Commit | Line | Data |
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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 | ||
c5a01dd5 JP |
26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
27 | ||
203d3d4a ZR |
28 | #include <linux/module.h> |
29 | #include <linux/device.h> | |
30 | #include <linux/err.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
203d3d4a ZR |
32 | #include <linux/kdev_t.h> |
33 | #include <linux/idr.h> | |
34 | #include <linux/thermal.h> | |
35 | #include <linux/spinlock.h> | |
b1569e99 | 36 | #include <linux/reboot.h> |
4cb18728 D |
37 | #include <net/netlink.h> |
38 | #include <net/genetlink.h> | |
203d3d4a | 39 | |
63c4ec90 | 40 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a ZR |
41 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
203d3d4a ZR |
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 | ||
caca8b80 | 67 | again: |
203d3d4a ZR |
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 | ||
125c4c70 | 81 | *id = *id & MAX_IDR_MASK; |
203d3d4a ZR |
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 | ||
f1f0e2ac | 153 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 154 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 155 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
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 | ||
c56f5c03 D |
198 | static ssize_t |
199 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
200 | const char *buf, size_t count) | |
201 | { | |
202 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
203 | int trip, ret; | |
204 | unsigned long temperature; | |
205 | ||
206 | if (!tz->ops->set_trip_temp) | |
207 | return -EPERM; | |
208 | ||
209 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
210 | return -EINVAL; | |
211 | ||
212 | if (kstrtoul(buf, 10, &temperature)) | |
213 | return -EINVAL; | |
214 | ||
215 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
216 | ||
217 | return ret ? ret : count; | |
218 | } | |
219 | ||
203d3d4a ZR |
220 | static ssize_t |
221 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
222 | char *buf) | |
223 | { | |
224 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
225 | int trip, ret; |
226 | long temperature; | |
203d3d4a ZR |
227 | |
228 | if (!tz->ops->get_trip_temp) | |
229 | return -EPERM; | |
230 | ||
231 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
232 | return -EINVAL; | |
233 | ||
6503e5df MG |
234 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
235 | ||
236 | if (ret) | |
237 | return ret; | |
238 | ||
239 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
240 | } |
241 | ||
27365a6c D |
242 | static ssize_t |
243 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
244 | const char *buf, size_t count) | |
245 | { | |
246 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
247 | int trip, ret; | |
248 | unsigned long temperature; | |
249 | ||
250 | if (!tz->ops->set_trip_hyst) | |
251 | return -EPERM; | |
252 | ||
253 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
254 | return -EINVAL; | |
255 | ||
256 | if (kstrtoul(buf, 10, &temperature)) | |
257 | return -EINVAL; | |
258 | ||
259 | /* | |
260 | * We are not doing any check on the 'temperature' value | |
261 | * here. The driver implementing 'set_trip_hyst' has to | |
262 | * take care of this. | |
263 | */ | |
264 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
265 | ||
266 | return ret ? ret : count; | |
267 | } | |
268 | ||
269 | static ssize_t | |
270 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
271 | char *buf) | |
272 | { | |
273 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
274 | int trip, ret; | |
275 | unsigned long temperature; | |
276 | ||
277 | if (!tz->ops->get_trip_hyst) | |
278 | return -EPERM; | |
279 | ||
280 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
281 | return -EINVAL; | |
282 | ||
283 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
284 | ||
285 | return ret ? ret : sprintf(buf, "%ld\n", temperature); | |
286 | } | |
287 | ||
03a971a2 MG |
288 | static ssize_t |
289 | passive_store(struct device *dev, struct device_attribute *attr, | |
290 | const char *buf, size_t count) | |
291 | { | |
292 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
293 | struct thermal_cooling_device *cdev = NULL; | |
294 | int state; | |
295 | ||
296 | if (!sscanf(buf, "%d\n", &state)) | |
297 | return -EINVAL; | |
298 | ||
3d8e3ad8 FP |
299 | /* sanity check: values below 1000 millicelcius don't make sense |
300 | * and can cause the system to go into a thermal heart attack | |
301 | */ | |
302 | if (state && state < 1000) | |
303 | return -EINVAL; | |
304 | ||
03a971a2 MG |
305 | if (state && !tz->forced_passive) { |
306 | mutex_lock(&thermal_list_lock); | |
307 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
308 | if (!strncmp("Processor", cdev->type, | |
309 | sizeof("Processor"))) | |
310 | thermal_zone_bind_cooling_device(tz, | |
311 | THERMAL_TRIPS_NONE, | |
312 | cdev); | |
313 | } | |
314 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
315 | if (!tz->passive_delay) |
316 | tz->passive_delay = 1000; | |
03a971a2 MG |
317 | } else if (!state && tz->forced_passive) { |
318 | mutex_lock(&thermal_list_lock); | |
319 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
320 | if (!strncmp("Processor", cdev->type, | |
321 | sizeof("Processor"))) | |
322 | thermal_zone_unbind_cooling_device(tz, | |
323 | THERMAL_TRIPS_NONE, | |
324 | cdev); | |
325 | } | |
326 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 327 | tz->passive_delay = 0; |
03a971a2 MG |
328 | } |
329 | ||
330 | tz->tc1 = 1; | |
331 | tz->tc2 = 1; | |
332 | ||
03a971a2 MG |
333 | tz->forced_passive = state; |
334 | ||
335 | thermal_zone_device_update(tz); | |
336 | ||
337 | return count; | |
338 | } | |
339 | ||
340 | static ssize_t | |
341 | passive_show(struct device *dev, struct device_attribute *attr, | |
342 | char *buf) | |
343 | { | |
344 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
345 | ||
