// SPDX-License-Identifier: GPL-2.0-only
/*
* Thermal monitoring tool based on the thermal netlink events.
*
* Copyright (C) 2022 Linaro Ltd.
*
* Author: Daniel Lezcano <[email protected]>
*/
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <libgen.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <syslog.h>
#include <sys/epoll.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <thermal.h>
#include "thermal-tools.h"
struct options {
int loglevel;
int logopt;
int interactive;
int daemonize;
};
struct thermal_data {
struct thermal_zone *tz;
struct thermal_handler *th;
};
static int show_trip(struct thermal_trip *tt, __maybe_unused void *arg)
{
INFO("trip id=%d, type=%d, temp=%d, hyst=%d\n",
tt->id, tt->type, tt->temp, tt->hyst);
return 0;
}
static int show_temp(struct thermal_zone *tz, __maybe_unused void *arg)
{
thermal_cmd_get_temp(arg, tz);
INFO("temperature: %d\n", tz->temp);
return 0;
}
static int show_governor(struct thermal_zone *tz, __maybe_unused void *arg)
{
thermal_cmd_get_governor(arg, tz);
INFO("governor: '%s'\n", tz->governor);
return 0;
}
static int show_tz(struct thermal_zone *tz, __maybe_unused void *arg)
{
INFO("thermal zone '%s', id=%d\n", tz->name, tz->id);
for_each_thermal_trip(tz->trip, show_trip, NULL);
show_temp(tz, arg);
show_governor(tz, arg);
return 0;
}
static int tz_create(const char *name, int tz_id, __maybe_unused void *arg)
{
INFO("Thermal zone '%s'/%d created\n", name, tz_id);
return 0;
}
static int tz_delete(int tz_id, __maybe_unused void *arg)
{
INFO("Thermal zone %d deleted\n", tz_id);
return 0;
}
static int tz_disable(int tz_id, void *arg)
{
struct thermal_data *td = arg;
struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
INFO("Thermal zone %d ('%s') disabled\n", tz_id, tz->name);
return 0;
}
static int tz_enable(int tz_id, void *arg)
{
struct thermal_data *td = arg;
struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
INFO("Thermal zone %d ('%s') enabled\n", tz_id, tz->name);
return 0;
}
static int trip_high(int tz_id, int trip_id, int temp, void *arg)
{
struct thermal_data *td = arg;
struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
INFO("Thermal zone %d ('%s'): trip point %d crossed way up with %d °C\n",
tz_id, tz->name, trip_id, temp);
return 0;
}
static int trip_low(int tz_id, int trip_id, int temp, void *arg)
{
struct thermal_data *td = arg;
struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
INFO("Thermal zone %d ('%s'): trip point %d crossed way down with %d °C\n",
tz_id, tz->name, trip_id, temp);
return 0;
}
static int trip_add(int tz_id, int trip_id, int type, int temp, int hyst, __maybe_unused void *arg)
{
INFO("Trip point added %d: id=%d, type=%d, temp=%d, hyst=%d\n",
tz_id, trip_id, type, temp, hyst);
return 0;
}
static int trip_delete(int tz_id, int trip_id, __maybe_unused void *arg)
{
INFO("Trip point deleted %d: id=%d\n", tz_id, trip_id);
return 0;
}
static int trip_change(int tz_id, int trip_id, int type, int temp,
int hyst, __maybe_unused void *arg)
{
struct thermal_data *td = arg;
struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
INFO("Trip point changed %d: id=%d, type=%d, temp=%d, hyst=%d\n",
tz_id, trip_id, type, temp, hyst);
tz->trip[trip_id].type = type;
tz->trip[trip_id].temp = temp;
tz->trip[trip_id].hyst = hyst;
return 0;
}
static int cdev_add(const char *name, int cdev_id, int max_state, __maybe_unused void *arg)
{
INFO("Cooling device '%s'/%d (max state=%d) added\n", name, cdev_id, max_state);
return 0;
}
static int cdev_delete(int cdev_id, __maybe_unused void *arg)
{
INFO("Cooling device %d deleted", cdev_id);
