linux-kernel - Re: [RFC PATCH] nForce4 ADMA with NCQ: It's aliiiive..

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Message-ID: <4533B0B3.8070205@rtr.ca>
Date:	Mon, 16 Oct 2006 12:17:55 -0400
From:	Mark Lord <liml@....ca>
To:	Robert Hancock <hancockr@...w.ca>
Cc:	Jens Axboe <jens.axboe@...cle.com>,
	Allen Martin <AMartin@...dia.com>,
	Jeff Garzik <jeff@...zik.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org, prakash@...noor.de
Subject: Re: [RFC PATCH] nForce4 ADMA with NCQ: It's aliiiive..

Robert Hancock wrote:
> 
> I also noticed that I'm still using the default 64KB libata dma_boundary 
> value, this should be 4GB for ADMA mode (but fixed up back to the 
> default if an ATAPI device is connected, same as with the DMA mask).

Be careful of that.  The original PDC hardware for ADMA still had
the "don't cross a 64KB boundary" requirement.

Cheers

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