blob: 55cf4c05bb74edc7714ddb4a000b729395feb291 [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>
29#include <asm/uaccess.h>
30
31#include <acpi/acpi_drivers.h>
32
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#define _COMPONENT ACPI_SYSTEM_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050034ACPI_MODULE_NAME("system");
Zhang Rui5bb730f2007-01-29 11:02:42 +080035#ifdef MODULE_PARAM_PREFIX
36#undef MODULE_PARAM_PREFIX
37#endif
38#define MODULE_PARAM_PREFIX "acpi."
39
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;
44
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 Ruid4c5f042007-06-14 17:43:07 +080064
65struct acpi_table_attr {
66 struct bin_attribute attr;
67 char name[8];
68 int instance;
69 struct list_head node;
70};
71
72static ssize_t acpi_table_show(struct kobject *kobj,
73 struct bin_attribute *bin_attr, char *buf,
74 loff_t offset, size_t count)
75{
76 struct acpi_table_attr *table_attr =
77 container_of(bin_attr, struct acpi_table_attr, attr);
78 struct acpi_table_header *table_header = NULL;
79 acpi_status status;
80 ssize_t ret_count = count;
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
88 if (offset >= table_header->length) {
89 ret_count = 0;
90 goto end;
91 }
92
93 if (offset + ret_count > table_header->length)
94 ret_count = table_header->length - offset;
95
96 memcpy(buf, ((char *)table_header) + offset, ret_count);
97
98 end:
99 return ret_count;
100}
101
102static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
103 struct acpi_table_header *table_header)
104{
105 struct acpi_table_header *header = NULL;
106 struct acpi_table_attr *attr = NULL;
107
108 memcpy(table_attr->name, table_header->signature, ACPI_NAME_SIZE);
109
110 list_for_each_entry(attr, &acpi_table_attr_list, node) {
111 if (!memcmp(table_header->signature, attr->name,
112 ACPI_NAME_SIZE))
113 if (table_attr->instance < attr->instance)
114 table_attr->instance = attr->instance;
115 }
116 table_attr->instance++;
117
118 if (table_attr->instance > 1 || (table_attr->instance == 1 &&
119 !acpi_get_table(table_header->
120 signature, 2,
121 &header)))
122 sprintf(table_attr->name + 4, "%d", table_attr->instance);
123
124 table_attr->attr.size = 0;
125 table_attr->attr.read = acpi_table_show;
126 table_attr->attr.attr.name = table_attr->name;
127 table_attr->attr.attr.mode = 0444;
128 table_attr->attr.attr.owner = THIS_MODULE;
129
130 return;
131}
132
133static int acpi_system_sysfs_init(void)
134{
135 struct acpi_table_attr *table_attr;
136 struct acpi_table_header *table_header = NULL;
137 int table_index = 0;
138 int result;
139
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400140 tables_kobj = kobject_create_and_add("tables", acpi_kobj);
141 if (!tables_kobj)
142 return -ENOMEM;
Zhang Ruid4c5f042007-06-14 17:43:07 +0800143
144 do {
145 result = acpi_get_table_by_index(table_index, &table_header);
146 if (!result) {
147 table_index++;
148 table_attr = NULL;
149 table_attr =
150 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
151 if (!table_attr)
152 return -ENOMEM;
153
154 acpi_table_attr_init(table_attr, table_header);
155 result =
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400156 sysfs_create_bin_file(tables_kobj,
Zhang Ruid4c5f042007-06-14 17:43:07 +0800157 &table_attr->attr);
158 if (result) {
159 kfree(table_attr);
160 return result;
161 } else
162 list_add_tail(&table_attr->node,
163 &acpi_table_attr_list);
164 }
165 } while (!result);
Greg Kroah-Hartmana77aa282007-12-17 15:54:39 -0400166 kobject_uevent(tables_kobj, KOBJ_ADD);
Zhang Ruid4c5f042007-06-14 17:43:07 +0800167
168 return 0;
169}
170
Len Brown5229e872008-02-06 01:26:55 -0500171/*
172 * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
173 * See Documentation/ABI/testing/sysfs-firmware-acpi
174 */
175
176#define COUNT_GPE 0
177#define COUNT_SCI 1 /* acpi_irq_handled */
178#define COUNT_ERROR 2 /* other */
179#define NUM_COUNTERS_EXTRA 3
180
181static u32 *all_counters;
182static u32 num_gpes;
183static u32 num_counters;
184static struct attribute **all_attrs;
185static u32 acpi_gpe_count;
186
187static struct attribute_group interrupt_stats_attr_group = {
188 .name = "interrupts",
189};
190static struct kobj_attribute *counter_attrs;
191
192static int count_num_gpes(void)
193{
194 int count = 0;
195 struct acpi_gpe_xrupt_info *gpe_xrupt_info;
196 struct acpi_gpe_block_info *gpe_block;
197 acpi_cpu_flags flags;
198
199 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
200
201 gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
202 while (gpe_xrupt_info) {
203 gpe_block = gpe_xrupt_info->gpe_block_list_head;
204 while (gpe_block) {
205 count += gpe_block->register_count *
206 ACPI_GPE_REGISTER_WIDTH;
207 gpe_block = gpe_block->next;
208 }
209 gpe_xrupt_info = gpe_xrupt_info->next;
210 }
211 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
212
213 return count;
214}
215
216static void delete_gpe_attr_array(void)
217{
