1 #define pr_fmt(fmt) "irq: " fmt 2 3 #include <linux/debugfs.h> 4 #include <linux/hardirq.h> 5 #include <linux/interrupt.h> 6 #include <linux/irq.h> 7 #include <linux/irqdesc.h> 8 #include <linux/irqdomain.h> 9 #include <linux/module.h> 10 #include <linux/mutex.h> 11 #include <linux/of.h> 12 #include <linux/of_address.h> 13 #include <linux/of_irq.h> 14 #include <linux/topology.h> 15 #include <linux/seq_file.h> 16 #include <linux/slab.h> 17 #include <linux/smp.h> 18 #include <linux/fs.h> 19 20 static LIST_HEAD(irq_domain_list); 21 static DEFINE_MUTEX(irq_domain_mutex); 22 23 static DEFINE_MUTEX(revmap_trees_mutex); 24 static struct irq_domain *irq_default_domain; 25 26 static int irq_domain_alloc_descs(int virq, unsigned int nr_irqs, 27 irq_hw_number_t hwirq, int node); 28 static void irq_domain_check_hierarchy(struct irq_domain *domain); 29 30 struct irqchip_fwid { 31 struct fwnode_handle fwnode; 32 char *name; 33 void *data; 34 }; 35 36 /** 37 * irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for 38 * identifying an irq domain 39 * @data: optional user-provided data 40 * 41 * Allocate a struct device_node, and return a poiner to the embedded 42 * fwnode_handle (or NULL on failure). 43 */ 44 struct fwnode_handle *irq_domain_alloc_fwnode(void *data) 45 { 46 struct irqchip_fwid *fwid; 47 char *name; 48 49 fwid = kzalloc(sizeof(*fwid), GFP_KERNEL); 50 name = kasprintf(GFP_KERNEL, "irqchip@%p", data); 51 52 if (!fwid || !name) { 53 kfree(fwid); 54 kfree(name); 55 return NULL; 56 } 57 58 fwid->name = name; 59 fwid->data = data; 60 fwid->fwnode.type = FWNODE_IRQCHIP; 61 return &fwid->fwnode; 62 } 63 EXPORT_SYMBOL_GPL(irq_domain_alloc_fwnode); 64 65 /** 66 * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle 67 * 68 * Free a fwnode_handle allocated with irq_domain_alloc_fwnode. 69 */ 70 void irq_domain_free_fwnode(struct fwnode_handle *fwnode) 71 { 72 struct irqchip_fwid *fwid; 73 74 if (WARN_ON(!is_fwnode_irqchip(fwnode))) 75 return; 76 77 fwid = container_of(fwnode, struct irqchip_fwid, fwnode); 78 kfree(fwid->name); 79 kfree(fwid); 80 } 81 EXPORT_SYMBOL_GPL(irq_domain_free_fwnode); 82 83 /** 84 * __irq_domain_add() - Allocate a new irq_domain data structure 85 * @of_node: optional device-tree node of the interrupt controller 86 * @size: Size of linear map; 0 for radix mapping only 87 * @hwirq_max: Maximum number of interrupts supported by controller 88 * @direct_max: Maximum value of direct maps; Use ~0 for no limit; 0 for no 89 * direct mapping 90 * @ops: domain callbacks 91 * @host_data: Controller private data pointer 92 * 93 * Allocates and initialize and irq_domain structure. 94 * Returns pointer to IRQ domain, or NULL on failure. 95 */ 96 struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size, 97 irq_hw_number_t hwirq_max, int direct_max, 98 const struct irq_domain_ops *ops, 99 void *host_data) 100 { 101 struct irq_domain *domain; 102 struct device_node *of_node; 103 104 of_node = to_of_node(fwnode); 105 106 domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size), 107 GFP_KERNEL, of_node_to_nid(of_node)); 108 if (WARN_ON(!domain)) 109 return NULL; 110 111 of_node_get(of_node); 112 113 /* Fill structure */ 114 INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL); 115 domain->ops = ops; 116 domain->host_data = host_data; 117 domain->fwnode = fwnode; 118 domain->hwirq_max = hwirq_max; 119 domain->revmap_size = size; 120 domain->revmap_direct_max_irq = direct_max; 121 irq_domain_check_hierarchy(domain); 122 123 mutex_lock(&irq_domain_mutex); 124 list_add(&domain->link, &irq_domain_list); 125 mutex_unlock(&irq_domain_mutex); 126 127 pr_debug("Added domain %s\n", domain->name); 128 return domain; 129 } 130 EXPORT_SYMBOL_GPL(__irq_domain_add); 131 132 /** 133 * irq_domain_remove() - Remove an irq domain. 134 * @domain: domain to remove 135 * 136 * This routine is used to remove an irq domain. The caller must ensure 137 * that all mappings within the domain have been disposed of prior to 138 * use, depending on the revmap type. 139 */ 140 void irq_domain_remove(struct irq_domain *domain) 141 { 142 mutex_lock(&irq_domain_mutex); 143 144 /* 145 * radix_tree_delete() takes care of destroying the root 146 * node when all entries are removed. Shout if there are 147 * any mappings left. 148 */ 149 WARN_ON(domain->revmap_tree.height); 150 151 list_del(&domain->link); 152 153 /* 154 * If the going away domain is the default one, reset it. 155 */ 156 if (unlikely(irq_default_domain == domain)) 157 irq_set_default_host(NULL); 158 159 mutex_unlock(&irq_domain_mutex); 160 161 pr_debug("Removed domain %s\n", domain->name); 162 163 of_node_put(irq_domain_get_of_node(domain)); 164 kfree(domain); 165 } 166 EXPORT_SYMBOL_GPL(irq_domain_remove); 167 168 /** 169 * irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs 170 * @of_node: pointer to interrupt controller's device tree node. 171 * @size: total number of irqs in mapping 172 * @first_irq: first number of irq block assigned to the domain, 173 * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then 174 * pre-map all of the irqs in the domain to virqs starting at first_irq. 175 * @ops: domain callbacks 176 * @host_data: Controller private data pointer 177 * 178 * Allocates an irq_domain, and optionally if first_irq is positive then also 179 * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq. 180 * 181 * This is intended to implement the expected behaviour for most 182 * interrupt controllers. If device tree is used, then first_irq will be 0 and 183 * irqs get mapped dynamically on the fly. However, if the controller requires 184 * static virq assignments (non-DT boot) then it will set that up correctly. 