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 void irq_domain_check_hierarchy(struct irq_domain *domain); 27 28 struct irqchip_fwid { 29 struct fwnode_handle fwnode; 30 char *name; 31 void *data; 32 }; 33 34 /** 35 * irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for 36 * identifying an irq domain 37 * @data: optional user-provided data 38 * 39 * Allocate a struct device_node, and return a poiner to the embedded 40 * fwnode_handle (or NULL on failure). 41 */ 42 struct fwnode_handle *irq_domain_alloc_fwnode(void *data) 43 { 44 struct irqchip_fwid *fwid; 45 char *name; 46 47 fwid = kzalloc(sizeof(*fwid), GFP_KERNEL); 48 name = kasprintf(GFP_KERNEL, "irqchip@%p", data); 49 50 if (!fwid || !name) { 51 kfree(fwid); 52 kfree(name); 53 return NULL; 54 } 55 56 fwid->name = name; 57 fwid->data = data; 58 fwid->fwnode.type = FWNODE_IRQCHIP; 59 return &fwid->fwnode; 60 } 61 EXPORT_SYMBOL_GPL(irq_domain_alloc_fwnode); 62 63 /** 64 * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle 65 * 66 * Free a fwnode_handle allocated with irq_domain_alloc_fwnode. 67 */ 68 void irq_domain_free_fwnode(struct fwnode_handle *fwnode) 69 { 70 struct irqchip_fwid *fwid; 71 72 if (WARN_ON(!is_fwnode_irqchip(fwnode))) 73 return; 74 75 fwid = container_of(fwnode, struct irqchip_fwid, fwnode); 76 kfree(fwid->name); 77 kfree(fwid); 78 } 79 EXPORT_SYMBOL_GPL(irq_domain_free_fwnode); 80 81 /** 82 * __irq_domain_add() - Allocate a new irq_domain data structure 83 * @of_node: optional device-tree node of the interrupt controller 84 * @size: Size of linear map; 0 for radix mapping only 85 * @hwirq_max: Maximum number of interrupts supported by controller 86 * @direct_max: Maximum value of direct maps; Use ~0 for no limit; 0 for no 87 * direct mapping 88 * @ops: domain callbacks 89 * @host_data: Controller private data pointer 90 * 91 * Allocates and initialize and irq_domain structure. 92 * Returns pointer to IRQ domain, or NULL on failure. 93 */ 94 struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size, 95 irq_hw_number_t hwirq_max, int direct_max, 96 const struct irq_domain_ops *ops, 97 void *host_data) 98 { 99 struct irq_domain *domain; 100 struct device_node *of_node; 101 102 of_node = to_of_node(fwnode); 103 104 domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size), 105 GFP_KERNEL, of_node_to_nid(of_node)); 106 if (WARN_ON(!domain)) 107 return NULL; 108 109 of_node_get(of_node); 110 111 /* Fill structure */ 112 INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL); 113 domain->ops = ops; 114 domain->host_data = host_data; 115 domain->fwnode = fwnode; 116 domain->hwirq_max = hwirq_max; 117 domain->revmap_size = size; 118 domain->revmap_direct_max_irq = direct_max; 119 irq_domain_check_hierarchy(domain); 120 121 mutex_lock(&irq_domain_mutex); 122 list_add(&domain->link, &irq_domain_list); 123 mutex_unlock(&irq_domain_mutex); 124 125 pr_debug("Added domain %s\n", domain->name); 126 return domain; 127 } 128 EXPORT_SYMBOL_GPL(__irq_domain_add); 129 130 /** 131 * irq_domain_remove() - Remove an irq domain. 132 * @domain: domain to remove 133 * 134 * This routine is used to remove an irq domain. The caller must ensure 135 * that all mappings within the domain have been disposed of prior to 136 * use, depending on the revmap type. 137 */ 138 void irq_domain_remove(struct irq_domain *domain) 139 { 140 mutex_lock(&irq_domain_mutex); 141 142 /* 143 * radix_tree_delete() takes care of destroying the root 144 * node when all entries are removed. Shout if there are 145 * any mappings left. 146 */ 147 WARN_ON(domain->revmap_tree.height); 148 149 list_del(&domain->link); 150 151 /* 152 * If the going away domain is the default one, reset it. 153 */ 154 if (unlikely(irq_default_domain == domain)) 155 irq_set_default_host(NULL); 156 157 mutex_unlock(&irq_domain_mutex); 158 159 pr_debug("Removed domain %s\n", domain->name); 160 161 of_node_put(irq_domain_get_of_node(domain)); 162 kfree(domain); 163 } 164 EXPORT_SYMBOL_GPL(irq_domain_remove); 165 166 /** 167 * irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs 168 * @of_node: pointer to interrupt controller's device tree node. 169 * @size: total number of irqs in mapping 170 * @first_irq: first number of irq block assigned to the domain, 171 * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then 172 * pre-map all of the irqs in the domain to virqs starting at first_irq. 173 * @ops: domain callbacks 174 * @host_data: Controller private data pointer 175 * 176 * Allocates an irq_domain, and optionally if first_irq is positive then also 177 * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq. 178 * 179 * This is intended to implement the expected behaviour for most 180 * interrupt controllers. If device tree is used, then first_irq will be 0 and 181 * irqs get mapped dynamically on the fly. However, if the controller requires 182 * static virq assignments (non-DT boot) then it will set that up correctly. 