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 static const char *irqchip_fwnode_get_name(const struct fwnode_handle *fwnode)
47 struct irqchip_fwid *fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
52 const struct fwnode_operations irqchip_fwnode_ops = {
53 .get_name = irqchip_fwnode_get_name,
55 EXPORT_SYMBOL_GPL(irqchip_fwnode_ops);
58 * __irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for
59 * identifying an irq domain
60 * @type: Type of irqchip_fwnode. See linux/irqdomain.h
61 * @id: Optional user provided id if name != NULL
62 * @name: Optional user provided domain name
63 * @pa: Optional user-provided physical address
65 * Allocate a struct irqchip_fwid, and return a pointer to the embedded
66 * fwnode_handle (or NULL on failure).
68 * Note: The types IRQCHIP_FWNODE_NAMED and IRQCHIP_FWNODE_NAMED_ID are
69 * solely to transport name information to irqdomain creation code. The
70 * node is not stored. For other types the pointer is kept in the irq
73 struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
77 struct irqchip_fwid *fwid;
80 fwid = kzalloc(sizeof(*fwid), GFP_KERNEL);
83 case IRQCHIP_FWNODE_NAMED:
84 n = kasprintf(GFP_KERNEL, "%s", name);
86 case IRQCHIP_FWNODE_NAMED_ID:
87 n = kasprintf(GFP_KERNEL, "%s-%d", name, id);
90 n = kasprintf(GFP_KERNEL, "irqchip@%pa", pa);
103 fwnode_init(&fwid->fwnode, &irqchip_fwnode_ops);
104 return &fwid->fwnode;
106 EXPORT_SYMBOL_GPL(__irq_domain_alloc_fwnode);
109 * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle
111 * Free a fwnode_handle allocated with irq_domain_alloc_fwnode.
113 void irq_domain_free_fwnode(struct fwnode_handle *fwnode)
115 struct irqchip_fwid *fwid;
117 if (WARN_ON(!is_fwnode_irqchip(fwnode)))
120 fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
124 EXPORT_SYMBOL_GPL(irq_domain_free_fwnode);
127 * __irq_domain_add() - Allocate a new irq_domain data structure
128 * @fwnode: firmware node for the interrupt controller
129 * @size: Size of linear map; 0 for radix mapping only
130 * @hwirq_max: Maximum number of interrupts supported by controller
131 * @direct_max: Maximum value of direct maps; Use ~0 for no limit; 0 for no
133 * @ops: domain callbacks
134 * @host_data: Controller private data pointer
136 * Allocates and initializes an irq_domain structure.
137 * Returns pointer to IRQ domain, or NULL on failure.
139 struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
140 irq_hw_number_t hwirq_max, int direct_max,
141 const struct irq_domain_ops *ops,
144 struct irqchip_fwid *fwid;
145 struct irq_domain *domain;
147 static atomic_t unknown_domains;
149 if (WARN_ON((size && direct_max) ||
150 (!IS_ENABLED(CONFIG_IRQ_DOMAIN_NOMAP) && direct_max)))
153 domain = kzalloc_node(struct_size(domain, revmap, size),
154 GFP_KERNEL, of_node_to_nid(to_of_node(fwnode)));
158 if (is_fwnode_irqchip(fwnode)) {
159 fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
161 switch (fwid->type) {
162 case IRQCHIP_FWNODE_NAMED:
163 case IRQCHIP_FWNODE_NAMED_ID:
164 domain->fwnode = fwnode;
165 domain->name = kstrdup(fwid->name, GFP_KERNEL);
170 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
173 domain->fwnode = fwnode;
174 domain->name = fwid->name;
177 } else if (is_of_node(fwnode) || is_acpi_device_node(fwnode) ||
178 is_software_node(fwnode)) {
182 * fwnode 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, "%pfw", fwnode);
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 fwnode_handle_get(fwnode);
212 fwnode_dev_initialized(fwnode, true);
215 INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
216 mutex_init(&domain->revmap_mutex);
218 domain->host_data = host_data;
219 domain->hwirq_max = hwirq_max;
223 domain->flags |= IRQ_DOMAIN_FLAG_NO_MAP;
226 domain->revmap_size = size;
228 irq_domain_check_hierarchy(domain);
230 mutex_lock(&irq_domain_mutex);
231 debugfs_add_domain_dir(domain);
232 list_add(&domain->link, &irq_domain_list);
233 mutex_unlock(&irq_domain_mutex);
235 pr_debug("Added domain %s\n", domain->name);
238 EXPORT_SYMBOL_GPL(__irq_domain_add);
241 * irq_domain_remove() - Remove an irq domain.
242 * @domain: domain to remove
244 * This routine is used to remove an irq domain. The caller must ensure
245 * that all mappings within the domain have been disposed of prior to
246 * use, depending on the revmap type.
248 void irq_domain_remove(struct irq_domain *domain)
250 mutex_lock(&irq_domain_mutex);
251 debugfs_remove_domain_dir(domain);
253 WARN_ON(!radix_tree_empty(&domain->revmap_tree));
255 list_del(&domain->link);
258 * If the going away domain is the default one, reset it.
260 if (unlikely(irq_default_domain == domain))
261 irq_set_default_host(NULL);
263 mutex_unlock(&irq_domain_mutex);
265 pr_debug("Removed domain %s\n", domain->name);
267 fwnode_dev_initialized(domain->fwnode, false);
268 fwnode_handle_put(domain->fwnode);
269 if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
273 EXPORT_SYMBOL_GPL(irq_domain_remove);
275 void irq_domain_update_bus_token(struct irq_domain *domain,
276 enum irq_domain_bus_token bus_token)
280 if (domain->bus_token == bus_token)
283 mutex_lock(&irq_domain_mutex);
285 domain->bus_token = bus_token;
287 name = kasprintf(GFP_KERNEL, "%s-%d", domain->name, bus_token);
289 mutex_unlock(&irq_domain_mutex);
293 debugfs_remove_domain_dir(domain);
295 if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
298 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
301 debugfs_add_domain_dir(domain);
303 mutex_unlock(&irq_domain_mutex);
305 EXPORT_SYMBOL_GPL(irq_domain_update_bus_token);
308 * irq_domain_create_simple() - Register an irq_domain and optionally map a range of irqs
309 * @fwnode: firmware node for the interrupt controller
310 * @size: total number of irqs in mapping
311 * @first_irq: first number of irq block assigned to the domain,
312 * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then
313 * pre-map all of the irqs in the domain to virqs starting at first_irq.
