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(struct drm_device * 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 -EBUSY;
  63 }
  64
  65 void i915_kernel_lost_context(struct drm_device * 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(struct drm_device * dev)
  81 {
  82         drm_i915_private_t *dev_priv = dev->dev_private;
  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_priv->ring.virtual_start) {
  91                 drm_core_ioremapfree(&dev_priv->ring.map, dev);
  92                 dev_priv->ring.virtual_start = 0;
  93                 dev_priv->ring.map.handle = 0;
  94                 dev_priv->ring.map.size = 0;
  95         }
  96
  97         if (dev_priv->status_page_dmah) {
  98                 drm_pci_free(dev, dev_priv->status_page_dmah);
  99                 dev_priv->status_page_dmah = NULL;
 100                 /* Need to rewrite hardware status page */
 101                 I915_WRITE(0x02080, 0x1ffff000);
 102         }
 103
 104         if (dev_priv->status_gfx_addr) {
 105                 dev_priv->status_gfx_addr = 0;
 106                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
 107                 I915_WRITE(0x2080, 0x1ffff000);
 108         }
 109
 110         return 0;
 111 }
 112
 113 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 114 {
 115         drm_i915_private_t *dev_priv = dev->dev_private;
 116
 117         dev_priv->sarea = drm_getsarea(dev);
 118         if (!dev_priv->sarea) {
 119                 DRM_ERROR("can not find sarea!\n");
 120                 i915_dma_cleanup(dev);
 121                 return -EINVAL;
 122         }
 123
 124         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 125         if (!dev_priv->mmio_map) {
 126                 i915_dma_cleanup(dev);
 127                 DRM_ERROR("can not find mmio map!\n");
 128                 return -EINVAL;
 129         }
 130
 131         dev_priv->sarea_priv = (drm_i915_sarea_t *)
 132             ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);
 133
 134         dev_priv->ring.Start = init->ring_start;
 135         dev_priv->ring.End = init->ring_end;
 136         dev_priv->ring.Size = init->ring_size;
 137         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 138
 139         dev_priv->ring.map.offset = init->ring_start;
 140         dev_priv->ring.map.size = init->ring_size;
 141         dev_priv->ring.map.type = 0;
 142         dev_priv->ring.map.flags = 0;
 143         dev_priv->ring.map.mtrr = 0;
 144
 145         drm_core_ioremap(&dev_priv->ring.map, dev);
 146
 147         if (dev_priv->ring.map.handle == NULL) {
 148                 i915_dma_cleanup(dev);
 149                 DRM_ERROR("can not ioremap virtual address for"
 150                           " ring buffer\n");
 151                 return -ENOMEM;
 152         }
 153
 154         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 155
 156         dev_priv->cpp = init->cpp;
 157         dev_priv->back_offset = init->back_offset;
 158         dev_priv->front_offset = init->front_offset;
 159         dev_priv->current_page = 0;
 160         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 161
 162         /* We are using separate values as placeholders for mechanisms for
 163          * private backbuffer/depthbuffer usage.
 164          */
 165         dev_priv->use_mi_batchbuffer_start = 0;
 166         if (IS_I965G(dev)) /* 965 doesn't support older method */
 167                 dev_priv->use_mi_batchbuffer_start = 1;
 168
 169         /* Allow hardware batchbuffers unless told otherwise.
