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1#define pr_fmt(fmt) "irq: " fmt
2
3#include <linux/debugfs.h>
4#include <linux/hardirq.h>
5#include <linux/interrupt.h>
6#include <linux/irq.h>
7#include <linux/irqdesc.h>
8#include <linux/irqdomain.h>
9#include <linux/module.h>
10#include <linux/mutex.h>
11#include <linux/of.h>
12#include <linux/of_address.h>
13#include <linux/of_irq.h>
14#include <linux/topology.h>
15#include <linux/seq_file.h>
16#include <linux/slab.h>
17#include <linux/smp.h>
18#include <linux/fs.h>
19
20static LIST_HEAD(irq_domain_list);
21static DEFINE_MUTEX(irq_domain_mutex);
22
23static DEFINE_MUTEX(revmap_trees_mutex);
24static struct irq_domain *irq_default_domain;
25
26static void irq_domain_check_hierarchy(struct irq_domain *domain);
27
28struct irqchip_fwid {
29 struct fwnode_handle fwnode;
30 char *name;
31 void *data;
32};
33
34/**
35 * irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for
36 * identifying an irq domain
37 * @data: optional user-provided data
38 *
39 * Allocate a struct device_node, and return a poiner to the embedded
40 * fwnode_handle (or NULL on failure).
41 */
42struct fwnode_handle *irq_domain_alloc_fwnode(void *data)
43{
44 struct irqchip_fwid *fwid;
45 char *name;
46
47 fwid = kzalloc(sizeof(*fwid), GFP_KERNEL);
48 name = kasprintf(GFP_KERNEL, "irqchip@%p", data);
49
50 if (!fwid || !name) {
51 kfree(fwid);
52 kfree(name);
53 return NULL;
54 }
55
56 fwid->name = name;
57 fwid->data = data;
58 fwid->fwnode.type = FWNODE_IRQCHIP;
59 return &fwid->fwnode;
60}
61EXPORT_SYMBOL_GPL(irq_domain_alloc_fwnode);
62
63/**
64 * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle
65 *
66 * Free a fwnode_handle allocated with irq_domain_alloc_fwnode.
67 */
68void irq_domain_free_fwnode(struct fwnode_handle *fwnode)
69{
70 struct irqchip_fwid *fwid;
71
72 if (WARN_ON(!is_fwnode_irqchip(fwnode)))
73 return;
74
75 fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
76 kfree(fwid->name);
77 kfree(fwid);
78}
79EXPORT_SYMBOL_GPL(irq_domain_free_fwnode);
80
81/**
82 * __irq_domain_add() - Allocate a new irq_domain data structure
83 * @fwnode: firmware node for the interrupt controller
84 * @size: Size of linear map; 0 for radix mapping only
85 * @hwirq_max: Maximum number of interrupts supported by controller
86 * @direct_max: Maximum value of direct maps; Use ~0 for no limit; 0 for no
87 * direct mapping
88 * @ops: domain callbacks
89 * @host_data: Controller private data pointer
90 *
91 * Allocates and initialize and irq_domain structure.
92 * Returns pointer to IRQ domain, or NULL on failure.
93 */
94struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
95 irq_hw_number_t hwirq_max, int direct_max,
96 const struct irq_domain_ops *ops,
97 void *host_data)
98{
99 struct device_node *of_node = to_of_node(fwnode);
100 struct irq_domain *domain;
101
102 domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size),
103 GFP_KERNEL, of_node_to_nid(of_node));
104 if (WARN_ON(!domain))
105 return NULL;
106
107 of_node_get(of_node);
108
109 /* Fill structure */
110 INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
111 domain->ops = ops;
112 domain->host_data = host_data;
113 domain->fwnode = fwnode;
114 domain->hwirq_max = hwirq_max;
115 domain->revmap_size = size;
116 domain->revmap_direct_max_irq = direct_max;
117 irq_domain_check_hierarchy(domain);
118
119 mutex_lock(&irq_domain_mutex);
120 list_add(&domain->link, &irq_domain_list);
121 mutex_unlock(&irq_domain_mutex);
122
123 pr_debug("Added domain %s\n", domain->name);
124 return domain;
125}
126EXPORT_SYMBOL_GPL(__irq_domain_add);
127
128/**
129 * irq_domain_remove() - Remove an irq domain.
130 * @domain: domain to remove
131 *
132 * This routine is used to remove an irq domain. The caller must ensure
133 * that all mappings within the domain have been disposed of prior to
134 * use, depending on the revmap type.
135 */
136void irq_domain_remove(struct irq_domain *domain)
137{
138 mutex_lock(&irq_domain_mutex);
139
140 WARN_ON(!radix_tree_empty(&domain->revmap_tree));
141
142 list_del(&domain->link);
143
144 /*
145 * If the going away domain is the default one, reset it.
146 */
147 if (unlikely(irq_default_domain == domain))
148 irq_set_default_host(NULL);
149
150 mutex_unlock(&irq_domain_mutex);
151
152 pr_debug("Removed domain %s\n", domain->name);
153
154 of_node_put(irq_domain_get_of_node(domain));
155 kfree(domain);
156}
157EXPORT_SYMBOL_GPL(irq_domain_remove);
158
159/**
160 * irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs
161 * @of_node: pointer to interrupt controller's device tree node.
162 * @size: total number of irqs in mapping
163 * @first_irq: first number of irq block assigned to the domain,
164 * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then
165 * pre-map all of the irqs in the domain to virqs starting at first_irq.
166 * @ops: domain callbacks
167 * @host_data: Controller private data pointer
168 *
169 * Allocates an irq_domain, and optionally if first_irq is positive then also
170 * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq.
171 *
172 * This is intended to implement the expected behaviour for most
173 * interrupt controllers. If device tree is used, then first_irq will be 0 and
174 * irqs get mapped dynamically on the fly. However, if the controller requires
175 * static virq assignments (non-DT boot) then it will set that up correctly.
176 */
177struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
178 unsigned int size,
179 unsigned int first_irq,
180 const struct irq_domain_ops *ops,
181 void *host_data)
182{
183 struct irq_domain *domain;
184
185 domain = __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data);
186 if (!domain)
187 return NULL;
188
189 if (first_irq > 0) {
190 if (IS_ENABLED(CONFIG_SPARSE_IRQ)) {
191 /* attempt to allocated irq_descs */
192 int rc = irq_alloc_descs(first_irq, first_irq, size,
193 of_node_to_nid(of_node));
194 if (rc < 0)
195 pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
196 first_irq);
197 }
198 irq_domain_associate_many(domain, first_irq, 0, size);
199 }
200
201 return domain;
202}
203EXPORT_SYMBOL_GPL(irq_domain_add_simple);
204
205/**
206 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain.
207 * @of_node: pointer to interrupt controller's device tree node.
208 * @size: total number of irqs in legacy mapping
209 * @first_irq: first number of irq block assigned to the domain
210 * @first_hwirq: first hwirq number to use for the translation. Should normally
211 * be '0', but a positive integer can be used if the effective
212 * hwirqs numbering does not begin at zero.
213 * @ops: map/unmap domain callbacks
214 * @host_data: Controller private data pointer
215 *
216 * Note: the map() callback will be called before this function returns
217 * for all legacy interrupts except 0 (which is always the invalid irq for
218 * a legacy controller).
219 */
220struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
221 unsigned int size,
222 unsigned int first_irq,
223 irq_hw_number_t first_hwirq,
224 const struct irq_domain_ops *ops,
225 void *host_data)
226{
227 struct irq_domain *domain;
228
229 domain = __irq_domain_add(of_node_to_fwnode(of_node), first_hwirq + size,
230 first_hwirq + size, 0, ops, host_data);
231 if (domain)
232 irq_domain_associate_many(domain, first_irq, first_hwirq, size);
233
234 return domain;
235}
236EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
237
238/**
239 * irq_find_matching_fwspec() - Locates a domain for a given fwspec
240 * @fwspec: FW specifier for an interrupt
241 * @bus_token: domain-specific data
242 */
243struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
244 enum irq_domain_bus_token bus_token)
245{
246 struct irq_domain *h, *found = NULL;
247 struct fwnode_handle *fwnode = fwspec->fwnode;
248 int rc;
249
250 /* We might want to match the legacy controller last since
251 * it might potentially be set to match all interrupts in
252 * the absence of a device node. This isn't a problem so far
253 * yet though...
254 *
255 * bus_token == DOMAIN_BUS_ANY matches any domain, any other
256 * values must generate an exact match for the domain to be
257 * selected.
258 */
259 mutex_lock(&irq_domain_mutex);
260 list_for_each_entry(h, &irq_domain_list, link) {
261 if (h->ops->select && fwspec->param_count)
262 rc = h->ops->select(h, fwspec, bus_token);
263 else if (h->ops->match)
264 rc = h->ops->match(h, to_of_node(fwnode), bus_token);
265 else
266 rc = ((fwnode != NULL) && (h->fwnode == fwnode) &&
267 ((bus_token == DOMAIN_BUS_ANY) ||
268 (h->bus_token == bus_token)));
269
270 if (rc) {
271 found = h;
272 break;
273 }
274 }
275 mutex_unlock(&irq_domain_mutex);
276 return found;
277}
278EXPORT_SYMBOL_GPL(irq_find_matching_fwspec);
279
280/**
281 * irq_set_default_host() - Set a "default" irq domain
282 * @domain: default domain pointer
283 *
284 * For convenience, it's possible to set a "default" domain that will be used
285 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
286 * platforms that want to manipulate a few hard coded interrupt numbers that
287 * aren't properly represented in the device-tree.
288 */
289void irq_set_default_host(struct irq_domain *domain)
290{
291 pr_debug("Default domain set to @0x%p\n", domain);
292
293 irq_default_domain = domain;
294}
295EXPORT_SYMBOL_GPL(irq_set_default_host);
296
297void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
298{
299 struct irq_data *irq_data = irq_get_irq_data(irq);
300 irq_hw_number_t hwirq;
301
302 if (WARN(!irq_data || irq_data->domain != domain,
303 "virq%i doesn't exist; cannot disassociate\n", irq))
304 return;
305
306 hwirq = irq_data->hwirq;
307 irq_set_status_flags(irq, IRQ_NOREQUEST);
308
309 /* remove chip and handler */
310 irq_set_chip_and_handler(irq, NULL, NULL);
311
312 /* Make sure it's completed */
313 synchronize_irq(irq);
314
315 /* Tell the PIC about it */
316 if (domain->ops->unmap)
317 domain->ops->unmap(domain, irq);
318 smp_mb();
319
320 irq_data->domain = NULL;
321 irq_data->hwirq = 0;
322
323 /* Clear reverse map for this hwirq */
324 if (hwirq < domain->revmap_size) {
325 domain->linear_revmap[hwirq] = 0;
326 } else {
327 mutex_lock(&revmap_trees_mutex);
328 radix_tree_delete(&domain->revmap_tree, hwirq);
329 mutex_unlock(&revmap_trees_mutex);
330 }
331}
332
333int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
334 irq_hw_number_t hwirq)
335{
336 struct irq_data *irq_data = irq_get_irq_data(virq);
337 int ret;
338
339 if (WARN(hwirq >= domain->hwirq_max,
340 "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name))
341 return -EINVAL;
342 if (WARN(!irq_data, "error: virq%i is not allocated", virq))
343 return -EINVAL;
344 if (WARN(irq_data->domain, "error: virq%i is already associated", virq))
345 return -EINVAL;
346
347 mutex_lock(&irq_domain_mutex);
348 irq_data->hwirq = hwirq;
349 irq_data->domain = domain;
350 if (domain->ops->map) {
351 ret = domain->ops->map(domain, virq, hwirq);
352 if (ret != 0) {
353 /*
354 * If map() returns -EPERM, this interrupt is protected
355 * by the firmware or some other service and shall not
356 * be mapped. Don't bother telling the user about it.
