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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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090028#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/init.h>
Akinobu Mitae108526e2008-07-23 21:26:44 -070030#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <asm/uaccess.h>
32
33#include <acpi/acpi_drivers.h>
34
Len Browna192a952009-07-28 16:45:54 -040035#define PREFIX "ACPI: "
36
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#define _COMPONENT ACPI_SYSTEM_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050038ACPI_MODULE_NAME("system");
Zhang Rui5bb730f2007-01-29 11:02:42 +080039
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#define ACPI_SYSTEM_CLASS "system"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#define ACPI_SYSTEM_DEVICE_NAME "System"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Len Brown5229e872008-02-06 01:26:55 -050043u32 acpi_irq_handled;
Len Brown88bea182009-04-21 00:35:47 -040044u32 acpi_irq_not_handled;
Len Brown5229e872008-02-06 01:26:55 -050045
Zhang Rui5bb730f2007-01-29 11:02:42 +080046/*
47 * Make ACPICA version work as module param
48 */
Zhang Ruid4c5f042007-06-14 17:43:07 +080049static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
50{
Zhang Rui5bb730f2007-01-29 11:02:42 +080051 int result;
52
53 result = sprintf(buffer, "%x", ACPI_CA_VERSION);
54
55 return result;
56}
57
58module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
59
Linus Torvalds1da177e2005-04-16 15:20:36 -070060/* --------------------------------------------------------------------------
Zhang Ruid4c5f042007-06-14 17:43:07 +080061 FS Interface (/sys)
62 -------------------------------------------------------------------------- */
63static LIST_HEAD(acpi_table_attr_list);
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -040064static struct kobject *tables_kobj;
Zhang Rui4658e4e2009-02-26 11:27:23 +080065static struct kobject *dynamic_tables_kobj;
Zhang Ruid4c5f042007-06-14 17:43:07 +080066
67struct acpi_table_attr {
68 struct bin_attribute attr;
69 char name[8];
70 int instance;
71 struct list_head node;
72};
73
Chris Wright2c3c8be2010-05-12 18:28:57 -070074static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
Zhang Ruid4c5f042007-06-14 17:43:07 +080075 struct bin_attribute *bin_attr, char *buf,
76 loff_t offset, size_t count)
77{
78 struct acpi_table_attr *table_attr =
79 container_of(bin_attr, struct acpi_table_attr, attr);
80 struct acpi_table_header *table_header = NULL;
81 acpi_status status;
Peter Gruber4feba702008-10-27 23:59:36 -040082 char name[ACPI_NAME_SIZE];
83
84 if (strncmp(table_attr->name, "NULL", 4))
85 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
86 else
87 memcpy(name, "\0\0\0\0", 4);
Zhang Ruid4c5f042007-06-14 17:43:07 +080088
89 status =
Peter Gruber4feba702008-10-27 23:59:36 -040090 acpi_get_table(name, table_attr->instance,
Zhang Ruid4c5f042007-06-14 17:43:07 +080091 &table_header);
92 if (ACPI_FAILURE(status))
93 return -ENODEV;
94
Akinobu Mita46a21e42008-06-09 16:22:26 -070095 return memory_read_from_buffer(buf, count, &offset,
96 table_header, table_header->length);
Zhang Ruid4c5f042007-06-14 17:43:07 +080097}
98
99static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
100 struct acpi_table_header *table_header)
101{
102 struct acpi_table_header *header = NULL;
103 struct acpi_table_attr *attr = NULL;
104
Eric W. Biedermana07e4152010-02-11 15:23:05 -0800105 sysfs_attr_init(&table_attr->attr.attr);
Peter Gruber4feba702008-10-27 23:59:36 -0400106 if (table_header->signature[0] != '\0')
107 memcpy(table_attr->name, table_header->signature,
108 ACPI_NAME_SIZE);
109 else
110 memcpy(table_attr->name, "NULL", 4);
Zhang Ruid4c5f042007-06-14 17:43:07 +0800111
112 list_for_each_entry(attr, &acpi_table_attr_list, node) {
Peter Gruber4feba702008-10-27 23:59:36 -0400113 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
Zhang Ruid4c5f042007-06-14 17:43:07 +0800114 if (table_attr->instance < attr->instance)
115 table_attr->instance = attr->instance;
116 }
117 table_attr->instance++;
