[PATCH] Adding ADMA support for PPC460EX DMA engine.

Stefan Roese sr at denx.de
Fri Jul 23 16:15:14 EST 2010

Hi Marri,

On Friday 23 July 2010 02:57:18 tmarri at amcc.com wrote:
> From: Tirumala Marri <tmarri at amcc.com>
>   This patch will add ADMA support for DMA engine and HW offload for
>   XOR/ADG (RAID-5/6) functionalities.
>   1. It supports memcpy, xor, GF(2) based RAID-6.
>   2. It supports interrupt based DMA completions.
>   3. Also supports memcpy in RAID-1 case.
>   Kernel version: 2.6.35-rc5
>   Testing:
>     Created RAID-5/6 arrays usign mdadm.
>     And ran raw IO and filesystem IO to the RAID array.
>     Chunk size 4k,64k was tested.
>     RAID rebuild , disk fail, resync tested.
>   File names:
>     This code is similar to ppc440spe . So I named the files as
>     drivers/dma/ppc4xx/adma1.c and drivers/dma/ppc4xx/adma1.h

As you describe above, a lot of the code seems to be copied from 
drivers/dma/ppc4xx/adma.c/h. Wouldn't it make more sense to factor out the 
common code instead of duplicating it?


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