357 */
358 if (ret != -EPERM) {
359 pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n",
360 domain->name, hwirq, virq, ret);
361 }
362 irq_data->domain = NULL;
363 irq_data->hwirq = 0;
364 mutex_unlock(&irq_domain_mutex);
365 return ret;
366 }
367
368 /* If not already assigned, give the domain the chip's name */
369 if (!domain->name && irq_data->chip)
370 domain->name = irq_data->chip->name;
371 }
372
373 if (hwirq < domain->revmap_size) {
374 domain->linear_revmap[hwirq] = virq;
375 } else {
376 mutex_lock(&revmap_trees_mutex);
377 radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
378 mutex_unlock(&revmap_trees_mutex);
379 }
380 mutex_unlock(&irq_domain_mutex);
381
382 irq_clear_status_flags(virq, IRQ_NOREQUEST);
383
384 return 0;
385}
386EXPORT_SYMBOL_GPL(irq_domain_associate);
387
388void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
389 irq_hw_number_t hwirq_base, int count)
390{
391 struct device_node *of_node;
392 int i;
393
394 of_node = irq_domain_get_of_node(domain);
395 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
396 of_node_full_name(of_node), irq_base, (int)hwirq_base, count);
397
398 for (i = 0; i < count; i++) {
399 irq_domain_associate(domain, irq_base + i, hwirq_base + i);
400 }
401}
402EXPORT_SYMBOL_GPL(irq_domain_associate_many);
403
404/**
405 * irq_create_direct_mapping() - Allocate an irq for direct mapping
406 * @domain: domain to allocate the irq for or NULL for default domain
407 *
408 * This routine is used for irq controllers which can choose the hardware
409 * interrupt numbers they generate. In such a case it's simplest to use
410 * the linux irq as the hardware interrupt number. It still uses the linear
411 * or radix tree to store the mapping, but the irq controller can optimize
412 * the revmap path by using the hwirq directly.
413 */
414unsigned int irq_create_direct_mapping(struct irq_domain *domain)
415{
416 struct device_node *of_node;
417 unsigned int virq;
418
419 if (domain == NULL)
420 domain = irq_default_domain;
421
422 of_node = irq_domain_get_of_node(domain);
423 virq = irq_alloc_desc_from(1, of_node_to_nid(of_node));
424 if (!virq) {
425 pr_debug("create_direct virq allocation failed\n");
426 return 0;
427 }
428 if (virq >= domain->revmap_direct_max_irq) {
429 pr_err("ERROR: no free irqs available below %i maximum\n",
430 domain->revmap_direct_max_irq);
431 irq_free_desc(virq);
432 return 0;
433 }
434 pr_debug("create_direct obtained virq %d\n", virq);
435
436 if (irq_domain_associate(domain, virq, virq)) {
437 irq_free_desc(virq);
438 return 0;
439 }
440
441 return virq;
442}
443EXPORT_SYMBOL_GPL(irq_create_direct_mapping);
444
445/**
446 * irq_create_mapping() - Map a hardware interrupt into linux irq space
447 * @domain: domain owning this hardware interrupt or NULL for default domain
448 * @hwirq: hardware irq number in that domain space
449 *
450 * Only one mapping per hardware interrupt is permitted. Returns a linux
451 * irq number.
452 * If the sense/trigger is to be specified, set_irq_type() should be called
453 * on the number returned from that call.
454 */
455unsigned int irq_create_mapping(struct irq_domain *domain,
456 irq_hw_number_t hwirq)
457{
458 struct device_node *of_node;
459 int virq;
460
461 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
462
463 /* Look for default domain if nececssary */
464 if (domain == NULL)
465 domain = irq_default_domain;
466 if (domain == NULL) {
467 WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq);
468 return 0;
469 }
470 pr_debug("-> using domain @%p\n", domain);
471
472 of_node = irq_domain_get_of_node(domain);
473
474 /* Check if mapping already exists */
475 virq = irq_find_mapping(domain, hwirq);
476 if (virq) {
477 pr_debug("-> existing mapping on virq %d\n", virq);
478 return virq;
479 }
480
481 /* Allocate a virtual interrupt number */
482 virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node), NULL);
483 if (virq <= 0) {
484 pr_debug("-> virq allocation failed\n");
485 return 0;
486 }
487
488 if (irq_domain_associate(domain, virq, hwirq)) {
489 irq_free_desc(virq);
490 return 0;
491 }
492
493 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
494 hwirq, of_node_full_name(of_node), virq);
495
496 return virq;
497}
498EXPORT_SYMBOL_GPL(irq_create_mapping);
499
500/**
501 * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs
502 * @domain: domain owning the interrupt range
503 * @irq_base: beginning of linux IRQ range
504 * @hwirq_base: beginning of hardware IRQ range
505 * @count: Number of interrupts to map
506 *
507 * This routine is used for allocating and mapping a range of hardware
508 * irqs to linux irqs where the linux irq numbers are at pre-defined
509 * locations. For use by controllers that already have static mappings
510 * to insert in to the domain.
511 *
512 * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time
513 * domain insertion.
514 *
515 * 0 is returned upon success, while any failure to establish a static
516 * mapping is treated as an error.
517 */
518int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base,
519 irq_hw_number_t hwirq_base, int count)
520{
521 struct device_node *of_node;
522 int ret;
523
524 of_node = irq_domain_get_of_node(domain);
525 ret = irq_alloc_descs(irq_base, irq_base, count,
526 of_node_to_nid(of_node));
527 if (unlikely(ret < 0))
528 return ret;
529
530 irq_domain_associate_many(domain, irq_base, hwirq_base, count);
531 return 0;
532}
533EXPORT_SYMBOL_GPL(irq_create_strict_mappings);
534
535static int irq_domain_translate(struct irq_domain *d,
536 struct irq_fwspec *fwspec,
537 irq_hw_number_t *hwirq, unsigned int *type)
538{
539#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
540 if (d->ops->translate)
541 return d->ops->translate(d, fwspec, hwirq, type);
542#endif
543 if (d->ops->xlate)
544 return d->ops->xlate(d, to_of_node(fwspec->fwnode),
545 fwspec->param, fwspec->param_count,
546 hwirq, type);
547
548 /* If domain has no translation, then we assume interrupt line */
549 *hwirq = fwspec->param[0];
550 return 0;
551}
552
553static void of_phandle_args_to_fwspec(struct of_phandle_args *irq_data,
554 struct irq_fwspec *fwspec)
555{
556 int i;
557
558 fwspec->fwnode = irq_data->np ? &irq_data->np->fwnode : NULL;
559 fwspec->param_count = irq_data->args_count;
560
561 for (i = 0; i < irq_data->args_count; i++)
562 fwspec->param[i] = irq_data->args[i];
563}
564
565unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
566{
567 struct irq_domain *domain;
568 struct irq_data *irq_data;
569 irq_hw_number_t hwirq;
570 unsigned int type = IRQ_TYPE_NONE;
571 int virq;
572
573 if (fwspec->fwnode) {
574 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_WIRED);
575 if (!domain)
576 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_ANY);
577 } else {
578 domain = irq_default_domain;
579 }
580
581 if (!domain) {
582 pr_warn("no irq domain found for %s !\n",
583 of_node_full_name(to_of_node(fwspec->fwnode)));
584 return 0;
585 }
586
587 if (irq_domain_translate(domain, fwspec, &hwirq, &type))
588 return 0;
589
590 /*
591 * WARN if the irqchip returns a type with bits
592 * outside the sense mask set and clear these bits.
593 */
594 if (WARN_ON(type & ~IRQ_TYPE_SENSE_MASK))
595 type &= IRQ_TYPE_SENSE_MASK;
596
597 /*
598 * If we've already configured this interrupt,
599 * don't do it again, or hell will break loose.
600 */
601 virq = irq_find_mapping(domain, hwirq);
602 if (virq) {
603 /*
604 * If the trigger type is not specified or matches the
605 * current trigger type then we are done so return the
606 * interrupt number.
607 */
608 if (type == IRQ_TYPE_NONE || type == irq_get_trigger_type(virq))
609 return virq;
610
611 /*
612 * If the trigger type has not been set yet, then set
613 * it now and return the interrupt number.
614 */
615 if (irq_get_trigger_type(virq) == IRQ_TYPE_NONE) {
616 irq_data = irq_get_irq_data(virq);
617 if (!irq_data)
618 return 0;
619
620 irqd_set_trigger_type(irq_data, type);
621 return virq;
622 }
623
624 pr_warn("type mismatch, failed to map hwirq-%lu for %s!\n",
625 hwirq, of_node_full_name(to_of_node(fwspec->fwnode)));
626 return 0;
627 }
628
629 if (irq_domain_is_hierarchy(domain)) {
630 virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, fwspec);
631 if (virq <= 0)
632 return 0;
633 } else {
634 /* Create mapping */
635 virq = irq_create_mapping(domain, hwirq);
636 if (!virq)
637 return virq;
638 }
639
640 irq_data = irq_get_irq_data(virq);
641 if (!irq_data) {
642 if (irq_domain_is_hierarchy(domain))
643 irq_domain_free_irqs(virq, 1);
644 else
645 irq_dispose_mapping(virq);
646 return 0;
647 }
648
649 /* Store trigger type */
650 irqd_set_trigger_type(irq_data, type);
651
652 return virq;
653}
654EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping);
655
656unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data)
657{
658 struct irq_fwspec fwspec;
659
660 of_phandle_args_to_fwspec(irq_data, &fwspec);
661 return irq_create_fwspec_mapping(&fwspec);
662}
663EXPORT_SYMBOL_GPL(irq_create_of_mapping);
664
665/**
666 * irq_dispose_mapping() - Unmap an interrupt
667 * @virq: linux irq number of the interrupt to unmap
668 */
669void irq_dispose_mapping(unsigned int virq)
670{
671 struct irq_data *irq_data = irq_get_irq_data(virq);
672 struct irq_domain *domain;
673
674 if (!virq || !irq_data)
675 return;
676
677 domain = irq_data->domain;
678 if (WARN_ON(domain == NULL))
679 return;
680
681 if (irq_domain_is_hierarchy(domain)) {
682 irq_domain_free_irqs(virq, 1);
683 } else {
684 irq_domain_disassociate(domain, virq);
685 irq_free_desc(virq);
686 }
687}
688EXPORT_SYMBOL_GPL(irq_dispose_mapping);
689
690/**
691 * irq_find_mapping() - Find a linux irq from an hw irq number.
692 * @domain: domain owning this hardware interrupt
693 * @hwirq: hardware irq number in that domain space
694 */
695unsigned int irq_find_mapping(struct irq_domain *domain,
696 irq_hw_number_t hwirq)
697{
698 struct irq_data *data;
699
700 /* Look for default domain if nececssary */
701 if (domain == NULL)
702 domain = irq_default_domain;
703 if (domain == NULL)
704 return 0;
705
706 if (hwirq < domain->revmap_direct_max_irq) {
707 data = irq_domain_get_irq_data(domain, hwirq);
708 if (data && data->hwirq == hwirq)
709 return hwirq;
710 }
711
712 /* Check if the hwirq is in the linear revmap. */
713 if (hwirq < domain->revmap_size)
714 return domain->linear_revmap[hwirq];
715
716 rcu_read_lock();
717 data = radix_tree_lookup(&domain->revmap_tree, hwirq);
718 rcu_read_unlock();
719 return data ? data->irq : 0;
720}
721EXPORT_SYMBOL_GPL(irq_find_mapping);
722
723#ifdef CONFIG_IRQ_DOMAIN_DEBUG
724static int virq_debug_show(struct seq_file *m, void *private)
725{
726 unsigned long flags;
727 struct irq_desc *desc;
728 struct irq_domain *domain;
729 struct radix_tree_iter iter;
730 void *data, **slot;
731 int i;
732
733 seq_printf(m, " %-16s %-6s %-10s %-10s %s\n",
734 "name", "mapped", "linear-max", "direct-max", "devtree-node");
735 mutex_lock(&irq_domain_mutex);
736 list_for_each_entry(domain, &irq_domain_list, link) {
737 struct device_node *of_node;
738 int count = 0;
739 of_node = irq_domain_get_of_node(domain);
740 radix_tree_for_each_slot(slot, &domain->revmap_tree, &iter, 0)
741 count++;
742 seq_printf(m, "%c%-16s %6u %10u %10u %s\n",
743 domain == irq_default_domain ? '*' : ' ', domain->name,
744 domain->revmap_size + count, domain->revmap_size,
745 domain->revmap_direct_max_irq,
746 of_node ? of_node_full_name(of_node) : "");
747 }
748 mutex_unlock(&irq_domain_mutex);
749
750 seq_printf(m, "%-5s %-7s %-15s %-*s %6s %-14s %s\n", "irq", "hwirq",
751 "chip name", (int)(2 * sizeof(void *) + 2), "chip data",
752 "active", "type", "domain");
753
754 for (i = 1; i < nr_irqs; i++) {
755 desc = irq_to_desc(i);
756 if (!desc)
757 continue;
758
759 raw_spin_lock_irqsave(&desc->lock, flags);
760 domain = desc->irq_data.domain;
761
762 if (domain) {
763 struct irq_chip *chip;
764 int hwirq = desc->irq_data.hwirq;
765 bool direct;
766
767 seq_printf(m, "%5d ", i);
768 seq_printf(m, "0x%05x ", hwirq);
769
770 chip = irq_desc_get_chip(desc);
771 seq_printf(m, "%-15s ", (chip && chip->name) ? chip->name : "none");
772
773 data = irq_desc_get_chip_data(desc);
774 seq_printf(m, data ? "0x%p " : " %p ", data);
775
776 seq_printf(m, " %c ", (desc->action && desc->action->handler) ? '*' : ' ');
777 direct = (i == hwirq) && (i < domain->revmap_direct_max_irq);
778 seq_printf(m, "%6s%-8s ",
779 (hwirq < domain->revmap_size) ? "LINEAR" : "RADIX",
780 direct ? "(DIRECT)" : "");
781 seq_printf(m, "%s\n", desc->irq_data.domain->name);
782 }
783
784 raw_spin_unlock_irqrestore(&desc->lock, flags);
785 }
786
787 return 0;
788}
789
790static int virq_debug_open(struct inode *inode, struct file *file)
791{
792 return single_open(file, virq_debug_show, inode->i_private);
793}
794
795static const struct file_operations virq_debug_fops = {
796 .open = virq_debug_open,
797 .read = seq_read,
798 .llseek = seq_lseek,
799 .release = single_release,
800};
801
802static int __init irq_debugfs_init(void)
803{
804 if (debugfs_create_file("irq_domain_mapping", S_IRUGO, NULL,
805 NULL, &virq_debug_fops) == NULL)
806 return -ENOMEM;
807
808 return 0;
809}
810__initcall(irq_debugfs_init);
811#endif /* CONFIG_IRQ_DOMAIN_DEBUG */
812
813/**
814 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
815 *
816 * Device Tree IRQ specifier translation function which works with one cell
817 * bindings where the cell value maps directly to the hwirq number.
