xref: /OK3568_Linux_fs/kernel/drivers/gpu/drm/mga/mga_drv.h (revision 4882a59341e53eb6f0b4789bf948001014eff981)

/* mga_drv.h -- Private header for the Matrox G200/G400 driver -*- linux-c -*-
 * Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * 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
 * VA LINUX SYSTEMS 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 <gareth@valinux.com>
 */

#ifndef __MGA_DRV_H__
#define __MGA_DRV_H__

#include <linux/irqreturn.h>
#include <linux/pci.h>
#include <linux/slab.h>

#include <drm/drm_agpsupport.h>
#include <drm/drm_device.h>
#include <drm/drm_file.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_irq.h>
#include <drm/drm_legacy.h>
#include <drm/drm_print.h>
#include <drm/drm_sarea.h>
#include <drm/drm_vblank.h>
#include <drm/mga_drm.h>

/* General customization:
 */

#define DRIVER_AUTHOR		"Gareth Hughes, VA Linux Systems Inc."

#define DRIVER_NAME		"mga"
#define DRIVER_DESC		"Matrox G200/G400"
#define DRIVER_DATE		"20051102"

#define DRIVER_MAJOR		3
#define DRIVER_MINOR		2
#define DRIVER_PATCHLEVEL	1

typedef struct drm_mga_primary_buffer {
	u8 *start;
	u8 *end;
	int size;

	u32 tail;
	int space;
	volatile long wrapped;

	volatile u32 *status;

	u32 last_flush;
	u32 last_wrap;

	u32 high_mark;
} drm_mga_primary_buffer_t;

typedef struct drm_mga_freelist {
	struct drm_mga_freelist *next;
	struct drm_mga_freelist *prev;
	drm_mga_age_t age;
	struct drm_buf *buf;
} drm_mga_freelist_t;

typedef struct {
	drm_mga_freelist_t *list_entry;
	int discard;
	int dispatched;
} drm_mga_buf_priv_t;

typedef struct drm_mga_private {
	drm_mga_primary_buffer_t prim;
	drm_mga_sarea_t *sarea_priv;

	drm_mga_freelist_t *head;
	drm_mga_freelist_t *tail;

	unsigned int warp_pipe;
	unsigned long warp_pipe_phys[MGA_MAX_WARP_PIPES];

	int chipset;
	int usec_timeout;

	/**
	 * If set, the new DMA initialization sequence was used.  This is
	 * primarilly used to select how the driver should uninitialized its
	 * internal DMA structures.
	 */
	int used_new_dma_init;

	/**
	 * If AGP memory is used for DMA buffers, this will be the value
	 * \c MGA_PAGPXFER.  Otherwise, it will be zero (for a PCI transfer).
	 */
	u32 dma_access;

	/**
	 * If AGP memory is used for DMA buffers, this will be the value
	 * \c MGA_WAGP_ENABLE.  Otherwise, it will be zero (for a PCI
	 * transfer).
	 */
	u32 wagp_enable;

	/**
	 * \name MMIO region parameters.
	 *
	 * \sa drm_mga_private_t::mmio
	 */
	/*@{ */
	resource_size_t mmio_base;	   /**< Bus address of base of MMIO. */
	resource_size_t mmio_size;	   /**< Size of the MMIO region. */
	/*@} */

	u32 clear_cmd;
	u32 maccess;

	atomic_t vbl_received;          /**< Number of vblanks received. */
	wait_queue_head_t fence_queue;
	atomic_t last_fence_retired;
	u32 next_fence_to_post;

	unsigned int fb_cpp;
	unsigned int front_offset;
	unsigned int front_pitch;
	unsigned int back_offset;
	unsigned int back_pitch;

	unsigned int depth_cpp;
	unsigned int depth_offset;
	unsigned int depth_pitch;

	unsigned int texture_offset;
	unsigned int texture_size;

	drm_local_map_t *sarea;
	drm_local_map_t *mmio;
	drm_local_map_t *status;
	drm_local_map_t *warp;
	drm_local_map_t *primary;
	drm_local_map_t *agp_textures;

	unsigned long agp_handle;
	unsigned int agp_size;
} drm_mga_private_t;

extern const struct drm_ioctl_desc mga_ioctls[];
extern int mga_max_ioctl;

