1 // SPDX-License-Identifier: GPL-2.0
3 #define pr_fmt(fmt) "irq: " fmt
5 #include <linux/acpi.h>
6 #include <linux/debugfs.h>
7 #include <linux/hardirq.h>
8 #include <linux/interrupt.h>
10 #include <linux/irqdesc.h>
11 #include <linux/irqdomain.h>
12 #include <linux/module.h>
13 #include <linux/mutex.h>
15 #include <linux/of_address.h>
16 #include <linux/of_irq.h>
17 #include <linux/topology.h>
18 #include <linux/seq_file.h>
19 #include <linux/slab.h>
20 #include <linux/smp.h>
23 static LIST_HEAD(irq_domain_list);
24 static DEFINE_MUTEX(irq_domain_mutex);
26 static struct irq_domain *irq_default_domain;
28 static void irq_domain_check_hierarchy(struct irq_domain *domain);
31 struct fwnode_handle fwnode;
37 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
38 static void debugfs_add_domain_dir(struct irq_domain *d);
39 static void debugfs_remove_domain_dir(struct irq_domain *d);
41 static inline void debugfs_add_domain_dir(struct irq_domain *d) { }
42 static inline void debugfs_remove_domain_dir(struct irq_domain *d) { }
45 const struct fwnode_operations irqchip_fwnode_ops;
46 EXPORT_SYMBOL_GPL(irqchip_fwnode_ops);
49 * __irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for
50 * identifying an irq domain
51 * @type: Type of irqchip_fwnode. See linux/irqdomain.h
52 * @id: Optional user provided id if name != NULL
53 * @name: Optional user provided domain name
54 * @pa: Optional user-provided physical address
56 * Allocate a struct irqchip_fwid, and return a poiner to the embedded
57 * fwnode_handle (or NULL on failure).
59 * Note: The types IRQCHIP_FWNODE_NAMED and IRQCHIP_FWNODE_NAMED_ID are
60 * solely to transport name information to irqdomain creation code. The
61 * node is not stored. For other types the pointer is kept in the irq
64 struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
68 struct irqchip_fwid *fwid;
71 fwid = kzalloc(sizeof(*fwid), GFP_KERNEL);
74 case IRQCHIP_FWNODE_NAMED:
75 n = kasprintf(GFP_KERNEL, "%s", name);
77 case IRQCHIP_FWNODE_NAMED_ID:
78 n = kasprintf(GFP_KERNEL, "%s-%d", name, id);
81 n = kasprintf(GFP_KERNEL, "irqchip@%pa", pa);
94 fwid->fwnode.ops = &irqchip_fwnode_ops;
97 EXPORT_SYMBOL_GPL(__irq_domain_alloc_fwnode);
100 * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle
102 * Free a fwnode_handle allocated with irq_domain_alloc_fwnode.
104 void irq_domain_free_fwnode(struct fwnode_handle *fwnode)
106 struct irqchip_fwid *fwid;
108 if (WARN_ON(!is_fwnode_irqchip(fwnode)))
111 fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
115 EXPORT_SYMBOL_GPL(irq_domain_free_fwnode);
118 * __irq_domain_add() - Allocate a new irq_domain data structure
119 * @fwnode: firmware node for the interrupt controller
120 * @size: Size of linear map; 0 for radix mapping only
121 * @hwirq_max: Maximum number of interrupts supported by controller
122 * @direct_max: Maximum value of direct maps; Use ~0 for no limit; 0 for no
124 * @ops: domain callbacks
125 * @host_data: Controller private data pointer
127 * Allocates and initializes an irq_domain structure.
128 * Returns pointer to IRQ domain, or NULL on failure.
130 struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
131 irq_hw_number_t hwirq_max, int direct_max,
132 const struct irq_domain_ops *ops,
135 struct irqchip_fwid *fwid;
136 struct irq_domain *domain;
138 static atomic_t unknown_domains;
140 domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size),
141 GFP_KERNEL, of_node_to_nid(to_of_node(fwnode)));
145 if (is_fwnode_irqchip(fwnode)) {
146 fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
148 switch (fwid->type) {
149 case IRQCHIP_FWNODE_NAMED:
150 case IRQCHIP_FWNODE_NAMED_ID:
151 domain->fwnode = fwnode;
152 domain->name = kstrdup(fwid->name, GFP_KERNEL);
157 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
160 domain->fwnode = fwnode;
161 domain->name = fwid->name;
164 } else if (is_of_node(fwnode) || is_acpi_device_node(fwnode) ||
165 is_software_node(fwnode)) {
169 * fwnode paths contain '/', which debugfs is legitimately
170 * unhappy about. Replace them with ':', which does
171 * the trick and is not as offensive as '\'...
173 name = kasprintf(GFP_KERNEL, "%pfw", fwnode);
179 strreplace(name, '/', ':');
182 domain->fwnode = fwnode;
183 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
188 pr_err("Invalid fwnode type for irqdomain\n");
189 domain->name = kasprintf(GFP_KERNEL, "unknown-%d",
190 atomic_inc_return(&unknown_domains));
195 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
198 fwnode_handle_get(fwnode);
201 INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
202 mutex_init(&domain->revmap_tree_mutex);
204 domain->host_data = host_data;
205 domain->hwirq_max = hwirq_max;
206 domain->revmap_size = size;
207 domain->revmap_direct_max_irq = direct_max;
208 irq_domain_check_hierarchy(domain);
210 mutex_lock(&irq_domain_mutex);
211 debugfs_add_domain_dir(domain);
212 list_add(&domain->link, &irq_domain_list);
213 mutex_unlock(&irq_domain_mutex);
215 pr_debug("Added domain %s\n", domain->name);
218 EXPORT_SYMBOL_GPL(__irq_domain_add);
221 * irq_domain_remove() - Remove an irq domain.
222 * @domain: domain to remove
224 * This routine is used to remove an irq domain. The caller must ensure
225 * that all mappings within the domain have been disposed of prior to
226 * use, depending on the revmap type.
228 void irq_domain_remove(struct irq_domain *domain)
230 mutex_lock(&irq_domain_mutex);
231 debugfs_remove_domain_dir(domain);
233 WARN_ON(!radix_tree_empty(&domain->revmap_tree));
235 list_del(&domain->link);
238 * If the going away domain is the default one, reset it.