118
119 if (table_attr->instance > 1 || (table_attr->instance == 1 &&
Peter Gruber4feba702008-10-27 23:59:36 -0400120 !acpi_get_table
121 (table_header->signature, 2, &header)))
122 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
123 table_attr->instance);
Zhang Ruid4c5f042007-06-14 17:43:07 +0800124
125 table_attr->attr.size = 0;
126 table_attr->attr.read = acpi_table_show;
127 table_attr->attr.attr.name = table_attr->name;
Len Brownd0006f32009-07-30 16:00:53 -0400128 table_attr->attr.attr.mode = 0400;
Zhang Ruid4c5f042007-06-14 17:43:07 +0800129
130 return;
131}
132
Zhang Rui4658e4e2009-02-26 11:27:23 +0800133static acpi_status
134acpi_sysfs_table_handler(u32 event, void *table, void *context)
135{
136 struct acpi_table_attr *table_attr;
137
138 switch (event) {
139 case ACPI_TABLE_EVENT_LOAD:
140 table_attr =
141 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
142 if (!table_attr)
143 return AE_NO_MEMORY;
144
145 acpi_table_attr_init(table_attr, table);
146 if (sysfs_create_bin_file(dynamic_tables_kobj,
147 &table_attr->attr)) {
148 kfree(table_attr);
149 return AE_ERROR;
150 } else
151 list_add_tail(&table_attr->node,
152 &acpi_table_attr_list);
153 break;
154 case ACPI_TABLE_EVENT_UNLOAD:
155 /*
156 * we do not need to do anything right now
157 * because the table is not deleted from the
158 * global table list when unloading it.
159 */
160 break;
161 default:
162 return AE_BAD_PARAMETER;
163 }
164 return AE_OK;
165}
166
Zhang Ruid4c5f042007-06-14 17:43:07 +0800167static int acpi_system_sysfs_init(void)
168{
169 struct acpi_table_attr *table_attr;
170 struct acpi_table_header *table_header = NULL;
171 int table_index = 0;
172 int result;
173
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400174 tables_kobj = kobject_create_and_add("tables", acpi_kobj);
175 if (!tables_kobj)
Zhang Rui4658e4e2009-02-26 11:27:23 +0800176 goto err;
177
178 dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
179 if (!dynamic_tables_kobj)
180 goto err_dynamic_tables;
Zhang Ruid4c5f042007-06-14 17:43:07 +0800181
182 do {
183 result = acpi_get_table_by_index(table_index, &table_header);
184 if (!result) {
185 table_index++;
186 table_attr = NULL;
187 table_attr =
188 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
189 if (!table_attr)
190 return -ENOMEM;
191
192 acpi_table_attr_init(table_attr, table_header);
193 result =
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400194 sysfs_create_bin_file(tables_kobj,
Zhang Ruid4c5f042007-06-14 17:43:07 +0800195 &table_attr->attr);
196 if (result) {
197 kfree(table_attr);
198 return result;
199 } else
200 list_add_tail(&table_attr->node,
201 &acpi_table_attr_list);
202 }
203 } while (!result);
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400204 kobject_uevent(tables_kobj, KOBJ_ADD);
Zhang Rui4658e4e2009-02-26 11:27:23 +0800205 kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
206 result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
Zhang Ruid4c5f042007-06-14 17:43:07 +0800207
Zhang Rui4658e4e2009-02-26 11:27:23 +0800208 return result == AE_OK ? 0 : -EINVAL;
209err_dynamic_tables:
210 kobject_put(tables_kobj);
211err:
212 return -ENOMEM;
Zhang Ruid4c5f042007-06-14 17:43:07 +0800213}
214
Len Brown5229e872008-02-06 01:26:55 -0500215/*
216 * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
217 * See Documentation/ABI/testing/sysfs-firmware-acpi
218 */
219
220#define COUNT_GPE 0
221#define COUNT_SCI 1 /* acpi_irq_handled */
Len Brown88bea182009-04-21 00:35:47 -0400222#define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */
223#define COUNT_ERROR 3 /* other */
224#define NUM_COUNTERS_EXTRA 4
Len Brown5229e872008-02-06 01:26:55 -0500225
Zhang Rui71b58cb2008-06-20 09:42:47 +0800226struct event_counter {
227 u32 count;
228 u32 flags;
229};
230
231static struct event_counter *all_counters;
Len Brown5229e872008-02-06 01:26:55 -0500232static u32 num_gpes;
233static u32 num_counters;
234static struct attribute **all_attrs;
235static u32 acpi_gpe_count;
236
237static struct attribute_group interrupt_stats_attr_group = {
