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/irqhandler.h> 35 #include <linux/of.h> 36 #include <linux/mutex.h> 37 #include <linux/radix-tree.h> 38 39 struct device_node; 40 struct fwnode_handle; 41 struct irq_domain; 42 struct irq_chip; 43 struct irq_data; 44 struct irq_desc; 45 struct cpumask; 46 struct seq_file; 47 struct irq_affinity_desc; 48 49 #define IRQ_DOMAIN_IRQ_SPEC_PARAMS 16 50 51 /** 52 * struct irq_fwspec - generic IRQ specifier structure 53 * 54 * @fwnode: Pointer to a firmware-specific descriptor 55 * @param_count: Number of device-specific parameters 56 * @param: Device-specific parameters 57 * 58 * This structure, directly modeled after of_phandle_args, is used to 59 * pass a device-specific description of an interrupt. 60 */ 61 struct irq_fwspec { 62 struct fwnode_handle *fwnode; 63 int param_count; 64 u32 param[IRQ_DOMAIN_IRQ_SPEC_PARAMS]; 65 }; 66 67 /* 68 * Should several domains have the same device node, but serve 69 * different purposes (for example one domain is for PCI/MSI, and the 70 * other for wired IRQs), they can be distinguished using a 71 * bus-specific token. Most domains are expected to only carry 72 * DOMAIN_BUS_ANY. 73 */ 74 enum irq_domain_bus_token { 75 DOMAIN_BUS_ANY = 0, 76 DOMAIN_BUS_WIRED, 77 DOMAIN_BUS_GENERIC_MSI, 78 DOMAIN_BUS_PCI_MSI, 79 DOMAIN_BUS_PLATFORM_MSI, 80 DOMAIN_BUS_NEXUS, 81 DOMAIN_BUS_IPI, 82 DOMAIN_BUS_FSL_MC_MSI, 83 DOMAIN_BUS_TI_SCI_INTA_MSI, 84 DOMAIN_BUS_WAKEUP, 85 DOMAIN_BUS_VMD_MSI, 86 }; 87 88 /** 89 * struct irq_domain_ops - Methods for irq_domain objects 90 * @match: Match an interrupt controller device node to a host, returns 91 * 1 on a match 92 * @map: Create or update a mapping between a virtual irq number and a hw 93 * irq number. This is called only once for a given mapping. 94 * @unmap: Dispose of such a mapping 95 * @xlate: Given a device tree node and interrupt specifier, decode 96 * the hardware irq number and linux irq type value. 97 * 98 * Functions below are provided by the driver and called whenever a new mapping 99 * is created or an old mapping is disposed. The driver can then proceed to 100 * whatever internal data structures management is required. It also needs 101 * to setup the irq_desc when returning from map(). 102 */ 103 struct irq_domain_ops { 104 int (*match)(struct irq_domain *d, struct device_node *node, 105 enum irq_domain_bus_token bus_token); 106 int (*select)(struct irq_domain *d, struct irq_fwspec *fwspec, 107 enum irq_domain_bus_token bus_token); 108 int (*map)(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw); 109 void (*unmap)(struct irq_domain *d, unsigned int virq); 110 int (*xlate)(struct irq_domain *d, struct device_node *node, 111 const u32 *intspec, unsigned int intsize, 112 unsigned long *out_hwirq, unsigned int *out_type); 113 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 114 /* extended V2 interfaces to support hierarchy irq_domains */ 115 int (*alloc)(struct irq_domain *d, unsigned int virq, 116 unsigned int nr_irqs, void *arg); 117 void (*free)(struct irq_domain *d, unsigned int virq, 118 unsigned int nr_irqs); 119 int (*activate)(struct irq_domain *d, struct irq_data *irqd, bool reserve); 120 void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data); 121 int (*translate)(struct irq_domain *d, struct irq_fwspec *fwspec, 122 unsigned long *out_hwirq, unsigned int *out_type); 123 #endif 124 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS 125 void (*debug_show)(struct seq_file *m, struct irq_domain *d, 126 struct irq_data *irqd, int ind); 127 #endif 128 }; 129 130 extern struct irq_domain_ops irq_generic_chip_ops; 131 132 struct irq_domain_chip_generic; 133 134 /** 135 * struct irq_domain - Hardware interrupt number translation object 136 * @link: Element in global irq_domain list. 137 * @name: Name of interrupt domain 138 * @ops: pointer to irq_domain methods 139 * @host_data: private data pointer for use by owner. Not touched by irq_domain 140 * core code. 141 * @flags: host per irq_domain flags 142 * @mapcount: The number of mapped interrupts 143 * 144 * Optional elements 145 * @fwnode: Pointer to firmware node associated with the irq_domain. Pretty easy 146 * to swap it for the of_node via the irq_domain_get_of_node accessor 147 * @gc: Pointer to a list of generic chips. There is a helper function for 148 * setting up one or more generic chips for interrupt controllers 149 * drivers using the generic chip library which uses this pointer. 