1 /* 2 * Copyright (C) 2007-2008 Advanced Micro Devices, Inc. 3 * Author: Joerg Roedel <[email protected]> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 as published 7 * by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 */ 18 19 #ifndef __LINUX_IOMMU_H 20 #define __LINUX_IOMMU_H 21 22 #include <linux/scatterlist.h> 23 #include <linux/device.h> 24 #include <linux/types.h> 25 #include <linux/errno.h> 26 #include <linux/err.h> 27 #include <linux/of.h> 28 29 #define IOMMU_READ (1 << 0) 30 #define IOMMU_WRITE (1 << 1) 31 #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */ 32 #define IOMMU_NOEXEC (1 << 3) 33 #define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */ 34 /* 35 * Where the bus hardware includes a privilege level as part of its access type 36 * markings, and certain devices are capable of issuing transactions marked as 37 * either 'supervisor' or 'user', the IOMMU_PRIV flag requests that the other 38 * given permission flags only apply to accesses at the higher privilege level, 39 * and that unprivileged transactions should have as little access as possible. 40 * This would usually imply the same permissions as kernel mappings on the CPU, 41 * if the IOMMU page table format is equivalent. 42 */ 43 #define IOMMU_PRIV (1 << 5) 44 45 struct iommu_ops; 46 struct iommu_group; 47 struct bus_type; 48 struct device; 49 struct iommu_domain; 50 struct notifier_block; 51 52 /* iommu fault flags */ 53 #define IOMMU_FAULT_READ 0x0 54 #define IOMMU_FAULT_WRITE 0x1 55 56 typedef int (*iommu_fault_handler_t)(struct iommu_domain *, 57 struct device *, unsigned long, int, void *); 58 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? */ 63 }; 64 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 68 implementation */ 69 #define __IOMMU_DOMAIN_PT (1U << 2) /* Domain is identity mapped */ 70 71 /* 72 * This are the possible domain-types 73 * 74 * IOMMU_DOMAIN_BLOCKED - All DMA is blocked, can be used to isolate 75 * devices 76 * IOMMU_DOMAIN_IDENTITY - DMA addresses are system physical addresses 77 * IOMMU_DOMAIN_UNMANAGED - DMA mappings managed by IOMMU-API user, used 78 * for VMs 79 * IOMMU_DOMAIN_DMA - Internally used for DMA-API implementations. 80 * This flag allows IOMMU drivers to implement 81 * certain optimizations for these domains 82 */ 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) 88 89 struct iommu_domain { 90 unsigned type; 91 const struct iommu_ops *ops; 92 unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */ 93 iommu_fault_handler_t handler; 94 void *handler_token; 95 struct iommu_domain_geometry geometry; 96 void *iova_cookie; 97 }; 98 99 enum iommu_cap { 100 IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA 101 transactions */ 102 IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */ 103 IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */ 104 }; 105 106 /* 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 113 * aligned. 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. 117 */ 118 119 enum iommu_attr { 120 DOMAIN_ATTR_GEOMETRY, 121 DOMAIN_ATTR_PAGING, 122 DOMAIN_ATTR_WINDOWS, 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, 128 DOMAIN_ATTR_MAX, 129 }; 130 131 /* These are the possible reserved region types */ 132 enum iommu_resv_type { 133 /* Memory regions which must be mapped 1:1 at all times */ 134 IOMMU_RESV_DIRECT, 135 /* Arbitrary "never map this or give it to a device" address ranges */ 136 IOMMU_RESV_RESERVED, 137 /* Hardware MSI region (untranslated) */ 138 IOMMU_RESV_MSI, 139 /* Software-managed MSI translation window */ 140 IOMMU_RESV_SW_MSI, 141 }; 142 143 /** 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 150 */ 151 struct iommu_resv_region { 152 struct list_head list; 153 phys_addr_t start; 154 size_t length; 155 int prot; 156 enum iommu_resv_type type; 157 }; 158 159 #ifdef CONFIG_IOMMU_API 160 161 /** 162 * struct iommu_ops - iommu ops and capabilities 163 * @capable: check capability 164 * @domain_alloc: allocate iommu domain 165 * @domain_free: free iommu domain 166 * @attach_dev: attach device to an iommu domain 167 * @detach_dev: detach device from an iommu domain 168 * @map: map a physically contiguous memory region to an iommu domain 169 * @unmap: unmap a physically contiguous memory region from an iommu domain 170 * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain 171 * @iotlb_range_add: Add a given iova range to the flush queue for this domain 172 * @iotlb_sync_map: Sync mappings created recently using @map to the hardware 173 * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush 174 * queue 175 * @iova_to_phys: translate iova to physical address 176 * @add_device: add device to iommu grouping 177 * @remove_device: remove device from iommu grouping 178 * @device_group: find iommu group for a particular device 179 * @domain_get_attr: Query domain attributes 180 * @domain_set_attr: Change domain attributes 181 * @get_resv_regions: Request list of reserved regions for a device 182 * @put_resv_regions: Free list of reserved regions for a device 183 * @apply_resv_region: Temporary helper call-back for iova reserved ranges 184 * @domain_window_enable: Configure and enable a particular window for a domain 185 * @domain_window_disable: Disable a particular window for a domain 186 * @of_xlate: add OF master IDs to iommu grouping 187 * @is_attach_deferred: Check if domain attach should be deferred from iommu 188 * driver init to device driver init (default no) 189 * @pgsize_bitmap: bitmap of all possible supported page sizes 190 */ 191 struct iommu_ops { 192 bool (*capable)(enum iommu_cap); 193 194 /* Domain allocation and freeing by the iommu driver */ 195 struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type); 196 void (*domain_free)(struct iommu_domain *); 197 198 int (*attach_dev)(struct iommu_domain *domain, struct device *dev); 199 void (*detach_dev)(struct iommu_domain *domain, struct device *dev); 200 int (*map)(struct iommu_domain *domain, unsigned long iova, 201 phys_addr_t paddr, size_t size, int prot); 202 size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, 203 size_t size); 204 void (*flush_iotlb_all)(struct iommu_domain *domain); 205 void (*iotlb_range_add)(struct iommu_domain *domain, 206 unsigned long iova, size_t size); 207 void (*iotlb_sync_map)(struct iommu_domain *domain); 208 void (*iotlb_sync)(struct iommu_domain *domain); 209 phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova); 210 int (*add_device)(struct device *dev); 211 void (*remove_device)(struct device *dev); 212 struct iommu_group *(*device_group)(struct device *dev); 213 int (*domain_get_attr)(struct iommu_domain *domain, 214 enum iommu_attr attr, void *data); 215 int (*domain_set_attr)(struct iommu_domain *domain, 216 enum iommu_attr attr, void *data); 217 218 /* Request/Free a list of reserved regions for a device */ 219 void (*get_resv_regions)(struct device *dev, struct list_head *list); 220 void (*put_resv_regions)(struct device *dev, struct list_head *list); 221 void (*apply_resv_region)(struct device *dev, 222 struct iommu_domain *domain, 223 struct iommu_resv_region *region); 224 225 /* Window handling functions */ 226 int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr, 227 phys_addr_t paddr, u64 size, int prot); 228 void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr); 229 230 int (*of_xlate)(struct device *dev, struct of_phandle_args *args); 231 bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev); 232 233 unsigned long pgsize_bitmap; 234 }; 235 236 /** 237 * struct iommu_device - IOMMU core representation of one IOMMU hardware 238 * instance 239 * @list: Used by the iommu-core to keep a list of registered iommus 240 * @ops: iommu-ops for talking to this iommu 241 * @dev: struct device for sysfs handling 242 */ 243 struct iommu_device { 244 struct list_head list; 245 const struct iommu_ops *ops; 246 struct fwnode_handle *fwnode; 247 struct device *dev; 248 }; 249 250 int iommu_device_register(struct iommu_device *iommu); 251 void iommu_device_unregister(struct iommu_device *iommu); 252 int iommu_device_sysfs_add(struct iommu_device *iommu, 253 struct device *parent, 254 const struct attribute_group **groups, 255 const char *fmt, ...) __printf(4, 5); 256 void iommu_device_sysfs_remove(struct iommu_device *iommu); 257 int iommu_device_link(struct iommu_device *iommu, struct device *link); 258 void iommu_device_unlink(struct iommu_device *iommu, struct device *link); 259 260 static inline void iommu_device_set_ops(struct iommu_device *iommu, 261 const struct iommu_ops *ops) 262 { 263 iommu->ops = ops; 264 } 265 266 static inline void