gamma.h

这个linux源代码是很全面的~基本完整了~使用c编译的~由于时间问题我没有亲自测试~但就算用来做参考资料也是非常好的

/* gamma.c -- 3dlabs GMX 2000 driver -*- linux-c -*-
 * Created: Mon Jan  4 08:58:31 1999 by [e-mail]
 *
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * 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
 * PRECISION INSIGHT 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.
 *
 * Authors:
 *    Gareth Hughes <[e-mail]>
 */

#ifndef __GAMMA_H__
#define __GAMMA_H__

/* This remains constant for all DRM template files.
 */
#define DRM(x) gamma_##x

/* General customization:
 */
#define __HAVE_MTRR			1

#define DRIVER_AUTHOR		"VA Linux Systems Inc."

#define DRIVER_NAME		"gamma"
#define DRIVER_DESC		"3DLabs gamma"
#define DRIVER_DATE		"20010624"

#define DRIVER_MAJOR		2
#define DRIVER_MINOR		0
#define DRIVER_PATCHLEVEL	0

#define DRIVER_IOCTLS							  \
	[DRM_IOCTL_NR(DRM_IOCTL_DMA)]	     = { gamma_dma,	  1, 0 }, \
	[DRM_IOCTL_NR(DRM_IOCTL_GAMMA_INIT)] = { gamma_dma_init,  1, 1 }, \
	[DRM_IOCTL_NR(DRM_IOCTL_GAMMA_COPY)] = { gamma_dma_copy,  1, 1 }

#define IOCTL_TABLE_NAME	DRM(ioctls)
#define IOCTL_FUNC_NAME 	DRM(ioctl)

#define __HAVE_COUNTERS		5
#define __HAVE_COUNTER6		_DRM_STAT_IRQ
#define __HAVE_COUNTER7		_DRM_STAT_DMA
#define __HAVE_COUNTER8		_DRM_STAT_PRIMARY
#define __HAVE_COUNTER9		_DRM_STAT_SPECIAL
#define __HAVE_COUNTER10	_DRM_STAT_MISSED

/* DMA customization:
 */
#define __HAVE_DMA			1
#define __HAVE_AGP			1
#define __MUST_HAVE_AGP			0
#define __HAVE_OLD_DMA			1
#define __HAVE_PCI_DMA			1

#define __HAVE_MULTIPLE_DMA_QUEUES	1
#define __HAVE_DMA_WAITQUEUE		1

#define __HAVE_DMA_WAITLIST		1
#define __HAVE_DMA_FREELIST		1

#define __HAVE_DMA_FLUSH		1
#define __HAVE_DMA_SCHEDULE		1

#define __HAVE_DMA_READY		1
#define DRIVER_DMA_READY() do {						\
	gamma_dma_ready(dev);						\
} while (0)

#define __HAVE_DMA_QUIESCENT		1
#define DRIVER_DMA_QUIESCENT() do {					\
	/* FIXME ! */ 							\
	gamma_dma_quiescent_single(dev);					\
	return 0;							\
} while (0)

#define __HAVE_DMA_IRQ			1
#define __HAVE_DMA_IRQ_BH		1

#if 1
#define DRIVER_PREINSTALL() do {					\
	drm_gamma_private_t *dev_priv =					\
				(drm_gamma_private_t *)dev->dev_private;\
	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2) cpu_relax();		\
	GAMMA_WRITE( GAMMA_GCOMMANDMODE,	0x00000004 );		\
	GAMMA_WRITE( GAMMA_GDMACONTROL,		0x00000000 );		\
} while (0)
#define DRIVER_POSTINSTALL() do {					\
	drm_gamma_private_t *dev_priv =					\
				(drm_gamma_private_t *)dev->dev_private;\
	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2) cpu_relax();		\
	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 3) cpu_relax();		\
	GAMMA_WRITE( GAMMA_GINTENABLE,		0x00002001 );		\
	GAMMA_WRITE( GAMMA_COMMANDINTENABLE,	0x00000008 );		\
	GAMMA_WRITE( GAMMA_GDELAYTIMER,		0x00039090 );		\
} while (0)
#else
#define DRIVER_POSTINSTALL() do {					\
	drm_gamma_private_t *dev_priv =					\
				(drm_gamma_private_t *)dev->dev_private;\
	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2) cpu_relax();		\
	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2) cpu_relax();		\
	GAMMA_WRITE( GAMMA_GINTENABLE,		0x00002000 );		\
	GAMMA_WRITE( GAMMA_COMMANDINTENABLE,	0x00000004 );		\
} while (0)

#define DRIVER_PREINSTALL() do {					\
	drm_gamma_private_t *dev_priv =					\
				(drm_gamma_private_t *)dev->dev_private;\
	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2) cpu_relax();		\
	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2) cpu_relax();		\
	GAMMA_WRITE( GAMMA_GCOMMANDMODE,	GAMMA_QUEUED_DMA_MODE );\
	GAMMA_WRITE( GAMMA_GDMACONTROL,		0x00000000 );\
} while (0)
#endif

#define DRIVER_UNINSTALL() do {						\
	drm_gamma_private_t *dev_priv =					\
				(drm_gamma_private_t *)dev->dev_private;\
	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2) cpu_relax();		\
	while(GAMMA_READ(GAMMA_INFIFOSPACE) < 3) cpu_relax();		\
	GAMMA_WRITE( GAMMA_GDELAYTIMER,		0x00000000 );		\
	GAMMA_WRITE( GAMMA_COMMANDINTENABLE,	0x00000000 );		\
	GAMMA_WRITE( GAMMA_GINTENABLE,		0x00000000 );		\
} while (0)

#define DRIVER_AGP_BUFFERS_MAP( dev )					\
	((drm_gamma_private_t *)((dev)->dev_private))->buffers

#endif /* __GAMMA_H__ */