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 | ||
81 | *id = *id & MAX_ID_MASK; | |
82 | return 0; | |
83 | } | |
84 | ||
85 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
86 | { | |
87 | if (lock) | |
88 | mutex_lock(lock); | |
89 | idr_remove(idr, id); | |
90 | if (lock) | |
91 | mutex_unlock(lock); | |
92 | } | |
93 | ||
94 | /* sys I/F for thermal zone */ | |
95 | ||
96 | #define to_thermal_zone(_dev) \ | |
97 | container_of(_dev, struct thermal_zone_device, device) | |
98 | ||
99 | static ssize_t | |
100 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
101 | { | |
102 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
103 | ||
104 | return sprintf(buf, "%s\n", tz->type); | |
105 | } | |
106 | ||
107 | static ssize_t | |
108 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
109 | { | |
110 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
111 | long temperature; |
112 | int ret; | |
203d3d4a ZR |
113 | |
114 | if (!tz->ops->get_temp) | |
115 | return -EPERM; | |
116 | ||
6503e5df MG |
117 | ret = tz->ops->get_temp(tz, &temperature); |
118 | ||
119 | if (ret) | |
120 | return ret; | |
121 | ||
122 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
123 | } |
124 | ||
125 | static ssize_t | |
126 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
127 | { | |
128 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
129 | enum thermal_device_mode mode; |
130 | int result; | |
203d3d4a ZR |
131 | |
132 | if (!tz->ops->get_mode) | |
133 | return -EPERM; | |
134 | ||
6503e5df MG |
135 | result = tz->ops->get_mode(tz, &mode); |
136 | if (result) | |
137 | return result; | |
138 | ||
139 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
140 | : "disabled"); | |
203d3d4a ZR |
141 | } |
142 | ||
143 | static ssize_t | |
144 | mode_store(struct device *dev, struct device_attribute *attr, | |
145 | const char *buf, size_t count) | |
146 | { | |
147 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
148 | int result; | |
149 | ||
150 | if (!tz->ops->set_mode) | |
151 | return -EPERM; | |
152 | ||
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 | { | |
697 | cancel_delayed_work(&(tz->poll_queue)); | |
698 | ||
699 | if (!delay) | |
700 | return; | |
701 | ||
702 | if (delay > 1000) | |
51e20d0e | 703 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
704 | round_jiffies(msecs_to_jiffies(delay))); |
705 | else | |
51e20d0e | 706 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
707 | msecs_to_jiffies(delay)); |
708 | } | |
709 | ||
710 | static void thermal_zone_device_passive(struct thermal_zone_device *tz, | |
711 | int temp, int trip_temp, int trip) | |
712 | { | |
713 | int trend = 0; | |
714 | struct thermal_cooling_device_instance *instance; | |
715 | struct thermal_cooling_device *cdev; | |
716 | long state, max_state; | |
717 | ||
718 | /* | |
719 | * Above Trip? | |
720 | * ----------- | |
721 | * Calculate the thermal trend (using the passive cooling equation) | |
722 | * and modify the performance limit for all passive cooling devices | |
723 | * accordingly. Note that we assume symmetry. | |
724 | */ | |
725 | if (temp >= trip_temp) { | |
726 | tz->passive = true; | |
727 | ||
728 | trend = (tz->tc1 * (temp - tz->last_temperature)) + | |
729 | (tz->tc2 * (temp - trip_temp)); | |
730 | ||
731 | /* Heating up? */ | |
732 | if (trend > 0) { | |
733 | list_for_each_entry(instance, &tz->cooling_devices, | |
734 | node) { | |
735 | if (instance->trip != trip) | |
736 | continue; | |
737 | cdev = instance->cdev; | |
738 | cdev->ops->get_cur_state(cdev, &state); | |
739 | cdev->ops->get_max_state(cdev, &max_state); | |
740 | if (state++ < max_state) | |
741 | cdev->ops->set_cur_state(cdev, state); | |
742 | } | |
743 | } else if (trend < 0) { /* Cooling off? */ | |
744 | list_for_each_entry(instance, &tz->cooling_devices, | |
745 | node) { | |
746 | if (instance->trip != trip) | |
747 | continue; | |
748 | cdev = instance->cdev; | |
749 | cdev->ops->get_cur_state(cdev, &state); | |
750 | cdev->ops->get_max_state(cdev, &max_state); | |
