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Commit | Line | Data |
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54a90588 PM |
1 | #define pr_fmt(fmt) "irq: " fmt |
2 | ||
cc79ca69 GL |
3 | #include <linux/debugfs.h> |
4 | #include <linux/hardirq.h> | |
5 | #include <linux/interrupt.h> | |
08a543ad | 6 | #include <linux/irq.h> |
cc79ca69 | 7 | #include <linux/irqdesc.h> |
08a543ad GL |
8 | #include <linux/irqdomain.h> |
9 | #include <linux/module.h> | |
10 | #include <linux/mutex.h> | |
11 | #include <linux/of.h> | |
7e713301 | 12 | #include <linux/of_address.h> |
64be38ab | 13 | #include <linux/of_irq.h> |
5ca4db61 | 14 | #include <linux/topology.h> |
cc79ca69 | 15 | #include <linux/seq_file.h> |
7e713301 | 16 | #include <linux/slab.h> |
cc79ca69 GL |
17 | #include <linux/smp.h> |
18 | #include <linux/fs.h> | |
08a543ad GL |
19 | |
20 | static LIST_HEAD(irq_domain_list); | |
21 | static DEFINE_MUTEX(irq_domain_mutex); | |
22 | ||
cc79ca69 | 23 | static DEFINE_MUTEX(revmap_trees_mutex); |
68700650 | 24 | static struct irq_domain *irq_default_domain; |
cc79ca69 | 25 | |
cc79ca69 | 26 | /** |
fa40f377 | 27 | * __irq_domain_add() - Allocate a new irq_domain data structure |
cc79ca69 | 28 | * @of_node: optional device-tree node of the interrupt controller |
fa40f377 | 29 | * @size: Size of linear map; 0 for radix mapping only |
a257954b | 30 | * @hwirq_max: Maximum number of interrupts supported by controller |
fa40f377 GL |
31 | * @direct_max: Maximum value of direct maps; Use ~0 for no limit; 0 for no |
32 | * direct mapping | |
68700650 | 33 | * @ops: map/unmap domain callbacks |
a8db8cf0 | 34 | * @host_data: Controller private data pointer |
cc79ca69 | 35 | * |
a257954b JL |
36 | * Allocates and initialize and irq_domain structure. |
37 | * Returns pointer to IRQ domain, or NULL on failure. | |
cc79ca69 | 38 | */ |
ddaf144c GL |
39 | struct irq_domain *__irq_domain_add(struct device_node *of_node, int size, |
40 | irq_hw_number_t hwirq_max, int direct_max, | |
fa40f377 GL |
41 | const struct irq_domain_ops *ops, |
42 | void *host_data) | |
cc79ca69 | 43 | { |
a8db8cf0 | 44 | struct irq_domain *domain; |
cc79ca69 | 45 | |
cef5075c GL |
46 | domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size), |
47 | GFP_KERNEL, of_node_to_nid(of_node)); | |
a8db8cf0 | 48 | if (WARN_ON(!domain)) |
cc79ca69 GL |
49 | return NULL; |
50 | ||
51 | /* Fill structure */ | |
1aa0dd94 | 52 | INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL); |
68700650 | 53 | domain->ops = ops; |
a8db8cf0 | 54 | domain->host_data = host_data; |
68700650 | 55 | domain->of_node = of_node_get(of_node); |
ddaf144c | 56 | domain->hwirq_max = hwirq_max; |
1aa0dd94 | 57 | domain->revmap_size = size; |
fa40f377 | 58 | domain->revmap_direct_max_irq = direct_max; |
cc79ca69 | 59 | |
a8db8cf0 GL |
60 | mutex_lock(&irq_domain_mutex); |
61 | list_add(&domain->link, &irq_domain_list); | |
62 | mutex_unlock(&irq_domain_mutex); | |
fa40f377 | 63 | |
1aa0dd94 | 64 | pr_debug("Added domain %s\n", domain->name); |
fa40f377 | 65 | return domain; |
a8db8cf0 | 66 | } |
fa40f377 | 67 | EXPORT_SYMBOL_GPL(__irq_domain_add); |
a8db8cf0 | 68 | |
58ee99ad PM |
69 | /** |
70 | * irq_domain_remove() - Remove an irq domain. | |
71 | * @domain: domain to remove | |
72 | * | |
73 | * This routine is used to remove an irq domain. The caller must ensure | |
74 | * that all mappings within the domain have been disposed of prior to | |
75 | * use, depending on the revmap type. | |
76 | */ | |
77 | void irq_domain_remove(struct irq_domain *domain) | |
78 | { | |
79 | mutex_lock(&irq_domain_mutex); | |
80 | ||
cef5075c GL |
81 | /* |
82 | * radix_tree_delete() takes care of destroying the root | |
