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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; | |
d4c5f047 ZR |
118 | |
119 | return; | |
120 | } | |
121 | ||
122 | static int acpi_system_sysfs_init(void) | |
123 | { | |
124 | struct acpi_table_attr *table_attr; | |
125 | struct acpi_table_header *table_header = NULL; | |
126 | int table_index = 0; | |
127 | int result; | |
128 | ||
a77aa28a GKH |
129 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); |
130 | if (!tables_kobj) | |
131 | return -ENOMEM; | |
d4c5f047 ZR |
132 | |
133 | do { | |
134 | result = acpi_get_table_by_index(table_index, &table_header); | |
135 | if (!result) { | |
136 | table_index++; | |
137 | table_attr = NULL; | |
138 | table_attr = | |
139 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
140 | if (!table_attr) | |
141 | return -ENOMEM; | |
142 | ||
143 | acpi_table_attr_init(table_attr, table_header); | |
144 | result = | |
a77aa28a | 145 | sysfs_create_bin_file(tables_kobj, |
d4c5f047 ZR |
146 | &table_attr->attr); |
147 | if (result) { | |
148 | kfree(table_attr); | |
149 | return result; | |
150 | } else | |
151 | list_add_tail(&table_attr->node, | |
152 | &acpi_table_attr_list); | |
153 | } | |
154 | } while (!result); | |
a77aa28a | 155 | kobject_uevent(tables_kobj, KOBJ_ADD); |
d4c5f047 ZR |
156 | |
157 | return 0; | |
158 | } | |
159 | ||
5229e87d LB |
160 | /* |
161 | * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/ | |
162 | * See Documentation/ABI/testing/sysfs-firmware-acpi | |
163 | */ | |
164 | ||
165 | #define COUNT_GPE 0 | |
166 | #define COUNT_SCI 1 /* acpi_irq_handled */ | |
167 | #define COUNT_ERROR 2 /* other */ | |
168 | #define NUM_COUNTERS_EXTRA 3 | |
169 | ||
71b58cbb ZR |
170 | #define ACPI_EVENT_VALID 0x01 |
171 | struct event_counter { | |
172 | u32 count; | |
173 | u32 flags; | |
174 | }; | |
175 | ||
176 | static struct event_counter *all_counters; | |
5229e87d LB |
177 | static u32 num_gpes; |
178 | static u32 num_counters; | |
179 | static struct attribute **all_attrs; | |
180 | static u32 acpi_gpe_count; | |
181 | ||
182 | static struct attribute_group interrupt_stats_attr_group = { | |
183 | .name = "interrupts", | |
184 | }; | |
185 | static struct kobj_attribute *counter_attrs; | |
186 | ||
187 | static int count_num_gpes(void) | |
188 | { | |
189 | int count = 0; | |
190 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
191 | struct acpi_gpe_block_info *gpe_block; | |
192 | acpi_cpu_flags flags; | |
193 | ||
194 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
195 | ||
196 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
197 | while (gpe_xrupt_info) { | |
198 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
199 | while (gpe_block) { | |
200 | count += gpe_block->register_count * | |
201 | ACPI_GPE_REGISTER_WIDTH; | |
202 | gpe_block = gpe_block->next; | |
203 | } | |
204 | gpe_xrupt_info = gpe_xrupt_info->next; | |
205 | } | |
206 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
207 | ||
208 | return count; | |
209 | } | |
210 | ||
71b58cbb ZR |
211 | static int get_gpe_device(int index, acpi_handle *handle) |
212 | { | |
213 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
214 | struct acpi_gpe_block_info *gpe_block; | |
215 | acpi_cpu_flags flags; | |
216 | struct acpi_namespace_node *node; | |
217 | ||
218 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
219 | ||
220 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
221 | while (gpe_xrupt_info) { | |
222 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
223 | node = gpe_block->node; | |
224 | while (gpe_block) { | |
225 | index -= gpe_block->register_count * | |
226 | ACPI_GPE_REGISTER_WIDTH; | |