				/* mga_dma.c */
extern int mga_dma_bootstrap(struct drm_device *dev, void *data,
			     struct drm_file *file_priv);
extern int mga_dma_init(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int mga_getparam(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
extern int mga_dma_flush(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int mga_dma_reset(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int mga_dma_buffers(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);
extern int mga_driver_load(struct drm_device *dev, unsigned long flags);
extern void mga_driver_unload(struct drm_device *dev);
extern void mga_driver_lastclose(struct drm_device *dev);
extern int mga_driver_dma_quiescent(struct drm_device *dev);

extern int mga_do_wait_for_idle(drm_mga_private_t *dev_priv);

extern void mga_do_dma_flush(drm_mga_private_t *dev_priv);
extern void mga_do_dma_wrap_start(drm_mga_private_t *dev_priv);
extern void mga_do_dma_wrap_end(drm_mga_private_t *dev_priv);

extern int mga_freelist_put(struct drm_device *dev, struct drm_buf *buf);

				/* mga_warp.c */
extern int mga_warp_install_microcode(drm_mga_private_t *dev_priv);
extern int mga_warp_init(drm_mga_private_t *dev_priv);

				/* mga_irq.c */
extern int mga_enable_vblank(struct drm_device *dev, unsigned int pipe);
extern void mga_disable_vblank(struct drm_device *dev, unsigned int pipe);
extern u32 mga_get_vblank_counter(struct drm_device *dev, unsigned int pipe);
extern void mga_driver_fence_wait(struct drm_device *dev, unsigned int *sequence);
extern int mga_driver_vblank_wait(struct drm_device *dev, unsigned int *sequence);
extern irqreturn_t mga_driver_irq_handler(int irq, void *arg);
extern void mga_driver_irq_preinstall(struct drm_device *dev);
extern int mga_driver_irq_postinstall(struct drm_device *dev);
extern void mga_driver_irq_uninstall(struct drm_device *dev);
extern long mga_compat_ioctl(struct file *filp, unsigned int cmd,
			     unsigned long arg);

#define mga_flush_write_combine()	wmb()

#define MGA_READ8(reg) \
	readb(((void __iomem *)dev_priv->mmio->handle) + (reg))
#define MGA_READ(reg) \
	readl(((void __iomem *)dev_priv->mmio->handle) + (reg))
#define MGA_WRITE8(reg, val) \
	writeb(val, ((void __iomem *)dev_priv->mmio->handle) + (reg))
#define MGA_WRITE(reg, val) \
	writel(val, ((void __iomem *)dev_priv->mmio->handle) + (reg))

#define DWGREG0		0x1c00
#define DWGREG0_END	0x1dff
#define DWGREG1		0x2c00
#define DWGREG1_END	0x2dff

#define ISREG0(r)	(r >= DWGREG0 && r <= DWGREG0_END)
#define DMAREG0(r)	(u8)((r - DWGREG0) >> 2)
#define DMAREG1(r)	(u8)(((r - DWGREG1) >> 2) | 0x80)
#define DMAREG(r)	(ISREG0(r) ? DMAREG0(r) : DMAREG1(r))

/* ================================================================
 * Helper macross...
 */

#define MGA_EMIT_STATE(dev_priv, dirty)					\
do {									\
	if ((dirty) & ~MGA_UPLOAD_CLIPRECTS) {				\
		if (dev_priv->chipset >= MGA_CARD_TYPE_G400)		\
			mga_g400_emit_state(dev_priv);			\
		else							\
			mga_g200_emit_state(dev_priv);			\
	}								\
} while (0)

