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203d3d4a ZR |
1 | /* |
2 | * thermal.c - Generic Thermal Management Sysfs support. | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp | |
5 | * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com> | |
6 | * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; version 2 of the License. | |
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/module.h> | |
27 | #include <linux/device.h> | |
28 | #include <linux/err.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
203d3d4a ZR |
30 | #include <linux/kdev_t.h> |
31 | #include <linux/idr.h> | |
32 | #include <linux/thermal.h> | |
33 | #include <linux/spinlock.h> | |
b1569e99 | 34 | #include <linux/reboot.h> |
4cb18728 D |
35 | #include <net/netlink.h> |
36 | #include <net/genetlink.h> | |
203d3d4a | 37 | |
63c4ec90 | 38 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a ZR |
39 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
40 | MODULE_LICENSE("GPL"); | |
41 | ||
42 | #define PREFIX "Thermal: " | |
43 | ||
44 | struct thermal_cooling_device_instance { | |
45 | int id; | |
46 | char name[THERMAL_NAME_LENGTH]; | |
47 | struct thermal_zone_device *tz; | |
48 | struct thermal_cooling_device *cdev; | |
49 | int trip; | |
50 | char attr_name[THERMAL_NAME_LENGTH]; | |
51 | struct device_attribute attr; | |
52 | struct list_head node; | |
53 | }; | |
54 | ||
55 | static DEFINE_IDR(thermal_tz_idr); | |
56 | static DEFINE_IDR(thermal_cdev_idr); | |
57 | static DEFINE_MUTEX(thermal_idr_lock); | |
58 | ||
59 | static LIST_HEAD(thermal_tz_list); | |
60 | static LIST_HEAD(thermal_cdev_list); | |
61 | static DEFINE_MUTEX(thermal_list_lock); | |
62 | ||
63 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
64 | { | |
65 | int err; | |
66 | ||
67 | again: | |
68 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) | |
69 | return -ENOMEM; | |
70 | ||
71 | if (lock) | |
72 | mutex_lock(lock); | |
73 | err = idr_get_new(idr, NULL, id); | |
74 | if (lock) | |
75 | mutex_unlock(lock); | |
76 | if (unlikely(err == -EAGAIN)) | |
77 | goto again; | |
78 | else if (unlikely(err)) | |
79 | return err; | |
80 | ||
81 | *id = *id & MAX_ID_MASK; | |
82 | return 0; | |
83 | } | |
84 | ||
85 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
86 | { | |
87 | if (lock) | |
88 | mutex_lock(lock); | |
89 | idr_remove(idr, id); | |
90 | if (lock) | |
91 | mutex_unlock(lock); | |
92 | } | |
93 | ||
94 | /* sys I/F for thermal zone */ | |
95 | ||
96 | #define to_thermal_zone(_dev) \ | |
97 | container_of(_dev, struct thermal_zone_device, device) | |
98 | ||
99 | static ssize_t | |
100 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
101 | { | |
102 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
103 | ||
104 | return sprintf(buf, "%s\n", tz->type); | |
105 | } | |
106 | ||
107 | static ssize_t | |
108 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
109 | { | |
110 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
111 | long temperature; |
112 | int ret; | |
203d3d4a ZR |
113 | |
114 | if (!tz->ops->get_temp) | |
115 | return -EPERM; | |
116 | ||
6503e5df MG |
117 | ret = tz->ops->get_temp(tz, &temperature); |
118 | ||
119 | if (ret) | |
120 | return ret; | |
121 | ||
122 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
123 | } |
124 | ||
125 | static ssize_t | |
126 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
127 | { | |
128 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
129 | enum thermal_device_mode mode; |
130 | int result; | |
203d3d4a ZR |
131 | |
132 | if (!tz->ops->get_mode) | |
133 | return -EPERM; | |
134 | ||
6503e5df MG |
135 | result = tz->ops->get_mode(tz, &mode); |
136 | if (result) | |
137 | return result; | |
138 | ||
139 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
140 | : "disabled"); | |
203d3d4a ZR |
141 | } |
142 | ||
143 | static ssize_t | |
144 | mode_store(struct device *dev, struct device_attribute *attr, | |
145 | const char *buf, size_t count) | |
146 | { | |
147 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
148 | int result; | |
149 | ||
150 | if (!tz->ops->set_mode) | |
151 | return -EPERM; | |
152 | ||
6503e5df MG |
153 | if (!strncmp(buf, "enabled", sizeof("enabled"))) |
154 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); | |
155 | else if (!strncmp(buf, "disabled", sizeof("disabled"))) | |
156 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); | |
157 | else | |
158 | result = -EINVAL; | |
159 | ||
203d3d4a ZR |
160 | if (result) |
161 | return result; | |
162 | ||
163 | return count; | |
164 | } | |
165 | ||
166 | static ssize_t | |
167 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
168 | char *buf) | |
169 | { | |
170 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
171 | enum thermal_trip_type type; |
172 | int trip, result; | |
203d3d4a ZR |
173 | |
174 | if (!tz->ops->get_trip_type) | |
175 | return -EPERM; | |
176 | ||
177 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
178 | return -EINVAL; | |
179 | ||
6503e5df MG |
180 | result = tz->ops->get_trip_type(tz, trip, &type); |
181 | if (result) | |
182 | return result; | |
183 | ||
184 | switch (type) { | |
185 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 186 | return sprintf(buf, "critical\n"); |
6503e5df | 187 | case THERMAL_TRIP_HOT: |
625120a4 | 188 | return sprintf(buf, "hot\n"); |
6503e5df | 189 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 190 | return sprintf(buf, "passive\n"); |
6503e5df | 191 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 192 | return sprintf(buf, "active\n"); |
6503e5df | 193 | default: |
625120a4 | 194 | return sprintf(buf, "unknown\n"); |
6503e5df | 195 | } |
203d3d4a ZR |
196 | } |
197 | ||
198 | static ssize_t | |
199 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
200 | char *buf) | |
201 | { | |
202 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
203 | int trip, ret; |
204 | long temperature; | |
203d3d4a ZR |
205 | |
206 | if (!tz->ops->get_trip_temp) | |
207 | return -EPERM; | |
208 | ||
209 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
210 | return -EINVAL; | |