238 .name = "interrupts",
239};
240static struct kobj_attribute *counter_attrs;
241
Len Brown5229e872008-02-06 01:26:55 -0500242static void delete_gpe_attr_array(void)
243{
Zhang Rui71b58cb2008-06-20 09:42:47 +0800244 struct event_counter *tmp = all_counters;
Len Brown5229e872008-02-06 01:26:55 -0500245
246 all_counters = NULL;
247 kfree(tmp);
248
249 if (counter_attrs) {
250 int i;
251
252 for (i = 0; i < num_gpes; i++)
253 kfree(counter_attrs[i].attr.name);
254
255 kfree(counter_attrs);
256 }
257 kfree(all_attrs);
258
259 return;
260}
261
262void acpi_os_gpe_count(u32 gpe_number)
263{
264 acpi_gpe_count++;
265
266 if (!all_counters)
267 return;
268
269 if (gpe_number < num_gpes)
Zhang Rui71b58cb2008-06-20 09:42:47 +0800270 all_counters[gpe_number].count++;
Len Brown5229e872008-02-06 01:26:55 -0500271 else
Zhang Rui71b58cb2008-06-20 09:42:47 +0800272 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
273 count++;
Len Brown5229e872008-02-06 01:26:55 -0500274
275 return;
276}
277
278void acpi_os_fixed_event_count(u32 event_number)
279{
280 if (!all_counters)
281 return;
282
283 if (event_number < ACPI_NUM_FIXED_EVENTS)
Zhang Rui71b58cb2008-06-20 09:42:47 +0800284 all_counters[num_gpes + event_number].count++;
Len Brown5229e872008-02-06 01:26:55 -0500285 else
Zhang Rui71b58cb2008-06-20 09:42:47 +0800286 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
287 count++;
Len Brown5229e872008-02-06 01:26:55 -0500288
289 return;
290}
291
Zhang Rui71b58cb2008-06-20 09:42:47 +0800292static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle)
293{
294 int result = 0;
295
296 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
297 goto end;
298
299 if (index < num_gpes) {
Bob Mooree97d6bf2008-12-30 09:45:17 +0800300 result = acpi_get_gpe_device(index, handle);
Zhang Rui71b58cb2008-06-20 09:42:47 +0800301 if (result) {
302 ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
303 "Invalid GPE 0x%x\n", index));
304 goto end;
305 }
Lin Ming0f849d22010-04-06 14:52:37 +0800306 result = acpi_get_gpe_status(*handle, index, status);
Zhang Rui71b58cb2008-06-20 09:42:47 +0800307 } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
308 result = acpi_get_event_status(index - num_gpes, status);
309
Zhang Rui71b58cb2008-06-20 09:42:47 +0800310end:
311 return result;
312}
313
Len Brown5229e872008-02-06 01:26:55 -0500314static ssize_t counter_show(struct kobject *kobj,
315 struct kobj_attribute *attr, char *buf)
316{
Zhang Rui71b58cb2008-06-20 09:42:47 +0800317 int index = attr - counter_attrs;
318 int size;
319 acpi_handle handle;
320 acpi_event_status status;
321 int result = 0;
322
323 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
Len Brown5229e872008-02-06 01:26:55 -0500324 acpi_irq_handled;
Len Brown88bea182009-04-21 00:35:47 -0400325 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
326 acpi_irq_not_handled;
Zhang Rui71b58cb2008-06-20 09:42:47 +0800327 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
Len Brown5229e872008-02-06 01:26:55 -0500328 acpi_gpe_count;
329
Zhang Rui71b58cb2008-06-20 09:42:47 +0800330 size = sprintf(buf, "%8d", all_counters[index].count);
331
332 /* "gpe_all" or "sci" */
333 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
334 goto end;
335
336 result = get_status(index, &status, &handle);
337 if (result)
338 goto end;
339
Zhang Ruied206fa2008-10-27 14:01:02 -0700340 if (!(status & ACPI_EVENT_FLAG_HANDLE))
341 size += sprintf(buf + size, " invalid");
Zhang Rui71b58cb2008-06-20 09:42:47 +0800342 else if (status & ACPI_EVENT_FLAG_ENABLED)
Zhang Ruied206fa2008-10-27 14:01:02 -0700343 size += sprintf(buf + size, " enabled");
344 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
345 size += sprintf(buf + size, " wake_enabled");
Zhang Rui71b58cb2008-06-20 09:42:47 +0800346 else
Zhang Ruied206fa2008-10-27 14:01:02 -0700347 size += sprintf(buf + size, " disabled");
Zhang Rui71b58cb2008-06-20 09:42:47 +0800348
349end:
350 size += sprintf(buf + size, "\n");
351 return result ? result : size;
Len Brown5229e872008-02-06 01:26:55 -0500352}
353
354/*
355 * counter_set() sets the specified counter.
