git.oblomov.eu Git - linux-2.6/blob - 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 #define IS_I965G(dev) (dev->pci_device == 0x2972 || \
  35                        dev->pci_device == 0x2982 || \
  36                        dev->pci_device == 0x2992 || \
  37                        dev->pci_device == 0x29A2 || \
  38                        dev->pci_device == 0x2A02)
  39
  40 /* Really want an OS-independent resettable timer.  Would like to have
  41  * this loop run for (eg) 3 sec, but have the timer reset every time
  42  * the head pointer changes, so that EBUSY only happens if the ring
  43  * actually stalls for (eg) 3 seconds.
  44  */
  45 int i915_wait_ring(drm_device_t * dev, int n, const char *caller)
  46 {
  47         drm_i915_private_t *dev_priv = dev->dev_private;
  48         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  49         u32 last_head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  50         int i;
  51
  52         for (i = 0; i < 10000; i++) {
  53                 ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  54                 ring->space = ring->head - (ring->tail + 8);
  55                 if (ring->space < 0)
  56                         ring->space += ring->Size;
  57                 if (ring->space >= n)
  58                         return 0;
  59
  60                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
  61
  62                 if (ring->head != last_head)
  63                         i = 0;
  64
  65                 last_head = ring->head;
  66         }
  67
  68         return DRM_ERR(EBUSY);
  69 }
  70
  71 void i915_kernel_lost_context(drm_device_t * dev)
  72 {
  73         drm_i915_private_t *dev_priv = dev->dev_private;
  74         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  75
  76         ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  77         ring->tail = I915_READ(LP_RING + RING_TAIL) & TAIL_ADDR;
  78         ring->space = ring->head - (ring->tail + 8);
  79         if (ring->space < 0)
  80                 ring->space += ring->Size;
  81
  82         if (ring->head == ring->tail)
  83                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
  84 }
  85
  86 static int i915_dma_cleanup(drm_device_t * dev)
  87 {
  88         /* Make sure interrupts are disabled here because the uninstall ioctl
  89          * may not have been called from userspace and after dev_private
  90          * is freed, it's too late.
  91          */
  92         if (dev->irq)
  93                 drm_irq_uninstall(dev);
  94
  95         if (dev->dev_private) {
  96                 drm_i915_private_t *dev_priv =
  97                     (drm_i915_private_t *) dev->dev_private;
  98
  99                 if (dev_priv->ring.virtual_start) {
 100                         drm_core_ioremapfree(&dev_priv->ring.map, dev);
 101                 }
 102
 103                 if (dev_priv->status_page_dmah) {
 104                         drm_pci_free(dev, dev_priv->status_page_dmah);
 105                         /* Need to rewrite hardware status page */
 106                         I915_WRITE(0x02080, 0x1ffff000);
 107                 }
 108
 109                 drm_free(dev->dev_private, sizeof(drm_i915_private_t),
 110                          DRM_MEM_DRIVER);
 111
 112                 dev->dev_private = NULL;
 113         }
 114
 115         return 0;
 116 }
 117
 118 static int i915_initialize(drm_device_t * dev,
 119                            drm_i915_private_t * dev_priv,
 120                            drm_i915_init_t * init)
 121 {
 122         memset(dev_priv, 0, sizeof(drm_i915_private_t));
 123
 124         DRM_GETSAREA();
 125         if (!dev_priv->sarea) {
 126                 DRM_ERROR("can not find sarea!\n");
 127                 dev->dev_private = (void *)dev_priv;
 128                 i915_dma_cleanup(dev);
 129                 return DRM_ERR(EINVAL);
 130         }
 131
 132         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 133         if (!dev_priv->mmio_map) {
 134                 dev->dev_private = (void *)dev_priv;
 135                 i915_dma_cleanup(dev);
 136                 DRM_ERROR("can not find mmio map!\n");
 137                 return DRM_ERR(EINVAL);
 138         }
 139
 140         dev_priv->sarea_priv = (drm_i915_sarea_t *)
 141             ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);
 142
 143         dev_priv->ring.Start = init->ring_start;
 144         dev_priv->ring.End = init->ring_end;
 145         dev_priv->ring.Size = init->ring_size;
 146         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 147
 148         dev_priv->ring.map.offset = init->ring_start;
 149         dev_priv->ring.map.size = init->ring_size;
 150         dev_priv->ring.map.type = 0;
 151         dev_priv->ring.map.flags = 0;
 152         dev_priv->ring.map.mtrr = 0;
