drm/i915: Remove vestigal DRI1 ring quiescing code
After the removal of DRI1, all access to the rings are through requests
and so we can always be sure that there is a request to wait upon to
free up available space. The fallback code only existed so that we could
quiesce the GPU following unmediated access by DRI1.
v2: Rebase
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 1f9463a..720d29a 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2060,7 +2060,7 @@
ring->buffer = NULL;
}
-static int intel_ring_wait_request(struct intel_engine_cs *ring, int n)
+static int ring_wait_for_space(struct intel_engine_cs *ring, int n)
{
struct intel_ringbuffer *ringbuf = ring->buffer;
struct drm_i915_gem_request *request;
@@ -2076,7 +2076,7 @@
break;
}
- if (&request->list == &ring->request_list)
+ if (WARN_ON(&request->list == &ring->request_list))
return -ENOSPC;
ret = i915_wait_request(request);
@@ -2090,58 +2090,6 @@
return 0;
}
-static int ring_wait_for_space(struct intel_engine_cs *ring, int n)
-{
- struct drm_device *dev = ring->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_ringbuffer *ringbuf = ring->buffer;
- unsigned long end;
- int ret;
-
- ret = intel_ring_wait_request(ring, n);
- if (ret != -ENOSPC)
- return ret;
-
- /* force the tail write in case we have been skipping them */
- __intel_ring_advance(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
- * timers don't work yet, so prevent a complete hang in that
- * case by choosing an insanely large timeout. */
- end = jiffies + 60 * HZ;
-
- ret = 0;
- trace_i915_ring_wait_begin(ring);
- do {
- if (intel_ring_space(ringbuf) >= n)
- break;
- ringbuf->head = I915_READ_HEAD(ring);
- if (intel_ring_space(ringbuf) >= n)
- break;
-
- 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)
- break;
-
- if (time_after(jiffies, end)) {
- ret = -EBUSY;
- break;
- }
- } while (1);
- trace_i915_ring_wait_end(ring);
- return ret;
-}
-
static int intel_wrap_ring_buffer(struct intel_engine_cs *ring)
{
uint32_t __iomem *virt;