drm/i915: implement SNB workaround for lazy global gtt

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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>

...

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Daniel Vetter 2012-02-15 23:50:23 +01:00

parent 74898d7edc

commit 149c84077f

1 changed files with 13 additions and 1 deletions

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drivers/gpu/drm/i915/i915_gem_execbuffer.c

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