227 | if (index < 0) { | |
228 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
229 | /* return NULL if it's FADT GPE */ | |
230 | if (node->type != ACPI_TYPE_DEVICE) | |
231 | *handle = NULL; | |
232 | else | |
233 | *handle = node; | |
234 | return 0; | |
235 | } | |
236 | node = gpe_block->node; | |
237 | gpe_block = gpe_block->next; | |
238 | } | |
239 | gpe_xrupt_info = gpe_xrupt_info->next; | |
240 | } | |
241 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
242 | ||
243 | return -ENODEV; | |
244 | } | |
245 | ||
5229e87d LB |
246 | static void delete_gpe_attr_array(void) |
247 | { | |
71b58cbb | 248 | struct event_counter *tmp = all_counters; |
5229e87d LB |
249 | |
250 | all_counters = NULL; | |
251 | kfree(tmp); | |
252 | ||
253 | if (counter_attrs) { | |
254 | int i; | |
255 | ||
256 | for (i = 0; i < num_gpes; i++) | |
257 | kfree(counter_attrs[i].attr.name); | |
258 | ||
259 | kfree(counter_attrs); | |
260 | } | |
261 | kfree(all_attrs); | |
262 | ||
263 | return; | |
264 | } | |
265 | ||
266 | void acpi_os_gpe_count(u32 gpe_number) | |
267 | { | |
268 | acpi_gpe_count++; | |
269 | ||
270 | if (!all_counters) | |
271 | return; | |
272 | ||
273 | if (gpe_number < num_gpes) | |
71b58cbb | 274 | all_counters[gpe_number].count++; |
5229e87d | 275 | else |
71b58cbb ZR |
276 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]. |
277 | count++; | |
5229e87d LB |
278 | |
279 | return; | |
280 | } | |
281 | ||
282 | void acpi_os_fixed_event_count(u32 event_number) | |
283 | { | |
284 | if (!all_counters) | |
285 | return; | |
286 | ||
287 | if (event_number < ACPI_NUM_FIXED_EVENTS) | |
71b58cbb | 288 | all_counters[num_gpes + event_number].count++; |
5229e87d | 289 | else |
71b58cbb ZR |
290 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]. |
291 | count++; | |
5229e87d LB |
292 | |
293 | return; | |
294 | } | |
295 | ||
71b58cbb ZR |
296 | static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle) |
297 | { | |
298 | int result = 0; | |
299 | ||
300 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
301 | goto end; | |
302 | ||
303 | if (index < num_gpes) { | |
304 | result = get_gpe_device(index, handle); | |
305 | if (result) { | |
306 | ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, | |
307 | "Invalid GPE 0x%x\n", index)); | |
308 | goto end; | |
309 | } | |
310 | result = acpi_get_gpe_status(*handle, index, | |
311 | ACPI_NOT_ISR, status); | |
312 | } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) | |
313 | result = acpi_get_event_status(index - num_gpes, status); | |
314 | ||
315 | /* | |
316 | * sleep/power button GPE/Fixed Event is enabled after acpi_system_init, | |
317 | * check the status at runtime and mark it as valid once it's enabled | |
318 | */ | |
319 | if (!result && (*status & ACPI_EVENT_FLAG_ENABLED)) | |
320 | all_counters[index].flags |= ACPI_EVENT_VALID; | |
321 | end: | |
322 | return result; | |
323 | } | |
324 | ||
5229e87d LB |
325 | static ssize_t counter_show(struct kobject *kobj, |
326 | struct kobj_attribute *attr, char *buf) | |
327 | { | |
71b58cbb ZR |
328 | int index = attr - counter_attrs; |
329 | int size; | |
330 | acpi_handle handle; | |
331 | acpi_event_status status; | |
332 | int result = 0; | |
333 | ||
334 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = | |
5229e87d | 335 | acpi_irq_handled; |
71b58cbb | 336 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = |
5229e87d LB |
337 | acpi_gpe_count; |
338 | ||
71b58cbb ZR |
339 | size = sprintf(buf, "%8d", all_counters[index].count); |
340 | ||
341 | /* "gpe_all" or "sci" */ | |
342 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
343 | goto end; | |
344 | ||