83 | * node when all entries are removed. Shout if there are | |
84 | * any mappings left. | |
85 | */ | |
1aa0dd94 | 86 | WARN_ON(domain->revmap_tree.height); |
58ee99ad PM |
87 | |
88 | list_del(&domain->link); | |
89 | ||
90 | /* | |
91 | * If the going away domain is the default one, reset it. | |
92 | */ | |
93 | if (unlikely(irq_default_domain == domain)) | |
94 | irq_set_default_host(NULL); | |
95 | ||
96 | mutex_unlock(&irq_domain_mutex); | |
97 | ||
1aa0dd94 | 98 | pr_debug("Removed domain %s\n", domain->name); |
58ee99ad | 99 | |
fa40f377 GL |
100 | of_node_put(domain->of_node); |
101 | kfree(domain); | |
58ee99ad | 102 | } |
ecd84eb2 | 103 | EXPORT_SYMBOL_GPL(irq_domain_remove); |
58ee99ad | 104 | |
781d0f46 | 105 | /** |
fa40f377 | 106 | * irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs |
781d0f46 MB |
107 | * @of_node: pointer to interrupt controller's device tree node. |
108 | * @size: total number of irqs in mapping | |
94a63da0 | 109 | * @first_irq: first number of irq block assigned to the domain, |
fa40f377 GL |
110 | * pass zero to assign irqs on-the-fly. If first_irq is non-zero, then |
111 | * pre-map all of the irqs in the domain to virqs starting at first_irq. | |
781d0f46 MB |
112 | * @ops: map/unmap domain callbacks |
113 | * @host_data: Controller private data pointer | |
114 | * | |
fa40f377 GL |
115 | * Allocates an irq_domain, and optionally if first_irq is positive then also |
116 | * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq. | |
781d0f46 MB |
117 | * |
118 | * This is intended to implement the expected behaviour for most | |
fa40f377 GL |
119 | * interrupt controllers. If device tree is used, then first_irq will be 0 and |
120 | * irqs get mapped dynamically on the fly. However, if the controller requires | |
121 | * static virq assignments (non-DT boot) then it will set that up correctly. | |
781d0f46 MB |
122 | */ |
123 | struct irq_domain *irq_domain_add_simple(struct device_node *of_node, | |
124 | unsigned int size, | |
125 | unsigned int first_irq, | |
126 | const struct irq_domain_ops *ops, | |
127 | void *host_data) | |
128 | { | |
fa40f377 GL |
129 | struct irq_domain *domain; |
130 | ||
ddaf144c | 131 | domain = __irq_domain_add(of_node, size, size, 0, ops, host_data); |
fa40f377 GL |
132 | if (!domain) |
133 | return NULL; | |
2854d167 | 134 | |
fa40f377 | 135 | if (first_irq > 0) { |
2854d167 | 136 | if (IS_ENABLED(CONFIG_SPARSE_IRQ)) { |
fa40f377 GL |
137 | /* attempt to allocated irq_descs */ |
138 | int rc = irq_alloc_descs(first_irq, first_irq, size, | |
139 | of_node_to_nid(of_node)); | |
140 | if (rc < 0) | |
d202b7b9 LW |
141 | pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n", |
142 | first_irq); | |
fa40f377 | 143 | } |
ddaf144c | 144 | irq_domain_associate_many(domain, first_irq, 0, size); |
2854d167 LW |
145 | } |
146 | ||
fa40f377 | 147 | return domain; |
781d0f46 | 148 | } |
346dbb79 | 149 | EXPORT_SYMBOL_GPL(irq_domain_add_simple); |
781d0f46 | 150 | |
a8db8cf0 GL |
151 | /** |
152 | * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain. | |
153 | * @of_node: pointer to interrupt controller's device tree node. | |
1bc04f2c GL |
154 | * @size: total number of irqs in legacy mapping |
155 | * @first_irq: first number of irq block assigned to the domain | |
156 | * @first_hwirq: first hwirq number to use for the translation. Should normally | |
157 | * be '0', but a positive integer can be used if the effective | |
158 | * hwirqs numbering does not begin at zero. | |
a8db8cf0 GL |
159 | * @ops: map/unmap domain callbacks |
160 | * @host_data: Controller private data pointer | |
161 | * | |
162 | * Note: the map() callback will be called before this function returns | |