183 */ 184 struct irq_domain *irq_domain_add_simple(struct device_node *of_node, 185 unsigned int size, 186 unsigned int first_irq, 187 const struct irq_domain_ops *ops, 188 void *host_data) 189 { 190 struct irq_domain *domain; 191 192 domain = __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data); 193 if (!domain) 194 return NULL; 195 196 if (first_irq > 0) { 197 if (IS_ENABLED(CONFIG_SPARSE_IRQ)) { 198 /* attempt to allocated irq_descs */ 199 int rc = irq_alloc_descs(first_irq, first_irq, size, 200 of_node_to_nid(of_node)); 201 if (rc < 0) 202 pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n", 203 first_irq); 204 } 205 irq_domain_associate_many(domain, first_irq, 0, size); 206 } 207 208 return domain; 209 } 210 EXPORT_SYMBOL_GPL(irq_domain_add_simple); 211 212 /** 213 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain. 214 * @of_node: pointer to interrupt controller's device tree node. 215 * @size: total number of irqs in legacy mapping 216 * @first_irq: first number of irq block assigned to the domain 217 * @first_hwirq: first hwirq number to use for the translation. Should normally 218 * be '0', but a positive integer can be used if the effective 219 * hwirqs numbering does not begin at zero. 220 * @ops: map/unmap domain callbacks 221 * @host_data: Controller private data pointer 222 * 223 * Note: the map() callback will be called before this function returns 224 * for all legacy interrupts except 0 (which is always the invalid irq for 225 * a legacy controller). 226 */ 227 struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, 228 unsigned int size, 229 unsigned int first_irq, 230 irq_hw_number_t first_hwirq, 231 const struct irq_domain_ops *ops, 232 void *host_data) 233 { 234 struct irq_domain *domain; 235 236 domain = __irq_domain_add(of_node_to_fwnode(of_node), first_hwirq + size, 237 first_hwirq + size, 0, ops, host_data); 238 if (domain) 239 irq_domain_associate_many(domain, first_irq, first_hwirq, size); 240 241 return domain; 242 } 243 EXPORT_SYMBOL_GPL(irq_domain_add_legacy); 244 245 /** 246 * irq_find_matching_fwnode() - Locates a domain for a given fwnode 247 * @fwnode: FW descriptor of the interrupt controller 248 * @bus_token: domain-specific data 249 */ 250 struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, 251 enum irq_domain_bus_token bus_token) 252 { 253 struct irq_domain *h, *found = NULL; 254 int rc; 255 256 /* We might want to match the legacy controller last since 257 * it might potentially be set to match all interrupts in 258 * the absence of a device node. This isn't a problem so far 259 * yet though... 260 * 261 * bus_token == DOMAIN_BUS_ANY matches any domain, any other 262 * values must generate an exact match for the domain to be 263 * selected. 264 */ 265 mutex_lock(&irq_domain_mutex); 266 list_for_each_entry(h, &irq_domain_list, link) { 267 if (h->ops->match) 268 rc = h->ops->match(h, to_of_node(fwnode), bus_token); 269 else 270 rc = ((fwnode != NULL) && (h->fwnode == fwnode) && 271 ((bus_token == DOMAIN_BUS_ANY) || 272 (h->bus_token == bus_token))); 273 274 if (rc) { 275 found = h; 276 break; 277 } 278 } 279 mutex_unlock(&irq_domain_mutex); 280 return found; 281 } 282 EXPORT_SYMBOL_GPL(irq_find_matching_fwnode); 283 284 /** 285 * irq_set_default_host() - Set a "default" irq domain 286 * @domain: default domain pointer 287 * 288 * For convenience, it's possible to set a "default" domain that will be used 289 * whenever NULL is passed to irq_create_mapping(). It makes life easier for 290 * platforms that want to manipulate a few hard coded interrupt numbers that 291 * aren't properly represented in the device-tree. 292 */ 293 void irq_set_default_host(struct irq_domain *domain) 294 { 295 pr_debug("Default domain set to @0x%p\n", domain); 296 297 irq_default_domain = domain; 298 } 299 EXPORT_SYMBOL_GPL(irq_set_default_host); 300 301 void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq) 302 { 303 struct irq_data *irq_data = irq_get_irq_data(irq); 304 irq_hw_number_t hwirq; 305 306 if (WARN(!irq_data || irq_data->domain != domain, 307 "virq%i doesn't exist; cannot disassociate\n", irq)) 308 return; 309 310 hwirq = irq_data->hwirq; 311 irq_set_status_flags(irq, IRQ_NOREQUEST); 312 313 /* remove chip and handler */ 314 irq_set_chip_and_handler(irq, NULL, NULL); 315 316 /* Make sure it's completed */ 317 synchronize_irq(irq); 318 319 /* Tell the PIC about it */ 320 if (domain->ops->unmap) 321 domain->ops->unmap(domain, irq); 322 smp_mb(); 323 324 irq_data->domain = NULL; 325 irq_data->hwirq = 0; 326 327 /* Clear reverse map for this hwirq */ 328 if (hwirq < domain->revmap_size) { 329 domain->linear_revmap[hwirq] = 0; 330 } else { 331 mutex_lock(&revmap_trees_mutex); 332 radix_tree_delete(&domain->revmap_tree, hwirq); 333 mutex_unlock(&revmap_trees_mutex); 334 } 335 } 336 337 int irq_domain_associate(struct irq_domain *domain, unsigned int virq, 338 irq_hw_number_t hwirq) 339 { 340 struct irq_data *irq_data = irq_get_irq_data(virq); 341 int ret; 342 343 if (WARN(hwirq >= domain->hwirq_max, 344 "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name)) 345 return -EINVAL; 346 if (WARN(!irq_data, "error: virq%i is not allocated", virq)) 347 return -EINVAL; 348 if (WARN(irq_data->domain, "error: virq%i is already associated", virq)) 349 return -EINVAL; 350 351 mutex_lock(&irq_domain_mutex); 352 irq_data->hwirq = hwirq; 353 irq_data->domain = domain; 354 if (domain->ops->map) { 355 ret = domain->ops->map(domain, virq, hwirq); 356 if (ret != 0) { 357 /* 358 * If map() returns -EPERM, this interrupt is protected 359 * by the firmware or some other service