[Intel-gfx] [RFC] non-blocking map

[Ben Widawsky]

On Fri, Aug 12, 2011 at 04:28:17PM -0700, Eric Anholt wrote:
> On Thu, 11 Aug 2011 18:19:40 -0700, Ben Widawsky <ben at bwidawsk.net> wrote:
> Non-text part: multipart/mixed
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> > On Thu, Aug 11, 2011 at 05:56:21PM -0700, Keith Packard wrote:
> > > On Thu, 11 Aug 2011 17:47:24 -0700, Ben Widawsky <ben at bwidawsk.net> wrote:
> > > 
> > > > These are dirty hacks just to enable testing write only non-blocking
> > > > maps. I haven't yet created a good test, but maybe someone can shoot
> > > > this down before I waste more time :).
> > > 
> > > What's the planned usage?
> > 
> > It's supposed to speed up things like map_range_buffer which tend to do
> > write only operations and shouldn't have to do a blocking set domain for
> > write only actions (read only from GPU).
> 
> I think for write-only ARB_mbr we want to be using GTT mappings, not CPU
> mappings.

I'm also planning to do this for GTT mappings, but that was harder and I
thought this might also be of some benefit.
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