1 #define pr_fmt(fmt) "irq: " fmt
3 #include <linux/debugfs.h>
4 #include <linux/hardirq.h>
5 #include <linux/interrupt.h>
7 #include <linux/irqdesc.h>
8 #include <linux/irqdomain.h>
9 #include <linux/module.h>
10 #include <linux/mutex.h>
12 #include <linux/of_address.h>
13 #include <linux/topology.h>
14 #include <linux/seq_file.h>
15 #include <linux/slab.h>
16 #include <linux/smp.h>
19 #define IRQ_DOMAIN_MAP_LEGACY 0 /* driver allocated fixed range of irqs.
20 * ie. legacy 8259, gets irqs 1..15 */
21 #define IRQ_DOMAIN_MAP_NOMAP 1 /* no fast reverse mapping */
22 #define IRQ_DOMAIN_MAP_LINEAR 2 /* linear map of interrupts */
23 #define IRQ_DOMAIN_MAP_TREE 3 /* radix tree */
25 static LIST_HEAD(irq_domain_list);
26 static DEFINE_MUTEX(irq_domain_mutex);
28 static DEFINE_MUTEX(revmap_trees_mutex);
29 static struct irq_domain *irq_default_domain;
32 * irq_domain_alloc() - Allocate a new irq_domain data structure
33 * @of_node: optional device-tree node of the interrupt controller
34 * @revmap_type: type of reverse mapping to use
35 * @ops: map/unmap domain callbacks
36 * @host_data: Controller private data pointer
38 * Allocates and initialize and irq_domain structure. Caller is expected to
39 * register allocated irq_domain with irq_domain_register(). Returns pointer
40 * to IRQ domain, or NULL on failure.
42 static struct irq_domain *irq_domain_alloc(struct device_node *of_node,
43 unsigned int revmap_type,
44 const struct irq_domain_ops *ops,
47 struct irq_domain *domain;
49 domain = kzalloc_node(sizeof(*domain), GFP_KERNEL,
50 of_node_to_nid(of_node));
55 domain->revmap_type = revmap_type;
57 domain->host_data = host_data;
58 domain->of_node = of_node_get(of_node);
63 static void irq_domain_free(struct irq_domain *domain)
65 of_node_put(domain->of_node);
69 static void irq_domain_add(struct irq_domain *domain)
71 mutex_lock(&irq_domain_mutex);
72 list_add(&domain->link, &irq_domain_list);
73 mutex_unlock(&irq_domain_mutex);
74 pr_debug("Allocated domain of type %d @0x%p\n",
75 domain->revmap_type, domain);
79 * irq_domain_remove() - Remove an irq domain.
80 * @domain: domain to remove
82 * This routine is used to remove an irq domain. The caller must ensure
83 * that all mappings within the domain have been disposed of prior to
84 * use, depending on the revmap type.
86 void irq_domain_remove(struct irq_domain *domain)
88 mutex_lock(&irq_domain_mutex);
90 switch (domain->revmap_type) {
91 case IRQ_DOMAIN_MAP_LEGACY:
93 * Legacy domains don't manage their own irq_desc
94 * allocations, we expect the caller to handle irq_desc
95 * freeing on their own.
98 case IRQ_DOMAIN_MAP_TREE:
100 * radix_tree_delete() takes care of destroying the root
101 * node when all entries are removed. Shout if there are
104 WARN_ON(domain->revmap_data.tree.height);
106 case IRQ_DOMAIN_MAP_LINEAR:
107 kfree(domain->revmap_data.linear.revmap);
108 domain->revmap_data.linear.size = 0;
110 case IRQ_DOMAIN_MAP_NOMAP:
114 list_del(&domain->link);
117 * If the going away domain is the default one, reset it.
119 if (unlikely(irq_default_domain == domain))
120 irq_set_default_host(NULL);
122 mutex_unlock(&irq_domain_mutex);
124 pr_debug("Removed domain of type %d @0x%p\n",
125 domain->revmap_type, domain);
127 irq_domain_free(domain);
129 EXPORT_SYMBOL_GPL(irq_domain_remove);
131 static unsigned int irq_domain_legacy_revmap(struct irq_domain *domain,
132 irq_hw_number_t hwirq)
134 irq_hw_number_t first_hwirq = domain->revmap_data.legacy.first_hwirq;
135 int size = domain->revmap_data.legacy.size;
137 if (WARN_ON(hwirq < first_hwirq || hwirq >= first_hwirq + size))
139 return hwirq - first_hwirq + domain->revmap_data.legacy.first_irq;
143 * irq_domain_add_simple() - Allocate and register a simple irq_domain.
