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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>
This commit is contained in:
Ben Widawsky 2012-04-26 16:03:03 -07:00 committed by Daniel Vetter
parent c58cf4f108
commit 604dd3ec75
1 changed files with 31 additions and 18 deletions
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49
drivers/gpu/drm/i915/i915_gem.c
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@ -1819,6 +1819,36 @@ i915_gem_retire_work_handler(struct work_struct *work)
mutex_unlock(&dev->struct_mutex);
}
static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno,
bool interruptible)
{
drm_i915_private_t *dev_priv = ring->dev->dev_private;
int ret = 0;
if (i915_seqno_passed(ring->get_seqno(ring), seqno))
return 0;
trace_i915_gem_request_wait_begin(ring, seqno);
if (WARN_ON(!ring->irq_get(ring)))
return -ENODEV;
#define EXIT_COND \
(i915_seqno_passed(ring->get_seqno(ring), seqno) || \
atomic_read(&dev_priv->mm.wedged))
if (interruptible)
ret = wait_event_interruptible(ring->irq_queue,
EXIT_COND);
else
wait_event(ring->irq_queue, EXIT_COND);
ring->irq_put(ring);
trace_i915_gem_request_wait_end(ring, seqno);
#undef EXIT_COND
return ret;
}
/**
* Waits for a sequence number to be signaled, and cleans up the
* request and object lists appropriately for that event.
@ -1861,24 +1891,7 @@ i915_wait_request(struct intel_ring_buffer *ring,
seqno = request->seqno;
}
if (!i915_seqno_passed(ring->get_seqno(ring), seqno)) {
trace_i915_gem_request_wait_begin(ring, seqno);
if (WARN_ON(!ring->irq_get(ring)))
return -ENODEV;
if (dev_priv->mm.interruptible)
ret = wait_event_interruptible(ring->irq_queue,
i915_seqno_passed(ring->get_seqno(ring), seqno)
|| atomic_read(&dev_priv->mm.wedged));
else
wait_event(ring->irq_queue,
i915_seqno_passed(ring->get_seqno(ring), seqno)
|| atomic_read(&dev_priv->mm.wedged));
ring->irq_put(ring);
trace_i915_gem_request_wait_end(ring, seqno);
}
ret = __wait_seqno(ring, seqno, dev_priv->mm.interruptible);
if (atomic_read(&dev_priv->mm.wedged))
ret = -EAGAIN;