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1da177e4 LT |
1 | /* |
2 | * acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $) | |
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 | * This driver fully implements the ACPI thermal policy as described in the | |
26 | * ACPI 2.0 Specification. | |
27 | * | |
28 | * TBD: 1. Implement passive cooling hysteresis. | |
29 | * 2. Enhance passive cooling (CPU) states/limit interface to support | |
30 | * concepts of 'multiple limiters', upper/lower limits, etc. | |
31 | * | |
32 | */ | |
33 | ||
34 | #include <linux/kernel.h> | |
35 | #include <linux/module.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/types.h> | |
38 | #include <linux/proc_fs.h> | |
39 | #include <linux/sched.h> | |
40 | #include <linux/kmod.h> | |
41 | #include <linux/seq_file.h> | |
42 | #include <asm/uaccess.h> | |
43 | ||
44 | #include <acpi/acpi_bus.h> | |
45 | #include <acpi/acpi_drivers.h> | |
46 | ||
47 | #define ACPI_THERMAL_COMPONENT 0x04000000 | |
48 | #define ACPI_THERMAL_CLASS "thermal_zone" | |
49 | #define ACPI_THERMAL_DRIVER_NAME "ACPI Thermal Zone Driver" | |
50 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" | |
51 | #define ACPI_THERMAL_FILE_STATE "state" | |
52 | #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" | |
53 | #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" | |
54 | #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" | |
55 | #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" | |
56 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 | |
57 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
58 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
59 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
60 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
61 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
62 | #define ACPI_THERMAL_MODE_PASSIVE 0x01 | |
63 | #define ACPI_THERMAL_MODE_CRITICAL 0xff | |
64 | #define ACPI_THERMAL_PATH_POWEROFF "/sbin/poweroff" | |
65 | ||
66 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
67 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
68 | ||
69 | #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10) | |
70 | #define CELSIUS_TO_KELVIN(t) ((t+273)*10) | |
71 | ||
72 | #define _COMPONENT ACPI_THERMAL_COMPONENT | |
4be44fcd | 73 | ACPI_MODULE_NAME("acpi_thermal") |
1da177e4 | 74 | |
4be44fcd | 75 | MODULE_AUTHOR("Paul Diefenbaugh"); |
1da177e4 LT |
76 | MODULE_DESCRIPTION(ACPI_THERMAL_DRIVER_NAME); |
77 | MODULE_LICENSE("GPL"); | |
78 | ||
79 | static int tzp; | |
80 | module_param(tzp, int, 0); | |
81 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n"); | |
82 | ||
4be44fcd LB |
83 | static int acpi_thermal_add(struct acpi_device *device); |
84 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
1da177e4 LT |
85 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); |
86 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); | |
87 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); | |
4be44fcd LB |
88 | static ssize_t acpi_thermal_write_trip_points(struct file *, |
89 | const char __user *, size_t, | |
90 | loff_t *); | |
1da177e4 | 91 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
92 | static ssize_t acpi_thermal_write_cooling_mode(struct file *, |
93 | const char __user *, size_t, | |
94 | loff_t *); | |
1da177e4 | 95 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
96 | static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, |
97 | size_t, loff_t *); | |
1da177e4 LT |
98 | |
99 | static struct acpi_driver acpi_thermal_driver = { | |
4be44fcd LB |
100 | .name = ACPI_THERMAL_DRIVER_NAME, |
101 | .class = ACPI_THERMAL_CLASS, | |
102 | .ids = ACPI_THERMAL_HID, | |
103 | .ops = { | |
104 | .add = acpi_thermal_add, | |
105 | .remove = acpi_thermal_remove, | |
106 | }, | |
1da177e4 LT |
107 | }; |
108 | ||
109 | struct acpi_thermal_state { | |
4be44fcd LB |
110 | u8 critical:1; |
111 | u8 hot:1; | |
112 | u8 passive:1; | |
113 | u8 active:1; | |
114 | u8 reserved:4; | |
115 | int active_index; | |
1da177e4 LT |
116 | }; |
117 | ||
118 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
119 | u8 valid:1; |
120 | u8 enabled:1; | |
121 | u8 reserved:6; | |
1da177e4 LT |
122 | }; |
123 | ||
124 | struct acpi_thermal_critical { | |
125 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 126 | unsigned long temperature; |
1da177e4 LT |
127 | }; |
128 | ||
129 | struct acpi_thermal_hot { | |
130 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 131 | unsigned long temperature; |
1da177e4 LT |
132 | }; |
133 | ||
134 | struct acpi_thermal_passive { | |
135 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
136 | unsigned long temperature; |
137 | unsigned long tc1; | |
138 | unsigned long tc2; | |
139 | unsigned long tsp; | |
140 | struct acpi_handle_list devices; | |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_thermal_active { | |
144 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
145 | unsigned long temperature; |
146 | struct acpi_handle_list devices; | |
1da177e4 LT |
147 | }; |
148 | ||
149 | struct acpi_thermal_trips { | |
150 | struct acpi_thermal_critical critical; | |
4be44fcd | 151 | struct acpi_thermal_hot hot; |
1da177e4 LT |
152 | struct acpi_thermal_passive passive; |
153 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
154 | }; | |
155 | ||
156 | struct acpi_thermal_flags { | |
4be44fcd LB |
157 | u8 cooling_mode:1; /* _SCP */ |
158 | u8 devices:1; /* _TZD */ | |
159 | u8 reserved:6; | |
1da177e4 LT |
160 | }; |
161 | ||
162 | struct acpi_thermal { | |
4be44fcd LB |
163 | acpi_handle handle; |
164 | acpi_bus_id name; | |
165 | unsigned long temperature; | |
166 | unsigned long last_temperature; | |
167 | unsigned long polling_frequency; | |
168 | u8 cooling_mode; | |
169 | volatile u8 zombie; | |
1da177e4 LT |
170 | struct acpi_thermal_flags flags; |
171 | struct acpi_thermal_state state; | |
172 | struct acpi_thermal_trips trips; | |
4be44fcd LB |
173 | struct acpi_handle_list devices; |
174 | struct timer_list timer; | |
1da177e4 LT |
175 | }; |
176 | ||
177 | static struct file_operations acpi_thermal_state_fops = { | |
4be44fcd LB |
178 | .open = acpi_thermal_state_open_fs, |
179 | .read = seq_read, | |
180 | .llseek = seq_lseek, | |
181 | .release = single_release, | |
1da177e4 LT |
182 | }; |
183 | ||
184 | static struct file_operations acpi_thermal_temp_fops = { | |
4be44fcd LB |
185 | .open = acpi_thermal_temp_open_fs, |
186 | .read = seq_read, | |
187 | .llseek = seq_lseek, | |
