drivers/char/drm/i915_dma.c

   1 /* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
   2  */
   3 /**************************************************************************
   4  *
   5  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   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
  10  * "Software"), to deal in the Software without restriction, including
  11  * without limitation the rights to use, copy, modify, merge, publish,
  12  * distribute, sub license, and/or sell copies of the Software, and to
  13  * permit persons to whom the Software is furnished to do so, subject to
  14  * the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the
  17  * next paragraph) shall be included in all copies or substantial portions
  18  * of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  23  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  24  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  *
  28  **************************************************************************/
  29
  30 #include "drmP.h"
  31 #include "drm.h"
  32 #include "i915_drm.h"
  33 #include "i915_drv.h"
  34
  35 /* Really want an OS-independent resettable timer.  Would like to have
  36  * this loop run for (eg) 3 sec, but have the timer reset every time
  37  * the head pointer changes, so that EBUSY only happens if the ring
  38  * actually stalls for (eg) 3 seconds.
  39  */
  40 int i915_wait_ring(drm_device_t * dev, int n, const char *caller)
  41 {
  42         drm_i915_private_t *dev_priv = dev->dev_private;
  43         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  44         u32 last_head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  45         int i;
  46
  47         for (i = 0; i < 10000; i++) {
  48                 ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  49                 ring->space = ring->head - (ring->tail + 8);
  50                 if (ring->space < 0)
  51                         ring->space += ring->Size;
  52                 if (ring->space >= n)
  53                         return 0;
  54
  55                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
  56
  57                 if (ring->head != last_head)
  58                         i = 0;
  59
  60                 last_head = ring->head;
  61         }
  62
  63         return DRM_ERR(EBUSY);
  64 }
  65
  66 void i915_kernel_lost_context(drm_device_t * dev)
  67 {
  68         drm_i915_private_t *dev_priv = dev->dev_private;
  69         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  70
  71         ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  72         ring->tail = I915_READ(LP_RING + RING_TAIL) & TAIL_ADDR;
  73         ring->space = ring->head - (ring->tail + 8);
  74         if (ring->space < 0)
  75                 ring->space += ring->Size;
  76
  77         if (ring->head == ring->tail)
  78                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
  79 }
  80
  81 static int i915_dma_cleanup(drm_device_t * dev)
  82 {
  83         /* Make sure interrupts are disabled here because the uninstall ioctl
  84          * may not have been called from userspace and after dev_private
  85          * is freed, it's too late.
  86          */
  87         if (dev->irq)
  88                 drm_irq_uninstall (dev);
  89
  90         if (dev->dev_private) {
  91                 drm_i915_private_t *dev_priv =
  92                     (drm_i915_private_t *) dev->dev_private;
  93
  94                 if (dev_priv->ring.virtual_start) {
  95                         drm_core_ioremapfree( &dev_priv->ring.map, dev);
  96                 }
  97
  98                 if (dev_priv->hw_status_page) {
  99                         drm_pci_free(dev, PAGE_SIZE, dev_priv->hw_status_page,
 100                                      dev_priv->dma_status_page);
 101                         /* Need to rewrite hardware status page */
 102                         I915_WRITE(0x02080, 0x1ffff000);
 103                 }
 104
 105                 drm_free (dev->dev_private, sizeof(drm_i915_private_t),
 106                            DRM_MEM_DRIVER);
 107
 108                 dev->dev_private = NULL;
 109         }
 110
 111         return 0;
 112 }
 113
 114 static int i915_initialize(drm_device_t * dev,
 115                            drm_i915_private_t * dev_priv,
 116                            drm_i915_init_t * init)
 117 {
 118         memset(dev_priv, 0, sizeof(drm_i915_private_t));
 119
 120         DRM_GETSAREA();
 121         if (!dev_priv->sarea) {
 122                 DRM_ERROR("can not find sarea!\n");
 123                 dev->dev_private = (void *)dev_priv;
 124                 i915_dma_cleanup(dev);
 125                 return DRM_ERR(EINVAL);
 126         }
 127
 128         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 129         if (!dev_priv->mmio_map) {
 130                 dev->dev_private = (void *)dev_priv;
 131                 i915_dma_cleanup(dev);
 132                 DRM_ERROR("can not find mmio map!\n");
 133                 return DRM_ERR(EINVAL);
 134         }
 135
 136         dev_priv->sarea_priv = (drm_i915_sarea_t *)
 137             ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);
