drivers/gpu/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 "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 acthd_reg = IS_I965G(dev) ? ACTHD_I965 : ACTHD;
  44         u32 last_acthd = I915_READ(acthd_reg);
  45         u32 acthd;
  46         u32 last_head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
  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                 if (acthd != last_acthd)
  64                         i = 0;
  65
  66                 last_head = ring->head;
  67                 last_acthd = acthd;
  68                 msleep_interruptible(10);
  69
  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         /* Program Hardware Status Page */
  83         dev_priv->status_page_dmah =
  84                 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE, 0xffffffff);
  85
  86         if (!dev_priv->status_page_dmah) {
  87                 DRM_ERROR("Can not allocate hardware status page\n");
  88                 return -ENOMEM;
  89         }
  90         dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
  91         dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
  92
  93         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
  94
  95         I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
  96         DRM_DEBUG("Enabled hardware status page\n");
  97         return 0;
  98 }
  99
 100 /**
 101  * Frees the hardware status page, whether it's a physical address or a virtual
 102  * address set up by the X Server.
 103  */
 104 static void i915_free_hws(struct drm_device *dev)
 105 {
 106         drm_i915_private_t *dev_priv = dev->dev_private;
 107         if (dev_priv->status_page_dmah) {
 108                 drm_pci_free(dev, dev_priv->status_page_dmah);
 109                 dev_priv->status_page_dmah = NULL;
 110         }
 111
 112         if (dev_priv->status_gfx_addr) {
 113                 dev_priv->status_gfx_addr = 0;
 114                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
 115         }
 116
 117         /* Need to rewrite hardware status page */
 118         I915_WRITE(HWS_PGA, 0x1ffff000);
 119 }
 120
 121 void i915_kernel_lost_context(struct drm_device * dev)
 122 {
 123         drm_i915_private_t *dev_priv = dev->dev_private;
 124         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
 125
 126         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 127         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 128         ring->space = ring->head - (ring->tail + 8);
 129         if (ring->space < 0)
 130                 ring->space += ring->Size;
 131
 132         if (ring->head == ring->tail && dev_priv->sarea_priv)
 133                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 134 }
 135
 136 static int i915_dma_cleanup(struct drm_device * dev)
 137 {
 138         drm_i915_private_t *dev_priv = dev->dev_private;
 139         /* Make sure interrupts are disabled here because the uninstall ioctl
 140          * may not have been called from userspace and after dev_private
 141          * is freed, it's too late.
 142          */
 143         if (dev->irq_enabled)
 144                 drm_irq_uninstall(dev);
 145
 146         if (dev_priv->ring.virtual_start) {
 147                 drm_core_ioremapfree(&dev_priv->ring.map, dev);
 148                 dev_priv->ring.virtual_start = NULL;
 149                 dev_priv->ring.map.handle = NULL;
 150                 dev_priv->ring.map.size = 0;
 151         }
 152
 153         /* Clear the HWS virtual address at teardown */
 154         if (I915_NEED_GFX_HWS(dev))
 155                 i915_free_hws(dev);
 156
 157         dev_priv->sarea = NULL;
 158         dev_priv->sarea_priv = NULL;
 159
 160         return 0;
 161 }
 162
 163 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 164 {
 165         drm_i915_private_t *dev_priv = dev->dev_private;
 166
 167         dev_priv->sarea = drm_getsarea(dev);
 168         if (!dev_priv->sarea) {
 169                 DRM_ERROR("can not find sarea!\n");
 170                 i915_dma_cleanup(dev);
 171                 return -EINVAL;
 172         }
 173
 174         dev_priv->sarea_priv = (drm_i915_sarea_t *)
 175             ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);
 176
 177         if (init->ring_size != 0) {
 178                 if (dev_priv->ring.ring_obj != NULL) {
 179                         i915_dma_cleanup(dev);
 180                         DRM_ERROR("Client tried to initialize ringbuffer in "
 181                                   "GEM mode\n");
 182                         return -EINVAL;
 183                 }
 184
 185                 dev_priv->ring.Size = init->ring_size;
 186                 dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
 187
 188                 dev_priv->ring.map.offset = init->ring_start;
 189                 dev_priv->ring.map.size = init->ring_size;
 190                 dev_priv->ring.map.type = 0;
 191                 dev_priv->ring.map.flags = 0;
 192                 dev_priv->ring.map.mtrr = 0;
 193
 194                 drm_core_ioremap(&dev_priv->ring.map, dev);
 195
 196                 if (dev_priv->ring.map.handle == NULL) {
 197                         i915_dma_cleanup(dev);
 198                         DRM_ERROR("can not ioremap virtual address for"
 199                                   " ring buffer\n");
 200                         return -ENOMEM;
 201                 }
 202         }
 203
 204         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 205
 206         dev_priv->cpp = init->cpp;
 207         dev_priv->back_offset = init->back_offset;
 208         dev_priv->front_offset = init->front_offset;
 209         dev_priv->current_page = 0;
 210         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 211
 212         /* Allow hardware batchbuffers unless told otherwise.
