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1da177e4 LT |
1 | /* |
2 | * acpi_system.c - ACPI System Driver ($Revision: 63 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
26 | #include <linux/proc_fs.h> | |
27 | #include <linux/seq_file.h> | |
28 | #include <linux/init.h> | |
e108526e | 29 | #include <linux/string.h> |
1da177e4 LT |
30 | #include <asm/uaccess.h> |
31 | ||
32 | #include <acpi/acpi_drivers.h> | |
33 | ||
1da177e4 | 34 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
f52fd66d | 35 | ACPI_MODULE_NAME("system"); |
5bb730fd ZR |
36 | #ifdef MODULE_PARAM_PREFIX |
37 | #undef MODULE_PARAM_PREFIX | |
38 | #endif | |
39 | #define MODULE_PARAM_PREFIX "acpi." | |
40 | ||
1da177e4 | 41 | #define ACPI_SYSTEM_CLASS "system" |
1da177e4 | 42 | #define ACPI_SYSTEM_DEVICE_NAME "System" |
1da177e4 | 43 | |
5229e87d LB |
44 | u32 acpi_irq_handled; |
45 | ||
5bb730fd ZR |
46 | /* |
47 | * Make ACPICA version work as module param | |
48 | */ | |
d4c5f047 ZR |
49 | static int param_get_acpica_version(char *buffer, struct kernel_param *kp) |
50 | { | |
5bb730fd ZR |
51 | int result; |
52 | ||
53 | result = sprintf(buffer, "%x", ACPI_CA_VERSION); | |
54 | ||
55 | return result; | |
56 | } | |
57 | ||
58 | module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444); | |
59 | ||
d4c5f047 ZR |
60 | /* -------------------------------------------------------------------------- |
61 | FS Interface (/sys) | |
62 | -------------------------------------------------------------------------- */ | |
63 | static LIST_HEAD(acpi_table_attr_list); | |
a77aa28a | 64 | static struct kobject *tables_kobj; |
d4c5f047 ZR |
65 | |
66 | struct acpi_table_attr { | |
67 | struct bin_attribute attr; | |
68 | char name[8]; | |
69 | int instance; | |
70 | struct list_head node; | |
71 | }; | |
72 | ||
73 | static ssize_t acpi_table_show(struct kobject *kobj, | |
74 | struct bin_attribute *bin_attr, char *buf, | |
75 | loff_t offset, size_t count) | |
76 | { | |
77 | struct acpi_table_attr *table_attr = | |
78 | container_of(bin_attr, struct acpi_table_attr, attr); | |
79 | struct acpi_table_header *table_header = NULL; | |
80 | acpi_status status; | |
4feba70a PG |
81 | char name[ACPI_NAME_SIZE]; |
82 | ||
83 | if (strncmp(table_attr->name, "NULL", 4)) | |
84 | memcpy(name, table_attr->name, ACPI_NAME_SIZE); | |
85 | else | |
86 | memcpy(name, "\0\0\0\0", 4); | |
d4c5f047 ZR |
87 | |
88 | status = | |
4feba70a | 89 | acpi_get_table(name, table_attr->instance, |
d4c5f047 ZR |
90 | &table_header); |
91 | if (ACPI_FAILURE(status)) | |
92 | return -ENODEV; | |
93 | ||
46a21e46 AM |
94 | return memory_read_from_buffer(buf, count, &offset, |
95 | table_header, table_header->length); | |
d4c5f047 ZR |
96 | } |
97 | ||
98 | static void acpi_table_attr_init(struct acpi_table_attr *table_attr, | |
99 | struct acpi_table_header *table_header) | |
100 | { | |
101 | struct acpi_table_header *header = NULL; | |
102 | struct acpi_table_attr *attr = NULL; | |
103 | ||
4feba70a PG |
104 | if (table_header->signature[0] != '\0') |
105 | memcpy(table_attr->name, table_header->signature, | |
106 | ACPI_NAME_SIZE); | |
107 | else | |
108 | memcpy(table_attr->name, "NULL", 4); | |
d4c5f047 ZR |
109 | |
110 | list_for_each_entry(attr, &acpi_table_attr_list, node) { | |
4feba70a | 111 | if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE)) |
d4c5f047 ZR |
112 | if (table_attr->instance < attr->instance) |
113 | table_attr->instance = attr->instance; | |
114 | } | |
115 | table_attr->instance++; | |
116 | ||
117 | if (table_attr->instance > 1 || (table_attr->instance == 1 && | |
4feba70a PG |
118 | !acpi_get_table |
119 | (table_header->signature, 2, &header))) | |
