[PATCH 51/51] drm/i915: Remove the now obsolete 'outstanding_lazy_request'

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From: John Harrison <John.C.Harrison@xxxxxxxxx>

The outstanding_lazy_request is no longer used anywhere in the driver.
Everything that was looking at it now has a request explicitly passed in from on
high. Everything that was relying upon behind the scenes is now explicitly
creating/passing/submitting it's own private request. Thus the OLR can be
removed.

For: VIZ-5115
Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_gem.c            |   16 +---------------
 drivers/gpu/drm/i915/i915_gem_execbuffer.c |    4 +---
 drivers/gpu/drm/i915/intel_lrc.c           |    6 ++----
 drivers/gpu/drm/i915/intel_ringbuffer.c    |   17 ++---------------
 drivers/gpu/drm/i915/intel_ringbuffer.h    |    4 ----
 5 files changed, 6 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 4777eb2..8febd58 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1155,15 +1155,9 @@ i915_gem_check_wedge(struct i915_gpu_error *error,
 int
 i915_gem_check_olr(struct drm_i915_gem_request *req)
 {
-	int ret;
-
 	WARN_ON(!mutex_is_locked(&req->ring->dev->struct_mutex));
 
-	ret = 0;
-	if (req == req->ring->outstanding_lazy_request)
-		ret = i915_add_request(req);
-
-	return ret;
+	return 0;
 }
 
 static void fake_irq(unsigned long data)
@@ -2423,8 +2417,6 @@ int __i915_add_request(struct drm_i915_gem_request *request,
 	dev_priv = ring->dev->dev_private;
 	ringbuf = request->ringbuf;
 
-	WARN_ON(request != ring->outstanding_lazy_request);
-
 	request_start = intel_ring_get_tail(ringbuf);
 	/*
 	 * Emit any outstanding flushes - execbuf can fail to emit the flush
@@ -2483,7 +2475,6 @@ int __i915_add_request(struct drm_i915_gem_request *request,
 	}
 
 	trace_i915_gem_request_add(request);
-	ring->outstanding_lazy_request = NULL;
 
 	i915_queue_hangcheck(ring->dev);
 
@@ -2667,9 +2658,6 @@ static void i915_gem_reset_ring_cleanup(struct drm_i915_private *dev_priv,
 
 		i915_gem_free_request(request);
 	}
-
-	/* This may not have been flushed before the reset, so clean it now */
-	i915_gem_request_assign(&ring->outstanding_lazy_request, NULL);
 }
 
 void i915_gem_restore_fences(struct drm_device *dev)
@@ -3119,8 +3107,6 @@ int i915_gpu_idle(struct drm_device *dev)
 			}
 		}
 
-		WARN_ON(ring->outstanding_lazy_request);
-
 		ret = intel_ring_idle(ring);
 		if (ret)
 			return ret;
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 6a703e6..0eae592 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1571,10 +1571,8 @@ err:
 	 * must be freed again. If it was submitted then it is being tracked
 	 * on the active request list and no clean up is required here.
 	 */
-	if (ret && params->request) {
+	if (ret && params->request)
 		i915_gem_request_unreference(params->request);
-		ring->outstanding_lazy_request = NULL;
-	}
 
 	mutex_unlock(&dev->struct_mutex);
 
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index c5408bc..1e23702 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -855,8 +855,7 @@ int intel_logical_ring_alloc_request(struct intel_engine_cs *ring,
 	if (!req_out)
 		return -EINVAL;
 
-	if ((*req_out = ring->outstanding_lazy_request) != NULL)
-		return 0;
+	*req_out = NULL;
 
 	request = kzalloc(sizeof(*request), GFP_KERNEL);
 	if (request == NULL)
@@ -890,7 +889,7 @@ int intel_logical_ring_alloc_request(struct intel_engine_cs *ring,
 	i915_gem_context_reference(request->ctx);
 	request->ringbuf = ctx->engine[ring->id].ringbuf;
 
-	*req_out = ring->outstanding_lazy_request = request;
+	*req_out = request;
 	return 0;
 }
 
@@ -1346,7 +1345,6 @@ void intel_logical_ring_cleanup(struct intel_engine_cs *ring)
 
 	intel_logical_ring_stop(ring);
 	WARN_ON((I915_READ_MODE(ring) & MODE_IDLE) == 0);
-	i915_gem_request_assign(&ring->outstanding_lazy_request, NULL);
 
 	if (ring->cleanup)
 		ring->cleanup(ring);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 9b4cf99..1cbde62 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1955,7 +1955,6 @@ void intel_cleanup_ring_buffer(struct intel_engine_cs *ring)
 
 	intel_unpin_ringbuffer_obj(ringbuf);
 	intel_destroy_ringbuffer_obj(ringbuf);
-	i915_gem_request_assign(&ring->outstanding_lazy_request, NULL);
 
 	if (ring->cleanup)
 		ring->cleanup(ring);
@@ -2074,15 +2073,6 @@ static int intel_wrap_ring_buffer(struct intel_engine_cs *ring)
 int intel_ring_idle(struct intel_engine_cs *ring)
 {
 	struct drm_i915_gem_request *req;
-	int ret;
-
-	/* We need to add any requests required to flush the objects and ring */
-	WARN_ON(ring->outstanding_lazy_request);
-	if (ring->outstanding_lazy_request) {
-		ret = i915_add_request(ring->outstanding_lazy_request);
-		if (ret)
-			return ret;
-	}
 
 	/* Wait upon the last request to be completed */
 	if (list_empty(&ring->request_list))
@@ -2107,8 +2097,7 @@ intel_ring_alloc_request(struct intel_engine_cs *ring,
 	if (!req_out)
 		return -EINVAL;
 
-	if ((*req_out = ring->outstanding_lazy_request) != NULL)
-		return 0;
+	*req_out = NULL;
 
 	request = kzalloc(sizeof(*request), GFP_KERNEL);
 	if (request == NULL)
@@ -2127,7 +2116,7 @@ intel_ring_alloc_request(struct intel_engine_cs *ring,
 		return ret;
 	}
 
-	*req_out = ring->outstanding_lazy_request = request;
+	*req_out = request;
 	return 0;
 }
 
@@ -2202,8 +2191,6 @@ void intel_ring_init_seqno(struct intel_engine_cs *ring, u32 seqno)
 	struct drm_device *dev = ring->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	BUG_ON(ring->outstanding_lazy_request);
-
 	if (INTEL_INFO(dev)->gen == 6 || INTEL_INFO(dev)->gen == 7) {
 		I915_WRITE(RING_SYNC_0(ring->mmio_base), 0);
 		I915_WRITE(RING_SYNC_1(ring->mmio_base), 0);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index e20ba9e..6af5e5e 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -258,10 +258,6 @@ struct  intel_engine_cs {
 	 */
 	struct list_head request_list;
 
-	/**
-	 * Do we have some not yet emitted requests outstanding?
-	 */
-	struct drm_i915_gem_request *outstanding_lazy_request;
 	bool gpu_caches_dirty;
 	bool fbc_dirty;
 
-- 
1.7.9.5

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