1 #define pr_fmt(fmt) "irq: " fmt
3 #include <linux/debugfs.h>
4 #include <linux/hardirq.h>
5 #include <linux/interrupt.h>
7 #include <linux/irqdesc.h>
8 #include <linux/irqdomain.h>
9 #include <linux/module.h>
10 #include <linux/mutex.h>
12 #include <linux/of_address.h>
13 #include <linux/of_irq.h>
14 #include <linux/topology.h>
15 #include <linux/seq_file.h>
16 #include <linux/slab.h>
17 #include <linux/smp.h>
20 static LIST_HEAD(irq_domain_list
);
21 static DEFINE_MUTEX(irq_domain_mutex
);
23 static DEFINE_MUTEX(revmap_trees_mutex
);
24 static struct irq_domain
*irq_default_domain
;
26 static void irq_domain_check_hierarchy(struct irq_domain
*domain
);
29 struct fwnode_handle fwnode
;
35 * irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for
36 * identifying an irq domain
37 * @data: optional user-provided data
39 * Allocate a struct device_node, and return a poiner to the embedded
40 * fwnode_handle (or NULL on failure).
42 struct fwnode_handle
*irq_domain_alloc_fwnode(void *data
)
44 struct irqchip_fwid
*fwid
;
47 fwid
= kzalloc(sizeof(*fwid
), GFP_KERNEL
);
48 name
= kasprintf(GFP_KERNEL
, "irqchip@%p", data
);
58 fwid
->fwnode
.type
= FWNODE_IRQCHIP
;
61 EXPORT_SYMBOL_GPL(irq_domain_alloc_fwnode
);
64 * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle
66 * Free a fwnode_handle allocated with irq_domain_alloc_fwnode.
68 void irq_domain_free_fwnode(struct fwnode_handle
*fwnode
)
70 struct irqchip_fwid
*fwid
;
72 if (WARN_ON(!is_fwnode_irqchip(fwnode
)))
75 fwid
= container_of(fwnode
, struct irqchip_fwid
, fwnode
);
79 EXPORT_SYMBOL_GPL(irq_domain_free_fwnode
);
82 * __irq_domain_add() - Allocate a new irq_domain data structure
83 * @of_node: optional device-tree node of 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
88 * @ops: domain callbacks
89 * @host_data: Controller private data pointer
91 * Allocates and initialize and irq_domain structure.
92 * Returns pointer to IRQ domain, or NULL on failure.
94 struct 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
,
99 struct irq_domain
*domain
;
100 struct device_node
*of_node
;
102 of_node
= to_of_node(fwnode
);
104 domain
= kzalloc_node(sizeof(*domain
) + (sizeof(unsigned int) * size
),
105 GFP_KERNEL
, of_node_to_nid(of_node
));
106 if (WARN_ON(!domain
))
109 of_node_get(of_node
);
112 INIT_RADIX_TREE(&domain
->revmap_tree
, GFP_KERNEL
);
114 domain
->host_data
= host_data
;
115 domain
->fwnode
= fwnode
;
116 domain
->hwirq_max
= hwirq_max
;
117 domain
->revmap_size
= size
;
118 domain
->revmap_direct_max_irq
= direct_max
;
119 irq_domain_check_hierarchy(domain
);
121 mutex_lock(&irq_domain_mutex
);
122 list_add(&domain
->link
, &irq_domain_list
);
123 mutex_unlock(&irq_domain_mutex
);
125 pr_debug("Added domain %s\n", domain
->name
);
128 EXPORT_SYMBOL_GPL(__irq_domain_add
);
131 * irq_domain_remove() - Remove an irq domain.
132 * @domain: domain to remove
134 * This routine is used to remove an irq domain. The caller must ensure
135 * that all mappings within the domain have been disposed of prior to
136 * use, depending on the revmap type.
138 void irq_domain_remove(struct irq_domain
*domain
)
140 mutex_lock(&irq_domain_mutex
);
143 * radix_tree_delete() takes care of destroying the root
144 * node when all entries are removed. Shout if there are
147 WARN_ON(domain
->revmap_tree
.height
);
149 list_del(&domain
->link
);
152 * If the going away domain is the default one, reset it.
154 if (unlikely(irq_default_domain
== domain
))
155 irq_set_default_host(NULL
);
157 mutex_unlock(&irq_domain_mutex
);
159 pr_debug("Removed domain %s\n", domain
->name
);
161 of_node_put(irq_domain_get_of_node(domain
));
164 EXPORT_SYMBOL_GPL(irq_domain_remove
);
167 * irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs
168 * @of_node: pointer to interrupt controller's device tree node.
169 * @size: total number of irqs in mapping
170 * @first_irq: first number of irq block assigned to the domain,
171 * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then
172 * pre-map all of the irqs in the domain to virqs starting at first_irq.
173 * @ops: domain callbacks
174 * @host_data: Controller private data pointer
176 * Allocates an irq_domain, and optionally if first_irq is positive then also
177 * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq.
179 * This is intended to implement the expected behaviour for most
180 * interrupt controllers. If device tree is used, then first_irq will be 0 and
181 * irqs get mapped dynamically on the fly. However, if the controller requires
182 * static virq assignments (non-DT boot) then it will set that up correctly.
184 struct irq_domain
*irq_domain_add_simple(struct device_node
*of_node
,
186 unsigned int first_irq
,
187 const struct irq_domain_ops
*ops
,
190 struct irq_domain
*domain
;
192 domain
= __irq_domain_add(of_node_to_fwnode(of_node
), size
, size
, 0, ops
, host_data
);
197 if (IS_ENABLED(CONFIG_SPARSE_IRQ
)) {
198 /* attempt to allocated irq_descs */
199 int rc
= irq_alloc_descs(first_irq
, first_irq
, size
,
200 of_node_to_nid(of_node
));
202 pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
205 irq_domain_associate_many(domain
, first_irq
, 0, size
);
210 EXPORT_SYMBOL_GPL(irq_domain_add_simple
);
213 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain.