345 | result = get_status(index, &status, &handle); | |
346 | if (result) | |
347 | goto end; | |
348 | ||
349 | if (!(all_counters[index].flags & ACPI_EVENT_VALID)) | |
350 | size += sprintf(buf + size, " invalid"); | |
351 | else if (status & ACPI_EVENT_FLAG_ENABLED) | |
352 | size += sprintf(buf + size, " enable"); | |
353 | else | |
354 | size += sprintf(buf + size, " disable"); | |
355 | ||
356 | end: | |
357 | size += sprintf(buf + size, "\n"); | |
358 | return result ? result : size; | |
5229e87d LB |
359 | } |
360 | ||
361 | /* | |
362 | * counter_set() sets the specified counter. | |
363 | * setting the total "sci" file to any value clears all counters. | |
71b58cbb | 364 | * enable/disable/clear a gpe/fixed event in user space. |
5229e87d LB |
365 | */ |
366 | static ssize_t counter_set(struct kobject *kobj, | |
367 | struct kobj_attribute *attr, const char *buf, size_t size) | |
368 | { | |
369 | int index = attr - counter_attrs; | |
71b58cbb ZR |
370 | acpi_event_status status; |
371 | acpi_handle handle; | |
372 | int result = 0; | |
5229e87d LB |
373 | |
374 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { | |
375 | int i; | |
376 | for (i = 0; i < num_counters; ++i) | |
71b58cbb | 377 | all_counters[i].count = 0; |
5229e87d LB |
378 | acpi_gpe_count = 0; |
379 | acpi_irq_handled = 0; | |
71b58cbb ZR |
380 | goto end; |
381 | } | |
382 | ||
383 | /* show the event status for both GPEs and Fixed Events */ | |
384 | result = get_status(index, &status, &handle); | |
385 | if (result) | |
386 | goto end; | |
387 | ||
388 | if (!(all_counters[index].flags & ACPI_EVENT_VALID)) { | |
55ac9a01 LM |
389 | printk(KERN_WARNING PREFIX |
390 | "Can not change Invalid GPE/Fixed Event status\n"); | |
71b58cbb ZR |
391 | return -EINVAL; |
392 | } | |
5229e87d | 393 | |
71b58cbb ZR |
394 | if (index < num_gpes) { |
395 | if (!strcmp(buf, "disable\n") && | |
396 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
397 | result = acpi_disable_gpe(handle, index, ACPI_NOT_ISR); | |
398 | else if (!strcmp(buf, "enable\n") && | |
399 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
400 | result = acpi_enable_gpe(handle, index, ACPI_NOT_ISR); | |
401 | else if (!strcmp(buf, "clear\n") && | |
402 | (status & ACPI_EVENT_FLAG_SET)) | |
403 | result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR); | |
404 | else | |
405 | all_counters[index].count = strtoul(buf, NULL, 0); | |
406 | } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { | |
407 | int event = index - num_gpes; | |
408 | if (!strcmp(buf, "disable\n") && | |
409 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
410 | result = acpi_disable_event(event, ACPI_NOT_ISR); | |
411 | else if (!strcmp(buf, "enable\n") && | |
412 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
413 | result = acpi_enable_event(event, ACPI_NOT_ISR); | |
414 | else if (!strcmp(buf, "clear\n") && | |
415 | (status & ACPI_EVENT_FLAG_SET)) | |
416 | result = acpi_clear_event(event); | |
417 | else | |
418 | all_counters[index].count = strtoul(buf, NULL, 0); | |
5229e87d | 419 | } else |
71b58cbb | 420 | all_counters[index].count = strtoul(buf, NULL, 0); |
5229e87d | 421 | |
71b58cbb ZR |
422 | if (ACPI_FAILURE(result)) |
423 | result = -EINVAL; | |
424 | end: | |
425 | return result ? result : size; | |
5229e87d LB |
426 | } |
427 | ||
428 | void acpi_irq_stats_init(void) | |
429 | { | |
430 | int i; | |
431 | ||
432 | if (all_counters) | |
433 | return; | |
434 | ||
435 | num_gpes = count_num_gpes(); | |
436 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; | |
437 | ||
438 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), | |
439 | GFP_KERNEL); | |
440 | if (all_attrs == NULL) | |
