linux-kernel - Re: [PATCH 1/4] ACPI: Allow _DMA method in walk resources

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Message-ID: <20170721102001.GB940@red-moon>
Date:   Fri, 21 Jul 2017 11:20:01 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     "Moore, Robert" <robert.moore@...el.com>
Cc:     "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Zhang, Rui" <rui.zhang@...el.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Will Deacon <will.deacon@....com>,
        Robin Murphy <robin.murphy@....com>,
        Hanjun Guo <hanjun.guo@...aro.org>, Feng Kan <fkan@....com>,
        Jon Masters <jcm@...hat.com>,
        Nate Watterson <nwatters@...eaurora.org>
Subject: Re: [PATCH 1/4] ACPI: Allow _DMA method in walk resources

On Thu, Jul 20, 2017 at 03:50:16PM +0000, Moore, Robert wrote:
> Could you post this as a pull request on our github?
> 
> https://github.com/acpica/acpica

Sure, will do, thanks !

Lorenzo

> > -----Original Message-----
> > From: Moore, Robert
> > Sent: Thursday, July 20, 2017 8:49 AM
> > To: 'Lorenzo Pieralisi' <lorenzo.pieralisi@....com>; linux-
> > acpi@...r.kernel.org
> > Cc: linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org;
> > Zhang, Rui <rui.zhang@...el.com>; Rafael J. Wysocki <rjw@...ysocki.net>;
> > Will Deacon <will.deacon@....com>; Robin Murphy <robin.murphy@....com>;
> > Hanjun Guo <hanjun.guo@...aro.org>; Feng Kan <fkan@....com>; Jon Masters
> > <jcm@...hat.com>; Nate Watterson <nwatters@...eaurora.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@....com]
> > > Sent: Thursday, July 20, 2017 7:45 AM
> > > To: linux-acpi@...r.kernel.org
> > > Cc: linux-arm-kernel@...ts.infradead.org;
> > > linux-kernel@...r.kernel.org; Lorenzo Pieralisi
> > > <lorenzo.pieralisi@....com>; Moore, Robert <robert.moore@...el.com>;
> > Zhang, Rui <rui.zhang@...el.com>; Rafael J.
> > > Wysocki <rjw@...ysocki.net>; Will Deacon <will.deacon@....com>; Robin
> > > Murphy <robin.murphy@....com>; Hanjun Guo <hanjun.guo@...aro.org>;
> > > Feng Kan <fkan@....com>; Jon Masters <jcm@...hat.com>; Nate Watterson
> > > <nwatters@...eaurora.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@....com>
> > > Cc: Robert Moore <robert.moore@...el.com>
> > > Cc: Zhang Rui <rui.zhang@...el.com>
> > > Cc: "Rafael J. Wysocki" <rjw@...ysocki.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
>