[PATCH v3 2/2] fsldma: Add DMA_SLAVE support

Dan Williams dan.j.williams at intel.com
Tue Jun 23 07:22:45 EST 2009


On Mon, 2009-06-22 at 14:20 -0700, Dan Williams wrote:
> On Fri, 2009-06-19 at 12:31 -0700, Ira Snyder wrote:
> > Use the DMA_SLAVE capability of the DMAEngine API to copy/from a
> > scatterlist into an arbitrary list of hardware address/length pairs.
> > 
> > This allows a single DMA transaction to copy data from several different
> > devices into a scatterlist at the same time.
> > 
> > This also adds support to enable some controller-specific features such as
> > external start and external pause for a DMA transaction.
> > 
> > Signed-off-by: Ira W. Snyder <iws at ovro.caltech.edu>
> > ---
> > 
> > This patch depends on the "fsldma: split apart external pause and
> > request count features" patch.
> > 
> > After discussion with Dan Williams, this is the third version of the
> > DMA_SLAVE API for the Freescale DMA controller. I've tested it heavily
> > with both drivers I have written against this API, an FPGA programmer
> > and an FPGA data grabber.
> > 
> > Kumar, Dan asked me to add you to the CC list, so you can have a look at
> > this patch before he adds it to his tree.
> > 
> > The other two small patches I posted earlier are very helpful in testing
> > this functionality. They make the fsldma driver leave the BWC (bandwidth
> > control) bits alone on the 83xx controller, as well as making the
> > external start feature available on 83xx.
> > 
> 
> Kumar, Leo,
> 
> Can I get your acked-by's for the current state of async_tx.git/next?  I
> just pushed out Ira's latest so it may take a moment to mirror out.
> 
> Thanks,
> Dan
> 
> The following changes since commit f234012f52a37e48f2330e1ca2df69800e797c3b:
>   Linus Torvalds (1):
>         Merge branch 'for-linus' of git://git.kernel.org/.../drzeus/mmc
> 
> are available in the git repository at:
> 
>   ssh://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx.git next

That should be:

	git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx.git next




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