1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * irq_domain - IRQ translation domains
4 *
5 * Translation infrastructure between hw and linux irq numbers. This is
6 * helpful for interrupt controllers to implement mapping between hardware
7 * irq numbers and the Linux irq number space.
8 *
9 * irq_domains also have hooks for translating device tree or other
10 * firmware interrupt representations into a hardware irq number that
11 * can be mapped back to a Linux irq number without any extra platform
12 * support code.
13 *
14 * Interrupt controller "domain" data structure. This could be defined as a
15 * irq domain controller. That is, it handles the mapping between hardware
16 * and virtual interrupt numbers for a given interrupt domain. The domain
17 * structure is generally created by the PIC code for a given PIC instance
18 * (though a domain can cover more than one PIC if they have a flat number
19 * model). It's the domain callbacks that are responsible for setting the
20 * irq_chip on a given irq_desc after it's been mapped.
21 *
22 * The host code and data structures use a fwnode_handle pointer to
23 * identify the domain. In some cases, and in order to preserve source
24 * code compatibility, this fwnode pointer is "upgraded" to a DT
25 * device_node. For those firmware infrastructures that do not provide
26 * a unique identifier for an interrupt controller, the irq_domain
27 * code offers a fwnode allocator.
28 */
29
30#ifndef _LINUX_IRQDOMAIN_H
31#define _LINUX_IRQDOMAIN_H
32
33#include <linux/types.h>
34#include <linux/irqdomain_defs.h>
35#include <linux/irqhandler.h>
36#include <linux/of.h>
37#include <linux/mutex.h>
38#include <linux/radix-tree.h>
39
40struct device_node;
41struct fwnode_handle;
42struct irq_domain;
43struct irq_chip;
44struct irq_data;
45struct irq_desc;
46struct cpumask;
47struct seq_file;
48struct irq_affinity_desc;
49struct msi_parent_ops;
50
51#define IRQ_DOMAIN_IRQ_SPEC_PARAMS 16
52
53/**
54 * struct irq_fwspec - generic IRQ specifier structure
55 *
56 * @fwnode: Pointer to a firmware-specific descriptor
57 * @param_count: Number of device-specific parameters
58 * @param: Device-specific parameters
59 *
60 * This structure, directly modeled after of_phandle_args, is used to
61 * pass a device-specific description of an interrupt.
62 */
63struct irq_fwspec {
64 struct fwnode_handle *fwnode;
65 int param_count;
66 u32 param[IRQ_DOMAIN_IRQ_SPEC_PARAMS];
67};
68
69/* Conversion function from of_phandle_args fields to fwspec */
70void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args,
71 unsigned int count, struct irq_fwspec *fwspec);
72
73/**
74 * struct irq_domain_ops - Methods for irq_domain objects
75 * @match: Match an interrupt controller device node to a host, returns
76 * 1 on a match
77 * @map: Create or update a mapping between a virtual irq number and a hw
78 * irq number. This is called only once for a given mapping.
79 * @unmap: Dispose of such a mapping
80 * @xlate: Given a device tree node and interrupt specifier, decode
81 * the hardware irq number and linux irq type value.
82 *
83 * Functions below are provided by the driver and called whenever a new mapping
84 * is created or an old mapping is disposed. The driver can then proceed to
85 * whatever internal data structures management is required. It also needs
86 * to setup the irq_desc when returning from map().
