diff options
Diffstat (limited to 'drivers/acpi/sleep.c')
| -rw-r--r-- | drivers/acpi/sleep.c | 593 |
1 files changed, 452 insertions, 141 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 187ab61889e6..66ec81e306d4 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * sleep.c - ACPI sleep support. * @@ -5,44 +6,44 @@ * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com> * Copyright (c) 2000-2003 Patrick Mochel * Copyright (c) 2003 Open Source Development Lab - * - * This file is released under the GPLv2. - * */ +#define pr_fmt(fmt) "ACPI: PM: " fmt + #include <linux/delay.h> #include <linux/irq.h> #include <linux/dmi.h> #include <linux/device.h> +#include <linux/interrupt.h> #include <linux/suspend.h> #include <linux/reboot.h> #include <linux/acpi.h> #include <linux/module.h> - +#include <linux/syscore_ops.h> #include <asm/io.h> - -#include <acpi/acpi_bus.h> -#include <acpi/acpi_drivers.h> +#include <trace/events/power.h> #include "internal.h" #include "sleep.h" +/* + * Some HW-full platforms do not have _S5, so they may need + * to leverage efi power off for a shutdown. + */ +bool acpi_no_s5; static u8 sleep_states[ACPI_S_STATE_COUNT]; static void acpi_sleep_tts_switch(u32 acpi_state) { - union acpi_object in_arg = { ACPI_TYPE_INTEGER }; - struct acpi_object_list arg_list = { 1, &in_arg }; - acpi_status status = AE_OK; + acpi_status status; - in_arg.integer.value = acpi_state; - status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL); + status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state); if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { /* * OS can't evaluate the _TTS object correctly. Some warning * message will be printed. But it won't break anything. */ - printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); + pr_notice("Failure in evaluating _TTS object\n"); } } @@ -59,25 +60,41 @@ static struct notifier_block tts_notifier = { .priority = 0, }; +#ifndef acpi_skip_set_wakeup_address +#define acpi_skip_set_wakeup_address() false +#endif + static int acpi_sleep_prepare(u32 acpi_state) { #ifdef CONFIG_ACPI_SLEEP + unsigned long acpi_wakeup_address; + /* do we have a wakeup address for S2 and S3? */ - if (acpi_state == ACPI_STATE_S3) { + if (acpi_state == ACPI_STATE_S3 && !acpi_skip_set_wakeup_address()) { + acpi_wakeup_address = acpi_get_wakeup_address(); if (!acpi_wakeup_address) return -EFAULT; - acpi_set_firmware_waking_vector(acpi_wakeup_address); + acpi_set_waking_vector(acpi_wakeup_address); } - ACPI_FLUSH_CPU_CACHE(); #endif - printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", - acpi_state); + pr_info("Preparing to enter system sleep state S%d\n", acpi_state); acpi_enable_wakeup_devices(acpi_state); acpi_enter_sleep_state_prep(acpi_state); return 0; } +bool acpi_sleep_state_supported(u8 sleep_state) +{ + acpi_status status; + u8 type_a, type_b; + + status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b); + return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware + || (acpi_gbl_FADT.sleep_control.address + && acpi_gbl_FADT.sleep_status.address)); +} + #ifdef CONFIG_ACPI_SLEEP static u32 acpi_target_sleep_state = ACPI_STATE_S0; @@ -85,6 +102,7 @@ u32 acpi_target_system_state(void) { return acpi_target_sleep_state; } +EXPORT_SYMBOL_GPL(acpi_target_system_state); static bool pwr_btn_event_pending; @@ -117,6 +135,12 @@ void __init acpi_nvs_nosave_s3(void) nvs_nosave_s3 = true; } +static int __init init_nvs_save_s3(const struct dmi_system_id *d) +{ + nvs_nosave_s3 = false; + return 