FILE
irqdomain.h
File preview with syntax highlighting.
linux-6.19.14/include/linux/irqdomain.h
1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * irq_domain - IRQ Translation Domains 4 * 5 * See Documentation/core-api/irq/irq-domain.rst for the details. 6 */ 7 8#ifndef _LINUX_IRQDOMAIN_H 9#define _LINUX_IRQDOMAIN_H 10 11#include <linux/types.h> 12#include <linux/irqdomain_defs.h> 13#include <linux/irqhandler.h> 14#include <linux/of.h> 15#include <linux/mutex.h> 16#include <linux/radix-tree.h> 17 18struct device_node; 19struct fwnode_handle; 20struct irq_domain; 21struct irq_chip; 22struct irq_data; 23struct irq_desc; 24struct cpumask; 25struct seq_file; 26struct irq_affinity_desc; 27struct msi_parent_ops; 28 29#define IRQ_DOMAIN_IRQ_SPEC_PARAMS 16 30 31/** 32 * struct irq_fwspec - generic IRQ specifier structure 33 * 34 * @fwnode: Pointer to a firmware-specific descriptor 35 * @param_count: Number of device-specific parameters 36 * @param: Device-specific parameters 37 * 38 * This structure, directly modeled after of_phandle_args, is used to 39 * pass a device-specific description of an interrupt. 40 */ 41struct irq_fwspec { 42 struct fwnode_handle *fwnode; 43 int param_count; 44 u32 param[IRQ_DOMAIN_IRQ_SPEC_PARAMS]; 45}; 46 47/** 48 * struct irq_fwspec_info - firmware provided IRQ information structure 49 * 50 * @flags: Information validity flags 51 * @affinity: Affinity mask for this interrupt 52 * 53 * This structure reports firmware-specific information about an 54 * interrupt. The only significant information is the affinity of a 55 * per-CPU interrupt, but this is designed to be extended as required. 56 */ 57struct irq_fwspec_info { 58 unsigned long flags; 59 const struct cpumask *affinity; 60}; 61 62#define IRQ_FWSPEC_INFO_AFFINITY_VALID BIT(0) 63 64/* Conversion function from of_phandle_args fields to fwspec */ 65void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args, 66 unsigned int count, struct irq_fwspec *fwspec); 67 68/** 69 * struct irq_domain_ops - Methods for irq_domain objects 70 * @match: Match an interrupt controller device node to a domain, returns 71 * 1 on a match 72 * @select: Match an interrupt controller fw specification. It is more generic 73 * than @match as it receives a complete struct irq_fwspec. Therefore, 74 * @select is preferred if provided. Returns 1 on a match. 75 * @map: Create or update a mapping between a virtual irq number and a hw 76 * irq number. This is called only once for a given mapping. 77 * @unmap: Dispose of such a mapping 78 * @xlate: Given a device tree node and interrupt specifier, decode 79 * the hardware irq number and linux irq type value. 80 * @alloc: Allocate @nr_irqs interrupts starting from @virq. 81 * @free: Free @nr_irqs interrupts starting from @virq. 82 * @activate: Activate one interrupt in HW (@irqd). If @reserve is set, only 83 * reserve the vector. If unset, assign the vector (called from 84 * request_irq()). 85 * @deactivate: Disarm one interrupt (@irqd). 86 * @translate: Given @fwspec, decode the hardware irq number (@out_hwirq) and 87 * linux irq type value (@out_type). This is a generalised @xlate 88 * (over struct irq_fwspec) and is preferred if provided. 89 * @get_fwspec_info: 90 * Given @fwspec, report additional firmware-provided information in 91 * @info. Optional. 92 * @debug_show: For domains to show specific data for an interrupt in debugfs. 93 * 94 * Functions below are provided by the driver and called whenever a new mapping 95 * is created or an old mapping is disposed. The driver can then proceed to 96 * whatever internal data structures management is required. It also needs 97 * to setup the irq_desc when returning from map(). 