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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/kernel/irq/proc.c | |
3 | * | |
4 | * Copyright (C) 1992, 1998-2004 Linus Torvalds, Ingo Molnar | |
5 | * | |
6 | * This file contains the /proc/irq/ handling code. | |
7 | */ | |
8 | ||
9 | #include <linux/irq.h> | |
5a0e3ad6 | 10 | #include <linux/gfp.h> |
1da177e4 | 11 | #include <linux/proc_fs.h> |
f18e439d | 12 | #include <linux/seq_file.h> |
1da177e4 | 13 | #include <linux/interrupt.h> |
c78b9b65 | 14 | #include <linux/kernel_stat.h> |
95c2b175 | 15 | #include <linux/mutex.h> |
1da177e4 | 16 | |
97a41e26 AB |
17 | #include "internals.h" |
18 | ||
c291ee62 TG |
19 | /* |
20 | * Access rules: | |
21 | * | |
22 | * procfs protects read/write of /proc/irq/N/ files against a | |
23 | * concurrent free of the interrupt descriptor. remove_proc_entry() | |
24 | * immediately prevents new read/writes to happen and waits for | |
25 | * already running read/write functions to complete. | |
26 | * | |
27 | * We remove the proc entries first and then delete the interrupt | |
28 | * descriptor from the radix tree and free it. So it is guaranteed | |
29 | * that irq_to_desc(N) is valid as long as the read/writes are | |
30 | * permitted by procfs. | |
31 | * | |
32 | * The read from /proc/interrupts is a different problem because there | |
33 | * is no protection. So the lookup and the access to irqdesc | |
34 | * information must be protected by sparse_irq_lock. | |
35 | */ | |
4a733ee1 | 36 | static struct proc_dir_entry *root_irq_dir; |
1da177e4 LT |
37 | |
38 | #ifdef CONFIG_SMP | |
39 | ||
0d3f5425 TG |
40 | enum { |
41 | AFFINITY, | |
42 | AFFINITY_LIST, | |
43 | EFFECTIVE, | |
44 | EFFECTIVE_LIST, | |
45 | }; | |
46 | ||
047dc633 | 47 | static int show_irq_affinity(int type, struct seq_file *m) |
1da177e4 | 48 | { |
08678b08 | 49 | struct irq_desc *desc = irq_to_desc((long)m->private); |
0d3f5425 | 50 | const struct cpumask *mask; |
42ee2b74 | 51 | |
0d3f5425 TG |
52 | switch (type) { |
53 | case AFFINITY: | |
54 | case AFFINITY_LIST: | |
55 | mask = desc->irq_common_data.affinity; | |
42ee2b74 | 56 | #ifdef CONFIG_GENERIC_PENDING_IRQ |
0d3f5425 TG |
57 | if (irqd_is_setaffinity_pending(&desc->irq_data)) |
58 | mask = desc->pending_mask; | |
42ee2b74 | 59 | #endif |
0d3f5425 TG |
60 | break; |
61 | case EFFECTIVE: | |
62 | case EFFECTIVE_LIST: | |
63 | #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK | |
6bc6d4ab | 64 | mask = irq_data_get_effective_affinity_mask(&desc->irq_data); |
0d3f5425 | 65 | break; |
0d3f5425 | 66 | #endif |
b33394ba TG |
67 | default: |
68 | return -EINVAL; | |
ce8bdd69 | 69 | } |
0d3f5425 TG |
70 | |
71 | switch (type) { | |
72 | case AFFINITY_LIST: | |
73 | case EFFECTIVE_LIST: | |
c1d7f03f | 74 | seq_printf(m, "%*pbl\n", cpumask_pr_args(mask)); |
0d3f5425 TG |
75 | break; |
76 | case AFFINITY: | |
77 | case EFFECTIVE: | |
c1d7f03f | 78 | seq_printf(m, "%*pb\n", cpumask_pr_args(mask)); |
0d3f5425 TG |
79 | break; |
80 | } | |
f18e439d | 81 | return 0; |
1da177e4 LT |
82 | } |
83 | ||
e7a297b0 PWJ |