 213          */
 214         dev_priv->allow_batchbuffer = 1;
 215
 216         return 0;
 217 }
 218
 219 static int i915_dma_resume(struct drm_device * dev)
 220 {
 221         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 222
 223         DRM_DEBUG("%s\n", __func__);
 224
 225         if (!dev_priv->sarea) {
 226                 DRM_ERROR("can not find sarea!\n");
 227                 return -EINVAL;
 228         }
 229
 230         if (dev_priv->ring.map.handle == NULL) {
 231                 DRM_ERROR("can not ioremap virtual address for"
 232                           " ring buffer\n");
 233                 return -ENOMEM;
 234         }
 235
 236         /* Program Hardware Status Page */
 237         if (!dev_priv->hw_status_page) {
 238                 DRM_ERROR("Can not find hardware status page\n");
 239                 return -EINVAL;
 240         }
 241         DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 242
 243         if (dev_priv->status_gfx_addr != 0)
 244                 I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 245         else
 246                 I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 247         DRM_DEBUG("Enabled hardware status page\n");
 248
 249         return 0;
 250 }
 251
 252 static int i915_dma_init(struct drm_device *dev, void *data,
 253                          struct drm_file *file_priv)
 254 {
 255         drm_i915_init_t *init = data;
 256         int retcode = 0;
 257
 258         switch (init->func) {
 259         case I915_INIT_DMA:
 260                 retcode = i915_initialize(dev, init);
 261                 break;
 262         case I915_CLEANUP_DMA:
 263                 retcode = i915_dma_cleanup(dev);
 264                 break;
 265         case I915_RESUME_DMA:
 266                 retcode = i915_dma_resume(dev);
 267                 break;
 268         default:
 269                 retcode = -EINVAL;
 270                 break;
 271         }
 272
 273         return retcode;
 274 }
 275
 276 /* Implement basically the same security restrictions as hardware does
 277  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 278  *
 279  * Most of the calculations below involve calculating the size of a
 280  * particular instruction.  It's important to get the size right as
 281  * that tells us where the next instruction to check is.  Any illegal
 282  * instruction detected will be given a size of zero, which is a
 283  * signal to abort the rest of the buffer.
