Clifford Wolf schrieb:

On Mon, Jun 25, 2007 at 08:01:10PM +0200, Clifford Wolf wrote:

quoted

I've put a 'draft header file' of an api as I would have expected it
online: [...]

Ok, so here comes the first implementation:
(I also have other projects, so it took a while.. ;-)

	http://www.clifford.at/priv/dmatransfer-20070704.diff

This is just for the MPC8349 DMA now, registers are still hardcoded in the
driver instead of beeing taken from the platform files and support for
scatter-gather is still missing and the Kconfig integration isn't checking
if we are building for the mpc8349 (or even ppc) yet. But I think the
direction of the API is pretty clear.

That looks good. It should be useful on other PowerQUICC's DMA engines
and maybe even for the MPC5200 BestComm, too, with some changes.

The patch also contains a hackish demo client (dma_demo_client.ko) which is
performing some dma transfers in the 256th MB of physical memory. So it
should only be used on a machine with 256MB of memory bootet with mem=255M
(but changing that should be trivial). The demo client shows well how the
API works and how much overhead the API adds.

Any feedback this time?

Sorry, I'm currently busy with some hardware design work.
But if you want to test some code, I can get you an SSH account on my
MPC8540 platform.

Best regards,
-- 
Clemens Koller
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