84 | static int irq_affinity_hint_proc_show(struct seq_file *m, void *v) |
85 | { | |
86 | struct irq_desc *desc = irq_to_desc((long)m->private); | |
87 | unsigned long flags; | |
88 | cpumask_var_t mask; | |
89 | ||
4308ad80 | 90 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) |
e7a297b0 PWJ |
91 | return -ENOMEM; |
92 | ||
93 | raw_spin_lock_irqsave(&desc->lock, flags); | |
94 | if (desc->affinity_hint) | |
95 | cpumask_copy(mask, desc->affinity_hint); | |
e7a297b0 PWJ |
96 | raw_spin_unlock_irqrestore(&desc->lock, flags); |
97 | ||
c1d7f03f | 98 | seq_printf(m, "%*pb\n", cpumask_pr_args(mask)); |
e7a297b0 PWJ |
99 | free_cpumask_var(mask); |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
25d61578 JK |
104 | #ifndef is_affinity_mask_valid |
105 | #define is_affinity_mask_valid(val) 1 | |
106 | #endif | |
107 | ||
1da177e4 | 108 | int no_irq_affinity; |
4b060420 MT |
109 | static int irq_affinity_proc_show(struct seq_file *m, void *v) |
110 | { | |
0d3f5425 | 111 | return show_irq_affinity(AFFINITY, m); |
4b060420 MT |
112 | } |
113 | ||
114 | static int irq_affinity_list_proc_show(struct seq_file *m, void *v) | |
115 | { | |
0d3f5425 | 116 | return show_irq_affinity(AFFINITY_LIST, m); |
4b060420 MT |
117 | } |
118 | ||
119 | ||
120 | static ssize_t write_irq_affinity(int type, struct file *file, | |
f18e439d | 121 | const char __user *buffer, size_t count, loff_t *pos) |
1da177e4 | 122 | { |
d9dda78b | 123 | unsigned int irq = (int)(long)PDE_DATA(file_inode(file)); |
0de26520 | 124 | cpumask_var_t new_value; |
f18e439d | 125 | int err; |
1da177e4 | 126 | |
9c255583 | 127 | if (!irq_can_set_affinity_usr(irq) || no_irq_affinity) |
1da177e4 LT |
128 | return -EIO; |
129 | ||
0de26520 RR |
130 | if (!alloc_cpumask_var(&new_value, GFP_KERNEL)) |
131 | return -ENOMEM; | |
132 | ||
4b060420 MT |
133 | if (type) |
134 | err = cpumask_parselist_user(buffer, count, new_value); | |
135 | else | |
136 | err = cpumask_parse_user(buffer, count, new_value); | |
1da177e4 | 137 | if (err) |
0de26520 | 138 | goto free_cpumask; |
1da177e4 | 139 | |
6bdf197b | 140 | if (!is_affinity_mask_valid(new_value)) { |
0de26520 RR |
141 | err = -EINVAL; |
142 | goto free_cpumask; | |
143 | } | |
25d61578 | 144 | |
1da177e4 LT |
145 | /* |
146 | * Do not allow disabling IRQs completely - it's a too easy | |
147 | * way to make the system unusable accidentally :-) At least | |
148 | * one online CPU still has to be targeted. | |
149 | */ | |
0de26520 | 150 | if (!cpumask_intersects(new_value, cpu_online_mask)) { |
cba4235e TG |
151 | /* |
152 | * Special case for empty set - allow the architecture code | |
153 | * to set default SMP affinity. | |
154 | */ | |
155 | err = irq_select_affinity_usr(irq) ? -EINVAL : count; | |
0de26520 RR |
156 | } else { |
157 | irq_set_affinity(irq, new_value); | |
158 | err = count; | |
159 | } | |
160 | ||
161 | free_cpumask: | |
162 | free_cpumask_var(new_value); | |
163 | return err; | |
1da177e4 LT |
164 | } |
165 | ||
4b060420 MT |
166 | static ssize_t irq_affinity_proc_write(struct file *file, |
167 | const char __user *buffer, size_t count, loff_t *pos) | |
168 | { | |
