On Jun 23, 2009, at 5:18 AM, Li Yang wrote:

On Tue, Jun 23, 2009 at 5:20 AM, Dan  
Williams[off-list ref] wrote:

quoted

On Fri, 2009-06-19 at 12:31 -0700, Ira Snyder wrote:

quoted

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 <redacted>
---

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.

Acked-by: Li Yang <redacted>

However, the addition of arch/powerpc/include/asm/fsldma.h still needs
the ack from Kumar.  It doesn't seem to be a common practice though.

hmm, why are we moving fsldma.h?

- k