diff options
Diffstat (limited to 'tools/testing/selftests/thermal/intel/power_floor/power_floor_test.c')
-rw-r--r-- | tools/testing/selftests/thermal/intel/power_floor/power_floor_test.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/tools/testing/selftests/thermal/intel/power_floor/power_floor_test.c b/tools/testing/selftests/thermal/intel/power_floor/power_floor_test.c new file mode 100644 index 0000000000..0326b39a11 --- /dev/null +++ b/tools/testing/selftests/thermal/intel/power_floor/power_floor_test.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0 + +#define _GNU_SOURCE + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <poll.h> +#include <signal.h> + +#define POWER_FLOOR_ENABLE_ATTRIBUTE "/sys/bus/pci/devices/0000:00:04.0/power_limits/power_floor_enable" +#define POWER_FLOOR_STATUS_ATTRIBUTE "/sys/bus/pci/devices/0000:00:04.0/power_limits/power_floor_status" + +void power_floor_exit(int signum) +{ + int fd; + + /* Disable feature via sysfs knob */ + + fd = open(POWER_FLOOR_ENABLE_ATTRIBUTE, O_RDWR); + if (fd < 0) { + perror("Unable to open power floor enable file\n"); + exit(1); + } + + if (write(fd, "0\n", 2) < 0) { + perror("Can' disable power floor notifications\n"); + exit(1); + } + + printf("Disabled power floor notifications\n"); + + close(fd); +} + +int main(int argc, char **argv) +{ + struct pollfd ufd; + char status_str[3]; + int fd, ret; + + if (signal(SIGINT, power_floor_exit) == SIG_IGN) + signal(SIGINT, SIG_IGN); + if (signal(SIGHUP, power_floor_exit) == SIG_IGN) + signal(SIGHUP, SIG_IGN); + if (signal(SIGTERM, power_floor_exit) == SIG_IGN) + signal(SIGTERM, SIG_IGN); + + /* Enable feature via sysfs knob */ + fd = open(POWER_FLOOR_ENABLE_ATTRIBUTE, O_RDWR); + if (fd < 0) { + perror("Unable to open power floor enable file\n"); + exit(1); + } + + if (write(fd, "1\n", 2) < 0) { + perror("Can' enable power floor notifications\n"); + exit(1); + } + + close(fd); + + printf("Enabled power floor notifications\n"); + + while (1) { + fd = open(POWER_FLOOR_STATUS_ATTRIBUTE, O_RDONLY); + if (fd < 0) { + perror("Unable to power floor status file\n"); + exit(1); + } + + if ((lseek(fd, 0L, SEEK_SET)) < 0) { + fprintf(stderr, "Failed to set pointer to beginning\n"); + exit(1); + } + + if (read(fd, status_str, sizeof(status_str)) < 0) { + fprintf(stderr, "Failed to read from:%s\n", + POWER_FLOOR_STATUS_ATTRIBUTE); + exit(1); + } + + ufd.fd = fd; + ufd.events = POLLPRI; + + ret = poll(&ufd, 1, -1); + if (ret < 0) { + perror("poll error"); + exit(1); + } else if (ret == 0) { + printf("Poll Timeout\n"); + } else { + if ((lseek(fd, 0L, SEEK_SET)) < 0) { + fprintf(stderr, "Failed to set pointer to beginning\n"); + exit(1); + } + + if (read(fd, status_str, sizeof(status_str)) < 0) + exit(0); + + printf("power floor status: %s\n", status_str); + } + + close(fd); + } +} |