#define WRAP_TEST_WITH_RETURN(dev_priv)					\
do {									\
	if (test_bit(0, &dev_priv->prim.wrapped)) {			\
		if (mga_is_idle(dev_priv)) {				\
			mga_do_dma_wrap_end(dev_priv);			\
		} else if (dev_priv->prim.space <			\
			   dev_priv->prim.high_mark) {			\
			if (MGA_DMA_DEBUG)				\
				DRM_INFO("wrap...\n");			\
			return -EBUSY;					\
		}							\
	}								\
} while (0)

#define WRAP_WAIT_WITH_RETURN(dev_priv)					\
do {									\
	if (test_bit(0, &dev_priv->prim.wrapped)) {			\
		if (mga_do_wait_for_idle(dev_priv) < 0) {		\
			if (MGA_DMA_DEBUG)				\
				DRM_INFO("wrap...\n");			\
			return -EBUSY;					\
		}							\
		mga_do_dma_wrap_end(dev_priv);				\
	}								\
} while (0)

/* ================================================================
 * Primary DMA command stream
 */

#define MGA_VERBOSE	0

#define DMA_LOCALS	unsigned int write; volatile u8 *prim;

#define DMA_BLOCK_SIZE	(5 * sizeof(u32))

#define BEGIN_DMA(n)							\
do {									\
	if (MGA_VERBOSE) {						\
		DRM_INFO("BEGIN_DMA(%d)\n", (n));			\
		DRM_INFO("   space=0x%x req=0x%zx\n",			\
			 dev_priv->prim.space, (n) * DMA_BLOCK_SIZE);	\
	}								\
	prim = dev_priv->prim.start;					\
	write = dev_priv->prim.tail;					\
} while (0)

#define BEGIN_DMA_WRAP()						\
do {									\
	if (MGA_VERBOSE) {						\
		DRM_INFO("BEGIN_DMA()\n");				\
		DRM_INFO("   space=0x%x\n", dev_priv->prim.space);	\
	}								\
	prim = dev_priv->prim.start;					\
	write = dev_priv->prim.tail;					\
} while (0)

#define ADVANCE_DMA()							\
do {									\
	dev_priv->prim.tail = write;					\
	if (MGA_VERBOSE)						\
		DRM_INFO("ADVANCE_DMA() tail=0x%05x sp=0x%x\n",		\
			 write, dev_priv->prim.space);			\
} while (0)

#define FLUSH_DMA()							\
do {									\
	if (0) {							\
		DRM_INFO("\n");						\
		DRM_INFO("   tail=0x%06x head=0x%06lx\n",		\
			 dev_priv->prim.tail,				\
			 (unsigned long)(MGA_READ(MGA_PRIMADDRESS) -	\
					 dev_priv->primary->offset));	\
	}								\
	if (!test_bit(0, &dev_priv->prim.wrapped)) {			\
		if (dev_priv->prim.space < dev_priv->prim.high_mark)	\
			mga_do_dma_wrap_start(dev_priv);		\
		else							\
			mga_do_dma_flush(dev_priv);			\
	}								\
} while (0)

/* Never use this, always use DMA_BLOCK(...) for primary DMA output.
 */
#define DMA_WRITE(offset, val)						\
do {									\
	if (MGA_VERBOSE)						\
		DRM_INFO("   DMA_WRITE( 0x%08x ) at 0x%04zx\n",		\
			 (u32)(val), write + (offset) * sizeof(u32));	\
	*(volatile u32 *)(prim + write + (offset) * sizeof(u32)) = val;	\
} while (0)

#define DMA_BLOCK(reg0, val0, reg1, val1, reg2, val2, reg3, val3)	\
do {									\
	DMA_WRITE(0, ((DMAREG(reg0) << 0) |				\
		      (DMAREG(reg1) << 8) |				\
		      (DMAREG(reg2) << 16) |				\
		      (DMAREG(reg3) << 24)));				\
	DMA_WRITE(1, val0);						\
	DMA_WRITE(2, val1);						\
	DMA_WRITE(3, val2);						\
	DMA_WRITE(4, val3);						\
	write += DMA_BLOCK_SIZE;					\
} while (0)