87 */
88struct irq_domain_ops {
89 int (*match)(struct irq_domain *d, struct device_node *node,
90 enum irq_domain_bus_token bus_token);
91 int (*select)(struct irq_domain *d, struct irq_fwspec *fwspec,
92 enum irq_domain_bus_token bus_token);
93 int (*map)(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw);
94 void (*unmap)(struct irq_domain *d, unsigned int virq);
95 int (*xlate)(struct irq_domain *d, struct device_node *node,
96 const u32 *intspec, unsigned int intsize,
97 unsigned long *out_hwirq, unsigned int *out_type);
98#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
99 /* extended V2 interfaces to support hierarchy irq_domains */
100 int (*alloc)(struct irq_domain *d, unsigned int virq,
101 unsigned int nr_irqs, void *arg);
102 void (*free)(struct irq_domain *d, unsigned int virq,
103 unsigned int nr_irqs);
104 int (*activate)(struct irq_domain *d, struct irq_data *irqd, bool reserve);
105 void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data);
106 int (*translate)(struct irq_domain *d, struct irq_fwspec *fwspec,
107 unsigned long *out_hwirq, unsigned int *out_type);
108#endif
109#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
110 void (*debug_show)(struct seq_file *m, struct irq_domain *d,
111 struct irq_data *irqd, int ind);
112#endif
113};
114
115extern const struct irq_domain_ops irq_generic_chip_ops;
116
117struct irq_domain_chip_generic;
118
119/**
120 * struct irq_domain - Hardware interrupt number translation object
121 * @link: Element in global irq_domain list.
122 * @name: Name of interrupt domain
123 * @ops: Pointer to irq_domain methods
124 * @host_data: Private data pointer for use by owner. Not touched by irq_domain
125 * core code.
126 * @flags: Per irq_domain flags
127 * @mapcount: The number of mapped interrupts
128 * @mutex: Domain lock, hierarchical domains use root domain's lock
129 * @root: Pointer to root domain, or containing structure if non-hierarchical
130 *
131 * Optional elements:
132 * @fwnode: Pointer to firmware node associated with the irq_domain. Pretty easy
133 * to swap it for the of_node via the irq_domain_get_of_node accessor
134 * @gc: Pointer to a list of generic chips. There is a helper function for
135 * setting up one or more generic chips for interrupt controllers
136 * drivers using the generic chip library which uses this pointer.
137 * @dev: Pointer to the device which instantiated the irqdomain
138 * With per device irq domains this is not necessarily the same
139 * as @pm_dev.
140 * @pm_dev: Pointer to a device that can be utilized for power management
141 * purposes related to the irq domain.
142 * @parent: Pointer to parent irq_domain to support hierarchy irq_domains
143 * @msi_parent_ops: Pointer to MSI parent domain methods for per device domain init
144 *
145 * Revmap data, used internally by the irq domain code:
146 * @revmap_size: Size of the linear map table @revmap[]
147 * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map
148 * @revmap: Linear table of irq_data pointers
149 */
150struct irq_domain {
151 struct list_head link;
152 const char *name;
153 const struct irq_domain_ops *ops;
154 void *host_data;
155 unsigned int flags;
156 unsigned int mapcount;
157 struct mutex mutex;
158 struct irq_domain *root;
159
160 /* Optional data */
161 struct fwnode_handle *fwnode;
162 enum irq_domain_bus_token bus_token;
163 struct irq_domain_chip_generic *gc;
164 struct device *dev;
165 struct device *pm_dev;
166#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
167 struct irq_domain *parent;
168#endif
169#ifdef CONFIG_GENERIC_MSI_IRQ
170 const struct msi_parent_ops *msi_parent_ops;
171#endif
172
173 /* reverse map data. The linear map gets appended to the irq_domain */
174 irq_hw_number_t hwirq_max;
175 unsigned int revmap_size;
176 struct radix_tree_root revmap_tree;
177 struct irq_data __rcu *revmap[] __counted_by(revmap_size);
178};
179
180/* Irq domain flags */
181enum {
182 /* Irq domain is hierarchical */
183 IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0),
184
185 /* Irq domain name was allocated in __irq_domain_add() */
186 IRQ_DOMAIN_NAME_ALLOCATED = (1 << 1),
187
188 /* Irq domain is an IPI domain with virq per cpu */
189 IRQ_DOMAIN_FLAG_IPI_PER_CPU = (1 << 2),
190
191 /* Irq domain is an IPI domain with single virq */
192 IRQ_DOMAIN_FLAG_IPI_SINGLE = (1 << 3),
193
194 /* Irq domain implements MSIs */
195 IRQ_DOMAIN_FLAG_MSI = (1 << 4),
196
197 /*
198 * Irq domain implements isolated MSI, see msi_device_has_isolated_msi()
199 */
200 IRQ_DOMAIN_FLAG_ISOLATED_MSI = (1 << 5),
201
202 /* Irq domain doesn't translate anything */
203 IRQ_DOMAIN_FLAG_NO_MAP = (1 << 6),
204
205 /* Irq domain is a MSI parent domain */
206 IRQ_DOMAIN_FLAG_MSI_PARENT = (1 << 8),
207
208 /* Irq domain is a MSI device domain */
209 IRQ_DOMAIN_FLAG_MSI_DEVICE = (1 << 9),
210
211 /*
212 * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved
213 * for implementation specific purposes and ignored by the
214 * core code.
