blob: a206a12da78ab04fc6951a89287a92096689aa18 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Akinobu Mitae108526e2008-07-23 21:26:44 -070029#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <asm/uaccess.h>
31
32#include <acpi/acpi_drivers.h>
33
Len Browna192a952009-07-28 16:45:54 -040034#define PREFIX "ACPI: "
35
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#define _COMPONENT ACPI_SYSTEM_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050037ACPI_MODULE_NAME("system");
Zhang Rui5bb730f2007-01-29 11:02:42 +080038
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#define ACPI_SYSTEM_CLASS "system"
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#define ACPI_SYSTEM_DEVICE_NAME "System"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Len Brown5229e872008-02-06 01:26:55 -050042u32 acpi_irq_handled;
Len Brown88bea182009-04-21 00:35:47 -040043u32 acpi_irq_not_handled;
Len Brown5229e872008-02-06 01:26:55 -050044
Zhang Rui5bb730f2007-01-29 11:02:42 +080045/*
46 * Make ACPICA version work as module param
47 */
Zhang Ruid4c5f042007-06-14 17:43:07 +080048static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
49{
Zhang Rui5bb730f2007-01-29 11:02:42 +080050 int result;
51
52 result = sprintf(buffer, "%x", ACPI_CA_VERSION);
53
54 return result;
55}
56
57module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059/* --------------------------------------------------------------------------
Zhang Ruid4c5f042007-06-14 17:43:07 +080060 FS Interface (/sys)
61 -------------------------------------------------------------------------- */
62static LIST_HEAD(acpi_table_attr_list);
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -040063static struct kobject *tables_kobj;
Zhang Rui4658e4e2009-02-26 11:27:23 +080064static struct kobject *dynamic_tables_kobj;
Zhang Ruid4c5f042007-06-14 17:43:07 +080065
66struct acpi_table_attr {
67 struct bin_attribute attr;
68 char name[8];
69 int instance;
70 struct list_head node;
71};
72
73static 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;
Peter Gruber4feba702008-10-27 23:59:36 -040081 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);
Zhang Ruid4c5f042007-06-14 17:43:07 +080087
88 status =
Peter Gruber4feba702008-10-27 23:59:36 -040089 acpi_get_table(name, table_attr->instance,
Zhang Ruid4c5f042007-06-14 17:43:07 +080090 &table_header);
91 if (ACPI_FAILURE(status))
92 return -ENODEV;
93
Akinobu Mita46a21e42008-06-09 16:22:26 -070094 return memory_read_from_buffer(buf, count, &offset,
95 table_header, table_header->length);
Zhang Ruid4c5f042007-06-14 17:43:07 +080096}
97
98static 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
Peter Gruber4feba702008-10-27 23:59:36 -0400104 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);
Zhang Ruid4c5f042007-06-14 17:43:07 +0800109
110 list_for_each_entry(attr, &acpi_table_attr_list, node) {
Peter Gruber4feba702008-10-27 23:59:36 -0400111 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
Zhang Ruid4c5f042007-06-14 17:43:07 +0800112 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 &&
Peter Gruber4feba702008-10-27 23:59:36 -0400118 !acpi_get_table
119 (table_header->signature, 2, &header)))
120 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
121 table_attr->instance);
Zhang Ruid4c5f042007-06-14 17:43:07 +0800122
123 table_attr->attr.size = 0;
124 table_attr->attr.read = acpi_table_show;
125 table_attr->attr.attr.name = table_attr->name;
Len Brownd0006f32009-07-30 16:00:53 -0400126 table_attr->attr.attr.mode = 0400;
Zhang Ruid4c5f042007-06-14 17:43:07 +0800127
128 return;
129}
130
Zhang Rui4658e4e2009-02-26 11:27:23 +0800131static acpi_status
132acpi_sysfs_table_handler(u32 event, void *table, void *context)
133{
134 struct acpi_table_attr *table_attr;
135
136 switch (event) {
137 case ACPI_TABLE_EVENT_LOAD:
138 table_attr =
139 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
140 if (!table_attr)
141 return AE_NO_MEMORY;
142
143 acpi_table_attr_init(table_attr, table);
144 if (sysfs_create_bin_file(dynamic_tables_kobj,
145 &table_attr->attr)) {
146 kfree(table_attr);
147 return AE_ERROR;
148 } else
149 list_add_tail(&table_attr->node,
150 &acpi_table_attr_list);
151 break;
152 case ACPI_TABLE_EVENT_UNLOAD:
153 /*
154 * we do not need to do anything right now
155 * because the table is not deleted from the
156 * global table list when unloading it.
