drivers/char/drm/r128_drv.h

   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  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
   5  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   6  * All rights reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25  * DEALINGS IN THE SOFTWARE.
  26  *
  27  * Authors:
  28  *    Rickard E. (Rik) Faith <faith@valinux.com>
  29  *    Kevin E. Martin <martin@valinux.com>
  30  *    Gareth Hughes <gareth@valinux.com>
  31  *    Michel Dänzer <daenzerm@student.ethz.ch>
  32  */
  33
  34 #ifndef __R128_DRV_H__
  35 #define __R128_DRV_H__
  36
  37 #define GET_RING_HEAD(ring)             DRM_READ32(  (volatile u32 *) (ring)->head )
  38 #define SET_RING_HEAD(ring,val)         DRM_WRITE32( (volatile u32 *) (ring)->head, (val) )
  39
  40 typedef struct drm_r128_freelist {
  41         unsigned int age;
  42         drm_buf_t *buf;
  43         struct drm_r128_freelist *next;
  44         struct drm_r128_freelist *prev;
  45 } drm_r128_freelist_t;
  46
  47 typedef struct drm_r128_ring_buffer {
  48         u32 *start;
  49         u32 *end;
  50         int size;
  51         int size_l2qw;
  52
  53         volatile u32 *head;
  54         u32 tail;
  55         u32 tail_mask;
  56         int space;
  57
  58         int high_mark;
  59 } drm_r128_ring_buffer_t;
  60
  61 typedef struct drm_r128_private {
  62         drm_r128_ring_buffer_t ring;
  63         drm_r128_sarea_t *sarea_priv;
  64
  65         int cce_mode;
  66         int cce_fifo_size;
  67         int cce_running;
  68
  69         drm_r128_freelist_t *head;
  70         drm_r128_freelist_t *tail;
  71
  72         int usec_timeout;
  73         int is_pci;
  74         unsigned long phys_pci_gart;
  75         dma_addr_t bus_pci_gart;
  76         unsigned long cce_buffers_offset;
  77
  78         atomic_t idle_count;
  79
  80         int page_flipping;
  81         int current_page;
  82         u32 crtc_offset;
  83         u32 crtc_offset_cntl;
  84
  85         u32 color_fmt;
  86         unsigned int front_offset;
  87         unsigned int front_pitch;
  88         unsigned int back_offset;
  89         unsigned int back_pitch;
  90
  91         u32 depth_fmt;
  92         unsigned int depth_offset;
  93         unsigned int depth_pitch;
  94         unsigned int span_offset;
  95
  96         u32 front_pitch_offset_c;
  97         u32 back_pitch_offset_c;
  98         u32 depth_pitch_offset_c;
  99         u32 span_pitch_offset_c;
 100
 101         drm_map_t *sarea;
 102         drm_map_t *fb;
 103         drm_map_t *mmio;
 104         drm_map_t *cce_ring;
 105         drm_map_t *ring_rptr;
 106         drm_map_t *buffers;
 107         drm_map_t *agp_textures;
 108 } drm_r128_private_t;
 109
 110 typedef struct drm_r128_buf_priv {
 111         u32 age;
 112         int prim;
 113         int discard;
 114         int dispatched;
 115         drm_r128_freelist_t *list_entry;
 116 } drm_r128_buf_priv_t;
 117
 118                                 /* r128_cce.c */
 119 extern int r128_cce_init( DRM_IOCTL_ARGS );
 120 extern int r128_cce_start( DRM_IOCTL_ARGS );
 121 extern int r128_cce_stop( DRM_IOCTL_ARGS );
 122 extern int r128_cce_reset( DRM_IOCTL_ARGS );
 123 extern int r128_cce_idle( DRM_IOCTL_ARGS );
 124 extern int r128_engine_reset( DRM_IOCTL_ARGS );
 125 extern int r128_fullscreen( DRM_IOCTL_ARGS );
 126 extern int r128_cce_buffers( DRM_IOCTL_ARGS );
 127 extern int r128_getparam( DRM_IOCTL_ARGS );
 128
 129 extern void r128_freelist_reset( drm_device_t *dev );
 130 extern drm_buf_t *r128_freelist_get( drm_device_t *dev );
 131
 132 extern int r128_wait_ring( drm_r128_private_t *dev_priv, int n );
 133
 134 static __inline__ void
 135 r128_update_ring_snapshot( drm_r128_ring_buffer_t *ring )
 136 {