120 | sprintf(table_attr->name + ACPI_NAME_SIZE, "%d", | |
121 | table_attr->instance); | |
d4c5f047 ZR |
122 | |
123 | table_attr->attr.size = 0; | |
124 | table_attr->attr.read = acpi_table_show; | |
125 | table_attr->attr.attr.name = table_attr->name; | |
126 | table_attr->attr.attr.mode = 0444; | |
d4c5f047 ZR |
127 | |
128 | return; | |
129 | } | |
130 | ||
131 | static int acpi_system_sysfs_init(void) | |
132 | { | |
133 | struct acpi_table_attr *table_attr; | |
134 | struct acpi_table_header *table_header = NULL; | |
135 | int table_index = 0; | |
136 | int result; | |
137 | ||
a77aa28a GKH |
138 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); |
139 | if (!tables_kobj) | |
140 | return -ENOMEM; | |
d4c5f047 ZR |
141 | |
142 | do { | |
143 | result = acpi_get_table_by_index(table_index, &table_header); | |
144 | if (!result) { | |
145 | table_index++; | |
146 | table_attr = NULL; | |
147 | table_attr = | |
148 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
149 | if (!table_attr) | |
150 | return -ENOMEM; | |
151 | ||
152 | acpi_table_attr_init(table_attr, table_header); | |
153 | result = | |
a77aa28a | 154 | sysfs_create_bin_file(tables_kobj, |
d4c5f047 ZR |
155 | &table_attr->attr); |
156 | if (result) { | |
157 | kfree(table_attr); | |
158 | return result; | |
159 | } else | |
160 | list_add_tail(&table_attr->node, | |
161 | &acpi_table_attr_list); | |
162 | } | |
163 | } while (!result); | |
a77aa28a | 164 | kobject_uevent(tables_kobj, KOBJ_ADD); |
d4c5f047 ZR |
165 | |
166 | return 0; | |
167 | } | |
168 | ||
5229e87d LB |
169 | /* |
170 | * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/ | |
171 | * See Documentation/ABI/testing/sysfs-firmware-acpi | |
172 | */ | |
173 | ||
174 | #define COUNT_GPE 0 | |
175 | #define COUNT_SCI 1 /* acpi_irq_handled */ | |
176 | #define COUNT_ERROR 2 /* other */ | |
177 | #define NUM_COUNTERS_EXTRA 3 | |
178 | ||
71b58cbb ZR |
179 | struct event_counter { |
180 | u32 count; | |
181 | u32 flags; | |
182 | }; | |
183 | ||
184 | static struct event_counter *all_counters; | |
5229e87d LB |
185 | static u32 num_gpes; |
186 | static u32 num_counters; | |
187 | static struct attribute **all_attrs; | |
188 | static u32 acpi_gpe_count; | |
189 | ||
190 | static struct attribute_group interrupt_stats_attr_group = { | |
191 | .name = "interrupts", | |
192 | }; | |
193 | static struct kobj_attribute *counter_attrs; | |
194 | ||
195 | static int count_num_gpes(void) | |
196 | { | |
197 | int count = 0; | |
198 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
199 | struct acpi_gpe_block_info *gpe_block; | |
200 | acpi_cpu_flags flags; | |
201 | ||
202 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
203 | ||
204 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
205 | while (gpe_xrupt_info) { | |
206 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
207 | while (gpe_block) { | |
208 | count += gpe_block->register_count * | |
209 | ACPI_GPE_REGISTER_WIDTH; | |
210 | gpe_block = gpe_block->next; | |
211 | } | |
212 | gpe_xrupt_info = gpe_xrupt_info->next; | |
213 | } | |
214 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
215 | ||
216 | return count; | |
217 | } | |
218 | ||
71b58cbb ZR |
219 | static int get_gpe_device(int index, acpi_handle *handle) |
220 | { | |
221 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
222 | struct acpi_gpe_block_info *gpe_block; | |
223 | acpi_cpu_flags flags; | |
224 | struct acpi_namespace_node *node; | |
225 | ||
226 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
227 | ||
228 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
229 | while (gpe_xrupt_info) { | |
230 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
