1 // SPDX-License-Identifier: GPL-2.0
3 #define pr_fmt(fmt) "irq: " fmt
5 #include <linux/acpi.h>
6 #include <linux/debugfs.h>
7 #include <linux/hardirq.h>
8 #include <linux/interrupt.h>
10 #include <linux/irqdesc.h>
11 #include <linux/irqdomain.h>
12 #include <linux/module.h>
13 #include <linux/mutex.h>
15 #include <linux/of_address.h>
16 #include <linux/of_irq.h>
17 #include <linux/topology.h>
18 #include <linux/seq_file.h>
19 #include <linux/slab.h>
20 #include <linux/smp.h>
23 static LIST_HEAD(irq_domain_list);
24 static DEFINE_MUTEX(irq_domain_mutex);
26 static struct irq_domain *irq_default_domain;
28 static void irq_domain_check_hierarchy(struct irq_domain *domain);
31 struct fwnode_handle fwnode;
37 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
38 static void debugfs_add_domain_dir(struct irq_domain *d);
39 static void debugfs_remove_domain_dir(struct irq_domain *d);
41 static inline void debugfs_add_domain_dir(struct irq_domain *d) { }
42 static inline void debugfs_remove_domain_dir(struct irq_domain *d) { }
45 const struct fwnode_operations irqchip_fwnode_ops;
46 EXPORT_SYMBOL_GPL(irqchip_fwnode_ops);
49 * irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for
50 * identifying an irq domain
51 * @type: Type of irqchip_fwnode. See linux/irqdomain.h
52 * @name: Optional user provided domain name
53 * @id: Optional user provided id if name != NULL
54 * @data: Optional user-provided data
56 * Allocate a struct irqchip_fwid, and return a poiner to the embedded
57 * fwnode_handle (or NULL on failure).
59 * Note: The types IRQCHIP_FWNODE_NAMED and IRQCHIP_FWNODE_NAMED_ID are
60 * solely to transport name information to irqdomain creation code. The
61 * node is not stored. For other types the pointer is kept in the irq
64 struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
65 const char *name, void *data)
67 struct irqchip_fwid *fwid;
70 fwid = kzalloc(sizeof(*fwid), GFP_KERNEL);
73 case IRQCHIP_FWNODE_NAMED:
74 n = kasprintf(GFP_KERNEL, "%s", name);
76 case IRQCHIP_FWNODE_NAMED_ID:
77 n = kasprintf(GFP_KERNEL, "%s-%d", name, id);
80 n = kasprintf(GFP_KERNEL, "irqchip@%p", data);
93 fwid->fwnode.ops = &irqchip_fwnode_ops;
96 EXPORT_SYMBOL_GPL(__irq_domain_alloc_fwnode);
99 * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle
101 * Free a fwnode_handle allocated with irq_domain_alloc_fwnode.
103 void irq_domain_free_fwnode(struct fwnode_handle *fwnode)
105 struct irqchip_fwid *fwid;
107 if (WARN_ON(!is_fwnode_irqchip(fwnode)))
110 fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
114 EXPORT_SYMBOL_GPL(irq_domain_free_fwnode);
117 * __irq_domain_add() - Allocate a new irq_domain data structure
118 * @fwnode: firmware node for the interrupt controller
119 * @size: Size of linear map; 0 for radix mapping only
120 * @hwirq_max: Maximum number of interrupts supported by controller
121 * @direct_max: Maximum value of direct maps; Use ~0 for no limit; 0 for no
123 * @ops: domain callbacks
124 * @host_data: Controller private data pointer
126 * Allocates and initializes an irq_domain structure.
127 * Returns pointer to IRQ domain, or NULL on failure.
129 struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
130 irq_hw_number_t hwirq_max, int direct_max,
131 const struct irq_domain_ops *ops,
134 struct device_node *of_node = to_of_node(fwnode);
135 struct irqchip_fwid *fwid;
136 struct irq_domain *domain;
138 static atomic_t unknown_domains;
140 domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size),
141 GFP_KERNEL, of_node_to_nid(of_node));
145 if (fwnode && is_fwnode_irqchip(fwnode)) {
146 fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
148 switch (fwid->type) {
149 case IRQCHIP_FWNODE_NAMED:
150 case IRQCHIP_FWNODE_NAMED_ID:
151 domain->name = kstrdup(fwid->name, GFP_KERNEL);
156 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
159 domain->fwnode = fwnode;
160 domain->name = fwid->name;
164 } else if (is_acpi_device_node(fwnode)) {
165 struct acpi_buffer buf = {
166 .length = ACPI_ALLOCATE_BUFFER,
170 handle = acpi_device_handle(to_acpi_device_node(fwnode));
171 if (acpi_get_name(handle, ACPI_FULL_PATHNAME, &buf) == AE_OK) {
172 domain->name = buf.pointer;
173 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
176 domain->fwnode = fwnode;
178 } else if (of_node) {
182 * DT paths contain '/', which debugfs is legitimately
183 * unhappy about. Replace them with ':', which does
184 * the trick and is not as offensive as '\'...
186 name = kasprintf(GFP_KERNEL, "%pOF", of_node);
192 strreplace(name, '/', ':');
195 domain->fwnode = fwnode;
196 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
201 pr_err("Invalid fwnode type for irqdomain\n");
202 domain->name = kasprintf(GFP_KERNEL, "unknown-%d",
203 atomic_inc_return(&unknown_domains));
208 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
211 of_node_get(of_node);
214 INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
215 mutex_init(&domain->revmap_tree_mutex);
217 domain->host_data = host_data;
218 domain->hwirq_max = hwirq_max;
219 domain->revmap_size = size;
220 domain->revmap_direct_max_irq = direct_max;
221 irq_domain_check_hierarchy(domain);
223 mutex_lock(&irq_domain_mutex);
224 debugfs_add_domain_dir(domain);
225 list_add(&domain->link, &irq_domain_list);
226 mutex_unlock(&irq_domain_mutex);
228 pr_debug("Added domain %s\n", domain->name);
231 EXPORT_SYMBOL_GPL(__irq_domain_add);
234 * irq_domain_remove() - Remove an irq domain.
