diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-13 19:15:30 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-13 19:15:30 +0300 |
commit | 8c9c2f851b5a58195ed7ebd67d7c59683d1a02bc (patch) | |
tree | 71ac6a26fec18236c1ca36a5a5ebcc4ede0b8cd1 /include | |
parent | b0546776ad3f332e215cebc0b063ba4351971cca (diff) | |
parent | f379a7e9c3b5c325ff550e911ea42092295695de (diff) | |
download | linux-8c9c2f851b5a58195ed7ebd67d7c59683d1a02bc.tar.xz |
Merge tag 'iommu-updates-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu updates from Joerg Roedel:
"Core changes:
- Constification of bus_type pointer
- Preparations for user-space page-fault delivery
- Use a named kmem_cache for IOVA magazines
Intel VT-d changes from Lu Baolu:
- Add RBTree to track iommu probed devices
- Add Intel IOMMU debugfs document
- Cleanup and refactoring
ARM-SMMU Updates from Will Deacon:
- Device-tree binding updates for a bunch of Qualcomm SoCs
- SMMUv2: Support for Qualcomm X1E80100 MDSS
- SMMUv3: Significant rework of the driver's STE manipulation and
domain handling code. This is the initial part of a larger scale
rework aiming to improve the driver's implementation of the
IOMMU-API in preparation for hooking up IOMMUFD support.
AMD-Vi Updates:
- Refactor GCR3 table support for SVA
- Cleanups
Some smaller cleanups and fixes"
* tag 'iommu-updates-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (88 commits)
iommu: Fix compilation without CONFIG_IOMMU_INTEL
iommu/amd: Fix sleeping in atomic context
iommu/dma: Document min_align_mask assumption
iommu/vt-d: Remove scalabe mode in domain_context_clear_one()
iommu/vt-d: Remove scalable mode context entry setup from attach_dev
iommu/vt-d: Setup scalable mode context entry in probe path
iommu/vt-d: Fix NULL domain on device release
iommu: Add static iommu_ops->release_domain
iommu/vt-d: Improve ITE fault handling if target device isn't present
iommu/vt-d: Don't issue ATS Invalidation request when device is disconnected
PCI: Make pci_dev_is_disconnected() helper public for other drivers
iommu/vt-d: Use device rbtree in iopf reporting path
iommu/vt-d: Use rbtree to track iommu probed devices
iommu/vt-d: Merge intel_svm_bind_mm() into its caller
iommu/vt-d: Remove initialization for dynamically heap-allocated rcu_head
iommu/vt-d: Remove treatment for revoking PASIDs with pending page faults
iommu/vt-d: Add the document for Intel IOMMU debugfs
iommu/vt-d: Use kcalloc() instead of kzalloc()
iommu/vt-d: Remove INTEL_IOMMU_BROKEN_GFX_WA
iommu: re-use local fwnode variable in iommu_ops_from_fwnode()
...
