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 #include <linux/slab.h>
  42
  43 /* Really want an OS-independent resettable timer.  Would like to have
  44  * this loop run for (eg) 3 sec, but have the timer reset every time
  45  * the head pointer changes, so that EBUSY only happens if the ring
  46  * actually stalls for (eg) 3 seconds.
  47  */
  48 int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
  49 {
  50         drm_i915_private_t *dev_priv = dev->dev_private;
  51         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
  52         u32 acthd_reg = IS_I965G(dev) ? ACTHD_I965 : ACTHD;
  53         u32 last_acthd = I915_READ(acthd_reg);
  54         u32 acthd;
  55         u32 last_head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
  56         int i;
  57
  58         trace_i915_ring_wait_begin (dev);
  59
  60         for (i = 0; i < 100000; i++) {
  61                 ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
  62                 acthd = I915_READ(acthd_reg);
  63                 ring->space = ring->head - (ring->tail + 8);
  64                 if (ring->space < 0)
  65                         ring->space += ring->Size;
  66                 if (ring->space >= n) {
  67                         trace_i915_ring_wait_end (dev);
  68                         return 0;
  69                 }
  70
  71                 if (dev->primary->master) {
  72                         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
  73                         if (master_priv->sarea_priv)
  74                                 master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
  75                 }
  76
  77
  78                 if (ring->head != last_head)
  79                         i = 0;
  80                 if (acthd != last_acthd)
  81                         i = 0;
  82
  83                 last_head = ring->head;
  84                 last_acthd = acthd;
  85                 msleep_interruptible(10);
  86
  87         }
  88
  89         trace_i915_ring_wait_end (dev);
  90         return -EBUSY;
  91 }
  92
  93 /* As a ringbuffer is only allowed to wrap between instructions, fill
  94  * the tail with NOOPs.
  95  */
  96 int i915_wrap_ring(struct drm_device *dev)
  97 {
  98         drm_i915_private_t *dev_priv = dev->dev_private;
  99         volatile unsigned int *virt;
 100         int rem;
 101
 102         rem = dev_priv->ring.Size - dev_priv->ring.tail;
 103         if (dev_priv->ring.space < rem) {
 104                 int ret = i915_wait_ring(dev, rem, __func__);
 105                 if (ret)
 106                         return ret;
 107         }
 108         dev_priv->ring.space -= rem;
 109
 110         virt = (unsigned int *)
 111                 (dev_priv->ring.virtual_start + dev_priv->ring.tail);
 112         rem /= 4;
 113         while (rem--)
 114                 *virt++ = MI_NOOP;
 115
 116         dev_priv->ring.tail = 0;
 117
 118         return 0;
 119 }
 120
 121 /**
 122  * Sets up the hardware status page for devices that need a physical address
 123  * in the register.
 124  */
 125 static int i915_init_phys_hws(struct drm_device *dev)
 126 {
 127         drm_i915_private_t *dev_priv = dev->dev_private;
 128         /* Program Hardware Status Page */
 129         dev_priv->status_page_dmah =
 130                 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE);
 131
 132         if (!dev_priv->status_page_dmah) {
 133                 DRM_ERROR("Can not allocate hardware status page\n");
 134                 return -ENOMEM;
 135         }
 136         dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
 137         dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
 138
 139         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 140
 141         if (IS_I965G(dev))
 142                 dev_priv->dma_status_page |= (dev_priv->dma_status_page >> 28) &
 143                                              0xf0;
 144
 145         I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 146         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 147         return 0;
 148 }
 149
 150 /**
 151  * Frees the hardware status page, whether it's a physical address or a virtual
 152  * address set up by the X Server.
