1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
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)
35 * Non-coherent masters can use this page protection flag to set cacheable
36 * memory attributes for only a transparent outer level of cache, also known as
37 * the last-level or system cache.
39 #define IOMMU_SYS_CACHE_ONLY (1 << 6)
46 struct notifier_block;
48 struct iommu_fault_event;
50 /* iommu fault flags */
51 #define IOMMU_FAULT_READ 0x0
52 #define IOMMU_FAULT_WRITE 0x1
54 typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
55 struct device *, unsigned long, int, void *);
56 typedef int (*iommu_mm_exit_handler_t)(struct device *dev, struct iommu_sva *,
58 typedef int (*iommu_dev_fault_handler_t)(struct iommu_fault *, void *);
60 struct iommu_domain_geometry {
61 dma_addr_t aperture_start; /* First address that can be mapped */
62 dma_addr_t aperture_end; /* Last address that can be mapped */
63 bool force_aperture; /* DMA only allowed in mappable range? */
66 /* Domain feature flags */
67 #define __IOMMU_DOMAIN_PAGING (1U << 0) /* Support for iommu_map/unmap */
68 #define __IOMMU_DOMAIN_DMA_API (1U << 1) /* Domain for use in DMA-API
70 #define __IOMMU_DOMAIN_PT (1U << 2) /* Domain is identity mapped */
73 * This are the possible domain-types
75 * IOMMU_DOMAIN_BLOCKED - All DMA is blocked, can be used to isolate
77 * IOMMU_DOMAIN_IDENTITY - DMA addresses are system physical addresses
78 * IOMMU_DOMAIN_UNMANAGED - DMA mappings managed by IOMMU-API user, used
80 * IOMMU_DOMAIN_DMA - Internally used for DMA-API implementations.
81 * This flag allows IOMMU drivers to implement
82 * certain optimizations for these domains
84 #define IOMMU_DOMAIN_BLOCKED (0U)
85 #define IOMMU_DOMAIN_IDENTITY (__IOMMU_DOMAIN_PT)
86 #define IOMMU_DOMAIN_UNMANAGED (__IOMMU_DOMAIN_PAGING)
87 #define IOMMU_DOMAIN_DMA (__IOMMU_DOMAIN_PAGING | \
88 __IOMMU_DOMAIN_DMA_API)
92 const struct iommu_ops *ops;
93 unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */
94 iommu_fault_handler_t handler;
96 struct iommu_domain_geometry geometry;
101 IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA
103 IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */
104 IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */
108 * Following constraints are specifc to FSL_PAMUV1:
109 * -aperture must be power of 2, and naturally aligned
110 * -number of windows must be power of 2, and address space size
111 * of each window is determined by aperture size / # of windows
112 * -the actual size of the mapped region of a window must be power
113 * of 2 starting with 4KB and physical address must be naturally
115 * DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints.
116 * The caller can invoke iommu_domain_get_attr to check if the underlying
117 * iommu implementation supports these constraints.
121 DOMAIN_ATTR_GEOMETRY,
124 DOMAIN_ATTR_FSL_PAMU_STASH,
125 DOMAIN_ATTR_FSL_PAMU_ENABLE,
126 DOMAIN_ATTR_FSL_PAMUV1,
127 DOMAIN_ATTR_NESTING, /* two stages of translation */
128 DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE,
132 /* These are the possible reserved region types */
133 enum iommu_resv_type {
134 /* Memory regions which must be mapped 1:1 at all times */
137 * Memory regions which are advertised to be 1:1 but are
138 * commonly considered relaxable in some conditions,
139 * for instance in device assignment use case (USB, Graphics)
141 IOMMU_RESV_DIRECT_RELAXABLE,
142 /* Arbitrary "never map this or give it to a device" address ranges */
144 /* Hardware MSI region (untranslated) */
146 /* Software-managed MSI translation window */
151 * struct iommu_resv_region - descriptor for a reserved memory region
152 * @list: Linked list pointers
153 * @start: System physical start address of the region
154 * @length: Length of the region in bytes
155 * @prot: IOMMU Protection flags (READ/WRITE/...)
