linux/drivers/gpu/drm/r128/r128_drv.h
<<
>>
Prefs
   1/* r128_drv.h -- Private header for r128 driver -*- linux-c -*-
   2 * Created: Mon Dec 13 09:51:11 1999 by faith@precisioninsight.com
   3 */
   4/*
   5 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
   6 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   7 * All rights reserved.
   8 *
   9 * Permission is hereby granted, free of charge, to any person obtaining a
  10 * copy of this software and associated documentation files (the "Software"),
  11 * to deal in the Software without restriction, including without limitation
  12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13 * and/or sell copies of the Software, and to permit persons to whom the
  14 * Software is furnished to do so, subject to the following conditions:
  15 *
  16 * The above copyright notice and this permission notice (including the next
  17 * paragraph) shall be included in all copies or substantial portions of the
  18 * Software.
  19 *
  20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  26 * DEALINGS IN THE SOFTWARE.
  27 *
  28 * Authors:
  29 *    Rickard E. (Rik) Faith <faith@valinux.com>
  30 *    Kevin E. Martin <martin@valinux.com>
  31 *    Gareth Hughes <gareth@valinux.com>
  32 *    Michel D�zer <daenzerm@student.ethz.ch>
  33 */
  34
  35#ifndef __R128_DRV_H__
  36#define __R128_DRV_H__
  37
  38#include <drm/ati_pcigart.h>
  39#include <drm/drm_legacy.h>
  40
  41/* General customization:
  42 */
  43#define DRIVER_AUTHOR           "Gareth Hughes, VA Linux Systems Inc."
  44
  45#define DRIVER_NAME             "r128"
  46#define DRIVER_DESC             "ATI Rage 128"
  47#define DRIVER_DATE             "20030725"
  48
  49/* Interface history:
  50 *
  51 * ??  - ??
  52 * 2.4 - Add support for ycbcr textures (no new ioctls)
  53 * 2.5 - Add FLIP ioctl, disable FULLSCREEN.
  54 */
  55#define DRIVER_MAJOR            2
  56#define DRIVER_MINOR            5
  57#define DRIVER_PATCHLEVEL       0
  58
  59#define GET_RING_HEAD(dev_priv)         R128_READ(R128_PM4_BUFFER_DL_RPTR)
  60
  61typedef struct drm_r128_freelist {
  62        unsigned int age;
  63        struct drm_buf *buf;
  64        struct drm_r128_freelist *next;
  65        struct drm_r128_freelist *prev;
  66} drm_r128_freelist_t;
  67
  68typedef struct drm_r128_ring_buffer {
  69        u32 *start;
  70        u32 *end;
  71        int size;
  72        int size_l2qw;
  73
  74        u32 tail;
  75        u32 tail_mask;
  76        int space;
  77
  78        int high_mark;
  79} drm_r128_ring_buffer_t;
  80
  81typedef struct drm_r128_private {
  82        drm_r128_ring_buffer_t ring;
  83        drm_r128_sarea_t *sarea_priv;
  84
  85        int cce_mode;
  86        int cce_fifo_size;
  87        int cce_running;
  88
  89        drm_r128_freelist_t *head;
  90        drm_r128_freelist_t *tail;
  91
  92        int usec_timeout;
  93        int is_pci;
  94        unsigned long cce_buffers_offset;
  95
  96        atomic_t idle_count;
  97
  98        int page_flipping;
  99        int current_page;
 100        u32 crtc_offset;
 101        u32 crtc_offset_cntl;
 102
 103        atomic_t vbl_received;
