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drm/i915: extract __wait_seqno from i915_wait_request
i915_wait_request is actually a fairly large function encapsulating quite a few different operations. Because being able to wait on seqnos in various conditions is useful, extracting that bit of code to a helper function seems useful v2: pull the irq_get/put as well (Ben) Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -1819,6 +1819,36 @@ i915_gem_retire_work_handler(struct work_struct *work)
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mutex_unlock(&dev->struct_mutex);
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}
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static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno,
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bool interruptible)
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{
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drm_i915_private_t *dev_priv = ring->dev->dev_private;
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int ret = 0;
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if (i915_seqno_passed(ring->get_seqno(ring), seqno))
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return 0;
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trace_i915_gem_request_wait_begin(ring, seqno);
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if (WARN_ON(!ring->irq_get(ring)))
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return -ENODEV;
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#define EXIT_COND \
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(i915_seqno_passed(ring->get_seqno(ring), seqno) || \
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atomic_read(&dev_priv->mm.wedged))
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if (interruptible)
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ret = wait_event_interruptible(ring->irq_queue,
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EXIT_COND);
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else
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wait_event(ring->irq_queue, EXIT_COND);
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ring->irq_put(ring);
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trace_i915_gem_request_wait_end(ring, seqno);
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#undef EXIT_COND
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return ret;
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}
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/**
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* Waits for a sequence number to be signaled, and cleans up the
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* request and object lists appropriately for that event.
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@ -1861,24 +1891,7 @@ i915_wait_request(struct intel_ring_buffer *ring,
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seqno = request->seqno;
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}
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if (!i915_seqno_passed(ring->get_seqno(ring), seqno)) {
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trace_i915_gem_request_wait_begin(ring, seqno);
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if (WARN_ON(!ring->irq_get(ring)))
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return -ENODEV;
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if (dev_priv->mm.interruptible)
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ret = wait_event_interruptible(ring->irq_queue,
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i915_seqno_passed(ring->get_seqno(ring), seqno)
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|| atomic_read(&dev_priv->mm.wedged));
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else
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wait_event(ring->irq_queue,
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i915_seqno_passed(ring->get_seqno(ring), seqno)
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|| atomic_read(&dev_priv->mm.wedged));
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ring->irq_put(ring);
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trace_i915_gem_request_wait_end(ring, seqno);
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}
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ret = __wait_seqno(ring, seqno, dev_priv->mm.interruptible);
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if (atomic_read(&dev_priv->mm.wedged))
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ret = -EAGAIN;
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