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