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 domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size),
150 GFP_KERNEL, of_node_to_nid(to_of_node(fwnode)));
154 if (is_fwnode_irqchip(fwnode)) {
155 fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
157 switch (fwid->type) {
158 case IRQCHIP_FWNODE_NAMED:
159 case IRQCHIP_FWNODE_NAMED_ID:
160 domain->fwnode = fwnode;
161 domain->name = kstrdup(fwid->name, GFP_KERNEL);
166 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
169 domain->fwnode = fwnode;
170 domain->name = fwid->name;
173 } else if (is_of_node(fwnode) || is_acpi_device_node(fwnode) ||
174 is_software_node(fwnode)) {
178 * fwnode paths contain '/', which debugfs is legitimately
179 * unhappy about. Replace them with ':', which does
180 * the trick and is not as offensive as '\'...
182 name = kasprintf(GFP_KERNEL, "%pfw", fwnode);
188 strreplace(name, '/', ':');
191 domain->fwnode = fwnode;
192 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
197 pr_err("Invalid fwnode type for irqdomain\n");
198 domain->name = kasprintf(GFP_KERNEL, "unknown-%d",
199 atomic_inc_return(&unknown_domains));
204 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
207 fwnode_handle_get(fwnode);
208 fwnode_dev_initialized(fwnode, true);
211 INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
212 mutex_init(&domain->revmap_tree_mutex);
214 domain->host_data = host_data;
215 domain->hwirq_max = hwirq_max;
216 domain->revmap_size = size;
217 domain->revmap_direct_max_irq = direct_max;
218 irq_domain_check_hierarchy(domain);
220 mutex_lock(&irq_domain_mutex);
221 debugfs_add_domain_dir(domain);
222 list_add(&domain->link, &irq_domain_list);
223 mutex_unlock(&irq_domain_mutex);
225 pr_debug("Added domain %s\n", domain->name);
228 EXPORT_SYMBOL_GPL(__irq_domain_add);
231 * irq_domain_remove() - Remove an irq domain.
232 * @domain: domain to remove
234 * This routine is used to remove an irq domain. The caller must ensure
235 * that all mappings within the domain have been disposed of prior to
236 * use, depending on the revmap type.
238 void irq_domain_remove(struct irq_domain *domain)
240 mutex_lock(&irq_domain_mutex);
241 debugfs_remove_domain_dir(domain);
243 WARN_ON(!radix_tree_empty(&domain->revmap_tree));
245 list_del(&domain->link);
248 * If the going away domain is the default one, reset it.
250 if (unlikely(irq_default_domain == domain))
251 irq_set_default_host(NULL);
253 mutex_unlock(&irq_domain_mutex);
255 pr_debug("Removed domain %s\n", domain->name);
257 fwnode_dev_initialized(domain->fwnode, false);
258 fwnode_handle_put(domain->fwnode);
259 if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
263 EXPORT_SYMBOL_GPL(irq_domain_remove);
265 void irq_domain_update_bus_token(struct irq_domain *domain,
266 enum irq_domain_bus_token bus_token)
270 if (domain->bus_token == bus_token)
273 mutex_lock(&irq_domain_mutex);
275 domain->bus_token = bus_token;
277 name = kasprintf(GFP_KERNEL, "%s-%d", domain->name, bus_token);
279 mutex_unlock(&irq_domain_mutex);
283 debugfs_remove_domain_dir(domain);
285 if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
288 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
291 debugfs_add_domain_dir(domain);
293 mutex_unlock(&irq_domain_mutex);
295 EXPORT_SYMBOL_GPL(irq_domain_update_bus_token);
298 * irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs
299 * @of_node: pointer to interrupt controller's device tree node.
300 * @size: total number of irqs in mapping
301 * @first_irq: first number of irq block assigned to the domain,
302 * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then
303 * pre-map all of the irqs in the domain to virqs starting at first_irq.
304 * @ops: domain callbacks
305 * @host_data: Controller private data pointer
307 * Allocates an irq_domain, and optionally if first_irq is positive then also
308 * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq.
310 * This is intended to implement the expected behaviour for most
311 * interrupt controllers. If device tree is used, then first_irq will be 0 and
312 * irqs get mapped dynamically on the fly. However, if the controller requires
313 * static virq assignments (non-DT boot) then it will set that up correctly.
315 struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
317 unsigned int first_irq,
318 const struct irq_domain_ops *ops,
321 struct irq_domain *domain;
323 domain = __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data);
328 if (IS_ENABLED(CONFIG_SPARSE_IRQ)) {
329 /* attempt to allocated irq_descs */
330 int rc = irq_alloc_descs(first_irq, first_irq, size,
331 of_node_to_nid(of_node));
333 pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
336 irq_domain_associate_many(domain, first_irq, 0, size);
341 EXPORT_SYMBOL_GPL(irq_domain_add_simple);
344 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain.
345 * @of_node: pointer to interrupt controller's device tree node.
346 * @size: total number of irqs in legacy mapping
347 * @first_irq: first number of irq block assigned to the domain
348 * @first_hwirq: first hwirq number to use for the translation. Should normally
349 * be '0', but a positive integer can be used if the effective
350 * hwirqs numbering does not begin at zero.
351 * @ops: map/unmap domain callbacks
352 * @host_data: Controller private data pointer
354 * Note: the map() callback will be called before this function returns
355 * for all legacy interrupts except 0 (which is always the invalid irq for
356 * a legacy controller).