346 | return sprintf(buf, "%d\n", tz->forced_passive); | |
347 | } | |
348 | ||
203d3d4a ZR |
349 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
350 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
351 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 352 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
203d3d4a | 353 | |
203d3d4a ZR |
354 | /* sys I/F for cooling device */ |
355 | #define to_cooling_device(_dev) \ | |
356 | container_of(_dev, struct thermal_cooling_device, device) | |
357 | ||
358 | static ssize_t | |
359 | thermal_cooling_device_type_show(struct device *dev, | |
360 | struct device_attribute *attr, char *buf) | |
361 | { | |
362 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
363 | ||
364 | return sprintf(buf, "%s\n", cdev->type); | |
365 | } | |
366 | ||
367 | static ssize_t | |
368 | thermal_cooling_device_max_state_show(struct device *dev, | |
369 | struct device_attribute *attr, char *buf) | |
370 | { | |
371 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
372 | unsigned long state; |
373 | int ret; | |
203d3d4a | 374 | |
6503e5df MG |
375 | ret = cdev->ops->get_max_state(cdev, &state); |
376 | if (ret) | |
377 | return ret; | |
378 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
379 | } |
380 | ||
381 | static ssize_t | |
382 | thermal_cooling_device_cur_state_show(struct device *dev, | |
383 | struct device_attribute *attr, char *buf) | |
384 | { | |
385 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
386 | unsigned long state; |
387 | int ret; | |
203d3d4a | 388 | |
6503e5df MG |
389 | ret = cdev->ops->get_cur_state(cdev, &state); |
390 | if (ret) | |
391 | return ret; | |
392 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
393 | } |
394 | ||
395 | static ssize_t | |
396 | thermal_cooling_device_cur_state_store(struct device *dev, | |
397 | struct device_attribute *attr, | |
398 | const char *buf, size_t count) | |
399 | { | |
400 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 401 | unsigned long state; |
203d3d4a ZR |
402 | int result; |
403 | ||
6503e5df | 404 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
405 | return -EINVAL; |
406 | ||
edb94918 | 407 | if ((long)state < 0) |
203d3d4a ZR |
408 | return -EINVAL; |
409 | ||
410 | result = cdev->ops->set_cur_state(cdev, state); | |
411 | if (result) | |
412 | return result; | |
413 | return count; | |
414 | } | |
415 | ||
416 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 417 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
418 | static DEVICE_ATTR(max_state, 0444, |
419 | thermal_cooling_device_max_state_show, NULL); | |
420 | static DEVICE_ATTR(cur_state, 0644, | |
421 | thermal_cooling_device_cur_state_show, | |
422 | thermal_cooling_device_cur_state_store); | |
423 | ||
424 | static ssize_t | |
425 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 426 | struct device_attribute *attr, char *buf) |
203d3d4a ZR |
427 | { |
428 | struct thermal_cooling_device_instance *instance; | |
429 | ||
430 | instance = | |
431 | container_of(attr, struct thermal_cooling_device_instance, attr); | |
432 | ||
433 | if (instance->trip == THERMAL_TRIPS_NONE) | |
434 | return sprintf(buf, "-1\n"); | |
435 | else | |
436 | return sprintf(buf, "%d\n", instance->trip); | |
437 | } | |
438 | ||
439 | /* Device management */ | |
440 | ||
16d75239 RH |
441 | #if defined(CONFIG_THERMAL_HWMON) |
442 | ||
e68b16ab ZR |
443 | /* hwmon sys I/F */ |
444 | #include <linux/hwmon.h> | |
31f5396a JD |
445 | |
446 | /* thermal zone devices with the same type share one hwmon device */ | |
447 | struct thermal_hwmon_device { | |
448 | char type[THERMAL_NAME_LENGTH]; | |
449 | struct device *device; | |
450 | int count; | |
451 | struct list_head tz_list; | |
452 | struct list_head node; | |
453 | }; | |
454 | ||
455 | struct thermal_hwmon_attr { | |
456 | struct device_attribute attr; | |
457 | char name[16]; | |
458 | }; | |
459 | ||
460 | /* one temperature input for each thermal zone */ | |
461 | struct thermal_hwmon_temp { | |
462 | struct list_head hwmon_node; | |
463 | struct thermal_zone_device *tz; | |
464 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
465 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
466 | }; | |
467 | ||
e68b16ab ZR |
468 | static LIST_HEAD(thermal_hwmon_list); |
469 | ||
470 | static ssize_t | |
471 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
472 | { | |
0e968a3b | 473 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
474 | return sprintf(buf, "%s\n", hwmon->type); |
475 | } | |
476 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
477 | ||
478 | static ssize_t | |
479 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
480 | { | |
6503e5df MG |
481 | long temperature; |
482 | int ret; | |
e68b16ab ZR |
483 | struct thermal_hwmon_attr *hwmon_attr |
484 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
485 | struct thermal_hwmon_temp *temp |
486 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 487 | temp_input); |
31f5396a | 488 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 489 | |
6503e5df MG |
490 | ret = tz->ops->get_temp(tz, &temperature); |
491 | ||
492 | if (ret) | |
493 | return ret; | |
494 | ||
495 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
496 | } |
497 | ||
498 | static ssize_t | |
499 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
500 | char *buf) | |
501 | { | |
502 | struct thermal_hwmon_attr *hwmon_attr | |
503 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
504 | struct thermal_hwmon_temp *temp |
505 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 506 | temp_crit); |
31f5396a | 507 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
508 | long temperature; |
509 | int ret; | |
510 | ||
511 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
512 | if (ret) | |
513 | return ret; | |
e68b16ab | 514 | |
6503e5df | 515 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
516 | } |
517 | ||
518 | ||
0d97d7a4 JD |
519 | static struct thermal_hwmon_device * |
