sys/dev/drm/i915/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 "dev/drm/drmP.h"
  30 #include "dev/drm/drm.h"
  31 #include "dev/drm/i915_drm.h"
  32 #include "dev/drm/i915/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(PRB0_HEAD) & HEAD_ADDR;
  44         u32 acthd_reg = IS_I965G(dev) ? ACTHD_I965 : ACTHD;
  45         u32 last_acthd = I915_READ(acthd_reg);
  46         u32 acthd;
  47         int i;
  48
  49         for (i = 0; i < 100000; i++) {
  50                 ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
  51                 acthd = I915_READ(acthd_reg);
  52                 ring->space = ring->head - (ring->tail + 8);
  53                 if (ring->space < 0)
  54                         ring->space += ring->Size;
  55                 if (ring->space >= n)
  56                         return 0;
  57
  58                 if (dev_priv->sarea_priv)
  59                         dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
  60
  61                 if (ring->head != last_head)
  62                         i = 0;
  63
  64                 if (acthd != last_acthd)
  65                         i = 0;
  66
  67                 last_head = ring->head;
  68                 last_acthd = acthd;
  69                 DRM_UDELAY(10 * 1000);
  70         }
  71
  72         return -EBUSY;
  73 }
  74
  75 /**
  76  * Sets up the hardware status page for devices that need a physical address
  77  * in the register.
  78  */
  79 static int i915_init_phys_hws(struct drm_device *dev)
  80 {
  81         drm_i915_private_t *dev_priv = dev->dev_private;
  82
  83         /* Program Hardware Status Page */
  84         DRM_UNLOCK();
  85         dev_priv->status_page_dmah =
  86                 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE, 0xffffffff);
  87         DRM_LOCK();
  88         if (!dev_priv->status_page_dmah) {
  89                 DRM_ERROR("Can not allocate hardware status page\n");
  90                 return -ENOMEM;
  91         }
  92         dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
  93         dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
  94
  95         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
  96
  97         I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
  98         DRM_DEBUG("Enabled hardware status page\n");
  99         return 0;
 100 }
 101
 102 /**
 103  * Frees the hardware status page, whether it's a physical address or a virtual
 104  * address set up by the X Server.
 105  */
 106 static void i915_free_hws(struct drm_device *dev)
 107 {
 108         drm_i915_private_t *dev_priv = dev->dev_private;
 109         if (dev_priv->status_page_dmah) {
 110                 drm_pci_free(dev, dev_priv->status_page_dmah);
 111                 dev_priv->status_page_dmah = NULL;
 112         }
 113
 114         if (dev_priv->status_gfx_addr) {
 115                 dev_priv->status_gfx_addr = 0;
 116                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
 117         }
 118
 119         /* Need to rewrite hardware status page */
 120         I915_WRITE(HWS_PGA, 0x1ffff000);
 121 }
 122
 123 void i915_kernel_lost_context(struct drm_device * dev)
 124 {
 125         drm_i915_private_t *dev_priv = dev->dev_private;
 126         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
 127
 128         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 129         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 130         ring->space = ring->head - (ring->tail + 8);
 131         if (ring->space < 0)
 132                 ring->space += ring->Size;
 133
 134         if (ring->head == ring->tail && dev_priv->sarea_priv)
 135                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 136 }
 137
 138 static int i915_dma_cleanup(struct drm_device * dev)
 139 {
 140         drm_i915_private_t *dev_priv = dev->dev_private;
 141         /* Make sure interrupts are disabled here because the uninstall ioctl
 142          * may not have been called from userspace and after dev_private
 143          * is freed, it's too late.
