diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2012-12-10 13:56:17 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-12-11 14:07:03 +0100 |
| commit | 107f27a5df8ad33a351d6e82fe95ff92b428f72e (patch) | |
| tree | ccd84f630417e15b62bd985785cf9b55058586c3 | |
| parent | f72b3435c1a75406d82d6e252bb78f009efd4bd9 (diff) | |
drm/i915: Open-code i915_gpu_idle() for handling seqno wrapping
The complication is that during seqno wrapping we must be extremely
careful not to write to any ring as that will require a new seqno, and
so would recurse back into the seqno wrap handler. So we cannot call
i915_gpu_idle() as that does additional work beyond simply retiring the
current set of requests, and instead must do the minimal work ourselves
during seqno wrapping.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index a81b78a59bd..bc73f98c363 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1938,11 +1938,15 @@ i915_gem_handle_seqno_wrap(struct drm_device *dev) if (ret == 0) return ret; - ret = i915_gpu_idle(dev); - if (ret) - return ret; - + /* Carefully retire all requests without writing to the rings */ + for_each_ring(ring, dev_priv, i) { + ret = intel_ring_idle(ring); + if (ret) + return ret; + } i915_gem_retire_requests(dev); + + /* Finally reset hw state */ for_each_ring(ring, dev_priv, i) { ret = intel_ring_handle_seqno_wrap(ring); if (ret) |