1 #define pr_fmt(fmt) "irq: " fmt
3 #include <linux/debugfs.h>
4 #include <linux/hardirq.h>
5 #include <linux/interrupt.h>
7 #include <linux/irqdesc.h>
8 #include <linux/irqdomain.h>
9 #include <linux/module.h>
10 #include <linux/mutex.h>
12 #include <linux/of_address.h>
13 #include <linux/topology.h>
14 #include <linux/seq_file.h>
15 #include <linux/slab.h>
16 #include <linux/smp.h>
19 #define IRQ_DOMAIN_MAP_LEGACY 0 /* driver allocated fixed range of irqs.
20 * ie. legacy 8259, gets irqs 1..15 */
21 #define IRQ_DOMAIN_MAP_NOMAP 1 /* no fast reverse mapping */
22 #define IRQ_DOMAIN_MAP_LINEAR 2 /* linear map of interrupts */
23 #define IRQ_DOMAIN_MAP_TREE 3 /* radix tree */
25 static LIST_HEAD(irq_domain_list
);
26 static DEFINE_MUTEX(irq_domain_mutex
);
28 static DEFINE_MUTEX(revmap_trees_mutex
);
29 static struct irq_domain
*irq_default_domain
;
32 * irq_domain_alloc() - Allocate a new irq_domain data structure
33 * @of_node: optional device-tree node of the interrupt controller
34 * @revmap_type: type of reverse mapping to use
35 * @ops: map/unmap domain callbacks
36 * @host_data: Controller private data pointer
38 * Allocates and initialize and irq_domain structure. Caller is expected to
39 * register allocated irq_domain with irq_domain_register(). Returns pointer
40 * to IRQ domain, or NULL on failure.
42 static struct irq_domain
*irq_domain_alloc(struct device_node
*of_node
,
43 unsigned int revmap_type
,
44 const struct irq_domain_ops
*ops
,
47 struct irq_domain
*domain
;
49 domain
= kzalloc_node(sizeof(*domain
), GFP_KERNEL
,
50 of_node_to_nid(of_node
));
55 domain
->revmap_type
= revmap_type
;
57 domain
->host_data
= host_data
;
58 domain
->of_node
= of_node_get(of_node
);
63 static void irq_domain_free(struct irq_domain
*domain
)
65 of_node_put(domain
->of_node
);
69 static void irq_domain_add(struct irq_domain
*domain
)
71 mutex_lock(&irq_domain_mutex
);
72 list_add(&domain
->link
, &irq_domain_list
);
73 mutex_unlock(&irq_domain_mutex
);
74 pr_debug("Allocated domain of type %d @0x%p\n",
75 domain
->revmap_type
, domain
);
79 * irq_domain_remove() - Remove an irq domain.
80 * @domain: domain to remove
82 * This routine is used to remove an irq domain. The caller must ensure
83 * that all mappings within the domain have been disposed of prior to
84 * use, depending on the revmap type.
86 void irq_domain_remove(struct irq_domain
*domain
)
88 mutex_lock(&irq_domain_mutex
);
90 switch (domain
->revmap_type
) {
91 case IRQ_DOMAIN_MAP_LEGACY
:
93 * Legacy domains don't manage their own irq_desc
94 * allocations, we expect the caller to handle irq_desc
95 * freeing on their own.
98 case IRQ_DOMAIN_MAP_TREE
:
100 * radix_tree_delete() takes care of destroying the root
101 * node when all entries are removed. Shout if there are
104 WARN_ON(domain
->revmap_data
.tree
.height
);
106 case IRQ_DOMAIN_MAP_LINEAR
:
107 kfree(domain
->revmap_data
.linear
.revmap
);
108 domain
->revmap_data
.linear
.size
= 0;
110 case IRQ_DOMAIN_MAP_NOMAP
:
114 list_del(&domain
->link
);
117 * If the going away domain is the default one, reset it.