 144          */
 145         if (dev->irq_enabled)
 146                 drm_irq_uninstall(dev);
 147
 148         if (dev_priv->ring.virtual_start) {
 149                 drm_core_ioremapfree(&dev_priv->ring.map, dev);
 150                 dev_priv->ring.virtual_start = NULL;
 151                 dev_priv->ring.map.handle = NULL;
 152                 dev_priv->ring.map.size = 0;
 153         }
 154
 155         /* Clear the HWS virtual address at teardown */
 156         if (I915_NEED_GFX_HWS(dev))
 157                 i915_free_hws(dev);
 158
 159         return 0;
 160 }
 161
 162 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 163 {
 164         drm_i915_private_t *dev_priv = dev->dev_private;
 165
 166         dev_priv->sarea = drm_getsarea(dev);
 167         if (!dev_priv->sarea) {
 168                 DRM_ERROR("can not find sarea!\n");
 169                 i915_dma_cleanup(dev);
 170                 return -EINVAL;
 171         }
 172
 173         dev_priv->sarea_priv = (drm_i915_sarea_t *)
 174             ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);
 175
 176         if (init->ring_size != 0) {
 177                 if (dev_priv->ring.ring_obj != NULL) {
 178                         i915_dma_cleanup(dev);
 179                         DRM_ERROR("Client tried to initialize ringbuffer in "
 180                                   "GEM mode\n");
 181                         return -EINVAL;
 182                 }
 183
 184                 dev_priv->ring.Size = init->ring_size;
 185                 dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 186
 187                 dev_priv->ring.map.offset = init->ring_start;
 188                 dev_priv->ring.map.size = init->ring_size;
 189                 dev_priv->ring.map.type = 0;
 190                 dev_priv->ring.map.flags = 0;
 191                 dev_priv->ring.map.mtrr = 0;
 192
 193                 drm_core_ioremap_wc(&dev_priv->ring.map, dev);
 194
 195                 if (dev_priv->ring.map.handle == NULL) {
 196                         i915_dma_cleanup(dev);
 197                         DRM_ERROR("can not ioremap virtual address for"
 198                                   " ring buffer\n");
 199                         return -ENOMEM;
 200                 }
 201         }
 202
 203         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 204
 205         dev_priv->cpp = init->cpp;
 206         dev_priv->back_offset = init->back_offset;
 207         dev_priv->front_offset = init->front_offset;
 208         dev_priv->current_page = 0;
 209         dev_priv->sarea_priv->pf_current_page = 0;
 210
 211         /* Allow hardware batchbuffers unless told otherwise.
 212          */
 213         dev_priv->allow_batchbuffer = 1;
 214
 215         return 0;
 216 }
 217
 218 static int i915_dma_resume(struct drm_device * dev)
 219 {
 220         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 221
 222         DRM_DEBUG("\n");
 223
 224         if (!dev_priv->sarea) {
 225                 DRM_ERROR("can not find sarea!\n");
 226                 return -EINVAL;
 227         }
 228
 229         if (dev_priv->ring.map.handle == NULL) {
 230                 DRM_ERROR("can not ioremap virtual address for"
 231                           " ring buffer\n");
 232                 return -ENOMEM;
 233         }
 234
 235         /* Program Hardware Status Page */
 236         if (!dev_priv->hw_status_page) {
 237                 DRM_ERROR("Can not find hardware status page\n");
 238                 return -EINVAL;
 239         }
 240         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 241
 242         if (dev_priv->status_gfx_addr != 0)
 243                 I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 244         else
 245                 I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 246         DRM_DEBUG("Enabled hardware status page\n");
 247
 248         return 0;
 249 }
 250
 251 static int i915_dma_init(struct drm_device *dev, void *data,
 252                          struct drm_file *file_priv)
 253 {
 254         drm_i915_init_t *init = data;
 255         int retcode = 0;
 256
 257         switch (init->func) {
 258         case I915_INIT_DMA:
 259                 retcode = i915_initialize(dev, init);
 260                 break;
 261         case I915_CLEANUP_DMA:
 262                 retcode = i915_dma_cleanup(dev);
 263                 break;
 264         case I915_RESUME_DMA:
 265                 retcode = i915_dma_resume(dev);
 266                 break;
 267         default:
 268                 retcode = -EINVAL;
 269                 break;
 270         }
 271
 272         return retcode;
 273 }
 274
 275 /* Implement basically the same security restrictions as hardware does
 276  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 277  *
 278  * Most of the calculations below involve calculating the size of a
 279  * particular instruction.  It's important to get the size right as
 280  * that tells us where the next instruction to check is.  Any illegal
 281  * instruction detected will be given a size of zero, which is a
 282  * signal to abort the rest of the buffer.
