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ACPI: Check StorageD3Enable _DSD property in ACPI code

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[ Upstream commit 2744d7a0733503931b71c00d156119ced002f22c ]

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 <kbusch@kernel.org>
CC: Shyam-sundar S-k <Shyam-sundar.S-k@amd.com>
CC: Alexander Deucher <Alexander.Deucher@amd.com>
CC: Rafael J. Wysocki <rjw@rjwysocki.net>
CC: Prike Liang <prike.liang@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Stable-dep-of: dad651b2a44e ("nvme-pci: do not set the NUMA node of device if it has none")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mario Limonciello
2021-06-09 13:40:17 -05:00
committed by Greg Kroah-Hartman
parent 67025d5654
commit 38f82cf860
3 changed files with 35 additions and 27 deletions
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5
include/linux/acpi.h
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@@ -1001,6 +1001,7 @@ 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; }
@@ -1008,6 +1009,10 @@ 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)