1
2
3#define pr_fmt(fmt) "irq: " fmt
4
5#include <linux/acpi.h>
6#include <linux/debugfs.h>
7#include <linux/hardirq.h>
8#include <linux/interrupt.h>
9#include <linux/irq.h>
10#include <linux/irqdesc.h>
11#include <linux/irqdomain.h>
12#include <linux/module.h>
13#include <linux/mutex.h>
14#include <linux/of.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>
21#include <linux/fs.h>
22
23static LIST_HEAD(irq_domain_list);
24static DEFINE_MUTEX(irq_domain_mutex);
25
26static struct irq_domain *irq_default_domain;
27
28static void irq_domain_check_hierarchy(struct irq_domain *domain);
29
30struct irqchip_fwid {
31 struct fwnode_handle fwnode;
32 unsigned int type;
33 char *name;
34 phys_addr_t *pa;
35};
36
37#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
38static void debugfs_add_domain_dir(struct irq_domain *d);
39static void debugfs_remove_domain_dir(struct irq_domain *d);
40#else
41static inline void debugfs_add_domain_dir(struct irq_domain *d) { }
42static inline void debugfs_remove_domain_dir(struct irq_domain *d) { }
43#endif
44
45static const char *irqchip_fwnode_get_name(const struct fwnode_handle *fwnode)
46{
47 struct irqchip_fwid *fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
48
49 return fwid->name;
50}
51
52const struct fwnode_operations irqchip_fwnode_ops = {
53 .get_name = irqchip_fwnode_get_name,
54};
55EXPORT_SYMBOL_GPL(irqchip_fwnode_ops);
56
57
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71
72
73struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
74 const char *name,
75 phys_addr_t *pa)
76{
77 struct irqchip_fwid *fwid;
78 char *n;
79
80 fwid = kzalloc(sizeof(*fwid), GFP_KERNEL);
81
82 switch (type) {
83 case IRQCHIP_FWNODE_NAMED:
84 n = kasprintf(GFP_KERNEL, "%s", name);
85 break;
86 case IRQCHIP_FWNODE_NAMED_ID:
87 n = kasprintf(GFP_KERNEL, "%s-%d", name, id);
88 break;
89 default:
90 n = kasprintf(GFP_KERNEL, "irqchip@%pa", pa);
91 break;
92 }
93
94 if (!fwid || !n) {
95 kfree(fwid);
96 kfree(n);
97 return NULL;
98 }
99
100 fwid->type = type;
101 fwid->name = n;
102 fwid->pa = pa;
103 fwnode_init(&fwid->fwnode, &irqchip_fwnode_ops);
104 return &fwid->fwnode;
105}
106EXPORT_SYMBOL_GPL(__irq_domain_alloc_fwnode);
107
108
109
110
111
112
113void irq_domain_free_fwnode(struct fwnode_handle *fwnode)
114{
115 struct irqchip_fwid *fwid;
116
117 if (WARN_ON(!is_fwnode_irqchip(fwnode)))
118 return;
119
120 fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
121 kfree(fwid->name);
122 kfree(fwid);
123}
124EXPORT_SYMBOL_GPL(irq_domain_free_fwnode);
125
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137
138
139struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, unsigned int size,
140 irq_hw_number_t hwirq_max, int direct_max,
141 const struct irq_domain_ops *ops,
142 void *host_data)
143{
144 struct irqchip_fwid *fwid;
145 struct irq_domain *domain;
146
147 static atomic_t unknown_domains;
148
149 if (WARN_ON((size && direct_max) ||
150 (!IS_ENABLED(CONFIG_IRQ_DOMAIN_NOMAP) && direct_max)))
151 return NULL;
152
153 domain = kzalloc_node(struct_size(domain, revmap, size),
154 GFP_KERNEL, of_node_to_nid(to_of_node(fwnode)));
155 if (!domain)
156 return NULL;
157
158 if (is_fwnode_irqchip(fwnode)) {
159 fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
160
161 switch (fwid->type) {
162 case IRQCHIP_FWNODE_NAMED:
163 case IRQCHIP_FWNODE_NAMED_ID:
164 domain->fwnode = fwnode;
165 domain->name = kstrdup(fwid->name, GFP_KERNEL);
166 if (!domain->name) {
167 kfree(domain);
168 return NULL;
169 }
170 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
171 break;
172 default:
173 domain->fwnode = fwnode;
174 domain->name = fwid->name;
175 break;
176 }
177 } else if (is_of_node(fwnode) || is_acpi_device_node(fwnode) ||
178 is_software_node(fwnode)) {
179 char *name;
180
181
182
183
184
185
186 name = kasprintf(GFP_KERNEL, "%pfw", fwnode);
187 if (!name) {
188 kfree(domain);
189 return NULL;
190 }
191
192 strreplace(name, '/', ':');
193
194 domain->name = name;
195 domain->fwnode = fwnode;
196 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
197 }
198
199 if (!domain->name) {
200 if (fwnode)
201 pr_err("Invalid fwnode type for irqdomain\n");
202 domain->name = kasprintf(GFP_KERNEL, "unknown-%d",
203 atomic_inc_return(&unknown_domains));
204 if (!domain->name) {
205 kfree(domain);
206 return NULL;
207 }
208 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
209 }
210
211 fwnode_handle_get(fwnode);
212 fwnode_dev_initialized(fwnode, true);
213
214
215 INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
216 mutex_init(&domain->revmap_mutex);
217 domain->ops = ops;
218 domain->host_data = host_data;
219 domain->hwirq_max = hwirq_max;
220
221 if (direct_max) {
222 size = direct_max;
223 domain->flags |= IRQ_DOMAIN_FLAG_NO_MAP;
224 }
225
226 domain->revmap_size = size;
227
228 irq_domain_check_hierarchy(domain);
229
230 mutex_lock(&irq_domain_mutex);
231 debugfs_add_domain_dir(domain);
232 list_add(&domain->link, &irq_domain_list);
233 mutex_unlock(&irq_domain_mutex);
234
235 pr_debug("Added domain %s\n", domain->name);
236 return domain;
237}
238EXPORT_SYMBOL_GPL(__irq_domain_add);
239
240
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242