214 * @of_node: pointer to interrupt controller's device tree node.
215 * @size: total number of irqs in legacy mapping
216 * @first_irq: first number of irq block assigned to the domain
217 * @first_hwirq: first hwirq number to use for the translation. Should normally
218 * be '0', but a positive integer can be used if the effective
219 * hwirqs numbering does not begin at zero.
220 * @ops: map/unmap domain callbacks
221 * @host_data: Controller private data pointer
223 * Note: the map() callback will be called before this function returns
224 * for all legacy interrupts except 0 (which is always the invalid irq for
225 * a legacy controller).
227 struct irq_domain
*irq_domain_add_legacy(struct device_node
*of_node
,
229 unsigned int first_irq
,
230 irq_hw_number_t first_hwirq
,
231 const struct irq_domain_ops
*ops
,
234 struct irq_domain
*domain
;
236 domain
= __irq_domain_add(of_node_to_fwnode(of_node
), first_hwirq
+ size
,
237 first_hwirq
+ size
, 0, ops
, host_data
);
239 irq_domain_associate_many(domain
, first_irq
, first_hwirq
, size
);
243 EXPORT_SYMBOL_GPL(irq_domain_add_legacy
);
246 * irq_find_matching_fwspec() - Locates a domain for a given fwspec
247 * @fwspec: FW specifier for an interrupt
248 * @bus_token: domain-specific data
250 struct irq_domain
*irq_find_matching_fwspec(struct irq_fwspec
*fwspec
,
251 enum irq_domain_bus_token bus_token
)
253 struct irq_domain
*h
, *found
= NULL
;
254 struct fwnode_handle
*fwnode
= fwspec
->fwnode
;
257 /* We might want to match the legacy controller last since
258 * it might potentially be set to match all interrupts in
259 * the absence of a device node. This isn't a problem so far
262 * bus_token == DOMAIN_BUS_ANY matches any domain, any other
263 * values must generate an exact match for the domain to be
266 mutex_lock(&irq_domain_mutex
);
267 list_for_each_entry(h
, &irq_domain_list
, link
) {
268 if (h
->ops
->select
&& fwspec
->param_count
)
269 rc
= h
->ops
->select(h
, fwspec
, bus_token
);
270 else if (h
->ops
->match
)
271 rc
= h
->ops
->match(h
, to_of_node(fwnode
), bus_token
);
273 rc
= ((fwnode
!= NULL
) && (h
->fwnode
== fwnode
) &&
274 ((bus_token
== DOMAIN_BUS_ANY
) ||
275 (h
->bus_token
== bus_token
)));
282 mutex_unlock(&irq_domain_mutex
);
285 EXPORT_SYMBOL_GPL(irq_find_matching_fwspec
);
288 * irq_set_default_host() - Set a "default" irq domain
289 * @domain: default domain pointer
291 * For convenience, it's possible to set a "default" domain that will be used
292 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
293 * platforms that want to manipulate a few hard coded interrupt numbers that
294 * aren't properly represented in the device-tree.
296 void irq_set_default_host(struct irq_domain
*domain
)
298 pr_debug("Default domain set to @0x%p\n", domain
);
300 irq_default_domain
= domain
;
302 EXPORT_SYMBOL_GPL(irq_set_default_host
);
304 void irq_domain_disassociate(struct irq_domain
*domain
, unsigned int irq
)
306 struct irq_data
*irq_data
= irq_get_irq_data(irq
);
307 irq_hw_number_t hwirq
;
309 if (WARN(!irq_data
|| irq_data
->domain
!= domain
,
310 "virq%i doesn't exist; cannot disassociate\n", irq
))
313 hwirq
= irq_data
->hwirq
;
314 irq_set_status_flags(irq
, IRQ_NOREQUEST
);
316 /* remove chip and handler */
317 irq_set_chip_and_handler(irq
, NULL
, NULL
);
319 /* Make sure it's completed */
320 synchronize_irq(irq
);
322 /* Tell the PIC about it */
323 if (domain
->ops
->unmap
)
324 domain
->ops
->unmap(domain
, irq
);
327 irq_data
->domain
= NULL
;
330 /* Clear reverse map for this hwirq */
331 if (hwirq
< domain
->revmap_size
) {
332 domain
->linear_revmap
[hwirq
] = 0;
334 mutex_lock(&revmap_trees_mutex
);
335 radix_tree_delete(&domain
->revmap_tree
, hwirq
);
336 mutex_unlock(&revmap_trees_mutex
);
340 int irq_domain_associate(struct irq_domain
*domain
, unsigned int virq
,
341 irq_hw_number_t hwirq
)
343 struct irq_data
*irq_data
= irq_get_irq_data(virq
);
346 if (WARN(hwirq
>= domain
->hwirq_max
,
347 "error: hwirq 0x%x is too large for %s\n", (int)hwirq
, domain
->name
))
349 if (WARN(!irq_data
, "error: virq%i is not allocated", virq
))
351 if (WARN(irq_data
->domain
, "error: virq%i is already associated", virq
))
354 mutex_lock(&irq_domain_mutex
);
355 irq_data
->hwirq
= hwirq
;
356 irq_data
->domain
= domain
;
357 if (domain
->ops
->map
) {
358 ret
= domain
->ops
->map(domain
, virq
, hwirq
);
361 * If map() returns -EPERM, this interrupt is protected
362 * by the firmware or some other service and shall not
363 * be mapped. Don't bother telling the user about it.
