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)
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 iommu_param - collection of per-device IOMMU data
370 * @fault_param: IOMMU detected device fault reporting data
372 * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
373 * struct iommu_group *iommu_group;
374 * struct iommu_fwspec *iommu_fwspec;
378 struct iommu_fault_param *fault_param;
381 int iommu_device_register(struct iommu_device *iommu);
382 void iommu_device_unregister(struct iommu_device *iommu);
383 int iommu_device_sysfs_add(struct iommu_device *iommu,
384 struct device *parent,
385 const struct attribute_group **groups,
386 const char *fmt, ...) __printf(4, 5);
387 void iommu_device_sysfs_remove(struct iommu_device *iommu);
388 int iommu_device_link(struct iommu_device *iommu, struct device *link);
389 void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
391 static inline void __iommu_device_set_ops(struct iommu_device *iommu,
392 const struct iommu_ops *ops)
397 #define iommu_device_set_ops(iommu, ops) \
399 struct iommu_ops *__ops = (struct iommu_ops *)(ops); \
400 __ops->owner = THIS_MODULE; \
401 __iommu_device_set_ops(iommu, __ops); \
404 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
405 struct fwnode_handle *fwnode)
407 iommu->fwnode = fwnode;
410 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
412 return (struct iommu_device *)dev_get_drvdata(dev);
415 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
417 *gather = (struct iommu_iotlb_gather) {
422 #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
423 #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
424 #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
425 #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
426 #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
427 #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
429 extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
430 extern bool iommu_present(struct bus_type *bus);
431 extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
432 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
433 extern struct iommu_group *iommu_group_get_by_id(int id);
434 extern void iommu_domain_free(struct iommu_domain *domain);
435 extern int iommu_attach_device(struct iommu_domain *domain,
437 extern void iommu_detach_device(struct iommu_domain *domain,
439 extern int iommu_cache_invalidate(struct iommu_domain *domain,
441 struct iommu_cache_invalidate_info *inv_info);
442 extern int iommu_sva_bind_gpasid(struct iommu_domain *domain,
443 struct device *dev, struct iommu_gpasid_bind_data *data);
444 extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
445 struct device *dev, ioasid_t pasid);
446 extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
447 extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
448 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
449 phys_addr_t paddr, size_t size, int prot);
450 extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
451 phys_addr_t paddr, size_t size, int prot);
452 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
454 extern size_t iommu_unmap_fast(struct iommu_domain *domain,
455 unsigned long iova, size_t size,
456 struct iommu_iotlb_gather *iotlb_gather);
457 extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
458 struct scatterlist *sg,unsigned int nents, int prot);
459 extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
460 unsigned long iova, struct scatterlist *sg,
461 unsigned int nents, int prot);
462 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
463 extern void iommu_set_fault_handler(struct iommu_domain *domain,
464 iommu_fault_handler_t handler, void *token);
466 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
467 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
468 extern int iommu_request_dm_for_dev(struct device *dev);
469 extern int iommu_request_dma_domain_for_dev(struct device *dev);
470 extern void iommu_set_default_passthrough(bool cmd_line);
471 extern void iommu_set_default_translated(bool cmd_line);
472 extern bool iommu_default_passthrough(void);
473 extern struct iommu_resv_region *
474 iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
475 enum iommu_resv_type type);
476 extern int iommu_get_group_resv_regions(struct iommu_group *group,
477 struct list_head *head);
479 extern int iommu_attach_group(struct iommu_domain *domain,
480 struct iommu_group *group);
481 extern void iommu_detach_group(struct iommu_domain *domain,
482 struct iommu_group *group);
483 extern struct iommu_group *iommu_group_alloc(void);
484 extern void *iommu_group_get_iommudata(struct iommu_group *group);
485 extern void iommu_group_set_iommudata(struct iommu_group *group,
487 void (*release)(void *iommu_data));
488 extern int iommu_group_set_name(struct iommu_group *group, const char *name);
489 extern int iommu_group_add_device(struct iommu_group *group,
491 extern void iommu_group_remove_device(struct device *dev);
492 extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
493 int (*fn)(struct device *, void *));
494 extern struct iommu_group *iommu_group_get(struct device *dev);
495 extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
496 extern void iommu_group_put(struct iommu_group *group);
497 extern int iommu_group_register_notifier(struct iommu_group *group,
498 struct notifier_block *nb);
499 extern int iommu_group_unregister_notifier(struct iommu_group *group,
500 struct notifier_block *nb);
501 extern int iommu_register_device_fault_handler(struct device *dev,
502 iommu_dev_fault_handler_t handler,
505 extern int iommu_unregister_device_fault_handler(struct device *dev);
507 extern int iommu_report_device_fault(struct device *dev,
508 struct iommu_fault_event *evt);
509 extern int iommu_page_response(struct device *dev,
510 struct iommu_page_response *msg);
512 extern int iommu_group_id(struct iommu_group *group);
513 extern struct iommu_group *iommu_group_get_for_dev(struct device *dev);
514 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
516 extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
518 extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
521 /* Window handling function prototypes */
522 extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
523 phys_addr_t offset, u64 size,
525 extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
527 extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
528 unsigned long iova, int flags);
530 static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
532 if (domain->ops->flush_iotlb_all)
533 domain->ops->flush_iotlb_all(domain);
536 static inline void iommu_tlb_sync(struct iommu_domain *domain,
537 struct iommu_iotlb_gather *iotlb_gather)
539 if (domain->ops->iotlb_sync)
540 domain->ops->iotlb_sync(domain, iotlb_gather);
542 iommu_iotlb_gather_init(iotlb_gather);
545 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
546 struct iommu_iotlb_gather *gather,
547 unsigned long iova, size_t size)
549 unsigned long start = iova, end = start + size;
552 * If the new page is disjoint from the current range or is mapped at
553 * a different granularity, then sync the TLB so that the gather
554 * structure can be rewritten.
