drivers/gpu/drm/r128/r128_drv.h - third_party/kernel - Git at Google

 /* r128_drv.h -- Private header for r128 driver -*- linux-c -*-
  * Created: Mon Dec 13 09:51:11 1999 by faith@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
  * 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:
  *    Rickard E. (Rik) Faith <faith@valinux.com>
  *    Kevin E. Martin <martin@valinux.com>
  *    Gareth Hughes <gareth@valinux.com>
  *    Michel Dänzer <daenzerm@student.ethz.ch>
  */

 #ifndef __R128_DRV_H__
 #define __R128_DRV_H__

 #include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/irqreturn.h>

 #include <drm/drm_ioctl.h>
 #include <drm/drm_legacy.h>
 #include <drm/r128_drm.h>

 #include "ati_pcigart.h"

 /* General customization:
  */
 #define DRIVER_AUTHOR		"Gareth Hughes, VA Linux Systems Inc."

 #define DRIVER_NAME		"r128"
 #define DRIVER_DESC		"ATI Rage 128"
 #define DRIVER_DATE		"20030725"

 /* Interface history:
  *
  * ??  - ??
  * 2.4 - Add support for ycbcr textures (no new ioctls)
  * 2.5 - Add FLIP ioctl, disable FULLSCREEN.
  */
 #define DRIVER_MAJOR		2
 #define DRIVER_MINOR		5
 #define DRIVER_PATCHLEVEL	0

 #define GET_RING_HEAD(dev_priv)		R128_READ(R128_PM4_BUFFER_DL_RPTR)

 typedef struct drm_r128_freelist {
 	unsigned int age;
 	struct drm_buf *buf;
 	struct drm_r128_freelist *next;
 	struct drm_r128_freelist *prev;
 } drm_r128_freelist_t;

 typedef struct drm_r128_ring_buffer {
 	u32 *start;
 	u32 *end;
 	int size;
 	int size_l2qw;

 	u32 tail;
 	u32 tail_mask;
 	int space;

 	int high_mark;
 } drm_r128_ring_buffer_t;

 typedef struct drm_r128_private {
 	drm_r128_ring_buffer_t ring;
 	drm_r128_sarea_t *sarea_priv;

 	int cce_mode;
 	int cce_fifo_size;
 	int cce_running;

 	drm_r128_freelist_t *head;
 	drm_r128_freelist_t *tail;

 	int usec_timeout;
 	int is_pci;
 	unsigned long cce_buffers_offset;

 	atomic_t idle_count;

 	int page_flipping;
 	int current_page;
 	u32 crtc_offset;
 	u32 crtc_offset_cntl;

 	atomic_t vbl_received;

 	u32 color_fmt;
 	unsigned int front_offset;
 	unsigned int front_pitch;
 	unsigned int back_offset;
 	unsigned int back_pitch;

 	u32 depth_fmt;
 	unsigned int depth_offset;
 	unsigned int depth_pitch;
 	unsigned int span_offset;

 	u32 front_pitch_offset_c;
 	u32 back_pitch_offset_c;
 	u32 depth_pitch_offset_c;
 	u32 span_pitch_offset_c;

 	drm_local_map_t *sarea;
 	drm_local_map_t *mmio;
 	drm_local_map_t *cce_ring;
 	drm_local_map_t *ring_rptr;
 	drm_local_map_t *agp_textures;
 	struct drm_ati_pcigart_info gart_info;
 } drm_r128_private_t;

 typedef struct drm_r128_buf_priv {
 	u32 age;
 	int prim;
 	int discard;
 	int dispatched;
 	drm_r128_freelist_t *list_entry;
 } drm_r128_buf_priv_t;

 extern const struct drm_ioctl_desc r128_ioctls[];
 extern int r128_max_ioctl;

 				/* r128_cce.c */
 extern int r128_cce_init(struct drm_device *dev, void *data, struct drm_file *file_priv);
 extern int r128_cce_start(struct drm_device *dev, void *data, struct drm_file *file_priv);
 extern int r128_cce_stop(struct drm_device *dev, void *data, struct drm_file *file_priv);
 extern int r128_cce_reset(struct drm_device *dev, void *data, struct drm_file *file_priv);
 extern int r128_cce_idle(struct drm_device *dev, void *data, struct drm_file *file_priv);
 extern int r128_engine_reset(struct drm_device *dev, void *data, struct drm_file *file_priv);
 extern int r128_fullscreen(struct drm_device *dev, void *data, struct drm_file *file_priv);
 extern int r128_cce_buffers(struct drm_device *dev, void *data, struct drm_file *file_priv);

 extern int r128_cce_stipple(struct drm_device *dev, void *data, struct drm_file *file_priv);
 extern int r128_cce_depth(struct drm_device *dev, void *data, struct drm_file *file_priv);
 extern int r128_getparam(struct drm_device *dev, void *data, struct drm_file *file_priv);

 extern void r128_freelist_reset(struct drm_device *dev);

 extern int r128_wait_ring(drm_r128_private_t *dev_priv, int n);

 extern int r128_do_cce_idle(drm_r128_private_t *dev_priv);
 extern int r128_do_cleanup_cce(struct drm_device *dev);

 extern int r128_enable_vblank(struct drm_device *dev, unsigned int pipe);
 extern void r128_disable_vblank(struct drm_device *dev, unsigned int pipe);
 extern u32 r128_get_vblank_counter(struct drm_device *dev, unsigned int pipe);
 extern irqreturn_t r128_driver_irq_handler(int irq, void *arg);
 extern void r128_driver_irq_preinstall(struct drm_device *dev);
 extern int r128_driver_irq_postinstall(struct drm_device *dev);
 extern void r128_driver_irq_uninstall(struct drm_device *dev);
 extern void r128_driver_lastclose(struct drm_device *dev);
 extern int r128_driver_load(struct drm_device *dev, unsigned long flags);
 extern void r128_driver_preclose(struct drm_device *dev,
 				 struct drm_file *file_priv);

 extern long r128_compat_ioctl(struct file *filp, unsigned int cmd,
 			      unsigned long arg);

