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_dev_fault_handler_t)(struct iommu_fault *, void *);
58 struct iommu_domain_geometry {
59 dma_addr_t aperture_start; /* First address that can be mapped */
60 dma_addr_t aperture_end; /* Last address that can be mapped */
61 bool force_aperture; /* DMA only allowed in mappable range? */
64 /* Domain feature flags */
65 #define __IOMMU_DOMAIN_PAGING (1U << 0) /* Support for iommu_map/unmap */
66 #define __IOMMU_DOMAIN_DMA_API (1U << 1) /* Domain for use in DMA-API
68 #define __IOMMU_DOMAIN_PT (1U << 2) /* Domain is identity mapped */
71 * This are the possible domain-types
73 * IOMMU_DOMAIN_BLOCKED - All DMA is blocked, can be used to isolate
75 * IOMMU_DOMAIN_IDENTITY - DMA addresses are system physical addresses
76 * IOMMU_DOMAIN_UNMANAGED - DMA mappings managed by IOMMU-API user, used
78 * IOMMU_DOMAIN_DMA - Internally used for DMA-API implementations.
79 * This flag allows IOMMU drivers to implement
80 * certain optimizations for these domains
82 #define IOMMU_DOMAIN_BLOCKED (0U)
83 #define IOMMU_DOMAIN_IDENTITY (__IOMMU_DOMAIN_PT)
84 #define IOMMU_DOMAIN_UNMANAGED (__IOMMU_DOMAIN_PAGING)
85 #define IOMMU_DOMAIN_DMA (__IOMMU_DOMAIN_PAGING | \
86 __IOMMU_DOMAIN_DMA_API)
90 const struct iommu_ops *ops;
91 unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */
92 iommu_fault_handler_t handler;
94 struct iommu_domain_geometry geometry;
99 IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA
101 IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */
102 IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */
106 * Following constraints are specifc to FSL_PAMUV1:
107 * -aperture must be power of 2, and naturally aligned
108 * -number of windows must be power of 2, and address space size
109 * of each window is determined by aperture size / # of windows
110 * -the actual size of the mapped region of a window must be power
111 * of 2 starting with 4KB and physical address must be naturally
113 * DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints.
114 * The caller can invoke iommu_domain_get_attr to check if the underlying
115 * iommu implementation supports these constraints.
119 DOMAIN_ATTR_GEOMETRY,
122 DOMAIN_ATTR_FSL_PAMU_STASH,
123 DOMAIN_ATTR_FSL_PAMU_ENABLE,
124 DOMAIN_ATTR_FSL_PAMUV1,
125 DOMAIN_ATTR_NESTING, /* two stages of translation */
126 DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE,
130 /* These are the possible reserved region types */
131 enum iommu_resv_type {
132 /* Memory regions which must be mapped 1:1 at all times */
135 * Memory regions which are advertised to be 1:1 but are
136 * commonly considered relaxable in some conditions,
137 * for instance in device assignment use case (USB, Graphics)
139 IOMMU_RESV_DIRECT_RELAXABLE,
140 /* Arbitrary "never map this or give it to a device" address ranges */
142 /* Hardware MSI region (untranslated) */
144 /* Software-managed MSI translation window */
149 * struct iommu_resv_region - descriptor for a reserved memory region
150 * @list: Linked list pointers
151 * @start: System physical start address of the region
152 * @length: Length of the region in bytes
153 * @prot: IOMMU Protection flags (READ/WRITE/...)
154 * @type: Type of the reserved region
156 struct iommu_resv_region {
157 struct list_head list;
161 enum iommu_resv_type type;
164 /* Per device IOMMU features */
165 enum iommu_dev_features {
166 IOMMU_DEV_FEAT_AUX, /* Aux-domain feature */
167 IOMMU_DEV_FEAT_SVA, /* Shared Virtual Addresses */
170 #define IOMMU_PASID_INVALID (-1U)
172 #ifdef CONFIG_IOMMU_API
175 * struct iommu_iotlb_gather - Range information for a pending IOTLB flush
177 * @start: IOVA representing the start of the range to be flushed
178 * @end: IOVA representing the end of the range to be flushed (exclusive)
179 * @pgsize: The interval at which to perform the flush
181 * This structure is intended to be updated by multiple calls to the
182 * ->unmap() function in struct iommu_ops before eventually being passed
183 * into ->iotlb_sync().
