drivers/char/drm/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 = (void *)dev_priv->cce_ring->offset;
 529                 dev_priv->ring_rptr->handle =
 530                     (void *)dev_priv->ring_rptr->offset;
 531                 dev->agp_buffer_map->handle =
 532                     (void *)dev->agp_buffer_map->offset;
 533         }
 534
 535 #if __OS_HAS_AGP
 536         if (!dev_priv->is_pci)
 537                 dev_priv->cce_buffers_offset = dev->agp->base;
 538         else
 539 #endif
 540                 dev_priv->cce_buffers_offset = (unsigned long)dev->sg->virtual;
 541
 542         dev_priv->ring.start = (u32 *) dev_priv->cce_ring->handle;
 543         dev_priv->ring.end = ((u32 *) dev_priv->cce_ring->handle
 544                               + init->ring_size / sizeof(u32));
 545         dev_priv->ring.size = init->ring_size;
 546         dev_priv->ring.size_l2qw = drm_order(init->ring_size / 8);
 547
 548         dev_priv->ring.tail_mask = (dev_priv->ring.size / sizeof(u32)) - 1;
 549
 550         dev_priv->ring.high_mark = 128;
 551
 552         dev_priv->sarea_priv->last_frame = 0;
 553         R128_WRITE(R128_LAST_FRAME_REG, dev_priv->sarea_priv->last_frame);
 554
 555         dev_priv->sarea_priv->last_dispatch = 0;
 556         R128_WRITE(R128_LAST_DISPATCH_REG, dev_priv->sarea_priv->last_dispatch);
 557
 558 #if __OS_HAS_AGP
 559         if (dev_priv->is_pci) {
 560 #endif
 561                 dev_priv->gart_info.table_mask = DMA_BIT_MASK(32);
 562                 dev_priv->gart_info.gart_table_location = DRM_ATI_GART_MAIN;
 563                 dev_priv->gart_info.table_size = R128_PCIGART_TABLE_SIZE;
 564                 dev_priv->gart_info.addr = NULL;
 565                 dev_priv->gart_info.bus_addr = 0;
 566                 dev_priv->gart_info.gart_reg_if = DRM_ATI_GART_PCI;
 567                 if (!drm_ati_pcigart_init(dev, &dev_priv->gart_info)) {
 568                         DRM_ERROR("failed to init PCI GART!\n");
 569                         dev->dev_private = (void *)dev_priv;
 570                         r128_do_cleanup_cce(dev);
 571                         return -ENOMEM;
 572                 }
 573                 R128_WRITE(R128_PCI_GART_PAGE, dev_priv->gart_info.bus_addr);
 574 #if __OS_HAS_AGP
 575         }
 576 #endif
 577
 578         r128_cce_init_ring_buffer(dev, dev_priv);
 579         r128_cce_load_microcode(dev_priv);
 580
 581         dev->dev_private = (void *)dev_priv;
 582
 583         r128_do_engine_reset(dev);
 584
 585         return 0;
 586 }
 587
 588 int r128_do_cleanup_cce(struct drm_device * dev)
 589 {
 590
 591         /* Make sure interrupts are disabled here because the uninstall ioctl
 592          * may not have been called from userspace and after dev_private
 593          * is freed, it's too late.
 594          */
 595         if (dev->irq_enabled)
 596                 drm_irq_uninstall(dev);
 597
 598         if (dev->dev_private) {
 599                 drm_r128_private_t *dev_priv = dev->dev_private;
 600
 601 #if __OS_HAS_AGP
 602                 if (!dev_priv->is_pci) {
 603                         if (dev_priv->cce_ring != NULL)
 604                                 drm_core_ioremapfree(dev_priv->cce_ring, dev);
 605                         if (dev_priv->ring_rptr != NULL)
 606                                 drm_core_ioremapfree(dev_priv->ring_rptr, dev);
 607                         if (dev->agp_buffer_map != NULL) {
 608                                 drm_core_ioremapfree(dev->agp_buffer_map, dev);
 609                                 dev->agp_buffer_map = NULL;
 610                         }
 611                 } else
 612 #endif
 613                 {
 614                         if (dev_priv->gart_info.bus_addr)
 615                                 if (!drm_ati_pcigart_cleanup(dev,
 616                                                         &dev_priv->gart_info))
 617                                         DRM_ERROR
 618                                             ("failed to cleanup PCI GART!\n");
 619                 }
 620
 621                 drm_free(dev->dev_private, sizeof(drm_r128_private_t),
 622                          DRM_MEM_DRIVER);
 623                 dev->dev_private = NULL;
 624         }
 625
 626         return 0;
 627 }
 628
 629 int r128_cce_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
 630 {
 631         drm_r128_init_t *init = data;
 632
 633         DRM_DEBUG("\n");
 634
 635         LOCK_TEST_WITH_RETURN(dev, file_priv);
 636
 637         switch (init->func) {
 638         case R128_INIT_CCE:
 639                 return r128_do_init_cce(dev, init);
 640         case R128_CLEANUP_CCE:
 641                 return r128_do_cleanup_cce(dev);
 642         }
 643
 644         return -EINVAL;
 645 }
 646
 647 int r128_cce_start(struct drm_device *dev, void *data, struct drm_file *file_priv)
 648 {
 649         drm_r128_private_t *dev_priv = dev->dev_private;
 650         DRM_DEBUG("\n");
 651
 652         LOCK_TEST_WITH_RETURN(dev, file_priv);
 653
 654         if (dev_priv->cce_running || dev_priv->cce_mode == R128_PM4_NONPM4) {
 655                 DRM_DEBUG("while CCE running\n");
 656                 return 0;
 657         }
 658
 659         r128_do_cce_start(dev_priv);
 660
 661         return 0;
 662 }
 663
 664 /* Stop the CCE.  The engine must have been idled before calling this
 665  * routine.