751 | if (state > 0) | |
752 | cdev->ops->set_cur_state(cdev, --state); | |
753 | } | |
754 | } | |
755 | return; | |
756 | } | |
757 | ||
758 | /* | |
759 | * Below Trip? | |
760 | * ----------- | |
761 | * Implement passive cooling hysteresis to slowly increase performance | |
762 | * and avoid thrashing around the passive trip point. Note that we | |
763 | * assume symmetry. | |
764 | */ | |
765 | list_for_each_entry(instance, &tz->cooling_devices, node) { | |
766 | if (instance->trip != trip) | |
767 | continue; | |
768 | cdev = instance->cdev; | |
769 | cdev->ops->get_cur_state(cdev, &state); | |
770 | cdev->ops->get_max_state(cdev, &max_state); | |
771 | if (state > 0) | |
772 | cdev->ops->set_cur_state(cdev, --state); | |
773 | if (state == 0) | |
774 | tz->passive = false; | |
775 | } | |
776 | } | |
777 | ||
778 | static void thermal_zone_device_check(struct work_struct *work) | |
779 | { | |
780 | struct thermal_zone_device *tz = container_of(work, struct | |
781 | thermal_zone_device, | |
782 | poll_queue.work); | |
783 | thermal_zone_device_update(tz); | |
784 | } | |
e68b16ab | 785 | |
203d3d4a ZR |
786 | /** |
787 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
788 | * @tz: thermal zone device |
789 | * @trip: indicates which trip point the cooling devices is | |
790 | * associated with in this thermal zone. | |
791 | * @cdev: thermal cooling device | |
543a9561 LB |
792 | * |
793 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
794 | */ |
795 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
796 | int trip, | |
797 | struct thermal_cooling_device *cdev) | |
798 | { | |
799 | struct thermal_cooling_device_instance *dev; | |
800 | struct thermal_cooling_device_instance *pos; | |
c7516709 TS |
801 | struct thermal_zone_device *pos1; |
802 | struct thermal_cooling_device *pos2; | |
203d3d4a ZR |
803 | int result; |
804 | ||
543a9561 | 805 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
806 | return -EINVAL; |
807 | ||
c7516709 TS |
808 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
809 | if (pos1 == tz) | |
810 | break; | |
811 | } | |
812 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
813 | if (pos2 == cdev) | |
814 | break; | |
815 | } | |
816 | ||
817 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
818 | return -EINVAL; |
819 | ||
820 | dev = | |
821 | kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); | |
822 | if (!dev) | |
823 | return -ENOMEM; | |
824 | dev->tz = tz; | |
825 | dev->cdev = cdev; | |
826 | dev->trip = trip; | |
827 | result = get_idr(&tz->idr, &tz->lock, &dev->id); | |
828 | if (result) | |
829 | goto free_mem; | |
830 | ||
831 | sprintf(dev->name, "cdev%d", dev->id); | |
832 | result = | |
833 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
834 | if (result) | |
835 | goto release_idr; | |
836 | ||
837 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 838 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
839 | dev->attr.attr.name = dev->attr_name; |
840 | dev->attr.attr.mode = 0444; | |
841 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
842 | result = device_create_file(&tz->device, &dev->attr); | |
843 | if (result) | |
844 | goto remove_symbol_link; | |
845 | ||
846 | mutex_lock(&tz->lock); | |
847 | list_for_each_entry(pos, &tz->cooling_devices, node) | |
848 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
849 | result = -EEXIST; | |
850 | break; | |
851 | } | |
852 | if (!result) | |
853 | list_add_tail(&dev->node, &tz->cooling_devices); | |
854 | mutex_unlock(&tz->lock); | |
855 | ||
856 | if (!result) | |
857 | return 0; | |
858 | ||
859 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 860 | remove_symbol_link: |
203d3d4a | 861 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 862 | release_idr: |
203d3d4a | 863 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 864 | free_mem: |
203d3d4a ZR |
865 | kfree(dev); |
866 | return result; | |
867 | } | |
868 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); | |
869 | ||
