1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * irq_domain - IRQ translation domains 4 * 5 * Translation infrastructure between hw and linux irq numbers. This is 6 * helpful for interrupt controllers to implement mapping between hardware 7 * irq numbers and the Linux irq number space. 8 * 9 * irq_domains also have hooks for translating device tree or other 10 * firmware interrupt representations into a hardware irq number that 11 * can be mapped back to a Linux irq number without any extra platform 12 * support code. 13 * 14 * Interrupt controller "domain" data structure. This could be defined as a 15 * irq domain controller. That is, it handles the mapping between hardware 16 * and virtual interrupt numbers for a given interrupt domain. The domain 17 * structure is generally created by the PIC code for a given PIC instance 18 * (though a domain can cover more than one PIC if they have a flat number 19 * model). It's the domain callbacks that are responsible for setting the 20 * irq_chip on a given irq_desc after it's been mapped. 21 * 22 * The host code and data structures use a fwnode_handle pointer to 23 * identify the domain. In some cases, and in order to preserve source 24 * code compatibility, this fwnode pointer is "upgraded" to a DT 25 * device_node. For those firmware infrastructures that do not provide 26 * a unique identifier for an interrupt controller, the irq_domain 27 * code offers a fwnode allocator. 28 */ 29 30 #ifndef _LINUX_IRQDOMAIN_H 31 #define _LINUX_IRQDOMAIN_H 32 33 #include <linux/types.h> 34 #include <linux/irqdomain_defs.h> 35 #include <linux/irqhandler.h> 36 #include <linux/of.h> 37 #include <linux/mutex.h> 38 #include <linux/radix-tree.h> 39 40 struct device_node; 41 struct fwnode_handle; 42 struct irq_domain; 43 struct irq_chip; 44 struct irq_data; 45 struct irq_desc; 46 struct cpumask; 47 struct seq_file; 48 struct irq_affinity_desc; 49 struct msi_parent_ops; 50 51 #define IRQ_DOMAIN_IRQ_SPEC_PARAMS 16 52 53 /** 54 * struct irq_fwspec - generic IRQ specifier structure 55 * 56 * @fwnode: Pointer to a firmware-specific descriptor 57 * @param_count: Number of device-specific parameters 58 * @param: Device-specific parameters 59 * 60 * This structure, directly modeled after of_phandle_args, is used to 61 * pass a device-specific description of an interrupt. 62 */ 63 struct irq_fwspec { 64 struct fwnode_handle *fwnode; 65 int param_count; 66 u32 param[IRQ_DOMAIN_IRQ_SPEC_PARAMS]; 67 }; 68 69 /* Conversion function from of_phandle_args fields to fwspec */ 70 void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args, 71 unsigned int count, struct irq_fwspec *fwspec); 72 73 /** 74 * struct irq_domain_ops - Methods for irq_domain objects 75 * @match: Match an interrupt controller device node to a host, returns 76 * 1 on a match 77 * @map: Create or update a mapping between a virtual irq number and a hw 78 * irq number. This is called only once for a given mapping. 79 * @unmap: Dispose of such a mapping 80 * @xlate: Given a device tree node and interrupt specifier, decode 81 * the hardware irq number and linux irq type value. 82 * 83 * Functions below are provided by the driver and called whenever a new mapping 84 * is created or an old mapping is disposed. The driver can then proceed to 85 * whatever internal data structures management is required. It also needs 86 * to setup the irq_desc when returning from map(). 