Commit | Line | Data |
---|---|---|
52a65ff5 TG |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | ||
54a90588 PM |
3 | #define pr_fmt(fmt) "irq: " fmt |
4 | ||
c5c601c4 | 5 | #include <linux/acpi.h> |
cc79ca69 GL |
6 | #include <linux/debugfs.h> |
7 | #include <linux/hardirq.h> | |
8 | #include <linux/interrupt.h> | |
08a543ad | 9 | #include <linux/irq.h> |
cc79ca69 | 10 | #include <linux/irqdesc.h> |
08a543ad GL |
11 | #include <linux/irqdomain.h> |
12 | #include <linux/module.h> | |
13 | #include <linux/mutex.h> | |
14 | #include <linux/of.h> | |
7e713301 | 15 | #include <linux/of_address.h> |
64be38ab | 16 | #include <linux/of_irq.h> |
5ca4db61 | 17 | #include <linux/topology.h> |
cc79ca69 | 18 | #include <linux/seq_file.h> |
7e713301 | 19 | #include <linux/slab.h> |
cc79ca69 GL |
20 | #include <linux/smp.h> |
21 | #include <linux/fs.h> | |
08a543ad GL |
22 | |
23 | static LIST_HEAD(irq_domain_list); | |
24 | static DEFINE_MUTEX(irq_domain_mutex); | |
25 | ||
68700650 | 26 | static struct irq_domain *irq_default_domain; |
cc79ca69 | 27 | |
f8264e34 JL |
28 | static void irq_domain_check_hierarchy(struct irq_domain *domain); |
29 | ||
b145dcc4 | 30 | struct irqchip_fwid { |
d59f6617 TG |
31 | struct fwnode_handle fwnode; |
32 | unsigned int type; | |
33 | char *name; | |
b977fcf4 | 34 | phys_addr_t *pa; |
b145dcc4 MZ |
35 | }; |
36 | ||
087cdfb6 TG |
37 | #ifdef CONFIG_GENERIC_IRQ_DEBUGFS |
38 | static void debugfs_add_domain_dir(struct irq_domain *d); | |
39 | static void debugfs_remove_domain_dir(struct irq_domain *d); | |
40 | #else | |
41 | static inline void debugfs_add_domain_dir(struct irq_domain *d) { } | |
42 | static inline void debugfs_remove_domain_dir(struct irq_domain *d) { } | |
43 | #endif | |
44 | ||
db3e50f3 | 45 | const struct fwnode_operations irqchip_fwnode_ops; |
b6eb66fd | 46 | EXPORT_SYMBOL_GPL(irqchip_fwnode_ops); |
db3e50f3 | 47 | |
b145dcc4 MZ |
48 | /** |
49 | * irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for | |
50 | * identifying an irq domain | |
d59f6617 TG |
51 | * @type: Type of irqchip_fwnode. See linux/irqdomain.h |
52 | * @name: Optional user provided domain name | |
53 | * @id: Optional user provided id if name != NULL | |
54 | * @data: Optional user-provided data | |
b145dcc4 | 55 | * |
d59f6617 | 56 | * Allocate a struct irqchip_fwid, and return a poiner to the embedded |
b145dcc4 | 57 | * fwnode_handle (or NULL on failure). |
d59f6617 TG |
58 | * |
59 | * Note: The types IRQCHIP_FWNODE_NAMED and IRQCHIP_FWNODE_NAMED_ID are | |
60 | * solely to transport name information to irqdomain creation code. The | |
61 | * node is not stored. For other types the pointer is kept in the irq | |
62 | * domain struct. | |
b145dcc4 | 63 | */ |
d59f6617 | 64 | struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id, |
b977fcf4 MZ |
65 | const char *name, |
66 | phys_addr_t *pa) | |
b145dcc4 MZ |
67 | { |
68 | struct irqchip_fwid *fwid; | |
d59f6617 | 69 | char *n; |
b145dcc4 MZ |
70 | |
71 | fwid = kzalloc(sizeof(*fwid), GFP_KERNEL); | |
b145dcc4 | 72 | |
d59f6617 TG |
73 | switch (type) { |
74 | case IRQCHIP_FWNODE_NAMED: | |
75 | n = kasprintf(GFP_KERNEL, "%s", name); | |
76 | break; | |
77 | case IRQCHIP_FWNODE_NAMED_ID: | |
78 | n = kasprintf(GFP_KERNEL, "%s-%d", name, id); | |
79 | break; | |
80 | default: | |
b977fcf4 | 81 | n = kasprintf(GFP_KERNEL, "irqchip@%pa", pa); |
d59f6617 TG |
82 | break; |
83 | } | |
84 | ||
85 | if (!fwid || !n) { | |
b145dcc4 | 86 | kfree(fwid); |
d59f6617 | 87 | kfree(n); |
b145dcc4 MZ |
88 | return NULL; |
89 | } | |
90 | ||
d59f6617 TG |
91 | fwid->type = type; |
92 | fwid->name = n; | |
b977fcf4 | 93 | fwid->pa = pa; |
db3e50f3 | 94 | fwid->fwnode.ops = &irqchip_fwnode_ops; |
b145dcc4 MZ |
95 | return &fwid->fwnode; |
96 | } | |
d59f6617 | 97 | EXPORT_SYMBOL_GPL(__irq_domain_alloc_fwnode); |
b145dcc4 MZ |
98 | |
99 | /** | |
100 | * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle | |
101 | * | |
102 | * Free a fwnode_handle allocated with irq_domain_alloc_fwnode. | |
103 | */ | |
104 | void irq_domain_free_fwnode(struct fwnode_handle *fwnode) | |
105 | { | |
106 | struct irqchip_fwid *fwid; | |
107 | ||
75aba7b0 | 108 | if (WARN_ON(!is_fwnode_irqchip(fwnode))) |
b145dcc4 MZ |
109 | return; |
110 | ||
111 | fwid = container_of(fwnode, struct irqchip_fwid, fwnode); | |
112 | kfree(fwid->name); | |
113 | kfree(fwid); | |
114 | } | |
a4289dc2 | 115 | EXPORT_SYMBOL_GPL(irq_domain_free_fwnode); |
b145dcc4 | 116 | |
cc79ca69 | 117 | /** |
fa40f377 | 118 | * __irq_domain_add() - Allocate a new irq_domain data structure |
545d5d65 | 119 | * @fwnode: firmware node for the interrupt controller |
fa40f377 | 120 | * @size: Size of linear map; 0 for radix mapping only |
a257954b | 121 | * @hwirq_max: Maximum number of interrupts supported by controller |
fa40f377 GL |
122 | * @direct_max: Maximum value of direct maps; Use ~0 for no limit; 0 for no |
123 | * direct mapping | |
f8264e34 | 124 | * @ops: domain callbacks |
a8db8cf0 | 125 | * @host_data: Controller private data pointer |
cc79ca69 | 126 | * |
3a1d24ca | 127 | * Allocates and initializes an irq_domain structure. |
a257954b | 128 | * Returns pointer to IRQ domain, or NULL on failure. |
cc79ca69 | 129 | */ |
1bf4ddc4 | 130 | struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size, |
ddaf144c | 131 | irq_hw_number_t hwirq_max, int direct_max, |
fa40f377 GL |
132 | const struct irq_domain_ops *ops, |
133 | void *host_data) | |
cc79ca69 | 134 | { |
545d5d65 | 135 | struct device_node *of_node = to_of_node(fwnode); |
d59f6617 | 136 | struct irqchip_fwid *fwid; |
a8db8cf0 | 137 | struct irq_domain *domain; |
cc79ca69 | 138 | |
d59f6617 TG |
139 | static atomic_t unknown_domains; |
140 | ||
cef5075c GL |
141 | domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size), |
142 | GFP_KERNEL, of_node_to_nid(of_node)); | |
43b98d87 | 143 | if (!domain) |
cc79ca69 GL |
144 | return NULL; |
145 | ||
d59f6617 TG |
146 | if (fwnode && is_fwnode_irqchip(fwnode)) { |
147 | fwid = container_of(fwnode, struct irqchip_fwid, fwnode); | |
148 | ||
149 | switch (fwid->type) { | |
150 | case IRQCHIP_FWNODE_NAMED: | |
151 | case IRQCHIP_FWNODE_NAMED_ID: | |
711419e5 | 152 | domain->fwnode = fwnode; |
d59f6617 TG |
153 | domain->name = kstrdup(fwid->name, GFP_KERNEL); |
154 | if (!domain->name) { | |
155 | kfree(domain); | |
156 | return NULL; | |
157 | } | |
158 | domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED; | |
159 | break; | |
160 | default: | |
161 | domain->fwnode = fwnode; | |
162 | domain->name = fwid->name; | |
163 | break; | |
164 | } | |
c5c601c4 MZ |
165 | #ifdef CONFIG_ACPI |
166 | } else if (is_acpi_device_node(fwnode)) { | |
167 | struct acpi_buffer buf = { | |
168 | .length = ACPI_ALLOCATE_BUFFER, | |
169 | }; | |
170 | acpi_handle handle; | |
171 | ||
172 | handle = acpi_device_handle(to_acpi_device_node(fwnode)); | |
173 | if (acpi_get_name(handle, ACPI_FULL_PATHNAME, &buf) == AE_OK) { | |
174 | domain->name = buf.pointer; | |
175 | domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED; | |
176 | } | |
177 | ||
178 | domain->fwnode = fwnode; | |
179 | #endif | |
d59f6617 TG |
180 | } else if (of_node) { |
181 | char *name; | |
182 | ||
183 | /* | |
184 | * DT paths contain '/', which debugfs is legitimately | |
185 | * unhappy about. Replace them with ':', which does | |
186 | * the trick and is not as offensive as '\'... | |
187 | */ | |
94967b55 | 188 | name = kasprintf(GFP_KERNEL, "%pOF", of_node); |
d59f6617 TG |
189 | if (!name) { |
190 | kfree(domain); | |
191 | return NULL; | |
192 | } | |
193 | ||
194 | strreplace(name, '/', ':'); | |
195 | ||
196 | domain->name = name; | |
197 | domain->fwnode = fwnode; | |
198 | domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED; | |
199 | } | |
200 | ||
201 | if (!domain->name) { | |
db3e50f3 SA |
202 | if (fwnode) |
203 | pr_err("Invalid fwnode type for irqdomain\n"); | |
d59f6617 TG |
204 | domain->name = kasprintf(GFP_KERNEL, "unknown-%d", |
205 | atomic_inc_return(&unknown_domains)); | |
206 | if (!domain->name) { | |
207 | kfree(domain); | |
208 | return NULL; | |
209 | } | |
210 | domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED; | |
211 | } | |
212 | ||
f110711a | 213 | of_node_get(of_node); |
f110711a | 214 | |
cc79ca69 | 215 | /* Fill structure */ |
1aa0dd94 | 216 | INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL); |
f1d78358 | 217 | mutex_init(&domain->revmap_tree_mutex); |
68700650 | 218 | domain->ops = ops; |
a8db8cf0 | 219 | domain->host_data = host_data; |
ddaf144c | 220 | domain->hwirq_max = hwirq_max; |
1aa0dd94 | 221 | domain->revmap_size = size; |
fa40f377 | 222 | domain->revmap_direct_max_irq = direct_max; |
f8264e34 | 223 | irq_domain_check_hierarchy(domain); |
cc79ca69 | 224 | |
a8db8cf0 | 225 | mutex_lock(&irq_domain_mutex); |
087cdfb6 | 226 | debugfs_add_domain_dir(domain); |
a8db8cf0 GL |
227 | list_add(&domain->link, &irq_domain_list); |
