shared-core/i915_dma.c

   1 /* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
   2  */
   3 /*
   4  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  */
  28
  29 #include "drmP.h"
  30 #include "drm.h"
  31 #include "i915_drm.h"
  32 #include "i915_drv.h"
  33
  34 #define IS_I965G(dev)  (dev->pci_device == 0x2972 || \
  35                         dev->pci_device == 0x2982 || \
  36                         dev->pci_device == 0x2992 || \
  37                         dev->pci_device == 0x29A2 || \
  38                         dev->pci_device == 0x2A02)
  39
  40
  41 /* Really want an OS-independent resettable timer.  Would like to have
  42  * this loop run for (eg) 3 sec, but have the timer reset every time
  43  * the head pointer changes, so that EBUSY only happens if the ring
  44  * actually stalls for (eg) 3 seconds.
  45  */
  46 int i915_wait_ring(drm_device_t * dev, int n, const char *caller)
  47 {
  48         drm_i915_private_t *dev_priv = dev->dev_private;
  49         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  50         u32 last_head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  51         int i;
  52
  53         for (i = 0; i < 10000; i++) {
  54                 ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  55                 ring->space = ring->head - (ring->tail + 8);
  56                 if (ring->space < 0)
  57                         ring->space += ring->Size;
  58                 if (ring->space >= n)
  59                         return 0;
  60
  61                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
  62
  63                 if (ring->head != last_head)
  64                         i = 0;
  65
  66                 last_head = ring->head;
  67                 DRM_UDELAY(1);
  68         }
  69
  70         return DRM_ERR(EBUSY);
  71 }
  72
  73 void i915_kernel_lost_context(drm_device_t * dev)
  74 {
  75         drm_i915_private_t *dev_priv = dev->dev_private;
  76         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  77
  78         ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
  79         ring->tail = I915_READ(LP_RING + RING_TAIL) & TAIL_ADDR;
  80         ring->space = ring->head - (ring->tail + 8);
  81         if (ring->space < 0)
  82                 ring->space += ring->Size;
  83
  84         if (ring->head == ring->tail)
  85                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
  86 }
  87
  88 static int i915_dma_cleanup(drm_device_t * dev)
  89 {
  90         /* Make sure interrupts are disabled here because the uninstall ioctl
  91          * may not have been called from userspace and after dev_private
  92          * is freed, it's too late.
  93          */
  94         if (dev->irq)
  95                 drm_irq_uninstall(dev);
  96
  97         if (dev->dev_private) {
  98                 drm_i915_private_t *dev_priv =
  99                     (drm_i915_private_t *) dev->dev_private;
 100
 101                 if (dev_priv->ring.virtual_start) {
 102                         drm_core_ioremapfree(&dev_priv->ring.map, dev);
 103                 }
 104
 105                 if (dev_priv->status_page_dmah) {
 106                         drm_pci_free(dev, dev_priv->status_page_dmah);
 107                         /* Need to rewrite hardware status page */
 108                         I915_WRITE(0x02080, 0x1ffff000);
 109                 }
 110
 111                 drm_free(dev->dev_private, sizeof(drm_i915_private_t),
 112                          DRM_MEM_DRIVER);
 113
 114                 dev->dev_private = NULL;
 115         }
 116
 117         return 0;
 118 }
 119
 120 static int i915_initialize(drm_device_t * dev,
 121                            drm_i915_private_t * dev_priv,
 122                            drm_i915_init_t * init)
 123 {
 124         memset(dev_priv, 0, sizeof(drm_i915_private_t));
 125
 126         DRM_GETSAREA();
 127         if (!dev_priv->sarea) {
 128                 DRM_ERROR("can not find sarea!\n");
 129                 dev->dev_private = (void *)dev_priv;
 130                 i915_dma_cleanup(dev);
 131                 return DRM_ERR(EINVAL);
 132         }
 133
 134         dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
 135         if (!dev_priv->mmio_map) {
 136                 dev->dev_private = (void *)dev_priv;