 /* Register definitions, register access macros and drmAddMap constants
  * for Rage 128 kernel driver.
  */

 #define R128_AUX_SC_CNTL		0x1660
 #	define R128_AUX1_SC_EN			(1 << 0)
 #	define R128_AUX1_SC_MODE_OR		(0 << 1)
 #	define R128_AUX1_SC_MODE_NAND		(1 << 1)
 #	define R128_AUX2_SC_EN			(1 << 2)
 #	define R128_AUX2_SC_MODE_OR		(0 << 3)
 #	define R128_AUX2_SC_MODE_NAND		(1 << 3)
 #	define R128_AUX3_SC_EN			(1 << 4)
 #	define R128_AUX3_SC_MODE_OR		(0 << 5)
 #	define R128_AUX3_SC_MODE_NAND		(1 << 5)
 #define R128_AUX1_SC_LEFT		0x1664
 #define R128_AUX1_SC_RIGHT		0x1668
 #define R128_AUX1_SC_TOP		0x166c
 #define R128_AUX1_SC_BOTTOM		0x1670
 #define R128_AUX2_SC_LEFT		0x1674
 #define R128_AUX2_SC_RIGHT		0x1678
 #define R128_AUX2_SC_TOP		0x167c
 #define R128_AUX2_SC_BOTTOM		0x1680
 #define R128_AUX3_SC_LEFT		0x1684
 #define R128_AUX3_SC_RIGHT		0x1688
 #define R128_AUX3_SC_TOP		0x168c
 #define R128_AUX3_SC_BOTTOM		0x1690

 #define R128_BRUSH_DATA0		0x1480
 #define R128_BUS_CNTL			0x0030
 #	define R128_BUS_MASTER_DIS		(1 << 6)

 #define R128_CLOCK_CNTL_INDEX		0x0008
 #define R128_CLOCK_CNTL_DATA		0x000c
 #	define R128_PLL_WR_EN			(1 << 7)
 #define R128_CONSTANT_COLOR_C		0x1d34
 #define R128_CRTC_OFFSET		0x0224
 #define R128_CRTC_OFFSET_CNTL		0x0228
 #	define R128_CRTC_OFFSET_FLIP_CNTL	(1 << 16)

 #define R128_DP_GUI_MASTER_CNTL		0x146c
 #       define R128_GMC_SRC_PITCH_OFFSET_CNTL	(1    <<  0)
 #       define R128_GMC_DST_PITCH_OFFSET_CNTL	(1    <<  1)
 #	define R128_GMC_BRUSH_SOLID_COLOR	(13   <<  4)
 #	define R128_GMC_BRUSH_NONE		(15   <<  4)
 #	define R128_GMC_DST_16BPP		(4    <<  8)
 #	define R128_GMC_DST_24BPP		(5    <<  8)
 #	define R128_GMC_DST_32BPP		(6    <<  8)
 #       define R128_GMC_DST_DATATYPE_SHIFT	8
 #	define R128_GMC_SRC_DATATYPE_COLOR	(3    << 12)
 #	define R128_DP_SRC_SOURCE_MEMORY	(2    << 24)
 #	define R128_DP_SRC_SOURCE_HOST_DATA	(3    << 24)
 #	define R128_GMC_CLR_CMP_CNTL_DIS	(1    << 28)
 #	define R128_GMC_AUX_CLIP_DIS		(1    << 29)
 #	define R128_GMC_WR_MSK_DIS		(1    << 30)
 #	define R128_ROP3_S			0x00cc0000
 #	define R128_ROP3_P			0x00f00000
 #define R128_DP_WRITE_MASK		0x16cc
 #define R128_DST_PITCH_OFFSET_C		0x1c80
 #	define R128_DST_TILE			(1 << 31)

 #define R128_GEN_INT_CNTL		0x0040
 #	define R128_CRTC_VBLANK_INT_EN		(1 <<  0)
 #define R128_GEN_INT_STATUS		0x0044
 #	define R128_CRTC_VBLANK_INT		(1 <<  0)
 #	define R128_CRTC_VBLANK_INT_AK		(1 <<  0)
 #define R128_GEN_RESET_CNTL		0x00f0
 #	define R128_SOFT_RESET_GUI		(1 <<  0)

 #define R128_GUI_SCRATCH_REG0		0x15e0
 #define R128_GUI_SCRATCH_REG1		0x15e4
 #define R128_GUI_SCRATCH_REG2		0x15e8
 #define R128_GUI_SCRATCH_REG3		0x15ec
 #define R128_GUI_SCRATCH_REG4		0x15f0
 #define R128_GUI_SCRATCH_REG5		0x15f4

 #define R128_GUI_STAT			0x1740
 #	define R128_GUI_FIFOCNT_MASK		0x0fff
 #	define R128_GUI_ACTIVE			(1 << 31)

 #define R128_MCLK_CNTL			0x000f
 #	define R128_FORCE_GCP			(1 << 16)
 #	define R128_FORCE_PIPE3D_CP		(1 << 17)
 #	define R128_FORCE_RCP			(1 << 18)

 #define R128_PC_GUI_CTLSTAT		0x1748
 #define R128_PC_NGUI_CTLSTAT		0x0184
 #	define R128_PC_FLUSH_GUI		(3 << 0)
 #	define R128_PC_RI_GUI			(1 << 2)
 #	define R128_PC_FLUSH_ALL		0x00ff
 #	define R128_PC_BUSY			(1 << 31)

 #define R128_PCI_GART_PAGE		0x017c
 #define R128_PRIM_TEX_CNTL_C		0x1cb0

 #define R128_SCALE_3D_CNTL		0x1a00
 #define R128_SEC_TEX_CNTL_C		0x1d00
 #define R128_SEC_TEXTURE_BORDER_COLOR_C	0x1d3c
 #define R128_SETUP_CNTL			0x1bc4
 #define R128_STEN_REF_MASK_C		0x1d40

 #define R128_TEX_CNTL_C			0x1c9c
 #	define R128_TEX_CACHE_FLUSH		(1 << 23)

