1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Thermal monitoring tool based on the thermal netlink events.
4 *
5 * Copyright (C) 2022 Linaro Ltd.
6 *
7 * Author: Daniel Lezcano <daniel.lezcano@kernel.org>
8 */
9 #include <errno.h>
10 #include <fcntl.h>
11 #include <getopt.h>
12 #include <libgen.h>
13 #include <limits.h>
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <string.h>
17 #include <signal.h>
18 #include <unistd.h>
19
20 #include <syslog.h>
21
22 #include <sys/epoll.h>
23 #include <sys/stat.h>
24 #include <sys/types.h>
25
26 #include <thermal.h>
27 #include "thermal-tools.h"
28
29 struct options {
30 int loglevel;
31 int logopt;
32 int interactive;
33 int daemonize;
34 };
35
36 struct thermal_data {
37 struct thermal_zone *tz;
38 struct thermal_handler *th;
39 };
40
show_trip(struct thermal_trip * tt,__maybe_unused void * arg)41 static int show_trip(struct thermal_trip *tt, __maybe_unused void *arg)
42 {
43 INFO("trip id=%d, type=%d, temp=%d, hyst=%d\n",
44 tt->id, tt->type, tt->temp, tt->hyst);
45
46 return 0;
47 }
48
show_temp(struct thermal_zone * tz,__maybe_unused void * arg)49 static int show_temp(struct thermal_zone *tz, __maybe_unused void *arg)
50 {
51 thermal_cmd_get_temp(arg, tz);
52
53 INFO("temperature: %d\n", tz->temp);
54
55 return 0;
56 }
57
show_governor(struct thermal_zone * tz,__maybe_unused void * arg)58 static int show_governor(struct thermal_zone *tz, __maybe_unused void *arg)
59 {
60 thermal_cmd_get_governor(arg, tz);
61
62 INFO("governor: '%s'\n", tz->governor);
63
64 return 0;
65 }
66
show_tz(struct thermal_zone * tz,__maybe_unused void * arg)67 static int show_tz(struct thermal_zone *tz, __maybe_unused void *arg)
68 {
69 INFO("thermal zone '%s', id=%d\n", tz->name, tz->id);
70
71 for_each_thermal_trip(tz->trip, show_trip, NULL);
72
73 show_temp(tz, arg);
74
75 show_governor(tz, arg);
76
77 return 0;
78 }
79
tz_create(const char * name,int tz_id,__maybe_unused void * arg)80 static int tz_create(const char *name, int tz_id, __maybe_unused void *arg)
81 {
82 INFO("Thermal zone '%s'/%d created\n", name, tz_id);
83
84 return 0;
85 }
86
tz_delete(int tz_id,__maybe_unused void * arg)87 static int tz_delete(int tz_id, __maybe_unused void *arg)
88 {
89 INFO("Thermal zone %d deleted\n", tz_id);
90
91 return 0;
92 }
93
tz_disable(int tz_id,void * arg)94 static int tz_disable(int tz_id, void *arg)
95 {
96 struct thermal_data *td = arg;
97 struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
98
99 INFO("Thermal zone %d ('%s') disabled\n", tz_id, tz->name);
100
101 return 0;
102 }
103
tz_enable(int tz_id,void * arg)104 static int tz_enable(int tz_id, void *arg)
105 {
106 struct thermal_data *td = arg;
107 struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
108
109 INFO("Thermal zone %d ('%s') enabled\n", tz_id, tz->name);
110
111 return 0;
112 }
113
trip_high(int tz_id,int trip_id,int temp,void * arg)114 static int trip_high(int tz_id, int trip_id, int temp, void *arg)
115 {
116 struct thermal_data *td = arg;
117 struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
118
119 INFO("Thermal zone %d ('%s'): trip point %d crossed way up with %d °C\n",
120 tz_id, tz->name, trip_id, temp);
121
122 return 0;
123 }
124
