[Mesa-dev] [PATCH] r600g: Take care of bo placement domains.

[Mathias Fröhlich]

Hi,

Attached is at patch described as follows:

For creating and reusing already existing buffer objects,
take care of the placement domains.
Have a little more finegrained usage to placement mapping.

This change does not account for the real location of the
buffer object for buffer objects returned from r600_bomgr.
But it greatly increases the probability to get buffers
that already have the desired placement.

This change avoids plenty of gpu uploads on command
stream emission. Which in turn avoids plenty of implicit
syncronization on the upload fences. Which, as a whole,
turns into a noticable performance gain.

Please review, apply, suggest improvements ...
Thanks
Mathias
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