211 | ||
6503e5df MG |
212 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
213 | ||
214 | if (ret) | |
215 | return ret; | |
216 | ||
217 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
218 | } |
219 | ||
03a971a2 MG |
220 | static ssize_t |
221 | passive_store(struct device *dev, struct device_attribute *attr, | |
222 | const char *buf, size_t count) | |
223 | { | |
224 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
225 | struct thermal_cooling_device *cdev = NULL; | |
226 | int state; | |
227 | ||
228 | if (!sscanf(buf, "%d\n", &state)) | |
229 | return -EINVAL; | |
230 | ||
3d8e3ad8 FP |
231 | /* sanity check: values below 1000 millicelcius don't make sense |
232 | * and can cause the system to go into a thermal heart attack | |
233 | */ | |
234 | if (state && state < 1000) | |
235 | return -EINVAL; | |
236 | ||
03a971a2 MG |
237 | if (state && !tz->forced_passive) { |
238 | mutex_lock(&thermal_list_lock); | |
239 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
240 | if (!strncmp("Processor", cdev->type, | |
241 | sizeof("Processor"))) | |
242 | thermal_zone_bind_cooling_device(tz, | |
243 | THERMAL_TRIPS_NONE, | |
244 | cdev); | |
245 | } | |
246 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
247 | if (!tz->passive_delay) |
248 | tz->passive_delay = 1000; | |
03a971a2 MG |
249 | } else if (!state && tz->forced_passive) { |
250 | mutex_lock(&thermal_list_lock); | |
251 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
252 | if (!strncmp("Processor", cdev->type, | |
253 | sizeof("Processor"))) | |
254 | thermal_zone_unbind_cooling_device(tz, | |
255 | THERMAL_TRIPS_NONE, | |
256 | cdev); | |
257 | } | |
258 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 259 | tz->passive_delay = 0; |
03a971a2 MG |
260 | } |
261 | ||
262 | tz->tc1 = 1; | |
263 | tz->tc2 = 1; | |
264 | ||
03a971a2 MG |
265 | tz->forced_passive = state; |
266 | ||
267 | thermal_zone_device_update(tz); | |
268 | ||
269 | return count; | |
270 | } | |
271 | ||
272 | static ssize_t | |
273 | passive_show(struct device *dev, struct device_attribute *attr, | |
274 | char *buf) | |
275 | { | |
276 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
277 | ||
278 | return sprintf(buf, "%d\n", tz->forced_passive); | |
279 | } | |
280 | ||
203d3d4a ZR |
281 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
282 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
283 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
03a971a2 MG |
284 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, \ |
285 | passive_store); | |
203d3d4a ZR |
286 | |
287 | static struct device_attribute trip_point_attrs[] = { | |
288 | __ATTR(trip_point_0_type, 0444, trip_point_type_show, NULL), | |
289 | __ATTR(trip_point_0_temp, 0444, trip_point_temp_show, NULL), | |
290 | __ATTR(trip_point_1_type, 0444, trip_point_type_show, NULL), | |
291 | __ATTR(trip_point_1_temp, 0444, trip_point_temp_show, NULL), | |
292 | __ATTR(trip_point_2_type, 0444, trip_point_type_show, NULL), | |
293 | __ATTR(trip_point_2_temp, 0444, trip_point_temp_show, NULL), | |
294 | __ATTR(trip_point_3_type, 0444, trip_point_type_show, NULL), | |
295 | __ATTR(trip_point_3_temp, 0444, trip_point_temp_show, NULL), | |
296 | __ATTR(trip_point_4_type, 0444, trip_point_type_show, NULL), | |
297 | __ATTR(trip_point_4_temp, 0444, trip_point_temp_show, NULL), | |
298 | __ATTR(trip_point_5_type, 0444, trip_point_type_show, NULL), | |
299 | __ATTR(trip_point_5_temp, 0444, trip_point_temp_show, NULL), | |
300 | __ATTR(trip_point_6_type, 0444, trip_point_type_show, NULL), | |
301 | __ATTR(trip_point_6_temp, 0444, trip_point_temp_show, NULL), | |
302 | __ATTR(trip_point_7_type, 0444, trip_point_type_show, NULL), | |
303 | __ATTR(trip_point_7_temp, 0444, trip_point_temp_show, NULL), | |
304 | __ATTR(trip_point_8_type, 0444, trip_point_type_show, NULL), | |
305 | __ATTR(trip_point_8_temp, 0444, trip_point_temp_show, NULL), | |
306 | __ATTR(trip_point_9_type, 0444, trip_point_type_show, NULL), | |
307 | __ATTR(trip_point_9_temp, 0444, trip_point_temp_show, NULL), | |
5f1a3f2a KH |
308 | __ATTR(trip_point_10_type, 0444, trip_point_type_show, NULL), |
309 | __ATTR(trip_point_10_temp, 0444, trip_point_temp_show, NULL), | |
310 | __ATTR(trip_point_11_type, 0444, trip_point_type_show, NULL), | |
311 | __ATTR(trip_point_11_temp, 0444, trip_point_temp_show, NULL), | |
203d3d4a ZR |
312 | }; |
313 | ||
314 | #define TRIP_POINT_ATTR_ADD(_dev, _index, result) \ | |
315 | do { \ | |
316 | result = device_create_file(_dev, \ | |
317 | &trip_point_attrs[_index * 2]); \ | |
318 | if (result) \ | |
319 | break; \ | |
320 | result = device_create_file(_dev, \ | |
321 | &trip_point_attrs[_index * 2 + 1]); \ | |
322 | } while (0) | |
323 | ||
324 | #define TRIP_POINT_ATTR_REMOVE(_dev, _index) \ | |
325 | do { \ | |
326 | device_remove_file(_dev, &trip_point_attrs[_index * 2]); \ | |
327 | device_remove_file(_dev, &trip_point_attrs[_index * 2 + 1]); \ | |
328 | } while (0) | |
329 | ||
330 | /* sys I/F for cooling device */ | |
331 | #define to_cooling_device(_dev) \ | |
332 | container_of(_dev, struct thermal_cooling_device, device) | |
333 | ||
334 | static ssize_t | |
335 | thermal_cooling_device_type_show(struct device *dev, | |
336 | struct device_attribute *attr, char *buf) | |
337 | { | |
338 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
339 | ||
340 | return sprintf(buf, "%s\n", cdev->type); | |
341 | } | |
342 | ||
343 | static ssize_t | |
344 | thermal_cooling_device_max_state_show(struct device *dev, | |
345 | struct device_attribute *attr, char *buf) | |
346 | { | |
347 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
348 | unsigned long state; |
349 | int ret; | |
203d3d4a | 350 | |
6503e5df MG |
351 | ret = cdev->ops->get_max_state(cdev, &state); |
352 | if (ret) | |
353 | return ret; | |
354 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
355 | } |
356 | ||
357 | static ssize_t | |
358 | thermal_cooling_device_cur_state_show(struct device *dev, | |
359 | struct device_attribute *attr, char *buf) | |
360 | { | |
361 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
