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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (C) 2007-2008 Advanced Micro Devices, Inc. * Author: Joerg Roedel <joerg.roedel@amd.com> */
#ifndef __LINUX_IOMMU_H#define __LINUX_IOMMU_H
#include <linux/scatterlist.h>#include <linux/device.h>#include <linux/types.h>#include <linux/errno.h>#include <linux/err.h>#include <linux/of.h>#include <linux/iova_bitmap.h>#include <uapi/linux/iommufd.h>
#define IOMMU_READ (1 << 0)#define IOMMU_WRITE (1 << 1)#define IOMMU_CACHE (1 << 2) /* DMA cache coherency */#define IOMMU_NOEXEC (1 << 3)#define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells *//* * Where the bus hardware includes a privilege level as part of its access type * markings, and certain devices are capable of issuing transactions marked as * either 'supervisor' or 'user', the IOMMU_PRIV flag requests that the other * given permission flags only apply to accesses at the higher privilege level, * and that unprivileged transactions should have as little access as possible. * This would usually imply the same permissions as kernel mappings on the CPU, * if the IOMMU page table format is equivalent. */#define IOMMU_PRIV (1 << 5)
struct iommu_ops;struct iommu_group;struct bus_type;struct device;struct iommu_domain;struct iommu_domain_ops;struct iommu_dirty_ops;struct notifier_block;struct iommu_sva;struct iommu_dma_cookie;struct iommu_dma_msi_cookie;struct iommu_fault_param;struct iommufd_ctx;struct iommufd_viommu;struct msi_desc;struct msi_msg;
#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_RESPONSE_NEEDS_PASID (1 << 2) 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; size_t fault_count; /* list node for iommu_fault_param::faults */ struct list_head pending_node; struct work_struct work; struct iommu_attach_handle *attach_handle; /* The device's fault data parameter. */ struct iommu_fault_param *fault_param; /* Used by handler provider to hook the group on its own lists. */ struct list_head node; u32 cookie;};
/** * 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#define IOMMU_FAULT_WRITE 0x1
typedef int (*iommu_fault_handler_t)(struct iommu_domain *, struct device *, unsigned long, int, void *);
struct iommu_domain_geometry { dma_addr_t aperture_start; /* First address that can be mapped */ dma_addr_t aperture_end; /* Last address that can be mapped */ bool force_aperture; /* DMA only allowed in mappable range? */};
enum iommu_domain_cookie_type { IOMMU_COOKIE_NONE, IOMMU_COOKIE_DMA_IOVA, IOMMU_COOKIE_DMA_MSI, IOMMU_COOKIE_FAULT_HANDLER, IOMMU_COOKIE_SVA, IOMMU_COOKIE_IOMMUFD,};
/* Domain feature flags */#define __IOMMU_DOMAIN_PAGING (1U << 0) /* Support for iommu_map/unmap */#define __IOMMU_DOMAIN_DMA_API (1U << 1) /* Domain for use in DMA-API implementation */#define __IOMMU_DOMAIN_PT (1U << 2) /* Domain is identity mapped */#define __IOMMU_DOMAIN_DMA_FQ (1U << 3) /* DMA-API uses flush queue */
#define __IOMMU_DOMAIN_SVA (1U << 4) /* Shared process address space */#define __IOMMU_DOMAIN_PLATFORM (1U << 5)
#define __IOMMU_DOMAIN_NESTED (1U << 6) /* User-managed address space nested on a stage-2 translation */
#define IOMMU_DOMAIN_ALLOC_FLAGS ~__IOMMU_DOMAIN_DMA_FQ/* * This are the possible domain-types * * IOMMU_DOMAIN_BLOCKED - All DMA is blocked, can be used to isolate * devices * IOMMU_DOMAIN_IDENTITY - DMA addresses are system physical addresses * IOMMU_DOMAIN_UNMANAGED - DMA mappings managed by IOMMU-API user, used * for VMs * IOMMU_DOMAIN_DMA - Internally used for DMA-API implementations. * This flag allows IOMMU drivers to implement * certain optimizations for these domains * IOMMU_DOMAIN_DMA_FQ - As above, but definitely using batched TLB * invalidation. * IOMMU_DOMAIN_SVA - DMA addresses are shared process addresses * represented by mm_struct's. * IOMMU_DOMAIN_PLATFORM - Legacy domain for drivers that do their own * dma_api stuff. Do not use in new drivers. */#define IOMMU_DOMAIN_BLOCKED (0U)#define IOMMU_DOMAIN_IDENTITY (__IOMMU_DOMAIN_PT)#define IOMMU_DOMAIN_UNMANAGED (__IOMMU_DOMAIN_PAGING)#define IOMMU_DOMAIN_DMA (__IOMMU_DOMAIN_PAGING | \ __IOMMU_DOMAIN_DMA_API)#define IOMMU_DOMAIN_DMA_FQ (__IOMMU_DOMAIN_PAGING | \ __IOMMU_DOMAIN_DMA_API | \ __IOMMU_DOMAIN_DMA_FQ)#define IOMMU_DOMAIN_SVA (__IOMMU_DOMAIN_SVA)#define IOMMU_DOMAIN_PLATFORM (__IOMMU_DOMAIN_PLATFORM)#define IOMMU_DOMAIN_NESTED (__IOMMU_DOMAIN_NESTED)
struct iommu_domain { unsigned type; enum iommu_domain_cookie_type cookie_type; bool is_iommupt; const struct iommu_domain_ops *ops; const struct iommu_dirty_ops *dirty_ops; const struct iommu_ops *owner; /* Whose domain_alloc we came from */ unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */ struct iommu_domain_geometry geometry; int (*iopf_handler)(struct iopf_group *group);
union { /* cookie */ struct iommu_dma_cookie *iova_cookie; struct iommu_dma_msi_cookie *msi_cookie; struct iommufd_hw_pagetable *iommufd_hwpt; struct { iommu_fault_handler_t handler; void *handler_token; }; struct { /* IOMMU_DOMAIN_SVA */ struct mm_struct *mm; int users; /* * Next iommu_domain in mm->iommu_mm->sva-domains list * protected by iommu_sva_lock. */ struct list_head next; }; };};
static inline bool iommu_is_dma_domain(struct iommu_domain *domain){ return domain->type & __IOMMU_DOMAIN_DMA_API;}
enum iommu_cap { IOMMU_CAP_CACHE_COHERENCY, /* IOMMU_CACHE is supported */ IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */ IOMMU_CAP_PRE_BOOT_PROTECTION, /* Firmware says it used the IOMMU for DMA protection and we should too */ /* * Per-device flag indicating if enforce_cache_coherency() will work on * this device. */ IOMMU_CAP_ENFORCE_CACHE_COHERENCY, /* * IOMMU driver does not issue TLB maintenance during .unmap, so can * usefully support the non-strict DMA flush queue. */ IOMMU_CAP_DEFERRED_FLUSH, IOMMU_CAP_DIRTY_TRACKING, /* IOMMU supports dirty tracking */ /* ATS is supported and may be enabled for this device */ IOMMU_CAP_PCI_ATS_SUPPORTED,};
