include/linux/irqdomain.h

   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 irq_domain;
  41 struct of_device_id;
  42 struct irq_chip;
  43 struct irq_data;
  44 struct cpumask;
  45 struct seq_file;
  46
  47 /* Number of irqs reserved for a legacy isa controller */
  48 #define NUM_ISA_INTERRUPTS      16
  49
  50 #define IRQ_DOMAIN_IRQ_SPEC_PARAMS 16
  51
  52 /**
  53  * struct irq_fwspec - generic IRQ specifier structure
  54  *
  55  * @fwnode:             Pointer to a firmware-specific descriptor
  56  * @param_count:        Number of device-specific parameters
  57  * @param:              Device-specific parameters
  58  *
  59  * This structure, directly modeled after of_phandle_args, is used to
  60  * pass a device-specific description of an interrupt.
  61  */
  62 struct irq_fwspec {
  63         struct fwnode_handle *fwnode;
  64         int param_count;
  65         u32 param[IRQ_DOMAIN_IRQ_SPEC_PARAMS];
  66 };
  67
  68 /*
  69  * Should several domains have the same device node, but serve
  70  * different purposes (for example one domain is for PCI/MSI, and the
  71  * other for wired IRQs), they can be distinguished using a
  72  * bus-specific token. Most domains are expected to only carry
  73  * DOMAIN_BUS_ANY.
  74  */
  75 enum irq_domain_bus_token {
  76         DOMAIN_BUS_ANY          = 0,
  77         DOMAIN_BUS_WIRED,
  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 };
  84
  85 /**
  86  * struct irq_domain_ops - Methods for irq_domain objects
  87  * @match: Match an interrupt controller device node to a host, returns
  88  *         1 on a match
  89  * @map: Create or update a mapping between a virtual irq number and a hw
  90  *       irq number. This is called only once for a given mapping.
  91  * @unmap: Dispose of such a mapping
  92  * @xlate: Given a device tree node and interrupt specifier, decode
  93  *         the hardware irq number and linux irq type value.
  94  *
  95  * Functions below are provided by the driver and called whenever a new mapping
  96  * is created or an old mapping is disposed. The driver can then proceed to
  97  * whatever internal data structures management is required. It also needs
  98  * to setup the irq_desc when returning from map().
  99  */
 100 struct irq_domain_ops {
 101         int (*match)(struct irq_domain *d, struct device_node *node,
 102                      enum irq_domain_bus_token bus_token);
 103         int (*select)(struct irq_domain *d, struct irq_fwspec *fwspec,
 104                       enum irq_domain_bus_token bus_token);
 105         int (*map)(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw);
 106         void (*unmap)(struct irq_domain *d, unsigned int virq);
 107         int (*xlate)(struct irq_domain *d, struct device_node *node,
 108                      const u32 *intspec, unsigned int intsize,
 109                      unsigned long *out_hwirq, unsigned int *out_type);
 110 #ifdef  CONFIG_IRQ_DOMAIN_HIERARCHY
 111         /* extended V2 interfaces to support hierarchy irq_domains */
 112         int (*alloc)(struct irq_domain *d, unsigned int virq,
 113                      unsigned int nr_irqs, void *arg);
 114         void (*free)(struct irq_domain *d, unsigned int virq,
 115                      unsigned int nr_irqs);
 116         int (*activate)(struct irq_domain *d, struct irq_data *irqd, bool reserve);
 117         void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data);
 118         int (*translate)(struct irq_domain *d, struct irq_fwspec *fwspec,
 119                          unsigned long *out_hwirq, unsigned int *out_type);
 120 #endif
 121 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
 122         void (*debug_show)(struct seq_file *m, struct irq_domain *d,
 123                            struct irq_data *irqd, int ind);
 124 #endif
 125 };
 126
 127 extern struct irq_domain_ops irq_generic_chip_ops;
 128
 129 struct irq_domain_chip_generic;
 130
 131 /**
 132  * struct irq_domain - Hardware interrupt number translation object
 133  * @link: Element in global irq_domain list.
 134  * @name: Name of interrupt domain
 135  * @ops: pointer to irq_domain methods
 136  * @host_data: private data pointer for use by owner.  Not touched by irq_domain
 137  *             core code.
