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 return irq_domain_create_legacy(of_node_to_fwnode(of_node), size,
355 first_irq, first_hwirq, ops, host_data);
357 EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
359 struct irq_domain *irq_domain_create_legacy(struct fwnode_handle *fwnode,
361 unsigned int first_irq,
362 irq_hw_number_t first_hwirq,
363 const struct irq_domain_ops *ops,
366 struct irq_domain *domain;
368 domain = __irq_domain_add(fwnode, first_hwirq + size, first_hwirq + size, 0, ops, host_data);
370 irq_domain_associate_many(domain, first_irq, first_hwirq, size);
374 EXPORT_SYMBOL_GPL(irq_domain_create_legacy);
377 * irq_find_matching_fwspec() - Locates a domain for a given fwspec
378 * @fwspec: FW specifier for an interrupt
379 * @bus_token: domain-specific data
381 struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
382 enum irq_domain_bus_token bus_token)
384 struct irq_domain *h, *found = NULL;
385 struct fwnode_handle *fwnode = fwspec->fwnode;
388 /* We might want to match the legacy controller last since
389 * it might potentially be set to match all interrupts in
390 * the absence of a device node. This isn't a problem so far
393 * bus_token == DOMAIN_BUS_ANY matches any domain, any other
394 * values must generate an exact match for the domain to be
397 mutex_lock(&irq_domain_mutex);
398 list_for_each_entry(h, &irq_domain_list, link) {
399 if (h->ops->select && fwspec->param_count)
400 rc = h->ops->select(h, fwspec, bus_token);
401 else if (h->ops->match)
402 rc = h->ops->match(h, to_of_node(fwnode), bus_token);
404 rc = ((fwnode != NULL) && (h->fwnode == fwnode) &&
405 ((bus_token == DOMAIN_BUS_ANY) ||
406 (h->bus_token == bus_token)));
413 mutex_unlock(&irq_domain_mutex);
416 EXPORT_SYMBOL_GPL(irq_find_matching_fwspec);
419 * irq_domain_check_msi_remap - Check whether all MSI irq domains implement
422 * Return: false if any MSI irq domain does not support IRQ remapping,
423 * true otherwise (including if there is no MSI irq domain)
425 bool irq_domain_check_msi_remap(void)
427 struct irq_domain *h;
430 mutex_lock(&irq_domain_mutex);
431 list_for_each_entry(h, &irq_domain_list, link) {
432 if (irq_domain_is_msi(h) &&
433 !irq_domain_hierarchical_is_msi_remap(h)) {
438 mutex_unlock(&irq_domain_mutex);
441 EXPORT_SYMBOL_GPL(irq_domain_check_msi_remap);
444 * irq_set_default_host() - Set a "default" irq domain
445 * @domain: default domain pointer
447 * For convenience, it's possible to set a "default" domain that will be used
448 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
449 * platforms that want to manipulate a few hard coded interrupt numbers that
450 * aren't properly represented in the device-tree.
452 void irq_set_default_host(struct irq_domain *domain)
454 pr_debug("Default domain set to @0x%p\n", domain);
456 irq_default_domain = domain;
458 EXPORT_SYMBOL_GPL(irq_set_default_host);
461 * irq_get_default_host() - Retrieve the "default" irq domain
463 * Returns: the default domain, if any.
465 * Modern code should never use this. This should only be used on
466 * systems that cannot implement a firmware->fwnode mapping (which
467 * both DT and ACPI provide).
469 struct irq_domain *irq_get_default_host(void)
471 return irq_default_domain;
474 static void irq_domain_clear_mapping(struct irq_domain *domain,
475 irq_hw_number_t hwirq)
477 if (hwirq < domain->revmap_size) {
478 domain->linear_revmap[hwirq] = 0;
480 mutex_lock(&domain->revmap_tree_mutex);
481 radix_tree_delete(&domain->revmap_tree, hwirq);
482 mutex_unlock(&domain->revmap_tree_mutex);
486 static void irq_domain_set_mapping(struct irq_domain *domain,
487 irq_hw_number_t hwirq,
488 struct irq_data *irq_data)
490 if (hwirq < domain->revmap_size) {
491 domain->linear_revmap[hwirq] = irq_data->irq;
493 mutex_lock(&domain->revmap_tree_mutex);
494 radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
495 mutex_unlock(&domain->revmap_tree_mutex);
499 static void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
501 struct irq_data *irq_data = irq_get_irq_data(irq);
502 irq_hw_number_t hwirq;
504 if (WARN(!irq_data || irq_data->domain != domain,
505 "virq%i doesn't exist; cannot disassociate\n", irq))
508 hwirq = irq_data->hwirq;
509 irq_set_status_flags(irq, IRQ_NOREQUEST);
511 /* remove chip and handler */
512 irq_set_chip_and_handler(irq, NULL, NULL);
514 /* Make sure it's completed */
515 synchronize_irq(irq);
517 /* Tell the PIC about it */
518 if (domain->ops->unmap)
519 domain->ops->unmap(domain, irq);
522 irq_data->domain = NULL;
526 /* Clear reverse map for this hwirq */
527 irq_domain_clear_mapping(domain, hwirq);
530 int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
531 irq_hw_number_t hwirq)
533 struct irq_data *irq_data = irq_get_irq_data(virq);
536 if (WARN(hwirq >= domain->hwirq_max,
537 "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name))
539 if (WARN(!irq_data, "error: virq%i is not allocated", virq))
541 if (WARN(irq_data->domain, "error: virq%i is already associated", virq))
544 mutex_lock(&irq_domain_mutex);
545 irq_data->hwirq = hwirq;
546 irq_data->domain = domain;
547 if (domain->ops->map) {
548 ret = domain->ops->map(domain, virq, hwirq);
551 * If map() returns -EPERM, this interrupt is protected
552 * by the firmware or some other service and shall not
553 * be mapped. Don't bother telling the user about it.
