drm/i915/gvt: Move ring scan buffers into intel_vgpu_submission

Move ring scan buffers into intel_vgpu_submission since they belongs to
a part of vGPU submission stuffs.
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>

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

@@ -2604,6 +2604,7 @@ static int scan_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx)
 static int shadow_workload_ring_buffer(struct intel_vgpu_workload *workload)
 {
 	struct intel_vgpu *vgpu = workload->vgpu;
+	struct intel_vgpu_submission *s = &vgpu->submission;
 	unsigned long gma_head, gma_tail, gma_top, guest_rb_size;
 	void *shadow_ring_buffer_va;
 	int ring_id = workload->ring_id;
@@ -2619,21 +2620,21 @@ static int shadow_workload_ring_buffer(struct intel_vgpu_workload *workload)
 	gma_tail = workload->rb_start + workload->rb_tail;
 	gma_top = workload->rb_start + guest_rb_size;
 
-	if (workload->rb_len > vgpu->ring_scan_buffer_size[ring_id]) {
+	if (workload->rb_len > s->ring_scan_buffer_size[ring_id]) {
 		void *p;
 
 		/* realloc the new ring buffer if needed */
-		p = krealloc(vgpu->ring_scan_buffer[ring_id], workload->rb_len,
+		p = krealloc(s->ring_scan_buffer[ring_id], workload->rb_len,
 				GFP_KERNEL);
 		if (!p) {
 			gvt_vgpu_err("fail to re-alloc ring scan buffer\n");
 			return -ENOMEM;
 		}
-		vgpu->ring_scan_buffer[ring_id] = p;
-		vgpu->ring_scan_buffer_size[ring_id] = workload->rb_len;
+		s->ring_scan_buffer[ring_id] = p;
+		s->ring_scan_buffer_size[ring_id] = workload->rb_len;
 	}
 
-	shadow_ring_buffer_va = vgpu->ring_scan_buffer[ring_id];
+	shadow_ring_buffer_va = s->ring_scan_buffer[ring_id];
 
 	/* get shadow ring buffer va */
 	workload->shadow_ring_buffer_va = shadow_ring_buffer_va;

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

@@ -864,15 +864,18 @@ void intel_vgpu_clean_execlist(struct intel_vgpu *vgpu)
 	clean_workloads(vgpu, ALL_ENGINES);
 
 	for_each_engine(engine, vgpu->gvt->dev_priv, i) {
-		kfree(vgpu->ring_scan_buffer[i]);
-		vgpu->ring_scan_buffer[i] = NULL;
-		vgpu->ring_scan_buffer_size[i] = 0;
+		struct intel_vgpu_submission *s = &vgpu->submission;
+
+		kfree(s->ring_scan_buffer[i]);
+		s->ring_scan_buffer[i] = NULL;
+		s->ring_scan_buffer_size[i] = 0;
 	}
 }
 
 #define RESERVE_RING_BUFFER_SIZE		((1 * PAGE_SIZE)/8)
 int intel_vgpu_init_execlist(struct intel_vgpu *vgpu)
 {
+	struct intel_vgpu_submission *s = &vgpu->submission;
 	enum intel_engine_id i;
 	struct intel_engine_cs *engine;
 
@@ -881,21 +884,21 @@ int intel_vgpu_init_execlist(struct intel_vgpu *vgpu)
 
 	/* each ring has a shadow ring buffer until vgpu destroyed */
 	for_each_engine(engine, vgpu->gvt->dev_priv, i) {
-		vgpu->ring_scan_buffer[i] =
+		s->ring_scan_buffer[i] =
 			kmalloc(RESERVE_RING_BUFFER_SIZE, GFP_KERNEL);
-		if (!vgpu->ring_scan_buffer[i]) {
+		if (!s->ring_scan_buffer[i]) {
 			gvt_vgpu_err("fail to alloc ring scan buffer\n");
 			goto out;
 		}
-		vgpu->ring_scan_buffer_size[i] = RESERVE_RING_BUFFER_SIZE;
+		s->ring_scan_buffer_size[i] = RESERVE_RING_BUFFER_SIZE;
 	}
 	return 0;
 out:
 	for_each_engine(engine, vgpu->gvt->dev_priv, i) {
-		if (vgpu->ring_scan_buffer_size[i]) {
-			kfree(vgpu->ring_scan_buffer[i]);
-			vgpu->ring_scan_buffer[i] = NULL;
-			vgpu->ring_scan_buffer_size[i] = 0;
+		if (s->ring_scan_buffer_size[i]) {
+			kfree(s->ring_scan_buffer[i]);
+			s->ring_scan_buffer[i] = NULL;
+			s->ring_scan_buffer_size[i] = 0;
 		}
 	}
 	return -ENOMEM;

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

@@ -150,6 +150,9 @@ struct intel_vgpu_submission {
 	struct i915_gem_context *shadow_ctx;
 	DECLARE_BITMAP(shadow_ctx_desc_updated, I915_NUM_ENGINES);
 	DECLARE_BITMAP(tlb_handle_pending, I915_NUM_ENGINES);
+	/* 1/2K for each engine */
+	void *ring_scan_buffer[I915_NUM_ENGINES];
+	int ring_scan_buffer_size[I915_NUM_ENGINES];
 };
 
 struct intel_vgpu {
@@ -172,10 +175,6 @@ struct intel_vgpu {
 	struct intel_vgpu_opregion opregion;
 	struct intel_vgpu_display display;
 	struct intel_vgpu_submission submission;
-	/* 1/2K for each engine */
-	void *ring_scan_buffer[I915_NUM_ENGINES];
-	int ring_scan_buffer_size[I915_NUM_ENGINES];
-
 
 #if IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT)
 	struct {