185 */ 186 struct irq_domain *irq_domain_add_simple(struct device_node *of_node, 187 unsigned int size, 188 unsigned int first_irq, 189 const struct irq_domain_ops *ops, 190 void *host_data) 191 { 192 struct irq_domain *domain; 193 194 domain = __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data); 195 if (!domain) 196 return NULL; 197 198 if (first_irq > 0) { 199 if (IS_ENABLED(CONFIG_SPARSE_IRQ)) { 200 /* attempt to allocated irq_descs */ 201 int rc = irq_alloc_descs(first_irq, first_irq, size, 202 of_node_to_nid(of_node)); 203 if (rc < 0) 204 pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n", 205 first_irq); 206 } 207 irq_domain_associate_many(domain, first_irq, 0, size); 208 } 209 210 return domain; 211 } 212 EXPORT_SYMBOL_GPL(irq_domain_add_simple); 213 214 /** 215 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain. 216 * @of_node: pointer to interrupt controller's device tree node. 217 * @size: total number of irqs in legacy mapping 218 * @first_irq: first number of irq block assigned to the domain 219 * @first_hwirq: first hwirq number to use for the translation. Should normally 220 * be '0', but a positive integer can be used if the effective 221 * hwirqs numbering does not begin at zero. 222 * @ops: map/unmap domain callbacks 223 * @host_data: Controller private data pointer 224 * 225 * Note: the map() callback will be called before this function returns 226 * for all legacy interrupts except 0 (which is always the invalid irq for 227 * a legacy controller). 228 */ 229 struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, 230 unsigned int size, 231 unsigned int first_irq, 232 irq_hw_number_t first_hwirq, 233 const struct irq_domain_ops *ops, 234 void *host_data) 235 { 236 struct irq_domain *domain; 237 238 domain = __irq_domain_add(of_node_to_fwnode(of_node), first_hwirq + size, 239 first_hwirq + size, 0, ops, host_data); 240 if (domain) 241 irq_domain_associate_many(domain, first_irq, first_hwirq, size); 242 243 return domain; 244 } 245 EXPORT_SYMBOL_GPL(irq_domain_add_legacy); 246 247 /** 248 * irq_find_matching_fwnode() - Locates a domain for a given fwnode 249 * @fwnode: FW descriptor of the interrupt controller 250 * @bus_token: domain-specific data 251 */ 252 struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, 253 enum irq_domain_bus_token bus_token) 254 { 255 struct irq_domain *h, *found = NULL; 256 int rc; 257 258 /* We might want to match the legacy controller last since 259 * it might potentially be set to match all interrupts in 260 * the absence of a device node. This isn't a problem so far 261 * yet though... 262 * 263 * bus_token == DOMAIN_BUS_ANY matches any domain, any other 264 * values must generate an exact match for the domain to be 265 * selected. 266 */ 267 mutex_lock(&irq_domain_mutex); 268 list_for_each_entry(h, &irq_domain_list, link) { 269 if (h->ops->match) 270 rc = h->ops->match(h, to_of_node(fwnode), bus_token); 271 else 272 rc = ((fwnode != NULL) && (h->fwnode == fwnode) && 273 ((bus_token == DOMAIN_BUS_ANY) || 274 (h->bus_token == bus_token))); 275 276 if (rc) { 277 found = h; 278 break; 279 } 280 } 281 mutex_unlock(&irq_domain_mutex); 282 return found; 283 } 284 EXPORT_SYMBOL_GPL(irq_find_matching_fwnode); 285 286 /** 287 * irq_set_default_host() - Set a "default" irq domain 288 * @domain: default domain pointer 289 * 290 * For convenience, it's possible to set a "default" domain that will be used 291 * whenever NULL is passed to irq_create_mapping(). It makes life easier for 292 * platforms that want to manipulate a few hard coded interrupt numbers that 293 * aren't properly represented in the device-tree. 294 */ 295 void irq_set_default_host(struct irq_domain *domain) 296 { 297 pr_debug("Default domain set to @0x%p\n", domain); 298 299 irq_default_domain = domain; 300 } 301 EXPORT_SYMBOL_GPL(irq_set_default_host); 302 303 void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq) 304 { 305 struct irq_data *irq_data = irq_get_irq_data(irq); 306 irq_hw_number_t hwirq; 307 308 if (WARN(!irq_data || irq_data->domain != domain, 309 "virq%i doesn't exist; cannot disassociate\n", irq)) 310 return; 311 312 hwirq = irq_data->hwirq; 313 irq_set_status_flags(irq, IRQ_NOREQUEST); 314 315 /* remove chip and handler */ 316 irq_set_chip_and_handler(irq, NULL, NULL); 317 318 /* Make sure it's completed */ 319 synchronize_irq(irq); 320 321 /* Tell the PIC about it */ 322 if (domain->ops->unmap) 323 domain->ops->unmap(domain, irq); 324 smp_mb(); 325 326 irq_data->domain = NULL; 327 irq_data->hwirq = 0; 328 329 /* Clear reverse map for this hwirq */ 330 if (hwirq < domain->revmap_size) { 331 domain->linear_revmap[hwirq] = 0; 332 } else { 333 mutex_lock(&revmap_trees_mutex); 334 radix_tree_delete(&domain->revmap_tree, hwirq); 335 mutex_unlock(&revmap_trees_mutex); 336 } 337 } 338 339 int irq_domain_associate(struct irq_domain *domain, unsigned int virq, 340 irq_hw_number_t hwirq) 341 { 342 struct irq_data *irq_data = irq_get_irq_data(virq); 343 int ret; 344 345 if (WARN(hwirq >= domain->hwirq_max, 346 "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name)) 347 return -EINVAL; 348 if (WARN(!irq_data, "error: virq%i is not allocated", virq)) 349 return -EINVAL; 350 if (WARN(irq_data->domain, "error: virq%i is already associated", virq)) 351 return -EINVAL; 352 353 mutex_lock(&irq_domain_mutex); 354 irq_data->hwirq = hwirq; 355 irq_data->domain = domain; 356 if (domain->ops->map) { 357 ret = domain->ops->map(domain, virq, hwirq); 358 if (ret != 0) { 359 /* 360 * If map() returns -EPERM, this interrupt is protected 361 * by the firmware or some other service and shall not 362 * be mapped. Don't bother telling the user about it. 363 */ 364 if (ret != -EPERM) { 365 pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n", 366 domain->name, hwirq, virq, ret); 367 } 368 irq_data->domain = NULL; 369 irq_data->hwirq = 0; 370 mutex_unlock(&irq_domain_mutex); 371 return ret; 372 } 373 374 /* If not already assigned, give the domain the chip's name */ 375 if (!domain->name && irq_data->chip) 376 domain->name = irq_data->chip->name; 377 } 378 379 if (hwirq < domain->revmap_size) { 380 domain->linear_revmap[hwirq] = virq; 381 } else { 382 mutex_lock(&revmap_trees_mutex); 383 radix_tree_insert(&domain->revmap_tree, hwirq, irq_data); 384 mutex_unlock(&revmap_trees_mutex); 385 } 386 mutex_unlock(&irq_domain_mutex); 387 388 irq_clear_status_flags(virq, IRQ_NOREQUEST); 389 390 return 0; 391 } 392 EXPORT_SYMBOL_GPL(irq_domain_associate); 393 394 void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base, 395 irq_hw_number_t hwirq_base, int count) 396 { 397 struct device_node *of_node; 398 int i; 399 400 of_node = irq_domain_get_of_node(domain); 401 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__, 402 of_node_full_name(of_node), irq_base, (int)hwirq_base, count); 403 404 for (i = 0; i < count; i++) { 405 irq_domain_associate(domain, irq_base + i, hwirq_base + i); 406 } 407 } 408 EXPORT_SYMBOL_GPL(irq_domain_associate_many); 409 410 /** 411 * irq_create_direct_mapping() - Allocate an irq for direct mapping 412 * @domain: domain to allocate the irq for or NULL for default domain 413 * 414 * This routine is used for irq controllers which can choose the hardware 415 * interrupt numbers they generate. In such a case it's simplest to use 416 * the linux irq as the hardware interrupt number. It still uses the linear 417 * or radix tree to store the mapping, but the irq controller can optimize 418 * the revmap path by using the hwirq directly. 419 */ 420 unsigned int irq_create_direct_mapping(struct irq_domain *domain) 421 { 422 struct device_node *of_node; 423 unsigned int virq; 424 425 if (domain == NULL) 426 domain = irq_default_domain; 427 428 of_node = irq_domain_get_of_node(domain); 429 virq = irq_alloc_desc_from(1, of_node_to_nid(of_node)); 430 if (!virq) { 431 pr_debug("create_direct virq allocation failed\n"); 432 return 0; 433 } 434 if (virq >= domain->revmap_direct_max_irq) { 435 pr_err("ERROR: no free irqs available below %i maximum\n", 436 domain->revmap_direct_max_irq); 437 irq_free_desc(virq); 438 return 0; 439 } 440 pr_debug("create_direct obtained virq %d\n", virq); 441 442 if (irq_domain_associate(domain, virq, virq)) { 443 irq_free_desc(virq); 444 return 0; 445 } 446 447 return virq; 448 } 449 EXPORT_SYMBOL_GPL(irq_create_direct_mapping); 450 451 /** 452 * irq_create_mapping() - Map a hardware interrupt into linux irq space 453 * @domain: domain owning this hardware interrupt or NULL for default domain 454 * @hwirq: hardware irq number in that domain space 455 * 456 * Only one mapping per hardware interrupt is permitted. Returns a linux 457 * irq number. 458 * If the sense/trigger is to be specified, set_irq_type() should be called 459 * on the number returned from that call. 460 */ 461 unsigned int irq_create_mapping(struct irq_domain *domain, 462 irq_hw_number_t hwirq) 463 { 464 struct device_node *of_node; 465 int virq; 466 467 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq); 468 469 /* Look for default domain if nececssary */ 470 if (domain == NULL) 471 domain = irq_default_domain; 472 if (domain == NULL) { 473 WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq); 474 return 0; 475 } 476 pr_debug("-> using domain @%p\n", domain); 477 478 of_node = irq_domain_get_of_node(domain); 479 480 /* Check if mapping already exists */ 481 virq = irq_find_mapping(domain, hwirq); 482 if (virq) { 483 pr_debug("-> existing mapping on virq %d\n", virq); 484 return virq; 485 } 486 487 /* Allocate a virtual interrupt number */ 488 virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node)); 489 if (virq <= 0) { 490 pr_debug("-> virq allocation failed\n"); 491 return 0; 492 } 493 494 if (irq_domain_associate(domain, virq, hwirq)) { 495 irq_free_desc(virq); 496 return 0; 497 } 498 499 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n", 500 hwirq, of_node_full_name(of_node), virq); 501 502 return virq; 503 } 504 EXPORT_SYMBOL_GPL(irq_create_mapping); 505 506 /** 507 * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs 508 * @domain: domain owning the interrupt range 509 * @irq_base: beginning of linux IRQ range 510 * @hwirq_base: beginning of hardware IRQ range 511 * @count: Number of interrupts to map 512 * 513 * This routine is used for allocating and mapping a range of hardware 514 * irqs to linux irqs where the linux irq numbers are at pre-defined 515 * locations. For use by controllers that already have static mappings 516 * to insert in to the domain. 