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)
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 u32 (*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, u32 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_uapi_cache_invalidate(struct iommu_domain *domain,
431 extern int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain,
432 struct device *dev, void __user *udata);
433 extern int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
434 struct device *dev, void __user *udata);
435 extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
436 struct device *dev, ioasid_t pasid);
437 extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
438 extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
439 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
440 phys_addr_t paddr, size_t size, int prot);
441 extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
442 phys_addr_t paddr, size_t size, int prot);
443 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
445 extern size_t iommu_unmap_fast(struct iommu_domain *domain,
446 unsigned long iova, size_t size,
447 struct iommu_iotlb_gather *iotlb_gather);
448 extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
449 struct scatterlist *sg,unsigned int nents, int prot);
450 extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
451 unsigned long iova, struct scatterlist *sg,
452 unsigned int nents, int prot);
453 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
454 extern void iommu_set_fault_handler(struct iommu_domain *domain,
455 iommu_fault_handler_t handler, void *token);
457 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
458 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
459 extern void generic_iommu_put_resv_regions(struct device *dev,
460 struct list_head *list);
461 extern void iommu_set_default_passthrough(bool cmd_line);
462 extern void iommu_set_default_translated(bool cmd_line);
463 extern bool iommu_default_passthrough(void);
464 extern struct iommu_resv_region *
465 iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
466 enum iommu_resv_type type);
467 extern int iommu_get_group_resv_regions(struct iommu_group *group,
468 struct list_head *head);
470 extern int iommu_attach_group(struct iommu_domain *domain,
471 struct iommu_group *group);
472 extern void iommu_detach_group(struct iommu_domain *domain,
473 struct iommu_group *group);
474 extern struct iommu_group *iommu_group_alloc(void);
475 extern void *iommu_group_get_iommudata(struct iommu_group *group);
476 extern void iommu_group_set_iommudata(struct iommu_group *group,
478 void (*release)(void *iommu_data));
479 extern int iommu_group_set_name(struct iommu_group *group, const char *name);
480 extern int iommu_group_add_device(struct iommu_group *group,
482 extern void iommu_group_remove_device(struct device *dev);
483 extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
484 int (*fn)(struct device *, void *));
485 extern struct iommu_group *iommu_group_get(struct device *dev);
486 extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
487 extern void iommu_group_put(struct iommu_group *group);
488 extern int iommu_group_register_notifier(struct iommu_group *group,
489 struct notifier_block *nb);
490 extern int iommu_group_unregister_notifier(struct iommu_group *group,
491 struct notifier_block *nb);
492 extern int iommu_register_device_fault_handler(struct device *dev,
493 iommu_dev_fault_handler_t handler,
496 extern int iommu_unregister_device_fault_handler(struct device *dev);
498 extern int iommu_report_device_fault(struct device *dev,
499 struct iommu_fault_event *evt);
500 extern int iommu_page_response(struct device *dev,
501 struct iommu_page_response *msg);
503 extern int iommu_group_id(struct iommu_group *group);
504 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
506 extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
508 extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
511 /* Window handling function prototypes */
512 extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
513 phys_addr_t offset, u64 size,
515 extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
517 extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
518 unsigned long iova, int flags);
520 static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
522 if (domain->ops->flush_iotlb_all)
523 domain->ops->flush_iotlb_all(domain);
526 static inline void iommu_iotlb_sync(struct iommu_domain *domain,
527 struct iommu_iotlb_gather *iotlb_gather)
529 if (domain->ops->iotlb_sync)
530 domain->ops->iotlb_sync(domain, iotlb_gather);
532 iommu_iotlb_gather_init(iotlb_gather);
535 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
536 struct iommu_iotlb_gather *gather,
537 unsigned long iova, size_t size)
539 unsigned long start = iova, end = start + size;
542 * If the new page is disjoint from the current range or is mapped at
543 * a different granularity, then sync the TLB so that the gather
544 * structure can be rewritten.
