drivers/char/drm/i915_dma.c

   1 /* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
   2  */
   3 /*
   4  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  */
  28
  29 #include "drmP.h"
  30 #include "drm.h"
  31 #include "i915_drm.h"
  32 #include "i915_drv.h"
  33
  34 /* Really want an OS-independent resettable timer.  Would like to have
  35  * this loop run for (eg) 3 sec, but have the timer reset every time
  36  * the head pointer changes, so that EBUSY only happens if the ring
  37  * actually stalls for (eg) 3 seconds.
  38  */
  39 int i915_wait_ring(drm_device_t * dev, int n, const char *caller)
  40 {
  41         drm_i915_private_t *dev_priv = dev->dev_private;
  42         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  43         u32 last_head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  44         int i;
  45
  46         for (i = 0; i < 10000; i++) {
  47                 ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  48                 ring->space = ring->head - (ring->tail + 8);
  49                 if (ring->space < 0)
  50                         ring->space += ring->Size;
  51                 if (ring->space >= n)
  52                         return 0;
  53
  54                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
  55
  56                 if (ring->head != last_head)
  57                         i = 0;
  58
  59                 last_head = ring->head;
  60         }
  61
  62         return DRM_ERR(EBUSY);
  63 }
  64
  65 void i915_kernel_lost_context(drm_device_t * dev)
  66 {
  67         drm_i915_private_t *dev_priv = dev->dev_private;
  68         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  69
  70         ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  71         ring->tail = I915_READ(LP_RING + RING_TAIL) & TAIL_ADDR;
  72         ring->space = ring->head - (ring->tail + 8);
  73         if (ring->space < 0)
  74                 ring->space += ring->Size;
  75
  76         if (ring->head == ring->tail)
  77                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
  78 }
  79
  80 static int i915_dma_cleanup(drm_device_t * dev)
  81 {
  82         /* Make sure interrupts are disabled here because the uninstall ioctl
  83          * may not have been called from userspace and after dev_private
  84          * is freed, it's too late.
  85          */
  86         if (dev->irq)
  87                 drm_irq_uninstall(dev);
  88
  89         if (dev->dev_private) {
  90                 drm_i915_private_t *dev_priv =
  91                     (drm_i915_private_t *) dev->dev_private;
  92
  93                 if (dev_priv->ring.virtual_start) {
  94                         drm_core_ioremapfree(&dev_priv->ring.map, dev);
  95                 }
  96
  97                 if (dev_priv->status_page_dmah) {
  98                         drm_pci_free(dev, dev_priv->status_page_dmah);
  99                         /* Need to rewrite hardware status page */
 100                         I915_WRITE(0x02080, 0x1ffff000);
 101                 }
 102
 103                 drm_free(dev->dev_private, sizeof(drm_i915_private_t),
 104                          DRM_MEM_DRIVER);
 105
 106                 dev->dev_private = NULL;
 107         }
 108
 109         return 0;
 110 }
 111
 112 static int i915_initialize(drm_device_t * dev,
 113                            drm_i915_private_t * dev_priv,
 114                            drm_i915_init_t * init)
 115 {
 116         memset(dev_priv, 0, sizeof(drm_i915_private_t));
 117
 118         DRM_GETSAREA();
 119         if (!dev_priv->sarea) {
 120                 DRM_ERROR("can not find sarea!\n");
 121                 dev->dev_private = (void *)dev_priv;
 122                 i915_dma_cleanup(dev);
 123                 return DRM_ERR(EINVAL);
 124         }
 125
 126         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 127         if (!dev_priv->mmio_map) {
 128                 dev->dev_private = (void *)dev_priv;
 129                 i915_dma_cleanup(dev);
 130                 DRM_ERROR("can not find mmio map!\n");
 131                 return DRM_ERR(EINVAL);
 132         }
 133
 134         dev_priv->sarea_priv = (drm_i915_sarea_t *)
 135             ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);
 136
 137         dev_priv->ring.Start = init->ring_start;
 138         dev_priv->ring.End = init->ring_end;
 139         dev_priv->ring.Size = init->ring_size;
 140         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 141
 142         dev_priv->ring.map.offset = init->ring_start;
 143         dev_priv->ring.map.size = init->ring_size;
 144         dev_priv->ring.map.type = 0;
 145         dev_priv->ring.map.flags = 0;
 146         dev_priv->ring.map.mtrr = 0;
 147
 148         drm_core_ioremap(&dev_priv->ring.map, dev);
 149
 150         if (dev_priv->ring.map.handle == NULL) {
 151                 dev->dev_private = (void *)dev_priv;
 152                 i915_dma_cleanup(dev);
 153                 DRM_ERROR("can not ioremap virtual address for"
 154                           " ring buffer\n");
 155                 return DRM_ERR(ENOMEM);
 156         }
 157
 158         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 159
 160         dev_priv->back_offset = init->back_offset;
 161         dev_priv->front_offset = init->front_offset;
 162         dev_priv->current_page = 0;
 163         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 164
 165         /* We are using separate values as placeholders for mechanisms for
 166          * private backbuffer/depthbuffer usage.
