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,
121 DOMAIN_ATTR_IO_PGTABLE_CFG,
125 /* These are the possible reserved region types */
126 enum iommu_resv_type {
127 /* Memory regions which must be mapped 1:1 at all times */
130 * Memory regions which are advertised to be 1:1 but are
131 * commonly considered relaxable in some conditions,
132 * for instance in device assignment use case (USB, Graphics)
134 IOMMU_RESV_DIRECT_RELAXABLE,
135 /* Arbitrary "never map this or give it to a device" address ranges */
137 /* Hardware MSI region (untranslated) */
139 /* Software-managed MSI translation window */
144 * struct iommu_resv_region - descriptor for a reserved memory region
145 * @list: Linked list pointers
146 * @start: System physical start address of the region
147 * @length: Length of the region in bytes
148 * @prot: IOMMU Protection flags (READ/WRITE/...)
149 * @type: Type of the reserved region
151 struct iommu_resv_region {
152 struct list_head list;
156 enum iommu_resv_type type;
159 /* Per device IOMMU features */
160 enum iommu_dev_features {
161 IOMMU_DEV_FEAT_AUX, /* Aux-domain feature */
162 IOMMU_DEV_FEAT_SVA, /* Shared Virtual Addresses */
165 #define IOMMU_PASID_INVALID (-1U)
167 #ifdef CONFIG_IOMMU_API
170 * struct iommu_iotlb_gather - Range information for a pending IOTLB flush
172 * @start: IOVA representing the start of the range to be flushed
173 * @end: IOVA representing the end of the range to be flushed (exclusive)
174 * @pgsize: The interval at which to perform the flush
176 * This structure is intended to be updated by multiple calls to the
177 * ->unmap() function in struct iommu_ops before eventually being passed
178 * into ->iotlb_sync().
180 struct iommu_iotlb_gather {
187 * struct iommu_ops - iommu ops and capabilities
188 * @capable: check capability
189 * @domain_alloc: allocate iommu domain
190 * @domain_free: free iommu domain
191 * @attach_dev: attach device to an iommu domain
192 * @detach_dev: detach device from an iommu domain
193 * @map: map a physically contiguous memory region to an iommu domain
194 * @unmap: unmap a physically contiguous memory region from an iommu domain
195 * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain
196 * @iotlb_sync_map: Sync mappings created recently using @map to the hardware
197 * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
199 * @iova_to_phys: translate iova to physical address
200 * @probe_device: Add device to iommu driver handling
201 * @release_device: Remove device from iommu driver handling
202 * @probe_finalize: Do final setup work after the device is added to an IOMMU
203 * group and attached to the groups domain
204 * @device_group: find iommu group for a particular device
205 * @domain_get_attr: Query domain attributes
206 * @domain_set_attr: Change domain attributes
207 * @get_resv_regions: Request list of reserved regions for a device
208 * @put_resv_regions: Free list of reserved regions for a device
209 * @apply_resv_region: Temporary helper call-back for iova reserved ranges
210 * @domain_window_enable: Configure and enable a particular window for a domain
211 * @domain_window_disable: Disable a particular window for a domain
212 * @of_xlate: add OF master IDs to iommu grouping
213 * @is_attach_deferred: Check if domain attach should be deferred from iommu
214 * driver init to device driver init (default no)
215 * @dev_has/enable/disable_feat: per device entries to check/enable/disable
216 * iommu specific features.
217 * @dev_feat_enabled: check enabled feature
218 * @aux_attach/detach_dev: aux-domain specific attach/detach entries.
