SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 <linux/vgaarb.h>
  38 #include <linux/acpi.h>
  39 #include <linux/pnp.h>
  40 #include <linux/vga_switcheroo.h>
  41
  42 /* Really want an OS-independent resettable timer.  Would like to have
  43  * this loop run for (eg) 3 sec, but have the timer reset every time
  44  * the head pointer changes, so that EBUSY only happens if the ring
  45  * actually stalls for (eg) 3 seconds.
  46  */
  47 int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
  48 {
  49         drm_i915_private_t *dev_priv = dev->dev_private;
  50         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  51         u32 acthd_reg = IS_I965G(dev) ? ACTHD_I965 : ACTHD;
  52         u32 last_acthd = I915_READ(acthd_reg);
  53         u32 acthd;
  54         u32 last_head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
  55         int i;
  56
  57         trace_i915_ring_wait_begin (dev);
  58
  59         for (i = 0; i < 100000; i++) {
  60                 ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
  61                 acthd = I915_READ(acthd_reg);
  62                 ring->space = ring->head - (ring->tail + 8);
  63                 if (ring->space < 0)
  64                         ring->space += ring->Size;
  65                 if (ring->space >= n) {
  66                         trace_i915_ring_wait_end (dev);
  67                         return 0;
  68                 }
  69
  70                 if (dev->primary->master) {
  71                         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
  72                         if (master_priv->sarea_priv)
  73                                 master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
  74                 }
  75
  76
  77                 if (ring->head != last_head)
  78                         i = 0;
  79                 if (acthd != last_acthd)
  80                         i = 0;
  81
  82                 last_head = ring->head;
  83                 last_acthd = acthd;
  84                 msleep_interruptible(10);
  85
  86         }
  87
  88         trace_i915_ring_wait_end (dev);
  89         return -EBUSY;
  90 }
  91
  92 /* As a ringbuffer is only allowed to wrap between instructions, fill
  93  * the tail with NOOPs.
  94  */
  95 int i915_wrap_ring(struct drm_device *dev)
  96 {
  97         drm_i915_private_t *dev_priv = dev->dev_private;
  98         volatile unsigned int *virt;
  99         int rem;
 100
 101         rem = dev_priv->ring.Size - dev_priv->ring.tail;
 102         if (dev_priv->ring.space < rem) {
 103                 int ret = i915_wait_ring(dev, rem, __func__);
 104                 if (ret)
 105                         return ret;
 106         }
 107         dev_priv->ring.space -= rem;
 108
 109         virt = (unsigned int *)
 110                 (dev_priv->ring.virtual_start + dev_priv->ring.tail);
 111         rem /= 4;
 112         while (rem--)
 113                 *virt++ = MI_NOOP;
 114
 115         dev_priv->ring.tail = 0;
 116
 117         return 0;
 118 }
 119
 120 /**
 121  * Sets up the hardware status page for devices that need a physical address
 122  * in the register.
 123  */
 124 static int i915_init_phys_hws(struct drm_device *dev)
 125 {
 126         drm_i915_private_t *dev_priv = dev->dev_private;
 127         /* Program Hardware Status Page */
 128         dev_priv->status_page_dmah =
 129                 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE);
 130
 131         if (!dev_priv->status_page_dmah) {
 132                 DRM_ERROR("Can not allocate hardware status page\n");
 133                 return -ENOMEM;
 134         }
 135         dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
 136         dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
 137
 138         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 139
 140         if (IS_I965G(dev))
 141                 dev_priv->dma_status_page |= (dev_priv->dma_status_page >> 28) &
 142                                              0xf0;
 143
 144         I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 145         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 146         return 0;
 147 }
 148
 149 /**
 150  * Frees the hardware status page, whether it's a physical address or a virtual
 151  * address set up by the X Server.
 152  */
 153 static void i915_free_hws(struct drm_device *dev)
 154 {
 155         drm_i915_private_t *dev_priv = dev->dev_private;
 156         if (dev_priv->status_page_dmah) {
 157                 drm_pci_free(dev, dev_priv->status_page_dmah);
 158                 dev_priv->status_page_dmah = NULL;
 159         }
 160
 161         if (dev_priv->status_gfx_addr) {
 162                 dev_priv->status_gfx_addr = 0;
 163                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
 164         }
 165
 166         /* Need to rewrite hardware status page */
 167         I915_WRITE(HWS_PGA, 0x1ffff000);
 168 }
 169
 170 void i915_kernel_lost_context(struct drm_device * dev)
 171 {
 172         drm_i915_private_t *dev_priv = dev->dev_private;
 173         struct drm_i915_master_private *master_priv;
 174         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
 175
 176         /*
 177          * We should never lose context on the ring with modesetting
 178          * as we don't expose it to userspace
 179          */
 180         if (drm_core_check_feature(dev, DRIVER_MODESET))
 181                 return;
 182
 183         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 184         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 185         ring->space = ring->head - (ring->tail + 8);
 186         if (ring->space < 0)
 187                 ring->space += ring->Size;
 188
 189         if (!dev->primary->master)
 190                 return;
 191
 192         master_priv = dev->primary->master->driver_priv;
 193         if (ring->head == ring->tail && master_priv->sarea_priv)
 194                 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 195 }
 196
 197 static int i915_dma_cleanup(struct drm_device * dev)
 198 {
 199         drm_i915_private_t *dev_priv = dev->dev_private;
 200         /* Make sure interrupts are disabled here because the uninstall ioctl
 201          * may not have been called from userspace and after dev_private
 202          * is freed, it's too late.
 203          */
 204         if (dev->irq_enabled)
 205                 drm_irq_uninstall(dev);
 206
 207         if (dev_priv->ring.virtual_start) {
 208                 drm_core_ioremapfree(&dev_priv->ring.map, dev);
 209                 dev_priv->ring.virtual_start = NULL;
 210                 dev_priv->ring.map.handle = NULL;
 211                 dev_priv->ring.map.size = 0;
 212         }
 213
 214         /* Clear the HWS virtual address at teardown */
 215         if (I915_NEED_GFX_HWS(dev))
 216                 i915_free_hws(dev);
 217
 218         return 0;
 219 }
 220
 221 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 222 {
 223         drm_i915_private_t *dev_priv = dev->dev_private;
 224         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 225
 226         master_priv->sarea = drm_getsarea(dev);
 227         if (master_priv->sarea) {
 228                 master_priv->sarea_priv = (drm_i915_sarea_t *)
 229                         ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
 230         } else {
 231                 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
 232         }
 233
 234         if (init->ring_size != 0) {
 235                 if (dev_priv->ring.ring_obj != NULL) {
 236                         i915_dma_cleanup(dev);
 237                         DRM_ERROR("Client tried to initialize ringbuffer in "
 238                                   "GEM mode\n");
 239                         return -EINVAL;
 240                 }
 241
 242                 dev_priv->ring.Size = init->ring_size;
 243
 244                 dev_priv->ring.map.offset = init->ring_start;
 245                 dev_priv->ring.map.size = init->ring_size;
 246                 dev_priv->ring.map.type = 0;
 247                 dev_priv->ring.map.flags = 0;
 248                 dev_priv->ring.map.mtrr = 0;
 249
 250                 drm_core_ioremap_wc(&dev_priv->ring.map, dev);
 251
 252                 if (dev_priv->ring.map.handle == NULL) {
 253                         i915_dma_cleanup(dev);
 254                         DRM_ERROR("can not ioremap virtual address for"
 255                                   " ring buffer\n");
 256                         return -ENOMEM;
 257                 }
 258         }
 259
 260         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 261
 262         dev_priv->cpp = init->cpp;
 263         dev_priv->back_offset = init->back_offset;
 264         dev_priv->front_offset = init->front_offset;
 265         dev_priv->current_page = 0;
 266         if (master_priv->sarea_priv)
 267                 master_priv->sarea_priv->pf_current_page = 0;
 268
 269         /* Allow hardware batchbuffers unless told otherwise.
