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SubjectPrimeCell generic DMA v10
Date
This is	the tenth iteration of this patchset...

Now DMA is working nicely on the following platforms and
PrimeCells:

- U300 PL011, PL022, PL180
- U8500 PL011, PL022, PL180
- RealView PB11MPCore PL011, PL022

PL180 (MMC) is not working with the MMC and DMA, I haven't
drilled into why, could be some FIFO overflow or similar.
I think DMA could actually be activated for all the RealViews
with a working DMA controller (EB, PB11MPCore, PBA8 and PBX)
but since I cannot test them I left them out of the patch set.

I ran some serious stress tests on the PB11MPCore, with two
threads submitting DMA memcpy jobs while making transfers
on PL011 and PL022 simultaneously, no problems.

I read up on DMA-API and proofread all three drivers with
that in mind, but I cannot find any more misuses of the
API. (The latest unecessary sync call in PL022 that Russell
found is removed.)

The compilation problem Grant saw on the PL022 driver I have
*still* not been able to reproduce so I am in the blue on
this one. It compiles nicely for U300, U8500 and RealView.
I need help if there is still problems with this.

Yours,
Linus Walleij



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