240 if (unlikely(irq_default_domain == domain))
241 irq_set_default_host(NULL);
243 mutex_unlock(&irq_domain_mutex);
245 pr_debug("Removed domain %s\n", domain->name);
247 fwnode_handle_put(domain->fwnode);
248 if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
252 EXPORT_SYMBOL_GPL(irq_domain_remove);
254 void irq_domain_update_bus_token(struct irq_domain *domain,
255 enum irq_domain_bus_token bus_token)
259 if (domain->bus_token == bus_token)
262 mutex_lock(&irq_domain_mutex);
264 domain->bus_token = bus_token;
266 name = kasprintf(GFP_KERNEL, "%s-%d", domain->name, bus_token);
268 mutex_unlock(&irq_domain_mutex);
272 debugfs_remove_domain_dir(domain);
274 if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
277 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
280 debugfs_add_domain_dir(domain);
282 mutex_unlock(&irq_domain_mutex);
284 EXPORT_SYMBOL_GPL(irq_domain_update_bus_token);
287 * irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs
288 * @of_node: pointer to interrupt controller's device tree node.
289 * @size: total number of irqs in mapping
290 * @first_irq: first number of irq block assigned to the domain,
291 * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then
292 * pre-map all of the irqs in the domain to virqs starting at first_irq.
293 * @ops: domain callbacks
294 * @host_data: Controller private data pointer
296 * Allocates an irq_domain, and optionally if first_irq is positive then also
297 * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq.
299 * This is intended to implement the expected behaviour for most
300 * interrupt controllers. If device tree is used, then first_irq will be 0 and
301 * irqs get mapped dynamically on the fly. However, if the controller requires
302 * static virq assignments (non-DT boot) then it will set that up correctly.
304 struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
306 unsigned int first_irq,
307 const struct irq_domain_ops *ops,
310 struct irq_domain *domain;
312 domain = __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data);
317 if (IS_ENABLED(CONFIG_SPARSE_IRQ)) {
318 /* attempt to allocated irq_descs */
319 int rc = irq_alloc_descs(first_irq, first_irq, size,
320 of_node_to_nid(of_node));
322 pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
325 irq_domain_associate_many(domain, first_irq, 0, size);
330 EXPORT_SYMBOL_GPL(irq_domain_add_simple);
333 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain.
334 * @of_node: pointer to interrupt controller's device tree node.
335 * @size: total number of irqs in legacy mapping
336 * @first_irq: first number of irq block assigned to the domain
337 * @first_hwirq: first hwirq number to use for the translation. Should normally
338 * be '0', but a positive integer can be used if the effective
339 * hwirqs numbering does not begin at zero.
340 * @ops: map/unmap domain callbacks
341 * @host_data: Controller private data pointer
343 * Note: the map() callback will be called before this function returns
344 * for all legacy interrupts except 0 (which is always the invalid irq for
345 * a legacy controller).
347 struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
349 unsigned int first_irq,
350 irq_hw_number_t first_hwirq,
351 const struct irq_domain_ops *ops,
354 struct irq_domain *domain;
356 domain = __irq_domain_add(of_node_to_fwnode(of_node), first_hwirq + size,
357 first_hwirq + size, 0, ops, host_data);
359 irq_domain_associate_many(domain, first_irq, first_hwirq, size);
363 EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
366 * irq_find_matching_fwspec() - Locates a domain for a given fwspec
367 * @fwspec: FW specifier for an interrupt
368 * @bus_token: domain-specific data
370 struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
371 enum irq_domain_bus_token bus_token)
373 struct irq_domain *h, *found = NULL;
374 struct fwnode_handle *fwnode = fwspec->fwnode;
377 /* We might want to match the legacy controller last since
378 * it might potentially be set to match all interrupts in
379 * the absence of a device node. This isn't a problem so far
382 * bus_token == DOMAIN_BUS_ANY matches any domain, any other
383 * values must generate an exact match for the domain to be
386 mutex_lock(&irq_domain_mutex);
387 list_for_each_entry(h, &irq_domain_list, link) {
388 if (h->ops->select && fwspec->param_count)
389 rc = h->ops->select(h, fwspec, bus_token);
390 else if (h->ops->match)
391 rc = h->ops->match(h, to_of_node(fwnode), bus_token);
393 rc = ((fwnode != NULL) && (h->fwnode == fwnode) &&
394 ((bus_token == DOMAIN_BUS_ANY) ||
395 (h->bus_token == bus_token)));
402 mutex_unlock(&irq_domain_mutex);
405 EXPORT_SYMBOL_GPL(irq_find_matching_fwspec);
408 * irq_domain_check_msi_remap - Check whether all MSI irq domains implement
411 * Return: false if any MSI irq domain does not support IRQ remapping,
412 * true otherwise (including if there is no MSI irq domain)
414 bool irq_domain_check_msi_remap(void)
416 struct irq_domain *h;
419 mutex_lock(&irq_domain_mutex);
420 list_for_each_entry(h, &irq_domain_list, link) {
421 if (irq_domain_is_msi(h) &&
422 !irq_domain_hierarchical_is_msi_remap(h)) {
427 mutex_unlock(&irq_domain_mutex);
430 EXPORT_SYMBOL_GPL(irq_domain_check_msi_remap);
433 * irq_set_default_host() - Set a "default" irq domain
434 * @domain: default domain pointer
436 * For convenience, it's possible to set a "default" domain that will be used
437 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
438 * platforms that want to manipulate a few hard coded interrupt numbers that
439 * aren't properly represented in the device-tree.
441 void irq_set_default_host(struct irq_domain *domain)
443 pr_debug("Default domain set to @0x%p\n", domain);
445 irq_default_domain = domain;
447 EXPORT_SYMBOL_GPL(irq_set_default_host);
450 * irq_get_default_host() - Retrieve the "default" irq domain
452 * Returns: the default domain, if any.
454 * Modern code should never use this. This should only be used on
455 * systems that cannot implement a firmware->fwnode mapping (which
456 * both DT and ACPI provide).