144 * @of_node: pointer to interrupt controller's device tree node.
145 * @size: total number of irqs in mapping
146 * @first_irq: first number of irq block assigned to the domain
147 * @ops: map/unmap domain callbacks
148 * @host_data: Controller private data pointer
150 * Allocates a legacy irq_domain if irq_base is positive or a linear
151 * domain otherwise. For the legacy domain, IRQ descriptors will also
154 * This is intended to implement the expected behaviour for most
155 * interrupt controllers which is that a linear mapping should
156 * normally be used unless the system requires a legacy mapping in
157 * order to support supplying interrupt numbers during non-DT
158 * registration of devices.
160 struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
162 unsigned int first_irq,
163 const struct irq_domain_ops *ops,
169 if (IS_ENABLED(CONFIG_SPARSE_IRQ)) {
171 * Set the descriptor allocator to search for a
172 * 1-to-1 mapping, such as irq_alloc_desc_at().
173 * Use of_node_to_nid() which is defined to
174 * numa_node_id() on platforms that have no custom
177 irq_base = irq_alloc_descs(first_irq, first_irq, size,
178 of_node_to_nid(of_node));
180 pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
182 irq_base = first_irq;
185 irq_base = first_irq;
187 return irq_domain_add_legacy(of_node, size, irq_base, 0,
191 /* A linear domain is the default */
192 return irq_domain_add_linear(of_node, size, ops, host_data);
194 EXPORT_SYMBOL_GPL(irq_domain_add_simple);
197 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain.
198 * @of_node: pointer to interrupt controller's device tree node.
199 * @size: total number of irqs in legacy mapping
200 * @first_irq: first number of irq block assigned to the domain
201 * @first_hwirq: first hwirq number to use for the translation. Should normally
202 * be '0', but a positive integer can be used if the effective
203 * hwirqs numbering does not begin at zero.
204 * @ops: map/unmap domain callbacks
205 * @host_data: Controller private data pointer
207 * Note: the map() callback will be called before this function returns
208 * for all legacy interrupts except 0 (which is always the invalid irq for
209 * a legacy controller).
211 struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
213 unsigned int first_irq,
214 irq_hw_number_t first_hwirq,
215 const struct irq_domain_ops *ops,
218 struct irq_domain *domain;
221 domain = irq_domain_alloc(of_node, IRQ_DOMAIN_MAP_LEGACY, ops, host_data);
225 domain->revmap_data.legacy.first_irq = first_irq;
226 domain->revmap_data.legacy.first_hwirq = first_hwirq;
227 domain->revmap_data.legacy.size = size;
229 mutex_lock(&irq_domain_mutex);
230 /* Verify that all the irqs are available */
231 for (i = 0; i < size; i++) {
232 int irq = first_irq + i;
233 struct irq_data *irq_data = irq_get_irq_data(irq);
235 if (WARN_ON(!irq_data || irq_data->domain)) {
236 mutex_unlock(&irq_domain_mutex);
237 irq_domain_free(domain);
242 /* Claim all of the irqs before registering a legacy domain */
243 for (i = 0; i < size; i++) {
244 struct irq_data *irq_data = irq_get_irq_data(first_irq + i);
245 irq_data->hwirq = first_hwirq + i;
246 irq_data->domain = domain;
248 mutex_unlock(&irq_domain_mutex);
250 for (i = 0; i < size; i++) {
251 int irq = first_irq + i;
252 int hwirq = first_hwirq + i;
254 /* IRQ0 gets ignored */
258 /* Legacy flags are left to default at this point,
259 * one can then use irq_create_mapping() to
260 * explicitly change them
263 ops->map(domain, irq, hwirq);
265 /* Clear norequest flags */
266 irq_clear_status_flags(irq, IRQ_NOREQUEST);
269 irq_domain_add(domain);
272 EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
275 * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain.
276 * @of_node: pointer to interrupt controller's device tree node.
277 * @size: Number of interrupts in the domain.