 167          */
 168         dev_priv->use_mi_batchbuffer_start = 0;
 169
 170         /* Allow hardware batchbuffers unless told otherwise.
 171          */
 172         dev_priv->allow_batchbuffer = 1;
 173
 174         /* Program Hardware Status Page */
 175         dev_priv->status_page_dmah = drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE,
 176                                                    0xffffffff);
 177
 178         if (!dev_priv->status_page_dmah) {
 179                 dev->dev_private = (void *)dev_priv;
 180                 i915_dma_cleanup(dev);
 181                 DRM_ERROR("Can not allocate hardware status page\n");
 182                 return DRM_ERR(ENOMEM);
 183         }
 184         dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
 185         dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
 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_dma_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_dma_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         if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
 348                 return DRM_ERR(EINVAL);
 349
 350         BEGIN_LP_RING(((dwords+1)&~1));
 351
 352         for (i = 0; i < dwords;) {
 353                 int cmd, sz;
 354
 355                 if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i], sizeof(cmd)))
 356                         return DRM_ERR(EINVAL);
 357
 358                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 359                         return DRM_ERR(EINVAL);
 360
 361                 OUT_RING(cmd);
 362
 363                 while (++i, --sz) {
 364                         if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i],
 365                                                          sizeof(cmd))) {
 366                                 return DRM_ERR(EINVAL);
 367                         }
 368                         OUT_RING(cmd);
 369                 }
 370         }
 371
 372         if (dwords & 1)
 373                 OUT_RING(0);
 374
 375         ADVANCE_LP_RING();
 376
 377         return 0;
 378 }
 379
 380 static int i915_emit_box(drm_device_t * dev,
 381                          drm_clip_rect_t __user * boxes,
 382                          int i, int DR1, int DR4)
 383 {
 384         drm_i915_private_t *dev_priv = dev->dev_private;
 385         drm_clip_rect_t box;
 386         RING_LOCALS;
 387
 388         if (DRM_COPY_FROM_USER_UNCHECKED(&box, &boxes[i], sizeof(box))) {
 389                 return EFAULT;
 390         }
 391
 392         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 393                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 394                           box.x1, box.y1, box.x2, box.y2);
 395                 return DRM_ERR(EINVAL);
 396         }
 397
 398         BEGIN_LP_RING(6);
 399         OUT_RING(GFX_OP_DRAWRECT_INFO);
 400         OUT_RING(DR1);
 401         OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 402         OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 403         OUT_RING(DR4);
 404         OUT_RING(0);
 405         ADVANCE_LP_RING();
 406
 407         return 0;
 408 }
 409
 410 static void i915_emit_breadcrumb(drm_device_t *dev)
 411 {
 412         drm_i915_private_t *dev_priv = dev->dev_private;
 413         RING_LOCALS;
 414
 415         dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 416
 417         BEGIN_LP_RING(4);
 418         OUT_RING(CMD_STORE_DWORD_IDX);
 419         OUT_RING(20);
 420         OUT_RING(dev_priv->counter);
 421         OUT_RING(0);
 422         ADVANCE_LP_RING();
 423 }
 424
 425 static int i915_dispatch_cmdbuffer(drm_device_t * dev,
 426                                    drm_i915_cmdbuffer_t * cmd)
 427 {
 428         int nbox = cmd->num_cliprects;
 429         int i = 0, count, ret;
 430
 431         if (cmd->sz & 0x3) {
 432                 DRM_ERROR("alignment");
 433                 return DRM_ERR(EINVAL);
 434         }
 435
 436         i915_kernel_lost_context(dev);
 437
 438         count = nbox ? nbox : 1;
 439
 440         for (i = 0; i < count; i++) {
 441                 if (i < nbox) {
