[PATCH v2 0/9] DMA engine cookie handling cleanups

[Vinod Koul]

On Mon, 2012-03-12 at 16:11 +0000, Russell King - ARM Linux wrote:
> On Wed, Mar 07, 2012 at 07:24:26PM +0530, Vinod Koul wrote:
> > On Tue, 2012-03-06 at 22:33 +0000, Russell King - ARM Linux wrote:
> > > [v2 - more or less same description.  Including lakml in cc for the full
> > > set]
> > > 
> > > This patch series cleans up the handling of cookies in DMA engine drivers.
> > > This is done by providing a set of inline library functions for common
> > > tasks:
> > > 
> > > - moving the 'last completed cookie' into struct dma_chan - everyone
> > >   has this in their driver private channel data structure
> > > 
> > > - consolidate allocation of cookies to DMA descriptors
> > > 
> > > - common way to update 'last completed cookie' value
> > > 
> > > - standard way to implement tx_status callback and update the residue
> > > 
> > > - consolidate initialization of cookies
> > > 
> > > - update implementations differing from the majority of DMA engine drivers
> > >   to behave the same as the majority implementation in respect of cookies
> > > 
> > > What this means is that we get to the point where all DMA engine drivers
> > > will hand out cookie value '2' as the first, and incrementing cookie
> > > values up to INT_MAX, returning to cookie '1' as the next cookie.
> > > 
> > > Think of this patch series as round 1...  I am hoping over time that more
> > > code can be consolidated between the DMA engine drivers and end up with a
> > > consistent way to handle various common themes in DMA engine hardware
> > > (like physical channel<->peripheral request signal selection.)
> > Thanks Russell,
> > 
> > I have tested this on atom today, and as expected works flawlessly :)
> > After all acks, I can merge or these can go thru your tree with my Ack.
> > Either way is okay.
> > 
> > I applied the v2 on a branch and also rebased on top of slave-dma.next.
> > There were few conflicts in imx-dma.c. Sacha, Javier, pls see that merge
> > is right.
> > 
> > This branch (rmk_cookie_fixes2_rebased) is not yet pushed, as I am not
> > able to connect to infradead.org, should be done when server is back.
> 
> Are you going to pick up Shawn Guo's tested-by for these patches, or are
> we saying its too late for that now?
Sure, his and others we have received on this series.
Also, IIRC there was one fixup from Jassi on pl330?

I should be able to merge this tomorrow, if thats fine with you.



-- 
~Vinod