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 cpumask; 45 struct seq_file; 46 struct irq_affinity_desc; 47 48 /* Number of irqs reserved for a legacy isa controller */ 49 #define NUM_ISA_INTERRUPTS 16 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 /* 70 * Should several domains have the same device node, but serve 71 * different purposes (for example one domain is for PCI/MSI, and the 72 * other for wired IRQs), they can be distinguished using a 73 * bus-specific token. Most domains are expected to only carry 74 * DOMAIN_BUS_ANY. 75 */ 76 enum irq_domain_bus_token { 77 DOMAIN_BUS_ANY = 0, 78 DOMAIN_BUS_WIRED, 79 DOMAIN_BUS_GENERIC_MSI, 80 DOMAIN_BUS_PCI_MSI, 81 DOMAIN_BUS_PLATFORM_MSI, 82 DOMAIN_BUS_NEXUS, 83 DOMAIN_BUS_IPI, 84 DOMAIN_BUS_FSL_MC_MSI, 85 DOMAIN_BUS_TI_SCI_INTA_MSI, 86 DOMAIN_BUS_WAKEUP, 87 DOMAIN_BUS_VMD_MSI, 88 }; 89 90 /** 91 * struct irq_domain_ops - Methods for irq_domain objects 92 * @match: Match an interrupt controller device node to a host, returns 93 * 1 on a match 94 * @map: Create or update a mapping between a virtual irq number and a hw 95 * irq number. This is called only once for a given mapping. 96 * @unmap: Dispose of such a mapping 97 * @xlate: Given a device tree node and interrupt specifier, decode 98 * the hardware irq number and linux irq type value. 99 * 100 * Functions below are provided by the driver and called whenever a new mapping 101 * is created or an old mapping is disposed. The driver can then proceed to 102 * whatever internal data structures management is required. It also needs 103 * to setup the irq_desc when returning from map(). 104 */ 105 struct irq_domain_ops { 106 int (*match)(struct irq_domain *d, struct device_node *node, 107 enum irq_domain_bus_token bus_token); 108 int (*select)(struct irq_domain *d, struct irq_fwspec *fwspec, 109 enum irq_domain_bus_token bus_token); 110 int (*map)(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw); 111 void (*unmap)(struct irq_domain *d, unsigned int virq); 112 int (*xlate)(struct irq_domain *d, struct device_node *node, 113 const u32 *intspec, unsigned int intsize, 114 unsigned long *out_hwirq, unsigned int *out_type); 115 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 116 /* extended V2 interfaces to support hierarchy irq_domains */ 117 int (*alloc)(struct irq_domain *d, unsigned int virq, 118 unsigned int nr_irqs, void *arg); 119 void (*free)(struct irq_domain *d, unsigned int virq, 120 unsigned int nr_irqs); 121 int (*activate)(struct irq_domain *d, struct irq_data *irqd, bool reserve); 122 void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data); 123 int (*translate)(struct irq_domain *d, struct irq_fwspec *fwspec, 124 unsigned long *out_hwirq, unsigned int *out_type); 125 #endif 126 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS 127 void (*debug_show)(struct seq_file *m, struct irq_domain *d, 128 struct irq_data *irqd, int ind); 129 #endif 130 }; 131 132 extern struct irq_domain_ops irq_generic_chip_ops; 133 134 struct irq_domain_chip_generic; 135 136 /** 137 * struct irq_domain - Hardware interrupt number translation object 138 * @link: Element in global irq_domain list. 139 * @name: Name of interrupt domain 140 * @ops: pointer to irq_domain methods 141 * @host_data: private data pointer for use by owner. Not touched by irq_domain 142 * core code. 143 * @flags: host per irq_domain flags 144 * @mapcount: The number of mapped interrupts 145 * 146 * Optional elements 147 * @fwnode: Pointer to firmware node associated with the irq_domain. Pretty easy 148 * to swap it for the of_node via the irq_domain_get_of_node accessor 149 * @gc: Pointer to a list of generic chips. There is a helper function for 150 * setting up one or more generic chips for interrupt controllers 151 * drivers using the generic chip library which uses this pointer. 152 * @parent: Pointer to parent irq_domain to support hierarchy irq_domains 153 * @debugfs_file: dentry for the domain debugfs file 154 * 155 * Revmap data, used internally by irq_domain 156 * @revmap_direct_max_irq: The largest hwirq that can be set for controllers that 157 * support direct mapping 158 * @revmap_size: Size of the linear map table @linear_revmap[] 159 * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map 160 * @linear_revmap: Linear table of hwirq->virq reverse mappings 161 */ 162 struct irq_domain { 163 struct list_head link; 164 const char *name; 165 const struct irq_domain_ops *ops; 166 void *host_data; 167 unsigned int flags; 168 unsigned int mapcount; 169 170 /* Optional data */ 171 struct fwnode_handle *fwnode; 172 enum irq_domain_bus_token bus_token; 173 struct irq_domain_chip_generic *gc; 174 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 175 struct irq_domain *parent; 176 #endif 177 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS 178 struct dentry *debugfs_file; 179 #endif 180 181 /* reverse map data. The linear map gets appended to the irq_domain */ 182 irq_hw_number_t hwirq_max; 183 unsigned int revmap_direct_max_irq; 184 unsigned int revmap_size; 185 struct radix_tree_root revmap_tree; 186 struct mutex revmap_tree_mutex; 187 unsigned int linear_revmap[]; 188 }; 189 190 /* Irq domain flags */ 191 enum { 192 /* Irq domain is hierarchical */ 193 IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0), 194 195 /* Irq domain name was allocated in __irq_domain_add() */ 196 IRQ_DOMAIN_NAME_ALLOCATED = (1 << 1), 197 198 /* Irq domain is an IPI domain with virq per cpu */ 199 IRQ_DOMAIN_FLAG_IPI_PER_CPU = (1 << 2), 200 201 /* Irq domain is an IPI domain with single virq */ 202 IRQ_DOMAIN_FLAG_IPI_SINGLE = (1 << 3), 203 204 /* Irq domain implements MSIs */ 205 IRQ_DOMAIN_FLAG_MSI = (1 << 4), 206 207 /* Irq domain implements MSI remapping */ 208 IRQ_DOMAIN_FLAG_MSI_REMAP = (1 << 5), 209 210 /* 211 * Quirk to handle MSI implementations which do not provide 212 * masking. Currently known to affect x86, but partially 213 * handled in core code. 214 */ 215 IRQ_DOMAIN_MSI_NOMASK_QUIRK = (1 << 6), 216 217 /* 218 * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved 219 * for implementation specific purposes and ignored by the 220 * core code. 221 */ 222 IRQ_DOMAIN_FLAG_NONCORE = (1 << 16), 223 }; 224 225 static inline struct device_node *irq_domain_get_of_node(struct irq_domain *d) 226 { 227 return to_of_node(d->fwnode); 228 } 229 230 #ifdef CONFIG_IRQ_DOMAIN 231 struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id, 232 const char *name, phys_addr_t *pa); 233 234 enum { 235 IRQCHIP_FWNODE_REAL, 236 IRQCHIP_FWNODE_NAMED, 237 IRQCHIP_FWNODE_NAMED_ID, 238 }; 239 240 static inline 241 struct fwnode_handle *irq_domain_alloc_named_fwnode(const char *name) 242 { 243 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED, 0, name, NULL); 244 } 245 246 static inline 247 struct fwnode_handle *irq_domain_alloc_named_id_fwnode(const char *name, int id) 248 { 249 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED_ID, id, name, 250 NULL); 251 } 252 253 static inline struct fwnode_handle *irq_domain_alloc_fwnode(phys_addr_t *pa) 254 { 255 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_REAL, 0, NULL, pa); 256 } 257 258 void irq_domain_free_fwnode(struct fwnode_handle *fwnode); 259 struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size, 260 irq_hw_number_t hwirq_max, int direct_max, 261 const struct irq_domain_ops *ops, 262 void *host_data); 263 struct irq_domain *irq_domain_add_simple(struct device_node *of_node, 264 unsigned int size, 265 unsigned int first_irq, 266 const struct irq_domain_ops *ops, 267 void *host_data); 268 struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, 269 unsigned int size, 270 unsigned int first_irq, 271 irq_hw_number_t first_hwirq, 272 const struct irq_domain_ops *ops, 273 void *host_data); 274 struct irq_domain *irq_domain_create_legacy(struct fwnode_handle *fwnode, 275 unsigned int size, 276 unsigned int first_irq, 277 irq_hw_number_t first_hwirq, 278 const struct irq_domain_ops *ops, 279 void *host_data); 280 extern struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec, 281 enum irq_domain_bus_token bus_token); 282 extern bool irq_domain_check_msi_remap(void); 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 /** 333 * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain. 334 * @of_node: pointer to interrupt controller's device tree node. 335 * @size: Number of interrupts in the domain. 