366 pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n",
367 domain
->name
, hwirq
, virq
, ret
);
369 irq_data
->domain
= NULL
;
371 mutex_unlock(&irq_domain_mutex
);
375 /* If not already assigned, give the domain the chip's name */
376 if (!domain
->name
&& irq_data
->chip
)
377 domain
->name
= irq_data
->chip
->name
;
380 if (hwirq
< domain
->revmap_size
) {
381 domain
->linear_revmap
[hwirq
] = virq
;
383 mutex_lock(&revmap_trees_mutex
);
384 radix_tree_insert(&domain
->revmap_tree
, hwirq
, irq_data
);
385 mutex_unlock(&revmap_trees_mutex
);
387 mutex_unlock(&irq_domain_mutex
);
389 irq_clear_status_flags(virq
, IRQ_NOREQUEST
);
393 EXPORT_SYMBOL_GPL(irq_domain_associate
);
395 void irq_domain_associate_many(struct irq_domain
*domain
, unsigned int irq_base
,
396 irq_hw_number_t hwirq_base
, int count
)
398 struct device_node
*of_node
;
401 of_node
= irq_domain_get_of_node(domain
);
402 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__
,
403 of_node_full_name(of_node
), irq_base
, (int)hwirq_base
, count
);
405 for (i
= 0; i
< count
; i
++) {
406 irq_domain_associate(domain
, irq_base
+ i
, hwirq_base
+ i
);
409 EXPORT_SYMBOL_GPL(irq_domain_associate_many
);
412 * irq_create_direct_mapping() - Allocate an irq for direct mapping
413 * @domain: domain to allocate the irq for or NULL for default domain
415 * This routine is used for irq controllers which can choose the hardware
416 * interrupt numbers they generate. In such a case it's simplest to use
417 * the linux irq as the hardware interrupt number. It still uses the linear
418 * or radix tree to store the mapping, but the irq controller can optimize
419 * the revmap path by using the hwirq directly.
421 unsigned int irq_create_direct_mapping(struct irq_domain
*domain
)
423 struct device_node
*of_node
;
427 domain
= irq_default_domain
;
429 of_node
= irq_domain_get_of_node(domain
);
430 virq
= irq_alloc_desc_from(1, of_node_to_nid(of_node
));
432 pr_debug("create_direct virq allocation failed\n");
435 if (virq
>= domain
->revmap_direct_max_irq
) {
436 pr_err("ERROR: no free irqs available below %i maximum\n",
437 domain
->revmap_direct_max_irq
);
441 pr_debug("create_direct obtained virq %d\n", virq
);
443 if (irq_domain_associate(domain
, virq
, virq
)) {
450 EXPORT_SYMBOL_GPL(irq_create_direct_mapping
);
453 * irq_create_mapping() - Map a hardware interrupt into linux irq space
454 * @domain: domain owning this hardware interrupt or NULL for default domain
455 * @hwirq: hardware irq number in that domain space
457 * Only one mapping per hardware interrupt is permitted. Returns a linux
459 * If the sense/trigger is to be specified, set_irq_type() should be called
460 * on the number returned from that call.
462 unsigned int irq_create_mapping(struct irq_domain
*domain
,
463 irq_hw_number_t hwirq
)
465 struct device_node
*of_node
;
468 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain
, hwirq
);
470 /* Look for default domain if nececssary */
472 domain
= irq_default_domain
;
473 if (domain
== NULL
) {
474 WARN(1, "%s(, %lx) called with NULL domain\n", __func__
, hwirq
);
477 pr_debug("-> using domain @%p\n", domain
);
479 of_node
= irq_domain_get_of_node(domain
);
481 /* Check if mapping already exists */
482 virq
= irq_find_mapping(domain
, hwirq
);
484 pr_debug("-> existing mapping on virq %d\n", virq
);
488 /* Allocate a virtual interrupt number */
489 virq
= irq_domain_alloc_descs(-1, 1, hwirq
, of_node_to_nid(of_node
));
491 pr_debug("-> virq allocation failed\n");
495 if (irq_domain_associate(domain
, virq
, hwirq
)) {
500 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
501 hwirq
, of_node_full_name(of_node
), virq
);
505 EXPORT_SYMBOL_GPL(irq_create_mapping
);
508 * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs
509 * @domain: domain owning the interrupt range
510 * @irq_base: beginning of linux IRQ range
511 * @hwirq_base: beginning of hardware IRQ range
512 * @count: Number of interrupts to map
514 * This routine is used for allocating and mapping a range of hardware
515 * irqs to linux irqs where the linux irq numbers are at pre-defined
516 * locations. For use by controllers that already have static mappings
517 * to insert in to the domain.
519 * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time
522 * 0 is returned upon success, while any failure to establish a static
523 * mapping is treated as an error.