 153
 154         drm_core_ioremap(&dev_priv->ring.map, dev);
 155
 156         if (dev_priv->ring.map.handle == NULL) {
 157                 dev->dev_private = (void *)dev_priv;
 158                 i915_dma_cleanup(dev);
 159                 DRM_ERROR("can not ioremap virtual address for"
 160                           " ring buffer\n");
 161                 return DRM_ERR(ENOMEM);
 162         }
 163
 164         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 165
 166         dev_priv->cpp = init->cpp;
 167         dev_priv->back_offset = init->back_offset;
 168         dev_priv->front_offset = init->front_offset;
 169         dev_priv->current_page = 0;
 170         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 171
 172         /* We are using separate values as placeholders for mechanisms for
 173          * private backbuffer/depthbuffer usage.
 174          */
 175         dev_priv->use_mi_batchbuffer_start = 0;
 176
 177         /* Allow hardware batchbuffers unless told otherwise.
 178          */
 179         dev_priv->allow_batchbuffer = 1;
 180
 181         /* Program Hardware Status Page */
 182         dev_priv->status_page_dmah = drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE,
 183                                                    0xffffffff);
 184
 185         if (!dev_priv->status_page_dmah) {
 186                 dev->dev_private = (void *)dev_priv;
 187                 i915_dma_cleanup(dev);
 188                 DRM_ERROR("Can not allocate hardware status page\n");
 189                 return DRM_ERR(ENOMEM);
 190         }
 191         dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
 192         dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
 193
 194         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 195         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 196
 197         I915_WRITE(0x02080, dev_priv->dma_status_page);
 198         DRM_DEBUG("Enabled hardware status page\n");
 199
 200         dev->dev_private = (void *)dev_priv;
 201
 202         return 0;
 203 }
 204
 205 static int i915_dma_resume(drm_device_t * dev)
 206 {
 207         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 208
 209         DRM_DEBUG("%s\n", __FUNCTION__);
 210
 211         if (!dev_priv->sarea) {
 212                 DRM_ERROR("can not find sarea!\n");
 213                 return DRM_ERR(EINVAL);
 214         }
 215
 216         if (!dev_priv->mmio_map) {
 217                 DRM_ERROR("can not find mmio map!\n");
 218                 return DRM_ERR(EINVAL);
 219         }
 220
 221         if (dev_priv->ring.map.handle == NULL) {
 222                 DRM_ERROR("can not ioremap virtual address for"
 223                           " ring buffer\n");
 224                 return DRM_ERR(ENOMEM);
 225         }
 226
 227         /* Program Hardware Status Page */
 228         if (!dev_priv->hw_status_page) {
 229                 DRM_ERROR("Can not find hardware status page\n");
 230                 return DRM_ERR(EINVAL);
 231         }
 232         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 233
 234         I915_WRITE(0x02080, dev_priv->dma_status_page);
 235         DRM_DEBUG("Enabled hardware status page\n");
 236
 237         return 0;
 238 }
 239
 240 static int i915_dma_init(DRM_IOCTL_ARGS)
 241 {
 242         DRM_DEVICE;
 243         drm_i915_private_t *dev_priv;
 244         drm_i915_init_t init;
 245         int retcode = 0;
 246
 247         DRM_COPY_FROM_USER_IOCTL(init, (drm_i915_init_t __user *) data,
 248                                  sizeof(init));
 249
 250         switch (init.func) {
 251         case I915_INIT_DMA:
 252                 dev_priv = drm_alloc(sizeof(drm_i915_private_t),
 253                                      DRM_MEM_DRIVER);
 254                 if (dev_priv == NULL)
 255                         return DRM_ERR(ENOMEM);
 256                 retcode = i915_initialize(dev, dev_priv, &init);
 257                 break;
 258         case I915_CLEANUP_DMA:
 259                 retcode = i915_dma_cleanup(dev);
 260                 break;
 261         case I915_RESUME_DMA:
 262                 retcode = i915_dma_resume(dev);
 263                 break;
 264         default:
 265                 retcode = DRM_ERR(EINVAL);
 266                 break;
 267         }
 268
 269         return retcode;
 270 }
 271
 272 /* Implement basically the same security restrictions as hardware does
 273  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 274  *
 275  * Most of the calculations below involve calculating the size of a
 276  * particular instruction.  It's important to get the size right as
 277  * that tells us where the next instruction to check is.  Any illegal
 278  * instruction detected will be given a size of zero, which is a
 279  * signal to abort the rest of the buffer.