156 * @type: Type of the reserved region
158 struct iommu_resv_region {
159 struct list_head list;
163 enum iommu_resv_type type;
166 /* Per device IOMMU features */
167 enum iommu_dev_features {
168 IOMMU_DEV_FEAT_AUX, /* Aux-domain feature */
169 IOMMU_DEV_FEAT_SVA, /* Shared Virtual Addresses */
172 #define IOMMU_PASID_INVALID (-1U)
175 * struct iommu_sva_ops - device driver callbacks for an SVA context
177 * @mm_exit: called when the mm is about to be torn down by exit_mmap. After
178 * @mm_exit returns, the device must not issue any more transaction
179 * with the PASID given as argument.
181 * The @mm_exit handler is allowed to sleep. Be careful about the
182 * locks taken in @mm_exit, because they might lead to deadlocks if
183 * they are also held when dropping references to the mm. Consider the
184 * following call chain:
185 * mutex_lock(A); mmput(mm) -> exit_mm() -> @mm_exit() -> mutex_lock(A)
186 * Using mmput_async() prevents this scenario.
189 struct iommu_sva_ops {
190 iommu_mm_exit_handler_t mm_exit;
193 #ifdef CONFIG_IOMMU_API
196 * struct iommu_iotlb_gather - Range information for a pending IOTLB flush
198 * @start: IOVA representing the start of the range to be flushed
199 * @end: IOVA representing the end of the range to be flushed (exclusive)
200 * @pgsize: The interval at which to perform the flush
202 * This structure is intended to be updated by multiple calls to the
203 * ->unmap() function in struct iommu_ops before eventually being passed
204 * into ->iotlb_sync().
206 struct iommu_iotlb_gather {
213 * struct iommu_ops - iommu ops and capabilities
214 * @capable: check capability
215 * @domain_alloc: allocate iommu domain
216 * @domain_free: free iommu domain
217 * @attach_dev: attach device to an iommu domain
218 * @detach_dev: detach device from an iommu domain
219 * @map: map a physically contiguous memory region to an iommu domain
220 * @unmap: unmap a physically contiguous memory region from an iommu domain
221 * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain
222 * @iotlb_sync_map: Sync mappings created recently using @map to the hardware
223 * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
225 * @iova_to_phys: translate iova to physical address
226 * @add_device: add device to iommu grouping
227 * @remove_device: remove device from iommu grouping
228 * @device_group: find iommu group for a particular device
229 * @domain_get_attr: Query domain attributes
230 * @domain_set_attr: Change domain attributes
231 * @get_resv_regions: Request list of reserved regions for a device
232 * @put_resv_regions: Free list of reserved regions for a device
233 * @apply_resv_region: Temporary helper call-back for iova reserved ranges
234 * @domain_window_enable: Configure and enable a particular window for a domain
235 * @domain_window_disable: Disable a particular window for a domain
236 * @of_xlate: add OF master IDs to iommu grouping
237 * @is_attach_deferred: Check if domain attach should be deferred from iommu
238 * driver init to device driver init (default no)
239 * @dev_has/enable/disable_feat: per device entries to check/enable/disable
240 * iommu specific features.
241 * @dev_feat_enabled: check enabled feature
242 * @aux_attach/detach_dev: aux-domain specific attach/detach entries.
243 * @aux_get_pasid: get the pasid given an aux-domain
244 * @sva_bind: Bind process address space to device
245 * @sva_unbind: Unbind process address space from device
246 * @sva_get_pasid: Get PASID associated to a SVA handle
247 * @page_response: handle page request response
248 * @cache_invalidate: invalidate translation caches
249 * @sva_bind_gpasid: bind guest pasid and mm
250 * @sva_unbind_gpasid: unbind guest pasid and mm
251 * @pgsize_bitmap: bitmap of all possible supported page sizes
252 * @owner: Driver module providing these ops
255 bool (*capable)(enum iommu_cap);
257 /* Domain allocation and freeing by the iommu driver */
258 struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);
259 void (*domain_free)(struct iommu_domain *);
261 int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
262 void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
263 int (*map)(struct iommu_domain *domain, unsigned long iova,
264 phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
265 size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
266 size_t size, struct iommu_iotlb_gather *iotlb_gather);
267 void (*flush_iotlb_all)(struct iommu_domain *domain);
268 void (*iotlb_sync_map)(struct iommu_domain *domain);
269 void (*iotlb_sync)(struct iommu_domain *domain,
270 struct iommu_iotlb_gather *iotlb_gather);
271 phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
272 int (*add_device)(struct device *dev);
273 void (*remove_device)(struct device *dev);
274 struct iommu_group *(*device_group)(struct device *dev);
275 int (*domain_get_attr)(struct iommu_domain *domain,
276 enum iommu_attr attr, void *data);
277 int (*domain_set_attr)(struct iommu_domain *domain,
278 enum iommu_attr attr, void *data);
280 /* Request/Free a list of reserved regions for a device */