358 struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
360 unsigned int first_irq,
361 irq_hw_number_t first_hwirq,
362 const struct irq_domain_ops *ops,
365 return irq_domain_create_legacy(of_node_to_fwnode(of_node), size,
366 first_irq, first_hwirq, ops, host_data);
368 EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
370 struct irq_domain *irq_domain_create_legacy(struct fwnode_handle *fwnode,
372 unsigned int first_irq,
373 irq_hw_number_t first_hwirq,
374 const struct irq_domain_ops *ops,
377 struct irq_domain *domain;
379 domain = __irq_domain_add(fwnode, first_hwirq + size, first_hwirq + size, 0, ops, host_data);
381 irq_domain_associate_many(domain, first_irq, first_hwirq, size);
385 EXPORT_SYMBOL_GPL(irq_domain_create_legacy);
388 * irq_find_matching_fwspec() - Locates a domain for a given fwspec
389 * @fwspec: FW specifier for an interrupt
390 * @bus_token: domain-specific data
392 struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
393 enum irq_domain_bus_token bus_token)
395 struct irq_domain *h, *found = NULL;
396 struct fwnode_handle *fwnode = fwspec->fwnode;
399 /* We might want to match the legacy controller last since
400 * it might potentially be set to match all interrupts in
401 * the absence of a device node. This isn't a problem so far
404 * bus_token == DOMAIN_BUS_ANY matches any domain, any other
405 * values must generate an exact match for the domain to be
408 mutex_lock(&irq_domain_mutex);
409 list_for_each_entry(h, &irq_domain_list, link) {
410 if (h->ops->select && fwspec->param_count)
411 rc = h->ops->select(h, fwspec, bus_token);
412 else if (h->ops->match)
413 rc = h->ops->match(h, to_of_node(fwnode), bus_token);
415 rc = ((fwnode != NULL) && (h->fwnode == fwnode) &&
416 ((bus_token == DOMAIN_BUS_ANY) ||
417 (h->bus_token == bus_token)));
424 mutex_unlock(&irq_domain_mutex);
427 EXPORT_SYMBOL_GPL(irq_find_matching_fwspec);
430 * irq_domain_check_msi_remap - Check whether all MSI irq domains implement
433 * Return: false if any MSI irq domain does not support IRQ remapping,
434 * true otherwise (including if there is no MSI irq domain)
436 bool irq_domain_check_msi_remap(void)
438 struct irq_domain *h;
441 mutex_lock(&irq_domain_mutex);
442 list_for_each_entry(h, &irq_domain_list, link) {
443 if (irq_domain_is_msi(h) &&
444 !irq_domain_hierarchical_is_msi_remap(h)) {
449 mutex_unlock(&irq_domain_mutex);
452 EXPORT_SYMBOL_GPL(irq_domain_check_msi_remap);
455 * irq_set_default_host() - Set a "default" irq domain
456 * @domain: default domain pointer
458 * For convenience, it's possible to set a "default" domain that will be used
459 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
460 * platforms that want to manipulate a few hard coded interrupt numbers that
461 * aren't properly represented in the device-tree.
463 void irq_set_default_host(struct irq_domain *domain)
465 pr_debug("Default domain set to @0x%p\n", domain);
467 irq_default_domain = domain;
469 EXPORT_SYMBOL_GPL(irq_set_default_host);
472 * irq_get_default_host() - Retrieve the "default" irq domain
474 * Returns: the default domain, if any.
476 * Modern code should never use this. This should only be used on
477 * systems that cannot implement a firmware->fwnode mapping (which
478 * both DT and ACPI provide).
480 struct irq_domain *irq_get_default_host(void)
482 return irq_default_domain;
485 static void irq_domain_clear_mapping(struct irq_domain *domain,
486 irq_hw_number_t hwirq)
488 if (hwirq < domain->revmap_size) {
489 domain->linear_revmap[hwirq] = 0;
491 mutex_lock(&domain->revmap_tree_mutex);
492 radix_tree_delete(&domain->revmap_tree, hwirq);
493 mutex_unlock(&domain->revmap_tree_mutex);
497 static void irq_domain_set_mapping(struct irq_domain *domain,
498 irq_hw_number_t hwirq,
499 struct irq_data *irq_data)
501 if (hwirq < domain->revmap_size) {
502 domain->linear_revmap[hwirq] = irq_data->irq;
504 mutex_lock(&domain->revmap_tree_mutex);
505 radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
506 mutex_unlock(&domain->revmap_tree_mutex);
510 static void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
512 struct irq_data *irq_data = irq_get_irq_data(irq);
513 irq_hw_number_t hwirq;
515 if (WARN(!irq_data || irq_data->domain != domain,
516 "virq%i doesn't exist; cannot disassociate\n", irq))
519 hwirq = irq_data->hwirq;
520 irq_set_status_flags(irq, IRQ_NOREQUEST);
522 /* remove chip and handler */
523 irq_set_chip_and_handler(irq, NULL, NULL);
525 /* Make sure it's completed */
526 synchronize_irq(irq);
528 /* Tell the PIC about it */
529 if (domain->ops->unmap)
530 domain->ops->unmap(domain, irq);
533 irq_data->domain = NULL;
537 /* Clear reverse map for this hwirq */
538 irq_domain_clear_mapping(domain, hwirq);
541 int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
542 irq_hw_number_t hwirq)
544 struct irq_data *irq_data = irq_get_irq_data(virq);
547 if (WARN(hwirq >= domain->hwirq_max,
548 "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name))
550 if (WARN(!irq_data, "error: virq%i is not allocated", virq))
552 if (WARN(irq_data->domain, "error: virq%i is already associated", virq))
555 mutex_lock(&irq_domain_mutex);
556 irq_data->hwirq = hwirq;
557 irq_data->domain = domain;
558 if (domain->ops->map) {
559 ret = domain->ops->map(domain, virq, hwirq);
562 * If map() returns -EPERM, this interrupt is protected
563 * by the firmware or some other service and shall not
564 * be mapped. Don't bother telling the user about it.
567 pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n",
568 domain->name, hwirq, virq, ret);
570 irq_data->domain = NULL;
572 mutex_unlock(&irq_domain_mutex);
576 /* If not already assigned, give the domain the chip's name */
577 if (!domain->name && irq_data->chip)
578 domain->name = irq_data->chip->name;
582 irq_domain_set_mapping(domain, hwirq, irq_data);
583 mutex_unlock(&irq_domain_mutex);
585 irq_clear_status_flags(virq, IRQ_NOREQUEST);
589 EXPORT_SYMBOL_GPL(irq_domain_associate);
591 void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
592 irq_hw_number_t hwirq_base, int count)
594 struct device_node *of_node;
597 of_node = irq_domain_get_of_node(domain);
598 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
599 of_node_full_name(of_node), irq_base, (int)hwirq_base, count);
601 for (i = 0; i < count; i++) {
602 irq_domain_associate(domain, irq_base + i, hwirq_base + i);
605 EXPORT_SYMBOL_GPL(irq_domain_associate_many);
608 * irq_create_direct_mapping() - Allocate an irq for direct mapping
609 * @domain: domain to allocate the irq for or NULL for default domain
611 * This routine is used for irq controllers which can choose the hardware
612 * interrupt numbers they generate. In such a case it's simplest to use
613 * the linux irq as the hardware interrupt number. It still uses the linear
614 * or radix tree to store the mapping, but the irq controller can optimize
615 * the revmap path by using the hwirq directly.
