blob: 1d74171b7940ff3e1975cf9f071069666ebed303 [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
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#define _COMPONENT ACPI_SYSTEM_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050035ACPI_MODULE_NAME("system");
Zhang Rui5bb730f2007-01-29 11:02:42 +080036#ifdef MODULE_PARAM_PREFIX
37#undef MODULE_PARAM_PREFIX
38#endif
39#define MODULE_PARAM_PREFIX "acpi."
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#define ACPI_SYSTEM_CLASS "system"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#define ACPI_SYSTEM_DEVICE_NAME "System"
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Len Brown5229e872008-02-06 01:26:55 -050044u32 acpi_irq_handled;
45
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 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;
Zhang Ruid4c5f042007-06-14 17:43:07 +080081
82 status =
83 acpi_get_table(table_attr->name, table_attr->instance,
84 &table_header);
85 if (ACPI_FAILURE(status))
86 return -ENODEV;
87
Akinobu Mita46a21e42008-06-09 16:22:26 -070088 return memory_read_from_buffer(buf, count, &offset,
89 table_header, table_header->length);
Zhang Ruid4c5f042007-06-14 17:43:07 +080090}
91
92static 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;
Zhang Ruid4c5f042007-06-14 17:43:07 +0800118
119 return;
120}
121
122static 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
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400129 tables_kobj = kobject_create_and_add("tables", acpi_kobj);
130 if (!tables_kobj)
131 return -ENOMEM;
Zhang Ruid4c5f042007-06-14 17:43:07 +0800132
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 =
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400145 sysfs_create_bin_file(tables_kobj,
Zhang Ruid4c5f042007-06-14 17:43:07 +0800146 &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);
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400155 kobject_uevent(tables_kobj, KOBJ_ADD);
Zhang Ruid4c5f042007-06-14 17:43:07 +0800156
157 return 0;
158}
159
Len Brown5229e872008-02-06 01:26:55 -0500160/*
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
Zhang Rui71b58cb2008-06-20 09:42:47 +0800170#define ACPI_EVENT_VALID 0x01
171struct event_counter {
172 u32 count;
173 u32 flags;
174};
175
176static struct event_counter *all_counters;
Len Brown5229e872008-02-06 01:26:55 -0500177static u32 num_gpes;
178static u32 num_counters;
179static struct attribute **all_attrs;
180static u32 acpi_gpe_count;
181
182static struct attribute_group interrupt_stats_attr_group = {
183 .name = "interrupts",
184};
185static struct kobj_attribute *counter_attrs;
186
187static 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
Zhang Rui71b58cb2008-06-20 09:42:47 +0800211static 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
Len Brown5229e872008-02-06 01:26:55 -0500246static void delete_gpe_attr_array(void)
247{
Zhang Rui71b58cb2008-06-20 09:42:47 +0800248 struct event_counter *tmp = all_counters;
Len Brown5229e872008-02-06 01:26:55 -0500249
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
266void 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)
Zhang Rui71b58cb2008-06-20 09:42:47 +0800274 all_counters[gpe_number].count++;
Len Brown5229e872008-02-06 01:26:55 -0500275 else
Zhang Rui71b58cb2008-06-20 09:42:47 +0800276 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
277 count++;
Len Brown5229e872008-02-06 01:26:55 -0500278
279 return;
280}
281
282void acpi_os_fixed_event_count(u32 event_number)
283{
284 if (!all_counters)
285 return;
286
287 if (event_number < ACPI_NUM_FIXED_EVENTS)
Zhang Rui71b58cb2008-06-20 09:42:47 +0800288 all_counters[num_gpes + event_number].count++;
Len Brown5229e872008-02-06 01:26:55 -0500289 else
Zhang Rui71b58cb2008-06-20 09:42:47 +0800290 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
291 count++;
Len Brown5229e872008-02-06 01:26:55 -0500292
293 return;
294}
295
Zhang Rui71b58cb2008-06-20 09:42:47 +0800296static 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;
321end:
322 return result;
323}
324
Len Brown5229e872008-02-06 01:26:55 -0500325static ssize_t counter_show(struct kobject *kobj,
326 struct kobj_attribute *attr, char *buf)
327{
Zhang Rui71b58cb2008-06-20 09:42:47 +0800328 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 =
Len Brown5229e872008-02-06 01:26:55 -0500335 acpi_irq_handled;
Zhang Rui71b58cb2008-06-20 09:42:47 +0800336 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
Len Brown5229e872008-02-06 01:26:55 -0500337 acpi_gpe_count;
338
Zhang Rui71b58cb2008-06-20 09:42:47 +0800339 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
356end:
357 size += sprintf(buf + size, "\n");
358 return result ? result : size;
Len Brown5229e872008-02-06 01:26:55 -0500359}
360
361/*
362 * counter_set() sets the specified counter.
363 * setting the total "sci" file to any value clears all counters.
Zhang Rui71b58cb2008-06-20 09:42:47 +0800364 * enable/disable/clear a gpe/fixed event in user space.
Len Brown5229e872008-02-06 01:26:55 -0500365 */
366static 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;
Zhang Rui71b58cb2008-06-20 09:42:47 +0800370 acpi_event_status status;
371 acpi_handle handle;
372 int result = 0;
Len Brown5229e872008-02-06 01:26:55 -0500373
374 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
375 int i;
376 for (i = 0; i < num_counters; ++i)
Zhang Rui71b58cb2008-06-20 09:42:47 +0800377 all_counters[i].count = 0;
Len Brown5229e872008-02-06 01:26:55 -0500378 acpi_gpe_count = 0;
379 acpi_irq_handled = 0;
Zhang Rui71b58cb2008-06-20 09:42:47 +0800380 goto end;
381 }
Len Brown5229e872008-02-06 01:26:55 -0500382
Zhang Rui71b58cb2008-06-20 09:42:47 +0800383 /* 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)) {
Lin Ming55ac9a02008-09-28 14:51:56 +0800389 printk(KERN_WARNING PREFIX
390 "Can not change Invalid GPE/Fixed Event status\n");
Zhang Rui71b58cb2008-06-20 09:42:47 +0800391 return -EINVAL;
392 }
393
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);
Len Brown5229e872008-02-06 01:26:55 -0500419 } else
Zhang Rui71b58cb2008-06-20 09:42:47 +0800420 all_counters[index].count = strtoul(buf, NULL, 0);
Len Brown5229e872008-02-06 01:26:55 -0500421
Zhang Rui71b58cb2008-06-20 09:42:47 +0800422 if (ACPI_FAILURE(result))
423 result = -EINVAL;
424end:
425 return result ? result : size;
Len Brown5229e872008-02-06 01:26:55 -0500426}
427
428void 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
Zhang Rui71b58cb2008-06-20 09:42:47 +0800443 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
444 GFP_KERNEL);
Len Brown5229e872008-02-06 01:26:55 -0500445 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) {
Johann Felix Sodenc8dc9de2008-03-11 16:44:26 +0100454 char buffer[12];
Len Brown5229e872008-02-06 01:26:55 -0500455 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;
Len Brownb7143152008-02-07 04:24:01 -0500492 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
493 return;
Len Brown5229e872008-02-06 01:26:55 -0500494
495fail:
496 delete_gpe_attr_array();
497 return;
498}
499
500static 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
Zhang Ruid4c5f042007-06-14 17:43:07 +0800509/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 FS Interface (/proc)
511 -------------------------------------------------------------------------- */
Zhang Rui5bb730f2007-01-29 11:02:42 +0800512#ifdef CONFIG_ACPI_PROCFS
Zhang Ruid4c5f042007-06-14 17:43:07 +0800513#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"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
Len Brown4be44fc2005-08-05 00:44:28 -0400518static int acpi_system_read_info(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
521 seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
Patrick Mocheld550d982006-06-27 00:41:40 -0400522 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523}
524
525static 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
Arjan van de Vend7508032006-07-04 13:06:00 -0400530static const struct file_operations acpi_system_info_ops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700531 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400532 .open = acpi_system_info_open_fs,
533 .read = seq_read,
534 .llseek = seq_lseek,
535 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536};
537
Len Brown4be44fc2005-08-05 00:44:28 -0400538static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
539 loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
Arjan van de Vend7508032006-07-04 13:06:00 -0400541static const struct file_operations acpi_system_dsdt_ops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700542 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400543 .read = acpi_system_read_dsdt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544};
545
546static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -0400547acpi_system_read_dsdt(struct file *file,
548 char __user * buffer, size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549{
Len Brown4be44fc2005-08-05 00:44:28 -0400550 acpi_status status = AE_OK;
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300551 struct acpi_table_header *dsdt = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400552 ssize_t res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300554 status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400556 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
Zhang Ruid4c5f042007-06-14 17:43:07 +0800558 res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
Patrick Mocheld550d982006-06-27 00:41:40 -0400560 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561}
562
Len Brown4be44fc2005-08-05 00:44:28 -0400563static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
564 loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
Arjan van de Vend7508032006-07-04 13:06:00 -0400566static const struct file_operations acpi_system_fadt_ops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700567 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400568 .read = acpi_system_read_fadt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569};
570
571static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -0400572acpi_system_read_fadt(struct file *file,
573 char __user * buffer, size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574{
Len Brown4be44fc2005-08-05 00:44:28 -0400575 acpi_status status = AE_OK;
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300576 struct acpi_table_header *fadt = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400577 ssize_t res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300579 status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400581 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Zhang Ruid4c5f042007-06-14 17:43:07 +0800583 res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584
Patrick Mocheld550d982006-06-27 00:41:40 -0400585 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586}
587
Zhang Ruid4c5f042007-06-14 17:43:07 +0800588static int acpi_system_procfs_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589{
Len Brown4be44fc2005-08-05 00:44:28 -0400590 struct proc_dir_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 /* 'info' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700594 entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir,
595 &acpi_system_info_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 if (!entry)
597 goto Error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598
599 /* 'dsdt' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700600 entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir,
601 &acpi_system_dsdt_ops);
602 if (!entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 goto Error;
604
605 /* 'fadt' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700606 entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir,
607 &acpi_system_fadt_ops);
608 if (!entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 goto Error;
610
Len Brown4be44fc2005-08-05 00:44:28 -0400611 Done:
Patrick Mocheld550d982006-06-27 00:41:40 -0400612 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
Len Brown4be44fc2005-08-05 00:44:28 -0400614 Error:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 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}
Zhang Ruid4c5f042007-06-14 17:43:07 +0800622#else
623static int acpi_system_procfs_init(void)
624{
625 return 0;
626}
627#endif
628
629static 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}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645subsys_initcall(acpi_system_init);