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f1ffa9d4cc
Commit95722237cb
("ACPI: sleep: Put the FACS table after using it") puts the FACS table during initialization. But the hardware signature bits in the FACS table need to be accessed, after every hibernation, to compare with the original hardware signature. So there is no reason to release the FACS table mapping after initialization. This reverts commit95722237cb
. An alternative solution is to use acpi_gbl_FACS variable instead, which is mapped by the ACPICA core and never released. Link: https://bugzilla.kernel.org/show_bug.cgi?id=212277 Reported-by: Stephan Hohe <sth.dev@tejp.de> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Cc: 5.8+ <stable@vger.kernel.org> # 5.8+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1071 lines
26 KiB
C
1071 lines
26 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* sleep.c - ACPI sleep support.
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*
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* Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
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* Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com>
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* Copyright (c) 2000-2003 Patrick Mochel
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* Copyright (c) 2003 Open Source Development Lab
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*/
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/dmi.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/suspend.h>
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#include <linux/reboot.h>
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#include <linux/acpi.h>
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#include <linux/module.h>
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#include <linux/syscore_ops.h>
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#include <asm/io.h>
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#include <trace/events/power.h>
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#include "internal.h"
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#include "sleep.h"
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/*
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* Some HW-full platforms do not have _S5, so they may need
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* to leverage efi power off for a shutdown.
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*/
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bool acpi_no_s5;
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static u8 sleep_states[ACPI_S_STATE_COUNT];
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static void acpi_sleep_tts_switch(u32 acpi_state)
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{
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acpi_status status;
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status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state);
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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/*
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* OS can't evaluate the _TTS object correctly. Some warning
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* message will be printed. But it won't break anything.
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*/
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printk(KERN_NOTICE "Failure in evaluating _TTS object\n");
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}
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}
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static int tts_notify_reboot(struct notifier_block *this,
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unsigned long code, void *x)
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{
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acpi_sleep_tts_switch(ACPI_STATE_S5);
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return NOTIFY_DONE;
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}
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static struct notifier_block tts_notifier = {
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.notifier_call = tts_notify_reboot,
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.next = NULL,
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.priority = 0,
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};
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static int acpi_sleep_prepare(u32 acpi_state)
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{
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#ifdef CONFIG_ACPI_SLEEP
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unsigned long acpi_wakeup_address;
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/* do we have a wakeup address for S2 and S3? */
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if (acpi_state == ACPI_STATE_S3) {
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acpi_wakeup_address = acpi_get_wakeup_address();
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if (!acpi_wakeup_address)
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return -EFAULT;
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acpi_set_waking_vector(acpi_wakeup_address);
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}
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ACPI_FLUSH_CPU_CACHE();
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#endif
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printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
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acpi_state);
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acpi_enable_wakeup_devices(acpi_state);
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acpi_enter_sleep_state_prep(acpi_state);
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return 0;
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}
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bool acpi_sleep_state_supported(u8 sleep_state)
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{
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acpi_status status;
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u8 type_a, type_b;
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status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b);
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return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware
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|| (acpi_gbl_FADT.sleep_control.address
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&& acpi_gbl_FADT.sleep_status.address));
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}
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#ifdef CONFIG_ACPI_SLEEP
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static u32 acpi_target_sleep_state = ACPI_STATE_S0;
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u32 acpi_target_system_state(void)
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{
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return acpi_target_sleep_state;
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}
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EXPORT_SYMBOL_GPL(acpi_target_system_state);
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static bool pwr_btn_event_pending;
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/*
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* The ACPI specification wants us to save NVS memory regions during hibernation
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* and to restore them during the subsequent resume. Windows does that also for
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* suspend to RAM. However, it is known that this mechanism does not work on
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* all machines, so we allow the user to disable it with the help of the
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* 'acpi_sleep=nonvs' kernel command line option.