 153  */
 154 static void i915_free_hws(struct drm_device *dev)
 155 {
 156         drm_i915_private_t *dev_priv = dev->dev_private;
 157         if (dev_priv->status_page_dmah) {
 158                 drm_pci_free(dev, dev_priv->status_page_dmah);
 159                 dev_priv->status_page_dmah = NULL;
 160         }
 161
 162         if (dev_priv->status_gfx_addr) {
 163                 dev_priv->status_gfx_addr = 0;
 164                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
 165         }
 166
 167         /* Need to rewrite hardware status page */
 168         I915_WRITE(HWS_PGA, 0x1ffff000);
 169 }
 170
 171 void i915_kernel_lost_context(struct drm_device * dev)
 172 {
 173         drm_i915_private_t *dev_priv = dev->dev_private;
 174         struct drm_i915_master_private *master_priv;
 175         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
 176
 177         /*
 178          * We should never lose context on the ring with modesetting
 179          * as we don't expose it to userspace
 180          */
 181         if (drm_core_check_feature(dev, DRIVER_MODESET))
 182                 return;
 183
 184         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 185         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 186         ring->space = ring->head - (ring->tail + 8);
 187         if (ring->space < 0)
 188                 ring->space += ring->Size;
 189
 190         if (!dev->primary->master)
 191                 return;
 192
 193         master_priv = dev->primary->master->driver_priv;
 194         if (ring->head == ring->tail && master_priv->sarea_priv)
 195                 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 196 }
 197
 198 static int i915_dma_cleanup(struct drm_device * dev)
 199 {
 200         drm_i915_private_t *dev_priv = dev->dev_private;
 201         /* Make sure interrupts are disabled here because the uninstall ioctl
 202          * may not have been called from userspace and after dev_private
 203          * is freed, it's too late.
 204          */
 205         if (dev->irq_enabled)
 206                 drm_irq_uninstall(dev);
 207
 208         if (dev_priv->ring.virtual_start) {
 209                 drm_core_ioremapfree(&dev_priv->ring.map, dev);
 210                 dev_priv->ring.virtual_start = NULL;
 211                 dev_priv->ring.map.handle = NULL;
 212                 dev_priv->ring.map.size = 0;
 213         }
 214
 215         /* Clear the HWS virtual address at teardown */
 216         if (I915_NEED_GFX_HWS(dev))
 217                 i915_free_hws(dev);
 218
 219         return 0;
 220 }
 221
 222 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 223 {
 224         drm_i915_private_t *dev_priv = dev->dev_private;
 225         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 226
 227         master_priv->sarea = drm_getsarea(dev);
 228         if (master_priv->sarea) {
 229                 master_priv->sarea_priv = (drm_i915_sarea_t *)
 230                         ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
 231         } else {
 232                 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
 233         }
 234
 235         if (init->ring_size != 0) {
 236                 if (dev_priv->ring.ring_obj != NULL) {
 237                         i915_dma_cleanup(dev);
 238                         DRM_ERROR("Client tried to initialize ringbuffer in "
 239                                   "GEM mode\n");
 240                         return -EINVAL;
 241                 }
 242
 243                 dev_priv->ring.Size = init->ring_size;
 244
 245                 dev_priv->ring.map.offset = init->ring_start;
 246                 dev_priv->ring.map.size = init->ring_size;
 247                 dev_priv->ring.map.type = 0;
 248                 dev_priv->ring.map.flags = 0;
 249                 dev_priv->ring.map.mtrr = 0;
 250
 251                 drm_core_ioremap_wc(&dev_priv->ring.map, dev);
 252
 253                 if (dev_priv->ring.map.handle == NULL) {
 254                         i915_dma_cleanup(dev);
 255                         DRM_ERROR("can not ioremap virtual address for"
 256                                   " ring buffer\n");
 257                         return -ENOMEM;
 258                 }
 259         }
 260
 261         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 262
 263         dev_priv->cpp = init->cpp;
 264         dev_priv->back_offset = init->back_offset;
 265         dev_priv->front_offset = init->front_offset;
 266         dev_priv->current_page = 0;
 267         if (master_priv->sarea_priv)
 268                 master_priv->sarea_priv->pf_current_page = 0;
 269
 270         /* Allow hardware batchbuffers unless told otherwise.