818 */
819int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
820 const u32 *intspec, unsigned int intsize,
821 unsigned long *out_hwirq, unsigned int *out_type)
822{
823 if (WARN_ON(intsize < 1))
824 return -EINVAL;
825 *out_hwirq = intspec[0];
826 *out_type = IRQ_TYPE_NONE;
827 return 0;
828}
829EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell);
830
831/**
832 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings
833 *
834 * Device Tree IRQ specifier translation function which works with two cell
835 * bindings where the cell values map directly to the hwirq number
836 * and linux irq flags.
837 */
838int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
839 const u32 *intspec, unsigned int intsize,
840 irq_hw_number_t *out_hwirq, unsigned int *out_type)
841{
842 if (WARN_ON(intsize < 2))
843 return -EINVAL;
844 *out_hwirq = intspec[0];
845 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
846 return 0;
847}
848EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell);
849
850/**
851 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings
852 *
853 * Device Tree IRQ specifier translation function which works with either one
854 * or two cell bindings where the cell values map directly to the hwirq number
855 * and linux irq flags.
856 *
857 * Note: don't use this function unless your interrupt controller explicitly
858 * supports both one and two cell bindings. For the majority of controllers
859 * the _onecell() or _twocell() variants above should be used.
860 */
861int irq_domain_xlate_onetwocell(struct irq_domain *d,
862 struct device_node *ctrlr,
863 const u32 *intspec, unsigned int intsize,
864 unsigned long *out_hwirq, unsigned int *out_type)
865{
866 if (WARN_ON(intsize < 1))
867 return -EINVAL;
868 *out_hwirq = intspec[0];
869 if (intsize > 1)
870 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
871 else
872 *out_type = IRQ_TYPE_NONE;
873 return 0;
874}
875EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell);
876
877const struct irq_domain_ops irq_domain_simple_ops = {
878 .xlate = irq_domain_xlate_onetwocell,
879};
880EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
881
882int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq,
883 int node, const struct cpumask *affinity)
884{
885 unsigned int hint;
886
887 if (virq >= 0) {
888 virq = __irq_alloc_descs(virq, virq, cnt, node, THIS_MODULE,
889 affinity);
890 } else {
891 hint = hwirq % nr_irqs;
892 if (hint == 0)
893 hint++;
894 virq = __irq_alloc_descs(-1, hint, cnt, node, THIS_MODULE,
895 affinity);
896 if (virq <= 0 && hint > 1) {
897 virq = __irq_alloc_descs(-1, 1, cnt, node, THIS_MODULE,
898 affinity);
899 }
900 }
901
902 return virq;
903}
904
905#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
906/**
907 * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy
908 * @parent: Parent irq domain to associate with the new domain
909 * @flags: Irq domain flags associated to the domain
910 * @size: Size of the domain. See below
911 * @fwnode: Optional fwnode of the interrupt controller
912 * @ops: Pointer to the interrupt domain callbacks
913 * @host_data: Controller private data pointer
914 *
915 * If @size is 0 a tree domain is created, otherwise a linear domain.
916 *
917 * If successful the parent is associated to the new domain and the
918 * domain flags are set.
919 * Returns pointer to IRQ domain, or NULL on failure.
920 */
921struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
922 unsigned int flags,
923 unsigned int size,
924 struct fwnode_handle *fwnode,
925 const struct irq_domain_ops *ops,
926 void *host_data)
927{
928 struct irq_domain *domain;
929
930 if (size)
931 domain = irq_domain_create_linear(fwnode, size, ops, host_data);
932 else
933 domain = irq_domain_create_tree(fwnode, ops, host_data);
934 if (domain) {
935 domain->parent = parent;
936 domain->flags |= flags;
937 }
938
939 return domain;
940}
941EXPORT_SYMBOL_GPL(irq_domain_create_hierarchy);
942
943static void irq_domain_insert_irq(int virq)
944{
945 struct irq_data *data;
946
947 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
948 struct irq_domain *domain = data->domain;
949 irq_hw_number_t hwirq = data->hwirq;
950
951 if (hwirq < domain->revmap_size) {
952 domain->linear_revmap[hwirq] = virq;
953 } else {
954 mutex_lock(&revmap_trees_mutex);
955 radix_tree_insert(&domain->revmap_tree, hwirq, data);
956 mutex_unlock(&revmap_trees_mutex);
957 }
958
959 /* If not already assigned, give the domain the chip's name */
960 if (!domain->name && data->chip)
961 domain->name = data->chip->name;
962 }
963
964 irq_clear_status_flags(virq, IRQ_NOREQUEST);
965}
966
967static void irq_domain_remove_irq(int virq)
968{
969 struct irq_data *data;
970
971 irq_set_status_flags(virq, IRQ_NOREQUEST);
972 irq_set_chip_and_handler(virq, NULL, NULL);
973 synchronize_irq(virq);
974 smp_mb();
975
976 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
977 struct irq_domain *domain = data->domain;
978 irq_hw_number_t hwirq = data->hwirq;
979
980 if (hwirq < domain->revmap_size) {
981 domain->linear_revmap[hwirq] = 0;
982 } else {
983 mutex_lock(&revmap_trees_mutex);
984 radix_tree_delete(&domain->revmap_tree, hwirq);
985 mutex_unlock(&revmap_trees_mutex);
986 }
987 }
988}
989
990static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain,
991 struct irq_data *child)
992{
993 struct irq_data *irq_data;
994
995 irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL,
996 irq_data_get_node(child));
997 if (irq_data) {
998 child->parent_data = irq_data;
999 irq_data->irq = child->irq;
1000 irq_data->common = child->common;
1001 irq_data->domain = domain;
1002 }
1003
1004 return irq_data;
1005}
1006
1007static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs)
1008{
1009 struct irq_data *irq_data, *tmp;
1010 int i;
1011
1012 for (i = 0; i < nr_irqs; i++) {
1013 irq_data = irq_get_irq_data(virq + i);
1014 tmp = irq_data->parent_data;
1015 irq_data->parent_data = NULL;
1016 irq_data->domain = NULL;
1017
1018 while (tmp) {
1019 irq_data = tmp;
1020 tmp = tmp->parent_data;
1021 kfree(irq_data);
1022 }
1023 }
1024}
1025
1026static int irq_domain_alloc_irq_data(struct irq_domain *domain,
1027 unsigned int virq, unsigned int nr_irqs)
1028{
1029 struct irq_data *irq_data;
1030 struct irq_domain *parent;
1031 int i;
1032
1033 /* The outermost irq_data is embedded in struct irq_desc */
1034 for (i = 0; i < nr_irqs; i++) {
1035 irq_data = irq_get_irq_data(virq + i);
1036 irq_data->domain = domain;
1037
1038 for (parent = domain->parent; parent; parent = parent->parent) {
1039 irq_data = irq_domain_insert_irq_data(parent, irq_data);
1040 if (!irq_data) {
1041 irq_domain_free_irq_data(virq, i + 1);
1042 return -ENOMEM;
1043 }
1044 }
1045 }
1046
1047 return 0;
1048}
1049
1050/**
1051 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1052 * @domain: domain to match
1053 * @virq: IRQ number to get irq_data
1054 */
1055struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1056 unsigned int virq)
1057{
1058 struct irq_data *irq_data;
1059
1060 for (irq_data = irq_get_irq_data(virq); irq_data;
1061 irq_data = irq_data->parent_data)
1062 if (irq_data->domain == domain)
1063 return irq_data;
1064
1065 return NULL;
1066}
1067EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1068
1069/**
1070 * irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain
1071 * @domain: Interrupt domain to match
1072 * @virq: IRQ number
1073 * @hwirq: The hwirq number
1074 * @chip: The associated interrupt chip
1075 * @chip_data: The associated chip data
1076 */
1077int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq,
1078 irq_hw_number_t hwirq, struct irq_chip *chip,
1079 void *chip_data)
1080{
1081 struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq);
1082
1083 if (!irq_data)
1084 return -ENOENT;
1085
1086 irq_data->hwirq = hwirq;
1087 irq_data->chip = chip ? chip : &no_irq_chip;
1088 irq_data->chip_data = chip_data;
1089
1090 return 0;
1091}
1092EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip);
1093
1094/**
1095 * irq_domain_set_info - Set the complete data for a @virq in @domain
1096 * @domain: Interrupt domain to match
1097 * @virq: IRQ number
1098 * @hwirq: The hardware interrupt number
1099 * @chip: The associated interrupt chip
1100 * @chip_data: The associated interrupt chip data
1101 * @handler: The interrupt flow handler
1102 * @handler_data: The interrupt flow handler data
1103 * @handler_name: The interrupt handler name
1104 */
1105void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1106 irq_hw_number_t hwirq, struct irq_chip *chip,
1107 void *chip_data, irq_flow_handler_t handler,
1108 void *handler_data, const char *handler_name)
1109{
1110 irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data);
1111 __irq_set_handler(virq, handler, 0, handler_name);
1112 irq_set_handler_data(virq, handler_data);
1113}
1114EXPORT_SYMBOL(irq_domain_set_info);
1115
1116/**
1117 * irq_domain_reset_irq_data - Clear hwirq, chip and chip_data in @irq_data
1118 * @irq_data: The pointer to irq_data
1119 */
1120void irq_domain_reset_irq_data(struct irq_data *irq_data)
1121{
1122 irq_data->hwirq = 0;
1123 irq_data->chip = &no_irq_chip;
1124 irq_data->chip_data = NULL;
1125}
1126EXPORT_SYMBOL_GPL(irq_domain_reset_irq_data);
1127
1128/**
1129 * irq_domain_free_irqs_common - Clear irq_data and free the parent
1130 * @domain: Interrupt domain to match
1131 * @virq: IRQ number to start with
1132 * @nr_irqs: The number of irqs to free
1133 */
1134void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq,
1135 unsigned int nr_irqs)
1136{
1137 struct irq_data *irq_data;
1138 int i;
1139
1140 for (i = 0; i < nr_irqs; i++) {
1141 irq_data = irq_domain_get_irq_data(domain, virq + i);
1142 if (irq_data)
1143 irq_domain_reset_irq_data(irq_data);
1144 }
1145 irq_domain_free_irqs_parent(domain, virq, nr_irqs);
1146}
1147EXPORT_SYMBOL_GPL(irq_domain_free_irqs_common);
1148
1149/**
1150 * irq_domain_free_irqs_top - Clear handler and handler data, clear irqdata and free parent
1151 * @domain: Interrupt domain to match
1152 * @virq: IRQ number to start with
1153 * @nr_irqs: The number of irqs to free
1154 */
1155void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq,
1156 unsigned int nr_irqs)
1157{
1158 int i;
1159
1160 for (i = 0; i < nr_irqs; i++) {
1161 irq_set_handler_data(virq + i, NULL);
1162 irq_set_handler(virq + i, NULL);
1163 }
1164 irq_domain_free_irqs_common(domain, virq, nr_irqs);
1165}
1166
1167static bool irq_domain_is_auto_recursive(struct irq_domain *domain)
1168{
1169 return domain->flags & IRQ_DOMAIN_FLAG_AUTO_RECURSIVE;
1170}
1171
1172static void irq_domain_free_irqs_recursive(struct irq_domain *domain,
1173 unsigned int irq_base,
1174 unsigned int nr_irqs)
1175{
1176 domain->ops->free(domain, irq_base, nr_irqs);
1177 if (irq_domain_is_auto_recursive(domain)) {
1178 BUG_ON(!domain->parent);
1179 irq_domain_free_irqs_recursive(domain->parent, irq_base,
1180 nr_irqs);
1181 }
1182}
1183
1184int irq_domain_alloc_irqs_recursive(struct irq_domain *domain,
1185 unsigned int irq_base,
1186 unsigned int nr_irqs, void *arg)
1187{
1188 int ret = 0;
1189 struct irq_domain *parent = domain->parent;
1190 bool recursive = irq_domain_is_auto_recursive(domain);
1191
1192 BUG_ON(recursive && !parent);
1193 if (recursive)
1194 ret = irq_domain_alloc_irqs_recursive(parent, irq_base,
1195 nr_irqs, arg);
1196 if (ret < 0)
1197 return ret;
1198
1199 ret = domain->ops->alloc(domain, irq_base, nr_irqs, arg);
1200 if (ret < 0 && recursive)
1201 irq_domain_free_irqs_recursive(parent, irq_base, nr_irqs);
1202
1203 return ret;
1204}
1205
1206/**
1207 * __irq_domain_alloc_irqs - Allocate IRQs from domain
1208 * @domain: domain to allocate from
1209 * @irq_base: allocate specified IRQ nubmer if irq_base >= 0
1210 * @nr_irqs: number of IRQs to allocate
1211 * @node: NUMA node id for memory allocation
1212 * @arg: domain specific argument
1213 * @realloc: IRQ descriptors have already been allocated if true
1214 * @affinity: Optional irq affinity mask for multiqueue devices
1215 *
1216 * Allocate IRQ numbers and initialized all data structures to support
1217 * hierarchy IRQ domains.