 104
 105        u32 color_fmt;
 106        unsigned int front_offset;
 107        unsigned int front_pitch;
 108        unsigned int back_offset;
 109        unsigned int back_pitch;
 110
 111        u32 depth_fmt;
 112        unsigned int depth_offset;
 113        unsigned int depth_pitch;
 114        unsigned int span_offset;
 115
 116        u32 front_pitch_offset_c;
 117        u32 back_pitch_offset_c;
 118        u32 depth_pitch_offset_c;
 119        u32 span_pitch_offset_c;
 120
 121        drm_local_map_t *sarea;
 122        drm_local_map_t *mmio;
 123        drm_local_map_t *cce_ring;
 124        drm_local_map_t *ring_rptr;
 125        drm_local_map_t *agp_textures;
 126        struct drm_ati_pcigart_info gart_info;
 127} drm_r128_private_t;
 128
 129typedef struct drm_r128_buf_priv {
 130        u32 age;
 131        int prim;
 132        int discard;
 133        int dispatched;
 134        drm_r128_freelist_t *list_entry;
 135} drm_r128_buf_priv_t;
 136
 137extern const struct drm_ioctl_desc r128_ioctls[];
 138extern int r128_max_ioctl;
 139
 140                                /* r128_cce.c */
 141extern int r128_cce_init(struct drm_device *dev, void *data, struct drm_file *file_priv);
 142extern int r128_cce_start(struct drm_device *dev, void *data, struct drm_file *file_priv);
 143extern int r128_cce_stop(struct drm_device *dev, void *data, struct drm_file *file_priv);
 144extern int r128_cce_reset(struct drm_device *dev, void *data, struct drm_file *file_priv);
 145extern int r128_cce_idle(struct drm_device *dev, void *data, struct drm_file *file_priv);
 146extern int r128_engine_reset(struct drm_device *dev, void *data, struct drm_file *file_priv);
 147extern int r128_fullscreen(struct drm_device *dev, void *data, struct drm_file *file_priv);
 148extern int r128_cce_buffers(struct drm_device *dev, void *data, struct drm_file *file_priv);
 149
 150extern void r128_freelist_reset(struct drm_device *dev);
 151
 152extern int r128_wait_ring(drm_r128_private_t *dev_priv, int n);
 153
 154extern int r128_do_cce_idle(drm_r128_private_t *dev_priv);
 155extern int r128_do_cleanup_cce(struct drm_device *dev);
 156
 157extern int r128_enable_vblank(struct drm_device *dev, unsigned int pipe);
 158extern void r128_disable_vblank(struct drm_device *dev, unsigned int pipe);
 159extern u32 r128_get_vblank_counter(struct drm_device *dev, unsigned int pipe);
 160extern irqreturn_t r128_driver_irq_handler(int irq, void *arg);
 161extern void r128_driver_irq_preinstall(struct drm_device *dev);
 162extern int r128_driver_irq_postinstall(struct drm_device *dev);
 163extern void r128_driver_irq_uninstall(struct drm_device *dev);
 164extern void r128_driver_lastclose(struct drm_device *dev);
 165extern int r128_driver_load(struct drm_device *dev, unsigned long flags);
 166extern void r128_driver_preclose(struct drm_device *dev,
 167                                 struct drm_file *file_priv);
 168
 169extern long r128_compat_ioctl(struct file *filp, unsigned int cmd,
 170                              unsigned long arg);
 171
 172/* Register definitions, register access macros and drmAddMap constants
 173 * for Rage 128 kernel driver.
