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