From 2744d7a0733503931b71c00d156119ced002f22c Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Wed, 9 Jun 2021 13:40:17 -0500 Subject: ACPI: Check StorageD3Enable _DSD property in ACPI code Although first implemented for NVME, this check may be usable by other drivers as well. Microsoft's specification explicitly mentions that is may be usable by SATA and AHCI devices. Google also indicates that they have used this with SDHCI in a downstream kernel tree that a user can plug a storage device into. Link: https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/power-management-for-storage-hardware-devices-intro Suggested-by: Keith Busch CC: Shyam-sundar S-k CC: Alexander Deucher CC: Rafael J. Wysocki CC: Prike Liang Signed-off-by: Mario Limonciello Reviewed-by: Rafael J. Wysocki Signed-off-by: Christoph Hellwig --- include/linux/acpi.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux/acpi.h') diff --git a/include/linux/acpi.h b/include/linux/acpi.h index c60745f657e9..dd0dafd21e33 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1004,6 +1004,7 @@ int acpi_dev_resume(struct device *dev); int acpi_subsys_runtime_suspend(struct device *dev); int acpi_subsys_runtime_resume(struct device *dev); int acpi_dev_pm_attach(struct device *dev, bool power_on); +bool acpi_storage_d3(struct device *dev); #else static inline int acpi_subsys_runtime_suspend(struct device *dev) { return 0; } static inline int acpi_subsys_runtime_resume(struct device *dev) { return 0; } @@ -1011,6 +1012,10 @@ static inline int acpi_dev_pm_attach(struct device *dev, bool power_on) { return 0; } +static inline bool acpi_storage_d3(struct device *dev) +{ + return false; +} #endif #if defined(CONFIG_ACPI) && defined(CONFIG_PM_SLEEP) -- cgit v1.2.3