281 void (*get_resv_regions)(struct device *dev, struct list_head *list);
282 void (*put_resv_regions)(struct device *dev, struct list_head *list);
283 void (*apply_resv_region)(struct device *dev,
284 struct iommu_domain *domain,
285 struct iommu_resv_region *region);
287 /* Window handling functions */
288 int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
289 phys_addr_t paddr, u64 size, int prot);
290 void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr);
292 int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
293 bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev);
295 /* Per device IOMMU features */
296 bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f);
297 bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f);
298 int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
299 int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
301 /* Aux-domain specific attach/detach entries */
302 int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev);
303 void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev);
304 int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev);
306 struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm,
308 void (*sva_unbind)(struct iommu_sva *handle);
309 int (*sva_get_pasid)(struct iommu_sva *handle);
311 int (*page_response)(struct device *dev,
312 struct iommu_fault_event *evt,
313 struct iommu_page_response *msg);
314 int (*cache_invalidate)(struct iommu_domain *domain, struct device *dev,
315 struct iommu_cache_invalidate_info *inv_info);
316 int (*sva_bind_gpasid)(struct iommu_domain *domain,
317 struct device *dev, struct iommu_gpasid_bind_data *data);
319 int (*sva_unbind_gpasid)(struct device *dev, int pasid);
321 unsigned long pgsize_bitmap;
322 struct module *owner;
326 * struct iommu_device - IOMMU core representation of one IOMMU hardware
328 * @list: Used by the iommu-core to keep a list of registered iommus
329 * @ops: iommu-ops for talking to this iommu
330 * @dev: struct device for sysfs handling
332 struct iommu_device {
333 struct list_head list;
334 const struct iommu_ops *ops;
335 struct fwnode_handle *fwnode;
340 * struct iommu_fault_event - Generic fault event
342 * Can represent recoverable faults such as a page requests or
343 * unrecoverable faults such as DMA or IRQ remapping faults.
345 * @fault: fault descriptor
346 * @list: pending fault event list, used for tracking responses
348 struct iommu_fault_event {
349 struct iommu_fault fault;
350 struct list_head list;
354 * struct iommu_fault_param - per-device IOMMU fault data
355 * @handler: Callback function to handle IOMMU faults at device level
356 * @data: handler private data
357 * @faults: holds the pending faults which needs response
358 * @lock: protect pending faults list
360 struct iommu_fault_param {
361 iommu_dev_fault_handler_t handler;
363 struct list_head faults;
368 * struct dev_iommu - Collection of per-device IOMMU data
370 * @fault_param: IOMMU detected device fault reporting data
371 * @fwspec: IOMMU fwspec data
372 * @priv: IOMMU Driver private data
374 * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
375 * struct iommu_group *iommu_group;
379 struct iommu_fault_param *fault_param;
380 struct iommu_fwspec *fwspec;
384 int iommu_device_register(struct iommu_device *iommu);
385 void iommu_device_unregister(struct iommu_device *iommu);
386 int iommu_device_sysfs_add(struct iommu_device *iommu,
387 struct device *parent,
388 const struct attribute_group **groups,
389 const char *fmt, ...) __printf(4, 5);
390 void iommu_device_sysfs_remove(struct iommu_device *iommu);
391 int iommu_device_link(struct iommu_device *iommu, struct device *link);
392 void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
394 static inline void __iommu_device_set_ops(struct iommu_device *iommu,
395 const struct iommu_ops *ops)
400 #define iommu_device_set_ops(iommu, ops) \
402 struct iommu_ops *__ops = (struct iommu_ops *)(ops); \
403 __ops->owner = THIS_MODULE; \
404 __iommu_device_set_ops(iommu, __ops); \
407 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
408 struct fwnode_handle *fwnode)
410 iommu->fwnode = fwnode;
413 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
415 return (struct iommu_device *)dev_get_drvdata(dev);
418 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
420 *gather = (struct iommu_iotlb_gather) {
425 #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
426 #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
427 #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
428 #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
429 #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
430 #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
432 extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
433 extern bool iommu_present(struct bus_type *bus);
434 extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
435 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
436 extern struct iommu_group *iommu_group_get_by_id(int id);
437 extern void iommu_domain_free(struct iommu_domain *domain);