243
244
245
246
247
248void irq_domain_remove(struct irq_domain *domain)
249{
250 mutex_lock(&irq_domain_mutex);
251 debugfs_remove_domain_dir(domain);
252
253 WARN_ON(!radix_tree_empty(&domain->revmap_tree));
254
255 list_del(&domain->link);
256
257
258
259
260 if (unlikely(irq_default_domain == domain))
261 irq_set_default_host(NULL);
262
263 mutex_unlock(&irq_domain_mutex);
264
265 pr_debug("Removed domain %s\n", domain->name);
266
267 fwnode_dev_initialized(domain->fwnode, false);
268 fwnode_handle_put(domain->fwnode);
269 if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
270 kfree(domain->name);
271 kfree(domain);
272}
273EXPORT_SYMBOL_GPL(irq_domain_remove);
274
275void irq_domain_update_bus_token(struct irq_domain *domain,
276 enum irq_domain_bus_token bus_token)
277{
278 char *name;
279
280 if (domain->bus_token == bus_token)
281 return;
282
283 mutex_lock(&irq_domain_mutex);
284
285 domain->bus_token = bus_token;
286
287 name = kasprintf(GFP_KERNEL, "%s-%d", domain->name, bus_token);
288 if (!name) {
289 mutex_unlock(&irq_domain_mutex);
290 return;
291 }
292
293 debugfs_remove_domain_dir(domain);
294
295 if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
296 kfree(domain->name);
297 else
298 domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
299
300 domain->name = name;
301 debugfs_add_domain_dir(domain);
302
303 mutex_unlock(&irq_domain_mutex);
304}
305EXPORT_SYMBOL_GPL(irq_domain_update_bus_token);
306
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324
325struct irq_domain *irq_domain_create_simple(struct fwnode_handle *fwnode,
326 unsigned int size,
327 unsigned int first_irq,
328 const struct irq_domain_ops *ops,
329 void *host_data)
330{
331 struct irq_domain *domain;
332
333 domain = __irq_domain_add(fwnode, size, size, 0, ops, host_data);
334 if (!domain)
335 return NULL;
336
337 if (first_irq > 0) {
338 if (IS_ENABLED(CONFIG_SPARSE_IRQ)) {
339
340 int rc = irq_alloc_descs(first_irq, first_irq, size,
341 of_node_to_nid(to_of_node(fwnode)));
342 if (rc < 0)
343 pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
344 first_irq);
345 }
346 irq_domain_associate_many(domain, first_irq, 0, size);
347 }
348
349 return domain;
350}
351EXPORT_SYMBOL_GPL(irq_domain_create_simple);
352
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368struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
369 unsigned int size,
370 unsigned int first_irq,
371 irq_hw_number_t first_hwirq,
372 const struct irq_domain_ops *ops,
373 void *host_data)
374{
375 return irq_domain_create_legacy(of_node_to_fwnode(of_node), size,
376 first_irq, first_hwirq, ops, host_data);
377}
378EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
379
380struct irq_domain *irq_domain_create_legacy(struct fwnode_handle *fwnode,
381 unsigned int size,
382 unsigned int first_irq,
383 irq_hw_number_t first_hwirq,
384 const struct irq_domain_ops *ops,
385 void *host_data)
386{
387 struct irq_domain *domain;
388
389 domain = __irq_domain_add(fwnode, first_hwirq + size, first_hwirq + size, 0, ops, host_data);
390 if (domain)
391 irq_domain_associate_many(domain, first_irq, first_hwirq, size);
392
393 return domain;
394}
395EXPORT_SYMBOL_GPL(irq_domain_create_legacy);
396
397
398
399
400
401
402struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
403 enum irq_domain_bus_token bus_token)
404{
405 struct irq_domain *h, *found = NULL;
406 struct fwnode_handle *fwnode = fwspec->fwnode;
407 int rc;
408
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416
417
418 mutex_lock(&irq_domain_mutex);
419 list_for_each_entry(h, &irq_domain_list, link) {
420 if (h->ops->select && fwspec->param_count)
421 rc = h->ops->select(h, fwspec, bus_token);
422 else if (h->ops->match)
423 rc = h->ops->match(h, to_of_node(fwnode), bus_token);
424 else
425 rc = ((fwnode != NULL) && (h->fwnode == fwnode) &&
426 ((bus_token == DOMAIN_BUS_ANY) ||
427 (h->bus_token == bus_token)));
428
429 if (rc) {
430 found = h;
431 break;
432 }
433 }
434 mutex_unlock(&irq_domain_mutex);
435 return found;
436}
437EXPORT_SYMBOL_GPL(irq_find_matching_fwspec);
438
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445
446bool irq_domain_check_msi_remap(void)
447{
448 struct irq_domain *h;
449 bool ret = true;
450
451 mutex_lock(&irq_domain_mutex);
452 list_for_each_entry(h, &irq_domain_list, link) {
453 if (irq_domain_is_msi(h) &&
454 !irq_domain_hierarchical_is_msi_remap(h)) {
455 ret = false;
456 break;
457 }
458 }
459 mutex_unlock(&irq_domain_mutex);
460 return ret;
461}
462EXPORT_SYMBOL_GPL(irq_domain_check_msi_remap);
463
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472
473void irq_set_default_host(struct irq_domain *domain)
474{
475 pr_debug("Default domain set to @0x%p\n", domain);
476
477 irq_default_domain = domain;
478}
479EXPORT_SYMBOL_GPL(irq_set_default_host);
480
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489
490struct irq_domain *irq_get_default_host(void)
491{
492 return irq_default_domain;
493}
494EXPORT_SYMBOL_GPL(irq_get_default_host);
495
496static bool irq_domain_is_nomap(struct irq_domain *domain)
497{
498 return IS_ENABLED(CONFIG_IRQ_DOMAIN_NOMAP) &&
499 (domain->flags & IRQ_DOMAIN_FLAG_NO_MAP);