219 * @aux_get_pasid: get the pasid given an aux-domain
220 * @sva_bind: Bind process address space to device
221 * @sva_unbind: Unbind process address space from device
222 * @sva_get_pasid: Get PASID associated to a SVA handle
223 * @page_response: handle page request response
224 * @cache_invalidate: invalidate translation caches
225 * @sva_bind_gpasid: bind guest pasid and mm
226 * @sva_unbind_gpasid: unbind guest pasid and mm
227 * @def_domain_type: device default domain type, return value:
228 * - IOMMU_DOMAIN_IDENTITY: must use an identity domain
229 * - IOMMU_DOMAIN_DMA: must use a dma domain
230 * - 0: use the default setting
231 * @pgsize_bitmap: bitmap of all possible supported page sizes
232 * @owner: Driver module providing these ops
235 bool (*capable)(enum iommu_cap);
237 /* Domain allocation and freeing by the iommu driver */
238 struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);
239 void (*domain_free)(struct iommu_domain *);
241 int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
242 void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
243 int (*map)(struct iommu_domain *domain, unsigned long iova,
244 phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
245 size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
246 size_t size, struct iommu_iotlb_gather *iotlb_gather);
247 void (*flush_iotlb_all)(struct iommu_domain *domain);
248 void (*iotlb_sync_map)(struct iommu_domain *domain);
249 void (*iotlb_sync)(struct iommu_domain *domain,
250 struct iommu_iotlb_gather *iotlb_gather);
251 phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
252 struct iommu_device *(*probe_device)(struct device *dev);
253 void (*release_device)(struct device *dev);
254 void (*probe_finalize)(struct device *dev);
255 struct iommu_group *(*device_group)(struct device *dev);
256 int (*domain_get_attr)(struct iommu_domain *domain,
257 enum iommu_attr attr, void *data);
258 int (*domain_set_attr)(struct iommu_domain *domain,
259 enum iommu_attr attr, void *data);
261 /* Request/Free a list of reserved regions for a device */
262 void (*get_resv_regions)(struct device *dev, struct list_head *list);
263 void (*put_resv_regions)(struct device *dev, struct list_head *list);
264 void (*apply_resv_region)(struct device *dev,
265 struct iommu_domain *domain,
266 struct iommu_resv_region *region);
268 /* Window handling functions */
269 int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
270 phys_addr_t paddr, u64 size, int prot);
271 void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr);
273 int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
274 bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev);
276 /* Per device IOMMU features */
277 bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f);
278 bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f);
279 int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
280 int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
282 /* Aux-domain specific attach/detach entries */
283 int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev);
284 void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev);
285 int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev);
287 struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm,
289 void (*sva_unbind)(struct iommu_sva *handle);
290 u32 (*sva_get_pasid)(struct iommu_sva *handle);
292 int (*page_response)(struct device *dev,
293 struct iommu_fault_event *evt,
294 struct iommu_page_response *msg);
295 int (*cache_invalidate)(struct iommu_domain *domain, struct device *dev,
296 struct iommu_cache_invalidate_info *inv_info);
297 int (*sva_bind_gpasid)(struct iommu_domain *domain,
298 struct device *dev, struct iommu_gpasid_bind_data *data);
300 int (*sva_unbind_gpasid)(struct device *dev, u32 pasid);
302 int (*def_domain_type)(struct device *dev);
304 unsigned long pgsize_bitmap;
305 struct module *owner;
309 * struct iommu_device - IOMMU core representation of one IOMMU hardware
311 * @list: Used by the iommu-core to keep a list of registered iommus
312 * @ops: iommu-ops for talking to this iommu
313 * @dev: struct device for sysfs handling
315 struct iommu_device {
316 struct list_head list;
317 const struct iommu_ops *ops;
318 struct fwnode_handle *fwnode;
323 * struct iommu_fault_event - Generic fault event
325 * Can represent recoverable faults such as a page requests or
326 * unrecoverable faults such as DMA or IRQ remapping faults.
328 * @fault: fault descriptor
329 * @list: pending fault event list, used for tracking responses
331 struct iommu_fault_event {
332 struct iommu_fault fault;
333 struct list_head list;
337 * struct iommu_fault_param - per-device IOMMU fault data
338 * @handler: Callback function to handle IOMMU faults at device level
339 * @data: handler private data
340 * @faults: holds the pending faults which needs response
341 * @lock: protect pending faults list
343 struct iommu_fault_param {
344 iommu_dev_fault_handler_t handler;
346 struct list_head faults;
351 * struct dev_iommu - Collection of per-device IOMMU data
353 * @fault_param: IOMMU detected device fault reporting data
354 * @fwspec: IOMMU fwspec data
355 * @iommu_dev: IOMMU device this device is linked to
356 * @priv: IOMMU Driver private data
358 * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
359 * struct iommu_group *iommu_group;
363 struct iommu_fault_param *fault_param;
364 struct iommu_fwspec *fwspec;
365 struct iommu_device *iommu_dev;
369 int iommu_device_register(struct iommu_device *iommu);
370 void iommu_device_unregister(struct iommu_device *iommu);
371 int iommu_device_sysfs_add(struct iommu_device *iommu,
372 struct device *parent,
373 const struct attribute_group **groups,
374 const char *fmt, ...) __printf(4, 5);
375 void iommu_device_sysfs_remove(struct iommu_device *iommu);
376 int iommu_device_link(struct iommu_device *iommu, struct device *link);
377 void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
379 static inline void __iommu_device_set_ops(struct iommu_device *iommu,
380 const struct iommu_ops *ops)
385 #define iommu_device_set_ops(iommu, ops) \