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*/
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static bool nvs_nosave;
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void __init acpi_nvs_nosave(void)
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{
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nvs_nosave = true;
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}
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/*
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* The ACPI specification wants us to save NVS memory regions during hibernation
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* but says nothing about saving NVS during S3. Not all versions of Windows
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* save NVS on S3 suspend either, and it is clear that not all systems need
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* NVS to be saved at S3 time. To improve suspend/resume time, allow the
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* user to disable saving NVS on S3 if their system does not require it, but
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* continue to save/restore NVS for S4 as specified.
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*/
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static bool nvs_nosave_s3;
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void __init acpi_nvs_nosave_s3(void)
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{
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nvs_nosave_s3 = true;
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}
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static int __init init_nvs_save_s3(const struct dmi_system_id *d)
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{
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nvs_nosave_s3 = false;
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return 0;
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}
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/*
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* ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the
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* user to request that behavior by using the 'acpi_old_suspend_ordering'
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* kernel command line option that causes the following variable to be set.
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*/
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static bool old_suspend_ordering;
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void __init acpi_old_suspend_ordering(void)
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{
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old_suspend_ordering = true;
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}
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static int __init init_old_suspend_ordering(const struct dmi_system_id *d)
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{
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acpi_old_suspend_ordering();
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return 0;
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}
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static int __init init_nvs_nosave(const struct dmi_system_id *d)
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{
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acpi_nvs_nosave();
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return 0;
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}
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bool acpi_sleep_default_s3;
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static int __init init_default_s3(const struct dmi_system_id *d)
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{
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acpi_sleep_default_s3 = true;
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return 0;
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}
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static const struct dmi_system_id acpisleep_dmi_table[] __initconst = {
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{
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.callback = init_old_suspend_ordering,
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.ident = "Abit KN9 (nForce4 variant)",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"),
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DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"),
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},
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},
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{
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.callback = init_old_suspend_ordering,
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.ident = "HP xw4600 Workstation",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"),
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},
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},
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{
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.callback = init_old_suspend_ordering,
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.ident = "Asus Pundit P1-AH2 (M2N8L motherboard)",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."),
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DMI_MATCH(DMI_BOARD_NAME, "M2N8L"),
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},
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},
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{
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.callback = init_old_suspend_ordering,
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.ident = "Panasonic CF51-2L",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR,
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"Matsushita Electric Industrial Co.,Ltd."),
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DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-FW41E_H",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-FW21E",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-FW21M",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VPCEB17FX",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-SR11M",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Everex StepNote Series",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VPCEB1Z1E",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-NW130D",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VPCCW29FX",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Averatec AV1020-ED2",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"),
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DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"),
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},
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},
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{
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.callback = init_old_suspend_ordering,
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.ident = "Asus A8N-SLI DELUXE",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
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DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"),
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},
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},
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{
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.callback = init_old_suspend_ordering,
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.ident = "Asus A8N-SLI Premium",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
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DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-SR26GN_P",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VPCEB1S1E",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Sony Vaio VGN-FW520F",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Asus K54C",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "K54C"),
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},
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},
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{
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.callback = init_nvs_nosave,
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.ident = "Asus K54HR",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"),
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},
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},
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{
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.callback = init_nvs_save_s3,
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.ident = "Asus 1025C",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
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DMI_MATCH(DMI_PRODUCT_NAME, "1025C"),
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},
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},
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/*
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* https://bugzilla.kernel.org/show_bug.cgi?id=189431
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* Lenovo G50-45 is a platform later than 2012, but needs nvs memory
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* saving during S3.
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*/
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{
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.callback = init_nvs_save_s3,
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.ident = "Lenovo G50-45",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_NAME, "80E3"),
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},
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},
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/*
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* ThinkPad X1 Tablet(2016) cannot do suspend-to-idle using
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* the Low Power S0 Idle firmware interface (see
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* https://bugzilla.kernel.org/show_bug.cgi?id=199057).