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/iommu.h | 295 | ||||
-rw-r--r-- | include/linux/pci.h | 5 | ||||
-rw-r--r-- | include/uapi/linux/iommu.h | 161 |
3 files changed, 222 insertions, 239 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 5e27cb3a3be9..2e925b5eba53 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -14,7 +14,6 @@ #include <linux/err.h> #include <linux/of.h> #include <linux/iova_bitmap.h> -#include <uapi/linux/iommu.h> #define IOMMU_READ (1 << 0) #define IOMMU_WRITE (1 << 1) @@ -41,8 +40,110 @@ struct iommu_domain_ops; struct iommu_dirty_ops; struct notifier_block; struct iommu_sva; -struct iommu_fault_event; struct iommu_dma_cookie; +struct iommu_fault_param; + +#define IOMMU_FAULT_PERM_READ (1 << 0) /* read */ +#define IOMMU_FAULT_PERM_WRITE (1 << 1) /* write */ +#define IOMMU_FAULT_PERM_EXEC (1 << 2) /* exec */ +#define IOMMU_FAULT_PERM_PRIV (1 << 3) /* privileged */ + +/* Generic fault types, can be expanded IRQ remapping fault */ +enum iommu_fault_type { + IOMMU_FAULT_PAGE_REQ = 1, /* page request fault */ +}; + +/** + * struct iommu_fault_page_request - Page Request data + * @flags: encodes whether the corresponding fields are valid and whether this + * is the last page in group (IOMMU_FAULT_PAGE_REQUEST_* values). + * When IOMMU_FAULT_PAGE_RESPONSE_NEEDS_PASID is set, the page response + * must have the same PASID value as the page request. When it is clear, + * the page response should not have a PASID. + * @pasid: Process Address Space ID + * @grpid: Page Request Group Index + * @perm: requested page permissions (IOMMU_FAULT_PERM_* values) + * @addr: page address + * @private_data: device-specific private information + */ +struct iommu_fault_page_request { +#define IOMMU_FAULT_PAGE_REQUEST_PASID_VALID (1 << 0) +#define IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE (1 << 1) +#define IOMMU_FAULT_PAGE_REQUEST_PRIV_DATA (1 << 2) +#define IOMMU_FAULT_PAGE_RESPONSE_NEEDS_PASID (1 << 3) + u32 flags; + u32 pasid; + u32 grpid; + u32 perm; + u64 addr; + u64 private_data[2]; +}; + +/** + * struct iommu_fault - Generic fault data + * @type: fault type from &enum iommu_fault_type + * @prm: Page Request message, when @type is %IOMMU_FAULT_PAGE_REQ + */ +struct iommu_fault { + u32 type; + struct iommu_fault_page_request prm; +}; + +/** + * enum iommu_page_response_code - Return status of fault handlers + * @IOMMU_PAGE_RESP_SUCCESS: Fault has been handled and the page tables + * populated, retry the access. This is "Success" in PCI PRI. + * @IOMMU_PAGE_RESP_FAILURE: General error. Drop all subsequent faults from + * this device if possible. This is "Response Failure" in PCI PRI. + * @IOMMU_PAGE_RESP_INVALID: Could not handle this fault, don't retry the + * access. This is "Invalid Request" in PCI PRI. + */ +enum iommu_page_response_code { + IOMMU_PAGE_RESP_SUCCESS = 0, + IOMMU_PAGE_RESP_INVALID, + IOMMU_PAGE_RESP_FAILURE, +}; + +/** + * struct iommu_page_response - Generic page response information + * @pasid: Process Address Space ID + * @grpid: Page Request Group Index + * @code: response code from &enum iommu_page_response_code + */ +struct iommu_page_response { + u32 pasid; + u32 grpid; + u32 code; +}; + +struct iopf_fault { + struct iommu_fault fault; + /* node for pending lists */ + struct list_head list; +}; + +struct iopf_group { + struct iopf_fault last_fault; + struct list_head faults; + /* list node for iommu_fault_param::faults */ + struct list_head pending_node; + struct work_struct work; + struct iommu_domain *domain; + /* The device's fault data parameter. */ + struct iommu_fault_param *fault_param; +}; + +/** + * struct iopf_queue - IO Page Fault queue + * @wq: the fault workqueue + * @devices: devices attached to this queue + * @lock: protects the device list + */ +struct iopf_queue { + struct workqueue_struct *wq; + struct list_head devices; + struct mutex