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;
44 /* iommu fault flags */
45 #define IOMMU_FAULT_READ 0x0
46 #define IOMMU_FAULT_WRITE 0x1
48 typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
49 struct device *, unsigned long, int, void *);
50 typedef int (*iommu_dev_fault_handler_t)(struct iommu_fault *, void *);
52 struct iommu_domain_geometry {
53 dma_addr_t aperture_start; /* First address that can be mapped */
54 dma_addr_t aperture_end; /* Last address that can be mapped */
55 bool force_aperture; /* DMA only allowed in mappable range? */
58 /* Domain feature flags */
59 #define __IOMMU_DOMAIN_PAGING (1U << 0) /* Support for iommu_map/unmap */
60 #define __IOMMU_DOMAIN_DMA_API (1U << 1) /* Domain for use in DMA-API
62 #define __IOMMU_DOMAIN_PT (1U << 2) /* Domain is identity mapped */
65 * This are the possible domain-types
67 * IOMMU_DOMAIN_BLOCKED - All DMA is blocked, can be used to isolate
69 * IOMMU_DOMAIN_IDENTITY - DMA addresses are system physical addresses
70 * IOMMU_DOMAIN_UNMANAGED - DMA mappings managed by IOMMU-API user, used
72 * IOMMU_DOMAIN_DMA - Internally used for DMA-API implementations.
73 * This flag allows IOMMU drivers to implement
74 * certain optimizations for these domains
76 #define IOMMU_DOMAIN_BLOCKED (0U)
77 #define IOMMU_DOMAIN_IDENTITY (__IOMMU_DOMAIN_PT)
78 #define IOMMU_DOMAIN_UNMANAGED (__IOMMU_DOMAIN_PAGING)
79 #define IOMMU_DOMAIN_DMA (__IOMMU_DOMAIN_PAGING | \
80 __IOMMU_DOMAIN_DMA_API)
84 const struct iommu_ops *ops;
85 unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */
86 iommu_fault_handler_t handler;
88 struct iommu_domain_geometry geometry;
93 IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA
95 IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */
96 IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */
99 /* These are the possible reserved region types */
100 enum iommu_resv_type {
101 /* Memory regions which must be mapped 1:1 at all times */
104 * Memory regions which are advertised to be 1:1 but are
105 * commonly considered relaxable in some conditions,
106 * for instance in device assignment use case (USB, Graphics)
108 IOMMU_RESV_DIRECT_RELAXABLE,
109 /* Arbitrary "never map this or give it to a device" address ranges */
111 /* Hardware MSI region (untranslated) */
113 /* Software-managed MSI translation window */
118 * struct iommu_resv_region - descriptor for a reserved memory region
119 * @list: Linked list pointers
120 * @start: System physical start address of the region
121 * @length: Length of the region in bytes
122 * @prot: IOMMU Protection flags (READ/WRITE/...)
123 * @type: Type of the reserved region
125 struct iommu_resv_region {
126 struct list_head list;
130 enum iommu_resv_type type;
134 * enum iommu_dev_features - Per device IOMMU features
135 * @IOMMU_DEV_FEAT_AUX: Auxiliary domain feature
136 * @IOMMU_DEV_FEAT_SVA: Shared Virtual Addresses
137 * @IOMMU_DEV_FEAT_IOPF: I/O Page Faults such as PRI or Stall. Generally
138 * enabling %IOMMU_DEV_FEAT_SVA requires
139 * %IOMMU_DEV_FEAT_IOPF, but some devices manage I/O Page
140 * Faults themselves instead of relying on the IOMMU. When
141 * supported, this feature must be enabled before and
142 * disabled after %IOMMU_DEV_FEAT_SVA.
144 * Device drivers query whether a feature is supported using
145 * iommu_dev_has_feature(), and enable it using iommu_dev_enable_feature().
147 enum iommu_dev_features {
153 #define IOMMU_PASID_INVALID (-1U)
155 #ifdef CONFIG_IOMMU_API
158 * struct iommu_iotlb_gather - Range information for a pending IOTLB flush
160 * @start: IOVA representing the start of the range to be flushed
161 * @end: IOVA representing the end of the range to be flushed (inclusive)
162 * @pgsize: The interval at which to perform the flush
164 * This structure is intended to be updated by multiple calls to the
165 * ->unmap() function in struct iommu_ops before eventually being passed
166 * into ->iotlb_sync().
