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 | ||
ce119f83 | 44 | #define THERMAL_NO_TARGET -1UL |
74051ba5 ZR |
45 | /* |
46 | * This structure is used to describe the behavior of | |
47 | * a certain cooling device on a certain trip point | |
48 | * in a certain thermal zone | |
49 | */ | |
b81b6ba3 | 50 | struct thermal_instance { |
203d3d4a ZR |
51 | int id; |
52 | char name[THERMAL_NAME_LENGTH]; | |
53 | struct thermal_zone_device *tz; | |
54 | struct thermal_cooling_device *cdev; | |
55 | int trip; | |
74051ba5 ZR |
56 | unsigned long upper; /* Highest cooling state for this trip point */ |
57 | unsigned long lower; /* Lowest cooling state for this trip point */ | |
ce119f83 | 58 | unsigned long target; /* expected cooling state */ |
203d3d4a ZR |
59 | char attr_name[THERMAL_NAME_LENGTH]; |
60 | struct device_attribute attr; | |
cddf31b3 | 61 | struct list_head tz_node; /* node in tz->thermal_instances */ |
b5e4ae62 | 62 | struct list_head cdev_node; /* node in cdev->thermal_instances */ |
203d3d4a ZR |
63 | }; |
64 | ||
65 | static DEFINE_IDR(thermal_tz_idr); | |
66 | static DEFINE_IDR(thermal_cdev_idr); | |
67 | static DEFINE_MUTEX(thermal_idr_lock); | |
68 | ||
69 | static LIST_HEAD(thermal_tz_list); | |
70 | static LIST_HEAD(thermal_cdev_list); | |
71 | static DEFINE_MUTEX(thermal_list_lock); | |
72 | ||
73 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
74 | { | |
75 | int err; | |
76 | ||
caca8b80 | 77 | again: |
203d3d4a ZR |
78 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) |
79 | return -ENOMEM; | |
80 | ||
81 | if (lock) | |
82 | mutex_lock(lock); | |
83 | err = idr_get_new(idr, NULL, id); | |
84 | if (lock) | |
85 | mutex_unlock(lock); | |
86 | if (unlikely(err == -EAGAIN)) | |
87 | goto again; | |
88 | else if (unlikely(err)) | |
89 | return err; | |
90 | ||
91 | *id = *id & MAX_ID_MASK; | |
92 | return 0; | |
93 | } | |
94 | ||
95 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
96 | { | |
97 | if (lock) | |
98 | mutex_lock(lock); | |
99 | idr_remove(idr, id); | |
100 | if (lock) | |
101 | mutex_unlock(lock); | |
102 | } | |
103 | ||
104 | /* sys I/F for thermal zone */ | |
105 | ||
106 | #define to_thermal_zone(_dev) \ | |
107 | container_of(_dev, struct thermal_zone_device, device) | |
108 | ||
109 | static ssize_t | |
110 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
111 | { | |
112 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
113 | ||
114 | return sprintf(buf, "%s\n", tz->type); | |
115 | } | |
116 | ||
117 | static ssize_t | |
118 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
119 | { | |
120 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
121 | long temperature; |
122 | int ret; | |
203d3d4a ZR |
123 | |
124 | if (!tz->ops->get_temp) | |
125 | return -EPERM; | |
126 | ||
6503e5df MG |
127 | ret = tz->ops->get_temp(tz, &temperature); |
128 | ||
129 | if (ret) | |
130 | return ret; | |
131 | ||
132 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
133 | } |
134 | ||
135 | static ssize_t | |
136 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
137 | { | |
138 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
139 | enum thermal_device_mode mode; |
140 | int result; | |
203d3d4a ZR |
141 | |
142 | if (!tz->ops->get_mode) | |
143 | return -EPERM; | |
144 | ||
6503e5df MG |
145 | result = tz->ops->get_mode(tz, &mode); |
146 | if (result) | |
147 | return result; | |
148 | ||
149 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
150 | : "disabled"); | |
203d3d4a ZR |
151 | } |
152 | ||
153 | static ssize_t | |
154 | mode_store(struct device *dev, struct device_attribute *attr, | |
155 | const char *buf, size_t count) | |
156 | { | |
157 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
158 | int result; | |
159 | ||
160 | if (!tz->ops->set_mode) | |
161 | return -EPERM; | |
162 | ||
f1f0e2ac | 163 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 164 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 165 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
166 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
167 | else | |
168 | result = -EINVAL; | |
169 | ||
203d3d4a ZR |
170 | if (result) |
171 | return result; | |
172 | ||
173 | return count; | |
174 | } | |
175 | ||
176 | static ssize_t | |
177 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
178 | char *buf) | |
179 | { | |
180 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
181 | enum thermal_trip_type type; |
182 | int trip, result; | |
203d3d4a ZR |
183 | |
184 | if (!tz->ops->get_trip_type) | |
185 | return -EPERM; | |
186 | ||
187 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
188 | return -EINVAL; | |
189 | ||
6503e5df MG |
190 | result = tz->ops->get_trip_type(tz, trip, &type); |
191 | if (result) | |
192 | return result; | |
193 | ||
194 | switch (type) { | |
195 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 196 | return sprintf(buf, "critical\n"); |
6503e5df | 197 | case THERMAL_TRIP_HOT: |
625120a4 | 198 | return sprintf(buf, "hot\n"); |
6503e5df | 199 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 200 | return sprintf(buf, "passive\n"); |
6503e5df | 201 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 202 | return sprintf(buf, "active\n"); |
6503e5df | 203 | default: |
625120a4 | 204 | return sprintf(buf, "unknown\n"); |
6503e5df | 205 | } |
203d3d4a ZR |
206 | } |
207 | ||
c56f5c03 D |
208 | static ssize_t |
209 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
210 | const char *buf, size_t count) | |
211 | { | |
212 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
213 | int trip, ret; | |
214 | unsigned long temperature; | |
215 | ||
216 | if (!tz->ops->set_trip_temp) | |
217 | return -EPERM; | |
218 | ||
219 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
220 | return -EINVAL; | |
221 | ||
222 | if (kstrtoul(buf, 10, &temperature)) | |
223 | return -EINVAL; | |
224 | ||
225 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
226 | ||
227 | return ret ? ret : count; | |
228 | } | |
229 | ||
203d3d4a ZR |
230 | static ssize_t |
231 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
232 | char *buf) | |
233 | { | |
234 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
235 | int trip, ret; |
236 | long temperature; | |
203d3d4a ZR |
237 | |
238 | if (!tz->ops->get_trip_temp) | |
239 | return -EPERM; | |
240 | ||
241 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
242 | return -EINVAL; | |
243 | ||
6503e5df MG |
244 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
245 | ||
246 | if (ret) | |
247 | return ret; | |
248 | ||
249 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
250 | } |
251 | ||
27365a6c D |
252 | static ssize_t |
253 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
254 | const char *buf, size_t count) | |
255 | { | |
256 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
257 | int trip, ret; | |
258 | unsigned long temperature; | |
259 | ||
260 | if (!tz->ops->set_trip_hyst) | |
261 | return -EPERM; | |
262 | ||
263 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
264 | return -EINVAL; | |
265 | ||
266 | if (kstrtoul(buf, 10, &temperature)) | |