and shall not 360 * be mapped. Don't bother telling the user about it. 361 */ 362 if (ret != -EPERM) { 363 pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n", 364 domain->name, hwirq, virq, ret); 365 } 366 irq_data->domain = NULL; 367 irq_data->hwirq = 0; 368 mutex_unlock(&irq_domain_mutex); 369 return ret; 370 } 371 372 /* If not already assigned, give the domain the chip's name */ 373 if (!domain->name && irq_data->chip) 374 domain->name = irq_data->chip->name; 375 } 376 377 if (hwirq < domain->revmap_size) { 378 domain->linear_revmap[hwirq] = virq; 379 } else { 380 mutex_lock(&revmap_trees_mutex); 381 radix_tree_insert(&domain->revmap_tree, hwirq, irq_data); 382 mutex_unlock(&revmap_trees_mutex); 383 } 384 mutex_unlock(&irq_domain_mutex); 385 386 irq_clear_status_flags(virq, IRQ_NOREQUEST); 387 388 return 0; 389 } 390 EXPORT_SYMBOL_GPL(irq_domain_associate); 391 392 void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base, 393 irq_hw_number_t hwirq_base, int count) 394 { 395 struct device_node *of_node; 396 int i; 397 398 of_node = irq_domain_get_of_node(domain); 399 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__, 400 of_node_full_name(of_node), irq_base, (int)hwirq_base, count); 401 402 for (i = 0; i < count; i++) { 403 irq_domain_associate(domain, irq_base + i, hwirq_base + i); 404 } 405 } 406 EXPORT_SYMBOL_GPL(irq_domain_associate_many); 407 408 /** 409 * irq_create_direct_mapping() - Allocate an irq for direct mapping 410 * @domain: domain to allocate the irq for or NULL for default domain 411 * 412 * This routine is used for irq controllers which can choose the hardware 413 * interrupt numbers they generate. In such a case it's simplest to use 414 * the linux irq as the hardware interrupt number. It still uses the linear 415 * or radix tree to store the mapping, but the irq controller can optimize 416 * the revmap path by using the hwirq directly. 417 */ 418 unsigned int irq_create_direct_mapping(struct irq_domain *domain) 419 { 420 struct device_node *of_node; 421 unsigned int virq; 422 423 if (domain == NULL) 424 domain = irq_default_domain; 425 426 of_node = irq_domain_get_of_node(domain); 427 virq = irq_alloc_desc_from(1, of_node_to_nid(of_node)); 428 if (!virq) { 429 pr_debug("create_direct virq allocation failed\n"); 430 return 0; 431 } 432 if (virq >= domain->revmap_direct_max_irq) { 433 pr_err("ERROR: no free irqs available below %i maximum\n", 434 domain->revmap_direct_max_irq); 435 irq_free_desc(virq); 436 return 0; 437 } 438 pr_debug("create_direct obtained virq %d\n", virq); 439 440 if (irq_domain_associate(domain, virq, virq)) { 441 irq_free_desc(virq); 442 return 0; 443 } 444 445 return virq; 446 } 447 EXPORT_SYMBOL_GPL(irq_create_direct_mapping); 448 449 /** 450 * irq_create_mapping() - Map a hardware interrupt into linux irq space 451 * @domain: domain owning this hardware interrupt or NULL for default domain 452 * @hwirq: hardware irq number in that domain space 453 * 454 * Only one mapping per hardware interrupt is permitted. Returns a linux 455 * irq number. 456 * If the sense/trigger is to be specified, set_irq_type() should be called 457 * on the number returned from that call. 458 */ 459 unsigned int irq_create_mapping(struct irq_domain *domain, 460 irq_hw_number_t hwirq) 461 { 462 struct device_node *of_node; 463 int virq; 464 465 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq); 466 467 /* Look for default domain if nececssary */ 468 if (domain == NULL) 469 domain = irq_default_domain; 470 if (domain == NULL) { 471 WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq); 472 return 0; 473 } 474 pr_debug("-> using domain @%p\n", domain); 475 476 of_node = irq_domain_get_of_node(domain); 477 478 /* Check if mapping already exists */ 479 virq = irq_find_mapping(domain, hwirq); 480 if (virq) { 481 pr_debug("-> existing mapping on virq %d\n", virq); 482 return virq; 483 } 484 485 /* Allocate a virtual interrupt number */ 486 virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node)); 487 if (virq <= 0) { 488 pr_debug("-> virq allocation failed\n"); 489 return 0; 490 } 491 492 if (irq_domain_associate(domain, virq, hwirq)) { 493 irq_free_desc(virq); 494 return 0; 495 } 496 497 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n", 498 hwirq, of_node_full_name(of_node), virq); 499 500 return virq; 501 } 502 EXPORT_SYMBOL_GPL(irq_create_mapping); 503 504 /** 505 * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs 506 * @domain: domain owning the interrupt range 507 * @irq_base: beginning of linux IRQ range 508 * @hwirq_base: beginning of hardware IRQ range 509 * @count: Number of interrupts to map 510 * 511 * This routine is used for allocating and mapping a range of hardware 512 * irqs to linux irqs where the linux irq numbers are at pre-defined 513 * locations. For use by controllers that already have static mappings 514 * to insert in to the domain. 515 * 516 * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time 517 * domain insertion. 518 * 519 * 0 is returned upon success, while any failure to establish a static 520 * mapping is treated as an error. 