556 pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n",
557 domain->name, hwirq, virq, ret);
559 irq_data->domain = NULL;
561 mutex_unlock(&irq_domain_mutex);
565 /* If not already assigned, give the domain the chip's name */
566 if (!domain->name && irq_data->chip)
567 domain->name = irq_data->chip->name;
571 irq_domain_set_mapping(domain, hwirq, irq_data);
572 mutex_unlock(&irq_domain_mutex);
574 irq_clear_status_flags(virq, IRQ_NOREQUEST);
578 EXPORT_SYMBOL_GPL(irq_domain_associate);
580 void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
581 irq_hw_number_t hwirq_base, int count)
583 struct device_node *of_node;
586 of_node = irq_domain_get_of_node(domain);
587 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
588 of_node_full_name(of_node), irq_base, (int)hwirq_base, count);
590 for (i = 0; i < count; i++) {
591 irq_domain_associate(domain, irq_base + i, hwirq_base + i);
594 EXPORT_SYMBOL_GPL(irq_domain_associate_many);
597 * irq_create_direct_mapping() - Allocate an irq for direct mapping
598 * @domain: domain to allocate the irq for or NULL for default domain
600 * This routine is used for irq controllers which can choose the hardware
601 * interrupt numbers they generate. In such a case it's simplest to use
602 * the linux irq as the hardware interrupt number. It still uses the linear
603 * or radix tree to store the mapping, but the irq controller can optimize
604 * the revmap path by using the hwirq directly.
606 unsigned int irq_create_direct_mapping(struct irq_domain *domain)
608 struct device_node *of_node;
612 domain = irq_default_domain;
614 of_node = irq_domain_get_of_node(domain);
615 virq = irq_alloc_desc_from(1, of_node_to_nid(of_node));
617 pr_debug("create_direct virq allocation failed\n");
620 if (virq >= domain->revmap_direct_max_irq) {
621 pr_err("ERROR: no free irqs available below %i maximum\n",
622 domain->revmap_direct_max_irq);
626 pr_debug("create_direct obtained virq %d\n", virq);
628 if (irq_domain_associate(domain, virq, virq)) {
635 EXPORT_SYMBOL_GPL(irq_create_direct_mapping);
638 * irq_create_mapping() - Map a hardware interrupt into linux irq space
639 * @domain: domain owning this hardware interrupt or NULL for default domain
640 * @hwirq: hardware irq number in that domain space
642 * Only one mapping per hardware interrupt is permitted. Returns a linux
644 * If the sense/trigger is to be specified, set_irq_type() should be called
645 * on the number returned from that call.
647 unsigned int irq_create_mapping(struct irq_domain *domain,
648 irq_hw_number_t hwirq)
650 struct device_node *of_node;
653 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
655 /* Look for default domain if nececssary */
657 domain = irq_default_domain;
658 if (domain == NULL) {
659 WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq);
662 pr_debug("-> using domain @%p\n", domain);
664 of_node = irq_domain_get_of_node(domain);
666 /* Check if mapping already exists */
667 virq = irq_find_mapping(domain, hwirq);
669 pr_debug("-> existing mapping on virq %d\n", virq);
673 /* Allocate a virtual interrupt number */
674 virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node), NULL);
676 pr_debug("-> virq allocation failed\n");
680 if (irq_domain_associate(domain, virq, hwirq)) {
685 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
686 hwirq, of_node_full_name(of_node), virq);
690 EXPORT_SYMBOL_GPL(irq_create_mapping);
693 * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs
694 * @domain: domain owning the interrupt range
695 * @irq_base: beginning of linux IRQ range
696 * @hwirq_base: beginning of hardware IRQ range
697 * @count: Number of interrupts to map
699 * This routine is used for allocating and mapping a range of hardware
700 * irqs to linux irqs where the linux irq numbers are at pre-defined
701 * locations. For use by controllers that already have static mappings
702 * to insert in to the domain.
704 * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time
707 * 0 is returned upon success, while any failure to establish a static
708 * mapping is treated as an error.