 280  */
 281 static int do_validate_cmd(int cmd)
 282 {
 283         switch (((cmd >> 29) & 0x7)) {
 284         case 0x0:
 285                 switch ((cmd >> 23) & 0x3f) {
 286                 case 0x0:
 287                         return 1;       /* MI_NOOP */
 288                 case 0x4:
 289                         return 1;       /* MI_FLUSH */
 290                 default:
 291                         return 0;       /* disallow everything else */
 292                 }
 293                 break;
 294         case 0x1:
 295                 return 0;       /* reserved */
 296         case 0x2:
 297                 return (cmd & 0xff) + 2;        /* 2d commands */
 298         case 0x3:
 299                 if (((cmd >> 24) & 0x1f) <= 0x18)
 300                         return 1;
 301
 302                 switch ((cmd >> 24) & 0x1f) {
 303                 case 0x1c:
 304                         return 1;
 305                 case 0x1d:
 306                         switch ((cmd >> 16) & 0xff) {
 307                         case 0x3:
 308                                 return (cmd & 0x1f) + 2;
 309                         case 0x4:
 310                                 return (cmd & 0xf) + 2;
 311                         default:
 312                                 return (cmd & 0xffff) + 2;
 313                         }
 314                 case 0x1e:
 315                         if (cmd & (1 << 23))
 316                                 return (cmd & 0xffff) + 1;
 317                         else
 318                                 return 1;
 319                 case 0x1f:
 320                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 321                                 return (cmd & 0x1ffff) + 2;
 322                         else if (cmd & (1 << 17))       /* indirect random */
 323                                 if ((cmd & 0xffff) == 0)
 324                                         return 0;       /* unknown length, too hard */
 325                                 else
 326                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 327                         else
 328                                 return 2;       /* indirect sequential */
 329                 default:
 330                         return 0;
 331                 }
 332         default:
 333                 return 0;
 334         }
 335
 336         return 0;
 337 }
 338
 339 static int validate_cmd(int cmd)
 340 {
 341         int ret = do_validate_cmd(cmd);
 342
 343 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 344
 345         return ret;
 346 }
 347
 348 static int i915_emit_cmds(drm_device_t * dev, int __user * buffer, int dwords)
 349 {
 350         drm_i915_private_t *dev_priv = dev->dev_private;
 351         int i;
 352         RING_LOCALS;
 353
 354         if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
 355                 return DRM_ERR(EINVAL);
 356
 357         BEGIN_LP_RING((dwords+1)&~1);
 358
 359         for (i = 0; i < dwords;) {
 360                 int cmd, sz;
 361
 362                 if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i], sizeof(cmd)))
 363                         return DRM_ERR(EINVAL);
 364
 365                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 366                         return DRM_ERR(EINVAL);
 367
 368                 OUT_RING(cmd);
 369
 370                 while (++i, --sz) {
 371                         if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i],
 372                                                          sizeof(cmd))) {
 373                                 return DRM_ERR(EINVAL);
 374                         }
 375                         OUT_RING(cmd);
 376                 }
 377         }
 378
 379         if (dwords & 1)
 380                 OUT_RING(0);
 381
 382         ADVANCE_LP_RING();
 383
 384         return 0;