314 * @ops: domain callbacks
315 * @host_data: Controller private data pointer
317 * Allocates an irq_domain, and optionally if first_irq is positive then also
318 * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq.
320 * This is intended to implement the expected behaviour for most
321 * interrupt controllers. If device tree is used, then first_irq will be 0 and
322 * irqs get mapped dynamically on the fly. However, if the controller requires
323 * static virq assignments (non-DT boot) then it will set that up correctly.
325 struct irq_domain *irq_domain_create_simple(struct fwnode_handle *fwnode,
327 unsigned int first_irq,
328 const struct irq_domain_ops *ops,
331 struct irq_domain *domain;
333 domain = __irq_domain_add(fwnode, size, size, 0, ops, host_data);
338 if (IS_ENABLED(CONFIG_SPARSE_IRQ)) {
339 /* attempt to allocated irq_descs */
340 int rc = irq_alloc_descs(first_irq, first_irq, size,
341 of_node_to_nid(to_of_node(fwnode)));
343 pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
346 irq_domain_associate_many(domain, first_irq, 0, size);
351 EXPORT_SYMBOL_GPL(irq_domain_create_simple);
354 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain.
355 * @of_node: pointer to interrupt controller's device tree node.
356 * @size: total number of irqs in legacy mapping
357 * @first_irq: first number of irq block assigned to the domain
358 * @first_hwirq: first hwirq number to use for the translation. Should normally
359 * be '0', but a positive integer can be used if the effective
360 * hwirqs numbering does not begin at zero.
361 * @ops: map/unmap domain callbacks
362 * @host_data: Controller private data pointer
364 * Note: the map() callback will be called before this function returns
365 * for all legacy interrupts except 0 (which is always the invalid irq for
366 * a legacy controller).
368 struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
370 unsigned int first_irq,
371 irq_hw_number_t first_hwirq,
372 const struct irq_domain_ops *ops,
375 return irq_domain_create_legacy(of_node_to_fwnode(of_node), size,
376 first_irq, first_hwirq, ops, host_data);
378 EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
380 struct irq_domain *irq_domain_create_legacy(struct fwnode_handle *fwnode,
382 unsigned int first_irq,
383 irq_hw_number_t first_hwirq,
384 const struct irq_domain_ops *ops,
387 struct irq_domain *domain;
389 domain = __irq_domain_add(fwnode, first_hwirq + size, first_hwirq + size, 0, ops, host_data);
391 irq_domain_associate_many(domain, first_irq, first_hwirq, size);
395 EXPORT_SYMBOL_GPL(irq_domain_create_legacy);
398 * irq_find_matching_fwspec() - Locates a domain for a given fwspec
399 * @fwspec: FW specifier for an interrupt
400 * @bus_token: domain-specific data
402 struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
403 enum irq_domain_bus_token bus_token)
405 struct irq_domain *h, *found = NULL;
406 struct fwnode_handle *fwnode = fwspec->fwnode;
409 /* We might want to match the legacy controller last since
410 * it might potentially be set to match all interrupts in
411 * the absence of a device node. This isn't a problem so far
414 * bus_token == DOMAIN_BUS_ANY matches any domain, any other
415 * values must generate an exact match for the domain to be
418 mutex_lock(&irq_domain_mutex);
419 list_for_each_entry(h, &irq_domain_list, link) {
420 if (h->ops->select && fwspec->param_count)
421 rc = h->ops->select(h, fwspec, bus_token);
422 else if (h->ops->match)
423 rc = h->ops->match(h, to_of_node(fwnode), bus_token);
425 rc = ((fwnode != NULL) && (h->fwnode == fwnode) &&
426 ((bus_token == DOMAIN_BUS_ANY) ||
427 (h->bus_token == bus_token)));
434 mutex_unlock(&irq_domain_mutex);
437 EXPORT_SYMBOL_GPL(irq_find_matching_fwspec);
440 * irq_domain_check_msi_remap - Check whether all MSI irq domains implement
443 * Return: false if any MSI irq domain does not support IRQ remapping,
444 * true otherwise (including if there is no MSI irq domain)
446 bool irq_domain_check_msi_remap(void)
448 struct irq_domain *h;
451 mutex_lock(&irq_domain_mutex);
452 list_for_each_entry(h, &irq_domain_list, link) {
453 if (irq_domain_is_msi(h) &&
454 !irq_domain_hierarchical_is_msi_remap(h)) {
459 mutex_unlock(&irq_domain_mutex);
462 EXPORT_SYMBOL_GPL(irq_domain_check_msi_remap);
465 * irq_set_default_host() - Set a "default" irq domain
466 * @domain: default domain pointer
468 * For convenience, it's possible to set a "default" domain that will be used
469 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
470 * platforms that want to manipulate a few hard coded interrupt numbers that
471 * aren't properly represented in the device-tree.
473 void irq_set_default_host(struct irq_domain *domain)
475 pr_debug("Default domain set to @0x%p\n", domain);
477 irq_default_domain = domain;
479 EXPORT_SYMBOL_GPL(irq_set_default_host);
482 * irq_get_default_host() - Retrieve the "default" irq domain
484 * Returns: the default domain, if any.
486 * Modern code should never use this. This should only be used on
487 * systems that cannot implement a firmware->fwnode mapping (which
488 * both DT and ACPI provide).