185 struct iommu_iotlb_gather {
192 * struct iommu_ops - iommu ops and capabilities
193 * @capable: check capability
194 * @domain_alloc: allocate iommu domain
195 * @domain_free: free iommu domain
196 * @attach_dev: attach device to an iommu domain
197 * @detach_dev: detach device from an iommu domain
198 * @map: map a physically contiguous memory region to an iommu domain
199 * @unmap: unmap a physically contiguous memory region from an iommu domain
200 * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain
201 * @iotlb_sync_map: Sync mappings created recently using @map to the hardware
202 * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
204 * @iova_to_phys: translate iova to physical address
205 * @probe_device: Add device to iommu driver handling
206 * @release_device: Remove device from iommu driver handling
207 * @probe_finalize: Do final setup work after the device is added to an IOMMU
208 * group and attached to the groups domain
209 * @device_group: find iommu group for a particular device
210 * @domain_get_attr: Query domain attributes
211 * @domain_set_attr: Change domain attributes
212 * @get_resv_regions: Request list of reserved regions for a device
213 * @put_resv_regions: Free list of reserved regions for a device
214 * @apply_resv_region: Temporary helper call-back for iova reserved ranges
215 * @domain_window_enable: Configure and enable a particular window for a domain
216 * @domain_window_disable: Disable a particular window for a domain
217 * @of_xlate: add OF master IDs to iommu grouping
218 * @is_attach_deferred: Check if domain attach should be deferred from iommu
219 * driver init to device driver init (default no)
220 * @dev_has/enable/disable_feat: per device entries to check/enable/disable
221 * iommu specific features.
222 * @dev_feat_enabled: check enabled feature
223 * @aux_attach/detach_dev: aux-domain specific attach/detach entries.
224 * @aux_get_pasid: get the pasid given an aux-domain
225 * @sva_bind: Bind process address space to device
226 * @sva_unbind: Unbind process address space from device
227 * @sva_get_pasid: Get PASID associated to a SVA handle
228 * @page_response: handle page request response
229 * @cache_invalidate: invalidate translation caches
230 * @sva_bind_gpasid: bind guest pasid and mm
231 * @sva_unbind_gpasid: unbind guest pasid and mm
232 * @def_domain_type: device default domain type, return value:
233 * - IOMMU_DOMAIN_IDENTITY: must use an identity domain
234 * - IOMMU_DOMAIN_DMA: must use a dma domain
235 * - 0: use the default setting
236 * @pgsize_bitmap: bitmap of all possible supported page sizes
237 * @owner: Driver module providing these ops
240 bool (*capable)(enum iommu_cap);
242 /* Domain allocation and freeing by the iommu driver */
243 struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);
244 void (*domain_free)(struct iommu_domain *);
246 int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
247 void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
248 int (*map)(struct iommu_domain *domain, unsigned long iova,
249 phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
250 size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
251 size_t size, struct iommu_iotlb_gather *iotlb_gather);
252 void (*flush_iotlb_all)(struct iommu_domain *domain);
253 void (*iotlb_sync_map)(struct iommu_domain *domain);
254 void (*iotlb_sync)(struct iommu_domain *domain,
255 struct iommu_iotlb_gather *iotlb_gather);
256 phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
257 struct iommu_device *(*probe_device)(struct device *dev);
258 void (*release_device)(struct device *dev);
259 void (*probe_finalize)(struct device *dev);
260 struct iommu_group *(*device_group)(struct device *dev);
261 int (*domain_get_attr)(struct iommu_domain *domain,
262 enum iommu_attr attr, void *data);
263 int (*domain_set_attr)(struct iommu_domain *domain,
264 enum iommu_attr attr, void *data);
266 /* Request/Free a list of reserved regions for a device */
267 void (*get_resv_regions)(struct device *dev, struct list_head *list);
268 void (*put_resv_regions)(struct device *dev, struct list_head *list);
269 void (*apply_resv_region)(struct device *dev,
270 struct iommu_domain *domain,
271 struct iommu_resv_region *region);
273 /* Window handling functions */
274 int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
275 phys_addr_t paddr, u64 size, int prot);
276 void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr);
278 int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
279 bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev);
281 /* Per device IOMMU features */
282 bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f);
283 bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f);
284 int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
285 int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
287 /* Aux-domain specific attach/detach entries */