/* These are the possible reserved region types */enum iommu_resv_type { /* Memory regions which must be mapped 1:1 at all times */ IOMMU_RESV_DIRECT, /* * Memory regions which are advertised to be 1:1 but are * commonly considered relaxable in some conditions, * for instance in device assignment use case (USB, Graphics) */ IOMMU_RESV_DIRECT_RELAXABLE, /* Arbitrary "never map this or give it to a device" address ranges */ IOMMU_RESV_RESERVED, /* Hardware MSI region (untranslated) */ IOMMU_RESV_MSI, /* Software-managed MSI translation window */ IOMMU_RESV_SW_MSI,};
/** * struct iommu_resv_region - descriptor for a reserved memory region * @list: Linked list pointers * @start: System physical start address of the region * @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; phys_addr_t start; 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;};
#define IOMMU_NO_PASID (0U) /* Reserved for DMA w/o PASID */#define IOMMU_FIRST_GLOBAL_PASID (1U) /*starting range for allocation */#define IOMMU_PASID_INVALID (-1U)typedef unsigned int ioasid_t;
/* Read but do not clear any dirty bits */#define IOMMU_DIRTY_NO_CLEAR (1 << 0)
/* * Pages allocated through iommu_alloc_pages_node_sz() can be placed on this * list using iommu_pages_list_add(). Note: ONLY pages from * iommu_alloc_pages_node_sz() can be used this way! */struct iommu_pages_list { struct list_head pages;};
#define IOMMU_PAGES_LIST_INIT(name) \ ((struct iommu_pages_list){ .pages = LIST_HEAD_INIT(name.pages) })
#ifdef CONFIG_IOMMU_API
/** * struct iommu_iotlb_gather - Range information for a pending IOTLB flush * * This structure is intended to be updated by multiple calls to the * ->unmap() function in struct iommu_ops before eventually being passed * into ->iotlb_sync(). Drivers can add pages to @freelist to be freed after * ->iotlb_sync() or ->iotlb_flush_all() have cleared all cached references to * them. @queued is set to indicate when ->iotlb_flush_all() will be called * later instead of ->iotlb_sync(), so drivers may optimise accordingly. */struct iommu_iotlb_gather { /** @start: IOVA representing the start of the range to be flushed */ unsigned long start; /** * @end: IOVA representing the end of the range to be * flushed (inclusive) */ unsigned long end;
union { /** * @pgsize: The interval at which to perform the flush, only * used by arm-smmu-v3 */ size_t pgsize; struct { /** * @pt.leaf_levels_bitmap: Bitmap of generic_pt * levels where leaf entries were unmapped. Bit 0 * means the leaf only level. If 0 no leafs * were unmapped. */ u8 leaf_levels_bitmap; /** * @pt.table_levels_bitmap: Bitmap of generic_pt levels * of table entries that were removed. Bit 0 is never * set, bit 1 means a table of all leafs was removed. * When freelist is empty this must be 0. */ u8 table_levels_bitmap; } pt; };
/** * @freelist: Removed pages to free after sync, only used by * iommupt */ struct iommu_pages_list freelist; /** @queued: True if the gather will be completed with a flush all */ bool queued;};
/** * struct iommu_dirty_bitmap - Dirty IOVA bitmap state * @bitmap: IOVA bitmap * @gather: Range information for a pending IOTLB flush */struct iommu_dirty_bitmap { struct iova_bitmap *bitmap; struct iommu_iotlb_gather *gather;};
/** * struct iommu_dirty_ops - domain specific dirty tracking operations * @set_dirty_tracking: Enable or Disable dirty tracking on the iommu domain * @read_and_clear_dirty: Walk IOMMU page tables for dirtied PTEs marshalled * into a bitmap, with a bit represented as a page. * Reads the dirty PTE bits and clears it from IO * pagetables. */struct iommu_dirty_ops { int (*set_dirty_tracking)(struct iommu_domain *domain, bool enabled); int (*read_and_clear_dirty)(struct iommu_domain *domain, unsigned long iova, size_t size, unsigned long flags, struct iommu_dirty_bitmap *dirty);};
/** * struct iommu_user_data - iommu driver specific user space data info * @type: The data type of the user buffer * @uptr: Pointer to the user buffer for copy_from_user() * @len: The length of the user buffer in bytes * * A user space data is an uAPI that is defined in include/uapi/linux/iommufd.h * @type, @uptr and @len should be just copied from an iommufd core uAPI struct. */struct iommu_user_data { unsigned int type; void __user *uptr; size_t len;};
/** * struct iommu_user_data_array - iommu driver specific user space data array * @type: The data type of all the entries in the user buffer array * @uptr: Pointer to the user buffer array * @entry_len: The fixed-width length of an entry in the array, in bytes * @entry_num: The number of total entries in the array * * The user buffer includes an array of requests with format defined in * include/uapi/linux/iommufd.h */struct iommu_user_data_array { unsigned int type; void __user *uptr; size_t entry_len; u32 entry_num;};
/** * __iommu_copy_struct_from_user - Copy iommu driver specific user space data * @dst_data: Pointer to an iommu driver specific user data that is defined in * include/uapi/linux/iommufd.h * @src_data: Pointer to a struct iommu_user_data for user space data info * @data_type: The data type of the @dst_data. Must match with @src_data.type * @data_len: Length of current user data structure, i.e. sizeof(struct _dst) * @min_len: Initial length of user data structure for backward compatibility. * This should be offsetofend using the last member in the user data * struct that was initially added to include/uapi/linux/iommufd.h */static inline int __iommu_copy_struct_from_user( void *dst_data, const struct iommu_user_data *src_data, unsigned int data_type, size_t data_len, size_t min_len){ if (WARN_ON(!dst_data || !src_data)) return -EINVAL; if (src_data->type != data_type) return -EINVAL; if (src_data->len < min_len || data_len < src_data->len) return -EINVAL; return copy_struct_from_user(dst_data, data_len, src_data->uptr, src_data->len);}
