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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-11-19 00:17:47 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-11-19 01:33:49 +0300 |
| commit | 05c348377d90483f63362af3dc980d30fdc777be (patch) | |
| tree | 8f74cc48ec117a227596bcc291c9eba32c3f4a6d | |
| parent | a6a7cc4b7db6deaeca11cdd38844ea147a354c7a (diff) | |
| download | linux-05c348377d90483f63362af3dc980d30fdc777be.tar.xz | |
drm/i915: Skip final clflush if LLC is coherent
If the LLC is coherent with the object, we do not need to worry about
whether main memory and cache mismatch when we hand the object back to
the system.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161118211747.25197-2-chris@chris-wilson.co.uk
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index b6ad1bae5a15..902fa427c196 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -229,7 +229,8 @@ __i915_gem_object_release_shmem(struct drm_i915_gem_object *obj, if (obj->mm.madv == I915_MADV_DONTNEED) obj->mm.dirty = false; - if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0) + if ((obj->base.read_domains & I915_GEM_DOMAIN_CPU) == 0 && + !cpu_cache_is_coherent(obj->base.dev, obj->cache_level)) drm_clflush_sg(pages); obj->base.read_domains = I915_GEM_DOMAIN_CPU; |