Commit | Line | Data |
---|---|---|
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> | |
b1569e99 | 35 | #include <linux/reboot.h> |
4cb18728 D |
36 | #include <net/netlink.h> |
37 | #include <net/genetlink.h> | |
203d3d4a | 38 | |
71350db4 D |
39 | #include "thermal_core.h" |
40 | ||
63c4ec90 | 41 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a ZR |
42 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
203d3d4a ZR |
45 | static DEFINE_IDR(thermal_tz_idr); |
46 | static DEFINE_IDR(thermal_cdev_idr); | |
47 | static DEFINE_MUTEX(thermal_idr_lock); | |
48 | ||
49 | static LIST_HEAD(thermal_tz_list); | |
50 | static LIST_HEAD(thermal_cdev_list); | |
a4a15485 D |
51 | static LIST_HEAD(thermal_governor_list); |
52 | ||
203d3d4a | 53 | static DEFINE_MUTEX(thermal_list_lock); |
a4a15485 D |
54 | static DEFINE_MUTEX(thermal_governor_lock); |
55 | ||
56 | static struct thermal_governor *__find_governor(const char *name) | |
57 | { | |
58 | struct thermal_governor *pos; | |
59 | ||
60 | list_for_each_entry(pos, &thermal_governor_list, governor_list) | |
61 | if (!strnicmp(name, pos->name, THERMAL_NAME_LENGTH)) | |
62 | return pos; | |
63 | ||
64 | return NULL; | |
65 | } | |
66 | ||
67 | int thermal_register_governor(struct thermal_governor *governor) | |
68 | { | |
69 | int err; | |
70 | const char *name; | |
71 | struct thermal_zone_device *pos; | |
72 | ||
73 | if (!governor) | |
74 | return -EINVAL; | |
75 | ||
76 | mutex_lock(&thermal_governor_lock); | |
77 | ||
78 | err = -EBUSY; | |
79 | if (__find_governor(governor->name) == NULL) { | |
80 | err = 0; | |
81 | list_add(&governor->governor_list, &thermal_governor_list); | |
82 | } | |
83 | ||
84 | mutex_lock(&thermal_list_lock); | |
85 | ||
86 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
87 | if (pos->governor) | |
88 | continue; | |
89 | if (pos->tzp) | |
90 | name = pos->tzp->governor_name; | |
91 | else | |
92 | name = DEFAULT_THERMAL_GOVERNOR; | |
93 | if (!strnicmp(name, governor->name, THERMAL_NAME_LENGTH)) | |
94 | pos->governor = governor; | |
95 | } | |
96 | ||
97 | mutex_unlock(&thermal_list_lock); | |
98 | mutex_unlock(&thermal_governor_lock); | |
99 | ||
100 | return err; | |
101 | } | |
a4a15485 D |
102 | |
103 | void thermal_unregister_governor(struct thermal_governor *governor) | |
104 | { | |
105 | struct thermal_zone_device *pos; | |
106 | ||
107 | if (!governor) | |
108 | return; | |
109 | ||
110 | mutex_lock(&thermal_governor_lock); | |
111 | ||
112 | if (__find_governor(governor->name) == NULL) | |
113 | goto exit; | |
114 | ||
115 | mutex_lock(&thermal_list_lock); | |
116 | ||
117 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
118 | if (!strnicmp(pos->governor->name, governor->name, | |
119 | THERMAL_NAME_LENGTH)) | |
120 | pos->governor = NULL; | |
121 | } | |
122 | ||
123 | mutex_unlock(&thermal_list_lock); | |
124 | list_del(&governor->governor_list); | |
125 | exit: | |
126 | mutex_unlock(&thermal_governor_lock); | |
127 | return; | |
128 | } | |
203d3d4a ZR |
129 | |
130 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
131 | { | |
6deb69fa | 132 | int ret; |
203d3d4a ZR |
133 | |
134 | if (lock) | |
135 | mutex_lock(lock); | |
6deb69fa | 136 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); |
203d3d4a ZR |
137 | if (lock) |
138 | mutex_unlock(lock); | |
6deb69fa TH |
139 | if (unlikely(ret < 0)) |
140 | return ret; | |
141 | *id = ret; | |
203d3d4a ZR |
142 | return 0; |
143 | } | |
144 | ||
145 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
146 | { | |
147 | if (lock) | |
148 | mutex_lock(lock); | |
149 | idr_remove(idr, id); | |
150 | if (lock) | |
151 | mutex_unlock(lock); | |
152 | } | |
153 | ||
9b4298a0 D |
154 | int get_tz_trend(struct thermal_zone_device *tz, int trip) |
155 | { | |
156 | enum thermal_trend trend; | |
157 | ||
158 | if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { | |
159 | if (tz->temperature > tz->last_temperature) | |
160 | trend = THERMAL_TREND_RAISING; | |
161 | else if (tz->temperature < tz->last_temperature) | |
162 | trend = THERMAL_TREND_DROPPING; | |
163 | else | |
164 | trend = THERMAL_TREND_STABLE; | |
165 | } | |
166 | ||
167 | return trend; | |
168 | } | |
169 | EXPORT_SYMBOL(get_tz_trend); | |
170 | ||
171 | struct thermal_instance *get_thermal_instance(struct thermal_zone_device *tz, | |
172 | struct thermal_cooling_device *cdev, int trip) | |
173 | { | |
174 | struct thermal_instance *pos = NULL; | |
175 | struct thermal_instance *target_instance = NULL; | |
176 | ||
177 | mutex_lock(&tz->lock); | |
178 | mutex_lock(&cdev->lock); | |
179 | ||
180 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) { | |
181 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
182 | target_instance = pos; | |
183 | break; | |
184 | } | |
185 | } | |
186 | ||
187 | mutex_unlock(&cdev->lock); | |
188 | mutex_unlock(&tz->lock); | |
189 | ||
190 | return target_instance; | |
191 | } | |
192 | EXPORT_SYMBOL(get_thermal_instance); | |
193 | ||
7e8ee1e9 D |
194 | static void print_bind_err_msg(struct thermal_zone_device *tz, |
195 | struct thermal_cooling_device *cdev, int ret) | |
196 | { | |
197 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
198 | tz->type, cdev->type, ret); | |
199 | } | |
200 | ||
201 | static void __bind(struct thermal_zone_device *tz, int mask, | |
202 | struct thermal_cooling_device *cdev) | |
203 | { | |
204 | int i, ret; | |
205 | ||
206 | for (i = 0; i < tz->trips; i++) { | |
207 | if (mask & (1 << i)) { | |
208 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, | |
209 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); | |
210 | if (ret) | |
211 | print_bind_err_msg(tz, cdev, ret); | |
212 | } | |
213 | } | |
214 | } | |
215 | ||
216 | static void __unbind(struct thermal_zone_device *tz, int mask, | |
217 | struct thermal_cooling_device *cdev) | |
218 | { | |
219 | int i; | |
220 | ||
221 | for (i = 0; i < tz->trips; i++) | |
222 | if (mask & (1 << i)) | |
223 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
224 | } | |
225 | ||
226 | static void bind_cdev(struct thermal_cooling_device *cdev) | |
227 | { | |
228 | int i, ret; | |
229 | const struct thermal_zone_params *tzp; | |
230 | struct thermal_zone_device *pos = NULL; | |
231 | ||
232 | mutex_lock(&thermal_list_lock); | |
233 | ||
234 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
235 | if (!pos->tzp && !pos->ops->bind) | |
236 | continue; | |
237 | ||
238 | if (!pos->tzp && pos->ops->bind) { | |
239 | ret = pos->ops->bind(pos, cdev); | |
240 | if (ret) | |
241 | print_bind_err_msg(pos, cdev, ret); | |
242 | } | |
243 | ||
244 | tzp = pos->tzp; | |
791700cd HD |
245 | if (!tzp || !tzp->tbp) |
246 | continue; | |
7e8ee1e9 D |
247 | |
248 | for (i = 0; i < tzp->num_tbps; i++) { | |
249 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
250 | continue; | |
251 | if (tzp->tbp[i].match(pos, cdev)) | |
252 | continue; | |
253 | tzp->tbp[i].cdev = cdev; | |
254 | __bind(pos, tzp->tbp[i].trip_mask, cdev); | |
255 | } | |
256 | } | |
257 | ||
258 | mutex_unlock(&thermal_list_lock); | |
259 | } | |
260 | ||
261 | static void bind_tz(struct thermal_zone_device *tz) | |
262 | { | |
263 | int i, ret; | |
264 | struct thermal_cooling_device *pos = NULL; | |
265 | const struct thermal_zone_params *tzp = tz->tzp; | |
266 | ||
267 | if (!tzp && !tz->ops->bind) | |
268 | return; | |
269 | ||
270 | mutex_lock(&thermal_list_lock); | |
271 | ||
272 | /* If there is no platform data, try to use ops->bind */ | |
273 | if (!tzp && tz->ops->bind) { | |
274 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
275 | ret = tz->ops->bind(tz, pos); | |
276 | if (ret) | |
277 | print_bind_err_msg(tz, pos, ret); | |
278 | } | |
279 | goto exit; | |
280 | } | |
281 | ||
791700cd | 282 | if (!tzp || !tzp->tbp) |
7e8ee1e9 D |
283 | goto exit; |
284 | ||
285 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
286 | for (i = 0; i < tzp->num_tbps; i++) { | |
287 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
288 | continue; | |
289 | if (tzp->tbp[i].match(tz, pos)) | |
290 | continue; | |
291 | tzp->tbp[i].cdev = pos; | |
292 | __bind(tz, tzp->tbp[i].trip_mask, pos); | |
293 | } | |
294 | } | |
295 | exit: | |
296 | mutex_unlock(&thermal_list_lock); | |
297 | } | |
298 | ||
0c01ebbf D |
299 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