 284  */
 285 static int do_validate_cmd(int cmd)
 286 {
 287         switch (((cmd >> 29) & 0x7)) {
 288         case 0x0:
 289                 switch ((cmd >> 23) & 0x3f) {
 290                 case 0x0:
 291                         return 1;       /* MI_NOOP */
 292                 case 0x4:
 293                         return 1;       /* MI_FLUSH */
 294                 default:
 295                         return 0;       /* disallow everything else */
 296                 }
 297                 break;
 298         case 0x1:
 299                 return 0;       /* reserved */
 300         case 0x2:
 301                 return (cmd & 0xff) + 2;        /* 2d commands */
 302         case 0x3:
 303                 if (((cmd >> 24) & 0x1f) <= 0x18)
 304                         return 1;
 305
 306                 switch ((cmd >> 24) & 0x1f) {
 307                 case 0x1c:
 308                         return 1;
 309                 case 0x1d:
 310                         switch ((cmd >> 16) & 0xff) {
 311                         case 0x3:
 312                                 return (cmd & 0x1f) + 2;
 313                         case 0x4:
 314                                 return (cmd & 0xf) + 2;
 315                         default:
 316                                 return (cmd & 0xffff) + 2;
 317                         }
 318                 case 0x1e:
 319                         if (cmd & (1 << 23))
 320                                 return (cmd & 0xffff) + 1;
 321                         else
 322                                 return 1;
 323                 case 0x1f:
 324                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 325                                 return (cmd & 0x1ffff) + 2;
 326                         else if (cmd & (1 << 17))       /* indirect random */
 327                                 if ((cmd & 0xffff) == 0)
 328                                         return 0;       /* unknown length, too hard */
 329                                 else
 330                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 331                         else
 332                                 return 2;       /* indirect sequential */
 333                 default:
 334                         return 0;
 335                 }
 336         default:
 337                 return 0;
 338         }
 339
 340         return 0;
 341 }
 342
 343 static int validate_cmd(int cmd)
 344 {
 345         int ret = do_validate_cmd(cmd);
 346
 347 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 348
 349         return ret;
 350 }
 351
 352 static int i915_emit_cmds(struct drm_device * dev, int __user * buffer, 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
 392 i915_emit_box(struct drm_device *dev,
 393               struct drm_clip_rect __user *boxes,
 394               int i, int DR1, int DR4)
 395 {
 396         drm_i915_private_t *dev_priv = dev->dev_private;
 397         struct drm_clip_rect box;
 398         RING_LOCALS;
 399
 400         if (DRM_COPY_FROM_USER_UNCHECKED(&box, &boxes[i], sizeof(box))) {
 401                 return -EFAULT;
 402         }
 403
 404         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 405                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 406                           box.x1, box.y1, box.x2, box.y2);
 407                 return -EINVAL;
 408         }
 409
 410         if (IS_I965G(dev)) {
 411                 BEGIN_LP_RING(4);
 412                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 413                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 414                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 415                 OUT_RING(DR4);
 416                 ADVANCE_LP_RING();
 417         } else {
 418                 BEGIN_LP_RING(6);
 419                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 420                 OUT_RING(DR1);
 421                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 422                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 423                 OUT_RING(DR4);
 424                 OUT_RING(0);
 425                 ADVANCE_LP_RING();
 426         }
 427
 428         return 0;
 429 }
 430
 431 /* XXX: Emitting the counter should really be moved to part of the IRQ
 432  * emit. For now, do it in both places:
 433  */
 434
 435 static void i915_emit_breadcrumb(struct drm_device *dev)
 436 {
 437         drm_i915_private_t *dev_priv = dev->dev_private;
 438         RING_LOCALS;
 439
 440         dev_priv->counter++;
 441         if (dev_priv->counter > 0x7FFFFFFFUL)
 442                 dev_priv->counter = 0;
 443         if (dev_priv->sarea_priv)
 444                 dev_priv->sarea_priv->last_enqueue = dev_priv->counter;
 445