 666  */
 667 int r128_cce_stop(struct drm_device *dev, void *data, struct drm_file *file_priv)
 668 {
 669         drm_r128_private_t *dev_priv = dev->dev_private;
 670         drm_r128_cce_stop_t *stop = data;
 671         int ret;
 672         DRM_DEBUG("\n");
 673
 674         LOCK_TEST_WITH_RETURN(dev, file_priv);
 675
 676         /* Flush any pending CCE commands.  This ensures any outstanding
 677          * commands are exectuted by the engine before we turn it off.
 678          */
 679         if (stop->flush) {
 680                 r128_do_cce_flush(dev_priv);
 681         }
 682
 683         /* If we fail to make the engine go idle, we return an error
 684          * code so that the DRM ioctl wrapper can try again.
 685          */
 686         if (stop->idle) {
 687                 ret = r128_do_cce_idle(dev_priv);
 688                 if (ret)
 689                         return ret;
 690         }
 691
 692         /* Finally, we can turn off the CCE.  If the engine isn't idle,
 693          * we will get some dropped triangles as they won't be fully
 694          * rendered before the CCE is shut down.
 695          */
 696         r128_do_cce_stop(dev_priv);
 697
 698         /* Reset the engine */
 699         r128_do_engine_reset(dev);
 700
 701         return 0;
 702 }
 703
 704 /* Just reset the CCE ring.  Called as part of an X Server engine reset.
 705  */
 706 int r128_cce_reset(struct drm_device *dev, void *data, struct drm_file *file_priv)
 707 {
 708         drm_r128_private_t *dev_priv = dev->dev_private;
 709         DRM_DEBUG("\n");
 710
 711         LOCK_TEST_WITH_RETURN(dev, file_priv);
 712
 713         if (!dev_priv) {
 714                 DRM_DEBUG("called before init done\n");
 715                 return -EINVAL;
 716         }
 717
 718         r128_do_cce_reset(dev_priv);
 719
 720         /* The CCE is no longer running after an engine reset */
 721         dev_priv->cce_running = 0;
 722
 723         return 0;
 724 }
 725
 726 int r128_cce_idle(struct drm_device *dev, void *data, struct drm_file *file_priv)
 727 {
 728         drm_r128_private_t *dev_priv = dev->dev_private;
 729         DRM_DEBUG("\n");
 730
 731         LOCK_TEST_WITH_RETURN(dev, file_priv);
 732
 733         if (dev_priv->cce_running) {
 734                 r128_do_cce_flush(dev_priv);
 735         }
 736
 737         return r128_do_cce_idle(dev_priv);
 738 }
 739
 740 int r128_engine_reset(struct drm_device *dev, void *data, struct drm_file *file_priv)
 741 {
 742         DRM_DEBUG("\n");
 743
 744         LOCK_TEST_WITH_RETURN(dev, file_priv);
 745
 746         return r128_do_engine_reset(dev);
 747 }
 748
 749 int r128_fullscreen(struct drm_device *dev, void *data, struct drm_file *file_priv)
 750 {
 751         return -EINVAL;
 752 }
 753
 754 /* ================================================================
 755  * Freelist management
 756  */
 757 #define R128_BUFFER_USED        0xffffffff
 758 #define R128_BUFFER_FREE        0
 759
 760 #if 0
 761 static int r128_freelist_init(struct drm_device * dev)
 762 {
 763         struct drm_device_dma *dma = dev->dma;
 764         drm_r128_private_t *dev_priv = dev->dev_private;
 765         struct drm_buf *buf;
 766         drm_r128_buf_priv_t *buf_priv;
 767         drm_r128_freelist_t *entry;
 768         int i;
 769
 770         dev_priv->head = drm_alloc(sizeof(drm_r128_freelist_t), DRM_MEM_DRIVER);
 771         if (dev_priv->head == NULL)
 772                 return -ENOMEM;
 773
 774         memset(dev_priv->head, 0, sizeof(drm_r128_freelist_t));
 775         dev_priv->head->age = R128_BUFFER_USED;
 776
 777         for (i = 0; i < dma->buf_count; i++) {
 778                 buf = dma->buflist[i];
 779                 buf_priv = buf->dev_private;
 780
 781                 entry = drm_alloc(sizeof(drm_r128_freelist_t), DRM_MEM_DRIVER);
 782                 if (!entry)
 783                         return -ENOMEM;
 784
 785                 entry->age = R128_BUFFER_FREE;
 786                 entry->buf = buf;
 787                 entry->prev = dev_priv->head;
 788                 entry->next = dev_priv->head->next;
 789                 if (!entry->next)
 790                         dev_priv->tail = entry;
 791
 792                 buf_priv->discard = 0;
 793                 buf_priv->dispatched = 0;
 794                 buf_priv->list_entry = entry;
 795
 796                 dev_priv->head->next = entry;
 797
 798                 if (dev_priv->head->next)
 799                         dev_priv->head->next->prev = entry;
 800         }
 801
 802         return 0;
 803
 804 }