119 if (unlikely(irq_default_domain
== domain
))
120 irq_set_default_host(NULL
);
122 mutex_unlock(&irq_domain_mutex
);
124 pr_debug("Removed domain of type %d @0x%p\n",
125 domain
->revmap_type
, domain
);
127 irq_domain_free(domain
);
129 EXPORT_SYMBOL_GPL(irq_domain_remove
);
131 static unsigned int irq_domain_legacy_revmap(struct irq_domain
*domain
,
132 irq_hw_number_t hwirq
)
134 irq_hw_number_t first_hwirq
= domain
->revmap_data
.legacy
.first_hwirq
;
135 int size
= domain
->revmap_data
.legacy
.size
;
137 if (WARN_ON(hwirq
< first_hwirq
|| hwirq
>= first_hwirq
+ size
))
139 return hwirq
- first_hwirq
+ domain
->revmap_data
.legacy
.first_irq
;
143 * irq_domain_add_simple() - Allocate and register a simple irq_domain.
144 * @of_node: pointer to interrupt controller's device tree node.
145 * @size: total number of irqs in mapping
146 * @first_irq: first number of irq block assigned to the domain
147 * @ops: map/unmap domain callbacks
148 * @host_data: Controller private data pointer
150 * Allocates a legacy irq_domain if irq_base is positive or a linear
151 * domain otherwise. For the legacy domain, IRQ descriptors will also
154 * This is intended to implement the expected behaviour for most
155 * interrupt controllers which is that a linear mapping should
156 * normally be used unless the system requires a legacy mapping in
157 * order to support supplying interrupt numbers during non-DT
158 * registration of devices.
160 struct irq_domain
*irq_domain_add_simple(struct device_node
*of_node
,
162 unsigned int first_irq
,
163 const struct irq_domain_ops
*ops
,
169 if (IS_ENABLED(CONFIG_SPARSE_IRQ
)) {
171 * Set the descriptor allocator to search for a
172 * 1-to-1 mapping, such as irq_alloc_desc_at().
173 * Use of_node_to_nid() which is defined to
174 * numa_node_id() on platforms that have no custom
177 irq_base
= irq_alloc_descs(first_irq
, first_irq
, size
,
178 of_node_to_nid(of_node
));
180 pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
182 irq_base
= first_irq
;
185 irq_base
= first_irq
;
187 return irq_domain_add_legacy(of_node
, size
, irq_base
, 0,
191 /* A linear domain is the default */
192 return irq_domain_add_linear(of_node
, size
, ops
, host_data
);
196 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain.
197 * @of_node: pointer to interrupt controller's device tree node.
198 * @size: total number of irqs in legacy mapping
199 * @first_irq: first number of irq block assigned to the domain
200 * @first_hwirq: first hwirq number to use for the translation. Should normally
201 * be '0', but a positive integer can be used if the effective
202 * hwirqs numbering does not begin at zero.
203 * @ops: map/unmap domain callbacks
204 * @host_data: Controller private data pointer
206 * Note: the map() callback will be called before this function returns
207 * for all legacy interrupts except 0 (which is always the invalid irq for
208 * a legacy controller).
210 struct irq_domain
*irq_domain_add_legacy(struct device_node
*of_node
,
212 unsigned int first_irq
,
213 irq_hw_number_t first_hwirq
,
214 const struct irq_domain_ops
*ops
,
217 struct irq_domain
*domain
;
220 domain
= irq_domain_alloc(of_node
, IRQ_DOMAIN_MAP_LEGACY
, ops
, host_data
);
224 domain
->revmap_data
.legacy
.first_irq
= first_irq
;
225 domain
->revmap_data
.legacy
.first_hwirq
= first_hwirq
;
226 domain
->revmap_data
.legacy
.size
= size
;
228 mutex_lock(&irq_domain_mutex
);
229 /* Verify that all the irqs are available */
230 for (i
= 0; i
< size
; i
++) {
231 int irq
= first_irq
+ i
;
232 struct irq_data
*irq_data
= irq_get_irq_data(irq
);
234 if (WARN_ON(!irq_data
|| irq_data
->domain
)) {
235 mutex_unlock(&irq_domain_mutex
);
236 irq_domain_free(domain
);
241 /* Claim all of the irqs before registering a legacy domain */
242 for (i
= 0; i
< size
; i
++) {
243 struct irq_data
*irq_data
= irq_get_irq_data(first_irq
+ i
);
244 irq_data
->hwirq
= first_hwirq
+ i
;
245 irq_data
->domain
= domain
;
247 mutex_unlock(&irq_domain_mutex
);
249 for (i
= 0; i
< size
; i
++) {
250 int irq
= first_irq
+ i
;
251 int hwirq
= first_hwirq
+ i
;
253 /* IRQ0 gets ignored */
257 /* Legacy flags are left to default at this point,
258 * one can then use irq_create_mapping() to
259 * explicitly change them
262 ops
->map(domain
, irq
, hwirq
);
264 /* Clear norequest flags */
265 irq_clear_status_flags(irq
, IRQ_NOREQUEST
);
268 irq_domain_add(domain
);
271 EXPORT_SYMBOL_GPL(irq_domain_add_legacy
);
274 * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain.