235 * @domain: domain to remove
237 * This routine is used to remove an irq domain. The caller must ensure
238 * that all mappings within the domain have been disposed of prior to
239 * use, depending on the revmap type.
241 void irq_domain_remove(struct irq_domain *domain)
243 mutex_lock(&irq_domain_mutex);
244 debugfs_remove_domain_dir(domain);
246 WARN_ON(!radix_tree_empty(&domain->revmap_tree));
248 list_del(&domain->link);
251 * If the going away domain is the default one, reset it.
253 if (unlikely(irq_default_domain == domain))
254 irq_set_default_host(NULL);
256 mutex_unlock(&irq_domain_mutex);
258 pr_debug("Removed domain %s\n", domain->name);
260 of_node_put(irq_domain_get_of_node(domain));
261 if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
265 EXPORT_SYMBOL_GPL(irq_domain_remove);
267 void irq_domain_update_bus_token(struct irq_domain *domain,
268 enum irq_domain_bus_token bus_token)
272 if (domain->bus_token == bus_token)
275 mutex_lock(&irq_domain_mutex);
277 domain->bus_token = bus_token;
279 name = kasprintf(GFP_KERNEL, "%s-%d", domain->name, bus_token);
281 mutex_unlock(&irq_domain_mutex);
285 debugfs_remove_domain_dir(domain);
287 if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
290 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
293 debugfs_add_domain_dir(domain);
295 mutex_unlock(&irq_domain_mutex);
299 * irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs
300 * @of_node: pointer to interrupt controller's device tree node.
301 * @size: total number of irqs in mapping
302 * @first_irq: first number of irq block assigned to the domain,
303 * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then
304 * pre-map all of the irqs in the domain to virqs starting at first_irq.
305 * @ops: domain callbacks
306 * @host_data: Controller private data pointer
308 * Allocates an irq_domain, and optionally if first_irq is positive then also
309 * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq.
311 * This is intended to implement the expected behaviour for most
312 * interrupt controllers. If device tree is used, then first_irq will be 0 and
313 * irqs get mapped dynamically on the fly. However, if the controller requires
314 * static virq assignments (non-DT boot) then it will set that up correctly.
316 struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
318 unsigned int first_irq,
319 const struct irq_domain_ops *ops,
322 struct irq_domain *domain;
324 domain = __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data);
329 if (IS_ENABLED(CONFIG_SPARSE_IRQ)) {
330 /* attempt to allocated irq_descs */
331 int rc = irq_alloc_descs(first_irq, first_irq, size,
332 of_node_to_nid(of_node));
334 pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
337 irq_domain_associate_many(domain, first_irq, 0, size);
342 EXPORT_SYMBOL_GPL(irq_domain_add_simple);
345 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain.
346 * @of_node: pointer to interrupt controller's device tree node.
347 * @size: total number of irqs in legacy mapping
348 * @first_irq: first number of irq block assigned to the domain
349 * @first_hwirq: first hwirq number to use for the translation. Should normally
350 * be '0', but a positive integer can be used if the effective
351 * hwirqs numbering does not begin at zero.
352 * @ops: map/unmap domain callbacks
353 * @host_data: Controller private data pointer
355 * Note: the map() callback will be called before this function returns
356 * for all legacy interrupts except 0 (which is always the invalid irq for
357 * a legacy controller).
359 struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
361 unsigned int first_irq,
362 irq_hw_number_t first_hwirq,
363 const struct irq_domain_ops *ops,
366 struct irq_domain *domain;
368 domain = __irq_domain_add(of_node_to_fwnode(of_node), first_hwirq + size,
369 first_hwirq + size, 0, ops, host_data);
371 irq_domain_associate_many(domain, first_irq, first_hwirq, size);
375 EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
378 * irq_find_matching_fwspec() - Locates a domain for a given fwspec
379 * @fwspec: FW specifier for an interrupt
380 * @bus_token: domain-specific data
382 struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
383 enum irq_domain_bus_token bus_token)
385 struct irq_domain *h, *found = NULL;
386 struct fwnode_handle *fwnode = fwspec->fwnode;
389 /* We might want to match the legacy controller last since
390 * it might potentially be set to match all interrupts in
391 * the absence of a device node. This isn't a problem so far
394 * bus_token == DOMAIN_BUS_ANY matches any domain, any other
395 * values must generate an exact match for the domain to be
398 mutex_lock(&irq_domain_mutex);
399 list_for_each_entry(h, &irq_domain_list, link) {
400 if (h->ops->select && fwspec->param_count)
401 rc = h->ops->select(h, fwspec, bus_token);
402 else if (h->ops->match)
403 rc = h->ops->match(h, to_of_node(fwnode), bus_token);
405 rc = ((fwnode != NULL) && (h->fwnode == fwnode) &&
406 ((bus_token == DOMAIN_BUS_ANY) ||
407 (h->bus_token == bus_token)));
414 mutex_unlock(&irq_domain_mutex);
417 EXPORT_SYMBOL_GPL(irq_find_matching_fwspec);
420 * irq_domain_check_msi_remap - Check whether all MSI irq domains implement
423 * Return: false if any MSI irq domain does not support IRQ remapping,
424 * true otherwise (including if there is no MSI irq domain)
426 bool irq_domain_check_msi_remap(void)
428 struct irq_domain *h;
431 mutex_lock(&irq_domain_mutex);
432 list_for_each_entry(h, &irq_domain_list, link) {
433 if (irq_domain_is_msi(h) &&
434 !irq_domain_hierarchical_is_msi_remap(h)) {
439 mutex_unlock(&irq_domain_mutex);
442 EXPORT_SYMBOL_GPL(irq_domain_check_msi_remap);
445 * irq_set_default_host() - Set a "default" irq domain
446 * @domain: default domain pointer
448 * For convenience, it's possible to set a "default" domain that will be used
449 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
450 * platforms that want to manipulate a few hard coded interrupt numbers that
451 * aren't properly represented in the device-tree.
453 void irq_set_default_host(struct irq_domain *domain)
455 pr_debug("Default domain set to @0x%p\n", domain);
457 irq_default_domain = domain;
459 EXPORT_SYMBOL_GPL(irq_set_default_host);
462 * irq_get_default_host() - Retrieve the "default" irq domain
464 * Returns: the default domain, if any.