 137                 i915_dma_cleanup(dev);
 138                 DRM_ERROR("can not find mmio map!\n");
 139                 return DRM_ERR(EINVAL);
 140         }
 141
 142         dev_priv->sarea_priv = (drm_i915_sarea_t *)
 143             ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);
 144
 145         dev_priv->ring.Start = init->ring_start;
 146         dev_priv->ring.End = init->ring_end;
 147         dev_priv->ring.Size = init->ring_size;
 148         dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 149
 150         dev_priv->ring.map.offset = init->ring_start;
 151         dev_priv->ring.map.size = init->ring_size;
 152         dev_priv->ring.map.type = 0;
 153         dev_priv->ring.map.flags = 0;
 154         dev_priv->ring.map.mtrr = 0;
 155
 156         drm_core_ioremap(&dev_priv->ring.map, dev);
 157
 158         if (dev_priv->ring.map.handle == NULL) {
 159                 dev->dev_private = (void *)dev_priv;
 160                 i915_dma_cleanup(dev);
 161                 DRM_ERROR("can not ioremap virtual address for"
 162                           " ring buffer\n");
 163                 return DRM_ERR(ENOMEM);
 164         }
 165
 166         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 167
 168         dev_priv->cpp = init->cpp;
 169         dev_priv->sarea_priv->pf_current_page = 0;
 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         dev->dev_private = (void *)dev_priv;
 199 #ifdef I915_HAVE_BUFFER
 200         drm_bo_driver_init(dev);
 201 #endif
 202         return 0;
 203 }
 204
 205 static int i915_dma_resume(drm_device_t * dev)
 206 {
 207         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 208
 209         DRM_DEBUG("%s\n", __FUNCTION__);
 210
 211         if (!dev_priv->sarea) {
 212                 DRM_ERROR("can not find sarea!\n");
 213                 return DRM_ERR(EINVAL);
 214         }
 215
 216         if (!dev_priv->mmio_map) {
 217                 DRM_ERROR("can not find mmio map!\n");
 218                 return DRM_ERR(EINVAL);
 219         }
 220
 221         if (dev_priv->ring.map.handle == NULL) {
 222                 DRM_ERROR("can not ioremap virtual address for"
 223                           " ring buffer\n");
 224                 return DRM_ERR(ENOMEM);
 225         }
 226
 227         /* Program Hardware Status Page */
 228         if (!dev_priv->hw_status_page) {
 229                 DRM_ERROR("Can not find hardware status page\n");
 230                 return DRM_ERR(EINVAL);
 231         }
 232         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 233
 234         I915_WRITE(0x02080, dev_priv->dma_status_page);
 235         DRM_DEBUG("Enabled hardware status page\n");
 236
 237         return 0;
 238 }
 239
 240 static int i915_dma_init(DRM_IOCTL_ARGS)
 241 {
 242         DRM_DEVICE;
 243         drm_i915_private_t *dev_priv;
 244         drm_i915_init_t init;
 245         int retcode = 0;
 246
 247         DRM_COPY_FROM_USER_IOCTL(init, (drm_i915_init_t __user *) data,
 248                                  sizeof(init));
 249
 250         switch (init.func) {
 251         case I915_INIT_DMA:
 252                 dev_priv = drm_alloc(sizeof(drm_i915_private_t),
 253                                      DRM_MEM_DRIVER);
 254                 if (dev_priv == NULL)
 255                         return DRM_ERR(ENOMEM);
 256                 retcode = i915_initialize(dev, dev_priv, &init);
 257                 break;
 258         case I915_CLEANUP_DMA:
 259                 retcode = i915_dma_cleanup(dev);
 260                 break;
 261         case I915_RESUME_DMA:
 262                 retcode = i915_dma_resume(dev);
 263                 break;
 264         default:
 265                 retcode = DRM_ERR(EINVAL);
 266                 break;
 267         }
 268
 269         return retcode;
 270 }
 271
 272 /* Implement basically the same security restrictions as hardware does
 273  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 274  *
 275  * Most of the calculations below involve calculating the size of a
 276  * particular instruction.  It's important to get the size right as
 277  * that tells us where the next instruction to check is.  Any illegal
 278  * instruction detected will be given a size of zero, which is a
 279  * signal to abort the rest of the buffer.