710 int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base,
711 irq_hw_number_t hwirq_base, int count)
713 struct device_node *of_node;
716 of_node = irq_domain_get_of_node(domain);
717 ret = irq_alloc_descs(irq_base, irq_base, count,
718 of_node_to_nid(of_node));
719 if (unlikely(ret < 0))
722 irq_domain_associate_many(domain, irq_base, hwirq_base, count);
725 EXPORT_SYMBOL_GPL(irq_create_strict_mappings);
727 static int irq_domain_translate(struct irq_domain *d,
728 struct irq_fwspec *fwspec,
729 irq_hw_number_t *hwirq, unsigned int *type)
731 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
732 if (d->ops->translate)
733 return d->ops->translate(d, fwspec, hwirq, type);
736 return d->ops->xlate(d, to_of_node(fwspec->fwnode),
737 fwspec->param, fwspec->param_count,
740 /* If domain has no translation, then we assume interrupt line */
741 *hwirq = fwspec->param[0];
745 static void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,
747 struct irq_fwspec *fwspec)
751 fwspec->fwnode = of_node_to_fwnode(np);
752 fwspec->param_count = count;
754 for (i = 0; i < count; i++)
755 fwspec->param[i] = args[i];
758 unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
760 struct irq_domain *domain;
761 struct irq_data *irq_data;
762 irq_hw_number_t hwirq;
763 unsigned int type = IRQ_TYPE_NONE;
766 if (fwspec->fwnode) {
767 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_WIRED);
769 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_ANY);
771 domain = irq_default_domain;
775 pr_warn("no irq domain found for %s !\n",
776 of_node_full_name(to_of_node(fwspec->fwnode)));
780 if (irq_domain_translate(domain, fwspec, &hwirq, &type))
784 * WARN if the irqchip returns a type with bits
785 * outside the sense mask set and clear these bits.
787 if (WARN_ON(type & ~IRQ_TYPE_SENSE_MASK))
788 type &= IRQ_TYPE_SENSE_MASK;
791 * If we've already configured this interrupt,
792 * don't do it again, or hell will break loose.
794 virq = irq_find_mapping(domain, hwirq);
797 * If the trigger type is not specified or matches the
798 * current trigger type then we are done so return the
801 if (type == IRQ_TYPE_NONE || type == irq_get_trigger_type(virq))
805 * If the trigger type has not been set yet, then set
806 * it now and return the interrupt number.
808 if (irq_get_trigger_type(virq) == IRQ_TYPE_NONE) {
809 irq_data = irq_get_irq_data(virq);
813 irqd_set_trigger_type(irq_data, type);
817 pr_warn("type mismatch, failed to map hwirq-%lu for %s!\n",
818 hwirq, of_node_full_name(to_of_node(fwspec->fwnode)));
822 if (irq_domain_is_hierarchy(domain)) {
823 virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, fwspec);
828 virq = irq_create_mapping(domain, hwirq);
833 irq_data = irq_get_irq_data(virq);
835 if (irq_domain_is_hierarchy(domain))
836 irq_domain_free_irqs(virq, 1);
838 irq_dispose_mapping(virq);
842 /* Store trigger type */
843 irqd_set_trigger_type(irq_data, type);
847 EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping);
849 unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data)
851 struct irq_fwspec fwspec;
853 of_phandle_args_to_fwspec(irq_data->np, irq_data->args,
854 irq_data->args_count, &fwspec);
856 return irq_create_fwspec_mapping(&fwspec);
858 EXPORT_SYMBOL_GPL(irq_create_of_mapping);
861 * irq_dispose_mapping() - Unmap an interrupt
862 * @virq: linux irq number of the interrupt to unmap
864 void irq_dispose_mapping(unsigned int virq)
866 struct irq_data *irq_data = irq_get_irq_data(virq);
867 struct irq_domain *domain;
869 if (!virq || !irq_data)
872 domain = irq_data->domain;
873 if (WARN_ON(domain == NULL))
876 if (irq_domain_is_hierarchy(domain)) {
877 irq_domain_free_irqs(virq, 1);
879 irq_domain_disassociate(domain, virq);
883 EXPORT_SYMBOL_GPL(irq_dispose_mapping);
886 * irq_find_mapping() - Find a linux irq from a hw irq number.
887 * @domain: domain owning this hardware interrupt
888 * @hwirq: hardware irq number in that domain space
890 unsigned int irq_find_mapping(struct irq_domain *domain,
891 irq_hw_number_t hwirq)
893 struct irq_data *data;
895 /* Look for default domain if nececssary */
897 domain = irq_default_domain;
901 if (hwirq < domain->revmap_direct_max_irq) {
902 data = irq_domain_get_irq_data(domain, hwirq);
903 if (data && data->hwirq == hwirq)
907 /* Check if the hwirq is in the linear revmap. */
908 if (hwirq < domain->revmap_size)
909 return domain->linear_revmap[hwirq];
912 data = radix_tree_lookup(&domain->revmap_tree, hwirq);
914 return data ? data->irq : 0;
916 EXPORT_SYMBOL_GPL(irq_find_mapping);
919 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
921 * Device Tree IRQ specifier translation function which works with one cell
922 * bindings where the cell value maps directly to the hwirq number.
924 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
925 const u32 *intspec, unsigned int intsize,
926 unsigned long *out_hwirq, unsigned int *out_type)
928 if (WARN_ON(intsize < 1))
930 *out_hwirq = intspec[0];
931 *out_type = IRQ_TYPE_NONE;
934 EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell);
937 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings
939 * Device Tree IRQ specifier translation function which works with two cell
940 * bindings where the cell values map directly to the hwirq number
941 * and linux irq flags.
943 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
944 const u32 *intspec, unsigned int intsize,
945 irq_hw_number_t *out_hwirq, unsigned int *out_type)
947 struct irq_fwspec fwspec;
949 of_phandle_args_to_fwspec(ctrlr, intspec, intsize, &fwspec);
950 return irq_domain_translate_twocell(d, &fwspec, out_hwirq, out_type);
952 EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell);
955 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings
957 * Device Tree IRQ specifier translation function which works with either one
958 * or two cell bindings where the cell values map directly to the hwirq number
959 * and linux irq flags.