 271          */
 272         dev_priv->allow_batchbuffer = 1;
 273
 274         return 0;
 275 }
 276
 277 static int i915_dma_resume(struct drm_device * dev)
 278 {
 279         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 280
 281         DRM_DEBUG_DRIVER("%s\n", __func__);
 282
 283         if (dev_priv->ring.map.handle == NULL) {
 284                 DRM_ERROR("can not ioremap virtual address for"
 285                           " ring buffer\n");
 286                 return -ENOMEM;
 287         }
 288
 289         /* Program Hardware Status Page */
 290         if (!dev_priv->hw_status_page) {
 291                 DRM_ERROR("Can not find hardware status page\n");
 292                 return -EINVAL;
 293         }
 294         DRM_DEBUG_DRIVER("hw status page @ %p\n",
 295                                 dev_priv->hw_status_page);
 296
 297         if (dev_priv->status_gfx_addr != 0)
 298                 I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 299         else
 300                 I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 301         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 302
 303         return 0;
 304 }
 305
 306 static int i915_dma_init(struct drm_device *dev, void *data,
 307                          struct drm_file *file_priv)
 308 {
 309         drm_i915_init_t *init = data;
 310         int retcode = 0;
 311
 312         switch (init->func) {
 313         case I915_INIT_DMA:
 314                 retcode = i915_initialize(dev, init);
 315                 break;
 316         case I915_CLEANUP_DMA:
 317                 retcode = i915_dma_cleanup(dev);
 318                 break;
 319         case I915_RESUME_DMA:
 320                 retcode = i915_dma_resume(dev);
 321                 break;
 322         default:
 323                 retcode = -EINVAL;
 324                 break;
 325         }
 326
 327         return retcode;
 328 }
 329
 330 /* Implement basically the same security restrictions as hardware does
 331  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 332  *
 333  * Most of the calculations below involve calculating the size of a
 334  * particular instruction.  It's important to get the size right as
 335  * that tells us where the next instruction to check is.  Any illegal
 336  * instruction detected will be given a size of zero, which is a
 337  * signal to abort the rest of the buffer.
 338  */
 339 static int do_validate_cmd(int cmd)
 340 {
 341         switch (((cmd >> 29) & 0x7)) {
 342         case 0x0:
 343                 switch ((cmd >> 23) & 0x3f) {
 344                 case 0x0:
 345                         return 1;       /* MI_NOOP */
 346                 case 0x4:
 347                         return 1;       /* MI_FLUSH */
 348                 default:
 349                         return 0;       /* disallow everything else */
 350                 }
 351                 break;
 352         case 0x1:
 353                 return 0;       /* reserved */
 354         case 0x2:
 355                 return (cmd & 0xff) + 2;        /* 2d commands */
 356         case 0x3:
 357                 if (((cmd >> 24) & 0x1f) <= 0x18)
 358                         return 1;
 359
 360                 switch ((cmd >> 24) & 0x1f) {
 361                 case 0x1c:
 362                         return 1;
 363                 case 0x1d:
 364                         switch ((cmd >> 16) & 0xff) {
 365                         case 0x3:
 366                                 return (cmd & 0x1f) + 2;
 367                         case 0x4:
 368                                 return (cmd & 0xf) + 2;
 369                         default:
 370                                 return (cmd & 0xffff) + 2;
 371                         }
 372                 case 0x1e:
 373                         if (cmd & (1 << 23))
 374                                 return (cmd & 0xffff) + 1;
 375                         else
 376                                 return 1;
 377                 case 0x1f:
 378                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 379                                 return (cmd & 0x1ffff) + 2;
 380                         else if (cmd & (1 << 17))       /* indirect random */
 381                                 if ((cmd & 0xffff) == 0)
 382                                         return 0;       /* unknown length, too hard */
 383                                 else
 384                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 385                         else
 386                                 return 2;       /* indirect sequential */
 387                 default:
 388                         return 0;
 389                 }