466 * Modern code should never use this. This should only be used on
467 * systems that cannot implement a firmware->fwnode mapping (which
468 * both DT and ACPI provide).
470 struct irq_domain *irq_get_default_host(void)
472 return irq_default_domain;
475 static void irq_domain_clear_mapping(struct irq_domain *domain,
476 irq_hw_number_t hwirq)
478 if (hwirq < domain->revmap_size) {
479 domain->linear_revmap[hwirq] = 0;
481 mutex_lock(&domain->revmap_tree_mutex);
482 radix_tree_delete(&domain->revmap_tree, hwirq);
483 mutex_unlock(&domain->revmap_tree_mutex);
487 static void irq_domain_set_mapping(struct irq_domain *domain,
488 irq_hw_number_t hwirq,
489 struct irq_data *irq_data)
491 if (hwirq < domain->revmap_size) {
492 domain->linear_revmap[hwirq] = irq_data->irq;
494 mutex_lock(&domain->revmap_tree_mutex);
495 radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
496 mutex_unlock(&domain->revmap_tree_mutex);
500 void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
502 struct irq_data *irq_data = irq_get_irq_data(irq);
503 irq_hw_number_t hwirq;
505 if (WARN(!irq_data || irq_data->domain != domain,
506 "virq%i doesn't exist; cannot disassociate\n", irq))
509 hwirq = irq_data->hwirq;
510 irq_set_status_flags(irq, IRQ_NOREQUEST);
512 /* remove chip and handler */
513 irq_set_chip_and_handler(irq, NULL, NULL);
515 /* Make sure it's completed */
516 synchronize_irq(irq);
518 /* Tell the PIC about it */
519 if (domain->ops->unmap)
520 domain->ops->unmap(domain, irq);
523 irq_data->domain = NULL;
527 /* Clear reverse map for this hwirq */
528 irq_domain_clear_mapping(domain, hwirq);
531 int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
532 irq_hw_number_t hwirq)
534 struct irq_data *irq_data = irq_get_irq_data(virq);
537 if (WARN(hwirq >= domain->hwirq_max,
538 "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name))
540 if (WARN(!irq_data, "error: virq%i is not allocated", virq))
542 if (WARN(irq_data->domain, "error: virq%i is already associated", virq))
545 mutex_lock(&irq_domain_mutex);
546 irq_data->hwirq = hwirq;
547 irq_data->domain = domain;
548 if (domain->ops->map) {
549 ret = domain->ops->map(domain, virq, hwirq);
552 * If map() returns -EPERM, this interrupt is protected
553 * by the firmware or some other service and shall not
554 * be mapped. Don't bother telling the user about it.
557 pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n",
558 domain->name, hwirq, virq, ret);
560 irq_data->domain = NULL;
562 mutex_unlock(&irq_domain_mutex);
566 /* If not already assigned, give the domain the chip's name */
567 if (!domain->name && irq_data->chip)
568 domain->name = irq_data->chip->name;
572 irq_domain_set_mapping(domain, hwirq, irq_data);
573 mutex_unlock(&irq_domain_mutex);
575 irq_clear_status_flags(virq, IRQ_NOREQUEST);
579 EXPORT_SYMBOL_GPL(irq_domain_associate);
581 void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
582 irq_hw_number_t hwirq_base, int count)
584 struct device_node *of_node;
587 of_node = irq_domain_get_of_node(domain);
588 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
589 of_node_full_name(of_node), irq_base, (int)hwirq_base, count);
591 for (i = 0; i < count; i++) {
592 irq_domain_associate(domain, irq_base + i, hwirq_base + i);
595 EXPORT_SYMBOL_GPL(irq_domain_associate_many);
598 * irq_create_direct_mapping() - Allocate an irq for direct mapping
599 * @domain: domain to allocate the irq for or NULL for default domain
601 * This routine is used for irq controllers which can choose the hardware
602 * interrupt numbers they generate. In such a case it's simplest to use
603 * the linux irq as the hardware interrupt number. It still uses the linear
604 * or radix tree to store the mapping, but the irq controller can optimize
605 * the revmap path by using the hwirq directly.
607 unsigned int irq_create_direct_mapping(struct irq_domain *domain)
609 struct device_node *of_node;
613 domain = irq_default_domain;
615 of_node = irq_domain_get_of_node(domain);
616 virq = irq_alloc_desc_from(1, of_node_to_nid(of_node));
618 pr_debug("create_direct virq allocation failed\n");
621 if (virq >= domain->revmap_direct_max_irq) {
622 pr_err("ERROR: no free irqs available below %i maximum\n",
623 domain->revmap_direct_max_irq);
627 pr_debug("create_direct obtained virq %d\n", virq);
629 if (irq_domain_associate(domain, virq, virq)) {
636 EXPORT_SYMBOL_GPL(irq_create_direct_mapping);
639 * irq_create_mapping() - Map a hardware interrupt into linux irq space
640 * @domain: domain owning this hardware interrupt or NULL for default domain
641 * @hwirq: hardware irq number in that domain space
643 * Only one mapping per hardware interrupt is permitted. Returns a linux
645 * If the sense/trigger is to be specified, set_irq_type() should be called
646 * on the number returned from that call.
648 unsigned int irq_create_mapping(struct irq_domain *domain,
649 irq_hw_number_t hwirq)
651 struct device_node *of_node;
654 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
656 /* Look for default domain if nececssary */
658 domain = irq_default_domain;
659 if (domain == NULL) {
660 WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq);
663 pr_debug("-> using domain @%p\n", domain);
665 of_node = irq_domain_get_of_node(domain);
667 /* Check if mapping already exists */
668 virq = irq_find_mapping(domain, hwirq);
670 pr_debug("-> existing mapping on virq %d\n", virq);
674 /* Allocate a virtual interrupt number */
675 virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node), NULL);
677 pr_debug("-> virq allocation failed\n");
681 if (irq_domain_associate(domain, virq, hwirq)) {
686 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
687 hwirq, of_node_full_name(of_node), virq);
691 EXPORT_SYMBOL_GPL(irq_create_mapping);
694 * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs
695 * @domain: domain owning the interrupt range
696 * @irq_base: beginning of linux IRQ range
697 * @hwirq_base: beginning of hardware IRQ range
698 * @count: Number of interrupts to map
700 * This routine is used for allocating and mapping a range of hardware
701 * irqs to linux irqs where the linux irq numbers are at pre-defined
702 * locations. For use by controllers that already have static mappings
703 * to insert in to the domain.
