1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
4 * Author: Joerg Roedel <joerg.roedel@amd.com>
7 #ifndef __LINUX_IOMMU_H
8 #define __LINUX_IOMMU_H
10 #include <linux/scatterlist.h>
11 #include <linux/device.h>
12 #include <linux/types.h>
13 #include <linux/errno.h>
14 #include <linux/err.h>
16 #include <linux/ioasid.h>
17 #include <uapi/linux/iommu.h>
19 #define IOMMU_READ (1 << 0)
20 #define IOMMU_WRITE (1 << 1)
21 #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */
22 #define IOMMU_NOEXEC (1 << 3)
23 #define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */
25 * Where the bus hardware includes a privilege level as part of its access type
26 * markings, and certain devices are capable of issuing transactions marked as
27 * either 'supervisor' or 'user', the IOMMU_PRIV flag requests that the other
28 * given permission flags only apply to accesses at the higher privilege level,
29 * and that unprivileged transactions should have as little access as possible.
30 * This would usually imply the same permissions as kernel mappings on the CPU,
31 * if the IOMMU page table format is equivalent.
33 #define IOMMU_PRIV (1 << 5)
40 struct notifier_block;
42 struct iommu_fault_event;
44 /* iommu fault flags */
45 #define IOMMU_FAULT_READ 0x0
46 #define IOMMU_FAULT_WRITE 0x1
48 typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
49 struct device *, unsigned long, int, void *);
50 typedef int (*iommu_dev_fault_handler_t)(struct iommu_fault *, void *);
52 struct iommu_domain_geometry {
53 dma_addr_t aperture_start; /* First address that can be mapped */
54 dma_addr_t aperture_end; /* Last address that can be mapped */
55 bool force_aperture; /* DMA only allowed in mappable range? */
58 /* Domain feature flags */
59 #define __IOMMU_DOMAIN_PAGING (1U << 0) /* Support for iommu_map/unmap */
60 #define __IOMMU_DOMAIN_DMA_API (1U << 1) /* Domain for use in DMA-API
62 #define __IOMMU_DOMAIN_PT (1U << 2) /* Domain is identity mapped */
65 * This are the possible domain-types
67 * IOMMU_DOMAIN_BLOCKED - All DMA is blocked, can be used to isolate
69 * IOMMU_DOMAIN_IDENTITY - DMA addresses are system physical addresses
70 * IOMMU_DOMAIN_UNMANAGED - DMA mappings managed by IOMMU-API user, used
72 * IOMMU_DOMAIN_DMA - Internally used for DMA-API implementations.
73 * This flag allows IOMMU drivers to implement
74 * certain optimizations for these domains
76 #define IOMMU_DOMAIN_BLOCKED (0U)
77 #define IOMMU_DOMAIN_IDENTITY (__IOMMU_DOMAIN_PT)
78 #define IOMMU_DOMAIN_UNMANAGED (__IOMMU_DOMAIN_PAGING)
79 #define IOMMU_DOMAIN_DMA (__IOMMU_DOMAIN_PAGING | \
80 __IOMMU_DOMAIN_DMA_API)
84 const struct iommu_ops *ops;
85 unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */
86 iommu_fault_handler_t handler;
88 struct iommu_domain_geometry geometry;
93 IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA
95 IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */
96 IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */
100 * Following constraints are specifc to FSL_PAMUV1:
101 * -aperture must be power of 2, and naturally aligned
102 * -number of windows must be power of 2, and address space size
103 * of each window is determined by aperture size / # of windows
104 * -the actual size of the mapped region of a window must be power
105 * of 2 starting with 4KB and physical address must be naturally
107 * DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints.
108 * The caller can invoke iommu_domain_get_attr to check if the underlying
109 * iommu implementation supports these constraints.
113 DOMAIN_ATTR_GEOMETRY,
116 DOMAIN_ATTR_FSL_PAMU_STASH,
117 DOMAIN_ATTR_FSL_PAMU_ENABLE,
118 DOMAIN_ATTR_FSL_PAMUV1,
119 DOMAIN_ATTR_NESTING, /* two stages of translation */
120 DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE,
124 /* These are the possible reserved region types */
125 enum iommu_resv_type {
126 /* Memory regions which must be mapped 1:1 at all times */
129 * Memory regions which are advertised to be 1:1 but are
130 * commonly considered relaxable in some conditions,
131 * for instance in device assignment use case (USB, Graphics)
133 IOMMU_RESV_DIRECT_RELAXABLE,
134 /* Arbitrary "never map this or give it to a device" address ranges */
136 /* Hardware MSI region (untranslated) */
138 /* Software-managed MSI translation window */
143 * struct iommu_resv_region - descriptor for a reserved memory region
144 * @list: Linked list pointers
145 * @start: System physical start address of the region
146 * @length: Length of the region in bytes
147 * @prot: IOMMU Protection flags (READ/WRITE/...)