87 */ 88 struct irq_domain_ops { 89 int (*match)(struct irq_domain *d, struct device_node *node, 90 enum irq_domain_bus_token bus_token); 91 int (*select)(struct irq_domain *d, struct irq_fwspec *fwspec, 92 enum irq_domain_bus_token bus_token); 93 int (*map)(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw); 94 void (*unmap)(struct irq_domain *d, unsigned int virq); 95 int (*xlate)(struct irq_domain *d, struct device_node *node, 96 const u32 *intspec, unsigned int intsize, 97 unsigned long *out_hwirq, unsigned int *out_type); 98 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 99 /* extended V2 interfaces to support hierarchy irq_domains */ 100 int (*alloc)(struct irq_domain *d, unsigned int virq, 101 unsigned int nr_irqs, void *arg); 102 void (*free)(struct irq_domain *d, unsigned int virq, 103 unsigned int nr_irqs); 104 int (*activate)(struct irq_domain *d, struct irq_data *irqd, bool reserve); 105 void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data); 106 int (*translate)(struct irq_domain *d, struct irq_fwspec *fwspec, 107 unsigned long *out_hwirq, unsigned int *out_type); 108 #endif 109 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS 110 void (*debug_show)(struct seq_file *m, struct irq_domain *d, 111 struct irq_data *irqd, int ind); 112 #endif 113 }; 114 115 extern const struct irq_domain_ops irq_generic_chip_ops; 116 117 struct irq_domain_chip_generic; 118 119 /** 120 * struct irq_domain - Hardware interrupt number translation object 121 * @link: Element in global irq_domain list. 122 * @name: Name of interrupt domain 123 * @ops: Pointer to irq_domain methods 124 * @host_data: Private data pointer for use by owner. Not touched by irq_domain 125 * core code. 126 * @flags: Per irq_domain flags 127 * @mapcount: The number of mapped interrupts 128 * @mutex: Domain lock, hierarchical domains use root domain's lock 129 * @root: Pointer to root domain, or containing structure if non-hierarchical 130 * 131 * Optional elements: 132 * @fwnode: Pointer to firmware node associated with the irq_domain. Pretty easy 133 * to swap it for the of_node via the irq_domain_get_of_node accessor 134 * @gc: Pointer to a list of generic chips. There is a helper function for 135 * setting up one or more generic chips for interrupt controllers 136 * drivers using the generic chip library which uses this pointer. 137 * @dev: Pointer to the device which instantiated the irqdomain 138 * With per device irq domains this is not necessarily the same 139 * as @pm_dev. 140 * @pm_dev: Pointer to a device that can be utilized for power management 141 * purposes related to the irq domain. 142 * @parent: Pointer to parent irq_domain to support hierarchy irq_domains 143 * @msi_parent_ops: Pointer to MSI parent domain methods for per device domain init 144 * 145 * Revmap data, used internally by the irq domain code: 146 * @revmap_size: Size of the linear map table @revmap[] 147 * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map 148 * @revmap: Linear table of irq_data pointers 149 */ 150 struct irq_domain { 151 struct list_head link; 152 const char *name; 153 const struct irq_domain_ops *ops; 154 void *host_data; 155 unsigned int flags; 156 unsigned int mapcount; 157 struct mutex mutex; 158 struct irq_domain *root; 159 160 /* Optional data */ 161 struct fwnode_handle *fwnode; 162 enum irq_domain_bus_token bus_token; 163 struct irq_domain_chip_generic *gc; 164 struct device *dev; 165 struct device *pm_dev; 166 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 167 struct irq_domain *parent; 168 #endif 169 #ifdef CONFIG_GENERIC_MSI_IRQ 170 const struct msi_parent_ops *msi_parent_ops; 171 #endif 172 173 /* reverse map data. The linear map gets appended to the irq_domain */ 174 irq_hw_number_t hwirq_max; 175 unsigned int revmap_size; 176 struct radix_tree_root revmap_tree; 177 struct irq_data __rcu *revmap[]; 178 }; 