188 | .release = single_release, | |
1da177e4 LT |
189 | }; |
190 | ||
191 | static struct file_operations acpi_thermal_trip_fops = { | |
4be44fcd LB |
192 | .open = acpi_thermal_trip_open_fs, |
193 | .read = seq_read, | |
194 | .write = acpi_thermal_write_trip_points, | |
195 | .llseek = seq_lseek, | |
196 | .release = single_release, | |
1da177e4 LT |
197 | }; |
198 | ||
199 | static struct file_operations acpi_thermal_cooling_fops = { | |
4be44fcd LB |
200 | .open = acpi_thermal_cooling_open_fs, |
201 | .read = seq_read, | |
202 | .write = acpi_thermal_write_cooling_mode, | |
203 | .llseek = seq_lseek, | |
204 | .release = single_release, | |
1da177e4 LT |
205 | }; |
206 | ||
207 | static struct file_operations acpi_thermal_polling_fops = { | |
4be44fcd LB |
208 | .open = acpi_thermal_polling_open_fs, |
209 | .read = seq_read, | |
210 | .write = acpi_thermal_write_polling, | |
211 | .llseek = seq_lseek, | |
212 | .release = single_release, | |
1da177e4 LT |
213 | }; |
214 | ||
215 | /* -------------------------------------------------------------------------- | |
216 | Thermal Zone Management | |
217 | -------------------------------------------------------------------------- */ | |
218 | ||
4be44fcd | 219 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 220 | { |
4be44fcd | 221 | acpi_status status = AE_OK; |
1da177e4 LT |
222 | |
223 | ACPI_FUNCTION_TRACE("acpi_thermal_get_temperature"); | |
224 | ||
225 | if (!tz) | |
226 | return_VALUE(-EINVAL); | |
227 | ||
228 | tz->last_temperature = tz->temperature; | |
229 | ||
4be44fcd LB |
230 | status = |
231 | acpi_evaluate_integer(tz->handle, "_TMP", NULL, &tz->temperature); | |
1da177e4 LT |
232 | if (ACPI_FAILURE(status)) |
233 | return_VALUE(-ENODEV); | |
234 | ||
4be44fcd LB |
235 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
236 | tz->temperature)); | |
1da177e4 LT |
237 | |
238 | return_VALUE(0); | |
239 | } | |
240 | ||
4be44fcd | 241 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 242 | { |
4be44fcd | 243 | acpi_status status = AE_OK; |
1da177e4 LT |
244 | |
245 | ACPI_FUNCTION_TRACE("acpi_thermal_get_polling_frequency"); | |
246 | ||
247 | if (!tz) | |
248 | return_VALUE(-EINVAL); | |
249 | ||
4be44fcd LB |
250 | status = |
251 | acpi_evaluate_integer(tz->handle, "_TZP", NULL, | |
252 | &tz->polling_frequency); | |
1da177e4 LT |
253 | if (ACPI_FAILURE(status)) |
254 | return_VALUE(-ENODEV); | |
255 | ||
4be44fcd LB |
256 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
257 | tz->polling_frequency)); | |
1da177e4 LT |
258 | |
259 | return_VALUE(0); | |
260 | } | |
261 | ||
4be44fcd | 262 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 LT |
263 | { |
264 | ACPI_FUNCTION_TRACE("acpi_thermal_set_polling"); | |
265 | ||
266 | if (!tz) | |
267 | return_VALUE(-EINVAL); | |
268 | ||
269 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
270 | ||
4be44fcd LB |
271 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
272 | "Polling frequency set to %lu seconds\n", | |
273 | tz->polling_frequency)); | |
1da177e4 LT |
274 | |
275 | return_VALUE(0); | |
276 | } | |
277 | ||
4be44fcd | 278 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 279 | { |
4be44fcd LB |
280 | acpi_status status = AE_OK; |
281 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
282 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
283 | acpi_handle handle = NULL; | |
1da177e4 LT |
284 | |
285 | ACPI_FUNCTION_TRACE("acpi_thermal_set_cooling_mode"); | |
286 | ||
287 | if (!tz) | |
288 | return_VALUE(-EINVAL); | |
289 | ||
290 | status = acpi_get_handle(tz->handle, "_SCP", &handle); | |
291 | if (ACPI_FAILURE(status)) { | |
292 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
293 | return_VALUE(-ENODEV); | |
294 | } | |
295 | ||
296 | arg0.integer.value = mode; | |
297 | ||
298 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
299 | if (ACPI_FAILURE(status)) | |
300 | return_VALUE(-ENODEV); | |
301 | ||
302 | tz->cooling_mode = mode; | |
303 | ||
4be44fcd LB |
304 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling mode [%s]\n", |
305 | mode ? "passive" : "active")); | |
1da177e4 LT |
306 | |
307 | return_VALUE(0); | |
308 | } | |
309 | ||
4be44fcd | 310 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 311 | { |
4be44fcd LB |
312 | acpi_status status = AE_OK; |
313 | int i = 0; | |
1da177e4 LT |
314 | |
315 | ACPI_FUNCTION_TRACE("acpi_thermal_get_trip_points"); | |
316 | ||
317 | if (!tz) | |
318 | return_VALUE(-EINVAL); | |
319 | ||
320 | /* Critical Shutdown (required) */ | |
321 | ||
4be44fcd LB |
322 | status = acpi_evaluate_integer(tz->handle, "_CRT", NULL, |
323 | &tz->trips.critical.temperature); | |
1da177e4 LT |
324 | if (ACPI_FAILURE(status)) { |
325 | tz->trips.critical.flags.valid = 0; | |
326 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "No critical threshold\n")); | |
327 | return_VALUE(-ENODEV); | |
4be44fcd | 328 | } else { |
1da177e4 | 329 | tz->trips.critical.flags.valid = 1; |
4be44fcd LB |
330 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
331 | "Found critical threshold [%lu]\n", | |
332 | tz->trips.critical.temperature)); | |
1da177e4 LT |
333 | } |
334 | ||
335 | /* Critical Sleep (optional) */ | |
336 | ||
4be44fcd LB |
337 | status = |
338 | acpi_evaluate_integer(tz->handle, "_HOT", NULL, | |
339 | &tz->trips.hot.temperature); | |
1da177e4 LT |
340 | if (ACPI_FAILURE(status)) { |
341 | tz->trips.hot.flags.valid = 0; | |
342 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n")); | |
4be44fcd | 343 | } else { |
1da177e4 | 344 | tz->trips.hot.flags.valid = 1; |
4be44fcd LB |
345 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", |
346 | tz->trips.hot.temperature)); | |
1da177e4 LT |
347 | } |
348 | ||
349 | /* Passive: Processors (optional) */ | |
350 | ||
4be44fcd LB |
351 | status = |
352 | acpi_evaluate_integer(tz->handle, "_PSV", NULL, | |
353 | &tz->trips.passive.temperature); | |
1da177e4 LT |
354 | if (ACPI_FAILURE(status)) { |
355 | tz->trips.passive.flags.valid = 0; | |
356 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n")); | |
4be44fcd | 357 | } else { |
1da177e4 LT |
358 | tz->trips.passive.flags.valid = 1; |
359 | ||
4be44fcd LB |
360 | status = |
361 | acpi_evaluate_integer(tz->handle, "_TC1", NULL, | |
362 | &tz->trips.passive.tc1); | |
1da177e4 LT |
363 | if (ACPI_FAILURE(status)) |
364 | tz->trips.passive.flags.valid = 0; | |
365 | ||
4be44fcd LB |
366 | status = |
367 | acpi_evaluate_integer(tz->handle, "_TC2", NULL, | |