 283  */
 284 static int do_validate_cmd(int cmd)
 285 {
 286         switch (((cmd >> 29) & 0x7)) {
 287         case 0x0:
 288                 switch ((cmd >> 23) & 0x3f) {
 289                 case 0x0:
 290                         return 1;       /* MI_NOOP */
 291                 case 0x4:
 292                         return 1;       /* MI_FLUSH */
 293                 default:
 294                         return 0;       /* disallow everything else */
 295                 }
 296                 break;
 297         case 0x1:
 298                 return 0;       /* reserved */
 299         case 0x2:
 300                 return (cmd & 0xff) + 2;        /* 2d commands */
 301         case 0x3:
 302                 if (((cmd >> 24) & 0x1f) <= 0x18)
 303                         return 1;
 304
 305                 switch ((cmd >> 24) & 0x1f) {
 306                 case 0x1c:
 307                         return 1;
 308                 case 0x1d:
 309                         switch ((cmd >> 16) & 0xff) {
 310                         case 0x3:
 311                                 return (cmd & 0x1f) + 2;
 312                         case 0x4:
 313                                 return (cmd & 0xf) + 2;
 314                         default:
 315                                 return (cmd & 0xffff) + 2;
 316                         }
 317                 case 0x1e:
 318                         if (cmd & (1 << 23))
 319                                 return (cmd & 0xffff) + 1;
 320                         else
 321                                 return 1;
 322                 case 0x1f:
 323                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 324                                 return (cmd & 0x1ffff) + 2;
 325                         else if (cmd & (1 << 17))       /* indirect random */
 326                                 if ((cmd & 0xffff) == 0)
 327                                         return 0;       /* unknown length, too hard */
 328                                 else
 329                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 330                         else
 331                                 return 2;       /* indirect sequential */
 332                 default:
 333                         return 0;
 334                 }
 335         default:
 336                 return 0;
 337         }
 338
 339         return 0;
 340 }
 341
 342 static int validate_cmd(int cmd)
 343 {
 344         int ret = do_validate_cmd(cmd);
 345
 346 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 347
 348         return ret;
 349 }
 350
 351 static int i915_emit_cmds(struct drm_device *dev, int __user *buffer,
 352                           int dwords)
 353 {
 354         drm_i915_private_t *dev_priv = dev->dev_private;
 355         int i;
 356         RING_LOCALS;
 357
 358         if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
 359                 return -EINVAL;
 360
 361         BEGIN_LP_RING((dwords+1)&~1);
 362
 363         for (i = 0; i < dwords;) {
 364                 int cmd, sz;
 365
 366                 if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i], sizeof(cmd)))
 367                         return -EINVAL;
 368
 369                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 370                         return -EINVAL;
 371
 372                 OUT_RING(cmd);
 373
 374                 while (++i, --sz) {
 375                         if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i],
 376                                                          sizeof(cmd))) {
 377                                 return -EINVAL;
 378                         }
 379                         OUT_RING(cmd);
 380                 }
 381         }
 382
 383         if (dwords & 1)
 384                 OUT_RING(0);
 385
 386         ADVANCE_LP_RING();
 387
 388         return 0;
 389 }
 390
 391 int i915_emit_box(struct drm_device * dev,
 392                   struct drm_clip_rect __user * boxes,
 393                   int i, int DR1, int DR4)
 394 {
 395         drm_i915_private_t *dev_priv = dev->dev_private;
 396         struct drm_clip_rect box;
 397         RING_LOCALS;
 398
 399         if (DRM_COPY_FROM_USER_UNCHECKED(&box, &boxes[i], sizeof(box))) {
 400                 return -EFAULT;
 401         }
 402