870 | /** | |
871 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
872 | * @tz: thermal zone device |
873 | * @trip: indicates which trip point the cooling devices is | |
874 | * associated with in this thermal zone. | |
875 | * @cdev: thermal cooling device | |
543a9561 LB |
876 | * |
877 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
878 | */ |
879 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
880 | int trip, | |
881 | struct thermal_cooling_device *cdev) | |
882 | { | |
883 | struct thermal_cooling_device_instance *pos, *next; | |
884 | ||
885 | mutex_lock(&tz->lock); | |
886 | list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) { | |
543a9561 | 887 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
203d3d4a ZR |
888 | list_del(&pos->node); |
889 | mutex_unlock(&tz->lock); | |
890 | goto unbind; | |
891 | } | |
892 | } | |
893 | mutex_unlock(&tz->lock); | |
894 | ||
895 | return -ENODEV; | |
896 | ||
caca8b80 | 897 | unbind: |
203d3d4a ZR |
898 | device_remove_file(&tz->device, &pos->attr); |
899 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
900 | release_idr(&tz->idr, &tz->lock, pos->id); | |
901 | kfree(pos); | |
902 | return 0; | |
903 | } | |
904 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); | |
905 | ||
906 | static void thermal_release(struct device *dev) | |
907 | { | |
908 | struct thermal_zone_device *tz; | |
909 | struct thermal_cooling_device *cdev; | |
910 | ||
caca8b80 JP |
911 | if (!strncmp(dev_name(dev), "thermal_zone", |
912 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
913 | tz = to_thermal_zone(dev); |
914 | kfree(tz); | |
915 | } else { | |
916 | cdev = to_cooling_device(dev); | |
917 | kfree(cdev); | |
918 | } | |
919 | } | |
920 | ||
921 | static struct class thermal_class = { | |
922 | .name = "thermal", | |
923 | .dev_release = thermal_release, | |
924 | }; | |
925 | ||
926 | /** | |
927 | * thermal_cooling_device_register - register a new thermal cooling device | |
928 | * @type: the thermal cooling device type. | |
929 | * @devdata: device private data. | |
930 | * @ops: standard thermal cooling devices callbacks. | |
931 | */ | |
caca8b80 JP |
932 | struct thermal_cooling_device * |
933 | thermal_cooling_device_register(char *type, void *devdata, | |
934 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
935 | { |
936 | struct thermal_cooling_device *cdev; | |
937 | struct thermal_zone_device *pos; | |
938 | int result; | |
939 | ||
940 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 941 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
942 | |
943 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 944 | !ops->set_cur_state) |
3e6fda5c | 945 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
946 | |
947 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
948 | if (!cdev) | |
3e6fda5c | 949 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
950 | |
951 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
952 | if (result) { | |
953 | kfree(cdev); | |
3e6fda5c | 954 | return ERR_PTR(result); |
203d3d4a ZR |
955 | } |
956 | ||
957 | strcpy(cdev->type, type); | |
958 | cdev->ops = ops; | |
959 | cdev->device.class = &thermal_class; | |
960 | cdev->devdata = devdata; | |
354655ea | 961 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
962 | result = device_register(&cdev->device); |
963 | if (result) { | |
964 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
965 | kfree(cdev); | |
3e6fda5c | 966 | return ERR_PTR(result); |
203d3d4a ZR |
967 | } |
968 | ||
969 | /* sys I/F */ | |
970 | if (type) { | |
543a9561 | 971 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
972 | if (result) |
973 | goto unregister; | |
974 | } | |
975 | ||
976 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
977 | if (result) | |
978 | goto unregister; | |
979 | ||
980 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
981 | if (result) | |
982 | goto unregister; | |
983 | ||
984 | mutex_lock(&thermal_list_lock); | |
985 | list_add(&cdev->node, &thermal_cdev_list); | |
