drivers/gpu/drm/r128/r128_cce.c

   1 /* r128_cce.c -- ATI Rage 128 driver -*- linux-c -*-
   2  * Created: Wed Apr  5 19:24:19 2000 by kevin@precisioninsight.com
   3  */
   4 /*
   5  * Copyright 2000 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  *    Gareth Hughes <gareth@valinux.com>
  30  */
  31
  32 #include "drmP.h"
  33 #include "drm.h"
  34 #include "r128_drm.h"
  35 #include "r128_drv.h"
  36
  37 #define R128_FIFO_DEBUG         0
  38
  39 /* CCE microcode (from ATI) */
  40 static u32 r128_cce_microcode[] = {
  41         0, 276838400, 0, 268449792, 2, 142, 2, 145, 0, 1076765731, 0,
  42         1617039951, 0, 774592877, 0, 1987540286, 0, 2307490946U, 0,
  43         599558925, 0, 589505315, 0, 596487092, 0, 589505315, 1,
  44         11544576, 1, 206848, 1, 311296, 1, 198656, 2, 912273422, 11,
  45         262144, 0, 0, 1, 33559837, 1, 7438, 1, 14809, 1, 6615, 12, 28,
  46         1, 6614, 12, 28, 2, 23, 11, 18874368, 0, 16790922, 1, 409600, 9,
  47         30, 1, 147854772, 16, 420483072, 3, 8192, 0, 10240, 1, 198656,
  48         1, 15630, 1, 51200, 10, 34858, 9, 42, 1, 33559823, 2, 10276, 1,
  49         15717, 1, 15718, 2, 43, 1, 15936948, 1, 570480831, 1, 14715071,
  50         12, 322123831, 1, 33953125, 12, 55, 1, 33559908, 1, 15718, 2,
  51         46, 4, 2099258, 1, 526336, 1, 442623, 4, 4194365, 1, 509952, 1,
  52         459007, 3, 0, 12, 92, 2, 46, 12, 176, 1, 15734, 1, 206848, 1,
  53         18432, 1, 133120, 1, 100670734, 1, 149504, 1, 165888, 1,
  54         15975928, 1, 1048576, 6, 3145806, 1, 15715, 16, 2150645232U, 2,
  55         268449859, 2, 10307, 12, 176, 1, 15734, 1, 15735, 1, 15630, 1,
  56         15631, 1, 5253120, 6, 3145810, 16, 2150645232U, 1, 15864, 2, 82,
  57         1, 343310, 1, 1064207, 2, 3145813, 1, 15728, 1, 7817, 1, 15729,
  58         3, 15730, 12, 92, 2, 98, 1, 16168, 1, 16167, 1, 16002, 1, 16008,
  59         1, 15974, 1, 15975, 1, 15990, 1, 15976, 1, 15977, 1, 15980, 0,
  60         15981, 1, 10240, 1, 5253120, 1, 15720, 1, 198656, 6, 110, 1,
  61         180224, 1, 103824738, 2, 112, 2, 3145839, 0, 536885440, 1,
  62         114880, 14, 125, 12, 206975, 1, 33559995, 12, 198784, 0,
  63         33570236, 1, 15803, 0, 15804, 3, 294912, 1, 294912, 3, 442370,
  64         1, 11544576, 0, 811612160, 1, 12593152, 1, 11536384, 1,
  65         14024704, 7, 310382726, 0, 10240, 1, 14796, 1, 14797, 1, 14793,
  66         1, 14794, 0, 14795, 1, 268679168, 1, 9437184, 1, 268449792, 1,
  67         198656, 1, 9452827, 1, 1075854602, 1, 1075854603, 1, 557056, 1,
  68         114880, 14, 159, 12, 198784, 1, 1109409213, 12, 198783, 1,
  69         1107312059, 12, 198784, 1, 1109409212, 2, 162, 1, 1075854781, 1,
  70         1073757627, 1, 1075854780, 1, 540672, 1, 10485760, 6, 3145894,
  71         16, 274741248, 9, 168, 3, 4194304, 3, 4209949, 0, 0, 0, 256, 14,
  72         174, 1, 114857, 1, 33560007, 12, 176, 0, 10240, 1, 114858, 1,
  73         33560018, 1, 114857, 3, 33560007, 1, 16008, 1, 114874, 1,
  74         33560360, 1, 114875, 1, 33560154, 0, 15963, 0, 256, 0, 4096, 1,
  75         409611, 9, 188, 0, 10240, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  76         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  77         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  78         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  79         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  80         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  81         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  82 };
  83
  84 static int R128_READ_PLL(struct drm_device * dev, int addr)
  85 {
  86         drm_r128_private_t *dev_priv = dev->dev_private;
  87
  88         R128_WRITE8(R128_CLOCK_CNTL_INDEX, addr & 0x1f);
  89         return R128_READ(R128_CLOCK_CNTL_DATA);
  90 }
  91
  92 #if R128_FIFO_DEBUG