356 * setting the total "sci" file to any value clears all counters.
Zhang Rui71b58cb2008-06-20 09:42:47 +0800357 * enable/disable/clear a gpe/fixed event in user space.
Len Brown5229e872008-02-06 01:26:55 -0500358 */
359static ssize_t counter_set(struct kobject *kobj,
360 struct kobj_attribute *attr, const char *buf, size_t size)
361{
362 int index = attr - counter_attrs;
Zhang Rui71b58cb2008-06-20 09:42:47 +0800363 acpi_event_status status;
364 acpi_handle handle;
365 int result = 0;
Len Brown5229e872008-02-06 01:26:55 -0500366
367 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
368 int i;
369 for (i = 0; i < num_counters; ++i)
Zhang Rui71b58cb2008-06-20 09:42:47 +0800370 all_counters[i].count = 0;
Len Brown5229e872008-02-06 01:26:55 -0500371 acpi_gpe_count = 0;
372 acpi_irq_handled = 0;
Len Brown88bea182009-04-21 00:35:47 -0400373 acpi_irq_not_handled = 0;
Zhang Rui71b58cb2008-06-20 09:42:47 +0800374 goto end;
375 }
Len Brown5229e872008-02-06 01:26:55 -0500376
Zhang Rui71b58cb2008-06-20 09:42:47 +0800377 /* show the event status for both GPEs and Fixed Events */
378 result = get_status(index, &status, &handle);
379 if (result)
380 goto end;
381
Zhang Ruied206fa2008-10-27 14:01:02 -0700382 if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
Lin Ming55ac9a02008-09-28 14:51:56 +0800383 printk(KERN_WARNING PREFIX
384 "Can not change Invalid GPE/Fixed Event status\n");
Zhang Rui71b58cb2008-06-20 09:42:47 +0800385 return -EINVAL;
386 }
387
388 if (index < num_gpes) {
389 if (!strcmp(buf, "disable\n") &&
390 (status & ACPI_EVENT_FLAG_ENABLED))
Rafael J. Wysocki9d3c752d2010-06-08 10:50:53 +0200391 result = acpi_disable_gpe(handle, index,
392 ACPI_GPE_TYPE_RUNTIME);
Zhang Rui71b58cb2008-06-20 09:42:47 +0800393 else if (!strcmp(buf, "enable\n") &&
394 !(status & ACPI_EVENT_FLAG_ENABLED))
Rafael J. Wysocki9d3c752d2010-06-08 10:50:53 +0200395 result = acpi_enable_gpe(handle, index,
396 ACPI_GPE_TYPE_RUNTIME);
Zhang Rui71b58cb2008-06-20 09:42:47 +0800397 else if (!strcmp(buf, "clear\n") &&
398 (status & ACPI_EVENT_FLAG_SET))
Lin Ming0f849d22010-04-06 14:52:37 +0800399 result = acpi_clear_gpe(handle, index);
Zhang Rui71b58cb2008-06-20 09:42:47 +0800400 else
401 all_counters[index].count = strtoul(buf, NULL, 0);
402 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
403 int event = index - num_gpes;
404 if (!strcmp(buf, "disable\n") &&
405 (status & ACPI_EVENT_FLAG_ENABLED))
406 result = acpi_disable_event(event, ACPI_NOT_ISR);
407 else if (!strcmp(buf, "enable\n") &&
408 !(status & ACPI_EVENT_FLAG_ENABLED))
409 result = acpi_enable_event(event, ACPI_NOT_ISR);
410 else if (!strcmp(buf, "clear\n") &&
411 (status & ACPI_EVENT_FLAG_SET))
412 result = acpi_clear_event(event);
413 else
414 all_counters[index].count = strtoul(buf, NULL, 0);
Len Brown5229e872008-02-06 01:26:55 -0500415 } else
Zhang Rui71b58cb2008-06-20 09:42:47 +0800416 all_counters[index].count = strtoul(buf, NULL, 0);
Len Brown5229e872008-02-06 01:26:55 -0500417
Zhang Rui71b58cb2008-06-20 09:42:47 +0800418 if (ACPI_FAILURE(result))
419 result = -EINVAL;
420end:
421 return result ? result : size;
Len Brown5229e872008-02-06 01:26:55 -0500422}
423
424void acpi_irq_stats_init(void)
425{
426 int i;
427
428 if (all_counters)
429 return;
430
Bob Mooree97d6bf2008-12-30 09:45:17 +0800431 num_gpes = acpi_current_gpe_count;
Len Brown5229e872008-02-06 01:26:55 -0500432 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
433
434 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
435 GFP_KERNEL);
436 if (all_attrs == NULL)
437 return;
438
Zhang Rui71b58cb2008-06-20 09:42:47 +0800439 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
440 GFP_KERNEL);
Len Brown5229e872008-02-06 01:26:55 -0500441 if (all_counters == NULL)
442 goto fail;
443
444 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
445 GFP_KERNEL);
446 if (counter_attrs == NULL)
447 goto fail;
448
449 for (i = 0; i < num_counters; ++i) {
Johann Felix Sodenc8dc9de2008-03-11 16:44:26 +0100450 char buffer[12];
