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 <uapi/linux/iommu.h>
18 #define IOMMU_READ (1 << 0)
19 #define IOMMU_WRITE (1 << 1)
20 #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */
21 #define IOMMU_NOEXEC (1 << 3)
22 #define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */
24 * Where the bus hardware includes a privilege level as part of its access type
25 * markings, and certain devices are capable of issuing transactions marked as
26 * either 'supervisor' or 'user', the IOMMU_PRIV flag requests that the other
27 * given permission flags only apply to accesses at the higher privilege level,
28 * and that unprivileged transactions should have as little access as possible.
29 * This would usually imply the same permissions as kernel mappings on the CPU,
30 * if the IOMMU page table format is equivalent.
32 #define IOMMU_PRIV (1 << 5)
34 * Non-coherent masters on few Qualcomm SoCs can use this page protection flag
35 * to set correct cacheability attributes to use an outer level of cache -
36 * last level cache, aka system cache.
38 #define IOMMU_QCOM_SYS_CACHE (1 << 6)
45 struct notifier_block;
47 struct iommu_fault_event;
49 /* iommu fault flags */
50 #define IOMMU_FAULT_READ 0x0
51 #define IOMMU_FAULT_WRITE 0x1
53 typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
54 struct device *, unsigned long, int, void *);
55 typedef int (*iommu_mm_exit_handler_t)(struct device *dev, struct iommu_sva *,
57 typedef int (*iommu_dev_fault_handler_t)(struct iommu_fault *, void *);
59 struct iommu_domain_geometry {
60 dma_addr_t aperture_start; /* First address that can be mapped */
61 dma_addr_t aperture_end; /* Last address that can be mapped */
62 bool force_aperture; /* DMA only allowed in mappable range? */
65 /* Domain feature flags */
66 #define __IOMMU_DOMAIN_PAGING (1U << 0) /* Support for iommu_map/unmap */
67 #define __IOMMU_DOMAIN_DMA_API (1U << 1) /* Domain for use in DMA-API
69 #define __IOMMU_DOMAIN_PT (1U << 2) /* Domain is identity mapped */
72 * This are the possible domain-types
74 * IOMMU_DOMAIN_BLOCKED - All DMA is blocked, can be used to isolate
76 * IOMMU_DOMAIN_IDENTITY - DMA addresses are system physical addresses
77 * IOMMU_DOMAIN_UNMANAGED - DMA mappings managed by IOMMU-API user, used
79 * IOMMU_DOMAIN_DMA - Internally used for DMA-API implementations.
80 * This flag allows IOMMU drivers to implement
81 * certain optimizations for these domains
83 #define IOMMU_DOMAIN_BLOCKED (0U)
84 #define IOMMU_DOMAIN_IDENTITY (__IOMMU_DOMAIN_PT)
85 #define IOMMU_DOMAIN_UNMANAGED (__IOMMU_DOMAIN_PAGING)
86 #define IOMMU_DOMAIN_DMA (__IOMMU_DOMAIN_PAGING | \
87 __IOMMU_DOMAIN_DMA_API)
91 const struct iommu_ops *ops;
92 unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */
93 iommu_fault_handler_t handler;
95 struct iommu_domain_geometry geometry;
100 IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA
102 IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */
103 IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */
107 * Following constraints are specifc to FSL_PAMUV1:
108 * -aperture must be power of 2, and naturally aligned
109 * -number of windows must be power of 2, and address space size
110 * of each window is determined by aperture size / # of windows
111 * -the actual size of the mapped region of a window must be power
112 * of 2 starting with 4KB and physical address must be naturally
114 * DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints.
115 * The caller can invoke iommu_domain_get_attr to check if the underlying
116 * iommu implementation supports these constraints.