  93 static void r128_status(drm_r128_private_t * dev_priv)
  94 {
  95         printk("GUI_STAT           = 0x%08x\n",
  96                (unsigned int)R128_READ(R128_GUI_STAT));
  97         printk("PM4_STAT           = 0x%08x\n",
  98                (unsigned int)R128_READ(R128_PM4_STAT));
  99         printk("PM4_BUFFER_DL_WPTR = 0x%08x\n",
 100                (unsigned int)R128_READ(R128_PM4_BUFFER_DL_WPTR));
 101         printk("PM4_BUFFER_DL_RPTR = 0x%08x\n",
 102                (unsigned int)R128_READ(R128_PM4_BUFFER_DL_RPTR));
 103         printk("PM4_MICRO_CNTL     = 0x%08x\n",
 104                (unsigned int)R128_READ(R128_PM4_MICRO_CNTL));
 105         printk("PM4_BUFFER_CNTL    = 0x%08x\n",
 106                (unsigned int)R128_READ(R128_PM4_BUFFER_CNTL));
 107 }
 108 #endif
 109
 110 /* ================================================================
 111  * Engine, FIFO control
 112  */
 113
 114 static int r128_do_pixcache_flush(drm_r128_private_t * dev_priv)
 115 {
 116         u32 tmp;
 117         int i;
 118
 119         tmp = R128_READ(R128_PC_NGUI_CTLSTAT) | R128_PC_FLUSH_ALL;
 120         R128_WRITE(R128_PC_NGUI_CTLSTAT, tmp);
 121
 122         for (i = 0; i < dev_priv->usec_timeout; i++) {
 123                 if (!(R128_READ(R128_PC_NGUI_CTLSTAT) & R128_PC_BUSY)) {
 124                         return 0;
 125                 }
 126                 DRM_UDELAY(1);
 127         }
 128
 129 #if R128_FIFO_DEBUG
 130         DRM_ERROR("failed!\n");
 131 #endif
 132         return -EBUSY;
 133 }
 134
 135 static int r128_do_wait_for_fifo(drm_r128_private_t * dev_priv, int entries)
 136 {
 137         int i;
 138
 139         for (i = 0; i < dev_priv->usec_timeout; i++) {
 140                 int slots = R128_READ(R128_GUI_STAT) & R128_GUI_FIFOCNT_MASK;
 141                 if (slots >= entries)
 142                         return 0;
 143                 DRM_UDELAY(1);
 144         }
 145
 146 #if R128_FIFO_DEBUG
 147         DRM_ERROR("failed!\n");
 148 #endif
 149         return -EBUSY;
 150 }
 151
 152 static int r128_do_wait_for_idle(drm_r128_private_t * dev_priv)
 153 {
 154         int i, ret;
 155
 156         ret = r128_do_wait_for_fifo(dev_priv, 64);
 157         if (ret)
 158                 return ret;
 159
 160         for (i = 0; i < dev_priv->usec_timeout; i++) {
 161                 if (!(R128_READ(R128_GUI_STAT) & R128_GUI_ACTIVE)) {
 162                         r128_do_pixcache_flush(dev_priv);
 163                         return 0;
 164                 }
 165                 DRM_UDELAY(1);
 166         }
 167
 168 #if R128_FIFO_DEBUG
 169         DRM_ERROR("failed!\n");
 170 #endif
 171         return -EBUSY;
 172 }
 173
 174 /* ================================================================
 175  * CCE control, initialization
 176  */
 177
 178 /* Load the microcode for the CCE */
 179 static void r128_cce_load_microcode(drm_r128_private_t * dev_priv)
 180 {
 181         int i;
 182
 183         DRM_DEBUG("\n");
 184
 185         r128_do_wait_for_idle(dev_priv);
 186
 187         R128_WRITE(R128_PM4_MICROCODE_ADDR, 0);
 188         for (i = 0; i < 256; i++) {
 189                 R128_WRITE(R128_PM4_MICROCODE_DATAH, r128_cce_microcode[i * 2]);
 190                 R128_WRITE(R128_PM4_MICROCODE_DATAL,
 191                            r128_cce_microcode[i * 2 + 1]);
 192         }
 193 }
 194
 195 /* Flush any pending commands to the CCE.  This should only be used just
 196  * prior to a wait for idle, as it informs the engine that the command
 197  * stream is ending.
 198  */
 199 static void r128_do_cce_flush(drm_r128_private_t * dev_priv)
 200 {
 201         u32 tmp;
 202
 203         tmp = R128_READ(R128_PM4_BUFFER_DL_WPTR) | R128_PM4_BUFFER_DL_DONE;
 204         R128_WRITE(R128_PM4_BUFFER_DL_WPTR, tmp);
 205 }
 206
 207 /* Wait for the CCE to go idle.