 #define R128_WAIT_UNTIL			0x1720
 #	define R128_EVENT_CRTC_OFFSET		(1 << 0)
 #define R128_WINDOW_XY_OFFSET		0x1bcc

 /* CCE registers
  */
 #define R128_PM4_BUFFER_OFFSET		0x0700
 #define R128_PM4_BUFFER_CNTL		0x0704
 #	define R128_PM4_MASK			(15 << 28)
 #	define R128_PM4_NONPM4			(0  << 28)
 #	define R128_PM4_192PIO			(1  << 28)
 #	define R128_PM4_192BM			(2  << 28)
 #	define R128_PM4_128PIO_64INDBM		(3  << 28)
 #	define R128_PM4_128BM_64INDBM		(4  << 28)
 #	define R128_PM4_64PIO_128INDBM		(5  << 28)
 #	define R128_PM4_64BM_128INDBM		(6  << 28)
 #	define R128_PM4_64PIO_64VCBM_64INDBM	(7  << 28)
 #	define R128_PM4_64BM_64VCBM_64INDBM	(8  << 28)
 #	define R128_PM4_64PIO_64VCPIO_64INDPIO	(15 << 28)
 #	define R128_PM4_BUFFER_CNTL_NOUPDATE	(1  << 27)

 #define R128_PM4_BUFFER_WM_CNTL		0x0708
 #	define R128_WMA_SHIFT			0
 #	define R128_WMB_SHIFT			8
 #	define R128_WMC_SHIFT			16
 #	define R128_WB_WM_SHIFT			24

 #define R128_PM4_BUFFER_DL_RPTR_ADDR	0x070c
 #define R128_PM4_BUFFER_DL_RPTR		0x0710
 #define R128_PM4_BUFFER_DL_WPTR		0x0714
 #	define R128_PM4_BUFFER_DL_DONE		(1 << 31)

 #define R128_PM4_VC_FPU_SETUP		0x071c

 #define R128_PM4_IW_INDOFF		0x0738
 #define R128_PM4_IW_INDSIZE		0x073c

 #define R128_PM4_STAT			0x07b8
 #	define R128_PM4_FIFOCNT_MASK		0x0fff
 #	define R128_PM4_BUSY			(1 << 16)
 #	define R128_PM4_GUI_ACTIVE		(1 << 31)

 #define R128_PM4_MICROCODE_ADDR		0x07d4
 #define R128_PM4_MICROCODE_RADDR	0x07d8
 #define R128_PM4_MICROCODE_DATAH	0x07dc
 #define R128_PM4_MICROCODE_DATAL	0x07e0

 #define R128_PM4_BUFFER_ADDR		0x07f0
 #define R128_PM4_MICRO_CNTL		0x07fc
 #	define R128_PM4_MICRO_FREERUN		(1 << 30)

 #define R128_PM4_FIFO_DATA_EVEN		0x1000
 #define R128_PM4_FIFO_DATA_ODD		0x1004

 /* CCE command packets
  */
 #define R128_CCE_PACKET0		0x00000000
 #define R128_CCE_PACKET1		0x40000000
 #define R128_CCE_PACKET2		0x80000000
 #define R128_CCE_PACKET3		0xC0000000
 #	define R128_CNTL_HOSTDATA_BLT		0x00009400
 #	define R128_CNTL_PAINT_MULTI		0x00009A00
 #	define R128_CNTL_BITBLT_MULTI		0x00009B00
 #	define R128_3D_RNDR_GEN_INDX_PRIM	0x00002300

 #define R128_CCE_PACKET_MASK		0xC0000000
 #define R128_CCE_PACKET_COUNT_MASK	0x3fff0000
 #define R128_CCE_PACKET0_REG_MASK	0x000007ff
 #define R128_CCE_PACKET1_REG0_MASK	0x000007ff
 #define R128_CCE_PACKET1_REG1_MASK	0x003ff800

 #define R128_CCE_VC_CNTL_PRIM_TYPE_NONE		0x00000000
 #define R128_CCE_VC_CNTL_PRIM_TYPE_POINT	0x00000001
 #define R128_CCE_VC_CNTL_PRIM_TYPE_LINE		0x00000002
 #define R128_CCE_VC_CNTL_PRIM_TYPE_POLY_LINE	0x00000003
 #define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_LIST	0x00000004
 #define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_FAN	0x00000005
 #define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_STRIP	0x00000006
 #define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_TYPE2	0x00000007
 #define R128_CCE_VC_CNTL_PRIM_WALK_IND		0x00000010
 #define R128_CCE_VC_CNTL_PRIM_WALK_LIST		0x00000020
 #define R128_CCE_VC_CNTL_PRIM_WALK_RING		0x00000030
 #define R128_CCE_VC_CNTL_NUM_SHIFT		16

 #define R128_DATATYPE_VQ		0
 #define R128_DATATYPE_CI4		1
 #define R128_DATATYPE_CI8		2
 #define R128_DATATYPE_ARGB1555		3
 #define R128_DATATYPE_RGB565		4
 #define R128_DATATYPE_RGB888		5
 #define R128_DATATYPE_ARGB8888		6
 #define R128_DATATYPE_RGB332		7
 #define R128_DATATYPE_Y8		8
 #define R128_DATATYPE_RGB8		9
 #define R128_DATATYPE_CI16		10
 #define R128_DATATYPE_YVYU422		11
 #define R128_DATATYPE_VYUY422		12
 #define R128_DATATYPE_AYUV444		14
 #define R128_DATATYPE_ARGB4444		15

 /* Constants */
 #define R128_AGP_OFFSET			0x02000000

 #define R128_WATERMARK_L		16
 #define R128_WATERMARK_M		8
 #define R128_WATERMARK_N		8
 #define R128_WATERMARK_K		128

 #define R128_MAX_USEC_TIMEOUT		100000	/* 100 ms */

 #define R128_LAST_FRAME_REG		R128_GUI_SCRATCH_REG0
 #define R128_LAST_DISPATCH_REG		R128_GUI_SCRATCH_REG1
 #define R128_MAX_VB_AGE			0x7fffffff
 #define R128_MAX_VB_VERTS		(0xffff)

