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List:       freedesktop-xorg
Subject:    Re: EXA for radeon experimental patch
From:       Michel =?ISO-8859-1?Q?D=E4nzer?= <michel () daenzer ! net>
Date:       2005-09-01 21:16:00
Message-ID: 1125609361.23262.98.camel () localhost
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On Thu, 2005-09-01 at 11:35 +0200, Lars Knoll wrote:
> 
> Even if the card doesn't have scatter/gather support, drm allows you to 
> allocate a piece of consistent physical ram, and mmap it in the server. 
> The handle you get is the physical address, so you should be able to use 
> that to implement PCI dma transfers.

Are you sure about that, in particular on a 64 bit system? The handle
may coincide with the physical address in a lot of cases, but I didn't
think that was guaranteed.


-- 
Earthling Michel Dänzer      |     Debian (powerpc), X and DRI developer
Libre software enthusiast    |   http://svcs.affero.net/rm.php?r=daenzer


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