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*/
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{
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.callback = init_default_s3,
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.ident = "ThinkPad X1 Tablet(2016)",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_PRODUCT_NAME, "20GGA00L00"),
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},
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},
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{},
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};
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static bool ignore_blacklist;
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void __init acpi_sleep_no_blacklist(void)
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{
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ignore_blacklist = true;
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}
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static void __init acpi_sleep_dmi_check(void)
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{
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if (ignore_blacklist)
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return;
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if (dmi_get_bios_year() >= 2012)
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acpi_nvs_nosave_s3();
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dmi_check_system(acpisleep_dmi_table);
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}
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/**
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* acpi_pm_freeze - Disable the GPEs and suspend EC transactions.
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*/
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static int acpi_pm_freeze(void)
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{
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acpi_disable_all_gpes();
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acpi_os_wait_events_complete();
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acpi_ec_block_transactions();
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return 0;
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}
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/**
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* acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS.
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*/
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static int acpi_pm_pre_suspend(void)
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{
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acpi_pm_freeze();
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return suspend_nvs_save();
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}
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/**
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* __acpi_pm_prepare - Prepare the platform to enter the target state.
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*
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* If necessary, set the firmware waking vector and do arch-specific
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* nastiness to get the wakeup code to the waking vector.
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*/
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static int __acpi_pm_prepare(void)
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{
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int error = acpi_sleep_prepare(acpi_target_sleep_state);
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if (error)
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acpi_target_sleep_state = ACPI_STATE_S0;
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return error;
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}
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/**
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* acpi_pm_prepare - Prepare the platform to enter the target sleep
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* state and disable the GPEs.
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*/
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static int acpi_pm_prepare(void)
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{
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int error = __acpi_pm_prepare();
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if (!error)
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error = acpi_pm_pre_suspend();
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return error;
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}
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/**
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* acpi_pm_finish - Instruct the platform to leave a sleep state.
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*
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* This is called after we wake back up (or if entering the sleep state
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* failed).
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*/
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static void acpi_pm_finish(void)
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{
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struct acpi_device *pwr_btn_adev;
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u32 acpi_state = acpi_target_sleep_state;
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acpi_ec_unblock_transactions();
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suspend_nvs_free();
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if (acpi_state == ACPI_STATE_S0)
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return;
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printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n",
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acpi_state);
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acpi_disable_wakeup_devices(acpi_state);
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acpi_leave_sleep_state(acpi_state);
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/* reset firmware waking vector */
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acpi_set_waking_vector(0);
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acpi_target_sleep_state = ACPI_STATE_S0;
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acpi_resume_power_resources();
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/* If we were woken with the fixed power button, provide a small
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* hint to userspace in the form of a wakeup event on the fixed power
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* button device (if it can be found).
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*
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* We delay the event generation til now, as the PM layer requires
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* timekeeping to be running before we generate events. */
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if (!pwr_btn_event_pending)
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return;
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pwr_btn_event_pending = false;
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pwr_btn_adev = acpi_dev_get_first_match_dev(ACPI_BUTTON_HID_POWERF,
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NULL, -1);
|
|
if (pwr_btn_adev) {
|
|
pm_wakeup_event(&pwr_btn_adev->dev, 0);
|
|
acpi_dev_put(pwr_btn_adev);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* acpi_pm_start - Start system PM transition.
|
|
*/
|
|
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(false);
|
|
acpi_scan_lock_release();
|
|
/*
|
|
* This is necessary in case acpi_pm_finish() is not called during a
|
|
* failing transition to a sleep state.
|
|
*/
|
|
acpi_target_sleep_state = ACPI_STATE_S0;
|
|
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 */
|
|
|
|
#ifdef CONFIG_SUSPEND
|
|
static u32 acpi_suspend_states[] = {
|
|
[PM_SUSPEND_ON] = ACPI_STATE_S0,
|
|
[PM_SUSPEND_STANDBY] = ACPI_STATE_S1,
|
|
[PM_SUSPEND_MEM] = ACPI_STATE_S3,
|
|
[PM_SUSPEND_MAX] = ACPI_STATE_S5
|
|
};
|
|
|
|
/**
|
|
* acpi_suspend_begin - Set the target system sleep state to the state
|
|
* associated with given @pm_state, if supported.