148 * @type: Type of the reserved region
150 struct iommu_resv_region {
151 struct list_head list;
155 enum iommu_resv_type type;
158 /* Per device IOMMU features */
159 enum iommu_dev_features {
160 IOMMU_DEV_FEAT_AUX, /* Aux-domain feature */
161 IOMMU_DEV_FEAT_SVA, /* Shared Virtual Addresses */
164 #define IOMMU_PASID_INVALID (-1U)
166 #ifdef CONFIG_IOMMU_API
169 * struct iommu_iotlb_gather - Range information for a pending IOTLB flush
171 * @start: IOVA representing the start of the range to be flushed
172 * @end: IOVA representing the end of the range to be flushed (exclusive)
173 * @pgsize: The interval at which to perform the flush
175 * This structure is intended to be updated by multiple calls to the
176 * ->unmap() function in struct iommu_ops before eventually being passed
177 * into ->iotlb_sync().
179 struct iommu_iotlb_gather {
186 * struct iommu_ops - iommu ops and capabilities
187 * @capable: check capability
188 * @domain_alloc: allocate iommu domain
189 * @domain_free: free iommu domain
190 * @attach_dev: attach device to an iommu domain
191 * @detach_dev: detach device from an iommu domain
192 * @map: map a physically contiguous memory region to an iommu domain
193 * @unmap: unmap a physically contiguous memory region from an iommu domain
194 * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain
195 * @iotlb_sync_map: Sync mappings created recently using @map to the hardware
196 * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
198 * @iova_to_phys: translate iova to physical address
199 * @probe_device: Add device to iommu driver handling
200 * @release_device: Remove device from iommu driver handling
201 * @probe_finalize: Do final setup work after the device is added to an IOMMU
202 * group and attached to the groups domain
203 * @device_group: find iommu group for a particular device
204 * @domain_get_attr: Query domain attributes
205 * @domain_set_attr: Change domain attributes
206 * @get_resv_regions: Request list of reserved regions for a device
207 * @put_resv_regions: Free list of reserved regions for a device
208 * @apply_resv_region: Temporary helper call-back for iova reserved ranges
209 * @domain_window_enable: Configure and enable a particular window for a domain
210 * @domain_window_disable: Disable a particular window for a domain
211 * @of_xlate: add OF master IDs to iommu grouping
212 * @is_attach_deferred: Check if domain attach should be deferred from iommu
213 * driver init to device driver init (default no)
214 * @dev_has/enable/disable_feat: per device entries to check/enable/disable
215 * iommu specific features.
216 * @dev_feat_enabled: check enabled feature
217 * @aux_attach/detach_dev: aux-domain specific attach/detach entries.
218 * @aux_get_pasid: get the pasid given an aux-domain
219 * @sva_bind: Bind process address space to device
220 * @sva_unbind: Unbind process address space from device
221 * @sva_get_pasid: Get PASID associated to a SVA handle
222 * @page_response: handle page request response
223 * @cache_invalidate: invalidate translation caches
224 * @sva_bind_gpasid: bind guest pasid and mm
225 * @sva_unbind_gpasid: unbind guest pasid and mm
226 * @def_domain_type: device default domain type, return value:
227 * - IOMMU_DOMAIN_IDENTITY: must use an identity domain
228 * - IOMMU_DOMAIN_DMA: must use a dma domain
229 * - 0: use the default setting
230 * @pgsize_bitmap: bitmap of all possible supported page sizes
231 * @owner: Driver module providing these ops
234 bool (*capable)(enum iommu_cap);
236 /* Domain allocation and freeing by the iommu driver */
237 struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);
238 void (*domain_free)(struct iommu_domain *);
240 int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
241 void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
242 int (*map)(struct iommu_domain *domain, unsigned long iova,
243 phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
244 size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
245 size_t size, struct iommu_iotlb_gather *iotlb_gather);
246 void (*flush_iotlb_all)(struct iommu_domain *domain);
247 void (*iotlb_sync_map)(struct iommu_domain *domain);
248 void (*iotlb_sync)(struct iommu_domain *domain,
249 struct iommu_iotlb_gather *iotlb_gather);
250 phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
251 struct iommu_device *(*probe_device)(struct device *dev);
252 void (*release_device)(struct device *dev);
253 void (*probe_finalize)(struct device *dev);
254 struct iommu_group *(*device_group)(struct device *dev);
255 int (*domain_get_attr)(struct iommu_domain *domain,
256 enum iommu_attr attr, void *data);
257 int (*domain_set_attr)(struct iommu_domain *domain,
258 enum iommu_attr attr, void *data);
260 /* Request/Free a list of reserved regions for a device */
261 void (*get_resv_regions)(struct device *dev, struct list_head *list);
262 void (*put_resv_regions)(struct device *dev, struct list_head *list);
263 void (*apply_resv_region)(struct device *dev,
264 struct iommu_domain *domain,
265 struct iommu_resv_region *region);
267 /* Window handling functions */
268 int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