278 * @ops: map/unmap domain callbacks
279 * @host_data: Controller private data pointer
281 struct irq_domain *irq_domain_add_linear(struct device_node *of_node,
283 const struct irq_domain_ops *ops,
286 struct irq_domain *domain;
287 unsigned int *revmap;
289 revmap = kzalloc_node(sizeof(*revmap) * size, GFP_KERNEL,
290 of_node_to_nid(of_node));
291 if (WARN_ON(!revmap))
294 domain = irq_domain_alloc(of_node, IRQ_DOMAIN_MAP_LINEAR, ops, host_data);
299 domain->revmap_data.linear.size = size;
300 domain->revmap_data.linear.revmap = revmap;
301 irq_domain_add(domain);
304 EXPORT_SYMBOL_GPL(irq_domain_add_linear);
306 struct irq_domain *irq_domain_add_nomap(struct device_node *of_node,
307 unsigned int max_irq,
308 const struct irq_domain_ops *ops,
311 struct irq_domain *domain = irq_domain_alloc(of_node,
312 IRQ_DOMAIN_MAP_NOMAP, ops, host_data);
314 domain->revmap_data.nomap.max_irq = max_irq ? max_irq : ~0;
315 irq_domain_add(domain);
319 EXPORT_SYMBOL_GPL(irq_domain_add_nomap);
322 * irq_domain_add_tree()
323 * @of_node: pointer to interrupt controller's device tree node.
324 * @ops: map/unmap domain callbacks
326 * Note: The radix tree will be allocated later during boot automatically
327 * (the reverse mapping will use the slow path until that happens).
329 struct irq_domain *irq_domain_add_tree(struct device_node *of_node,
330 const struct irq_domain_ops *ops,
333 struct irq_domain *domain = irq_domain_alloc(of_node,
334 IRQ_DOMAIN_MAP_TREE, ops, host_data);
336 INIT_RADIX_TREE(&domain->revmap_data.tree, GFP_KERNEL);
337 irq_domain_add(domain);
341 EXPORT_SYMBOL_GPL(irq_domain_add_tree);
344 * irq_find_host() - Locates a domain for a given device node
345 * @node: device-tree node of the interrupt controller
347 struct irq_domain *irq_find_host(struct device_node *node)
349 struct irq_domain *h, *found = NULL;
352 /* We might want to match the legacy controller last since
353 * it might potentially be set to match all interrupts in
354 * the absence of a device node. This isn't a problem so far
357 mutex_lock(&irq_domain_mutex);
358 list_for_each_entry(h, &irq_domain_list, link) {
360 rc = h->ops->match(h, node);
362 rc = (h->of_node != NULL) && (h->of_node == node);
369 mutex_unlock(&irq_domain_mutex);
372 EXPORT_SYMBOL_GPL(irq_find_host);
375 * irq_set_default_host() - Set a "default" irq domain
376 * @domain: default domain pointer
378 * For convenience, it's possible to set a "default" domain that will be used
379 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
380 * platforms that want to manipulate a few hard coded interrupt numbers that
381 * aren't properly represented in the device-tree.
383 void irq_set_default_host(struct irq_domain *domain)
385 pr_debug("Default domain set to @0x%p\n", domain);
387 irq_default_domain = domain;
389 EXPORT_SYMBOL_GPL(irq_set_default_host);
391 static void irq_domain_disassociate_many(struct irq_domain *domain,
392 unsigned int irq_base, int count)
395 * disassociate in reverse order;
396 * not strictly necessary, but nice for unwinding
399 int irq = irq_base + count;
400 struct irq_data *irq_data = irq_get_irq_data(irq);
401 irq_hw_number_t hwirq = irq_data->hwirq;
403 if (WARN_ON(!irq_data || irq_data->domain != domain))
406 irq_set_status_flags(irq, IRQ_NOREQUEST);
408 /* remove chip and handler */
409 irq_set_chip_and_handler(irq, NULL, NULL);
411 /* Make sure it's completed */
412 synchronize_irq(irq);
414 /* Tell the PIC about it */
415 if (domain->ops->unmap)
416 domain->ops->unmap(domain, irq);
419 irq_data->domain = NULL;
422 /* Clear reverse map */
423 switch(domain->revmap_type) {
424 case IRQ_DOMAIN_MAP_LINEAR:
425 if (hwirq < domain->revmap_data.linear.size)
426 domain->revmap_data.linear.revmap[hwirq] = 0;
428 case IRQ_DOMAIN_MAP_TREE:
429 mutex_lock(&revmap_trees_mutex);
430 radix_tree_delete(&domain->revmap_data.tree, hwirq);
431 mutex_unlock(&revmap_trees_mutex);
437 int irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
438 irq_hw_number_t hwirq_base, int count)
440 unsigned int virq = irq_base;
441 irq_hw_number_t hwirq = hwirq_base;
444 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
445 of_node_full_name(domain->of_node), irq_base, (int)hwirq_base, count);
447 for (i = 0; i < count; i++) {
448 struct irq_data *irq_data = irq_get_irq_data(virq + i);
450 if (WARN(!irq_data, "error: irq_desc not allocated; "
451 "irq=%i hwirq=0x%x\n", virq + i, (int)hwirq + i))
453 if (WARN(irq_data->domain, "error: irq_desc already associated; "
454 "irq=%i hwirq=0x%x\n", virq + i, (int)hwirq + i))
458 for (i = 0; i < count; i++, virq++, hwirq++) {
459 struct irq_data *irq_data = irq_get_irq_data(virq);
461 irq_data->hwirq = hwirq;
462 irq_data->domain = domain;
463 if (domain->ops->map) {
464 ret = domain->ops->map(domain, virq, hwirq);
467 * If map() returns -EPERM, this interrupt is protected
468 * by the firmware or some other service and shall not
471 * Since on some platforms we blindly try to map everything
472 * we end up with a log full of backtraces.
