1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
4 * Author: Joerg Roedel <joerg.roedel@amd.com>
7 #ifndef __LINUX_IOMMU_H
8 #define __LINUX_IOMMU_H
10 #include <linux/scatterlist.h>
11 #include <linux/device.h>
12 #include <linux/types.h>
13 #include <linux/errno.h>
14 #include <linux/err.h>
16 #include <linux/ioasid.h>
17 #include <uapi/linux/iommu.h>
19 #define IOMMU_READ (1 << 0)
20 #define IOMMU_WRITE (1 << 1)
21 #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */
22 #define IOMMU_NOEXEC (1 << 3)
23 #define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */
25 * Where the bus hardware includes a privilege level as part of its access type
26 * markings, and certain devices are capable of issuing transactions marked as
27 * either 'supervisor' or 'user', the IOMMU_PRIV flag requests that the other
28 * given permission flags only apply to accesses at the higher privilege level,
29 * and that unprivileged transactions should have as little access as possible.
30 * This would usually imply the same permissions as kernel mappings on the CPU,
31 * if the IOMMU page table format is equivalent.
33 #define IOMMU_PRIV (1 << 5)
40 struct notifier_block;
42 struct iommu_fault_event;
43 struct iommu_dma_cookie;
45 /* iommu fault flags */
46 #define IOMMU_FAULT_READ 0x0
47 #define IOMMU_FAULT_WRITE 0x1
49 typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
50 struct device *, unsigned long, int, void *);
51 typedef int (*iommu_dev_fault_handler_t)(struct iommu_fault *, void *);
53 struct iommu_domain_geometry {
54 dma_addr_t aperture_start; /* First address that can be mapped */
55 dma_addr_t aperture_end; /* Last address that can be mapped */
56 bool force_aperture; /* DMA only allowed in mappable range? */
59 /* Domain feature flags */
60 #define __IOMMU_DOMAIN_PAGING (1U << 0) /* Support for iommu_map/unmap */
61 #define __IOMMU_DOMAIN_DMA_API (1U << 1) /* Domain for use in DMA-API
63 #define __IOMMU_DOMAIN_PT (1U << 2) /* Domain is identity mapped */
64 #define __IOMMU_DOMAIN_DMA_FQ (1U << 3) /* DMA-API uses flush queue */
67 * This are the possible domain-types
69 * IOMMU_DOMAIN_BLOCKED - All DMA is blocked, can be used to isolate
71 * IOMMU_DOMAIN_IDENTITY - DMA addresses are system physical addresses
72 * IOMMU_DOMAIN_UNMANAGED - DMA mappings managed by IOMMU-API user, used
74 * IOMMU_DOMAIN_DMA - Internally used for DMA-API implementations.
75 * This flag allows IOMMU drivers to implement
76 * certain optimizations for these domains
77 * IOMMU_DOMAIN_DMA_FQ - As above, but definitely using batched TLB
80 #define IOMMU_DOMAIN_BLOCKED (0U)
81 #define IOMMU_DOMAIN_IDENTITY (__IOMMU_DOMAIN_PT)
82 #define IOMMU_DOMAIN_UNMANAGED (__IOMMU_DOMAIN_PAGING)
83 #define IOMMU_DOMAIN_DMA (__IOMMU_DOMAIN_PAGING | \
84 __IOMMU_DOMAIN_DMA_API)
85 #define IOMMU_DOMAIN_DMA_FQ (__IOMMU_DOMAIN_PAGING | \
86 __IOMMU_DOMAIN_DMA_API | \
87 __IOMMU_DOMAIN_DMA_FQ)
91 const struct iommu_ops *ops;
92 unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */
93 iommu_fault_handler_t handler;
95 struct iommu_domain_geometry geometry;
96 struct iommu_dma_cookie *iova_cookie;
99 static inline bool iommu_is_dma_domain(struct iommu_domain *domain)
101 return domain->type & __IOMMU_DOMAIN_DMA_API;
105 IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA
107 IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */
108 IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */
111 /* These are the possible reserved region types */
112 enum iommu_resv_type {
113 /* Memory regions which must be mapped 1:1 at all times */
116 * Memory regions which are advertised to be 1:1 but are
117 * commonly considered relaxable in some conditions,
118 * for instance in device assignment use case (USB, Graphics)
120 IOMMU_RESV_DIRECT_RELAXABLE,
121 /* Arbitrary "never map this or give it to a device" address ranges */
123 /* Hardware MSI region (untranslated) */
125 /* Software-managed MSI translation window */
130 * struct iommu_resv_region - descriptor for a reserved memory region
131 * @list: Linked list pointers
132 * @start: System physical start address of the region
133 * @length: Length of the region in bytes
134 * @prot: IOMMU Protection flags (READ/WRITE/...)
