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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 | ||
4cb18728 D |
63 | static unsigned int thermal_event_seqnum; |
64 | ||
203d3d4a ZR |
65 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) |
66 | { | |
67 | int err; | |
68 | ||
69 | again: | |
70 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) | |
71 | return -ENOMEM; | |
72 | ||
73 | if (lock) | |
74 | mutex_lock(lock); | |
75 | err = idr_get_new(idr, NULL, id); | |
76 | if (lock) | |
77 | mutex_unlock(lock); | |
78 | if (unlikely(err == -EAGAIN)) | |
79 | goto again; | |
80 | else if (unlikely(err)) | |
81 | return err; | |
82 | ||
83 | *id = *id & MAX_ID_MASK; | |
84 | return 0; | |
85 | } | |
86 | ||
87 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
88 | { | |
89 | if (lock) | |
90 | mutex_lock(lock); | |
91 | idr_remove(idr, id); | |
92 | if (lock) | |
93 | mutex_unlock(lock); | |
94 | } | |
95 | ||
96 | /* sys I/F for thermal zone */ | |
97 | ||
98 | #define to_thermal_zone(_dev) \ | |
99 | container_of(_dev, struct thermal_zone_device, device) | |
100 | ||
101 | static ssize_t | |
102 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
103 | { | |
104 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
105 | ||
106 | return sprintf(buf, "%s\n", tz->type); | |
107 | } | |
108 | ||
109 | static ssize_t | |
110 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
111 | { | |
112 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
113 | long temperature; |
114 | int ret; | |
203d3d4a ZR |
115 | |
116 | if (!tz->ops->get_temp) | |
117 | return -EPERM; | |
118 | ||
6503e5df MG |
119 | ret = tz->ops->get_temp(tz, &temperature); |
120 | ||
121 | if (ret) | |
122 | return ret; | |
123 | ||
124 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
125 | } |
126 | ||
127 | static ssize_t | |
128 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
129 | { | |
130 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
131 | enum thermal_device_mode mode; |
132 | int result; | |
203d3d4a ZR |
133 | |
134 | if (!tz->ops->get_mode) | |
135 | return -EPERM; | |
136 | ||
6503e5df MG |
137 | result = tz->ops->get_mode(tz, &mode); |
138 | if (result) | |
139 | return result; | |
140 | ||
141 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
142 | : "disabled"); | |
203d3d4a ZR |
143 | } |
144 | ||
145 | static ssize_t | |
146 | mode_store(struct device *dev, struct device_attribute *attr, | |
147 | const char *buf, size_t count) | |
148 | { | |
149 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
150 | int result; | |
151 | ||
152 | if (!tz->ops->set_mode) | |
153 | return -EPERM; | |
154 | ||
6503e5df MG |
155 | if (!strncmp(buf, "enabled", sizeof("enabled"))) |
156 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); | |
157 | else if (!strncmp(buf, "disabled", sizeof("disabled"))) | |
158 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); | |
159 | else | |
160 | result = -EINVAL; | |
161 | ||
203d3d4a ZR |
162 | if (result) |
163 | return result; | |
164 | ||
165 | return count; | |
166 | } | |
167 | ||
168 | static ssize_t | |
169 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
170 | char *buf) | |
171 | { | |
172 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
173 | enum thermal_trip_type type; |
174 | int trip, result; | |
203d3d4a ZR |
175 | |
176 | if (!tz->ops->get_trip_type) | |
177 | return -EPERM; | |
178 | ||
179 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
180 | return -EINVAL; | |
181 | ||
6503e5df MG |
182 | result = tz->ops->get_trip_type(tz, trip, &type); |
183 | if (result) | |
184 | return result; | |
185 | ||
186 | switch (type) { | |
187 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 188 | return sprintf(buf, "critical\n"); |
6503e5df | 189 | case THERMAL_TRIP_HOT: |
625120a4 | 190 | return sprintf(buf, "hot\n"); |
6503e5df | 191 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 192 | return sprintf(buf, "passive\n"); |
6503e5df | 193 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 194 | return sprintf(buf, "active\n"); |
6503e5df | 195 | default: |
625120a4 | 196 | return sprintf(buf, "unknown\n"); |
6503e5df | 197 | } |
203d3d4a ZR |
198 | } |
199 | ||
200 | static ssize_t | |
201 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
202 | char *buf) | |
203 | { | |
204 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
205 | int trip, ret; |
206 | long temperature; | |
203d3d4a ZR |
207 | |
208 | if (!tz->ops->get_trip_temp) | |
209 | return -EPERM; | |
210 | ||
211 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
212 | return -EINVAL; | |
213 | ||
6503e5df MG |
214 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
215 | ||
216 | if (ret) | |
217 | return ret; | |
218 | ||
219 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
220 | } |
221 | ||
03a971a2 MG |
222 | static ssize_t |
223 | passive_store(struct device *dev, struct device_attribute *attr, | |
224 | const char *buf, size_t count) | |
225 | { | |
226 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
227 | struct thermal_cooling_device *cdev = NULL; | |
228 | int state; | |
229 | ||
230 | if (!sscanf(buf, "%d\n", &state)) | |
231 | return -EINVAL; | |
232 | ||
3d8e3ad8 FP |
233 | /* sanity check: values below 1000 millicelcius don't make sense |
234 | * and can cause the system to go into a thermal heart attack | |
235 | */ | |
236 | if (state && state < 1000) | |
237 | return -EINVAL; | |
238 | ||
03a971a2 MG |
239 | if (state && !tz->forced_passive) { |
240 | mutex_lock(&thermal_list_lock); | |
241 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
242 | if (!strncmp("Processor", cdev->type, | |
243 | sizeof("Processor"))) | |
244 | thermal_zone_bind_cooling_device(tz, | |
245 | THERMAL_TRIPS_NONE, | |
246 | cdev); | |
247 | } | |
248 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
249 | if (!tz->passive_delay) |
