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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 | ||
74051ba5 ZR |
44 | /* |
45 | * This structure is used to describe the behavior of | |
46 | * a certain cooling device on a certain trip point | |
47 | * in a certain thermal zone | |
48 | */ | |
b81b6ba3 | 49 | struct thermal_instance { |
203d3d4a ZR |
50 | int id; |
51 | char name[THERMAL_NAME_LENGTH]; | |
52 | struct thermal_zone_device *tz; | |
53 | struct thermal_cooling_device *cdev; | |
54 | int trip; | |
74051ba5 ZR |
55 | unsigned long upper; /* Highest cooling state for this trip point */ |
56 | unsigned long lower; /* Lowest cooling state for this trip point */ | |
203d3d4a ZR |
57 | char attr_name[THERMAL_NAME_LENGTH]; |
58 | struct device_attribute attr; | |
cddf31b3 | 59 | struct list_head tz_node; /* node in tz->thermal_instances */ |
b5e4ae62 | 60 | struct list_head cdev_node; /* node in cdev->thermal_instances */ |
203d3d4a ZR |
61 | }; |
62 | ||
63 | static DEFINE_IDR(thermal_tz_idr); | |
64 | static DEFINE_IDR(thermal_cdev_idr); | |
65 | static DEFINE_MUTEX(thermal_idr_lock); | |
66 | ||
67 | static LIST_HEAD(thermal_tz_list); | |
68 | static LIST_HEAD(thermal_cdev_list); | |
69 | static DEFINE_MUTEX(thermal_list_lock); | |
70 | ||
71 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
72 | { | |
73 | int err; | |
74 | ||
caca8b80 | 75 | again: |
203d3d4a ZR |
76 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) |
77 | return -ENOMEM; | |
78 | ||
79 | if (lock) | |
80 | mutex_lock(lock); | |
81 | err = idr_get_new(idr, NULL, id); | |
82 | if (lock) | |
83 | mutex_unlock(lock); | |
84 | if (unlikely(err == -EAGAIN)) | |
85 | goto again; | |
86 | else if (unlikely(err)) | |
87 | return err; | |
88 | ||
89 | *id = *id & MAX_ID_MASK; | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
94 | { | |
95 | if (lock) | |
96 | mutex_lock(lock); | |
97 | idr_remove(idr, id); | |
98 | if (lock) | |
99 | mutex_unlock(lock); | |
100 | } | |
101 | ||
102 | /* sys I/F for thermal zone */ | |
103 | ||
104 | #define to_thermal_zone(_dev) \ | |
105 | container_of(_dev, struct thermal_zone_device, device) | |
106 | ||
107 | static ssize_t | |
108 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
109 | { | |
110 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
111 | ||
112 | return sprintf(buf, "%s\n", tz->type); | |
113 | } | |
114 | ||
115 | static ssize_t | |
116 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
117 | { | |
118 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
119 | long temperature; |
120 | int ret; | |
203d3d4a ZR |
121 | |
122 | if (!tz->ops->get_temp) | |
123 | return -EPERM; | |
124 | ||
6503e5df MG |
125 | ret = tz->ops->get_temp(tz, &temperature); |
126 | ||
127 | if (ret) | |
128 | return ret; | |
129 | ||
130 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
131 | } |
132 | ||
133 | static ssize_t | |
134 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
135 | { | |
136 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
137 | enum thermal_device_mode mode; |
138 | int result; | |
203d3d4a ZR |
139 | |
140 | if (!tz->ops->get_mode) | |
141 | return -EPERM; | |
142 | ||
6503e5df MG |
143 | result = tz->ops->get_mode(tz, &mode); |
144 | if (result) | |
145 | return result; | |
146 | ||
147 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
148 | : "disabled"); | |
203d3d4a ZR |
149 | } |
150 | ||
151 | static ssize_t | |
152 | mode_store(struct device *dev, struct device_attribute *attr, | |
153 | const char *buf, size_t count) | |
154 | { | |
155 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
156 | int result; | |
157 | ||
158 | if (!tz->ops->set_mode) | |
159 | return -EPERM; | |
160 | ||
f1f0e2ac | 161 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 162 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 163 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
164 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
165 | else | |
166 | result = -EINVAL; | |
167 | ||
203d3d4a ZR |
168 | if (result) |
169 | return result; | |
170 | ||
171 | return count; | |
172 | } | |
173 | ||
174 | static ssize_t | |
175 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
176 | char *buf) | |
177 | { | |
178 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
179 | enum thermal_trip_type type; |
180 | int trip, result; | |
203d3d4a ZR |
181 | |
182 | if (!tz->ops->get_trip_type) | |
183 | return -EPERM; | |
184 | ||
185 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
186 | return -EINVAL; | |
187 | ||
6503e5df MG |
188 | result = tz->ops->get_trip_type(tz, trip, &type); |
189 | if (result) | |
190 | return result; | |
191 | ||
192 | switch (type) { | |
193 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 194 | return sprintf(buf, "critical\n"); |
6503e5df | 195 | case THERMAL_TRIP_HOT: |
625120a4 | 196 | return sprintf(buf, "hot\n"); |
6503e5df | 197 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 198 | return sprintf(buf, "passive\n"); |
6503e5df | 199 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 200 | return sprintf(buf, "active\n"); |
6503e5df | 201 | default: |
625120a4 | 202 | return sprintf(buf, "unknown\n"); |
6503e5df | 203 | } |
203d3d4a ZR |
204 | } |
205 | ||
c56f5c03 D |
206 | static ssize_t |
207 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
208 | const char *buf, size_t count) | |
209 | { | |
210 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
211 | int trip, ret; | |
212 | unsigned long temperature; | |
213 | ||
214 | if (!tz->ops->set_trip_temp) | |
215 | return -EPERM; | |
216 | ||
217 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
218 | return -EINVAL; | |
219 | ||
220 | if (kstrtoul(buf, 10, &temperature)) | |
221 | return -EINVAL; | |
222 | ||
223 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
224 | ||
225 | return ret ? ret : count; | |
226 | } | |
227 | ||
203d3d4a ZR |
228 | static ssize_t |
229 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
230 | char *buf) | |
231 | { | |
232 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
233 | int trip, ret; |
234 | long temperature; | |
203d3d4a ZR |
235 | |
236 | if (!tz->ops->get_trip_temp) | |
237 | return -EPERM; | |
238 | ||
239 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
240 | return -EINVAL; | |
241 | ||
6503e5df MG |
242 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
243 | ||
244 | if (ret) | |
245 | return ret; | |
246 | ||
247 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
248 | } |
249 | ||
27365a6c D |
250 | static ssize_t |
251 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
252 | const char *buf, size_t count) | |
253 | { | |
254 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
255 | int trip, ret; | |
256 | unsigned long temperature; | |
257 | ||
258 | if (!tz->ops->set_trip_hyst) | |
259 | return -EPERM; | |
260 | ||
261 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