163 | * for all legacy interrupts except 0 (which is always the invalid irq for | |
164 | * a legacy controller). | |
165 | */ | |
166 | struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, | |
1bc04f2c GL |
167 | unsigned int size, |
168 | unsigned int first_irq, | |
169 | irq_hw_number_t first_hwirq, | |
a18dc81b | 170 | const struct irq_domain_ops *ops, |
a8db8cf0 GL |
171 | void *host_data) |
172 | { | |
1bc04f2c | 173 | struct irq_domain *domain; |
a8db8cf0 | 174 | |
ddaf144c GL |
175 | domain = __irq_domain_add(of_node, first_hwirq + size, |
176 | first_hwirq + size, 0, ops, host_data); | |
a8db8cf0 GL |
177 | if (!domain) |
178 | return NULL; | |
179 | ||
ddaf144c | 180 | irq_domain_associate_many(domain, first_irq, first_hwirq, size); |
1bc04f2c | 181 | |
a8db8cf0 GL |
182 | return domain; |
183 | } | |
ecd84eb2 | 184 | EXPORT_SYMBOL_GPL(irq_domain_add_legacy); |
a8db8cf0 | 185 | |
cc79ca69 GL |
186 | /** |
187 | * irq_find_host() - Locates a domain for a given device node | |
188 | * @node: device-tree node of the interrupt controller | |
189 | */ | |
190 | struct irq_domain *irq_find_host(struct device_node *node) | |
191 | { | |
192 | struct irq_domain *h, *found = NULL; | |
a18dc81b | 193 | int rc; |
cc79ca69 GL |
194 | |
195 | /* We might want to match the legacy controller last since | |
196 | * it might potentially be set to match all interrupts in | |
197 | * the absence of a device node. This isn't a problem so far | |
198 | * yet though... | |
199 | */ | |
200 | mutex_lock(&irq_domain_mutex); | |
a18dc81b GL |
201 | list_for_each_entry(h, &irq_domain_list, link) { |
202 | if (h->ops->match) | |
203 | rc = h->ops->match(h, node); | |
204 | else | |
205 | rc = (h->of_node != NULL) && (h->of_node == node); | |
206 | ||
207 | if (rc) { | |
cc79ca69 GL |
208 | found = h; |
209 | break; | |
210 | } | |
a18dc81b | 211 | } |
cc79ca69 GL |
212 | mutex_unlock(&irq_domain_mutex); |
213 | return found; | |
214 | } | |
215 | EXPORT_SYMBOL_GPL(irq_find_host); | |
216 | ||
217 | /** | |
218 | * irq_set_default_host() - Set a "default" irq domain | |
68700650 | 219 | * @domain: default domain pointer |
cc79ca69 GL |
220 | * |
221 | * For convenience, it's possible to set a "default" domain that will be used | |
222 | * whenever NULL is passed to irq_create_mapping(). It makes life easier for | |
223 | * platforms that want to manipulate a few hard coded interrupt numbers that | |
224 | * aren't properly represented in the device-tree. | |
225 | */ | |
68700650 | 226 | void irq_set_default_host(struct irq_domain *domain) |
cc79ca69 | 227 | { |
54a90588 | 228 | pr_debug("Default domain set to @0x%p\n", domain); |
cc79ca69 | 229 | |
68700650 | 230 | irq_default_domain = domain; |
cc79ca69 | 231 | } |
ecd84eb2 | 232 | EXPORT_SYMBOL_GPL(irq_set_default_host); |
cc79ca69 | 233 | |
ddaf144c | 234 | static void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq) |
913af207 | 235 | { |
ddaf144c GL |
236 | struct irq_data *irq_data = irq_get_irq_data(irq); |
237 | irq_hw_number_t hwirq; | |
913af207 | 238 | |
ddaf144c GL |
239 | if (WARN(!irq_data || irq_data->domain != domain, |
240 | "virq%i doesn't exist; cannot disassociate\n", irq)) | |
241 | return; | |
913af207 | 242 | |
ddaf144c GL |
243 | hwirq = irq_data->hwirq; |
244 | irq_set_status_flags(irq, IRQ_NOREQUEST); | |
913af207 | 245 | |
ddaf144c GL |
246 | /* remove chip and handler */ |
247 | irq_set_chip_and_handler(irq, NULL, NULL); | |
913af207 | 248 | |
ddaf144c GL |
249 | /* Make sure it's completed */ |
250 | synchronize_irq(irq); | |
913af207 | 251 | |
ddaf144c GL |
252 | /* Tell the PIC about it */ |
253 | if (domain->ops->unmap) | |
254 | domain->ops->unmap(domain, irq); | |
255 | smp_mb(); | |
