Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * acpi_system.c - ACPI System Driver ($Revision: 63 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
26 | #include <linux/proc_fs.h> | |
27 | #include <linux/seq_file.h> | |
28 | #include <linux/init.h> | |
29 | #include <asm/uaccess.h> | |
30 | ||
31 | #include <acpi/acpi_drivers.h> | |
32 | ||
1da177e4 | 33 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
f52fd66d | 34 | ACPI_MODULE_NAME("system"); |
5bb730fd ZR |
35 | #ifdef MODULE_PARAM_PREFIX |
36 | #undef MODULE_PARAM_PREFIX | |
37 | #endif | |
38 | #define MODULE_PARAM_PREFIX "acpi." | |
39 | ||
1da177e4 | 40 | #define ACPI_SYSTEM_CLASS "system" |
1da177e4 | 41 | #define ACPI_SYSTEM_DEVICE_NAME "System" |
1da177e4 | 42 | |
5229e87d LB |
43 | u32 acpi_irq_handled; |
44 | ||
5bb730fd ZR |
45 | /* |
46 | * Make ACPICA version work as module param | |
47 | */ | |
d4c5f047 ZR |
48 | static int param_get_acpica_version(char *buffer, struct kernel_param *kp) |
49 | { | |
5bb730fd ZR |
50 | int result; |
51 | ||
52 | result = sprintf(buffer, "%x", ACPI_CA_VERSION); | |
53 | ||
54 | return result; | |
55 | } | |
56 | ||
57 | module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444); | |
58 | ||
d4c5f047 ZR |
59 | /* -------------------------------------------------------------------------- |
60 | FS Interface (/sys) | |
61 | -------------------------------------------------------------------------- */ | |
62 | static LIST_HEAD(acpi_table_attr_list); | |
a77aa28a | 63 | static struct kobject *tables_kobj; |
d4c5f047 ZR |
64 | |
65 | struct acpi_table_attr { | |
66 | struct bin_attribute attr; | |
67 | char name[8]; | |
68 | int instance; | |
69 | struct list_head node; | |
70 | }; | |
71 | ||
72 | static 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; | |
d4c5f047 ZR |
80 | |
81 | status = | |
82 | acpi_get_table(table_attr->name, table_attr->instance, | |
83 | &table_header); | |
84 | if (ACPI_FAILURE(status)) | |
85 | return -ENODEV; | |
86 | ||
46a21e46 AM |
87 | return memory_read_from_buffer(buf, count, &offset, |
88 | table_header, table_header->length); | |
d4c5f047 ZR |
89 | } |
90 | ||
91 | static void acpi_table_attr_init(struct acpi_table_attr *table_attr, | |
92 | struct acpi_table_header *table_header) | |
93 | { | |
94 | struct acpi_table_header *header = NULL; | |
95 | struct acpi_table_attr *attr = NULL; | |
96 | ||
97 | memcpy(table_attr->name, table_header->signature, ACPI_NAME_SIZE); | |
98 | ||
99 | list_for_each_entry(attr, &acpi_table_attr_list, node) { | |
100 | if (!memcmp(table_header->signature, attr->name, | |
101 | ACPI_NAME_SIZE)) | |
102 | if (table_attr->instance < attr->instance) | |
103 | table_attr->instance = attr->instance; | |
104 | } | |
105 | table_attr->instance++; | |
106 | ||
107 | if (table_attr->instance > 1 || (table_attr->instance == 1 && | |
108 | !acpi_get_table(table_header-> | |
109 | signature, 2, | |
110 | &header))) | |
111 | sprintf(table_attr->name + 4, "%d", table_attr->instance); | |
112 | ||
113 | table_attr->attr.size = 0; | |
114 | table_attr->attr.read = acpi_table_show; | |
115 | table_attr->attr.attr.name = table_attr->name; | |
116 | table_attr->attr.attr.mode = 0444; | |
117 | table_attr->attr.attr.owner = THIS_MODULE; | |
118 | ||
119 | return; | |
120 | } | |
121 | ||
122 | static int acpi_system_sysfs_init(void) | |
123 | { | |
124 | struct acpi_table_attr *table_attr; | |
125 | struct acpi_table_header *table_header = NULL; | |
126 | int table_index = 0; | |
127 | int result; | |
128 | ||
a77aa28a GKH |
129 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); |
130 | if (!tables_kobj) | |
131 | return -ENOMEM; | |
d4c5f047 ZR |
132 | |
133 | do { | |
134 | result = acpi_get_table_by_index(table_index, &table_header); | |
135 | if (!result) { | |
136 | table_index++; | |
137 | table_attr = NULL; | |
138 | table_attr = | |
139 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
140 | if (!table_attr) | |
141 | return -ENOMEM; | |