 138  * @flags: host per irq_domain flags
 139  * @mapcount: The number of mapped interrupts
 140  *
 141  * Optional elements
 142  * @fwnode: Pointer to firmware node associated with the irq_domain. Pretty easy
 143  *          to swap it for the of_node via the irq_domain_get_of_node accessor
 144  * @gc: Pointer to a list of generic chips. There is a helper function for
 145  *      setting up one or more generic chips for interrupt controllers
 146  *      drivers using the generic chip library which uses this pointer.
 147  * @parent: Pointer to parent irq_domain to support hierarchy irq_domains
 148  * @debugfs_file: dentry for the domain debugfs file
 149  *
 150  * Revmap data, used internally by irq_domain
 151  * @revmap_direct_max_irq: The largest hwirq that can be set for controllers that
 152  *                         support direct mapping
 153  * @revmap_size: Size of the linear map table @linear_revmap[]
 154  * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map
 155  * @linear_revmap: Linear table of hwirq->virq reverse mappings
 156  */
 157 struct irq_domain {
 158         struct list_head link;
 159         const char *name;
 160         const struct irq_domain_ops *ops;
 161         void *host_data;
 162         unsigned int flags;
 163         unsigned int mapcount;
 164
 165         /* Optional data */
 166         struct fwnode_handle *fwnode;
 167         enum irq_domain_bus_token bus_token;
 168         struct irq_domain_chip_generic *gc;
 169 #ifdef  CONFIG_IRQ_DOMAIN_HIERARCHY
 170         struct irq_domain *parent;
 171 #endif
 172 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
 173         struct dentry           *debugfs_file;
 174 #endif
 175
 176         /* reverse map data. The linear map gets appended to the irq_domain */
 177         irq_hw_number_t hwirq_max;
 178         unsigned int revmap_direct_max_irq;
 179         unsigned int revmap_size;
 180         struct radix_tree_root revmap_tree;
 181         struct mutex revmap_tree_mutex;
 182         unsigned int linear_revmap[];
 183 };
 184
 185 /* Irq domain flags */
 186 enum {
 187         /* Irq domain is hierarchical */
 188         IRQ_DOMAIN_FLAG_HIERARCHY       = (1 << 0),
 189
 190         /* Irq domain name was allocated in __irq_domain_add() */
 191         IRQ_DOMAIN_NAME_ALLOCATED       = (1 << 6),
 192
 193         /* Irq domain is an IPI domain with virq per cpu */
 194         IRQ_DOMAIN_FLAG_IPI_PER_CPU     = (1 << 2),
 195
 196         /* Irq domain is an IPI domain with single virq */
 197         IRQ_DOMAIN_FLAG_IPI_SINGLE      = (1 << 3),
 198
 199         /* Irq domain implements MSIs */
 200         IRQ_DOMAIN_FLAG_MSI             = (1 << 4),
 201
 202         /* Irq domain implements MSI remapping */
 203         IRQ_DOMAIN_FLAG_MSI_REMAP       = (1 << 5),
 204
 205         /*
 206          * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved
 207          * for implementation specific purposes and ignored by the
 208          * core code.
 209          */
 210         IRQ_DOMAIN_FLAG_NONCORE         = (1 << 16),
 211 };
 212
 213 static inline struct device_node *irq_domain_get_of_node(struct irq_domain *d)
 214 {
 215         return to_of_node(d->fwnode);
 216 }
 217
 218 #ifdef CONFIG_IRQ_DOMAIN
 219 struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
 220                                                 const char *name, void *data);
 221
 222 enum {
 223         IRQCHIP_FWNODE_REAL,
 224         IRQCHIP_FWNODE_NAMED,
 225         IRQCHIP_FWNODE_NAMED_ID,
 226 };
 227
 228 static inline
 229 struct fwnode_handle *irq_domain_alloc_named_fwnode(const char *name)
 230 {
 231         return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED, 0, name, NULL);
 232 }
 233
 234 static inline
 235 struct fwnode_handle *irq_domain_alloc_named_id_fwnode(const char *name, int id)
 236 {
 237         return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED_ID, id, name,
 238                                          NULL);
 239 }
 240
 241 static inline struct fwnode_handle *irq_domain_alloc_fwnode(void *data)
 242 {
 243         return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_REAL, 0, NULL, data);
 244 }
 245
 246 void irq_domain_free_fwnode(struct fwnode_handle *fwnode);
 247 struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
 248                                     irq_hw_number_t hwirq_max, int direct_max,
 249                                     const struct irq_domain_ops *ops,
 250                                     void *host_data);
 251 struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
 252                                          unsigned int size,
 253                                          unsigned int first_irq,
 254                                          const struct irq_domain_ops *ops,
 255                                          void *host_data);
 256 struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
 257                                          unsigned int size,
 258                                          unsigned int first_irq,
 259                                          irq_hw_number_t first_hwirq,
 260                                          const struct irq_domain_ops *ops,
 261                                          void *host_data);
