1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 Mitsuru IWASAKI 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/proc.h> 35 36 #include <sys/power.h> 37 #include <sys/taskqueue.h> 38 39 static u_int power_pm_type = POWER_PM_TYPE_NONE; 40 static power_pm_fn_t power_pm_fn = NULL; 41 static void *power_pm_arg = NULL; 42 static struct task power_pm_task; 43 44 static void 45 power_pm_deferred_fn(void *arg, int pending) 46 { 47 int state = (intptr_t)arg; 48 49 power_pm_fn(POWER_CMD_SUSPEND, power_pm_arg, state); 50 } 51 52 int 53 power_pm_register(u_int pm_type, power_pm_fn_t pm_fn, void *pm_arg) 54 { 55 int error; 56 57 if (power_pm_type == POWER_PM_TYPE_NONE || 58 power_pm_type == pm_type) { 59 power_pm_type = pm_type; 60 power_pm_fn = pm_fn; 61 power_pm_arg = pm_arg; 62 error = 0; 63 TASK_INIT(&power_pm_task, 0, power_pm_deferred_fn, NULL); 64 } else { 65 error = ENXIO; 66 } 67 68 return (error); 69 } 70 71 u_int 72 power_pm_get_type(void) 73 { 74 75 return (power_pm_type); 76 } 77 78 void 79 power_pm_suspend(int state) 80 { 81 if (power_pm_fn == NULL) 82 return; 83 84 if (state != POWER_SLEEP_STATE_STANDBY && 85 state != POWER_SLEEP_STATE_SUSPEND && 86 state != POWER_SLEEP_STATE_HIBERNATE) 87 return; 88 power_pm_task.ta_context = (void *)(intptr_t)state; 89 taskqueue_enqueue(taskqueue_thread, &power_pm_task); 90 } 91 92 /* 93 * Power profile. 94 */ 95 96 static int power_profile_state = POWER_PROFILE_PERFORMANCE; 97 98 int 99 power_profile_get_state(void) 100 { 101 return (power_profile_state); 102 } 103 104 void 105 power_profile_set_state(int state) 106 { 107 int changed; 108 109 if (state != power_profile_state) { 110 power_profile_state = state; 111 changed = 1; 112 if (bootverbose) { 113 printf("system power profile changed to '%s'\n", 114 (state == POWER_PROFILE_PERFORMANCE) ? 115 "performance" : "economy"); 116 } 117 } else { 118 changed = 0; 119 } 120 121 if (changed) 122 EVENTHANDLER_INVOKE(power_profile_change, 0); 123 } 124 125