250 | tz->passive_delay = 1000; | |
03a971a2 MG |
251 | } else if (!state && tz->forced_passive) { |
252 | mutex_lock(&thermal_list_lock); | |
253 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
254 | if (!strncmp("Processor", cdev->type, | |
255 | sizeof("Processor"))) | |
256 | thermal_zone_unbind_cooling_device(tz, | |
257 | THERMAL_TRIPS_NONE, | |
258 | cdev); | |
259 | } | |
260 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 261 | tz->passive_delay = 0; |
03a971a2 MG |
262 | } |
263 | ||
264 | tz->tc1 = 1; | |
265 | tz->tc2 = 1; | |
266 | ||
03a971a2 MG |
267 | tz->forced_passive = state; |
268 | ||
269 | thermal_zone_device_update(tz); | |
270 | ||
271 | return count; | |
272 | } | |
273 | ||
274 | static ssize_t | |
275 | passive_show(struct device *dev, struct device_attribute *attr, | |
276 | char *buf) | |
277 | { | |
278 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
279 | ||
280 | return sprintf(buf, "%d\n", tz->forced_passive); | |
281 | } | |
282 | ||
203d3d4a ZR |
283 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
284 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
285 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
03a971a2 MG |
286 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, \ |
287 | passive_store); | |
203d3d4a ZR |
288 | |
289 | static struct device_attribute trip_point_attrs[] = { | |
290 | __ATTR(trip_point_0_type, 0444, trip_point_type_show, NULL), | |
291 | __ATTR(trip_point_0_temp, 0444, trip_point_temp_show, NULL), | |
292 | __ATTR(trip_point_1_type, 0444, trip_point_type_show, NULL), | |
293 | __ATTR(trip_point_1_temp, 0444, trip_point_temp_show, NULL), | |
294 | __ATTR(trip_point_2_type, 0444, trip_point_type_show, NULL), | |
295 | __ATTR(trip_point_2_temp, 0444, trip_point_temp_show, NULL), | |
296 | __ATTR(trip_point_3_type, 0444, trip_point_type_show, NULL), | |
297 | __ATTR(trip_point_3_temp, 0444, trip_point_temp_show, NULL), | |
298 | __ATTR(trip_point_4_type, 0444, trip_point_type_show, NULL), | |
299 | __ATTR(trip_point_4_temp, 0444, trip_point_temp_show, NULL), | |
300 | __ATTR(trip_point_5_type, 0444, trip_point_type_show, NULL), | |
301 | __ATTR(trip_point_5_temp, 0444, trip_point_temp_show, NULL), | |
302 | __ATTR(trip_point_6_type, 0444, trip_point_type_show, NULL), | |
303 | __ATTR(trip_point_6_temp, 0444, trip_point_temp_show, NULL), | |
304 | __ATTR(trip_point_7_type, 0444, trip_point_type_show, NULL), | |
305 | __ATTR(trip_point_7_temp, 0444, trip_point_temp_show, NULL), | |
306 | __ATTR(trip_point_8_type, 0444, trip_point_type_show, NULL), | |
307 | __ATTR(trip_point_8_temp, 0444, trip_point_temp_show, NULL), | |
308 | __ATTR(trip_point_9_type, 0444, trip_point_type_show, NULL), | |
309 | __ATTR(trip_point_9_temp, 0444, trip_point_temp_show, NULL), | |
5f1a3f2a KH |
310 | __ATTR(trip_point_10_type, 0444, trip_point_type_show, NULL), |
311 | __ATTR(trip_point_10_temp, 0444, trip_point_temp_show, NULL), | |
312 | __ATTR(trip_point_11_type, 0444, trip_point_type_show, NULL), | |
313 | __ATTR(trip_point_11_temp, 0444, trip_point_temp_show, NULL), | |
203d3d4a ZR |
314 | }; |
315 | ||
316 | #define TRIP_POINT_ATTR_ADD(_dev, _index, result) \ | |
317 | do { \ | |
318 | result = device_create_file(_dev, \ | |
319 | &trip_point_attrs[_index * 2]); \ | |
320 | if (result) \ | |
321 | break; \ | |
322 | result = device_create_file(_dev, \ | |
323 | &trip_point_attrs[_index * 2 + 1]); \ | |
324 | } while (0) | |
325 | ||
326 | #define TRIP_POINT_ATTR_REMOVE(_dev, _index) \ | |
327 | do { \ | |
328 | device_remove_file(_dev, &trip_point_attrs[_index * 2]); \ | |
329 | device_remove_file(_dev, &trip_point_attrs[_index * 2 + 1]); \ | |
330 | } while (0) | |
331 | ||
332 | /* sys I/F for cooling device */ | |
333 | #define to_cooling_device(_dev) \ | |
334 | container_of(_dev, struct thermal_cooling_device, device) | |
335 | ||
336 | static ssize_t | |
337 | thermal_cooling_device_type_show(struct device *dev, | |
338 | struct device_attribute *attr, char *buf) | |
339 | { | |
340 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
341 | ||
342 | return sprintf(buf, "%s\n", cdev->type); | |
343 | } | |
344 | ||
345 | static ssize_t | |
346 | thermal_cooling_device_max_state_show(struct device *dev, | |
347 | struct device_attribute *attr, char *buf) | |
348 | { | |
349 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
350 | unsigned long state; |
351 | int ret; | |
203d3d4a | 352 | |
6503e5df MG |
353 | ret = cdev->ops->get_max_state(cdev, &state); |
354 | if (ret) | |
355 | return ret; | |
356 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
357 | } |
358 | ||
359 | static ssize_t | |
360 | thermal_cooling_device_cur_state_show(struct device *dev, | |
361 | struct device_attribute *attr, char *buf) | |
362 | { | |
363 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
364 | unsigned long state; |
365 | int ret; | |
203d3d4a | 366 | |
6503e5df MG |
367 | ret = cdev->ops->get_cur_state(cdev, &state); |
368 | if (ret) | |
369 | return ret; | |
370 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
371 | } |
372 | ||
373 | static ssize_t | |
374 | thermal_cooling_device_cur_state_store(struct device *dev, | |
375 | struct device_attribute *attr, | |
376 | const char *buf, size_t count) | |
377 | { | |
378 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 379 | unsigned long state; |
203d3d4a ZR |
380 | int result; |
381 | ||
6503e5df | 382 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
383 | return -EINVAL; |
384 | ||
edb94918 | 385 | if ((long)state < 0) |
203d3d4a ZR |
386 | return -EINVAL; |
387 | ||
388 | result = cdev->ops->set_cur_state(cdev, state); | |
389 | if (result) | |
390 | return result; | |
391 | return count; | |
392 | } | |
393 | ||
394 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 395 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
396 | static DEVICE_ATTR(max_state, 0444, |