 #define R128_RING_HIGH_MARK		128

 #define R128_PERFORMANCE_BOXES		0

 #define R128_PCIGART_TABLE_SIZE         32768

 #define R128_READ(reg)		readl(((void __iomem *)dev_priv->mmio->handle) + (reg))
 #define R128_WRITE(reg, val)	writel(val, ((void __iomem *)dev_priv->mmio->handle) + (reg))
 #define R128_READ8(reg)		readb(((void __iomem *)dev_priv->mmio->handle) + (reg))
 #define R128_WRITE8(reg, val)	writeb(val, ((void __iomem *)dev_priv->mmio->handle) + (reg))

 #define R128_WRITE_PLL(addr, val)					\
 do {									\
 	R128_WRITE8(R128_CLOCK_CNTL_INDEX,				\
 		    ((addr) & 0x1f) | R128_PLL_WR_EN);			\
 	R128_WRITE(R128_CLOCK_CNTL_DATA, (val));			\
 } while (0)

 #define CCE_PACKET0(reg, n)		(R128_CCE_PACKET0 |		\
 					 ((n) << 16) | ((reg) >> 2))
 #define CCE_PACKET1(reg0, reg1)		(R128_CCE_PACKET1 |		\
 					 (((reg1) >> 2) << 11) | ((reg0) >> 2))
 #define CCE_PACKET2()			(R128_CCE_PACKET2)
 #define CCE_PACKET3(pkt, n)		(R128_CCE_PACKET3 |		\
 					 (pkt) | ((n) << 16))

 static __inline__ void r128_update_ring_snapshot(drm_r128_private_t *dev_priv)
 {
 	drm_r128_ring_buffer_t *ring = &dev_priv->ring;
 	ring->space = (GET_RING_HEAD(dev_priv) - ring->tail) * sizeof(u32);
 	if (ring->space <= 0)
 		ring->space += ring->size;
 }

 /* ================================================================
  * Misc helper macros
  */

 #define DEV_INIT_TEST_WITH_RETURN(_dev_priv)				\
 do {									\
 	if (!_dev_priv) {						\
 		DRM_ERROR("called with no initialization\n");		\
 		return -EINVAL;						\
 	}								\
 } while (0)

 #define RING_SPACE_TEST_WITH_RETURN(dev_priv)				\
 do {									\
 	drm_r128_ring_buffer_t *ring = &dev_priv->ring; int i;		\
 	if (ring->space < ring->high_mark) {				\
 		for (i = 0 ; i < dev_priv->usec_timeout ; i++) {	\
 			r128_update_ring_snapshot(dev_priv);		\
 			if (ring->space >= ring->high_mark)		\
 				goto __ring_space_done;			\
 			udelay(1);					\
 		}							\
 		DRM_ERROR("ring space check failed!\n");		\
 		return -EBUSY;						\
 	}								\
  __ring_space_done:							\
 	;								\
 } while (0)

 #define VB_AGE_TEST_WITH_RETURN(dev_priv)				\
 do {									\
 	drm_r128_sarea_t *sarea_priv = dev_priv->sarea_priv;		\
 	if (sarea_priv->last_dispatch >= R128_MAX_VB_AGE) {		\
 		int __ret = r128_do_cce_idle(dev_priv);			\
 		if (__ret)						\
 			return __ret;					\
 		sarea_priv->last_dispatch = 0;				\
 		r128_freelist_reset(dev);				\
 	}								\
 } while (0)

 #define R128_WAIT_UNTIL_PAGE_FLIPPED() do {				\
 	OUT_RING(CCE_PACKET0(R128_WAIT_UNTIL, 0));			\
 	OUT_RING(R128_EVENT_CRTC_OFFSET);				\
 } while (0)

 /* ================================================================
  * Ring control
  */

 #define R128_VERBOSE	0

 #define RING_LOCALS							\
 	int write, _nr; unsigned int tail_mask; volatile u32 *ring;

 #define BEGIN_RING(n) do {						\
 	if (R128_VERBOSE)						\
 		DRM_INFO("BEGIN_RING(%d)\n", (n));			\
 	if (dev_priv->ring.space <= (n) * sizeof(u32)) {		\
 		COMMIT_RING();						\
 		r128_wait_ring(dev_priv, (n) * sizeof(u32));		\
 	}								\
 	_nr = n; dev_priv->ring.space -= (n) * sizeof(u32);		\
 	ring = dev_priv->ring.start;					\
 	write = dev_priv->ring.tail;					\
 	tail_mask = dev_priv->ring.tail_mask;				\
 } while (0)

 /* You can set this to zero if you want.  If the card locks up, you'll
  * need to keep this set.  It works around a bug in early revs of the
  * Rage 128 chipset, where the CCE would read 32 dwords past the end of
  * the ring buffer before wrapping around.
  */
 #define R128_BROKEN_CCE	1

 #define ADVANCE_RING() do {						\
 	if (R128_VERBOSE)						\
 		DRM_INFO("ADVANCE_RING() wr=0x%06x tail=0x%06x\n",	\
 			 write, dev_priv->ring.tail);			\
 	if (R128_BROKEN_CCE && write < 32)				\
 		memcpy(dev_priv->ring.end,				\
 		       dev_priv->ring.start,				\
 		       write * sizeof(u32));				\
 	if (((dev_priv->ring.tail + _nr) & tail_mask) != write)		\
 		DRM_ERROR(						\
 			"ADVANCE_RING(): mismatch: nr: %x write: %x line: %d\n",	\
 			((dev_priv->ring.tail + _nr) & tail_mask),	\
 			write, __LINE__);				\
 	else								\
 		dev_priv->ring.tail = write;				\
 } while (0)

 #define COMMIT_RING() do {						\
 	if (R128_VERBOSE)						\
 		DRM_INFO("COMMIT_RING() tail=0x%06x\n",			\
 			 dev_priv->ring.tail);				\
 	mb();						\
 	R128_WRITE(R128_PM4_BUFFER_DL_WPTR, dev_priv->ring.tail);	\
 	R128_READ(R128_PM4_BUFFER_DL_WPTR);				\
 } while (0)

