include/linux/irqdomain.h

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