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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 *
129 * Optional elements:
130 * @fwnode: Pointer to firmware node associated with the irq_domain. Pretty easy
131 * to swap it for the of_node via the irq_domain_get_of_node accessor
132 * @gc: Pointer to a list of generic chips. There is a helper function for
133 * setting up one or more generic chips for interrupt controllers
134 * drivers using the generic chip library which uses this pointer.
135 * @dev: Pointer to the device which instantiated the irqdomain
136 * With per device irq domains this is not necessarily the same
137 * as @pm_dev.
138 * @pm_dev: Pointer to a device that can be utilized for power management
139 * purposes related to the irq domain.
140 * @parent: Pointer to parent irq_domain to support hierarchy irq_domains
141 * @msi_parent_ops: Pointer to MSI parent domain methods for per device domain init
142 *
143 * Revmap data, used internally by the irq domain code:
144 * @revmap_size: Size of the linear map table @revmap[]
145 * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map
146 * @revmap_mutex: Lock for the revmap
147 * @revmap: Linear table of irq_data pointers
148 */
149struct irq_domain {
150 struct list_head link;
151 const char *name;
152 const struct irq_domain_ops *ops;
153 void *host_data;
154 unsigned int flags;
155 unsigned int mapcount;
156
157 /* Optional data */
158 struct fwnode_handle *fwnode;
159 enum irq_domain_bus_token bus_token;
160 struct irq_domain_chip_generic *gc;
161 struct device *dev;
162 struct device *pm_dev;
163#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
164 struct irq_domain *parent;
165#endif
166#ifdef CONFIG_GENERIC_MSI_IRQ
167 const struct msi_parent_ops *msi_parent_ops;
168#endif
169
170 /* reverse map data. The linear map gets appended to the irq_domain */
171 irq_hw_number_t hwirq_max;
172 unsigned int revmap_size;
173 struct radix_tree_root revmap_tree;
174 struct mutex revmap_mutex;
175 struct irq_data __rcu *revmap[];
176};
177
178/* Irq domain flags */
179enum {
180 /* Irq domain is hierarchical */
181 IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0),
182
183 /* Irq domain name was allocated in __irq_domain_add() */
184 IRQ_DOMAIN_NAME_ALLOCATED = (1 << 1),
185
186 /* Irq domain is an IPI domain with virq per cpu */
187 IRQ_DOMAIN_FLAG_IPI_PER_CPU = (1 << 2),
188
189 /* Irq domain is an IPI domain with single virq */
190 IRQ_DOMAIN_FLAG_IPI_SINGLE = (1 << 3),
191
192 /* Irq domain implements MSIs */
193 IRQ_DOMAIN_FLAG_MSI = (1 << 4),
194
195 /* Irq domain implements MSI remapping */
196 IRQ_DOMAIN_FLAG_MSI_REMAP = (1 << 5),
197
198 /* Irq domain doesn't translate anything */
199 IRQ_DOMAIN_FLAG_NO_MAP = (1 << 6),
200
201 /* Irq domain is a MSI parent domain */
202 IRQ_DOMAIN_FLAG_MSI_PARENT = (1 << 8),
203
204 /* Irq domain is a MSI device domain */
205 IRQ_DOMAIN_FLAG_MSI_DEVICE = (1 << 9),
206
207 /*
208 * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved
209 * for implementation specific purposes and ignored by the
210 * core code.
