text: /*
   * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   *
   * Authors:
   *    Eddie Dong <eddie.dong@intel.com>
   *    Kevin Tian <kevin.tian@intel.com>
   *
   * Contributors:
   *    Ping Gao <ping.a.gao@intel.com>
   *    Zhi Wang <zhi.a.wang@intel.com>
   *    Bing Niu <bing.niu@intel.com>
   *
   */
  
  #include "i915_drv.h"
  #include "gvt.h"
  #include "i915_pvinfo.h"
  
  void populate_pvinfo_page(struct intel_vgpu *vgpu)
  {
  	/* setup the ballooning information */
  	vgpu_vreg64_t(vgpu, vgtif_reg(magic)) = VGT_MAGIC;
  	vgpu_vreg_t(vgpu, vgtif_reg(version_major)) = 1;
  	vgpu_vreg_t(vgpu, vgtif_reg(version_minor)) = 0;
  	vgpu_vreg_t(vgpu, vgtif_reg(display_ready)) = 0;
  	vgpu_vreg_t(vgpu, vgtif_reg(vgt_id)) = vgpu->id;
  
  	vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) = VGT_CAPS_FULL_PPGTT;
  	vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) |= VGT_CAPS_HWSP_EMULATION;
  	vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) |= VGT_CAPS_HUGE_GTT;
  
  	vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.mappable_gmadr.base)) =
  		vgpu_aperture_gmadr_base(vgpu);
  	vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.mappable_gmadr.size)) =
  		vgpu_aperture_sz(vgpu);
  	vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.base)) =
  		vgpu_hidden_gmadr_base(vgpu);
  	vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.size)) =
  		vgpu_hidden_sz(vgpu);
  
  	vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.fence_num)) = vgpu_fence_sz(vgpu);
  
  	vgpu_vreg_t(vgpu, vgtif_reg(cursor_x_hot)) = UINT_MAX;
  	vgpu_vreg_t(vgpu, vgtif_reg(cursor_y_hot)) = UINT_MAX;
  
  	gvt_dbg_core("Populate PVINFO PAGE for vGPU %d\n", vgpu->id);
  	gvt_dbg_core("aperture base [GMADR] 0x%llx size 0x%llx\n",
  		vgpu_aperture_gmadr_base(vgpu), vgpu_aperture_sz(vgpu));
  	gvt_dbg_core("hidden base [GMADR] 0x%llx size=0x%llx\n",
  		vgpu_hidden_gmadr_base(vgpu), vgpu_hidden_sz(vgpu));
  	gvt_dbg_core("fence size %d\n", vgpu_fence_sz(vgpu));
  
  	WARN_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
  }
  
  #define VGPU_MAX_WEIGHT 16
  #define VGPU_WEIGHT(vgpu_num)	\
  	(VGPU_MAX_WEIGHT / (vgpu_num))
  
  static struct {
  	unsigned int low_mm;
  	unsigned int high_mm;
  	unsigned int fence;
  
  	/* A vGPU with a weight of 8 will get twice as much GPU as a vGPU
  	 * with a weight of 4 on a contended host, different vGPU type has
  	 * different weight set. Legal weights range from 1 to 16.
  	 */
  	unsigned int weight;
  	enum intel_vgpu_edid edid;
  	char *name;
  } vgpu_types[] = {
  /* Fixed vGPU type table */
  	{ MB_TO_BYTES(64), MB_TO_BYTES(384), 4, VGPU_WEIGHT(8), GVT_EDID_1024_768, "8" },
  	{ MB_TO_BYTES(128), MB_TO_BYTES(512), 4, VGPU_WEIGHT(4), GVT_EDID_1920_1200, "4" },
  	{ MB_TO_BYTES(256), MB_TO_BYTES(1024), 4, VGPU_WEIGHT(2), GVT_EDID_1920_1200, "2" },
  	{ MB_TO_BYTES(512), MB_TO_BYTES(2048), 4, VGPU_WEIGHT(1), GVT_EDID_1920_1200, "1" },
  };
  
  /**
   * intel_gvt_init_vgpu_types - initialize vGPU type list
   * @gvt : GVT device
   *
   * Initialize vGPU type list based on available resource.
   *
   */
  int intel_gvt_init_vgpu_types(struct intel_gvt *gvt)
  {
  	unsigned int num_types;
  	unsigned int i, low_avail, high_avail;
  	unsigned int min_low;
  