397 | thermal_cooling_device_max_state_show, NULL); | |
398 | static DEVICE_ATTR(cur_state, 0644, | |
399 | thermal_cooling_device_cur_state_show, | |
400 | thermal_cooling_device_cur_state_store); | |
401 | ||
402 | static ssize_t | |
403 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 404 | struct device_attribute *attr, char *buf) |
203d3d4a ZR |
405 | { |
406 | struct thermal_cooling_device_instance *instance; | |
407 | ||
408 | instance = | |
409 | container_of(attr, struct thermal_cooling_device_instance, attr); | |
410 | ||
411 | if (instance->trip == THERMAL_TRIPS_NONE) | |
412 | return sprintf(buf, "-1\n"); | |
413 | else | |
414 | return sprintf(buf, "%d\n", instance->trip); | |
415 | } | |
416 | ||
417 | /* Device management */ | |
418 | ||
16d75239 RH |
419 | #if defined(CONFIG_THERMAL_HWMON) |
420 | ||
e68b16ab ZR |
421 | /* hwmon sys I/F */ |
422 | #include <linux/hwmon.h> | |
31f5396a JD |
423 | |
424 | /* thermal zone devices with the same type share one hwmon device */ | |
425 | struct thermal_hwmon_device { | |
426 | char type[THERMAL_NAME_LENGTH]; | |
427 | struct device *device; | |
428 | int count; | |
429 | struct list_head tz_list; | |
430 | struct list_head node; | |
431 | }; | |
432 | ||
433 | struct thermal_hwmon_attr { | |
434 | struct device_attribute attr; | |
435 | char name[16]; | |
436 | }; | |
437 | ||
438 | /* one temperature input for each thermal zone */ | |
439 | struct thermal_hwmon_temp { | |
440 | struct list_head hwmon_node; | |
441 | struct thermal_zone_device *tz; | |
442 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
443 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
444 | }; | |
445 | ||
e68b16ab ZR |
446 | static LIST_HEAD(thermal_hwmon_list); |
447 | ||
448 | static ssize_t | |
449 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
450 | { | |
0e968a3b | 451 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
452 | return sprintf(buf, "%s\n", hwmon->type); |
453 | } | |
454 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
455 | ||
456 | static ssize_t | |
457 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
458 | { | |
6503e5df MG |
459 | long temperature; |
460 | int ret; | |
e68b16ab ZR |
461 | struct thermal_hwmon_attr *hwmon_attr |
462 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
463 | struct thermal_hwmon_temp *temp |
464 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 465 | temp_input); |
31f5396a | 466 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 467 | |
6503e5df MG |
468 | ret = tz->ops->get_temp(tz, &temperature); |
469 | ||
470 | if (ret) | |
471 | return ret; | |
472 | ||
473 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
474 | } |
475 | ||
476 | static ssize_t | |
477 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
478 | char *buf) | |
479 | { | |
480 | struct thermal_hwmon_attr *hwmon_attr | |
481 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
482 | struct thermal_hwmon_temp *temp |
483 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 484 | temp_crit); |
31f5396a | 485 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
486 | long temperature; |
487 | int ret; | |
488 | ||
489 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
490 | if (ret) | |
491 | return ret; | |
e68b16ab | 492 | |
6503e5df | 493 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
494 | } |
495 | ||
496 | ||
0d97d7a4 JD |
497 | static struct thermal_hwmon_device * |
498 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
499 | { |
500 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
501 | |
502 | mutex_lock(&thermal_list_lock); | |
503 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
504 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 505 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 506 | return hwmon; |
e68b16ab ZR |
507 | } |
508 | mutex_unlock(&thermal_list_lock); | |
509 | ||
0d97d7a4 JD |
510 | return NULL; |
511 | } | |
512 | ||
31f5396a JD |
513 | /* Find the temperature input matching a given thermal zone */ |
514 | static struct thermal_hwmon_temp * | |
515 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
516 | const struct thermal_zone_device *tz) | |
517 | { | |
518 | struct thermal_hwmon_temp *temp; | |
519 | ||
520 | mutex_lock(&thermal_list_lock); | |
521 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
522 | if (temp->tz == tz) { | |
523 | mutex_unlock(&thermal_list_lock); | |
524 | return temp; | |
525 | } | |
526 | mutex_unlock(&thermal_list_lock); | |
527 | ||
528 | return NULL; | |
529 | } | |
530 | ||
0d97d7a4 JD |
531 | static int |
532 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
533 | { | |
534 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 535 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
536 | int new_hwmon_device = 1; |
537 | int result; | |
538 | ||
539 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
540 | if (hwmon) { | |
541 | new_hwmon_device = 0; | |
542 | goto register_sys_interface; | |
543 | } | |
544 | ||
e68b16ab ZR |
545 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
546 | if (!hwmon) | |
547 | return -ENOMEM; | |
548 | ||
549 | INIT_LIST_HEAD(&hwmon->tz_list); | |
550 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
551 | hwmon->device = hwmon_device_register(NULL); | |
552 | if (IS_ERR(hwmon->device)) { | |
553 | result = PTR_ERR(hwmon->device); | |
554 | goto free_mem; | |
555 | } | |
0e968a3b | 556 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
557 | result = device_create_file(hwmon->device, &dev_attr_name); |
558 | if (result) | |
b299eb5c | 559 | goto free_mem; |
e68b16ab ZR |
560 | |
561 | register_sys_interface: | |
31f5396a JD |
562 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
563 | if (!temp) { | |
564 | result = -ENOMEM; | |
565 | goto unregister_name; | |
566 | } | |
567 | ||
568 | temp->tz = tz; | |
e68b16ab ZR |
569 | hwmon->count++; |
570 | ||