262 | return -EINVAL; | |
263 | ||
264 | if (kstrtoul(buf, 10, &temperature)) | |
265 | return -EINVAL; | |
266 | ||
267 | /* | |
268 | * We are not doing any check on the 'temperature' value | |
269 | * here. The driver implementing 'set_trip_hyst' has to | |
270 | * take care of this. | |
271 | */ | |
272 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
273 | ||
274 | return ret ? ret : count; | |
275 | } | |
276 | ||
277 | static ssize_t | |
278 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
279 | char *buf) | |
280 | { | |
281 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
282 | int trip, ret; | |
283 | unsigned long temperature; | |
284 | ||
285 | if (!tz->ops->get_trip_hyst) | |
286 | return -EPERM; | |
287 | ||
288 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
289 | return -EINVAL; | |
290 | ||
291 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
292 | ||
293 | return ret ? ret : sprintf(buf, "%ld\n", temperature); | |
294 | } | |
295 | ||
03a971a2 MG |
296 | static ssize_t |
297 | passive_store(struct device *dev, struct device_attribute *attr, | |
298 | const char *buf, size_t count) | |
299 | { | |
300 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
301 | struct thermal_cooling_device *cdev = NULL; | |
302 | int state; | |
303 | ||
304 | if (!sscanf(buf, "%d\n", &state)) | |
305 | return -EINVAL; | |
306 | ||
3d8e3ad8 FP |
307 | /* sanity check: values below 1000 millicelcius don't make sense |
308 | * and can cause the system to go into a thermal heart attack | |
309 | */ | |
310 | if (state && state < 1000) | |
311 | return -EINVAL; | |
312 | ||
03a971a2 MG |
313 | if (state && !tz->forced_passive) { |
314 | mutex_lock(&thermal_list_lock); | |
315 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
316 | if (!strncmp("Processor", cdev->type, | |
317 | sizeof("Processor"))) | |
318 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
319 | THERMAL_TRIPS_NONE, cdev, |
320 | THERMAL_NO_LIMIT, | |
321 | THERMAL_NO_LIMIT); | |
03a971a2 MG |
322 | } |
323 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
324 | if (!tz->passive_delay) |
325 | tz->passive_delay = 1000; | |
03a971a2 MG |
326 | } else if (!state && tz->forced_passive) { |
327 | mutex_lock(&thermal_list_lock); | |
328 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
329 | if (!strncmp("Processor", cdev->type, | |
330 | sizeof("Processor"))) | |
331 | thermal_zone_unbind_cooling_device(tz, | |
332 | THERMAL_TRIPS_NONE, | |
333 | cdev); | |
334 | } | |
335 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 336 | tz->passive_delay = 0; |
03a971a2 MG |
337 | } |
338 | ||
03a971a2 MG |
339 | tz->forced_passive = state; |
340 | ||
341 | thermal_zone_device_update(tz); | |
342 | ||
343 | return count; | |
344 | } | |
345 | ||
346 | static ssize_t | |
347 | passive_show(struct device *dev, struct device_attribute *attr, | |
348 | char *buf) | |
349 | { | |
350 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
351 | ||
352 | return sprintf(buf, "%d\n", tz->forced_passive); | |
353 | } | |
354 | ||
203d3d4a ZR |
355 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
356 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
357 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 358 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
203d3d4a | 359 | |
203d3d4a ZR |
360 | /* sys I/F for cooling device */ |
361 | #define to_cooling_device(_dev) \ | |
362 | container_of(_dev, struct thermal_cooling_device, device) | |
363 | ||
364 | static ssize_t | |
365 | thermal_cooling_device_type_show(struct device *dev, | |
366 | struct device_attribute *attr, char *buf) | |
367 | { | |
368 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
369 | ||
370 | return sprintf(buf, "%s\n", cdev->type); | |
371 | } | |
372 | ||
373 | static ssize_t | |
374 | thermal_cooling_device_max_state_show(struct device *dev, | |
375 | struct device_attribute *attr, char *buf) | |
376 | { | |
377 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
378 | unsigned long state; |
379 | int ret; | |
203d3d4a | 380 | |
6503e5df MG |
381 | ret = cdev->ops->get_max_state(cdev, &state); |
382 | if (ret) | |
383 | return ret; | |
384 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
385 | } |
386 | ||
387 | static ssize_t | |
388 | thermal_cooling_device_cur_state_show(struct device *dev, | |
389 | struct device_attribute *attr, char *buf) | |
390 | { | |
391 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
392 | unsigned long state; |
393 | int ret; | |
203d3d4a | 394 | |
6503e5df MG |
395 | ret = cdev->ops->get_cur_state(cdev, &state); |
396 | if (ret) | |
397 | return ret; | |
398 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
399 | } |
400 | ||
401 | static ssize_t | |
402 | thermal_cooling_device_cur_state_store(struct device *dev, | |
403 | struct device_attribute *attr, | |
404 | const char *buf, size_t count) | |
405 | { | |
406 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 407 | unsigned long state; |
203d3d4a ZR |
408 | int result; |
409 | ||
6503e5df | 410 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
411 | return -EINVAL; |
412 | ||
edb94918 | 413 | if ((long)state < 0) |
203d3d4a ZR |
414 | return -EINVAL; |
415 | ||
416 | result = cdev->ops->set_cur_state(cdev, state); | |
417 | if (result) | |
418 | return result; | |
419 | return count; | |
420 | } | |
421 | ||
422 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 423 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
424 | static DEVICE_ATTR(max_state, 0444, |
425 | thermal_cooling_device_max_state_show, NULL); | |
426 | static DEVICE_ATTR(cur_state, 0644, | |
427 | thermal_cooling_device_cur_state_show, | |
428 | thermal_cooling_device_cur_state_store); | |
429 | ||
430 | static ssize_t | |
431 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 432 | struct device_attribute *attr, char *buf) |
203d3d4a | 433 | { |
b81b6ba3 | 434 | struct thermal_instance *instance; |
203d3d4a ZR |
435 | |
436 | instance = | |
b81b6ba3 | 437 | container_of(attr, struct thermal_instance, attr); |
203d3d4a ZR |
438 | |
439 | if (instance->trip == THERMAL_TRIPS_NONE) | |
440 | return sprintf(buf, "-1\n"); | |
441 | else | |
442 | return sprintf(buf, "%d\n", instance->trip); | |
443 | } | |
444 | ||
445 | /* Device management */ | |
446 | ||
16d75239 RH |
447 | #if defined(CONFIG_THERMAL_HWMON) |
448 | ||
e68b16ab ZR |
449 | /* hwmon sys I/F */ |
450 | #include <linux/hwmon.h> | |
31f5396a JD |
451 | |
452 | /* thermal zone devices with the same type share one hwmon device */ | |
453 | struct thermal_hwmon_device { | |
454 | char type[THERMAL_NAME_LENGTH]; | |
455 | struct device *device; | |
456 | int count; | |
457 | struct list_head tz_list; | |
458 | struct list_head node; | |
459 | }; | |
460 | ||
461 | struct thermal_hwmon_attr { | |
462 | struct device_attribute attr; | |
463 | char name[16]; | |
464 | }; | |
465 | ||