 262 extern struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
 263                                                    enum irq_domain_bus_token bus_token);
 264 extern bool irq_domain_check_msi_remap(void);
 265 extern void irq_set_default_host(struct irq_domain *host);
 266 extern int irq_domain_alloc_descs(int virq, unsigned int nr_irqs,
 267                                   irq_hw_number_t hwirq, int node,
 268                                   const struct cpumask *affinity);
 269
 270 static inline struct fwnode_handle *of_node_to_fwnode(struct device_node *node)
 271 {
 272         return node ? &node->fwnode : NULL;
 273 }
 274
 275 extern const struct fwnode_operations irqchip_fwnode_ops;
 276
 277 static inline bool is_fwnode_irqchip(struct fwnode_handle *fwnode)
 278 {
 279         return fwnode && fwnode->ops == &irqchip_fwnode_ops;
 280 }
 281
 282 extern void irq_domain_update_bus_token(struct irq_domain *domain,
 283                                         enum irq_domain_bus_token bus_token);
 284
 285 static inline
 286 struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode,
 287                                             enum irq_domain_bus_token bus_token)
 288 {
 289         struct irq_fwspec fwspec = {
 290                 .fwnode = fwnode,
 291         };
 292
 293         return irq_find_matching_fwspec(&fwspec, bus_token);
 294 }
 295
 296 static inline struct irq_domain *irq_find_matching_host(struct device_node *node,
 297                                                         enum irq_domain_bus_token bus_token)
 298 {
 299         return irq_find_matching_fwnode(of_node_to_fwnode(node), bus_token);
 300 }
 301
 302 static inline struct irq_domain *irq_find_host(struct device_node *node)
 303 {
 304         return irq_find_matching_host(node, DOMAIN_BUS_ANY);
 305 }
 306
 307 /**
 308  * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain.
 309  * @of_node: pointer to interrupt controller's device tree node.
 310  * @size: Number of interrupts in the domain.
 311  * @ops: map/unmap domain callbacks
 312  * @host_data: Controller private data pointer
 313  */
 314 static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_node,
 315                                          unsigned int size,
 316                                          const struct irq_domain_ops *ops,
 317                                          void *host_data)
 318 {
 319         return __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data);
 320 }
 321 static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_node,
 322                                          unsigned int max_irq,
 323                                          const struct irq_domain_ops *ops,
 324                                          void *host_data)
 325 {
 326         return __irq_domain_add(of_node_to_fwnode(of_node), 0, max_irq, max_irq, ops, host_data);
 327 }
 328 static inline struct irq_domain *irq_domain_add_legacy_isa(
 329                                 struct device_node *of_node,
 330                                 const struct irq_domain_ops *ops,
 331                                 void *host_data)
 332 {
 333         return irq_domain_add_legacy(of_node, NUM_ISA_INTERRUPTS, 0, 0, ops,
 334                                      host_data);
 335 }
 336 static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node,
 337                                          const struct irq_domain_ops *ops,
 338                                          void *host_data)
 339 {
 340         return __irq_domain_add(of_node_to_fwnode(of_node), 0, ~0, 0, ops, host_data);
 341 }
 342
 343 static inline struct irq_domain *irq_domain_create_linear(struct fwnode_handle *fwnode,
 344                                          unsigned int size,
 345                                          const struct irq_domain_ops *ops,
 346                                          void *host_data)
 347 {
 348         return __irq_domain_add(fwnode, size, size, 0, ops, host_data);
 349 }
 350
 351 static inline struct irq_domain *irq_domain_create_tree(struct fwnode_handle *fwnode,
 352                                          const struct irq_domain_ops *ops,
 353                                          void *host_data)
 354 {
 355         return __irq_domain_add(fwnode, 0, ~0, 0, ops, host_data);
 356 }
 357
 358 extern void irq_domain_remove(struct irq_domain *host);
 359
 360 extern int irq_domain_associate(struct irq_domain *domain, unsigned int irq,
 361                                         irq_hw_number_t hwirq);
 362 extern void irq_domain_associate_many(struct irq_domain *domain,
 363                                       unsigned int irq_base,
 364                                       irq_hw_number_t hwirq_base, int count);
 365 extern void irq_domain_disassociate(struct irq_domain *domain,
 366                                     unsigned int irq);
 367
 368 extern unsigned int irq_create_mapping(struct irq_domain *host,
 369                                        irq_hw_number_t hwirq);
 370 extern unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec);
 371 extern void irq_dispose_mapping(unsigned int virq);
 372
 373 /**
 374  * irq_linear_revmap() - Find a linux irq from a hw irq number.
