EXA for radeon experimental patch
michel at daenzer.net
Thu Sep 1 14:16:00 PDT 2005
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
More information about the xorg