 270          */
 271         dev_priv->allow_batchbuffer = 1;
 272
 273         return 0;
 274 }
 275
 276 static int i915_dma_resume(struct drm_device * dev)
 277 {
 278         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 279
 280         DRM_DEBUG_DRIVER("%s\n", __func__);
 281
 282         if (dev_priv->ring.map.handle == NULL) {
 283                 DRM_ERROR("can not ioremap virtual address for"
 284                           " ring buffer\n");
 285                 return -ENOMEM;
 286         }
 287
 288         /* Program Hardware Status Page */
 289         if (!dev_priv->hw_status_page) {
 290                 DRM_ERROR("Can not find hardware status page\n");
 291                 return -EINVAL;
 292         }
 293         DRM_DEBUG_DRIVER("hw status page @ %p\n",
 294                                 dev_priv->hw_status_page);
 295
 296         if (dev_priv->status_gfx_addr != 0)
 297                 I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 298         else
 299                 I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 300         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 301
 302         return 0;
 303 }
 304
 305 static int i915_dma_init(struct drm_device *dev, void *data,
 306                          struct drm_file *file_priv)
 307 {
 308         drm_i915_init_t *init = data;
 309         int retcode = 0;
 310
 311         switch (init->func) {
 312         case I915_INIT_DMA:
 313                 retcode = i915_initialize(dev, init);
 314                 break;
 315         case I915_CLEANUP_DMA:
 316                 retcode = i915_dma_cleanup(dev);
 317                 break;
 318         case I915_RESUME_DMA:
 319                 retcode = i915_dma_resume(dev);
 320                 break;
 321         default:
 322                 retcode = -EINVAL;
 323                 break;
 324         }
 325
 326         return retcode;
 327 }
 328
 329 /* Implement basically the same security restrictions as hardware does
 330  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 331  *
 332  * Most of the calculations below involve calculating the size of a
 333  * particular instruction.  It's important to get the size right as
 334  * that tells us where the next instruction to check is.  Any illegal
 335  * instruction detected will be given a size of zero, which is a
 336  * signal to abort the rest of the buffer.
 337  */
 338 static int do_validate_cmd(int cmd)
 339 {
 340         switch (((cmd >> 29) & 0x7)) {
 341         case 0x0:
 342                 switch ((cmd >> 23) & 0x3f) {
 343                 case 0x0:
 344                         return 1;       /* MI_NOOP */
 345                 case 0x4:
 346                         return 1;       /* MI_FLUSH */
 347                 default:
 348                         return 0;       /* disallow everything else */
 349                 }
 350                 break;
 351         case 0x1:
 352                 return 0;       /* reserved */
 353         case 0x2:
 354                 return (cmd & 0xff) + 2;        /* 2d commands */
 355         case 0x3:
 356                 if (((cmd >> 24) & 0x1f) <= 0x18)
 357                         return 1;
 358
 359                 switch ((cmd >> 24) & 0x1f) {
 360                 case 0x1c:
 361                         return 1;
 362                 case 0x1d:
 363                         switch ((cmd >> 16) & 0xff) {
 364                         case 0x3:
 365                                 return (cmd & 0x1f) + 2;
 366                         case 0x4:
 367                                 return (cmd & 0xf) + 2;
 368                         default:
 369                                 return (cmd & 0xffff) + 2;
 370                         }
 371                 case 0x1e:
 372                         if (cmd & (1 << 23))
 373                                 return (cmd & 0xffff) + 1;
 374                         else
 375                                 return 1;
 376                 case 0x1f:
 377                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 378                                 return (cmd & 0x1ffff) + 2;
 379                         else if (cmd & (1 << 17))       /* indirect random */
 380                                 if ((cmd & 0xffff) == 0)
 381                                         return 0;       /* unknown length, too hard */
 382                                 else
 383                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 384                         else
 385                                 return 2;       /* indirect sequential */
 386                 default:
 387                         return 0;
 388                 }
 389         default:
 390                 return 0;
 391         }
 392
 393         return 0;
 394 }
 395
 396 static int validate_cmd(int cmd)
 397 {
 398         int ret = do_validate_cmd(cmd);
 399
 400 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 401
 402         return ret;
 403 }
 404
 405 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
 406 {
 407         drm_i915_private_t *dev_priv = dev->dev_private;
 408         int i;
 409         RING_LOCALS;
 410
 411         if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
 412                 return -EINVAL;
 413
 414         BEGIN_LP_RING((dwords+1)&~1);
 415
 416         for (i = 0; i < dwords;) {
 417                 int cmd, sz;
 418
 419                 cmd = buffer[i];
 420
 421                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 422                         return -EINVAL;
 423
 424                 OUT_RING(cmd);
 425
 426                 while (++i, --sz) {
 427                         OUT_RING(buffer[i]);
 428                 }
 429         }
 430
 431         if (dwords & 1)
 432                 OUT_RING(0);
 433
 434         ADVANCE_LP_RING();
 435
 436         return 0;
 437 }
 438
 439 int
 440 i915_emit_box(struct drm_device *dev,
 441               struct drm_clip_rect *boxes,
 442               int i, int DR1, int DR4)
 443 {
 444         drm_i915_private_t *dev_priv = dev->dev_private;
 445         struct drm_clip_rect box = boxes[i];
 446         RING_LOCALS;
 447
 448         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 449                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 450                           box.x1, box.y1, box.x2, box.y2);
 451                 return -EINVAL;
 452         }
 453
 454         if (IS_I965G(dev)) {
 455                 BEGIN_LP_RING(4);
 456                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 457                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 458                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 459                 OUT_RING(DR4);
 460                 ADVANCE_LP_RING();
 461         } else {
 462                 BEGIN_LP_RING(6);
 463                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 464                 OUT_RING(DR1);
 465                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 466                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 467                 OUT_RING(DR4);
 468                 OUT_RING(0);
 469                 ADVANCE_LP_RING();
 470         }
 471
 472         return 0;
 473 }
 474
 475 /* XXX: Emitting the counter should really be moved to part of the IRQ
 476  * emit. For now, do it in both places:
 477  */
 478
 479 static void i915_emit_breadcrumb(struct drm_device *dev)
 480 {
 481         drm_i915_private_t *dev_priv = dev->dev_private;
 482         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 483         RING_LOCALS;
 484
 485         dev_priv->counter++;
 486         if (dev_priv->counter > 0x7FFFFFFFUL)
 487                 dev_priv->counter = 0;
 488         if (master_priv->sarea_priv)
 489                 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
 490
 491         BEGIN_LP_RING(4);
 492         OUT_RING(MI_STORE_DWORD_INDEX);
 493         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 494         OUT_RING(dev_priv->counter);
 495         OUT_RING(0);
 496         ADVANCE_LP_RING();
 497 }
 498
 499 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 500                                    drm_i915_cmdbuffer_t *cmd,
 501                                    struct drm_clip_rect *cliprects,
 502                                    void *cmdbuf)
 503 {
 504         int nbox = cmd->num_cliprects;
 505         int i = 0, count, ret;
 506
 507         if (cmd->sz & 0x3) {
 508                 DRM_ERROR("alignment");
 509                 return -EINVAL;
 510         }
 511
 512         i915_kernel_lost_context(dev);
 513
 514         count = nbox ? nbox : 1;
 515
 516         for (i = 0; i < count; i++) {
 517                 if (i < nbox) {
 518                         ret = i915_emit_box(dev, cliprects, i,
 519                                             cmd->DR1, cmd->DR4);
 520                         if (ret)
 521                                 return ret;
 522                 }
 523
 524                 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
 525                 if (ret)
 526                         return ret;
 527         }
 528
 529         i915_emit_breadcrumb(dev);
 530         return 0;
 531 }
 532
 533 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 534                                      drm_i915_batchbuffer_t * batch,
 535                                      struct drm_clip_rect *cliprects)
 536 {
 537         drm_i915_private_t *dev_priv = dev->dev_private;
 538         int nbox = batch->num_cliprects;
 539         int i = 0, count;
 540         RING_LOCALS;
 541
 542         if ((batch->start | batch->used) & 0x7) {
 543                 DRM_ERROR("alignment");
 544                 return -EINVAL;
