Root/
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 | |
26 | #include <linux/module.h> |
27 | #include <linux/device.h> |
28 | #include <linux/err.h> |
29 | #include <linux/slab.h> |
30 | #include <linux/kdev_t.h> |
31 | #include <linux/idr.h> |
32 | #include <linux/thermal.h> |
33 | #include <linux/spinlock.h> |
34 | #include <linux/reboot.h> |
35 | #include <net/netlink.h> |
36 | #include <net/genetlink.h> |
37 | |
38 | MODULE_AUTHOR("Zhang Rui"); |
39 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
40 | MODULE_LICENSE("GPL"); |
41 | |
42 | #define PREFIX "Thermal: " |
43 | |
44 | struct thermal_cooling_device_instance { |
45 | int id; |
46 | char name[THERMAL_NAME_LENGTH]; |
47 | struct thermal_zone_device *tz; |
48 | struct thermal_cooling_device *cdev; |
49 | int trip; |
50 | char attr_name[THERMAL_NAME_LENGTH]; |
51 | struct device_attribute attr; |
52 | struct list_head node; |
53 | }; |
54 | |
55 | static DEFINE_IDR(thermal_tz_idr); |
56 | static DEFINE_IDR(thermal_cdev_idr); |
57 | static DEFINE_MUTEX(thermal_idr_lock); |
58 | |
59 | static LIST_HEAD(thermal_tz_list); |
60 | static LIST_HEAD(thermal_cdev_list); |
61 | static DEFINE_MUTEX(thermal_list_lock); |
62 | |
63 | static unsigned int thermal_event_seqnum; |
64 | |
65 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) |
66 | { |
67 | int err; |
68 | |
69 | again: |
70 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) |
71 | return -ENOMEM; |
72 | |
73 | if (lock) |
74 | mutex_lock(lock); |
75 | err = idr_get_new(idr, NULL, id); |
76 | if (lock) |
77 | mutex_unlock(lock); |
78 | if (unlikely(err == -EAGAIN)) |
79 | goto again; |
80 | else if (unlikely(err)) |
81 | return err; |
82 | |
83 | *id = *id & MAX_ID_MASK; |
84 | return 0; |
85 | } |
86 | |
87 | static void release_idr(struct idr *idr, struct mutex *lock, int id) |
88 | { |
89 | if (lock) |
90 | mutex_lock(lock); |
91 | idr_remove(idr, id); |
92 | if (lock) |
93 | mutex_unlock(lock); |
94 | } |
95 | |
96 | /* sys I/F for thermal zone */ |
97 | |
98 | #define to_thermal_zone(_dev) \ |
99 | container_of(_dev, struct thermal_zone_device, device) |
100 | |
101 | static ssize_t |
102 | type_show(struct device *dev, struct device_attribute *attr, char *buf) |
103 | { |
104 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
105 | |
106 | return sprintf(buf, "%s\n", tz->type); |
107 | } |
108 | |
109 | static ssize_t |
110 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) |
111 | { |
112 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
113 | long temperature; |
114 | int ret; |
115 | |
116 | if (!tz->ops->get_temp) |
117 | return -EPERM; |
118 | |
119 | ret = tz->ops->get_temp(tz, &temperature); |
120 | |
121 | if (ret) |
122 | return ret; |
123 | |
124 | return sprintf(buf, "%ld\n", temperature); |
125 | } |
126 | |
127 | static ssize_t |
128 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) |
129 | { |
130 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
131 | enum thermal_device_mode mode; |
132 | int result; |
133 | |
134 | if (!tz->ops->get_mode) |
135 | return -EPERM; |
136 | |
137 | result = tz->ops->get_mode(tz, &mode); |
138 | if (result) |
139 | return result; |
140 | |
141 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" |
142 | : "disabled"); |
143 | } |
144 | |
145 | static ssize_t |
146 | mode_store(struct device *dev, struct device_attribute *attr, |
147 | const char *buf, size_t count) |
148 | { |
149 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
150 | int result; |
151 | |
152 | if (!tz->ops->set_mode) |
153 | return -EPERM; |
154 | |
155 | if (!strncmp(buf, "enabled", sizeof("enabled"))) |
156 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
157 | else if (!strncmp(buf, "disabled", sizeof("disabled"))) |
158 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
159 | else |
160 | result = -EINVAL; |
161 | |
162 | if (result) |
163 | return result; |
164 | |
165 | return count; |
166 | } |
167 | |
168 | static ssize_t |
169 | trip_point_type_show(struct device *dev, struct device_attribute *attr, |
170 | char *buf) |
171 | { |
172 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
173 | enum thermal_trip_type type; |
174 | int trip, result; |
175 | |
176 | if (!tz->ops->get_trip_type) |
177 | return -EPERM; |
178 | |
179 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) |
180 | return -EINVAL; |
181 | |
182 | result = tz->ops->get_trip_type(tz, trip, &type); |
183 | if (result) |
184 | return result; |
185 | |
186 | switch (type) { |
187 | case THERMAL_TRIP_CRITICAL: |
188 | return sprintf(buf, "critical\n"); |
189 | case THERMAL_TRIP_HOT: |
190 | return sprintf(buf, "hot\n"); |
191 | case THERMAL_TRIP_PASSIVE: |
192 | return sprintf(buf, "passive\n"); |
193 | case THERMAL_TRIP_ACTIVE: |
194 | return sprintf(buf, "active\n"); |
195 | default: |
196 | return sprintf(buf, "unknown\n"); |
197 | } |
198 | } |
199 | |
200 | static ssize_t |
201 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, |
202 | char *buf) |
203 | { |
204 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
205 | int trip, ret; |
206 | long temperature; |
207 | |
208 | if (!tz->ops->get_trip_temp) |
209 | return -EPERM; |
210 | |
211 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) |