231 | node = gpe_block->node; | |
232 | while (gpe_block) { | |
233 | index -= gpe_block->register_count * | |
234 | ACPI_GPE_REGISTER_WIDTH; | |
235 | if (index < 0) { | |
236 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
237 | /* return NULL if it's FADT GPE */ | |
238 | if (node->type != ACPI_TYPE_DEVICE) | |
239 | *handle = NULL; | |
240 | else | |
241 | *handle = node; | |
242 | return 0; | |
243 | } | |
244 | node = gpe_block->node; | |
245 | gpe_block = gpe_block->next; | |
246 | } | |
247 | gpe_xrupt_info = gpe_xrupt_info->next; | |
248 | } | |
249 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
250 | ||
251 | return -ENODEV; | |
252 | } | |
253 | ||
5229e87d LB |
254 | static void delete_gpe_attr_array(void) |
255 | { | |
71b58cbb | 256 | struct event_counter *tmp = all_counters; |
5229e87d LB |
257 | |
258 | all_counters = NULL; | |
259 | kfree(tmp); | |
260 | ||
261 | if (counter_attrs) { | |
262 | int i; | |
263 | ||
264 | for (i = 0; i < num_gpes; i++) | |
265 | kfree(counter_attrs[i].attr.name); | |
266 | ||
267 | kfree(counter_attrs); | |
268 | } | |
269 | kfree(all_attrs); | |
270 | ||
271 | return; | |
272 | } | |
273 | ||
274 | void acpi_os_gpe_count(u32 gpe_number) | |
275 | { | |
276 | acpi_gpe_count++; | |
277 | ||
278 | if (!all_counters) | |
279 | return; | |
280 | ||
281 | if (gpe_number < num_gpes) | |
71b58cbb | 282 | all_counters[gpe_number].count++; |
5229e87d | 283 | else |
71b58cbb ZR |
284 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]. |
285 | count++; | |
5229e87d LB |
286 | |
287 | return; | |
288 | } | |
289 | ||
290 | void acpi_os_fixed_event_count(u32 event_number) | |
291 | { | |
292 | if (!all_counters) | |
293 | return; | |
294 | ||
295 | if (event_number < ACPI_NUM_FIXED_EVENTS) | |
71b58cbb | 296 | all_counters[num_gpes + event_number].count++; |
5229e87d | 297 | else |
71b58cbb ZR |
298 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]. |
299 | count++; | |
5229e87d LB |
300 | |
301 | return; | |
302 | } | |
303 | ||
71b58cbb ZR |
304 | static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle) |
305 | { | |
306 | int result = 0; | |
307 | ||
308 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
309 | goto end; | |
310 | ||
311 | if (index < num_gpes) { | |
312 | result = get_gpe_device(index, handle); | |
313 | if (result) { | |
314 | ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, | |
315 | "Invalid GPE 0x%x\n", index)); | |
316 | goto end; | |
317 | } | |
318 | result = acpi_get_gpe_status(*handle, index, | |
319 | ACPI_NOT_ISR, status); | |
320 | } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) | |
321 | result = acpi_get_event_status(index - num_gpes, status); | |
322 | ||
71b58cbb ZR |
323 | end: |
324 | return result; | |
325 | } | |
326 | ||
5229e87d LB |
327 | static ssize_t counter_show(struct kobject *kobj, |
328 | struct kobj_attribute *attr, char *buf) | |
329 | { | |
71b58cbb ZR |
330 | int index = attr - counter_attrs; |
331 | int size; | |
332 | acpi_handle handle; | |
333 | acpi_event_status status; | |
334 | int result = 0; | |
335 | ||
336 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = | |
5229e87d | 337 | acpi_irq_handled; |
71b58cbb | 338 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = |
5229e87d LB |
339 | acpi_gpe_count; |
340 | ||
71b58cbb ZR |
341 | size = sprintf(buf, "%8d", all_counters[index].count); |
342 | ||
343 | /* "gpe_all" or "sci" */ | |
344 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
345 | goto end; | |
346 | ||
347 | result = get_status(index, &status, &handle); | |
348 | if (result) | |
349 | goto end; | |
350 | ||
ed206fac ZR |
351 | if (!(status & ACPI_EVENT_FLAG_HANDLE)) |