 170          */
 171         dev_priv->allow_batchbuffer = 1;
 172
 173         /* Program Hardware Status Page */
 174         if (!I915_NEED_GFX_HWS(dev)) {
 175                 dev_priv->status_page_dmah =
 176                         drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE, 0xffffffff);
 177
 178                 if (!dev_priv->status_page_dmah) {
 179                         i915_dma_cleanup(dev);
 180                         DRM_ERROR("Can not allocate hardware status page\n");
 181                         return -ENOMEM;
 182                 }
 183                 dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
 184                 dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
 185
 186                 memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 187                 I915_WRITE(0x02080, dev_priv->dma_status_page);
 188         }
 189         DRM_DEBUG("Enabled hardware status page\n");
 190         return 0;
 191 }
 192
 193 static int i915_dma_resume(struct drm_device * dev)
 194 {
 195         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 196
 197         DRM_DEBUG("%s\n", __func__);
 198
 199         if (!dev_priv->sarea) {
 200                 DRM_ERROR("can not find sarea!\n");
 201                 return -EINVAL;
 202         }
 203
 204         if (!dev_priv->mmio_map) {
 205                 DRM_ERROR("can not find mmio map!\n");
 206                 return -EINVAL;
 207         }
 208
 209         if (dev_priv->ring.map.handle == NULL) {
 210                 DRM_ERROR("can not ioremap virtual address for"
 211                           " ring buffer\n");
 212                 return -ENOMEM;
 213         }
 214
 215         /* Program Hardware Status Page */
 216         if (!dev_priv->hw_status_page) {
 217                 DRM_ERROR("Can not find hardware status page\n");
 218                 return -EINVAL;
 219         }
 220         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 221
 222         if (dev_priv->status_gfx_addr != 0)
 223                 I915_WRITE(0x02080, dev_priv->status_gfx_addr);
 224         else
 225                 I915_WRITE(0x02080, dev_priv->dma_status_page);
 226         DRM_DEBUG("Enabled hardware status page\n");
 227
 228         return 0;
 229 }
 230
 231 static int i915_dma_init(struct drm_device *dev, void *data,
 232                          struct drm_file *file_priv)
 233 {
 234         drm_i915_init_t *init = data;
 235         int retcode = 0;
 236
 237         switch (init->func) {
 238         case I915_INIT_DMA:
 239                 retcode = i915_initialize(dev, init);
 240                 break;
 241         case I915_CLEANUP_DMA:
 242                 retcode = i915_dma_cleanup(dev);
 243                 break;
 244         case I915_RESUME_DMA:
 245                 retcode = i915_dma_resume(dev);
 246                 break;
 247         default:
 248                 retcode = -EINVAL;
 249                 break;
 250         }
 251
 252         return retcode;
 253 }
 254
 255 /* Implement basically the same security restrictions as hardware does
 256  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 257  *
 258  * Most of the calculations below involve calculating the size of a
 259  * particular instruction.  It's important to get the size right as
 260  * that tells us where the next instruction to check is.  Any illegal
 261  * instruction detected will be given a size of zero, which is a
 262  * signal to abort the rest of the buffer.
 263  */
 264 static int do_validate_cmd(int cmd)
 265 {
 266         switch (((cmd >> 29) & 0x7)) {
 267         case 0x0:
 268                 switch ((cmd >> 23) & 0x3f) {
 269                 case 0x0:
 270                         return 1;       /* MI_NOOP */
 271                 case 0x4:
 272                         return 1;       /* MI_FLUSH */
 273                 default:
 274                         return 0;       /* disallow everything else */
 275                 }
 276                 break;
 277         case 0x1:
 278                 return 0;       /* reserved */
 279         case 0x2:
 280                 return (cmd & 0xff) + 2;        /* 2d commands */
 281         case 0x3:
 282                 if (((cmd >> 24) & 0x1f) <= 0x18)
 283                         return 1;
 284
 285                 switch ((cmd >> 24) & 0x1f) {
 286                 case 0x1c:
 287                         return 1;
 288                 case 0x1d:
 289                         switch ((cmd >> 16) & 0xff) {
 290                         case 0x3:
 291                                 return (cmd & 0x1f) + 2;
 292                         case 0x4:
 293                                 return (cmd & 0xf) + 2;
 294                         default:
 295                                 return (cmd & 0xffff) + 2;
 296                         }
 297                 case 0x1e:
 298                         if (cmd & (1 << 23))
 299                                 return (cmd & 0xffff) + 1;
 300                         else
 301                                 return 1;
 302                 case 0x1f:
 303                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 304                                 return (cmd & 0x1ffff) + 2;
 305                         else if (cmd & (1 << 17))       /* indirect random */
 306                                 if ((cmd & 0xffff) == 0)
 307                                         return 0;       /* unknown length, too hard */
 308                                 else
 309                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 310                         else
 311                                 return 2;       /* indirect sequential */
 312                 default:
 313                         return 0;
 314                 }
 315         default:
 316                 return 0;
 317         }
 318
 319         return 0;
 320 }
 321
 322 static int validate_cmd(int cmd)
 323 {
 324         int ret = do_validate_cmd(cmd);
 325
 326 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 327
 328         return ret;
 329 }
 330
 331 static int i915_emit_cmds(struct drm_device * dev, int __user * buffer, int dwords)
 332 {
 333         drm_i915_private_t *dev_priv = dev->dev_private;
 334         int i;
 335         RING_LOCALS;
 336
 337         if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
 338                 return -EINVAL;
 339
 340         BEGIN_LP_RING((dwords+1)&~1);
 341
 342         for (i = 0; i < dwords;) {
 343                 int cmd, sz;
 344
 345                 if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i], sizeof(cmd)))
 346                         return -EINVAL;
 347
 348                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 349                         return -EINVAL;
 350
 351                 OUT_RING(cmd);
 352
 353                 while (++i, --sz) {
 354                         if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i],
 355                                                          sizeof(cmd))) {
 356                                 return -EINVAL;
 357                         }
 358                         OUT_RING(cmd);
 359                 }
 360         }
 361
 362         if (dwords & 1)
 363                 OUT_RING(0);
 364
 365         ADVANCE_LP_RING();
 366
 367         return 0;
 368 }
 369
 370 static int i915_emit_box(struct drm_device * dev,
 371                          struct drm_clip_rect __user * boxes,
 372                          int i, int DR1, int DR4)
 373 {
 374         drm_i915_private_t *dev_priv = dev->dev_private;
 375         struct drm_clip_rect box;
 376         RING_LOCALS;
 377
 378         if (DRM_COPY_FROM_USER_UNCHECKED(&box, &boxes[i], sizeof(box))) {
 379                 return -EFAULT;
 380         }
 381
 382         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 383                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 384                           box.x1, box.y1, box.x2, box.y2);
 385                 return -EINVAL;
 386         }
 387
 388         if (IS_I965G(dev)) {
 389                 BEGIN_LP_RING(4);
 390                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 391                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 392                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 393                 OUT_RING(DR4);
 394                 ADVANCE_LP_RING();
 395         } else {
 396                 BEGIN_LP_RING(6);
 397                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 398                 OUT_RING(DR1);
 399                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 400                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 401                 OUT_RING(DR4);
 402                 OUT_RING(0);
 403                 ADVANCE_LP_RING();
 404         }
 405
 406         return 0;
 407 }
 408
 409 /* XXX: Emitting the counter should really be moved to part of the IRQ
 410  * emit. For now, do it in both places:
 411  */
 412
 413 static void i915_emit_breadcrumb(struct drm_device *dev)
 414 {
 415         drm_i915_private_t *dev_priv = dev->dev_private;
 416         RING_LOCALS;
 417
 418         dev_priv->sarea_priv->last_enqueue = ++dev_priv->counter;
 419
 420         if (dev_priv->counter > 0x7FFFFFFFUL)
 421                 dev_priv->sarea_priv->last_enqueue = dev_priv->counter = 1;
 422
 423         BEGIN_LP_RING(4);
 424         OUT_RING(CMD_STORE_DWORD_IDX);
 425         OUT_RING(20);
 426         OUT_RING(dev_priv->counter);
 427         OUT_RING(0);
 428         ADVANCE_LP_RING();
 429 }
 430
 431 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 432                                    drm_i915_cmdbuffer_t * cmd)
 433 {
 434         int nbox = cmd->num_cliprects;
 435         int i = 0, count, ret;
 436
 437         if (cmd->sz & 0x3) {
 438                 DRM_ERROR("alignment");
 439                 return -EINVAL;
 440         }
 441
 442         i915_kernel_lost_context(dev);
 443
 444         count = nbox ? nbox : 1;
 445
 446         for (i = 0; i < count; i++) {
 447                 if (i < nbox) {
 448                         ret = i915_emit_box(dev, cmd->cliprects, i,