 403         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 404                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 405                           box.x1, box.y1, box.x2, box.y2);
 406                 return -EINVAL;
 407         }
 408
 409         if (IS_I965G(dev)) {
 410                 BEGIN_LP_RING(4);
 411                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 412                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 413                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 414                 OUT_RING(DR4);
 415                 ADVANCE_LP_RING();
 416         } else {
 417                 BEGIN_LP_RING(6);
 418                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 419                 OUT_RING(DR1);
 420                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 421                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 422                 OUT_RING(DR4);
 423                 OUT_RING(0);
 424                 ADVANCE_LP_RING();
 425         }
 426
 427         return 0;
 428 }
 429
 430 /* XXX: Emitting the counter should really be moved to part of the IRQ
 431  * emit. For now, do it in both places:
 432  */
 433
 434 static void i915_emit_breadcrumb(struct drm_device *dev)
 435 {
 436         drm_i915_private_t *dev_priv = dev->dev_private;
 437         RING_LOCALS;
 438
 439         if (++dev_priv->counter > 0x7FFFFFFFUL)
 440                 dev_priv->counter = 0;
 441         if (dev_priv->sarea_priv)
 442                 dev_priv->sarea_priv->last_enqueue = dev_priv->counter;
 443
 444         BEGIN_LP_RING(4);
 445         OUT_RING(MI_STORE_DWORD_INDEX);
 446         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 447         OUT_RING(dev_priv->counter);
 448         OUT_RING(0);
 449         ADVANCE_LP_RING();
 450 }
 451
 452 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 453                                    drm_i915_cmdbuffer_t * cmd)
 454 {
 455         int nbox = cmd->num_cliprects;
 456         int i = 0, count, ret;
 457
 458         if (cmd->sz & 0x3) {
 459                 DRM_ERROR("alignment\n");
 460                 return -EINVAL;
 461         }
 462
 463         i915_kernel_lost_context(dev);
 464
 465         count = nbox ? nbox : 1;
 466
 467         for (i = 0; i < count; i++) {
 468                 if (i < nbox) {
 469                         ret = i915_emit_box(dev, cmd->cliprects, i,
 470                                             cmd->DR1, cmd->DR4);
 471                         if (ret)
 472                                 return ret;
 473                 }
 474
 475                 ret = i915_emit_cmds(dev, (int __user *)cmd->buf, cmd->sz / 4);
 476                 if (ret)
 477                         return ret;
 478         }
 479
 480         i915_emit_breadcrumb(dev);
 481         return 0;
 482 }
 483
 484 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 485                                      drm_i915_batchbuffer_t * batch)
 486 {
 487         drm_i915_private_t *dev_priv = dev->dev_private;
 488         struct drm_clip_rect __user *boxes = batch->cliprects;
 489         int nbox = batch->num_cliprects;
 490         int i = 0, count;
 491         RING_LOCALS;
 492
 493         if ((batch->start | batch->used) & 0x7) {
 494                 DRM_ERROR("alignment\n");
 495                 return -EINVAL;
 496         }
 497
 498         i915_kernel_lost_context(dev);
 499
 500         count = nbox ? nbox : 1;
 501
 502         for (i = 0; i < count; i++) {
 503                 if (i < nbox) {
 504                         int ret = i915_emit_box(dev, boxes, i,
 505                                                 batch->DR1, batch->DR4);
 506                         if (ret)
 507                                 return ret;
 508                 }
 509
 510                 if (!IS_I830(dev) && !IS_845G(dev)) {
 511                         BEGIN_LP_RING(2);
 512                         if (IS_I965G(dev)) {
 513                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 514                                 OUT_RING(batch->start);
 515                         } else {
 516                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 517                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 518                         }
 519                         ADVANCE_LP_RING();
 520                 } else {