/* Buffer aging via primary DMA stream head pointer.
 */

#define SET_AGE(age, h, w)						\
do {									\
	(age)->head = h;						\
	(age)->wrap = w;						\
} while (0)

#define TEST_AGE(age, h, w)		((age)->wrap < w ||		\
					 ((age)->wrap == w &&		\
					  (age)->head < h))

#define AGE_BUFFER(buf_priv)						\
do {									\
	drm_mga_freelist_t *entry = (buf_priv)->list_entry;		\
	if ((buf_priv)->dispatched) {					\
		entry->age.head = (dev_priv->prim.tail +		\
				   dev_priv->primary->offset);		\
		entry->age.wrap = dev_priv->sarea_priv->last_wrap;	\
	} else {							\
		entry->age.head = 0;					\
		entry->age.wrap = 0;					\
	}								\
} while (0)

#define MGA_ENGINE_IDLE_MASK		(MGA_SOFTRAPEN |		\
					 MGA_DWGENGSTS |		\
					 MGA_ENDPRDMASTS)
#define MGA_DMA_IDLE_MASK		(MGA_SOFTRAPEN |		\
					 MGA_ENDPRDMASTS)

#define MGA_DMA_DEBUG			0

/* A reduced set of the mga registers.
 */
#define MGA_CRTC_INDEX			0x1fd4
#define MGA_CRTC_DATA			0x1fd5

/* CRTC11 */
#define MGA_VINTCLR			(1 << 4)
#define MGA_VINTEN			(1 << 5)

#define MGA_ALPHACTRL			0x2c7c
#define MGA_AR0				0x1c60
#define MGA_AR1				0x1c64
#define MGA_AR2				0x1c68
#define MGA_AR3				0x1c6c
#define MGA_AR4				0x1c70
#define MGA_AR5				0x1c74
#define MGA_AR6				0x1c78

#define MGA_CXBNDRY			0x1c80
#define MGA_CXLEFT			0x1ca0
#define MGA_CXRIGHT			0x1ca4

#define MGA_DMAPAD			0x1c54
#define MGA_DSTORG			0x2cb8
#define MGA_DWGCTL			0x1c00
#	define MGA_OPCOD_MASK			(15 << 0)
#	define MGA_OPCOD_TRAP			(4 << 0)
#	define MGA_OPCOD_TEXTURE_TRAP		(6 << 0)
#	define MGA_OPCOD_BITBLT			(8 << 0)
#	define MGA_OPCOD_ILOAD			(9 << 0)
#	define MGA_ATYPE_MASK			(7 << 4)
#	define MGA_ATYPE_RPL			(0 << 4)
#	define MGA_ATYPE_RSTR			(1 << 4)
#	define MGA_ATYPE_ZI			(3 << 4)
#	define MGA_ATYPE_BLK			(4 << 4)
#	define MGA_ATYPE_I			(7 << 4)
#	define MGA_LINEAR			(1 << 7)
#	define MGA_ZMODE_MASK			(7 << 8)
#	define MGA_ZMODE_NOZCMP			(0 << 8)
#	define MGA_ZMODE_ZE			(2 << 8)
#	define MGA_ZMODE_ZNE			(3 << 8)
#	define MGA_ZMODE_ZLT			(4 << 8)
#	define MGA_ZMODE_ZLTE			(5 << 8)
#	define MGA_ZMODE_ZGT			(6 << 8)
#	define MGA_ZMODE_ZGTE			(7 << 8)
#	define MGA_SOLID			(1 << 11)
#	define MGA_ARZERO			(1 << 12)
#	define MGA_SGNZERO			(1 << 13)
#	define MGA_SHIFTZERO			(1 << 14)
#	define MGA_BOP_MASK			(15 << 16)
#	define MGA_BOP_ZERO			(0 << 16)
#	define MGA_BOP_DST			(10 << 16)
#	define MGA_BOP_SRC			(12 << 16)
#	define MGA_BOP_ONE			(15 << 16)
#	define MGA_TRANS_SHIFT			20
#	define MGA_TRANS_MASK			(15 << 20)
#	define MGA_BLTMOD_MASK			(15 << 25)
#	define MGA_BLTMOD_BMONOLEF		(0 << 25)
#	define MGA_BLTMOD_BMONOWF		(4 << 25)
#	define MGA_BLTMOD_PLAN			(1 << 25)
#	define MGA_BLTMOD_BFCOL			(2 << 25)
#	define MGA_BLTMOD_BU32BGR		(3 << 25)
#	define MGA_BLTMOD_BU32RGB		(7 << 25)
#	define MGA_BLTMOD_BU24BGR		(11 << 25)
#	define MGA_BLTMOD_BU24RGB		(15 << 25)
#	define MGA_PATTERN			(1 << 29)
#	define MGA_TRANSC			(1 << 30)
#	define MGA_CLIPDIS			(1 << 31)
#define MGA_DWGSYNC			0x2c4c