31f5396a | 571 | snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH, |
e68b16ab | 572 | "temp%d_input", hwmon->count); |
31f5396a JD |
573 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
574 | temp->temp_input.attr.attr.mode = 0444; | |
575 | temp->temp_input.attr.show = temp_input_show; | |
576 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
577 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 578 | if (result) |
31f5396a | 579 | goto free_temp_mem; |
e68b16ab ZR |
580 | |
581 | if (tz->ops->get_crit_temp) { | |
582 | unsigned long temperature; | |
583 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
31f5396a | 584 | snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH, |
e68b16ab | 585 | "temp%d_crit", hwmon->count); |
31f5396a JD |
586 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
587 | temp->temp_crit.attr.attr.mode = 0444; | |
588 | temp->temp_crit.attr.show = temp_crit_show; | |
589 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 590 | result = device_create_file(hwmon->device, |
31f5396a | 591 | &temp->temp_crit.attr); |
e68b16ab | 592 | if (result) |
b299eb5c | 593 | goto unregister_input; |
e68b16ab ZR |
594 | } |
595 | } | |
596 | ||
597 | mutex_lock(&thermal_list_lock); | |
598 | if (new_hwmon_device) | |
599 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 600 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
601 | mutex_unlock(&thermal_list_lock); |
602 | ||
603 | return 0; | |
604 | ||
b299eb5c | 605 | unregister_input: |
31f5396a JD |
606 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
607 | free_temp_mem: | |
608 | kfree(temp); | |
b299eb5c | 609 | unregister_name: |
e68b16ab ZR |
610 | if (new_hwmon_device) { |
611 | device_remove_file(hwmon->device, &dev_attr_name); | |
612 | hwmon_device_unregister(hwmon->device); | |
613 | } | |
614 | free_mem: | |
615 | if (new_hwmon_device) | |
616 | kfree(hwmon); | |
617 | ||
618 | return result; | |
619 | } | |
620 | ||
621 | static void | |
622 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
623 | { | |
31f5396a JD |
624 | struct thermal_hwmon_device *hwmon; |
625 | struct thermal_hwmon_temp *temp; | |
626 | ||
627 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
628 | if (unlikely(!hwmon)) { | |
629 | /* Should never happen... */ | |
630 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
631 | return; | |
632 | } | |
633 | ||
634 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
635 | if (unlikely(!temp)) { | |
636 | /* Should never happen... */ | |
637 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
638 | return; | |
639 | } | |
e68b16ab | 640 | |
31f5396a | 641 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 642 | if (tz->ops->get_crit_temp) |
31f5396a | 643 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
644 | |
645 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
646 | list_del(&temp->hwmon_node); |
647 | kfree(temp); | |
e68b16ab ZR |
648 | if (!list_empty(&hwmon->tz_list)) { |
649 | mutex_unlock(&thermal_list_lock); | |
650 | return; | |
651 | } | |
652 | list_del(&hwmon->node); | |
653 | mutex_unlock(&thermal_list_lock); | |
654 | ||
655 | device_remove_file(hwmon->device, &dev_attr_name); | |
656 | hwmon_device_unregister(hwmon->device); | |
657 | kfree(hwmon); | |
658 | } | |
659 | #else | |
660 | static int | |
661 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
662 | { | |
663 | return 0; | |
664 | } | |
665 | ||
666 | static void | |
667 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
668 | { | |
669 | } | |
670 | #endif | |
671 | ||
b1569e99 MG |
672 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
673 | int delay) | |
674 | { | |
675 | cancel_delayed_work(&(tz->poll_queue)); | |
676 | ||
677 | if (!delay) | |
678 | return; | |
679 | ||
680 | if (delay > 1000) | |
51e20d0e | 681 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
682 | round_jiffies(msecs_to_jiffies(delay))); |
683 | else | |
51e20d0e | 684 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
685 | msecs_to_jiffies(delay)); |
686 | } | |
687 | ||
688 | static void thermal_zone_device_passive(struct thermal_zone_device *tz, | |
689 | int temp, int trip_temp, int trip) | |
690 | { | |
691 | int trend = 0; | |
692 | struct thermal_cooling_device_instance *instance; | |
693 | struct thermal_cooling_device *cdev; | |
694 | long state, max_state; | |
695 | ||
696 | /* | |
697 | * Above Trip? | |
698 | * ----------- | |
699 | * Calculate the thermal trend (using the passive cooling equation) | |
700 | * and modify the performance limit for all passive cooling devices | |
701 | * accordingly. Note that we assume symmetry. | |
702 | */ | |
703 | if (temp >= trip_temp) { | |
704 | tz->passive = true; | |
705 | ||
706 | trend = (tz->tc1 * (temp - tz->last_temperature)) + | |
707 | (tz->tc2 * (temp - trip_temp)); | |
708 | ||
709 | /* Heating up? */ | |
710 | if (trend > 0) { | |
711 | list_for_each_entry(instance, &tz->cooling_devices, | |
712 | node) { | |
713 | if (instance->trip != trip) | |
714 | continue; | |
715 | cdev = instance->cdev; | |
716 | cdev->ops->get_cur_state(cdev, &state); | |
717 | cdev->ops->get_max_state(cdev, &max_state); | |
718 | if (state++ < max_state) | |
719 | cdev->ops->set_cur_state(cdev, state); | |
720 | } | |
721 | } else if (trend < 0) { /* Cooling off? */ | |
722 | list_for_each_entry(instance, &tz->cooling_devices, | |
723 | node) { | |
724 | if (instance->trip != trip) | |
725 | continue; | |
726 | cdev = instance->cdev; | |
727 | cdev->ops->get_cur_state(cdev, &state); | |
728 | cdev->ops->get_max_state(cdev, &max_state); | |
729 | if (state > 0) | |
730 | cdev->ops->set_cur_state(cdev, --state); | |
731 | } | |
732 | } | |
733 | return; | |
734 | } | |
735 | ||
736 | /* | |
737 | * Below Trip? | |
738 | * ----------- | |
739 | * Implement passive cooling hysteresis to slowly increase performance | |