705 * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time
708 * 0 is returned upon success, while any failure to establish a static
709 * mapping is treated as an error.
711 int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base,
712 irq_hw_number_t hwirq_base, int count)
714 struct device_node *of_node;
717 of_node = irq_domain_get_of_node(domain);
718 ret = irq_alloc_descs(irq_base, irq_base, count,
719 of_node_to_nid(of_node));
720 if (unlikely(ret < 0))
723 irq_domain_associate_many(domain, irq_base, hwirq_base, count);
726 EXPORT_SYMBOL_GPL(irq_create_strict_mappings);
728 static int irq_domain_translate(struct irq_domain *d,
729 struct irq_fwspec *fwspec,
730 irq_hw_number_t *hwirq, unsigned int *type)
732 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
733 if (d->ops->translate)
734 return d->ops->translate(d, fwspec, hwirq, type);
737 return d->ops->xlate(d, to_of_node(fwspec->fwnode),
738 fwspec->param, fwspec->param_count,
741 /* If domain has no translation, then we assume interrupt line */
742 *hwirq = fwspec->param[0];
746 static void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,
748 struct irq_fwspec *fwspec)
752 fwspec->fwnode = np ? &np->fwnode : NULL;
753 fwspec->param_count = count;
755 for (i = 0; i < count; i++)
756 fwspec->param[i] = args[i];
759 unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
761 struct irq_domain *domain;
762 struct irq_data *irq_data;
763 irq_hw_number_t hwirq;
764 unsigned int type = IRQ_TYPE_NONE;
767 if (fwspec->fwnode) {
768 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_WIRED);
770 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_ANY);
772 domain = irq_default_domain;
776 pr_warn("no irq domain found for %s !\n",
777 of_node_full_name(to_of_node(fwspec->fwnode)));
781 if (irq_domain_translate(domain, fwspec, &hwirq, &type))
785 * WARN if the irqchip returns a type with bits
786 * outside the sense mask set and clear these bits.
788 if (WARN_ON(type & ~IRQ_TYPE_SENSE_MASK))
789 type &= IRQ_TYPE_SENSE_MASK;
792 * If we've already configured this interrupt,
793 * don't do it again, or hell will break loose.
795 virq = irq_find_mapping(domain, hwirq);
798 * If the trigger type is not specified or matches the
799 * current trigger type then we are done so return the
802 if (type == IRQ_TYPE_NONE || type == irq_get_trigger_type(virq))
806 * If the trigger type has not been set yet, then set
807 * it now and return the interrupt number.
809 if (irq_get_trigger_type(virq) == IRQ_TYPE_NONE) {
810 irq_data = irq_get_irq_data(virq);
814 irqd_set_trigger_type(irq_data, type);
818 pr_warn("type mismatch, failed to map hwirq-%lu for %s!\n",
819 hwirq, of_node_full_name(to_of_node(fwspec->fwnode)));
823 if (irq_domain_is_hierarchy(domain)) {
824 virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, fwspec);
829 virq = irq_create_mapping(domain, hwirq);
834 irq_data = irq_get_irq_data(virq);
836 if (irq_domain_is_hierarchy(domain))
837 irq_domain_free_irqs(virq, 1);
839 irq_dispose_mapping(virq);
843 /* Store trigger type */
844 irqd_set_trigger_type(irq_data, type);
848 EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping);
850 unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data)
852 struct irq_fwspec fwspec;
854 of_phandle_args_to_fwspec(irq_data->np, irq_data->args,
855 irq_data->args_count, &fwspec);
857 return irq_create_fwspec_mapping(&fwspec);
859 EXPORT_SYMBOL_GPL(irq_create_of_mapping);
862 * irq_dispose_mapping() - Unmap an interrupt
863 * @virq: linux irq number of the interrupt to unmap
865 void irq_dispose_mapping(unsigned int virq)
867 struct irq_data *irq_data = irq_get_irq_data(virq);
868 struct irq_domain *domain;
870 if (!virq || !irq_data)
873 domain = irq_data->domain;
874 if (WARN_ON(domain == NULL))
877 if (irq_domain_is_hierarchy(domain)) {
878 irq_domain_free_irqs(virq, 1);
880 irq_domain_disassociate(domain, virq);
884 EXPORT_SYMBOL_GPL(irq_dispose_mapping);
887 * irq_find_mapping() - Find a linux irq from a hw irq number.
888 * @domain: domain owning this hardware interrupt
889 * @hwirq: hardware irq number in that domain space
891 unsigned int irq_find_mapping(struct irq_domain *domain,
892 irq_hw_number_t hwirq)
894 struct irq_data *data;
896 /* Look for default domain if nececssary */
898 domain = irq_default_domain;
902 if (hwirq < domain->revmap_direct_max_irq) {
903 data = irq_domain_get_irq_data(domain, hwirq);
904 if (data && data->hwirq == hwirq)
908 /* Check if the hwirq is in the linear revmap. */
909 if (hwirq < domain->revmap_size)
910 return domain->linear_revmap[hwirq];
913 data = radix_tree_lookup(&domain->revmap_tree, hwirq);
915 return data ? data->irq : 0;
917 EXPORT_SYMBOL_GPL(irq_find_mapping);
920 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
922 * Device Tree IRQ specifier translation function which works with one cell
923 * bindings where the cell value maps directly to the hwirq number.
925 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
926 const u32 *intspec, unsigned int intsize,
927 unsigned long *out_hwirq, unsigned int *out_type)
929 if (WARN_ON(intsize < 1))
931 *out_hwirq = intspec[0];
932 *out_type = IRQ_TYPE_NONE;
935 EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell);
938 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings
940 * Device Tree IRQ specifier translation function which works with two cell
941 * bindings where the cell values map directly to the hwirq number
942 * and linux irq flags.