218 u32 *tmp = all_counters;
219
220 all_counters = NULL;
221 kfree(tmp);
222
223 if (counter_attrs) {
224 int i;
225
226 for (i = 0; i < num_gpes; i++)
227 kfree(counter_attrs[i].attr.name);
228
229 kfree(counter_attrs);
230 }
231 kfree(all_attrs);
232
233 return;
234}
235
236void acpi_os_gpe_count(u32 gpe_number)
237{
238 acpi_gpe_count++;
239
240 if (!all_counters)
241 return;
242
243 if (gpe_number < num_gpes)
244 all_counters[gpe_number]++;
245 else
246 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;
247
248 return;
249}
250
251void acpi_os_fixed_event_count(u32 event_number)
252{
253 if (!all_counters)
254 return;
255
256 if (event_number < ACPI_NUM_FIXED_EVENTS)
257 all_counters[num_gpes + event_number]++;
258 else
259 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;
260
261 return;
262}
263
264static ssize_t counter_show(struct kobject *kobj,
265 struct kobj_attribute *attr, char *buf)
266{
267 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI] =
268 acpi_irq_handled;
269 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE] =
270 acpi_gpe_count;
271
272 return sprintf(buf, "%d\n", all_counters[attr - counter_attrs]);
273}
274
275/*
276 * counter_set() sets the specified counter.
277 * setting the total "sci" file to any value clears all counters.
278 */
279static ssize_t counter_set(struct kobject *kobj,
280 struct kobj_attribute *attr, const char *buf, size_t size)
281{
282 int index = attr - counter_attrs;
283
284 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
285 int i;
286 for (i = 0; i < num_counters; ++i)
287 all_counters[i] = 0;
288 acpi_gpe_count = 0;
289 acpi_irq_handled = 0;
290
291 } else
292 all_counters[index] = strtoul(buf, NULL, 0);
293
294 return size;
295}
296
297void acpi_irq_stats_init(void)
298{
299 int i;
300
301 if (all_counters)
302 return;
303
304 num_gpes = count_num_gpes();
305 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
306
307 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
308 GFP_KERNEL);
309 if (all_attrs == NULL)
310 return;
311
312 all_counters = kzalloc(sizeof(u32) * (num_counters), GFP_KERNEL);
313 if (all_counters == NULL)
314 goto fail;
315
316 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
317 GFP_KERNEL);
318 if (counter_attrs == NULL)
319 goto fail;
320
321 for (i = 0; i < num_counters; ++i) {
322 char buffer[10];
323 char *name;
324
325 if (i < num_gpes)
326 sprintf(buffer, "gpe%02X", i);
327 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
328 sprintf(buffer, "ff_pmtimer");
329 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
330 sprintf(buffer, "ff_gbl_lock");
331 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
332 sprintf(buffer, "ff_pwr_btn");
333 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
334 sprintf(buffer, "ff_slp_btn");
335 else if (i == num_gpes + ACPI_EVENT_RTC)
336 sprintf(buffer, "ff_rt_clk");
337 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
338 sprintf(buffer, "gpe_all");
339 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
340 sprintf(buffer, "sci");
341 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
342 sprintf(buffer, "error");
343 else
344 sprintf(buffer, "bug%02X", i);
345
346 name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
347 if (name == NULL)
348 goto fail;
349 strncpy(name, buffer, strlen(buffer) + 1);
350
351 counter_attrs[i].attr.name = name;
352 counter_attrs[i].attr.mode = 0644;
353 counter_attrs[i].show = counter_show;
354 counter_attrs[i].store = counter_set;
355
356 all_attrs[i] = &counter_attrs[i].attr;
357 }
358
359 interrupt_stats_attr_group.attrs = all_attrs;
Len Brownb7143152008-02-07 04:24:01 -0500360 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
361 return;
Len Brown5229e872008-02-06 01:26:55 -0500362
363fail:
364 delete_gpe_attr_array();
365 return;
366}
367
368static void __exit interrupt_stats_exit(void)
369{
370 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
371
372 delete_gpe_attr_array();
373
374 return;
375}
376
Zhang Ruid4c5f042007-06-14 17:43:07 +0800377/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 FS Interface (/proc)
379 -------------------------------------------------------------------------- */
Zhang Rui5bb730f2007-01-29 11:02:42 +0800380#ifdef CONFIG_ACPI_PROCFS
Zhang Ruid4c5f042007-06-14 17:43:07 +0800381#define ACPI_SYSTEM_FILE_INFO "info"
382#define ACPI_SYSTEM_FILE_EVENT "event"
383#define ACPI_SYSTEM_FILE_DSDT "dsdt"
384#define ACPI_SYSTEM_FILE_FADT "fadt"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
Len Brown4be44fc2005-08-05 00:44:28 -0400386static int acpi_system_read_info(struct seq_file *seq, void *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
389 seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
Patrick Mocheld550d982006-06-27 00:41:40 -0400390 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391}
392
393static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
394{