986 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
987 | if (!pos->ops->bind) | |
988 | continue; | |
989 | result = pos->ops->bind(pos, cdev); | |
990 | if (result) | |
991 | break; | |
992 | ||
993 | } | |
994 | mutex_unlock(&thermal_list_lock); | |
995 | ||
996 | if (!result) | |
997 | return cdev; | |
998 | ||
caca8b80 | 999 | unregister: |
203d3d4a ZR |
1000 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1001 | device_unregister(&cdev->device); | |
3e6fda5c | 1002 | return ERR_PTR(result); |
203d3d4a ZR |
1003 | } |
1004 | EXPORT_SYMBOL(thermal_cooling_device_register); | |
1005 | ||
1006 | /** | |
1007 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1008 | * @cdev: the thermal cooling device to remove. |
1009 | * | |
1010 | * thermal_cooling_device_unregister() must be called when the device is no | |
1011 | * longer needed. | |
1012 | */ | |
1013 | void thermal_cooling_device_unregister(struct | |
1014 | thermal_cooling_device | |
1015 | *cdev) | |
1016 | { | |
1017 | struct thermal_zone_device *tz; | |
1018 | struct thermal_cooling_device *pos = NULL; | |
1019 | ||
1020 | if (!cdev) | |
1021 | return; | |
1022 | ||
1023 | mutex_lock(&thermal_list_lock); | |
1024 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1025 | if (pos == cdev) | |
1026 | break; | |
1027 | if (pos != cdev) { | |
1028 | /* thermal cooling device not found */ | |
1029 | mutex_unlock(&thermal_list_lock); | |
1030 | return; | |
1031 | } | |
1032 | list_del(&cdev->node); | |
1033 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1034 | if (!tz->ops->unbind) | |
1035 | continue; | |
1036 | tz->ops->unbind(tz, cdev); | |
1037 | } | |
1038 | mutex_unlock(&thermal_list_lock); | |
1039 | if (cdev->type[0]) | |
543a9561 | 1040 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1041 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1042 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1043 | ||
1044 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1045 | device_unregister(&cdev->device); | |
1046 | return; | |
1047 | } | |
1048 | EXPORT_SYMBOL(thermal_cooling_device_unregister); | |
1049 | ||
b1569e99 MG |
1050 | /** |
1051 | * thermal_zone_device_update - force an update of a thermal zone's state | |
1052 | * @ttz: the thermal zone to update | |
1053 | */ | |
1054 | ||
1055 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
1056 | { | |
1057 | int count, ret = 0; | |
1058 | long temp, trip_temp; | |
1059 | enum thermal_trip_type trip_type; | |
1060 | struct thermal_cooling_device_instance *instance; | |
1061 | struct thermal_cooling_device *cdev; | |
e3f25e6e | 1062 | unsigned long cur_state, max_state; |
b1569e99 MG |
1063 | |
1064 | mutex_lock(&tz->lock); | |
1065 | ||
0d288162 MB |
1066 | if (tz->ops->get_temp(tz, &temp)) { |
1067 | /* get_temp failed - retry it later */ | |
c5a01dd5 | 1068 | pr_warn("failed to read out thermal zone %d\n", tz->id); |
0d288162 MB |
1069 | goto leave; |
1070 | } | |
b1569e99 MG |
1071 | |
1072 | for (count = 0; count < tz->trips; count++) { | |
1073 | tz->ops->get_trip_type(tz, count, &trip_type); | |
1074 | tz->ops->get_trip_temp(tz, count, &trip_temp); | |
1075 | ||
1076 | switch (trip_type) { | |
1077 | case THERMAL_TRIP_CRITICAL: | |
29321357 | 1078 | if (temp >= trip_temp) { |
b1569e99 MG |
1079 | if (tz->ops->notify) |
1080 | ret = tz->ops->notify(tz, count, | |
1081 | trip_type); | |
1082 | if (!ret) { | |
c5a01dd5 JP |
1083 | pr_emerg("Critical temperature reached (%ld C), shutting down\n", |
1084 | temp/1000); | |
b1569e99 MG |
1085 | orderly_poweroff(true); |
1086 | } | |
1087 | } | |
1088 | break; | |
1089 | case THERMAL_TRIP_HOT: | |
29321357 | 1090 | if (temp >= trip_temp) |
b1569e99 MG |
1091 | if (tz->ops->notify) |
1092 | tz->ops->notify(tz, count, trip_type); | |
1093 | break; | |
1094 | case THERMAL_TRIP_ACTIVE: | |
1095 | list_for_each_entry(instance, &tz->cooling_devices, | |
1096 | node) { | |
1097 | if (instance->trip != count) | |
1098 | continue; | |
1099 | ||
1100 | cdev = instance->cdev; | |