267 | return -EINVAL; | |
268 | ||
269 | /* | |
270 | * We are not doing any check on the 'temperature' value | |
271 | * here. The driver implementing 'set_trip_hyst' has to | |
272 | * take care of this. | |
273 | */ | |
274 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
275 | ||
276 | return ret ? ret : count; | |
277 | } | |
278 | ||
279 | static ssize_t | |
280 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
281 | char *buf) | |
282 | { | |
283 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
284 | int trip, ret; | |
285 | unsigned long temperature; | |
286 | ||
287 | if (!tz->ops->get_trip_hyst) | |
288 | return -EPERM; | |
289 | ||
290 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
291 | return -EINVAL; | |
292 | ||
293 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
294 | ||
295 | return ret ? ret : sprintf(buf, "%ld\n", temperature); | |
296 | } | |
297 | ||
03a971a2 MG |
298 | static ssize_t |
299 | passive_store(struct device *dev, struct device_attribute *attr, | |
300 | const char *buf, size_t count) | |
301 | { | |
302 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
303 | struct thermal_cooling_device *cdev = NULL; | |
304 | int state; | |
305 | ||
306 | if (!sscanf(buf, "%d\n", &state)) | |
307 | return -EINVAL; | |
308 | ||
3d8e3ad8 FP |
309 | /* sanity check: values below 1000 millicelcius don't make sense |
310 | * and can cause the system to go into a thermal heart attack | |
311 | */ | |
312 | if (state && state < 1000) | |
313 | return -EINVAL; | |
314 | ||
03a971a2 MG |
315 | if (state && !tz->forced_passive) { |
316 | mutex_lock(&thermal_list_lock); | |
317 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
318 | if (!strncmp("Processor", cdev->type, | |
319 | sizeof("Processor"))) | |
320 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
321 | THERMAL_TRIPS_NONE, cdev, |
322 | THERMAL_NO_LIMIT, | |
323 | THERMAL_NO_LIMIT); | |
03a971a2 MG |
324 | } |
325 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
326 | if (!tz->passive_delay) |
327 | tz->passive_delay = 1000; | |
03a971a2 MG |
328 | } else if (!state && tz->forced_passive) { |
329 | mutex_lock(&thermal_list_lock); | |
330 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
331 | if (!strncmp("Processor", cdev->type, | |
332 | sizeof("Processor"))) | |
333 | thermal_zone_unbind_cooling_device(tz, | |
334 | THERMAL_TRIPS_NONE, | |
335 | cdev); | |
336 | } | |
337 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 338 | tz->passive_delay = 0; |
03a971a2 MG |
339 | } |
340 | ||
03a971a2 MG |
341 | tz->forced_passive = state; |
342 | ||
343 | thermal_zone_device_update(tz); | |
344 | ||
345 | return count; | |
346 | } | |
347 | ||
348 | static ssize_t | |
349 | passive_show(struct device *dev, struct device_attribute *attr, | |
350 | char *buf) | |
351 | { | |
352 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
353 | ||
354 | return sprintf(buf, "%d\n", tz->forced_passive); | |
355 | } | |
356 | ||
203d3d4a ZR |
357 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
358 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
359 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 360 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
203d3d4a | 361 | |
203d3d4a ZR |
362 | /* sys I/F for cooling device */ |
363 | #define to_cooling_device(_dev) \ | |
364 | container_of(_dev, struct thermal_cooling_device, device) | |
365 | ||
366 | static ssize_t | |
367 | thermal_cooling_device_type_show(struct device *dev, | |
368 | struct device_attribute *attr, char *buf) | |
369 | { | |
370 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
371 | ||
372 | return sprintf(buf, "%s\n", cdev->type); | |
373 | } | |
374 | ||
375 | static ssize_t | |
376 | thermal_cooling_device_max_state_show(struct device *dev, | |
377 | struct device_attribute *attr, char *buf) | |
378 | { | |
379 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
380 | unsigned long state; |
381 | int ret; | |
203d3d4a | 382 | |
6503e5df MG |
383 | ret = cdev->ops->get_max_state(cdev, &state); |
384 | if (ret) | |
385 | return ret; | |
386 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
387 | } |
388 | ||
389 | static ssize_t | |
390 | thermal_cooling_device_cur_state_show(struct device *dev, | |
391 | struct device_attribute *attr, char *buf) | |
392 | { | |
393 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
394 | unsigned long state; |
395 | int ret; | |
203d3d4a | 396 | |
6503e5df MG |
397 | ret = cdev->ops->get_cur_state(cdev, &state); |
398 | if (ret) | |
399 | return ret; | |
400 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
401 | } |
402 | ||
403 | static ssize_t | |
404 | thermal_cooling_device_cur_state_store(struct device *dev, | |
405 | struct device_attribute *attr, | |
406 | const char *buf, size_t count) | |
407 | { | |
408 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 409 | unsigned long state; |
203d3d4a ZR |
410 | int result; |
411 | ||
6503e5df | 412 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
413 | return -EINVAL; |
414 | ||
edb94918 | 415 | if ((long)state < 0) |
203d3d4a ZR |
416 | return -EINVAL; |
417 | ||
418 | result = cdev->ops->set_cur_state(cdev, state); | |
419 | if (result) | |
420 | return result; | |
421 | return count; | |
422 | } | |
423 | ||
424 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 425 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
426 | static DEVICE_ATTR(max_state, 0444, |
427 | thermal_cooling_device_max_state_show, NULL); | |
428 | static DEVICE_ATTR(cur_state, 0644, | |
429 | thermal_cooling_device_cur_state_show, | |
430 | thermal_cooling_device_cur_state_store); | |
431 | ||
432 | static ssize_t | |
433 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 434 | struct device_attribute *attr, char *buf) |
203d3d4a | 435 | { |
b81b6ba3 | 436 | struct thermal_instance *instance; |
203d3d4a ZR |
437 | |
438 | instance = | |
b81b6ba3 | 439 | container_of(attr, struct thermal_instance, attr); |
203d3d4a ZR |
440 | |
441 | if (instance->trip == THERMAL_TRIPS_NONE) | |
442 | return sprintf(buf, "-1\n"); | |
443 | else | |
444 | return sprintf(buf, "%d\n", instance->trip); | |
445 | } | |
446 | ||
447 | /* Device management */ | |
448 | ||
16d75239 RH |
449 | #if defined(CONFIG_THERMAL_HWMON) |
450 | ||
e68b16ab ZR |
451 | /* hwmon sys I/F */ |
452 | #include <linux/hwmon.h> | |
31f5396a JD |
453 | |
454 | /* thermal zone devices with the same type share one hwmon device */ | |
455 | struct thermal_hwmon_device { | |
456 | char type[THERMAL_NAME_LENGTH]; | |
457 | struct device *device; | |
458 | int count; | |
459 | struct list_head tz_list; | |
460 | struct list_head node; | |
461 | }; | |
462 | ||
463 | struct thermal_hwmon_attr { | |
464 | struct device_attribute attr; | |
465 | char name[16]; | |
466 | }; | |
467 | ||
468 | /* one temperature input for each thermal zone */ | |
469 | struct thermal_hwmon_temp { | |
470 | struct list_head hwmon_node; | |
471 | struct thermal_zone_device *tz; | |
472 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
473 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
474 | }; | |
475 | ||
e68b16ab ZR |