 446         BEGIN_LP_RING(4);
 447         OUT_RING(MI_STORE_DWORD_INDEX);
 448         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 449         OUT_RING(dev_priv->counter);
 450         OUT_RING(0);
 451         ADVANCE_LP_RING();
 452 }
 453
 454 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 455                                    drm_i915_cmdbuffer_t * cmd)
 456 {
 457         int nbox = cmd->num_cliprects;
 458         int i = 0, count, ret;
 459
 460         if (cmd->sz & 0x3) {
 461                 DRM_ERROR("alignment");
 462                 return -EINVAL;
 463         }
 464
 465         i915_kernel_lost_context(dev);
 466
 467         count = nbox ? nbox : 1;
 468
 469         for (i = 0; i < count; i++) {
 470                 if (i < nbox) {
 471                         ret = i915_emit_box(dev, cmd->cliprects, i,
 472                                             cmd->DR1, cmd->DR4);
 473                         if (ret)
 474                                 return ret;
 475                 }
 476
 477                 ret = i915_emit_cmds(dev, (int __user *)cmd->buf, cmd->sz / 4);
 478                 if (ret)
 479                         return ret;
 480         }
 481
 482         i915_emit_breadcrumb(dev);
 483         return 0;
 484 }
 485
 486 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 487                                      drm_i915_batchbuffer_t * batch)
 488 {
 489         drm_i915_private_t *dev_priv = dev->dev_private;
 490         struct drm_clip_rect __user *boxes = batch->cliprects;
 491         int nbox = batch->num_cliprects;
 492         int i = 0, count;
 493         RING_LOCALS;
 494
 495         if ((batch->start | batch->used) & 0x7) {
 496                 DRM_ERROR("alignment");
 497                 return -EINVAL;
 498         }
 499
 500         i915_kernel_lost_context(dev);
 501
 502         count = nbox ? nbox : 1;
 503
 504         for (i = 0; i < count; i++) {
 505                 if (i < nbox) {
 506                         int ret = i915_emit_box(dev, boxes, i,
 507                                                 batch->DR1, batch->DR4);
 508                         if (ret)
 509                                 return ret;
 510                 }
 511
 512                 if (!IS_I830(dev) && !IS_845G(dev)) {
 513                         BEGIN_LP_RING(2);
 514                         if (IS_I965G(dev)) {
 515                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 516                                 OUT_RING(batch->start);
 517                         } else {
 518                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 519                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 520                         }
 521                         ADVANCE_LP_RING();
 522                 } else {
 523                         BEGIN_LP_RING(4);
 524                         OUT_RING(MI_BATCH_BUFFER);
 525                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 526                         OUT_RING(batch->start + batch->used - 4);
 527                         OUT_RING(0);
 528                         ADVANCE_LP_RING();
 529                 }
 530         }
 531
 532         i915_emit_breadcrumb(dev);
 533
 534         return 0;
 535 }
 536
 537 static int i915_dispatch_flip(struct drm_device * dev)
 538 {
 539         drm_i915_private_t *dev_priv = dev->dev_private;
 540         RING_LOCALS;
 541
 542         if (!dev_priv->sarea_priv)
 543                 return -EINVAL;
 544
 545         DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
 546                   __func__,
 547                   dev_priv->current_page,
 548                   dev_priv->sarea_priv->pf_current_page);
 549
 550         i915_kernel_lost_context(dev);
 551
 552         BEGIN_LP_RING(2);
 553         OUT_RING(MI_FLUSH | MI_READ_FLUSH);
 554         OUT_RING(0);
 555         ADVANCE_LP_RING();
 556
 557         BEGIN_LP_RING(6);
 558         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 559         OUT_RING(0);
 560         if (dev_priv->current_page == 0) {
 561                 OUT_RING(dev_priv->back_offset);
 562                 dev_priv->current_page = 1;
 563         } else {
 564                 OUT_RING(dev_priv->front_offset);
 565                 dev_priv->current_page = 0;
 566         }
 567         OUT_RING(0);
 568         ADVANCE_LP_RING();
 569
 570         BEGIN_LP_RING(2);
 571         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 572         OUT_RING(0);
 573         ADVANCE_LP_RING();
 574
 575         dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 576
 577         BEGIN_LP_RING(4);
 578         OUT_RING(MI_STORE_DWORD_INDEX);
 579         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 580         OUT_RING(dev_priv->counter);