169 | return write_irq_affinity(0, file, buffer, count, pos); | |
170 | } | |
171 | ||
172 | static ssize_t irq_affinity_list_proc_write(struct file *file, | |
173 | const char __user *buffer, size_t count, loff_t *pos) | |
174 | { | |
175 | return write_irq_affinity(1, file, buffer, count, pos); | |
176 | } | |
177 | ||
f18e439d | 178 | static int irq_affinity_proc_open(struct inode *inode, struct file *file) |
18404756 | 179 | { |
d9dda78b | 180 | return single_open(file, irq_affinity_proc_show, PDE_DATA(inode)); |
18404756 MK |
181 | } |
182 | ||
4b060420 MT |
183 | static int irq_affinity_list_proc_open(struct inode *inode, struct file *file) |
184 | { | |
d9dda78b | 185 | return single_open(file, irq_affinity_list_proc_show, PDE_DATA(inode)); |
4b060420 MT |
186 | } |
187 | ||
e7a297b0 PWJ |
188 | static int irq_affinity_hint_proc_open(struct inode *inode, struct file *file) |
189 | { | |
d9dda78b | 190 | return single_open(file, irq_affinity_hint_proc_show, PDE_DATA(inode)); |
e7a297b0 PWJ |
191 | } |
192 | ||
f18e439d AD |
193 | static const struct file_operations irq_affinity_proc_fops = { |
194 | .open = irq_affinity_proc_open, | |
195 | .read = seq_read, | |
196 | .llseek = seq_lseek, | |
197 | .release = single_release, | |
198 | .write = irq_affinity_proc_write, | |
199 | }; | |
200 | ||
e7a297b0 PWJ |
201 | static const struct file_operations irq_affinity_hint_proc_fops = { |
202 | .open = irq_affinity_hint_proc_open, | |
203 | .read = seq_read, | |
204 | .llseek = seq_lseek, | |
205 | .release = single_release, | |
206 | }; | |
207 | ||
4b060420 MT |
208 | static const struct file_operations irq_affinity_list_proc_fops = { |
209 | .open = irq_affinity_list_proc_open, | |
210 | .read = seq_read, | |
211 | .llseek = seq_lseek, | |
212 | .release = single_release, | |
213 | .write = irq_affinity_list_proc_write, | |
214 | }; | |
215 | ||
0d3f5425 TG |
216 | #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK |
217 | static int irq_effective_aff_proc_show(struct seq_file *m, void *v) | |
218 | { | |
219 | return show_irq_affinity(EFFECTIVE, m); | |
220 | } | |
221 | ||
222 | static int irq_effective_aff_list_proc_show(struct seq_file *m, void *v) | |
223 | { | |
224 | return show_irq_affinity(EFFECTIVE_LIST, m); | |
225 | } | |
226 | ||
227 | static int irq_effective_aff_proc_open(struct inode *inode, struct file *file) | |
228 | { | |
229 | return single_open(file, irq_effective_aff_proc_show, PDE_DATA(inode)); | |
230 | } | |
231 | ||
232 | static int irq_effective_aff_list_proc_open(struct inode *inode, | |
233 | struct file *file) | |
234 | { | |
235 | return single_open(file, irq_effective_aff_list_proc_show, | |
236 | PDE_DATA(inode)); | |
237 | } | |
238 | ||
239 | static const struct file_operations irq_effective_aff_proc_fops = { | |
240 | .open = irq_effective_aff_proc_open, | |
241 | .read = seq_read, | |
242 | .llseek = seq_lseek, | |
243 | .release = single_release, | |
244 | }; | |
245 | ||
246 | static const struct file_operations irq_effective_aff_list_proc_fops = { | |
247 | .open = irq_effective_aff_list_proc_open, | |