500}
501
502static void irq_domain_clear_mapping(struct irq_domain *domain,
503 irq_hw_number_t hwirq)
504{
505 if (irq_domain_is_nomap(domain))
506 return;
507
508 mutex_lock(&domain->revmap_mutex);
509 if (hwirq < domain->revmap_size)
510 rcu_assign_pointer(domain->revmap[hwirq], NULL);
511 else
512 radix_tree_delete(&domain->revmap_tree, hwirq);
513 mutex_unlock(&domain->revmap_mutex);
514}
515
516static void irq_domain_set_mapping(struct irq_domain *domain,
517 irq_hw_number_t hwirq,
518 struct irq_data *irq_data)
519{
520 if (irq_domain_is_nomap(domain))
521 return;
522
523 mutex_lock(&domain->revmap_mutex);
524 if (hwirq < domain->revmap_size)
525 rcu_assign_pointer(domain->revmap[hwirq], irq_data);
526 else
527 radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
528 mutex_unlock(&domain->revmap_mutex);
529}
530
531static void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
532{
533 struct irq_data *irq_data = irq_get_irq_data(irq);
534 irq_hw_number_t hwirq;
535
536 if (WARN(!irq_data || irq_data->domain != domain,
537 "virq%i doesn't exist; cannot disassociate\n", irq))
538 return;
539
540 hwirq = irq_data->hwirq;
541 irq_set_status_flags(irq, IRQ_NOREQUEST);
542
543
544 irq_set_chip_and_handler(irq, NULL, NULL);
545
546
547 synchronize_irq(irq);
548
549
550 if (domain->ops->unmap)
551 domain->ops->unmap(domain, irq);
552 smp_mb();
553
554 irq_data->domain = NULL;
555 irq_data->hwirq = 0;
556 domain->mapcount--;
557
558
559 irq_domain_clear_mapping(domain, hwirq);
560}
561
562int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
563 irq_hw_number_t hwirq)
564{
565 struct irq_data *irq_data = irq_get_irq_data(virq);
566 int ret;
567
568 if (WARN(hwirq >= domain->hwirq_max,
569 "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name))
570 return -EINVAL;
571 if (WARN(!irq_data, "error: virq%i is not allocated", virq))
572 return -EINVAL;
573 if (WARN(irq_data->domain, "error: virq%i is already associated", virq))
574 return -EINVAL;
575
576 mutex_lock(&irq_domain_mutex);
577 irq_data->hwirq = hwirq;
578 irq_data->domain = domain;
579 if (domain->ops->map) {
580 ret = domain->ops->map(domain, virq, hwirq);
581 if (ret != 0) {
582
583
584
585
586
587 if (ret != -EPERM) {
588 pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n",
589 domain->name, hwirq, virq, ret);
590 }
591 irq_data->domain = NULL;
592 irq_data->hwirq = 0;
593 mutex_unlock(&irq_domain_mutex);
594 return ret;
595 }
596
597
598 if (!domain->name && irq_data->chip)
599 domain->name = irq_data->chip->name;
600 }
601
602 domain->mapcount++;
603 irq_domain_set_mapping(domain, hwirq, irq_data);
604 mutex_unlock(&irq_domain_mutex);
605
606 irq_clear_status_flags(virq, IRQ_NOREQUEST);
607
608 return 0;
609}
610EXPORT_SYMBOL_GPL(irq_domain_associate);
611
612void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
613 irq_hw_number_t hwirq_base, int count)
614{
615 struct device_node *of_node;
616 int i;
617
618 of_node = irq_domain_get_of_node(domain);
619 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
620 of_node_full_name(of_node), irq_base, (int)hwirq_base, count);
621
622 for (i = 0; i < count; i++) {
623 irq_domain_associate(domain, irq_base + i, hwirq_base + i);
624 }
625}
626EXPORT_SYMBOL_GPL(irq_domain_associate_many);
627
628#ifdef CONFIG_IRQ_DOMAIN_NOMAP
629
630
631
632
633
634
635
636
637
638
639unsigned int irq_create_direct_mapping(struct irq_domain *domain)
640{
641 struct device_node *of_node;
642 unsigned int virq;
643
644 if (domain == NULL)
645 domain = irq_default_domain;
646
647 of_node = irq_domain_get_of_node(domain);
648 virq = irq_alloc_desc_from(1, of_node_to_nid(of_node));
649 if (!virq) {
650 pr_debug("create_direct virq allocation failed\n");
651 return 0;
652 }
653 if (virq >= domain->revmap_size) {
654 pr_err("ERROR: no free irqs available below %i maximum\n",
655 domain->revmap_size);
656 irq_free_desc(virq);
657 return 0;
658 }
659 pr_debug("create_direct obtained virq %d\n", virq);
660
661 if (irq_domain_associate(domain, virq, virq)) {
662 irq_free_desc(virq);
663 return 0;
664 }
665
666 return virq;
667}
668EXPORT_SYMBOL_GPL(irq_create_direct_mapping);
669#endif
670
671
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673
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679
680
681
682unsigned int irq_create_mapping_affinity(struct irq_domain *domain,
683 irq_hw_number_t hwirq,
684 const struct irq_affinity_desc *affinity)
685{
686 struct device_node *of_node;
687 int virq;
688
689 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
690
691
692 if (domain == NULL)
693 domain = irq_default_domain;
694 if (domain == NULL) {
695 WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq);
696 return 0;
697 }
698 pr_debug("-> using domain @%p\n", domain);
699
700 of_node = irq_domain_get_of_node(domain);
701
702
703 virq = irq_find_mapping(domain, hwirq);
704 if (virq) {
705 pr_debug("-> existing mapping on virq %d\n", virq);
706 return virq;
707 }
708
709
710 virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node),
711 affinity);
712 if (virq <= 0) {
713 pr_debug("-> virq allocation failed\n");
714 return 0;
715 }
716
717 if (irq_domain_associate(domain, virq, hwirq)) {
