2 * tmon.c Thermal Monitor (TMON) main function and entry point
4 * Copyright (C) 2012 Intel Corporation. All rights reserved.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 or later as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * Author: Jacob Pan <jacob.jun.pan@linux.intel.com>
24 #include <sys/types.h>
39 unsigned long ticktime = 1; /* seconds */
40 unsigned long no_control = 1; /* monitoring only or use cooling device for
41 * temperature control.
43 double time_elapsed = 0.0;
44 unsigned long target_temp_user = 65; /* can be select by tui later */
47 static short daemon_mode;
48 static int logging; /* for recording thermal data to a file */
51 /*cooling device used for the PID controller */
52 char ctrl_cdev[CDEV_NAME_SIZE] = "None";
53 int target_thermal_zone; /* user selected target zone instance */
54 static void start_daemon_mode(void);
57 pthread_mutex_t input_lock;
60 printf("Usage: tmon [OPTION...]\n");
61 printf(" -c, --control cooling device in control\n");
62 printf(" -d, --daemon run as daemon, no TUI\n");
63 printf(" -g, --debug debug message in syslog\n");
64 printf(" -h, --help show this help message\n");
65 printf(" -l, --log log data to /var/tmp/tmon.log\n");
66 printf(" -t, --time-interval sampling time interval, > 1 sec.\n");
67 printf(" -T, --target-temp initial target temperature\n");
68 printf(" -v, --version show version\n");
69 printf(" -z, --zone target thermal zone id\n");
76 printf("TMON version %s\n", VERSION);
80 static void tmon_cleanup(void)
83 syslog(LOG_INFO, "TMON exit cleanup\n");
89 pthread_mutex_lock(&input_lock);
90 pthread_cancel(event_tid);
91 pthread_mutex_unlock(&input_lock);
92 pthread_mutex_destroy(&input_lock);
95 /* relax control knobs, undo throttling */
98 keypad(stdscr, FALSE);
109 static void tmon_sig_handler(int sig)
111 syslog(LOG_INFO, "TMON caught signal %d\n", sig);
115 printf("sigterm, exit and clean up\n");
119 printf("sigkill, exit and clean up\n");
123 printf("ctrl-c, exit and clean up\n");
133 static void start_syslog(void)
136 setlogmask(LOG_UPTO(LOG_DEBUG));
138 setlogmask(LOG_UPTO(LOG_ERR));
139 openlog("tmon.log", LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL0);
140 syslog(LOG_NOTICE, "TMON started by User %d", getuid());
143 static void prepare_logging(void)
150 /* open local data log file */
151 tmon_log = fopen(TMON_LOG_FILE, "w+");
153 syslog(LOG_ERR, "failed to open log file %s\n", TMON_LOG_FILE);
157 if (lstat(TMON_LOG_FILE, &logstat) < 0) {
158 syslog(LOG_ERR, "Unable to stat log file %s\n", TMON_LOG_FILE);
164 /* The log file must be a regular file owned by us */
165 if (S_ISLNK(logstat.st_mode)) {
166 syslog(LOG_ERR, "Log file is a symlink. Will not log\n");
172 if (logstat.st_uid != getuid()) {
173 syslog(LOG_ERR, "We don't own the log file. Not logging\n");
180 fprintf(tmon_log, "#----------- THERMAL SYSTEM CONFIG -------------\n");
181 for (i = 0; i < ptdata.nr_tz_sensor; i++) {
182 char binding_str[33]; /* size of long + 1 */
185 memset(binding_str, 0, sizeof(binding_str));
186 for (j = 0; j < 32; j++)
187 binding_str[j] = (ptdata.tzi[i].cdev_binding & 1<<j) ?