212 | return -EINVAL; |
213 | |
214 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
215 | |
216 | if (ret) |
217 | return ret; |
218 | |
219 | return sprintf(buf, "%ld\n", temperature); |
220 | } |
221 | |
222 | static ssize_t |
223 | passive_store(struct device *dev, struct device_attribute *attr, |
224 | const char *buf, size_t count) |
225 | { |
226 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
227 | struct thermal_cooling_device *cdev = NULL; |
228 | int state; |
229 | |
230 | if (!sscanf(buf, "%d\n", &state)) |
231 | return -EINVAL; |
232 | |
233 | /* sanity check: values below 1000 millicelcius don't make sense |
234 | * and can cause the system to go into a thermal heart attack |
235 | */ |
236 | if (state && state < 1000) |
237 | return -EINVAL; |
238 | |
239 | if (state && !tz->forced_passive) { |
240 | mutex_lock(&thermal_list_lock); |
241 | list_for_each_entry(cdev, &thermal_cdev_list, node) { |
242 | if (!strncmp("Processor", cdev->type, |
243 | sizeof("Processor"))) |
244 | thermal_zone_bind_cooling_device(tz, |
245 | THERMAL_TRIPS_NONE, |
246 | cdev); |
247 | } |
248 | mutex_unlock(&thermal_list_lock); |
249 | if (!tz->passive_delay) |
250 | tz->passive_delay = 1000; |
251 | } else if (!state && tz->forced_passive) { |
252 | mutex_lock(&thermal_list_lock); |
253 | list_for_each_entry(cdev, &thermal_cdev_list, node) { |
254 | if (!strncmp("Processor", cdev->type, |
255 | sizeof("Processor"))) |
256 | thermal_zone_unbind_cooling_device(tz, |
257 | THERMAL_TRIPS_NONE, |
258 | cdev); |
259 | } |
260 | mutex_unlock(&thermal_list_lock); |
261 | tz->passive_delay = 0; |
262 | } |
263 | |
264 | tz->tc1 = 1; |
265 | tz->tc2 = 1; |
266 | |
267 | tz->forced_passive = state; |
268 | |
269 | thermal_zone_device_update(tz); |
270 | |
271 | return count; |
272 | } |
273 | |
274 | static ssize_t |
275 | passive_show(struct device *dev, struct device_attribute *attr, |
276 | char *buf) |
277 | { |
278 | struct thermal_zone_device *tz = to_thermal_zone(dev); |
279 | |
280 | return sprintf(buf, "%d\n", tz->forced_passive); |
281 | } |
282 | |
283 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
284 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); |
285 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); |
286 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, \ |
287 | passive_store); |
288 | |
289 | static struct device_attribute trip_point_attrs[] = { |
290 | __ATTR(trip_point_0_type, 0444, trip_point_type_show, NULL), |
291 | __ATTR(trip_point_0_temp, 0444, trip_point_temp_show, NULL), |
292 | __ATTR(trip_point_1_type, 0444, trip_point_type_show, NULL), |
293 | __ATTR(trip_point_1_temp, 0444, trip_point_temp_show, NULL), |
294 | __ATTR(trip_point_2_type, 0444, trip_point_type_show, NULL), |
295 | __ATTR(trip_point_2_temp, 0444, trip_point_temp_show, NULL), |
296 | __ATTR(trip_point_3_type, 0444, trip_point_type_show, NULL), |
297 | __ATTR(trip_point_3_temp, 0444, trip_point_temp_show, NULL), |
298 | __ATTR(trip_point_4_type, 0444, trip_point_type_show, NULL), |
299 | __ATTR(trip_point_4_temp, 0444, trip_point_temp_show, NULL), |
300 | __ATTR(trip_point_5_type, 0444, trip_point_type_show, NULL), |
301 | __ATTR(trip_point_5_temp, 0444, trip_point_temp_show, NULL), |
302 | __ATTR(trip_point_6_type, 0444, trip_point_type_show, NULL), |
303 | __ATTR(trip_point_6_temp, 0444, trip_point_temp_show, NULL), |
304 | __ATTR(trip_point_7_type, 0444, trip_point_type_show, NULL), |
305 | __ATTR(trip_point_7_temp, 0444, trip_point_temp_show, NULL), |
306 | __ATTR(trip_point_8_type, 0444, trip_point_type_show, NULL), |
307 | __ATTR(trip_point_8_temp, 0444, trip_point_temp_show, NULL), |
308 | __ATTR(trip_point_9_type, 0444, trip_point_type_show, NULL), |
309 | __ATTR(trip_point_9_temp, 0444, trip_point_temp_show, NULL), |
310 | __ATTR(trip_point_10_type, 0444, trip_point_type_show, NULL), |
311 | __ATTR(trip_point_10_temp, 0444, trip_point_temp_show, NULL), |
312 | __ATTR(trip_point_11_type, 0444, trip_point_type_show, NULL), |
313 | __ATTR(trip_point_11_temp, 0444, trip_point_temp_show, NULL), |
314 | }; |
315 | |
316 | #define TRIP_POINT_ATTR_ADD(_dev, _index, result) \ |
317 | do { \ |
318 | result = device_create_file(_dev, \ |
319 | &trip_point_attrs[_index * 2]); \ |
320 | if (result) \ |
321 | break; \ |
322 | result = device_create_file(_dev, \ |
323 | &trip_point_attrs[_index * 2 + 1]); \ |
324 | } while (0) |
325 | |
326 | #define TRIP_POINT_ATTR_REMOVE(_dev, _index) \ |
327 | do { \ |
328 | device_remove_file(_dev, &trip_point_attrs[_index * 2]); \ |
329 | device_remove_file(_dev, &trip_point_attrs[_index * 2 + 1]); \ |
330 | } while (0) |
331 | |
332 | /* sys I/F for cooling device */ |
333 | #define to_cooling_device(_dev) \ |
334 | container_of(_dev, struct thermal_cooling_device, device) |
335 | |
336 | static ssize_t |
337 | thermal_cooling_device_type_show(struct device *dev, |
338 | struct device_attribute *attr, char *buf) |
339 | { |
340 | struct thermal_cooling_device *cdev = to_cooling_device(dev); |
341 | |
342 | return sprintf(buf, "%s\n", cdev->type); |
343 | } |
344 | |
345 | static ssize_t |
346 | thermal_cooling_device_max_state_show(struct device *dev, |