|
|
*/
|
|
static int acpi_suspend_begin(suspend_state_t pm_state)
|
|
{
|
|
u32 acpi_state = acpi_suspend_states[pm_state];
|
|
int error;
|
|
|
|
error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc();
|
|
if (error)
|
|
return error;
|
|
|
|
if (!sleep_states[acpi_state]) {
|
|
pr_err("ACPI does not support sleep state S%u\n", acpi_state);
|
|
return -ENOSYS;
|
|
}
|
|
if (acpi_state > ACPI_STATE_S1)
|
|
pm_set_suspend_via_firmware();
|
|
|
|
acpi_pm_start(acpi_state);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* acpi_suspend_enter - Actually enter a sleep state.
|
|
* @pm_state: ignored
|
|
*
|
|
* Flush caches and go to sleep. For STR we have to call arch-specific
|
|
* assembly, which in turn call acpi_enter_sleep_state().
|
|
* It's unfortunate, but it works. Please fix if you're feeling frisky.
|
|
*/
|
|
static int acpi_suspend_enter(suspend_state_t pm_state)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
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();
|
|
status = acpi_enter_sleep_state(acpi_state);
|
|
break;
|
|
|
|
case ACPI_STATE_S3:
|
|
if (!acpi_suspend_lowlevel)
|
|
return -ENOSYS;
|
|
error = acpi_suspend_lowlevel();
|
|
if (error)
|
|
return error;
|
|
pr_info(PREFIX "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);
|
|
|
|
/* Reprogram control registers */
|
|
acpi_leave_sleep_state_prep(acpi_state);
|
|
|
|
/* ACPI 3.0 specs (P62) says that it's the responsibility
|
|
* of the OSPM to clear the status bit [ implying that the
|
|
* POWER_BUTTON event should not reach userspace ]
|
|
*
|
|
* However, we do generate a small hint for userspace in the form of
|
|
* a wakeup event. We flag this condition for now and generate the
|
|
* event later, as we're currently too early in resume to be able to
|
|
* generate wakeup events.
|
|
*/
|
|
if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) {
|
|
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_STATUS_SET) {
|
|
acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
|
|
/* Flag for later */
|
|
pwr_btn_event_pending = true;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
acpi_disable_all_gpes();
|
|
/* Allow EC transactions to happen. */
|
|
acpi_ec_unblock_transactions();
|
|
|
|
suspend_nvs_restore();
|
|
|
|
return ACPI_SUCCESS(status) ? 0 : -EFAULT;
|
|
}
|
|
|
|
static int acpi_suspend_state_valid(suspend_state_t pm_state)
|
|
{
|
|
u32 acpi_state;
|
|
|
|
switch (pm_state) {
|
|
case PM_SUSPEND_ON:
|
|
case PM_SUSPEND_STANDBY:
|
|
case PM_SUSPEND_MEM:
|
|
acpi_state = acpi_suspend_states[pm_state];
|
|
|
|
return sleep_states[acpi_state];
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static const struct platform_suspend_ops acpi_suspend_ops = {
|
|
.valid = acpi_suspend_state_valid,
|
|
.begin = acpi_suspend_begin,
|
|
.prepare_late = acpi_pm_prepare,
|
|
.enter = acpi_suspend_enter,
|
|
.wake = acpi_pm_finish,
|
|
.end = acpi_pm_end,
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
static int acpi_suspend_begin_old(suspend_state_t pm_state)
|
|
{
|
|
int error = acpi_suspend_begin(pm_state);
|
|
if (!error)
|
|
error = __acpi_pm_prepare();
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
|
|
* been requested.