476 | static LIST_HEAD(thermal_hwmon_list); |
477 | ||
478 | static ssize_t | |
479 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
480 | { | |
0e968a3b | 481 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
482 | return sprintf(buf, "%s\n", hwmon->type); |
483 | } | |
484 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
485 | ||
486 | static ssize_t | |
487 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
488 | { | |
6503e5df MG |
489 | long temperature; |
490 | int ret; | |
e68b16ab ZR |
491 | struct thermal_hwmon_attr *hwmon_attr |
492 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
493 | struct thermal_hwmon_temp *temp |
494 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 495 | temp_input); |
31f5396a | 496 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 497 | |
6503e5df MG |
498 | ret = tz->ops->get_temp(tz, &temperature); |
499 | ||
500 | if (ret) | |
501 | return ret; | |
502 | ||
503 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
504 | } |
505 | ||
506 | static ssize_t | |
507 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
508 | char *buf) | |
509 | { | |
510 | struct thermal_hwmon_attr *hwmon_attr | |
511 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
512 | struct thermal_hwmon_temp *temp |
513 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 514 | temp_crit); |
31f5396a | 515 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
516 | long temperature; |
517 | int ret; | |
518 | ||
519 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
520 | if (ret) | |
521 | return ret; | |
e68b16ab | 522 | |
6503e5df | 523 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
524 | } |
525 | ||
526 | ||
0d97d7a4 JD |
527 | static struct thermal_hwmon_device * |
528 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
529 | { |
530 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
531 | |
532 | mutex_lock(&thermal_list_lock); | |
533 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
534 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 535 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 536 | return hwmon; |
e68b16ab ZR |
537 | } |
538 | mutex_unlock(&thermal_list_lock); | |
539 | ||
0d97d7a4 JD |
540 | return NULL; |
541 | } | |
542 | ||
31f5396a JD |
543 | /* Find the temperature input matching a given thermal zone */ |
544 | static struct thermal_hwmon_temp * | |
545 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
546 | const struct thermal_zone_device *tz) | |
547 | { | |
548 | struct thermal_hwmon_temp *temp; | |
549 | ||
550 | mutex_lock(&thermal_list_lock); | |
551 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
552 | if (temp->tz == tz) { | |
553 | mutex_unlock(&thermal_list_lock); | |
554 | return temp; | |
555 | } | |
556 | mutex_unlock(&thermal_list_lock); | |
557 | ||
558 | return NULL; | |
559 | } | |
560 | ||
0d97d7a4 JD |
561 | static int |
562 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
563 | { | |
564 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 565 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
566 | int new_hwmon_device = 1; |
567 | int result; | |
568 | ||
569 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
570 | if (hwmon) { | |
571 | new_hwmon_device = 0; | |
572 | goto register_sys_interface; | |
573 | } | |
574 | ||
e68b16ab ZR |
575 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
576 | if (!hwmon) | |
577 | return -ENOMEM; | |
578 | ||
579 | INIT_LIST_HEAD(&hwmon->tz_list); | |
580 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
581 | hwmon->device = hwmon_device_register(NULL); | |
582 | if (IS_ERR(hwmon->device)) { | |
583 | result = PTR_ERR(hwmon->device); | |
584 | goto free_mem; | |
585 | } | |
0e968a3b | 586 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
587 | result = device_create_file(hwmon->device, &dev_attr_name); |
588 | if (result) | |
b299eb5c | 589 | goto free_mem; |
e68b16ab ZR |
590 | |
591 | register_sys_interface: | |
31f5396a JD |
592 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
593 | if (!temp) { | |
594 | result = -ENOMEM; | |
595 | goto unregister_name; | |
596 | } | |
597 | ||
598 | temp->tz = tz; | |
e68b16ab ZR |
599 | hwmon->count++; |
600 | ||
31f5396a | 601 | snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH, |
e68b16ab | 602 | "temp%d_input", hwmon->count); |
31f5396a JD |
603 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
604 | temp->temp_input.attr.attr.mode = 0444; | |
605 | temp->temp_input.attr.show = temp_input_show; | |
606 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
607 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 608 | if (result) |
31f5396a | 609 | goto free_temp_mem; |
e68b16ab ZR |
610 | |
611 | if (tz->ops->get_crit_temp) { | |
612 | unsigned long temperature; | |
613 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
31f5396a | 614 | snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH, |
e68b16ab | 615 | "temp%d_crit", hwmon->count); |
31f5396a JD |
616 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
617 | temp->temp_crit.attr.attr.mode = 0444; | |
618 | temp->temp_crit.attr.show = temp_crit_show; | |
619 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 620 | result = device_create_file(hwmon->device, |
31f5396a | 621 | &temp->temp_crit.attr); |
e68b16ab | 622 | if (result) |
b299eb5c | 623 | goto unregister_input; |
e68b16ab ZR |
624 | } |
625 | } | |
626 | ||
627 | mutex_lock(&thermal_list_lock); | |
628 | if (new_hwmon_device) | |
629 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 630 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
631 | mutex_unlock(&thermal_list_lock); |
632 | ||
633 | return 0; | |
634 | ||
b299eb5c | 635 | unregister_input: |
31f5396a JD |
636 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
637 | free_temp_mem: | |
638 | kfree(temp); | |
b299eb5c | 639 | unregister_name: |
e68b16ab ZR |
640 | if (new_hwmon_device) { |
641 | device_remove_file(hwmon->device, &dev_attr_name); | |
642 | hwmon_device_unregister(hwmon->device); | |
643 | } | |
644 | free_mem: | |
645 | if (new_hwmon_device) | |
646 | kfree(hwmon); | |
647 | ||
648 | return result; | |
649 | } | |
650 | ||
651 | static void | |
652 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
653 | { | |
31f5396a JD |
654 | struct thermal_hwmon_device *hwmon; |
655 | struct thermal_hwmon_temp *temp; | |
656 | ||
657 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
658 | if (unlikely(!hwmon)) { | |
659 | /* Should never happen... */ | |
660 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
661 | return; | |
662 | } | |
663 | ||
664 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
665 | if (unlikely(!temp)) { | |
666 | /* Should never happen... */ | |
667 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
668 | return; | |
669 | } | |
e68b16ab | 670 | |
31f5396a | 671 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 672 | if (tz->ops->get_crit_temp) |
31f5396a | 673 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
674 | |
675 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
676 | list_del(&temp->hwmon_node); |
677 | kfree(temp); | |