 137         ring->space = (GET_RING_HEAD( ring ) - ring->tail) * sizeof(u32);
 138         if ( ring->space <= 0 )
 139                 ring->space += ring->size;
 140 }
 141
 142 extern int r128_do_cce_idle( drm_r128_private_t *dev_priv );
 143 extern int r128_do_cleanup_cce( drm_device_t *dev );
 144 extern int r128_do_cleanup_pageflip( drm_device_t *dev );
 145
 146                                 /* r128_state.c */
 147 extern int r128_cce_clear( DRM_IOCTL_ARGS );
 148 extern int r128_cce_swap( DRM_IOCTL_ARGS );
 149 extern int r128_cce_vertex( DRM_IOCTL_ARGS );
 150 extern int r128_cce_indices( DRM_IOCTL_ARGS );
 151 extern int r128_cce_blit( DRM_IOCTL_ARGS );
 152 extern int r128_cce_depth( DRM_IOCTL_ARGS );
 153 extern int r128_cce_stipple( DRM_IOCTL_ARGS );
 154 extern int r128_cce_indirect( DRM_IOCTL_ARGS );
 155
 156
 157 /* Register definitions, register access macros and drmAddMap constants
 158  * for Rage 128 kernel driver.
 159  */
 160
 161 #define R128_AUX_SC_CNTL                0x1660
 162 #       define R128_AUX1_SC_EN                  (1 << 0)
 163 #       define R128_AUX1_SC_MODE_OR             (0 << 1)
 164 #       define R128_AUX1_SC_MODE_NAND           (1 << 1)
 165 #       define R128_AUX2_SC_EN                  (1 << 2)
 166 #       define R128_AUX2_SC_MODE_OR             (0 << 3)
 167 #       define R128_AUX2_SC_MODE_NAND           (1 << 3)
 168 #       define R128_AUX3_SC_EN                  (1 << 4)
 169 #       define R128_AUX3_SC_MODE_OR             (0 << 5)
 170 #       define R128_AUX3_SC_MODE_NAND           (1 << 5)
 171 #define R128_AUX1_SC_LEFT               0x1664
 172 #define R128_AUX1_SC_RIGHT              0x1668
 173 #define R128_AUX1_SC_TOP                0x166c
 174 #define R128_AUX1_SC_BOTTOM             0x1670
 175 #define R128_AUX2_SC_LEFT               0x1674
 176 #define R128_AUX2_SC_RIGHT              0x1678
 177 #define R128_AUX2_SC_TOP                0x167c
 178 #define R128_AUX2_SC_BOTTOM             0x1680
 179 #define R128_AUX3_SC_LEFT               0x1684
 180 #define R128_AUX3_SC_RIGHT              0x1688
 181 #define R128_AUX3_SC_TOP                0x168c
 182 #define R128_AUX3_SC_BOTTOM             0x1690
 183
 184 #define R128_BRUSH_DATA0                0x1480
 185 #define R128_BUS_CNTL                   0x0030
 186 #       define R128_BUS_MASTER_DIS              (1 << 6)
 187
 188 #define R128_CLOCK_CNTL_INDEX           0x0008
 189 #define R128_CLOCK_CNTL_DATA            0x000c
 190 #       define R128_PLL_WR_EN                   (1 << 7)
 191 #define R128_CONSTANT_COLOR_C           0x1d34
 192 #define R128_CRTC_OFFSET                0x0224
 193 #define R128_CRTC_OFFSET_CNTL           0x0228
 194 #       define R128_CRTC_OFFSET_FLIP_CNTL       (1 << 16)
 195
 196 #define R128_DP_GUI_MASTER_CNTL         0x146c
 197 #       define R128_GMC_SRC_PITCH_OFFSET_CNTL   (1    <<  0)
 198 #       define R128_GMC_DST_PITCH_OFFSET_CNTL   (1    <<  1)
 199 #       define R128_GMC_BRUSH_SOLID_COLOR       (13   <<  4)
 200 #       define R128_GMC_BRUSH_NONE              (15   <<  4)
 201 #       define R128_GMC_DST_16BPP               (4    <<  8)
 202 #       define R128_GMC_DST_24BPP               (5    <<  8)
 203 #       define R128_GMC_DST_32BPP               (6    <<  8)
 204 #       define R128_GMC_DST_DATATYPE_SHIFT      8
 205 #       define R128_GMC_SRC_DATATYPE_COLOR      (3    << 12)
 206 #       define R128_DP_SRC_SOURCE_MEMORY        (2    << 24)
 207 #       define R128_DP_SRC_SOURCE_HOST_DATA     (3    << 24)
 208 #       define R128_GMC_CLR_CMP_CNTL_DIS        (1    << 28)
 209 #       define R128_GMC_AUX_CLIP_DIS            (1    << 29)
 210 #       define R128_GMC_WR_MSK_DIS              (1    << 30)
 211 #       define R128_ROP3_S                      0x00cc0000