362 | unsigned long state; |
363 | int ret; | |
203d3d4a | 364 | |
6503e5df MG |
365 | ret = cdev->ops->get_cur_state(cdev, &state); |
366 | if (ret) | |
367 | return ret; | |
368 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
369 | } |
370 | ||
371 | static ssize_t | |
372 | thermal_cooling_device_cur_state_store(struct device *dev, | |
373 | struct device_attribute *attr, | |
374 | const char *buf, size_t count) | |
375 | { | |
376 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 377 | unsigned long state; |
203d3d4a ZR |
378 | int result; |
379 | ||
6503e5df | 380 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
381 | return -EINVAL; |
382 | ||
edb94918 | 383 | if ((long)state < 0) |
203d3d4a ZR |
384 | return -EINVAL; |
385 | ||
386 | result = cdev->ops->set_cur_state(cdev, state); | |
387 | if (result) | |
388 | return result; | |
389 | return count; | |
390 | } | |
391 | ||
392 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 393 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
394 | static DEVICE_ATTR(max_state, 0444, |
395 | thermal_cooling_device_max_state_show, NULL); | |
396 | static DEVICE_ATTR(cur_state, 0644, | |
397 | thermal_cooling_device_cur_state_show, | |
398 | thermal_cooling_device_cur_state_store); | |
399 | ||
400 | static ssize_t | |
401 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 402 | struct device_attribute *attr, char *buf) |
203d3d4a ZR |
403 | { |
404 | struct thermal_cooling_device_instance *instance; | |
405 | ||
406 | instance = | |
407 | container_of(attr, struct thermal_cooling_device_instance, attr); | |
408 | ||
409 | if (instance->trip == THERMAL_TRIPS_NONE) | |
410 | return sprintf(buf, "-1\n"); | |
411 | else | |
412 | return sprintf(buf, "%d\n", instance->trip); | |
413 | } | |
414 | ||
415 | /* Device management */ | |
416 | ||
16d75239 RH |
417 | #if defined(CONFIG_THERMAL_HWMON) |
418 | ||
e68b16ab ZR |
419 | /* hwmon sys I/F */ |
420 | #include <linux/hwmon.h> | |
31f5396a JD |
421 | |
422 | /* thermal zone devices with the same type share one hwmon device */ | |
423 | struct thermal_hwmon_device { | |
424 | char type[THERMAL_NAME_LENGTH]; | |
425 | struct device *device; | |
426 | int count; | |
427 | struct list_head tz_list; | |
428 | struct list_head node; | |
429 | }; | |
430 | ||
431 | struct thermal_hwmon_attr { | |
432 | struct device_attribute attr; | |
433 | char name[16]; | |
434 | }; | |
435 | ||
436 | /* one temperature input for each thermal zone */ | |
437 | struct thermal_hwmon_temp { | |
438 | struct list_head hwmon_node; | |
439 | struct thermal_zone_device *tz; | |
440 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
441 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
442 | }; | |
443 | ||
e68b16ab ZR |
444 | static LIST_HEAD(thermal_hwmon_list); |
445 | ||
446 | static ssize_t | |
447 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
448 | { | |
0e968a3b | 449 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
450 | return sprintf(buf, "%s\n", hwmon->type); |
451 | } | |
452 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
453 | ||
454 | static ssize_t | |
455 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
456 | { | |
6503e5df MG |
457 | long temperature; |
458 | int ret; | |
e68b16ab ZR |
459 | struct thermal_hwmon_attr *hwmon_attr |
460 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
461 | struct thermal_hwmon_temp *temp |
462 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 463 | temp_input); |
31f5396a | 464 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 465 | |
6503e5df MG |
466 | ret = tz->ops->get_temp(tz, &temperature); |
467 | ||
468 | if (ret) | |
469 | return ret; | |
470 | ||
471 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
472 | } |
473 | ||
474 | static ssize_t | |
475 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
476 | char *buf) | |
477 | { | |
478 | struct thermal_hwmon_attr *hwmon_attr | |
479 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
480 | struct thermal_hwmon_temp *temp |
481 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 482 | temp_crit); |
31f5396a | 483 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
484 | long temperature; |
485 | int ret; | |
486 | ||
487 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
488 | if (ret) | |
489 | return ret; | |
e68b16ab | 490 | |
6503e5df | 491 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
492 | } |
493 | ||
494 | ||
0d97d7a4 JD |
495 | static struct thermal_hwmon_device * |
496 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
497 | { |
498 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
499 | |
500 | mutex_lock(&thermal_list_lock); | |
501 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
502 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 503 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 504 | return hwmon; |
e68b16ab ZR |
505 | } |
506 | mutex_unlock(&thermal_list_lock); | |
507 | ||
0d97d7a4 JD |
508 | return NULL; |
509 | } | |
510 | ||
31f5396a JD |
511 | /* Find the temperature input matching a given thermal zone */ |
512 | static struct thermal_hwmon_temp * | |
513 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
514 | const struct thermal_zone_device *tz) | |
515 | { | |
516 | struct thermal_hwmon_temp *temp; | |
517 | ||
518 | mutex_lock(&thermal_list_lock); | |
519 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
520 | if (temp->tz == tz) { | |
521 | mutex_unlock(&thermal_list_lock); | |
522 | return temp; | |
523 | } | |
524 | mutex_unlock(&thermal_list_lock); | |
525 | ||
526 | return NULL; | |
527 | } | |
528 | ||
0d97d7a4 JD |
529 | static int |
530 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
531 | { | |
532 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 533 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
534 | int new_hwmon_device = 1; |
535 | int result; | |
536 | ||
537 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
538 | if (hwmon) { | |
539 | new_hwmon_device = 0; | |
540 | goto register_sys_interface; | |
541 | } | |
542 | ||
e68b16ab ZR |