211 */
212 IRQ_DOMAIN_FLAG_NONCORE = (1 << 16),
213};
214
215static inline struct device_node *irq_domain_get_of_node(struct irq_domain *d)
216{
217 return to_of_node(d->fwnode);
218}
219
220static inline void irq_domain_set_pm_device(struct irq_domain *d,
221 struct device *dev)
222{
223 if (d)
224 d->pm_dev = dev;
225}
226
227#ifdef CONFIG_IRQ_DOMAIN
228struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
229 const char *name, phys_addr_t *pa);
230
231enum {
232 IRQCHIP_FWNODE_REAL,
233 IRQCHIP_FWNODE_NAMED,
234 IRQCHIP_FWNODE_NAMED_ID,
235};
236
237static inline
238struct fwnode_handle *irq_domain_alloc_named_fwnode(const char *name)
239{
240 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED, 0, name, NULL);
241}
242
243static inline
244struct fwnode_handle *irq_domain_alloc_named_id_fwnode(const char *name, int id)
245{
246 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED_ID, id, name,
247 NULL);
248}
249
250static inline struct fwnode_handle *irq_domain_alloc_fwnode(phys_addr_t *pa)
251{
252 return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_REAL, 0, NULL, pa);
253}
254
255void irq_domain_free_fwnode(struct fwnode_handle *fwnode);
256struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, unsigned int size,
257 irq_hw_number_t hwirq_max, int direct_max,
258 const struct irq_domain_ops *ops,
259 void *host_data);
260struct irq_domain *irq_domain_create_simple(struct fwnode_handle *fwnode,
261 unsigned int size,
262 unsigned int first_irq,
263 const struct irq_domain_ops *ops,
264 void *host_data);
265struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
266 unsigned int size,
267 unsigned int first_irq,
268 irq_hw_number_t first_hwirq,
269 const struct irq_domain_ops *ops,
270 void *host_data);
271struct irq_domain *irq_domain_create_legacy(struct fwnode_handle *fwnode,
272 unsigned int size,
273 unsigned int first_irq,
274 irq_hw_number_t first_hwirq,
275 const struct irq_domain_ops *ops,
276 void *host_data);
277extern struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
278 enum irq_domain_bus_token bus_token);
279extern bool irq_domain_check_msi_remap(void);
280extern void irq_set_default_host(struct irq_domain *host);
281extern struct irq_domain *irq_get_default_host(void);
282extern int irq_domain_alloc_descs(int virq, unsigned int nr_irqs,
283 irq_hw_number_t hwirq, int node,
284 const struct irq_affinity_desc *affinity);
285
286static inline struct fwnode_handle *of_node_to_fwnode(struct device_node *node)
287{
288 return node ? &node->fwnode : NULL;
289}
290
291extern const struct fwnode_operations irqchip_fwnode_ops;
292
293static inline bool is_fwnode_irqchip(struct fwnode_handle *fwnode)
294{
295 return fwnode && fwnode->ops == &irqchip_fwnode_ops;
296}
297
298extern void irq_domain_update_bus_token(struct irq_domain *domain,
299 enum irq_domain_bus_token bus_token);
300
301static inline
302struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode,
303 enum irq_domain_bus_token bus_token)
304{
305 struct irq_fwspec fwspec = {
306 .fwnode = fwnode,
307 };
308
309 return irq_find_matching_fwspec(&fwspec, bus_token);
310}
311
312static inline struct irq_domain *irq_find_matching_host(struct device_node *node,
313 enum irq_domain_bus_token bus_token)
314{
315 return irq_find_matching_fwnode(of_node_to_fwnode(node), bus_token);
316}
317
318static inline struct irq_domain *irq_find_host(struct device_node *node)
319{
320 struct irq_domain *d;
321
322 d = irq_find_matching_host(node, DOMAIN_BUS_WIRED);
323 if (!d)
324 d = irq_find_matching_host(node, DOMAIN_BUS_ANY);
325
326 return d;
327}
328
329static inline struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
330 unsigned int size,
331 unsigned int first_irq,
332 const struct irq_domain_ops *ops,
333 void *host_data)
334{
335 return irq_domain_create_simple(of_node_to_fwnode(of_node), size, first_irq, ops, host_data);
336}
337
338/**
339 * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain.
340 * @of_node: pointer to interrupt controller's device tree node.
341 * @size: Number of interrupts in the domain.