 174 */
 175
 176#define R128_AUX_SC_CNTL                0x1660
 177#       define R128_AUX1_SC_EN                  (1 << 0)
 178#       define R128_AUX1_SC_MODE_OR             (0 << 1)
 179#       define R128_AUX1_SC_MODE_NAND           (1 << 1)
 180#       define R128_AUX2_SC_EN                  (1 << 2)
 181#       define R128_AUX2_SC_MODE_OR             (0 << 3)
 182#       define R128_AUX2_SC_MODE_NAND           (1 << 3)
 183#       define R128_AUX3_SC_EN                  (1 << 4)
 184#       define R128_AUX3_SC_MODE_OR             (0 << 5)
 185#       define R128_AUX3_SC_MODE_NAND           (1 << 5)
 186#define R128_AUX1_SC_LEFT               0x1664
 187#define R128_AUX1_SC_RIGHT              0x1668
 188#define R128_AUX1_SC_TOP                0x166c
 189#define R128_AUX1_SC_BOTTOM             0x1670
 190#define R128_AUX2_SC_LEFT               0x1674
 191#define R128_AUX2_SC_RIGHT              0x1678
 192#define R128_AUX2_SC_TOP                0x167c
 193#define R128_AUX2_SC_BOTTOM             0x1680
 194#define R128_AUX3_SC_LEFT               0x1684
 195#define R128_AUX3_SC_RIGHT              0x1688
 196#define R128_AUX3_SC_TOP                0x168c
 197#define R128_AUX3_SC_BOTTOM             0x1690
 198
 199#define R128_BRUSH_DATA0                0x1480
 200#define R128_BUS_CNTL                   0x0030
 201#       define R128_BUS_MASTER_DIS              (1 << 6)
 202
 203#define R128_CLOCK_CNTL_INDEX           0x0008
 204#define R128_CLOCK_CNTL_DATA            0x000c
 205#       define R128_PLL_WR_EN                   (1 << 7)
 206#define R128_CONSTANT_COLOR_C           0x1d34
 207#define R128_CRTC_OFFSET                0x0224
 208#define R128_CRTC_OFFSET_CNTL           0x0228
 209#       define R128_CRTC_OFFSET_FLIP_CNTL       (1 << 16)
 210
 211#define R128_DP_GUI_MASTER_CNTL         0x146c
 212#       define R128_GMC_SRC_PITCH_OFFSET_CNTL   (1    <<  0)
 213#       define R128_GMC_DST_PITCH_OFFSET_CNTL   (1    <<  1)
 214#       define R128_GMC_BRUSH_SOLID_COLOR       (13   <<  4)
 215#       define R128_GMC_BRUSH_NONE              (15   <<  4)
 216#       define R128_GMC_DST_16BPP               (4    <<  8)
 217#       define R128_GMC_DST_24BPP               (5    <<  8)
 218#       define R128_GMC_DST_32BPP               (6    <<  8)
 219#       define R128_GMC_DST_DATATYPE_SHIFT      8
 220#       define R128_GMC_SRC_DATATYPE_COLOR      (3    << 12)
 221#       define R128_DP_SRC_SOURCE_MEMORY        (2    << 24)
 222#       define R128_DP_SRC_SOURCE_HOST_DATA     (3    << 24)
 223#       define R128_GMC_CLR_CMP_CNTL_DIS        (1    << 28)
 224#       define R128_GMC_AUX_CLIP_DIS            (1    << 29)
 225#       define R128_GMC_WR_MSK_DIS              (1    << 30)
 226#       define R128_ROP3_S                      0x00cc0000
 227#       define R128_ROP3_P                      0x00f00000
 228#define R128_DP_WRITE_MASK              0x16cc
 229#define R128_DST_PITCH_OFFSET_C         0x1c80
 230#       define R128_DST_TILE                    (1 << 31)
 231
 232#define R128_GEN_INT_CNTL               0x0040
 233#       define R128_CRTC_VBLANK_INT_EN          (1 <<  0)
 234#define R128_GEN_INT_STATUS             0x0044
 235#       define R128_CRTC_VBLANK_INT             (1 <<  0)
 236#       define R128_CRTC_VBLANK_INT_AK          (1 <<  0)
 237#define R128_GEN_RESET_CNTL             0x00f0
 238#       define R128_SOFT_RESET_GUI              (1 <<  0)
 239
 240#define R128_GUI_SCRATCH_REG0           0x15e0
 241#define R128_GUI_SCRATCH_REG1           0x15e4
 242#define R128_GUI_SCRATCH_REG2           0x15e8
 243#define R128_GUI_SCRATCH_REG3           0x15ec
 244#define R128_GUI_SCRATCH_REG4           0x15f0
 245#define R128_GUI_SCRATCH_REG5           0x15f4