913af207 | 256 | |
ddaf144c GL |
257 | irq_data->domain = NULL; |
258 | irq_data->hwirq = 0; | |
913af207 | 259 | |
ddaf144c GL |
260 | /* Clear reverse map for this hwirq */ |
261 | if (hwirq < domain->revmap_size) { | |
262 | domain->linear_revmap[hwirq] = 0; | |
263 | } else { | |
264 | mutex_lock(&revmap_trees_mutex); | |
265 | radix_tree_delete(&domain->revmap_tree, hwirq); | |
266 | mutex_unlock(&revmap_trees_mutex); | |
913af207 GL |
267 | } |
268 | } | |
269 | ||
ddaf144c GL |
270 | int irq_domain_associate(struct irq_domain *domain, unsigned int virq, |
271 | irq_hw_number_t hwirq) | |
cc79ca69 | 272 | { |
ddaf144c GL |
273 | struct irq_data *irq_data = irq_get_irq_data(virq); |
274 | int ret; | |
cc79ca69 | 275 | |
ddaf144c GL |
276 | if (WARN(hwirq >= domain->hwirq_max, |
277 | "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name)) | |
278 | return -EINVAL; | |
279 | if (WARN(!irq_data, "error: virq%i is not allocated", virq)) | |
280 | return -EINVAL; | |
281 | if (WARN(irq_data->domain, "error: virq%i is already associated", virq)) | |
282 | return -EINVAL; | |
cc79ca69 | 283 | |
ddaf144c GL |
284 | mutex_lock(&irq_domain_mutex); |
285 | irq_data->hwirq = hwirq; | |
286 | irq_data->domain = domain; | |
287 | if (domain->ops->map) { | |
288 | ret = domain->ops->map(domain, virq, hwirq); | |
289 | if (ret != 0) { | |
290 | /* | |
291 | * If map() returns -EPERM, this interrupt is protected | |
292 | * by the firmware or some other service and shall not | |
293 | * be mapped. Don't bother telling the user about it. | |
294 | */ | |
295 | if (ret != -EPERM) { | |
296 | pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n", | |
297 | domain->name, hwirq, virq, ret); | |
f5a1ad05 | 298 | } |
ddaf144c GL |
299 | irq_data->domain = NULL; |
300 | irq_data->hwirq = 0; | |
301 | mutex_unlock(&irq_domain_mutex); | |
302 | return ret; | |
98aa468e GL |
303 | } |
304 | ||
ddaf144c GL |
305 | /* If not already assigned, give the domain the chip's name */ |
306 | if (!domain->name && irq_data->chip) | |
307 | domain->name = irq_data->chip->name; | |
308 | } | |
2a71a1a9 | 309 | |
ddaf144c GL |
310 | if (hwirq < domain->revmap_size) { |
311 | domain->linear_revmap[hwirq] = virq; | |
312 | } else { | |
313 | mutex_lock(&revmap_trees_mutex); | |
314 | radix_tree_insert(&domain->revmap_tree, hwirq, irq_data); | |
315 | mutex_unlock(&revmap_trees_mutex); | |
98aa468e | 316 | } |
ddaf144c GL |
317 | mutex_unlock(&irq_domain_mutex); |
318 | ||
319 | irq_clear_status_flags(virq, IRQ_NOREQUEST); | |
cc79ca69 GL |
320 | |
321 | return 0; | |
322 | } | |
ddaf144c | 323 | EXPORT_SYMBOL_GPL(irq_domain_associate); |
98aa468e | 324 | |
ddaf144c GL |
325 | void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base, |
326 | irq_hw_number_t hwirq_base, int count) | |
327 | { | |
328 | int i; | |
329 | ||
330 | pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__, | |
331 | of_node_full_name(domain->of_node), irq_base, (int)hwirq_base, count); | |
332 | ||
333 | for (i = 0; i < count; i++) { | |
334 | irq_domain_associate(domain, irq_base + i, hwirq_base + i); | |
335 | } | |
cc79ca69 | 336 | } |
98aa468e | 337 | EXPORT_SYMBOL_GPL(irq_domain_associate_many); |
cc79ca69 GL |
338 | |
339 | /** | |
340 | * irq_create_direct_mapping() - Allocate an irq for direct mapping | |
68700650 | 341 | * @domain: domain to allocate the irq for or NULL for default domain |
cc79ca69 GL |
342 | * |
343 | * This routine is used for irq controllers which can choose the hardware | |
344 | * interrupt numbers they generate. In such a case it's simplest to use | |
1aa0dd94 GL |
345 | * the linux irq as the hardware interrupt number. It still uses the linear |