490 struct irq_domain *irq_get_default_host(void)
492 return irq_default_domain;
495 static bool irq_domain_is_nomap(struct irq_domain *domain)
497 return IS_ENABLED(CONFIG_IRQ_DOMAIN_NOMAP) &&
498 (domain->flags & IRQ_DOMAIN_FLAG_NO_MAP);
501 static void irq_domain_clear_mapping(struct irq_domain *domain,
502 irq_hw_number_t hwirq)
504 if (irq_domain_is_nomap(domain))
507 mutex_lock(&domain->revmap_mutex);
508 if (hwirq < domain->revmap_size)
509 rcu_assign_pointer(domain->revmap[hwirq], NULL);
511 radix_tree_delete(&domain->revmap_tree, hwirq);
512 mutex_unlock(&domain->revmap_mutex);
515 static void irq_domain_set_mapping(struct irq_domain *domain,
516 irq_hw_number_t hwirq,
517 struct irq_data *irq_data)
519 if (irq_domain_is_nomap(domain))
522 mutex_lock(&domain->revmap_mutex);
523 if (hwirq < domain->revmap_size)
524 rcu_assign_pointer(domain->revmap[hwirq], irq_data);
526 radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
527 mutex_unlock(&domain->revmap_mutex);
530 static void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
532 struct irq_data *irq_data = irq_get_irq_data(irq);
533 irq_hw_number_t hwirq;
535 if (WARN(!irq_data || irq_data->domain != domain,
536 "virq%i doesn't exist; cannot disassociate\n", irq))
539 hwirq = irq_data->hwirq;
540 irq_set_status_flags(irq, IRQ_NOREQUEST);
542 /* remove chip and handler */
543 irq_set_chip_and_handler(irq, NULL, NULL);
545 /* Make sure it's completed */
546 synchronize_irq(irq);
548 /* Tell the PIC about it */
549 if (domain->ops->unmap)
550 domain->ops->unmap(domain, irq);
553 irq_data->domain = NULL;
557 /* Clear reverse map for this hwirq */
558 irq_domain_clear_mapping(domain, hwirq);
561 int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
562 irq_hw_number_t hwirq)
564 struct irq_data *irq_data = irq_get_irq_data(virq);
567 if (WARN(hwirq >= domain->hwirq_max,
568 "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name))
570 if (WARN(!irq_data, "error: virq%i is not allocated", virq))
572 if (WARN(irq_data->domain, "error: virq%i is already associated", virq))
575 mutex_lock(&irq_domain_mutex);
576 irq_data->hwirq = hwirq;
577 irq_data->domain = domain;
578 if (domain->ops->map) {
579 ret = domain->ops->map(domain, virq, hwirq);
582 * If map() returns -EPERM, this interrupt is protected
583 * by the firmware or some other service and shall not
584 * be mapped. Don't bother telling the user about it.
587 pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n",
588 domain->name, hwirq, virq, ret);
590 irq_data->domain = NULL;
592 mutex_unlock(&irq_domain_mutex);
596 /* If not already assigned, give the domain the chip's name */
597 if (!domain->name && irq_data->chip)
598 domain->name = irq_data->chip->name;
602 irq_domain_set_mapping(domain, hwirq, irq_data);
603 mutex_unlock(&irq_domain_mutex);
605 irq_clear_status_flags(virq, IRQ_NOREQUEST);
609 EXPORT_SYMBOL_GPL(irq_domain_associate);
611 void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
612 irq_hw_number_t hwirq_base, int count)
614 struct device_node *of_node;
617 of_node = irq_domain_get_of_node(domain);
618 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
619 of_node_full_name(of_node), irq_base, (int)hwirq_base, count);
621 for (i = 0; i < count; i++) {
622 irq_domain_associate(domain, irq_base + i, hwirq_base + i);
625 EXPORT_SYMBOL_GPL(irq_domain_associate_many);
627 #ifdef CONFIG_IRQ_DOMAIN_NOMAP
629 * irq_create_direct_mapping() - Allocate an irq for direct mapping
630 * @domain: domain to allocate the irq for or NULL for default domain
632 * This routine is used for irq controllers which can choose the hardware
633 * interrupt numbers they generate. In such a case it's simplest to use
634 * the linux irq as the hardware interrupt number. It still uses the linear
635 * or radix tree to store the mapping, but the irq controller can optimize
636 * the revmap path by using the hwirq directly.
638 unsigned int irq_create_direct_mapping(struct irq_domain *domain)
640 struct device_node *of_node;
644 domain = irq_default_domain;
646 of_node = irq_domain_get_of_node(domain);
647 virq = irq_alloc_desc_from(1, of_node_to_nid(of_node));
649 pr_debug("create_direct virq allocation failed\n");
652 if (virq >= domain->revmap_size) {
653 pr_err("ERROR: no free irqs available below %i maximum\n",
654 domain->revmap_size);
658 pr_debug("create_direct obtained virq %d\n", virq);
660 if (irq_domain_associate(domain, virq, virq)) {
667 EXPORT_SYMBOL_GPL(irq_create_direct_mapping);
671 * irq_create_mapping_affinity() - Map a hardware interrupt into linux irq space
672 * @domain: domain owning this hardware interrupt or NULL for default domain
673 * @hwirq: hardware irq number in that domain space
674 * @affinity: irq affinity
676 * Only one mapping per hardware interrupt is permitted. Returns a linux
678 * If the sense/trigger is to be specified, set_irq_type() should be called
679 * on the number returned from that call.
