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drm/i915: Unroll wrapping of the ringbuffer.

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The tail is quadword aligned, so we can add two MI_NOOP as a time.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Chris Wilson
2010-08-04 15:18:12 +01:00
committed by Eric Anholt
parent ae7d49d879
commit 1741dd4aa7
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/i915/intel_ringbuffer.c
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@ -682,9 +682,11 @@ int intel_wrap_ring_buffer(struct drm_device *dev,
} }
virt = (unsigned int *)(ring->virtual_start + ring->tail); virt = (unsigned int *)(ring->virtual_start + ring->tail);
rem /= 4; rem /= 8;
while (rem--) while (rem--) {
*virt++ = MI_NOOP; *virt++ = MI_NOOP;
*virt++ = MI_NOOP;
}
ring->tail = 0; ring->tail = 0;
ring->space = ring->head - 8; ring->space = ring->head - 8;