288 int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev);
289 void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev);
290 int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev);
292 struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm,
294 void (*sva_unbind)(struct iommu_sva *handle);
295 int (*sva_get_pasid)(struct iommu_sva *handle);
297 int (*page_response)(struct device *dev,
298 struct iommu_fault_event *evt,
299 struct iommu_page_response *msg);
300 int (*cache_invalidate)(struct iommu_domain *domain, struct device *dev,
301 struct iommu_cache_invalidate_info *inv_info);
302 int (*sva_bind_gpasid)(struct iommu_domain *domain,
303 struct device *dev, struct iommu_gpasid_bind_data *data);
305 int (*sva_unbind_gpasid)(struct device *dev, int pasid);
307 int (*def_domain_type)(struct device *dev);
309 unsigned long pgsize_bitmap;
310 struct module *owner;
314 * struct iommu_device - IOMMU core representation of one IOMMU hardware
316 * @list: Used by the iommu-core to keep a list of registered iommus
317 * @ops: iommu-ops for talking to this iommu
318 * @dev: struct device for sysfs handling
320 struct iommu_device {
321 struct list_head list;
322 const struct iommu_ops *ops;
323 struct fwnode_handle *fwnode;
328 * struct iommu_fault_event - Generic fault event
330 * Can represent recoverable faults such as a page requests or
331 * unrecoverable faults such as DMA or IRQ remapping faults.
333 * @fault: fault descriptor
334 * @list: pending fault event list, used for tracking responses
336 struct iommu_fault_event {
337 struct iommu_fault fault;
338 struct list_head list;
342 * struct iommu_fault_param - per-device IOMMU fault data
343 * @handler: Callback function to handle IOMMU faults at device level
344 * @data: handler private data
345 * @faults: holds the pending faults which needs response
346 * @lock: protect pending faults list
348 struct iommu_fault_param {
349 iommu_dev_fault_handler_t handler;
351 struct list_head faults;
356 * struct dev_iommu - Collection of per-device IOMMU data
358 * @fault_param: IOMMU detected device fault reporting data
359 * @fwspec: IOMMU fwspec data
360 * @iommu_dev: IOMMU device this device is linked to
361 * @priv: IOMMU Driver private data
363 * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
364 * struct iommu_group *iommu_group;
368 struct iommu_fault_param *fault_param;
369 struct iommu_fwspec *fwspec;
370 struct iommu_device *iommu_dev;
374 int iommu_device_register(struct iommu_device *iommu);
375 void iommu_device_unregister(struct iommu_device *iommu);
376 int iommu_device_sysfs_add(struct iommu_device *iommu,
377 struct device *parent,
378 const struct attribute_group **groups,
379 const char *fmt, ...) __printf(4, 5);
380 void iommu_device_sysfs_remove(struct iommu_device *iommu);
381 int iommu_device_link(struct iommu_device *iommu, struct device *link);
382 void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
384 static inline void __iommu_device_set_ops(struct iommu_device *iommu,
385 const struct iommu_ops *ops)
390 #define iommu_device_set_ops(iommu, ops) \
392 struct iommu_ops *__ops = (struct iommu_ops *)(ops); \
393 __ops->owner = THIS_MODULE; \
394 __iommu_device_set_ops(iommu, __ops); \
397 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
398 struct fwnode_handle *fwnode)
400 iommu->fwnode = fwnode;
403 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
405 return (struct iommu_device *)dev_get_drvdata(dev);
408 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
410 *gather = (struct iommu_iotlb_gather) {
415 #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
416 #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
417 #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
418 #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
419 #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
420 #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
422 extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
423 extern int bus_iommu_probe(struct bus_type *bus);
424 extern bool iommu_present(struct bus_type *bus);
425 extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
426 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
427 extern struct iommu_group *iommu_group_get_by_id(int id);
428 extern void iommu_domain_free(struct iommu_domain *domain);
429 extern int iommu_attach_device(struct iommu_domain *domain,
431 extern void iommu_detach_device(struct iommu_domain *domain,
433 extern int iommu_cache_invalidate(struct iommu_domain *domain,
435 struct iommu_cache_invalidate_info *inv_info);
436 extern int iommu_sva_bind_gpasid(struct iommu_domain *domain,
437 struct device *dev, struct iommu_gpasid_bind_data *data);
438 extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
439 struct device *dev, ioasid_t pasid);
440 extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