368 | &tz->trips.passive.tc2); | |
1da177e4 LT |
369 | if (ACPI_FAILURE(status)) |
370 | tz->trips.passive.flags.valid = 0; | |
371 | ||
4be44fcd LB |
372 | status = |
373 | acpi_evaluate_integer(tz->handle, "_TSP", NULL, | |
374 | &tz->trips.passive.tsp); | |
1da177e4 LT |
375 | if (ACPI_FAILURE(status)) |
376 | tz->trips.passive.flags.valid = 0; | |
377 | ||
4be44fcd LB |
378 | status = |
379 | acpi_evaluate_reference(tz->handle, "_PSL", NULL, | |
380 | &tz->trips.passive.devices); | |
1da177e4 LT |
381 | if (ACPI_FAILURE(status)) |
382 | tz->trips.passive.flags.valid = 0; | |
383 | ||
384 | if (!tz->trips.passive.flags.valid) | |
4be44fcd LB |
385 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, |
386 | "Invalid passive threshold\n")); | |
1da177e4 | 387 | else |
4be44fcd LB |
388 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
389 | "Found passive threshold [%lu]\n", | |
390 | tz->trips.passive.temperature)); | |
1da177e4 LT |
391 | } |
392 | ||
393 | /* Active: Fans, etc. (optional) */ | |
394 | ||
4be44fcd | 395 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 | 396 | |
4be44fcd | 397 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
1da177e4 | 398 | |
4be44fcd LB |
399 | status = |
400 | acpi_evaluate_integer(tz->handle, name, NULL, | |
401 | &tz->trips.active[i].temperature); | |
1da177e4 LT |
402 | if (ACPI_FAILURE(status)) |
403 | break; | |
404 | ||
405 | name[2] = 'L'; | |
4be44fcd LB |
406 | status = |
407 | acpi_evaluate_reference(tz->handle, name, NULL, | |
408 | &tz->trips.active[i].devices); | |
1da177e4 LT |
409 | if (ACPI_SUCCESS(status)) { |
410 | tz->trips.active[i].flags.valid = 1; | |
4be44fcd LB |
411 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
412 | "Found active threshold [%d]:[%lu]\n", | |
413 | i, tz->trips.active[i].temperature)); | |
414 | } else | |
415 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
416 | "Invalid active threshold [%d]\n", | |
417 | i)); | |
1da177e4 LT |
418 | } |
419 | ||
420 | return_VALUE(0); | |
421 | } | |
422 | ||
4be44fcd | 423 | static int acpi_thermal_get_devices(struct acpi_thermal *tz) |
1da177e4 | 424 | { |
4be44fcd | 425 | acpi_status status = AE_OK; |
1da177e4 LT |
426 | |
427 | ACPI_FUNCTION_TRACE("acpi_thermal_get_devices"); | |
428 | ||
429 | if (!tz) | |
430 | return_VALUE(-EINVAL); | |
431 | ||
4be44fcd LB |
432 | status = |
433 | acpi_evaluate_reference(tz->handle, "_TZD", NULL, &tz->devices); | |
1da177e4 LT |
434 | if (ACPI_FAILURE(status)) |
435 | return_VALUE(-ENODEV); | |
436 | ||
437 | return_VALUE(0); | |
438 | } | |
439 | ||
4be44fcd | 440 | static int acpi_thermal_call_usermode(char *path) |
1da177e4 | 441 | { |
4be44fcd LB |
442 | char *argv[2] = { NULL, NULL }; |
443 | char *envp[3] = { NULL, NULL, NULL }; | |
1da177e4 LT |
444 | |
445 | ACPI_FUNCTION_TRACE("acpi_thermal_call_usermode"); | |
446 | ||
447 | if (!path) | |
448 | return_VALUE(-EINVAL); | |
449 | ||
450 | argv[0] = path; | |
451 | ||
452 | /* minimal command environment */ | |
453 | envp[0] = "HOME=/"; | |
454 | envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
4be44fcd | 455 | |
1da177e4 LT |
456 | call_usermodehelper(argv[0], argv, envp, 0); |
457 | ||
458 | return_VALUE(0); | |
459 | } | |
460 | ||
4be44fcd | 461 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 462 | { |
4be44fcd LB |
463 | int result = 0; |
464 | struct acpi_device *device = NULL; | |
1da177e4 LT |
465 | |
466 | ACPI_FUNCTION_TRACE("acpi_thermal_critical"); | |
467 | ||
468 | if (!tz || !tz->trips.critical.flags.valid) | |
469 | return_VALUE(-EINVAL); | |
470 | ||
471 | if (tz->temperature >= tz->trips.critical.temperature) { | |
472 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Critical trip point\n")); | |
473 | tz->trips.critical.flags.enabled = 1; | |
4be44fcd | 474 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
475 | tz->trips.critical.flags.enabled = 0; |
476 | ||
477 | result = acpi_bus_get_device(tz->handle, &device); | |
478 | if (result) | |
479 | return_VALUE(result); | |
480 | ||
4be44fcd LB |
481 | printk(KERN_EMERG |
482 | "Critical temperature reached (%ld C), shutting down.\n", | |
483 | KELVIN_TO_CELSIUS(tz->temperature)); | |
484 | acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_CRITICAL, | |
485 | tz->trips.critical.flags.enabled); | |
1da177e4 LT |
486 | |
487 | acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF); | |
488 | ||
489 | return_VALUE(0); | |
490 | } | |
491 | ||
4be44fcd | 492 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 493 | { |
4be44fcd LB |
494 | int result = 0; |
495 | struct acpi_device *device = NULL; | |
1da177e4 LT |
496 | |
497 | ACPI_FUNCTION_TRACE("acpi_thermal_hot"); | |
498 | ||
499 | if (!tz || !tz->trips.hot.flags.valid) | |
500 | return_VALUE(-EINVAL); | |
501 | ||
502 | if (tz->temperature >= tz->trips.hot.temperature) { | |
503 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Hot trip point\n")); | |
504 | tz->trips.hot.flags.enabled = 1; | |
4be44fcd | 505 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
506 | tz->trips.hot.flags.enabled = 0; |
507 | ||
508 | result = acpi_bus_get_device(tz->handle, &device); | |
509 | if (result) | |
510 | return_VALUE(result); | |
511 | ||
4be44fcd LB |
512 | acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_HOT, |
513 | tz->trips.hot.flags.enabled); | |
1da177e4 LT |
514 | |
515 | /* TBD: Call user-mode "sleep(S4)" function */ | |
516 | ||
517 | return_VALUE(0); | |
518 | } | |
519 | ||
4be44fcd | 520 | static int acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 521 | { |
4be44fcd | 522 | int result = 0; |
1da177e4 | 523 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
524 | int trend = 0; |
525 | int i = 0; | |
1da177e4 LT |
526 | |
527 | ACPI_FUNCTION_TRACE("acpi_thermal_passive"); | |
528 | ||
529 | if (!tz || !tz->trips.passive.flags.valid) | |
530 | return_VALUE(-EINVAL); | |
531 | ||
532 | passive = &(tz->trips.passive); | |
533 | ||
534 | /* | |
535 | * Above Trip? | |
536 | * ----------- | |
537 | * Calculate the thermal trend (using the passive cooling equation) | |
538 | * and modify the performance limit for all passive cooling devices | |
539 | * accordingly. Note that we assume symmetry. | |
540 | */ | |
541 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
542 | trend = |
543 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
544 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
545 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
546 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
