linux-kernel - Re: Setting up Silicon image 3114 in DMA mode

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Message-ID: <4C2BE243.5040308@garzik.org>
Date:	Wed, 30 Jun 2010 20:33:07 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	amruth pattanada <amruth.vamadev@...il.com>
CC:	Robert Hancock <hancockrwd@...il.com>, linux-ide@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Setting up Silicon image 3114 in DMA mode

On 06/30/2010 08:30 AM, amruth pattanada wrote:
> Hi
> I need some clarification regarding read DMA data from silicon image
> controller. How do know that DMA transfer happened and where to look
> for the data after the transfer. Should we look at BAR2 channel X Task
> file register data word or look into allocated DMA buffer which is
> specified in the PRD table. I am reading 0x00 in the PRD table scatter
> gather list and it hangs in the when I tried to read data word of
> channel task file register. Please let me know how to read data buffer
> after the DMA is complete.

Teaching you how to write a non-Linux driver is outside the scope of 
linux-ide and linux-kernel.  This information is covered by the freely 
available Silicon Image documentation, and SiI support should be able to 
assist you further beyond that.

	Jeff



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