 385 }
 386
 387 static int i915_emit_box(drm_device_t * dev,
 388                          drm_clip_rect_t __user * boxes,
 389                          int i, int DR1, int DR4)
 390 {
 391         drm_i915_private_t *dev_priv = dev->dev_private;
 392         drm_clip_rect_t box;
 393         RING_LOCALS;
 394
 395         if (DRM_COPY_FROM_USER_UNCHECKED(&box, &boxes[i], sizeof(box))) {
 396                 return DRM_ERR(EFAULT);
 397         }
 398
 399         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 400                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 401                           box.x1, box.y1, box.x2, box.y2);
 402                 return DRM_ERR(EINVAL);
 403         }
 404
 405         if (IS_I965G(dev)) {
 406                 BEGIN_LP_RING(4);
 407                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 408                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 409                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 410                 OUT_RING(DR4);
 411                 ADVANCE_LP_RING();
 412         } else {
 413                 BEGIN_LP_RING(6);
 414                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 415                 OUT_RING(DR1);
 416                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 417                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 418                 OUT_RING(DR4);
 419                 OUT_RING(0);
 420                 ADVANCE_LP_RING();
 421         }
 422
 423         return 0;
 424 }
 425
 426 /* XXX: Emitting the counter should really be moved to part of the IRQ
 427  * emit. For now, do it in both places:
 428  */
 429
 430 static void i915_emit_breadcrumb(drm_device_t *dev)
 431 {
 432         drm_i915_private_t *dev_priv = dev->dev_private;
 433         RING_LOCALS;
 434
 435         dev_priv->sarea_priv->last_enqueue = ++dev_priv->counter;
 436
 437         if (dev_priv->counter > 0x7FFFFFFFUL)
 438                 dev_priv->sarea_priv->last_enqueue = dev_priv->counter = 1;
 439
 440         BEGIN_LP_RING(4);
 441         OUT_RING(CMD_STORE_DWORD_IDX);
 442         OUT_RING(20);
 443         OUT_RING(dev_priv->counter);
 444         OUT_RING(0);
 445         ADVANCE_LP_RING();
 446 }
 447
 448 static int i915_dispatch_cmdbuffer(drm_device_t * dev,
 449                                    drm_i915_cmdbuffer_t * cmd)
 450 {
 451         int nbox = cmd->num_cliprects;
 452         int i = 0, count, ret;
 453
 454         if (cmd->sz & 0x3) {
 455                 DRM_ERROR("alignment");
 456                 return DRM_ERR(EINVAL);
 457         }
 458
 459         i915_kernel_lost_context(dev);
 460
 461         count = nbox ? nbox : 1;
 462
 463         for (i = 0; i < count; i++) {
 464                 if (i < nbox) {
 465                         ret = i915_emit_box(dev, cmd->cliprects, i,
 466                                             cmd->DR1, cmd->DR4);
 467                         if (ret)
 468                                 return ret;
 469                 }
 470
 471                 ret = i915_emit_cmds(dev, (int __user *)cmd->buf, cmd->sz / 4);
 472                 if (ret)
 473                         return ret;
 474         }
 475
 476         i915_emit_breadcrumb(dev);
 477         return 0;
 478 }
 479
 480 static int i915_dispatch_batchbuffer(drm_device_t * dev,
 481                                      drm_i915_batchbuffer_t * batch)
 482 {
 483         drm_i915_private_t *dev_priv = dev->dev_private;
 484         drm_clip_rect_t __user *boxes = batch->cliprects;
 485         int nbox = batch->num_cliprects;
 486         int i = 0, count;
 487         RING_LOCALS;
 488
 489         if ((batch->start | batch->used) & 0x7) {
 490                 DRM_ERROR("alignment");
 491                 return DRM_ERR(EINVAL);
 492         }
 493