157 */
158 break;
159 default:
160 return AE_BAD_PARAMETER;
161 }
162 return AE_OK;
163}
164
Zhang Ruid4c5f042007-06-14 17:43:07 +0800165static int acpi_system_sysfs_init(void)
166{
167 struct acpi_table_attr *table_attr;
168 struct acpi_table_header *table_header = NULL;
169 int table_index = 0;
170 int result;
171
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400172 tables_kobj = kobject_create_and_add("tables", acpi_kobj);
173 if (!tables_kobj)
Zhang Rui4658e4e2009-02-26 11:27:23 +0800174 goto err;
175
176 dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
177 if (!dynamic_tables_kobj)
178 goto err_dynamic_tables;
Zhang Ruid4c5f042007-06-14 17:43:07 +0800179
180 do {
181 result = acpi_get_table_by_index(table_index, &table_header);
182 if (!result) {
183 table_index++;
184 table_attr = NULL;
185 table_attr =
186 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
187 if (!table_attr)
188 return -ENOMEM;
189
190 acpi_table_attr_init(table_attr, table_header);
191 result =
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400192 sysfs_create_bin_file(tables_kobj,
Zhang Ruid4c5f042007-06-14 17:43:07 +0800193 &table_attr->attr);
194 if (result) {
195 kfree(table_attr);
196 return result;
197 } else
198 list_add_tail(&table_attr->node,
199 &acpi_table_attr_list);
200 }
201 } while (!result);
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400202 kobject_uevent(tables_kobj, KOBJ_ADD);
Zhang Rui4658e4e2009-02-26 11:27:23 +0800203 kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
204 result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
Zhang Ruid4c5f042007-06-14 17:43:07 +0800205
Zhang Rui4658e4e2009-02-26 11:27:23 +0800206 return result == AE_OK ? 0 : -EINVAL;
207err_dynamic_tables:
208 kobject_put(tables_kobj);
209err:
210 return -ENOMEM;
Zhang Ruid4c5f042007-06-14 17:43:07 +0800211}
212
Len Brown5229e872008-02-06 01:26:55 -0500213/*
214 * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
215 * See Documentation/ABI/testing/sysfs-firmware-acpi
216 */
217
218#define COUNT_GPE 0
219#define COUNT_SCI 1 /* acpi_irq_handled */
Len Brown88bea182009-04-21 00:35:47 -0400220#define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */
221#define COUNT_ERROR 3 /* other */
222#define NUM_COUNTERS_EXTRA 4
Len Brown5229e872008-02-06 01:26:55 -0500223
Zhang Rui71b58cb2008-06-20 09:42:47 +0800224struct event_counter {
225 u32 count;
226 u32 flags;
227};
228
229static struct event_counter *all_counters;
Len Brown5229e872008-02-06 01:26:55 -0500230static u32 num_gpes;
231static u32 num_counters;
232static struct attribute **all_attrs;
233static u32 acpi_gpe_count;
234
235static struct attribute_group interrupt_stats_attr_group = {
236 .name = "interrupts",
237};
238static struct kobj_attribute *counter_attrs;
239
Len Brown5229e872008-02-06 01:26:55 -0500240static void delete_gpe_attr_array(void)
241{
Zhang Rui71b58cb2008-06-20 09:42:47 +0800242 struct event_counter *tmp = all_counters;
Len Brown5229e872008-02-06 01:26:55 -0500243
244 all_counters = NULL;
245 kfree(tmp);
246
247 if (counter_attrs) {
248 int i;
249
250 for (i = 0; i < num_gpes; i++)
251 kfree(counter_attrs[i].attr.name);
252
253 kfree(counter_attrs);
254 }
255 kfree(all_attrs);
256
257 return;
258}
259
260void acpi_os_gpe_count(u32 gpe_number)
261{
262 acpi_gpe_count++;
263
264 if (!all_counters)
265 return;
266