438 extern int iommu_attach_device(struct iommu_domain *domain,
440 extern void iommu_detach_device(struct iommu_domain *domain,
442 extern int iommu_cache_invalidate(struct iommu_domain *domain,
444 struct iommu_cache_invalidate_info *inv_info);
445 extern int iommu_sva_bind_gpasid(struct iommu_domain *domain,
446 struct device *dev, struct iommu_gpasid_bind_data *data);
447 extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
448 struct device *dev, ioasid_t pasid);
449 extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
450 extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
451 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
452 phys_addr_t paddr, size_t size, int prot);
453 extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
454 phys_addr_t paddr, size_t size, int prot);
455 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
457 extern size_t iommu_unmap_fast(struct iommu_domain *domain,
458 unsigned long iova, size_t size,
459 struct iommu_iotlb_gather *iotlb_gather);
460 extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
461 struct scatterlist *sg,unsigned int nents, int prot);
462 extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
463 unsigned long iova, struct scatterlist *sg,
464 unsigned int nents, int prot);
465 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
466 extern void iommu_set_fault_handler(struct iommu_domain *domain,
467 iommu_fault_handler_t handler, void *token);
469 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
470 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
471 extern void generic_iommu_put_resv_regions(struct device *dev,
472 struct list_head *list);
473 extern int iommu_request_dm_for_dev(struct device *dev);
474 extern int iommu_request_dma_domain_for_dev(struct device *dev);
475 extern void iommu_set_default_passthrough(bool cmd_line);
476 extern void iommu_set_default_translated(bool cmd_line);
477 extern bool iommu_default_passthrough(void);
478 extern struct iommu_resv_region *
479 iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
480 enum iommu_resv_type type);
481 extern int iommu_get_group_resv_regions(struct iommu_group *group,
482 struct list_head *head);
484 extern int iommu_attach_group(struct iommu_domain *domain,
485 struct iommu_group *group);
486 extern void iommu_detach_group(struct iommu_domain *domain,
487 struct iommu_group *group);
488 extern struct iommu_group *iommu_group_alloc(void);
489 extern void *iommu_group_get_iommudata(struct iommu_group *group);
490 extern void iommu_group_set_iommudata(struct iommu_group *group,
492 void (*release)(void *iommu_data));
493 extern int iommu_group_set_name(struct iommu_group *group, const char *name);
494 extern int iommu_group_add_device(struct iommu_group *group,
496 extern void iommu_group_remove_device(struct device *dev);
497 extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
498 int (*fn)(struct device *, void *));
499 extern struct iommu_group *iommu_group_get(struct device *dev);
500 extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
501 extern void iommu_group_put(struct iommu_group *group);
502 extern int iommu_group_register_notifier(struct iommu_group *group,
503 struct notifier_block *nb);
504 extern int iommu_group_unregister_notifier(struct iommu_group *group,
505 struct notifier_block *nb);
506 extern int iommu_register_device_fault_handler(struct device *dev,
507 iommu_dev_fault_handler_t handler,
510 extern int iommu_unregister_device_fault_handler(struct device *dev);
512 extern int iommu_report_device_fault(struct device *dev,
513 struct iommu_fault_event *evt);
514 extern int iommu_page_response(struct device *dev,
515 struct iommu_page_response *msg);
517 extern int iommu_group_id(struct iommu_group *group);
518 extern struct iommu_group *iommu_group_get_for_dev(struct device *dev);
519 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
521 extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
523 extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
526 /* Window handling function prototypes */
527 extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
528 phys_addr_t offset, u64 size,
530 extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
532 extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
533 unsigned long iova, int flags);
535 static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
537 if (domain->ops->flush_iotlb_all)
538 domain->ops->flush_iotlb_all(domain);
541 static inline void iommu_tlb_sync(struct iommu_domain *domain,
542 struct iommu_iotlb_gather *iotlb_gather)
544 if (domain->ops->iotlb_sync)
545 domain->ops->iotlb_sync(domain, iotlb_gather);
547 iommu_iotlb_gather_init(iotlb_gather);
550 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
551 struct iommu_iotlb_gather *gather,
552 unsigned long iova, size_t size)
554 unsigned long start = iova, end = start + size;
557 * If the new page is disjoint from the current range or is mapped at
558 * a different granularity, then sync the TLB so that the gather
559 * structure can be rewritten.