617 unsigned int irq_create_direct_mapping(struct irq_domain *domain)
619 struct device_node *of_node;
623 domain = irq_default_domain;
625 of_node = irq_domain_get_of_node(domain);
626 virq = irq_alloc_desc_from(1, of_node_to_nid(of_node));
628 pr_debug("create_direct virq allocation failed\n");
631 if (virq >= domain->revmap_direct_max_irq) {
632 pr_err("ERROR: no free irqs available below %i maximum\n",
633 domain->revmap_direct_max_irq);
637 pr_debug("create_direct obtained virq %d\n", virq);
639 if (irq_domain_associate(domain, virq, virq)) {
646 EXPORT_SYMBOL_GPL(irq_create_direct_mapping);
649 * irq_create_mapping_affinity() - Map a hardware interrupt into linux irq space
650 * @domain: domain owning this hardware interrupt or NULL for default domain
651 * @hwirq: hardware irq number in that domain space
652 * @affinity: irq affinity
654 * Only one mapping per hardware interrupt is permitted. Returns a linux
656 * If the sense/trigger is to be specified, set_irq_type() should be called
657 * on the number returned from that call.
659 unsigned int irq_create_mapping_affinity(struct irq_domain *domain,
660 irq_hw_number_t hwirq,
661 const struct irq_affinity_desc *affinity)
663 struct device_node *of_node;
666 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
668 /* Look for default domain if necessary */
670 domain = irq_default_domain;
671 if (domain == NULL) {
672 WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq);
675 pr_debug("-> using domain @%p\n", domain);
677 of_node = irq_domain_get_of_node(domain);
679 /* Check if mapping already exists */
680 virq = irq_find_mapping(domain, hwirq);
682 pr_debug("-> existing mapping on virq %d\n", virq);
686 /* Allocate a virtual interrupt number */
687 virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node),
690 pr_debug("-> virq allocation failed\n");
694 if (irq_domain_associate(domain, virq, hwirq)) {
699 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
700 hwirq, of_node_full_name(of_node), virq);
704 EXPORT_SYMBOL_GPL(irq_create_mapping_affinity);
707 * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs
708 * @domain: domain owning the interrupt range
709 * @irq_base: beginning of linux IRQ range
710 * @hwirq_base: beginning of hardware IRQ range
711 * @count: Number of interrupts to map
713 * This routine is used for allocating and mapping a range of hardware
714 * irqs to linux irqs where the linux irq numbers are at pre-defined
715 * locations. For use by controllers that already have static mappings
716 * to insert in to the domain.
718 * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time
721 * 0 is returned upon success, while any failure to establish a static
722 * mapping is treated as an error.
724 int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base,
725 irq_hw_number_t hwirq_base, int count)
727 struct device_node *of_node;
730 of_node = irq_domain_get_of_node(domain);
731 ret = irq_alloc_descs(irq_base, irq_base, count,
732 of_node_to_nid(of_node));
733 if (unlikely(ret < 0))
736 irq_domain_associate_many(domain, irq_base, hwirq_base, count);
739 EXPORT_SYMBOL_GPL(irq_create_strict_mappings);
741 static int irq_domain_translate(struct irq_domain *d,
742 struct irq_fwspec *fwspec,
743 irq_hw_number_t *hwirq, unsigned int *type)
745 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
746 if (d->ops->translate)
747 return d->ops->translate(d, fwspec, hwirq, type);
750 return d->ops->xlate(d, to_of_node(fwspec->fwnode),
751 fwspec->param, fwspec->param_count,
754 /* If domain has no translation, then we assume interrupt line */
755 *hwirq = fwspec->param[0];
759 static void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,
761 struct irq_fwspec *fwspec)
765 fwspec->fwnode = of_node_to_fwnode(np);
766 fwspec->param_count = count;
768 for (i = 0; i < count; i++)
769 fwspec->param[i] = args[i];
772 unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
774 struct irq_domain *domain;
775 struct irq_data *irq_data;
776 irq_hw_number_t hwirq;
777 unsigned int type = IRQ_TYPE_NONE;
780 if (fwspec->fwnode) {
781 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_WIRED);
783 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_ANY);
785 domain = irq_default_domain;
789 pr_warn("no irq domain found for %s !\n",
790 of_node_full_name(to_of_node(fwspec->fwnode)));
794 if (irq_domain_translate(domain, fwspec, &hwirq, &type))
798 * WARN if the irqchip returns a type with bits
799 * outside the sense mask set and clear these bits.
801 if (WARN_ON(type & ~IRQ_TYPE_SENSE_MASK))
802 type &= IRQ_TYPE_SENSE_MASK;
805 * If we've already configured this interrupt,
806 * don't do it again, or hell will break loose.
808 virq = irq_find_mapping(domain, hwirq);
811 * If the trigger type is not specified or matches the
812 * current trigger type then we are done so return the
815 if (type == IRQ_TYPE_NONE || type == irq_get_trigger_type(virq))
819 * If the trigger type has not been set yet, then set
820 * it now and return the interrupt number.
