sys/dev/drm/i915/i915_dma.c

   1 /* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
   2  */
   3 /*
   4  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  */
  28
  29 #include <drm/drmP.h>
  30 #include <drm/i915_drm.h>
  31 #include "i915_drv.h"
  32 #include "intel_drv.h"
  33 #include "intel_ringbuffer.h"
  34 #include <linux/workqueue.h>
  35
  36 extern struct drm_i915_private *i915_mch_dev;
  37
  38 #define LP_RING(d) (&((struct drm_i915_private *)(d))->ring[RCS])
  39
  40 #define BEGIN_LP_RING(n) \
  41         intel_ring_begin(LP_RING(dev_priv), (n))
  42
  43 #define OUT_RING(x) \
  44         intel_ring_emit(LP_RING(dev_priv), x)
  45
  46 #define ADVANCE_LP_RING() \
  47         __intel_ring_advance(LP_RING(dev_priv))
  48
  49 /**
  50  * Lock test for when it's just for synchronization of ring access.
  51  *
  52  * In that case, we don't need to do it when GEM is initialized as nobody else
  53  * has access to the ring.
  54  */
  55 #define RING_LOCK_TEST_WITH_RETURN(dev, file) do {                      \
  56         if (LP_RING(dev->dev_private)->buffer->obj == NULL)                     \
  57                 LOCK_TEST_WITH_RETURN(dev, file);                       \
  58 } while (0)
  59
  60 static inline u32
  61 intel_read_legacy_status_page(struct drm_i915_private *dev_priv, int reg)
  62 {
  63         if (I915_NEED_GFX_HWS(dev_priv->dev))
  64                 return ioread32(dev_priv->dri1.gfx_hws_cpu_addr + reg);
  65         else
  66                 return intel_read_status_page(LP_RING(dev_priv), reg);
  67 }
  68
  69 #define READ_HWSP(dev_priv, reg) intel_read_legacy_status_page(dev_priv, reg)
  70 #define READ_BREADCRUMB(dev_priv) READ_HWSP(dev_priv, I915_BREADCRUMB_INDEX)
  71 #define I915_BREADCRUMB_INDEX           0x21
  72
  73 void i915_update_dri1_breadcrumb(struct drm_device *dev)
  74 {
  75         /* XXX: We don't care about dri1 */
  76         return;
  77 }
  78
  79 static void i915_write_hws_pga(struct drm_device *dev)
  80 {
  81         struct drm_i915_private *dev_priv = dev->dev_private;
  82         u32 addr;
  83
  84         addr = dev_priv->status_page_dmah->busaddr;
  85         if (INTEL_INFO(dev)->gen >= 4)
  86                 addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0;
  87         I915_WRITE(HWS_PGA, addr);
  88 }
  89
  90 /**
  91  * Frees the hardware status page, whether it's a physical address or a virtual
  92  * address set up by the X Server.
  93  */
  94 static void i915_free_hws(struct drm_device *dev)
  95 {
  96         struct drm_i915_private *dev_priv = dev->dev_private;
  97         struct intel_engine_cs *ring = LP_RING(dev_priv);
  98
  99         if (dev_priv->status_page_dmah) {
 100                 drm_pci_free(dev, dev_priv->status_page_dmah);
 101                 dev_priv->status_page_dmah = NULL;
 102         }
 103
 104         if (ring->status_page.gfx_addr) {
 105                 ring->status_page.gfx_addr = 0;
 106 #if 0   /* We don't care about dri1 */
 107                 iounmap(dev_priv->dri1.gfx_hws_cpu_addr);
 108 #endif
 109         }
 110
 111         /* Need to rewrite hardware status page */
 112         I915_WRITE(HWS_PGA, 0x1ffff000);
 113 }
 114
 115 void i915_kernel_lost_context(struct drm_device * dev)
 116 {
 117         struct drm_i915_private *dev_priv = dev->dev_private;
 118         struct drm_i915_private *master_priv = dev_priv;
 119         struct intel_engine_cs *ring = LP_RING(dev_priv);
 120         struct intel_ringbuffer *ringbuf = ring->buffer;
 121
 122         /*
 123          * We should never lose context on the ring with modesetting
 124          * as we don't expose it to userspace
 125          */
 126         if (drm_core_check_feature(dev, DRIVER_MODESET))
 127                 return;
 128
 129         ringbuf->head = I915_READ_HEAD(ring) & HEAD_ADDR;
 130         ringbuf->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
 131         ringbuf->space = ringbuf->head - (ringbuf->tail + I915_RING_FREE_SPACE);
 132         if (ringbuf->space < 0)
 133                 ringbuf->space += ringbuf->size;
 134
 135 #if 0
 136         if (!dev->primary->master)
 137                 return;
 138
 139         master_priv = dev->primary->master->driver_priv;
 140 #endif
 141         if (ringbuf->head == ringbuf->tail && master_priv->sarea_priv)
 142                 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 143 }
 144
 145 static int i915_dma_cleanup(struct drm_device * dev)
 146 {
 147         struct drm_i915_private *dev_priv = dev->dev_private;
 148         int i;
 149
 150         /* Make sure interrupts are disabled here because the uninstall ioctl
 151          * may not have been called from userspace and after dev_private
 152          * is freed, it's too late.
 153          */
 154         if (dev->irq_enabled)
 155                 drm_irq_uninstall(dev);
 156
 157         mutex_lock(&dev->struct_mutex);
 158         for (i = 0; i < I915_NUM_RINGS; i++)
 159                 intel_cleanup_ring_buffer(&dev_priv->ring[i]);
 160         mutex_unlock(&dev->struct_mutex);
 161
 162         /* Clear the HWS virtual address at teardown */
 163         if (I915_NEED_GFX_HWS(dev))
 164                 i915_free_hws(dev);
 165
 166         return 0;
 167 }
 168
 169 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 170 {
 171         struct drm_i915_private *dev_priv = dev->dev_private;
 172         int ret;
 173
 174         dev_priv->sarea = drm_getsarea(dev);
 175         if (!dev_priv->sarea) {
 176                 DRM_ERROR("can not find sarea!\n");
 177                 i915_dma_cleanup(dev);
 178                 return -EINVAL;
 179         }
 180
 181         dev_priv->sarea_priv = (drm_i915_sarea_t *)
 182             ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);
 183
 184         if (init->ring_size != 0) {
 185                 if (LP_RING(dev_priv)->buffer->obj != NULL) {
 186                         i915_dma_cleanup(dev);
 187                         DRM_ERROR("Client tried to initialize ringbuffer in "
 188                                   "GEM mode\n");
 189                         return -EINVAL;
 190                 }
 191
 192                 ret = intel_render_ring_init_dri(dev,
 193                                                  init->ring_start,
 194                                                  init->ring_size);
 195                 if (ret) {
 196                         i915_dma_cleanup(dev);
 197                         return ret;
 198                 }
 199         }
 200
 201         dev_priv->dri1.cpp = init->cpp;
 202         dev_priv->dri1.back_offset = init->back_offset;
 203         dev_priv->dri1.front_offset = init->front_offset;
 204         dev_priv->dri1.current_page = 0;
 205         dev_priv->sarea_priv->pf_current_page = 0;
 206
 207
 208         /* Allow hardware batchbuffers unless told otherwise.
 209          */
 210         dev_priv->dri1.allow_batchbuffer = 1;
 211
 212         return 0;
 213 }
 214
 215 static int i915_dma_resume(struct drm_device * dev)
 216 {
 217         struct drm_i915_private *dev_priv = dev->dev_private;
 218         struct intel_engine_cs *ring = LP_RING(dev_priv);
 219
 220         DRM_DEBUG_DRIVER("%s\n", __func__);
 221
 222         if (ring->buffer->virtual_start == NULL) {
 223                 DRM_ERROR("can not ioremap virtual address for"
 224                           " ring buffer\n");
 225                 return -ENOMEM;
 226         }
 227
 228         /* Program Hardware Status Page */
 229         if (!ring->status_page.page_addr) {
 230                 DRM_ERROR("Can not find hardware status page\n");
 231                 return -EINVAL;
 232         }
 233         DRM_DEBUG_DRIVER("hw status page @ %p\n",
 234                                 ring->status_page.page_addr);
 235         if (ring->status_page.gfx_addr != 0)
 236                 intel_ring_setup_status_page(ring);
 237         else
 238                 i915_write_hws_pga(dev);
 239
 240         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 241
 242         return 0;
 243 }
 244
 245 static int i915_dma_init(struct drm_device *dev, void *data,
 246                          struct drm_file *file_priv)
 247 {
 248         drm_i915_init_t *init = data;
 249         int retcode = 0;
 250
 251         if (drm_core_check_feature(dev, DRIVER_MODESET))
 252                 return -ENODEV;
 253
 254         switch (init->func) {
 255         case I915_INIT_DMA:
 256                 retcode = i915_initialize(dev, init);
 257                 break;
 258         case I915_CLEANUP_DMA:
 259                 retcode = i915_dma_cleanup(dev);
 260                 break;
 261         case I915_RESUME_DMA:
 262                 retcode = i915_dma_resume(dev);
 263                 break;
 264         default:
 265                 retcode = -EINVAL;
 266                 break;
 267         }
 268
 269         return retcode;
 270 }
 271
 272 /* Implement basically the same security restrictions as hardware does
 273  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 274  *
 275  * Most of the calculations below involve calculating the size of a
 276  * particular instruction.  It's important to get the size right as
 277  * that tells us where the next instruction to check is.  Any illegal
 278  * instruction detected will be given a size of zero, which is a
 279  * signal to abort the rest of the buffer.
 280  */
 281 static int validate_cmd(int cmd)
 282 {
 283         switch (((cmd >> 29) & 0x7)) {
 284         case 0x0:
 285                 switch ((cmd >> 23) & 0x3f) {
 286                 case 0x0:
 287                         return 1;       /* MI_NOOP */
 288                 case 0x4:
 289                         return 1;       /* MI_FLUSH */
 290                 default:
 291                         return 0;       /* disallow everything else */
 292                 }
 293                 break;
 294         case 0x1:
 295                 return 0;       /* reserved */
 296         case 0x2:
 297                 return (cmd & 0xff) + 2;        /* 2d commands */
 298         case 0x3:
 299                 if (((cmd >> 24) & 0x1f) <= 0x18)
 300                         return 1;
 301
 302                 switch ((cmd >> 24) & 0x1f) {
 303                 case 0x1c:
 304                         return 1;
 305                 case 0x1d:
 306                         switch ((cmd >> 16) & 0xff) {
 307                         case 0x3:
 308                                 return (cmd & 0x1f) + 2;
 309                         case 0x4:
 310                                 return (cmd & 0xf) + 2;
 311                         default:
 312                                 return (cmd & 0xffff) + 2;
 313                         }
 314                 case 0x1e:
 315                         if (cmd & (1 << 23))
 316                                 return (cmd & 0xffff) + 1;
 317                         else
 318                                 return 1;
 319                 case 0x1f:
 320                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 321                                 return (cmd & 0x1ffff) + 2;
 322                         else if (cmd & (1 << 17))       /* indirect random */
 323                                 if ((cmd & 0xffff) == 0)
 324                                         return 0;       /* unknown length, too hard */
 325                                 else
 326                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 327                         else
 328                                 return 2;       /* indirect sequential */
 329                 default:
 330                         return 0;
 331                 }
 332         default:
 333                 return 0;
 334         }
 335
 336         return 0;
 337 }
 338
 339 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
 340 {
 341         struct drm_i915_private *dev_priv = dev->dev_private;
 342         int i, ret;
 343
 344         if ((dwords+1) * sizeof(int) >= LP_RING(dev_priv)->buffer->size - 8)
 345                 return -EINVAL;
 346
 347         for (i = 0; i < dwords;) {
 348                 int sz = validate_cmd(buffer[i]);
 349                 if (sz == 0 || i + sz > dwords)
 350                         return -EINVAL;
 351                 i += sz;
 352         }
 353
 354         ret = BEGIN_LP_RING((dwords+1)&~1);
 355         if (ret)
 356                 return ret;
 357
 358         for (i = 0; i < dwords; i++)
 359                 OUT_RING(buffer[i]);
 360         if (dwords & 1)
 361                 OUT_RING(0);
 362
 363         ADVANCE_LP_RING();
 364
 365         return 0;
 366 }
 367
 368 int
 369 i915_emit_box(struct drm_device *dev,
 370               struct drm_clip_rect *box,
 371               int DR1, int DR4)
 372 {
 373         struct drm_i915_private *dev_priv = dev->dev_private;
 374         int ret;
 375
 376         if (box->y2 <= box->y1 || box->x2 <= box->x1 ||
 377             box->y2 <= 0 || box->x2 <= 0) {
 378                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 379                           box->x1, box->y1, box->x2, box->y2);
 380                 return -EINVAL;
 381         }
 382
 383         if (INTEL_INFO(dev)->gen >= 4) {
 384                 ret = BEGIN_LP_RING(4);
 385                 if (ret)
 386                         return ret;
 387
 388                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 389                 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
 390                 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
 391                 OUT_RING(DR4);
 392         } else {
 393                 ret = BEGIN_LP_RING(6);
 394                 if (ret)
 395                         return ret;
 396
 397                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 398                 OUT_RING(DR1);
 399                 OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
 400                 OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
 401                 OUT_RING(DR4);
 402                 OUT_RING(0);
 403         }
 404         ADVANCE_LP_RING();
 405
 406         return 0;
 407 }
 408
 409 /* XXX: Emitting the counter should really be moved to part of the IRQ
 410  * emit. For now, do it in both places:
 411  */
 412
 413 static void i915_emit_breadcrumb(struct drm_device *dev)
 414 {
 415         struct drm_i915_private *dev_priv = dev->dev_private;
 416
 417         dev_priv->dri1.counter++;
 418         if (dev_priv->dri1.counter > 0x7FFFFFFFUL)
 419                 dev_priv->dri1.counter = 0;
 420         if (dev_priv->sarea_priv)
 421                 dev_priv->sarea_priv->last_enqueue = dev_priv->dri1.counter;
 422
 423         if (BEGIN_LP_RING(4) == 0) {
 424                 OUT_RING(MI_STORE_DWORD_INDEX);
 425                 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 426                 OUT_RING(dev_priv->dri1.counter);
 427                 OUT_RING(0);
 428                 ADVANCE_LP_RING();
 429         }
 430 }
 431
 432 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 433                                    drm_i915_cmdbuffer_t *cmd,
 434                                    struct drm_clip_rect *cliprects,
 435                                    void *cmdbuf)
 436 {
 437         int nbox = cmd->num_cliprects;
 438         int i = 0, count, ret;
 439
 440         if (cmd->sz & 0x3) {
 441                 DRM_ERROR("alignment");
 442                 return -EINVAL;
 443         }
 444
 445         i915_kernel_lost_context(dev);
 446
 447         count = nbox ? nbox : 1;
 448
 449         for (i = 0; i < count; i++) {
 450                 if (i < nbox) {
 451                         ret = i915_emit_box(dev, &cliprects[i],
 452                                             cmd->DR1, cmd->DR4);
 453                         if (ret)
 454                                 return ret;
 455                 }
 456
 457                 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
 458                 if (ret)
 459                         return ret;
 460         }
 461
 462         i915_emit_breadcrumb(dev);
 463         return 0;
 464 }
 465
 466 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 467                                      drm_i915_batchbuffer_t * batch,
 468                                      struct drm_clip_rect *cliprects)
 469 {
 470         struct drm_i915_private *dev_priv = dev->dev_private;
 471         int nbox = batch->num_cliprects;
 472         int i, count, ret;
 473
 474         if ((batch->start | batch->used) & 0x7) {
 475                 DRM_ERROR("alignment");
 476                 return -EINVAL;
 477         }
 478
 479         i915_kernel_lost_context(dev);
 480
 481         count = nbox ? nbox : 1;
 482         for (i = 0; i < count; i++) {
 483                 if (i < nbox) {
 484                         ret = i915_emit_box(dev, &cliprects[i],
 485                                             batch->DR1, batch->DR4);
 486                         if (ret)
 487                                 return ret;
 488                 }
 489
 490                 if (!IS_I830(dev) && !IS_845G(dev)) {
 491                         ret = BEGIN_LP_RING(2);
 492                         if (ret)
 493                                 return ret;
 494
 495                         if (INTEL_INFO(dev)->gen >= 4) {
 496                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 497                                 OUT_RING(batch->start);
 498                         } else {
 499                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 500                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 501                         }
 502                 } else {
 503                         ret = BEGIN_LP_RING(4);
 504                         if (ret)
 505                                 return ret;
 506
 507                         OUT_RING(MI_BATCH_BUFFER);
 508                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 509                         OUT_RING(batch->start + batch->used - 4);
 510                         OUT_RING(0);
 511                 }
 512                 ADVANCE_LP_RING();
 513         }
 514
 515
 516         if (IS_G4X(dev) || IS_GEN5(dev)) {
 517                 if (BEGIN_LP_RING(2) == 0) {
 518                         OUT_RING(MI_FLUSH | MI_NO_WRITE_FLUSH | MI_INVALIDATE_ISP);
 519                         OUT_RING(MI_NOOP);
 520                         ADVANCE_LP_RING();
 521                 }
 522         }
 523
 524         i915_emit_breadcrumb(dev);
 525         return 0;
 526 }
 527
 528 static int i915_dispatch_flip(struct drm_device * dev)
 529 {
 530         struct drm_i915_private *dev_priv = dev->dev_private;
 531         int ret;
 532
 533         if (!dev_priv->sarea_priv)
 534                 return -EINVAL;
 535
 536         DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
 537                           __func__,
 538                          dev_priv->dri1.current_page,
 539                          dev_priv->sarea_priv->pf_current_page);
 540
 541         i915_kernel_lost_context(dev);
 542
 543         ret = BEGIN_LP_RING(10);
 544         if (ret)
 545                 return ret;
 546
 547         OUT_RING(MI_FLUSH | MI_READ_FLUSH);
 548         OUT_RING(0);
 549
 550         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 551         OUT_RING(0);
 552         if (dev_priv->dri1.current_page == 0) {
 553                 OUT_RING(dev_priv->dri1.back_offset);
 554                 dev_priv->dri1.current_page = 1;
 555         } else {
 556                 OUT_RING(dev_priv->dri1.front_offset);
 557                 dev_priv->dri1.current_page = 0;
 558         }
 559         OUT_RING(0);
 560
 561         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 562         OUT_RING(0);
 563
 564         ADVANCE_LP_RING();
 565
 566         dev_priv->sarea_priv->last_enqueue = dev_priv->dri1.counter++;
 567
 568         if (BEGIN_LP_RING(4) == 0) {
 569                 OUT_RING(MI_STORE_DWORD_INDEX);
 570                 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 571                 OUT_RING(dev_priv->dri1.counter);
 572                 OUT_RING(0);
 573                 ADVANCE_LP_RING();
 574         }
 575
 576         dev_priv->sarea_priv->pf_current_page = dev_priv->dri1.current_page;
 577         return 0;
 578 }
 579
 580 static int i915_quiescent(struct drm_device *dev)
 581 {
 582         i915_kernel_lost_context(dev);
 583         return intel_ring_idle(LP_RING(dev->dev_private));
 584 }
 585
 586 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 587                             struct drm_file *file_priv)
 588 {
 589         int ret;
 590
 591         if (drm_core_check_feature(dev, DRIVER_MODESET))
 592                 return -ENODEV;
 593
 594         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 595
 596         mutex_lock(&dev->struct_mutex);
 597         ret = i915_quiescent(dev);
 598         mutex_unlock(&dev->struct_mutex);
 599
 600         return ret;
 601 }
 602
 603 static int i915_batchbuffer(struct drm_device *dev, void *data,
 604                             struct drm_file *file_priv)
 605 {
 606         struct drm_i915_private *dev_priv = dev->dev_private;
 607         drm_i915_sarea_t *sarea_priv;
 608         drm_i915_batchbuffer_t *batch = data;
 609         int ret;
 610         struct drm_clip_rect *cliprects = NULL;
 611
 612         if (drm_core_check_feature(dev, DRIVER_MODESET))
 613                 return -ENODEV;
 614
 615         sarea_priv = (drm_i915_sarea_t *) dev_priv->sarea_priv;
 616
 617         if (!dev_priv->dri1.allow_batchbuffer) {
 618                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 619                 return -EINVAL;
 620         }
 621
 622         DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
 623                         batch->start, batch->used, batch->num_cliprects);
 624
 625         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 626
 627         if (batch->num_cliprects < 0)
 628                 return -EINVAL;
 629
 630         if (batch->num_cliprects) {
 631                 cliprects = kcalloc(batch->num_cliprects,
 632                                     sizeof(*cliprects),
 633                                     GFP_KERNEL);
 634                 if (cliprects == NULL)
 635                         return -ENOMEM;
 636
 637                 ret = copy_from_user(cliprects, batch->cliprects,
 638                                      batch->num_cliprects *
 639                                      sizeof(struct drm_clip_rect));
 640                 if (ret != 0) {
 641                         ret = -EFAULT;
 642                         goto fail_free;
 643                 }
 644         }
 645
 646         mutex_lock(&dev->struct_mutex);
 647         ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
 648         mutex_unlock(&dev->struct_mutex);
 649
 650         if (sarea_priv)
 651                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 652
 653 fail_free:
 654         kfree(cliprects);
 655
 656         return ret;
 657 }
 658
 659 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 660                           struct drm_file *file_priv)
 661 {
 662         struct drm_i915_private *dev_priv = dev->dev_private;
 663         drm_i915_sarea_t *sarea_priv;
 664         drm_i915_cmdbuffer_t *cmdbuf = data;
 665         struct drm_clip_rect *cliprects = NULL;
 666         void *batch_data;
 667         int ret;
 668
 669         DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 670                         cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 671
 672         if (drm_core_check_feature(dev, DRIVER_MODESET))
 673                 return -ENODEV;
 674
 675         sarea_priv = (drm_i915_sarea_t *) dev_priv->sarea_priv;
 676
 677         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 678
 679         if (cmdbuf->num_cliprects < 0)
 680                 return -EINVAL;
 681
 682         batch_data = kmalloc(cmdbuf->sz, M_DRM, M_WAITOK);
 683         if (batch_data == NULL)
 684                 return -ENOMEM;
 685
 686         ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
 687         if (ret != 0) {
 688                 ret = -EFAULT;
 689                 goto fail_batch_free;
 690         }
 691
 692         if (cmdbuf->num_cliprects) {
 693                 cliprects = kcalloc(cmdbuf->num_cliprects,
 694                                     sizeof(*cliprects), GFP_KERNEL);
 695                 if (cliprects == NULL) {
 696                         ret = -ENOMEM;
 697                         goto fail_batch_free;
 698                 }
 699
 700                 ret = copy_from_user(cliprects, cmdbuf->cliprects,
 701                                      cmdbuf->num_cliprects *
 702                                      sizeof(struct drm_clip_rect));
 703                 if (ret != 0) {
 704                         ret = -EFAULT;
 705                         goto fail_clip_free;
 706                 }
 707         }
 708
 709         mutex_lock(&dev->struct_mutex);
 710         ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
 711         mutex_unlock(&dev->struct_mutex);
 712         if (ret) {
 713                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 714                 goto fail_clip_free;
 715         }
 716
 717         if (sarea_priv)
 718                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 719
 720 fail_clip_free:
 721         kfree(cliprects);
 722 fail_batch_free:
 723         kfree(batch_data);
 724
 725         return ret;
 726 }
 727
 728 static int i915_emit_irq(struct drm_device * dev)
 729 {
 730         struct drm_i915_private *dev_priv = dev->dev_private;
 731 #if 0
 732         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 733 #endif
 734
 735         i915_kernel_lost_context(dev);
 736
 737         DRM_DEBUG_DRIVER("\n");
 738
 739         dev_priv->dri1.counter++;
 740         if (dev_priv->dri1.counter > 0x7FFFFFFFUL)
 741                 dev_priv->dri1.counter = 1;
 742         if (dev_priv->sarea_priv)
 743                 dev_priv->sarea_priv->last_enqueue = dev_priv->dri1.counter;
 744
 745         if (BEGIN_LP_RING(4) == 0) {
 746                 OUT_RING(MI_STORE_DWORD_INDEX);
 747                 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 748                 OUT_RING(dev_priv->dri1.counter);
 749                 OUT_RING(MI_USER_INTERRUPT);
 750                 ADVANCE_LP_RING();
 751         }
 752
 753         return dev_priv->dri1.counter;
 754 }
 755
 756 static int i915_wait_irq(struct drm_device * dev, int irq_nr)
 757 {
 758         struct drm_i915_private *dev_priv = dev->dev_private;
 759 #if 0
 760         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 761 #endif
 762         int ret = 0;
 763         struct intel_engine_cs *ring = LP_RING(dev_priv);
 764
 765         DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr,
 766                   READ_BREADCRUMB(dev_priv));
 767
 768 #if 0
 769         if (READ_BREADCRUMB(dev_priv) >= irq_nr) {
 770                 if (master_priv->sarea_priv)
 771                         master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 772                 return 0;
 773         }
 774
 775         if (master_priv->sarea_priv)
 776                 master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
 777 #else
 778         if (READ_BREADCRUMB(dev_priv) >= irq_nr) {
 779                 if (dev_priv->sarea_priv) {
 780                         dev_priv->sarea_priv->last_dispatch =
 781                                 READ_BREADCRUMB(dev_priv);
 782                 }
 783                 return 0;
 784         }
 785
 786         if (dev_priv->sarea_priv)
 787                 dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
 788 #endif
 789
 790         if (ring->irq_get(ring)) {
 791                 DRM_WAIT_ON(ret, ring->irq_queue, 3 * HZ,
 792                             READ_BREADCRUMB(dev_priv) >= irq_nr);
 793                 ring->irq_put(ring);
 794         } else if (wait_for(READ_BREADCRUMB(dev_priv) >= irq_nr, 3000))
 795                 ret = -EBUSY;
 796
 797         if (ret == -EBUSY) {
 798                 DRM_ERROR("EBUSY -- rec: %d emitted: %d\n",
 799                           READ_BREADCRUMB(dev_priv), (int)dev_priv->dri1.counter);
 800         }
 801
 802         return ret;
 803 }
 804
 805 /* Needs the lock as it touches the ring.
 806  */
 807 static int i915_irq_emit(struct drm_device *dev, void *data,
 808                          struct drm_file *file_priv)
 809 {
 810         struct drm_i915_private *dev_priv = dev->dev_private;
 811         drm_i915_irq_emit_t *emit = data;
 812         int result;
 813
 814         if (drm_core_check_feature(dev, DRIVER_MODESET))
 815                 return -ENODEV;
 816
 817         if (!dev_priv || !LP_RING(dev_priv)->buffer->virtual_start) {
 818                 DRM_ERROR("called with no initialization\n");
 819                 return -EINVAL;
 820         }
 821
 822         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 823
 824         mutex_lock(&dev->struct_mutex);
 825         result = i915_emit_irq(dev);
 826         mutex_unlock(&dev->struct_mutex);
 827
 828         if (copy_to_user(emit->irq_seq, &result, sizeof(int))) {
 829                 DRM_ERROR("copy_to_user\n");
 830                 return -EFAULT;
 831         }
 832
 833         return 0;
 834 }
 835
 836 /* Doesn't need the hardware lock.
 837  */
 838 static int i915_irq_wait(struct drm_device *dev, void *data,
 839                          struct drm_file *file_priv)
 840 {
 841         struct drm_i915_private *dev_priv = dev->dev_private;
 842         drm_i915_irq_wait_t *irqwait = data;
 843
 844         if (drm_core_check_feature(dev, DRIVER_MODESET))
 845                 return -ENODEV;
 846
 847         if (!dev_priv) {
 848                 DRM_ERROR("called with no initialization\n");
 849                 return -EINVAL;
 850         }
 851
 852         return i915_wait_irq(dev, irqwait->irq_seq);
 853 }
 854
 855 static int i915_vblank_pipe_get(struct drm_device *dev, void *data,
 856                          struct drm_file *file_priv)
 857 {
 858         struct drm_i915_private *dev_priv = dev->dev_private;
 859         drm_i915_vblank_pipe_t *pipe = data;
 860
 861         if (drm_core_check_feature(dev, DRIVER_MODESET))
 862                 return -ENODEV;
 863
 864         if (!dev_priv) {
 865                 DRM_ERROR("called with no initialization\n");
 866                 return -EINVAL;
 867         }
 868
 869         pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
 870
 871         return 0;
 872 }
 873
 874 /**
 875  * Schedule buffer swap at given vertical blank.
 876  */
 877 static int i915_vblank_swap(struct drm_device *dev, void *data,
 878                      struct drm_file *file_priv)
 879 {
 880         /* The delayed swap mechanism was fundamentally racy, and has been
 881          * removed.  The model was that the client requested a delayed flip/swap
 882          * from the kernel, then waited for vblank before continuing to perform
 883          * rendering.  The problem was that the kernel might wake the client
 884          * up before it dispatched the vblank swap (since the lock has to be
 885          * held while touching the ringbuffer), in which case the client would
 886          * clear and start the next frame before the swap occurred, and
 887          * flicker would occur in addition to likely missing the vblank.
 888          *
 889          * In the absence of this ioctl, userland falls back to a correct path
 890          * of waiting for a vblank, then dispatching the swap on its own.
 891          * Context switching to userland and back is plenty fast enough for
 892          * meeting the requirements of vblank swapping.
 893          */
 894         return -EINVAL;
 895 }
 896
 897 static int i915_flip_bufs(struct drm_device *dev, void *data,
 898                           struct drm_file *file_priv)
 899 {
 900         int ret;
 901
 902         if (drm_core_check_feature(dev, DRIVER_MODESET))
 903                 return -ENODEV;
 904
 905         DRM_DEBUG_DRIVER("%s\n", __func__);
 906
 907         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 908
 909         mutex_lock(&dev->struct_mutex);
 910         ret = i915_dispatch_flip(dev);
 911         mutex_unlock(&dev->struct_mutex);
 912
 913         return ret;
 914 }
 915
 916 static int i915_getparam(struct drm_device *dev, void *data,
 917                          struct drm_file *file_priv)
 918 {
 919         struct drm_i915_private *dev_priv = dev->dev_private;
 920         drm_i915_getparam_t *param = data;
 921         int value;
 922
 923         if (!dev_priv) {
 924                 DRM_ERROR("called with no initialization\n");
 925                 return -EINVAL;
 926         }
 927
 928         switch (param->param) {
 929         case I915_PARAM_IRQ_ACTIVE:
 930                 value = dev->irq_enabled ? 1 : 0;
 931                 break;
 932         case I915_PARAM_ALLOW_BATCHBUFFER:
 933                 value = dev_priv->dri1.allow_batchbuffer ? 1 : 0;
 934                 break;
 935         case I915_PARAM_LAST_DISPATCH:
 936                 value = READ_BREADCRUMB(dev_priv);
 937                 break;
 938         case I915_PARAM_CHIPSET_ID:
 939                 value = dev->pdev->device;
 940                 break;
 941         case I915_PARAM_HAS_GEM:
 942                 value = 1;
 943                 break;
 944         case I915_PARAM_NUM_FENCES_AVAIL:
 945                 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
 946                 break;
 947         case I915_PARAM_HAS_OVERLAY:
 948                 value = dev_priv->overlay ? 1 : 0;
 949                 break;
 950         case I915_PARAM_HAS_PAGEFLIPPING:
 951                 value = 1;
 952                 break;
 953         case I915_PARAM_HAS_EXECBUF2:
 954                 /* depends on GEM */
 955                 value = 1;
 956                 break;
 957         case I915_PARAM_HAS_BSD:
 958                 value = intel_ring_initialized(&dev_priv->ring[VCS]);
 959                 break;
 960         case I915_PARAM_HAS_BLT:
 961                 value = intel_ring_initialized(&dev_priv->ring[BCS]);
 962                 break;
 963         case I915_PARAM_HAS_VEBOX:
 964                 value = intel_ring_initialized(&dev_priv->ring[VECS]);
 965                 break;
 966         case I915_PARAM_HAS_RELAXED_FENCING:
 967                 value = 1;
 968                 break;
 969         case I915_PARAM_HAS_COHERENT_RINGS:
 970                 value = 1;
 971                 break;
 972         case I915_PARAM_HAS_EXEC_CONSTANTS:
 973                 value = INTEL_INFO(dev)->gen >= 4;
 974                 break;
 975         case I915_PARAM_HAS_RELAXED_DELTA:
 976                 value = 1;
 977                 break;
 978         case I915_PARAM_HAS_GEN7_SOL_RESET:
 979                 value = 1;
 980                 break;
 981         case I915_PARAM_HAS_LLC:
 982                 value = HAS_LLC(dev);
 983                 break;
 984         case I915_PARAM_HAS_WT:
 985                 value = HAS_WT(dev);
 986                 break;
 987         case I915_PARAM_HAS_ALIASING_PPGTT:
 988                 value = dev_priv->mm.aliasing_ppgtt || USES_FULL_PPGTT(dev);
 989                 break;
 990         case I915_PARAM_HAS_WAIT_TIMEOUT:
 991                 value = 1;
 992                 break;
 993         case I915_PARAM_HAS_SEMAPHORES:
 994                 value = i915_semaphore_is_enabled(dev);
 995                 break;
 996         case I915_PARAM_HAS_PINNED_BATCHES:
 997                 value = 1;
 998                 break;
 999         case I915_PARAM_HAS_EXEC_NO_RELOC:
1000                 value = 1;
1001                 break;
1002         case I915_PARAM_HAS_EXEC_HANDLE_LUT:
1003                 value = 1;
1004                 break;
1005         case I915_PARAM_CMD_PARSER_VERSION:
1006                 value = i915_cmd_parser_get_version();
1007                 break;
1008         default:
1009                 DRM_DEBUG("Unknown parameter %d\n", param->param);
1010                 return -EINVAL;
1011         }
1012
1013         if (copy_to_user(param->value, &value, sizeof(int))) {
1014                 DRM_ERROR("copy_to_user failed\n");
1015                 return -EFAULT;
1016         }
1017
1018         return 0;
1019 }
1020
1021 static int i915_setparam(struct drm_device *dev, void *data,
1022                          struct drm_file *file_priv)
1023 {
1024         struct drm_i915_private *dev_priv = dev->dev_private;
1025         drm_i915_setparam_t *param = data;
1026
1027         if (!dev_priv) {
1028                 DRM_ERROR("called with no initialization\n");
1029                 return -EINVAL;
1030         }
1031
1032         switch (param->param) {
1033         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
1034                 break;
1035         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
1036                 break;
1037         case I915_SETPARAM_ALLOW_BATCHBUFFER:
1038                 dev_priv->dri1.allow_batchbuffer = param->value ? 1 : 0;
1039                 break;
1040         case I915_SETPARAM_NUM_USED_FENCES:
1041                 if (param->value > dev_priv->num_fence_regs ||
1042                     param->value < 0)
1043                         return -EINVAL;
1044                 /* Userspace can use first N regs */
1045                 dev_priv->fence_reg_start = param->value;
1046                 break;
1047         default:
1048                 DRM_DEBUG_DRIVER("unknown parameter %d\n",
1049                                         param->param);
1050                 return -EINVAL;
1051         }
1052
1053         return 0;
1054 }
1055
1056 static int i915_set_status_page(struct drm_device *dev, void *data,
1057                                 struct drm_file *file_priv)
1058 {
1059 #if 0   /* We don't care about dri1 */
1060         struct drm_i915_private *dev_priv = dev->dev_private;
1061         drm_i915_hws_addr_t *hws = data;
1062         struct intel_engine_cs *ring;
1063
1064         if (drm_core_check_feature(dev, DRIVER_MODESET))
1065                 return -ENODEV;
1066
1067         if (!I915_NEED_GFX_HWS(dev))
1068                 return -EINVAL;
1069
1070         if (!dev_priv) {
1071                 DRM_ERROR("called with no initialization\n");
1072                 return -EINVAL;
1073         }
1074
1075         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1076                 WARN(1, "tried to set status page when mode setting active\n");
1077                 return 0;
1078         }
1079
1080         DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
1081
1082         ring = LP_RING(dev_priv);
1083         ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12);
1084
1085         dev_priv->dri1.gfx_hws_cpu_addr =
1086                 ioremap_wc(dev_priv->gtt.mappable_base + hws->addr, 4096);
1087         if (dev_priv->dri1.gfx_hws_cpu_addr == NULL) {
1088                 i915_dma_cleanup(dev);
1089                 ring->status_page.gfx_addr = 0;
1090                 DRM_ERROR("can not ioremap virtual address for"
1091                                 " G33 hw status page\n");
1092                 return -ENOMEM;
1093         }
1094
1095         memset_io(dev_priv->dri1.gfx_hws_cpu_addr, 0, PAGE_SIZE);
1096         I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
1097
1098         DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
1099                          ring->status_page.gfx_addr);
1100         DRM_DEBUG_DRIVER("load hws at %p\n",
1101                          ring->status_page.page_addr);
1102         return 0;
1103 #endif
1104         return -EINVAL;
1105 }
1106
1107 static int i915_get_bridge_dev(struct drm_device *dev)
1108 {
1109         struct drm_i915_private *dev_priv = dev->dev_private;
1110         static struct pci_dev i915_bridge_dev;
1111
1112         i915_bridge_dev.dev = pci_find_dbsf(0, 0, 0, 0);
1113         if (!i915_bridge_dev.dev) {
1114                 DRM_ERROR("bridge device not found\n");
1115                 return -1;
1116         }
1117
1118         dev_priv->bridge_dev = &i915_bridge_dev;
1119         return 0;
1120 }
1121
1122 #define MCHBAR_I915 0x44
1123 #define MCHBAR_I965 0x48
1124 #define MCHBAR_SIZE (4*4096)
1125
1126 #define DEVEN_REG 0x54
1127 #define   DEVEN_MCHBAR_EN (1 << 28)
1128
1129 /* Allocate space for the MCH regs if needed, return nonzero on error */
1130 static int
1131 intel_alloc_mchbar_resource(struct drm_device *dev)
1132 {
1133         struct drm_i915_private *dev_priv = dev->dev_private;
1134         int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
1135         device_t vga;
1136         u32 temp_lo, temp_hi = 0;
1137         u64 mchbar_addr;
1138
1139         if (INTEL_INFO(dev)->gen >= 4)
1140                 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
1141         pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
1142         mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
1143
1144         /* If ACPI doesn't have it, assume we need to allocate it ourselves */
1145 #ifdef CONFIG_PNP
1146         if (mchbar_addr &&
1147             pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
1148                 return 0;
1149 #endif
1150
1151         /* Get some space for it */
1152         vga = device_get_parent(dev->dev);
1153         dev_priv->mch_res_rid = 0x100;
1154         dev_priv->mch_res = BUS_ALLOC_RESOURCE(device_get_parent(vga),
1155             dev->dev, SYS_RES_MEMORY, &dev_priv->mch_res_rid, 0, ~0UL,
1156             MCHBAR_SIZE, RF_ACTIVE | RF_SHAREABLE, -1);
1157         if (dev_priv->mch_res == NULL) {
1158                 DRM_ERROR("failed mchbar resource alloc\n");
1159                 return (-ENOMEM);
1160         }
1161
1162         if (INTEL_INFO(dev)->gen >= 4)
1163                 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
1164                                        upper_32_bits(rman_get_start(dev_priv->mch_res)));
1165
1166         pci_write_config_dword(dev_priv->bridge_dev, reg,
1167                                lower_32_bits(rman_get_start(dev_priv->mch_res)));
1168         return 0;
1169 }
1170
1171 /* Setup MCHBAR if possible, return true if we should disable it again */
1172 static void
1173 intel_setup_mchbar(struct drm_device *dev)
1174 {
1175         struct drm_i915_private *dev_priv = dev->dev_private;
1176         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
1177         u32 temp;
1178         bool enabled;
1179
1180         if (IS_VALLEYVIEW(dev))
1181                 return;
1182
1183         dev_priv->mchbar_need_disable = false;
1184
1185         if (IS_I915G(dev) || IS_I915GM(dev)) {
1186                 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
1187                 enabled = !!(temp & DEVEN_MCHBAR_EN);
1188         } else {
1189                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1190                 enabled = temp & 1;
1191         }
1192
1193         /* If it's already enabled, don't have to do anything */
1194         if (enabled)
1195                 return;
1196
1197         if (intel_alloc_mchbar_resource(dev))
1198                 return;
1199
1200         dev_priv->mchbar_need_disable = true;
1201
1202         /* Space is allocated or reserved, so enable it. */
1203         if (IS_I915G(dev) || IS_I915GM(dev)) {
1204                 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
1205                                        temp | DEVEN_MCHBAR_EN);
1206         } else {
1207                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1208                 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
1209         }
1210 }
1211
1212 static void
1213 intel_teardown_mchbar(struct drm_device *dev)
1214 {
1215         struct drm_i915_private *dev_priv = dev->dev_private;
1216         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
1217         device_t vga;
1218         u32 temp;
1219
1220         if (dev_priv->mchbar_need_disable) {
1221                 if (IS_I915G(dev) || IS_I915GM(dev)) {
1222                         pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
1223                         temp &= ~DEVEN_MCHBAR_EN;
1224                         pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
1225                 } else {
1226                         pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1227                         temp &= ~1;
1228                         pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
1229                 }
1230         }
1231
1232         if (dev_priv->mch_res != NULL) {
1233                 vga = device_get_parent(dev->dev);
1234                 BUS_DEACTIVATE_RESOURCE(device_get_parent(vga), dev->dev,
1235                     SYS_RES_MEMORY, dev_priv->mch_res_rid, dev_priv->mch_res);
1236                 BUS_RELEASE_RESOURCE(device_get_parent(vga), dev->dev,
1237                     SYS_RES_MEMORY, dev_priv->mch_res_rid, dev_priv->mch_res);
1238                 dev_priv->mch_res = NULL;
1239         }
1240 }
1241
1242 #if 0
1243 /* true = enable decode, false = disable decoder */
1244 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1245 {
1246         struct drm_device *dev = cookie;
1247
1248         intel_modeset_vga_set_state(dev, state);
1249         if (state)
1250                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1251                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1252         else
1253                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1254 }
1255
1256 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1257 {
1258         struct drm_device *dev = pci_get_drvdata(pdev);
1259         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
1260         if (state == VGA_SWITCHEROO_ON) {
1261                 pr_info("switched on\n");
1262                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1263                 /* i915 resume handler doesn't set to D0 */
1264                 pci_set_power_state(dev->pdev, PCI_D0);
1265                 i915_resume(dev);
1266                 dev->switch_power_state = DRM_SWITCH_POWER_ON;
1267         } else {
1268                 pr_err("switched off\n");
1269                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1270                 i915_suspend(dev, pmm);
1271                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
1272         }
1273 }
1274
1275 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
1276 {
1277         struct drm_device *dev = pci_get_drvdata(pdev);
1278
1279         /*
1280          * FIXME: open_count is protected by drm_global_mutex but that would lead to
1281          * locking inversion with the driver load path. And the access here is
1282          * completely racy anyway. So don't bother with locking for now.
1283          */
1284         return dev->open_count == 0;
1285 }
1286
1287 static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
1288         .set_gpu_state = i915_switcheroo_set_state,
1289         .reprobe = NULL,
1290         .can_switch = i915_switcheroo_can_switch,
1291 };
1292 #endif
1293
1294 static int i915_load_modeset_init(struct drm_device *dev)
1295 {
1296         struct drm_i915_private *dev_priv = dev->dev_private;
1297         int ret;
1298
1299         ret = intel_parse_bios(dev);
1300         if (ret)
1301                 DRM_INFO("failed to find VBIOS tables\n");
1302
1303 #if 0
1304         /* If we have > 1 VGA cards, then we need to arbitrate access
1305          * to the common VGA resources.
1306          *
1307          * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
1308          * then we do not take part in VGA arbitration and the
1309          * vga_client_register() fails with -ENODEV.
1310          */
1311         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1312         if (ret && ret != -ENODEV)
1313                 goto out;
1314
1315         intel_register_dsm_handler();
1316
1317         ret = vga_switcheroo_register_client(dev->pdev, &i915_switcheroo_ops, false);
1318         if (ret)
1319                 goto cleanup_vga_client;
1320
1321         /* Initialise stolen first so that we may reserve preallocated
1322          * objects for the BIOS to KMS transition.
1323          */
1324         ret = i915_gem_init_stolen(dev);
1325         if (ret)
1326                 goto cleanup_vga_switcheroo;
1327 #endif
1328
1329         intel_power_domains_init_hw(dev_priv);
1330
1331         ret = drm_irq_install(dev, dev->irq);
1332         if (ret)
1333                 goto cleanup_gem_stolen;
1334
1335         /* Important: The output setup functions called by modeset_init need
1336          * working irqs for e.g. gmbus and dp aux transfers. */
1337         intel_modeset_init(dev);
1338
1339         ret = i915_gem_init(dev);
1340         if (ret)
1341                 goto cleanup_irq;
1342
1343 #if 0
1344         INIT_WORK(&dev_priv->console_resume_work, intel_console_resume);
1345 #endif
1346
1347         intel_modeset_gem_init(dev);
1348
1349         /* Always safe in the mode setting case. */
1350         /* FIXME: do pre/post-mode set stuff in core KMS code */
1351         dev->vblank_disable_allowed = 1;
1352         if (INTEL_INFO(dev)->num_pipes == 0) {
1353                 return 0;
1354         }
1355
1356         ret = intel_fbdev_init(dev);
1357         if (ret)
1358                 goto cleanup_gem;
1359
1360         /* Only enable hotplug handling once the fbdev is fully set up. */
1361         intel_hpd_init(dev);
1362
1363         /*
1364          * Some ports require correctly set-up hpd registers for detection to
1365          * work properly (leading to ghost connected connector status), e.g. VGA
1366          * on gm45.  Hence we can only set up the initial fbdev config after hpd
1367          * irqs are fully enabled. Now we should scan for the initial config
1368          * only once hotplug handling is enabled, but due to screwed-up locking
1369          * around kms/fbdev init we can't protect the fdbev initial config
1370          * scanning against hotplug events. Hence do this first and ignore the
1371          * tiny window where we will loose hotplug notifactions.
1372          */
1373         intel_fbdev_initial_config(dev);
1374
1375         /* Only enable hotplug handling once the fbdev is fully set up. */
1376         dev_priv->enable_hotplug_processing = true;
1377
1378         drm_kms_helper_poll_init(dev);
1379
1380         return 0;
1381
1382 cleanup_gem:
1383         mutex_lock(&dev->struct_mutex);
1384         i915_gem_cleanup_ringbuffer(dev);
1385         i915_gem_context_fini(dev);
1386         mutex_unlock(&dev->struct_mutex);
1387         WARN_ON(dev_priv->mm.aliasing_ppgtt);
1388 cleanup_irq:
1389         drm_irq_uninstall(dev);
1390 cleanup_gem_stolen:
1391 #if 0
1392         i915_gem_cleanup_stolen(dev);
1393 cleanup_vga_switcheroo:
1394         vga_switcheroo_unregister_client(dev->pdev);
1395 cleanup_vga_client:
1396         vga_client_register(dev->pdev, NULL, NULL, NULL);
1397 out:
1398 #endif
1399         return ret;
1400 }
1401
1402 #if 0
1403 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1404 {
1405         struct drm_i915_master_private *master_priv;
1406
1407         master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1408         if (!master_priv)
1409                 return -ENOMEM;
1410
1411         master->driver_priv = master_priv;
1412         return 0;
1413 }
1414
1415 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1416 {
1417         struct drm_i915_master_private *master_priv = master->driver_priv;
1418
1419         if (!master_priv)
1420                 return;
1421
1422         kfree(master_priv);
1423
1424         master->driver_priv = NULL;
1425 }
1426 #endif
1427
1428 #if IS_ENABLED(CONFIG_FB)
1429 static void i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
1430 {
1431         struct apertures_struct *ap;
1432         struct pci_dev *pdev = dev_priv->dev->pdev;
1433         bool primary;
1434
1435         ap = alloc_apertures(1);
1436         if (!ap)
1437                 return;
1438
1439         ap->ranges[0].base = dev_priv->gtt.mappable_base;
1440         ap->ranges[0].size = dev_priv->gtt.mappable_end;
1441
1442         primary =
1443                 pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
1444
1445         remove_conflicting_framebuffers(ap, "inteldrmfb", primary);
1446
1447         kfree(ap);
1448 }
1449 #else
1450 static void i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
1451 {
1452 }
1453 #endif
1454
1455 #if !defined(CONFIG_VGA_CONSOLE)
1456 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
1457 {
1458         return 0;
1459 }
1460 #elif !defined(CONFIG_DUMMY_CONSOLE)
1461 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
1462 {
1463         return -ENODEV;
1464 }
1465 #else
1466 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
1467 {
1468         int ret = 0;
1469
1470         DRM_INFO("Replacing VGA console driver\n");
1471
1472         console_lock();
1473         if (con_is_bound(&vga_con))
1474                 ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
1475         if (ret == 0) {
1476                 ret = do_unregister_con_driver(&vga_con);
1477
1478                 /* Ignore "already unregistered". */
1479                 if (ret == -ENODEV)
1480                         ret = 0;
1481         }
1482         console_unlock();
1483
1484         return ret;
1485 }
1486 #endif
1487
1488 static void i915_dump_device_info(struct drm_i915_private *dev_priv)
1489 {
1490 #if 0
1491         const struct intel_device_info *info = &dev_priv->info;
1492
1493 #define PRINT_S(name) "%s"
1494 #define SEP_EMPTY
1495 #define PRINT_FLAG(name) info->name ? #name "," : ""
1496 #define SEP_COMMA ,
1497         DRM_DEBUG_DRIVER("i915 device info: gen=%i, pciid=0x%04x flags="
1498                          DEV_INFO_FOR_EACH_FLAG(PRINT_S, SEP_EMPTY),
1499                          info->gen,
1500                          dev_priv->dev->pdev->device,
1501                          DEV_INFO_FOR_EACH_FLAG(PRINT_FLAG, SEP_COMMA));
1502 #undef PRINT_S
1503 #undef SEP_EMPTY
1504 #undef PRINT_FLAG
1505 #undef SEP_COMMA
1506 #endif
1507 }
1508
1509 /*
1510  * Determine various intel_device_info fields at runtime.
1511  *
1512  * Use it when either:
1513  *   - it's judged too laborious to fill n static structures with the limit
1514  *     when a simple if statement does the job,
1515  *   - run-time checks (eg read fuse/strap registers) are needed.
1516  *
1517  * This function needs to be called:
1518  *   - after the MMIO has been setup as we are reading registers,
1519  *   - after the PCH has been detected,
1520  *   - before the first usage of the fields it can tweak.
1521  */
1522 static void intel_device_info_runtime_init(struct drm_device *dev)
1523 {
1524         struct drm_i915_private *dev_priv = dev->dev_private;
1525         struct intel_device_info *info;
1526         enum i915_pipe pipe;
1527
1528         info = (struct intel_device_info *)&dev_priv->info;
1529
1530         if (IS_VALLEYVIEW(dev))
1531                 for_each_pipe(pipe)
1532                         info->num_sprites[pipe] = 2;
1533         else
1534                 for_each_pipe(pipe)
1535                         info->num_sprites[pipe] = 1;
1536
1537         if (i915.disable_display) {
1538                 DRM_INFO("Display disabled (module parameter)\n");
1539                 info->num_pipes = 0;
1540         } else if (info->num_pipes > 0 &&
1541                    (INTEL_INFO(dev)->gen == 7 || INTEL_INFO(dev)->gen == 8) &&
1542                    !IS_VALLEYVIEW(dev)) {
1543                 u32 fuse_strap = I915_READ(FUSE_STRAP);
1544                 u32 sfuse_strap = I915_READ(SFUSE_STRAP);
1545
1546                 /*
1547                  * SFUSE_STRAP is supposed to have a bit signalling the display
1548                  * is fused off. Unfortunately it seems that, at least in
1549                  * certain cases, fused off display means that PCH display
1550                  * reads don't land anywhere. In that case, we read 0s.
1551                  *
1552                  * On CPT/PPT, we can detect this case as SFUSE_STRAP_FUSE_LOCK
1553                  * should be set when taking over after the firmware.
1554                  */
1555                 if (fuse_strap & ILK_INTERNAL_DISPLAY_DISABLE ||
1556                     sfuse_strap & SFUSE_STRAP_DISPLAY_DISABLED ||
1557                     (dev_priv->pch_type == PCH_CPT &&
1558                      !(sfuse_strap & SFUSE_STRAP_FUSE_LOCK))) {
1559                         DRM_INFO("Display fused off, disabling\n");
1560                         info->num_pipes = 0;
1561                 }
1562         }
1563 }
1564
1565 /**
1566  * i915_driver_load - setup chip and create an initial config
1567  * @dev: DRM device
1568  * @flags: startup flags
1569  *
1570  * The driver load routine has to do several things:
1571  *   - drive output discovery via intel_modeset_init()
1572  *   - initialize the memory manager
1573  *   - allocate initial config memory
1574  *   - setup the DRM framebuffer with the allocated memory
1575  */
1576 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1577 {
1578         struct drm_i915_private *dev_priv = dev->dev_private;
1579         struct intel_device_info *info, *device_info;
1580         unsigned long base, size;
1581         int ret = 0, mmio_bar, mmio_size;
1582         uint32_t aperture_size;
1583         static struct pci_dev i915_pdev;
1584
1585         /* XXX: dev->pci_device not present in Linux drm */
1586         info = i915_get_device_id(dev->pci_device);
1587
1588         /* XXX: struct pci_dev */
1589         i915_pdev.dev = dev->dev;
1590         dev->pdev = &i915_pdev;
1591         dev->pdev->device = dev->pci_device;
1592
1593         /* Refuse to load on gen6+ without kms enabled. */
1594         if (info->gen >= 6 && !drm_core_check_feature(dev, DRIVER_MODESET)) {
1595                 DRM_INFO("Your hardware requires kernel modesetting (KMS)\n");
1596                 DRM_INFO("See CONFIG_DRM_I915_KMS, nomodeset, and i915.modeset parameters\n");
1597                 return -ENODEV;
1598         }
1599
1600         dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL);
1601         if (dev_priv == NULL)
1602                 return -ENOMEM;
1603
1604         dev->dev_private = (void *)dev_priv;
1605         dev_priv->dev = dev;
1606
1607         /* copy initial configuration to dev_priv->info */
1608         device_info = (struct intel_device_info *)&dev_priv->info;
1609         *device_info = *info;
1610
1611         lockinit(&dev_priv->irq_lock, "userirq", 0, LK_CANRECURSE);
1612         lockinit(&dev_priv->gpu_error.lock, "915err", 0, LK_CANRECURSE);
1613         spin_init(&dev_priv->backlight_lock, "i915bl");
1614         lockinit(&dev_priv->uncore.lock, "915gt", 0, LK_CANRECURSE);
1615         spin_init(&dev_priv->mm.object_stat_lock, "i915osl");
1616         lockinit(&dev_priv->dpio_lock, "i915dpio", 0, LK_CANRECURSE);
1617         lockinit(&dev_priv->modeset_restore_lock, "i915mrl", 0, LK_CANRECURSE);
1618
1619         intel_pm_setup(dev);
1620
1621         intel_display_crc_init(dev);
1622
1623         i915_dump_device_info(dev_priv);
1624
1625         /* Not all pre-production machines fall into this category, only the
1626          * very first ones. Almost everything should work, except for maybe
1627          * suspend/resume. And we don't implement workarounds that affect only
1628          * pre-production machines. */
1629         if (IS_HSW_EARLY_SDV(dev))
1630                 DRM_INFO("This is an early pre-production Haswell machine. "
1631                          "It may not be fully functional.\n");
1632
1633         if (i915_get_bridge_dev(dev)) {
1634                 ret = -EIO;
1635                 goto free_priv;
1636         }
1637
1638         mmio_bar = IS_GEN2(dev) ? 1 : 0;
1639         /* Before gen4, the registers and the GTT are behind different BARs.
1640          * However, from gen4 onwards, the registers and the GTT are shared
1641          * in the same BAR, so we want to restrict this ioremap from
1642          * clobbering the GTT which we want ioremap_wc instead. Fortunately,
1643          * the register BAR remains the same size for all the earlier
1644          * generations up to Ironlake.
1645          */
1646         if (info->gen < 5)
1647                 mmio_size = 512*1024;
1648         else
1649                 mmio_size = 2*1024*1024;
1650
1651 #if 0
1652         dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, mmio_size);
1653         if (!dev_priv->regs) {
1654                 DRM_ERROR("failed to map registers\n");
1655                 ret = -EIO;
1656                 goto put_bridge;
1657         }
1658 #else
1659         base = drm_get_resource_start(dev, mmio_bar);
1660         size = drm_get_resource_len(dev, mmio_bar);
1661
1662         ret = drm_addmap(dev, base, size, _DRM_REGISTERS,
1663             _DRM_KERNEL | _DRM_DRIVER, &dev_priv->mmio_map);
1664 #endif
1665
1666         /* This must be called before any calls to HAS_PCH_* */
1667         intel_detect_pch(dev);
1668
1669         intel_uncore_init(dev);
1670
1671         ret = i915_gem_gtt_init(dev);
1672         if (ret)
1673                 goto out_regs;
1674
1675         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1676                 ret = i915_kick_out_vgacon(dev_priv);
1677                 if (ret) {
1678                         DRM_ERROR("failed to remove conflicting VGA console\n");
1679                         goto out_gtt;
1680                 }
1681
1682                 i915_kick_out_firmware_fb(dev_priv);
1683         }
1684
1685 #if 0
1686         pci_set_master(dev->pdev);
1687
1688         /* overlay on gen2 is broken and can't address above 1G */
1689         if (IS_GEN2(dev))
1690                 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
1691
1692         /* 965GM sometimes incorrectly writes to hardware status page (HWS)
1693          * using 32bit addressing, overwriting memory if HWS is located
1694          * above 4GB.
1695          *
1696          * The documentation also mentions an issue with undefined
1697          * behaviour if any general state is accessed within a page above 4GB,
1698          * which also needs to be handled carefully.
1699          */
1700         if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1701                 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32));
1702 #endif
1703
1704         aperture_size = dev_priv->gtt.mappable_end;
1705
1706         dev_priv->gtt.mappable =
1707                 io_mapping_create_wc(dev_priv->gtt.mappable_base,
1708                                      aperture_size);
1709         if (dev_priv->gtt.mappable == NULL) {
1710                 ret = -EIO;
1711                 goto out_gtt;
1712         }
1713
1714         dev_priv->gtt.mtrr = arch_phys_wc_add(dev_priv->gtt.mappable_base,
1715                                               aperture_size);
1716
1717         /* The i915 workqueue is primarily used for batched retirement of
1718          * requests (and thus managing bo) once the task has been completed
1719          * by the GPU. i915_gem_retire_requests() is called directly when we
1720          * need high-priority retirement, such as waiting for an explicit
1721          * bo.
1722          *
1723          * It is also used for periodic low-priority events, such as
1724          * idle-timers and recording error state.
1725          *
1726          * All tasks on the workqueue are expected to acquire the dev mutex
1727          * so there is no point in running more than one instance of the
1728          * workqueue at any time.  Use an ordered one.
1729          */
1730         dev_priv->wq = alloc_ordered_workqueue("i915", 0);
1731         if (dev_priv->wq == NULL) {
1732                 DRM_ERROR("Failed to create our workqueue.\n");
1733                 ret = -ENOMEM;
1734                 goto out_mtrrfree;
1735         }
1736
1737         intel_irq_init(dev);
1738         intel_uncore_sanitize(dev);
1739
1740         /* Try to make sure MCHBAR is enabled before poking at it */
1741         intel_setup_mchbar(dev);
1742         intel_setup_gmbus(dev);
1743         intel_opregion_setup(dev);
1744
1745         intel_setup_bios(dev);
1746
1747         i915_gem_load(dev);
1748
1749         /* On the 945G/GM, the chipset reports the MSI capability on the
1750          * integrated graphics even though the support isn't actually there
1751          * according to the published specs.  It doesn't appear to function
1752          * correctly in testing on 945G.
1753          * This may be a side effect of MSI having been made available for PEG
1754          * and the registers being closely associated.
1755          *
1756          * According to chipset errata, on the 965GM, MSI interrupts may
1757          * be lost or delayed, but we use them anyways to avoid
1758          * stuck interrupts on some machines.
1759          */
1760 #if 0
1761         if (!IS_I945G(dev) && !IS_I945GM(dev))
1762                 pci_enable_msi(dev->pdev);
1763 #endif
1764
1765         intel_device_info_runtime_init(dev);
1766
1767         if (INTEL_INFO(dev)->num_pipes) {
1768                 ret = drm_vblank_init(dev, INTEL_INFO(dev)->num_pipes);
1769                 if (ret)
1770                         goto out_gem_unload;
1771         }
1772
1773         intel_power_domains_init(dev_priv);
1774
1775         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1776                 ret = i915_load_modeset_init(dev);
1777                 if (ret < 0) {
1778                         DRM_ERROR("failed to init modeset\n");
1779                         goto out_power_well;
1780                 }
1781         } else {
1782                 /* Start out suspended in ums mode. */
1783                 dev_priv->ums.mm_suspended = 1;
1784         }
1785
1786 #if 0
1787         i915_setup_sysfs(dev);
1788 #endif
1789
1790         if (INTEL_INFO(dev)->num_pipes) {
1791                 /* Must be done after probing outputs */
1792                 intel_opregion_init(dev);
1793 #if 0
1794                 acpi_video_register();
1795 #endif
1796         }
1797
1798         if (IS_GEN5(dev))
1799                 intel_gpu_ips_init(dev_priv);
1800
1801         intel_init_runtime_pm(dev_priv);
1802
1803         return 0;
1804
1805 out_power_well:
1806         intel_power_domains_remove(dev_priv);
1807         drm_vblank_cleanup(dev);
1808 out_gem_unload:
1809
1810         intel_teardown_gmbus(dev);
1811         intel_teardown_mchbar(dev);
1812         pm_qos_remove_request(&dev_priv->pm_qos);
1813         destroy_workqueue(dev_priv->wq);
1814 out_mtrrfree:
1815         arch_phys_wc_del(dev_priv->gtt.mtrr);
1816 #if 0
1817         io_mapping_free(dev_priv->gtt.mappable);
1818 #endif
1819 out_gtt:
1820         dev_priv->gtt.base.cleanup(&dev_priv->gtt.base);
1821 out_regs:
1822         intel_uncore_fini(dev);
1823 free_priv:
1824         kfree(dev_priv);
1825         return ret;
1826 }
1827
1828 int i915_driver_unload(struct drm_device *dev)
1829 {
1830         struct drm_i915_private *dev_priv = dev->dev_private;
1831         int ret;
1832
1833         ret = i915_gem_suspend(dev);
1834         if (ret) {
1835                 DRM_ERROR("failed to idle hardware: %d\n", ret);
1836                 return ret;
1837         }
1838
1839         intel_fini_runtime_pm(dev_priv);
1840
1841         intel_gpu_ips_teardown();
1842
1843         /* The i915.ko module is still not prepared to be loaded when
1844          * the power well is not enabled, so just enable it in case
1845          * we're going to unload/reload. */
1846         intel_display_set_init_power(dev_priv, true);
1847         intel_power_domains_remove(dev_priv);
1848
1849 #if 0
1850         i915_teardown_sysfs(dev);
1851
1852         WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier));
1853         unregister_shrinker(&dev_priv->mm.shrinker);
1854
1855         io_mapping_free(dev_priv->gtt.mappable);
1856 #endif
1857         arch_phys_wc_del(dev_priv->gtt.mtrr);
1858
1859 #if 0
1860         acpi_video_unregister();
1861 #endif
1862
1863         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1864                 intel_fbdev_fini(dev);
1865                 intel_modeset_cleanup(dev);
1866 #if 0
1867                 cancel_work_sync(&dev_priv->console_resume_work);
1868 #endif
1869
1870                 /*
1871                  * free the memory space allocated for the child device
1872                  * config parsed from VBT
1873                  */
1874                 if (dev_priv->vbt.child_dev && dev_priv->vbt.child_dev_num) {
1875                         kfree(dev_priv->vbt.child_dev);
1876                         dev_priv->vbt.child_dev = NULL;
1877                         dev_priv->vbt.child_dev_num = 0;
1878                 }
1879
1880         }
1881
1882         /* Free error state after interrupts are fully disabled. */
1883         del_timer_sync(&dev_priv->gpu_error.hangcheck_timer);
1884         cancel_work_sync(&dev_priv->gpu_error.work);
1885 #if 0
1886         i915_destroy_error_state(dev);
1887 #endif
1888
1889         intel_opregion_fini(dev);
1890
1891         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1892                 /* Flush any outstanding unpin_work. */
1893                 flush_workqueue(dev_priv->wq);
1894
1895                 mutex_lock(&dev->struct_mutex);
1896                 i915_gem_cleanup_ringbuffer(dev);
1897                 i915_gem_context_fini(dev);
1898                 WARN_ON(dev_priv->mm.aliasing_ppgtt);
1899                 mutex_unlock(&dev->struct_mutex);
1900 #if 0
1901                 i915_gem_cleanup_stolen(dev);
1902 #endif
1903
1904                 if (!I915_NEED_GFX_HWS(dev))
1905                         i915_free_hws(dev);
1906         }
1907
1908         WARN_ON(!list_empty(&dev_priv->vm_list));
1909
1910         drm_vblank_cleanup(dev);
1911
1912         intel_teardown_gmbus(dev);
1913         intel_teardown_mchbar(dev);
1914
1915         bus_generic_detach(dev->dev);
1916         drm_rmmap(dev, dev_priv->mmio_map);
1917
1918         destroy_workqueue(dev_priv->wq);
1919         pm_qos_remove_request(&dev_priv->pm_qos);
1920
1921         dev_priv->gtt.base.cleanup(&dev_priv->gtt.base);
1922
1923         intel_uncore_fini(dev);
1924 #if 0
1925         if (dev_priv->regs != NULL)
1926                 pci_iounmap(dev->pdev, dev_priv->regs);
1927 #endif
1928
1929         pci_dev_put(dev_priv->bridge_dev);
1930         kfree(dev_priv);
1931
1932         return 0;
1933 }
1934
1935 int i915_driver_open(struct drm_device *dev, struct drm_file *file)
1936 {
1937         int ret;
1938
1939         ret = i915_gem_open(dev, file);
1940         if (ret)
1941                 return ret;
1942
1943         return 0;
1944 }
1945
1946 /**
1947  * i915_driver_lastclose - clean up after all DRM clients have exited
1948  * @dev: DRM device
1949  *
1950  * Take care of cleaning up after all DRM clients have exited.  In the
1951  * mode setting case, we want to restore the kernel's initial mode (just
1952  * in case the last client left us in a bad state).
1953  *
1954  * Additionally, in the non-mode setting case, we'll tear down the GTT
1955  * and DMA structures, since the kernel won't be using them, and clea
1956  * up any GEM state.
1957  */
1958 void i915_driver_lastclose(struct drm_device * dev)
1959 {
1960         struct drm_i915_private *dev_priv = dev->dev_private;
1961
1962         /* On gen6+ we refuse to init without kms enabled, but then the drm core
1963          * goes right around and calls lastclose. Check for this and don't clean
1964          * up anything. */
1965         if (!dev_priv)
1966                 return;
1967
1968         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1969 #if 0
1970                 intel_fbdev_restore_mode(dev);
1971                 vga_switcheroo_process_delayed_switch();
1972 #endif
1973                 return;
1974         }
1975
1976         i915_gem_lastclose(dev);
1977
1978         i915_dma_cleanup(dev);
1979 }
1980
1981 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
1982 {
1983         mutex_lock(&dev->struct_mutex);
1984         i915_gem_context_close(dev, file_priv);
1985         i915_gem_release(dev, file_priv);
1986         mutex_unlock(&dev->struct_mutex);
1987 }
1988
1989 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
1990 {
1991         struct drm_i915_file_private *file_priv = file->driver_priv;
1992
1993         if (file_priv && file_priv->bsd_ring)
1994                 file_priv->bsd_ring = NULL;
1995         kfree(file_priv);
1996 }
1997
1998 struct drm_ioctl_desc i915_ioctls[] = {
1999         DRM_IOCTL_DEF_DRV(I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2000         DRM_IOCTL_DEF_DRV(I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
2001         DRM_IOCTL_DEF_DRV(I915_FLIP, i915_flip_bufs, DRM_AUTH),
2002         DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
2003         DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
2004         DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
2005         DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH|DRM_RENDER_ALLOW),
2006         DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2007         DRM_IOCTL_DEF_DRV(I915_ALLOC, drm_noop, DRM_AUTH),
2008         DRM_IOCTL_DEF_DRV(I915_FREE, drm_noop, DRM_AUTH),
2009         DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2010         DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
2011         DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP,  drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2012         DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE,  drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2013         DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH),
2014         DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
2015         DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2016         DRM_IOCTL_DEF_DRV(I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2017         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
2018         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED),
2019         DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2020         DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2021         DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
2022         DRM_IOCTL_DEF_DRV(I915_GEM_SET_CACHING, i915_gem_set_caching_ioctl, DRM_UNLOCKED),
2023         DRM_IOCTL_DEF_DRV(I915_GEM_GET_CACHING, i915_gem_get_caching_ioctl, DRM_UNLOCKED),
2024         DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED),
2025         DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2026         DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2027         DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED),
2028         DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED),
2029         DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED),
2030         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED),
2031         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED),
2032         DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED),
2033         DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED),
2034         DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED),
2035         DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED),
2036         DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED),
2037         DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
2038         DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED),
2039         DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2040         DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2041         DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2042         DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, intel_sprite_get_colorkey, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2043         DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_AUTH|DRM_UNLOCKED),
2044         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE, i915_gem_context_create_ioctl, DRM_UNLOCKED),
2045         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_UNLOCKED),
2046         DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_UNLOCKED),
2047         DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_get_reset_stats_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
2048 #if 0
2049         DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
2050 #endif
2051 };
2052
2053 int i915_max_ioctl = ARRAY_SIZE(i915_ioctls);
2054
2055 /*
2056  * This is really ugly: Because old userspace abused the linux agp interface to
2057  * manage the gtt, we need to claim that all intel devices are agp.  For
2058  * otherwise the drm core refuses to initialize the agp support code.
2059  */
2060 int i915_driver_device_is_agp(struct drm_device * dev)
2061 {
2062         return 1;
2063 }