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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; | |
d4c5f047 ZR |
81 | |
82 | status = | |
83 | acpi_get_table(table_attr->name, table_attr->instance, | |
84 | &table_header); | |
85 | if (ACPI_FAILURE(status)) | |
86 | return -ENODEV; | |
87 | ||
46a21e46 AM |
88 | return memory_read_from_buffer(buf, count, &offset, |
89 | table_header, table_header->length); | |
d4c5f047 ZR |
90 | } |
91 | ||
92 | static void acpi_table_attr_init(struct acpi_table_attr *table_attr, | |
93 | struct acpi_table_header *table_header) | |
94 | { | |
95 | struct acpi_table_header *header = NULL; | |
96 | struct acpi_table_attr *attr = NULL; | |
97 | ||
98 | memcpy(table_attr->name, table_header->signature, ACPI_NAME_SIZE); | |
99 | ||
100 | list_for_each_entry(attr, &acpi_table_attr_list, node) { | |
101 | if (!memcmp(table_header->signature, attr->name, | |
102 | ACPI_NAME_SIZE)) | |
103 | if (table_attr->instance < attr->instance) | |
104 | table_attr->instance = attr->instance; | |
105 | } | |
106 | table_attr->instance++; | |
107 | ||
108 | if (table_attr->instance > 1 || (table_attr->instance == 1 && | |
109 | !acpi_get_table(table_header-> | |
110 | signature, 2, | |
111 | &header))) | |
112 | sprintf(table_attr->name + 4, "%d", table_attr->instance); | |
113 | ||
114 | table_attr->attr.size = 0; | |
115 | table_attr->attr.read = acpi_table_show; | |
116 | table_attr->attr.attr.name = table_attr->name; | |
117 | table_attr->attr.attr.mode = 0444; | |
118 | table_attr->attr.attr.owner = THIS_MODULE; | |
119 | ||
120 | return; | |
121 | } | |
122 | ||
123 | static int acpi_system_sysfs_init(void) | |
124 | { | |
125 | struct acpi_table_attr *table_attr; | |
126 | struct acpi_table_header *table_header = NULL; | |
127 | int table_index = 0; | |
128 | int result; | |
129 | ||
a77aa28a GKH |
130 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); |
131 | if (!tables_kobj) | |
132 | return -ENOMEM; | |
d4c5f047 ZR |
133 | |
134 | do { | |
135 | result = acpi_get_table_by_index(table_index, &table_header); | |
136 | if (!result) { | |
137 | table_index++; | |
138 | table_attr = NULL; | |
139 | table_attr = | |
140 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
141 | if (!table_attr) | |
142 | return -ENOMEM; | |
143 | ||
144 | acpi_table_attr_init(table_attr, table_header); | |
145 | result = | |
a77aa28a | 146 | sysfs_create_bin_file(tables_kobj, |
d4c5f047 ZR |
147 | &table_attr->attr); |
148 | if (result) { | |
149 | kfree(table_attr); | |
150 | return result; | |
151 | } else | |
152 | list_add_tail(&table_attr->node, | |
153 | &acpi_table_attr_list); | |
154 | } | |
155 | } while (!result); | |
a77aa28a | 156 | kobject_uevent(tables_kobj, KOBJ_ADD); |
d4c5f047 ZR |
157 | |
158 | return 0; | |
159 | } | |
160 | ||
5229e87d LB |
161 | /* |
162 | * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/ | |
163 | * See Documentation/ABI/testing/sysfs-firmware-acpi | |
164 | */ | |
165 | ||
166 | #define COUNT_GPE 0 | |
167 | #define COUNT_SCI 1 /* acpi_irq_handled */ | |
168 | #define COUNT_ERROR 2 /* other */ | |
169 | #define NUM_COUNTERS_EXTRA 3 | |
170 | ||
71b58cbb ZR |
171 | #define ACPI_EVENT_VALID 0x01 |
172 | struct event_counter { | |
173 | u32 count; | |
174 | u32 flags; | |
175 | }; | |
176 | ||
177 | static struct event_counter *all_counters; | |
5229e87d LB |
178 | static u32 num_gpes; |
179 | static u32 num_counters; | |
180 | static struct attribute **all_attrs; | |
181 | static u32 acpi_gpe_count; | |
182 | ||
183 | static struct attribute_group interrupt_stats_attr_group = { | |
184 | .name = "interrupts", | |
185 | }; | |
186 | static struct kobj_attribute *counter_attrs; | |
187 | ||
188 | static int count_num_gpes(void) | |
189 | { | |
190 | int count = 0; | |
191 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
192 | struct acpi_gpe_block_info *gpe_block; | |
193 | acpi_cpu_flags flags; | |
194 | ||
195 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