718 irq_free_desc(virq);
719 return 0;
720 }
721
722 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
723 hwirq, of_node_full_name(of_node), virq);
724
725 return virq;
726}
727EXPORT_SYMBOL_GPL(irq_create_mapping_affinity);
728
729static int irq_domain_translate(struct irq_domain *d,
730 struct irq_fwspec *fwspec,
731 irq_hw_number_t *hwirq, unsigned int *type)
732{
733#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
734 if (d->ops->translate)
735 return d->ops->translate(d, fwspec, hwirq, type);
736#endif
737 if (d->ops->xlate)
738 return d->ops->xlate(d, to_of_node(fwspec->fwnode),
739 fwspec->param, fwspec->param_count,
740 hwirq, type);
741
742
743 *hwirq = fwspec->param[0];
744 return 0;
745}
746
747void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,
748 unsigned int count, struct irq_fwspec *fwspec)
749{
750 int i;
751
752 fwspec->fwnode = of_node_to_fwnode(np);
753 fwspec->param_count = count;
754
755 for (i = 0; i < count; i++)
756 fwspec->param[i] = args[i];
757}
758EXPORT_SYMBOL_GPL(of_phandle_args_to_fwspec);
759
760unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
761{
762 struct irq_domain *domain;
763 struct irq_data *irq_data;
764 irq_hw_number_t hwirq;
765 unsigned int type = IRQ_TYPE_NONE;
766 int virq;
767
768 if (fwspec->fwnode) {
769 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_WIRED);
770 if (!domain)
771 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_ANY);
772 } else {
773 domain = irq_default_domain;
774 }
775
776 if (!domain) {
777 pr_warn("no irq domain found for %s !\n",
778 of_node_full_name(to_of_node(fwspec->fwnode)));
779 return 0;
780 }
781
782 if (irq_domain_translate(domain, fwspec, &hwirq, &type))
783 return 0;
784
785
786
787
788
789 if (WARN_ON(type & ~IRQ_TYPE_SENSE_MASK))
790 type &= IRQ_TYPE_SENSE_MASK;
791
792
793
794
795
796 virq = irq_find_mapping(domain, hwirq);
797 if (virq) {
798
799
800
801
802
803 if (type == IRQ_TYPE_NONE || type == irq_get_trigger_type(virq))
804 return virq;
805
806
807
808
809
810 if (irq_get_trigger_type(virq) == IRQ_TYPE_NONE) {
811 irq_data = irq_get_irq_data(virq);
812 if (!irq_data)
813 return 0;
814
815 irqd_set_trigger_type(irq_data, type);
816 return virq;
817 }
818
819 pr_warn("type mismatch, failed to map hwirq-%lu for %s!\n",
820 hwirq, of_node_full_name(to_of_node(fwspec->fwnode)));
821 return 0;
822 }
823
824 if (irq_domain_is_hierarchy(domain)) {
825 virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, fwspec);
826 if (virq <= 0)
827 return 0;
828 } else {
829
830 virq = irq_create_mapping(domain, hwirq);
831 if (!virq)
832 return virq;
833 }
834
835 irq_data = irq_get_irq_data(virq);
836 if (!irq_data) {
837 if (irq_domain_is_hierarchy(domain))
838 irq_domain_free_irqs(virq, 1);
839 else
840 irq_dispose_mapping(virq);
841 return 0;
842 }
843
844
845 irqd_set_trigger_type(irq_data, type);
846
847 return virq;
848}
849EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping);
850
851unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data)
852{
853 struct irq_fwspec fwspec;
854
855 of_phandle_args_to_fwspec(irq_data->np, irq_data->args,
856 irq_data->args_count, &fwspec);
857
858 return irq_create_fwspec_mapping(&fwspec);
859}
860EXPORT_SYMBOL_GPL(irq_create_of_mapping);
861
862
863
864
865
866void irq_dispose_mapping(unsigned int virq)
867{
868 struct irq_data *irq_data = irq_get_irq_data(virq);
869 struct irq_domain *domain;
870
871 if (!virq || !irq_data)
872 return;
873
874 domain = irq_data->domain;
875 if (WARN_ON(domain == NULL))
876 return;
877
878 if (irq_domain_is_hierarchy(domain)) {
879 irq_domain_free_irqs(virq, 1);
880 } else {
881 irq_domain_disassociate(domain, virq);
882 irq_free_desc(virq);
883 }
884}
885EXPORT_SYMBOL_GPL(irq_dispose_mapping);
886
887
888
889
890
891
892
893
894
895struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain,
896 irq_hw_number_t hwirq,
897 unsigned int *irq)
898{
899 struct irq_desc *desc = NULL;
900 struct irq_data *data;
901
902
903 if (domain == NULL)
904 domain = irq_default_domain;
905 if (domain == NULL)
906 return desc;
907
908 if (irq_domain_is_nomap(domain)) {
909 if (hwirq < domain->revmap_size) {
910 data = irq_domain_get_irq_data(domain, hwirq);
911 if (data && data->hwirq == hwirq)
912 desc = irq_data_to_desc(data);
913 }
914
915 return desc;
916 }
917
918 rcu_read_lock();
919
920 if (hwirq < domain->revmap_size)
921 data = rcu_dereference(domain->revmap[hwirq]);
922 else
923 data = radix_tree_lookup(&domain->revmap_tree, hwirq);
924
925 if (likely(data)) {
926 desc = irq_data_to_desc(data);
927 if (irq)
928 *irq = data->irq;
929 }
930
931 rcu_read_unlock();
932 return desc;
933}
934EXPORT_SYMBOL_GPL(__irq_resolve_mapping);
935
936
937
938
939
940
941
942int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
943 const u32 *intspec, unsigned int intsize,
944 unsigned long *out_hwirq, unsigned int *out_type)
945{
946 if (WARN_ON(intsize < 1))
947 return -EINVAL;
948 *out_hwirq = intspec[0];
949 *out_type = IRQ_TYPE_NONE;
950 return 0;
951}
952EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell);
953
954
955
956
957
958
959
960
961int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