 #define OUT_RING(x) do {						\
 	if (R128_VERBOSE)						\
 		DRM_INFO("   OUT_RING( 0x%08x ) at 0x%x\n",		\
 			 (unsigned int)(x), write);			\
 	ring[write++] = cpu_to_le32(x);					\
 	write &= tail_mask;						\
 } while (0)

 #endif				/* __R128_DRV_H__ */
	/* r128_drv.h -- Private header for r128 driver -- linux-c --
	* Created: Mon Dec 13 09:51:11 1999 by faith@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
	* 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:
	* Rickard E. (Rik) Faith <faith@valinux.com>
	* Kevin E. Martin <martin@valinux.com>
	* Gareth Hughes <gareth@valinux.com>
	* Michel Dänzer <daenzerm@student.ethz.ch>
	*/

	#ifndef __R128_DRV_H__
	#define __R128_DRV_H__

	#include <linux/delay.h>
	#include <linux/io.h>
	#include <linux/irqreturn.h>

	#include <drm/drm_ioctl.h>
	#include <drm/drm_legacy.h>
	#include <drm/r128_drm.h>

	#include "ati_pcigart.h"

	/* General customization:
	*/
	#define DRIVER_AUTHOR "Gareth Hughes, VA Linux Systems Inc."

	#define DRIVER_NAME "r128"
	#define DRIVER_DESC "ATI Rage 128"
	#define DRIVER_DATE "20030725"

	/* Interface history:
	*
	* ?? - ??
	* 2.4 - Add support for ycbcr textures (no new ioctls)
	* 2.5 - Add FLIP ioctl, disable FULLSCREEN.
	*/
	#define DRIVER_MAJOR 2
	#define DRIVER_MINOR 5
	#define DRIVER_PATCHLEVEL 0

	#define GET_RING_HEAD(dev_priv) R128_READ(R128_PM4_BUFFER_DL_RPTR)

	typedef struct drm_r128_freelist {
	unsigned int age;
	struct drm_buf *buf;
	struct drm_r128_freelist *next;
	struct drm_r128_freelist *prev;
	} drm_r128_freelist_t;

	typedef struct drm_r128_ring_buffer {
	u32 *start;
	u32 *end;
	int size;
	int size_l2qw;

	u32 tail;
	u32 tail_mask;
	int space;

	int high_mark;
	} drm_r128_ring_buffer_t;

	typedef struct drm_r128_private {
	drm_r128_ring_buffer_t ring;
	drm_r128_sarea_t *sarea_priv;

	int cce_mode;
	int cce_fifo_size;
	int cce_running;

	drm_r128_freelist_t *head;
	drm_r128_freelist_t *tail;

	int usec_timeout;
	int is_pci;
	unsigned long cce_buffers_offset;

	atomic_t idle_count;

	int page_flipping;
	int current_page;
	u32 crtc_offset;
	u32 crtc_offset_cntl;

	atomic_t vbl_received;

	u32 color_fmt;
	unsigned int front_offset;
	unsigned int front_pitch;
	unsigned int back_offset;
	unsigned int back_pitch;

	u32 depth_fmt;
	unsigned int depth_offset;
	unsigned int depth_pitch;
	unsigned int span_offset;

	u32 front_pitch_offset_c;
	u32 back_pitch_offset_c;
	u32 depth_pitch_offset_c;
	u32 span_pitch_offset_c;

	drm_local_map_t *sarea;
	drm_local_map_t *mmio;
	drm_local_map_t *cce_ring;
	drm_local_map_t *ring_rptr;
	drm_local_map_t *agp_textures;
	struct drm_ati_pcigart_info gart_info;
	} drm_r128_private_t;

	typedef struct drm_r128_buf_priv {
	u32 age;
	int prim;
	int discard;
	int dispatched;
	drm_r128_freelist_t *list_entry;
	} drm_r128_buf_priv_t;

	extern const struct drm_ioctl_desc r128_ioctls[];
	extern int r128_max_ioctl;

	/* r128_cce.c */
	extern int r128_cce_init(struct drm_device dev, void data, struct drm_file *file_priv);
	extern int r128_cce_start(struct drm_device dev, void data, struct drm_file *file_priv);
	extern int r128_cce_stop(struct drm_device dev, void data, struct drm_file *file_priv);
	extern int r128_cce_reset(struct drm_device dev, void data, struct drm_file *file_priv);
	extern int r128_cce_idle(struct drm_device dev, void data, struct drm_file *file_priv);
	extern int r128_engine_reset(struct drm_device dev, void data, struct drm_file *file_priv);
	extern int r128_fullscreen(struct drm_device dev, void data, struct drm_file *file_priv);
	extern int r128_cce_buffers(struct drm_device dev, void data, struct drm_file *file_priv);

	extern int r128_cce_stipple(struct drm_device dev, void data, struct drm_file *file_priv);
	extern int r128_cce_depth(struct drm_device dev, void data, struct drm_file *file_priv);
	extern int r128_getparam(struct drm_device dev, void data, struct drm_file *file_priv);

	extern void r128_freelist_reset(struct drm_device *dev);

	extern int r128_wait_ring(drm_r128_private_t *dev_priv, int n);

	extern int r128_do_cce_idle(drm_r128_private_t *dev_priv);
	extern int r128_do_cleanup_cce(struct drm_device *dev);

	extern int r128_enable_vblank(struct drm_device *dev, unsigned int pipe);
	extern void r128_disable_vblank(struct drm_device *dev, unsigned int pipe);
	extern u32 r128_get_vblank_counter(struct drm_device *dev, unsigned int pipe);
	extern irqreturn_t r128_driver_irq_handler(int irq, void *arg);
	extern void r128_driver_irq_preinstall(struct drm_device *dev);
	extern int r128_driver_irq_postinstall(struct drm_device *dev);
	extern void r128_driver_irq_uninstall(struct drm_device *dev);
	extern void r128_driver_lastclose(struct drm_device *dev);
	extern int r128_driver_load(struct drm_device *dev, unsigned long flags);
	extern void r128_driver_preclose(struct drm_device *dev,
	struct drm_file *file_priv);

	extern long r128_compat_ioctl(struct file *filp, unsigned int cmd,
	unsigned long arg);