 280  */
 281 static int do_validate_cmd(int cmd)
 282 {
 283         switch (((cmd >> 29) & 0x7)) {
 284         case 0x0:
 285                 switch ((cmd >> 23) & 0x3f) {
 286                 case 0x0:
 287                         return 1;       /* MI_NOOP */
 288                 case 0x4:
 289                         return 1;       /* MI_FLUSH */
 290                 default:
 291                         return 0;       /* disallow everything else */
 292                 }
 293                 break;
 294         case 0x1:
 295                 return 0;       /* reserved */
 296         case 0x2:
 297                 return (cmd & 0xff) + 2;        /* 2d commands */
 298         case 0x3:
 299                 if (((cmd >> 24) & 0x1f) <= 0x18)
 300                         return 1;
 301
 302                 switch ((cmd >> 24) & 0x1f) {
 303                 case 0x1c:
 304                         return 1;
 305                 case 0x1d:
 306                         switch ((cmd >> 16) & 0xff) {
 307                         case 0x3:
 308                                 return (cmd & 0x1f) + 2;
 309                         case 0x4:
 310                                 return (cmd & 0xf) + 2;
 311                         default:
 312                                 return (cmd & 0xffff) + 2;
 313                         }
 314                 case 0x1e:
 315                         if (cmd & (1 << 23))
 316                                 return (cmd & 0xffff) + 1;
 317                         else
 318                                 return 1;
 319                 case 0x1f:
 320                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 321                                 return (cmd & 0x1ffff) + 2;
 322                         else if (cmd & (1 << 17))       /* indirect random */
 323                                 if ((cmd & 0xffff) == 0)
 324                                         return 0;       /* unknown length, too hard */
 325                                 else
 326                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 327                         else
 328                                 return 2;       /* indirect sequential */
 329                 default:
 330                         return 0;
 331                 }
 332         default:
 333                 return 0;
 334         }
 335
 336         return 0;
 337 }
 338
 339 static int validate_cmd(int cmd)
 340 {
 341         int ret = do_validate_cmd(cmd);
 342
 343 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 344
 345         return ret;
 346 }
 347
 348 static int i915_emit_cmds(drm_device_t * dev, int __user * buffer, int dwords)
 349 {
 350         drm_i915_private_t *dev_priv = dev->dev_private;
 351         int i;
 352         RING_LOCALS;
 353
 354         if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
 355                 return DRM_ERR(EINVAL);
 356
 357         BEGIN_LP_RING((dwords+1)&~1);
 358
 359         for (i = 0; i < dwords;) {
 360                 int cmd, sz;
 361
 362                 if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i], sizeof(cmd)))
 363                         return DRM_ERR(EINVAL);
 364
 365                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 366                         return DRM_ERR(EINVAL);
 367
 368                 OUT_RING(cmd);
 369
 370                 while (++i, --sz) {
 371                         if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i],
 372                                                          sizeof(cmd))) {
 373                                 return DRM_ERR(EINVAL);
 374                         }
 375                         OUT_RING(cmd);
 376                 }
 377         }
 378
 379         if (dwords & 1)
 380                 OUT_RING(0);
 381
 382         ADVANCE_LP_RING();
 383
 384         return 0;
 385 }
 386
 387 static int i915_emit_box(drm_device_t * dev,
 388                          drm_clip_rect_t __user * boxes,
 389                          int i, int DR1, int DR4)
 390 {
 391         drm_i915_private_t *dev_priv = dev->dev_private;
 392         drm_clip_rect_t box;
 393         RING_LOCALS;