520 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
521 | { |
522 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
523 | |
524 | mutex_lock(&thermal_list_lock); | |
525 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
526 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 527 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 528 | return hwmon; |
e68b16ab ZR |
529 | } |
530 | mutex_unlock(&thermal_list_lock); | |
531 | ||
0d97d7a4 JD |
532 | return NULL; |
533 | } | |
534 | ||
31f5396a JD |
535 | /* Find the temperature input matching a given thermal zone */ |
536 | static struct thermal_hwmon_temp * | |
537 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
538 | const struct thermal_zone_device *tz) | |
539 | { | |
540 | struct thermal_hwmon_temp *temp; | |
541 | ||
542 | mutex_lock(&thermal_list_lock); | |
543 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
544 | if (temp->tz == tz) { | |
545 | mutex_unlock(&thermal_list_lock); | |
546 | return temp; | |
547 | } | |
548 | mutex_unlock(&thermal_list_lock); | |
549 | ||
550 | return NULL; | |
551 | } | |
552 | ||
0d97d7a4 JD |
553 | static int |
554 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
555 | { | |
556 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 557 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
558 | int new_hwmon_device = 1; |
559 | int result; | |
560 | ||
561 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
562 | if (hwmon) { | |
563 | new_hwmon_device = 0; | |
564 | goto register_sys_interface; | |
565 | } | |
566 | ||
e68b16ab ZR |
567 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
568 | if (!hwmon) | |
569 | return -ENOMEM; | |
570 | ||
571 | INIT_LIST_HEAD(&hwmon->tz_list); | |
572 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
573 | hwmon->device = hwmon_device_register(NULL); | |
574 | if (IS_ERR(hwmon->device)) { | |
575 | result = PTR_ERR(hwmon->device); | |
576 | goto free_mem; | |
577 | } | |
0e968a3b | 578 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
579 | result = device_create_file(hwmon->device, &dev_attr_name); |
580 | if (result) | |
b299eb5c | 581 | goto free_mem; |
e68b16ab ZR |
582 | |
583 | register_sys_interface: | |
31f5396a JD |
584 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
585 | if (!temp) { | |
586 | result = -ENOMEM; | |
587 | goto unregister_name; | |
588 | } | |
589 | ||
590 | temp->tz = tz; | |
e68b16ab ZR |
591 | hwmon->count++; |
592 | ||
31f5396a | 593 | snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH, |
e68b16ab | 594 | "temp%d_input", hwmon->count); |
31f5396a JD |
595 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
596 | temp->temp_input.attr.attr.mode = 0444; | |
597 | temp->temp_input.attr.show = temp_input_show; | |
598 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
599 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 600 | if (result) |
31f5396a | 601 | goto free_temp_mem; |
e68b16ab ZR |
602 | |
603 | if (tz->ops->get_crit_temp) { | |
604 | unsigned long temperature; | |
605 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
31f5396a | 606 | snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH, |
e68b16ab | 607 | "temp%d_crit", hwmon->count); |
31f5396a JD |
608 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
609 | temp->temp_crit.attr.attr.mode = 0444; | |
610 | temp->temp_crit.attr.show = temp_crit_show; | |
611 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 612 | result = device_create_file(hwmon->device, |
31f5396a | 613 | &temp->temp_crit.attr); |
e68b16ab | 614 | if (result) |
b299eb5c | 615 | goto unregister_input; |
e68b16ab ZR |
616 | } |
617 | } | |
618 | ||
619 | mutex_lock(&thermal_list_lock); | |
620 | if (new_hwmon_device) | |
621 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 622 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
623 | mutex_unlock(&thermal_list_lock); |
624 | ||
625 | return 0; | |
626 | ||
b299eb5c | 627 | unregister_input: |
31f5396a JD |
628 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
629 | free_temp_mem: | |
630 | kfree(temp); | |
b299eb5c | 631 | unregister_name: |
e68b16ab ZR |
632 | if (new_hwmon_device) { |
633 | device_remove_file(hwmon->device, &dev_attr_name); | |
634 | hwmon_device_unregister(hwmon->device); | |
635 | } | |
636 | free_mem: | |
637 | if (new_hwmon_device) | |
638 | kfree(hwmon); | |
639 | ||
640 | return result; | |
641 | } | |
642 | ||
643 | static void | |
644 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
645 | { | |
31f5396a JD |
646 | struct thermal_hwmon_device *hwmon; |
647 | struct thermal_hwmon_temp *temp; | |
648 | ||
649 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
650 | if (unlikely(!hwmon)) { | |
651 | /* Should never happen... */ | |
652 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
653 | return; | |
654 | } | |
655 | ||
656 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
657 | if (unlikely(!temp)) { | |
658 | /* Should never happen... */ | |
659 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
660 | return; | |
661 | } | |
e68b16ab | 662 | |
31f5396a | 663 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 664 | if (tz->ops->get_crit_temp) |
31f5396a | 665 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
666 | |
667 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
668 | list_del(&temp->hwmon_node); |
669 | kfree(temp); | |
e68b16ab ZR |
670 | if (!list_empty(&hwmon->tz_list)) { |
671 | mutex_unlock(&thermal_list_lock); | |
672 | return; | |
673 | } | |
674 | list_del(&hwmon->node); | |
675 | mutex_unlock(&thermal_list_lock); | |
676 | ||
677 | device_remove_file(hwmon->device, &dev_attr_name); | |
678 | hwmon_device_unregister(hwmon->device); | |
679 | kfree(hwmon); | |
680 | } | |
681 | #else | |
682 | static int | |
683 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
684 | { | |
685 | return 0; | |
686 | } | |
687 | ||
688 | static void | |
689 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