	/* Register definitions, register access macros and drmAddMap constants
	* for Rage 128 kernel driver.
	*/

	#define R128_AUX_SC_CNTL 0x1660
	# define R128_AUX1_SC_EN (1 << 0)
	# define R128_AUX1_SC_MODE_OR (0 << 1)
	# define R128_AUX1_SC_MODE_NAND (1 << 1)
	# define R128_AUX2_SC_EN (1 << 2)
	# define R128_AUX2_SC_MODE_OR (0 << 3)
	# define R128_AUX2_SC_MODE_NAND (1 << 3)
	# define R128_AUX3_SC_EN (1 << 4)
	# define R128_AUX3_SC_MODE_OR (0 << 5)
	# define R128_AUX3_SC_MODE_NAND (1 << 5)
	#define R128_AUX1_SC_LEFT 0x1664
	#define R128_AUX1_SC_RIGHT 0x1668
	#define R128_AUX1_SC_TOP 0x166c
	#define R128_AUX1_SC_BOTTOM 0x1670
	#define R128_AUX2_SC_LEFT 0x1674
	#define R128_AUX2_SC_RIGHT 0x1678
	#define R128_AUX2_SC_TOP 0x167c
	#define R128_AUX2_SC_BOTTOM 0x1680
	#define R128_AUX3_SC_LEFT 0x1684
	#define R128_AUX3_SC_RIGHT 0x1688
	#define R128_AUX3_SC_TOP 0x168c
	#define R128_AUX3_SC_BOTTOM 0x1690

	#define R128_BRUSH_DATA0 0x1480
	#define R128_BUS_CNTL 0x0030
	# define R128_BUS_MASTER_DIS (1 << 6)

	#define R128_CLOCK_CNTL_INDEX 0x0008
	#define R128_CLOCK_CNTL_DATA 0x000c
	# define R128_PLL_WR_EN (1 << 7)
	#define R128_CONSTANT_COLOR_C 0x1d34
	#define R128_CRTC_OFFSET 0x0224
	#define R128_CRTC_OFFSET_CNTL 0x0228
	# define R128_CRTC_OFFSET_FLIP_CNTL (1 << 16)

	#define R128_DP_GUI_MASTER_CNTL 0x146c
	# define R128_GMC_SRC_PITCH_OFFSET_CNTL (1 << 0)
	# define R128_GMC_DST_PITCH_OFFSET_CNTL (1 << 1)
	# define R128_GMC_BRUSH_SOLID_COLOR (13 << 4)
	# define R128_GMC_BRUSH_NONE (15 << 4)
	# define R128_GMC_DST_16BPP (4 << 8)
	# define R128_GMC_DST_24BPP (5 << 8)
	# define R128_GMC_DST_32BPP (6 << 8)
	# define R128_GMC_DST_DATATYPE_SHIFT 8
	# define R128_GMC_SRC_DATATYPE_COLOR (3 << 12)
	# define R128_DP_SRC_SOURCE_MEMORY (2 << 24)
	# define R128_DP_SRC_SOURCE_HOST_DATA (3 << 24)
	# define R128_GMC_CLR_CMP_CNTL_DIS (1 << 28)
	# define R128_GMC_AUX_CLIP_DIS (1 << 29)
	# define R128_GMC_WR_MSK_DIS (1 << 30)
	# define R128_ROP3_S 0x00cc0000
	# define R128_ROP3_P 0x00f00000
	#define R128_DP_WRITE_MASK 0x16cc
	#define R128_DST_PITCH_OFFSET_C 0x1c80
	# define R128_DST_TILE (1 << 31)

	#define R128_GEN_INT_CNTL 0x0040
	# define R128_CRTC_VBLANK_INT_EN (1 << 0)
	#define R128_GEN_INT_STATUS 0x0044
	# define R128_CRTC_VBLANK_INT (1 << 0)
	# define R128_CRTC_VBLANK_INT_AK (1 << 0)
	#define R128_GEN_RESET_CNTL 0x00f0
	# define R128_SOFT_RESET_GUI (1 << 0)

	#define R128_GUI_SCRATCH_REG0 0x15e0
	#define R128_GUI_SCRATCH_REG1 0x15e4
	#define R128_GUI_SCRATCH_REG2 0x15e8
	#define R128_GUI_SCRATCH_REG3 0x15ec
	#define R128_GUI_SCRATCH_REG4 0x15f0
	#define R128_GUI_SCRATCH_REG5 0x15f4

	#define R128_GUI_STAT 0x1740
	# define R128_GUI_FIFOCNT_MASK 0x0fff
	# define R128_GUI_ACTIVE (1 << 31)

	#define R128_MCLK_CNTL 0x000f
	# define R128_FORCE_GCP (1 << 16)
	# define R128_FORCE_PIPE3D_CP (1 << 17)
	# define R128_FORCE_RCP (1 << 18)

	#define R128_PC_GUI_CTLSTAT 0x1748
	#define R128_PC_NGUI_CTLSTAT 0x0184
	# define R128_PC_FLUSH_GUI (3 << 0)
	# define R128_PC_RI_GUI (1 << 2)
	# define R128_PC_FLUSH_ALL 0x00ff
	# define R128_PC_BUSY (1 << 31)

	#define R128_PCI_GART_PAGE 0x017c
	#define R128_PRIM_TEX_CNTL_C 0x1cb0

	#define R128_SCALE_3D_CNTL 0x1a00
	#define R128_SEC_TEX_CNTL_C 0x1d00
	#define R128_SEC_TEXTURE_BORDER_COLOR_C 0x1d3c
	#define R128_SETUP_CNTL 0x1bc4
	#define R128_STEN_REF_MASK_C 0x1d40

	#define R128_TEX_CNTL_C 0x1c9c
	# define R128_TEX_CACHE_FLUSH (1 << 23)