441 extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
442 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
443 phys_addr_t paddr, size_t size, int prot);
444 extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
445 phys_addr_t paddr, size_t size, int prot);
446 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
448 extern size_t iommu_unmap_fast(struct iommu_domain *domain,
449 unsigned long iova, size_t size,
450 struct iommu_iotlb_gather *iotlb_gather);
451 extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
452 struct scatterlist *sg,unsigned int nents, int prot);
453 extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
454 unsigned long iova, struct scatterlist *sg,
455 unsigned int nents, int prot);
456 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
457 extern void iommu_set_fault_handler(struct iommu_domain *domain,
458 iommu_fault_handler_t handler, void *token);
461 * iommu_map_sgtable - Map the given buffer to the IOMMU domain
462 * @domain: The IOMMU domain to perform the mapping
463 * @iova: The start address to map the buffer
464 * @sgt: The sg_table object describing the buffer
465 * @prot: IOMMU protection bits
467 * Creates a mapping at @iova for the buffer described by a scatterlist
468 * stored in the given sg_table object in the provided IOMMU domain.
470 static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
471 unsigned long iova, struct sg_table *sgt, int prot)
473 return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
476 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
477 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
478 extern void generic_iommu_put_resv_regions(struct device *dev,
479 struct list_head *list);
480 extern void iommu_set_default_passthrough(bool cmd_line);
481 extern void iommu_set_default_translated(bool cmd_line);
482 extern bool iommu_default_passthrough(void);
483 extern struct iommu_resv_region *
484 iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
485 enum iommu_resv_type type);
486 extern int iommu_get_group_resv_regions(struct iommu_group *group,
487 struct list_head *head);
489 extern int iommu_attach_group(struct iommu_domain *domain,
490 struct iommu_group *group);
491 extern void iommu_detach_group(struct iommu_domain *domain,
492 struct iommu_group *group);
493 extern struct iommu_group *iommu_group_alloc(void);
494 extern void *iommu_group_get_iommudata(struct iommu_group *group);
495 extern void iommu_group_set_iommudata(struct iommu_group *group,
497 void (*release)(void *iommu_data));
498 extern int iommu_group_set_name(struct iommu_group *group, const char *name);
499 extern int iommu_group_add_device(struct iommu_group *group,
501 extern void iommu_group_remove_device(struct device *dev);
502 extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
503 int (*fn)(struct device *, void *));
504 extern struct iommu_group *iommu_group_get(struct device *dev);
505 extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
506 extern void iommu_group_put(struct iommu_group *group);
507 extern int iommu_group_register_notifier(struct iommu_group *group,
508 struct notifier_block *nb);
509 extern int iommu_group_unregister_notifier(struct iommu_group *group,
510 struct notifier_block *nb);
511 extern int iommu_register_device_fault_handler(struct device *dev,
512 iommu_dev_fault_handler_t handler,
515 extern int iommu_unregister_device_fault_handler(struct device *dev);
517 extern int iommu_report_device_fault(struct device *dev,
518 struct iommu_fault_event *evt);
519 extern int iommu_page_response(struct device *dev,
520 struct iommu_page_response *msg);
522 extern int iommu_group_id(struct iommu_group *group);
523 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
525 extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
527 extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
530 /* Window handling function prototypes */
531 extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
532 phys_addr_t offset, u64 size,
534 extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
536 extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
537 unsigned long iova, int flags);
539 static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
541 if (domain->ops->flush_iotlb_all)
542 domain->ops->flush_iotlb_all(domain);
545 static inline void iommu_tlb_sync(struct iommu_domain *domain,
546 struct iommu_iotlb_gather *iotlb_gather)
548 if (domain->ops->iotlb_sync)
549 domain->ops->iotlb_sync(domain, iotlb_gather);
551 iommu_iotlb_gather_init(iotlb_gather);
554 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
555 struct iommu_iotlb_gather *gather,
556 unsigned long iova, size_t size)
558 unsigned long start = iova, end = start + size;
561 * If the new page is disjoint from the current range or is mapped at
562 * a different granularity, then sync the TLB so that the gather
563 * structure can be rewritten.
