMMUv3 specific data */ + smmu = (struct acpi_iort_smmu_v3 *)node->node_data; + + res[num_res].start = smmu->base_address; + res[num_res].end = smmu->base_address + SZ_128K - 1; + res[num_res].flags = IORESOURCE_MEM; + + num_res++; + + if (smmu->event_gsiv) + acpi_iort_register_irq(smmu->event_gsiv, "eventq", + ACPI_EDGE_SENSITIVE, + &res[num_res++]); + + if (smmu->pri_gsiv) + acpi_iort_register_irq(smmu->pri_gsiv, "priq", + ACPI_EDGE_SENSITIVE, + &res[num_res++]); + + if (smmu->gerr_gsiv) + acpi_iort_register_irq(smmu->gerr_gsiv, "gerror", + ACPI_EDGE_SENSITIVE, + &res[num_res++]); + + if (smmu->sync_gsiv) + acpi_iort_register_irq(smmu->sync_gsiv, "cmdq-sync", + ACPI_EDGE_SENSITIVE, + &res[num_res++]); +} + +static bool __init arm_smmu_v3_is_coherent(struct acpi_iort_node *node) +{ + struct acpi_iort_smmu_v3 *smmu; + + /* Retrieve SMMUv3 specific data */ + smmu = (struct acpi_iort_smmu_v3 *)node->node_data; + + return smmu->flags & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE; +} + +static int __init arm_smmu_count_resources(struct acpi_iort_node *node) +{ + struct acpi_iort_smmu *smmu; + + /* Retrieve SMMU specific data */ + smmu = (struct acpi_iort_smmu *)node->node_data; + + /* + * Only consider the global fault interrupt and ignore the + * configuration access interrupt. + * + * MMIO address and global fault interrupt resources are always + * present so add them to the context interrupt count as a static + * value. + */ + return smmu->context_interrupt_count + 2; +} + +static void __init arm_smmu_init_resources(struct resource *res, + struct acpi_iort_node *node) +{ + struct acpi_iort_smmu *smmu; + int i, hw_irq, trigger, num_res = 0; + u64 *ctx_irq, *glb_irq; + + /* Retrieve SMMU specific data */ + smmu = (struct acpi_iort_smmu *)node->node_data; + + res[num_res].start = smmu->base_address; + res[num_res].end = smmu->base_address + smmu->span - 1; + res[num_res].flags = IORESOURCE_MEM; + num_res++; + + glb_irq = ACPI_ADD_PTR(u64, node, smmu->global_interrupt_offset); + /* Global IRQs */ + hw_irq = IORT_IRQ_MASK(glb_irq[0]); + trigger = IORT_IRQ_TRIGGER_MASK(glb_irq[0]); + + acpi_iort_register_irq(hw_irq, "arm-smmu-global", trigger, + &res[num_res++]); + + /* Context IRQs */ + ctx_irq = ACPI_ADD_PTR(u64, node, smmu->context_interrupt_offset); + for (i = 0; i < smmu->context_interrupt_count; i++) { + hw_irq = IORT_IRQ_MASK(ctx_irq[i]); + trigger = IORT_IRQ_TRIGGER_MASK(ctx_irq[i]); + + acpi_iort_register_irq(hw_irq, "arm-smmu-context", trigger, + &res[num_res++]); + } +} + +static bool __init arm_smmu_is_coherent(struct acpi_iort_node *node) +{ + struct acpi_iort_smmu *smmu; + + /* Retrieve SMMU specific data */ + smmu = (struct acpi_iort_smmu *)node->node_data; + + return smmu->flags & ACPI_IORT_SMMU_COHERENT_WALK; +} + +struct iort_iommu_config { + const char *name; + int (*iommu_init)(struct acpi_iort_node *node); + bool (*iommu_is_coherent)(struct acpi_iort_node *node); + int (*iommu_count_resources)(struct acpi_iort_node *node); + void (*iommu_init_resources)(struct resource *res, + struct acpi_iort_node *node); +}; + +static const struct iort_iommu_config iort_arm_smmu_v3_cfg __initconst = { + .name = "arm-smmu-v3", + .iommu_is_coherent = arm_smmu_v3_is_coherent, + .iommu_count_resources = arm_smmu_v3_count_resources, + .iommu_init_resources = arm_smmu_v3_init_resources +}; + +static const struct iort_iommu_config iort_arm_smmu_cfg __initconst = { + .name = "arm-smmu", + .iommu_is_coherent = arm_smmu_is_coherent, + .iommu_count_resources = arm_smmu_count_resources, + .iommu_init_resources = arm_smmu_init_resources +}; + +static __init +const struct iort_iommu_config *iort_get_iommu_cfg(struct acpi_iort_node *node) +{ + switch (node->type) { + case ACPI_IORT_NODE_SMMU_V3: + return &iort_arm_smmu_v3_cfg; + case ACPI_IORT_NODE_SMMU: + return &iort_arm_smmu_cfg; + default: + return NULL; + } +} + +/** + * iort_add_smmu_platform_device() - Allocate a platform device for SMMU + * @node: Pointer to SMMU ACPI IORT node + * + * Returns: 0 on success, <0 failure + */ +static int __init iort_add_smmu_platform_device(struct acpi_iort_node *node) +{ + struct fwnode_handle *fwnode; + struct platform_device *pdev; + struct resource *r; + enum dev_dma_attr attr; + int ret, count; + const struct iort_iommu_config *ops = iort_get_iommu_cfg(node); + + if (!ops) + return -ENODEV; + + pdev = platform_device_alloc(ops->name, PLATFORM_DEVID_AUTO); + if (!pdev) + return PTR_ERR(pdev); + + count = ops->iommu_count_resources(node); + + r = kcalloc(count, sizeof(*r), GFP_KERNEL); + if (!r) { + ret = -ENOMEM; + goto dev_put; + } + + ops->iommu_init_resources(r, node); + + ret = platform_device_add_resources(pdev, r, count); + /* + * Resources are duplicated in platform_device_add_resources, + * free their allocated memory + */ + kfree(r); + + if (ret) + goto dev_put; + + /* + * Add a copy of IORT node pointer to platform_data to + * be used to retrieve IORT data information. + */ + ret = platform_device_add_data(pdev, &node, sizeof(node)); + if (ret) + goto dev_put; + + /* + * We expect the dma masks to be equivalent for + * all SMMUs set-ups + */ + pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; + + fwnode = iort_get_fwnode(node); + + if (!fwnode) { + ret = -ENODEV; + goto dev_put; + } + + pdev->dev.fwnode = fwnode; + + attr = ops->iommu_is_coherent(node) ? + DEV_DMA_COHERENT : DEV_DMA_NON_COHERENT; + + /* Configure DMA for the page table walker */ + acpi_dma_configure(&pdev->dev, attr); + + ret = platform_device_add(pdev); + if (ret) + goto dma_deconfigure; + + return 0; + +dma_deconfigure: + acpi_dma_deconfigure(&pdev->dev); +dev_put: + platform_device_put(pdev); + + return ret; +} + +static void __init iort_init_platform_devices(void) +{ + struct acpi_iort_node *iort_node, *iort_end; + struct acpi_table_iort *iort; + struct fwnode_handle *fwnode; + int i, ret; + + /* + * iort_table and iort both point to the start of IORT table, but + * have different struct types + */ + iort = (struct acpi_table_iort *)iort_table; + + /* Get the first IORT node */ + iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort, + iort->node_offset); + iort_end = ACPI_ADD_PTR(struct acpi_iort_node, iort, + iort_table->length); + + for (i = 0; i < iort->node_count; i++) { + if (iort_node >= iort_end) { + pr_err("iort node pointer overflows, bad table\n"); + return; + } + + if ((iort_node->type == ACPI_IORT_NODE_SMMU) || + (iort_node->type == ACPI_IORT_NODE_SMMU_V3)) { + + fwnode = acpi_alloc_fwnode_static(); + if (!fwnode) + return; + + iort_set_fwnode(iort_node, fwnode); + + ret = iort_add_smmu_platform_device(iort_node); + if (ret) { + iort_delete_fwnode(iort_node); + acpi_free_fwnode_static(fwnode); + return; + } + } + + iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort_node, + iort_node->length); + } +} + void __init acpi_iort_init(void) { acpi_status status; status = acpi_get_table(ACPI_SIG_IORT, 0, &iort_table); - if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { - const char *msg = acpi_format_exception(status); - pr_err("Failed to get table, %s\n", msg); + if (ACPI_FAILURE(status)) { + if (status != AE_NOT_FOUND) { + const char *msg = acpi_format_exception(status); + + pr_err("Failed to get table, %s\n", msg); + } + + return; } + + iort_init_platform_devices(); + + acpi_probe_device_table(iort); } diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c index 5ea5dc219f56..f8d65647ea79 100644 --- a/drivers/acpi/glue.c +++ b/drivers/acpi/glue.c @@ -227,8 +227,7 @@ int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev) attr = acpi_get_dma_attr(acpi_dev); if (attr != DEV_DMA_NOT_SUPPORTED) - arch_setup_dma_ops(dev, 0, 0, NULL, - attr == DEV_DMA_COHERENT); + acpi_dma_configure(dev, attr); acpi_physnode_link_name(physical_node_name, node_id); retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj, @@ -251,6 +250,7 @@ int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev) return 0; err: + acpi_dma_deconfigure(dev); ACPI_COMPANION_SET(dev, NULL); put_device(dev); put_device(&acpi_dev->dev); diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 3d1856f1f4d0..93b00cf4eb39 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -7,6 +7,7 @@ #include <linux/slab.h> #include <linux/kernel.h> #include <linux/acpi.h> +#include <linux/acpi_iort.h> #include <linux/signal.h> #include <linux/kthread.h> #include <linux/dmi.h> @@ -1370,6 +1371,38 @@ enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev) return DEV_DMA_NON_COHERENT; } +/** + * acpi_dma_configure - Set-up DMA