547 | trend, passive->tc1, tz->temperature, | |
548 | tz->last_temperature, passive->tc2, | |
549 | tz->temperature, passive->temperature)); | |
1da177e4 LT |
550 | tz->trips.passive.flags.enabled = 1; |
551 | /* Heating up? */ | |
552 | if (trend > 0) | |
4be44fcd LB |
553 | for (i = 0; i < passive->devices.count; i++) |
554 | acpi_processor_set_thermal_limit(passive-> | |
555 | devices. | |
556 | handles[i], | |
557 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 LT |
558 | /* Cooling off? */ |
559 | else if (trend < 0) | |
4be44fcd LB |
560 | for (i = 0; i < passive->devices.count; i++) |
561 | acpi_processor_set_thermal_limit(passive-> | |
562 | devices. | |
563 | handles[i], | |
564 | ACPI_PROCESSOR_LIMIT_DECREMENT); | |
1da177e4 LT |
565 | } |
566 | ||
567 | /* | |
568 | * Below Trip? | |
569 | * ----------- | |
570 | * Implement passive cooling hysteresis to slowly increase performance | |
571 | * and avoid thrashing around the passive trip point. Note that we | |
572 | * assume symmetry. | |
573 | */ | |
574 | else if (tz->trips.passive.flags.enabled) { | |
4be44fcd LB |
575 | for (i = 0; i < passive->devices.count; i++) |
576 | result = | |
577 | acpi_processor_set_thermal_limit(passive->devices. | |
578 | handles[i], | |
579 | ACPI_PROCESSOR_LIMIT_DECREMENT); | |
1da177e4 LT |
580 | if (result == 1) { |
581 | tz->trips.passive.flags.enabled = 0; | |
4be44fcd LB |
582 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
583 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 LT |
584 | } |
585 | } | |
586 | ||
587 | return_VALUE(0); | |
588 | } | |
589 | ||
4be44fcd | 590 | static int acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 591 | { |
4be44fcd | 592 | int result = 0; |
1da177e4 | 593 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
594 | int i = 0; |
595 | int j = 0; | |
596 | unsigned long maxtemp = 0; | |
1da177e4 LT |
597 | |
598 | ACPI_FUNCTION_TRACE("acpi_thermal_active"); | |
599 | ||
600 | if (!tz) | |
601 | return_VALUE(-EINVAL); | |
602 | ||
4be44fcd | 603 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
604 | |
605 | active = &(tz->trips.active[i]); | |
606 | if (!active || !active->flags.valid) | |
607 | break; | |
608 | ||
609 | /* | |
610 | * Above Threshold? | |
611 | * ---------------- | |
612 | * If not already enabled, turn ON all cooling devices | |
613 | * associated with this active threshold. | |
614 | */ | |
615 | if (tz->temperature >= active->temperature) { | |
616 | if (active->temperature > maxtemp) | |
4be44fcd LB |
617 | tz->state.active_index = i, maxtemp = |
618 | active->temperature; | |
1da177e4 LT |
619 | if (!active->flags.enabled) { |
620 | for (j = 0; j < active->devices.count; j++) { | |
4be44fcd LB |
621 | result = |
622 | acpi_bus_set_power(active->devices. | |
623 | handles[j], | |
624 | ACPI_STATE_D0); | |
1da177e4 | 625 | if (result) { |
4be44fcd LB |
626 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, |
627 | "Unable to turn cooling device [%p] 'on'\n", | |
628 | active-> | |
629 | devices. | |
630 | handles[j])); | |
1da177e4 LT |
631 | continue; |
632 | } | |
633 | active->flags.enabled = 1; | |
4be44fcd LB |
634 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
635 | "Cooling device [%p] now 'on'\n", | |
636 | active->devices. | |
637 | handles[j])); | |
1da177e4 LT |
638 | } |
639 | } | |
640 | } | |
641 | /* | |
642 | * Below Threshold? | |
643 | * ---------------- | |
644 | * Turn OFF all cooling devices associated with this | |
645 | * threshold. | |
646 | */ | |
647 | else if (active->flags.enabled) { | |
648 | for (j = 0; j < active->devices.count; j++) { | |
4be44fcd LB |
649 | result = |
650 | acpi_bus_set_power(active->devices. | |
651 | handles[j], | |
652 | ACPI_STATE_D3); | |
1da177e4 | 653 | if (result) { |
4be44fcd LB |
654 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, |
655 | "Unable to turn cooling device [%p] 'off'\n", | |
656 | active->devices. | |
657 | handles[j])); | |
1da177e4 LT |
658 | continue; |
659 | } | |
660 | active->flags.enabled = 0; | |
4be44fcd LB |
661 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
662 | "Cooling device [%p] now 'off'\n", | |
663 | active->devices.handles[j])); | |
1da177e4 LT |
664 | } |
665 | } | |
666 | } | |
667 | ||
668 | return_VALUE(0); | |
669 | } | |
670 | ||
4be44fcd | 671 | static void acpi_thermal_check(void *context); |
1da177e4 | 672 | |
4be44fcd | 673 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
674 | { |
675 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
676 | if (!tz->zombie) | |
4be44fcd LB |
677 | acpi_os_queue_for_execution(OSD_PRIORITY_GPE, |
678 | acpi_thermal_check, (void *)data); | |
1da177e4 LT |
679 | } |
680 | ||
4be44fcd | 681 | static void acpi_thermal_check(void *data) |
1da177e4 | 682 | { |
4be44fcd LB |
683 | int result = 0; |
684 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
685 | unsigned long sleep_time = 0; | |
686 | int i = 0; | |
1da177e4 LT |
687 | struct acpi_thermal_state state; |
688 | ||
689 | ACPI_FUNCTION_TRACE("acpi_thermal_check"); | |
690 | ||
691 | if (!tz) { | |
692 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid (NULL) context.\n")); | |
693 | return_VOID; | |
694 | } | |
695 | ||
696 | state = tz->state; | |
697 | ||
698 | result = acpi_thermal_get_temperature(tz); | |
699 | if (result) | |
700 | return_VOID; | |
4be44fcd | 701 | |
1da177e4 | 702 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 703 | |
1da177e4 LT |
704 | /* |
705 | * Check Trip Points | |
706 | * ----------------- | |
707 | * Compare the current temperature to the trip point values to see | |
708 | * if we've entered one of the thermal policy states. Note that | |
709 | * this function determines when a state is entered, but the | |
710 | * individual policy decides when it is exited (e.g. hysteresis). | |
711 | */ | |
712 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
713 | state.critical |= |
714 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
715 | if (tz->trips.hot.flags.valid) |
716 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
717 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
718 | state.passive |= |
719 | (tz->temperature >= tz->trips.passive.temperature); | |
720 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 721 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
722 | state.active |= |
723 | (tz->temperature >= | |
724 | tz->trips.active[i].temperature); | |
1da177e4 LT |
725 | |
726 | /* | |
727 | * Invoke Policy | |