 208  */
 209 int r128_do_cce_idle(drm_r128_private_t * dev_priv)
 210 {
 211         int i;
 212
 213         for (i = 0; i < dev_priv->usec_timeout; i++) {
 214                 if (GET_RING_HEAD(dev_priv) == dev_priv->ring.tail) {
 215                         int pm4stat = R128_READ(R128_PM4_STAT);
 216                         if (((pm4stat & R128_PM4_FIFOCNT_MASK) >=
 217                              dev_priv->cce_fifo_size) &&
 218                             !(pm4stat & (R128_PM4_BUSY |
 219                                          R128_PM4_GUI_ACTIVE))) {
 220                                 return r128_do_pixcache_flush(dev_priv);
 221                         }
 222                 }
 223                 DRM_UDELAY(1);
 224         }
 225
 226 #if R128_FIFO_DEBUG
 227         DRM_ERROR("failed!\n");
 228         r128_status(dev_priv);
 229 #endif
 230         return -EBUSY;
 231 }
 232
 233 /* Start the Concurrent Command Engine.
 234  */
 235 static void r128_do_cce_start(drm_r128_private_t * dev_priv)
 236 {
 237         r128_do_wait_for_idle(dev_priv);
 238
 239         R128_WRITE(R128_PM4_BUFFER_CNTL,
 240                    dev_priv->cce_mode | dev_priv->ring.size_l2qw
 241                    | R128_PM4_BUFFER_CNTL_NOUPDATE);
 242         R128_READ(R128_PM4_BUFFER_ADDR);        /* as per the sample code */
 243         R128_WRITE(R128_PM4_MICRO_CNTL, R128_PM4_MICRO_FREERUN);
 244
 245         dev_priv->cce_running = 1;
 246 }
 247
 248 /* Reset the Concurrent Command Engine.  This will not flush any pending
 249  * commands, so you must wait for the CCE command stream to complete
 250  * before calling this routine.
 251  */
 252 static void r128_do_cce_reset(drm_r128_private_t * dev_priv)
 253 {
 254         R128_WRITE(R128_PM4_BUFFER_DL_WPTR, 0);
 255         R128_WRITE(R128_PM4_BUFFER_DL_RPTR, 0);
 256         dev_priv->ring.tail = 0;
 257 }
 258
 259 /* Stop the Concurrent Command Engine.  This will not flush any pending
 260  * commands, so you must flush the command stream and wait for the CCE
 261  * to go idle before calling this routine.
 262  */
 263 static void r128_do_cce_stop(drm_r128_private_t * dev_priv)
 264 {
 265         R128_WRITE(R128_PM4_MICRO_CNTL, 0);
 266         R128_WRITE(R128_PM4_BUFFER_CNTL,
 267                    R128_PM4_NONPM4 | R128_PM4_BUFFER_CNTL_NOUPDATE);
 268
 269         dev_priv->cce_running = 0;
 270 }
 271
 272 /* Reset the engine.  This will stop the CCE if it is running.
 273  */
 274 static int r128_do_engine_reset(struct drm_device * dev)
 275 {
 276         drm_r128_private_t *dev_priv = dev->dev_private;
 277         u32 clock_cntl_index, mclk_cntl, gen_reset_cntl;
 278
 279         r128_do_pixcache_flush(dev_priv);
 280
 281         clock_cntl_index = R128_READ(R128_CLOCK_CNTL_INDEX);
 282         mclk_cntl = R128_READ_PLL(dev, R128_MCLK_CNTL);
 283
 284         R128_WRITE_PLL(R128_MCLK_CNTL,
 285                        mclk_cntl | R128_FORCE_GCP | R128_FORCE_PIPE3D_CP);
 286
 287         gen_reset_cntl = R128_READ(R128_GEN_RESET_CNTL);
 288
 289         /* Taken from the sample code - do not change */
 290         R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl | R128_SOFT_RESET_GUI);
 291         R128_READ(R128_GEN_RESET_CNTL);
 292         R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl & ~R128_SOFT_RESET_GUI);
 293         R128_READ(R128_GEN_RESET_CNTL);
 294
 295         R128_WRITE_PLL(R128_MCLK_CNTL, mclk_cntl);
 296         R128_WRITE(R128_CLOCK_CNTL_INDEX, clock_cntl_index);
 297         R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl);
 298
 299         /* Reset the CCE ring */
 300         r128_do_cce_reset(dev_priv);
 301
 302         /* The CCE is no longer running after an engine reset */
 303         dev_priv->cce_running = 0;
 304
 305         /* Reset any pending vertex, indirect buffers */
 306         r128_freelist_reset(dev);
 307
 308         return 0;
 309 }
 310
 311 static void r128_cce_init_ring_buffer(struct drm_device * dev,
 312                                       drm_r128_private_t * dev_priv)
 313 {
 314         u32 ring_start;
 315         u32 tmp;
 316
 317         DRM_DEBUG("\n");
 318
 319         /* The manual (p. 2) says this address is in "VM space".  This
 320          * means it's an offset from the start of AGP space.