 246
 247#define R128_GUI_STAT                   0x1740
 248#       define R128_GUI_FIFOCNT_MASK            0x0fff
 249#       define R128_GUI_ACTIVE                  (1 << 31)
 250
 251#define R128_MCLK_CNTL                  0x000f
 252#       define R128_FORCE_GCP                   (1 << 16)
 253#       define R128_FORCE_PIPE3D_CP             (1 << 17)
 254#       define R128_FORCE_RCP                   (1 << 18)
 255
 256#define R128_PC_GUI_CTLSTAT             0x1748
 257#define R128_PC_NGUI_CTLSTAT            0x0184
 258#       define R128_PC_FLUSH_GUI                (3 << 0)
 259#       define R128_PC_RI_GUI                   (1 << 2)
 260#       define R128_PC_FLUSH_ALL                0x00ff
 261#       define R128_PC_BUSY                     (1 << 31)
 262
 263#define R128_PCI_GART_PAGE              0x017c
 264#define R128_PRIM_TEX_CNTL_C            0x1cb0
 265
 266#define R128_SCALE_3D_CNTL              0x1a00
 267#define R128_SEC_TEX_CNTL_C             0x1d00
 268#define R128_SEC_TEXTURE_BORDER_COLOR_C 0x1d3c
 269#define R128_SETUP_CNTL                 0x1bc4
 270#define R128_STEN_REF_MASK_C            0x1d40
 271
 272#define R128_TEX_CNTL_C                 0x1c9c
 273#       define R128_TEX_CACHE_FLUSH             (1 << 23)
 274
 275#define R128_WAIT_UNTIL                 0x1720
 276#       define R128_EVENT_CRTC_OFFSET           (1 << 0)
 277#define R128_WINDOW_XY_OFFSET           0x1bcc
 278
 279/* CCE registers
 280 */
 281#define R128_PM4_BUFFER_OFFSET          0x0700
 282#define R128_PM4_BUFFER_CNTL            0x0704
 283#       define R128_PM4_MASK                    (15 << 28)
 284#       define R128_PM4_NONPM4                  (0  << 28)
 285#       define R128_PM4_192PIO                  (1  << 28)
 286#       define R128_PM4_192BM                   (2  << 28)
 287#       define R128_PM4_128PIO_64INDBM          (3  << 28)
 288#       define R128_PM4_128BM_64INDBM           (4  << 28)
 289#       define R128_PM4_64PIO_128INDBM          (5  << 28)
 290#       define R128_PM4_64BM_128INDBM           (6  << 28)
 291#       define R128_PM4_64PIO_64VCBM_64INDBM    (7  << 28)
 292#       define R128_PM4_64BM_64VCBM_64INDBM     (8  << 28)
 293#       define R128_PM4_64PIO_64VCPIO_64INDPIO  (15 << 28)
 294#       define R128_PM4_BUFFER_CNTL_NOUPDATE    (1  << 27)
 295
 296#define R128_PM4_BUFFER_WM_CNTL         0x0708
 297#       define R128_WMA_SHIFT                   0
 298#       define R128_WMB_SHIFT                   8
 299#       define R128_WMC_SHIFT                   16
 300#       define R128_WB_WM_SHIFT                 24
 301
 302#define R128_PM4_BUFFER_DL_RPTR_ADDR    0x070c
 303#define R128_PM4_BUFFER_DL_RPTR         0x0710
 304#define R128_PM4_BUFFER_DL_WPTR         0x0714
 305#       define R128_PM4_BUFFER_DL_DONE          (1 << 31)
 306
 307#define R128_PM4_VC_FPU_SETUP           0x071c
 308
 309#define R128_PM4_IW_INDOFF              0x0738
 310#define R128_PM4_IW_INDSIZE             0x073c
 311
 312#define R128_PM4_STAT                   0x07b8
 313#       define R128_PM4_FIFOCNT_MASK            0x0fff
 314#       define R128_PM4_BUSY                    (1 << 16)
 315#       define R128_PM4_GUI_ACTIVE              (1 << 31)
 316
 317#define R128_PM4_MICROCODE_ADDR         0x07d4
 318#define R128_PM4_MICROCODE_RADDR        0x07d8
 319#define R128_PM4_MICROCODE_DATAH        0x07dc
 320#define R128_PM4_MICROCODE_DATAL        0x07e0
 321
 322#define R128_PM4_BUFFER_ADDR            0x07f0
 323#define R128_PM4_MICRO_CNTL             0x07fc
 324#       define R128_PM4_MICRO_FREERUN           (1 << 30)
 325
 326#define R128_PM4_FIFO_DATA_EVEN         0x1000
 327#define R128_PM4_FIFO_DATA_ODD          0x1004
 328
 329/* CCE command packets
 330 */