 394
 395         if (DRM_COPY_FROM_USER_UNCHECKED(&box, &boxes[i], sizeof(box))) {
 396                 return DRM_ERR(EFAULT);
 397         }
 398
 399         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 400                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 401                           box.x1, box.y1, box.x2, box.y2);
 402                 return DRM_ERR(EINVAL);
 403         }
 404
 405         if (IS_I965G(dev)) {
 406                 BEGIN_LP_RING(4);
 407                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 408                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 409                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 410                 OUT_RING(DR4);
 411                 ADVANCE_LP_RING();
 412         } else {
 413                 BEGIN_LP_RING(6);
 414                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 415                 OUT_RING(DR1);
 416                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 417                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 418                 OUT_RING(DR4);
 419                 OUT_RING(0);
 420                 ADVANCE_LP_RING();
 421         }
 422
 423         return 0;
 424 }
 425
 426 /* XXX: Emitting the counter should really be moved to part of the IRQ
 427  * emit.  For now, do it in both places:
 428  */
 429
 430 void i915_emit_breadcrumb(drm_device_t *dev)
 431 {
 432         drm_i915_private_t *dev_priv = dev->dev_private;
 433         RING_LOCALS;
 434
 435         dev_priv->sarea_priv->last_enqueue = ++dev_priv->counter;
 436
 437         if (dev_priv->counter > 0x7FFFFFFFUL)
 438                  dev_priv->sarea_priv->last_enqueue = dev_priv->counter = 1;
 439
 440         BEGIN_LP_RING(4);
 441         OUT_RING(CMD_STORE_DWORD_IDX);
 442         OUT_RING(20);
 443         OUT_RING(dev_priv->counter);
 444         OUT_RING(0);
 445         ADVANCE_LP_RING();
 446 }
 447
 448
 449 int i915_emit_mi_flush(drm_device_t *dev, uint32_t flush)
 450 {
 451         drm_i915_private_t *dev_priv = dev->dev_private;
 452         uint32_t flush_cmd = CMD_MI_FLUSH;
 453         RING_LOCALS;
 454
 455         flush_cmd |= flush;
 456
 457         i915_kernel_lost_context(dev);
 458
 459         BEGIN_LP_RING(4);
 460         OUT_RING(flush_cmd);
 461         OUT_RING(0);
 462         OUT_RING(0);
 463         OUT_RING(0);
 464         ADVANCE_LP_RING();
 465
 466         return 0;
 467 }
 468
 469
 470 static int i915_dispatch_cmdbuffer(drm_device_t * dev,
 471                                    drm_i915_cmdbuffer_t * cmd)
 472 {
 473         drm_i915_private_t *dev_priv = dev->dev_private;
 474         int nbox = cmd->num_cliprects;
 475         int i = 0, count, ret;
 476
 477         if (cmd->sz & 0x3) {
 478                 DRM_ERROR("alignment");
 479                 return DRM_ERR(EINVAL);
 480         }
 481
 482         i915_kernel_lost_context(dev);
 483
 484         count = nbox ? nbox : 1;
 485
 486         for (i = 0; i < count; i++) {
 487                 if (i < nbox) {
 488                         ret = i915_emit_box(dev, cmd->cliprects, i,
 489                                             cmd->DR1, cmd->DR4);
 490                         if (ret)
 491                                 return ret;
 492                 }
 493
 494                 ret = i915_emit_cmds(dev, (int __user *)cmd->buf, cmd->sz / 4);
 495                 if (ret)
 496                         return ret;
 497         }
 498
 499         i915_emit_breadcrumb( dev );
 500 #ifdef I915_HAVE_FENCE
 501         drm_fence_flush_old(dev, 0, dev_priv->counter);
 502 #endif
 503         return 0;
 504 }
 505
 506 static int i915_dispatch_batchbuffer(drm_device_t * dev,
 507                                      drm_i915_batchbuffer_t * batch)
 508 {
 509         drm_i915_private_t *dev_priv = dev->dev_private;
 510         drm_clip_rect_t __user *boxes = batch->cliprects;
 511         int nbox = batch->num_cliprects;
 512         int i = 0, count;
 513         RING_LOCALS;
 514
 515         if ((batch->start | batch->used) & 0x7) {
 516                 DRM_ERROR("alignment");
