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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Copyright 2020 Linaro Limited | |
4 | * | |
5 | * Author: Daniel Lezcano <daniel.lezcano@linaro.org> | |
6 | * | |
7 | * Generic netlink for thermal management framework | |
8 | */ | |
9 | #include <linux/module.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <net/genetlink.h> | |
12 | #include <uapi/linux/thermal.h> | |
13 | ||
14 | #include "thermal_core.h" | |
15 | ||
16 | static const struct genl_multicast_group thermal_genl_mcgrps[] = { | |
17 | { .name = THERMAL_GENL_SAMPLING_GROUP_NAME, }, | |
18 | { .name = THERMAL_GENL_EVENT_GROUP_NAME, }, | |
19 | }; | |
20 | ||
21 | static const struct nla_policy thermal_genl_policy[THERMAL_GENL_ATTR_MAX + 1] = { | |
22 | /* Thermal zone */ | |
23 | [THERMAL_GENL_ATTR_TZ] = { .type = NLA_NESTED }, | |
24 | [THERMAL_GENL_ATTR_TZ_ID] = { .type = NLA_U32 }, | |
25 | [THERMAL_GENL_ATTR_TZ_TEMP] = { .type = NLA_U32 }, | |
26 | [THERMAL_GENL_ATTR_TZ_TRIP] = { .type = NLA_NESTED }, | |
27 | [THERMAL_GENL_ATTR_TZ_TRIP_ID] = { .type = NLA_U32 }, | |
28 | [THERMAL_GENL_ATTR_TZ_TRIP_TEMP] = { .type = NLA_U32 }, | |
29 | [THERMAL_GENL_ATTR_TZ_TRIP_TYPE] = { .type = NLA_U32 }, | |
30 | [THERMAL_GENL_ATTR_TZ_TRIP_HYST] = { .type = NLA_U32 }, | |
31 | [THERMAL_GENL_ATTR_TZ_MODE] = { .type = NLA_U32 }, | |
32 | [THERMAL_GENL_ATTR_TZ_CDEV_WEIGHT] = { .type = NLA_U32 }, | |
33 | [THERMAL_GENL_ATTR_TZ_NAME] = { .type = NLA_STRING, | |
34 | .len = THERMAL_NAME_LENGTH }, | |
35 | /* Governor(s) */ | |
36 | [THERMAL_GENL_ATTR_TZ_GOV] = { .type = NLA_NESTED }, | |
37 | [THERMAL_GENL_ATTR_TZ_GOV_NAME] = { .type = NLA_STRING, | |
38 | .len = THERMAL_NAME_LENGTH }, | |
39 | /* Cooling devices */ | |
40 | [THERMAL_GENL_ATTR_CDEV] = { .type = NLA_NESTED }, | |
41 | [THERMAL_GENL_ATTR_CDEV_ID] = { .type = NLA_U32 }, | |
42 | [THERMAL_GENL_ATTR_CDEV_CUR_STATE] = { .type = NLA_U32 }, | |
43 | [THERMAL_GENL_ATTR_CDEV_MAX_STATE] = { .type = NLA_U32 }, | |
44 | [THERMAL_GENL_ATTR_CDEV_NAME] = { .type = NLA_STRING, | |
45 | .len = THERMAL_NAME_LENGTH }, | |
46 | }; | |
47 | ||
48 | struct param { | |
49 | struct nlattr **attrs; | |
50 | struct sk_buff *msg; | |
51 | const char *name; | |
52 | int tz_id; | |
53 | int cdev_id; | |
54 | int trip_id; | |
55 | int trip_temp; | |
56 | int trip_type; | |
57 | int trip_hyst; | |
58 | int temp; | |
59 | int cdev_state; | |
60 | int cdev_max_state; | |
61 | }; | |
62 | ||
63 | typedef int (*cb_t)(struct param *); | |
64 | ||
65 | static struct genl_family thermal_gnl_family; | |
66 | ||
67 | /************************** Sampling encoding *******************************/ | |
68 | ||
69 | int thermal_genl_sampling_temp(int id, int temp) | |
70 | { | |
71 | struct sk_buff *skb; | |
72 | void *hdr; | |
73 | ||
74 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
75 | if (!skb) | |
76 | return -ENOMEM; | |
77 | ||
78 | hdr = genlmsg_put(skb, 0, 0, &thermal_gnl_family, 0, | |
79 | THERMAL_GENL_SAMPLING_TEMP); | |
80 | if (!hdr) | |
48b45859 | 81 | goto out_free; |
1ce50e7d DL |
82 | |
83 | if (nla_put_u32(skb, THERMAL_GENL_ATTR_TZ_ID, id)) | |