517 * 518 * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time 519 * domain insertion. 520 * 521 * 0 is returned upon success, while any failure to establish a static 522 * mapping is treated as an error. 523 */ 524 int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base, 525 irq_hw_number_t hwirq_base, int count) 526 { 527 struct device_node *of_node; 528 int ret; 529 530 of_node = irq_domain_get_of_node(domain); 531 ret = irq_alloc_descs(irq_base, irq_base, count, 532 of_node_to_nid(of_node)); 533 if (unlikely(ret < 0)) 534 return ret; 535 536 irq_domain_associate_many(domain, irq_base, hwirq_base, count); 537 return 0; 538 } 539 EXPORT_SYMBOL_GPL(irq_create_strict_mappings); 540 541 static int irq_domain_translate(struct irq_domain *d, 542 struct irq_fwspec *fwspec, 543 irq_hw_number_t *hwirq, unsigned int *type) 544 { 545 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 546 if (d->ops->translate) 547 return d->ops->translate(d, fwspec, hwirq, type); 548 #endif 549 if (d->ops->xlate) 550 return d->ops->xlate(d, to_of_node(fwspec->fwnode), 551 fwspec->param, fwspec->param_count, 552 hwirq, type); 553 554 /* If domain has no translation, then we assume interrupt line */ 555 *hwirq = fwspec->param[0]; 556 return 0; 557 } 558 559 static void of_phandle_args_to_fwspec(struct of_phandle_args *irq_data, 560 struct irq_fwspec *fwspec) 561 { 562 int i; 563 564 fwspec->fwnode = irq_data->np ? &irq_data->np->fwnode : NULL; 565 fwspec->param_count = irq_data->args_count; 566 567 for (i = 0; i < irq_data->args_count; i++) 568 fwspec->param[i] = irq_data->args[i]; 569 } 570 571 unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec) 572 { 573 struct irq_domain *domain; 574 irq_hw_number_t hwirq; 575 unsigned int type = IRQ_TYPE_NONE; 576 int virq; 577 578 if (fwspec->fwnode) 579 domain = irq_find_matching_fwnode(fwspec->fwnode, DOMAIN_BUS_ANY); 580 else 581 domain = irq_default_domain; 582 583 if (!domain) { 584 pr_warn("no irq domain found for %s !\n", 585 of_node_full_name(to_of_node(fwspec->fwnode))); 586 return 0; 587 } 588 589 if (irq_domain_translate(domain, fwspec, &hwirq, &type)) 590 return 0; 591 592 if (irq_domain_is_hierarchy(domain)) { 593 /* 594 * If we've already configured this interrupt, 595 * don't do it again, or hell will break loose. 596 */ 597 virq = irq_find_mapping(domain, hwirq); 598 if (virq) 599 return virq; 600 601 virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, fwspec); 602 if (virq <= 0) 603 return 0; 604 } else { 605 /* Create mapping */ 606 virq = irq_create_mapping(domain, hwirq); 607 if (!virq) 608 return virq; 609 } 610 611 /* Set type if specified and different than the current one */ 612 if (type != IRQ_TYPE_NONE && 613 type != irq_get_trigger_type(virq)) 614 irq_set_irq_type(virq, type); 615 return virq; 616 } 617 EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping); 618 619 unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data) 620 { 621 struct irq_fwspec fwspec; 622 623 of_phandle_args_to_fwspec(irq_data, &fwspec); 624 return irq_create_fwspec_mapping(&fwspec); 625 } 626 EXPORT_SYMBOL_GPL(irq_create_of_mapping); 627 628 /** 629 * irq_dispose_mapping() - Unmap an interrupt 630 * @virq: linux irq number of the interrupt to unmap 631 */ 632 void irq_dispose_mapping(unsigned int virq) 633 { 634 struct irq_data *irq_data = irq_get_irq_data(virq); 635 struct irq_domain *domain; 636 637 if (!virq || !irq_data) 638 return; 639 640 domain = irq_data->domain; 641 if (WARN_ON(domain == NULL)) 642 return; 643 644 irq_domain_disassociate(domain, virq); 645 irq_free_desc(virq); 646 } 647 EXPORT_SYMBOL_GPL(irq_dispose_mapping); 648 649 /** 650 * irq_find_mapping() - Find a linux irq from an hw irq number. 651 * @domain: domain owning this hardware interrupt 652 * @hwirq: hardware irq number in that domain space 653 */ 654 unsigned int irq_find_mapping(struct irq_domain *domain, 655 irq_hw_number_t hwirq) 656 { 657 struct irq_data *data; 658 659 /* Look for default domain if nececssary */ 660 if (domain == NULL) 661 domain = irq_default_domain; 662 if (domain == NULL) 663 return 0; 664 665 if (hwirq < domain->revmap_direct_max_irq) { 666 data = irq_domain_get_irq_data(domain, hwirq); 667 if (data && data->hwirq == hwirq) 668 return hwirq; 669 } 670 671 /* Check if the hwirq is in the linear revmap. */ 672 if (hwirq < domain->revmap_size) 673 return domain->linear_revmap[hwirq]; 674 675 rcu_read_lock(); 676 data = radix_tree_lookup(&domain->revmap_tree, hwirq); 677 rcu_read_unlock(); 678 return data ? data->irq : 0; 679 } 680 EXPORT_SYMBOL_GPL(irq_find_mapping); 681 682 #ifdef CONFIG_IRQ_DOMAIN_DEBUG 683 static int virq_debug_show(struct seq_file *m, void *private) 684 { 685 unsigned long flags; 686 struct irq_desc *desc; 687 struct irq_domain *domain; 688 struct radix_tree_iter iter; 689 void *data, **slot; 690 int i; 691 692 seq_printf(m, " %-16s %-6s %-10s %-10s %s\n", 693 "name", "mapped", "linear-max", "direct-max", "devtree-node"); 694 mutex_lock(&irq_domain_mutex); 695 list_for_each_entry(domain, &irq_domain_list, link) { 696 struct device_node *of_node; 697 int count = 0; 698 of_node = irq_domain_get_of_node(domain); 699 radix_tree_for_each_slot(slot, &domain->revmap_tree, &iter, 0) 700 count++; 701 seq_printf(m, "%c%-16s %6u %10u %10u %s\n", 702 domain == irq_default_domain ? '*' : ' ', domain->name, 703 domain->revmap_size + count, domain->revmap_size, 704 domain->revmap_direct_max_irq, 705 of_node ? of_node_full_name(of_node) : ""); 706 } 707 mutex_unlock(&irq_domain_mutex); 708 709 seq_printf(m, "%-5s %-7s %-15s %-*s %6s %-14s %s\n", "irq", "hwirq", 710 "chip name", (int)(2 * sizeof(void *) + 2), "chip data", 711 "active", "type", "domain"); 712 713 for (i = 1; i < nr_irqs; i++) { 714 desc = irq_to_desc(i); 715 if (!desc) 716 continue; 717 718 raw_spin_lock_irqsave(&desc->lock, flags); 719 domain = desc->irq_data.domain; 720 721 if (domain) { 722 struct irq_chip *chip; 723 int hwirq = desc->irq_data.hwirq; 724 bool direct; 725 726 seq_printf(m, "%5d ", i); 727 seq_printf(m, "0x%05x ", hwirq); 728 729 chip = irq_desc_get_chip(desc); 730 seq_printf(m, "%-15s ", (chip && chip->name) ? chip->name : "none"); 731 732 data = irq_desc_get_chip_data(desc); 733 seq_printf(m, data ? "0x%p " : " %p ", data); 734 735 seq_printf(m, " %c ", (desc->action && desc->action->handler) ? '*' : ' '); 736 direct = (i == hwirq) && (i < domain->revmap_direct_max_irq); 737 seq_printf(m, "%6s%-8s ", 738 (hwirq < domain->revmap_size) ? "LINEAR" : "RADIX", 739 direct ? "(DIRECT)" : ""); 740 seq_printf(m, "%s\n", desc->irq_data.domain->name); 741 } 742 743 raw_spin_unlock_irqrestore(&desc->lock, flags); 744 } 745 746 return 0; 747 } 748 749 static int virq_debug_open(struct inode *inode, struct file *file) 750 { 751 return single_open(file, virq_debug_show, inode->i_private); 752 } 753 754 static const struct file_operations virq_debug_fops = { 755 .open = virq_debug_open, 756 .read = seq_read, 757 .llseek = seq_lseek, 758 .release = single_release, 759 }; 760 761 static int __init irq_debugfs_init(void) 762 { 763 if (debugfs_create_file("irq_domain_mapping", S_IRUGO, NULL, 764 NULL, &virq_debug_fops) == NULL) 765 return -ENOMEM; 766 767 return 0; 768 } 769 __initcall(irq_debugfs_init); 770 #endif /* CONFIG_IRQ_DOMAIN_DEBUG */ 771 772 /** 773 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings 774 * 775 * Device Tree IRQ specifier translation function which works with one cell 776 * bindings where the cell value maps directly to the hwirq number. 777 */ 778 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr, 779 const u32 *intspec, unsigned int intsize, 780 unsigned long *out_hwirq, unsigned int *out_type) 781 { 782 if (WARN_ON(intsize < 1)) 783 return -EINVAL; 784 *out_hwirq = intspec[0]; 785 *out_type = IRQ_TYPE_NONE; 786 return 0; 787 } 788 EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell); 789 790 /** 791 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings 792 * 793 * Device Tree IRQ specifier translation function which works with two cell 794 * bindings where the cell values map directly to the hwirq number 795 * and linux irq flags. 796 */ 797 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr, 798 const u32 *intspec, unsigned int intsize, 799 irq_hw_number_t *out_hwirq, unsigned int *out_type) 800 { 801 if (WARN_ON(intsize < 2)) 802 return -EINVAL; 803 *out_hwirq = intspec[0]; 804 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK; 805 return 0; 806 } 807 EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell); 808 809 /** 810 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings 811 * 812 * Device Tree IRQ specifier translation function which works with either one 813 * or two cell bindings where the cell values map directly to the hwirq number 814 * and linux irq flags. 815 * 816 * Note: don't use this function unless your interrupt controller explicitly 817 * supports both one and two cell bindings. For the majority of controllers 818 * the _onecell() or _twocell() variants above should be used. 819 */ 820 int irq_domain_xlate_onetwocell(struct irq_domain *d, 821 struct device_node *ctrlr, 822 const u32 *intspec, unsigned int intsize, 823 unsigned long *out_hwirq, unsigned int *out_type) 824 { 825 if (WARN_ON(intsize < 1)) 826 return -EINVAL; 827 *out_hwirq = intspec[0]; 828 *out_type = (intsize > 1) ? intspec[1] : IRQ_TYPE_NONE; 829 return 0; 830 } 831 EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell); 832 833 const struct irq_domain_ops irq_domain_simple_ops = { 834 .xlate = irq_domain_xlate_onetwocell, 835 }; 836 EXPORT_SYMBOL_GPL(irq_domain_simple_ops); 837 838 static int irq_domain_alloc_descs(int virq, unsigned int cnt, 839 irq_hw_number_t hwirq, int node) 840 { 841 unsigned int hint; 842 843 if (virq >= 0) { 844 virq = irq_alloc_descs(virq, virq, cnt, node); 845 } else { 846 hint = hwirq % nr_irqs; 847 if (hint == 0) 848 hint++; 849 virq = irq_alloc_descs_from(hint, cnt, node); 850 if (virq <= 0 && hint > 1) 851 virq = irq_alloc_descs_from(1, cnt, node); 852 } 853 854 return virq; 855 } 856 857 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 858 /** 859 * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy 860 * @parent: Parent irq domain to associate with the new domain 861 * @flags: Irq domain flags associated to the domain 862 * @size: Size of the domain. See below 863 * @fwnode: Optional fwnode of the interrupt controller 864 * @ops: Pointer to the interrupt domain callbacks 865 * @host_data: Controller private data pointer 866 * 867 * If @size is 0 a tree domain is created, otherwise a linear domain. 