diff options
| author | Suthikulpanit, Suravee <Suravee.Suthikulpanit@amd.com> | 2015-10-29 01:50:48 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-11-07 03:29:21 +0300 |
| commit | b84f196d963c3159329f72ca1913b08679004a43 (patch) | |
| tree | a017e66514453e0fdc5489076877d1a02a5e568a /include/linux/acpi.h | |
| parent | 1b9863c6aa56d92126ec0d5c42eae25df52b7ca1 (diff) | |
| download | linux-b84f196d963c3159329f72ca1913b08679004a43.tar.xz | |
ACPI: Adding DMA Attribute APIs for ACPI Device
Adding acpi_get_dma_attr() to query DMA attributes of ACPI devices.
It returns the enum dev_dma_attr, which communicates DMA information
more clearly. This API replaces the acpi_check_dma(), which will be
removed in subsequent patch.
This patch also provides a convenient function, acpi_dma_supported(),
to check DMA support of the specified ACPI device.
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/acpi.h')
| -rw-r--r-- | include/linux/acpi.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 496265b0f527..292af3b69ede 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -579,6 +579,16 @@ static inline bool acpi_check_dma(struct acpi_device *adev, bool *coherent) return false; } +static inline bool acpi_dma_supported(struct acpi_device *adev) +{ + return false; +} + +static inline enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev) +{ + return DEV_DMA_NOT_SUPPORTED; +} + #define ACPI_PTR(_ptr) (NULL) #endif /* !CONFIG_ACPI */ |