546 if (gather->pgsize != size ||
547 end < gather->start || start > gather->end) {
549 iommu_iotlb_sync(domain, gather);
550 gather->pgsize = size;
553 if (gather->end < end)
556 if (gather->start > start)
557 gather->start = start;
560 /* PCI device grouping function */
561 extern struct iommu_group *pci_device_group(struct device *dev);
562 /* Generic device grouping function */
563 extern struct iommu_group *generic_device_group(struct device *dev);
564 /* FSL-MC device grouping function */
565 struct iommu_group *fsl_mc_device_group(struct device *dev);
568 * struct iommu_fwspec - per-device IOMMU instance data
569 * @ops: ops for this device's IOMMU
570 * @iommu_fwnode: firmware handle for this device's IOMMU
571 * @iommu_priv: IOMMU driver private data for this device
572 * @num_pasid_bits: number of PASID bits supported by this device
573 * @num_ids: number of associated device IDs
574 * @ids: IDs which this device may present to the IOMMU
576 struct iommu_fwspec {
577 const struct iommu_ops *ops;
578 struct fwnode_handle *iommu_fwnode;
581 unsigned int num_ids;
585 /* ATS is supported */
586 #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
589 * struct iommu_sva - handle to a device-mm bond
595 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
596 const struct iommu_ops *ops);
597 void iommu_fwspec_free(struct device *dev);
598 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
599 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
601 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
604 return dev->iommu->fwspec;
609 static inline void dev_iommu_fwspec_set(struct device *dev,
610 struct iommu_fwspec *fwspec)
612 dev->iommu->fwspec = fwspec;
615 static inline void *dev_iommu_priv_get(struct device *dev)
617 return dev->iommu->priv;
620 static inline void dev_iommu_priv_set(struct device *dev, void *priv)
622 dev->iommu->priv = priv;
625 int iommu_probe_device(struct device *dev);
626 void iommu_release_device(struct device *dev);
628 bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features f);
629 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
630 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
631 bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
632 int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev);
633 void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev);
634 int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev);
636 struct iommu_sva *iommu_sva_bind_device(struct device *dev,
637 struct mm_struct *mm,
639 void iommu_sva_unbind_device(struct iommu_sva *handle);
640 u32 iommu_sva_get_pasid(struct iommu_sva *handle);
642 #else /* CONFIG_IOMMU_API */
645 struct iommu_group {};
646 struct iommu_fwspec {};
647 struct iommu_device {};
648 struct iommu_fault_param {};
649 struct iommu_iotlb_gather {};
651 static inline bool iommu_present(struct bus_type *bus)
656 static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
661 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
666 static inline struct iommu_group *iommu_group_get_by_id(int id)
671 static inline void iommu_domain_free(struct iommu_domain *domain)
675 static inline int iommu_attach_device(struct iommu_domain *domain,
681 static inline void iommu_detach_device(struct iommu_domain *domain,
686 static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
691 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
692 phys_addr_t paddr, size_t size, int prot)
697 static inline int iommu_map_atomic(struct iommu_domain *domain,
698 unsigned long iova, phys_addr_t paddr,
699 size_t size, int prot)
704 static inline size_t iommu_unmap(struct iommu_domain *domain,
705 unsigned long iova, size_t size)
710 static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
711 unsigned long iova, int gfp_order,
712 struct iommu_iotlb_gather *iotlb_gather)
717 static inline size_t iommu_map_sg(struct iommu_domain *domain,
718 unsigned long iova, struct scatterlist *sg,
719 unsigned int nents, int prot)
724 static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain,
725 unsigned long iova, struct scatterlist *sg,
726 unsigned int nents, int prot)
731 static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
735 static inline void iommu_iotlb_sync(struct iommu_domain *domain,
736 struct iommu_iotlb_gather *iotlb_gather)
740 static inline int iommu_domain_window_enable(struct iommu_domain *domain,
741 u32 wnd_nr, phys_addr_t paddr,
747 static inline void iommu_domain_window_disable(struct iommu_domain *domain,
752 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
757 static inline void iommu_set_fault_handler(struct iommu_domain *domain,
758 iommu_fault_handler_t handler, void *token)
762 static inline void iommu_get_resv_regions(struct device *dev,
763 struct list_head *list)
767 static inline void iommu_put_resv_regions(struct device *dev,
768 struct list_head *list)
772 static inline int iommu_get_group_resv_regions(struct iommu_group *group,
773 struct list_head *head)
778 static inline void iommu_set_default_passthrough(bool cmd_line)
782 static inline void iommu_set_default_translated(bool cmd_line)