 581         OUT_RING(0);
 582         ADVANCE_LP_RING();
 583
 584         dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 585         return 0;
 586 }
 587
 588 static int i915_quiescent(struct drm_device * dev)
 589 {
 590         drm_i915_private_t *dev_priv = dev->dev_private;
 591
 592         i915_kernel_lost_context(dev);
 593         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __func__);
 594 }
 595
 596 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 597                             struct drm_file *file_priv)
 598 {
 599         int ret;
 600
 601         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 602
 603         mutex_lock(&dev->struct_mutex);
 604         ret = i915_quiescent(dev);
 605         mutex_unlock(&dev->struct_mutex);
 606
 607         return ret;
 608 }
 609
 610 static int i915_batchbuffer(struct drm_device *dev, void *data,
 611                             struct drm_file *file_priv)
 612 {
 613         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 614         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 615             dev_priv->sarea_priv;
 616         drm_i915_batchbuffer_t *batch = data;
 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         if (batch->num_cliprects && DRM_VERIFYAREA_READ(batch->cliprects,
 630                                                        batch->num_cliprects *
 631                                                        sizeof(struct drm_clip_rect)))
 632                 return -EFAULT;
 633
 634         mutex_lock(&dev->struct_mutex);
 635         ret = i915_dispatch_batchbuffer(dev, batch);
 636         mutex_unlock(&dev->struct_mutex);
 637
 638         if (sarea_priv)
 639                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 640         return ret;
 641 }
 642
 643 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 644                           struct drm_file *file_priv)
 645 {
 646         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 647         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 648             dev_priv->sarea_priv;
 649         drm_i915_cmdbuffer_t *cmdbuf = data;
 650         int ret;
 651
 652         DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 653                   cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 654
 655         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 656
 657         if (cmdbuf->num_cliprects &&
 658             DRM_VERIFYAREA_READ(cmdbuf->cliprects,
 659                                 cmdbuf->num_cliprects *
 660                                 sizeof(struct drm_clip_rect))) {
 661                 DRM_ERROR("Fault accessing cliprects\n");
 662                 return -EFAULT;
 663         }
 664
 665         mutex_lock(&dev->struct_mutex);
 666         ret = i915_dispatch_cmdbuffer(dev, cmdbuf);
 667         mutex_unlock(&dev->struct_mutex);
 668         if (ret) {
 669                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 670                 return ret;
 671         }
 672
 673         if (sarea_priv)
 674                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 675         return 0;
 676 }
 677
 678 static int i915_flip_bufs(struct drm_device *dev, void *data,
 679                           struct drm_file *file_priv)
 680 {
 681         int ret;
 682
 683         DRM_DEBUG("%s\n", __func__);
 684
 685         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 686
 687         mutex_lock(&dev->struct_mutex);
 688         ret = i915_dispatch_flip(dev);
 689         mutex_unlock(&dev->struct_mutex);
 690
 691         return ret;
 692 }
 693
 694 static int i915_getparam(struct drm_device *dev, void *data,
 695                          struct drm_file *file_priv)
 696 {
 697         drm_i915_private_t *dev_priv = dev->dev_private;
 698         drm_i915_getparam_t *param = data;
 699         int value;
 700
 701         if (!dev_priv) {
 702                 DRM_ERROR("called with no initialization\n");
 703                 return -EINVAL;
 704         }
 705
 706         switch (param->param) {
 707         case I915_PARAM_IRQ_ACTIVE:
 708                 value = dev->pdev->irq ? 1 : 0;
 709                 break;
 710         case I915_PARAM_ALLOW_BATCHBUFFER:
 711                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 712                 break;
 713         case I915_PARAM_LAST_DISPATCH:
 714                 value = READ_BREADCRUMB(dev_priv);
 715                 break;
 716         case I915_PARAM_CHIPSET_ID:
 717                 value = dev->pci_device;
 718                 break;
 719         case I915_PARAM_HAS_GEM:
 720                 value = 1;
 721                 break;
 722         default:
 723                 DRM_ERROR("Unknown parameter %d\n", param->param);