565 if (gather->pgsize != size ||
566 end < gather->start || start > gather->end) {
568 iommu_tlb_sync(domain, gather);
569 gather->pgsize = size;
572 if (gather->end < end)
575 if (gather->start > start)
576 gather->start = start;
579 /* PCI device grouping function */
580 extern struct iommu_group *pci_device_group(struct device *dev);
581 /* Generic device grouping function */
582 extern struct iommu_group *generic_device_group(struct device *dev);
583 /* FSL-MC device grouping function */
584 struct iommu_group *fsl_mc_device_group(struct device *dev);
587 * struct iommu_fwspec - per-device IOMMU instance data
588 * @ops: ops for this device's IOMMU
589 * @iommu_fwnode: firmware handle for this device's IOMMU
590 * @iommu_priv: IOMMU driver private data for this device
591 * @num_pasid_bits: number of PASID bits supported by this device
592 * @num_ids: number of associated device IDs
593 * @ids: IDs which this device may present to the IOMMU
595 struct iommu_fwspec {
596 const struct iommu_ops *ops;
597 struct fwnode_handle *iommu_fwnode;
600 unsigned int num_ids;
604 /* ATS is supported */
605 #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
608 * struct iommu_sva - handle to a device-mm bond
614 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
615 const struct iommu_ops *ops);
616 void iommu_fwspec_free(struct device *dev);
617 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
618 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
620 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
623 return dev->iommu->fwspec;
628 static inline void dev_iommu_fwspec_set(struct device *dev,
629 struct iommu_fwspec *fwspec)
631 dev->iommu->fwspec = fwspec;
634 static inline void *dev_iommu_priv_get(struct device *dev)
636 return dev->iommu->priv;
639 static inline void dev_iommu_priv_set(struct device *dev, void *priv)
641 dev->iommu->priv = priv;
644 int iommu_probe_device(struct device *dev);
645 void iommu_release_device(struct device *dev);
647 bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features f);
648 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
649 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
650 bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
651 int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev);
652 void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev);
653 int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev);
655 struct iommu_sva *iommu_sva_bind_device(struct device *dev,
656 struct mm_struct *mm,
658 void iommu_sva_unbind_device(struct iommu_sva *handle);
659 int iommu_sva_get_pasid(struct iommu_sva *handle);
661 #else /* CONFIG_IOMMU_API */
664 struct iommu_group {};
665 struct iommu_fwspec {};
666 struct iommu_device {};
667 struct iommu_fault_param {};
668 struct iommu_iotlb_gather {};
670 static inline bool iommu_present(struct bus_type *bus)
675 static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
680 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
685 static inline struct iommu_group *iommu_group_get_by_id(int id)
690 static inline void iommu_domain_free(struct iommu_domain *domain)
694 static inline int iommu_attach_device(struct iommu_domain *domain,
700 static inline void iommu_detach_device(struct iommu_domain *domain,
705 static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
710 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
711 phys_addr_t paddr, size_t size, int prot)
716 static inline int iommu_map_atomic(struct iommu_domain *domain,
717 unsigned long iova, phys_addr_t paddr,
718 size_t size, int prot)
723 static inline size_t iommu_unmap(struct iommu_domain *domain,
724 unsigned long iova, size_t size)
729 static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
730 unsigned long iova, int gfp_order,
731 struct iommu_iotlb_gather *iotlb_gather)
736 static inline size_t iommu_map_sg(struct iommu_domain *domain,
737 unsigned long iova, struct scatterlist *sg,
738 unsigned int nents, int prot)
743 static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain,
744 unsigned long iova, struct scatterlist *sg,
745 unsigned int nents, int prot)
750 static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
754 static inline void iommu_tlb_sync(struct iommu_domain *domain,
755 struct iommu_iotlb_gather *iotlb_gather)
759 static inline int iommu_domain_window_enable(struct iommu_domain *domain,
760 u32 wnd_nr, phys_addr_t paddr,
766 static inline void iommu_domain_window_disable(struct iommu_domain *domain,
771 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
776 static inline void iommu_set_fault_handler(struct iommu_domain *domain,
777 iommu_fault_handler_t handler, void *token)
781 static inline void iommu_get_resv_regions(struct device *dev,
782 struct list_head *list)