1101 | ||
e3f25e6e ZR |
1102 | cdev->ops->get_cur_state(cdev, &cur_state); |
1103 | cdev->ops->get_max_state(cdev, &max_state); | |
1104 | ||
29321357 | 1105 | if (temp >= trip_temp) |
e3f25e6e ZR |
1106 | cur_state = cur_state < max_state ? |
1107 | (cur_state + 1) : max_state; | |
b1569e99 | 1108 | else |
e3f25e6e ZR |
1109 | cur_state = cur_state > 0 ? |
1110 | (cur_state - 1) : 0; | |
1111 | ||
1112 | cdev->ops->set_cur_state(cdev, cur_state); | |
b1569e99 MG |
1113 | } |
1114 | break; | |
1115 | case THERMAL_TRIP_PASSIVE: | |
29321357 | 1116 | if (temp >= trip_temp || tz->passive) |
b1569e99 MG |
1117 | thermal_zone_device_passive(tz, temp, |
1118 | trip_temp, count); | |
1119 | break; | |
1120 | } | |
1121 | } | |
03a971a2 MG |
1122 | |
1123 | if (tz->forced_passive) | |
1124 | thermal_zone_device_passive(tz, temp, tz->forced_passive, | |
1125 | THERMAL_TRIPS_NONE); | |
1126 | ||
b1569e99 | 1127 | tz->last_temperature = temp; |
0d288162 | 1128 | |
caca8b80 | 1129 | leave: |
b1569e99 MG |
1130 | if (tz->passive) |
1131 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
1132 | else if (tz->polling_delay) | |
1133 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
3767cb54 FP |
1134 | else |
1135 | thermal_zone_device_set_polling(tz, 0); | |
b1569e99 MG |
1136 | mutex_unlock(&tz->lock); |
1137 | } | |
1138 | EXPORT_SYMBOL(thermal_zone_device_update); | |
1139 | ||
c56f5c03 D |
1140 | /** |
1141 | * create_trip_attrs - create attributes for trip points | |
1142 | * @tz: the thermal zone device | |
1143 | * @mask: Writeable trip point bitmap. | |
1144 | */ | |
1145 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1146 | { | |
1147 | int indx; | |
27365a6c | 1148 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1149 | |
27365a6c | 1150 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1151 | if (!tz->trip_type_attrs) |
1152 | return -ENOMEM; | |
1153 | ||
27365a6c | 1154 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1155 | if (!tz->trip_temp_attrs) { |
1156 | kfree(tz->trip_type_attrs); | |
1157 | return -ENOMEM; | |
1158 | } | |
1159 | ||
27365a6c D |
1160 | if (tz->ops->get_trip_hyst) { |
1161 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1162 | if (!tz->trip_hyst_attrs) { | |
1163 | kfree(tz->trip_type_attrs); | |
1164 | kfree(tz->trip_temp_attrs); | |
1165 | return -ENOMEM; | |
1166 | } | |
1167 | } | |
c56f5c03 | 1168 | |
27365a6c D |
1169 | |
1170 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1171 | /* create trip type attribute */ |
1172 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1173 | "trip_point_%d_type", indx); | |
1174 | ||
1175 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1176 | tz->trip_type_attrs[indx].attr.attr.name = | |
1177 | tz->trip_type_attrs[indx].name; | |
1178 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1179 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1180 | ||
1181 | device_create_file(&tz->device, | |
1182 | &tz->trip_type_attrs[indx].attr); | |
1183 | ||
1184 | /* create trip temp attribute */ | |
1185 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1186 | "trip_point_%d_temp", indx); | |
1187 | ||
1188 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1189 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1190 | tz->trip_temp_attrs[indx].name; | |
1191 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1192 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1193 | if (mask & (1 << indx)) { | |
1194 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1195 | tz->trip_temp_attrs[indx].attr.store = | |
1196 | trip_point_temp_store; | |
1197 | } | |
1198 | ||
1199 | device_create_file(&tz->device, | |
1200 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1201 | |
1202 | /* create Optional trip hyst attribute */ | |
1203 | if (!tz->ops->get_trip_hyst) | |
1204 | continue; | |
1205 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1206 | "trip_point_%d_hyst", indx); | |
1207 | ||