269 phys_addr_t paddr, u64 size, int prot);
270 void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr);
272 int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
273 bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev);
275 /* Per device IOMMU features */
276 bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f);
277 bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f);
278 int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
279 int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
281 /* Aux-domain specific attach/detach entries */
282 int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev);
283 void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev);
284 int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev);
286 struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm,
288 void (*sva_unbind)(struct iommu_sva *handle);
289 int (*sva_get_pasid)(struct iommu_sva *handle);
291 int (*page_response)(struct device *dev,
292 struct iommu_fault_event *evt,
293 struct iommu_page_response *msg);
294 int (*cache_invalidate)(struct iommu_domain *domain, struct device *dev,
295 struct iommu_cache_invalidate_info *inv_info);
296 int (*sva_bind_gpasid)(struct iommu_domain *domain,
297 struct device *dev, struct iommu_gpasid_bind_data *data);
299 int (*sva_unbind_gpasid)(struct device *dev, int pasid);
301 int (*def_domain_type)(struct device *dev);
303 unsigned long pgsize_bitmap;
304 struct module *owner;
308 * struct iommu_device - IOMMU core representation of one IOMMU hardware
310 * @list: Used by the iommu-core to keep a list of registered iommus
311 * @ops: iommu-ops for talking to this iommu
312 * @dev: struct device for sysfs handling
314 struct iommu_device {
315 struct list_head list;
316 const struct iommu_ops *ops;
317 struct fwnode_handle *fwnode;
322 * struct iommu_fault_event - Generic fault event
324 * Can represent recoverable faults such as a page requests or
325 * unrecoverable faults such as DMA or IRQ remapping faults.
327 * @fault: fault descriptor
328 * @list: pending fault event list, used for tracking responses
330 struct iommu_fault_event {
331 struct iommu_fault fault;
332 struct list_head list;
336 * struct iommu_fault_param - per-device IOMMU fault data
337 * @handler: Callback function to handle IOMMU faults at device level
338 * @data: handler private data
339 * @faults: holds the pending faults which needs response
340 * @lock: protect pending faults list
342 struct iommu_fault_param {
343 iommu_dev_fault_handler_t handler;
345 struct list_head faults;
350 * struct dev_iommu - Collection of per-device IOMMU data
352 * @fault_param: IOMMU detected device fault reporting data
353 * @fwspec: IOMMU fwspec data
354 * @iommu_dev: IOMMU device this device is linked to
355 * @priv: IOMMU Driver private data
357 * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
358 * struct iommu_group *iommu_group;
362 struct iommu_fault_param *fault_param;
363 struct iommu_fwspec *fwspec;
364 struct iommu_device *iommu_dev;
368 int iommu_device_register(struct iommu_device *iommu);
369 void iommu_device_unregister(struct iommu_device *iommu);
370 int iommu_device_sysfs_add(struct iommu_device *iommu,
371 struct device *parent,
372 const struct attribute_group **groups,
373 const char *fmt, ...) __printf(4, 5);
374 void iommu_device_sysfs_remove(struct iommu_device *iommu);
375 int iommu_device_link(struct iommu_device *iommu, struct device *link);
376 void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
378 static inline void __iommu_device_set_ops(struct iommu_device *iommu,
379 const struct iommu_ops *ops)
384 #define iommu_device_set_ops(iommu, ops) \
386 struct iommu_ops *__ops = (struct iommu_ops *)(ops); \
387 __ops->owner = THIS_MODULE; \
388 __iommu_device_set_ops(iommu, __ops); \
391 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
392 struct fwnode_handle *fwnode)
394 iommu->fwnode = fwnode;
397 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
399 return (struct iommu_device *)dev_get_drvdata(dev);
402 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
404 *gather = (struct iommu_iotlb_gather) {
409 #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
410 #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
411 #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
412 #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
413 #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
414 #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
416 extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
417 extern int bus_iommu_probe(struct bus_type *bus);
418 extern bool iommu_present(struct bus_type *bus);
419 extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
420 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
421 extern struct iommu_group *iommu_group_get_by_id(int id);
422 extern void iommu_domain_free(struct iommu_domain *domain);
423 extern int iommu_attach_device(struct iommu_domain *domain,
425 extern void iommu_detach_device(struct iommu_domain *domain,
427 extern int iommu_cache_invalidate(struct iommu_domain *domain,
429 struct iommu_cache_invalidate_info *inv_info);