135 * @type: Type of the reserved region
137 struct iommu_resv_region {
138 struct list_head list;
142 enum iommu_resv_type type;
146 * enum iommu_dev_features - Per device IOMMU features
147 * @IOMMU_DEV_FEAT_AUX: Auxiliary domain feature
148 * @IOMMU_DEV_FEAT_SVA: Shared Virtual Addresses
149 * @IOMMU_DEV_FEAT_IOPF: I/O Page Faults such as PRI or Stall. Generally
150 * enabling %IOMMU_DEV_FEAT_SVA requires
151 * %IOMMU_DEV_FEAT_IOPF, but some devices manage I/O Page
152 * Faults themselves instead of relying on the IOMMU. When
153 * supported, this feature must be enabled before and
154 * disabled after %IOMMU_DEV_FEAT_SVA.
156 * Device drivers query whether a feature is supported using
157 * iommu_dev_has_feature(), and enable it using iommu_dev_enable_feature().
159 enum iommu_dev_features {
165 #define IOMMU_PASID_INVALID (-1U)
167 #ifdef CONFIG_IOMMU_API
170 * struct iommu_iotlb_gather - Range information for a pending IOTLB flush
172 * @start: IOVA representing the start of the range to be flushed
173 * @end: IOVA representing the end of the range to be flushed (inclusive)
174 * @pgsize: The interval at which to perform the flush
175 * @freelist: Removed pages to free after sync
176 * @queued: Indicates that the flush will be queued
178 * This structure is intended to be updated by multiple calls to the
179 * ->unmap() function in struct iommu_ops before eventually being passed
180 * into ->iotlb_sync(). Drivers can add pages to @freelist to be freed after
181 * ->iotlb_sync() or ->iotlb_flush_all() have cleared all cached references to
182 * them. @queued is set to indicate when ->iotlb_flush_all() will be called
183 * later instead of ->iotlb_sync(), so drivers may optimise accordingly.
185 struct iommu_iotlb_gather {
189 struct list_head freelist;
194 * struct iommu_ops - iommu ops and capabilities
195 * @capable: check capability
196 * @domain_alloc: allocate iommu domain
197 * @domain_free: free iommu domain
198 * @attach_dev: attach device to an iommu domain
199 * @detach_dev: detach device from an iommu domain
200 * @map: map a physically contiguous memory region to an iommu domain
201 * @map_pages: map a physically contiguous set of pages of the same size to
203 * @unmap: unmap a physically contiguous memory region from an iommu domain
204 * @unmap_pages: unmap a number of pages of the same size from an iommu domain
205 * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain
206 * @iotlb_sync_map: Sync mappings created recently using @map to the hardware
207 * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
209 * @iova_to_phys: translate iova to physical address
210 * @probe_device: Add device to iommu driver handling
211 * @release_device: Remove device from iommu driver handling
212 * @probe_finalize: Do final setup work after the device is added to an IOMMU
213 * group and attached to the groups domain
214 * @device_group: find iommu group for a particular device
215 * @enable_nesting: Enable nesting
216 * @set_pgtable_quirks: Set io page table quirks (IO_PGTABLE_QUIRK_*)
217 * @get_resv_regions: Request list of reserved regions for a device
218 * @put_resv_regions: Free list of reserved regions for a device
219 * @apply_resv_region: Temporary helper call-back for iova reserved ranges
220 * @of_xlate: add OF master IDs to iommu grouping
221 * @is_attach_deferred: Check if domain attach should be deferred from iommu
222 * driver init to device driver init (default no)
223 * @dev_has/enable/disable_feat: per device entries to check/enable/disable
224 * iommu specific features.
225 * @dev_feat_enabled: check enabled feature
226 * @aux_attach/detach_dev: aux-domain specific attach/detach entries.