1218 * Parameter @realloc is mainly to support legacy IRQs.
1219 * Returns error code or allocated IRQ number
1220 *
1221 * The whole process to setup an IRQ has been split into two steps.
1222 * The first step, __irq_domain_alloc_irqs(), is to allocate IRQ
1223 * descriptor and required hardware resources. The second step,
1224 * irq_domain_activate_irq(), is to program hardwares with preallocated
1225 * resources. In this way, it's easier to rollback when failing to
1226 * allocate resources.
1227 */
1228int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
1229 unsigned int nr_irqs, int node, void *arg,
1230 bool realloc, const struct cpumask *affinity)
1231{
1232 int i, ret, virq;
1233
1234 if (domain == NULL) {
1235 domain = irq_default_domain;
1236 if (WARN(!domain, "domain is NULL; cannot allocate IRQ\n"))
1237 return -EINVAL;
1238 }
1239
1240 if (!domain->ops->alloc) {
1241 pr_debug("domain->ops->alloc() is NULL\n");
1242 return -ENOSYS;
1243 }
1244
1245 if (realloc && irq_base >= 0) {
1246 virq = irq_base;
1247 } else {
1248 virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node,
1249 affinity);
1250 if (virq < 0) {
1251 pr_debug("cannot allocate IRQ(base %d, count %d)\n",
1252 irq_base, nr_irqs);
1253 return virq;
1254 }
1255 }
1256
1257 if (irq_domain_alloc_irq_data(domain, virq, nr_irqs)) {
1258 pr_debug("cannot allocate memory for IRQ%d\n", virq);
1259 ret = -ENOMEM;
1260 goto out_free_desc;
1261 }
1262
1263 mutex_lock(&irq_domain_mutex);
1264 ret = irq_domain_alloc_irqs_recursive(domain, virq, nr_irqs, arg);
1265 if (ret < 0) {
1266 mutex_unlock(&irq_domain_mutex);
1267 goto out_free_irq_data;
1268 }
1269 for (i = 0; i < nr_irqs; i++)
1270 irq_domain_insert_irq(virq + i);
1271 mutex_unlock(&irq_domain_mutex);
1272
1273 return virq;
1274
1275out_free_irq_data:
1276 irq_domain_free_irq_data(virq, nr_irqs);
1277out_free_desc:
1278 irq_free_descs(virq, nr_irqs);
1279 return ret;
1280}
1281
1282/**
1283 * irq_domain_free_irqs - Free IRQ number and associated data structures
1284 * @virq: base IRQ number
1285 * @nr_irqs: number of IRQs to free
1286 */
1287void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs)
1288{
1289 struct irq_data *data = irq_get_irq_data(virq);
1290 int i;
1291
1292 if (WARN(!data || !data->domain || !data->domain->ops->free,
1293 "NULL pointer, cannot free irq\n"))
1294 return;
1295
1296 mutex_lock(&irq_domain_mutex);
1297 for (i = 0; i < nr_irqs; i++)
1298 irq_domain_remove_irq(virq + i);
1299 irq_domain_free_irqs_recursive(data->domain, virq, nr_irqs);
1300 mutex_unlock(&irq_domain_mutex);
1301
1302 irq_domain_free_irq_data(virq, nr_irqs);
1303 irq_free_descs(virq, nr_irqs);
1304}
1305
1306/**
1307 * irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain
1308 * @irq_base: Base IRQ number
1309 * @nr_irqs: Number of IRQs to allocate
1310 * @arg: Allocation data (arch/domain specific)
1311 *
1312 * Check whether the domain has been setup recursive. If not allocate
1313 * through the parent domain.
1314 */
1315int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
1316 unsigned int irq_base, unsigned int nr_irqs,
1317 void *arg)
1318{
1319 /* irq_domain_alloc_irqs_recursive() has called parent's alloc() */
1320 if (irq_domain_is_auto_recursive(domain))
1321 return 0;
1322
1323 domain = domain->parent;
1324 if (domain)
1325 return irq_domain_alloc_irqs_recursive(domain, irq_base,
1326 nr_irqs, arg);
1327 return -ENOSYS;
1328}
1329EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent);
1330
1331/**
1332 * irq_domain_free_irqs_parent - Free interrupts from parent domain
1333 * @irq_base: Base IRQ number
1334 * @nr_irqs: Number of IRQs to free
1335 *
1336 * Check whether the domain has been setup recursive. If not free
1337 * through the parent domain.
1338 */
1339void irq_domain_free_irqs_parent(struct irq_domain *domain,
1340 unsigned int irq_base, unsigned int nr_irqs)
1341{
1342 /* irq_domain_free_irqs_recursive() will call parent's free */
1343 if (!irq_domain_is_auto_recursive(domain) && domain->parent)
1344 irq_domain_free_irqs_recursive(domain->parent, irq_base,
1345 nr_irqs);
1346}
1347EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent);
1348
1349static void __irq_domain_activate_irq(struct irq_data *irq_data)
1350{
1351 if (irq_data && irq_data->domain) {
1352 struct irq_domain *domain = irq_data->domain;
1353
1354 if (irq_data->parent_data)
1355 __irq_domain_activate_irq(irq_data->parent_data);
1356 if (domain->ops->activate)
1357 domain->ops->activate(domain, irq_data);
1358 }
1359}
1360
1361static void __irq_domain_deactivate_irq(struct irq_data *irq_data)
1362{
1363 if (irq_data && irq_data->domain) {
1364 struct irq_domain *domain = irq_data->domain;
1365
1366 if (domain->ops->deactivate)
1367 domain->ops->deactivate(domain, irq_data);
1368 if (irq_data->parent_data)
1369 __irq_domain_deactivate_irq(irq_data->parent_data);
1370 }
1371}
1372
1373/**
1374 * irq_domain_activate_irq - Call domain_ops->activate recursively to activate
1375 * interrupt
1376 * @irq_data: outermost irq_data associated with interrupt
1377 *
1378 * This is the second step to call domain_ops->activate to program interrupt
1379 * controllers, so the interrupt could actually get delivered.
1380 */
1381void irq_domain_activate_irq(struct irq_data *irq_data)
1382{
1383 if (!irqd_is_activated(irq_data)) {
1384 __irq_domain_activate_irq(irq_data);
1385 irqd_set_activated(irq_data);
1386 }
1387}
1388
1389/**
1390 * irq_domain_deactivate_irq - Call domain_ops->deactivate recursively to
1391 * deactivate interrupt
1392 * @irq_data: outermost irq_data associated with interrupt
1393 *
1394 * It calls domain_ops->deactivate to program interrupt controllers to disable
1395 * interrupt delivery.
1396 */
1397void irq_domain_deactivate_irq(struct irq_data *irq_data)
1398{
1399 if (irqd_is_activated(irq_data)) {
1400 __irq_domain_deactivate_irq(irq_data);
1401 irqd_clr_activated(irq_data);
1402 }
1403}
1404
1405static void irq_domain_check_hierarchy(struct irq_domain *domain)
1406{
1407 /* Hierarchy irq_domains must implement callback alloc() */
1408 if (domain->ops->alloc)
1409 domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY;
1410}
1411#else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1412/**
1413 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1414 * @domain: domain to match
1415 * @virq: IRQ number to get irq_data
1416 */
1417struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1418 unsigned int virq)
1419{
1420 struct irq_data *irq_data = irq_get_irq_data(virq);
1421
1422 return (irq_data && irq_data->domain == domain) ? irq_data : NULL;
1423}
1424EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1425
1426/**
1427 * irq_domain_set_info - Set the complete data for a @virq in @domain
1428 * @domain: Interrupt domain to match
1429 * @virq: IRQ number
1430 * @hwirq: The hardware interrupt number
1431 * @chip: The associated interrupt chip
1432 * @chip_data: The associated interrupt chip data
1433 * @handler: The interrupt flow handler
1434 * @handler_data: The interrupt flow handler data
1435 * @handler_name: The interrupt handler name
1436 */
1437void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1438 irq_hw_number_t hwirq, struct irq_chip *chip,
1439 void *chip_data, irq_flow_handler_t handler,
1440 void *handler_data, const char *handler_name)
1441{
1442 irq_set_chip_and_handler_name(virq, chip, handler, handler_name);
1443 irq_set_chip_data(virq, chip_data);
1444 irq_set_handler_data(virq, handler_data);
1445}
1446
1447static void irq_domain_check_hierarchy(struct irq_domain *domain)
1448{
1449}
1450#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1// SPDX-License-Identifier: GPL-2.0
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/**
58 * __irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for
59 * identifying an irq domain
60 * @type: Type of irqchip_fwnode. See linux/irqdomain.h
61 * @id: Optional user provided id if name != NULL
62 * @name: Optional user provided domain name
63 * @pa: Optional user-provided physical address
64 *
65 * Allocate a struct irqchip_fwid, and return a pointer to the embedded
66 * fwnode_handle (or NULL on failure).
67 *
68 * Note: The types IRQCHIP_FWNODE_NAMED and IRQCHIP_FWNODE_NAMED_ID are
69 * solely to transport name information to irqdomain creation code. The
70 * node is not stored. For other types the pointer is kept in the irq
71 * domain struct.
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 * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle
110 *
111 * Free a fwnode_handle allocated with irq_domain_alloc_fwnode.
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
126/**
127 * __irq_domain_add() - Allocate a new irq_domain data structure
128 * @fwnode: firmware node for the interrupt controller
129 * @size: Size of linear map; 0 for radix mapping only
130 * @hwirq_max: Maximum number of interrupts supported by controller
131 * @direct_max: Maximum value of direct maps; Use ~0 for no limit; 0 for no
132 * direct mapping
133 * @ops: domain callbacks
134 * @host_data: Controller private data pointer
135 *
136 * Allocates and initializes an irq_domain structure.
137 * Returns pointer to IRQ domain, or NULL on failure.
138 */
139struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
140 irq_hw_number_t hwirq_max, int direct_max,
141 const struct irq_domain_ops *ops,
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 * fwnode paths contain '/', which debugfs is legitimately
183 * unhappy about. Replace them with ':', which does
184 * the trick and is not as offensive as '\'...
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 /* Fill structure */
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/**
241 * irq_domain_remove() - Remove an irq domain.
242 * @domain: domain to remove
243 *
244 * This routine is used to remove an irq domain. The caller must ensure
245 * that all mappings within the domain have been disposed of prior to
246 * use, depending on the revmap type.
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 * If the going away domain is the default one, reset it.
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
307/**
308 * irq_domain_create_simple() - Register an irq_domain and optionally map a range of irqs
309 * @fwnode: firmware node for the interrupt controller
310 * @size: total number of irqs in mapping
311 * @first_irq: first number of irq block assigned to the domain,
312 * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then
313 * pre-map all of the irqs in the domain to virqs starting at first_irq.