196 | ||
197 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
198 | while (gpe_xrupt_info) { | |
199 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
200 | while (gpe_block) { | |
201 | count += gpe_block->register_count * | |
202 | ACPI_GPE_REGISTER_WIDTH; | |
203 | gpe_block = gpe_block->next; | |
204 | } | |
205 | gpe_xrupt_info = gpe_xrupt_info->next; | |
206 | } | |
207 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
208 | ||
209 | return count; | |
210 | } | |
211 | ||
71b58cbb ZR |
212 | static int get_gpe_device(int index, acpi_handle *handle) |
213 | { | |
214 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
215 | struct acpi_gpe_block_info *gpe_block; | |
216 | acpi_cpu_flags flags; | |
217 | struct acpi_namespace_node *node; | |
218 | ||
219 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
220 | ||
221 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
222 | while (gpe_xrupt_info) { | |
223 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
224 | node = gpe_block->node; | |
225 | while (gpe_block) { | |
226 | index -= gpe_block->register_count * | |
227 | ACPI_GPE_REGISTER_WIDTH; | |
228 | if (index < 0) { | |
229 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
230 | /* return NULL if it's FADT GPE */ | |
231 | if (node->type != ACPI_TYPE_DEVICE) | |
232 | *handle = NULL; | |
233 | else | |
234 | *handle = node; | |
235 | return 0; | |
236 | } | |
237 | node = gpe_block->node; | |
238 | gpe_block = gpe_block->next; | |
239 | } | |
240 | gpe_xrupt_info = gpe_xrupt_info->next; | |
241 | } | |
242 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
243 | ||
244 | return -ENODEV; | |
245 | } | |
246 | ||
5229e87d LB |
247 | static void delete_gpe_attr_array(void) |
248 | { | |
71b58cbb | 249 | struct event_counter *tmp = all_counters; |
5229e87d LB |
250 | |
251 | all_counters = NULL; | |
252 | kfree(tmp); | |
253 | ||
254 | if (counter_attrs) { | |
255 | int i; | |
256 | ||
257 | for (i = 0; i < num_gpes; i++) | |
258 | kfree(counter_attrs[i].attr.name); | |
259 | ||
260 | kfree(counter_attrs); | |
261 | } | |
262 | kfree(all_attrs); | |
263 | ||
264 | return; | |
265 | } | |
266 | ||
267 | void acpi_os_gpe_count(u32 gpe_number) | |
268 | { | |
269 | acpi_gpe_count++; | |
270 | ||
271 | if (!all_counters) | |
272 | return; | |
273 | ||
274 | if (gpe_number < num_gpes) | |
71b58cbb | 275 | all_counters[gpe_number].count++; |
5229e87d | 276 | else |
71b58cbb ZR |
277 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]. |
278 | count++; | |
5229e87d LB |
279 | |
280 | return; | |
281 | } | |
282 | ||
283 | void acpi_os_fixed_event_count(u32 event_number) | |
284 | { | |
285 | if (!all_counters) | |
286 | return; | |
287 | ||
288 | if (event_number < ACPI_NUM_FIXED_EVENTS) | |
71b58cbb | 289 | all_counters[num_gpes + event_number].count++; |
5229e87d | 290 | else |
71b58cbb ZR |
291 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]. |
292 | count++; | |
5229e87d LB |
293 | |
294 | return; | |
295 | } | |
296 | ||
71b58cbb ZR |
297 | static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle) |
298 | { | |
299 | int result = 0; | |
300 | ||
301 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
302 | goto end; | |
303 | ||
304 | if (index < num_gpes) { | |
305 | result = get_gpe_device(index, handle); | |
306 | if (result) { | |
307 | ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, | |
308 | "Invalid GPE 0x%x\n", index)); | |
309 | goto end; | |
310 | } | |
311 | result = acpi_get_gpe_status(*handle, index, | |
312 | ACPI_NOT_ISR, status); | |
313 | } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) | |
314 | result = acpi_get_event_status(index - num_gpes, status); | |
315 | ||
316 | /* | |
317 | * sleep/power button GPE/Fixed Event is enabled after acpi_system_init, | |
318 | * check the status at runtime and mark it as valid once it's enabled | |
319 | */ | |
320 | if (!result && (*status & ACPI_EVENT_FLAG_ENABLED)) | |