728 | * ------------- | |
729 | * Separated from the above check to allow individual policy to | |
730 | * determine when to exit a given state. | |
731 | */ | |
732 | if (state.critical) | |
733 | acpi_thermal_critical(tz); | |
734 | if (state.hot) | |
735 | acpi_thermal_hot(tz); | |
736 | if (state.passive) | |
737 | acpi_thermal_passive(tz); | |
738 | if (state.active) | |
739 | acpi_thermal_active(tz); | |
740 | ||
741 | /* | |
742 | * Calculate State | |
743 | * --------------- | |
744 | * Again, separated from the above two to allow independent policy | |
745 | * decisions. | |
746 | */ | |
747 | if (tz->trips.critical.flags.enabled) | |
748 | tz->state.critical = 1; | |
749 | if (tz->trips.hot.flags.enabled) | |
750 | tz->state.hot = 1; | |
751 | if (tz->trips.passive.flags.enabled) | |
752 | tz->state.passive = 1; | |
4be44fcd | 753 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1da177e4 LT |
754 | if (tz->trips.active[i].flags.enabled) |
755 | tz->state.active = 1; | |
756 | ||
757 | /* | |
758 | * Calculate Sleep Time | |
759 | * -------------------- | |
760 | * If we're in the passive state, use _TSP's value. Otherwise | |
761 | * use the default polling frequency (e.g. _TZP). If no polling | |
762 | * frequency is specified then we'll wait forever (at least until | |
763 | * a thermal event occurs). Note that _TSP and _TZD values are | |
764 | * given in 1/10th seconds (we must covert to milliseconds). | |
765 | */ | |
766 | if (tz->state.passive) | |
767 | sleep_time = tz->trips.passive.tsp * 100; | |
768 | else if (tz->polling_frequency > 0) | |
769 | sleep_time = tz->polling_frequency * 100; | |
770 | ||
4be44fcd LB |
771 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
772 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
773 | |
774 | /* | |
775 | * Schedule Next Poll | |
776 | * ------------------ | |
777 | */ | |
778 | if (!sleep_time) { | |
779 | if (timer_pending(&(tz->timer))) | |
780 | del_timer(&(tz->timer)); | |
4be44fcd | 781 | } else { |
1da177e4 LT |
782 | if (timer_pending(&(tz->timer))) |
783 | mod_timer(&(tz->timer), (HZ * sleep_time) / 1000); | |
784 | else { | |
4be44fcd | 785 | tz->timer.data = (unsigned long)tz; |
1da177e4 LT |
786 | tz->timer.function = acpi_thermal_run; |
787 | tz->timer.expires = jiffies + (HZ * sleep_time) / 1000; | |
788 | add_timer(&(tz->timer)); | |
789 | } | |
790 | } | |
791 | ||
792 | return_VOID; | |
793 | } | |
794 | ||
1da177e4 LT |
795 | /* -------------------------------------------------------------------------- |
796 | FS Interface (/proc) | |
797 | -------------------------------------------------------------------------- */ | |
798 | ||
4be44fcd | 799 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
800 | |
801 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
802 | { | |
4be44fcd | 803 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 LT |
804 | |
805 | ACPI_FUNCTION_TRACE("acpi_thermal_state_seq_show"); | |
806 | ||
807 | if (!tz) | |
808 | goto end; | |
809 | ||
810 | seq_puts(seq, "state: "); | |
811 | ||
4be44fcd LB |
812 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
813 | && !tz->state.active) | |
1da177e4 LT |
814 | seq_puts(seq, "ok\n"); |
815 | else { | |
816 | if (tz->state.critical) | |
817 | seq_puts(seq, "critical "); | |
818 | if (tz->state.hot) | |
819 | seq_puts(seq, "hot "); | |
820 | if (tz->state.passive) | |
821 | seq_puts(seq, "passive "); | |
822 | if (tz->state.active) | |
823 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
824 | seq_puts(seq, "\n"); | |
825 | } | |
826 | ||
4be44fcd | 827 | end: |
1da177e4 LT |
828 | return_VALUE(0); |
829 | } | |
830 | ||
831 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
832 | { | |
833 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
834 | } | |
835 | ||
1da177e4 LT |
836 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
837 | { | |
4be44fcd LB |
838 | int result = 0; |
839 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; | |
1da177e4 LT |
840 | |
841 | ACPI_FUNCTION_TRACE("acpi_thermal_temp_seq_show"); | |
842 | ||
843 | if (!tz) | |
844 | goto end; | |
845 | ||
846 | result = acpi_thermal_get_temperature(tz); | |
847 | if (result) | |
848 | goto end; | |
849 | ||
4be44fcd LB |
850 | seq_printf(seq, "temperature: %ld C\n", |
851 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 852 | |
4be44fcd | 853 | end: |
1da177e4 LT |
854 | return_VALUE(0); |
855 | } | |
856 | ||
857 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
858 | { | |
859 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
860 | } | |
861 | ||
1da177e4 LT |
862 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
863 | { | |
4be44fcd LB |
864 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
865 | int i = 0; | |
866 | int j = 0; | |
1da177e4 LT |
867 | |
868 | ACPI_FUNCTION_TRACE("acpi_thermal_trip_seq_show"); | |
869 | ||
870 | if (!tz) | |
871 | goto end; | |
872 | ||
873 | if (tz->trips.critical.flags.valid) | |
874 | seq_printf(seq, "critical (S5): %ld C\n", | |
4be44fcd | 875 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature)); |
1da177e4 LT |
876 | |
877 | if (tz->trips.hot.flags.valid) | |
878 | seq_printf(seq, "hot (S4): %ld C\n", | |
4be44fcd | 879 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature)); |
1da177e4 LT |
880 | |
881 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
882 | seq_printf(seq, |
883 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
884 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
885 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
886 | tz->trips.passive.tsp); | |
887 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
888 | ||
889 | seq_printf(seq, "0x%p ", | |
890 | tz->trips.passive.devices.handles[j]); | |
1da177e4 LT |
891 | } |
892 | seq_puts(seq, "\n"); | |
893 | } | |
894 | ||
895 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
896 | if (!(tz->trips.active[i].flags.valid)) | |
897 | break; | |
898 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
899 | i, |
900 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
901 | for (j = 0; j < tz->trips.active[i].devices.count; j++) | |
1da177e4 | 902 | seq_printf(seq, "0x%p ", |
4be44fcd | 903 | tz->trips.active[i].devices.handles[j]); |
1da177e4 LT |
904 | seq_puts(seq, "\n"); |
905 | } | |
906 | ||
4be44fcd | 907 | end: |
1da177e4 LT |
908 | return_VALUE(0); |
909 | } | |
910 | ||
911 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
912 | { | |
913 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