561 if (gather->pgsize != size ||
562 end < gather->start || start > gather->end) {
564 iommu_tlb_sync(domain, gather);
565 gather->pgsize = size;
568 if (gather->end < end)
571 if (gather->start > start)
572 gather->start = start;
575 /* PCI device grouping function */
576 extern struct iommu_group *pci_device_group(struct device *dev);
577 /* Generic device grouping function */
578 extern struct iommu_group *generic_device_group(struct device *dev);
579 /* FSL-MC device grouping function */
580 struct iommu_group *fsl_mc_device_group(struct device *dev);
583 * struct iommu_fwspec - per-device IOMMU instance data
584 * @ops: ops for this device's IOMMU
585 * @iommu_fwnode: firmware handle for this device's IOMMU
586 * @iommu_priv: IOMMU driver private data for this device
587 * @num_pasid_bits: number of PASID bits supported by this device
588 * @num_ids: number of associated device IDs
589 * @ids: IDs which this device may present to the IOMMU
591 struct iommu_fwspec {
592 const struct iommu_ops *ops;
593 struct fwnode_handle *iommu_fwnode;
596 unsigned int num_ids;
600 /* ATS is supported */
601 #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
604 * struct iommu_sva - handle to a device-mm bond
608 const struct iommu_sva_ops *ops;
611 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
612 const struct iommu_ops *ops);
613 void iommu_fwspec_free(struct device *dev);
614 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
615 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
617 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
620 return dev->iommu->fwspec;
625 static inline void dev_iommu_fwspec_set(struct device *dev,
626 struct iommu_fwspec *fwspec)
628 dev->iommu->fwspec = fwspec;
631 static inline void *dev_iommu_priv_get(struct device *dev)
633 return dev->iommu->priv;
636 static inline void dev_iommu_priv_set(struct device *dev, void *priv)
638 dev->iommu->priv = priv;
641 int iommu_probe_device(struct device *dev);
642 void iommu_release_device(struct device *dev);
644 bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features f);
645 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
646 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
647 bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
648 int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev);
649 void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev);
650 int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev);
652 struct iommu_sva *iommu_sva_bind_device(struct device *dev,
653 struct mm_struct *mm,
655 void iommu_sva_unbind_device(struct iommu_sva *handle);
656 int iommu_sva_set_ops(struct iommu_sva *handle,
657 const struct iommu_sva_ops *ops);
658 int iommu_sva_get_pasid(struct iommu_sva *handle);
660 #else /* CONFIG_IOMMU_API */
663 struct iommu_group {};
664 struct iommu_fwspec {};
665 struct iommu_device {};
666 struct iommu_fault_param {};
667 struct iommu_iotlb_gather {};
669 static inline bool iommu_present(struct bus_type *bus)
674 static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
679 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
684 static inline struct iommu_group *iommu_group_get_by_id(int id)
689 static inline void iommu_domain_free(struct iommu_domain *domain)
693 static inline int iommu_attach_device(struct iommu_domain *domain,
699 static inline void iommu_detach_device(struct iommu_domain *domain,
704 static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
709 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
710 phys_addr_t paddr, size_t size, int prot)
715 static inline int iommu_map_atomic(struct iommu_domain *domain,
716 unsigned long iova, phys_addr_t paddr,
717 size_t size, int prot)
722 static inline size_t iommu_unmap(struct iommu_domain *domain,
723 unsigned long iova, size_t size)
728 static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
729 unsigned long iova, int gfp_order,
730 struct iommu_iotlb_gather *iotlb_gather)
735 static inline size_t iommu_map_sg(struct iommu_domain *domain,
736 unsigned long iova, struct scatterlist *sg,
737 unsigned int nents, int prot)
742 static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain,
743 unsigned long iova, struct scatterlist *sg,
744 unsigned int nents, int prot)
749 static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
753 static inline void iommu_tlb_sync(struct iommu_domain *domain,
754 struct iommu_iotlb_gather *iotlb_gather)
758 static inline int iommu_domain_window_enable(struct iommu_domain *domain,
759 u32 wnd_nr, phys_addr_t paddr,
765 static inline void iommu_domain_window_disable(struct iommu_domain *domain,
770 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
775 static inline void iommu_set_fault_handler(struct iommu_domain *domain,
776 iommu_fault_handler_t handler, void *token)
780 static inline void iommu_get_resv_regions(struct device *dev,
781 struct list_head *list)
785 static inline void iommu_put_resv_regions(struct device *dev,
786 struct list_head *list)