#define MGA_FCOL			0x1c24
#define MGA_FIFOSTATUS			0x1e10
#define MGA_FOGCOL			0x1cf4
#define MGA_FXBNDRY			0x1c84
#define MGA_FXLEFT			0x1ca8
#define MGA_FXRIGHT			0x1cac

#define MGA_ICLEAR			0x1e18
#	define MGA_SOFTRAPICLR			(1 << 0)
#	define MGA_VLINEICLR			(1 << 5)
#define MGA_IEN				0x1e1c
#	define MGA_SOFTRAPIEN			(1 << 0)
#	define MGA_VLINEIEN			(1 << 5)

#define MGA_LEN				0x1c5c

#define MGA_MACCESS			0x1c04

#define MGA_PITCH			0x1c8c
#define MGA_PLNWT			0x1c1c
#define MGA_PRIMADDRESS			0x1e58
#	define MGA_DMA_GENERAL			(0 << 0)
#	define MGA_DMA_BLIT			(1 << 0)
#	define MGA_DMA_VECTOR			(2 << 0)
#	define MGA_DMA_VERTEX			(3 << 0)
#define MGA_PRIMEND			0x1e5c
#	define MGA_PRIMNOSTART			(1 << 0)
#	define MGA_PAGPXFER			(1 << 1)
#define MGA_PRIMPTR			0x1e50
#	define MGA_PRIMPTREN0			(1 << 0)
#	define MGA_PRIMPTREN1			(1 << 1)

#define MGA_RST				0x1e40
#	define MGA_SOFTRESET			(1 << 0)
#	define MGA_SOFTEXTRST			(1 << 1)

#define MGA_SECADDRESS			0x2c40
#define MGA_SECEND			0x2c44
#define MGA_SETUPADDRESS		0x2cd0
#define MGA_SETUPEND			0x2cd4
#define MGA_SGN				0x1c58
#define MGA_SOFTRAP			0x2c48
#define MGA_SRCORG			0x2cb4
#	define MGA_SRMMAP_MASK			(1 << 0)
#	define MGA_SRCMAP_FB			(0 << 0)
#	define MGA_SRCMAP_SYSMEM		(1 << 0)
#	define MGA_SRCACC_MASK			(1 << 1)
#	define MGA_SRCACC_PCI			(0 << 1)
#	define MGA_SRCACC_AGP			(1 << 1)
#define MGA_STATUS			0x1e14
#	define MGA_SOFTRAPEN			(1 << 0)
#	define MGA_VSYNCPEN			(1 << 4)
#	define MGA_VLINEPEN			(1 << 5)
#	define MGA_DWGENGSTS			(1 << 16)
#	define MGA_ENDPRDMASTS			(1 << 17)
#define MGA_STENCIL			0x2cc8
#define MGA_STENCILCTL			0x2ccc

