3 files changed, 69 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/gvt/gvt.c b/drivers/gpu/drm/i915/gvt/gvt.c
index 894735c77f63..0f3a98865a58 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.c
+++ b/drivers/gpu/drm/i915/gvt/gvt.c
@@ -202,6 +202,8 @@ void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
 
         idr_destroy(&gvt->vgpu_idr);
 
+        intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
+
         kfree(dev_priv->gvt);
         dev_priv->gvt = NULL;
 }
@@ -220,6 +222,7 @@ void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
 int intel_gvt_init_device(struct drm_i915_private *dev_priv)
 {
         struct intel_gvt *gvt;
+        struct intel_vgpu *vgpu;
         int ret;
 
         /*
@@ -292,6 +295,14 @@ int intel_gvt_init_device(struct drm_i915_private *dev_priv)
                 goto out_clean_types;
         }
 
+        vgpu = intel_gvt_create_idle_vgpu(gvt);
+        if (IS_ERR(vgpu)) {
+                ret = PTR_ERR(vgpu);
+                gvt_err("failed to create idle vgpu\n");
+                goto out_clean_types;
+        }
+        gvt->idle_vgpu = vgpu;
+
         gvt_dbg_core("gvt device initialization is done\n");
         dev_priv->gvt = gvt;
         return 0;
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index 0631f64e06db..806da96b6a92 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -243,6 +243,7 @@ struct intel_gvt {
         DECLARE_HASHTABLE(cmd_table, GVT_CMD_HASH_BITS);
         struct intel_vgpu_type *types;
         unsigned int num_types;
+        struct intel_vgpu *idle_vgpu;
 
         struct task_struct *service_thread;
         wait_queue_head_t service_thread_wq;
@@ -386,6 +387,8 @@ static inline void intel_vgpu_write_pci_bar(struct intel_vgpu *vgpu,
 int intel_gvt_init_vgpu_types(struct intel_gvt *gvt);
 void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt);
 
+struct intel_vgpu *intel_gvt_create_idle_vgpu(struct intel_gvt *gvt);
+void intel_gvt_destroy_idle_vgpu(struct intel_vgpu *vgpu);
 struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
                                          struct intel_vgpu_type *type);
 void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu);
diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
index 36c107e2058a..6ba02525e905 100644
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -233,6 +233,59 @@ void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu)
         mutex_unlock(&gvt->lock);
 }
 
+#define IDLE_VGPU_IDR 0
+
+/**
+ * intel_gvt_create_idle_vgpu - create an idle virtual GPU
+ * @gvt: GVT device
+ *
+ * This function is called when user wants to create an idle virtual GPU.
+ *
+ * Returns:
+ * pointer to intel_vgpu, error pointer if failed.
+ */
+struct intel_vgpu *intel_gvt_create_idle_vgpu(struct intel_gvt *gvt)
+{
+        struct intel_vgpu *vgpu;
+        enum intel_engine_id i;
+        int ret;
+
+        vgpu = vzalloc(sizeof(*vgpu));
+        if (!vgpu)
+                return ERR_PTR(-ENOMEM);
+
+        vgpu->id = IDLE_VGPU_IDR;
+        vgpu->gvt = gvt;
+
+        for (i = 0; i < I915_NUM_ENGINES; i++)
+                INIT_LIST_HEAD(&vgpu->workload_q_head[i]);
+
+        ret = intel_vgpu_init_sched_policy(vgpu);
+        if (ret)
+                goto out_free_vgpu;
+
+        vgpu->active = false;
+
+        return vgpu;
+
+out_free_vgpu:
+        vfree(vgpu);
+        return ERR_PTR(ret);
+}
+
+/**
+ * intel_gvt_destroy_vgpu - destroy an idle virtual GPU
+ * @vgpu: virtual GPU
+ *
+ * This function is called when user wants to destroy an idle virtual GPU.
+ *
+ */
+void intel_gvt_destroy_idle_vgpu(struct intel_vgpu *vgpu)
+{
+        intel_vgpu_clean_sched_policy(vgpu);
+        vfree(vgpu);
+}
+
 static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
                 struct intel_vgpu_creation_params *param)
 {
@@ -249,7 +302,8 @@ static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
 
         mutex_lock(&gvt->lock);
 
-        ret = idr_alloc(&gvt->vgpu_idr, vgpu, 1, GVT_MAX_VGPU, GFP_KERNEL);
+        ret = idr_alloc(&gvt->vgpu_idr, vgpu, IDLE_VGPU_IDR + 1, GVT_MAX_VGPU,
+                GFP_KERNEL);
         if (ret < 0)
                 goto out_free_vgpu;