430 extern int iommu_sva_bind_gpasid(struct iommu_domain *domain,
431 struct device *dev, struct iommu_gpasid_bind_data *data);
432 extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
433 struct device *dev, ioasid_t pasid);
434 extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
435 extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
436 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
437 phys_addr_t paddr, size_t size, int prot);
438 extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
439 phys_addr_t paddr, size_t size, int prot);
440 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
442 extern size_t iommu_unmap_fast(struct iommu_domain *domain,
443 unsigned long iova, size_t size,
444 struct iommu_iotlb_gather *iotlb_gather);
445 extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
446 struct scatterlist *sg,unsigned int nents, int prot);
447 extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
448 unsigned long iova, struct scatterlist *sg,
449 unsigned int nents, int prot);
450 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
451 extern void iommu_set_fault_handler(struct iommu_domain *domain,
452 iommu_fault_handler_t handler, void *token);
455 * iommu_map_sgtable - Map the given buffer to the IOMMU domain
456 * @domain: The IOMMU domain to perform the mapping
457 * @iova: The start address to map the buffer
458 * @sgt: The sg_table object describing the buffer
459 * @prot: IOMMU protection bits
461 * Creates a mapping at @iova for the buffer described by a scatterlist
462 * stored in the given sg_table object in the provided IOMMU domain.
464 static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
465 unsigned long iova, struct sg_table *sgt, int prot)
467 return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
470 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
471 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
472 extern void generic_iommu_put_resv_regions(struct device *dev,
473 struct list_head *list);
474 extern void iommu_set_default_passthrough(bool cmd_line);
475 extern void iommu_set_default_translated(bool cmd_line);
476 extern bool iommu_default_passthrough(void);
477 extern struct iommu_resv_region *
478 iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
479 enum iommu_resv_type type);
480 extern int iommu_get_group_resv_regions(struct iommu_group *group,
481 struct list_head *head);
483 extern int iommu_attach_group(struct iommu_domain *domain,
484 struct iommu_group *group);
485 extern void iommu_detach_group(struct iommu_domain *domain,
486 struct iommu_group *group);
487 extern struct iommu_group *iommu_group_alloc(void);
488 extern void *iommu_group_get_iommudata(struct iommu_group *group);
489 extern void iommu_group_set_iommudata(struct iommu_group *group,
491 void (*release)(void *iommu_data));
492 extern int iommu_group_set_name(struct iommu_group *group, const char *name);
493 extern int iommu_group_add_device(struct iommu_group *group,
495 extern void iommu_group_remove_device(struct device *dev);
496 extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
497 int (*fn)(struct device *, void *));
498 extern struct iommu_group *iommu_group_get(struct device *dev);
499 extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
500 extern void iommu_group_put(struct iommu_group *group);
501 extern int iommu_group_register_notifier(struct iommu_group *group,
502 struct notifier_block *nb);
503 extern int iommu_group_unregister_notifier(struct iommu_group *group,
504 struct notifier_block *nb);
505 extern int iommu_register_device_fault_handler(struct device *dev,
506 iommu_dev_fault_handler_t handler,
509 extern int iommu_unregister_device_fault_handler(struct device *dev);
511 extern int iommu_report_device_fault(struct device *dev,
512 struct iommu_fault_event *evt);
513 extern int iommu_page_response(struct device *dev,
514 struct iommu_page_response *msg);
516 extern int iommu_group_id(struct iommu_group *group);
517 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
519 extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
521 extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
524 /* Window handling function prototypes */
525 extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
526 phys_addr_t offset, u64 size,
528 extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
530 extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
531 unsigned long iova, int flags);
533 static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
535 if (domain->ops->flush_iotlb_all)
536 domain->ops->flush_iotlb_all(domain);
539 static inline void iommu_tlb_sync(struct iommu_domain *domain,
540 struct iommu_iotlb_gather *iotlb_gather)
542 if (domain->ops->iotlb_sync)
543 domain->ops->iotlb_sync(domain, iotlb_gather);
545 iommu_iotlb_gather_init(iotlb_gather);
548 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
549 struct iommu_iotlb_gather *gather,
550 unsigned long iova, size_t size)
552 unsigned long start = iova, end = start + size;
555 * If the new page is disjoint from the current range or is mapped at
556 * a different granularity, then sync the TLB so that the gather
557 * structure can be rewritten.