681 unsigned int irq_create_mapping_affinity(struct irq_domain *domain,
682 irq_hw_number_t hwirq,
683 const struct irq_affinity_desc *affinity)
685 struct device_node *of_node;
688 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
690 /* Look for default domain if necessary */
692 domain = irq_default_domain;
693 if (domain == NULL) {
694 WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq);
697 pr_debug("-> using domain @%p\n", domain);
699 of_node = irq_domain_get_of_node(domain);
701 /* Check if mapping already exists */
702 virq = irq_find_mapping(domain, hwirq);
704 pr_debug("-> existing mapping on virq %d\n", virq);
708 /* Allocate a virtual interrupt number */
709 virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node),
712 pr_debug("-> virq allocation failed\n");
716 if (irq_domain_associate(domain, virq, hwirq)) {
721 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
722 hwirq, of_node_full_name(of_node), virq);
726 EXPORT_SYMBOL_GPL(irq_create_mapping_affinity);
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 = of_node_to_fwnode(np);
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_resolve_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
890 * @irq: optional pointer to return the Linux irq if required
892 * Returns the interrupt descriptor.
894 struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain,
895 irq_hw_number_t hwirq,
898 struct irq_desc *desc = NULL;
899 struct irq_data *data;
901 /* Look for default domain if necessary */
903 domain = irq_default_domain;
907 if (irq_domain_is_nomap(domain)) {
908 if (hwirq < domain->revmap_size) {
909 data = irq_domain_get_irq_data(domain, hwirq);
910 if (data && data->hwirq == hwirq)
911 desc = irq_data_to_desc(data);
918 /* Check if the hwirq is in the linear revmap. */
919 if (hwirq < domain->revmap_size)
920 data = rcu_dereference(domain->revmap[hwirq]);
922 data = radix_tree_lookup(&domain->revmap_tree, hwirq);
925 desc = irq_data_to_desc(data);
933 EXPORT_SYMBOL_GPL(__irq_resolve_mapping);
936 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
938 * Device Tree IRQ specifier translation function which works with one cell
939 * bindings where the cell value maps directly to the hwirq number.
941 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
942 const u32 *intspec, unsigned int intsize,
943 unsigned long *out_hwirq, unsigned int *out_type)
945 if (WARN_ON(intsize < 1))
947 *out_hwirq = intspec[0];
948 *out_type = IRQ_TYPE_NONE;
951 EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell);
954 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings
956 * Device Tree IRQ specifier translation function which works with two cell
957 * bindings where the cell values map directly to the hwirq number
958 * and linux irq flags.
960 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
961 const u32 *intspec, unsigned int intsize,
962 irq_hw_number_t *out_hwirq, unsigned int *out_type)
964 struct irq_fwspec fwspec;
966 of_phandle_args_to_fwspec(ctrlr, intspec, intsize, &fwspec);
967 return irq_domain_translate_twocell(d, &fwspec, out_hwirq, out_type);
969 EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell);
972 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings
974 * Device Tree IRQ specifier translation function which works with either one
975 * or two cell bindings where the cell values map directly to the hwirq number
976 * and linux irq flags.
978 * Note: don't use this function unless your interrupt controller explicitly
979 * supports both one and two cell bindings. For the majority of controllers
980 * the _onecell() or _twocell() variants above should be used.
982 int irq_domain_xlate_onetwocell(struct irq_domain *d,
983 struct device_node *ctrlr,
984 const u32 *intspec, unsigned int intsize,
985 unsigned long *out_hwirq, unsigned int *out_type)
987 if (WARN_ON(intsize < 1))
989 *out_hwirq = intspec[0];
991 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
993 *out_type = IRQ_TYPE_NONE;
996 EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell);
998 const struct irq_domain_ops irq_domain_simple_ops = {
999 .xlate = irq_domain_xlate_onetwocell,
1001 EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
1004 * irq_domain_translate_onecell() - Generic translate for direct one cell
1007 int irq_domain_translate_onecell(struct irq_domain *d,
1008 struct irq_fwspec *fwspec,
1009 unsigned long *out_hwirq,
1010 unsigned int *out_type)
1012 if (WARN_ON(fwspec->param_count < 1))
1014 *out_hwirq = fwspec->param[0];
1015 *out_type = IRQ_TYPE_NONE;
1018 EXPORT_SYMBOL_GPL(irq_domain_translate_onecell);
1021 * irq_domain_translate_twocell() - Generic translate for direct two cell
1024 * Device Tree IRQ specifier translation function which works with two cell
1025 * bindings where the cell values map directly to the hwirq number
1026 * and linux irq flags.
1028 int irq_domain_translate_twocell(struct irq_domain *d,
1029 struct irq_fwspec *fwspec,
1030 unsigned long *out_hwirq,
1031 unsigned int *out_type)
1033 if (WARN_ON(fwspec->param_count < 2))
1035 *out_hwirq = fwspec->param[0];
1036 *out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;
1039 EXPORT_SYMBOL_GPL(irq_domain_translate_twocell);
1041 int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq,
1042 int node, const struct irq_affinity_desc *affinity)
1047 virq = __irq_alloc_descs(virq, virq, cnt, node, THIS_MODULE,
1050 hint = hwirq % nr_irqs;
1053 virq = __irq_alloc_descs(-1, hint, cnt, node, THIS_MODULE,
1055 if (virq <= 0 && hint > 1) {
1056 virq = __irq_alloc_descs(-1, 1, cnt, node, THIS_MODULE,
1065 * irq_domain_reset_irq_data - Clear hwirq, chip and chip_data in @irq_data
1066 * @irq_data: The pointer to irq_data
1068 void irq_domain_reset_irq_data(struct irq_data *irq_data)
1070 irq_data->hwirq = 0;
1071 irq_data->chip = &no_irq_chip;
1072 irq_data->chip_data = NULL;
1074 EXPORT_SYMBOL_GPL(irq_domain_reset_irq_data);
1076 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1078 * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy
1079 * @parent: Parent irq domain to associate with the new domain
1080 * @flags: Irq domain flags associated to the domain
1081 * @size: Size of the domain. See below
1082 * @fwnode: Optional fwnode of the interrupt controller
1083 * @ops: Pointer to the interrupt domain callbacks
1084 * @host_data: Controller private data pointer
1086 * If @size is 0 a tree domain is created, otherwise a linear domain.
1088 * If successful the parent is associated to the new domain and the
1089 * domain flags are set.
1090 * Returns pointer to IRQ domain, or NULL on failure.