347 | struct device_attribute *attr, char *buf) |
348 | { |
349 | struct thermal_cooling_device *cdev = to_cooling_device(dev); |
350 | unsigned long state; |
351 | int ret; |
352 | |
353 | ret = cdev->ops->get_max_state(cdev, &state); |
354 | if (ret) |
355 | return ret; |
356 | return sprintf(buf, "%ld\n", state); |
357 | } |
358 | |
359 | static ssize_t |
360 | thermal_cooling_device_cur_state_show(struct device *dev, |
361 | struct device_attribute *attr, char *buf) |
362 | { |
363 | struct thermal_cooling_device *cdev = to_cooling_device(dev); |
364 | unsigned long state; |
365 | int ret; |
366 | |
367 | ret = cdev->ops->get_cur_state(cdev, &state); |
368 | if (ret) |
369 | return ret; |
370 | return sprintf(buf, "%ld\n", state); |
371 | } |
372 | |
373 | static ssize_t |
374 | thermal_cooling_device_cur_state_store(struct device *dev, |
375 | struct device_attribute *attr, |
376 | const char *buf, size_t count) |
377 | { |
378 | struct thermal_cooling_device *cdev = to_cooling_device(dev); |
379 | unsigned long state; |
380 | int result; |
381 | |
382 | if (!sscanf(buf, "%ld\n", &state)) |
383 | return -EINVAL; |
384 | |
385 | if ((long)state < 0) |
386 | return -EINVAL; |
387 | |
388 | result = cdev->ops->set_cur_state(cdev, state); |
389 | if (result) |
390 | return result; |
391 | return count; |
392 | } |
393 | |
394 | static struct device_attribute dev_attr_cdev_type = |
395 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
396 | static DEVICE_ATTR(max_state, 0444, |
397 | thermal_cooling_device_max_state_show, NULL); |
398 | static DEVICE_ATTR(cur_state, 0644, |
399 | thermal_cooling_device_cur_state_show, |
400 | thermal_cooling_device_cur_state_store); |
401 | |
402 | static ssize_t |
403 | thermal_cooling_device_trip_point_show(struct device *dev, |
404 | struct device_attribute *attr, char *buf) |
405 | { |
406 | struct thermal_cooling_device_instance *instance; |
407 | |
408 | instance = |
409 | container_of(attr, struct thermal_cooling_device_instance, attr); |
410 | |
411 | if (instance->trip == THERMAL_TRIPS_NONE) |
412 | return sprintf(buf, "-1\n"); |
413 | else |
414 | return sprintf(buf, "%d\n", instance->trip); |
415 | } |
416 | |
417 | /* Device management */ |
418 | |
419 | #if defined(CONFIG_THERMAL_HWMON) |
420 | |
421 | /* hwmon sys I/F */ |
422 | #include <linux/hwmon.h> |
423 | static LIST_HEAD(thermal_hwmon_list); |
424 | |
425 | static ssize_t |
426 | name_show(struct device *dev, struct device_attribute *attr, char *buf) |
427 | { |
428 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
429 | return sprintf(buf, "%s\n", hwmon->type); |
430 | } |
431 | static DEVICE_ATTR(name, 0444, name_show, NULL); |
432 | |
433 | static ssize_t |
434 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) |
435 | { |
436 | long temperature; |
437 | int ret; |
438 | struct thermal_hwmon_attr *hwmon_attr |
439 | = container_of(attr, struct thermal_hwmon_attr, attr); |
440 | struct thermal_zone_device *tz |
441 | = container_of(hwmon_attr, struct thermal_zone_device, |
442 | temp_input); |
443 | |
444 | ret = tz->ops->get_temp(tz, &temperature); |
445 | |
446 | if (ret) |
447 | return ret; |
448 | |
449 | return sprintf(buf, "%ld\n", temperature); |
450 | } |
451 | |
452 | static ssize_t |
453 | temp_crit_show(struct device *dev, struct device_attribute *attr, |
454 | char *buf) |
455 | { |
456 | struct thermal_hwmon_attr *hwmon_attr |
457 | = container_of(attr, struct thermal_hwmon_attr, attr); |
458 | struct thermal_zone_device *tz |
459 | = container_of(hwmon_attr, struct thermal_zone_device, |
460 | temp_crit); |
461 | long temperature; |
462 | int ret; |
463 | |
464 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); |
465 | if (ret) |
466 | return ret; |
467 | |
468 | return sprintf(buf, "%ld\n", temperature); |
469 | } |
470 | |
471 | |
472 | static int |
473 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) |
474 | { |
475 | struct thermal_hwmon_device *hwmon; |
476 | int new_hwmon_device = 1; |
477 | int result; |
478 | |
479 | mutex_lock(&thermal_list_lock); |
480 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) |
481 | if (!strcmp(hwmon->type, tz->type)) { |
482 | new_hwmon_device = 0; |
483 | mutex_unlock(&thermal_list_lock); |
484 | goto register_sys_interface; |
485 | } |
486 | mutex_unlock(&thermal_list_lock); |
487 | |
488 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
489 | if (!hwmon) |
490 | return -ENOMEM; |
491 | |
492 | INIT_LIST_HEAD(&hwmon->tz_list); |
493 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); |
494 | hwmon->device = hwmon_device_register(NULL); |
495 | if (IS_ERR(hwmon->device)) { |
496 | result = PTR_ERR(hwmon->device); |
497 | goto free_mem; |
498 | } |
499 | dev_set_drvdata(hwmon->device, hwmon); |
500 | result = device_create_file(hwmon->device, &dev_attr_name); |
501 | if (result) |
502 | goto unregister_hwmon_device; |
503 | |
504 | register_sys_interface: |
505 | tz->hwmon = hwmon; |
506 | hwmon->count++; |
507 | |
508 | snprintf(tz->temp_input.name, THERMAL_NAME_LENGTH, |
509 | "temp%d_input", hwmon->count); |
510 | tz->temp_input.attr.attr.name = tz->temp_input.name; |
511 | tz->temp_input.attr.attr.mode = 0444; |
512 | tz->temp_input.attr.show = temp_input_show; |