iommu_device_set_fwnode(struct iommu_device *iommu, 267 struct fwnode_handle *fwnode) 268 { 269 iommu->fwnode = fwnode; 270 } 271 272 static inline struct iommu_device *dev_to_iommu_device(struct device *dev) 273 { 274 return (struct iommu_device *)dev_get_drvdata(dev); 275 } 276 277 #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */ 278 #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */ 279 #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */ 280 #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */ 281 #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */ 282 #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */ 283 284 extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops); 285 extern bool iommu_present(struct bus_type *bus); 286 extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap); 287 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus); 288 extern struct iommu_group *iommu_group_get_by_id(int id); 289 extern void iommu_domain_free(struct iommu_domain *domain); 290 extern int iommu_attach_device(struct iommu_domain *domain, 291 struct device *dev); 292 extern void iommu_detach_device(struct iommu_domain *domain, 293 struct device *dev); 294 extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev); 295 extern struct iommu_domain *iommu_get_dma_domain(struct device *dev); 296 extern int iommu_map(struct iommu_domain *domain, unsigned long iova, 297 phys_addr_t paddr, size_t size, int prot); 298 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, 299 size_t size); 300 extern size_t iommu_unmap_fast(struct iommu_domain *domain, 301 unsigned long iova, size_t size); 302 extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, 303 struct scatterlist *sg,unsigned int nents, int prot); 304 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova); 305 extern void iommu_set_fault_handler(struct iommu_domain *domain, 306 iommu_fault_handler_t handler, void *token); 307 308 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); 309 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); 310 extern int iommu_request_dm_for_dev(struct device *dev); 311 extern struct iommu_resv_region * 312 iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, 313 enum iommu_resv_type type); 314 extern int iommu_get_group_resv_regions(struct iommu_group *group, 315 struct list_head *head); 316 317 extern int iommu_attach_group(struct iommu_domain *domain, 318 struct iommu_group *group); 319 extern void iommu_detach_group(struct iommu_domain *domain, 320 struct iommu_group *group); 321 extern struct iommu_group *iommu_group_alloc(void); 322 extern void *iommu_group_get_iommudata(struct iommu_group *group); 323 extern void iommu_group_set_iommudata(struct iommu_group *group, 324 void *iommu_data, 325 void (*release)(void *iommu_data)); 326 extern int iommu_group_set_name(struct iommu_group *group, const char *name); 327 extern int iommu_group_add_device(struct iommu_group *group, 328 struct device *dev); 329 extern void iommu_group_remove_device(struct device *dev); 330 extern int iommu_group_for_each_dev(struct iommu_group *group, void *data, 331 int (*fn)(struct device *, void *)); 332 extern struct iommu_group *iommu_group_get(struct device *dev); 333 extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group); 334 extern void iommu_group_put(struct iommu_group *group); 335 extern int iommu_group_register_notifier(struct iommu_group *group, 336 struct notifier_block *nb); 337 extern int iommu_group_unregister_notifier(struct iommu_group *group, 338 struct notifier_block *nb); 339 extern int iommu_group_id(struct iommu_group *group); 340 extern struct iommu_group *iommu_group_get_for_dev(struct device *dev); 341 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *); 342 343 extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr, 344 void *data); 345 extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr, 346 void *data); 347 348 /* Window handling function prototypes */ 349 extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr, 350 phys_addr_t offset, u64 size, 351 int prot); 352 extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr); 353 354 extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev, 355 unsigned long iova, int flags); 356 357 static inline void iommu_flush_tlb_all(struct iommu_domain *domain) 358 { 359 if (domain->ops->flush_iotlb_all) 360 domain->ops->flush_iotlb_all(domain); 361 } 362 363 static inline void iommu_tlb_range_add(struct iommu_domain *domain, 364 unsigned long iova, size_t size) 365 { 366 if (domain->ops->iotlb_range_add) 367 domain->ops->iotlb_range_add(domain, iova, size); 368 } 369 370 static inline void iommu_tlb_sync(struct iommu_domain *domain) 371 { 372 if (domain->ops->iotlb_sync) 373 domain->ops->iotlb_sync(domain); 374 } 375 376 /* PCI device grouping function */ 377 extern struct iommu_group *pci_device_group(struct device *dev); 378 /* Generic device grouping function */ 379 extern struct iommu_group *generic_device_group(struct device *dev); 380 /* FSL-MC device grouping function */ 381 struct iommu_group *fsl_mc_device_group(struct device *dev); 382 383 /** 384 * struct iommu_fwspec - per-device IOMMU instance data 385 * @ops: ops for this device's IOMMU 386 * @iommu_fwnode: firmware handle for this device's IOMMU 387 * @iommu_priv: IOMMU driver private data for this device 388 * @num_ids: number of associated device IDs 389 * @ids: IDs which this device may present to the IOMMU 390 */ 391 struct iommu_fwspec { 392 const struct iommu_ops *ops; 393 struct fwnode_handle *iommu_fwnode; 394 void *iommu_priv; 395 unsigned int num_ids; 396 u32 ids[1]; 397 }; 398 399 int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode, 400 const struct iommu_ops *ops); 401 void iommu_fwspec_free(struct device *dev); 402 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids); 403 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode); 404 405 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev) 406 { 407 return dev->iommu_fwspec; 408 } 409 410 static inline void dev_iommu_fwspec_set(struct device *dev, 411 struct iommu_fwspec *fwspec) 412 { 413 dev->iommu_fwspec = fwspec; 414 } 415 416 int iommu_probe_device(struct device *dev); 417 void iommu_release_device(struct device *dev); 418 419 #else /* CONFIG_IOMMU_API */ 420 421 struct iommu_ops {}; 422 struct iommu_group {}; 423 struct iommu_fwspec {}; 424 struct iommu_device {}; 425 426 static inline bool iommu_present(struct bus_type *bus) 427 { 428 return false; 429 } 430 431 static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap) 432 { 433 return false; 434 } 435 436 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus) 437 { 438 return NULL; 439 } 440 441 static inline struct iommu_group *iommu_group_get_by_id(int id) 442 { 443 return NULL; 444 } 445 446 static inline void iommu_domain_free(struct iommu_domain *domain) 447 { 448 } 449 450 static inline int iommu_attach_device(struct iommu_domain *domain, 451 struct device *dev) 452 { 453 return -ENODEV; 454 } 455 456 static inline void iommu_detach_device(struct iommu_domain *domain, 457 struct device *dev) 458 { 459 } 460 461 static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev) 462 { 463 return NULL; 464 } 465 466 static inline int iommu_map(struct iommu_domain *domain, unsigned long iova, 467 phys_addr_t paddr, size_t size, int prot) 468 { 469 return -ENODEV; 470 } 471 472 static inline size_t iommu_unmap(struct iommu_domain *domain, 473 unsigned long iova, size_t size) 474 { 475 return 0; 476 } 477 478 static inline size_t iommu_unmap_fast(struct iommu_domain *domain, 479 unsigned long iova, int gfp_order) 480 { 481 return 0; 482 } 483 484 static inline size_t iommu_map_sg(struct iommu_domain *domain, 485 unsigned long iova, struct scatterlist *sg, 486 unsigned int nents, int prot) 487 { 488 return 0; 489 } 490 491 static inline void iommu_flush_tlb_all(struct iommu_domain *domain) 492 { 493 } 494 495 static inline void iommu_tlb_range_add(struct iommu_domain *domain, 496 unsigned long iova, size_t size) 497 { 498 } 499 500 static inline void iommu_tlb_sync(struct iommu_domain *domain) 501 { 502 } 503 504 static inline int iommu_domain_window_enable(struct iommu_domain *domain, 505 u32 wnd_nr, phys_addr_t paddr, 506 u64 size, int prot) 507 { 508 return -ENODEV; 509 } 510 511 static inline void iommu_domain_window_disable(struct iommu_domain *domain, 512 u32 wnd_nr) 513 { 514 } 515 516 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova) 517 { 518 return 0; 519 } 520 521 static inline void iommu_set_fault_handler(struct iommu_domain *domain, 522 iommu_fault_handler_t