0; +} + /* * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the * user to request that behavior by using the 'acpi_old_suspend_ordering' @@ -141,7 +165,15 @@ static int __init init_nvs_nosave(const struct dmi_system_id *d) return 0; } -static struct dmi_system_id __initdata acpisleep_dmi_table[] = { +bool acpi_sleep_default_s3; + +static int __init init_default_s3(const struct dmi_system_id *d) +{ + acpi_sleep_default_s3 = true; + return 0; +} + +static const struct dmi_system_id acpisleep_dmi_table[] __initconst = { { .callback = init_old_suspend_ordering, .ident = "Abit KN9 (nForce4 variant)", @@ -311,11 +343,80 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), }, }, + { + .callback = init_nvs_save_s3, + .ident = "Asus 1025C", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "1025C"), + }, + }, + /* + * The ASUS ROG M16 from 2023 has many events which wake it from s2idle + * resulting in excessive battery drain and risk of laptop overheating, + * these events can be caused by the MMC or y AniMe display if installed. + * The match is valid for all of the GU604V<x> range. + */ + { + .callback = init_default_s3, + .ident = "ASUS ROG Zephyrus M16 (2023)", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "ROG Zephyrus M16 GU604V"), + }, + }, + /* + * https://bugzilla.kernel.org/show_bug.cgi?id=189431 + * Lenovo G50-45 is a platform later than 2012, but needs nvs memory + * saving during S3. + */ + { + .callback = init_nvs_save_s3, + .ident = "Lenovo G50-45", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "80E3"), + }, + }, + { + .callback = init_nvs_save_s3, + .ident = "Lenovo G40-45", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "80E1"), + }, + }, + /* + * ThinkPad X1 Tablet(2016) cannot do suspend-to-idle using + * the Low Power S0 Idle firmware interface (see + * https://bugzilla.kernel.org/show_bug.cgi?id=199057). + */ + { + .callback = init_default_s3, + .ident = "ThinkPad X1 Tablet(2016)", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "20GGA00L00"), + }, + }, {}, }; -static void acpi_sleep_dmi_check(void) +static bool ignore_blacklist; + +void __init acpi_sleep_no_blacklist(void) +{ + ignore_blacklist = true; +} + +static void __init acpi_sleep_dmi_check(void) { + if (ignore_blacklist) + return; + + if (dmi_get_bios_year() >= 2012) + acpi_nvs_nosave_s3(); + dmi_check_system(acpisleep_dmi_table); } @@ -331,7 +432,7 @@ static int acpi_pm_freeze(void) } /** - * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. + * acpi_pm_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. */ static int acpi_pm_pre_suspend(void) { @@ -367,14 +468,6 @@ static int acpi_pm_prepare(void) return error; } -static int find_powerf_dev(struct device *dev, void *data) -{ - struct acpi_device *device = to_acpi_device(dev); - const char *hid = acpi_device_hid(device); - - return !strcmp(hid, ACPI_BUTTON_HID_POWERF); -} - /** * acpi_pm_finish - Instruct the platform to leave a sleep state. * @@ -383,7 +476,7 @@ static int find_powerf_dev(struct device *dev, void *data) */ static void acpi_pm_finish(void) { - struct device *pwr_btn_dev; + struct acpi_device *pwr_btn_adev; u32 acpi_state = acpi_target_sleep_state; acpi_ec_unblock_transactions(); @@ -392,13 +485,12 @@ static void acpi_pm_finish(void) if (acpi_state == ACPI_STATE_S0) return; - printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", - acpi_state); + pr_info("Waking up from system sleep state S%d\n", acpi_state); acpi_disable_wakeup_devices(acpi_state); acpi_leave_sleep_state(acpi_state); /* reset