diff options
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 297 |
1 files changed, 145 insertions, 152 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index d2f3435e7d17..3c9da1f8979e 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -37,6 +37,7 @@ struct iommu_group; struct bus_type; struct device; struct iommu_domain; +struct iommu_domain_ops; struct notifier_block; struct iommu_sva; struct iommu_fault_event; @@ -88,7 +89,7 @@ struct iommu_domain_geometry { struct iommu_domain { unsigned type; - const struct iommu_ops *ops; + const struct iommu_domain_ops *ops; unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */ iommu_fault_handler_t handler; void *handler_token; @@ -102,10 +103,11 @@ static inline bool iommu_is_dma_domain(struct iommu_domain *domain) } enum iommu_cap { - IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA - transactions */ + IOMMU_CAP_CACHE_COHERENCY, /* IOMMU_CACHE is supported */ IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */ IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */ + IOMMU_CAP_PRE_BOOT_PROTECTION, /* Firmware says it used the IOMMU for + DMA protection and we should too */ }; /* These are the possible reserved region types */ @@ -133,6 +135,7 @@ enum iommu_resv_type { * @length: Length of the region in bytes * @prot: IOMMU Protection flags (READ/WRITE/...) * @type: Type of the reserved region + * @free: Callback to free associated memory allocations */ struct iommu_resv_region { struct list_head list; @@ -140,11 +143,19 @@ struct iommu_resv_region { size_t length; int prot; enum iommu_resv_type type; + void (*free)(struct device *dev, struct iommu_resv_region *region); +}; + +struct iommu_iort_rmr_data { + struct iommu_resv_region rr; + + /* Stream IDs associated with IORT RMR entry */ + const u32 *sids; + u32 num_sids; }; /** * enum iommu_dev_features - Per device IOMMU features - * @IOMMU_DEV_FEAT_AUX: Auxiliary domain feature * @IOMMU_DEV_FEAT_SVA: Shared Virtual Addresses * @IOMMU_DEV_FEAT_IOPF: I/O Page Faults such as PRI or Stall. Generally * enabling %IOMMU_DEV_FEAT_SVA requires @@ -153,11 +164,9 @@ struct iommu_resv_region { * supported, this feature must be enabled before and * disabled after %IOMMU_DEV_FEAT_SVA. * - * Device drivers query whether a feature is supported using - * iommu_dev_has_feature(), and enable it using iommu_dev_enable_feature(). + * Device drivers enable a feature using iommu_dev_enable_feature(). */ enum iommu_dev_features { - IOMMU_DEV_FEAT_AUX, IOMMU_DEV_FEAT_SVA, IOMMU_DEV_FEAT_IOPF, }; @@ -186,7 +195,7 @@ struct iommu_iotlb_gather { unsigned long start; unsigned long end; size_t pgsize; - struct page *freelist; + struct list_head freelist; bool queued; }; @@ -194,105 +203,50 @@ struct iommu_iotlb_gather { * struct iommu_ops - iommu ops and capabilities * @capable: check capability * @domain_alloc: allocate iommu domain - * @domain_free: free iommu domain - * @attach_dev: attach device to an iommu domain - * @detach_dev: detach device from an iommu domain - * @map: map a physically contiguous memory region to an iommu domain - * @map_pages: map a physically contiguous set of pages of the same size to - * an iommu domain. - * @unmap: unmap a physically contiguous memory region from an iommu domain - * @unmap_pages: unmap a number of pages of the same size from an iommu domain - * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain - * @iotlb_sync_map: Sync mappings created recently using @map to the hardware - * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush - * queue - * @iova_to_phys: translate iova to physical address * @probe_device: Add device to iommu driver handling * @release_device: Remove device from iommu driver handling * @probe_finalize: Do final setup work after the device is added to an IOMMU * group and attached to the groups domain * @device_group: find iommu group for a particular device - * @enable_nesting: Enable nesting - * @set_pgtable_quirks: Set io page table quirks (IO_PGTABLE_QUIRK_*) * @get_resv_regions: Request list of reserved regions for a device - * @put_resv_regions: Free list of reserved regions for a device - * @apply_resv_region: Temporary helper call-back for iova reserved ranges * @of_xlate: add OF master IDs to iommu grouping * @is_attach_deferred: Check if domain attach should be deferred from iommu * driver init to device driver init (default no) - * @dev_has/enable/disable_feat: per device entries to check/enable/disable + * @dev_enable/disable_feat: per device entries to enable/disable * iommu specific features. - * @dev_feat_enabled: check enabled feature - * @aux_attach/detach_dev: aux-domain specific attach/detach entries. - * @aux_get_pasid: get the pasid given an aux-domain * @sva_bind: Bind process address space to device * @sva_unbind: Unbind process address