120 DOMAIN_ATTR_GEOMETRY,
123 DOMAIN_ATTR_FSL_PAMU_STASH,
124 DOMAIN_ATTR_FSL_PAMU_ENABLE,
125 DOMAIN_ATTR_FSL_PAMUV1,
126 DOMAIN_ATTR_NESTING, /* two stages of translation */
127 DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE,
131 /* These are the possible reserved region types */
132 enum iommu_resv_type {
133 /* Memory regions which must be mapped 1:1 at all times */
136 * Memory regions which are advertised to be 1:1 but are
137 * commonly considered relaxable in some conditions,
138 * for instance in device assignment use case (USB, Graphics)
140 IOMMU_RESV_DIRECT_RELAXABLE,
141 /* Arbitrary "never map this or give it to a device" address ranges */
143 /* Hardware MSI region (untranslated) */
145 /* Software-managed MSI translation window */
150 * struct iommu_resv_region - descriptor for a reserved memory region
151 * @list: Linked list pointers
152 * @start: System physical start address of the region
153 * @length: Length of the region in bytes
154 * @prot: IOMMU Protection flags (READ/WRITE/...)
155 * @type: Type of the reserved region
157 struct iommu_resv_region {
158 struct list_head list;
162 enum iommu_resv_type type;
165 /* Per device IOMMU features */
166 enum iommu_dev_features {
167 IOMMU_DEV_FEAT_AUX, /* Aux-domain feature */
168 IOMMU_DEV_FEAT_SVA, /* Shared Virtual Addresses */
171 #define IOMMU_PASID_INVALID (-1U)
174 * struct iommu_sva_ops - device driver callbacks for an SVA context
176 * @mm_exit: called when the mm is about to be torn down by exit_mmap. After
177 * @mm_exit returns, the device must not issue any more transaction
178 * with the PASID given as argument.
180 * The @mm_exit handler is allowed to sleep. Be careful about the
181 * locks taken in @mm_exit, because they might lead to deadlocks if
182 * they are also held when dropping references to the mm. Consider the
183 * following call chain:
184 * mutex_lock(A); mmput(mm) -> exit_mm() -> @mm_exit() -> mutex_lock(A)
185 * Using mmput_async() prevents this scenario.
188 struct iommu_sva_ops {
189 iommu_mm_exit_handler_t mm_exit;
192 #ifdef CONFIG_IOMMU_API
195 * struct iommu_iotlb_gather - Range information for a pending IOTLB flush
197 * @start: IOVA representing the start of the range to be flushed
198 * @end: IOVA representing the end of the range to be flushed (exclusive)
199 * @pgsize: The interval at which to perform the flush
201 * This structure is intended to be updated by multiple calls to the
202 * ->unmap() function in struct iommu_ops before eventually being passed
203 * into ->iotlb_sync().
205 struct iommu_iotlb_gather {
212 * struct iommu_ops - iommu ops and capabilities
213 * @capable: check capability
214 * @domain_alloc: allocate iommu domain
215 * @domain_free: free iommu domain
216 * @attach_dev: attach device to an iommu domain
217 * @detach_dev: detach device from an iommu domain
218 * @map: map a physically contiguous memory region to an iommu domain
219 * @unmap: unmap a physically contiguous memory region from an iommu domain
220 * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain
221 * @iotlb_sync_map: Sync mappings created recently using @map to the hardware
222 * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
224 * @iova_to_phys: translate iova to physical address
225 * @add_device: add device to iommu grouping
226 * @remove_device: remove device from iommu grouping
227 * @device_group: find iommu group for a particular device
228 * @domain_get_attr: Query domain attributes
229 * @domain_set_attr: Change domain attributes
230 * @get_resv_regions: Request list of reserved regions for a device
231 * @put_resv_regions: Free list of reserved regions for a device
232 * @apply_resv_region: Temporary helper call-back for iova reserved ranges
233 * @domain_window_enable: Configure and enable a particular window for a domain
234 * @domain_window_disable: Disable a particular window for a domain
235 * @of_xlate: add OF master IDs to iommu grouping
236 * @is_attach_deferred: Check if domain attach should be deferred from iommu
237 * driver init to device driver init (default no)
238 * @dev_has/enable/disable_feat: per device entries to check/enable/disable
239 * iommu specific features.
240 * @dev_feat_enabled: check enabled feature
241 * @aux_attach/detach_dev: aux-domain specific attach/detach entries.