227 * @aux_get_pasid: get the pasid given an aux-domain
228 * @sva_bind: Bind process address space to device
229 * @sva_unbind: Unbind process address space from device
230 * @sva_get_pasid: Get PASID associated to a SVA handle
231 * @page_response: handle page request response
232 * @cache_invalidate: invalidate translation caches
233 * @sva_bind_gpasid: bind guest pasid and mm
234 * @sva_unbind_gpasid: unbind guest pasid and mm
235 * @def_domain_type: device default domain type, return value:
236 * - IOMMU_DOMAIN_IDENTITY: must use an identity domain
237 * - IOMMU_DOMAIN_DMA: must use a dma domain
238 * - 0: use the default setting
239 * @pgsize_bitmap: bitmap of all possible supported page sizes
240 * @owner: Driver module providing these ops
243 bool (*capable)(enum iommu_cap);
245 /* Domain allocation and freeing by the iommu driver */
246 struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);
247 void (*domain_free)(struct iommu_domain *);
249 int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
250 void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
251 int (*map)(struct iommu_domain *domain, unsigned long iova,
252 phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
253 int (*map_pages)(struct iommu_domain *domain, unsigned long iova,
254 phys_addr_t paddr, size_t pgsize, size_t pgcount,
255 int prot, gfp_t gfp, size_t *mapped);
256 size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
257 size_t size, struct iommu_iotlb_gather *iotlb_gather);
258 size_t (*unmap_pages)(struct iommu_domain *domain, unsigned long iova,
259 size_t pgsize, size_t pgcount,
260 struct iommu_iotlb_gather *iotlb_gather);
261 void (*flush_iotlb_all)(struct iommu_domain *domain);
262 void (*iotlb_sync_map)(struct iommu_domain *domain, unsigned long iova,
264 void (*iotlb_sync)(struct iommu_domain *domain,
265 struct iommu_iotlb_gather *iotlb_gather);
266 phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
267 struct iommu_device *(*probe_device)(struct device *dev);
268 void (*release_device)(struct device *dev);
269 void (*probe_finalize)(struct device *dev);
270 struct iommu_group *(*device_group)(struct device *dev);
271 int (*enable_nesting)(struct iommu_domain *domain);
272 int (*set_pgtable_quirks)(struct iommu_domain *domain,
273 unsigned long quirks);
275 /* Request/Free a list of reserved regions for a device */
276 void (*get_resv_regions)(struct device *dev, struct list_head *list);
277 void (*put_resv_regions)(struct device *dev, struct list_head *list);
278 void (*apply_resv_region)(struct device *dev,
279 struct iommu_domain *domain,
280 struct iommu_resv_region *region);
282 int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
283 bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev);
285 /* Per device IOMMU features */
286 bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f);
287 bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f);
288 int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
289 int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
291 /* Aux-domain specific attach/detach entries */
292 int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev);
293 void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev);
294 int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev);
296 struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm,
298 void (*sva_unbind)(struct iommu_sva *handle);
299 u32 (*sva_get_pasid)(struct iommu_sva *handle);
301 int (*page_response)(struct device *dev,
302 struct iommu_fault_event *evt,
303 struct iommu_page_response *msg);
304 int (*cache_invalidate)(struct iommu_domain *domain, struct device *dev,
305 struct iommu_cache_invalidate_info *inv_info);
306 int (*sva_bind_gpasid)(struct iommu_domain *domain,
307 struct device *dev, struct iommu_gpasid_bind_data *data);
309 int (*sva_unbind_gpasid)(struct device *dev, u32 pasid);
311 int (*def_domain_type)(struct device *dev);
313 unsigned long pgsize_bitmap;
314 struct module *owner;
318 * struct iommu_device - IOMMU core representation of one IOMMU hardware
320 * @list: Used by the iommu-core to keep a list of registered iommus
321 * @ops: iommu-ops for talking to this iommu
322 * @dev: struct device for sysfs handling
324 struct iommu_device {
325 struct list_head list;
326 const struct iommu_ops *ops;
327 struct fwnode_handle *fwnode;
332 * struct iommu_fault_event - Generic fault event
334 * Can represent recoverable faults such as a page requests or
335 * unrecoverable faults such as DMA or IRQ remapping faults.