559 if (gather->pgsize != size ||
560 end < gather->start || start > gather->end) {
562 iommu_tlb_sync(domain, gather);
563 gather->pgsize = size;
566 if (gather->end < end)
569 if (gather->start > start)
570 gather->start = start;
573 /* PCI device grouping function */
574 extern struct iommu_group *pci_device_group(struct device *dev);
575 /* Generic device grouping function */
576 extern struct iommu_group *generic_device_group(struct device *dev);
577 /* FSL-MC device grouping function */
578 struct iommu_group *fsl_mc_device_group(struct device *dev);
581 * struct iommu_fwspec - per-device IOMMU instance data
582 * @ops: ops for this device's IOMMU
583 * @iommu_fwnode: firmware handle for this device's IOMMU
584 * @iommu_priv: IOMMU driver private data for this device
585 * @num_pasid_bits: number of PASID bits supported by this device
586 * @num_ids: number of associated device IDs
587 * @ids: IDs which this device may present to the IOMMU
589 struct iommu_fwspec {
590 const struct iommu_ops *ops;
591 struct fwnode_handle *iommu_fwnode;
594 unsigned int num_ids;
598 /* ATS is supported */
599 #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
602 * struct iommu_sva - handle to a device-mm bond
608 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
609 const struct iommu_ops *ops);
610 void iommu_fwspec_free(struct device *dev);
611 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
612 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
614 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
617 return dev->iommu->fwspec;
622 static inline void dev_iommu_fwspec_set(struct device *dev,
623 struct iommu_fwspec *fwspec)
625 dev->iommu->fwspec = fwspec;
628 static inline void *dev_iommu_priv_get(struct device *dev)
630 return dev->iommu->priv;
633 static inline void dev_iommu_priv_set(struct device *dev, void *priv)
635 dev->iommu->priv = priv;
638 int iommu_probe_device(struct device *dev);
639 void iommu_release_device(struct device *dev);
641 bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features f);
642 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
643 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
644 bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
645 int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev);
646 void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev);
647 int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev);
649 struct iommu_sva *iommu_sva_bind_device(struct device *dev,
650 struct mm_struct *mm,
652 void iommu_sva_unbind_device(struct iommu_sva *handle);
653 int iommu_sva_get_pasid(struct iommu_sva *handle);
655 #else /* CONFIG_IOMMU_API */
658 struct iommu_group {};
659 struct iommu_fwspec {};
660 struct iommu_device {};
661 struct iommu_fault_param {};
662 struct iommu_iotlb_gather {};
664 static inline bool iommu_present(struct bus_type *bus)
669 static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
674 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
679 static inline struct iommu_group *iommu_group_get_by_id(int id)
684 static inline void iommu_domain_free(struct iommu_domain *domain)
688 static inline int iommu_attach_device(struct iommu_domain *domain,
694 static inline void iommu_detach_device(struct iommu_domain *domain,
699 static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
704 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
705 phys_addr_t paddr, size_t size, int prot)
710 static inline int iommu_map_atomic(struct iommu_domain *domain,
711 unsigned long iova, phys_addr_t paddr,
712 size_t size, int prot)
717 static inline size_t iommu_unmap(struct iommu_domain *domain,
718 unsigned long iova, size_t size)
723 static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
724 unsigned long iova, int gfp_order,
725 struct iommu_iotlb_gather *iotlb_gather)
730 static inline size_t iommu_map_sg(struct iommu_domain *domain,
731 unsigned long iova, struct scatterlist *sg,
732 unsigned int nents, int prot)
737 static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain,
738 unsigned long iova, struct scatterlist *sg,
739 unsigned int nents, int prot)
744 static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
748 static inline void iommu_tlb_sync(struct iommu_domain *domain,
749 struct iommu_iotlb_gather *iotlb_gather)
753 static inline int iommu_domain_window_enable(struct iommu_domain *domain,
754 u32 wnd_nr, phys_addr_t paddr,
760 static inline void iommu_domain_window_disable(struct iommu_domain *domain,
765 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
770 static inline void iommu_set_fault_handler(struct iommu_domain *domain,
771 iommu_fault_handler_t handler, void *token)