trip_low(int tz_id,int trip_id,int temp,void * arg)125 static int trip_low(int tz_id, int trip_id, int temp, void *arg)
126 {
127 struct thermal_data *td = arg;
128 struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
129
130 INFO("Thermal zone %d ('%s'): trip point %d crossed way down with %d °C\n",
131 tz_id, tz->name, trip_id, temp);
132
133 return 0;
134 }
135
trip_add(int tz_id,int trip_id,int type,int temp,int hyst,__maybe_unused void * arg)136 static int trip_add(int tz_id, int trip_id, int type, int temp, int hyst, __maybe_unused void *arg)
137 {
138 INFO("Trip point added %d: id=%d, type=%d, temp=%d, hyst=%d\n",
139 tz_id, trip_id, type, temp, hyst);
140
141 return 0;
142 }
143
trip_delete(int tz_id,int trip_id,__maybe_unused void * arg)144 static int trip_delete(int tz_id, int trip_id, __maybe_unused void *arg)
145 {
146 INFO("Trip point deleted %d: id=%d\n", tz_id, trip_id);
147
148 return 0;
149 }
150
trip_change(int tz_id,int trip_id,int type,int temp,int hyst,__maybe_unused void * arg)151 static int trip_change(int tz_id, int trip_id, int type, int temp,
152 int hyst, __maybe_unused void *arg)
153 {
154 struct thermal_data *td = arg;
155 struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
156
157 INFO("Trip point changed %d: id=%d, type=%d, temp=%d, hyst=%d\n",
158 tz_id, trip_id, type, temp, hyst);
159
160 tz->trip[trip_id].type = type;
161 tz->trip[trip_id].temp = temp;
162 tz->trip[trip_id].hyst = hyst;
163
164 return 0;
165 }
166
cdev_add(const char * name,int cdev_id,int max_state,__maybe_unused void * arg)167 static int cdev_add(const char *name, int cdev_id, int max_state, __maybe_unused void *arg)
168 {
169 INFO("Cooling device '%s'/%d (max state=%d) added\n", name, cdev_id, max_state);
170
171 return 0;
172 }
173
cdev_delete(int cdev_id,__maybe_unused void * arg)174 static int cdev_delete(int cdev_id, __maybe_unused void *arg)
175 {
176 INFO("Cooling device %d deleted", cdev_id);
177
178 return 0;
179 }
180
cdev_update(int cdev_id,int cur_state,__maybe_unused void * arg)181 static int cdev_update(int cdev_id, int cur_state, __maybe_unused void *arg)
182 {
183 INFO("cdev:%d state:%d\n", cdev_id, cur_state);
184
185 return 0;
186 }
187
gov_change(int tz_id,const char * name,__maybe_unused void * arg)188 static int gov_change(int tz_id, const char *name, __maybe_unused void *arg)
189 {
190 struct thermal_data *td = arg;
191 struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
192
193 INFO("%s: governor changed %s -> %s\n", tz->name, tz->governor, name);
194
195 strcpy(tz->governor, name);
196
197 return 0;
198 }
199
200 static struct thermal_ops ops = {
201 .events.tz_create = tz_create,
202 .events.tz_delete = tz_delete,
203 .events.tz_disable = tz_disable,
204 .events.tz_enable = tz_enable,
205 .events.trip_high = trip_high,
206 .events.trip_low = trip_low,
207 .events.trip_add = trip_add,
208 .events.trip_delete = trip_delete,
209 .events.trip_change = trip_change,
210 .events.cdev_add = cdev_add,
211 .events.cdev_delete = cdev_delete,
212 .events.cdev_update = cdev_update,
213 .events.gov_change = gov_change
214 };
215
thermal_event(__maybe_unused int fd,__maybe_unused void * arg)216 static int thermal_event(__maybe_unused int fd, __maybe_unused void *arg)