300 | int delay) | |
301 | { | |
302 | if (delay > 1000) | |
303 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
304 | round_jiffies(msecs_to_jiffies(delay))); | |
305 | else if (delay) | |
306 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
307 | msecs_to_jiffies(delay)); | |
308 | else | |
309 | cancel_delayed_work(&tz->poll_queue); | |
310 | } | |
311 | ||
312 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
313 | { | |
314 | mutex_lock(&tz->lock); | |
315 | ||
316 | if (tz->passive) | |
317 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
318 | else if (tz->polling_delay) | |
319 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
320 | else | |
321 | thermal_zone_device_set_polling(tz, 0); | |
322 | ||
323 | mutex_unlock(&tz->lock); | |
324 | } | |
325 | ||
326 | static void handle_non_critical_trips(struct thermal_zone_device *tz, | |
327 | int trip, enum thermal_trip_type trip_type) | |
328 | { | |
d567c686 ZR |
329 | if (tz->governor) |
330 | tz->governor->throttle(tz, trip); | |
0c01ebbf D |
331 | } |
332 | ||
333 | static void handle_critical_trips(struct thermal_zone_device *tz, | |
334 | int trip, enum thermal_trip_type trip_type) | |
335 | { | |
336 | long trip_temp; | |
337 | ||
338 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
339 | ||
340 | /* If we have not crossed the trip_temp, we do not care. */ | |
341 | if (tz->temperature < trip_temp) | |
342 | return; | |
343 | ||
344 | if (tz->ops->notify) | |
345 | tz->ops->notify(tz, trip, trip_type); | |
346 | ||
347 | if (trip_type == THERMAL_TRIP_CRITICAL) { | |
923e0b1e EV |
348 | dev_emerg(&tz->device, |
349 | "critical temperature reached(%d C),shutting down\n", | |
350 | tz->temperature / 1000); | |
0c01ebbf D |
351 | orderly_poweroff(true); |
352 | } | |
353 | } | |
354 | ||
355 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) | |
356 | { | |
357 | enum thermal_trip_type type; | |
358 | ||
359 | tz->ops->get_trip_type(tz, trip, &type); | |
360 | ||
361 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
362 | handle_critical_trips(tz, trip, type); | |
363 | else | |
364 | handle_non_critical_trips(tz, trip, type); | |
365 | /* | |
366 | * Alright, we handled this trip successfully. | |
367 | * So, start monitoring again. | |
368 | */ | |
369 | monitor_thermal_zone(tz); | |
370 | } | |
371 | ||
e6e238c3 ADK |
372 | static int thermal_zone_get_temp(struct thermal_zone_device *tz, |
373 | unsigned long *temp) | |
374 | { | |
5e20b2e5 ZR |
375 | int ret = 0; |
376 | #ifdef CONFIG_THERMAL_EMULATION | |
377 | int count; | |
e6e238c3 ADK |
378 | unsigned long crit_temp = -1UL; |
379 | enum thermal_trip_type type; | |
5e20b2e5 | 380 | #endif |
e6e238c3 ADK |
381 | |
382 | mutex_lock(&tz->lock); | |
383 | ||
384 | ret = tz->ops->get_temp(tz, temp); | |
385 | #ifdef CONFIG_THERMAL_EMULATION | |
386 | if (!tz->emul_temperature) | |
387 | goto skip_emul; | |
388 | ||
389 | for (count = 0; count < tz->trips; count++) { | |
390 | ret = tz->ops->get_trip_type(tz, count, &type); | |
391 | if (!ret && type == THERMAL_TRIP_CRITICAL) { | |
392 | ret = tz->ops->get_trip_temp(tz, count, &crit_temp); | |
393 | break; | |
394 | } | |
395 | } | |
396 | ||
397 | if (ret) | |
398 | goto skip_emul; | |
399 | ||
400 | if (*temp < crit_temp) | |
401 | *temp = tz->emul_temperature; | |
402 | skip_emul: | |
403 | #endif | |
404 | mutex_unlock(&tz->lock); | |
405 | return ret; | |
406 | } | |
407 | ||
0c01ebbf D |
408 | static void update_temperature(struct thermal_zone_device *tz) |
409 | { | |
410 | long temp; | |
411 | int ret; | |
412 | ||
e6e238c3 | 413 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 414 | if (ret) { |
923e0b1e EV |
415 | dev_warn(&tz->device, "failed to read out thermal zone %d\n", |
416 | tz->id); | |
e6e238c3 | 417 | return; |
0c01ebbf D |
418 | } |
419 | ||
e6e238c3 | 420 | mutex_lock(&tz->lock); |
0c01ebbf D |
421 | tz->last_temperature = tz->temperature; |
422 | tz->temperature = temp; | |
0c01ebbf D |
423 | mutex_unlock(&tz->lock); |
424 | } | |
425 | ||
426 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
427 | { | |
428 | int count; | |
429 | ||
430 | update_temperature(tz); | |
431 | ||
432 | for (count = 0; count < tz->trips; count++) | |
433 | handle_thermal_trip(tz, count); | |
434 | } | |
435 | EXPORT_SYMBOL(thermal_zone_device_update); | |
436 | ||
437 | static void thermal_zone_device_check(struct work_struct *work) | |
438 | { | |
439 | struct thermal_zone_device *tz = container_of(work, struct | |
440 | thermal_zone_device, | |
441 | poll_queue.work); | |
442 | thermal_zone_device_update(tz); | |
443 | } | |
444 | ||
203d3d4a ZR |
445 | /* sys I/F for thermal zone */ |
446 | ||
447 | #define to_thermal_zone(_dev) \ | |
448 | container_of(_dev, struct thermal_zone_device, device) | |
449 | ||
450 | static ssize_t | |
451 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
452 | { | |
453 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
454 | ||
455 | return sprintf(buf, "%s\n", tz->type); | |
456 | } | |
457 | ||
458 | static ssize_t | |
459 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
460 | { | |
461 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
462 | long temperature; |
463 | int ret; | |
203d3d4a | 464 | |
e6e238c3 | 465 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
466 | |
467 | if (ret) | |
468 | return ret; | |
469 | ||
470 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
471 | } |
472 | ||
473 | static ssize_t | |
474 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
475 | { | |
476 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
477 | enum thermal_device_mode mode; |
478 | int result; | |
203d3d4a ZR |
479 | |
480 | if (!tz->ops->get_mode) | |
481 | return -EPERM; | |
482 | ||
6503e5df MG |
483 | result = tz->ops->get_mode(tz, &mode); |
484 | if (result) | |
485 | return result; | |
486 | ||
487 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
488 | : "disabled"); | |
203d3d4a ZR |
489 | } |
490 | ||
491 | static ssize_t | |
492 | mode_store(struct device *dev, struct device_attribute *attr, | |
493 | const char *buf, size_t count) | |
494 | { | |
495 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
496 | int result; | |
497 | ||
498 | if (!tz->ops->set_mode) | |
499 | return -EPERM; | |
500 | ||
f1f0e2ac | 501 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 502 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 503 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
504 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
505 | else | |
506 | result = -EINVAL; | |
507 | ||
203d3d4a ZR |
508 | if (result) |
509 | return result; | |
510 | ||
511 | return count; | |
512 | } | |
513 | ||
514 | static ssize_t | |
515 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
516 | char *buf) | |
517 | { | |
518 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
519 | enum thermal_trip_type type; |
520 | int trip, result; | |
203d3d4a ZR |
521 | |
522 | if (!tz->ops->get_trip_type) | |
523 | return -EPERM; | |
524 | ||
525 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
526 | return -EINVAL; | |
527 | ||
6503e5df MG |
528 | result = tz->ops->get_trip_type(tz, trip, &type); |
529 | if (result) | |
530 | return result; | |
531 | ||
532 | switch (type) { | |
533 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 534 | return sprintf(buf, "critical\n"); |
6503e5df | 535 | case THERMAL_TRIP_HOT: |
625120a4 | 536 | return sprintf(buf, "hot\n"); |
6503e5df | 537 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 538 | return sprintf(buf, "passive\n"); |
6503e5df | 539 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 540 | return sprintf(buf, "active\n"); |
6503e5df | 541 | default: |
625120a4 | 542 | return sprintf(buf, "unknown\n"); |
6503e5df | 543 | } |
203d3d4a ZR |
544 | } |
545 | ||
c56f5c03 D |
546 | static ssize_t |
547 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
548 | const char *buf, size_t count) | |
549 | { | |
550 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
551 | int trip, ret; | |
552 | unsigned long temperature; | |
553 | ||
554 | if (!tz->ops->set_trip_temp) | |
555 | return -EPERM; | |
556 | ||
557 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
558 | return -EINVAL; | |
559 | ||
560 | if (kstrtoul(buf, 10, &temperature)) | |