267 if (gpe_number < num_gpes)
Zhang Rui71b58cb2008-06-20 09:42:47 +0800268 all_counters[gpe_number].count++;
Len Brown5229e872008-02-06 01:26:55 -0500269 else
Zhang Rui71b58cb2008-06-20 09:42:47 +0800270 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
271 count++;
Len Brown5229e872008-02-06 01:26:55 -0500272
273 return;
274}
275
276void acpi_os_fixed_event_count(u32 event_number)
277{
278 if (!all_counters)
279 return;
280
281 if (event_number < ACPI_NUM_FIXED_EVENTS)
Zhang Rui71b58cb2008-06-20 09:42:47 +0800282 all_counters[num_gpes + event_number].count++;
Len Brown5229e872008-02-06 01:26:55 -0500283 else
Zhang Rui71b58cb2008-06-20 09:42:47 +0800284 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
285 count++;
Len Brown5229e872008-02-06 01:26:55 -0500286
287 return;
288}
289
Zhang Rui71b58cb2008-06-20 09:42:47 +0800290static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle)
291{
292 int result = 0;
293
294 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
295 goto end;
296
297 if (index < num_gpes) {
Bob Mooree97d6bf2008-12-30 09:45:17 +0800298 result = acpi_get_gpe_device(index, handle);
Zhang Rui71b58cb2008-06-20 09:42:47 +0800299 if (result) {
300 ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
301 "Invalid GPE 0x%x\n", index));
302 goto end;
303 }
304 result = acpi_get_gpe_status(*handle, index,
305 ACPI_NOT_ISR, status);
306 } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
307 result = acpi_get_event_status(index - num_gpes, status);
308
Zhang Rui71b58cb2008-06-20 09:42:47 +0800309end:
310 return result;
311}
312
Len Brown5229e872008-02-06 01:26:55 -0500313static ssize_t counter_show(struct kobject *kobj,
314 struct kobj_attribute *attr, char *buf)
315{
Zhang Rui71b58cb2008-06-20 09:42:47 +0800316 int index = attr - counter_attrs;
317 int size;
318 acpi_handle handle;
319 acpi_event_status status;
320 int result = 0;
321
322 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
Len Brown5229e872008-02-06 01:26:55 -0500323 acpi_irq_handled;
Len Brown88bea182009-04-21 00:35:47 -0400324 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
325 acpi_irq_not_handled;
Zhang Rui71b58cb2008-06-20 09:42:47 +0800326 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
Len Brown5229e872008-02-06 01:26:55 -0500327 acpi_gpe_count;
328
Zhang Rui71b58cb2008-06-20 09:42:47 +0800329 size = sprintf(buf, "%8d", all_counters[index].count);
330
331 /* "gpe_all" or "sci" */
332 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
333 goto end;
334
335 result = get_status(index, &status, &handle);
336 if (result)
337 goto end;
338
Zhang Ruied206fa2008-10-27 14:01:02 -0700339 if (!(status & ACPI_EVENT_FLAG_HANDLE))
340 size += sprintf(buf + size, " invalid");
Zhang Rui71b58cb2008-06-20 09:42:47 +0800341 else if (status & ACPI_EVENT_FLAG_ENABLED)
Zhang Ruied206fa2008-10-27 14:01:02 -0700342 size += sprintf(buf + size, " enabled");
343 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
344 size += sprintf(buf + size, " wake_enabled");
Zhang Rui71b58cb2008-06-20 09:42:47 +0800345 else
Zhang Ruied206fa2008-10-27 14:01:02 -0700346 size += sprintf(buf + size, " disabled");
Zhang Rui71b58cb2008-06-20 09:42:47 +0800347
348end:
349 size += sprintf(buf + size, "\n");
350 return result ? result : size;
Len Brown5229e872008-02-06 01:26:55 -0500351}
352
353/*
354 * counter_set() sets the specified counter.