690 | { | |
691 | } | |
692 | #endif | |
693 | ||
b1569e99 MG |
694 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
695 | int delay) | |
696 | { | |
b1569e99 | 697 | if (delay > 1000) |
41f63c53 TH |
698 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, |
699 | round_jiffies(msecs_to_jiffies(delay))); | |
700 | else if (delay) | |
701 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
702 | msecs_to_jiffies(delay)); | |
b1569e99 | 703 | else |
41f63c53 | 704 | cancel_delayed_work(&tz->poll_queue); |
b1569e99 MG |
705 | } |
706 | ||
707 | static void thermal_zone_device_passive(struct thermal_zone_device *tz, | |
708 | int temp, int trip_temp, int trip) | |
709 | { | |
710 | int trend = 0; | |
711 | struct thermal_cooling_device_instance *instance; | |
712 | struct thermal_cooling_device *cdev; | |
713 | long state, max_state; | |
714 | ||
715 | /* | |
716 | * Above Trip? | |
717 | * ----------- | |
718 | * Calculate the thermal trend (using the passive cooling equation) | |
719 | * and modify the performance limit for all passive cooling devices | |
720 | * accordingly. Note that we assume symmetry. | |
721 | */ | |
722 | if (temp >= trip_temp) { | |
723 | tz->passive = true; | |
724 | ||
725 | trend = (tz->tc1 * (temp - tz->last_temperature)) + | |
726 | (tz->tc2 * (temp - trip_temp)); | |
727 | ||
728 | /* Heating up? */ | |
729 | if (trend > 0) { | |
730 | list_for_each_entry(instance, &tz->cooling_devices, | |
731 | node) { | |
732 | if (instance->trip != trip) | |
733 | continue; | |
734 | cdev = instance->cdev; | |
735 | cdev->ops->get_cur_state(cdev, &state); | |
736 | cdev->ops->get_max_state(cdev, &max_state); | |
737 | if (state++ < max_state) | |
738 | cdev->ops->set_cur_state(cdev, state); | |
739 | } | |
740 | } else if (trend < 0) { /* Cooling off? */ | |
741 | list_for_each_entry(instance, &tz->cooling_devices, | |
742 | node) { | |
743 | if (instance->trip != trip) | |
744 | continue; | |
745 | cdev = instance->cdev; | |
746 | cdev->ops->get_cur_state(cdev, &state); | |
747 | cdev->ops->get_max_state(cdev, &max_state); | |
748 | if (state > 0) | |
749 | cdev->ops->set_cur_state(cdev, --state); | |
750 | } | |
751 | } | |
752 | return; | |
753 | } | |
754 | ||
755 | /* | |
756 | * Below Trip? | |
757 | * ----------- | |
758 | * Implement passive cooling hysteresis to slowly increase performance | |
759 | * and avoid thrashing around the passive trip point. Note that we | |
760 | * assume symmetry. | |
761 | */ | |
762 | list_for_each_entry(instance, &tz->cooling_devices, node) { | |
763 | if (instance->trip != trip) | |
764 | continue; | |
765 | cdev = instance->cdev; | |
766 | cdev->ops->get_cur_state(cdev, &state); | |
767 | cdev->ops->get_max_state(cdev, &max_state); | |
768 | if (state > 0) | |
769 | cdev->ops->set_cur_state(cdev, --state); | |
770 | if (state == 0) | |
771 | tz->passive = false; | |
772 | } | |
773 | } | |
774 | ||
775 | static void thermal_zone_device_check(struct work_struct *work) | |
776 | { | |
777 | struct thermal_zone_device *tz = container_of(work, struct | |
778 | thermal_zone_device, | |
779 | poll_queue.work); | |
780 | thermal_zone_device_update(tz); | |
781 | } | |
e68b16ab | 782 | |
203d3d4a ZR |
783 | /** |
784 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
785 | * @tz: thermal zone device |
786 | * @trip: indicates which trip point the cooling devices is | |
787 | * associated with in this thermal zone. | |
788 | * @cdev: thermal cooling device | |
543a9561 LB |
789 | * |
790 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
791 | */ |
792 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
793 | int trip, | |
794 | struct thermal_cooling_device *cdev) | |
795 | { | |
796 | struct thermal_cooling_device_instance *dev; | |
797 | struct thermal_cooling_device_instance *pos; | |
c7516709 TS |
798 | struct thermal_zone_device *pos1; |
799 | struct thermal_cooling_device *pos2; | |
203d3d4a ZR |
800 | int result; |
801 | ||
543a9561 | 802 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
803 | return -EINVAL; |
804 | ||
c7516709 TS |
805 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
806 | if (pos1 == tz) | |
807 | break; | |
808 | } | |
809 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
810 | if (pos2 == cdev) | |
811 | break; | |
812 | } | |
813 | ||
814 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
815 | return -EINVAL; |
816 | ||
817 | dev = | |
818 | kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); | |
819 | if (!dev) | |
820 | return -ENOMEM; | |
821 | dev->tz = tz; | |
822 | dev->cdev = cdev; | |
823 | dev->trip = trip; | |
824 | result = get_idr(&tz->idr, &tz->lock, &dev->id); | |
825 | if (result) | |
826 | goto free_mem; | |
827 | ||
828 | sprintf(dev->name, "cdev%d", dev->id); | |
829 | result = | |
830 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
831 | if (result) | |
832 | goto release_idr; | |
833 | ||
834 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 835 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
836 | dev->attr.attr.name = dev->attr_name; |
837 | dev->attr.attr.mode = 0444; | |
838 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
839 | result = device_create_file(&tz->device, &dev->attr); | |
840 | if (result) | |
841 | goto remove_symbol_link; | |
842 | ||
843 | mutex_lock(&tz->lock); | |
844 | list_for_each_entry(pos, &tz->cooling_devices, node) | |
845 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
846 | result = -EEXIST; | |
847 | break; | |
848 | } | |
849 | if (!result) | |
850 | list_add_tail(&dev->node, &tz->cooling_devices); | |
851 | mutex_unlock(&tz->lock); | |
852 | ||
853 | if (!result) | |
854 | return 0; | |
855 | ||
856 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 857 | remove_symbol_link: |
203d3d4a | 858 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 859 | release_idr: |
203d3d4a | 860 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 861 | free_mem: |
203d3d4a ZR |