 442                         ret = i915_emit_box(dev, cmd->cliprects, i,
 443                                             cmd->DR1, cmd->DR4);
 444                         if (ret)
 445                                 return ret;
 446                 }
 447
 448                 ret = i915_emit_cmds(dev, (int __user *)cmd->buf, cmd->sz / 4);
 449                 if (ret)
 450                         return ret;
 451         }
 452
 453         i915_emit_breadcrumb(dev);
 454         return 0;
 455 }
 456
 457 static int i915_dispatch_batchbuffer(drm_device_t * dev,
 458                                      drm_i915_batchbuffer_t * batch)
 459 {
 460         drm_i915_private_t *dev_priv = dev->dev_private;
 461         drm_clip_rect_t __user *boxes = batch->cliprects;
 462         int nbox = batch->num_cliprects;
 463         int i = 0, count;
 464         RING_LOCALS;
 465
 466         if ((batch->start | batch->used) & 0x7) {
 467                 DRM_ERROR("alignment");
 468                 return DRM_ERR(EINVAL);
 469         }
 470
 471         i915_kernel_lost_context(dev);
 472
 473         count = nbox ? nbox : 1;
 474
 475         for (i = 0; i < count; i++) {
 476                 if (i < nbox) {
 477                         int ret = i915_emit_box(dev, boxes, i,
 478                                                 batch->DR1, batch->DR4);
 479                         if (ret)
 480                                 return ret;
 481                 }
 482
 483                 if (dev_priv->use_mi_batchbuffer_start) {
 484                         BEGIN_LP_RING(2);
 485                         OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 486                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 487                         ADVANCE_LP_RING();
 488                 } else {
 489                         BEGIN_LP_RING(4);
 490                         OUT_RING(MI_BATCH_BUFFER);
 491                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 492                         OUT_RING(batch->start + batch->used - 4);
 493                         OUT_RING(0);
 494                         ADVANCE_LP_RING();
 495                 }
 496         }
 497
 498         dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 499
 500         i915_emit_breadcrumb(dev);
 501
 502         return 0;
 503 }
 504
 505 static int i915_dispatch_flip(drm_device_t * dev)
 506 {
 507         drm_i915_private_t *dev_priv = dev->dev_private;
 508         RING_LOCALS;
 509
 510         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
 511                   __FUNCTION__,
 512                   dev_priv->current_page,
 513                   dev_priv->sarea_priv->pf_current_page);
 514
 515         i915_kernel_lost_context(dev);
 516
 517         BEGIN_LP_RING(2);
 518         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 519         OUT_RING(0);
 520         ADVANCE_LP_RING();
 521
 522         BEGIN_LP_RING(6);
 523         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 524         OUT_RING(0);
 525         if (dev_priv->current_page == 0) {
 526                 OUT_RING(dev_priv->back_offset);
 527                 dev_priv->current_page = 1;
 528         } else {
 529                 OUT_RING(dev_priv->front_offset);
 530                 dev_priv->current_page = 0;
 531         }
 532         OUT_RING(0);
 533         ADVANCE_LP_RING();
 534
 535         BEGIN_LP_RING(2);
 536         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 537         OUT_RING(0);
 538         ADVANCE_LP_RING();
 539
 540         dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 541
 542         BEGIN_LP_RING(4);
 543         OUT_RING(CMD_STORE_DWORD_IDX);
 544         OUT_RING(20);
 545         OUT_RING(dev_priv->counter);
 546         OUT_RING(0);
 547         ADVANCE_LP_RING();
 548
 549         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 550         return 0;
 551 }
 552
 553 static int i915_quiescent(drm_device_t * dev)
 554 {
 555         drm_i915_private_t *dev_priv = dev->dev_private;
 556
 557         i915_kernel_lost_context(dev);
 558         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __FUNCTION__);