 331#define R128_CCE_PACKET0                0x00000000
 332#define R128_CCE_PACKET1                0x40000000
 333#define R128_CCE_PACKET2                0x80000000
 334#define R128_CCE_PACKET3                0xC0000000
 335#       define R128_CNTL_HOSTDATA_BLT           0x00009400
 336#       define R128_CNTL_PAINT_MULTI            0x00009A00
 337#       define R128_CNTL_BITBLT_MULTI           0x00009B00
 338#       define R128_3D_RNDR_GEN_INDX_PRIM       0x00002300
 339
 340#define R128_CCE_PACKET_MASK            0xC0000000
 341#define R128_CCE_PACKET_COUNT_MASK      0x3fff0000
 342#define R128_CCE_PACKET0_REG_MASK       0x000007ff
 343#define R128_CCE_PACKET1_REG0_MASK      0x000007ff
 344#define R128_CCE_PACKET1_REG1_MASK      0x003ff800
 345
 346#define R128_CCE_VC_CNTL_PRIM_TYPE_NONE         0x00000000
 347#define R128_CCE_VC_CNTL_PRIM_TYPE_POINT        0x00000001
 348#define R128_CCE_VC_CNTL_PRIM_TYPE_LINE         0x00000002
 349#define R128_CCE_VC_CNTL_PRIM_TYPE_POLY_LINE    0x00000003
 350#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_LIST     0x00000004
 351#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_FAN      0x00000005
 352#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_STRIP    0x00000006
 353#define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_TYPE2    0x00000007
 354#define R128_CCE_VC_CNTL_PRIM_WALK_IND          0x00000010
 355#define R128_CCE_VC_CNTL_PRIM_WALK_LIST         0x00000020
 356#define R128_CCE_VC_CNTL_PRIM_WALK_RING         0x00000030
 357#define R128_CCE_VC_CNTL_NUM_SHIFT              16
 358
 359#define R128_DATATYPE_VQ                0
 360#define R128_DATATYPE_CI4               1
 361#define R128_DATATYPE_CI8               2
 362#define R128_DATATYPE_ARGB1555          3
 363#define R128_DATATYPE_RGB565            4
 364#define R128_DATATYPE_RGB888            5
 365#define R128_DATATYPE_ARGB8888          6
 366#define R128_DATATYPE_RGB332            7
 367#define R128_DATATYPE_Y8                8
 368#define R128_DATATYPE_RGB8              9
 369#define R128_DATATYPE_CI16              10
 370#define R128_DATATYPE_YVYU422           11
 371#define R128_DATATYPE_VYUY422           12
 372#define R128_DATATYPE_AYUV444           14
 373#define R128_DATATYPE_ARGB4444          15
 374
 375/* Constants */
 376#define R128_AGP_OFFSET                 0x02000000
 377
 378#define R128_WATERMARK_L                16
 379#define R128_WATERMARK_M                8
 380#define R128_WATERMARK_N                8
 381#define R128_WATERMARK_K                128
 382
 383#define R128_MAX_USEC_TIMEOUT           100000  /* 100 ms */
 384
 385#define R128_LAST_FRAME_REG             R128_GUI_SCRATCH_REG0
 386#define R128_LAST_DISPATCH_REG          R128_GUI_SCRATCH_REG1
 387#define R128_MAX_VB_AGE                 0x7fffffff
 388#define R128_MAX_VB_VERTS               (0xffff)
 389
 390#define R128_RING_HIGH_MARK             128
 391
 392#define R128_PERFORMANCE_BOXES          0
 393
 394#define R128_PCIGART_TABLE_SIZE         32768
 395
 396#define R128_READ(reg)          DRM_READ32(dev_priv->mmio, (reg))
 397#define R128_WRITE(reg, val)    DRM_WRITE32(dev_priv->mmio, (reg), (val))
 398#define R128_READ8(reg)         DRM_READ8(dev_priv->mmio, (reg))
 399#define R128_WRITE8(reg, val)   DRM_WRITE8(dev_priv->mmio, (reg), (val))
 400
 401#define R128_WRITE_PLL(addr, val)                                       \
 402do {                                                                    \
 403        R128_WRITE8(R128_CLOCK_CNTL_INDEX,                              \
 404                    ((addr) & 0x1f) | R128_PLL_WR_EN);                  \
 405        R128_WRITE(R128_CLOCK_CNTL_DATA, (val));                        \
 406} while (0)
 407
