1. 根目录:
2. drivers
3. gpu
4. drm
5. vmwgfx
6. vmwgfx_resource_priv.h

/**************************************************************************
 *
 * Copyright © 2012 VMware, Inc., Palo Alto, CA., USA
 * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS 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.
 *
 **************************************************************************/

#ifndef _VMWGFX_RESOURCE_PRIV_H_
#define _VMWGFX_RESOURCE_PRIV_H_

#include "vmwgfx_drv.h"

/**
 * struct vmw_user_resource_conv - Identify a derived user-exported resource
 * type and provide a function to convert its ttm_base_object pointer to
 * a struct vmw_resource
 */
struct vmw_user_resource_conv {
	enum ttm_object_type object_type;
	struct vmw_resource *(*base_obj_to_res)(struct ttm_base_object *base);
	void (*res_free) (struct vmw_resource *res);
};

/**
 * struct vmw_res_func - members and functions common for a resource type
 *
 * @res_type:          Enum that identifies the lru list to use for eviction.
 * @needs_backup:      Whether the resource is guest-backed and needs
 *                     persistent buffer storage.
 * @type_name:         String that identifies the resource type.
 * @backup_placement:  TTM placement for backup buffers.
 * @may_evict          Whether the resource may be evicted.
 * @create:            Create a hardware resource.
 * @destroy:           Destroy a hardware resource.
 * @bind:              Bind a hardware resource to persistent buffer storage.
 * @unbind:            Unbind a hardware resource from persistent
 *                     buffer storage.
 */

struct vmw_res_func {
	enum vmw_res_type res_type;
	bool needs_backup;
	const char *type_name;
	struct ttm_placement *backup_placement;
	bool may_evict;

	int (*create) (struct vmw_resource *res);
	int (*destroy) (struct vmw_resource *res);
	int (*bind) (struct vmw_resource *res,
		     struct ttm_validate_buffer *val_buf);
	int (*unbind) (struct vmw_resource *res,
		       bool readback,
		       struct ttm_validate_buffer *val_buf);
};

int vmw_resource_alloc_id(struct vmw_resource *res);
void vmw_resource_release_id(struct vmw_resource *res);
int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res,
		      bool delay_id,
		      void (*res_free) (struct vmw_resource *res),
		      const struct vmw_res_func *func);
void vmw_resource_activate(struct vmw_resource *res,
			   void (*hw_destroy) (struct vmw_resource *));
#endif