168 struct iommu_iotlb_gather {
172 struct page *freelist;
176 * struct iommu_ops - iommu ops and capabilities
177 * @capable: check capability
178 * @domain_alloc: allocate iommu domain
179 * @domain_free: free iommu domain
180 * @attach_dev: attach device to an iommu domain
181 * @detach_dev: detach device from an iommu domain
182 * @map: map a physically contiguous memory region to an iommu domain
183 * @map_pages: map a physically contiguous set of pages of the same size to
185 * @unmap: unmap a physically contiguous memory region from an iommu domain
186 * @unmap_pages: unmap a number of pages of the same size from an iommu domain
187 * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain
188 * @iotlb_sync_map: Sync mappings created recently using @map to the hardware
189 * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
191 * @iova_to_phys: translate iova to physical address
192 * @probe_device: Add device to iommu driver handling
193 * @release_device: Remove device from iommu driver handling
194 * @probe_finalize: Do final setup work after the device is added to an IOMMU
195 * group and attached to the groups domain
196 * @device_group: find iommu group for a particular device
197 * @enable_nesting: Enable nesting
198 * @set_pgtable_quirks: Set io page table quirks (IO_PGTABLE_QUIRK_*)
199 * @get_resv_regions: Request list of reserved regions for a device
200 * @put_resv_regions: Free list of reserved regions for a device
201 * @apply_resv_region: Temporary helper call-back for iova reserved ranges
202 * @of_xlate: add OF master IDs to iommu grouping
203 * @is_attach_deferred: Check if domain attach should be deferred from iommu
204 * driver init to device driver init (default no)
205 * @dev_has/enable/disable_feat: per device entries to check/enable/disable
206 * iommu specific features.
207 * @dev_feat_enabled: check enabled feature
208 * @aux_attach/detach_dev: aux-domain specific attach/detach entries.
209 * @aux_get_pasid: get the pasid given an aux-domain
210 * @sva_bind: Bind process address space to device
211 * @sva_unbind: Unbind process address space from device
212 * @sva_get_pasid: Get PASID associated to a SVA handle
213 * @page_response: handle page request response
214 * @cache_invalidate: invalidate translation caches
215 * @sva_bind_gpasid: bind guest pasid and mm
216 * @sva_unbind_gpasid: unbind guest pasid and mm
217 * @def_domain_type: device default domain type, return value:
218 * - IOMMU_DOMAIN_IDENTITY: must use an identity domain
219 * - IOMMU_DOMAIN_DMA: must use a dma domain
220 * - 0: use the default setting
221 * @pgsize_bitmap: bitmap of all possible supported page sizes
222 * @owner: Driver module providing these ops
225 bool (*capable)(enum iommu_cap);
227 /* Domain allocation and freeing by the iommu driver */
228 struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);
229 void (*domain_free)(struct iommu_domain *);
231 int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
232 void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
233 int (*map)(struct iommu_domain *domain, unsigned long iova,
234 phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
235 int (*map_pages)(struct iommu_domain *domain, unsigned long iova,
236 phys_addr_t paddr, size_t pgsize, size_t pgcount,
237 int prot, gfp_t gfp, size_t *mapped);
238 size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
239 size_t size, struct iommu_iotlb_gather *iotlb_gather);
240 size_t (*unmap_pages)(struct iommu_domain *domain, unsigned long iova,
241 size_t pgsize, size_t pgcount,
242 struct iommu_iotlb_gather *iotlb_gather);
243 void (*flush_iotlb_all)(struct iommu_domain *domain);
244 void (*iotlb_sync_map)(struct iommu_domain *domain, unsigned long iova,
246 void (*iotlb_sync)(struct iommu_domain *domain,
247 struct iommu_iotlb_gather *iotlb_gather);
248 phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
249 struct iommu_device *(*probe_device)(struct device *dev);
250 void (*release_device)(struct device *dev);
251 void (*probe_finalize)(struct device *dev);
252 struct iommu_group *(*device_group)(struct device *dev);
253 int (*enable_nesting)(struct iommu_domain *domain);
254 int (*set_pgtable_quirks)(struct iommu_domain *domain,
255 unsigned long quirks);
257 /* Request/Free a list of reserved regions for a device */
258 void (*get_resv_regions)(struct device *dev, struct list_head *list);
259 void (*put_resv_regions)(struct device *dev, struct list_head *list);
260 void (*apply_resv_region)(struct device *dev,
261 struct iommu_domain *domain,
262 struct iommu_resv_region *region);
264 int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
