[PATCH 51/81] drm/i915: Remove the identical implementations of request space reservation

[Chris Wilson]

Now that we share intel_ring_begin(), reserving space for the tail of
the request is identical between legacy/execlists and so the tautology
can be removed.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem_request.c |  7 +++----
 drivers/gpu/drm/i915/intel_lrc.c        | 15 ---------------
 drivers/gpu/drm/i915/intel_lrc.h        |  1 -
 drivers/gpu/drm/i915/intel_ringbuffer.c | 15 ---------------
 drivers/gpu/drm/i915/intel_ringbuffer.h |  3 ---
 5 files changed, 3 insertions(+), 38 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c
index 8f18c66f480c..bae96d50a2bd 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/i915_gem_request.c
@@ -250,10 +250,9 @@ static int __i915_gem_request_alloc(struct intel_engine_cs *engine,
 	 * to be redone if the request is not actually submitted straight
 	 * away, e.g. because a GPU scheduler has deferred it.
 	 */
-	if (i915.enable_execlists)
-		ret = intel_logical_ring_reserve_space(req);
-	else
-		ret = intel_ring_reserve_space(req);
+	intel_ring_reserved_space_reserve(req->ringbuf,
+					  MIN_SPACE_FOR_ADD_REQUEST);
+	ret = intel_ring_begin(req, 0);
 	if (ret) {
 		/*
 		 * At this point, the request is fully allocated even if not
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index b8ad285d460e..6c8242a5a5c3 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -775,21 +775,6 @@ intel_logical_ring_advance_and_submit(struct drm_i915_gem_request *request)
 	return 0;
 }
 
-int intel_logical_ring_reserve_space(struct drm_i915_gem_request *request)
-{
-	/*
-	 * The first call merely notes the reserve request and is common for
-	 * all back ends. The subsequent localised _begin() call actually
-	 * ensures that the reservation is available. Without the begin, if
-	 * the request creator immediately submitted the request without
-	 * adding any commands to it then there might not actually be
-	 * sufficient room for the submission commands.
-	 */
-	intel_ring_reserved_space_reserve(request->ringbuf, MIN_SPACE_FOR_ADD_REQUEST);
-
-	return intel_ring_begin(request, 0);
-}
-
 /**
  * execlists_submission() - submit a batchbuffer for execution, Execlists style
  * @dev: DRM device.
diff --git a/drivers/gpu/drm/i915/intel_lrc.h b/drivers/gpu/drm/i915/intel_lrc.h
index 61cc9a1feb9f..cfbc5a1bc97b 100644
--- a/drivers/gpu/drm/i915/intel_lrc.h
+++ b/drivers/gpu/drm/i915/intel_lrc.h
@@ -59,7 +59,6 @@
 
 /* Logical Rings */
 int intel_logical_ring_alloc_request_extras(struct drm_i915_gem_request *request);
-int intel_logical_ring_reserve_space(struct drm_i915_gem_request *request);
 void intel_logical_ring_stop(struct intel_engine_cs *engine);
 void intel_logical_ring_cleanup(struct intel_engine_cs *engine);
 int intel_logical_rings_init(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 75f309b5a9a2..ea80e14f909b 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2112,21 +2112,6 @@ int intel_ring_alloc_request_extras(struct drm_i915_gem_request *request)
 	return 0;
 }
 
-int intel_ring_reserve_space(struct drm_i915_gem_request *request)
-{
-	/*
-	 * The first call merely notes the reserve request and is common for
-	 * all back ends. The subsequent localised _begin() call actually
-	 * ensures that the reservation is available. Without the begin, if
-	 * the request creator immediately submitted the request without
-	 * adding any commands to it then there might not actually be
-	 * sufficient room for the submission commands.
-	 */
-	intel_ring_reserved_space_reserve(request->ringbuf, MIN_SPACE_FOR_ADD_REQUEST);
-
-	return intel_ring_begin(request, 0);
-}
-
 void intel_ring_reserved_space_reserve(struct intel_ringbuffer *ringbuf, int size)
 {
 	GEM_BUG_ON(ringbuf->reserved_size);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index db49a210b951..57d8c50f6901 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -530,9 +530,6 @@ void intel_ring_reserved_space_use(struct intel_ringbuffer *ringbuf);
 /* Finish with the reserved space - for use by i915_add_request() only. */
 void intel_ring_reserved_space_end(struct intel_ringbuffer *ringbuf);
 
-/* Legacy ringbuffer specific portion of reservation code: */
-int intel_ring_reserve_space(struct drm_i915_gem_request *request);
-
 /* intel_breadcrumbs.c -- user interrupt bottom-half for waiters */
 struct intel_wait {
 	struct rb_node node;
-- 
2.8.0.rc3