1208 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1209 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1210 | tz->trip_hyst_attrs[indx].name; | |
1211 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1212 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1213 | if (tz->ops->set_trip_hyst) { | |
1214 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1215 | tz->trip_hyst_attrs[indx].attr.store = | |
1216 | trip_point_hyst_store; | |
1217 | } | |
1218 | ||
1219 | device_create_file(&tz->device, | |
1220 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1221 | } |
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1226 | { | |
1227 | int indx; | |
1228 | ||
1229 | for (indx = 0; indx < tz->trips; indx++) { | |
1230 | device_remove_file(&tz->device, | |
1231 | &tz->trip_type_attrs[indx].attr); | |
1232 | device_remove_file(&tz->device, | |
1233 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1234 | if (tz->ops->get_trip_hyst) |
1235 | device_remove_file(&tz->device, | |
1236 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1237 | } |
1238 | kfree(tz->trip_type_attrs); | |
1239 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1240 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1241 | } |
1242 | ||
203d3d4a ZR |
1243 | /** |
1244 | * thermal_zone_device_register - register a new thermal zone device | |
1245 | * @type: the thermal zone device type | |
1246 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1247 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1248 | * @devdata: private device data |
1249 | * @ops: standard thermal zone device callbacks | |
b1569e99 MG |
1250 | * @tc1: thermal coefficient 1 for passive calculations |
1251 | * @tc2: thermal coefficient 2 for passive calculations | |
1252 | * @passive_delay: number of milliseconds to wait between polls when | |
1253 | * performing passive cooling | |
1254 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1255 | * whether trip points have been crossed (0 for interrupt | |
1256 | * driven systems) | |
203d3d4a ZR |
1257 | * |
1258 | * thermal_zone_device_unregister() must be called when the device is no | |
b1569e99 MG |
1259 | * longer needed. The passive cooling formula uses tc1 and tc2 as described in |
1260 | * section 11.1.5.1 of the ACPI specification 3.0. | |
203d3d4a | 1261 | */ |
4b1bf587 | 1262 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1263 | int trips, int mask, void *devdata, |
5b275ce2 AC |
1264 | const struct thermal_zone_device_ops *ops, |
1265 | int tc1, int tc2, int passive_delay, int polling_delay) | |
203d3d4a ZR |
1266 | { |
1267 | struct thermal_zone_device *tz; | |
1268 | struct thermal_cooling_device *pos; | |
03a971a2 | 1269 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1270 | int result; |
1271 | int count; | |
03a971a2 | 1272 | int passive = 0; |
203d3d4a ZR |
1273 | |
1274 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 1275 | return ERR_PTR(-EINVAL); |
203d3d4a | 1276 | |
c56f5c03 | 1277 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1278 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1279 | |
1280 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1281 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1282 | |
1283 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); | |
1284 | if (!tz) | |
3e6fda5c | 1285 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1286 | |
1287 | INIT_LIST_HEAD(&tz->cooling_devices); | |
1288 | idr_init(&tz->idr); | |
1289 | mutex_init(&tz->lock); | |
1290 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1291 | if (result) { | |
1292 | kfree(tz); | |
3e6fda5c | 1293 | return ERR_PTR(result); |
203d3d4a ZR |
1294 | } |
1295 | ||
1296 | strcpy(tz->type, type); | |
1297 | tz->ops = ops; | |
1298 | tz->device.class = &thermal_class; | |
1299 | tz->devdata = devdata; | |
1300 | tz->trips = trips; | |
b1569e99 MG |
1301 | tz->tc1 = tc1; |
1302 | tz->tc2 = tc2; | |
1303 | tz->passive_delay = passive_delay; | |
1304 | tz->polling_delay = polling_delay; | |
1305 | ||
354655ea | 1306 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1307 | result = device_register(&tz->device); |