/** * iommu_copy_struct_from_user - Copy iommu driver specific user space data * @kdst: Pointer to an iommu driver specific user data that is defined in * include/uapi/linux/iommufd.h * @user_data: Pointer to a struct iommu_user_data for user space data info * @data_type: The data type of the @kdst. Must match with @user_data->type * @min_last: The last member of the data structure @kdst points in the initial * version. * Return 0 for success, otherwise -error. */#define iommu_copy_struct_from_user(kdst, user_data, data_type, min_last) \ __iommu_copy_struct_from_user(kdst, user_data, data_type, \ sizeof(*kdst), \ offsetofend(typeof(*kdst), min_last))
/** * __iommu_copy_struct_from_user_array - Copy iommu driver specific user space * data from an iommu_user_data_array * @dst_data: Pointer to an iommu driver specific user data that is defined in * include/uapi/linux/iommufd.h * @src_array: Pointer to a struct iommu_user_data_array for a user space array * @data_type: The data type of the @dst_data. Must match with @src_array.type * @index: Index to the location in the array to copy user data from * @data_len: Length of current user data structure, i.e. sizeof(struct _dst) * @min_len: Initial length of user data structure for backward compatibility. * This should be offsetofend using the last member in the user data * struct that was initially added to include/uapi/linux/iommufd.h */static inline int __iommu_copy_struct_from_user_array( void *dst_data, const struct iommu_user_data_array *src_array, unsigned int data_type, unsigned int index, size_t data_len, size_t min_len){ struct iommu_user_data src_data;
if (WARN_ON(!src_array || index >= src_array->entry_num)) return -EINVAL; if (!src_array->entry_num) return -EINVAL; src_data.uptr = src_array->uptr + src_array->entry_len * index; src_data.len = src_array->entry_len; src_data.type = src_array->type;
return __iommu_copy_struct_from_user(dst_data, &src_data, data_type, data_len, min_len);}
/** * iommu_copy_struct_from_user_array - Copy iommu driver specific user space * data from an iommu_user_data_array * @kdst: Pointer to an iommu driver specific user data that is defined in * include/uapi/linux/iommufd.h * @user_array: Pointer to a struct iommu_user_data_array for a user space * array * @data_type: The data type of the @kdst. Must match with @user_array->type * @index: Index to the location in the array to copy user data from * @min_last: The last member of the data structure @kdst points in the * initial version. * * Copy a single entry from a user array. Return 0 for success, otherwise * -error. */#define iommu_copy_struct_from_user_array(kdst, user_array, data_type, index, \ min_last) \ __iommu_copy_struct_from_user_array( \ kdst, user_array, data_type, index, sizeof(*(kdst)), \ offsetofend(typeof(*(kdst)), min_last))
/** * iommu_copy_struct_from_full_user_array - Copy iommu driver specific user * space data from an iommu_user_data_array * @kdst: Pointer to an iommu driver specific user data that is defined in * include/uapi/linux/iommufd.h * @kdst_entry_size: sizeof(*kdst) * @user_array: Pointer to a struct iommu_user_data_array for a user space * array * @data_type: The data type of the @kdst. Must match with @user_array->type * * Copy the entire user array. kdst must have room for kdst_entry_size * * user_array->entry_num bytes. Return 0 for success, otherwise -error. */static inline intiommu_copy_struct_from_full_user_array(void *kdst, size_t kdst_entry_size, struct iommu_user_data_array *user_array, unsigned int data_type){ unsigned int i; int ret;
if (user_array->type != data_type) return -EINVAL; if (!user_array->entry_num) return -EINVAL; if (likely(user_array->entry_len == kdst_entry_size)) { if (copy_from_user(kdst, user_array->uptr, user_array->entry_num * user_array->entry_len)) return -EFAULT; return 0; }
/* Copy item by item */ for (i = 0; i != user_array->entry_num; i++) { ret = copy_struct_from_user( kdst + kdst_entry_size * i, kdst_entry_size, user_array->uptr + user_array->entry_len * i, user_array->entry_len); if (ret) return ret; } return 0;}
/** * __iommu_copy_struct_to_user - Report iommu driver specific user space data * @dst_data: Pointer to a struct iommu_user_data for user space data location * @src_data: Pointer to an iommu driver specific user data that is defined in * include/uapi/linux/iommufd.h * @data_type: The data type of the @src_data. Must match with @dst_data.type * @data_len: Length of current user data structure, i.e. sizeof(struct _src) * @min_len: Initial length of user data structure for backward compatibility. * This should be offsetofend using the last member in the user data * struct that was initially added to include/uapi/linux/iommufd.h */static inline int__iommu_copy_struct_to_user(const struct iommu_user_data *dst_data, void *src_data, unsigned int data_type, size_t data_len, size_t min_len){ if (WARN_ON(!dst_data || !src_data)) return -EINVAL; if (dst_data->type != data_type) return -EINVAL; if (dst_data->len < min_len || data_len < dst_data->len) return -EINVAL; return copy_struct_to_user(dst_data->uptr, dst_data->len, src_data, data_len, NULL);}