 724                 return -EINVAL;
 725         }
 726
 727         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
 728                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 729                 return -EFAULT;
 730         }
 731
 732         return 0;
 733 }
 734
 735 static int i915_setparam(struct drm_device *dev, void *data,
 736                          struct drm_file *file_priv)
 737 {
 738         drm_i915_private_t *dev_priv = dev->dev_private;
 739         drm_i915_setparam_t *param = data;
 740
 741         if (!dev_priv) {
 742                 DRM_ERROR("called with no initialization\n");
 743                 return -EINVAL;
 744         }
 745
 746         switch (param->param) {
 747         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 748                 break;
 749         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 750                 dev_priv->tex_lru_log_granularity = param->value;
 751                 break;
 752         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 753                 dev_priv->allow_batchbuffer = param->value;
 754                 break;
 755         default:
 756                 DRM_ERROR("unknown parameter %d\n", param->param);
 757                 return -EINVAL;
 758         }
 759
 760         return 0;
 761 }
 762
 763 static int i915_set_status_page(struct drm_device *dev, void *data,
 764                                 struct drm_file *file_priv)
 765 {
 766         drm_i915_private_t *dev_priv = dev->dev_private;
 767         drm_i915_hws_addr_t *hws = data;
 768
 769         if (!I915_NEED_GFX_HWS(dev))
 770                 return -EINVAL;
 771
 772         if (!dev_priv) {
 773                 DRM_ERROR("called with no initialization\n");
 774                 return -EINVAL;
 775         }
 776
 777         printk(KERN_DEBUG "set status page addr 0x%08x\n", (u32)hws->addr);
 778
 779         dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
 780
 781         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 782         dev_priv->hws_map.size = 4*1024;
 783         dev_priv->hws_map.type = 0;
 784         dev_priv->hws_map.flags = 0;
 785         dev_priv->hws_map.mtrr = 0;
 786
 787         drm_core_ioremap(&dev_priv->hws_map, dev);
 788         if (dev_priv->hws_map.handle == NULL) {
 789                 i915_dma_cleanup(dev);
 790                 dev_priv->status_gfx_addr = 0;
 791                 DRM_ERROR("can not ioremap virtual address for"
 792                                 " G33 hw status page\n");
 793                 return -ENOMEM;
 794         }
 795         dev_priv->hw_status_page = dev_priv->hws_map.handle;
 796
 797         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 798         I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 799         DRM_DEBUG("load hws HWS_PGA with gfx mem 0x%x\n",
 800                         dev_priv->status_gfx_addr);
 801         DRM_DEBUG("load hws at %p\n", dev_priv->hw_status_page);
 802         return 0;
 803 }
 804
 805 int i915_driver_load(struct drm_device *dev, unsigned long flags)
 806 {
 807         struct drm_i915_private *dev_priv = dev->dev_private;
 808         unsigned long base, size;
 809         int ret = 0, mmio_bar = IS_I9XX(dev) ? 0 : 1;
 810
 811         /* i915 has 4 more counters */
 812         dev->counters += 4;
 813         dev->types[6] = _DRM_STAT_IRQ;
 814         dev->types[7] = _DRM_STAT_PRIMARY;
 815         dev->types[8] = _DRM_STAT_SECONDARY;
 816         dev->types[9] = _DRM_STAT_DMA;
 817
 818         dev_priv = drm_alloc(sizeof(drm_i915_private_t), DRM_MEM_DRIVER);
 819         if (dev_priv == NULL)
 820                 return -ENOMEM;
 821
 822         memset(dev_priv, 0, sizeof(drm_i915_private_t));
 823
 824         dev->dev_private = (void *)dev_priv;
 825         dev_priv->dev = dev;
 826
 827         /* Add register map (needed for suspend/resume) */
 828         base = drm_get_resource_start(dev, mmio_bar);
 829         size = drm_get_resource_len(dev, mmio_bar);
 830
 831         dev_priv->regs = ioremap(base, size);
 832
 833         i915_gem_load(dev);
 834
 835         /* Init HWS */
 836         if (!I915_NEED_GFX_HWS(dev)) {
 837                 ret = i915_init_phys_hws(dev);
 838                 if (ret != 0)
 839                         return ret;
 840         }
 841
 842         /* On the 945G/GM, the chipset reports the MSI capability on the
 843          * integrated graphics even though the support isn't actually there
 844          * according to the published specs.  It doesn't appear to function
 845          * correctly in testing on 945G.
 846          * This may be a side effect of MSI having been made available for PEG
 847          * and the registers being closely associated.
