^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * kernel/power/suspend.c - Suspend to RAM and standby functionality.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2003 Patrick Mochel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2003 Open Source Development Lab
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (c) 2009 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define pr_fmt(fmt) "PM: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/cpuidle.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/gfp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/suspend.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/syscore_ops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/swait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/ftrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <trace/events/power.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/wakeup_reason.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include "power.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) const char * const pm_labels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) [PM_SUSPEND_TO_IDLE] = "freeze",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) [PM_SUSPEND_STANDBY] = "standby",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) [PM_SUSPEND_MEM] = "mem",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) const char *pm_states[PM_SUSPEND_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static const char * const mem_sleep_labels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) [PM_SUSPEND_TO_IDLE] = "s2idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) [PM_SUSPEND_STANDBY] = "shallow",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) [PM_SUSPEND_MEM] = "deep",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) const char *mem_sleep_states[PM_SUSPEND_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) suspend_state_t mem_sleep_current = PM_SUSPEND_TO_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) suspend_state_t mem_sleep_default = PM_SUSPEND_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) suspend_state_t pm_suspend_target_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) EXPORT_SYMBOL_GPL(pm_suspend_target_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) unsigned int pm_suspend_global_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) EXPORT_SYMBOL_GPL(pm_suspend_global_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static const struct platform_suspend_ops *suspend_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static const struct platform_s2idle_ops *s2idle_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static DECLARE_SWAIT_QUEUE_HEAD(s2idle_wait_head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) enum s2idle_states __read_mostly s2idle_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static DEFINE_RAW_SPINLOCK(s2idle_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * pm_suspend_default_s2idle - Check if suspend-to-idle is the default suspend.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * Return 'true' if suspend-to-idle has been selected as the default system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * suspend method.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) bool pm_suspend_default_s2idle(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return mem_sleep_current == PM_SUSPEND_TO_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) EXPORT_SYMBOL_GPL(pm_suspend_default_s2idle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) void s2idle_set_ops(const struct platform_s2idle_ops *ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) lock_system_sleep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) s2idle_ops = ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) unlock_system_sleep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static void s2idle_begin(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) s2idle_state = S2IDLE_STATE_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static void s2idle_enter(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) trace_suspend_resume(TPS("machine_suspend"), PM_SUSPEND_TO_IDLE, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) raw_spin_lock_irq(&s2idle_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (pm_wakeup_pending())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) s2idle_state = S2IDLE_STATE_ENTER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) raw_spin_unlock_irq(&s2idle_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) get_online_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) cpuidle_resume();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /* Push all the CPUs into the idle loop. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) wake_up_all_idle_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* Make the current CPU wait so it can enter the idle loop too. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) swait_event_exclusive(s2idle_wait_head,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) s2idle_state == S2IDLE_STATE_WAKE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) cpuidle_pause();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) put_online_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) raw_spin_lock_irq(&s2idle_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) s2idle_state = S2IDLE_STATE_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) raw_spin_unlock_irq(&s2idle_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) trace_suspend_resume(TPS("machine_suspend"), PM_SUSPEND_TO_IDLE, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static void s2idle_loop(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) pm_pr_dbg("suspend-to-idle\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * Suspend-to-idle equals:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * frozen processes + suspended devices + idle processors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * Thus s2idle_enter() should be called right after all devices have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * been suspended.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) * Wakeups during the noirq suspend of devices may be spurious, so try
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * to avoid them upfront.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (s2idle_ops && s2idle_ops->wake) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (s2idle_ops->wake())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) } else if (pm_wakeup_pending()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) clear_wakeup_reasons();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) s2idle_enter();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) pm_pr_dbg("resume from suspend-to-idle\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) void s2idle_wake(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) raw_spin_lock_irqsave(&s2idle_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (s2idle_state > S2IDLE_STATE_NONE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) s2idle_state = S2IDLE_STATE_WAKE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) swake_up_one(&s2idle_wait_head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) raw_spin_unlock_irqrestore(&s2idle_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) EXPORT_SYMBOL_GPL(s2idle_wake);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static bool valid_state(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * PM_SUSPEND_STANDBY and PM_SUSPEND_MEM states need low level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * support and need to be valid to the low level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * implementation, no valid callback implies that none are valid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return suspend_ops && suspend_ops->valid && suspend_ops->valid(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) void __init