 408#define CCE_PACKET0(reg, n)             (R128_CCE_PACKET0 |             \
 409                                         ((n) << 16) | ((reg) >> 2))
 410#define CCE_PACKET1(reg0, reg1)         (R128_CCE_PACKET1 |             \
 411                                         (((reg1) >> 2) << 11) | ((reg0) >> 2))
 412#define CCE_PACKET2()                   (R128_CCE_PACKET2)
 413#define CCE_PACKET3(pkt, n)             (R128_CCE_PACKET3 |             \
 414                                         (pkt) | ((n) << 16))
 415
 416static __inline__ void r128_update_ring_snapshot(drm_r128_private_t *dev_priv)
 417{
 418        drm_r128_ring_buffer_t *ring = &dev_priv->ring;
 419        ring->space = (GET_RING_HEAD(dev_priv) - ring->tail) * sizeof(u32);
 420        if (ring->space <= 0)
 421                ring->space += ring->size;
 422}
 423
 424/* ================================================================
 425 * Misc helper macros
 426 */
 427
 428#define DEV_INIT_TEST_WITH_RETURN(_dev_priv)                            \
 429do {                                                                    \
 430        if (!_dev_priv) {                                               \
 431                DRM_ERROR("called with no initialization\n");           \
 432                return -EINVAL;                                         \
 433        }                                                               \
 434} while (0)
 435
 436#define RING_SPACE_TEST_WITH_RETURN(dev_priv)                           \
 437do {                                                                    \
 438        drm_r128_ring_buffer_t *ring = &dev_priv->ring; int i;          \
 439        if (ring->space < ring->high_mark) {                            \
 440                for (i = 0 ; i < dev_priv->usec_timeout ; i++) {        \
 441                        r128_update_ring_snapshot(dev_priv);            \
 442                        if (ring->space >= ring->high_mark)             \
 443                                goto __ring_space_done;                 \
 444                        DRM_UDELAY(1);                                  \
 445                }                                                       \
 446                DRM_ERROR("ring space check failed!\n");                \
 447                return -EBUSY;                                          \
 448        }                                                               \
 449 __ring_space_done:                                                     \
 450        ;                                                               \
 451} while (0)
 452
 453#define VB_AGE_TEST_WITH_RETURN(dev_priv)                               \
 454do {                                                                    \
 455        drm_r128_sarea_t *sarea_priv = dev_priv->sarea_priv;            \
 456        if (sarea_priv->last_dispatch >= R128_MAX_VB_AGE) {             \
 457                int __ret = r128_do_cce_idle(dev_priv);                 \
 458                if (__ret)                                              \
 459                        return __ret;                                   \
 460                sarea_priv->last_dispatch = 0;                          \
 461                r128_freelist_reset(dev);                               \
 462        }                                                               \
 463} while (0)
 464
 465#define R128_WAIT_UNTIL_PAGE_FLIPPED() do {                             \
 466        OUT_RING(CCE_PACKET0(R128_WAIT_UNTIL, 0));                      \
 467        OUT_RING(R128_EVENT_CRTC_OFFSET);                               \
 468} while (0)
 469
 470/* ================================================================