556 if (gather->pgsize != size ||
557 end < gather->start || start > gather->end) {
559 iommu_tlb_sync(domain, gather);
560 gather->pgsize = size;
563 if (gather->end < end)
566 if (gather->start > start)
567 gather->start = start;
570 /* PCI device grouping function */
571 extern struct iommu_group *pci_device_group(struct device *dev);
572 /* Generic device grouping function */
573 extern struct iommu_group *generic_device_group(struct device *dev);
574 /* FSL-MC device grouping function */
575 struct iommu_group *fsl_mc_device_group(struct device *dev);
578 * struct iommu_fwspec - per-device IOMMU instance data
579 * @ops: ops for this device's IOMMU
580 * @iommu_fwnode: firmware handle for this device's IOMMU
581 * @iommu_priv: IOMMU driver private data for this device
582 * @num_pasid_bits: number of PASID bits supported by this device
583 * @num_ids: number of associated device IDs
584 * @ids: IDs which this device may present to the IOMMU
586 struct iommu_fwspec {
587 const struct iommu_ops *ops;
588 struct fwnode_handle *iommu_fwnode;
592 unsigned int num_ids;
596 /* ATS is supported */
597 #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
600 * struct iommu_sva - handle to a device-mm bond
604 const struct iommu_sva_ops *ops;
607 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
608 const struct iommu_ops *ops);
609 void iommu_fwspec_free(struct device *dev);
610 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
611 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
613 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
615 return dev->iommu_fwspec;
618 static inline void dev_iommu_fwspec_set(struct device *dev,
619 struct iommu_fwspec *fwspec)
621 dev->iommu_fwspec = fwspec;
624 int iommu_probe_device(struct device *dev);
625 void iommu_release_device(struct device *dev);
627 bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features f);
628 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
629 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
630 bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
631 int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev);
632 void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev);
633 int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev);
635 struct iommu_sva *iommu_sva_bind_device(struct device *dev,
636 struct mm_struct *mm,
638 void iommu_sva_unbind_device(struct iommu_sva *handle);
639 int iommu_sva_set_ops(struct iommu_sva *handle,
640 const struct iommu_sva_ops *ops);
641 int iommu_sva_get_pasid(struct iommu_sva *handle);
643 #else /* CONFIG_IOMMU_API */
646 struct iommu_group {};
647 struct iommu_fwspec {};
648 struct iommu_device {};
649 struct iommu_fault_param {};
650 struct iommu_iotlb_gather {};
652 static inline bool iommu_present(struct bus_type *bus)
657 static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
662 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
667 static inline struct iommu_group *iommu_group_get_by_id(int id)
672 static inline void iommu_domain_free(struct iommu_domain *domain)
676 static inline int iommu_attach_device(struct iommu_domain *domain,
682 static inline void iommu_detach_device(struct iommu_domain *domain,
687 static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
692 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
693 phys_addr_t paddr, size_t size, int prot)
698 static inline int iommu_map_atomic(struct iommu_domain *domain,
699 unsigned long iova, phys_addr_t paddr,
700 size_t size, int prot)
705 static inline size_t iommu_unmap(struct iommu_domain *domain,
706 unsigned long iova, size_t size)
711 static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
712 unsigned long iova, int gfp_order,
713 struct iommu_iotlb_gather *iotlb_gather)
718 static inline size_t iommu_map_sg(struct iommu_domain *domain,
719 unsigned long iova, struct scatterlist *sg,
720 unsigned int nents, int prot)
725 static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain,
726 unsigned long iova, struct scatterlist *sg,
727 unsigned int nents, int prot)
732 static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
736 static inline void iommu_tlb_sync(struct iommu_domain *domain,
737 struct iommu_iotlb_gather *iotlb_gather)
741 static inline int iommu_domain_window_enable(struct iommu_domain *domain,
742 u32 wnd_nr, phys_addr_t paddr,
748 static inline void iommu_domain_window_disable(struct iommu_domain *domain,
753 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
758 static inline void iommu_set_fault_handler(struct iommu_domain *domain,
759 iommu_fault_handler_t handler, void *token)
763 static inline void iommu_get_resv_regions(struct device *dev,
764 struct list_head *list)
768 static inline void iommu_put_resv_regions(struct device *dev,
769 struct list_head *list)
773 static inline int iommu_get_group_resv_regions(struct iommu_group *group,