525 int irq_create_strict_mappings(struct irq_domain
*domain
, unsigned int irq_base
,
526 irq_hw_number_t hwirq_base
, int count
)
528 struct device_node
*of_node
;
531 of_node
= irq_domain_get_of_node(domain
);
532 ret
= irq_alloc_descs(irq_base
, irq_base
, count
,
533 of_node_to_nid(of_node
));
534 if (unlikely(ret
< 0))
537 irq_domain_associate_many(domain
, irq_base
, hwirq_base
, count
);
540 EXPORT_SYMBOL_GPL(irq_create_strict_mappings
);
542 static int irq_domain_translate(struct irq_domain
*d
,
543 struct irq_fwspec
*fwspec
,
544 irq_hw_number_t
*hwirq
, unsigned int *type
)
546 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
547 if (d
->ops
->translate
)
548 return d
->ops
->translate(d
, fwspec
, hwirq
, type
);
551 return d
->ops
->xlate(d
, to_of_node(fwspec
->fwnode
),
552 fwspec
->param
, fwspec
->param_count
,
555 /* If domain has no translation, then we assume interrupt line */
556 *hwirq
= fwspec
->param
[0];
560 static void of_phandle_args_to_fwspec(struct of_phandle_args
*irq_data
,
561 struct irq_fwspec
*fwspec
)
565 fwspec
->fwnode
= irq_data
->np
? &irq_data
->np
->fwnode
: NULL
;
566 fwspec
->param_count
= irq_data
->args_count
;
568 for (i
= 0; i
< irq_data
->args_count
; i
++)
569 fwspec
->param
[i
] = irq_data
->args
[i
];
572 unsigned int irq_create_fwspec_mapping(struct irq_fwspec
*fwspec
)
574 struct irq_domain
*domain
;
575 irq_hw_number_t hwirq
;
576 unsigned int type
= IRQ_TYPE_NONE
;
579 if (fwspec
->fwnode
) {
580 domain
= irq_find_matching_fwspec(fwspec
, DOMAIN_BUS_WIRED
);
582 domain
= irq_find_matching_fwspec(fwspec
, DOMAIN_BUS_ANY
);
584 domain
= irq_default_domain
;
588 pr_warn("no irq domain found for %s !\n",
589 of_node_full_name(to_of_node(fwspec
->fwnode
)));
593 if (irq_domain_translate(domain
, fwspec
, &hwirq
, &type
))
596 if (irq_domain_is_hierarchy(domain
)) {
598 * If we've already configured this interrupt,
599 * don't do it again, or hell will break loose.
601 virq
= irq_find_mapping(domain
, hwirq
);
605 virq
= irq_domain_alloc_irqs(domain
, 1, NUMA_NO_NODE
, fwspec
);
610 virq
= irq_create_mapping(domain
, hwirq
);
615 /* Set type if specified and different than the current one */
616 if (type
!= IRQ_TYPE_NONE
&&
617 type
!= irq_get_trigger_type(virq
))
618 irq_set_irq_type(virq
, type
);
621 EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping
);
623 unsigned int irq_create_of_mapping(struct of_phandle_args
*irq_data
)
625 struct irq_fwspec fwspec
;
627 of_phandle_args_to_fwspec(irq_data
, &fwspec
);
628 return irq_create_fwspec_mapping(&fwspec
);
630 EXPORT_SYMBOL_GPL(irq_create_of_mapping
);
633 * irq_dispose_mapping() - Unmap an interrupt
634 * @virq: linux irq number of the interrupt to unmap
636 void irq_dispose_mapping(unsigned int virq
)
638 struct irq_data
*irq_data
= irq_get_irq_data(virq
);
639 struct irq_domain
*domain
;
641 if (!virq
|| !irq_data
)
644 domain
= irq_data
->domain
;
645 if (WARN_ON(domain
== NULL
))
648 irq_domain_disassociate(domain
, virq
);
651 EXPORT_SYMBOL_GPL(irq_dispose_mapping
);
654 * irq_find_mapping() - Find a linux irq from an hw irq number.
655 * @domain: domain owning this hardware interrupt
656 * @hwirq: hardware irq number in that domain space
658 unsigned int irq_find_mapping(struct irq_domain
*domain
,
659 irq_hw_number_t hwirq
)
661 struct irq_data
*data
;
663 /* Look for default domain if nececssary */
665 domain
= irq_default_domain
;
669 if (hwirq
< domain
->revmap_direct_max_irq
) {
670 data
= irq_domain_get_irq_data(domain
, hwirq
);
671 if (data
&& data
->hwirq
== hwirq
)
675 /* Check if the hwirq is in the linear revmap. */
676 if (hwirq
< domain
->revmap_size
)
677 return domain
->linear_revmap
[hwirq
];
680 data
= radix_tree_lookup(&domain
->revmap_tree
, hwirq
);
682 return data
? data
->irq
: 0;
684 EXPORT_SYMBOL_GPL(irq_find_mapping
);
686 #ifdef CONFIG_IRQ_DOMAIN_DEBUG
687 static int virq_debug_show(struct seq_file
*m
, void *private)
690 struct irq_desc
*desc
;
691 struct irq_domain
*domain
;
692 struct radix_tree_iter iter
;
696 seq_printf(m
, " %-16s %-6s %-10s %-10s %s\n",
697 "name", "mapped", "linear-max", "direct-max", "devtree-node");
698 mutex_lock(&irq_domain_mutex
);
699 list_for_each_entry(domain
, &irq_domain_list
, link
) {
700 struct device_node
*of_node
;
702 of_node
= irq_domain_get_of_node(domain
);
703 radix_tree_for_each_slot(slot
, &domain
->revmap_tree
, &iter
, 0)
705 seq_printf(m
, "%c%-16s %6u %10u %10u %s\n",
706 domain
== irq_default_domain
? '*' : ' ', domain
->name
,
707 domain
->revmap_size
+ count
, domain
->revmap_size
,
708 domain
->revmap_direct_max_irq
,
709 of_node
? of_node_full_name(of_node
) : "");
711 mutex_unlock(&irq_domain_mutex
);