228 | mutex_unlock(&irq_domain_mutex); | |
fa40f377 | 229 | |
1aa0dd94 | 230 | pr_debug("Added domain %s\n", domain->name); |
fa40f377 | 231 | return domain; |
a8db8cf0 | 232 | } |
fa40f377 | 233 | EXPORT_SYMBOL_GPL(__irq_domain_add); |
a8db8cf0 | 234 | |
58ee99ad PM |
235 | /** |
236 | * irq_domain_remove() - Remove an irq domain. | |
237 | * @domain: domain to remove | |
238 | * | |
239 | * This routine is used to remove an irq domain. The caller must ensure | |
240 | * that all mappings within the domain have been disposed of prior to | |
241 | * use, depending on the revmap type. | |
242 | */ | |
243 | void irq_domain_remove(struct irq_domain *domain) | |
244 | { | |
245 | mutex_lock(&irq_domain_mutex); | |
087cdfb6 | 246 | debugfs_remove_domain_dir(domain); |
58ee99ad | 247 | |
e9256efc | 248 | WARN_ON(!radix_tree_empty(&domain->revmap_tree)); |
58ee99ad PM |
249 | |
250 | list_del(&domain->link); | |
251 | ||
252 | /* | |
253 | * If the going away domain is the default one, reset it. | |
254 | */ | |
255 | if (unlikely(irq_default_domain == domain)) | |
256 | irq_set_default_host(NULL); | |
257 | ||
258 | mutex_unlock(&irq_domain_mutex); | |
259 | ||
1aa0dd94 | 260 | pr_debug("Removed domain %s\n", domain->name); |
58ee99ad | 261 | |
5d4c9bc7 | 262 | of_node_put(irq_domain_get_of_node(domain)); |
d59f6617 TG |
263 | if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED) |
264 | kfree(domain->name); | |
fa40f377 | 265 | kfree(domain); |
58ee99ad | 266 | } |
ecd84eb2 | 267 | EXPORT_SYMBOL_GPL(irq_domain_remove); |
58ee99ad | 268 | |
61d0a000 MZ |
269 | void irq_domain_update_bus_token(struct irq_domain *domain, |
270 | enum irq_domain_bus_token bus_token) | |
271 | { | |
272 | char *name; | |
273 | ||
274 | if (domain->bus_token == bus_token) | |
275 | return; | |
276 | ||
277 | mutex_lock(&irq_domain_mutex); | |
278 | ||
279 | domain->bus_token = bus_token; | |
280 | ||
281 | name = kasprintf(GFP_KERNEL, "%s-%d", domain->name, bus_token); | |
282 | if (!name) { | |
283 | mutex_unlock(&irq_domain_mutex); | |
284 | return; | |
285 | } | |
286 | ||
287 | debugfs_remove_domain_dir(domain); | |
288 | ||
289 | if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED) | |
290 | kfree(domain->name); | |
291 | else | |
292 | domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED; | |
293 | ||
294 | domain->name = name; | |
295 | debugfs_add_domain_dir(domain); | |
296 | ||
297 | mutex_unlock(&irq_domain_mutex); | |
298 | } | |
299 | ||
781d0f46 | 300 | /** |
fa40f377 | 301 | * irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs |
781d0f46 MB |
302 | * @of_node: pointer to interrupt controller's device tree node. |
303 | * @size: total number of irqs in mapping | |
94a63da0 | 304 | * @first_irq: first number of irq block assigned to the domain, |
fa40f377 GL |
305 | * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then |
306 | * pre-map all of the irqs in the domain to virqs starting at first_irq. | |
f8264e34 | 307 | * @ops: domain callbacks |
781d0f46 MB |
308 | * @host_data: Controller private data pointer |
309 | * | |
fa40f377 GL |
310 | * Allocates an irq_domain, and optionally if first_irq is positive then also |
311 | * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq. | |
781d0f46 MB |
312 | * |
313 | * This is intended to implement the expected behaviour for most | |
fa40f377 GL |
314 | * interrupt controllers. If device tree is used, then first_irq will be 0 and |
315 | * irqs get mapped dynamically on the fly. However, if the controller requires | |
316 | * static virq assignments (non-DT boot) then it will set that up correctly. | |
781d0f46 MB |
317 | */ |
318 | struct irq_domain *irq_domain_add_simple(struct device_node *of_node, | |
319 | unsigned int size, | |
320 | unsigned int first_irq, | |
321 | const struct irq_domain_ops *ops, | |
322 | void *host_data) | |
323 | { | |
fa40f377 GL |
324 | struct irq_domain *domain; |
325 | ||
1bf4ddc4 | 326 | domain = __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data); |
fa40f377 GL |
327 | if (!domain) |
328 | return NULL; | |
2854d167 | 329 | |
fa40f377 | 330 | if (first_irq > 0) { |
2854d167 | 331 | if (IS_ENABLED(CONFIG_SPARSE_IRQ)) { |
fa40f377 GL |
332 | /* attempt to allocated irq_descs */ |
333 | int rc = irq_alloc_descs(first_irq, first_irq, size, | |
334 | of_node_to_nid(of_node)); | |
335 | if (rc < 0) | |
d202b7b9 LW |
336 | pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n", |
337 | first_irq); | |
fa40f377 | 338 | } |
ddaf144c | 339 | irq_domain_associate_many(domain, first_irq, 0, size); |
2854d167 LW |
340 | } |
341 | ||
fa40f377 | 342 | return domain; |
781d0f46 | 343 | } |
346dbb79 | 344 | EXPORT_SYMBOL_GPL(irq_domain_add_simple); |
781d0f46 | 345 | |
a8db8cf0 GL |
346 | /** |
347 | * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain. | |
348 | * @of_node: pointer to interrupt controller's device tree node. | |
1bc04f2c GL |
349 | * @size: total number of irqs in legacy mapping |
350 | * @first_irq: first number of irq block assigned to the domain | |
351 | * @first_hwirq: first hwirq number to use for the translation. Should normally | |
352 | * be '0', but a positive integer can be used if the effective | |
353 | * hwirqs numbering does not begin at zero. | |
a8db8cf0 GL |
354 | * @ops: map/unmap domain callbacks |
355 | * @host_data: Controller private data pointer | |
356 | * | |
357 | * Note: the map() callback will be called before this function returns | |
358 | * for all legacy interrupts except 0 (which is always the invalid irq for | |
359 | * a legacy controller). | |
360 | */ | |
361 | struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, | |
1bc04f2c GL |
362 | unsigned int size, |
363 | unsigned int first_irq, | |
364 | irq_hw_number_t first_hwirq, | |
a18dc81b | 365 | const struct irq_domain_ops *ops, |
a8db8cf0 GL |
366 | void *host_data) |
367 | { | |
1bc04f2c | 368 | struct irq_domain *domain; |
a8db8cf0 | 369 | |
1bf4ddc4 | 370 | domain = __irq_domain_add(of_node_to_fwnode(of_node), first_hwirq + size, |
ddaf144c | 371 | first_hwirq + size, 0, ops, host_data); |
f8264e34 JL |
372 | if (domain) |
373 | irq_domain_associate_many(domain, first_irq, first_hwirq, size); | |
1bc04f2c | 374 | |
a8db8cf0 GL |
375 | return domain; |
376 | } | |
ecd84eb2 | 377 | EXPORT_SYMBOL_GPL(irq_domain_add_legacy); |
a8db8cf0 | 378 | |
cc79ca69 | 379 | /** |
651e8b54 MZ |
380 | * irq_find_matching_fwspec() - Locates a domain for a given fwspec |
381 | * @fwspec: FW specifier for an interrupt | |
ad3aedfb | 382 | * @bus_token: domain-specific data |
cc79ca69 | 383 | */ |
651e8b54 | 384 | struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec, |
130b8c6c | 385 | enum irq_domain_bus_token bus_token) |
cc79ca69 GL |
386 | { |
387 | struct irq_domain *h, *found = NULL; | |
651e8b54 | 388 | struct fwnode_handle *fwnode = fwspec->fwnode; |
a18dc81b | 389 | int rc; |
cc79ca69 GL |
390 | |
391 | /* We might want to match the legacy controller last since | |
392 | * it might potentially be set to match all interrupts in | |
393 | * the absence of a device node. This isn't a problem so far | |
394 | * yet though... | |
ad3aedfb MZ |
395 | * |
396 | * bus_token == DOMAIN_BUS_ANY matches any domain, any other | |
397 | * values must generate an exact match for the domain to be | |
398 | * selected. | |
cc79ca69 GL |
399 | */ |
400 | mutex_lock(&irq_domain_mutex); | |
a18dc81b | 401 | list_for_each_entry(h, &irq_domain_list, link) { |
651e8b54 MZ |
402 | if (h->ops->select && fwspec->param_count) |
403 | rc = h->ops->select(h, fwspec, bus_token); | |
404 | else if (h->ops->match) | |
130b8c6c | 405 | rc = h->ops->match(h, to_of_node(fwnode), bus_token); |
a18dc81b | 406 | else |
130b8c6c | 407 | rc = ((fwnode != NULL) && (h->fwnode == fwnode) && |
ad3aedfb MZ |
408 | ((bus_token == DOMAIN_BUS_ANY) || |
409 | (h->bus_token == bus_token))); | |
a18dc81b GL |
410 | |
411 | if (rc) { | |
cc79ca69 GL |
412 | found = h; |
413 | break; | |
414 | } | |
a18dc81b | 415 | } |
cc79ca69 GL |
416 | mutex_unlock(&irq_domain_mutex); |
417 | return found; | |
418 | } | |
651e8b54 | 419 | EXPORT_SYMBOL_GPL(irq_find_matching_fwspec); |
cc79ca69 | 420 | |
c7b41f0a EA |
421 | /** |
422 | * irq_domain_check_msi_remap - Check whether all MSI irq domains implement | |
423 | * IRQ remapping | |
424 | * | |
425 | * Return: false if any MSI irq domain does not support IRQ remapping, | |
426 | * true otherwise (including if there is no MSI irq domain) | |
427 | */ | |
428 | bool irq_domain_check_msi_remap(void) | |
429 | { | |
430 | struct irq_domain *h; | |
431 | bool ret = true; | |
432 | ||
433 | mutex_lock(&irq_domain_mutex); | |
434 | list_for_each_entry(h, &irq_domain_list, link) { | |
435 | if (irq_domain_is_msi(h) && | |
436 | !irq_domain_hierarchical_is_msi_remap(h)) { | |
437 | ret = false; | |
438 | break; | |
439 | } | |
440 | } | |
441 | mutex_unlock(&irq_domain_mutex); | |