248 | .read = seq_read, | |
249 | .llseek = seq_lseek, | |
250 | .release = single_release, | |
251 | }; | |
252 | #endif | |
253 | ||
f18e439d AD |
254 | static int default_affinity_show(struct seq_file *m, void *v) |
255 | { | |
c1d7f03f | 256 | seq_printf(m, "%*pb\n", cpumask_pr_args(irq_default_affinity)); |
f18e439d AD |
257 | return 0; |
258 | } | |
259 | ||
260 | static ssize_t default_affinity_write(struct file *file, | |
261 | const char __user *buffer, size_t count, loff_t *ppos) | |
18404756 | 262 | { |
d036e67b | 263 | cpumask_var_t new_value; |
f18e439d | 264 | int err; |
18404756 | 265 | |
d036e67b RR |
266 | if (!alloc_cpumask_var(&new_value, GFP_KERNEL)) |
267 | return -ENOMEM; | |
268 | ||
269 | err = cpumask_parse_user(buffer, count, new_value); | |
18404756 | 270 | if (err) |
d036e67b | 271 | goto out; |
18404756 | 272 | |
d036e67b RR |
273 | if (!is_affinity_mask_valid(new_value)) { |
274 | err = -EINVAL; | |
275 | goto out; | |
276 | } | |
18404756 MK |
277 | |
278 | /* | |
279 | * Do not allow disabling IRQs completely - it's a too easy | |
280 | * way to make the system unusable accidentally :-) At least | |
281 | * one online CPU still has to be targeted. | |
282 | */ | |
d036e67b RR |
283 | if (!cpumask_intersects(new_value, cpu_online_mask)) { |
284 | err = -EINVAL; | |
285 | goto out; | |
286 | } | |
18404756 | 287 | |
d036e67b RR |
288 | cpumask_copy(irq_default_affinity, new_value); |
289 | err = count; | |
18404756 | 290 | |
d036e67b RR |
291 | out: |
292 | free_cpumask_var(new_value); | |
293 | return err; | |
18404756 | 294 | } |
f18e439d AD |
295 | |
296 | static int default_affinity_open(struct inode *inode, struct file *file) | |
297 | { | |
d9dda78b | 298 | return single_open(file, default_affinity_show, PDE_DATA(inode)); |
f18e439d AD |
299 | } |
300 | ||
301 | static const struct file_operations default_affinity_proc_fops = { | |
302 | .open = default_affinity_open, | |
303 | .read = seq_read, | |
304 | .llseek = seq_lseek, | |
305 | .release = single_release, | |
306 | .write = default_affinity_write, | |
307 | }; | |
92d6b71a DS |
308 | |
309 | static int irq_node_proc_show(struct seq_file *m, void *v) | |
310 | { | |
311 | struct irq_desc *desc = irq_to_desc((long) m->private); | |
312 | ||
6783011b | 313 | seq_printf(m, "%d\n", irq_desc_get_node(desc)); |
92d6b71a DS |
314 | return 0; |
315 | } | |
316 | ||
317 | static int irq_node_proc_open(struct inode *inode, struct file *file) | |
318 | { | |
d9dda78b | 319 | return single_open(file, irq_node_proc_show, PDE_DATA(inode)); |
92d6b71a DS |
320 | } |
321 | ||
322 | static const struct file_operations irq_node_proc_fops = { | |
323 | .open = irq_node_proc_open, | |
324 | .read = seq_read, | |
325 | .llseek = seq_lseek, | |
326 | .release = single_release, | |
327 | }; | |
1da177e4 LT |
328 | #endif |
329 | ||
a1afb637 | 330 | static int irq_spurious_proc_show(struct seq_file *m, void *v) |
96d97cf0 | 331 | { |
a1afb637 AD |
332 | struct irq_desc *desc = irq_to_desc((long) m->private); |
333 | ||
334 | seq_printf(m, "count %u\n" "unhandled %u\n" "last_unhandled %u ms\n", | |