 449                                             cmd->DR1, cmd->DR4);
 450                         if (ret)
 451                                 return ret;
 452                 }
 453
 454                 ret = i915_emit_cmds(dev, (int __user *)cmd->buf, cmd->sz / 4);
 455                 if (ret)
 456                         return ret;
 457         }
 458
 459         i915_emit_breadcrumb(dev);
 460         return 0;
 461 }
 462
 463 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 464                                      drm_i915_batchbuffer_t * batch)
 465 {
 466         drm_i915_private_t *dev_priv = dev->dev_private;
 467         struct drm_clip_rect __user *boxes = batch->cliprects;
 468         int nbox = batch->num_cliprects;
 469         int i = 0, count;
 470         RING_LOCALS;
 471
 472         if ((batch->start | batch->used) & 0x7) {
 473                 DRM_ERROR("alignment");
 474                 return -EINVAL;
 475         }
 476
 477         i915_kernel_lost_context(dev);
 478
 479         count = nbox ? nbox : 1;
 480
 481         for (i = 0; i < count; i++) {
 482                 if (i < nbox) {
 483                         int ret = i915_emit_box(dev, boxes, i,
 484                                                 batch->DR1, batch->DR4);
 485                         if (ret)
 486                                 return ret;
 487                 }
 488
 489                 if (dev_priv->use_mi_batchbuffer_start) {
 490                         BEGIN_LP_RING(2);
 491                         if (IS_I965G(dev)) {
 492                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 493                                 OUT_RING(batch->start);
 494                         } else {
 495                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 496                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 497                         }
 498                         ADVANCE_LP_RING();
 499                 } else {
 500                         BEGIN_LP_RING(4);
 501                         OUT_RING(MI_BATCH_BUFFER);
 502                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 503                         OUT_RING(batch->start + batch->used - 4);
 504                         OUT_RING(0);
 505                         ADVANCE_LP_RING();
 506                 }
 507         }
 508
 509         i915_emit_breadcrumb(dev);
 510
 511         return 0;
 512 }
 513
 514 static int i915_dispatch_flip(struct drm_device * dev)
 515 {
 516         drm_i915_private_t *dev_priv = dev->dev_private;
 517         RING_LOCALS;
 518
 519         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
 520                   __FUNCTION__,
 521                   dev_priv->current_page,
 522                   dev_priv->sarea_priv->pf_current_page);
 523
 524         i915_kernel_lost_context(dev);
 525
 526         BEGIN_LP_RING(2);
 527         OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
 528         OUT_RING(0);
 529         ADVANCE_LP_RING();
 530
 531         BEGIN_LP_RING(6);
 532         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 533         OUT_RING(0);
 534         if (dev_priv->current_page == 0) {
 535                 OUT_RING(dev_priv->back_offset);
 536                 dev_priv->current_page = 1;
 537         } else {
 538                 OUT_RING(dev_priv->front_offset);
 539                 dev_priv->current_page = 0;
 540         }
 541         OUT_RING(0);
 542         ADVANCE_LP_RING();
 543
 544         BEGIN_LP_RING(2);
 545         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 546         OUT_RING(0);
 547         ADVANCE_LP_RING();
 548
 549         dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 550
 551         BEGIN_LP_RING(4);
 552         OUT_RING(CMD_STORE_DWORD_IDX);
 553         OUT_RING(20);
 554         OUT_RING(dev_priv->counter);
 555         OUT_RING(0);
 556         ADVANCE_LP_RING();
 557
 558         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 559         return 0;
 560 }
 561
 562 static int i915_quiescent(struct drm_device * dev)
 563 {
 564         drm_i915_private_t *dev_priv = dev->dev_private;
 565
 566         i915_kernel_lost_context(dev);
 567         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __func__);
 568 }
 569
 570 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 571                             struct drm_file *file_priv)
 572 {
 573         LOCK_TEST_WITH_RETURN(dev, file_priv);
 574
 575         return i915_quiescent(dev);
 576 }
 577
 578 static int i915_batchbuffer(struct drm_device *dev, void *data,
 579                             struct drm_file *file_priv)
 580 {
 581         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 582         u32 *hw_status = dev_priv->hw_status_page;
 583         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 584             dev_priv->sarea_priv;
 585         drm_i915_batchbuffer_t *batch = data;
 586         int ret;
 587
 588         if (!dev_priv->allow_batchbuffer) {