337 * @fault: fault descriptor
338 * @list: pending fault event list, used for tracking responses
340 struct iommu_fault_event {
341 struct iommu_fault fault;
342 struct list_head list;
346 * struct iommu_fault_param - per-device IOMMU fault data
347 * @handler: Callback function to handle IOMMU faults at device level
348 * @data: handler private data
349 * @faults: holds the pending faults which needs response
350 * @lock: protect pending faults list
352 struct iommu_fault_param {
353 iommu_dev_fault_handler_t handler;
355 struct list_head faults;
360 * struct dev_iommu - Collection of per-device IOMMU data
362 * @fault_param: IOMMU detected device fault reporting data
363 * @iopf_param: I/O Page Fault queue and data
364 * @fwspec: IOMMU fwspec data
365 * @iommu_dev: IOMMU device this device is linked to
366 * @priv: IOMMU Driver private data
368 * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
369 * struct iommu_group *iommu_group;
373 struct iommu_fault_param *fault_param;
374 struct iopf_device_param *iopf_param;
375 struct iommu_fwspec *fwspec;
376 struct iommu_device *iommu_dev;
380 int iommu_device_register(struct iommu_device *iommu,
381 const struct iommu_ops *ops,
382 struct device *hwdev);
383 void iommu_device_unregister(struct iommu_device *iommu);
384 int iommu_device_sysfs_add(struct iommu_device *iommu,
385 struct device *parent,
386 const struct attribute_group **groups,
387 const char *fmt, ...) __printf(4, 5);
388 void iommu_device_sysfs_remove(struct iommu_device *iommu);
389 int iommu_device_link(struct iommu_device *iommu, struct device *link);
390 void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
391 int iommu_deferred_attach(struct device *dev, struct iommu_domain *domain);
393 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
395 return (struct iommu_device *)dev_get_drvdata(dev);
398 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
400 *gather = (struct iommu_iotlb_gather) {
402 .freelist = LIST_HEAD_INIT(gather->freelist),
406 #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
407 #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
408 #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
409 #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
410 #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
411 #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
413 extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
414 extern int bus_iommu_probe(struct bus_type *bus);
415 extern bool iommu_present(struct bus_type *bus);
416 extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
417 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
418 extern struct iommu_group *iommu_group_get_by_id(int id);
419 extern void iommu_domain_free(struct iommu_domain *domain);
420 extern int iommu_attach_device(struct iommu_domain *domain,
422 extern void iommu_detach_device(struct iommu_domain *domain,
424 extern int iommu_uapi_cache_invalidate(struct iommu_domain *domain,
428 extern int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain,
429 struct device *dev, void __user *udata);
430 extern int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
431 struct device *dev, void __user *udata);
432 extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
433 struct device *dev, ioasid_t pasid);
434 extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
435 extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
436 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
437 phys_addr_t paddr, size_t size, int prot);
438 extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
439 phys_addr_t paddr, size_t size, int prot);
440 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
442 extern size_t iommu_unmap_fast(struct iommu_domain *domain,
443 unsigned long iova, size_t size,
444 struct iommu_iotlb_gather *iotlb_gather);
445 extern ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
446 struct scatterlist *sg, unsigned int nents, int prot);
447 extern ssize_t iommu_map_sg_atomic(struct iommu_domain *domain,
448 unsigned long iova, struct scatterlist *sg,
449 unsigned int nents, int prot);
450 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
451 extern void iommu_set_fault_handler(struct iommu_domain *domain,
452 iommu_fault_handler_t handler, void *token);
454 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
455 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
456 extern void generic_iommu_put_resv_regions(struct device *dev,
457 struct list_head *list);
458 extern void iommu_set_default_passthrough(bool cmd_line);
459 extern void iommu_set_default_translated(bool cmd_line);