395 return single_open(file, acpi_system_read_info, PDE(inode)->data);
396}
397
Arjan van de Vend7508032006-07-04 13:06:00 -0400398static const struct file_operations acpi_system_info_ops = {
Len Brown4be44fc2005-08-05 00:44:28 -0400399 .open = acpi_system_info_open_fs,
400 .read = seq_read,
401 .llseek = seq_lseek,
402 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403};
404
Len Brown4be44fc2005-08-05 00:44:28 -0400405static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
406 loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407
Arjan van de Vend7508032006-07-04 13:06:00 -0400408static const struct file_operations acpi_system_dsdt_ops = {
Len Brown4be44fc2005-08-05 00:44:28 -0400409 .read = acpi_system_read_dsdt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410};
411
412static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -0400413acpi_system_read_dsdt(struct file *file,
414 char __user * buffer, size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415{
Len Brown4be44fc2005-08-05 00:44:28 -0400416 acpi_status status = AE_OK;
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300417 struct acpi_table_header *dsdt = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400418 ssize_t res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300420 status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400422 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
Zhang Ruid4c5f042007-06-14 17:43:07 +0800424 res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Patrick Mocheld550d982006-06-27 00:41:40 -0400426 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427}
428
Len Brown4be44fc2005-08-05 00:44:28 -0400429static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
430 loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
Arjan van de Vend7508032006-07-04 13:06:00 -0400432static const struct file_operations acpi_system_fadt_ops = {
Len Brown4be44fc2005-08-05 00:44:28 -0400433 .read = acpi_system_read_fadt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434};
435
436static ssize_t
Len Brown4be44fc2005-08-05 00:44:28 -0400437acpi_system_read_fadt(struct file *file,
438 char __user * buffer, size_t count, loff_t * ppos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439{
Len Brown4be44fc2005-08-05 00:44:28 -0400440 acpi_status status = AE_OK;
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300441 struct acpi_table_header *fadt = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400442 ssize_t res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300444 status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400446 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
Zhang Ruid4c5f042007-06-14 17:43:07 +0800448 res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
Patrick Mocheld550d982006-06-27 00:41:40 -0400450 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451}
452
Zhang Ruid4c5f042007-06-14 17:43:07 +0800453static int acpi_system_procfs_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454{
Len Brown4be44fc2005-08-05 00:44:28 -0400455 struct proc_dir_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 int error = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400457 char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 /* 'info' [R] */
460 name = ACPI_SYSTEM_FILE_INFO;
Len Brown4be44fc2005-08-05 00:44:28 -0400461 entry = create_proc_entry(name, S_IRUGO, acpi_root_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 if (!entry)
463 goto Error;
464 else {
465 entry->proc_fops = &acpi_system_info_ops;
466 }
467
468 /* 'dsdt' [R] */
469 name = ACPI_SYSTEM_FILE_DSDT;
470 entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
471 if (entry)
472 entry->proc_fops = &acpi_system_dsdt_ops;
Len Brown4be44fc2005-08-05 00:44:28 -0400473 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 goto Error;
475
476 /* 'fadt' [R] */
477 name = ACPI_SYSTEM_FILE_FADT;
478 entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
479 if (entry)
480 entry->proc_fops = &acpi_system_fadt_ops;
481 else
482 goto Error;
483
Len Brown4be44fc2005-08-05 00:44:28 -0400484 Done:
Patrick Mocheld550d982006-06-27 00:41:40 -0400485 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Len Brown4be44fc2005-08-05 00:44:28 -0400487 Error:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
489 remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
490 remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
491
492 error = -EFAULT;
493 goto Done;
494}
Zhang Ruid4c5f042007-06-14 17:43:07 +0800495#else
496static int acpi_system_procfs_init(void)
497{
498 return 0;
499}
500#endif
501
502static int __init acpi_system_init(void)
503{
504 int result = 0;
505
506 if (acpi_disabled)
507 return 0;
508
509 result = acpi_system_procfs_init();
510 if (result)
511 return result;
512
513 result = acpi_system_sysfs_init();
514
515 return result;
516}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518subsys_initcall(acpi_system_init);