text: /*
   * Copyright (C) 2015 Red Hat, Inc.
   * 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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.
   */
  
  #include <drm/drmP.h>
  #include "virtgpu_drv.h"
  
  void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj)
  {
  	struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(gem_obj);
  
  	if (obj)
  		virtio_gpu_object_unref(&obj);
  }
  
  struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
  						  size_t size, bool kernel,
  						  bool pinned)
  {
  	struct virtio_gpu_device *vgdev = dev->dev_private;
  	struct virtio_gpu_object *obj;
  	int ret;
  
  	ret = virtio_gpu_object_create(vgdev, size, kernel, pinned, &obj);
  	if (ret)
  		return ERR_PTR(ret);
  
  	return obj;
  }
  
  int virtio_gpu_gem_create(struct drm_file *file,
  			  struct drm_device *dev,
  			  uint64_t size,
  			  struct drm_gem_object **obj_p,
  			  uint32_t *handle_p)
  {
  	struct virtio_gpu_object *obj;
  	int ret;
  	u32 handle;
  
  	obj = virtio_gpu_alloc_object(dev, size, false, false);
  	if (IS_ERR(obj))
  		return PTR_ERR(obj);
  
  	ret = drm_gem_handle_create(file, &obj->gem_base, &handle);
  	if (ret) {
  		drm_gem_object_release(&obj->gem_base);
  		return ret;
  	}
  
  	*obj_p = &obj->gem_base;
  
  	/* drop reference from allocate - handle holds it now */
  	drm_gem_object_put_unlocked(&obj->gem_base);
  
  	*handle_p = handle;
  	return 0;
  }
  
  int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
  				struct drm_device *dev,
  				struct drm_mode_create_dumb *args)
  {
  	struct virtio_gpu_device *vgdev = dev->dev_private;
  	struct drm_gem_object *gobj;
  	struct virtio_gpu_object *obj;
  	int ret;
  	uint32_t pitch;
  	uint32_t resid;
  	uint32_t format;
  
  	pitch = args->width * ((args->bpp + 1) / 8);
  	args->size = pitch * args->height;
  	args->size = ALIGN(args->size, PAGE_SIZE);
  
  	ret = virtio_gpu_gem_create(file_priv, dev, args->size, &gobj,
  				    &args->handle);
  	if (ret)
  		goto fail;
  
  	format = virtio_gpu_translate_format(DRM_FORMAT_XRGB8888);
  	virtio_gpu_resource_id_get(vgdev, &resid);
  	virtio_gpu_cmd_create_resource(vgdev, resid, format,
  				       args->width, args->height);
  
  	/* attach the object to the resource */
  	obj = gem_to_virtio_gpu_obj(gobj);
  	ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
  	if (ret)
  		goto fail;
  
  	obj->dumb = true;
  	args->pitch = pitch;
  	return ret;
  
  fail:
  	return ret;
  }
  
  int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
  			      struct drm_device *dev,
  			      uint32_t handle, uint64_t *offset_p)
  {
  	struct drm_gem_object *gobj;
  	struct virtio_gpu_object *obj;
  
  	BUG_ON(!offset_p);
  	gobj = drm_gem_object_lookup(file_priv, handle);
  	if (gobj == NULL)
  		return -ENOENT;
  	obj = gem_to_virtio_gpu_obj(gobj);
  	*offset_p = virtio_gpu_object_mmap_offset(obj);
  	drm_gem_object_put_unlocked(gobj);
  	return 0;
  }
  
  int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
  			       struct drm_file *file)
  {
  	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
  	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
  	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
  	int r;
  
  	if (!vgdev->has_virgl_3d)
  		return 0;
  
  	r = virtio_gpu_object_reserve(qobj, false);
  	if (r)
  		return r;
  
  	virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
  					       qobj->hw_res_handle);
  	virtio_gpu_object_unreserve(qobj);
  	return 0;
  }
  
  void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
  				 struct drm_file *file)
  {
  	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
  	struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
  	struct virtio_gpu_object *qobj = gem_to_virtio_gpu_obj(obj);
  	int r;
  
  	if (!vgdev->has_virgl_3d)
  		return;
  
  	r = virtio_gpu_object_reserve(qobj, false);
  	if (r)
  		return;
  
  	virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
  						qobj->hw_res_handle);
  	virtio_gpu_object_unreserve(qobj);
  }
  