handler, void *token) 523 { 524 } 525 526 static inline void iommu_get_resv_regions(struct device *dev, 527 struct list_head *list) 528 { 529 } 530 531 static inline void iommu_put_resv_regions(struct device *dev, 532 struct list_head *list) 533 { 534 } 535 536 static inline int iommu_get_group_resv_regions(struct iommu_group *group, 537 struct list_head *head) 538 { 539 return -ENODEV; 540 } 541 542 static inline int iommu_request_dm_for_dev(struct device *dev) 543 { 544 return -ENODEV; 545 } 546 547 static inline int iommu_attach_group(struct iommu_domain *domain, 548 struct iommu_group *group) 549 { 550 return -ENODEV; 551 } 552 553 static inline void iommu_detach_group(struct iommu_domain *domain, 554 struct iommu_group *group) 555 { 556 } 557 558 static inline struct iommu_group *iommu_group_alloc(void) 559 { 560 return ERR_PTR(-ENODEV); 561 } 562 563 static inline void *iommu_group_get_iommudata(struct iommu_group *group) 564 { 565 return NULL; 566 } 567 568 static inline void iommu_group_set_iommudata(struct iommu_group *group, 569 void *iommu_data, 570 void (*release)(void *iommu_data)) 571 { 572 } 573 574 static inline int iommu_group_set_name(struct iommu_group *group, 575 const char *name) 576 { 577 return -ENODEV; 578 } 579 580 static inline int iommu_group_add_device(struct iommu_group *group, 581 struct device *dev) 582 { 583 return -ENODEV; 584 } 585 586 static inline void iommu_group_remove_device(struct device *dev) 587 { 588 } 589 590 static inline int iommu_group_for_each_dev(struct iommu_group *group, 591 void *data, 592 int (*fn)(struct device *, void *)) 593 { 594 return -ENODEV; 595 } 596 597 static inline struct iommu_group *iommu_group_get(struct device *dev) 598 { 599 return NULL; 600 } 601 602 static inline void iommu_group_put(struct iommu_group *group) 603 { 604 } 605 606 static inline int iommu_group_register_notifier(struct iommu_group *group, 607 struct notifier_block *nb) 608 { 609 return -ENODEV; 610 } 611 612 static inline int iommu_group_unregister_notifier(struct iommu_group *group, 613 struct notifier_block *nb) 614 { 615 return 0; 616 } 617 618 static inline int iommu_group_id(struct iommu_group *group) 619 { 620 return -ENODEV; 621 } 622 623 static inline int iommu_domain_get_attr(struct iommu_domain *domain, 624 enum iommu_attr attr, void *data) 625 { 626 return -EINVAL; 627 } 628 629 static inline int iommu_domain_set_attr(struct iommu_domain *domain, 630 enum iommu_attr attr, void *data) 631 { 632 return -EINVAL; 633 } 634 635 static inline int iommu_device_register(struct iommu_device *iommu) 636 { 637 return -ENODEV; 638 } 639 640 static inline void iommu_device_set_ops(struct iommu_device *iommu, 641 const struct iommu_ops *ops) 642 { 643 } 644 645 static inline void iommu_device_set_fwnode(struct iommu_device *iommu, 646 struct fwnode_handle *fwnode) 647 { 648 } 649 650 static inline struct iommu_device *dev_to_iommu_device(struct device *dev) 651 { 652 return NULL; 653 } 654 655 static inline void iommu_device_unregister(struct iommu_device *iommu) 656 { 657 } 658 659 static inline int iommu_device_sysfs_add(struct iommu_device *iommu, 660 struct device *parent, 661 const struct attribute_group **groups, 662 const char *fmt, ...) 663 { 664 return -ENODEV; 665 } 666 667 static inline void iommu_device_sysfs_remove(struct iommu_device *iommu) 668 { 669 } 670 671 static inline int iommu_device_link(struct device *dev, struct device *link) 672 { 673 return -EINVAL; 674 } 675 676 static inline void iommu_device_unlink(struct device *dev, struct device *link) 677 { 678 } 679 680 static inline int iommu_fwspec_init(struct device *dev, 681 struct fwnode_handle *iommu_fwnode, 682 const struct iommu_ops *ops) 683 { 684 return -ENODEV; 685 } 686 687 static inline void iommu_fwspec_free(struct device *dev) 688 { 689 } 690 691 static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids, 692 int num_ids) 693 { 694 return -ENODEV; 695 } 696 697 static inline 698 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode) 699 { 700 return NULL; 701 } 702 703 #endif /* CONFIG_IOMMU_API */ 704 705 #ifdef CONFIG_IOMMU_DEBUGFS 706 extern struct dentry *iommu_debugfs_dir; 707 void iommu_debugfs_setup(void); 708 #else 709 static inline void iommu_debugfs_setup(void) {} 710 #endif 711 712 #endif /* __LINUX_IOMMU_H */ 713