275 * @of_node: pointer to interrupt controller's device tree node.
276 * @size: Number of interrupts in the domain.
277 * @ops: map/unmap domain callbacks
278 * @host_data: Controller private data pointer
280 struct irq_domain
*irq_domain_add_linear(struct device_node
*of_node
,
282 const struct irq_domain_ops
*ops
,
285 struct irq_domain
*domain
;
286 unsigned int *revmap
;
288 revmap
= kzalloc_node(sizeof(*revmap
) * size
, GFP_KERNEL
,
289 of_node_to_nid(of_node
));
290 if (WARN_ON(!revmap
))
293 domain
= irq_domain_alloc(of_node
, IRQ_DOMAIN_MAP_LINEAR
, ops
, host_data
);
298 domain
->revmap_data
.linear
.size
= size
;
299 domain
->revmap_data
.linear
.revmap
= revmap
;
300 irq_domain_add(domain
);
303 EXPORT_SYMBOL_GPL(irq_domain_add_linear
);
305 struct irq_domain
*irq_domain_add_nomap(struct device_node
*of_node
,
306 unsigned int max_irq
,
307 const struct irq_domain_ops
*ops
,
310 struct irq_domain
*domain
= irq_domain_alloc(of_node
,
311 IRQ_DOMAIN_MAP_NOMAP
, ops
, host_data
);
313 domain
->revmap_data
.nomap
.max_irq
= max_irq
? max_irq
: ~0;
314 irq_domain_add(domain
);
318 EXPORT_SYMBOL_GPL(irq_domain_add_nomap
);
321 * irq_domain_add_tree()
322 * @of_node: pointer to interrupt controller's device tree node.
323 * @ops: map/unmap domain callbacks
325 * Note: The radix tree will be allocated later during boot automatically
326 * (the reverse mapping will use the slow path until that happens).
328 struct irq_domain
*irq_domain_add_tree(struct device_node
*of_node
,
329 const struct irq_domain_ops
*ops
,
332 struct irq_domain
*domain
= irq_domain_alloc(of_node
,
333 IRQ_DOMAIN_MAP_TREE
, ops
, host_data
);
335 INIT_RADIX_TREE(&domain
->revmap_data
.tree
, GFP_KERNEL
);
336 irq_domain_add(domain
);
340 EXPORT_SYMBOL_GPL(irq_domain_add_tree
);
343 * irq_find_host() - Locates a domain for a given device node
344 * @node: device-tree node of the interrupt controller
346 struct irq_domain
*irq_find_host(struct device_node
*node
)
348 struct irq_domain
*h
, *found
= NULL
;
351 /* We might want to match the legacy controller last since
352 * it might potentially be set to match all interrupts in
353 * the absence of a device node. This isn't a problem so far
356 mutex_lock(&irq_domain_mutex
);
357 list_for_each_entry(h
, &irq_domain_list
, link
) {
359 rc
= h
->ops
->match(h
, node
);
361 rc
= (h
->of_node
!= NULL
) && (h
->of_node
== node
);
368 mutex_unlock(&irq_domain_mutex
);
371 EXPORT_SYMBOL_GPL(irq_find_host
);
374 * irq_set_default_host() - Set a "default" irq domain
375 * @domain: default domain pointer
377 * For convenience, it's possible to set a "default" domain that will be used
378 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
379 * platforms that want to manipulate a few hard coded interrupt numbers that
380 * aren't properly represented in the device-tree.
