1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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/param.h>
30 #include <sys/eventhandler.h>
31 #include <sys/power.h>
32 #include <sys/proc.h>
33 #include <sys/systm.h>
34 #include <sys/taskqueue.h>
35
36 static u_int power_pm_type = POWER_PM_TYPE_NONE;
37 static power_pm_fn_t power_pm_fn = NULL;
38 static void *power_pm_arg = NULL;
39 static struct task power_pm_task;
40
41 static void
power_pm_deferred_fn(void * arg,int pending)42 power_pm_deferred_fn(void *arg, int pending)
43 {
44 int state = (intptr_t)arg;
45
46 power_pm_fn(POWER_CMD_SUSPEND, power_pm_arg, state);
47 }
48
49 int
power_pm_register(u_int pm_type,power_pm_fn_t pm_fn,void * pm_arg)50 power_pm_register(u_int pm_type, power_pm_fn_t pm_fn, void *pm_arg)
51 {
52 int error;
53
54 if (power_pm_type == POWER_PM_TYPE_NONE ||
55 power_pm_type == pm_type) {
56 power_pm_type = pm_type;
57 power_pm_fn = pm_fn;
58 power_pm_arg = pm_arg;
59 error = 0;
60 TASK_INIT(&power_pm_task, 0, power_pm_deferred_fn, NULL);
61 } else {
62 error = ENXIO;
63 }
64
65 return (error);
66 }
67
68 u_int
power_pm_get_type(void)69 power_pm_get_type(void)
70 {
71
72 return (power_pm_type);
73 }
74
75 void
power_pm_suspend(int state)76 power_pm_suspend(int state)
77 {
78 if (power_pm_fn == NULL)
79 return;
80
81 if (state != POWER_SLEEP_STATE_STANDBY &&
82 state != POWER_SLEEP_STATE_SUSPEND &&
83 state != POWER_SLEEP_STATE_HIBERNATE)
84 return;
85 power_pm_task.ta_context = (void *)(intptr_t)state;
86 taskqueue_enqueue(taskqueue_thread, &power_pm_task);
87 }
88
89 /*
90 * Power profile.
91 */
92
93 static int power_profile_state = POWER_PROFILE_PERFORMANCE;
94
95 int
power_profile_get_state(void)96 power_profile_get_state(void)
97 {
98 return (power_profile_state);
99 }
100
101 void
power_profile_set_state(int state)102 power_profile_set_state(int state)
103 {
104 int changed;
105
106 if (state != power_profile_state) {
107 power_profile_state = state;
108 changed = 1;
109 if (bootverbose) {
110 printf("system power profile changed to '%s'\n",
111 (state == POWER_PROFILE_PERFORMANCE) ?
112 "performance" : "economy");
113 }
114 } else {
115 changed = 0;
116 }
117
118 if (changed)
119 EVENTHANDLER_INVOKE(power_profile_change, 0);
120 }
121