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 * @unmap: unmap a physically contiguous memory region from an iommu domain
184 * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain
185 * @iotlb_sync_map: Sync mappings created recently using @map to the hardware
186 * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
188 * @iova_to_phys: translate iova to physical address
189 * @probe_device: Add device to iommu driver handling
190 * @release_device: Remove device from iommu driver handling
191 * @probe_finalize: Do final setup work after the device is added to an IOMMU
192 * group and attached to the groups domain
193 * @device_group: find iommu group for a particular device
194 * @enable_nesting: Enable nesting
195 * @set_pgtable_quirks: Set io page table quirks (IO_PGTABLE_QUIRK_*)
196 * @get_resv_regions: Request list of reserved regions for a device
197 * @put_resv_regions: Free list of reserved regions for a device
198 * @apply_resv_region: Temporary helper call-back for iova reserved ranges
199 * @of_xlate: add OF master IDs to iommu grouping
200 * @is_attach_deferred: Check if domain attach should be deferred from iommu
201 * driver init to device driver init (default no)
202 * @dev_has/enable/disable_feat: per device entries to check/enable/disable
203 * iommu specific features.
204 * @dev_feat_enabled: check enabled feature
205 * @aux_attach/detach_dev: aux-domain specific attach/detach entries.
206 * @aux_get_pasid: get the pasid given an aux-domain
207 * @sva_bind: Bind process address space to device
208 * @sva_unbind: Unbind process address space from device
209 * @sva_get_pasid: Get PASID associated to a SVA handle
210 * @page_response: handle page request response
211 * @cache_invalidate: invalidate translation caches
212 * @sva_bind_gpasid: bind guest pasid and mm
213 * @sva_unbind_gpasid: unbind guest pasid and mm
214 * @def_domain_type: device default domain type, return value:
215 * - IOMMU_DOMAIN_IDENTITY: must use an identity domain
216 * - IOMMU_DOMAIN_DMA: must use a dma domain
217 * - 0: use the default setting
218 * @pgsize_bitmap: bitmap of all possible supported page sizes
219 * @owner: Driver module providing these ops
222 bool (*capable)(enum iommu_cap);
224 /* Domain allocation and freeing by the iommu driver */
225 struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);
226 void (*domain_free)(struct iommu_domain *);
228 int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
229 void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
230 int (*map)(struct iommu_domain *domain, unsigned long iova,
231 phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
232 size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
233 size_t size, struct iommu_iotlb_gather *iotlb_gather);
234 void (*flush_iotlb_all)(struct iommu_domain *domain);
235 void (*iotlb_sync_map)(struct iommu_domain *domain, unsigned long iova,
237 void (*iotlb_sync)(struct iommu_domain *domain,
238 struct iommu_iotlb_gather *iotlb_gather);
239 phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
240 struct iommu_device *(*probe_device)(struct device *dev);
241 void (*release_device)(struct device *dev);
242 void (*probe_finalize)(struct device *dev);
243 struct iommu_group *(*device_group)(struct device *dev);
244 int (*enable_nesting)(struct iommu_domain *domain);
245 int (*set_pgtable_quirks)(struct iommu_domain *domain,
246 unsigned long quirks);
248 /* Request/Free a list of reserved regions for a device */
249 void (*get_resv_regions)(struct device *dev, struct list_head *list);
250 void (*put_resv_regions)(struct device *dev, struct list_head *list);
251 void (*apply_resv_region)(struct device *dev,
252 struct iommu_domain *domain,
253 struct iommu_resv_region *region);
255 int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
256 bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev);
258 /* Per device IOMMU features */
259 bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f);
260 bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f);
261 int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
262 int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
264 /* Aux-domain specific attach/detach entries */
265 int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev);
266 void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev);
267 int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev);
269 struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm,
271 void (*sva_unbind)(struct iommu_sva *handle);
272 u32 (*sva_get_pasid)(struct iommu_sva *handle);
274 int (*page_response)(struct device *dev,
275 struct iommu_fault_event *evt,
276 struct iommu_page_response *msg);
277 int (*cache_invalidate)(struct iommu_domain *domain, struct device *dev,
278 struct iommu_cache_invalidate_info *inv_info);
279 int (*sva_bind_gpasid)(struct iommu_domain *domain,
280 struct device *dev, struct iommu_gpasid_bind_data *data);
282 int (*sva_unbind_gpasid)(struct device *dev, u32 pasid);
284 int (*def_domain_type)(struct device *dev);
286 unsigned long pgsize_bitmap;
287 struct module *owner;
291 * struct iommu_device - IOMMU core representation of one IOMMU hardware
293 * @list: Used by the iommu-core to keep a list of registered iommus
294 * @ops: iommu-ops for talking to this iommu
295 * @dev: struct device for sysfs handling
297 struct iommu_device {
298 struct list_head list;
299 const struct iommu_ops *ops;
300 struct fwnode_handle *fwnode;
305 * struct iommu_fault_event - Generic fault event
307 * Can represent recoverable faults such as a page requests or
308 * unrecoverable faults such as DMA or IRQ remapping faults.