335 | desc->irq_count, desc->irqs_unhandled, | |
336 | jiffies_to_msecs(desc->last_unhandled)); | |
337 | return 0; | |
338 | } | |
339 | ||
340 | static int irq_spurious_proc_open(struct inode *inode, struct file *file) | |
341 | { | |
d9dda78b | 342 | return single_open(file, irq_spurious_proc_show, PDE_DATA(inode)); |
96d97cf0 AK |
343 | } |
344 | ||
a1afb637 AD |
345 | static const struct file_operations irq_spurious_proc_fops = { |
346 | .open = irq_spurious_proc_open, | |
347 | .read = seq_read, | |
348 | .llseek = seq_lseek, | |
349 | .release = single_release, | |
350 | }; | |
351 | ||
1da177e4 LT |
352 | #define MAX_NAMELEN 128 |
353 | ||
354 | static int name_unique(unsigned int irq, struct irqaction *new_action) | |
355 | { | |
08678b08 | 356 | struct irq_desc *desc = irq_to_desc(irq); |
1da177e4 | 357 | struct irqaction *action; |
d2d9433a DA |
358 | unsigned long flags; |
359 | int ret = 1; | |
1da177e4 | 360 | |
239007b8 | 361 | raw_spin_lock_irqsave(&desc->lock, flags); |
f944b5a7 | 362 | for_each_action_of_desc(desc, action) { |
1da177e4 | 363 | if ((action != new_action) && action->name && |
d2d9433a DA |
364 | !strcmp(new_action->name, action->name)) { |
365 | ret = 0; | |
366 | break; | |
367 | } | |
368 | } | |
239007b8 | 369 | raw_spin_unlock_irqrestore(&desc->lock, flags); |
d2d9433a | 370 | return ret; |
1da177e4 LT |
371 | } |
372 | ||
373 | void register_handler_proc(unsigned int irq, struct irqaction *action) | |
374 | { | |
375 | char name [MAX_NAMELEN]; | |
08678b08 | 376 | struct irq_desc *desc = irq_to_desc(irq); |
1da177e4 | 377 | |
08678b08 | 378 | if (!desc->dir || action->dir || !action->name || |
1da177e4 LT |
379 | !name_unique(irq, action)) |
380 | return; | |
381 | ||
1da177e4 LT |
382 | snprintf(name, MAX_NAMELEN, "%s", action->name); |
383 | ||
384 | /* create /proc/irq/1234/handler/ */ | |
08678b08 | 385 | action->dir = proc_mkdir(name, desc->dir); |
1da177e4 LT |
386 | } |
387 | ||
388 | #undef MAX_NAMELEN | |
389 | ||
390 | #define MAX_NAMELEN 10 | |
391 | ||
2c6927a3 | 392 | void register_irq_proc(unsigned int irq, struct irq_desc *desc) |
1da177e4 | 393 | { |
95c2b175 | 394 | static DEFINE_MUTEX(register_lock); |
c1a80386 | 395 | void __maybe_unused *irqp = (void *)(unsigned long) irq; |
1da177e4 LT |
396 | char name [MAX_NAMELEN]; |
397 | ||
95c2b175 | 398 | if (!root_irq_dir || (desc->irq_data.chip == &no_irq_chip)) |
1da177e4 LT |
399 | return; |
400 | ||
95c2b175 BH |
401 | /* |
402 | * irq directories are registered only when a handler is | |
403 | * added, not when the descriptor is created, so multiple | |
404 | * tasks might try to register at the same time. | |
405 | */ | |
406 | mutex_lock(®ister_lock); | |
407 | ||
408 | if (desc->dir) | |
409 | goto out_unlock; | |
410 | ||
1da177e4 LT |
411 | sprintf(name, "%d", irq); |
412 | ||
413 | /* create /proc/irq/1234 */ | |
08678b08 | 414 | desc->dir = proc_mkdir(name, root_irq_dir); |
c82a43d4 | 415 | if (!desc->dir) |
95c2b175 | 416 | goto out_unlock; |
1da177e4 LT |
417 | |
418 | #ifdef CONFIG_SMP | |
f18e439d | 419 | /* create /proc/irq/<irq>/smp_affinity */ |