352 | size += sprintf(buf + size, " invalid"); | |
71b58cbb | 353 | else if (status & ACPI_EVENT_FLAG_ENABLED) |
ed206fac ZR |
354 | size += sprintf(buf + size, " enabled"); |
355 | else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED) | |
356 | size += sprintf(buf + size, " wake_enabled"); | |
71b58cbb | 357 | else |
ed206fac | 358 | size += sprintf(buf + size, " disabled"); |
71b58cbb ZR |
359 | |
360 | end: | |
361 | size += sprintf(buf + size, "\n"); | |
362 | return result ? result : size; | |
5229e87d LB |
363 | } |
364 | ||
365 | /* | |
366 | * counter_set() sets the specified counter. | |
367 | * setting the total "sci" file to any value clears all counters. | |
71b58cbb | 368 | * enable/disable/clear a gpe/fixed event in user space. |
5229e87d LB |
369 | */ |
370 | static ssize_t counter_set(struct kobject *kobj, | |
371 | struct kobj_attribute *attr, const char *buf, size_t size) | |
372 | { | |
373 | int index = attr - counter_attrs; | |
71b58cbb ZR |
374 | acpi_event_status status; |
375 | acpi_handle handle; | |
376 | int result = 0; | |
5229e87d LB |
377 | |
378 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { | |
379 | int i; | |
380 | for (i = 0; i < num_counters; ++i) | |
71b58cbb | 381 | all_counters[i].count = 0; |
5229e87d LB |
382 | acpi_gpe_count = 0; |
383 | acpi_irq_handled = 0; | |
71b58cbb ZR |
384 | goto end; |
385 | } | |
386 | ||
387 | /* show the event status for both GPEs and Fixed Events */ | |
388 | result = get_status(index, &status, &handle); | |
389 | if (result) | |
390 | goto end; | |
391 | ||
ed206fac | 392 | if (!(status & ACPI_EVENT_FLAG_HANDLE)) { |
55ac9a01 LM |
393 | printk(KERN_WARNING PREFIX |
394 | "Can not change Invalid GPE/Fixed Event status\n"); | |
71b58cbb ZR |
395 | return -EINVAL; |
396 | } | |
5229e87d | 397 | |
71b58cbb ZR |
398 | if (index < num_gpes) { |
399 | if (!strcmp(buf, "disable\n") && | |
400 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
0b7084ac | 401 | result = acpi_disable_gpe(handle, index); |
71b58cbb ZR |
402 | else if (!strcmp(buf, "enable\n") && |
403 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
0b7084ac | 404 | result = acpi_enable_gpe(handle, index); |
71b58cbb ZR |
405 | else if (!strcmp(buf, "clear\n") && |
406 | (status & ACPI_EVENT_FLAG_SET)) | |
407 | result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR); | |
408 | else | |
409 | all_counters[index].count = strtoul(buf, NULL, 0); | |
410 | } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { | |
411 | int event = index - num_gpes; | |
412 | if (!strcmp(buf, "disable\n") && | |
413 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
414 | result = acpi_disable_event(event, ACPI_NOT_ISR); | |
415 | else if (!strcmp(buf, "enable\n") && | |
416 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
417 | result = acpi_enable_event(event, ACPI_NOT_ISR); | |
418 | else if (!strcmp(buf, "clear\n") && | |
419 | (status & ACPI_EVENT_FLAG_SET)) | |
420 | result = acpi_clear_event(event); | |
421 | else | |
422 | all_counters[index].count = strtoul(buf, NULL, 0); | |
5229e87d | 423 | } else |
71b58cbb | 424 | all_counters[index].count = strtoul(buf, NULL, 0); |
5229e87d | 425 | |
71b58cbb ZR |
426 | if (ACPI_FAILURE(result)) |
427 | result = -EINVAL; | |
428 | end: | |
429 | return result ? result : size; | |
5229e87d LB |
430 | } |
431 | ||
432 | void acpi_irq_stats_init(void) | |
433 | { | |
434 | int i; | |
435 | ||
436 | if (all_counters) | |
437 | return; | |
438 | ||
439 | num_gpes = count_num_gpes(); | |
440 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; | |
441 | ||
442 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), | |
443 | GFP_KERNEL); | |