 390         default:
 391                 return 0;
 392         }
 393
 394         return 0;
 395 }
 396
 397 static int validate_cmd(int cmd)
 398 {
 399         int ret = do_validate_cmd(cmd);
 400
 401 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 402
 403         return ret;
 404 }
 405
 406 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
 407 {
 408         drm_i915_private_t *dev_priv = dev->dev_private;
 409         int i;
 410         RING_LOCALS;
 411
 412         if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
 413                 return -EINVAL;
 414
 415         BEGIN_LP_RING((dwords+1)&~1);
 416
 417         for (i = 0; i < dwords;) {
 418                 int cmd, sz;
 419
 420                 cmd = buffer[i];
 421
 422                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 423                         return -EINVAL;
 424
 425                 OUT_RING(cmd);
 426
 427                 while (++i, --sz) {
 428                         OUT_RING(buffer[i]);
 429                 }
 430         }
 431
 432         if (dwords & 1)
 433                 OUT_RING(0);
 434
 435         ADVANCE_LP_RING();
 436
 437         return 0;
 438 }
 439
 440 int
 441 i915_emit_box(struct drm_device *dev,
 442               struct drm_clip_rect *boxes,
 443               int i, int DR1, int DR4)
 444 {
 445         drm_i915_private_t *dev_priv = dev->dev_private;
 446         struct drm_clip_rect box = boxes[i];
 447         RING_LOCALS;
 448
 449         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 450                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 451                           box.x1, box.y1, box.x2, box.y2);
 452                 return -EINVAL;
 453         }
 454
 455         if (IS_I965G(dev)) {
 456                 BEGIN_LP_RING(4);
 457                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 458                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 459                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 460                 OUT_RING(DR4);
 461                 ADVANCE_LP_RING();
 462         } else {
 463                 BEGIN_LP_RING(6);
 464                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 465                 OUT_RING(DR1);
 466                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 467                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 468                 OUT_RING(DR4);
 469                 OUT_RING(0);
 470                 ADVANCE_LP_RING();
 471         }
 472
 473         return 0;
 474 }
 475
 476 /* XXX: Emitting the counter should really be moved to part of the IRQ
 477  * emit. For now, do it in both places:
 478  */
 479
 480 static void i915_emit_breadcrumb(struct drm_device *dev)
 481 {
 482         drm_i915_private_t *dev_priv = dev->dev_private;
 483         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 484         RING_LOCALS;
 485
 486         dev_priv->counter++;
 487         if (dev_priv->counter > 0x7FFFFFFFUL)
 488                 dev_priv->counter = 0;
 489         if (master_priv->sarea_priv)
 490                 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
 491
 492         BEGIN_LP_RING(4);
 493         OUT_RING(MI_STORE_DWORD_INDEX);
 494         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 495         OUT_RING(dev_priv->counter);
 496         OUT_RING(0);
 497         ADVANCE_LP_RING();
 498 }
 499
 500 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 501                                    drm_i915_cmdbuffer_t *cmd,
 502                                    struct drm_clip_rect *cliprects,
 503                                    void *cmdbuf)
 504 {
 505         int nbox = cmd->num_cliprects;
 506         int i = 0, count, ret;
 507
 508         if (cmd->sz & 0x3) {
 509                 DRM_ERROR("alignment");
 510                 return -EINVAL;
 511         }
 512
 513         i915_kernel_lost_context(dev);
 514
 515         count = nbox ? nbox : 1;
 516
 517         for (i = 0; i < count; i++) {
 518                 if (i < nbox) {
 519                         ret = i915_emit_box(dev, cliprects, i,
 520                                             cmd->DR1, cmd->DR4);
 521                         if (ret)
 522                                 return ret;
 523                 }
 524
 525                 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
 526                 if (ret)
 527                         return ret;
 528         }
 529
 530         i915_emit_breadcrumb(dev);
 531         return 0;
 532 }
 533
 534 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 535                                      drm_i915_batchbuffer_t * batch,