  	/* vGPU type name is defined as GVTg_Vx_y which contains
  	 * physical GPU generation type (e.g V4 as BDW server, V5 as
  	 * SKL server).
  	 *
  	 * Depend on physical SKU resource, might see vGPU types like
  	 * GVTg_V4_8, GVTg_V4_4, GVTg_V4_2, etc. We can create
  	 * different types of vGPU on same physical GPU depending on
  	 * available resource. Each vGPU type will have "avail_instance"
  	 * to indicate how many vGPU instance can be created for this
  	 * type.
  	 *
  	 */
  	low_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE;
  	high_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE;
  	num_types = sizeof(vgpu_types) / sizeof(vgpu_types[0]);
  
  	gvt->types = kcalloc(num_types, sizeof(struct intel_vgpu_type),
  			     GFP_KERNEL);
  	if (!gvt->types)
  		return -ENOMEM;
  
  	min_low = MB_TO_BYTES(32);
  	for (i = 0; i < num_types; ++i) {
  		if (low_avail / vgpu_types[i].low_mm == 0)
  			break;
  
  		gvt->types[i].low_gm_size = vgpu_types[i].low_mm;
  		gvt->types[i].high_gm_size = vgpu_types[i].high_mm;
  		gvt->types[i].fence = vgpu_types[i].fence;
  
  		if (vgpu_types[i].weight < 1 ||
  					vgpu_types[i].weight > VGPU_MAX_WEIGHT)
  			return -EINVAL;
  
  		gvt->types[i].weight = vgpu_types[i].weight;
  		gvt->types[i].resolution = vgpu_types[i].edid;
  		gvt->types[i].avail_instance = min(low_avail / vgpu_types[i].low_mm,
  						   high_avail / vgpu_types[i].high_mm);
  
  		if (IS_GEN(gvt->dev_priv, 8))
  			sprintf(gvt->types[i].name, "GVTg_V4_%s",
  						vgpu_types[i].name);
  		else if (IS_GEN(gvt->dev_priv, 9))
  			sprintf(gvt->types[i].name, "GVTg_V5_%s",
  						vgpu_types[i].name);
  
  		gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u weight %u res %s\n",
  			     i, gvt->types[i].name,
  			     gvt->types[i].avail_instance,
  			     gvt->types[i].low_gm_size,
  			     gvt->types[i].high_gm_size, gvt->types[i].fence,
  			     gvt->types[i].weight,
  			     vgpu_edid_str(gvt->types[i].resolution));
  	}
  
  	gvt->num_types = i;
  	return 0;
  }
  
  void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt)
  {
  	kfree(gvt->types);
  }
  
  static void intel_gvt_update_vgpu_types(struct intel_gvt *gvt)
  {
  	int i;
  	unsigned int low_gm_avail, high_gm_avail, fence_avail;
  	unsigned int low_gm_min, high_gm_min, fence_min;
  
  	/* Need to depend on maxium hw resource size but keep on
  	 * static config for now.
  	 */
  	low_gm_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE -
  		gvt->gm.vgpu_allocated_low_gm_size;
  	high_gm_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE -
  		gvt->gm.vgpu_allocated_high_gm_size;
  	fence_avail = gvt_fence_sz(gvt) - HOST_FENCE -
  		gvt->fence.vgpu_allocated_fence_num;
  
  	for (i = 0; i < gvt->num_types; i++) {
  		low_gm_min = low_gm_avail / gvt->types[i].low_gm_size;
  		high_gm_min = high_gm_avail / gvt->types[i].high_gm_size;
  		fence_min = fence_avail / gvt->types[i].fence;
  		gvt->types[i].avail_instance = min(min(low_gm_min, high_gm_min),
  						   fence_min);
  
  		gvt_dbg_core("update type[%d]: %s avail %u low %u high %u fence %u\n",
  		       i, gvt->types[i].name,
  		       gvt->types[i].avail_instance, gvt->types[i].low_gm_size,
  		       gvt->types[i].high_gm_size, gvt->types[i].fence);
  	}
  }
  
  /**
   * intel_gvt_active_vgpu - activate a virtual GPU
   * @vgpu: virtual GPU
   *
   * This function is called when user wants to activate a virtual GPU.
   *
   */
  void intel_gvt_activate_vgpu(struct intel_vgpu *vgpu)
  {
  	mutex_lock(&vgpu->gvt->lock);
  	vgpu->active = true;
  	mutex_unlock(&vgpu->gvt->lock);
  }
  