 521                         BEGIN_LP_RING(4);
 522                         OUT_RING(MI_BATCH_BUFFER);
 523                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 524                         OUT_RING(batch->start + batch->used - 4);
 525                         OUT_RING(0);
 526                         ADVANCE_LP_RING();
 527                 }
 528         }
 529
 530         i915_emit_breadcrumb(dev);
 531
 532         return 0;
 533 }
 534
 535 static int i915_dispatch_flip(struct drm_device * dev)
 536 {
 537         drm_i915_private_t *dev_priv = dev->dev_private;
 538         RING_LOCALS;
 539
 540         if (!dev_priv->sarea_priv)
 541                 return -EINVAL;
 542
 543         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
 544                   __func__,
 545                   dev_priv->current_page,
 546                   dev_priv->sarea_priv->pf_current_page);
 547
 548         i915_kernel_lost_context(dev);
 549
 550         BEGIN_LP_RING(2);
 551         OUT_RING(MI_FLUSH | MI_READ_FLUSH);
 552         OUT_RING(0);
 553         ADVANCE_LP_RING();
 554
 555         BEGIN_LP_RING(6);
 556         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 557         OUT_RING(0);
 558         if (dev_priv->current_page == 0) {
 559                 OUT_RING(dev_priv->back_offset);
 560                 dev_priv->current_page = 1;
 561         } else {
 562                 OUT_RING(dev_priv->front_offset);
 563                 dev_priv->current_page = 0;
 564         }
 565         OUT_RING(0);
 566         ADVANCE_LP_RING();
 567
 568         BEGIN_LP_RING(2);
 569         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 570         OUT_RING(0);
 571         ADVANCE_LP_RING();
 572
 573         if (++dev_priv->counter > 0x7FFFFFFFUL)
 574                 dev_priv->counter = 0;
 575         if (dev_priv->sarea_priv)
 576                 dev_priv->sarea_priv->last_enqueue = dev_priv->counter;
 577
 578         BEGIN_LP_RING(4);
 579         OUT_RING(MI_STORE_DWORD_INDEX);
 580         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 581         OUT_RING(dev_priv->counter);
 582         OUT_RING(0);
 583         ADVANCE_LP_RING();
 584
 585         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 586         return 0;
 587 }
 588
 589 static int i915_quiescent(struct drm_device * dev)
 590 {
 591         drm_i915_private_t *dev_priv = dev->dev_private;
 592
 593         i915_kernel_lost_context(dev);
 594         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __func__);
 595 }
 596
 597 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 598                             struct drm_file *file_priv)
 599 {
 600         int ret;
 601
 602         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 603
 604         ret = i915_quiescent(dev);
 605
 606         return ret;
 607 }
 608
 609 static int i915_batchbuffer(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         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 614             dev_priv->sarea_priv;
 615         drm_i915_batchbuffer_t *batch = data;
 616         size_t cliplen;
 617         int ret;
 618
 619         if (!dev_priv->allow_batchbuffer) {
 620                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 621                 return -EINVAL;
 622         }
 623
 624         DRM_DEBUG("i915 batchbuffer, start %x used %d cliprects %d\n",
 625                   batch->start, batch->used, batch->num_cliprects);
 626
 627         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 628
 629         DRM_UNLOCK();
 630         cliplen = batch->num_cliprects * sizeof(struct drm_clip_rect);
 631         if (batch->num_cliprects && DRM_VERIFYAREA_READ(batch->cliprects,
 632             cliplen)) {
 633                 DRM_LOCK();
 634                 return -EFAULT;
 635         }
 636         if (batch->num_cliprects) {
 637                 vslock((caddr_t)batch->cliprects, cliplen);
 638         }
 639
 640         ret = i915_dispatch_batchbuffer(dev, batch);
 641
 642         if (batch->num_cliprects)
 643                 vsunlock((caddr_t)batch->cliprects, cliplen);
 644
 645         if (sarea_priv)
 646                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 647
 648         DRM_LOCK();
 649         return ret;
 650 }
 651
 652 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 653                           struct drm_file *file_priv)