321 | all_counters[index].flags |= ACPI_EVENT_VALID; | |
322 | end: | |
323 | return result; | |
324 | } | |
325 | ||
5229e87d LB |
326 | static ssize_t counter_show(struct kobject *kobj, |
327 | struct kobj_attribute *attr, char *buf) | |
328 | { | |
71b58cbb ZR |
329 | int index = attr - counter_attrs; |
330 | int size; | |
331 | acpi_handle handle; | |
332 | acpi_event_status status; | |
333 | int result = 0; | |
334 | ||
335 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = | |
5229e87d | 336 | acpi_irq_handled; |
71b58cbb | 337 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = |
5229e87d LB |
338 | acpi_gpe_count; |
339 | ||
71b58cbb ZR |
340 | size = sprintf(buf, "%8d", all_counters[index].count); |
341 | ||
342 | /* "gpe_all" or "sci" */ | |
343 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
344 | goto end; | |
345 | ||
346 | result = get_status(index, &status, &handle); | |
347 | if (result) | |
348 | goto end; | |
349 | ||
350 | if (!(all_counters[index].flags & ACPI_EVENT_VALID)) | |
351 | size += sprintf(buf + size, " invalid"); | |
352 | else if (status & ACPI_EVENT_FLAG_ENABLED) | |
353 | size += sprintf(buf + size, " enable"); | |
354 | else | |
355 | size += sprintf(buf + size, " disable"); | |
356 | ||
357 | end: | |
358 | size += sprintf(buf + size, "\n"); | |
359 | return result ? result : size; | |
5229e87d LB |
360 | } |
361 | ||
362 | /* | |
363 | * counter_set() sets the specified counter. | |
364 | * setting the total "sci" file to any value clears all counters. | |
71b58cbb | 365 | * enable/disable/clear a gpe/fixed event in user space. |
5229e87d LB |
366 | */ |
367 | static ssize_t counter_set(struct kobject *kobj, | |
368 | struct kobj_attribute *attr, const char *buf, size_t size) | |
369 | { | |
370 | int index = attr - counter_attrs; | |
71b58cbb ZR |
371 | acpi_event_status status; |
372 | acpi_handle handle; | |
373 | int result = 0; | |
5229e87d LB |
374 | |
375 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { | |
376 | int i; | |
377 | for (i = 0; i < num_counters; ++i) | |
71b58cbb | 378 | all_counters[i].count = 0; |
5229e87d LB |
379 | acpi_gpe_count = 0; |
380 | acpi_irq_handled = 0; | |
71b58cbb ZR |
381 | goto end; |
382 | } | |
383 | ||
384 | /* show the event status for both GPEs and Fixed Events */ | |
385 | result = get_status(index, &status, &handle); | |
386 | if (result) | |
387 | goto end; | |
388 | ||
389 | if (!(all_counters[index].flags & ACPI_EVENT_VALID)) { | |
390 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, | |
391 | "Can not change Invalid GPE/Fixed Event status\n")); | |
392 | return -EINVAL; | |
393 | } | |
5229e87d | 394 | |
71b58cbb ZR |
395 | if (index < num_gpes) { |
396 | if (!strcmp(buf, "disable\n") && | |
397 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
398 | result = acpi_disable_gpe(handle, index, ACPI_NOT_ISR); | |
399 | else if (!strcmp(buf, "enable\n") && | |
400 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
401 | result = acpi_enable_gpe(handle, index, ACPI_NOT_ISR); | |
402 | else if (!strcmp(buf, "clear\n") && | |
403 | (status & ACPI_EVENT_FLAG_SET)) | |
404 | result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR); | |
405 | else | |
406 | all_counters[index].count = strtoul(buf, NULL, 0); | |
407 | } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { | |
408 | int event = index - num_gpes; | |
409 | if (!strcmp(buf, "disable\n") && | |
410 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
411 | result = acpi_disable_event(event, ACPI_NOT_ISR); | |
412 | else if (!strcmp(buf, "enable\n") && | |
413 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
414 | result = acpi_enable_event(event, ACPI_NOT_ISR); | |
415 | else if (!strcmp(buf, "clear\n") && | |
416 | (status & ACPI_EVENT_FLAG_SET)) | |
417 | result = acpi_clear_event(event); | |
418 | else | |
419 | all_counters[index].count = strtoul(buf, NULL, 0); | |
5229e87d | 420 | } else |