lock; +}; /* iommu fault flags */ #define IOMMU_FAULT_READ 0x0 @@ -50,7 +151,6 @@ struct iommu_dma_cookie; typedef int (*iommu_fault_handler_t)(struct iommu_domain *, struct device *, unsigned long, int, void *); -typedef int (*iommu_dev_fault_handler_t)(struct iommu_fault *, void *); struct iommu_domain_geometry { dma_addr_t aperture_start; /* First address that can be mapped */ @@ -110,8 +210,7 @@ struct iommu_domain { unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */ struct iommu_domain_geometry geometry; struct iommu_dma_cookie *iova_cookie; - enum iommu_page_response_code (*iopf_handler)(struct iommu_fault *fault, - void *data); + int (*iopf_handler)(struct iopf_group *group); void *fault_data; union { struct { @@ -468,16 +567,15 @@ struct iommu_ops { /* Request/Free a list of reserved regions for a device */ void (*get_resv_regions)(struct device *dev, struct list_head *list); - int (*of_xlate)(struct device *dev, struct of_phandle_args *args); + int (*of_xlate)(struct device *dev, const struct of_phandle_args *args); bool (*is_attach_deferred)(struct device *dev); /* Per device IOMMU features */ int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f); int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f); - int (*page_response)(struct device *dev, - struct iommu_fault_event *evt, - struct iommu_page_response *msg); + void (*page_response)(struct device *dev, struct iopf_fault *evt, + struct iommu_page_response *msg); int (*def_domain_type)(struct device *dev); void (*remove_dev_pasid)(struct device *dev, ioasid_t pasid); @@ -487,6 +585,7 @@ struct iommu_ops { struct module *owner; struct iommu_domain *identity_domain; struct iommu_domain *blocked_domain; + struct iommu_domain *release_domain; struct iommu_domain *default_domain; }; @@ -578,38 +677,34 @@ struct iommu_device { }; /** - * struct iommu_fault_event - Generic fault event - * - * Can represent recoverable faults such as a page requests or - * unrecoverable faults such as DMA or IRQ remapping faults. - * - * @fault: fault descriptor - * @list: pending fault event list, used for tracking responses - */ -struct iommu_fault_event { - struct iommu_fault fault; - struct list_head list; -}; - -/** * struct iommu_fault_param - per-device IOMMU fault data - * @handler: Callback function to handle IOMMU faults at device level - * @data: handler private data - * @faults: holds the pending faults which needs response * @lock: protect pending faults list + * @users: user counter to manage the lifetime of the data + * @rcu: rcu head for kfree_rcu() + * @dev: the device that owns this param + * @queue: IOPF queue + * @queue_list: index into queue->devices + * @partial: faults that are part of a Page Request Group for which the last + * request hasn't been submitted yet. + * @faults: holds the pending faults which need response */ struct iommu_fault_param { - iommu_dev_fault_handler_t handler; - void *data; - struct list_head faults; struct mutex lock; + refcount_t users; + struct rcu_head rcu; + + struct device *dev; + struct iopf_queue *queue; + struct list_head queue_list; + + struct list_head partial; + struct list_head faults; }; /** * struct dev_iommu - Collection of per-device IOMMU data * * @fault_param: IOMMU detected device fault reporting data - * @iopf_param: I/O Page Fault queue and data * @fwspec: IOMMU fwspec data * @iommu_dev: IOMMU device this device is linked to * @priv: IOMMU Driver private data @@ -624,8 +719,7 @@ struct iommu_fault_param { */ struct dev_iommu { struct mutex lock; - struct iommu_fault_param *fault_param; - struct iopf_device_param *iopf_param; + struct iommu_fault_param __rcu *fault_param; struct iommu_fwspec *fwspec; struct iommu_device *iommu_dev; void *priv; @@ -654,6 +748,22 @@ static inline struct iommu_device *dev_to_iommu_device(struct device *dev) return (struct iommu_device *)dev_get_drvdata(dev); } +/** + * iommu_get_iommu_dev - Get iommu_device for a device + * @dev: an end-point device + * + * Note that this function must be called from the iommu_ops + * to retrieve the iommu_device for a device, which the core code + * guarentees it will not invoke the op without an attached iommu. + */ +static inline struct iommu_device *__iommu_get_iommu_dev(struct device *dev) +{ + return dev->iommu->iommu_dev; +} + +#define iommu_get_iommu_dev(dev, type, member) \ + container_of(__iommu_get_iommu_dev(dev), type, member) + static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather) { *gather = (struct iommu_iotlb_gather) { @@ -719,16 +829,6 @@ 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_register_device_fault_handler(struct device *dev, - iommu_dev_fault_handler_t handler, - void *data); - -extern int iommu_unregister_device_fault_handler(struct device *dev); - -extern int iommu_report_device_fault(struct device *dev, - struct iommu_fault_event *evt); -extern int iommu_page_response(struct device *dev, - struct iommu_page_response *msg); extern int iommu_group_id(struct iommu_group *group); extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *); @@ -905,8 +1005,8 @@ struct iommu_mm_data { 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); -const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode); +int iommu_fwspec_add_ids(struct device *dev, const u32 *ids, int num_ids); +const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode); static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev) { @@ -948,8 +1048,6 @@ bool iommu_group_dma_owner_claimed(struct iommu_group *group); int iommu_device_claim_dma_owner(struct device *dev, void *owner); void iommu_device_release_dma_owner(struct device *dev); -struct iommu_domain *iommu_sva_domain_alloc(struct device *dev, - struct mm_struct *mm); int iommu_attach_device_pasid(struct iommu_domain *domain, struct device *dev, ioasid_t pasid); void iommu_detach_device_pasid(struct iommu_domain *domain, @@ -1138,31 +1236,6 @@ static inline void iommu_group_put(struct iommu_group *group) { } -static inline -int iommu_register_device_fault_handler(struct device *dev, - iommu_dev_fault_handler_t handler, - void *data) -{ - return -ENODEV; -} - -static inline int iommu_unregister_device_fault_handler(struct device *dev) -{ - return 0; -} - -static inline -int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt) -{ - return -ENODEV; -} - -static inline int iommu_page_response(struct device *dev, - struct iommu_page_response *msg) -{ - return -ENODEV; -} - static inline int iommu_group_id(struct iommu_group *group) { return -ENODEV; @@ -1256,7 +1329,7 @@ static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids, } static inline -const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode) +const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode) { return NULL; } @@ -1311,12 +1384,6 @@ static inline int iommu_device_claim_dma_owner(struct device *dev, void *owner) return -ENODEV; } -static inline struct iommu_domain * -iommu_sva_domain_alloc(struct device *dev, struct mm_struct *mm) -{ - return NULL; -} - static inline int iommu_attach_device_pasid(struct iommu_domain *domain, struct device *dev, ioasid_t pasid) { @@ -1343,6 +1410,14 @@ static inline ioasid_t iommu_alloc_global_pasid(struct device *dev) static inline void iommu_free_global_pasid(ioasid_t pasid) {} #endif /* CONFIG_IOMMU_API */ +#if IS_ENABLED(CONFIG_LOCKDEP) && IS_ENABLED(CONFIG_IOMMU_API) +void iommu_group_mutex_assert(struct device *dev); +#else +static inline void iommu_group_mutex_assert(struct device *dev) +{ +} +#endif + /** * iommu_map_sgtable - Map the given buffer to the IOMMU domain * @domain: The IOMMU domain to perform the mapping @@ -1456,6 +1531,8 @@ struct iommu_sva *iommu_sva_bind_device(struct device *dev, struct mm_struct *mm); void iommu_sva_unbind_device(struct iommu_sva *handle); u32 