Len Brown5229e872008-02-06 01:26:55 -0500451 char *name;
452
453 if (i < num_gpes)
454 sprintf(buffer, "gpe%02X", i);
455 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
456 sprintf(buffer, "ff_pmtimer");
457 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
458 sprintf(buffer, "ff_gbl_lock");
459 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
460 sprintf(buffer, "ff_pwr_btn");
461 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
462 sprintf(buffer, "ff_slp_btn");
463 else if (i == num_gpes + ACPI_EVENT_RTC)
464 sprintf(buffer, "ff_rt_clk");
465 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
466 sprintf(buffer, "gpe_all");
467 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
468 sprintf(buffer, "sci");
Len Brown88bea182009-04-21 00:35:47 -0400469 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
470 sprintf(buffer, "sci_not");
Len Brown5229e872008-02-06 01:26:55 -0500471 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
472 sprintf(buffer, "error");
473 else
474 sprintf(buffer, "bug%02X", i);
475
476 name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
477 if (name == NULL)
478 goto fail;
479 strncpy(name, buffer, strlen(buffer) + 1);
480
Eric W. Biedermana07e4152010-02-11 15:23:05 -0800481 sysfs_attr_init(&counter_attrs[i].attr);
Len Brown5229e872008-02-06 01:26:55 -0500482 counter_attrs[i].attr.name = name;
483 counter_attrs[i].attr.mode = 0644;
484 counter_attrs[i].show = counter_show;
485 counter_attrs[i].store = counter_set;
486
487 all_attrs[i] = &counter_attrs[i].attr;
488 }
489
490 interrupt_stats_attr_group.attrs = all_attrs;
Len Brownb7143152008-02-07 04:24:01 -0500491 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
492 return;
Len Brown5229e872008-02-06 01:26:55 -0500493
494fail:
495 delete_gpe_attr_array();
496 return;
497}
498
499static void __exit interrupt_stats_exit(void)
500{
501 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
502
503 delete_gpe_attr_array();
504
505 return;
506}
507
Zhang Ruid4c5f042007-06-14 17:43:07 +0800508/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 FS Interface (/proc)
510 -------------------------------------------------------------------------- */
Zhang Rui5bb730f2007-01-29 11:02:42 +0800511#ifdef CONFIG_ACPI_PROCFS
Zhang Ruid4c5f042007-06-14 17:43:07 +0800512#define ACPI_SYSTEM_FILE_INFO "info"
513#define ACPI_SYSTEM_FILE_EVENT "event"
514#define ACPI_SYSTEM_FILE_DSDT "dsdt"
515#define ACPI_SYSTEM_FILE_FADT "fadt"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
Len Brown4be44fc2005-08-05 00:44:28 -0400517static int acpi_system_read_info(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
520 seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
Patrick Mocheld550d982006-06-27 00:41:40 -0400521 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522}
523
524static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
525{
526 return single_open(file, acpi_system_read_info, PDE(inode)->data);
527}
528
Arjan van de Vend7508032006-07-04 13:06:00 -0400529static const struct file_operations acpi_system_info_ops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700530 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400531 .open = acpi_system_info_open_fs,
532 .read = seq_read,
533 .llseek = seq_lseek,
534 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535};
536
Len Brown4be44fc2005-08-05 00:44:28 -0400537static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
538 loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539
Arjan van de Vend7508032006-07-04 13:06:00 -0400540static const struct file_operations acpi_system_dsdt_ops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700541 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400542 .read = acpi_system_read_dsdt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543};
544
545static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -0400546acpi_system_read_dsdt(struct file *file,