342 * @ops: map/unmap domain callbacks
343 * @host_data: Controller private data pointer
344 */
345static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_node,
346 unsigned int size,
347 const struct irq_domain_ops *ops,
348 void *host_data)
349{
350 return __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data);
351}
352
353#ifdef CONFIG_IRQ_DOMAIN_NOMAP
354static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_node,
355 unsigned int max_irq,
356 const struct irq_domain_ops *ops,
357 void *host_data)
358{
359 return __irq_domain_add(of_node_to_fwnode(of_node), 0, max_irq, max_irq, ops, host_data);
360}
361
362extern unsigned int irq_create_direct_mapping(struct irq_domain *host);
363#endif
364
365static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node,
366 const struct irq_domain_ops *ops,
367 void *host_data)
368{
369 return __irq_domain_add(of_node_to_fwnode(of_node), 0, ~0, 0, ops, host_data);
370}
371
372static inline struct irq_domain *irq_domain_create_linear(struct fwnode_handle *fwnode,
373 unsigned int size,
374 const struct irq_domain_ops *ops,
375 void *host_data)
376{
377 return __irq_domain_add(fwnode, size, size, 0, ops, host_data);
378}
379
380static inline struct irq_domain *irq_domain_create_tree(struct fwnode_handle *fwnode,
381 const struct irq_domain_ops *ops,
382 void *host_data)
383{
384 return __irq_domain_add(fwnode, 0, ~0, 0, ops, host_data);
385}
386
387extern void irq_domain_remove(struct irq_domain *host);
388
389extern int irq_domain_associate(struct irq_domain *domain, unsigned int irq,
390 irq_hw_number_t hwirq);
391extern void irq_domain_associate_many(struct irq_domain *domain,
392 unsigned int irq_base,
393 irq_hw_number_t hwirq_base, int count);
394
395extern unsigned int irq_create_mapping_affinity(struct irq_domain *host,
396 irq_hw_number_t hwirq,
397 const struct irq_affinity_desc *affinity);
398extern unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec);
399extern void irq_dispose_mapping(unsigned int virq);
400
401static inline unsigned int irq_create_mapping(struct irq_domain *host,
402 irq_hw_number_t hwirq)
403{
404 return irq_create_mapping_affinity(host, hwirq, NULL);
405}
406
407extern struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain,
408 irq_hw_number_t hwirq,
409 unsigned int *irq);
410
411static inline struct irq_desc *irq_resolve_mapping(struct irq_domain *domain,
412 irq_hw_number_t hwirq)
413{
414 return __irq_resolve_mapping(domain, hwirq, NULL);
415}
416
417/**
418 * irq_find_mapping() - Find a linux irq from a hw irq number.
419 * @domain: domain owning this hardware interrupt
420 * @hwirq: hardware irq number in that domain space
421 */
422static inline unsigned int irq_find_mapping(struct irq_domain *domain,
423 irq_hw_number_t hwirq)
424{
425 unsigned int irq;
426
427 if (__irq_resolve_mapping(domain, hwirq, &irq))
428 return irq;
429
430 return 0;
431}
432
433static inline unsigned int irq_linear_revmap(struct irq_domain *domain,
434 irq_hw_number_t hwirq)
435{
436 return irq_find_mapping(domain, hwirq);
437}
438
439extern const struct irq_domain_ops irq_domain_simple_ops;
440
441/* stock xlate functions */
442int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,
443 const u32 *intspec, unsigned int intsize,
444 irq_hw_number_t *out_hwirq, unsigned int *out_type);
445int irq_domain_xlate_twocell(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_onetwocell(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);
451
452int irq_domain_translate_twocell(struct irq_domain *d,
453 struct irq_fwspec *fwspec,
454 unsigned long *out_hwirq,
455 unsigned int *out_type);
456
457int irq_domain_translate_onecell(struct irq_domain *d,
458 struct irq_fwspec *fwspec,
459 unsigned long *out_hwirq,
460 unsigned int *out_type);
461
462/* IPI functions */
463int irq_reserve_ipi(struct irq_domain *domain, const struct cpumask *dest);
464int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest);
465
466/* V2 interfaces to support hierarchy IRQ domains. */
467extern struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,
468 unsigned int virq);
469extern void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
470 irq_hw_number_t hwirq,
471 const struct irq_chip *chip,
472 void *chip_data, irq_flow_handler_t handler,
473 void *handler_data, const char *handler_name);
474extern void irq_domain_reset_irq_data(struct irq_data *irq_data);
475#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
476extern struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent,
477 unsigned int flags, unsigned int size,
478 struct fwnode_handle *fwnode,
479 const struct irq_domain_ops *ops, void *host_data);
480
481static inline struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *parent,
482 unsigned int flags,
483 unsigned int size,