460 extern bool iommu_default_passthrough(void);
461 extern struct iommu_resv_region *
462 iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
463 enum iommu_resv_type type);
464 extern int iommu_get_group_resv_regions(struct iommu_group *group,
465 struct list_head *head);
467 extern int iommu_attach_group(struct iommu_domain *domain,
468 struct iommu_group *group);
469 extern void iommu_detach_group(struct iommu_domain *domain,
470 struct iommu_group *group);
471 extern struct iommu_group *iommu_group_alloc(void);
472 extern void *iommu_group_get_iommudata(struct iommu_group *group);
473 extern void iommu_group_set_iommudata(struct iommu_group *group,
475 void (*release)(void *iommu_data));
476 extern int iommu_group_set_name(struct iommu_group *group, const char *name);
477 extern int iommu_group_add_device(struct iommu_group *group,
479 extern void iommu_group_remove_device(struct device *dev);
480 extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
481 int (*fn)(struct device *, void *));
482 extern struct iommu_group *iommu_group_get(struct device *dev);
483 extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
484 extern void iommu_group_put(struct iommu_group *group);
485 extern int iommu_group_register_notifier(struct iommu_group *group,
486 struct notifier_block *nb);
487 extern int iommu_group_unregister_notifier(struct iommu_group *group,
488 struct notifier_block *nb);
489 extern int iommu_register_device_fault_handler(struct device *dev,
490 iommu_dev_fault_handler_t handler,
493 extern int iommu_unregister_device_fault_handler(struct device *dev);
495 extern int iommu_report_device_fault(struct device *dev,
496 struct iommu_fault_event *evt);
497 extern int iommu_page_response(struct device *dev,
498 struct iommu_page_response *msg);
500 extern int iommu_group_id(struct iommu_group *group);
501 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
503 int iommu_enable_nesting(struct iommu_domain *domain);
504 int iommu_set_pgtable_quirks(struct iommu_domain *domain,
505 unsigned long quirks);
507 void iommu_set_dma_strict(void);
509 extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
510 unsigned long iova, int flags);
512 static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
514 if (domain->ops->flush_iotlb_all)
515 domain->ops->flush_iotlb_all(domain);
518 static inline void iommu_iotlb_sync(struct iommu_domain *domain,
519 struct iommu_iotlb_gather *iotlb_gather)
521 if (domain->ops->iotlb_sync)
522 domain->ops->iotlb_sync(domain, iotlb_gather);
524 iommu_iotlb_gather_init(iotlb_gather);
528 * iommu_iotlb_gather_is_disjoint - Checks whether a new range is disjoint
530 * @gather: TLB gather data
531 * @iova: start of page to invalidate
532 * @size: size of page to invalidate
534 * Helper for IOMMU drivers to check whether a new range and the gathered range
535 * are disjoint. For many IOMMUs, flushing the IOMMU in this case is better
536 * than merging the two, which might lead to unnecessary invalidations.
539 bool iommu_iotlb_gather_is_disjoint(struct iommu_iotlb_gather *gather,
540 unsigned long iova, size_t size)
542 unsigned long start = iova, end = start + size - 1;
544 return gather->end != 0 &&
545 (end + 1 < gather->start || start > gather->end + 1);
550 * iommu_iotlb_gather_add_range - Gather for address-based TLB invalidation
551 * @gather: TLB gather data
552 * @iova: start of page to invalidate
553 * @size: size of page to invalidate
555 * Helper for IOMMU drivers to build arbitrarily-sized invalidation commands
556 * where only the address range matters, and simply minimising intermediate
557 * syncs is preferred.
559 static inline void iommu_iotlb_gather_add_range(struct iommu_iotlb_gather *gather,
560 unsigned long iova, size_t size)
562 unsigned long end = iova + size - 1;
564 if (gather->start > iova)
565 gather->start = iova;
566 if (gather->end < end)
571 * iommu_iotlb_gather_add_page - Gather for page-based TLB invalidation
572 * @domain: IOMMU domain to be invalidated
573 * @gather: TLB gather data
574 * @iova: start of page to invalidate
575 * @size: size of page to invalidate
577 * Helper for IOMMU drivers to build invalidation commands based on individual
578 * pages, or with page size/table level hints which cannot be gathered if they
581 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
582 struct iommu_iotlb_gather *gather,
583 unsigned long iova, size_t size)
586 * If the new page is disjoint from the current range or is mapped at
587 * a different granularity, then sync the TLB so that the gather
588 * structure can be rewritten.