1092 struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
1095 struct fwnode_handle *fwnode,
1096 const struct irq_domain_ops *ops,
1099 struct irq_domain *domain;
1102 domain = irq_domain_create_linear(fwnode, size, ops, host_data);
1104 domain = irq_domain_create_tree(fwnode, ops, host_data);
1106 domain->parent = parent;
1107 domain->flags |= flags;
1112 EXPORT_SYMBOL_GPL(irq_domain_create_hierarchy);
1114 static void irq_domain_insert_irq(int virq)
1116 struct irq_data *data;
1118 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1119 struct irq_domain *domain = data->domain;
1122 irq_domain_set_mapping(domain, data->hwirq, data);
1124 /* If not already assigned, give the domain the chip's name */
1125 if (!domain->name && data->chip)
1126 domain->name = data->chip->name;
1129 irq_clear_status_flags(virq, IRQ_NOREQUEST);
1132 static void irq_domain_remove_irq(int virq)
1134 struct irq_data *data;
1136 irq_set_status_flags(virq, IRQ_NOREQUEST);
1137 irq_set_chip_and_handler(virq, NULL, NULL);
1138 synchronize_irq(virq);
1141 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1142 struct irq_domain *domain = data->domain;
1143 irq_hw_number_t hwirq = data->hwirq;
1146 irq_domain_clear_mapping(domain, hwirq);
1150 static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain,
1151 struct irq_data *child)
1153 struct irq_data *irq_data;
1155 irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL,
1156 irq_data_get_node(child));
1158 child->parent_data = irq_data;
1159 irq_data->irq = child->irq;
1160 irq_data->common = child->common;
1161 irq_data->domain = domain;
1167 static void __irq_domain_free_hierarchy(struct irq_data *irq_data)
1169 struct irq_data *tmp;
1173 irq_data = irq_data->parent_data;
1178 static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs)
1180 struct irq_data *irq_data, *tmp;
1183 for (i = 0; i < nr_irqs; i++) {
1184 irq_data = irq_get_irq_data(virq + i);
1185 tmp = irq_data->parent_data;
1186 irq_data->parent_data = NULL;
1187 irq_data->domain = NULL;
1189 __irq_domain_free_hierarchy(tmp);
1194 * irq_domain_disconnect_hierarchy - Mark the first unused level of a hierarchy
1195 * @domain: IRQ domain from which the hierarchy is to be disconnected
1196 * @virq: IRQ number where the hierarchy is to be trimmed
1198 * Marks the @virq level belonging to @domain as disconnected.
1199 * Returns -EINVAL if @virq doesn't have a valid irq_data pointing
1202 * Its only use is to be able to trim levels of hierarchy that do not
1203 * have any real meaning for this interrupt, and that the driver marks
1204 * as such from its .alloc() callback.
1206 int irq_domain_disconnect_hierarchy(struct irq_domain *domain,
1209 struct irq_data *irqd;
1211 irqd = irq_domain_get_irq_data(domain, virq);
1215 irqd->chip = ERR_PTR(-ENOTCONN);
1218 EXPORT_SYMBOL_GPL(irq_domain_disconnect_hierarchy);
1220 static int irq_domain_trim_hierarchy(unsigned int virq)
1222 struct irq_data *tail, *irqd, *irq_data;
1224 irq_data = irq_get_irq_data(virq);
1227 /* The first entry must have a valid irqchip */
1228 if (!irq_data->chip || IS_ERR(irq_data->chip))
1232 * Validate that the irq_data chain is sane in the presence of
1233 * a hierarchy trimming marker.
1235 for (irqd = irq_data->parent_data; irqd; irq_data = irqd, irqd = irqd->parent_data) {
1236 /* Can't have a valid irqchip after a trim marker */
1237 if (irqd->chip && tail)
1240 /* Can't have an empty irqchip before a trim marker */
1241 if (!irqd->chip && !tail)
1244 if (IS_ERR(irqd->chip)) {
1245 /* Only -ENOTCONN is a valid trim marker */
1246 if (PTR_ERR(irqd->chip) != -ENOTCONN)
1253 /* No trim marker, nothing to do */
1257 pr_info("IRQ%d: trimming hierarchy from %s\n",
1258 virq, tail->parent_data->domain->name);
1260 /* Sever the inner part of the hierarchy... */
1262 tail = tail->parent_data;
1263 irqd->parent_data = NULL;
1264 __irq_domain_free_hierarchy(tail);
1269 static int irq_domain_alloc_irq_data(struct irq_domain *domain,
1270 unsigned int virq, unsigned int nr_irqs)
1272 struct irq_data *irq_data;
1273 struct irq_domain *parent;
1276 /* The outermost irq_data is embedded in struct irq_desc */
1277 for (i = 0; i < nr_irqs; i++) {
1278 irq_data = irq_get_irq_data(virq + i);
1279 irq_data->domain = domain;
1281 for (parent = domain->parent; parent; parent = parent->parent) {
1282 irq_data = irq_domain_insert_irq_data(parent, irq_data);
1284 irq_domain_free_irq_data(virq, i + 1);
1294 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1295 * @domain: domain to match
1296 * @virq: IRQ number to get irq_data
1298 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1301 struct irq_data *irq_data;
1303 for (irq_data = irq_get_irq_data(virq); irq_data;
1304 irq_data = irq_data->parent_data)
1305 if (irq_data->domain == domain)
1310 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1313 * irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain
1314 * @domain: Interrupt domain to match
1316 * @hwirq: The hwirq number
1317 * @chip: The associated interrupt chip
1318 * @chip_data: The associated chip data
1320 int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq,
1321 irq_hw_number_t hwirq, struct irq_chip *chip,
1324 struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq);
1329 irq_data->hwirq = hwirq;
1330 irq_data->chip = chip ? chip : &no_irq_chip;
1331 irq_data->chip_data = chip_data;
