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drm/i915: Allocate rings from stolen 

If we have stolen available, make use of it for ringbuffer allocation.
Previously this was restricted to !llc platforms, as writing to stolen
requires a GGTT mapping - but now that we have partial mappable support,
the mappable aperture isn't quite so precious so we can use it more
freely and ringbuffers are a good user for the otherwise wasted stolen.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20160818161718.27187-18-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-08-18 17:16:57 +01:00
parent 9d80841ea4
commit c58b735fc7
1 changed files with 2 additions and 4 deletions
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6
drivers/gpu/drm/i915/intel_ringbuffer.c
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@ -1952,10 +1952,8 @@ intel_ring_create_vma(struct drm_i915_private *dev_priv, int size)
struct drm_i915_gem_object *obj; struct drm_i915_gem_object *obj;
struct i915_vma *vma; struct i915_vma *vma;
obj = ERR_PTR(-ENODEV); obj = i915_gem_object_create_stolen(&dev_priv->drm, size);
if (!HAS_LLC(dev_priv)) if (!obj)
obj = i915_gem_object_create_stolen(&dev_priv->drm, size);
if (IS_ERR(obj))
obj = i915_gem_object_create(&dev_priv->drm, size); obj = i915_gem_object_create(&dev_priv->drm, size);
if (IS_ERR(obj)) if (IS_ERR(obj))
return ERR_CAST(obj); return ERR_CAST(obj);