458 struct irq_domain *irq_get_default_host(void)
460 return irq_default_domain;
463 static void irq_domain_clear_mapping(struct irq_domain *domain,
464 irq_hw_number_t hwirq)
466 if (hwirq < domain->revmap_size) {
467 domain->linear_revmap[hwirq] = 0;
469 mutex_lock(&domain->revmap_tree_mutex);
470 radix_tree_delete(&domain->revmap_tree, hwirq);
471 mutex_unlock(&domain->revmap_tree_mutex);
475 static void irq_domain_set_mapping(struct irq_domain *domain,
476 irq_hw_number_t hwirq,
477 struct irq_data *irq_data)
479 if (hwirq < domain->revmap_size) {
480 domain->linear_revmap[hwirq] = irq_data->irq;
482 mutex_lock(&domain->revmap_tree_mutex);
483 radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
484 mutex_unlock(&domain->revmap_tree_mutex);
488 void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
490 struct irq_data *irq_data = irq_get_irq_data(irq);
491 irq_hw_number_t hwirq;
493 if (WARN(!irq_data || irq_data->domain != domain,
494 "virq%i doesn't exist; cannot disassociate\n", irq))
497 hwirq = irq_data->hwirq;
498 irq_set_status_flags(irq, IRQ_NOREQUEST);
500 /* remove chip and handler */
501 irq_set_chip_and_handler(irq, NULL, NULL);
503 /* Make sure it's completed */
504 synchronize_irq(irq);
506 /* Tell the PIC about it */
507 if (domain->ops->unmap)
508 domain->ops->unmap(domain, irq);
511 irq_data->domain = NULL;
515 /* Clear reverse map for this hwirq */
516 irq_domain_clear_mapping(domain, hwirq);
519 int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
520 irq_hw_number_t hwirq)
522 struct irq_data *irq_data = irq_get_irq_data(virq);
525 if (WARN(hwirq >= domain->hwirq_max,
526 "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name))
528 if (WARN(!irq_data, "error: virq%i is not allocated", virq))
530 if (WARN(irq_data->domain, "error: virq%i is already associated", virq))
533 mutex_lock(&irq_domain_mutex);
534 irq_data->hwirq = hwirq;
535 irq_data->domain = domain;
536 if (domain->ops->map) {
537 ret = domain->ops->map(domain, virq, hwirq);
540 * If map() returns -EPERM, this interrupt is protected
541 * by the firmware or some other service and shall not
542 * be mapped. Don't bother telling the user about it.
545 pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n",
546 domain->name, hwirq, virq, ret);
548 irq_data->domain = NULL;
550 mutex_unlock(&irq_domain_mutex);
554 /* If not already assigned, give the domain the chip's name */
555 if (!domain->name && irq_data->chip)
556 domain->name = irq_data->chip->name;
560 irq_domain_set_mapping(domain, hwirq, irq_data);
561 mutex_unlock(&irq_domain_mutex);
563 irq_clear_status_flags(virq, IRQ_NOREQUEST);
567 EXPORT_SYMBOL_GPL(irq_domain_associate);
569 void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
570 irq_hw_number_t hwirq_base, int count)
572 struct device_node *of_node;
575 of_node = irq_domain_get_of_node(domain);
576 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
577 of_node_full_name(of_node), irq_base, (int)hwirq_base, count);
579 for (i = 0; i < count; i++) {
580 irq_domain_associate(domain, irq_base + i, hwirq_base + i);
583 EXPORT_SYMBOL_GPL(irq_domain_associate_many);
586 * irq_create_direct_mapping() - Allocate an irq for direct mapping
587 * @domain: domain to allocate the irq for or NULL for default domain
589 * This routine is used for irq controllers which can choose the hardware
590 * interrupt numbers they generate. In such a case it's simplest to use
591 * the linux irq as the hardware interrupt number. It still uses the linear
592 * or radix tree to store the mapping, but the irq controller can optimize
593 * the revmap path by using the hwirq directly.
595 unsigned int irq_create_direct_mapping(struct irq_domain *domain)
597 struct device_node *of_node;
601 domain = irq_default_domain;
603 of_node = irq_domain_get_of_node(domain);
604 virq = irq_alloc_desc_from(1, of_node_to_nid(of_node));
606 pr_debug("create_direct virq allocation failed\n");
609 if (virq >= domain->revmap_direct_max_irq) {
610 pr_err("ERROR: no free irqs available below %i maximum\n",
611 domain->revmap_direct_max_irq);
615 pr_debug("create_direct obtained virq %d\n", virq);
617 if (irq_domain_associate(domain, virq, virq)) {
624 EXPORT_SYMBOL_GPL(irq_create_direct_mapping);
627 * irq_create_mapping() - Map a hardware interrupt into linux irq space
628 * @domain: domain owning this hardware interrupt or NULL for default domain
629 * @hwirq: hardware irq number in that domain space
631 * Only one mapping per hardware interrupt is permitted. Returns a linux
633 * If the sense/trigger is to be specified, set_irq_type() should be called
634 * on the number returned from that call.
636 unsigned int irq_create_mapping(struct irq_domain *domain,
637 irq_hw_number_t hwirq)
639 struct device_node *of_node;
642 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
644 /* Look for default domain if nececssary */
646 domain = irq_default_domain;
647 if (domain == NULL) {
648 WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq);
651 pr_debug("-> using domain @%p\n", domain);
653 of_node = irq_domain_get_of_node(domain);
655 /* Check if mapping already exists */
656 virq = irq_find_mapping(domain, hwirq);
658 pr_debug("-> existing mapping on virq %d\n", virq);
662 /* Allocate a virtual interrupt number */
663 virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node), NULL);
665 pr_debug("-> virq allocation failed\n");
669 if (irq_domain_associate(domain, virq, hwirq)) {
674 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
675 hwirq, of_node_full_name(of_node), virq);
679 EXPORT_SYMBOL_GPL(irq_create_mapping);
682 * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs
683 * @domain: domain owning the interrupt range
684 * @irq_base: beginning of linux IRQ range
685 * @hwirq_base: beginning of hardware IRQ range
686 * @count: Number of interrupts to map
688 * This routine is used for allocating and mapping a range of hardware
689 * irqs to linux irqs where the linux irq numbers are at pre-defined
690 * locations. For use by controllers that already have static mappings
691 * to insert in to the domain.