98 */ 99struct irq_domain_ops { 100 int (*match)(struct irq_domain *d, struct device_node *node, 101 enum irq_domain_bus_token bus_token); 102 int (*select)(struct irq_domain *d, struct irq_fwspec *fwspec, 103 enum irq_domain_bus_token bus_token); 104 int (*map)(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw); 105 void (*unmap)(struct irq_domain *d, unsigned int virq); 106 int (*xlate)(struct irq_domain *d, struct device_node *node, 107 const u32 *intspec, unsigned int intsize, 108 unsigned long *out_hwirq, unsigned int *out_type); 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 int (*activate)(struct irq_domain *d, struct irq_data *irqd, bool reserve); 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 int (*get_fwspec_info)(struct irq_fwspec *fwspec, struct irq_fwspec_info *info); 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 127extern const struct irq_domain_ops irq_generic_chip_ops; 128 129struct 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: Per irq_domain flags 139 * @mapcount: The number of mapped interrupts 140 * @mutex: Domain lock, hierarchical domains use root domain's lock 141 * @root: Pointer to root domain, or containing structure if non-hierarchical 142 * 143 * Optional elements: 144 * @fwnode: Pointer to firmware node associated with the irq_domain. Pretty easy 145 * to swap it for the of_node via the irq_domain_get_of_node accessor 146 * @bus_token: @fwnode's device_node might be used for several irq domains. But 147 * in connection with @bus_token, the pair shall be unique in a 148 * system. 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 * @dev: Pointer to the device which instantiated the irqdomain 153 * With per device irq domains this is not necessarily the same 154 * as @pm_dev. 155 * @pm_dev: Pointer to a device that can be utilized for power management 156 * purposes related to the irq domain. 157 * @parent: Pointer to parent irq_domain to support hierarchy irq_domains 158 * @msi_parent_ops: Pointer to MSI parent domain methods for per device domain init 159 * @exit: Function called when the domain is destroyed 160 * 161 * Revmap data, used internally by the irq domain code: 162 * @hwirq_max: Top limit for the HW irq number. Especially to avoid 163 * conflicts/failures with reserved HW irqs. Can be ~0. 164 * @revmap_size: Size of the linear map table @revmap 165 * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map 166 * @revmap: Linear table of irq_data pointers 167 */ 168struct irq_domain { 169 struct list_head link; 170 const char *name; 171 const struct irq_domain_ops *ops; 172 void *host_data; 173 unsigned int flags; 174 unsigned int mapcount; 175 struct mutex mutex; 176 struct irq_domain *root; 177 178 /* Optional data */ 179 struct fwnode_handle *fwnode; 180 enum irq_domain_bus_token bus_token; 181 struct irq_domain_chip_generic *gc; 182 struct device *dev; 183 struct device *pm_dev; 184#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 185 struct irq_domain *parent; 186#endif 187#ifdef CONFIG_GENERIC_MSI_IRQ 188 const struct msi_parent_ops *msi_parent_ops; 189#endif 190 void (*exit)(struct irq_domain *d); 191 192 /* reverse map data. The linear map gets appended to the irq_domain */ 193 irq_hw_number_t hwirq_max; 194 unsigned int revmap_size; 195 struct radix_tree_root revmap_tree; 196 struct irq_data __rcu *revmap[] __counted_by(revmap_size); 197}; 198 199/* Irq domain flags */ 200enum { 201 /* Irq domain is hierarchical */ 202 IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0), 203 204 /* Irq domain name was allocated internally */ 205 IRQ_DOMAIN_NAME_ALLOCATED = (1 << 1), 206 207 /* Irq domain is an IPI domain with virq per cpu */ 208 IRQ_DOMAIN_FLAG_IPI_PER_CPU = (1 << 2), 209 210 /* Irq domain is an IPI domain with single