firmware waking vector */ - acpi_set_firmware_waking_vector((acpi_physical_address) 0); + acpi_set_waking_vector(0); acpi_target_sleep_state = ACPI_STATE_S0; @@ -414,19 +506,32 @@ static void acpi_pm_finish(void) return; pwr_btn_event_pending = false; - pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, - find_powerf_dev); - if (pwr_btn_dev) { - pm_wakeup_event(pwr_btn_dev, 0); - put_device(pwr_btn_dev); + pwr_btn_adev = acpi_dev_get_first_match_dev(ACPI_BUTTON_HID_POWERF, + NULL, -1); + if (pwr_btn_adev) { + pm_wakeup_event(&pwr_btn_adev->dev, 0); + acpi_dev_put(pwr_btn_adev); } } /** - * acpi_pm_end - Finish up suspend sequence. + * acpi_pm_start - Start system PM transition. + * @acpi_state: The target ACPI power state to transition to. + */ +static void acpi_pm_start(u32 acpi_state) +{ + acpi_target_sleep_state = acpi_state; + acpi_sleep_tts_switch(acpi_target_sleep_state); + acpi_scan_lock_acquire(); +} + +/** + * acpi_pm_end - Finish up system PM transition. */ static void acpi_pm_end(void) { + acpi_turn_off_unused_power_resources(); + acpi_scan_lock_release(); /* * This is necessary in case acpi_pm_finish() is not called during a * failing transition to a sleep state. @@ -435,7 +540,9 @@ static void acpi_pm_end(void) acpi_sleep_tts_switch(acpi_target_sleep_state); } #else /* !CONFIG_ACPI_SLEEP */ +#define sleep_no_lps0 (1) #define acpi_target_sleep_state ACPI_STATE_S0 +#define acpi_sleep_default_s3 (1) static inline void acpi_sleep_dmi_check(void) {} #endif /* CONFIG_ACPI_SLEEP */ @@ -448,27 +555,28 @@ static u32 acpi_suspend_states[] = { }; /** - * acpi_suspend_begin - Set the target system sleep state to the state - * associated with given @pm_state, if supported. + * acpi_suspend_begin - Set the target system sleep state to the state + * associated with given @pm_state, if supported. + * @pm_state: The target system power management state. */ static int acpi_suspend_begin(suspend_state_t pm_state) { u32 acpi_state = acpi_suspend_states[pm_state]; - int error = 0; + int error; error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); if (error) return error; - if (sleep_states[acpi_state]) { - acpi_target_sleep_state = acpi_state; - acpi_sleep_tts_switch(acpi_target_sleep_state); - } else { - printk(KERN_ERR "ACPI does not support this state: %d\n", - pm_state); - error = -ENOSYS; + if (!sleep_states[acpi_state]) { + pr_err("ACPI does not support sleep state S%u\n", acpi_state); + return -ENOSYS; } - return error; + if (acpi_state > ACPI_STATE_S1) + pm_set_suspend_via_firmware(); + + acpi_pm_start(acpi_state); + return 0; } /** @@ -485,8 +593,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state) u32 acpi_state = acpi_target_sleep_state; int error; - ACPI_FLUSH_CPU_CACHE(); - + trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); switch (acpi_state) { case ACPI_STATE_S1: barrier(); @@ -499,9 +606,11 @@ static int acpi_suspend_enter(suspend_state_t pm_state) error = acpi_suspend_lowlevel(); if (error) return error; - pr_info(PREFIX "Low-level resume complete\n"); + pr_info("Low-level resume complete\n"); + pm_set_resume_via_firmware(); break; } + trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); /* This violates the spec but is required for bug compatibility. */ acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); @@ -519,11 +628,11 @@ static int acpi_suspend_enter(suspend_state_t pm_state) * generate wakeup events. */ if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { - acpi_event_status pwr_btn_status; + acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); - if (pwr_btn_status & ACPI_EVENT_FLAG_SET) { + if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) { acpi_clear_event(ACPI_EVENT_POWER_BUTTON); /* Flag for later */ pwr_btn_event_pending = true; @@ -531,13 +640,21 @@ static int acpi_suspend_enter(suspend_state_t pm_state) } /* - * Disable and clear GPE status before interrupt is enabled. Some GPEs - * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. - * acpi_leave_sleep_state will reenable specific GPEs later + * Disable all GPE and clear their status bits before interrupts are + * enabled. Some GPEs (like wakeup GPEs) have no handlers and this can + * prevent them from producing spurious interrupts. + * + * acpi_leave_sleep_state() will reenable specific GPEs later. + * + * Because this code runs on one CPU with disabled interrupts (all of + * the other CPUs are offline at this time), it need not acquire any + * sleeping locks which may trigger an implicit preemption point even + * if there is no contention, so avoid doing that by using a low-level + * library routine here. */ - acpi_disable_all_gpes(); + acpi_hw_disable_all_gpes(); /* Allow EC transactions to happen. */ - acpi_ec_unblock_transactions_early(); + acpi_ec_unblock_transactions(); suspend_nvs_restore(); @@ -570,10 +687,11 @@ static const struct platform_suspend_ops acpi_suspend_ops = { }; /** - * acpi_suspend_begin_old - Set the target system sleep state to the - * state associated with given @pm_state, if supported, and - * execute the _PTS control method. This function is used if the - * pre-ACPI 2.0 suspend ordering has been requested. + * acpi_suspend_begin_old - Set the target system sleep state to the + * state associated with given @pm_state, if supported, and + * execute the _PTS control method. This function is used if the + * pre-ACPI 2.0 suspend ordering has been requested. + * @pm_state: The target suspend state for the system. */ static int acpi_suspend_begin_old(suspend_state_t pm_state) { @@ -598,56 +716,232 @@ static const struct platform_suspend_ops acpi_suspend_ops_old = { .recover = acpi_pm_finish, }; -static void acpi_sleep_suspend_setup(void) +static bool s2idle_wakeup; + +int acpi_s2idle_begin(void) { - int i; + acpi_scan_lock_acquire(); + return 0; +} - for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { - acpi_status status; - u8 type_a, type_b; +int acpi_s2idle_prepare(void) +{ + if (acpi_sci_irq_valid()) { + int error; - status = acpi_get_sleep_type_data(i, &type_a, &type_b); - if (ACPI_SUCCESS(status)) { - sleep_states[i] = 1; + error = enable_irq_wake(acpi_sci_irq); + if (error) + pr_warn("Warning: Failed to enable wakeup from IRQ %d: %d\n", + acpi_sci_irq, error); + + acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE); + } + + acpi_enable_wakeup_devices(ACPI_STATE_S0); + + /* Change the configuration of GPEs to avoid spurious wakeup. */ + acpi_enable_all_wakeup_gpes(); + acpi_os_wait_events_complete(); + + s2idle_wakeup = true; + return 0; +} + +bool acpi_s2idle_wake(void) +{ + if (!acpi_sci_irq_valid()) + return pm_wakeup_pending(); + + while (pm_wakeup_pending()) { + /* + * If IRQD_WAKEUP_ARMED is set for the SCI at this point, the + * SCI has not triggered while suspended, so bail out (the + * wakeup is pending anyway and the SCI is not the source of + * it). + */ + if (irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) { + pm_pr_dbg("Wakeup unrelated to ACPI