pm_states_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* "mem" and "freeze" are always present in /sys/power/state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) pm_states[PM_SUSPEND_MEM] = pm_labels[PM_SUSPEND_MEM];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) pm_states[PM_SUSPEND_TO_IDLE] = pm_labels[PM_SUSPEND_TO_IDLE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * Suspend-to-idle should be supported even without any suspend_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * initialize mem_sleep_states[] accordingly here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) mem_sleep_states[PM_SUSPEND_TO_IDLE] = mem_sleep_labels[PM_SUSPEND_TO_IDLE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static int __init mem_sleep_default_setup(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) suspend_state_t state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) for (state = PM_SUSPEND_TO_IDLE; state <= PM_SUSPEND_MEM; state++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (mem_sleep_labels[state] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) !strcmp(str, mem_sleep_labels[state])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) mem_sleep_default = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) __setup("mem_sleep_default=", mem_sleep_default_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * suspend_set_ops - Set the global suspend method table.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * @ops: Suspend operations to use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) void suspend_set_ops(const struct platform_suspend_ops *ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) lock_system_sleep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) suspend_ops = ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (valid_state(PM_SUSPEND_STANDBY)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) mem_sleep_states[PM_SUSPEND_STANDBY] = mem_sleep_labels[PM_SUSPEND_STANDBY];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) pm_states[PM_SUSPEND_STANDBY] = pm_labels[PM_SUSPEND_STANDBY];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (mem_sleep_default == PM_SUSPEND_STANDBY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) mem_sleep_current = PM_SUSPEND_STANDBY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) if (valid_state(PM_SUSPEND_MEM)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) mem_sleep_states[PM_SUSPEND_MEM] = mem_sleep_labels[PM_SUSPEND_MEM];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (mem_sleep_default >= PM_SUSPEND_MEM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) mem_sleep_current = PM_SUSPEND_MEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) unlock_system_sleep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) EXPORT_SYMBOL_GPL(suspend_set_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * suspend_valid_only_mem - Generic memory-only valid callback.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * Platform drivers that implement mem suspend only and only need to check for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * that in their .valid() callback can use this instead of rolling their own
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * .valid() callback.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) int suspend_valid_only_mem(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return state == PM_SUSPEND_MEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) EXPORT_SYMBOL_GPL(suspend_valid_only_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static bool sleep_state_supported(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return state == PM_SUSPEND_TO_IDLE || (suspend_ops && suspend_ops->enter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) static int platform_suspend_prepare(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return state != PM_SUSPEND_TO_IDLE && suspend_ops->prepare ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) suspend_ops->prepare() : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static int platform_suspend_prepare_late(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) return state == PM_SUSPEND_TO_IDLE && s2idle_ops && s2idle_ops->prepare ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) s2idle_ops->prepare() : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static int platform_suspend_prepare_noirq(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) if (state == PM_SUSPEND_TO_IDLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return s2idle_ops && s2idle_ops->prepare_late ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) s2idle_ops->prepare_late() : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return suspend_ops->prepare_late ? suspend_ops->prepare_late() : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) static void platform_resume_noirq(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (state == PM_SUSPEND_TO_IDLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (s2idle_ops && s2idle_ops->restore_early)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) s2idle_ops->restore_early();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) } else if (suspend_ops->wake) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) suspend_ops->wake();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) static void platform_resume_early(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (state == PM_SUSPEND_TO_IDLE && s2idle_ops && s2idle_ops->restore)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) s2idle_ops->restore();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) static void platform_resume_finish(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) if (state != PM_SUSPEND_TO_IDLE && suspend_ops->finish)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) suspend_ops->finish();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static int platform_suspend_begin(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (state == PM_SUSPEND_TO_IDLE && s2idle_ops && s2idle_ops->begin)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return s2idle_ops->begin();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) else if (suspend_ops && suspend_ops->begin)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) return suspend_ops->begin(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static void platform_resume_end(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (state == PM_SUSPEND_TO_IDLE && s2idle_ops && s2idle_ops->end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) s2idle_ops->end();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) else if (suspend_ops && suspend_ops->end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) suspend_ops->end();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static void platform_recover(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (state != PM_SUSPEND_TO_IDLE && suspend_ops->recover)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) suspend_ops->recover();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) static bool platform_suspend_again(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) return state != PM_SUSPEND_TO_IDLE && suspend_ops->suspend_again ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) suspend_ops->suspend_again() : false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) #ifdef CONFIG_PM_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) static unsigned int pm_test_delay = 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) module_param(pm_test_delay, uint, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) MODULE_PARM_DESC(pm_test_delay,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) "Number of seconds to wait before resuming from suspend test");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) static int suspend_test(int level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) #ifdef CONFIG_PM_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (pm_test_level == level) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) pr_info("suspend debug: Waiting for %d second(s).