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drm/i915: Pin the ring high

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If we can use an unmappable ring, try to pin it out of the mappable
aperture. This simple layout preference is to try and keep the mappable
aperture reserved and available to handle GGTT mmapping requests from
userspace without causing evictions and GPU stalls.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180521082131.13744-4-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-05-21 09:21:31 +01:00
parent eb479f8639
commit 2edd4e698d
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/intel_ringbuffer.c
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@ -1034,6 +1034,8 @@ int intel_ring_pin(struct intel_ring *ring,
flags |= PIN_OFFSET_BIAS | offset_bias;
if (vma->obj->stolen)
flags |= PIN_MAPPABLE;
else
flags |= PIN_HIGH;
if (!(vma->flags & I915_VMA_GLOBAL_BIND)) {
if (flags & PIN_MAPPABLE || map == I915_MAP_WC)