513 | sysfs_attr_init(&tz->temp_input.attr.attr); |
514 | result = device_create_file(hwmon->device, &tz->temp_input.attr); |
515 | if (result) |
516 | goto unregister_hwmon_device; |
517 | |
518 | if (tz->ops->get_crit_temp) { |
519 | unsigned long temperature; |
520 | if (!tz->ops->get_crit_temp(tz, &temperature)) { |
521 | snprintf(tz->temp_crit.name, THERMAL_NAME_LENGTH, |
522 | "temp%d_crit", hwmon->count); |
523 | tz->temp_crit.attr.attr.name = tz->temp_crit.name; |
524 | tz->temp_crit.attr.attr.mode = 0444; |
525 | tz->temp_crit.attr.show = temp_crit_show; |
526 | sysfs_attr_init(&tz->temp_crit.attr.attr); |
527 | result = device_create_file(hwmon->device, |
528 | &tz->temp_crit.attr); |
529 | if (result) |
530 | goto unregister_hwmon_device; |
531 | } |
532 | } |
533 | |
534 | mutex_lock(&thermal_list_lock); |
535 | if (new_hwmon_device) |
536 | list_add_tail(&hwmon->node, &thermal_hwmon_list); |
537 | list_add_tail(&tz->hwmon_node, &hwmon->tz_list); |
538 | mutex_unlock(&thermal_list_lock); |
539 | |
540 | return 0; |
541 | |
542 | unregister_hwmon_device: |
543 | device_remove_file(hwmon->device, &tz->temp_crit.attr); |
544 | device_remove_file(hwmon->device, &tz->temp_input.attr); |
545 | if (new_hwmon_device) { |
546 | device_remove_file(hwmon->device, &dev_attr_name); |
547 | hwmon_device_unregister(hwmon->device); |
548 | } |
549 | free_mem: |
550 | if (new_hwmon_device) |
551 | kfree(hwmon); |
552 | |
553 | return result; |
554 | } |
555 | |
556 | static void |
557 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) |
558 | { |
559 | struct thermal_hwmon_device *hwmon = tz->hwmon; |
560 | |
561 | tz->hwmon = NULL; |
562 | device_remove_file(hwmon->device, &tz->temp_input.attr); |
563 | device_remove_file(hwmon->device, &tz->temp_crit.attr); |
564 | |
565 | mutex_lock(&thermal_list_lock); |
566 | list_del(&tz->hwmon_node); |
567 | if (!list_empty(&hwmon->tz_list)) { |
568 | mutex_unlock(&thermal_list_lock); |
569 | return; |
570 | } |
571 | list_del(&hwmon->node); |
572 | mutex_unlock(&thermal_list_lock); |
573 | |
574 | device_remove_file(hwmon->device, &dev_attr_name); |
575 | hwmon_device_unregister(hwmon->device); |
576 | kfree(hwmon); |
577 | } |
578 | #else |
579 | static int |
580 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) |
581 | { |
582 | return 0; |
583 | } |
584 | |
585 | static void |
586 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) |
587 | { |
588 | } |
589 | #endif |
590 | |
591 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
592 | int delay) |
593 | { |
594 | cancel_delayed_work(&(tz->poll_queue)); |
595 | |
596 | if (!delay) |
597 | return; |
598 | |
599 | if (delay > 1000) |
600 | schedule_delayed_work(&(tz->poll_queue), |
601 | round_jiffies(msecs_to_jiffies(delay))); |
602 | else |
603 | schedule_delayed_work(&(tz->poll_queue), |
604 | msecs_to_jiffies(delay)); |
605 | } |
606 | |
607 | static void thermal_zone_device_passive(struct thermal_zone_device *tz, |
608 | int temp, int trip_temp, int trip) |
609 | { |
610 | int trend = 0; |
611 | struct thermal_cooling_device_instance *instance; |
612 | struct thermal_cooling_device *cdev; |
613 | long state, max_state; |
614 | |
615 | /* |
616 | * Above Trip? |
617 | * ----------- |
618 | * Calculate the thermal trend (using the passive cooling equation) |
619 | * and modify the performance limit for all passive cooling devices |
620 | * accordingly. Note that we assume symmetry. |
621 | */ |
622 | if (temp >= trip_temp) { |
623 | tz->passive = true; |
624 | |
625 | trend = (tz->tc1 * (temp - tz->last_temperature)) + |
626 | (tz->tc2 * (temp - trip_temp)); |
627 | |
628 | /* Heating up? */ |
629 | if (trend > 0) { |
630 | list_for_each_entry(instance, &tz->cooling_devices, |
631 | node) { |
632 | if (instance->trip != trip) |
633 | continue; |
634 | cdev = instance->cdev; |
635 | cdev->ops->get_cur_state(cdev, &state); |
636 | cdev->ops->get_max_state(cdev, &max_state); |
637 | if (state++ < max_state) |
638 | cdev->ops->set_cur_state(cdev, state); |
639 | } |
640 | } else if (trend < 0) { /* Cooling off? */ |
641 | list_for_each_entry(instance, &tz->cooling_devices, |
642 | node) { |
643 | if (instance->trip != trip) |
644 | continue; |
645 | cdev = instance->cdev; |
646 | cdev->ops->get_cur_state(cdev, &state); |
647 | cdev->ops->get_max_state(cdev, &max_state); |
648 | if (state > 0) |
649 | cdev->ops->set_cur_state(cdev, --state); |
650 | } |
651 | } |
652 | return; |
653 | } |
654 | |
655 | /* |
656 | * Below Trip? |
657 | * ----------- |
658 | * Implement passive cooling hysteresis to slowly increase performance |
659 | * and avoid thrashing around the passive trip point. Note that we |
660 | * assume symmetry. |
661 | */ |
662 | list_for_each_entry(instance, &tz->cooling_devices, node) { |
663 | if (instance->trip != trip) |
664 | continue; |
665 | cdev = instance->cdev; |
666 | cdev->ops->get_cur_state(cdev, &state); |
667 | cdev->ops->get_max_state(cdev, &max_state); |
668 | if (state > 0) |
669 | cdev->ops->set_cur_state(cdev, --state); |
670 | if (state == 0) |
671 | tz->passive = false; |
672 | } |
673 | } |
674 | |
675 | static void thermal_zone_device_check(struct work_struct *work) |
676 | { |