  /**
   * intel_gvt_deactive_vgpu - deactivate a virtual GPU
   * @vgpu: virtual GPU
   *
   * This function is called when user wants to deactivate a virtual GPU.
   * The virtual GPU will be stopped.
   *
   */
  void intel_gvt_deactivate_vgpu(struct intel_vgpu *vgpu)
  {
  	mutex_lock(&vgpu->vgpu_lock);
  
  	vgpu->active = false;
  
  	if (atomic_read(&vgpu->submission.running_workload_num)) {
  		mutex_unlock(&vgpu->vgpu_lock);
  		intel_gvt_wait_vgpu_idle(vgpu);
  		mutex_lock(&vgpu->vgpu_lock);
  	}
  
  	intel_vgpu_stop_schedule(vgpu);
  
  	mutex_unlock(&vgpu->vgpu_lock);
  }
  
  /**
   * intel_gvt_release_vgpu - release a virtual GPU
   * @vgpu: virtual GPU
   *
   * This function is called when user wants to release a virtual GPU.
   * The virtual GPU will be stopped and all runtime information will be
   * destroyed.
   *
   */
  void intel_gvt_release_vgpu(struct intel_vgpu *vgpu)
  {
  	intel_gvt_deactivate_vgpu(vgpu);
  
  	mutex_lock(&vgpu->vgpu_lock);
  	intel_vgpu_clean_workloads(vgpu, ALL_ENGINES);
  	intel_vgpu_dmabuf_cleanup(vgpu);
  	mutex_unlock(&vgpu->vgpu_lock);
  }
  
  /**
   * intel_gvt_destroy_vgpu - destroy a virtual GPU
   * @vgpu: virtual GPU
   *
   * This function is called when user wants to destroy a virtual GPU.
   *
   */
  void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu)
  {
  	struct intel_gvt *gvt = vgpu->gvt;
  
  	mutex_lock(&vgpu->vgpu_lock);
  
  	WARN(vgpu->active, "vGPU is still active!\n");
  
  	intel_gvt_debugfs_remove_vgpu(vgpu);
  	intel_vgpu_clean_sched_policy(vgpu);
  	intel_vgpu_clean_submission(vgpu);
  	intel_vgpu_clean_display(vgpu);
  	intel_vgpu_clean_opregion(vgpu);
  	intel_vgpu_reset_ggtt(vgpu, true);
  	intel_vgpu_clean_gtt(vgpu);
  	intel_gvt_hypervisor_detach_vgpu(vgpu);
  	intel_vgpu_free_resource(vgpu);
  	intel_vgpu_clean_mmio(vgpu);
  	intel_vgpu_dmabuf_cleanup(vgpu);
  	mutex_unlock(&vgpu->vgpu_lock);
  
  	mutex_lock(&gvt->lock);
  	idr_remove(&gvt->vgpu_idr, vgpu->id);
  	if (idr_is_empty(&gvt->vgpu_idr))
  		intel_gvt_clean_irq(gvt);
  	intel_gvt_update_vgpu_types(gvt);
  	mutex_unlock(&gvt->lock);
  
  	vfree(vgpu);
  }
  
  #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;
  	mutex_init(&vgpu->vgpu_lock);
  
  	for (i = 0; i < I915_NUM_ENGINES; i++)
  		INIT_LIST_HEAD(&vgpu->submission.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)
  {
  	mutex_lock(&vgpu->vgpu_lock);
  	intel_vgpu_clean_sched_policy(vgpu);
  	mutex_unlock(&vgpu->vgpu_lock);
  
  	vfree(vgpu);
  }
  
  static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
  		struct intel_vgpu_creation_params *param)
  {
  	struct intel_vgpu *vgpu;
  	int ret;
  
  	gvt_dbg_core("handle %llu low %llu MB high %llu MB fence %llu\n",
  			param->handle, param->low_gm_sz, param->high_gm_sz,
  			param->fence_sz);
  
  	vgpu = vzalloc(sizeof(*vgpu));
  	if (!vgpu)
  		return ERR_PTR(-ENOMEM);
  