944 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
945 const u32 *intspec, unsigned int intsize,
946 irq_hw_number_t *out_hwirq, unsigned int *out_type)
948 struct irq_fwspec fwspec;
950 of_phandle_args_to_fwspec(ctrlr, intspec, intsize, &fwspec);
951 return irq_domain_translate_twocell(d, &fwspec, out_hwirq, out_type);
953 EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell);
956 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings
958 * Device Tree IRQ specifier translation function which works with either one
959 * or two cell bindings where the cell values map directly to the hwirq number
960 * and linux irq flags.
962 * Note: don't use this function unless your interrupt controller explicitly
963 * supports both one and two cell bindings. For the majority of controllers
964 * the _onecell() or _twocell() variants above should be used.
966 int irq_domain_xlate_onetwocell(struct irq_domain *d,
967 struct device_node *ctrlr,
968 const u32 *intspec, unsigned int intsize,
969 unsigned long *out_hwirq, unsigned int *out_type)
971 if (WARN_ON(intsize < 1))
973 *out_hwirq = intspec[0];
975 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
977 *out_type = IRQ_TYPE_NONE;
980 EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell);
982 const struct irq_domain_ops irq_domain_simple_ops = {
983 .xlate = irq_domain_xlate_onetwocell,
985 EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
988 * irq_domain_translate_twocell() - Generic translate for direct two cell
991 * Device Tree IRQ specifier translation function which works with two cell
992 * bindings where the cell values map directly to the hwirq number
993 * and linux irq flags.
995 int irq_domain_translate_twocell(struct irq_domain *d,
996 struct irq_fwspec *fwspec,
997 unsigned long *out_hwirq,
998 unsigned int *out_type)
1000 if (WARN_ON(fwspec->param_count < 2))
1002 *out_hwirq = fwspec->param[0];
1003 *out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;
1006 EXPORT_SYMBOL_GPL(irq_domain_translate_twocell);
1008 int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq,
1009 int node, const struct irq_affinity_desc *affinity)
1014 virq = __irq_alloc_descs(virq, virq, cnt, node, THIS_MODULE,
1017 hint = hwirq % nr_irqs;
1020 virq = __irq_alloc_descs(-1, hint, cnt, node, THIS_MODULE,
1022 if (virq <= 0 && hint > 1) {
1023 virq = __irq_alloc_descs(-1, 1, cnt, node, THIS_MODULE,
1031 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1033 * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy
1034 * @parent: Parent irq domain to associate with the new domain
1035 * @flags: Irq domain flags associated to the domain
1036 * @size: Size of the domain. See below
1037 * @fwnode: Optional fwnode of the interrupt controller
1038 * @ops: Pointer to the interrupt domain callbacks
1039 * @host_data: Controller private data pointer
1041 * If @size is 0 a tree domain is created, otherwise a linear domain.
1043 * If successful the parent is associated to the new domain and the
1044 * domain flags are set.
1045 * Returns pointer to IRQ domain, or NULL on failure.
1047 struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
1050 struct fwnode_handle *fwnode,
1051 const struct irq_domain_ops *ops,
1054 struct irq_domain *domain;
1057 domain = irq_domain_create_linear(fwnode, size, ops, host_data);
1059 domain = irq_domain_create_tree(fwnode, ops, host_data);
1061 domain->parent = parent;
1062 domain->flags |= flags;
1067 EXPORT_SYMBOL_GPL(irq_domain_create_hierarchy);
1069 static void irq_domain_insert_irq(int virq)
1071 struct irq_data *data;
1073 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1074 struct irq_domain *domain = data->domain;
1077 irq_domain_set_mapping(domain, data->hwirq, data);
1079 /* If not already assigned, give the domain the chip's name */
1080 if (!domain->name && data->chip)
1081 domain->name = data->chip->name;
1084 irq_clear_status_flags(virq, IRQ_NOREQUEST);
1087 static void irq_domain_remove_irq(int virq)
1089 struct irq_data *data;
1091 irq_set_status_flags(virq, IRQ_NOREQUEST);
1092 irq_set_chip_and_handler(virq, NULL, NULL);
1093 synchronize_irq(virq);
1096 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1097 struct irq_domain *domain = data->domain;
1098 irq_hw_number_t hwirq = data->hwirq;
1101 irq_domain_clear_mapping(domain, hwirq);
1105 static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain,
1106 struct irq_data *child)
1108 struct irq_data *irq_data;
1110 irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL,
1111 irq_data_get_node(child));
1113 child->parent_data = irq_data;
1114 irq_data->irq = child->irq;
1115 irq_data->common = child->common;
1116 irq_data->domain = domain;
1122 static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs)
1124 struct irq_data *irq_data, *tmp;
1127 for (i = 0; i < nr_irqs; i++) {
1128 irq_data = irq_get_irq_data(virq + i);
1129 tmp = irq_data->parent_data;
1130 irq_data->parent_data = NULL;
1131 irq_data->domain = NULL;
1135 tmp = tmp->parent_data;
1141 static int irq_domain_alloc_irq_data(struct irq_domain *domain,
1142 unsigned int virq, unsigned int nr_irqs)
1144 struct irq_data *irq_data;
1145 struct irq_domain *parent;
1148 /* The outermost irq_data is embedded in struct irq_desc */
1149 for (i = 0; i < nr_irqs; i++) {
1150 irq_data = irq_get_irq_data(virq + i);
1151 irq_data->domain = domain;
1153 for (parent = domain->parent; parent; parent = parent->parent) {
1154 irq_data = irq_domain_insert_irq_data(parent, irq_data);
1156 irq_domain_free_irq_data(virq, i + 1);
1166 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1167 * @domain: domain to match
1168 * @virq: IRQ number to get irq_data
1170 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1173 struct irq_data *irq_data;
1175 for (irq_data = irq_get_irq_data(virq); irq_data;
1176 irq_data = irq_data->parent_data)
1177 if (irq_data->domain == domain)