543 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
544 | if (!hwmon) | |
545 | return -ENOMEM; | |
546 | ||
547 | INIT_LIST_HEAD(&hwmon->tz_list); | |
548 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
549 | hwmon->device = hwmon_device_register(NULL); | |
550 | if (IS_ERR(hwmon->device)) { | |
551 | result = PTR_ERR(hwmon->device); | |
552 | goto free_mem; | |
553 | } | |
0e968a3b | 554 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
555 | result = device_create_file(hwmon->device, &dev_attr_name); |
556 | if (result) | |
b299eb5c | 557 | goto free_mem; |
e68b16ab ZR |
558 | |
559 | register_sys_interface: | |
31f5396a JD |
560 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
561 | if (!temp) { | |
562 | result = -ENOMEM; | |
563 | goto unregister_name; | |
564 | } | |
565 | ||
566 | temp->tz = tz; | |
e68b16ab ZR |
567 | hwmon->count++; |
568 | ||
31f5396a | 569 | snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH, |
e68b16ab | 570 | "temp%d_input", hwmon->count); |
31f5396a JD |
571 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
572 | temp->temp_input.attr.attr.mode = 0444; | |
573 | temp->temp_input.attr.show = temp_input_show; | |
574 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
575 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 576 | if (result) |
31f5396a | 577 | goto free_temp_mem; |
e68b16ab ZR |
578 | |
579 | if (tz->ops->get_crit_temp) { | |
580 | unsigned long temperature; | |
581 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
31f5396a | 582 | snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH, |
e68b16ab | 583 | "temp%d_crit", hwmon->count); |
31f5396a JD |
584 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
585 | temp->temp_crit.attr.attr.mode = 0444; | |
586 | temp->temp_crit.attr.show = temp_crit_show; | |
587 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 588 | result = device_create_file(hwmon->device, |
31f5396a | 589 | &temp->temp_crit.attr); |
e68b16ab | 590 | if (result) |
b299eb5c | 591 | goto unregister_input; |
e68b16ab ZR |
592 | } |
593 | } | |
594 | ||
595 | mutex_lock(&thermal_list_lock); | |
596 | if (new_hwmon_device) | |
597 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 598 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
599 | mutex_unlock(&thermal_list_lock); |
600 | ||
601 | return 0; | |
602 | ||
b299eb5c | 603 | unregister_input: |
31f5396a JD |
604 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
605 | free_temp_mem: | |
606 | kfree(temp); | |
b299eb5c | 607 | unregister_name: |
e68b16ab ZR |
608 | if (new_hwmon_device) { |
609 | device_remove_file(hwmon->device, &dev_attr_name); | |
610 | hwmon_device_unregister(hwmon->device); | |
611 | } | |
612 | free_mem: | |
613 | if (new_hwmon_device) | |
614 | kfree(hwmon); | |
615 | ||
616 | return result; | |
617 | } | |
618 | ||
619 | static void | |
620 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
621 | { | |
31f5396a JD |
622 | struct thermal_hwmon_device *hwmon; |
623 | struct thermal_hwmon_temp *temp; | |
624 | ||
625 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
626 | if (unlikely(!hwmon)) { | |
627 | /* Should never happen... */ | |
628 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
629 | return; | |
630 | } | |
631 | ||
632 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
633 | if (unlikely(!temp)) { | |
634 | /* Should never happen... */ | |
635 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
636 | return; | |
637 | } | |
e68b16ab | 638 | |
31f5396a | 639 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 640 | if (tz->ops->get_crit_temp) |
31f5396a | 641 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
642 | |
643 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
644 | list_del(&temp->hwmon_node); |
645 | kfree(temp); | |
e68b16ab ZR |
646 | if (!list_empty(&hwmon->tz_list)) { |
647 | mutex_unlock(&thermal_list_lock); | |
648 | return; | |
649 | } | |
650 | list_del(&hwmon->node); | |
651 | mutex_unlock(&thermal_list_lock); | |
652 | ||
653 | device_remove_file(hwmon->device, &dev_attr_name); | |
654 | hwmon_device_unregister(hwmon->device); | |
655 | kfree(hwmon); | |
656 | } | |
657 | #else | |
658 | static int | |
659 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
660 | { | |
661 | return 0; | |
662 | } | |
663 | ||
664 | static void | |
665 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
666 | { | |
667 | } | |
668 | #endif | |
669 | ||
b1569e99 MG |
670 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
671 | int delay) | |
672 | { | |
673 | cancel_delayed_work(&(tz->poll_queue)); | |
674 | ||
675 | if (!delay) | |
676 | return; | |
677 | ||
678 | if (delay > 1000) | |
51e20d0e | 679 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
680 | round_jiffies(msecs_to_jiffies(delay))); |
681 | else | |
51e20d0e | 682 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
683 | msecs_to_jiffies(delay)); |
684 | } | |
685 | ||
686 | static void thermal_zone_device_passive(struct thermal_zone_device *tz, | |
687 | int temp, int trip_temp, int trip) | |
688 | { | |
689 | int trend = 0; | |
690 | struct thermal_cooling_device_instance *instance; | |
691 | struct thermal_cooling_device *cdev; | |
692 | long state, max_state; | |
693 | ||
694 | /* | |
695 | * Above Trip? | |
696 | * ----------- | |
697 | * Calculate the thermal trend (using the passive cooling equation) | |
698 | * and modify the performance limit for all passive cooling devices | |
699 | * accordingly. Note that we assume symmetry. | |
700 | */ | |
701 | if (temp >= trip_temp) { | |
702 | tz->passive = true; | |
703 | ||
704 | trend = (tz->tc1 * (temp - tz->last_temperature)) + | |
705 | (tz->tc2 * (temp - trip_temp)); | |
706 | ||
707 | /* Heating up? */ | |
708 | if (trend > 0) { | |
709 | list_for_each_entry(instance, &tz->cooling_devices, | |
710 | node) { | |
711 | if (instance->trip != trip) | |
712 | continue; | |
713 | cdev = instance->cdev; | |
714 | cdev->ops->get_cur_state(cdev, &state); | |
715 | cdev->ops->get_max_state(cdev, &max_state); | |
716 | if (state++ < max_state) | |