1308 | if (result) { | |
1309 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1310 | kfree(tz); | |
3e6fda5c | 1311 | return ERR_PTR(result); |
203d3d4a ZR |
1312 | } |
1313 | ||
1314 | /* sys I/F */ | |
1315 | if (type) { | |
1316 | result = device_create_file(&tz->device, &dev_attr_type); | |
1317 | if (result) | |
1318 | goto unregister; | |
1319 | } | |
1320 | ||
1321 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1322 | if (result) | |
1323 | goto unregister; | |
1324 | ||
1325 | if (ops->get_mode) { | |
1326 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1327 | if (result) | |
1328 | goto unregister; | |
1329 | } | |
1330 | ||
c56f5c03 D |
1331 | result = create_trip_attrs(tz, mask); |
1332 | if (result) | |
1333 | goto unregister; | |
1334 | ||
203d3d4a | 1335 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1336 | tz->ops->get_trip_type(tz, count, &trip_type); |
1337 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1338 | passive = 1; | |
203d3d4a ZR |
1339 | } |
1340 | ||
03a971a2 MG |
1341 | if (!passive) |
1342 | result = device_create_file(&tz->device, | |
1343 | &dev_attr_passive); | |
1344 | ||
1345 | if (result) | |
1346 | goto unregister; | |
1347 | ||
e68b16ab ZR |
1348 | result = thermal_add_hwmon_sysfs(tz); |
1349 | if (result) | |
1350 | goto unregister; | |
1351 | ||
203d3d4a ZR |
1352 | mutex_lock(&thermal_list_lock); |
1353 | list_add_tail(&tz->node, &thermal_tz_list); | |
1354 | if (ops->bind) | |
1355 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
543a9561 LB |
1356 | result = ops->bind(tz, pos); |
1357 | if (result) | |
1358 | break; | |
203d3d4a ZR |
1359 | } |
1360 | mutex_unlock(&thermal_list_lock); | |
1361 | ||
b1569e99 MG |
1362 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1363 | ||
1364 | thermal_zone_device_update(tz); | |
1365 | ||
203d3d4a ZR |
1366 | if (!result) |
1367 | return tz; | |
1368 | ||
caca8b80 | 1369 | unregister: |
203d3d4a ZR |
1370 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1371 | device_unregister(&tz->device); | |
3e6fda5c | 1372 | return ERR_PTR(result); |
203d3d4a ZR |
1373 | } |
1374 | EXPORT_SYMBOL(thermal_zone_device_register); | |
1375 | ||
1376 | /** | |
1377 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1378 | * @tz: the thermal zone device to remove |
1379 | */ | |
1380 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1381 | { | |
1382 | struct thermal_cooling_device *cdev; | |
1383 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1384 | |
1385 | if (!tz) | |
1386 | return; | |
1387 | ||
1388 | mutex_lock(&thermal_list_lock); | |
1389 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1390 | if (pos == tz) | |
1391 | break; | |
1392 | if (pos != tz) { | |
1393 | /* thermal zone device not found */ | |
1394 | mutex_unlock(&thermal_list_lock); | |
1395 | return; | |
1396 | } | |
1397 | list_del(&tz->node); | |
1398 | if (tz->ops->unbind) | |
1399 | list_for_each_entry(cdev, &thermal_cdev_list, node) | |
1400 | tz->ops->unbind(tz, cdev); | |
1401 | mutex_unlock(&thermal_list_lock); | |
1402 | ||
b1569e99 MG |
1403 | thermal_zone_device_set_polling(tz, 0); |
1404 | ||
203d3d4a ZR |
1405 | if (tz->type[0]) |
1406 | device_remove_file(&tz->device, &dev_attr_type); | |
1407 | device_remove_file(&tz->device, &dev_attr_temp); | |
1408 | if (tz->ops->get_mode) | |
1409 | device_remove_file(&tz->device, &dev_attr_mode); | |
c56f5c03 | 1410 | remove_trip_attrs(tz); |
203d3d4a | 1411 | |
e68b16ab | 1412 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1413 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1414 | idr_destroy(&tz->idr); | |
1415 | mutex_destroy(&tz->lock); | |
1416 | device_unregister(&tz->device); | |
1417 | return; | |
1418 | } | |
1419 | EXPORT_SYMBOL(thermal_zone_device_unregister); | |
1420 | ||
af06216a RW |
1421 | #ifdef CONFIG_NET |
1422 | static struct genl_family thermal_event_genl_family = { | |
1423 | .id = GENL_ID_GENERATE, | |
1424 | .name = THERMAL_GENL_FAMILY_NAME, | |