 138
 139         dev_priv->ring.Start = init->ring_start;
 140         dev_priv->ring.End = init->ring_end;
 141         dev_priv->ring.Size = init->ring_size;
 142         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 143
 144         dev_priv->ring.map.offset = init->ring_start;
 145         dev_priv->ring.map.size = init->ring_size;
 146         dev_priv->ring.map.type = 0;
 147         dev_priv->ring.map.flags = 0;
 148         dev_priv->ring.map.mtrr = 0;
 149
 150         drm_core_ioremap( &dev_priv->ring.map, dev );
 151
 152         if (dev_priv->ring.map.handle == NULL) {
 153                 dev->dev_private = (void *)dev_priv;
 154                 i915_dma_cleanup(dev);
 155                 DRM_ERROR("can not ioremap virtual address for"
 156                           " ring buffer\n");
 157                 return DRM_ERR(ENOMEM);
 158         }
 159
 160         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 161
 162         dev_priv->back_offset = init->back_offset;
 163         dev_priv->front_offset = init->front_offset;
 164         dev_priv->current_page = 0;
 165         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 166
 167         /* We are using separate values as placeholders for mechanisms for
 168          * private backbuffer/depthbuffer usage.
 169          */
 170         dev_priv->use_mi_batchbuffer_start = 0;
 171
 172         /* Allow hardware batchbuffers unless told otherwise.
 173          */
 174         dev_priv->allow_batchbuffer = 1;
 175
 176         /* Program Hardware Status Page */
 177         dev_priv->hw_status_page = drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE,
 178                                                  0xffffffff,
 179                                                  &dev_priv->dma_status_page);
 180
 181         if (!dev_priv->hw_status_page) {
 182                 dev->dev_private = (void *)dev_priv;
 183                 i915_dma_cleanup(dev);
 184                 DRM_ERROR("Can not allocate hardware status page\n");
 185                 return DRM_ERR(ENOMEM);
 186         }
 187         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 188         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 189
 190         I915_WRITE(0x02080, dev_priv->dma_status_page);
 191         DRM_DEBUG("Enabled hardware status page\n");
 192
 193         dev->dev_private = (void *)dev_priv;
 194
 195         return 0;
 196 }
 197
 198 static int i915_resume(drm_device_t * dev)
 199 {
 200         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 201
 202         DRM_DEBUG("%s\n", __FUNCTION__);
 203
 204         if (!dev_priv->sarea) {
 205                 DRM_ERROR("can not find sarea!\n");
 206                 return DRM_ERR(EINVAL);
 207         }
 208
 209         if (!dev_priv->mmio_map) {
 210                 DRM_ERROR("can not find mmio map!\n");
 211                 return DRM_ERR(EINVAL);
 212         }
 213
 214         if (dev_priv->ring.map.handle == NULL) {
 215                 DRM_ERROR("can not ioremap virtual address for"
 216                           " ring buffer\n");
 217                 return DRM_ERR(ENOMEM);
 218         }
 219
 220         /* Program Hardware Status Page */
 221         if (!dev_priv->hw_status_page) {
 222                 DRM_ERROR("Can not find hardware status page\n");
 223                 return DRM_ERR(EINVAL);
 224         }
 225         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 226
 227         I915_WRITE(0x02080, dev_priv->dma_status_page);
 228         DRM_DEBUG("Enabled hardware status page\n");
 229
 230         return 0;
 231 }
 232
 233 static int i915_dma_init(DRM_IOCTL_ARGS)
 234 {
 235         DRM_DEVICE;
 236         drm_i915_private_t *dev_priv;
 237         drm_i915_init_t init;
 238         int retcode = 0;
 239
 240         DRM_COPY_FROM_USER_IOCTL(init, (drm_i915_init_t __user *) data,
 241                                  sizeof(init));
 242
 243         switch (init.func) {
 244         case I915_INIT_DMA:
 245                 dev_priv = drm_alloc (sizeof(drm_i915_private_t),
 246                                        DRM_MEM_DRIVER);
 247                 if (dev_priv == NULL)
 248                         return DRM_ERR(ENOMEM);
 249                 retcode = i915_initialize(dev, dev_priv, &init);
 250                 break;
 251         case I915_CLEANUP_DMA:
 252                 retcode = i915_dma_cleanup(dev);
 253                 break;
 254         case I915_RESUME_DMA:
 255                 retcode = i915_resume(dev);
 256                 break;
 257         default:
 258                 retcode = -EINVAL;
 259                 break;
 260         }
 261
 262         return retcode;
 263 }
 264
 265 /* Implement basically the same security restrictions as hardware does
 266  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 267  *
 268  * Most of the calculations below involve calculating the size of a
 269  * particular instruction.  It's important to get the size right as
 270  * that tells us where the next instruction to check is.  Any illegal
 271  * instruction detected will be given a size of zero, which is a
 272  * signal to abort the rest of the buffer.