693 * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time
696 * 0 is returned upon success, while any failure to establish a static
697 * mapping is treated as an error.
699 int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base,
700 irq_hw_number_t hwirq_base, int count)
702 struct device_node *of_node;
705 of_node = irq_domain_get_of_node(domain);
706 ret = irq_alloc_descs(irq_base, irq_base, count,
707 of_node_to_nid(of_node));
708 if (unlikely(ret < 0))
711 irq_domain_associate_many(domain, irq_base, hwirq_base, count);
714 EXPORT_SYMBOL_GPL(irq_create_strict_mappings);
716 static int irq_domain_translate(struct irq_domain *d,
717 struct irq_fwspec *fwspec,
718 irq_hw_number_t *hwirq, unsigned int *type)
720 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
721 if (d->ops->translate)
722 return d->ops->translate(d, fwspec, hwirq, type);
725 return d->ops->xlate(d, to_of_node(fwspec->fwnode),
726 fwspec->param, fwspec->param_count,
729 /* If domain has no translation, then we assume interrupt line */
730 *hwirq = fwspec->param[0];
734 static void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,
736 struct irq_fwspec *fwspec)
740 fwspec->fwnode = np ? &np->fwnode : NULL;
741 fwspec->param_count = count;
743 for (i = 0; i < count; i++)
744 fwspec->param[i] = args[i];
747 unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
749 struct irq_domain *domain;
750 struct irq_data *irq_data;
751 irq_hw_number_t hwirq;
752 unsigned int type = IRQ_TYPE_NONE;
755 if (fwspec->fwnode) {
756 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_WIRED);
758 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_ANY);
760 domain = irq_default_domain;
764 pr_warn("no irq domain found for %s !\n",
765 of_node_full_name(to_of_node(fwspec->fwnode)));
769 if (irq_domain_translate(domain, fwspec, &hwirq, &type))
773 * WARN if the irqchip returns a type with bits
774 * outside the sense mask set and clear these bits.
776 if (WARN_ON(type & ~IRQ_TYPE_SENSE_MASK))
777 type &= IRQ_TYPE_SENSE_MASK;
780 * If we've already configured this interrupt,
781 * don't do it again, or hell will break loose.
783 virq = irq_find_mapping(domain, hwirq);
786 * If the trigger type is not specified or matches the
787 * current trigger type then we are done so return the
790 if (type == IRQ_TYPE_NONE || type == irq_get_trigger_type(virq))
794 * If the trigger type has not been set yet, then set
795 * it now and return the interrupt number.
797 if (irq_get_trigger_type(virq) == IRQ_TYPE_NONE) {
798 irq_data = irq_get_irq_data(virq);
802 irqd_set_trigger_type(irq_data, type);
806 pr_warn("type mismatch, failed to map hwirq-%lu for %s!\n",
807 hwirq, of_node_full_name(to_of_node(fwspec->fwnode)));
811 if (irq_domain_is_hierarchy(domain)) {
812 virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, fwspec);
817 virq = irq_create_mapping(domain, hwirq);
822 irq_data = irq_get_irq_data(virq);
824 if (irq_domain_is_hierarchy(domain))
825 irq_domain_free_irqs(virq, 1);
827 irq_dispose_mapping(virq);
831 /* Store trigger type */
832 irqd_set_trigger_type(irq_data, type);
836 EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping);
838 unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data)
840 struct irq_fwspec fwspec;
842 of_phandle_args_to_fwspec(irq_data->np, irq_data->args,
843 irq_data->args_count, &fwspec);
845 return irq_create_fwspec_mapping(&fwspec);
847 EXPORT_SYMBOL_GPL(irq_create_of_mapping);
850 * irq_dispose_mapping() - Unmap an interrupt
851 * @virq: linux irq number of the interrupt to unmap
853 void irq_dispose_mapping(unsigned int virq)
855 struct irq_data *irq_data = irq_get_irq_data(virq);
856 struct irq_domain *domain;
858 if (!virq || !irq_data)
861 domain = irq_data->domain;
862 if (WARN_ON(domain == NULL))
865 if (irq_domain_is_hierarchy(domain)) {
866 irq_domain_free_irqs(virq, 1);
868 irq_domain_disassociate(domain, virq);
872 EXPORT_SYMBOL_GPL(irq_dispose_mapping);
875 * irq_find_mapping() - Find a linux irq from a hw irq number.
876 * @domain: domain owning this hardware interrupt
877 * @hwirq: hardware irq number in that domain space
879 unsigned int irq_find_mapping(struct irq_domain *domain,
880 irq_hw_number_t hwirq)
882 struct irq_data *data;
884 /* Look for default domain if nececssary */
886 domain = irq_default_domain;
890 if (hwirq < domain->revmap_direct_max_irq) {
891 data = irq_domain_get_irq_data(domain, hwirq);
892 if (data && data->hwirq == hwirq)
896 /* Check if the hwirq is in the linear revmap. */
897 if (hwirq < domain->revmap_size)
898 return domain->linear_revmap[hwirq];
901 data = radix_tree_lookup(&domain->revmap_tree, hwirq);
903 return data ? data->irq : 0;
905 EXPORT_SYMBOL_GPL(irq_find_mapping);
908 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
910 * Device Tree IRQ specifier translation function which works with one cell
911 * bindings where the cell value maps directly to the hwirq number.
913 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
914 const u32 *intspec, unsigned int intsize,
915 unsigned long *out_hwirq, unsigned int *out_type)
917 if (WARN_ON(intsize < 1))
919 *out_hwirq = intspec[0];
920 *out_type = IRQ_TYPE_NONE;
923 EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell);
926 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings
928 * Device Tree IRQ specifier translation function which works with two cell
929 * bindings where the cell values map directly to the hwirq number
930 * and linux irq flags.
932 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
933 const u32 *intspec, unsigned int intsize,
934 irq_hw_number_t *out_hwirq, unsigned int *out_type)
936 struct irq_fwspec fwspec;
938 of_phandle_args_to_fwspec(ctrlr, intspec, intsize, &fwspec);
939 return irq_domain_translate_twocell(d, &fwspec, out_hwirq, out_type);
941 EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell);
944 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings
946 * Device Tree IRQ specifier translation function which works with either one
947 * or two cell bindings where the cell values map directly to the hwirq number
948 * and linux irq flags.