822 if (irq_get_trigger_type(virq) == IRQ_TYPE_NONE) {
823 irq_data = irq_get_irq_data(virq);
827 irqd_set_trigger_type(irq_data, type);
831 pr_warn("type mismatch, failed to map hwirq-%lu for %s!\n",
832 hwirq, of_node_full_name(to_of_node(fwspec->fwnode)));
836 if (irq_domain_is_hierarchy(domain)) {
837 virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, fwspec);
842 virq = irq_create_mapping(domain, hwirq);
847 irq_data = irq_get_irq_data(virq);
849 if (irq_domain_is_hierarchy(domain))
850 irq_domain_free_irqs(virq, 1);
852 irq_dispose_mapping(virq);
856 /* Store trigger type */
857 irqd_set_trigger_type(irq_data, type);
861 EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping);
863 unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data)
865 struct irq_fwspec fwspec;
867 of_phandle_args_to_fwspec(irq_data->np, irq_data->args,
868 irq_data->args_count, &fwspec);
870 return irq_create_fwspec_mapping(&fwspec);
872 EXPORT_SYMBOL_GPL(irq_create_of_mapping);
875 * irq_dispose_mapping() - Unmap an interrupt
876 * @virq: linux irq number of the interrupt to unmap
878 void irq_dispose_mapping(unsigned int virq)
880 struct irq_data *irq_data = irq_get_irq_data(virq);
881 struct irq_domain *domain;
883 if (!virq || !irq_data)
886 domain = irq_data->domain;
887 if (WARN_ON(domain == NULL))
890 if (irq_domain_is_hierarchy(domain)) {
891 irq_domain_free_irqs(virq, 1);
893 irq_domain_disassociate(domain, virq);
897 EXPORT_SYMBOL_GPL(irq_dispose_mapping);
900 * irq_find_mapping() - Find a linux irq from a hw irq number.
901 * @domain: domain owning this hardware interrupt
902 * @hwirq: hardware irq number in that domain space
904 unsigned int irq_find_mapping(struct irq_domain *domain,
905 irq_hw_number_t hwirq)
907 struct irq_data *data;
909 /* Look for default domain if necessary */
911 domain = irq_default_domain;
915 if (hwirq < domain->revmap_direct_max_irq) {
916 data = irq_domain_get_irq_data(domain, hwirq);
917 if (data && data->hwirq == hwirq)
921 /* Check if the hwirq is in the linear revmap. */
922 if (hwirq < domain->revmap_size)
923 return domain->linear_revmap[hwirq];
926 data = radix_tree_lookup(&domain->revmap_tree, hwirq);
928 return data ? data->irq : 0;
930 EXPORT_SYMBOL_GPL(irq_find_mapping);
933 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
935 * Device Tree IRQ specifier translation function which works with one cell
936 * bindings where the cell value maps directly to the hwirq number.
938 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
939 const u32 *intspec, unsigned int intsize,
940 unsigned long *out_hwirq, unsigned int *out_type)
942 if (WARN_ON(intsize < 1))
944 *out_hwirq = intspec[0];
945 *out_type = IRQ_TYPE_NONE;
948 EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell);
951 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings
953 * Device Tree IRQ specifier translation function which works with two cell
954 * bindings where the cell values map directly to the hwirq number
955 * and linux irq flags.
957 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
958 const u32 *intspec, unsigned int intsize,
959 irq_hw_number_t *out_hwirq, unsigned int *out_type)
961 struct irq_fwspec fwspec;
963 of_phandle_args_to_fwspec(ctrlr, intspec, intsize, &fwspec);
964 return irq_domain_translate_twocell(d, &fwspec, out_hwirq, out_type);
966 EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell);
969 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings
971 * Device Tree IRQ specifier translation function which works with either one
972 * or two cell bindings where the cell values map directly to the hwirq number
973 * and linux irq flags.
975 * Note: don't use this function unless your interrupt controller explicitly
976 * supports both one and two cell bindings. For the majority of controllers
977 * the _onecell() or _twocell() variants above should be used.
979 int irq_domain_xlate_onetwocell(struct irq_domain *d,
980 struct device_node *ctrlr,
981 const u32 *intspec, unsigned int intsize,
982 unsigned long *out_hwirq, unsigned int *out_type)
984 if (WARN_ON(intsize < 1))
986 *out_hwirq = intspec[0];
988 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
990 *out_type = IRQ_TYPE_NONE;
993 EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell);
995 const struct irq_domain_ops irq_domain_simple_ops = {
996 .xlate = irq_domain_xlate_onetwocell,
998 EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
1001 * irq_domain_translate_onecell() - Generic translate for direct one cell
1004 int irq_domain_translate_onecell(struct irq_domain *d,
1005 struct irq_fwspec *fwspec,
1006 unsigned long *out_hwirq,
1007 unsigned int *out_type)
1009 if (WARN_ON(fwspec->param_count < 1))
1011 *out_hwirq = fwspec->param[0];
1012 *out_type = IRQ_TYPE_NONE;
1015 EXPORT_SYMBOL_GPL(irq_domain_translate_onecell);
1018 * irq_domain_translate_twocell() - Generic translate for direct two cell
1021 * Device Tree IRQ specifier translation function which works with two cell
1022 * bindings where the cell values map directly to the hwirq number
1023 * and linux irq flags.
1025 int irq_domain_translate_twocell(struct irq_domain *d,
1026 struct irq_fwspec *fwspec,
1027 unsigned long *out_hwirq,
1028 unsigned int *out_type)
1030 if (WARN_ON(fwspec->param_count < 2))
1032 *out_hwirq = fwspec->param[0];
1033 *out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;
1036 EXPORT_SYMBOL_GPL(irq_domain_translate_twocell);
1038 int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq,
1039 int node, const struct irq_affinity_desc *affinity)
1044 virq = __irq_alloc_descs(virq, virq, cnt, node, THIS_MODULE,
1047 hint = hwirq % nr_irqs;
1050 virq = __irq_alloc_descs(-1, hint, cnt, node, THIS_MODULE,
1052 if (virq <= 0 && hint > 1) {
1053 virq = __irq_alloc_descs(-1, 1, cnt, node, THIS_MODULE,
1062 * irq_domain_reset_irq_data - Clear hwirq, chip and chip_data in @irq_data
1063 * @irq_data: The pointer to irq_data
1065 void irq_domain_reset_irq_data(struct irq_data *irq_data)
1067 irq_data->hwirq = 0;
1068 irq_data->chip = &no_irq_chip;
1069 irq_data->chip_data = NULL;
1071 EXPORT_SYMBOL_GPL(irq_domain_reset_irq_data);
1073 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1075 * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy
1076 * @parent: Parent irq domain to associate with the new domain
1077 * @flags: Irq domain flags associated to the domain
1078 * @size: Size of the domain. See below
1079 * @fwnode: Optional fwnode of the interrupt controller
1080 * @ops: Pointer to the interrupt domain callbacks
1081 * @host_data: Controller private data pointer
1083 * If @size is 0 a tree domain is created, otherwise a linear domain.