1182 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1185 * irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain
1186 * @domain: Interrupt domain to match
1188 * @hwirq: The hwirq number
1189 * @chip: The associated interrupt chip
1190 * @chip_data: The associated chip data
1192 int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq,
1193 irq_hw_number_t hwirq, struct irq_chip *chip,
1196 struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq);
1201 irq_data->hwirq = hwirq;
1202 irq_data->chip = chip ? chip : &no_irq_chip;
1203 irq_data->chip_data = chip_data;
1207 EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip);
1210 * irq_domain_set_info - Set the complete data for a @virq in @domain
1211 * @domain: Interrupt domain to match
1213 * @hwirq: The hardware interrupt number
1214 * @chip: The associated interrupt chip
1215 * @chip_data: The associated interrupt chip data
1216 * @handler: The interrupt flow handler
1217 * @handler_data: The interrupt flow handler data
1218 * @handler_name: The interrupt handler name
1220 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1221 irq_hw_number_t hwirq, struct irq_chip *chip,
1222 void *chip_data, irq_flow_handler_t handler,
1223 void *handler_data, const char *handler_name)
1225 irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data);
1226 __irq_set_handler(virq, handler, 0, handler_name);
1227 irq_set_handler_data(virq, handler_data);
1229 EXPORT_SYMBOL(irq_domain_set_info);
1232 * irq_domain_reset_irq_data - Clear hwirq, chip and chip_data in @irq_data
1233 * @irq_data: The pointer to irq_data
1235 void irq_domain_reset_irq_data(struct irq_data *irq_data)
1237 irq_data->hwirq = 0;
1238 irq_data->chip = &no_irq_chip;
1239 irq_data->chip_data = NULL;
1241 EXPORT_SYMBOL_GPL(irq_domain_reset_irq_data);
1244 * irq_domain_free_irqs_common - Clear irq_data and free the parent
1245 * @domain: Interrupt domain to match
1246 * @virq: IRQ number to start with
1247 * @nr_irqs: The number of irqs to free
1249 void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq,
1250 unsigned int nr_irqs)
1252 struct irq_data *irq_data;
1255 for (i = 0; i < nr_irqs; i++) {
1256 irq_data = irq_domain_get_irq_data(domain, virq + i);
1258 irq_domain_reset_irq_data(irq_data);
1260 irq_domain_free_irqs_parent(domain, virq, nr_irqs);
1262 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_common);
1265 * irq_domain_free_irqs_top - Clear handler and handler data, clear irqdata and free parent
1266 * @domain: Interrupt domain to match
1267 * @virq: IRQ number to start with
1268 * @nr_irqs: The number of irqs to free
1270 void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq,
1271 unsigned int nr_irqs)
1275 for (i = 0; i < nr_irqs; i++) {
1276 irq_set_handler_data(virq + i, NULL);
1277 irq_set_handler(virq + i, NULL);
1279 irq_domain_free_irqs_common(domain, virq, nr_irqs);
1282 static void irq_domain_free_irqs_hierarchy(struct irq_domain *domain,
1283 unsigned int irq_base,
1284 unsigned int nr_irqs)
1286 if (domain->ops->free)
1287 domain->ops->free(domain, irq_base, nr_irqs);
1290 int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,
1291 unsigned int irq_base,
1292 unsigned int nr_irqs, void *arg)
1294 return domain->ops->alloc(domain, irq_base, nr_irqs, arg);
1298 * __irq_domain_alloc_irqs - Allocate IRQs from domain
1299 * @domain: domain to allocate from
1300 * @irq_base: allocate specified IRQ number if irq_base >= 0
1301 * @nr_irqs: number of IRQs to allocate
1302 * @node: NUMA node id for memory allocation
1303 * @arg: domain specific argument
1304 * @realloc: IRQ descriptors have already been allocated if true
1305 * @affinity: Optional irq affinity mask for multiqueue devices
1307 * Allocate IRQ numbers and initialized all data structures to support
1308 * hierarchy IRQ domains.
1309 * Parameter @realloc is mainly to support legacy IRQs.
1310 * Returns error code or allocated IRQ number
1312 * The whole process to setup an IRQ has been split into two steps.
1313 * The first step, __irq_domain_alloc_irqs(), is to allocate IRQ
1314 * descriptor and required hardware resources. The second step,
1315 * irq_domain_activate_irq(), is to program hardwares with preallocated
1316 * resources. In this way, it's easier to rollback when failing to
1317 * allocate resources.
1319 int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
1320 unsigned int nr_irqs, int node, void *arg,
1321 bool realloc, const struct irq_affinity_desc *affinity)
1325 if (domain == NULL) {
1326 domain = irq_default_domain;
1327 if (WARN(!domain, "domain is NULL; cannot allocate IRQ\n"))
1331 if (!domain->ops->alloc) {
1332 pr_debug("domain->ops->alloc() is NULL\n");
1336 if (realloc && irq_base >= 0) {
1339 virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node,
1342 pr_debug("cannot allocate IRQ(base %d, count %d)\n",
1348 if (irq_domain_alloc_irq_data(domain, virq, nr_irqs)) {
1349 pr_debug("cannot allocate memory for IRQ%d\n", virq);
1354 mutex_lock(&irq_domain_mutex);
1355 ret = irq_domain_alloc_irqs_hierarchy(domain, virq, nr_irqs, arg);
1357 mutex_unlock(&irq_domain_mutex);
1358 goto out_free_irq_data;
1360 for (i = 0; i < nr_irqs; i++)
1361 irq_domain_insert_irq(virq + i);
1362 mutex_unlock(&irq_domain_mutex);
1367 irq_domain_free_irq_data(virq, nr_irqs);
1369 irq_free_descs(virq, nr_irqs);
1373 /* The irq_data was moved, fix the revmap to refer to the new location */
1374 static void irq_domain_fix_revmap(struct irq_data *d)
1378 if (d->hwirq < d->domain->revmap_size)
1379 return; /* Not using radix tree. */
1381 /* Fix up the revmap. */
1382 mutex_lock(&d->domain->revmap_tree_mutex);
1383 slot = radix_tree_lookup_slot(&d->domain->revmap_tree, d->hwirq);
1385 radix_tree_replace_slot(&d->domain->revmap_tree, slot, d);
1386 mutex_unlock(&d->domain->revmap_tree_mutex);
1390 * irq_domain_push_irq() - Push a domain in to the top of a hierarchy.