virq */ 211 IRQ_DOMAIN_FLAG_IPI_SINGLE = (1 << 3), 212 213 /* Irq domain implements MSIs */ 214 IRQ_DOMAIN_FLAG_MSI = (1 << 4), 215 216 /* 217 * Irq domain implements isolated MSI, see msi_device_has_isolated_msi() 218 */ 219 IRQ_DOMAIN_FLAG_ISOLATED_MSI = (1 << 5), 220 221 /* Irq domain doesn't translate anything */ 222 IRQ_DOMAIN_FLAG_NO_MAP = (1 << 6), 223 224 /* Irq domain is a MSI parent domain */ 225 IRQ_DOMAIN_FLAG_MSI_PARENT = (1 << 8), 226 227 /* Irq domain is a MSI device domain */ 228 IRQ_DOMAIN_FLAG_MSI_DEVICE = (1 << 9), 229 230 /* Irq domain must destroy generic chips when removed */ 231 IRQ_DOMAIN_FLAG_DESTROY_GC = (1 << 10), 232 233 /* Address and data pair is mutable when irq_set_affinity() */ 234 IRQ_DOMAIN_FLAG_MSI_IMMUTABLE = (1 << 11), 235 236 /* IRQ domain requires parent fwnode matching */ 237 IRQ_DOMAIN_FLAG_FWNODE_PARENT = (1 << 12), 238 239 /* 240 * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved 241 * for implementation specific purposes and ignored by the 242 * core code. 243 */ 244 IRQ_DOMAIN_FLAG_NONCORE = (1 << 16), 245}; 246 247static inline struct device_node *irq_domain_get_of_node(struct irq_domain *d) 248{ 249 return to_of_node(d->fwnode); 250} 251 252static inline void irq_domain_set_pm_device(struct irq_domain *d, struct device *dev) 253{ 254 if (d) 255 d->pm_dev = dev; 256} 257 258#ifdef CONFIG_IRQ_DOMAIN 259struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id, 260 const char *name, phys_addr_t *pa); 261 262enum { 263 IRQCHIP_FWNODE_REAL, 264 IRQCHIP_FWNODE_NAMED, 265 IRQCHIP_FWNODE_NAMED_ID, 266}; 267 268static inline struct fwnode_handle *irq_domain_alloc_named_fwnode(const char *name) 269{ 270 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED, 0, name, NULL); 271} 272 273static inline struct fwnode_handle *irq_domain_alloc_named_id_fwnode(const char *name, int id) 274{ 275 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED_ID, id, name, 276 NULL); 277} 278 279static inline struct fwnode_handle *irq_domain_alloc_fwnode(phys_addr_t *pa) 280{ 281 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_REAL, 0, NULL, pa); 282} 283 284void irq_domain_free_fwnode(struct fwnode_handle *fwnode); 285 286DEFINE_FREE(irq_domain_free_fwnode, struct fwnode_handle *, if (_T) irq_domain_free_fwnode(_T)) 287 288struct irq_domain_chip_generic_info; 289 290/** 291 * struct irq_domain_info - Domain information structure 292 * @fwnode: firmware node for the interrupt controller 293 * @domain_flags: Additional flags to add to the domain flags 294 * @size: Size of linear map; 0 for radix mapping only 295 * @hwirq_max: Maximum number of interrupts supported by controller 296 * @direct_max: Maximum value of direct maps; 297 * Use ~0 for no limit; 0 for no direct mapping 298 * @hwirq_base: The first hardware interrupt number (legacy domains only) 299 * @virq_base: The first Linux interrupt number for legacy domains to 300 * immediately associate the interrupts after domain creation 301 * @bus_token: Domain bus token 302 * @name_suffix: Optional name suffix to avoid collisions when multiple 303 * domains are added using same fwnode 304 * @ops: Domain operation callbacks 305 * @host_data: Controller private data pointer 306 * @dev: Device which creates the domain 307 * @dgc_info: Geneneric chip information structure pointer used to 308 * create generic chips for the domain if not NULL. 309 * @init: Function called when the domain is created. 310 * Allow to do some additional domain initialisation. 311 * @exit: Function called when the domain is destroyed. 312 * Allow to do some additional cleanup operation. 