e68b16ab ZR |
678 | if (!list_empty(&hwmon->tz_list)) { |
679 | mutex_unlock(&thermal_list_lock); | |
680 | return; | |
681 | } | |
682 | list_del(&hwmon->node); | |
683 | mutex_unlock(&thermal_list_lock); | |
684 | ||
685 | device_remove_file(hwmon->device, &dev_attr_name); | |
686 | hwmon_device_unregister(hwmon->device); | |
687 | kfree(hwmon); | |
688 | } | |
689 | #else | |
690 | static int | |
691 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
692 | { | |
693 | return 0; | |
694 | } | |
695 | ||
696 | static void | |
697 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
698 | { | |
699 | } | |
700 | #endif | |
701 | ||
b1569e99 MG |
702 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
703 | int delay) | |
704 | { | |
705 | cancel_delayed_work(&(tz->poll_queue)); | |
706 | ||
707 | if (!delay) | |
708 | return; | |
709 | ||
710 | if (delay > 1000) | |
51e20d0e | 711 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
712 | round_jiffies(msecs_to_jiffies(delay))); |
713 | else | |
51e20d0e | 714 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
715 | msecs_to_jiffies(delay)); |
716 | } | |
717 | ||
718 | static void thermal_zone_device_passive(struct thermal_zone_device *tz, | |
719 | int temp, int trip_temp, int trip) | |
720 | { | |
1b7ddb84 | 721 | enum thermal_trend trend; |
b81b6ba3 | 722 | struct thermal_instance *instance; |
b1569e99 MG |
723 | struct thermal_cooling_device *cdev; |
724 | long state, max_state; | |
725 | ||
1b7ddb84 | 726 | if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { |
601f3d42 ZR |
727 | /* |
728 | * compare the current temperature and previous temperature | |
729 | * to get the thermal trend, if no special requirement | |
730 | */ | |
731 | if (tz->temperature > tz->last_temperature) | |
732 | trend = THERMAL_TREND_RAISING; | |
733 | else if (tz->temperature < tz->last_temperature) | |
734 | trend = THERMAL_TREND_DROPPING; | |
735 | else | |
736 | trend = THERMAL_TREND_STABLE; | |
737 | } | |
738 | ||
b1569e99 MG |
739 | /* |
740 | * Above Trip? | |
741 | * ----------- | |
742 | * Calculate the thermal trend (using the passive cooling equation) | |
743 | * and modify the performance limit for all passive cooling devices | |
744 | * accordingly. Note that we assume symmetry. | |
745 | */ | |
746 | if (temp >= trip_temp) { | |
747 | tz->passive = true; | |
748 | ||
b1569e99 | 749 | /* Heating up? */ |
1b7ddb84 | 750 | if (trend == THERMAL_TREND_RAISING) { |
2d374139 | 751 | list_for_each_entry(instance, &tz->thermal_instances, |
cddf31b3 | 752 | tz_node) { |
b1569e99 MG |
753 | if (instance->trip != trip) |
754 | continue; | |
755 | cdev = instance->cdev; | |
756 | cdev->ops->get_cur_state(cdev, &state); | |
757 | cdev->ops->get_max_state(cdev, &max_state); | |
758 | if (state++ < max_state) | |
759 | cdev->ops->set_cur_state(cdev, state); | |
760 | } | |
1b7ddb84 | 761 | } else if (trend == THERMAL_TREND_DROPPING) { /* Cooling off? */ |
2d374139 | 762 | list_for_each_entry(instance, &tz->thermal_instances, |
cddf31b3 | 763 | tz_node) { |
b1569e99 MG |
764 | if (instance->trip != trip) |
765 | continue; | |
766 | cdev = instance->cdev; | |
767 | cdev->ops->get_cur_state(cdev, &state); | |
768 | cdev->ops->get_max_state(cdev, &max_state); | |
769 | if (state > 0) | |
770 | cdev->ops->set_cur_state(cdev, --state); | |
771 | } | |
772 | } | |
773 | return; | |
774 | } | |
775 | ||
776 | /* | |
777 | * Below Trip? | |
778 | * ----------- | |
779 | * Implement passive cooling hysteresis to slowly increase performance | |
780 | * and avoid thrashing around the passive trip point. Note that we | |
781 | * assume symmetry. | |
782 | */ | |
cddf31b3 | 783 | list_for_each_entry(instance, &tz->thermal_instances, tz_node) { |
b1569e99 MG |
784 | if (instance->trip != trip) |
785 | continue; | |
786 | cdev = instance->cdev; | |
787 | cdev->ops->get_cur_state(cdev, &state); | |
788 | cdev->ops->get_max_state(cdev, &max_state); | |
789 | if (state > 0) | |
790 | cdev->ops->set_cur_state(cdev, --state); | |
791 | if (state == 0) | |
792 | tz->passive = false; | |
793 | } | |
794 | } | |
795 | ||
796 | static void thermal_zone_device_check(struct work_struct *work) | |
797 | { | |
798 | struct thermal_zone_device *tz = container_of(work, struct | |
799 | thermal_zone_device, | |
800 | poll_queue.work); | |
801 | thermal_zone_device_update(tz); | |
802 | } | |
e68b16ab | 803 | |
203d3d4a ZR |
804 | /** |
805 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
806 | * @tz: thermal zone device |
807 | * @trip: indicates which trip point the cooling devices is | |
808 | * associated with in this thermal zone. | |
809 | * @cdev: thermal cooling device | |
543a9561 LB |
810 | * |
811 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
812 | */ |
813 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
814 | int trip, | |
9d99842f ZR |
815 | struct thermal_cooling_device *cdev, |
816 | unsigned long upper, unsigned long lower) | |
203d3d4a | 817 | { |
b81b6ba3 ZR |
818 | struct thermal_instance *dev; |
819 | struct thermal_instance *pos; | |
c7516709 TS |
820 | struct thermal_zone_device *pos1; |
821 | struct thermal_cooling_device *pos2; | |
74051ba5 | 822 | unsigned long max_state; |
203d3d4a ZR |
823 | int result; |
824 | ||
543a9561 | 825 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
826 | return -EINVAL; |
827 | ||
c7516709 TS |
828 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
829 | if (pos1 == tz) | |
830 | break; | |
831 | } | |
832 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
833 | if (pos2 == cdev) | |
834 | break; | |
835 | } | |
836 | ||
837 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
838 | return -EINVAL; |
839 | ||
9d99842f ZR |
840 | cdev->ops->get_max_state(cdev, &max_state); |
841 | ||
842 | /* lower default 0, upper default max_state */ | |
843 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
844 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
845 | ||
846 | if (lower > upper || upper > max_state) | |
847 | return -EINVAL; | |
848 | ||
203d3d4a | 849 | dev = |
b81b6ba3 | 850 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
851 | if (!dev) |
852 | return -ENOMEM; | |
853 | dev->tz = tz; | |
854 | dev->cdev = cdev; | |
855 | dev->trip = trip; | |
9d99842f ZR |
856 | dev->upper = upper; |
857 | dev->lower = lower; | |
ce119f83 | 858 | dev->target = THERMAL_NO_TARGET; |
74051ba5 | 859 | |
203d3d4a ZR |
860 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
861 | if (result) | |
862 | goto free_mem; | |
863 | ||
864 | sprintf(dev->name, "cdev%d", dev->id); | |
865 | result = | |
866 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
867 | if (result) | |
868 | goto release_idr; | |
869 | ||
870 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 871 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
872 | dev->attr.attr.name = dev->attr_name; |
873 | dev->attr.attr.mode = 0444; | |
874 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
875 | result = device_create_file(&tz->device, &dev->attr); | |
876 | if (result) | |
877 | goto remove_symbol_link; | |
878 | ||
879 | mutex_lock(&tz->lock); | |