561 | return -EINVAL; | |
562 | ||
563 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
564 | ||
565 | return ret ? ret : count; | |
566 | } | |
567 | ||
203d3d4a ZR |
568 | static ssize_t |
569 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
570 | char *buf) | |
571 | { | |
572 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
573 | int trip, ret; |
574 | long temperature; | |
203d3d4a ZR |
575 | |
576 | if (!tz->ops->get_trip_temp) | |
577 | return -EPERM; | |
578 | ||
579 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
580 | return -EINVAL; | |
581 | ||
6503e5df MG |
582 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
583 | ||
584 | if (ret) | |
585 | return ret; | |
586 | ||
587 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
588 | } |
589 | ||
27365a6c D |
590 | static ssize_t |
591 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
592 | const char *buf, size_t count) | |
593 | { | |
594 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
595 | int trip, ret; | |
596 | unsigned long temperature; | |
597 | ||
598 | if (!tz->ops->set_trip_hyst) | |
599 | return -EPERM; | |
600 | ||
601 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
602 | return -EINVAL; | |
603 | ||
604 | if (kstrtoul(buf, 10, &temperature)) | |
605 | return -EINVAL; | |
606 | ||
607 | /* | |
608 | * We are not doing any check on the 'temperature' value | |
609 | * here. The driver implementing 'set_trip_hyst' has to | |
610 | * take care of this. | |
611 | */ | |
612 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
613 | ||
614 | return ret ? ret : count; | |
615 | } | |
616 | ||
617 | static ssize_t | |
618 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
619 | char *buf) | |
620 | { | |
621 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
622 | int trip, ret; | |
623 | unsigned long temperature; | |
624 | ||
625 | if (!tz->ops->get_trip_hyst) | |
626 | return -EPERM; | |
627 | ||
628 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
629 | return -EINVAL; | |
630 | ||
631 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
632 | ||
633 | return ret ? ret : sprintf(buf, "%ld\n", temperature); | |
634 | } | |
635 | ||
03a971a2 MG |
636 | static ssize_t |
637 | passive_store(struct device *dev, struct device_attribute *attr, | |
638 | const char *buf, size_t count) | |
639 | { | |
640 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
641 | struct thermal_cooling_device *cdev = NULL; | |
642 | int state; | |
643 | ||
644 | if (!sscanf(buf, "%d\n", &state)) | |
645 | return -EINVAL; | |
646 | ||
3d8e3ad8 FP |
647 | /* sanity check: values below 1000 millicelcius don't make sense |
648 | * and can cause the system to go into a thermal heart attack | |
649 | */ | |
650 | if (state && state < 1000) | |
651 | return -EINVAL; | |
652 | ||
03a971a2 MG |
653 | if (state && !tz->forced_passive) { |
654 | mutex_lock(&thermal_list_lock); | |
655 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
656 | if (!strncmp("Processor", cdev->type, | |
657 | sizeof("Processor"))) | |
658 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
659 | THERMAL_TRIPS_NONE, cdev, |
660 | THERMAL_NO_LIMIT, | |
661 | THERMAL_NO_LIMIT); | |
03a971a2 MG |
662 | } |
663 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
664 | if (!tz->passive_delay) |
665 | tz->passive_delay = 1000; | |
03a971a2 MG |
666 | } else if (!state && tz->forced_passive) { |
667 | mutex_lock(&thermal_list_lock); | |
668 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
669 | if (!strncmp("Processor", cdev->type, | |
670 | sizeof("Processor"))) | |
671 | thermal_zone_unbind_cooling_device(tz, | |
672 | THERMAL_TRIPS_NONE, | |
673 | cdev); | |
674 | } | |
675 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 676 | tz->passive_delay = 0; |
03a971a2 MG |
677 | } |
678 | ||
03a971a2 MG |
679 | tz->forced_passive = state; |
680 | ||
681 | thermal_zone_device_update(tz); | |
682 | ||
683 | return count; | |
684 | } | |
685 | ||
686 | static ssize_t | |
687 | passive_show(struct device *dev, struct device_attribute *attr, | |
688 | char *buf) | |
689 | { | |
690 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
691 | ||
692 | return sprintf(buf, "%d\n", tz->forced_passive); | |
693 | } | |
694 | ||
5a2c090b D |
695 | static ssize_t |
696 | policy_store(struct device *dev, struct device_attribute *attr, | |
697 | const char *buf, size_t count) | |
698 | { | |
699 | int ret = -EINVAL; | |
700 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
701 | struct thermal_governor *gov; | |
702 | ||
703 | mutex_lock(&thermal_governor_lock); | |
704 | ||
705 | gov = __find_governor(buf); | |
706 | if (!gov) | |
707 | goto exit; | |
708 | ||
709 | tz->governor = gov; | |
710 | ret = count; | |
711 | ||
712 | exit: | |
713 | mutex_unlock(&thermal_governor_lock); | |
714 | return ret; | |
715 | } | |
716 | ||
717 | static ssize_t | |
718 | policy_show(struct device *dev, struct device_attribute *devattr, char *buf) | |
719 | { | |
720 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
721 | ||
722 | return sprintf(buf, "%s\n", tz->governor->name); | |
723 | } | |
724 | ||
e6e238c3 ADK |
725 | #ifdef CONFIG_THERMAL_EMULATION |
726 | static ssize_t | |
727 | emul_temp_store(struct device *dev, struct device_attribute *attr, | |
728 | const char *buf, size_t count) | |
729 | { | |
730 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
731 | int ret = 0; | |
732 | unsigned long temperature; | |
733 | ||
734 | if (kstrtoul(buf, 10, &temperature)) | |
735 | return -EINVAL; | |
736 | ||
737 | if (!tz->ops->set_emul_temp) { | |
738 | mutex_lock(&tz->lock); | |
739 | tz->emul_temperature = temperature; | |
740 | mutex_unlock(&tz->lock); | |
741 | } else { | |
742 | ret = tz->ops->set_emul_temp(tz, temperature); | |
743 | } | |
744 | ||
745 | return ret ? ret : count; | |
746 | } | |
747 | static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store); | |
748 | #endif/*CONFIG_THERMAL_EMULATION*/ | |
749 | ||
203d3d4a ZR |
750 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
751 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
752 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 753 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
5a2c090b | 754 | static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store); |
203d3d4a | 755 | |
203d3d4a ZR |
756 | /* sys I/F for cooling device */ |
757 | #define to_cooling_device(_dev) \ | |
758 | container_of(_dev, struct thermal_cooling_device, device) | |
759 | ||
760 | static ssize_t | |
761 | thermal_cooling_device_type_show(struct device *dev, | |
762 | struct device_attribute *attr, char *buf) | |
763 | { | |
764 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
765 | ||
766 | return sprintf(buf, "%s\n", cdev->type); | |
767 | } | |
768 | ||
769 | static ssize_t | |
770 | thermal_cooling_device_max_state_show(struct device *dev, | |
771 | struct device_attribute *attr, char *buf) | |
772 | { | |
773 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
774 | unsigned long state; |
775 | int ret; | |
203d3d4a | 776 | |
6503e5df MG |
777 | ret = cdev->ops->get_max_state(cdev, &state); |
778 | if (ret) | |
779 | return ret; | |
780 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
781 | } |
782 | ||
783 | static ssize_t | |
784 | thermal_cooling_device_cur_state_show(struct device *dev, | |
785 | struct device_attribute *attr, char *buf) | |
786 | { | |
787 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
788 | unsigned long state; |
789 | int ret; | |
203d3d4a | 790 | |
6503e5df MG |
791 | ret = cdev->ops->get_cur_state(cdev, &state); |
792 | if (ret) | |
793 | return ret; | |
794 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
795 | } |
796 | ||
797 | static ssize_t | |
798 | thermal_cooling_device_cur_state_store(struct device *dev, | |
799 | struct device_attribute *attr, | |
800 | const char *buf, size_t count) | |
801 | { | |
802 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 803 | unsigned long state; |
203d3d4a ZR |
804 | int result; |
805 | ||
6503e5df | 806 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
807 | return -EINVAL; |
808 | ||
edb94918 | 809 | if ((long)state < 0) |
203d3d4a ZR |
810 | return -EINVAL; |
811 | ||
812 | result = cdev->ops->set_cur_state(cdev, state); | |