740 | * and avoid thrashing around the passive trip point. Note that we | |
741 | * assume symmetry. | |
742 | */ | |
743 | list_for_each_entry(instance, &tz->cooling_devices, node) { | |
744 | if (instance->trip != trip) | |
745 | continue; | |
746 | cdev = instance->cdev; | |
747 | cdev->ops->get_cur_state(cdev, &state); | |
748 | cdev->ops->get_max_state(cdev, &max_state); | |
749 | if (state > 0) | |
750 | cdev->ops->set_cur_state(cdev, --state); | |
751 | if (state == 0) | |
752 | tz->passive = false; | |
753 | } | |
754 | } | |
755 | ||
756 | static void thermal_zone_device_check(struct work_struct *work) | |
757 | { | |
758 | struct thermal_zone_device *tz = container_of(work, struct | |
759 | thermal_zone_device, | |
760 | poll_queue.work); | |
761 | thermal_zone_device_update(tz); | |
762 | } | |
e68b16ab | 763 | |
203d3d4a ZR |
764 | /** |
765 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
766 | * @tz: thermal zone device |
767 | * @trip: indicates which trip point the cooling devices is | |
768 | * associated with in this thermal zone. | |
769 | * @cdev: thermal cooling device | |
543a9561 LB |
770 | * |
771 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
772 | */ |
773 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
774 | int trip, | |
775 | struct thermal_cooling_device *cdev) | |
776 | { | |
777 | struct thermal_cooling_device_instance *dev; | |
778 | struct thermal_cooling_device_instance *pos; | |
c7516709 TS |
779 | struct thermal_zone_device *pos1; |
780 | struct thermal_cooling_device *pos2; | |
203d3d4a ZR |
781 | int result; |
782 | ||
543a9561 | 783 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
784 | return -EINVAL; |
785 | ||
c7516709 TS |
786 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
787 | if (pos1 == tz) | |
788 | break; | |
789 | } | |
790 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
791 | if (pos2 == cdev) | |
792 | break; | |
793 | } | |
794 | ||
795 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
796 | return -EINVAL; |
797 | ||
798 | dev = | |
799 | kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); | |
800 | if (!dev) | |
801 | return -ENOMEM; | |
802 | dev->tz = tz; | |
803 | dev->cdev = cdev; | |
804 | dev->trip = trip; | |
805 | result = get_idr(&tz->idr, &tz->lock, &dev->id); | |
806 | if (result) | |
807 | goto free_mem; | |
808 | ||
809 | sprintf(dev->name, "cdev%d", dev->id); | |
810 | result = | |
811 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
812 | if (result) | |
813 | goto release_idr; | |
814 | ||
815 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 816 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
817 | dev->attr.attr.name = dev->attr_name; |
818 | dev->attr.attr.mode = 0444; | |
819 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
820 | result = device_create_file(&tz->device, &dev->attr); | |
821 | if (result) | |
822 | goto remove_symbol_link; | |
823 | ||
824 | mutex_lock(&tz->lock); | |
825 | list_for_each_entry(pos, &tz->cooling_devices, node) | |
826 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
827 | result = -EEXIST; | |
828 | break; | |
829 | } | |
830 | if (!result) | |
831 | list_add_tail(&dev->node, &tz->cooling_devices); | |
832 | mutex_unlock(&tz->lock); | |
833 | ||
834 | if (!result) | |
835 | return 0; | |
836 | ||
837 | device_remove_file(&tz->device, &dev->attr); | |
838 | remove_symbol_link: | |
839 | sysfs_remove_link(&tz->device.kobj, dev->name); | |
840 | release_idr: | |
841 | release_idr(&tz->idr, &tz->lock, dev->id); | |
842 | free_mem: | |
843 | kfree(dev); | |
844 | return result; | |
845 | } | |
543a9561 | 846 | |
203d3d4a ZR |
847 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); |
848 | ||
849 | /** | |
850 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
851 | * @tz: thermal zone device |
852 | * @trip: indicates which trip point the cooling devices is | |
853 | * associated with in this thermal zone. | |
854 | * @cdev: thermal cooling device | |
543a9561 LB |
855 | * |
856 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
857 | */ |
858 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
859 | int trip, | |
860 | struct thermal_cooling_device *cdev) | |
861 | { | |
862 | struct thermal_cooling_device_instance *pos, *next; | |
863 | ||
864 | mutex_lock(&tz->lock); | |
865 | list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) { | |
543a9561 | 866 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
203d3d4a ZR |
867 | list_del(&pos->node); |
868 | mutex_unlock(&tz->lock); | |
869 | goto unbind; | |
870 | } | |
871 | } | |
872 | mutex_unlock(&tz->lock); | |
873 | ||
874 | return -ENODEV; | |
875 | ||
876 | unbind: | |
877 | device_remove_file(&tz->device, &pos->attr); | |
878 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
879 | release_idr(&tz->idr, &tz->lock, pos->id); | |
880 | kfree(pos); | |
881 | return 0; | |
882 | } | |
543a9561 | 883 | |
203d3d4a ZR |
884 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); |
885 | ||
886 | static void thermal_release(struct device *dev) | |
887 | { | |
888 | struct thermal_zone_device *tz; | |
889 | struct thermal_cooling_device *cdev; | |
890 | ||
354655ea | 891 | if (!strncmp(dev_name(dev), "thermal_zone", sizeof "thermal_zone" - 1)) { |
203d3d4a ZR |
892 | tz = to_thermal_zone(dev); |
893 | kfree(tz); | |
894 | } else { | |
895 | cdev = to_cooling_device(dev); | |
896 | kfree(cdev); | |
897 | } | |
898 | } | |
899 | ||
900 | static struct class thermal_class = { | |
901 | .name = "thermal", | |
902 | .dev_release = thermal_release, | |
903 | }; | |
904 | ||
905 | /** | |
906 | * thermal_cooling_device_register - register a new thermal cooling device | |
907 | * @type: the thermal cooling device type. | |
908 | * @devdata: device private data. | |
909 | * @ops: standard thermal cooling devices callbacks. | |
910 | */ | |
5b275ce2 AC |
911 | struct thermal_cooling_device *thermal_cooling_device_register( |