 273  */
 274 static int do_validate_cmd(int cmd)
 275 {
 276         switch (((cmd >> 29) & 0x7)) {
 277         case 0x0:
 278                 switch ((cmd >> 23) & 0x3f) {
 279                 case 0x0:
 280                         return 1;       /* MI_NOOP */
 281                 case 0x4:
 282                         return 1;       /* MI_FLUSH */
 283                 default:
 284                         return 0;       /* disallow everything else */
 285                 }
 286                 break;
 287         case 0x1:
 288                 return 0;       /* reserved */
 289         case 0x2:
 290                 return (cmd & 0xff) + 2;        /* 2d commands */
 291         case 0x3:
 292                 if (((cmd >> 24) & 0x1f) <= 0x18)
 293                         return 1;
 294
 295                 switch ((cmd >> 24) & 0x1f) {
 296                 case 0x1c:
 297                         return 1;
 298                 case 0x1d:
 299                         switch ((cmd>>16)&0xff) {
 300                         case 0x3:
 301                                 return (cmd & 0x1f) + 2;
 302                         case 0x4:
 303                                 return (cmd & 0xf) + 2;
 304                         default:
 305                                 return (cmd & 0xffff) + 2;
 306                         }
 307                 case 0x1e:
 308                         if (cmd & (1 << 23))
 309                                 return (cmd & 0xffff) + 1;
 310                         else
 311                                 return 1;
 312                 case 0x1f:
 313                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 314                                 return (cmd & 0x1ffff) + 2;
 315                         else if (cmd & (1 << 17))       /* indirect random */
 316                                 if ((cmd & 0xffff) == 0)
 317                                         return 0;       /* unknown length, too hard */
 318                                 else
 319                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 320                         else
 321                                 return 2;       /* indirect sequential */
 322                 default:
 323                         return 0;
 324                 }
 325         default:
 326                 return 0;
 327         }
 328
 329         return 0;
 330 }
 331
 332 static int validate_cmd(int cmd)
 333 {
 334         int ret = do_validate_cmd(cmd);
 335
 336 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 337
 338         return ret;
 339 }
 340
 341 static int i915_emit_cmds(drm_device_t * dev, int __user * buffer, int dwords)
 342 {
 343         drm_i915_private_t *dev_priv = dev->dev_private;
 344         int i;
 345         RING_LOCALS;
 346
 347         for (i = 0; i < dwords;) {
 348                 int cmd, sz;
 349
 350                 if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i], sizeof(cmd)))
 351                         return DRM_ERR(EINVAL);
 352
 353 /*              printk("%d/%d ", i, dwords); */
 354
 355                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 356                         return DRM_ERR(EINVAL);
 357
 358                 BEGIN_LP_RING(sz);
 359                 OUT_RING(cmd);
 360
 361                 while (++i, --sz) {
 362                         if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i],
 363                                                          sizeof(cmd))) {
 364                                 return DRM_ERR(EINVAL);
 365                         }
 366                         OUT_RING(cmd);
 367                 }
 368                 ADVANCE_LP_RING();
 369         }
 370
 371         return 0;
 372 }
 373
 374 static int i915_emit_box(drm_device_t * dev,
 375                          drm_clip_rect_t __user * boxes,
 376                          int i, int DR1, int DR4)
 377 {
 378         drm_i915_private_t *dev_priv = dev->dev_private;
 379         drm_clip_rect_t box;
 380         RING_LOCALS;
 381
 382         if (DRM_COPY_FROM_USER_UNCHECKED(&box, &boxes[i], sizeof(box))) {
 383                 return EFAULT;
 384         }
 385