#define MGA_TDUALSTAGE0			0x2cf8
#define MGA_TDUALSTAGE1			0x2cfc
#define MGA_TEXBORDERCOL		0x2c5c
#define MGA_TEXCTL			0x2c30
#define MGA_TEXCTL2			0x2c3c
#	define MGA_DUALTEX			(1 << 7)
#	define MGA_G400_TC2_MAGIC		(1 << 15)
#	define MGA_MAP1_ENABLE			(1 << 31)
#define MGA_TEXFILTER			0x2c58
#define MGA_TEXHEIGHT			0x2c2c
#define MGA_TEXORG			0x2c24
#	define MGA_TEXORGMAP_MASK		(1 << 0)
#	define MGA_TEXORGMAP_FB			(0 << 0)
#	define MGA_TEXORGMAP_SYSMEM		(1 << 0)
#	define MGA_TEXORGACC_MASK		(1 << 1)
#	define MGA_TEXORGACC_PCI		(0 << 1)
#	define MGA_TEXORGACC_AGP		(1 << 1)
#define MGA_TEXORG1			0x2ca4
#define MGA_TEXORG2			0x2ca8
#define MGA_TEXORG3			0x2cac
#define MGA_TEXORG4			0x2cb0
#define MGA_TEXTRANS			0x2c34
#define MGA_TEXTRANSHIGH		0x2c38
#define MGA_TEXWIDTH			0x2c28

#define MGA_WACCEPTSEQ			0x1dd4
#define MGA_WCODEADDR			0x1e6c
#define MGA_WFLAG			0x1dc4
#define MGA_WFLAG1			0x1de0
#define MGA_WFLAGNB			0x1e64
#define MGA_WFLAGNB1			0x1e08
#define MGA_WGETMSB			0x1dc8
#define MGA_WIADDR			0x1dc0
#define MGA_WIADDR2			0x1dd8
#	define MGA_WMODE_SUSPEND		(0 << 0)
#	define MGA_WMODE_RESUME			(1 << 0)
#	define MGA_WMODE_JUMP			(2 << 0)
#	define MGA_WMODE_START			(3 << 0)
#	define MGA_WAGP_ENABLE			(1 << 2)
#define MGA_WMISC			0x1e70
#	define MGA_WUCODECACHE_ENABLE		(1 << 0)
#	define MGA_WMASTER_ENABLE		(1 << 1)
#	define MGA_WCACHEFLUSH_ENABLE		(1 << 3)
#define MGA_WVRTXSZ			0x1dcc

#define MGA_YBOT			0x1c9c
#define MGA_YDST			0x1c90
#define MGA_YDSTLEN			0x1c88
#define MGA_YDSTORG			0x1c94
#define MGA_YTOP			0x1c98

#define MGA_ZORG			0x1c0c

/* This finishes the current batch of commands
 */
#define MGA_EXEC			0x0100

/* AGP PLL encoding (for G200 only).
 */
#define MGA_AGP_PLL			0x1e4c
#	define MGA_AGP2XPLL_DISABLE		(0 << 0)
#	define MGA_AGP2XPLL_ENABLE		(1 << 0)