310 * @fault: fault descriptor
311 * @list: pending fault event list, used for tracking responses
313 struct iommu_fault_event {
314 struct iommu_fault fault;
315 struct list_head list;
319 * struct iommu_fault_param - per-device IOMMU fault data
320 * @handler: Callback function to handle IOMMU faults at device level
321 * @data: handler private data
322 * @faults: holds the pending faults which needs response
323 * @lock: protect pending faults list
325 struct iommu_fault_param {
326 iommu_dev_fault_handler_t handler;
328 struct list_head faults;
333 * struct dev_iommu - Collection of per-device IOMMU data
335 * @fault_param: IOMMU detected device fault reporting data
336 * @iopf_param: I/O Page Fault queue and data
337 * @fwspec: IOMMU fwspec data
338 * @iommu_dev: IOMMU device this device is linked to
339 * @priv: IOMMU Driver private data
341 * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
342 * struct iommu_group *iommu_group;
346 struct iommu_fault_param *fault_param;
347 struct iopf_device_param *iopf_param;
348 struct iommu_fwspec *fwspec;
349 struct iommu_device *iommu_dev;
353 int iommu_device_register(struct iommu_device *iommu,
354 const struct iommu_ops *ops,
355 struct device *hwdev);
356 void iommu_device_unregister(struct iommu_device *iommu);
357 int iommu_device_sysfs_add(struct iommu_device *iommu,
358 struct device *parent,
359 const struct attribute_group **groups,
360 const char *fmt, ...) __printf(4, 5);
361 void iommu_device_sysfs_remove(struct iommu_device *iommu);
362 int iommu_device_link(struct iommu_device *iommu, struct device *link);
363 void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
364 int iommu_deferred_attach(struct device *dev, struct iommu_domain *domain);
366 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
368 return (struct iommu_device *)dev_get_drvdata(dev);
371 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
373 *gather = (struct iommu_iotlb_gather) {
378 #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
379 #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
380 #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
381 #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
382 #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
383 #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
385 extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
386 extern int bus_iommu_probe(struct bus_type *bus);
387 extern bool iommu_present(struct bus_type *bus);
388 extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
389 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
390 extern struct iommu_group *iommu_group_get_by_id(int id);
391 extern void iommu_domain_free(struct iommu_domain *domain);
392 extern int iommu_attach_device(struct iommu_domain *domain,
394 extern void iommu_detach_device(struct iommu_domain *domain,
396 extern int iommu_uapi_cache_invalidate(struct iommu_domain *domain,
400 extern int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain,
401 struct device *dev, void __user *udata);
402 extern int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
403 struct device *dev, void __user *udata);
404 extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
405 struct device *dev, ioasid_t pasid);
406 extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
407 extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
408 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
409 phys_addr_t paddr, size_t size, int prot);
410 extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
411 phys_addr_t paddr, size_t size, int prot);
412 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
414 extern size_t iommu_unmap_fast(struct iommu_domain *domain,
415 unsigned long iova, size_t size,
416 struct iommu_iotlb_gather *iotlb_gather);