 654 {
 655         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 656         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 657             dev_priv->sarea_priv;
 658         drm_i915_cmdbuffer_t *cmdbuf = data;
 659         size_t cliplen;
 660         int ret;
 661
 662         DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 663                   cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 664
 665         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 666
 667         DRM_UNLOCK();
 668         cliplen = cmdbuf->num_cliprects * sizeof(struct drm_clip_rect);
 669         if (cmdbuf->num_cliprects && DRM_VERIFYAREA_READ(cmdbuf->cliprects,
 670             cliplen)) {
 671                 DRM_ERROR("Fault accessing cliprects\n");
 672                 DRM_LOCK();
 673                 return -EFAULT;
 674         }
 675         if (cmdbuf->num_cliprects) {
 676                 vslock((caddr_t)cmdbuf->cliprects, cliplen);
 677                 vslock((caddr_t)cmdbuf->buf, cmdbuf->sz);
 678         }
 679
 680         ret = i915_dispatch_cmdbuffer(dev, cmdbuf);
 681
 682         if (cmdbuf->num_cliprects) {
 683                 vsunlock((caddr_t)cmdbuf->buf, cmdbuf->sz);
 684                 vsunlock((caddr_t)cmdbuf->cliprects, cliplen);
 685         }
 686         DRM_LOCK();
 687         if (ret) {
 688                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 689                 return ret;
 690         }
 691
 692         if (sarea_priv)
 693                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 694         return 0;
 695 }
 696
 697 static int i915_flip_bufs(struct drm_device *dev, void *data,
 698                           struct drm_file *file_priv)
 699 {
 700         int ret;
 701
 702         DRM_DEBUG("%s\n", __func__);
 703
 704         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 705
 706         ret = i915_dispatch_flip(dev);
 707
 708         return ret;
 709 }
 710
 711 static int i915_getparam(struct drm_device *dev, void *data,
 712                          struct drm_file *file_priv)
 713 {
 714         drm_i915_private_t *dev_priv = dev->dev_private;
 715         drm_i915_getparam_t *param = data;
 716         int value;
 717
 718         if (!dev_priv) {
 719                 DRM_ERROR("called with no initialization\n");
 720                 return -EINVAL;
 721         }
 722
 723         switch (param->param) {
 724         case I915_PARAM_IRQ_ACTIVE:
 725                 value = dev->irq_enabled ? 1 : 0;
 726                 break;
 727         case I915_PARAM_ALLOW_BATCHBUFFER:
 728                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 729                 break;
 730         case I915_PARAM_LAST_DISPATCH:
 731                 value = READ_BREADCRUMB(dev_priv);
 732                 break;
 733         case I915_PARAM_CHIPSET_ID:
 734                 value = dev->pci_device;
 735                 break;
 736         case I915_PARAM_HAS_GEM:
 737                 /* We need to reset this to 1 once we have GEM */
 738                 value = 0;
 739                 break;
 740         default:
 741                 DRM_DEBUG("Unknown parameter %d\n", param->param);
 742                 return -EINVAL;
 743         }
 744
 745         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
 746                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 747                 return -EFAULT;
 748         }
 749
 750         return 0;
 751 }
 752
 753 static int i915_setparam(struct drm_device *dev, void *data,
 754                          struct drm_file *file_priv)
 755 {
 756         drm_i915_private_t *dev_priv = dev->dev_private;
 757         drm_i915_setparam_t *param = data;
 758
 759         if (!dev_priv) {
 760                 DRM_ERROR("called with no initialization\n");
 761                 return -EINVAL;
 762         }
 763
 764         switch (param->param) {
 765         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 766                 break;
 767         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 768                 dev_priv->tex_lru_log_granularity = param->value;
 769                 break;
 770         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 771                 dev_priv->allow_batchbuffer = param->value;
 772                 break;