1085 * If successful the parent is associated to the new domain and the
1086 * domain flags are set.
1087 * Returns pointer to IRQ domain, or NULL on failure.
1089 struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
1092 struct fwnode_handle *fwnode,
1093 const struct irq_domain_ops *ops,
1096 struct irq_domain *domain;
1099 domain = irq_domain_create_linear(fwnode, size, ops, host_data);
1101 domain = irq_domain_create_tree(fwnode, ops, host_data);
1103 domain->parent = parent;
1104 domain->flags |= flags;
1109 EXPORT_SYMBOL_GPL(irq_domain_create_hierarchy);
1111 static void irq_domain_insert_irq(int virq)
1113 struct irq_data *data;
1115 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1116 struct irq_domain *domain = data->domain;
1119 irq_domain_set_mapping(domain, data->hwirq, data);
1121 /* If not already assigned, give the domain the chip's name */
1122 if (!domain->name && data->chip)
1123 domain->name = data->chip->name;
1126 irq_clear_status_flags(virq, IRQ_NOREQUEST);
1129 static void irq_domain_remove_irq(int virq)
1131 struct irq_data *data;
1133 irq_set_status_flags(virq, IRQ_NOREQUEST);
1134 irq_set_chip_and_handler(virq, NULL, NULL);
1135 synchronize_irq(virq);
1138 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1139 struct irq_domain *domain = data->domain;
1140 irq_hw_number_t hwirq = data->hwirq;
1143 irq_domain_clear_mapping(domain, hwirq);
1147 static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain,
1148 struct irq_data *child)
1150 struct irq_data *irq_data;
1152 irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL,
1153 irq_data_get_node(child));
1155 child->parent_data = irq_data;
1156 irq_data->irq = child->irq;
1157 irq_data->common = child->common;
1158 irq_data->domain = domain;
1164 static void __irq_domain_free_hierarchy(struct irq_data *irq_data)
1166 struct irq_data *tmp;
1170 irq_data = irq_data->parent_data;
1175 static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs)
1177 struct irq_data *irq_data, *tmp;
1180 for (i = 0; i < nr_irqs; i++) {
1181 irq_data = irq_get_irq_data(virq + i);
1182 tmp = irq_data->parent_data;
1183 irq_data->parent_data = NULL;
1184 irq_data->domain = NULL;
1186 __irq_domain_free_hierarchy(tmp);
1191 * irq_domain_disconnect_hierarchy - Mark the first unused level of a hierarchy
1192 * @domain: IRQ domain from which the hierarchy is to be disconnected
1193 * @virq: IRQ number where the hierarchy is to be trimmed
1195 * Marks the @virq level belonging to @domain as disconnected.
1196 * Returns -EINVAL if @virq doesn't have a valid irq_data pointing
1199 * Its only use is to be able to trim levels of hierarchy that do not
1200 * have any real meaning for this interrupt, and that the driver marks
1201 * as such from its .alloc() callback.
1203 int irq_domain_disconnect_hierarchy(struct irq_domain *domain,
1206 struct irq_data *irqd;
1208 irqd = irq_domain_get_irq_data(domain, virq);
1212 irqd->chip = ERR_PTR(-ENOTCONN);
1216 static int irq_domain_trim_hierarchy(unsigned int virq)
1218 struct irq_data *tail, *irqd, *irq_data;
1220 irq_data = irq_get_irq_data(virq);
1223 /* The first entry must have a valid irqchip */
1224 if (!irq_data->chip || IS_ERR(irq_data->chip))
1228 * Validate that the irq_data chain is sane in the presence of
1229 * a hierarchy trimming marker.
1231 for (irqd = irq_data->parent_data; irqd; irq_data = irqd, irqd = irqd->parent_data) {
1232 /* Can't have a valid irqchip after a trim marker */
1233 if (irqd->chip && tail)
1236 /* Can't have an empty irqchip before a trim marker */
1237 if (!irqd->chip && !tail)
1240 if (IS_ERR(irqd->chip)) {
1241 /* Only -ENOTCONN is a valid trim marker */
1242 if (PTR_ERR(irqd->chip) != -ENOTCONN)
1249 /* No trim marker, nothing to do */
1253 pr_info("IRQ%d: trimming hierarchy from %s\n",
1254 virq, tail->parent_data->domain->name);
1256 /* Sever the inner part of the hierarchy... */
1258 tail = tail->parent_data;
1259 irqd->parent_data = NULL;
1260 __irq_domain_free_hierarchy(tail);
1265 static int irq_domain_alloc_irq_data(struct irq_domain *domain,
1266 unsigned int virq, unsigned int nr_irqs)
1268 struct irq_data *irq_data;
1269 struct irq_domain *parent;
1272 /* The outermost irq_data is embedded in struct irq_desc */
1273 for (i = 0; i < nr_irqs; i++) {
1274 irq_data = irq_get_irq_data(virq + i);
1275 irq_data->domain = domain;
1277 for (parent = domain->parent; parent; parent = parent->parent) {
1278 irq_data = irq_domain_insert_irq_data(parent, irq_data);
1280 irq_domain_free_irq_data(virq, i + 1);
1290 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1291 * @domain: domain to match
1292 * @virq: IRQ number to get irq_data
1294 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1297 struct irq_data *irq_data;
1299 for (irq_data = irq_get_irq_data(virq); irq_data;
1300 irq_data = irq_data->parent_data)
1301 if (irq_data->domain == domain)
1306 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1309 * irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain
1310 * @domain: Interrupt domain to match
1312 * @hwirq: The hwirq number
1313 * @chip: The associated interrupt chip
1314 * @chip_data: The associated chip data
1316 int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq,
1317 irq_hw_number_t hwirq, struct irq_chip *chip,
1320 struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq);