466 | /* one temperature input for each thermal zone */ | |
467 | struct thermal_hwmon_temp { | |
468 | struct list_head hwmon_node; | |
469 | struct thermal_zone_device *tz; | |
470 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
471 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
472 | }; | |
473 | ||
e68b16ab ZR |
474 | static LIST_HEAD(thermal_hwmon_list); |
475 | ||
476 | static ssize_t | |
477 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
478 | { | |
0e968a3b | 479 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
480 | return sprintf(buf, "%s\n", hwmon->type); |
481 | } | |
482 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
483 | ||
484 | static ssize_t | |
485 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
486 | { | |
6503e5df MG |
487 | long temperature; |
488 | int ret; | |
e68b16ab ZR |
489 | struct thermal_hwmon_attr *hwmon_attr |
490 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
491 | struct thermal_hwmon_temp *temp |
492 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 493 | temp_input); |
31f5396a | 494 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 495 | |
6503e5df MG |
496 | ret = tz->ops->get_temp(tz, &temperature); |
497 | ||
498 | if (ret) | |
499 | return ret; | |
500 | ||
501 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
502 | } |
503 | ||
504 | static ssize_t | |
505 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
506 | char *buf) | |
507 | { | |
508 | struct thermal_hwmon_attr *hwmon_attr | |
509 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
510 | struct thermal_hwmon_temp *temp |
511 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 512 | temp_crit); |
31f5396a | 513 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
514 | long temperature; |
515 | int ret; | |
516 | ||
517 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
518 | if (ret) | |
519 | return ret; | |
e68b16ab | 520 | |
6503e5df | 521 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
522 | } |
523 | ||
524 | ||
0d97d7a4 JD |
525 | static struct thermal_hwmon_device * |
526 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
527 | { |
528 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
529 | |
530 | mutex_lock(&thermal_list_lock); | |
531 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
532 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 533 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 534 | return hwmon; |
e68b16ab ZR |
535 | } |
536 | mutex_unlock(&thermal_list_lock); | |
537 | ||
0d97d7a4 JD |
538 | return NULL; |
539 | } | |
540 | ||
31f5396a JD |
541 | /* Find the temperature input matching a given thermal zone */ |
542 | static struct thermal_hwmon_temp * | |
543 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
544 | const struct thermal_zone_device *tz) | |
545 | { | |
546 | struct thermal_hwmon_temp *temp; | |
547 | ||
548 | mutex_lock(&thermal_list_lock); | |
549 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
550 | if (temp->tz == tz) { | |
551 | mutex_unlock(&thermal_list_lock); | |
552 | return temp; | |
553 | } | |
554 | mutex_unlock(&thermal_list_lock); | |
555 | ||
556 | return NULL; | |
557 | } | |
558 | ||
0d97d7a4 JD |
559 | static int |
560 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
561 | { | |
562 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 563 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
564 | int new_hwmon_device = 1; |
565 | int result; | |
566 | ||
567 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
568 | if (hwmon) { | |
569 | new_hwmon_device = 0; | |
570 | goto register_sys_interface; | |
571 | } | |
572 | ||
e68b16ab ZR |
573 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
574 | if (!hwmon) | |
575 | return -ENOMEM; | |
576 | ||
577 | INIT_LIST_HEAD(&hwmon->tz_list); | |
578 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
579 | hwmon->device = hwmon_device_register(NULL); | |
580 | if (IS_ERR(hwmon->device)) { | |
581 | result = PTR_ERR(hwmon->device); | |
582 | goto free_mem; | |
583 | } | |
0e968a3b | 584 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
585 | result = device_create_file(hwmon->device, &dev_attr_name); |
586 | if (result) | |
b299eb5c | 587 | goto free_mem; |
e68b16ab ZR |
588 | |
589 | register_sys_interface: | |
31f5396a JD |
590 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
591 | if (!temp) { | |
592 | result = -ENOMEM; | |
593 | goto unregister_name; | |
594 | } | |
595 | ||
596 | temp->tz = tz; | |
e68b16ab ZR |
597 | hwmon->count++; |
598 | ||
31f5396a | 599 | snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH, |
e68b16ab | 600 | "temp%d_input", hwmon->count); |
31f5396a JD |
601 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
602 | temp->temp_input.attr.attr.mode = 0444; | |
603 | temp->temp_input.attr.show = temp_input_show; | |
604 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
605 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 606 | if (result) |
31f5396a | 607 | goto free_temp_mem; |
e68b16ab ZR |
608 | |
609 | if (tz->ops->get_crit_temp) { | |
610 | unsigned long temperature; | |
611 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
31f5396a | 612 | snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH, |
e68b16ab | 613 | "temp%d_crit", hwmon->count); |
31f5396a JD |
614 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
615 | temp->temp_crit.attr.attr.mode = 0444; | |
616 | temp->temp_crit.attr.show = temp_crit_show; | |
617 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 618 | result = device_create_file(hwmon->device, |
31f5396a | 619 | &temp->temp_crit.attr); |
e68b16ab | 620 | if (result) |
b299eb5c | 621 | goto unregister_input; |
e68b16ab ZR |
622 | } |
623 | } | |
624 | ||
625 | mutex_lock(&thermal_list_lock); | |
626 | if (new_hwmon_device) | |
627 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 628 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
629 | mutex_unlock(&thermal_list_lock); |
630 | ||
631 | return 0; | |
632 | ||
b299eb5c | 633 | unregister_input: |
31f5396a JD |
634 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
635 | free_temp_mem: | |
636 | kfree(temp); | |
b299eb5c | 637 | unregister_name: |
e68b16ab ZR |
638 | if (new_hwmon_device) { |
639 | device_remove_file(hwmon->device, &dev_attr_name); | |
640 | hwmon_device_unregister(hwmon->device); | |
641 | } | |
642 | free_mem: | |
643 | if (new_hwmon_device) | |
644 | kfree(hwmon); | |
645 | ||
646 | return result; | |
647 | } | |
648 | ||
649 | static void | |
650 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
651 | { | |
31f5396a JD |
652 | struct thermal_hwmon_device *hwmon; |
653 | struct thermal_hwmon_temp *temp; | |
654 | ||
655 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
656 | if (unlikely(!hwmon)) { | |
657 | /* Should never happen... */ | |
658 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
659 | return; | |
660 | } | |
661 | ||
662 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