179 180 /* Irq domain flags */ 181 enum { 182 /* Irq domain is hierarchical */ 183 IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0), 184 185 /* Irq domain name was allocated in __irq_domain_add() */ 186 IRQ_DOMAIN_NAME_ALLOCATED = (1 << 1), 187 188 /* Irq domain is an IPI domain with virq per cpu */ 189 IRQ_DOMAIN_FLAG_IPI_PER_CPU = (1 << 2), 190 191 /* Irq domain is an IPI domain with single virq */ 192 IRQ_DOMAIN_FLAG_IPI_SINGLE = (1 << 3), 193 194 /* Irq domain implements MSIs */ 195 IRQ_DOMAIN_FLAG_MSI = (1 << 4), 196 197 /* 198 * Irq domain implements isolated MSI, see msi_device_has_isolated_msi() 199 */ 200 IRQ_DOMAIN_FLAG_ISOLATED_MSI = (1 << 5), 201 202 /* Irq domain doesn't translate anything */ 203 IRQ_DOMAIN_FLAG_NO_MAP = (1 << 6), 204 205 /* Irq domain is a MSI parent domain */ 206 IRQ_DOMAIN_FLAG_MSI_PARENT = (1 << 8), 207 208 /* Irq domain is a MSI device domain */ 209 IRQ_DOMAIN_FLAG_MSI_DEVICE = (1 << 9), 210 211 /* 212 * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved 213 * for implementation specific purposes and ignored by the 214 * core code. 215 */ 216 IRQ_DOMAIN_FLAG_NONCORE = (1 << 16), 217 }; 218 219 static inline struct device_node *irq_domain_get_of_node(struct irq_domain *d) 220 { 221 return to_of_node(d->fwnode); 222 } 223 224 static inline void irq_domain_set_pm_device(struct irq_domain *d, 225 struct device *dev) 226 { 227 if (d) 228 d->pm_dev = dev; 229 } 230 231 #ifdef CONFIG_IRQ_DOMAIN 232 struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id, 233 const char *name, phys_addr_t *pa); 234 235 enum { 236 IRQCHIP_FWNODE_REAL, 237 IRQCHIP_FWNODE_NAMED, 238 IRQCHIP_FWNODE_NAMED_ID, 239 }; 240 241 static inline 242 struct fwnode_handle *irq_domain_alloc_named_fwnode(const char *name) 243 { 244 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED, 0, name, NULL); 245 } 246 247 static inline 248 struct fwnode_handle *irq_domain_alloc_named_id_fwnode(const char *name, int id) 249 { 250 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED_ID, id, name, 251 NULL); 252 } 253 254 static inline struct fwnode_handle *irq_domain_alloc_fwnode(phys_addr_t *pa) 255 { 256 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_REAL, 0, NULL, pa); 257 } 258 259 void irq_domain_free_fwnode(struct fwnode_handle *fwnode); 260 struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, unsigned int size, 261 irq_hw_number_t hwirq_max, int direct_max, 262 const struct irq_domain_ops *ops, 263 void *host_data); 264 struct irq_domain *irq_domain_create_simple(struct fwnode_handle *fwnode, 265 unsigned int size, 266 unsigned int first_irq, 267 const struct irq_domain_ops *ops, 268 void *host_data); 269 struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, 270 unsigned int size, 271 unsigned int first_irq, 272 irq_hw_number_t first_hwirq, 273 const struct irq_domain_ops *ops, 274 void *host_data); 275 struct irq_domain *irq_domain_create_legacy(struct fwnode_handle *fwnode, 276 unsigned int size, 277 unsigned int first_irq, 278 irq_hw_number_t first_hwirq, 279 const struct irq_domain_ops *ops, 280 void *host_data); 281 extern struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec, 282 enum irq_domain_bus_token bus_token); 283 extern void irq_set_default_host(struct irq_domain *host); 284 extern struct irq_domain *irq_get_default_host(void); 285 extern int irq_domain_alloc_descs(int virq, unsigned int nr_irqs, 286 irq_hw_number_t hwirq, int node, 287 const struct irq_affinity_desc *affinity); 288 289 static inline struct fwnode_handle *of_node_to_fwnode(struct device_node *node) 290 { 291 return node ? &node->fwnode : NULL; 292 } 293 294 extern