442 | return ret; | |
443 | } | |
444 | EXPORT_SYMBOL_GPL(irq_domain_check_msi_remap); | |
445 | ||
cc79ca69 GL |
446 | /** |
447 | * irq_set_default_host() - Set a "default" irq domain | |
68700650 | 448 | * @domain: default domain pointer |
cc79ca69 GL |
449 | * |
450 | * For convenience, it's possible to set a "default" domain that will be used | |
451 | * whenever NULL is passed to irq_create_mapping(). It makes life easier for | |
452 | * platforms that want to manipulate a few hard coded interrupt numbers that | |
453 | * aren't properly represented in the device-tree. | |
454 | */ | |
68700650 | 455 | void irq_set_default_host(struct irq_domain *domain) |
cc79ca69 | 456 | { |
54a90588 | 457 | pr_debug("Default domain set to @0x%p\n", domain); |
cc79ca69 | 458 | |
68700650 | 459 | irq_default_domain = domain; |
cc79ca69 | 460 | } |
ecd84eb2 | 461 | EXPORT_SYMBOL_GPL(irq_set_default_host); |
cc79ca69 | 462 | |
9f199dd3 MZ |
463 | /** |
464 | * irq_get_default_host() - Retrieve the "default" irq domain | |
465 | * | |
466 | * Returns: the default domain, if any. | |
467 | * | |
468 | * Modern code should never use this. This should only be used on | |
469 | * systems that cannot implement a firmware->fwnode mapping (which | |
470 | * both DT and ACPI provide). | |
471 | */ | |
472 | struct irq_domain *irq_get_default_host(void) | |
473 | { | |
474 | return irq_default_domain; | |
475 | } | |
476 | ||
b526adfe DD |
477 | static void irq_domain_clear_mapping(struct irq_domain *domain, |
478 | irq_hw_number_t hwirq) | |
479 | { | |
480 | if (hwirq < domain->revmap_size) { | |
481 | domain->linear_revmap[hwirq] = 0; | |
482 | } else { | |
f1d78358 | 483 | mutex_lock(&domain->revmap_tree_mutex); |
b526adfe | 484 | radix_tree_delete(&domain->revmap_tree, hwirq); |
f1d78358 | 485 | mutex_unlock(&domain->revmap_tree_mutex); |
b526adfe DD |
486 | } |
487 | } | |
488 | ||
489 | static void irq_domain_set_mapping(struct irq_domain *domain, | |
490 | irq_hw_number_t hwirq, | |
491 | struct irq_data *irq_data) | |
492 | { | |
493 | if (hwirq < domain->revmap_size) { | |
494 | domain->linear_revmap[hwirq] = irq_data->irq; | |
495 | } else { | |
f1d78358 | 496 | mutex_lock(&domain->revmap_tree_mutex); |
b526adfe | 497 | radix_tree_insert(&domain->revmap_tree, hwirq, irq_data); |
f1d78358 | 498 | mutex_unlock(&domain->revmap_tree_mutex); |
b526adfe DD |
499 | } |
500 | } | |
501 | ||
43a77591 | 502 | void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq) |
913af207 | 503 | { |
ddaf144c GL |
504 | struct irq_data *irq_data = irq_get_irq_data(irq); |
505 | irq_hw_number_t hwirq; | |
913af207 | 506 | |
ddaf144c GL |
507 | if (WARN(!irq_data || irq_data->domain != domain, |
508 | "virq%i doesn't exist; cannot disassociate\n", irq)) | |
509 | return; | |
913af207 | 510 | |
ddaf144c GL |
511 | hwirq = irq_data->hwirq; |
512 | irq_set_status_flags(irq, IRQ_NOREQUEST); | |
913af207 | 513 | |
ddaf144c GL |
514 | /* remove chip and handler */ |
515 | irq_set_chip_and_handler(irq, NULL, NULL); | |
913af207 | 516 | |
ddaf144c GL |
517 | /* Make sure it's completed */ |
518 | synchronize_irq(irq); | |
913af207 | 519 | |
ddaf144c GL |
520 | /* Tell the PIC about it */ |
521 | if (domain->ops->unmap) | |
522 | domain->ops->unmap(domain, irq); | |
523 | smp_mb(); | |
913af207 | 524 | |
ddaf144c GL |
525 | irq_data->domain = NULL; |
526 | irq_data->hwirq = 0; | |
9dc6be3d | 527 | domain->mapcount--; |
913af207 | 528 | |
ddaf144c | 529 | /* Clear reverse map for this hwirq */ |
b526adfe | 530 | irq_domain_clear_mapping(domain, hwirq); |
913af207 GL |
531 | } |
532 | ||
ddaf144c GL |
533 | int irq_domain_associate(struct irq_domain *domain, unsigned int virq, |
534 | irq_hw_number_t hwirq) | |
cc79ca69 | 535 | { |
ddaf144c GL |
536 | struct irq_data *irq_data = irq_get_irq_data(virq); |
537 | int ret; | |
cc79ca69 | 538 | |
ddaf144c GL |
539 | if (WARN(hwirq >= domain->hwirq_max, |
540 | "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name)) | |
541 | return -EINVAL; | |
542 | if (WARN(!irq_data, "error: virq%i is not allocated", virq)) | |
543 | return -EINVAL; | |
544 | if (WARN(irq_data->domain, "error: virq%i is already associated", virq)) | |
545 | return -EINVAL; | |
cc79ca69 | 546 | |
ddaf144c GL |
547 | mutex_lock(&irq_domain_mutex); |
548 | irq_data->hwirq = hwirq; | |
549 | irq_data->domain = domain; | |
550 | if (domain->ops->map) { | |
551 | ret = domain->ops->map(domain, virq, hwirq); | |
552 | if (ret != 0) { | |
553 | /* | |
554 | * If map() returns -EPERM, this interrupt is protected | |
555 | * by the firmware or some other service and shall not | |
556 | * be mapped. Don't bother telling the user about it. | |
557 | */ | |
558 | if (ret != -EPERM) { | |
559 | pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n", | |
560 | domain->name, hwirq, virq, ret); | |
f5a1ad05 | 561 | } |
ddaf144c GL |
562 | irq_data->domain = NULL; |
563 | irq_data->hwirq = 0; | |
564 | mutex_unlock(&irq_domain_mutex); | |
565 | return ret; | |
98aa468e GL |
566 | } |
567 | ||
ddaf144c GL |
568 | /* If not already assigned, give the domain the chip's name */ |
569 | if (!domain->name && irq_data->chip) | |
570 | domain->name = irq_data->chip->name; | |
571 | } | |
2a71a1a9 | 572 | |
9dc6be3d | 573 | domain->mapcount++; |
b526adfe | 574 | irq_domain_set_mapping(domain, hwirq, irq_data); |
ddaf144c GL |
575 | mutex_unlock(&irq_domain_mutex); |
576 | ||
577 | irq_clear_status_flags(virq, IRQ_NOREQUEST); | |
cc79ca69 GL |
578 | |
579 | return 0; | |
580 | } | |
ddaf144c | 581 | EXPORT_SYMBOL_GPL(irq_domain_associate); |
98aa468e | 582 | |
ddaf144c GL |
583 | void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base, |
584 | irq_hw_number_t hwirq_base, int count) | |
585 | { | |
5d4c9bc7 | 586 | struct device_node *of_node; |
ddaf144c GL |
587 | int i; |
588 | ||
5d4c9bc7 | 589 | of_node = irq_domain_get_of_node(domain); |
ddaf144c | 590 | pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__, |
5d4c9bc7 | 591 | of_node_full_name(of_node), irq_base, (int)hwirq_base, count); |
ddaf144c GL |
592 | |
593 | for (i = 0; i < count; i++) { | |
594 | irq_domain_associate(domain, irq_base + i, hwirq_base + i); | |
595 | } | |
cc79ca69 | 596 | } |
98aa468e | 597 | EXPORT_SYMBOL_GPL(irq_domain_associate_many); |
cc79ca69 GL |
598 | |
599 | /** | |
600 | * irq_create_direct_mapping() - Allocate an irq for direct mapping | |
68700650 | 601 | * @domain: domain to allocate the irq for or NULL for default domain |
cc79ca69 GL |
602 | * |
603 | * This routine is used for irq controllers which can choose the hardware | |
604 | * interrupt numbers they generate. In such a case it's simplest to use | |
1aa0dd94 GL |
605 | * the linux irq as the hardware interrupt number. It still uses the linear |
606 | * or radix tree to store the mapping, but the irq controller can optimize | |
607 | * the revmap path by using the hwirq directly. | |
cc79ca69 | 608 | */ |
68700650 | 609 | unsigned int irq_create_direct_mapping(struct irq_domain *domain) |
cc79ca69 | 610 | { |
5d4c9bc7 | 611 | struct device_node *of_node; |
cc79ca69 GL |
612 | unsigned int virq; |
613 | ||
68700650 GL |
614 | if (domain == NULL) |
615 | domain = irq_default_domain; | |
cc79ca69 | 616 | |
5d4c9bc7 MZ |
617 | of_node = irq_domain_get_of_node(domain); |
618 | virq = irq_alloc_desc_from(1, of_node_to_nid(of_node)); | |
03848373 | 619 | if (!virq) { |
54a90588 | 620 | pr_debug("create_direct virq allocation failed\n"); |
03848373 | 621 | return 0; |
cc79ca69 | 622 | } |
1aa0dd94 | 623 | if (virq >= domain->revmap_direct_max_irq) { |
cc79ca69 | 624 | pr_err("ERROR: no free irqs available below %i maximum\n", |
1aa0dd94 | 625 | domain->revmap_direct_max_irq); |
cc79ca69 GL |
626 | irq_free_desc(virq); |
627 | return 0; | |
628 | } | |
54a90588 | 629 | pr_debug("create_direct obtained virq %d\n", virq); |
cc79ca69 | 630 | |
98aa468e | 631 | if (irq_domain_associate(domain, virq, virq)) { |
cc79ca69 | 632 | irq_free_desc(virq); |
03848373 | 633 | return 0; |
cc79ca69 GL |
634 | } |
635 | ||
636 | return virq; | |
637 | } | |
ecd84eb2 | 638 | EXPORT_SYMBOL_GPL(irq_create_direct_mapping); |
cc79ca69 GL |
639 | |
640 | /** | |
641 | * irq_create_mapping() - Map a hardware interrupt into linux irq space | |
68700650 GL |
642 | * @domain: domain owning this hardware interrupt or NULL for default domain |
643 | * @hwirq: hardware irq number in that domain space | |
cc79ca69 GL |
644 | * |
645 | * Only one mapping per hardware interrupt is permitted. Returns a linux | |
646 | * irq number. | |
647 | * If the sense/trigger is to be specified, set_irq_type() should be called | |
648 | * on the number returned from that call. | |
649 | */ | |
68700650 | 650 | unsigned int irq_create_mapping(struct irq_domain *domain, |
cc79ca69 GL |
651 | irq_hw_number_t hwirq) |
652 | { | |
5d4c9bc7 | 653 | struct device_node *of_node; |
5b7526e3 | 654 | int virq; |
cc79ca69 | 655 | |