 386         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 387                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 388                           box.x1, box.y1, box.x2, box.y2);
 389                 return DRM_ERR(EINVAL);
 390         }
 391
 392         BEGIN_LP_RING(6);
 393         OUT_RING(GFX_OP_DRAWRECT_INFO);
 394         OUT_RING(DR1);
 395         OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 396         OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 397         OUT_RING(DR4);
 398         OUT_RING(0);
 399         ADVANCE_LP_RING();
 400
 401         return 0;
 402 }
 403
 404 static int i915_dispatch_cmdbuffer(drm_device_t * dev,
 405                                    drm_i915_cmdbuffer_t * cmd)
 406 {
 407         int nbox = cmd->num_cliprects;
 408         int i = 0, count, ret;
 409
 410         if (cmd->sz & 0x3) {
 411                 DRM_ERROR("alignment");
 412                 return DRM_ERR(EINVAL);
 413         }
 414
 415         i915_kernel_lost_context(dev);
 416
 417         count = nbox ? nbox : 1;
 418
 419         for (i = 0; i < count; i++) {
 420                 if (i < nbox) {
 421                         ret = i915_emit_box(dev, cmd->cliprects, i,
 422                                             cmd->DR1, cmd->DR4);
 423                         if (ret)
 424                                 return ret;
 425                 }
 426
 427                 ret = i915_emit_cmds(dev, (int __user *)cmd->buf, cmd->sz / 4);
 428                 if (ret)
 429                         return ret;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static int i915_dispatch_batchbuffer(drm_device_t * dev,
 436                                      drm_i915_batchbuffer_t * batch)
 437 {
 438         drm_i915_private_t *dev_priv = dev->dev_private;
 439         drm_clip_rect_t __user *boxes = batch->cliprects;
 440         int nbox = batch->num_cliprects;
 441         int i = 0, count;
 442         RING_LOCALS;
 443
 444         if ((batch->start | batch->used) & 0x7) {
 445                 DRM_ERROR("alignment");
 446                 return DRM_ERR(EINVAL);
 447         }
 448
 449         i915_kernel_lost_context(dev);
 450
 451         count = nbox ? nbox : 1;
 452
 453         for (i = 0; i < count; i++) {
 454                 if (i < nbox) {
 455                         int ret = i915_emit_box(dev, boxes, i,
 456                                                 batch->DR1, batch->DR4);
 457                         if (ret)
 458                                 return ret;
 459                 }
 460
 461                 if (dev_priv->use_mi_batchbuffer_start) {
 462                         BEGIN_LP_RING(2);
 463                         OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 464                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 465                         ADVANCE_LP_RING();
 466                 } else {
 467                         BEGIN_LP_RING(4);
 468                         OUT_RING(MI_BATCH_BUFFER);
 469                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 470                         OUT_RING(batch->start + batch->used - 4);
 471                         OUT_RING(0);
 472                         ADVANCE_LP_RING();
 473                 }
 474         }
 475
 476         dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 477
 478         BEGIN_LP_RING(4);
 479         OUT_RING(CMD_STORE_DWORD_IDX);
 480         OUT_RING(20);
 481         OUT_RING(dev_priv->counter);
 482         OUT_RING(0);
 483         ADVANCE_LP_RING();
 484
 485         return 0;
 486 }
 487
 488 static int i915_dispatch_flip(drm_device_t * dev)
 489 {
 490         drm_i915_private_t *dev_priv = dev->dev_private;
 491         RING_LOCALS;
 492
 493         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
 494                   __FUNCTION__,
 495                   dev_priv->current_page,
 496                   dev_priv->sarea_priv->pf_current_page);
 497
 498         i915_kernel_lost_context(dev);
 499
 500         BEGIN_LP_RING(2);
 501         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 502         OUT_RING(0);
 503         ADVANCE_LP_RING();
 504