961 * Note: don't use this function unless your interrupt controller explicitly
962 * supports both one and two cell bindings. For the majority of controllers
963 * the _onecell() or _twocell() variants above should be used.
965 int irq_domain_xlate_onetwocell(struct irq_domain *d,
966 struct device_node *ctrlr,
967 const u32 *intspec, unsigned int intsize,
968 unsigned long *out_hwirq, unsigned int *out_type)
970 if (WARN_ON(intsize < 1))
972 *out_hwirq = intspec[0];
974 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
976 *out_type = IRQ_TYPE_NONE;
979 EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell);
981 const struct irq_domain_ops irq_domain_simple_ops = {
982 .xlate = irq_domain_xlate_onetwocell,
984 EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
987 * irq_domain_translate_onecell() - Generic translate for direct one cell
990 int irq_domain_translate_onecell(struct irq_domain *d,
991 struct irq_fwspec *fwspec,
992 unsigned long *out_hwirq,
993 unsigned int *out_type)
995 if (WARN_ON(fwspec->param_count < 1))
997 *out_hwirq = fwspec->param[0];
998 *out_type = IRQ_TYPE_NONE;
1001 EXPORT_SYMBOL_GPL(irq_domain_translate_onecell);
1004 * irq_domain_translate_twocell() - Generic translate for direct two cell
1007 * Device Tree IRQ specifier translation function which works with two cell
1008 * bindings where the cell values map directly to the hwirq number
1009 * and linux irq flags.
1011 int irq_domain_translate_twocell(struct irq_domain *d,
1012 struct irq_fwspec *fwspec,
1013 unsigned long *out_hwirq,
1014 unsigned int *out_type)
1016 if (WARN_ON(fwspec->param_count < 2))
1018 *out_hwirq = fwspec->param[0];
1019 *out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;
1022 EXPORT_SYMBOL_GPL(irq_domain_translate_twocell);
1024 int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq,
1025 int node, const struct irq_affinity_desc *affinity)
1030 virq = __irq_alloc_descs(virq, virq, cnt, node, THIS_MODULE,
1033 hint = hwirq % nr_irqs;
1036 virq = __irq_alloc_descs(-1, hint, cnt, node, THIS_MODULE,
1038 if (virq <= 0 && hint > 1) {
1039 virq = __irq_alloc_descs(-1, 1, cnt, node, THIS_MODULE,
1048 * irq_domain_reset_irq_data - Clear hwirq, chip and chip_data in @irq_data
1049 * @irq_data: The pointer to irq_data
1051 void irq_domain_reset_irq_data(struct irq_data *irq_data)
1053 irq_data->hwirq = 0;
1054 irq_data->chip = &no_irq_chip;
1055 irq_data->chip_data = NULL;
1057 EXPORT_SYMBOL_GPL(irq_domain_reset_irq_data);
1059 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1061 * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy
1062 * @parent: Parent irq domain to associate with the new domain
1063 * @flags: Irq domain flags associated to the domain
1064 * @size: Size of the domain. See below
1065 * @fwnode: Optional fwnode of the interrupt controller
1066 * @ops: Pointer to the interrupt domain callbacks
1067 * @host_data: Controller private data pointer
1069 * If @size is 0 a tree domain is created, otherwise a linear domain.
1071 * If successful the parent is associated to the new domain and the
1072 * domain flags are set.
1073 * Returns pointer to IRQ domain, or NULL on failure.
1075 struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
1078 struct fwnode_handle *fwnode,
1079 const struct irq_domain_ops *ops,
1082 struct irq_domain *domain;
1085 domain = irq_domain_create_linear(fwnode, size, ops, host_data);
1087 domain = irq_domain_create_tree(fwnode, ops, host_data);
1089 domain->parent = parent;
1090 domain->flags |= flags;
1095 EXPORT_SYMBOL_GPL(irq_domain_create_hierarchy);
1097 static void irq_domain_insert_irq(int virq)
1099 struct irq_data *data;
1101 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1102 struct irq_domain *domain = data->domain;
1105 irq_domain_set_mapping(domain, data->hwirq, data);
1107 /* If not already assigned, give the domain the chip's name */
1108 if (!domain->name && data->chip)
1109 domain->name = data->chip->name;
1112 irq_clear_status_flags(virq, IRQ_NOREQUEST);
1115 static void irq_domain_remove_irq(int virq)
1117 struct irq_data *data;
1119 irq_set_status_flags(virq, IRQ_NOREQUEST);
1120 irq_set_chip_and_handler(virq, NULL, NULL);
1121 synchronize_irq(virq);
1124 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1125 struct irq_domain *domain = data->domain;
1126 irq_hw_number_t hwirq = data->hwirq;
1129 irq_domain_clear_mapping(domain, hwirq);
1133 static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain,
1134 struct irq_data *child)
1136 struct irq_data *irq_data;
1138 irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL,
1139 irq_data_get_node(child));
1141 child->parent_data = irq_data;
1142 irq_data->irq = child->irq;
1143 irq_data->common = child->common;
1144 irq_data->domain = domain;
1150 static void __irq_domain_free_hierarchy(struct irq_data *irq_data)
1152 struct irq_data *tmp;
1156 irq_data = irq_data->parent_data;
1161 static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs)
1163 struct irq_data *irq_data, *tmp;
1166 for (i = 0; i < nr_irqs; i++) {
1167 irq_data = irq_get_irq_data(virq + i);
1168 tmp = irq_data->parent_data;
1169 irq_data->parent_data = NULL;
1170 irq_data->domain = NULL;
1172 __irq_domain_free_hierarchy(tmp);
1177 * irq_domain_disconnect_hierarchy - Mark the first unused level of a hierarchy
1178 * @domain: IRQ domain from which the hierarchy is to be disconnected
1179 * @virq: IRQ number where the hierarchy is to be trimmed
1181 * Marks the @virq level belonging to @domain as disconnected.
