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ACPICA: Resources: Allow _DMA method in walk resources 

ACPICA commit af661c00afac7aa481a961fa48c6540a99ad64a6

The _DMA object contains a resource template, this change
adds support for the walk resources function so that ACPI
devices containing a _DMA object can actually parse it to
detect DMA ranges for the respective bus.

Link: https://github.com/acpica/acpica/commit/af661c00
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore 2017-08-03 14:27:35 +08:00 committed by Rafael J. Wysocki
parent 376a588cec
commit 137c78352e
2 changed files with 5 additions and 3 deletions
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7
drivers/acpi/acpica/rsxface.c
View File

@ -615,7 +615,7 @@ ACPI_EXPORT_SYMBOL(acpi_walk_resource_buffer)
* device we are querying
* name - Method name of the resources we want.
* (METHOD_NAME__CRS, METHOD_NAME__PRS, or
* METHOD_NAME__AEI)
* METHOD_NAME__AEI or METHOD_NAME__DMA)
* user_function - Called for each resource
* context - Passed to user_function
*
@ -641,11 +641,12 @@ acpi_walk_resources(acpi_handle device_handle,
if (!device_handle || !user_function || !name ||
(!ACPI_COMPARE_NAME(name, METHOD_NAME__CRS) &&
!ACPI_COMPARE_NAME(name, METHOD_NAME__PRS) &&
!ACPI_COMPARE_NAME(name, METHOD_NAME__AEI))) {
!ACPI_COMPARE_NAME(name, METHOD_NAME__AEI) &&
!ACPI_COMPARE_NAME(name, METHOD_NAME__DMA))) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Get the _CRS/_PRS/_AEI resource list */
/* Get the _CRS/_PRS/_AEI/_DMA resource list */
buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
status = acpi_rs_get_method_data(device_handle, name, &buffer);

1
include/acpi/acnames.h
View File

@ -54,6 +54,7 @@
#define METHOD_NAME__CLS "_CLS"
#define METHOD_NAME__CRS "_CRS"
#define METHOD_NAME__DDN "_DDN"
#define METHOD_NAME__DMA "_DMA"
#define METHOD_NAME__HID "_HID"
#define METHOD_NAME__INI "_INI"
#define METHOD_NAME__PLD "_PLD"