590 if ((gather->pgsize && gather->pgsize != size) ||
591 iommu_iotlb_gather_is_disjoint(gather, iova, size))
592 iommu_iotlb_sync(domain, gather);
594 gather->pgsize = size;
595 iommu_iotlb_gather_add_range(gather, iova, size);
598 static inline bool iommu_iotlb_gather_queued(struct iommu_iotlb_gather *gather)
600 return gather && gather->queued;
603 /* PCI device grouping function */
604 extern struct iommu_group *pci_device_group(struct device *dev);
605 /* Generic device grouping function */
606 extern struct iommu_group *generic_device_group(struct device *dev);
607 /* FSL-MC device grouping function */
608 struct iommu_group *fsl_mc_device_group(struct device *dev);
611 * struct iommu_fwspec - per-device IOMMU instance data
612 * @ops: ops for this device's IOMMU
613 * @iommu_fwnode: firmware handle for this device's IOMMU
614 * @flags: IOMMU_FWSPEC_* flags
615 * @num_ids: number of associated device IDs
616 * @ids: IDs which this device may present to the IOMMU
618 struct iommu_fwspec {
619 const struct iommu_ops *ops;
620 struct fwnode_handle *iommu_fwnode;
622 unsigned int num_ids;
626 /* ATS is supported */
627 #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
630 * struct iommu_sva - handle to a device-mm bond
636 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
637 const struct iommu_ops *ops);
638 void iommu_fwspec_free(struct device *dev);
639 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
640 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
642 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
645 return dev->iommu->fwspec;
650 static inline void dev_iommu_fwspec_set(struct device *dev,
651 struct iommu_fwspec *fwspec)
653 dev->iommu->fwspec = fwspec;
656 static inline void *dev_iommu_priv_get(struct device *dev)
659 return dev->iommu->priv;
664 static inline void dev_iommu_priv_set(struct device *dev, void *priv)
666 dev->iommu->priv = priv;
669 int iommu_probe_device(struct device *dev);
670 void iommu_release_device(struct device *dev);
672 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
673 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
674 bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
675 int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev);
676 void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev);
677 int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev);
679 struct iommu_sva *iommu_sva_bind_device(struct device *dev,
680 struct mm_struct *mm,
682 void iommu_sva_unbind_device(struct iommu_sva *handle);
683 u32 iommu_sva_get_pasid(struct iommu_sva *handle);
685 #else /* CONFIG_IOMMU_API */
688 struct iommu_group {};
689 struct iommu_fwspec {};
690 struct iommu_device {};
691 struct iommu_fault_param {};
692 struct iommu_iotlb_gather {};
694 static inline bool iommu_present(struct bus_type *bus)
699 static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
704 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
709 static inline struct iommu_group *iommu_group_get_by_id(int id)
714 static inline void iommu_domain_free(struct iommu_domain *domain)
718 static inline int iommu_attach_device(struct iommu_domain *domain,
724 static inline void iommu_detach_device(struct iommu_domain *domain,
729 static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
734 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
735 phys_addr_t paddr, size_t size, int prot)
740 static inline int iommu_map_atomic(struct iommu_domain *domain,
741 unsigned long iova, phys_addr_t paddr,
742 size_t size, int prot)
747 static inline size_t iommu_unmap(struct iommu_domain *domain,
748 unsigned long iova, size_t size)
753 static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
754 unsigned long iova, int gfp_order,
755 struct iommu_iotlb_gather *iotlb_gather)
760 static inline ssize_t iommu_map_sg(struct iommu_domain *domain,
761 unsigned long iova, struct scatterlist *sg,
762 unsigned int nents, int prot)
767 static inline ssize_t iommu_map_sg_atomic(struct iommu_domain *domain,
768 unsigned long iova, struct scatterlist *sg,
769 unsigned int nents, int prot)
774 static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
778 static inline void iommu_iotlb_sync(struct iommu_domain *domain,
779 struct iommu_iotlb_gather *iotlb_gather)
783 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
788 static inline void iommu_set_fault_handler(struct iommu_domain *domain,
789 iommu_fault_handler_t handler, void *token)
793 static inline void iommu_get_resv_regions(struct device *dev,
794 struct list_head *list)
798 static inline void iommu_put_resv_regions(struct device *dev,
799 struct list_head *list)
803 static inline int iommu_get_group_resv_regions(struct iommu_group *group,
804 struct list_head *head)
809 static inline void iommu_set_default_passthrough(bool cmd_line)
813 static inline void iommu_set_default_translated(bool cmd_line)