265 bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev);
267 /* Per device IOMMU features */
268 bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f);
269 bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f);
270 int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
271 int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
273 /* Aux-domain specific attach/detach entries */
274 int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev);
275 void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev);
276 int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev);
278 struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm,
280 void (*sva_unbind)(struct iommu_sva *handle);
281 u32 (*sva_get_pasid)(struct iommu_sva *handle);
283 int (*page_response)(struct device *dev,
284 struct iommu_fault_event *evt,
285 struct iommu_page_response *msg);
286 int (*cache_invalidate)(struct iommu_domain *domain, struct device *dev,
287 struct iommu_cache_invalidate_info *inv_info);
288 int (*sva_bind_gpasid)(struct iommu_domain *domain,
289 struct device *dev, struct iommu_gpasid_bind_data *data);
291 int (*sva_unbind_gpasid)(struct device *dev, u32 pasid);
293 int (*def_domain_type)(struct device *dev);
295 unsigned long pgsize_bitmap;
296 struct module *owner;
300 * struct iommu_device - IOMMU core representation of one IOMMU hardware
302 * @list: Used by the iommu-core to keep a list of registered iommus
303 * @ops: iommu-ops for talking to this iommu
304 * @dev: struct device for sysfs handling
306 struct iommu_device {
307 struct list_head list;
308 const struct iommu_ops *ops;
309 struct fwnode_handle *fwnode;
314 * struct iommu_fault_event - Generic fault event
316 * Can represent recoverable faults such as a page requests or
317 * unrecoverable faults such as DMA or IRQ remapping faults.
319 * @fault: fault descriptor
320 * @list: pending fault event list, used for tracking responses
322 struct iommu_fault_event {
323 struct iommu_fault fault;
324 struct list_head list;
328 * struct iommu_fault_param - per-device IOMMU fault data
329 * @handler: Callback function to handle IOMMU faults at device level
330 * @data: handler private data
331 * @faults: holds the pending faults which needs response
332 * @lock: protect pending faults list
334 struct iommu_fault_param {
335 iommu_dev_fault_handler_t handler;
337 struct list_head faults;
342 * struct dev_iommu - Collection of per-device IOMMU data
344 * @fault_param: IOMMU detected device fault reporting data
345 * @iopf_param: I/O Page Fault queue and data
346 * @fwspec: IOMMU fwspec data
347 * @iommu_dev: IOMMU device this device is linked to
348 * @priv: IOMMU Driver private data
350 * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
351 * struct iommu_group *iommu_group;
355 struct iommu_fault_param *fault_param;
356 struct iopf_device_param *iopf_param;
357 struct iommu_fwspec *fwspec;
358 struct iommu_device *iommu_dev;
362 int iommu_device_register(struct iommu_device *iommu,
363 const struct iommu_ops *ops,
364 struct device *hwdev);
365 void iommu_device_unregister(struct iommu_device *iommu);
366 int iommu_device_sysfs_add(struct iommu_device *iommu,
367 struct device *parent,
368 const struct attribute_group **groups,
369 const char *fmt, ...) __printf(4, 5);
370 void iommu_device_sysfs_remove(struct iommu_device *iommu);
371 int iommu_device_link(struct iommu_device *iommu, struct device *link);
372 void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
373 int iommu_deferred_attach(struct device *dev, struct iommu_domain *domain);
375 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
377 return (struct iommu_device *)dev_get_drvdata(dev);
380 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
382 *gather = (struct iommu_iotlb_gather) {
387 #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
388 #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
389 #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
390 #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
391 #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
392 #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
394 extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
395 extern int bus_iommu_probe(struct bus_type *bus);
396 extern bool iommu_present(struct bus_type *bus);
397 extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
398 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
399 extern struct iommu_group *iommu_group_get_by_id(int id);
400 extern void iommu_domain_free(struct iommu_domain *domain);
401 extern int iommu_attach_device(struct iommu_domain *domain,
403 extern void iommu_detach_device(struct iommu_domain *domain,