862 | kfree(dev); |
863 | return result; | |
864 | } | |
865 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); | |
866 | ||
867 | /** | |
868 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
869 | * @tz: thermal zone device |
870 | * @trip: indicates which trip point the cooling devices is | |
871 | * associated with in this thermal zone. | |
872 | * @cdev: thermal cooling device | |
543a9561 LB |
873 | * |
874 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
875 | */ |
876 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
877 | int trip, | |
878 | struct thermal_cooling_device *cdev) | |
879 | { | |
880 | struct thermal_cooling_device_instance *pos, *next; | |
881 | ||
882 | mutex_lock(&tz->lock); | |
883 | list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) { | |
543a9561 | 884 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
203d3d4a ZR |
885 | list_del(&pos->node); |
886 | mutex_unlock(&tz->lock); | |
887 | goto unbind; | |
888 | } | |
889 | } | |
890 | mutex_unlock(&tz->lock); | |
891 | ||
892 | return -ENODEV; | |
893 | ||
caca8b80 | 894 | unbind: |
203d3d4a ZR |
895 | device_remove_file(&tz->device, &pos->attr); |
896 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
897 | release_idr(&tz->idr, &tz->lock, pos->id); | |
898 | kfree(pos); | |
899 | return 0; | |
900 | } | |
901 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); | |
902 | ||
903 | static void thermal_release(struct device *dev) | |
904 | { | |
905 | struct thermal_zone_device *tz; | |
906 | struct thermal_cooling_device *cdev; | |
907 | ||
caca8b80 JP |
908 | if (!strncmp(dev_name(dev), "thermal_zone", |
909 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
910 | tz = to_thermal_zone(dev); |
911 | kfree(tz); | |
912 | } else { | |
913 | cdev = to_cooling_device(dev); | |
914 | kfree(cdev); | |
915 | } | |
916 | } | |
917 | ||
918 | static struct class thermal_class = { | |
919 | .name = "thermal", | |
920 | .dev_release = thermal_release, | |
921 | }; | |
922 | ||
923 | /** | |
924 | * thermal_cooling_device_register - register a new thermal cooling device | |
925 | * @type: the thermal cooling device type. | |
926 | * @devdata: device private data. | |
927 | * @ops: standard thermal cooling devices callbacks. | |
928 | */ | |
caca8b80 JP |
929 | struct thermal_cooling_device * |
930 | thermal_cooling_device_register(char *type, void *devdata, | |
931 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
932 | { |
933 | struct thermal_cooling_device *cdev; | |
934 | struct thermal_zone_device *pos; | |
935 | int result; | |
936 | ||
937 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 938 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
939 | |
940 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 941 | !ops->set_cur_state) |
3e6fda5c | 942 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
943 | |
944 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
945 | if (!cdev) | |
3e6fda5c | 946 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
947 | |
948 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
949 | if (result) { | |
950 | kfree(cdev); | |
3e6fda5c | 951 | return ERR_PTR(result); |
203d3d4a ZR |
952 | } |
953 | ||
954 | strcpy(cdev->type, type); | |
955 | cdev->ops = ops; | |
956 | cdev->device.class = &thermal_class; | |
957 | cdev->devdata = devdata; | |
354655ea | 958 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
959 | result = device_register(&cdev->device); |
960 | if (result) { | |
961 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
962 | kfree(cdev); | |
3e6fda5c | 963 | return ERR_PTR(result); |
203d3d4a ZR |
964 | } |
965 | ||
966 | /* sys I/F */ | |
967 | if (type) { | |
543a9561 | 968 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
969 | if (result) |
970 | goto unregister; | |
971 | } | |
972 | ||
973 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
974 | if (result) | |
975 | goto unregister; | |
976 | ||
977 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
978 | if (result) | |
979 | goto unregister; | |
980 | ||
981 | mutex_lock(&thermal_list_lock); | |
982 | list_add(&cdev->node, &thermal_cdev_list); | |
983 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
984 | if (!pos->ops->bind) | |
985 | continue; | |
986 | result = pos->ops->bind(pos, cdev); | |
987 | if (result) | |
988 | break; | |
989 | ||
990 | } | |
991 | mutex_unlock(&thermal_list_lock); | |
992 | ||
993 | if (!result) | |
994 | return cdev; | |
995 | ||
caca8b80 | 996 | unregister: |
203d3d4a ZR |
997 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
998 | device_unregister(&cdev->device); | |
3e6fda5c | 999 | return ERR_PTR(result); |
203d3d4a ZR |
1000 | } |
1001 | EXPORT_SYMBOL(thermal_cooling_device_register); | |
1002 | ||
1003 | /** | |
1004 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1005 | * @cdev: the thermal cooling device to remove. |
1006 | * | |
1007 | * thermal_cooling_device_unregister() must be called when the device is no | |
1008 | * longer needed. | |
1009 | */ | |
1010 | void thermal_cooling_device_unregister(struct | |
1011 | thermal_cooling_device | |
1012 | *cdev) | |
1013 | { | |
1014 | struct thermal_zone_device *tz; | |
1015 | struct thermal_cooling_device *pos = NULL; | |
1016 | ||
1017 | if (!cdev) | |
1018 | return; | |
1019 | ||
1020 | mutex_lock(&thermal_list_lock); | |
1021 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1022 | if (pos == cdev) | |
1023 | break; | |
1024 | if (pos != cdev) { | |
1025 | /* thermal cooling device not found */ | |
1026 | mutex_unlock(&thermal_list_lock); | |
1027 | return; | |
1028 | } | |
1029 | list_del(&cdev->node); | |
1030 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1031 | if (!tz->ops->unbind) | |
1032 | continue; | |
1033 | tz->ops->unbind(tz, cdev); | |
1034 | } | |
1035 | mutex_unlock(&thermal_list_lock); | |
1036 | if (cdev->type[0]) | |
543a9561 | 1037 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1038 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1039 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1040 | ||
