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[15/15] drm/i915: On GPU reset, set the HWS breadcrumb to the last seqno

Message ID 1448786893-2522-16-git-send-email-chris@chris-wilson.co.uk
State New, archived
Headers show

Commit Message

Chris Wilson Nov. 29, 2015, 8:48 a.m. UTC
After the GPU reset and we discard all of the incomplete requests, mark
the GPU as having advanced to the last_submitted_seqno (as having
completed the requests and ready for fresh work). The impact of this is
negligble, as all the requests will be considered completed by this
point, it just brings the HWS into line with expectations for external

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
 drivers/gpu/drm/i915/i915_gem.c | 2 ++
 1 file changed, 2 insertions(+)
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diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 871201713c73..f82ee12c9492 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2793,6 +2793,8 @@  static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv,
 		buffer->last_retired_head = buffer->tail;
+	intel_ring_init_seqno(ring, ring->last_submitted_seqno);
 void i915_gem_reset(struct drm_device *dev)