+struct i915_sched_engine *
+i915_sched_engine_create(unsigned int subclass);
+
+void i915_sched_engine_free(struct kref *kref);
+
+static inline struct i915_sched_engine *
+i915_sched_engine_get(struct i915_sched_engine *sched_engine)
+{
+ kref_get(&sched_engine->ref);
+ return sched_engine;
+}
+
+static inline void
+i915_sched_engine_put(struct i915_sched_engine *sched_engine)
+{
+ kref_put(&sched_engine->ref, i915_sched_engine_free);
+}
+
+static inline bool
+i915_sched_engine_is_empty(struct i915_sched_engine *sched_engine)
+{
+ return RB_EMPTY_ROOT(&sched_engine->queue.rb_root);
+}
+
+static inline void
+i915_sched_engine_reset_on_empty(struct i915_sched_engine *sched_engine)
+{
+ if (i915_sched_engine_is_empty(sched_engine))
+ sched_engine->no_priolist = false;
+}
+