150 * @parent: Pointer to parent irq_domain to support hierarchy irq_domains 151 * 152 * Revmap data, used internally by irq_domain 153 * @revmap_size: Size of the linear map table @revmap[] 154 * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map 155 * @revmap_mutex: Lock for the revmap 156 * @revmap: Linear table of irq_data pointers 157 */ 158 struct irq_domain { 159 struct list_head link; 160 const char *name; 161 const struct irq_domain_ops *ops; 162 void *host_data; 163 unsigned int flags; 164 unsigned int mapcount; 165 166 /* Optional data */ 167 struct fwnode_handle *fwnode; 168 enum irq_domain_bus_token bus_token; 169 struct irq_domain_chip_generic *gc; 170 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 171 struct irq_domain *parent; 172 #endif 173 174 /* reverse map data. The linear map gets appended to the irq_domain */ 175 irq_hw_number_t hwirq_max; 176 unsigned int revmap_size; 177 struct radix_tree_root revmap_tree; 178 struct mutex revmap_mutex; 179 struct irq_data __rcu *revmap[]; 180 }; 181 182 /* Irq domain flags */ 183 enum { 184 /* Irq domain is hierarchical */ 185 IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0), 186 187 /* Irq domain name was allocated in __irq_domain_add() */ 188 IRQ_DOMAIN_NAME_ALLOCATED = (1 << 1), 189 190 /* Irq domain is an IPI domain with virq per cpu */ 191 IRQ_DOMAIN_FLAG_IPI_PER_CPU = (1 << 2), 192 193 /* Irq domain is an IPI domain with single virq */ 194 IRQ_DOMAIN_FLAG_IPI_SINGLE = (1 << 3), 195 196 /* Irq domain implements MSIs */ 197 IRQ_DOMAIN_FLAG_MSI = (1 << 4), 198 199 /* Irq domain implements MSI remapping */ 200 IRQ_DOMAIN_FLAG_MSI_REMAP = (1 << 5), 201 202 /* 203 * Quirk to handle MSI implementations which do not provide 204 * masking. Currently known to affect x86, but partially 205 * handled in core code. 206 */ 207 IRQ_DOMAIN_MSI_NOMASK_QUIRK = (1 << 6), 208 209 /* Irq domain doesn't translate anything */ 210 IRQ_DOMAIN_FLAG_NO_MAP = (1 << 7), 211 212 /* 213 * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved 214 * for implementation specific purposes and ignored by the 215 * core code. 216 */ 217 IRQ_DOMAIN_FLAG_NONCORE = (1 << 16), 218 }; 219 220 static inline struct device_node *irq_domain_get_of_node(struct irq_domain *d) 221 { 222 return to_of_node(d->fwnode); 223 } 224 225 #ifdef CONFIG_IRQ_DOMAIN 226 struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id, 227 const char *name, phys_addr_t *pa); 228 229 enum { 230 IRQCHIP_FWNODE_REAL, 231 IRQCHIP_FWNODE_NAMED, 232 IRQCHIP_FWNODE_NAMED_ID, 233 }; 234 235 static inline 236 struct fwnode_handle *irq_domain_alloc_named_fwnode(const char *name) 237 { 238 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED, 0, name, NULL); 239 } 240 241 static inline 242 struct fwnode_handle *irq_domain_alloc_named_id_fwnode(const char *name, int id) 243 { 244 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED_ID, id, name, 245 NULL); 246 } 247 248 static inline struct fwnode_handle *irq_domain_alloc_fwnode(phys_addr_t *pa) 249 { 250 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_REAL, 0, NULL, pa); 251 } 252 253 void irq_domain_free_fwnode(struct fwnode_handle *fwnode); 254 struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size, 255 irq_hw_number_t hwirq_max, int direct_max, 256 const struct irq_domain_ops *ops, 257 void *host_data); 258 struct irq_domain *irq_domain_create_simple(struct fwnode_handle *fwnode, 259 unsigned int size, 260 unsigned int first_irq, 261 const