I think we can take this as-is into ACPICA. Bob
> -----Original Message----- > From: Lorenzo Pieralisi [mailto:[email protected]] > Sent: Thursday, July 20, 2017 7:45 AM > To: [email protected] > Cc: [email protected]; [email protected]; > Lorenzo Pieralisi <[email protected]>; Moore, Robert > <[email protected]>; Zhang, Rui <[email protected]>; Rafael J. > Wysocki <[email protected]>; Will Deacon <[email protected]>; Robin > Murphy <[email protected]>; Hanjun Guo <[email protected]>; Feng > Kan <[email protected]>; Jon Masters <[email protected]>; Nate Watterson > <[email protected]> > Subject: [PATCH 1/4] ACPI: Allow _DMA method in walk resources > > 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. > > Signed-off-by: Lorenzo Pieralisi <[email protected]> > Cc: Robert Moore <[email protected]> > Cc: Zhang Rui <[email protected]> > Cc: "Rafael J. Wysocki" <[email protected]> > --- > drivers/acpi/acpica/rsxface.c | 7 ++++--- > include/acpi/acnames.h | 1 + > 2 files changed, 5 insertions(+), 3 deletions(-) > > diff --git a/drivers/acpi/acpica/rsxface.c > b/drivers/acpi/acpica/rsxface.c index 59a4f9e..be65e65 100644 > --- a/drivers/acpi/acpica/rsxface.c > +++ b/drivers/acpi/acpica/rsxface.c > @@ -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); > diff --git a/include/acpi/acnames.h b/include/acpi/acnames.h index > b421584..d8dd3bf 100644 > --- a/include/acpi/acnames.h > +++ b/include/acpi/acnames.h > @@ -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" > -- > 2.10.0