84 | goto out_cancel; | |
85 | ||
86 | if (nla_put_u32(skb, THERMAL_GENL_ATTR_TZ_TEMP, temp)) | |
87 | goto out_cancel; | |
88 | ||
89 | genlmsg_end(skb, hdr); | |
90 | ||
91 | genlmsg_multicast(&thermal_gnl_family, skb, 0, 0, GFP_KERNEL); | |
92 | ||
93 | return 0; | |
94 | out_cancel: | |
95 | genlmsg_cancel(skb, hdr); | |
48b45859 | 96 | out_free: |
1ce50e7d DL |
97 | nlmsg_free(skb); |
98 | ||
99 | return -EMSGSIZE; | |
100 | } | |
101 | ||
102 | /**************************** Event encoding *********************************/ | |
103 | ||
104 | static int thermal_genl_event_tz_create(struct param *p) | |
105 | { | |
106 | if (nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_ID, p->tz_id) || | |
107 | nla_put_string(p->msg, THERMAL_GENL_ATTR_TZ_NAME, p->name)) | |
108 | return -EMSGSIZE; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static int thermal_genl_event_tz(struct param *p) | |
114 | { | |
115 | if (nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_ID, p->tz_id)) | |
116 | return -EMSGSIZE; | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | static int thermal_genl_event_tz_trip_up(struct param *p) | |
122 | { | |
123 | if (nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_ID, p->tz_id) || | |
124 | nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_TRIP_ID, p->trip_id)) | |
125 | return -EMSGSIZE; | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static int thermal_genl_event_tz_trip_add(struct param *p) | |
131 | { | |
132 | if (nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_ID, p->tz_id) || | |
133 | nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_TRIP_ID, p->trip_id) || | |
134 | nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_TRIP_TYPE, p->trip_type) || | |
135 | nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_TRIP_TEMP, p->trip_temp) || | |
136 | nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_TRIP_HYST, p->trip_hyst)) | |
137 | return -EMSGSIZE; | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static int thermal_genl_event_tz_trip_delete(struct param *p) | |
143 | { | |
144 | if (nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_ID, p->tz_id) || | |
145 | nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_TRIP_ID, p->trip_id)) | |
146 | return -EMSGSIZE; | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static int thermal_genl_event_cdev_add(struct param *p) | |
152 | { | |
153 | if (nla_put_string(p->msg, THERMAL_GENL_ATTR_CDEV_NAME, | |
154 | p->name) || | |
155 | nla_put_u32(p->msg, THERMAL_GENL_ATTR_CDEV_ID, | |
156 | p->cdev_id) || | |
157 | nla_put_u32(p->msg, THERMAL_GENL_ATTR_CDEV_MAX_STATE, | |
158 | p->cdev_max_state)) | |
159 | return -EMSGSIZE; | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | static int thermal_genl_event_cdev_delete(struct param *p) | |
165 | { | |
166 | if (nla_put_u32(p->msg, THERMAL_GENL_ATTR_CDEV_ID, p->cdev_id)) | |
167 | return -EMSGSIZE; | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static int thermal_genl_event_cdev_state_update(struct param *p) | |
173 | { | |
174 | if (nla_put_u32(p->msg, THERMAL_GENL_ATTR_CDEV_ID, | |
175 | p->cdev_id) || | |
