linux-kernel - [RFC] AGP initial support for chipset flushing..

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Message-ID: <Pine.LNX.4.64.0710290811070.1170@skynet.skynet.ie>
Date:	Mon, 29 Oct 2007 08:15:54 +0000 (GMT)
From:	Dave Airlie <airlied@...net.ie>
To:	linux-kernel@...r.kernel.org, dri-devel@...ts.sf.net
cc:	keithp@...thp.com
Subject: [RFC] AGP initial support for chipset flushing..

Hi,

We've uncovered a need when using the new memory manager to flush the 
chipset global write buffers on certain intel chipset due to a lack of 
coherency..

The attached patches add a new AGP interface  for this purpose and 
implements this in the Intel AGP driver. This stuff is based of some 
guesswork in the 915 case from comments in the documentation :).

Unfortuantely the 965 BIOS doesn't set this stuff up properly and it 
doesn't use a standard BAR address, so I have to do it by hand, I'd 
appreciate any commentary particularly in the setting up of the resource 
stuff.

Regards,
Dave.
View attachment "0001-agp-add-chipset-flushing-support-to-AGP-interface.patch" of type "TEXT/x-diff" (6128 bytes)

View attachment "0002-intel-agp-add-chipset-flushing-support.patch" of type "TEXT/x-diff" (6440 bytes)