717 | cdev->ops->set_cur_state(cdev, state); | |
718 | } | |
719 | } else if (trend < 0) { /* Cooling off? */ | |
720 | list_for_each_entry(instance, &tz->cooling_devices, | |
721 | node) { | |
722 | if (instance->trip != trip) | |
723 | continue; | |
724 | cdev = instance->cdev; | |
725 | cdev->ops->get_cur_state(cdev, &state); | |
726 | cdev->ops->get_max_state(cdev, &max_state); | |
727 | if (state > 0) | |
728 | cdev->ops->set_cur_state(cdev, --state); | |
729 | } | |
730 | } | |
731 | return; | |
732 | } | |
733 | ||
734 | /* | |
735 | * Below Trip? | |
736 | * ----------- | |
737 | * Implement passive cooling hysteresis to slowly increase performance | |
738 | * and avoid thrashing around the passive trip point. Note that we | |
739 | * assume symmetry. | |
740 | */ | |
741 | list_for_each_entry(instance, &tz->cooling_devices, node) { | |
742 | if (instance->trip != trip) | |
743 | continue; | |
744 | cdev = instance->cdev; | |
745 | cdev->ops->get_cur_state(cdev, &state); | |
746 | cdev->ops->get_max_state(cdev, &max_state); | |
747 | if (state > 0) | |
748 | cdev->ops->set_cur_state(cdev, --state); | |
749 | if (state == 0) | |
750 | tz->passive = false; | |
751 | } | |
752 | } | |
753 | ||
754 | static void thermal_zone_device_check(struct work_struct *work) | |
755 | { | |
756 | struct thermal_zone_device *tz = container_of(work, struct | |
757 | thermal_zone_device, | |
758 | poll_queue.work); | |
759 | thermal_zone_device_update(tz); | |
760 | } | |
e68b16ab | 761 | |
203d3d4a ZR |
762 | /** |
763 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
764 | * @tz: thermal zone device |
765 | * @trip: indicates which trip point the cooling devices is | |
766 | * associated with in this thermal zone. | |
767 | * @cdev: thermal cooling device | |
543a9561 LB |
768 | * |
769 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
770 | */ |
771 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
772 | int trip, | |
773 | struct thermal_cooling_device *cdev) | |
774 | { | |
775 | struct thermal_cooling_device_instance *dev; | |
776 | struct thermal_cooling_device_instance *pos; | |
c7516709 TS |
777 | struct thermal_zone_device *pos1; |
778 | struct thermal_cooling_device *pos2; | |
203d3d4a ZR |
779 | int result; |
780 | ||
543a9561 | 781 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
782 | return -EINVAL; |
783 | ||
c7516709 TS |
784 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
785 | if (pos1 == tz) | |
786 | break; | |
787 | } | |
788 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
789 | if (pos2 == cdev) | |
790 | break; | |
791 | } | |
792 | ||
793 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
794 | return -EINVAL; |
795 | ||
796 | dev = | |
797 | kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); | |
798 | if (!dev) | |
799 | return -ENOMEM; | |
800 | dev->tz = tz; | |
801 | dev->cdev = cdev; | |
802 | dev->trip = trip; | |
803 | result = get_idr(&tz->idr, &tz->lock, &dev->id); | |
804 | if (result) | |
805 | goto free_mem; | |
806 | ||
807 | sprintf(dev->name, "cdev%d", dev->id); | |
808 | result = | |
809 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
810 | if (result) | |
811 | goto release_idr; | |
812 | ||
813 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 814 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
815 | dev->attr.attr.name = dev->attr_name; |
816 | dev->attr.attr.mode = 0444; | |
817 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
818 | result = device_create_file(&tz->device, &dev->attr); | |
819 | if (result) | |
820 | goto remove_symbol_link; | |
821 | ||
822 | mutex_lock(&tz->lock); | |
823 | list_for_each_entry(pos, &tz->cooling_devices, node) | |
824 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
825 | result = -EEXIST; | |
826 | break; | |
827 | } | |
828 | if (!result) | |
829 | list_add_tail(&dev->node, &tz->cooling_devices); | |
830 | mutex_unlock(&tz->lock); | |
831 | ||
832 | if (!result) | |
833 | return 0; | |
834 | ||
835 | device_remove_file(&tz->device, &dev->attr); | |
836 | remove_symbol_link: | |
837 | sysfs_remove_link(&tz->device.kobj, dev->name); | |
838 | release_idr: | |
839 | release_idr(&tz->idr, &tz->lock, dev->id); | |
840 | free_mem: | |
841 | kfree(dev); | |
842 | return result; | |
843 | } | |
543a9561 | 844 | |
203d3d4a ZR |
845 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); |
846 | ||
847 | /** | |
848 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
849 | * @tz: thermal zone device |
850 | * @trip: indicates which trip point the cooling devices is | |
851 | * associated with in this thermal zone. | |
852 | * @cdev: thermal cooling device | |
543a9561 LB |
853 | * |
854 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
855 | */ |
856 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
857 | int trip, | |
858 | struct thermal_cooling_device *cdev) | |
859 | { | |
860 | struct thermal_cooling_device_instance *pos, *next; | |
861 | ||
862 | mutex_lock(&tz->lock); | |
863 | list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) { | |
543a9561 | 864 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
203d3d4a ZR |
865 | list_del(&pos->node); |
866 | mutex_unlock(&tz->lock); | |
867 | goto unbind; | |
868 | } | |
869 | } | |
870 | mutex_unlock(&tz->lock); | |
871 | ||
872 | return -ENODEV; | |
873 | ||
874 | unbind: | |
875 | device_remove_file(&tz->device, &pos->attr); | |
876 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
877 | release_idr(&tz->idr, &tz->lock, pos->id); | |
878 | kfree(pos); | |
879 | return 0; | |
880 | } | |
543a9561 | 881 | |
203d3d4a ZR |
882 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); |
883 | ||
884 | static void thermal_release(struct device *dev) | |
885 | { | |
886 | struct thermal_zone_device *tz; | |
887 | struct thermal_cooling_device *cdev; | |
888 | ||
354655ea | 889 | if (!strncmp(dev_name(dev), "thermal_zone", sizeof "thermal_zone" - 1)) { |
203d3d4a ZR |
890 | tz = to_thermal_zone(dev); |
891 | kfree(tz); | |
892 | } else { | |
893 | cdev = to_cooling_device(dev); | |
894 | kfree(cdev); | |
895 | } | |
896 | } | |