950 * Note: don't use this function unless your interrupt controller explicitly
951 * supports both one and two cell bindings. For the majority of controllers
952 * the _onecell() or _twocell() variants above should be used.
954 int irq_domain_xlate_onetwocell(struct irq_domain *d,
955 struct device_node *ctrlr,
956 const u32 *intspec, unsigned int intsize,
957 unsigned long *out_hwirq, unsigned int *out_type)
959 if (WARN_ON(intsize < 1))
961 *out_hwirq = intspec[0];
963 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
965 *out_type = IRQ_TYPE_NONE;
968 EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell);
970 const struct irq_domain_ops irq_domain_simple_ops = {
971 .xlate = irq_domain_xlate_onetwocell,
973 EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
976 * irq_domain_translate_onecell() - Generic translate for direct one cell
979 int irq_domain_translate_onecell(struct irq_domain *d,
980 struct irq_fwspec *fwspec,
981 unsigned long *out_hwirq,
982 unsigned int *out_type)
984 if (WARN_ON(fwspec->param_count < 1))
986 *out_hwirq = fwspec->param[0];
987 *out_type = IRQ_TYPE_NONE;
990 EXPORT_SYMBOL_GPL(irq_domain_translate_onecell);
993 * irq_domain_translate_twocell() - Generic translate for direct two cell
996 * Device Tree IRQ specifier translation function which works with two cell
997 * bindings where the cell values map directly to the hwirq number
998 * and linux irq flags.
1000 int irq_domain_translate_twocell(struct irq_domain *d,
1001 struct irq_fwspec *fwspec,
1002 unsigned long *out_hwirq,
1003 unsigned int *out_type)
1005 if (WARN_ON(fwspec->param_count < 2))
1007 *out_hwirq = fwspec->param[0];
1008 *out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;
1011 EXPORT_SYMBOL_GPL(irq_domain_translate_twocell);
1013 int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq,
1014 int node, const struct irq_affinity_desc *affinity)
1019 virq = __irq_alloc_descs(virq, virq, cnt, node, THIS_MODULE,
1022 hint = hwirq % nr_irqs;
1025 virq = __irq_alloc_descs(-1, hint, cnt, node, THIS_MODULE,
1027 if (virq <= 0 && hint > 1) {
1028 virq = __irq_alloc_descs(-1, 1, cnt, node, THIS_MODULE,
1037 * irq_domain_reset_irq_data - Clear hwirq, chip and chip_data in @irq_data
1038 * @irq_data: The pointer to irq_data
1040 void irq_domain_reset_irq_data(struct irq_data *irq_data)
1042 irq_data->hwirq = 0;
1043 irq_data->chip = &no_irq_chip;
1044 irq_data->chip_data = NULL;
1046 EXPORT_SYMBOL_GPL(irq_domain_reset_irq_data);
1048 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1050 * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy
1051 * @parent: Parent irq domain to associate with the new domain
1052 * @flags: Irq domain flags associated to the domain
1053 * @size: Size of the domain. See below
1054 * @fwnode: Optional fwnode of the interrupt controller
1055 * @ops: Pointer to the interrupt domain callbacks
1056 * @host_data: Controller private data pointer
1058 * If @size is 0 a tree domain is created, otherwise a linear domain.
1060 * If successful the parent is associated to the new domain and the
1061 * domain flags are set.
1062 * Returns pointer to IRQ domain, or NULL on failure.
1064 struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
1067 struct fwnode_handle *fwnode,
1068 const struct irq_domain_ops *ops,
1071 struct irq_domain *domain;
1074 domain = irq_domain_create_linear(fwnode, size, ops, host_data);
1076 domain = irq_domain_create_tree(fwnode, ops, host_data);
1078 domain->parent = parent;
1079 domain->flags |= flags;
1084 EXPORT_SYMBOL_GPL(irq_domain_create_hierarchy);
1086 static void irq_domain_insert_irq(int virq)
1088 struct irq_data *data;
1090 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1091 struct irq_domain *domain = data->domain;
1094 irq_domain_set_mapping(domain, data->hwirq, data);
1096 /* If not already assigned, give the domain the chip's name */
1097 if (!domain->name && data->chip)
1098 domain->name = data->chip->name;
1101 irq_clear_status_flags(virq, IRQ_NOREQUEST);
1104 static void irq_domain_remove_irq(int virq)
1106 struct irq_data *data;
1108 irq_set_status_flags(virq, IRQ_NOREQUEST);
1109 irq_set_chip_and_handler(virq, NULL, NULL);
1110 synchronize_irq(virq);
1113 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1114 struct irq_domain *domain = data->domain;
1115 irq_hw_number_t hwirq = data->hwirq;
1118 irq_domain_clear_mapping(domain, hwirq);
1122 static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain,
1123 struct irq_data *child)
1125 struct irq_data *irq_data;
1127 irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL,
1128 irq_data_get_node(child));
1130 child->parent_data = irq_data;
1131 irq_data->irq = child->irq;
1132 irq_data->common = child->common;
1133 irq_data->domain = domain;
1139 static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs)
1141 struct irq_data *irq_data, *tmp;
1144 for (i = 0; i < nr_irqs; i++) {
1145 irq_data = irq_get_irq_data(virq + i);
1146 tmp = irq_data->parent_data;
1147 irq_data->parent_data = NULL;
1148 irq_data->domain = NULL;
1152 tmp = tmp->parent_data;
1158 static int irq_domain_alloc_irq_data(struct irq_domain *domain,
1159 unsigned int virq, unsigned int nr_irqs)
1161 struct irq_data *irq_data;
1162 struct irq_domain *parent;
1165 /* The outermost irq_data is embedded in struct irq_desc */
1166 for (i = 0; i < nr_irqs; i++) {
1167 irq_data = irq_get_irq_data(virq + i);
1168 irq_data->domain = domain;
1170 for (parent = domain->parent; parent; parent = parent->parent) {
1171 irq_data = irq_domain_insert_irq_data(parent, irq_data);
1173 irq_domain_free_irq_data(virq, i + 1);
1183 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1184 * @domain: domain to match
1185 * @virq: IRQ number to get irq_data