1325 irq_data->hwirq = hwirq;
1326 irq_data->chip = chip ? chip : &no_irq_chip;
1327 irq_data->chip_data = chip_data;
1331 EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip);
1334 * irq_domain_set_info - Set the complete data for a @virq in @domain
1335 * @domain: Interrupt domain to match
1337 * @hwirq: The hardware interrupt number
1338 * @chip: The associated interrupt chip
1339 * @chip_data: The associated interrupt chip data
1340 * @handler: The interrupt flow handler
1341 * @handler_data: The interrupt flow handler data
1342 * @handler_name: The interrupt handler name
1344 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1345 irq_hw_number_t hwirq, struct irq_chip *chip,
1346 void *chip_data, irq_flow_handler_t handler,
1347 void *handler_data, const char *handler_name)
1349 irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data);
1350 __irq_set_handler(virq, handler, 0, handler_name);
1351 irq_set_handler_data(virq, handler_data);
1353 EXPORT_SYMBOL(irq_domain_set_info);
1356 * irq_domain_free_irqs_common - Clear irq_data and free the parent
1357 * @domain: Interrupt domain to match
1358 * @virq: IRQ number to start with
1359 * @nr_irqs: The number of irqs to free
1361 void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq,
1362 unsigned int nr_irqs)
1364 struct irq_data *irq_data;
1367 for (i = 0; i < nr_irqs; i++) {
1368 irq_data = irq_domain_get_irq_data(domain, virq + i);
1370 irq_domain_reset_irq_data(irq_data);
1372 irq_domain_free_irqs_parent(domain, virq, nr_irqs);
1374 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_common);
1377 * irq_domain_free_irqs_top - Clear handler and handler data, clear irqdata and free parent
1378 * @domain: Interrupt domain to match
1379 * @virq: IRQ number to start with
1380 * @nr_irqs: The number of irqs to free
1382 void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq,
1383 unsigned int nr_irqs)
1387 for (i = 0; i < nr_irqs; i++) {
1388 irq_set_handler_data(virq + i, NULL);
1389 irq_set_handler(virq + i, NULL);
1391 irq_domain_free_irqs_common(domain, virq, nr_irqs);
1394 static void irq_domain_free_irqs_hierarchy(struct irq_domain *domain,
1395 unsigned int irq_base,
1396 unsigned int nr_irqs)
1400 if (!domain->ops->free)
1403 for (i = 0; i < nr_irqs; i++) {
1404 if (irq_domain_get_irq_data(domain, irq_base + i))
1405 domain->ops->free(domain, irq_base + i, 1);
1409 int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,
1410 unsigned int irq_base,
1411 unsigned int nr_irqs, void *arg)
1413 if (!domain->ops->alloc) {
1414 pr_debug("domain->ops->alloc() is NULL\n");
1418 return domain->ops->alloc(domain, irq_base, nr_irqs, arg);
1422 * __irq_domain_alloc_irqs - Allocate IRQs from domain
1423 * @domain: domain to allocate from
1424 * @irq_base: allocate specified IRQ number if irq_base >= 0
1425 * @nr_irqs: number of IRQs to allocate
1426 * @node: NUMA node id for memory allocation
1427 * @arg: domain specific argument
1428 * @realloc: IRQ descriptors have already been allocated if true
1429 * @affinity: Optional irq affinity mask for multiqueue devices
1431 * Allocate IRQ numbers and initialized all data structures to support
1432 * hierarchy IRQ domains.
1433 * Parameter @realloc is mainly to support legacy IRQs.
1434 * Returns error code or allocated IRQ number
1436 * The whole process to setup an IRQ has been split into two steps.
1437 * The first step, __irq_domain_alloc_irqs(), is to allocate IRQ
1438 * descriptor and required hardware resources. The second step,
1439 * irq_domain_activate_irq(), is to program the hardware with preallocated
1440 * resources. In this way, it's easier to rollback when failing to
1441 * allocate resources.
1443 int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
1444 unsigned int nr_irqs, int node, void *arg,
1445 bool realloc, const struct irq_affinity_desc *affinity)
1449 if (domain == NULL) {
1450 domain = irq_default_domain;
1451 if (WARN(!domain, "domain is NULL; cannot allocate IRQ\n"))
1455 if (realloc && irq_base >= 0) {
1458 virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node,
1461 pr_debug("cannot allocate IRQ(base %d, count %d)\n",
1467 if (irq_domain_alloc_irq_data(domain, virq, nr_irqs)) {
1468 pr_debug("cannot allocate memory for IRQ%d\n", virq);
1473 mutex_lock(&irq_domain_mutex);
1474 ret = irq_domain_alloc_irqs_hierarchy(domain, virq, nr_irqs, arg);
1476 mutex_unlock(&irq_domain_mutex);
1477 goto out_free_irq_data;
1480 for (i = 0; i < nr_irqs; i++) {
1481 ret = irq_domain_trim_hierarchy(virq + i);
1483 mutex_unlock(&irq_domain_mutex);
1484 goto out_free_irq_data;
1488 for (i = 0; i < nr_irqs; i++)
1489 irq_domain_insert_irq(virq + i);
1490 mutex_unlock(&irq_domain_mutex);
1495 irq_domain_free_irq_data(virq, nr_irqs);
1497 irq_free_descs(virq, nr_irqs);
1501 /* The irq_data was moved, fix the revmap to refer to the new location */
1502 static void irq_domain_fix_revmap(struct irq_data *d)
1506 if (d->hwirq < d->domain->revmap_size)
1507 return; /* Not using radix tree. */
1509 /* Fix up the revmap. */
1510 mutex_lock(&d->domain->revmap_tree_mutex);
1511 slot = radix_tree_lookup_slot(&d->domain->revmap_tree, d->hwirq);
1513 radix_tree_replace_slot(&d->domain->revmap_tree, slot, d);
1514 mutex_unlock(&d->domain->revmap_tree_mutex);
1518 * irq_domain_push_irq() - Push a domain in to the top of a hierarchy.