const struct fwnode_operations irqchip_fwnode_ops; 295 296 static inline bool is_fwnode_irqchip(struct fwnode_handle *fwnode) 297 { 298 return fwnode && fwnode->ops == &irqchip_fwnode_ops; 299 } 300 301 extern void irq_domain_update_bus_token(struct irq_domain *domain, 302 enum irq_domain_bus_token bus_token); 303 304 static inline 305 struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, 306 enum irq_domain_bus_token bus_token) 307 { 308 struct irq_fwspec fwspec = { 309 .fwnode = fwnode, 310 }; 311 312 return irq_find_matching_fwspec(&fwspec, bus_token); 313 } 314 315 static inline struct irq_domain *irq_find_matching_host(struct device_node *node, 316 enum irq_domain_bus_token bus_token) 317 { 318 return irq_find_matching_fwnode(of_node_to_fwnode(node), bus_token); 319 } 320 321 static inline struct irq_domain *irq_find_host(struct device_node *node) 322 { 323 struct irq_domain *d; 324 325 d = irq_find_matching_host(node, DOMAIN_BUS_WIRED); 326 if (!d) 327 d = irq_find_matching_host(node, DOMAIN_BUS_ANY); 328 329 return d; 330 } 331 332 static inline struct irq_domain *irq_domain_add_simple(struct device_node *of_node, 333 unsigned int size, 334 unsigned int first_irq, 335 const struct irq_domain_ops *ops, 336 void *host_data) 337 { 338 return irq_domain_create_simple(of_node_to_fwnode(of_node), size, first_irq, ops, host_data); 339 } 340 341 /** 342 * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain. 343 * @of_node: pointer to interrupt controller's device tree node. 344 * @size: Number of interrupts in the domain. 345 * @ops: map/unmap domain callbacks 346 * @host_data: Controller private data pointer 347 */ 348 static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_node, 349 unsigned int size, 350 const struct irq_domain_ops *ops, 351 void *host_data) 352 { 353 return __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data); 354 } 355 356 #ifdef CONFIG_IRQ_DOMAIN_NOMAP 357 static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, 358 unsigned int max_irq, 359 const struct irq_domain_ops *ops, 360 void *host_data) 361 { 362 return __irq_domain_add(of_node_to_fwnode(of_node), 0, max_irq, max_irq, ops, host_data); 363 } 364 365 extern unsigned int irq_create_direct_mapping(struct irq_domain *host); 366 #endif 367 368 static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node, 369 const struct irq_domain_ops *ops, 370 void *host_data) 371 { 372 return __irq_domain_add(of_node_to_fwnode(of_node), 0, ~0, 0, ops, host_data); 373 } 374 375 static inline struct irq_domain *irq_domain_create_linear(struct fwnode_handle *fwnode, 376 unsigned int size, 377 const struct irq_domain_ops *ops, 378 void *host_data) 379 { 380 return __irq_domain_add(fwnode, size, size, 0, ops, host_data); 381 } 382 383 static inline struct irq_domain *irq_domain_create_tree(struct fwnode_handle *fwnode, 384 const struct irq_domain_ops *ops, 385 void *host_data) 386 { 387 return __irq_domain_add(fwnode, 0, ~0, 0, ops, host_data); 388 } 389 390 extern void irq_domain_remove(struct irq_domain *host); 391 392 extern int irq_domain_associate(struct irq_domain *domain, unsigned int irq, 393 irq_hw_number_t hwirq); 394 extern void irq_domain_associate_many(struct irq_domain *domain, 395 unsigned int irq_base, 396 irq_hw_number_t hwirq_base, int count); 397 398 extern unsigned int irq_create_mapping_affinity(struct irq_domain *host, 399 irq_hw_number_t hwirq, 400 const struct irq_affinity_desc *affinity); 401 extern unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec); 402 extern void irq_dispose_mapping(unsigned int virq); 403 404 static inline unsigned int irq_create_mapping(struct irq_domain *host, 405 irq_hw_number_t hwirq) 406 { 407 return irq_create_mapping_affinity(host, hwirq, NULL); 408 } 409 410 extern struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain, 411 irq_hw_number_t hwirq, 412 unsigned int *irq); 413 414 static inline struct irq_desc *irq_resolve_mapping(struct irq_domain *domain, 415 irq_hw_number_t hwirq) 416 { 417 return __irq_resolve_mapping(domain, hwirq, NULL); 418 } 419 420 /** 421 * irq_find_mapping() - Find a linux irq from a hw irq number. 