382 void irq_set_default_host(struct irq_domain
*domain
)
384 pr_debug("Default domain set to @0x%p\n", domain
);
386 irq_default_domain
= domain
;
388 EXPORT_SYMBOL_GPL(irq_set_default_host
);
390 static void irq_domain_disassociate_many(struct irq_domain
*domain
,
391 unsigned int irq_base
, int count
)
394 * disassociate in reverse order;
395 * not strictly necessary, but nice for unwinding
398 int irq
= irq_base
+ count
;
399 struct irq_data
*irq_data
= irq_get_irq_data(irq
);
400 irq_hw_number_t hwirq
= irq_data
->hwirq
;
402 if (WARN_ON(!irq_data
|| irq_data
->domain
!= domain
))
405 irq_set_status_flags(irq
, IRQ_NOREQUEST
);
407 /* remove chip and handler */
408 irq_set_chip_and_handler(irq
, NULL
, NULL
);
410 /* Make sure it's completed */
411 synchronize_irq(irq
);
413 /* Tell the PIC about it */
414 if (domain
->ops
->unmap
)
415 domain
->ops
->unmap(domain
, irq
);
418 irq_data
->domain
= NULL
;
421 /* Clear reverse map */
422 switch(domain
->revmap_type
) {
423 case IRQ_DOMAIN_MAP_LINEAR
:
424 if (hwirq
< domain
->revmap_data
.linear
.size
)
425 domain
->revmap_data
.linear
.revmap
[hwirq
] = 0;
427 case IRQ_DOMAIN_MAP_TREE
:
428 mutex_lock(&revmap_trees_mutex
);
429 radix_tree_delete(&domain
->revmap_data
.tree
, hwirq
);
430 mutex_unlock(&revmap_trees_mutex
);
436 int irq_domain_associate_many(struct irq_domain
*domain
, unsigned int irq_base
,
437 irq_hw_number_t hwirq_base
, int count
)
439 unsigned int virq
= irq_base
;
440 irq_hw_number_t hwirq
= hwirq_base
;
443 pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__
,
444 of_node_full_name(domain
->of_node
), irq_base
, (int)hwirq_base
, count
);
446 for (i
= 0; i
< count
; i
++) {
447 struct irq_data
*irq_data
= irq_get_irq_data(virq
+ i
);
449 if (WARN(!irq_data
, "error: irq_desc not allocated; "
450 "irq=%i hwirq=0x%x\n", virq
+ i
, (int)hwirq
+ i
))
452 if (WARN(irq_data
->domain
, "error: irq_desc already associated; "
453 "irq=%i hwirq=0x%x\n", virq
+ i
, (int)hwirq
+ i
))
457 for (i
= 0; i
< count
; i
++, virq
++, hwirq
++) {
458 struct irq_data
*irq_data
= irq_get_irq_data(virq
);
460 irq_data
->hwirq
= hwirq
;
461 irq_data
->domain
= domain
;
462 if (domain
->ops
->map
) {
463 ret
= domain
->ops
->map(domain
, virq
, hwirq
);
466 * If map() returns -EPERM, this interrupt is protected
467 * by the firmware or some other service and shall not
470 * Since on some platforms we blindly try to map everything
471 * we end up with a log full of backtraces.
473 * So instead, we silently fail on -EPERM, it is the
474 * responsibility of the PIC driver to display a relevant
478 pr_err("irq-%i==>hwirq-0x%lx mapping failed: %d\n",
482 irq_data
->domain
= NULL
;
488 switch (domain
->revmap_type
) {
489 case IRQ_DOMAIN_MAP_LINEAR
:
490 if (hwirq
< domain
->revmap_data
.linear
.size
)
491 domain
->revmap_data
.linear
.revmap
[hwirq
] = virq
;
493 case IRQ_DOMAIN_MAP_TREE
:
494 mutex_lock(&revmap_trees_mutex
);
495 radix_tree_insert(&domain
->revmap_data
.tree
, hwirq
, irq_data
);
496 mutex_unlock(&revmap_trees_mutex
);
500 irq_clear_status_flags(virq
, IRQ_NOREQUEST
);
506 irq_domain_disassociate_many(domain
, irq_base
, i
);
509 EXPORT_SYMBOL_GPL(irq_domain_associate_many
);
512 * irq_create_direct_mapping() - Allocate an irq for direct mapping
513 * @domain: domain to allocate the irq for or NULL for default domain
515 * This routine is used for irq controllers which can choose the hardware
516 * interrupt numbers they generate. In such a case it's simplest to use
517 * the linux irq as the hardware interrupt number.