 517                 return DRM_ERR(EINVAL);
 518         }
 519
 520         i915_kernel_lost_context(dev);
 521
 522         count = nbox ? nbox : 1;
 523
 524         for (i = 0; i < count; i++) {
 525                 if (i < nbox) {
 526                         int ret = i915_emit_box(dev, boxes, i,
 527                                                 batch->DR1, batch->DR4);
 528                         if (ret)
 529                                 return ret;
 530                 }
 531
 532                 if (dev_priv->use_mi_batchbuffer_start) {
 533                         BEGIN_LP_RING(2);
 534                         OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 535                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 536                         ADVANCE_LP_RING();
 537                 } else {
 538                         BEGIN_LP_RING(4);
 539                         OUT_RING(MI_BATCH_BUFFER);
 540                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 541                         OUT_RING(batch->start + batch->used - 4);
 542                         OUT_RING(0);
 543                         ADVANCE_LP_RING();
 544                 }
 545         }
 546
 547         i915_emit_breadcrumb( dev );
 548 #ifdef I915_HAVE_FENCE
 549         drm_fence_flush_old(dev, 0, dev_priv->counter);
 550 #endif
 551         return 0;
 552 }
 553
 554 static void i915_do_dispatch_flip(drm_device_t * dev, int pipe, int sync)
 555 {
 556         drm_i915_private_t *dev_priv = dev->dev_private;
 557         u32 num_pages, current_page, next_page, dspbase;
 558         int shift = 2 * pipe, x, y;
 559         RING_LOCALS;
 560
 561         /* Calculate display base offset */
 562         num_pages = dev_priv->sarea_priv->third_handle ? 3 : 2;
 563         current_page = (dev_priv->sarea_priv->pf_current_page >> shift) & 0x3;
 564         next_page = (current_page + 1) % num_pages;
 565
 566         switch (next_page) {
 567         default:
 568         case 0:
 569                 dspbase = dev_priv->sarea_priv->front_offset;
 570                 break;
 571         case 1:
 572                 dspbase = dev_priv->sarea_priv->back_offset;
 573                 break;
 574         case 2:
 575                 dspbase = dev_priv->sarea_priv->third_offset;
 576                 break;
 577         }
 578
 579         if (pipe == 0) {
 580                 x = dev_priv->sarea_priv->pipeA_x;
 581                 y = dev_priv->sarea_priv->pipeA_y;
 582         } else {
 583                 x = dev_priv->sarea_priv->pipeB_x;
 584                 y = dev_priv->sarea_priv->pipeB_y;
 585         }
 586
 587         dspbase += (y * dev_priv->sarea_priv->pitch + x) * dev_priv->cpp;
 588
 589         DRM_DEBUG("pipe=%d current_page=%d dspbase=0x%x\n", pipe, current_page,
 590                   dspbase);
 591
 592         BEGIN_LP_RING(4);
 593         OUT_RING(sync ? 0 :
 594                  (MI_WAIT_FOR_EVENT | (pipe ? MI_WAIT_FOR_PLANE_B_FLIP :
 595                                        MI_WAIT_FOR_PLANE_A_FLIP)));
 596         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | (sync ? 0 : ASYNC_FLIP) |
 597                  (pipe ? DISPLAY_PLANE_B : DISPLAY_PLANE_A));
 598         OUT_RING(dev_priv->sarea_priv->pitch * dev_priv->cpp);
 599         OUT_RING(dspbase);
 600         ADVANCE_LP_RING();
 601
 602         dev_priv->sarea_priv->pf_current_page &= ~(0x3 << shift);
 603         dev_priv->sarea_priv->pf_current_page |= next_page << shift;
 604 }
 605
 606 void i915_dispatch_flip(drm_device_t * dev, int pipes, int sync)
 607 {
 608         drm_i915_private_t *dev_priv = dev->dev_private;
 609         int i;
 610
 611         DRM_DEBUG("%s: pipes=0x%x pfCurrentPage=%d\n",
 612                   __FUNCTION__,
 613                   pipes, dev_priv->sarea_priv->pf_current_page);
 614
 615         i915_emit_mi_flush(dev, MI_READ_FLUSH | MI_EXE_FLUSH);
 616
 617         for (i = 0; i < 2; i++)
 618                 if (pipes & (1 << i))
 619                         i915_do_dispatch_flip(dev, i, sync);
 620
 621         i915_emit_breadcrumb(dev);
 622 #ifdef I915_HAVE_FENCE
 623         if (!sync)