314 * @ops: domain callbacks
315 * @host_data: Controller private data pointer
316 *
317 * Allocates an irq_domain, and optionally if first_irq is positive then also
318 * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq.
319 *
320 * This is intended to implement the expected behaviour for most
321 * interrupt controllers. If device tree is used, then first_irq will be 0 and
322 * irqs get mapped dynamically on the fly. However, if the controller requires
323 * static virq assignments (non-DT boot) then it will set that up correctly.
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 /* attempt to allocated irq_descs */
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
353/**
354 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain.
355 * @of_node: pointer to interrupt controller's device tree node.
356 * @size: total number of irqs in legacy mapping
357 * @first_irq: first number of irq block assigned to the domain
358 * @first_hwirq: first hwirq number to use for the translation. Should normally
359 * be '0', but a positive integer can be used if the effective
360 * hwirqs numbering does not begin at zero.
361 * @ops: map/unmap domain callbacks
362 * @host_data: Controller private data pointer
363 *
364 * Note: the map() callback will be called before this function returns
365 * for all legacy interrupts except 0 (which is always the invalid irq for
366 * a legacy controller).
367 */
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 * irq_find_matching_fwspec() - Locates a domain for a given fwspec
399 * @fwspec: FW specifier for an interrupt
400 * @bus_token: domain-specific data
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
409 /* We might want to match the legacy controller last since
410 * it might potentially be set to match all interrupts in
411 * the absence of a device node. This isn't a problem so far
412 * yet though...
413 *
414 * bus_token == DOMAIN_BUS_ANY matches any domain, any other
415 * values must generate an exact match for the domain to be
416 * selected.
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
439/**
440 * irq_domain_check_msi_remap - Check whether all MSI irq domains implement
441 * IRQ remapping
442 *
443 * Return: false if any MSI irq domain does not support IRQ remapping,
444 * true otherwise (including if there is no MSI irq domain)
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
464/**
465 * irq_set_default_host() - Set a "default" irq domain
466 * @domain: default domain pointer
467 *
468 * For convenience, it's possible to set a "default" domain that will be used
469 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
470 * platforms that want to manipulate a few hard coded interrupt numbers that
471 * aren't properly represented in the device-tree.
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
481/**
482 * irq_get_default_host() - Retrieve the "default" irq domain
483 *
484 * Returns: the default domain, if any.
485 *
486 * Modern code should never use this. This should only be used on
487 * systems that cannot implement a firmware->fwnode mapping (which
488 * both DT and ACPI provide).
489 */
490struct irq_domain *irq_get_default_host(void)
491{
492 return irq_default_domain;
493}
494
495static bool irq_domain_is_nomap(struct irq_domain *domain)
496{
497 return IS_ENABLED(CONFIG_IRQ_DOMAIN_NOMAP) &&
498 (domain->flags & IRQ_DOMAIN_FLAG_NO_MAP);
499}
500
501static void irq_domain_clear_mapping(struct irq_domain *domain,
502 irq_hw_number_t hwirq)
503{
504 if (irq_domain_is_nomap(domain))
505 return;
506
507 mutex_lock(&domain->revmap_mutex);
508 if (hwirq < domain->revmap_size)
509 rcu_assign_pointer(domain->revmap[hwirq], NULL);
510 else
511 radix_tree_delete(&domain->revmap_tree, hwirq);
512 mutex_unlock(&domain->revmap_mutex);
513}
514
515static void irq_domain_set_mapping(struct irq_domain *domain,
516 irq_hw_number_t hwirq,
517 struct irq_data *irq_data)
518{
519 if (irq_domain_is_nomap(domain))
520 return;
521
522 mutex_lock(&domain->revmap_mutex);
523 if (hwirq < domain->revmap_size)
524 rcu_assign_pointer(domain->revmap[hwirq], irq_data);
525 else
526 radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
527 mutex_unlock(&domain->revmap_mutex);
528}
529
530static void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
531{
532 struct irq_data *irq_data = irq_get_irq_data(irq);
533 irq_hw_number_t hwirq;
534
535 if (WARN(!irq_data || irq_data->domain != domain,
536 "virq%i doesn't exist; cannot disassociate\n", irq))
537 return;
538
539 hwirq = irq_data->hwirq;
540 irq_set_status_flags(irq, IRQ_NOREQUEST);
541
542 /* remove chip and handler */
543 irq_set_chip_and_handler(irq, NULL, NULL);
544
545 /* Make sure it's completed */
546 synchronize_irq(irq);
547
548 /* Tell the PIC about it */
549 if (domain->ops->unmap)
550 domain->ops->unmap(domain, irq);
551 smp_mb();
552
553 irq_data->domain = NULL;
554 irq_data->hwirq = 0;
555 domain->mapcount--;
556
557 /* Clear reverse map for this hwirq */
558 irq_domain_clear_mapping(domain, hwirq);
559}
560
561int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
562 irq_hw_number_t hwirq)
563{
564 struct irq_data *irq_data = irq_get_irq_data(virq);
565 int ret;
566
567 if (WARN(hwirq >= domain->hwirq_max,
568 "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name))
569 return -EINVAL;
570 if (WARN(!irq_data, "error: virq%i is not allocated", virq))
571 return -EINVAL;
572 if (WARN(irq_data->domain, "error: virq%i is already associated", virq))
573 return -EINVAL;
574
575 mutex_lock(&irq_domain_mutex);
576 irq_data->hwirq = hwirq;
577 irq_data->domain = domain;
578 if (domain->ops->map) {
579 ret = domain->ops->map(domain, virq, hwirq);
580 if (ret != 0) {
581 /*
582 * If map() returns -EPERM, this interrupt is protected
583 * by the firmware or some other service and shall not
584 * be mapped. Don't bother telling the user about it.
585 */
586 if (ret != -EPERM) {
587 pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n",
588 domain->name, hwirq, virq, ret);
589 }
590 irq_data->domain = NULL;
591 irq_data->hwirq = 0;
592 mutex_unlock(&irq_domain_mutex);
593 return ret;
594 }
595
596 /* If not already assigned, give the domain the chip's name */
597 if (!domain->name && irq_data->chip)
598 domain->name = irq_data->chip->name;
599 }
600
601 domain->mapcount++;
602 irq_domain_set_mapping(domain, hwirq, irq_data);
603 mutex_unlock(&irq_domain_mutex);
604
605 irq_clear_status_flags(virq, IRQ_NOREQUEST);
606
607 return 0;
608}
609EXPORT_SYMBOL_GPL(irq_domain_associate);
610
611void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
612 irq_hw_number_t hwirq_base, int count)
613{
614 struct device_node *of_node;
615 int i;
616
617 of_node = irq_domain_get_of_node(domain);
618 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
619 of_node_full_name(of_node), irq_base, (int)hwirq_base, count);
620
621 for (i = 0; i < count; i++) {
622 irq_domain_associate(domain, irq_base + i, hwirq_base + i);
623 }
624}
625EXPORT_SYMBOL_GPL(irq_domain_associate_many);
626
627#ifdef CONFIG_IRQ_DOMAIN_NOMAP
628/**
629 * irq_create_direct_mapping() - Allocate an irq for direct mapping
630 * @domain: domain to allocate the irq for or NULL for default domain
631 *
632 * This routine is used for irq controllers which can choose the hardware
633 * interrupt numbers they generate. In such a case it's simplest to use
634 * the linux irq as the hardware interrupt number. It still uses the linear
635 * or radix tree to store the mapping, but the irq controller can optimize
636 * the revmap path by using the hwirq directly.
637 */
638unsigned int irq_create_direct_mapping(struct irq_domain *domain)
639{
640 struct device_node *of_node;
641 unsigned int virq;
642
643 if (domain == NULL)
644 domain = irq_default_domain;
645
646 of_node = irq_domain_get_of_node(domain);
647 virq = irq_alloc_desc_from(1, of_node_to_nid(of_node));
648 if (!virq) {
649 pr_debug("create_direct virq allocation failed\n");
650 return 0;
651 }
652 if (virq >= domain->revmap_size) {
653 pr_err("ERROR: no free irqs available below %i maximum\n",
654 domain->revmap_size);
655 irq_free_desc(virq);
656 return 0;
657 }
658 pr_debug("create_direct obtained virq %d\n", virq);
659
660 if (irq_domain_associate(domain, virq, virq)) {
661 irq_free_desc(virq);
662 return 0;
663 }
664
665 return virq;
666}
667EXPORT_SYMBOL_GPL(irq_create_direct_mapping);
668#endif
669
670/**
671 * irq_create_mapping_affinity() - Map a hardware interrupt into linux irq space
672 * @domain: domain owning this hardware interrupt or NULL for default domain
673 * @hwirq: hardware irq number in that domain space
674 * @affinity: irq affinity
675 *
676 * Only one mapping per hardware interrupt is permitted. Returns a linux
677 * irq number.
678 * If the sense/trigger is to be specified, set_irq_type() should be called
679 * on the number returned from that call.
680 */
681unsigned int irq_create_mapping_affinity(struct irq_domain *domain,
682 irq_hw_number_t hwirq,
683 const struct irq_affinity_desc *affinity)
684{
685 struct device_node *of_node;
686 int virq;
687
688 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
689
690 /* Look for default domain if necessary */
691 if (domain == NULL)
692 domain = irq_default_domain;
693 if (domain == NULL) {
694 WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq);
695 return 0;
696 }
697 pr_debug("-> using domain @%p\n", domain);
698
699 of_node = irq_domain_get_of_node(domain);
700
701 /* Check if mapping already exists */
702 virq = irq_find_mapping(domain, hwirq);
703 if (virq) {
704 pr_debug("-> existing mapping on virq %d\n", virq);
705 return virq;
706 }
707
708 /* Allocate a virtual interrupt number */
709 virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node),
710 affinity);
711 if (virq <= 0) {
712 pr_debug("-> virq allocation failed\n");
713 return 0;
714 }
715
716 if (irq_domain_associate(domain, virq, hwirq)) {
717 irq_free_desc(virq);
718 return 0;
719 }
720
721 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
722 hwirq, of_node_full_name(of_node), virq);
723
724 return virq;
725}
726EXPORT_SYMBOL_GPL(irq_create_mapping_affinity);
727
728static int irq_domain_translate(struct irq_domain *d,
729 struct irq_fwspec *fwspec,
730 irq_hw_number_t *hwirq, unsigned int *type)
731{
732#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
733 if (d->ops->translate)
734 return d->ops->translate(d, fwspec, hwirq, type);
735#endif
736 if (d->ops->xlate)
737 return d->ops->xlate(d, to_of_node(fwspec->fwnode),
738 fwspec->param, fwspec->param_count,
739 hwirq, type);
740
741 /* If domain has no translation, then we assume interrupt line */
742 *hwirq = fwspec->param[0];
743 return 0;
744}
745
746static void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,
747 unsigned int count,
748 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}
758
759unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
760{
761 struct irq_domain *domain;
762 struct irq_data *irq_data;
763 irq_hw_number_t hwirq;
764 unsigned int type = IRQ_TYPE_NONE;
765 int virq;
766
767 if (fwspec->fwnode) {
768 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_WIRED);
769 if (!domain)
770 domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_ANY);
771 } else {
772 domain = irq_default_domain;
773 }
774
775 if (!domain) {
776 pr_warn("no irq domain found for %s !\n",
777 of_node_full_name(to_of_node(fwspec->fwnode)));
778 return 0;
779 }
780
781 if (irq_domain_translate(domain, fwspec, &hwirq, &type))
782 return 0;
783
784 /*
785 * WARN if the irqchip returns a type with bits
786 * outside the sense mask set and clear these bits.
787 */
788 if (WARN_ON(type & ~IRQ_TYPE_SENSE_MASK))
789 type &= IRQ_TYPE_SENSE_MASK;
790
791 /*
792 * If we've already configured this interrupt,
793 * don't do it again, or hell will break loose.
794 */
795 virq = irq_find_mapping(domain, hwirq);
796 if (virq) {
797 /*
798 * If the trigger type is not specified or matches the
799 * current trigger type then we are done so return the
800 * interrupt number.
801 */
802 if (type == IRQ_TYPE_NONE || type == irq_get_trigger_type(virq))
803 return virq;
804
805 /*
806 * If the trigger type has not been set yet, then set
807 * it now and return the interrupt number.