54a90588 | 656 | pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq); |
cc79ca69 | 657 | |
68700650 GL |
658 | /* Look for default domain if nececssary */ |
659 | if (domain == NULL) | |
660 | domain = irq_default_domain; | |
661 | if (domain == NULL) { | |
798f0fd1 | 662 | WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq); |
03848373 | 663 | return 0; |
cc79ca69 | 664 | } |
54a90588 | 665 | pr_debug("-> using domain @%p\n", domain); |
cc79ca69 | 666 | |
5d4c9bc7 MZ |
667 | of_node = irq_domain_get_of_node(domain); |
668 | ||
cc79ca69 | 669 | /* Check if mapping already exists */ |
68700650 | 670 | virq = irq_find_mapping(domain, hwirq); |
03848373 | 671 | if (virq) { |
54a90588 | 672 | pr_debug("-> existing mapping on virq %d\n", virq); |
cc79ca69 GL |
673 | return virq; |
674 | } | |
675 | ||
1bc04f2c | 676 | /* Allocate a virtual interrupt number */ |
06ee6d57 | 677 | virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node), NULL); |
5b7526e3 | 678 | if (virq <= 0) { |
54a90588 | 679 | pr_debug("-> virq allocation failed\n"); |
1bc04f2c | 680 | return 0; |
cc79ca69 GL |
681 | } |
682 | ||
98aa468e | 683 | if (irq_domain_associate(domain, virq, hwirq)) { |
73255704 | 684 | irq_free_desc(virq); |
03848373 | 685 | return 0; |
cc79ca69 GL |
686 | } |
687 | ||
54a90588 | 688 | pr_debug("irq %lu on domain %s mapped to virtual irq %u\n", |
5d4c9bc7 | 689 | hwirq, of_node_full_name(of_node), virq); |
cc79ca69 GL |
690 | |
691 | return virq; | |
692 | } | |
693 | EXPORT_SYMBOL_GPL(irq_create_mapping); | |
694 | ||
98aa468e GL |
695 | /** |
696 | * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs | |
697 | * @domain: domain owning the interrupt range | |
698 | * @irq_base: beginning of linux IRQ range | |
699 | * @hwirq_base: beginning of hardware IRQ range | |
700 | * @count: Number of interrupts to map | |
701 | * | |
702 | * This routine is used for allocating and mapping a range of hardware | |
703 | * irqs to linux irqs where the linux irq numbers are at pre-defined | |
704 | * locations. For use by controllers that already have static mappings | |
705 | * to insert in to the domain. | |
706 | * | |
707 | * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time | |
708 | * domain insertion. | |
709 | * | |
710 | * 0 is returned upon success, while any failure to establish a static | |
711 | * mapping is treated as an error. | |
712 | */ | |
713 | int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base, | |
714 | irq_hw_number_t hwirq_base, int count) | |
715 | { | |
5d4c9bc7 | 716 | struct device_node *of_node; |
98aa468e GL |
717 | int ret; |
718 | ||
5d4c9bc7 | 719 | of_node = irq_domain_get_of_node(domain); |
98aa468e | 720 | ret = irq_alloc_descs(irq_base, irq_base, count, |
5d4c9bc7 | 721 | of_node_to_nid(of_node)); |
98aa468e GL |
722 | if (unlikely(ret < 0)) |
723 | return ret; | |
724 | ||
ddaf144c | 725 | irq_domain_associate_many(domain, irq_base, hwirq_base, count); |
98aa468e GL |
726 | return 0; |
727 | } | |
728 | EXPORT_SYMBOL_GPL(irq_create_strict_mappings); | |
729 | ||
11e4438e MZ |
730 | static int irq_domain_translate(struct irq_domain *d, |
731 | struct irq_fwspec *fwspec, | |
732 | irq_hw_number_t *hwirq, unsigned int *type) | |
733 | { | |
734 | #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY | |
735 | if (d->ops->translate) | |
736 | return d->ops->translate(d, fwspec, hwirq, type); | |
737 | #endif | |
738 | if (d->ops->xlate) | |
739 | return d->ops->xlate(d, to_of_node(fwspec->fwnode), | |
740 | fwspec->param, fwspec->param_count, | |
741 | hwirq, type); | |
742 | ||
743 | /* If domain has no translation, then we assume interrupt line */ | |
744 | *hwirq = fwspec->param[0]; | |
745 | return 0; | |
746 | } | |
747 | ||
b5c231d8 BM |
748 | static void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args, |
749 | unsigned int count, | |
11e4438e MZ |
750 | struct irq_fwspec *fwspec) |
751 | { | |
752 | int i; | |
753 | ||
b5c231d8 BM |
754 | fwspec->fwnode = np ? &np->fwnode : NULL; |
755 | fwspec->param_count = count; | |
11e4438e | 756 | |
b5c231d8 BM |
757 | for (i = 0; i < count; i++) |
758 | fwspec->param[i] = args[i]; | |
11e4438e MZ |
759 | } |
760 | ||
c0131f09 | 761 | unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec) |
cc79ca69 | 762 | { |
68700650 | 763 | struct irq_domain *domain; |
1e2a7d78 | 764 | struct irq_data *irq_data; |
cc79ca69 GL |
765 | irq_hw_number_t hwirq; |
766 | unsigned int type = IRQ_TYPE_NONE; | |
f8264e34 | 767 | int virq; |
cc79ca69 | 768 | |
530cbe10 | 769 | if (fwspec->fwnode) { |
651e8b54 | 770 | domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_WIRED); |
530cbe10 | 771 | if (!domain) |
651e8b54 | 772 | domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_ANY); |
530cbe10 | 773 | } else { |
11e4438e | 774 | domain = irq_default_domain; |
530cbe10 | 775 | } |
11e4438e | 776 | |
68700650 | 777 | if (!domain) { |
798f0fd1 | 778 | pr_warn("no irq domain found for %s !\n", |
c0131f09 | 779 | of_node_full_name(to_of_node(fwspec->fwnode))); |
03848373 | 780 | return 0; |
cc79ca69 GL |
781 | } |
782 | ||
c0131f09 | 783 | if (irq_domain_translate(domain, fwspec, &hwirq, &type)) |
11e4438e | 784 | return 0; |
cc79ca69 | 785 | |
b62b2cf5 JH |
786 | /* |
787 | * WARN if the irqchip returns a type with bits | |
788 | * outside the sense mask set and clear these bits. | |
789 | */ | |
790 | if (WARN_ON(type & ~IRQ_TYPE_SENSE_MASK)) | |
791 | type &= IRQ_TYPE_SENSE_MASK; | |
792 | ||
793 | /* | |
794 | * If we've already configured this interrupt, | |
795 | * don't do it again, or hell will break loose. | |
796 | */ | |
797 | virq = irq_find_mapping(domain, hwirq); | |
798 | if (virq) { | |
0cc01aba | 799 | /* |
b62b2cf5 JH |
800 | * If the trigger type is not specified or matches the |
801 | * current trigger type then we are done so return the | |
802 | * interrupt number. | |
0cc01aba | 803 | */ |
b62b2cf5 | 804 | if (type == IRQ_TYPE_NONE || type == irq_get_trigger_type(virq)) |
0cc01aba YC |
805 | return virq; |
806 | ||
b62b2cf5 JH |
807 | /* |
808 | * If the trigger type has not been set yet, then set | |
809 | * it now and return the interrupt number. | |
810 | */ | |
811 | if (irq_get_trigger_type(virq) == IRQ_TYPE_NONE) { | |
1e2a7d78 JH |
812 | irq_data = irq_get_irq_data(virq); |
813 | if (!irq_data) | |
814 | return 0; | |
815 | ||
816 | irqd_set_trigger_type(irq_data, type); | |
b62b2cf5 JH |
817 | return virq; |
818 | } | |
819 | ||
820 | pr_warn("type mismatch, failed to map hwirq-%lu for %s!\n", | |
821 | hwirq, of_node_full_name(to_of_node(fwspec->fwnode))); | |
822 | return 0; | |
823 | } | |
824 | ||
825 | if (irq_domain_is_hierarchy(domain)) { | |
c0131f09 | 826 | virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, fwspec); |
0cc01aba YC |
827 | if (virq <= 0) |
828 | return 0; | |
829 | } else { | |
830 | /* Create mapping */ | |
831 | virq = irq_create_mapping(domain, hwirq); | |
832 | if (!virq) | |
833 | return virq; | |
834 | } | |
cc79ca69 | 835 | |
1e2a7d78 JH |
836 | irq_data = irq_get_irq_data(virq); |
837 | if (!irq_data) { | |
838 | if (irq_domain_is_hierarchy(domain)) | |
839 | irq_domain_free_irqs(virq, 1); | |
840 | else | |
841 | irq_dispose_mapping(virq); | |
842 | return 0; | |
843 | } | |
844 | ||
845 | /* Store trigger type */ | |
846 | irqd_set_trigger_type(irq_data, type); | |
847 | ||
cc79ca69 GL |
848 | return virq; |
849 | } | |
c0131f09 MZ |
850 | EXPORT_SYMBOL_GPL(irq_create_fwspec_mapping); |
851 | ||
852 | unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data) | |
853 | { | |
854 | struct irq_fwspec fwspec; | |
855 | ||
b5c231d8 BM |
856 | of_phandle_args_to_fwspec(irq_data->np, irq_data->args, |
857 | irq_data->args_count, &fwspec); | |
858 | ||
c0131f09 MZ |
859 | return irq_create_fwspec_mapping(&fwspec); |
860 | } | |
cc79ca69 GL |
861 | EXPORT_SYMBOL_GPL(irq_create_of_mapping); |
862 | ||
863 | /** | |
864 | * irq_dispose_mapping() - Unmap an interrupt | |
865 | * @virq: linux irq number of the interrupt to unmap | |
866 | */ | |
867 | void irq_dispose_mapping(unsigned int virq) | |
868 | { | |
869 | struct irq_data *irq_data = irq_get_irq_data(virq); | |
68700650 | 870 | struct irq_domain *domain; |
cc79ca69 | 871 | |
03848373 | 872 | if (!virq || !irq_data) |
cc79ca69 GL |
873 | return; |
874 | ||
68700650 GL |
875 | domain = irq_data->domain; |
876 | if (WARN_ON(domain == NULL)) | |
cc79ca69 GL |
877 | return; |
878 | ||
d16dcd3d JH |
879 | if (irq_domain_is_hierarchy(domain)) { |
880 | irq_domain_free_irqs(virq, 1); | |
881 | } else { | |
882 | irq_domain_disassociate(domain, virq); | |
883 | irq_free_desc(virq); | |
884 | } | |
cc79ca69 GL |
885 | } |
886 | EXPORT_SYMBOL_GPL(irq_dispose_mapping); | |
887 | ||
888 | /** | |
b8d62f33 | 889 | * irq_find_mapping() - Find a linux irq from a hw irq number. |
68700650 GL |
890 | * @domain: domain owning this hardware interrupt |