215 */
216 IRQ_DOMAIN_FLAG_NONCORE = (1 << 16),
217};
218
219static inline struct device_node *irq_domain_get_of_node(struct irq_domain *d)
220{
221 return to_of_node(d->fwnode);
222}
223
224static inline void irq_domain_set_pm_device(struct irq_domain *d,
225 struct device *dev)
226{
227 if (d)
228 d->pm_dev = dev;
229}
230
231#ifdef CONFIG_IRQ_DOMAIN
232struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
233 const char *name, phys_addr_t *pa);
234
235enum {
236 IRQCHIP_FWNODE_REAL,
237 IRQCHIP_FWNODE_NAMED,
238 IRQCHIP_FWNODE_NAMED_ID,
239};
240
241static inline
242struct fwnode_handle *irq_domain_alloc_named_fwnode(const char *name)
243{
244 return __irq_domain_alloc_fwnode(type: IRQCHIP_FWNODE_NAMED, id: 0, name, NULL);
245}
246
247static inline
248struct fwnode_handle *irq_domain_alloc_named_id_fwnode(const char *name, int id)
249{
250 return __irq_domain_alloc_fwnode(type: IRQCHIP_FWNODE_NAMED_ID, id, name,
251 NULL);
252}
253
254static inline struct fwnode_handle *irq_domain_alloc_fwnode(phys_addr_t *pa)
255{
256 return __irq_domain_alloc_fwnode(type: IRQCHIP_FWNODE_REAL, id: 0, NULL, pa);
257}
258
259void irq_domain_free_fwnode(struct fwnode_handle *fwnode);
260struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, unsigned int size,
261 irq_hw_number_t hwirq_max, int direct_max,
262 const struct irq_domain_ops *ops,
263 void *host_data);
264struct irq_domain *irq_domain_create_simple(struct fwnode_handle *fwnode,
265 unsigned int size,
266 unsigned int first_irq,
267 const struct irq_domain_ops *ops,
268 void *host_data);
269struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
270 unsigned int size,
271 unsigned int first_irq,
272 irq_hw_number_t first_hwirq,
273 const struct irq_domain_ops *ops,
274 void *host_data);
275struct irq_domain *irq_domain_create_legacy(struct fwnode_handle *fwnode,
276 unsigned int size,
277 unsigned int first_irq,
278 irq_hw_number_t first_hwirq,
279 const struct irq_domain_ops *ops,
280 void *host_data);
281extern struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
282 enum irq_domain_bus_token bus_token);
283extern void irq_set_default_host(struct irq_domain *host);
284extern struct irq_domain *irq_get_default_host(void);
285extern int irq_domain_alloc_descs(int virq, unsigned int nr_irqs,
286 irq_hw_number_t hwirq, int node,
287 const struct irq_affinity_desc *affinity);
288
289static inline struct fwnode_handle *of_node_to_fwnode(struct device_node *node)
290{
291 return node ? &node->fwnode : NULL;
292}
293
294extern const struct fwnode_operations irqchip_fwnode_ops;
295
296static inline bool is_fwnode_irqchip(struct fwnode_handle *fwnode)
297{
298 return fwnode && fwnode->ops == &irqchip_fwnode_ops;
299}
300
301extern void irq_domain_update_bus_token(struct irq_domain *domain,
302 enum irq_domain_bus_token bus_token);
303
304static inline
305struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode,
306 enum irq_domain_bus_token bus_token)
307{
308 struct irq_fwspec fwspec = {
309 .fwnode = fwnode,
310 };
311
312 return irq_find_matching_fwspec(fwspec: &fwspec, bus_token);
313}
314
315static inline struct irq_domain *irq_find_matching_host(struct device_node *node,
316 enum irq_domain_bus_token bus_token)
317{
318 return irq_find_matching_fwnode(fwnode: of_node_to_fwnode(node), bus_token);
319}
320
321static inline struct irq_domain *irq_find_host(struct device_node *node)
322{
