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 static void i915_write_hws_pga(struct drm_device *dev)
  47 {
  48         drm_i915_private_t *dev_priv = dev->dev_private;
  49         u32 addr;
  50
  51         addr = dev_priv->status_page_dmah->busaddr;
  52         if (INTEL_INFO(dev)->gen >= 4)
  53                 addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0;
  54         I915_WRITE(HWS_PGA, addr);
  55 }
  56
  57 /**
  58  * Sets up the hardware status page for devices that need a physical address
  59  * in the register.
  60  */
  61 static int i915_init_phys_hws(struct drm_device *dev)
  62 {
  63         drm_i915_private_t *dev_priv = dev->dev_private;
  64         struct intel_ring_buffer *ring = LP_RING(dev_priv);
  65
  66         /* Program Hardware Status Page */
  67         dev_priv->status_page_dmah =
  68                 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE);
  69
  70         if (!dev_priv->status_page_dmah) {
  71                 DRM_ERROR("Can not allocate hardware status page\n");
  72                 return -ENOMEM;
  73         }
  74         ring->status_page.page_addr =
  75                 (void __force __iomem *)dev_priv->status_page_dmah->vaddr;
  76
  77         memset_io(ring->status_page.page_addr, 0, PAGE_SIZE);
  78
  79         i915_write_hws_pga(dev);
  80
  81         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
  82         return 0;
  83 }
  84
  85 /**
  86  * Frees the hardware status page, whether it's a physical address or a virtual
  87  * address set up by the X Server.
  88  */
  89 static void i915_free_hws(struct drm_device *dev)
  90 {
  91         drm_i915_private_t *dev_priv = dev->dev_private;
  92         struct intel_ring_buffer *ring = LP_RING(dev_priv);
  93
  94         if (dev_priv->status_page_dmah) {
  95                 drm_pci_free(dev, dev_priv->status_page_dmah);
  96                 dev_priv->status_page_dmah = NULL;
  97         }
  98
  99         if (ring->status_page.gfx_addr) {
 100                 ring->status_page.gfx_addr = 0;
 101                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
 102         }
 103
 104         /* Need to rewrite hardware status page */
 105         I915_WRITE(HWS_PGA, 0x1ffff000);
 106 }
 107
 108 void i915_kernel_lost_context(struct drm_device * dev)
 109 {
 110         drm_i915_private_t *dev_priv = dev->dev_private;
 111         struct drm_i915_master_private *master_priv;
 112         struct intel_ring_buffer *ring = LP_RING(dev_priv);
 113
 114         /*
 115          * We should never lose context on the ring with modesetting
 116          * as we don't expose it to userspace
 117          */
 118         if (drm_core_check_feature(dev, DRIVER_MODESET))
 119                 return;
 120
 121         ring->head = I915_READ_HEAD(ring) & HEAD_ADDR;
 122         ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
 123         ring->space = ring->head - (ring->tail + 8);
 124         if (ring->space < 0)
 125                 ring->space += ring->size;
 126
 127         if (!dev->primary->master)
 128                 return;
 129
 130         master_priv = dev->primary->master->driver_priv;
 131         if (ring->head == ring->tail && master_priv->sarea_priv)
 132                 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 133 }
 134
 135 static int i915_dma_cleanup(struct drm_device * dev)
 136 {
 137         drm_i915_private_t *dev_priv = dev->dev_private;
 138         int i;
 139
 140         /* Make sure interrupts are disabled here because the uninstall ioctl
 141          * may not have been called from userspace and after dev_private
 142          * is freed, it's too late.
 143          */
 144         if (dev->irq_enabled)
 145                 drm_irq_uninstall(dev);
 146
 147         mutex_lock(&dev->struct_mutex);
 148         for (i = 0; i < I915_NUM_RINGS; i++)
 149                 intel_cleanup_ring_buffer(&dev_priv->ring[i]);
 150         mutex_unlock(&dev->struct_mutex);
 151
 152         /* Clear the HWS virtual address at teardown */
 153         if (I915_NEED_GFX_HWS(dev))
 154                 i915_free_hws(dev);
 155
 156         return 0;
 157 }
 158
 159 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 160 {
 161         drm_i915_private_t *dev_priv = dev->dev_private;
 162         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 163         int ret;
 164
 165         master_priv->sarea = drm_getsarea(dev);
 166         if (master_priv->sarea) {
 167                 master_priv->sarea_priv = (drm_i915_sarea_t *)
 168                         ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
 169         } else {
 170                 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
 171         }
 172
 173         if (init->ring_size != 0) {
 174                 if (LP_RING(dev_priv)->obj != NULL) {
 175                         i915_dma_cleanup(dev);
 176                         DRM_ERROR("Client tried to initialize ringbuffer in "
 177                                   "GEM mode\n");
 178                         return -EINVAL;
 179                 }
 180
 181                 ret = intel_render_ring_init_dri(dev,
 182                                                  init->ring_start,
 183                                                  init->ring_size);
 184                 if (ret) {
 185                         i915_dma_cleanup(dev);
 186                         return ret;
 187                 }
 188         }
 189
 190         dev_priv->cpp = init->cpp;
 191         dev_priv->back_offset = init->back_offset;
 192         dev_priv->front_offset = init->front_offset;
 193         dev_priv->current_page = 0;
 194         if (master_priv->sarea_priv)
 195                 master_priv->sarea_priv->pf_current_page = 0;
 196
 197         /* Allow hardware batchbuffers unless told otherwise.
 198          */
 199         dev_priv->allow_batchbuffer = 1;
 200
 201         return 0;
 202 }
 203
 204 static int i915_dma_resume(struct drm_device * dev)
 205 {
 206         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 207         struct intel_ring_buffer *ring = LP_RING(dev_priv);
 208
 209         DRM_DEBUG_DRIVER("%s\n", __func__);
 210
 211         if (ring->map.handle == NULL) {
 212                 DRM_ERROR("can not ioremap virtual address for"
 213                           " ring buffer\n");
 214                 return -ENOMEM;
 215         }
 216
 217         /* Program Hardware Status Page */
 218         if (!ring->status_page.page_addr) {
 219                 DRM_ERROR("Can not find hardware status page\n");
 220                 return -EINVAL;
 221         }
 222         DRM_DEBUG_DRIVER("hw status page @ %p\n",
 223                                 ring->status_page.page_addr);
 224         if (ring->status_page.gfx_addr != 0)
 225                 intel_ring_setup_status_page(ring);
 226         else
 227                 i915_write_hws_pga(dev);
 228
 229         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 230
 231         return 0;
 232 }
 233
 234 static int i915_dma_init(struct drm_device *dev, void *data,
 235                          struct drm_file *file_priv)
 236 {
 237         drm_i915_init_t *init = data;
 238         int retcode = 0;
 239
 240         switch (init->func) {
 241         case I915_INIT_DMA:
 242                 retcode = i915_initialize(dev, init);
 243                 break;
 244         case I915_CLEANUP_DMA:
 245                 retcode = i915_dma_cleanup(dev);
 246                 break;
 247         case I915_RESUME_DMA:
 248                 retcode = i915_dma_resume(dev);
 249                 break;
 250         default:
 251                 retcode = -EINVAL;
 252                 break;
 253         }
 254
 255         return retcode;
 256 }
 257
 258 /* Implement basically the same security restrictions as hardware does
 259  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 260  *
 261  * Most of the calculations below involve calculating the size of a
 262  * particular instruction.  It's important to get the size right as
 263  * that tells us where the next instruction to check is.  Any illegal
 264  * instruction detected will be given a size of zero, which is a
 265  * signal to abort the rest of the buffer.
 266  */
 267 static int validate_cmd(int cmd)
 268 {
 269         switch (((cmd >> 29) & 0x7)) {
 270         case 0x0:
 271                 switch ((cmd >> 23) & 0x3f) {
 272                 case 0x0:
 273                         return 1;       /* MI_NOOP */
 274                 case 0x4:
 275                         return 1;       /* MI_FLUSH */
 276                 default:
 277                         return 0;       /* disallow everything else */
 278                 }
 279                 break;
 280         case 0x1:
 281                 return 0;       /* reserved */
 282         case 0x2:
 283                 return (cmd & 0xff) + 2;        /* 2d commands */
 284         case 0x3:
 285                 if (((cmd >> 24) & 0x1f) <= 0x18)
 286                         return 1;
 287
 288                 switch ((cmd >> 24) & 0x1f) {
 289                 case 0x1c:
 290                         return 1;
 291                 case 0x1d:
 292                         switch ((cmd >> 16) & 0xff) {
 293                         case 0x3:
 294                                 return (cmd & 0x1f) + 2;
 295                         case 0x4:
 296                                 return (cmd & 0xf) + 2;
 297                         default:
 298                                 return (cmd & 0xffff) + 2;
 299                         }
 300                 case 0x1e:
 301                         if (cmd & (1 << 23))
 302                                 return (cmd & 0xffff) + 1;
 303                         else
 304                                 return 1;
 305                 case 0x1f:
 306                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 307                                 return (cmd & 0x1ffff) + 2;
 308                         else if (cmd & (1 << 17))       /* indirect random */
 309                                 if ((cmd & 0xffff) == 0)
 310                                         return 0;       /* unknown length, too hard */
 311                                 else
 312                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 313                         else
 314                                 return 2;       /* indirect sequential */
 315                 default:
 316                         return 0;
 317                 }
 318         default:
 319                 return 0;
 320         }
 321
 322         return 0;
 323 }
 324
 325 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
 326 {
 327         drm_i915_private_t *dev_priv = dev->dev_private;
 328         int i, ret;
 329
 330         if ((dwords+1) * sizeof(int) >= LP_RING(dev_priv)->size - 8)
 331                 return -EINVAL;
 332
 333         for (i = 0; i < dwords;) {
 334                 int sz = validate_cmd(buffer[i]);
 335                 if (sz == 0 || i + sz > dwords)
 336                         return -EINVAL;
 337                 i += sz;
 338         }
 339
 340         ret = BEGIN_LP_RING((dwords+1)&~1);
 341         if (ret)
 342                 return ret;
 343
 344         for (i = 0; i < dwords; i++)
 345                 OUT_RING(buffer[i]);
 346         if (dwords & 1)
 347                 OUT_RING(0);
 348
 349         ADVANCE_LP_RING();
 350
 351         return 0;
 352 }
 353
 354 int
 355 i915_emit_box(struct drm_device *dev,
 356               struct drm_clip_rect *box,
 357               int DR1, int DR4)
 358 {
 359         struct drm_i915_private *dev_priv = dev->dev_private;
 360         int ret;
 361
 362         if (box->y2 <= box->y1 || box->x2 <= box->x1 ||
 363             box->y2 <= 0 || box->x2 <= 0) {
 364                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 365                           box->x1, box->y1, box->x2, box->y2);
 366                 return -EINVAL;
 367         }
 368
 369         if (INTEL_INFO(dev)->gen >= 4) {
 370                 ret = BEGIN_LP_RING(4);
 371                 if (ret)
 372                         return ret;
 373
 374                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 375                 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
 376                 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
 377                 OUT_RING(DR4);
 378         } else {
 379                 ret = BEGIN_LP_RING(6);
 380                 if (ret)
 381                         return ret;
 382
 383                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 384                 OUT_RING(DR1);
 385                 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
 386                 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
 387                 OUT_RING(DR4);
 388                 OUT_RING(0);
 389         }
 390         ADVANCE_LP_RING();
 391
 392         return 0;
 393 }
 394
 395 /* XXX: Emitting the counter should really be moved to part of the IRQ
 396  * emit. For now, do it in both places:
 397  */
 398
 399 static void i915_emit_breadcrumb(struct drm_device *dev)
 400 {
 401         drm_i915_private_t *dev_priv = dev->dev_private;
 402         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 403
 404         dev_priv->counter++;
 405         if (dev_priv->counter > 0x7FFFFFFFUL)
 406                 dev_priv->counter = 0;
 407         if (master_priv->sarea_priv)
 408                 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
 409
 410         if (BEGIN_LP_RING(4) == 0) {
 411                 OUT_RING(MI_STORE_DWORD_INDEX);
 412                 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 413                 OUT_RING(dev_priv->counter);
 414                 OUT_RING(0);
 415                 ADVANCE_LP_RING();
 416         }
 417 }
 418
 419 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 420                                    drm_i915_cmdbuffer_t *cmd,
 421                                    struct drm_clip_rect *cliprects,
 422                                    void *cmdbuf)
 423 {
 424         int nbox = cmd->num_cliprects;
 425         int i = 0, count, ret;
 426
 427         if (cmd->sz & 0x3) {
 428                 DRM_ERROR("alignment");
 429                 return -EINVAL;
 430         }
 431
 432         i915_kernel_lost_context(dev);
 433
 434         count = nbox ? nbox : 1;
 435
 436         for (i = 0; i < count; i++) {
 437                 if (i < nbox) {
 438                         ret = i915_emit_box(dev, &cliprects[i],
 439                                             cmd->DR1, cmd->DR4);
 440                         if (ret)
 441                                 return ret;
 442                 }
 443
 444                 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
 445                 if (ret)
 446                         return ret;
 447         }
 448
 449         i915_emit_breadcrumb(dev);
 450         return 0;
 451 }
 452
 453 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 454                                      drm_i915_batchbuffer_t * batch,
 455                                      struct drm_clip_rect *cliprects)
 456 {
 457         struct drm_i915_private *dev_priv = dev->dev_private;
 458         int nbox = batch->num_cliprects;
 459         int i, count, ret;
 460
 461         if ((batch->start | batch->used) & 0x7) {
 462                 DRM_ERROR("alignment");
 463                 return -EINVAL;
 464         }
 465
 466         i915_kernel_lost_context(dev);
 467
 468         count = nbox ? nbox : 1;
 469         for (i = 0; i < count; i++) {
 470                 if (i < nbox) {
 471                         ret = i915_emit_box(dev, &cliprects[i],
 472                                             batch->DR1, batch->DR4);
 473                         if (ret)
 474                                 return ret;
 475                 }
 476
 477                 if (!IS_I830(dev) && !IS_845G(dev)) {
 478                         ret = BEGIN_LP_RING(2);
 479                         if (ret)
 480                                 return ret;
 481
 482                         if (INTEL_INFO(dev)->gen >= 4) {
 483                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 484                                 OUT_RING(batch->start);
 485                         } else {
 486                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 487                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 488                         }
 489                 } else {
 490                         ret = BEGIN_LP_RING(4);
 491                         if (ret)
 492                                 return ret;
 493
 494                         OUT_RING(MI_BATCH_BUFFER);
 495                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 496                         OUT_RING(batch->start + batch->used - 4);
 497                         OUT_RING(0);
 498                 }
 499                 ADVANCE_LP_RING();
 500         }
 501
 502
 503         if (IS_G4X(dev) || IS_GEN5(dev)) {
 504                 if (BEGIN_LP_RING(2) == 0) {
 505                         OUT_RING(MI_FLUSH | MI_NO_WRITE_FLUSH | MI_INVALIDATE_ISP);
 506                         OUT_RING(MI_NOOP);
 507                         ADVANCE_LP_RING();
 508                 }
 509         }
 510
 511         i915_emit_breadcrumb(dev);
 512         return 0;
 513 }
 514
 515 static int i915_dispatch_flip(struct drm_device * dev)
 516 {
 517         drm_i915_private_t *dev_priv = dev->dev_private;
 518         struct drm_i915_master_private *master_priv =
 519                 dev->primary->master->driver_priv;
 520         int ret;
 521
 522         if (!master_priv->sarea_priv)
 523                 return -EINVAL;
 524
 525         DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
 526                           __func__,
 527                          dev_priv->current_page,
 528                          master_priv->sarea_priv->pf_current_page);
 529
 530         i915_kernel_lost_context(dev);
 531
 532         ret = BEGIN_LP_RING(10);
 533         if (ret)
 534                 return ret;
 535
 536         OUT_RING(MI_FLUSH | MI_READ_FLUSH);
 537         OUT_RING(0);
 538
 539         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 540         OUT_RING(0);
 541         if (dev_priv->current_page == 0) {
 542                 OUT_RING(dev_priv->back_offset);
 543                 dev_priv->current_page = 1;
 544         } else {
 545                 OUT_RING(dev_priv->front_offset);
 546                 dev_priv->current_page = 0;
 547         }
 548         OUT_RING(0);
 549
 550         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 551         OUT_RING(0);
 552
 553         ADVANCE_LP_RING();
 554
 555         master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 556
 557         if (BEGIN_LP_RING(4) == 0) {
 558                 OUT_RING(MI_STORE_DWORD_INDEX);
 559                 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 560                 OUT_RING(dev_priv->counter);
 561                 OUT_RING(0);
 562                 ADVANCE_LP_RING();
 563         }
 564
 565         master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 566         return 0;
 567 }
 568
 569 static int i915_quiescent(struct drm_device *dev)
 570 {
 571         struct intel_ring_buffer *ring = LP_RING(dev->dev_private);
 572
 573         i915_kernel_lost_context(dev);
 574         return intel_wait_ring_buffer(ring, ring->size - 8);
 575 }
 576
 577 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 578                             struct drm_file *file_priv)
 579 {
 580         int ret;
 581
 582         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 583
 584         mutex_lock(&dev->struct_mutex);
 585         ret = i915_quiescent(dev);
 586         mutex_unlock(&dev->struct_mutex);
 587
 588         return ret;
 589 }
 590
 591 static int i915_batchbuffer(struct drm_device *dev, void *data,
 592                             struct drm_file *file_priv)
 593 {
 594         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 595         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 596         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 597             master_priv->sarea_priv;
 598         drm_i915_batchbuffer_t *batch = data;
 599         int ret;
 600         struct drm_clip_rect *cliprects = NULL;
 601
 602         if (!dev_priv->allow_batchbuffer) {
 603                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 604                 return -EINVAL;
 605         }
 606
 607         DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
 608                         batch->start, batch->used, batch->num_cliprects);
 609
 610         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 611
 612         if (batch->num_cliprects < 0)
 613                 return -EINVAL;
 614
 615         if (batch->num_cliprects) {
 616                 cliprects = kcalloc(batch->num_cliprects,
 617                                     sizeof(struct drm_clip_rect),
 618                                     GFP_KERNEL);
 619                 if (cliprects == NULL)
 620                         return -ENOMEM;
 621
 622                 ret = copy_from_user(cliprects, batch->cliprects,
 623                                      batch->num_cliprects *
 624                                      sizeof(struct drm_clip_rect));
 625                 if (ret != 0) {
 626                         ret = -EFAULT;
 627                         goto fail_free;
 628                 }
 629         }
 630
 631         mutex_lock(&dev->struct_mutex);
 632         ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
 633         mutex_unlock(&dev->struct_mutex);
 634
 635         if (sarea_priv)
 636                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 637
 638 fail_free:
 639         kfree(cliprects);
 640
 641         return ret;
 642 }
 643
 644 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 645                           struct drm_file *file_priv)
 646 {
 647         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 648         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 649         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 650             master_priv->sarea_priv;
 651         drm_i915_cmdbuffer_t *cmdbuf = data;
 652         struct drm_clip_rect *cliprects = NULL;
 653         void *batch_data;
 654         int ret;
 655
 656         DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 657                         cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 658
 659         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 660
 661         if (cmdbuf->num_cliprects < 0)
 662                 return -EINVAL;
 663
 664         batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
 665         if (batch_data == NULL)
 666                 return -ENOMEM;
 667
 668         ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
 669         if (ret != 0) {
 670                 ret = -EFAULT;
 671                 goto fail_batch_free;
 672         }
 673
 674         if (cmdbuf->num_cliprects) {
 675                 cliprects = kcalloc(cmdbuf->num_cliprects,
 676                                     sizeof(struct drm_clip_rect), GFP_KERNEL);
 677                 if (cliprects == NULL) {
 678                         ret = -ENOMEM;
 679                         goto fail_batch_free;
 680                 }
 681
 682                 ret = copy_from_user(cliprects, cmdbuf->cliprects,
 683                                      cmdbuf->num_cliprects *
 684                                      sizeof(struct drm_clip_rect));
 685                 if (ret != 0) {
 686                         ret = -EFAULT;
 687                         goto fail_clip_free;
 688                 }
 689         }
 690
 691         mutex_lock(&dev->struct_mutex);
 692         ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
 693         mutex_unlock(&dev->struct_mutex);
 694         if (ret) {
 695                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 696                 goto fail_clip_free;
 697         }
 698
 699         if (sarea_priv)
 700                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 701
 702 fail_clip_free:
 703         kfree(cliprects);
 704 fail_batch_free:
 705         kfree(batch_data);
 706
 707         return ret;
 708 }
 709
 710 static int i915_flip_bufs(struct drm_device *dev, void *data,
 711                           struct drm_file *file_priv)
 712 {
 713         int ret;
 714
 715         DRM_DEBUG_DRIVER("%s\n", __func__);
 716
 717         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 718
 719         mutex_lock(&dev->struct_mutex);
 720         ret = i915_dispatch_flip(dev);
 721         mutex_unlock(&dev->struct_mutex);
 722
 723         return ret;
 724 }
 725
 726 static int i915_getparam(struct drm_device *dev, void *data,
 727                          struct drm_file *file_priv)
 728 {
 729         drm_i915_private_t *dev_priv = dev->dev_private;
 730         drm_i915_getparam_t *param = data;
 731         int value;
 732
 733         if (!dev_priv) {
 734                 DRM_ERROR("called with no initialization\n");
 735                 return -EINVAL;
 736         }
 737
 738         switch (param->param) {
 739         case I915_PARAM_IRQ_ACTIVE:
 740                 value = dev->pdev->irq ? 1 : 0;
 741                 break;
 742         case I915_PARAM_ALLOW_BATCHBUFFER:
 743                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 744                 break;
 745         case I915_PARAM_LAST_DISPATCH:
 746                 value = READ_BREADCRUMB(dev_priv);
 747                 break;
 748         case I915_PARAM_CHIPSET_ID:
 749                 value = dev->pci_device;
 750                 break;
 751         case I915_PARAM_HAS_GEM:
 752                 value = dev_priv->has_gem;
 753                 break;
 754         case I915_PARAM_NUM_FENCES_AVAIL:
 755                 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
 756                 break;
 757         case I915_PARAM_HAS_OVERLAY:
 758                 value = dev_priv->overlay ? 1 : 0;
 759                 break;
 760         case I915_PARAM_HAS_PAGEFLIPPING:
 761                 value = 1;
 762                 break;
 763         case I915_PARAM_HAS_EXECBUF2:
 764                 /* depends on GEM */
 765                 value = dev_priv->has_gem;
 766                 break;
 767         case I915_PARAM_HAS_BSD:
 768                 value = HAS_BSD(dev);
 769                 break;
 770         case I915_PARAM_HAS_BLT:
 771                 value = HAS_BLT(dev);
 772                 break;
 773         case I915_PARAM_HAS_RELAXED_FENCING:
 774                 value = 1;
 775                 break;
 776         case I915_PARAM_HAS_COHERENT_RINGS:
 777                 value = 1;
 778                 break;
 779         case I915_PARAM_HAS_EXEC_CONSTANTS:
 780                 value = INTEL_INFO(dev)->gen >= 4;
 781                 break;
 782         case I915_PARAM_HAS_RELAXED_DELTA:
 783                 value = 1;
 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 =
 874                 (void __force __iomem *)dev_priv->hws_map.handle;
 875         memset_io(ring->status_page.page_addr, 0, PAGE_SIZE);
 876         I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
 877
 878         DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
 879                          ring->status_page.gfx_addr);
 880         DRM_DEBUG_DRIVER("load hws at %p\n",
 881                          ring->status_page.page_addr);
 882         return 0;
 883 }
 884
 885 static int i915_get_bridge_dev(struct drm_device *dev)
 886 {
 887         struct drm_i915_private *dev_priv = dev->dev_private;
 888
 889         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 890         if (!dev_priv->bridge_dev) {
 891                 DRM_ERROR("bridge device not found\n");
 892                 return -1;
 893         }
 894         return 0;
 895 }
 896
 897 #define MCHBAR_I915 0x44
 898 #define MCHBAR_I965 0x48
 899 #define MCHBAR_SIZE (4*4096)
 900
 901 #define DEVEN_REG 0x54
 902 #define   DEVEN_MCHBAR_EN (1 << 28)
 903
 904 /* Allocate space for the MCH regs if needed, return nonzero on error */
 905 static int
 906 intel_alloc_mchbar_resource(struct drm_device *dev)
 907 {
 908         drm_i915_private_t *dev_priv = dev->dev_private;
 909         int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 910         u32 temp_lo, temp_hi = 0;
 911         u64 mchbar_addr;
 912         int ret;
 913
 914         if (INTEL_INFO(dev)->gen >= 4)
 915                 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
 916         pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
 917         mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
 918
 919         /* If ACPI doesn't have it, assume we need to allocate it ourselves */
 920 #ifdef CONFIG_PNP
 921         if (mchbar_addr &&
 922             pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
 923                 return 0;
 924 #endif
 925
 926         /* Get some space for it */
 927         dev_priv->mch_res.name = "i915 MCHBAR";
 928         dev_priv->mch_res.flags = IORESOURCE_MEM;
 929         ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
 930                                      &dev_priv->mch_res,
 931                                      MCHBAR_SIZE, MCHBAR_SIZE,
 932                                      PCIBIOS_MIN_MEM,
 933                                      0, pcibios_align_resource,
 934                                      dev_priv->bridge_dev);
 935         if (ret) {
 936                 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
 937                 dev_priv->mch_res.start = 0;
 938                 return ret;
 939         }
 940
 941         if (INTEL_INFO(dev)->gen >= 4)
 942                 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
 943                                        upper_32_bits(dev_priv->mch_res.start));
 944
 945         pci_write_config_dword(dev_priv->bridge_dev, reg,
 946                                lower_32_bits(dev_priv->mch_res.start));
 947         return 0;
 948 }
 949
 950 /* Setup MCHBAR if possible, return true if we should disable it again */
 951 static void
 952 intel_setup_mchbar(struct drm_device *dev)
 953 {
 954         drm_i915_private_t *dev_priv = dev->dev_private;
 955         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 956         u32 temp;
 957         bool enabled;
 958
 959         dev_priv->mchbar_need_disable = false;
 960
 961         if (IS_I915G(dev) || IS_I915GM(dev)) {
 962                 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
 963                 enabled = !!(temp & DEVEN_MCHBAR_EN);
 964         } else {
 965                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 966                 enabled = temp & 1;
 967         }
 968
 969         /* If it's already enabled, don't have to do anything */
 970         if (enabled)
 971                 return;
 972
 973         if (intel_alloc_mchbar_resource(dev))
 974                 return;
 975
 976         dev_priv->mchbar_need_disable = true;
 977
 978         /* Space is allocated or reserved, so enable it. */
 979         if (IS_I915G(dev) || IS_I915GM(dev)) {
 980                 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
 981                                        temp | DEVEN_MCHBAR_EN);
 982         } else {
 983                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 984                 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
 985         }
 986 }
 987
 988 static void
 989 intel_teardown_mchbar(struct drm_device *dev)
 990 {
 991         drm_i915_private_t *dev_priv = dev->dev_private;
 992         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 993         u32 temp;
 994
 995         if (dev_priv->mchbar_need_disable) {
 996                 if (IS_I915G(dev) || IS_I915GM(dev)) {
 997                         pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
 998                         temp &= ~DEVEN_MCHBAR_EN;
 999                         pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
1000                 } else {
1001                         pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1002                         temp &= ~1;
1003                         pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
1004                 }
1005         }
1006
1007         if (dev_priv->mch_res.start)
1008                 release_resource(&dev_priv->mch_res);
1009 }
1010
1011 #define PTE_ADDRESS_MASK                0xfffff000
1012 #define PTE_ADDRESS_MASK_HIGH           0x000000f0 /* i915+ */
1013 #define PTE_MAPPING_TYPE_UNCACHED       (0 << 1)
1014 #define PTE_MAPPING_TYPE_DCACHE         (1 << 1) /* i830 only */
1015 #define PTE_MAPPING_TYPE_CACHED         (3 << 1)
1016 #define PTE_MAPPING_TYPE_MASK           (3 << 1)
1017 #define PTE_VALID                       (1 << 0)
1018
1019 /**
1020  * i915_stolen_to_phys - take an offset into stolen memory and turn it into
1021  *                       a physical one
1022  * @dev: drm device
1023  * @offset: address to translate
1024  *
1025  * Some chip functions require allocations from stolen space and need the
1026  * physical address of the memory in question.
1027  */
1028 static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset)
1029 {
1030         struct drm_i915_private *dev_priv = dev->dev_private;
1031         struct pci_dev *pdev = dev_priv->bridge_dev;
1032         u32 base;
1033
1034 #if 0
1035         /* On the machines I have tested the Graphics Base of Stolen Memory
1036          * is unreliable, so compute the base by subtracting the stolen memory
1037          * from the Top of Low Usable DRAM which is where the BIOS places
1038          * the graphics stolen memory.
1039          */
1040         if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1041                 /* top 32bits are reserved = 0 */
1042                 pci_read_config_dword(pdev, 0xA4, &base);
1043         } else {
1044                 /* XXX presume 8xx is the same as i915 */
1045                 pci_bus_read_config_dword(pdev->bus, 2, 0x5C, &base);
1046         }
1047 #else
1048         if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1049                 u16 val;
1050                 pci_read_config_word(pdev, 0xb0, &val);
1051                 base = val >> 4 << 20;
1052         } else {
1053                 u8 val;
1054                 pci_read_config_byte(pdev, 0x9c, &val);
1055                 base = val >> 3 << 27;
1056         }
1057         base -= dev_priv->mm.gtt->stolen_size;
1058 #endif
1059
1060         return base + offset;
1061 }
1062
1063 static void i915_warn_stolen(struct drm_device *dev)
1064 {
1065         DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1066         DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1067 }
1068
1069 static void i915_setup_compression(struct drm_device *dev, int size)
1070 {
1071         struct drm_i915_private *dev_priv = dev->dev_private;
1072         struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb);
1073         unsigned long cfb_base;
1074         unsigned long ll_base = 0;
1075
1076         compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0);
1077         if (compressed_fb)
1078                 compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1079         if (!compressed_fb)
1080                 goto err;
1081
1082         cfb_base = i915_stolen_to_phys(dev, compressed_fb->start);
1083         if (!cfb_base)
1084                 goto err_fb;
1085
1086         if (!(IS_GM45(dev) || HAS_PCH_SPLIT(dev))) {
1087                 compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen,
1088                                                     4096, 4096, 0);
1089                 if (compressed_llb)
1090                         compressed_llb = drm_mm_get_block(compressed_llb,
1091                                                           4096, 4096);
1092                 if (!compressed_llb)
1093                         goto err_fb;
1094
1095                 ll_base = i915_stolen_to_phys(dev, compressed_llb->start);
1096                 if (!ll_base)
1097                         goto err_llb;
1098         }
1099
1100         dev_priv->cfb_size = size;
1101
1102         intel_disable_fbc(dev);
1103         dev_priv->compressed_fb = compressed_fb;
1104         if (HAS_PCH_SPLIT(dev))
1105                 I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start);
1106         else if (IS_GM45(dev)) {
1107                 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1108         } else {
1109                 I915_WRITE(FBC_CFB_BASE, cfb_base);
1110                 I915_WRITE(FBC_LL_BASE, ll_base);
1111                 dev_priv->compressed_llb = compressed_llb;
1112         }
1113
1114         DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n",
1115                       cfb_base, ll_base, size >> 20);
1116         return;
1117
1118 err_llb:
1119         drm_mm_put_block(compressed_llb);
1120 err_fb:
1121         drm_mm_put_block(compressed_fb);
1122 err:
1123         dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1124         i915_warn_stolen(dev);
1125 }
1126
1127 static void i915_cleanup_compression(struct drm_device *dev)
1128 {
1129         struct drm_i915_private *dev_priv = dev->dev_private;
1130
1131         drm_mm_put_block(dev_priv->compressed_fb);
1132         if (dev_priv->compressed_llb)
1133                 drm_mm_put_block(dev_priv->compressed_llb);
1134 }
1135
1136 /* true = enable decode, false = disable decoder */
1137 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1138 {
1139         struct drm_device *dev = cookie;
1140
1141         intel_modeset_vga_set_state(dev, state);
1142         if (state)
1143                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1144                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1145         else
1146                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1147 }
1148
1149 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1150 {
1151         struct drm_device *dev = pci_get_drvdata(pdev);
1152         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
1153         if (state == VGA_SWITCHEROO_ON) {
1154                 printk(KERN_INFO "i915: switched on\n");
1155                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1156                 /* i915 resume handler doesn't set to D0 */
1157                 pci_set_power_state(dev->pdev, PCI_D0);
1158                 i915_resume(dev);
1159                 dev->switch_power_state = DRM_SWITCH_POWER_ON;
1160         } else {
1161                 printk(KERN_ERR "i915: switched off\n");
1162                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1163                 i915_suspend(dev, pmm);
1164                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
1165         }
1166 }
1167
1168 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
1169 {
1170         struct drm_device *dev = pci_get_drvdata(pdev);
1171         bool can_switch;
1172
1173         spin_lock(&dev->count_lock);
1174         can_switch = (dev->open_count == 0);
1175         spin_unlock(&dev->count_lock);
1176         return can_switch;
1177 }
1178
1179 static int i915_load_modeset_init(struct drm_device *dev)
1180 {
1181         struct drm_i915_private *dev_priv = dev->dev_private;
1182         unsigned long prealloc_size, gtt_size, mappable_size;
1183         int ret = 0;
1184
1185         prealloc_size = dev_priv->mm.gtt->stolen_size;
1186         gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT;
1187         mappable_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1188
1189         /* Basic memrange allocator for stolen space */
1190         drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size);
1191
1192         /* Let GEM Manage all of the aperture.
1193          *
1194          * However, leave one page at the end still bound to the scratch page.
1195          * There are a number of places where the hardware apparently
1196          * prefetches past the end of the object, and we've seen multiple
1197          * hangs with the GPU head pointer stuck in a batchbuffer bound
1198          * at the last page of the aperture.  One page should be enough to
1199          * keep any prefetching inside of the aperture.
1200          */
1201         i915_gem_do_init(dev, 0, mappable_size, gtt_size - PAGE_SIZE);
1202
1203         mutex_lock(&dev->struct_mutex);
1204         ret = i915_gem_init_ringbuffer(dev);
1205         mutex_unlock(&dev->struct_mutex);
1206         if (ret)
1207                 goto out;
1208
1209         /* Try to set up FBC with a reasonable compressed buffer size */
1210         if (I915_HAS_FBC(dev) && i915_powersave) {
1211                 int cfb_size;
1212
1213                 /* Leave 1M for line length buffer & misc. */
1214
1215                 /* Try to get a 32M buffer... */
1216                 if (prealloc_size > (36*1024*1024))
1217                         cfb_size = 32*1024*1024;
1218                 else /* fall back to 7/8 of the stolen space */
1219                         cfb_size = prealloc_size * 7 / 8;
1220                 i915_setup_compression(dev, cfb_size);
1221         }
1222
1223         /* Allow hardware batchbuffers unless told otherwise. */
1224         dev_priv->allow_batchbuffer = 1;
1225
1226         ret = intel_parse_bios(dev);
1227         if (ret)
1228                 DRM_INFO("failed to find VBIOS tables\n");
1229
1230         /* If we have > 1 VGA cards, then we need to arbitrate access
1231          * to the common VGA resources.
1232          *
1233          * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
1234          * then we do not take part in VGA arbitration and the
1235          * vga_client_register() fails with -ENODEV.
1236          */
1237         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1238         if (ret && ret != -ENODEV)
1239                 goto cleanup_ringbuffer;
1240
1241         intel_register_dsm_handler();
1242
1243         ret = vga_switcheroo_register_client(dev->pdev,
1244                                              i915_switcheroo_set_state,
1245                                              NULL,
1246                                              i915_switcheroo_can_switch);
1247         if (ret)
1248                 goto cleanup_vga_client;
1249
1250         /* IIR "flip pending" bit means done if this bit is set */
1251         if (IS_GEN3(dev) && (I915_READ(ECOSKPD) & ECO_FLIP_DONE))
1252                 dev_priv->flip_pending_is_done = true;
1253
1254         intel_modeset_init(dev);
1255
1256         ret = drm_irq_install(dev);
1257         if (ret)
1258                 goto cleanup_vga_switcheroo;
1259
1260         /* Always safe in the mode setting case. */
1261         /* FIXME: do pre/post-mode set stuff in core KMS code */
1262         dev->vblank_disable_allowed = 1;
1263
1264         ret = intel_fbdev_init(dev);
1265         if (ret)
1266                 goto cleanup_irq;
1267
1268         drm_kms_helper_poll_init(dev);
1269
1270         /* We're off and running w/KMS */
1271         dev_priv->mm.suspended = 0;
1272
1273         return 0;
1274
1275 cleanup_irq:
1276         drm_irq_uninstall(dev);
1277 cleanup_vga_switcheroo:
1278         vga_switcheroo_unregister_client(dev->pdev);
1279 cleanup_vga_client:
1280         vga_client_register(dev->pdev, NULL, NULL, NULL);
1281 cleanup_ringbuffer:
1282         mutex_lock(&dev->struct_mutex);
1283         i915_gem_cleanup_ringbuffer(dev);
1284         mutex_unlock(&dev->struct_mutex);
1285 out:
1286         return ret;
1287 }
1288
1289 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1290 {
1291         struct drm_i915_master_private *master_priv;
1292
1293         master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1294         if (!master_priv)
1295                 return -ENOMEM;
1296
1297         master->driver_priv = master_priv;
1298         return 0;
1299 }
1300
1301 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1302 {
1303         struct drm_i915_master_private *master_priv = master->driver_priv;
1304
1305         if (!master_priv)
1306                 return;
1307
1308         kfree(master_priv);
1309
1310         master->driver_priv = NULL;
1311 }
1312
1313 static void i915_pineview_get_mem_freq(struct drm_device *dev)
1314 {
1315         drm_i915_private_t *dev_priv = dev->dev_private;
1316         u32 tmp;
1317
1318         tmp = I915_READ(CLKCFG);
1319
1320         switch (tmp & CLKCFG_FSB_MASK) {
1321         case CLKCFG_FSB_533:
1322                 dev_priv->fsb_freq = 533; /* 133*4 */
1323                 break;
1324         case CLKCFG_FSB_800:
1325                 dev_priv->fsb_freq = 800; /* 200*4 */
1326                 break;
1327         case CLKCFG_FSB_667:
1328                 dev_priv->fsb_freq =  667; /* 167*4 */
1329                 break;
1330         case CLKCFG_FSB_400:
1331                 dev_priv->fsb_freq = 400; /* 100*4 */
1332                 break;
1333         }
1334
1335         switch (tmp & CLKCFG_MEM_MASK) {
1336         case CLKCFG_MEM_533:
1337                 dev_priv->mem_freq = 533;
1338                 break;
1339         case CLKCFG_MEM_667:
1340                 dev_priv->mem_freq = 667;
1341                 break;
1342         case CLKCFG_MEM_800:
1343                 dev_priv->mem_freq = 800;
1344                 break;
1345         }
1346
1347         /* detect pineview DDR3 setting */
1348         tmp = I915_READ(CSHRDDR3CTL);
1349         dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
1350 }
1351
1352 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
1353 {
1354         drm_i915_private_t *dev_priv = dev->dev_private;
1355         u16 ddrpll, csipll;
1356
1357         ddrpll = I915_READ16(DDRMPLL1);
1358         csipll = I915_READ16(CSIPLL0);
1359
1360         switch (ddrpll & 0xff) {
1361         case 0xc:
1362                 dev_priv->mem_freq = 800;
1363                 break;
1364         case 0x10:
1365                 dev_priv->mem_freq = 1066;
1366                 break;
1367         case 0x14:
1368                 dev_priv->mem_freq = 1333;
1369                 break;
1370         case 0x18:
1371                 dev_priv->mem_freq = 1600;
1372                 break;
1373         default:
1374                 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
1375                                  ddrpll & 0xff);
1376                 dev_priv->mem_freq = 0;
1377                 break;
1378         }
1379
1380         dev_priv->r_t = dev_priv->mem_freq;
1381
1382         switch (csipll & 0x3ff) {
1383         case 0x00c:
1384                 dev_priv->fsb_freq = 3200;
1385                 break;
1386         case 0x00e:
1387                 dev_priv->fsb_freq = 3733;
1388                 break;
1389         case 0x010:
1390                 dev_priv->fsb_freq = 4266;
1391                 break;
1392         case 0x012:
1393                 dev_priv->fsb_freq = 4800;
1394                 break;
1395         case 0x014:
1396                 dev_priv->fsb_freq = 5333;
1397                 break;
1398         case 0x016:
1399                 dev_priv->fsb_freq = 5866;
1400                 break;
1401         case 0x018:
1402                 dev_priv->fsb_freq = 6400;
1403                 break;
1404         default:
1405                 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
1406                                  csipll & 0x3ff);
1407                 dev_priv->fsb_freq = 0;
1408                 break;
1409         }
1410
1411         if (dev_priv->fsb_freq == 3200) {
1412                 dev_priv->c_m = 0;
1413         } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
1414                 dev_priv->c_m = 1;
1415         } else {
1416                 dev_priv->c_m = 2;
1417         }
1418 }
1419
1420 static const struct cparams {
1421         u16 i;
1422         u16 t;
1423         u16 m;
1424         u16 c;
1425 } cparams[] = {
1426         { 1, 1333, 301, 28664 },
1427         { 1, 1066, 294, 24460 },
1428         { 1, 800, 294, 25192 },
1429         { 0, 1333, 276, 27605 },
1430         { 0, 1066, 276, 27605 },
1431         { 0, 800, 231, 23784 },
1432 };
1433
1434 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
1435 {
1436         u64 total_count, diff, ret;
1437         u32 count1, count2, count3, m = 0, c = 0;
1438         unsigned long now = jiffies_to_msecs(jiffies), diff1;
1439         int i;
1440
1441         diff1 = now - dev_priv->last_time1;
1442
1443         count1 = I915_READ(DMIEC);
1444         count2 = I915_READ(DDREC);
1445         count3 = I915_READ(CSIEC);
1446
1447         total_count = count1 + count2 + count3;
1448
1449         /* FIXME: handle per-counter overflow */
1450         if (total_count < dev_priv->last_count1) {
1451                 diff = ~0UL - dev_priv->last_count1;
1452                 diff += total_count;
1453         } else {
1454                 diff = total_count - dev_priv->last_count1;
1455         }
1456
1457         for (i = 0; i < ARRAY_SIZE(cparams); i++) {
1458                 if (cparams[i].i == dev_priv->c_m &&
1459                     cparams[i].t == dev_priv->r_t) {
1460                         m = cparams[i].m;
1461                         c = cparams[i].c;
1462                         break;
1463                 }
1464         }
1465
1466         diff = div_u64(diff, diff1);
1467         ret = ((m * diff) + c);
1468         ret = div_u64(ret, 10);
1469
1470         dev_priv->last_count1 = total_count;
1471         dev_priv->last_time1 = now;
1472
1473         return ret;
1474 }
1475
1476 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
1477 {
1478         unsigned long m, x, b;
1479         u32 tsfs;
1480
1481         tsfs = I915_READ(TSFS);
1482
1483         m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
1484         x = I915_READ8(TR1);
1485
1486         b = tsfs & TSFS_INTR_MASK;
1487
1488         return ((m * x) / 127) - b;
1489 }
1490
1491 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
1492 {
1493         static const struct v_table {
1494                 u16 vd; /* in .1 mil */
1495                 u16 vm; /* in .1 mil */
1496         } v_table[] = {
1497                 { 0, 0, },
1498                 { 375, 0, },
1499                 { 500, 0, },
1500                 { 625, 0, },
1501                 { 750, 0, },
1502                 { 875, 0, },
1503                 { 1000, 0, },
1504                 { 1125, 0, },
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                 { 4125, 3000, },
1519                 { 4125, 3000, },
1520                 { 4125, 3000, },
1521                 { 4125, 3000, },
1522                 { 4125, 3000, },
1523                 { 4125, 3000, },
1524                 { 4125, 3000, },
1525                 { 4125, 3000, },
1526                 { 4125, 3000, },
1527                 { 4125, 3000, },
1528                 { 4125, 3000, },
1529                 { 4250, 3125, },
1530                 { 4375, 3250, },
1531                 { 4500, 3375, },
1532                 { 4625, 3500, },
1533                 { 4750, 3625, },
1534                 { 4875, 3750, },
1535                 { 5000, 3875, },
1536                 { 5125, 4000, },
1537                 { 5250, 4125, },
1538                 { 5375, 4250, },
1539                 { 5500, 4375, },
1540                 { 5625, 4500, },
1541                 { 5750, 4625, },
1542                 { 5875, 4750, },
1543                 { 6000, 4875, },
1544                 { 6125, 5000, },
1545                 { 6250, 5125, },
1546                 { 6375, 5250, },
1547                 { 6500, 5375, },
1548                 { 6625, 5500, },
1549                 { 6750, 5625, },
1550                 { 6875, 5750, },
1551                 { 7000, 5875, },
1552                 { 7125, 6000, },
1553                 { 7250, 6125, },
1554                 { 7375, 6250, },
1555                 { 7500, 6375, },
1556                 { 7625, 6500, },
1557                 { 7750, 6625, },
1558                 { 7875, 6750, },
1559                 { 8000, 6875, },
1560                 { 8125, 7000, },
1561                 { 8250, 7125, },
1562                 { 8375, 7250, },
1563                 { 8500, 7375, },
1564                 { 8625, 7500, },
1565                 { 8750, 7625, },
1566                 { 8875, 7750, },
1567                 { 9000, 7875, },
1568                 { 9125, 8000, },
1569                 { 9250, 8125, },
1570                 { 9375, 8250, },
1571                 { 9500, 8375, },
1572                 { 9625, 8500, },
1573                 { 9750, 8625, },
1574                 { 9875, 8750, },
1575                 { 10000, 8875, },
1576                 { 10125, 9000, },
1577                 { 10250, 9125, },
1578                 { 10375, 9250, },
1579                 { 10500, 9375, },
1580                 { 10625, 9500, },
1581                 { 10750, 9625, },
1582                 { 10875, 9750, },
1583                 { 11000, 9875, },
1584                 { 11125, 10000, },
1585                 { 11250, 10125, },
1586                 { 11375, 10250, },
1587                 { 11500, 10375, },
1588                 { 11625, 10500, },
1589                 { 11750, 10625, },
1590                 { 11875, 10750, },
1591                 { 12000, 10875, },
1592                 { 12125, 11000, },
1593                 { 12250, 11125, },
1594                 { 12375, 11250, },
1595                 { 12500, 11375, },
1596                 { 12625, 11500, },
1597                 { 12750, 11625, },
1598                 { 12875, 11750, },
1599                 { 13000, 11875, },
1600                 { 13125, 12000, },
1601                 { 13250, 12125, },
1602                 { 13375, 12250, },
1603                 { 13500, 12375, },
1604                 { 13625, 12500, },
1605                 { 13750, 12625, },
1606                 { 13875, 12750, },
1607                 { 14000, 12875, },
1608                 { 14125, 13000, },
1609                 { 14250, 13125, },
1610                 { 14375, 13250, },
1611                 { 14500, 13375, },
1612                 { 14625, 13500, },
1613                 { 14750, 13625, },
1614                 { 14875, 13750, },
1615                 { 15000, 13875, },
1616                 { 15125, 14000, },
1617                 { 15250, 14125, },
1618                 { 15375, 14250, },
1619                 { 15500, 14375, },
1620                 { 15625, 14500, },
1621                 { 15750, 14625, },
1622                 { 15875, 14750, },
1623                 { 16000, 14875, },
1624                 { 16125, 15000, },
1625         };
1626         if (dev_priv->info->is_mobile)
1627                 return v_table[pxvid].vm;
1628         else
1629                 return v_table[pxvid].vd;
1630 }
1631
1632 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
1633 {
1634         struct timespec now, diff1;
1635         u64 diff;
1636         unsigned long diffms;
1637         u32 count;
1638
1639         getrawmonotonic(&now);
1640         diff1 = timespec_sub(now, dev_priv->last_time2);
1641
1642         /* Don't divide by 0 */
1643         diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
1644         if (!diffms)
1645                 return;
1646
1647         count = I915_READ(GFXEC);
1648
1649         if (count < dev_priv->last_count2) {
1650                 diff = ~0UL - dev_priv->last_count2;
1651                 diff += count;
1652         } else {
1653                 diff = count - dev_priv->last_count2;
1654         }
1655
1656         dev_priv->last_count2 = count;
1657         dev_priv->last_time2 = now;
1658
1659         /* More magic constants... */
1660         diff = diff * 1181;
1661         diff = div_u64(diff, diffms * 10);
1662         dev_priv->gfx_power = diff;
1663 }
1664
1665 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
1666 {
1667         unsigned long t, corr, state1, corr2, state2;
1668         u32 pxvid, ext_v;
1669
1670         pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->cur_delay * 4));
1671         pxvid = (pxvid >> 24) & 0x7f;
1672         ext_v = pvid_to_extvid(dev_priv, pxvid);
1673
1674         state1 = ext_v;
1675
1676         t = i915_mch_val(dev_priv);
1677
1678         /* Revel in the empirically derived constants */
1679
1680         /* Correction factor in 1/100000 units */
1681         if (t > 80)
1682                 corr = ((t * 2349) + 135940);
1683         else if (t >= 50)
1684                 corr = ((t * 964) + 29317);
1685         else /* < 50 */
1686                 corr = ((t * 301) + 1004);
1687
1688         corr = corr * ((150142 * state1) / 10000 - 78642);
1689         corr /= 100000;
1690         corr2 = (corr * dev_priv->corr);
1691
1692         state2 = (corr2 * state1) / 10000;
1693         state2 /= 100; /* convert to mW */
1694
1695         i915_update_gfx_val(dev_priv);
1696
1697         return dev_priv->gfx_power + state2;
1698 }
1699
1700 /* Global for IPS driver to get at the current i915 device */
1701 static struct drm_i915_private *i915_mch_dev;
1702 /*
1703  * Lock protecting IPS related data structures
1704  *   - i915_mch_dev
1705  *   - dev_priv->max_delay
1706  *   - dev_priv->min_delay
1707  *   - dev_priv->fmax
1708  *   - dev_priv->gpu_busy
1709  */
1710 static DEFINE_SPINLOCK(mchdev_lock);
1711
1712 /**
1713  * i915_read_mch_val - return value for IPS use
1714  *
1715  * Calculate and return a value for the IPS driver to use when deciding whether
1716  * we have thermal and power headroom to increase CPU or GPU power budget.
1717  */
1718 unsigned long i915_read_mch_val(void)
1719 {
1720         struct drm_i915_private *dev_priv;
1721         unsigned long chipset_val, graphics_val, ret = 0;
1722
1723         spin_lock(&mchdev_lock);
1724         if (!i915_mch_dev)
1725                 goto out_unlock;
1726         dev_priv = i915_mch_dev;
1727
1728         chipset_val = i915_chipset_val(dev_priv);
1729         graphics_val = i915_gfx_val(dev_priv);
1730
1731         ret = chipset_val + graphics_val;
1732
1733 out_unlock:
1734         spin_unlock(&mchdev_lock);
1735
1736         return ret;
1737 }
1738 EXPORT_SYMBOL_GPL(i915_read_mch_val);
1739
1740 /**
1741  * i915_gpu_raise - raise GPU frequency limit
1742  *
1743  * Raise the limit; IPS indicates we have thermal headroom.
1744  */
1745 bool i915_gpu_raise(void)
1746 {
1747         struct drm_i915_private *dev_priv;
1748         bool ret = true;
1749
1750         spin_lock(&mchdev_lock);
1751         if (!i915_mch_dev) {
1752                 ret = false;
1753                 goto out_unlock;
1754         }
1755         dev_priv = i915_mch_dev;
1756
1757         if (dev_priv->max_delay > dev_priv->fmax)
1758                 dev_priv->max_delay--;
1759
1760 out_unlock:
1761         spin_unlock(&mchdev_lock);
1762
1763         return ret;
1764 }
1765 EXPORT_SYMBOL_GPL(i915_gpu_raise);
1766
1767 /**
1768  * i915_gpu_lower - lower GPU frequency limit
1769  *
1770  * IPS indicates we're close to a thermal limit, so throttle back the GPU
1771  * frequency maximum.
1772  */
1773 bool i915_gpu_lower(void)
1774 {
1775         struct drm_i915_private *dev_priv;
1776         bool ret = true;
1777
1778         spin_lock(&mchdev_lock);
1779         if (!i915_mch_dev) {
1780                 ret = false;
1781                 goto out_unlock;
1782         }
1783         dev_priv = i915_mch_dev;
1784
1785         if (dev_priv->max_delay < dev_priv->min_delay)
1786                 dev_priv->max_delay++;
1787
1788 out_unlock:
1789         spin_unlock(&mchdev_lock);
1790
1791         return ret;
1792 }
1793 EXPORT_SYMBOL_GPL(i915_gpu_lower);
1794
1795 /**
1796  * i915_gpu_busy - indicate GPU business to IPS
1797  *
1798  * Tell the IPS driver whether or not the GPU is busy.
1799  */
1800 bool i915_gpu_busy(void)
1801 {
1802         struct drm_i915_private *dev_priv;
1803         bool ret = false;
1804
1805         spin_lock(&mchdev_lock);
1806         if (!i915_mch_dev)
1807                 goto out_unlock;
1808         dev_priv = i915_mch_dev;
1809
1810         ret = dev_priv->busy;
1811
1812 out_unlock:
1813         spin_unlock(&mchdev_lock);
1814
1815         return ret;
1816 }
1817 EXPORT_SYMBOL_GPL(i915_gpu_busy);
1818
1819 /**
1820  * i915_gpu_turbo_disable - disable graphics turbo
1821  *
1822  * Disable graphics turbo by resetting the max frequency and setting the
1823  * current frequency to the default.
1824  */
1825 bool i915_gpu_turbo_disable(void)
1826 {
1827         struct drm_i915_private *dev_priv;
1828         bool ret = true;
1829
1830         spin_lock(&mchdev_lock);
1831         if (!i915_mch_dev) {
1832                 ret = false;
1833                 goto out_unlock;
1834         }
1835         dev_priv = i915_mch_dev;
1836
1837         dev_priv->max_delay = dev_priv->fstart;
1838
1839         if (!ironlake_set_drps(dev_priv->dev, dev_priv->fstart))
1840                 ret = false;
1841
1842 out_unlock:
1843         spin_unlock(&mchdev_lock);
1844
1845         return ret;
1846 }
1847 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
1848
1849 /**
1850  * Tells the intel_ips driver that the i915 driver is now loaded, if
1851  * IPS got loaded first.
1852  *
1853  * This awkward dance is so that neither module has to depend on the
1854  * other in order for IPS to do the appropriate communication of
1855  * GPU turbo limits to i915.
1856  */
1857 static void
1858 ips_ping_for_i915_load(void)
1859 {
1860         void (*link)(void);
1861
1862         link = symbol_get(ips_link_to_i915_driver);
1863         if (link) {
1864                 link();
1865                 symbol_put(ips_link_to_i915_driver);
1866         }
1867 }
1868
1869 /**
1870  * i915_driver_load - setup chip and create an initial config
1871  * @dev: DRM device
1872  * @flags: startup flags
1873  *
1874  * The driver load routine has to do several things:
1875  *   - drive output discovery via intel_modeset_init()
1876  *   - initialize the memory manager
1877  *   - allocate initial config memory
1878  *   - setup the DRM framebuffer with the allocated memory
1879  */
1880 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1881 {
1882         struct drm_i915_private *dev_priv;
1883         int ret = 0, mmio_bar;
1884         uint32_t agp_size;
1885
1886         /* i915 has 4 more counters */
1887         dev->counters += 4;
1888         dev->types[6] = _DRM_STAT_IRQ;
1889         dev->types[7] = _DRM_STAT_PRIMARY;
1890         dev->types[8] = _DRM_STAT_SECONDARY;
1891         dev->types[9] = _DRM_STAT_DMA;
1892
1893         dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1894         if (dev_priv == NULL)
1895                 return -ENOMEM;
1896
1897         dev->dev_private = (void *)dev_priv;
1898         dev_priv->dev = dev;
1899         dev_priv->info = (struct intel_device_info *) flags;
1900
1901         if (i915_get_bridge_dev(dev)) {
1902                 ret = -EIO;
1903                 goto free_priv;
1904         }
1905
1906         /* overlay on gen2 is broken and can't address above 1G */
1907         if (IS_GEN2(dev))
1908                 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
1909
1910         /* 965GM sometimes incorrectly writes to hardware status page (HWS)
1911          * using 32bit addressing, overwriting memory if HWS is located
1912          * above 4GB.
1913          *
1914          * The documentation also mentions an issue with undefined
1915          * behaviour if any general state is accessed within a page above 4GB,
1916          * which also needs to be handled carefully.
1917          */
1918         if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1919                 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32));
1920
1921         mmio_bar = IS_GEN2(dev) ? 1 : 0;
1922         dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, 0);
1923         if (!dev_priv->regs) {
1924                 DRM_ERROR("failed to map registers\n");
1925                 ret = -EIO;
1926                 goto put_bridge;
1927         }
1928
1929         dev_priv->mm.gtt = intel_gtt_get();
1930         if (!dev_priv->mm.gtt) {
1931                 DRM_ERROR("Failed to initialize GTT\n");
1932                 ret = -ENODEV;
1933                 goto out_iomapfree;
1934         }
1935
1936         agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1937
1938         dev_priv->mm.gtt_mapping =
1939                 io_mapping_create_wc(dev->agp->base, agp_size);
1940         if (dev_priv->mm.gtt_mapping == NULL) {
1941                 ret = -EIO;
1942                 goto out_rmmap;
1943         }
1944
1945         /* Set up a WC MTRR for non-PAT systems.  This is more common than
1946          * one would think, because the kernel disables PAT on first
1947          * generation Core chips because WC PAT gets overridden by a UC
1948          * MTRR if present.  Even if a UC MTRR isn't present.
1949          */
1950         dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1951                                          agp_size,
1952                                          MTRR_TYPE_WRCOMB, 1);
1953         if (dev_priv->mm.gtt_mtrr < 0) {
1954                 DRM_INFO("MTRR allocation failed.  Graphics "
1955                          "performance may suffer.\n");
1956         }
1957
1958         /* The i915 workqueue is primarily used for batched retirement of
1959          * requests (and thus managing bo) once the task has been completed
1960          * by the GPU. i915_gem_retire_requests() is called directly when we
1961          * need high-priority retirement, such as waiting for an explicit
1962          * bo.
1963          *
1964          * It is also used for periodic low-priority events, such as
1965          * idle-timers and recording error state.
1966          *
1967          * All tasks on the workqueue are expected to acquire the dev mutex
1968          * so there is no point in running more than one instance of the
1969          * workqueue at any time: max_active = 1 and NON_REENTRANT.
1970          */
1971         dev_priv->wq = alloc_workqueue("i915",
1972                                        WQ_UNBOUND | WQ_NON_REENTRANT,
1973                                        1);
1974         if (dev_priv->wq == NULL) {
1975                 DRM_ERROR("Failed to create our workqueue.\n");
1976                 ret = -ENOMEM;
1977                 goto out_iomapfree;
1978         }
1979
1980         /* enable GEM by default */
1981         dev_priv->has_gem = 1;
1982
1983         dev->driver->get_vblank_counter = i915_get_vblank_counter;
1984         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
1985         if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev)) {
1986                 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
1987                 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
1988         }
1989
1990         /* Try to make sure MCHBAR is enabled before poking at it */
1991         intel_setup_mchbar(dev);
1992         intel_setup_gmbus(dev);
1993         intel_opregion_setup(dev);
1994
1995         /* Make sure the bios did its job and set up vital registers */
1996         intel_setup_bios(dev);
1997
1998         i915_gem_load(dev);
1999
2000         /* Init HWS */
2001         if (!I915_NEED_GFX_HWS(dev)) {
2002                 ret = i915_init_phys_hws(dev);
2003                 if (ret)
2004                         goto out_gem_unload;
2005         }
2006
2007         if (IS_PINEVIEW(dev))
2008                 i915_pineview_get_mem_freq(dev);
2009         else if (IS_GEN5(dev))
2010                 i915_ironlake_get_mem_freq(dev);
2011
2012         /* On the 945G/GM, the chipset reports the MSI capability on the
2013          * integrated graphics even though the support isn't actually there
2014          * according to the published specs.  It doesn't appear to function
2015          * correctly in testing on 945G.
2016          * This may be a side effect of MSI having been made available for PEG
2017          * and the registers being closely associated.
2018          *
2019          * According to chipset errata, on the 965GM, MSI interrupts may
2020          * be lost or delayed, but we use them anyways to avoid
2021          * stuck interrupts on some machines.
2022          */
2023         if (!IS_I945G(dev) && !IS_I945GM(dev))
2024                 pci_enable_msi(dev->pdev);
2025
2026         spin_lock_init(&dev_priv->irq_lock);
2027         spin_lock_init(&dev_priv->error_lock);
2028
2029         if (IS_MOBILE(dev) || !IS_GEN2(dev))
2030                 dev_priv->num_pipe = 2;
2031         else
2032                 dev_priv->num_pipe = 1;
2033
2034         ret = drm_vblank_init(dev, dev_priv->num_pipe);
2035         if (ret)
2036                 goto out_gem_unload;
2037
2038         /* Start out suspended */
2039         dev_priv->mm.suspended = 1;
2040
2041         intel_detect_pch(dev);
2042
2043         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2044                 ret = i915_load_modeset_init(dev);
2045                 if (ret < 0) {
2046                         DRM_ERROR("failed to init modeset\n");
2047                         goto out_gem_unload;
2048                 }
2049         }
2050
2051         /* Must be done after probing outputs */
2052         intel_opregion_init(dev);
2053         acpi_video_register();
2054
2055         setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
2056                     (unsigned long) dev);
2057
2058         spin_lock(&mchdev_lock);
2059         i915_mch_dev = dev_priv;
2060         dev_priv->mchdev_lock = &mchdev_lock;
2061         spin_unlock(&mchdev_lock);
2062
2063         ips_ping_for_i915_load();
2064
2065         return 0;
2066
2067 out_gem_unload:
2068         if (dev->pdev->msi_enabled)
2069                 pci_disable_msi(dev->pdev);
2070
2071         intel_teardown_gmbus(dev);
2072         intel_teardown_mchbar(dev);
2073         destroy_workqueue(dev_priv->wq);
2074 out_iomapfree:
2075         io_mapping_free(dev_priv->mm.gtt_mapping);
2076 out_rmmap:
2077         pci_iounmap(dev->pdev, dev_priv->regs);
2078 put_bridge:
2079         pci_dev_put(dev_priv->bridge_dev);
2080 free_priv:
2081         kfree(dev_priv);
2082         return ret;
2083 }
2084
2085 int i915_driver_unload(struct drm_device *dev)
2086 {
2087         struct drm_i915_private *dev_priv = dev->dev_private;
2088         int ret;
2089
2090         spin_lock(&mchdev_lock);
2091         i915_mch_dev = NULL;
2092         spin_unlock(&mchdev_lock);
2093
2094         if (dev_priv->mm.inactive_shrinker.shrink)
2095                 unregister_shrinker(&dev_priv->mm.inactive_shrinker);
2096
2097         mutex_lock(&dev->struct_mutex);
2098         ret = i915_gpu_idle(dev);
2099         if (ret)
2100                 DRM_ERROR("failed to idle hardware: %d\n", ret);
2101         mutex_unlock(&dev->struct_mutex);
2102
2103         /* Cancel the retire work handler, which should be idle now. */
2104         cancel_delayed_work_sync(&dev_priv->mm.retire_work);
2105
2106         io_mapping_free(dev_priv->mm.gtt_mapping);
2107         if (dev_priv->mm.gtt_mtrr >= 0) {
2108                 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2109                          dev->agp->agp_info.aper_size * 1024 * 1024);
2110                 dev_priv->mm.gtt_mtrr = -1;
2111         }
2112
2113         acpi_video_unregister();
2114
2115         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2116                 intel_fbdev_fini(dev);
2117                 intel_modeset_cleanup(dev);
2118
2119                 /*
2120                  * free the memory space allocated for the child device
2121                  * config parsed from VBT
2122                  */
2123                 if (dev_priv->child_dev && dev_priv->child_dev_num) {
2124                         kfree(dev_priv->child_dev);
2125                         dev_priv->child_dev = NULL;
2126                         dev_priv->child_dev_num = 0;
2127                 }
2128
2129                 vga_switcheroo_unregister_client(dev->pdev);
2130                 vga_client_register(dev->pdev, NULL, NULL, NULL);
2131         }
2132
2133         /* Free error state after interrupts are fully disabled. */
2134         del_timer_sync(&dev_priv->hangcheck_timer);
2135         cancel_work_sync(&dev_priv->error_work);
2136         i915_destroy_error_state(dev);
2137
2138         if (dev->pdev->msi_enabled)
2139                 pci_disable_msi(dev->pdev);
2140
2141         intel_opregion_fini(dev);
2142
2143         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2144                 /* Flush any outstanding unpin_work. */
2145                 flush_workqueue(dev_priv->wq);
2146
2147                 i915_gem_free_all_phys_object(dev);
2148
2149                 mutex_lock(&dev->struct_mutex);
2150                 i915_gem_cleanup_ringbuffer(dev);
2151                 mutex_unlock(&dev->struct_mutex);
2152                 if (I915_HAS_FBC(dev) && i915_powersave)
2153                         i915_cleanup_compression(dev);
2154                 drm_mm_takedown(&dev_priv->mm.stolen);
2155
2156                 intel_cleanup_overlay(dev);
2157
2158                 if (!I915_NEED_GFX_HWS(dev))
2159                         i915_free_hws(dev);
2160         }
2161
2162         if (dev_priv->regs != NULL)
2163                 pci_iounmap(dev->pdev, dev_priv->regs);
2164
2165         intel_teardown_gmbus(dev);
2166         intel_teardown_mchbar(dev);
2167
2168         destroy_workqueue(dev_priv->wq);
2169
2170         pci_dev_put(dev_priv->bridge_dev);
2171         kfree(dev->dev_private);
2172
2173         return 0;
2174 }
2175
2176 int i915_driver_open(struct drm_device *dev, struct drm_file *file)
2177 {
2178         struct drm_i915_file_private *file_priv;
2179
2180         DRM_DEBUG_DRIVER("\n");
2181         file_priv = kmalloc(sizeof(*file_priv), GFP_KERNEL);
2182         if (!file_priv)
2183                 return -ENOMEM;
2184
2185         file->driver_priv = file_priv;
2186
2187         spin_lock_init(&file_priv->mm.lock);
2188         INIT_LIST_HEAD(&file_priv->mm.request_list);
2189
2190         return 0;
2191 }
2192
2193 /**
2194  * i915_driver_lastclose - clean up after all DRM clients have exited
2195  * @dev: DRM device
2196  *
2197  * Take care of cleaning up after all DRM clients have exited.  In the
2198  * mode setting case, we want to restore the kernel's initial mode (just
2199  * in case the last client left us in a bad state).
2200  *
2201  * Additionally, in the non-mode setting case, we'll tear down the AGP
2202  * and DMA structures, since the kernel won't be using them, and clea
2203  * up any GEM state.
2204  */
2205 void i915_driver_lastclose(struct drm_device * dev)
2206 {
2207         drm_i915_private_t *dev_priv = dev->dev_private;
2208
2209         if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
2210                 drm_fb_helper_restore();
2211                 vga_switcheroo_process_delayed_switch();
2212                 return;
2213         }
2214
2215         i915_gem_lastclose(dev);
2216
2217         if (dev_priv->agp_heap)
2218                 i915_mem_takedown(&(dev_priv->agp_heap));
2219
2220         i915_dma_cleanup(dev);
2221 }
2222
2223 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
2224 {
2225         drm_i915_private_t *dev_priv = dev->dev_private;
2226         i915_gem_release(dev, file_priv);
2227         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2228                 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
2229 }
2230
2231 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
2232 {
2233         struct drm_i915_file_private *file_priv = file->driver_priv;
2234
2235         kfree(file_priv);
2236 }
2237
2238 struct drm_ioctl_desc i915_ioctls[] = {
2239         DRM_IOCTL_DEF_DRV(I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2240         DRM_IOCTL_DEF_DRV(I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
2241         DRM_IOCTL_DEF_DRV(I915_FLIP, i915_flip_bufs, DRM_AUTH),
2242         DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
2243         DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
2244         DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
2245         DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH),
2246         DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2247         DRM_IOCTL_DEF_DRV(I915_ALLOC, i915_mem_alloc, DRM_AUTH),
2248         DRM_IOCTL_DEF_DRV(I915_FREE, i915_mem_free, DRM_AUTH),
2249         DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2250         DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
2251         DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2252         DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2253         DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH),
2254         DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
2255         DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2256         DRM_IOCTL_DEF_DRV(I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2257         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
2258         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED),
2259         DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2260         DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2261         DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
2262         DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED),
2263         DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2264         DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2265         DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED),
2266         DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED),
2267         DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED),
2268         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED),
2269         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED),
2270         DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED),
2271         DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED),
2272         DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED),
2273         DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED),
2274         DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED),
2275         DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
2276         DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED),
2277         DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2278         DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2279 };
2280
2281 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
2282
2283 /**
2284  * Determine if the device really is AGP or not.
2285  *
2286  * All Intel graphics chipsets are treated as AGP, even if they are really
2287  * PCI-e.
2288  *
2289  * \param dev   The device to be tested.
2290  *
2291  * \returns
2292  * A value of 1 is always retured to indictate every i9x5 is AGP.
2293  */
2294 int i915_driver_device_is_agp(struct drm_device * dev)
2295 {
2296         return 1;
2297 }