474 * So instead, we silently fail on -EPERM, it is the
475 * responsibility of the PIC driver to display a relevant
479 pr_err("irq-%i==>hwirq-0x%lx mapping failed: %d\n",
483 irq_data->domain = NULL;
489 switch (domain->revmap_type) {
490 case IRQ_DOMAIN_MAP_LINEAR:
491 if (hwirq < domain->revmap_data.linear.size)
492 domain->revmap_data.linear.revmap[hwirq] = virq;
494 case IRQ_DOMAIN_MAP_TREE:
495 mutex_lock(&revmap_trees_mutex);
496 radix_tree_insert(&domain->revmap_data.tree, hwirq, irq_data);
497 mutex_unlock(&revmap_trees_mutex);
501 irq_clear_status_flags(virq, IRQ_NOREQUEST);
507 irq_domain_disassociate_many(domain, irq_base, i);
510 EXPORT_SYMBOL_GPL(irq_domain_associate_many);
513 * irq_create_direct_mapping() - Allocate an irq for direct mapping
514 * @domain: domain to allocate the irq for or NULL for default domain
516 * This routine is used for irq controllers which can choose the hardware
517 * interrupt numbers they generate. In such a case it's simplest to use
518 * the linux irq as the hardware interrupt number.
520 unsigned int irq_create_direct_mapping(struct irq_domain *domain)
525 domain = irq_default_domain;
527 if (WARN_ON(!domain || domain->revmap_type != IRQ_DOMAIN_MAP_NOMAP))
530 virq = irq_alloc_desc_from(1, of_node_to_nid(domain->of_node));
532 pr_debug("create_direct virq allocation failed\n");
535 if (virq >= domain->revmap_data.nomap.max_irq) {
536 pr_err("ERROR: no free irqs available below %i maximum\n",
537 domain->revmap_data.nomap.max_irq);
541 pr_debug("create_direct obtained virq %d\n", virq);
543 if (irq_domain_associate(domain, virq, virq)) {
550 EXPORT_SYMBOL_GPL(irq_create_direct_mapping);
553 * irq_create_mapping() - Map a hardware interrupt into linux irq space
554 * @domain: domain owning this hardware interrupt or NULL for default domain
555 * @hwirq: hardware irq number in that domain space
557 * Only one mapping per hardware interrupt is permitted. Returns a linux
559 * If the sense/trigger is to be specified, set_irq_type() should be called
560 * on the number returned from that call.
562 unsigned int irq_create_mapping(struct irq_domain *domain,
563 irq_hw_number_t hwirq)
568 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
570 /* Look for default domain if nececssary */
572 domain = irq_default_domain;
573 if (domain == NULL) {
574 pr_warning("irq_create_mapping called for"
575 " NULL domain, hwirq=%lx\n", hwirq);
579 pr_debug("-> using domain @%p\n", domain);
581 /* Check if mapping already exists */
582 virq = irq_find_mapping(domain, hwirq);
584 pr_debug("-> existing mapping on virq %d\n", virq);
588 /* Get a virtual interrupt number */
589 if (domain->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
590 return irq_domain_legacy_revmap(domain, hwirq);
592 /* Allocate a virtual interrupt number */
593 hint = hwirq % nr_irqs;
596 virq = irq_alloc_desc_from(hint, of_node_to_nid(domain->of_node));
598 virq = irq_alloc_desc_from(1, of_node_to_nid(domain->of_node));
600 pr_debug("-> virq allocation failed\n");
604 if (irq_domain_associate(domain, virq, hwirq)) {
609 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
610 hwirq, of_node_full_name(domain->of_node), virq);
614 EXPORT_SYMBOL_GPL(irq_create_mapping);
617 * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs
618 * @domain: domain owning the interrupt range
619 * @irq_base: beginning of linux IRQ range
620 * @hwirq_base: beginning of hardware IRQ range
621 * @count: Number of interrupts to map
623 * This routine is used for allocating and mapping a range of hardware
624 * irqs to linux irqs where the linux irq numbers are at pre-defined
625 * locations. For use by controllers that already have static mappings
626 * to insert in to the domain.