190 fprintf(tmon_log, "#thermal zone %s%02d cdevs binding: %32s\n",
192 ptdata.tzi[i].instance,
194 for (j = 0; j < ptdata.tzi[i].nr_trip_pts; j++) {
195 fprintf(tmon_log, "#\tTP%02d type:%s, temp:%lu\n", j,
196 trip_type_name[ptdata.tzi[i].tp[j].type],
197 ptdata.tzi[i].tp[j].temp);
202 for (i = 0; i < ptdata.nr_cooling_dev; i++)
203 fprintf(tmon_log, "#cooling devices%02d: %s\n",
204 i, ptdata.cdi[i].type);
206 fprintf(tmon_log, "#---------- THERMAL DATA LOG STARTED -----------\n");
207 fprintf(tmon_log, "Samples TargetTemp ");
208 for (i = 0; i < ptdata.nr_tz_sensor; i++) {
209 fprintf(tmon_log, "%s%d ", ptdata.tzi[i].type,
210 ptdata.tzi[i].instance);
212 for (i = 0; i < ptdata.nr_cooling_dev; i++)
213 fprintf(tmon_log, "%s%d ", ptdata.cdi[i].type,
214 ptdata.cdi[i].instance);
216 fprintf(tmon_log, "\n");
219 static struct option opts[] = {
220 { "control", 1, NULL, 'c' },
221 { "daemon", 0, NULL, 'd' },
222 { "time-interval", 1, NULL, 't' },
223 { "target-temp", 1, NULL, 'T' },
224 { "log", 0, NULL, 'l' },
225 { "help", 0, NULL, 'h' },
226 { "version", 0, NULL, 'v' },
227 { "debug", 0, NULL, 'g' },
232 int main(int argc, char **argv)
236 double yk = 0.0, temp; /* controller output */
239 if (geteuid() != 0) {
240 printf("TMON needs to be run as root\n");
244 while ((c = getopt_long(argc, argv, "c:dlht:T:vgz:", opts, &id2)) != -1) {
248 strncpy(ctrl_cdev, optarg, CDEV_NAME_SIZE);
252 printf("Run TMON in daemon mode\n");
255 ticktime = strtod(optarg, NULL);
260 temp = strtod(optarg, NULL);
262 fprintf(stderr, "error: temperature must be positive\n");
265 target_temp_user = temp;
268 printf("Logging data to /var/tmp/tmon.log\n");
281 target_thermal_zone = strtod(optarg, NULL);
287 if (pthread_mutex_init(&input_lock, NULL) != 0) {
288 fprintf(stderr, "\n mutex init failed, exit\n");
292 if (signal(SIGINT, tmon_sig_handler) == SIG_ERR)
293 syslog(LOG_DEBUG, "Cannot handle SIGINT\n");
294 if (signal(SIGTERM, tmon_sig_handler) == SIG_ERR)
295 syslog(LOG_DEBUG, "Cannot handle SIGINT\n");
297 if (probe_thermal_sysfs()) {
298 pthread_mutex_destroy(&input_lock);
304 signal(SIGWINCH, resize_handler);
307 show_cooling_device();
308 update_thermal_data();
311 init_thermal_controller();
313 nodelay(stdscr, TRUE);
314 err = pthread_create(&event_tid, NULL, &handle_tui_events, NULL);
316 printf("\ncan't create thread :[%s]", strerror(err));
321 /* validate range of user selected target zone, default to the first
322 * instance if out of range
324 target_tz_index = zone_instance_to_index(target_thermal_zone);
325 if (target_tz_index < 0) {
326 target_thermal_zone = ptdata.tzi[0].instance;
327 syslog(LOG_ERR, "target zone is not found, default to %d\n",
328 target_thermal_zone);
334 update_thermal_data();
337 show_cooling_device();
339 time_elapsed += ticktime;
340 controller_handler(trec[0].temp[target_tz_index] / 1000,
342 trec[0].pid_out_pct = yk;
352 static void start_daemon_mode()
356 pid_t sid, pid = fork();
363 /* disable TUI, it may not be necessary, but saves some resource */
366 /* change the file mode mask */
367 umask(S_IWGRP | S_IWOTH);
369 /* new SID for the daemon process */
374 /* change working directory */
375 if ((chdir("/")) < 0)
382 close(STDOUT_FILENO);
383 close(STDERR_FILENO);