441 | return; | |
442 | ||
71b58cbb ZR |
443 | all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), |
444 | GFP_KERNEL); | |
5229e87d LB |
445 | if (all_counters == NULL) |
446 | goto fail; | |
447 | ||
448 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), | |
449 | GFP_KERNEL); | |
450 | if (counter_attrs == NULL) | |
451 | goto fail; | |
452 | ||
453 | for (i = 0; i < num_counters; ++i) { | |
c8dc9de1 | 454 | char buffer[12]; |
5229e87d LB |
455 | char *name; |
456 | ||
457 | if (i < num_gpes) | |
458 | sprintf(buffer, "gpe%02X", i); | |
459 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) | |
460 | sprintf(buffer, "ff_pmtimer"); | |
461 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) | |
462 | sprintf(buffer, "ff_gbl_lock"); | |
463 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) | |
464 | sprintf(buffer, "ff_pwr_btn"); | |
465 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) | |
466 | sprintf(buffer, "ff_slp_btn"); | |
467 | else if (i == num_gpes + ACPI_EVENT_RTC) | |
468 | sprintf(buffer, "ff_rt_clk"); | |
469 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) | |
470 | sprintf(buffer, "gpe_all"); | |
471 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) | |
472 | sprintf(buffer, "sci"); | |
473 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) | |
474 | sprintf(buffer, "error"); | |
475 | else | |
476 | sprintf(buffer, "bug%02X", i); | |
477 | ||
478 | name = kzalloc(strlen(buffer) + 1, GFP_KERNEL); | |
479 | if (name == NULL) | |
480 | goto fail; | |
481 | strncpy(name, buffer, strlen(buffer) + 1); | |
482 | ||
483 | counter_attrs[i].attr.name = name; | |
484 | counter_attrs[i].attr.mode = 0644; | |
485 | counter_attrs[i].show = counter_show; | |
486 | counter_attrs[i].store = counter_set; | |
487 | ||
488 | all_attrs[i] = &counter_attrs[i].attr; | |
489 | } | |
490 | ||
491 | interrupt_stats_attr_group.attrs = all_attrs; | |
b7143156 LB |
492 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) |
493 | return; | |
5229e87d LB |
494 | |
495 | fail: | |
496 | delete_gpe_attr_array(); | |
497 | return; | |
498 | } | |
499 | ||
500 | static void __exit interrupt_stats_exit(void) | |
501 | { | |
502 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); | |
503 | ||
504 | delete_gpe_attr_array(); | |
505 | ||
506 | return; | |
507 | } | |
508 | ||
1da177e4 LT |
509 | /* -------------------------------------------------------------------------- |
510 | FS Interface (/proc) | |
511 | -------------------------------------------------------------------------- */ | |
5bb730fd | 512 | #ifdef CONFIG_ACPI_PROCFS |
d4c5f047 ZR |
513 | #define ACPI_SYSTEM_FILE_INFO "info" |
514 | #define ACPI_SYSTEM_FILE_EVENT "event" | |
515 | #define ACPI_SYSTEM_FILE_DSDT "dsdt" | |
516 | #define ACPI_SYSTEM_FILE_FADT "fadt" | |
1da177e4 | 517 | |
4be44fcd | 518 | static int acpi_system_read_info(struct seq_file *seq, void *offset) |
1da177e4 | 519 | { |
1da177e4 LT |
520 | |
521 | seq_printf(seq, "version: %x\n", ACPI_CA_VERSION); | |
d550d98d | 522 | return 0; |
1da177e4 LT |
523 | } |
524 | ||
525 | static int acpi_system_info_open_fs(struct inode *inode, struct file *file) | |
526 | { | |
527 | return single_open(file, acpi_system_read_info, PDE(inode)->data); | |
528 | } | |
529 | ||
d7508032 | 530 | static const struct file_operations acpi_system_info_ops = { |
cf7acfab | 531 | .owner = THIS_MODULE, |
4be44fcd LB |
532 | .open = acpi_system_info_open_fs, |
533 | .read = seq_read, | |
534 | .llseek = seq_lseek, | |
535 | .release = single_release, | |
1da177e4 LT |
536 | }; |
537 | ||
4be44fcd LB |
538 | static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t, |