176 | nla_put_u32(p->msg, THERMAL_GENL_ATTR_CDEV_CUR_STATE, | |
177 | p->cdev_state)) | |
178 | return -EMSGSIZE; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | static int thermal_genl_event_gov_change(struct param *p) | |
184 | { | |
185 | if (nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_ID, p->tz_id) || | |
186 | nla_put_string(p->msg, THERMAL_GENL_ATTR_GOV_NAME, p->name)) | |
187 | return -EMSGSIZE; | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | int thermal_genl_event_tz_delete(struct param *p) | |
193 | __attribute__((alias("thermal_genl_event_tz"))); | |
194 | ||
195 | int thermal_genl_event_tz_enable(struct param *p) | |
196 | __attribute__((alias("thermal_genl_event_tz"))); | |
197 | ||
198 | int thermal_genl_event_tz_disable(struct param *p) | |
199 | __attribute__((alias("thermal_genl_event_tz"))); | |
200 | ||
201 | int thermal_genl_event_tz_trip_down(struct param *p) | |
202 | __attribute__((alias("thermal_genl_event_tz_trip_up"))); | |
203 | ||
204 | int thermal_genl_event_tz_trip_change(struct param *p) | |
205 | __attribute__((alias("thermal_genl_event_tz_trip_add"))); | |
206 | ||
207 | static cb_t event_cb[] = { | |
208 | [THERMAL_GENL_EVENT_TZ_CREATE] = thermal_genl_event_tz_create, | |
209 | [THERMAL_GENL_EVENT_TZ_DELETE] = thermal_genl_event_tz_delete, | |
210 | [THERMAL_GENL_EVENT_TZ_ENABLE] = thermal_genl_event_tz_enable, | |
211 | [THERMAL_GENL_EVENT_TZ_DISABLE] = thermal_genl_event_tz_disable, | |
212 | [THERMAL_GENL_EVENT_TZ_TRIP_UP] = thermal_genl_event_tz_trip_up, | |
213 | [THERMAL_GENL_EVENT_TZ_TRIP_DOWN] = thermal_genl_event_tz_trip_down, | |
214 | [THERMAL_GENL_EVENT_TZ_TRIP_CHANGE] = thermal_genl_event_tz_trip_change, | |
215 | [THERMAL_GENL_EVENT_TZ_TRIP_ADD] = thermal_genl_event_tz_trip_add, | |
216 | [THERMAL_GENL_EVENT_TZ_TRIP_DELETE] = thermal_genl_event_tz_trip_delete, | |
217 | [THERMAL_GENL_EVENT_CDEV_ADD] = thermal_genl_event_cdev_add, | |
218 | [THERMAL_GENL_EVENT_CDEV_DELETE] = thermal_genl_event_cdev_delete, | |
219 | [THERMAL_GENL_EVENT_CDEV_STATE_UPDATE] = thermal_genl_event_cdev_state_update, | |
220 | [THERMAL_GENL_EVENT_TZ_GOV_CHANGE] = thermal_genl_event_gov_change, | |
221 | }; | |
222 | ||
223 | /* | |
224 | * Generic netlink event encoding | |
225 | */ | |
226 | static int thermal_genl_send_event(enum thermal_genl_event event, | |
227 | struct param *p) | |
228 | { | |
229 | struct sk_buff *msg; | |
230 | int ret = -EMSGSIZE; | |
231 | void *hdr; | |
232 | ||
233 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
234 | if (!msg) | |
235 | return -ENOMEM; | |
236 | p->msg = msg; | |
237 | ||
238 | hdr = genlmsg_put(msg, 0, 0, &thermal_gnl_family, 0, event); | |
239 | if (!hdr) | |
240 | goto out_free_msg; | |
241 | ||
242 | ret = event_cb[event](p); | |
243 | if (ret) | |
244 | goto out_cancel_msg; | |
245 | ||
246 | genlmsg_end(msg, hdr); | |
247 | ||
248 | genlmsg_multicast(&thermal_gnl_family, msg, 0, 1, GFP_KERNEL); | |
249 | ||
250 | return 0; | |
251 | ||
252 | out_cancel_msg: | |
253 | genlmsg_cancel(msg, hdr); | |
254 | out_free_msg: | |
255 | nlmsg_free(msg); | |
256 | ||
257 | return ret; | |
258 | } | |
259 | ||
