diff mbox

[12/22] drm/i915: Allocate rings from stolen

Message ID 1471344168-28136-13-git-send-email-chris@chris-wilson.co.uk (mailing list archive)
State New, archived
Headers show

Commit Message

Chris Wilson Aug. 16, 2016, 10:42 a.m. UTC
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>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Comments

Joonas Lahtinen Aug. 16, 2016, 11:47 a.m. UTC | #1
On ti, 2016-08-16 at 11:42 +0100, Chris Wilson wrote:
> @@ -1949,10 +1949,8 @@ intel_ring_create_vma(struct drm_i915_private *dev_priv, int size)
>  	struct drm_i915_gem_object *obj;
>  	struct i915_vma *vma;
>  
> -	obj = ERR_PTR(-ENODEV);
> -	if (!HAS_LLC(dev_priv))
> -		obj = i915_gem_object_create_stolen(&dev_priv->drm, size);
> -	if (IS_ERR(obj))

This previous test should have been IS_ERR_OR_NULL() causing the
fallback to normal path has not worked on LLC platforms.

> +	obj = i915_gem_object_create_stolen(&dev_priv->drm, size);
> +	if (obj == NULL)

!obj

Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

Regards, Joonas
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index a96a470dfe03..5a5412f3db46 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1949,10 +1949,8 @@  intel_ring_create_vma(struct drm_i915_private *dev_priv, int size)
 	struct drm_i915_gem_object *obj;
 	struct i915_vma *vma;
 
-	obj = ERR_PTR(-ENODEV);
-	if (!HAS_LLC(dev_priv))
-		obj = i915_gem_object_create_stolen(&dev_priv->drm, size);
-	if (IS_ERR(obj))
+	obj = i915_gem_object_create_stolen(&dev_priv->drm, size);
+	if (obj == NULL)
 		obj = i915_gem_object_create(&dev_priv->drm, size);
 	if (IS_ERR(obj))
 		return ERR_CAST(obj);