From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> Now that i915 understands the caching modes behind PAT indices, we can refine the check in use_cpu_reloc() to not reject the uncached PAT if it was set by userspace. Instead it can decide based on the presence of full coherency which should be functionally equivalent on legacy platforms. We can ignore WT since it is only used by the display, and we can ignore Meteorlake since it will fail on the existing "has_llc" condition before the object cache mode check. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> Cc: Fei Yang <fei.yang@xxxxxxxxx> Cc: Matt Roper <matthew.d.roper@xxxxxxxxx> --- drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index 9d6e49c8a4c6..f74b33670bad 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -640,16 +640,9 @@ static inline int use_cpu_reloc(const struct reloc_cache *cache, if (DBG_FORCE_RELOC == FORCE_GTT_RELOC) return false; - /* - * For objects created by userspace through GEM_CREATE with pat_index - * set by set_pat extension, i915_gem_object_has_cache_level() always - * return true, otherwise the call would fall back to checking whether - * the object is un-cached. - */ return (cache->has_llc || obj->cache_dirty || - !(obj->pat_set_by_user || - i915_gem_object_has_cache_mode(obj, I915_CACHE_MODE_UC))); + i915_gem_object_has_cache_flag(obj, I915_CACHE_FLAG_COH2W)); } static int eb_reserve_vma(struct i915_execbuffer *eb, -- 2.39.2