346 | * or radix tree to store the mapping, but the irq controller can optimize | |
347 | * the revmap path by using the hwirq directly. | |
cc79ca69 | 348 | */ |
68700650 | 349 | unsigned int irq_create_direct_mapping(struct irq_domain *domain) |
cc79ca69 GL |
350 | { |
351 | unsigned int virq; | |
352 | ||
68700650 GL |
353 | if (domain == NULL) |
354 | domain = irq_default_domain; | |
cc79ca69 | 355 | |
5ca4db61 | 356 | virq = irq_alloc_desc_from(1, of_node_to_nid(domain->of_node)); |
03848373 | 357 | if (!virq) { |
54a90588 | 358 | pr_debug("create_direct virq allocation failed\n"); |
03848373 | 359 | return 0; |
cc79ca69 | 360 | } |
1aa0dd94 | 361 | if (virq >= domain->revmap_direct_max_irq) { |
cc79ca69 | 362 | pr_err("ERROR: no free irqs available below %i maximum\n", |
1aa0dd94 | 363 | domain->revmap_direct_max_irq); |
cc79ca69 GL |
364 | irq_free_desc(virq); |
365 | return 0; | |
366 | } | |
54a90588 | 367 | pr_debug("create_direct obtained virq %d\n", virq); |
cc79ca69 | 368 | |
98aa468e | 369 | if (irq_domain_associate(domain, virq, virq)) { |
cc79ca69 | 370 | irq_free_desc(virq); |
03848373 | 371 | return 0; |
cc79ca69 GL |
372 | } |
373 | ||
374 | return virq; | |
375 | } | |
ecd84eb2 | 376 | EXPORT_SYMBOL_GPL(irq_create_direct_mapping); |
cc79ca69 GL |
377 | |
378 | /** | |
379 | * irq_create_mapping() - Map a hardware interrupt into linux irq space | |
68700650 GL |
380 | * @domain: domain owning this hardware interrupt or NULL for default domain |
381 | * @hwirq: hardware irq number in that domain space | |
cc79ca69 GL |
382 | * |
383 | * Only one mapping per hardware interrupt is permitted. Returns a linux | |
384 | * irq number. | |
385 | * If the sense/trigger is to be specified, set_irq_type() should be called | |
386 | * on the number returned from that call. | |
387 | */ | |
68700650 | 388 | unsigned int irq_create_mapping(struct irq_domain *domain, |
cc79ca69 GL |
389 | irq_hw_number_t hwirq) |
390 | { | |
5b7526e3 DD |
391 | unsigned int hint; |
392 | int virq; | |
cc79ca69 | 393 | |
54a90588 | 394 | pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq); |
cc79ca69 | 395 | |
68700650 GL |
396 | /* Look for default domain if nececssary */ |
397 | if (domain == NULL) | |
398 | domain = irq_default_domain; | |
399 | if (domain == NULL) { | |
798f0fd1 | 400 | WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq); |
03848373 | 401 | return 0; |
cc79ca69 | 402 | } |
54a90588 | 403 | pr_debug("-> using domain @%p\n", domain); |
cc79ca69 GL |
404 | |
405 | /* Check if mapping already exists */ | |
68700650 | 406 | virq = irq_find_mapping(domain, hwirq); |
03848373 | 407 | if (virq) { |
54a90588 | 408 | pr_debug("-> existing mapping on virq %d\n", virq); |
cc79ca69 GL |
409 | return virq; |
410 | } | |
411 | ||
1bc04f2c | 412 | /* Allocate a virtual interrupt number */ |
6fa6c8e2 | 413 | hint = hwirq % nr_irqs; |
1bc04f2c GL |
414 | if (hint == 0) |
415 | hint++; | |
5ca4db61 | 416 | virq = irq_alloc_desc_from(hint, of_node_to_nid(domain->of_node)); |
5b7526e3 | 417 | if (virq <= 0) |
5ca4db61 | 418 | virq = irq_alloc_desc_from(1, of_node_to_nid(domain->of_node)); |
5b7526e3 | 419 | if (virq <= 0) { |
54a90588 | 420 | pr_debug("-> virq allocation failed\n"); |
1bc04f2c | 421 | return 0; |
cc79ca69 GL |
422 | } |
423 | ||
98aa468e | 424 | if (irq_domain_associate(domain, virq, hwirq)) { |
73255704 | 425 | irq_free_desc(virq); |
03848373 | 426 | return 0; |
cc79ca69 GL |
427 | } |
428 | ||
54a90588 | 429 | pr_debug("irq %lu on domain %s mapped to virtual irq %u\n", |
efd68e72 | 430 | hwirq, of_node_full_name(domain->of_node), virq); |
cc79ca69 GL |
431 | |
432 | return virq; | |
433 | } | |
434 | EXPORT_SYMBOL_GPL(irq_create_mapping); | |
435 | ||
98aa468e GL |
436 | /** |
