[patch V2 0/6] dma: edma: Provide granular residue accounting

Vinod Koul vinod.koul at intel.com
Tue Apr 29 01:46:35 PDT 2014

On Mon, Apr 28, 2014 at 03:47:37PM -0500, Joel Fernandes wrote:
> On 04/28/2014 05:49 AM, Thomas Gleixner wrote:
> > A simpler version to provide granular residue accounting and readout
> > for EDMA.
> > 
> > Delta to V1:
> > 
> >       - Removed the double read of the address in PaRAM
> > 
> >       - Simplified the stats update in the interrupt callback for
> >         intermediate transfers
> > 
> > Thanks,
> > 
> > 	tglx
> > 
> Thanks for the series. I went over all the patches and it looks great.
> Acked-by: Joel Fernandes <joelf at ti.com>
> The patches however didn't apply and had some conflicts with my dma
> memcpy series and peter's cyclic series so I resolved conflicts and
> created a single branch based on Vinod's slave-dma next branch (commit
> 406efb1a745c1dc512dc9c3c859e302e7b7f907e) that Vinod can pull.
> I also renamed subject line of patches in Thomas's series to be
> "dmaengine: edma" and documented some of the variables used.
> https://github.com/joelagnel/linux-kernel.git (for-vinod branch)
> Vinod, could you pull if it looks OK?

The patches look good.

commit 770f0f3a20188b7e17db2790803b9da925dc0b94
Author: Thomas Gleixner <tglx at linutronix.de>
Date:   Mon Apr 28 10:49:43 2014 +0000

    dmaengine: edma: Make reading the position of active channels work

    As Joel pointed out, edma_read_position() uses memcpy_fromio() to read
    the parameter ram. That's not synchronized with the internal update as
    it does a byte by byte copy. We need to do a 32bit read to get a
    consistent value.

    Further reading destination and source is pointless. In DEV_TO_MEM
    transfers we are only interested in the destination, in MEM_TO_DEV we
    care about the source. In MEM_TO_MEM it really does not matter which
    one you read.

    Simple solution: Remove the pointers, select dest/source via a bool
    and return the read value.

    Remove the export of this function while at it. The only potential
    user is the dmaengine and that's always builtin.

    Signed-off-by: Thomas Gleixner <tglx at linutronix.de>

You s-o-b missing in this one, also ack from Sekhar missing. Do you want to redo
this or prefer me to cherry-pick patches adding acks and your s-o-b, since I
already fetched your branch

Either way is fine with me...


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