547 char __user * buffer, size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548{
Len Brown4be44fc2005-08-05 00:44:28 -0400549 acpi_status status = AE_OK;
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300550 struct acpi_table_header *dsdt = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400551 ssize_t res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300553 status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400555 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
Zhang Ruid4c5f042007-06-14 17:43:07 +0800557 res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
Patrick Mocheld550d982006-06-27 00:41:40 -0400559 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560}
561
Len Brown4be44fc2005-08-05 00:44:28 -0400562static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
563 loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
Arjan van de Vend7508032006-07-04 13:06:00 -0400565static const struct file_operations acpi_system_fadt_ops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700566 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400567 .read = acpi_system_read_fadt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568};
569
570static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -0400571acpi_system_read_fadt(struct file *file,
572 char __user * buffer, size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573{
Len Brown4be44fc2005-08-05 00:44:28 -0400574 acpi_status status = AE_OK;
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300575 struct acpi_table_header *fadt = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400576 ssize_t res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300578 status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400580 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
Zhang Ruid4c5f042007-06-14 17:43:07 +0800582 res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
Patrick Mocheld550d982006-06-27 00:41:40 -0400584 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585}
586
Zhang Ruid4c5f042007-06-14 17:43:07 +0800587static int acpi_system_procfs_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588{
Len Brown4be44fc2005-08-05 00:44:28 -0400589 struct proc_dir_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 /* 'info' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700593 entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir,
594 &acpi_system_info_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 if (!entry)
596 goto Error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597
598 /* 'dsdt' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700599 entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir,
600 &acpi_system_dsdt_ops);
601 if (!entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 goto Error;
603
604 /* 'fadt' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700605 entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir,
606 &acpi_system_fadt_ops);
607 if (!entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 goto Error;
609
Len Brown4be44fc2005-08-05 00:44:28 -0400610 Done:
Patrick Mocheld550d982006-06-27 00:41:40 -0400611 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
Len Brown4be44fc2005-08-05 00:44:28 -0400613 Error:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
615 remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
616 remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
617
618 error = -EFAULT;
619 goto Done;
620}
Zhang Ruid4c5f042007-06-14 17:43:07 +0800621#else
622static int acpi_system_procfs_init(void)
623{
624 return 0;
625}
626#endif
627
Bjorn Helgaas141a0af2009-03-24 16:49:58 -0600628int __init acpi_system_init(void)
Zhang Ruid4c5f042007-06-14 17:43:07 +0800629{
Bjorn Helgaas141a0af2009-03-24 16:49:58 -0600630 int result;
Zhang Ruid4c5f042007-06-14 17:43:07 +0800631
632 result = acpi_system_procfs_init();
633 if (result)
634 return result;
635
636 result = acpi_system_sysfs_init();
637
638 return result;
639}