323 struct irq_domain *d;
324
325 d = irq_find_matching_host(node, bus_token: DOMAIN_BUS_WIRED);
326 if (!d)
327 d = irq_find_matching_host(node, bus_token: DOMAIN_BUS_ANY);
328
329 return d;
330}
331
332static inline struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
333 unsigned int size,
334 unsigned int first_irq,
335 const struct irq_domain_ops *ops,
336 void *host_data)
337{
338 return irq_domain_create_simple(fwnode: of_node_to_fwnode(node: of_node), size, first_irq, ops, host_data);
339}
340
341/**
342 * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain.
343 * @of_node: pointer to interrupt controller's device tree node.
344 * @size: Number of interrupts in the domain.
345 * @ops: map/unmap domain callbacks
346 * @host_data: Controller private data pointer
347 */
348static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_node,
349 unsigned int size,
350 const struct irq_domain_ops *ops,
351 void *host_data)
352{
353 return __irq_domain_add(fwnode: of_node_to_fwnode(node: of_node), size, hwirq_max: size, direct_max: 0, ops, host_data);
354}
355
356#ifdef CONFIG_IRQ_DOMAIN_NOMAP
357static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_node,
358 unsigned int max_irq,
359 const struct irq_domain_ops *ops,
360 void *host_data)
361{
362 return __irq_domain_add(of_node_to_fwnode(of_node), 0, max_irq, max_irq, ops, host_data);
363}
364
365extern unsigned int irq_create_direct_mapping(struct irq_domain *host);
366#endif
367
368static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node,
369 const struct irq_domain_ops *ops,
370 void *host_data)
371{
372 return __irq_domain_add(fwnode: of_node_to_fwnode(node: of_node), size: 0, hwirq_max: ~0, direct_max: 0, ops, host_data);
373}
374
375static inline struct irq_domain *irq_domain_create_linear(struct fwnode_handle *fwnode,
376 unsigned int size,
377 const struct irq_domain_ops *ops,
378 void *host_data)
379{
380 return __irq_domain_add(fwnode, size, hwirq_max: size, direct_max: 0, ops, host_data);
381}
382
383static inline struct irq_domain *irq_domain_create_tree(struct fwnode_handle *fwnode,
384 const struct irq_domain_ops *ops,
385 void *host_data)
386{
387 return __irq_domain_add(fwnode, size: 0, hwirq_max: ~0, direct_max: 0, ops, host_data);
388}
389
390extern void irq_domain_remove(struct irq_domain *host);
391
392extern int irq_domain_associate(struct irq_domain *domain, unsigned int irq,
393 irq_hw_number_t hwirq);
394extern void irq_domain_associate_many(struct irq_domain *domain,
395 unsigned int irq_base,
396 irq_hw_number_t hwirq_base, int count);
397
398extern unsigned int irq_create_mapping_affinity(struct irq_domain *host,
399 irq_hw_number_t hwirq,
400 const struct irq_affinity_desc *affinity);
401extern unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec);
402extern void irq_dispose_mapping(unsigned int virq);
403
404static inline unsigned int irq_create_mapping(struct irq_domain *host,
405 irq_hw_number_t hwirq)
406{
407 return irq_create_mapping_affinity(host, hwirq, NULL);
408}
409
410extern struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain,
411 irq_hw_number_t hwirq,
412 unsigned int *irq);
413
414static inline struct irq_desc *irq_resolve_mapping(struct irq_domain *domain,
415 irq_hw_number_t hwirq)
416{
417 return __irq_resolve_mapping(domain, hwirq, NULL);
418}
419
420/**
421 * irq_find_mapping() - Find a linux irq from a hw irq number.