/** * iommu_copy_struct_to_user - Report iommu driver specific user space data * @user_data: Pointer to a struct iommu_user_data for user space data location * @ksrc: Pointer to an iommu driver specific user data that is defined in * include/uapi/linux/iommufd.h * @data_type: The data type of the @ksrc. Must match with @user_data->type * @min_last: The last member of the data structure @ksrc points in the initial * version. * Return 0 for success, otherwise -error. */#define iommu_copy_struct_to_user(user_data, ksrc, data_type, min_last) \ __iommu_copy_struct_to_user(user_data, ksrc, data_type, sizeof(*ksrc), \ offsetofend(typeof(*ksrc), min_last))
/** * struct iommu_ops - iommu ops and capabilities * @capable: check capability * @hw_info: report iommu hardware information. The data buffer returned by this * op is allocated in the iommu driver and freed by the caller after * use. @type can input a requested type and output a supported type. * Driver should reject an unsupported data @type input * @domain_alloc: Do not use in new drivers * @domain_alloc_identity: allocate an IDENTITY domain. Drivers should prefer to * use identity_domain instead. This should only be used * if dynamic logic is necessary. * @domain_alloc_paging_flags: Allocate an iommu domain corresponding to the * input parameters as defined in * include/uapi/linux/iommufd.h. The @user_data can be * optionally provided, the new domain must support * __IOMMU_DOMAIN_PAGING. Upon failure, ERR_PTR must be * returned. * @domain_alloc_paging: Allocate an iommu_domain that can be used for * UNMANAGED, DMA, and DMA_FQ domain types. This is the * same as invoking domain_alloc_paging_flags() with * @flags=0, @user_data=NULL. A driver should implement * only one of the two ops. * @domain_alloc_sva: Allocate an iommu_domain for Shared Virtual Addressing. * @domain_alloc_nested: Allocate an iommu_domain for nested translation. * @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 * @get_resv_regions: Request list of reserved regions for a device * @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) * @page_response: handle page request response * @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 * @get_viommu_size: Get the size of a driver-level vIOMMU structure for a given * @dev corresponding to @viommu_type. Driver should return 0 * if vIOMMU isn't supported accordingly. It is required for * driver to use the VIOMMU_STRUCT_SIZE macro to sanitize the * driver-level vIOMMU structure related to the core one * @viommu_init: Init the driver-level struct of an iommufd_viommu on a physical * IOMMU instance @viommu->iommu_dev, as the set of virtualization * resources shared/passed to user space IOMMU instance. Associate * it with a nesting @parent_domain. It is required for driver to * set @viommu->ops pointing to its own viommu_ops * @owner: Driver module providing these ops * @identity_domain: An always available, always attachable identity * translation. * @blocked_domain: An always available, always attachable blocking * translation. * @default_domain: If not NULL this will always be set as the default domain. * This should be an IDENTITY/BLOCKED/PLATFORM domain. * Do not use in new drivers. * @user_pasid_table: IOMMU driver supports user-managed PASID table. There is * no user domain for each PASID and the I/O page faults are * forwarded through the user domain attached to the device * RID. */struct iommu_ops { bool (*capable)(struct device *dev, enum iommu_cap); void *(*hw_info)(struct device *dev, u32 *length, enum iommu_hw_info_type *type);
/* Domain allocation and freeing by the iommu driver */#if IS_ENABLED(CONFIG_FSL_PAMU) struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);#endif struct iommu_domain *(*domain_alloc_identity)(struct device *dev); struct iommu_domain *(*domain_alloc_paging_flags)( struct device *dev, u32 flags, const struct iommu_user_data *user_data); struct iommu_domain *(*domain_alloc_paging)(struct device *dev); struct iommu_domain *(*domain_alloc_sva)(struct device *dev, struct mm_struct *mm); struct iommu_domain *(*domain_alloc_nested)( struct device *dev, struct iommu_domain *parent, u32 flags, const struct iommu_user_data *user_data);
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);
/* 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, const struct of_phandle_args *args); bool (*is_attach_deferred)(struct device *dev);
/* Per device IOMMU features */ void (*page_response)(struct device *dev, struct iopf_fault *evt, struct iommu_page_response *msg);
int (*def_domain_type)(struct device *dev);
size_t (*get_viommu_size)(struct device *dev, enum iommu_viommu_type viommu_type); int (*viommu_init)(struct iommufd_viommu *viommu, struct iommu_domain *parent_domain, const struct iommu_user_data *user_data);
const struct iommu_domain_ops *default_domain_ops; struct module *owner; struct iommu_domain *identity_domain; struct iommu_domain *blocked_domain; struct iommu_domain *release_domain; struct iommu_domain *default_domain; u8 user_pasid_table:1;};