1182 * Returns -EINVAL if @virq doesn't have a valid irq_data pointing
1185 * Its only use is to be able to trim levels of hierarchy that do not
1186 * have any real meaning for this interrupt, and that the driver marks
1187 * as such from its .alloc() callback.
1189 int irq_domain_disconnect_hierarchy(struct irq_domain *domain,
1192 struct irq_data *irqd;
1194 irqd = irq_domain_get_irq_data(domain, virq);
1198 irqd->chip = ERR_PTR(-ENOTCONN);
1202 static int irq_domain_trim_hierarchy(unsigned int virq)
1204 struct irq_data *tail, *irqd, *irq_data;
1206 irq_data = irq_get_irq_data(virq);
1209 /* The first entry must have a valid irqchip */
1210 if (!irq_data->chip || IS_ERR(irq_data->chip))
1214 * Validate that the irq_data chain is sane in the presence of
1215 * a hierarchy trimming marker.
1217 for (irqd = irq_data->parent_data; irqd; irq_data = irqd, irqd = irqd->parent_data) {
1218 /* Can't have a valid irqchip after a trim marker */
1219 if (irqd->chip && tail)
1222 /* Can't have an empty irqchip before a trim marker */
1223 if (!irqd->chip && !tail)
1226 if (IS_ERR(irqd->chip)) {
1227 /* Only -ENOTCONN is a valid trim marker */
1228 if (PTR_ERR(irqd->chip) != -ENOTCONN)
1235 /* No trim marker, nothing to do */
1239 pr_info("IRQ%d: trimming hierarchy from %s\n",
1240 virq, tail->parent_data->domain->name);
1242 /* Sever the inner part of the hierarchy... */
1244 tail = tail->parent_data;
1245 irqd->parent_data = NULL;
1246 __irq_domain_free_hierarchy(tail);
1251 static int irq_domain_alloc_irq_data(struct irq_domain *domain,
1252 unsigned int virq, unsigned int nr_irqs)
1254 struct irq_data *irq_data;
1255 struct irq_domain *parent;
1258 /* The outermost irq_data is embedded in struct irq_desc */
1259 for (i = 0; i < nr_irqs; i++) {
1260 irq_data = irq_get_irq_data(virq + i);
1261 irq_data->domain = domain;
1263 for (parent = domain->parent; parent; parent = parent->parent) {
1264 irq_data = irq_domain_insert_irq_data(parent, irq_data);
1266 irq_domain_free_irq_data(virq, i + 1);
1276 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1277 * @domain: domain to match
1278 * @virq: IRQ number to get irq_data
1280 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1283 struct irq_data *irq_data;
1285 for (irq_data = irq_get_irq_data(virq); irq_data;
1286 irq_data = irq_data->parent_data)
1287 if (irq_data->domain == domain)
1292 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1295 * irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain
1296 * @domain: Interrupt domain to match
1298 * @hwirq: The hwirq number
1299 * @chip: The associated interrupt chip
1300 * @chip_data: The associated chip data
1302 int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq,
1303 irq_hw_number_t hwirq, struct irq_chip *chip,
1306 struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq);
1311 irq_data->hwirq = hwirq;
1312 irq_data->chip = chip ? chip : &no_irq_chip;
1313 irq_data->chip_data = chip_data;
1317 EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip);
1320 * irq_domain_set_info - Set the complete data for a @virq in @domain
1321 * @domain: Interrupt domain to match
1323 * @hwirq: The hardware interrupt number
1324 * @chip: The associated interrupt chip
1325 * @chip_data: The associated interrupt chip data
1326 * @handler: The interrupt flow handler
1327 * @handler_data: The interrupt flow handler data
1328 * @handler_name: The interrupt handler name
1330 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1331 irq_hw_number_t hwirq, struct irq_chip *chip,
1332 void *chip_data, irq_flow_handler_t handler,
1333 void *handler_data, const char *handler_name)
1335 irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data);
1336 __irq_set_handler(virq, handler, 0, handler_name);
1337 irq_set_handler_data(virq, handler_data);
1339 EXPORT_SYMBOL(irq_domain_set_info);
1342 * irq_domain_free_irqs_common - Clear irq_data and free the parent
1343 * @domain: Interrupt domain to match
1344 * @virq: IRQ number to start with
1345 * @nr_irqs: The number of irqs to free
1347 void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq,
1348 unsigned int nr_irqs)
1350 struct irq_data *irq_data;
1353 for (i = 0; i < nr_irqs; i++) {
1354 irq_data = irq_domain_get_irq_data(domain, virq + i);
1356 irq_domain_reset_irq_data(irq_data);
1358 irq_domain_free_irqs_parent(domain, virq, nr_irqs);
1360 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_common);
1363 * irq_domain_free_irqs_top - Clear handler and handler data, clear irqdata and free parent
1364 * @domain: Interrupt domain to match
1365 * @virq: IRQ number to start with
1366 * @nr_irqs: The number of irqs to free
1368 void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq,
1369 unsigned int nr_irqs)
1373 for (i = 0; i < nr_irqs; i++) {
1374 irq_set_handler_data(virq + i, NULL);
1375 irq_set_handler(virq + i, NULL);
1377 irq_domain_free_irqs_common(domain, virq, nr_irqs);
1380 static void irq_domain_free_irqs_hierarchy(struct irq_domain *domain,
1381 unsigned int irq_base,
1382 unsigned int nr_irqs)
1384 if (domain->ops->free)
1385 domain->ops->free(domain, irq_base, nr_irqs);
1388 int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,
1389 unsigned int irq_base,
1390 unsigned int nr_irqs, void *arg)
1392 if (!domain->ops->alloc) {
1393 pr_debug("domain->ops->alloc() is NULL\n");
1397 return domain->ops->alloc(domain, irq_base, nr_irqs, arg);
1401 * __irq_domain_alloc_irqs - Allocate IRQs from domain
1402 * @domain: domain to allocate from
1403 * @irq_base: allocate specified IRQ number if irq_base >= 0
1404 * @nr_irqs: number of IRQs to allocate
1405 * @node: NUMA node id for memory allocation
1406 * @arg: domain specific argument
1407 * @realloc: IRQ descriptors have already been allocated if true
1408 * @affinity: Optional irq affinity mask for multiqueue devices
1410 * Allocate IRQ numbers and initialized all data structures to support
1411 * hierarchy IRQ domains.
