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-rw-r--r--tools/power/x86/intel-speed-select/isst-daemon.c244
1 files changed, 244 insertions, 0 deletions
diff --git a/tools/power/x86/intel-speed-select/isst-daemon.c b/tools/power/x86/intel-speed-select/isst-daemon.c
new file mode 100644
index 000000000000..dd372924bc82
--- /dev/null
+++ b/tools/power/x86/intel-speed-select/isst-daemon.c
@@ -0,0 +1,244 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel Speed Select -- Allow speed select to daemonize
+ * Copyright (c) 2022 Intel Corporation.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/file.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <getopt.h>
+#include <signal.h>
+#include <time.h>
+
+#include "isst.h"
+
+static int per_package_levels_info[MAX_PACKAGE_COUNT][MAX_DIE_PER_PACKAGE];
+static time_t per_package_levels_tm[MAX_PACKAGE_COUNT][MAX_DIE_PER_PACKAGE];
+
+static void init_levels(void)
+{
+ int i, j;
+
+ for (i = 0; i < MAX_PACKAGE_COUNT; ++i)
+ for (j = 0; j < MAX_DIE_PER_PACKAGE; ++j)
+ per_package_levels_info[i][j] = -1;
+}
+
+void process_level_change(int cpu)
+{
+ struct isst_pkg_ctdp_level_info ctdp_level;
+ int pkg_id = get_physical_package_id(cpu);
+ int die_id = get_physical_die_id(cpu);
+ struct isst_pkg_ctdp pkg_dev;
+ time_t tm;
+ int ret;
+
+ if (pkg_id >= MAX_PACKAGE_COUNT || die_id > MAX_DIE_PER_PACKAGE) {
+ debug_printf("Invalid package/die info for cpu:%d\n", cpu);
+ return;
+ }
+
+ tm = time(NULL);
+ if (tm - per_package_levels_tm[pkg_id][die_id] < 2 )
+ return;
+
+ per_package_levels_tm[pkg_id][die_id] = tm;
+
+ ret = isst_get_ctdp_levels(cpu, &pkg_dev);
+ if (ret) {
+ debug_printf("Can't get tdp levels for cpu:%d\n", cpu);
+ return;
+ }
+
+ debug_printf("Get Config level %d pkg:%d die:%d current_level:%d \n", cpu,
+ pkg_id, die_id, pkg_dev.current_level);
+
+ if (pkg_dev.locked) {
+ debug_printf("config TDP s locked \n");
+ return;
+ }
+
+ if (per_package_levels_info[pkg_id][die_id] == pkg_dev.current_level)
+ return;
+
+ debug_printf("**Config level change for cpu:%d pkg:%d die:%d from %d to %d\n",
+ cpu, pkg_id, die_id, per_package_levels_info[pkg_id][die_id],
+ pkg_dev.current_level);
+
+ per_package_levels_info[pkg_id][die_id] = pkg_dev.current_level;
+
+ ctdp_level.core_cpumask_size =
+ alloc_cpu_set(&ctdp_level.core_cpumask);
+ ret = isst_get_coremask_info(cpu, pkg_dev.current_level, &ctdp_level);
+ if (ret) {
+ free_cpu_set(ctdp_level.core_cpumask);
+ debug_printf("Can't get core_mask:%d\n", cpu);
+ return;
+ }
+
+ if (ctdp_level.cpu_count) {
+ int i, max_cpus = get_topo_max_cpus();
+ for (i = 0; i < max_cpus; ++i) {
+ if (pkg_id != get_physical_package_id(i) || die_id != get_physical_die_id(i))
+ continue;
+ if (CPU_ISSET_S(i, ctdp_level.core_cpumask_size, ctdp_level.core_cpumask)) {
+ fprintf(stderr, "online cpu %d\n", i);
+ set_cpu_online_offline(i, 1);
+ } else {
+ fprintf(stderr, "offline cpu %d\n", i);