1425 | .version = THERMAL_GENL_VERSION, | |
1426 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1427 | }; | |
1428 | ||
1429 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1430 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1431 | }; | |
1432 | ||
2d58d7ea | 1433 | int thermal_generate_netlink_event(u32 orig, enum events event) |
4cb18728 D |
1434 | { |
1435 | struct sk_buff *skb; | |
1436 | struct nlattr *attr; | |
1437 | struct thermal_genl_event *thermal_event; | |
1438 | void *msg_header; | |
1439 | int size; | |
1440 | int result; | |
b11de07c | 1441 | static unsigned int thermal_event_seqnum; |
4cb18728 D |
1442 | |
1443 | /* allocate memory */ | |
886ee546 JP |
1444 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1445 | nla_total_size(0); | |
4cb18728 D |
1446 | |
1447 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1448 | if (!skb) | |
1449 | return -ENOMEM; | |
1450 | ||
1451 | /* add the genetlink message header */ | |
1452 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1453 | &thermal_event_genl_family, 0, | |
1454 | THERMAL_GENL_CMD_EVENT); | |
1455 | if (!msg_header) { | |
1456 | nlmsg_free(skb); | |
1457 | return -ENOMEM; | |
1458 | } | |
1459 | ||
1460 | /* fill the data */ | |
886ee546 JP |
1461 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1462 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1463 | |
1464 | if (!attr) { | |
1465 | nlmsg_free(skb); | |
1466 | return -EINVAL; | |
1467 | } | |
1468 | ||
1469 | thermal_event = nla_data(attr); | |
1470 | if (!thermal_event) { | |
1471 | nlmsg_free(skb); | |
1472 | return -EINVAL; | |
1473 | } | |
1474 | ||
1475 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1476 | ||
1477 | thermal_event->orig = orig; | |
1478 | thermal_event->event = event; | |
1479 | ||
1480 | /* send multicast genetlink message */ | |
1481 | result = genlmsg_end(skb, msg_header); | |
1482 | if (result < 0) { | |
1483 | nlmsg_free(skb); | |
1484 | return result; | |
1485 | } | |
1486 | ||
1487 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1488 | if (result) | |
c5a01dd5 | 1489 | pr_info("failed to send netlink event:%d\n", result); |
4cb18728 D |
1490 | |
1491 | return result; | |
1492 | } | |
2d58d7ea | 1493 | EXPORT_SYMBOL(thermal_generate_netlink_event); |
4cb18728 D |
1494 | |
1495 | static int genetlink_init(void) | |
1496 | { | |
1497 | int result; | |
1498 | ||
1499 | result = genl_register_family(&thermal_event_genl_family); | |
1500 | if (result) | |
1501 | return result; | |
1502 | ||
1503 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1504 | &thermal_event_mcgrp); | |
1505 | if (result) | |
1506 | genl_unregister_family(&thermal_event_genl_family); | |
1507 | return result; | |
1508 | } | |
1509 | ||
af06216a RW |
1510 | static void genetlink_exit(void) |
1511 | { | |
1512 | genl_unregister_family(&thermal_event_genl_family); | |
1513 | } | |
1514 | #else /* !CONFIG_NET */ | |
1515 | static inline int genetlink_init(void) { return 0; } | |
1516 | static inline void genetlink_exit(void) {} | |
1517 | #endif /* !CONFIG_NET */ | |
1518 | ||
203d3d4a ZR |
1519 | static int __init thermal_init(void) |
1520 | { | |
1521 | int result = 0; | |
1522 | ||
1523 | result = class_register(&thermal_class); | |
1524 | if (result) { | |
1525 | idr_destroy(&thermal_tz_idr); | |
1526 | idr_destroy(&thermal_cdev_idr); | |
1527 | mutex_destroy(&thermal_idr_lock); | |
1528 | mutex_destroy(&thermal_list_lock); | |
1529 | } | |
4cb18728 | 1530 | result = genetlink_init(); |
203d3d4a ZR |
1531 | return result; |
1532 | } | |
1533 | ||
1534 | static void __exit thermal_exit(void) | |
1535 | { | |
1536 | class_unregister(&thermal_class); | |
1537 | idr_destroy(&thermal_tz_idr); | |
1538 | idr_destroy(&thermal_cdev_idr); | |
1539 | mutex_destroy(&thermal_idr_lock); | |
1540 | mutex_destroy(&thermal_list_lock); | |
4cb18728 | 1541 | genetlink_exit(); |
203d3d4a ZR |
1542 | } |
1543 | ||
4cb18728 | 1544 | fs_initcall(thermal_init); |
203d3d4a | 1545 | module_exit(thermal_exit); |