1412 * Parameter @realloc is mainly to support legacy IRQs.
1413 * Returns error code or allocated IRQ number
1415 * The whole process to setup an IRQ has been split into two steps.
1416 * The first step, __irq_domain_alloc_irqs(), is to allocate IRQ
1417 * descriptor and required hardware resources. The second step,
1418 * irq_domain_activate_irq(), is to program hardwares with preallocated
1419 * resources. In this way, it's easier to rollback when failing to
1420 * allocate resources.
1422 int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
1423 unsigned int nr_irqs, int node, void *arg,
1424 bool realloc, const struct irq_affinity_desc *affinity)
1428 if (domain == NULL) {
1429 domain = irq_default_domain;
1430 if (WARN(!domain, "domain is NULL; cannot allocate IRQ\n"))
1434 if (realloc && irq_base >= 0) {
1437 virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node,
1440 pr_debug("cannot allocate IRQ(base %d, count %d)\n",
1446 if (irq_domain_alloc_irq_data(domain, virq, nr_irqs)) {
1447 pr_debug("cannot allocate memory for IRQ%d\n", virq);
1452 mutex_lock(&irq_domain_mutex);
1453 ret = irq_domain_alloc_irqs_hierarchy(domain, virq, nr_irqs, arg);
1455 mutex_unlock(&irq_domain_mutex);
1456 goto out_free_irq_data;
1459 for (i = 0; i < nr_irqs; i++) {
1460 ret = irq_domain_trim_hierarchy(virq + i);
1462 mutex_unlock(&irq_domain_mutex);
1463 goto out_free_irq_data;
1467 for (i = 0; i < nr_irqs; i++)
1468 irq_domain_insert_irq(virq + i);
1469 mutex_unlock(&irq_domain_mutex);
1474 irq_domain_free_irq_data(virq, nr_irqs);
1476 irq_free_descs(virq, nr_irqs);
1480 /* The irq_data was moved, fix the revmap to refer to the new location */
1481 static void irq_domain_fix_revmap(struct irq_data *d)
1485 if (d->hwirq < d->domain->revmap_size)
1486 return; /* Not using radix tree. */
1488 /* Fix up the revmap. */
1489 mutex_lock(&d->domain->revmap_tree_mutex);
1490 slot = radix_tree_lookup_slot(&d->domain->revmap_tree, d->hwirq);
1492 radix_tree_replace_slot(&d->domain->revmap_tree, slot, d);
1493 mutex_unlock(&d->domain->revmap_tree_mutex);
1497 * irq_domain_push_irq() - Push a domain in to the top of a hierarchy.
1498 * @domain: Domain to push.
1499 * @virq: Irq to push the domain in to.
1500 * @arg: Passed to the irq_domain_ops alloc() function.
1502 * For an already existing irqdomain hierarchy, as might be obtained
1503 * via a call to pci_enable_msix(), add an additional domain to the
1504 * head of the processing chain. Must be called before request_irq()
1507 int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg)
1509 struct irq_data *child_irq_data;
1510 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1511 struct irq_desc *desc;
1515 * Check that no action has been set, which indicates the virq
1516 * is in a state where this function doesn't have to deal with
1517 * races between interrupt handling and maintaining the
1518 * hierarchy. This will catch gross misuse. Attempting to
1519 * make the check race free would require holding locks across
1520 * calls to struct irq_domain_ops->alloc(), which could lead
1521 * to deadlock, so we just do a simple check before starting.
1523 desc = irq_to_desc(virq);
1526 if (WARN_ON(desc->action))
1532 if (WARN_ON(!irq_domain_is_hierarchy(domain)))
1538 if (domain->parent != root_irq_data->domain)
1541 child_irq_data = kzalloc_node(sizeof(*child_irq_data), GFP_KERNEL,
1542 irq_data_get_node(root_irq_data));
1543 if (!child_irq_data)
1546 mutex_lock(&irq_domain_mutex);
1548 /* Copy the original irq_data. */
1549 *child_irq_data = *root_irq_data;
1552 * Overwrite the root_irq_data, which is embedded in struct
1553 * irq_desc, with values for this domain.