336 * @ops: map/unmap domain callbacks 337 * @host_data: Controller private data pointer 338 */ 339 static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_node, 340 unsigned int size, 341 const struct irq_domain_ops *ops, 342 void *host_data) 343 { 344 return __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data); 345 } 346 static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, 347 unsigned int max_irq, 348 const struct irq_domain_ops *ops, 349 void *host_data) 350 { 351 return __irq_domain_add(of_node_to_fwnode(of_node), 0, max_irq, max_irq, ops, host_data); 352 } 353 static inline struct irq_domain *irq_domain_add_legacy_isa( 354 struct device_node *of_node, 355 const struct irq_domain_ops *ops, 356 void *host_data) 357 { 358 return irq_domain_add_legacy(of_node, NUM_ISA_INTERRUPTS, 0, 0, ops, 359 host_data); 360 } 361 static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node, 362 const struct irq_domain_ops *ops, 363 void *host_data) 364 { 365 return __irq_domain_add(of_node_to_fwnode(of_node), 0, ~0, 0, ops, host_data); 366 } 367 368 static inline struct irq_domain *irq_domain_create_linear(struct fwnode_handle *fwnode, 369 unsigned int size, 370 const struct irq_domain_ops *ops, 371 void *host_data) 372 { 373 return __irq_domain_add(fwnode, size, size, 0, ops, host_data); 374 } 375 376 static inline struct irq_domain *irq_domain_create_tree(struct fwnode_handle *fwnode, 377 const struct irq_domain_ops *ops, 378 void *host_data) 379 { 380 return __irq_domain_add(fwnode, 0, ~0, 0, ops, host_data); 381 } 382 383 extern void irq_domain_remove(struct irq_domain *host); 384 385 extern int irq_domain_associate(struct irq_domain *domain, unsigned int irq, 386 irq_hw_number_t hwirq); 387 extern void irq_domain_associate_many(struct irq_domain *domain, 388 unsigned int irq_base, 389 irq_hw_number_t hwirq_base, int count); 390 391 extern unsigned int irq_create_mapping_affinity(struct irq_domain *host, 392 irq_hw_number_t hwirq, 393 const struct irq_affinity_desc *affinity); 394 extern unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec); 395 extern void irq_dispose_mapping(unsigned int virq); 396 397 static inline unsigned int irq_create_mapping(struct irq_domain *host, 398 irq_hw_number_t hwirq) 399 { 400 return irq_create_mapping_affinity(host, hwirq, NULL); 401 } 402 403 404 /** 405 * irq_linear_revmap() - Find a linux irq from a hw irq number. 406 * @domain: domain owning this hardware interrupt 407 * @hwirq: hardware irq number in that domain space 408 * 409 * This is a fast path alternative to irq_find_mapping() that can be 410 * called directly by irq controller code to save a handful of 411 * instructions. It is always safe to call, but won't find irqs mapped 412 * using the radix tree. 413 */ 414 static inline unsigned int irq_linear_revmap(struct irq_domain *domain, 415 irq_hw_number_t hwirq) 416 { 417 return hwirq < domain->revmap_size ? domain->linear_revmap[hwirq] : 0; 418 } 419 extern unsigned int irq_find_mapping(struct irq_domain *host, 420 irq_hw_number_t hwirq); 421 extern unsigned int irq_create_direct_mapping(struct irq_domain *host); 422 extern int irq_create_strict_mappings(struct irq_domain *domain, 423 unsigned int irq_base, 424 irq_hw_number_t hwirq_base, int count); 425 426 static inline int irq_create_identity_mapping(struct irq_domain *host, 427 irq_hw_number_t hwirq) 428 { 429 return irq_create_strict_mappings(host, hwirq, hwirq, 1); 430 } 431 432 extern const struct irq_domain_ops irq_domain_simple_ops; 433 434 /* stock xlate functions */ 435 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr, 436 const u32 *intspec, unsigned int intsize, 437 irq_hw_number_t *out_hwirq, unsigned int *out_type); 438 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr, 439 const u32 *intspec, unsigned int intsize, 440 irq_hw_number_t *out_hwirq, unsigned int *out_type); 441 int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr, 442 const u32 *intspec, unsigned int intsize, 443 irq_hw_number_t *out_hwirq, unsigned int *out_type); 444 445 int irq_domain_translate_twocell(struct irq_domain *d, 446 struct irq_fwspec *fwspec, 447 unsigned long *out_hwirq, 448 unsigned int *out_type); 449 450 int irq_domain_translate_onecell(struct irq_domain *d, 451 struct irq_fwspec *fwspec, 452 unsigned long *out_hwirq, 453 unsigned int *out_type); 454 455 /* IPI functions */ 456 int irq_reserve_ipi(struct irq_domain *domain, const struct cpumask *dest); 457 int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest); 458 459 /* V2 interfaces to support hierarchy IRQ domains. */ 460 extern struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, 461 unsigned int virq); 462 extern void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, 463 irq_hw_number_t hwirq, struct irq_chip *chip, 464 void *chip_data, irq_flow_handler_t handler, 465 void *handler_data, const char *handler_name); 466 extern void irq_domain_reset_irq_data(struct irq_data *irq_data); 467 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 468 extern struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent, 469 unsigned int flags, unsigned int size, 470 struct fwnode_handle *fwnode, 471 const struct irq_domain_ops *ops, void *host_data); 472 473 static inline struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *parent, 474 unsigned int flags, 475 unsigned int size, 476 struct device_node *node, 477 const struct irq_domain_ops *ops, 478 void *host_data) 479 { 480 return irq_domain_create_hierarchy(parent, flags, size, 481 of_node_to_fwnode(node), 482 ops, host_data); 483 } 484 485 extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, 486 unsigned int nr_irqs, int node, void *arg, 487 bool realloc, 488 const struct irq_affinity_desc *affinity); 489 extern void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs); 490 extern int irq_domain_activate_irq(struct irq_data *irq_data, bool early); 491 extern void irq_domain_deactivate_irq(struct irq_data *irq_data); 492 493 static inline int irq_domain_alloc_irqs(struct irq_domain *domain, 494 unsigned int nr_irqs, int node, void *arg) 495 { 496 return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false, 497 NULL); 498 } 499 500 extern int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain, 501 unsigned int irq_base, 502 unsigned int nr_irqs, void *arg); 503 extern int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, 504 unsigned int virq, 505 irq_hw_number_t hwirq, 506 struct irq_chip *chip, 507 void *chip_data); 508 extern void irq_domain_free_irqs_common(struct irq_domain *domain, 509 unsigned int virq, 510 unsigned int nr_irqs); 511 extern void irq_domain_free_irqs_top(struct irq_domain *domain, 512 unsigned int virq, unsigned int nr_irqs); 513 514 extern int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg); 515 extern int irq_domain_pop_irq(struct irq_domain *domain, int virq); 516 517 extern int irq_domain_alloc_irqs_parent(struct irq_domain *domain, 518 unsigned int irq_base, 519 unsigned int nr_irqs, void *arg); 520 521 extern void irq_domain_free_irqs_parent(struct irq_domain *domain, 522 unsigned int irq_base, 523 unsigned int nr_irqs); 524 525 extern int irq_domain_disconnect_hierarchy(struct irq_domain *domain, 526 unsigned int virq); 527 528 static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) 529 { 530 return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY; 531 } 532 533 static inline bool irq_domain_is_ipi(struct irq_domain *domain) 534 { 535 return domain->flags & 536 (IRQ_DOMAIN_FLAG_IPI_PER_CPU | IRQ_DOMAIN_FLAG_IPI_SINGLE); 537 } 538 539 static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain) 540 { 541 return domain->flags & IRQ_DOMAIN_FLAG_IPI_PER_CPU; 542 } 543 544 static inline bool irq_domain_is_ipi_single(struct irq_domain *domain) 545 { 546 return domain->flags & IRQ_DOMAIN_FLAG_IPI_SINGLE; 547 } 548 549 static inline bool irq_domain_is_msi(struct irq_domain *domain) 550 { 551 return domain->flags & IRQ_DOMAIN_FLAG_MSI; 552 } 553 554 static inline bool irq_domain_is_msi_remap(struct irq_domain *domain) 555 { 556 return domain->flags & IRQ_DOMAIN_FLAG_MSI_REMAP; 557 } 558 559 extern bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain); 560 561 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 562 static inline int irq_domain_alloc_irqs(struct irq_domain *domain, 563 unsigned int nr_irqs, int node, void *arg) 564 { 565 return -1; 566 } 567 568 static inline void irq_domain_free_irqs(unsigned int virq, 569 unsigned int nr_irqs) { } 570 571 static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) 572 { 573 return false; 574 } 575 576 static inline bool irq_domain_is_ipi(struct irq_domain *domain) 577 { 578 return false; 579 } 580 581 static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain) 582 { 583 return false; 584 } 585 586 static inline bool irq_domain_is_ipi_single(struct irq_domain *domain) 587 { 588 return false; 589 } 590 591 static inline bool irq_domain_is_msi(struct irq_domain *domain) 592 { 593 return false; 594 } 595 596 static inline bool irq_domain_is_msi_remap(struct irq_domain *domain) 597 { 598 return false; 599 } 600 601 static inline bool 602 irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain) 603 { 604 return false; 605 } 606 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 607 608 #else /* CONFIG_IRQ_DOMAIN */ 609 static inline void irq_dispose_mapping(unsigned int virq) { } 610 static inline struct irq_domain *irq_find_matching_fwnode( 611 struct fwnode_handle *fwnode, enum irq_domain_bus_token bus_token) 612 { 613 return NULL; 614 } 615 static inline bool irq_domain_check_msi_remap(void) 616 { 617 return false; 618 } 619 #endif /* !CONFIG_IRQ_DOMAIN */ 620 621 #endif /* _LINUX_IRQDOMAIN_H */ 622