 848          *
 849          * According to chipset errata, on the 965GM, MSI interrupts may
 850          * be lost or delayed
 851          */
 852         if (!IS_I945G(dev) && !IS_I945GM(dev) && !IS_I965GM(dev))
 853                 pci_enable_msi(dev->pdev);
 854
 855         intel_opregion_init(dev);
 856
 857         spin_lock_init(&dev_priv->user_irq_lock);
 858
 859         ret = drm_vblank_init(dev, I915_NUM_PIPE);
 860
 861         if (ret) {
 862                 (void) i915_driver_unload(dev);
 863                 return ret;
 864         }
 865
 866         return ret;
 867 }
 868
 869 int i915_driver_unload(struct drm_device *dev)
 870 {
 871         struct drm_i915_private *dev_priv = dev->dev_private;
 872
 873         if (dev->pdev->msi_enabled)
 874                 pci_disable_msi(dev->pdev);
 875
 876         i915_free_hws(dev);
 877
 878         if (dev_priv->regs != NULL)
 879                 iounmap(dev_priv->regs);
 880
 881         intel_opregion_free(dev);
 882
 883         drm_free(dev->dev_private, sizeof(drm_i915_private_t),
 884                  DRM_MEM_DRIVER);
 885
 886         return 0;
 887 }
 888
 889 int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv)
 890 {
 891         struct drm_i915_file_private *i915_file_priv;
 892
 893         DRM_DEBUG("\n");
 894         i915_file_priv = (struct drm_i915_file_private *)
 895             drm_alloc(sizeof(*i915_file_priv), DRM_MEM_FILES);
 896
 897         if (!i915_file_priv)
 898                 return -ENOMEM;
 899
 900         file_priv->driver_priv = i915_file_priv;
 901
 902         i915_file_priv->mm.last_gem_seqno = 0;
 903         i915_file_priv->mm.last_gem_throttle_seqno = 0;
 904
 905         return 0;
 906 }
 907
 908 void i915_driver_lastclose(struct drm_device * dev)
 909 {
 910         drm_i915_private_t *dev_priv = dev->dev_private;
 911
 912         if (!dev_priv)
 913                 return;
 914
 915         i915_gem_lastclose(dev);
 916
 917         if (dev_priv->agp_heap)
 918                 i915_mem_takedown(&(dev_priv->agp_heap));
 919
 920         i915_dma_cleanup(dev);
 921 }
 922
 923 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
 924 {
 925         drm_i915_private_t *dev_priv = dev->dev_private;
 926         i915_mem_release(dev, file_priv, dev_priv->agp_heap);
 927 }
 928
 929 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file_priv)
 930 {
 931         struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv;
 932
 933         drm_free(i915_file_priv, sizeof(*i915_file_priv), DRM_MEM_FILES);
 934 }
 935
 936 struct drm_ioctl_desc i915_ioctls[] = {
 937         DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 938         DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
 939         DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH),
 940         DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
 941         DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
 942         DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
 943         DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH),
 944         DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 945         DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH),
 946         DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH),
 947         DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 948         DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
 949         DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
 950         DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
 951         DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH ),
 952         DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
 953         DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 954         DRM_IOCTL_DEF(DRM_I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 955         DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH),
 956         DRM_IOCTL_DEF(DRM_I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
 957         DRM_IOCTL_DEF(DRM_I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
 958         DRM_IOCTL_DEF(DRM_I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH),
 959         DRM_IOCTL_DEF(DRM_I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH),
 960         DRM_IOCTL_DEF(DRM_I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 961         DRM_IOCTL_DEF(DRM_I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 962         DRM_IOCTL_DEF(DRM_I915_GEM_CREATE, i915_gem_create_ioctl, 0),
 963         DRM_IOCTL_DEF(DRM_I915_GEM_PREAD, i915_gem_pread_ioctl, 0),
 964         DRM_IOCTL_DEF(DRM_I915_GEM_PWRITE, i915_gem_pwrite_ioctl, 0),
 965         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP, i915_gem_mmap_ioctl, 0),
 966         DRM_IOCTL_DEF(DRM_I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, 0),
 967         DRM_IOCTL_DEF(DRM_I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, 0),
 968         DRM_IOCTL_DEF(DRM_I915_GEM_SET_TILING, i915_gem_set_tiling, 0),
 969         DRM_IOCTL_DEF(DRM_I915_GEM_GET_TILING, i915_gem_get_tiling, 0),
 970         DRM_IOCTL_DEF(DRM_I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, 0),
 971 };
 972
 973 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
 974
 975 /**
 976  * Determine if the device really is AGP or not.
 977  *
 978  * All Intel graphics chipsets are treated as AGP, even if they are really
 979  * PCI-e.
 980  *
 981  * \param dev   The device to be tested.
 982  *
 983  * \returns
 984  * A value of 1 is always retured to indictate every i9x5 is AGP.
 985  */
 986 int i915_driver_device_is_agp(struct drm_device * dev)
 987 {
 988         return 1;
 989 }