713 seq_printf(m
, "%-5s %-7s %-15s %-*s %6s %-14s %s\n", "irq", "hwirq",
714 "chip name", (int)(2 * sizeof(void *) + 2), "chip data",
715 "active", "type", "domain");
717 for (i
= 1; i
< nr_irqs
; i
++) {
718 desc
= irq_to_desc(i
);
722 raw_spin_lock_irqsave(&desc
->lock
, flags
);
723 domain
= desc
->irq_data
.domain
;
726 struct irq_chip
*chip
;
727 int hwirq
= desc
->irq_data
.hwirq
;
730 seq_printf(m
, "%5d ", i
);
731 seq_printf(m
, "0x%05x ", hwirq
);
733 chip
= irq_desc_get_chip(desc
);
734 seq_printf(m
, "%-15s ", (chip
&& chip
->name
) ? chip
->name
: "none");
736 data
= irq_desc_get_chip_data(desc
);
737 seq_printf(m
, data
? "0x%p " : " %p ", data
);
739 seq_printf(m
, " %c ", (desc
->action
&& desc
->action
->handler
) ? '*' : ' ');
740 direct
= (i
== hwirq
) && (i
< domain
->revmap_direct_max_irq
);
741 seq_printf(m
, "%6s%-8s ",
742 (hwirq
< domain
->revmap_size
) ? "LINEAR" : "RADIX",
743 direct
? "(DIRECT)" : "");
744 seq_printf(m
, "%s\n", desc
->irq_data
.domain
->name
);
747 raw_spin_unlock_irqrestore(&desc
->lock
, flags
);
753 static int virq_debug_open(struct inode
*inode
, struct file
*file
)
755 return single_open(file
, virq_debug_show
, inode
->i_private
);
758 static const struct file_operations virq_debug_fops
= {
759 .open
= virq_debug_open
,
762 .release
= single_release
,
765 static int __init
irq_debugfs_init(void)
767 if (debugfs_create_file("irq_domain_mapping", S_IRUGO
, NULL
,
768 NULL
, &virq_debug_fops
) == NULL
)
773 __initcall(irq_debugfs_init
);
774 #endif /* CONFIG_IRQ_DOMAIN_DEBUG */
777 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
779 * Device Tree IRQ specifier translation function which works with one cell
780 * bindings where the cell value maps directly to the hwirq number.
782 int irq_domain_xlate_onecell(struct irq_domain
*d
, struct device_node
*ctrlr
,
783 const u32
*intspec
, unsigned int intsize
,
784 unsigned long *out_hwirq
, unsigned int *out_type
)
786 if (WARN_ON(intsize
< 1))
788 *out_hwirq
= intspec
[0];
789 *out_type
= IRQ_TYPE_NONE
;
792 EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell
);
795 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings
797 * Device Tree IRQ specifier translation function which works with two cell
798 * bindings where the cell values map directly to the hwirq number
799 * and linux irq flags.
801 int irq_domain_xlate_twocell(struct irq_domain
*d
, struct device_node
*ctrlr
,
802 const u32
*intspec
, unsigned int intsize
,
803 irq_hw_number_t
*out_hwirq
, unsigned int *out_type
)
805 if (WARN_ON(intsize
< 2))
807 *out_hwirq
= intspec
[0];
808 *out_type
= intspec
[1] & IRQ_TYPE_SENSE_MASK
;
811 EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell
);
814 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings
816 * Device Tree IRQ specifier translation function which works with either one
817 * or two cell bindings where the cell values map directly to the hwirq number
818 * and linux irq flags.
820 * Note: don't use this function unless your interrupt controller explicitly
821 * supports both one and two cell bindings. For the majority of controllers
822 * the _onecell() or _twocell() variants above should be used.
824 int irq_domain_xlate_onetwocell(struct irq_domain
*d
,
825 struct device_node
*ctrlr
,
826 const u32
*intspec
, unsigned int intsize
,
827 unsigned long *out_hwirq
, unsigned int *out_type
)
829 if (WARN_ON(intsize
< 1))
831 *out_hwirq
= intspec
[0];
832 *out_type
= (intsize
> 1) ? intspec
[1] : IRQ_TYPE_NONE
;
835 EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell
);
837 const struct irq_domain_ops irq_domain_simple_ops
= {
838 .xlate
= irq_domain_xlate_onetwocell
,
840 EXPORT_SYMBOL_GPL(irq_domain_simple_ops
);
842 int irq_domain_alloc_descs(int virq
, unsigned int cnt
, irq_hw_number_t hwirq
,
848 virq
= irq_alloc_descs(virq
, virq
, cnt
, node
);
850 hint
= hwirq
% nr_irqs
;
853 virq
= irq_alloc_descs_from(hint
, cnt
, node
);
854 if (virq
<= 0 && hint
> 1)
855 virq
= irq_alloc_descs_from(1, cnt
, node
);
861 #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
863 * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy
864 * @parent: Parent irq domain to associate with the new domain
865 * @flags: Irq domain flags associated to the domain
866 * @size: Size of the domain. See below
867 * @fwnode: Optional fwnode of the interrupt controller
868 * @ops: Pointer to the interrupt domain callbacks
869 * @host_data: Controller private data pointer
871 * If @size is 0 a tree domain is created, otherwise a linear domain.
873 * If successful the parent is associated to the new domain and the
874 * domain flags are set.
875 * Returns pointer to IRQ domain, or NULL on failure.