 589                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 590                 return -EINVAL;
 591         }
 592
 593         DRM_DEBUG("i915 batchbuffer, start %x used %d cliprects %d\n",
 594                   batch->start, batch->used, batch->num_cliprects);
 595
 596         LOCK_TEST_WITH_RETURN(dev, file_priv);
 597
 598         if (batch->num_cliprects && DRM_VERIFYAREA_READ(batch->cliprects,
 599                                                        batch->num_cliprects *
 600                                                        sizeof(struct drm_clip_rect)))
 601                 return -EFAULT;
 602
 603         ret = i915_dispatch_batchbuffer(dev, batch);
 604
 605         sarea_priv->last_dispatch = (int)hw_status[5];
 606         return ret;
 607 }
 608
 609 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 610                           struct drm_file *file_priv)
 611 {
 612         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 613         u32 *hw_status = dev_priv->hw_status_page;
 614         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 615             dev_priv->sarea_priv;
 616         drm_i915_cmdbuffer_t *cmdbuf = data;
 617         int ret;
 618
 619         DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 620                   cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 621
 622         LOCK_TEST_WITH_RETURN(dev, file_priv);
 623
 624         if (cmdbuf->num_cliprects &&
 625             DRM_VERIFYAREA_READ(cmdbuf->cliprects,
 626                                 cmdbuf->num_cliprects *
 627                                 sizeof(struct drm_clip_rect))) {
 628                 DRM_ERROR("Fault accessing cliprects\n");
 629                 return -EFAULT;
 630         }
 631
 632         ret = i915_dispatch_cmdbuffer(dev, cmdbuf);
 633         if (ret) {
 634                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 635                 return ret;
 636         }
 637
 638         sarea_priv->last_dispatch = (int)hw_status[5];
 639         return 0;
 640 }
 641
 642 static int i915_flip_bufs(struct drm_device *dev, void *data,
 643                           struct drm_file *file_priv)
 644 {
 645         DRM_DEBUG("%s\n", __FUNCTION__);
 646
 647         LOCK_TEST_WITH_RETURN(dev, file_priv);
 648
 649         return i915_dispatch_flip(dev);
 650 }
 651
 652 static int i915_getparam(struct drm_device *dev, void *data,
 653                          struct drm_file *file_priv)
 654 {
 655         drm_i915_private_t *dev_priv = dev->dev_private;
 656         drm_i915_getparam_t *param = data;
 657         int value;
 658
 659         if (!dev_priv) {
 660                 DRM_ERROR("called with no initialization\n");
 661                 return -EINVAL;
 662         }
 663
 664         switch (param->param) {
 665         case I915_PARAM_IRQ_ACTIVE:
 666                 value = dev->irq ? 1 : 0;
 667                 break;
 668         case I915_PARAM_ALLOW_BATCHBUFFER:
 669                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 670                 break;
 671         case I915_PARAM_LAST_DISPATCH:
 672                 value = READ_BREADCRUMB(dev_priv);
 673                 break;
 674         default:
 675                 DRM_ERROR("Unknown parameter %d\n", param->param);
 676                 return -EINVAL;
 677         }
 678
 679         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
 680                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 681                 return -EFAULT;
 682         }
 683
 684         return 0;
 685 }
 686
 687 static int i915_setparam(struct drm_device *dev, void *data,
 688                          struct drm_file *file_priv)
 689 {
 690         drm_i915_private_t *dev_priv = dev->dev_private;
 691         drm_i915_setparam_t *param = data;
 692
 693         if (!dev_priv) {
 694                 DRM_ERROR("called with no initialization\n");
 695                 return -EINVAL;
 696         }
 697
 698         switch (param->param) {
 699         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 700                 if (!IS_I965G(dev))
 701                         dev_priv->use_mi_batchbuffer_start = param->value;
 702                 break;
 703         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 704                 dev_priv->tex_lru_log_granularity = param->value;
 705                 break;
 706         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 707                 dev_priv->allow_batchbuffer = param->value;
 708                 break;
 709         default:
 710                 DRM_ERROR("unknown parameter %d\n", param->param);
 711                 return -EINVAL;
 712         }
 713
 714         return 0;
 715 }
 716
 717 static int i915_set_status_page(struct drm_device *dev, void *data,
 718                                 struct drm_file *file_priv)
 719 {
 720         drm_i915_private_t *dev_priv = dev->dev_private;
 721         drm_i915_hws_addr_t *hws = data;
 722
 723         if (!I915_NEED_GFX_HWS(dev))
 724                 return -EINVAL;
 725
 726         if (!dev_priv) {
 727                 DRM_ERROR("called with no initialization\n");