790 static inline int iommu_get_group_resv_regions(struct iommu_group *group,
791 struct list_head *head)
796 static inline int iommu_request_dm_for_dev(struct device *dev)
801 static inline int iommu_request_dma_domain_for_dev(struct device *dev)
806 static inline void iommu_set_default_passthrough(bool cmd_line)
810 static inline void iommu_set_default_translated(bool cmd_line)
814 static inline bool iommu_default_passthrough(void)
819 static inline int iommu_attach_group(struct iommu_domain *domain,
820 struct iommu_group *group)
825 static inline void iommu_detach_group(struct iommu_domain *domain,
826 struct iommu_group *group)
830 static inline struct iommu_group *iommu_group_alloc(void)
832 return ERR_PTR(-ENODEV);
835 static inline void *iommu_group_get_iommudata(struct iommu_group *group)
840 static inline void iommu_group_set_iommudata(struct iommu_group *group,
842 void (*release)(void *iommu_data))
846 static inline int iommu_group_set_name(struct iommu_group *group,
852 static inline int iommu_group_add_device(struct iommu_group *group,
858 static inline void iommu_group_remove_device(struct device *dev)
862 static inline int iommu_group_for_each_dev(struct iommu_group *group,
864 int (*fn)(struct device *, void *))
869 static inline struct iommu_group *iommu_group_get(struct device *dev)
874 static inline void iommu_group_put(struct iommu_group *group)
878 static inline int iommu_group_register_notifier(struct iommu_group *group,
879 struct notifier_block *nb)
884 static inline int iommu_group_unregister_notifier(struct iommu_group *group,
885 struct notifier_block *nb)
891 int iommu_register_device_fault_handler(struct device *dev,
892 iommu_dev_fault_handler_t handler,
898 static inline int iommu_unregister_device_fault_handler(struct device *dev)
904 int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
909 static inline int iommu_page_response(struct device *dev,
910 struct iommu_page_response *msg)
915 static inline int iommu_group_id(struct iommu_group *group)
920 static inline int iommu_domain_get_attr(struct iommu_domain *domain,
921 enum iommu_attr attr, void *data)
926 static inline int iommu_domain_set_attr(struct iommu_domain *domain,
927 enum iommu_attr attr, void *data)
932 static inline int iommu_device_register(struct iommu_device *iommu)
937 static inline void iommu_device_set_ops(struct iommu_device *iommu,
938 const struct iommu_ops *ops)
942 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
943 struct fwnode_handle *fwnode)
947 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
952 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
956 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
957 struct iommu_iotlb_gather *gather,
958 unsigned long iova, size_t size)
962 static inline void iommu_device_unregister(struct iommu_device *iommu)
966 static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
967 struct device *parent,
968 const struct attribute_group **groups,
969 const char *fmt, ...)
974 static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
978 static inline int iommu_device_link(struct device *dev, struct device *link)
983 static inline void iommu_device_unlink(struct device *dev, struct device *link)
987 static inline int iommu_fwspec_init(struct device *dev,
988 struct fwnode_handle *iommu_fwnode,
989 const struct iommu_ops *ops)
994 static inline void iommu_fwspec_free(struct device *dev)
998 static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
1005 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
1011 iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat)
1017 iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
1023 iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
1029 iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
1035 iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev)
1041 iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev)
1046 iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
1051 static inline struct iommu_sva *
1052 iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
1057 static inline void iommu_sva_unbind_device(struct iommu_sva *handle)
1061 static inline int iommu_sva_set_ops(struct iommu_sva *handle,
1062 const struct iommu_sva_ops *ops)
1067 static inline int iommu_sva_get_pasid(struct iommu_sva *handle)
1069 return IOMMU_PASID_INVALID;
1073 iommu_cache_invalidate(struct iommu_domain *domain,
1075 struct iommu_cache_invalidate_info *inv_info)
1079 static inline int iommu_sva_bind_gpasid(struct iommu_domain *domain,
1080 struct device *dev, struct iommu_gpasid_bind_data *data)
1085 static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
1086 struct device *dev, int pasid)
1091 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
1095 #endif /* CONFIG_IOMMU_API */
1097 #ifdef CONFIG_IOMMU_DEBUGFS
1098 extern struct dentry *iommu_debugfs_dir;
1099 void iommu_debugfs_setup(void);
1101 static inline void iommu_debugfs_setup(void) {}
1104 #endif /* __LINUX_IOMMU_H */