 212 #       define R128_ROP3_P                      0x00f00000
 213 #define R128_DP_WRITE_MASK              0x16cc
 214 #define R128_DST_PITCH_OFFSET_C         0x1c80
 215 #       define R128_DST_TILE                    (1 << 31)
 216
 217 #define R128_GEN_INT_CNTL               0x0040
 218 #       define R128_CRTC_VBLANK_INT_EN          (1 <<  0)
 219 #define R128_GEN_INT_STATUS             0x0044
 220 #       define R128_CRTC_VBLANK_INT             (1 <<  0)
 221 #       define R128_CRTC_VBLANK_INT_AK          (1 <<  0)
 222 #define R128_GEN_RESET_CNTL             0x00f0
 223 #       define R128_SOFT_RESET_GUI              (1 <<  0)
 224
 225 #define R128_GUI_SCRATCH_REG0           0x15e0
 226 #define R128_GUI_SCRATCH_REG1           0x15e4
 227 #define R128_GUI_SCRATCH_REG2           0x15e8
 228 #define R128_GUI_SCRATCH_REG3           0x15ec
 229 #define R128_GUI_SCRATCH_REG4           0x15f0
 230 #define R128_GUI_SCRATCH_REG5           0x15f4
 231
 232 #define R128_GUI_STAT                   0x1740
 233 #       define R128_GUI_FIFOCNT_MASK            0x0fff
 234 #       define R128_GUI_ACTIVE                  (1 << 31)
 235
 236 #define R128_MCLK_CNTL                  0x000f
 237 #       define R128_FORCE_GCP                   (1 << 16)
 238 #       define R128_FORCE_PIPE3D_CP             (1 << 17)
 239 #       define R128_FORCE_RCP                   (1 << 18)
 240
 241 #define R128_PC_GUI_CTLSTAT             0x1748
 242 #define R128_PC_NGUI_CTLSTAT            0x0184
 243 #       define R128_PC_FLUSH_GUI                (3 << 0)
 244 #       define R128_PC_RI_GUI                   (1 << 2)
 245 #       define R128_PC_FLUSH_ALL                0x00ff
 246 #       define R128_PC_BUSY                     (1 << 31)
 247
 248 #define R128_PCI_GART_PAGE              0x017c
 249 #define R128_PRIM_TEX_CNTL_C            0x1cb0
 250
 251 #define R128_SCALE_3D_CNTL              0x1a00
 252 #define R128_SEC_TEX_CNTL_C             0x1d00
 253 #define R128_SEC_TEXTURE_BORDER_COLOR_C 0x1d3c
 254 #define R128_SETUP_CNTL                 0x1bc4
 255 #define R128_STEN_REF_MASK_C            0x1d40
 256
 257 #define R128_TEX_CNTL_C                 0x1c9c
 258 #       define R128_TEX_CACHE_FLUSH             (1 << 23)
 259
 260 #define R128_WAIT_UNTIL                 0x1720
 261 #       define R128_EVENT_CRTC_OFFSET           (1 << 0)
 262 #define R128_WINDOW_XY_OFFSET           0x1bcc
 263
 264
 265 /* CCE registers
 266  */
 267 #define R128_PM4_BUFFER_OFFSET          0x0700
 268 #define R128_PM4_BUFFER_CNTL            0x0704
 269 #       define R128_PM4_MASK                    (15 << 28)
 270 #       define R128_PM4_NONPM4                  (0  << 28)
 271 #       define R128_PM4_192PIO                  (1  << 28)
 272 #       define R128_PM4_192BM                   (2  << 28)
 273 #       define R128_PM4_128PIO_64INDBM          (3  << 28)
 274 #       define R128_PM4_128BM_64INDBM           (4  << 28)
 275 #       define R128_PM4_64PIO_128INDBM          (5  << 28)
 276 #       define R128_PM4_64BM_128INDBM           (6  << 28)
 277 #       define R128_PM4_64PIO_64VCBM_64INDBM    (7  << 28)
 278 #       define R128_PM4_64BM_64VCBM_64INDBM     (8  << 28)
 279 #       define R128_PM4_64PIO_64VCPIO_64INDPIO  (15 << 28)
 280
 281 #define R128_PM4_BUFFER_WM_CNTL         0x0708
 282 #       define R128_WMA_SHIFT                   0
 283 #       define R128_WMB_SHIFT                   8
 284 #       define R128_WMC_SHIFT                   16
 285 #       define R128_WB_WM_SHIFT                 24
 286
 287 #define R128_PM4_BUFFER_DL_RPTR_ADDR    0x070c
 288 #define R128_PM4_BUFFER_DL_RPTR         0x0710
 289 #define R128_PM4_BUFFER_DL_WPTR         0x0714
 290 #       define R128_PM4_BUFFER_DL_DONE          (1 << 31)
 291
 292 #define R128_PM4_VC_FPU_SETUP           0x071c
 293