 545         }
 546
 547         i915_kernel_lost_context(dev);
 548
 549         count = nbox ? nbox : 1;
 550
 551         for (i = 0; i < count; i++) {
 552                 if (i < nbox) {
 553                         int ret = i915_emit_box(dev, cliprects, i,
 554                                                 batch->DR1, batch->DR4);
 555                         if (ret)
 556                                 return ret;
 557                 }
 558
 559                 if (!IS_I830(dev) && !IS_845G(dev)) {
 560                         BEGIN_LP_RING(2);
 561                         if (IS_I965G(dev)) {
 562                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 563                                 OUT_RING(batch->start);
 564                         } else {
 565                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 566                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 567                         }
 568                         ADVANCE_LP_RING();
 569                 } else {
 570                         BEGIN_LP_RING(4);
 571                         OUT_RING(MI_BATCH_BUFFER);
 572                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 573                         OUT_RING(batch->start + batch->used - 4);
 574                         OUT_RING(0);
 575                         ADVANCE_LP_RING();
 576                 }
 577         }
 578
 579         i915_emit_breadcrumb(dev);
 580
 581         return 0;
 582 }
 583
 584 static int i915_dispatch_flip(struct drm_device * dev)
 585 {
 586         drm_i915_private_t *dev_priv = dev->dev_private;
 587         struct drm_i915_master_private *master_priv =
 588                 dev->primary->master->driver_priv;
 589         RING_LOCALS;
 590
 591         if (!master_priv->sarea_priv)
 592                 return -EINVAL;
 593
 594         DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
 595                           __func__,
 596                          dev_priv->current_page,
 597                          master_priv->sarea_priv->pf_current_page);
 598
 599         i915_kernel_lost_context(dev);
 600
 601         BEGIN_LP_RING(2);
 602         OUT_RING(MI_FLUSH | MI_READ_FLUSH);
 603         OUT_RING(0);
 604         ADVANCE_LP_RING();
 605
 606         BEGIN_LP_RING(6);
 607         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 608         OUT_RING(0);
 609         if (dev_priv->current_page == 0) {
 610                 OUT_RING(dev_priv->back_offset);
 611                 dev_priv->current_page = 1;
 612         } else {
 613                 OUT_RING(dev_priv->front_offset);
 614                 dev_priv->current_page = 0;
 615         }
 616         OUT_RING(0);
 617         ADVANCE_LP_RING();
 618
 619         BEGIN_LP_RING(2);
 620         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 621         OUT_RING(0);
 622         ADVANCE_LP_RING();
 623
 624         master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 625
 626         BEGIN_LP_RING(4);
 627         OUT_RING(MI_STORE_DWORD_INDEX);
 628         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 629         OUT_RING(dev_priv->counter);
 630         OUT_RING(0);
 631         ADVANCE_LP_RING();
 632
 633         master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 634         return 0;
 635 }
 636
 637 static int i915_quiescent(struct drm_device * dev)
 638 {
 639         drm_i915_private_t *dev_priv = dev->dev_private;
 640
 641         i915_kernel_lost_context(dev);
 642         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __func__);
 643 }
 644
 645 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 646                             struct drm_file *file_priv)
 647 {
 648         int ret;
 649
 650         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 651
 652         mutex_lock(&dev->struct_mutex);
 653         ret = i915_quiescent(dev);
 654         mutex_unlock(&dev->struct_mutex);
 655
 656         return ret;
 657 }
 658
 659 static int i915_batchbuffer(struct drm_device *dev, void *data,
 660                             struct drm_file *file_priv)
 661 {
 662         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 663         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 664         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 665             master_priv->sarea_priv;
 666         drm_i915_batchbuffer_t *batch = data;
 667         int ret;
 668         struct drm_clip_rect *cliprects = NULL;
 669
 670         if (!dev_priv->allow_batchbuffer) {
 671                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 672                 return -EINVAL;
 673         }
 674
 675         DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
 676                         batch->start, batch->used, batch->num_cliprects);
 677
 678         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 679
 680         if (batch->num_cliprects < 0)
 681                 return -EINVAL;
 682
 683         if (batch->num_cliprects) {
 684                 cliprects = kcalloc(batch->num_cliprects,
 685                                     sizeof(struct drm_clip_rect),
 686                                     GFP_KERNEL);
 687                 if (cliprects == NULL)
 688                         return -ENOMEM;
 689
 690                 ret = copy_from_user(cliprects, batch->cliprects,
 691                                      batch->num_cliprects *
 692                                      sizeof(struct drm_clip_rect));
 693                 if (ret != 0)
 694                         goto fail_free;
 695         }
 696
 697         mutex_lock(&dev->struct_mutex);
 698         ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
 699         mutex_unlock(&dev->struct_mutex);
 700
 701         if (sarea_priv)
 702                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 703
 704 fail_free:
 705         kfree(cliprects);
 706
 707         return ret;
 708 }
 709
 710 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 711                           struct drm_file *file_priv)
 712 {
 713         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 714         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 715         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 716             master_priv->sarea_priv;
 717         drm_i915_cmdbuffer_t *cmdbuf = data;
 718         struct drm_clip_rect *cliprects = NULL;
 719         void *batch_data;
 720         int ret;
 721
 722         DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 723                         cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 724
 725         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 726
 727         if (cmdbuf->num_cliprects < 0)
 728                 return -EINVAL;
 729
 730         batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
 731         if (batch_data == NULL)
 732                 return -ENOMEM;
 733
 734         ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
 735         if (ret != 0)
 736                 goto fail_batch_free;
 737
 738         if (cmdbuf->num_cliprects) {
 739                 cliprects = kcalloc(cmdbuf->num_cliprects,
 740                                     sizeof(struct drm_clip_rect), GFP_KERNEL);
 741                 if (cliprects == NULL) {
 742                         ret = -ENOMEM;
 743                         goto fail_batch_free;
 744                 }
 745
 746                 ret = copy_from_user(cliprects, cmdbuf->cliprects,
 747                                      cmdbuf->num_cliprects *
 748                                      sizeof(struct drm_clip_rect));
 749                 if (ret != 0)
 750                         goto fail_clip_free;
 751         }
 752
 753         mutex_lock(&dev->struct_mutex);
 754         ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
 755         mutex_unlock(&dev->struct_mutex);
 756         if (ret) {
 757                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 758                 goto fail_clip_free;
 759         }
 760
 761         if (sarea_priv)
 762                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 763
 764 fail_clip_free:
 765         kfree(cliprects);
 766 fail_batch_free:
 767         kfree(batch_data);
 768
 769         return ret;
 770 }
 771
 772 static int i915_flip_bufs(struct drm_device *dev, void *data,
 773                           struct drm_file *file_priv)
 774 {
 775         int ret;
 776
 777         DRM_DEBUG_DRIVER("%s\n", __func__);
 778
 779         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 780
 781         mutex_lock(&dev->struct_mutex);
 782         ret = i915_dispatch_flip(dev);
 783         mutex_unlock(&dev->struct_mutex);
 784
 785         return ret;
 786 }
 787
 788 static int i915_getparam(struct drm_device *dev, void *data,
 789                          struct drm_file *file_priv)
 790 {
 791         drm_i915_private_t *dev_priv = dev->dev_private;
 792         drm_i915_getparam_t *param = data;
 793         int value;
 794
 795         if (!dev_priv) {
 796                 DRM_ERROR("called with no initialization\n");
 797                 return -EINVAL;
 798         }
 799
 800         switch (param->param) {
 801         case I915_PARAM_IRQ_ACTIVE:
 802                 value = dev->pdev->irq ? 1 : 0;
 803                 break;
 804         case I915_PARAM_ALLOW_BATCHBUFFER:
 805                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 806                 break;
 807         case I915_PARAM_LAST_DISPATCH:
 808                 value = READ_BREADCRUMB(dev_priv);
 809                 break;
 810         case I915_PARAM_CHIPSET_ID:
 811                 value = dev->pci_device;
 812                 break;
 813         case I915_PARAM_HAS_GEM:
 814                 value = dev_priv->has_gem;
 815                 break;
 816         case I915_PARAM_NUM_FENCES_AVAIL:
 817                 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
 818                 break;
 819         case I915_PARAM_HAS_OVERLAY:
 820                 value = dev_priv->overlay ? 1 : 0;
 821                 break;
 822         case I915_PARAM_HAS_PAGEFLIPPING:
 823                 value = 1;
 824                 break;
 825         case I915_PARAM_HAS_EXECBUF2:
 826                 /* depends on GEM */
 827                 value = dev_priv->has_gem;
 828                 break;
 829         default:
 830                 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
 831                                  param->param);
 832                 return -EINVAL;
 833         }
 834
 835         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
 836                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 837                 return -EFAULT;
 838         }
 839
 840         return 0;
 841 }
 842
 843 static int i915_setparam(struct drm_device *dev, void *data,
 844                          struct drm_file *file_priv)
 845 {
 846         drm_i915_private_t *dev_priv = dev->dev_private;
 847         drm_i915_setparam_t *param = data;
 848
 849         if (!dev_priv) {
 850                 DRM_ERROR("called with no initialization\n");
 851                 return -EINVAL;
 852         }
 853
 854         switch (param->param) {
 855         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 856                 break;
 857         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 858                 dev_priv->tex_lru_log_granularity = param->value;
 859                 break;
 860         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 861                 dev_priv->allow_batchbuffer = param->value;
 862                 break;
 863         case I915_SETPARAM_NUM_USED_FENCES:
 864                 if (param->value > dev_priv->num_fence_regs ||
 865                     param->value < 0)
 866                         return -EINVAL;
 867                 /* Userspace can use first N regs */
 868                 dev_priv->fence_reg_start = param->value;
 869                 break;
 870         default:
 871                 DRM_DEBUG_DRIVER("unknown parameter %d\n",
 872                                         param->param);
 873                 return -EINVAL;
 874         }
 875
 876         return 0;
 877 }
 878
 879 static int i915_set_status_page(struct drm_device *dev, void *data,
 880                                 struct drm_file *file_priv)
 881 {
 882         drm_i915_private_t *dev_priv = dev->dev_private;
 883         drm_i915_hws_addr_t *hws = data;
 884
 885         if (!I915_NEED_GFX_HWS(dev))
 886                 return -EINVAL;
 887
 888         if (!dev_priv) {
 889                 DRM_ERROR("called with no initialization\n");
 890                 return -EINVAL;
 891         }
 892
 893         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 894                 WARN(1, "tried to set status page when mode setting active\n");
 895                 return 0;
 896         }
 897
 898         DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
 899
 900         dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
 901
 902         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 903         dev_priv->hws_map.size = 4*1024;
 904         dev_priv->hws_map.type = 0;
 905         dev_priv->hws_map.flags = 0;
 906         dev_priv->hws_map.mtrr = 0;
 907
 908         drm_core_ioremap_wc(&dev_priv->hws_map, dev);
 909         if (dev_priv->hws_map.handle == NULL) {
 910                 i915_dma_cleanup(dev);
 911                 dev_priv->status_gfx_addr = 0;
 912                 DRM_ERROR("can not ioremap virtual address for"
 913                                 " G33 hw status page\n");
 914                 return -ENOMEM;
 915         }
 916         dev_priv->hw_status_page = dev_priv->hws_map.handle;
 917
 918         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 919         I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 920         DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
 921                                 dev_priv->status_gfx_addr);
 922         DRM_DEBUG_DRIVER("load hws at %p\n",
 923                                 dev_priv->hw_status_page);
 924         return 0;
 925 }
 926
 927 static int i915_get_bridge_dev(struct drm_device *dev)
 928 {
 929         struct drm_i915_private *dev_priv = dev->dev_private;
 930
 931         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 932         if (!dev_priv->bridge_dev) {
 933                 DRM_ERROR("bridge device not found\n");
 934                 return -1;
 935         }
 936         return 0;
 937 }
 938
 939 #define MCHBAR_I915 0x44
 940 #define MCHBAR_I965 0x48
 941 #define MCHBAR_SIZE (4*4096)
 942
 943 #define DEVEN_REG 0x54
 944 #define   DEVEN_MCHBAR_EN (1 << 28)
 945
 946 /* Allocate space for the MCH regs if needed, return nonzero on error */
 947 static int
 948 intel_alloc_mchbar_resource(struct drm_device *dev)
 949 {
 950         drm_i915_private_t *dev_priv = dev->dev_private;
 951         int reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915;
 952         u32 temp_lo, temp_hi = 0;
 953         u64 mchbar_addr;
 954         int ret = 0;
 955
 956         if (IS_I965G(dev))
 957                 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
 958         pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
 959         mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
 960
 961         /* If ACPI doesn't have it, assume we need to allocate it ourselves */
 962 #ifdef CONFIG_PNP
 963         if (mchbar_addr &&
 964             pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE)) {
 965                 ret = 0;
 966                 goto out;
 967         }
 968 #endif
 969
 970         /* Get some space for it */
 971         ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus, &dev_priv->mch_res,
 972                                      MCHBAR_SIZE, MCHBAR_SIZE,
 973                                      PCIBIOS_MIN_MEM,
 974                                      0,   pcibios_align_resource,
 975                                      dev_priv->bridge_dev);
 976         if (ret) {
 977                 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
 978                 dev_priv->mch_res.start = 0;
 979                 goto out;
 980         }
 981
 982         if (IS_I965G(dev))
 983                 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
 984                                        upper_32_bits(dev_priv->mch_res.start));
 985
 986         pci_write_config_dword(dev_priv->bridge_dev, reg,
 987                                lower_32_bits(dev_priv->mch_res.start));
 988 out:
 989         return ret;
 990 }
 991
 992 /* Setup MCHBAR if possible, return true if we should disable it again */
 993 static void
 994 intel_setup_mchbar(struct drm_device *dev)
 995 {
 996         drm_i915_private_t *dev_priv = dev->dev_private;
 997         int mchbar_reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915;
 998         u32 temp;
 999         bool enabled;
1000
1001         dev_priv->mchbar_need_disable = false;
1002
1003         if (IS_I915G(dev) || IS_I915GM(dev)) {
1004                 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
1005                 enabled = !!(temp & DEVEN_MCHBAR_EN);
1006         } else {
1007                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1008                 enabled = temp & 1;
1009         }
1010
1011         /* If it's already enabled, don't have to do anything */
1012         if (enabled)
1013                 return;
1014
1015         if (intel_alloc_mchbar_resource(dev))
1016                 return;
1017
1018         dev_priv->mchbar_need_disable = true;
1019
1020         /* Space is allocated or reserved, so enable it. */
1021         if (IS_I915G(dev) || IS_I915GM(dev)) {
1022                 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
1023                                        temp | DEVEN_MCHBAR_EN);
1024         } else {
1025                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1026                 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
1027         }
1028 }
1029
1030 static void
1031 intel_teardown_mchbar(struct drm_device *dev)
1032 {
1033         drm_i915_private_t *dev_priv = dev->dev_private;
1034         int mchbar_reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915;
1035         u32 temp;
1036
1037         if (dev_priv->mchbar_need_disable) {
1038                 if (IS_I915G(dev) || IS_I915GM(dev)) {
1039                         pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
1040                         temp &= ~DEVEN_MCHBAR_EN;
1041                         pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
1042                 } else {
1043                         pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1044                         temp &= ~1;
1045                         pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
1046                 }
1047         }
1048
1049         if (dev_priv->mch_res.start)
1050                 release_resource(&dev_priv->mch_res);
1051 }
1052
1053 /**
1054  * i915_probe_agp - get AGP bootup configuration
1055  * @pdev: PCI device
1056  * @aperture_size: returns AGP aperture configured size
1057  * @preallocated_size: returns size of BIOS preallocated AGP space
1058  *
1059  * Since Intel integrated graphics are UMA, the BIOS has to set aside
1060  * some RAM for the framebuffer at early boot.  This code figures out
1061  * how much was set aside so we can use it for our own purposes.
1062  */
1063 static int i915_probe_agp(struct drm_device *dev, uint32_t *aperture_size,
1064                           uint32_t *preallocated_size,
1065                           uint32_t *start)
1066 {
1067         struct drm_i915_private *dev_priv = dev->dev_private;
1068         u16 tmp = 0;
1069         unsigned long overhead;
1070         unsigned long stolen;
1071
1072         /* Get the fb aperture size and "stolen" memory amount. */
1073         pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &tmp);
1074
1075         *aperture_size = 1024 * 1024;
1076         *preallocated_size = 1024 * 1024;
1077
1078         switch (dev->pdev->device) {
1079         case PCI_DEVICE_ID_INTEL_82830_CGC:
1080         case PCI_DEVICE_ID_INTEL_82845G_IG:
1081         case PCI_DEVICE_ID_INTEL_82855GM_IG:
1082         case PCI_DEVICE_ID_INTEL_82865_IG:
1083                 if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M)
1084                         *aperture_size *= 64;
1085                 else
1086                         *aperture_size *= 128;
1087                 break;
1088         default:
1089                 /* 9xx supports large sizes, just look at the length */
1090                 *aperture_size = pci_resource_len(dev->pdev, 2);
1091                 break;
1092         }
1093
1094         /*
1095          * Some of the preallocated space is taken by the GTT
1096          * and popup.  GTT is 1K per MB of aperture size, and popup is 4K.
1097          */
1098         if (IS_G4X(dev) || IS_PINEVIEW(dev) || IS_IRONLAKE(dev) || IS_GEN6(dev))
1099                 overhead = 4096;
1100         else
1101                 overhead = (*aperture_size / 1024) + 4096;
1102
1103         if (IS_GEN6(dev)) {
1104                 /* SNB has memory control reg at 0x50.w */
1105                 pci_read_config_word(dev->pdev, SNB_GMCH_CTRL, &tmp);
1106
1107                 switch (tmp & SNB_GMCH_GMS_STOLEN_MASK) {
1108                 case INTEL_855_GMCH_GMS_DISABLED:
1109                         DRM_ERROR("video memory is disabled\n");
1110                         return -1;
1111                 case SNB_GMCH_GMS_STOLEN_32M:
1112                         stolen = 32 * 1024 * 1024;
1113                         break;
1114                 case SNB_GMCH_GMS_STOLEN_64M:
1115                         stolen = 64 * 1024 * 1024;
1116                         break;
1117                 case SNB_GMCH_GMS_STOLEN_96M:
1118                         stolen = 96 * 1024 * 1024;
1119                         break;
1120                 case SNB_GMCH_GMS_STOLEN_128M:
1121                         stolen = 128 * 1024 * 1024;
1122                         break;
1123                 case SNB_GMCH_GMS_STOLEN_160M:
1124                         stolen = 160 * 1024 * 1024;
1125                         break;
1126                 case SNB_GMCH_GMS_STOLEN_192M:
1127                         stolen = 192 * 1024 * 1024;
1128                         break;
1129                 case SNB_GMCH_GMS_STOLEN_224M:
1130                         stolen = 224 * 1024 * 1024;
1131                         break;
1132                 case SNB_GMCH_GMS_STOLEN_256M:
1133                         stolen = 256 * 1024 * 1024;
1134                         break;
1135                 case SNB_GMCH_GMS_STOLEN_288M:
1136                         stolen = 288 * 1024 * 1024;
1137                         break;
1138                 case SNB_GMCH_GMS_STOLEN_320M:
1139                         stolen = 320 * 1024 * 1024;
1140                         break;
1141                 case SNB_GMCH_GMS_STOLEN_352M:
1142                         stolen = 352 * 1024 * 1024;
1143                         break;
1144                 case SNB_GMCH_GMS_STOLEN_384M:
1145                         stolen = 384 * 1024 * 1024;
1146                         break;
1147                 case SNB_GMCH_GMS_STOLEN_416M:
1148                         stolen = 416 * 1024 * 1024;
1149                         break;
1150                 case SNB_GMCH_GMS_STOLEN_448M:
1151                         stolen = 448 * 1024 * 1024;
1152                         break;
1153                 case SNB_GMCH_GMS_STOLEN_480M:
1154                         stolen = 480 * 1024 * 1024;
1155                         break;
1156                 case SNB_GMCH_GMS_STOLEN_512M:
1157                         stolen = 512 * 1024 * 1024;
1158                         break;
1159                 default:
1160                         DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n",
1161                                   tmp & SNB_GMCH_GMS_STOLEN_MASK);
1162                         return -1;
1163                 }
1164         } else {
1165                 switch (tmp & INTEL_GMCH_GMS_MASK) {
1166                 case INTEL_855_GMCH_GMS_DISABLED:
1167                         DRM_ERROR("video memory is disabled\n");
1168                         return -1;
1169                 case INTEL_855_GMCH_GMS_STOLEN_1M:
1170                         stolen = 1 * 1024 * 1024;
1171                         break;
1172                 case INTEL_855_GMCH_GMS_STOLEN_4M:
1173                         stolen = 4 * 1024 * 1024;
1174                         break;
1175                 case INTEL_855_GMCH_GMS_STOLEN_8M:
1176                         stolen = 8 * 1024 * 1024;
1177                         break;
1178                 case INTEL_855_GMCH_GMS_STOLEN_16M:
1179                         stolen = 16 * 1024 * 1024;
1180                         break;
1181                 case INTEL_855_GMCH_GMS_STOLEN_32M:
1182                         stolen = 32 * 1024 * 1024;
1183                         break;
1184                 case INTEL_915G_GMCH_GMS_STOLEN_48M:
1185                         stolen = 48 * 1024 * 1024;
1186                         break;
1187                 case INTEL_915G_GMCH_GMS_STOLEN_64M:
1188                         stolen = 64 * 1024 * 1024;
1189                         break;
1190                 case INTEL_GMCH_GMS_STOLEN_128M:
1191                         stolen = 128 * 1024 * 1024;
1192                         break;
1193                 case INTEL_GMCH_GMS_STOLEN_256M:
1194                         stolen = 256 * 1024 * 1024;
1195                         break;
1196                 case INTEL_GMCH_GMS_STOLEN_96M:
1197                         stolen = 96 * 1024 * 1024;
1198                         break;
1199                 case INTEL_GMCH_GMS_STOLEN_160M:
1200                         stolen = 160 * 1024 * 1024;
1201                         break;
1202                 case INTEL_GMCH_GMS_STOLEN_224M:
1203                         stolen = 224 * 1024 * 1024;
1204                         break;
1205                 case INTEL_GMCH_GMS_STOLEN_352M:
1206                         stolen = 352 * 1024 * 1024;
1207                         break;
1208                 default:
1209                         DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n",
1210                                   tmp & INTEL_GMCH_GMS_MASK);
1211                         return -1;
1212                 }
1213         }
1214
1215         *preallocated_size = stolen - overhead;
1216         *start = overhead;
1217
1218         return 0;
1219 }
1220
1221 #define PTE_ADDRESS_MASK                0xfffff000
1222 #define PTE_ADDRESS_MASK_HIGH           0x000000f0 /* i915+ */
1223 #define PTE_MAPPING_TYPE_UNCACHED       (0 << 1)
1224 #define PTE_MAPPING_TYPE_DCACHE         (1 << 1) /* i830 only */
1225 #define PTE_MAPPING_TYPE_CACHED         (3 << 1)
1226 #define PTE_MAPPING_TYPE_MASK           (3 << 1)
1227 #define PTE_VALID                       (1 << 0)
1228
1229 /**
1230  * i915_gtt_to_phys - take a GTT address and turn it into a physical one
1231  * @dev: drm device
1232  * @gtt_addr: address to translate
1233  *
1234  * Some chip functions require allocations from stolen space but need the
1235  * physical address of the memory in question.  We use this routine
1236  * to get a physical address suitable for register programming from a given
1237  * GTT address.
1238  */
1239 static unsigned long i915_gtt_to_phys(struct drm_device *dev,
1240                                       unsigned long gtt_addr)
1241 {
1242         unsigned long *gtt;
1243         unsigned long entry, phys;
1244         int gtt_bar = IS_I9XX(dev) ? 0 : 1;
1245         int gtt_offset, gtt_size;
1246
1247         if (IS_I965G(dev)) {
1248                 if (IS_G4X(dev) || IS_IRONLAKE(dev) || IS_GEN6(dev)) {
1249                         gtt_offset = 2*1024*1024;
1250                         gtt_size = 2*1024*1024;
1251                 } else {
1252                         gtt_offset = 512*1024;
1253                         gtt_size = 512*1024;
1254                 }
1255         } else {
1256                 gtt_bar = 3;
1257                 gtt_offset = 0;
1258                 gtt_size = pci_resource_len(dev->pdev, gtt_bar);
1259         }
1260
1261         gtt = ioremap_wc(pci_resource_start(dev->pdev, gtt_bar) + gtt_offset,
1262                          gtt_size);
1263         if (!gtt) {
1264                 DRM_ERROR("ioremap of GTT failed\n");
1265                 return 0;
1266         }
1267
1268         entry = *(volatile u32 *)(gtt + (gtt_addr / 1024));
1269
1270         DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, PTE: 0x%08lx\n", gtt_addr, entry);
1271
1272         /* Mask out these reserved bits on this hardware. */
1273         if (!IS_I9XX(dev) || IS_I915G(dev) || IS_I915GM(dev) ||
1274             IS_I945G(dev) || IS_I945GM(dev)) {
1275                 entry &= ~PTE_ADDRESS_MASK_HIGH;
1276         }
1277
1278         /* If it's not a mapping type we know, then bail. */
1279         if ((entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_UNCACHED &&
1280             (entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_CACHED) {
1281                 iounmap(gtt);
1282                 return 0;
1283         }
1284
1285         if (!(entry & PTE_VALID)) {
1286                 DRM_ERROR("bad GTT entry in stolen space\n");
1287                 iounmap(gtt);
1288                 return 0;
1289         }
1290
1291         iounmap(gtt);
1292
1293         phys =(entry & PTE_ADDRESS_MASK) |
1294                 ((uint64_t)(entry & PTE_ADDRESS_MASK_HIGH) << (32 - 4));
1295
1296         DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, phys addr: 0x%08lx\n", gtt_addr, phys);
1297
1298         return phys;
1299 }
1300
1301 static void i915_warn_stolen(struct drm_device *dev)
1302 {
1303         DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1304         DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1305 }
1306
1307 static void i915_setup_compression(struct drm_device *dev, int size)
1308 {
1309         struct drm_i915_private *dev_priv = dev->dev_private;
1310         struct drm_mm_node *compressed_fb, *compressed_llb;
1311         unsigned long cfb_base;
1312         unsigned long ll_base = 0;
1313
1314         /* Leave 1M for line length buffer & misc. */
1315         compressed_fb = drm_mm_search_free(&dev_priv->vram, size, 4096, 0);
1316         if (!compressed_fb) {
1317                 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1318                 i915_warn_stolen(dev);
1319                 return;
1320         }
1321
1322         compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1323         if (!compressed_fb) {
1324                 i915_warn_stolen(dev);
1325                 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1326                 return;
1327         }
1328
1329         cfb_base = i915_gtt_to_phys(dev, compressed_fb->start);
1330         if (!cfb_base) {
1331                 DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1332                 drm_mm_put_block(compressed_fb);
1333         }
1334
1335         if (!IS_GM45(dev)) {
1336                 compressed_llb = drm_mm_search_free(&dev_priv->vram, 4096,
1337                                                     4096, 0);
1338                 if (!compressed_llb) {
1339                         i915_warn_stolen(dev);
1340                         return;
1341                 }
1342
1343                 compressed_llb = drm_mm_get_block(compressed_llb, 4096, 4096);
1344                 if (!compressed_llb) {
1345                         i915_warn_stolen(dev);
1346                         return;
1347                 }
1348
1349                 ll_base = i915_gtt_to_phys(dev, compressed_llb->start);
1350                 if (!ll_base) {
1351                         DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1352                         drm_mm_put_block(compressed_fb);
1353                         drm_mm_put_block(compressed_llb);
1354                 }
1355         }
1356
1357         dev_priv->cfb_size = size;
1358
1359         if (IS_GM45(dev)) {
1360                 g4x_disable_fbc(dev);
1361                 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1362         } else {
1363                 i8xx_disable_fbc(dev);
1364                 I915_WRITE(FBC_CFB_BASE, cfb_base);
1365                 I915_WRITE(FBC_LL_BASE, ll_base);
1366         }
1367
1368         DRM_DEBUG("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", cfb_base,
1369                   ll_base, size >> 20);
1370 }
1371
1372 /* true = enable decode, false = disable decoder */
1373 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1374 {
1375         struct drm_device *dev = cookie;
1376
1377         intel_modeset_vga_set_state(dev, state);
1378         if (state)
1379                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1380                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1381         else
1382                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1383 }
1384
1385 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1386 {
1387         struct drm_device *dev = pci_get_drvdata(pdev);
1388         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
1389         if (state == VGA_SWITCHEROO_ON) {
1390                 printk(KERN_INFO "i915: switched off\n");
1391                 /* i915 resume handler doesn't set to D0 */
1392                 pci_set_power_state(dev->pdev, PCI_D0);
1393                 i915_resume(dev);
1394         } else {
1395                 printk(KERN_ERR "i915: switched off\n");
1396                 i915_suspend(dev, pmm);
1397         }
1398 }
1399
1400 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
1401 {
1402         struct drm_device *dev = pci_get_drvdata(pdev);
1403         bool can_switch;
1404
1405         spin_lock(&dev->count_lock);
1406         can_switch = (dev->open_count == 0);
1407         spin_unlock(&dev->count_lock);
1408         return can_switch;
1409 }
1410
1411 static int i915_load_modeset_init(struct drm_device *dev,
1412                                   unsigned long prealloc_start,
1413                                   unsigned long prealloc_size,
1414                                   unsigned long agp_size)
1415 {
1416         struct drm_i915_private *dev_priv = dev->dev_private;
1417         int fb_bar = IS_I9XX(dev) ? 2 : 0;
1418         int ret = 0;
1419
1420         dev->mode_config.fb_base = drm_get_resource_start(dev, fb_bar) &
1421                 0xff000000;
1422
1423         /* Basic memrange allocator for stolen space (aka vram) */
1424         drm_mm_init(&dev_priv->vram, 0, prealloc_size);
1425         DRM_INFO("set up %ldM of stolen space\n", prealloc_size / (1024*1024));
1426
1427         /* We're off and running w/KMS */
1428         dev_priv->mm.suspended = 0;
1429
1430         /* Let GEM Manage from end of prealloc space to end of aperture.
1431          *
1432          * However, leave one page at the end still bound to the scratch page.
1433          * There are a number of places where the hardware apparently
1434          * prefetches past the end of the object, and we've seen multiple
1435          * hangs with the GPU head pointer stuck in a batchbuffer bound
1436          * at the last page of the aperture.  One page should be enough to
1437          * keep any prefetching inside of the aperture.
1438          */
1439         i915_gem_do_init(dev, prealloc_size, agp_size - 4096);
1440
1441         mutex_lock(&dev->struct_mutex);
1442         ret = i915_gem_init_ringbuffer(dev);
1443         mutex_unlock(&dev->struct_mutex);
1444         if (ret)
1445                 goto out;
1446
1447         /* Try to set up FBC with a reasonable compressed buffer size */
1448         if (I915_HAS_FBC(dev) && i915_powersave) {
1449                 int cfb_size;
1450
1451                 /* Try to get an 8M buffer... */
1452                 if (prealloc_size > (9*1024*1024))
1453                         cfb_size = 8*1024*1024;
1454                 else /* fall back to 7/8 of the stolen space */
1455                         cfb_size = prealloc_size * 7 / 8;
1456                 i915_setup_compression(dev, cfb_size);
1457         }
1458
1459         /* Allow hardware batchbuffers unless told otherwise.
1460          */
1461         dev_priv->allow_batchbuffer = 1;
1462
1463         ret = intel_init_bios(dev);
1464         if (ret)
1465                 DRM_INFO("failed to find VBIOS tables\n");
1466
1467         /* if we have > 1 VGA cards, then disable the radeon VGA resources */
1468         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1469         if (ret)
1470                 goto destroy_ringbuffer;
1471
1472         ret = vga_switcheroo_register_client(dev->pdev,
1473                                              i915_switcheroo_set_state,
1474                                              i915_switcheroo_can_switch);
1475         if (ret)
1476                 goto destroy_ringbuffer;
1477
1478         intel_modeset_init(dev);
1479
1480         ret = drm_irq_install(dev);
1481         if (ret)
1482                 goto destroy_ringbuffer;
1483
1484         /* Always safe in the mode setting case. */
1485         /* FIXME: do pre/post-mode set stuff in core KMS code */
1486         dev->vblank_disable_allowed = 1;
1487
1488         /*
1489          * Initialize the hardware status page IRQ location.
1490          */
1491
1492         I915_WRITE(INSTPM, (1 << 5) | (1 << 21));
1493
1494         drm_helper_initial_config(dev);
1495
1496         return 0;
1497
1498 destroy_ringbuffer:
1499         mutex_lock(&dev->struct_mutex);
1500         i915_gem_cleanup_ringbuffer(dev);
1501         mutex_unlock(&dev->struct_mutex);
1502 out:
1503         return ret;
1504 }
1505
1506 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1507 {
1508         struct drm_i915_master_private *master_priv;
1509
1510         master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1511         if (!master_priv)
1512                 return -ENOMEM;
1513
1514         master->driver_priv = master_priv;
1515         return 0;
1516 }
1517
1518 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1519 {
1520         struct drm_i915_master_private *master_priv = master->driver_priv;
1521
1522         if (!master_priv)
1523                 return;
1524
1525         kfree(master_priv);
1526
1527         master->driver_priv = NULL;
1528 }
1529
1530 static void i915_get_mem_freq(struct drm_device *dev)
1531 {
1532         drm_i915_private_t *dev_priv = dev->dev_private;
1533         u32 tmp;
1534
1535         if (!IS_PINEVIEW(dev))
1536                 return;
1537
1538         tmp = I915_READ(CLKCFG);
1539
1540         switch (tmp & CLKCFG_FSB_MASK) {
1541         case CLKCFG_FSB_533:
1542                 dev_priv->fsb_freq = 533; /* 133*4 */
1543                 break;
1544         case CLKCFG_FSB_800:
1545                 dev_priv->fsb_freq = 800; /* 200*4 */
1546                 break;
1547         case CLKCFG_FSB_667:
1548                 dev_priv->fsb_freq =  667; /* 167*4 */
1549                 break;
1550         case CLKCFG_FSB_400:
1551                 dev_priv->fsb_freq = 400; /* 100*4 */
1552                 break;
1553         }
1554
1555         switch (tmp & CLKCFG_MEM_MASK) {
1556         case CLKCFG_MEM_533:
1557                 dev_priv->mem_freq = 533;
1558                 break;
1559         case CLKCFG_MEM_667:
1560                 dev_priv->mem_freq = 667;
1561                 break;
1562         case CLKCFG_MEM_800:
1563                 dev_priv->mem_freq = 800;
1564                 break;
1565         }
1566 }
1567
1568 /**
1569  * i915_driver_load - setup chip and create an initial config
1570  * @dev: DRM device
1571  * @flags: startup flags
1572  *
1573  * The driver load routine has to do several things:
1574  *   - drive output discovery via intel_modeset_init()
1575  *   - initialize the memory manager
1576  *   - allocate initial config memory
1577  *   - setup the DRM framebuffer with the allocated memory
1578  */
1579 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1580 {
1581         struct drm_i915_private *dev_priv = dev->dev_private;
1582         resource_size_t base, size;
1583         int ret = 0, mmio_bar;
1584         uint32_t agp_size, prealloc_size, prealloc_start;
1585
1586         /* i915 has 4 more counters */
1587         dev->counters += 4;
1588         dev->types[6] = _DRM_STAT_IRQ;
1589         dev->types[7] = _DRM_STAT_PRIMARY;
1590         dev->types[8] = _DRM_STAT_SECONDARY;
1591         dev->types[9] = _DRM_STAT_DMA;
1592
1593         dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1594         if (dev_priv == NULL)
1595                 return -ENOMEM;
1596
1597         dev->dev_private = (void *)dev_priv;
1598         dev_priv->dev = dev;
1599         dev_priv->info = (struct intel_device_info *) flags;
1600
1601         /* Add register map (needed for suspend/resume) */
1602         mmio_bar = IS_I9XX(dev) ? 0 : 1;
1603         base = drm_get_resource_start(dev, mmio_bar);
1604         size = drm_get_resource_len(dev, mmio_bar);
1605
1606         if (i915_get_bridge_dev(dev)) {
1607                 ret = -EIO;
1608                 goto free_priv;
1609         }
1610
1611         dev_priv->regs = ioremap(base, size);
1612         if (!dev_priv->regs) {
1613                 DRM_ERROR("failed to map registers\n");
1614                 ret = -EIO;
1615                 goto put_bridge;
1616         }
1617
1618         dev_priv->mm.gtt_mapping =
1619                 io_mapping_create_wc(dev->agp->base,
1620                                      dev->agp->agp_info.aper_size * 1024*1024);
1621         if (dev_priv->mm.gtt_mapping == NULL) {
1622                 ret = -EIO;
1623                 goto out_rmmap;
1624         }
1625
1626         /* Set up a WC MTRR for non-PAT systems.  This is more common than
1627          * one would think, because the kernel disables PAT on first
1628          * generation Core chips because WC PAT gets overridden by a UC
1629          * MTRR if present.  Even if a UC MTRR isn't present.
1630          */
1631         dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1632                                          dev->agp->agp_info.aper_size *
1633                                          1024 * 1024,
1634                                          MTRR_TYPE_WRCOMB, 1);
1635         if (dev_priv->mm.gtt_mtrr < 0) {
1636                 DRM_INFO("MTRR allocation failed.  Graphics "
1637                          "performance may suffer.\n");
1638         }
1639
1640         ret = i915_probe_agp(dev, &agp_size, &prealloc_size, &prealloc_start);
1641         if (ret)
1642                 goto out_iomapfree;
1643
1644         dev_priv->wq = create_singlethread_workqueue("i915");
1645         if (dev_priv->wq == NULL) {
1646                 DRM_ERROR("Failed to create our workqueue.\n");
1647                 ret = -ENOMEM;
1648                 goto out_iomapfree;
1649         }
1650
1651         /* enable GEM by default */
1652         dev_priv->has_gem = 1;
1653
1654         if (prealloc_size > agp_size * 3 / 4) {
1655                 DRM_ERROR("Detected broken video BIOS with %d/%dkB of video "
1656                           "memory stolen.\n",
1657                           prealloc_size / 1024, agp_size / 1024);
1658                 DRM_ERROR("Disabling GEM. (try reducing stolen memory or "
1659                           "updating the BIOS to fix).\n");
1660                 dev_priv->has_gem = 0;
1661         }
1662
1663         dev->driver->get_vblank_counter = i915_get_vblank_counter;
1664         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
1665         if (IS_G4X(dev) || IS_IRONLAKE(dev) || IS_GEN6(dev)) {
1666                 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
1667                 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
1668         }
1669
1670         /* Try to make sure MCHBAR is enabled before poking at it */
1671         intel_setup_mchbar(dev);
1672
1673         i915_gem_load(dev);
1674
1675         /* Init HWS */
1676         if (!I915_NEED_GFX_HWS(dev)) {
1677                 ret = i915_init_phys_hws(dev);
1678                 if (ret != 0)
1679                         goto out_workqueue_free;
1680         }
1681
1682         i915_get_mem_freq(dev);
1683
1684         /* On the 945G/GM, the chipset reports the MSI capability on the
1685          * integrated graphics even though the support isn't actually there
1686          * according to the published specs.  It doesn't appear to function
1687          * correctly in testing on 945G.
1688          * This may be a side effect of MSI having been made available for PEG
1689          * and the registers being closely associated.
1690          *
1691          * According to chipset errata, on the 965GM, MSI interrupts may
1692          * be lost or delayed, but we use them anyways to avoid
1693          * stuck interrupts on some machines.