519 unsigned int irq_create_direct_mapping(struct irq_domain
*domain
)
524 domain
= irq_default_domain
;
526 if (WARN_ON(!domain
|| domain
->revmap_type
!= IRQ_DOMAIN_MAP_NOMAP
))
529 virq
= irq_alloc_desc_from(1, of_node_to_nid(domain
->of_node
));
531 pr_debug("create_direct virq allocation failed\n");
534 if (virq
>= domain
->revmap_data
.nomap
.max_irq
) {
535 pr_err("ERROR: no free irqs available below %i maximum\n",
536 domain
->revmap_data
.nomap
.max_irq
);
540 pr_debug("create_direct obtained virq %d\n", virq
);
542 if (irq_domain_associate(domain
, virq
, virq
)) {
549 EXPORT_SYMBOL_GPL(irq_create_direct_mapping
);
552 * irq_create_mapping() - Map a hardware interrupt into linux irq space
553 * @domain: domain owning this hardware interrupt or NULL for default domain
554 * @hwirq: hardware irq number in that domain space
556 * Only one mapping per hardware interrupt is permitted. Returns a linux
558 * If the sense/trigger is to be specified, set_irq_type() should be called
559 * on the number returned from that call.
561 unsigned int irq_create_mapping(struct irq_domain
*domain
,
562 irq_hw_number_t hwirq
)
567 pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain
, hwirq
);
569 /* Look for default domain if nececssary */
571 domain
= irq_default_domain
;
572 if (domain
== NULL
) {
573 pr_warning("irq_create_mapping called for"
574 " NULL domain, hwirq=%lx\n", hwirq
);
578 pr_debug("-> using domain @%p\n", domain
);
580 /* Check if mapping already exists */
581 virq
= irq_find_mapping(domain
, hwirq
);
583 pr_debug("-> existing mapping on virq %d\n", virq
);
587 /* Get a virtual interrupt number */
588 if (domain
->revmap_type
== IRQ_DOMAIN_MAP_LEGACY
)
589 return irq_domain_legacy_revmap(domain
, hwirq
);
591 /* Allocate a virtual interrupt number */
592 hint
= hwirq
% nr_irqs
;
595 virq
= irq_alloc_desc_from(hint
, of_node_to_nid(domain
->of_node
));
597 virq
= irq_alloc_desc_from(1, of_node_to_nid(domain
->of_node
));
599 pr_debug("-> virq allocation failed\n");
603 if (irq_domain_associate(domain
, virq
, hwirq
)) {
608 pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
609 hwirq
, of_node_full_name(domain
->of_node
), virq
);
613 EXPORT_SYMBOL_GPL(irq_create_mapping
);
616 * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs
617 * @domain: domain owning the interrupt range
618 * @irq_base: beginning of linux IRQ range
619 * @hwirq_base: beginning of hardware IRQ range
620 * @count: Number of interrupts to map
622 * This routine is used for allocating and mapping a range of hardware
623 * irqs to linux irqs where the linux irq numbers are at pre-defined
624 * locations. For use by controllers that already have static mappings
625 * to insert in to the domain.
627 * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time
630 * 0 is returned upon success, while any failure to establish a static
631 * mapping is treated as an error.
