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

Sethi Varun-B16395
2013-02-27T12:04:31Z

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@8bytes.org]
> Sent: Wednesday, February 27, 2013 5:01 PM
> To: Sethi Varun-B16395
> Cc: iommu@lists.linux-foundation.org; linuxppc-dev@lists.ozlabs.org;
> linux-kernel@vger.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@freescale.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
>
>