521 */ 522 int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base, 523 irq_hw_number_t hwirq_base, int count) 524 { 525 struct device_node *of_node; 526 int ret; 527 528 of_node = irq_domain_get_of_node(domain); 529 ret = irq_alloc_descs(irq_base, irq_base, count, 530 of_node_to_nid(of_node)); 531 if (unlikely(ret < 0)) 532 return ret; 533 534 irq_domain_associate_many(domain, irq_base, hwirq_base, count); 535 return 0; 536 } 537 EXPORT_SYMBOL_GPL(irq_create_strict_mappings); 538 539 static int irq_domain_translate(struct irq_domain *d, 540 struct irq_fwspec *fwspec, 541 irq_hw_number_t *hwirq, unsigned int *type) 542 { 543 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 544 if (d->ops->translate) 545 return d->ops->translate(d, fwspec, hwirq, type); 546 #endif 547 if (d->ops->xlate) 548 return d->ops->xlate(d, to_of_node(fwspec->fwnode), 549 fwspec->param, fwspec->param_count, 550 hwirq, type); 551 552 /* If domain has no translation, then we assume interrupt line */ 553 *hwirq = fwspec->param[0]; 554 return 0; 555 } 556 557 static void of_phandle_args_to_fwspec(struct of_phandle_args *irq_data, 558 struct irq_fwspec *fwspec) 559 { 560 int i; 561 562 fwspec->fwnode = irq_data->np ? &irq_data->np->fwnode : NULL; 563 fwspec->param_count = irq_data->args_count; 564 565 for (i = 0; i < irq_data->args_count; i++) 566 fwspec->param[i] = irq_data->args[i]; 567 } 568 569 unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec) 570 { 571 struct irq_domain *domain; 572 irq_hw_number_t hwirq; 573 unsigned int type = IRQ_TYPE_NONE; 574 int virq; 575 576 if (fwspec->fwnode) { 577 domain = irq_find_matching_fwnode(fwspec->fwnode, 578 DOMAIN_BUS_WIRED); 579 if (!domain) 580 domain = irq_find_matching_fwnode(fwspec->fwnode, 581 DOMAIN_BUS_ANY); 582 } else { 583 domain = irq_default_domain; 584 } 585 586 if (!domain) { 587 pr_warn("no irq domain found for %s !\n", 588 of_node_full_name(to_of_node(fwspec->fwnode))); 589 return 0; 590 } 591 592 if (irq_domain_translate(domain, fwspec, &hwirq, &type)) 593 return 0; 594 595 if (irq_domain_is_hierarchy(domain)) { 596 /* 597 * If we've already configured this interrupt, 598 * don't do it again, or hell will break loose. 599 */ 600 virq = irq_find_mapping(domain, hwirq); 601 if (virq) 602 return virq; 603 604 virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, fwspec); 605 if (virq <= 0) 606 return 0; 607 } else { 608 /* Create mapping */ 609 virq = irq_create_mapping(domain, hwirq); 610 if (!virq) 611 return virq; 612 } 613 614 /* Set type if specified and different than the current one */ 615 if (type != IRQ_TYPE_NONE && 616 type != irq_get_trigger_type(virq)) 617 irq_set_irq_type(virq, type); 618 return virq; 619 } 620 EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping); 621 622 unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data) 623 { 624 struct irq_fwspec fwspec; 625 626 of_phandle_args_to_fwspec(irq_data, &fwspec); 627 return irq_create_fwspec_mapping(&fwspec); 628 } 629 EXPORT_SYMBOL_GPL(irq_create_of_mapping); 630 631 /** 632 * irq_dispose_mapping() - Unmap an interrupt 633 * @virq: linux irq number of the interrupt to unmap 634 */ 635 void irq_dispose_mapping(unsigned int virq) 636 { 637 struct irq_data *irq_data = irq_get_irq_data(virq); 638 struct irq_domain *domain; 639 640 if (!virq || !irq_data) 641 return; 642 643 domain = irq_data->domain; 644 if (WARN_ON(domain == NULL)) 645 return; 646 647 irq_domain_disassociate(domain, virq); 648 irq_free_desc(virq); 649 } 650 EXPORT_SYMBOL_GPL(irq_dispose_mapping); 651 652 /** 653 * irq_find_mapping() - Find a linux irq from an hw irq number. 654 * @domain: domain owning this hardware interrupt 655 * @hwirq: hardware irq number in that domain space 656 */ 657 unsigned int irq_find_mapping(struct irq_domain *domain, 658 irq_hw_number_t hwirq) 659 { 660 struct irq_data *data; 661 662 /* Look for default domain if nececssary */ 663 if (domain == NULL) 664 domain = irq_default_domain; 665 if (domain == NULL) 666 return 0; 667 668 if (hwirq < domain->revmap_direct_max_irq) { 669 data = irq_domain_get_irq_data(domain, hwirq); 670 if (data && data->hwirq == hwirq) 671 return hwirq; 672 } 673 674 /* Check if the hwirq is in the linear revmap. */ 675 if (hwirq < domain->revmap_size) 676 return domain->linear_revmap[hwirq]; 677 678 rcu_read_lock(); 679 data = radix_tree_lookup(&domain->revmap_tree, hwirq); 680 rcu_read_unlock(); 681 return data ? data->irq : 0; 682 } 683 EXPORT_SYMBOL_GPL(irq_find_mapping); 684 685 #ifdef CONFIG_IRQ_DOMAIN_DEBUG 686 static int virq_debug_show(struct seq_file *m, void *private) 687 { 688 unsigned long flags; 689 struct irq_desc *desc; 690 struct irq_domain *domain; 691 struct radix_tree_iter iter; 692 void *data, **slot; 693 int i; 694 695 seq_printf(m, " %-16s %-6s %-10s %-10s %s\n", 696 "name", "mapped", "linear-max", "direct-max", "devtree-node"); 697 mutex_lock(&irq_domain_mutex); 698 list_for_each_entry(domain, &irq_domain_list, link) { 699 struct device_node *of_node; 700 int count = 0; 701 of_node = irq_domain_get_of_node(domain); 702 radix_tree_for_each_slot(slot, &domain->revmap_tree, &iter, 0) 703 count++; 704 seq_printf(m, "%c%-16s %6u %10u %10u %s\n", 705 domain == irq_default_domain ? '*' : ' ', domain->name, 706 domain->revmap_size + count, domain->revmap_size, 707 domain->revmap_direct_max_irq, 708 of_node ? of_node_full_name(of_node) : ""); 709 } 710 mutex_unlock(&irq_domain_mutex); 711 712 