217 {
218 struct thermal_data *td = arg;
219
220 return thermal_events_handle(td->th, td);
221 }
222
usage(const char * cmd)223 static void usage(const char *cmd)
224 {
225 printf("%s : A thermal monitoring engine based on notifications\n", cmd);
226 printf("Usage: %s [options]\n", cmd);
227 printf("\t-h, --help\t\tthis help\n");
228 printf("\t-d, --daemonize\n");
229 printf("\t-l <level>, --loglevel <level>\tlog level: ");
230 printf("DEBUG, INFO, NOTICE, WARN, ERROR\n");
231 printf("\t-s, --syslog\t\toutput to syslog\n");
232 printf("\n");
233 exit(0);
234 }
235
options_init(int argc,char * argv[],struct options * options)236 static int options_init(int argc, char *argv[], struct options *options)
237 {
238 int opt;
239
240 struct option long_options[] = {
241 { "help", no_argument, NULL, 'h' },
242 { "daemonize", no_argument, NULL, 'd' },
243 { "syslog", no_argument, NULL, 's' },
244 { "loglevel", required_argument, NULL, 'l' },
245 { 0, 0, 0, 0 }
246 };
247
248 while (1) {
249
250 int optindex = 0;
251
252 opt = getopt_long(argc, argv, "l:dhs", long_options, &optindex);
253 if (opt == -1)
254 break;
255
256 switch (opt) {
257 case 'l':
258 options->loglevel = log_str2level(optarg);
259 break;
260 case 'd':
261 options->daemonize = 1;
262 break;
263 case 's':
264 options->logopt = TO_SYSLOG;
265 break;
266 case 'h':
267 usage(basename(argv[0]));
268 break;
269 default: /* '?' */
270 return -1;
271 }
272 }
273
274 return 0;
275 }
276
277 enum {
278 THERMAL_ENGINE_SUCCESS = 0,
279 THERMAL_ENGINE_OPTION_ERROR,
280 THERMAL_ENGINE_DAEMON_ERROR,
281 THERMAL_ENGINE_LOG_ERROR,
282 THERMAL_ENGINE_THERMAL_ERROR,
283 THERMAL_ENGINE_MAINLOOP_ERROR,
284 };
285
main(int argc,char * argv[])286 int main(int argc, char *argv[])
287 {
288 struct thermal_data td;
289 struct options options = {
290 .loglevel = LOG_INFO,
291 .logopt = TO_STDOUT,
292 };
293
294 if (options_init(argc, argv, &options)) {
295 ERROR("Usage: %s --help\n", argv[0]);
296 return THERMAL_ENGINE_OPTION_ERROR;
297 }
298
299 if (options.daemonize && daemon(0, 0)) {
300 ERROR("Failed to daemonize: %p\n");
301 return THERMAL_ENGINE_DAEMON_ERROR;
302 }
303
304 if (log_init(options.loglevel, basename(argv[0]), options.logopt)) {
305 ERROR("Failed to initialize logging facility\n");
306 return THERMAL_ENGINE_LOG_ERROR;
307 }
308
309 td.th = thermal_init(&ops);
310 if (!td.th) {
311 ERROR("Failed to initialize the thermal library\n");
312 return THERMAL_ENGINE_THERMAL_ERROR;
313 }
314
315 td.tz = thermal_zone_discover(td.th);
316 if (!td.tz) {
317 ERROR("No thermal zone available\n");
318 return THERMAL_ENGINE_THERMAL_ERROR;
319 }
320
321 for_each_thermal_zone(td.tz, show_tz, td.th);
322
323 if (mainloop_init()) {
324 ERROR("Failed to initialize the mainloop\n");
325 return THERMAL_ENGINE_MAINLOOP_ERROR;
326 }
327
328 if (mainloop_add(thermal_events_fd(td.th), thermal_event, &td)) {
329 ERROR("Failed to setup the mainloop\n");
330 return THERMAL_ENGINE_MAINLOOP_ERROR;
331 }
332
333 INFO("Waiting for thermal events ...\n");
334
335 if (mainloop(-1)) {
336 ERROR("Mainloop failed\n");
337 return THERMAL_ENGINE_MAINLOOP_ERROR;
338 }
339
340 return THERMAL_ENGINE_SUCCESS;
341 }
342