 624                 drm_fence_flush_old(dev, 0, dev_priv->counter);
 625 #endif
 626 }
 627
 628 static int i915_quiescent(drm_device_t * dev)
 629 {
 630         drm_i915_private_t *dev_priv = dev->dev_private;
 631
 632         i915_kernel_lost_context(dev);
 633         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __FUNCTION__);
 634 }
 635
 636 static int i915_flush_ioctl(DRM_IOCTL_ARGS)
 637 {
 638         DRM_DEVICE;
 639
 640         LOCK_TEST_WITH_RETURN(dev, filp);
 641
 642         return i915_quiescent(dev);
 643 }
 644
 645 static int i915_batchbuffer(DRM_IOCTL_ARGS)
 646 {
 647         DRM_DEVICE;
 648         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 649         u32 *hw_status = dev_priv->hw_status_page;
 650         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 651             dev_priv->sarea_priv;
 652         drm_i915_batchbuffer_t batch;
 653         int ret;
 654
 655         if (!dev_priv->allow_batchbuffer) {
 656                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 657                 return DRM_ERR(EINVAL);
 658         }
 659
 660         DRM_COPY_FROM_USER_IOCTL(batch, (drm_i915_batchbuffer_t __user *) data,
 661                                  sizeof(batch));
 662
 663         DRM_DEBUG("i915 batchbuffer, start %x used %d cliprects %d\n",
 664                   batch.start, batch.used, batch.num_cliprects);
 665
 666         LOCK_TEST_WITH_RETURN(dev, filp);
 667
 668         if (batch.num_cliprects && DRM_VERIFYAREA_READ(batch.cliprects,
 669                                                        batch.num_cliprects *
 670                                                        sizeof(drm_clip_rect_t)))
 671                 return DRM_ERR(EFAULT);
 672
 673         ret = i915_dispatch_batchbuffer(dev, &batch);
 674
 675         sarea_priv->last_dispatch = (int)hw_status[5];
 676         return ret;
 677 }
 678
 679 static int i915_cmdbuffer(DRM_IOCTL_ARGS)
 680 {
 681         DRM_DEVICE;
 682         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 683         u32 *hw_status = dev_priv->hw_status_page;
 684         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 685             dev_priv->sarea_priv;
 686         drm_i915_cmdbuffer_t cmdbuf;
 687         int ret;
 688
 689         DRM_COPY_FROM_USER_IOCTL(cmdbuf, (drm_i915_cmdbuffer_t __user *) data,
 690                                  sizeof(cmdbuf));
 691
 692         DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 693                   cmdbuf.buf, cmdbuf.sz, cmdbuf.num_cliprects);
 694
 695         LOCK_TEST_WITH_RETURN(dev, filp);
 696
 697         if (cmdbuf.num_cliprects &&
 698             DRM_VERIFYAREA_READ(cmdbuf.cliprects,
 699                                 cmdbuf.num_cliprects *
 700                                 sizeof(drm_clip_rect_t))) {
 701                 DRM_ERROR("Fault accessing cliprects\n");
 702                 return DRM_ERR(EFAULT);
 703         }
 704
 705         ret = i915_dispatch_cmdbuffer(dev, &cmdbuf);
 706         if (ret) {
 707                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 708                 return ret;
 709         }
 710
 711         sarea_priv->last_dispatch = (int)hw_status[5];
 712         return 0;
 713 }
 714
 715 static int i915_do_cleanup_pageflip(drm_device_t * dev)
 716 {
 717         drm_i915_private_t *dev_priv = dev->dev_private;
 718         int i, pipes, num_pages = dev_priv->sarea_priv->third_handle ? 3 : 2;
 719
 720         DRM_DEBUG("%s\n", __FUNCTION__);
 721
 722         for (i = 0, pipes = 0; i < 2; i++)
 723                 if (dev_priv->sarea_priv->pf_current_page & (0x3 << (2 * i))) {
 724                         dev_priv->sarea_priv->pf_current_page =
 725                                 (dev_priv->sarea_priv->pf_current_page &
 726                                  ~(0x3 << (2 * i))) | (num_pages - 1) << (2 * i);
 727
 728                         pipes |= 1 << i;
 729                 }
 730
 731         if (pipes)
 732                 i915_dispatch_flip(dev, pipes, 0);
 733
 734         return 0;
 735 }
 736
 737 static int i915_flip_bufs(DRM_IOCTL_ARGS)
 738 {
 739         DRM_DEVICE;