663 | if (unlikely(!temp)) { | |
664 | /* Should never happen... */ | |
665 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
666 | return; | |
667 | } | |
e68b16ab | 668 | |
31f5396a | 669 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 670 | if (tz->ops->get_crit_temp) |
31f5396a | 671 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
672 | |
673 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
674 | list_del(&temp->hwmon_node); |
675 | kfree(temp); | |
e68b16ab ZR |
676 | if (!list_empty(&hwmon->tz_list)) { |
677 | mutex_unlock(&thermal_list_lock); | |
678 | return; | |
679 | } | |
680 | list_del(&hwmon->node); | |
681 | mutex_unlock(&thermal_list_lock); | |
682 | ||
683 | device_remove_file(hwmon->device, &dev_attr_name); | |
684 | hwmon_device_unregister(hwmon->device); | |
685 | kfree(hwmon); | |
686 | } | |
687 | #else | |
688 | static int | |
689 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
690 | { | |
691 | return 0; | |
692 | } | |
693 | ||
694 | static void | |
695 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
696 | { | |
697 | } | |
698 | #endif | |
699 | ||
b1569e99 MG |
700 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
701 | int delay) | |
702 | { | |
703 | cancel_delayed_work(&(tz->poll_queue)); | |
704 | ||
705 | if (!delay) | |
706 | return; | |
707 | ||
708 | if (delay > 1000) | |
51e20d0e | 709 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
710 | round_jiffies(msecs_to_jiffies(delay))); |
711 | else | |
51e20d0e | 712 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
713 | msecs_to_jiffies(delay)); |
714 | } | |
715 | ||
716 | static void thermal_zone_device_passive(struct thermal_zone_device *tz, | |
717 | int temp, int trip_temp, int trip) | |
718 | { | |
1b7ddb84 | 719 | enum thermal_trend trend; |
b81b6ba3 | 720 | struct thermal_instance *instance; |
b1569e99 MG |
721 | struct thermal_cooling_device *cdev; |
722 | long state, max_state; | |
723 | ||
1b7ddb84 | 724 | if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { |
601f3d42 ZR |
725 | /* |
726 | * compare the current temperature and previous temperature | |
727 | * to get the thermal trend, if no special requirement | |
728 | */ | |
729 | if (tz->temperature > tz->last_temperature) | |
730 | trend = THERMAL_TREND_RAISING; | |
731 | else if (tz->temperature < tz->last_temperature) | |
732 | trend = THERMAL_TREND_DROPPING; | |
733 | else | |
734 | trend = THERMAL_TREND_STABLE; | |
735 | } | |
736 | ||
b1569e99 MG |
737 | /* |
738 | * Above Trip? | |
739 | * ----------- | |
740 | * Calculate the thermal trend (using the passive cooling equation) | |
741 | * and modify the performance limit for all passive cooling devices | |
742 | * accordingly. Note that we assume symmetry. | |
743 | */ | |
744 | if (temp >= trip_temp) { | |
745 | tz->passive = true; | |
746 | ||
b1569e99 | 747 | /* Heating up? */ |
1b7ddb84 | 748 | if (trend == THERMAL_TREND_RAISING) { |
2d374139 | 749 | list_for_each_entry(instance, &tz->thermal_instances, |
cddf31b3 | 750 | tz_node) { |
b1569e99 MG |
751 | if (instance->trip != trip) |
752 | continue; | |
753 | cdev = instance->cdev; | |
754 | cdev->ops->get_cur_state(cdev, &state); | |
755 | cdev->ops->get_max_state(cdev, &max_state); | |
756 | if (state++ < max_state) | |
757 | cdev->ops->set_cur_state(cdev, state); | |
758 | } | |
1b7ddb84 | 759 | } else if (trend == THERMAL_TREND_DROPPING) { /* Cooling off? */ |
2d374139 | 760 | list_for_each_entry(instance, &tz->thermal_instances, |
cddf31b3 | 761 | tz_node) { |
b1569e99 MG |
762 | if (instance->trip != trip) |
763 | continue; | |
764 | cdev = instance->cdev; | |
765 | cdev->ops->get_cur_state(cdev, &state); | |
766 | cdev->ops->get_max_state(cdev, &max_state); | |
767 | if (state > 0) | |
768 | cdev->ops->set_cur_state(cdev, --state); | |
769 | } | |
770 | } | |
771 | return; | |
772 | } | |
773 | ||
774 | /* | |
775 | * Below Trip? | |
776 | * ----------- | |
777 | * Implement passive cooling hysteresis to slowly increase performance | |
778 | * and avoid thrashing around the passive trip point. Note that we | |
779 | * assume symmetry. | |
780 | */ | |
cddf31b3 | 781 | list_for_each_entry(instance, &tz->thermal_instances, tz_node) { |
b1569e99 MG |
782 | if (instance->trip != trip) |
783 | continue; | |
784 | cdev = instance->cdev; | |
785 | cdev->ops->get_cur_state(cdev, &state); | |
786 | cdev->ops->get_max_state(cdev, &max_state); | |
787 | if (state > 0) | |
788 | cdev->ops->set_cur_state(cdev, --state); | |
789 | if (state == 0) | |
790 | tz->passive = false; | |
791 | } | |
792 | } | |
793 | ||
794 | static void thermal_zone_device_check(struct work_struct *work) | |
795 | { | |
796 | struct thermal_zone_device *tz = container_of(work, struct | |
797 | thermal_zone_device, | |
798 | poll_queue.work); | |
799 | thermal_zone_device_update(tz); | |
800 | } | |
e68b16ab | 801 | |
203d3d4a ZR |
802 | /** |
803 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
804 | * @tz: thermal zone device |
805 | * @trip: indicates which trip point the cooling devices is | |
806 | * associated with in this thermal zone. | |
807 | * @cdev: thermal cooling device | |
543a9561 LB |
808 | * |
809 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
810 | */ |
811 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
812 | int trip, | |
9d99842f ZR |
813 | struct thermal_cooling_device *cdev, |
814 | unsigned long upper, unsigned long lower) | |
203d3d4a | 815 | { |
b81b6ba3 ZR |
816 | struct thermal_instance *dev; |
817 | struct thermal_instance *pos; | |
c7516709 TS |
818 | struct thermal_zone_device *pos1; |
819 | struct thermal_cooling_device *pos2; | |
74051ba5 | 820 | unsigned long max_state; |
203d3d4a ZR |
821 | int result; |
822 | ||
543a9561 | 823 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
824 | return -EINVAL; |
825 | ||
c7516709 TS |
826 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
827 | if (pos1 == tz) | |
828 | break; | |
829 | } | |
830 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
831 | if (pos2 == cdev) | |
832 | break; | |
833 | } | |
834 | ||
835 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
836 | return -EINVAL; |
837 | ||
9d99842f ZR |
838 | cdev->ops->get_max_state(cdev, &max_state); |
839 | ||
840 | /* lower default 0, upper default max_state */ | |
841 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
842 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
843 | ||
844 | if (lower > upper || upper > max_state) | |
845 | return -EINVAL; | |
846 | ||
203d3d4a | 847 | dev = |
b81b6ba3 | 848 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
849 | if (!dev) |
850 | return -ENOMEM; | |
851 | dev->tz = tz; | |
852 | dev->cdev = cdev; | |
853 | dev->trip = trip; | |
9d99842f ZR |
854 | dev->upper = upper; |
855 | dev->lower = lower; | |
74051ba5 | 856 | |
203d3d4a ZR |
857 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
858 | if (result) | |