539 | loff_t *); | |
1da177e4 | 540 | |
d7508032 | 541 | static const struct file_operations acpi_system_dsdt_ops = { |
cf7acfab | 542 | .owner = THIS_MODULE, |
4be44fcd | 543 | .read = acpi_system_read_dsdt, |
1da177e4 LT |
544 | }; |
545 | ||
546 | static ssize_t | |
4be44fcd LB |
547 | acpi_system_read_dsdt(struct file *file, |
548 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 549 | { |
4be44fcd | 550 | acpi_status status = AE_OK; |
ad71860a | 551 | struct acpi_table_header *dsdt = NULL; |
4be44fcd | 552 | ssize_t res; |
1da177e4 | 553 | |
ad71860a | 554 | status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt); |
1da177e4 | 555 | if (ACPI_FAILURE(status)) |
d550d98d | 556 | return -ENODEV; |
1da177e4 | 557 | |
d4c5f047 | 558 | res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length); |
1da177e4 | 559 | |
d550d98d | 560 | return res; |
1da177e4 LT |
561 | } |
562 | ||
4be44fcd LB |
563 | static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t, |
564 | loff_t *); | |
1da177e4 | 565 | |
d7508032 | 566 | static const struct file_operations acpi_system_fadt_ops = { |
cf7acfab | 567 | .owner = THIS_MODULE, |
4be44fcd | 568 | .read = acpi_system_read_fadt, |
1da177e4 LT |
569 | }; |
570 | ||
571 | static ssize_t | |
4be44fcd LB |
572 | acpi_system_read_fadt(struct file *file, |
573 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 574 | { |
4be44fcd | 575 | acpi_status status = AE_OK; |
ad71860a | 576 | struct acpi_table_header *fadt = NULL; |
4be44fcd | 577 | ssize_t res; |
1da177e4 | 578 | |
ad71860a | 579 | status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt); |
1da177e4 | 580 | if (ACPI_FAILURE(status)) |
d550d98d | 581 | return -ENODEV; |
1da177e4 | 582 | |
d4c5f047 | 583 | res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length); |
1da177e4 | 584 | |
d550d98d | 585 | return res; |
1da177e4 LT |
586 | } |
587 | ||
d4c5f047 | 588 | static int acpi_system_procfs_init(void) |
1da177e4 | 589 | { |
4be44fcd | 590 | struct proc_dir_entry *entry; |
1da177e4 | 591 | int error = 0; |
1da177e4 | 592 | |
1da177e4 | 593 | /* 'info' [R] */ |
cf7acfab DL |
594 | entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir, |
595 | &acpi_system_info_ops); | |
1da177e4 LT |
596 | if (!entry) |
597 | goto Error; | |
1da177e4 LT |
598 | |
599 | /* 'dsdt' [R] */ | |
cf7acfab DL |
600 | entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir, |
601 | &acpi_system_dsdt_ops); | |
602 | if (!entry) | |
1da177e4 LT |
603 | goto Error; |
604 | ||
605 | /* 'fadt' [R] */ | |
cf7acfab DL |
606 | entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir, |
607 | &acpi_system_fadt_ops); | |
608 | if (!entry) | |
1da177e4 LT |
609 | goto Error; |
610 | ||
4be44fcd | 611 | Done: |
d550d98d | 612 | return error; |
1da177e4 | 613 | |
4be44fcd | 614 | Error: |
1da177e4 LT |
615 | remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir); |
616 | remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir); | |
617 | remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir); | |
618 | ||
619 | error = -EFAULT; | |
620 | goto Done; | |
621 | } | |
d4c5f047 ZR |
622 | #else |
623 | static int acpi_system_procfs_init(void) | |
624 | { | |
625 | return 0; | |
626 | } | |
627 | #endif | |
628 | ||
629 | static int __init acpi_system_init(void) | |
630 | { | |
631 | int result = 0; | |
632 | ||
633 | if (acpi_disabled) | |
634 | return 0; | |
635 | ||
636 | result = acpi_system_procfs_init(); | |
637 | if (result) | |
638 | return result; | |
639 | ||
640 | result = acpi_system_sysfs_init(); | |
641 | ||
642 | return result; | |
643 | } | |
1da177e4 | 644 | |
1da177e4 | 645 | subsys_initcall(acpi_system_init); |