/** * struct iommu_domain_ops - domain specific operations * @attach_dev: attach an iommu domain to a device * Return: * * 0 - success * * EINVAL - can indicate that device and domain are incompatible due to * some previous configuration of the domain, in which case the * driver shouldn't log an error, since it is legitimate for a * caller to test reuse of existing domains. Otherwise, it may * still represent some other fundamental problem * * ENOMEM - out of memory * * ENOSPC - non-ENOMEM type of resource allocation failures * * EBUSY - device is attached to a domain and cannot be changed * * ENODEV - device specific errors, not able to be attached * * <others> - treated as ENODEV by the caller. Use is discouraged * @set_dev_pasid: set or replace an iommu domain to a pasid of device. The pasid of * the device should be left in the old config in error case. * @map_pages: map a physically contiguous set of pages of the same size to * 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 * @cache_invalidate_user: Flush hardware cache for user space IO page table. * The @domain must be IOMMU_DOMAIN_NESTED. The @array * passes in the cache invalidation requests, in form * of a driver data structure. The driver must update * array->entry_num to report the number of handled * invalidation requests. The driver data structure * must be defined in include/uapi/linux/iommufd.h * @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. * @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, struct iommu_domain *old); int (*set_dev_pasid)(struct iommu_domain *domain, struct device *dev, ioasid_t pasid, struct iommu_domain *old);
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_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); int (*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); int (*cache_invalidate_user)(struct iommu_domain *domain, struct iommu_user_data_array *array);
phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
bool (*enforce_cache_coherency)(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 * @ops: iommu-ops for talking to this iommu * @dev: struct device for sysfs handling * @singleton_group: Used internally for drivers that have only one group * @max_pasids: number of supported PASIDs * @ready: set once iommu_device_register() has completed successfully */struct iommu_device { struct list_head list; const struct iommu_ops *ops; struct fwnode_handle *fwnode; struct device *dev; struct iommu_group *singleton_group; u32 max_pasids; bool ready;};
/** * struct iommu_fault_param - per-device IOMMU fault data * @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 { 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 * @fwspec: IOMMU fwspec data * @iommu_dev: IOMMU device this device is linked to * @priv: IOMMU Driver private data * @max_pasids: number of PASIDs this device can consume * @attach_deferred: the dma domain attachment is deferred * @pci_32bit_workaround: Limit DMA allocations to 32-bit IOVAs * @require_direct: device requires IOMMU_RESV_DIRECT regions * @shadow_on_flush: IOTLB flushes are used to sync shadow tables * * TODO: migrate other per device data pointers under iommu_dev_data, e.g. * struct iommu_group *iommu_group; */struct dev_iommu { struct mutex lock; struct iommu_fault_param __rcu *fault_param; struct iommu_fwspec *fwspec; struct iommu_device *iommu_dev; void *priv; u32 max_pasids; u32 attach_deferred:1; u32 pci_32bit_workaround:1; u32 require_direct:1; u32 shadow_on_flush:1;};
int iommu_device_register(struct iommu_device *iommu, const struct iommu_ops *ops, struct device *hwdev);void iommu_device_unregister(struct iommu_device *iommu);int iommu_device_sysfs_add(struct iommu_device *iommu, struct device *parent, const struct attribute_group **groups, const char *fmt, ...) __printf(4, 5);void iommu_device_sysfs_remove(struct iommu_device *iommu);int iommu_device_link(struct iommu_device *iommu, struct device *link);void iommu_device_unlink(struct iommu_device *iommu, struct device *link);int iommu_deferred_attach(struct device *dev, struct iommu_domain *domain);
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) { .start = ULONG_MAX, .freelist = IOMMU_PAGES_LIST_INIT(gather->freelist), };}
extern bool device_iommu_capable(struct device *dev, enum iommu_cap cap);extern bool iommu_group_has_isolated_msi(struct iommu_group *group);struct iommu_domain *iommu_paging_domain_alloc_flags(struct device *dev, unsigned int flags);static inline struct iommu_domain *iommu_paging_domain_alloc(struct device *dev){ return iommu_paging_domain_alloc_flags(dev, 0);}extern void iommu_domain_free(struct iommu_domain *domain);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 struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);struct iommu_domain *iommu_driver_get_domain_for_dev(struct device *dev);extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);extern int iommu_map(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot, gfp_t gfp);int iommu_map_nosync(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot, gfp_t gfp);int iommu_sync_map(struct iommu_domain *domain, unsigned long iova, size_t size);extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size);extern size_t iommu_unmap_fast(struct iommu_domain *domain, unsigned long iova, size_t size, struct iommu_iotlb_gather *iotlb_gather);extern ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, struct scatterlist *sg, unsigned int nents, int prot, gfp_t gfp);extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);extern void iommu_set_fault_handler(struct iommu_domain *domain, iommu_fault_handler_t handler, void *token);
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 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, gfp_t gfp);extern int iommu_get_group_resv_regions(struct iommu_group *group, struct list_head *head);
extern int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group);extern void iommu_detach_group(struct iommu_domain *domain, struct iommu_group *group);extern struct iommu_group *iommu_group_alloc(void);extern void *iommu_group_get_iommudata(struct iommu_group *group);extern void iommu_group_set_iommudata(struct iommu_group *group, void *iommu_data, void (*release)(void *iommu_data));extern int iommu_group_set_name(struct iommu_group *group, const char *name);extern int iommu_group_add_device(struct iommu_group *group, struct device *dev);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_id(struct iommu_group *group);extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