242 * @aux_get_pasid: get the pasid given an aux-domain
243 * @sva_bind: Bind process address space to device
244 * @sva_unbind: Unbind process address space from device
245 * @sva_get_pasid: Get PASID associated to a SVA handle
246 * @page_response: handle page request response
247 * @pgsize_bitmap: bitmap of all possible supported page sizes
250 bool (*capable)(enum iommu_cap);
252 /* Domain allocation and freeing by the iommu driver */
253 struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);
254 void (*domain_free)(struct iommu_domain *);
256 int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
257 void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
258 int (*map)(struct iommu_domain *domain, unsigned long iova,
259 phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
260 size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
261 size_t size, struct iommu_iotlb_gather *iotlb_gather);
262 void (*flush_iotlb_all)(struct iommu_domain *domain);
263 void (*iotlb_sync_map)(struct iommu_domain *domain);
264 void (*iotlb_sync)(struct iommu_domain *domain,
265 struct iommu_iotlb_gather *iotlb_gather);
266 phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
267 int (*add_device)(struct device *dev);
268 void (*remove_device)(struct device *dev);
269 struct iommu_group *(*device_group)(struct device *dev);
270 int (*domain_get_attr)(struct iommu_domain *domain,
271 enum iommu_attr attr, void *data);
272 int (*domain_set_attr)(struct iommu_domain *domain,
273 enum iommu_attr attr, void *data);
275 /* Request/Free a list of reserved regions for a device */
276 void (*get_resv_regions)(struct device *dev, struct list_head *list);
277 void (*put_resv_regions)(struct device *dev, struct list_head *list);
278 void (*apply_resv_region)(struct device *dev,
279 struct iommu_domain *domain,
280 struct iommu_resv_region *region);
282 /* Window handling functions */
283 int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
284 phys_addr_t paddr, u64 size, int prot);
285 void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr);
287 int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
288 bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev);
290 /* Per device IOMMU features */
291 bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f);
292 bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f);
293 int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
294 int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
296 /* Aux-domain specific attach/detach entries */
297 int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev);
298 void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev);
299 int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev);
301 struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm,
303 void (*sva_unbind)(struct iommu_sva *handle);
304 int (*sva_get_pasid)(struct iommu_sva *handle);
306 int (*page_response)(struct device *dev,
307 struct iommu_fault_event *evt,
308 struct iommu_page_response *msg);
310 unsigned long pgsize_bitmap;
314 * struct iommu_device - IOMMU core representation of one IOMMU hardware
316 * @list: Used by the iommu-core to keep a list of registered iommus
317 * @ops: iommu-ops for talking to this iommu
318 * @dev: struct device for sysfs handling
320 struct iommu_device {
321 struct list_head list;
322 const struct iommu_ops *ops;
323 struct fwnode_handle *fwnode;
328 * struct iommu_fault_event - Generic fault event
330 * Can represent recoverable faults such as a page requests or
331 * unrecoverable faults such as DMA or IRQ remapping faults.
333 * @fault: fault descriptor
334 * @list: pending fault event list, used for tracking responses
336 struct iommu_fault_event {
337 struct iommu_fault fault;
338 struct list_head list;
342 * struct iommu_fault_param - per-device IOMMU fault data
343 * @handler: Callback function to handle IOMMU faults at device level
344 * @data: handler private data
345 * @faults: holds the pending faults which needs response
346 * @lock: protect pending faults list
348 struct iommu_fault_param {
349 iommu_dev_fault_handler_t handler;
351 struct list_head faults;
356 * struct iommu_param - collection of per-device IOMMU data
358 * @fault_param: IOMMU detected device fault reporting data
360 * TODO: migrate other per device data pointers under iommu_dev_data, e.g.