 494         i915_kernel_lost_context(dev);
 495
 496         count = nbox ? nbox : 1;
 497
 498         for (i = 0; i < count; i++) {
 499                 if (i < nbox) {
 500                         int ret = i915_emit_box(dev, boxes, i,
 501                                                 batch->DR1, batch->DR4);
 502                         if (ret)
 503                                 return ret;
 504                 }
 505
 506                 if (dev_priv->use_mi_batchbuffer_start) {
 507                         BEGIN_LP_RING(2);
 508                         OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 509                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 510                         ADVANCE_LP_RING();
 511                 } else {
 512                         BEGIN_LP_RING(4);
 513                         OUT_RING(MI_BATCH_BUFFER);
 514                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 515                         OUT_RING(batch->start + batch->used - 4);
 516                         OUT_RING(0);
 517                         ADVANCE_LP_RING();
 518                 }
 519         }
 520
 521         i915_emit_breadcrumb(dev);
 522
 523         return 0;
 524 }
 525
 526 static int i915_dispatch_flip(drm_device_t * dev)
 527 {
 528         drm_i915_private_t *dev_priv = dev->dev_private;
 529         RING_LOCALS;
 530
 531         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
 532                   __FUNCTION__,
 533                   dev_priv->current_page,
 534                   dev_priv->sarea_priv->pf_current_page);
 535
 536         i915_kernel_lost_context(dev);
 537
 538         BEGIN_LP_RING(2);
 539         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 540         OUT_RING(0);
 541         ADVANCE_LP_RING();
 542
 543         BEGIN_LP_RING(6);
 544         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 545         OUT_RING(0);
 546         if (dev_priv->current_page == 0) {
 547                 OUT_RING(dev_priv->back_offset);
 548                 dev_priv->current_page = 1;
 549         } else {
 550                 OUT_RING(dev_priv->front_offset);
 551                 dev_priv->current_page = 0;
 552         }
 553         OUT_RING(0);
 554         ADVANCE_LP_RING();
 555
 556         BEGIN_LP_RING(2);
 557         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 558         OUT_RING(0);
 559         ADVANCE_LP_RING();
 560
 561         dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 562
 563         BEGIN_LP_RING(4);
 564         OUT_RING(CMD_STORE_DWORD_IDX);
 565         OUT_RING(20);
 566         OUT_RING(dev_priv->counter);
 567         OUT_RING(0);
 568         ADVANCE_LP_RING();
 569
 570         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 571         return 0;
 572 }
 573
 574 static int i915_quiescent(drm_device_t * dev)
 575 {
 576         drm_i915_private_t *dev_priv = dev->dev_private;
 577
 578         i915_kernel_lost_context(dev);
 579         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __FUNCTION__);
 580 }
 581
 582 static int i915_flush_ioctl(DRM_IOCTL_ARGS)
 583 {
 584         DRM_DEVICE;
 585
 586         LOCK_TEST_WITH_RETURN(dev, filp);
 587
 588         return i915_quiescent(dev);
 589 }
 590
 591 static int i915_batchbuffer(DRM_IOCTL_ARGS)
 592 {
 593         DRM_DEVICE;
 594         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 595         u32 *hw_status = dev_priv->hw_status_page;
 596         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 597             dev_priv->sarea_priv;
 598         drm_i915_batchbuffer_t batch;
 599         int ret;
 600
 601         if (!dev_priv->allow_batchbuffer) {
 602                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 603                 return DRM_ERR(EINVAL);
 604         }
 605
 606         DRM_COPY_FROM_USER_IOCTL(batch, (drm_i915_batchbuffer_t __user *) data,