iommu_sva_get_pasid(struct iommu_sva *handle); +struct iommu_domain *iommu_sva_domain_alloc(struct device *dev, + struct mm_struct *mm); #else static inline struct iommu_sva * iommu_sva_bind_device(struct device *dev, struct mm_struct *mm) @@ -1480,6 +1557,68 @@ static inline u32 mm_get_enqcmd_pasid(struct mm_struct *mm) } static inline void mm_pasid_drop(struct mm_struct *mm) {} + +static inline struct iommu_domain * +iommu_sva_domain_alloc(struct device *dev, struct mm_struct *mm) +{ + return NULL; +} #endif /* CONFIG_IOMMU_SVA */ +#ifdef CONFIG_IOMMU_IOPF +int iopf_queue_add_device(struct iopf_queue *queue, struct device *dev); +void iopf_queue_remove_device(struct iopf_queue *queue, struct device *dev); +int iopf_queue_flush_dev(struct device *dev); +struct iopf_queue *iopf_queue_alloc(const char *name); +void iopf_queue_free(struct iopf_queue *queue); +int iopf_queue_discard_partial(struct iopf_queue *queue); +void iopf_free_group(struct iopf_group *group); +void iommu_report_device_fault(struct device *dev, struct iopf_fault *evt); +void iopf_group_response(struct iopf_group *group, + enum iommu_page_response_code status); +#else +static inline int +iopf_queue_add_device(struct iopf_queue *queue, struct device *dev) +{ + return -ENODEV; +} + +static inline void +iopf_queue_remove_device(struct iopf_queue *queue, struct device *dev) +{ +} + +static inline int iopf_queue_flush_dev(struct device *dev) +{ + return -ENODEV; +} + +static inline struct iopf_queue *iopf_queue_alloc(const char *name) +{ + return NULL; +} + +static inline void iopf_queue_free(struct iopf_queue *queue) +{ +} + +static inline int iopf_queue_discard_partial(struct iopf_queue *queue) +{ + return -ENODEV; +} + +static inline void iopf_free_group(struct iopf_group *group) +{ +} + +static inline void +iommu_report_device_fault(struct device *dev, struct iopf_fault *evt) +{ +} + +static inline void iopf_group_response(struct iopf_group *group, + enum iommu_page_response_code status) +{ +} +#endif /* CONFIG_IOMMU_IOPF */ #endif /* __LINUX_IOMMU_H */ diff --git a/include/linux/pci.h b/include/linux/pci.h index 7ab0d13672da..213109d3c601 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2517,6 +2517,11 @@ static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev) return NULL; } +static inline bool pci_dev_is_disconnected(const struct pci_dev *dev) +{ + return dev->error_state == pci_channel_io_perm_failure; +} + void pci_request_acs(void); bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags); bool pci_acs_path_enabled(struct pci_dev *start, diff --git a/include/uapi/linux/iommu.h b/include/uapi/linux/iommu.h deleted file mode 100644 index 65d8b0234f69..000000000000 --- a/include/uapi/linux/iommu.h +++ /dev/null @@ -1,161 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -/* - * IOMMU user API definitions - */ - -#ifndef _UAPI_IOMMU_H -#define _UAPI_IOMMU_H - -#include <linux/types.h> - -#define IOMMU_FAULT_PERM_READ (1 << 0) /* read */ -#define IOMMU_FAULT_PERM_WRITE (1 << 1) /* write */ -#define IOMMU_FAULT_PERM_EXEC (1 << 2) /* exec */ -#define IOMMU_FAULT_PERM_PRIV (1 << 3) /* privileged */ - -/* Generic fault types, can be expanded IRQ remapping fault */ -enum iommu_fault_type { - IOMMU_FAULT_DMA_UNRECOV = 1, /* unrecoverable fault */ - IOMMU_FAULT_PAGE_REQ, /* page request fault */ -}; - -enum iommu_fault_reason { - IOMMU_FAULT_REASON_UNKNOWN = 0, - - /* Could not access the PASID table (fetch caused external abort) */ - IOMMU_FAULT_REASON_PASID_FETCH, - - /* PASID entry is invalid or has configuration errors */ - IOMMU_FAULT_REASON_BAD_PASID_ENTRY, - - /* - * PASID is out of range (e.g. exceeds the maximum PASID - * supported by the IOMMU) or disabled. - */ - IOMMU_FAULT_REASON_PASID_INVALID, - - /* - * An external abort occurred fetching (or updating) a translation - * table descriptor - */ - IOMMU_FAULT_REASON_WALK_EABT, - - /* - * Could