912 | char *type, void *devdata, const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
913 | { |
914 | struct thermal_cooling_device *cdev; | |
915 | struct thermal_zone_device *pos; | |
916 | int result; | |
917 | ||
918 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 919 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
920 | |
921 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 922 | !ops->set_cur_state) |
3e6fda5c | 923 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
924 | |
925 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
926 | if (!cdev) | |
3e6fda5c | 927 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
928 | |
929 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
930 | if (result) { | |
931 | kfree(cdev); | |
3e6fda5c | 932 | return ERR_PTR(result); |
203d3d4a ZR |
933 | } |
934 | ||
935 | strcpy(cdev->type, type); | |
936 | cdev->ops = ops; | |
937 | cdev->device.class = &thermal_class; | |
938 | cdev->devdata = devdata; | |
354655ea | 939 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
940 | result = device_register(&cdev->device); |
941 | if (result) { | |
942 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
943 | kfree(cdev); | |
3e6fda5c | 944 | return ERR_PTR(result); |
203d3d4a ZR |
945 | } |
946 | ||
947 | /* sys I/F */ | |
948 | if (type) { | |
543a9561 | 949 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
950 | if (result) |
951 | goto unregister; | |
952 | } | |
953 | ||
954 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
955 | if (result) | |
956 | goto unregister; | |
957 | ||
958 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
959 | if (result) | |
960 | goto unregister; | |
961 | ||
962 | mutex_lock(&thermal_list_lock); | |
963 | list_add(&cdev->node, &thermal_cdev_list); | |
964 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
965 | if (!pos->ops->bind) | |
966 | continue; | |
967 | result = pos->ops->bind(pos, cdev); | |
968 | if (result) | |
969 | break; | |
970 | ||
971 | } | |
972 | mutex_unlock(&thermal_list_lock); | |
973 | ||
974 | if (!result) | |
975 | return cdev; | |
976 | ||
977 | unregister: | |
978 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
979 | device_unregister(&cdev->device); | |
3e6fda5c | 980 | return ERR_PTR(result); |
203d3d4a | 981 | } |
543a9561 | 982 | |
203d3d4a ZR |
983 | EXPORT_SYMBOL(thermal_cooling_device_register); |
984 | ||
985 | /** | |
986 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
987 | * @cdev: the thermal cooling device to remove. |
988 | * | |
989 | * thermal_cooling_device_unregister() must be called when the device is no | |
990 | * longer needed. | |
991 | */ | |
992 | void thermal_cooling_device_unregister(struct | |
993 | thermal_cooling_device | |
994 | *cdev) | |
995 | { | |
996 | struct thermal_zone_device *tz; | |
997 | struct thermal_cooling_device *pos = NULL; | |
998 | ||
999 | if (!cdev) | |
1000 | return; | |
1001 | ||
1002 | mutex_lock(&thermal_list_lock); | |
1003 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1004 | if (pos == cdev) | |
1005 | break; | |
1006 | if (pos != cdev) { | |
1007 | /* thermal cooling device not found */ | |
1008 | mutex_unlock(&thermal_list_lock); | |
1009 | return; | |
1010 | } | |
1011 | list_del(&cdev->node); | |
1012 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1013 | if (!tz->ops->unbind) | |
1014 | continue; | |
1015 | tz->ops->unbind(tz, cdev); | |
1016 | } | |
1017 | mutex_unlock(&thermal_list_lock); | |
1018 | if (cdev->type[0]) | |
543a9561 | 1019 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1020 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1021 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1022 | ||
1023 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1024 | device_unregister(&cdev->device); | |
1025 | return; | |
1026 | } | |
543a9561 | 1027 | |
203d3d4a ZR |
1028 | EXPORT_SYMBOL(thermal_cooling_device_unregister); |
1029 | ||
b1569e99 MG |
1030 | /** |
1031 | * thermal_zone_device_update - force an update of a thermal zone's state | |
1032 | * @ttz: the thermal zone to update | |
1033 | */ | |
1034 | ||
1035 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
1036 | { | |
1037 | int count, ret = 0; | |
1038 | long temp, trip_temp; | |
1039 | enum thermal_trip_type trip_type; | |
1040 | struct thermal_cooling_device_instance *instance; | |
1041 | struct thermal_cooling_device *cdev; | |
1042 | ||
1043 | mutex_lock(&tz->lock); | |
1044 | ||
0d288162 MB |
1045 | if (tz->ops->get_temp(tz, &temp)) { |
1046 | /* get_temp failed - retry it later */ | |
1047 | printk(KERN_WARNING PREFIX "failed to read out thermal zone " | |
1048 | "%d\n", tz->id); | |
1049 | goto leave; | |
1050 | } | |
b1569e99 MG |
1051 | |
1052 | for (count = 0; count < tz->trips; count++) { | |
1053 | tz->ops->get_trip_type(tz, count, &trip_type); | |
1054 | tz->ops->get_trip_temp(tz, count, &trip_temp); | |
1055 | ||
1056 | switch (trip_type) { | |
1057 | case THERMAL_TRIP_CRITICAL: | |
29321357 | 1058 | if (temp >= trip_temp) { |
b1569e99 MG |
1059 | if (tz->ops->notify) |
1060 | ret = tz->ops->notify(tz, count, | |
1061 | trip_type); | |
1062 | if (!ret) { | |
1063 | printk(KERN_EMERG | |
1064 | "Critical temperature reached (%ld C), shutting down.\n", | |
1065 | temp/1000); | |
1066 | orderly_poweroff(true); | |
1067 | } | |
1068 | } | |
1069 | break; | |
1070 | case THERMAL_TRIP_HOT: | |
29321357 | 1071 | if (temp >= trip_temp) |
b1569e99 MG |
1072 | if (tz->ops->notify) |
1073 | tz->ops->notify(tz, count, trip_type); | |
1074 | break; | |
1075 | case THERMAL_TRIP_ACTIVE: | |
1076 | list_for_each_entry(instance, &tz->cooling_devices, | |
1077 | node) { | |
1078 | if (instance->trip != count) | |
1079 | continue; | |
1080 | ||
1081 | cdev = instance->cdev; | |
1082 | ||
29321357 | 1083 | if (temp >= trip_temp) |
b1569e99 MG |
1084 | cdev->ops->set_cur_state(cdev, 1); |