877 struct irq_domain
*irq_domain_create_hierarchy(struct irq_domain
*parent
,
880 struct fwnode_handle
*fwnode
,
881 const struct irq_domain_ops
*ops
,
884 struct irq_domain
*domain
;
887 domain
= irq_domain_create_linear(fwnode
, size
, ops
, host_data
);
889 domain
= irq_domain_create_tree(fwnode
, ops
, host_data
);
891 domain
->parent
= parent
;
892 domain
->flags
|= flags
;
897 EXPORT_SYMBOL_GPL(irq_domain_create_hierarchy
);
899 static void irq_domain_insert_irq(int virq
)
901 struct irq_data
*data
;
903 for (data
= irq_get_irq_data(virq
); data
; data
= data
->parent_data
) {
904 struct irq_domain
*domain
= data
->domain
;
905 irq_hw_number_t hwirq
= data
->hwirq
;
907 if (hwirq
< domain
->revmap_size
) {
908 domain
->linear_revmap
[hwirq
] = virq
;
910 mutex_lock(&revmap_trees_mutex
);
911 radix_tree_insert(&domain
->revmap_tree
, hwirq
, data
);
912 mutex_unlock(&revmap_trees_mutex
);
915 /* If not already assigned, give the domain the chip's name */
916 if (!domain
->name
&& data
->chip
)
917 domain
->name
= data
->chip
->name
;
920 irq_clear_status_flags(virq
, IRQ_NOREQUEST
);
923 static void irq_domain_remove_irq(int virq
)
925 struct irq_data
*data
;
927 irq_set_status_flags(virq
, IRQ_NOREQUEST
);
928 irq_set_chip_and_handler(virq
, NULL
, NULL
);
929 synchronize_irq(virq
);
932 for (data
= irq_get_irq_data(virq
); data
; data
= data
->parent_data
) {
933 struct irq_domain
*domain
= data
->domain
;
934 irq_hw_number_t hwirq
= data
->hwirq
;
936 if (hwirq
< domain
->revmap_size
) {
937 domain
->linear_revmap
[hwirq
] = 0;
939 mutex_lock(&revmap_trees_mutex
);
940 radix_tree_delete(&domain
->revmap_tree
, hwirq
);
941 mutex_unlock(&revmap_trees_mutex
);
946 static struct irq_data
*irq_domain_insert_irq_data(struct irq_domain
*domain
,
947 struct irq_data
*child
)
949 struct irq_data
*irq_data
;
951 irq_data
= kzalloc_node(sizeof(*irq_data
), GFP_KERNEL
,
952 irq_data_get_node(child
));
954 child
->parent_data
= irq_data
;
955 irq_data
->irq
= child
->irq
;
956 irq_data
->common
= child
->common
;
957 irq_data
->domain
= domain
;
963 static void irq_domain_free_irq_data(unsigned int virq
, unsigned int nr_irqs
)
965 struct irq_data
*irq_data
, *tmp
;
968 for (i
= 0; i
< nr_irqs
; i
++) {
969 irq_data
= irq_get_irq_data(virq
+ i
);
970 tmp
= irq_data
->parent_data
;
971 irq_data
->parent_data
= NULL
;
972 irq_data
->domain
= NULL
;
976 tmp
= tmp
->parent_data
;
982 static int irq_domain_alloc_irq_data(struct irq_domain
*domain
,
983 unsigned int virq
, unsigned int nr_irqs
)
985 struct irq_data
*irq_data
;
986 struct irq_domain
*parent
;
989 /* The outermost irq_data is embedded in struct irq_desc */
990 for (i
= 0; i
< nr_irqs
; i
++) {
991 irq_data
= irq_get_irq_data(virq
+ i
);
992 irq_data
->domain
= domain
;
994 for (parent
= domain
->parent
; parent
; parent
= parent
->parent
) {
995 irq_data
= irq_domain_insert_irq_data(parent
, irq_data
);
997 irq_domain_free_irq_data(virq
, i
+ 1);
1007 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1008 * @domain: domain to match
1009 * @virq: IRQ number to get irq_data
1011 struct irq_data
*irq_domain_get_irq_data(struct irq_domain
*domain
,
1014 struct irq_data
*irq_data
;
1016 for (irq_data
= irq_get_irq_data(virq
); irq_data
;
1017 irq_data
= irq_data
->parent_data
)
1018 if (irq_data
->domain
== domain
)
1023 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data
);
1026 * irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain
1027 * @domain: Interrupt domain to match
1029 * @hwirq: The hwirq number
1030 * @chip: The associated interrupt chip
1031 * @chip_data: The associated chip data
1033 int irq_domain_set_hwirq_and_chip(struct irq_domain
*domain
, unsigned int virq
,
1034 irq_hw_number_t hwirq
, struct irq_chip
*chip
,
1037 struct irq_data
*irq_data
= irq_domain_get_irq_data(domain
, virq
);
1042 irq_data
->hwirq
= hwirq
;
1043 irq_data
->chip
= chip
? chip
: &no_irq_chip
;
1044 irq_data
->chip_data
= chip_data
;
1048 EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip
);
1051 * irq_domain_set_info - Set the complete data for a @virq in @domain
1052 * @domain: Interrupt domain to match
1054 * @hwirq: The hardware interrupt number
1055 * @chip: The associated interrupt chip
1056 * @chip_data: The associated interrupt chip data
1057 * @handler: The interrupt flow handler
1058 * @handler_data: The interrupt flow handler data
1059 * @handler_name: The interrupt handler name
1061 void irq_domain_set_info(struct irq_domain
*domain
, unsigned int virq
,
1062 irq_hw_number_t hwirq
, struct irq_chip
*chip
,
1063 void *chip_data
, irq_flow_handler_t handler
,
1064 void *handler_data
, const char *handler_name
)
1066 irq_domain_set_hwirq_and_chip(domain
, virq
, hwirq
, chip
, chip_data
);
1067 __irq_set_handler(virq
, handler
, 0, handler_name
);
1068 irq_set_handler_data(virq
, handler_data
);
1070 EXPORT_SYMBOL(irq_domain_set_info
);
1073 * irq_domain_reset_irq_data - Clear hwirq, chip and chip_data in @irq_data
1074 * @irq_data: The pointer to irq_data
1076 void irq_domain_reset_irq_data(struct irq_data
*irq_data
)
1078 irq_data
->hwirq
= 0;
1079 irq_data
->chip
= &no_irq_chip
;
1080 irq_data