 294 #define R128_PM4_IW_INDOFF              0x0738
 295 #define R128_PM4_IW_INDSIZE             0x073c
 296
 297 #define R128_PM4_STAT                   0x07b8
 298 #       define R128_PM4_FIFOCNT_MASK            0x0fff
 299 #       define R128_PM4_BUSY                    (1 << 16)
 300 #       define R128_PM4_GUI_ACTIVE              (1 << 31)
 301
 302 #define R128_PM4_MICROCODE_ADDR         0x07d4
 303 #define R128_PM4_MICROCODE_RADDR        0x07d8
 304 #define R128_PM4_MICROCODE_DATAH        0x07dc
 305 #define R128_PM4_MICROCODE_DATAL        0x07e0
 306
 307 #define R128_PM4_BUFFER_ADDR            0x07f0
 308 #define R128_PM4_MICRO_CNTL             0x07fc
 309 #       define R128_PM4_MICRO_FREERUN           (1 << 30)
 310
 311 #define R128_PM4_FIFO_DATA_EVEN         0x1000
 312 #define R128_PM4_FIFO_DATA_ODD          0x1004
 313
 314
 315 /* CCE command packets
 316  */
 317 #define R128_CCE_PACKET0                0x00000000
 318 #define R128_CCE_PACKET1                0x40000000
 319 #define R128_CCE_PACKET2                0x80000000
 320 #define R128_CCE_PACKET3                0xC0000000
 321 #       define R128_CNTL_HOSTDATA_BLT           0x00009400
 322 #       define R128_CNTL_PAINT_MULTI            0x00009A00
 323 #       define R128_CNTL_BITBLT_MULTI           0x00009B00
 324 #       define R128_3D_RNDR_GEN_INDX_PRIM       0x00002300
 325
 326 #define R128_CCE_PACKET_MASK            0xC0000000
 327 #define R128_CCE_PACKET_COUNT_MASK      0x3fff0000
 328 #define R128_CCE_PACKET0_REG_MASK       0x000007ff
 329 #define R128_CCE_PACKET1_REG0_MASK      0x000007ff
 330 #define R128_CCE_PACKET1_REG1_MASK      0x003ff800
 331
 332 #define R128_CCE_VC_CNTL_PRIM_TYPE_NONE         0x00000000
 333 #define R128_CCE_VC_CNTL_PRIM_TYPE_POINT        0x00000001
 334 #define R128_CCE_VC_CNTL_PRIM_TYPE_LINE         0x00000002
 335 #define R128_CCE_VC_CNTL_PRIM_TYPE_POLY_LINE    0x00000003
 336 #define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_LIST     0x00000004
 337 #define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_FAN      0x00000005
 338 #define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_STRIP    0x00000006
 339 #define R128_CCE_VC_CNTL_PRIM_TYPE_TRI_TYPE2    0x00000007
 340 #define R128_CCE_VC_CNTL_PRIM_WALK_IND          0x00000010
 341 #define R128_CCE_VC_CNTL_PRIM_WALK_LIST         0x00000020
 342 #define R128_CCE_VC_CNTL_PRIM_WALK_RING         0x00000030
 343 #define R128_CCE_VC_CNTL_NUM_SHIFT              16
 344
 345 #define R128_DATATYPE_CI8               2
 346 #define R128_DATATYPE_ARGB1555          3
 347 #define R128_DATATYPE_RGB565            4
 348 #define R128_DATATYPE_RGB888            5
 349 #define R128_DATATYPE_ARGB8888          6
 350 #define R128_DATATYPE_RGB332            7
 351 #define R128_DATATYPE_RGB8              9
 352 #define R128_DATATYPE_ARGB4444          15
 353
 354 /* Constants */
 355 #define R128_AGP_OFFSET                 0x02000000
 356
 357 #define R128_WATERMARK_L                16
 358 #define R128_WATERMARK_M                8
 359 #define R128_WATERMARK_N                8
 360 #define R128_WATERMARK_K                128
 361
 362 #define R128_MAX_USEC_TIMEOUT           100000  /* 100 ms */
 363
 364 #define R128_LAST_FRAME_REG             R128_GUI_SCRATCH_REG0
 365 #define R128_LAST_DISPATCH_REG          R128_GUI_SCRATCH_REG1
 366 #define R128_MAX_VB_AGE                 0x7fffffff
 367 #define R128_MAX_VB_VERTS               (0xffff)
 368
 369 #define R128_RING_HIGH_MARK             128
 370
 371 #define R128_PERFORMANCE_BOXES          0
 372
 373
 374 #define R128_BASE(reg)          ((unsigned long)(dev_priv->mmio->handle))
 375 #define R128_ADDR(reg)          (R128_BASE( reg ) + reg)
 376
 377 #define R128_READ(reg)          DRM_READ32(  (volatile u32 *) R128_ADDR(reg) )
