[PATCH 0/7] DMAENGINE: fixes and PrimeCells

[dan.j.williams@intel.com (Dan Williams)]

On Sun, May 9, 2010 at 3:06 AM, jassi brar <jassisinghbrar@gmail.com> wrote:
> This discussion is purely about what the current DMA API misses and what
> a generic DMA API should do. So, that the current DMA API fills up those
> gap, if possible. I would love to get started implementing the generic
> DMA API for reference but my priorities are decided by my employer.

Well, the only significant miss that has been identified so far is
dynamic channel allocation for the device-to-mem case.  Everything
else can be done with small tweaks to the existing interface.  But
some of this discussion reminds me of Section 2.4 of
Documentaion/SubmittingPatches:

4) Don't over-design.

Don't try to anticipate nebulous future cases which may or may not
be useful:  "Make it as simple as you can, and no simpler."

Let's just wait for the code before outlining what can and cannot be
done, especially given where we started [1].

--
Dan

[1]: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=include/linux/dmaengine.h;hb=v2.6.18#l160