437 | * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs | |
438 | * @domain: domain owning the interrupt range | |
439 | * @irq_base: beginning of linux IRQ range | |
440 | * @hwirq_base: beginning of hardware IRQ range | |
441 | * @count: Number of interrupts to map | |
442 | * | |
443 | * This routine is used for allocating and mapping a range of hardware | |
444 | * irqs to linux irqs where the linux irq numbers are at pre-defined | |
445 | * locations. For use by controllers that already have static mappings | |
446 | * to insert in to the domain. | |
447 | * | |
448 | * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time | |
449 | * domain insertion. | |
450 | * | |
451 | * 0 is returned upon success, while any failure to establish a static | |
452 | * mapping is treated as an error. | |
453 | */ | |
454 | int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base, | |
455 | irq_hw_number_t hwirq_base, int count) | |
456 | { | |
457 | int ret; | |
458 | ||
459 | ret = irq_alloc_descs(irq_base, irq_base, count, | |
460 | of_node_to_nid(domain->of_node)); | |
461 | if (unlikely(ret < 0)) | |
462 | return ret; | |
463 | ||
ddaf144c | 464 | irq_domain_associate_many(domain, irq_base, hwirq_base, count); |
98aa468e GL |
465 | return 0; |
466 | } | |
467 | EXPORT_SYMBOL_GPL(irq_create_strict_mappings); | |
468 | ||
e6d30ab1 | 469 | unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data) |
cc79ca69 | 470 | { |
68700650 | 471 | struct irq_domain *domain; |
cc79ca69 GL |
472 | irq_hw_number_t hwirq; |
473 | unsigned int type = IRQ_TYPE_NONE; | |
474 | unsigned int virq; | |
475 | ||
e6d30ab1 | 476 | domain = irq_data->np ? irq_find_host(irq_data->np) : irq_default_domain; |
68700650 | 477 | if (!domain) { |
798f0fd1 | 478 | pr_warn("no irq domain found for %s !\n", |
e6d30ab1 | 479 | of_node_full_name(irq_data->np)); |
03848373 | 480 | return 0; |
cc79ca69 GL |
481 | } |
482 | ||
68700650 GL |
483 | /* If domain has no translation, then we assume interrupt line */ |
484 | if (domain->ops->xlate == NULL) | |
e6d30ab1 | 485 | hwirq = irq_data->args[0]; |
cc79ca69 | 486 | else { |
e6d30ab1 GL |
487 | if (domain->ops->xlate(domain, irq_data->np, irq_data->args, |
488 | irq_data->args_count, &hwirq, &type)) | |
03848373 | 489 | return 0; |
cc79ca69 GL |
490 | } |
491 | ||
492 | /* Create mapping */ | |
68700650 | 493 | virq = irq_create_mapping(domain, hwirq); |
03848373 | 494 | if (!virq) |
cc79ca69 GL |
495 | return virq; |
496 | ||
497 | /* Set type if specified and different than the current one */ | |
498 | if (type != IRQ_TYPE_NONE && | |
fbab62c5 | 499 | type != irq_get_trigger_type(virq)) |
cc79ca69 GL |
500 | irq_set_irq_type(virq, type); |
501 | return virq; | |
502 | } | |
503 | EXPORT_SYMBOL_GPL(irq_create_of_mapping); | |
504 | ||
505 | /** | |
506 | * irq_dispose_mapping() - Unmap an interrupt | |
507 | * @virq: linux irq number of the interrupt to unmap | |
508 | */ | |
509 | void irq_dispose_mapping(unsigned int virq) | |
510 | { | |
511 | struct irq_data *irq_data = irq_get_irq_data(virq); | |
68700650 | 512 | struct irq_domain *domain; |
cc79ca69 | 513 | |
03848373 | 514 | if (!virq || !irq_data) |
cc79ca69 GL |
515 | return; |
516 | ||
68700650 GL |
517 | domain = irq_data->domain; |
518 | if (WARN_ON(domain == NULL)) | |
cc79ca69 GL |
519 | return; |
520 | ||
ddaf144c | 521 | irq_domain_disassociate(domain, virq); |
cc79ca69 GL |
522 | irq_free_desc(virq); |
523 | } | |
524 | EXPORT_SYMBOL_GPL(irq_dispose_mapping); | |
525 | ||
526 | /** | |
527 | * irq_find_mapping() - Find a linux irq from an hw irq number. | |
68700650 GL |
528 | * @domain: domain owning this hardware interrupt |
529 | * @hwirq: hardware irq number in that domain space | |