405 extern int iommu_uapi_cache_invalidate(struct iommu_domain *domain,
409 extern int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain,
410 struct device *dev, void __user *udata);
411 extern int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
412 struct device *dev, void __user *udata);
413 extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
414 struct device *dev, ioasid_t pasid);
415 extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
416 extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
417 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
418 phys_addr_t paddr, size_t size, int prot);
419 extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
420 phys_addr_t paddr, size_t size, int prot);
421 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
423 extern size_t iommu_unmap_fast(struct iommu_domain *domain,
424 unsigned long iova, size_t size,
425 struct iommu_iotlb_gather *iotlb_gather);
426 extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
427 struct scatterlist *sg,unsigned int nents, int prot);
428 extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
429 unsigned long iova, struct scatterlist *sg,
430 unsigned int nents, int prot);
431 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
432 extern void iommu_set_fault_handler(struct iommu_domain *domain,
433 iommu_fault_handler_t handler, void *token);
435 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
436 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
437 extern void generic_iommu_put_resv_regions(struct device *dev,
438 struct list_head *list);
439 extern void iommu_set_default_passthrough(bool cmd_line);
440 extern void iommu_set_default_translated(bool cmd_line);
441 extern bool iommu_default_passthrough(void);
442 extern struct iommu_resv_region *
443 iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
444 enum iommu_resv_type type);
445 extern int iommu_get_group_resv_regions(struct iommu_group *group,
446 struct list_head *head);
448 extern int iommu_attach_group(struct iommu_domain *domain,
449 struct iommu_group *group);
450 extern void iommu_detach_group(struct iommu_domain *domain,
451 struct iommu_group *group);
452 extern struct iommu_group *iommu_group_alloc(void);
453 extern void *iommu_group_get_iommudata(struct iommu_group *group);
454 extern void iommu_group_set_iommudata(struct iommu_group *group,
456 void (*release)(void *iommu_data));
457 extern int iommu_group_set_name(struct iommu_group *group, const char *name);
458 extern int iommu_group_add_device(struct iommu_group *group,
460 extern void iommu_group_remove_device(struct device *dev);
461 extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
462 int (*fn)(struct device *, void *));
463 extern struct iommu_group *iommu_group_get(struct device *dev);
464 extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
465 extern void iommu_group_put(struct iommu_group *group);
466 extern int iommu_group_register_notifier(struct iommu_group *group,
467 struct notifier_block *nb);
468 extern int iommu_group_unregister_notifier(struct iommu_group *group,
469 struct notifier_block *nb);
470 extern int iommu_register_device_fault_handler(struct device *dev,
471 iommu_dev_fault_handler_t handler,
474 extern int iommu_unregister_device_fault_handler(struct device *dev);
476 extern int iommu_report_device_fault(struct device *dev,
477 struct iommu_fault_event *evt);
478 extern int iommu_page_response(struct device *dev,
479 struct iommu_page_response *msg);
481 extern int iommu_group_id(struct iommu_group *group);
482 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
484 int iommu_enable_nesting(struct iommu_domain *domain);
485 int iommu_set_pgtable_quirks(struct iommu_domain *domain,
486 unsigned long quirks);
488 void iommu_set_dma_strict(bool val);
489 bool iommu_get_dma_strict(struct iommu_domain *domain);
491 extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
492 unsigned long iova, int flags);
494 static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
496 if (domain->ops->flush_iotlb_all)
497 domain->ops->flush_iotlb_all(domain);
500 static inline void iommu_iotlb_sync(struct iommu_domain *domain,
501 struct iommu_iotlb_gather *iotlb_gather)
503 if (domain->ops->iotlb_sync)
504 domain->ops->iotlb_sync(domain, iotlb_gather);
506 iommu_iotlb_gather_init(iotlb_gather);
509 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
510 struct iommu_iotlb_gather *gather,
511 unsigned long iova, size_t size)
513 unsigned long start = iova, end = start + size - 1;
516 * If the new page is disjoint from the current range or is mapped at
517 * a different granularity, then sync the TLB so that the gather
518 * structure can be rewritten.