cddf31b3 | 880 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
881 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
882 | result = -EEXIST; | |
883 | break; | |
884 | } | |
b5e4ae62 | 885 | if (!result) { |
cddf31b3 | 886 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 ZR |
887 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
888 | } | |
203d3d4a ZR |
889 | mutex_unlock(&tz->lock); |
890 | ||
891 | if (!result) | |
892 | return 0; | |
893 | ||
894 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 895 | remove_symbol_link: |
203d3d4a | 896 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 897 | release_idr: |
203d3d4a | 898 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 899 | free_mem: |
203d3d4a ZR |
900 | kfree(dev); |
901 | return result; | |
902 | } | |
903 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); | |
904 | ||
905 | /** | |
906 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
907 | * @tz: thermal zone device |
908 | * @trip: indicates which trip point the cooling devices is | |
909 | * associated with in this thermal zone. | |
910 | * @cdev: thermal cooling device | |
543a9561 LB |
911 | * |
912 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
913 | */ |
914 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
915 | int trip, | |
916 | struct thermal_cooling_device *cdev) | |
917 | { | |
b81b6ba3 | 918 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
919 | |
920 | mutex_lock(&tz->lock); | |
cddf31b3 | 921 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 922 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 923 | list_del(&pos->tz_node); |
b5e4ae62 | 924 | list_del(&pos->cdev_node); |
203d3d4a ZR |
925 | mutex_unlock(&tz->lock); |
926 | goto unbind; | |
927 | } | |
928 | } | |
929 | mutex_unlock(&tz->lock); | |
930 | ||
931 | return -ENODEV; | |
932 | ||
caca8b80 | 933 | unbind: |
203d3d4a ZR |
934 | device_remove_file(&tz->device, &pos->attr); |
935 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
936 | release_idr(&tz->idr, &tz->lock, pos->id); | |
937 | kfree(pos); | |
938 | return 0; | |
939 | } | |
940 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); | |
941 | ||
942 | static void thermal_release(struct device *dev) | |
943 | { | |
944 | struct thermal_zone_device *tz; | |
945 | struct thermal_cooling_device *cdev; | |
946 | ||
caca8b80 JP |
947 | if (!strncmp(dev_name(dev), "thermal_zone", |
948 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
949 | tz = to_thermal_zone(dev); |
950 | kfree(tz); | |
951 | } else { | |
952 | cdev = to_cooling_device(dev); | |
953 | kfree(cdev); | |
954 | } | |
955 | } | |
956 | ||
957 | static struct class thermal_class = { | |
958 | .name = "thermal", | |
959 | .dev_release = thermal_release, | |
960 | }; | |
961 | ||
962 | /** | |
963 | * thermal_cooling_device_register - register a new thermal cooling device | |
964 | * @type: the thermal cooling device type. | |
965 | * @devdata: device private data. | |
966 | * @ops: standard thermal cooling devices callbacks. | |
967 | */ | |
caca8b80 JP |
968 | struct thermal_cooling_device * |
969 | thermal_cooling_device_register(char *type, void *devdata, | |
970 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
971 | { |
972 | struct thermal_cooling_device *cdev; | |
973 | struct thermal_zone_device *pos; | |
974 | int result; | |
975 | ||
976 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 977 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
978 | |
979 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 980 | !ops->set_cur_state) |
3e6fda5c | 981 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
982 | |
983 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
984 | if (!cdev) | |
3e6fda5c | 985 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
986 | |
987 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
988 | if (result) { | |
989 | kfree(cdev); | |
3e6fda5c | 990 | return ERR_PTR(result); |
203d3d4a ZR |
991 | } |
992 | ||
993 | strcpy(cdev->type, type); | |
b5e4ae62 | 994 | INIT_LIST_HEAD(&cdev->thermal_instances); |
203d3d4a | 995 | cdev->ops = ops; |
ce119f83 | 996 | cdev->updated = true; |
203d3d4a ZR |
997 | cdev->device.class = &thermal_class; |
998 | cdev->devdata = devdata; | |
354655ea | 999 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
1000 | result = device_register(&cdev->device); |
1001 | if (result) { | |
1002 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1003 | kfree(cdev); | |
3e6fda5c | 1004 | return ERR_PTR(result); |
203d3d4a ZR |
1005 | } |
1006 | ||
1007 | /* sys I/F */ | |
1008 | if (type) { | |
543a9561 | 1009 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1010 | if (result) |
1011 | goto unregister; | |
1012 | } | |
1013 | ||
1014 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
1015 | if (result) | |
1016 | goto unregister; | |
1017 | ||
1018 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
1019 | if (result) | |
1020 | goto unregister; | |
1021 | ||
1022 | mutex_lock(&thermal_list_lock); | |
1023 | list_add(&cdev->node, &thermal_cdev_list); | |
1024 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
1025 | if (!pos->ops->bind) | |
1026 | continue; | |
1027 | result = pos->ops->bind(pos, cdev); | |
1028 | if (result) | |
1029 | break; | |
1030 | ||
1031 | } | |
1032 | mutex_unlock(&thermal_list_lock); | |
1033 | ||
1034 | if (!result) | |
1035 | return cdev; | |
1036 | ||
caca8b80 | 1037 | unregister: |
203d3d4a ZR |
1038 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1039 | device_unregister(&cdev->device); | |
3e6fda5c | 1040 | return ERR_PTR(result); |
203d3d4a ZR |
1041 | } |
1042 | EXPORT_SYMBOL(thermal_cooling_device_register); | |
1043 | ||
1044 | /** | |
1045 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1046 | * @cdev: the thermal cooling device to remove. |
1047 | * | |
1048 | * thermal_cooling_device_unregister() must be called when the device is no | |
1049 | * longer needed. | |
1050 | */ | |
1051 | void thermal_cooling_device_unregister(struct | |
1052 | thermal_cooling_device | |
1053 | *cdev) | |
1054 | { | |
1055 | struct thermal_zone_device *tz; | |
1056 | struct thermal_cooling_device *pos = NULL; | |
1057 | ||
1058 | if (!cdev) | |
1059 | return; | |
1060 | ||
1061 | mutex_lock(&thermal_list_lock); | |
1062 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1063 | if (pos == cdev) | |
1064 | break; | |
1065 | if (pos != cdev) { | |
1066 | /* thermal cooling device not found */ | |
1067 | mutex_unlock(&thermal_list_lock); | |
1068 | return; | |
1069 | } | |
1070 | list_del(&cdev->node); | |
1071 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1072 | if (!tz->ops->unbind) | |
1073 | continue; | |
1074 | tz->ops->unbind(tz, cdev); | |
1075 | } | |
1076 | mutex_unlock(&thermal_list_lock); | |
1077 | if (cdev->type[0]) | |
543a9561 | 1078 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1079 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1080 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1081 | ||
1082 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1083 | device_unregister(&cdev->device); | |
1084 | return; | |