1187 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1190 struct irq_data *irq_data;
1192 for (irq_data = irq_get_irq_data(virq); irq_data;
1193 irq_data = irq_data->parent_data)
1194 if (irq_data->domain == domain)
1199 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1202 * irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain
1203 * @domain: Interrupt domain to match
1205 * @hwirq: The hwirq number
1206 * @chip: The associated interrupt chip
1207 * @chip_data: The associated chip data
1209 int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq,
1210 irq_hw_number_t hwirq, struct irq_chip *chip,
1213 struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq);
1218 irq_data->hwirq = hwirq;
1219 irq_data->chip = chip ? chip : &no_irq_chip;
1220 irq_data->chip_data = chip_data;
1224 EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip);
1227 * irq_domain_set_info - Set the complete data for a @virq in @domain
1228 * @domain: Interrupt domain to match
1230 * @hwirq: The hardware interrupt number
1231 * @chip: The associated interrupt chip
1232 * @chip_data: The associated interrupt chip data
1233 * @handler: The interrupt flow handler
1234 * @handler_data: The interrupt flow handler data
1235 * @handler_name: The interrupt handler name
1237 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1238 irq_hw_number_t hwirq, struct irq_chip *chip,
1239 void *chip_data, irq_flow_handler_t handler,
1240 void *handler_data, const char *handler_name)
1242 irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data);
1243 __irq_set_handler(virq, handler, 0, handler_name);
1244 irq_set_handler_data(virq, handler_data);
1246 EXPORT_SYMBOL(irq_domain_set_info);
1249 * irq_domain_free_irqs_common - Clear irq_data and free the parent
1250 * @domain: Interrupt domain to match
1251 * @virq: IRQ number to start with
1252 * @nr_irqs: The number of irqs to free
1254 void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq,
1255 unsigned int nr_irqs)
1257 struct irq_data *irq_data;
1260 for (i = 0; i < nr_irqs; i++) {
1261 irq_data = irq_domain_get_irq_data(domain, virq + i);
1263 irq_domain_reset_irq_data(irq_data);
1265 irq_domain_free_irqs_parent(domain, virq, nr_irqs);
1267 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_common);
1270 * irq_domain_free_irqs_top - Clear handler and handler data, clear irqdata and free parent
1271 * @domain: Interrupt domain to match
1272 * @virq: IRQ number to start with
1273 * @nr_irqs: The number of irqs to free
1275 void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq,
1276 unsigned int nr_irqs)
1280 for (i = 0; i < nr_irqs; i++) {
1281 irq_set_handler_data(virq + i, NULL);
1282 irq_set_handler(virq + i, NULL);
1284 irq_domain_free_irqs_common(domain, virq, nr_irqs);
1287 static void irq_domain_free_irqs_hierarchy(struct irq_domain *domain,
1288 unsigned int irq_base,
1289 unsigned int nr_irqs)
1291 if (domain->ops->free)
1292 domain->ops->free(domain, irq_base, nr_irqs);
1295 int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,
1296 unsigned int irq_base,
1297 unsigned int nr_irqs, void *arg)
1299 if (!domain->ops->alloc) {
1300 pr_debug("domain->ops->alloc() is NULL\n");
1304 return domain->ops->alloc(domain, irq_base, nr_irqs, arg);
1308 * __irq_domain_alloc_irqs - Allocate IRQs from domain
1309 * @domain: domain to allocate from
1310 * @irq_base: allocate specified IRQ number if irq_base >= 0
1311 * @nr_irqs: number of IRQs to allocate
1312 * @node: NUMA node id for memory allocation
1313 * @arg: domain specific argument
1314 * @realloc: IRQ descriptors have already been allocated if true
1315 * @affinity: Optional irq affinity mask for multiqueue devices
1317 * Allocate IRQ numbers and initialized all data structures to support
1318 * hierarchy IRQ domains.
1319 * Parameter @realloc is mainly to support legacy IRQs.
1320 * Returns error code or allocated IRQ number
1322 * The whole process to setup an IRQ has been split into two steps.
1323 * The first step, __irq_domain_alloc_irqs(), is to allocate IRQ
1324 * descriptor and required hardware resources. The second step,
1325 * irq_domain_activate_irq(), is to program hardwares with preallocated
1326 * resources. In this way, it's easier to rollback when failing to
1327 * allocate resources.
1329 int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
1330 unsigned int nr_irqs, int node, void *arg,
1331 bool realloc, const struct irq_affinity_desc *affinity)
1335 if (domain == NULL) {
1336 domain = irq_default_domain;
1337 if (WARN(!domain, "domain is NULL; cannot allocate IRQ\n"))
1341 if (realloc && irq_base >= 0) {
1344 virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node,
1347 pr_debug("cannot allocate IRQ(base %d, count %d)\n",
1353 if (irq_domain_alloc_irq_data(domain, virq, nr_irqs)) {
1354 pr_debug("cannot allocate memory for IRQ%d\n", virq);
1359 mutex_lock(&irq_domain_mutex);
1360 ret = irq_domain_alloc_irqs_hierarchy(domain, virq, nr_irqs, arg);
1362 mutex_unlock(&irq_domain_mutex);
1363 goto out_free_irq_data;
1365 for (i = 0; i < nr_irqs; i++)
1366 irq_domain_insert_irq(virq + i);
1367 mutex_unlock(&irq_domain_mutex);
1372 irq_domain_free_irq_data(virq, nr_irqs);
1374 irq_free_descs(virq, nr_irqs);
1378 /* The irq_data was moved, fix the revmap to refer to the new location */
1379 static void irq_domain_fix_revmap(struct irq_data *d)
1383 if (d->hwirq < d->domain->revmap_size)
1384 return; /* Not using radix tree. */
1386 /* Fix up the revmap. */
1387 mutex_lock(&d->domain->revmap_tree_mutex);
1388 slot = radix_tree_lookup_slot(&d->domain->revmap_tree, d->hwirq);
1390 radix_tree_replace_slot(&d->domain->revmap_tree, slot, d);
1391 mutex_unlock(&d->domain->revmap_tree_mutex);
1395 * irq_domain_push_irq() - Push a domain in to the top of a hierarchy.
