drm/i915: Move common scratch allocation/destroy to intel_engine_cs.c

Since the scratch allocation and cleanup is shared by all engine
submission backends, move it out of the legacy intel_ringbuffer.c and
into the new home for common routines, intel_engine_cs.c

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1471254551-25805-20-git-send-email-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/intel_engine_cs.c

@@ -195,6 +195,54 @@ void intel_engine_setup_common(struct intel_engine_cs *engine)
 	i915_gem_batch_pool_init(engine, &engine->batch_pool);
 }
 
+int intel_engine_create_scratch(struct intel_engine_cs *engine, int size)
+{
+	struct drm_i915_gem_object *obj;
+	struct i915_vma *vma;
+	int ret;
+
+	WARN_ON(engine->scratch);
+
+	obj = i915_gem_object_create_stolen(&engine->i915->drm, size);
+	if (!obj)
+		obj = i915_gem_object_create(&engine->i915->drm, size);
+	if (IS_ERR(obj)) {
+		DRM_ERROR("Failed to allocate scratch page\n");
+		return PTR_ERR(obj);
+	}
+
+	vma = i915_vma_create(obj, &engine->i915->ggtt.base, NULL);
+	if (IS_ERR(vma)) {
+		ret = PTR_ERR(vma);
+		goto err_unref;
+	}
+
+	ret = i915_vma_pin(vma, 0, 4096, PIN_GLOBAL | PIN_HIGH);
+	if (ret)
+		goto err_unref;
+
+	engine->scratch = vma;
+	DRM_DEBUG_DRIVER("%s pipe control offset: 0x%08llx\n",
+			 engine->name, vma->node.start);
+	return 0;
+
+err_unref:
+	i915_gem_object_put(obj);
+	return ret;
+}
+
+static void intel_engine_cleanup_scratch(struct intel_engine_cs *engine)
+{
+	struct i915_vma *vma;
+
+	vma = fetch_and_zero(&engine->scratch);
+	if (!vma)
+		return;
+
+	i915_vma_unpin(vma);
+	i915_vma_put(vma);
+}
+
 /**
  * intel_engines_init_common - initialize cengine state which might require hw access
  * @engine: Engine to initialize.
@@ -226,6 +274,8 @@ int intel_engine_init_common(struct intel_engine_cs *engine)
  */
 void intel_engine_cleanup_common(struct intel_engine_cs *engine)
 {
+	intel_engine_cleanup_scratch(engine);
+
 	intel_engine_cleanup_cmd_parser(engine);
 	intel_engine_fini_breadcrumbs(engine);
 	i915_gem_batch_pool_fini(&engine->batch_pool);

drivers/gpu/drm/i915/intel_lrc.c

@@ -1844,7 +1844,6 @@ int logical_render_ring_init(struct intel_engine_cs *engine)
 	else
 		engine->init_hw = gen8_init_render_ring;
 	engine->init_context = gen8_init_rcs_context;
-	engine->cleanup = intel_engine_cleanup_scratch;
 	engine->emit_flush = gen8_emit_flush_render;
 	engine->emit_request = gen8_emit_request_render;
 

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -613,54 +613,6 @@ out:
 	return ret;
 }
 
-void intel_engine_cleanup_scratch(struct intel_engine_cs *engine)
-{
-	struct i915_vma *vma;
-
-	vma = fetch_and_zero(&engine->scratch);
-	if (!vma)
-		return;
-
-	i915_vma_unpin(vma);
-	i915_vma_put(vma);
-}
-
-int intel_engine_create_scratch(struct intel_engine_cs *engine, int size)
-{
-	struct drm_i915_gem_object *obj;
-	struct i915_vma *vma;
-	int ret;
-
-	WARN_ON(engine->scratch);
-
-	obj = i915_gem_object_create_stolen(&engine->i915->drm, size);
-	if (!obj)
-		obj = i915_gem_object_create(&engine->i915->drm, size);
-	if (IS_ERR(obj)) {
-		DRM_ERROR("Failed to allocate scratch page\n");
-		return PTR_ERR(obj);
-	}
-
-	vma = i915_vma_create(obj, &engine->i915->ggtt.base, NULL);
-	if (IS_ERR(vma)) {
-		ret = PTR_ERR(vma);
-		goto err_unref;
-	}
-
-	ret = i915_vma_pin(vma, 0, 4096, PIN_GLOBAL | PIN_HIGH);
-	if (ret)
-		goto err_unref;
-
-	engine->scratch = vma;
-	DRM_DEBUG_DRIVER("%s pipe control offset: 0x%08llx\n",
-			 engine->name, vma->node.start);
-	return 0;
-
-err_unref:
-	i915_gem_object_put(obj);
-	return ret;
-}
-
 static int intel_ring_workarounds_emit(struct drm_i915_gem_request *req)
 {
 	struct intel_ring *ring = req->ring;
@@ -1311,8 +1263,6 @@ static void render_ring_cleanup(struct intel_engine_cs *engine)
 		i915_gem_object_put(dev_priv->semaphore_obj);
 		dev_priv->semaphore_obj = NULL;
 	}
-
-	intel_engine_cleanup_scratch(engine);
 }
 
 static int gen8_rcs_signal(struct drm_i915_gem_request *req)

drivers/gpu/drm/i915/intel_ringbuffer.h

@@ -472,11 +472,9 @@ void intel_ring_update_space(struct intel_ring *ring);
 
 void intel_engine_init_seqno(struct intel_engine_cs *engine, u32 seqno);
 
-int intel_engine_create_scratch(struct intel_engine_cs *engine, int size);
-void intel_engine_cleanup_scratch(struct intel_engine_cs *engine);
-
 void intel_engine_setup_common(struct intel_engine_cs *engine);
 int intel_engine_init_common(struct intel_engine_cs *engine);
+int intel_engine_create_scratch(struct intel_engine_cs *engine, int size);
 void intel_engine_cleanup_common(struct intel_engine_cs *engine);
 
 static inline int intel_engine_idle(struct intel_engine_cs *engine,