Re: [PATCH v7] dma: Add Xilinx AXI Direct Memory Access Engine driver support

From: Vinod Koul
Date: Sun Jun 28 2015 - 10:44:11 EST


On Sat, Jun 27, 2015 at 05:44:38PM +0300, Nicolae Rosia wrote:
> On Sat, Jun 27, 2015 at 5:40 PM, Vinod Koul <vinod.koul@xxxxxxxxx> wrote:
> [...]
> >> Please let me know if you are not clear.
> > No sorry am not...
> >
> > I asked how the device address in configured. For both MM2S S2MM you are
> > using sg for memory address, where are you getting device adress, are you
> > assuming/hardcoding or getting somehow, if so how?
> As the name says, one end is memory (MM) and the other end is an AXI4
> Stream Bus (S) which has no concept of memory address.
> So yes, it is hardcoded at design time.
So where does the data go at the end of stream bus, who configures that?
Shouldnt all this be at least documented...

--
~Vinod
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/