|
|
*/
|
|
static const struct platform_suspend_ops acpi_suspend_ops_old = {
|
|
.valid = acpi_suspend_state_valid,
|
|
.begin = acpi_suspend_begin_old,
|
|
.prepare_late = acpi_pm_pre_suspend,
|
|
.enter = acpi_suspend_enter,
|
|
.wake = acpi_pm_finish,
|
|
.end = acpi_pm_end,
|
|
.recover = acpi_pm_finish,
|
|
};
|
|
|
|
static bool s2idle_wakeup;
|
|
|
|
int acpi_s2idle_begin(void)
|
|
{
|
|
acpi_scan_lock_acquire();
|
|
return 0;
|
|
}
|
|
|
|
int acpi_s2idle_prepare(void)
|
|
{
|
|
if (acpi_sci_irq_valid()) {
|
|
enable_irq_wake(acpi_sci_irq);
|
|
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 dispatch the EC GPE. */
|
|
if (acpi_ec_dispatch_gpe()) {
|
|
pm_pr_dbg("ACPI non-EC GPE wakeup\n");
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Cancel the SCI wakeup and process all pending events in case
|
|
* there are any wakeup ones in there.
|
|
*
|
|
* Note that if any non-EC GPEs are active at this point, the
|
|
* SCI will retrigger after the rearming below, so no events
|
|
* should be missed by canceling the wakeup here.
|
|
*/
|
|
pm_system_cancel_wakeup();
|
|
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;
|
|
}
|
|
|
|
rearm_wake_irq(acpi_sci_irq);
|
|
}
|
|
|
|
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)
|
|
{
|
|
s2idle_set_ops(&acpi_s2idle_ops);
|
|
}
|
|
|
|
static void acpi_sleep_suspend_setup(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++)
|
|
if (acpi_sleep_state_supported(i))
|
|
sleep_states[i] = 1;
|
|
|
|
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 */
|
|
|
|
bool acpi_s2idle_wakeup(void)
|
|
{
|
|
return s2idle_wakeup;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static u32 saved_bm_rld;
|
|
|
|
static int acpi_save_bm_rld(void)
|
|
{
|
|
acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld);
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_restore_bm_rld(void)
|
|
{
|
|
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);
|
|
}
|
|
|
|
static struct syscore_ops acpi_sleep_syscore_ops = {
|
|
.suspend = acpi_save_bm_rld,
|
|
.resume = acpi_restore_bm_rld,
|
|
};
|
|
|
|
static void acpi_sleep_syscore_init(void)
|
|
{
|
|
register_syscore_ops(&acpi_sleep_syscore_ops);
|
|
}
|
|
#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;
|
|
static bool nosigcheck;
|
|
|
|
void __init acpi_no_s4_hw_signature(void)
|
|
{
|
|
nosigcheck = true;
|
|
}
|
|
|
|
static int acpi_hibernation_begin(pm_message_t stage)
|
|
{
|
|
if (!nvs_nosave) {
|
|
int error = suspend_nvs_alloc();
|
|
if (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 */
|
|
acpi_leave_sleep_state_prep(ACPI_STATE_S4);
|
|
|
|
return ACPI_SUCCESS(status) ? 0 : -EFAULT;
|
|
}
|
|
|
|
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.
|
|
*/
|
|
acpi_enable();
|
|
/* Reprogram control registers */
|
|
acpi_leave_sleep_state_prep(ACPI_STATE_S4);
|
|
/* Check the hardware signature */
|
|
if (facs && s4_hardware_signature != facs->hardware_signature)
|
|
pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n");
|
|
/* Restore the NVS memory area */
|
|
suspend_nvs_restore();
|
|
/* Allow EC transactions to happen. */
|
|
acpi_ec_unblock_transactions();
|
|
}
|
|
|
|
static void acpi_pm_thaw(void)
|
|
{
|
|
acpi_ec_unblock_transactions();
|
|
acpi_enable_all_runtime_gpes();
|
|
}
|
|
|
|
static const struct platform_hibernation_ops acpi_hibernation_ops = {
|
|
.begin = acpi_hibernation_begin,
|
|
.end = acpi_pm_end,
|
|
.pre_snapshot = acpi_pm_prepare,
|
|
.finish = acpi_pm_finish,
|
|
.prepare = acpi_pm_prepare,
|
|
.enter = acpi_hibernation_enter,
|
|
.leave = acpi_hibernation_leave,
|
|
.pre_restore = acpi_pm_freeze,
|
|
.restore_cleanup = acpi_pm_thaw,
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
static int acpi_hibernation_begin_old(pm_message_t stage)
|
|
{
|
|
int error;
|
|
/*
|
|
* The _TTS object should always be evaluated before the _PTS object.