 740         drm_i915_flip_t param;
 741
 742         DRM_DEBUG("%s\n", __FUNCTION__);
 743
 744         LOCK_TEST_WITH_RETURN(dev, filp);
 745
 746         DRM_COPY_FROM_USER_IOCTL(param, (drm_i915_flip_t __user *) data,
 747                                  sizeof(param));
 748
 749         if (param.pipes & ~0x3) {
 750                 DRM_ERROR("Invalid pipes 0x%x, only <= 0x3 is valid\n",
 751                           param.pipes);
 752                 return DRM_ERR(EINVAL);
 753         }
 754
 755         i915_dispatch_flip(dev, param.pipes, 0);
 756
 757         return 0;
 758 }
 759
 760
 761 static int i915_getparam(DRM_IOCTL_ARGS)
 762 {
 763         DRM_DEVICE;
 764         drm_i915_private_t *dev_priv = dev->dev_private;
 765         drm_i915_getparam_t param;
 766         int value;
 767
 768         if (!dev_priv) {
 769                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
 770                 return DRM_ERR(EINVAL);
 771         }
 772
 773         DRM_COPY_FROM_USER_IOCTL(param, (drm_i915_getparam_t __user *) data,
 774                                  sizeof(param));
 775
 776         switch (param.param) {
 777         case I915_PARAM_IRQ_ACTIVE:
 778                 value = dev->irq ? 1 : 0;
 779                 break;
 780         case I915_PARAM_ALLOW_BATCHBUFFER:
 781                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 782                 break;
 783         case I915_PARAM_LAST_DISPATCH:
 784                 value = READ_BREADCRUMB(dev_priv);
 785                 break;
 786         default:
 787                 DRM_ERROR("Unknown parameter %d\n", param.param);
 788                 return DRM_ERR(EINVAL);
 789         }
 790
 791         if (DRM_COPY_TO_USER(param.value, &value, sizeof(int))) {
 792                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 793                 return DRM_ERR(EFAULT);
 794         }
 795
 796         return 0;
 797 }
 798
 799 static int i915_setparam(DRM_IOCTL_ARGS)
 800 {
 801         DRM_DEVICE;
 802         drm_i915_private_t *dev_priv = dev->dev_private;
 803         drm_i915_setparam_t param;
 804
 805         if (!dev_priv) {
 806                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
 807                 return DRM_ERR(EINVAL);
 808         }
 809
 810         DRM_COPY_FROM_USER_IOCTL(param, (drm_i915_setparam_t __user *) data,
 811                                  sizeof(param));
 812
 813         switch (param.param) {
 814         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 815                 dev_priv->use_mi_batchbuffer_start = param.value;
 816                 break;
 817         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 818                 dev_priv->tex_lru_log_granularity = param.value;
 819                 break;
 820         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 821                 dev_priv->allow_batchbuffer = param.value;
 822                 break;
 823         default:
 824                 DRM_ERROR("unknown parameter %d\n", param.param);
 825                 return DRM_ERR(EINVAL);
 826         }
 827
 828         return 0;
 829 }
 830
 831 drm_i915_mmio_entry_t mmio_table[] = {
 832         [MMIO_REGS_PS_DEPTH_COUNT] = {
 833                 I915_MMIO_MAY_READ|I915_MMIO_MAY_WRITE,
 834                 0x2350,
 835                 8
 836         }
 837 };
 838
 839 static int mmio_table_size = sizeof(mmio_table)/sizeof(drm_i915_mmio_entry_t);
 840
 841 static int i915_mmio(DRM_IOCTL_ARGS)
 842 {
 843         char buf[32];
 844         DRM_DEVICE;
 845         drm_i915_private_t *dev_priv = dev->dev_private;
 846         drm_i915_mmio_entry_t *e;
 847         drm_i915_mmio_t mmio;
 848         void __iomem *base;
 849         if (!dev_priv) {
 850                 DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
 851                 return DRM_ERR(EINVAL);
 852         }
 853         DRM_COPY_FROM_USER_IOCTL(mmio, (drm_i915_mmio_t __user *) data,
 854                                  sizeof(mmio));
 855
 856         if (mmio.reg >= mmio_table_size)
 857                 return DRM_ERR(EINVAL);
 858
 859         e = &mmio_table[mmio.reg];