444 | if (all_attrs == NULL) | |
445 | return; | |
446 | ||
71b58cbb ZR |
447 | all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), |
448 | GFP_KERNEL); | |
5229e87d LB |
449 | if (all_counters == NULL) |
450 | goto fail; | |
451 | ||
452 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), | |
453 | GFP_KERNEL); | |
454 | if (counter_attrs == NULL) | |
455 | goto fail; | |
456 | ||
457 | for (i = 0; i < num_counters; ++i) { | |
c8dc9de1 | 458 | char buffer[12]; |
5229e87d LB |
459 | char *name; |
460 | ||
461 | if (i < num_gpes) | |
462 | sprintf(buffer, "gpe%02X", i); | |
463 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) | |
464 | sprintf(buffer, "ff_pmtimer"); | |
465 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) | |
466 | sprintf(buffer, "ff_gbl_lock"); | |
467 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) | |
468 | sprintf(buffer, "ff_pwr_btn"); | |
469 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) | |
470 | sprintf(buffer, "ff_slp_btn"); | |
471 | else if (i == num_gpes + ACPI_EVENT_RTC) | |
472 | sprintf(buffer, "ff_rt_clk"); | |
473 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) | |
474 | sprintf(buffer, "gpe_all"); | |
475 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) | |
476 | sprintf(buffer, "sci"); | |
477 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) | |
478 | sprintf(buffer, "error"); | |
479 | else | |
480 | sprintf(buffer, "bug%02X", i); | |
481 | ||
482 | name = kzalloc(strlen(buffer) + 1, GFP_KERNEL); | |
483 | if (name == NULL) | |
484 | goto fail; | |
485 | strncpy(name, buffer, strlen(buffer) + 1); | |
486 | ||
487 | counter_attrs[i].attr.name = name; | |
488 | counter_attrs[i].attr.mode = 0644; | |
489 | counter_attrs[i].show = counter_show; | |
490 | counter_attrs[i].store = counter_set; | |
491 | ||
492 | all_attrs[i] = &counter_attrs[i].attr; | |
493 | } | |
494 | ||
495 | interrupt_stats_attr_group.attrs = all_attrs; | |
b7143156 LB |
496 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) |
497 | return; | |
5229e87d LB |
498 | |
499 | fail: | |
500 | delete_gpe_attr_array(); | |
501 | return; | |
502 | } | |
503 | ||
504 | static void __exit interrupt_stats_exit(void) | |
505 | { | |
506 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); | |
507 | ||
508 | delete_gpe_attr_array(); | |
509 | ||
510 | return; | |
511 | } | |
512 | ||
1da177e4 LT |
513 | /* -------------------------------------------------------------------------- |
514 | FS Interface (/proc) | |
515 | -------------------------------------------------------------------------- */ | |
5bb730fd | 516 | #ifdef CONFIG_ACPI_PROCFS |
d4c5f047 ZR |
517 | #define ACPI_SYSTEM_FILE_INFO "info" |
518 | #define ACPI_SYSTEM_FILE_EVENT "event" | |
519 | #define ACPI_SYSTEM_FILE_DSDT "dsdt" | |
520 | #define ACPI_SYSTEM_FILE_FADT "fadt" | |
1da177e4 | 521 | |
4be44fcd | 522 | static int acpi_system_read_info(struct seq_file *seq, void *offset) |
1da177e4 | 523 | { |
1da177e4 LT |
524 | |
525 | seq_printf(seq, "version: %x\n", ACPI_CA_VERSION); | |
d550d98d | 526 | return 0; |
1da177e4 LT |
527 | } |
528 | ||
529 | static int acpi_system_info_open_fs(struct inode *inode, struct file *file) | |
530 | { | |
531 | return single_open(file, acpi_system_read_info, PDE(inode)->data); | |
532 | } | |
533 | ||
d7508032 | 534 | static const struct file_operations acpi_system_info_ops = { |
cf7acfab | 535 | .owner = THIS_MODULE, |
4be44fcd LB |
536 | .open = acpi_system_info_open_fs, |
537 | .read = seq_read, | |
538 | .llseek = seq_lseek, | |
539 | .release = single_release, | |
1da177e4 LT |
540 | }; |
541 | ||
4be44fcd LB |
542 | static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t, |