868 * 869 * If successful the parent is associated to the new domain and the 870 * domain flags are set. 871 * Returns pointer to IRQ domain, or NULL on failure. 872 */ 873 struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent, 874 unsigned int flags, 875 unsigned int size, 876 struct fwnode_handle *fwnode, 877 const struct irq_domain_ops *ops, 878 void *host_data) 879 { 880 struct irq_domain *domain; 881 882 if (size) 883 domain = irq_domain_create_linear(fwnode, size, ops, host_data); 884 else 885 domain = irq_domain_create_tree(fwnode, ops, host_data); 886 if (domain) { 887 domain->parent = parent; 888 domain->flags |= flags; 889 } 890 891 return domain; 892 } 893 894 static void irq_domain_insert_irq(int virq) 895 { 896 struct irq_data *data; 897 898 for (data = irq_get_irq_data(virq); data; data = data->parent_data) { 899 struct irq_domain *domain = data->domain; 900 irq_hw_number_t hwirq = data->hwirq; 901 902 if (hwirq < domain->revmap_size) { 903 domain->linear_revmap[hwirq] = virq; 904 } else { 905 mutex_lock(&revmap_trees_mutex); 906 radix_tree_insert(&domain->revmap_tree, hwirq, data); 907 mutex_unlock(&revmap_trees_mutex); 908 } 909 910 /* If not already assigned, give the domain the chip's name */ 911 if (!domain->name && data->chip) 912 domain->name = data->chip->name; 913 } 914 915 irq_clear_status_flags(virq, IRQ_NOREQUEST); 916 } 917 918 static void irq_domain_remove_irq(int virq) 919 { 920 struct irq_data *data; 921 922 irq_set_status_flags(virq, IRQ_NOREQUEST); 923 irq_set_chip_and_handler(virq, NULL, NULL); 924 synchronize_irq(virq); 925 smp_mb(); 926 927 for (data = irq_get_irq_data(virq); data; data = data->parent_data) { 928 struct irq_domain *domain = data->domain; 929 irq_hw_number_t hwirq = data->hwirq; 930 931 if (hwirq < domain->revmap_size) { 932 domain->linear_revmap[hwirq] = 0; 933 } else { 934 mutex_lock(&revmap_trees_mutex); 935 radix_tree_delete(&domain->revmap_tree, hwirq); 936 mutex_unlock(&revmap_trees_mutex); 937 } 938 } 939 } 940 941 static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain, 942 struct irq_data *child) 943 { 944 struct irq_data *irq_data; 945 946 irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL, 947 irq_data_get_node(child)); 948 if (irq_data) { 949 child->parent_data = irq_data; 950 irq_data->irq = child->irq; 951 irq_data->common = child->common; 952 irq_data->domain = domain; 953 } 954 955 return irq_data; 956 } 957 958 static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs) 959 { 960 struct irq_data *irq_data, *tmp; 961 int i; 962 963 for (i = 0; i < nr_irqs; i++) { 964 irq_data = irq_get_irq_data(virq + i); 965 tmp = irq_data->parent_data; 966 irq_data->parent_data = NULL; 967 irq_data->domain = NULL; 968 969 while (tmp) { 970 irq_data = tmp; 971 tmp = tmp->parent_data; 972 kfree(irq_data); 973 } 974 } 975 } 976 977 static int irq_domain_alloc_irq_data(struct irq_domain *domain, 978 unsigned int virq, unsigned int nr_irqs) 979 { 980 struct irq_data *irq_data; 981 struct irq_domain *parent; 982 int i; 983 984 /* The outermost irq_data is embedded in struct irq_desc */ 985 for (i = 0; i < nr_irqs; i++) { 986 irq_data = irq_get_irq_data(virq + i); 987 irq_data->domain = domain; 988 989 for (parent = domain->parent; parent; parent = parent->parent) { 990 irq_data = irq_domain_insert_irq_data(parent, irq_data); 991 if (!irq_data) { 992 irq_domain_free_irq_data(virq, i + 1); 993 return -ENOMEM; 994 } 995 } 996 } 997 998 return 0; 999 } 1000 1001 /** 1002 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain 1003 * @domain: domain to match 1004 * @virq: IRQ number to get irq_data 1005 */ 1006 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, 1007 unsigned int virq) 1008 { 1009 struct irq_data *irq_data; 1010 1011 for (irq_data = irq_get_irq_data(virq); irq_data; 1012 irq_data = irq_data->parent_data) 1013 if (irq_data->domain == domain) 1014 return irq_data; 1015 1016 return NULL; 1017 } 1018 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data); 1019 1020 /** 1021 * irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain 1022 * @domain: Interrupt domain to match 1023 * @virq: IRQ number 1024 * @hwirq: The hwirq number 1025 * @chip: The associated interrupt chip 1026 * @chip_data: The associated chip data 1027 */ 1028 int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq, 1029 irq_hw_number_t hwirq, struct irq_chip *chip, 1030 void *chip_data) 1031 { 1032 struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq); 1033 1034 if (!irq_data) 1035 return -ENOENT; 1036 1037 irq_data->hwirq = hwirq; 1038 irq_data->chip = chip ? chip : &no_irq_chip; 1039 irq_data->chip_data = chip_data; 1040 1041 return 0; 1042 } 1043 1044 /** 1045 * irq_domain_set_info - Set the complete data for a @virq in @domain 1046 * @domain: Interrupt domain to match 1047 * @virq: IRQ number 1048 * @hwirq: The hardware interrupt number 1049 * @chip: The associated interrupt chip 1050 * @chip_data: The associated interrupt chip data 1051 * @handler: The interrupt flow handler 1052 * @handler_data: The interrupt flow handler data 1053 * @handler_name: The interrupt handler