linux-kernel - RE: [PATCH 2/5] iommu/amd: Implement DOMAIN_ATTR

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Message-ID: <C5ECD7A89D1DC44195F34B25E172658D043BD1@039-SN2MPN1-012.039d.mgd.msft.net>
Date:	Wed, 1 Feb 2012 09:37:52 +0000
From:	Sethi Varun-B16395 <B16395@...escale.com>
To:	Joerg Roedel <joerg.roedel@....com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
CC:	Ohad Ben-Cohen <ohad@...ery.com>, Tony Lindgren <tony@...mide.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	Wood Scott-B07421 <B07421@...escale.com>,
	David Brown <davidb@...eaurora.org>,
	David Woodhouse <dwmw2@...radead.org>
Subject: RE: [PATCH 2/5] iommu/amd: Implement DOMAIN_ATTR_GEOMETRY attribute



> -----Original Message-----
> From: iommu-bounces@...ts.linux-foundation.org [mailto:iommu-
> bounces@...ts.linux-foundation.org] On Behalf Of Joerg Roedel
> Sent: Friday, January 20, 2012 9:31 PM
> To: Laurent Pinchart
> Cc: Ohad Ben-Cohen; Tony Lindgren; linux-kernel@...r.kernel.org;
> iommu@...ts.linux-foundation.org; Wood Scott-B07421; David Brown; David
> Woodhouse
> Subject: Re: [PATCH 2/5] iommu/amd: Implement DOMAIN_ATTR_GEOMETRY
> attribute
> 
> On Thu, Jan 19, 2012 at 05:27:09PM +0100, Laurent Pinchart wrote:
> > > Well, u64 is a catch-all datatype which should suit all drivers. Is
> > > this a problem at ARM?
> >
> > No, it's not a problem for ARM, at least to my knowledge. It just
> > struck me as weird, as we have specific data types for other kinds of
> > addresses (such as dma_addr_t).
> 
> Okay, I looked at the definition and dma_addr_t seems like a good fit.
> To be consistent we should change the iova type of the map/unmap
> functions to dma_addr_t too.
This change is certainly required in the iommu API map/unmap calls.

-Varun

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