891 | * @hwirq: hardware irq number in that domain space | |
cc79ca69 | 892 | */ |
68700650 | 893 | unsigned int irq_find_mapping(struct irq_domain *domain, |
cc79ca69 GL |
894 | irq_hw_number_t hwirq) |
895 | { | |
4c0946c4 | 896 | struct irq_data *data; |
cc79ca69 | 897 | |
68700650 GL |
898 | /* Look for default domain if nececssary */ |
899 | if (domain == NULL) | |
900 | domain = irq_default_domain; | |
901 | if (domain == NULL) | |
03848373 | 902 | return 0; |
cc79ca69 | 903 | |
1aa0dd94 | 904 | if (hwirq < domain->revmap_direct_max_irq) { |
f8264e34 JL |
905 | data = irq_domain_get_irq_data(domain, hwirq); |
906 | if (data && data->hwirq == hwirq) | |
4c0946c4 | 907 | return hwirq; |
4c0946c4 GL |
908 | } |
909 | ||
d3dcb436 GL |
910 | /* Check if the hwirq is in the linear revmap. */ |
911 | if (hwirq < domain->revmap_size) | |
912 | return domain->linear_revmap[hwirq]; | |
cc79ca69 | 913 | |
d3dcb436 GL |
914 | rcu_read_lock(); |
915 | data = radix_tree_lookup(&domain->revmap_tree, hwirq); | |
916 | rcu_read_unlock(); | |
917 | return data ? data->irq : 0; | |
cc79ca69 | 918 | } |
cc79ca69 | 919 | EXPORT_SYMBOL_GPL(irq_find_mapping); |
cc79ca69 | 920 | |
16b2e6e2 GL |
921 | /** |
922 | * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings | |
923 | * | |
924 | * Device Tree IRQ specifier translation function which works with one cell | |
925 | * bindings where the cell value maps directly to the hwirq number. | |
926 | */ | |
927 | int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr, | |
928 | const u32 *intspec, unsigned int intsize, | |
929 | unsigned long *out_hwirq, unsigned int *out_type) | |
7e713301 | 930 | { |
16b2e6e2 | 931 | if (WARN_ON(intsize < 1)) |
7e713301 | 932 | return -EINVAL; |
7e713301 GL |
933 | *out_hwirq = intspec[0]; |
934 | *out_type = IRQ_TYPE_NONE; | |
7e713301 GL |
935 | return 0; |
936 | } | |
16b2e6e2 GL |
937 | EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell); |
938 | ||
939 | /** | |
940 | * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings | |
941 | * | |
942 | * Device Tree IRQ specifier translation function which works with two cell | |
943 | * bindings where the cell values map directly to the hwirq number | |
944 | * and linux irq flags. | |
945 | */ | |
946 | int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr, | |
947 | const u32 *intspec, unsigned int intsize, | |
948 | irq_hw_number_t *out_hwirq, unsigned int *out_type) | |
949 | { | |
b5c231d8 BM |
950 | struct irq_fwspec fwspec; |
951 | ||
952 | of_phandle_args_to_fwspec(ctrlr, intspec, intsize, &fwspec); | |
953 | return irq_domain_translate_twocell(d, &fwspec, out_hwirq, out_type); | |
16b2e6e2 GL |
954 | } |
955 | EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell); | |
956 | ||
957 | /** | |
958 | * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings | |
959 | * | |
960 | * Device Tree IRQ specifier translation function which works with either one | |
961 | * or two cell bindings where the cell values map directly to the hwirq number | |
962 | * and linux irq flags. | |
963 | * | |
964 | * Note: don't use this function unless your interrupt controller explicitly | |
965 | * supports both one and two cell bindings. For the majority of controllers | |
966 | * the _onecell() or _twocell() variants above should be used. | |
967 | */ | |
968 | int irq_domain_xlate_onetwocell(struct irq_domain *d, | |
969 | struct device_node *ctrlr, | |
970 | const u32 *intspec, unsigned int intsize, | |
971 | unsigned long *out_hwirq, unsigned int *out_type) | |
972 | { | |
973 | if (WARN_ON(intsize < 1)) | |
974 | return -EINVAL; | |
975 | *out_hwirq = intspec[0]; | |
0c228919 SF |
976 | if (intsize > 1) |
977 | *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK; | |
978 | else | |
979 | *out_type = IRQ_TYPE_NONE; | |
16b2e6e2 GL |
980 | return 0; |
981 | } | |
982 | EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell); | |
7e713301 | 983 | |
a18dc81b | 984 | const struct irq_domain_ops irq_domain_simple_ops = { |
16b2e6e2 | 985 | .xlate = irq_domain_xlate_onetwocell, |
75294957 GL |
986 | }; |
987 | EXPORT_SYMBOL_GPL(irq_domain_simple_ops); | |
f8264e34 | 988 | |
b5c231d8 BM |
989 | /** |
990 | * irq_domain_translate_twocell() - Generic translate for direct two cell | |
991 | * bindings | |
992 | * | |
993 | * Device Tree IRQ specifier translation function which works with two cell | |
994 | * bindings where the cell values map directly to the hwirq number | |
995 | * and linux irq flags. | |
996 | */ | |
997 | int irq_domain_translate_twocell(struct irq_domain *d, | |
998 | struct irq_fwspec *fwspec, | |
999 | unsigned long *out_hwirq, | |
1000 | unsigned int *out_type) | |
1001 | { | |
1002 | if (WARN_ON(fwspec->param_count < 2)) | |
1003 | return -EINVAL; | |
1004 | *out_hwirq = fwspec->param[0]; | |
1005 | *out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK; | |
1006 | return 0; | |
1007 | } | |
1008 | EXPORT_SYMBOL_GPL(irq_domain_translate_twocell); | |
1009 | ||
ac0a0cd2 | 1010 | int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq, |
bec04037 | 1011 | int node, const struct irq_affinity_desc *affinity) |
f8264e34 JL |
1012 | { |
1013 | unsigned int hint; | |
1014 | ||
1015 | if (virq >= 0) { | |
06ee6d57 TG |
1016 | virq = __irq_alloc_descs(virq, virq, cnt, node, THIS_MODULE, |
1017 | affinity); | |
f8264e34 JL |
1018 | } else { |
1019 | hint = hwirq % nr_irqs; | |
1020 | if (hint == 0) | |
1021 | hint++; | |
06ee6d57 TG |
1022 | virq = __irq_alloc_descs(-1, hint, cnt, node, THIS_MODULE, |
1023 | affinity); | |
1024 | if (virq <= 0 && hint > 1) { | |
1025 | virq = __irq_alloc_descs(-1, 1, cnt, node, THIS_MODULE, | |
1026 | affinity); | |
1027 | } | |
f8264e34 JL |
1028 | } |
1029 | ||
1030 | return virq; | |
1031 | } | |
1032 | ||
1033 | #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY | |
afb7da83 | 1034 | /** |
2a5e9a07 | 1035 | * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy |
afb7da83 JL |
1036 | * @parent: Parent irq domain to associate with the new domain |
1037 | * @flags: Irq domain flags associated to the domain | |
1038 | * @size: Size of the domain. See below | |
2a5e9a07 | 1039 | * @fwnode: Optional fwnode of the interrupt controller |
afb7da83 JL |
1040 | * @ops: Pointer to the interrupt domain callbacks |
1041 | * @host_data: Controller private data pointer | |
1042 | * | |
1043 | * If @size is 0 a tree domain is created, otherwise a linear domain. | |
1044 | * | |
1045 | * If successful the parent is associated to the new domain and the | |
1046 | * domain flags are set. | |
1047 | * Returns pointer to IRQ domain, or NULL on failure. | |
1048 | */ | |
2a5e9a07 | 1049 | struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent, |
afb7da83 JL |
1050 | unsigned int flags, |
1051 | unsigned int size, | |
2a5e9a07 | 1052 | struct fwnode_handle *fwnode, |
afb7da83 JL |
1053 | const struct irq_domain_ops *ops, |
1054 | void *host_data) | |
1055 | { | |
1056 | struct irq_domain *domain; | |
1057 | ||
1058 | if (size) | |
2a5e9a07 | 1059 | domain = irq_domain_create_linear(fwnode, size, ops, host_data); |
afb7da83 | 1060 | else |
2a5e9a07 | 1061 | domain = irq_domain_create_tree(fwnode, ops, host_data); |
afb7da83 JL |
1062 | if (domain) { |
1063 | domain->parent = parent; | |
1064 | domain->flags |= flags; | |
1065 | } | |
1066 | ||
1067 | return domain; | |
1068 | } | |
52b2a05f | 1069 | EXPORT_SYMBOL_GPL(irq_domain_create_hierarchy); |
afb7da83 | 1070 | |
f8264e34 JL |
1071 | static void irq_domain_insert_irq(int virq) |
1072 | { | |
1073 | struct irq_data *data; | |
1074 | ||
1075 | for (data = irq_get_irq_data(virq); data; data = data->parent_data) { | |
1076 | struct irq_domain *domain = data->domain; | |
f8264e34 | 1077 | |
9dc6be3d | 1078 | domain->mapcount++; |
b526adfe | 1079 | irq_domain_set_mapping(domain, data->hwirq, data); |
f8264e34 JL |
1080 | |
1081 | /* If not already assigned, give the domain the chip's name */ | |
1082 | if (!domain->name && data->chip) | |
1083 | domain->name = data->chip->name; | |
1084 | } | |
1085 | ||
1086 | irq_clear_status_flags(virq, IRQ_NOREQUEST); | |
1087 | } | |
1088 | ||
1089 | static void irq_domain_remove_irq(int virq) | |
1090 | { | |
1091 | struct irq_data *data; | |
1092 | ||
1093 | irq_set_status_flags(virq, IRQ_NOREQUEST); | |
1094 | irq_set_chip_and_handler(virq, NULL, NULL); | |
1095 | synchronize_irq(virq); | |
1096 | smp_mb(); | |
1097 | ||
1098 | for (data = irq_get_irq_data(virq); data; data = data->parent_data) { | |
1099 | struct irq_domain *domain = data->domain; | |
1100 | irq_hw_number_t hwirq = data->hwirq; | |
1101 | ||
9dc6be3d | 1102 | domain->mapcount--; |
b526adfe | 1103 | irq_domain_clear_mapping(domain, hwirq); |
f8264e34 JL |
1104 | } |
1105 | } | |
1106 | ||
1107 | static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain, | |
1108 | struct irq_data *child) | |
1109 | { | |
1110 | struct irq_data *irq_data; | |
1111 | ||
6783011b JL |