897 | ||
898 | static struct class thermal_class = { | |
899 | .name = "thermal", | |
900 | .dev_release = thermal_release, | |
901 | }; | |
902 | ||
903 | /** | |
904 | * thermal_cooling_device_register - register a new thermal cooling device | |
905 | * @type: the thermal cooling device type. | |
906 | * @devdata: device private data. | |
907 | * @ops: standard thermal cooling devices callbacks. | |
908 | */ | |
5b275ce2 AC |
909 | struct thermal_cooling_device *thermal_cooling_device_register( |
910 | char *type, void *devdata, const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
911 | { |
912 | struct thermal_cooling_device *cdev; | |
913 | struct thermal_zone_device *pos; | |
914 | int result; | |
915 | ||
916 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 917 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
918 | |
919 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 920 | !ops->set_cur_state) |
3e6fda5c | 921 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
922 | |
923 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
924 | if (!cdev) | |
3e6fda5c | 925 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
926 | |
927 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
928 | if (result) { | |
929 | kfree(cdev); | |
3e6fda5c | 930 | return ERR_PTR(result); |
203d3d4a ZR |
931 | } |
932 | ||
933 | strcpy(cdev->type, type); | |
934 | cdev->ops = ops; | |
935 | cdev->device.class = &thermal_class; | |
936 | cdev->devdata = devdata; | |
354655ea | 937 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
938 | result = device_register(&cdev->device); |
939 | if (result) { | |
940 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
941 | kfree(cdev); | |
3e6fda5c | 942 | return ERR_PTR(result); |
203d3d4a ZR |
943 | } |
944 | ||
945 | /* sys I/F */ | |
946 | if (type) { | |
543a9561 | 947 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
948 | if (result) |
949 | goto unregister; | |
950 | } | |
951 | ||
952 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
953 | if (result) | |
954 | goto unregister; | |
955 | ||
956 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
957 | if (result) | |
958 | goto unregister; | |
959 | ||
960 | mutex_lock(&thermal_list_lock); | |
961 | list_add(&cdev->node, &thermal_cdev_list); | |
962 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
963 | if (!pos->ops->bind) | |
964 | continue; | |
965 | result = pos->ops->bind(pos, cdev); | |
966 | if (result) | |
967 | break; | |
968 | ||
969 | } | |
970 | mutex_unlock(&thermal_list_lock); | |
971 | ||
972 | if (!result) | |
973 | return cdev; | |
974 | ||
975 | unregister: | |
976 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
977 | device_unregister(&cdev->device); | |
3e6fda5c | 978 | return ERR_PTR(result); |
203d3d4a | 979 | } |
543a9561 | 980 | |
203d3d4a ZR |
981 | EXPORT_SYMBOL(thermal_cooling_device_register); |
982 | ||
983 | /** | |
984 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
985 | * @cdev: the thermal cooling device to remove. |
986 | * | |
987 | * thermal_cooling_device_unregister() must be called when the device is no | |
988 | * longer needed. | |
989 | */ | |
990 | void thermal_cooling_device_unregister(struct | |
991 | thermal_cooling_device | |
992 | *cdev) | |
993 | { | |
994 | struct thermal_zone_device *tz; | |
995 | struct thermal_cooling_device *pos = NULL; | |
996 | ||
997 | if (!cdev) | |
998 | return; | |
999 | ||
1000 | mutex_lock(&thermal_list_lock); | |
1001 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1002 | if (pos == cdev) | |
1003 | break; | |
1004 | if (pos != cdev) { | |
1005 | /* thermal cooling device not found */ | |
1006 | mutex_unlock(&thermal_list_lock); | |
1007 | return; | |
1008 | } | |
1009 | list_del(&cdev->node); | |
1010 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1011 | if (!tz->ops->unbind) | |
1012 | continue; | |
1013 | tz->ops->unbind(tz, cdev); | |
1014 | } | |
1015 | mutex_unlock(&thermal_list_lock); | |
1016 | if (cdev->type[0]) | |
543a9561 | 1017 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1018 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1019 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1020 | ||
1021 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1022 | device_unregister(&cdev->device); | |
1023 | return; | |
1024 | } | |
543a9561 | 1025 | |
203d3d4a ZR |
1026 | EXPORT_SYMBOL(thermal_cooling_device_unregister); |
1027 | ||
b1569e99 MG |
1028 | /** |
1029 | * thermal_zone_device_update - force an update of a thermal zone's state | |
1030 | * @ttz: the thermal zone to update | |
1031 | */ | |
1032 | ||
1033 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
1034 | { | |
1035 | int count, ret = 0; | |
1036 | long temp, trip_temp; | |
1037 | enum thermal_trip_type trip_type; | |
1038 | struct thermal_cooling_device_instance *instance; | |
1039 | struct thermal_cooling_device *cdev; | |
1040 | ||
1041 | mutex_lock(&tz->lock); | |
1042 | ||
0d288162 MB |
1043 | if (tz->ops->get_temp(tz, &temp)) { |
1044 | /* get_temp failed - retry it later */ | |
1045 | printk(KERN_WARNING PREFIX "failed to read out thermal zone " | |
1046 | "%d\n", tz->id); | |
1047 | goto leave; | |
1048 | } | |
b1569e99 MG |
1049 | |
1050 | for (count = 0; count < tz->trips; count++) { | |
1051 | tz->ops->get_trip_type(tz, count, &trip_type); | |
1052 | tz->ops->get_trip_temp(tz, count, &trip_temp); | |
1053 | ||
1054 | switch (trip_type) { | |
1055 | case THERMAL_TRIP_CRITICAL: | |
29321357 | 1056 | if (temp >= trip_temp) { |
b1569e99 MG |
1057 | if (tz->ops->notify) |
1058 | ret = tz->ops->notify(tz, count, | |
1059 | trip_type); | |
1060 | if (!ret) { | |
1061 | printk(KERN_EMERG | |
1062 | "Critical temperature reached (%ld C), shutting down.\n", | |
1063 | temp/1000); | |
1064 | orderly_poweroff(true); | |
1065 | } | |
1066 | } | |
1067 | break; | |
1068 | case THERMAL_TRIP_HOT: | |
29321357 | 1069 | if (temp >= trip_temp) |
b1569e99 MG |
1070 | if (tz->ops->notify) |
1071 | tz->ops->notify(tz, count, trip_type); | |
1072 | break; | |
1073 | case THERMAL_TRIP_ACTIVE: | |