962 const u32 *intspec, unsigned int intsize,
963 irq_hw_number_t *out_hwirq, unsigned int *out_type)
964{
965 struct irq_fwspec fwspec;
966
967 of_phandle_args_to_fwspec(ctrlr, intspec, intsize, &fwspec);
968 return irq_domain_translate_twocell(d, &fwspec, out_hwirq, out_type);
969}
970EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell);
971
972
973
974
975
976
977
978
979
980
981
982
983int irq_domain_xlate_onetwocell(struct irq_domain *d,
984 struct device_node *ctrlr,
985 const u32 *intspec, unsigned int intsize,
986 unsigned long *out_hwirq, unsigned int *out_type)
987{
988 if (WARN_ON(intsize < 1))
989 return -EINVAL;
990 *out_hwirq = intspec[0];
991 if (intsize > 1)
992 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
993 else
994 *out_type = IRQ_TYPE_NONE;
995 return 0;
996}
997EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell);
998
999const struct irq_domain_ops irq_domain_simple_ops = {
1000 .xlate = irq_domain_xlate_onetwocell,
1001};
1002EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
1003
1004
1005
1006
1007
1008int irq_domain_translate_onecell(struct irq_domain *d,
1009 struct irq_fwspec *fwspec,
1010 unsigned long *out_hwirq,
1011 unsigned int *out_type)
1012{
1013 if (WARN_ON(fwspec->param_count < 1))
1014 return -EINVAL;
1015 *out_hwirq = fwspec->param[0];
1016 *out_type = IRQ_TYPE_NONE;
1017 return 0;
1018}
1019EXPORT_SYMBOL_GPL(irq_domain_translate_onecell);
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029int irq_domain_translate_twocell(struct irq_domain *d,
1030 struct irq_fwspec *fwspec,
1031 unsigned long *out_hwirq,
1032 unsigned int *out_type)
1033{
1034 if (WARN_ON(fwspec->param_count < 2))
1035 return -EINVAL;
1036 *out_hwirq = fwspec->param[0];
1037 *out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;
1038 return 0;
1039}
1040EXPORT_SYMBOL_GPL(irq_domain_translate_twocell);
1041
1042int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq,
1043 int node, const struct irq_affinity_desc *affinity)
1044{
1045 unsigned int hint;
1046
1047 if (virq >= 0) {
1048 virq = __irq_alloc_descs(virq, virq, cnt, node, THIS_MODULE,
1049 affinity);
1050 } else {
1051 hint = hwirq % nr_irqs;
1052 if (hint == 0)
1053 hint++;
1054 virq = __irq_alloc_descs(-1, hint, cnt, node, THIS_MODULE,
1055 affinity);
1056 if (virq <= 0 && hint > 1) {
1057 virq = __irq_alloc_descs(-1, 1, cnt, node, THIS_MODULE,
1058 affinity);
1059 }
1060 }
1061
1062 return virq;
1063}
1064
1065
1066
1067
1068
1069void irq_domain_reset_irq_data(struct irq_data *irq_data)
1070{
1071 irq_data->hwirq = 0;
1072 irq_data->chip = &no_irq_chip;
1073 irq_data->chip_data = NULL;
1074}
1075EXPORT_SYMBOL_GPL(irq_domain_reset_irq_data);
1076
1077#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
1094 unsigned int flags,
1095 unsigned int size,
1096 struct fwnode_handle *fwnode,
1097 const struct irq_domain_ops *ops,
1098 void *host_data)
1099{
1100 struct irq_domain *domain;
1101
1102 if (size)
1103 domain = irq_domain_create_linear(fwnode, size, ops, host_data);
1104 else
1105 domain = irq_domain_create_tree(fwnode, ops, host_data);
1106 if (domain) {
1107 domain->parent = parent;
1108 domain->flags |= flags;
1109 }
1110
1111 return domain;
1112}
1113EXPORT_SYMBOL_GPL(irq_domain_create_hierarchy);
1114
1115static void irq_domain_insert_irq(int virq)
1116{
1117 struct irq_data *data;
1118
1119 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1120 struct irq_domain *domain = data->domain;
1121
1122 domain->mapcount++;
1123 irq_domain_set_mapping(domain, data->hwirq, data);
1124
1125
1126 if (!domain->name && data->chip)
1127 domain->name = data->chip->name;
1128 }
1129
1130 irq_clear_status_flags(virq, IRQ_NOREQUEST);
1131}
1132
1133static void irq_domain_remove_irq(int virq)
1134{
1135 struct irq_data *data;
1136
1137 irq_set_status_flags(virq, IRQ_NOREQUEST);
1138 irq_set_chip_and_handler(virq, NULL, NULL);
1139 synchronize_irq(virq);
1140 smp_mb();
1141
1142 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1143 struct irq_domain *domain = data->domain;
1144 irq_hw_number_t hwirq = data->hwirq;
1145
1146 domain->mapcount--;
1147 irq_domain_clear_mapping(domain, hwirq);
1148 }
1149}
1150
1151static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain,
1152 struct irq_data *child)
1153{
1154 struct irq_data *irq_data;
1155
1156 irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL,
1157 irq_data_get_node(child));
1158 if (irq_data) {
1159 child->parent_data = irq_data;
1160 irq_data->irq = child->irq;
1161 irq_data->common = child->common;
1162 irq_data->domain = domain;
1163 }
1164
1165 return irq_data;
1166}
1167
1168static void __irq_domain_free_hierarchy(struct irq_data *irq_data)
1169{
1170 struct irq_data *tmp;
1171
1172 while (irq_data) {
1173 tmp = irq_data;
1174 irq_data = irq_data->parent_data;
1175 kfree(tmp);
1176 }
1177}
1178
1179static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs)
1180{
1181 struct irq_data *irq_data, *tmp;
1182 int i;
1183
1184 for (i = 0; i < nr_irqs; i++) {
1185 irq_data = irq_get_irq_data(virq + i);
1186 tmp = irq_data->parent_data;
1187 irq_data->parent_data = NULL;
1188 irq_data->domain = NULL;
1189