808 */
809 if (irq_get_trigger_type(virq) == IRQ_TYPE_NONE) {
810 irq_data = irq_get_irq_data(virq);
811 if (!irq_data)
812 return 0;
813
814 irqd_set_trigger_type(irq_data, type);
815 return virq;
816 }
817
818 pr_warn("type mismatch, failed to map hwirq-%lu for %s!\n",
819 hwirq, of_node_full_name(to_of_node(fwspec->fwnode)));
820 return 0;
821 }
822
823 if (irq_domain_is_hierarchy(domain)) {
824 virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, fwspec);
825 if (virq <= 0)
826 return 0;
827 } else {
828 /* Create mapping */
829 virq = irq_create_mapping(domain, hwirq);
830 if (!virq)
831 return virq;
832 }
833
834 irq_data = irq_get_irq_data(virq);
835 if (!irq_data) {
836 if (irq_domain_is_hierarchy(domain))
837 irq_domain_free_irqs(virq, 1);
838 else
839 irq_dispose_mapping(virq);
840 return 0;
841 }
842
843 /* Store trigger type */
844 irqd_set_trigger_type(irq_data, type);
845
846 return virq;
847}
848EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping);
849
850unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data)
851{
852 struct irq_fwspec fwspec;
853
854 of_phandle_args_to_fwspec(irq_data->np, irq_data->args,
855 irq_data->args_count, &fwspec);
856
857 return irq_create_fwspec_mapping(&fwspec);
858}
859EXPORT_SYMBOL_GPL(irq_create_of_mapping);
860
861/**
862 * irq_dispose_mapping() - Unmap an interrupt
863 * @virq: linux irq number of the interrupt to unmap
864 */
865void irq_dispose_mapping(unsigned int virq)
866{
867 struct irq_data *irq_data = irq_get_irq_data(virq);
868 struct irq_domain *domain;
869
870 if (!virq || !irq_data)
871 return;
872
873 domain = irq_data->domain;
874 if (WARN_ON(domain == NULL))
875 return;
876
877 if (irq_domain_is_hierarchy(domain)) {
878 irq_domain_free_irqs(virq, 1);
879 } else {
880 irq_domain_disassociate(domain, virq);
881 irq_free_desc(virq);
882 }
883}
884EXPORT_SYMBOL_GPL(irq_dispose_mapping);
885
886/**
887 * __irq_resolve_mapping() - Find a linux irq from a hw irq number.
888 * @domain: domain owning this hardware interrupt
889 * @hwirq: hardware irq number in that domain space
890 * @irq: optional pointer to return the Linux irq if required
891 *
892 * Returns the interrupt descriptor.
893 */
894struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain,
895 irq_hw_number_t hwirq,
896 unsigned int *irq)
897{
898 struct irq_desc *desc = NULL;
899 struct irq_data *data;
900
901 /* Look for default domain if necessary */
902 if (domain == NULL)
903 domain = irq_default_domain;
904 if (domain == NULL)
905 return desc;
906
907 if (irq_domain_is_nomap(domain)) {
908 if (hwirq < domain->revmap_size) {
909 data = irq_domain_get_irq_data(domain, hwirq);
910 if (data && data->hwirq == hwirq)
911 desc = irq_data_to_desc(data);
912 }
913
914 return desc;
915 }
916
917 rcu_read_lock();
918 /* Check if the hwirq is in the linear revmap. */
919 if (hwirq < domain->revmap_size)
920 data = rcu_dereference(domain->revmap[hwirq]);
921 else
922 data = radix_tree_lookup(&domain->revmap_tree, hwirq);
923
924 if (likely(data)) {
925 desc = irq_data_to_desc(data);
926 if (irq)
927 *irq = data->irq;
928 }
929
930 rcu_read_unlock();
931 return desc;
932}
933EXPORT_SYMBOL_GPL(__irq_resolve_mapping);
934
935/**
936 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
937 *
938 * Device Tree IRQ specifier translation function which works with one cell
939 * bindings where the cell value maps directly to the hwirq number.
940 */
941int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
942 const u32 *intspec, unsigned int intsize,
943 unsigned long *out_hwirq, unsigned int *out_type)
944{
945 if (WARN_ON(intsize < 1))
946 return -EINVAL;
947 *out_hwirq = intspec[0];
948 *out_type = IRQ_TYPE_NONE;
949 return 0;
950}
951EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell);
952
953/**
954 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings
955 *
956 * Device Tree IRQ specifier translation function which works with two cell
957 * bindings where the cell values map directly to the hwirq number
958 * and linux irq flags.
959 */
960int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
961 const u32 *intspec, unsigned int intsize,
962 irq_hw_number_t *out_hwirq, unsigned int *out_type)
963{
964 struct irq_fwspec fwspec;
965
966 of_phandle_args_to_fwspec(ctrlr, intspec, intsize, &fwspec);
967 return irq_domain_translate_twocell(d, &fwspec, out_hwirq, out_type);
968}
969EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell);
970
971/**
972 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings
973 *
974 * Device Tree IRQ specifier translation function which works with either one
975 * or two cell bindings where the cell values map directly to the hwirq number
976 * and linux irq flags.
977 *
978 * Note: don't use this function unless your interrupt controller explicitly
979 * supports both one and two cell bindings. For the majority of controllers
980 * the _onecell() or _twocell() variants above should be used.
981 */
982int irq_domain_xlate_onetwocell(struct irq_domain *d,
983 struct device_node *ctrlr,
984 const u32 *intspec, unsigned int intsize,
985 unsigned long *out_hwirq, unsigned int *out_type)
986{
987 if (WARN_ON(intsize < 1))
988 return -EINVAL;
989 *out_hwirq = intspec[0];
990 if (intsize > 1)
991 *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
992 else
993 *out_type = IRQ_TYPE_NONE;
994 return 0;
995}
996EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell);
997
998const struct irq_domain_ops irq_domain_simple_ops = {
999 .xlate = irq_domain_xlate_onetwocell,
1000};
1001EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
1002
1003/**
1004 * irq_domain_translate_onecell() - Generic translate for direct one cell
1005 * bindings
1006 */
1007int irq_domain_translate_onecell(struct irq_domain *d,
1008 struct irq_fwspec *fwspec,
1009 unsigned long *out_hwirq,
1010 unsigned int *out_type)
1011{
1012 if (WARN_ON(fwspec->param_count < 1))
1013 return -EINVAL;
1014 *out_hwirq = fwspec->param[0];
1015 *out_type = IRQ_TYPE_NONE;
1016 return 0;
1017}
1018EXPORT_SYMBOL_GPL(irq_domain_translate_onecell);
1019
1020/**
1021 * irq_domain_translate_twocell() - Generic translate for direct two cell
1022 * bindings
1023 *
1024 * Device Tree IRQ specifier translation function which works with two cell
1025 * bindings where the cell values map directly to the hwirq number
1026 * and linux irq flags.
1027 */
1028int irq_domain_translate_twocell(struct irq_domain *d,
1029 struct irq_fwspec *fwspec,
1030 unsigned long *out_hwirq,
1031 unsigned int *out_type)
1032{
1033 if (WARN_ON(fwspec->param_count < 2))
1034 return -EINVAL;
1035 *out_hwirq = fwspec->param[0];
1036 *out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;
1037 return 0;
1038}
1039EXPORT_SYMBOL_GPL(irq_domain_translate_twocell);
1040
1041int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq,
1042 int node, const struct irq_affinity_desc *affinity)
1043{
1044 unsigned int hint;
1045
1046 if (virq >= 0) {
1047 virq = __irq_alloc_descs(virq, virq, cnt, node, THIS_MODULE,
1048 affinity);
1049 } else {
1050 hint = hwirq % nr_irqs;
1051 if (hint == 0)
1052 hint++;
1053 virq = __irq_alloc_descs(-1, hint, cnt, node, THIS_MODULE,
1054 affinity);
1055 if (virq <= 0 && hint > 1) {
1056 virq = __irq_alloc_descs(-1, 1, cnt, node, THIS_MODULE,
1057 affinity);
1058 }
1059 }
1060
1061 return virq;
1062}
1063
1064/**
1065 * irq_domain_reset_irq_data - Clear hwirq, chip and chip_data in @irq_data
1066 * @irq_data: The pointer to irq_data
1067 */
1068void irq_domain_reset_irq_data(struct irq_data *irq_data)
1069{
1070 irq_data->hwirq = 0;
1071 irq_data->chip = &no_irq_chip;
1072 irq_data->chip_data = NULL;
1073}
1074EXPORT_SYMBOL_GPL(irq_domain_reset_irq_data);
1075
1076#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1077/**
1078 * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy
1079 * @parent: Parent irq domain to associate with the new domain
1080 * @flags: Irq domain flags associated to the domain
1081 * @size: Size of the domain. See below
1082 * @fwnode: Optional fwnode of the interrupt controller
1083 * @ops: Pointer to the interrupt domain callbacks
1084 * @host_data: Controller private data pointer
1085 *
1086 * If @size is 0 a tree domain is created, otherwise a linear domain.
1087 *
1088 * If successful the parent is associated to the new domain and the
1089 * domain flags are set.
1090 * Returns pointer to IRQ domain, or NULL on failure.
1091 */
1092struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
1093 unsigned int flags,
1094 unsigned int size,
1095 struct fwnode_handle *fwnode,
1096 const struct irq_domain_ops *ops,
1097 void *host_data)
1098{
1099 struct irq_domain *domain;
1100
1101 if (size)
1102 domain = irq_domain_create_linear(fwnode, size, ops, host_data);
1103 else
1104 domain = irq_domain_create_tree(fwnode, ops, host_data);
1105 if (domain) {
1106 domain->parent = parent;
1107 domain->flags |= flags;
1108 }
1109
1110 return domain;
1111}
1112EXPORT_SYMBOL_GPL(irq_domain_create_hierarchy);
1113
1114static void irq_domain_insert_irq(int virq)
1115{
1116 struct irq_data *data;
1117
1118 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1119 struct irq_domain *domain = data->domain;
1120
1121 domain->mapcount++;
1122 irq_domain_set_mapping(domain, data->hwirq, data);
1123
1124 /* If not already assigned, give the domain the chip's name */
1125 if (!domain->name && data->chip)
1126 domain->name = data->chip->name;
1127 }
1128
1129 irq_clear_status_flags(virq, IRQ_NOREQUEST);
1130}
1131
1132static void irq_domain_remove_irq(int virq)
1133{
1134 struct irq_data *data;
1135
1136 irq_set_status_flags(virq, IRQ_NOREQUEST);
1137 irq_set_chip_and_handler(virq, NULL, NULL);
1138 synchronize_irq(virq);
1139 smp_mb();
1140
1141 for (data = irq_get_irq_data(virq); data; data = data->parent_data) {
1142 struct irq_domain *domain = data->domain;
1143 irq_hw_number_t hwirq = data->hwirq;
1144
1145 domain->mapcount--;
1146 irq_domain_clear_mapping(domain, hwirq);
1147 }
1148}
1149
1150static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain,
1151 struct irq_data *child)
1152{
1153 struct irq_data *irq_data;
1154
1155 irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL,
1156 irq_data_get_node(child));
1157 if (irq_data) {
1158 child->parent_data = irq_data;
1159 irq_data->irq = child->irq;
1160 irq_data->common = child->common;
1161 irq_data->domain = domain;
1162 }
1163
1164 return irq_data;
1165}
1166
1167static void __irq_domain_free_hierarchy(struct irq_data *irq_data)
1168{
1169 struct irq_data *tmp;
1170
1171 while (irq_data) {
1172 tmp = irq_data;
1173 irq_data = irq_data->parent_data;
1174 kfree(tmp);
1175 }
1176}
1177
1178static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs)
1179{
1180 struct irq_data *irq_data, *tmp;
1181 int i;
1182
1183 for (i = 0; i < nr_irqs; i++) {
1184 irq_data = irq_get_irq_data(virq + i);
1185 tmp = irq_data->parent_data;
1186 irq_data->parent_data = NULL;
1187 irq_data->domain = NULL;
1188
1189 __irq_domain_free_hierarchy(tmp);
1190 }
1191}
1192
1193/**
1194 * irq_domain_disconnect_hierarchy - Mark the first unused level of a hierarchy
1195 * @domain: IRQ domain from which the hierarchy is to be disconnected
1196 * @virq: IRQ number where the hierarchy is to be trimmed
1197 *
1198 * Marks the @virq level belonging to @domain as disconnected.
1199 * Returns -EINVAL if @virq doesn't have a valid irq_data pointing
1200 * to @domain.
1201 *
1202 * Its only use is to be able to trim levels of hierarchy that do not
1203 * have any real meaning for this interrupt, and that the driver marks
1204 * as such from its .alloc() callback.
