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drm/i915: Use cpu relocations if the object is in the GTT but not mappable 

This prevents the case of unbinding the object in order to process the
relocations through the GTT and then rebinding it only to then proceed
to use cpu relocations as the object is now in the CPU write domain. By
choosing to use cpu relocations up front, we can therefore avoid the
rebind penalty.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2012-08-23 13:12:52 +01:00 committed by Daniel Vetter
parent 0327d6ba99
commit 504c7267a1
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/i915/i915_gem_execbuffer.c
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@ -95,6 +95,7 @@ eb_destroy(struct eb_objects *eb)
static inline int use_cpu_reloc(struct drm_i915_gem_object *obj)
{
return (obj->base.write_domain == I915_GEM_DOMAIN_CPU ||
!obj->map_and_fenceable ||
obj->cache_level != I915_CACHE_NONE);
}