struct irq_domain_ops *ops, 262 void *host_data); 263 struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, 264 unsigned int size, 265 unsigned int first_irq, 266 irq_hw_number_t first_hwirq, 267 const struct irq_domain_ops *ops, 268 void *host_data); 269 struct irq_domain *irq_domain_create_legacy(struct fwnode_handle *fwnode, 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 extern struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec, 276 enum irq_domain_bus_token bus_token); 277 extern bool irq_domain_check_msi_remap(void); 278 extern void irq_set_default_host(struct irq_domain *host); 279 extern struct irq_domain *irq_get_default_host(void); 280 extern int irq_domain_alloc_descs(int virq, unsigned int nr_irqs, 281 irq_hw_number_t hwirq, int node, 282 const struct irq_affinity_desc *affinity); 283 284 static inline struct fwnode_handle *of_node_to_fwnode(struct device_node *node) 285 { 286 return node ? &node->fwnode : NULL; 287 } 288 289 extern const struct fwnode_operations irqchip_fwnode_ops; 290 291 static inline bool is_fwnode_irqchip(struct fwnode_handle *fwnode) 292 { 293 return fwnode && fwnode->ops == &irqchip_fwnode_ops; 294 } 295 296 extern void irq_domain_update_bus_token(struct irq_domain *domain, 297 enum irq_domain_bus_token bus_token); 298 299 static inline 300 struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, 301 enum irq_domain_bus_token bus_token) 302 { 303 struct irq_fwspec fwspec = { 304 .fwnode = fwnode, 305 }; 306 307 return irq_find_matching_fwspec(&fwspec, bus_token); 308 } 309 310 static inline struct irq_domain *irq_find_matching_host(struct device_node *node, 311 enum irq_domain_bus_token bus_token) 312 { 313 return irq_find_matching_fwnode(of_node_to_fwnode(node), bus_token); 314 } 315 316 static inline struct irq_domain *irq_find_host(struct device_node *node) 317 { 318 struct irq_domain *d; 319 320 d = irq_find_matching_host(node, DOMAIN_BUS_WIRED); 321 if (!d) 322 d = irq_find_matching_host(node, DOMAIN_BUS_ANY); 323 324 return d; 325 } 326 327 static inline struct irq_domain *irq_domain_add_simple(struct device_node *of_node, 328 unsigned int size, 329 unsigned int first_irq, 330 const struct irq_domain_ops *ops, 331 void *host_data) 332 { 333 return irq_domain_create_simple(of_node_to_fwnode(of_node), size, first_irq, ops, host_data); 334 } 335 336 /** 337 * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain. 338 * @of_node: pointer to interrupt controller's device tree node. 339 * @size: Number of interrupts in the domain. 340 * @ops: map/unmap domain callbacks 341 * @host_data: Controller private data pointer 342 */ 343 static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_node, 344 unsigned int size, 345 const struct irq_domain_ops *ops, 346 void *host_data) 347 { 348 return __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data); 349 } 350 351 #ifdef CONFIG_IRQ_DOMAIN_NOMAP 352 static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, 353 unsigned int max_irq, 354 const struct irq_domain_ops *ops, 355 void *host_data) 356 { 357 return __irq_domain_add(of_node_to_fwnode(of_node), 0, max_irq, max_irq, ops, host_data); 358 } 359 360 extern unsigned int irq_create_direct_mapping(struct irq_domain *host); 361 #endif 362 363 static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node, 364 const struct irq_domain_ops *ops, 365 void *host_data) 366 { 367 return __irq_domain_add(of_node_to_fwnode(of_node), 0, ~0, 0, ops, host_data); 368 } 369 370 static inline struct irq_domain *irq_domain_create_linear(struct fwnode_handle *fwnode, 371 unsigned int size, 372 const struct irq_domain_ops *ops, 373 void *host_data) 374 { 375 return __irq_domain_add(fwnode, size, size, 0, ops, host_data); 376 } 377 378 static inline struct irq_domain *irq_domain_create_tree(struct fwnode_handle *fwnode, 379 const struct irq_domain_ops *ops, 380 void *host_data) 381 { 382 return __irq_domain_add(fwnode, 0, ~0, 0, ops, host_data); 383 } 384 385 extern