355 * setting the total "sci" file to any value clears all counters.
Zhang Rui71b58cb2008-06-20 09:42:47 +0800356 * enable/disable/clear a gpe/fixed event in user space.
Len Brown5229e872008-02-06 01:26:55 -0500357 */
358static ssize_t counter_set(struct kobject *kobj,
359 struct kobj_attribute *attr, const char *buf, size_t size)
360{
361 int index = attr - counter_attrs;
Zhang Rui71b58cb2008-06-20 09:42:47 +0800362 acpi_event_status status;
363 acpi_handle handle;
364 int result = 0;
Len Brown5229e872008-02-06 01:26:55 -0500365
366 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
367 int i;
368 for (i = 0; i < num_counters; ++i)
Zhang Rui71b58cb2008-06-20 09:42:47 +0800369 all_counters[i].count = 0;
Len Brown5229e872008-02-06 01:26:55 -0500370 acpi_gpe_count = 0;
371 acpi_irq_handled = 0;
Len Brown88bea182009-04-21 00:35:47 -0400372 acpi_irq_not_handled = 0;
Zhang Rui71b58cb2008-06-20 09:42:47 +0800373 goto end;
374 }
Len Brown5229e872008-02-06 01:26:55 -0500375
Zhang Rui71b58cb2008-06-20 09:42:47 +0800376 /* show the event status for both GPEs and Fixed Events */
377 result = get_status(index, &status, &handle);
378 if (result)
379 goto end;
380
Zhang Ruied206fa2008-10-27 14:01:02 -0700381 if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
Lin Ming55ac9a02008-09-28 14:51:56 +0800382 printk(KERN_WARNING PREFIX
383 "Can not change Invalid GPE/Fixed Event status\n");
Zhang Rui71b58cb2008-06-20 09:42:47 +0800384 return -EINVAL;
385 }
386
387 if (index < num_gpes) {
388 if (!strcmp(buf, "disable\n") &&
389 (status & ACPI_EVENT_FLAG_ENABLED))
Rafael J. Wysocki9630bdd2010-02-17 23:41:07 +0100390 result = acpi_set_gpe(handle, index, ACPI_GPE_DISABLE);
Zhang Rui71b58cb2008-06-20 09:42:47 +0800391 else if (!strcmp(buf, "enable\n") &&
392 !(status & ACPI_EVENT_FLAG_ENABLED))
Rafael J. Wysocki9630bdd2010-02-17 23:41:07 +0100393 result = acpi_set_gpe(handle, index, ACPI_GPE_ENABLE);
Zhang Rui71b58cb2008-06-20 09:42:47 +0800394 else if (!strcmp(buf, "clear\n") &&
395 (status & ACPI_EVENT_FLAG_SET))
396 result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR);
397 else
398 all_counters[index].count = strtoul(buf, NULL, 0);
399 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
400 int event = index - num_gpes;
401 if (!strcmp(buf, "disable\n") &&
402 (status & ACPI_EVENT_FLAG_ENABLED))
403 result = acpi_disable_event(event, ACPI_NOT_ISR);
404 else if (!strcmp(buf, "enable\n") &&
405 !(status & ACPI_EVENT_FLAG_ENABLED))
406 result = acpi_enable_event(event, ACPI_NOT_ISR);
407 else if (!strcmp(buf, "clear\n") &&
408 (status & ACPI_EVENT_FLAG_SET))
409 result = acpi_clear_event(event);
410 else
411 all_counters[index].count = strtoul(buf, NULL, 0);
Len Brown5229e872008-02-06 01:26:55 -0500412 } else
Zhang Rui71b58cb2008-06-20 09:42:47 +0800413 all_counters[index].count = strtoul(buf, NULL, 0);
Len Brown5229e872008-02-06 01:26:55 -0500414
Zhang Rui71b58cb2008-06-20 09:42:47 +0800415 if (ACPI_FAILURE(result))
416 result = -EINVAL;
417end:
418 return result ? result : size;
Len Brown5229e872008-02-06 01:26:55 -0500419}
420
421void acpi_irq_stats_init(void)
422{
423 int i;
424
425 if (all_counters)
426 return;
427
Bob Mooree97d6bf2008-12-30 09:45:17 +0800428 num_gpes = acpi_current_gpe_count;
Len Brown5229e872008-02-06 01:26:55 -0500429 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
430
431 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
432 GFP_KERNEL);
433 if (all_attrs == NULL)
434 return;
435
Zhang Rui71b58cb2008-06-20 09:42:47 +0800436 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
437 GFP_KERNEL);
Len Brown5229e872008-02-06 01:26:55 -0500438 if (all_counters == NULL)
439 goto fail;
440
441 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
442 GFP_KERNEL);
443 if (counter_attrs == NULL)
444 goto fail;
445
446 for (i = 0; i < num_counters; ++i) {
Johann Felix Sodenc8dc9de2008-03-11 16:44:26 +0100447 char buffer[12];