SCI\n"); + return true; + } + + /* + * If the status bit of any enabled fixed event is set, the + * wakeup is regarded as valid. + */ + if (acpi_any_fixed_event_status_set()) { + pm_pr_dbg("ACPI fixed event wakeup\n"); + return true; + } + + /* Check wakeups from drivers sharing the SCI. */ + if (acpi_check_wakeup_handlers()) { + pm_pr_dbg("ACPI custom handler wakeup\n"); + return true; } + + /* + * Check non-EC GPE wakeups and if there are none, cancel the + * SCI-related wakeup and dispatch the EC GPE. + */ + if (acpi_ec_dispatch_gpe()) { + pm_pr_dbg("ACPI non-EC GPE wakeup\n"); + return true; + } + + acpi_os_wait_events_complete(); + + /* + * The SCI is in the "suspended" state now and it cannot produce + * new wakeup events till the rearming below, so if any of them + * are pending here, they must be resulting from the processing + * of EC events above or coming from somewhere else. + */ + if (pm_wakeup_pending()) { + pm_pr_dbg("Wakeup after ACPI Notify sync\n"); + return true; + } + + pm_pr_dbg("Rearming ACPI SCI for wakeup\n"); + + pm_wakeup_clear(acpi_sci_irq); + rearm_wake_irq(acpi_sci_irq); } - suspend_set_ops(old_suspend_ordering ? - &acpi_suspend_ops_old : &acpi_suspend_ops); + return false; } + +void acpi_s2idle_restore(void) +{ + /* + * Drain pending events before restoring the working-state configuration + * of GPEs. + */ + acpi_os_wait_events_complete(); /* synchronize GPE processing */ + acpi_ec_flush_work(); /* flush the EC driver's workqueues */ + acpi_os_wait_events_complete(); /* synchronize Notify handling */ + + s2idle_wakeup = false; + + acpi_enable_all_runtime_gpes(); + + acpi_disable_wakeup_devices(ACPI_STATE_S0); + + if (acpi_sci_irq_valid()) { + acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE); + disable_irq_wake(acpi_sci_irq); + } +} + +void acpi_s2idle_end(void) +{ + acpi_scan_lock_release(); +} + +static const struct platform_s2idle_ops acpi_s2idle_ops = { + .begin = acpi_s2idle_begin, + .prepare = acpi_s2idle_prepare, + .wake = acpi_s2idle_wake, + .restore = acpi_s2idle_restore, + .end = acpi_s2idle_end, +}; + +void __weak acpi_s2idle_setup(void) +{ + if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) + pr_info("Efficient low-power S0 idle declared\n"); + + s2idle_set_ops(&acpi_s2idle_ops); +} + +static void __init acpi_sleep_suspend_setup(void) +{ + bool suspend_ops_needed = false; + int i; + + for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) + if (acpi_sleep_state_supported(i)) { + sleep_states[i] = 1; + suspend_ops_needed = true; + } + + if (suspend_ops_needed) + suspend_set_ops(old_suspend_ordering ? + &acpi_suspend_ops_old : &acpi_suspend_ops); + + acpi_s2idle_setup(); +} + #else /* !CONFIG_SUSPEND */ +#define s2idle_wakeup (false) static inline void acpi_sleep_suspend_setup(void) {} #endif /* !CONFIG_SUSPEND */ -#ifdef CONFIG_HIBERNATION -static unsigned long s4_hardware_signature; -static struct acpi_table_facs *facs; -static bool nosigcheck; +bool acpi_s2idle_wakeup(void) +{ + return s2idle_wakeup; +} + +#ifdef CONFIG_PM_SLEEP +static u32 saved_bm_rld; -void __init acpi_no_s4_hw_signature(void) +static int acpi_save_bm_rld(void *data) { - nosigcheck = true; + acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); + return 0; } -static int acpi_hibernation_begin(void) +static void acpi_restore_bm_rld(void *data) { - int error; + u32 resumed_bm_rld = 0; + + acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); + if (resumed_bm_rld == saved_bm_rld) + return; + + acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); +} - error = nvs_nosave ? 