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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2014-05-05 09:07:32 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-05-08 01:22:34 +0200 |
| commit | dcfe050659bbd02e3b18d4b19eb0bcc8d0072bb0 (patch) | |
| tree | 66adfd32356caa8db06641345519b51c7ee5c21b /drivers/gpu/drm/i915/intel_ringbuffer.c | |
| parent | 6e7186af3b815adda710ee8b4a6f1402776661c0 (diff) | |
| download | op-kernel-dev-dcfe050659bbd02e3b18d4b19eb0bcc8d0072bb0.zip op-kernel-dev-dcfe050659bbd02e3b18d4b19eb0bcc8d0072bb0.tar.gz | |
drm/i915: Improve fallback ring waiting
A few improvements to the fallback method for waiting upon ring space:
1. Fix the start/end wait tracepoints to always be paired.
2. Increase responsiveness of checking
3. Mark the process as waiting upon io
4. Check for signal interruptions
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com>
[danvet: Drop the s/msleep/io_schedule_timeout/ change again since the
latter isn't exported.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 40a7aa4..e6c7a4d 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1546,7 +1546,6 @@ static int ring_wait_for_space(struct intel_ring_buffer *ring, int n) /* force the tail write in case we have been skipping them */ __intel_ring_advance(ring); - trace_i915_ring_wait_begin(ring); /* With GEM the hangcheck timer should kick us out of the loop, * leaving it early runs the risk of corrupting GEM state (due * to running on almost untested codepaths). But on resume @@ -1554,12 +1553,13 @@ static int ring_wait_for_space(struct intel_ring_buffer *ring, int n) * case by choosing an insanely large timeout. */ end = jiffies + 60 * HZ; + trace_i915_ring_wait_begin(ring); do { ring->head = I915_READ_HEAD(ring); ring->space = ring_space(ring); if (ring->space >= n) { - trace_i915_ring_wait_end(ring); - return 0; + ret = 0; + break; } if (!drm_core_check_feature(dev, DRIVER_MODESET) && @@ -1571,13 +1571,23 @@ static int ring_wait_for_space(struct intel_ring_buffer *ring, int n) msleep(1); + if (dev_priv->mm.interruptible && signal_pending(current)) { + ret = -ERESTARTSYS; + break; + } + ret = i915_gem_check_wedge(&dev_priv->gpu_error, dev_priv->mm.interruptible); if (ret) - return ret; - } while (!time_after(jiffies, end)); + break; + + if (time_after(jiffies, end)) { + ret = -EBUSY; + break; + } + } while (1); trace_i915_ring_wait_end(ring); - return -EBUSY; + return ret; } static int intel_wrap_ring_buffer(struct intel_ring_buffer *ring) |