 773         default:
 774                 DRM_DEBUG("unknown parameter %d\n", param->param);
 775                 return -EINVAL;
 776         }
 777
 778         return 0;
 779 }
 780
 781 static int i915_set_status_page(struct drm_device *dev, void *data,
 782                                 struct drm_file *file_priv)
 783 {
 784         drm_i915_private_t *dev_priv = dev->dev_private;
 785         drm_i915_hws_addr_t *hws = data;
 786
 787         if (!I915_NEED_GFX_HWS(dev))
 788                 return -EINVAL;
 789
 790         if (!dev_priv) {
 791                 DRM_ERROR("called with no initialization\n");
 792                 return -EINVAL;
 793         }
 794
 795         DRM_DEBUG("set status page addr 0x%08x\n", (u32)hws->addr);
 796
 797         dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
 798
 799         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 800         dev_priv->hws_map.size = 4*1024;
 801         dev_priv->hws_map.type = 0;
 802         dev_priv->hws_map.flags = 0;
 803         dev_priv->hws_map.mtrr = 0;
 804
 805         drm_core_ioremap_wc(&dev_priv->hws_map, dev);
 806         if (dev_priv->hws_map.handle == NULL) {
 807                 i915_dma_cleanup(dev);
 808                 dev_priv->status_gfx_addr = 0;
 809                 DRM_ERROR("can not ioremap virtual address for"
 810                                 " G33 hw status page\n");
 811                 return -ENOMEM;
 812         }
 813         dev_priv->hw_status_page = dev_priv->hws_map.handle;
 814
 815         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 816         I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 817         DRM_DEBUG("load hws HWS_PGA with gfx mem 0x%x\n",
 818                         dev_priv->status_gfx_addr);
 819         DRM_DEBUG("load hws at %p\n", dev_priv->hw_status_page);
 820         return 0;
 821 }
 822
 823 int i915_driver_load(struct drm_device *dev, unsigned long flags)
 824 {
 825         struct drm_i915_private *dev_priv = dev->dev_private;
 826         unsigned long base, size;
 827         int ret = 0, mmio_bar = IS_I9XX(dev) ? 0 : 1;
 828
 829         /* i915 has 4 more counters */
 830         dev->counters += 4;
 831         dev->types[6] = _DRM_STAT_IRQ;
 832         dev->types[7] = _DRM_STAT_PRIMARY;
 833         dev->types[8] = _DRM_STAT_SECONDARY;
 834         dev->types[9] = _DRM_STAT_DMA;
 835
 836         dev_priv = drm_alloc(sizeof(drm_i915_private_t), DRM_MEM_DRIVER);
 837         if (dev_priv == NULL)
 838                 return -ENOMEM;
 839
 840         memset(dev_priv, 0, sizeof(drm_i915_private_t));
 841
 842         dev->dev_private = (void *)dev_priv;
 843         dev_priv->dev = dev;
 844
 845         /* Add register map (needed for suspend/resume) */
 846         base = drm_get_resource_start(dev, mmio_bar);
 847         size = drm_get_resource_len(dev, mmio_bar);
 848
 849         ret = drm_addmap(dev, base, size, _DRM_REGISTERS,
 850             _DRM_KERNEL | _DRM_DRIVER, &dev_priv->mmio_map);
 851
 852         if (IS_G4X(dev)) {
 853                 dev->driver->get_vblank_counter = g45_get_vblank_counter;
 854                 dev->max_vblank_count = 0xffffffff; /* 32 bits of frame count */
 855         } else {
 856                 dev->driver->get_vblank_counter = i915_get_vblank_counter;
 857                 dev->max_vblank_count = 0x00ffffff; /* 24 bits of frame count */
 858         }
 859
 860 #ifdef I915_HAVE_GEM
 861         i915_gem_load(dev);
 862 #endif
 863         /* Init HWS */
 864         if (!I915_NEED_GFX_HWS(dev)) {
 865                 ret = i915_init_phys_hws(dev);
 866                 if (ret != 0) {
 867                         drm_rmmap(dev, dev_priv->mmio_map);
 868                         drm_free(dev_priv, sizeof(struct drm_i915_private),
 869                             DRM_MEM_DRIVER);
 870                         return ret;
 871                 }
 872         }
 873 #ifdef __linux__
 874         /* On the 945G/GM, the chipset reports the MSI capability on the
 875          * integrated graphics even though the support isn't actually there
 876          * according to the published specs.  It doesn't appear to function
 877          * correctly in testing on 945G.
 878          * This may be a side effect of MSI having been made available for PEG
 879          * and the registers being closely associated.