1205 */
1206int irq_domain_disconnect_hierarchy(struct irq_domain *domain,
1207 unsigned int virq)
1208{
1209 struct irq_data *irqd;
1210
1211 irqd = irq_domain_get_irq_data(domain, virq);
1212 if (!irqd)
1213 return -EINVAL;
1214
1215 irqd->chip = ERR_PTR(-ENOTCONN);
1216 return 0;
1217}
1218
1219static int irq_domain_trim_hierarchy(unsigned int virq)
1220{
1221 struct irq_data *tail, *irqd, *irq_data;
1222
1223 irq_data = irq_get_irq_data(virq);
1224 tail = NULL;
1225
1226 /* The first entry must have a valid irqchip */
1227 if (!irq_data->chip || IS_ERR(irq_data->chip))
1228 return -EINVAL;
1229
1230 /*
1231 * Validate that the irq_data chain is sane in the presence of
1232 * a hierarchy trimming marker.
1233 */
1234 for (irqd = irq_data->parent_data; irqd; irq_data = irqd, irqd = irqd->parent_data) {
1235 /* Can't have a valid irqchip after a trim marker */
1236 if (irqd->chip && tail)
1237 return -EINVAL;
1238
1239 /* Can't have an empty irqchip before a trim marker */
1240 if (!irqd->chip && !tail)
1241 return -EINVAL;
1242
1243 if (IS_ERR(irqd->chip)) {
1244 /* Only -ENOTCONN is a valid trim marker */
1245 if (PTR_ERR(irqd->chip) != -ENOTCONN)
1246 return -EINVAL;
1247
1248 tail = irq_data;
1249 }
1250 }
1251
1252 /* No trim marker, nothing to do */
1253 if (!tail)
1254 return 0;
1255
1256 pr_info("IRQ%d: trimming hierarchy from %s\n",
1257 virq, tail->parent_data->domain->name);
1258
1259 /* Sever the inner part of the hierarchy... */
1260 irqd = tail;
1261 tail = tail->parent_data;
1262 irqd->parent_data = NULL;
1263 __irq_domain_free_hierarchy(tail);
1264
1265 return 0;
1266}
1267
1268static int irq_domain_alloc_irq_data(struct irq_domain *domain,
1269 unsigned int virq, unsigned int nr_irqs)
1270{
1271 struct irq_data *irq_data;
1272 struct irq_domain *parent;
1273 int i;
1274
1275 /* The outermost irq_data is embedded in struct irq_desc */
1276 for (i = 0; i < nr_irqs; i++) {
1277 irq_data = irq_get_irq_data(virq + i);
1278 irq_data->domain = domain;
1279
1280 for (parent = domain->parent; parent; parent = parent->parent) {
1281 irq_data = irq_domain_insert_irq_data(parent, irq_data);
1282 if (!irq_data) {
1283 irq_domain_free_irq_data(virq, i + 1);
1284 return -ENOMEM;
1285 }
1286 }
1287 }
1288
1289 return 0;
1290}
1291
1292/**
1293 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1294 * @domain: domain to match
1295 * @virq: IRQ number to get irq_data
1296 */
1297struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1298 unsigned int virq)
1299{
1300 struct irq_data *irq_data;
1301
1302 for (irq_data = irq_get_irq_data(virq); irq_data;
1303 irq_data = irq_data->parent_data)
1304 if (irq_data->domain == domain)
1305 return irq_data;
1306
1307 return NULL;
1308}
1309EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1310
1311/**
1312 * irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain
1313 * @domain: Interrupt domain to match
1314 * @virq: IRQ number
1315 * @hwirq: The hwirq number
1316 * @chip: The associated interrupt chip
1317 * @chip_data: The associated chip data
1318 */
1319int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq,
1320 irq_hw_number_t hwirq, struct irq_chip *chip,
1321 void *chip_data)
1322{
1323 struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq);
1324
1325 if (!irq_data)
1326 return -ENOENT;
1327
1328 irq_data->hwirq = hwirq;
1329 irq_data->chip = chip ? chip : &no_irq_chip;
1330 irq_data->chip_data = chip_data;
1331
1332 return 0;
1333}
1334EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip);
1335
1336/**
1337 * irq_domain_set_info - Set the complete data for a @virq in @domain
1338 * @domain: Interrupt domain to match
1339 * @virq: IRQ number
1340 * @hwirq: The hardware interrupt number
1341 * @chip: The associated interrupt chip
1342 * @chip_data: The associated interrupt chip data
1343 * @handler: The interrupt flow handler
1344 * @handler_data: The interrupt flow handler data
1345 * @handler_name: The interrupt handler name
1346 */
1347void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1348 irq_hw_number_t hwirq, struct irq_chip *chip,
1349 void *chip_data, irq_flow_handler_t handler,
1350 void *handler_data, const char *handler_name)
1351{
1352 irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data);
1353 __irq_set_handler(virq, handler, 0, handler_name);
1354 irq_set_handler_data(virq, handler_data);
1355}
1356EXPORT_SYMBOL(irq_domain_set_info);
1357
1358/**
1359 * irq_domain_free_irqs_common - Clear irq_data and free the parent
1360 * @domain: Interrupt domain to match
1361 * @virq: IRQ number to start with
1362 * @nr_irqs: The number of irqs to free
1363 */
1364void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq,
1365 unsigned int nr_irqs)
1366{
1367 struct irq_data *irq_data;
1368 int i;
1369
1370 for (i = 0; i < nr_irqs; i++) {
1371 irq_data = irq_domain_get_irq_data(domain, virq + i);
1372 if (irq_data)
1373 irq_domain_reset_irq_data(irq_data);
1374 }
1375 irq_domain_free_irqs_parent(domain, virq, nr_irqs);
1376}
1377EXPORT_SYMBOL_GPL(irq_domain_free_irqs_common);
1378
1379/**
1380 * irq_domain_free_irqs_top - Clear handler and handler data, clear irqdata and free parent
1381 * @domain: Interrupt domain to match
1382 * @virq: IRQ number to start with
1383 * @nr_irqs: The number of irqs to free
1384 */
1385void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq,
1386 unsigned int nr_irqs)
1387{
1388 int i;
1389
1390 for (i = 0; i < nr_irqs; i++) {
1391 irq_set_handler_data(virq + i, NULL);
1392 irq_set_handler(virq + i, NULL);
1393 }
1394 irq_domain_free_irqs_common(domain, virq, nr_irqs);
1395}
1396
1397static void irq_domain_free_irqs_hierarchy(struct irq_domain *domain,
1398 unsigned int irq_base,
1399 unsigned int nr_irqs)
1400{
1401 unsigned int i;
1402
1403 if (!domain->ops->free)
1404 return;
1405
1406 for (i = 0; i < nr_irqs; i++) {
1407 if (irq_domain_get_irq_data(domain, irq_base + i))
1408 domain->ops->free(domain, irq_base + i, 1);
1409 }
1410}
1411
1412int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,
1413 unsigned int irq_base,
1414 unsigned int nr_irqs, void *arg)
1415{
1416 if (!domain->ops->alloc) {
1417 pr_debug("domain->ops->alloc() is NULL\n");
1418 return -ENOSYS;
1419 }
1420
1421 return domain->ops->alloc(domain, irq_base, nr_irqs, arg);
1422}
1423
1424/**
1425 * __irq_domain_alloc_irqs - Allocate IRQs from domain
1426 * @domain: domain to allocate from
1427 * @irq_base: allocate specified IRQ number if irq_base >= 0
1428 * @nr_irqs: number of IRQs to allocate
1429 * @node: NUMA node id for memory allocation
1430 * @arg: domain specific argument
1431 * @realloc: IRQ descriptors have already been allocated if true
1432 * @affinity: Optional irq affinity mask for multiqueue devices
1433 *
1434 * Allocate IRQ numbers and initialized all data structures to support
1435 * hierarchy IRQ domains.
1436 * Parameter @realloc is mainly to support legacy IRQs.
1437 * Returns error code or allocated IRQ number
1438 *
1439 * The whole process to setup an IRQ has been split into two steps.
1440 * The first step, __irq_domain_alloc_irqs(), is to allocate IRQ
1441 * descriptor and required hardware resources. The second step,
1442 * irq_domain_activate_irq(), is to program the hardware with preallocated
1443 * resources. In this way, it's easier to rollback when failing to
1444 * allocate resources.
1445 */
1446int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
1447 unsigned int nr_irqs, int node, void *arg,
1448 bool realloc, const struct irq_affinity_desc *affinity)
1449{
1450 int i, ret, virq;
1451
1452 if (domain == NULL) {
1453 domain = irq_default_domain;
1454 if (WARN(!domain, "domain is NULL; cannot allocate IRQ\n"))
1455 return -EINVAL;
1456 }
1457
1458 if (realloc && irq_base >= 0) {
1459 virq = irq_base;
1460 } else {
1461 virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node,
1462 affinity);
1463 if (virq < 0) {
1464 pr_debug("cannot allocate IRQ(base %d, count %d)\n",
1465 irq_base, nr_irqs);
1466 return virq;
1467 }
1468 }
1469
1470 if (irq_domain_alloc_irq_data(domain, virq, nr_irqs)) {
1471 pr_debug("cannot allocate memory for IRQ%d\n", virq);
1472 ret = -ENOMEM;
1473 goto out_free_desc;
1474 }
1475
1476 mutex_lock(&irq_domain_mutex);
1477 ret = irq_domain_alloc_irqs_hierarchy(domain, virq, nr_irqs, arg);
1478 if (ret < 0) {
1479 mutex_unlock(&irq_domain_mutex);
1480 goto out_free_irq_data;
1481 }
1482
1483 for (i = 0; i < nr_irqs; i++) {
1484 ret = irq_domain_trim_hierarchy(virq + i);
1485 if (ret) {
1486 mutex_unlock(&irq_domain_mutex);
1487 goto out_free_irq_data;
1488 }
1489 }
1490
1491 for (i = 0; i < nr_irqs; i++)
1492 irq_domain_insert_irq(virq + i);
1493 mutex_unlock(&irq_domain_mutex);
1494
1495 return virq;
1496
1497out_free_irq_data:
1498 irq_domain_free_irq_data(virq, nr_irqs);
1499out_free_desc:
1500 irq_free_descs(virq, nr_irqs);
1501 return ret;
1502}
1503
1504/* The irq_data was moved, fix the revmap to refer to the new location */
1505static void irq_domain_fix_revmap(struct irq_data *d)
1506{
1507 void __rcu **slot;
1508
1509 if (irq_domain_is_nomap(d->domain))
1510 return;
1511
1512 /* Fix up the revmap. */
1513 mutex_lock(&d->domain->revmap_mutex);
1514 if (d->hwirq < d->domain->revmap_size) {
1515 /* Not using radix tree */
1516 rcu_assign_pointer(d->domain->revmap[d->hwirq], d);
1517 } else {
1518 slot = radix_tree_lookup_slot(&d->domain->revmap_tree, d->hwirq);
1519 if (slot)
1520 radix_tree_replace_slot(&d->domain->revmap_tree, slot, d);
1521 }
1522 mutex_unlock(&d->domain->revmap_mutex);
1523}
1524
1525/**
1526 * irq_domain_push_irq() - Push a domain in to the top of a hierarchy.
1527 * @domain: Domain to push.
1528 * @virq: Irq to push the domain in to.
1529 * @arg: Passed to the irq_domain_ops alloc() function.
1530 *
1531 * For an already existing irqdomain hierarchy, as might be obtained
1532 * via a call to pci_enable_msix(), add an additional domain to the
1533 * head of the processing chain. Must be called before request_irq()
1534 * has been called.
1535 */
1536int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg)
1537{
1538 struct irq_data *child_irq_data;
1539 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1540 struct irq_desc *desc;
1541 int rv = 0;
1542
1543 /*
1544 * Check that no action has been set, which indicates the virq
1545 * is in a state where this function doesn't have to deal with
1546 * races between interrupt handling and maintaining the
1547 * hierarchy. This will catch gross misuse. Attempting to
1548 * make the check race free would require holding locks across
1549 * calls to struct irq_domain_ops->alloc(), which could lead
1550 * to deadlock, so we just do a simple check before starting.
1551 */
1552 desc = irq_to_desc(virq);
1553 if (!desc)
1554 return -EINVAL;
1555 if (WARN_ON(desc->action))
1556 return -EBUSY;
1557
1558 if (domain == NULL)
1559 return -EINVAL;
1560
1561 if (WARN_ON(!irq_domain_is_hierarchy(domain)))
1562 return -EINVAL;
1563
1564 if (!root_irq_data)
1565 return -EINVAL;
1566
1567 if (domain->parent != root_irq_data->domain)
1568 return -EINVAL;
1569
1570 child_irq_data = kzalloc_node(sizeof(*child_irq_data), GFP_KERNEL,
1571 irq_data_get_node(root_irq_data));
1572 if (!child_irq_data)
1573 return -ENOMEM;
1574
1575 mutex_lock(&irq_domain_mutex);
1576
1577 /* Copy the original irq_data. */
1578 *child_irq_data = *root_irq_data;
1579
1580 /*
1581 * Overwrite the root_irq_data, which is embedded in struct
1582 * irq_desc, with values for this domain.