417 extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
418 struct scatterlist *sg,unsigned int nents, int prot);
419 extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
420 unsigned long iova, struct scatterlist *sg,
421 unsigned int nents, int prot);
422 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
423 extern void iommu_set_fault_handler(struct iommu_domain *domain,
424 iommu_fault_handler_t handler, void *token);
426 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
427 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
428 extern void generic_iommu_put_resv_regions(struct device *dev,
429 struct list_head *list);
430 extern void iommu_set_default_passthrough(bool cmd_line);
431 extern void iommu_set_default_translated(bool cmd_line);
432 extern bool iommu_default_passthrough(void);
433 extern struct iommu_resv_region *
434 iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
435 enum iommu_resv_type type);
436 extern int iommu_get_group_resv_regions(struct iommu_group *group,
437 struct list_head *head);
439 extern int iommu_attach_group(struct iommu_domain *domain,
440 struct iommu_group *group);
441 extern void iommu_detach_group(struct iommu_domain *domain,
442 struct iommu_group *group);
443 extern struct iommu_group *iommu_group_alloc(void);
444 extern void *iommu_group_get_iommudata(struct iommu_group *group);
445 extern void iommu_group_set_iommudata(struct iommu_group *group,
447 void (*release)(void *iommu_data));
448 extern int iommu_group_set_name(struct iommu_group *group, const char *name);
449 extern int iommu_group_add_device(struct iommu_group *group,
451 extern void iommu_group_remove_device(struct device *dev);
452 extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
453 int (*fn)(struct device *, void *));
454 extern struct iommu_group *iommu_group_get(struct device *dev);
455 extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
456 extern void iommu_group_put(struct iommu_group *group);
457 extern int iommu_group_register_notifier(struct iommu_group *group,
458 struct notifier_block *nb);
459 extern int iommu_group_unregister_notifier(struct iommu_group *group,
460 struct notifier_block *nb);
461 extern int iommu_register_device_fault_handler(struct device *dev,
462 iommu_dev_fault_handler_t handler,
465 extern int iommu_unregister_device_fault_handler(struct device *dev);
467 extern int iommu_report_device_fault(struct device *dev,
468 struct iommu_fault_event *evt);
469 extern int iommu_page_response(struct device *dev,
470 struct iommu_page_response *msg);
472 extern int iommu_group_id(struct iommu_group *group);
473 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
475 int iommu_enable_nesting(struct iommu_domain *domain);
476 int iommu_set_pgtable_quirks(struct iommu_domain *domain,
477 unsigned long quirks);
479 void iommu_set_dma_strict(bool val);
480 bool iommu_get_dma_strict(struct iommu_domain *domain);
482 extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
483 unsigned long iova, int flags);
485 static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
487 if (domain->ops->flush_iotlb_all)
488 domain->ops->flush_iotlb_all(domain);
491 static inline void iommu_iotlb_sync(struct iommu_domain *domain,
492 struct iommu_iotlb_gather *iotlb_gather)
494 if (domain->ops->iotlb_sync)
495 domain->ops->iotlb_sync(domain, iotlb_gather);
497 iommu_iotlb_gather_init(iotlb_gather);
500 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
501 struct iommu_iotlb_gather *gather,
502 unsigned long iova, size_t size)
504 unsigned long start = iova, end = start + size - 1;
507 * If the new page is disjoint from the current range or is mapped at
508 * a different granularity, then sync the TLB so that the gather
509 * structure can be rewritten.