int iommu_set_pgtable_quirks(struct iommu_domain *domain, unsigned long quirks);
void iommu_set_dma_strict(void);
extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev, unsigned long iova, int flags);
static inline void iommu_flush_iotlb_all(struct iommu_domain *domain){ if (domain->ops->flush_iotlb_all) domain->ops->flush_iotlb_all(domain);}
static inline void iommu_iotlb_sync(struct iommu_domain *domain, struct iommu_iotlb_gather *iotlb_gather){ if (domain->ops->iotlb_sync && likely(iotlb_gather->start < iotlb_gather->end)) domain->ops->iotlb_sync(domain, iotlb_gather);
iommu_iotlb_gather_init(iotlb_gather);}
/** * iommu_iotlb_gather_is_disjoint - Checks whether a new range is disjoint * * @gather: TLB gather data * @iova: start of page to invalidate * @size: size of page to invalidate * * Helper for IOMMU drivers to check whether a new range and the gathered range * are disjoint. For many IOMMUs, flushing the IOMMU in this case is better * than merging the two, which might lead to unnecessary invalidations. */static inlinebool iommu_iotlb_gather_is_disjoint(struct iommu_iotlb_gather *gather, unsigned long iova, size_t size){ unsigned long start = iova, end = start + size - 1;
return gather->end != 0 && (end + 1 < gather->start || start > gather->end + 1);}
/** * iommu_iotlb_gather_add_range - Gather for address-based TLB invalidation * @gather: TLB gather data * @iova: start of page to invalidate * @size: size of page to invalidate * * Helper for IOMMU drivers to build arbitrarily-sized invalidation commands * where only the address range matters, and simply minimising intermediate * syncs is preferred. */static inline void iommu_iotlb_gather_add_range(struct iommu_iotlb_gather *gather, unsigned long iova, size_t size){ unsigned long end = iova + size - 1;
if (gather->start > iova) gather->start = iova; if (gather->end < end) gather->end = end;}
/** * iommu_iotlb_gather_add_page - Gather for page-based TLB invalidation * @domain: IOMMU domain to be invalidated * @gather: TLB gather data * @iova: start of page to invalidate * @size: size of page to invalidate * * Helper for IOMMU drivers to build invalidation commands based on individual * pages, or with page size/table level hints which cannot be gathered if they * differ. */static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain, struct iommu_iotlb_gather *gather, unsigned long iova, size_t size){ /* * If the new page is disjoint from the current range or is mapped at * a different granularity, then sync the TLB so that the gather * structure can be rewritten. */ if ((gather->pgsize && gather->pgsize != size) || iommu_iotlb_gather_is_disjoint(gather, iova, size)) iommu_iotlb_sync(domain, gather);
gather->pgsize = size; iommu_iotlb_gather_add_range(gather, iova, size);}
static inline bool iommu_iotlb_gather_queued(struct iommu_iotlb_gather *gather){ return gather && gather->queued;}
static inline void iommu_dirty_bitmap_init(struct iommu_dirty_bitmap *dirty, struct iova_bitmap *bitmap, struct iommu_iotlb_gather *gather){ if (gather) iommu_iotlb_gather_init(gather);
dirty->bitmap = bitmap; dirty->gather = gather;}
static inline void iommu_dirty_bitmap_record(struct iommu_dirty_bitmap *dirty, unsigned long iova, unsigned long length){ if (dirty->bitmap) iova_bitmap_set(dirty->bitmap, iova, length);
if (dirty->gather) iommu_iotlb_gather_add_range(dirty->gather, iova, length);}
/* PCI device grouping function */extern struct iommu_group *pci_device_group(struct device *dev);/* Generic device grouping function */extern struct iommu_group *generic_device_group(struct device *dev);/* FSL-MC device grouping function */struct iommu_group *fsl_mc_device_group(struct device *dev);extern struct iommu_group *generic_single_device_group(struct device *dev);
/** * struct iommu_fwspec - per-device IOMMU instance data * @iommu_fwnode: firmware handle for this device's IOMMU * @flags: IOMMU_FWSPEC_* flags * @num_ids: number of associated device IDs * @ids: IDs which this device may present to the IOMMU * * Note that the IDs (and any other information, really) stored in this structure should be * considered private to the IOMMU device driver and are not to be used directly by IOMMU * consumers. */struct iommu_fwspec { struct fwnode_handle *iommu_fwnode; u32 flags; unsigned int num_ids; u32 ids[];};
/* ATS is supported */#define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)/* CANWBS is supported */#define IOMMU_FWSPEC_PCI_RC_CANWBS (1 << 1)
/* * An iommu attach handle represents a relationship between an iommu domain * and a PASID or RID of a device. It is allocated and managed by the component * that manages the domain and is stored in the iommu group during the time the * domain is attached. */struct iommu_attach_handle { struct iommu_domain *domain;};
/** * struct iommu_sva - handle to a device-mm bond */struct iommu_sva { struct iommu_attach_handle handle; struct device *dev; refcount_t users;};
struct iommu_mm_data { u32 pasid; struct mm_struct *mm; struct list_head sva_domains; struct list_head mm_list_elm;};
int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode);int iommu_fwspec_add_ids(struct device *dev, const u32 *ids, int num_ids);
static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev){ if (dev->iommu) return dev->iommu->fwspec; else return NULL;}
static inline void dev_iommu_fwspec_set(struct device *dev, struct iommu_fwspec *fwspec){ dev->iommu->fwspec = fwspec;}