	#define R128_WAIT_UNTIL 0x1720
	# define R128_EVENT_CRTC_OFFSET (1 << 0)
	#define R128_WINDOW_XY_OFFSET 0x1bcc

	/* CCE registers
	*/
	#define R128_PM4_BUFFER_OFFSET 0x0700
	#define R128_PM4_BUFFER_CNTL 0x0704
	# define R128_PM4_MASK (15 << 28)
	# define R128_PM4_NONPM4 (0 << 28)
	# define R128_PM4_192PIO (1 << 28)
	# define R128_PM4_192BM (2 << 28)
	# define R128_PM4_128PIO_64INDBM (3 << 28)
	# define R128_PM4_128BM_64INDBM (4 << 28)
	# define R128_PM4_64PIO_128INDBM (5 << 28)
	# define R128_PM4_64BM_128INDBM (6 << 28)
	# define R128_PM4_64PIO_64VCBM_64INDBM (7 << 28)
	# define R128_PM4_64BM_64VCBM_64INDBM (8 << 28)
	# define R128_PM4_64PIO_64VCPIO_64INDPIO (15 << 28)
	# define R128_PM4_BUFFER_CNTL_NOUPDATE (1 << 27)

	#define R128_PM4_BUFFER_WM_CNTL 0x0708
	# define R128_WMA_SHIFT 0
	# define R128_WMB_SHIFT 8
	# define R128_WMC_SHIFT 16
	# define R128_WB_WM_SHIFT 24

	#define R128_PM4_BUFFER_DL_RPTR_ADDR 0x070c
	#define R128_PM4_BUFFER_DL_RPTR 0x0710
	#define R128_PM4_BUFFER_DL_WPTR 0x0714
	# define R128_PM4_BUFFER_DL_DONE (1 << 31)

	#define R128_PM4_VC_FPU_SETUP 0x071c

	#define R128_PM4_IW_INDOFF 0x0738
	#define R128_PM4_IW_INDSIZE 0x073c

	#define R128_PM4_STAT 0x07b8
	# define R128_PM4_FIFOCNT_MASK 0x0fff
	# define R128_PM4_BUSY (1 << 16)
	# define R128_PM4_GUI_ACTIVE (1 << 31)

	#define R128_PM4_MICROCODE_ADDR 0x07d4
	#define R128_PM4_MICROCODE_RADDR 0x07d8
	#define R128_PM4_MICROCODE_DATAH 0x07dc
	#define R128_PM4_MICROCODE_DATAL 0x07e0

	#define R128_PM4_BUFFER_ADDR 0x07f0
	#define R128_PM4_MICRO_CNTL 0x07fc
	# define R128_PM4_MICRO_FREERUN (1 << 30)

	#define R128_PM4_FIFO_DATA_EVEN 0x1000
	#define R128_PM4_FIFO_DATA_ODD 0x1004

	/* CCE command packets
	*/
	#define R128_CCE_PACKET0 0x00000000
	#define R128_CCE_PACKET1 0x40000000
	#define R128_CCE_PACKET2 0x80000000
	#define R128_CCE_PACKET3 0xC0000000
	# define R128_CNTL_HOSTDATA_BLT 0x00009400
	# define R128_CNTL_PAINT_MULTI 0x00009A00
	# define R128_CNTL_BITBLT_MULTI 0x00009B00
	# define R128_3D_RNDR_GEN_INDX_PRIM 0x00002300

	#define R128_CCE_PACKET_MASK 0xC0000000
	#define R128_CCE_PACKET_COUNT_MASK 0x3fff0000
	#define R128_CCE_PACKET0_REG_MASK 0x000007ff
	#define R128_CCE_PACKET1_REG0_MASK 0x000007ff
	#define R128_CCE_PACKET1_REG1_MASK 0x003ff800

	#define R128_CCE_VC_CNTL_PRIM_TYPE_NONE 0x00000000
	#define R128_CCE_VC_CNTL_PRIM_TYPE_POINT 0x00000001
	#define R128_CCE_VC_CNTL_PRIM_TYPE_LINE 0x00000002
	#define R128_CCE_VC_CNTL_PRIM_TYPE_POLY_LINE 0x00000003
	#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_LIST 0x00000004
	#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_FAN 0x00000005
	#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_STRIP 0x00000006
	#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_TYPE2 0x00000007
	#define R128_CCE_VC_CNTL_PRIM_WALK_IND 0x00000010
	#define R128_CCE_VC_CNTL_PRIM_WALK_LIST 0x00000020
	#define R128_CCE_VC_CNTL_PRIM_WALK_RING 0x00000030
	#define R128_CCE_VC_CNTL_NUM_SHIFT 16

	#define R128_DATATYPE_VQ 0
	#define R128_DATATYPE_CI4 1
	#define R128_DATATYPE_CI8 2
	#define R128_DATATYPE_ARGB1555 3
	#define R128_DATATYPE_RGB565 4
	#define R128_DATATYPE_RGB888 5
	#define R128_DATATYPE_ARGB8888 6
	#define R128_DATATYPE_RGB332 7
	#define R128_DATATYPE_Y8 8
	#define R128_DATATYPE_RGB8 9
	#define R128_DATATYPE_CI16 10
	#define R128_DATATYPE_YVYU422 11
	#define R128_DATATYPE_VYUY422 12
	#define R128_DATATYPE_AYUV444 14
	#define R128_DATATYPE_ARGB4444 15

	/* Constants */
	#define R128_AGP_OFFSET 0x02000000

	#define R128_WATERMARK_L 16
	#define R128_WATERMARK_M 8
	#define R128_WATERMARK_N 8
	#define R128_WATERMARK_K 128

	#define R128_MAX_USEC_TIMEOUT 100000 /* 100 ms */

	#define R128_LAST_FRAME_REG R128_GUI_SCRATCH_REG0
	#define R128_LAST_DISPATCH_REG R128_GUI_SCRATCH_REG1
	#define R128_MAX_VB_AGE 0x7fffffff
	#define R128_MAX_VB_VERTS (0xffff)