260 | int thermal_notify_tz_create(int tz_id, const char *name) | |
261 | { | |
262 | struct param p = { .tz_id = tz_id, .name = name }; | |
263 | ||
264 | return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_CREATE, &p); | |
265 | } | |
266 | ||
267 | int thermal_notify_tz_delete(int tz_id) | |
268 | { | |
269 | struct param p = { .tz_id = tz_id }; | |
270 | ||
271 | return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_DELETE, &p); | |
272 | } | |
273 | ||
274 | int thermal_notify_tz_enable(int tz_id) | |
275 | { | |
276 | struct param p = { .tz_id = tz_id }; | |
277 | ||
278 | return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_ENABLE, &p); | |
279 | } | |
280 | ||
281 | int thermal_notify_tz_disable(int tz_id) | |
282 | { | |
283 | struct param p = { .tz_id = tz_id }; | |
284 | ||
285 | return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_DISABLE, &p); | |
286 | } | |
287 | ||
288 | int thermal_notify_tz_trip_down(int tz_id, int trip_id) | |
289 | { | |
290 | struct param p = { .tz_id = tz_id, .trip_id = trip_id }; | |
291 | ||
292 | return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_TRIP_DOWN, &p); | |
293 | } | |
294 | ||
295 | int thermal_notify_tz_trip_up(int tz_id, int trip_id) | |
296 | { | |
297 | struct param p = { .tz_id = tz_id, .trip_id = trip_id }; | |
298 | ||
299 | return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_TRIP_UP, &p); | |
300 | } | |
301 | ||
302 | int thermal_notify_tz_trip_add(int tz_id, int trip_id, int trip_type, | |
303 | int trip_temp, int trip_hyst) | |
304 | { | |
305 | struct param p = { .tz_id = tz_id, .trip_id = trip_id, | |
306 | .trip_type = trip_type, .trip_temp = trip_temp, | |
307 | .trip_hyst = trip_hyst }; | |
308 | ||
309 | return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_TRIP_ADD, &p); | |
310 | } | |
311 | ||
312 | int thermal_notify_tz_trip_delete(int tz_id, int trip_id) | |
313 | { | |
314 | struct param p = { .tz_id = tz_id, .trip_id = trip_id }; | |
315 | ||
316 | return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_TRIP_DELETE, &p); | |
317 | } | |
318 | ||
319 | int thermal_notify_tz_trip_change(int tz_id, int trip_id, int trip_type, | |
320 | int trip_temp, int trip_hyst) | |
321 | { | |
322 | struct param p = { .tz_id = tz_id, .trip_id = trip_id, | |
323 | .trip_type = trip_type, .trip_temp = trip_temp, | |
324 | .trip_hyst = trip_hyst }; | |
325 | ||
326 | return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_TRIP_CHANGE, &p); | |
327 | } | |
328 | ||
329 | int thermal_notify_cdev_state_update(int cdev_id, int cdev_state) | |
330 | { | |
331 | struct param p = { .cdev_id = cdev_id, .cdev_state = cdev_state }; | |
332 | ||
333 | return thermal_genl_send_event(THERMAL_GENL_EVENT_CDEV_STATE_UPDATE, &p); | |
334 | } | |
335 | ||
336 | int thermal_notify_cdev_add(int cdev_id, const char *name, int cdev_max_state) | |
337 | { | |
338 | struct param p = { .cdev_id = cdev_id, .name = name, | |
339 | .cdev_max_state = cdev_max_state }; | |
340 | ||
341 | return thermal_genl_send_event(THERMAL_GENL_EVENT_CDEV_ADD, &p); | |
342 | } | |
343 | ||
344 | int thermal_notify_cdev_delete(int cdev_id) | |