bab5c790 | 420 | proc_create_data("smp_affinity", 0644, desc->dir, |
c1a80386 | 421 | &irq_affinity_proc_fops, irqp); |
92d6b71a | 422 | |
e7a297b0 | 423 | /* create /proc/irq/<irq>/affinity_hint */ |
bab5c790 | 424 | proc_create_data("affinity_hint", 0444, desc->dir, |
c1a80386 | 425 | &irq_affinity_hint_proc_fops, irqp); |
e7a297b0 | 426 | |
4b060420 | 427 | /* create /proc/irq/<irq>/smp_affinity_list */ |
bab5c790 | 428 | proc_create_data("smp_affinity_list", 0644, desc->dir, |
c1a80386 | 429 | &irq_affinity_list_proc_fops, irqp); |
4b060420 | 430 | |
92d6b71a | 431 | proc_create_data("node", 0444, desc->dir, |
c1a80386 | 432 | &irq_node_proc_fops, irqp); |
0d3f5425 TG |
433 | # ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK |
434 | proc_create_data("effective_affinity", 0444, desc->dir, | |
435 | &irq_effective_aff_proc_fops, irqp); | |
436 | proc_create_data("effective_affinity_list", 0444, desc->dir, | |
437 | &irq_effective_aff_list_proc_fops, irqp); | |
438 | # endif | |
1da177e4 | 439 | #endif |
a1afb637 AD |
440 | proc_create_data("spurious", 0444, desc->dir, |
441 | &irq_spurious_proc_fops, (void *)(long)irq); | |
95c2b175 BH |
442 | |
443 | out_unlock: | |
444 | mutex_unlock(®ister_lock); | |
1da177e4 LT |
445 | } |
446 | ||
13bfe99e TG |
447 | void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) |
448 | { | |
449 | char name [MAX_NAMELEN]; | |
450 | ||
451 | if (!root_irq_dir || !desc->dir) | |
452 | return; | |
453 | #ifdef CONFIG_SMP | |
454 | remove_proc_entry("smp_affinity", desc->dir); | |
455 | remove_proc_entry("affinity_hint", desc->dir); | |
def945ee | 456 | remove_proc_entry("smp_affinity_list", desc->dir); |
13bfe99e | 457 | remove_proc_entry("node", desc->dir); |
0d3f5425 TG |
458 | # ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK |
459 | remove_proc_entry("effective_affinity", desc->dir); | |
460 | remove_proc_entry("effective_affinity_list", desc->dir); | |
461 | # endif | |
13bfe99e TG |
462 | #endif |
463 | remove_proc_entry("spurious", desc->dir); | |
464 | ||
13bfe99e TG |
465 | sprintf(name, "%u", irq); |
466 | remove_proc_entry(name, root_irq_dir); | |
467 | } | |
468 | ||
1da177e4 LT |
469 | #undef MAX_NAMELEN |
470 | ||
471 | void unregister_handler_proc(unsigned int irq, struct irqaction *action) | |
472 | { | |
a8ca16ea | 473 | proc_remove(action->dir); |
1da177e4 LT |
474 | } |
475 | ||
3786fc71 | 476 | static void register_default_affinity_proc(void) |
18404756 MK |
477 | { |
478 | #ifdef CONFIG_SMP | |
bab5c790 | 479 | proc_create("irq/default_smp_affinity", 0644, NULL, |
f18e439d | 480 | &default_affinity_proc_fops); |
18404756 MK |
481 | #endif |
482 | } | |
483 | ||
1da177e4 LT |
484 | void init_irq_proc(void) |
485 | { | |
2c6927a3 YL |
486 | unsigned int irq; |
487 | struct irq_desc *desc; | |
1da177e4 LT |
488 | |
489 | /* create /proc/irq */ | |
490 | root_irq_dir = proc_mkdir("irq", NULL); | |
491 | if (!root_irq_dir) | |
492 | return; | |
493 | ||
18404756 MK |
494 | register_default_affinity_proc(); |
495 | ||
1da177e4 LT |
496 | /* |
497 | * Create entries for all existing IRQs. | |
498 | */ | |