859 | goto free_mem; | |
860 | ||
861 | sprintf(dev->name, "cdev%d", dev->id); | |
862 | result = | |
863 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
864 | if (result) | |
865 | goto release_idr; | |
866 | ||
867 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 868 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
869 | dev->attr.attr.name = dev->attr_name; |
870 | dev->attr.attr.mode = 0444; | |
871 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
872 | result = device_create_file(&tz->device, &dev->attr); | |
873 | if (result) | |
874 | goto remove_symbol_link; | |
875 | ||
876 | mutex_lock(&tz->lock); | |
cddf31b3 | 877 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
878 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
879 | result = -EEXIST; | |
880 | break; | |
881 | } | |
b5e4ae62 | 882 | if (!result) { |
cddf31b3 | 883 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 ZR |
884 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
885 | } | |
203d3d4a ZR |
886 | mutex_unlock(&tz->lock); |
887 | ||
888 | if (!result) | |
889 | return 0; | |
890 | ||
891 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 892 | remove_symbol_link: |
203d3d4a | 893 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 894 | release_idr: |
203d3d4a | 895 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 896 | free_mem: |
203d3d4a ZR |
897 | kfree(dev); |
898 | return result; | |
899 | } | |
900 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); | |
901 | ||
902 | /** | |
903 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
904 | * @tz: thermal zone device |
905 | * @trip: indicates which trip point the cooling devices is | |
906 | * associated with in this thermal zone. | |
907 | * @cdev: thermal cooling device | |
543a9561 LB |
908 | * |
909 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
910 | */ |
911 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
912 | int trip, | |
913 | struct thermal_cooling_device *cdev) | |
914 | { | |
b81b6ba3 | 915 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
916 | |
917 | mutex_lock(&tz->lock); | |
cddf31b3 | 918 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 919 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 920 | list_del(&pos->tz_node); |
b5e4ae62 | 921 | list_del(&pos->cdev_node); |
203d3d4a ZR |
922 | mutex_unlock(&tz->lock); |
923 | goto unbind; | |
924 | } | |
925 | } | |
926 | mutex_unlock(&tz->lock); | |
927 | ||
928 | return -ENODEV; | |
929 | ||
caca8b80 | 930 | unbind: |
203d3d4a ZR |
931 | device_remove_file(&tz->device, &pos->attr); |
932 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
933 | release_idr(&tz->idr, &tz->lock, pos->id); | |
934 | kfree(pos); | |
935 | return 0; | |
936 | } | |
937 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); | |
938 | ||
939 | static void thermal_release(struct device *dev) | |
940 | { | |
941 | struct thermal_zone_device *tz; | |
942 | struct thermal_cooling_device *cdev; | |
943 | ||
caca8b80 JP |
944 | if (!strncmp(dev_name(dev), "thermal_zone", |
945 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
946 | tz = to_thermal_zone(dev); |
947 | kfree(tz); | |
948 | } else { | |
949 | cdev = to_cooling_device(dev); | |
950 | kfree(cdev); | |
951 | } | |
952 | } | |
953 | ||
954 | static struct class thermal_class = { | |
955 | .name = "thermal", | |
956 | .dev_release = thermal_release, | |
957 | }; | |
958 | ||
959 | /** | |
960 | * thermal_cooling_device_register - register a new thermal cooling device | |
961 | * @type: the thermal cooling device type. | |
962 | * @devdata: device private data. | |
963 | * @ops: standard thermal cooling devices callbacks. | |
964 | */ | |
caca8b80 JP |
965 | struct thermal_cooling_device * |
966 | thermal_cooling_device_register(char *type, void *devdata, | |
967 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
968 | { |
969 | struct thermal_cooling_device *cdev; | |
970 | struct thermal_zone_device *pos; | |
971 | int result; | |
972 | ||
973 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 974 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
975 | |
976 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 977 | !ops->set_cur_state) |
3e6fda5c | 978 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
979 | |
980 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
981 | if (!cdev) | |
3e6fda5c | 982 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
983 | |
984 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
985 | if (result) { | |
986 | kfree(cdev); | |
3e6fda5c | 987 | return ERR_PTR(result); |
203d3d4a ZR |
988 | } |
989 | ||
990 | strcpy(cdev->type, type); | |
b5e4ae62 | 991 | INIT_LIST_HEAD(&cdev->thermal_instances); |
203d3d4a ZR |
992 | cdev->ops = ops; |
993 | cdev->device.class = &thermal_class; | |
994 | cdev->devdata = devdata; | |
354655ea | 995 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
996 | result = device_register(&cdev->device); |
997 | if (result) { | |
998 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
999 | kfree(cdev); | |
3e6fda5c | 1000 | return ERR_PTR(result); |
203d3d4a ZR |
1001 | } |
1002 | ||
1003 | /* sys I/F */ | |
1004 | if (type) { | |
543a9561 | 1005 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1006 | if (result) |
1007 | goto unregister; | |
1008 | } | |
1009 | ||
1010 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
1011 | if (result) | |
1012 | goto unregister; | |
1013 | ||
1014 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
1015 | if (result) | |
1016 | goto unregister; | |
1017 | ||
1018 | mutex_lock(&thermal_list_lock); | |
1019 | list_add(&cdev->node, &thermal_cdev_list); | |
1020 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
1021 | if (!pos->ops->bind) | |
1022 | continue; | |
1023 | result = pos->ops->bind(pos, cdev); | |
1024 | if (result) | |
1025 | break; | |
1026 | ||
1027 | } | |
1028 | mutex_unlock(&thermal_list_lock); | |
1029 | ||
1030 | if (!result) | |
1031 | return cdev; | |
1032 | ||
caca8b80 | 1033 | unregister: |
203d3d4a ZR |
1034 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1035 | device_unregister(&cdev->device); | |
3e6fda5c | 1036 | return ERR_PTR(result); |
203d3d4a ZR |
1037 | } |
1038 | EXPORT_SYMBOL(thermal_cooling_device_register); | |
1039 | ||
1040 | /** | |
1041 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1042 | * @cdev: the thermal cooling device to remove. |
1043 | * | |
1044 | * thermal_cooling_device_unregister() must be called when the device is no | |
1045 | * longer needed. | |
1046 | */ | |
1047 | void thermal_cooling_device_unregister(struct | |
1048 | thermal_cooling_device | |
1049 | *cdev) | |
1050 | { | |
1051 | struct thermal_zone_device *tz; | |
1052 | struct thermal_cooling_device *pos = NULL; | |
1053 | ||
1054 | if (!cdev) | |
1055 | return; | |
1056 | ||
1057 | mutex_lock(&thermal_list_lock); | |
1058 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1059 | if (pos == cdev) | |