 378 #define R128_WRITE(reg,val)     DRM_WRITE32( (volatile u32 *) R128_ADDR(reg), (val) )
 379
 380 #define R128_READ8(reg)         DRM_READ8(  (volatile u8 *) R128_ADDR(reg) )
 381 #define R128_WRITE8(reg,val)    DRM_WRITE8( (volatile u8 *) R128_ADDR(reg), (val) )
 382
 383 #define R128_WRITE_PLL(addr,val)                                        \
 384 do {                                                                    \
 385         R128_WRITE8(R128_CLOCK_CNTL_INDEX,                              \
 386                     ((addr) & 0x1f) | R128_PLL_WR_EN);                  \
 387         R128_WRITE(R128_CLOCK_CNTL_DATA, (val));                        \
 388 } while (0)
 389
 390 extern int R128_READ_PLL(drm_device_t *dev, int addr);
 391
 392
 393 #define CCE_PACKET0( reg, n )           (R128_CCE_PACKET0 |             \
 394                                          ((n) << 16) | ((reg) >> 2))
 395 #define CCE_PACKET1( reg0, reg1 )       (R128_CCE_PACKET1 |             \
 396                                          (((reg1) >> 2) << 11) | ((reg0) >> 2))
 397 #define CCE_PACKET2()                   (R128_CCE_PACKET2)
 398 #define CCE_PACKET3( pkt, n )           (R128_CCE_PACKET3 |             \
 399                                          (pkt) | ((n) << 16))
 400
 401
 402 /* ================================================================
 403  * Misc helper macros
 404  */
 405
 406 #define LOCK_TEST_WITH_RETURN( dev )                                    \
 407 do {                                                                    \
 408         if ( !_DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ) ||           \
 409              dev->lock.pid != DRM_CURRENTPID ) {                        \
 410                 DRM_ERROR( "%s called without lock held\n", __FUNCTION__ );     \
 411                 return DRM_ERR(EINVAL);                         \
 412         }                                                               \
 413 } while (0)
 414
 415 #define RING_SPACE_TEST_WITH_RETURN( dev_priv )                         \
 416 do {                                                                    \
 417         drm_r128_ring_buffer_t *ring = &dev_priv->ring; int i;          \
 418         if ( ring->space < ring->high_mark ) {                          \
 419                 for ( i = 0 ; i < dev_priv->usec_timeout ; i++ ) {      \
 420                         r128_update_ring_snapshot( ring );              \
 421                         if ( ring->space >= ring->high_mark )           \
 422                                 goto __ring_space_done;                 \
 423                         DRM_UDELAY(1);                          \
 424                 }                                                       \
 425                 DRM_ERROR( "ring space check failed!\n" );              \
 426                 return DRM_ERR(EBUSY);                          \
 427         }                                                               \
 428  __ring_space_done:                                                     \
 429         ;                                                               \
 430 } while (0)
 431
 432 #define VB_AGE_TEST_WITH_RETURN( dev_priv )                             \
 433 do {                                                                    \
 434         drm_r128_sarea_t *sarea_priv = dev_priv->sarea_priv;            \
 435         if ( sarea_priv->last_dispatch >= R128_MAX_VB_AGE ) {           \
 436                 int __ret = r128_do_cce_idle( dev_priv );               \
 437                 if ( __ret ) return __ret;                              \
 438                 sarea_priv->last_dispatch = 0;                          \
 439                 r128_freelist_reset( dev );                             \