space from device * @sva_get_pasid: Get PASID associated to a SVA handle * @page_response: handle page request response - * @cache_invalidate: invalidate translation caches - * @sva_bind_gpasid: bind guest pasid and mm - * @sva_unbind_gpasid: unbind guest pasid and mm * @def_domain_type: device default domain type, return value: * - IOMMU_DOMAIN_IDENTITY: must use an identity domain * - IOMMU_DOMAIN_DMA: must use a dma domain * - 0: use the default setting + * @default_domain_ops: the default ops for domains * @pgsize_bitmap: bitmap of all possible supported page sizes * @owner: Driver module providing these ops */ struct iommu_ops { - bool (*capable)(enum iommu_cap); + bool (*capable)(struct device *dev, enum iommu_cap); /* Domain allocation and freeing by the iommu driver */ struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type); - void (*domain_free)(struct iommu_domain *); - int (*attach_dev)(struct iommu_domain *domain, struct device *dev); - void (*detach_dev)(struct iommu_domain *domain, struct device *dev); - int (*map)(struct iommu_domain *domain, unsigned long iova, - phys_addr_t paddr, size_t size, int prot, gfp_t gfp); - int (*map_pages)(struct iommu_domain *domain, unsigned long iova, - phys_addr_t paddr, size_t pgsize, size_t pgcount, - int prot, gfp_t gfp, size_t *mapped); - size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, - size_t size, struct iommu_iotlb_gather *iotlb_gather); - size_t (*unmap_pages)(struct iommu_domain *domain, unsigned long iova, - size_t pgsize, size_t pgcount, - struct iommu_iotlb_gather *iotlb_gather); - void (*flush_iotlb_all)(struct iommu_domain *domain); - void (*iotlb_sync_map)(struct iommu_domain *domain, unsigned long iova, - size_t size); - void (*iotlb_sync)(struct iommu_domain *domain, - struct iommu_iotlb_gather *iotlb_gather); - phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova); struct iommu_device *(*probe_device)(struct device *dev); void (*release_device)(struct device *dev); void (*probe_finalize)(struct device *dev); struct iommu_group *(*device_group)(struct device *dev); - int (*enable_nesting)(struct iommu_domain *domain); - int (*set_pgtable_quirks)(struct iommu_domain *domain, - unsigned long quirks); /* Request/Free a list of reserved regions for a device */ void (*get_resv_regions)(struct device *dev, struct list_head *list); - void (*put_resv_regions)(struct device *dev, struct list_head *list); - void (*apply_resv_region)(struct device *dev, - struct iommu_domain *domain, - struct iommu_resv_region *region); int (*of_xlate)(struct device *dev, struct of_phandle_args *args); - bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev); + bool (*is_attach_deferred)(struct device *dev); /* Per device IOMMU features */ - bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f); - bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f); int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f); int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f); - /* Aux-domain specific attach/detach entries */ - int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev); - void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev); - int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev); - struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm, void *drvdata); void (*sva_unbind)(struct iommu_sva *handle); @@ -301,20 +255,68 @@ struct iommu_ops { int (*page_response)(struct device *dev, struct iommu_fault_event *evt, struct iommu_page_response *msg); - int (*cache_invalidate)(struct iommu_domain *domain, struct device *dev, - struct iommu_cache_invalidate_info *inv_info); - int (*sva_bind_gpasid)(struct iommu_domain *domain, - struct device *dev, struct iommu_gpasid_bind_data *data); - - int (*sva_unbind_gpasid)(struct device *dev, u32 pasid); int (*def_domain_type)(struct device *dev); + const struct iommu_domain_ops *default_domain_ops; unsigned long pgsize_bitmap; struct module *owner; }; /** + * struct iommu_domain_ops - domain specific operations + * @attach_dev: attach an iommu domain to a device + * @detach_dev: detach an iommu domain from a device + * @map: map a physically contiguous memory region to an iommu domain + * @map_pages: map a physically contiguous set of pages of the same size to + * an iommu domain. + * @unmap: unmap a physically contiguous memory region from an iommu domain + * @unmap_pages: unmap a number of pages of the same size from an iommu domain + * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain + * @iotlb_sync_map: Sync mappings created recently using @map to the hardware + * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush + * queue + * @iova_to_phys: translate iova to physical address + * @enforce_cache_coherency: Prevent any kind of DMA from bypassing IOMMU_CACHE, + * including no-snoop