813 | if (result) | |
814 | return result; | |
815 | return count; | |
816 | } | |
817 | ||
818 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 819 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
820 | static DEVICE_ATTR(max_state, 0444, |
821 | thermal_cooling_device_max_state_show, NULL); | |
822 | static DEVICE_ATTR(cur_state, 0644, | |
823 | thermal_cooling_device_cur_state_show, | |
824 | thermal_cooling_device_cur_state_store); | |
825 | ||
826 | static ssize_t | |
827 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 828 | struct device_attribute *attr, char *buf) |
203d3d4a | 829 | { |
b81b6ba3 | 830 | struct thermal_instance *instance; |
203d3d4a ZR |
831 | |
832 | instance = | |
b81b6ba3 | 833 | container_of(attr, struct thermal_instance, attr); |
203d3d4a ZR |
834 | |
835 | if (instance->trip == THERMAL_TRIPS_NONE) | |
836 | return sprintf(buf, "-1\n"); | |
837 | else | |
838 | return sprintf(buf, "%d\n", instance->trip); | |
839 | } | |
840 | ||
841 | /* Device management */ | |
842 | ||
16d75239 RH |
843 | #if defined(CONFIG_THERMAL_HWMON) |
844 | ||
e68b16ab ZR |
845 | /* hwmon sys I/F */ |
846 | #include <linux/hwmon.h> | |
31f5396a JD |
847 | |
848 | /* thermal zone devices with the same type share one hwmon device */ | |
849 | struct thermal_hwmon_device { | |
850 | char type[THERMAL_NAME_LENGTH]; | |
851 | struct device *device; | |
852 | int count; | |
853 | struct list_head tz_list; | |
854 | struct list_head node; | |
855 | }; | |
856 | ||
857 | struct thermal_hwmon_attr { | |
858 | struct device_attribute attr; | |
859 | char name[16]; | |
860 | }; | |
861 | ||
862 | /* one temperature input for each thermal zone */ | |
863 | struct thermal_hwmon_temp { | |
864 | struct list_head hwmon_node; | |
865 | struct thermal_zone_device *tz; | |
866 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
867 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
868 | }; | |
869 | ||
e68b16ab ZR |
870 | static LIST_HEAD(thermal_hwmon_list); |
871 | ||
872 | static ssize_t | |
873 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
874 | { | |
0e968a3b | 875 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
876 | return sprintf(buf, "%s\n", hwmon->type); |
877 | } | |
878 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
879 | ||
880 | static ssize_t | |
881 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
882 | { | |
6503e5df MG |
883 | long temperature; |
884 | int ret; | |
e68b16ab ZR |
885 | struct thermal_hwmon_attr *hwmon_attr |
886 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
887 | struct thermal_hwmon_temp *temp |
888 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 889 | temp_input); |
31f5396a | 890 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 891 | |
e6e238c3 | 892 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
893 | |
894 | if (ret) | |
895 | return ret; | |
896 | ||
897 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
898 | } |
899 | ||
900 | static ssize_t | |
901 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
902 | char *buf) | |
903 | { | |
904 | struct thermal_hwmon_attr *hwmon_attr | |
905 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
906 | struct thermal_hwmon_temp *temp |
907 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 908 | temp_crit); |
31f5396a | 909 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
910 | long temperature; |
911 | int ret; | |
912 | ||
913 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
914 | if (ret) | |
915 | return ret; | |
e68b16ab | 916 | |
6503e5df | 917 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
918 | } |
919 | ||
920 | ||
0d97d7a4 JD |
921 | static struct thermal_hwmon_device * |
922 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
923 | { |
924 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
925 | |
926 | mutex_lock(&thermal_list_lock); | |
927 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
928 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 929 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 930 | return hwmon; |
e68b16ab ZR |
931 | } |
932 | mutex_unlock(&thermal_list_lock); | |
933 | ||
0d97d7a4 JD |
934 | return NULL; |
935 | } | |
936 | ||
31f5396a JD |
937 | /* Find the temperature input matching a given thermal zone */ |
938 | static struct thermal_hwmon_temp * | |
939 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
940 | const struct thermal_zone_device *tz) | |
941 | { | |
942 | struct thermal_hwmon_temp *temp; | |
943 | ||
944 | mutex_lock(&thermal_list_lock); | |
945 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
946 | if (temp->tz == tz) { | |
947 | mutex_unlock(&thermal_list_lock); | |
948 | return temp; | |
949 | } | |
950 | mutex_unlock(&thermal_list_lock); | |
951 | ||
952 | return NULL; | |
953 | } | |
954 | ||
0d97d7a4 JD |
955 | static int |
956 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
957 | { | |
958 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 959 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
960 | int new_hwmon_device = 1; |
961 | int result; | |
962 | ||
963 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
964 | if (hwmon) { | |
965 | new_hwmon_device = 0; | |
966 | goto register_sys_interface; | |
967 | } | |
968 | ||
e68b16ab ZR |
969 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
970 | if (!hwmon) | |
971 | return -ENOMEM; | |
972 | ||
973 | INIT_LIST_HEAD(&hwmon->tz_list); | |
974 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
975 | hwmon->device = hwmon_device_register(NULL); | |
976 | if (IS_ERR(hwmon->device)) { | |
977 | result = PTR_ERR(hwmon->device); | |
978 | goto free_mem; | |
979 | } | |
0e968a3b | 980 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
981 | result = device_create_file(hwmon->device, &dev_attr_name); |
982 | if (result) | |
b299eb5c | 983 | goto free_mem; |
e68b16ab ZR |
984 | |
985 | register_sys_interface: | |
31f5396a JD |
986 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
987 | if (!temp) { | |
988 | result = -ENOMEM; | |
989 | goto unregister_name; | |
990 | } | |
991 | ||
992 | temp->tz = tz; | |
e68b16ab ZR |
993 | hwmon->count++; |
994 | ||
79a49168 | 995 | snprintf(temp->temp_input.name, sizeof(temp->temp_input.name), |
e68b16ab | 996 | "temp%d_input", hwmon->count); |
31f5396a JD |
997 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
998 | temp->temp_input.attr.attr.mode = 0444; | |
999 | temp->temp_input.attr.show = temp_input_show; | |
1000 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
1001 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 1002 | if (result) |
31f5396a | 1003 | goto free_temp_mem; |
e68b16ab ZR |
1004 | |
1005 | if (tz->ops->get_crit_temp) { | |
1006 | unsigned long temperature; | |
1007 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
79a49168 GR |
1008 | snprintf(temp->temp_crit.name, |
1009 | sizeof(temp->temp_crit.name), | |
e68b16ab | 1010 | "temp%d_crit", hwmon->count); |
31f5396a JD |
1011 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
1012 | temp->temp_crit.attr.attr.mode = 0444; | |
1013 | temp->temp_crit.attr.show = temp_crit_show; | |
1014 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 1015 | result = device_create_file(hwmon->device, |
31f5396a | 1016 | &temp->temp_crit.attr); |
e68b16ab | 1017 | if (result) |
b299eb5c | 1018 | goto unregister_input; |
e68b16ab ZR |
1019 | } |
1020 | } | |
1021 | ||
1022 | mutex_lock(&thermal_list_lock); | |
1023 | if (new_hwmon_device) | |
1024 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 1025 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
1026 | mutex_unlock(&thermal_list_lock); |
1027 | ||
1028 | return 0; | |
1029 | ||
b299eb5c | 1030 | unregister_input: |
31f5396a JD |
1031 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
1032 | free_temp_mem: | |
1033 | kfree(temp); | |
b299eb5c | 1034 | unregister_name: |
e68b16ab ZR |
1035 | if (new_hwmon_device) { |
1036 | device_remove_file(hwmon->device, &dev_attr_name); | |
1037 | hwmon_device_unregister(hwmon->device); | |
1038 | } | |
1039 | free_mem: | |
1040 | if (new_hwmon_device) | |
1041 | kfree(hwmon); | |
1042 | ||
1043 | return result; | |
1044 | } | |
1045 | ||
1046 | static void | |
1047 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