345 | { | |
346 | struct param p = { .cdev_id = cdev_id }; | |
347 | ||
348 | return thermal_genl_send_event(THERMAL_GENL_EVENT_CDEV_DELETE, &p); | |
349 | } | |
350 | ||
351 | int thermal_notify_tz_gov_change(int tz_id, const char *name) | |
352 | { | |
353 | struct param p = { .tz_id = tz_id, .name = name }; | |
354 | ||
355 | return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_GOV_CHANGE, &p); | |
356 | } | |
357 | ||
358 | /*************************** Command encoding ********************************/ | |
359 | ||
360 | static int __thermal_genl_cmd_tz_get_id(struct thermal_zone_device *tz, | |
361 | void *data) | |
362 | { | |
363 | struct sk_buff *msg = data; | |
364 | ||
365 | if (nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_ID, tz->id) || | |
366 | nla_put_string(msg, THERMAL_GENL_ATTR_TZ_NAME, tz->type)) | |
367 | return -EMSGSIZE; | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | static int thermal_genl_cmd_tz_get_id(struct param *p) | |
373 | { | |
374 | struct sk_buff *msg = p->msg; | |
375 | struct nlattr *start_tz; | |
376 | int ret; | |
377 | ||
378 | start_tz = nla_nest_start(msg, THERMAL_GENL_ATTR_TZ); | |
379 | if (!start_tz) | |
380 | return -EMSGSIZE; | |
381 | ||
382 | ret = for_each_thermal_zone(__thermal_genl_cmd_tz_get_id, msg); | |
383 | if (ret) | |
384 | goto out_cancel_nest; | |
385 | ||
386 | nla_nest_end(msg, start_tz); | |
387 | ||
388 | return 0; | |
389 | ||
390 | out_cancel_nest: | |
391 | nla_nest_cancel(msg, start_tz); | |
392 | ||
393 | return ret; | |
394 | } | |
395 | ||
396 | static int thermal_genl_cmd_tz_get_trip(struct param *p) | |
397 | { | |
398 | struct sk_buff *msg = p->msg; | |
399 | struct thermal_zone_device *tz; | |
400 | struct nlattr *start_trip; | |
401 | int i, id; | |
402 | ||
403 | if (!p->attrs[THERMAL_GENL_ATTR_TZ_ID]) | |
404 | return -EINVAL; | |
405 | ||
406 | id = nla_get_u32(p->attrs[THERMAL_GENL_ATTR_TZ_ID]); | |
407 | ||
408 | tz = thermal_zone_get_by_id(id); | |
409 | if (!tz) | |
410 | return -EINVAL; | |
411 | ||
412 | start_trip = nla_nest_start(msg, THERMAL_GENL_ATTR_TZ_TRIP); | |
413 | if (!start_trip) | |
414 | return -EMSGSIZE; | |
415 | ||
416 | mutex_lock(&tz->lock); | |
417 | ||
418 | for (i = 0; i < tz->trips; i++) { | |
419 | ||
420 | enum thermal_trip_type type; | |
421 | int temp, hyst; | |
422 | ||
423 | tz->ops->get_trip_type(tz, i, &type); | |
424 | tz->ops->get_trip_temp(tz, i, &temp); | |
425 | tz->ops->get_trip_hyst(tz, i, &hyst); | |
426 | ||
427 | if (nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_ID, i) || | |
428 | nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TYPE, type) || | |
429 | nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TEMP, temp) || | |
430 | nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_HYST, hyst)) | |
431 | goto out_cancel_nest; | |
432 | } | |
433 | ||
434 | mutex_unlock(&tz->lock); | |
435 | ||
436 | nla_nest_end(msg, start_trip); | |
437 | ||
438 | return 0; | |
439 | ||
440 | out_cancel_nest: | |
441 | mutex_unlock(&tz->lock); | |
442 | ||
443 | return -EMSGSIZE; | |
444 | } | |
445 | ||
446 | static int thermal_genl_cmd_tz_get_temp(struct param *p) | |