71b58cbb | 421 | all_counters[index].count = strtoul(buf, NULL, 0); |
5229e87d | 422 | |
71b58cbb ZR |
423 | if (ACPI_FAILURE(result)) |
424 | result = -EINVAL; | |
425 | end: | |
426 | return result ? result : size; | |
5229e87d LB |
427 | } |
428 | ||
429 | void acpi_irq_stats_init(void) | |
430 | { | |
431 | int i; | |
432 | ||
433 | if (all_counters) | |
434 | return; | |
435 | ||
436 | num_gpes = count_num_gpes(); | |
437 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; | |
438 | ||
439 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), | |
440 | GFP_KERNEL); | |
441 | if (all_attrs == NULL) | |
442 | return; | |
443 | ||
71b58cbb ZR |
444 | all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), |
445 | GFP_KERNEL); | |
5229e87d LB |
446 | if (all_counters == NULL) |
447 | goto fail; | |
448 | ||
449 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), | |
450 | GFP_KERNEL); | |
451 | if (counter_attrs == NULL) | |
452 | goto fail; | |
453 | ||
454 | for (i = 0; i < num_counters; ++i) { | |
c8dc9de1 | 455 | char buffer[12]; |
5229e87d LB |
456 | char *name; |
457 | ||
458 | if (i < num_gpes) | |
459 | sprintf(buffer, "gpe%02X", i); | |
460 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) | |
461 | sprintf(buffer, "ff_pmtimer"); | |
462 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) | |
463 | sprintf(buffer, "ff_gbl_lock"); | |
464 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) | |
465 | sprintf(buffer, "ff_pwr_btn"); | |
466 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) | |
467 | sprintf(buffer, "ff_slp_btn"); | |
468 | else if (i == num_gpes + ACPI_EVENT_RTC) | |
469 | sprintf(buffer, "ff_rt_clk"); | |
470 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) | |
471 | sprintf(buffer, "gpe_all"); | |
472 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) | |
473 | sprintf(buffer, "sci"); | |
474 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) | |
475 | sprintf(buffer, "error"); | |
476 | else | |
477 | sprintf(buffer, "bug%02X", i); | |
478 | ||
479 | name = kzalloc(strlen(buffer) + 1, GFP_KERNEL); | |
480 | if (name == NULL) | |
481 | goto fail; | |
482 | strncpy(name, buffer, strlen(buffer) + 1); | |
483 | ||
484 | counter_attrs[i].attr.name = name; | |
485 | counter_attrs[i].attr.mode = 0644; | |
486 | counter_attrs[i].show = counter_show; | |
487 | counter_attrs[i].store = counter_set; | |
488 | ||
489 | all_attrs[i] = &counter_attrs[i].attr; | |
490 | } | |
491 | ||
492 | interrupt_stats_attr_group.attrs = all_attrs; | |
b7143156 LB |
493 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) |
494 | return; | |
5229e87d LB |
495 | |
496 | fail: | |
497 | delete_gpe_attr_array(); | |
498 | return; | |
499 | } | |
500 | ||
501 | static void __exit interrupt_stats_exit(void) | |
502 | { | |
503 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); | |
504 | ||
505 | delete_gpe_attr_array(); | |
506 | ||
507 | return; | |
508 | } | |
509 | ||
1da177e4 LT |
510 | /* -------------------------------------------------------------------------- |
511 | FS Interface (/proc) | |
512 | -------------------------------------------------------------------------- */ | |
5bb730fd | 513 | #ifdef CONFIG_ACPI_PROCFS |
d4c5f047 ZR |
514 | #define ACPI_SYSTEM_FILE_INFO "info" |
515 | #define ACPI_SYSTEM_FILE_EVENT "event" | |
516 | #define ACPI_SYSTEM_FILE_DSDT "dsdt" | |
517 | #define ACPI_SYSTEM_FILE_FADT "fadt" | |
1da177e4 | 518 | |
4be44fcd | 519 | static int acpi_system_read_info(struct seq_file *seq, void *offset) |
1da177e4 | 520 | { |
1da177e4 LT |
521 | |
522 | seq_printf(seq, "version: %x\n", ACPI_CA_VERSION); | |
d550d98d | 523 | return 0; |
1da177e4 LT |
524 | } |
525 | ||
526 | static int acpi_system_info_open_fs(struct inode *inode, struct file *file) | |
527 | { | |
528 | return single_open(file, acpi_system_read_info, PDE(inode)->data); | |
529 | } | |
530 | ||
d7508032 | 531 | static const struct file_operations acpi_system_info_ops = { |
cf7acfab | 532 | .owner = THIS_MODULE, |