633 int irq_create_strict_mappings(struct irq_domain
*domain
, unsigned int irq_base
,
634 irq_hw_number_t hwirq_base
, int count
)
638 ret
= irq_alloc_descs(irq_base
, irq_base
, count
,
639 of_node_to_nid(domain
->of_node
));
640 if (unlikely(ret
< 0))
643 ret
= irq_domain_associate_many(domain
, irq_base
, hwirq_base
, count
);
644 if (unlikely(ret
< 0)) {
645 irq_free_descs(irq_base
, count
);
651 EXPORT_SYMBOL_GPL(irq_create_strict_mappings
);
653 unsigned int irq_create_of_mapping(struct device_node
*controller
,
654 const u32
*intspec
, unsigned int intsize
)
656 struct irq_domain
*domain
;
657 irq_hw_number_t hwirq
;
658 unsigned int type
= IRQ_TYPE_NONE
;
661 domain
= controller
? irq_find_host(controller
) : irq_default_domain
;
665 * Workaround to avoid breaking interrupt controller drivers
666 * that don't yet register an irq_domain. This is temporary
667 * code. ~~~gcl, Feb 24, 2012
669 * Scheduled for removal in Linux v3.6. That should be enough
675 pr_warning("no irq domain found for %s !\n",
676 of_node_full_name(controller
));
680 /* If domain has no translation, then we assume interrupt line */
681 if (domain
->ops
->xlate
== NULL
)
684 if (domain
->ops
->xlate(domain
, controller
, intspec
, intsize
,
690 virq
= irq_create_mapping(domain
, hwirq
);
694 /* Set type if specified and different than the current one */
695 if (type
!= IRQ_TYPE_NONE
&&
696 type
!= (irqd_get_trigger_type(irq_get_irq_data(virq
))))
697 irq_set_irq_type(virq
, type
);
700 EXPORT_SYMBOL_GPL(irq_create_of_mapping
);
703 * irq_dispose_mapping() - Unmap an interrupt
704 * @virq: linux irq number of the interrupt to unmap
706 void irq_dispose_mapping(unsigned int virq
)
708 struct irq_data
*irq_data
= irq_get_irq_data(virq
);
709 struct irq_domain
*domain
;
711 if (!virq
|| !irq_data
)
714 domain
= irq_data
->domain
;
715 if (WARN_ON(domain
== NULL
))
718 /* Never unmap legacy interrupts */
719 if (domain
->revmap_type
== IRQ_DOMAIN_MAP_LEGACY
)
722 irq_domain_disassociate_many(domain
, virq
, 1);
725 EXPORT_SYMBOL_GPL(irq_dispose_mapping
);
728 * irq_find_mapping() - Find a linux irq from an hw irq number.
729 * @domain: domain owning this hardware interrupt
730 * @hwirq: hardware irq number in that domain space
732 unsigned int irq_find_mapping(struct irq_domain
*domain
,
733 irq_hw_number_t hwirq
)
735 struct irq_data
*data
;
737 /* Look for default domain if nececssary */
739 domain
= irq_default_domain
;
743 switch (domain
->revmap_type
) {
744 case IRQ_DOMAIN_MAP_LEGACY
:
745 return irq_domain_legacy_revmap(domain
, hwirq
);
746 case IRQ_DOMAIN_MAP_LINEAR
:
747 return irq_linear_revmap(domain
, hwirq
);
748 case IRQ_DOMAIN_MAP_TREE
:
750 data
= radix_tree_lookup(&domain
->revmap_data
.tree
, hwirq
);
755 case IRQ_DOMAIN_MAP_NOMAP
:
756 data
= irq_get_irq_data(hwirq
);
757 if (data
&& (data
->domain
== domain
) && (data
->hwirq
== hwirq
))
764 EXPORT_SYMBOL_GPL(irq_find_mapping
);
767 * irq_linear_revmap() - Find a linux irq from a hw irq number.
768 * @domain: domain owning this hardware interrupt
769 * @hwirq: hardware irq number in that domain space
771 * This is a fast path that can be called directly by irq controller code to
772 * save a handful of instructions.
