From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC 0/2] fix dma_map_sg not to do barriers for each buffer
Date: Wed, 10 Feb 2010 22:40:30 +0000 [thread overview]
Message-ID: <20100210224030.GC30854@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <4B7324D3.1000509@xenotime.net>
On Wed, Feb 10, 2010 at 01:27:47PM -0800, Randy Dunlap wrote:
> On 02/10/10 12:37, adharmap at codeaurora.org wrote:
> > From: Abhijeet Dharmapurikar <adharmap@quicinc.com>
> >
> > Please refer to the post here
> > http://lkml.org/lkml/2010/1/4/347
> >
> > These changes are to introduce barrierless dma_map_area and dma_unmap_area and
> > use them to map the buffers in the scatterlist. For the last buffer, call
> > the normal dma_map_area(aka with barriers) effectively executing the barrier
> > at the end of the operation.
> >
> > Note that the barrierless operations are implemented for few arm
> > architectures only and I would implement for others once these are okayed by the
> > community.
>
> So when you add these interfaces for other architectures, you will also
> update Documentation/DMA-API.txt, right??
Do we need barrier-less interfaces for anything other than the dma_*_sg
functions?
next prev parent reply other threads:[~2010-02-10 22:40 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-10 20:37 [RFC 0/2] fix dma_map_sg not to do barriers for each buffer adharmap at codeaurora.org
2010-02-10 20:37 ` [PATCH 1/2] dma: define barrierless versions of map and unmap area adharmap at codeaurora.org
2010-02-10 20:37 ` [PATCH 2/2] dma: fix scatter-gather api to use barrierless map/unmap functions adharmap at codeaurora.org
2010-02-10 21:21 ` [RFC 0/2] fix dma_map_sg not to do barriers for each buffer Russell King - ARM Linux
2010-02-10 23:28 ` Abhijeet Dharmapurikar
2010-02-10 23:57 ` Russell King - ARM Linux
2010-02-11 21:36 ` Abhijeet Dharmapurikar
2010-02-11 10:45 ` Catalin Marinas
2010-02-11 10:53 ` Catalin Marinas
2010-02-11 11:01 ` Russell King - ARM Linux
2010-02-11 11:03 ` Catalin Marinas
2010-02-11 10:56 ` Russell King - ARM Linux
2010-02-11 19:13 ` Abhijeet Dharmapurikar
2010-02-10 21:27 ` Randy Dunlap
2010-02-10 22:40 ` Russell King - ARM Linux [this message]
2010-02-10 23:10 ` Abhijeet Dharmapurikar
2010-02-11 0:39 ` FUJITA Tomonori
2010-02-11 0:41 ` Randy Dunlap
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