1190 __irq_domain_free_hierarchy(tmp);
1191 }
1192}
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207int irq_domain_disconnect_hierarchy(struct irq_domain *domain,
1208 unsigned int virq)
1209{
1210 struct irq_data *irqd;
1211
1212 irqd = irq_domain_get_irq_data(domain, virq);
1213 if (!irqd)
1214 return -EINVAL;
1215
1216 irqd->chip = ERR_PTR(-ENOTCONN);
1217 return 0;
1218}
1219EXPORT_SYMBOL_GPL(irq_domain_disconnect_hierarchy);
1220
1221static int irq_domain_trim_hierarchy(unsigned int virq)
1222{
1223 struct irq_data *tail, *irqd, *irq_data;
1224
1225 irq_data = irq_get_irq_data(virq);
1226 tail = NULL;
1227
1228
1229 if (!irq_data->chip || IS_ERR(irq_data->chip))
1230 return -EINVAL;
1231
1232
1233
1234
1235
1236 for (irqd = irq_data->parent_data; irqd; irq_data = irqd, irqd = irqd->parent_data) {
1237
1238 if (irqd->chip && tail)
1239 return -EINVAL;
1240
1241
1242 if (!irqd->chip && !tail)
1243 return -EINVAL;
1244
1245 if (IS_ERR(irqd->chip)) {
1246
1247 if (PTR_ERR(irqd->chip) != -ENOTCONN)
1248 return -EINVAL;
1249
1250 tail = irq_data;
1251 }
1252 }
1253
1254
1255 if (!tail)
1256 return 0;
1257
1258 pr_info("IRQ%d: trimming hierarchy from %s\n",
1259 virq, tail->parent_data->domain->name);
1260
1261
1262 irqd = tail;
1263 tail = tail->parent_data;
1264 irqd->parent_data = NULL;
1265 __irq_domain_free_hierarchy(tail);
1266
1267 return 0;
1268}
1269
1270static int irq_domain_alloc_irq_data(struct irq_domain *domain,
1271 unsigned int virq, unsigned int nr_irqs)
1272{
1273 struct irq_data *irq_data;
1274 struct irq_domain *parent;
1275 int i;
1276
1277
1278 for (i = 0; i < nr_irqs; i++) {
1279 irq_data = irq_get_irq_data(virq + i);
1280 irq_data->domain = domain;
1281
1282 for (parent = domain->parent; parent; parent = parent->parent) {
1283 irq_data = irq_domain_insert_irq_data(parent, irq_data);
1284 if (!irq_data) {
1285 irq_domain_free_irq_data(virq, i + 1);
1286 return -ENOMEM;
1287 }
1288 }
1289 }
1290
1291 return 0;
1292}
1293
1294
1295
1296
1297
1298
1299struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1300 unsigned int virq)
1301{
1302 struct irq_data *irq_data;
1303
1304 for (irq_data = irq_get_irq_data(virq); irq_data;
1305 irq_data = irq_data->parent_data)
1306 if (irq_data->domain == domain)
1307 return irq_data;
1308
1309 return NULL;
1310}
1311EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq,
1322 irq_hw_number_t hwirq,
1323 const struct irq_chip *chip,
1324 void *chip_data)
1325{
1326 struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq);
1327
1328 if (!irq_data)
1329 return -ENOENT;
1330
1331 irq_data->hwirq = hwirq;
1332 irq_data->chip = (struct irq_chip *)(chip ? chip : &no_irq_chip);
1333 irq_data->chip_data = chip_data;
1334
1335 return 0;
1336}
1337EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip);
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1351 irq_hw_number_t hwirq, const struct irq_chip *chip,
1352 void *chip_data, irq_flow_handler_t handler,
1353 void *handler_data, const char *handler_name)
1354{
1355 irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data);
1356 __irq_set_handler(virq, handler, 0, handler_name);
1357 irq_set_handler_data(virq, handler_data);
1358}
1359EXPORT_SYMBOL(irq_domain_set_info);
1360
1361
1362
1363
1364
1365
1366
1367void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq,
1368 unsigned int nr_irqs)
1369{
1370 struct irq_data *irq_data;
1371 int i;
1372
1373 for (i = 0; i < nr_irqs; i++) {
1374 irq_data = irq_domain_get_irq_data(domain, virq + i);
1375 if (irq_data)
1376 irq_domain_reset_irq_data(irq_data);
1377 }
1378 irq_domain_free_irqs_parent(domain, virq, nr_irqs);
1379}
1380EXPORT_SYMBOL_GPL(irq_domain_free_irqs_common);
1381
1382
1383
1384
1385
1386
1387
1388void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq,
1389 unsigned int nr_irqs)
1390{
1391 int i;
1392
1393 for (i = 0; i < nr_irqs; i++) {
1394 irq_set_handler_data(virq + i, NULL);
1395 irq_set_handler(virq + i, NULL);
1396 }
1397 irq_domain_free_irqs_common(domain, virq, nr_irqs);
1398}
1399
1400static void irq_domain_free_irqs_hierarchy(struct irq_domain *domain,
1401 unsigned int irq_base,
1402 unsigned int nr_irqs)
1403{
1404 unsigned int i;
1405
1406 if (!domain->ops->free)
1407 return;
1408
1409 for (i = 0; i < nr_irqs; i++) {
1410 if (irq_domain_get_irq_data(domain, irq_base + i))
1411 domain->ops->free(domain, irq_base + i, 1);
1412 }
1413}
1414
1415int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,
1416 unsigned int irq_base,
1417 unsigned int nr_irqs, void *arg)
1418{
1419 if (!domain->ops->alloc) {
1420 pr_debug("domain->ops->alloc() is NULL\n");
1421 return -ENOSYS;
1422 }
1423
1424 return domain->ops->alloc(domain, irq_base, nr_irqs, arg);
1425}
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
1450 unsigned int nr_irqs, int node, void *arg,
1451 bool realloc, const struct irq_affinity_desc *affinity)
1452{
1453 int i, ret, virq;
1454
1455 if (domain == NULL) {
1456 domain = irq_default_domain;
1457 if (WARN(!domain, "domain is NULL; cannot allocate IRQ\n"))
1458 return -EINVAL;
1459 }
1460
1461 if (realloc && irq_base >= 0) {
1462 virq = irq_base;
1463 } else {