1041 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1042 | device_unregister(&cdev->device); | |
1043 | return; | |
1044 | } | |
1045 | EXPORT_SYMBOL(thermal_cooling_device_unregister); | |
1046 | ||
b1569e99 MG |
1047 | /** |
1048 | * thermal_zone_device_update - force an update of a thermal zone's state | |
1049 | * @ttz: the thermal zone to update | |
1050 | */ | |
1051 | ||
1052 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
1053 | { | |
1054 | int count, ret = 0; | |
1055 | long temp, trip_temp; | |
1056 | enum thermal_trip_type trip_type; | |
1057 | struct thermal_cooling_device_instance *instance; | |
1058 | struct thermal_cooling_device *cdev; | |
1059 | ||
1060 | mutex_lock(&tz->lock); | |
1061 | ||
0d288162 MB |
1062 | if (tz->ops->get_temp(tz, &temp)) { |
1063 | /* get_temp failed - retry it later */ | |
c5a01dd5 | 1064 | pr_warn("failed to read out thermal zone %d\n", tz->id); |
0d288162 MB |
1065 | goto leave; |
1066 | } | |
b1569e99 MG |
1067 | |
1068 | for (count = 0; count < tz->trips; count++) { | |
1069 | tz->ops->get_trip_type(tz, count, &trip_type); | |
1070 | tz->ops->get_trip_temp(tz, count, &trip_temp); | |
1071 | ||
1072 | switch (trip_type) { | |
1073 | case THERMAL_TRIP_CRITICAL: | |
29321357 | 1074 | if (temp >= trip_temp) { |
b1569e99 MG |
1075 | if (tz->ops->notify) |
1076 | ret = tz->ops->notify(tz, count, | |
1077 | trip_type); | |
1078 | if (!ret) { | |
c5a01dd5 JP |
1079 | pr_emerg("Critical temperature reached (%ld C), shutting down\n", |
1080 | temp/1000); | |
b1569e99 MG |
1081 | orderly_poweroff(true); |
1082 | } | |
1083 | } | |
1084 | break; | |
1085 | case THERMAL_TRIP_HOT: | |
29321357 | 1086 | if (temp >= trip_temp) |
b1569e99 MG |
1087 | if (tz->ops->notify) |
1088 | tz->ops->notify(tz, count, trip_type); | |
1089 | break; | |
1090 | case THERMAL_TRIP_ACTIVE: | |
1091 | list_for_each_entry(instance, &tz->cooling_devices, | |
1092 | node) { | |
1093 | if (instance->trip != count) | |
1094 | continue; | |
1095 | ||
1096 | cdev = instance->cdev; | |
1097 | ||
29321357 | 1098 | if (temp >= trip_temp) |
b1569e99 MG |
1099 | cdev->ops->set_cur_state(cdev, 1); |
1100 | else | |
1101 | cdev->ops->set_cur_state(cdev, 0); | |
1102 | } | |
1103 | break; | |
1104 | case THERMAL_TRIP_PASSIVE: | |
29321357 | 1105 | if (temp >= trip_temp || tz->passive) |
b1569e99 MG |
1106 | thermal_zone_device_passive(tz, temp, |
1107 | trip_temp, count); | |
1108 | break; | |
1109 | } | |
1110 | } | |
03a971a2 MG |
1111 | |
1112 | if (tz->forced_passive) | |
1113 | thermal_zone_device_passive(tz, temp, tz->forced_passive, | |
1114 | THERMAL_TRIPS_NONE); | |
1115 | ||
b1569e99 | 1116 | tz->last_temperature = temp; |
0d288162 | 1117 | |
caca8b80 | 1118 | leave: |
b1569e99 MG |
1119 | if (tz->passive) |
1120 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
1121 | else if (tz->polling_delay) | |
1122 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
3767cb54 FP |
1123 | else |
1124 | thermal_zone_device_set_polling(tz, 0); | |
b1569e99 MG |
1125 | mutex_unlock(&tz->lock); |
1126 | } | |
1127 | EXPORT_SYMBOL(thermal_zone_device_update); | |
1128 | ||
c56f5c03 D |
1129 | /** |
1130 | * create_trip_attrs - create attributes for trip points | |
1131 | * @tz: the thermal zone device | |
1132 | * @mask: Writeable trip point bitmap. | |
1133 | */ | |
1134 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1135 | { | |
1136 | int indx; | |
27365a6c | 1137 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1138 | |
27365a6c | 1139 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1140 | if (!tz->trip_type_attrs) |
1141 | return -ENOMEM; | |
1142 | ||
27365a6c | 1143 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1144 | if (!tz->trip_temp_attrs) { |
1145 | kfree(tz->trip_type_attrs); | |
1146 | return -ENOMEM; | |
1147 | } | |
1148 | ||
27365a6c D |
1149 | if (tz->ops->get_trip_hyst) { |
1150 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1151 | if (!tz->trip_hyst_attrs) { | |
1152 | kfree(tz->trip_type_attrs); | |
1153 | kfree(tz->trip_temp_attrs); | |
1154 | return -ENOMEM; | |
1155 | } | |
1156 | } | |
c56f5c03 | 1157 | |
27365a6c D |
1158 | |
1159 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1160 | /* create trip type attribute */ |
1161 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1162 | "trip_point_%d_type", indx); | |
1163 | ||
1164 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1165 | tz->trip_type_attrs[indx].attr.attr.name = | |
1166 | tz->trip_type_attrs[indx].name; | |
1167 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1168 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1169 | ||
1170 | device_create_file(&tz->device, | |
1171 | &tz->trip_type_attrs[indx].attr); | |
1172 | ||
1173 | /* create trip temp attribute */ | |
1174 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1175 | "trip_point_%d_temp", indx); | |
1176 | ||
1177 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1178 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1179 | tz->trip_temp_attrs[indx].name; | |
1180 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1181 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1182 | if (mask & (1 << indx)) { | |
1183 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1184 | tz->trip_temp_attrs[indx].attr.store = | |
1185 | trip_point_temp_store; | |
1186 | } | |
1187 | ||
1188 | device_create_file(&tz->device, | |
1189 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1190 | |
1191 | /* create Optional trip hyst attribute */ | |
1192 | if (!tz->ops->get_trip_hyst) | |
1193 | continue; | |
1194 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1195 | "trip_point_%d_hyst", indx); | |
1196 | ||
1197 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1198 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1199 | tz->trip_hyst_attrs[indx].name; | |