TLPs on PCIe or other platform + * specific mechanisms. + * @enable_nesting: Enable nesting + * @set_pgtable_quirks: Set io page table quirks (IO_PGTABLE_QUIRK_*) + * @free: Release the domain after use. + */ +struct iommu_domain_ops { + int (*attach_dev)(struct iommu_domain *domain, struct device *dev); + void (*detach_dev)(struct iommu_domain *domain, struct device *dev); + + int (*map)(struct iommu_domain *domain, unsigned long iova, + phys_addr_t paddr, size_t size, int prot, gfp_t gfp); + int (*map_pages)(struct iommu_domain *domain, unsigned long iova, + phys_addr_t paddr, size_t pgsize, size_t pgcount, + int prot, gfp_t gfp, size_t *mapped); + size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, + size_t size, struct iommu_iotlb_gather *iotlb_gather); + size_t (*unmap_pages)(struct iommu_domain *domain, unsigned long iova, + size_t pgsize, size_t pgcount, + struct iommu_iotlb_gather *iotlb_gather); + + void (*flush_iotlb_all)(struct iommu_domain *domain); + void (*iotlb_sync_map)(struct iommu_domain *domain, unsigned long iova, + size_t size); + void (*iotlb_sync)(struct iommu_domain *domain, + struct iommu_iotlb_gather *iotlb_gather); + + phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, + dma_addr_t iova); + + bool (*enforce_cache_coherency)(struct iommu_domain *domain); + int (*enable_nesting)(struct iommu_domain *domain); + int (*set_pgtable_quirks)(struct iommu_domain *domain, + unsigned long quirks); + + void (*free)(struct iommu_domain *domain); +}; + +/** * struct iommu_device - IOMMU core representation of one IOMMU hardware * instance * @list: Used by the iommu-core to keep a list of registered iommus @@ -399,20 +401,24 @@ static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather) { *gather = (struct iommu_iotlb_gather) { .start = ULONG_MAX, + .freelist = LIST_HEAD_INIT(gather->freelist), }; } -#define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */ -#define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */ -#define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */ -#define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */ -#define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */ -#define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */ +static inline const struct iommu_ops *dev_iommu_ops(struct device *dev) +{ + /* + * Assume that valid ops must be installed if iommu_probe_device() + * has succeeded. The device ops are essentially for internal use + * within the IOMMU subsystem itself, so we should be able to trust + * ourselves not to misuse the helper. + */ + return dev->iommu->iommu_dev->ops; +} -extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops); extern int bus_iommu_probe(struct bus_type *bus); extern bool iommu_present(struct bus_type *bus); -extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap); +extern bool device_iommu_capable(struct device *dev, enum iommu_cap cap); extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus); extern struct iommu_group *iommu_group_get_by_id(int id); extern void iommu_domain_free(struct iommu_domain *domain); @@ -420,14 +426,6 @@ extern int iommu_attach_device(struct iommu_domain *domain, struct device *dev); extern void iommu_detach_device(struct iommu_domain *domain, struct device *dev); -extern int iommu_uapi_cache_invalidate(struct iommu_domain *domain, - struct device *dev, - void __user *uinfo); - -extern int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain, - struct device *dev, void __user *udata); -extern int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain, - struct device *dev, void __user *udata); extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain, struct device *dev, ioasid_t pasid); extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev); @@ -452,14 +450,12 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain, extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); -extern void generic_iommu_put_resv_regions(struct device *dev, - struct list_head *list); extern void iommu_set_default_passthrough(bool cmd_line); extern void iommu_set_default_translated(bool cmd_line); extern bool iommu_default_passthrough(void); extern struct iommu_resv_region * iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, - enum iommu_resv_type type); + enum iommu_resv_type type, gfp_t gfp); extern int iommu_get_group_resv_regions(struct iommu_group *group, struct list_head *head); @@ -481,10 +477,6 @@ extern int iommu_group_for_each_dev(struct iommu_group *group, void *data, 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); -extern int iommu_group_unregister_notifier(struct iommu_group *group, - struct notifier_block *nb); extern int iommu_register_device_fault_handler(struct device *dev, iommu_dev_fault_handler_t handler, void *data); @@ -670,10 +662,6 @@ void