1060 | break; | |
1061 | if (pos != cdev) { | |
1062 | /* thermal cooling device not found */ | |
1063 | mutex_unlock(&thermal_list_lock); | |
1064 | return; | |
1065 | } | |
1066 | list_del(&cdev->node); | |
1067 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1068 | if (!tz->ops->unbind) | |
1069 | continue; | |
1070 | tz->ops->unbind(tz, cdev); | |
1071 | } | |
1072 | mutex_unlock(&thermal_list_lock); | |
1073 | if (cdev->type[0]) | |
543a9561 | 1074 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1075 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1076 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1077 | ||
1078 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1079 | device_unregister(&cdev->device); | |
1080 | return; | |
1081 | } | |
1082 | EXPORT_SYMBOL(thermal_cooling_device_unregister); | |
1083 | ||
4ae46bef ZR |
1084 | /* |
1085 | * Cooling algorithm for active trip points | |
1086 | * | |
1087 | * 1. if the temperature is higher than a trip point, | |
1088 | * a. if the trend is THERMAL_TREND_RAISING, use higher cooling | |
1089 | * state for this trip point | |
1090 | * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling | |
1091 | * state for this trip point | |
1092 | * | |
1093 | * 2. if the temperature is lower than a trip point, use lower | |
1094 | * cooling state for this trip point | |
1095 | * | |
1096 | * Note that this behaves the same as the previous passive cooling | |
1097 | * algorithm. | |
1098 | */ | |
1099 | ||
1100 | static void thermal_zone_trip_update(struct thermal_zone_device *tz, | |
1101 | int trip, long temp) | |
1102 | { | |
b81b6ba3 | 1103 | struct thermal_instance *instance; |
4ae46bef ZR |
1104 | struct thermal_cooling_device *cdev = NULL; |
1105 | unsigned long cur_state, max_state; | |
1106 | long trip_temp; | |
1107 | enum thermal_trend trend; | |
1108 | ||
1109 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
1110 | ||
1111 | if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { | |
1112 | /* | |
1113 | * compare the current temperature and previous temperature | |
1114 | * to get the thermal trend, if no special requirement | |
1115 | */ | |
1116 | if (tz->temperature > tz->last_temperature) | |
1117 | trend = THERMAL_TREND_RAISING; | |
1118 | else if (tz->temperature < tz->last_temperature) | |
1119 | trend = THERMAL_TREND_DROPPING; | |
1120 | else | |
1121 | trend = THERMAL_TREND_STABLE; | |
1122 | } | |
1123 | ||
1124 | if (temp >= trip_temp) { | |
cddf31b3 | 1125 | list_for_each_entry(instance, &tz->thermal_instances, tz_node) { |
4ae46bef ZR |
1126 | if (instance->trip != trip) |
1127 | continue; | |
1128 | ||
1129 | cdev = instance->cdev; | |
1130 | ||
1131 | cdev->ops->get_cur_state(cdev, &cur_state); | |
1132 | cdev->ops->get_max_state(cdev, &max_state); | |
1133 | ||
1134 | if (trend == THERMAL_TREND_RAISING) { | |
1135 | cur_state = cur_state < instance->upper ? | |
1136 | (cur_state + 1) : instance->upper; | |
1137 | } else if (trend == THERMAL_TREND_DROPPING) { | |
1138 | cur_state = cur_state > instance->lower ? | |
1139 | (cur_state - 1) : instance->lower; | |
1140 | } | |
1141 | cdev->ops->set_cur_state(cdev, cur_state); | |
1142 | } | |
1143 | } else { /* below trip */ | |
cddf31b3 | 1144 | list_for_each_entry(instance, &tz->thermal_instances, tz_node) { |
4ae46bef ZR |
1145 | if (instance->trip != trip) |
1146 | continue; | |
1147 | ||
1148 | cdev = instance->cdev; | |
1149 | cdev->ops->get_cur_state(cdev, &cur_state); | |
1150 | ||
1151 | cur_state = cur_state > instance->lower ? | |
1152 | (cur_state - 1) : instance->lower; | |
1153 | cdev->ops->set_cur_state(cdev, cur_state); | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | return; | |
1158 | } | |
b1569e99 MG |
1159 | /** |
1160 | * thermal_zone_device_update - force an update of a thermal zone's state | |
1161 | * @ttz: the thermal zone to update | |
1162 | */ | |
1163 | ||
1164 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
1165 | { | |
1166 | int count, ret = 0; | |
1167 | long temp, trip_temp; | |
1168 | enum thermal_trip_type trip_type; | |
b1569e99 MG |
1169 | |
1170 | mutex_lock(&tz->lock); | |
1171 | ||
0d288162 MB |
1172 | if (tz->ops->get_temp(tz, &temp)) { |
1173 | /* get_temp failed - retry it later */ | |
c5a01dd5 | 1174 | pr_warn("failed to read out thermal zone %d\n", tz->id); |
0d288162 MB |
1175 | goto leave; |
1176 | } | |
b1569e99 | 1177 | |
601f3d42 ZR |
1178 | tz->last_temperature = tz->temperature; |
1179 | tz->temperature = temp; | |
1180 | ||
b1569e99 MG |
1181 | for (count = 0; count < tz->trips; count++) { |
1182 | tz->ops->get_trip_type(tz, count, &trip_type); | |
1183 | tz->ops->get_trip_temp(tz, count, &trip_temp); | |
1184 | ||
1185 | switch (trip_type) { | |
1186 | case THERMAL_TRIP_CRITICAL: | |
29321357 | 1187 | if (temp >= trip_temp) { |
b1569e99 MG |
1188 | if (tz->ops->notify) |
1189 | ret = tz->ops->notify(tz, count, | |
1190 | trip_type); | |
1191 | if (!ret) { | |
c5a01dd5 JP |
1192 | pr_emerg("Critical temperature reached (%ld C), shutting down\n", |
1193 | temp/1000); | |
b1569e99 MG |
1194 | orderly_poweroff(true); |
1195 | } | |
1196 | } | |
1197 | break; | |
1198 | case THERMAL_TRIP_HOT: | |
29321357 | 1199 | if (temp >= trip_temp) |
b1569e99 MG |
1200 | if (tz->ops->notify) |
1201 | tz->ops->notify(tz, count, trip_type); | |
1202 | break; | |
1203 | case THERMAL_TRIP_ACTIVE: | |
4ae46bef | 1204 | thermal_zone_trip_update(tz, count, temp); |
b1569e99 MG |
1205 | break; |
1206 | case THERMAL_TRIP_PASSIVE: | |
29321357 | 1207 | if (temp >= trip_temp || tz->passive) |
b1569e99 MG |
1208 | thermal_zone_device_passive(tz, temp, |
1209 | trip_temp, count); | |
1210 | break; | |
1211 | } | |
1212 | } | |
03a971a2 MG |
1213 | |
1214 | if (tz->forced_passive) | |
1215 | thermal_zone_device_passive(tz, temp, tz->forced_passive, | |
1216 | THERMAL_TRIPS_NONE); | |
1217 | ||
caca8b80 | 1218 | leave: |
b1569e99 MG |
1219 | if (tz->passive) |
1220 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
1221 | else if (tz->polling_delay) | |
1222 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
3767cb54 FP |
1223 | else |
1224 | thermal_zone_device_set_polling(tz, 0); | |
b1569e99 MG |
1225 | mutex_unlock(&tz->lock); |
1226 | } | |
1227 | EXPORT_SYMBOL(thermal_zone_device_update); | |
1228 | ||
c56f5c03 D |
1229 | /** |
1230 | * create_trip_attrs - create attributes for trip points | |
1231 | * @tz: the thermal zone device | |
1232 | * @mask: Writeable trip point bitmap. | |
1233 | */ | |
1234 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1235 | { | |
1236 | int indx; | |
27365a6c | 1237 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1238 | |
27365a6c | 1239 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1240 | if (!tz->trip_type_attrs) |
1241 | return -ENOMEM; | |
1242 | ||
27365a6c | 1243 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1244 | if (!tz->trip_temp_attrs) { |