->chip_data
= NULL
;
1082 EXPORT_SYMBOL_GPL(irq_domain_reset_irq_data
);
1085 * irq_domain_free_irqs_common - Clear irq_data and free the parent
1086 * @domain: Interrupt domain to match
1087 * @virq: IRQ number to start with
1088 * @nr_irqs: The number of irqs to free
1090 void irq_domain_free_irqs_common(struct irq_domain
*domain
, unsigned int virq
,
1091 unsigned int nr_irqs
)
1093 struct irq_data
*irq_data
;
1096 for (i
= 0; i
< nr_irqs
; i
++) {
1097 irq_data
= irq_domain_get_irq_data(domain
, virq
+ i
);
1099 irq_domain_reset_irq_data(irq_data
);
1101 irq_domain_free_irqs_parent(domain
, virq
, nr_irqs
);
1103 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_common
);
1106 * irq_domain_free_irqs_top - Clear handler and handler data, clear irqdata and free parent
1107 * @domain: Interrupt domain to match
1108 * @virq: IRQ number to start with
1109 * @nr_irqs: The number of irqs to free
1111 void irq_domain_free_irqs_top(struct irq_domain
*domain
, unsigned int virq
,
1112 unsigned int nr_irqs
)
1116 for (i
= 0; i
< nr_irqs
; i
++) {
1117 irq_set_handler_data(virq
+ i
, NULL
);
1118 irq_set_handler(virq
+ i
, NULL
);
1120 irq_domain_free_irqs_common(domain
, virq
, nr_irqs
);
1123 static bool irq_domain_is_auto_recursive(struct irq_domain
*domain
)
1125 return domain
->flags
& IRQ_DOMAIN_FLAG_AUTO_RECURSIVE
;
1128 static void irq_domain_free_irqs_recursive(struct irq_domain
*domain
,
1129 unsigned int irq_base
,
1130 unsigned int nr_irqs
)
1132 domain
->ops
->free(domain
, irq_base
, nr_irqs
);
1133 if (irq_domain_is_auto_recursive(domain
)) {
1134 BUG_ON(!domain
->parent
);
1135 irq_domain_free_irqs_recursive(domain
->parent
, irq_base
,
1140 int irq_domain_alloc_irqs_recursive(struct irq_domain
*domain
,
1141 unsigned int irq_base
,
1142 unsigned int nr_irqs
, void *arg
)
1145 struct irq_domain
*parent
= domain
->parent
;
1146 bool recursive
= irq_domain_is_auto_recursive(domain
);
1148 BUG_ON(recursive
&& !parent
);
1150 ret
= irq_domain_alloc_irqs_recursive(parent
, irq_base
,
1153 ret
= domain
->ops
->alloc(domain
, irq_base
, nr_irqs
, arg
);
1154 if (ret
< 0 && recursive
)
1155 irq_domain_free_irqs_recursive(parent
, irq_base
, nr_irqs
);
1161 * __irq_domain_alloc_irqs - Allocate IRQs from domain
1162 * @domain: domain to allocate from
1163 * @irq_base: allocate specified IRQ nubmer if irq_base >= 0
1164 * @nr_irqs: number of IRQs to allocate
1165 * @node: NUMA node id for memory allocation
1166 * @arg: domain specific argument
1167 * @realloc: IRQ descriptors have already been allocated if true
1169 * Allocate IRQ numbers and initialized all data structures to support
1170 * hierarchy IRQ domains.
1171 * Parameter @realloc is mainly to support legacy IRQs.
1172 * Returns error code or allocated IRQ number
1174 * The whole process to setup an IRQ has been split into two steps.
1175 * The first step, __irq_domain_alloc_irqs(), is to allocate IRQ
1176 * descriptor and required hardware resources. The second step,
1177 * irq_domain_activate_irq(), is to program hardwares with preallocated
1178 * resources. In this way, it's easier to rollback when failing to
1179 * allocate resources.
1181 int __irq_domain_alloc_irqs(struct irq_domain
*domain
, int irq_base
,
1182 unsigned int nr_irqs
, int node
, void *arg
,
1187 if (domain
== NULL
) {
1188 domain
= irq_default_domain
;
1189 if (WARN(!domain
, "domain is NULL; cannot allocate IRQ\n"))
1193 if (!domain
->ops
->alloc
) {
1194 pr_debug("domain->ops->alloc() is NULL\n");
1198 if (realloc
&& irq_base
>= 0) {
1201 virq
= irq_domain_alloc_descs(irq_base
, nr_irqs
, 0, node
);
1203 pr_debug("cannot allocate IRQ(base %d, count %d)\n",
1209 if (irq_domain_alloc_irq_data(domain
, virq
, nr_irqs
)) {
1210 pr_debug("cannot allocate memory for IRQ%d\n", virq
);
1215 mutex_lock(&irq_domain_mutex
);
1216 ret
= irq_domain_alloc_irqs_recursive(domain
, virq
, nr_irqs
, arg
);
1218 mutex_unlock(&irq_domain_mutex
);
1219 goto out_free_irq_data
;
1221 for (i
= 0; i
< nr_irqs
; i
++)
1222 irq_domain_insert_irq(virq
+ i
);
1223 mutex_unlock(&irq_domain_mutex
);
1228 irq_domain_free_irq_data(virq
, nr_irqs
);
1230 irq_free_descs(virq
, nr_irqs
);
1235 * irq_domain_free_irqs - Free IRQ number and associated data structures
1236 * @virq: base IRQ number
1237 * @nr_irqs: number of IRQs to free
1239 void irq_domain_free_irqs(unsigned int virq
, unsigned int nr_irqs
)
1241 struct irq_data
*data
= irq_get_irq_data(virq
);
1244 if (WARN(!data
|| !data
->domain
|| !data
->domain
->ops
->free
,
1245 "NULL pointer, cannot free irq\n"))
1248 mutex_lock(&irq_domain_mutex
);
1249 for (i
= 0; i
< nr_irqs
; i
++)
1250 irq_domain_remove_irq(virq
+ i
);
1251 irq_domain_free_irqs_recursive(data
->domain
, virq
, nr_irqs
);
1252 mutex_unlock(&irq_domain_mutex
);
1254 irq_domain_free_irq_data(virq
, nr_irqs
);
1255 irq_free_descs(virq
, nr_irqs
);
1259 * irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain
1260 * @irq_base: Base IRQ number
1261 * @nr_irqs: Number of IRQs to allocate
1262 * @arg: Allocation data (arch/domain specific)
1264 * Check whether the domain has been setup recursive. If not allocate
1265 * through the parent domain.