 505         BEGIN_LP_RING(6);
 506         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 507         OUT_RING(0);
 508         if (dev_priv->current_page == 0) {
 509                 OUT_RING(dev_priv->back_offset);
 510                 dev_priv->current_page = 1;
 511         } else {
 512                 OUT_RING(dev_priv->front_offset);
 513                 dev_priv->current_page = 0;
 514         }
 515         OUT_RING(0);
 516         ADVANCE_LP_RING();
 517
 518         BEGIN_LP_RING(2);
 519         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 520         OUT_RING(0);
 521         ADVANCE_LP_RING();
 522
 523         dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 524
 525         BEGIN_LP_RING(4);
 526         OUT_RING(CMD_STORE_DWORD_IDX);
 527         OUT_RING(20);
 528         OUT_RING(dev_priv->counter);
 529         OUT_RING(0);
 530         ADVANCE_LP_RING();
 531
 532         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 533         return 0;
 534 }
 535
 536 static int i915_quiescent(drm_device_t * dev)
 537 {
 538         drm_i915_private_t *dev_priv = dev->dev_private;
 539
 540         i915_kernel_lost_context(dev);
 541         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __FUNCTION__);
 542 }
 543
 544 static int i915_flush_ioctl(DRM_IOCTL_ARGS)
 545 {
 546         DRM_DEVICE;
 547
 548         LOCK_TEST_WITH_RETURN(dev, filp);
 549
 550         return i915_quiescent(dev);
 551 }
 552
 553 static int i915_batchbuffer(DRM_IOCTL_ARGS)
 554 {
 555         DRM_DEVICE;
 556         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 557         u32 *hw_status = dev_priv->hw_status_page;
 558         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 559             dev_priv->sarea_priv;
 560         drm_i915_batchbuffer_t batch;
 561         int ret;
 562
 563         if (!dev_priv->allow_batchbuffer) {
 564                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 565                 return DRM_ERR(EINVAL);
 566         }
 567
 568         DRM_COPY_FROM_USER_IOCTL(batch, (drm_i915_batchbuffer_t __user *) data,
 569                                  sizeof(batch));
 570
 571         DRM_DEBUG("i915 batchbuffer, start %x used %d cliprects %d\n",
 572                   batch.start, batch.used, batch.num_cliprects);
 573
 574         LOCK_TEST_WITH_RETURN(dev, filp);
 575
 576         if (batch.num_cliprects && DRM_VERIFYAREA_READ(batch.cliprects,
 577                                                        batch.num_cliprects *
 578                                                        sizeof(drm_clip_rect_t)))
 579                 return DRM_ERR(EFAULT);
 580
 581         ret = i915_dispatch_batchbuffer(dev, &batch);
 582
 583         sarea_priv->last_dispatch = (int)hw_status[5];
 584         return ret;
 585 }
 586
 587 static int i915_cmdbuffer(DRM_IOCTL_ARGS)
 588 {
 589         DRM_DEVICE;
 590         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 591         u32 *hw_status = dev_priv->hw_status_page;
 592         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 593             dev_priv->sarea_priv;
 594         drm_i915_cmdbuffer_t cmdbuf;
 595         int ret;
 596
 597         DRM_COPY_FROM_USER_IOCTL(cmdbuf, (drm_i915_cmdbuffer_t __user *) data,
 598                                  sizeof(cmdbuf));
 599
 600         DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 601                   cmdbuf.buf, cmdbuf.sz, cmdbuf.num_cliprects);
 602
 603         LOCK_TEST_WITH_RETURN(dev, filp);
 604
 605         if (cmdbuf.num_cliprects &&
 606             DRM_VERIFYAREA_READ(cmdbuf.cliprects,
 607                                 cmdbuf.num_cliprects *
 608                                 sizeof(drm_clip_rect_t))) {
 609                 DRM_ERROR("Fault accessing cliprects\n");
 610                 return DRM_ERR(EFAULT);
 611         }
 612
 613         ret = i915_dispatch_cmdbuffer(dev, &cmdbuf);
 614         if (ret) {
 615                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 616                 return ret;
 617         }
 618
 619         sarea_priv->last_dispatch = (int)hw_status[5];
 620         return 0;
 621 }
 622