1464 virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node,
1465 affinity);
1466 if (virq < 0) {
1467 pr_debug("cannot allocate IRQ(base %d, count %d)\n",
1468 irq_base, nr_irqs);
1469 return virq;
1470 }
1471 }
1472
1473 if (irq_domain_alloc_irq_data(domain, virq, nr_irqs)) {
1474 pr_debug("cannot allocate memory for IRQ%d\n", virq);
1475 ret = -ENOMEM;
1476 goto out_free_desc;
1477 }
1478
1479 mutex_lock(&irq_domain_mutex);
1480 ret = irq_domain_alloc_irqs_hierarchy(domain, virq, nr_irqs, arg);
1481 if (ret < 0) {
1482 mutex_unlock(&irq_domain_mutex);
1483 goto out_free_irq_data;
1484 }
1485
1486 for (i = 0; i < nr_irqs; i++) {
1487 ret = irq_domain_trim_hierarchy(virq + i);
1488 if (ret) {
1489 mutex_unlock(&irq_domain_mutex);
1490 goto out_free_irq_data;
1491 }
1492 }
1493
1494 for (i = 0; i < nr_irqs; i++)
1495 irq_domain_insert_irq(virq + i);
1496 mutex_unlock(&irq_domain_mutex);
1497
1498 return virq;
1499
1500out_free_irq_data:
1501 irq_domain_free_irq_data(virq, nr_irqs);
1502out_free_desc:
1503 irq_free_descs(virq, nr_irqs);
1504 return ret;
1505}
1506EXPORT_SYMBOL_GPL(__irq_domain_alloc_irqs);
1507
1508
1509static void irq_domain_fix_revmap(struct irq_data *d)
1510{
1511 void __rcu **slot;
1512
1513 if (irq_domain_is_nomap(d->domain))
1514 return;
1515
1516
1517 mutex_lock(&d->domain->revmap_mutex);
1518 if (d->hwirq < d->domain->revmap_size) {
1519
1520 rcu_assign_pointer(d->domain->revmap[d->hwirq], d);
1521 } else {
1522 slot = radix_tree_lookup_slot(&d->domain->revmap_tree, d->hwirq);
1523 if (slot)
1524 radix_tree_replace_slot(&d->domain->revmap_tree, slot, d);
1525 }
1526 mutex_unlock(&d->domain->revmap_mutex);
1527}
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg)
1541{
1542 struct irq_data *child_irq_data;
1543 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1544 struct irq_desc *desc;
1545 int rv = 0;
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556 desc = irq_to_desc(virq);
1557 if (!desc)
1558 return -EINVAL;
1559 if (WARN_ON(desc->action))
1560 return -EBUSY;
1561
1562 if (domain == NULL)
1563 return -EINVAL;
1564
1565 if (WARN_ON(!irq_domain_is_hierarchy(domain)))
1566 return -EINVAL;
1567
1568 if (!root_irq_data)
1569 return -EINVAL;
1570
1571 if (domain->parent != root_irq_data->domain)
1572 return -EINVAL;
1573
1574 child_irq_data = kzalloc_node(sizeof(*child_irq_data), GFP_KERNEL,
1575 irq_data_get_node(root_irq_data));
1576 if (!child_irq_data)
1577 return -ENOMEM;
1578
1579 mutex_lock(&irq_domain_mutex);
1580
1581
1582 *child_irq_data = *root_irq_data;
1583
1584
1585
1586
1587
1588 root_irq_data->parent_data = child_irq_data;
1589 root_irq_data->domain = domain;
1590 root_irq_data->mask = 0;
1591 root_irq_data->hwirq = 0;
1592 root_irq_data->chip = NULL;
1593 root_irq_data->chip_data = NULL;
1594
1595
1596 rv = irq_domain_alloc_irqs_hierarchy(domain, virq, 1, arg);
1597 if (rv) {
1598
1599 *root_irq_data = *child_irq_data;
1600 kfree(child_irq_data);
1601 goto error;
1602 }
1603
1604 irq_domain_fix_revmap(child_irq_data);
1605 irq_domain_set_mapping(domain, root_irq_data->hwirq, root_irq_data);
1606
1607error:
1608 mutex_unlock(&irq_domain_mutex);
1609
1610 return rv;
1611}
1612EXPORT_SYMBOL_GPL(irq_domain_push_irq);
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622int irq_domain_pop_irq(struct irq_domain *domain, int virq)
1623{
1624 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1625 struct irq_data *child_irq_data;
1626 struct irq_data *tmp_irq_data;
1627 struct irq_desc *desc;
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638 desc = irq_to_desc(virq);
1639 if (!desc)
1640 return -EINVAL;
1641 if (WARN_ON(desc->action))
1642 return -EBUSY;
1643
1644 if (domain == NULL)
1645 return -EINVAL;
1646
1647 if (!root_irq_data)
1648 return -EINVAL;
1649
1650 tmp_irq_data = irq_domain_get_irq_data(domain, virq);
1651
1652
1653 if (WARN_ON(root_irq_data != tmp_irq_data))
1654 return -EINVAL;
1655
1656 if (WARN_ON(root_irq_data->domain != domain))
1657 return -EINVAL;
1658
1659 child_irq_data = root_irq_data->parent_data;
1660 if (WARN_ON(!child_irq_data))
1661 return -EINVAL;
1662
1663 mutex_lock(&irq_domain_mutex);
1664
1665 root_irq_data->parent_data = NULL;
1666
1667 irq_domain_clear_mapping(domain, root_irq_data->hwirq);
1668 irq_domain_free_irqs_hierarchy(domain, virq, 1);
1669
1670
1671 *root_irq_data = *child_irq_data;
1672
1673 irq_domain_fix_revmap(root_irq_data);
1674
1675 mutex_unlock(&irq_domain_mutex);
1676
1677 kfree(child_irq_data);
1678
1679 return 0;
1680}
1681EXPORT_SYMBOL_GPL(irq_domain_pop_irq);
1682
1683
1684
1685
1686
1687
1688void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs)
1689{
1690 struct irq_data *data = irq_get_irq_data(virq);
1691 int i;
1692
1693 if (WARN(!data || !data->domain || !data->domain->ops->free,
1694 "NULL pointer, cannot free irq\n"))
1695 return;
1696
1697 mutex_lock(&irq_domain_mutex);
1698 for (i = 0; i < nr_irqs; i++)
1699 irq_domain_remove_irq(virq + i);
1700 irq_domain_free_irqs_hierarchy(data->domain, virq, nr_irqs);
1701 mutex_unlock(&irq_domain_mutex);
1702
1703 irq_domain_free_irq_data(virq, nr_irqs);
1704 irq_free_descs(virq, nr_irqs);
1705}
1706
1707
1708
1709
1710
1711
1712
1713