361 * struct iommu_group *iommu_group;
362 * struct iommu_fwspec *iommu_fwspec;
366 struct iommu_fault_param *fault_param;
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 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
386 struct fwnode_handle *fwnode)
388 iommu->fwnode = fwnode;
391 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
393 return (struct iommu_device *)dev_get_drvdata(dev);
396 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
398 *gather = (struct iommu_iotlb_gather) {
403 #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
404 #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
405 #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
406 #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
407 #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
408 #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
410 extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
411 extern bool iommu_present(struct bus_type *bus);
412 extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
413 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
414 extern struct iommu_group *iommu_group_get_by_id(int id);
415 extern void iommu_domain_free(struct iommu_domain *domain);
416 extern int iommu_attach_device(struct iommu_domain *domain,
418 extern void iommu_detach_device(struct iommu_domain *domain,
420 extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
421 extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
422 extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
423 phys_addr_t paddr, size_t size, int prot);
424 extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
425 phys_addr_t paddr, size_t size, int prot);
426 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
428 extern size_t iommu_unmap_fast(struct iommu_domain *domain,
429 unsigned long iova, size_t size,
430 struct iommu_iotlb_gather *iotlb_gather);
431 extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
432 struct scatterlist *sg,unsigned int nents, int prot);
433 extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
434 unsigned long iova, struct scatterlist *sg,
435 unsigned int nents, int prot);
436 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
437 extern void iommu_set_fault_handler(struct iommu_domain *domain,
438 iommu_fault_handler_t handler, void *token);
440 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
441 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
442 extern int iommu_request_dm_for_dev(struct device *dev);
443 extern int iommu_request_dma_domain_for_dev(struct device *dev);
444 extern void iommu_set_default_passthrough(bool cmd_line);
445 extern void iommu_set_default_translated(bool cmd_line);
446 extern bool iommu_default_passthrough(void);
447 extern struct iommu_resv_region *
448 iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
449 enum iommu_resv_type type);
450 extern int iommu_get_group_resv_regions(struct iommu_group *group,
451 struct list_head *head);
453 extern int iommu_attach_group(struct iommu_domain *domain,
454 struct iommu_group *group);
455 extern void iommu_detach_group(struct iommu_domain *domain,
456 struct iommu_group *group);
457 extern struct iommu_group *iommu_group_alloc(void);
458 extern void *iommu_group_get_iommudata(struct iommu_group *group);
459 extern void iommu_group_set_iommudata(struct iommu_group *group,
461 void (*release)(void *iommu_data));
462 extern int iommu_group_set_name(struct iommu_group *group, const char *name);
463 extern int iommu_group_add_device(struct iommu_group *group,
465 extern void iommu_group_remove_device(struct device *dev);
466 extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
467 int (*fn)(struct device *, void *));
468 extern struct iommu_group *iommu_group_get(struct device *dev);
469 extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
470 extern void iommu_group_put(struct iommu_group *group);
471 extern int iommu_group_register_notifier(struct iommu_group *group,
472 struct notifier_block *nb);
473 extern int iommu_group_unregister_notifier(struct iommu_group *group,
474 struct notifier_block *nb);
475 extern int iommu_register_device_fault_handler(struct device *dev,
476 iommu_dev_fault_handler_t handler,
479 extern int iommu_unregister_device_fault_handler(struct device *dev);
481 extern int iommu_report_device_fault(struct device *dev,
482 struct iommu_fault_event *evt);
483 extern int iommu_page_response(struct device *dev,
484 struct iommu_page_response *msg);
486 extern int iommu_group_id(struct iommu_group *group);
487 extern struct iommu_group *iommu_group_get_for_dev(struct device *dev);
488 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
490 extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
492 extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
495 /* Window handling function prototypes */
496 extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
497 phys_addr_t offset, u64 size,
499 extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
501 extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
502 unsigned long iova, int flags);
504 static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
506 if (domain->ops->flush_iotlb_all)
507 domain->ops->flush_iotlb_all(domain);
510 static inline void iommu_tlb_sync(struct iommu_domain *domain,
511 struct iommu_iotlb_gather *iotlb_gather)
513 if (domain->ops->iotlb_sync)
514 domain->ops->iotlb_sync(domain, iotlb_gather);
516 iommu_iotlb_gather_init(iotlb_gather);
519 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
520 struct iommu_iotlb_gather *gather,
521 unsigned long iova, size_t size)
523 unsigned long start = iova, end = start + size;
526 * If the new page is disjoint from the current range or is mapped at
527 * a different granularity, then sync the TLB so that the gather
528 * structure can be rewritten.
