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

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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
negligible, as all the requests will be considered completed by this
point, it just brings the HWS into line with expectations for external
viewers.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460010558-10705-2-git-send-email-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-04-07 07:29:11 +01:00
parent 14fd0d6d0b
commit 2ed53a94d8
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_gem.c
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@ -2882,6 +2882,8 @@ static void i915_gem_reset_engine_cleanup(struct drm_i915_private *dev_priv,
buffer->last_retired_head = buffer->tail;
intel_ring_update_space(buffer);
}
intel_ring_init_seqno(engine, engine->last_submitted_seqno);
}
void i915_gem_reset(struct drm_device *dev)