1085 | } | |
1086 | EXPORT_SYMBOL(thermal_cooling_device_unregister); | |
1087 | ||
ce119f83 ZR |
1088 | static void thermal_cdev_do_update(struct thermal_cooling_device *cdev) |
1089 | { | |
1090 | struct thermal_instance *instance; | |
1091 | unsigned long target = 0; | |
1092 | ||
1093 | /* cooling device is updated*/ | |
1094 | if (cdev->updated) | |
1095 | return; | |
1096 | ||
1097 | /* Make sure cdev enters the deepest cooling state */ | |
1098 | list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { | |
1099 | if (instance->target == THERMAL_NO_TARGET) | |
1100 | continue; | |
1101 | if (instance->target > target) | |
1102 | target = instance->target; | |
1103 | } | |
1104 | cdev->ops->set_cur_state(cdev, target); | |
1105 | cdev->updated = true; | |
1106 | } | |
1107 | ||
1108 | static void thermal_zone_do_update(struct thermal_zone_device *tz) | |
1109 | { | |
1110 | struct thermal_instance *instance; | |
1111 | ||
1112 | list_for_each_entry(instance, &tz->thermal_instances, tz_node) | |
1113 | thermal_cdev_do_update(instance->cdev); | |
1114 | } | |
1115 | ||
4ae46bef ZR |
1116 | /* |
1117 | * Cooling algorithm for active trip points | |
1118 | * | |
1119 | * 1. if the temperature is higher than a trip point, | |
1120 | * a. if the trend is THERMAL_TREND_RAISING, use higher cooling | |
1121 | * state for this trip point | |
1122 | * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling | |
1123 | * state for this trip point | |
1124 | * | |
1125 | * 2. if the temperature is lower than a trip point, use lower | |
1126 | * cooling state for this trip point | |
1127 | * | |
1128 | * Note that this behaves the same as the previous passive cooling | |
1129 | * algorithm. | |
1130 | */ | |
1131 | ||
1132 | static void thermal_zone_trip_update(struct thermal_zone_device *tz, | |
1133 | int trip, long temp) | |
1134 | { | |
b81b6ba3 | 1135 | struct thermal_instance *instance; |
4ae46bef ZR |
1136 | struct thermal_cooling_device *cdev = NULL; |
1137 | unsigned long cur_state, max_state; | |
1138 | long trip_temp; | |
1139 | enum thermal_trend trend; | |
1140 | ||
1141 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
1142 | ||
1143 | if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { | |
1144 | /* | |
1145 | * compare the current temperature and previous temperature | |
1146 | * to get the thermal trend, if no special requirement | |
1147 | */ | |
1148 | if (tz->temperature > tz->last_temperature) | |
1149 | trend = THERMAL_TREND_RAISING; | |
1150 | else if (tz->temperature < tz->last_temperature) | |
1151 | trend = THERMAL_TREND_DROPPING; | |
1152 | else | |
1153 | trend = THERMAL_TREND_STABLE; | |
1154 | } | |
1155 | ||
1156 | if (temp >= trip_temp) { | |
cddf31b3 | 1157 | list_for_each_entry(instance, &tz->thermal_instances, tz_node) { |
4ae46bef ZR |
1158 | if (instance->trip != trip) |
1159 | continue; | |
1160 | ||
1161 | cdev = instance->cdev; | |
1162 | ||
1163 | cdev->ops->get_cur_state(cdev, &cur_state); | |
1164 | cdev->ops->get_max_state(cdev, &max_state); | |
1165 | ||
1166 | if (trend == THERMAL_TREND_RAISING) { | |
1167 | cur_state = cur_state < instance->upper ? | |
1168 | (cur_state + 1) : instance->upper; | |
1169 | } else if (trend == THERMAL_TREND_DROPPING) { | |
1170 | cur_state = cur_state > instance->lower ? | |
1171 | (cur_state - 1) : instance->lower; | |
1172 | } | |
ce119f83 ZR |
1173 | instance->target = cur_state; |
1174 | cdev->updated = false; /* cooling device needs update */ | |
4ae46bef ZR |
1175 | } |
1176 | } else { /* below trip */ | |
cddf31b3 | 1177 | list_for_each_entry(instance, &tz->thermal_instances, tz_node) { |
4ae46bef ZR |
1178 | if (instance->trip != trip) |
1179 | continue; | |
1180 | ||
ce119f83 ZR |
1181 | /* Do not use the inactive thermal instance */ |
1182 | if (instance->target == THERMAL_NO_TARGET) | |
1183 | continue; | |
4ae46bef ZR |
1184 | cdev = instance->cdev; |
1185 | cdev->ops->get_cur_state(cdev, &cur_state); | |
1186 | ||
1187 | cur_state = cur_state > instance->lower ? | |
ce119f83 ZR |
1188 | (cur_state - 1) : THERMAL_NO_TARGET; |
1189 | instance->target = cur_state; | |
1190 | cdev->updated = false; /* cooling device needs update */ | |
4ae46bef ZR |
1191 | } |
1192 | } | |
1193 | ||
1194 | return; | |
1195 | } | |
b1569e99 MG |
1196 | /** |
1197 | * thermal_zone_device_update - force an update of a thermal zone's state | |
1198 | * @ttz: the thermal zone to update | |
1199 | */ | |
1200 | ||
1201 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
1202 | { | |
1203 | int count, ret = 0; | |
1204 | long temp, trip_temp; | |
1205 | enum thermal_trip_type trip_type; | |
b1569e99 MG |
1206 | |
1207 | mutex_lock(&tz->lock); | |
1208 | ||
0d288162 MB |
1209 | if (tz->ops->get_temp(tz, &temp)) { |
1210 | /* get_temp failed - retry it later */ | |
c5a01dd5 | 1211 | pr_warn("failed to read out thermal zone %d\n", tz->id); |
0d288162 MB |
1212 | goto leave; |
1213 | } | |
b1569e99 | 1214 | |
601f3d42 ZR |
1215 | tz->last_temperature = tz->temperature; |
1216 | tz->temperature = temp; | |
1217 | ||
b1569e99 MG |
1218 | for (count = 0; count < tz->trips; count++) { |
1219 | tz->ops->get_trip_type(tz, count, &trip_type); | |
1220 | tz->ops->get_trip_temp(tz, count, &trip_temp); | |
1221 | ||
1222 | switch (trip_type) { | |
1223 | case THERMAL_TRIP_CRITICAL: | |
29321357 | 1224 | if (temp >= trip_temp) { |
b1569e99 MG |
1225 | if (tz->ops->notify) |
1226 | ret = tz->ops->notify(tz, count, | |
1227 | trip_type); | |
1228 | if (!ret) { | |
c5a01dd5 JP |
1229 | pr_emerg("Critical temperature reached (%ld C), shutting down\n", |
1230 | temp/1000); | |
b1569e99 MG |
1231 | orderly_poweroff(true); |
1232 | } | |
1233 | } | |
1234 | break; | |
1235 | case THERMAL_TRIP_HOT: | |
29321357 | 1236 | if (temp >= trip_temp) |
b1569e99 MG |
1237 | if (tz->ops->notify) |
1238 | tz->ops->notify(tz, count, trip_type); | |
1239 | break; | |
1240 | case THERMAL_TRIP_ACTIVE: | |
4ae46bef | 1241 | thermal_zone_trip_update(tz, count, temp); |
b1569e99 MG |
1242 | break; |
1243 | case THERMAL_TRIP_PASSIVE: | |
29321357 | 1244 | if (temp >= trip_temp || tz->passive) |
b1569e99 MG |
1245 | thermal_zone_device_passive(tz, temp, |
1246 | trip_temp, count); | |
1247 | break; | |
1248 | } | |
1249 | } | |
03a971a2 | 1250 | |
ce119f83 | 1251 | thermal_zone_do_update(tz); |
03a971a2 MG |
1252 | if (tz->forced_passive) |
1253 | thermal_zone_device_passive(tz, temp, tz->forced_passive, | |
1254 | THERMAL_TRIPS_NONE); | |
1255 | ||
caca8b80 | 1256 | leave: |
b1569e99 MG |
1257 | if (tz->passive) |
1258 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
1259 | else if (tz->polling_delay) | |
1260 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
3767cb54 FP |
1261 | else |
1262 | thermal_zone_device_set_polling(tz, 0); | |
b1569e99 MG |
1263 | mutex_unlock(&tz->lock); |
1264 | } | |
1265 | EXPORT_SYMBOL(thermal_zone_device_update); | |
1266 | ||
c56f5c03 D |
1267 | /** |
1268 | * create_trip_attrs - create attributes for trip points | |
1269 | * @tz: the thermal zone device | |
1270 | * @mask: Writeable trip point bitmap. | |
1271 | */ | |
1272 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1273 | { | |
