drivers/gpu/drm/mga/mga_drv.h - kernel/common - Git at Google

 /* mga_drv.h -- Private header for the Matrox G200/G400 driver -*- linux-c -*-
  * Created: Mon Dec 13 01:50:01 1999 by [email protected]
  *
  * 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 <[email protected]>
  */

 #ifndef __MGA_DRV_H__
 #define __MGA_DRV_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 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_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 int 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, int crtc);
 extern void mga_disable_vblank(struct drm_device *dev, int crtc);
 extern u32 mga_get_vblank_counter(struct drm_device *dev, int crtc);
 extern int 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(DRM_IRQ_ARGS);
 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()	DRM_WRITEMEMORYBARRIER()

 #if defined(__linux__) && defined(__alpha__)
 #define MGA_BASE(reg)		((unsigned long)(dev_priv->mmio->handle))
 #define MGA_ADDR(reg)		(MGA_BASE(reg) + reg)

 #define MGA_DEREF(reg)		(*(volatile u32 *)MGA_ADDR(reg))
 #define MGA_DEREF8(reg)		(*(volatile u8 *)MGA_ADDR(reg))

 #define MGA_READ(reg)		(_MGA_READ((u32 *)MGA_ADDR(reg)))
 #define MGA_READ8(reg)		(_MGA_READ((u8 *)MGA_ADDR(reg)))
 #define MGA_WRITE(reg, val)	do { DRM_WRITEMEMORYBARRIER(); MGA_DEREF(reg) = val; } while (0)
 #define MGA_WRITE8(reg, val)	do { DRM_WRITEMEMORYBARRIER(); MGA_DEREF8(reg) = val; } while (0)

 static inline u32 _MGA_READ(u32 *addr)
 {
 	DRM_MEMORYBARRIER();
 	return *(volatile u32 *)addr;
 }
 #else
 #define MGA_READ8(reg)		DRM_READ8(dev_priv->mmio, (reg))
 #define MGA_READ(reg)		DRM_READ32(dev_priv->mmio, (reg))
 #define MGA_WRITE8(reg, val)	DRM_WRITE8(dev_priv->mmio, (reg), (val))
 #define MGA_WRITE(reg, val)	DRM_WRITE32(dev_priv->mmio, (reg), (val))
 #endif

 #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
	/* mga_drv.h -- Private header for the Matrox G200/G400 driver -- linux-c --
	* Created: Mon Dec 13 01:50:01 1999 by [email protected]
	*
	* 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 <[email protected]>
	*/

	#ifndef __MGA_DRV_H__
	#define __MGA_DRV_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 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_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 int 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, int crtc);
	extern void mga_disable_vblank(struct drm_device *dev, int crtc);
	extern u32 mga_get_vblank_counter(struct drm_device *dev, int crtc);
	extern int 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(DRM_IRQ_ARGS);
	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() DRM_WRITEMEMORYBARRIER()

	#if defined(__linux__) && defined(__alpha__)
	#define MGA_BASE(reg) ((unsigned long)(dev_priv->mmio->handle))
	#define MGA_ADDR(reg) (MGA_BASE(reg) + reg)

	#define MGA_DEREF(reg) ((volatile u32 )MGA_ADDR(reg))
	#define MGA_DEREF8(reg) ((volatile u8 )MGA_ADDR(reg))

	#define MGA_READ(reg) (_MGA_READ((u32 *)MGA_ADDR(reg)))
	#define MGA_READ8(reg) (_MGA_READ((u8 *)MGA_ADDR(reg)))
	#define MGA_WRITE(reg, val) do { DRM_WRITEMEMORYBARRIER(); MGA_DEREF(reg) = val; } while (0)
	#define MGA_WRITE8(reg, val) do { DRM_WRITEMEMORYBARRIER(); MGA_DEREF8(reg) = val; } while (0)

	static inline u32 _MGA_READ(u32 *addr)
	{
	DRM_MEMORYBARRIER();
	return (volatile u32 )addr;
	}
	#else
	#define MGA_READ8(reg) DRM_READ8(dev_priv->mmio, (reg))
	#define MGA_READ(reg) DRM_READ32(dev_priv->mmio, (reg))
	#define MGA_WRITE8(reg, val) DRM_WRITE8(dev_priv->mmio, (reg), (val))
	#define MGA_WRITE(reg, val) DRM_WRITE32(dev_priv->mmio, (reg), (val))
	#endif

	#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