142 | ||
143 | acpi_table_attr_init(table_attr, table_header); | |
144 | result = | |
a77aa28a | 145 | sysfs_create_bin_file(tables_kobj, |
d4c5f047 ZR |
146 | &table_attr->attr); |
147 | if (result) { | |
148 | kfree(table_attr); | |
149 | return result; | |
150 | } else | |
151 | list_add_tail(&table_attr->node, | |
152 | &acpi_table_attr_list); | |
153 | } | |
154 | } while (!result); | |
a77aa28a | 155 | kobject_uevent(tables_kobj, KOBJ_ADD); |
d4c5f047 ZR |
156 | |
157 | return 0; | |
158 | } | |
159 | ||
5229e87d LB |
160 | /* |
161 | * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/ | |
162 | * See Documentation/ABI/testing/sysfs-firmware-acpi | |
163 | */ | |
164 | ||
165 | #define COUNT_GPE 0 | |
166 | #define COUNT_SCI 1 /* acpi_irq_handled */ | |
167 | #define COUNT_ERROR 2 /* other */ | |
168 | #define NUM_COUNTERS_EXTRA 3 | |
169 | ||
170 | static u32 *all_counters; | |
171 | static u32 num_gpes; | |
172 | static u32 num_counters; | |
173 | static struct attribute **all_attrs; | |
174 | static u32 acpi_gpe_count; | |
175 | ||
176 | static struct attribute_group interrupt_stats_attr_group = { | |
177 | .name = "interrupts", | |
178 | }; | |
179 | static struct kobj_attribute *counter_attrs; | |
180 | ||
181 | static int count_num_gpes(void) | |
182 | { | |
183 | int count = 0; | |
184 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
185 | struct acpi_gpe_block_info *gpe_block; | |
186 | acpi_cpu_flags flags; | |
187 | ||
188 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); | |
189 | ||
190 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
191 | while (gpe_xrupt_info) { | |
192 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
193 | while (gpe_block) { | |
194 | count += gpe_block->register_count * | |
195 | ACPI_GPE_REGISTER_WIDTH; | |
196 | gpe_block = gpe_block->next; | |
197 | } | |
198 | gpe_xrupt_info = gpe_xrupt_info->next; | |
199 | } | |
200 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
201 | ||
202 | return count; | |
203 | } | |
204 | ||
205 | static void delete_gpe_attr_array(void) | |
206 | { | |
207 | u32 *tmp = all_counters; | |
208 | ||
209 | all_counters = NULL; | |
210 | kfree(tmp); | |
211 | ||
212 | if (counter_attrs) { | |
213 | int i; | |
214 | ||
215 | for (i = 0; i < num_gpes; i++) | |
216 | kfree(counter_attrs[i].attr.name); | |
217 | ||
218 | kfree(counter_attrs); | |
219 | } | |
220 | kfree(all_attrs); | |
221 | ||
222 | return; | |
223 | } | |
224 | ||
225 | void acpi_os_gpe_count(u32 gpe_number) | |
226 | { | |
227 | acpi_gpe_count++; | |
228 | ||
229 | if (!all_counters) | |
230 | return; | |
231 | ||
232 | if (gpe_number < num_gpes) | |
233 | all_counters[gpe_number]++; | |
234 | else | |
235 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++; | |
236 | ||
237 | return; | |
238 | } | |
239 | ||
240 | void acpi_os_fixed_event_count(u32 event_number) | |
241 | { | |
242 | if (!all_counters) | |
243 | return; | |
244 | ||
245 | if (event_number < ACPI_NUM_FIXED_EVENTS) | |
246 | all_counters[num_gpes + event_number]++; | |
247 | else | |
248 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++; | |
249 | ||
250 | return; | |
251 | } | |
252 | ||
253 | static ssize_t counter_show(struct kobject *kobj, | |
254 | struct kobj_attribute *attr, char *buf) | |
255 | { | |
256 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI] = | |
257 | acpi_irq_handled; | |
258 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE] = | |
259 | acpi_gpe_count; | |
260 | ||
261 | return sprintf(buf, "%d\n", all_counters[attr - counter_attrs]); | |
262 | } | |
263 | ||
264 | /* | |
265 | * counter_set() sets the specified counter. | |
266 | * setting the total "sci" file to any value clears all counters. | |
267 | */ | |
268 | static ssize_t counter_set(struct kobject *kobj, | |
269 | struct kobj_attribute *attr, const char *buf, size_t size) | |
270 | { | |
271 | int index = attr - counter_attrs; | |
272 | ||
273 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { | |
274 | int i; | |
275 | for (i = 0; i < num_counters; ++i) | |
276 | all_counters[i] = 0; | |
277 | acpi_gpe_count = 0; | |
278 | acpi_irq_handled = 0; | |
279 | ||
280 | } else | |
281 | all_counters[index] = strtoul(buf, NULL, 0); | |
282 | ||
283 | return size; | |
284 | } | |
285 | ||
286 | void acpi_irq_stats_init(void) | |
287 | { | |
288 | int i; | |
289 | ||
290 | if (all_counters) | |
291 | return; | |
292 | ||
293 | num_gpes = count_num_gpes(); | |
294 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; | |
295 | ||
296 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), | |
297 | GFP_KERNEL); | |
298 | if (all_attrs == NULL) | |
299 | return; | |
300 | ||
301 | all_counters = kzalloc(sizeof(u32) * (num_counters), GFP_KERNEL); | |
302 | if (all_counters == NULL) | |
303 | goto fail; | |
304 | ||
305 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), | |
306 | GFP_KERNEL); | |
307 | if (counter_attrs == NULL) | |
308 | goto fail; | |
309 | ||
310 | for (i = 0; i < num_counters; ++i) { | |
c8dc9de1 | 311 | char buffer[12]; |
5229e87d LB |
312 | char *name; |
313 | ||
314 | if (i < num_gpes) | |
315 | sprintf(buffer, "gpe%02X", i); | |
316 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) | |
317 | sprintf(buffer, "ff_pmtimer"); | |
318 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) | |
319 | sprintf(buffer, "ff_gbl_lock"); | |
320 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) | |
321 | sprintf(buffer, "ff_pwr_btn"); | |
322 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) | |
323 | sprintf(buffer, "ff_slp_btn"); | |
324 | else if (i == num_gpes + ACPI_EVENT_RTC) | |
325 | sprintf(buffer, "ff_rt_clk"); | |
326 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) | |
327 | sprintf(buffer, "gpe_all"); | |
328 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) | |
329 | sprintf(buffer, "sci"); | |
330 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) | |
331 | sprintf(buffer, "error"); | |
332 | else | |
333 | sprintf(buffer, "bug%02X", i); | |
334 | ||
335 | name = kzalloc(strlen(buffer) + 1, GFP_KERNEL); | |
336 | if (name == NULL) | |
337 | goto fail; | |
338 | strncpy(name, buffer, strlen(buffer) + 1); | |
339 | ||
340 | counter_attrs[i].attr.name = name; | |
341 | counter_attrs[i].attr.mode = 0644; | |
342 | counter_attrs[i].show = counter_show; | |
343 | counter_attrs[i].store = counter_set; | |
344 | ||
345 | all_attrs[i] = &counter_attrs[i].attr; | |
346 | } | |
347 | ||
348 | interrupt_stats_attr_group.attrs = all_attrs; | |
b7143156 LB |
349 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) |
350 | return; | |
5229e87d LB |
351 | |
352 | fail: | |
353 | delete_gpe_attr_array(); | |
354 | return; | |
355 | } | |
356 | ||
357 | static void __exit interrupt_stats_exit(void) | |
358 | { | |
359 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); | |
360 | ||
361 | delete_gpe_attr_array(); | |
362 | ||
363 | return; | |
364 | } | |
365 | ||
1da177e4 LT |
366 | /* -------------------------------------------------------------------------- |
367 | FS Interface (/proc) | |
368 | -------------------------------------------------------------------------- */ | |
5bb730fd | 369 | #ifdef CONFIG_ACPI_PROCFS |
d4c5f047 ZR |
370 | #define ACPI_SYSTEM_FILE_INFO "info" |
371 | #define ACPI_SYSTEM_FILE_EVENT "event" | |
372 | #define ACPI_SYSTEM_FILE_DSDT "dsdt" | |
373 | #define ACPI_SYSTEM_FILE_FADT "fadt" | |
1da177e4 | 374 | |
4be44fcd | 375 | static int acpi_system_read_info(struct seq_file *seq, void *offset) |
1da177e4 | 376 | { |
1da177e4 LT |
377 | |
378 | seq_printf(seq, "version: %x\n", ACPI_CA_VERSION); | |
d550d98d | 379 | return 0; |
1da177e4 LT |
380 | } |
381 | ||
382 | static int acpi_system_info_open_fs(struct inode *inode, struct file *file) | |
383 | { | |
384 | return single_open(file, acpi_system_read_info, PDE(inode)->data); | |
385 | } | |
386 | ||
d7508032 | 387 | static const struct file_operations acpi_system_info_ops = { |