1048 | { | |
31f5396a JD |
1049 | struct thermal_hwmon_device *hwmon; |
1050 | struct thermal_hwmon_temp *temp; | |
1051 | ||
1052 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
1053 | if (unlikely(!hwmon)) { | |
1054 | /* Should never happen... */ | |
1055 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
1056 | return; | |
1057 | } | |
1058 | ||
1059 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
1060 | if (unlikely(!temp)) { | |
1061 | /* Should never happen... */ | |
1062 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
1063 | return; | |
1064 | } | |
e68b16ab | 1065 | |
31f5396a | 1066 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 1067 | if (tz->ops->get_crit_temp) |
31f5396a | 1068 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
1069 | |
1070 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
1071 | list_del(&temp->hwmon_node); |
1072 | kfree(temp); | |
e68b16ab ZR |
1073 | if (!list_empty(&hwmon->tz_list)) { |
1074 | mutex_unlock(&thermal_list_lock); | |
1075 | return; | |
1076 | } | |
1077 | list_del(&hwmon->node); | |
1078 | mutex_unlock(&thermal_list_lock); | |
1079 | ||
1080 | device_remove_file(hwmon->device, &dev_attr_name); | |
1081 | hwmon_device_unregister(hwmon->device); | |
1082 | kfree(hwmon); | |
1083 | } | |
1084 | #else | |
1085 | static int | |
1086 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
1087 | { | |
1088 | return 0; | |
1089 | } | |
1090 | ||
1091 | static void | |
1092 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
1093 | { | |
1094 | } | |
1095 | #endif | |
1096 | ||
203d3d4a ZR |
1097 | /** |
1098 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
1099 | * @tz: thermal zone device |
1100 | * @trip: indicates which trip point the cooling devices is | |
1101 | * associated with in this thermal zone. | |
1102 | * @cdev: thermal cooling device | |
543a9561 LB |
1103 | * |
1104 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
1105 | */ |
1106 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
1107 | int trip, | |
9d99842f ZR |
1108 | struct thermal_cooling_device *cdev, |
1109 | unsigned long upper, unsigned long lower) | |
203d3d4a | 1110 | { |
b81b6ba3 ZR |
1111 | struct thermal_instance *dev; |
1112 | struct thermal_instance *pos; | |
c7516709 TS |
1113 | struct thermal_zone_device *pos1; |
1114 | struct thermal_cooling_device *pos2; | |
74051ba5 | 1115 | unsigned long max_state; |
203d3d4a ZR |
1116 | int result; |
1117 | ||
543a9561 | 1118 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
1119 | return -EINVAL; |
1120 | ||
c7516709 TS |
1121 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
1122 | if (pos1 == tz) | |
1123 | break; | |
1124 | } | |
1125 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
1126 | if (pos2 == cdev) | |
1127 | break; | |
1128 | } | |
1129 | ||
1130 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
1131 | return -EINVAL; |
1132 | ||
9d99842f ZR |
1133 | cdev->ops->get_max_state(cdev, &max_state); |
1134 | ||
1135 | /* lower default 0, upper default max_state */ | |
1136 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
1137 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
1138 | ||
1139 | if (lower > upper || upper > max_state) | |
1140 | return -EINVAL; | |
1141 | ||
203d3d4a | 1142 | dev = |
b81b6ba3 | 1143 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
1144 | if (!dev) |
1145 | return -ENOMEM; | |
1146 | dev->tz = tz; | |
1147 | dev->cdev = cdev; | |
1148 | dev->trip = trip; | |
9d99842f ZR |
1149 | dev->upper = upper; |
1150 | dev->lower = lower; | |
ce119f83 | 1151 | dev->target = THERMAL_NO_TARGET; |
74051ba5 | 1152 | |
203d3d4a ZR |
1153 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
1154 | if (result) | |
1155 | goto free_mem; | |
1156 | ||
1157 | sprintf(dev->name, "cdev%d", dev->id); | |
1158 | result = | |
1159 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
1160 | if (result) | |
1161 | goto release_idr; | |
1162 | ||
1163 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 1164 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
1165 | dev->attr.attr.name = dev->attr_name; |
1166 | dev->attr.attr.mode = 0444; | |
1167 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
1168 | result = device_create_file(&tz->device, &dev->attr); | |
1169 | if (result) | |
1170 | goto remove_symbol_link; | |
1171 | ||
1172 | mutex_lock(&tz->lock); | |
f4a821ce | 1173 | mutex_lock(&cdev->lock); |
cddf31b3 | 1174 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
1175 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
1176 | result = -EEXIST; | |
1177 | break; | |
1178 | } | |
b5e4ae62 | 1179 | if (!result) { |
cddf31b3 | 1180 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 ZR |
1181 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
1182 | } | |
f4a821ce | 1183 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1184 | mutex_unlock(&tz->lock); |
1185 | ||
1186 | if (!result) | |
1187 | return 0; | |
1188 | ||
1189 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 1190 | remove_symbol_link: |
203d3d4a | 1191 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 1192 | release_idr: |
203d3d4a | 1193 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 1194 | free_mem: |
203d3d4a ZR |
1195 | kfree(dev); |
1196 | return result; | |
1197 | } | |
1198 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); | |
1199 | ||
1200 | /** | |
1201 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
1202 | * @tz: thermal zone device |
1203 | * @trip: indicates which trip point the cooling devices is | |
1204 | * associated with in this thermal zone. | |
1205 | * @cdev: thermal cooling device | |
543a9561 LB |
1206 | * |
1207 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
1208 | */ |
1209 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
1210 | int trip, | |
1211 | struct thermal_cooling_device *cdev) | |
1212 | { | |
b81b6ba3 | 1213 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
1214 | |
1215 | mutex_lock(&tz->lock); | |
f4a821ce | 1216 | mutex_lock(&cdev->lock); |
cddf31b3 | 1217 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 1218 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 1219 | list_del(&pos->tz_node); |
b5e4ae62 | 1220 | list_del(&pos->cdev_node); |
f4a821ce | 1221 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1222 | mutex_unlock(&tz->lock); |
1223 | goto unbind; | |
1224 | } | |
1225 | } | |
f4a821ce | 1226 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1227 | mutex_unlock(&tz->lock); |
1228 | ||
1229 | return -ENODEV; | |
1230 | ||
caca8b80 | 1231 | unbind: |
203d3d4a ZR |
1232 | device_remove_file(&tz->device, &pos->attr); |
1233 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
1234 | release_idr(&tz->idr, &tz->lock, pos->id); | |
1235 | kfree(pos); | |
1236 | return 0; | |
1237 | } | |
1238 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); | |
1239 | ||
1240 | static void thermal_release(struct device *dev) | |
1241 | { | |
1242 | struct thermal_zone_device *tz; | |
1243 | struct thermal_cooling_device *cdev; | |
1244 | ||
caca8b80 JP |
1245 | if (!strncmp(dev_name(dev), "thermal_zone", |
1246 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
1247 | tz = to_thermal_zone(dev); |
1248 | kfree(tz); | |
1249 | } else { | |
1250 | cdev = to_cooling_device(dev); | |
1251 | kfree(cdev); | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | static struct class thermal_class = { | |
1256 | .name = "thermal", | |
1257 | .dev_release = thermal_release, | |
1258 | }; | |
1259 | ||
1260 | /** | |
1261 | * thermal_cooling_device_register - register a new thermal cooling device | |
1262 | * @type: the thermal cooling device type. | |
1263 | * @devdata: device private data. | |
1264 | * @ops: standard thermal cooling devices callbacks. | |
1265 | */ | |
caca8b80 JP |
1266 | struct thermal_cooling_device * |
1267 | thermal_cooling_device_register(char *type, void *devdata, | |
1268 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
1269 | { |
1270 | struct thermal_cooling_device *cdev; | |
203d3d4a ZR |
1271 | int result; |
1272 | ||
204dd1d3 | 1273 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1274 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1275 | |
1276 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 1277 | !ops->set_cur_state) |