name 1054 */ 1055 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, 1056 irq_hw_number_t hwirq, struct irq_chip *chip, 1057 void *chip_data, irq_flow_handler_t handler, 1058 void *handler_data, const char *handler_name) 1059 { 1060 irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data); 1061 __irq_set_handler(virq, handler, 0, handler_name); 1062 irq_set_handler_data(virq, handler_data); 1063 } 1064 EXPORT_SYMBOL(irq_domain_set_info); 1065 1066 /** 1067 * irq_domain_reset_irq_data - Clear hwirq, chip and chip_data in @irq_data 1068 * @irq_data: The pointer to irq_data 1069 */ 1070 void irq_domain_reset_irq_data(struct irq_data *irq_data) 1071 { 1072 irq_data->hwirq = 0; 1073 irq_data->chip = &no_irq_chip; 1074 irq_data->chip_data = NULL; 1075 } 1076 1077 /** 1078 * irq_domain_free_irqs_common - Clear irq_data and free the parent 1079 * @domain: Interrupt domain to match 1080 * @virq: IRQ number to start with 1081 * @nr_irqs: The number of irqs to free 1082 */ 1083 void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq, 1084 unsigned int nr_irqs) 1085 { 1086 struct irq_data *irq_data; 1087 int i; 1088 1089 for (i = 0; i < nr_irqs; i++) { 1090 irq_data = irq_domain_get_irq_data(domain, virq + i); 1091 if (irq_data) 1092 irq_domain_reset_irq_data(irq_data); 1093 } 1094 irq_domain_free_irqs_parent(domain, virq, nr_irqs); 1095 } 1096 1097 /** 1098 * irq_domain_free_irqs_top - Clear handler and handler data, clear irqdata and free parent 1099 * @domain: Interrupt domain to match 1100 * @virq: IRQ number to start with 1101 * @nr_irqs: The number of irqs to free 1102 */ 1103 void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq, 1104 unsigned int nr_irqs) 1105 { 1106 int i; 1107 1108 for (i = 0; i < nr_irqs; i++) { 1109 irq_set_handler_data(virq + i, NULL); 1110 irq_set_handler(virq + i, NULL); 1111 } 1112 irq_domain_free_irqs_common(domain, virq, nr_irqs); 1113 } 1114 1115 static bool irq_domain_is_auto_recursive(struct irq_domain *domain) 1116 { 1117 return domain->flags & IRQ_DOMAIN_FLAG_AUTO_RECURSIVE; 1118 } 1119 1120 static void irq_domain_free_irqs_recursive(struct irq_domain *domain, 1121 unsigned int irq_base, 1122 unsigned int nr_irqs) 1123 { 1124 domain->ops->free(domain, irq_base, nr_irqs); 1125 if (irq_domain_is_auto_recursive(domain)) { 1126 BUG_ON(!domain->parent); 1127 irq_domain_free_irqs_recursive(domain->parent, irq_base, 1128 nr_irqs); 1129 } 1130 } 1131 1132 int irq_domain_alloc_irqs_recursive(struct irq_domain *domain, 1133 unsigned int irq_base, 1134 unsigned int nr_irqs, void *arg) 1135 { 1136 int ret = 0; 1137 struct irq_domain *parent = domain->parent; 1138 bool recursive = irq_domain_is_auto_recursive(domain); 1139 1140 BUG_ON(recursive && !parent); 1141 if (recursive) 1142 ret = irq_domain_alloc_irqs_recursive(parent, irq_base, 1143 nr_irqs, arg); 1144 if (ret >= 0) 1145 ret = domain->ops->alloc(domain, irq_base, nr_irqs, arg); 1146 if (ret < 0 && recursive) 1147 irq_domain_free_irqs_recursive(parent, irq_base, nr_irqs); 1148 1149 return ret; 1150 } 1151 1152 /** 1153 * __irq_domain_alloc_irqs - Allocate IRQs from domain 1154 * @domain: domain to allocate from 1155 * @irq_base: allocate specified IRQ nubmer if irq_base >= 0 1156 * @nr_irqs: number of IRQs to allocate 1157 * @node: NUMA node id for memory allocation 1158 * @arg: domain specific argument 1159 * @realloc: IRQ descriptors have already been allocated if true 1160 * 1161 * Allocate IRQ numbers and initialized all data structures to support 1162 * hierarchy IRQ domains. 1163 * Parameter @realloc is mainly to support legacy IRQs. 1164 * Returns error code or allocated IRQ number 1165 * 1166 * The whole process to setup an IRQ has been split into two steps. 1167 * The first step, __irq_domain_alloc_irqs(), is to allocate IRQ 1168 * descriptor and required hardware resources. The second step, 1169 * irq_domain_activate_irq(), is to program hardwares with preallocated 1170 * resources. In this way, it's easier to rollback when failing to 1171 * allocate resources. 1172 */ 1173 int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, 1174 unsigned int nr_irqs, int node, void *arg, 1175 bool realloc) 1176 { 1177 int i, ret, virq; 1178 1179 if (domain == NULL) { 1180 domain = irq_default_domain; 1181 if (WARN(!domain, "domain is NULL; cannot allocate IRQ\n")) 1182 return -EINVAL; 1183 } 1184 1185 if (!domain->ops->alloc) { 1186 pr_debug("domain->ops->alloc() is NULL\n"); 1187 return -ENOSYS; 1188 } 1189 1190 if (realloc && irq_base >= 0) { 1191 virq = irq_base; 1192 } else { 1193 virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node); 1194 if (virq < 0) { 1195 pr_debug("cannot allocate IRQ(base %d, count %d)\n", 1196 irq_base, nr_irqs); 1197 return virq; 1198 } 1199 } 1200 1201 if (irq_domain_alloc_irq_data(domain, virq, nr_irqs)) { 1202 pr_debug("cannot allocate memory for IRQ%d\n", virq); 1203 ret = -ENOMEM; 1204 goto out_free_desc; 1205 } 1206 1207 mutex_lock(&irq_domain_mutex); 1208 ret = irq_domain_alloc_irqs_recursive(domain, virq, nr_irqs, arg); 1209 if (ret < 0) { 1210 mutex_unlock(&irq_domain_mutex); 1211 goto out_free_irq_data; 1212 } 1213 for (i = 0; i < nr_irqs; i++) 1214 irq_domain_insert_irq(virq + i); 1215 mutex_unlock(&irq_domain_mutex); 1216 1217 return virq; 1218 1219 out_free_irq_data: 1220 