  	ret = idr_alloc(&gvt->vgpu_idr, vgpu, IDLE_VGPU_IDR + 1, GVT_MAX_VGPU,
  		GFP_KERNEL);
  	if (ret < 0)
  		goto out_free_vgpu;
  
  	vgpu->id = ret;
  	vgpu->handle = param->handle;
  	vgpu->gvt = gvt;
  	vgpu->sched_ctl.weight = param->weight;
  	mutex_init(&vgpu->vgpu_lock);
  	mutex_init(&vgpu->dmabuf_lock);
  	INIT_LIST_HEAD(&vgpu->dmabuf_obj_list_head);
  	INIT_RADIX_TREE(&vgpu->page_track_tree, GFP_KERNEL);
  	idr_init(&vgpu->object_idr);
  	intel_vgpu_init_cfg_space(vgpu, param->primary);
  
  	ret = intel_vgpu_init_mmio(vgpu);
  	if (ret)
  		goto out_clean_idr;
  
  	ret = intel_vgpu_alloc_resource(vgpu, param);
  	if (ret)
  		goto out_clean_vgpu_mmio;
  
  	populate_pvinfo_page(vgpu);
  
  	ret = intel_gvt_hypervisor_attach_vgpu(vgpu);
  	if (ret)
  		goto out_clean_vgpu_resource;
  
  	ret = intel_vgpu_init_gtt(vgpu);
  	if (ret)
  		goto out_detach_hypervisor_vgpu;
  
  	ret = intel_vgpu_init_opregion(vgpu);
  	if (ret)
  		goto out_clean_gtt;
  
  	ret = intel_vgpu_init_display(vgpu, param->resolution);
  	if (ret)
  		goto out_clean_opregion;
  
  	ret = intel_vgpu_setup_submission(vgpu);
  	if (ret)
  		goto out_clean_display;
  
  	ret = intel_vgpu_init_sched_policy(vgpu);
  	if (ret)
  		goto out_clean_submission;
  
  	ret = intel_gvt_debugfs_add_vgpu(vgpu);
  	if (ret)
  		goto out_clean_sched_policy;
  
  	ret = intel_gvt_hypervisor_set_opregion(vgpu);
  	if (ret)
  		goto out_clean_sched_policy;
  
  	/*TODO: add more platforms support */
  	if (IS_SKYLAKE(gvt->dev_priv) || IS_KABYLAKE(gvt->dev_priv))
  		ret = intel_gvt_hypervisor_set_edid(vgpu, PORT_D);
  	if (ret)
  		goto out_clean_sched_policy;
  
  	return vgpu;
  
  out_clean_sched_policy:
  	intel_vgpu_clean_sched_policy(vgpu);
  out_clean_submission:
  	intel_vgpu_clean_submission(vgpu);
  out_clean_display:
  	intel_vgpu_clean_display(vgpu);
  out_clean_opregion:
  	intel_vgpu_clean_opregion(vgpu);
  out_clean_gtt:
  	intel_vgpu_clean_gtt(vgpu);
  out_detach_hypervisor_vgpu:
  	intel_gvt_hypervisor_detach_vgpu(vgpu);
  out_clean_vgpu_resource:
  	intel_vgpu_free_resource(vgpu);
  out_clean_vgpu_mmio:
  	intel_vgpu_clean_mmio(vgpu);
  out_clean_idr:
  	idr_remove(&gvt->vgpu_idr, vgpu->id);
  out_free_vgpu:
  	vfree(vgpu);
  	return ERR_PTR(ret);
  }
  
  /**
   * intel_gvt_create_vgpu - create a virtual GPU
   * @gvt: GVT device
   * @type: type of the vGPU to create
   *
   * This function is called when user wants to create a virtual GPU.
   *
   * Returns:
   * pointer to intel_vgpu, error pointer if failed.
   */
  struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
  				struct intel_vgpu_type *type)
  {
  	struct intel_vgpu_creation_params param;
  	struct intel_vgpu *vgpu;
  
  	param.handle = 0;
  	param.primary = 1;
  	param.low_gm_sz = type->low_gm_size;
  	param.high_gm_sz = type->high_gm_size;
  	param.fence_sz = type->fence;
  	param.weight = type->weight;
  	param.resolution = type->resolution;
  