1074 | list_for_each_entry(instance, &tz->cooling_devices, | |
1075 | node) { | |
1076 | if (instance->trip != count) | |
1077 | continue; | |
1078 | ||
1079 | cdev = instance->cdev; | |
1080 | ||
29321357 | 1081 | if (temp >= trip_temp) |
b1569e99 MG |
1082 | cdev->ops->set_cur_state(cdev, 1); |
1083 | else | |
1084 | cdev->ops->set_cur_state(cdev, 0); | |
1085 | } | |
1086 | break; | |
1087 | case THERMAL_TRIP_PASSIVE: | |
29321357 | 1088 | if (temp >= trip_temp || tz->passive) |
b1569e99 MG |
1089 | thermal_zone_device_passive(tz, temp, |
1090 | trip_temp, count); | |
1091 | break; | |
1092 | } | |
1093 | } | |
03a971a2 MG |
1094 | |
1095 | if (tz->forced_passive) | |
1096 | thermal_zone_device_passive(tz, temp, tz->forced_passive, | |
1097 | THERMAL_TRIPS_NONE); | |
1098 | ||
b1569e99 | 1099 | tz->last_temperature = temp; |
0d288162 MB |
1100 | |
1101 | leave: | |
b1569e99 MG |
1102 | if (tz->passive) |
1103 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
1104 | else if (tz->polling_delay) | |
1105 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
3767cb54 FP |
1106 | else |
1107 | thermal_zone_device_set_polling(tz, 0); | |
b1569e99 MG |
1108 | mutex_unlock(&tz->lock); |
1109 | } | |
1110 | EXPORT_SYMBOL(thermal_zone_device_update); | |
1111 | ||
203d3d4a ZR |
1112 | /** |
1113 | * thermal_zone_device_register - register a new thermal zone device | |
1114 | * @type: the thermal zone device type | |
1115 | * @trips: the number of trip points the thermal zone support | |
1116 | * @devdata: private device data | |
1117 | * @ops: standard thermal zone device callbacks | |
b1569e99 MG |
1118 | * @tc1: thermal coefficient 1 for passive calculations |
1119 | * @tc2: thermal coefficient 2 for passive calculations | |
1120 | * @passive_delay: number of milliseconds to wait between polls when | |
1121 | * performing passive cooling | |
1122 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1123 | * whether trip points have been crossed (0 for interrupt | |
1124 | * driven systems) | |
203d3d4a ZR |
1125 | * |
1126 | * thermal_zone_device_unregister() must be called when the device is no | |
b1569e99 MG |
1127 | * longer needed. The passive cooling formula uses tc1 and tc2 as described in |
1128 | * section 11.1.5.1 of the ACPI specification 3.0. | |
203d3d4a ZR |
1129 | */ |
1130 | struct thermal_zone_device *thermal_zone_device_register(char *type, | |
5b275ce2 AC |
1131 | int trips, void *devdata, |
1132 | const struct thermal_zone_device_ops *ops, | |
1133 | int tc1, int tc2, int passive_delay, int polling_delay) | |
203d3d4a ZR |
1134 | { |
1135 | struct thermal_zone_device *tz; | |
1136 | struct thermal_cooling_device *pos; | |
03a971a2 | 1137 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1138 | int result; |
1139 | int count; | |
03a971a2 | 1140 | int passive = 0; |
203d3d4a ZR |
1141 | |
1142 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 1143 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1144 | |
1145 | if (trips > THERMAL_MAX_TRIPS || trips < 0) | |
3e6fda5c | 1146 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1147 | |
1148 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1149 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1150 | |
1151 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); | |
1152 | if (!tz) | |
3e6fda5c | 1153 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1154 | |
1155 | INIT_LIST_HEAD(&tz->cooling_devices); | |
1156 | idr_init(&tz->idr); | |
1157 | mutex_init(&tz->lock); | |
1158 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1159 | if (result) { | |
1160 | kfree(tz); | |
3e6fda5c | 1161 | return ERR_PTR(result); |
203d3d4a ZR |
1162 | } |
1163 | ||
1164 | strcpy(tz->type, type); | |
1165 | tz->ops = ops; | |
1166 | tz->device.class = &thermal_class; | |
1167 | tz->devdata = devdata; | |
1168 | tz->trips = trips; | |
b1569e99 MG |
1169 | tz->tc1 = tc1; |
1170 | tz->tc2 = tc2; | |
1171 | tz->passive_delay = passive_delay; | |
1172 | tz->polling_delay = polling_delay; | |
1173 | ||
354655ea | 1174 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1175 | result = device_register(&tz->device); |
1176 | if (result) { | |
1177 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1178 | kfree(tz); | |
3e6fda5c | 1179 | return ERR_PTR(result); |
203d3d4a ZR |
1180 | } |
1181 | ||
1182 | /* sys I/F */ | |
1183 | if (type) { | |
1184 | result = device_create_file(&tz->device, &dev_attr_type); | |
1185 | if (result) | |
1186 | goto unregister; | |
1187 | } | |
1188 | ||
1189 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1190 | if (result) | |
1191 | goto unregister; | |
1192 | ||
1193 | if (ops->get_mode) { | |
1194 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1195 | if (result) | |
1196 | goto unregister; | |
1197 | } | |
1198 | ||
1199 | for (count = 0; count < trips; count++) { | |
1200 | TRIP_POINT_ATTR_ADD(&tz->device, count, result); | |
1201 | if (result) | |
1202 | goto unregister; | |
03a971a2 MG |
1203 | tz->ops->get_trip_type(tz, count, &trip_type); |
1204 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1205 | passive = 1; | |
203d3d4a ZR |
1206 | } |
1207 | ||
03a971a2 MG |
1208 | if (!passive) |
1209 | result = device_create_file(&tz->device, | |
1210 | &dev_attr_passive); | |
1211 | ||
1212 | if (result) | |
1213 | goto unregister; | |
1214 | ||
e68b16ab ZR |
1215 | result = thermal_add_hwmon_sysfs(tz); |
1216 | if (result) | |
1217 | goto unregister; | |
1218 | ||
203d3d4a ZR |
1219 | mutex_lock(&thermal_list_lock); |
1220 | list_add_tail(&tz->node, &thermal_tz_list); | |
1221 | if (ops->bind) | |
1222 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
543a9561 LB |
1223 | result = ops->bind(tz, pos); |
1224 | if (result) | |
1225 | break; | |
203d3d4a ZR |
1226 | } |
1227 | mutex_unlock(&thermal_list_lock); | |
1228 | ||
b1569e99 MG |
1229 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1230 | ||
1231 | thermal_zone_device_update(tz); | |
1232 | ||
203d3d4a ZR |
1233 | if (!result) |
1234 | return tz; | |
1235 | ||
1236 | unregister: | |
1237 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1238 | device_unregister(&tz->device); | |