Len Brown5229e872008-02-06 01:26:55 -0500448 char *name;
449
450 if (i < num_gpes)
451 sprintf(buffer, "gpe%02X", i);
452 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
453 sprintf(buffer, "ff_pmtimer");
454 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
455 sprintf(buffer, "ff_gbl_lock");
456 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
457 sprintf(buffer, "ff_pwr_btn");
458 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
459 sprintf(buffer, "ff_slp_btn");
460 else if (i == num_gpes + ACPI_EVENT_RTC)
461 sprintf(buffer, "ff_rt_clk");
462 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
463 sprintf(buffer, "gpe_all");
464 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
465 sprintf(buffer, "sci");
Len Brown88bea182009-04-21 00:35:47 -0400466 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
467 sprintf(buffer, "sci_not");
Len Brown5229e872008-02-06 01:26:55 -0500468 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
469 sprintf(buffer, "error");
470 else
471 sprintf(buffer, "bug%02X", i);
472
473 name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
474 if (name == NULL)
475 goto fail;
476 strncpy(name, buffer, strlen(buffer) + 1);
477
478 counter_attrs[i].attr.name = name;
479 counter_attrs[i].attr.mode = 0644;
480 counter_attrs[i].show = counter_show;
481 counter_attrs[i].store = counter_set;
482
483 all_attrs[i] = &counter_attrs[i].attr;
484 }
485
486 interrupt_stats_attr_group.attrs = all_attrs;
Len Brownb7143152008-02-07 04:24:01 -0500487 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
488 return;
Len Brown5229e872008-02-06 01:26:55 -0500489
490fail:
491 delete_gpe_attr_array();
492 return;
493}
494
495static void __exit interrupt_stats_exit(void)
496{
497 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
498
499 delete_gpe_attr_array();
500
501 return;
502}
503
Zhang Ruid4c5f042007-06-14 17:43:07 +0800504/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 FS Interface (/proc)
506 -------------------------------------------------------------------------- */
Zhang Rui5bb730f2007-01-29 11:02:42 +0800507#ifdef CONFIG_ACPI_PROCFS
Zhang Ruid4c5f042007-06-14 17:43:07 +0800508#define ACPI_SYSTEM_FILE_INFO "info"
509#define ACPI_SYSTEM_FILE_EVENT "event"
510#define ACPI_SYSTEM_FILE_DSDT "dsdt"
511#define ACPI_SYSTEM_FILE_FADT "fadt"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
Len Brown4be44fc2005-08-05 00:44:28 -0400513static int acpi_system_read_info(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
516 seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
Patrick Mocheld550d982006-06-27 00:41:40 -0400517 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518}
519
520static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
521{
522 return single_open(file, acpi_system_read_info, PDE(inode)->data);
523}
524
Arjan van de Vend7508032006-07-04 13:06:00 -0400525static const struct file_operations acpi_system_info_ops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700526 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400527 .open = acpi_system_info_open_fs,
528 .read = seq_read,
529 .llseek = seq_lseek,
530 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531};
532
Len Brown4be44fc2005-08-05 00:44:28 -0400533static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
534 loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535
Arjan van de Vend7508032006-07-04 13:06:00 -0400536static const struct file_operations acpi_system_dsdt_ops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700537 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400538 .read = acpi_system_read_dsdt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539};
540
541static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -0400542acpi_system_read_dsdt(struct file *file,
543 char __user * buffer, size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544{