void irq_domain_remove(struct irq_domain *host); 386 387 extern int irq_domain_associate(struct irq_domain *domain, unsigned int irq, 388 irq_hw_number_t hwirq); 389 extern void irq_domain_associate_many(struct irq_domain *domain, 390 unsigned int irq_base, 391 irq_hw_number_t hwirq_base, int count); 392 393 extern unsigned int irq_create_mapping_affinity(struct irq_domain *host, 394 irq_hw_number_t hwirq, 395 const struct irq_affinity_desc *affinity); 396 extern unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec); 397 extern void irq_dispose_mapping(unsigned int virq); 398 399 static inline unsigned int irq_create_mapping(struct irq_domain *host, 400 irq_hw_number_t hwirq) 401 { 402 return irq_create_mapping_affinity(host, hwirq, NULL); 403 } 404 405 extern struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain, 406 irq_hw_number_t hwirq, 407 unsigned int *irq); 408 409 static inline struct irq_desc *irq_resolve_mapping(struct irq_domain *domain, 410 irq_hw_number_t hwirq) 411 { 412 return __irq_resolve_mapping(domain, hwirq, NULL); 413 } 414 415 /** 416 * irq_find_mapping() - Find a linux irq from a hw irq number. 417 * @domain: domain owning this hardware interrupt 418 * @hwirq: hardware irq number in that domain space 419 */ 420 static inline unsigned int irq_find_mapping(struct irq_domain *domain, 421 irq_hw_number_t hwirq) 422 { 423 unsigned int irq; 424 425 if (__irq_resolve_mapping(domain, hwirq, &irq)) 426 return irq; 427 428 return 0; 429 } 430 431 static inline unsigned int irq_linear_revmap(struct irq_domain *domain, 432 irq_hw_number_t hwirq) 433 { 434 return irq_find_mapping(domain, hwirq); 435 } 436 437 extern const struct irq_domain_ops irq_domain_simple_ops; 438 439 /* stock xlate functions */ 440 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr, 441 const u32 *intspec, unsigned int intsize, 442 irq_hw_number_t *out_hwirq, unsigned int *out_type); 443 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr, 444 const u32 *intspec, unsigned int intsize, 445 irq_hw_number_t *out_hwirq, unsigned int *out_type); 446 int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr, 447 const u32 *intspec, unsigned int intsize, 448 irq_hw_number_t *out_hwirq, unsigned int *out_type); 449 450 int irq_domain_translate_twocell(struct irq_domain *d, 451 struct irq_fwspec *fwspec, 452 unsigned long *out_hwirq, 453 unsigned int *out_type); 454 455 int irq_domain_translate_onecell(struct irq_domain *d, 456 struct irq_fwspec *fwspec, 457 unsigned long *out_hwirq, 458 unsigned int *out_type); 459 460 /* IPI functions */ 461 int irq_reserve_ipi(struct irq_domain *domain, const struct cpumask *dest); 462 int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest); 463 464 /* V2 interfaces to support hierarchy IRQ domains. */ 465 extern struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, 466 unsigned int virq); 467 extern void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, 468 irq_hw_number_t hwirq, struct irq_chip *chip, 469 void *chip_data, irq_flow_handler_t handler, 470 void *handler_data, const char *handler_name); 471 extern void irq_domain_reset_irq_data(struct irq_data *irq_data); 472 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 473 extern struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent, 474 unsigned int flags, unsigned int size, 475 struct fwnode_handle *fwnode, 476 const struct irq_domain_ops *ops, void *host_data); 477 478 static inline struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *parent, 479 unsigned int flags, 480 unsigned int size, 481 struct device_node *node, 482 const struct irq_domain_ops *ops, 483 void *host_data) 484 { 485 return irq_domain_create_hierarchy(parent, flags, size, 486 of_node_to_fwnode(node), 487 ops, host_data); 488 } 489 490 extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, 491 unsigned int nr_irqs, int node, void *arg, 492 bool realloc, 493 const struct irq_affinity_desc *affinity); 494 extern