677 | struct thermal_zone_device *tz = container_of(work, struct |
678 | thermal_zone_device, |
679 | poll_queue.work); |
680 | thermal_zone_device_update(tz); |
681 | } |
682 | |
683 | /** |
684 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone |
685 | * @tz: thermal zone device |
686 | * @trip: indicates which trip point the cooling devices is |
687 | * associated with in this thermal zone. |
688 | * @cdev: thermal cooling device |
689 | * |
690 | * This function is usually called in the thermal zone device .bind callback. |
691 | */ |
692 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, |
693 | int trip, |
694 | struct thermal_cooling_device *cdev) |
695 | { |
696 | struct thermal_cooling_device_instance *dev; |
697 | struct thermal_cooling_device_instance *pos; |
698 | struct thermal_zone_device *pos1; |
699 | struct thermal_cooling_device *pos2; |
700 | int result; |
701 | |
702 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
703 | return -EINVAL; |
704 | |
705 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
706 | if (pos1 == tz) |
707 | break; |
708 | } |
709 | list_for_each_entry(pos2, &thermal_cdev_list, node) { |
710 | if (pos2 == cdev) |
711 | break; |
712 | } |
713 | |
714 | if (tz != pos1 || cdev != pos2) |
715 | return -EINVAL; |
716 | |
717 | dev = |
718 | kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); |
719 | if (!dev) |
720 | return -ENOMEM; |
721 | dev->tz = tz; |
722 | dev->cdev = cdev; |
723 | dev->trip = trip; |
724 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
725 | if (result) |
726 | goto free_mem; |
727 | |
728 | sprintf(dev->name, "cdev%d", dev->id); |
729 | result = |
730 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); |
731 | if (result) |
732 | goto release_idr; |
733 | |
734 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); |
735 | sysfs_attr_init(&dev->attr.attr); |
736 | dev->attr.attr.name = dev->attr_name; |
737 | dev->attr.attr.mode = 0444; |
738 | dev->attr.show = thermal_cooling_device_trip_point_show; |
739 | result = device_create_file(&tz->device, &dev->attr); |
740 | if (result) |
741 | goto remove_symbol_link; |
742 | |
743 | mutex_lock(&tz->lock); |
744 | list_for_each_entry(pos, &tz->cooling_devices, node) |
745 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
746 | result = -EEXIST; |
747 | break; |
748 | } |
749 | if (!result) |
750 | list_add_tail(&dev->node, &tz->cooling_devices); |
751 | mutex_unlock(&tz->lock); |
752 | |
753 | if (!result) |
754 | return 0; |
755 | |
756 | device_remove_file(&tz->device, &dev->attr); |
757 | remove_symbol_link: |
758 | sysfs_remove_link(&tz->device.kobj, dev->name); |
759 | release_idr: |
760 | release_idr(&tz->idr, &tz->lock, dev->id); |
761 | free_mem: |
762 | kfree(dev); |
763 | return result; |
764 | } |
765 | |
766 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); |
767 | |
768 | /** |
769 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone |
770 | * @tz: thermal zone device |
771 | * @trip: indicates which trip point the cooling devices is |
772 | * associated with in this thermal zone. |
773 | * @cdev: thermal cooling device |
774 | * |
775 | * This function is usually called in the thermal zone device .unbind callback. |
776 | */ |
777 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, |
778 | int trip, |
779 | struct thermal_cooling_device *cdev) |
780 | { |
781 | struct thermal_cooling_device_instance *pos, *next; |
782 | |
783 | mutex_lock(&tz->lock); |
784 | list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) { |
785 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
786 | list_del(&pos->node); |
787 | mutex_unlock(&tz->lock); |
788 | goto unbind; |
789 | } |
790 | } |
791 | mutex_unlock(&tz->lock); |
792 | |
793 | return -ENODEV; |
794 | |
795 | unbind: |
796 | device_remove_file(&tz->device, &pos->attr); |
797 | sysfs_remove_link(&tz->device.kobj, pos->name); |
798 | release_idr(&tz->idr, &tz->lock, pos->id); |
799 | kfree(pos); |
800 | return 0; |
801 | } |
802 | |
803 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); |
804 | |
805 | static void thermal_release(struct device *dev) |
806 | { |
807 | struct thermal_zone_device *tz; |
808 | struct thermal_cooling_device *cdev; |
809 | |
810 | if (!strncmp(dev_name(dev), "thermal_zone", sizeof "thermal_zone" - 1)) { |
811 | tz = to_thermal_zone(dev); |
812 | kfree(tz); |
813 | } else { |
814 | cdev = to_cooling_device(dev); |
815 | kfree(cdev); |
816 | } |
817 | } |
818 | |
819 | static struct class thermal_class = { |
820 | .name = "thermal", |
821 | .dev_release = thermal_release, |
822 | }; |
823 | |
824 | /** |
825 | * thermal_cooling_device_register - register a new thermal cooling device |
826 | * @type: the thermal cooling device type. |
827 | * @devdata: device private data. |
828 | * @ops: standard thermal cooling devices callbacks. |
829 | */ |
830 | struct thermal_cooling_device *thermal_cooling_device_register( |
831 | char *type, void *devdata, const struct thermal_cooling_device_ops *ops) |
832 | { |
833 | struct thermal_cooling_device *cdev; |
834 | struct thermal_zone_device *pos; |
835 | int result; |
836 | |
837 | if (strlen(type) >= THERMAL_NAME_LENGTH) |
838 | return ERR_PTR(-EINVAL); |