1245 | kfree(tz->trip_type_attrs); | |
1246 | return -ENOMEM; | |
1247 | } | |
1248 | ||
27365a6c D |
1249 | if (tz->ops->get_trip_hyst) { |
1250 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1251 | if (!tz->trip_hyst_attrs) { | |
1252 | kfree(tz->trip_type_attrs); | |
1253 | kfree(tz->trip_temp_attrs); | |
1254 | return -ENOMEM; | |
1255 | } | |
1256 | } | |
c56f5c03 | 1257 | |
27365a6c D |
1258 | |
1259 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1260 | /* create trip type attribute */ |
1261 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1262 | "trip_point_%d_type", indx); | |
1263 | ||
1264 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1265 | tz->trip_type_attrs[indx].attr.attr.name = | |
1266 | tz->trip_type_attrs[indx].name; | |
1267 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1268 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1269 | ||
1270 | device_create_file(&tz->device, | |
1271 | &tz->trip_type_attrs[indx].attr); | |
1272 | ||
1273 | /* create trip temp attribute */ | |
1274 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1275 | "trip_point_%d_temp", indx); | |
1276 | ||
1277 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1278 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1279 | tz->trip_temp_attrs[indx].name; | |
1280 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1281 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1282 | if (mask & (1 << indx)) { | |
1283 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1284 | tz->trip_temp_attrs[indx].attr.store = | |
1285 | trip_point_temp_store; | |
1286 | } | |
1287 | ||
1288 | device_create_file(&tz->device, | |
1289 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1290 | |
1291 | /* create Optional trip hyst attribute */ | |
1292 | if (!tz->ops->get_trip_hyst) | |
1293 | continue; | |
1294 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1295 | "trip_point_%d_hyst", indx); | |
1296 | ||
1297 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1298 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1299 | tz->trip_hyst_attrs[indx].name; | |
1300 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1301 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1302 | if (tz->ops->set_trip_hyst) { | |
1303 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1304 | tz->trip_hyst_attrs[indx].attr.store = | |
1305 | trip_point_hyst_store; | |
1306 | } | |
1307 | ||
1308 | device_create_file(&tz->device, | |
1309 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1310 | } |
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1315 | { | |
1316 | int indx; | |
1317 | ||
1318 | for (indx = 0; indx < tz->trips; indx++) { | |
1319 | device_remove_file(&tz->device, | |
1320 | &tz->trip_type_attrs[indx].attr); | |
1321 | device_remove_file(&tz->device, | |
1322 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1323 | if (tz->ops->get_trip_hyst) |
1324 | device_remove_file(&tz->device, | |
1325 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1326 | } |
1327 | kfree(tz->trip_type_attrs); | |
1328 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1329 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1330 | } |
1331 | ||
203d3d4a ZR |
1332 | /** |
1333 | * thermal_zone_device_register - register a new thermal zone device | |
1334 | * @type: the thermal zone device type | |
1335 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1336 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1337 | * @devdata: private device data |
1338 | * @ops: standard thermal zone device callbacks | |
b1569e99 MG |
1339 | * @passive_delay: number of milliseconds to wait between polls when |
1340 | * performing passive cooling | |
1341 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1342 | * whether trip points have been crossed (0 for interrupt | |
1343 | * driven systems) | |
203d3d4a ZR |
1344 | * |
1345 | * thermal_zone_device_unregister() must be called when the device is no | |
1b7ddb84 | 1346 | * longer needed. The passive cooling depends on the .get_trend() return value. |
203d3d4a | 1347 | */ |
4b1bf587 | 1348 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1349 | int trips, int mask, void *devdata, |
5b275ce2 | 1350 | const struct thermal_zone_device_ops *ops, |
1b7ddb84 | 1351 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1352 | { |
1353 | struct thermal_zone_device *tz; | |
1354 | struct thermal_cooling_device *pos; | |
03a971a2 | 1355 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1356 | int result; |
1357 | int count; | |
03a971a2 | 1358 | int passive = 0; |
203d3d4a ZR |
1359 | |
1360 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 1361 | return ERR_PTR(-EINVAL); |
203d3d4a | 1362 | |
c56f5c03 | 1363 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1364 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1365 | |
1366 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1367 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1368 | |
1369 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); | |
1370 | if (!tz) | |
3e6fda5c | 1371 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1372 | |
2d374139 | 1373 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1374 | idr_init(&tz->idr); |
1375 | mutex_init(&tz->lock); | |
1376 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1377 | if (result) { | |
1378 | kfree(tz); | |
3e6fda5c | 1379 | return ERR_PTR(result); |
203d3d4a ZR |
1380 | } |
1381 | ||
1382 | strcpy(tz->type, type); | |
1383 | tz->ops = ops; | |
1384 | tz->device.class = &thermal_class; | |
1385 | tz->devdata = devdata; | |
1386 | tz->trips = trips; | |
b1569e99 MG |
1387 | tz->passive_delay = passive_delay; |
1388 | tz->polling_delay = polling_delay; | |
1389 | ||
354655ea | 1390 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1391 | result = device_register(&tz->device); |
1392 | if (result) { | |
1393 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1394 | kfree(tz); | |
3e6fda5c | 1395 | return ERR_PTR(result); |
203d3d4a ZR |
1396 | } |
1397 | ||
1398 | /* sys I/F */ | |
1399 | if (type) { | |
1400 | result = device_create_file(&tz->device, &dev_attr_type); | |
1401 | if (result) | |
1402 | goto unregister; | |
1403 | } | |
1404 | ||
1405 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1406 | if (result) | |
1407 | goto unregister; | |
1408 | ||
1409 | if (ops->get_mode) { | |
1410 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1411 | if (result) | |
1412 | goto unregister; | |
1413 | } | |
1414 | ||
c56f5c03 D |
1415 | result = create_trip_attrs(tz, mask); |
1416 | if (result) | |
1417 | goto unregister; | |
1418 | ||
203d3d4a | 1419 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1420 | tz->ops->get_trip_type(tz, count, &trip_type); |
1421 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1422 | passive = 1; | |
203d3d4a ZR |
1423 | } |
1424 | ||
03a971a2 MG |
1425 | if (!passive) |