not access the page table entry (Bad address), - * actual translation fault - */ - IOMMU_FAULT_REASON_PTE_FETCH, - - /* Protection flag check failed */ - IOMMU_FAULT_REASON_PERMISSION, - - /* access flag check failed */ - IOMMU_FAULT_REASON_ACCESS, - - /* Output address of a translation stage caused Address Size fault */ - IOMMU_FAULT_REASON_OOR_ADDRESS, -}; - -/** - * struct iommu_fault_unrecoverable - Unrecoverable fault data - * @reason: reason of the fault, from &enum iommu_fault_reason - * @flags: parameters of this fault (IOMMU_FAULT_UNRECOV_* values) - * @pasid: Process Address Space ID - * @perm: requested permission access using by the incoming transaction - * (IOMMU_FAULT_PERM_* values) - * @addr: offending page address - * @fetch_addr: address that caused a fetch abort, if any - */ -struct iommu_fault_unrecoverable { - __u32 reason; -#define IOMMU_FAULT_UNRECOV_PASID_VALID (1 << 0) -#define IOMMU_FAULT_UNRECOV_ADDR_VALID (1 << 1) -#define IOMMU_FAULT_UNRECOV_FETCH_ADDR_VALID (1 << 2) - __u32 flags; - __u32 pasid; - __u32 perm; - __u64 addr; - __u64 fetch_addr; -}; - -/** - * struct iommu_fault_page_request - Page Request data - * @flags: encodes whether the corresponding fields are valid and whether this - * is the last page in group (IOMMU_FAULT_PAGE_REQUEST_* values). - * When IOMMU_FAULT_PAGE_RESPONSE_NEEDS_PASID is set, the page response - * must have the same PASID value as the page request. When it is clear, - * the page response should not have a PASID. - * @pasid: Process Address Space ID - * @grpid: Page Request Group Index - * @perm: requested page permissions (IOMMU_FAULT_PERM_* values) - * @addr: page address - * @private_data: device-specific private information - */ -struct iommu_fault_page_request { -#define IOMMU_FAULT_PAGE_REQUEST_PASID_VALID (1 << 0) -#define IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE (1 << 1) -#define IOMMU_FAULT_PAGE_REQUEST_PRIV_DATA (1 << 2) -#define IOMMU_FAULT_PAGE_RESPONSE_NEEDS_PASID (1 << 3) - __u32 flags; - __u32 pasid; - __u32 grpid; - __u32 perm; - __u64 addr; - __u64 private_data[2]; -}; - -/** - * struct iommu_fault - Generic fault data - * @type: fault type from &enum iommu_fault_type - * @padding: reserved for future use (should be zero) - * @event: fault event, when @type is %IOMMU_FAULT_DMA_UNRECOV - * @prm: Page Request message, when @type is %IOMMU_FAULT_PAGE_REQ - * @padding2: sets the fault size to allow for future extensions - */ -struct iommu_fault { - __u32 type; - __u32 padding; - union { - struct iommu_fault_unrecoverable event; - struct iommu_fault_page_request prm; - __u8 padding2[56]; - }; -}; - -/** - * enum iommu_page_response_code - Return status of fault handlers - * @IOMMU_PAGE_RESP_SUCCESS: Fault has been handled and the page tables - * populated, retry the access. This is "Success" in PCI PRI. - * @IOMMU_PAGE_RESP_FAILURE: General error. Drop all subsequent faults from - * this device if possible. This is "Response Failure" in PCI PRI. - * @IOMMU_PAGE_RESP_INVALID: Could not handle this fault, don't retry the - * access. This is "Invalid Request" in PCI PRI. - */ -enum iommu_page_response_code { - IOMMU_PAGE_RESP_SUCCESS = 0, - IOMMU_PAGE_RESP_INVALID, - IOMMU_PAGE_RESP_FAILURE, -}; - -/** - * struct iommu_page_response - Generic page response information - * @argsz: User filled size of this data - * @version: API version of this structure - * @flags: encodes whether the corresponding fields are valid - * (IOMMU_FAULT_PAGE_RESPONSE_* values) - * @pasid: Process Address Space ID - * @grpid: Page Request Group Index - * @code: response code from &enum iommu_page_response_code - */ -struct iommu_page_response { - __u32 argsz; -#define IOMMU_PAGE_RESP_VERSION_1 1 - __u32 version; -#define IOMMU_PAGE_RESP_PASID_VALID (1 << 0) - __u32 flags; - __u32 pasid; - __u32 grpid; - __u32 code; -}; - -#endif /* _UAPI_IOMMU_H */ |