static inline void *dev_iommu_priv_get(struct device *dev){ if (dev->iommu) return dev->iommu->priv; else return NULL;}
void dev_iommu_priv_set(struct device *dev, void *priv);
extern struct mutex iommu_probe_device_lock;int iommu_probe_device(struct device *dev);
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);
int iommu_device_claim_dma_owner(struct device *dev, void *owner);void iommu_device_release_dma_owner(struct device *dev);
int iommu_attach_device_pasid(struct iommu_domain *domain, struct device *dev, ioasid_t pasid, struct iommu_attach_handle *handle);void iommu_detach_device_pasid(struct iommu_domain *domain, struct device *dev, ioasid_t pasid);ioasid_t iommu_alloc_global_pasid(struct device *dev);void iommu_free_global_pasid(ioasid_t pasid);
/* PCI device reset functions */int pci_dev_reset_iommu_prepare(struct pci_dev *pdev);void pci_dev_reset_iommu_done(struct pci_dev *pdev);#else /* CONFIG_IOMMU_API */
struct iommu_ops {};struct iommu_group {};struct iommu_fwspec {};struct iommu_device {};struct iommu_fault_param {};struct iommu_iotlb_gather {};struct iommu_dirty_bitmap {};struct iommu_dirty_ops {};
static inline bool device_iommu_capable(struct device *dev, enum iommu_cap cap){ return false;}
static inline struct iommu_domain *iommu_paging_domain_alloc_flags(struct device *dev, unsigned int flags){ return ERR_PTR(-ENODEV);}
static inline struct iommu_domain *iommu_paging_domain_alloc(struct device *dev){ return ERR_PTR(-ENODEV);}
static inline void iommu_domain_free(struct iommu_domain *domain){}
static inline int iommu_attach_device(struct iommu_domain *domain, struct device *dev){ return -ENODEV;}
static inline void iommu_detach_device(struct iommu_domain *domain, struct device *dev){}
static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev){ return NULL;}
static inline int iommu_map(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot, gfp_t gfp){ return -ENODEV;}
static inline size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size){ return 0;}
static inline size_t iommu_unmap_fast(struct iommu_domain *domain, unsigned long iova, int gfp_order, struct iommu_iotlb_gather *iotlb_gather){ return 0;}
static inline ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, struct scatterlist *sg, unsigned int nents, int prot, gfp_t gfp){ return -ENODEV;}
static inline void iommu_flush_iotlb_all(struct iommu_domain *domain){}
static inline void iommu_iotlb_sync(struct iommu_domain *domain, struct iommu_iotlb_gather *iotlb_gather){}
static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova){ return 0;}
static inline void iommu_set_fault_handler(struct iommu_domain *domain, iommu_fault_handler_t handler, void *token){}
static inline void iommu_get_resv_regions(struct device *dev, struct list_head *list){}
static inline void iommu_put_resv_regions(struct device *dev, struct list_head *list){}
static inline int iommu_get_group_resv_regions(struct iommu_group *group, struct list_head *head){ return -ENODEV;}
static inline void iommu_set_default_passthrough(bool cmd_line){}
static inline void iommu_set_default_translated(bool cmd_line){}
static inline bool iommu_default_passthrough(void){ return true;}
static inline int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group){ return -ENODEV;}
static inline void iommu_detach_group(struct iommu_domain *domain, struct iommu_group *group){}
static inline struct iommu_group *iommu_group_alloc(void){ return ERR_PTR(-ENODEV);}
static inline void *iommu_group_get_iommudata(struct iommu_group *group){ return NULL;}
static inline void iommu_group_set_iommudata(struct iommu_group *group, void *iommu_data, void (*release)(void *iommu_data)){}
static inline int iommu_group_set_name(struct iommu_group *group, const char *name){ return -ENODEV;}
static inline int iommu_group_add_device(struct iommu_group *group, struct device *dev){ return -ENODEV;}
static inline void iommu_group_remove_device(struct device *dev){}
static inline int iommu_group_for_each_dev(struct iommu_group *group, void *data, int (*fn)(struct device *, void *)){ return -ENODEV;}
static inline struct iommu_group *iommu_group_get(struct device *dev){ return NULL;}
static inline void iommu_group_put(struct iommu_group *group){}
static inline int iommu_group_id(struct iommu_group *group){ return -ENODEV;}
static inline int iommu_set_pgtable_quirks(struct iommu_domain *domain, unsigned long quirks){ return 0;}
static inline int iommu_device_register(struct iommu_device *iommu, const struct iommu_ops *ops, struct device *hwdev){ return -ENODEV;}
static inline struct iommu_device *dev_to_iommu_device(struct device *dev){ return NULL;}
static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather){}
static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain, struct iommu_iotlb_gather *gather, unsigned long iova, size_t size){}
static inline bool iommu_iotlb_gather_queued(struct iommu_iotlb_gather *gather){ return false;}
static inline void iommu_dirty_bitmap_init(struct iommu_dirty_bitmap *dirty, struct iova_bitmap *bitmap, struct iommu_iotlb_gather *gather){}
static inline void iommu_dirty_bitmap_record(struct iommu_dirty_bitmap *dirty, unsigned long iova, unsigned long length){}
static inline void iommu_device_unregister(struct iommu_device *iommu){}
static inline int iommu_device_sysfs_add(struct iommu_device *iommu, struct device *parent, const struct attribute_group **groups, const char *fmt, ...){ return -ENODEV;}
static inline void iommu_device_sysfs_remove(struct iommu_device *iommu){}
static inline int iommu_device_link(struct device *dev, struct device *link){ return -EINVAL;}