 880          *
 881          * According to chipset errata, on the 965GM, MSI interrupts may
 882          * be lost or delayed
 883          */
 884         if (!IS_I945G(dev) && !IS_I945GM(dev) && !IS_I965GM(dev))
 885                 if (pci_enable_msi(dev->pdev))
 886                         DRM_ERROR("failed to enable MSI\n");
 887
 888         intel_opregion_init(dev);
 889 #endif
 890         DRM_SPININIT(&dev_priv->user_irq_lock, "userirq");
 891         dev_priv->user_irq_refcount = 0;
 892
 893         ret = drm_vblank_init(dev, I915_NUM_PIPE);
 894
 895         if (ret) {
 896                 (void) i915_driver_unload(dev);
 897                 return ret;
 898         }
 899
 900         return ret;
 901 }
 902
 903 int i915_driver_unload(struct drm_device *dev)
 904 {
 905         struct drm_i915_private *dev_priv = dev->dev_private;
 906
 907         i915_free_hws(dev);
 908
 909         drm_rmmap(dev, dev_priv->mmio_map);
 910 #ifdef __linux__
 911         intel_opregion_free(dev);
 912 #endif
 913         DRM_SPINUNINIT(&dev_priv->user_irq_lock);
 914
 915         drm_free(dev->dev_private, sizeof(drm_i915_private_t),
 916                  DRM_MEM_DRIVER);
 917
 918         return 0;
 919 }
 920
 921 int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv)
 922 {
 923         struct drm_i915_file_private *i915_file_priv;
 924
 925         DRM_DEBUG("\n");
 926         i915_file_priv = (struct drm_i915_file_private *)
 927             drm_alloc(sizeof(*i915_file_priv), DRM_MEM_FILES);
 928
 929         if (!i915_file_priv)
 930                 return -ENOMEM;
 931
 932         file_priv->driver_priv = i915_file_priv;
 933
 934         i915_file_priv->mm.last_gem_seqno = 0;
 935         i915_file_priv->mm.last_gem_throttle_seqno = 0;
 936
 937         return 0;
 938 }
 939
 940 void i915_driver_lastclose(struct drm_device * dev)
 941 {
 942         drm_i915_private_t *dev_priv = dev->dev_private;
 943
 944         if (!dev_priv)
 945                 return;
 946 #ifdef I915_HAVE_GEM
 947         i915_gem_lastclose(dev);
 948 #endif
 949         if (dev_priv->agp_heap)
 950                 i915_mem_takedown(&(dev_priv->agp_heap));
 951
 952         i915_dma_cleanup(dev);
 953 }
 954
 955 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
 956 {
 957         drm_i915_private_t *dev_priv = dev->dev_private;
 958         i915_mem_release(dev, file_priv, dev_priv->agp_heap);
 959 }
 960
 961 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file_priv)
 962 {
 963         struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv;
 964
 965         drm_free(i915_file_priv, sizeof(*i915_file_priv), DRM_MEM_FILES);
 966 }
 967
 968 struct drm_ioctl_desc i915_ioctls[] = {
 969         DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 970         DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
 971         DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH),
 972         DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
 973         DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
 974         DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
 975         DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH),
 976         DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 977         DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH),
 978         DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH),
 979         DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 980         DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
 981         DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
 982         DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
 983         DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH ),
 984         DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
 985         DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 986 #ifdef I915_HAVE_GEM
 987         DRM_IOCTL_DEF(DRM_I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 988         DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH),
 989         DRM_IOCTL_DEF(DRM_I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
 990         DRM_IOCTL_DEF(DRM_I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
 991         DRM_IOCTL_DEF(DRM_I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH),
 992         DRM_IOCTL_DEF(DRM_I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH),
 993         DRM_IOCTL_DEF(DRM_I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 994         DRM_IOCTL_DEF(DRM_I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 995         DRM_IOCTL_DEF(DRM_I915_GEM_CREATE, i915_gem_create_ioctl, 0),
 996         DRM_IOCTL_DEF(DRM_I915_GEM_PREAD, i915_gem_pread_ioctl, 0),
 997         DRM_IOCTL_DEF(DRM_I915_GEM_PWRITE, i915_gem_pwrite_ioctl, 0),
 998         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP, i915_gem_mmap_ioctl, 0),
 999         DRM_IOCTL_DEF(DRM_I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, 0),
1000         DRM_IOCTL_DEF(DRM_I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, 0),
1001         DRM_IOCTL_DEF(DRM_I915_GEM_SET_TILING, i915_gem_set_tiling, 0),
1002         DRM_IOCTL_DEF(DRM_I915_GEM_GET_TILING, i915_gem_get_tiling, 0),
1003 #endif
1004 };
1005
1006 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
1007
1008 /**
1009  * Determine if the device really is AGP or not.
1010  *
1011  * All Intel graphics chipsets are treated as AGP, even if they are really
1012  * PCI-e.
1013  *
1014  * \param dev   The device to be tested.
1015  *
1016  * \returns
1017  * A value of 1 is always retured to indictate every i9x5 is AGP.
1018  */
1019 int i915_driver_device_is_agp(struct drm_device * dev)
1020 {
1021         return 1;
1022 }