422 * @domain: domain owning this hardware interrupt
423 * @hwirq: hardware irq number in that domain space
424 */
425static inline unsigned int irq_find_mapping(struct irq_domain *domain,
426 irq_hw_number_t hwirq)
427{
428 unsigned int irq;
429
430 if (__irq_resolve_mapping(domain, hwirq, irq: &irq))
431 return irq;
432
433 return 0;
434}
435
436static inline unsigned int irq_linear_revmap(struct irq_domain *domain,
437 irq_hw_number_t hwirq)
438{
439 return irq_find_mapping(domain, hwirq);
440}
441
442extern const struct irq_domain_ops irq_domain_simple_ops;
443
444/* stock xlate functions */
445int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
446 const u32 *intspec, unsigned int intsize,
447 irq_hw_number_t *out_hwirq, unsigned int *out_type);
448int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr,
449 const u32 *intspec, unsigned int intsize,
450 irq_hw_number_t *out_hwirq, unsigned int *out_type);
451int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr,
452 const u32 *intspec, unsigned int intsize,
453 irq_hw_number_t *out_hwirq, unsigned int *out_type);
454
455int irq_domain_translate_twocell(struct irq_domain *d,
456 struct irq_fwspec *fwspec,
457 unsigned long *out_hwirq,
458 unsigned int *out_type);
459
460int irq_domain_translate_onecell(struct irq_domain *d,
461 struct irq_fwspec *fwspec,
462 unsigned long *out_hwirq,
463 unsigned int *out_type);
464
465/* IPI functions */
466int irq_reserve_ipi(struct irq_domain *domain, const struct cpumask *dest);
467int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest);
468
469/* V2 interfaces to support hierarchy IRQ domains. */
470extern struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
471 unsigned int virq);
472extern void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
473 irq_hw_number_t hwirq,
474 const struct irq_chip *chip,
475 void *chip_data, irq_flow_handler_t handler,
476 void *handler_data, const char *handler_name);
477extern void irq_domain_reset_irq_data(struct irq_data *irq_data);
478#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
479extern struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
480 unsigned int flags, unsigned int size,
481 struct fwnode_handle *fwnode,
482 const struct irq_domain_ops *ops, void *host_data);
483
484static inline struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *parent,
485 unsigned int flags,
486 unsigned int size,
487 struct device_node *node,
488 const struct irq_domain_ops *ops,
489 void *host_data)
490{
491 return irq_domain_create_hierarchy(parent, flags, size,
492 fwnode: of_node_to_fwnode(node),
493 ops, host_data);
494}
495
496extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
497 unsigned int nr_irqs, int node, void *arg,
498 bool realloc,
499 const struct irq_affinity_desc *affinity);
500extern void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs);
501extern int irq_domain_activate_irq(struct irq_data *irq_data, bool early);
502extern void irq_domain_deactivate_irq(struct irq_data *irq_data);
503
504static inline int irq_domain_alloc_irqs(struct irq_domain *domain,
505 unsigned int nr_irqs, int node, void *arg)
506{
507 return __irq_domain_alloc_irqs(domain, irq_base: -1, nr_irqs, node, arg, realloc: false,
508 NULL);
509}
510
511extern int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,
512 unsigned int irq_base,
513 unsigned int nr_irqs, void *arg);