3e6fda5c | 1239 | return ERR_PTR(result); |
203d3d4a | 1240 | } |
543a9561 | 1241 | |
203d3d4a ZR |
1242 | EXPORT_SYMBOL(thermal_zone_device_register); |
1243 | ||
1244 | /** | |
1245 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1246 | * @tz: the thermal zone device to remove |
1247 | */ | |
1248 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1249 | { | |
1250 | struct thermal_cooling_device *cdev; | |
1251 | struct thermal_zone_device *pos = NULL; | |
1252 | int count; | |
1253 | ||
1254 | if (!tz) | |
1255 | return; | |
1256 | ||
1257 | mutex_lock(&thermal_list_lock); | |
1258 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1259 | if (pos == tz) | |
1260 | break; | |
1261 | if (pos != tz) { | |
1262 | /* thermal zone device not found */ | |
1263 | mutex_unlock(&thermal_list_lock); | |
1264 | return; | |
1265 | } | |
1266 | list_del(&tz->node); | |
1267 | if (tz->ops->unbind) | |
1268 | list_for_each_entry(cdev, &thermal_cdev_list, node) | |
1269 | tz->ops->unbind(tz, cdev); | |
1270 | mutex_unlock(&thermal_list_lock); | |
1271 | ||
b1569e99 MG |
1272 | thermal_zone_device_set_polling(tz, 0); |
1273 | ||
203d3d4a ZR |
1274 | if (tz->type[0]) |
1275 | device_remove_file(&tz->device, &dev_attr_type); | |
1276 | device_remove_file(&tz->device, &dev_attr_temp); | |
1277 | if (tz->ops->get_mode) | |
1278 | device_remove_file(&tz->device, &dev_attr_mode); | |
1279 | ||
1280 | for (count = 0; count < tz->trips; count++) | |
1281 | TRIP_POINT_ATTR_REMOVE(&tz->device, count); | |
1282 | ||
e68b16ab | 1283 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1284 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1285 | idr_destroy(&tz->idr); | |
1286 | mutex_destroy(&tz->lock); | |
1287 | device_unregister(&tz->device); | |
1288 | return; | |
1289 | } | |
543a9561 | 1290 | |
203d3d4a ZR |
1291 | EXPORT_SYMBOL(thermal_zone_device_unregister); |
1292 | ||
af06216a RW |
1293 | #ifdef CONFIG_NET |
1294 | static struct genl_family thermal_event_genl_family = { | |
1295 | .id = GENL_ID_GENERATE, | |
1296 | .name = THERMAL_GENL_FAMILY_NAME, | |
1297 | .version = THERMAL_GENL_VERSION, | |
1298 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1299 | }; | |
1300 | ||
1301 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1302 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1303 | }; | |
1304 | ||
2d58d7ea | 1305 | int thermal_generate_netlink_event(u32 orig, enum events event) |
4cb18728 D |
1306 | { |
1307 | struct sk_buff *skb; | |
1308 | struct nlattr *attr; | |
1309 | struct thermal_genl_event *thermal_event; | |
1310 | void *msg_header; | |
1311 | int size; | |
1312 | int result; | |
b11de07c | 1313 | static unsigned int thermal_event_seqnum; |
4cb18728 D |
1314 | |
1315 | /* allocate memory */ | |
1316 | size = nla_total_size(sizeof(struct thermal_genl_event)) + \ | |
1317 | nla_total_size(0); | |
1318 | ||
1319 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1320 | if (!skb) | |
1321 | return -ENOMEM; | |
1322 | ||
1323 | /* add the genetlink message header */ | |
1324 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1325 | &thermal_event_genl_family, 0, | |
1326 | THERMAL_GENL_CMD_EVENT); | |
1327 | if (!msg_header) { | |
1328 | nlmsg_free(skb); | |
1329 | return -ENOMEM; | |
1330 | } | |
1331 | ||
1332 | /* fill the data */ | |
1333 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, \ | |
1334 | sizeof(struct thermal_genl_event)); | |
1335 | ||
1336 | if (!attr) { | |
1337 | nlmsg_free(skb); | |
1338 | return -EINVAL; | |
1339 | } | |
1340 | ||
1341 | thermal_event = nla_data(attr); | |
1342 | if (!thermal_event) { | |
1343 | nlmsg_free(skb); | |
1344 | return -EINVAL; | |
1345 | } | |
1346 | ||
1347 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1348 | ||
1349 | thermal_event->orig = orig; | |
1350 | thermal_event->event = event; | |
1351 | ||
1352 | /* send multicast genetlink message */ | |
1353 | result = genlmsg_end(skb, msg_header); | |
1354 | if (result < 0) { | |
1355 | nlmsg_free(skb); | |
1356 | return result; | |
1357 | } | |
1358 | ||
1359 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1360 | if (result) | |
1361 | printk(KERN_INFO "failed to send netlink event:%d", result); | |
1362 | ||
1363 | return result; | |
1364 | } | |
2d58d7ea | 1365 | EXPORT_SYMBOL(thermal_generate_netlink_event); |
4cb18728 D |
1366 | |
1367 | static int genetlink_init(void) | |
1368 | { | |
1369 | int result; | |
1370 | ||
1371 | result = genl_register_family(&thermal_event_genl_family); | |
1372 | if (result) | |
1373 | return result; | |
1374 | ||
1375 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1376 | &thermal_event_mcgrp); | |
1377 | if (result) | |
1378 | genl_unregister_family(&thermal_event_genl_family); | |
1379 | return result; | |
1380 | } | |
1381 | ||
af06216a RW |
1382 | static void genetlink_exit(void) |
1383 | { | |
1384 | genl_unregister_family(&thermal_event_genl_family); | |
1385 | } | |
1386 | #else /* !CONFIG_NET */ | |
1387 | static inline int genetlink_init(void) { return 0; } | |
1388 | static inline void genetlink_exit(void) {} | |
1389 | #endif /* !CONFIG_NET */ | |
1390 | ||
203d3d4a ZR |
1391 | static int __init thermal_init(void) |
1392 | { | |
1393 | int result = 0; | |
1394 | ||
1395 | result = class_register(&thermal_class); | |
1396 | if (result) { | |
1397 | idr_destroy(&thermal_tz_idr); | |
1398 | idr_destroy(&thermal_cdev_idr); | |
1399 | mutex_destroy(&thermal_idr_lock); | |
1400 | mutex_destroy(&thermal_list_lock); | |
1401 | } | |
4cb18728 | 1402 | result = genetlink_init(); |
203d3d4a ZR |
1403 | return result; |
1404 | } | |
1405 | ||
1406 | static void __exit thermal_exit(void) | |
1407 | { | |
1408 | class_unregister(&thermal_class); | |
1409 | idr_destroy(&thermal_tz_idr); | |
1410 | idr_destroy(&thermal_cdev_idr); | |
1411 | mutex_destroy(&thermal_idr_lock); | |
1412 | mutex_destroy(&thermal_list_lock); | |
4cb18728 | 1413 | genetlink_exit(); |
203d3d4a ZR |
1414 | } |
1415 | ||
4cb18728 | 1416 | fs_initcall(thermal_init); |
203d3d4a | 1417 | module_exit(thermal_exit); |