313 */ 314struct irq_domain_info { 315 struct fwnode_handle *fwnode; 316 unsigned int domain_flags; 317 unsigned int size; 318 irq_hw_number_t hwirq_max; 319 int direct_max; 320 unsigned int hwirq_base; 321 unsigned int virq_base; 322 enum irq_domain_bus_token bus_token; 323 const char *name_suffix; 324 const struct irq_domain_ops *ops; 325 void *host_data; 326 struct device *dev; 327#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 328 /** 329 * @parent: Pointer to the parent irq domain used in a hierarchy domain 330 */ 331 struct irq_domain *parent; 332#endif 333 struct irq_domain_chip_generic_info *dgc_info; 334 int (*init)(struct irq_domain *d); 335 void (*exit)(struct irq_domain *d); 336}; 337 338struct irq_domain *irq_domain_instantiate(const struct irq_domain_info *info); 339struct irq_domain *devm_irq_domain_instantiate(struct device *dev, 340 const struct irq_domain_info *info); 341 342struct irq_domain *irq_domain_create_simple(struct fwnode_handle *fwnode, unsigned int size, 343 unsigned int first_irq, 344 const struct irq_domain_ops *ops, void *host_data); 345struct irq_domain *irq_domain_create_legacy(struct fwnode_handle *fwnode, unsigned int size, 346 unsigned int first_irq, irq_hw_number_t first_hwirq, 347 const struct irq_domain_ops *ops, void *host_data); 348struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec, 349 enum irq_domain_bus_token bus_token); 350void irq_set_default_domain(struct irq_domain *domain); 351struct irq_domain *irq_get_default_domain(void); 352int irq_domain_alloc_descs(int virq, unsigned int nr_irqs, irq_hw_number_t hwirq, int node, 353 const struct irq_affinity_desc *affinity); 354 355extern const struct fwnode_operations irqchip_fwnode_ops; 356 357static inline bool is_fwnode_irqchip(const struct fwnode_handle *fwnode) 358{ 359 return fwnode && fwnode->ops == &irqchip_fwnode_ops; 360} 361 362void irq_domain_update_bus_token(struct irq_domain *domain, enum irq_domain_bus_token bus_token); 363 364static inline struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, 365 enum irq_domain_bus_token bus_token) 366{ 367 struct irq_fwspec fwspec = { 368 .fwnode = fwnode, 369 }; 370 371 return irq_find_matching_fwspec(&fwspec, bus_token); 372} 373 374static inline struct irq_domain *irq_find_matching_host(struct device_node *node, 375 enum irq_domain_bus_token bus_token) 376{ 377 return irq_find_matching_fwnode(of_fwnode_handle(node), bus_token); 378} 379 380static inline struct irq_domain *irq_find_host(struct device_node *node) 381{ 382 struct irq_domain *d; 383 384 d = irq_find_matching_host(node, DOMAIN_BUS_WIRED); 385 if (!d) 386 d = irq_find_matching_host(node, DOMAIN_BUS_ANY); 387 388 return d; 389} 390 391#ifdef CONFIG_IRQ_DOMAIN_NOMAP 392static inline struct irq_domain *irq_domain_create_nomap(struct fwnode_handle *fwnode, 393 unsigned int max_irq, 394 const struct irq_domain_ops *ops, 395 void *host_data) 396{ 397 const struct irq_domain_info info = { 398 .fwnode = fwnode, 399 .hwirq_max = max_irq, 400 .direct_max = max_irq, 401 .ops = ops, 402 .host_data = host_data, 403 }; 404 struct irq_domain *d = irq_domain_instantiate(&info); 405 406 return IS_ERR(d) ? NULL : d; 407} 408 409unsigned int irq_create_direct_mapping(struct irq_domain *domain); 410#endif 411 412/** 413 * irq_domain_create_linear - Allocate and register a linear revmap irq_domain. 414 * @fwnode: pointer to interrupt controller's FW node. 415 * @size: Number of interrupts in the domain. 