3e6fda5c | 1278 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1279 | |
1280 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
1281 | if (!cdev) | |
3e6fda5c | 1282 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1283 | |
1284 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
1285 | if (result) { | |
1286 | kfree(cdev); | |
3e6fda5c | 1287 | return ERR_PTR(result); |
203d3d4a ZR |
1288 | } |
1289 | ||
204dd1d3 | 1290 | strcpy(cdev->type, type ? : ""); |
f4a821ce | 1291 | mutex_init(&cdev->lock); |
b5e4ae62 | 1292 | INIT_LIST_HEAD(&cdev->thermal_instances); |
203d3d4a | 1293 | cdev->ops = ops; |
ce119f83 | 1294 | cdev->updated = true; |
203d3d4a ZR |
1295 | cdev->device.class = &thermal_class; |
1296 | cdev->devdata = devdata; | |
354655ea | 1297 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
1298 | result = device_register(&cdev->device); |
1299 | if (result) { | |
1300 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1301 | kfree(cdev); | |
3e6fda5c | 1302 | return ERR_PTR(result); |
203d3d4a ZR |
1303 | } |
1304 | ||
1305 | /* sys I/F */ | |
1306 | if (type) { | |
543a9561 | 1307 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1308 | if (result) |
1309 | goto unregister; | |
1310 | } | |
1311 | ||
1312 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
1313 | if (result) | |
1314 | goto unregister; | |
1315 | ||
1316 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
1317 | if (result) | |
1318 | goto unregister; | |
1319 | ||
7e8ee1e9 | 1320 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
1321 | mutex_lock(&thermal_list_lock); |
1322 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
1323 | mutex_unlock(&thermal_list_lock); |
1324 | ||
7e8ee1e9 D |
1325 | /* Update binding information for 'this' new cdev */ |
1326 | bind_cdev(cdev); | |
1327 | ||
1328 | return cdev; | |
203d3d4a | 1329 | |
caca8b80 | 1330 | unregister: |
203d3d4a ZR |
1331 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1332 | device_unregister(&cdev->device); | |
3e6fda5c | 1333 | return ERR_PTR(result); |
203d3d4a ZR |
1334 | } |
1335 | EXPORT_SYMBOL(thermal_cooling_device_register); | |
1336 | ||
1337 | /** | |
1338 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1339 | * @cdev: the thermal cooling device to remove. |
1340 | * | |
1341 | * thermal_cooling_device_unregister() must be called when the device is no | |
1342 | * longer needed. | |
1343 | */ | |
7e8ee1e9 | 1344 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1345 | { |
7e8ee1e9 D |
1346 | int i; |
1347 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1348 | struct thermal_zone_device *tz; |
1349 | struct thermal_cooling_device *pos = NULL; | |
1350 | ||
1351 | if (!cdev) | |
1352 | return; | |
1353 | ||
1354 | mutex_lock(&thermal_list_lock); | |
1355 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1356 | if (pos == cdev) | |
1357 | break; | |
1358 | if (pos != cdev) { | |
1359 | /* thermal cooling device not found */ | |
1360 | mutex_unlock(&thermal_list_lock); | |
1361 | return; | |
1362 | } | |
1363 | list_del(&cdev->node); | |
7e8ee1e9 D |
1364 | |
1365 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1366 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1367 | if (tz->ops->unbind) { |
1368 | tz->ops->unbind(tz, cdev); | |
1369 | continue; | |
1370 | } | |
1371 | ||
1372 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1373 | continue; |
7e8ee1e9 D |
1374 | |
1375 | tzp = tz->tzp; | |
1376 | for (i = 0; i < tzp->num_tbps; i++) { | |
1377 | if (tzp->tbp[i].cdev == cdev) { | |
1378 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1379 | tzp->tbp[i].cdev = NULL; | |
1380 | } | |
1381 | } | |
203d3d4a | 1382 | } |
7e8ee1e9 | 1383 | |
203d3d4a | 1384 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1385 | |
203d3d4a | 1386 | if (cdev->type[0]) |
543a9561 | 1387 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1388 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1389 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1390 | ||
1391 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1392 | device_unregister(&cdev->device); | |
1393 | return; | |
1394 | } | |
1395 | EXPORT_SYMBOL(thermal_cooling_device_unregister); | |
1396 | ||
dc765482 | 1397 | void thermal_cdev_update(struct thermal_cooling_device *cdev) |
ce119f83 ZR |
1398 | { |
1399 | struct thermal_instance *instance; | |
1400 | unsigned long target = 0; | |
1401 | ||
1402 | /* cooling device is updated*/ | |
1403 | if (cdev->updated) | |
1404 | return; | |
1405 | ||
f4a821ce | 1406 | mutex_lock(&cdev->lock); |
ce119f83 ZR |
1407 | /* Make sure cdev enters the deepest cooling state */ |
1408 | list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { | |
1409 | if (instance->target == THERMAL_NO_TARGET) | |
1410 | continue; | |
1411 | if (instance->target > target) | |
1412 | target = instance->target; | |
1413 | } | |
f4a821ce | 1414 | mutex_unlock(&cdev->lock); |
ce119f83 ZR |
1415 | cdev->ops->set_cur_state(cdev, target); |
1416 | cdev->updated = true; | |
1417 | } | |
dc765482 | 1418 | EXPORT_SYMBOL(thermal_cdev_update); |
ce119f83 | 1419 | |
f2b4caaf D |
1420 | /** |
1421 | * notify_thermal_framework - Sensor drivers use this API to notify framework | |
1422 | * @tz: thermal zone device | |
1423 | * @trip: indicates which trip point has been crossed | |
1424 | * | |
1425 | * This function handles the trip events from sensor drivers. It starts | |
1426 | * throttling the cooling devices according to the policy configured. | |
1427 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
1428 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
1429 | * The throttling policy is based on the configured platform data; if no | |
1430 | * platform data is provided, this uses the step_wise throttling policy. | |
1431 | */ | |
1432 | void notify_thermal_framework(struct thermal_zone_device *tz, int trip) | |
1433 | { | |
1434 | handle_thermal_trip(tz, trip); | |
1435 | } | |
1436 | EXPORT_SYMBOL(notify_thermal_framework); | |
1437 | ||
c56f5c03 D |
1438 | /** |
1439 | * create_trip_attrs - create attributes for trip points | |
1440 | * @tz: the thermal zone device | |
1441 | * @mask: Writeable trip point bitmap. | |
1442 | */ | |
1443 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1444 | { | |
1445 | int indx; | |
27365a6c | 1446 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1447 | |
27365a6c | 1448 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1449 | if (!tz->trip_type_attrs) |
1450 | return -ENOMEM; | |
1451 | ||
27365a6c | 1452 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1453 | if (!tz->trip_temp_attrs) { |
1454 | kfree(tz->trip_type_attrs); | |
1455 | return -ENOMEM; | |
1456 | } | |
1457 | ||
27365a6c D |
1458 | if (tz->ops->get_trip_hyst) { |
1459 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1460 | if (!tz->trip_hyst_attrs) { | |
1461 | kfree(tz->trip_type_attrs); | |
1462 | kfree(tz->trip_temp_attrs); | |
1463 | return -ENOMEM; | |
1464 | } | |
1465 | } | |
c56f5c03 | 1466 | |
27365a6c D |
1467 | |
1468 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1469 | /* create trip type attribute */ |
1470 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1471 | "trip_point_%d_type", indx); | |
1472 | ||
1473 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1474 | tz->trip_type_attrs[indx].attr.attr.name = | |
1475 | tz->trip_type_attrs[indx].name; | |
1476 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1477 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1478 | ||
1479 | device_create_file(&tz->device, | |
1480 | &tz->trip_type_attrs[indx].attr); | |
1481 | ||
1482 | /* create trip temp attribute */ | |
1483 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1484 | "trip_point_%d_temp", indx); | |
1485 | ||
1486 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1487 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1488 | tz->trip_temp_attrs[indx].name; | |
1489 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1490 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1491 | if (mask & (1 << indx)) { | |
1492 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1493 | tz->trip_temp_attrs[indx].attr.store = | |
1494 | trip_point_temp_store; | |
1495 | } | |
1496 | ||
1497 | device_create_file(&tz->device, | |