 860         base = dev_priv->mmio_map->handle + e->offset;
 861
 862         switch (mmio.read_write) {
 863                 case I915_MMIO_READ:
 864                         if (!(e->flag & I915_MMIO_MAY_READ))
 865                                 return DRM_ERR(EINVAL);
 866                         memcpy_fromio(buf, base, e->size);
 867                         if (DRM_COPY_TO_USER(mmio.data, buf, e->size)) {
 868                                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 869                                 return DRM_ERR(EFAULT);
 870                         }
 871                         break;
 872
 873                 case I915_MMIO_WRITE:
 874                         if (!(e->flag & I915_MMIO_MAY_WRITE))
 875                                 return DRM_ERR(EINVAL);
 876                         if(DRM_COPY_FROM_USER(buf, mmio.data, e->size)) {
 877                                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 878                                 return DRM_ERR(EFAULT);
 879                         }
 880                         memcpy_toio(base, buf, e->size);
 881                         break;
 882         }
 883         return 0;
 884 }
 885
 886 int i915_driver_load(drm_device_t *dev, unsigned long flags)
 887 {
 888         /* i915 has 4 more counters */
 889         dev->counters += 4;
 890         dev->types[6] = _DRM_STAT_IRQ;
 891         dev->types[7] = _DRM_STAT_PRIMARY;
 892         dev->types[8] = _DRM_STAT_SECONDARY;
 893         dev->types[9] = _DRM_STAT_DMA;
 894
 895         return 0;
 896 }
 897
 898 void i915_driver_lastclose(drm_device_t * dev)
 899 {
 900         if (dev->dev_private) {
 901                 drm_i915_private_t *dev_priv = dev->dev_private;
 902                 i915_do_cleanup_pageflip(dev);
 903                 i915_mem_takedown(&(dev_priv->agp_heap));
 904         }
 905         i915_dma_cleanup(dev);
 906 }
 907
 908 void i915_driver_preclose(drm_device_t * dev, DRMFILE filp)
 909 {
 910         if (dev->dev_private) {
 911                 drm_i915_private_t *dev_priv = dev->dev_private;
 912                 i915_mem_release(dev, filp, dev_priv->agp_heap);
 913         }
 914 }
 915
 916 drm_ioctl_desc_t i915_ioctls[] = {
 917         [DRM_IOCTL_NR(DRM_I915_INIT)] = {i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
 918         [DRM_IOCTL_NR(DRM_I915_FLUSH)] = {i915_flush_ioctl, DRM_AUTH},
 919         [DRM_IOCTL_NR(DRM_I915_FLIP)] = {i915_flip_bufs, DRM_AUTH},
 920         [DRM_IOCTL_NR(DRM_I915_BATCHBUFFER)] = {i915_batchbuffer, DRM_AUTH},
 921         [DRM_IOCTL_NR(DRM_I915_IRQ_EMIT)] = {i915_irq_emit, DRM_AUTH},
 922         [DRM_IOCTL_NR(DRM_I915_IRQ_WAIT)] = {i915_irq_wait, DRM_AUTH},
 923         [DRM_IOCTL_NR(DRM_I915_GETPARAM)] = {i915_getparam, DRM_AUTH},
 924         [DRM_IOCTL_NR(DRM_I915_SETPARAM)] = {i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
 925         [DRM_IOCTL_NR(DRM_I915_ALLOC)] = {i915_mem_alloc, DRM_AUTH},
 926         [DRM_IOCTL_NR(DRM_I915_FREE)] = {i915_mem_free, DRM_AUTH},
 927         [DRM_IOCTL_NR(DRM_I915_INIT_HEAP)] = {i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY},
 928         [DRM_IOCTL_NR(DRM_I915_CMDBUFFER)] = {i915_cmdbuffer, DRM_AUTH},
 929         [DRM_IOCTL_NR(DRM_I915_DESTROY_HEAP)] = { i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
 930         [DRM_IOCTL_NR(DRM_I915_SET_VBLANK_PIPE)] = { i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY },
 931         [DRM_IOCTL_NR(DRM_I915_GET_VBLANK_PIPE)] = { i915_vblank_pipe_get, DRM_AUTH },
 932         [DRM_IOCTL_NR(DRM_I915_VBLANK_SWAP)] = {i915_vblank_swap, DRM_AUTH},
 933         [DRM_IOCTL_NR(DRM_I915_MMIO)] = {i915_mmio, DRM_AUTH},
 934 };
 935
 936 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
 937
 938 /**
 939  * Determine if the device really is AGP or not.
 940  *
 941  * All Intel graphics chipsets are treated as AGP, even if they are really
 942  * PCI-e.
 943  *
 944  * \param dev   The device to be tested.
 945  *
 946  * \returns
 947  * A value of 1 is always retured to indictate every i9x5 is AGP.
 948  */
 949 int i915_driver_device_is_agp(drm_device_t * dev)
 950 {
 951         return 1;
 952 }