1583 */
1584 root_irq_data->parent_data = child_irq_data;
1585 root_irq_data->domain = domain;
1586 root_irq_data->mask = 0;
1587 root_irq_data->hwirq = 0;
1588 root_irq_data->chip = NULL;
1589 root_irq_data->chip_data = NULL;
1590
1591 /* May (probably does) set hwirq, chip, etc. */
1592 rv = irq_domain_alloc_irqs_hierarchy(domain, virq, 1, arg);
1593 if (rv) {
1594 /* Restore the original irq_data. */
1595 *root_irq_data = *child_irq_data;
1596 kfree(child_irq_data);
1597 goto error;
1598 }
1599
1600 irq_domain_fix_revmap(child_irq_data);
1601 irq_domain_set_mapping(domain, root_irq_data->hwirq, root_irq_data);
1602
1603error:
1604 mutex_unlock(&irq_domain_mutex);
1605
1606 return rv;
1607}
1608EXPORT_SYMBOL_GPL(irq_domain_push_irq);
1609
1610/**
1611 * irq_domain_pop_irq() - Remove a domain from the top of a hierarchy.
1612 * @domain: Domain to remove.
1613 * @virq: Irq to remove the domain from.
1614 *
1615 * Undo the effects of a call to irq_domain_push_irq(). Must be
1616 * called either before request_irq() or after free_irq().
1617 */
1618int irq_domain_pop_irq(struct irq_domain *domain, int virq)
1619{
1620 struct irq_data *root_irq_data = irq_get_irq_data(virq);
1621 struct irq_data *child_irq_data;
1622 struct irq_data *tmp_irq_data;
1623 struct irq_desc *desc;
1624
1625 /*
1626 * Check that no action is set, which indicates the virq is in
1627 * a state where this function doesn't have to deal with races
1628 * between interrupt handling and maintaining the hierarchy.
1629 * This will catch gross misuse. Attempting to make the check
1630 * race free would require holding locks across calls to
1631 * struct irq_domain_ops->free(), which could lead to
1632 * deadlock, so we just do a simple check before starting.
1633 */
1634 desc = irq_to_desc(virq);
1635 if (!desc)
1636 return -EINVAL;
1637 if (WARN_ON(desc->action))
1638 return -EBUSY;
1639
1640 if (domain == NULL)
1641 return -EINVAL;
1642
1643 if (!root_irq_data)
1644 return -EINVAL;
1645
1646 tmp_irq_data = irq_domain_get_irq_data(domain, virq);
1647
1648 /* We can only "pop" if this domain is at the top of the list */
1649 if (WARN_ON(root_irq_data != tmp_irq_data))
1650 return -EINVAL;
1651
1652 if (WARN_ON(root_irq_data->domain != domain))
1653 return -EINVAL;
1654
1655 child_irq_data = root_irq_data->parent_data;
1656 if (WARN_ON(!child_irq_data))
1657 return -EINVAL;
1658
1659 mutex_lock(&irq_domain_mutex);
1660
1661 root_irq_data->parent_data = NULL;
1662
1663 irq_domain_clear_mapping(domain, root_irq_data->hwirq);
1664 irq_domain_free_irqs_hierarchy(domain, virq, 1);
1665
1666 /* Restore the original irq_data. */
1667 *root_irq_data = *child_irq_data;
1668
1669 irq_domain_fix_revmap(root_irq_data);
1670
1671 mutex_unlock(&irq_domain_mutex);
1672
1673 kfree(child_irq_data);
1674
1675 return 0;
1676}
1677EXPORT_SYMBOL_GPL(irq_domain_pop_irq);
1678
1679/**
1680 * irq_domain_free_irqs - Free IRQ number and associated data structures
1681 * @virq: base IRQ number
1682 * @nr_irqs: number of IRQs to free
1683 */
1684void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs)
1685{
1686 struct irq_data *data = irq_get_irq_data(virq);
1687 int i;
1688
1689 if (WARN(!data || !data->domain || !data->domain->ops->free,
1690 "NULL pointer, cannot free irq\n"))
1691 return;
1692
1693 mutex_lock(&irq_domain_mutex);
1694 for (i = 0; i < nr_irqs; i++)
1695 irq_domain_remove_irq(virq + i);
1696 irq_domain_free_irqs_hierarchy(data->domain, virq, nr_irqs);
1697 mutex_unlock(&irq_domain_mutex);
1698
1699 irq_domain_free_irq_data(virq, nr_irqs);
1700 irq_free_descs(virq, nr_irqs);
1701}
1702
1703/**
1704 * irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain
1705 * @domain: Domain below which interrupts must be allocated
1706 * @irq_base: Base IRQ number
1707 * @nr_irqs: Number of IRQs to allocate
1708 * @arg: Allocation data (arch/domain specific)
1709 */
1710int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
1711 unsigned int irq_base, unsigned int nr_irqs,
1712 void *arg)
1713{
1714 if (!domain->parent)
1715 return -ENOSYS;
1716
1717 return irq_domain_alloc_irqs_hierarchy(domain->parent, irq_base,
1718 nr_irqs, arg);
1719}
1720EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent);
1721
1722/**
1723 * irq_domain_free_irqs_parent - Free interrupts from parent domain
1724 * @domain: Domain below which interrupts must be freed
1725 * @irq_base: Base IRQ number
1726 * @nr_irqs: Number of IRQs to free
1727 */
1728void irq_domain_free_irqs_parent(struct irq_domain *domain,
1729 unsigned int irq_base, unsigned int nr_irqs)
1730{
1731 if (!domain->parent)
1732 return;
1733
1734 irq_domain_free_irqs_hierarchy(domain->parent, irq_base, nr_irqs);
1735}
1736EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent);
1737
1738static void __irq_domain_deactivate_irq(struct irq_data *irq_data)
1739{
1740 if (irq_data && irq_data->domain) {
1741 struct irq_domain *domain = irq_data->domain;
1742
1743 if (domain->ops->deactivate)
1744 domain->ops->deactivate(domain, irq_data);
1745 if (irq_data->parent_data)
1746 __irq_domain_deactivate_irq(irq_data->parent_data);
1747 }
1748}
1749
1750static int __irq_domain_activate_irq(struct irq_data *irqd, bool reserve)
1751{
1752 int ret = 0;
1753
1754 if (irqd && irqd->domain) {
1755 struct irq_domain *domain = irqd->domain;
1756
1757 if (irqd->parent_data)
1758 ret = __irq_domain_activate_irq(irqd->parent_data,
1759 reserve);
1760 if (!ret && domain->ops->activate) {
1761 ret = domain->ops->activate(domain, irqd, reserve);
1762 /* Rollback in case of error */
1763 if (ret && irqd->parent_data)
1764 __irq_domain_deactivate_irq(irqd->parent_data);
1765 }
1766 }
1767 return ret;
1768}
1769
1770/**
1771 * irq_domain_activate_irq - Call domain_ops->activate recursively to activate
1772 * interrupt
1773 * @irq_data: Outermost irq_data associated with interrupt
1774 * @reserve: If set only reserve an interrupt vector instead of assigning one
1775 *
1776 * This is the second step to call domain_ops->activate to program interrupt
1777 * controllers, so the interrupt could actually get delivered.
1778 */
1779int irq_domain_activate_irq(struct irq_data *irq_data, bool reserve)
1780{
1781 int ret = 0;
1782
1783 if (!irqd_is_activated(irq_data))
1784 ret = __irq_domain_activate_irq(irq_data, reserve);
1785 if (!ret)
1786 irqd_set_activated(irq_data);
1787 return ret;
1788}
1789
1790/**
1791 * irq_domain_deactivate_irq - Call domain_ops->deactivate recursively to
1792 * deactivate interrupt
1793 * @irq_data: outermost irq_data associated with interrupt
1794 *
1795 * It calls domain_ops->deactivate to program interrupt controllers to disable
1796 * interrupt delivery.
1797 */
1798void irq_domain_deactivate_irq(struct irq_data *irq_data)
1799{
1800 if (irqd_is_activated(irq_data)) {
1801 __irq_domain_deactivate_irq(irq_data);
1802 irqd_clr_activated(irq_data);
1803 }
1804}
1805
1806static void irq_domain_check_hierarchy(struct irq_domain *domain)
1807{
1808 /* Hierarchy irq_domains must implement callback alloc() */
1809 if (domain->ops->alloc)
1810 domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY;
1811}
1812
1813/**
1814 * irq_domain_hierarchical_is_msi_remap - Check if the domain or any
1815 * parent has MSI remapping support
1816 * @domain: domain pointer
1817 */
1818bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain)
1819{
1820 for (; domain; domain = domain->parent) {
1821 if (irq_domain_is_msi_remap(domain))
1822 return true;
1823 }
1824 return false;
1825}
1826#else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1827/**
1828 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1829 * @domain: domain to match
1830 * @virq: IRQ number to get irq_data
1831 */
1832struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
1833 unsigned int virq)
1834{
1835 struct irq_data *irq_data = irq_get_irq_data(virq);
1836
1837 return (irq_data && irq_data->domain == domain) ? irq_data : NULL;
1838}
1839EXPORT_SYMBOL_GPL(irq_domain_get_irq_data);
1840
1841/**
1842 * irq_domain_set_info - Set the complete data for a @virq in @domain
1843 * @domain: Interrupt domain to match
1844 * @virq: IRQ number
1845 * @hwirq: The hardware interrupt number
1846 * @chip: The associated interrupt chip
1847 * @chip_data: The associated interrupt chip data
1848 * @handler: The interrupt flow handler
1849 * @handler_data: The interrupt flow handler data
1850 * @handler_name: The interrupt handler name
1851 */
1852void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
1853 irq_hw_number_t hwirq, struct irq_chip *chip,
1854 void *chip_data, irq_flow_handler_t handler,
1855 void *handler_data, const char *handler_name)
1856{
1857 irq_set_chip_and_handler_name(virq, chip, handler, handler_name);
1858 irq_set_chip_data(virq, chip_data);
1859 irq_set_handler_data(virq, handler_data);
1860}
1861
1862static void irq_domain_check_hierarchy(struct irq_domain *domain)
1863{
1864}
1865#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1866
1867#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
1868static struct dentry *domain_dir;
1869
1870static void
1871irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind)
1872{
1873 seq_printf(m, "%*sname: %s\n", ind, "", d->name);
1874 seq_printf(m, "%*ssize: %u\n", ind + 1, "", d->revmap_size);
1875 seq_printf(m, "%*smapped: %u\n", ind + 1, "", d->mapcount);
1876 seq_printf(m, "%*sflags: 0x%08x\n", ind +1 , "", d->flags);
1877 if (d->ops && d->ops->debug_show)
1878 d->ops->debug_show(m, d, NULL, ind + 1);
1879#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
1880 if (!d->parent)
1881 return;
1882 seq_printf(m, "%*sparent: %s\n", ind + 1, "", d->parent->name);
1883 irq_domain_debug_show_one(m, d->parent, ind + 4);
1884#endif
1885}
1886
1887static int irq_domain_debug_show(struct seq_file *m, void *p)
1888{
1889 struct irq_domain *d = m->private;
1890
1891 /* Default domain? Might be NULL */
1892 if (!d) {
1893 if (!irq_default_domain)
1894 return 0;
1895 d = irq_default_domain;
1896 }
1897 irq_domain_debug_show_one(m, d, 0);
1898 return 0;
1899}
1900DEFINE_SHOW_ATTRIBUTE(irq_domain_debug);
1901
1902static void debugfs_add_domain_dir(struct irq_domain *d)
1903{
1904 if (!d->name || !domain_dir)
1905 return;
1906 debugfs_create_file(d->name, 0444, domain_dir, d,
1907 &irq_domain_debug_fops);
1908}
1909
1910static void debugfs_remove_domain_dir(struct irq_domain *d)
1911{
1912 debugfs_remove(debugfs_lookup(d->name, domain_dir));
1913}
1914
1915void __init irq_domain_debugfs_init(struct dentry *root)
1916{
1917 struct irq_domain *d;
1918
1919 domain_dir = debugfs_create_dir("domains", root);
1920
1921 debugfs_create_file("default", 0444, domain_dir, NULL,
1922 &irq_domain_debug_fops);
1923 mutex_lock(&irq_domain_mutex);
1924 list_for_each_entry(d, &irq_domain_list, link)
1925 debugfs_add_domain_dir(d);
1926 mutex_unlock(&irq_domain_mutex);
1927}
1928#endif