1498 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1499 | |
1500 | /* create Optional trip hyst attribute */ | |
1501 | if (!tz->ops->get_trip_hyst) | |
1502 | continue; | |
1503 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1504 | "trip_point_%d_hyst", indx); | |
1505 | ||
1506 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1507 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1508 | tz->trip_hyst_attrs[indx].name; | |
1509 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1510 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1511 | if (tz->ops->set_trip_hyst) { | |
1512 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1513 | tz->trip_hyst_attrs[indx].attr.store = | |
1514 | trip_point_hyst_store; | |
1515 | } | |
1516 | ||
1517 | device_create_file(&tz->device, | |
1518 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1519 | } |
1520 | return 0; | |
1521 | } | |
1522 | ||
1523 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1524 | { | |
1525 | int indx; | |
1526 | ||
1527 | for (indx = 0; indx < tz->trips; indx++) { | |
1528 | device_remove_file(&tz->device, | |
1529 | &tz->trip_type_attrs[indx].attr); | |
1530 | device_remove_file(&tz->device, | |
1531 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1532 | if (tz->ops->get_trip_hyst) |
1533 | device_remove_file(&tz->device, | |
1534 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1535 | } |
1536 | kfree(tz->trip_type_attrs); | |
1537 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1538 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1539 | } |
1540 | ||
203d3d4a ZR |
1541 | /** |
1542 | * thermal_zone_device_register - register a new thermal zone device | |
1543 | * @type: the thermal zone device type | |
1544 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1545 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1546 | * @devdata: private device data |
1547 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1548 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1549 | * @passive_delay: number of milliseconds to wait between polls when |
1550 | * performing passive cooling | |
1551 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1552 | * whether trip points have been crossed (0 for interrupt | |
1553 | * driven systems) | |
203d3d4a ZR |
1554 | * |
1555 | * thermal_zone_device_unregister() must be called when the device is no | |
1b7ddb84 | 1556 | * longer needed. The passive cooling depends on the .get_trend() return value. |
203d3d4a | 1557 | */ |
4b1bf587 | 1558 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1559 | int trips, int mask, void *devdata, |
5b275ce2 | 1560 | const struct thermal_zone_device_ops *ops, |
50125a9b | 1561 | const struct thermal_zone_params *tzp, |
1b7ddb84 | 1562 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1563 | { |
1564 | struct thermal_zone_device *tz; | |
03a971a2 | 1565 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1566 | int result; |
1567 | int count; | |
03a971a2 | 1568 | int passive = 0; |
203d3d4a | 1569 | |
204dd1d3 | 1570 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1571 | return ERR_PTR(-EINVAL); |
203d3d4a | 1572 | |
c56f5c03 | 1573 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1574 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1575 | |
1576 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1577 | return ERR_PTR(-EINVAL); |
203d3d4a | 1578 | |
6b2aa51d EV |
1579 | if (trips > 0 && !ops->get_trip_type) |
1580 | return ERR_PTR(-EINVAL); | |
1581 | ||
203d3d4a ZR |
1582 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1583 | if (!tz) | |
3e6fda5c | 1584 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1585 | |
2d374139 | 1586 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1587 | idr_init(&tz->idr); |
1588 | mutex_init(&tz->lock); | |
1589 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1590 | if (result) { | |
1591 | kfree(tz); | |
3e6fda5c | 1592 | return ERR_PTR(result); |
203d3d4a ZR |
1593 | } |
1594 | ||
204dd1d3 | 1595 | strcpy(tz->type, type ? : ""); |
203d3d4a | 1596 | tz->ops = ops; |
50125a9b | 1597 | tz->tzp = tzp; |
203d3d4a ZR |
1598 | tz->device.class = &thermal_class; |
1599 | tz->devdata = devdata; | |
1600 | tz->trips = trips; | |
b1569e99 MG |
1601 | tz->passive_delay = passive_delay; |
1602 | tz->polling_delay = polling_delay; | |
1603 | ||
354655ea | 1604 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1605 | result = device_register(&tz->device); |
1606 | if (result) { | |
1607 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1608 | kfree(tz); | |
3e6fda5c | 1609 | return ERR_PTR(result); |
203d3d4a ZR |
1610 | } |
1611 | ||
1612 | /* sys I/F */ | |
1613 | if (type) { | |
1614 | result = device_create_file(&tz->device, &dev_attr_type); | |
1615 | if (result) | |
1616 | goto unregister; | |
1617 | } | |
1618 | ||
1619 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1620 | if (result) | |
1621 | goto unregister; | |
1622 | ||
1623 | if (ops->get_mode) { | |
1624 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1625 | if (result) | |
1626 | goto unregister; | |
1627 | } | |
1628 | ||
c56f5c03 D |
1629 | result = create_trip_attrs(tz, mask); |
1630 | if (result) | |
1631 | goto unregister; | |
1632 | ||
203d3d4a | 1633 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1634 | tz->ops->get_trip_type(tz, count, &trip_type); |
1635 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1636 | passive = 1; | |
203d3d4a ZR |
1637 | } |
1638 | ||
5a2c090b D |
1639 | if (!passive) { |
1640 | result = device_create_file(&tz->device, &dev_attr_passive); | |
1641 | if (result) | |
1642 | goto unregister; | |
1643 | } | |
03a971a2 | 1644 | |
e6e238c3 ADK |
1645 | #ifdef CONFIG_THERMAL_EMULATION |
1646 | result = device_create_file(&tz->device, &dev_attr_emul_temp); | |
1647 | if (result) | |
1648 | goto unregister; | |
1649 | #endif | |
5a2c090b D |
1650 | /* Create policy attribute */ |
1651 | result = device_create_file(&tz->device, &dev_attr_policy); | |
03a971a2 MG |
1652 | if (result) |
1653 | goto unregister; | |
1654 | ||
a4a15485 D |
1655 | /* Update 'this' zone's governor information */ |
1656 | mutex_lock(&thermal_governor_lock); | |
1657 | ||
1658 | if (tz->tzp) | |
1659 | tz->governor = __find_governor(tz->tzp->governor_name); | |
1660 | else | |
1661 | tz->governor = __find_governor(DEFAULT_THERMAL_GOVERNOR); | |
1662 | ||
1663 | mutex_unlock(&thermal_governor_lock); | |
1664 | ||
e68b16ab ZR |
1665 | result = thermal_add_hwmon_sysfs(tz); |
1666 | if (result) | |
1667 | goto unregister; | |
1668 | ||
203d3d4a ZR |
1669 | mutex_lock(&thermal_list_lock); |
1670 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1671 | mutex_unlock(&thermal_list_lock); |
1672 | ||
7e8ee1e9 D |
1673 | /* Bind cooling devices for this zone */ |
1674 | bind_tz(tz); | |
1675 | ||
b1569e99 MG |
1676 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1677 | ||
1678 | thermal_zone_device_update(tz); | |
1679 | ||
203d3d4a ZR |
1680 | if (!result) |
1681 | return tz; | |
1682 | ||
caca8b80 | 1683 | unregister: |
203d3d4a ZR |
1684 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1685 | device_unregister(&tz->device); | |
3e6fda5c | 1686 | return ERR_PTR(result); |
203d3d4a ZR |
1687 | } |
1688 | EXPORT_SYMBOL(thermal_zone_device_register); | |
1689 | ||
1690 | /** | |
1691 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1692 | * @tz: the thermal zone device to remove |
1693 | */ | |
1694 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1695 | { | |
7e8ee1e9 D |
1696 | int i; |
1697 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1698 | struct thermal_cooling_device *cdev; |
1699 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1700 | |
1701 | if (!tz) | |
1702 | return; | |
1703 | ||
7e8ee1e9 D |
1704 | tzp = tz->tzp; |
1705 | ||
203d3d4a ZR |
1706 | mutex_lock(&thermal_list_lock); |
1707 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1708 | if (pos == tz) | |
1709 | break; | |
1710 | if (pos != tz) { | |
1711 | /* thermal zone device not found */ | |
1712 | mutex_unlock(&thermal_list_lock); | |
1713 | return; | |
1714 | } | |
1715 | list_del(&tz->node); | |
7e8ee1e9 D |
1716 | |
1717 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1718 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1719 | if (tz->ops->unbind) { | |