 536                                      struct drm_clip_rect *cliprects)
 537 {
 538         drm_i915_private_t *dev_priv = dev->dev_private;
 539         int nbox = batch->num_cliprects;
 540         int i = 0, count;
 541         RING_LOCALS;
 542
 543         if ((batch->start | batch->used) & 0x7) {
 544                 DRM_ERROR("alignment");
 545                 return -EINVAL;
 546         }
 547
 548         i915_kernel_lost_context(dev);
 549
 550         count = nbox ? nbox : 1;
 551
 552         for (i = 0; i < count; i++) {
 553                 if (i < nbox) {
 554                         int ret = i915_emit_box(dev, cliprects, i,
 555                                                 batch->DR1, batch->DR4);
 556                         if (ret)
 557                                 return ret;
 558                 }
 559
 560                 if (!IS_I830(dev) && !IS_845G(dev)) {
 561                         BEGIN_LP_RING(2);
 562                         if (IS_I965G(dev)) {
 563                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 564                                 OUT_RING(batch->start);
 565                         } else {
 566                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 567                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 568                         }
 569                         ADVANCE_LP_RING();
 570                 } else {
 571                         BEGIN_LP_RING(4);
 572                         OUT_RING(MI_BATCH_BUFFER);
 573                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 574                         OUT_RING(batch->start + batch->used - 4);
 575                         OUT_RING(0);
 576                         ADVANCE_LP_RING();
 577                 }
 578         }
 579
 580         i915_emit_breadcrumb(dev);
 581
 582         return 0;
 583 }
 584
 585 static int i915_dispatch_flip(struct drm_device * dev)
 586 {
 587         drm_i915_private_t *dev_priv = dev->dev_private;
 588         struct drm_i915_master_private *master_priv =
 589                 dev->primary->master->driver_priv;
 590         RING_LOCALS;
 591
 592         if (!master_priv->sarea_priv)
 593                 return -EINVAL;
 594
 595         DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
 596                           __func__,
 597                          dev_priv->current_page,
 598                          master_priv->sarea_priv->pf_current_page);
 599
 600         i915_kernel_lost_context(dev);
 601
 602         BEGIN_LP_RING(2);
 603         OUT_RING(MI_FLUSH | MI_READ_FLUSH);
 604         OUT_RING(0);
 605         ADVANCE_LP_RING();
 606
 607         BEGIN_LP_RING(6);
 608         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 609         OUT_RING(0);
 610         if (dev_priv->current_page == 0) {
 611                 OUT_RING(dev_priv->back_offset);
 612                 dev_priv->current_page = 1;
 613         } else {
 614                 OUT_RING(dev_priv->front_offset);
 615                 dev_priv->current_page = 0;
 616         }
 617         OUT_RING(0);
 618         ADVANCE_LP_RING();
 619
 620         BEGIN_LP_RING(2);
 621         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 622         OUT_RING(0);
 623         ADVANCE_LP_RING();
 624
 625         master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 626
 627         BEGIN_LP_RING(4);
 628         OUT_RING(MI_STORE_DWORD_INDEX);
 629         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 630         OUT_RING(dev_priv->counter);
 631         OUT_RING(0);
 632         ADVANCE_LP_RING();
 633
 634         master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 635         return 0;
 636 }
 637
 638 static int i915_quiescent(struct drm_device * dev)
 639 {
 640         drm_i915_private_t *dev_priv = dev->dev_private;
 641
 642         i915_kernel_lost_context(dev);
 643         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __func__);
 644 }
 645
 646 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 647                             struct drm_file *file_priv)
 648 {
 649         int ret;
 650
 651         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 652
 653         mutex_lock(&dev->struct_mutex);
 654         ret = i915_quiescent(dev);
 655         mutex_unlock(&dev->struct_mutex);
 656
 657         return ret;
 658 }
 659
 660 static int i915_batchbuffer(struct drm_device *dev, void *data,
 661                             struct drm_file *file_priv)
 662 {
 663         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 664         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 665         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 666             master_priv->sarea_priv;