774 struct list_head *head)
779 static inline int iommu_request_dm_for_dev(struct device *dev)
784 static inline int iommu_request_dma_domain_for_dev(struct device *dev)
789 static inline void iommu_set_default_passthrough(bool cmd_line)
793 static inline void iommu_set_default_translated(bool cmd_line)
797 static inline bool iommu_default_passthrough(void)
802 static inline int iommu_attach_group(struct iommu_domain *domain,
803 struct iommu_group *group)
808 static inline void iommu_detach_group(struct iommu_domain *domain,
809 struct iommu_group *group)
813 static inline struct iommu_group *iommu_group_alloc(void)
815 return ERR_PTR(-ENODEV);
818 static inline void *iommu_group_get_iommudata(struct iommu_group *group)
823 static inline void iommu_group_set_iommudata(struct iommu_group *group,
825 void (*release)(void *iommu_data))
829 static inline int iommu_group_set_name(struct iommu_group *group,
835 static inline int iommu_group_add_device(struct iommu_group *group,
841 static inline void iommu_group_remove_device(struct device *dev)
845 static inline int iommu_group_for_each_dev(struct iommu_group *group,
847 int (*fn)(struct device *, void *))
852 static inline struct iommu_group *iommu_group_get(struct device *dev)
857 static inline void iommu_group_put(struct iommu_group *group)
861 static inline int iommu_group_register_notifier(struct iommu_group *group,
862 struct notifier_block *nb)
867 static inline int iommu_group_unregister_notifier(struct iommu_group *group,
868 struct notifier_block *nb)
874 int iommu_register_device_fault_handler(struct device *dev,
875 iommu_dev_fault_handler_t handler,
881 static inline int iommu_unregister_device_fault_handler(struct device *dev)
887 int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
892 static inline int iommu_page_response(struct device *dev,
893 struct iommu_page_response *msg)
898 static inline int iommu_group_id(struct iommu_group *group)
903 static inline int iommu_domain_get_attr(struct iommu_domain *domain,
904 enum iommu_attr attr, void *data)
909 static inline int iommu_domain_set_attr(struct iommu_domain *domain,
910 enum iommu_attr attr, void *data)
915 static inline int iommu_device_register(struct iommu_device *iommu)
920 static inline void iommu_device_set_ops(struct iommu_device *iommu,
921 const struct iommu_ops *ops)
925 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
926 struct fwnode_handle *fwnode)
930 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
935 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
939 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
940 struct iommu_iotlb_gather *gather,
941 unsigned long iova, size_t size)
945 static inline void iommu_device_unregister(struct iommu_device *iommu)
949 static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
950 struct device *parent,
951 const struct attribute_group **groups,
952 const char *fmt, ...)
957 static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
961 static inline int iommu_device_link(struct device *dev, struct device *link)
966 static inline void iommu_device_unlink(struct device *dev, struct device *link)
970 static inline int iommu_fwspec_init(struct device *dev,
971 struct fwnode_handle *iommu_fwnode,
972 const struct iommu_ops *ops)
977 static inline void iommu_fwspec_free(struct device *dev)
981 static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
988 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
994 iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat)
1000 iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
1006 iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
1012 iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
1018 iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev)
1024 iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev)
1029 iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
1034 static inline struct iommu_sva *
1035 iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
1040 static inline void iommu_sva_unbind_device(struct iommu_sva *handle)
1044 static inline int iommu_sva_set_ops(struct iommu_sva *handle,
1045 const struct iommu_sva_ops *ops)
1050 static inline int iommu_sva_get_pasid(struct iommu_sva *handle)
1052 return IOMMU_PASID_INVALID;
1056 iommu_cache_invalidate(struct iommu_domain *domain,
1058 struct iommu_cache_invalidate_info *inv_info)
1062 static inline int iommu_sva_bind_gpasid(struct iommu_domain *domain,
1063 struct device *dev, struct iommu_gpasid_bind_data *data)
1068 static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
1069 struct device *dev, int pasid)
1074 #endif /* CONFIG_IOMMU_API */
1076 #ifdef CONFIG_IOMMU_DEBUGFS
1077 extern struct dentry *iommu_debugfs_dir;
1078 void iommu_debugfs_setup(void);
1080 static inline void iommu_debugfs_setup(void) {}
1083 #endif /* __LINUX_IOMMU_H */