 321          */
 322 #if __OS_HAS_AGP
 323         if (!dev_priv->is_pci)
 324                 ring_start = dev_priv->cce_ring->offset - dev->agp->base;
 325         else
 326 #endif
 327                 ring_start = dev_priv->cce_ring->offset -
 328                     (unsigned long)dev->sg->virtual;
 329
 330         R128_WRITE(R128_PM4_BUFFER_OFFSET, ring_start | R128_AGP_OFFSET);
 331
 332         R128_WRITE(R128_PM4_BUFFER_DL_WPTR, 0);
 333         R128_WRITE(R128_PM4_BUFFER_DL_RPTR, 0);
 334
 335         /* Set watermark control */
 336         R128_WRITE(R128_PM4_BUFFER_WM_CNTL,
 337                    ((R128_WATERMARK_L / 4) << R128_WMA_SHIFT)
 338                    | ((R128_WATERMARK_M / 4) << R128_WMB_SHIFT)
 339                    | ((R128_WATERMARK_N / 4) << R128_WMC_SHIFT)
 340                    | ((R128_WATERMARK_K / 64) << R128_WB_WM_SHIFT));
 341
 342         /* Force read.  Why?  Because it's in the examples... */
 343         R128_READ(R128_PM4_BUFFER_ADDR);
 344
 345         /* Turn on bus mastering */
 346         tmp = R128_READ(R128_BUS_CNTL) & ~R128_BUS_MASTER_DIS;
 347         R128_WRITE(R128_BUS_CNTL, tmp);
 348 }
 349
 350 static int r128_do_init_cce(struct drm_device * dev, drm_r128_init_t * init)
 351 {
 352         drm_r128_private_t *dev_priv;
 353
 354         DRM_DEBUG("\n");
 355
 356         dev_priv = drm_alloc(sizeof(drm_r128_private_t), DRM_MEM_DRIVER);
 357         if (dev_priv == NULL)
 358                 return -ENOMEM;
 359
 360         memset(dev_priv, 0, sizeof(drm_r128_private_t));
 361
 362         dev_priv->is_pci = init->is_pci;
 363
 364         if (dev_priv->is_pci && !dev->sg) {
 365                 DRM_ERROR("PCI GART memory not allocated!\n");
 366                 dev->dev_private = (void *)dev_priv;
 367                 r128_do_cleanup_cce(dev);
 368                 return -EINVAL;
 369         }
 370
 371         dev_priv->usec_timeout = init->usec_timeout;
 372         if (dev_priv->usec_timeout < 1 ||
 373             dev_priv->usec_timeout > R128_MAX_USEC_TIMEOUT) {
 374                 DRM_DEBUG("TIMEOUT problem!\n");
 375                 dev->dev_private = (void *)dev_priv;
 376                 r128_do_cleanup_cce(dev);
 377                 return -EINVAL;
 378         }
 379
 380         dev_priv->cce_mode = init->cce_mode;
 381
 382         /* GH: Simple idle check.
 383          */
 384         atomic_set(&dev_priv->idle_count, 0);
 385
 386         /* We don't support anything other than bus-mastering ring mode,
 387          * but the ring can be in either AGP or PCI space for the ring
 388          * read pointer.
 389          */
 390         if ((init->cce_mode != R128_PM4_192BM) &&
 391             (init->cce_mode != R128_PM4_128BM_64INDBM) &&
 392             (init->cce_mode != R128_PM4_64BM_128INDBM) &&
 393             (init->cce_mode != R128_PM4_64BM_64VCBM_64INDBM)) {
 394                 DRM_DEBUG("Bad cce_mode!\n");
 395                 dev->dev_private = (void *)dev_priv;
 396                 r128_do_cleanup_cce(dev);
 397                 return -EINVAL;
 398         }
 399
 400         switch (init->cce_mode) {
 401         case R128_PM4_NONPM4:
 402                 dev_priv->cce_fifo_size = 0;
 403                 break;
 404         case R128_PM4_192PIO:
 405         case R128_PM4_192BM:
 406                 dev_priv->cce_fifo_size = 192;
 407                 break;
 408         case R128_PM4_128PIO_64INDBM:
 409         case R128_PM4_128BM_64INDBM:
 410                 dev_priv->cce_fifo_size = 128;
 411                 break;
 412         case R128_PM4_64PIO_128INDBM:
 413         case R128_PM4_64BM_128INDBM:
 414         case R128_PM4_64PIO_64VCBM_64INDBM:
 415         case R128_PM4_64BM_64VCBM_64INDBM:
 416         case R128_PM4_64PIO_64VCPIO_64INDPIO:
 417                 dev_priv->cce_fifo_size = 64;
 418                 break;
 419         }
 420
 421         switch (init->fb_bpp) {
 422         case 16:
 423                 dev_priv->color_fmt = R128_DATATYPE_RGB565;
 424                 break;
 425         case 32:
 426         default:
 427                 dev_priv->color_fmt = R128_DATATYPE_ARGB8888;
 428                 break;
 429         }
 430         dev_priv->front_offset = init->front_offset;
 431         dev_priv->front_pitch = init->front_pitch;
 432         dev_priv->back_offset = init->back_offset;
 433         dev_priv->back_pitch = init->back_pitch;
 434
 435         switch (init->depth_bpp) {
 436         case 16:
 437                 dev_priv->depth_fmt = R128_DATATYPE_RGB565;
 438                 break;
 439         case 24:
 440         case 32:
 441         default:
 442                 dev_priv->depth_fmt = R128_DATATYPE_ARGB8888;
 443                 break;