1714int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
1715 unsigned int irq_base, unsigned int nr_irqs,
1716 void *arg)
1717{
1718 if (!domain->parent)
1719 return -ENOSYS;
1720
1721 return irq_domain_alloc_irqs_hierarchy(domain->parent, irq_base,
1722 nr_irqs, arg);
1723}
1724EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent);
1725
1726
1727
1728
1729
1730
1731
1732void irq_domain_free_irqs_parent(struct irq_domain *domain,
1733 unsigned int irq_base, unsigned int nr_irqs)
1734{
1735 if (!domain->parent)
1736 return;
1737
1738 irq_domain_free_irqs_hierarchy(domain->parent, irq_base, nr_irqs);
1739}
1740EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent);
1741
1742static void __irq_domain_deactivate_irq(struct irq_data *irq_data)
1743{
1744 if (irq_data && irq_data->domain) {
1745 struct irq_domain *domain = irq_data->domain;
1746
1747 if (domain->ops->deactivate)
1748 domain->ops->deactivate(domain, irq_data);
1749 if (irq_data->parent_data)
1750 __irq_domain_deactivate_irq(irq_data->parent_data);
1751 }
1752}
1753
1754static int __irq_domain_activate_irq(struct irq_data *irqd, bool reserve)
1755{
1756 int ret = 0;
1757
1758 if (irqd && irqd->domain) {
1759 struct irq_domain *domain = irqd->domain;
1760
1761 if (irqd->parent_data)
1762 ret = __irq_domain_activate_irq(irqd->parent_data,
1763 reserve);
1764 if (!ret && domain->ops->activate) {
1765 ret = domain->ops->activate(domain, irqd, reserve);
1766
1767 if (ret && irqd->parent_data)
1768 __irq_domain_deactivate_irq(irqd->parent_data);
1769 }
1770 }
1771 return ret;
1772}
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783int irq_domain_activate_irq(struct irq_data *irq_data, bool reserve)
1784{
1785 int ret = 0;
1786
1787 if (!irqd_is_activated(irq_data))
1788 ret = __irq_domain_activate_irq(irq_data, reserve);
1789 if (!ret)
1790 irqd_set_activated(irq_data);
1791 return ret;
1792}
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802void irq_domain_deactivate_irq(struct irq_data *irq_data)
1803{
1804 if (irqd_is_activated(irq_data)) {
1805 __irq_domain_deactivate_irq(irq_data);
1806 irqd_clr_activated(irq_data);
1807 }
1808}
1809
1810static void irq_domain_check_hierarchy(struct irq_domain *domain)
1811{
1812
1813 if (domain->ops->alloc)
1814 domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY;
1815}
1816
1817
1818
1819
1820
1821
1822bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain)
1823{
1824 for (; domain; domain = domain->parent) {
1825 if (irq_domain_is_msi_remap(domain))
1826 return true;
1827 }
1828 return false;
1829}
1830#else
1831
1832
1833
1834
1835
1836struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1837 unsigned int virq)
1838{
1839 struct irq_data *irq_data = irq_get_irq_data(virq);
1840
1841 return (irq_data && irq_data->domain == domain) ? irq_data : NULL;
1842}
1843EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1857 irq_hw_number_t hwirq, const struct irq_chip *chip,
1858 void *chip_data, irq_flow_handler_t handler,
1859 void *handler_data, const char *handler_name)
1860{
1861 irq_set_chip_and_handler_name(virq, chip, handler, handler_name);
1862 irq_set_chip_data(virq, chip_data);
1863 irq_set_handler_data(virq, handler_data);
1864}
1865
1866static void irq_domain_check_hierarchy(struct irq_domain *domain)
1867{
1868}
1869#endif
1870
1871#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
1872static struct dentry *domain_dir;
1873
1874static void
1875irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind)
1876{
1877 seq_printf(m, "%*sname: %s\n", ind, "", d->name);
1878 seq_printf(m, "%*ssize: %u\n", ind + 1, "", d->revmap_size);
1879 seq_printf(m, "%*smapped: %u\n", ind + 1, "", d->mapcount);
1880 seq_printf(m, "%*sflags: 0x%08x\n", ind +1 , "", d->flags);
1881 if (d->ops && d->ops->debug_show)
1882 d->ops->debug_show(m, d, NULL, ind + 1);
1883#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1884 if (!d->parent)
1885 return;
1886 seq_printf(m, "%*sparent: %s\n", ind + 1, "", d->parent->name);
1887 irq_domain_debug_show_one(m, d->parent, ind + 4);
1888#endif
1889}
1890
1891static int irq_domain_debug_show(struct seq_file *m, void *p)
1892{
1893 struct irq_domain *d = m->private;
1894
1895
1896 if (!d) {
1897 if (!irq_default_domain)
1898 return 0;
1899 d = irq_default_domain;
1900 }
1901 irq_domain_debug_show_one(m, d, 0);
1902 return 0;
1903}
1904DEFINE_SHOW_ATTRIBUTE(irq_domain_debug);
1905
1906static void debugfs_add_domain_dir(struct irq_domain *d)
1907{
1908 if (!d->name || !domain_dir)
1909 return;
1910 debugfs_create_file(d->name, 0444, domain_dir, d,
1911 &irq_domain_debug_fops);
1912}
1913
1914static void debugfs_remove_domain_dir(struct irq_domain *d)
1915{
1916 debugfs_remove(debugfs_lookup(d->name, domain_dir));
1917}
1918
1919void __init irq_domain_debugfs_init(struct dentry *root)
1920{
1921 struct irq_domain *d;
1922
1923 domain_dir = debugfs_create_dir("domains", root);
1924
1925 debugfs_create_file("default", 0444, domain_dir, NULL,
1926 &irq_domain_debug_fops);
1927 mutex_lock(&irq_domain_mutex);
1928 list_for_each_entry(d, &irq_domain_list, link)
1929 debugfs_add_domain_dir(d);
1930 mutex_unlock(&irq_domain_mutex);
1931}
1932#endif
1933