628 * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time
631 * 0 is returned upon success, while any failure to establish a static
632 * mapping is treated as an error.
634 int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base,
635 irq_hw_number_t hwirq_base, int count)
639 ret = irq_alloc_descs(irq_base, irq_base, count,
640 of_node_to_nid(domain->of_node));
641 if (unlikely(ret < 0))
644 ret = irq_domain_associate_many(domain, irq_base, hwirq_base, count);
645 if (unlikely(ret < 0)) {
646 irq_free_descs(irq_base, count);
652 EXPORT_SYMBOL_GPL(irq_create_strict_mappings);
654 unsigned int irq_create_of_mapping(struct device_node *controller,
655 const u32 *intspec, unsigned int intsize)
657 struct irq_domain *domain;
658 irq_hw_number_t hwirq;
659 unsigned int type = IRQ_TYPE_NONE;
662 domain = controller ? irq_find_host(controller) : irq_default_domain;
666 * Workaround to avoid breaking interrupt controller drivers
667 * that don't yet register an irq_domain. This is temporary
668 * code. ~~~gcl, Feb 24, 2012
670 * Scheduled for removal in Linux v3.6. That should be enough
676 pr_warning("no irq domain found for %s !\n",
677 of_node_full_name(controller));
681 /* If domain has no translation, then we assume interrupt line */
682 if (domain->ops->xlate == NULL)
685 if (domain->ops->xlate(domain, controller, intspec, intsize,
691 virq = irq_create_mapping(domain, hwirq);
695 /* Set type if specified and different than the current one */
696 if (type != IRQ_TYPE_NONE &&
697 type != (irqd_get_trigger_type(irq_get_irq_data(virq))))
698 irq_set_irq_type(virq, type);
701 EXPORT_SYMBOL_GPL(irq_create_of_mapping);
704 * irq_dispose_mapping() - Unmap an interrupt
705 * @virq: linux irq number of the interrupt to unmap
707 void irq_dispose_mapping(unsigned int virq)
709 struct irq_data *irq_data = irq_get_irq_data(virq);
710 struct irq_domain *domain;
712 if (!virq || !irq_data)
715 domain = irq_data->domain;
716 if (WARN_ON(domain == NULL))
719 /* Never unmap legacy interrupts */
720 if (domain->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
723 irq_domain_disassociate_many(domain, virq, 1);
726 EXPORT_SYMBOL_GPL(irq_dispose_mapping);
729 * irq_find_mapping() - Find a linux irq from an hw irq number.
730 * @domain: domain owning this hardware interrupt
731 * @hwirq: hardware irq number in that domain space
733 unsigned int irq_find_mapping(struct irq_domain *domain,
734 irq_hw_number_t hwirq)
736 struct irq_data *data;
738 /* Look for default domain if nececssary */
740 domain = irq_default_domain;
744 switch (domain->revmap_type) {
745 case IRQ_DOMAIN_MAP_LEGACY:
746 return irq_domain_legacy_revmap(domain, hwirq);
747 case IRQ_DOMAIN_MAP_LINEAR:
748 return irq_linear_revmap(domain, hwirq);
749 case IRQ_DOMAIN_MAP_TREE:
751 data = radix_tree_lookup(&domain->revmap_data.tree, hwirq);
756 case IRQ_DOMAIN_MAP_NOMAP:
757 data = irq_get_irq_data(hwirq);
758 if (data && (data->domain == domain) && (data->hwirq == hwirq))
765 EXPORT_SYMBOL_GPL(irq_find_mapping);
768 * irq_linear_revmap() - Find a linux irq from a hw irq number.
769 * @domain: domain owning this hardware interrupt
770 * @hwirq: hardware irq number in that domain space
772 * This is a fast path that can be called directly by irq controller code to
773 * save a handful of instructions.