irq_domain_free_irq_data(virq, nr_irqs); 1221 out_free_desc: 1222 irq_free_descs(virq, nr_irqs); 1223 return ret; 1224 } 1225 1226 /** 1227 * irq_domain_free_irqs - Free IRQ number and associated data structures 1228 * @virq: base IRQ number 1229 * @nr_irqs: number of IRQs to free 1230 */ 1231 void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs) 1232 { 1233 struct irq_data *data = irq_get_irq_data(virq); 1234 int i; 1235 1236 if (WARN(!data || !data->domain || !data->domain->ops->free, 1237 "NULL pointer, cannot free irq\n")) 1238 return; 1239 1240 mutex_lock(&irq_domain_mutex); 1241 for (i = 0; i < nr_irqs; i++) 1242 irq_domain_remove_irq(virq + i); 1243 irq_domain_free_irqs_recursive(data->domain, virq, nr_irqs); 1244 mutex_unlock(&irq_domain_mutex); 1245 1246 irq_domain_free_irq_data(virq, nr_irqs); 1247 irq_free_descs(virq, nr_irqs); 1248 } 1249 1250 /** 1251 * irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain 1252 * @irq_base: Base IRQ number 1253 * @nr_irqs: Number of IRQs to allocate 1254 * @arg: Allocation data (arch/domain specific) 1255 * 1256 * Check whether the domain has been setup recursive. If not allocate 1257 * through the parent domain. 1258 */ 1259 int irq_domain_alloc_irqs_parent(struct irq_domain *domain, 1260 unsigned int irq_base, unsigned int nr_irqs, 1261 void *arg) 1262 { 1263 /* irq_domain_alloc_irqs_recursive() has called parent's alloc() */ 1264 if (irq_domain_is_auto_recursive(domain)) 1265 return 0; 1266 1267 domain = domain->parent; 1268 if (domain) 1269 return irq_domain_alloc_irqs_recursive(domain, irq_base, 1270 nr_irqs, arg); 1271 return -ENOSYS; 1272 } 1273 1274 /** 1275 * irq_domain_free_irqs_parent - Free interrupts from parent domain 1276 * @irq_base: Base IRQ number 1277 * @nr_irqs: Number of IRQs to free 1278 * 1279 * Check whether the domain has been setup recursive. If not free 1280 * through the parent domain. 1281 */ 1282 void irq_domain_free_irqs_parent(struct irq_domain *domain, 1283 unsigned int irq_base, unsigned int nr_irqs) 1284 { 1285 /* irq_domain_free_irqs_recursive() will call parent's free */ 1286 if (!irq_domain_is_auto_recursive(domain) && domain->parent) 1287 irq_domain_free_irqs_recursive(domain->parent, irq_base, 1288 nr_irqs); 1289 } 1290 1291 /** 1292 * irq_domain_activate_irq - Call domain_ops->activate recursively to activate 1293 * interrupt 1294 * @irq_data: outermost irq_data associated with interrupt 1295 * 1296 * This is the second step to call domain_ops->activate to program interrupt 1297 * controllers, so the interrupt could actually get delivered. 1298 */ 1299 void irq_domain_activate_irq(struct irq_data *irq_data) 1300 { 1301 if (irq_data && irq_data->domain) { 1302 struct irq_domain *domain = irq_data->domain; 1303 1304 if (irq_data->parent_data) 1305 irq_domain_activate_irq(irq_data->parent_data); 1306 if (domain->ops->activate) 1307 domain->ops->activate(domain, irq_data); 1308 } 1309 } 1310 1311 /** 1312 * irq_domain_deactivate_irq - Call domain_ops->deactivate recursively to 1313 * deactivate interrupt 1314 * @irq_data: outermost irq_data associated with interrupt 1315 * 1316 * It calls domain_ops->deactivate to program interrupt controllers to disable 1317 * interrupt delivery. 1318 */ 1319 void irq_domain_deactivate_irq(struct irq_data *irq_data) 1320 { 1321 if (irq_data && irq_data->domain) { 1322 struct irq_domain *domain = irq_data->domain; 1323 1324 if (domain->ops->deactivate) 1325 domain->ops->deactivate(domain, irq_data); 1326 if (irq_data->parent_data) 1327 irq_domain_deactivate_irq(irq_data->parent_data); 1328 } 1329 } 1330 1331 static void irq_domain_check_hierarchy(struct irq_domain *domain) 1332 { 1333 /* Hierarchy irq_domains must implement callback alloc() */ 1334 if (domain->ops->alloc) 1335 domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY; 1336 } 1337 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 1338 /** 1339 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain 1340 * @domain: domain to match 1341 * @virq: IRQ number to get irq_data 1342 */ 1343 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, 1344 unsigned int virq) 1345 { 1346 struct irq_data *irq_data = irq_get_irq_data(virq); 1347 1348 return (irq_data && irq_data->domain == domain) ? irq_data : NULL; 1349 } 1350 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data); 1351 1352 /** 1353 * irq_domain_set_info - Set the complete data for a @virq in @domain 1354 * @domain: Interrupt domain to match 1355 * @virq: IRQ number 1356 * @hwirq: The hardware interrupt number 1357 * @chip: The associated interrupt chip 1358 * @chip_data: The associated interrupt chip data 1359 * @handler: The interrupt flow handler 1360 * @handler_data: The interrupt flow handler data 1361 * @handler_name: The interrupt handler name 1362 */ 1363 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, 1364 irq_hw_number_t hwirq, struct irq_chip *chip, 1365 void *chip_data, irq_flow_handler_t handler, 1366 void *handler_data, const char *handler_name) 1367 { 1368 irq_set_chip_and_handler_name(virq, chip, handler, handler_name); 1369 irq_set_chip_data(virq, chip_data); 1370 irq_set_handler_data(virq, handler_data); 1371 } 1372 1373 static void irq_domain_check_hierarchy(struct irq_domain *domain) 1374 { 1375 } 1376 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 1377