422 * @domain: domain owning this hardware interrupt 423 * @hwirq: hardware irq number in that domain space 424 */ 425 static inline unsigned int irq_find_mapping(struct irq_domain *domain, 426 irq_hw_number_t hwirq) 427 { 428 unsigned int irq; 429 430 if (__irq_resolve_mapping(domain, hwirq, &irq)) 431 return irq; 432 433 return 0; 434 } 435 436 static inline unsigned int irq_linear_revmap(struct irq_domain *domain, 437 irq_hw_number_t hwirq) 438 { 439 return irq_find_mapping(domain, hwirq); 440 } 441 442 extern const struct irq_domain_ops irq_domain_simple_ops; 443 444 /* stock xlate functions */ 445 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr, 446 const u32 *intspec, unsigned int intsize, 447 irq_hw_number_t *out_hwirq, unsigned int *out_type); 448 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr, 449 const u32 *intspec, unsigned int intsize, 450 irq_hw_number_t *out_hwirq, unsigned int *out_type); 451 int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr, 452 const u32 *intspec, unsigned int intsize, 453 irq_hw_number_t *out_hwirq, unsigned int *out_type); 454 455 int irq_domain_translate_twocell(struct irq_domain *d, 456 struct irq_fwspec *fwspec, 457 unsigned long *out_hwirq, 458 unsigned int *out_type); 459 460 int irq_domain_translate_onecell(struct irq_domain *d, 461 struct irq_fwspec *fwspec, 462 unsigned long *out_hwirq, 463 unsigned int *out_type); 464 465 /* IPI functions */ 466 int irq_reserve_ipi(struct irq_domain *domain, const struct cpumask *dest); 467 int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest); 468 469 /* V2 interfaces to support hierarchy IRQ domains. */ 470 extern struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, 471 unsigned int virq); 472 extern void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, 473 irq_hw_number_t hwirq, 474 const struct irq_chip *chip, 475 void *chip_data, irq_flow_handler_t handler, 476 void *handler_data, const char *handler_name); 477 extern void irq_domain_reset_irq_data(struct irq_data *irq_data); 478 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 479 extern struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent, 480 unsigned int flags, unsigned int size, 481 struct fwnode_handle *fwnode, 482 const struct irq_domain_ops *ops, void *host_data); 483 484 static inline struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *parent, 485 unsigned int flags, 486 unsigned int size, 487 struct device_node *node, 488 const struct irq_domain_ops *ops, 489 void *host_data) 490 { 491 return irq_domain_create_hierarchy(parent, flags, size, 492 of_node_to_fwnode(node), 493 ops, host_data); 494 } 495 496 extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, 497 unsigned int nr_irqs, int node, void *arg, 498 bool realloc, 499 const struct irq_affinity_desc *affinity); 500 extern void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs); 501 extern int irq_domain_activate_irq(struct irq_data *irq_data, bool early); 502 extern void irq_domain_deactivate_irq(struct irq_data *irq_data); 503 504 static inline int irq_domain_alloc_irqs(struct irq_domain *domain, 505 unsigned int nr_irqs, int