416 * @ops: map/unmap domain callbacks 417 * @host_data: Controller private data pointer 418 * 419 * Returns: Newly created irq_domain 420 */ 421static inline struct irq_domain *irq_domain_create_linear(struct fwnode_handle *fwnode, 422 unsigned int size, 423 const struct irq_domain_ops *ops, 424 void *host_data) 425{ 426 const struct irq_domain_info info = { 427 .fwnode = fwnode, 428 .size = size, 429 .hwirq_max = size, 430 .ops = ops, 431 .host_data = host_data, 432 }; 433 struct irq_domain *d = irq_domain_instantiate(&info); 434 435 return IS_ERR(d) ? NULL : d; 436} 437 438static inline struct irq_domain *irq_domain_create_tree(struct fwnode_handle *fwnode, 439 const struct irq_domain_ops *ops, 440 void *host_data) 441{ 442 const struct irq_domain_info info = { 443 .fwnode = fwnode, 444 .hwirq_max = ~0, 445 .ops = ops, 446 .host_data = host_data, 447 }; 448 struct irq_domain *d = irq_domain_instantiate(&info); 449 450 return IS_ERR(d) ? NULL : d; 451} 452 453void irq_domain_remove(struct irq_domain *domain); 454 455int irq_domain_associate(struct irq_domain *domain, unsigned int irq, irq_hw_number_t hwirq); 456void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base, 457 irq_hw_number_t hwirq_base, int count); 458 459unsigned int irq_create_mapping_affinity(struct irq_domain *domain, irq_hw_number_t hwirq, 460 const struct irq_affinity_desc *affinity); 461unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec); 462void irq_dispose_mapping(unsigned int virq); 463 464/** 465 * irq_create_mapping - Map a hardware interrupt into linux irq space 466 * @domain: domain owning this hardware interrupt or NULL for default domain 467 * @hwirq: hardware irq number in that domain space 468 * 469 * Only one mapping per hardware interrupt is permitted. 470 * 471 * If the sense/trigger is to be specified, set_irq_type() should be called 472 * on the number returned from that call. 473 * 474 * Returns: Linux irq number or 0 on error 475 */ 476static inline unsigned int irq_create_mapping(struct irq_domain *domain, irq_hw_number_t hwirq) 477{ 478 return irq_create_mapping_affinity(domain, hwirq, NULL); 479} 480 481struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain, 482 irq_hw_number_t hwirq, 483 unsigned int *irq); 484 485/** 486 * irq_resolve_mapping - Find a linux irq from a hw irq number. 487 * @domain: domain owning this hardware interrupt 488 * @hwirq: hardware irq number in that domain space 489 * 490 * Returns: Interrupt descriptor 491 */ 492static inline struct irq_desc *irq_resolve_mapping(struct irq_domain *domain, 493 irq_hw_number_t hwirq) 494{ 495 return __irq_resolve_mapping(domain, hwirq, NULL); 496} 497 498/** 499 * irq_find_mapping() - Find a linux irq from a hw irq number. 500 * @domain: domain owning this hardware interrupt 501 * @hwirq: hardware irq number in that domain space 502 * 503 * Returns: Linux irq number or 0 if not found 504 */ 505static inline unsigned int irq_find_mapping(struct irq_domain *domain, 506 irq_hw_number_t hwirq) 507{ 508 unsigned int irq; 509 510 if (__irq_resolve_mapping(domain, hwirq, &irq)) 511 return irq; 512 513 return 0; 514} 515 516extern const struct irq_domain_ops irq_domain_simple_ops; 517 518/* stock xlate functions */ 519int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr, 520 const u32 *intspec, unsigned int intsize, 521 irq_hw_number_t *out_hwirq, unsigned int *out_type); 522int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr, 523 const u32 *intspec, unsigned int intsize, 524 irq_hw_number_t *out_hwirq, unsigned int *out_type); 525int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr, 526 const u32 *intspec, unsigned int intsize, 527 irq_hw_number_t *out_hwirq, unsigned int *out_type); 528int irq_domain_xlate_twothreecell(struct irq_domain *d, struct device_node *ctrlr, 529 const u32 *intspec, unsigned int intsize, 530 irq_hw_number_t *out_hwirq, unsigned int *out_type); 531 532int irq_domain_translate_onecell(struct irq_domain *d, struct irq_fwspec *fwspec, 533 unsigned long *out_hwirq, unsigned int *out_type); 534int irq_domain_translate_twocell(struct irq_domain *d, struct irq_fwspec *fwspec, 535 unsigned long *out_hwirq, unsigned int *out_type); 536int irq_domain_translate_twothreecell(struct irq_domain *d, struct irq_fwspec *fwspec, 537 unsigned long *out_hwirq, unsigned int *out_type); 538 539/* IPI functions */ 540int irq_reserve_ipi(struct irq_domain *domain, const struct cpumask *dest); 541int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest); 542 543/* V2 interfaces to support hierarchy IRQ domains. */ 544struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, unsigned int virq); 545void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, irq_hw_number_t hwirq, 546 const struct irq_chip *chip, void *chip_data, irq_flow_handler_t handler, 547 void *handler_data, const char *handler_name); 548void irq_domain_reset_irq_data(struct irq_data *irq_data); 549#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 550/** 551 * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy 552 * @parent: Parent irq domain to associate with the new domain 553 * @flags: Irq domain flags associated to the domain 554 * @size: Size of the domain. See below 555 * @fwnode: Optional fwnode of the interrupt controller 556 * @ops: Pointer to the interrupt domain callbacks 557 * @host_data: Controller private data pointer 558 * 559 * If @size is 0 a tree domain is created, otherwise a linear domain. 560 * 561 * If successful the parent is associated to the new domain and the 562 * domain flags are set. 563 * 564 * Returns: A pointer to IRQ domain, or %NULL on failure. 565 */ 566static inline struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent, 567 unsigned int flags, unsigned int size, 568 struct fwnode_handle *fwnode, 569 const struct irq_domain_ops *ops, 570 void *host_data) 571{ 572 const struct irq_domain_info info = { 573 .fwnode = fwnode, 574 .size = size, 575 .hwirq_max = size ? : ~0U, 576 .ops = ops, 577 .host_data = host_data, 578 .domain_flags = flags, 579 .parent = parent, 580 }; 581 struct irq_domain *d = irq_domain_instantiate(&info); 582 583 return IS_ERR(d) ? NULL : d; 584} 585 586int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, unsigned int nr_irqs, 587 int node, void *arg, bool realloc, 588 const struct irq_affinity_desc *affinity); 589void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs); 590int irq_domain_activate_irq(struct irq_data *irq_data, bool early); 591void irq_domain_deactivate_irq(struct irq_data *irq_data); 592 593/** 594 * irq_domain_alloc_irqs - Allocate IRQs from domain 595 * @domain: domain to allocate from 596 * @nr_irqs: number of IRQs to allocate 597 * @node: NUMA node id for memory allocation 598 * @arg: domain specific argument 599 * 600 * See __irq_domain_alloc_irqs()' documentation. 601 */ 602static inline int irq_domain_alloc_irqs(struct irq_domain *domain, unsigned int nr_irqs, 603 int node, void *arg) 604{ 605 return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false, NULL); 606} 607 608int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq, 609 irq_hw_number_t hwirq, const struct irq_chip *chip, 610 void *chip_data); 611void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq, 612 unsigned int nr_irqs); 613void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs); 614 615int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg); 616int irq_domain_pop_irq(struct irq_domain *domain, int virq); 617 618int irq_domain_alloc_irqs_parent(struct irq_domain *domain, unsigned int irq_base, 619 unsigned int nr_irqs, void *arg); 620 621void irq_domain_free_irqs_parent(struct irq_domain *domain, unsigned int irq_base, 622 unsigned int nr_irqs); 623 624int irq_domain_disconnect_hierarchy(struct irq_domain *domain, unsigned int virq); 625 626int irq_populate_fwspec_info(struct