1555 root_irq_data->parent_data = child_irq_data;
1556 root_irq_data->domain = domain;
1557 root_irq_data->mask = 0;
1558 root_irq_data->hwirq = 0;
1559 root_irq_data->chip = NULL;
1560 root_irq_data->chip_data = NULL;
1562 /* May (probably does) set hwirq, chip, etc. */
1563 rv = irq_domain_alloc_irqs_hierarchy(domain, virq, 1, arg);
1565 /* Restore the original irq_data. */
1566 *root_irq_data = *child_irq_data;
1567 kfree(child_irq_data);
1571 irq_domain_fix_revmap(child_irq_data);
1572 irq_domain_set_mapping(domain, root_irq_data->hwirq, root_irq_data);
1575 mutex_unlock(&irq_domain_mutex);
1579 EXPORT_SYMBOL_GPL(irq_domain_push_irq);
1582 * irq_domain_pop_irq() - Remove a domain from the top of a hierarchy.
1583 * @domain: Domain to remove.
1584 * @virq: Irq to remove the domain from.
1586 * Undo the effects of a call to irq_domain_push_irq(). Must be
1587 * called either before request_irq() or after free_irq().
1589 int irq_domain_pop_irq(struct irq_domain *domain, int virq)
1591 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1592 struct irq_data *child_irq_data;
1593 struct irq_data *tmp_irq_data;
1594 struct irq_desc *desc;
1597 * Check that no action is set, which indicates the virq is in
1598 * a state where this function doesn't have to deal with races
1599 * between interrupt handling and maintaining the hierarchy.
1600 * This will catch gross misuse. Attempting to make the check
1601 * race free would require holding locks across calls to
1602 * struct irq_domain_ops->free(), which could lead to
1603 * deadlock, so we just do a simple check before starting.
1605 desc = irq_to_desc(virq);
1608 if (WARN_ON(desc->action))
1617 tmp_irq_data = irq_domain_get_irq_data(domain, virq);
1619 /* We can only "pop" if this domain is at the top of the list */
1620 if (WARN_ON(root_irq_data != tmp_irq_data))
1623 if (WARN_ON(root_irq_data->domain != domain))
1626 child_irq_data = root_irq_data->parent_data;
1627 if (WARN_ON(!child_irq_data))
1630 mutex_lock(&irq_domain_mutex);
1632 root_irq_data->parent_data = NULL;
1634 irq_domain_clear_mapping(domain, root_irq_data->hwirq);
1635 irq_domain_free_irqs_hierarchy(domain, virq, 1);
1637 /* Restore the original irq_data. */
1638 *root_irq_data = *child_irq_data;
1640 irq_domain_fix_revmap(root_irq_data);
1642 mutex_unlock(&irq_domain_mutex);
1644 kfree(child_irq_data);
1648 EXPORT_SYMBOL_GPL(irq_domain_pop_irq);
1651 * irq_domain_free_irqs - Free IRQ number and associated data structures
1652 * @virq: base IRQ number
1653 * @nr_irqs: number of IRQs to free
1655 void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs)
1657 struct irq_data *data = irq_get_irq_data(virq);
1660 if (WARN(!data || !data->domain || !data->domain->ops->free,
1661 "NULL pointer, cannot free irq\n"))
1664 mutex_lock(&irq_domain_mutex);
1665 for (i = 0; i < nr_irqs; i++)
1666 irq_domain_remove_irq(virq + i);
1667 irq_domain_free_irqs_hierarchy(data->domain, virq, nr_irqs);
1668 mutex_unlock(&irq_domain_mutex);
1670 irq_domain_free_irq_data(virq, nr_irqs);
1671 irq_free_descs(virq, nr_irqs);
1675 * irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain
1676 * @irq_base: Base IRQ number
1677 * @nr_irqs: Number of IRQs to allocate
1678 * @arg: Allocation data (arch/domain specific)
1680 * Check whether the domain has been setup recursive. If not allocate
1681 * through the parent domain.
1683 int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
1684 unsigned int irq_base, unsigned int nr_irqs,
1687 if (!domain->parent)
1690 return irq_domain_alloc_irqs_hierarchy(domain->parent, irq_base,
1693 EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent);
1696 * irq_domain_free_irqs_parent - Free interrupts from parent domain
1697 * @irq_base: Base IRQ number
1698 * @nr_irqs: Number of IRQs to free
1700 * Check whether the domain has been setup recursive. If not free
1701 * through the parent domain.
1703 void irq_domain_free_irqs_parent(struct irq_domain *domain,
1704 unsigned int irq_base, unsigned int nr_irqs)
1706 if (!domain->parent)
1709 irq_domain_free_irqs_hierarchy(domain->parent, irq_base, nr_irqs);
1711 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent);
1713 static void __irq_domain_deactivate_irq(struct irq_data *irq_data)
1715 if (irq_data && irq_data->domain) {
1716 struct irq_domain *domain = irq_data->domain;
1718 if (domain->ops->deactivate)
1719 domain->ops->deactivate(domain, irq_data);
1720 if (irq_data->parent_data)
1721 __irq_domain_deactivate_irq(irq_data->parent_data);
1725 static int __irq_domain_activate_irq(struct irq_data *irqd, bool reserve)
1729 if (irqd && irqd->domain) {
1730 struct irq_domain *domain = irqd->domain;
1732 if (irqd->parent_data)
1733 ret = __irq_domain_activate_irq(irqd->parent_data,
1735 if (!ret && domain->ops->activate) {
1736 ret = domain->ops->activate(domain, irqd, reserve);
1737 /* Rollback in case of error */
1738 if (ret && irqd->parent_data)
1739 __irq_domain_deactivate_irq(irqd->parent_data);
1746 * irq_domain_activate_irq - Call domain_ops->activate recursively to activate
1748 * @irq_data: Outermost irq_data associated with interrupt
1749 * @reserve: If set only reserve an interrupt vector instead of assigning one
1751 * This is the second step to call domain_ops->activate to program interrupt
1752 * controllers, so the interrupt could actually get delivered.