1112 | irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL, |
1113 | irq_data_get_node(child)); | |
f8264e34 JL |
1114 | if (irq_data) { |
1115 | child->parent_data = irq_data; | |
1116 | irq_data->irq = child->irq; | |
0d0b4c86 | 1117 | irq_data->common = child->common; |
f8264e34 JL |
1118 | irq_data->domain = domain; |
1119 | } | |
1120 | ||
1121 | return irq_data; | |
1122 | } | |
1123 | ||
1124 | static void irq_domain_free_irq_data(unsigned int virq, unsigned int nr_irqs) | |
1125 | { | |
1126 | struct irq_data *irq_data, *tmp; | |
1127 | int i; | |
1128 | ||
1129 | for (i = 0; i < nr_irqs; i++) { | |
1130 | irq_data = irq_get_irq_data(virq + i); | |
1131 | tmp = irq_data->parent_data; | |
1132 | irq_data->parent_data = NULL; | |
1133 | irq_data->domain = NULL; | |
1134 | ||
1135 | while (tmp) { | |
1136 | irq_data = tmp; | |
1137 | tmp = tmp->parent_data; | |
1138 | kfree(irq_data); | |
1139 | } | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | static int irq_domain_alloc_irq_data(struct irq_domain *domain, | |
1144 | unsigned int virq, unsigned int nr_irqs) | |
1145 | { | |
1146 | struct irq_data *irq_data; | |
1147 | struct irq_domain *parent; | |
1148 | int i; | |
1149 | ||
1150 | /* The outermost irq_data is embedded in struct irq_desc */ | |
1151 | for (i = 0; i < nr_irqs; i++) { | |
1152 | irq_data = irq_get_irq_data(virq + i); | |
1153 | irq_data->domain = domain; | |
1154 | ||
1155 | for (parent = domain->parent; parent; parent = parent->parent) { | |
1156 | irq_data = irq_domain_insert_irq_data(parent, irq_data); | |
1157 | if (!irq_data) { | |
1158 | irq_domain_free_irq_data(virq, i + 1); | |
1159 | return -ENOMEM; | |
1160 | } | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | return 0; | |
1165 | } | |
1166 | ||
1167 | /** | |
1168 | * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain | |
1169 | * @domain: domain to match | |
1170 | * @virq: IRQ number to get irq_data | |
1171 | */ | |
1172 | struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, | |
1173 | unsigned int virq) | |
1174 | { | |
1175 | struct irq_data *irq_data; | |
1176 | ||
1177 | for (irq_data = irq_get_irq_data(virq); irq_data; | |
1178 | irq_data = irq_data->parent_data) | |
1179 | if (irq_data->domain == domain) | |
1180 | return irq_data; | |
1181 | ||
1182 | return NULL; | |
1183 | } | |
a4289dc2 | 1184 | EXPORT_SYMBOL_GPL(irq_domain_get_irq_data); |
f8264e34 JL |
1185 | |
1186 | /** | |
1187 | * irq_domain_set_hwirq_and_chip - Set hwirq and irqchip of @virq at @domain | |
1188 | * @domain: Interrupt domain to match | |
1189 | * @virq: IRQ number | |
1190 | * @hwirq: The hwirq number | |
1191 | * @chip: The associated interrupt chip | |
1192 | * @chip_data: The associated chip data | |
1193 | */ | |
1194 | int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq, | |
1195 | irq_hw_number_t hwirq, struct irq_chip *chip, | |
1196 | void *chip_data) | |
1197 | { | |
1198 | struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq); | |
1199 | ||
1200 | if (!irq_data) | |
1201 | return -ENOENT; | |
1202 | ||
1203 | irq_data->hwirq = hwirq; | |
1204 | irq_data->chip = chip ? chip : &no_irq_chip; | |
1205 | irq_data->chip_data = chip_data; | |
1206 | ||
1207 | return 0; | |
1208 | } | |
52b2a05f | 1209 | EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip); |
f8264e34 | 1210 | |
1b537708 JL |
1211 | /** |
1212 | * irq_domain_set_info - Set the complete data for a @virq in @domain | |
1213 | * @domain: Interrupt domain to match | |
1214 | * @virq: IRQ number | |
1215 | * @hwirq: The hardware interrupt number | |
1216 | * @chip: The associated interrupt chip | |
1217 | * @chip_data: The associated interrupt chip data | |
1218 | * @handler: The interrupt flow handler | |
1219 | * @handler_data: The interrupt flow handler data | |
1220 | * @handler_name: The interrupt handler name | |
1221 | */ | |
1222 | void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, | |
1223 | irq_hw_number_t hwirq, struct irq_chip *chip, | |
1224 | void *chip_data, irq_flow_handler_t handler, | |
1225 | void *handler_data, const char *handler_name) | |
1226 | { | |
1227 | irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data); | |
1228 | __irq_set_handler(virq, handler, 0, handler_name); | |
1229 | irq_set_handler_data(virq, handler_data); | |
1230 | } | |
64bce3e8 | 1231 | EXPORT_SYMBOL(irq_domain_set_info); |
1b537708 | 1232 | |
f8264e34 JL |
1233 | /** |
1234 | * irq_domain_reset_irq_data - Clear hwirq, chip and chip_data in @irq_data | |
1235 | * @irq_data: The pointer to irq_data | |
1236 | */ | |
1237 | void irq_domain_reset_irq_data(struct irq_data *irq_data) | |
1238 | { | |
1239 | irq_data->hwirq = 0; | |
1240 | irq_data->chip = &no_irq_chip; | |
1241 | irq_data->chip_data = NULL; | |
1242 | } | |
52b2a05f | 1243 | EXPORT_SYMBOL_GPL(irq_domain_reset_irq_data); |
f8264e34 JL |
1244 | |
1245 | /** | |
1246 | * irq_domain_free_irqs_common - Clear irq_data and free the parent | |
1247 | * @domain: Interrupt domain to match | |
1248 | * @virq: IRQ number to start with | |
1249 | * @nr_irqs: The number of irqs to free | |
1250 | */ | |
1251 | void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq, | |
1252 | unsigned int nr_irqs) | |
1253 | { | |
1254 | struct irq_data *irq_data; | |
1255 | int i; | |
1256 | ||
1257 | for (i = 0; i < nr_irqs; i++) { | |
1258 | irq_data = irq_domain_get_irq_data(domain, virq + i); | |
1259 | if (irq_data) | |
1260 | irq_domain_reset_irq_data(irq_data); | |
1261 | } | |
1262 | irq_domain_free_irqs_parent(domain, virq, nr_irqs); | |
1263 | } | |
63cc787e | 1264 | EXPORT_SYMBOL_GPL(irq_domain_free_irqs_common); |
f8264e34 JL |
1265 | |
1266 | /** | |
1267 | * irq_domain_free_irqs_top - Clear handler and handler data, clear irqdata and free parent | |
1268 | * @domain: Interrupt domain to match | |
1269 | * @virq: IRQ number to start with | |
1270 | * @nr_irqs: The number of irqs to free | |
1271 | */ | |
1272 | void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq, | |
1273 | unsigned int nr_irqs) | |
1274 | { | |
1275 | int i; | |
1276 | ||
1277 | for (i = 0; i < nr_irqs; i++) { | |
1278 | irq_set_handler_data(virq + i, NULL); | |
1279 | irq_set_handler(virq + i, NULL); | |
1280 | } | |
1281 | irq_domain_free_irqs_common(domain, virq, nr_irqs); | |
1282 | } | |
1283 | ||
6a6544e5 | 1284 | static void irq_domain_free_irqs_hierarchy(struct irq_domain *domain, |
36d72731 JL |
1285 | unsigned int irq_base, |
1286 | unsigned int nr_irqs) | |
1287 | { | |
0d12ec07 DD |
1288 | if (domain->ops->free) |
1289 | domain->ops->free(domain, irq_base, nr_irqs); | |
36d72731 JL |
1290 | } |
1291 | ||
6a6544e5 | 1292 | int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain, |
c466595c MZ |
1293 | unsigned int irq_base, |
1294 | unsigned int nr_irqs, void *arg) | |
36d72731 | 1295 | { |
6a6544e5 | 1296 | return domain->ops->alloc(domain, irq_base, nr_irqs, arg); |
36d72731 JL |
1297 | } |
1298 | ||
f8264e34 JL |
1299 | /** |
1300 | * __irq_domain_alloc_irqs - Allocate IRQs from domain | |
1301 | * @domain: domain to allocate from | |
08970ecf | 1302 | * @irq_base: allocate specified IRQ number if irq_base >= 0 |
f8264e34 JL |
1303 | * @nr_irqs: number of IRQs to allocate |
1304 | * @node: NUMA node id for memory allocation | |
1305 | * @arg: domain specific argument | |
1306 | * @realloc: IRQ descriptors have already been allocated if true | |
06ee6d57 | 1307 | * @affinity: Optional irq affinity mask for multiqueue devices |
f8264e34 JL |
1308 | * |
1309 | * Allocate IRQ numbers and initialized all data structures to support | |
1310 | * hierarchy IRQ domains. | |
1311 | * Parameter @realloc is mainly to support legacy IRQs. | |
1312 | * Returns error code or allocated IRQ number | |
1313 | * | |
1314 | * The whole process to setup an IRQ has been split into two steps. | |
1315 | * The first step, __irq_domain_alloc_irqs(), is to allocate IRQ | |
1316 | * descriptor and required hardware resources. The second step, | |
1317 | * irq_domain_activate_irq(), is to program hardwares with preallocated | |
1318 | * resources. In this way, it's easier to rollback when failing to | |
1319 | * allocate resources. | |
1320 | */ | |
1321 | int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, | |
1322 | unsigned int nr_irqs, int node, void *arg, | |
bec04037 | 1323 | bool realloc, const struct irq_affinity_desc *affinity) |
f8264e34 JL |
1324 | { |
1325 | int i, ret, virq; | |
1326 | ||
1327 | if (domain == NULL) { | |
1328 | domain = irq_default_domain; | |
1329 | if (WARN(!domain, "domain is NULL; cannot allocate IRQ\n")) | |
1330 | return -EINVAL; | |
1331 | } | |
1332 | ||
1333 | if (!domain->ops->alloc) { | |
1334 | pr_debug("domain->ops->alloc() is NULL\n"); | |
1335 | return -ENOSYS; | |
1336 | } | |
1337 | ||
1338 | if (realloc && irq_base >= 0) { | |
1339 | virq = irq_base; | |
1340 | } else { | |
06ee6d57 TG |