839 | |
840 | if (!ops || !ops->get_max_state || !ops->get_cur_state || |
841 | !ops->set_cur_state) |
842 | return ERR_PTR(-EINVAL); |
843 | |
844 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); |
845 | if (!cdev) |
846 | return ERR_PTR(-ENOMEM); |
847 | |
848 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); |
849 | if (result) { |
850 | kfree(cdev); |
851 | return ERR_PTR(result); |
852 | } |
853 | |
854 | strcpy(cdev->type, type); |
855 | cdev->ops = ops; |
856 | cdev->device.class = &thermal_class; |
857 | cdev->devdata = devdata; |
858 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
859 | result = device_register(&cdev->device); |
860 | if (result) { |
861 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
862 | kfree(cdev); |
863 | return ERR_PTR(result); |
864 | } |
865 | |
866 | /* sys I/F */ |
867 | if (type) { |
868 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
869 | if (result) |
870 | goto unregister; |
871 | } |
872 | |
873 | result = device_create_file(&cdev->device, &dev_attr_max_state); |
874 | if (result) |
875 | goto unregister; |
876 | |
877 | result = device_create_file(&cdev->device, &dev_attr_cur_state); |
878 | if (result) |
879 | goto unregister; |
880 | |
881 | mutex_lock(&thermal_list_lock); |
882 | list_add(&cdev->node, &thermal_cdev_list); |
883 | list_for_each_entry(pos, &thermal_tz_list, node) { |
884 | if (!pos->ops->bind) |
885 | continue; |
886 | result = pos->ops->bind(pos, cdev); |
887 | if (result) |
888 | break; |
889 | |
890 | } |
891 | mutex_unlock(&thermal_list_lock); |
892 | |
893 | if (!result) |
894 | return cdev; |
895 | |
896 | unregister: |
897 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
898 | device_unregister(&cdev->device); |
899 | return ERR_PTR(result); |
900 | } |
901 | |
902 | EXPORT_SYMBOL(thermal_cooling_device_register); |
903 | |
904 | /** |
905 | * thermal_cooling_device_unregister - removes the registered thermal cooling device |
906 | * @cdev: the thermal cooling device to remove. |
907 | * |
908 | * thermal_cooling_device_unregister() must be called when the device is no |
909 | * longer needed. |
910 | */ |
911 | void thermal_cooling_device_unregister(struct |
912 | thermal_cooling_device |
913 | *cdev) |
914 | { |
915 | struct thermal_zone_device *tz; |
916 | struct thermal_cooling_device *pos = NULL; |
917 | |
918 | if (!cdev) |
919 | return; |
920 | |
921 | mutex_lock(&thermal_list_lock); |
922 | list_for_each_entry(pos, &thermal_cdev_list, node) |
923 | if (pos == cdev) |
924 | break; |
925 | if (pos != cdev) { |
926 | /* thermal cooling device not found */ |
927 | mutex_unlock(&thermal_list_lock); |
928 | return; |
929 | } |
930 | list_del(&cdev->node); |
931 | list_for_each_entry(tz, &thermal_tz_list, node) { |
932 | if (!tz->ops->unbind) |
933 | continue; |
934 | tz->ops->unbind(tz, cdev); |
935 | } |
936 | mutex_unlock(&thermal_list_lock); |
937 | if (cdev->type[0]) |
938 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
939 | device_remove_file(&cdev->device, &dev_attr_max_state); |
940 | device_remove_file(&cdev->device, &dev_attr_cur_state); |
941 | |
942 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
943 | device_unregister(&cdev->device); |
944 | return; |
945 | } |
946 | |
947 | EXPORT_SYMBOL(thermal_cooling_device_unregister); |
948 | |
949 | /** |
950 | * thermal_zone_device_update - force an update of a thermal zone's state |
951 | * @ttz: the thermal zone to update |
952 | */ |
953 | |
954 | void thermal_zone_device_update(struct thermal_zone_device *tz) |
955 | { |
956 | int count, ret = 0; |
957 | long temp, trip_temp; |
958 | enum thermal_trip_type trip_type; |
959 | struct thermal_cooling_device_instance *instance; |
960 | struct thermal_cooling_device *cdev; |
961 | |
962 | mutex_lock(&tz->lock); |
963 | |
964 | if (tz->ops->get_temp(tz, &temp)) { |
965 | /* get_temp failed - retry it later */ |
966 | printk(KERN_WARNING PREFIX "failed to read out thermal zone " |
967 | "%d\n", tz->id); |
968 | goto leave; |
969 | } |
970 | |
971 | for (count = 0; count < tz->trips; count++) { |
972 | tz->ops->get_trip_type(tz, count, &trip_type); |
973 | tz->ops->get_trip_temp(tz, count, &trip_temp); |
974 | |
975 | switch (trip_type) { |
976 | case THERMAL_TRIP_CRITICAL: |
977 | if (temp >= trip_temp) { |
978 | if (tz->ops->notify) |
979 | ret = tz->ops->notify(tz, count, |
980 | trip_type); |
981 | if (!ret) { |
982 | printk(KERN_EMERG |
983 | "Critical temperature reached (%ld C), shutting down.\n", |
984 | temp/1000); |
985 | orderly_poweroff(true); |
986 | } |
987 | } |
988 | break; |
989 | case THERMAL_TRIP_HOT: |
990 | if (temp >= trip_temp) |
991 | if (tz->ops->notify) |
992 | tz->ops->notify(tz, count, trip_type); |
993 | break; |
994 | case THERMAL_TRIP_ACTIVE: |
995 | list_for_each_entry(instance, &tz->cooling_devices, |
996 | node) { |
997 | if (instance->trip != count) |
998 | continue; |
999 | |
1000 | cdev = instance->cdev; |
1001 | |
1002 | if (temp >= trip_temp) |
1003 | cdev->ops->set_cur_state(cdev, 1); |
1004 | else |
1005 | cdev->ops->set_cur_state(cdev, 0); |
1006 | } |
1007 | break; |
1008 | case THERMAL_TRIP_PASSIVE: |
1009 | if (temp >= trip_temp || tz->passive) |
1010 | thermal_zone_device_passive(tz, temp, |
