diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/device_pm.c | 32 | ||||
| -rw-r--r-- | drivers/acpi/internal.h | 9 | ||||
| -rw-r--r-- | drivers/acpi/x86/utils.c | 25 |
3 files changed, 66 insertions, 0 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index d260bc1f3e6e..6dd9bd64903e 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -1340,4 +1340,36 @@ int acpi_dev_pm_attach(struct device *dev, bool power_on) return 1; } EXPORT_SYMBOL_GPL(acpi_dev_pm_attach); + +/** + * acpi_storage_d3 - Check if D3 should be used in the suspend path + * @dev: Device to check + * + * Return %true if the platform firmware wants @dev to be programmed + * into D3hot or D3cold (if supported) in the suspend path, or %false + * when there is no specific preference. On some platforms, if this + * hint is ignored, @dev may remain unresponsive after suspending the + * platform as a whole. + * + * Although the property has storage in the name it actually is + * applied to the PCIe slot and plugging in a non-storage device the + * same platform restrictions will likely apply. + */ +bool acpi_storage_d3(struct device *dev) +{ + struct acpi_device *adev = ACPI_COMPANION(dev); + u8 val; + + if (force_storage_d3()) + return true; + + if (!adev) + return false; + if (fwnode_property_read_u8(acpi_fwnode_handle(adev), "StorageD3Enable", + &val)) + return false; + return val == 1; +} +EXPORT_SYMBOL_GPL(acpi_storage_d3); + #endif /* CONFIG_PM */ diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index f973bbe90e5e..e29ec463bb07 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -236,6 +236,15 @@ static inline int suspend_nvs_save(void) { return 0; } static inline void suspend_nvs_restore(void) {} #endif +#ifdef CONFIG_X86 +bool force_storage_d3(void); +#else +static inline bool force_storage_d3(void) +{ + return false; +} +#endif + /*-------------------------------------------------------------------------- Device properties -------------------------------------------------------------------------- */ diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c index bdc1ba00aee9..f22f23933063 100644 --- a/drivers/acpi/x86/utils.c +++ b/drivers/acpi/x86/utils.c @@ -135,3 +135,28 @@ bool acpi_device_always_present(struct acpi_device *adev) return ret; } + +/* + * AMD systems from Renoir and Lucienne *require* that the NVME controller + * is put into D3 over a Modern Standby / suspend-to-idle cycle. + * + * This is "typically" accomplished using the `StorageD3Enable` + * property in the _DSD that is checked via the `acpi_storage_d3` function + * but this property was introduced after many of these systems launched + * and most OEM systems don't have it in their BIOS. + * + * The Microsoft documentation for StorageD3Enable mentioned that Windows has + * a hardcoded allowlist for D3 support, which was used for these platforms. + * + * This allows quirking on Linux in a similar fashion. + */ +static const struct x86_cpu_id storage_d3_cpu_ids[] = { + X86_MATCH_VENDOR_FAM_MODEL(AMD, 23, 96, NULL), /* Renoir */ + X86_MATCH_VENDOR_FAM_MODEL(AMD, 23, 104, NULL), /* Lucienne */ + {} +}; + +bool force_storage_d3(void) +{ + return x86_match_cpu(storage_d3_cpu_ids); +} |