\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) pm_test_delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) mdelay(pm_test_delay * 1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) #endif /* !CONFIG_PM_DEBUG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * suspend_prepare - Prepare for entering system sleep state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) * Common code run for every system sleep state that can be entered (except for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) * hibernation). Run suspend notifiers, allocate the "suspend" console and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) * freeze processes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) static int suspend_prepare(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (!sleep_state_supported(state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) pm_prepare_console();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) error = pm_notifier_call_chain_robust(PM_SUSPEND_PREPARE, PM_POST_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) goto Restore;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) trace_suspend_resume(TPS("freeze_processes"), 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) error = suspend_freeze_processes();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) trace_suspend_resume(TPS("freeze_processes"), 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (!error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) log_suspend_abort_reason("One or more tasks refusing to freeze");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) suspend_stats.failed_freeze++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) dpm_save_failed_step(SUSPEND_FREEZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) pm_notifier_call_chain(PM_POST_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) Restore:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) pm_restore_console();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) /* default implementation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) void __weak arch_suspend_disable_irqs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) /* default implementation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) void __weak arch_suspend_enable_irqs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) * suspend_enter - Make the system enter the given sleep state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) * @state: System sleep state to enter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) * @wakeup: Returns information that the sleep state should not be re-entered.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) * This function should be called after devices have been suspended.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static int suspend_enter(suspend_state_t state, bool *wakeup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) int error, last_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) error = platform_suspend_prepare(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) goto Platform_finish;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) error = dpm_suspend_late(PMSG_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) last_dev = suspend_stats.last_failed_dev + REC_FAILED_NUM - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) last_dev %= REC_FAILED_NUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) pr_err("late suspend of devices failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) log_suspend_abort_reason("late suspend of %s device failed",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) suspend_stats.failed_devs[last_dev]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) goto Platform_finish;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) error = platform_suspend_prepare_late(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) goto Devices_early_resume;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) error = dpm_suspend_noirq(PMSG_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) last_dev = suspend_stats.last_failed_dev + REC_FAILED_NUM - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) last_dev %= REC_FAILED_NUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) pr_err("noirq suspend of devices failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) log_suspend_abort_reason("noirq suspend of %s device failed",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) suspend_stats.failed_devs[last_dev]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) goto Platform_early_resume;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) error = platform_suspend_prepare_noirq(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) goto Platform_wake;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) if (suspend_test(TEST_PLATFORM))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) goto Platform_wake;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (state == PM_SUSPEND_TO_IDLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) s2idle_loop();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) goto Platform_wake;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) error = suspend_disable_secondary_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (error || suspend_test(TEST_CPUS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) log_suspend_abort_reason("Disabling non-boot cpus failed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) goto Enable_cpus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) arch_suspend_disable_irqs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) BUG_ON(!irqs_disabled());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) system_state = SYSTEM_SUSPEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) error = syscore_suspend();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) if (!error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) *wakeup = pm_wakeup_pending();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (!(suspend_test(TEST_CORE) || *wakeup)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) trace_suspend_resume(TPS("machine_suspend"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) state, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) error = suspend_ops->enter(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) trace_suspend_resume(TPS("machine_suspend"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) state, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) } else if (*wakeup) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) error = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) syscore_resume();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) system_state = SYSTEM_RUNNING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) arch_suspend_enable_irqs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) BUG_ON(irqs_disabled());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) Enable_cpus:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) suspend_enable_secondary_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) Platform_wake:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) platform_resume_noirq(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) dpm_resume_noirq(PMSG_RESUME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) Platform_early_resume:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) platform_resume_early(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) Devices_early_resume:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) dpm_resume_early(PMSG_RESUME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) Platform_finish:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) platform_resume_finish(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) * suspend_devices_and_enter - Suspend devices and enter system sleep state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) * @state: System sleep state to