fe3464ca | 499 | for_each_irq_desc(irq, desc) |
2c6927a3 | 500 | register_irq_proc(irq, desc); |
1da177e4 LT |
501 | } |
502 | ||
c78b9b65 TG |
503 | #ifdef CONFIG_GENERIC_IRQ_SHOW |
504 | ||
505 | int __weak arch_show_interrupts(struct seq_file *p, int prec) | |
506 | { | |
507 | return 0; | |
508 | } | |
509 | ||
a6e120ed TG |
510 | #ifndef ACTUAL_NR_IRQS |
511 | # define ACTUAL_NR_IRQS nr_irqs | |
512 | #endif | |
513 | ||
c78b9b65 TG |
514 | int show_interrupts(struct seq_file *p, void *v) |
515 | { | |
516 | static int prec; | |
517 | ||
518 | unsigned long flags, any_count = 0; | |
519 | int i = *(loff_t *) v, j; | |
520 | struct irqaction *action; | |
521 | struct irq_desc *desc; | |
522 | ||
a6e120ed | 523 | if (i > ACTUAL_NR_IRQS) |
c78b9b65 TG |
524 | return 0; |
525 | ||
a6e120ed | 526 | if (i == ACTUAL_NR_IRQS) |
c78b9b65 TG |
527 | return arch_show_interrupts(p, prec); |
528 | ||
529 | /* print header and calculate the width of the first column */ | |
530 | if (i == 0) { | |
531 | for (prec = 3, j = 1000; prec < 10 && j <= nr_irqs; ++prec) | |
532 | j *= 10; | |
533 | ||
534 | seq_printf(p, "%*s", prec + 8, ""); | |
535 | for_each_online_cpu(j) | |
536 | seq_printf(p, "CPU%-8d", j); | |
537 | seq_putc(p, '\n'); | |
538 | } | |
539 | ||
c291ee62 | 540 | irq_lock_sparse(); |
c78b9b65 TG |
541 | desc = irq_to_desc(i); |
542 | if (!desc) | |
c291ee62 | 543 | goto outsparse; |
c78b9b65 TG |
544 | |
545 | raw_spin_lock_irqsave(&desc->lock, flags); | |
546 | for_each_online_cpu(j) | |
547 | any_count |= kstat_irqs_cpu(i, j); | |
548 | action = desc->action; | |
4717f133 | 549 | if ((!action || irq_desc_is_chained(desc)) && !any_count) |
c78b9b65 TG |
550 | goto out; |
551 | ||
552 | seq_printf(p, "%*d: ", prec, i); | |
553 | for_each_online_cpu(j) | |
554 | seq_printf(p, "%10u ", kstat_irqs_cpu(i, j)); | |
ab7798ff TG |
555 | |
556 | if (desc->irq_data.chip) { | |
557 | if (desc->irq_data.chip->irq_print_chip) | |
558 | desc->irq_data.chip->irq_print_chip(&desc->irq_data, p); | |
559 | else if (desc->irq_data.chip->name) | |
560 | seq_printf(p, " %8s", desc->irq_data.chip->name); | |
561 | else | |
562 | seq_printf(p, " %8s", "-"); | |
563 | } else { | |
564 | seq_printf(p, " %8s", "None"); | |
565 | } | |
c12d2f42 GL |
566 | if (desc->irq_data.domain) |
567 | seq_printf(p, " %*d", prec, (int) desc->irq_data.hwirq); | |
f435da41 HS |
568 | else |
569 | seq_printf(p, " %*s", prec, ""); | |
94b2c363 | 570 | #ifdef CONFIG_GENERIC_IRQ_SHOW_LEVEL |
ab7798ff TG |
571 | seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge"); |
572 | #endif | |
ee0401ec TG |
573 | if (desc->name) |
574 | seq_printf(p, "-%-8s", desc->name); | |
c78b9b65 TG |
575 | |
576 | if (action) { | |
577 | seq_printf(p, " %s", action->name); | |
578 | while ((action = action->next) != NULL) | |
579 | seq_printf(p, ", %s", action->name); | |
580 | } | |
581 | ||
582 | seq_putc(p, '\n'); | |
583 | out: | |
584 | raw_spin_unlock_irqrestore(&desc->lock, flags); | |
c291ee62 TG |
585 | outsparse: |
586 | irq_unlock_sparse(); | |
c78b9b65 TG |
587 | return 0; |
588 | } | |
589 | #endif |