1011 | trip_temp, count); |
1012 | break; |
1013 | } |
1014 | } |
1015 | |
1016 | if (tz->forced_passive) |
1017 | thermal_zone_device_passive(tz, temp, tz->forced_passive, |
1018 | THERMAL_TRIPS_NONE); |
1019 | |
1020 | tz->last_temperature = temp; |
1021 | |
1022 | leave: |
1023 | if (tz->passive) |
1024 | thermal_zone_device_set_polling(tz, tz->passive_delay); |
1025 | else if (tz->polling_delay) |
1026 | thermal_zone_device_set_polling(tz, tz->polling_delay); |
1027 | else |
1028 | thermal_zone_device_set_polling(tz, 0); |
1029 | mutex_unlock(&tz->lock); |
1030 | } |
1031 | EXPORT_SYMBOL(thermal_zone_device_update); |
1032 | |
1033 | /** |
1034 | * thermal_zone_device_register - register a new thermal zone device |
1035 | * @type: the thermal zone device type |
1036 | * @trips: the number of trip points the thermal zone support |
1037 | * @devdata: private device data |
1038 | * @ops: standard thermal zone device callbacks |
1039 | * @tc1: thermal coefficient 1 for passive calculations |
1040 | * @tc2: thermal coefficient 2 for passive calculations |
1041 | * @passive_delay: number of milliseconds to wait between polls when |
1042 | * performing passive cooling |
1043 | * @polling_delay: number of milliseconds to wait between polls when checking |
1044 | * whether trip points have been crossed (0 for interrupt |
1045 | * driven systems) |
1046 | * |
1047 | * thermal_zone_device_unregister() must be called when the device is no |
1048 | * longer needed. The passive cooling formula uses tc1 and tc2 as described in |
1049 | * section 11.1.5.1 of the ACPI specification 3.0. |
1050 | */ |
1051 | struct thermal_zone_device *thermal_zone_device_register(char *type, |
1052 | int trips, void *devdata, |
1053 | const struct thermal_zone_device_ops *ops, |
1054 | int tc1, int tc2, int passive_delay, int polling_delay) |
1055 | { |
1056 | struct thermal_zone_device *tz; |
1057 | struct thermal_cooling_device *pos; |
1058 | enum thermal_trip_type trip_type; |
1059 | int result; |
1060 | int count; |
1061 | int passive = 0; |
1062 | |
1063 | if (strlen(type) >= THERMAL_NAME_LENGTH) |
1064 | return ERR_PTR(-EINVAL); |
1065 | |
1066 | if (trips > THERMAL_MAX_TRIPS || trips < 0) |
1067 | return ERR_PTR(-EINVAL); |
1068 | |
1069 | if (!ops || !ops->get_temp) |
1070 | return ERR_PTR(-EINVAL); |
1071 | |
1072 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1073 | if (!tz) |
1074 | return ERR_PTR(-ENOMEM); |
1075 | |
1076 | INIT_LIST_HEAD(&tz->cooling_devices); |
1077 | idr_init(&tz->idr); |
1078 | mutex_init(&tz->lock); |
1079 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); |
1080 | if (result) { |
1081 | kfree(tz); |
1082 | return ERR_PTR(result); |
1083 | } |
1084 | |
1085 | strcpy(tz->type, type); |
1086 | tz->ops = ops; |
1087 | tz->device.class = &thermal_class; |
1088 | tz->devdata = devdata; |
1089 | tz->trips = trips; |
1090 | tz->tc1 = tc1; |
1091 | tz->tc2 = tc2; |
1092 | tz->passive_delay = passive_delay; |
1093 | tz->polling_delay = polling_delay; |
1094 | |
1095 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
1096 | result = device_register(&tz->device); |
1097 | if (result) { |
1098 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1099 | kfree(tz); |
1100 | return ERR_PTR(result); |
1101 | } |
1102 | |
1103 | /* sys I/F */ |
1104 | if (type) { |
1105 | result = device_create_file(&tz->device, &dev_attr_type); |
1106 | if (result) |
1107 | goto unregister; |
1108 | } |
1109 | |
1110 | result = device_create_file(&tz->device, &dev_attr_temp); |
1111 | if (result) |
1112 | goto unregister; |
1113 | |
1114 | if (ops->get_mode) { |
1115 | result = device_create_file(&tz->device, &dev_attr_mode); |
1116 | if (result) |
1117 | goto unregister; |
1118 | } |
1119 | |
1120 | for (count = 0; count < trips; count++) { |
1121 | TRIP_POINT_ATTR_ADD(&tz->device, count, result); |
1122 | if (result) |
1123 | goto unregister; |
1124 | tz->ops->get_trip_type(tz, count, &trip_type); |
1125 | if (trip_type == THERMAL_TRIP_PASSIVE) |
1126 | passive = 1; |
1127 | } |
1128 | |
1129 | if (!passive) |
1130 | result = device_create_file(&tz->device, |
1131 | &dev_attr_passive); |
1132 | |
1133 | if (result) |
1134 | goto unregister; |
1135 | |
1136 | result = thermal_add_hwmon_sysfs(tz); |
1137 | if (result) |
1138 | goto unregister; |
1139 | |
1140 | mutex_lock(&thermal_list_lock); |
1141 | list_add_tail(&tz->node, &thermal_tz_list); |
1142 | if (ops->bind) |
1143 | list_for_each_entry(pos, &thermal_cdev_list, node) { |
1144 | result = ops->bind(tz, pos); |
1145 | if (result) |
1146 | break; |
1147 | } |
1148 | mutex_unlock(&thermal_list_lock); |
1149 | |
1150 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1151 | |
1152 | thermal_zone_device_update(tz); |
1153 | |
1154 | if (!result) |
1155 | return tz; |
1156 | |
1157 | unregister: |
1158 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1159 | device_unregister(&tz->device); |
1160 | return ERR_PTR(result); |
1161 | } |
1162 | |
1163 | EXPORT_SYMBOL(thermal_zone_device_register); |
1164 | |
1165 | /** |
1166 | * thermal_device_unregister - removes the registered thermal zone device |
1167 | * @tz: the thermal zone device to remove |
1168 | */ |