1085 | else | |
1086 | cdev->ops->set_cur_state(cdev, 0); | |
1087 | } | |
1088 | break; | |
1089 | case THERMAL_TRIP_PASSIVE: | |
29321357 | 1090 | if (temp >= trip_temp || tz->passive) |
b1569e99 MG |
1091 | thermal_zone_device_passive(tz, temp, |
1092 | trip_temp, count); | |
1093 | break; | |
1094 | } | |
1095 | } | |
03a971a2 MG |
1096 | |
1097 | if (tz->forced_passive) | |
1098 | thermal_zone_device_passive(tz, temp, tz->forced_passive, | |
1099 | THERMAL_TRIPS_NONE); | |
1100 | ||
b1569e99 | 1101 | tz->last_temperature = temp; |
0d288162 MB |
1102 | |
1103 | leave: | |
b1569e99 MG |
1104 | if (tz->passive) |
1105 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
1106 | else if (tz->polling_delay) | |
1107 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
3767cb54 FP |
1108 | else |
1109 | thermal_zone_device_set_polling(tz, 0); | |
b1569e99 MG |
1110 | mutex_unlock(&tz->lock); |
1111 | } | |
1112 | EXPORT_SYMBOL(thermal_zone_device_update); | |
1113 | ||
203d3d4a ZR |
1114 | /** |
1115 | * thermal_zone_device_register - register a new thermal zone device | |
1116 | * @type: the thermal zone device type | |
1117 | * @trips: the number of trip points the thermal zone support | |
1118 | * @devdata: private device data | |
1119 | * @ops: standard thermal zone device callbacks | |
b1569e99 MG |
1120 | * @tc1: thermal coefficient 1 for passive calculations |
1121 | * @tc2: thermal coefficient 2 for passive calculations | |
1122 | * @passive_delay: number of milliseconds to wait between polls when | |
1123 | * performing passive cooling | |
1124 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1125 | * whether trip points have been crossed (0 for interrupt | |
1126 | * driven systems) | |
203d3d4a ZR |
1127 | * |
1128 | * thermal_zone_device_unregister() must be called when the device is no | |
b1569e99 MG |
1129 | * longer needed. The passive cooling formula uses tc1 and tc2 as described in |
1130 | * section 11.1.5.1 of the ACPI specification 3.0. | |
203d3d4a ZR |
1131 | */ |
1132 | struct thermal_zone_device *thermal_zone_device_register(char *type, | |
5b275ce2 AC |
1133 | int trips, void *devdata, |
1134 | const struct thermal_zone_device_ops *ops, | |
1135 | int tc1, int tc2, int passive_delay, int polling_delay) | |
203d3d4a ZR |
1136 | { |
1137 | struct thermal_zone_device *tz; | |
1138 | struct thermal_cooling_device *pos; | |
03a971a2 | 1139 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1140 | int result; |
1141 | int count; | |
03a971a2 | 1142 | int passive = 0; |
203d3d4a ZR |
1143 | |
1144 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 1145 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1146 | |
1147 | if (trips > THERMAL_MAX_TRIPS || trips < 0) | |
3e6fda5c | 1148 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1149 | |
1150 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1151 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1152 | |
1153 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); | |
1154 | if (!tz) | |
3e6fda5c | 1155 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1156 | |
1157 | INIT_LIST_HEAD(&tz->cooling_devices); | |
1158 | idr_init(&tz->idr); | |
1159 | mutex_init(&tz->lock); | |
1160 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1161 | if (result) { | |
1162 | kfree(tz); | |
3e6fda5c | 1163 | return ERR_PTR(result); |
203d3d4a ZR |
1164 | } |
1165 | ||
1166 | strcpy(tz->type, type); | |
1167 | tz->ops = ops; | |
1168 | tz->device.class = &thermal_class; | |
1169 | tz->devdata = devdata; | |
1170 | tz->trips = trips; | |
b1569e99 MG |
1171 | tz->tc1 = tc1; |
1172 | tz->tc2 = tc2; | |
1173 | tz->passive_delay = passive_delay; | |
1174 | tz->polling_delay = polling_delay; | |
1175 | ||
354655ea | 1176 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1177 | result = device_register(&tz->device); |
1178 | if (result) { | |
1179 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1180 | kfree(tz); | |
3e6fda5c | 1181 | return ERR_PTR(result); |
203d3d4a ZR |
1182 | } |
1183 | ||
1184 | /* sys I/F */ | |
1185 | if (type) { | |
1186 | result = device_create_file(&tz->device, &dev_attr_type); | |
1187 | if (result) | |
1188 | goto unregister; | |
1189 | } | |
1190 | ||
1191 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1192 | if (result) | |
1193 | goto unregister; | |
1194 | ||
1195 | if (ops->get_mode) { | |
1196 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1197 | if (result) | |
1198 | goto unregister; | |
1199 | } | |
1200 | ||
1201 | for (count = 0; count < trips; count++) { | |
1202 | TRIP_POINT_ATTR_ADD(&tz->device, count, result); | |
1203 | if (result) | |
1204 | goto unregister; | |
03a971a2 MG |
1205 | tz->ops->get_trip_type(tz, count, &trip_type); |
1206 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1207 | passive = 1; | |
203d3d4a ZR |
1208 | } |
1209 | ||
03a971a2 MG |
1210 | if (!passive) |
1211 | result = device_create_file(&tz->device, | |
1212 | &dev_attr_passive); | |
1213 | ||
1214 | if (result) | |
1215 | goto unregister; | |
1216 | ||
e68b16ab ZR |
1217 | result = thermal_add_hwmon_sysfs(tz); |
1218 | if (result) | |
1219 | goto unregister; | |
1220 | ||
203d3d4a ZR |
1221 | mutex_lock(&thermal_list_lock); |
1222 | list_add_tail(&tz->node, &thermal_tz_list); | |
1223 | if (ops->bind) | |
1224 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
543a9561 LB |
1225 | result = ops->bind(tz, pos); |
1226 | if (result) | |
1227 | break; | |
203d3d4a ZR |
1228 | } |
1229 | mutex_unlock(&thermal_list_lock); | |
1230 | ||
b1569e99 MG |
1231 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1232 | ||
1233 | thermal_zone_device_update(tz); | |
1234 | ||
203d3d4a ZR |
1235 | if (!result) |
1236 | return tz; | |
1237 | ||
1238 | unregister: | |
1239 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1240 | device_unregister(&tz->device); | |
3e6fda5c | 1241 | return ERR_PTR(result); |