786 static inline void iommu_put_resv_regions(struct device *dev,
787 struct list_head *list)
791 static inline int iommu_get_group_resv_regions(struct iommu_group *group,
792 struct list_head *head)
797 static inline void iommu_set_default_passthrough(bool cmd_line)
801 static inline void iommu_set_default_translated(bool cmd_line)
805 static inline bool iommu_default_passthrough(void)
810 static inline int iommu_attach_group(struct iommu_domain *domain,
811 struct iommu_group *group)
816 static inline void iommu_detach_group(struct iommu_domain *domain,
817 struct iommu_group *group)
821 static inline struct iommu_group *iommu_group_alloc(void)
823 return ERR_PTR(-ENODEV);
826 static inline void *iommu_group_get_iommudata(struct iommu_group *group)
831 static inline void iommu_group_set_iommudata(struct iommu_group *group,
833 void (*release)(void *iommu_data))
837 static inline int iommu_group_set_name(struct iommu_group *group,
843 static inline int iommu_group_add_device(struct iommu_group *group,
849 static inline void iommu_group_remove_device(struct device *dev)
853 static inline int iommu_group_for_each_dev(struct iommu_group *group,
855 int (*fn)(struct device *, void *))
860 static inline struct iommu_group *iommu_group_get(struct device *dev)
865 static inline void iommu_group_put(struct iommu_group *group)
869 static inline int iommu_group_register_notifier(struct iommu_group *group,
870 struct notifier_block *nb)
875 static inline int iommu_group_unregister_notifier(struct iommu_group *group,
876 struct notifier_block *nb)
882 int iommu_register_device_fault_handler(struct device *dev,
883 iommu_dev_fault_handler_t handler,
889 static inline int iommu_unregister_device_fault_handler(struct device *dev)
895 int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
900 static inline int iommu_page_response(struct device *dev,
901 struct iommu_page_response *msg)
906 static inline int iommu_group_id(struct iommu_group *group)
911 static inline int iommu_domain_get_attr(struct iommu_domain *domain,
912 enum iommu_attr attr, void *data)
917 static inline int iommu_domain_set_attr(struct iommu_domain *domain,
918 enum iommu_attr attr, void *data)
923 static inline int iommu_device_register(struct iommu_device *iommu)
928 static inline void iommu_device_set_ops(struct iommu_device *iommu,
929 const struct iommu_ops *ops)
933 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
934 struct fwnode_handle *fwnode)
938 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
943 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
947 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
948 struct iommu_iotlb_gather *gather,
949 unsigned long iova, size_t size)
953 static inline void iommu_device_unregister(struct iommu_device *iommu)
957 static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
958 struct device *parent,
959 const struct attribute_group **groups,
960 const char *fmt, ...)
965 static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
969 static inline int iommu_device_link(struct device *dev, struct device *link)
974 static inline void iommu_device_unlink(struct device *dev, struct device *link)
978 static inline int iommu_fwspec_init(struct device *dev,
979 struct fwnode_handle *iommu_fwnode,
980 const struct iommu_ops *ops)
985 static inline void iommu_fwspec_free(struct device *dev)
989 static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
996 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
1002 iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat)
1008 iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
1014 iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
1020 iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
1026 iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev)
1032 iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev)
1037 iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
1042 static inline struct iommu_sva *
1043 iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
1048 static inline void iommu_sva_unbind_device(struct iommu_sva *handle)
1052 static inline int iommu_sva_get_pasid(struct iommu_sva *handle)
1054 return IOMMU_PASID_INVALID;
1058 iommu_cache_invalidate(struct iommu_domain *domain,
1060 struct iommu_cache_invalidate_info *inv_info)
1064 static inline int iommu_sva_bind_gpasid(struct iommu_domain *domain,
1065 struct device *dev, struct iommu_gpasid_bind_data *data)
1070 static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
1071 struct device *dev, int pasid)
1076 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
1080 #endif /* CONFIG_IOMMU_API */
1082 #ifdef CONFIG_IOMMU_DEBUGFS
1083 extern struct dentry *iommu_debugfs_dir;
1084 void iommu_debugfs_setup(void);
1086 static inline void iommu_debugfs_setup(void) {}
1089 #endif /* __LINUX_IOMMU_H */