 375  * @domain: domain owning this hardware interrupt
 376  * @hwirq: hardware irq number in that domain space
 377  *
 378  * This is a fast path alternative to irq_find_mapping() that can be
 379  * called directly by irq controller code to save a handful of
 380  * instructions. It is always safe to call, but won't find irqs mapped
 381  * using the radix tree.
 382  */
 383 static inline unsigned int irq_linear_revmap(struct irq_domain *domain,
 384                                              irq_hw_number_t hwirq)
 385 {
 386         return hwirq < domain->revmap_size ? domain->linear_revmap[hwirq] : 0;
 387 }
 388 extern unsigned int irq_find_mapping(struct irq_domain *host,
 389                                      irq_hw_number_t hwirq);
 390 extern unsigned int irq_create_direct_mapping(struct irq_domain *host);
 391 extern int irq_create_strict_mappings(struct irq_domain *domain,
 392                                       unsigned int irq_base,
 393                                       irq_hw_number_t hwirq_base, int count);
 394
 395 static inline int irq_create_identity_mapping(struct irq_domain *host,
 396                                               irq_hw_number_t hwirq)
 397 {
 398         return irq_create_strict_mappings(host, hwirq, hwirq, 1);
 399 }
 400
 401 extern const struct irq_domain_ops irq_domain_simple_ops;
 402
 403 /* stock xlate functions */
 404 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
 405                         const u32 *intspec, unsigned int intsize,
 406                         irq_hw_number_t *out_hwirq, unsigned int *out_type);
 407 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
 408                         const u32 *intspec, unsigned int intsize,
 409                         irq_hw_number_t *out_hwirq, unsigned int *out_type);
 410 int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr,
 411                         const u32 *intspec, unsigned int intsize,
 412                         irq_hw_number_t *out_hwirq, unsigned int *out_type);
 413
 414 /* IPI functions */
 415 int irq_reserve_ipi(struct irq_domain *domain, const struct cpumask *dest);
 416 int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest);
 417
 418 /* V2 interfaces to support hierarchy IRQ domains. */
 419 extern struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
 420                                                 unsigned int virq);
 421 extern void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
 422                                 irq_hw_number_t hwirq, struct irq_chip *chip,
 423                                 void *chip_data, irq_flow_handler_t handler,
 424                                 void *handler_data, const char *handler_name);
 425 #ifdef  CONFIG_IRQ_DOMAIN_HIERARCHY
 426 extern struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
 427                         unsigned int flags, unsigned int size,
 428                         struct fwnode_handle *fwnode,
 429                         const struct irq_domain_ops *ops, void *host_data);
 430
 431 static inline struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *parent,
 432                                             unsigned int flags,
 433                                             unsigned int size,
 434                                             struct device_node *node,
 435                                             const struct irq_domain_ops *ops,
 436                                             void *host_data)
 437 {
 438         return irq_domain_create_hierarchy(parent, flags, size,
 439                                            of_node_to_fwnode(node),
 440                                            ops, host_data);
 441 }
 442
 443 extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
 444                                    unsigned int nr_irqs, int node, void *arg,
 445                                    bool realloc, const struct cpumask *affinity);
 446 extern void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs);
 447 extern int irq_domain_activate_irq(struct irq_data *irq_data, bool early);
 448 extern void irq_domain_deactivate_irq(struct irq_data *irq_data);
 449
 450 static inline int irq_domain_alloc_irqs(struct irq_domain *domain,
 451                         unsigned int nr_irqs, int node, void *arg)
 452 {
 453         return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false,