1341 | virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node, |
1342 | affinity); | |
f8264e34 JL |
1343 | if (virq < 0) { |
1344 | pr_debug("cannot allocate IRQ(base %d, count %d)\n", | |
1345 | irq_base, nr_irqs); | |
1346 | return virq; | |
1347 | } | |
1348 | } | |
1349 | ||
1350 | if (irq_domain_alloc_irq_data(domain, virq, nr_irqs)) { | |
1351 | pr_debug("cannot allocate memory for IRQ%d\n", virq); | |
1352 | ret = -ENOMEM; | |
1353 | goto out_free_desc; | |
1354 | } | |
1355 | ||
1356 | mutex_lock(&irq_domain_mutex); | |
6a6544e5 | 1357 | ret = irq_domain_alloc_irqs_hierarchy(domain, virq, nr_irqs, arg); |
f8264e34 JL |
1358 | if (ret < 0) { |
1359 | mutex_unlock(&irq_domain_mutex); | |
1360 | goto out_free_irq_data; | |
1361 | } | |
1362 | for (i = 0; i < nr_irqs; i++) | |
1363 | irq_domain_insert_irq(virq + i); | |
1364 | mutex_unlock(&irq_domain_mutex); | |
1365 | ||
1366 | return virq; | |
1367 | ||
1368 | out_free_irq_data: | |
1369 | irq_domain_free_irq_data(virq, nr_irqs); | |
1370 | out_free_desc: | |
1371 | irq_free_descs(virq, nr_irqs); | |
1372 | return ret; | |
1373 | } | |
1374 | ||
495c38d3 DD |
1375 | /* The irq_data was moved, fix the revmap to refer to the new location */ |
1376 | static void irq_domain_fix_revmap(struct irq_data *d) | |
1377 | { | |
d03cc2d8 | 1378 | void __rcu **slot; |
495c38d3 DD |
1379 | |
1380 | if (d->hwirq < d->domain->revmap_size) | |
1381 | return; /* Not using radix tree. */ | |
1382 | ||
1383 | /* Fix up the revmap. */ | |
f1d78358 | 1384 | mutex_lock(&d->domain->revmap_tree_mutex); |
495c38d3 DD |
1385 | slot = radix_tree_lookup_slot(&d->domain->revmap_tree, d->hwirq); |
1386 | if (slot) | |
1387 | radix_tree_replace_slot(&d->domain->revmap_tree, slot, d); | |
f1d78358 | 1388 | mutex_unlock(&d->domain->revmap_tree_mutex); |
495c38d3 DD |
1389 | } |
1390 | ||
1391 | /** | |
1392 | * irq_domain_push_irq() - Push a domain in to the top of a hierarchy. | |
1393 | * @domain: Domain to push. | |
1394 | * @virq: Irq to push the domain in to. | |
1395 | * @arg: Passed to the irq_domain_ops alloc() function. | |
1396 | * | |
1397 | * For an already existing irqdomain hierarchy, as might be obtained | |
1398 | * via a call to pci_enable_msix(), add an additional domain to the | |
1399 | * head of the processing chain. Must be called before request_irq() | |
1400 | * has been called. | |
1401 | */ | |
1402 | int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg) | |
1403 | { | |
1404 | struct irq_data *child_irq_data; | |
1405 | struct irq_data *root_irq_data = irq_get_irq_data(virq); | |
1406 | struct irq_desc *desc; | |
1407 | int rv = 0; | |
1408 | ||
1409 | /* | |
1410 | * Check that no action has been set, which indicates the virq | |
1411 | * is in a state where this function doesn't have to deal with | |
1412 | * races between interrupt handling and maintaining the | |
1413 | * hierarchy. This will catch gross misuse. Attempting to | |
1414 | * make the check race free would require holding locks across | |
1415 | * calls to struct irq_domain_ops->alloc(), which could lead | |
1416 | * to deadlock, so we just do a simple check before starting. | |
1417 | */ | |
1418 | desc = irq_to_desc(virq); | |
1419 | if (!desc) | |
1420 | return -EINVAL; | |
1421 | if (WARN_ON(desc->action)) | |
1422 | return -EBUSY; | |
1423 | ||
1424 | if (domain == NULL) | |
1425 | return -EINVAL; | |
1426 | ||
1427 | if (WARN_ON(!irq_domain_is_hierarchy(domain))) | |
1428 | return -EINVAL; | |
1429 | ||
20c4d49c | 1430 | if (!root_irq_data) |
495c38d3 DD |
1431 | return -EINVAL; |
1432 | ||
20c4d49c | 1433 | if (domain->parent != root_irq_data->domain) |
495c38d3 DD |
1434 | return -EINVAL; |
1435 | ||
1436 | child_irq_data = kzalloc_node(sizeof(*child_irq_data), GFP_KERNEL, | |
1437 | irq_data_get_node(root_irq_data)); | |
1438 | if (!child_irq_data) | |
1439 | return -ENOMEM; | |
1440 | ||
1441 | mutex_lock(&irq_domain_mutex); | |
1442 | ||
1443 | /* Copy the original irq_data. */ | |
1444 | *child_irq_data = *root_irq_data; | |
1445 | ||
1446 | /* | |
1447 | * Overwrite the root_irq_data, which is embedded in struct | |
1448 | * irq_desc, with values for this domain. | |
1449 | */ | |
1450 | root_irq_data->parent_data = child_irq_data; | |
1451 | root_irq_data->domain = domain; | |
1452 | root_irq_data->mask = 0; | |
1453 | root_irq_data->hwirq = 0; | |
1454 | root_irq_data->chip = NULL; | |
1455 | root_irq_data->chip_data = NULL; | |
1456 | ||
1457 | /* May (probably does) set hwirq, chip, etc. */ | |
1458 | rv = irq_domain_alloc_irqs_hierarchy(domain, virq, 1, arg); | |
1459 | if (rv) { | |
1460 | /* Restore the original irq_data. */ | |
1461 | *root_irq_data = *child_irq_data; | |
1462 | goto error; | |
1463 | } | |
1464 | ||
1465 | irq_domain_fix_revmap(child_irq_data); | |
1466 | irq_domain_set_mapping(domain, root_irq_data->hwirq, root_irq_data); | |
1467 | ||
1468 | error: | |
1469 | mutex_unlock(&irq_domain_mutex); | |
1470 | ||
1471 | return rv; | |
1472 | } | |
1473 | EXPORT_SYMBOL_GPL(irq_domain_push_irq); | |
1474 | ||
1475 | /** | |
1476 | * irq_domain_pop_irq() - Remove a domain from the top of a hierarchy. | |
1477 | * @domain: Domain to remove. | |
1478 | * @virq: Irq to remove the domain from. | |
1479 | * | |
1480 | * Undo the effects of a call to irq_domain_push_irq(). Must be | |
1481 | * called either before request_irq() or after free_irq(). | |
1482 | */ | |
1483 | int irq_domain_pop_irq(struct irq_domain *domain, int virq) | |
1484 | { | |
1485 | struct irq_data *root_irq_data = irq_get_irq_data(virq); | |
1486 | struct irq_data *child_irq_data; | |
1487 | struct irq_data *tmp_irq_data; | |
1488 | struct irq_desc *desc; | |
1489 | ||
1490 | /* | |
1491 | * Check that no action is set, which indicates the virq is in | |
1492 | * a state where this function doesn't have to deal with races | |
1493 | * between interrupt handling and maintaining the hierarchy. | |
1494 | * This will catch gross misuse. Attempting to make the check | |
1495 | * race free would require holding locks across calls to | |
1496 | * struct irq_domain_ops->free(), which could lead to | |
1497 | * deadlock, so we just do a simple check before starting. | |
1498 | */ | |
1499 | desc = irq_to_desc(virq); | |
1500 | if (!desc) | |
1501 | return -EINVAL; | |
1502 | if (WARN_ON(desc->action)) | |
1503 | return -EBUSY; | |
1504 | ||
1505 | if (domain == NULL) | |
1506 | return -EINVAL; | |
1507 | ||
1508 | if (!root_irq_data) | |
1509 | return -EINVAL; | |
1510 | ||
1511 | tmp_irq_data = irq_domain_get_irq_data(domain, virq); | |
1512 | ||
1513 | /* We can only "pop" if this domain is at the top of the list */ | |
1514 | if (WARN_ON(root_irq_data != tmp_irq_data)) | |
1515 | return -EINVAL; | |
1516 | ||
1517 | if (WARN_ON(root_irq_data->domain != domain)) | |
1518 | return -EINVAL; | |
1519 | ||
1520 | child_irq_data = root_irq_data->parent_data; | |
1521 | if (WARN_ON(!child_irq_data)) | |
1522 | return -EINVAL; | |
1523 | ||
1524 | mutex_lock(&irq_domain_mutex); | |
1525 | ||
1526 | root_irq_data->parent_data = NULL; | |
1527 | ||
1528 | irq_domain_clear_mapping(domain, root_irq_data->hwirq); | |
1529 | irq_domain_free_irqs_hierarchy(domain, virq, 1); | |
1530 | ||
1531 | /* Restore the original irq_data. */ | |
1532 | *root_irq_data = *child_irq_data; | |
1533 | ||
1534 | irq_domain_fix_revmap(root_irq_data); | |
1535 | ||
1536 | mutex_unlock(&irq_domain_mutex); | |
1537 | ||
1538 | kfree(child_irq_data); | |
1539 | ||
1540 | return 0; | |
1541 | } | |
1542 | EXPORT_SYMBOL_GPL(irq_domain_pop_irq); | |
1543 | ||
f8264e34 JL |
1544 | /** |
1545 | * irq_domain_free_irqs - Free IRQ number and associated data structures | |
1546 | * @virq: base IRQ number | |
1547 | * @nr_irqs: number of IRQs to free | |
1548 | */ | |
1549 | void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs) | |
1550 | { | |
1551 | struct irq_data *data = irq_get_irq_data(virq); | |
1552 | int i; | |
1553 | ||
1554 | if (WARN(!data || !data->domain || !data->domain->ops->free, | |
1555 | "NULL pointer, cannot free irq\n")) | |
1556 | return; | |
1557 | ||
1558 | mutex_lock(&irq_domain_mutex); | |
1559 | for (i = 0; i < nr_irqs; i++) | |
1560 | irq_domain_remove_irq(virq + i); | |
6a6544e5 | 1561 | irq_domain_free_irqs_hierarchy(data->domain, virq, nr_irqs); |
f8264e34 JL |
1562 | mutex_unlock(&irq_domain_mutex); |
1563 | ||
1564 | irq_domain_free_irq_data(virq, nr_irqs); | |
1565 | irq_free_descs(virq, nr_irqs); | |
1566 | } | |
1567 | ||
36d72731 JL |
1568 | /** |
1569 | * irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain | |
1570 | * @irq_base: Base IRQ number | |
1571 | * @nr_irqs: Number of IRQs to allocate | |
1572 | * @arg: Allocation data (arch/domain specific) | |
1573 | * | |
1574 | * Check whether the domain has been setup recursive. If not allocate | |
1575 | * through the parent domain. | |
1576 | */ | |
1577 | int irq_domain_alloc_irqs_parent(struct irq_domain *domain, | |