514extern int irq_domain_set_hwirq_and_chip(struct irq_domain *domain,
515 unsigned int virq,
516 irq_hw_number_t hwirq,
517 const struct irq_chip *chip,
518 void *chip_data);
519extern void irq_domain_free_irqs_common(struct irq_domain *domain,
520 unsigned int virq,
521 unsigned int nr_irqs);
522extern void irq_domain_free_irqs_top(struct irq_domain *domain,
523 unsigned int virq, unsigned int nr_irqs);
524
525extern int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg);
526extern int irq_domain_pop_irq(struct irq_domain *domain, int virq);
527
528extern int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
529 unsigned int irq_base,
530 unsigned int nr_irqs, void *arg);
531
532extern void irq_domain_free_irqs_parent(struct irq_domain *domain,
533 unsigned int irq_base,
534 unsigned int nr_irqs);
535
536extern int irq_domain_disconnect_hierarchy(struct irq_domain *domain,
537 unsigned int virq);
538
539static inline bool irq_domain_is_hierarchy(struct irq_domain *domain)
540{
541 return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY;
542}
543
544static inline bool irq_domain_is_ipi(struct irq_domain *domain)
545{
546 return domain->flags &
547 (IRQ_DOMAIN_FLAG_IPI_PER_CPU | IRQ_DOMAIN_FLAG_IPI_SINGLE);
548}
549
550static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain)
551{
552 return domain->flags & IRQ_DOMAIN_FLAG_IPI_PER_CPU;
553}
554
555static inline bool irq_domain_is_ipi_single(struct irq_domain *domain)
556{
557 return domain->flags & IRQ_DOMAIN_FLAG_IPI_SINGLE;
558}
559
560static inline bool irq_domain_is_msi(struct irq_domain *domain)
561{
562 return domain->flags & IRQ_DOMAIN_FLAG_MSI;
563}
564
565static inline bool irq_domain_is_msi_parent(struct irq_domain *domain)
566{
567 return domain->flags & IRQ_DOMAIN_FLAG_MSI_PARENT;
568}
569
570static inline bool irq_domain_is_msi_device(struct irq_domain *domain)
571{
572 return domain->flags & IRQ_DOMAIN_FLAG_MSI_DEVICE;
573}
574
575#else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
576static inline int irq_domain_alloc_irqs(struct irq_domain *domain,
577 unsigned int nr_irqs, int node, void *arg)
578{
579 return -1;
580}
581
582static inline void irq_domain_free_irqs(unsigned int virq,
583 unsigned int nr_irqs) { }
584
585static inline bool irq_domain_is_hierarchy(struct irq_domain *domain)
586{
587 return false;
588}
589
590static inline bool irq_domain_is_ipi(struct irq_domain *domain)
591{
592 return false;
593}
594
595static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain)
596{
597 return false;
598}
599
600static inline bool irq_domain_is_ipi_single(struct irq_domain *domain)
601{
602 return false;
603}
604
605static inline bool irq_domain_is_msi(struct irq_domain *domain)
606{
607 return false;
608}
609
610static inline bool irq_domain_is_msi_parent(struct irq_domain *domain)
611{
612 return false;
613}
614
615static inline bool irq_domain_is_msi_device(struct irq_domain *domain)
616{
617 return false;
618}
619
620#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
621
622#else /* CONFIG_IRQ_DOMAIN */
623static inline void irq_dispose_mapping(unsigned int virq) { }
624static inline struct irq_domain *irq_find_matching_fwnode(
625 struct fwnode_handle *fwnode, enum irq_domain_bus_token bus_token)
626{
627 return NULL;
628}
629#endif /* !CONFIG_IRQ_DOMAIN */
630
631#endif /* _LINUX_IRQDOMAIN_H */
632

source code of linux/include/linux/irqdomain.h