914 | } | |
915 | ||
916 | static ssize_t | |
4be44fcd LB |
917 | acpi_thermal_write_trip_points(struct file *file, |
918 | const char __user * buffer, | |
919 | size_t count, loff_t * ppos) | |
1da177e4 | 920 | { |
4be44fcd LB |
921 | struct seq_file *m = (struct seq_file *)file->private_data; |
922 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
1da177e4 | 923 | |
4be44fcd LB |
924 | char *limit_string; |
925 | int num, critical, hot, passive; | |
926 | int *active; | |
927 | int i = 0; | |
1da177e4 LT |
928 | |
929 | ACPI_FUNCTION_TRACE("acpi_thermal_write_trip_points"); | |
930 | ||
931 | limit_string = kmalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL); | |
4be44fcd | 932 | if (!limit_string) |
1da177e4 LT |
933 | return_VALUE(-ENOMEM); |
934 | ||
935 | memset(limit_string, 0, ACPI_THERMAL_MAX_LIMIT_STR_LEN); | |
936 | ||
4be44fcd LB |
937 | active = kmalloc(ACPI_THERMAL_MAX_ACTIVE * sizeof(int), GFP_KERNEL); |
938 | if (!active) | |
1da177e4 LT |
939 | return_VALUE(-ENOMEM); |
940 | ||
941 | if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) { | |
942 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument\n")); | |
943 | count = -EINVAL; | |
944 | goto end; | |
945 | } | |
4be44fcd | 946 | |
1da177e4 LT |
947 | if (copy_from_user(limit_string, buffer, count)) { |
948 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data\n")); | |
949 | count = -EFAULT; | |
950 | goto end; | |
951 | } | |
4be44fcd | 952 | |
1da177e4 LT |
953 | limit_string[count] = '\0'; |
954 | ||
955 | num = sscanf(limit_string, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d", | |
4be44fcd LB |
956 | &critical, &hot, &passive, |
957 | &active[0], &active[1], &active[2], &active[3], &active[4], | |
958 | &active[5], &active[6], &active[7], &active[8], | |
959 | &active[9]); | |
960 | if (!(num >= 5 && num < (ACPI_THERMAL_MAX_ACTIVE + 3))) { | |
1da177e4 LT |
961 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data format\n")); |
962 | count = -EINVAL; | |
963 | goto end; | |
964 | } | |
965 | ||
966 | tz->trips.critical.temperature = CELSIUS_TO_KELVIN(critical); | |
967 | tz->trips.hot.temperature = CELSIUS_TO_KELVIN(hot); | |
968 | tz->trips.passive.temperature = CELSIUS_TO_KELVIN(passive); | |
969 | for (i = 0; i < num - 3; i++) { | |
970 | if (!(tz->trips.active[i].flags.valid)) | |
971 | break; | |
972 | tz->trips.active[i].temperature = CELSIUS_TO_KELVIN(active[i]); | |
973 | } | |
4be44fcd LB |
974 | |
975 | end: | |
1da177e4 LT |
976 | kfree(active); |
977 | kfree(limit_string); | |
978 | return_VALUE(count); | |
979 | } | |
980 | ||
1da177e4 LT |
981 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
982 | { | |
4be44fcd | 983 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 LT |
984 | |
985 | ACPI_FUNCTION_TRACE("acpi_thermal_cooling_seq_show"); | |
986 | ||
987 | if (!tz) | |
988 | goto end; | |
989 | ||
990 | if (!tz->flags.cooling_mode) { | |
991 | seq_puts(seq, "<setting not supported>\n"); | |
992 | } | |
993 | ||
4be44fcd | 994 | if (tz->cooling_mode == ACPI_THERMAL_MODE_CRITICAL) |
1da177e4 LT |
995 | seq_printf(seq, "cooling mode: critical\n"); |
996 | else | |
997 | seq_printf(seq, "cooling mode: %s\n", | |
4be44fcd | 998 | tz->cooling_mode ? "passive" : "active"); |
1da177e4 | 999 | |
4be44fcd | 1000 | end: |
1da177e4 LT |
1001 | return_VALUE(0); |
1002 | } | |
1003 | ||
1004 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
1005 | { | |
1006 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 1007 | PDE(inode)->data); |
1da177e4 LT |
1008 | } |
1009 | ||
1010 | static ssize_t | |
4be44fcd LB |
1011 | acpi_thermal_write_cooling_mode(struct file *file, |
1012 | const char __user * buffer, | |
1013 | size_t count, loff_t * ppos) | |
1da177e4 | 1014 | { |
4be44fcd LB |
1015 | struct seq_file *m = (struct seq_file *)file->private_data; |
1016 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
1017 | int result = 0; | |
1018 | char mode_string[12] = { '\0' }; | |
1da177e4 LT |
1019 | |
1020 | ACPI_FUNCTION_TRACE("acpi_thermal_write_cooling_mode"); | |
1021 | ||
1022 | if (!tz || (count > sizeof(mode_string) - 1)) | |
1023 | return_VALUE(-EINVAL); | |
1024 | ||
1025 | if (!tz->flags.cooling_mode) | |
1026 | return_VALUE(-ENODEV); | |
1027 | ||
1028 | if (copy_from_user(mode_string, buffer, count)) | |
1029 | return_VALUE(-EFAULT); | |
4be44fcd | 1030 | |
1da177e4 | 1031 | mode_string[count] = '\0'; |
4be44fcd LB |
1032 | |
1033 | result = acpi_thermal_set_cooling_mode(tz, | |
1034 | simple_strtoul(mode_string, NULL, | |
1035 | 0)); | |
1da177e4 LT |
1036 | if (result) |
1037 | return_VALUE(result); | |
1038 | ||
1039 | acpi_thermal_check(tz); | |
1040 | ||
1041 | return_VALUE(count); | |
1042 | } | |
1043 | ||
1da177e4 LT |
1044 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
1045 | { | |
4be44fcd | 1046 | struct acpi_thermal *tz = (struct acpi_thermal *)seq->private; |
1da177e4 LT |
1047 | |
1048 | ACPI_FUNCTION_TRACE("acpi_thermal_polling_seq_show"); | |
1049 | ||
1050 | if (!tz) | |
1051 | goto end; | |
1052 | ||
1053 | if (!tz->polling_frequency) { | |
1054 | seq_puts(seq, "<polling disabled>\n"); | |
1055 | goto end; | |
1056 | } | |
1057 | ||
1058 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 1059 | (tz->polling_frequency / 10)); |
1da177e4 | 1060 | |
4be44fcd | 1061 | end: |
1da177e4 LT |
1062 | return_VALUE(0); |
1063 | } | |
1064 | ||
1065 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1066 | { | |
1067 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1068 | PDE(inode)->data); |
1da177e4 LT |
1069 | } |
1070 | ||
1071 | static ssize_t | |
4be44fcd LB |
1072 | acpi_thermal_write_polling(struct file *file, |
1073 | const char __user * buffer, | |
1074 | size_t count, loff_t * ppos) | |
1da177e4 | 1075 | { |
4be44fcd LB |
1076 | struct seq_file *m = (struct seq_file *)file->private_data; |
1077 | struct acpi_thermal *tz = (struct acpi_thermal *)m->private; | |
1078 | int result = 0; | |
1079 | char polling_string[12] = { '\0' }; | |
1080 | int seconds = 0; | |
1da177e4 LT |
1081 | |
1082 | ACPI_FUNCTION_TRACE("acpi_thermal_write_polling"); | |
1083 | ||
1084 | if (!tz || (count > sizeof(polling_string) - 1)) | |
1085 | return_VALUE(-EINVAL); | |
4be44fcd | 1086 | |
1da177e4 LT |
1087 | if (copy_from_user(polling_string, buffer, count)) |
1088 | return_VALUE(-EFAULT); | |
4be44fcd | 1089 | |
1da177e4 LT |
1090 | polling_string[count] = '\0'; |
1091 | ||
1092 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1093 | |