 667         drm_i915_batchbuffer_t *batch = data;
 668         int ret;
 669         struct drm_clip_rect *cliprects = NULL;
 670
 671         if (!dev_priv->allow_batchbuffer) {
 672                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 673                 return -EINVAL;
 674         }
 675
 676         DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
 677                         batch->start, batch->used, batch->num_cliprects);
 678
 679         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 680
 681         if (batch->num_cliprects < 0)
 682                 return -EINVAL;
 683
 684         if (batch->num_cliprects) {
 685                 cliprects = kcalloc(batch->num_cliprects,
 686                                     sizeof(struct drm_clip_rect),
 687                                     GFP_KERNEL);
 688                 if (cliprects == NULL)
 689                         return -ENOMEM;
 690
 691                 ret = copy_from_user(cliprects, batch->cliprects,
 692                                      batch->num_cliprects *
 693                                      sizeof(struct drm_clip_rect));
 694                 if (ret != 0)
 695                         goto fail_free;
 696         }
 697
 698         mutex_lock(&dev->struct_mutex);
 699         ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
 700         mutex_unlock(&dev->struct_mutex);
 701
 702         if (sarea_priv)
 703                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 704
 705 fail_free:
 706         kfree(cliprects);
 707
 708         return ret;
 709 }
 710
 711 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 712                           struct drm_file *file_priv)
 713 {
 714         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 715         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 716         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 717             master_priv->sarea_priv;
 718         drm_i915_cmdbuffer_t *cmdbuf = data;
 719         struct drm_clip_rect *cliprects = NULL;
 720         void *batch_data;
 721         int ret;
 722
 723         DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 724                         cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 725
 726         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 727
 728         if (cmdbuf->num_cliprects < 0)
 729                 return -EINVAL;
 730
 731         batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
 732         if (batch_data == NULL)
 733                 return -ENOMEM;
 734
 735         ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
 736         if (ret != 0)
 737                 goto fail_batch_free;
 738
 739         if (cmdbuf->num_cliprects) {
 740                 cliprects = kcalloc(cmdbuf->num_cliprects,
 741                                     sizeof(struct drm_clip_rect), GFP_KERNEL);
 742                 if (cliprects == NULL) {
 743                         ret = -ENOMEM;
 744                         goto fail_batch_free;
 745                 }
 746
 747                 ret = copy_from_user(cliprects, cmdbuf->cliprects,
 748                                      cmdbuf->num_cliprects *
 749                                      sizeof(struct drm_clip_rect));
 750                 if (ret != 0)
 751                         goto fail_clip_free;
 752         }
 753
 754         mutex_lock(&dev->struct_mutex);
 755         ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
 756         mutex_unlock(&dev->struct_mutex);
 757         if (ret) {
 758                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 759                 goto fail_clip_free;
 760         }
 761
 762         if (sarea_priv)
 763                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 764
 765 fail_clip_free:
 766         kfree(cliprects);
 767 fail_batch_free:
 768         kfree(batch_data);
 769
 770         return ret;
 771 }
 772
 773 static int i915_flip_bufs(struct drm_device *dev, void *data,
 774                           struct drm_file *file_priv)
 775 {
 776         int ret;
 777
 778         DRM_DEBUG_DRIVER("%s\n", __func__);
 779
 780         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 781
 782         mutex_lock(&dev->struct_mutex);
 783         ret = i915_dispatch_flip(dev);
 784         mutex_unlock(&dev->struct_mutex);
 785
 786         return ret;
 787 }
 788
 789 static int i915_getparam(struct drm_device *dev, void *data,
 790                          struct drm_file *file_priv)
 791 {
 792         drm_i915_private_t *dev_priv = dev->dev_private;
 793         drm_i915_getparam_t *param = data;
 794         int value;
 795
 796         if (!dev_priv) {
 797                 DRM_ERROR("called with no initialization\n");
 798                 return -EINVAL;
 799         }
 800
 801         switch (param->param) {
 802         case I915_PARAM_IRQ_ACTIVE:
 803                 value = dev->pdev->irq ? 1 : 0;
 804                 break;
 805         case I915_PARAM_ALLOW_BATCHBUFFER:
 806                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 807                 break;
 808         case I915_PARAM_LAST_DISPATCH:
 809                 value = READ_BREADCRUMB(dev_priv);
 810                 break;
 811         case I915_PARAM_CHIPSET_ID:
 812                 value = dev->pci_device;
 813                 break;
 814         case I915_PARAM_HAS_GEM:
 815                 value = dev_priv->has_gem;
 816                 break;
 817         case I915_PARAM_NUM_FENCES_AVAIL:
 818                 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
 819                 break;
 820         case I915_PARAM_HAS_OVERLAY:
 821                 value = dev_priv->overlay ? 1 : 0;
 822                 break;
 823         case I915_PARAM_HAS_PAGEFLIPPING:
 824                 value = 1;
 825                 break;
 826         case I915_PARAM_HAS_EXECBUF2:
 827                 /* depends on GEM */
 828                 value = dev_priv->has_gem;
 829                 break;
 830         default:
 831                 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
 832                                  param->param);
 833                 return -EINVAL;
 834         }
 835
 836         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
 837                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 838                 return -EFAULT;
 839         }
 840
 841         return 0;
 842 }
 843
 844 static int i915_setparam(struct drm_device *dev, void *data,
 845                          struct drm_file *file_priv)
 846 {
 847         drm_i915_private_t *dev_priv = dev->dev_private;
 848         drm_i915_setparam_t *param = data;
 849
 850         if (!dev_priv) {
 851                 DRM_ERROR("called with no initialization\n");
 852                 return -EINVAL;
 853         }
 854
 855         switch (param->param) {
 856         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 857                 break;
 858         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 859                 dev_priv->tex_lru_log_granularity = param->value;
 860                 break;
 861         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 862                 dev_priv->allow_batchbuffer = param->value;
 863                 break;
 864         case I915_SETPARAM_NUM_USED_FENCES:
 865                 if (param->value > dev_priv->num_fence_regs ||
 866                     param->value < 0)
 867                         return -EINVAL;
 868                 /* Userspace can use first N regs */
 869                 dev_priv->fence_reg_start = param->value;
 870                 break;
 871         default:
 872                 DRM_DEBUG_DRIVER("unknown parameter %d\n",
 873                                         param->param);
 874                 return -EINVAL;
 875         }
 876
 877         return 0;
 878 }
 879
 880 static int i915_set_status_page(struct drm_device *dev, void *data,
 881                                 struct drm_file *file_priv)
 882 {
 883         drm_i915_private_t *dev_priv = dev->dev_private;
 884         drm_i915_hws_addr_t *hws = data;
 885
 886         if (!I915_NEED_GFX_HWS(dev))
 887                 return -EINVAL;
 888
 889         if (!dev_priv) {
 890                 DRM_ERROR("called with no initialization\n");
 891                 return -EINVAL;
 892         }
 893
 894         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 895                 WARN(1, "tried to set status page when mode setting active\n");
 896                 return 0;
 897         }
 898
 899         DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
 900
 901         dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
 902
 903         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 904         dev_priv->hws_map.size = 4*1024;
 905         dev_priv->hws_map.type = 0;
 906         dev_priv->hws_map.flags = 0;
 907         dev_priv->hws_map.mtrr = 0;
 908
 909         drm_core_ioremap_wc(&dev_priv->hws_map, dev);
 910         if (dev_priv->hws_map.handle == NULL) {
 911                 i915_dma_cleanup(dev);
 912                 dev_priv->status_gfx_addr = 0;
 913                 DRM_ERROR("can not ioremap virtual address for"