543 | loff_t *); | |
1da177e4 | 544 | |
d7508032 | 545 | static const struct file_operations acpi_system_dsdt_ops = { |
cf7acfab | 546 | .owner = THIS_MODULE, |
4be44fcd | 547 | .read = acpi_system_read_dsdt, |
1da177e4 LT |
548 | }; |
549 | ||
550 | static ssize_t | |
4be44fcd LB |
551 | acpi_system_read_dsdt(struct file *file, |
552 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 553 | { |
4be44fcd | 554 | acpi_status status = AE_OK; |
ad71860a | 555 | struct acpi_table_header *dsdt = NULL; |
4be44fcd | 556 | ssize_t res; |
1da177e4 | 557 | |
ad71860a | 558 | status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt); |
1da177e4 | 559 | if (ACPI_FAILURE(status)) |
d550d98d | 560 | return -ENODEV; |
1da177e4 | 561 | |
d4c5f047 | 562 | res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length); |
1da177e4 | 563 | |
d550d98d | 564 | return res; |
1da177e4 LT |
565 | } |
566 | ||
4be44fcd LB |
567 | static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t, |
568 | loff_t *); | |
1da177e4 | 569 | |
d7508032 | 570 | static const struct file_operations acpi_system_fadt_ops = { |
cf7acfab | 571 | .owner = THIS_MODULE, |
4be44fcd | 572 | .read = acpi_system_read_fadt, |
1da177e4 LT |
573 | }; |
574 | ||
575 | static ssize_t | |
4be44fcd LB |
576 | acpi_system_read_fadt(struct file *file, |
577 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 578 | { |
4be44fcd | 579 | acpi_status status = AE_OK; |
ad71860a | 580 | struct acpi_table_header *fadt = NULL; |
4be44fcd | 581 | ssize_t res; |
1da177e4 | 582 | |
ad71860a | 583 | status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt); |
1da177e4 | 584 | if (ACPI_FAILURE(status)) |
d550d98d | 585 | return -ENODEV; |
1da177e4 | 586 | |
d4c5f047 | 587 | res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length); |
1da177e4 | 588 | |
d550d98d | 589 | return res; |
1da177e4 LT |
590 | } |
591 | ||
d4c5f047 | 592 | static int acpi_system_procfs_init(void) |
1da177e4 | 593 | { |
4be44fcd | 594 | struct proc_dir_entry *entry; |
1da177e4 | 595 | int error = 0; |
1da177e4 | 596 | |
1da177e4 | 597 | /* 'info' [R] */ |
cf7acfab DL |
598 | entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir, |
599 | &acpi_system_info_ops); | |
1da177e4 LT |
600 | if (!entry) |
601 | goto Error; | |
1da177e4 LT |
602 | |
603 | /* 'dsdt' [R] */ | |
cf7acfab DL |
604 | entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir, |
605 | &acpi_system_dsdt_ops); | |
606 | if (!entry) | |
1da177e4 LT |
607 | goto Error; |
608 | ||
609 | /* 'fadt' [R] */ | |
cf7acfab DL |
610 | entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir, |
611 | &acpi_system_fadt_ops); | |
612 | if (!entry) | |
1da177e4 LT |
613 | goto Error; |
614 | ||
4be44fcd | 615 | Done: |
d550d98d | 616 | return error; |
1da177e4 | 617 | |
4be44fcd | 618 | Error: |
1da177e4 LT |
619 | remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir); |
620 | remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir); | |
621 | remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir); | |
622 | ||
623 | error = -EFAULT; | |
624 | goto Done; | |
625 | } | |
d4c5f047 ZR |
626 | #else |
627 | static int acpi_system_procfs_init(void) | |
628 | { | |
629 | return 0; | |
630 | } | |
631 | #endif | |
632 | ||
633 | static int __init acpi_system_init(void) | |
634 | { | |
635 | int result = 0; | |
636 | ||
637 | if (acpi_disabled) | |
638 | return 0; | |
639 | ||
640 | result = acpi_system_procfs_init(); | |
641 | if (result) | |
642 | return result; | |
643 | ||
644 | result = acpi_system_sysfs_init(); | |
645 | ||
646 | return result; | |
647 | } | |
1da177e4 | 648 | |
1da177e4 | 649 | subsys_initcall(acpi_system_init); |