1335 EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip);
1338 * irq_domain_set_info - Set the complete data for a @virq in @domain
1339 * @domain: Interrupt domain to match
1341 * @hwirq: The hardware interrupt number
1342 * @chip: The associated interrupt chip
1343 * @chip_data: The associated interrupt chip data
1344 * @handler: The interrupt flow handler
1345 * @handler_data: The interrupt flow handler data
1346 * @handler_name: The interrupt handler name
1348 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1349 irq_hw_number_t hwirq, struct irq_chip *chip,
1350 void *chip_data, irq_flow_handler_t handler,
1351 void *handler_data, const char *handler_name)
1353 irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data);
1354 __irq_set_handler(virq, handler, 0, handler_name);
1355 irq_set_handler_data(virq, handler_data);
1357 EXPORT_SYMBOL(irq_domain_set_info);
1360 * irq_domain_free_irqs_common - Clear irq_data and free the parent
1361 * @domain: Interrupt domain to match
1362 * @virq: IRQ number to start with
1363 * @nr_irqs: The number of irqs to free
1365 void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq,
1366 unsigned int nr_irqs)
1368 struct irq_data *irq_data;
1371 for (i = 0; i < nr_irqs; i++) {
1372 irq_data = irq_domain_get_irq_data(domain, virq + i);
1374 irq_domain_reset_irq_data(irq_data);
1376 irq_domain_free_irqs_parent(domain, virq, nr_irqs);
1378 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_common);
1381 * irq_domain_free_irqs_top - Clear handler and handler data, clear irqdata and free parent
1382 * @domain: Interrupt domain to match
1383 * @virq: IRQ number to start with
1384 * @nr_irqs: The number of irqs to free
1386 void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq,
1387 unsigned int nr_irqs)
1391 for (i = 0; i < nr_irqs; i++) {
1392 irq_set_handler_data(virq + i, NULL);
1393 irq_set_handler(virq + i, NULL);
1395 irq_domain_free_irqs_common(domain, virq, nr_irqs);
1398 static void irq_domain_free_irqs_hierarchy(struct irq_domain *domain,
1399 unsigned int irq_base,
1400 unsigned int nr_irqs)
1404 if (!domain->ops->free)
1407 for (i = 0; i < nr_irqs; i++) {
1408 if (irq_domain_get_irq_data(domain, irq_base + i))
1409 domain->ops->free(domain, irq_base + i, 1);
1413 int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,
1414 unsigned int irq_base,
1415 unsigned int nr_irqs, void *arg)
1417 if (!domain->ops->alloc) {
1418 pr_debug("domain->ops->alloc() is NULL\n");
1422 return domain->ops->alloc(domain, irq_base, nr_irqs, arg);
1426 * __irq_domain_alloc_irqs - Allocate IRQs from domain
1427 * @domain: domain to allocate from
1428 * @irq_base: allocate specified IRQ number if irq_base >= 0
1429 * @nr_irqs: number of IRQs to allocate
1430 * @node: NUMA node id for memory allocation
1431 * @arg: domain specific argument
1432 * @realloc: IRQ descriptors have already been allocated if true
1433 * @affinity: Optional irq affinity mask for multiqueue devices
1435 * Allocate IRQ numbers and initialized all data structures to support
1436 * hierarchy IRQ domains.
1437 * Parameter @realloc is mainly to support legacy IRQs.
1438 * Returns error code or allocated IRQ number
1440 * The whole process to setup an IRQ has been split into two steps.
1441 * The first step, __irq_domain_alloc_irqs(), is to allocate IRQ
1442 * descriptor and required hardware resources. The second step,
1443 * irq_domain_activate_irq(), is to program the hardware with preallocated
1444 * resources. In this way, it's easier to rollback when failing to
1445 * allocate resources.
1447 int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
1448 unsigned int nr_irqs, int node, void *arg,
1449 bool realloc, const struct irq_affinity_desc *affinity)
1453 if (domain == NULL) {
1454 domain = irq_default_domain;
1455 if (WARN(!domain, "domain is NULL; cannot allocate IRQ\n"))
1459 if (realloc && irq_base >= 0) {
1462 virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node,
1465 pr_debug("cannot allocate IRQ(base %d, count %d)\n",
1471 if (irq_domain_alloc_irq_data(domain, virq, nr_irqs)) {
1472 pr_debug("cannot allocate memory for IRQ%d\n", virq);
1477 mutex_lock(&irq_domain_mutex);
1478 ret = irq_domain_alloc_irqs_hierarchy(domain, virq, nr_irqs, arg);
1480 mutex_unlock(&irq_domain_mutex);
1481 goto out_free_irq_data;
1484 for (i = 0; i < nr_irqs; i++) {
1485 ret = irq_domain_trim_hierarchy(virq + i);
1487 mutex_unlock(&irq_domain_mutex);
1488 goto out_free_irq_data;
1492 for (i = 0; i < nr_irqs; i++)
1493 irq_domain_insert_irq(virq + i);
1494 mutex_unlock(&irq_domain_mutex);
1499 irq_domain_free_irq_data(virq, nr_irqs);
1501 irq_free_descs(virq, nr_irqs);
1505 /* The irq_data was moved, fix the revmap to refer to the new location */
1506 static void irq_domain_fix_revmap(struct irq_data *d)
1510 if (irq_domain_is_nomap(d->domain))
1513 /* Fix up the revmap. */
1514 mutex_lock(&d->domain->revmap_mutex);
1515 if (d->hwirq < d->domain->revmap_size) {
1516 /* Not using radix tree */
1517 rcu_assign_pointer(d->domain->revmap[d->hwirq], d);
1519 slot = radix_tree_lookup_slot(&d->domain->revmap_tree, d->hwirq);
1521 radix_tree_replace_slot(&d->domain->revmap_tree, slot, d);
1523 mutex_unlock(&d->domain->revmap_mutex);
1527 * irq_domain_push_irq() - Push a domain in to the top of a hierarchy.
1528 * @domain: Domain to push.
1529 * @virq: Irq to push the domain in to.