1267 int irq_domain_alloc_irqs_parent(struct irq_domain
*domain
,
1268 unsigned int irq_base
, unsigned int nr_irqs
,
1271 /* irq_domain_alloc_irqs_recursive() has called parent's alloc() */
1272 if (irq_domain_is_auto_recursive(domain
))
1275 domain
= domain
->parent
;
1277 return irq_domain_alloc_irqs_recursive(domain
, irq_base
,
1281 EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent
);
1284 * irq_domain_free_irqs_parent - Free interrupts from parent domain
1285 * @irq_base: Base IRQ number
1286 * @nr_irqs: Number of IRQs to free
1288 * Check whether the domain has been setup recursive. If not free
1289 * through the parent domain.
1291 void irq_domain_free_irqs_parent(struct irq_domain
*domain
,
1292 unsigned int irq_base
, unsigned int nr_irqs
)
1294 /* irq_domain_free_irqs_recursive() will call parent's free */
1295 if (!irq_domain_is_auto_recursive(domain
) && domain
->parent
)
1296 irq_domain_free_irqs_recursive(domain
->parent
, irq_base
,
1299 EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent
);
1302 * irq_domain_activate_irq - Call domain_ops->activate recursively to activate
1304 * @irq_data: outermost irq_data associated with interrupt
1306 * This is the second step to call domain_ops->activate to program interrupt
1307 * controllers, so the interrupt could actually get delivered.
1309 void irq_domain_activate_irq(struct irq_data
*irq_data
)
1311 if (irq_data
&& irq_data
->domain
) {
1312 struct irq_domain
*domain
= irq_data
->domain
;
1314 if (irq_data
->parent_data
)
1315 irq_domain_activate_irq(irq_data
->parent_data
);
1316 if (domain
->ops
->activate
)
1317 domain
->ops
->activate(domain
, irq_data
);
1322 * irq_domain_deactivate_irq - Call domain_ops->deactivate recursively to
1323 * deactivate interrupt
1324 * @irq_data: outermost irq_data associated with interrupt
1326 * It calls domain_ops->deactivate to program interrupt controllers to disable
1327 * interrupt delivery.
1329 void irq_domain_deactivate_irq(struct irq_data
*irq_data
)
1331 if (irq_data
&& irq_data
->domain
) {
1332 struct irq_domain
*domain
= irq_data
->domain
;
1334 if (domain
->ops
->deactivate
)
1335 domain
->ops
->deactivate(domain
, irq_data
);
1336 if (irq_data
->parent_data
)
1337 irq_domain_deactivate_irq(irq_data
->parent_data
);
1341 static void irq_domain_check_hierarchy(struct irq_domain
*domain
)
1343 /* Hierarchy irq_domains must implement callback alloc() */
1344 if (domain
->ops
->alloc
)
1345 domain
->flags
|= IRQ_DOMAIN_FLAG_HIERARCHY
;
1347 #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
1349 * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain
1350 * @domain: domain to match
1351 * @virq: IRQ number to get irq_data
1353 struct irq_data
*irq_domain_get_irq_data(struct irq_domain
*domain
,
1356 struct irq_data
*irq_data
= irq_get_irq_data(virq
);
1358 return (irq_data
&& irq_data
->domain
== domain
) ? irq_data
: NULL
;
1360 EXPORT_SYMBOL_GPL(irq_domain_get_irq_data
);
1363 * irq_domain_set_info - Set the complete data for a @virq in @domain
1364 * @domain: Interrupt domain to match
1366 * @hwirq: The hardware interrupt number
1367 * @chip: The associated interrupt chip
1368 * @chip_data: The associated interrupt chip data
1369 * @handler: The interrupt flow handler
1370 * @handler_data: The interrupt flow handler data
1371 * @handler_name: The interrupt handler name
1373 void irq_domain_set_info(struct irq_domain
*domain
, unsigned int virq
,
1374 irq_hw_number_t hwirq
, struct irq_chip
*chip
,
1375 void *chip_data
, irq_flow_handler_t handler
,
1376 void *handler_data
, const char *handler_name
)
1378 irq_set_chip_and_handler_name(virq
, chip
, handler
, handler_name
);
1379 irq_set_chip_data(virq
, chip_data
);
1380 irq_set_handler_data(virq
, handler_data
);
1383 static void irq_domain_check_hierarchy(struct irq_domain
*domain
)
1386 #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */