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 "drm_crtc_helper.h"
  32 #include "drm_fb_helper.h"
  33 #include "intel_drv.h"
  34 #include "i915_drm.h"
  35 #include "i915_drv.h"
  36 #include "i915_trace.h"
  37 #include "../../../platform/x86/intel_ips.h"
  38 #include <linux/pci.h>
  39 #include <linux/vgaarb.h>
  40 #include <linux/acpi.h>
  41 #include <linux/pnp.h>
  42 #include <linux/vga_switcheroo.h>
  43 #include <linux/slab.h>
  44 #include <acpi/video.h>
  45
  46 /**
  47  * Sets up the hardware status page for devices that need a physical address
  48  * in the register.
  49  */
  50 static int i915_init_phys_hws(struct drm_device *dev)
  51 {
  52         drm_i915_private_t *dev_priv = dev->dev_private;
  53         struct intel_ring_buffer *ring = LP_RING(dev_priv);
  54
  55         /* Program Hardware Status Page */
  56         dev_priv->status_page_dmah =
  57                 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE);
  58
  59         if (!dev_priv->status_page_dmah) {
  60                 DRM_ERROR("Can not allocate hardware status page\n");
  61                 return -ENOMEM;
  62         }
  63         ring->status_page.page_addr = dev_priv->status_page_dmah->vaddr;
  64         dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
  65
  66         memset(ring->status_page.page_addr, 0, PAGE_SIZE);
  67
  68         if (INTEL_INFO(dev)->gen >= 4)
  69                 dev_priv->dma_status_page |= (dev_priv->dma_status_page >> 28) &
  70                                              0xf0;
  71
  72         I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
  73         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
  74         return 0;
  75 }
  76
  77 /**
  78  * Frees the hardware status page, whether it's a physical address or a virtual
  79  * address set up by the X Server.
  80  */
  81 static void i915_free_hws(struct drm_device *dev)
  82 {
  83         drm_i915_private_t *dev_priv = dev->dev_private;
  84         struct intel_ring_buffer *ring = LP_RING(dev_priv);
  85
  86         if (dev_priv->status_page_dmah) {
  87                 drm_pci_free(dev, dev_priv->status_page_dmah);
  88                 dev_priv->status_page_dmah = NULL;
  89         }
  90
  91         if (ring->status_page.gfx_addr) {
  92                 ring->status_page.gfx_addr = 0;
  93                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
  94         }
  95
  96         /* Need to rewrite hardware status page */
  97         I915_WRITE(HWS_PGA, 0x1ffff000);
  98 }
  99
 100 void i915_kernel_lost_context(struct drm_device * dev)
 101 {
 102         drm_i915_private_t *dev_priv = dev->dev_private;
 103         struct drm_i915_master_private *master_priv;
 104         struct intel_ring_buffer *ring = LP_RING(dev_priv);
 105
 106         /*
 107          * We should never lose context on the ring with modesetting
 108          * as we don't expose it to userspace
 109          */
 110         if (drm_core_check_feature(dev, DRIVER_MODESET))
 111                 return;
 112
 113         ring->head = I915_READ_HEAD(ring) & HEAD_ADDR;
 114         ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
 115         ring->space = ring->head - (ring->tail + 8);
 116         if (ring->space < 0)
 117                 ring->space += ring->size;
 118
 119         if (!dev->primary->master)
 120                 return;
 121
 122         master_priv = dev->primary->master->driver_priv;
 123         if (ring->head == ring->tail && master_priv->sarea_priv)
 124                 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 125 }
 126
 127 static int i915_dma_cleanup(struct drm_device * dev)
 128 {
 129         drm_i915_private_t *dev_priv = dev->dev_private;
 130         int i;
 131
 132         /* Make sure interrupts are disabled here because the uninstall ioctl
 133          * may not have been called from userspace and after dev_private
 134          * is freed, it's too late.
 135          */
 136         if (dev->irq_enabled)
 137                 drm_irq_uninstall(dev);
 138
 139         mutex_lock(&dev->struct_mutex);
 140         for (i = 0; i < I915_NUM_RINGS; i++)
 141                 intel_cleanup_ring_buffer(&dev_priv->ring[i]);
 142         mutex_unlock(&dev->struct_mutex);
 143
 144         /* Clear the HWS virtual address at teardown */
 145         if (I915_NEED_GFX_HWS(dev))
 146                 i915_free_hws(dev);
 147
 148         return 0;
 149 }
 150
 151 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 152 {
 153         drm_i915_private_t *dev_priv = dev->dev_private;
 154         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 155         struct intel_ring_buffer *ring = LP_RING(dev_priv);
 156
 157         master_priv->sarea = drm_getsarea(dev);
 158         if (master_priv->sarea) {
 159                 master_priv->sarea_priv = (drm_i915_sarea_t *)
 160                         ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
 161         } else {
 162                 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
 163         }
 164
 165         if (init->ring_size != 0) {
 166                 if (ring->obj != NULL) {
 167                         i915_dma_cleanup(dev);
 168                         DRM_ERROR("Client tried to initialize ringbuffer in "
 169                                   "GEM mode\n");
 170                         return -EINVAL;
 171                 }
 172
 173                 ring->size = init->ring_size;
 174
 175                 ring->map.offset = init->ring_start;
 176                 ring->map.size = init->ring_size;
 177                 ring->map.type = 0;
 178                 ring->map.flags = 0;
 179                 ring->map.mtrr = 0;
 180
 181                 drm_core_ioremap_wc(&ring->map, dev);
 182
 183                 if (ring->map.handle == NULL) {
 184                         i915_dma_cleanup(dev);
 185                         DRM_ERROR("can not ioremap virtual address for"
 186                                   " ring buffer\n");
 187                         return -ENOMEM;
 188                 }
 189         }
 190
 191         ring->virtual_start = ring->map.handle;
 192
 193         dev_priv->cpp = init->cpp;
 194         dev_priv->back_offset = init->back_offset;
 195         dev_priv->front_offset = init->front_offset;
 196         dev_priv->current_page = 0;
 197         if (master_priv->sarea_priv)
 198                 master_priv->sarea_priv->pf_current_page = 0;
 199
 200         /* Allow hardware batchbuffers unless told otherwise.
 201          */
 202         dev_priv->allow_batchbuffer = 1;
 203
 204         return 0;
 205 }
 206
 207 static int i915_dma_resume(struct drm_device * dev)
 208 {
 209         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 210         struct intel_ring_buffer *ring = LP_RING(dev_priv);
 211
 212         DRM_DEBUG_DRIVER("%s\n", __func__);
 213
 214         if (ring->map.handle == NULL) {
 215                 DRM_ERROR("can not ioremap virtual address for"
 216                           " ring buffer\n");
 217                 return -ENOMEM;
 218         }
 219
 220         /* Program Hardware Status Page */
 221         if (!ring->status_page.page_addr) {
 222                 DRM_ERROR("Can not find hardware status page\n");
 223                 return -EINVAL;
 224         }
 225         DRM_DEBUG_DRIVER("hw status page @ %p\n",
 226                                 ring->status_page.page_addr);
 227         if (ring->status_page.gfx_addr != 0)
 228                 intel_ring_setup_status_page(ring);
 229         else
 230                 I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 231
 232         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 233
 234         return 0;
 235 }
 236
 237 static int i915_dma_init(struct drm_device *dev, void *data,
 238                          struct drm_file *file_priv)
 239 {
 240         drm_i915_init_t *init = data;
 241         int retcode = 0;
 242
 243         switch (init->func) {
 244         case I915_INIT_DMA:
 245                 retcode = i915_initialize(dev, init);
 246                 break;
 247         case I915_CLEANUP_DMA:
 248                 retcode = i915_dma_cleanup(dev);
 249                 break;
 250         case I915_RESUME_DMA:
 251                 retcode = i915_dma_resume(dev);
 252                 break;
 253         default:
 254                 retcode = -EINVAL;
 255                 break;
 256         }
 257
 258         return retcode;
 259 }
 260
 261 /* Implement basically the same security restrictions as hardware does
 262  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 263  *
 264  * Most of the calculations below involve calculating the size of a
 265  * particular instruction.  It's important to get the size right as
 266  * that tells us where the next instruction to check is.  Any illegal
 267  * instruction detected will be given a size of zero, which is a
 268  * signal to abort the rest of the buffer.
 269  */
 270 static int validate_cmd(int cmd)
 271 {
 272         switch (((cmd >> 29) & 0x7)) {
 273         case 0x0:
 274                 switch ((cmd >> 23) & 0x3f) {
 275                 case 0x0:
 276                         return 1;       /* MI_NOOP */
 277                 case 0x4:
 278                         return 1;       /* MI_FLUSH */
 279                 default:
 280                         return 0;       /* disallow everything else */
 281                 }
 282                 break;
 283         case 0x1:
 284                 return 0;       /* reserved */
 285         case 0x2:
 286                 return (cmd & 0xff) + 2;        /* 2d commands */
 287         case 0x3:
 288                 if (((cmd >> 24) & 0x1f) <= 0x18)
 289                         return 1;
 290
 291                 switch ((cmd >> 24) & 0x1f) {
 292                 case 0x1c:
 293                         return 1;
 294                 case 0x1d:
 295                         switch ((cmd >> 16) & 0xff) {
 296                         case 0x3:
 297                                 return (cmd & 0x1f) + 2;
 298                         case 0x4:
 299                                 return (cmd & 0xf) + 2;
 300                         default:
 301                                 return (cmd & 0xffff) + 2;
 302                         }
 303                 case 0x1e:
 304                         if (cmd & (1 << 23))
 305                                 return (cmd & 0xffff) + 1;
 306                         else
 307                                 return 1;
 308                 case 0x1f:
 309                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 310                                 return (cmd & 0x1ffff) + 2;
 311                         else if (cmd & (1 << 17))       /* indirect random */
 312                                 if ((cmd & 0xffff) == 0)
 313                                         return 0;       /* unknown length, too hard */
 314                                 else
 315                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 316                         else
 317                                 return 2;       /* indirect sequential */
 318                 default:
 319                         return 0;
 320                 }
 321         default:
 322                 return 0;
 323         }
 324
 325         return 0;
 326 }
 327
 328 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
 329 {
 330         drm_i915_private_t *dev_priv = dev->dev_private;
 331         int i, ret;
 332
 333         if ((dwords+1) * sizeof(int) >= LP_RING(dev_priv)->size - 8)
 334                 return -EINVAL;
 335
 336         for (i = 0; i < dwords;) {
 337                 int sz = validate_cmd(buffer[i]);
 338                 if (sz == 0 || i + sz > dwords)
 339                         return -EINVAL;
 340                 i += sz;
 341         }
 342
 343         ret = BEGIN_LP_RING((dwords+1)&~1);
 344         if (ret)
 345                 return ret;
 346
 347         for (i = 0; i < dwords; i++)
 348                 OUT_RING(buffer[i]);
 349         if (dwords & 1)
 350                 OUT_RING(0);
 351
 352         ADVANCE_LP_RING();
 353
 354         return 0;
 355 }
 356
 357 int
 358 i915_emit_box(struct drm_device *dev,
 359               struct drm_clip_rect *box,
 360               int DR1, int DR4)
 361 {
 362         struct drm_i915_private *dev_priv = dev->dev_private;
 363         int ret;
 364
 365         if (box->y2 <= box->y1 || box->x2 <= box->x1 ||
 366             box->y2 <= 0 || box->x2 <= 0) {
 367                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 368                           box->x1, box->y1, box->x2, box->y2);
 369                 return -EINVAL;
 370         }
 371
 372         if (INTEL_INFO(dev)->gen >= 4) {
 373                 ret = BEGIN_LP_RING(4);
 374                 if (ret)
 375                         return ret;
 376
 377                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 378                 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
 379                 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
 380                 OUT_RING(DR4);
 381         } else {
 382                 ret = BEGIN_LP_RING(6);
 383                 if (ret)
 384                         return ret;
 385
 386                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 387                 OUT_RING(DR1);
 388                 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
 389                 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
 390                 OUT_RING(DR4);
 391                 OUT_RING(0);
 392         }
 393         ADVANCE_LP_RING();
 394
 395         return 0;
 396 }
 397
 398 /* XXX: Emitting the counter should really be moved to part of the IRQ
 399  * emit. For now, do it in both places:
 400  */
 401
 402 static void i915_emit_breadcrumb(struct drm_device *dev)
 403 {
 404         drm_i915_private_t *dev_priv = dev->dev_private;
 405         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 406
 407         dev_priv->counter++;
 408         if (dev_priv->counter > 0x7FFFFFFFUL)
 409                 dev_priv->counter = 0;
 410         if (master_priv->sarea_priv)
 411                 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
 412
 413         if (BEGIN_LP_RING(4) == 0) {
 414                 OUT_RING(MI_STORE_DWORD_INDEX);
 415                 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 416                 OUT_RING(dev_priv->counter);
 417                 OUT_RING(0);
 418                 ADVANCE_LP_RING();
 419         }
 420 }
 421
 422 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 423                                    drm_i915_cmdbuffer_t *cmd,
 424                                    struct drm_clip_rect *cliprects,
 425                                    void *cmdbuf)
 426 {
 427         int nbox = cmd->num_cliprects;
 428         int i = 0, count, ret;
 429
 430         if (cmd->sz & 0x3) {
 431                 DRM_ERROR("alignment");
 432                 return -EINVAL;
 433         }
 434
 435         i915_kernel_lost_context(dev);
 436
 437         count = nbox ? nbox : 1;
 438
 439         for (i = 0; i < count; i++) {
 440                 if (i < nbox) {
 441                         ret = i915_emit_box(dev, &cliprects[i],
 442                                             cmd->DR1, cmd->DR4);
 443                         if (ret)
 444                                 return ret;
 445                 }
 446
 447                 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
 448                 if (ret)
 449                         return ret;
 450         }
 451
 452         i915_emit_breadcrumb(dev);
 453         return 0;
 454 }
 455
 456 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 457                                      drm_i915_batchbuffer_t * batch,
 458                                      struct drm_clip_rect *cliprects)
 459 {
 460         struct drm_i915_private *dev_priv = dev->dev_private;
 461         int nbox = batch->num_cliprects;
 462         int i, count, ret;
 463
 464         if ((batch->start | batch->used) & 0x7) {
 465                 DRM_ERROR("alignment");
 466                 return -EINVAL;
 467         }
 468
 469         i915_kernel_lost_context(dev);
 470
 471         count = nbox ? nbox : 1;
 472         for (i = 0; i < count; i++) {
 473                 if (i < nbox) {
 474                         ret = i915_emit_box(dev, &cliprects[i],
 475                                             batch->DR1, batch->DR4);
 476                         if (ret)
 477                                 return ret;
 478                 }
 479
 480                 if (!IS_I830(dev) && !IS_845G(dev)) {
 481                         ret = BEGIN_LP_RING(2);
 482                         if (ret)
 483                                 return ret;
 484
 485                         if (INTEL_INFO(dev)->gen >= 4) {
 486                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 487                                 OUT_RING(batch->start);
 488                         } else {
 489                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 490                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 491                         }
 492                 } else {
 493                         ret = BEGIN_LP_RING(4);
 494                         if (ret)
 495                                 return ret;
 496
 497                         OUT_RING(MI_BATCH_BUFFER);
 498                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 499                         OUT_RING(batch->start + batch->used - 4);
 500                         OUT_RING(0);
 501                 }
 502                 ADVANCE_LP_RING();
 503         }
 504
 505
 506         if (IS_G4X(dev) || IS_GEN5(dev)) {
 507                 if (BEGIN_LP_RING(2) == 0) {
 508                         OUT_RING(MI_FLUSH | MI_NO_WRITE_FLUSH | MI_INVALIDATE_ISP);
 509                         OUT_RING(MI_NOOP);
 510                         ADVANCE_LP_RING();
 511                 }
 512         }
 513
 514         i915_emit_breadcrumb(dev);
 515         return 0;
 516 }
 517
 518 static int i915_dispatch_flip(struct drm_device * dev)
 519 {
 520         drm_i915_private_t *dev_priv = dev->dev_private;
 521         struct drm_i915_master_private *master_priv =
 522                 dev->primary->master->driver_priv;
 523         int ret;
 524
 525         if (!master_priv->sarea_priv)
 526                 return -EINVAL;
 527
 528         DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
 529                           __func__,
 530                          dev_priv->current_page,
 531                          master_priv->sarea_priv->pf_current_page);
 532
 533         i915_kernel_lost_context(dev);
 534
 535         ret = BEGIN_LP_RING(10);
 536         if (ret)
 537                 return ret;
 538
 539         OUT_RING(MI_FLUSH | MI_READ_FLUSH);
 540         OUT_RING(0);
 541
 542         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 543         OUT_RING(0);
 544         if (dev_priv->current_page == 0) {
 545                 OUT_RING(dev_priv->back_offset);
 546                 dev_priv->current_page = 1;
 547         } else {
 548                 OUT_RING(dev_priv->front_offset);
 549                 dev_priv->current_page = 0;
 550         }
 551         OUT_RING(0);
 552
 553         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 554         OUT_RING(0);
 555
 556         ADVANCE_LP_RING();
 557
 558         master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 559
 560         if (BEGIN_LP_RING(4) == 0) {
 561                 OUT_RING(MI_STORE_DWORD_INDEX);
 562                 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 563                 OUT_RING(dev_priv->counter);
 564                 OUT_RING(0);
 565                 ADVANCE_LP_RING();
 566         }
 567
 568         master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 569         return 0;
 570 }
 571
 572 static int i915_quiescent(struct drm_device *dev)
 573 {
 574         struct intel_ring_buffer *ring = LP_RING(dev->dev_private);
 575
 576         i915_kernel_lost_context(dev);
 577         return intel_wait_ring_buffer(ring, ring->size - 8);
 578 }
 579
 580 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 581                             struct drm_file *file_priv)
 582 {
 583         int ret;
 584
 585         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 586
 587         mutex_lock(&dev->struct_mutex);
 588         ret = i915_quiescent(dev);
 589         mutex_unlock(&dev->struct_mutex);
 590
 591         return ret;
 592 }
 593
 594 static int i915_batchbuffer(struct drm_device *dev, void *data,
 595                             struct drm_file *file_priv)
 596 {
 597         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 598         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 599         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 600             master_priv->sarea_priv;
 601         drm_i915_batchbuffer_t *batch = data;
 602         int ret;
 603         struct drm_clip_rect *cliprects = NULL;
 604
 605         if (!dev_priv->allow_batchbuffer) {
 606                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 607                 return -EINVAL;
 608         }
 609
 610         DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
 611                         batch->start, batch->used, batch->num_cliprects);
 612
 613         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 614
 615         if (batch->num_cliprects < 0)
 616                 return -EINVAL;
 617
 618         if (batch->num_cliprects) {
 619                 cliprects = kcalloc(batch->num_cliprects,
 620                                     sizeof(struct drm_clip_rect),
 621                                     GFP_KERNEL);
 622                 if (cliprects == NULL)
 623                         return -ENOMEM;
 624
 625                 ret = copy_from_user(cliprects, batch->cliprects,
 626                                      batch->num_cliprects *
 627                                      sizeof(struct drm_clip_rect));
 628                 if (ret != 0) {
 629                         ret = -EFAULT;
 630                         goto fail_free;
 631                 }
 632         }
 633
 634         mutex_lock(&dev->struct_mutex);
 635         ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
 636         mutex_unlock(&dev->struct_mutex);
 637
 638         if (sarea_priv)
 639                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 640
 641 fail_free:
 642         kfree(cliprects);
 643
 644         return ret;
 645 }
 646
 647 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 648                           struct drm_file *file_priv)
 649 {
 650         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 651         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 652         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 653             master_priv->sarea_priv;
 654         drm_i915_cmdbuffer_t *cmdbuf = data;
 655         struct drm_clip_rect *cliprects = NULL;
 656         void *batch_data;
 657         int ret;
 658
 659         DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 660                         cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 661
 662         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 663
 664         if (cmdbuf->num_cliprects < 0)
 665                 return -EINVAL;
 666
 667         batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
 668         if (batch_data == NULL)
 669                 return -ENOMEM;
 670
 671         ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
 672         if (ret != 0) {
 673                 ret = -EFAULT;
 674                 goto fail_batch_free;
 675         }
 676
 677         if (cmdbuf->num_cliprects) {
 678                 cliprects = kcalloc(cmdbuf->num_cliprects,
 679                                     sizeof(struct drm_clip_rect), GFP_KERNEL);
 680                 if (cliprects == NULL) {
 681                         ret = -ENOMEM;
 682                         goto fail_batch_free;
 683                 }
 684
 685                 ret = copy_from_user(cliprects, cmdbuf->cliprects,
 686                                      cmdbuf->num_cliprects *
 687                                      sizeof(struct drm_clip_rect));
 688                 if (ret != 0) {
 689                         ret = -EFAULT;
 690                         goto fail_clip_free;
 691                 }
 692         }
 693
 694         mutex_lock(&dev->struct_mutex);
 695         ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
 696         mutex_unlock(&dev->struct_mutex);
 697         if (ret) {
 698                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 699                 goto fail_clip_free;
 700         }
 701
 702         if (sarea_priv)
 703                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 704
 705 fail_clip_free:
 706         kfree(cliprects);
 707 fail_batch_free:
 708         kfree(batch_data);
 709
 710         return ret;
 711 }
 712
 713 static int i915_flip_bufs(struct drm_device *dev, void *data,
 714                           struct drm_file *file_priv)
 715 {
 716         int ret;
 717
 718         DRM_DEBUG_DRIVER("%s\n", __func__);
 719
 720         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 721
 722         mutex_lock(&dev->struct_mutex);
 723         ret = i915_dispatch_flip(dev);
 724         mutex_unlock(&dev->struct_mutex);
 725
 726         return ret;
 727 }
 728
 729 static int i915_getparam(struct drm_device *dev, void *data,
 730                          struct drm_file *file_priv)
 731 {
 732         drm_i915_private_t *dev_priv = dev->dev_private;
 733         drm_i915_getparam_t *param = data;
 734         int value;
 735
 736         if (!dev_priv) {
 737                 DRM_ERROR("called with no initialization\n");
 738                 return -EINVAL;
 739         }
 740
 741         switch (param->param) {
 742         case I915_PARAM_IRQ_ACTIVE:
 743                 value = dev->pdev->irq ? 1 : 0;
 744                 break;
 745         case I915_PARAM_ALLOW_BATCHBUFFER:
 746                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 747                 break;
 748         case I915_PARAM_LAST_DISPATCH:
 749                 value = READ_BREADCRUMB(dev_priv);
 750                 break;
 751         case I915_PARAM_CHIPSET_ID:
 752                 value = dev->pci_device;
 753                 break;
 754         case I915_PARAM_HAS_GEM:
 755                 value = dev_priv->has_gem;
 756                 break;
 757         case I915_PARAM_NUM_FENCES_AVAIL:
 758                 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
 759                 break;
 760         case I915_PARAM_HAS_OVERLAY:
 761                 value = dev_priv->overlay ? 1 : 0;
 762                 break;
 763         case I915_PARAM_HAS_PAGEFLIPPING:
 764                 value = 1;
 765                 break;
 766         case I915_PARAM_HAS_EXECBUF2:
 767                 /* depends on GEM */
 768                 value = dev_priv->has_gem;
 769                 break;
 770         case I915_PARAM_HAS_BSD:
 771                 value = HAS_BSD(dev);
 772                 break;
 773         case I915_PARAM_HAS_BLT:
 774                 value = HAS_BLT(dev);
 775                 break;
 776         case I915_PARAM_HAS_RELAXED_FENCING:
 777                 value = 1;
 778                 break;
 779         case I915_PARAM_HAS_COHERENT_RINGS:
 780                 value = 1;
 781                 break;
 782         case I915_PARAM_HAS_EXEC_CONSTANTS:
 783                 value = INTEL_INFO(dev)->gen >= 4;
 784                 break;
 785         default:
 786                 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
 787                                  param->param);
 788                 return -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 -EFAULT;
 794         }
 795
 796         return 0;
 797 }
 798
 799 static int i915_setparam(struct drm_device *dev, void *data,
 800                          struct drm_file *file_priv)
 801 {
 802         drm_i915_private_t *dev_priv = dev->dev_private;
 803         drm_i915_setparam_t *param = data;
 804
 805         if (!dev_priv) {
 806                 DRM_ERROR("called with no initialization\n");
 807                 return -EINVAL;
 808         }
 809
 810         switch (param->param) {
 811         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 812                 break;
 813         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 814                 dev_priv->tex_lru_log_granularity = param->value;
 815                 break;
 816         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 817                 dev_priv->allow_batchbuffer = param->value;
 818                 break;
 819         case I915_SETPARAM_NUM_USED_FENCES:
 820                 if (param->value > dev_priv->num_fence_regs ||
 821                     param->value < 0)
 822                         return -EINVAL;
 823                 /* Userspace can use first N regs */
 824                 dev_priv->fence_reg_start = param->value;
 825                 break;
 826         default:
 827                 DRM_DEBUG_DRIVER("unknown parameter %d\n",
 828                                         param->param);
 829                 return -EINVAL;
 830         }
 831
 832         return 0;
 833 }
 834
 835 static int i915_set_status_page(struct drm_device *dev, void *data,
 836                                 struct drm_file *file_priv)
 837 {
 838         drm_i915_private_t *dev_priv = dev->dev_private;
 839         drm_i915_hws_addr_t *hws = data;
 840         struct intel_ring_buffer *ring = LP_RING(dev_priv);
 841
 842         if (!I915_NEED_GFX_HWS(dev))
 843                 return -EINVAL;
 844
 845         if (!dev_priv) {
 846                 DRM_ERROR("called with no initialization\n");
 847                 return -EINVAL;
 848         }
 849
 850         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 851                 WARN(1, "tried to set status page when mode setting active\n");
 852                 return 0;
 853         }
 854
 855         DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
 856
 857         ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12);
 858
 859         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 860         dev_priv->hws_map.size = 4*1024;
 861         dev_priv->hws_map.type = 0;
 862         dev_priv->hws_map.flags = 0;
 863         dev_priv->hws_map.mtrr = 0;
 864
 865         drm_core_ioremap_wc(&dev_priv->hws_map, dev);
 866         if (dev_priv->hws_map.handle == NULL) {
 867                 i915_dma_cleanup(dev);
 868                 ring->status_page.gfx_addr = 0;
 869                 DRM_ERROR("can not ioremap virtual address for"
 870                                 " G33 hw status page\n");
 871                 return -ENOMEM;
 872         }
 873         ring->status_page.page_addr = dev_priv->hws_map.handle;
 874         memset(ring->status_page.page_addr, 0, PAGE_SIZE);
 875         I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
 876
 877         DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
 878                          ring->status_page.gfx_addr);
 879         DRM_DEBUG_DRIVER("load hws at %p\n",
 880                          ring->status_page.page_addr);
 881         return 0;
 882 }
 883
 884 static int i915_get_bridge_dev(struct drm_device *dev)
 885 {
 886         struct drm_i915_private *dev_priv = dev->dev_private;
 887
 888         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 889         if (!dev_priv->bridge_dev) {
 890                 DRM_ERROR("bridge device not found\n");
 891                 return -1;
 892         }
 893         return 0;
 894 }
 895
 896 #define MCHBAR_I915 0x44
 897 #define MCHBAR_I965 0x48
 898 #define MCHBAR_SIZE (4*4096)
 899
 900 #define DEVEN_REG 0x54
 901 #define   DEVEN_MCHBAR_EN (1 << 28)
 902
 903 /* Allocate space for the MCH regs if needed, return nonzero on error */
 904 static int
 905 intel_alloc_mchbar_resource(struct drm_device *dev)
 906 {
 907         drm_i915_private_t *dev_priv = dev->dev_private;
 908         int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 909         u32 temp_lo, temp_hi = 0;
 910         u64 mchbar_addr;
 911         int ret;
 912
 913         if (INTEL_INFO(dev)->gen >= 4)
 914                 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
 915         pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
 916         mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
 917
 918         /* If ACPI doesn't have it, assume we need to allocate it ourselves */
 919 #ifdef CONFIG_PNP
 920         if (mchbar_addr &&
 921             pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
 922                 return 0;
 923 #endif
 924
 925         /* Get some space for it */
 926         dev_priv->mch_res.name = "i915 MCHBAR";
 927         dev_priv->mch_res.flags = IORESOURCE_MEM;
 928         ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
 929                                      &dev_priv->mch_res,
 930                                      MCHBAR_SIZE, MCHBAR_SIZE,
 931                                      PCIBIOS_MIN_MEM,
 932                                      0, pcibios_align_resource,
 933                                      dev_priv->bridge_dev);
 934         if (ret) {
 935                 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
 936                 dev_priv->mch_res.start = 0;
 937                 return ret;
 938         }
 939
 940         if (INTEL_INFO(dev)->gen >= 4)
 941                 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
 942                                        upper_32_bits(dev_priv->mch_res.start));
 943
 944         pci_write_config_dword(dev_priv->bridge_dev, reg,
 945                                lower_32_bits(dev_priv->mch_res.start));
 946         return 0;
 947 }
 948
 949 /* Setup MCHBAR if possible, return true if we should disable it again */
 950 static void
 951 intel_setup_mchbar(struct drm_device *dev)
 952 {
 953         drm_i915_private_t *dev_priv = dev->dev_private;
 954         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 955         u32 temp;
 956         bool enabled;
 957
 958         dev_priv->mchbar_need_disable = false;
 959
 960         if (IS_I915G(dev) || IS_I915GM(dev)) {
 961                 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
 962                 enabled = !!(temp & DEVEN_MCHBAR_EN);
 963         } else {
 964                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 965                 enabled = temp & 1;
 966         }
 967
 968         /* If it's already enabled, don't have to do anything */
 969         if (enabled)
 970                 return;
 971
 972         if (intel_alloc_mchbar_resource(dev))
 973                 return;
 974
 975         dev_priv->mchbar_need_disable = true;
 976
 977         /* Space is allocated or reserved, so enable it. */
 978         if (IS_I915G(dev) || IS_I915GM(dev)) {
 979                 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
 980                                        temp | DEVEN_MCHBAR_EN);
 981         } else {
 982                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 983                 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
 984         }
 985 }
 986
 987 static void
 988 intel_teardown_mchbar(struct drm_device *dev)
 989 {
 990         drm_i915_private_t *dev_priv = dev->dev_private;
 991         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 992         u32 temp;
 993
 994         if (dev_priv->mchbar_need_disable) {
 995                 if (IS_I915G(dev) || IS_I915GM(dev)) {
 996                         pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
 997                         temp &= ~DEVEN_MCHBAR_EN;
 998                         pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
 999                 } else {
1000                         pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1001                         temp &= ~1;
1002                         pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
1003                 }
1004         }
1005
1006         if (dev_priv->mch_res.start)
1007                 release_resource(&dev_priv->mch_res);
1008 }
1009
1010 #define PTE_ADDRESS_MASK                0xfffff000
1011 #define PTE_ADDRESS_MASK_HIGH           0x000000f0 /* i915+ */
1012 #define PTE_MAPPING_TYPE_UNCACHED       (0 << 1)
1013 #define PTE_MAPPING_TYPE_DCACHE         (1 << 1) /* i830 only */
1014 #define PTE_MAPPING_TYPE_CACHED         (3 << 1)
1015 #define PTE_MAPPING_TYPE_MASK           (3 << 1)
1016 #define PTE_VALID                       (1 << 0)
1017
1018 /**
1019  * i915_stolen_to_phys - take an offset into stolen memory and turn it into
1020  *                       a physical one
1021  * @dev: drm device
1022  * @offset: address to translate
1023  *
1024  * Some chip functions require allocations from stolen space and need the
1025  * physical address of the memory in question.
1026  */
1027 static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset)
1028 {
1029         struct drm_i915_private *dev_priv = dev->dev_private;
1030         struct pci_dev *pdev = dev_priv->bridge_dev;
1031         u32 base;
1032
1033 #if 0
1034         /* On the machines I have tested the Graphics Base of Stolen Memory
1035          * is unreliable, so compute the base by subtracting the stolen memory
1036          * from the Top of Low Usable DRAM which is where the BIOS places
1037          * the graphics stolen memory.
1038          */
1039         if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1040                 /* top 32bits are reserved = 0 */
1041                 pci_read_config_dword(pdev, 0xA4, &base);
1042         } else {
1043                 /* XXX presume 8xx is the same as i915 */
1044                 pci_bus_read_config_dword(pdev->bus, 2, 0x5C, &base);
1045         }
1046 #else
1047         if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1048                 u16 val;
1049                 pci_read_config_word(pdev, 0xb0, &val);
1050                 base = val >> 4 << 20;
1051         } else {
1052                 u8 val;
1053                 pci_read_config_byte(pdev, 0x9c, &val);
1054                 base = val >> 3 << 27;
1055         }
1056         base -= dev_priv->mm.gtt->stolen_size;
1057 #endif
1058
1059         return base + offset;
1060 }
1061
1062 static void i915_warn_stolen(struct drm_device *dev)
1063 {
1064         DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1065         DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1066 }
1067
1068 static void i915_setup_compression(struct drm_device *dev, int size)
1069 {
1070         struct drm_i915_private *dev_priv = dev->dev_private;
1071         struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb);
1072         unsigned long cfb_base;
1073         unsigned long ll_base = 0;
1074
1075         compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0);
1076         if (compressed_fb)
1077                 compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1078         if (!compressed_fb)
1079                 goto err;
1080
1081         cfb_base = i915_stolen_to_phys(dev, compressed_fb->start);
1082         if (!cfb_base)
1083                 goto err_fb;
1084
1085         if (!(IS_GM45(dev) || HAS_PCH_SPLIT(dev))) {
1086                 compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen,
1087                                                     4096, 4096, 0);
1088                 if (compressed_llb)
1089                         compressed_llb = drm_mm_get_block(compressed_llb,
1090                                                           4096, 4096);
1091                 if (!compressed_llb)
1092                         goto err_fb;
1093
1094                 ll_base = i915_stolen_to_phys(dev, compressed_llb->start);
1095                 if (!ll_base)
1096                         goto err_llb;
1097         }
1098
1099         dev_priv->cfb_size = size;
1100
1101         intel_disable_fbc(dev);
1102         dev_priv->compressed_fb = compressed_fb;
1103         if (HAS_PCH_SPLIT(dev))
1104                 I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start);
1105         else if (IS_GM45(dev)) {
1106                 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1107         } else {
1108                 I915_WRITE(FBC_CFB_BASE, cfb_base);
1109                 I915_WRITE(FBC_LL_BASE, ll_base);
1110                 dev_priv->compressed_llb = compressed_llb;
1111         }
1112
1113         DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n",
1114                       cfb_base, ll_base, size >> 20);
1115         return;
1116
1117 err_llb:
1118         drm_mm_put_block(compressed_llb);
1119 err_fb:
1120         drm_mm_put_block(compressed_fb);
1121 err:
1122         dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1123         i915_warn_stolen(dev);
1124 }
1125
1126 static void i915_cleanup_compression(struct drm_device *dev)
1127 {
1128         struct drm_i915_private *dev_priv = dev->dev_private;
1129
1130         drm_mm_put_block(dev_priv->compressed_fb);
1131         if (dev_priv->compressed_llb)
1132                 drm_mm_put_block(dev_priv->compressed_llb);
1133 }
1134
1135 /* true = enable decode, false = disable decoder */
1136 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1137 {
1138         struct drm_device *dev = cookie;
1139
1140         intel_modeset_vga_set_state(dev, state);
1141         if (state)
1142                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1143                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1144         else
1145                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1146 }
1147
1148 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1149 {
1150         struct drm_device *dev = pci_get_drvdata(pdev);
1151         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
1152         if (state == VGA_SWITCHEROO_ON) {
1153                 printk(KERN_INFO "i915: switched on\n");
1154                 /* i915 resume handler doesn't set to D0 */
1155                 pci_set_power_state(dev->pdev, PCI_D0);
1156                 i915_resume(dev);
1157         } else {
1158                 printk(KERN_ERR "i915: switched off\n");
1159                 i915_suspend(dev, pmm);
1160         }
1161 }
1162
1163 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
1164 {
1165         struct drm_device *dev = pci_get_drvdata(pdev);
1166         bool can_switch;
1167
1168         spin_lock(&dev->count_lock);
1169         can_switch = (dev->open_count == 0);
1170         spin_unlock(&dev->count_lock);
1171         return can_switch;
1172 }
1173
1174 static int i915_load_modeset_init(struct drm_device *dev)
1175 {
1176         struct drm_i915_private *dev_priv = dev->dev_private;
1177         unsigned long prealloc_size, gtt_size, mappable_size;
1178         int ret = 0;
1179
1180         prealloc_size = dev_priv->mm.gtt->stolen_size;
1181         gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT;
1182         mappable_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1183
1184         /* Basic memrange allocator for stolen space */
1185         drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size);
1186
1187         /* Let GEM Manage all of the aperture.
1188          *
1189          * However, leave one page at the end still bound to the scratch page.
1190          * There are a number of places where the hardware apparently
1191          * prefetches past the end of the object, and we've seen multiple
1192          * hangs with the GPU head pointer stuck in a batchbuffer bound
1193          * at the last page of the aperture.  One page should be enough to
1194          * keep any prefetching inside of the aperture.
1195          */
1196         i915_gem_do_init(dev, 0, mappable_size, gtt_size - PAGE_SIZE);
1197
1198         mutex_lock(&dev->struct_mutex);
1199         ret = i915_gem_init_ringbuffer(dev);
1200         mutex_unlock(&dev->struct_mutex);
1201         if (ret)
1202                 goto out;
1203
1204         /* Try to set up FBC with a reasonable compressed buffer size */
1205         if (I915_HAS_FBC(dev) && i915_powersave) {
1206                 int cfb_size;
1207
1208                 /* Leave 1M for line length buffer & misc. */
1209
1210                 /* Try to get a 32M buffer... */
1211                 if (prealloc_size > (36*1024*1024))
1212                         cfb_size = 32*1024*1024;
1213                 else /* fall back to 7/8 of the stolen space */
1214                         cfb_size = prealloc_size * 7 / 8;
1215                 i915_setup_compression(dev, cfb_size);
1216         }
1217
1218         /* Allow hardware batchbuffers unless told otherwise. */
1219         dev_priv->allow_batchbuffer = 1;
1220
1221         ret = intel_parse_bios(dev);
1222         if (ret)
1223                 DRM_INFO("failed to find VBIOS tables\n");
1224
1225         /* if we have > 1 VGA cards, then disable the radeon VGA resources */
1226         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1227         if (ret)
1228                 goto cleanup_ringbuffer;
1229
1230         intel_register_dsm_handler();
1231
1232         ret = vga_switcheroo_register_client(dev->pdev,
1233                                              i915_switcheroo_set_state,
1234                                              NULL,
1235                                              i915_switcheroo_can_switch);
1236         if (ret)
1237                 goto cleanup_vga_client;
1238
1239         /* IIR "flip pending" bit means done if this bit is set */
1240         if (IS_GEN3(dev) && (I915_READ(ECOSKPD) & ECO_FLIP_DONE))
1241                 dev_priv->flip_pending_is_done = true;
1242
1243         intel_modeset_init(dev);
1244
1245         ret = drm_irq_install(dev);
1246         if (ret)
1247                 goto cleanup_vga_switcheroo;
1248
1249         /* Always safe in the mode setting case. */
1250         /* FIXME: do pre/post-mode set stuff in core KMS code */
1251         dev->vblank_disable_allowed = 1;
1252
1253         ret = intel_fbdev_init(dev);
1254         if (ret)
1255                 goto cleanup_irq;
1256
1257         drm_kms_helper_poll_init(dev);
1258
1259         /* We're off and running w/KMS */
1260         dev_priv->mm.suspended = 0;
1261
1262         return 0;
1263
1264 cleanup_irq:
1265         drm_irq_uninstall(dev);
1266 cleanup_vga_switcheroo:
1267         vga_switcheroo_unregister_client(dev->pdev);
1268 cleanup_vga_client:
1269         vga_client_register(dev->pdev, NULL, NULL, NULL);
1270 cleanup_ringbuffer:
1271         mutex_lock(&dev->struct_mutex);
1272         i915_gem_cleanup_ringbuffer(dev);
1273         mutex_unlock(&dev->struct_mutex);
1274 out:
1275         return ret;
1276 }
1277
1278 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1279 {
1280         struct drm_i915_master_private *master_priv;
1281
1282         master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1283         if (!master_priv)
1284                 return -ENOMEM;
1285
1286         master->driver_priv = master_priv;
1287         return 0;
1288 }
1289
1290 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1291 {
1292         struct drm_i915_master_private *master_priv = master->driver_priv;
1293
1294         if (!master_priv)
1295                 return;
1296
1297         kfree(master_priv);
1298
1299         master->driver_priv = NULL;
1300 }
1301
1302 static void i915_pineview_get_mem_freq(struct drm_device *dev)
1303 {
1304         drm_i915_private_t *dev_priv = dev->dev_private;
1305         u32 tmp;
1306
1307         tmp = I915_READ(CLKCFG);
1308
1309         switch (tmp & CLKCFG_FSB_MASK) {
1310         case CLKCFG_FSB_533:
1311                 dev_priv->fsb_freq = 533; /* 133*4 */
1312                 break;
1313         case CLKCFG_FSB_800:
1314                 dev_priv->fsb_freq = 800; /* 200*4 */
1315                 break;
1316         case CLKCFG_FSB_667:
1317                 dev_priv->fsb_freq =  667; /* 167*4 */
1318                 break;
1319         case CLKCFG_FSB_400:
1320                 dev_priv->fsb_freq = 400; /* 100*4 */
1321                 break;
1322         }
1323
1324         switch (tmp & CLKCFG_MEM_MASK) {
1325         case CLKCFG_MEM_533:
1326                 dev_priv->mem_freq = 533;
1327                 break;
1328         case CLKCFG_MEM_667:
1329                 dev_priv->mem_freq = 667;
1330                 break;
1331         case CLKCFG_MEM_800:
1332                 dev_priv->mem_freq = 800;
1333                 break;
1334         }
1335
1336         /* detect pineview DDR3 setting */
1337         tmp = I915_READ(CSHRDDR3CTL);
1338         dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
1339 }
1340
1341 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
1342 {
1343         drm_i915_private_t *dev_priv = dev->dev_private;
1344         u16 ddrpll, csipll;
1345
1346         ddrpll = I915_READ16(DDRMPLL1);
1347         csipll = I915_READ16(CSIPLL0);
1348
1349         switch (ddrpll & 0xff) {
1350         case 0xc:
1351                 dev_priv->mem_freq = 800;
1352                 break;
1353         case 0x10:
1354                 dev_priv->mem_freq = 1066;
1355                 break;
1356         case 0x14:
1357                 dev_priv->mem_freq = 1333;
1358                 break;
1359         case 0x18:
1360                 dev_priv->mem_freq = 1600;
1361                 break;
1362         default:
1363                 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
1364                                  ddrpll & 0xff);
1365                 dev_priv->mem_freq = 0;
1366                 break;
1367         }
1368
1369         dev_priv->r_t = dev_priv->mem_freq;
1370
1371         switch (csipll & 0x3ff) {
1372         case 0x00c:
1373                 dev_priv->fsb_freq = 3200;
1374                 break;
1375         case 0x00e:
1376                 dev_priv->fsb_freq = 3733;
1377                 break;
1378         case 0x010:
1379                 dev_priv->fsb_freq = 4266;
1380                 break;
1381         case 0x012:
1382                 dev_priv->fsb_freq = 4800;
1383                 break;
1384         case 0x014:
1385                 dev_priv->fsb_freq = 5333;
1386                 break;
1387         case 0x016:
1388                 dev_priv->fsb_freq = 5866;
1389                 break;
1390         case 0x018:
1391                 dev_priv->fsb_freq = 6400;
1392                 break;
1393         default:
1394                 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
1395                                  csipll & 0x3ff);
1396                 dev_priv->fsb_freq = 0;
1397                 break;
1398         }
1399
1400         if (dev_priv->fsb_freq == 3200) {
1401                 dev_priv->c_m = 0;
1402         } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
1403                 dev_priv->c_m = 1;
1404         } else {
1405                 dev_priv->c_m = 2;
1406         }
1407 }
1408
1409 static const struct cparams {
1410         u16 i;
1411         u16 t;
1412         u16 m;
1413         u16 c;
1414 } cparams[] = {
1415         { 1, 1333, 301, 28664 },
1416         { 1, 1066, 294, 24460 },
1417         { 1, 800, 294, 25192 },
1418         { 0, 1333, 276, 27605 },
1419         { 0, 1066, 276, 27605 },
1420         { 0, 800, 231, 23784 },
1421 };
1422
1423 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
1424 {
1425         u64 total_count, diff, ret;
1426         u32 count1, count2, count3, m = 0, c = 0;
1427         unsigned long now = jiffies_to_msecs(jiffies), diff1;
1428         int i;
1429
1430         diff1 = now - dev_priv->last_time1;
1431
1432         count1 = I915_READ(DMIEC);
1433         count2 = I915_READ(DDREC);
1434         count3 = I915_READ(CSIEC);
1435
1436         total_count = count1 + count2 + count3;
1437
1438         /* FIXME: handle per-counter overflow */
1439         if (total_count < dev_priv->last_count1) {
1440                 diff = ~0UL - dev_priv->last_count1;
1441                 diff += total_count;
1442         } else {
1443                 diff = total_count - dev_priv->last_count1;
1444         }
1445
1446         for (i = 0; i < ARRAY_SIZE(cparams); i++) {
1447                 if (cparams[i].i == dev_priv->c_m &&
1448                     cparams[i].t == dev_priv->r_t) {
1449                         m = cparams[i].m;
1450                         c = cparams[i].c;
1451                         break;
1452                 }
1453         }
1454
1455         diff = div_u64(diff, diff1);
1456         ret = ((m * diff) + c);
1457         ret = div_u64(ret, 10);
1458
1459         dev_priv->last_count1 = total_count;
1460         dev_priv->last_time1 = now;
1461
1462         return ret;
1463 }
1464
1465 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
1466 {
1467         unsigned long m, x, b;
1468         u32 tsfs;
1469
1470         tsfs = I915_READ(TSFS);
1471
1472         m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
1473         x = I915_READ8(TR1);
1474
1475         b = tsfs & TSFS_INTR_MASK;
1476
1477         return ((m * x) / 127) - b;
1478 }
1479
1480 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
1481 {
1482         static const struct v_table {
1483                 u16 vd; /* in .1 mil */
1484                 u16 vm; /* in .1 mil */
1485         } v_table[] = {
1486                 { 0, 0, },
1487                 { 375, 0, },
1488                 { 500, 0, },
1489                 { 625, 0, },
1490                 { 750, 0, },
1491                 { 875, 0, },
1492                 { 1000, 0, },
1493                 { 1125, 0, },
1494                 { 4125, 3000, },
1495                 { 4125, 3000, },
1496                 { 4125, 3000, },
1497                 { 4125, 3000, },
1498                 { 4125, 3000, },
1499                 { 4125, 3000, },
1500                 { 4125, 3000, },
1501                 { 4125, 3000, },
1502                 { 4125, 3000, },
1503                 { 4125, 3000, },
1504                 { 4125, 3000, },
1505                 { 4125, 3000, },
1506                 { 4125, 3000, },
1507                 { 4125, 3000, },
1508                 { 4125, 3000, },
1509                 { 4125, 3000, },
1510                 { 4125, 3000, },
1511                 { 4125, 3000, },
1512                 { 4125, 3000, },
1513                 { 4125, 3000, },
1514                 { 4125, 3000, },
1515                 { 4125, 3000, },
1516                 { 4125, 3000, },
1517                 { 4125, 3000, },
1518                 { 4250, 3125, },
1519                 { 4375, 3250, },
1520                 { 4500, 3375, },
1521                 { 4625, 3500, },
1522                 { 4750, 3625, },
1523                 { 4875, 3750, },
1524                 { 5000, 3875, },
1525                 { 5125, 4000, },
1526                 { 5250, 4125, },
1527                 { 5375, 4250, },
1528                 { 5500, 4375, },
1529                 { 5625, 4500, },
1530                 { 5750, 4625, },
1531                 { 5875, 4750, },
1532                 { 6000, 4875, },
1533                 { 6125, 5000, },
1534                 { 6250, 5125, },
1535                 { 6375, 5250, },
1536                 { 6500, 5375, },
1537                 { 6625, 5500, },
1538                 { 6750, 5625, },
1539                 { 6875, 5750, },
1540                 { 7000, 5875, },
1541                 { 7125, 6000, },
1542                 { 7250, 6125, },
1543                 { 7375, 6250, },
1544                 { 7500, 6375, },
1545                 { 7625, 6500, },
1546                 { 7750, 6625, },
1547                 { 7875, 6750, },
1548                 { 8000, 6875, },
1549                 { 8125, 7000, },
1550                 { 8250, 7125, },
1551                 { 8375, 7250, },
1552                 { 8500, 7375, },
1553                 { 8625, 7500, },
1554                 { 8750, 7625, },
1555                 { 8875, 7750, },
1556                 { 9000, 7875, },
1557                 { 9125, 8000, },
1558                 { 9250, 8125, },
1559                 { 9375, 8250, },
1560                 { 9500, 8375, },
1561                 { 9625, 8500, },
1562                 { 9750, 8625, },
1563                 { 9875, 8750, },
1564                 { 10000, 8875, },
1565                 { 10125, 9000, },
1566                 { 10250, 9125, },
1567                 { 10375, 9250, },
1568                 { 10500, 9375, },
1569                 { 10625, 9500, },
1570                 { 10750, 9625, },
1571                 { 10875, 9750, },
1572                 { 11000, 9875, },
1573                 { 11125, 10000, },
1574                 { 11250, 10125, },
1575                 { 11375, 10250, },
1576                 { 11500, 10375, },
1577                 { 11625, 10500, },
1578                 { 11750, 10625, },
1579                 { 11875, 10750, },
1580                 { 12000, 10875, },
1581                 { 12125, 11000, },
1582                 { 12250, 11125, },
1583                 { 12375, 11250, },
1584                 { 12500, 11375, },
1585                 { 12625, 11500, },
1586                 { 12750, 11625, },
1587                 { 12875, 11750, },
1588                 { 13000, 11875, },
1589                 { 13125, 12000, },
1590                 { 13250, 12125, },
1591                 { 13375, 12250, },
1592                 { 13500, 12375, },
1593                 { 13625, 12500, },
1594                 { 13750, 12625, },
1595                 { 13875, 12750, },
1596                 { 14000, 12875, },
1597                 { 14125, 13000, },
1598                 { 14250, 13125, },
1599                 { 14375, 13250, },
1600                 { 14500, 13375, },
1601                 { 14625, 13500, },
1602                 { 14750, 13625, },
1603                 { 14875, 13750, },
1604                 { 15000, 13875, },
1605                 { 15125, 14000, },
1606                 { 15250, 14125, },
1607                 { 15375, 14250, },
1608                 { 15500, 14375, },
1609                 { 15625, 14500, },
1610                 { 15750, 14625, },
1611                 { 15875, 14750, },
1612                 { 16000, 14875, },
1613                 { 16125, 15000, },
1614         };
1615         if (dev_priv->info->is_mobile)
1616                 return v_table[pxvid].vm;
1617         else
1618                 return v_table[pxvid].vd;
1619 }
1620
1621 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
1622 {
1623         struct timespec now, diff1;
1624         u64 diff;
1625         unsigned long diffms;
1626         u32 count;
1627
1628         getrawmonotonic(&now);
1629         diff1 = timespec_sub(now, dev_priv->last_time2);
1630
1631         /* Don't divide by 0 */
1632         diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
1633         if (!diffms)
1634                 return;
1635
1636         count = I915_READ(GFXEC);
1637
1638         if (count < dev_priv->last_count2) {
1639                 diff = ~0UL - dev_priv->last_count2;
1640                 diff += count;
1641         } else {
1642                 diff = count - dev_priv->last_count2;
1643         }
1644
1645         dev_priv->last_count2 = count;
1646         dev_priv->last_time2 = now;
1647
1648         /* More magic constants... */
1649         diff = diff * 1181;
1650         diff = div_u64(diff, diffms * 10);
1651         dev_priv->gfx_power = diff;
1652 }
1653
1654 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
1655 {
1656         unsigned long t, corr, state1, corr2, state2;
1657         u32 pxvid, ext_v;
1658
1659         pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->cur_delay * 4));
1660         pxvid = (pxvid >> 24) & 0x7f;
1661         ext_v = pvid_to_extvid(dev_priv, pxvid);
1662
1663         state1 = ext_v;
1664
1665         t = i915_mch_val(dev_priv);
1666
1667         /* Revel in the empirically derived constants */
1668
1669         /* Correction factor in 1/100000 units */
1670         if (t > 80)
1671                 corr = ((t * 2349) + 135940);
1672         else if (t >= 50)
1673                 corr = ((t * 964) + 29317);
1674         else /* < 50 */
1675                 corr = ((t * 301) + 1004);
1676
1677         corr = corr * ((150142 * state1) / 10000 - 78642);
1678         corr /= 100000;
1679         corr2 = (corr * dev_priv->corr);
1680
1681         state2 = (corr2 * state1) / 10000;
1682         state2 /= 100; /* convert to mW */
1683
1684         i915_update_gfx_val(dev_priv);
1685
1686         return dev_priv->gfx_power + state2;
1687 }
1688
1689 /* Global for IPS driver to get at the current i915 device */
1690 static struct drm_i915_private *i915_mch_dev;
1691 /*
1692  * Lock protecting IPS related data structures
1693  *   - i915_mch_dev
1694  *   - dev_priv->max_delay
1695  *   - dev_priv->min_delay
1696  *   - dev_priv->fmax
1697  *   - dev_priv->gpu_busy
1698  */
1699 static DEFINE_SPINLOCK(mchdev_lock);
1700
1701 /**
1702  * i915_read_mch_val - return value for IPS use
1703  *
1704  * Calculate and return a value for the IPS driver to use when deciding whether
1705  * we have thermal and power headroom to increase CPU or GPU power budget.
1706  */
1707 unsigned long i915_read_mch_val(void)
1708 {
1709         struct drm_i915_private *dev_priv;
1710         unsigned long chipset_val, graphics_val, ret = 0;
1711
1712         spin_lock(&mchdev_lock);
1713         if (!i915_mch_dev)
1714                 goto out_unlock;
1715         dev_priv = i915_mch_dev;
1716
1717         chipset_val = i915_chipset_val(dev_priv);
1718         graphics_val = i915_gfx_val(dev_priv);
1719
1720         ret = chipset_val + graphics_val;
1721
1722 out_unlock:
1723         spin_unlock(&mchdev_lock);
1724
1725         return ret;
1726 }
1727 EXPORT_SYMBOL_GPL(i915_read_mch_val);
1728
1729 /**
1730  * i915_gpu_raise - raise GPU frequency limit
1731  *
1732  * Raise the limit; IPS indicates we have thermal headroom.
1733  */
1734 bool i915_gpu_raise(void)
1735 {
1736         struct drm_i915_private *dev_priv;
1737         bool ret = true;
1738
1739         spin_lock(&mchdev_lock);
1740         if (!i915_mch_dev) {
1741                 ret = false;
1742                 goto out_unlock;
1743         }
1744         dev_priv = i915_mch_dev;
1745
1746         if (dev_priv->max_delay > dev_priv->fmax)
1747                 dev_priv->max_delay--;
1748
1749 out_unlock:
1750         spin_unlock(&mchdev_lock);
1751
1752         return ret;
1753 }
1754 EXPORT_SYMBOL_GPL(i915_gpu_raise);
1755
1756 /**
1757  * i915_gpu_lower - lower GPU frequency limit
1758  *
1759  * IPS indicates we're close to a thermal limit, so throttle back the GPU
1760  * frequency maximum.
1761  */
1762 bool i915_gpu_lower(void)
1763 {
1764         struct drm_i915_private *dev_priv;
1765         bool ret = true;
1766
1767         spin_lock(&mchdev_lock);
1768         if (!i915_mch_dev) {
1769                 ret = false;
1770                 goto out_unlock;
1771         }
1772         dev_priv = i915_mch_dev;
1773
1774         if (dev_priv->max_delay < dev_priv->min_delay)
1775                 dev_priv->max_delay++;
1776
1777 out_unlock:
1778         spin_unlock(&mchdev_lock);
1779
1780         return ret;
1781 }
1782 EXPORT_SYMBOL_GPL(i915_gpu_lower);
1783
1784 /**
1785  * i915_gpu_busy - indicate GPU business to IPS
1786  *
1787  * Tell the IPS driver whether or not the GPU is busy.
1788  */
1789 bool i915_gpu_busy(void)
1790 {
1791         struct drm_i915_private *dev_priv;
1792         bool ret = false;
1793
1794         spin_lock(&mchdev_lock);
1795         if (!i915_mch_dev)
1796                 goto out_unlock;
1797         dev_priv = i915_mch_dev;
1798
1799         ret = dev_priv->busy;
1800
1801 out_unlock:
1802         spin_unlock(&mchdev_lock);
1803
1804         return ret;
1805 }
1806 EXPORT_SYMBOL_GPL(i915_gpu_busy);
1807
1808 /**
1809  * i915_gpu_turbo_disable - disable graphics turbo
1810  *
1811  * Disable graphics turbo by resetting the max frequency and setting the
1812  * current frequency to the default.
1813  */
1814 bool i915_gpu_turbo_disable(void)
1815 {
1816         struct drm_i915_private *dev_priv;
1817         bool ret = true;
1818
1819         spin_lock(&mchdev_lock);
1820         if (!i915_mch_dev) {
1821                 ret = false;
1822                 goto out_unlock;
1823         }
1824         dev_priv = i915_mch_dev;
1825
1826         dev_priv->max_delay = dev_priv->fstart;
1827
1828         if (!ironlake_set_drps(dev_priv->dev, dev_priv->fstart))
1829                 ret = false;
1830
1831 out_unlock:
1832         spin_unlock(&mchdev_lock);
1833
1834         return ret;
1835 }
1836 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
1837
1838 /**
1839  * Tells the intel_ips driver that the i915 driver is now loaded, if
1840  * IPS got loaded first.
1841  *
1842  * This awkward dance is so that neither module has to depend on the
1843  * other in order for IPS to do the appropriate communication of
1844  * GPU turbo limits to i915.
1845  */
1846 static void
1847 ips_ping_for_i915_load(void)
1848 {
1849         void (*link)(void);
1850
1851         link = symbol_get(ips_link_to_i915_driver);
1852         if (link) {
1853                 link();
1854                 symbol_put(ips_link_to_i915_driver);
1855         }
1856 }
1857
1858 /**
1859  * i915_driver_load - setup chip and create an initial config
1860  * @dev: DRM device
1861  * @flags: startup flags
1862  *
1863  * The driver load routine has to do several things:
1864  *   - drive output discovery via intel_modeset_init()
1865  *   - initialize the memory manager
1866  *   - allocate initial config memory
1867  *   - setup the DRM framebuffer with the allocated memory
1868  */
1869 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1870 {
1871         struct drm_i915_private *dev_priv;
1872         int ret = 0, mmio_bar;
1873         uint32_t agp_size;
1874
1875         /* i915 has 4 more counters */
1876         dev->counters += 4;
1877         dev->types[6] = _DRM_STAT_IRQ;
1878         dev->types[7] = _DRM_STAT_PRIMARY;
1879         dev->types[8] = _DRM_STAT_SECONDARY;
1880         dev->types[9] = _DRM_STAT_DMA;
1881
1882         dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1883         if (dev_priv == NULL)
1884                 return -ENOMEM;
1885
1886         dev->dev_private = (void *)dev_priv;
1887         dev_priv->dev = dev;
1888         dev_priv->info = (struct intel_device_info *) flags;
1889
1890         if (i915_get_bridge_dev(dev)) {
1891                 ret = -EIO;
1892                 goto free_priv;
1893         }
1894
1895         /* overlay on gen2 is broken and can't address above 1G */
1896         if (IS_GEN2(dev))
1897                 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
1898
1899         mmio_bar = IS_GEN2(dev) ? 1 : 0;
1900         dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, 0);
1901         if (!dev_priv->regs) {
1902                 DRM_ERROR("failed to map registers\n");
1903                 ret = -EIO;
1904                 goto put_bridge;
1905         }
1906
1907         dev_priv->mm.gtt = intel_gtt_get();
1908         if (!dev_priv->mm.gtt) {
1909                 DRM_ERROR("Failed to initialize GTT\n");
1910                 ret = -ENODEV;
1911                 goto out_iomapfree;
1912         }
1913
1914         agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1915
1916         dev_priv->mm.gtt_mapping =
1917                 io_mapping_create_wc(dev->agp->base, agp_size);
1918         if (dev_priv->mm.gtt_mapping == NULL) {
1919                 ret = -EIO;
1920                 goto out_rmmap;
1921         }
1922
1923         /* Set up a WC MTRR for non-PAT systems.  This is more common than
1924          * one would think, because the kernel disables PAT on first
1925          * generation Core chips because WC PAT gets overridden by a UC
1926          * MTRR if present.  Even if a UC MTRR isn't present.
1927          */
1928         dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1929                                          agp_size,
1930                                          MTRR_TYPE_WRCOMB, 1);
1931         if (dev_priv->mm.gtt_mtrr < 0) {
1932                 DRM_INFO("MTRR allocation failed.  Graphics "
1933                          "performance may suffer.\n");
1934         }
1935
1936         /* The i915 workqueue is primarily used for batched retirement of
1937          * requests (and thus managing bo) once the task has been completed
1938          * by the GPU. i915_gem_retire_requests() is called directly when we
1939          * need high-priority retirement, such as waiting for an explicit
1940          * bo.
1941          *
1942          * It is also used for periodic low-priority events, such as
1943          * idle-timers and recording error state.
1944          *
1945          * All tasks on the workqueue are expected to acquire the dev mutex
1946          * so there is no point in running more than one instance of the
1947          * workqueue at any time: max_active = 1 and NON_REENTRANT.
1948          */
1949         dev_priv->wq = alloc_workqueue("i915",
1950                                        WQ_UNBOUND | WQ_NON_REENTRANT,
1951                                        1);
1952         if (dev_priv->wq == NULL) {
1953                 DRM_ERROR("Failed to create our workqueue.\n");
1954                 ret = -ENOMEM;
1955                 goto out_iomapfree;
1956         }
1957
1958         /* enable GEM by default */
1959         dev_priv->has_gem = 1;
1960
1961         if (dev_priv->has_gem == 0 &&
1962             drm_core_check_feature(dev, DRIVER_MODESET)) {
1963                 DRM_ERROR("kernel modesetting requires GEM, disabling driver.\n");
1964                 ret = -ENODEV;
1965                 goto out_workqueue_free;
1966         }
1967
1968         dev->driver->get_vblank_counter = i915_get_vblank_counter;
1969         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
1970         if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev)) {
1971                 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
1972                 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
1973         }
1974
1975         /* Try to make sure MCHBAR is enabled before poking at it */
1976         intel_setup_mchbar(dev);
1977         intel_setup_gmbus(dev);
1978         intel_opregion_setup(dev);
1979
1980         /* Make sure the bios did its job and set up vital registers */
1981         intel_setup_bios(dev);
1982
1983         i915_gem_load(dev);
1984
1985         /* Init HWS */
1986         if (!I915_NEED_GFX_HWS(dev)) {
1987                 ret = i915_init_phys_hws(dev);
1988                 if (ret)
1989                         goto out_gem_unload;
1990         }
1991
1992         if (IS_PINEVIEW(dev))
1993                 i915_pineview_get_mem_freq(dev);
1994         else if (IS_GEN5(dev))
1995                 i915_ironlake_get_mem_freq(dev);
1996
1997         /* On the 945G/GM, the chipset reports the MSI capability on the
1998          * integrated graphics even though the support isn't actually there
1999          * according to the published specs.  It doesn't appear to function
2000          * correctly in testing on 945G.
2001          * This may be a side effect of MSI having been made available for PEG
2002          * and the registers being closely associated.
2003          *
2004          * According to chipset errata, on the 965GM, MSI interrupts may
2005          * be lost or delayed, but we use them anyways to avoid
2006          * stuck interrupts on some machines.
2007          */
2008         if (!IS_I945G(dev) && !IS_I945GM(dev))
2009                 pci_enable_msi(dev->pdev);
2010
2011         spin_lock_init(&dev_priv->irq_lock);
2012         spin_lock_init(&dev_priv->error_lock);
2013         dev_priv->trace_irq_seqno = 0;
2014
2015         ret = drm_vblank_init(dev, I915_NUM_PIPE);
2016         if (ret)
2017                 goto out_gem_unload;
2018
2019         /* Start out suspended */
2020         dev_priv->mm.suspended = 1;
2021
2022         intel_detect_pch(dev);
2023
2024         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2025                 ret = i915_load_modeset_init(dev);
2026                 if (ret < 0) {
2027                         DRM_ERROR("failed to init modeset\n");
2028                         goto out_gem_unload;
2029                 }
2030         }
2031
2032         /* Must be done after probing outputs */
2033         intel_opregion_init(dev);
2034         acpi_video_register();
2035
2036         setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
2037                     (unsigned long) dev);
2038
2039         spin_lock(&mchdev_lock);
2040         i915_mch_dev = dev_priv;
2041         dev_priv->mchdev_lock = &mchdev_lock;
2042         spin_unlock(&mchdev_lock);
2043
2044         ips_ping_for_i915_load();
2045
2046         return 0;
2047
2048 out_gem_unload:
2049         if (dev->pdev->msi_enabled)
2050                 pci_disable_msi(dev->pdev);
2051
2052         intel_teardown_gmbus(dev);
2053         intel_teardown_mchbar(dev);
2054 out_workqueue_free:
2055         destroy_workqueue(dev_priv->wq);
2056 out_iomapfree:
2057         io_mapping_free(dev_priv->mm.gtt_mapping);
2058 out_rmmap:
2059         pci_iounmap(dev->pdev, dev_priv->regs);
2060 put_bridge:
2061         pci_dev_put(dev_priv->bridge_dev);
2062 free_priv:
2063         kfree(dev_priv);
2064         return ret;
2065 }
2066
2067 int i915_driver_unload(struct drm_device *dev)
2068 {
2069         struct drm_i915_private *dev_priv = dev->dev_private;
2070         int ret;
2071
2072         spin_lock(&mchdev_lock);
2073         i915_mch_dev = NULL;
2074         spin_unlock(&mchdev_lock);
2075
2076         if (dev_priv->mm.inactive_shrinker.shrink)
2077                 unregister_shrinker(&dev_priv->mm.inactive_shrinker);
2078
2079         mutex_lock(&dev->struct_mutex);
2080         ret = i915_gpu_idle(dev);
2081         if (ret)
2082                 DRM_ERROR("failed to idle hardware: %d\n", ret);
2083         mutex_unlock(&dev->struct_mutex);
2084
2085         /* Cancel the retire work handler, which should be idle now. */
2086         cancel_delayed_work_sync(&dev_priv->mm.retire_work);
2087
2088         io_mapping_free(dev_priv->mm.gtt_mapping);
2089         if (dev_priv->mm.gtt_mtrr >= 0) {
2090                 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2091                          dev->agp->agp_info.aper_size * 1024 * 1024);
2092                 dev_priv->mm.gtt_mtrr = -1;
2093         }
2094
2095         acpi_video_unregister();
2096
2097         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2098                 intel_fbdev_fini(dev);
2099                 intel_modeset_cleanup(dev);
2100
2101                 /*
2102                  * free the memory space allocated for the child device
2103                  * config parsed from VBT
2104                  */
2105                 if (dev_priv->child_dev && dev_priv->child_dev_num) {
2106                         kfree(dev_priv->child_dev);
2107                         dev_priv->child_dev = NULL;
2108                         dev_priv->child_dev_num = 0;
2109                 }
2110
2111                 vga_switcheroo_unregister_client(dev->pdev);
2112                 vga_client_register(dev->pdev, NULL, NULL, NULL);
2113         }
2114
2115         /* Free error state after interrupts are fully disabled. */
2116         del_timer_sync(&dev_priv->hangcheck_timer);
2117         cancel_work_sync(&dev_priv->error_work);
2118         i915_destroy_error_state(dev);
2119
2120         if (dev->pdev->msi_enabled)
2121                 pci_disable_msi(dev->pdev);
2122
2123         intel_opregion_fini(dev);
2124
2125         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2126                 /* Flush any outstanding unpin_work. */
2127                 flush_workqueue(dev_priv->wq);
2128
2129                 i915_gem_free_all_phys_object(dev);
2130
2131                 mutex_lock(&dev->struct_mutex);
2132                 i915_gem_cleanup_ringbuffer(dev);
2133                 mutex_unlock(&dev->struct_mutex);
2134                 if (I915_HAS_FBC(dev) && i915_powersave)
2135                         i915_cleanup_compression(dev);
2136                 drm_mm_takedown(&dev_priv->mm.stolen);
2137
2138                 intel_cleanup_overlay(dev);
2139
2140                 if (!I915_NEED_GFX_HWS(dev))
2141                         i915_free_hws(dev);
2142         }
2143
2144         if (dev_priv->regs != NULL)
2145                 pci_iounmap(dev->pdev, dev_priv->regs);
2146
2147         intel_teardown_gmbus(dev);
2148         intel_teardown_mchbar(dev);
2149
2150         destroy_workqueue(dev_priv->wq);
2151
2152         pci_dev_put(dev_priv->bridge_dev);
2153         kfree(dev->dev_private);
2154
2155         return 0;
2156 }
2157
2158 int i915_driver_open(struct drm_device *dev, struct drm_file *file)
2159 {
2160         struct drm_i915_file_private *file_priv;
2161
2162         DRM_DEBUG_DRIVER("\n");
2163         file_priv = kmalloc(sizeof(*file_priv), GFP_KERNEL);
2164         if (!file_priv)
2165                 return -ENOMEM;
2166
2167         file->driver_priv = file_priv;
2168
2169         spin_lock_init(&file_priv->mm.lock);
2170         INIT_LIST_HEAD(&file_priv->mm.request_list);
2171
2172         return 0;
2173 }
2174
2175 /**
2176  * i915_driver_lastclose - clean up after all DRM clients have exited
2177  * @dev: DRM device
2178  *
2179  * Take care of cleaning up after all DRM clients have exited.  In the
2180  * mode setting case, we want to restore the kernel's initial mode (just
2181  * in case the last client left us in a bad state).
2182  *
2183  * Additionally, in the non-mode setting case, we'll tear down the AGP
2184  * and DMA structures, since the kernel won't be using them, and clea
2185  * up any GEM state.
2186  */
2187 void i915_driver_lastclose(struct drm_device * dev)
2188 {
2189         drm_i915_private_t *dev_priv = dev->dev_private;
2190
2191         if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
2192                 drm_fb_helper_restore();
2193                 vga_switcheroo_process_delayed_switch();
2194                 return;
2195         }
2196
2197         i915_gem_lastclose(dev);
2198
2199         if (dev_priv->agp_heap)
2200                 i915_mem_takedown(&(dev_priv->agp_heap));
2201
2202         i915_dma_cleanup(dev);
2203 }
2204
2205 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
2206 {
2207         drm_i915_private_t *dev_priv = dev->dev_private;
2208         i915_gem_release(dev, file_priv);
2209         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2210                 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
2211 }
2212
2213 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
2214 {
2215         struct drm_i915_file_private *file_priv = file->driver_priv;
2216
2217         kfree(file_priv);
2218 }
2219
2220 struct drm_ioctl_desc i915_ioctls[] = {
2221         DRM_IOCTL_DEF_DRV(I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2222         DRM_IOCTL_DEF_DRV(I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
2223         DRM_IOCTL_DEF_DRV(I915_FLIP, i915_flip_bufs, DRM_AUTH),
2224         DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
2225         DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
2226         DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
2227         DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH),
2228         DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2229         DRM_IOCTL_DEF_DRV(I915_ALLOC, i915_mem_alloc, DRM_AUTH),
2230         DRM_IOCTL_DEF_DRV(I915_FREE, i915_mem_free, DRM_AUTH),
2231         DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2232         DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
2233         DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2234         DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2235         DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH),
2236         DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
2237         DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2238         DRM_IOCTL_DEF_DRV(I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2239         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
2240         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED),
2241         DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2242         DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2243         DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
2244         DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED),
2245         DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2246         DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2247         DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED),
2248         DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED),
2249         DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED),
2250         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED),
2251         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED),
2252         DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED),
2253         DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED),
2254         DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED),
2255         DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED),
2256         DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED),
2257         DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
2258         DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED),
2259         DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2260         DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2261 };
2262
2263 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
2264
2265 /**
2266  * Determine if the device really is AGP or not.
2267  *
2268  * All Intel graphics chipsets are treated as AGP, even if they are really
2269  * PCI-e.
2270  *
2271  * \param dev   The device to be tested.
2272  *
2273  * \returns
2274  * A value of 1 is always retured to indictate every i9x5 is AGP.
2275  */
2276 int i915_driver_device_is_agp(struct drm_device * dev)
2277 {
2278         return 1;
2279 }