 623 static int i915_flip_bufs(DRM_IOCTL_ARGS)
 624 {
 625         DRM_DEVICE;
 626
 627         DRM_DEBUG("%s\n", __FUNCTION__);
 628
 629         LOCK_TEST_WITH_RETURN(dev, filp);
 630
 631         return i915_dispatch_flip(dev);
 632 }
 633
 634 static int i915_getparam(DRM_IOCTL_ARGS)
 635 {
 636         DRM_DEVICE;
 637         drm_i915_private_t *dev_priv = dev->dev_private;
 638         drm_i915_getparam_t param;
 639         int value;
 640
 641         if (!dev_priv) {
 642                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
 643                 return DRM_ERR(EINVAL);
 644         }
 645
 646         DRM_COPY_FROM_USER_IOCTL(param, (drm_i915_getparam_t __user *) data,
 647                                  sizeof(param));
 648
 649         switch (param.param) {
 650         case I915_PARAM_IRQ_ACTIVE:
 651                 value = dev->irq ? 1 : 0;
 652                 break;
 653         case I915_PARAM_ALLOW_BATCHBUFFER:
 654                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 655                 break;
 656         default:
 657                 DRM_ERROR("Unkown parameter %d\n", param.param);
 658                 return DRM_ERR(EINVAL);
 659         }
 660
 661         if (DRM_COPY_TO_USER(param.value, &value, sizeof(int))) {
 662                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 663                 return DRM_ERR(EFAULT);
 664         }
 665
 666         return 0;
 667 }
 668
 669 static int i915_setparam(DRM_IOCTL_ARGS)
 670 {
 671         DRM_DEVICE;
 672         drm_i915_private_t *dev_priv = dev->dev_private;
 673         drm_i915_setparam_t param;
 674
 675         if (!dev_priv) {
 676                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
 677                 return DRM_ERR(EINVAL);
 678         }
 679
 680         DRM_COPY_FROM_USER_IOCTL(param, (drm_i915_setparam_t __user *) data,
 681                                  sizeof(param));
 682
 683         switch (param.param) {
 684         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 685                 dev_priv->use_mi_batchbuffer_start = param.value;
 686                 break;
 687         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 688                 dev_priv->tex_lru_log_granularity = param.value;
 689                 break;
 690         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 691                 dev_priv->allow_batchbuffer = param.value;
 692                 break;
 693         default:
 694                 DRM_ERROR("unknown parameter %d\n", param.param);
 695                 return DRM_ERR(EINVAL);
 696         }
 697
 698         return 0;
 699 }
 700
 701 void i915_driver_pretakedown(drm_device_t *dev)
 702 {
 703         if ( dev->dev_private ) {
 704                 drm_i915_private_t *dev_priv = dev->dev_private;
 705                 i915_mem_takedown( &(dev_priv->agp_heap) );
 706         }
 707         i915_dma_cleanup( dev );
 708 }
 709
 710 void i915_driver_prerelease(drm_device_t *dev, DRMFILE filp)
 711 {
 712         if ( dev->dev_private ) {
 713                 drm_i915_private_t *dev_priv = dev->dev_private;
 714                 i915_mem_release( dev, filp, dev_priv->agp_heap );
 715         }
 716 }
 717
 718 drm_ioctl_desc_t i915_ioctls[] = {
 719         [DRM_IOCTL_NR(DRM_I915_INIT)] = {i915_dma_init, 1, 1},
 720         [DRM_IOCTL_NR(DRM_I915_FLUSH)] = {i915_flush_ioctl, 1, 0},
 721         [DRM_IOCTL_NR(DRM_I915_FLIP)] = {i915_flip_bufs, 1, 0},
 722         [DRM_IOCTL_NR(DRM_I915_BATCHBUFFER)] = {i915_batchbuffer, 1, 0},
 723         [DRM_IOCTL_NR(DRM_I915_IRQ_EMIT)] = {i915_irq_emit, 1, 0},
 724         [DRM_IOCTL_NR(DRM_I915_IRQ_WAIT)] = {i915_irq_wait, 1, 0},
 725         [DRM_IOCTL_NR(DRM_I915_GETPARAM)] = {i915_getparam, 1, 0},
 726         [DRM_IOCTL_NR(DRM_I915_SETPARAM)] = {i915_setparam, 1, 1},
 727         [DRM_IOCTL_NR(DRM_I915_ALLOC)] = {i915_mem_alloc, 1, 0},
 728         [DRM_IOCTL_NR(DRM_I915_FREE)] = {i915_mem_free, 1, 0},
 729         [DRM_IOCTL_NR(DRM_I915_INIT_HEAP)] = {i915_mem_init_heap, 1, 1},
 730         [DRM_IOCTL_NR(DRM_I915_CMDBUFFER)] = {i915_cmdbuffer, 1, 0}
 731 };
 732
 733 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);