817 static inline bool iommu_default_passthrough(void)
822 static inline int iommu_attach_group(struct iommu_domain *domain,
823 struct iommu_group *group)
828 static inline void iommu_detach_group(struct iommu_domain *domain,
829 struct iommu_group *group)
833 static inline struct iommu_group *iommu_group_alloc(void)
835 return ERR_PTR(-ENODEV);
838 static inline void *iommu_group_get_iommudata(struct iommu_group *group)
843 static inline void iommu_group_set_iommudata(struct iommu_group *group,
845 void (*release)(void *iommu_data))
849 static inline int iommu_group_set_name(struct iommu_group *group,
855 static inline int iommu_group_add_device(struct iommu_group *group,
861 static inline void iommu_group_remove_device(struct device *dev)
865 static inline int iommu_group_for_each_dev(struct iommu_group *group,
867 int (*fn)(struct device *, void *))
872 static inline struct iommu_group *iommu_group_get(struct device *dev)
877 static inline void iommu_group_put(struct iommu_group *group)
881 static inline int iommu_group_register_notifier(struct iommu_group *group,
882 struct notifier_block *nb)
887 static inline int iommu_group_unregister_notifier(struct iommu_group *group,
888 struct notifier_block *nb)
894 int iommu_register_device_fault_handler(struct device *dev,
895 iommu_dev_fault_handler_t handler,
901 static inline int iommu_unregister_device_fault_handler(struct device *dev)
907 int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
912 static inline int iommu_page_response(struct device *dev,
913 struct iommu_page_response *msg)
918 static inline int iommu_group_id(struct iommu_group *group)
923 static inline int iommu_set_pgtable_quirks(struct iommu_domain *domain,
924 unsigned long quirks)
929 static inline int iommu_device_register(struct iommu_device *iommu,
930 const struct iommu_ops *ops,
931 struct device *hwdev)
936 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
941 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
945 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
946 struct iommu_iotlb_gather *gather,
947 unsigned long iova, size_t size)
951 static inline bool iommu_iotlb_gather_queued(struct iommu_iotlb_gather *gather)
956 static inline void iommu_device_unregister(struct iommu_device *iommu)
960 static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
961 struct device *parent,
962 const struct attribute_group **groups,
963 const char *fmt, ...)
968 static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
972 static inline int iommu_device_link(struct device *dev, struct device *link)
977 static inline void iommu_device_unlink(struct device *dev, struct device *link)
981 static inline int iommu_fwspec_init(struct device *dev,
982 struct fwnode_handle *iommu_fwnode,
983 const struct iommu_ops *ops)
988 static inline void iommu_fwspec_free(struct device *dev)
992 static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
999 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
1005 iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
1011 iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
1017 iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
1023 iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev)
1029 iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev)
1034 iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
1039 static inline struct iommu_sva *
1040 iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
1045 static inline void iommu_sva_unbind_device(struct iommu_sva *handle)
1049 static inline u32 iommu_sva_get_pasid(struct iommu_sva *handle)
1051 return IOMMU_PASID_INVALID;
1055 iommu_uapi_cache_invalidate(struct iommu_domain *domain,
1057 struct iommu_cache_invalidate_info *inv_info)
1062 static inline int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain,
1063 struct device *dev, void __user *udata)
1068 static inline int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
1069 struct device *dev, void __user *udata)
1074 static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
1081 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
1085 #endif /* CONFIG_IOMMU_API */
1088 * iommu_map_sgtable - Map the given buffer to the IOMMU domain
1089 * @domain: The IOMMU domain to perform the mapping
1090 * @iova: The start address to map the buffer
1091 * @sgt: The sg_table object describing the buffer
1092 * @prot: IOMMU protection bits
1094 * Creates a mapping at @iova for the buffer described by a scatterlist
1095 * stored in the given sg_table object in the provided IOMMU domain.
1097 static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
1098 unsigned long iova, struct sg_table *sgt, int prot)
1100 return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
1103 #ifdef CONFIG_IOMMU_DEBUGFS
1104 extern struct dentry *iommu_debugfs_dir;
1105 void iommu_debugfs_setup(void);
1107 static inline void iommu_debugfs_setup(void) {}
1110 #endif /* __LINUX_IOMMU_H */