1694          */
1695         if (!IS_I945G(dev) && !IS_I945GM(dev))
1696                 pci_enable_msi(dev->pdev);
1697
1698         spin_lock_init(&dev_priv->user_irq_lock);
1699         spin_lock_init(&dev_priv->error_lock);
1700         dev_priv->user_irq_refcount = 0;
1701         dev_priv->trace_irq_seqno = 0;
1702
1703         ret = drm_vblank_init(dev, I915_NUM_PIPE);
1704
1705         if (ret) {
1706                 (void) i915_driver_unload(dev);
1707                 return ret;
1708         }
1709
1710         /* Start out suspended */
1711         dev_priv->mm.suspended = 1;
1712
1713         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1714                 ret = i915_load_modeset_init(dev, prealloc_start,
1715                                              prealloc_size, agp_size);
1716                 if (ret < 0) {
1717                         DRM_ERROR("failed to init modeset\n");
1718                         goto out_workqueue_free;
1719                 }
1720         }
1721
1722         /* Must be done after probing outputs */
1723         intel_opregion_init(dev, 0);
1724
1725         setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
1726                     (unsigned long) dev);
1727         return 0;
1728
1729 out_workqueue_free:
1730         destroy_workqueue(dev_priv->wq);
1731 out_iomapfree:
1732         io_mapping_free(dev_priv->mm.gtt_mapping);
1733 out_rmmap:
1734         iounmap(dev_priv->regs);
1735 put_bridge:
1736         pci_dev_put(dev_priv->bridge_dev);
1737 free_priv:
1738         kfree(dev_priv);
1739         return ret;
1740 }
1741
1742 int i915_driver_unload(struct drm_device *dev)
1743 {
1744         struct drm_i915_private *dev_priv = dev->dev_private;
1745
1746         i915_destroy_error_state(dev);
1747
1748         destroy_workqueue(dev_priv->wq);
1749         del_timer_sync(&dev_priv->hangcheck_timer);
1750
1751         io_mapping_free(dev_priv->mm.gtt_mapping);
1752         if (dev_priv->mm.gtt_mtrr >= 0) {
1753                 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
1754                          dev->agp->agp_info.aper_size * 1024 * 1024);
1755                 dev_priv->mm.gtt_mtrr = -1;
1756         }
1757
1758         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1759                 /*
1760                  * free the memory space allocated for the child device
1761                  * config parsed from VBT
1762                  */
1763                 if (dev_priv->child_dev && dev_priv->child_dev_num) {
1764                         kfree(dev_priv->child_dev);
1765                         dev_priv->child_dev = NULL;
1766                         dev_priv->child_dev_num = 0;
1767                 }
1768                 drm_irq_uninstall(dev);
1769                 vga_switcheroo_unregister_client(dev->pdev);
1770                 vga_client_register(dev->pdev, NULL, NULL, NULL);
1771         }
1772
1773         if (dev->pdev->msi_enabled)
1774                 pci_disable_msi(dev->pdev);
1775
1776         if (dev_priv->regs != NULL)
1777                 iounmap(dev_priv->regs);
1778
1779         intel_opregion_free(dev, 0);
1780
1781         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1782                 intel_modeset_cleanup(dev);
1783
1784                 i915_gem_free_all_phys_object(dev);
1785
1786                 mutex_lock(&dev->struct_mutex);
1787                 i915_gem_cleanup_ringbuffer(dev);
1788                 mutex_unlock(&dev->struct_mutex);
1789                 drm_mm_takedown(&dev_priv->vram);
1790                 i915_gem_lastclose(dev);
1791
1792                 intel_cleanup_overlay(dev);
1793         }
1794
1795         intel_teardown_mchbar(dev);
1796
1797         pci_dev_put(dev_priv->bridge_dev);
1798         kfree(dev->dev_private);
1799
1800         return 0;
1801 }
1802
1803 int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv)
1804 {
1805         struct drm_i915_file_private *i915_file_priv;
1806
1807         DRM_DEBUG_DRIVER("\n");
1808         i915_file_priv = (struct drm_i915_file_private *)
1809             kmalloc(sizeof(*i915_file_priv), GFP_KERNEL);
1810
1811         if (!i915_file_priv)
1812                 return -ENOMEM;
1813
1814         file_priv->driver_priv = i915_file_priv;
1815
1816         INIT_LIST_HEAD(&i915_file_priv->mm.request_list);
1817
1818         return 0;
1819 }
1820
1821 /**
1822  * i915_driver_lastclose - clean up after all DRM clients have exited
1823  * @dev: DRM device
1824  *
1825  * Take care of cleaning up after all DRM clients have exited.  In the
1826  * mode setting case, we want to restore the kernel's initial mode (just
1827  * in case the last client left us in a bad state).
1828  *
1829  * Additionally, in the non-mode setting case, we'll tear down the AGP
1830  * and DMA structures, since the kernel won't be using them, and clea
1831  * up any GEM state.
1832  */
1833 void i915_driver_lastclose(struct drm_device * dev)
1834 {
1835         drm_i915_private_t *dev_priv = dev->dev_private;
1836
1837         if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
1838                 drm_fb_helper_restore();
1839                 vga_switcheroo_process_delayed_switch();
1840                 return;
1841         }
1842
1843         i915_gem_lastclose(dev);
1844
1845         if (dev_priv->agp_heap)
1846                 i915_mem_takedown(&(dev_priv->agp_heap));
1847
1848         i915_dma_cleanup(dev);
1849 }
1850
1851 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
1852 {
1853         drm_i915_private_t *dev_priv = dev->dev_private;
1854         i915_gem_release(dev, file_priv);
1855         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1856                 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
1857 }
1858
1859 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file_priv)
1860 {
1861         struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv;
1862
1863         kfree(i915_file_priv);
1864 }
1865
1866 struct drm_ioctl_desc i915_ioctls[] = {
1867         DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1868         DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
1869         DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH),
1870         DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
1871         DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
1872         DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
1873         DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH),
1874         DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1875         DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH),
1876         DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH),
1877         DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1878         DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
1879         DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
1880         DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
1881         DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH ),
1882         DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
1883         DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1884         DRM_IOCTL_DEF(DRM_I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1885         DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH),
1886         DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH),
1887         DRM_IOCTL_DEF(DRM_I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
1888         DRM_IOCTL_DEF(DRM_I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
1889         DRM_IOCTL_DEF(DRM_I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH),
1890         DRM_IOCTL_DEF(DRM_I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH),
1891         DRM_IOCTL_DEF(DRM_I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1892         DRM_IOCTL_DEF(DRM_I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1893         DRM_IOCTL_DEF(DRM_I915_GEM_CREATE, i915_gem_create_ioctl, 0),
1894         DRM_IOCTL_DEF(DRM_I915_GEM_PREAD, i915_gem_pread_ioctl, 0),
1895         DRM_IOCTL_DEF(DRM_I915_GEM_PWRITE, i915_gem_pwrite_ioctl, 0),
1896         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP, i915_gem_mmap_ioctl, 0),
1897         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, 0),
1898         DRM_IOCTL_DEF(DRM_I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, 0),
1899         DRM_IOCTL_DEF(DRM_I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, 0),
1900         DRM_IOCTL_DEF(DRM_I915_GEM_SET_TILING, i915_gem_set_tiling, 0),
1901         DRM_IOCTL_DEF(DRM_I915_GEM_GET_TILING, i915_gem_get_tiling, 0),
1902         DRM_IOCTL_DEF(DRM_I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, 0),
1903         DRM_IOCTL_DEF(DRM_I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, 0),
1904         DRM_IOCTL_DEF(DRM_I915_GEM_MADVISE, i915_gem_madvise_ioctl, 0),
1905         DRM_IOCTL_DEF(DRM_I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW),
1906         DRM_IOCTL_DEF(DRM_I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW),
1907 };
1908
1909 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
1910
1911 /**
1912  * Determine if the device really is AGP or not.
1913  *
1914  * All Intel graphics chipsets are treated as AGP, even if they are really
1915  * PCI-e.
1916  *
1917  * \param dev   The device to be tested.
1918  *
1919  * \returns
1920  * A value of 1 is always retured to indictate every i9x5 is AGP.
1921  */
1922 int i915_driver_device_is_agp(struct drm_device * dev)
1923 {
1924         return 1;
1925 }