	#define R128_RING_HIGH_MARK 128

	#define R128_PERFORMANCE_BOXES 0

	#define R128_PCIGART_TABLE_SIZE 32768

	#define R128_READ(reg) readl(((void __iomem *)dev_priv->mmio->handle) + (reg))
	#define R128_WRITE(reg, val) writel(val, ((void __iomem *)dev_priv->mmio->handle) + (reg))
	#define R128_READ8(reg) readb(((void __iomem *)dev_priv->mmio->handle) + (reg))
	#define R128_WRITE8(reg, val) writeb(val, ((void __iomem *)dev_priv->mmio->handle) + (reg))

	#define R128_WRITE_PLL(addr, val) \
	do { \
	R128_WRITE8(R128_CLOCK_CNTL_INDEX, \
	((addr) & 0x1f) \| R128_PLL_WR_EN); \
	R128_WRITE(R128_CLOCK_CNTL_DATA, (val)); \
	} while (0)

	#define CCE_PACKET0(reg, n) (R128_CCE_PACKET0 \| \
	((n) << 16) \| ((reg) >> 2))
	#define CCE_PACKET1(reg0, reg1) (R128_CCE_PACKET1 \| \
	(((reg1) >> 2) << 11) \| ((reg0) >> 2))
	#define CCE_PACKET2() (R128_CCE_PACKET2)
	#define CCE_PACKET3(pkt, n) (R128_CCE_PACKET3 \| \
	(pkt) \| ((n) << 16))

	static __inline__ void r128_update_ring_snapshot(drm_r128_private_t *dev_priv)
	{
	drm_r128_ring_buffer_t *ring = &dev_priv->ring;
	ring->space = (GET_RING_HEAD(dev_priv) - ring->tail) * sizeof(u32);
	if (ring->space <= 0)
	ring->space += ring->size;
	}

	/* ================================================================
	* Misc helper macros
	*/

	#define DEV_INIT_TEST_WITH_RETURN(_dev_priv) \
	do { \
	if (!_dev_priv) { \
	DRM_ERROR("called with no initialization\n"); \
	return -EINVAL; \
	} \
	} while (0)

	#define RING_SPACE_TEST_WITH_RETURN(dev_priv) \
	do { \
	drm_r128_ring_buffer_t *ring = &dev_priv->ring; int i; \
	if (ring->space < ring->high_mark) { \
	for (i = 0 ; i < dev_priv->usec_timeout ; i++) { \
	r128_update_ring_snapshot(dev_priv); \
	if (ring->space >= ring->high_mark) \
	goto __ring_space_done; \
	udelay(1); \
	} \
	DRM_ERROR("ring space check failed!\n"); \
	return -EBUSY; \
	} \
	__ring_space_done: \
	; \
	} while (0)

	#define VB_AGE_TEST_WITH_RETURN(dev_priv) \
	do { \
	drm_r128_sarea_t *sarea_priv = dev_priv->sarea_priv; \
	if (sarea_priv->last_dispatch >= R128_MAX_VB_AGE) { \
	int __ret = r128_do_cce_idle(dev_priv); \
	if (__ret) \
	return __ret; \
	sarea_priv->last_dispatch = 0; \
	r128_freelist_reset(dev); \
	} \
	} while (0)

	#define R128_WAIT_UNTIL_PAGE_FLIPPED() do { \
	OUT_RING(CCE_PACKET0(R128_WAIT_UNTIL, 0)); \
	OUT_RING(R128_EVENT_CRTC_OFFSET); \
	} while (0)

	/* ================================================================
	* Ring control
	*/

	#define R128_VERBOSE 0

	#define RING_LOCALS \
	int write, _nr; unsigned int tail_mask; volatile u32 *ring;

	#define BEGIN_RING(n) do { \
	if (R128_VERBOSE) \
	DRM_INFO("BEGIN_RING(%d)\n", (n)); \
	if (dev_priv->ring.space <= (n) * sizeof(u32)) { \
	COMMIT_RING(); \
	r128_wait_ring(dev_priv, (n) * sizeof(u32)); \
	} \
	_nr = n; dev_priv->ring.space -= (n) * sizeof(u32); \
	ring = dev_priv->ring.start; \
	write = dev_priv->ring.tail; \
	tail_mask = dev_priv->ring.tail_mask; \
	} while (0)

	/* You can set this to zero if you want. If the card locks up, you'll
	* need to keep this set. It works around a bug in early revs of the
	* Rage 128 chipset, where the CCE would read 32 dwords past the end of
	* the ring buffer before wrapping around.
	*/
	#define R128_BROKEN_CCE 1

	#define ADVANCE_RING() do { \
	if (R128_VERBOSE) \
	DRM_INFO("ADVANCE_RING() wr=0x%06x tail=0x%06x\n", \
	write, dev_priv->ring.tail); \
	if (R128_BROKEN_CCE && write < 32) \
	memcpy(dev_priv->ring.end, \
	dev_priv->ring.start, \
	write * sizeof(u32)); \
	if (((dev_priv->ring.tail + _nr) & tail_mask) != write) \
	DRM_ERROR( \
	"ADVANCE_RING(): mismatch: nr: %x write: %x line: %d\n", \
	((dev_priv->ring.tail + _nr) & tail_mask), \
	write, __LINE__); \
	else \
	dev_priv->ring.tail = write; \
	} while (0)

	#define COMMIT_RING() do { \
	if (R128_VERBOSE) \
	DRM_INFO("COMMIT_RING() tail=0x%06x\n", \
	dev_priv->ring.tail); \
	mb(); \
	R128_WRITE(R128_PM4_BUFFER_DL_WPTR, dev_priv->ring.tail); \
	R128_READ(R128_PM4_BUFFER_DL_WPTR); \
	} while (0)

	#define OUT_RING(x) do { \
	if (R128_VERBOSE) \
	DRM_INFO(" OUT_RING( 0x%08x ) at 0x%x\n", \
	(unsigned int)(x), write); \
	ring[write++] = cpu_to_le32(x); \
	write &= tail_mask; \
	} while (0)

	#endif /* __R128_DRV_H__ */