 471 * Ring control
 472 */
 473
 474#define R128_VERBOSE    0
 475
 476#define RING_LOCALS                                                     \
 477        int write, _nr; unsigned int tail_mask; volatile u32 *ring;
 478
 479#define BEGIN_RING(n) do {                                              \
 480        if (R128_VERBOSE)                                               \
 481                DRM_INFO("BEGIN_RING(%d)\n", (n));                      \
 482        if (dev_priv->ring.space <= (n) * sizeof(u32)) {                \
 483                COMMIT_RING();                                          \
 484                r128_wait_ring(dev_priv, (n) * sizeof(u32));            \
 485        }                                                               \
 486        _nr = n; dev_priv->ring.space -= (n) * sizeof(u32);             \
 487        ring = dev_priv->ring.start;                                    \
 488        write = dev_priv->ring.tail;                                    \
 489        tail_mask = dev_priv->ring.tail_mask;                           \
 490} while (0)
 491
 492/* You can set this to zero if you want.  If the card locks up, you'll
 493 * need to keep this set.  It works around a bug in early revs of the
 494 * Rage 128 chipset, where the CCE would read 32 dwords past the end of
 495 * the ring buffer before wrapping around.
 496 */
 497#define R128_BROKEN_CCE 1
 498
 499#define ADVANCE_RING() do {                                             \
 500        if (R128_VERBOSE)                                               \
 501                DRM_INFO("ADVANCE_RING() wr=0x%06x tail=0x%06x\n",      \
 502                         write, dev_priv->ring.tail);                   \
 503        if (R128_BROKEN_CCE && write < 32)                              \
 504                memcpy(dev_priv->ring.end,                              \
 505                       dev_priv->ring.start,                            \
 506                       write * sizeof(u32));                            \
 507        if (((dev_priv->ring.tail + _nr) & tail_mask) != write)         \
 508                DRM_ERROR(                                              \
 509                        "ADVANCE_RING(): mismatch: nr: %x write: %x line: %d\n",        \
 510                        ((dev_priv->ring.tail + _nr) & tail_mask),      \
 511                        write, __LINE__);                               \
 512        else                                                            \
 513                dev_priv->ring.tail = write;                            \
 514} while (0)
 515
 516#define COMMIT_RING() do {                                              \
 517        if (R128_VERBOSE)                                               \
 518                DRM_INFO("COMMIT_RING() tail=0x%06x\n",                 \
 519                         dev_priv->ring.tail);                          \
 520        mb();                                           \
 521        R128_WRITE(R128_PM4_BUFFER_DL_WPTR, dev_priv->ring.tail);       \
 522        R128_READ(R128_PM4_BUFFER_DL_WPTR);                             \
 523} while (0)
 524
 525#define OUT_RING(x) do {                                                \
 526        if (R128_VERBOSE)                                               \
 527                DRM_INFO("   OUT_RING( 0x%08x ) at 0x%x\n",             \
 528                         (unsigned int)(x), write);                     \
 529        ring[write++] = cpu_to_le32(x);                                 \
 530        write &= tail_mask;                                             \
 531} while (0)
 532
 533#endif                          /* __R128_DRV_H__ */
 534