 607                                  sizeof(batch));
 608
 609         DRM_DEBUG("i915 batchbuffer, start %x used %d cliprects %d\n",
 610                   batch.start, batch.used, batch.num_cliprects);
 611
 612         LOCK_TEST_WITH_RETURN(dev, filp);
 613
 614         if (batch.num_cliprects && DRM_VERIFYAREA_READ(batch.cliprects,
 615                                                        batch.num_cliprects *
 616                                                        sizeof(drm_clip_rect_t)))
 617                 return DRM_ERR(EFAULT);
 618
 619         ret = i915_dispatch_batchbuffer(dev, &batch);
 620
 621         sarea_priv->last_dispatch = (int)hw_status[5];
 622         return ret;
 623 }
 624
 625 static int i915_cmdbuffer(DRM_IOCTL_ARGS)
 626 {
 627         DRM_DEVICE;
 628         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 629         u32 *hw_status = dev_priv->hw_status_page;
 630         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 631             dev_priv->sarea_priv;
 632         drm_i915_cmdbuffer_t cmdbuf;
 633         int ret;
 634
 635         DRM_COPY_FROM_USER_IOCTL(cmdbuf, (drm_i915_cmdbuffer_t __user *) data,
 636                                  sizeof(cmdbuf));
 637
 638         DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 639                   cmdbuf.buf, cmdbuf.sz, cmdbuf.num_cliprects);
 640
 641         LOCK_TEST_WITH_RETURN(dev, filp);
 642
 643         if (cmdbuf.num_cliprects &&
 644             DRM_VERIFYAREA_READ(cmdbuf.cliprects,
 645                                 cmdbuf.num_cliprects *
 646                                 sizeof(drm_clip_rect_t))) {
 647                 DRM_ERROR("Fault accessing cliprects\n");
 648                 return DRM_ERR(EFAULT);
 649         }
 650
 651         ret = i915_dispatch_cmdbuffer(dev, &cmdbuf);
 652         if (ret) {
 653                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 654                 return ret;
 655         }
 656
 657         sarea_priv->last_dispatch = (int)hw_status[5];
 658         return 0;
 659 }
 660
 661 static int i915_flip_bufs(DRM_IOCTL_ARGS)
 662 {
 663         DRM_DEVICE;
 664
 665         DRM_DEBUG("%s\n", __FUNCTION__);
 666
 667         LOCK_TEST_WITH_RETURN(dev, filp);
 668
 669         return i915_dispatch_flip(dev);
 670 }
 671
 672 static int i915_getparam(DRM_IOCTL_ARGS)
 673 {
 674         DRM_DEVICE;
 675         drm_i915_private_t *dev_priv = dev->dev_private;
 676         drm_i915_getparam_t param;
 677         int value;
 678
 679         if (!dev_priv) {
 680                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
 681                 return DRM_ERR(EINVAL);
 682         }
 683
 684         DRM_COPY_FROM_USER_IOCTL(param, (drm_i915_getparam_t __user *) data,
 685                                  sizeof(param));
 686
 687         switch (param.param) {
 688         case I915_PARAM_IRQ_ACTIVE:
 689                 value = dev->irq ? 1 : 0;
 690                 break;
 691         case I915_PARAM_ALLOW_BATCHBUFFER:
 692                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 693                 break;
 694         case I915_PARAM_LAST_DISPATCH:
 695                 value = READ_BREADCRUMB(dev_priv);
 696                 break;
 697         default:
 698                 DRM_ERROR("Unknown parameter %d\n", param.param);
 699                 return DRM_ERR(EINVAL);
 700         }
 701
 702         if (DRM_COPY_TO_USER(param.value, &value, sizeof(int))) {
 703                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 704                 return DRM_ERR(EFAULT);
 705         }
 706
 707         return 0;
 708 }
 709
 710 static int i915_setparam(DRM_IOCTL_ARGS)
 711 {
 712         DRM_DEVICE;
 713         drm_i915_private_t *dev_priv = dev->dev_private;
 714         drm_i915_setparam_t param;
 715