1391 * @domain: Domain to push.
1392 * @virq: Irq to push the domain in to.
1393 * @arg: Passed to the irq_domain_ops alloc() function.
1395 * For an already existing irqdomain hierarchy, as might be obtained
1396 * via a call to pci_enable_msix(), add an additional domain to the
1397 * head of the processing chain. Must be called before request_irq()
1400 int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg)
1402 struct irq_data *child_irq_data;
1403 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1404 struct irq_desc *desc;
1408 * Check that no action has been set, which indicates the virq
1409 * is in a state where this function doesn't have to deal with
1410 * races between interrupt handling and maintaining the
1411 * hierarchy. This will catch gross misuse. Attempting to
1412 * make the check race free would require holding locks across
1413 * calls to struct irq_domain_ops->alloc(), which could lead
1414 * to deadlock, so we just do a simple check before starting.
1416 desc = irq_to_desc(virq);
1419 if (WARN_ON(desc->action))
1425 if (WARN_ON(!irq_domain_is_hierarchy(domain)))
1431 if (domain->parent != root_irq_data->domain)
1434 child_irq_data = kzalloc_node(sizeof(*child_irq_data), GFP_KERNEL,
1435 irq_data_get_node(root_irq_data));
1436 if (!child_irq_data)
1439 mutex_lock(&irq_domain_mutex);
1441 /* Copy the original irq_data. */
1442 *child_irq_data = *root_irq_data;
1445 * Overwrite the root_irq_data, which is embedded in struct
1446 * irq_desc, with values for this domain.
1448 root_irq_data->parent_data = child_irq_data;
1449 root_irq_data->domain = domain;
1450 root_irq_data->mask = 0;
1451 root_irq_data->hwirq = 0;
1452 root_irq_data->chip = NULL;
1453 root_irq_data->chip_data = NULL;
1455 /* May (probably does) set hwirq, chip, etc. */
1456 rv = irq_domain_alloc_irqs_hierarchy(domain, virq, 1, arg);
1458 /* Restore the original irq_data. */
1459 *root_irq_data = *child_irq_data;
1463 irq_domain_fix_revmap(child_irq_data);
1464 irq_domain_set_mapping(domain, root_irq_data->hwirq, root_irq_data);
1467 mutex_unlock(&irq_domain_mutex);
1471 EXPORT_SYMBOL_GPL(irq_domain_push_irq);
1474 * irq_domain_pop_irq() - Remove a domain from the top of a hierarchy.
1475 * @domain: Domain to remove.
1476 * @virq: Irq to remove the domain from.
1478 * Undo the effects of a call to irq_domain_push_irq(). Must be
1479 * called either before request_irq() or after free_irq().
1481 int irq_domain_pop_irq(struct irq_domain *domain, int virq)
1483 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1484 struct irq_data *child_irq_data;
1485 struct irq_data *tmp_irq_data;
1486 struct irq_desc *desc;
1489 * Check that no action is set, which indicates the virq is in
1490 * a state where this function doesn't have to deal with races
1491 * between interrupt handling and maintaining the hierarchy.
1492 * This will catch gross misuse. Attempting to make the check
1493 * race free would require holding locks across calls to
1494 * struct irq_domain_ops->free(), which could lead to
1495 * deadlock, so we just do a simple check before starting.
1497 desc = irq_to_desc(virq);
1500 if (WARN_ON(desc->action))
1509 tmp_irq_data = irq_domain_get_irq_data(domain, virq);
1511 /* We can only "pop" if this domain is at the top of the list */
1512 if (WARN_ON(root_irq_data != tmp_irq_data))
1515 if (WARN_ON(root_irq_data->domain != domain))
1518 child_irq_data = root_irq_data->parent_data;
1519 if (WARN_ON(!child_irq_data))
1522 mutex_lock(&irq_domain_mutex);
1524 root_irq_data->parent_data = NULL;
1526 irq_domain_clear_mapping(domain, root_irq_data->hwirq);
1527 irq_domain_free_irqs_hierarchy(domain, virq, 1);
1529 /* Restore the original irq_data. */
1530 *root_irq_data = *child_irq_data;
1532 irq_domain_fix_revmap(root_irq_data);
1534 mutex_unlock(&irq_domain_mutex);
1536 kfree(child_irq_data);
1540 EXPORT_SYMBOL_GPL(irq_domain_pop_irq);
1543 * irq_domain_free_irqs - Free IRQ number and associated data structures
1544 * @virq: base IRQ number
1545 * @nr_irqs: number of IRQs to free
1547 void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs)
1549 struct irq_data *data = irq_get_irq_data(virq);
1552 if (WARN(!data || !data->domain || !data->domain->ops->free,
1553 "NULL pointer, cannot free irq\n"))
1556 mutex_lock(&irq_domain_mutex);
1557 for (i = 0; i < nr_irqs; i++)
1558 irq_domain_remove_irq(virq + i);
1559 irq_domain_free_irqs_hierarchy(data->domain, virq, nr_irqs);
1560 mutex_unlock(&irq_domain_mutex);
1562 irq_domain_free_irq_data(virq, nr_irqs);
1563 irq_free_descs(virq, nr_irqs);
1567 * irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain
1568 * @irq_base: Base IRQ number
1569 * @nr_irqs: Number of IRQs to allocate
1570 * @arg: Allocation data (arch/domain specific)
1572 * Check whether the domain has been setup recursive. If not allocate
1573 * through the parent domain.
1575 int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
1576 unsigned int irq_base, unsigned int nr_irqs,
1579 if (!domain->parent)
1582 return irq_domain_alloc_irqs_hierarchy(domain->parent, irq_base,
1585 EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent);
1588 * irq_domain_free_irqs_parent - Free interrupts from parent domain
1589 * @irq_base: Base IRQ number
1590 * @nr_irqs: Number of IRQs to free
1592 * Check whether the domain has been setup recursive. If not free
1593 * through the parent domain.