seq_printf(m, "%-5s %-7s %-15s %-*s %6s %-14s %s\n", "irq", "hwirq", 713 "chip name", (int)(2 * sizeof(void *) + 2), "chip data", 714 "active", "type", "domain"); 715 716 for (i = 1; i < nr_irqs; i++) { 717 desc = irq_to_desc(i); 718 if (!desc) 719 continue; 720 721 raw_spin_lock_irqsave(&desc->lock, flags); 722 domain = desc->irq_data.domain; 723 724 if (domain) { 725 struct irq_chip *chip; 726 int hwirq = desc->irq_data.hwirq; 727 bool direct; 728 729 seq_printf(m, "%5d ", i); 730 seq_printf(m, "0x%05x ", hwirq); 731 732 chip = irq_desc_get_chip(desc); 733 seq_printf(m, "%-15s ", (chip && chip->name) ? chip->name : "none"); 734 735 data = irq_desc_get_chip_data(desc); 736 seq_printf(m, data ? "0x%p " : " %p ", data); 737 738 seq_printf(m, " %c ", (desc->action && desc->action->handler) ? '*' : ' '); 739 direct = (i == hwirq) && (i < domain->revmap_direct_max_irq); 740 seq_printf(m, "%6s%-8s ", 741 (hwirq < domain->revmap_size) ? "LINEAR" : "RADIX", 742 direct ? "(DIRECT)" : ""); 743 seq_printf(m, "%s\n", desc->irq_data.domain->name); 744 } 745 746 raw_spin_unlock_irqrestore(&desc->lock, flags); 747 } 748 749 return 0; 750 } 751 752 static int virq_debug_open(struct inode *inode, struct file *file) 753 { 754 return single_open(file, virq_debug_show, inode->i_private); 755 } 756 757 static const struct file_operations virq_debug_fops = { 758 .open = virq_debug_open, 759 .read = seq_read, 760 .llseek = seq_lseek, 761 .release = single_release, 762 }; 763 764 static int __init irq_debugfs_init(void) 765 { 766 if (debugfs_create_file("irq_domain_mapping", S_IRUGO, NULL, 767 NULL, &virq_debug_fops) == NULL) 768 return -ENOMEM; 769 770 return 0; 771 } 772 __initcall(irq_debugfs_init); 773 #endif /* CONFIG_IRQ_DOMAIN_DEBUG */ 774 775 /** 776 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings 777 * 778 * Device Tree IRQ specifier translation function which works with one cell 779 * bindings where the cell value maps directly to the hwirq number. 780 */ 781 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr, 782 const u32 *intspec, unsigned int intsize, 783 unsigned long *out_hwirq, unsigned int *out_type) 784 { 785 if (WARN_ON(intsize < 1)) 786 return -EINVAL; 787 *out_hwirq = intspec[0]; 788 *out_type = IRQ_TYPE_NONE; 789 return 0; 790 } 791 EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell); 792 793 /** 794 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings 795 * 796 * Device Tree IRQ specifier translation function which works with two cell 797 * bindings where the cell values map directly to the hwirq number 798 * and linux irq flags. 799 */ 800 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr, 801 const u32 *intspec, unsigned int intsize, 802 irq_hw_number_t *out_hwirq, unsigned int *out_type) 803 { 804 if (WARN_ON(intsize < 2)) 805 return -EINVAL; 806 *out_hwirq = intspec[0]; 807 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK; 808 return 0; 809 } 810 EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell); 811 812 /** 813 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings 814 * 815 * Device Tree IRQ specifier translation function which works with either one 816 * or two cell bindings where the cell values map directly to the hwirq number 817 * and linux irq flags. 818 * 819 * Note: don't use this function unless your interrupt controller explicitly 820 * supports both one and two cell bindings. For the majority of controllers 821 * the _onecell() or _twocell() variants above should be used. 822 */ 823 int irq_domain_xlate_onetwocell(struct irq_domain *d, 824 struct device_node *ctrlr, 825 const u32 *intspec, unsigned int intsize, 826 unsigned long *out_hwirq, unsigned int *out_type) 827 { 828 if (WARN_ON(intsize < 1)) 829 return -EINVAL; 830 *out_hwirq = intspec[0]; 831 *out_type = (intsize > 1) ? intspec[1] : IRQ_TYPE_NONE; 832 return 0; 833 } 834 EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell); 835 836 const struct irq_domain_ops irq_domain_simple_ops = { 837 .xlate = irq_domain_xlate_onetwocell, 838 }; 839 EXPORT_SYMBOL_GPL(irq_domain_simple_ops); 840 841 int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq, 842 int node) 843 { 844 unsigned int hint; 845 846 if (virq >= 0) { 847 virq = irq_alloc_descs(virq, virq, cnt, node); 848 } else { 849 hint = hwirq % nr_irqs; 850 if (hint == 0) 851 hint++; 852 virq = irq_alloc_descs_from(hint, cnt, node); 853 if (virq <= 0 && hint > 1) 854 virq = irq_alloc_descs_from(1, cnt, node); 855 } 856 857 return virq; 858 } 859 860 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY 861 /** 862 * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy 863 * @parent: Parent irq domain to associate with the new domain 864 * @flags: Irq domain flags associated to the domain 865 * @size: Size of the domain. See below 866 * @fwnode: Optional fwnode of the interrupt controller 867 * @ops: Pointer to the interrupt domain callbacks 868 * @host_data: Controller private data pointer 869 * 870 * If @size is 0 a tree domain is created, otherwise a linear domain. 871 * 872 * If successful the parent is associated to the new domain and the 873 * domain flags are set. 874 * Returns pointer to IRQ domain, or NULL on failure. 