cf7acfab | 388 | .owner = THIS_MODULE, |
4be44fcd LB |
389 | .open = acpi_system_info_open_fs, |
390 | .read = seq_read, | |
391 | .llseek = seq_lseek, | |
392 | .release = single_release, | |
1da177e4 LT |
393 | }; |
394 | ||
4be44fcd LB |
395 | static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t, |
396 | loff_t *); | |
1da177e4 | 397 | |
d7508032 | 398 | static const struct file_operations acpi_system_dsdt_ops = { |
cf7acfab | 399 | .owner = THIS_MODULE, |
4be44fcd | 400 | .read = acpi_system_read_dsdt, |
1da177e4 LT |
401 | }; |
402 | ||
403 | static ssize_t | |
4be44fcd LB |
404 | acpi_system_read_dsdt(struct file *file, |
405 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 406 | { |
4be44fcd | 407 | acpi_status status = AE_OK; |
ad71860a | 408 | struct acpi_table_header *dsdt = NULL; |
4be44fcd | 409 | ssize_t res; |
1da177e4 | 410 | |
ad71860a | 411 | status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt); |
1da177e4 | 412 | if (ACPI_FAILURE(status)) |
d550d98d | 413 | return -ENODEV; |
1da177e4 | 414 | |
d4c5f047 | 415 | res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length); |
1da177e4 | 416 | |
d550d98d | 417 | return res; |
1da177e4 LT |
418 | } |
419 | ||
4be44fcd LB |
420 | static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t, |
421 | loff_t *); | |
1da177e4 | 422 | |
d7508032 | 423 | static const struct file_operations acpi_system_fadt_ops = { |
cf7acfab | 424 | .owner = THIS_MODULE, |
4be44fcd | 425 | .read = acpi_system_read_fadt, |
1da177e4 LT |
426 | }; |
427 | ||
428 | static ssize_t | |
4be44fcd LB |
429 | acpi_system_read_fadt(struct file *file, |
430 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 431 | { |
4be44fcd | 432 | acpi_status status = AE_OK; |
ad71860a | 433 | struct acpi_table_header *fadt = NULL; |
4be44fcd | 434 | ssize_t res; |
1da177e4 | 435 | |
ad71860a | 436 | status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt); |
1da177e4 | 437 | if (ACPI_FAILURE(status)) |
d550d98d | 438 | return -ENODEV; |
1da177e4 | 439 | |
d4c5f047 | 440 | res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length); |
1da177e4 | 441 | |
d550d98d | 442 | return res; |
1da177e4 LT |
443 | } |
444 | ||
d4c5f047 | 445 | static int acpi_system_procfs_init(void) |
1da177e4 | 446 | { |
4be44fcd | 447 | struct proc_dir_entry *entry; |
1da177e4 | 448 | int error = 0; |
1da177e4 | 449 | |
1da177e4 | 450 | /* 'info' [R] */ |
cf7acfab DL |
451 | entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir, |
452 | &acpi_system_info_ops); | |
1da177e4 LT |
453 | if (!entry) |
454 | goto Error; | |
1da177e4 LT |
455 | |
456 | /* 'dsdt' [R] */ | |
cf7acfab DL |
457 | entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir, |
458 | &acpi_system_dsdt_ops); | |
459 | if (!entry) | |
1da177e4 LT |
460 | goto Error; |
461 | ||
462 | /* 'fadt' [R] */ | |
cf7acfab DL |
463 | entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir, |
464 | &acpi_system_fadt_ops); | |
465 | if (!entry) | |
1da177e4 LT |
466 | goto Error; |
467 | ||
4be44fcd | 468 | Done: |
d550d98d | 469 | return error; |
1da177e4 | 470 | |
4be44fcd | 471 | Error: |
1da177e4 LT |
472 | remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir); |
473 | remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir); | |
474 | remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir); | |
475 | ||
476 | error = -EFAULT; | |
477 | goto Done; | |
478 | } | |
d4c5f047 ZR |
479 | #else |
480 | static int acpi_system_procfs_init(void) | |
481 | { | |
482 | return 0; | |
483 | } | |
484 | #endif | |
485 | ||
486 | static int __init acpi_system_init(void) | |
487 | { | |
488 | int result = 0; | |
489 | ||
490 | if (acpi_disabled) | |
491 | return 0; | |
492 | ||
493 | result = acpi_system_procfs_init(); | |
494 | if (result) | |
495 | return result; | |
496 | ||
497 | result = acpi_system_sysfs_init(); | |
498 | ||
499 | return result; | |
500 | } | |
1da177e4 | 501 | |
1da177e4 | 502 | subsys_initcall(acpi_system_init); |