1274 | int indx; | |
27365a6c | 1275 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1276 | |
27365a6c | 1277 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1278 | if (!tz->trip_type_attrs) |
1279 | return -ENOMEM; | |
1280 | ||
27365a6c | 1281 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1282 | if (!tz->trip_temp_attrs) { |
1283 | kfree(tz->trip_type_attrs); | |
1284 | return -ENOMEM; | |
1285 | } | |
1286 | ||
27365a6c D |
1287 | if (tz->ops->get_trip_hyst) { |
1288 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1289 | if (!tz->trip_hyst_attrs) { | |
1290 | kfree(tz->trip_type_attrs); | |
1291 | kfree(tz->trip_temp_attrs); | |
1292 | return -ENOMEM; | |
1293 | } | |
1294 | } | |
c56f5c03 | 1295 | |
27365a6c D |
1296 | |
1297 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1298 | /* create trip type attribute */ |
1299 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1300 | "trip_point_%d_type", indx); | |
1301 | ||
1302 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1303 | tz->trip_type_attrs[indx].attr.attr.name = | |
1304 | tz->trip_type_attrs[indx].name; | |
1305 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1306 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1307 | ||
1308 | device_create_file(&tz->device, | |
1309 | &tz->trip_type_attrs[indx].attr); | |
1310 | ||
1311 | /* create trip temp attribute */ | |
1312 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1313 | "trip_point_%d_temp", indx); | |
1314 | ||
1315 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1316 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1317 | tz->trip_temp_attrs[indx].name; | |
1318 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1319 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1320 | if (mask & (1 << indx)) { | |
1321 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1322 | tz->trip_temp_attrs[indx].attr.store = | |
1323 | trip_point_temp_store; | |
1324 | } | |
1325 | ||
1326 | device_create_file(&tz->device, | |
1327 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1328 | |
1329 | /* create Optional trip hyst attribute */ | |
1330 | if (!tz->ops->get_trip_hyst) | |
1331 | continue; | |
1332 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1333 | "trip_point_%d_hyst", indx); | |
1334 | ||
1335 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1336 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1337 | tz->trip_hyst_attrs[indx].name; | |
1338 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1339 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1340 | if (tz->ops->set_trip_hyst) { | |
1341 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1342 | tz->trip_hyst_attrs[indx].attr.store = | |
1343 | trip_point_hyst_store; | |
1344 | } | |
1345 | ||
1346 | device_create_file(&tz->device, | |
1347 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1348 | } |
1349 | return 0; | |
1350 | } | |
1351 | ||
1352 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1353 | { | |
1354 | int indx; | |
1355 | ||
1356 | for (indx = 0; indx < tz->trips; indx++) { | |
1357 | device_remove_file(&tz->device, | |
1358 | &tz->trip_type_attrs[indx].attr); | |
1359 | device_remove_file(&tz->device, | |
1360 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1361 | if (tz->ops->get_trip_hyst) |
1362 | device_remove_file(&tz->device, | |
1363 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1364 | } |
1365 | kfree(tz->trip_type_attrs); | |
1366 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1367 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1368 | } |
1369 | ||
203d3d4a ZR |
1370 | /** |
1371 | * thermal_zone_device_register - register a new thermal zone device | |
1372 | * @type: the thermal zone device type | |
1373 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1374 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1375 | * @devdata: private device data |
1376 | * @ops: standard thermal zone device callbacks | |
b1569e99 MG |
1377 | * @passive_delay: number of milliseconds to wait between polls when |
1378 | * performing passive cooling | |
1379 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1380 | * whether trip points have been crossed (0 for interrupt | |
1381 | * driven systems) | |
203d3d4a ZR |
1382 | * |
1383 | * thermal_zone_device_unregister() must be called when the device is no | |
1b7ddb84 | 1384 | * longer needed. The passive cooling depends on the .get_trend() return value. |
203d3d4a | 1385 | */ |
4b1bf587 | 1386 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1387 | int trips, int mask, void *devdata, |
5b275ce2 | 1388 | const struct thermal_zone_device_ops *ops, |
1b7ddb84 | 1389 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1390 | { |
1391 | struct thermal_zone_device *tz; | |
1392 | struct thermal_cooling_device *pos; | |
03a971a2 | 1393 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1394 | int result; |
1395 | int count; | |
03a971a2 | 1396 | int passive = 0; |
203d3d4a ZR |
1397 | |
1398 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 1399 | return ERR_PTR(-EINVAL); |
203d3d4a | 1400 | |
c56f5c03 | 1401 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1402 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1403 | |
1404 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1405 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1406 | |
1407 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); | |
1408 | if (!tz) | |
3e6fda5c | 1409 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1410 | |
2d374139 | 1411 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1412 | idr_init(&tz->idr); |
1413 | mutex_init(&tz->lock); | |
1414 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1415 | if (result) { | |
1416 | kfree(tz); | |
3e6fda5c | 1417 | return ERR_PTR(result); |
203d3d4a ZR |
1418 | } |
1419 | ||
1420 | strcpy(tz->type, type); | |
1421 | tz->ops = ops; | |
1422 | tz->device.class = &thermal_class; | |
1423 | tz->devdata = devdata; | |
1424 | tz->trips = trips; | |
b1569e99 MG |
1425 | tz->passive_delay = passive_delay; |
1426 | tz->polling_delay = polling_delay; | |
1427 | ||
354655ea | 1428 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1429 | result = device_register(&tz->device); |
1430 | if (result) { | |
1431 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1432 | kfree(tz); | |
3e6fda5c | 1433 | return ERR_PTR(result); |
203d3d4a ZR |
1434 | } |
1435 | ||
1436 | /* sys I/F */ | |
1437 | if (type) { | |
1438 | result = device_create_file(&tz->device, &dev_attr_type); | |
1439 | if (result) | |
1440 | goto unregister; | |
1441 | } | |
1442 | ||
1443 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1444 | if (result) | |
1445 | goto unregister; | |
1446 | ||
1447 | if (ops->get_mode) { | |
1448 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1449 | if (result) | |
1450 | goto unregister; | |
1451 | } | |
1452 | ||
c56f5c03 D |
1453 | result = create_trip_attrs(tz, mask); |
1454 | if (result) | |
1455 | goto unregister; | |
1456 | ||
203d3d4a | 1457 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1458 | tz->ops->get_trip_type(tz, count, &trip_type); |