1169 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) |
1170 | { |
1171 | struct thermal_cooling_device *cdev; |
1172 | struct thermal_zone_device *pos = NULL; |
1173 | int count; |
1174 | |
1175 | if (!tz) |
1176 | return; |
1177 | |
1178 | mutex_lock(&thermal_list_lock); |
1179 | list_for_each_entry(pos, &thermal_tz_list, node) |
1180 | if (pos == tz) |
1181 | break; |
1182 | if (pos != tz) { |
1183 | /* thermal zone device not found */ |
1184 | mutex_unlock(&thermal_list_lock); |
1185 | return; |
1186 | } |
1187 | list_del(&tz->node); |
1188 | if (tz->ops->unbind) |
1189 | list_for_each_entry(cdev, &thermal_cdev_list, node) |
1190 | tz->ops->unbind(tz, cdev); |
1191 | mutex_unlock(&thermal_list_lock); |
1192 | |
1193 | thermal_zone_device_set_polling(tz, 0); |
1194 | |
1195 | if (tz->type[0]) |
1196 | device_remove_file(&tz->device, &dev_attr_type); |
1197 | device_remove_file(&tz->device, &dev_attr_temp); |
1198 | if (tz->ops->get_mode) |
1199 | device_remove_file(&tz->device, &dev_attr_mode); |
1200 | |
1201 | for (count = 0; count < tz->trips; count++) |
1202 | TRIP_POINT_ATTR_REMOVE(&tz->device, count); |
1203 | |
1204 | thermal_remove_hwmon_sysfs(tz); |
1205 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1206 | idr_destroy(&tz->idr); |
1207 | mutex_destroy(&tz->lock); |
1208 | device_unregister(&tz->device); |
1209 | return; |
1210 | } |
1211 | |
1212 | EXPORT_SYMBOL(thermal_zone_device_unregister); |
1213 | |
1214 | #ifdef CONFIG_NET |
1215 | static struct genl_family thermal_event_genl_family = { |
1216 | .id = GENL_ID_GENERATE, |
1217 | .name = THERMAL_GENL_FAMILY_NAME, |
1218 | .version = THERMAL_GENL_VERSION, |
1219 | .maxattr = THERMAL_GENL_ATTR_MAX, |
1220 | }; |
1221 | |
1222 | static struct genl_multicast_group thermal_event_mcgrp = { |
1223 | .name = THERMAL_GENL_MCAST_GROUP_NAME, |
1224 | }; |
1225 | |
1226 | int generate_netlink_event(u32 orig, enum events event) |
1227 | { |
1228 | struct sk_buff *skb; |
1229 | struct nlattr *attr; |
1230 | struct thermal_genl_event *thermal_event; |
1231 | void *msg_header; |
1232 | int size; |
1233 | int result; |
1234 | |
1235 | /* allocate memory */ |
1236 | size = nla_total_size(sizeof(struct thermal_genl_event)) + \ |
1237 | nla_total_size(0); |
1238 | |
1239 | skb = genlmsg_new(size, GFP_ATOMIC); |
1240 | if (!skb) |
1241 | return -ENOMEM; |
1242 | |
1243 | /* add the genetlink message header */ |
1244 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, |
1245 | &thermal_event_genl_family, 0, |
1246 | THERMAL_GENL_CMD_EVENT); |
1247 | if (!msg_header) { |
1248 | nlmsg_free(skb); |
1249 | return -ENOMEM; |
1250 | } |
1251 | |
1252 | /* fill the data */ |
1253 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, \ |
1254 | sizeof(struct thermal_genl_event)); |
1255 | |
1256 | if (!attr) { |
1257 | nlmsg_free(skb); |
1258 | return -EINVAL; |
1259 | } |
1260 | |
1261 | thermal_event = nla_data(attr); |
1262 | if (!thermal_event) { |
1263 | nlmsg_free(skb); |
1264 | return -EINVAL; |
1265 | } |
1266 | |
1267 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); |
1268 | |
1269 | thermal_event->orig = orig; |
1270 | thermal_event->event = event; |
1271 | |
1272 | /* send multicast genetlink message */ |
1273 | result = genlmsg_end(skb, msg_header); |
1274 | if (result < 0) { |
1275 | nlmsg_free(skb); |
1276 | return result; |
1277 | } |
1278 | |
1279 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); |
1280 | if (result) |
1281 | printk(KERN_INFO "failed to send netlink event:%d", result); |
1282 | |
1283 | return result; |
1284 | } |
1285 | EXPORT_SYMBOL(generate_netlink_event); |
1286 | |
1287 | static int genetlink_init(void) |
1288 | { |
1289 | int result; |
1290 | |
1291 | result = genl_register_family(&thermal_event_genl_family); |
1292 | if (result) |
1293 | return result; |
1294 | |
1295 | result = genl_register_mc_group(&thermal_event_genl_family, |
1296 | &thermal_event_mcgrp); |
1297 | if (result) |
1298 | genl_unregister_family(&thermal_event_genl_family); |
1299 | return result; |
1300 | } |
1301 | |
1302 | static void genetlink_exit(void) |
1303 | { |
1304 | genl_unregister_family(&thermal_event_genl_family); |
1305 | } |
1306 | #else /* !CONFIG_NET */ |
1307 | static inline int genetlink_init(void) { return 0; } |
1308 | static inline void genetlink_exit(void) {} |
1309 | #endif /* !CONFIG_NET */ |
1310 | |
1311 | static int __init thermal_init(void) |
1312 | { |
1313 | int result = 0; |
1314 | |
1315 | result = class_register(&thermal_class); |
1316 | if (result) { |
1317 | idr_destroy(&thermal_tz_idr); |
1318 | idr_destroy(&thermal_cdev_idr); |
1319 | mutex_destroy(&thermal_idr_lock); |
1320 | mutex_destroy(&thermal_list_lock); |
1321 | } |
1322 | result = genetlink_init(); |
1323 | return result; |
1324 | } |
1325 | |
1326 | static void __exit thermal_exit(void) |
1327 | { |
1328 | class_unregister(&thermal_class); |
1329 | idr_destroy(&thermal_tz_idr); |
1330 | idr_destroy(&thermal_cdev_idr); |
1331 | mutex_destroy(&thermal_idr_lock); |
1332 | mutex_destroy(&thermal_list_lock); |
1333 | genetlink_exit(); |
1334 | } |
1335 | |
1336 | fs_initcall(thermal_init); |
1337 | module_exit(thermal_exit); |
1338 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9