530 if (gather->pgsize != size ||
531 end < gather->start || start > gather->end) {
533 iommu_tlb_sync(domain, gather);
534 gather->pgsize = size;
537 if (gather->end < end)
540 if (gather->start > start)
541 gather->start = start;
544 /* PCI device grouping function */
545 extern struct iommu_group *pci_device_group(struct device *dev);
546 /* Generic device grouping function */
547 extern struct iommu_group *generic_device_group(struct device *dev);
548 /* FSL-MC device grouping function */
549 struct iommu_group *fsl_mc_device_group(struct device *dev);
552 * struct iommu_fwspec - per-device IOMMU instance data
553 * @ops: ops for this device's IOMMU
554 * @iommu_fwnode: firmware handle for this device's IOMMU
555 * @iommu_priv: IOMMU driver private data for this device
556 * @num_ids: number of associated device IDs
557 * @ids: IDs which this device may present to the IOMMU
559 struct iommu_fwspec {
560 const struct iommu_ops *ops;
561 struct fwnode_handle *iommu_fwnode;
564 unsigned int num_ids;
568 /* ATS is supported */
569 #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
572 * struct iommu_sva - handle to a device-mm bond
576 const struct iommu_sva_ops *ops;
579 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
580 const struct iommu_ops *ops);
581 void iommu_fwspec_free(struct device *dev);
582 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
583 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
585 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
587 return dev->iommu_fwspec;
590 static inline void dev_iommu_fwspec_set(struct device *dev,
591 struct iommu_fwspec *fwspec)
593 dev->iommu_fwspec = fwspec;
596 int iommu_probe_device(struct device *dev);
597 void iommu_release_device(struct device *dev);
599 bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features f);
600 int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
601 int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
602 bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
603 int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev);
604 void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev);
605 int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev);
607 struct iommu_sva *iommu_sva_bind_device(struct device *dev,
608 struct mm_struct *mm,
610 void iommu_sva_unbind_device(struct iommu_sva *handle);
611 int iommu_sva_set_ops(struct iommu_sva *handle,
612 const struct iommu_sva_ops *ops);
613 int iommu_sva_get_pasid(struct iommu_sva *handle);
615 #else /* CONFIG_IOMMU_API */
618 struct iommu_group {};
619 struct iommu_fwspec {};
620 struct iommu_device {};
621 struct iommu_fault_param {};
622 struct iommu_iotlb_gather {};
624 static inline bool iommu_present(struct bus_type *bus)
629 static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
634 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
639 static inline struct iommu_group *iommu_group_get_by_id(int id)
644 static inline void iommu_domain_free(struct iommu_domain *domain)
648 static inline int iommu_attach_device(struct iommu_domain *domain,
654 static inline void iommu_detach_device(struct iommu_domain *domain,
659 static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
664 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
665 phys_addr_t paddr, size_t size, int prot)
670 static inline int iommu_map_atomic(struct iommu_domain *domain,
671 unsigned long iova, phys_addr_t paddr,
672 size_t size, int prot)
677 static inline size_t iommu_unmap(struct iommu_domain *domain,
678 unsigned long iova, size_t size)
683 static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
684 unsigned long iova, int gfp_order,
685 struct iommu_iotlb_gather *iotlb_gather)
690 static inline size_t iommu_map_sg(struct iommu_domain *domain,
691 unsigned long iova, struct scatterlist *sg,
692 unsigned int nents, int prot)
697 static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain,
698 unsigned long iova, struct scatterlist *sg,
699 unsigned int nents, int prot)
704 static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
708 static inline void iommu_tlb_sync(struct iommu_domain *domain,
709 struct iommu_iotlb_gather *iotlb_gather)
713 static inline int iommu_domain_window_enable(struct iommu_domain *domain,
714 u32 wnd_nr, phys_addr_t paddr,
720 static inline void iommu_domain_window_disable(struct iommu_domain *domain,
725 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
730 static inline void iommu_set_fault_handler(struct iommu_domain *domain,
731 iommu_fault_handler_t handler, void *token)
735 static inline void iommu_get_resv_regions(struct device *dev,
736 struct list_head *list)