  	/* XXX current param based on MB */
  	param.low_gm_sz = BYTES_TO_MB(param.low_gm_sz);
  	param.high_gm_sz = BYTES_TO_MB(param.high_gm_sz);
  
  	mutex_lock(&gvt->lock);
  	vgpu = __intel_gvt_create_vgpu(gvt, &param);
  	if (!IS_ERR(vgpu))
  		/* calculate left instance change for types */
  		intel_gvt_update_vgpu_types(gvt);
  	mutex_unlock(&gvt->lock);
  
  	return vgpu;
  }
  
  /**
   * intel_gvt_reset_vgpu_locked - reset a virtual GPU by DMLR or GT reset
   * @vgpu: virtual GPU
   * @dmlr: vGPU Device Model Level Reset or GT Reset
   * @engine_mask: engines to reset for GT reset
   *
   * This function is called when user wants to reset a virtual GPU through
   * device model reset or GT reset. The caller should hold the vgpu lock.
   *
   * vGPU Device Model Level Reset (DMLR) simulates the PCI level reset to reset
   * the whole vGPU to default state as when it is created. This vGPU function
   * is required both for functionary and security concerns.The ultimate goal
   * of vGPU FLR is that reuse a vGPU instance by virtual machines. When we
   * assign a vGPU to a virtual machine we must isse such reset first.
   *
   * Full GT Reset and Per-Engine GT Reset are soft reset flow for GPU engines
   * (Render, Blitter, Video, Video Enhancement). It is defined by GPU Spec.
   * Unlike the FLR, GT reset only reset particular resource of a vGPU per
   * the reset request. Guest driver can issue a GT reset by programming the
   * virtual GDRST register to reset specific virtual GPU engine or all
   * engines.
   *
   * The parameter dev_level is to identify if we will do DMLR or GT reset.
   * The parameter engine_mask is to specific the engines that need to be
   * resetted. If value ALL_ENGINES is given for engine_mask, it means
   * the caller requests a full GT reset that we will reset all virtual
   * GPU engines. For FLR, engine_mask is ignored.
   */
  void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr,
  				 intel_engine_mask_t engine_mask)
  {
  	struct intel_gvt *gvt = vgpu->gvt;
  	struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;
  	intel_engine_mask_t resetting_eng = dmlr ? ALL_ENGINES : engine_mask;
  
  	gvt_dbg_core("------------------------------------------\n");
  	gvt_dbg_core("resseting vgpu%d, dmlr %d, engine_mask %08x\n",
  		     vgpu->id, dmlr, engine_mask);
  
  	vgpu->resetting_eng = resetting_eng;
  
  	intel_vgpu_stop_schedule(vgpu);
  	/*
  	 * The current_vgpu will set to NULL after stopping the
  	 * scheduler when the reset is triggered by current vgpu.
  	 */
  	if (scheduler->current_vgpu == NULL) {
  		mutex_unlock(&vgpu->vgpu_lock);
  		intel_gvt_wait_vgpu_idle(vgpu);
  		mutex_lock(&vgpu->vgpu_lock);
  	}
  
  	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, ALL_ENGINES, 0);
  		intel_vgpu_invalidate_ppgtt(vgpu);
  		/*fence will not be reset during virtual reset */
  		if (dmlr) {
  			intel_vgpu_reset_gtt(vgpu);
  			intel_vgpu_reset_resource(vgpu);
  		}
  
  		intel_vgpu_reset_mmio(vgpu, dmlr);
  		populate_pvinfo_page(vgpu);
  		intel_vgpu_reset_display(vgpu);
  
  		if (dmlr) {
  			intel_vgpu_reset_cfg_space(vgpu);
  			/* only reset the failsafe mode when dmlr reset */
  			vgpu->failsafe = false;
  			vgpu->pv_notified = false;
  		}
  	}
  
  	vgpu->resetting_eng = 0;
  	gvt_dbg_core("reset vgpu%d done\n", vgpu->id);
  	gvt_dbg_core("------------------------------------------\n");
  }
  
  /**
   * intel_gvt_reset_vgpu - reset a virtual GPU (Function Level)
   * @vgpu: virtual GPU
   *
   * This function is called when user wants to reset a virtual GPU.
   *
   */
  void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu)
  {
  	mutex_lock(&vgpu->vgpu_lock);
  	intel_gvt_reset_vgpu_locked(vgpu, true, 0);
  	mutex_unlock(&vgpu->vgpu_lock);
  }
  