484 struct device_node *node,
485 const struct irq_domain_ops *ops,
486 void *host_data)
487{
488 return irq_domain_create_hierarchy(parent, flags, size,
489 of_node_to_fwnode(node),
490 ops, host_data);
491}
492
493extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
494 unsigned int nr_irqs, int node, void *arg,
495 bool realloc,
496 const struct irq_affinity_desc *affinity);
497extern void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs);
498extern int irq_domain_activate_irq(struct irq_data *irq_data, bool early);
499extern void irq_domain_deactivate_irq(struct irq_data *irq_data);
500
501static inline int irq_domain_alloc_irqs(struct irq_domain *domain,
502 unsigned int nr_irqs, int node, void *arg)
503{
504 return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false,
505 NULL);
506}
507
508extern int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain,
509 unsigned int irq_base,
510 unsigned int nr_irqs, void *arg);
511extern int irq_domain_set_hwirq_and_chip(struct irq_domain *domain,
512 unsigned int virq,
513 irq_hw_number_t hwirq,
514 const struct irq_chip *chip,
515 void *chip_data);
516extern void irq_domain_free_irqs_common(struct irq_domain *domain,
517 unsigned int virq,
518 unsigned int nr_irqs);
519extern void irq_domain_free_irqs_top(struct irq_domain *domain,
520 unsigned int virq, unsigned int nr_irqs);
521
522extern int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg);
523extern int irq_domain_pop_irq(struct irq_domain *domain, int virq);
524
525extern int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
526 unsigned int irq_base,
527 unsigned int nr_irqs, void *arg);
528
529extern void irq_domain_free_irqs_parent(struct irq_domain *domain,
530 unsigned int irq_base,
531 unsigned int nr_irqs);
532
533extern int irq_domain_disconnect_hierarchy(struct irq_domain *domain,
534 unsigned int virq);
535
536static inline bool irq_domain_is_hierarchy(struct irq_domain *domain)
537{
538 return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY;
539}
540
541static inline bool irq_domain_is_ipi(struct irq_domain *domain)
542{
543 return domain->flags &
544 (IRQ_DOMAIN_FLAG_IPI_PER_CPU | IRQ_DOMAIN_FLAG_IPI_SINGLE);
545}
546
547static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain)
548{
549 return domain->flags & IRQ_DOMAIN_FLAG_IPI_PER_CPU;
550}
551
552static inline bool irq_domain_is_ipi_single(struct irq_domain *domain)
553{
554 return domain->flags & IRQ_DOMAIN_FLAG_IPI_SINGLE;
555}
556
557static inline bool irq_domain_is_msi(struct irq_domain *domain)
558{
559 return domain->flags & IRQ_DOMAIN_FLAG_MSI;
560}
561
562static inline bool irq_domain_is_msi_remap(struct irq_domain *domain)
563{
564 return domain->flags & IRQ_DOMAIN_FLAG_MSI_REMAP;
565}
566
567extern bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain);
568
569static inline bool irq_domain_is_msi_parent(struct irq_domain *domain)
570{
571 return domain->flags & IRQ_DOMAIN_FLAG_MSI_PARENT;
572}
573
574static inline bool irq_domain_is_msi_device(struct irq_domain *domain)
575{
576 return domain->flags & IRQ_DOMAIN_FLAG_MSI_DEVICE;
577}
578
579#else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
580static inline int irq_domain_alloc_irqs(struct irq_domain *domain,
581 unsigned int nr_irqs, int node, void *arg)
582{
583 return -1;
584}
585
586static inline void irq_domain_free_irqs(unsigned int virq,
587 unsigned int nr_irqs) { }
588
589static inline bool irq_domain_is_hierarchy(struct irq_domain *domain)
590{
591 return false;
592}
593
594static inline bool irq_domain_is_ipi(struct irq_domain *domain)
595{
596 return false;
597}
598
599static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain)
600{
601 return false;
602}
603
604static inline bool irq_domain_is_ipi_single(struct irq_domain *domain)
605{
606 return false;
607}
608
609static inline bool irq_domain_is_msi(struct irq_domain *domain)
610{
611 return false;
612}
613
614static inline bool irq_domain_is_msi_remap(struct irq_domain *domain)
615{
616 return false;
617}
618
619static inline bool
620irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain)
621{
622 return false;
623}
624
625static inline bool irq_domain_is_msi_parent(struct irq_domain *domain)
626{
627 return false;
628}
629
630static inline bool irq_domain_is_msi_device(struct irq_domain *domain)
631{
632 return false;
633}
634
635#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
636
637#else /* CONFIG_IRQ_DOMAIN */
638static inline void irq_dispose_mapping(unsigned int virq) { }
639static inline struct irq_domain *irq_find_matching_fwnode(
640 struct fwnode_handle *fwnode, enum irq_domain_bus_token bus_token)
641{
642 return NULL;
643}
644static inline bool irq_domain_check_msi_remap(void)
645{
646 return false;
647}
648#endif /* !CONFIG_IRQ_DOMAIN */
649
650#endif /* _LINUX_IRQDOMAIN_H */