[Intel-gfx] [PATCH] drm/i915: Remove redundant i915_request_await_object in blit clears

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

One i915_request_await_object is enough and we keep the one under the
object lock so it is final.

At the same time move async clflushing setup under the same locked
section and consolidate common code into a helper function.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Matthew Auld <matthew.auld at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Michael J. Ruhl <michael.j.ruhl at intel.com>
---
 .../gpu/drm/i915/gem/i915_gem_object_blt.c    | 35 +++++++------------
 1 file changed, 13 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
index f457d7130491..7d8b396e265a 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
@@ -126,6 +126,17 @@ void intel_emit_vma_release(struct intel_context *ce, struct i915_vma *vma)
 	intel_engine_pm_put(ce->engine);
 }
 
+static int
+move_obj_to_gpu(struct drm_i915_gem_object *obj,
+		struct i915_request *rq,
+		bool write)
+{
+	if (obj->cache_dirty & ~obj->cache_coherent)
+		i915_gem_clflush_object(obj, 0);
+
+	return i915_request_await_object(rq, obj, write);
+}
+
 int i915_gem_object_fill_blt(struct drm_i915_gem_object *obj,
 			     struct intel_context *ce,
 			     u32 value)
@@ -143,12 +154,6 @@ int i915_gem_object_fill_blt(struct drm_i915_gem_object *obj,
 	if (unlikely(err))
 		return err;
 
-	if (obj->cache_dirty & ~obj->cache_coherent) {
-		i915_gem_object_lock(obj);
-		i915_gem_clflush_object(obj, 0);
-		i915_gem_object_unlock(obj);
-	}
-
 	batch = intel_emit_vma_fill_blt(ce, vma, value);
 	if (IS_ERR(batch)) {
 		err = PTR_ERR(batch);
@@ -165,10 +170,6 @@ int i915_gem_object_fill_blt(struct drm_i915_gem_object *obj,
 	if (unlikely(err))
 		goto out_request;
 
-	err = i915_request_await_object(rq, obj, true);
-	if (unlikely(err))
-		goto out_request;
-
 	if (ce->engine->emit_init_breadcrumb) {
 		err = ce->engine->emit_init_breadcrumb(rq);
 		if (unlikely(err))
@@ -176,7 +177,7 @@ int i915_gem_object_fill_blt(struct drm_i915_gem_object *obj,
 	}
 
 	i915_vma_lock(vma);
-	err = i915_request_await_object(rq, vma->obj, true);
+	err = move_obj_to_gpu(vma->obj, rq, true);
 	if (err == 0)
 		err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
 	i915_vma_unlock(vma);
@@ -317,16 +318,6 @@ struct i915_vma *intel_emit_vma_copy_blt(struct intel_context *ce,
 	return ERR_PTR(err);
 }
 
-static int move_to_gpu(struct i915_vma *vma, struct i915_request *rq, bool write)
-{
-	struct drm_i915_gem_object *obj = vma->obj;
-
-	if (obj->cache_dirty & ~obj->cache_coherent)
-		i915_gem_clflush_object(obj, 0);
-
-	return i915_request_await_object(rq, obj, write);
-}
-
 int i915_gem_object_copy_blt(struct drm_i915_gem_object *src,
 			     struct drm_i915_gem_object *dst,
 			     struct intel_context *ce)
@@ -375,7 +366,7 @@ int i915_gem_object_copy_blt(struct drm_i915_gem_object *src,
 		goto out_request;
 
 	for (i = 0; i < ARRAY_SIZE(vma); i++) {
-		err = move_to_gpu(vma[i], rq, i);
+		err = move_obj_to_gpu(vma[i]->obj, rq, i);
 		if (unlikely(err))
 			goto out_unlock;
 	}
-- 
2.20.1