1754 int irq_domain_activate_irq(struct irq_data *irq_data, bool reserve)
1758 if (!irqd_is_activated(irq_data))
1759 ret = __irq_domain_activate_irq(irq_data, reserve);
1761 irqd_set_activated(irq_data);
1766 * irq_domain_deactivate_irq - Call domain_ops->deactivate recursively to
1767 * deactivate interrupt
1768 * @irq_data: outermost irq_data associated with interrupt
1770 * It calls domain_ops->deactivate to program interrupt controllers to disable
1771 * interrupt delivery.
1773 void irq_domain_deactivate_irq(struct irq_data *irq_data)
1775 if (irqd_is_activated(irq_data)) {
1776 __irq_domain_deactivate_irq(irq_data);
1777 irqd_clr_activated(irq_data);
1781 static void irq_domain_check_hierarchy(struct irq_domain *domain)
1783 /* Hierarchy irq_domains must implement callback alloc() */
1784 if (domain->ops->alloc)
1785 domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY;
1789 * irq_domain_hierarchical_is_msi_remap - Check if the domain or any
1790 * parent has MSI remapping support
1791 * @domain: domain pointer
1793 bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain)
1795 for (; domain; domain = domain->parent) {
1796 if (irq_domain_is_msi_remap(domain))
1801 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1803 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1804 * @domain: domain to match
1805 * @virq: IRQ number to get irq_data
1807 struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1810 struct irq_data *irq_data = irq_get_irq_data(virq);
1812 return (irq_data && irq_data->domain == domain) ? irq_data : NULL;
1814 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1817 * irq_domain_set_info - Set the complete data for a @virq in @domain
1818 * @domain: Interrupt domain to match
1820 * @hwirq: The hardware interrupt number
1821 * @chip: The associated interrupt chip
1822 * @chip_data: The associated interrupt chip data
1823 * @handler: The interrupt flow handler
1824 * @handler_data: The interrupt flow handler data
1825 * @handler_name: The interrupt handler name
1827 void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1828 irq_hw_number_t hwirq, struct irq_chip *chip,
1829 void *chip_data, irq_flow_handler_t handler,
1830 void *handler_data, const char *handler_name)
1832 irq_set_chip_and_handler_name(virq, chip, handler, handler_name);
1833 irq_set_chip_data(virq, chip_data);
1834 irq_set_handler_data(virq, handler_data);
1837 static void irq_domain_check_hierarchy(struct irq_domain *domain)
1840 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1842 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
1843 static struct dentry *domain_dir;
1846 irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind)
1848 seq_printf(m, "%*sname: %s\n", ind, "", d->name);
1849 seq_printf(m, "%*ssize: %u\n", ind + 1, "",
1850 d->revmap_size + d->revmap_direct_max_irq);
1851 seq_printf(m, "%*smapped: %u\n", ind + 1, "", d->mapcount);
1852 seq_printf(m, "%*sflags: 0x%08x\n", ind +1 , "", d->flags);
1853 if (d->ops && d->ops->debug_show)
1854 d->ops->debug_show(m, d, NULL, ind + 1);
1855 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1858 seq_printf(m, "%*sparent: %s\n", ind + 1, "", d->parent->name);
1859 irq_domain_debug_show_one(m, d->parent, ind + 4);
1863 static int irq_domain_debug_show(struct seq_file *m, void *p)
1865 struct irq_domain *d = m->private;
1867 /* Default domain? Might be NULL */
1869 if (!irq_default_domain)
1871 d = irq_default_domain;
1873 irq_domain_debug_show_one(m, d, 0);
1876 DEFINE_SHOW_ATTRIBUTE(irq_domain_debug);
1878 static void debugfs_add_domain_dir(struct irq_domain *d)
1880 if (!d->name || !domain_dir || d->debugfs_file)
1882 d->debugfs_file = debugfs_create_file(d->name, 0444, domain_dir, d,
1883 &irq_domain_debug_fops);
1886 static void debugfs_remove_domain_dir(struct irq_domain *d)
1888 debugfs_remove(d->debugfs_file);
1889 d->debugfs_file = NULL;
1892 void __init irq_domain_debugfs_init(struct dentry *root)
1894 struct irq_domain *d;
1896 domain_dir = debugfs_create_dir("domains", root);
1898 debugfs_create_file("default", 0444, domain_dir, NULL,
1899 &irq_domain_debug_fops);
1900 mutex_lock(&irq_domain_mutex);
1901 list_for_each_entry(d, &irq_domain_list, link)
1902 debugfs_add_domain_dir(d);
1903 mutex_unlock(&irq_domain_mutex);