 444         }
 445         dev_priv->depth_offset = init->depth_offset;
 446         dev_priv->depth_pitch = init->depth_pitch;
 447         dev_priv->span_offset = init->span_offset;
 448
 449         dev_priv->front_pitch_offset_c = (((dev_priv->front_pitch / 8) << 21) |
 450                                           (dev_priv->front_offset >> 5));
 451         dev_priv->back_pitch_offset_c = (((dev_priv->back_pitch / 8) << 21) |
 452                                          (dev_priv->back_offset >> 5));
 453         dev_priv->depth_pitch_offset_c = (((dev_priv->depth_pitch / 8) << 21) |
 454                                           (dev_priv->depth_offset >> 5) |
 455                                           R128_DST_TILE);
 456         dev_priv->span_pitch_offset_c = (((dev_priv->depth_pitch / 8) << 21) |
 457                                          (dev_priv->span_offset >> 5));
 458
 459         dev_priv->sarea = drm_getsarea(dev);
 460         if (!dev_priv->sarea) {
 461                 DRM_ERROR("could not find sarea!\n");
 462                 dev->dev_private = (void *)dev_priv;
 463                 r128_do_cleanup_cce(dev);
 464                 return -EINVAL;
 465         }
 466
 467         dev_priv->mmio = drm_core_findmap(dev, init->mmio_offset);
 468         if (!dev_priv->mmio) {
 469                 DRM_ERROR("could not find mmio region!\n");
 470                 dev->dev_private = (void *)dev_priv;
 471                 r128_do_cleanup_cce(dev);
 472                 return -EINVAL;
 473         }
 474         dev_priv->cce_ring = drm_core_findmap(dev, init->ring_offset);
 475         if (!dev_priv->cce_ring) {
 476                 DRM_ERROR("could not find cce ring region!\n");
 477                 dev->dev_private = (void *)dev_priv;
 478                 r128_do_cleanup_cce(dev);
 479                 return -EINVAL;
 480         }
 481         dev_priv->ring_rptr = drm_core_findmap(dev, init->ring_rptr_offset);
 482         if (!dev_priv->ring_rptr) {
 483                 DRM_ERROR("could not find ring read pointer!\n");
 484                 dev->dev_private = (void *)dev_priv;
 485                 r128_do_cleanup_cce(dev);
 486                 return -EINVAL;
 487         }
 488         dev->agp_buffer_token = init->buffers_offset;
 489         dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
 490         if (!dev->agp_buffer_map) {
 491                 DRM_ERROR("could not find dma buffer region!\n");
 492                 dev->dev_private = (void *)dev_priv;
 493                 r128_do_cleanup_cce(dev);
 494                 return -EINVAL;
 495         }
 496
 497         if (!dev_priv->is_pci) {
 498                 dev_priv->agp_textures =
 499                     drm_core_findmap(dev, init->agp_textures_offset);
 500                 if (!dev_priv->agp_textures) {
 501                         DRM_ERROR("could not find agp texture region!\n");
 502                         dev->dev_private = (void *)dev_priv;
 503                         r128_do_cleanup_cce(dev);
 504                         return -EINVAL;
 505                 }
 506         }
 507
 508         dev_priv->sarea_priv =
 509             (drm_r128_sarea_t *) ((u8 *) dev_priv->sarea->handle +
 510                                   init->sarea_priv_offset);
 511
 512 #if __OS_HAS_AGP
 513         if (!dev_priv->is_pci) {
 514                 drm_core_ioremap(dev_priv->cce_ring, dev);
 515                 drm_core_ioremap(dev_priv->ring_rptr, dev);
 516                 drm_core_ioremap(dev->agp_buffer_map, dev);
 517                 if (!dev_priv->cce_ring->handle ||
 518                     !dev_priv->ring_rptr->handle ||
 519                     !dev->agp_buffer_map->handle) {
 520                         DRM_ERROR("Could not ioremap agp regions!\n");
 521                         dev->dev_private = (void *)dev_priv;
 522                         r128_do_cleanup_cce(dev);
 523                         return -ENOMEM;
 524                 }
 525         } else
 526 #endif
 527         {
 528                 dev_priv->cce_ring->handle =
 529                         (void *)(unsigned long)dev_priv->cce_ring->offset;
 530                 dev_priv->ring_rptr->handle =
 531                         (void *)(unsigned long)dev_priv->ring_rptr->offset;
 532                 dev->agp_buffer_map->handle =
 533                         (void *)(unsigned long)dev->agp_buffer_map->offset;
 534         }
 535
 536 #if __OS_HAS_AGP
 537         if (!dev_priv->is_pci)
 538                 dev_priv->cce_buffers_offset = dev->agp->base;
 539         else
 540 #endif
 541                 dev_priv->cce_buffers_offset = (unsigned long)dev->sg->virtual;
 542
 543         dev_priv->ring.start = (u32 *) dev_priv->cce_ring->handle;