Len Brown4be44fc2005-08-05 00:44:28 -0400545 acpi_status status = AE_OK;
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300546 struct acpi_table_header *dsdt = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400547 ssize_t res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300549 status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400551 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
Zhang Ruid4c5f042007-06-14 17:43:07 +0800553 res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554
Patrick Mocheld550d982006-06-27 00:41:40 -0400555 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556}
557
Len Brown4be44fc2005-08-05 00:44:28 -0400558static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
559 loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Arjan van de Vend7508032006-07-04 13:06:00 -0400561static const struct file_operations acpi_system_fadt_ops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700562 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400563 .read = acpi_system_read_fadt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564};
565
566static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -0400567acpi_system_read_fadt(struct file *file,
568 char __user * buffer, size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569{
Len Brown4be44fc2005-08-05 00:44:28 -0400570 acpi_status status = AE_OK;
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300571 struct acpi_table_header *fadt = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400572 ssize_t res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300574 status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400576 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Zhang Ruid4c5f042007-06-14 17:43:07 +0800578 res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Patrick Mocheld550d982006-06-27 00:41:40 -0400580 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581}
582
Zhang Ruid4c5f042007-06-14 17:43:07 +0800583static int acpi_system_procfs_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584{
Len Brown4be44fc2005-08-05 00:44:28 -0400585 struct proc_dir_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 /* 'info' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700589 entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir,
590 &acpi_system_info_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 if (!entry)
592 goto Error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593
594 /* 'dsdt' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700595 entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir,
596 &acpi_system_dsdt_ops);
597 if (!entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 goto Error;
599
600 /* 'fadt' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700601 entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir,
602 &acpi_system_fadt_ops);
603 if (!entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 goto Error;
605
Len Brown4be44fc2005-08-05 00:44:28 -0400606 Done:
Patrick Mocheld550d982006-06-27 00:41:40 -0400607 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
Len Brown4be44fc2005-08-05 00:44:28 -0400609 Error:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
611 remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
612 remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
613
614 error = -EFAULT;
615 goto Done;
616}
Zhang Ruid4c5f042007-06-14 17:43:07 +0800617#else
618static int acpi_system_procfs_init(void)
619{
620 return 0;
621}
622#endif
623
Bjorn Helgaas141a0af2009-03-24 16:49:58 -0600624int __init acpi_system_init(void)
Zhang Ruid4c5f042007-06-14 17:43:07 +0800625{
Bjorn Helgaas141a0af2009-03-24 16:49:58 -0600626 int result;
Zhang Ruid4c5f042007-06-14 17:43:07 +0800627
628 result = acpi_system_procfs_init();
629 if (result)
630 return result;
631
632 result = acpi_system_sysfs_init();
633
634 return result;
635}