1459 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1460 | passive = 1; | |
203d3d4a ZR |
1461 | } |
1462 | ||
03a971a2 MG |
1463 | if (!passive) |
1464 | result = device_create_file(&tz->device, | |
1465 | &dev_attr_passive); | |
1466 | ||
1467 | if (result) | |
1468 | goto unregister; | |
1469 | ||
e68b16ab ZR |
1470 | result = thermal_add_hwmon_sysfs(tz); |
1471 | if (result) | |
1472 | goto unregister; | |
1473 | ||
203d3d4a ZR |
1474 | mutex_lock(&thermal_list_lock); |
1475 | list_add_tail(&tz->node, &thermal_tz_list); | |
1476 | if (ops->bind) | |
1477 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
543a9561 LB |
1478 | result = ops->bind(tz, pos); |
1479 | if (result) | |
1480 | break; | |
203d3d4a ZR |
1481 | } |
1482 | mutex_unlock(&thermal_list_lock); | |
1483 | ||
b1569e99 MG |
1484 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1485 | ||
1486 | thermal_zone_device_update(tz); | |
1487 | ||
203d3d4a ZR |
1488 | if (!result) |
1489 | return tz; | |
1490 | ||
caca8b80 | 1491 | unregister: |
203d3d4a ZR |
1492 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1493 | device_unregister(&tz->device); | |
3e6fda5c | 1494 | return ERR_PTR(result); |
203d3d4a ZR |
1495 | } |
1496 | EXPORT_SYMBOL(thermal_zone_device_register); | |
1497 | ||
1498 | /** | |
1499 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1500 | * @tz: the thermal zone device to remove |
1501 | */ | |
1502 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1503 | { | |
1504 | struct thermal_cooling_device *cdev; | |
1505 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1506 | |
1507 | if (!tz) | |
1508 | return; | |
1509 | ||
1510 | mutex_lock(&thermal_list_lock); | |
1511 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1512 | if (pos == tz) | |
1513 | break; | |
1514 | if (pos != tz) { | |
1515 | /* thermal zone device not found */ | |
1516 | mutex_unlock(&thermal_list_lock); | |
1517 | return; | |
1518 | } | |
1519 | list_del(&tz->node); | |
1520 | if (tz->ops->unbind) | |
1521 | list_for_each_entry(cdev, &thermal_cdev_list, node) | |
1522 | tz->ops->unbind(tz, cdev); | |
1523 | mutex_unlock(&thermal_list_lock); | |
1524 | ||
b1569e99 MG |
1525 | thermal_zone_device_set_polling(tz, 0); |
1526 | ||
203d3d4a ZR |
1527 | if (tz->type[0]) |
1528 | device_remove_file(&tz->device, &dev_attr_type); | |
1529 | device_remove_file(&tz->device, &dev_attr_temp); | |
1530 | if (tz->ops->get_mode) | |
1531 | device_remove_file(&tz->device, &dev_attr_mode); | |
c56f5c03 | 1532 | remove_trip_attrs(tz); |
203d3d4a | 1533 | |
e68b16ab | 1534 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1535 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1536 | idr_destroy(&tz->idr); | |
1537 | mutex_destroy(&tz->lock); | |
1538 | device_unregister(&tz->device); | |
1539 | return; | |
1540 | } | |
1541 | EXPORT_SYMBOL(thermal_zone_device_unregister); | |
1542 | ||
af06216a RW |
1543 | #ifdef CONFIG_NET |
1544 | static struct genl_family thermal_event_genl_family = { | |
1545 | .id = GENL_ID_GENERATE, | |
1546 | .name = THERMAL_GENL_FAMILY_NAME, | |
1547 | .version = THERMAL_GENL_VERSION, | |
1548 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1549 | }; | |
1550 | ||
1551 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1552 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1553 | }; | |
1554 | ||
2d58d7ea | 1555 | int thermal_generate_netlink_event(u32 orig, enum events event) |
4cb18728 D |
1556 | { |
1557 | struct sk_buff *skb; | |
1558 | struct nlattr *attr; | |
1559 | struct thermal_genl_event *thermal_event; | |
1560 | void *msg_header; | |
1561 | int size; | |
1562 | int result; | |
b11de07c | 1563 | static unsigned int thermal_event_seqnum; |
4cb18728 D |
1564 | |
1565 | /* allocate memory */ | |
886ee546 JP |
1566 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1567 | nla_total_size(0); | |
4cb18728 D |
1568 | |
1569 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1570 | if (!skb) | |
1571 | return -ENOMEM; | |
1572 | ||
1573 | /* add the genetlink message header */ | |
1574 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1575 | &thermal_event_genl_family, 0, | |
1576 | THERMAL_GENL_CMD_EVENT); | |
1577 | if (!msg_header) { | |
1578 | nlmsg_free(skb); | |
1579 | return -ENOMEM; | |
1580 | } | |
1581 | ||
1582 | /* fill the data */ | |
886ee546 JP |
1583 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1584 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1585 | |
1586 | if (!attr) { | |
1587 | nlmsg_free(skb); | |
1588 | return -EINVAL; | |
1589 | } | |
1590 | ||
1591 | thermal_event = nla_data(attr); | |
1592 | if (!thermal_event) { | |
1593 | nlmsg_free(skb); | |
1594 | return -EINVAL; | |
1595 | } | |
1596 | ||
1597 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1598 | ||
1599 | thermal_event->orig = orig; | |
1600 | thermal_event->event = event; | |
1601 | ||
1602 | /* send multicast genetlink message */ | |
1603 | result = genlmsg_end(skb, msg_header); | |
1604 | if (result < 0) { | |
1605 | nlmsg_free(skb); | |
1606 | return result; | |
1607 | } | |
1608 | ||
1609 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1610 | if (result) | |
c5a01dd5 | 1611 | pr_info("failed to send netlink event:%d\n", result); |
4cb18728 D |
1612 | |
1613 | return result; | |
1614 | } | |
2d58d7ea | 1615 | EXPORT_SYMBOL(thermal_generate_netlink_event); |
4cb18728 D |
1616 | |
1617 | static int genetlink_init(void) | |
1618 | { | |
1619 | int result; | |
1620 | ||
1621 | result = genl_register_family(&thermal_event_genl_family); | |
1622 | if (result) | |
1623 | return result; | |
1624 | ||
1625 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1626 | &thermal_event_mcgrp); | |
1627 | if (result) | |
1628 | genl_unregister_family(&thermal_event_genl_family); | |
1629 | return result; | |
1630 | } | |
1631 | ||
af06216a RW |
1632 | static void genetlink_exit(void) |
1633 | { | |
1634 | genl_unregister_family(&thermal_event_genl_family); | |
1635 | } | |
1636 | #else /* !CONFIG_NET */ | |
1637 | static inline int genetlink_init(void) { return 0; } | |
1638 | static inline void genetlink_exit(void) {} | |
1639 | #endif /* !CONFIG_NET */ | |
1640 | ||
203d3d4a ZR |
1641 | static int __init thermal_init(void) |
1642 | { | |
1643 | int result = 0; | |
1644 | ||
1645 | result = class_register(&thermal_class); | |
1646 | if (result) { | |
1647 | idr_destroy(&thermal_tz_idr); | |
1648 | idr_destroy(&thermal_cdev_idr); | |
1649 | mutex_destroy(&thermal_idr_lock); | |
1650 | mutex_destroy(&thermal_list_lock); | |
1651 | } | |
4cb18728 | 1652 | result = genetlink_init(); |
203d3d4a ZR |
1653 | return result; |
1654 | } | |
1655 | ||
1656 | static void __exit thermal_exit(void) | |
1657 | { | |
1658 | class_unregister(&thermal_class); | |
1659 | idr_destroy(&thermal_tz_idr); | |
1660 | idr_destroy(&thermal_cdev_idr); | |
1661 | mutex_destroy(&thermal_idr_lock); | |
1662 | mutex_destroy(&thermal_list_lock); | |
4cb18728 | 1663 | genetlink_exit(); |
203d3d4a ZR |
1664 | } |
1665 | ||
4cb18728 | 1666 | fs_initcall(thermal_init); |
203d3d4a | 1667 | module_exit(thermal_exit); |