1396 * @domain: Domain to push.
1397 * @virq: Irq to push the domain in to.
1398 * @arg: Passed to the irq_domain_ops alloc() function.
1400 * For an already existing irqdomain hierarchy, as might be obtained
1401 * via a call to pci_enable_msix(), add an additional domain to the
1402 * head of the processing chain. Must be called before request_irq()
1405 int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg)
1407 struct irq_data *child_irq_data;
1408 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1409 struct irq_desc *desc;
1413 * Check that no action has been set, which indicates the virq
1414 * is in a state where this function doesn't have to deal with
1415 * races between interrupt handling and maintaining the
1416 * hierarchy. This will catch gross misuse. Attempting to
1417 * make the check race free would require holding locks across
1418 * calls to struct irq_domain_ops->alloc(), which could lead
1419 * to deadlock, so we just do a simple check before starting.
1421 desc = irq_to_desc(virq);
1424 if (WARN_ON(desc->action))
1430 if (WARN_ON(!irq_domain_is_hierarchy(domain)))
1436 if (domain->parent != root_irq_data->domain)
1439 child_irq_data = kzalloc_node(sizeof(*child_irq_data), GFP_KERNEL,
1440 irq_data_get_node(root_irq_data));
1441 if (!child_irq_data)
1444 mutex_lock(&irq_domain_mutex);
1446 /* Copy the original irq_data. */
1447 *child_irq_data = *root_irq_data;
1450 * Overwrite the root_irq_data, which is embedded in struct
1451 * irq_desc, with values for this domain.
1453 root_irq_data->parent_data = child_irq_data;
1454 root_irq_data->domain = domain;
1455 root_irq_data->mask = 0;
1456 root_irq_data->hwirq = 0;
1457 root_irq_data->chip = NULL;
1458 root_irq_data->chip_data = NULL;
1460 /* May (probably does) set hwirq, chip, etc. */
1461 rv = irq_domain_alloc_irqs_hierarchy(domain, virq, 1, arg);
1463 /* Restore the original irq_data. */
1464 *root_irq_data = *child_irq_data;
1465 kfree(child_irq_data);
1469 irq_domain_fix_revmap(child_irq_data);
1470 irq_domain_set_mapping(domain, root_irq_data->hwirq, root_irq_data);
1473 mutex_unlock(&irq_domain_mutex);
1477 EXPORT_SYMBOL_GPL(irq_domain_push_irq);
1480 * irq_domain_pop_irq() - Remove a domain from the top of a hierarchy.
1481 * @domain: Domain to remove.
1482 * @virq: Irq to remove the domain from.
1484 * Undo the effects of a call to irq_domain_push_irq(). Must be
1485 * called either before request_irq() or after free_irq().
1487 int irq_domain_pop_irq(struct irq_domain *domain, int virq)
1489 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1490 struct irq_data *child_irq_data;
1491 struct irq_data *tmp_irq_data;
1492 struct irq_desc *desc;
1495 * Check that no action is set, which indicates the virq is in
1496 * a state where this function doesn't have to deal with races
1497 * between interrupt handling and maintaining the hierarchy.
1498 * This will catch gross misuse. Attempting to make the check
1499 * race free would require holding locks across calls to
1500 * struct irq_domain_ops->free(), which could lead to
1501 * deadlock, so we just do a simple check before starting.
1503 desc = irq_to_desc(virq);
1506 if (WARN_ON(desc->action))
1515 tmp_irq_data = irq_domain_get_irq_data(domain, virq);
1517 /* We can only "pop" if this domain is at the top of the list */
1518 if (WARN_ON(root_irq_data != tmp_irq_data))
1521 if (WARN_ON(root_irq_data->domain != domain))
1524 child_irq_data = root_irq_data->parent_data;
1525 if (WARN_ON(!child_irq_data))
1528 mutex_lock(&irq_domain_mutex);
1530 root_irq_data->parent_data = NULL;
1532 irq_domain_clear_mapping(domain, root_irq_data->hwirq);
1533 irq_domain_free_irqs_hierarchy(domain, virq, 1);
1535 /* Restore the original irq_data. */
1536 *root_irq_data = *child_irq_data;
1538 irq_domain_fix_revmap(root_irq_data);
1540 mutex_unlock(&irq_domain_mutex);
1542 kfree(child_irq_data);
1546 EXPORT_SYMBOL_GPL(irq_domain_pop_irq);
1549 * irq_domain_free_irqs - Free IRQ number and associated data structures
1550 * @virq: base IRQ number
1551 * @nr_irqs: number of IRQs to free
1553 void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs)
1555 struct irq_data *data = irq_get_irq_data(virq);
1558 if (WARN(!data || !data->domain || !data->domain->ops->free,
1559 "NULL pointer, cannot free irq\n"))
1562 mutex_lock(&irq_domain_mutex);
1563 for (i = 0; i < nr_irqs; i++)
1564 irq_domain_remove_irq(virq + i);
1565 irq_domain_free_irqs_hierarchy(data->domain, virq, nr_irqs);
1566 mutex_unlock(&irq_domain_mutex);
1568 irq_domain_free_irq_data(virq, nr_irqs);
1569 irq_free_descs(virq, nr_irqs);
1573 * irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain
1574 * @irq_base: Base IRQ number
1575 * @nr_irqs: Number of IRQs to allocate
1576 * @arg: Allocation data (arch/domain specific)
1578 * Check whether the domain has been setup recursive. If not allocate
1579 * through the parent domain.
1581 int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
1582 unsigned int irq_base, unsigned int nr_irqs,
1585 if (!domain->parent)
1588 return irq_domain_alloc_irqs_hierarchy(domain->parent, irq_base,
1591 EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent);
1594 * irq_domain_free_irqs_parent - Free interrupts from parent domain
1595 * @irq_base: Base IRQ number
1596 * @nr_irqs: Number of IRQs to free
1598 * Check whether the domain has been setup recursive. If not free
1599 * through the parent domain.