configuration for the device. + * @dev: The pointer to the device + * @attr: device dma attributes + */ +void acpi_dma_configure(struct device *dev, enum dev_dma_attr attr) +{ + const struct iommu_ops *iommu; + + iort_set_dma_mask(dev); + + iommu = iort_iommu_configure(dev); + + /* + * Assume dma valid range starts at 0 and covers the whole + * coherent_dma_mask. + */ + arch_setup_dma_ops(dev, 0, dev->coherent_dma_mask + 1, iommu, + attr == DEV_DMA_COHERENT); +} +EXPORT_SYMBOL_GPL(acpi_dma_configure); + +/** + * acpi_dma_deconfigure - Tear-down DMA configuration for the device. + * @dev: The pointer to the device + */ +void acpi_dma_deconfigure(struct device *dev) +{ + arch_teardown_dma_ops(dev); +} +EXPORT_SYMBOL_GPL(acpi_dma_deconfigure); + static void acpi_init_coherency(struct acpi_device *adev) { unsigned long long cca = 0; diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 754595ee11b6..019e02707cd5 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -373,6 +373,8 @@ static struct iommu_group *acpihid_device_group(struct device *dev) if (!entry->group) entry->group = generic_device_group(dev); + else + iommu_group_ref_get(entry->group); return entry->group; } diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 157e93421fb8..971154cbbb03 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -28,6 +28,7 @@ #include <linux/amd-iommu.h> #include <linux/export.h> #include <linux/iommu.h> +#include <linux/kmemleak.h> #include <asm/pci-direct.h> #include <asm/iommu.h> #include <asm/gart.h> @@ -2090,6 +2091,7 @@ static struct syscore_ops amd_iommu_syscore_ops = { static void __init free_on_init_error(void) { + kmemleak_free(irq_lookup_table); free_pages((unsigned long)irq_lookup_table, get_order(rlookup_table_size)); @@ -2321,6 +2323,8 @@ static int __init early_amd_iommu_init(void) irq_lookup_table = (void *)__get_free_pages( GFP_KERNEL | __GFP_ZERO, get_order(rlookup_table_size)); + kmemleak_alloc(irq_lookup_table, rlookup_table_size, + 1, GFP_KERNEL); if (!irq_lookup_table) goto out; } diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c index 594849a3a9be..f8ed8c95b685 100644 --- a/drivers/iommu/amd_iommu_v2.c +++ b/drivers/iommu/amd_iommu_v2.c @@ -805,8 +805,10 @@ int amd_iommu_init_device(struct pci_dev *pdev, int pasids) goto out_free_domain; group = iommu_group_get(&pdev->dev); - if (!group) + if (!group) { + ret = -EINVAL; goto out_free_domain; + } ret = iommu_attach_group(dev_state->domain, group); if (ret != 0) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index e6f9b2d745ca..4d6ec444a9d6 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -20,6 +20,8 @@ * This driver is powered by bad coffee and bombay mix. */ +#include <linux/acpi.h> +#include <linux/acpi_iort.h> #include <linux/delay.h> #include <linux/dma-iommu.h> #include <linux/err.h> @@ -1358,7 +1360,7 @@ static void arm_smmu_tlb_inv_range_nosync(unsigned long iova, size_t size, } while (size -= granule); } -static struct iommu_gather_ops arm_smmu_gather_ops = { +static const struct iommu_gather_ops arm_smmu_gather_ops = { .tlb_flush_all = arm_smmu_tlb_inv_context, .tlb_add_flush = arm_smmu_tlb_inv_range_nosync, .tlb_sync = arm_smmu_tlb_sync, @@ -1723,13 +1725,14 @@ static struct platform_driver arm_smmu_driver; static int arm_smmu_match_node(struct device *dev, void *data) { - return dev->of_node == data; + return dev->fwnode == data; } -static struct arm_smmu_device *arm_smmu_get_by_node(struct device_node *np) +static +struct arm_smmu_device *arm_smmu_get_by_fwnode(struct fwnode_handle *fwnode) { struct device *dev = driver_find_device(&arm_smmu_driver.driver, NULL, - np, arm_smmu_match_node); + fwnode, arm_smmu_match_node); put_device(dev); return dev ? dev_get_drvdata(dev) : NULL; } @@ -1765,7 +1768,7 @@ static int arm_smmu_add_device(struct device *dev) master = fwspec->iommu_priv; smmu = master->smmu; } else { - smmu = arm_smmu_get_by_node(to_of_node(fwspec->iommu_fwnode)); + smmu = arm_smmu_get_by_fwnode(fwspec->iommu_fwnode); if (!smmu) return -ENODEV; master = kzalloc(sizeof(*master), GFP_KERNEL); @@ -2380,10 +2383,10 @@ static int arm_smmu_device_reset(struct arm_smmu_device *smmu, bool bypass) return 0; } -static int arm_smmu_device_probe(struct arm_smmu_device *smmu) +static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu) { u32 reg; - bool coherent; + bool coherent = smmu->features & ARM_SMMU_FEAT_COHERENCY; /* IDR0 */ reg = readl_relaxed(smmu->base + ARM_SMMU_IDR0); @@ -2435,13 +2438,9 @@ static int arm_smmu_device_probe(struct arm_smmu_device *smmu) smmu->features |= ARM_SMMU_FEAT_HYP; /* - * The dma-coherent property is used in preference to the ID + * The coherency feature as set by FW is used in preference to the ID * register, but warn on mismatch. */ - coherent = of_dma_is_coherent(smmu->dev->of_node); - if (coherent) - smmu->features |= ARM_SMMU_FEAT_COHERENCY; - if (!!(reg & IDR0_COHACC) != coherent) dev_warn(smmu->dev, "IDR0.COHACC overridden by dma-coherent property (%s)\n", coherent ? "true" : "false"); @@ -2562,21 +2561,61 @@ static int arm_smmu_device_probe(struct arm_smmu_device *smmu) return 0; } -static int arm_smmu_device_dt_probe(struct platform_device *pdev) +#ifdef CONFIG_ACPI +static int arm_smmu_device_acpi_probe(struct platform_device *pdev, + struct arm_smmu_device *smmu) +{ + struct acpi_iort_smmu_v3 *iort_smmu; + struct device *dev = smmu->dev; + struct acpi_iort_node *node; + + node = *(struct acpi_iort_node **)dev_get_platdata(dev); + + /* Retrieve SMMUv3 specific data */ + iort_smmu = (struct acpi_iort_smmu_v3 *)node->node_data; + + if (iort_smmu->flags & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE) + smmu->features |= ARM_SMMU_FEAT_COHERENCY; + + return 0; +} +#else +static inline int arm_smmu_device_acpi_probe(struct platform_device *pdev, + struct arm_smmu_device *smmu) +{ + return -ENODEV; +} +#endif + +static int arm_smmu_device_dt_probe(struct platform_device *pdev, + struct arm_smmu_device *smmu) { - int irq, ret; - struct resource *res; - struct arm_smmu_device *smmu; struct device *dev = &pdev->dev; - bool bypass = true; u32 cells; + int ret = -EINVAL; if (of_property_read_u32(dev->of_node, "#iommu-cells", &cells)) dev_err(dev, "missing #iommu-cells property\n"); else if (cells != 1) dev_err(dev, "invalid #iommu-cells value (%d)\n", cells); else - bypass = false; + ret = 0; + + parse_driver_options(smmu); + + if (of_dma_is_coherent(dev->of_node)) + smmu->features |= ARM_SMMU_FEAT_COHERENCY; + + return ret; +} + +static int arm_smmu_device_probe(struct platform_device *pdev) +{ + int irq, ret; + struct resource *res; + struct arm_smmu_device *smmu; + struct device *dev = &pdev->dev; + bool bypass; smmu = devm_kzalloc(dev, sizeof(*smmu), GFP_KERNEL); if (!smmu) { @@ -2613,10 +2652,19 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev) if (irq > 0) smmu->gerr_irq = irq; - parse_driver_options(smmu); + if (dev->of_node) { + ret = arm_smmu_device_dt_probe(pdev, smmu); + } else { + ret = arm_smmu_device_acpi_probe(pdev, smmu); + if (ret == -ENODEV) + return ret; + } + + /* Set bypass mode according to firmware probing result */ + bypass = !!ret; /* Probe the h/w */ - ret = arm_smmu_device_probe(smmu); + ret = arm_smmu_device_hw_probe(smmu); if (ret) return ret; @@ -2634,7 +2682,8 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev) return ret; /* And we're up. Go go go! */ - of_iommu_set_ops(dev->of_node, &arm_smmu_ops); + iommu_register_instance(dev->fwnode, &arm_smmu_ops); + #ifdef CONFIG_PCI if (pci_bus_type.iommu_ops != &arm_smmu_ops) { pci_request_acs(); @@ -2677,7 +2726,7 @@ static struct platform_driver arm_smmu_driver = { .name = "arm-smmu-v3", .of_match_table = of_match_ptr(arm_smmu_of_match), }, - .probe = arm_smmu_device_dt_probe, + .probe = arm_smmu_device_probe, .remove = arm_smmu_device_remove, }; @@ -2715,6 +2764,17 @@ static int __init arm_smmu_of_init(struct device_node *np) } IOMMU_OF_DECLARE(arm_smmuv3, "arm,smmu-v3", arm_smmu_of_init); +#ifdef CONFIG_ACPI +static int __init acpi_smmu_v3_init(struct acpi_table_header *table) +{ + if (iort_node_match(ACPI_IORT_NODE_SMMU_V3)) + return arm_smmu_init(); + + return 0; +} +IORT_ACPI_DECLARE(arm_smmu_v3, ACPI_SIG_IORT, acpi_smmu_v3_init); +#endif + MODULE_DESCRIPTION("IOMMU API for ARM architected SMMUv3 implementations"); MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 8f7281444551..a60cded8a6ed 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -28,6 +28,8 @@ #define pr_fmt(fmt) "arm-smmu: " fmt +#include <linux/acpi.h> +#include <linux/acpi_iort.h> #include <linux/atomic.h> #include <linux/delay.h> #include <linux/dma-iommu.h> @@ -247,6 +249,7 @@ enum arm_smmu_s2cr_privcfg { #define ARM_MMU500_ACTLR_CPRE (1 << 1) #define ARM_MMU500_ACR_CACHE_LOCK (1 << 26) +#define ARM_MMU500_ACR_SMTNMB_TLBEN (1 << 8) #define CB_PAR_F (1 << 0) @@ -642,7 +645,7 @@ static void arm_smmu_tlb_inv_range_nosync(unsigned long iova, size_t size, } } -static struct iommu_gather_ops arm_smmu_gather_ops = { +static const struct iommu_gather_ops arm_smmu_gather_ops = { .tlb_flush_all = arm_smmu_tlb_inv_context, .tlb_add_flush = arm_smmu_tlb_inv_range_nosync, .tlb_sync = arm_smmu_tlb_sync, @@ -1379,13 +1382,14 @@ static bool arm_smmu_capable(enum iommu_cap cap) static int arm_smmu_match_node(struct device *dev, void *data) { - return dev->of_node == data; + return dev->fwnode == data; } -static struct arm_smmu_device *arm_smmu_get_by_node(struct device_node *np) +static +struct arm_smmu_device *arm_smmu_get_by_fwnode(struct fwnode_handle *fwnode) { struct device *dev = driver_find_device(&arm_smmu_driver.driver, NULL, - np, arm_smmu_match_node); + fwnode, arm_smmu_match_node); put_device(dev); return dev ? dev_get_drvdata(dev) : NULL; } @@ -1403,7 +1407,7 @@ static int arm_smmu_add_device(struct device *dev) if (ret) goto out_free; } else if (fwspec && fwspec->ops == &arm_smmu_ops) { - smmu = arm_smmu_get_by_node(to_of_node(fwspec->iommu_fwnode)); + smmu = arm_smmu_get_by_fwnode(fwspec->iommu_fwnode); } else { return -ENODEV; } @@ -1478,7 +1482,7 @@ static struct iommu_group *arm_smmu_device_group(struct device *dev) } if (group) - return group; + return iommu_group_ref_get(group); if (dev_is_pci(dev)) group = pci_device_group(dev); @@ -1581,16 +1585,22 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu) for (i = 0; i < smmu->num_mapping_groups; ++i) arm_smmu_write_sme(smmu, i); - /* - * Before clearing ARM_MMU500_ACTLR_CPRE, need to - * clear CACHE_LOCK bit of ACR first. And, CACHE_LOCK - * bit is only present in MMU-500r2 onwards. - */ - reg = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID7); - major = (reg >> ID7_MAJOR_SHIFT) & ID7_MAJOR_MASK; - if ((smmu->model == ARM_MMU500) && (major >= 2)) { + if (smmu->model == ARM_MMU500) { + /* + * Before clearing ARM_MMU500_ACTLR_CPRE, need to + * clear CACHE_LOCK bit of ACR first. And, CACHE_LOCK + * bit is only present in MMU-500r2 onwards. + */ + reg = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID7); + major = (reg >> ID7_MAJOR_SHIFT) & ID7_MAJOR_MASK; reg = readl_relaxed(gr0_base + ARM_SMMU_GR0_sACR); - reg &= ~ARM_MMU500_ACR_CACHE_LOCK; + if (major >= 2) + reg &= ~ARM_MMU500_ACR_CACHE_LOCK; + /* + * Allow unmatched Stream IDs to allocate bypass + * TLB entries for reduced latency. + */ + reg |= ARM_MMU500_ACR_SMTNMB_TLBEN; writel_relaxed(reg, gr0_base + ARM_SMMU_GR0_sACR); } @@ -1667,7 +1677,7 @@ 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; - bool cttw_dt, cttw_reg; + bool cttw_reg, cttw_fw = smmu->features & ARM_SMMU_FEAT_COHERENT_WALK; int i; dev_notice(smmu->dev, "probing hardware configuration...\n"); @@ -1712,20 +1722,17 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu) /* * In order for DMA API calls to work properly, we must defer to what - * the DT says about coherency, regardless of what the hardware claims. + * the FW says about coherency, regardless of what the hardware claims. * Fortunately, this also opens up a workaround for systems where the * ID register value has ended up configured incorrectly. */ - cttw_dt = of_dma_is_coherent(smmu->dev->of_node); cttw_reg = !!(id & ID0_CTTW); - if (cttw_dt) - smmu->features |= ARM_SMMU_FEAT_COHERENT_WALK; - if (cttw_dt || cttw_reg) + if (cttw_fw || cttw_reg) dev_notice(smmu->dev, "\t%scoherent table walk\n", - cttw_dt ? "" : "non-"); - if (cttw_dt != cttw_reg) + cttw_fw ? "" : "non-"); + if (cttw_fw != cttw_reg) dev_notice(smmu->dev, - "\t(IDR0.CTTW overridden by dma-coherent property)\n"); + "\t(IDR0.CTTW overridden by FW configuration)\n"); /* Max. number of entries we have for stream matching/indexing */ size = 1 << ((id >> ID0_NUMSIDB_SHIFT) & ID0_NUMSIDB_MASK); @@ -1906,15 +1913,83 @@ static const struct of_device_id arm_smmu_of_match[] = { }; MODULE_DEVICE_TABLE(of, arm_smmu_of_match); -static int arm_smmu_device_dt_probe(struct platform_device *pdev) +#ifdef CONFIG_ACPI +static int acpi_smmu_get_data(u32 model, struct arm_smmu_device *smmu) +{ + int ret = 0; + + switch (model) { + case ACPI_IORT_SMMU_V1: + case ACPI_IORT_SMMU_CORELINK_MMU400: + smmu->version = ARM_SMMU_V1; + smmu->model = GENERIC_SMMU; + break; + case ACPI_IORT_SMMU_V2: + smmu->version = ARM_SMMU_V2; + smmu->model = GENERIC_SMMU; + break; + case ACPI_IORT_SMMU_CORELINK_MMU500: + smmu->version = ARM_SMMU_V2; + smmu->model = ARM_MMU500; + break; + default: + ret = -ENODEV; + } + + return ret; +} + +static int arm_smmu_device_acpi_probe(struct platform_device *pdev, + struct arm_smmu_device *smmu) +{ + struct device *dev = smmu->dev; + struct acpi_iort_node *node = + *(struct acpi_iort_node **)dev_get_platdata(dev); + struct acpi_iort_smmu *iort_smmu; + int ret; + + /* Retrieve SMMU1/2 specific data */ + iort_smmu = (struct acpi_iort_smmu *)node->node_data; + + ret = acpi_smmu_get_data(iort_smmu->model, smmu); + if (ret < 0) + return ret; + + /* Ignore the configuration access interrupt */ + smmu->num_global_irqs = 1; + + if (iort_smmu->flags & ACPI_IORT_SMMU_COHERENT_WALK) + smmu->features |= ARM_SMMU_FEAT_COHERENT_WALK; + + return 0; +} +#else +static inline int arm_smmu_device_acpi_probe(struct platform_device *pdev, + struct arm_smmu_device *smmu) +{ + return -ENODEV; +} +#endif + +static int arm_smmu_device_dt_probe(struct platform_device *pdev, + struct arm_smmu_device *smmu) { const struct arm_smmu_match_data *data; - struct resource *res; - struct arm_smmu_device *smmu; struct device *dev = &pdev->dev; - int num_irqs, i, err; bool legacy_binding; + if (of_property_read_u32(dev->of_node, "#global-interrupts", + &smmu->num_global_irqs)) { + dev_err(dev, "missing #global-interrupts property\n"); + return -ENODEV; + } + + data = of_device_get_match_data(dev); + smmu->version = data->version; + smmu->model = data->model; + + parse_driver_options(smmu); + legacy_binding = of_find_property(dev->of_node, "mmu-masters", NULL); if (legacy_binding && !using_generic_binding) { if (!using_legacy_binding) @@ -1927,6 +2002,19 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev) return -ENODEV; } + if (of_dma_is_coherent(dev->of_node)) + smmu->features |= ARM_SMMU_FEAT_COHERENT_WALK; + + return 0; +} + +static int arm_smmu_device_probe(struct platform_device *pdev) +{ + struct resource *res; + struct arm_smmu_device *smmu; + struct device *dev = &pdev->dev; + 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"); @@ -1934,9 +2022,13 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev) } smmu->dev = dev; - data = of_device_get_match_data(dev); - smmu->version = data->version; - smmu->model = data->model; + if (dev->of_node) + err = arm_smmu_device_dt_probe(pdev, smmu); + else + err = arm_smmu_device_acpi_probe(pdev, smmu); + + if (err) + return err; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); smmu->base = devm_ioremap_resource(dev, res); @@ -1944,12 +2036,6 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev) 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++; @@ -1984,8 +2070,6 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev) if (err) return err; - parse_driver_options(smmu); - if (smmu->version == ARM_SMMU_V2 && smmu->num_context_banks != smmu->num_context_irqs) { dev_err(dev, @@ -2007,7 +2091,7 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev) } } - of_iommu_set_ops(dev->of_node, &arm_smmu_ops); + iommu_register_instance(dev->fwnode, &arm_smmu_ops); platform_set_drvdata(pdev, smmu); arm_smmu_device_reset(smmu); @@ -2047,7 +2131,7 @@ static struct platform_driver arm_smmu_driver = { .name = "arm-smmu", .of_match_table = of_match_ptr(arm_smmu_of_match), }, - .probe = arm_smmu_device_dt_probe, + .probe = arm_smmu_device_probe, .remove = arm_smmu_device_remove, }; @@ -2090,6 +2174,17 @@ IOMMU_OF_DECLARE(arm_mmu401, "arm,mmu-401", arm_smmu_of_init); IOMMU_OF_DECLARE(arm_mmu500, "arm,mmu-500", arm_smmu_of_init); IOMMU_OF_DECLARE(cavium_smmuv2, "cavium,smmu-v2", arm_smmu_of_init); +#ifdef CONFIG_ACPI +static int __init arm_smmu_acpi_init(struct acpi_table_header *table) +{ + if (iort_node_match(ACPI_IORT_NODE_SMMU)) + return arm_smmu_init(); + + return 0; +} +IORT_ACPI_DECLARE(arm_smmu, ACPI_SIG_IORT, arm_smmu_acpi_init); +#endif + 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/dma-iommu.c b/drivers/iommu/dma-iommu.c index c5ab8667e6f2..2db0d641cf45 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -432,13 +432,12 @@ int iommu_dma_mmap(struct page **pages, size_t size, struct vm_area_struct *vma) return ret; } -dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, int prot) +static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys, + size_t size, int prot) { dma_addr_t dma_addr; struct iommu_domain *domain = iommu_get_domain_for_dev(dev); struct iova_domain *iovad = cookie_iovad(domain); - phys_addr_t phys = page_to_phys(page) + offset; size_t iova_off = iova_offset(iovad, phys); size_t len = iova_align(iovad, size + iova_off); struct iova *iova = __alloc_iova(domain, len, dma_get_mask(dev)); @@ -454,6 +453,12 @@ dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page, return dma_addr + iova_off; } +dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, int prot) +{ + return __iommu_dma_map(dev, page_to_phys(page) + offset, size, prot); +} + void iommu_dma_unmap_page(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir, unsigned long attrs) { @@ -624,6 +629,19 @@ void iommu_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, __iommu_dma_unmap(iommu_get_domain_for_dev(dev), sg_dma_address(sg)); } +dma_addr_t iommu_dma_map_resource(struct device *dev, phys_addr_t phys, + size_t size, enum dma_data_direction dir, unsigned long attrs) +{ + return __iommu_dma_map(dev, phys, size, + dma_direction_to_prot(dir, false) | IOMMU_MMIO); +} + +void iommu_dma_unmap_resource(struct device *dev, dma_addr_t handle, + size_t size, enum dma_data_direction dir, unsigned long attrs) +{ + __iommu_dma_unmap(iommu_get_domain_for_dev(dev), handle); +} + int iommu_dma_supported(struct device *dev, u64 mask) { /* diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 30808e91b775..57ba0d3091ea 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -70,6 +70,36 @@ static short PG_ENT_SHIFT = -1; #define SYSMMU_PG_ENT_SHIFT 0 #define SYSMMU_V5_PG_ENT_SHIFT 4 +static const sysmmu_pte_t *LV1_PROT; +static const sysmmu_pte_t SYSMMU_LV1_PROT[] = { + ((0 << 15) | (0 << 10)), /* no access */ + ((1 << 15) | (1 << 10)), /* IOMMU_READ only */ + ((0 << 15) | (1 << 10)), /* IOMMU_WRITE not supported, use read/write */ + ((0 << 15) | (1 << 10)), /* IOMMU_READ | IOMMU_WRITE */ +}; +static const sysmmu_pte_t SYSMMU_V5_LV1_PROT[] = { + (0 << 4), /* no access */ + (1 << 4), /* IOMMU_READ only */ + (2 << 4), /* IOMMU_WRITE only */ + (3 << 4), /* IOMMU_READ | IOMMU_WRITE */ +}; + +static const sysmmu_pte_t *LV2_PROT; +static const sysmmu_pte_t SYSMMU_LV2_PROT[] = { + ((0 << 9) | (0 << 4)), /* no access */ + ((1 << 9) | (1 << 4)), /* IOMMU_READ only */ + ((0 << 9) | (1 << 4)), /* IOMMU_WRITE not supported, use read/write */ + ((0 << 9) | (1 << 4)), /* IOMMU_READ | IOMMU_WRITE */ +}; +static const sysmmu_pte_t SYSMMU_V5_LV2_PROT[] = { + (0 << 2), /* no access */ + (1 << 2), /* IOMMU_READ only */ + (2 << 2), /* IOMMU_WRITE only */ + (3 << 2), /* IOMMU_READ | IOMMU_WRITE */ +}; + +#define SYSMMU_SUPPORTED_PROT_BITS (IOMMU_READ | IOMMU_WRITE) + #define sect_to_phys(ent) (((phys_addr_t) ent) << PG_ENT_SHIFT) #define section_phys(sent) (sect_to_phys(*(sent)) & SECT_MASK) #define section_offs(iova) (iova & (SECT_SIZE - 1)) @@ -97,16 +127,17 @@ static u32 lv2ent_offset(sysmmu_iova_t iova) #define SPAGES_PER_LPAGE (LPAGE_SIZE / SPAGE_SIZE) #define lv2table_base(sent) (sect_to_phys(*(sent) & 0xFFFFFFC0)) -#define mk_lv1ent_sect(pa) ((pa >> PG_ENT_SHIFT) | 2) +#define mk_lv1ent_sect(pa, prot) ((pa >> PG_ENT_SHIFT) | LV1_PROT[prot] | 2) #define mk_lv1ent_page(pa) ((pa >> PG_ENT_SHIFT) | 1) -#define mk_lv2ent_lpage(pa) ((pa >> PG_ENT_SHIFT) | 1) -#define mk_lv2ent_spage(pa) ((pa >> PG_ENT_SHIFT) | 2) +#define mk_lv2ent_lpage(pa, prot) ((pa >> PG_ENT_SHIFT) | LV2_PROT[prot] | 1) +#define mk_lv2ent_spage(pa, prot) ((pa >> PG_ENT_SHIFT) | LV2_PROT[prot] | 2) #define CTRL_ENABLE 0x5 #define CTRL_BLOCK 0x7 #define CTRL_DISABLE 0x0 #define CFG_LRU 0x1 +#define CFG_EAP (1 << 2) #define CFG_QOS(n) ((n & 0xF) << 7) #define CFG_ACGEN (1 << 24) /* System MMU 3.3 only */ #define CFG_SYSSEL (1 << 22) /* System MMU 3.2 only */ @@ -206,6 +237,7 @@ static const struct sysmmu_fault_info sysmmu_v5_faults[] = { struct exynos_iommu_owner { struct list_head controllers; /* list of sysmmu_drvdata.owner_node */ struct iommu_domain *domain; /* domain this device is attached */ + struct mutex rpm_lock; /* for runtime pm of all sysmmus */ }; /* @@ -237,8 +269,8 @@ struct sysmmu_drvdata { struct clk *aclk; /* SYSMMU's aclk clock */ struct clk *pclk; /* SYSMMU's pclk clock */ struct clk *clk_master; /* master's device clock */ - int activations; /* number of calls to sysmmu_enable */ spinlock_t lock; /* lock for modyfying state */ + bool active; /* current status */ struct exynos_iommu_domain *domain; /* domain we belong to */ struct list_head domain_node; /* node for domain clients list */ struct list_head owner_node; /* node for owner controllers list */ @@ -251,25 +283,6 @@ static struct exynos_iommu_domain *to_exynos_domain(struct iommu_domain *dom) return container_of(dom, struct exynos_iommu_domain, domain); } -static bool set_sysmmu_active(struct sysmmu_drvdata *data) -{ - /* return true if the System MMU was not active previously - and it needs to be initialized */ - return ++data->activations == 1; -} - -static bool set_sysmmu_inactive(struct sysmmu_drvdata *data) -{ - /* return true if the System MMU is needed to be disabled */ - BUG_ON(data->activations < 1); - return --data->activations == 0; -} - -static bool is_sysmmu_active(struct sysmmu_drvdata *data) -{ - return data->activations > 0; -} - static void sysmmu_unblock(struct sysmmu_drvdata *data) { writel(CTRL_ENABLE, data->sfrbase + REG_MMU_CTRL); @@ -388,7 +401,7 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id) unsigned short reg_status, reg_clear; int ret = -ENOSYS; - WARN_ON(!is_sysmmu_active(data)); + WARN_ON(!data->active); if (MMU_MAJ_VER(data->version) < 5) { reg_status = REG_INT_STATUS; @@ -434,40 +447,19 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id) return IRQ_HANDLED; } -static void __sysmmu_disable_nocount(struct sysmmu_drvdata *data) +static void __sysmmu_disable(struct sysmmu_drvdata *data) { + unsigned long flags; + clk_enable(data->clk_master); + spin_lock_irqsave(&data->lock, flags); writel(CTRL_DISABLE, data->sfrbase + REG_MMU_CTRL); writel(0, data->sfrbase + REG_MMU_CFG); - - __sysmmu_disable_clocks(data); -} - -static bool __sysmmu_disable(struct sysmmu_drvdata *data) -{ - bool disabled; - unsigned long flags; - - spin_lock_irqsave(&data->lock, flags); - - disabled = set_sysmmu_inactive(data); - - 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); - } - + data->active = false; spin_unlock_irqrestore(&data->lock, flags); - return disabled; + __sysmmu_disable_clocks(data); } static void __sysmmu_init_config(struct sysmmu_drvdata *data) @@ -481,20 +473,24 @@ static void __sysmmu_init_config(struct sysmmu_drvdata *data) else cfg = CFG_QOS(15) | CFG_FLPDCACHE | CFG_ACGEN; + cfg |= CFG_EAP; /* enable access protection bits check */ + writel(cfg, data->sfrbase + REG_MMU_CFG); } -static void __sysmmu_enable_nocount(struct sysmmu_drvdata *data) +static void __sysmmu_enable(struct sysmmu_drvdata *data) { + unsigned long flags; + __sysmmu_enable_clocks(data); + spin_lock_irqsave(&data->lock, flags); writel(CTRL_BLOCK, data->sfrbase + REG_MMU_CTRL); - __sysmmu_init_config(data); - __sysmmu_set_ptbase(data, data->pgtable); - writel(CTRL_ENABLE, data->sfrbase + REG_MMU_CTRL); + data->active = true; + spin_unlock_irqrestore(&data->lock, flags); /* * SYSMMU driver keeps master's clock enabled only for the short @@ -505,48 +501,18 @@ static void __sysmmu_enable_nocount(struct sysmmu_drvdata *data) clk_disable(data->clk_master); } -static int __sysmmu_enable(struct sysmmu_drvdata *data, phys_addr_t pgtable, - struct exynos_iommu_domain *domain) -{ - int ret = 0; - unsigned long flags; - - spin_lock_irqsave(&data->lock, flags); - if (set_sysmmu_active(data)) { - data->pgtable = pgtable; - data->domain = domain; - - __sysmmu_enable_nocount(data); - - dev_dbg(data->sysmmu, "Enabled\n"); - } else { - ret = (pgtable == data->pgtable) ? 