On Mon, Jun 06, 2011 at 04:09:33PM -0400, Ohad Ben-Cohen wrote:
On Mon, Jun 6, 2011 at 10:20 PM, Roedel, Joerg joerg.roe...@amd.com wrote:
Well, it certainly makes sense to have a single implementation for this.
But I want to hide this complexity to the user of the IOMMU-API. The
best
On Tue, Jun 7, 2011 at 10:52 AM, Roedel, Joerg joerg.roe...@amd.com wrote:
Yup. Btw, is there any IOMMU hardware which supports non-natural
alignment? In this case we need to expose these requirements somehow.
Not sure there are. Let's start with natural alignment, and extend it
only if someone
On Tue, Jun 07, 2011 at 05:22:11AM -0400, Ohad Ben-Cohen wrote:
On Tue, Jun 7, 2011 at 10:52 AM, Roedel, Joerg joerg.roe...@amd.com wrote:
Yup. Btw, is there any IOMMU hardware which supports non-natural
alignment? In this case we need to expose these requirements somehow.
Not sure there
On Tue, Jun 7, 2011 at 12:58 PM, Roedel, Joerg joerg.roe...@amd.com wrote:
Btw, mind to split out your changes which move the iommu-api into
drivers/iommu? I can merge them meanwhile into my iommu tree and start
working on a proposal for the generic large page-size support.
Sure, that will be
On Sunday 05 June 2011, Ohad Ben-Cohen wrote:
As far as I can tell, once we have that in
place, we you can migrate omap3isp from iovmm to dma-mapping and
remove iovmm.
Sounds like a plan.
I'd still prefer us to take small steps here, and not gate the omap
iommu cleanups with Marek's
Hi,
On Thu, Jun 02, 2011 at 06:27:37PM -0400, Ohad Ben-Cohen wrote:
First stab at iommu consolidation:
- Migrate OMAP's iommu driver to the generic iommu API. With this in hand,
users can now start using the generic iommu layer instead of calling
omap-specific iommu API.
New code
Hi Joerg,
On Mon, Jun 6, 2011 at 1:09 PM, Roedel, Joerg joerg.roe...@amd.com wrote:
The IOMMU-API already supports multiple page-sizes. See the
'order'-parameter of the map/unmap functions.
This is insufficient; users need somehow to tell what page sizes are
supported by the underlying
On Mon, Jun 6, 2011 at 12:10 PM, Arnd Bergmann a...@arndb.de wrote:
I'd still prefer us to take small steps here, and not gate the omap
iommu cleanups with Marek's generic dma_map_ops work though. Let's go
forward and migrate omap's iommu to the generic iommu API, so new code
will be able to
On Mon, Jun 06, 2011 at 11:15:30AM -0400, Ohad Ben-Cohen wrote:
This is insufficient; users need somehow to tell what page sizes are
supported by the underlying hardware (we can't assume host page-sizes,
and we want to use bigger pages whenever possible, to relax the TLB
pressure).
/
What
On Mon, Jun 6, 2011 at 10:20 PM, Roedel, Joerg joerg.roe...@amd.com wrote:
Well, it certainly makes sense to have a single implementation for this.
But I want to hide this complexity to the user of the IOMMU-API. The
best choice is to put this into the layer between the IOMMU-API and the
Hi Arnd,
On Fri, Jun 3, 2011 at 6:53 PM, Arnd Bergmann a...@arndb.de wrote:
I think the future of iovmm is looking not so good. Marek Szyprowski
is working on a generic version of the dma-mapping API (dma_map_ops)
based on the iommu API.
Nice! I missed Marek's work somehow.
As far as I can
Hi Kyungmin,
On Fri, Jun 3, 2011 at 2:57 AM, Kyungmin Park kmp...@infradead.org wrote:
Please see the RFC patch, ARM: DMA-mapping IOMMU integration
http://www.spinics.net/lists/linux-mm/msg19856.html
Marek's work somehow escaped me, thanks for the pointers !
Ohad.
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On Friday 03 June 2011, Ohad Ben-Cohen wrote:
First stab at iommu consolidation:
Hi Ohad,
Great to see your progress here!
- Migrate OMAP's iommu driver to the generic iommu API. With this in hand,
users can now start using the generic iommu layer instead of calling
omap-specific iommu
First stab at iommu consolidation:
- Migrate OMAP's iommu driver to the generic iommu API. With this in hand,
users can now start using the generic iommu layer instead of calling
omap-specific iommu API.
New code that requires functionality missing from the generic iommu api,
will add
Hi,
Good approach.
CC'ed the Samsung IOMMU developer. Marek.
BTW, Russell wants to use the DMA based IOMMU?
Please see the RFC patch, ARM: DMA-mapping IOMMU integration
http://www.spinics.net/lists/linux-mm/msg19856.html
Thank you,
Kyungmin Park
On Fri, Jun 3, 2011 at 7:27 AM, Ohad Ben-Cohen
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