511 if (gather->pgsize != size ||
512 end + 1 < gather->start || start > gather->end + 1) {
514 iommu_iotlb_sync(domain, gather);
515 gather->pgsize = size;
518 if (gather->end < end)
521 if (gather->start > start)
522 gather->start = start;
525 /* PCI device grouping function */
526 extern struct iommu_group *pci_device_group(struct device *dev);
527 /* Generic device grouping function */
528 extern struct iommu_group *generic_device_group(struct device *dev);
529 /* FSL-MC device grouping function */
530 struct iommu_group *fsl_mc_device_group(struct device *dev);
533 * struct iommu_fwspec - per-device IOMMU instance data
534 * @ops: ops for this device's IOMMU
535 * @iommu_fwnode: firmware handle for this device's IOMMU
536 * @flags: IOMMU_FWSPEC_* flags
537 * @num_ids: number of associated device IDs
538 * @ids: IDs which this device may present to the IOMMU
540 struct iommu_fwspec {
541 const struct iommu_ops *ops;
542 struct fwnode_handle *iommu_fwnode;
544 unsigned int num_ids;
548 /* ATS is supported */
549 #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
552 * struct iommu_sva - handle to a device-mm bond
558 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
559 const struct iommu_ops *ops);
560 void iommu_fwspec_free(struct device *dev);
561 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
562 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
564 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
567 return dev->iommu->fwspec;
572 static inline void dev_iommu_fwspec_set(struct device *dev,
573 struct iommu_fwspec *fwspec)
575 dev->iommu->fwspec = fwspec;
578 static inline void *dev_iommu_priv_get(struct device *dev)
581 return dev->iommu->priv;
586 static inline void dev_iommu_priv_set(struct device *dev, void *priv)
588 dev->iommu->priv = priv;
591 int iommu_probe_device(struct device *dev);
592 void iommu_release_device(struct device *dev);
594 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
595 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
596 bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
597 int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev);
598 void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev);
599 int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev);
601 struct iommu_sva *iommu_sva_bind_device(struct device *dev,
602 struct mm_struct *mm,
604 void iommu_sva_unbind_device(struct iommu_sva *handle);
605 u32 iommu_sva_get_pasid(struct iommu_sva *handle);
607 #else /* CONFIG_IOMMU_API */
610 struct iommu_group {};
611 struct iommu_fwspec {};
612 struct iommu_device {};
613 struct iommu_fault_param {};
614 struct iommu_iotlb_gather {};
616 static inline bool iommu_present(struct bus_type *bus)
621 static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
626 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
631 static inline struct iommu_group *iommu_group_get_by_id(int id)
636 static inline void iommu_domain_free(struct iommu_domain *domain)
640 static inline int iommu_attach_device(struct iommu_domain *domain,
646 static inline void iommu_detach_device(struct iommu_domain *domain,
651 static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
656 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
657 phys_addr_t paddr, size_t size, int prot)
662 static inline int iommu_map_atomic(struct iommu_domain *domain,
663 unsigned long iova, phys_addr_t paddr,
664 size_t size, int prot)
669 static inline size_t iommu_unmap(struct iommu_domain *domain,
670 unsigned long iova, size_t size)
675 static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
676 unsigned long iova, int gfp_order,
677 struct iommu_iotlb_gather *iotlb_gather)
682 static inline size_t iommu_map_sg(struct iommu_domain *domain,
683 unsigned long iova, struct scatterlist *sg,
684 unsigned int nents, int prot)
689 static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain,
690 unsigned long iova, struct scatterlist *sg,
691 unsigned int nents, int prot)
696 static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
700 static inline void iommu_iotlb_sync(struct iommu_domain *domain,
701 struct iommu_iotlb_gather *iotlb_gather)
705 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
710 static inline void iommu_set_fault_handler(struct iommu_domain *domain,
711 iommu_fault_handler_t handler, void *token)
715 static inline void iommu_get_resv_regions(struct device *dev,
716 struct list_head *list)
720 static inline void iommu_put_resv_regions(struct device *dev,
721 struct list_head *list)
725 static inline int iommu_get_group_resv_regions(struct iommu_group *group,
726 struct list_head *head)
731 static inline void iommu_set_default_passthrough(bool cmd_line)
735 static inline void iommu_set_default_translated(bool cmd_line)
739 static inline bool iommu_default_passthrough(void)