1601 void irq_domain_free_irqs_parent(struct irq_domain *domain,
1602 unsigned int irq_base, unsigned int nr_irqs)
1604 if (!domain->parent)
1607 irq_domain_free_irqs_hierarchy(domain->parent, irq_base, nr_irqs);
1609 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent);
1611 static void __irq_domain_deactivate_irq(struct irq_data *irq_data)
1613 if (irq_data && irq_data->domain) {
1614 struct irq_domain *domain = irq_data->domain;
1616 if (domain->ops->deactivate)
1617 domain->ops->deactivate(domain, irq_data);
1618 if (irq_data->parent_data)
1619 __irq_domain_deactivate_irq(irq_data->parent_data);
1623 static int __irq_domain_activate_irq(struct irq_data *irqd, bool reserve)
1627 if (irqd && irqd->domain) {
1628 struct irq_domain *domain = irqd->domain;
1630 if (irqd->parent_data)
1631 ret = __irq_domain_activate_irq(irqd->parent_data,
1633 if (!ret && domain->ops->activate) {
1634 ret = domain->ops->activate(domain, irqd, reserve);
1635 /* Rollback in case of error */
1636 if (ret && irqd->parent_data)
1637 __irq_domain_deactivate_irq(irqd->parent_data);
1644 * irq_domain_activate_irq - Call domain_ops->activate recursively to activate
1646 * @irq_data: Outermost irq_data associated with interrupt
1647 * @reserve: If set only reserve an interrupt vector instead of assigning one
1649 * This is the second step to call domain_ops->activate to program interrupt
1650 * controllers, so the interrupt could actually get delivered.
1652 int irq_domain_activate_irq(struct irq_data *irq_data, bool reserve)
1656 if (!irqd_is_activated(irq_data))
1657 ret = __irq_domain_activate_irq(irq_data, reserve);
1659 irqd_set_activated(irq_data);
1664 * irq_domain_deactivate_irq - Call domain_ops->deactivate recursively to
1665 * deactivate interrupt
1666 * @irq_data: outermost irq_data associated with interrupt
1668 * It calls domain_ops->deactivate to program interrupt controllers to disable
1669 * interrupt delivery.
1671 void irq_domain_deactivate_irq(struct irq_data *irq_data)
1673 if (irqd_is_activated(irq_data)) {
1674 __irq_domain_deactivate_irq(irq_data);
1675 irqd_clr_activated(irq_data);
1679 static void irq_domain_check_hierarchy(struct irq_domain *domain)
1681 /* Hierarchy irq_domains must implement callback alloc() */
1682 if (domain->ops->alloc)
1683 domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY;
1687 * irq_domain_hierarchical_is_msi_remap - Check if the domain or any
1688 * parent has MSI remapping support
1689 * @domain: domain pointer
1691 bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain)
1693 for (; domain; domain = domain->parent) {
1694 if (irq_domain_is_msi_remap(domain))
1699 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1701 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1702 * @domain: domain to match
1703 * @virq: IRQ number to get irq_data
1705 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1708 struct irq_data *irq_data = irq_get_irq_data(virq);
1710 return (irq_data && irq_data->domain == domain) ? irq_data : NULL;
1712 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1715 * irq_domain_set_info - Set the complete data for a @virq in @domain
1716 * @domain: Interrupt domain to match
1718 * @hwirq: The hardware interrupt number
1719 * @chip: The associated interrupt chip
1720 * @chip_data: The associated interrupt chip data
1721 * @handler: The interrupt flow handler
1722 * @handler_data: The interrupt flow handler data
1723 * @handler_name: The interrupt handler name
1725 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1726 irq_hw_number_t hwirq, struct irq_chip *chip,
1727 void *chip_data, irq_flow_handler_t handler,
1728 void *handler_data, const char *handler_name)
1730 irq_set_chip_and_handler_name(virq, chip, handler, handler_name);
1731 irq_set_chip_data(virq, chip_data);
1732 irq_set_handler_data(virq, handler_data);
1735 static void irq_domain_check_hierarchy(struct irq_domain *domain)
1738 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1740 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
1741 static struct dentry *domain_dir;
1744 irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind)
1746 seq_printf(m, "%*sname: %s\n", ind, "", d->name);
1747 seq_printf(m, "%*ssize: %u\n", ind + 1, "",
1748 d->revmap_size + d->revmap_direct_max_irq);
1749 seq_printf(m, "%*smapped: %u\n", ind + 1, "", d->mapcount);
1750 seq_printf(m, "%*sflags: 0x%08x\n", ind +1 , "", d->flags);
1751 if (d->ops && d->ops->debug_show)
1752 d->ops->debug_show(m, d, NULL, ind + 1);
1753 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1756 seq_printf(m, "%*sparent: %s\n", ind + 1, "", d->parent->name);
1757 irq_domain_debug_show_one(m, d->parent, ind + 4);
1761 static int irq_domain_debug_show(struct seq_file *m, void *p)
1763 struct irq_domain *d = m->private;
1765 /* Default domain? Might be NULL */
1767 if (!irq_default_domain)
1769 d = irq_default_domain;
1771 irq_domain_debug_show_one(m, d, 0);
1774 DEFINE_SHOW_ATTRIBUTE(irq_domain_debug);
1776 static void debugfs_add_domain_dir(struct irq_domain *d)
1778 if (!d->name || !domain_dir || d->debugfs_file)
1780 d->debugfs_file = debugfs_create_file(d->name, 0444, domain_dir, d,
1781 &irq_domain_debug_fops);
1784 static void debugfs_remove_domain_dir(struct irq_domain *d)
1786 debugfs_remove(d->debugfs_file);
1787 d->debugfs_file = NULL;
1790 void __init irq_domain_debugfs_init(struct dentry *root)
1792 struct irq_domain *d;
1794 domain_dir = debugfs_create_dir("domains", root);
1796 debugfs_create_file("default", 0444, domain_dir, NULL,
1797 &irq_domain_debug_fops);
1798 mutex_lock(&irq_domain_mutex);
1799 list_for_each_entry(d, &irq_domain_list, link)
1800 debugfs_add_domain_dir(d);
1801 mutex_unlock(&irq_domain_mutex);