520 if (gather->pgsize != size ||
521 end + 1 < gather->start || start > gather->end + 1) {
523 iommu_iotlb_sync(domain, gather);
524 gather->pgsize = size;
527 if (gather->end < end)
530 if (gather->start > start)
531 gather->start = start;
534 /* PCI device grouping function */
535 extern struct iommu_group *pci_device_group(struct device *dev);
536 /* Generic device grouping function */
537 extern struct iommu_group *generic_device_group(struct device *dev);
538 /* FSL-MC device grouping function */
539 struct iommu_group *fsl_mc_device_group(struct device *dev);
542 * struct iommu_fwspec - per-device IOMMU instance data
543 * @ops: ops for this device's IOMMU
544 * @iommu_fwnode: firmware handle for this device's IOMMU
545 * @flags: IOMMU_FWSPEC_* flags
546 * @num_ids: number of associated device IDs
547 * @ids: IDs which this device may present to the IOMMU
549 struct iommu_fwspec {
550 const struct iommu_ops *ops;
551 struct fwnode_handle *iommu_fwnode;
553 unsigned int num_ids;
557 /* ATS is supported */
558 #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
561 * struct iommu_sva - handle to a device-mm bond
567 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
568 const struct iommu_ops *ops);
569 void iommu_fwspec_free(struct device *dev);
570 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
571 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
573 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
576 return dev->iommu->fwspec;
581 static inline void dev_iommu_fwspec_set(struct device *dev,
582 struct iommu_fwspec *fwspec)
584 dev->iommu->fwspec = fwspec;
587 static inline void *dev_iommu_priv_get(struct device *dev)
590 return dev->iommu->priv;
595 static inline void dev_iommu_priv_set(struct device *dev, void *priv)
597 dev->iommu->priv = priv;
600 int iommu_probe_device(struct device *dev);
601 void iommu_release_device(struct device *dev);
603 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
604 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
605 bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
606 int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev);
607 void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev);
608 int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev);
610 struct iommu_sva *iommu_sva_bind_device(struct device *dev,
611 struct mm_struct *mm,
613 void iommu_sva_unbind_device(struct iommu_sva *handle);
614 u32 iommu_sva_get_pasid(struct iommu_sva *handle);
616 #else /* CONFIG_IOMMU_API */
619 struct iommu_group {};
620 struct iommu_fwspec {};
621 struct iommu_device {};
622 struct iommu_fault_param {};
623 struct iommu_iotlb_gather {};
625 static inline bool iommu_present(struct bus_type *bus)
630 static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
635 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
640 static inline struct iommu_group *iommu_group_get_by_id(int id)
645 static inline void iommu_domain_free(struct iommu_domain *domain)
649 static inline int iommu_attach_device(struct iommu_domain *domain,
655 static inline void iommu_detach_device(struct iommu_domain *domain,
660 static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
665 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
666 phys_addr_t paddr, size_t size, int prot)
671 static inline int iommu_map_atomic(struct iommu_domain *domain,
672 unsigned long iova, phys_addr_t paddr,
673 size_t size, int prot)
678 static inline size_t iommu_unmap(struct iommu_domain *domain,
679 unsigned long iova, size_t size)
684 static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
685 unsigned long iova, int gfp_order,
686 struct iommu_iotlb_gather *iotlb_gather)
691 static inline size_t iommu_map_sg(struct iommu_domain *domain,
692 unsigned long iova, struct scatterlist *sg,
693 unsigned int nents, int prot)
698 static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain,
699 unsigned long iova, struct scatterlist *sg,
700 unsigned int nents, int prot)
705 static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
709 static inline void iommu_iotlb_sync(struct iommu_domain *domain,
710 struct iommu_iotlb_gather *iotlb_gather)
714 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
719 static inline void iommu_set_fault_handler(struct iommu_domain *domain,
720 iommu_fault_handler_t handler, void *token)
724 static inline void iommu_get_resv_regions(struct device *dev,
725 struct list_head *list)
729 static inline void iommu_put_resv_regions(struct device *dev,
730 struct list_head *list)
734 static inline int iommu_get_group_resv_regions(struct iommu_group *group,
735 struct list_head *head)
740 static inline void iommu_set_default_passthrough(bool cmd_line)
744 static inline void iommu_set_default_translated(bool cmd_line)
748 static inline bool iommu_default_passthrough(void)
