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Commit 137c7835 authored by Bob Moore's avatar Bob Moore Committed by Rafael J. Wysocki
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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: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 376a588c

drivers/acpi/acpica/rsxface.c

+4 −3
Original line number Diff line number Diff line
@@ -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);

include/acpi/acnames.h

+1 −0
Original line number Diff line number Diff line
@@ -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"