cc79ca69 | 530 | */ |
68700650 | 531 | unsigned int irq_find_mapping(struct irq_domain *domain, |
cc79ca69 GL |
532 | irq_hw_number_t hwirq) |
533 | { | |
4c0946c4 | 534 | struct irq_data *data; |
cc79ca69 | 535 | |
68700650 GL |
536 | /* Look for default domain if nececssary */ |
537 | if (domain == NULL) | |
538 | domain = irq_default_domain; | |
539 | if (domain == NULL) | |
03848373 | 540 | return 0; |
cc79ca69 | 541 | |
1aa0dd94 | 542 | if (hwirq < domain->revmap_direct_max_irq) { |
4c0946c4 | 543 | data = irq_get_irq_data(hwirq); |
68700650 | 544 | if (data && (data->domain == domain) && (data->hwirq == hwirq)) |
4c0946c4 | 545 | return hwirq; |
4c0946c4 GL |
546 | } |
547 | ||
d3dcb436 GL |
548 | /* Check if the hwirq is in the linear revmap. */ |
549 | if (hwirq < domain->revmap_size) | |
550 | return domain->linear_revmap[hwirq]; | |
cc79ca69 | 551 | |
d3dcb436 GL |
552 | rcu_read_lock(); |
553 | data = radix_tree_lookup(&domain->revmap_tree, hwirq); | |
554 | rcu_read_unlock(); | |
555 | return data ? data->irq : 0; | |
cc79ca69 | 556 | } |
cc79ca69 | 557 | EXPORT_SYMBOL_GPL(irq_find_mapping); |
cc79ca69 | 558 | |
092b2fb0 | 559 | #ifdef CONFIG_IRQ_DOMAIN_DEBUG |
cc79ca69 GL |
560 | static int virq_debug_show(struct seq_file *m, void *private) |
561 | { | |
562 | unsigned long flags; | |
563 | struct irq_desc *desc; | |
1400ea86 GL |
564 | struct irq_domain *domain; |
565 | struct radix_tree_iter iter; | |
566 | void *data, **slot; | |
cc79ca69 GL |
567 | int i; |
568 | ||
1400ea86 GL |
569 | seq_printf(m, " %-16s %-6s %-10s %-10s %s\n", |
570 | "name", "mapped", "linear-max", "direct-max", "devtree-node"); | |
571 | mutex_lock(&irq_domain_mutex); | |
572 | list_for_each_entry(domain, &irq_domain_list, link) { | |
573 | int count = 0; | |
574 | radix_tree_for_each_slot(slot, &domain->revmap_tree, &iter, 0) | |
575 | count++; | |
576 | seq_printf(m, "%c%-16s %6u %10u %10u %s\n", | |
577 | domain == irq_default_domain ? '*' : ' ', domain->name, | |
578 | domain->revmap_size + count, domain->revmap_size, | |
579 | domain->revmap_direct_max_irq, | |
580 | domain->of_node ? of_node_full_name(domain->of_node) : ""); | |
581 | } | |
582 | mutex_unlock(&irq_domain_mutex); | |
583 | ||
584 | seq_printf(m, "%-5s %-7s %-15s %-*s %6s %-14s %s\n", "irq", "hwirq", | |
5269a9ab | 585 | "chip name", (int)(2 * sizeof(void *) + 2), "chip data", |
1400ea86 | 586 | "active", "type", "domain"); |
cc79ca69 GL |
587 | |
588 | for (i = 1; i < nr_irqs; i++) { | |
589 | desc = irq_to_desc(i); | |
590 | if (!desc) | |
591 | continue; | |
592 | ||
593 | raw_spin_lock_irqsave(&desc->lock, flags); | |
1400ea86 | 594 | domain = desc->irq_data.domain; |
cc79ca69 | 595 | |
1400ea86 | 596 | if (domain) { |
cc79ca69 | 597 | struct irq_chip *chip; |
1400ea86 GL |
598 | int hwirq = desc->irq_data.hwirq; |
599 | bool direct; | |
cc79ca69 GL |
600 | |
601 | seq_printf(m, "%5d ", i); | |
1400ea86 | 602 | seq_printf(m, "0x%05x ", hwirq); |
cc79ca69 GL |
603 | |
604 | chip = irq_desc_get_chip(desc); | |
0bb4afb4 | 605 | seq_printf(m, "%-15s ", (chip && chip->name) ? chip->name : "none"); |
cc79ca69 GL |
606 | |
607 | data = irq_desc_get_chip_data(desc); | |
15e06bf6 | 608 | seq_printf(m, data ? "0x%p " : " %p ", data); |
cc79ca69 | 609 | |
1400ea86 GL |
610 | seq_printf(m, " %c ", (desc->action && desc->action->handler) ? '*' : ' '); |
611 | direct = (i == hwirq) && (i < domain->revmap_direct_max_irq); | |
612 | seq_printf(m, "%6s%-8s ", | |
613 | (hwirq < domain->revmap_size) ? "LINEAR" : "RADIX", | |
614 | direct ? "(DIRECT)" : ""); | |
0bb4afb4 | 615 | seq_printf(m, "%s\n", desc->irq_data.domain->name); |
cc79ca69 GL |
616 | } |
617 | ||
618 | raw_spin_unlock_irqrestore(&desc->lock, flags); | |