447 | { | |
448 | struct sk_buff *msg = p->msg; | |
449 | struct thermal_zone_device *tz; | |
450 | int temp, ret, id; | |
451 | ||
452 | if (!p->attrs[THERMAL_GENL_ATTR_TZ_ID]) | |
453 | return -EINVAL; | |
454 | ||
455 | id = nla_get_u32(p->attrs[THERMAL_GENL_ATTR_TZ_ID]); | |
456 | ||
457 | tz = thermal_zone_get_by_id(id); | |
458 | if (!tz) | |
459 | return -EINVAL; | |
460 | ||
461 | ret = thermal_zone_get_temp(tz, &temp); | |
462 | if (ret) | |
463 | return ret; | |
464 | ||
465 | if (nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_ID, id) || | |
466 | nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TEMP, temp)) | |
467 | return -EMSGSIZE; | |
468 | ||
469 | return 0; | |
470 | } | |
471 | ||
472 | static int thermal_genl_cmd_tz_get_gov(struct param *p) | |
473 | { | |
474 | struct sk_buff *msg = p->msg; | |
475 | struct thermal_zone_device *tz; | |
476 | int id, ret = 0; | |
477 | ||
478 | if (!p->attrs[THERMAL_GENL_ATTR_TZ_ID]) | |
479 | return -EINVAL; | |
480 | ||
481 | id = nla_get_u32(p->attrs[THERMAL_GENL_ATTR_TZ_ID]); | |
482 | ||
483 | tz = thermal_zone_get_by_id(id); | |
484 | if (!tz) | |
485 | return -EINVAL; | |
486 | ||
487 | mutex_lock(&tz->lock); | |
488 | ||
489 | if (nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_ID, id) || | |
490 | nla_put_string(msg, THERMAL_GENL_ATTR_TZ_GOV_NAME, | |
491 | tz->governor->name)) | |
492 | ret = -EMSGSIZE; | |
493 | ||
494 | mutex_unlock(&tz->lock); | |
495 | ||
496 | return ret; | |
497 | } | |
498 | ||
499 | static int __thermal_genl_cmd_cdev_get(struct thermal_cooling_device *cdev, | |
500 | void *data) | |
501 | { | |
502 | struct sk_buff *msg = data; | |
503 | ||
504 | if (nla_put_u32(msg, THERMAL_GENL_ATTR_CDEV_ID, cdev->id)) | |
505 | return -EMSGSIZE; | |
506 | ||
507 | if (nla_put_string(msg, THERMAL_GENL_ATTR_CDEV_NAME, cdev->type)) | |
508 | return -EMSGSIZE; | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | static int thermal_genl_cmd_cdev_get(struct param *p) | |
514 | { | |
515 | struct sk_buff *msg = p->msg; | |
516 | struct nlattr *start_cdev; | |
517 | int ret; | |
518 | ||
519 | start_cdev = nla_nest_start(msg, THERMAL_GENL_ATTR_CDEV); | |
520 | if (!start_cdev) | |
521 | return -EMSGSIZE; | |
522 | ||
523 | ret = for_each_thermal_cooling_device(__thermal_genl_cmd_cdev_get, msg); | |
524 | if (ret) | |
525 | goto out_cancel_nest; | |
526 | ||
527 | nla_nest_end(msg, start_cdev); | |
528 | ||
529 | return 0; | |
530 | out_cancel_nest: | |
531 | nla_nest_cancel(msg, start_cdev); | |
532 | ||
533 | return ret; | |
534 | } | |
535 | ||
536 | static cb_t cmd_cb[] = { | |
537 | [THERMAL_GENL_CMD_TZ_GET_ID] = thermal_genl_cmd_tz_get_id, | |
538 | [THERMAL_GENL_CMD_TZ_GET_TRIP] = thermal_genl_cmd_tz_get_trip, | |
539 | [THERMAL_GENL_CMD_TZ_GET_TEMP] = thermal_genl_cmd_tz_get_temp, | |
540 | [THERMAL_GENL_CMD_TZ_GET_GOV] = thermal_genl_cmd_tz_get_gov, | |
541 | [THERMAL_GENL_CMD_CDEV_GET] = thermal_genl_cmd_cdev_get, | |
542 | }; | |
543 | ||
544 | static int thermal_genl_cmd_dumpit(struct sk_buff *skb, | |
545 | struct netlink_callback *cb) | |
546 | { | |
547 | struct param p = { .msg = skb }; | |