1200 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1201 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1202 | if (tz->ops->set_trip_hyst) { | |
1203 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1204 | tz->trip_hyst_attrs[indx].attr.store = | |
1205 | trip_point_hyst_store; | |
1206 | } | |
1207 | ||
1208 | device_create_file(&tz->device, | |
1209 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1210 | } |
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1215 | { | |
1216 | int indx; | |
1217 | ||
1218 | for (indx = 0; indx < tz->trips; indx++) { | |
1219 | device_remove_file(&tz->device, | |
1220 | &tz->trip_type_attrs[indx].attr); | |
1221 | device_remove_file(&tz->device, | |
1222 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1223 | if (tz->ops->get_trip_hyst) |
1224 | device_remove_file(&tz->device, | |
1225 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1226 | } |
1227 | kfree(tz->trip_type_attrs); | |
1228 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1229 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1230 | } |
1231 | ||
203d3d4a ZR |
1232 | /** |
1233 | * thermal_zone_device_register - register a new thermal zone device | |
1234 | * @type: the thermal zone device type | |
1235 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1236 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1237 | * @devdata: private device data |
1238 | * @ops: standard thermal zone device callbacks | |
b1569e99 MG |
1239 | * @tc1: thermal coefficient 1 for passive calculations |
1240 | * @tc2: thermal coefficient 2 for passive calculations | |
1241 | * @passive_delay: number of milliseconds to wait between polls when | |
1242 | * performing passive cooling | |
1243 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1244 | * whether trip points have been crossed (0 for interrupt | |
1245 | * driven systems) | |
203d3d4a ZR |
1246 | * |
1247 | * thermal_zone_device_unregister() must be called when the device is no | |
b1569e99 MG |
1248 | * longer needed. The passive cooling formula uses tc1 and tc2 as described in |
1249 | * section 11.1.5.1 of the ACPI specification 3.0. | |
203d3d4a | 1250 | */ |
4b1bf587 | 1251 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1252 | int trips, int mask, void *devdata, |
5b275ce2 AC |
1253 | const struct thermal_zone_device_ops *ops, |
1254 | int tc1, int tc2, int passive_delay, int polling_delay) | |
203d3d4a ZR |
1255 | { |
1256 | struct thermal_zone_device *tz; | |
1257 | struct thermal_cooling_device *pos; | |
03a971a2 | 1258 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1259 | int result; |
1260 | int count; | |
03a971a2 | 1261 | int passive = 0; |
203d3d4a ZR |
1262 | |
1263 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 1264 | return ERR_PTR(-EINVAL); |
203d3d4a | 1265 | |
c56f5c03 | 1266 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1267 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1268 | |
1269 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1270 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1271 | |
1272 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); | |
1273 | if (!tz) | |
3e6fda5c | 1274 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1275 | |
1276 | INIT_LIST_HEAD(&tz->cooling_devices); | |
1277 | idr_init(&tz->idr); | |
1278 | mutex_init(&tz->lock); | |
1279 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1280 | if (result) { | |
1281 | kfree(tz); | |
3e6fda5c | 1282 | return ERR_PTR(result); |
203d3d4a ZR |
1283 | } |
1284 | ||
1285 | strcpy(tz->type, type); | |
1286 | tz->ops = ops; | |
1287 | tz->device.class = &thermal_class; | |
1288 | tz->devdata = devdata; | |
1289 | tz->trips = trips; | |
b1569e99 MG |
1290 | tz->tc1 = tc1; |
1291 | tz->tc2 = tc2; | |
1292 | tz->passive_delay = passive_delay; | |
1293 | tz->polling_delay = polling_delay; | |
1294 | ||
354655ea | 1295 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1296 | result = device_register(&tz->device); |
1297 | if (result) { | |
1298 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1299 | kfree(tz); | |
3e6fda5c | 1300 | return ERR_PTR(result); |
203d3d4a ZR |
1301 | } |
1302 | ||
1303 | /* sys I/F */ | |
1304 | if (type) { | |
1305 | result = device_create_file(&tz->device, &dev_attr_type); | |
1306 | if (result) | |
1307 | goto unregister; | |
1308 | } | |
1309 | ||
1310 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1311 | if (result) | |
1312 | goto unregister; | |
1313 | ||
1314 | if (ops->get_mode) { | |
1315 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1316 | if (result) | |
1317 | goto unregister; | |
1318 | } | |
1319 | ||
c56f5c03 D |
1320 | result = create_trip_attrs(tz, mask); |
1321 | if (result) | |
1322 | goto unregister; | |
1323 | ||
203d3d4a | 1324 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1325 | tz->ops->get_trip_type(tz, count, &trip_type); |
1326 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1327 | passive = 1; | |
203d3d4a ZR |
1328 | } |
1329 | ||
03a971a2 MG |
1330 | if (!passive) |
1331 | result = device_create_file(&tz->device, | |
1332 | &dev_attr_passive); | |
1333 | ||
1334 | if (result) | |
1335 | goto unregister; | |
1336 | ||
e68b16ab ZR |
1337 | result = thermal_add_hwmon_sysfs(tz); |
1338 | if (result) | |
1339 | goto unregister; | |
1340 | ||
203d3d4a ZR |
1341 | mutex_lock(&thermal_list_lock); |
1342 | list_add_tail(&tz->node, &thermal_tz_list); | |
1343 | if (ops->bind) | |
1344 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
543a9561 LB |
1345 | result = ops->bind(tz, pos); |
1346 | if (result) | |
1347 | break; | |
203d3d4a ZR |
1348 | } |
1349 | mutex_unlock(&thermal_list_lock); | |
1350 | ||
b1569e99 MG |
1351 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1352 | ||
1353 | thermal_zone_device_update(tz); | |
1354 | ||
203d3d4a ZR |
1355 | if (!result) |
1356 | return tz; | |
1357 | ||
caca8b80 | 1358 | unregister: |
203d3d4a ZR |
1359 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1360 | device_unregister(&tz->device); | |