1595 void irq_domain_free_irqs_parent(struct irq_domain *domain,
1596 unsigned int irq_base, unsigned int nr_irqs)
1598 if (!domain->parent)
1601 irq_domain_free_irqs_hierarchy(domain->parent, irq_base, nr_irqs);
1603 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent);
1605 static void __irq_domain_deactivate_irq(struct irq_data *irq_data)
1607 if (irq_data && irq_data->domain) {
1608 struct irq_domain *domain = irq_data->domain;
1610 if (domain->ops->deactivate)
1611 domain->ops->deactivate(domain, irq_data);
1612 if (irq_data->parent_data)
1613 __irq_domain_deactivate_irq(irq_data->parent_data);
1617 static int __irq_domain_activate_irq(struct irq_data *irqd, bool reserve)
1621 if (irqd && irqd->domain) {
1622 struct irq_domain *domain = irqd->domain;
1624 if (irqd->parent_data)
1625 ret = __irq_domain_activate_irq(irqd->parent_data,
1627 if (!ret && domain->ops->activate) {
1628 ret = domain->ops->activate(domain, irqd, reserve);
1629 /* Rollback in case of error */
1630 if (ret && irqd->parent_data)
1631 __irq_domain_deactivate_irq(irqd->parent_data);
1638 * irq_domain_activate_irq - Call domain_ops->activate recursively to activate
1640 * @irq_data: Outermost irq_data associated with interrupt
1641 * @reserve: If set only reserve an interrupt vector instead of assigning one
1643 * This is the second step to call domain_ops->activate to program interrupt
1644 * controllers, so the interrupt could actually get delivered.
1646 int irq_domain_activate_irq(struct irq_data *irq_data, bool reserve)
1650 if (!irqd_is_activated(irq_data))
1651 ret = __irq_domain_activate_irq(irq_data, reserve);
1653 irqd_set_activated(irq_data);
1658 * irq_domain_deactivate_irq - Call domain_ops->deactivate recursively to
1659 * deactivate interrupt
1660 * @irq_data: outermost irq_data associated with interrupt
1662 * It calls domain_ops->deactivate to program interrupt controllers to disable
1663 * interrupt delivery.
1665 void irq_domain_deactivate_irq(struct irq_data *irq_data)
1667 if (irqd_is_activated(irq_data)) {
1668 __irq_domain_deactivate_irq(irq_data);
1669 irqd_clr_activated(irq_data);
1673 static void irq_domain_check_hierarchy(struct irq_domain *domain)
1675 /* Hierarchy irq_domains must implement callback alloc() */
1676 if (domain->ops->alloc)
1677 domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY;
1681 * irq_domain_hierarchical_is_msi_remap - Check if the domain or any
1682 * parent has MSI remapping support
1683 * @domain: domain pointer
1685 bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain)
1687 for (; domain; domain = domain->parent) {
1688 if (irq_domain_is_msi_remap(domain))
1693 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1695 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1696 * @domain: domain to match
1697 * @virq: IRQ number to get irq_data
1699 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1702 struct irq_data *irq_data = irq_get_irq_data(virq);
1704 return (irq_data && irq_data->domain == domain) ? irq_data : NULL;
1706 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1709 * irq_domain_set_info - Set the complete data for a @virq in @domain
1710 * @domain: Interrupt domain to match
1712 * @hwirq: The hardware interrupt number
1713 * @chip: The associated interrupt chip
1714 * @chip_data: The associated interrupt chip data
1715 * @handler: The interrupt flow handler
1716 * @handler_data: The interrupt flow handler data
1717 * @handler_name: The interrupt handler name
1719 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1720 irq_hw_number_t hwirq, struct irq_chip *chip,
1721 void *chip_data, irq_flow_handler_t handler,
1722 void *handler_data, const char *handler_name)
1724 irq_set_chip_and_handler_name(virq, chip, handler, handler_name);
1725 irq_set_chip_data(virq, chip_data);
1726 irq_set_handler_data(virq, handler_data);
1729 static void irq_domain_check_hierarchy(struct irq_domain *domain)
1732 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1734 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
1735 static struct dentry *domain_dir;
1738 irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind)
1740 seq_printf(m, "%*sname: %s\n", ind, "", d->name);
1741 seq_printf(m, "%*ssize: %u\n", ind + 1, "",
1742 d->revmap_size + d->revmap_direct_max_irq);
1743 seq_printf(m, "%*smapped: %u\n", ind + 1, "", d->mapcount);
1744 seq_printf(m, "%*sflags: 0x%08x\n", ind +1 , "", d->flags);
1745 if (d->ops && d->ops->debug_show)
1746 d->ops->debug_show(m, d, NULL, ind + 1);
1747 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1750 seq_printf(m, "%*sparent: %s\n", ind + 1, "", d->parent->name);
1751 irq_domain_debug_show_one(m, d->parent, ind + 4);
1755 static int irq_domain_debug_show(struct seq_file *m, void *p)
1757 struct irq_domain *d = m->private;
1759 /* Default domain? Might be NULL */
1761 if (!irq_default_domain)
1763 d = irq_default_domain;
1765 irq_domain_debug_show_one(m, d, 0);
1768 DEFINE_SHOW_ATTRIBUTE(irq_domain_debug);
1770 static void debugfs_add_domain_dir(struct irq_domain *d)
1772 if (!d->name || !domain_dir || d->debugfs_file)
1774 d->debugfs_file = debugfs_create_file(d->name, 0444, domain_dir, d,
1775 &irq_domain_debug_fops);
1778 static void debugfs_remove_domain_dir(struct irq_domain *d)
1780 debugfs_remove(d->debugfs_file);
1781 d->debugfs_file = NULL;
1784 void __init irq_domain_debugfs_init(struct dentry *root)
1786 struct irq_domain *d;
1788 domain_dir = debugfs_create_dir("domains", root);
1790 debugfs_create_file("default", 0444, domain_dir, NULL,
1791 &irq_domain_debug_fops);
1792 mutex_lock(&irq_domain_mutex);
1793 list_for_each_entry(d, &irq_domain_list, link)
1794 debugfs_add_domain_dir(d);
1795 mutex_unlock(&irq_domain_mutex);