 559 }
 560
 561 static int i915_flush_ioctl(DRM_IOCTL_ARGS)
 562 {
 563         DRM_DEVICE;
 564
 565         LOCK_TEST_WITH_RETURN(dev, filp);
 566
 567         return i915_quiescent(dev);
 568 }
 569
 570 static int i915_batchbuffer(DRM_IOCTL_ARGS)
 571 {
 572         DRM_DEVICE;
 573         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 574         u32 *hw_status = dev_priv->hw_status_page;
 575         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 576             dev_priv->sarea_priv;
 577         drm_i915_batchbuffer_t batch;
 578         int ret;
 579
 580         if (!dev_priv->allow_batchbuffer) {
 581                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 582                 return DRM_ERR(EINVAL);
 583         }
 584
 585         DRM_COPY_FROM_USER_IOCTL(batch, (drm_i915_batchbuffer_t __user *) data,
 586                                  sizeof(batch));
 587
 588         DRM_DEBUG("i915 batchbuffer, start %x used %d cliprects %d\n",
 589                   batch.start, batch.used, batch.num_cliprects);
 590
 591         LOCK_TEST_WITH_RETURN(dev, filp);
 592
 593         if (batch.num_cliprects && DRM_VERIFYAREA_READ(batch.cliprects,
 594                                                        batch.num_cliprects *
 595                                                        sizeof(drm_clip_rect_t)))
 596                 return DRM_ERR(EFAULT);
 597
 598         ret = i915_dispatch_batchbuffer(dev, &batch);
 599
 600         sarea_priv->last_dispatch = (int)hw_status[5];
 601         return ret;
 602 }
 603
 604 static int i915_cmdbuffer(DRM_IOCTL_ARGS)
 605 {
 606         DRM_DEVICE;
 607         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 608         u32 *hw_status = dev_priv->hw_status_page;
 609         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 610             dev_priv->sarea_priv;
 611         drm_i915_cmdbuffer_t cmdbuf;
 612         int ret;
 613
 614         DRM_COPY_FROM_USER_IOCTL(cmdbuf, (drm_i915_cmdbuffer_t __user *) data,
 615                                  sizeof(cmdbuf));
 616
 617         DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 618                   cmdbuf.buf, cmdbuf.sz, cmdbuf.num_cliprects);
 619
 620         LOCK_TEST_WITH_RETURN(dev, filp);
 621
 622         if (cmdbuf.num_cliprects &&
 623             DRM_VERIFYAREA_READ(cmdbuf.cliprects,
 624                                 cmdbuf.num_cliprects *
 625                                 sizeof(drm_clip_rect_t))) {
 626                 DRM_ERROR("Fault accessing cliprects\n");
 627                 return DRM_ERR(EFAULT);
 628         }
 629
 630         ret = i915_dispatch_cmdbuffer(dev, &cmdbuf);
 631         if (ret) {
 632                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 633                 return ret;
 634         }
 635
 636         sarea_priv->last_dispatch = (int)hw_status[5];
 637         return 0;
 638 }
 639
 640 static int i915_flip_bufs(DRM_IOCTL_ARGS)
 641 {
 642         DRM_DEVICE;
 643
 644         DRM_DEBUG("%s\n", __FUNCTION__);
 645
 646         LOCK_TEST_WITH_RETURN(dev, filp);
 647
 648         return i915_dispatch_flip(dev);
 649 }
 650
 651 static int i915_getparam(DRM_IOCTL_ARGS)
 652 {
 653         DRM_DEVICE;
 654         drm_i915_private_t *dev_priv = dev->dev_private;
 655         drm_i915_getparam_t param;
 656         int value;
 657
 658         if (!dev_priv) {
 659                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
 660                 return DRM_ERR(EINVAL);
 661         }
 662
 663         DRM_COPY_FROM_USER_IOCTL(param, (drm_i915_getparam_t __user *) data,
 664                                  sizeof(param));
 665
 666         switch (param.param) {
 667         case I915_PARAM_IRQ_ACTIVE:
 668                 value = dev->irq ? 1 : 0;
 669                 break;
 670         case I915_PARAM_ALLOW_BATCHBUFFER:
 671                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 672                 break;
 673         case I915_PARAM_LAST_DISPATCH:
 674                 value = READ_BREADCRUMB(dev_priv);
 675                 break;
 676         default:
 677                 DRM_ERROR("Unknown parameter %d\n", param.param);
 678                 return DRM_ERR(EINVAL);
 679         }
 680
 681         if (DRM_COPY_TO_USER(param.value, &value, sizeof(int))) {
 682                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 683                 return DRM_ERR(EFAULT);
 684         }
 685
 686         return 0;
 687 }
 688
 689 static int i915_setparam(DRM_IOCTL_ARGS)
 690 {
 691         DRM_DEVICE;
 692         drm_i915_private_t *dev_priv = dev->dev_private;
 693         drm_i915_setparam_t param;
 694
 695         if (!dev_priv) {
 696                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
 697                 return DRM_ERR(EINVAL);
 698         }
 699
 700         DRM_COPY_FROM_USER_IOCTL(param, (drm_i915_setparam_t __user *) data,
 701                                  sizeof(param));
 702
 703         switch (param.param) {
 704         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 705                 dev_priv->use_mi_batchbuffer_start = param.value;
 706                 break;
 707         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 708                 dev_priv->tex_lru_log_granularity = param.value;
 709                 break;
 710         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 711                 dev_priv->allow_batchbuffer = param.value;
 712                 break;
 713         default:
 714                 DRM_ERROR("unknown parameter %d\n", param.param);
 715                 return DRM_ERR(EINVAL);
 716         }
 717
 718         return 0;
 719 }
 720
 721 int i915_driver_load(drm_device_t *dev, unsigned long flags)
 722 {
 723         /* i915 has 4 more counters */
 724         dev->counters += 4;
 725         dev->types[6] = _DRM_STAT_IRQ;
 726         dev->types[7] = _DRM_STAT_PRIMARY;
 727         dev->types[8] = _DRM_STAT_SECONDARY;
 728         dev->types[9] = _DRM_STAT_DMA;
 729
 730         return 0;
 731 }
 732
 733 void i915_driver_lastclose(drm_device_t * dev)
 734 {
 735         if (dev->dev_private) {
 736                 drm_i915_private_t *dev_priv = dev->dev_private;
 737                 i915_mem_takedown(&(dev_priv->agp_heap));
 738         }
 739         i915_dma_cleanup(dev);
 740 }
 741
 742 void i915_driver_preclose(drm_device_t * dev, DRMFILE filp)
 743 {
 744         if (dev->dev_private) {
 745                 drm_i915_private_t *dev_priv = dev->dev_private;
 746                 i915_mem_release(dev, filp, dev_priv->agp_heap);
 747         }
 748 }
 749
 750 drm_ioctl_desc_t i915_ioctls[] = {
 751         [DRM_IOCTL_NR(DRM_I915_INIT)] = {i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
 752         [DRM_IOCTL_NR(DRM_I915_FLUSH)] = {i915_flush_ioctl, DRM_AUTH},
 753         [DRM_IOCTL_NR(DRM_I915_FLIP)] = {i915_flip_bufs, DRM_AUTH},
 754         [DRM_IOCTL_NR(DRM_I915_BATCHBUFFER)] = {i915_batchbuffer, DRM_AUTH},
 755         [DRM_IOCTL_NR(DRM_I915_IRQ_EMIT)] = {i915_irq_emit, DRM_AUTH},
 756         [DRM_IOCTL_NR(DRM_I915_IRQ_WAIT)] = {i915_irq_wait, DRM_AUTH},
 757         [DRM_IOCTL_NR(DRM_I915_GETPARAM)] = {i915_getparam, DRM_AUTH},
 758         [DRM_IOCTL_NR(DRM_I915_SETPARAM)] = {i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
 759         [DRM_IOCTL_NR(DRM_I915_ALLOC)] = {i915_mem_alloc, DRM_AUTH},
 760         [DRM_IOCTL_NR(DRM_I915_FREE)] = {i915_mem_free, DRM_AUTH},
 761         [DRM_IOCTL_NR(DRM_I915_INIT_HEAP)] = {i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
 762         [DRM_IOCTL_NR(DRM_I915_CMDBUFFER)] = {i915_cmdbuffer, DRM_AUTH},
 763         [DRM_IOCTL_NR(DRM_I915_DESTROY_HEAP)] = { i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY }
 764 };
 765
 766 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
 767
 768 /**
 769  * Determine if the device really is AGP or not.
 770  *
 771  * All Intel graphics chipsets are treated as AGP, even if they are really
 772  * PCI-e.
 773  *
 774  * \param dev   The device to be tested.
 775  *
 776  * \returns
 777  * A value of 1 is always retured to indictate every i9x5 is AGP.
 778  */
 779 int i915_driver_device_is_agp(drm_device_t * dev)
 780 {
 781         return 1;
 782 }