 454                                        NULL);
 455 }
 456
 457 extern int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,
 458                                            unsigned int irq_base,
 459                                            unsigned int nr_irqs, void *arg);
 460 extern int irq_domain_set_hwirq_and_chip(struct irq_domain *domain,
 461                                          unsigned int virq,
 462                                          irq_hw_number_t hwirq,
 463                                          struct irq_chip *chip,
 464                                          void *chip_data);
 465 extern void irq_domain_reset_irq_data(struct irq_data *irq_data);
 466 extern void irq_domain_free_irqs_common(struct irq_domain *domain,
 467                                         unsigned int virq,
 468                                         unsigned int nr_irqs);
 469 extern void irq_domain_free_irqs_top(struct irq_domain *domain,
 470                                      unsigned int virq, unsigned int nr_irqs);
 471
 472 extern int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg);
 473 extern int irq_domain_pop_irq(struct irq_domain *domain, int virq);
 474
 475 extern int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
 476                                         unsigned int irq_base,
 477                                         unsigned int nr_irqs, void *arg);
 478
 479 extern void irq_domain_free_irqs_parent(struct irq_domain *domain,
 480                                         unsigned int irq_base,
 481                                         unsigned int nr_irqs);
 482
 483 static inline bool irq_domain_is_hierarchy(struct irq_domain *domain)
 484 {
 485         return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY;
 486 }
 487
 488 static inline bool irq_domain_is_ipi(struct irq_domain *domain)
 489 {
 490         return domain->flags &
 491                 (IRQ_DOMAIN_FLAG_IPI_PER_CPU | IRQ_DOMAIN_FLAG_IPI_SINGLE);
 492 }
 493
 494 static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain)
 495 {
 496         return domain->flags & IRQ_DOMAIN_FLAG_IPI_PER_CPU;
 497 }
 498
 499 static inline bool irq_domain_is_ipi_single(struct irq_domain *domain)
 500 {
 501         return domain->flags & IRQ_DOMAIN_FLAG_IPI_SINGLE;
 502 }
 503
 504 static inline bool irq_domain_is_msi(struct irq_domain *domain)
 505 {
 506         return domain->flags & IRQ_DOMAIN_FLAG_MSI;
 507 }
 508
 509 static inline bool irq_domain_is_msi_remap(struct irq_domain *domain)
 510 {
 511         return domain->flags & IRQ_DOMAIN_FLAG_MSI_REMAP;
 512 }
 513
 514 extern bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain);
 515
 516 #else   /* CONFIG_IRQ_DOMAIN_HIERARCHY */
 517 static inline int irq_domain_alloc_irqs(struct irq_domain *domain,
 518                         unsigned int nr_irqs, int node, void *arg)
 519 {
 520         return -1;
 521 }
 522
 523 static inline void irq_domain_free_irqs(unsigned int virq,
 524                                         unsigned int nr_irqs) { }
 525
 526 static inline bool irq_domain_is_hierarchy(struct irq_domain *domain)
 527 {
 528         return false;
 529 }
 530
 531 static inline bool irq_domain_is_ipi(struct irq_domain *domain)
 532 {
 533         return false;
 534 }
 535
 536 static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain)
 537 {
 538         return false;
 539 }
 540
 541 static inline bool irq_domain_is_ipi_single(struct irq_domain *domain)
 542 {
 543         return false;
 544 }
 545
 546 static inline bool irq_domain_is_msi(struct irq_domain *domain)
 547 {
 548         return false;
 549 }
 550
 551 static inline bool irq_domain_is_msi_remap(struct irq_domain *domain)
 552 {
 553         return false;
 554 }
 555
 556 static inline bool
 557 irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain)
 558 {
 559         return false;
 560 }
 561 #endif  /* CONFIG_IRQ_DOMAIN_HIERARCHY */
 562
 563 #else /* CONFIG_IRQ_DOMAIN */
 564 static inline void irq_dispose_mapping(unsigned int virq) { }
 565 static inline struct irq_domain *irq_find_matching_fwnode(
 566         struct fwnode_handle *fwnode, enum irq_domain_bus_token bus_token)
 567 {
 568         return NULL;
 569 }
 570 static inline bool irq_domain_check_msi_remap(void)
 571 {
 572         return false;
 573 }
 574 #endif /* !CONFIG_IRQ_DOMAIN */
 575
 576 #endif /* _LINUX_IRQDOMAIN_H */