753 static inline int iommu_attach_group(struct iommu_domain *domain,
754 struct iommu_group *group)
759 static inline void iommu_detach_group(struct iommu_domain *domain,
760 struct iommu_group *group)
764 static inline struct iommu_group *iommu_group_alloc(void)
766 return ERR_PTR(-ENODEV);
769 static inline void *iommu_group_get_iommudata(struct iommu_group *group)
774 static inline void iommu_group_set_iommudata(struct iommu_group *group,
776 void (*release)(void *iommu_data))
780 static inline int iommu_group_set_name(struct iommu_group *group,
786 static inline int iommu_group_add_device(struct iommu_group *group,
792 static inline void iommu_group_remove_device(struct device *dev)
796 static inline int iommu_group_for_each_dev(struct iommu_group *group,
798 int (*fn)(struct device *, void *))
803 static inline struct iommu_group *iommu_group_get(struct device *dev)
808 static inline void iommu_group_put(struct iommu_group *group)
812 static inline int iommu_group_register_notifier(struct iommu_group *group,
813 struct notifier_block *nb)
818 static inline int iommu_group_unregister_notifier(struct iommu_group *group,
819 struct notifier_block *nb)
825 int iommu_register_device_fault_handler(struct device *dev,
826 iommu_dev_fault_handler_t handler,
832 static inline int iommu_unregister_device_fault_handler(struct device *dev)
838 int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
843 static inline int iommu_page_response(struct device *dev,
844 struct iommu_page_response *msg)
849 static inline int iommu_group_id(struct iommu_group *group)
854 static inline int iommu_set_pgtable_quirks(struct iommu_domain *domain,
855 unsigned long quirks)
860 static inline int iommu_device_register(struct iommu_device *iommu,
861 const struct iommu_ops *ops,
862 struct device *hwdev)
867 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
872 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
876 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
877 struct iommu_iotlb_gather *gather,
878 unsigned long iova, size_t size)
882 static inline void iommu_device_unregister(struct iommu_device *iommu)
886 static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
887 struct device *parent,
888 const struct attribute_group **groups,
889 const char *fmt, ...)
894 static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
898 static inline int iommu_device_link(struct device *dev, struct device *link)
903 static inline void iommu_device_unlink(struct device *dev, struct device *link)
907 static inline int iommu_fwspec_init(struct device *dev,
908 struct fwnode_handle *iommu_fwnode,
909 const struct iommu_ops *ops)
914 static inline void iommu_fwspec_free(struct device *dev)
918 static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
925 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
931 iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
937 iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
943 iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
949 iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev)
955 iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev)
960 iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
965 static inline struct iommu_sva *
966 iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
971 static inline void iommu_sva_unbind_device(struct iommu_sva *handle)
975 static inline u32 iommu_sva_get_pasid(struct iommu_sva *handle)
977 return IOMMU_PASID_INVALID;
981 iommu_uapi_cache_invalidate(struct iommu_domain *domain,
983 struct iommu_cache_invalidate_info *inv_info)
988 static inline int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain,
989 struct device *dev, void __user *udata)
994 static inline int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
995 struct device *dev, void __user *udata)
1000 static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
1007 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
1011 #endif /* CONFIG_IOMMU_API */
1014 * iommu_map_sgtable - Map the given buffer to the IOMMU domain
1015 * @domain: The IOMMU domain to perform the mapping
1016 * @iova: The start address to map the buffer
1017 * @sgt: The sg_table object describing the buffer
1018 * @prot: IOMMU protection bits
1020 * Creates a mapping at @iova for the buffer described by a scatterlist
1021 * stored in the given sg_table object in the provided IOMMU domain.
1023 static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
1024 unsigned long iova, struct sg_table *sgt, int prot)
1026 return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
1029 #ifdef CONFIG_IOMMU_DEBUGFS
1030 extern struct dentry *iommu_debugfs_dir;
1031 void iommu_debugfs_setup(void);
1033 static inline void iommu_debugfs_setup(void) {}
1036 #endif /* __LINUX_IOMMU_H */