[PATCH 1/4] ACPI: Allow _DMA method in walk resources

[Moore, Robert]

Could you post this as a pull request on our github?

https://github.com/acpica/acpica

> -----Original Message-----
> From: Moore, Robert
> Sent: Thursday, July 20, 2017 8:49 AM
> To: 'Lorenzo Pieralisi' <lorenzo.pieralisi at arm.com>; linux-
> acpi at vger.kernel.org
> Cc: linux-arm-kernel at lists.infradead.org; linux-kernel at vger.kernel.org;
> Zhang, Rui <rui.zhang at intel.com>; Rafael J. Wysocki <rjw at rjwysocki.net>;
> Will Deacon <will.deacon at arm.com>; Robin Murphy <robin.murphy at arm.com>;
> Hanjun Guo <hanjun.guo at linaro.org>; Feng Kan <fkan at apm.com>; Jon Masters
> <jcm at redhat.com>; Nate Watterson <nwatters at codeaurora.org>
> Subject: RE: [PATCH 1/4] ACPI: Allow _DMA method in walk resources
> 
> I think we can take this as-is into ACPICA.
> Bob
> 
> 
> > -----Original Message-----
> > From: Lorenzo Pieralisi [mailto:lorenzo.pieralisi at arm.com]
> > Sent: Thursday, July 20, 2017 7:45 AM
> > To: linux-acpi at vger.kernel.org
> > Cc: linux-arm-kernel at lists.infradead.org;
> > linux-kernel at vger.kernel.org; Lorenzo Pieralisi
> > <lorenzo.pieralisi at arm.com>; Moore, Robert <robert.moore at intel.com>;
> Zhang, Rui <rui.zhang at intel.com>; Rafael J.
> > Wysocki <rjw at rjwysocki.net>; Will Deacon <will.deacon at arm.com>; Robin
> > Murphy <robin.murphy at arm.com>; Hanjun Guo <hanjun.guo at linaro.org>;
> > Feng Kan <fkan at apm.com>; Jon Masters <jcm at redhat.com>; Nate Watterson
> > <nwatters at codeaurora.org>
> > 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 <lorenzo.pieralisi at arm.com>
> > Cc: Robert Moore <robert.moore at intel.com>
> > Cc: Zhang Rui <rui.zhang at intel.com>
> > Cc: "Rafael J. Wysocki" <rjw at rjwysocki.net>
> > ---
> >  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