548 | const struct genl_dumpit_info *info = genl_dumpit_info(cb); | |
0b588afd | 549 | int cmd = info->op.cmd; |
52674f56 | 550 | int ret; |
1ce50e7d DL |
551 | void *hdr; |
552 | ||
553 | hdr = genlmsg_put(skb, 0, 0, &thermal_gnl_family, 0, cmd); | |
554 | if (!hdr) | |
555 | return -EMSGSIZE; | |
556 | ||
557 | ret = cmd_cb[cmd](&p); | |
558 | if (ret) | |
559 | goto out_cancel_msg; | |
560 | ||
561 | genlmsg_end(skb, hdr); | |
562 | ||
563 | return 0; | |
564 | ||
565 | out_cancel_msg: | |
566 | genlmsg_cancel(skb, hdr); | |
567 | ||
568 | return ret; | |
569 | } | |
570 | ||
571 | static int thermal_genl_cmd_doit(struct sk_buff *skb, | |
572 | struct genl_info *info) | |
573 | { | |
574 | struct param p = { .attrs = info->attrs }; | |
575 | struct sk_buff *msg; | |
576 | void *hdr; | |
577 | int cmd = info->genlhdr->cmd; | |
578 | int ret = -EMSGSIZE; | |
579 | ||
580 | msg = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
581 | if (!msg) | |
582 | return -ENOMEM; | |
583 | p.msg = msg; | |
584 | ||
585 | hdr = genlmsg_put_reply(msg, info, &thermal_gnl_family, 0, cmd); | |
586 | if (!hdr) | |
587 | goto out_free_msg; | |
588 | ||
589 | ret = cmd_cb[cmd](&p); | |
590 | if (ret) | |
591 | goto out_cancel_msg; | |
592 | ||
593 | genlmsg_end(msg, hdr); | |
594 | ||
595 | return genlmsg_reply(msg, info); | |
596 | ||
597 | out_cancel_msg: | |
598 | genlmsg_cancel(msg, hdr); | |
599 | out_free_msg: | |
600 | nlmsg_free(msg); | |
601 | ||
602 | return ret; | |
603 | } | |
604 | ||
66a9b928 | 605 | static const struct genl_small_ops thermal_genl_ops[] = { |
1ce50e7d DL |
606 | { |
607 | .cmd = THERMAL_GENL_CMD_TZ_GET_ID, | |
608 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
609 | .dumpit = thermal_genl_cmd_dumpit, | |
610 | }, | |
611 | { | |
612 | .cmd = THERMAL_GENL_CMD_TZ_GET_TRIP, | |
613 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
614 | .doit = thermal_genl_cmd_doit, | |
615 | }, | |
616 | { | |
617 | .cmd = THERMAL_GENL_CMD_TZ_GET_TEMP, | |
618 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
619 | .doit = thermal_genl_cmd_doit, | |
620 | }, | |
621 | { | |
622 | .cmd = THERMAL_GENL_CMD_TZ_GET_GOV, | |
623 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
624 | .doit = thermal_genl_cmd_doit, | |
625 | }, | |
626 | { | |
627 | .cmd = THERMAL_GENL_CMD_CDEV_GET, | |
628 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
629 | .dumpit = thermal_genl_cmd_dumpit, | |
630 | }, | |
631 | }; | |
632 | ||
633 | static struct genl_family thermal_gnl_family __ro_after_init = { | |
634 | .hdrsize = 0, | |
635 | .name = THERMAL_GENL_FAMILY_NAME, | |
636 | .version = THERMAL_GENL_VERSION, | |
637 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
638 | .policy = thermal_genl_policy, | |
66a9b928 JK |
639 | .small_ops = thermal_genl_ops, |
640 | .n_small_ops = ARRAY_SIZE(thermal_genl_ops), | |
1ce50e7d DL |
641 | .mcgrps = thermal_genl_mcgrps, |
642 | .n_mcgrps = ARRAY_SIZE(thermal_genl_mcgrps), | |
643 | }; | |
644 | ||
d2a89b52 | 645 | int __init thermal_netlink_init(void) |
1ce50e7d DL |
646 | { |
647 | return genl_register_family(&thermal_gnl_family); | |
648 | } |