1426 | result = device_create_file(&tz->device, | |
1427 | &dev_attr_passive); | |
1428 | ||
1429 | if (result) | |
1430 | goto unregister; | |
1431 | ||
e68b16ab ZR |
1432 | result = thermal_add_hwmon_sysfs(tz); |
1433 | if (result) | |
1434 | goto unregister; | |
1435 | ||
203d3d4a ZR |
1436 | mutex_lock(&thermal_list_lock); |
1437 | list_add_tail(&tz->node, &thermal_tz_list); | |
1438 | if (ops->bind) | |
1439 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
543a9561 LB |
1440 | result = ops->bind(tz, pos); |
1441 | if (result) | |
1442 | break; | |
203d3d4a ZR |
1443 | } |
1444 | mutex_unlock(&thermal_list_lock); | |
1445 | ||
b1569e99 MG |
1446 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1447 | ||
1448 | thermal_zone_device_update(tz); | |
1449 | ||
203d3d4a ZR |
1450 | if (!result) |
1451 | return tz; | |
1452 | ||
caca8b80 | 1453 | unregister: |
203d3d4a ZR |
1454 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1455 | device_unregister(&tz->device); | |
3e6fda5c | 1456 | return ERR_PTR(result); |
203d3d4a ZR |
1457 | } |
1458 | EXPORT_SYMBOL(thermal_zone_device_register); | |
1459 | ||
1460 | /** | |
1461 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1462 | * @tz: the thermal zone device to remove |
1463 | */ | |
1464 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1465 | { | |
1466 | struct thermal_cooling_device *cdev; | |
1467 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1468 | |
1469 | if (!tz) | |
1470 | return; | |
1471 | ||
1472 | mutex_lock(&thermal_list_lock); | |
1473 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1474 | if (pos == tz) | |
1475 | break; | |
1476 | if (pos != tz) { | |
1477 | /* thermal zone device not found */ | |
1478 | mutex_unlock(&thermal_list_lock); | |
1479 | return; | |
1480 | } | |
1481 | list_del(&tz->node); | |
1482 | if (tz->ops->unbind) | |
1483 | list_for_each_entry(cdev, &thermal_cdev_list, node) | |
1484 | tz->ops->unbind(tz, cdev); | |
1485 | mutex_unlock(&thermal_list_lock); | |
1486 | ||
b1569e99 MG |
1487 | thermal_zone_device_set_polling(tz, 0); |
1488 | ||
203d3d4a ZR |
1489 | if (tz->type[0]) |
1490 | device_remove_file(&tz->device, &dev_attr_type); | |
1491 | device_remove_file(&tz->device, &dev_attr_temp); | |
1492 | if (tz->ops->get_mode) | |
1493 | device_remove_file(&tz->device, &dev_attr_mode); | |
c56f5c03 | 1494 | remove_trip_attrs(tz); |
203d3d4a | 1495 | |
e68b16ab | 1496 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1497 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1498 | idr_destroy(&tz->idr); | |
1499 | mutex_destroy(&tz->lock); | |
1500 | device_unregister(&tz->device); | |
1501 | return; | |
1502 | } | |
1503 | EXPORT_SYMBOL(thermal_zone_device_unregister); | |
1504 | ||
af06216a RW |
1505 | #ifdef CONFIG_NET |
1506 | static struct genl_family thermal_event_genl_family = { | |
1507 | .id = GENL_ID_GENERATE, | |
1508 | .name = THERMAL_GENL_FAMILY_NAME, | |
1509 | .version = THERMAL_GENL_VERSION, | |
1510 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1511 | }; | |
1512 | ||
1513 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1514 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1515 | }; | |
1516 | ||
2d58d7ea | 1517 | int thermal_generate_netlink_event(u32 orig, enum events event) |
4cb18728 D |
1518 | { |
1519 | struct sk_buff *skb; | |
1520 | struct nlattr *attr; | |
1521 | struct thermal_genl_event *thermal_event; | |
1522 | void *msg_header; | |
1523 | int size; | |
1524 | int result; | |
b11de07c | 1525 | static unsigned int thermal_event_seqnum; |
4cb18728 D |
1526 | |
1527 | /* allocate memory */ | |
886ee546 JP |
1528 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1529 | nla_total_size(0); | |
4cb18728 D |
1530 | |
1531 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1532 | if (!skb) | |
1533 | return -ENOMEM; | |
1534 | ||
1535 | /* add the genetlink message header */ | |
1536 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1537 | &thermal_event_genl_family, 0, | |
1538 | THERMAL_GENL_CMD_EVENT); | |
1539 | if (!msg_header) { | |
1540 | nlmsg_free(skb); | |
1541 | return -ENOMEM; | |
1542 | } | |
1543 | ||
1544 | /* fill the data */ | |
886ee546 JP |
1545 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1546 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1547 | |
1548 | if (!attr) { | |
1549 | nlmsg_free(skb); | |
1550 | return -EINVAL; | |
1551 | } | |
1552 | ||
1553 | thermal_event = nla_data(attr); | |
1554 | if (!thermal_event) { | |
1555 | nlmsg_free(skb); | |
1556 | return -EINVAL; | |
1557 | } | |
1558 | ||
1559 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1560 | ||
1561 | thermal_event->orig = orig; | |
1562 | thermal_event->event = event; | |
1563 | ||
1564 | /* send multicast genetlink message */ | |
1565 | result = genlmsg_end(skb, msg_header); | |
1566 | if (result < 0) { | |
1567 | nlmsg_free(skb); | |
1568 | return result; | |
1569 | } | |
1570 | ||
1571 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1572 | if (result) | |
c5a01dd5 | 1573 | pr_info("failed to send netlink event:%d\n", result); |
4cb18728 D |
1574 | |
1575 | return result; | |
1576 | } | |
2d58d7ea | 1577 | EXPORT_SYMBOL(thermal_generate_netlink_event); |
4cb18728 D |
1578 | |
1579 | static int genetlink_init(void) | |
1580 | { | |
1581 | int result; | |
1582 | ||
1583 | result = genl_register_family(&thermal_event_genl_family); | |
1584 | if (result) | |
1585 | return result; | |
1586 | ||
1587 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1588 | &thermal_event_mcgrp); | |
1589 | if (result) | |
1590 | genl_unregister_family(&thermal_event_genl_family); | |
1591 | return result; | |
1592 | } | |
1593 | ||
af06216a RW |
1594 | static void genetlink_exit(void) |
1595 | { | |
1596 | genl_unregister_family(&thermal_event_genl_family); | |
1597 | } | |
1598 | #else /* !CONFIG_NET */ | |
1599 | static inline int genetlink_init(void) { return 0; } | |
1600 | static inline void genetlink_exit(void) {} | |
1601 | #endif /* !CONFIG_NET */ | |
1602 | ||
203d3d4a ZR |
1603 | static int __init thermal_init(void) |
1604 | { | |
1605 | int result = 0; | |
1606 | ||
1607 | result = class_register(&thermal_class); | |
1608 | if (result) { | |
1609 | idr_destroy(&thermal_tz_idr); | |
1610 | idr_destroy(&thermal_cdev_idr); | |
1611 | mutex_destroy(&thermal_idr_lock); | |
1612 | mutex_destroy(&thermal_list_lock); | |
1613 | } | |
4cb18728 | 1614 | result = genetlink_init(); |
203d3d4a ZR |
1615 | return result; |
1616 | } | |
1617 | ||
1618 | static void __exit thermal_exit(void) | |
1619 | { | |
1620 | class_unregister(&thermal_class); | |
1621 | idr_destroy(&thermal_tz_idr); | |
1622 | idr_destroy(&thermal_cdev_idr); | |
1623 | mutex_destroy(&thermal_idr_lock); | |
1624 | mutex_destroy(&thermal_list_lock); | |
4cb18728 | 1625 | genetlink_exit(); |
203d3d4a ZR |
1626 | } |
1627 | ||
4cb18728 | 1628 | fs_initcall(thermal_init); |
203d3d4a | 1629 | module_exit(thermal_exit); |