linux-kernel - Re: [PATCHv4] DMAEngine: Define interleaved transfer request api

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Date:	Fri, 30 Sep 2011 21:31:28 +0530
From:	Jassi Brar <jaswinder.singh@...aro.org>
To:	Barry Song <21cnbao@...il.com>
Cc:	Vinod Koul <vinod.koul@...el.com>, linux-kernel@...r.kernel.org,
	dan.j.williams@...el.com, rmk@....linux.org.uk,
	DL-SHA-WorkGroupLinux <workgroup.linux@....com>
Subject: Re: [PATCHv4] DMAEngine: Define interleaved transfer request api

On 30 September 2011 12:13, Barry Song <21cnbao@...il.com> wrote:
>
> i support we can update dma_data_direction to:   MEM_TO_MEM,
> MEM_TO_DEV,  DEV_TO_MEM, DEV_TO_DEV.
>
So basically you are suggesting to replace 'enum dma_data_direction'
with 'enum xfer_direction'
I am not sure about that. I think they represent different things and
hence should be separate.
dma_data_direction tells the mapping of a buffer while the other
tells if the src and dst are memory or a device's FIFO.
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