enter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) int suspend_devices_and_enter(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) bool wakeup = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) if (!sleep_state_supported(state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) pm_suspend_target_state = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (state == PM_SUSPEND_TO_IDLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) pm_set_suspend_no_platform();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) error = platform_suspend_begin(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) goto Close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) suspend_console();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) suspend_test_start();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) error = dpm_suspend_start(PMSG_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) pr_err("Some devices failed to suspend, or early wake event detected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) log_suspend_abort_reason(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) "Some devices failed to suspend, or early wake event detected");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) goto Recover_platform;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) suspend_test_finish("suspend devices");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (suspend_test(TEST_DEVICES))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) goto Recover_platform;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) error = suspend_enter(state, &wakeup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) } while (!error && !wakeup && platform_suspend_again(state));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) Resume_devices:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) suspend_test_start();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) dpm_resume_end(PMSG_RESUME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) suspend_test_finish("resume devices");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) trace_suspend_resume(TPS("resume_console"), state, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) resume_console();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) trace_suspend_resume(TPS("resume_console"), state, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) Close:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) platform_resume_end(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) pm_suspend_target_state = PM_SUSPEND_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) Recover_platform:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) platform_recover(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) goto Resume_devices;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) * suspend_finish - Clean up before finishing the suspend sequence.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) * Call platform code to clean up, restart processes, and free the console that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) * we've allocated. This routine is not called for hibernation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) static void suspend_finish(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) suspend_thaw_processes();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) pm_notifier_call_chain(PM_POST_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) pm_restore_console();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) * enter_state - Do common work needed to enter system sleep state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) * @state: System sleep state to enter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) * Make sure that no one else is trying to put the system into a sleep state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) * Fail if that's not the case. Otherwise, prepare for system suspend, make the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) * system enter the given sleep state and clean up after wakeup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) static int enter_state(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) trace_suspend_resume(TPS("suspend_enter"), state, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) if (state == PM_SUSPEND_TO_IDLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) #ifdef CONFIG_PM_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (pm_test_level != TEST_NONE && pm_test_level <= TEST_CPUS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) pr_warn("Unsupported test mode for suspend to idle, please choose none/freezer/devices/platform.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) } else if (!valid_state(state)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) if (!mutex_trylock(&system_transition_mutex))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) if (state == PM_SUSPEND_TO_IDLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) s2idle_begin();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) if (sync_on_suspend_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) trace_suspend_resume(TPS("sync_filesystems"), 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) ksys_sync_helper();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) trace_suspend_resume(TPS("sync_filesystems"), 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) pm_pr_dbg("Preparing system for sleep (%s)\n", mem_sleep_labels[state]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) pm_suspend_clear_flags();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) error = suspend_prepare(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) goto Unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) if (suspend_test(TEST_FREEZER))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) goto Finish;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) trace_suspend_resume(TPS("suspend_enter"), state, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) pm_pr_dbg("Suspending system (%s)\n", mem_sleep_labels[state]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) pm_restrict_gfp_mask();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) error = suspend_devices_and_enter(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) pm_restore_gfp_mask();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) Finish:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) events_check_enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) pm_pr_dbg("Finishing wakeup.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) suspend_finish();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) Unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) mutex_unlock(&system_transition_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) * pm_suspend - Externally visible function for suspending the system.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) * @state: System sleep state to enter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) * Check if the value of @state represents one of the supported states,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) * execute enter_state() and update system suspend statistics.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) int pm_suspend(suspend_state_t state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) if (state <= PM_SUSPEND_ON || state >= PM_SUSPEND_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) pr_info("suspend entry (%s)\n", mem_sleep_labels[state]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) error = enter_state(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) suspend_stats.fail++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) dpm_save_failed_errno(error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) suspend_stats.success++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) pr_info("suspend exit\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) EXPORT_SYMBOL(pm_suspend);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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