|
|
* When the old_suspended_ordering is true, the _PTS object is
|
|
* evaluated in the acpi_sleep_prepare.
|
|
*/
|
|
acpi_sleep_tts_switch(ACPI_STATE_S4);
|
|
|
|
error = acpi_sleep_prepare(ACPI_STATE_S4);
|
|
if (error)
|
|
return error;
|
|
|
|
if (!nvs_nosave) {
|
|
error = suspend_nvs_alloc();
|
|
if (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;
|
|
}
|
|
|
|
/*
|
|
* The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
|
|
* been requested.
|
|
*/
|
|
static const struct platform_hibernation_ops acpi_hibernation_ops_old = {
|
|
.begin = acpi_hibernation_begin_old,
|
|
.end = acpi_pm_end,
|
|
.pre_snapshot = acpi_pm_pre_suspend,
|
|
.prepare = acpi_pm_freeze,
|
|
.finish = acpi_pm_finish,
|
|
.enter = acpi_hibernation_enter,
|
|
.leave = acpi_hibernation_leave,
|
|
.pre_restore = acpi_pm_freeze,
|
|
.restore_cleanup = acpi_pm_thaw,
|
|
.recover = acpi_pm_finish,
|
|
};
|
|
|
|
static void acpi_sleep_hibernate_setup(void)
|
|
{
|
|
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)
|
|
return;
|
|
|
|
acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs);
|
|
if (facs)
|
|
s4_hardware_signature = facs->hardware_signature;
|
|
}
|
|
#else /* !CONFIG_HIBERNATION */
|
|
static inline void acpi_sleep_hibernate_setup(void) {}
|
|
#endif /* !CONFIG_HIBERNATION */
|
|
|
|
static void acpi_power_off_prepare(void)
|
|
{
|
|
/* Prepare to power off the system */
|
|
acpi_sleep_prepare(ACPI_STATE_S5);
|
|
acpi_disable_all_gpes();
|
|
acpi_os_wait_events_complete();
|
|
}
|
|
|
|
static void acpi_power_off(void)
|
|
{
|
|
/* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
|
|
printk(KERN_DEBUG "%s called\n", __func__);
|
|
local_irq_disable();
|
|
acpi_enter_sleep_state(ACPI_STATE_S5);
|
|
}
|
|
|
|
int __init acpi_sleep_init(void)
|
|
{
|
|
char supported[ACPI_S_STATE_COUNT * 3 + 1];
|
|
char *pos = supported;
|
|
int i;
|
|
|
|
acpi_sleep_dmi_check();
|
|
|
|
sleep_states[ACPI_STATE_S0] = 1;
|
|
|
|
acpi_sleep_syscore_init();
|
|
acpi_sleep_suspend_setup();
|
|
acpi_sleep_hibernate_setup();
|
|
|
|
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;
|
|
} else {
|
|
acpi_no_s5 = true;
|
|
}
|
|
|
|
supported[0] = 0;
|
|
for (i = 0; i < ACPI_S_STATE_COUNT; i++) {
|
|
if (sleep_states[i])
|
|
pos += sprintf(pos, " S%d", i);
|
|
}
|
|
pr_info(PREFIX "(supports%s)\n", supported);
|
|
|
|
/*
|
|
* Register the tts_notifier to reboot notifier list so that the _TTS
|
|
* object can also be evaluated when the system enters S5.
|
|
*/
|
|
register_reboot_notifier(&tts_notifier);
|
|
return 0;
|
|
}
|