203d3d4a | 1242 | } |
543a9561 | 1243 | |
203d3d4a ZR |
1244 | EXPORT_SYMBOL(thermal_zone_device_register); |
1245 | ||
1246 | /** | |
1247 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1248 | * @tz: the thermal zone device to remove |
1249 | */ | |
1250 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1251 | { | |
1252 | struct thermal_cooling_device *cdev; | |
1253 | struct thermal_zone_device *pos = NULL; | |
1254 | int count; | |
1255 | ||
1256 | if (!tz) | |
1257 | return; | |
1258 | ||
1259 | mutex_lock(&thermal_list_lock); | |
1260 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1261 | if (pos == tz) | |
1262 | break; | |
1263 | if (pos != tz) { | |
1264 | /* thermal zone device not found */ | |
1265 | mutex_unlock(&thermal_list_lock); | |
1266 | return; | |
1267 | } | |
1268 | list_del(&tz->node); | |
1269 | if (tz->ops->unbind) | |
1270 | list_for_each_entry(cdev, &thermal_cdev_list, node) | |
1271 | tz->ops->unbind(tz, cdev); | |
1272 | mutex_unlock(&thermal_list_lock); | |
1273 | ||
b1569e99 MG |
1274 | thermal_zone_device_set_polling(tz, 0); |
1275 | ||
203d3d4a ZR |
1276 | if (tz->type[0]) |
1277 | device_remove_file(&tz->device, &dev_attr_type); | |
1278 | device_remove_file(&tz->device, &dev_attr_temp); | |
1279 | if (tz->ops->get_mode) | |
1280 | device_remove_file(&tz->device, &dev_attr_mode); | |
1281 | ||
1282 | for (count = 0; count < tz->trips; count++) | |
1283 | TRIP_POINT_ATTR_REMOVE(&tz->device, count); | |
1284 | ||
e68b16ab | 1285 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1286 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1287 | idr_destroy(&tz->idr); | |
1288 | mutex_destroy(&tz->lock); | |
1289 | device_unregister(&tz->device); | |
1290 | return; | |
1291 | } | |
543a9561 | 1292 | |
203d3d4a ZR |
1293 | EXPORT_SYMBOL(thermal_zone_device_unregister); |
1294 | ||
af06216a RW |
1295 | #ifdef CONFIG_NET |
1296 | static struct genl_family thermal_event_genl_family = { | |
1297 | .id = GENL_ID_GENERATE, | |
1298 | .name = THERMAL_GENL_FAMILY_NAME, | |
1299 | .version = THERMAL_GENL_VERSION, | |
1300 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1301 | }; | |
1302 | ||
1303 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1304 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1305 | }; | |
1306 | ||
4cb18728 D |
1307 | int generate_netlink_event(u32 orig, enum events event) |
1308 | { | |
1309 | struct sk_buff *skb; | |
1310 | struct nlattr *attr; | |
1311 | struct thermal_genl_event *thermal_event; | |
1312 | void *msg_header; | |
1313 | int size; | |
1314 | int result; | |
1315 | ||
1316 | /* allocate memory */ | |
1317 | size = nla_total_size(sizeof(struct thermal_genl_event)) + \ | |
1318 | nla_total_size(0); | |
1319 | ||
1320 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1321 | if (!skb) | |
1322 | return -ENOMEM; | |
1323 | ||
1324 | /* add the genetlink message header */ | |
1325 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1326 | &thermal_event_genl_family, 0, | |
1327 | THERMAL_GENL_CMD_EVENT); | |
1328 | if (!msg_header) { | |
1329 | nlmsg_free(skb); | |
1330 | return -ENOMEM; | |
1331 | } | |
1332 | ||
1333 | /* fill the data */ | |
1334 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, \ | |
1335 | sizeof(struct thermal_genl_event)); | |
1336 | ||
1337 | if (!attr) { | |
1338 | nlmsg_free(skb); | |
1339 | return -EINVAL; | |
1340 | } | |
1341 | ||
1342 | thermal_event = nla_data(attr); | |
1343 | if (!thermal_event) { | |
1344 | nlmsg_free(skb); | |
1345 | return -EINVAL; | |
1346 | } | |
1347 | ||
1348 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1349 | ||
1350 | thermal_event->orig = orig; | |
1351 | thermal_event->event = event; | |
1352 | ||
1353 | /* send multicast genetlink message */ | |
1354 | result = genlmsg_end(skb, msg_header); | |
1355 | if (result < 0) { | |
1356 | nlmsg_free(skb); | |
1357 | return result; | |
1358 | } | |
1359 | ||
1360 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1361 | if (result) | |
1362 | printk(KERN_INFO "failed to send netlink event:%d", result); | |
1363 | ||
1364 | return result; | |
1365 | } | |
1366 | EXPORT_SYMBOL(generate_netlink_event); | |
1367 | ||
1368 | static int genetlink_init(void) | |
1369 | { | |
1370 | int result; | |
1371 | ||
1372 | result = genl_register_family(&thermal_event_genl_family); | |
1373 | if (result) | |
1374 | return result; | |
1375 | ||
1376 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1377 | &thermal_event_mcgrp); | |
1378 | if (result) | |
1379 | genl_unregister_family(&thermal_event_genl_family); | |
1380 | return result; | |
1381 | } | |
1382 | ||
af06216a RW |
1383 | static void genetlink_exit(void) |
1384 | { | |
1385 | genl_unregister_family(&thermal_event_genl_family); | |
1386 | } | |
1387 | #else /* !CONFIG_NET */ | |
1388 | static inline int genetlink_init(void) { return 0; } | |
1389 | static inline void genetlink_exit(void) {} | |
1390 | #endif /* !CONFIG_NET */ | |
1391 | ||
203d3d4a ZR |
1392 | static int __init thermal_init(void) |
1393 | { | |
1394 | int result = 0; | |
1395 | ||
1396 | result = class_register(&thermal_class); | |
1397 | if (result) { | |
1398 | idr_destroy(&thermal_tz_idr); | |
1399 | idr_destroy(&thermal_cdev_idr); | |
1400 | mutex_destroy(&thermal_idr_lock); | |
1401 | mutex_destroy(&thermal_list_lock); | |
1402 | } | |
4cb18728 | 1403 | result = genetlink_init(); |
203d3d4a ZR |
1404 | return result; |
1405 | } | |
1406 | ||
1407 | static void __exit thermal_exit(void) | |
1408 | { | |
1409 | class_unregister(&thermal_class); | |
1410 | idr_destroy(&thermal_tz_idr); | |
1411 | idr_destroy(&thermal_cdev_idr); | |
1412 | mutex_destroy(&thermal_idr_lock); | |
1413 | mutex_destroy(&thermal_list_lock); | |
4cb18728 | 1414 | genetlink_exit(); |
203d3d4a ZR |
1415 | } |
1416 | ||
4cb18728 | 1417 | fs_initcall(thermal_init); |
203d3d4a | 1418 | module_exit(thermal_exit); |