static inline void iommu_device_unlink(struct device *dev, struct device *link){}
static inline int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode){ return -ENODEV;}
static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids){ return -ENODEV;}
static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev){ return NULL;}
static inline int iommu_device_use_default_domain(struct device *dev){ return 0;}
static inline void iommu_device_unuse_default_domain(struct device *dev){}
static inline intiommu_group_claim_dma_owner(struct iommu_group *group, void *owner){ return -ENODEV;}
static inline void iommu_group_release_dma_owner(struct iommu_group *group){}
static inline bool iommu_group_dma_owner_claimed(struct iommu_group *group){ return false;}
static inline void iommu_device_release_dma_owner(struct device *dev){}
static inline int iommu_device_claim_dma_owner(struct device *dev, void *owner){ return -ENODEV;}
static inline int iommu_attach_device_pasid(struct iommu_domain *domain, struct device *dev, ioasid_t pasid, struct iommu_attach_handle *handle){ return -ENODEV;}
static inline void iommu_detach_device_pasid(struct iommu_domain *domain, struct device *dev, ioasid_t pasid){}
static inline ioasid_t iommu_alloc_global_pasid(struct device *dev){ return IOMMU_PASID_INVALID;}
static inline void iommu_free_global_pasid(ioasid_t pasid) {}
static inline int pci_dev_reset_iommu_prepare(struct pci_dev *pdev){ return 0;}
static inline void pci_dev_reset_iommu_done(struct pci_dev *pdev){}#endif /* CONFIG_IOMMU_API */
#ifdef CONFIG_IRQ_MSI_IOMMU#ifdef CONFIG_IOMMU_APIint iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr);#elsestatic inline int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr){ return 0;}#endif /* CONFIG_IOMMU_API */#endif /* CONFIG_IRQ_MSI_IOMMU */
#if IS_ENABLED(CONFIG_LOCKDEP) && IS_ENABLED(CONFIG_IOMMU_API)void iommu_group_mutex_assert(struct device *dev);#elsestatic 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 * @iova: The start address to map the buffer * @sgt: The sg_table object describing the buffer * @prot: IOMMU protection bits * * Creates a mapping at @iova for the buffer described by a scatterlist * stored in the given sg_table object in the provided IOMMU domain. */static inline ssize_t iommu_map_sgtable(struct iommu_domain *domain, unsigned long iova, struct sg_table *sgt, int prot){ return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot, GFP_KERNEL);}
#ifdef CONFIG_IOMMU_DEBUGFSextern struct dentry *iommu_debugfs_dir;void iommu_debugfs_setup(void);#elsestatic inline void iommu_debugfs_setup(void) {}#endif
#ifdef CONFIG_IOMMU_DMAint iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base);#else /* CONFIG_IOMMU_DMA */static inline int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base){ return -ENODEV;}#endif /* CONFIG_IOMMU_DMA */
/* * Newer generations of Tegra SoCs require devices' stream IDs to be directly programmed into * some registers. These are always paired with a Tegra SMMU or ARM SMMU, for which the contents * of the struct iommu_fwspec are known. Use this helper to formalize access to these internals. */#define TEGRA_STREAM_ID_BYPASS 0x7f
static inline bool tegra_dev_iommu_get_stream_id(struct device *dev, u32 *stream_id){#ifdef CONFIG_IOMMU_API struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
if (fwspec && fwspec->num_ids == 1) { *stream_id = fwspec->ids[0] & 0xffff; return true; }#endif
return false;}
#ifdef CONFIG_IOMMU_MM_DATAstatic inline void mm_pasid_init(struct mm_struct *mm){ /* * During dup_mm(), a new mm will be memcpy'd from an old one and that makes * the new mm and the old one point to a same iommu_mm instance. When either * one of the two mms gets released, the iommu_mm instance is freed, leaving * the other mm running into a use-after-free/double-free problem. To avoid * the problem, zeroing the iommu_mm pointer of a new mm is needed here. */ mm->iommu_mm = NULL;}
static inline bool mm_valid_pasid(struct mm_struct *mm){ return READ_ONCE(mm->iommu_mm);}
static inline u32 mm_get_enqcmd_pasid(struct mm_struct *mm){ struct iommu_mm_data *iommu_mm = READ_ONCE(mm->iommu_mm);
if (!iommu_mm) return IOMMU_PASID_INVALID; return iommu_mm->pasid;}
void mm_pasid_drop(struct mm_struct *mm);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);void iommu_sva_invalidate_kva_range(unsigned long start, unsigned long end);#elsestatic inline struct iommu_sva *iommu_sva_bind_device(struct device *dev, struct mm_struct *mm){ return ERR_PTR(-ENODEV);}
static inline void iommu_sva_unbind_device(struct iommu_sva *handle){}
static inline u32 iommu_sva_get_pasid(struct iommu_sva *handle){ return IOMMU_PASID_INVALID;}static inline void mm_pasid_init(struct mm_struct *mm) {}static inline bool mm_valid_pasid(struct mm_struct *mm) { return false; }
static inline u32 mm_get_enqcmd_pasid(struct mm_struct *mm){ return IOMMU_PASID_INVALID;}
static inline void mm_pasid_drop(struct mm_struct *mm) {}static inline void iommu_sva_invalidate_kva_range(unsigned long start, unsigned long end) {}#endif /* CONFIG_IOMMU_SVA */
#ifdef CONFIG_IOMMU_IOPFint 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);int 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);#elsestatic inline intiopf_queue_add_device(struct iopf_queue *queue, struct device *dev){ return -ENODEV;}
static inline voidiopf_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 intiommu_report_device_fault(struct device *dev, struct iopf_fault *evt){ return -ENODEV;}
static inline void iopf_group_response(struct iopf_group *group, enum iommu_page_response_code status){}#endif /* CONFIG_IOMMU_IOPF */#endif /* __LINUX_IOMMU_H */