 544         dev_priv->ring.end = ((u32 *) dev_priv->cce_ring->handle
 545                               + init->ring_size / sizeof(u32));
 546         dev_priv->ring.size = init->ring_size;
 547         dev_priv->ring.size_l2qw = drm_order(init->ring_size / 8);
 548
 549         dev_priv->ring.tail_mask = (dev_priv->ring.size / sizeof(u32)) - 1;
 550
 551         dev_priv->ring.high_mark = 128;
 552
 553         dev_priv->sarea_priv->last_frame = 0;
 554         R128_WRITE(R128_LAST_FRAME_REG, dev_priv->sarea_priv->last_frame);
 555
 556         dev_priv->sarea_priv->last_dispatch = 0;
 557         R128_WRITE(R128_LAST_DISPATCH_REG, dev_priv->sarea_priv->last_dispatch);
 558
 559 #if __OS_HAS_AGP
 560         if (dev_priv->is_pci) {
 561 #endif
 562                 dev_priv->gart_info.table_mask = DMA_BIT_MASK(32);
 563                 dev_priv->gart_info.gart_table_location = DRM_ATI_GART_MAIN;
 564                 dev_priv->gart_info.table_size = R128_PCIGART_TABLE_SIZE;
 565                 dev_priv->gart_info.addr = NULL;
 566                 dev_priv->gart_info.bus_addr = 0;
 567                 dev_priv->gart_info.gart_reg_if = DRM_ATI_GART_PCI;
 568                 if (!drm_ati_pcigart_init(dev, &dev_priv->gart_info)) {
 569                         DRM_ERROR("failed to init PCI GART!\n");
 570                         dev->dev_private = (void *)dev_priv;
 571                         r128_do_cleanup_cce(dev);
 572                         return -ENOMEM;
 573                 }
 574                 R128_WRITE(R128_PCI_GART_PAGE, dev_priv->gart_info.bus_addr);
 575 #if __OS_HAS_AGP
 576         }
 577 #endif
 578
 579         r128_cce_init_ring_buffer(dev, dev_priv);
 580         r128_cce_load_microcode(dev_priv);
 581
 582         dev->dev_private = (void *)dev_priv;
 583
 584         r128_do_engine_reset(dev);
 585
 586         return 0;
 587 }
 588
 589 int r128_do_cleanup_cce(struct drm_device * dev)
 590 {
 591
 592         /* Make sure interrupts are disabled here because the uninstall ioctl
 593          * may not have been called from userspace and after dev_private
 594          * is freed, it's too late.
 595          */
 596         if (dev->irq_enabled)
 597                 drm_irq_uninstall(dev);
 598
 599         if (dev->dev_private) {
 600                 drm_r128_private_t *dev_priv = dev->dev_private;
 601
 602 #if __OS_HAS_AGP
 603                 if (!dev_priv->is_pci) {
 604                         if (dev_priv->cce_ring != NULL)
 605                                 drm_core_ioremapfree(dev_priv->cce_ring, dev);
 606                         if (dev_priv->ring_rptr != NULL)
 607                                 drm_core_ioremapfree(dev_priv->ring_rptr, dev);
 608                         if (dev->agp_buffer_map != NULL) {
 609                                 drm_core_ioremapfree(dev->agp_buffer_map, dev);
 610                                 dev->agp_buffer_map = NULL;
 611                         }
 612                 } else
 613 #endif
 614                 {
 615                         if (dev_priv->gart_info.bus_addr)
 616                                 if (!drm_ati_pcigart_cleanup(dev,
 617                                                         &dev_priv->gart_info))
 618                                         DRM_ERROR
 619                                             ("failed to cleanup PCI GART!\n");
 620                 }
 621
 622                 drm_free(dev->dev_private, sizeof(drm_r128_private_t),
 623                          DRM_MEM_DRIVER);
 624                 dev->dev_private = NULL;
 625         }
 626
 627         return 0;
 628 }
 629
 630 int r128_cce_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
 631 {
 632         drm_r128_init_t *init = data;
 633
 634         DRM_DEBUG("\n");
 635
 636         LOCK_TEST_WITH_RETURN(dev, file_priv);
 637
 638         switch (init->func) {
 639         case R128_INIT_CCE:
 640                 return r128_do_init_cce(dev, init);
 641         case R128_CLEANUP_CCE:
 642                 return r128_do_cleanup_cce(dev);
 643         }
 644
 645         return -EINVAL;
 646 }
 647
 648 int r128_cce_start(struct drm_device *dev, void *data, struct drm_file *file_priv)
 649 {
 650         drm_r128_private_t *dev_priv = dev->dev_private;
 651         DRM_DEBUG("\n");
 652
 653         LOCK_TEST_WITH_RETURN(dev, file_priv);
 654
 655         if (dev_priv->cce_running || dev_priv->cce_mode == R128_PM4_NONPM4) {
 656                 DRM_DEBUG("while CCE running\n");
 657                 return 0;
 658         }
 659
 660         r128_do_cce_start(dev_priv);
 661
 662         return 0;
 663 }
 664
 665 /* Stop the CCE.  The engine must have been idled before calling this
 666  * routine.
