1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * tmon.c Thermal Monitor (TMON) main function and entry point
5 * Copyright (C) 2012 Intel Corporation. All rights reserved.
7 * Author: Jacob Pan <jacob.jun.pan@linux.intel.com>
15 #include <sys/types.h>
30 unsigned long ticktime = 1; /* seconds */
31 unsigned long no_control = 1; /* monitoring only or use cooling device for
32 * temperature control.
34 double time_elapsed = 0.0;
35 unsigned long target_temp_user = 65; /* can be select by tui later */
38 static short daemon_mode;
39 static int logging; /* for recording thermal data to a file */
42 /*cooling device used for the PID controller */
43 char ctrl_cdev[CDEV_NAME_SIZE] = "None";
44 int target_thermal_zone; /* user selected target zone instance */
45 static void start_daemon_mode(void);
48 pthread_mutex_t input_lock;
51 printf("Usage: tmon [OPTION...]\n");
52 printf(" -c, --control cooling device in control\n");
53 printf(" -d, --daemon run as daemon, no TUI\n");
54 printf(" -g, --debug debug message in syslog\n");
55 printf(" -h, --help show this help message\n");
56 printf(" -l, --log log data to /var/tmp/tmon.log\n");
57 printf(" -t, --time-interval sampling time interval, > 1 sec.\n");
58 printf(" -T, --target-temp initial target temperature\n");
59 printf(" -v, --version show version\n");
60 printf(" -z, --zone target thermal zone id\n");
67 printf("TMON version %s\n", VERSION);
71 static void tmon_cleanup(void)
73 syslog(LOG_INFO, "TMON exit cleanup\n");
79 pthread_mutex_lock(&input_lock);
80 pthread_cancel(event_tid);
81 pthread_mutex_unlock(&input_lock);
82 pthread_mutex_destroy(&input_lock);
85 /* relax control knobs, undo throttling */
88 keypad(stdscr, FALSE);
98 static void tmon_sig_handler(int sig)
100 syslog(LOG_INFO, "TMON caught signal %d\n", sig);
104 printf("sigterm, exit and clean up\n");
108 printf("sigkill, exit and clean up\n");
112 printf("ctrl-c, exit and clean up\n");
121 static void start_syslog(void)
124 setlogmask(LOG_UPTO(LOG_DEBUG));
126 setlogmask(LOG_UPTO(LOG_ERR));
127 openlog("tmon.log", LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL0);
128 syslog(LOG_NOTICE, "TMON started by User %d", getuid());
131 static void prepare_logging(void)
138 /* open local data log file */
139 tmon_log = fopen(TMON_LOG_FILE, "w+");
141 syslog(LOG_ERR, "failed to open log file %s\n", TMON_LOG_FILE);
145 if (lstat(TMON_LOG_FILE, &logstat) < 0) {
146 syslog(LOG_ERR, "Unable to stat log file %s\n", TMON_LOG_FILE);
152 /* The log file must be a regular file owned by us */
153 if (S_ISLNK(logstat.st_mode)) {
154 syslog(LOG_ERR, "Log file is a symlink. Will not log\n");
160 if (logstat.st_uid != getuid()) {
161 syslog(LOG_ERR, "We don't own the log file. Not logging\n");
167 fprintf(tmon_log, "#----------- THERMAL SYSTEM CONFIG -------------\n");
168 for (i = 0; i < ptdata.nr_tz_sensor; i++) {
169 char binding_str[33]; /* size of long + 1 */
172 memset(binding_str, 0, sizeof(binding_str));
173 for (j = 0; j < 32; j++)
174 binding_str[j] = (ptdata.tzi[i].cdev_binding & (1 << j)) ?