740 static inline void iommu_put_resv_regions(struct device *dev,
741 struct list_head *list)
745 static inline int iommu_get_group_resv_regions(struct iommu_group *group,
746 struct list_head *head)
751 static inline int iommu_request_dm_for_dev(struct device *dev)
756 static inline int iommu_request_dma_domain_for_dev(struct device *dev)
761 static inline void iommu_set_default_passthrough(bool cmd_line)
765 static inline void iommu_set_default_translated(bool cmd_line)
769 static inline bool iommu_default_passthrough(void)
774 static inline int iommu_attach_group(struct iommu_domain *domain,
775 struct iommu_group *group)
780 static inline void iommu_detach_group(struct iommu_domain *domain,
781 struct iommu_group *group)
785 static inline struct iommu_group *iommu_group_alloc(void)
787 return ERR_PTR(-ENODEV);
790 static inline void *iommu_group_get_iommudata(struct iommu_group *group)
795 static inline void iommu_group_set_iommudata(struct iommu_group *group,
797 void (*release)(void *iommu_data))
801 static inline int iommu_group_set_name(struct iommu_group *group,
807 static inline int iommu_group_add_device(struct iommu_group *group,
813 static inline void iommu_group_remove_device(struct device *dev)
817 static inline int iommu_group_for_each_dev(struct iommu_group *group,
819 int (*fn)(struct device *, void *))
824 static inline struct iommu_group *iommu_group_get(struct device *dev)
829 static inline void iommu_group_put(struct iommu_group *group)
833 static inline int iommu_group_register_notifier(struct iommu_group *group,
834 struct notifier_block *nb)
839 static inline int iommu_group_unregister_notifier(struct iommu_group *group,
840 struct notifier_block *nb)
846 int iommu_register_device_fault_handler(struct device *dev,
847 iommu_dev_fault_handler_t handler,
853 static inline int iommu_unregister_device_fault_handler(struct device *dev)
859 int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
864 static inline int iommu_page_response(struct device *dev,
865 struct iommu_page_response *msg)
870 static inline int iommu_group_id(struct iommu_group *group)
875 static inline int iommu_domain_get_attr(struct iommu_domain *domain,
876 enum iommu_attr attr, void *data)
881 static inline int iommu_domain_set_attr(struct iommu_domain *domain,
882 enum iommu_attr attr, void *data)
887 static inline int iommu_device_register(struct iommu_device *iommu)
892 static inline void iommu_device_set_ops(struct iommu_device *iommu,
893 const struct iommu_ops *ops)
897 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
898 struct fwnode_handle *fwnode)
902 static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
907 static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
911 static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
912 struct iommu_iotlb_gather *gather,
913 unsigned long iova, size_t size)
917 static inline void iommu_device_unregister(struct iommu_device *iommu)
921 static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
922 struct device *parent,
923 const struct attribute_group **groups,
924 const char *fmt, ...)
929 static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
933 static inline int iommu_device_link(struct device *dev, struct device *link)
938 static inline void iommu_device_unlink(struct device *dev, struct device *link)
942 static inline int iommu_fwspec_init(struct device *dev,
943 struct fwnode_handle *iommu_fwnode,
944 const struct iommu_ops *ops)
949 static inline void iommu_fwspec_free(struct device *dev)
953 static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
960 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
966 iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat)
972 iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
978 iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
984 iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
990 iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev)
996 iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev)
1001 iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
1006 static inline struct iommu_sva *
1007 iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
1012 static inline void iommu_sva_unbind_device(struct iommu_sva *handle)
1016 static inline int iommu_sva_set_ops(struct iommu_sva *handle,
1017 const struct iommu_sva_ops *ops)
1022 static inline int iommu_sva_get_pasid(struct iommu_sva *handle)
1024 return IOMMU_PASID_INVALID;
1027 #endif /* CONFIG_IOMMU_API */
1029 #ifdef CONFIG_IOMMU_DEBUGFS
1030 extern struct dentry *iommu_debugfs_dir;
1031 void iommu_debugfs_setup(void);
1033 static inline void iommu_debugfs_setup(void) {}
1036 #endif /* __LINUX_IOMMU_H */