387 struct iommu_ops *__ops = (struct iommu_ops *)(ops); \
388 __ops->owner = THIS_MODULE; \
389 __iommu_device_set_ops(iommu, __ops); \
392 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
393 struct fwnode_handle *fwnode)
395 iommu->fwnode = fwnode;
398 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
400 return (struct iommu_device *)dev_get_drvdata(dev);
403 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
405 *gather = (struct iommu_iotlb_gather) {
410 #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
411 #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
412 #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
413 #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
414 #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
415 #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
417 extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
418 extern int bus_iommu_probe(struct bus_type *bus);
419 extern bool iommu_present(struct bus_type *bus);
420 extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
421 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
422 extern struct iommu_group *iommu_group_get_by_id(int id);
423 extern void iommu_domain_free(struct iommu_domain *domain);
424 extern int iommu_attach_device(struct iommu_domain *domain,
426 extern void iommu_detach_device(struct iommu_domain *domain,
428 extern int iommu_uapi_cache_invalidate(struct iommu_domain *domain,
432 extern int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain,
433 struct device *dev, void __user *udata);
434 extern int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
435 struct device *dev, void __user *udata);
436 extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
437 struct device *dev, ioasid_t pasid);
438 extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
439 extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
440 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
441 phys_addr_t paddr, size_t size, int prot);
442 extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
443 phys_addr_t paddr, size_t size, int prot);
444 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
446 extern size_t iommu_unmap_fast(struct iommu_domain *domain,
447 unsigned long iova, size_t size,
448 struct iommu_iotlb_gather *iotlb_gather);
449 extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
450 struct scatterlist *sg,unsigned int nents, int prot);
451 extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
452 unsigned long iova, struct scatterlist *sg,
453 unsigned int nents, int prot);
454 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
455 extern void iommu_set_fault_handler(struct iommu_domain *domain,
456 iommu_fault_handler_t handler, void *token);
458 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
459 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
460 extern void generic_iommu_put_resv_regions(struct device *dev,
461 struct list_head *list);
462 extern void iommu_set_default_passthrough(bool cmd_line);
463 extern void iommu_set_default_translated(bool cmd_line);
464 extern bool iommu_default_passthrough(void);
465 extern struct iommu_resv_region *
466 iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
467 enum iommu_resv_type type);
468 extern int iommu_get_group_resv_regions(struct iommu_group *group,
469 struct list_head *head);
471 extern int iommu_attach_group(struct iommu_domain *domain,
472 struct iommu_group *group);
473 extern void iommu_detach_group(struct iommu_domain *domain,
474 struct iommu_group *group);
475 extern struct iommu_group *iommu_group_alloc(void);
476 extern void *iommu_group_get_iommudata(struct iommu_group *group);
477 extern void iommu_group_set_iommudata(struct iommu_group *group,
479 void (*release)(void *iommu_data));
480 extern int iommu_group_set_name(struct iommu_group *group, const char *name);
481 extern int iommu_group_add_device(struct iommu_group *group,
483 extern void iommu_group_remove_device(struct device *dev);
484 extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
485 int (*fn)(struct device *, void *));
486 extern struct iommu_group *iommu_group_get(struct device *dev);
487 extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
488 extern void iommu_group_put(struct iommu_group *group);
489 extern int iommu_group_register_notifier(struct iommu_group *group,
490 struct notifier_block *nb);
491 extern int iommu_group_unregister_notifier(struct iommu_group *group,
492 struct notifier_block *nb);
493 extern int iommu_register_device_fault_handler(struct device *dev,
494 iommu_dev_fault_handler_t handler,
497 extern int iommu_unregister_device_fault_handler(struct device *dev);
499 extern int iommu_report_device_fault(struct device *dev,
500 struct iommu_fault_event *evt);
501 extern int iommu_page_response(struct device *dev,
502 struct iommu_page_response *msg);
504 extern int iommu_group_id(struct iommu_group *group);
505 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
507 extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
509 extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
512 /* Window handling function prototypes */
513 extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
514 phys_addr_t offset, u64 size,
516 extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
518 extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
519 unsigned long iova, int flags);
521 static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
523 if (domain->ops->flush_iotlb_all)
524 domain->ops->flush_iotlb_all(domain);
527 static inline void iommu_iotlb_sync(struct iommu_domain *domain,
528 struct iommu_iotlb_gather *iotlb_gather)
530 if (domain->ops->iotlb_sync)
531 domain->ops->iotlb_sync(domain, iotlb_gather);
533 iommu_iotlb_gather_init(iotlb_gather);
536 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
537 struct iommu_iotlb_gather *gather,
538 unsigned long iova, size_t size)
540 unsigned long start = iova, end = start + size;
543 * If the new page is disjoint from the current range or is mapped at
544 * a different granularity, then sync the TLB so that the gather
545 * structure can be rewritten.
547 if (gather->pgsize != size ||
548 end < gather->start || start > gather->end) {
550 iommu_iotlb_sync(domain, gather);
551 gather->pgsize = size;
554 if (gather->end < end)
557 if (gather->start > start)
558 gather->start = start;
561 /* PCI device grouping function */
562 extern struct iommu_group *pci_device_group(struct device *dev);
563 /* Generic device grouping function */
564 extern struct iommu_group *generic_device_group(struct device *dev);
565 /* FSL-MC device grouping function */
566 struct iommu_group *fsl_mc_device_group(struct device *dev);
569 * struct iommu_fwspec - per-device IOMMU instance data
570 * @ops: ops for this device's IOMMU
571 * @iommu_fwnode: firmware handle for this device's IOMMU
572 * @iommu_priv: IOMMU driver private data for this device
573 * @num_pasid_bits: number of PASID bits supported by this device
574 * @num_ids: number of associated device IDs
575 * @ids: IDs which this device may present to the IOMMU
577 struct iommu_fwspec {
578 const struct iommu_ops *ops;
579 struct fwnode_handle *iommu_fwnode;
582 unsigned int num_ids;
586 /* ATS is supported */
587 #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
590 * struct iommu_sva - handle to a device-mm bond
596 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
597 const struct iommu_ops *ops);
598 void iommu_fwspec_free(struct device *dev);
599 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
600 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
602 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
605 return dev->iommu->fwspec;
610 static inline void dev_iommu_fwspec_set(struct device *dev,
611 struct iommu_fwspec *fwspec)
613 dev->iommu->fwspec = fwspec;
616 static inline void *dev_iommu_priv_get(struct device *dev)
618 return dev->iommu->priv;
621 static inline void dev_iommu_priv_set(struct device *dev, void *priv)
623 dev->iommu->priv = priv;
626 int iommu_probe_device(struct device *dev);
627 void iommu_release_device(struct device *dev);
629 bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features f);
630 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
631 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
632 bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
633 int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev);
634 void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev);
635 int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev);
637 struct iommu_sva *iommu_sva_bind_device(struct device *dev,
638 struct mm_struct *mm,
640 void iommu_sva_unbind_device(struct iommu_sva *handle);
641 u32 iommu_sva_get_pasid(struct iommu_sva *handle);
643 #else /* CONFIG_IOMMU_API */
646 struct iommu_group {};
647 struct iommu_fwspec {};
648 struct iommu_device {};
649 struct iommu_fault_param {};
650 struct iommu_iotlb_gather {};
652 static inline bool iommu_present(struct bus_type *bus)
657 static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
662 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
667 static inline struct iommu_group *iommu_group_get_by_id(int id)
672 static inline void iommu_domain_free(struct iommu_domain *domain)
676 static inline int iommu_attach_device(struct iommu_domain *domain,
682 static inline void iommu_detach_device(struct iommu_domain *domain,
687 static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
692 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
693 phys_addr_t paddr, size_t size, int prot)
698 static inline int iommu_map_atomic(struct iommu_domain *domain,
699 unsigned long iova, phys_addr_t paddr,
700 size_t size, int prot)
705 static inline size_t iommu_unmap(struct iommu_domain *domain,
706 unsigned long iova, size_t size)
711 static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
712 unsigned long iova, int gfp_order,
713 struct iommu_iotlb_gather *iotlb_gather)
718 static inline size_t iommu_map_sg(struct iommu_domain *domain,
719 unsigned long iova, struct scatterlist *sg,
720 unsigned int nents, int prot)
725 static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain,
726 unsigned long iova, struct scatterlist *sg,
727 unsigned int nents, int prot)
732 static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
736 static inline void iommu_iotlb_sync(struct iommu_domain *domain,
737 struct iommu_iotlb_gather *iotlb_gather)
741 static inline int iommu_domain_window_enable(struct iommu_domain *domain,
742 u32 wnd_nr, phys_addr_t paddr,
748 static inline void iommu_domain_window_disable(struct iommu_domain *domain,
753 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
758 static inline void iommu_set_fault_handler(struct iommu_domain *domain,
759 iommu_fault_handler_t handler, void *token)
763 static inline void iommu_get_resv_regions(struct device *dev,
764 struct list_head *list)
768 static inline void iommu_put_resv_regions(struct device *dev,
769 struct list_head *list)
773 static inline int iommu_get_group_resv_regions(struct iommu_group *group,
774 struct list_head *head)
779 static inline void iommu_set_default_passthrough(bool cmd_line)
783 static inline void iommu_set_default_translated(bool cmd_line)
787 static inline bool iommu_default_passthrough(void)
792 static inline int iommu_attach_group(struct iommu_domain *domain,
793 struct iommu_group *group)
798 static inline void iommu_detach_group(struct iommu_domain *domain,
799 struct iommu_group *group)
803 static inline struct iommu_group *iommu_group_alloc(void)
805 return ERR_PTR(-ENODEV);
808 static inline void *iommu_group_get_iommudata(struct iommu_group *group)
813 static inline void iommu_group_set_iommudata(struct iommu_group *group,
815 void (*release)(void *iommu_data))
819 static inline int iommu_group_set_name(struct iommu_group *group,
825 static inline int iommu_group_add_device(struct iommu_group *group,
831 static inline void iommu_group_remove_device(struct device *dev)
835 static inline int iommu_group_for_each_dev(struct iommu_group *group,
837 int (*fn)(struct device *, void *))
842 static inline struct iommu_group *iommu_group_get(struct device *dev)
847 static inline void iommu_group_put(struct iommu_group *group)
851 static inline int iommu_group_register_notifier(struct iommu_group *group,
852 struct notifier_block *nb)
857 static inline int iommu_group_unregister_notifier(struct iommu_group *group,
858 struct notifier_block *nb)
864 int iommu_register_device_fault_handler(struct device *dev,
865 iommu_dev_fault_handler_t handler,
871 static inline int iommu_unregister_device_fault_handler(struct device *dev)
877 int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
882 static inline int iommu_page_response(struct device *dev,
883 struct iommu_page_response *msg)
888 static inline int iommu_group_id(struct iommu_group *group)
893 static inline int iommu_domain_get_attr(struct iommu_domain *domain,
894 enum iommu_attr attr, void *data)
899 static inline int iommu_domain_set_attr(struct iommu_domain *domain,
900 enum iommu_attr attr, void *data)
905 static inline int iommu_device_register(struct iommu_device *iommu)
910 static inline void iommu_device_set_ops(struct iommu_device *iommu,
911 const struct iommu_ops *ops)
915 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
916 struct fwnode_handle *fwnode)
920 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
925 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
929 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
930 struct iommu_iotlb_gather *gather,
931 unsigned long iova, size_t size)
935 static inline void iommu_device_unregister(struct iommu_device *iommu)
939 static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
940 struct device *parent,
941 const struct attribute_group **groups,
942 const char *fmt, ...)
947 static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
951 static inline int iommu_device_link(struct device *dev, struct device *link)
956 static inline void iommu_device_unlink(struct device *dev, struct device *link)
960 static inline int iommu_fwspec_init(struct device *dev,
961 struct fwnode_handle *iommu_fwnode,
962 const struct iommu_ops *ops)
967 static inline void iommu_fwspec_free(struct device *dev)
971 static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
978 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
984 iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat)
990 iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
996 iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
1002 iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
1008 iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev)
1014 iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev)
1019 iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
1024 static inline struct iommu_sva *
1025 iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
1030 static inline void iommu_sva_unbind_device(struct iommu_sva *handle)
1034 static inline u32 iommu_sva_get_pasid(struct iommu_sva *handle)
1036 return IOMMU_PASID_INVALID;
1040 iommu_uapi_cache_invalidate(struct iommu_domain *domain,
1042 struct iommu_cache_invalidate_info *inv_info)
1047 static inline int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain,
1048 struct device *dev, void __user *udata)
1053 static inline int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
1054 struct device *dev, void __user *udata)
1059 static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
1066 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
1070 #endif /* CONFIG_IOMMU_API */
1073 * iommu_map_sgtable - Map the given buffer to the IOMMU domain
1074 * @domain: The IOMMU domain to perform the mapping
1075 * @iova: The start address to map the buffer
1076 * @sgt: The sg_table object describing the buffer
1077 * @prot: IOMMU protection bits
1079 * Creates a mapping at @iova for the buffer described by a scatterlist
1080 * stored in the given sg_table object in the provided IOMMU domain.
1082 static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
1083 unsigned long iova, struct sg_table *sgt, int prot)
1085 return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
1088 #ifdef CONFIG_IOMMU_DEBUGFS
1089 extern struct dentry *iommu_debugfs_dir;
1090 void iommu_debugfs_setup(void);
1092 static inline void iommu_debugfs_setup(void) {}
1095 #endif /* __LINUX_IOMMU_H */