+ set_cpu_online_offline(i, 0);
+ }
+ }
+ }
+
+ free_cpu_set(ctdp_level.core_cpumask);
+}
+
+static void _poll_for_config_change(int cpu, void *arg1, void *arg2,
+ void *arg3, void *arg4)
+{
+ process_level_change(cpu);
+}
+
+static void poll_for_config_change(void)
+{
+ for_each_online_package_in_set(_poll_for_config_change, NULL, NULL,
+ NULL, NULL);
+}
+
+static int done = 0;
+static int pid_file_handle;
+
+static void signal_handler(int sig)
+{
+ switch (sig) {
+ case SIGINT:
+ case SIGTERM:
+ done = 1;
+ hfi_exit();
+ exit(0);
+ break;
+ default:
+ break;
+ }
+}
+
+static void daemonize(char *rundir, char *pidfile)
+{
+ int pid, sid, i;
+ char str[10];
+ struct sigaction sig_actions;
+ sigset_t sig_set;
+ int ret;
+
+ if (getppid() == 1)
+ return;
+
+ sigemptyset(&sig_set);
+ sigaddset(&sig_set, SIGCHLD);
+ sigaddset(&sig_set, SIGTSTP);
+ sigaddset(&sig_set, SIGTTOU);
+ sigaddset(&sig_set, SIGTTIN);
+ sigprocmask(SIG_BLOCK, &sig_set, NULL);
+
+ sig_actions.sa_handler = signal_handler;
+ sigemptyset(&sig_actions.sa_mask);
+ sig_actions.sa_flags = 0;
+
+ sigaction(SIGHUP, &sig_actions, NULL);
+ sigaction(SIGTERM, &sig_actions, NULL);
+ sigaction(SIGINT, &sig_actions, NULL);
+
+ pid = fork();
+ if (pid < 0) {
+ /* Could not fork */
+ exit(EXIT_FAILURE);
+ }
+ if (pid > 0)
+ exit(EXIT_SUCCESS);
+
+ umask(027);
+
+ sid = setsid();
+ if (sid < 0)
+ exit(EXIT_FAILURE);
+
+ /* close all descriptors */
+ for (i = getdtablesize(); i >= 0; --i)
+ close(i);
+
+ i = open("/dev/null", O_RDWR);
+ ret = dup(i);
+ if (ret == -1)
+ exit(EXIT_FAILURE);
+
+ ret = dup(i);
+ if (ret == -1)
+ exit(EXIT_FAILURE);
+
+ ret = chdir(rundir);
+ if (ret == -1)
+ exit(EXIT_FAILURE);
+
+ pid_file_handle = open(pidfile, O_RDWR | O_CREAT, 0600);
+ if (pid_file_handle == -1) {
+ /* Couldn't open lock file */
+ exit(1);
+ }
+ /* Try to lock file */
+#ifdef LOCKF_SUPPORT
+ if (lockf(pid_file_handle, F_TLOCK, 0) == -1) {
+#else
+ if (flock(pid_file_handle, LOCK_EX|LOCK_NB) < 0) {
+#endif
+ /* Couldn't get lock on lock file */
+ fprintf(stderr, "Couldn't get lock file %d\n", getpid());
+ exit(1);
+ }
+ snprintf(str, sizeof(str), "%d\n", getpid());
+ ret = write(pid_file_handle, str, strlen(str));
+ if (ret == -1)
+ exit(EXIT_FAILURE);
+
+ close(i);
+}
+
+int isst_daemon(int debug_mode, int poll_interval, int no_daemon)
+{
+ int ret;
+
+ if (!no_daemon && poll_interval < 0 && !debug_mode) {
+ fprintf(stderr, "OOB mode is enabled and will run as daemon\n");
+ daemonize((char *) "/tmp/",
+ (char *)"/tmp/hfi-events.pid");
+ } else {
+ signal(SIGINT, signal_handler);
+ }
+
+ init_levels();
+
+ if (poll_interval < 0) {
+ ret = hfi_main();
+ if (ret) {
+ fprintf(stderr, "HFI initialization failed\n");
+ }
+ fprintf(stderr, "Must specify poll-interval\n");
+ return ret;
+ }
+
+ debug_printf("Starting loop\n");
+ while (!done) {
+ sleep(poll_interval);
+ poll_for_config_change();
+ }
+
+ return 0;
+}