744 static inline int iommu_attach_group(struct iommu_domain *domain,
745 struct iommu_group *group)
750 static inline void iommu_detach_group(struct iommu_domain *domain,
751 struct iommu_group *group)
755 static inline struct iommu_group *iommu_group_alloc(void)
757 return ERR_PTR(-ENODEV);
760 static inline void *iommu_group_get_iommudata(struct iommu_group *group)
765 static inline void iommu_group_set_iommudata(struct iommu_group *group,
767 void (*release)(void *iommu_data))
771 static inline int iommu_group_set_name(struct iommu_group *group,
777 static inline int iommu_group_add_device(struct iommu_group *group,
783 static inline void iommu_group_remove_device(struct device *dev)
787 static inline int iommu_group_for_each_dev(struct iommu_group *group,
789 int (*fn)(struct device *, void *))
794 static inline struct iommu_group *iommu_group_get(struct device *dev)
799 static inline void iommu_group_put(struct iommu_group *group)
803 static inline int iommu_group_register_notifier(struct iommu_group *group,
804 struct notifier_block *nb)
809 static inline int iommu_group_unregister_notifier(struct iommu_group *group,
810 struct notifier_block *nb)
816 int iommu_register_device_fault_handler(struct device *dev,
817 iommu_dev_fault_handler_t handler,
823 static inline int iommu_unregister_device_fault_handler(struct device *dev)
829 int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
834 static inline int iommu_page_response(struct device *dev,
835 struct iommu_page_response *msg)
840 static inline int iommu_group_id(struct iommu_group *group)
845 static inline int iommu_set_pgtable_quirks(struct iommu_domain *domain,
846 unsigned long quirks)
851 static inline int iommu_device_register(struct iommu_device *iommu,
852 const struct iommu_ops *ops,
853 struct device *hwdev)
858 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
863 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
867 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
868 struct iommu_iotlb_gather *gather,
869 unsigned long iova, size_t size)
873 static inline void iommu_device_unregister(struct iommu_device *iommu)
877 static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
878 struct device *parent,
879 const struct attribute_group **groups,
880 const char *fmt, ...)
885 static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
889 static inline int iommu_device_link(struct device *dev, struct device *link)
894 static inline void iommu_device_unlink(struct device *dev, struct device *link)
898 static inline int iommu_fwspec_init(struct device *dev,
899 struct fwnode_handle *iommu_fwnode,
900 const struct iommu_ops *ops)
905 static inline void iommu_fwspec_free(struct device *dev)
909 static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
916 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
922 iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
928 iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
934 iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
940 iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev)
946 iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev)
951 iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
956 static inline struct iommu_sva *
957 iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
962 static inline void iommu_sva_unbind_device(struct iommu_sva *handle)
966 static inline u32 iommu_sva_get_pasid(struct iommu_sva *handle)
968 return IOMMU_PASID_INVALID;
972 iommu_uapi_cache_invalidate(struct iommu_domain *domain,
974 struct iommu_cache_invalidate_info *inv_info)
979 static inline int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain,
980 struct device *dev, void __user *udata)
985 static inline int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
986 struct device *dev, void __user *udata)
991 static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
998 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
1002 #endif /* CONFIG_IOMMU_API */
1005 * iommu_map_sgtable - Map the given buffer to the IOMMU domain
1006 * @domain: The IOMMU domain to perform the mapping
1007 * @iova: The start address to map the buffer
1008 * @sgt: The sg_table object describing the buffer
1009 * @prot: IOMMU protection bits
1011 * Creates a mapping at @iova for the buffer described by a scatterlist
1012 * stored in the given sg_table object in the provided IOMMU domain.
1014 static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
1015 unsigned long iova, struct sg_table *sgt, int prot)
1017 return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
1020 #ifdef CONFIG_IOMMU_DEBUGFS
1021 extern struct dentry *iommu_debugfs_dir;
1022 void iommu_debugfs_setup(void);
1024 static inline void iommu_debugfs_setup(void) {}
1027 #endif /* __LINUX_IOMMU_H */