iommu_release_device(struct device *dev); int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f); int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f); -bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f); -int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev); -void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev); -int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev); struct iommu_sva *iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, @@ -681,6 +669,13 @@ struct iommu_sva *iommu_sva_bind_device(struct device *dev, void iommu_sva_unbind_device(struct iommu_sva *handle); u32 iommu_sva_get_pasid(struct iommu_sva *handle); +int iommu_device_use_default_domain(struct device *dev); +void iommu_device_unuse_default_domain(struct device *dev); + +int iommu_group_claim_dma_owner(struct iommu_group *group, void *owner); +void iommu_group_release_dma_owner(struct iommu_group *group); +bool iommu_group_dma_owner_claimed(struct iommu_group *group); + #else /* CONFIG_IOMMU_API */ struct iommu_ops {}; @@ -695,7 +690,7 @@ static inline bool iommu_present(struct bus_type *bus) return false; } -static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap) +static inline bool device_iommu_capable(struct device *dev, enum iommu_cap cap) { return false; } @@ -877,18 +872,6 @@ static inline void iommu_group_put(struct iommu_group *group) { } -static inline int iommu_group_register_notifier(struct iommu_group *group, - struct notifier_block *nb) -{ - return -ENODEV; -} - -static inline int iommu_group_unregister_notifier(struct iommu_group *group, - struct notifier_block *nb) -{ - return 0; -} - static inline int iommu_register_device_fault_handler(struct device *dev, iommu_dev_fault_handler_t handler, @@ -1000,12 +983,6 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode) return NULL; } -static inline bool -iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat) -{ - return false; -} - static inline int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat) { @@ -1018,23 +995,6 @@ iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat) return -ENODEV; } -static inline int -iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev) -{ - return -ENODEV; -} - -static inline void -iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev) -{ -} - -static inline int -iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev) -{ - return -ENODEV; -} - static inline struct iommu_sva * iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata) { @@ -1050,36 +1010,33 @@ static inline u32 iommu_sva_get_pasid(struct iommu_sva *handle) return IOMMU_PASID_INVALID; } -static inline int -iommu_uapi_cache_invalidate(struct iommu_domain *domain, - struct device *dev, - struct iommu_cache_invalidate_info *inv_info) +static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev) { - return -ENODEV; + return NULL; } -static inline int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain, - struct device *dev, void __user *udata) +static inline int iommu_device_use_default_domain(struct device *dev) { - return -ENODEV; + return 0; } -static inline int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain, - struct device *dev, void __user *udata) +static inline void iommu_device_unuse_default_domain(struct device *dev) { - return -ENODEV; } -static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain, - struct device *dev, - ioasid_t pasid) +static inline int +iommu_group_claim_dma_owner(struct iommu_group *group, void *owner) { return -ENODEV; } -static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev) +static inline void iommu_group_release_dma_owner(struct iommu_group *group) { - return NULL; +} + +static inline bool iommu_group_dma_owner_claimed(struct iommu_group *group) +{ + return false; } #endif /* CONFIG_IOMMU_API */ @@ -1106,4 +1063,40 @@ void iommu_debugfs_setup(void); static inline void iommu_debugfs_setup(void) {} #endif +#ifdef CONFIG_IOMMU_DMA +#include <linux/msi.h> + +/* Setup call for arch DMA mapping code */ +void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 dma_limit); + +int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base); + +int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr); +void iommu_dma_compose_msi_msg(struct msi_desc *desc, struct msi_msg *msg); + +#else /* CONFIG_IOMMU_DMA */ + +struct msi_desc; +struct msi_msg; + +static inline void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 dma_limit) +{ +} + +static inline int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base) +{ + return -ENODEV; +} + +static inline int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr) +{ + return 0; +} + +static inline void iommu_dma_compose_msi_msg(struct msi_desc *desc, struct msi_msg *msg) +{ +} + +#endif /* CONFIG_IOMMU_DMA */ + #endif /* __LINUX_IOMMU_H */ |