linux-kernel - RE: [PATCH 1/6 v8] iommu/fsl: Store iommu domain information pointer in archdata.

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Date:	Wed, 27 Feb 2013 12:04:20 +0000
From:	Sethi Varun-B16395 <B16395@...escale.com>
To:	Kumar Gala <galak@...nel.crashing.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC:	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Wood Scott-B07421 <B07421@...escale.com>,
	Yoder Stuart-B08248 <B08248@...escale.com>,
	Joerg Roedel <joro@...tes.org>
Subject: RE: [PATCH 1/6 v8] iommu/fsl: Store iommu domain information
 pointer in archdata.

Hi Kumar,Ben,
I am implementing the Freescale PAMU (IOMMU) driver using the Linux IOMMU API. In this particular patch, I have added a new field to dev_archdata structure to store the dma domain information.
This field is updated whenever we attach a device to an iommu domain.

Regards
Varun

> -----Original Message-----
> From: Joerg Roedel [mailto:joro@...tes.org]
> Sent: Wednesday, February 27, 2013 5:01 PM
> To: Sethi Varun-B16395
> Cc: iommu@...ts.linux-foundation.org; linuxppc-dev@...ts.ozlabs.org;
> linux-kernel@...r.kernel.org; Wood Scott-B07421; Yoder Stuart-B08248
> Subject: Re: [PATCH 1/6 v8] iommu/fsl: Store iommu domain information
> pointer in archdata.
> 
> On Mon, Feb 18, 2013 at 06:22:14PM +0530, Varun Sethi wrote:
> > Add a new field in the device (powerpc) archdata structure for storing
> > iommu domain information pointer. This pointer is stored when the
> > device is attached to a particular domain.
> >
> >
> > Signed-off-by: Varun Sethi <Varun.Sethi@...escale.com>
> > ---
> > - no change.
> >  arch/powerpc/include/asm/device.h |    4 ++++
> >  1 files changed, 4 insertions(+), 0 deletions(-)
> >
> > diff --git a/arch/powerpc/include/asm/device.h
> > b/arch/powerpc/include/asm/device.h
> > index 77e97dd..6dc79fe 100644
> > --- a/arch/powerpc/include/asm/device.h
> > +++ b/arch/powerpc/include/asm/device.h
> > @@ -28,6 +28,10 @@ struct dev_archdata {
> >  		void		*iommu_table_base;
> >  	} dma_data;
> >
> > +	/* IOMMU domain information pointer. This would be set
> > +	 * when this device is attached to an iommu_domain.
> > +	 */
> > +	void			*iommu_domain;
> 
> Please Cc the PowerPC Maintainers on this, so that they can have a look
> at it. This also must be put this into an #ifdef CONFIG_IOMMU_API.
> 
> 
> 	Joerg
> 
> 


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