4be44fcd LB |
533 | .open = acpi_system_info_open_fs, |
534 | .read = seq_read, | |
535 | .llseek = seq_lseek, | |
536 | .release = single_release, | |
1da177e4 LT |
537 | }; |
538 | ||
4be44fcd LB |
539 | static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t, |
540 | loff_t *); | |
1da177e4 | 541 | |
d7508032 | 542 | static const struct file_operations acpi_system_dsdt_ops = { |
cf7acfab | 543 | .owner = THIS_MODULE, |
4be44fcd | 544 | .read = acpi_system_read_dsdt, |
1da177e4 LT |
545 | }; |
546 | ||
547 | static ssize_t | |
4be44fcd LB |
548 | acpi_system_read_dsdt(struct file *file, |
549 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 550 | { |
4be44fcd | 551 | acpi_status status = AE_OK; |
ad71860a | 552 | struct acpi_table_header *dsdt = NULL; |
4be44fcd | 553 | ssize_t res; |
1da177e4 | 554 | |
ad71860a | 555 | status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt); |
1da177e4 | 556 | if (ACPI_FAILURE(status)) |
d550d98d | 557 | return -ENODEV; |
1da177e4 | 558 | |
d4c5f047 | 559 | res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length); |
1da177e4 | 560 | |
d550d98d | 561 | return res; |
1da177e4 LT |
562 | } |
563 | ||
4be44fcd LB |
564 | static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t, |
565 | loff_t *); | |
1da177e4 | 566 | |
d7508032 | 567 | static const struct file_operations acpi_system_fadt_ops = { |
cf7acfab | 568 | .owner = THIS_MODULE, |
4be44fcd | 569 | .read = acpi_system_read_fadt, |
1da177e4 LT |
570 | }; |
571 | ||
572 | static ssize_t | |
4be44fcd LB |
573 | acpi_system_read_fadt(struct file *file, |
574 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 575 | { |
4be44fcd | 576 | acpi_status status = AE_OK; |
ad71860a | 577 | struct acpi_table_header *fadt = NULL; |
4be44fcd | 578 | ssize_t res; |
1da177e4 | 579 | |
ad71860a | 580 | status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt); |
1da177e4 | 581 | if (ACPI_FAILURE(status)) |
d550d98d | 582 | return -ENODEV; |
1da177e4 | 583 | |
d4c5f047 | 584 | res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length); |
1da177e4 | 585 | |
d550d98d | 586 | return res; |
1da177e4 LT |
587 | } |
588 | ||
d4c5f047 | 589 | static int acpi_system_procfs_init(void) |
1da177e4 | 590 | { |
4be44fcd | 591 | struct proc_dir_entry *entry; |
1da177e4 | 592 | int error = 0; |
1da177e4 | 593 | |
1da177e4 | 594 | /* 'info' [R] */ |
cf7acfab DL |
595 | entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir, |
596 | &acpi_system_info_ops); | |
1da177e4 LT |
597 | if (!entry) |
598 | goto Error; | |
1da177e4 LT |
599 | |
600 | /* 'dsdt' [R] */ | |
cf7acfab DL |
601 | entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir, |
602 | &acpi_system_dsdt_ops); | |
603 | if (!entry) | |
1da177e4 LT |
604 | goto Error; |
605 | ||
606 | /* 'fadt' [R] */ | |
cf7acfab DL |
607 | entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir, |
608 | &acpi_system_fadt_ops); | |
609 | if (!entry) | |
1da177e4 LT |
610 | goto Error; |
611 | ||
4be44fcd | 612 | Done: |
d550d98d | 613 | return error; |
1da177e4 | 614 | |
4be44fcd | 615 | Error: |
1da177e4 LT |
616 | remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir); |
617 | remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir); | |
618 | remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir); | |
619 | ||
620 | error = -EFAULT; | |
621 | goto Done; | |
622 | } | |
d4c5f047 ZR |
623 | #else |
624 | static int acpi_system_procfs_init(void) | |
625 | { | |
626 | return 0; | |
627 | } | |
628 | #endif | |
629 | ||
630 | static int __init acpi_system_init(void) | |
631 | { | |
632 | int result = 0; | |
633 | ||
634 | if (acpi_disabled) | |
635 | return 0; | |
636 | ||
637 | result = acpi_system_procfs_init(); | |
638 | if (result) | |
639 | return result; | |
640 | ||
641 | result = acpi_system_sysfs_init(); | |
642 | ||
643 | return result; | |
644 | } | |
1da177e4 | 645 | |
1da177e4 | 646 | subsys_initcall(acpi_system_init); |