619 | } | |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
624 | static int virq_debug_open(struct inode *inode, struct file *file) | |
625 | { | |
626 | return single_open(file, virq_debug_show, inode->i_private); | |
627 | } | |
628 | ||
629 | static const struct file_operations virq_debug_fops = { | |
630 | .open = virq_debug_open, | |
631 | .read = seq_read, | |
632 | .llseek = seq_lseek, | |
633 | .release = single_release, | |
634 | }; | |
635 | ||
636 | static int __init irq_debugfs_init(void) | |
637 | { | |
092b2fb0 | 638 | if (debugfs_create_file("irq_domain_mapping", S_IRUGO, NULL, |
cc79ca69 GL |
639 | NULL, &virq_debug_fops) == NULL) |
640 | return -ENOMEM; | |
641 | ||
642 | return 0; | |
643 | } | |
644 | __initcall(irq_debugfs_init); | |
092b2fb0 | 645 | #endif /* CONFIG_IRQ_DOMAIN_DEBUG */ |
cc79ca69 | 646 | |
16b2e6e2 GL |
647 | /** |
648 | * irq_domain_xlate_onecell() - Generic xlate for direct one cell bindings | |
649 | * | |
650 | * Device Tree IRQ specifier translation function which works with one cell | |
651 | * bindings where the cell value maps directly to the hwirq number. | |
652 | */ | |
653 | int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr, | |
654 | const u32 *intspec, unsigned int intsize, | |
655 | unsigned long *out_hwirq, unsigned int *out_type) | |
7e713301 | 656 | { |
16b2e6e2 | 657 | if (WARN_ON(intsize < 1)) |
7e713301 | 658 | return -EINVAL; |
7e713301 GL |
659 | *out_hwirq = intspec[0]; |
660 | *out_type = IRQ_TYPE_NONE; | |
7e713301 GL |
661 | return 0; |
662 | } | |
16b2e6e2 GL |
663 | EXPORT_SYMBOL_GPL(irq_domain_xlate_onecell); |
664 | ||
665 | /** | |
666 | * irq_domain_xlate_twocell() - Generic xlate for direct two cell bindings | |
667 | * | |
668 | * Device Tree IRQ specifier translation function which works with two cell | |
669 | * bindings where the cell values map directly to the hwirq number | |
670 | * and linux irq flags. | |
671 | */ | |
672 | int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr, | |
673 | const u32 *intspec, unsigned int intsize, | |
674 | irq_hw_number_t *out_hwirq, unsigned int *out_type) | |
675 | { | |
676 | if (WARN_ON(intsize < 2)) | |
677 | return -EINVAL; | |
678 | *out_hwirq = intspec[0]; | |
679 | *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK; | |
680 | return 0; | |
681 | } | |
682 | EXPORT_SYMBOL_GPL(irq_domain_xlate_twocell); | |
683 | ||
684 | /** | |
685 | * irq_domain_xlate_onetwocell() - Generic xlate for one or two cell bindings | |
686 | * | |
687 | * Device Tree IRQ specifier translation function which works with either one | |
688 | * or two cell bindings where the cell values map directly to the hwirq number | |
689 | * and linux irq flags. | |
690 | * | |
691 | * Note: don't use this function unless your interrupt controller explicitly | |
692 | * supports both one and two cell bindings. For the majority of controllers | |
693 | * the _onecell() or _twocell() variants above should be used. | |
694 | */ | |
695 | int irq_domain_xlate_onetwocell(struct irq_domain *d, | |
696 | struct device_node *ctrlr, | |
697 | const u32 *intspec, unsigned int intsize, | |
698 | unsigned long *out_hwirq, unsigned int *out_type) | |
699 | { | |
700 | if (WARN_ON(intsize < 1)) | |
701 | return -EINVAL; | |
702 | *out_hwirq = intspec[0]; | |
703 | *out_type = (intsize > 1) ? intspec[1] : IRQ_TYPE_NONE; | |
704 | return 0; | |
705 | } | |
706 | EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell); | |
7e713301 | 707 | |
a18dc81b | 708 | const struct irq_domain_ops irq_domain_simple_ops = { |
16b2e6e2 | 709 | .xlate = irq_domain_xlate_onetwocell, |
75294957 GL |
710 | }; |
711 | EXPORT_SYMBOL_GPL(irq_domain_simple_ops); |