node, void *arg) 506 { 507 return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false, 508 NULL); 509 } 510 511 extern int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain, 512 unsigned int irq_base, 513 unsigned int nr_irqs, void *arg); 514 extern int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, 515 unsigned int virq, 516 irq_hw_number_t hwirq, 517 const struct irq_chip *chip, 518 void *chip_data); 519 extern void irq_domain_free_irqs_common(struct irq_domain *domain, 520 unsigned int virq, 521 unsigned int nr_irqs); 522 extern void irq_domain_free_irqs_top(struct irq_domain *domain, 523 unsigned int virq, unsigned int nr_irqs); 524 525 extern int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg); 526 extern int irq_domain_pop_irq(struct irq_domain *domain, int virq); 527 528 extern int irq_domain_alloc_irqs_parent(struct irq_domain *domain, 529 unsigned int irq_base, 530 unsigned int nr_irqs, void *arg); 531 532 extern void irq_domain_free_irqs_parent(struct irq_domain *domain, 533 unsigned int irq_base, 534 unsigned int nr_irqs); 535 536 extern int irq_domain_disconnect_hierarchy(struct irq_domain *domain, 537 unsigned int virq); 538 539 static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) 540 { 541 return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY; 542 } 543 544 static inline bool irq_domain_is_ipi(struct irq_domain *domain) 545 { 546 return domain->flags & 547 (IRQ_DOMAIN_FLAG_IPI_PER_CPU | IRQ_DOMAIN_FLAG_IPI_SINGLE); 548 } 549 550 static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain) 551 { 552 return domain->flags & IRQ_DOMAIN_FLAG_IPI_PER_CPU; 553 } 554 555 static inline bool irq_domain_is_ipi_single(struct irq_domain *domain) 556 { 557 return domain->flags & IRQ_DOMAIN_FLAG_IPI_SINGLE; 558 } 559 560 static inline bool irq_domain_is_msi(struct irq_domain *domain) 561 { 562 return domain->flags & IRQ_DOMAIN_FLAG_MSI; 563 } 564 565 static inline bool irq_domain_is_msi_parent(struct irq_domain *domain) 566 { 567 return domain->flags & IRQ_DOMAIN_FLAG_MSI_PARENT; 568 } 569 570 static inline bool irq_domain_is_msi_device(struct irq_domain *domain) 571 { 572 return domain->flags & IRQ_DOMAIN_FLAG_MSI_DEVICE; 573 } 574 575 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 576 static inline int irq_domain_alloc_irqs(struct irq_domain *domain, 577 unsigned int nr_irqs, int node, void *arg) 578 { 579 return -1; 580 } 581 582 static inline void irq_domain_free_irqs(unsigned int virq, 583 unsigned int nr_irqs) { } 584 585 static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) 586 { 587 return false; 588 } 589 590 static inline bool irq_domain_is_ipi(struct irq_domain *domain) 591 { 592 return false; 593 } 594 595 static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain) 596 { 597 return false; 598 } 599 600 static inline bool irq_domain_is_ipi_single(struct irq_domain *domain) 601 { 602 return false; 603 } 604 605 static inline bool irq_domain_is_msi(struct irq_domain *domain) 606 { 607 return false; 608 } 609 610 static inline bool irq_domain_is_msi_parent(struct irq_domain *domain) 611 { 612 return false; 613 } 614 615 static inline bool irq_domain_is_msi_device(struct irq_domain *domain) 616 { 617 return false; 618 } 619 620 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 621 622 #else /* CONFIG_IRQ_DOMAIN */ 623 static inline void irq_dispose_mapping(unsigned int virq) { } 624 static inline struct irq_domain *irq_find_matching_fwnode( 625 struct fwnode_handle *fwnode, enum irq_domain_bus_token bus_token) 626 { 627 return NULL; 628 } 629 #endif /* !CONFIG_IRQ_DOMAIN */ 630 631 #endif /* _LINUX_IRQDOMAIN_H */ 632