774 unsigned int irq_linear_revmap(struct irq_domain
*domain
,
775 irq_hw_number_t hwirq
)
777 BUG_ON(domain
->revmap_type
!= IRQ_DOMAIN_MAP_LINEAR
);
779 /* Check revmap bounds; complain if exceeded */
780 if (WARN_ON(hwirq
>= domain
->revmap_data
.linear
.size
))
783 return domain
->revmap_data
.linear
.revmap
[hwirq
];
785 EXPORT_SYMBOL_GPL(irq_linear_revmap
);
787 #ifdef CONFIG_IRQ_DOMAIN_DEBUG
788 static int virq_debug_show(struct seq_file
*m
, void *private)
791 struct irq_desc
*desc
;
793 static const char none
[] = "none";
797 seq_printf(m
, "%-5s %-7s %-15s %-*s %s\n", "irq", "hwirq",
798 "chip name", (int)(2 * sizeof(void *) + 2), "chip data",
801 for (i
= 1; i
< nr_irqs
; i
++) {
802 desc
= irq_to_desc(i
);
806 raw_spin_lock_irqsave(&desc
->lock
, flags
);
808 if (desc
->action
&& desc
->action
->handler
) {
809 struct irq_chip
*chip
;
811 seq_printf(m
, "%5d ", i
);
812 seq_printf(m
, "0x%05lx ", desc
->irq_data
.hwirq
);
814 chip
= irq_desc_get_chip(desc
);
815 if (chip
&& chip
->name
)
819 seq_printf(m
, "%-15s ", p
);
821 data
= irq_desc_get_chip_data(desc
);
822 seq_printf(m
, data
? "0x%p " : " %p ", data
);
824 if (desc
->irq_data
.domain
)
825 p
= of_node_full_name(desc
->irq_data
.domain
->of_node
);
828 seq_printf(m
, "%s\n", p
);
831 raw_spin_unlock_irqrestore(&desc
->lock
, flags
);
837 static int virq_debug_open(struct inode
*inode
, struct file
*file
)
839 return single_open(file
, virq_debug_show
, inode
->i_private
);
842 static const struct file_operations virq_debug_fops
= {
843 .open
= virq_debug_open
,
846 .release
= single_release
,
849 static int __init
irq_debugfs_init(void)
851 if (debugfs_create_file("irq_domain_mapping", S_IRUGO
, NULL
,
852 NULL
, &virq_debug_fops
) == NULL
)
857 __initcall(irq_debugfs_init
);
858 #endif /* CONFIG_IRQ_DOMAIN_DEBUG */
861 * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings
863 * Device Tree IRQ specifier translation function which works with one cell
864 * bindings where the cell value maps directly to the hwirq number.
866 int irq_domain_xlate_onecell(struct irq_domain
*d
, struct device_node
*ctrlr
,
867 const u32
*intspec
, unsigned int intsize
,
868 unsigned long *out_hwirq
, unsigned int *out_type
)
870 if (WARN_ON(intsize
< 1))
872 *out_hwirq
= intspec
[0];
873 *out_type
= IRQ_TYPE_NONE
;
876 EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell
);
879 * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings
881 * Device Tree IRQ specifier translation function which works with two cell
882 * bindings where the cell values map directly to the hwirq number
883 * and linux irq flags.
885 int irq_domain_xlate_twocell(struct irq_domain
*d
, struct device_node
*ctrlr
,
886 const u32
*intspec
, unsigned int intsize
,
887 irq_hw_number_t
*out_hwirq
, unsigned int *out_type
)
889 if (WARN_ON(intsize
< 2))
891 *out_hwirq
= intspec
[0];
892 *out_type
= intspec
[1] & IRQ_TYPE_SENSE_MASK
;
895 EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell
);
898 * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings
900 * Device Tree IRQ specifier translation function which works with either one
901 * or two cell bindings where the cell values map directly to the hwirq number
902 * and linux irq flags.
904 * Note: don't use this function unless your interrupt controller explicitly
905 * supports both one and two cell bindings. For the majority of controllers
906 * the _onecell() or _twocell() variants above should be used.
908 int irq_domain_xlate_onetwocell(struct irq_domain
*d
,
909 struct device_node
*ctrlr
,
910 const u32
*intspec
, unsigned int intsize
,
911 unsigned long *out_hwirq
, unsigned int *out_type
)
913 if (WARN_ON(intsize
< 1))
915 *out_hwirq
= intspec
[0];
916 *out_type
= (intsize
> 1) ? intspec
[1] : IRQ_TYPE_NONE
;
919 EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell
);
921 const struct irq_domain_ops irq_domain_simple_ops
= {
922 .xlate
= irq_domain_xlate_onetwocell
,
924 EXPORT_SYMBOL_GPL(irq_domain_simple_ops
);
927 void irq_domain_generate_simple(const struct of_device_id
*match
,
928 u64 phys_base
, unsigned int irq_start
)
930 struct device_node
*node
;
931 pr_debug("looking for phys_base=%llx, irq_start=%i\n",
932 (unsigned long long) phys_base
, (int) irq_start
);
933 node
= of_find_matching_node_by_address(NULL
, match
, phys_base
);
935 irq_domain_add_legacy(node
, 32, irq_start
, 0,
936 &irq_domain_simple_ops
, NULL
);
938 EXPORT_SYMBOL_GPL(irq_domain_generate_simple
);