drm/i915: implement SNB workaround for lazy global gtt
authorDaniel Vetter <daniel.vetter@ffwll.ch>
Wed, 15 Feb 2012 22:50:23 +0000 (23:50 +0100)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Tue, 20 Mar 2012 20:53:55 +0000 (21:53 +0100)
commit149c84077fe717af883bae459623ef1cebd86388
treeef4072bc138e95a5411509dbb3538ba2de3e6840
parent74898d7edc701bdae3cbd099d783dfb80b42350f
drm/i915: implement SNB workaround for lazy global gtt

PIPE_CONTROL on snb needs global gtt mappings in place to workaround a
hw gotcha. No other commands need such a workaround. Luckily we can
detect a PIPE_CONTROL commands easily because they have a write_domain
= I915_GEM_DOMAIN_INSTRUCTION (and nothing else has that).

v2: Binding the target of such a reloc into the global gtt actually
works instead of binding the source, which is rather pointless ...

v3: Kill a superflous has_global_gtt_mapping assignement noticed by
Chris Wilson.

Reviewed-and-tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_gem_execbuffer.c