1da177e4 LT |
1094 | result = acpi_thermal_set_polling(tz, seconds); |
1095 | if (result) | |
1096 | return_VALUE(result); | |
1097 | ||
1098 | acpi_thermal_check(tz); | |
1099 | ||
1100 | return_VALUE(count); | |
1101 | } | |
1102 | ||
4be44fcd | 1103 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1104 | { |
4be44fcd | 1105 | struct proc_dir_entry *entry = NULL; |
1da177e4 LT |
1106 | |
1107 | ACPI_FUNCTION_TRACE("acpi_thermal_add_fs"); | |
1108 | ||
1109 | if (!acpi_device_dir(device)) { | |
1110 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1111 | acpi_thermal_dir); |
1da177e4 LT |
1112 | if (!acpi_device_dir(device)) |
1113 | return_VALUE(-ENODEV); | |
1114 | acpi_device_dir(device)->owner = THIS_MODULE; | |
1115 | } | |
1116 | ||
1117 | /* 'state' [R] */ | |
1118 | entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, | |
4be44fcd | 1119 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 LT |
1120 | if (!entry) |
1121 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
4be44fcd LB |
1122 | "Unable to create '%s' fs entry\n", |
1123 | ACPI_THERMAL_FILE_STATE)); | |
1da177e4 LT |
1124 | else { |
1125 | entry->proc_fops = &acpi_thermal_state_fops; | |
1126 | entry->data = acpi_driver_data(device); | |
1127 | entry->owner = THIS_MODULE; | |
1128 | } | |
1129 | ||
1130 | /* 'temperature' [R] */ | |
1131 | entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
4be44fcd | 1132 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 LT |
1133 | if (!entry) |
1134 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
4be44fcd LB |
1135 | "Unable to create '%s' fs entry\n", |
1136 | ACPI_THERMAL_FILE_TEMPERATURE)); | |
1da177e4 LT |
1137 | else { |
1138 | entry->proc_fops = &acpi_thermal_temp_fops; | |
1139 | entry->data = acpi_driver_data(device); | |
1140 | entry->owner = THIS_MODULE; | |
1141 | } | |
1142 | ||
1143 | /* 'trip_points' [R/W] */ | |
1144 | entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
4be44fcd LB |
1145 | S_IFREG | S_IRUGO | S_IWUSR, |
1146 | acpi_device_dir(device)); | |
1da177e4 LT |
1147 | if (!entry) |
1148 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
4be44fcd LB |
1149 | "Unable to create '%s' fs entry\n", |
1150 | ACPI_THERMAL_FILE_TRIP_POINTS)); | |
1da177e4 LT |
1151 | else { |
1152 | entry->proc_fops = &acpi_thermal_trip_fops; | |
1153 | entry->data = acpi_driver_data(device); | |
1154 | entry->owner = THIS_MODULE; | |
1155 | } | |
1156 | ||
1157 | /* 'cooling_mode' [R/W] */ | |
1158 | entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
4be44fcd LB |
1159 | S_IFREG | S_IRUGO | S_IWUSR, |
1160 | acpi_device_dir(device)); | |
1da177e4 LT |
1161 | if (!entry) |
1162 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
4be44fcd LB |
1163 | "Unable to create '%s' fs entry\n", |
1164 | ACPI_THERMAL_FILE_COOLING_MODE)); | |
1da177e4 LT |
1165 | else { |
1166 | entry->proc_fops = &acpi_thermal_cooling_fops; | |
1167 | entry->data = acpi_driver_data(device); | |
1168 | entry->owner = THIS_MODULE; | |
1169 | } | |
1170 | ||
1171 | /* 'polling_frequency' [R/W] */ | |
1172 | entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
4be44fcd LB |
1173 | S_IFREG | S_IRUGO | S_IWUSR, |
1174 | acpi_device_dir(device)); | |
1da177e4 LT |
1175 | if (!entry) |
1176 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
4be44fcd LB |
1177 | "Unable to create '%s' fs entry\n", |
1178 | ACPI_THERMAL_FILE_POLLING_FREQ)); | |
1da177e4 LT |
1179 | else { |
1180 | entry->proc_fops = &acpi_thermal_polling_fops; | |
1181 | entry->data = acpi_driver_data(device); | |
1182 | entry->owner = THIS_MODULE; | |
1183 | } | |
1184 | ||
1185 | return_VALUE(0); | |
1186 | } | |
1187 | ||
4be44fcd | 1188 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 LT |
1189 | { |
1190 | ACPI_FUNCTION_TRACE("acpi_thermal_remove_fs"); | |
1191 | ||
1192 | if (acpi_device_dir(device)) { | |
1193 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1194 | acpi_device_dir(device)); | |
1195 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1196 | acpi_device_dir(device)); | |
1197 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1198 | acpi_device_dir(device)); | |
1199 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1200 | acpi_device_dir(device)); | |
1201 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1202 | acpi_device_dir(device)); | |
1203 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1204 | acpi_device_dir(device) = NULL; | |
1205 | } | |
1206 | ||
1207 | return_VALUE(0); | |
1208 | } | |
1209 | ||
1da177e4 LT |
1210 | /* -------------------------------------------------------------------------- |
1211 | Driver Interface | |
1212 | -------------------------------------------------------------------------- */ | |
1213 | ||
4be44fcd | 1214 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1215 | { |
4be44fcd LB |
1216 | struct acpi_thermal *tz = (struct acpi_thermal *)data; |
1217 | struct acpi_device *device = NULL; | |
1da177e4 LT |
1218 | |
1219 | ACPI_FUNCTION_TRACE("acpi_thermal_notify"); | |
1220 | ||
1221 | if (!tz) | |
1222 | return_VOID; | |
1223 | ||
1224 | if (acpi_bus_get_device(tz->handle, &device)) | |
1225 | return_VOID; | |
1226 | ||
1227 | switch (event) { | |
1228 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1229 | acpi_thermal_check(tz); | |
1230 | break; | |
1231 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
1232 | acpi_thermal_get_trip_points(tz); | |
1233 | acpi_thermal_check(tz); | |
1234 | acpi_bus_generate_event(device, event, 0); | |
1235 | break; | |
1236 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
1237 | if (tz->flags.devices) | |
1238 | acpi_thermal_get_devices(tz); | |
1239 | acpi_bus_generate_event(device, event, 0); | |
1240 | break; | |
1241 | default: | |
1242 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1243 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1244 | break; |
1245 | } | |
1246 | ||
1247 | return_VOID; | |
1248 | } | |
1249 | ||
4be44fcd | 1250 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1251 | { |
4be44fcd | 1252 | int result = 0; |
1da177e4 LT |
1253 | |
1254 | ACPI_FUNCTION_TRACE("acpi_thermal_get_info"); | |
1255 | ||
1256 | if (!tz) | |
1257 | return_VALUE(-EINVAL); | |
1258 | ||
1259 | /* Get temperature [_TMP] (required) */ | |
1260 | result = acpi_thermal_get_temperature(tz); | |
1261 | if (result) | |
1262 | return_VALUE(result); | |
1263 | ||
1264 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1265 | result = acpi_thermal_get_trip_points(tz); | |
