晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/include/drm/qxl_drm.h
/*
 * Copyright 2013 Red Hat
 * 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 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 QXL_DRM_H
#define QXL_DRM_H

#include "drm.h"

#if defined(__cplusplus)
extern "C" {
#endif

/* Please note that modifications to all structs defined here are
 * subject to backwards-compatibility constraints.
 *
 * Do not use pointers, use __u64 instead for 32 bit / 64 bit user/kernel
 * compatibility Keep fields aligned to their size
 */

#define QXL_GEM_DOMAIN_CPU 0
#define QXL_GEM_DOMAIN_VRAM 1
#define QXL_GEM_DOMAIN_SURFACE 2

#define DRM_QXL_ALLOC       0x00
#define DRM_QXL_MAP         0x01
#define DRM_QXL_EXECBUFFER  0x02
#define DRM_QXL_UPDATE_AREA 0x03
#define DRM_QXL_GETPARAM    0x04
#define DRM_QXL_CLIENTCAP   0x05

#define DRM_QXL_ALLOC_SURF  0x06

struct drm_qxl_alloc {
	__u32 size;
	__u32 handle; /* 0 is an invalid handle */
};

struct drm_qxl_map {
	__u64 offset; /* use for mmap system call */
	__u32 handle;
	__u32 pad;
};

/*
 * dest is the bo we are writing the relocation into
 * src is bo we are relocating.
 * *(dest_handle.base_addr + dest_offset) = physical_address(src_handle.addr +
 * src_offset)
 */
#define QXL_RELOC_TYPE_BO 1
#define QXL_RELOC_TYPE_SURF 2

struct drm_qxl_reloc {
	__u64 src_offset; /* offset into src_handle or src buffer */
	__u64 dst_offset; /* offset in dest handle */
	__u32 src_handle; /* dest handle to compute address from */
	__u32 dst_handle; /* 0 if to command buffer */
	__u32 reloc_type;
	__u32 pad;
};

struct drm_qxl_command {
	__u64		command; /* void* */
	__u64		relocs; /* struct drm_qxl_reloc* */
	__u32		type;
	__u32		command_size;
	__u32		relocs_num;
	__u32                pad;
};

struct drm_qxl_execbuffer {
	__u32		flags;		/* for future use */
	__u32		commands_num;
	__u64		commands;	/* struct drm_qxl_command* */
};

struct drm_qxl_update_area {
	__u32 handle;
	__u32 top;
	__u32 left;
	__u32 bottom;
	__u32 right;
	__u32 pad;
};

#define QXL_PARAM_NUM_SURFACES 1 /* rom->n_surfaces */
#define QXL_PARAM_MAX_RELOCS 2
struct drm_qxl_getparam {
	__u64 param;
	__u64 value;
};

/* these are one bit values */
struct drm_qxl_clientcap {
	__u32 index;
	__u32 pad;
};

struct drm_qxl_alloc_surf {
	__u32 format;
	__u32 width;
	__u32 height;
	__s32 stride;
	__u32 handle;
	__u32 pad;
};

#define DRM_IOCTL_QXL_ALLOC \
	DRM_IOWR(DRM_COMMAND_BASE + DRM_QXL_ALLOC, struct drm_qxl_alloc)

#define DRM_IOCTL_QXL_MAP \
	DRM_IOWR(DRM_COMMAND_BASE + DRM_QXL_MAP, struct drm_qxl_map)

#define DRM_IOCTL_QXL_EXECBUFFER \
	DRM_IOW(DRM_COMMAND_BASE + DRM_QXL_EXECBUFFER,\
		struct drm_qxl_execbuffer)

#define DRM_IOCTL_QXL_UPDATE_AREA \
	DRM_IOW(DRM_COMMAND_BASE + DRM_QXL_UPDATE_AREA,\
		struct drm_qxl_update_area)

#define DRM_IOCTL_QXL_GETPARAM \
	DRM_IOWR(DRM_COMMAND_BASE + DRM_QXL_GETPARAM,\
		struct drm_qxl_getparam)

#define DRM_IOCTL_QXL_CLIENTCAP \
	DRM_IOW(DRM_COMMAND_BASE + DRM_QXL_CLIENTCAP,\
		struct drm_qxl_clientcap)

#define DRM_IOCTL_QXL_ALLOC_SURF \
	DRM_IOWR(DRM_COMMAND_BASE + DRM_QXL_ALLOC_SURF,\
		struct drm_qxl_alloc_surf)

#if defined(__cplusplus)
}
#endif

#endif

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