3e6fda5c | 1361 | return ERR_PTR(result); |
203d3d4a ZR |
1362 | } |
1363 | EXPORT_SYMBOL(thermal_zone_device_register); | |
1364 | ||
1365 | /** | |
1366 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1367 | * @tz: the thermal zone device to remove |
1368 | */ | |
1369 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1370 | { | |
1371 | struct thermal_cooling_device *cdev; | |
1372 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1373 | |
1374 | if (!tz) | |
1375 | return; | |
1376 | ||
1377 | mutex_lock(&thermal_list_lock); | |
1378 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1379 | if (pos == tz) | |
1380 | break; | |
1381 | if (pos != tz) { | |
1382 | /* thermal zone device not found */ | |
1383 | mutex_unlock(&thermal_list_lock); | |
1384 | return; | |
1385 | } | |
1386 | list_del(&tz->node); | |
1387 | if (tz->ops->unbind) | |
1388 | list_for_each_entry(cdev, &thermal_cdev_list, node) | |
1389 | tz->ops->unbind(tz, cdev); | |
1390 | mutex_unlock(&thermal_list_lock); | |
1391 | ||
b1569e99 MG |
1392 | thermal_zone_device_set_polling(tz, 0); |
1393 | ||
203d3d4a ZR |
1394 | if (tz->type[0]) |
1395 | device_remove_file(&tz->device, &dev_attr_type); | |
1396 | device_remove_file(&tz->device, &dev_attr_temp); | |
1397 | if (tz->ops->get_mode) | |
1398 | device_remove_file(&tz->device, &dev_attr_mode); | |
c56f5c03 | 1399 | remove_trip_attrs(tz); |
203d3d4a | 1400 | |
e68b16ab | 1401 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1402 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1403 | idr_destroy(&tz->idr); | |
1404 | mutex_destroy(&tz->lock); | |
1405 | device_unregister(&tz->device); | |
1406 | return; | |
1407 | } | |
1408 | EXPORT_SYMBOL(thermal_zone_device_unregister); | |
1409 | ||
af06216a RW |
1410 | #ifdef CONFIG_NET |
1411 | static struct genl_family thermal_event_genl_family = { | |
1412 | .id = GENL_ID_GENERATE, | |
1413 | .name = THERMAL_GENL_FAMILY_NAME, | |
1414 | .version = THERMAL_GENL_VERSION, | |
1415 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1416 | }; | |
1417 | ||
1418 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1419 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1420 | }; | |
1421 | ||
2d58d7ea | 1422 | int thermal_generate_netlink_event(u32 orig, enum events event) |
4cb18728 D |
1423 | { |
1424 | struct sk_buff *skb; | |
1425 | struct nlattr *attr; | |
1426 | struct thermal_genl_event *thermal_event; | |
1427 | void *msg_header; | |
1428 | int size; | |
1429 | int result; | |
b11de07c | 1430 | static unsigned int thermal_event_seqnum; |
4cb18728 D |
1431 | |
1432 | /* allocate memory */ | |
886ee546 JP |
1433 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1434 | nla_total_size(0); | |
4cb18728 D |
1435 | |
1436 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1437 | if (!skb) | |
1438 | return -ENOMEM; | |
1439 | ||
1440 | /* add the genetlink message header */ | |
1441 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1442 | &thermal_event_genl_family, 0, | |
1443 | THERMAL_GENL_CMD_EVENT); | |
1444 | if (!msg_header) { | |
1445 | nlmsg_free(skb); | |
1446 | return -ENOMEM; | |
1447 | } | |
1448 | ||
1449 | /* fill the data */ | |
886ee546 JP |
1450 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1451 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1452 | |
1453 | if (!attr) { | |
1454 | nlmsg_free(skb); | |
1455 | return -EINVAL; | |
1456 | } | |
1457 | ||
1458 | thermal_event = nla_data(attr); | |
1459 | if (!thermal_event) { | |
1460 | nlmsg_free(skb); | |
1461 | return -EINVAL; | |
1462 | } | |
1463 | ||
1464 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1465 | ||
1466 | thermal_event->orig = orig; | |
1467 | thermal_event->event = event; | |
1468 | ||
1469 | /* send multicast genetlink message */ | |
1470 | result = genlmsg_end(skb, msg_header); | |
1471 | if (result < 0) { | |
1472 | nlmsg_free(skb); | |
1473 | return result; | |
1474 | } | |
1475 | ||
1476 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1477 | if (result) | |
c5a01dd5 | 1478 | pr_info("failed to send netlink event:%d\n", result); |
4cb18728 D |
1479 | |
1480 | return result; | |
1481 | } | |
2d58d7ea | 1482 | EXPORT_SYMBOL(thermal_generate_netlink_event); |
4cb18728 D |
1483 | |
1484 | static int genetlink_init(void) | |
1485 | { | |
1486 | int result; | |
1487 | ||
1488 | result = genl_register_family(&thermal_event_genl_family); | |
1489 | if (result) | |
1490 | return result; | |
1491 | ||
1492 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1493 | &thermal_event_mcgrp); | |
1494 | if (result) | |
1495 | genl_unregister_family(&thermal_event_genl_family); | |
1496 | return result; | |
1497 | } | |
1498 | ||
af06216a RW |
1499 | static void genetlink_exit(void) |
1500 | { | |
1501 | genl_unregister_family(&thermal_event_genl_family); | |
1502 | } | |
1503 | #else /* !CONFIG_NET */ | |
1504 | static inline int genetlink_init(void) { return 0; } | |
1505 | static inline void genetlink_exit(void) {} | |
1506 | #endif /* !CONFIG_NET */ | |
1507 | ||
203d3d4a ZR |
1508 | static int __init thermal_init(void) |
1509 | { | |
1510 | int result = 0; | |
1511 | ||
1512 | result = class_register(&thermal_class); | |
1513 | if (result) { | |
1514 | idr_destroy(&thermal_tz_idr); | |
1515 | idr_destroy(&thermal_cdev_idr); | |
1516 | mutex_destroy(&thermal_idr_lock); | |
1517 | mutex_destroy(&thermal_list_lock); | |
1518 | } | |
4cb18728 | 1519 | result = genetlink_init(); |
203d3d4a ZR |
1520 | return result; |
1521 | } | |
1522 | ||
1523 | static void __exit thermal_exit(void) | |
1524 | { | |
1525 | class_unregister(&thermal_class); | |
1526 | idr_destroy(&thermal_tz_idr); | |
1527 | idr_destroy(&thermal_cdev_idr); | |
1528 | mutex_destroy(&thermal_idr_lock); | |
1529 | mutex_destroy(&thermal_list_lock); | |
4cb18728 | 1530 | genetlink_exit(); |
203d3d4a ZR |
1531 | } |
1532 | ||
4cb18728 | 1533 | fs_initcall(thermal_init); |
203d3d4a | 1534 | module_exit(thermal_exit); |