 716         if (!dev_priv) {
 717                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
 718                 return DRM_ERR(EINVAL);
 719         }
 720
 721         DRM_COPY_FROM_USER_IOCTL(param, (drm_i915_setparam_t __user *) data,
 722                                  sizeof(param));
 723
 724         switch (param.param) {
 725         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 726                 dev_priv->use_mi_batchbuffer_start = param.value;
 727                 break;
 728         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 729                 dev_priv->tex_lru_log_granularity = param.value;
 730                 break;
 731         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 732                 dev_priv->allow_batchbuffer = param.value;
 733                 break;
 734         default:
 735                 DRM_ERROR("unknown parameter %d\n", param.param);
 736                 return DRM_ERR(EINVAL);
 737         }
 738
 739         return 0;
 740 }
 741
 742 int i915_driver_load(drm_device_t *dev, unsigned long flags)
 743 {
 744         /* i915 has 4 more counters */
 745         dev->counters += 4;
 746         dev->types[6] = _DRM_STAT_IRQ;
 747         dev->types[7] = _DRM_STAT_PRIMARY;
 748         dev->types[8] = _DRM_STAT_SECONDARY;
 749         dev->types[9] = _DRM_STAT_DMA;
 750
 751         return 0;
 752 }
 753
 754 void i915_driver_lastclose(drm_device_t * dev)
 755 {
 756         if (dev->dev_private) {
 757                 drm_i915_private_t *dev_priv = dev->dev_private;
 758                 i915_mem_takedown(&(dev_priv->agp_heap));
 759         }
 760         i915_dma_cleanup(dev);
 761 }
 762
 763 void i915_driver_preclose(drm_device_t * dev, DRMFILE filp)
 764 {
 765         if (dev->dev_private) {
 766                 drm_i915_private_t *dev_priv = dev->dev_private;
 767                 i915_mem_release(dev, filp, dev_priv->agp_heap);
 768         }
 769 }
 770
 771 drm_ioctl_desc_t i915_ioctls[] = {
 772         [DRM_IOCTL_NR(DRM_I915_INIT)] = {i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
 773         [DRM_IOCTL_NR(DRM_I915_FLUSH)] = {i915_flush_ioctl, DRM_AUTH},
 774         [DRM_IOCTL_NR(DRM_I915_FLIP)] = {i915_flip_bufs, DRM_AUTH},
 775         [DRM_IOCTL_NR(DRM_I915_BATCHBUFFER)] = {i915_batchbuffer, DRM_AUTH},
 776         [DRM_IOCTL_NR(DRM_I915_IRQ_EMIT)] = {i915_irq_emit, DRM_AUTH},
 777         [DRM_IOCTL_NR(DRM_I915_IRQ_WAIT)] = {i915_irq_wait, DRM_AUTH},
 778         [DRM_IOCTL_NR(DRM_I915_GETPARAM)] = {i915_getparam, DRM_AUTH},
 779         [DRM_IOCTL_NR(DRM_I915_SETPARAM)] = {i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
 780         [DRM_IOCTL_NR(DRM_I915_ALLOC)] = {i915_mem_alloc, DRM_AUTH},
 781         [DRM_IOCTL_NR(DRM_I915_FREE)] = {i915_mem_free, DRM_AUTH},
 782         [DRM_IOCTL_NR(DRM_I915_INIT_HEAP)] = {i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
 783         [DRM_IOCTL_NR(DRM_I915_CMDBUFFER)] = {i915_cmdbuffer, DRM_AUTH},
 784         [DRM_IOCTL_NR(DRM_I915_DESTROY_HEAP)] = { i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
 785         [DRM_IOCTL_NR(DRM_I915_SET_VBLANK_PIPE)] = { i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
 786         [DRM_IOCTL_NR(DRM_I915_GET_VBLANK_PIPE)] = { i915_vblank_pipe_get, DRM_AUTH },
 787         [DRM_IOCTL_NR(DRM_I915_VBLANK_SWAP)] = {i915_vblank_swap, DRM_AUTH},
 788 };
 789
 790 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
 791
 792 /**
 793  * Determine if the device really is AGP or not.
 794  *
 795  * All Intel graphics chipsets are treated as AGP, even if they are really
 796  * PCI-e.
 797  *
 798  * \param dev   The device to be tested.
 799  *
 800  * \returns
 801  * A value of 1 is always retured to indictate every i9x5 is AGP.
 802  */
 803 int i915_driver_device_is_agp(drm_device_t * dev)
 804 {
 805         return 1;
 806 }