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