Re: Re: [PATCH 11/12] mpc5121: Added MPC512x DMA driver.

[Hongjun Chen]

Hi John,

Did you use DMA driver in our FEC driver before?

Best Regards,



Hongjun Chen
2009-05-20



发件人： Piotr Zięcik
发送时间： 2009-05-19 16:05:05
收件人： Hongjun Chen
抄送： Wolfgang Denk; linuxppc-dev at ozlabs.org
主题： Re: [PATCH 11/12] mpc5121: Added MPC512x DMA driver.

Tuesday 19 May 2009 03:37:47 Hongjun Chen wrote:
> Since you have reuse most part of our BSP, why should you reinvent wheel
> for MPC512x DMA? We have one ready DMA driver, which has been used by AC97,
> ATA, VIU etc.
>

Answer is simple. The old one does not fit Linux DMA API. New one uses 
existing infrastructure which makes DMA engine aviable for existing consumers
in Linux kernel. For example network stack. Support for I/O  <- > memory 
transfers will be added when more consumers arrive.

-- 
Best Regards.
Piotr Zięcik
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