 805 #endif
 806
 807 static struct drm_buf *r128_freelist_get(struct drm_device * dev)
 808 {
 809         struct drm_device_dma *dma = dev->dma;
 810         drm_r128_private_t *dev_priv = dev->dev_private;
 811         drm_r128_buf_priv_t *buf_priv;
 812         struct drm_buf *buf;
 813         int i, t;
 814
 815         /* FIXME: Optimize -- use freelist code */
 816
 817         for (i = 0; i < dma->buf_count; i++) {
 818                 buf = dma->buflist[i];
 819                 buf_priv = buf->dev_private;
 820                 if (buf->file_priv == 0)
 821                         return buf;
 822         }
 823
 824         for (t = 0; t < dev_priv->usec_timeout; t++) {
 825                 u32 done_age = R128_READ(R128_LAST_DISPATCH_REG);
 826
 827                 for (i = 0; i < dma->buf_count; i++) {
 828                         buf = dma->buflist[i];
 829                         buf_priv = buf->dev_private;
 830                         if (buf->pending && buf_priv->age <= done_age) {
 831                                 /* The buffer has been processed, so it
 832                                  * can now be used.
 833                                  */
 834                                 buf->pending = 0;
 835                                 return buf;
 836                         }
 837                 }
 838                 DRM_UDELAY(1);
 839         }
 840
 841         DRM_DEBUG("returning NULL!\n");
 842         return NULL;
 843 }
 844
 845 void r128_freelist_reset(struct drm_device * dev)
 846 {
 847         struct drm_device_dma *dma = dev->dma;
 848         int i;
 849
 850         for (i = 0; i < dma->buf_count; i++) {
 851                 struct drm_buf *buf = dma->buflist[i];
 852                 drm_r128_buf_priv_t *buf_priv = buf->dev_private;
 853                 buf_priv->age = 0;
 854         }
 855 }
 856
 857 /* ================================================================
 858  * CCE command submission
 859  */
 860
 861 int r128_wait_ring(drm_r128_private_t * dev_priv, int n)
 862 {
 863         drm_r128_ring_buffer_t *ring = &dev_priv->ring;
 864         int i;
 865
 866         for (i = 0; i < dev_priv->usec_timeout; i++) {
 867                 r128_update_ring_snapshot(dev_priv);
 868                 if (ring->space >= n)
 869                         return 0;
 870                 DRM_UDELAY(1);
 871         }
 872
 873         /* FIXME: This is being ignored... */
 874         DRM_ERROR("failed!\n");
 875         return -EBUSY;
 876 }
 877
 878 static int r128_cce_get_buffers(struct drm_device * dev,
 879                                 struct drm_file *file_priv,
 880                                 struct drm_dma * d)
 881 {
 882         int i;
 883         struct drm_buf *buf;
 884
 885         for (i = d->granted_count; i < d->request_count; i++) {
 886                 buf = r128_freelist_get(dev);
 887                 if (!buf)
 888                         return -EAGAIN;
 889
 890                 buf->file_priv = file_priv;
 891
 892                 if (DRM_COPY_TO_USER(&d->request_indices[i], &buf->idx,
 893                                      sizeof(buf->idx)))
 894                         return -EFAULT;
 895                 if (DRM_COPY_TO_USER(&d->request_sizes[i], &buf->total,
 896                                      sizeof(buf->total)))
 897                         return -EFAULT;
 898
 899                 d->granted_count++;
 900         }
 901         return 0;
 902 }
 903
 904 int r128_cce_buffers(struct drm_device *dev, void *data, struct drm_file *file_priv)
 905 {
 906         struct drm_device_dma *dma = dev->dma;
 907         int ret = 0;
 908         struct drm_dma *d = data;
 909
 910         LOCK_TEST_WITH_RETURN(dev, file_priv);
 911
 912         /* Please don't send us buffers.
 913          */
 914         if (d->send_count != 0) {
 915                 DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
 916                           DRM_CURRENTPID, d->send_count);
 917                 return -EINVAL;
 918         }
 919
 920         /* We'll send you buffers.
 921          */
 922         if (d->request_count < 0 || d->request_count > dma->buf_count) {
 923                 DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
 924                           DRM_CURRENTPID, d->request_count, dma->buf_count);
 925                 return -EINVAL;
 926         }
 927
 928         d->granted_count = 0;
 929
 930         if (d->request_count) {
 931                 ret = r128_cce_get_buffers(dev, file_priv, d);
 932         }
 933
 934         return ret;
 935 }