From: Joerg Roedel <joro@8bytes.org>
To: Sethi Varun-B16395 <B16395@freescale.com>
Cc: Stuart Yoder <b08248@gmail.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Wood Scott-B07421 <B07421@freescale.com>
Subject: Re: [PATCH 5/5] iommu: Add DOMAIN_ATTR_WINDOWS domain attribute
Date: Tue, 5 Feb 2013 14:05:34 +0100 [thread overview]
Message-ID: <20130205130534.GS25591@8bytes.org> (raw)
In-Reply-To: <C5ECD7A89D1DC44195F34B25E172658D3752B1@039-SN2MPN1-013.039d.mgd.msft.net>
On Tue, Feb 05, 2013 at 10:52:03AM +0000, Sethi Varun-B16395 wrote:
> DOMAIN_ATTR_PAMU_ENABLE is required to enable a particular DMA window.
> My point is about the domain geometry, which is incomplete in case of
> PAMU without the number of subwindows. Geometry parameters are used
> for initializing the PAMU window settings. Individual subwindows can
> only be enabled, once the PAMU window has been initialized using the
> geometry settings.
I understand that. What you do is:
/* Set geometry */
set_attr(domain, DOMAIN_ATTR_GEOMETRY);
/* Set number of PAMU subwindows */
set_attr(domain, DOMAIN_ATTR_WINDOWS);
/* Commit changes to hardware and enable the window */
set_attr(domain, DOMAIN_ATTR_PAMU_ENABLE);
And I don't see any problem with that. The domain_attr interface was
introduced to cope with device specifics, we don't change global
interface data structures for that.
Joerg
next prev parent reply other threads:[~2013-02-05 13:05 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-04 13:18 [PATCH 0/5 v2] iommu: Support non-paging IOMMUs Joerg Roedel
2013-02-04 13:18 ` [PATCH 1/5] iommu: Make sure DOMAIN_ATTR_MAX is really the maximum Joerg Roedel
2013-02-04 13:18 ` [PATCH 2/5] iommu: Check for valid pgsize_bitmap in iommu_map/unmap Joerg Roedel
2013-02-04 13:18 ` [PATCH 3/5] iommu: Implement DOMAIN_ATTR_PAGING attribute Joerg Roedel
2013-02-04 13:18 ` [PATCH 4/5] iommu: Add domain window handling functions Joerg Roedel
2013-02-04 18:10 ` Stuart Yoder
2013-02-04 18:56 ` Joerg Roedel
2013-02-04 23:31 ` Stuart Yoder
2013-02-05 13:20 ` Joerg Roedel
2013-02-06 10:26 ` Joerg Roedel
2013-02-06 10:49 ` Sethi Varun-B16395
2013-02-04 13:18 ` [PATCH 5/5] iommu: Add DOMAIN_ATTR_WINDOWS domain attribute Joerg Roedel
2013-02-05 9:14 ` Sethi Varun-B16395
2013-02-05 10:41 ` Joerg Roedel
2013-02-05 10:52 ` Sethi Varun-B16395
2013-02-05 13:05 ` Joerg Roedel [this message]
2013-02-05 17:15 ` Sethi Varun-B16395
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