786 static inline bool iommu_default_passthrough(void)
791 static inline int iommu_attach_group(struct iommu_domain *domain,
792 struct iommu_group *group)
797 static inline void iommu_detach_group(struct iommu_domain *domain,
798 struct iommu_group *group)
802 static inline struct iommu_group *iommu_group_alloc(void)
804 return ERR_PTR(-ENODEV);
807 static inline void *iommu_group_get_iommudata(struct iommu_group *group)
812 static inline void iommu_group_set_iommudata(struct iommu_group *group,
814 void (*release)(void *iommu_data))
818 static inline int iommu_group_set_name(struct iommu_group *group,
824 static inline int iommu_group_add_device(struct iommu_group *group,
830 static inline void iommu_group_remove_device(struct device *dev)
834 static inline int iommu_group_for_each_dev(struct iommu_group *group,
836 int (*fn)(struct device *, void *))
841 static inline struct iommu_group *iommu_group_get(struct device *dev)
846 static inline void iommu_group_put(struct iommu_group *group)
850 static inline int iommu_group_register_notifier(struct iommu_group *group,
851 struct notifier_block *nb)
856 static inline int iommu_group_unregister_notifier(struct iommu_group *group,
857 struct notifier_block *nb)
863 int iommu_register_device_fault_handler(struct device *dev,
864 iommu_dev_fault_handler_t handler,
870 static inline int iommu_unregister_device_fault_handler(struct device *dev)
876 int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
881 static inline int iommu_page_response(struct device *dev,
882 struct iommu_page_response *msg)
887 static inline int iommu_group_id(struct iommu_group *group)
892 static inline int iommu_domain_get_attr(struct iommu_domain *domain,
893 enum iommu_attr attr, void *data)
898 static inline int iommu_domain_set_attr(struct iommu_domain *domain,
899 enum iommu_attr attr, void *data)
904 static inline int iommu_device_register(struct iommu_device *iommu)
909 static inline void iommu_device_set_ops(struct iommu_device *iommu,
910 const struct iommu_ops *ops)
914 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
915 struct fwnode_handle *fwnode)
919 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
924 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
928 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
929 struct iommu_iotlb_gather *gather,
930 unsigned long iova, size_t size)
934 static inline void iommu_device_unregister(struct iommu_device *iommu)
938 static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
939 struct device *parent,
940 const struct attribute_group **groups,
941 const char *fmt, ...)
946 static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
950 static inline int iommu_device_link(struct device *dev, struct device *link)
955 static inline void iommu_device_unlink(struct device *dev, struct device *link)
959 static inline int iommu_fwspec_init(struct device *dev,
960 struct fwnode_handle *iommu_fwnode,
961 const struct iommu_ops *ops)
966 static inline void iommu_fwspec_free(struct device *dev)
970 static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
977 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
983 iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat)
989 iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
995 iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
1001 iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
1007 iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev)
1013 iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev)
1018 iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
1023 static inline struct iommu_sva *
1024 iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
1029 static inline void iommu_sva_unbind_device(struct iommu_sva *handle)
1033 static inline u32 iommu_sva_get_pasid(struct iommu_sva *handle)
1035 return IOMMU_PASID_INVALID;
1039 iommu_uapi_cache_invalidate(struct iommu_domain *domain,
1041 struct iommu_cache_invalidate_info *inv_info)
1046 static inline int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain,
1047 struct device *dev, void __user *udata)
1052 static inline int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
1053 struct device *dev, void __user *udata)
1058 static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
1065 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
1069 #endif /* CONFIG_IOMMU_API */
1072 * iommu_map_sgtable - Map the given buffer to the IOMMU domain
1073 * @domain: The IOMMU domain to perform the mapping
1074 * @iova: The start address to map the buffer
1075 * @sgt: The sg_table object describing the buffer
1076 * @prot: IOMMU protection bits
1078 * Creates a mapping at @iova for the buffer described by a scatterlist
1079 * stored in the given sg_table object in the provided IOMMU domain.
1081 static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
1082 unsigned long iova, struct sg_table *sgt, int prot)
1084 return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
1087 #ifdef CONFIG_IOMMU_DEBUGFS
1088 extern struct dentry *iommu_debugfs_dir;
1089 void iommu_debugfs_setup(void);
1091 static inline void iommu_debugfs_setup(void) {}
1094 #endif /* __LINUX_IOMMU_H */