 667  */
 668 int r128_cce_stop(struct drm_device *dev, void *data, struct drm_file *file_priv)
 669 {
 670         drm_r128_private_t *dev_priv = dev->dev_private;
 671         drm_r128_cce_stop_t *stop = data;
 672         int ret;
 673         DRM_DEBUG("\n");
 674
 675         LOCK_TEST_WITH_RETURN(dev, file_priv);
 676
 677         /* Flush any pending CCE commands.  This ensures any outstanding
 678          * commands are exectuted by the engine before we turn it off.
 679          */
 680         if (stop->flush) {
 681                 r128_do_cce_flush(dev_priv);
 682         }
 683
 684         /* If we fail to make the engine go idle, we return an error
 685          * code so that the DRM ioctl wrapper can try again.
 686          */
 687         if (stop->idle) {
 688                 ret = r128_do_cce_idle(dev_priv);
 689                 if (ret)
 690                         return ret;
 691         }
 692
 693         /* Finally, we can turn off the CCE.  If the engine isn't idle,
 694          * we will get some dropped triangles as they won't be fully
 695          * rendered before the CCE is shut down.
 696          */
 697         r128_do_cce_stop(dev_priv);
 698
 699         /* Reset the engine */
 700         r128_do_engine_reset(dev);
 701
 702         return 0;
 703 }
 704
 705 /* Just reset the CCE ring.  Called as part of an X Server engine reset.
 706  */
 707 int r128_cce_reset(struct drm_device *dev, void *data, struct drm_file *file_priv)
 708 {
 709         drm_r128_private_t *dev_priv = dev->dev_private;
 710         DRM_DEBUG("\n");
 711
 712         LOCK_TEST_WITH_RETURN(dev, file_priv);
 713
 714         if (!dev_priv) {
 715                 DRM_DEBUG("called before init done\n");
 716                 return -EINVAL;
 717         }
 718
 719         r128_do_cce_reset(dev_priv);
 720
 721         /* The CCE is no longer running after an engine reset */
 722         dev_priv->cce_running = 0;
 723
 724         return 0;
 725 }
 726
 727 int r128_cce_idle(struct drm_device *dev, void *data, struct drm_file *file_priv)
 728 {
 729         drm_r128_private_t *dev_priv = dev->dev_private;
 730         DRM_DEBUG("\n");
 731
 732         LOCK_TEST_WITH_RETURN(dev, file_priv);
 733
 734         if (dev_priv->cce_running) {
 735                 r128_do_cce_flush(dev_priv);
 736         }
 737
 738         return r128_do_cce_idle(dev_priv);
 739 }
 740
 741 int r128_engine_reset(struct drm_device *dev, void *data, struct drm_file *file_priv)
 742 {
 743         DRM_DEBUG("\n");
 744
 745         LOCK_TEST_WITH_RETURN(dev, file_priv);
 746
 747         return r128_do_engine_reset(dev);
 748 }
 749
 750 int r128_fullscreen(struct drm_device *dev, void *data, struct drm_file *file_priv)
 751 {
 752         return -EINVAL;
 753 }
 754
 755 /* ================================================================
 756  * Freelist management
 757  */
 758 #define R128_BUFFER_USED        0xffffffff
 759 #define R128_BUFFER_FREE        0
 760
 761 #if 0
 762 static int r128_freelist_init(struct drm_device * dev)
 763 {
 764         struct drm_device_dma *dma = dev->dma;
 765         drm_r128_private_t *dev_priv = dev->dev_private;
 766         struct drm_buf *buf;
 767         drm_r128_buf_priv_t *buf_priv;
 768         drm_r128_freelist_t *entry;
 769         int i;
 770
 771         dev_priv->head = drm_alloc(sizeof(drm_r128_freelist_t), DRM_MEM_DRIVER);
 772         if (dev_priv->head == NULL)
 773                 return -ENOMEM;
 774
 775         memset(dev_priv->head, 0, sizeof(drm_r128_freelist_t));
 776         dev_priv->head->age = R128_BUFFER_USED;
 777
 778         for (i = 0; i < dma->buf_count; i++) {
 779                 buf = dma->buflist[i];
 780                 buf_priv = buf->dev_private;
 781
 782                 entry = drm_alloc(sizeof(drm_r128_freelist_t), DRM_MEM_DRIVER);
 783                 if (!entry)
 784                         return -ENOMEM;
 785
 786                 entry->age = R128_BUFFER_FREE;
 787                 entry->buf = buf;
 788                 entry->prev = dev_priv->head;
 789                 entry->next = dev_priv->head->next;
 790                 if (!entry->next)
 791                         dev_priv->tail = entry;
 792
 793                 buf_priv->discard = 0;
 794                 buf_priv->dispatched = 0;
 795                 buf_priv->list_entry = entry;
 796
 797                 dev_priv->head->next = entry;
 798
 799                 if (dev_priv->head->next)
 800                         dev_priv->head->next->prev = entry;
 801         }
 802
 803         return 0;
 804