875 */ 876 struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent, 877 unsigned int flags, 878 unsigned int size, 879 struct fwnode_handle *fwnode, 880 const struct irq_domain_ops *ops, 881 void *host_data) 882 { 883 struct irq_domain *domain; 884 885 if (size) 886 domain = irq_domain_create_linear(fwnode, size, ops, host_data); 887 else 888 domain = irq_domain_create_tree(fwnode, ops, host_data); 889 if (domain) { 890 domain->parent = parent; 891 domain->flags |= flags; 892 } 893 894 return domain; 895 } 896 EXPORT_SYMBOL_GPL(irq_domain_create_hierarchy); 897 898 static void irq_domain_insert_irq(int virq) 899 { 900 struct irq_data *data; 901 902 for (data = irq_get_irq_data(virq); data; data = data->parent_data) { 903 struct irq_domain *domain = data->domain; 904 irq_hw_number_t hwirq = data->hwirq; 905 906 if (hwirq < domain->revmap_size) { 907 domain->linear_revmap[hwirq] = virq; 908 } else { 909 mutex_lock(&revmap_trees_mutex); 910 radix_tree_insert(&domain->revmap_tree, hwirq, data); 911 mutex_unlock(&revmap_trees_mutex); 912 } 913 914 /* If not already assigned, give the domain the chip's name */ 915 if (!domain->name && data->chip) 916 domain->name = data->chip->name; 917 } 918 919 irq_clear_status_flags(virq, IRQ_NOREQUEST); 920 } 921 922 static void irq_domain_remove_irq(int virq) 923 { 924 struct irq_data *data; 925 926 irq_set_status_flags(virq, IRQ_NOREQUEST); 927 irq_set_chip_and_handler(virq, NULL, NULL); 928 synchronize_irq(virq); 929 smp_mb(); 930 931 for (data = irq_get_irq_data(virq); data; data = data->parent_data) { 932 struct irq_domain *domain = data->domain; 933 irq_hw_number_t hwirq = data->hwirq; 934 935 if (hwirq < domain->revmap_size) { 936 domain->linear_revmap[hwirq] = 0; 937 } else { 938 mutex_lock(&revmap_trees_mutex); 939 radix_tree_delete(&domain->revmap_tree, hwirq); 940 mutex_unlock(&revmap_trees_mutex); 941 } 942 } 943 } 944 945 static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain, 946 struct irq_data *child) 947 { 948 struct irq_data *irq_data; 949 950 irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL, 951 irq_data_get_node(child)); 952 if (irq_data) { 953 child->parent_data = irq_data; 954 irq_data->irq = child->irq; 955 irq_data->common = child->common; 956 irq_data->domain = domain; 957 } 958 959 return irq_data; 960 } 961 962 static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs) 963 { 964 struct irq_data *irq_data, *tmp; 965 int i; 966 967 for (i = 0; i < nr_irqs; i++) { 968 irq_data = irq_get_irq_data(virq + i); 969 tmp = irq_data->parent_data; 970 irq_data->parent_data = NULL; 971 irq_data->domain = NULL; 972 973 while (tmp) { 974 irq_data = tmp; 975 tmp = tmp->parent_data; 976 kfree(irq_data); 977 } 978 } 979 } 980 981 static int irq_domain_alloc_irq_data(struct irq_domain *domain, 982 unsigned int virq, unsigned int nr_irqs) 983 { 984 struct irq_data *irq_data; 985 struct irq_domain *parent; 986 int i; 987 988 /* The outermost irq_data is embedded in struct irq_desc */ 989 for (i = 0; i < nr_irqs; i++) { 990 irq_data = irq_get_irq_data(virq + i); 991 irq_data->domain = domain; 992 993 for (parent = domain->parent; parent; parent = parent->parent) { 994 irq_data = irq_domain_insert_irq_data(parent, irq_data); 995 if (!irq_data) { 996 irq_domain_free_irq_data(virq, i + 1); 997 return -ENOMEM; 998 } 999 } 1000 } 1001 1002 return 0; 1003 } 1004 1005 /** 1006 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain 1007 * @domain: domain to match 1008 * @virq: IRQ number to get irq_data 1009 */ 1010 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, 1011 unsigned int virq) 1012 { 1013 struct irq_data *irq_data; 1014 1015 for (irq_data = irq_get_irq_data(virq); irq_data; 1016 irq_data = irq_data->parent_data) 1017 if (irq_data->domain == domain) 1018 return irq_data; 1019 1020 return NULL; 1021 } 1022 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data); 1023 1024 /** 1025 * irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain 1026 * @domain: Interrupt domain to match 1027 * @virq: IRQ number 1028 * @hwirq: The hwirq number 1029 * @chip: The associated interrupt chip 1030 * @chip_data: The associated chip data 1031 */ 1032 int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq, 1033 irq_hw_number_t hwirq, struct irq_chip *chip, 1034 void *chip_data) 1035 { 1036 struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq); 1037 1038 if (!irq_data) 1039 return -ENOENT; 1040 1041 irq_data->hwirq = hwirq; 1042 irq_data->chip = chip ? chip : &no_irq_chip; 1043 irq_data->chip_data = chip_data; 1044 1045 return 0; 1046 } 1047 EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip); 1048 1049 /** 1050 * irq_domain_set_info - Set the complete data for a @virq in @domain 1051 * @domain: Interrupt domain to match 1052 * @virq: IRQ number 1053 * @hwirq: The hardware interrupt number 1054 * @chip: The associated interrupt chip 1055 * @chip_data: The associated interrupt chip data 1056 * @handler: The interrupt flow handler 1057 * @handler_data: The interrupt flow handler data 1058 * @handler_name: The interrupt handler name 1059 */ 1060 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, 1061 irq_hw_number_t hwirq, struct irq_chip *chip, 1062 void *chip_data, irq_flow_handler_t handler, 1063 void *handler_data, const char *handler_name) 1064 { 1065 irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data); 1066 __irq_set_handler(virq, handler, 0, handler_name); 1067 irq_set_handler_data(virq, handler_data); 1068 } 1069 EXPORT_SYMBOL(irq_domain_set_info); 1070 1071 /** 1072 * irq_domain_reset_irq_data - Clear hwirq, chip and chip_data in @irq_data 1073 * @irq_data: The pointer to irq_data 1074 */ 1075 void irq_domain_reset_irq_data(struct irq_data *irq_data) 1076 { 1077 irq_data->hwirq = 0; 1078 irq_data->chip = &no_irq_chip; 1079 irq_data->chip_data = NULL; 1080 } 1081 EXPORT_SYMBOL_GPL(irq_domain_reset_irq_data); 1082 1083 /** 1084 * irq_domain_free_irqs_common - Clear irq_data and free the parent 1085 * @domain: Interrupt domain to match 1086 * @virq: IRQ number to start with 1087 * @nr_irqs: The number of irqs to free 1088 */ 1089 void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq, 1090 unsigned int nr_irqs) 1091 { 1092 struct irq_data *irq_data; 1093 int i; 1094 1095 for (i = 0; i < nr_irqs; i++) { 1096 irq_data = irq_domain_get_irq_data(domain, virq + i); 1097 if (irq_data) 1098 irq_domain_reset_irq_data(irq_data); 1099 } 1100 irq_domain_free_irqs_parent(domain, virq, nr_irqs); 1101 } 1102 1103 /** 1104 * irq_domain_free_irqs_top - Clear handler and handler data, clear irqdata and free parent 1105 * @domain: Interrupt domain to match 1106 * @virq: IRQ number to start with 1107 * @nr_irqs: The number of irqs to free 1108 */ 1109 void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq, 1110 unsigned int nr_irqs) 1111 { 1112 int i; 1113 1114 for (i = 0; i < nr_irqs; i++) { 1115 irq_set_handler_data(virq + i, NULL); 1116 irq_set_handler(virq + i, NULL); 1117 } 1118 irq_domain_free_irqs_common(domain, virq, nr_irqs); 1119 } 1120 1121 static bool irq_domain_is_auto_recursive(struct irq_domain *domain) 1122 { 1123 return domain->flags & IRQ_DOMAIN_FLAG_AUTO_RECURSIVE; 1124 } 1125 1126 static void irq_domain_free_irqs_recursive(struct irq_domain *domain, 1127 unsigned int irq_base, 1128 unsigned int nr_irqs) 1129 { 1130 domain->ops->free(domain, irq_base, nr_irqs); 1131 if (irq_domain_is_auto_recursive(domain)) { 1132 BUG_ON(!domain->parent); 1133 irq_domain_free_irqs_recursive(domain->parent, irq_base, 1134 nr_irqs); 1135 } 1136 } 1137 1138 int irq_domain_alloc_irqs_recursive(struct irq_domain *domain, 1139 unsigned int irq_base, 1140 unsigned int nr_irqs, void *arg) 1141 { 1142 int ret = 0; 1143 struct irq_domain *parent = domain->parent; 1144 bool recursive = irq_domain_is_auto_recursive(domain); 1145 1146 BUG_ON(recursive && !parent); 1147 if (recursive) 1148 ret = irq_domain_alloc_irqs_recursive(parent, irq_base, 1149 nr_irqs, arg); 1150 if (ret >= 0) 1151 ret = domain->ops->alloc(domain, irq_base, nr_irqs, arg); 1152 if (ret < 0 && recursive) 1153 irq_domain_free_irqs_recursive(parent, irq_base, nr_irqs); 1154 1155 return ret; 1156 } 1157 1158 /** 1159 * __irq_domain_alloc_irqs - Allocate IRQs from domain 1160 * @domain: domain to allocate from 1161 * @irq_base: allocate specified IRQ nubmer if irq_base >= 0 1162 * @nr_irqs: number of IRQs to allocate 1163 * @node: NUMA node id for memory allocation 1164 * @arg: domain specific argument 1165 * @realloc: IRQ descriptors have already been allocated if true 1166 * 1167 * Allocate IRQ numbers and initialized all data structures to support 1168 * hierarchy IRQ domains. 1169 * Parameter @realloc is mainly to support legacy IRQs. 1170 * Returns error code or allocated IRQ number 1171 * 1172 * The whole process to setup an IRQ has been split into two steps. 1173 * The first step, __irq_domain_alloc_irqs(), is to allocate IRQ 1174 * descriptor and required hardware resources. The second step, 1175 * irq_domain_activate_irq(), is to program hardwares with preallocated 1176 * resources. In this way, it's easier to rollback when failing to 1177 * allocate resources. 1178 */ 1179 int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, 1180 unsigned int nr_irqs, int node, void *arg, 1181 bool realloc) 1182 { 1183 int i, ret, virq; 1184 1185 if (domain == NULL) { 1186 domain = irq_default_domain; 1187 if (WARN(!domain, "domain is NULL; cannot allocate IRQ\n")) 1188 return -EINVAL; 1189 } 1190 1191 if (!domain->ops->alloc) { 1192 pr_debug("domain->ops->alloc() is NULL\n"); 1193 return -ENOSYS; 1194 } 1195 1196 if (realloc && irq_base >= 0) { 1197 virq = irq_base; 1198 } else { 1199 virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node); 1200 if (virq < 0) { 1201 pr_debug("cannot allocate IRQ(base %d, count %d)\n", 1202 irq_base, nr_irqs); 1203 return virq; 1204 } 1205 } 1206 1207 if (irq_domain_alloc_irq_data(domain, virq, nr_irqs)) { 1208 pr_debug("cannot allocate memory for IRQ%d\n", virq); 1209 ret = -ENOMEM; 1210 goto out_free_desc; 1211 } 1212 1213 mutex_lock(&irq_domain_mutex); 1214 ret = irq_domain_alloc_irqs_recursive(domain, virq, nr_irqs, arg); 1215 if (ret < 0) { 1216 mutex_unlock(&irq_domain_mutex); 1217 goto out_free_irq_data; 1218 } 1219 for (i = 0; i < nr_irqs; i++) 1220 irq_domain_insert_irq(virq + i); 1221 mutex_unlock(&irq_domain_mutex); 1222 1223 return virq; 1224 1225 out_free_irq_data: 1226 irq_domain_free_irq_data(virq, nr_irqs); 1227 out_free_desc: 1228 irq_free_descs(virq, nr_irqs); 1229 return ret; 1230 } 1231 1232 /** 1233 * irq_domain_free_irqs - Free IRQ number and