1519 * @domain: Domain to push.
1520 * @virq: Irq to push the domain in to.
1521 * @arg: Passed to the irq_domain_ops alloc() function.
1523 * For an already existing irqdomain hierarchy, as might be obtained
1524 * via a call to pci_enable_msix(), add an additional domain to the
1525 * head of the processing chain. Must be called before request_irq()
1528 int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg)
1530 struct irq_data *child_irq_data;
1531 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1532 struct irq_desc *desc;
1536 * Check that no action has been set, which indicates the virq
1537 * is in a state where this function doesn't have to deal with
1538 * races between interrupt handling and maintaining the
1539 * hierarchy. This will catch gross misuse. Attempting to
1540 * make the check race free would require holding locks across
1541 * calls to struct irq_domain_ops->alloc(), which could lead
1542 * to deadlock, so we just do a simple check before starting.
1544 desc = irq_to_desc(virq);
1547 if (WARN_ON(desc->action))
1553 if (WARN_ON(!irq_domain_is_hierarchy(domain)))
1559 if (domain->parent != root_irq_data->domain)
1562 child_irq_data = kzalloc_node(sizeof(*child_irq_data), GFP_KERNEL,
1563 irq_data_get_node(root_irq_data));
1564 if (!child_irq_data)
1567 mutex_lock(&irq_domain_mutex);
1569 /* Copy the original irq_data. */
1570 *child_irq_data = *root_irq_data;
1573 * Overwrite the root_irq_data, which is embedded in struct
1574 * irq_desc, with values for this domain.
1576 root_irq_data->parent_data = child_irq_data;
1577 root_irq_data->domain = domain;
1578 root_irq_data->mask = 0;
1579 root_irq_data->hwirq = 0;
1580 root_irq_data->chip = NULL;
1581 root_irq_data->chip_data = NULL;
1583 /* May (probably does) set hwirq, chip, etc. */
1584 rv = irq_domain_alloc_irqs_hierarchy(domain, virq, 1, arg);
1586 /* Restore the original irq_data. */
1587 *root_irq_data = *child_irq_data;
1588 kfree(child_irq_data);
1592 irq_domain_fix_revmap(child_irq_data);
1593 irq_domain_set_mapping(domain, root_irq_data->hwirq, root_irq_data);
1596 mutex_unlock(&irq_domain_mutex);
1600 EXPORT_SYMBOL_GPL(irq_domain_push_irq);
1603 * irq_domain_pop_irq() - Remove a domain from the top of a hierarchy.
1604 * @domain: Domain to remove.
1605 * @virq: Irq to remove the domain from.
1607 * Undo the effects of a call to irq_domain_push_irq(). Must be
1608 * called either before request_irq() or after free_irq().
1610 int irq_domain_pop_irq(struct irq_domain *domain, int virq)
1612 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1613 struct irq_data *child_irq_data;
1614 struct irq_data *tmp_irq_data;
1615 struct irq_desc *desc;
1618 * Check that no action is set, which indicates the virq is in
1619 * a state where this function doesn't have to deal with races
1620 * between interrupt handling and maintaining the hierarchy.
1621 * This will catch gross misuse. Attempting to make the check
1622 * race free would require holding locks across calls to
1623 * struct irq_domain_ops->free(), which could lead to
1624 * deadlock, so we just do a simple check before starting.
1626 desc = irq_to_desc(virq);
1629 if (WARN_ON(desc->action))
1638 tmp_irq_data = irq_domain_get_irq_data(domain, virq);
1640 /* We can only "pop" if this domain is at the top of the list */
1641 if (WARN_ON(root_irq_data != tmp_irq_data))
1644 if (WARN_ON(root_irq_data->domain != domain))
1647 child_irq_data = root_irq_data->parent_data;
1648 if (WARN_ON(!child_irq_data))
1651 mutex_lock(&irq_domain_mutex);
1653 root_irq_data->parent_data = NULL;
1655 irq_domain_clear_mapping(domain, root_irq_data->hwirq);
1656 irq_domain_free_irqs_hierarchy(domain, virq, 1);
1658 /* Restore the original irq_data. */
1659 *root_irq_data = *child_irq_data;
1661 irq_domain_fix_revmap(root_irq_data);
1663 mutex_unlock(&irq_domain_mutex);
1665 kfree(child_irq_data);
1669 EXPORT_SYMBOL_GPL(irq_domain_pop_irq);
1672 * irq_domain_free_irqs - Free IRQ number and associated data structures
1673 * @virq: base IRQ number
1674 * @nr_irqs: number of IRQs to free
1676 void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs)
1678 struct irq_data *data = irq_get_irq_data(virq);
1681 if (WARN(!data || !data->domain || !data->domain->ops->free,
1682 "NULL pointer, cannot free irq\n"))
1685 mutex_lock(&irq_domain_mutex);
1686 for (i = 0; i < nr_irqs; i++)
1687 irq_domain_remove_irq(virq + i);
1688 irq_domain_free_irqs_hierarchy(data->domain, virq, nr_irqs);
1689 mutex_unlock(&irq_domain_mutex);
1691 irq_domain_free_irq_data(virq, nr_irqs);
1692 irq_free_descs(virq, nr_irqs);
1696 * irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain
1697 * @irq_base: Base IRQ number
1698 * @nr_irqs: Number of IRQs to allocate
1699 * @arg: Allocation data (arch/domain specific)
1701 * Check whether the domain has been setup recursive. If not allocate
1702 * through the parent domain.
1704 int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
1705 unsigned int irq_base, unsigned int nr_irqs,
1708 if (!domain->parent)
1711 return irq_domain_alloc_irqs_hierarchy(domain->parent, irq_base,
1714 EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent);
1717 * irq_domain_free_irqs_parent - Free interrupts from parent domain
1718 * @irq_base: Base IRQ number
1719 * @nr_irqs: Number of IRQs to free
1721 * Check whether the domain has been setup recursive. If not free
1722 * through the parent domain.