 805 }
 806 #endif
 807
 808 static struct drm_buf *r128_freelist_get(struct drm_device * dev)
 809 {
 810         struct drm_device_dma *dma = dev->dma;
 811         drm_r128_private_t *dev_priv = dev->dev_private;
 812         drm_r128_buf_priv_t *buf_priv;
 813         struct drm_buf *buf;
 814         int i, t;
 815
 816         /* FIXME: Optimize -- use freelist code */
 817
 818         for (i = 0; i < dma->buf_count; i++) {
 819                 buf = dma->buflist[i];
 820                 buf_priv = buf->dev_private;
 821                 if (!buf->file_priv)
 822                         return buf;
 823         }
 824
 825         for (t = 0; t < dev_priv->usec_timeout; t++) {
 826                 u32 done_age = R128_READ(R128_LAST_DISPATCH_REG);
 827
 828                 for (i = 0; i < dma->buf_count; i++) {
 829                         buf = dma->buflist[i];
 830                         buf_priv = buf->dev_private;
 831                         if (buf->pending && buf_priv->age <= done_age) {
 832                                 /* The buffer has been processed, so it
 833                                  * can now be used.
 834                                  */
 835                                 buf->pending = 0;
 836                                 return buf;
 837                         }
 838                 }
 839                 DRM_UDELAY(1);
 840         }
 841
 842         DRM_DEBUG("returning NULL!\n");
 843         return NULL;
 844 }
 845
 846 void r128_freelist_reset(struct drm_device * dev)
 847 {
 848         struct drm_device_dma *dma = dev->dma;
 849         int i;
 850
 851         for (i = 0; i < dma->buf_count; i++) {
 852                 struct drm_buf *buf = dma->buflist[i];
 853                 drm_r128_buf_priv_t *buf_priv = buf->dev_private;
 854                 buf_priv->age = 0;
 855         }
 856 }
 857
 858 /* ================================================================
 859  * CCE command submission
 860  */
 861
 862 int r128_wait_ring(drm_r128_private_t * dev_priv, int n)
 863 {
 864         drm_r128_ring_buffer_t *ring = &dev_priv->ring;
 865         int i;
 866
 867         for (i = 0; i < dev_priv->usec_timeout; i++) {
 868                 r128_update_ring_snapshot(dev_priv);
 869                 if (ring->space >= n)
 870                         return 0;
 871                 DRM_UDELAY(1);
 872         }
 873
 874         /* FIXME: This is being ignored... */
 875         DRM_ERROR("failed!\n");
 876         return -EBUSY;
 877 }
 878
 879 static int r128_cce_get_buffers(struct drm_device * dev,
 880                                 struct drm_file *file_priv,
 881                                 struct drm_dma * d)
 882 {
 883         int i;
 884         struct drm_buf *buf;
 885
 886         for (i = d->granted_count; i < d->request_count; i++) {
 887                 buf = r128_freelist_get(dev);
 888                 if (!buf)
 889                         return -EAGAIN;
 890
 891                 buf->file_priv = file_priv;
 892
 893                 if (DRM_COPY_TO_USER(&d->request_indices[i], &buf->idx,
 894                                      sizeof(buf->idx)))
 895                         return -EFAULT;
 896                 if (DRM_COPY_TO_USER(&d->request_sizes[i], &buf->total,
 897                                      sizeof(buf->total)))
 898                         return -EFAULT;
 899
 900                 d->granted_count++;
 901         }
 902         return 0;
 903 }
 904
 905 int r128_cce_buffers(struct drm_device *dev, void *data, struct drm_file *file_priv)
 906 {
 907         struct drm_device_dma *dma = dev->dma;
 908         int ret = 0;
 909         struct drm_dma *d = data;
 910
 911         LOCK_TEST_WITH_RETURN(dev, file_priv);
 912
 913         /* Please don't send us buffers.
 914          */
 915         if (d->send_count != 0) {
 916                 DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
 917                           DRM_CURRENTPID, d->send_count);
 918                 return -EINVAL;
 919         }
 920
 921         /* We'll send you buffers.
 922          */
 923         if (d->request_count < 0 || d->request_count > dma->buf_count) {
 924                 DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
 925                           DRM_CURRENTPID, d->request_count, dma->buf_count);
 926                 return -EINVAL;
 927         }
 928
 929         d->granted_count = 0;
 930
 931         if (d->request_count) {
 932                 ret = r128_cce_get_buffers(dev, file_priv, d);
 933         }
 934
 935         return ret;
 936 }