1 : -EBUSY; - - dev_dbg(data->sysmmu, "already enabled\n"); - } - - if (WARN_ON(ret < 0)) - set_sysmmu_inactive(data); /* decrement count */ - - spin_unlock_irqrestore(&data->lock, flags); - - return ret; -} - static void sysmmu_tlb_invalidate_flpdcache(struct sysmmu_drvdata *data, sysmmu_iova_t iova) { unsigned long flags; - spin_lock_irqsave(&data->lock, flags); - if (is_sysmmu_active(data) && data->version >= MAKE_MMU_VER(3, 3)) { + if (data->active && data->version >= MAKE_MMU_VER(3, 3)) { clk_enable(data->clk_master); __sysmmu_tlb_invalidate_entry(data, iova, 1); clk_disable(data->clk_master); } spin_unlock_irqrestore(&data->lock, flags); - } static void sysmmu_tlb_invalidate_entry(struct sysmmu_drvdata *data, @@ -555,7 +521,7 @@ static void sysmmu_tlb_invalidate_entry(struct sysmmu_drvdata *data, unsigned long flags; spin_lock_irqsave(&data->lock, flags); - if (is_sysmmu_active(data)) { + if (data->active) { unsigned int num_inv = 1; clk_enable(data->clk_master); @@ -578,9 +544,6 @@ static void sysmmu_tlb_invalidate_entry(struct sysmmu_drvdata *data, sysmmu_unblock(data); } clk_disable(data->clk_master); - } else { - dev_dbg(data->master, - "disabled. Skipping TLB invalidation @ %#x\n", iova); } spin_unlock_irqrestore(&data->lock, flags); } @@ -652,10 +615,15 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev) __sysmmu_get_version(data); if (PG_ENT_SHIFT < 0) { - if (MMU_MAJ_VER(data->version) < 5) + if (MMU_MAJ_VER(data->version) < 5) { PG_ENT_SHIFT = SYSMMU_PG_ENT_SHIFT; - else + LV1_PROT = SYSMMU_LV1_PROT; + LV2_PROT = SYSMMU_LV2_PROT; + } else { PG_ENT_SHIFT = SYSMMU_V5_PG_ENT_SHIFT; + LV1_PROT = SYSMMU_V5_LV1_PROT; + LV2_PROT = SYSMMU_V5_LV2_PROT; + } } pm_runtime_enable(dev); @@ -665,34 +633,46 @@ static int __init exynos_sysmmu_probe(struct platform_device *pdev) return 0; } -#ifdef CONFIG_PM_SLEEP -static int exynos_sysmmu_suspend(struct device *dev) +static int __maybe_unused exynos_sysmmu_suspend(struct device *dev) { struct sysmmu_drvdata *data = dev_get_drvdata(dev); + struct device *master = data->master; + + if (master) { + struct exynos_iommu_owner *owner = master->archdata.iommu; - dev_dbg(dev, "suspend\n"); - if (is_sysmmu_active(data)) { - __sysmmu_disable_nocount(data); - pm_runtime_put(dev); + mutex_lock(&owner->rpm_lock); + if (data->domain) { + dev_dbg(data->sysmmu, "saving state\n"); + __sysmmu_disable(data); + } + mutex_unlock(&owner->rpm_lock); } return 0; } -static int exynos_sysmmu_resume(struct device *dev) +static int __maybe_unused exynos_sysmmu_resume(struct device *dev) { struct sysmmu_drvdata *data = dev_get_drvdata(dev); + struct device *master = data->master; + + if (master) { + struct exynos_iommu_owner *owner = master->archdata.iommu; - dev_dbg(dev, "resume\n"); - if (is_sysmmu_active(data)) { - pm_runtime_get_sync(dev); - __sysmmu_enable_nocount(data); + mutex_lock(&owner->rpm_lock); + if (data->domain) { + dev_dbg(data->sysmmu, "restoring state\n"); + __sysmmu_enable(data); + } + mutex_unlock(&owner->rpm_lock); } return 0; } -#endif static const struct dev_pm_ops sysmmu_pm_ops = { - SET_LATE_SYSTEM_SLEEP_PM_OPS(exynos_sysmmu_suspend, exynos_sysmmu_resume) + SET_RUNTIME_PM_OPS(exynos_sysmmu_suspend, exynos_sysmmu_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) }; static const struct of_device_id sysmmu_of_match[] __initconst = { @@ -796,9 +776,12 @@ static void exynos_iommu_domain_free(struct iommu_domain *iommu_domain) spin_lock_irqsave(&domain->lock, flags); list_for_each_entry_safe(data, next, &domain->clients, domain_node) { - if (__sysmmu_disable(data)) - data->master = NULL; + spin_lock(&data->lock); + __sysmmu_disable(data); + data->pgtable = 0; + data->domain = NULL; list_del_init(&data->domain_node); + spin_unlock(&data->lock); } spin_unlock_irqrestore(&domain->lock, flags); @@ -832,31 +815,34 @@ static void exynos_iommu_detach_device(struct iommu_domain *iommu_domain, phys_addr_t pagetable = virt_to_phys(domain->pgtable); struct sysmmu_drvdata *data, *next; unsigned long flags; - bool found = false; if (!has_sysmmu(dev) || owner->domain != iommu_domain) return; + mutex_lock(&owner->rpm_lock); + + list_for_each_entry(data, &owner->controllers, owner_node) { + pm_runtime_get_noresume(data->sysmmu); + if (pm_runtime_active(data->sysmmu)) + __sysmmu_disable(data); + pm_runtime_put(data->sysmmu); + } + spin_lock_irqsave(&domain->lock, flags); list_for_each_entry_safe(data, next, &domain->clients, domain_node) { - if (data->master == dev) { - if (__sysmmu_disable(data)) { - data->master = NULL; - list_del_init(&data->domain_node); - } - pm_runtime_put(data->sysmmu); - found = true; - } + spin_lock(&data->lock); + data->pgtable = 0; + data->domain = NULL; + list_del_init(&data->domain_node); + spin_unlock(&data->lock); } + owner->domain = NULL; spin_unlock_irqrestore(&domain->lock, flags); - owner->domain = NULL; + mutex_unlock(&owner->rpm_lock); - if (found) - dev_dbg(dev, "%s: Detached IOMMU with pgtable %pa\n", - __func__, &pagetable); - else - dev_err(dev, "%s: No IOMMU is attached\n", __func__); + dev_dbg(dev, "%s: Detached IOMMU with pgtable %pa\n", __func__, + &pagetable); } static int exynos_iommu_attach_device(struct iommu_domain *iommu_domain, @@ -867,7 +853,6 @@ static int exynos_iommu_attach_device(struct iommu_domain *iommu_domain, struct sysmmu_drvdata *data; phys_addr_t pagetable = virt_to_phys(domain->pgtable); unsigned long flags; - int ret = -ENODEV; if (!has_sysmmu(dev)) return -ENODEV; @@ -875,29 +860,32 @@ static int exynos_iommu_attach_device(struct iommu_domain *iommu_domain, if (owner->domain) exynos_iommu_detach_device(owner->domain, dev); + mutex_lock(&owner->rpm_lock); + + spin_lock_irqsave(&domain->lock, flags); list_for_each_entry(data, &owner->controllers, owner_node) { - pm_runtime_get_sync(data->sysmmu); - ret = __sysmmu_enable(data, pagetable, domain); - if (ret >= 0) { - data->master = dev; - - spin_lock_irqsave(&domain->lock, flags); - list_add_tail(&data->domain_node, &domain->clients); - spin_unlock_irqrestore(&domain->lock, flags); - } + spin_lock(&data->lock); + data->pgtable = pagetable; + data->domain = domain; + list_add_tail(&data->domain_node, &domain->clients); + spin_unlock(&data->lock); } + owner->domain = iommu_domain; + spin_unlock_irqrestore(&domain->lock, flags); - if (ret < 0) { - dev_err(dev, "%s: Failed to attach IOMMU with pgtable %pa\n", - __func__, &pagetable); - return ret; + list_for_each_entry(data, &owner->controllers, owner_node) { + pm_runtime_get_noresume(data->sysmmu); + if (pm_runtime_active(data->sysmmu)) + __sysmmu_enable(data); + pm_runtime_put(data->sysmmu); } - owner->domain = iommu_domain; - dev_dbg(dev, "%s: Attached IOMMU with pgtable %pa %s\n", - __func__, &pagetable, (ret == 0) ? "" : ", again"); + mutex_unlock(&owner->rpm_lock); - return ret; + dev_dbg(dev, "%s: Attached IOMMU with pgtable %pa\n", __func__, + &pagetable); + + return 0; } static sysmmu_pte_t *alloc_lv2entry(struct exynos_iommu_domain *domain, @@ -954,7 +942,7 @@ static sysmmu_pte_t *alloc_lv2entry(struct exynos_iommu_domain *domain, static int lv1set_section(struct exynos_iommu_domain *domain, sysmmu_pte_t *sent, sysmmu_iova_t iova, - phys_addr_t paddr, short *pgcnt) + phys_addr_t paddr, int prot, short *pgcnt) { if (lv1ent_section(sent)) { WARN(1, "Trying mapping on 1MiB@%#08x that is mapped", @@ -973,7 +961,7 @@ static int lv1set_section(struct exynos_iommu_domain *domain, *pgcnt = 0; } - update_pte(sent, mk_lv1ent_sect(paddr)); + update_pte(sent, mk_lv1ent_sect(paddr, prot)); spin_lock(&domain->lock); if (lv1ent_page_zero(sent)) { @@ -991,13 +979,13 @@ static int lv1set_section(struct exynos_iommu_domain *domain, } static int lv2set_page(sysmmu_pte_t *pent, phys_addr_t paddr, size_t size, - short *pgcnt) + int prot, short *pgcnt) { if (size == SPAGE_SIZE) { if (WARN_ON(!lv2ent_fault(pent))) return -EADDRINUSE; - update_pte(pent, mk_lv2ent_spage(paddr)); + update_pte(pent, mk_lv2ent_spage(paddr, prot)); *pgcnt -= 1; } else { /* size == LPAGE_SIZE */ int i; @@ -1013,7 +1001,7 @@ static int lv2set_page(sysmmu_pte_t *pent, phys_addr_t paddr, size_t size, return -EADDRINUSE; } - *pent = mk_lv2ent_lpage(paddr); + *pent = mk_lv2ent_lpage(paddr, prot); } dma_sync_single_for_device(dma_dev, pent_base, sizeof(*pent) * SPAGES_PER_LPAGE, @@ -1061,13 +1049,14 @@ static int exynos_iommu_map(struct iommu_domain *iommu_domain, int ret = -ENOMEM; BUG_ON(domain->pgtable == NULL); + prot &= SYSMMU_SUPPORTED_PROT_BITS; spin_lock_irqsave(&domain->pgtablelock, flags); entry = section_entry(domain->pgtable, iova); if (size == SECT_SIZE) { - ret = lv1set_section(domain, entry, iova, paddr, + ret = lv1set_section(domain, entry, iova, paddr, prot, &domain->lv2entcnt[lv1ent_offset(iova)]); } else { sysmmu_pte_t *pent; @@ -1078,7 +1067,7 @@ static int exynos_iommu_map(struct iommu_domain *iommu_domain, if (IS_ERR(pent)) ret = PTR_ERR(pent); else - ret = lv2set_page(pent, paddr, size, + ret = lv2set_page(pent, paddr, size, prot, &domain->lv2entcnt[lv1ent_offset(iova)]); } @@ -1268,10 +1257,20 @@ static int exynos_iommu_of_xlate(struct device *dev, return -ENOMEM; INIT_LIST_HEAD(&owner->controllers); + mutex_init(&owner->rpm_lock); dev->archdata.iommu = owner; } list_add_tail(&data->owner_node, &owner->controllers); + data->master = dev; + + /* + * SYSMMU will be runtime activated via device link (dependency) to its + * master device, so there are no direct calls to pm_runtime_get/put + * in this driver. + */ + device_link_add(dev, data->sysmmu, DL_FLAG_PM_RUNTIME); + return 0; } diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c index f50e51c1a9c8..0769276c0537 100644 --- a/drivers/iommu/io-pgtable-arm-v7s.c +++ b/drivers/iommu/io-pgtable-arm-v7s.c @@ -793,8 +793,7 @@ static int __init arm_v7s_do_selftests(void) * Distinct mappings of different granule sizes. */ iova = 0; - i = find_first_bit(&cfg.pgsize_bitmap, BITS_PER_LONG); - while (i != BITS_PER_LONG) { + for_each_set_bit(i, &cfg.pgsize_bitmap, BITS_PER_LONG) { size = 1UL << i; if (ops->map(ops, iova, iova, size, IOMMU_READ | IOMMU_WRITE | @@ -811,8 +810,6 @@ static int __init arm_v7s_do_selftests(void) return __FAIL(ops); iova += SZ_16M; - i++; - i = find_next_bit(&cfg.pgsize_bitmap, BITS_PER_LONG, i); loopnr++; } diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index f5c90e1366ce..a40ce3406fef 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -916,7 +916,7 @@ static void dummy_tlb_sync(void *cookie) WARN_ON(cookie != cfg_cookie); } -static struct iommu_gather_ops dummy_tlb_ops __initdata = { +static const struct iommu_gather_ops dummy_tlb_ops __initconst = { .tlb_flush_all = dummy_tlb_flush_all, .tlb_add_flush = dummy_tlb_add_flush, .tlb_sync = dummy_tlb_sync, @@ -980,8 +980,7 @@ static int __init arm_lpae_run_tests(struct io_pgtable_cfg *cfg) * Distinct mappings of different granule sizes. */ iova = 0; - j = find_first_bit(&cfg->pgsize_bitmap, BITS_PER_LONG); - while (j != BITS_PER_LONG) { + for_each_set_bit(j, &cfg->pgsize_bitmap, BITS_PER_LONG) { size = 1UL << j; if (ops->map(ops, iova, iova, size, IOMMU_READ | @@ -999,8 +998,6 @@ static int __init arm_lpae_run_tests(struct io_pgtable_cfg *cfg) return __FAIL(ops, i); iova += SZ_1G; - j++; - j = find_next_bit(&cfg->pgsize_bitmap, BITS_PER_LONG, j); } /* Partial unmap */ diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 9a2f1960873b..dbe7f653bb7c 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -552,6 +552,19 @@ struct iommu_group *iommu_group_get(struct device *dev) EXPORT_SYMBOL_GPL(iommu_group_get); /** + * iommu_group_ref_get - Increment reference on a group + * @group: the group to use, must not be NULL + * + * This function is called by iommu drivers to take additional references on an + * existing group. Returns the given group for convenience. + */ +struct iommu_group *iommu_group_ref_get(struct iommu_group *group) +{ + kobject_get(group->devices_kobj); + return group; +} + +/** * iommu_group_put - Decrement group reference * @group: the group to use * @@ -1615,6 +1628,46 @@ out: return ret; } +struct iommu_instance { + struct list_head list; + struct fwnode_handle *fwnode; + const struct iommu_ops *ops; +}; +static LIST_HEAD(iommu_instance_list); +static DEFINE_SPINLOCK(iommu_instance_lock); + +void iommu_register_instance(struct fwnode_handle *fwnode, + const struct iommu_ops *ops) +{ + struct iommu_instance *iommu = kzalloc(sizeof(*iommu), GFP_KERNEL); + + if (WARN_ON(!iommu)) + return; + + of_node_get(to_of_node(fwnode)); + INIT_LIST_HEAD(&iommu->list); + iommu->fwnode = fwnode; + iommu->ops = ops; + spin_lock(&iommu_instance_lock); + list_add_tail(&iommu->list, &iommu_instance_list); + spin_unlock(&iommu_instance_lock); +} + +const struct iommu_ops *iommu_get_instance(struct fwnode_handle *fwnode) +{ + struct iommu_instance *instance; + const struct iommu_ops *ops = NULL; + + spin_lock(&iommu_instance_lock); + list_for_each_entry(instance, &iommu_instance_list, list) + if (instance->fwnode == fwnode) { + ops = instance->ops; + break; + } + spin_unlock(&iommu_instance_lock); + return ops; +} + int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode, const struct iommu_ops *ops) { diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c index e23001bfcfee..080beca0197d 100644 --- a/drivers/iommu/iova.c +++ b/drivers/iommu/iova.c @@ -56,7 +56,7 @@ EXPORT_SYMBOL_GPL(init_iova_domain); static struct rb_node * __get_cached_rbnode(struct iova_domain *iovad, unsigned long *limit_pfn) { - if ((*limit_pfn != iovad->dma_32bit_pfn) || + if ((*limit_pfn > iovad->dma_32bit_pfn) || (iovad->cached32_node == NULL)) return rb_last(&iovad->rbroot); else { diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index b12c12d74c33..1479c76ece9e 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -195,14 +195,14 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id) static void mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev, bool enable) { - struct mtk_iommu_client_priv *head, *cur, *next; struct mtk_smi_larb_iommu *larb_mmu; unsigned int larbid, portid; + struct iommu_fwspec *fwspec = dev->iommu_fwspec; + int i; - head = dev->archdata.iommu; - list_for_each_entry_safe(cur, next, &head->client, client) { - larbid = MTK_M4U_TO_LARB(cur->mtk_m4u_id); - portid = MTK_M4U_TO_PORT(cur->mtk_m4u_id); + for (i = 0; i < fwspec->num_ids; ++i) { + larbid = MTK_M4U_TO_LARB(fwspec->ids[i]); + portid = MTK_M4U_TO_PORT(fwspec->ids[i]); larb_mmu = &data->smi_imu.larb_imu[larbid]; dev_dbg(dev, "%s iommu port: %d\n", @@ -282,14 +282,12 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, struct device *dev) { struct mtk_iommu_domain *dom = to_mtk_domain(domain); - struct mtk_iommu_client_priv *priv = dev->archdata.iommu; - struct mtk_iommu_data *data; + struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; int ret; - if (!priv) + if (!data) return -ENODEV; - data = dev_get_drvdata(priv->m4udev); if (!data->m4u_dom) { data->m4u_dom = dom; ret = mtk_iommu_domain_finalise(data); @@ -310,13 +308,11 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, static void mtk_iommu_detach_device(struct iommu_domain *domain, struct device *dev) { - struct mtk_iommu_client_priv *priv = dev->archdata.iommu; - struct mtk_iommu_data *data; + struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; - if (!priv) + if (!data) return; - data = dev_get_drvdata(priv->m4udev); mtk_iommu_config(data, dev, false); } @@ -366,8 +362,8 @@ static int mtk_iommu_add_device(struct device *dev) { struct iommu_group *group; - if (!dev->archdata.iommu) /* Not a iommu client device */ - return -ENODEV; + if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops) + return -ENODEV; /* Not a iommu client device */ group = iommu_group_get_for_dev(dev); if (IS_ERR(group)) @@ -379,44 +375,33 @@ static int mtk_iommu_add_device(struct device *dev) static void mtk_iommu_remove_device(struct device *dev) { - struct mtk_iommu_client_priv *head, *cur, *next; - - head = dev->archdata.iommu; - if (!head) + if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops) return; - list_for_each_entry_safe(cur, next, &head->client, client) { - list_del(&cur->client); - kfree(cur); - } - kfree(head); - dev->archdata.iommu = NULL; - iommu_group_remove_device(dev); + iommu_fwspec_free(dev); } static struct iommu_group *mtk_iommu_device_group(struct device *dev) { - struct mtk_iommu_data *data; - struct mtk_iommu_client_priv *priv; + struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; - priv = dev->archdata.iommu; - if (!priv) + if (!data) return ERR_PTR(-ENODEV); /* All the client devices are in the same m4u iommu-group */ - data = dev_get_drvdata(priv->m4udev); if (!data->m4u_group) { data->m4u_group = iommu_group_alloc(); if (IS_ERR(data->m4u_group)) dev_err(dev, "Failed to allocate M4U IOMMU group\n"); + } else { + iommu_group_ref_get(data->m4u_group); } return data->m4u_group; } static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args) { - struct mtk_iommu_client_priv *head, *priv, *next; struct platform_device *m4updev; if (args->args_count != 1) { @@ -425,38 +410,16 @@ static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args) return -EINVAL; } - if (!dev->archdata.iommu) { + if (!dev->iommu_fwspec->iommu_priv) { /* Get the m4u device */ m4updev = of_find_device_by_node(args->np); if (WARN_ON(!m4updev)) return -EINVAL; - head = kzalloc(sizeof(*head), GFP_KERNEL); - if (!head) - return -ENOMEM; - - dev->archdata.iommu = head; - INIT_LIST_HEAD(&head->client); - head->m4udev = &m4updev->dev; - } else { - head = dev->archdata.iommu; + dev->iommu_fwspec->iommu_priv = platform_get_drvdata(m4updev); } - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (!priv) - goto err_free_mem; - - priv->mtk_m4u_id = args->args[0]; - list_add_tail(&priv->client, &head->client); - - return 0; - -err_free_mem: - list_for_each_entry_safe(priv, next, &head->client, client) - kfree(priv); - kfree(head); - dev->archdata.iommu = NULL; - return -ENOMEM; + return iommu_fwspec_add_ids(dev, args->args, 1); } static struct iommu_ops mtk_iommu_ops = { @@ -583,17 +546,19 @@ static int mtk_iommu_probe(struct platform_device *pdev) continue; plarbdev = of_find_device_by_node(larbnode); - of_node_put(larbnode); if (!plarbdev) { plarbdev = of_platform_device_create( larbnode, NULL, platform_bus_type.dev_root); - if (!plarbdev) + if (!plarbdev) { + of_node_put(larbnode); return -EPROBE_DEFER; + } } data->smi_imu.larb_imu[i].dev = &plarbdev->dev; - component_match_add(dev, &match, compare_of, larbnode); + component_match_add_release(dev, &match, release_of, + compare_of, larbnode); } platform_set_drvdata(pdev, data); diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h index 3dab13b4a211..50177f738e4e 100644 --- a/drivers/iommu/mtk_iommu.h +++ b/drivers/iommu/mtk_iommu.h @@ -34,12 +34,6 @@ struct mtk_iommu_suspend_reg { u32 int_main_control; }; -struct mtk_iommu_client_priv { - struct list_head client; - unsigned int mtk_m4u_id; - struct device *m4udev; -}; - struct mtk_iommu_domain; struct mtk_iommu_data { @@ -60,6 +54,11 @@ static inline int compare_of(struct device *dev, void *data) return dev->of_node == data; } +static inline void release_of(struct device *dev, void *data) +{ + of_node_put(data); +} + static inline int mtk_iommu_bind(struct device *dev) { struct mtk_iommu_data *data = dev_get_drvdata(dev); diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index b8aeb0768483..19e010083408 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -204,14 +204,14 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id) static void mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev, bool enable) { - struct mtk_iommu_client_priv *head, *cur, *next; struct mtk_smi_larb_iommu *larb_mmu; unsigned int larbid, portid; + struct iommu_fwspec *fwspec = dev->iommu_fwspec; + int i; - head = dev->archdata.iommu; - list_for_each_entry_safe(cur, next, &head->client, client) { - larbid = mt2701_m4u_to_larb(cur->mtk_m4u_id); - portid = mt2701_m4u_to_port(cur->mtk_m4u_id); + for (i = 0; i < fwspec->num_ids; ++i) { + larbid = mt2701_m4u_to_larb(fwspec->ids[i]); + portid = mt2701_m4u_to_port(fwspec->ids[i]); larb_mmu = &data->smi_imu.larb_imu[larbid]; dev_dbg(dev, "%s iommu port: %d\n", @@ -271,14 +271,12 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, struct device *dev) { struct mtk_iommu_domain *dom = to_mtk_domain(domain); - struct mtk_iommu_client_priv *priv = dev->archdata.iommu; - struct mtk_iommu_data *data; + struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; int ret; - if (!priv) + if (!data) return -ENODEV; - data = dev_get_drvdata(priv->m4udev); if (!data->m4u_dom) { data->m4u_dom = dom; ret = mtk_iommu_domain_finalise(data); @@ -295,13 +293,11 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, static void mtk_iommu_detach_device(struct iommu_domain *domain, struct device *dev) { - struct mtk_iommu_client_priv *priv = dev->archdata.iommu; - struct mtk_iommu_data *data; + struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; - if (!priv) + if (!data) return; - data = dev_get_drvdata(priv->m4udev); mtk_iommu_config(data, dev, false); } @@ -366,6 +362,8 @@ static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain, return pa; } +static struct iommu_ops mtk_iommu_ops; + /* * MTK generation one iommu HW only support one iommu domain, and all the client * sharing the same iova address space. @@ -373,7 +371,7 @@ static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain, static int mtk_iommu_create_mapping(struct device *dev, struct of_phandle_args *args) { - struct mtk_iommu_client_priv *head, *priv, *next; + struct mtk_iommu_data *data; struct platform_device *m4updev; struct dma_iommu_mapping *mtk_mapping; struct device *m4udev; @@ -385,41 +383,37 @@ static int mtk_iommu_create_mapping(struct device *dev, return -EINVAL; } - if (!dev->archdata.iommu) { + if (!dev->iommu_fwspec) { + ret = iommu_fwspec_init(dev, &args->np->fwnode, &mtk_iommu_ops); + if (ret) + return ret; + } else if (dev->iommu_fwspec->ops != &mtk_iommu_ops) { + return -EINVAL; + } + + if (!dev->iommu_fwspec->iommu_priv) { /* Get the m4u device */ m4updev = of_find_device_by_node(args->np); if (WARN_ON(!m4updev)) return -EINVAL; - head = kzalloc(sizeof(*head), GFP_KERNEL); - if (!head) - return -ENOMEM; - - dev->archdata.iommu = head; - INIT_LIST_HEAD(&head->client); - head->m4udev = &m4updev->dev; - } else { - head = dev->archdata.iommu; + dev->iommu_fwspec->iommu_priv = platform_get_drvdata(m4updev); } - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (!priv) { - ret = -ENOMEM; - goto err_free_mem; - } - priv->mtk_m4u_id = args->args[0]; - list_add_tail(&priv->client, &head->client); + ret = iommu_fwspec_add_ids(dev, args->args, 1); + if (ret) + return ret; - m4udev = head->m4udev; + data = dev->iommu_fwspec->iommu_priv; + m4udev = data->dev; mtk_mapping = m4udev->archdata.iommu; if (!mtk_mapping) { /* MTK iommu support 4GB iova address space. */ mtk_mapping = arm_iommu_create_mapping(&platform_bus_type, 0, 1ULL << 32); - if (IS_ERR(mtk_mapping)) { - ret = PTR_ERR(mtk_mapping); - goto err_free_mem; - } + if (IS_ERR(mtk_mapping)) + return PTR_ERR(mtk_mapping); + m4udev->archdata.iommu = mtk_mapping; } @@ -432,11 +426,6 @@ static int mtk_iommu_create_mapping(struct device *dev, err_release_mapping: arm_iommu_release_mapping(mtk_mapping); m4udev->archdata.iommu = NULL; -err_free_mem: - list_for_each_entry_safe(priv, next, &head->client, client) - kfree(priv); - kfree(head); - dev->archdata.iommu = NULL; return ret; } @@ -458,8 +447,8 @@ static int mtk_iommu_add_device(struct device *dev) of_node_put(iommu_spec.np); } - if (!dev->archdata.iommu) /* Not a iommu client device */ - return -ENODEV; + if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops) + return -ENODEV; /* Not a iommu client device */ group = iommu_group_get_for_dev(dev); if (IS_ERR(group)) @@ -471,37 +460,27 @@ static int mtk_iommu_add_device(struct device *dev) static void mtk_iommu_remove_device(struct device *dev) { - struct mtk_iommu_client_priv *head, *cur, *next; - - head = dev->archdata.iommu; - if (!head) + if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops) return; - list_for_each_entry_safe(cur, next, &head->client, client) { - list_del(&cur->client); - kfree(cur); - } - kfree(head); - dev->archdata.iommu = NULL; - iommu_group_remove_device(dev); + iommu_fwspec_free(dev); } static struct iommu_group *mtk_iommu_device_group(struct device *dev) { - struct mtk_iommu_data *data; - struct mtk_iommu_client_priv *priv; + struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; - priv = dev->archdata.iommu; - if (!priv) + if (!data) return ERR_PTR(-ENODEV); /* All the client devices are in the same m4u iommu-group */ - data = dev_get_drvdata(priv->m4udev); if (!data->m4u_group) { data->m4u_group = iommu_group_alloc(); if (IS_ERR(data->m4u_group)) dev_err(dev, "Failed to allocate M4U IOMMU group\n"); + } else { + iommu_group_ref_get(data->m4u_group); } return data->m4u_group; } @@ -624,17 +603,19 @@ static int mtk_iommu_probe(struct platform_device *pdev) continue; plarbdev = of_find_device_by_node(larb_spec.np); - of_node_put(larb_spec.np); if (!plarbdev) { plarbdev = of_platform_device_create( larb_spec.np, NULL, platform_bus_type.dev_root); - if (!plarbdev) + if (!plarbdev) { + of_node_put(larb_spec.np); return -EPROBE_DEFER; + } } data->smi_imu.larb_imu[larb_nr].dev = &plarbdev->dev; - component_match_add(dev, &match, compare_of, larb_spec.np); + component_match_add_release(dev, &match, release_of, + compare_of, larb_spec.np); larb_nr++; } diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index 5b82862f571f..0f57ddc4ecc2 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c @@ -96,45 +96,6 @@ int of_get_dma_window(struct device_node *dn, const char *prefix, int index, } EXPORT_SYMBOL_GPL(of_get_dma_window); -struct of_iommu_node { - struct list_head list; - struct device_node *np; - const struct iommu_ops *ops; -}; -static LIST_HEAD(of_iommu_list); -static DEFINE_SPINLOCK(of_iommu_lock); - -void of_iommu_set_ops(struct device_node *np, const struct iommu_ops *ops) -{ - struct of_iommu_node *iommu = kzalloc(sizeof(*iommu), GFP_KERNEL); - - if (WARN_ON(!iommu)) - return; - - of_node_get(np); - INIT_LIST_HEAD(&iommu->list); - iommu->np = np; - iommu->ops = ops; - spin_lock(&of_iommu_lock); - list_add_tail(&iommu->list, &of_iommu_list); - spin_unlock(&of_iommu_lock); -} - -const struct iommu_ops *of_iommu_get_ops(struct device_node *np) -{ - struct of_iommu_node *node; - const struct iommu_ops *ops = NULL; - - spin_lock(&of_iommu_lock); - list_for_each_entry(node, &of_iommu_list, list) - if (node->np == np) { - ops = node->ops; - break; - } - spin_unlock(&of_iommu_lock); - return ops; -} - static int __get_pci_rid(struct pci_dev *pdev, u16 alias, void *data) { struct of_phandle_args *iommu_spec = data; diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c index 3b44b1d82f3b..179e636a4d91 100644 --- a/drivers/iommu/s390-iommu.c +++ b/drivers/iommu/s390-iommu.c @@ -8,7 +8,6 @@ #include <linux/pci.h> #include <linux/iommu.h> #include <linux/iommu-helper.h> -#include <linux/pci.h> #include <linux/sizes.h> #include <asm/pci_dma.h> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 104c46d53121..ae23e6d21e1b 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1764,8 +1764,7 @@ static void pci_dma_configure(struct pci_dev *dev) if (attr == DEV_DMA_NOT_SUPPORTED) dev_warn(&dev->dev, "DMA not supported.\n"); else - arch_setup_dma_ops(&dev->dev, 0, 0, NULL, - attr == DEV_DMA_COHERENT); + acpi_dma_configure(&dev->dev, attr); } pci_put_host_bridge_device(bridge); diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index c1a524de67c5..4242c31ffaee 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -573,6 +573,8 @@ struct acpi_pci_root { bool acpi_dma_supported(struct acpi_device *adev); enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev); +void acpi_dma_configure(struct device *dev, enum dev_dma_attr attr); +void acpi_dma_deconfigure(struct device *dev); struct acpi_device *acpi_find_child_device(struct acpi_device *parent, u64 address, bool check_children); diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 31e1d639abed..9e3aa34341f4 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -566,6 +566,7 @@ IRQCHIP_OF_MATCH_TABLE() \ ACPI_PROBE_TABLE(irqchip) \ ACPI_PROBE_TABLE(clksrc) \ + ACPI_PROBE_TABLE(iort) \ EARLYCON_TABLE() #define INIT_TEXT \ diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 43b28f04a1f5..d5f017448a89 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -56,6 +56,27 @@ static inline acpi_handle acpi_device_handle(struct acpi_device *adev) acpi_fwnode_handle(adev) : NULL) #define ACPI_HANDLE(dev) acpi_device_handle(ACPI_COMPANION(dev)) +static inline struct fwnode_handle *acpi_alloc_fwnode_static(void) +{ + struct fwnode_handle *fwnode; + + fwnode = kzalloc(sizeof(struct fwnode_handle), GFP_KERNEL); + if (!fwnode) + return NULL; + + fwnode->type = FWNODE_ACPI_STATIC; + + return fwnode; +} + +static inline void acpi_free_fwnode_static(struct fwnode_handle *fwnode) +{ + if (WARN_ON(!fwnode || fwnode->type != FWNODE_ACPI_STATIC)) + return; + + kfree(fwnode); +} + /** * ACPI_DEVICE_CLASS - macro used to describe an ACPI device with * the PCI-defined class-code information @@ -741,6 +762,11 @@ static inline enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev) return DEV_DMA_NOT_SUPPORTED; } +static inline void acpi_dma_configure(struct device *dev, + enum dev_dma_attr attr) { } + +static inline void acpi_dma_deconfigure(struct device *dev) { } + #define ACPI_PTR(_ptr) (NULL) static inline void acpi_device_set_enumerated(struct acpi_device *adev) diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index 0e32dac8fd03..77e08099e554 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -23,20 +23,36 @@ #include <linux/fwnode.h> #include <linux/irqdomain.h> +#define IORT_IRQ_MASK(irq) (irq & 0xffffffffULL) +#define IORT_IRQ_TRIGGER_MASK(irq) ((irq >> 32) & 0xffffffffULL) + int iort_register_domain_token(int trans_id, struct fwnode_handle *fw_node); void iort_deregister_domain_token(int trans_id); struct fwnode_handle *iort_find_domain_token(int trans_id); #ifdef CONFIG_ACPI_IORT void acpi_iort_init(void); +bool iort_node_match(u8 type); u32 iort_msi_map_rid(struct device *dev, u32 req_id); struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id); +/* IOMMU interface */ +void iort_set_dma_mask(struct device *dev); +const struct iommu_ops *iort_iommu_configure(struct device *dev); #else static inline void acpi_iort_init(void) { } +static inline bool iort_node_match(u8 type) { return false; } static inline u32 iort_msi_map_rid(struct device *dev, u32 req_id) { return req_id; } static inline struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id) { return NULL; } +/* IOMMU interface */ +static inline void iort_set_dma_mask(struct device *dev) { } +static inline +const struct iommu_ops *iort_iommu_configure(struct device *dev) +{ return NULL; } #endif +#define IORT_ACPI_DECLARE(name, table_id, fn) \ + ACPI_DECLARE_PROBE_ENTRY(iort, name, table_id, 0, NULL, 0, fn) + #endif /* __ACPI_IORT_H__ */ diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h index 32c589062bd9..7f7e9a7e3839 100644 --- a/include/linux/dma-iommu.h +++ b/include/linux/dma-iommu.h @@ -61,6 +61,10 @@ void iommu_dma_unmap_page(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir, unsigned long attrs); void iommu_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir, unsigned long attrs); +dma_addr_t iommu_dma_map_resource(struct device *dev, phys_addr_t phys, + size_t size, enum dma_data_direction dir, unsigned long attrs); +void iommu_dma_unmap_resource(struct device *dev, dma_addr_t handle, + size_t size, enum dma_data_direction dir, unsigned long attrs); int iommu_dma_supported(struct device *dev, u64 mask); int iommu_dma_mapping_error(struct device *dev, dma_addr_t dma_addr); diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index 851671742790..8bd28ce6d76e 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -17,8 +17,9 @@ enum fwnode_type { FWNODE_OF, FWNODE_ACPI, FWNODE_ACPI_DATA, + FWNODE_ACPI_STATIC, FWNODE_PDATA, - FWNODE_IRQCHIP, + FWNODE_IRQCHIP }; struct fwnode_handle { diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 436dc21318af..0ff5111f6959 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -253,6 +253,7 @@ extern void iommu_group_remove_device(struct device *dev); extern int iommu_group_for_each_dev(struct iommu_group *group, void *data, int (*fn)(struct device *, void *)); extern struct iommu_group *iommu_group_get(struct device *dev); +extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group); extern void iommu_group_put(struct iommu_group *group); extern int iommu_group_register_notifier(struct iommu_group *group, struct notifier_block *nb); @@ -351,6 +352,9 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode, const struct iommu_ops *ops); void iommu_fwspec_free(struct device *dev); int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids); +void iommu_register_instance(struct fwnode_handle *fwnode, + const struct iommu_ops *ops); +const struct iommu_ops *iommu_get_instance(struct fwnode_handle *fwnode); #else /* CONFIG_IOMMU_API */ @@ -580,6 +584,17 @@ static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids, return -ENODEV; } +static inline void iommu_register_instance(struct fwnode_handle *fwnode, + const struct iommu_ops *ops) +{ +} + +static inline +const struct iommu_ops *iommu_get_instance(struct fwnode_handle *fwnode) +{ + return NULL; +} + #endif /* CONFIG_IOMMU_API */ #endif /* __LINUX_IOMMU_H */ diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h index e80b9c762a03..6a7fc5051099 100644 --- a/include/linux/of_iommu.h +++ b/include/linux/of_iommu.h @@ -31,8 +31,16 @@ static inline const struct iommu_ops *of_iommu_configure(struct device *dev, #endif /* CONFIG_OF_IOMMU */ -void of_iommu_set_ops(struct device_node *np, const struct iommu_ops *ops); -const struct iommu_ops *of_iommu_get_ops(struct device_node *np); +static inline void of_iommu_set_ops(struct device_node *np, + const struct iommu_ops *ops) +{ + iommu_register_instance(&np->fwnode, ops); +} + +static inline const struct iommu_ops *of_iommu_get_ops(struct device_node *np) +{ + return iommu_get_instance(&np->fwnode); +} extern struct of_device_id __iommu_of_table; |