1 // SPDX-License-Identifier: GPL-2.0
3 * Intel Speed Select -- Allow speed select to daemonize
4 * Copyright (c) 2022 Intel Corporation.
14 #include <sys/types.h>
23 static int per_package_levels_info[MAX_PACKAGE_COUNT][MAX_DIE_PER_PACKAGE][MAX_PUNIT_PER_DIE];
24 static time_t per_package_levels_tm[MAX_PACKAGE_COUNT][MAX_DIE_PER_PACKAGE][MAX_PUNIT_PER_DIE];
26 static void init_levels(void)
30 for (i = 0; i < MAX_PACKAGE_COUNT; ++i)
31 for (j = 0; j < MAX_DIE_PER_PACKAGE; ++j)
32 for (k = 0; k < MAX_PUNIT_PER_DIE; ++k)
33 per_package_levels_info[i][j][k] = -1;
36 void process_level_change(struct isst_id *id)
38 struct isst_pkg_ctdp_level_info ctdp_level;
39 struct isst_pkg_ctdp pkg_dev;
43 if (id->pkg < 0 || id->die < 0 || id->punit < 0) {
44 debug_printf("Invalid package/die info for cpu:%d\n", id->cpu);
49 if (tm - per_package_levels_tm[id->pkg][id->die][id->punit] < 2)
52 per_package_levels_tm[id->pkg][id->die][id->punit] = tm;
54 ret = isst_get_ctdp_levels(id, &pkg_dev);
56 debug_printf("Can't get tdp levels for cpu:%d\n", id->cpu);
60 debug_printf("Get Config level %d pkg:%d die:%d current_level:%d\n", id->cpu,
61 id->pkg, id->die, pkg_dev.current_level);
64 debug_printf("config TDP s locked \n");
68 if (per_package_levels_info[id->pkg][id->die][id->punit] == pkg_dev.current_level)
71 debug_printf("**Config level change for cpu:%d pkg:%d die:%d from %d to %d\n",
72 id->cpu, id->pkg, id->die, per_package_levels_info[id->pkg][id->die][id->punit],
73 pkg_dev.current_level);
75 per_package_levels_info[id->pkg][id->die][id->punit] = pkg_dev.current_level;
77 ctdp_level.core_cpumask_size =
78 alloc_cpu_set(&ctdp_level.core_cpumask);
79 ret = isst_get_coremask_info(id, pkg_dev.current_level, &ctdp_level);
81 free_cpu_set(ctdp_level.core_cpumask);
82 debug_printf("Can't get core_mask:%d\n", id->cpu);
89 ret = enable_cpuset_controller();
93 isolate_cpus(id, ctdp_level.core_cpumask_size, ctdp_level.core_cpumask,
94 pkg_dev.current_level, 0);
100 if (ctdp_level.cpu_count) {
101 int i, max_cpus = get_topo_max_cpus();
102 for (i = 0; i < max_cpus; ++i) {
103 if (!is_cpu_in_power_domain(i, id))
105 if (CPU_ISSET_S(i, ctdp_level.core_cpumask_size, ctdp_level.core_cpumask)) {
106 fprintf(stderr, "online cpu %d\n", i);
107 set_cpu_online_offline(i, 1);
109 fprintf(stderr, "offline cpu %d\n", i);
110 set_cpu_online_offline(i, 0);
115 free_cpu_set(ctdp_level.core_cpumask);
118 static void _poll_for_config_change(struct isst_id *id, void *arg1, void *arg2,
119 void *arg3, void *arg4)
121 process_level_change(id);
124 static void poll_for_config_change(void)
126 for_each_online_power_domain_in_set(_poll_for_config_change, NULL, NULL,
131 static int pid_file_handle;
133 static void signal_handler(int sig)
147 static void daemonize(char *rundir, char *pidfile)
151 struct sigaction sig_actions;
158 sigemptyset(&sig_set);
159 sigaddset(&sig_set, SIGCHLD);
160 sigaddset(&sig_set, SIGTSTP);
161 sigaddset(&sig_set, SIGTTOU);
162 sigaddset(&sig_set, SIGTTIN);
163 sigprocmask(SIG_BLOCK, &sig_set, NULL);
165 sig_actions.sa_handler = signal_handler;
166 sigemptyset(&sig_actions.sa_mask);
167 sig_actions.sa_flags = 0;
169 sigaction(SIGHUP, &sig_actions, NULL);
170 sigaction(SIGTERM, &sig_actions, NULL);
171 sigaction(SIGINT, &sig_actions, NULL);
187 /* close all descriptors */
188 for (i = getdtablesize(); i >= 0; --i)
191 i = open("/dev/null", O_RDWR);
203 pid_file_handle = open(pidfile, O_RDWR | O_CREAT, 0600);
204 if (pid_file_handle == -1) {
205 /* Couldn't open lock file */
208 /* Try to lock file */
210 if (lockf(pid_file_handle, F_TLOCK, 0) == -1) {
212 if (flock(pid_file_handle, LOCK_EX|LOCK_NB) < 0) {
214 /* Couldn't get lock on lock file */
215 fprintf(stderr, "Couldn't get lock file %d\n", getpid());
218 snprintf(str, sizeof(str), "%d\n", getpid());
219 ret = write(pid_file_handle, str, strlen(str));
226 int isst_daemon(int debug_mode, int poll_interval, int no_daemon)
230 if (!no_daemon && poll_interval < 0 && !debug_mode) {
231 fprintf(stderr, "OOB mode is enabled and will run as daemon\n");
232 daemonize((char *) "/tmp/",
233 (char *)"/tmp/hfi-events.pid");
235 signal(SIGINT, signal_handler);
240 if (poll_interval < 0) {
243 fprintf(stderr, "HFI initialization failed\n");
245 fprintf(stderr, "Must specify poll-interval\n");
249 debug_printf("Starting loop\n");
251 sleep(poll_interval);
252 poll_for_config_change();