/* Warp registers
 */
#define MGA_WR0				0x2d00
#define MGA_WR1				0x2d04
#define MGA_WR2				0x2d08
#define MGA_WR3				0x2d0c
#define MGA_WR4				0x2d10
#define MGA_WR5				0x2d14
#define MGA_WR6				0x2d18
#define MGA_WR7				0x2d1c
#define MGA_WR8				0x2d20
#define MGA_WR9				0x2d24
#define MGA_WR10			0x2d28
#define MGA_WR11			0x2d2c
#define MGA_WR12			0x2d30
#define MGA_WR13			0x2d34
#define MGA_WR14			0x2d38
#define MGA_WR15			0x2d3c
#define MGA_WR16			0x2d40
#define MGA_WR17			0x2d44
#define MGA_WR18			0x2d48
#define MGA_WR19			0x2d4c
#define MGA_WR20			0x2d50
#define MGA_WR21			0x2d54
#define MGA_WR22			0x2d58
#define MGA_WR23			0x2d5c
#define MGA_WR24			0x2d60
#define MGA_WR25			0x2d64
#define MGA_WR26			0x2d68
#define MGA_WR27			0x2d6c
#define MGA_WR28			0x2d70
#define MGA_WR29			0x2d74
#define MGA_WR30			0x2d78
#define MGA_WR31			0x2d7c
#define MGA_WR32			0x2d80
#define MGA_WR33			0x2d84
#define MGA_WR34			0x2d88
#define MGA_WR35			0x2d8c
#define MGA_WR36			0x2d90
#define MGA_WR37			0x2d94
#define MGA_WR38			0x2d98
#define MGA_WR39			0x2d9c
#define MGA_WR40			0x2da0
#define MGA_WR41			0x2da4
#define MGA_WR42			0x2da8
#define MGA_WR43			0x2dac
#define MGA_WR44			0x2db0
#define MGA_WR45			0x2db4
#define MGA_WR46			0x2db8
#define MGA_WR47			0x2dbc
#define MGA_WR48			0x2dc0
#define MGA_WR49			0x2dc4
#define MGA_WR50			0x2dc8
#define MGA_WR51			0x2dcc
#define MGA_WR52			0x2dd0
#define MGA_WR53			0x2dd4
#define MGA_WR54			0x2dd8
#define MGA_WR55			0x2ddc
#define MGA_WR56			0x2de0
#define MGA_WR57			0x2de4
#define MGA_WR58			0x2de8
#define MGA_WR59			0x2dec
#define MGA_WR60			0x2df0
#define MGA_WR61			0x2df4
#define MGA_WR62			0x2df8
#define MGA_WR63			0x2dfc
#	define MGA_G400_WR_MAGIC		(1 << 6)
#	define MGA_G400_WR56_MAGIC		0x46480000	/* 12800.0f */

#define MGA_ILOAD_ALIGN		64
#define MGA_ILOAD_MASK		(MGA_ILOAD_ALIGN - 1)

#define MGA_DWGCTL_FLUSH	(MGA_OPCOD_TEXTURE_TRAP |		\
				 MGA_ATYPE_I |				\
				 MGA_ZMODE_NOZCMP |			\
				 MGA_ARZERO |				\
				 MGA_SGNZERO |				\
				 MGA_BOP_SRC |				\
				 (15 << MGA_TRANS_SHIFT))

#define MGA_DWGCTL_CLEAR	(MGA_OPCOD_TRAP |			\
				 MGA_ZMODE_NOZCMP |			\
				 MGA_SOLID |				\
				 MGA_ARZERO |				\
				 MGA_SGNZERO |				\
				 MGA_SHIFTZERO |			\
				 MGA_BOP_SRC |				\
				 (0 << MGA_TRANS_SHIFT) |		\
				 MGA_BLTMOD_BMONOLEF |			\
				 MGA_TRANSC |				\
				 MGA_CLIPDIS)

#define MGA_DWGCTL_COPY		(MGA_OPCOD_BITBLT |			\
				 MGA_ATYPE_RPL |			\
				 MGA_SGNZERO |				\
				 MGA_SHIFTZERO |			\
				 MGA_BOP_SRC |				\
				 (0 << MGA_TRANS_SHIFT) |		\
				 MGA_BLTMOD_BFCOL |			\
				 MGA_CLIPDIS)

/* Simple idle test.
 */
static __inline__ int mga_is_idle(drm_mga_private_t *dev_priv)
{
	u32 status = MGA_READ(MGA_STATUS) & MGA_ENGINE_IDLE_MASK;
	return (status == MGA_ENDPRDMASTS);
}

#endif