[PATCH] mmc: mxs-mmc: add support for pre_req and post_req

[Shawn Guo]

On Wed, Apr 20, 2011 at 10:01:22AM +0200, Per Forlin wrote:
> On 17 April 2011 18:48, Shawn Guo <shawn.guo at freescale.com> wrote:
> > On Mon, Apr 18, 2011 at 12:33:30AM +0800, Shawn Guo wrote:
> >> pre_req() runs dma_map_sg() post_req() runs dma_unmap_sg.
> >> If not calling pre_req() before mxs_mmc_request(), request()
> >> will prepare the cache just like it did it before.
> >> It is optional to use pre_req() and post_req().
> >>
> >> Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
> >> ---
> >>  drivers/mmc/host/mxs-mmc.c |   75 ++++++++++++++++++++++++++++++++++++++++++--
> >>  1 files changed, 72 insertions(+), 3 deletions(-)
> >>
> >
> > Here is the result of mmc_test case 37 ~ 40, which are designed to see
> > the performance improvement introduced by non-blocking changes.
> >
> > Honestly, the improvement is not so impressive.  Not sure if the patch
> > for mxs-mmc pre_req and post_req support was correctly produced.  So
> > please help review ...
> My guess is that dma_unmap is not run in parallel with transfer.
> Please look at my patch reply.
> 
Got it fixed in v2 posted just now.  Please take another look.
Unfortunately, I do not see noticeable difference than v1 in terms
of mmc_test result.

Do you have omap_hsmmc and mmci mmc_test result data to share?

-- 
Regards,
Shawn