void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs); 495 extern int irq_domain_activate_irq(struct irq_data *irq_data, bool early); 496 extern void irq_domain_deactivate_irq(struct irq_data *irq_data); 497 498 static inline int irq_domain_alloc_irqs(struct irq_domain *domain, 499 unsigned int nr_irqs, int node, void *arg) 500 { 501 return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false, 502 NULL); 503 } 504 505 extern int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain, 506 unsigned int irq_base, 507 unsigned int nr_irqs, void *arg); 508 extern int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, 509 unsigned int virq, 510 irq_hw_number_t hwirq, 511 struct irq_chip *chip, 512 void *chip_data); 513 extern void irq_domain_free_irqs_common(struct irq_domain *domain, 514 unsigned int virq, 515 unsigned int nr_irqs); 516 extern void irq_domain_free_irqs_top(struct irq_domain *domain, 517 unsigned int virq, unsigned int nr_irqs); 518 519 extern int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg); 520 extern int irq_domain_pop_irq(struct irq_domain *domain, int virq); 521 522 extern int irq_domain_alloc_irqs_parent(struct irq_domain *domain, 523 unsigned int irq_base, 524 unsigned int nr_irqs, void *arg); 525 526 extern void irq_domain_free_irqs_parent(struct irq_domain *domain, 527 unsigned int irq_base, 528 unsigned int nr_irqs); 529 530 extern int irq_domain_disconnect_hierarchy(struct irq_domain *domain, 531 unsigned int virq); 532 533 static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) 534 { 535 return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY; 536 } 537 538 static inline bool irq_domain_is_ipi(struct irq_domain *domain) 539 { 540 return domain->flags & 541 (IRQ_DOMAIN_FLAG_IPI_PER_CPU | IRQ_DOMAIN_FLAG_IPI_SINGLE); 542 } 543 544 static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain) 545 { 546 return domain->flags & IRQ_DOMAIN_FLAG_IPI_PER_CPU; 547 } 548 549 static inline bool irq_domain_is_ipi_single(struct irq_domain *domain) 550 { 551 return domain->flags & IRQ_DOMAIN_FLAG_IPI_SINGLE; 552 } 553 554 static inline bool irq_domain_is_msi(struct irq_domain *domain) 555 { 556 return domain->flags & IRQ_DOMAIN_FLAG_MSI; 557 } 558 559 static inline bool irq_domain_is_msi_remap(struct irq_domain *domain) 560 { 561 return domain->flags & IRQ_DOMAIN_FLAG_MSI_REMAP; 562 } 563 564 extern bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain); 565 566 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 567 static inline int irq_domain_alloc_irqs(struct irq_domain *domain, 568 unsigned int nr_irqs, int node, void *arg) 569 { 570 return -1; 571 } 572 573 static inline void irq_domain_free_irqs(unsigned int virq, 574 unsigned int nr_irqs) { } 575 576 static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) 577 { 578 return false; 579 } 580 581 static inline bool irq_domain_is_ipi(struct irq_domain *domain) 582 { 583 return false; 584 } 585 586 static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain) 587 { 588 return false; 589 } 590 591 static inline bool irq_domain_is_ipi_single(struct irq_domain *domain) 592 { 593 return false; 594 } 595 596 static inline bool irq_domain_is_msi(struct irq_domain *domain) 597 { 598 return false; 599 } 600 601 static inline bool irq_domain_is_msi_remap(struct irq_domain *domain) 602 { 603 return false; 604 } 605 606 static inline bool 607 irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain) 608 { 609 return false; 610 } 611 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 612 613 #else /* CONFIG_IRQ_DOMAIN */ 614 static inline void irq_dispose_mapping(unsigned int virq) { } 615 static inline struct irq_domain *irq_find_matching_fwnode( 616 struct fwnode_handle *fwnode, enum irq_domain_bus_token bus_token) 617 { 618 return NULL; 619 } 620 static inline bool irq_domain_check_msi_remap(void) 621 { 622 return false; 623 } 624 #endif /* !CONFIG_IRQ_DOMAIN */ 625 626 #endif /* _LINUX_IRQDOMAIN_H */ 627