1578 | unsigned int irq_base, unsigned int nr_irqs, | |
1579 | void *arg) | |
1580 | { | |
6a6544e5 MZ |
1581 | if (!domain->parent) |
1582 | return -ENOSYS; | |
36d72731 | 1583 | |
6a6544e5 MZ |
1584 | return irq_domain_alloc_irqs_hierarchy(domain->parent, irq_base, |
1585 | nr_irqs, arg); | |
36d72731 | 1586 | } |
52b2a05f | 1587 | EXPORT_SYMBOL_GPL(irq_domain_alloc_irqs_parent); |
36d72731 JL |
1588 | |
1589 | /** | |
1590 | * irq_domain_free_irqs_parent - Free interrupts from parent domain | |
1591 | * @irq_base: Base IRQ number | |
1592 | * @nr_irqs: Number of IRQs to free | |
1593 | * | |
1594 | * Check whether the domain has been setup recursive. If not free | |
1595 | * through the parent domain. | |
1596 | */ | |
1597 | void irq_domain_free_irqs_parent(struct irq_domain *domain, | |
1598 | unsigned int irq_base, unsigned int nr_irqs) | |
1599 | { | |
6a6544e5 MZ |
1600 | if (!domain->parent) |
1601 | return; | |
1602 | ||
1603 | irq_domain_free_irqs_hierarchy(domain->parent, irq_base, nr_irqs); | |
36d72731 | 1604 | } |
52b2a05f | 1605 | EXPORT_SYMBOL_GPL(irq_domain_free_irqs_parent); |
36d72731 | 1606 | |
08d85f3e MZ |
1607 | static void __irq_domain_deactivate_irq(struct irq_data *irq_data) |
1608 | { | |
1609 | if (irq_data && irq_data->domain) { | |
1610 | struct irq_domain *domain = irq_data->domain; | |
1611 | ||
1612 | if (domain->ops->deactivate) | |
1613 | domain->ops->deactivate(domain, irq_data); | |
1614 | if (irq_data->parent_data) | |
1615 | __irq_domain_deactivate_irq(irq_data->parent_data); | |
1616 | } | |
1617 | } | |
1618 | ||
702cb0a0 | 1619 | static int __irq_domain_activate_irq(struct irq_data *irqd, bool reserve) |
bb9b428a TG |
1620 | { |
1621 | int ret = 0; | |
1622 | ||
1623 | if (irqd && irqd->domain) { | |
1624 | struct irq_domain *domain = irqd->domain; | |
1625 | ||
1626 | if (irqd->parent_data) | |
42e1cc2d | 1627 | ret = __irq_domain_activate_irq(irqd->parent_data, |
702cb0a0 | 1628 | reserve); |
bb9b428a | 1629 | if (!ret && domain->ops->activate) { |
702cb0a0 | 1630 | ret = domain->ops->activate(domain, irqd, reserve); |
bb9b428a TG |
1631 | /* Rollback in case of error */ |
1632 | if (ret && irqd->parent_data) | |
1633 | __irq_domain_deactivate_irq(irqd->parent_data); | |
1634 | } | |
1635 | } | |
1636 | return ret; | |
1637 | } | |
1638 | ||
f8264e34 JL |
1639 | /** |
1640 | * irq_domain_activate_irq - Call domain_ops->activate recursively to activate | |
1641 | * interrupt | |
702cb0a0 TG |
1642 | * @irq_data: Outermost irq_data associated with interrupt |
1643 | * @reserve: If set only reserve an interrupt vector instead of assigning one | |
f8264e34 JL |
1644 | * |
1645 | * This is the second step to call domain_ops->activate to program interrupt | |
1646 | * controllers, so the interrupt could actually get delivered. | |
1647 | */ | |
702cb0a0 | 1648 | int irq_domain_activate_irq(struct irq_data *irq_data, bool reserve) |
f8264e34 | 1649 | { |
bb9b428a TG |
1650 | int ret = 0; |
1651 | ||
1652 | if (!irqd_is_activated(irq_data)) | |
702cb0a0 | 1653 | ret = __irq_domain_activate_irq(irq_data, reserve); |
bb9b428a | 1654 | if (!ret) |
08d85f3e | 1655 | irqd_set_activated(irq_data); |
bb9b428a | 1656 | return ret; |
f8264e34 JL |
1657 | } |
1658 | ||
1659 | /** | |
1660 | * irq_domain_deactivate_irq - Call domain_ops->deactivate recursively to | |
1661 | * deactivate interrupt | |
1662 | * @irq_data: outermost irq_data associated with interrupt | |
1663 | * | |
1664 | * It calls domain_ops->deactivate to program interrupt controllers to disable | |
1665 | * interrupt delivery. | |
1666 | */ | |
1667 | void irq_domain_deactivate_irq(struct irq_data *irq_data) | |
1668 | { | |
08d85f3e MZ |
1669 | if (irqd_is_activated(irq_data)) { |
1670 | __irq_domain_deactivate_irq(irq_data); | |
1671 | irqd_clr_activated(irq_data); | |
f8264e34 JL |
1672 | } |
1673 | } | |
1674 | ||
1675 | static void irq_domain_check_hierarchy(struct irq_domain *domain) | |
1676 | { | |
1677 | /* Hierarchy irq_domains must implement callback alloc() */ | |
1678 | if (domain->ops->alloc) | |
1679 | domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY; | |
1680 | } | |
631a9639 EA |
1681 | |
1682 | /** | |
1683 | * irq_domain_hierarchical_is_msi_remap - Check if the domain or any | |
1684 | * parent has MSI remapping support | |
1685 | * @domain: domain pointer | |
1686 | */ | |
1687 | bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain) | |
1688 | { | |
1689 | for (; domain; domain = domain->parent) { | |
1690 | if (irq_domain_is_msi_remap(domain)) | |
1691 | return true; | |
1692 | } | |
1693 | return false; | |
1694 | } | |
f8264e34 JL |
1695 | #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */ |
1696 | /** | |
1697 | * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain | |
1698 | * @domain: domain to match | |
1699 | * @virq: IRQ number to get irq_data | |
1700 | */ | |
1701 | struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, | |
1702 | unsigned int virq) | |
1703 | { | |
1704 | struct irq_data *irq_data = irq_get_irq_data(virq); | |
1705 | ||
1706 | return (irq_data && irq_data->domain == domain) ? irq_data : NULL; | |
1707 | } | |
a4289dc2 | 1708 | EXPORT_SYMBOL_GPL(irq_domain_get_irq_data); |
f8264e34 | 1709 | |
5f22f5c6 SA |
1710 | /** |
1711 | * irq_domain_set_info - Set the complete data for a @virq in @domain | |
1712 | * @domain: Interrupt domain to match | |
1713 | * @virq: IRQ number | |
1714 | * @hwirq: The hardware interrupt number | |
1715 | * @chip: The associated interrupt chip | |
1716 | * @chip_data: The associated interrupt chip data | |
1717 | * @handler: The interrupt flow handler | |
1718 | * @handler_data: The interrupt flow handler data | |
1719 | * @handler_name: The interrupt handler name | |
1720 | */ | |
1721 | void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, | |
1722 | irq_hw_number_t hwirq, struct irq_chip *chip, | |
1723 | void *chip_data, irq_flow_handler_t handler, | |
1724 | void *handler_data, const char *handler_name) | |
1725 | { | |
1726 | irq_set_chip_and_handler_name(virq, chip, handler, handler_name); | |
1727 | irq_set_chip_data(virq, chip_data); | |
1728 | irq_set_handler_data(virq, handler_data); | |
1729 | } | |
1730 | ||
f8264e34 JL |
1731 | static void irq_domain_check_hierarchy(struct irq_domain *domain) |
1732 | { | |
1733 | } | |
1734 | #endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */ | |
087cdfb6 TG |
1735 | |
1736 | #ifdef CONFIG_GENERIC_IRQ_DEBUGFS | |
1737 | static struct dentry *domain_dir; | |
1738 | ||
1739 | static void | |
1740 | irq_domain_debug_show_one(struct seq_file *m, struct irq_domain *d, int ind) | |
1741 | { | |
1742 | seq_printf(m, "%*sname: %s\n", ind, "", d->name); | |
1743 | seq_printf(m, "%*ssize: %u\n", ind + 1, "", | |
1744 | d->revmap_size + d->revmap_direct_max_irq); | |
1745 | seq_printf(m, "%*smapped: %u\n", ind + 1, "", d->mapcount); | |
1746 | seq_printf(m, "%*sflags: 0x%08x\n", ind +1 , "", d->flags); | |
c3e7239a TG |
1747 | if (d->ops && d->ops->debug_show) |
1748 | d->ops->debug_show(m, d, NULL, ind + 1); | |
087cdfb6 TG |
1749 | #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY |
1750 | if (!d->parent) | |
1751 | return; | |
1752 | seq_printf(m, "%*sparent: %s\n", ind + 1, "", d->parent->name); | |
1753 | irq_domain_debug_show_one(m, d->parent, ind + 4); | |
1754 | #endif | |
1755 | } | |
1756 | ||
1757 | static int irq_domain_debug_show(struct seq_file *m, void *p) | |
1758 | { | |
1759 | struct irq_domain *d = m->private; | |
1760 | ||
1761 | /* Default domain? Might be NULL */ | |
1762 | if (!d) { | |
1763 | if (!irq_default_domain) | |
1764 | return 0; | |
1765 | d = irq_default_domain; | |
1766 | } | |
1767 | irq_domain_debug_show_one(m, d, 0); | |
1768 | return 0; | |
1769 | } | |
0b24a0bb | 1770 | DEFINE_SHOW_ATTRIBUTE(irq_domain_debug); |
087cdfb6 TG |
1771 | |
1772 | static void debugfs_add_domain_dir(struct irq_domain *d) | |
1773 | { | |
1774 | if (!d->name || !domain_dir || d->debugfs_file) | |
1775 | return; | |
1776 | d->debugfs_file = debugfs_create_file(d->name, 0444, domain_dir, d, | |
0b24a0bb | 1777 | &irq_domain_debug_fops); |
087cdfb6 TG |
1778 | } |
1779 | ||
1780 | static void debugfs_remove_domain_dir(struct irq_domain *d) | |
1781 | { | |
f610c9d6 | 1782 | debugfs_remove(d->debugfs_file); |
513145ea | 1783 | d->debugfs_file = NULL; |
087cdfb6 TG |
1784 | } |
1785 | ||
1786 | void __init irq_domain_debugfs_init(struct dentry *root) | |
1787 | { | |
1788 | struct irq_domain *d; | |
1789 | ||
1790 | domain_dir = debugfs_create_dir("domains", root); | |
087cdfb6 | 1791 | |
0b24a0bb AS |
1792 | debugfs_create_file("default", 0444, domain_dir, NULL, |
1793 | &irq_domain_debug_fops); | |
087cdfb6 TG |
1794 | mutex_lock(&irq_domain_mutex); |
1795 | list_for_each_entry(d, &irq_domain_list, link) | |
1796 | debugfs_add_domain_dir(d); | |
1797 | mutex_unlock(&irq_domain_mutex); | |
1798 | } | |
1799 | #endif |