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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; | |
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 | ||
102 | static 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 | ||
133 | static 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 | ||
a77aa28a GKH |
140 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); |
141 | if (!tables_kobj) | |
142 | return -ENOMEM; | |
d4c5f047 ZR |
143 | |
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 = | |
a77aa28a | 156 | sysfs_create_bin_file(tables_kobj, |
d4c5f047 ZR |
157 | &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); | |
a77aa28a | 166 | kobject_uevent(tables_kobj, KOBJ_ADD); |
d4c5f047 ZR |
167 | |
168 | return 0; | |
169 | } | |
170 | ||
5229e87d LB |
171 | /* |
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 | ||
181 | static u32 *all_counters; | |
182 | static u32 num_gpes; | |
183 | static u32 num_counters; | |
184 | static struct attribute **all_attrs; | |
185 | static u32 acpi_gpe_count; | |
186 | ||
187 | static struct attribute_group interrupt_stats_attr_group = { | |
188 | .name = "interrupts", | |
189 | }; | |
190 | static struct kobj_attribute *counter_attrs; | |
191 | ||
192 | static 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 | ||
216 | static 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 | ||
236 | void 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 | ||
251 | void 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 | ||
264 | static 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 | */ | |
279 | static 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 | ||
297 | void 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) { | |
c8dc9de1 | 322 | char buffer[12]; |
5229e87d LB |
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; | |
b7143156 LB |
360 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) |
361 | return; | |
5229e87d LB |
362 | |
363 | fail: | |
364 | delete_gpe_attr_array(); | |
365 | return; | |
366 | } | |
367 | ||
368 | static 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 | ||
1da177e4 LT |
377 | /* -------------------------------------------------------------------------- |
378 | FS Interface (/proc) | |
379 | -------------------------------------------------------------------------- */ | |
5bb730fd | 380 | #ifdef CONFIG_ACPI_PROCFS |
d4c5f047 ZR |
381 | #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" | |
1da177e4 | 385 | |
4be44fcd | 386 | static int acpi_system_read_info(struct seq_file *seq, void *offset) |
1da177e4 | 387 | { |
1da177e4 LT |
388 | |
389 | seq_printf(seq, "version: %x\n", ACPI_CA_VERSION); | |
d550d98d | 390 | return 0; |
1da177e4 LT |
391 | } |
392 | ||
393 | static 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 | ||
d7508032 | 398 | static const struct file_operations acpi_system_info_ops = { |
4be44fcd LB |
399 | .open = acpi_system_info_open_fs, |
400 | .read = seq_read, | |
401 | .llseek = seq_lseek, | |
402 | .release = single_release, | |
1da177e4 LT |
403 | }; |
404 | ||
4be44fcd LB |
405 | static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t, |
406 | loff_t *); | |
1da177e4 | 407 | |
d7508032 | 408 | static const struct file_operations acpi_system_dsdt_ops = { |
4be44fcd | 409 | .read = acpi_system_read_dsdt, |
1da177e4 LT |
410 | }; |
411 | ||
412 | static ssize_t | |
4be44fcd LB |
413 | acpi_system_read_dsdt(struct file *file, |
414 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 415 | { |
4be44fcd | 416 | acpi_status status = AE_OK; |
ad71860a | 417 | struct acpi_table_header *dsdt = NULL; |
4be44fcd | 418 | ssize_t res; |
1da177e4 | 419 | |
ad71860a | 420 | status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt); |
1da177e4 | 421 | if (ACPI_FAILURE(status)) |
d550d98d | 422 | return -ENODEV; |
1da177e4 | 423 | |
d4c5f047 | 424 | res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length); |
1da177e4 | 425 | |
d550d98d | 426 | return res; |
1da177e4 LT |
427 | } |
428 | ||
4be44fcd LB |
429 | static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t, |
430 | loff_t *); | |
1da177e4 | 431 | |
d7508032 | 432 | static const struct file_operations acpi_system_fadt_ops = { |
4be44fcd | 433 | .read = acpi_system_read_fadt, |
1da177e4 LT |
434 | }; |
435 | ||
436 | static ssize_t | |
4be44fcd LB |
437 | acpi_system_read_fadt(struct file *file, |
438 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 439 | { |
4be44fcd | 440 | acpi_status status = AE_OK; |
ad71860a | 441 | struct acpi_table_header *fadt = NULL; |
4be44fcd | 442 | ssize_t res; |
1da177e4 | 443 | |
ad71860a | 444 | status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt); |
1da177e4 | 445 | if (ACPI_FAILURE(status)) |
d550d98d | 446 | return -ENODEV; |
1da177e4 | 447 | |
d4c5f047 | 448 | res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length); |
1da177e4 | 449 | |
d550d98d | 450 | return res; |
1da177e4 LT |
451 | } |
452 | ||
d4c5f047 | 453 | static int acpi_system_procfs_init(void) |
1da177e4 | 454 | { |
4be44fcd | 455 | struct proc_dir_entry *entry; |
1da177e4 | 456 | int error = 0; |
4be44fcd | 457 | char *name; |
1da177e4 | 458 | |
1da177e4 LT |
459 | /* 'info' [R] */ |
460 | name = ACPI_SYSTEM_FILE_INFO; | |
4be44fcd | 461 | entry = create_proc_entry(name, S_IRUGO, acpi_root_dir); |
1da177e4 LT |
462 | 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; | |
4be44fcd | 473 | else |
1da177e4 LT |
474 | 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 | ||
4be44fcd | 484 | Done: |
d550d98d | 485 | return error; |
1da177e4 | 486 | |
4be44fcd | 487 | Error: |
1da177e4 LT |
488 | 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 | } | |
d4c5f047 ZR |
495 | #else |
496 | static int acpi_system_procfs_init(void) | |
497 | { | |
498 | return 0; | |
499 | } | |
500 | #endif | |
501 | ||
502 | static 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 | } | |
1da177e4 | 517 | |
1da177e4 | 518 | subsys_initcall(acpi_system_init); |