 440         }                                                               \
 441 } while (0)
 442
 443 #define R128_WAIT_UNTIL_PAGE_FLIPPED() do {                             \
 444         OUT_RING( CCE_PACKET0( R128_WAIT_UNTIL, 0 ) );                  \
 445         OUT_RING( R128_EVENT_CRTC_OFFSET );                             \
 446 } while (0)
 447
 448
 449 /* ================================================================
 450  * Ring control
 451  */
 452
 453 #if defined(__powerpc__)
 454 #define r128_flush_write_combine()      (void) GET_RING_HEAD( &dev_priv->ring )
 455 #else
 456 #define r128_flush_write_combine()      DRM_WRITEMEMORYBARRIER()
 457 #endif
 458
 459
 460 #define R128_VERBOSE    0
 461
 462 #define RING_LOCALS                                                     \
 463         int write; unsigned int tail_mask; volatile u32 *ring;
 464
 465 #define BEGIN_RING( n ) do {                                            \
 466         if ( R128_VERBOSE ) {                                           \
 467                 DRM_INFO( "BEGIN_RING( %d ) in %s\n",                   \
 468                            (n), __FUNCTION__ );                         \
 469         }                                                               \
 470         if ( dev_priv->ring.space <= (n) * sizeof(u32) ) {              \
 471                 r128_wait_ring( dev_priv, (n) * sizeof(u32) );          \
 472         }                                                               \
 473         dev_priv->ring.space -= (n) * sizeof(u32);                      \
 474         ring = dev_priv->ring.start;                                    \
 475         write = dev_priv->ring.tail;                                    \
 476         tail_mask = dev_priv->ring.tail_mask;                           \
 477 } while (0)
 478
 479 /* You can set this to zero if you want.  If the card locks up, you'll
 480  * need to keep this set.  It works around a bug in early revs of the
 481  * Rage 128 chipset, where the CCE would read 32 dwords past the end of
 482  * the ring buffer before wrapping around.
 483  */
 484 #define R128_BROKEN_CCE 1
 485
 486 #define ADVANCE_RING() do {                                             \
 487         if ( R128_VERBOSE ) {                                           \
 488                 DRM_INFO( "ADVANCE_RING() wr=0x%06x tail=0x%06x\n",     \
 489                           write, dev_priv->ring.tail );                 \
 490         }                                                               \
 491         if ( R128_BROKEN_CCE && write < 32 ) {                          \
 492                 memcpy( dev_priv->ring.end,                             \
 493                         dev_priv->ring.start,                           \
 494                         write * sizeof(u32) );                          \
 495         }                                                               \
 496         r128_flush_write_combine();                                     \
 497         dev_priv->ring.tail = write;                                    \
 498         R128_WRITE( R128_PM4_BUFFER_DL_WPTR, write );                   \
 499 } while (0)
 500
 501 #define OUT_RING( x ) do {                                              \
 502         if ( R128_VERBOSE ) {                                           \
 503                 DRM_INFO( "   OUT_RING( 0x%08x ) at 0x%x\n",            \
 504                            (unsigned int)(x), write );                  \
 505         }                                                               \
 506         ring[write++] = cpu_to_le32( x );                               \
 507         write &= tail_mask;                                             \
 508 } while (0)
 509
 510 #endif /* __R128_DRV_H__ */