1724 void irq_domain_free_irqs_parent(struct irq_domain *domain,
1725 unsigned int irq_base, unsigned int nr_irqs)
1727 if (!domain->parent)
1730 irq_domain_free_irqs_hierarchy(domain->parent, irq_base, nr_irqs);
1732 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent);
1734 static void __irq_domain_deactivate_irq(struct irq_data *irq_data)
1736 if (irq_data && irq_data->domain) {
1737 struct irq_domain *domain = irq_data->domain;
1739 if (domain->ops->deactivate)
1740 domain->ops->deactivate(domain, irq_data);
1741 if (irq_data->parent_data)
1742 __irq_domain_deactivate_irq(irq_data->parent_data);
1746 static int __irq_domain_activate_irq(struct irq_data *irqd, bool reserve)
1750 if (irqd && irqd->domain) {
1751 struct irq_domain *domain = irqd->domain;
1753 if (irqd->parent_data)
1754 ret = __irq_domain_activate_irq(irqd->parent_data,
1756 if (!ret && domain->ops->activate) {
1757 ret = domain->ops->activate(domain, irqd, reserve);
1758 /* Rollback in case of error */
1759 if (ret && irqd->parent_data)
1760 __irq_domain_deactivate_irq(irqd->parent_data);
1767 * irq_domain_activate_irq - Call domain_ops->activate recursively to activate
1769 * @irq_data: Outermost irq_data associated with interrupt
1770 * @reserve: If set only reserve an interrupt vector instead of assigning one
1772 * This is the second step to call domain_ops->activate to program interrupt
1773 * controllers, so the interrupt could actually get delivered.
1775 int irq_domain_activate_irq(struct irq_data *irq_data, bool reserve)
1779 if (!irqd_is_activated(irq_data))
1780 ret = __irq_domain_activate_irq(irq_data, reserve);
1782 irqd_set_activated(irq_data);
1787 * irq_domain_deactivate_irq - Call domain_ops->deactivate recursively to
1788 * deactivate interrupt
1789 * @irq_data: outermost irq_data associated with interrupt
1791 * It calls domain_ops->deactivate to program interrupt controllers to disable
1792 * interrupt delivery.
1794 void irq_domain_deactivate_irq(struct irq_data *irq_data)
1796 if (irqd_is_activated(irq_data)) {
1797 __irq_domain_deactivate_irq(irq_data);
1798 irqd_clr_activated(irq_data);
1802 static void irq_domain_check_hierarchy(struct irq_domain *domain)
1804 /* Hierarchy irq_domains must implement callback alloc() */
1805 if (domain->ops->alloc)
1806 domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY;
1810 * irq_domain_hierarchical_is_msi_remap - Check if the domain or any
1811 * parent has MSI remapping support
1812 * @domain: domain pointer
1814 bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain)
1816 for (; domain; domain = domain->parent) {
1817 if (irq_domain_is_msi_remap(domain))
1822 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1824 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1825 * @domain: domain to match
1826 * @virq: IRQ number to get irq_data
1828 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1831 struct irq_data *irq_data = irq_get_irq_data(virq);
1833 return (irq_data && irq_data->domain == domain) ? irq_data : NULL;
1835 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1838 * irq_domain_set_info - Set the complete data for a @virq in @domain
1839 * @domain: Interrupt domain to match
1841 * @hwirq: The hardware interrupt number
1842 * @chip: The associated interrupt chip
1843 * @chip_data: The associated interrupt chip data
1844 * @handler: The interrupt flow handler
1845 * @handler_data: The interrupt flow handler data
1846 * @handler_name: The interrupt handler name
1848 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1849 irq_hw_number_t hwirq, struct irq_chip *chip,
1850 void *chip_data, irq_flow_handler_t handler,
1851 void *handler_data, const char *handler_name)
1853 irq_set_chip_and_handler_name(virq, chip, handler, handler_name);
1854 irq_set_chip_data(virq, chip_data);
1855 irq_set_handler_data(virq, handler_data);
1858 static void irq_domain_check_hierarchy(struct irq_domain *domain)
1861 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1863 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
1864 static struct dentry *domain_dir;
1867 irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind)
1869 seq_printf(m, "%*sname: %s\n", ind, "", d->name);
1870 seq_printf(m, "%*ssize: %u\n", ind + 1, "",
1871 d->revmap_size + d->revmap_direct_max_irq);
1872 seq_printf(m, "%*smapped: %u\n", ind + 1, "", d->mapcount);
1873 seq_printf(m, "%*sflags: 0x%08x\n", ind +1 , "", d->flags);
1874 if (d->ops && d->ops->debug_show)
1875 d->ops->debug_show(m, d, NULL, ind + 1);
1876 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1879 seq_printf(m, "%*sparent: %s\n", ind + 1, "", d->parent->name);
1880 irq_domain_debug_show_one(m, d->parent, ind + 4);
1884 static int irq_domain_debug_show(struct seq_file *m, void *p)
1886 struct irq_domain *d = m->private;
1888 /* Default domain? Might be NULL */
1890 if (!irq_default_domain)
1892 d = irq_default_domain;
1894 irq_domain_debug_show_one(m, d, 0);
1897 DEFINE_SHOW_ATTRIBUTE(irq_domain_debug);
1899 static void debugfs_add_domain_dir(struct irq_domain *d)
1901 if (!d->name || !domain_dir || d->debugfs_file)
1903 d->debugfs_file = debugfs_create_file(d->name, 0444, domain_dir, d,
1904 &irq_domain_debug_fops);
1907 static void debugfs_remove_domain_dir(struct irq_domain *d)
1909 debugfs_remove(d->debugfs_file);
1910 d->debugfs_file = NULL;
1913 void __init irq_domain_debugfs_init(struct dentry *root)
1915 struct irq_domain *d;
1917 domain_dir = debugfs_create_dir("domains", root);
1919 debugfs_create_file("default", 0444, domain_dir, NULL,
1920 &irq_domain_debug_fops);
1921 mutex_lock(&irq_domain_mutex);
1922 list_for_each_entry(d, &irq_domain_list, link)
1923 debugfs_add_domain_dir(d);
1924 mutex_unlock(&irq_domain_mutex);