associated data structures 1234 * @virq: base IRQ number 1235 * @nr_irqs: number of IRQs to free 1236 */ 1237 void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs) 1238 { 1239 struct irq_data *data = irq_get_irq_data(virq); 1240 int i; 1241 1242 if (WARN(!data || !data->domain || !data->domain->ops->free, 1243 "NULL pointer, cannot free irq\n")) 1244 return; 1245 1246 mutex_lock(&irq_domain_mutex); 1247 for (i = 0; i < nr_irqs; i++) 1248 irq_domain_remove_irq(virq + i); 1249 irq_domain_free_irqs_recursive(data->domain, virq, nr_irqs); 1250 mutex_unlock(&irq_domain_mutex); 1251 1252 irq_domain_free_irq_data(virq, nr_irqs); 1253 irq_free_descs(virq, nr_irqs); 1254 } 1255 1256 /** 1257 * irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain 1258 * @irq_base: Base IRQ number 1259 * @nr_irqs: Number of IRQs to allocate 1260 * @arg: Allocation data (arch/domain specific) 1261 * 1262 * Check whether the domain has been setup recursive. If not allocate 1263 * through the parent domain. 1264 */ 1265 int irq_domain_alloc_irqs_parent(struct irq_domain *domain, 1266 unsigned int irq_base, unsigned int nr_irqs, 1267 void *arg) 1268 { 1269 /* irq_domain_alloc_irqs_recursive() has called parent's alloc() */ 1270 if (irq_domain_is_auto_recursive(domain)) 1271 return 0; 1272 1273 domain = domain->parent; 1274 if (domain) 1275 return irq_domain_alloc_irqs_recursive(domain, irq_base, 1276 nr_irqs, arg); 1277 return -ENOSYS; 1278 } 1279 EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent); 1280 1281 /** 1282 * irq_domain_free_irqs_parent - Free interrupts from parent domain 1283 * @irq_base: Base IRQ number 1284 * @nr_irqs: Number of IRQs to free 1285 * 1286 * Check whether the domain has been setup recursive. If not free 1287 * through the parent domain. 1288 */ 1289 void irq_domain_free_irqs_parent(struct irq_domain *domain, 1290 unsigned int irq_base, unsigned int nr_irqs) 1291 { 1292 /* irq_domain_free_irqs_recursive() will call parent's free */ 1293 if (!irq_domain_is_auto_recursive(domain) && domain->parent) 1294 irq_domain_free_irqs_recursive(domain->parent, irq_base, 1295 nr_irqs); 1296 } 1297 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent); 1298 1299 /** 1300 * irq_domain_activate_irq - Call domain_ops->activate recursively to activate 1301 * interrupt 1302 * @irq_data: outermost irq_data associated with interrupt 1303 * 1304 * This is the second step to call domain_ops->activate to program interrupt 1305 * controllers, so the interrupt could actually get delivered. 1306 */ 1307 void irq_domain_activate_irq(struct irq_data *irq_data) 1308 { 1309 if (irq_data && irq_data->domain) { 1310 struct irq_domain *domain = irq_data->domain; 1311 1312 if (irq_data->parent_data) 1313 irq_domain_activate_irq(irq_data->parent_data); 1314 if (domain->ops->activate) 1315 domain->ops->activate(domain, irq_data); 1316 } 1317 } 1318 1319 /** 1320 * irq_domain_deactivate_irq - Call domain_ops->deactivate recursively to 1321 * deactivate interrupt 1322 * @irq_data: outermost irq_data associated with interrupt 1323 * 1324 * It calls domain_ops->deactivate to program interrupt controllers to disable 1325 * interrupt delivery. 1326 */ 1327 void irq_domain_deactivate_irq(struct irq_data *irq_data) 1328 { 1329 if (irq_data && irq_data->domain) { 1330 struct irq_domain *domain = irq_data->domain; 1331 1332 if (domain->ops->deactivate) 1333 domain->ops->deactivate(domain, irq_data); 1334 if (irq_data->parent_data) 1335 irq_domain_deactivate_irq(irq_data->parent_data); 1336 } 1337 } 1338 1339 static void irq_domain_check_hierarchy(struct irq_domain *domain) 1340 { 1341 /* Hierarchy irq_domains must implement callback alloc() */ 1342 if (domain->ops->alloc) 1343 domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY; 1344 } 1345 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 1346 /** 1347 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain 1348 * @domain: domain to match 1349 * @virq: IRQ number to get irq_data 1350 */ 1351 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, 1352 unsigned int virq) 1353 { 1354 struct irq_data *irq_data = irq_get_irq_data(virq); 1355 1356 return (irq_data && irq_data->domain == domain) ? irq_data : NULL; 1357 } 1358 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data); 1359 1360 /** 1361 * irq_domain_set_info - Set the complete data for a @virq in @domain 1362 * @domain: Interrupt domain to match 1363 * @virq: IRQ number 1364 * @hwirq: The hardware interrupt number 1365 * @chip: The associated interrupt chip 1366 * @chip_data: The associated interrupt chip data 1367 * @handler: The interrupt flow handler 1368 * @handler_data: The interrupt flow handler data 1369 * @handler_name: The interrupt handler name 1370 */ 1371 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, 1372 irq_hw_number_t hwirq, struct irq_chip *chip, 1373 void *chip_data, irq_flow_handler_t handler, 1374 void *handler_data, const char *handler_name) 1375 { 1376 irq_set_chip_and_handler_name(virq, chip, handler, handler_name); 1377 irq_set_chip_data(virq, chip_data); 1378 irq_set_handler_data(virq, handler_data); 1379 } 1380 1381 static void irq_domain_check_hierarchy(struct irq_domain *domain) 1382 { 1383 } 1384 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */ 1385