775 static inline void iommu_get_resv_regions(struct device *dev,
776 struct list_head *list)
780 static inline void iommu_put_resv_regions(struct device *dev,
781 struct list_head *list)
785 static inline int iommu_get_group_resv_regions(struct iommu_group *group,
786 struct list_head *head)
791 static inline void iommu_set_default_passthrough(bool cmd_line)
795 static inline void iommu_set_default_translated(bool cmd_line)
799 static inline bool iommu_default_passthrough(void)
804 static inline int iommu_attach_group(struct iommu_domain *domain,
805 struct iommu_group *group)
810 static inline void iommu_detach_group(struct iommu_domain *domain,
811 struct iommu_group *group)
815 static inline struct iommu_group *iommu_group_alloc(void)
817 return ERR_PTR(-ENODEV);
820 static inline void *iommu_group_get_iommudata(struct iommu_group *group)
825 static inline void iommu_group_set_iommudata(struct iommu_group *group,
827 void (*release)(void *iommu_data))
831 static inline int iommu_group_set_name(struct iommu_group *group,
837 static inline int iommu_group_add_device(struct iommu_group *group,
843 static inline void iommu_group_remove_device(struct device *dev)
847 static inline int iommu_group_for_each_dev(struct iommu_group *group,
849 int (*fn)(struct device *, void *))
854 static inline struct iommu_group *iommu_group_get(struct device *dev)
859 static inline void iommu_group_put(struct iommu_group *group)
863 static inline int iommu_group_register_notifier(struct iommu_group *group,
864 struct notifier_block *nb)
869 static inline int iommu_group_unregister_notifier(struct iommu_group *group,
870 struct notifier_block *nb)
876 int iommu_register_device_fault_handler(struct device *dev,
877 iommu_dev_fault_handler_t handler,
883 static inline int iommu_unregister_device_fault_handler(struct device *dev)
889 int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
894 static inline int iommu_page_response(struct device *dev,
895 struct iommu_page_response *msg)
900 static inline int iommu_group_id(struct iommu_group *group)
905 static inline int iommu_domain_get_attr(struct iommu_domain *domain,
906 enum iommu_attr attr, void *data)
911 static inline int iommu_domain_set_attr(struct iommu_domain *domain,
912 enum iommu_attr attr, void *data)
917 static inline int iommu_device_register(struct iommu_device *iommu)
922 static inline void iommu_device_set_ops(struct iommu_device *iommu,
923 const struct iommu_ops *ops)
927 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
928 struct fwnode_handle *fwnode)
932 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
937 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
941 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
942 struct iommu_iotlb_gather *gather,
943 unsigned long iova, size_t size)
947 static inline void iommu_device_unregister(struct iommu_device *iommu)
951 static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
952 struct device *parent,
953 const struct attribute_group **groups,
954 const char *fmt, ...)
959 static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
963 static inline int iommu_device_link(struct device *dev, struct device *link)
968 static inline void iommu_device_unlink(struct device *dev, struct device *link)
972 static inline int iommu_fwspec_init(struct device *dev,
973 struct fwnode_handle *iommu_fwnode,
974 const struct iommu_ops *ops)
979 static inline void iommu_fwspec_free(struct device *dev)
983 static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
990 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
996 iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat)
1002 iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
1008 iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
1014 iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
1020 iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev)
1026 iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev)
1031 iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
1036 static inline struct iommu_sva *
1037 iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
1042 static inline void iommu_sva_unbind_device(struct iommu_sva *handle)
1046 static inline int iommu_sva_get_pasid(struct iommu_sva *handle)
1048 return IOMMU_PASID_INVALID;
1052 iommu_cache_invalidate(struct iommu_domain *domain,
1054 struct iommu_cache_invalidate_info *inv_info)
1058 static inline int iommu_sva_bind_gpasid(struct iommu_domain *domain,
1059 struct device *dev, struct iommu_gpasid_bind_data *data)
1064 static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
1065 struct device *dev, int pasid)
1070 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
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 */