irq_fwspec *fwspec, struct irq_fwspec_info *info); 627 628static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) 629{ 630 return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY; 631} 632 633static inline bool irq_domain_is_ipi(struct irq_domain *domain) 634{ 635 return domain->flags & (IRQ_DOMAIN_FLAG_IPI_PER_CPU | IRQ_DOMAIN_FLAG_IPI_SINGLE); 636} 637 638static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain) 639{ 640 return domain->flags & IRQ_DOMAIN_FLAG_IPI_PER_CPU; 641} 642 643static inline bool irq_domain_is_ipi_single(struct irq_domain *domain) 644{ 645 return domain->flags & IRQ_DOMAIN_FLAG_IPI_SINGLE; 646} 647 648static inline bool irq_domain_is_msi(struct irq_domain *domain) 649{ 650 return domain->flags & IRQ_DOMAIN_FLAG_MSI; 651} 652 653static inline bool irq_domain_is_msi_parent(struct irq_domain *domain) 654{ 655 return domain->flags & IRQ_DOMAIN_FLAG_MSI_PARENT; 656} 657 658static inline bool irq_domain_is_msi_device(struct irq_domain *domain) 659{ 660 return domain->flags & IRQ_DOMAIN_FLAG_MSI_DEVICE; 661} 662 663static inline bool irq_domain_is_msi_immutable(struct irq_domain *domain) 664{ 665 return domain->flags & IRQ_DOMAIN_FLAG_MSI_IMMUTABLE; 666} 667#else /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 668static inline int irq_domain_alloc_irqs(struct irq_domain *domain, unsigned int nr_irqs, 669 int node, void *arg) 670{ 671 return -1; 672} 673 674static inline void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs) { } 675 676static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) 677{ 678 return false; 679} 680 681static inline bool irq_domain_is_ipi(struct irq_domain *domain) 682{ 683 return false; 684} 685 686static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain) 687{ 688 return false; 689} 690 691static inline bool irq_domain_is_ipi_single(struct irq_domain *domain) 692{ 693 return false; 694} 695 696static inline bool irq_domain_is_msi(struct irq_domain *domain) 697{ 698 return false; 699} 700 701static inline bool irq_domain_is_msi_parent(struct irq_domain *domain) 702{ 703 return false; 704} 705 706static inline bool irq_domain_is_msi_device(struct irq_domain *domain) 707{ 708 return false; 709} 710 711static inline int irq_populate_fwspec_info(struct irq_fwspec *fwspec, struct irq_fwspec_info *info) 712{ 713 return -EINVAL; 714} 715#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 716 717#ifdef CONFIG_GENERIC_MSI_IRQ 718int msi_device_domain_alloc_wired(struct irq_domain *domain, unsigned int hwirq, unsigned int type); 719void msi_device_domain_free_wired(struct irq_domain *domain, unsigned int virq); 720#else 721static inline int msi_device_domain_alloc_wired(struct irq_domain *domain, unsigned int hwirq, 722 unsigned int type) 723{ 724 WARN_ON_ONCE(1); 725 return -EINVAL; 726} 727static inline void msi_device_domain_free_wired(struct irq_domain *domain, unsigned int virq) 728{ 729 WARN_ON_ONCE(1); 730} 731#endif 732 733static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_node, 734 unsigned int size, 735 const struct irq_domain_ops *ops, 736 void *host_data) 737{ 738 struct irq_domain_info info = { 739 .fwnode = of_fwnode_handle(of_node), 740 .size = size, 741 .hwirq_max = size, 742 .ops = ops, 743 .host_data = host_data, 744 }; 745 struct irq_domain *d; 746 747 d = irq_domain_instantiate(&info); 748 return IS_ERR(d) ? NULL : d; 749} 750 751#else /* CONFIG_IRQ_DOMAIN */ 752static inline void irq_dispose_mapping(unsigned int virq) { } 753static inline struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, 754 enum irq_domain_bus_token bus_token) 755{ 756 return NULL; 757} 758#endif /* !CONFIG_IRQ_DOMAIN */ 759 760#endif /* _LINUX_IRQDOMAIN_H */
~/
Read-only file preview.