1266 | if (result) | |
1267 | return_VALUE(result); | |
1268 | ||
1269 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1270 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1271 | if (!result) |
1da177e4 | 1272 | tz->flags.cooling_mode = 1; |
4be44fcd | 1273 | else { |
1da177e4 | 1274 | /* Oh,we have not _SCP method. |
4be44fcd | 1275 | Generally show cooling_mode by _ACx, _PSV,spec 12.2 */ |
1da177e4 | 1276 | tz->flags.cooling_mode = 0; |
4be44fcd LB |
1277 | if (tz->trips.active[0].flags.valid |
1278 | && tz->trips.passive.flags.valid) { | |
1279 | if (tz->trips.passive.temperature > | |
1280 | tz->trips.active[0].temperature) | |
1da177e4 | 1281 | tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; |
4be44fcd | 1282 | else |
1da177e4 | 1283 | tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; |
4be44fcd LB |
1284 | } else if (!tz->trips.active[0].flags.valid |
1285 | && tz->trips.passive.flags.valid) { | |
1da177e4 | 1286 | tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE; |
4be44fcd LB |
1287 | } else if (tz->trips.active[0].flags.valid |
1288 | && !tz->trips.passive.flags.valid) { | |
1da177e4 LT |
1289 | tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE; |
1290 | } else { | |
1291 | /* _ACx and _PSV are optional, but _CRT is required */ | |
1292 | tz->cooling_mode = ACPI_THERMAL_MODE_CRITICAL; | |
1293 | } | |
1294 | } | |
1295 | ||
1296 | /* Get default polling frequency [_TZP] (optional) */ | |
1297 | if (tzp) | |
1298 | tz->polling_frequency = tzp; | |
1299 | else | |
1300 | acpi_thermal_get_polling_frequency(tz); | |
1301 | ||
1302 | /* Get devices in this thermal zone [_TZD] (optional) */ | |
1303 | result = acpi_thermal_get_devices(tz); | |
1304 | if (!result) | |
1305 | tz->flags.devices = 1; | |
1306 | ||
1307 | return_VALUE(0); | |
1308 | } | |
1309 | ||
4be44fcd | 1310 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1311 | { |
4be44fcd LB |
1312 | int result = 0; |
1313 | acpi_status status = AE_OK; | |
1314 | struct acpi_thermal *tz = NULL; | |
1da177e4 LT |
1315 | |
1316 | ACPI_FUNCTION_TRACE("acpi_thermal_add"); | |
1317 | ||
1318 | if (!device) | |
1319 | return_VALUE(-EINVAL); | |
1320 | ||
1321 | tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL); | |
1322 | if (!tz) | |
1323 | return_VALUE(-ENOMEM); | |
1324 | memset(tz, 0, sizeof(struct acpi_thermal)); | |
1325 | ||
1326 | tz->handle = device->handle; | |
1327 | strcpy(tz->name, device->pnp.bus_id); | |
1328 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1329 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
1330 | acpi_driver_data(device) = tz; | |
1331 | ||
1332 | result = acpi_thermal_get_info(tz); | |
1333 | if (result) | |
1334 | goto end; | |
1335 | ||
1336 | result = acpi_thermal_add_fs(device); | |
1337 | if (result) | |
1338 | return_VALUE(result); | |
1339 | ||
1340 | init_timer(&tz->timer); | |
1341 | ||
1342 | acpi_thermal_check(tz); | |
1343 | ||
1344 | status = acpi_install_notify_handler(tz->handle, | |
4be44fcd LB |
1345 | ACPI_DEVICE_NOTIFY, |
1346 | acpi_thermal_notify, tz); | |
1da177e4 LT |
1347 | if (ACPI_FAILURE(status)) { |
1348 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
4be44fcd | 1349 | "Error installing notify handler\n")); |
1da177e4 LT |
1350 | result = -ENODEV; |
1351 | goto end; | |
1352 | } | |
1353 | ||
1354 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1355 | acpi_device_name(device), acpi_device_bid(device), |
1356 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1357 | |
4be44fcd | 1358 | end: |
1da177e4 LT |
1359 | if (result) { |
1360 | acpi_thermal_remove_fs(device); | |
1361 | kfree(tz); | |
1362 | } | |
1363 | ||
1364 | return_VALUE(result); | |
1365 | } | |
1366 | ||
4be44fcd | 1367 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1368 | { |
4be44fcd LB |
1369 | acpi_status status = AE_OK; |
1370 | struct acpi_thermal *tz = NULL; | |
1da177e4 LT |
1371 | |
1372 | ACPI_FUNCTION_TRACE("acpi_thermal_remove"); | |
1373 | ||
1374 | if (!device || !acpi_driver_data(device)) | |
1375 | return_VALUE(-EINVAL); | |
1376 | ||
4be44fcd | 1377 | tz = (struct acpi_thermal *)acpi_driver_data(device); |
1da177e4 LT |
1378 | |
1379 | /* avoid timer adding new defer task */ | |
1380 | tz->zombie = 1; | |
1381 | /* wait for running timer (on other CPUs) finish */ | |
1382 | del_timer_sync(&(tz->timer)); | |
1383 | /* synchronize deferred task */ | |
1384 | acpi_os_wait_events_complete(NULL); | |
1385 | /* deferred task may reinsert timer */ | |
1386 | del_timer_sync(&(tz->timer)); | |
1387 | ||
1388 | status = acpi_remove_notify_handler(tz->handle, | |
4be44fcd LB |
1389 | ACPI_DEVICE_NOTIFY, |
1390 | acpi_thermal_notify); | |
1da177e4 LT |
1391 | if (ACPI_FAILURE(status)) |
1392 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
4be44fcd | 1393 | "Error removing notify handler\n")); |
1da177e4 LT |
1394 | |
1395 | /* Terminate policy */ | |
4be44fcd | 1396 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1397 | tz->trips.passive.flags.enabled = 0; |
1398 | acpi_thermal_passive(tz); | |
1399 | } | |
1400 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1401 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1402 | tz->trips.active[0].flags.enabled = 0; |
1403 | acpi_thermal_active(tz); | |
1404 | } | |
1405 | ||
1406 | acpi_thermal_remove_fs(device); | |
1407 | ||
1408 | kfree(tz); | |
1409 | return_VALUE(0); | |
1410 | } | |
1411 | ||
4be44fcd | 1412 | static int __init acpi_thermal_init(void) |
1da177e4 | 1413 | { |
4be44fcd | 1414 | int result = 0; |
1da177e4 LT |
1415 | |
1416 | ACPI_FUNCTION_TRACE("acpi_thermal_init"); | |
1417 | ||
1418 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1419 | if (!acpi_thermal_dir) | |
1420 | return_VALUE(-ENODEV); | |
1421 | acpi_thermal_dir->owner = THIS_MODULE; | |
1422 | ||
1423 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1424 | if (result < 0) { | |
1425 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1426 | return_VALUE(-ENODEV); | |
1427 | } | |
1428 | ||
1429 | return_VALUE(0); | |
1430 | } | |
1431 | ||
4be44fcd | 1432 | static void __exit acpi_thermal_exit(void) |
1da177e4 LT |
1433 | { |
1434 | ACPI_FUNCTION_TRACE("acpi_thermal_exit"); | |
1435 | ||
1436 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1437 | ||
1438 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1439 | ||
1440 | return_VOID; | |
1441 | } | |
1442 | ||
1da177e4 LT |
1443 | module_init(acpi_thermal_init); |
1444 | module_exit(acpi_thermal_exit); |