1530 * @arg: Passed to the irq_domain_ops alloc() function.
1532 * For an already existing irqdomain hierarchy, as might be obtained
1533 * via a call to pci_enable_msix(), add an additional domain to the
1534 * head of the processing chain. Must be called before request_irq()
1537 int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg)
1539 struct irq_data *child_irq_data;
1540 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1541 struct irq_desc *desc;
1545 * Check that no action has been set, which indicates the virq
1546 * is in a state where this function doesn't have to deal with
1547 * races between interrupt handling and maintaining the
1548 * hierarchy. This will catch gross misuse. Attempting to
1549 * make the check race free would require holding locks across
1550 * calls to struct irq_domain_ops->alloc(), which could lead
1551 * to deadlock, so we just do a simple check before starting.
1553 desc = irq_to_desc(virq);
1556 if (WARN_ON(desc->action))
1562 if (WARN_ON(!irq_domain_is_hierarchy(domain)))
1568 if (domain->parent != root_irq_data->domain)
1571 child_irq_data = kzalloc_node(sizeof(*child_irq_data), GFP_KERNEL,
1572 irq_data_get_node(root_irq_data));
1573 if (!child_irq_data)
1576 mutex_lock(&irq_domain_mutex);
1578 /* Copy the original irq_data. */
1579 *child_irq_data = *root_irq_data;
1582 * Overwrite the root_irq_data, which is embedded in struct
1583 * irq_desc, with values for this domain.
1585 root_irq_data->parent_data = child_irq_data;
1586 root_irq_data->domain = domain;
1587 root_irq_data->mask = 0;
1588 root_irq_data->hwirq = 0;
1589 root_irq_data->chip = NULL;
1590 root_irq_data->chip_data = NULL;
1592 /* May (probably does) set hwirq, chip, etc. */
1593 rv = irq_domain_alloc_irqs_hierarchy(domain, virq, 1, arg);
1595 /* Restore the original irq_data. */
1596 *root_irq_data = *child_irq_data;
1597 kfree(child_irq_data);
1601 irq_domain_fix_revmap(child_irq_data);
1602 irq_domain_set_mapping(domain, root_irq_data->hwirq, root_irq_data);
1605 mutex_unlock(&irq_domain_mutex);
1609 EXPORT_SYMBOL_GPL(irq_domain_push_irq);
1612 * irq_domain_pop_irq() - Remove a domain from the top of a hierarchy.
1613 * @domain: Domain to remove.
1614 * @virq: Irq to remove the domain from.
1616 * Undo the effects of a call to irq_domain_push_irq(). Must be
1617 * called either before request_irq() or after free_irq().
1619 int irq_domain_pop_irq(struct irq_domain *domain, int virq)
1621 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1622 struct irq_data *child_irq_data;
1623 struct irq_data *tmp_irq_data;
1624 struct irq_desc *desc;
1627 * Check that no action is set, which indicates the virq is in
1628 * a state where this function doesn't have to deal with races
1629 * between interrupt handling and maintaining the hierarchy.
1630 * This will catch gross misuse. Attempting to make the check
1631 * race free would require holding locks across calls to
1632 * struct irq_domain_ops->free(), which could lead to
1633 * deadlock, so we just do a simple check before starting.
1635 desc = irq_to_desc(virq);
1638 if (WARN_ON(desc->action))
1647 tmp_irq_data = irq_domain_get_irq_data(domain, virq);
1649 /* We can only "pop" if this domain is at the top of the list */
1650 if (WARN_ON(root_irq_data != tmp_irq_data))
1653 if (WARN_ON(root_irq_data->domain != domain))
1656 child_irq_data = root_irq_data->parent_data;
1657 if (WARN_ON(!child_irq_data))
1660 mutex_lock(&irq_domain_mutex);
1662 root_irq_data->parent_data = NULL;
1664 irq_domain_clear_mapping(domain, root_irq_data->hwirq);
1665 irq_domain_free_irqs_hierarchy(domain, virq, 1);
1667 /* Restore the original irq_data. */
1668 *root_irq_data = *child_irq_data;
1670 irq_domain_fix_revmap(root_irq_data);
1672 mutex_unlock(&irq_domain_mutex);
1674 kfree(child_irq_data);
1678 EXPORT_SYMBOL_GPL(irq_domain_pop_irq);
1681 * irq_domain_free_irqs - Free IRQ number and associated data structures
1682 * @virq: base IRQ number
1683 * @nr_irqs: number of IRQs to free
1685 void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs)
1687 struct irq_data *data = irq_get_irq_data(virq);
1690 if (WARN(!data || !data->domain || !data->domain->ops->free,
1691 "NULL pointer, cannot free irq\n"))
1694 mutex_lock(&irq_domain_mutex);
1695 for (i = 0; i < nr_irqs; i++)
1696 irq_domain_remove_irq(virq + i);
1697 irq_domain_free_irqs_hierarchy(data->domain, virq, nr_irqs);
1698 mutex_unlock(&irq_domain_mutex);
1700 irq_domain_free_irq_data(virq, nr_irqs);
1701 irq_free_descs(virq, nr_irqs);
1705 * irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain
1706 * @domain: Domain below which interrupts must be allocated
1707 * @irq_base: Base IRQ number
1708 * @nr_irqs: Number of IRQs to allocate
1709 * @arg: Allocation data (arch/domain specific)
1711 int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
1712 unsigned int irq_base, unsigned int nr_irqs,
1715 if (!domain->parent)
1718 return irq_domain_alloc_irqs_hierarchy(domain->parent, irq_base,
1721 EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent);
1724 * irq_domain_free_irqs_parent - Free interrupts from parent domain
1725 * @domain: Domain below which interrupts must be freed
1726 * @irq_base: Base IRQ number
1727 * @nr_irqs: Number of IRQs to free
1729 void irq_domain_free_irqs_parent(struct irq_domain *domain,
1730 unsigned int irq_base, unsigned int nr_irqs)
1732 if (!domain->parent)
1735 irq_domain_free_irqs_hierarchy(domain->parent, irq_base, nr_irqs);
1737 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent);
1739 static void __irq_domain_deactivate_irq(struct irq_data *irq_data)
1741 if (irq_data && irq_data->domain) {
1742 struct irq_domain *domain = irq_data->domain;
1744 if (domain->ops->deactivate)
1745 domain->ops->deactivate(domain, irq_data);
1746 if (irq_data->parent_data)
1747 __irq_domain_deactivate_irq(irq_data->parent_data);
1751 static int __irq_domain_activate_irq(struct irq_data *irqd, bool reserve)
1755 if (irqd && irqd->domain) {
1756 struct irq_domain *domain = irqd->domain;
1758 if (irqd->parent_data)
1759 ret = __irq_domain_activate_irq(irqd->parent_data,
1761 if (!ret && domain->ops->activate) {
1762 ret = domain->ops->activate(domain, irqd, reserve);
1763 /* Rollback in case of error */
1764 if (ret && irqd->parent_data)
1765 __irq_domain_deactivate_irq(irqd->parent_data);
1772 * irq_domain_activate_irq - Call domain_ops->activate recursively to activate
1774 * @irq_data: Outermost irq_data associated with interrupt
1775 * @reserve: If set only reserve an interrupt vector instead of assigning one
1777 * This is the second step to call domain_ops->activate to program interrupt
1778 * controllers, so the interrupt could actually get delivered.