775 unsigned int irq_linear_revmap(struct irq_domain *domain,
776 irq_hw_number_t hwirq)
778 BUG_ON(domain->revmap_type != IRQ_DOMAIN_MAP_LINEAR);
780 /* Check revmap bounds; complain if exceeded */
781 if (WARN_ON(hwirq >= domain->revmap_data.linear.size))
784 return domain->revmap_data.linear.revmap[hwirq];
786 EXPORT_SYMBOL_GPL(irq_linear_revmap);
788 #ifdef CONFIG_IRQ_DOMAIN_DEBUG
789 static int virq_debug_show(struct seq_file *m, void *private)
792 struct irq_desc *desc;
794 static const char none[] = "none";
798 seq_printf(m, "%-5s %-7s %-15s %-*s %s\n", "irq", "hwirq",
799 "chip name", (int)(2 * sizeof(void *) + 2), "chip data",
802 for (i = 1; i < nr_irqs; i++) {
803 desc = irq_to_desc(i);
807 raw_spin_lock_irqsave(&desc->lock, flags);
809 if (desc->action && desc->action->handler) {
810 struct irq_chip *chip;
812 seq_printf(m, "%5d ", i);
813 seq_printf(m, "0x%05lx ", desc->irq_data.hwirq);
815 chip = irq_desc_get_chip(desc);
816 if (chip && chip->name)
820 seq_printf(m, "%-15s ", p);
822 data = irq_desc_get_chip_data(desc);
823 seq_printf(m, data ? "0x%p " : " %p ", data);
825 if (desc->irq_data.domain)
826 p = of_node_full_name(desc->irq_data.domain->of_node);
829 seq_printf(m, "%s\n", p);
832 raw_spin_unlock_irqrestore(&desc->lock, flags);
838 static int virq_debug_open(struct inode *inode, struct file *file)
840 return single_open(file, virq_debug_show, inode->i_private);
843 static const struct file_operations virq_debug_fops = {
844 .open = virq_debug_open,
847 .release = single_release,
850 static int __init irq_debugfs_init(void)
852 if (debugfs_create_file("irq_domain_mapping", S_IRUGO, NULL,
853 NULL, &virq_debug_fops) == NULL)
858 __initcall(irq_debugfs_init);
859 #endif /* CONFIG_IRQ_DOMAIN_DEBUG */
862 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
864 * Device Tree IRQ specifier translation function which works with one cell
865 * bindings where the cell value maps directly to the hwirq number.
867 int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
868 const u32 *intspec, unsigned int intsize,
869 unsigned long *out_hwirq, unsigned int *out_type)
871 if (WARN_ON(intsize < 1))
873 *out_hwirq = intspec[0];
874 *out_type = IRQ_TYPE_NONE;
877 EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell);
880 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings
882 * Device Tree IRQ specifier translation function which works with two cell
883 * bindings where the cell values map directly to the hwirq number
884 * and linux irq flags.
886 int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
887 const u32 *intspec, unsigned int intsize,
888 irq_hw_number_t *out_hwirq, unsigned int *out_type)
890 if (WARN_ON(intsize < 2))
892 *out_hwirq = intspec[0];
893 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
896 EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell);
899 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings
901 * Device Tree IRQ specifier translation function which works with either one
902 * or two cell bindings where the cell values map directly to the hwirq number
903 * and linux irq flags.
905 * Note: don't use this function unless your interrupt controller explicitly
906 * supports both one and two cell bindings. For the majority of controllers
907 * the _onecell() or _twocell() variants above should be used.
909 int irq_domain_xlate_onetwocell(struct irq_domain *d,
910 struct device_node *ctrlr,
911 const u32 *intspec, unsigned int intsize,
912 unsigned long *out_hwirq, unsigned int *out_type)
914 if (WARN_ON(intsize < 1))
916 *out_hwirq = intspec[0];
917 *out_type = (intsize > 1) ? intspec[1] : IRQ_TYPE_NONE;
920 EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell);
922 const struct irq_domain_ops irq_domain_simple_ops = {
923 .xlate = irq_domain_xlate_onetwocell,
925 EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
928 void irq_domain_generate_simple(const struct of_device_id *match,
929 u64 phys_base, unsigned int irq_start)
931 struct device_node *node;
932 pr_debug("looking for phys_base=%llx, irq_start=%i\n",
933 (unsigned long long) phys_base, (int) irq_start);
934 node = of_find_matching_node_by_address(NULL, match, phys_base);
936 irq_domain_add_legacy(node, 32, irq_start, 0,
937 &irq_domain_simple_ops, NULL);
939 EXPORT_SYMBOL_GPL(irq_domain_generate_simple);