0 : suspend_nvs_alloc(); - if (!error) { - acpi_target_sleep_state = ACPI_STATE_S4; - acpi_sleep_tts_switch(acpi_target_sleep_state); +static const struct syscore_ops acpi_sleep_syscore_ops = { + .suspend = acpi_save_bm_rld, + .resume = acpi_restore_bm_rld, +}; + +static struct syscore acpi_sleep_syscore = { + .ops = &acpi_sleep_syscore_ops, +}; + +static void acpi_sleep_syscore_init(void) +{ + register_syscore(&acpi_sleep_syscore); +} +#else +static inline void acpi_sleep_syscore_init(void) {} +#endif /* CONFIG_PM_SLEEP */ + +#ifdef CONFIG_HIBERNATION +static unsigned long s4_hardware_signature; +static struct acpi_table_facs *facs; +int acpi_check_s4_hw_signature = -1; /* Default behaviour is just to warn */ + +static int acpi_hibernation_begin(pm_message_t stage) +{ + if (!nvs_nosave) { + int error = suspend_nvs_alloc(); + if (error) + return error; } - return error; + if (stage.event == PM_EVENT_HIBERNATE) + pm_set_suspend_via_firmware(); + + acpi_pm_start(ACPI_STATE_S4); + return 0; } static int acpi_hibernation_enter(void) { acpi_status status = AE_OK; - ACPI_FLUSH_CPU_CACHE(); - /* This shouldn't return. If it returns, we have a problem */ status = acpi_enter_sleep_state(ACPI_STATE_S4); /* Reprogram control registers */ @@ -658,6 +952,7 @@ static int acpi_hibernation_enter(void) static void acpi_hibernation_leave(void) { + pm_set_resume_via_firmware(); /* * If ACPI is not enabled by the BIOS and the boot kernel, we need to * enable it here. @@ -666,15 +961,12 @@ static void acpi_hibernation_leave(void) /* Reprogram control registers */ acpi_leave_sleep_state_prep(ACPI_STATE_S4); /* Check the hardware signature */ - if (facs && s4_hardware_signature != facs->hardware_signature) { - printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " - "cannot resume!\n"); - panic("ACPI S4 hardware signature mismatch"); - } + if (facs && s4_hardware_signature != facs->hardware_signature) + pr_crit("Hardware changed while hibernated, success doubtful!\n"); /* Restore the NVS memory area */ suspend_nvs_restore(); /* Allow EC transactions to happen. */ - acpi_ec_unblock_transactions_early(); + acpi_ec_unblock_transactions(); } static void acpi_pm_thaw(void) @@ -696,12 +988,13 @@ static const struct platform_hibernation_ops acpi_hibernation_ops = { }; /** - * acpi_hibernation_begin_old - Set the target system sleep state to - * ACPI_STATE_S4 and execute the _PTS control method. This - * function is used if the pre-ACPI 2.0 suspend ordering has been - * requested. + * acpi_hibernation_begin_old - Set the target system sleep state to + * ACPI_STATE_S4 and execute the _PTS control method. This + * function is used if the pre-ACPI 2.0 suspend ordering has been + * requested. + * @stage: The power management event message. */ -static int acpi_hibernation_begin_old(void) +static int acpi_hibernation_begin_old(pm_message_t stage) { int error; /* @@ -712,14 +1005,21 @@ static int acpi_hibernation_begin_old(void) acpi_sleep_tts_switch(ACPI_STATE_S4); error = acpi_sleep_prepare(ACPI_STATE_S4); + if (error) + return error; - if (!error) { - if (!nvs_nosave) - error = suspend_nvs_alloc(); - if (!error) - acpi_target_sleep_state = ACPI_STATE_S4; + if (!nvs_nosave) { + error = suspend_nvs_alloc(); + if (error) + return error; } - return error; + + if (stage.event == PM_EVENT_HIBERNATE) + pm_set_suspend_via_firmware(); + + acpi_target_sleep_state = ACPI_STATE_S4; + acpi_scan_lock_acquire(); + return 0; } /* @@ -741,80 +1041,91 @@ static const struct platform_hibernation_ops acpi_hibernation_ops_old = { static void acpi_sleep_hibernate_setup(void) { - acpi_status status; - u8 type_a, type_b; - - status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); - if (ACPI_FAILURE(status)) + if (!acpi_sleep_state_supported(ACPI_STATE_S4)) return; hibernation_set_ops(old_suspend_ordering ? &acpi_hibernation_ops_old : &acpi_hibernation_ops); sleep_states[ACPI_STATE_S4] = 1; - if (nosigcheck) + if (!acpi_check_s4_hw_signature) return; acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); - if (facs) + if (facs) { + /* + * s4_hardware_signature is the local variable which is just + * used to warn about mismatch after we're attempting to + * resume (in violation of the ACPI specification.) + */ s4_hardware_signature = facs->hardware_signature; + + if (acpi_check_s4_hw_signature > 0) { + /* + * If we're actually obeying the ACPI specification + * then the signature is written out as part of the + * swsusp header, in order to allow the boot kernel + * to gracefully decline to resume. + */ + swsusp_hardware_signature = facs->hardware_signature; + } + } } #else /* !CONFIG_HIBERNATION */ static inline void acpi_sleep_hibernate_setup(void) {} #endif /* !CONFIG_HIBERNATION */ -int acpi_suspend(u32 acpi_state) -{ - suspend_state_t states[] = { - [1] = PM_SUSPEND_STANDBY, - [3] = PM_SUSPEND_MEM, - [5] = PM_SUSPEND_MAX - }; - - if (acpi_state < 6 && states[acpi_state]) - return pm_suspend(states[acpi_state]); - if (acpi_state == 4) - return hibernate(); - return -EINVAL; -} - -static void acpi_power_off_prepare(void) +static int acpi_power_off_prepare(struct sys_off_data *data) { /* Prepare to power off the system */ acpi_sleep_prepare(ACPI_STATE_S5); acpi_disable_all_gpes(); + acpi_os_wait_events_complete(); + return NOTIFY_DONE; } -static void acpi_power_off(void) +static int acpi_power_off(struct sys_off_data *data) { /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ - printk(KERN_DEBUG "%s called\n", __func__); + pr_debug("%s called\n", __func__); local_irq_disable(); acpi_enter_sleep_state(ACPI_STATE_S5); + return NOTIFY_DONE; } int __init acpi_sleep_init(void) { - acpi_status status; - u8 type_a, type_b; char supported[ACPI_S_STATE_COUNT * 3 + 1]; char *pos = supported; int i; - if (acpi_disabled) - return 0; - acpi_sleep_dmi_check(); sleep_states[ACPI_STATE_S0] = 1; + acpi_sleep_syscore_init(); acpi_sleep_suspend_setup(); acpi_sleep_hibernate_setup(); - status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); - if (ACPI_SUCCESS(status)) { + if (acpi_sleep_state_supported(ACPI_STATE_S5)) { sleep_states[ACPI_STATE_S5] = 1; - pm_power_off_prepare = acpi_power_off_prepare; - pm_power_off = acpi_power_off; + + register_sys_off_handler(SYS_OFF_MODE_POWER_OFF_PREPARE, + SYS_OFF_PRIO_FIRMWARE, + acpi_power_off_prepare, NULL); + + register_sys_off_handler(SYS_OFF_MODE_POWER_OFF, + SYS_OFF_PRIO_FIRMWARE, + acpi_power_off, NULL); + + /* + * Windows uses S5 for reboot, so some BIOSes depend on it to + * perform proper reboot. + */ + register_sys_off_handler(SYS_OFF_MODE_RESTART_PREPARE, + SYS_OFF_PRIO_FIRMWARE, + acpi_power_off_prepare, NULL); + } else { + acpi_no_s5 = true; } supported[0] = 0; @@ -822,7 +1133,7 @@ int __init acpi_sleep_init(void) if (sleep_states[i]) pos += sprintf(pos, " S%d", i); } - pr_info(PREFIX "(supports%s)\n", supported); + pr_info("(supports%s)\n", supported); /* * Register the tts_notifier to reboot notifier list so that the _TTS |