1780 int irq_domain_activate_irq(struct irq_data *irq_data, bool reserve)
1784 if (!irqd_is_activated(irq_data))
1785 ret = __irq_domain_activate_irq(irq_data, reserve);
1787 irqd_set_activated(irq_data);
1792 * irq_domain_deactivate_irq - Call domain_ops->deactivate recursively to
1793 * deactivate interrupt
1794 * @irq_data: outermost irq_data associated with interrupt
1796 * It calls domain_ops->deactivate to program interrupt controllers to disable
1797 * interrupt delivery.
1799 void irq_domain_deactivate_irq(struct irq_data *irq_data)
1801 if (irqd_is_activated(irq_data)) {
1802 __irq_domain_deactivate_irq(irq_data);
1803 irqd_clr_activated(irq_data);
1807 static void irq_domain_check_hierarchy(struct irq_domain *domain)
1809 /* Hierarchy irq_domains must implement callback alloc() */
1810 if (domain->ops->alloc)
1811 domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY;
1815 * irq_domain_hierarchical_is_msi_remap - Check if the domain or any
1816 * parent has MSI remapping support
1817 * @domain: domain pointer
1819 bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain)
1821 for (; domain; domain = domain->parent) {
1822 if (irq_domain_is_msi_remap(domain))
1827 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1829 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1830 * @domain: domain to match
1831 * @virq: IRQ number to get irq_data
1833 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1836 struct irq_data *irq_data = irq_get_irq_data(virq);
1838 return (irq_data && irq_data->domain == domain) ? irq_data : NULL;
1840 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1843 * irq_domain_set_info - Set the complete data for a @virq in @domain
1844 * @domain: Interrupt domain to match
1846 * @hwirq: The hardware interrupt number
1847 * @chip: The associated interrupt chip
1848 * @chip_data: The associated interrupt chip data
1849 * @handler: The interrupt flow handler
1850 * @handler_data: The interrupt flow handler data
1851 * @handler_name: The interrupt handler name
1853 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1854 irq_hw_number_t hwirq, struct irq_chip *chip,
1855 void *chip_data, irq_flow_handler_t handler,
1856 void *handler_data, const char *handler_name)
1858 irq_set_chip_and_handler_name(virq, chip, handler, handler_name);
1859 irq_set_chip_data(virq, chip_data);
1860 irq_set_handler_data(virq, handler_data);
1863 static void irq_domain_check_hierarchy(struct irq_domain *domain)
1866 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1868 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
1869 static struct dentry *domain_dir;
1872 irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind)
1874 seq_printf(m, "%*sname: %s\n", ind, "", d->name);
1875 seq_printf(m, "%*ssize: %u\n", ind + 1, "", d->revmap_size);
1876 seq_printf(m, "%*smapped: %u\n", ind + 1, "", d->mapcount);
1877 seq_printf(m, "%*sflags: 0x%08x\n", ind +1 , "", d->flags);
1878 if (d->ops && d->ops->debug_show)
1879 d->ops->debug_show(m, d, NULL, ind + 1);
1880 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1883 seq_printf(m, "%*sparent: %s\n", ind + 1, "", d->parent->name);
1884 irq_domain_debug_show_one(m, d->parent, ind + 4);
1888 static int irq_domain_debug_show(struct seq_file *m, void *p)
1890 struct irq_domain *d = m->private;
1892 /* Default domain? Might be NULL */
1894 if (!irq_default_domain)
1896 d = irq_default_domain;
1898 irq_domain_debug_show_one(m, d, 0);
1901 DEFINE_SHOW_ATTRIBUTE(irq_domain_debug);
1903 static void debugfs_add_domain_dir(struct irq_domain *d)
1905 if (!d->name || !domain_dir)
1907 debugfs_create_file(d->name, 0444, domain_dir, d,
1908 &irq_domain_debug_fops);
1911 static void debugfs_remove_domain_dir(struct irq_domain *d)
1913 debugfs_remove(debugfs_lookup(d->name, domain_dir));
1916 void __init irq_domain_debugfs_init(struct dentry *root)
1918 struct irq_domain *d;
1920 domain_dir = debugfs_create_dir("domains", root);
1922 debugfs_create_file("default", 0444, domain_dir, NULL,
1923 &irq_domain_debug_fops);
1924 mutex_lock(&irq_domain_mutex);
1925 list_for_each_entry(d, &irq_domain_list, link)
1926 debugfs_add_domain_dir(d);
1927 mutex_unlock(&irq_domain_mutex);