drm/i915/gvt: Introduce intel_vgpu_reset_submission

Introduce an generic API to reset vGPU virtual submission interface.
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>

drivers/gpu/drm/i915/gvt/execlist.c

@@ -564,18 +564,7 @@ void clean_execlist(struct intel_vgpu *vgpu)
 	}
 }
 
-int init_execlist(struct intel_vgpu *vgpu)
-{
-	enum intel_engine_id i;
-	struct intel_engine_cs *engine;
-
-	for_each_engine(engine, vgpu->gvt->dev_priv, i)
-		init_vgpu_execlist(vgpu, i);
-
-	return 0;
-}
-
-void intel_vgpu_reset_execlist(struct intel_vgpu *vgpu,
+void reset_execlist(struct intel_vgpu *vgpu,
 		unsigned long engine_mask)
 {
 	struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
@@ -587,8 +576,15 @@ void intel_vgpu_reset_execlist(struct intel_vgpu *vgpu,
 		init_vgpu_execlist(vgpu, engine->id);
 }
 
+int init_execlist(struct intel_vgpu *vgpu)
+{
+	reset_execlist(vgpu, ALL_ENGINES);
+	return 0;
+}
+
 const struct intel_vgpu_submission_ops intel_vgpu_execlist_submission_ops = {
 	.name = "execlist",
 	.init = init_execlist,
+	.reset = reset_execlist,
 	.clean = clean_execlist,
 };

drivers/gpu/drm/i915/gvt/gvt.h

@@ -151,6 +151,7 @@ struct intel_vgpu_submission_ops {
 	const char *name;
 	int (*init)(struct intel_vgpu *vgpu);
 	void (*clean)(struct intel_vgpu *vgpu);
+	void (*reset)(struct intel_vgpu *vgpu, unsigned long engine_mask);
 };
 
 struct intel_vgpu_submission {

drivers/gpu/drm/i915/gvt/scheduler.c

@@ -889,6 +889,26 @@ void intel_vgpu_clean_submission(struct intel_vgpu *vgpu)
 	kmem_cache_destroy(s->workloads);
 }
 
+
+/**
+ * intel_vgpu_reset_submission - reset submission-related resource for vGPU
+ * @vgpu: a vGPU
+ * @engine_mask: engines expected to be reset
+ *
+ * This function is called when a vGPU is being destroyed.
+ *
+ */
+void intel_vgpu_reset_submission(struct intel_vgpu *vgpu,
+		unsigned long engine_mask)
+{
+	struct intel_vgpu_submission *s = &vgpu->submission;
+
+	if (!s->active)
+		return;
+
+	s->ops->reset(vgpu, engine_mask);
+}
+
 /**
  * intel_vgpu_setup_submission - setup submission-related resource for vGPU
  * @vgpu: a vGPU

drivers/gpu/drm/i915/gvt/scheduler.h

@@ -139,6 +139,9 @@ void intel_gvt_wait_vgpu_idle(struct intel_vgpu *vgpu);
 
 int intel_vgpu_setup_submission(struct intel_vgpu *vgpu);
 
+void intel_vgpu_reset_submission(struct intel_vgpu *vgpu,
+				 unsigned long engine_mask);
+
 void intel_vgpu_clean_submission(struct intel_vgpu *vgpu);
 
 int intel_vgpu_select_submission_ops(struct intel_vgpu *vgpu,

drivers/gpu/drm/i915/gvt/vgpu.c

@@ -492,10 +492,10 @@ void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr,
 		mutex_lock(&gvt->lock);
 	}
 
-	intel_vgpu_reset_execlist(vgpu, resetting_eng);
-
+	intel_vgpu_reset_submission(vgpu, resetting_eng);
 	/* full GPU reset or device model level reset */
 	if (engine_mask == ALL_ENGINES || dmlr) {
+		intel_vgpu_select_submission_ops(vgpu, 0);
 
 		/*fence will not be reset during virtual reset */
 		if (dmlr) {