1720 | tz->ops->unbind(tz, cdev); | |
1721 | continue; | |
1722 | } | |
1723 | ||
1724 | if (!tzp || !tzp->tbp) | |
1725 | break; | |
1726 | ||
1727 | for (i = 0; i < tzp->num_tbps; i++) { | |
1728 | if (tzp->tbp[i].cdev == cdev) { | |
1729 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1730 | tzp->tbp[i].cdev = NULL; | |
1731 | } | |
1732 | } | |
1733 | } | |
1734 | ||
203d3d4a ZR |
1735 | mutex_unlock(&thermal_list_lock); |
1736 | ||
b1569e99 MG |
1737 | thermal_zone_device_set_polling(tz, 0); |
1738 | ||
203d3d4a ZR |
1739 | if (tz->type[0]) |
1740 | device_remove_file(&tz->device, &dev_attr_type); | |
1741 | device_remove_file(&tz->device, &dev_attr_temp); | |
1742 | if (tz->ops->get_mode) | |
1743 | device_remove_file(&tz->device, &dev_attr_mode); | |
5a2c090b | 1744 | device_remove_file(&tz->device, &dev_attr_policy); |
c56f5c03 | 1745 | remove_trip_attrs(tz); |
a4a15485 | 1746 | tz->governor = NULL; |
203d3d4a | 1747 | |
e68b16ab | 1748 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1749 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1750 | idr_destroy(&tz->idr); | |
1751 | mutex_destroy(&tz->lock); | |
1752 | device_unregister(&tz->device); | |
1753 | return; | |
1754 | } | |
1755 | EXPORT_SYMBOL(thermal_zone_device_unregister); | |
1756 | ||
63c4d919 EV |
1757 | /** |
1758 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
1759 | * @name: thermal zone name to fetch the temperature | |
1760 | * | |
1761 | * When only one zone is found with the passed name, returns a reference to it. | |
1762 | * | |
1763 | * Return: On success returns a reference to an unique thermal zone with | |
1764 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
1765 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
1766 | */ | |
1767 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
1768 | { | |
1769 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
1770 | unsigned int found = 0; | |
1771 | ||
1772 | if (!name) | |
1773 | goto exit; | |
1774 | ||
1775 | mutex_lock(&thermal_list_lock); | |
1776 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1777 | if (!strnicmp(name, pos->type, THERMAL_NAME_LENGTH)) { | |
1778 | found++; | |
1779 | ref = pos; | |
1780 | } | |
1781 | mutex_unlock(&thermal_list_lock); | |
1782 | ||
1783 | /* nothing has been found, thus an error code for it */ | |
1784 | if (found == 0) | |
1785 | ref = ERR_PTR(-ENODEV); | |
1786 | else if (found > 1) | |
1787 | /* Success only when an unique zone is found */ | |
1788 | ref = ERR_PTR(-EEXIST); | |
1789 | ||
1790 | exit: | |
1791 | return ref; | |
1792 | } | |
1793 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
1794 | ||
af06216a RW |
1795 | #ifdef CONFIG_NET |
1796 | static struct genl_family thermal_event_genl_family = { | |
1797 | .id = GENL_ID_GENERATE, | |
1798 | .name = THERMAL_GENL_FAMILY_NAME, | |
1799 | .version = THERMAL_GENL_VERSION, | |
1800 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1801 | }; | |
1802 | ||
1803 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1804 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1805 | }; | |
1806 | ||
8ab3e6a0 EV |
1807 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
1808 | enum events event) | |
4cb18728 D |
1809 | { |
1810 | struct sk_buff *skb; | |
1811 | struct nlattr *attr; | |
1812 | struct thermal_genl_event *thermal_event; | |
1813 | void *msg_header; | |
1814 | int size; | |
1815 | int result; | |
b11de07c | 1816 | static unsigned int thermal_event_seqnum; |
4cb18728 | 1817 | |
8ab3e6a0 EV |
1818 | if (!tz) |
1819 | return -EINVAL; | |
1820 | ||
4cb18728 | 1821 | /* allocate memory */ |
886ee546 JP |
1822 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1823 | nla_total_size(0); | |
4cb18728 D |
1824 | |
1825 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1826 | if (!skb) | |
1827 | return -ENOMEM; | |
1828 | ||
1829 | /* add the genetlink message header */ | |
1830 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1831 | &thermal_event_genl_family, 0, | |
1832 | THERMAL_GENL_CMD_EVENT); | |
1833 | if (!msg_header) { | |
1834 | nlmsg_free(skb); | |
1835 | return -ENOMEM; | |
1836 | } | |
1837 | ||
1838 | /* fill the data */ | |
886ee546 JP |
1839 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1840 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1841 | |
1842 | if (!attr) { | |
1843 | nlmsg_free(skb); | |
1844 | return -EINVAL; | |
1845 | } | |
1846 | ||
1847 | thermal_event = nla_data(attr); | |
1848 | if (!thermal_event) { | |
1849 | nlmsg_free(skb); | |
1850 | return -EINVAL; | |
1851 | } | |
1852 | ||
1853 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1854 | ||
8ab3e6a0 | 1855 | thermal_event->orig = tz->id; |
4cb18728 D |
1856 | thermal_event->event = event; |
1857 | ||
1858 | /* send multicast genetlink message */ | |
1859 | result = genlmsg_end(skb, msg_header); | |
1860 | if (result < 0) { | |
1861 | nlmsg_free(skb); | |
1862 | return result; | |
1863 | } | |
1864 | ||
1865 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1866 | if (result) | |
923e0b1e | 1867 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
1868 | |
1869 | return result; | |
1870 | } | |
2d58d7ea | 1871 | EXPORT_SYMBOL(thermal_generate_netlink_event); |
4cb18728 D |
1872 | |
1873 | static int genetlink_init(void) | |
1874 | { | |
1875 | int result; | |
1876 | ||
1877 | result = genl_register_family(&thermal_event_genl_family); | |
1878 | if (result) | |
1879 | return result; | |
1880 | ||
1881 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1882 | &thermal_event_mcgrp); | |
1883 | if (result) | |
1884 | genl_unregister_family(&thermal_event_genl_family); | |
1885 | return result; | |
1886 | } | |
1887 | ||
af06216a RW |
1888 | static void genetlink_exit(void) |
1889 | { | |
1890 | genl_unregister_family(&thermal_event_genl_family); | |
1891 | } | |
1892 | #else /* !CONFIG_NET */ | |
1893 | static inline int genetlink_init(void) { return 0; } | |
1894 | static inline void genetlink_exit(void) {} | |
1895 | #endif /* !CONFIG_NET */ | |
1896 | ||
80a26a5c ZR |
1897 | static int __init thermal_register_governors(void) |
1898 | { | |
1899 | int result; | |
1900 | ||
1901 | result = thermal_gov_step_wise_register(); | |
1902 | if (result) | |
1903 | return result; | |
1904 | ||
1905 | result = thermal_gov_fair_share_register(); | |
1906 | if (result) | |
1907 | return result; | |
1908 | ||
1909 | return thermal_gov_user_space_register(); | |
1910 | } | |
1911 | ||
1912 | static void thermal_unregister_governors(void) | |
1913 | { | |
1914 | thermal_gov_step_wise_unregister(); | |
1915 | thermal_gov_fair_share_unregister(); | |
1916 | thermal_gov_user_space_unregister(); | |
1917 | } | |
1918 | ||
203d3d4a ZR |
1919 | static int __init thermal_init(void) |
1920 | { | |
80a26a5c ZR |
1921 | int result; |
1922 | ||
1923 | result = thermal_register_governors(); | |
1924 | if (result) | |
1925 | goto error; | |
203d3d4a ZR |
1926 | |
1927 | result = class_register(&thermal_class); | |
80a26a5c ZR |
1928 | if (result) |
1929 | goto unregister_governors; | |
1930 | ||
4cb18728 | 1931 | result = genetlink_init(); |
80a26a5c ZR |
1932 | if (result) |
1933 | goto unregister_class; | |
1934 | ||
1935 | return 0; | |
1936 | ||
1937 | unregister_governors: | |
1938 | thermal_unregister_governors(); | |
1939 | unregister_class: | |
1940 | class_unregister(&thermal_class); | |
1941 | error: | |
1942 | idr_destroy(&thermal_tz_idr); | |
1943 | idr_destroy(&thermal_cdev_idr); | |
1944 | mutex_destroy(&thermal_idr_lock); | |
1945 | mutex_destroy(&thermal_list_lock); | |
1946 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
1947 | return result; |
1948 | } | |
1949 | ||
1950 | static void __exit thermal_exit(void) | |
1951 | { | |
80a26a5c | 1952 | genetlink_exit(); |
203d3d4a | 1953 | class_unregister(&thermal_class); |
80a26a5c | 1954 | thermal_unregister_governors(); |
203d3d4a ZR |
1955 | idr_destroy(&thermal_tz_idr); |
1956 | idr_destroy(&thermal_cdev_idr); | |
1957 | mutex_destroy(&thermal_idr_lock); | |
1958 | mutex_destroy(&thermal_list_lock); | |
80a26a5c | 1959 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
1960 | } |
1961 | ||
4cb18728 | 1962 | fs_initcall(thermal_init); |
203d3d4a | 1963 | module_exit(thermal_exit); |