177 fprintf(tmon_log, "#thermal zone %s%02d cdevs binding: %32s\n",
179 ptdata.tzi[i].instance,
181 for (j = 0; j < ptdata.tzi[i].nr_trip_pts; j++) {
182 fprintf(tmon_log, "#\tTP%02d type:%s, temp:%lu\n", j,
183 trip_type_name[ptdata.tzi[i].tp[j].type],
184 ptdata.tzi[i].tp[j].temp);
188 for (i = 0; i < ptdata.nr_cooling_dev; i++)
189 fprintf(tmon_log, "#cooling devices%02d: %s\n",
190 i, ptdata.cdi[i].type);
192 fprintf(tmon_log, "#---------- THERMAL DATA LOG STARTED -----------\n");
193 fprintf(tmon_log, "Samples TargetTemp ");
194 for (i = 0; i < ptdata.nr_tz_sensor; i++) {
195 fprintf(tmon_log, "%s%d ", ptdata.tzi[i].type,
196 ptdata.tzi[i].instance);
198 for (i = 0; i < ptdata.nr_cooling_dev; i++)
199 fprintf(tmon_log, "%s%d ", ptdata.cdi[i].type,
200 ptdata.cdi[i].instance);
202 fprintf(tmon_log, "\n");
205 static struct option opts[] = {
206 { "control", 1, NULL, 'c' },
207 { "daemon", 0, NULL, 'd' },
208 { "time-interval", 1, NULL, 't' },
209 { "target-temp", 1, NULL, 'T' },
210 { "log", 0, NULL, 'l' },
211 { "help", 0, NULL, 'h' },
212 { "version", 0, NULL, 'v' },
213 { "debug", 0, NULL, 'g' },
217 int main(int argc, char **argv)
221 double yk = 0.0, temp; /* controller output */
224 if (geteuid() != 0) {
225 printf("TMON needs to be run as root\n");
229 while ((c = getopt_long(argc, argv, "c:dlht:T:vgz:", opts, &id2)) != -1) {
233 strncpy(ctrl_cdev, optarg, CDEV_NAME_SIZE);
237 printf("Run TMON in daemon mode\n");
240 ticktime = strtod(optarg, NULL);
245 temp = strtod(optarg, NULL);
247 fprintf(stderr, "error: temperature must be positive\n");
250 target_temp_user = temp;
253 printf("Logging data to /var/tmp/tmon.log\n");
266 target_thermal_zone = strtod(optarg, NULL);
272 if (pthread_mutex_init(&input_lock, NULL) != 0) {
273 fprintf(stderr, "\n mutex init failed, exit\n");
277 if (signal(SIGINT, tmon_sig_handler) == SIG_ERR)
278 syslog(LOG_DEBUG, "Cannot handle SIGINT\n");
279 if (signal(SIGTERM, tmon_sig_handler) == SIG_ERR)
280 syslog(LOG_DEBUG, "Cannot handle SIGTERM\n");
282 if (probe_thermal_sysfs()) {
283 pthread_mutex_destroy(&input_lock);
289 signal(SIGWINCH, resize_handler);
292 show_cooling_device();
293 update_thermal_data();
296 init_thermal_controller();
298 nodelay(stdscr, TRUE);
299 err = pthread_create(&event_tid, NULL, &handle_tui_events, NULL);
301 printf("\ncan't create thread :[%s]", strerror(err));
306 /* validate range of user selected target zone, default to the first
307 * instance if out of range
309 target_tz_index = zone_instance_to_index(target_thermal_zone);
310 if (target_tz_index < 0) {
311 target_thermal_zone = ptdata.tzi[0].instance;
312 syslog(LOG_ERR, "target zone is not found, default to %d\n",
313 target_thermal_zone);
319 update_thermal_data();
322 show_cooling_device();
324 time_elapsed += ticktime;
325 controller_handler(trec[0].temp[target_tz_index] / 1000, &yk);
326 trec[0].pid_out_pct = yk;
336 static void start_daemon_mode(void)
340 pid_t sid, pid = fork();
348 /* disable TUI, it may not be necessary, but saves some resource */
351 /* change the file mode mask */
352 umask(S_IWGRP | S_IWOTH);
354 /* new SID for the daemon process */
359 /* change working directory */
360 if ((chdir("/")) < 0)
366 close(STDOUT_FILENO);
367 close(STDERR_FILENO);