 728                 return -EINVAL;
 729         }
 730
 731         printk(KERN_DEBUG "set status page addr 0x%08x\n", (u32)hws->addr);
 732
 733         dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
 734
 735         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 736         dev_priv->hws_map.size = 4*1024;
 737         dev_priv->hws_map.type = 0;
 738         dev_priv->hws_map.flags = 0;
 739         dev_priv->hws_map.mtrr = 0;
 740
 741         drm_core_ioremap(&dev_priv->hws_map, dev);
 742         if (dev_priv->hws_map.handle == NULL) {
 743                 i915_dma_cleanup(dev);
 744                 dev_priv->status_gfx_addr = 0;
 745                 DRM_ERROR("can not ioremap virtual address for"
 746                                 " G33 hw status page\n");
 747                 return -ENOMEM;
 748         }
 749         dev_priv->hw_status_page = dev_priv->hws_map.handle;
 750
 751         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 752         I915_WRITE(0x02080, dev_priv->status_gfx_addr);
 753         DRM_DEBUG("load hws 0x2080 with gfx mem 0x%x\n",
 754                         dev_priv->status_gfx_addr);
 755         DRM_DEBUG("load hws at %p\n", dev_priv->hw_status_page);
 756         return 0;
 757 }
 758
 759 int i915_driver_load(struct drm_device *dev, unsigned long flags)
 760 {
 761         struct drm_i915_private *dev_priv = dev->dev_private;
 762         unsigned long base, size;
 763         int ret = 0, mmio_bar = IS_I9XX(dev) ? 0 : 1;
 764
 765         /* i915 has 4 more counters */
 766         dev->counters += 4;
 767         dev->types[6] = _DRM_STAT_IRQ;
 768         dev->types[7] = _DRM_STAT_PRIMARY;
 769         dev->types[8] = _DRM_STAT_SECONDARY;
 770         dev->types[9] = _DRM_STAT_DMA;
 771
 772         dev_priv = drm_alloc(sizeof(drm_i915_private_t), DRM_MEM_DRIVER);
 773         if (dev_priv == NULL)
 774                 return -ENOMEM;
 775
 776         memset(dev_priv, 0, sizeof(drm_i915_private_t));
 777
 778         dev->dev_private = (void *)dev_priv;
 779
 780         /* Add register map (needed for suspend/resume) */
 781         base = drm_get_resource_start(dev, mmio_bar);
 782         size = drm_get_resource_len(dev, mmio_bar);
 783
 784         ret = drm_addmap(dev, base, size, _DRM_REGISTERS,
 785                          _DRM_KERNEL | _DRM_DRIVER,
 786                          &dev_priv->mmio_map);
 787         return ret;
 788 }
 789
 790 int i915_driver_unload(struct drm_device *dev)
 791 {
 792         struct drm_i915_private *dev_priv = dev->dev_private;
 793
 794         if (dev_priv->mmio_map)
 795                 drm_rmmap(dev, dev_priv->mmio_map);
 796
 797         drm_free(dev->dev_private, sizeof(drm_i915_private_t),
 798                  DRM_MEM_DRIVER);
 799
 800         return 0;
 801 }
 802
 803 void i915_driver_lastclose(struct drm_device * dev)
 804 {
 805         drm_i915_private_t *dev_priv = dev->dev_private;
 806
 807         if (!dev_priv)
 808                 return;
 809
 810         if (dev_priv->agp_heap)
 811                 i915_mem_takedown(&(dev_priv->agp_heap));
 812
 813         i915_dma_cleanup(dev);
 814 }
 815
 816 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
 817 {
 818         drm_i915_private_t *dev_priv = dev->dev_private;
 819         i915_mem_release(dev, file_priv, dev_priv->agp_heap);
 820 }
 821
 822 struct drm_ioctl_desc i915_ioctls[] = {
 823         DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 824         DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
 825         DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH),
 826         DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
 827         DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
 828         DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
 829         DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH),
 830         DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 831         DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH),
 832         DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH),
 833         DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 834         DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
 835         DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
 836         DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
 837         DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH ),
 838         DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
 839         DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH),
 840 };
 841
 842 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
 843
 844 /**
 845  * Determine if the device really is AGP or not.
 846  *
 847  * All Intel graphics chipsets are treated as AGP, even if they are really
 848  * PCI-e.
 849  *
 850  * \param dev   The device to be tested.
 851  *
 852  * \returns
 853  * A value of 1 is always retured to indictate every i9x5 is AGP.
 854  */
 855 int i915_driver_device_is_agp(struct drm_device * dev)
 856 {
 857         return 1;
 858 }