return 0;
}
static int cdev_update(int cdev_id, int cur_state, __maybe_unused void *arg)
{
INFO("cdev:%d state:%d\n", cdev_id, cur_state);
return 0;
}
static int gov_change(int tz_id, const char *name, __maybe_unused void *arg)
{
struct thermal_data *td = arg;
struct thermal_zone *tz = thermal_zone_find_by_id(td->tz, tz_id);
INFO("%s: governor changed %s -> %s\n", tz->name, tz->governor, name);
strcpy(tz->governor, name);
return 0;
}
static struct thermal_ops ops = {
.events.tz_create = tz_create,
.events.tz_delete = tz_delete,
.events.tz_disable = tz_disable,
.events.tz_enable = tz_enable,
.events.trip_high = trip_high,
.events.trip_low = trip_low,
.events.trip_add = trip_add,
.events.trip_delete = trip_delete,
.events.trip_change = trip_change,
.events.cdev_add = cdev_add,
.events.cdev_delete = cdev_delete,
.events.cdev_update = cdev_update,
.events.gov_change = gov_change
};
static int thermal_event(__maybe_unused int fd, __maybe_unused void *arg)
{
struct thermal_data *td = arg;
return thermal_events_handle(td->th, td);
}
static void usage(const char *cmd)
{
printf("%s : A thermal monitoring engine based on notifications\n", cmd);
printf("Usage: %s [options]\n", cmd);
printf("\t-h, --help\t\tthis help\n");
printf("\t-d, --daemonize\n");
printf("\t-l <level>, --loglevel <level>\tlog level: ");
printf("DEBUG, INFO, NOTICE, WARN, ERROR\n");
printf("\t-s, --syslog\t\toutput to syslog\n");
printf("\n");
exit(0);
}
static int options_init(int argc, char *argv[], struct options *options)
{
int opt;
struct option long_options[] = {
{ "help", no_argument, NULL, 'h' },
{ "daemonize", no_argument, NULL, 'd' },
{ "syslog", no_argument, NULL, 's' },
{ "loglevel", required_argument, NULL, 'l' },
{ 0, 0, 0, 0 }
};
while (1) {
int optindex = 0;
opt = getopt_long(argc, argv, "l:dhs", long_options, &optindex);
if (opt == -1)
break;
switch (opt) {
case 'l':
options->loglevel = log_str2level(optarg);
break;
case 'd':
options->daemonize = 1;
break;
case 's':
options->logopt = TO_SYSLOG;
break;
case 'h':
usage(basename(argv[0]));
break;
default: /* '?' */
return -1;
}
}
return 0;
}
enum {
THERMAL_ENGINE_SUCCESS = 0,
THERMAL_ENGINE_OPTION_ERROR,
THERMAL_ENGINE_DAEMON_ERROR,
THERMAL_ENGINE_LOG_ERROR,
THERMAL_ENGINE_THERMAL_ERROR,
THERMAL_ENGINE_MAINLOOP_ERROR,
};
int main(int argc, char *argv[])
{
struct thermal_data td;
struct options options = {
.loglevel = LOG_INFO,
.logopt = TO_STDOUT,
};
if (options_init(argc, argv, &options)) {
ERROR("Usage: %s --help\n", argv[0]);
return THERMAL_ENGINE_OPTION_ERROR;
}
if (options.daemonize && daemon(0, 0)) {
ERROR("Failed to daemonize: %p\n");
return THERMAL_ENGINE_DAEMON_ERROR;
}
if (log_init(options.loglevel, basename(argv[0]), options.logopt)) {
ERROR("Failed to initialize logging facility\n");
return THERMAL_ENGINE_LOG_ERROR;
}
td.th = thermal_init(&ops);
if (!td.th) {
ERROR("Failed to initialize the thermal library\n");
return THERMAL_ENGINE_THERMAL_ERROR;
}
td.tz = thermal_zone_discover(td.th);
if (!td.tz) {
ERROR("No thermal zone available\n");
return THERMAL_ENGINE_THERMAL_ERROR;
}
for_each_thermal_zone(td.tz, show_tz, td.th);
if (mainloop_init()) {
ERROR("Failed to initialize the mainloop\n");
return THERMAL_ENGINE_MAINLOOP_ERROR;
}
if (mainloop_add(thermal_events_fd(td.th), thermal_event, &td)) {
ERROR("Failed to setup the mainloop\n");
return THERMAL_ENGINE_MAINLOOP_ERROR;
}
INFO("Waiting for thermal events ...\n");
if (mainloop(-1)) {
ERROR("Mainloop failed\n");
return THERMAL_ENGINE_MAINLOOP_ERROR;
}
return THERMAL_ENGINE_SUCCESS;
}
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