 914                                 " G33 hw status page\n");
 915                 return -ENOMEM;
 916         }
 917         dev_priv->hw_status_page = dev_priv->hws_map.handle;
 918
 919         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 920         I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 921         DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
 922                                 dev_priv->status_gfx_addr);
 923         DRM_DEBUG_DRIVER("load hws at %p\n",
 924                                 dev_priv->hw_status_page);
 925         return 0;
 926 }
 927
 928 static int i915_get_bridge_dev(struct drm_device *dev)
 929 {
 930         struct drm_i915_private *dev_priv = dev->dev_private;
 931
 932         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 933         if (!dev_priv->bridge_dev) {
 934                 DRM_ERROR("bridge device not found\n");
 935                 return -1;
 936         }
 937         return 0;
 938 }
 939
 940 #define MCHBAR_I915 0x44
 941 #define MCHBAR_I965 0x48
 942 #define MCHBAR_SIZE (4*4096)
 943
 944 #define DEVEN_REG 0x54
 945 #define   DEVEN_MCHBAR_EN (1 << 28)
 946
 947 /* Allocate space for the MCH regs if needed, return nonzero on error */
 948 static int
 949 intel_alloc_mchbar_resource(struct drm_device *dev)
 950 {
 951         drm_i915_private_t *dev_priv = dev->dev_private;
 952         int reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915;
 953         u32 temp_lo, temp_hi = 0;
 954         u64 mchbar_addr;
 955         int ret = 0;
 956
 957         if (IS_I965G(dev))
 958                 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
 959         pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
 960         mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
 961
 962         /* If ACPI doesn't have it, assume we need to allocate it ourselves */
 963 #ifdef CONFIG_PNP
 964         if (mchbar_addr &&
 965             pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE)) {
 966                 ret = 0;
 967                 goto out;
 968         }
 969 #endif
 970
 971         /* Get some space for it */
 972         ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus, &dev_priv->mch_res,
 973                                      MCHBAR_SIZE, MCHBAR_SIZE,
 974                                      PCIBIOS_MIN_MEM,
 975                                      0,   pcibios_align_resource,
 976                                      dev_priv->bridge_dev);
 977         if (ret) {
 978                 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
 979                 dev_priv->mch_res.start = 0;
 980                 goto out;
 981         }
 982
 983         if (IS_I965G(dev))
 984                 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
 985                                        upper_32_bits(dev_priv->mch_res.start));
 986
 987         pci_write_config_dword(dev_priv->bridge_dev, reg,
 988                                lower_32_bits(dev_priv->mch_res.start));
 989 out:
 990         return ret;
 991 }
 992
 993 /* Setup MCHBAR if possible, return true if we should disable it again */
 994 static void
 995 intel_setup_mchbar(struct drm_device *dev)
 996 {
 997         drm_i915_private_t *dev_priv = dev->dev_private;
 998         int mchbar_reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915;
 999         u32 temp;
1000         bool enabled;
1001
1002         dev_priv->mchbar_need_disable = false;
1003
1004         if (IS_I915G(dev) || IS_I915GM(dev)) {
1005                 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
1006                 enabled = !!(temp & DEVEN_MCHBAR_EN);
1007         } else {
1008                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1009                 enabled = temp & 1;
1010         }
1011
1012         /* If it's already enabled, don't have to do anything */
1013         if (enabled)
1014                 return;
1015
1016         if (intel_alloc_mchbar_resource(dev))
1017                 return;
1018
1019         dev_priv->mchbar_need_disable = true;
1020
1021         /* Space is allocated or reserved, so enable it. */
1022         if (IS_I915G(dev) || IS_I915GM(dev)) {
1023                 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
1024                                        temp | DEVEN_MCHBAR_EN);
1025         } else {
1026                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1027                 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
1028         }
1029 }
1030
1031 static void
1032 intel_teardown_mchbar(struct drm_device *dev)
1033 {
1034         drm_i915_private_t *dev_priv = dev->dev_private;
1035         int mchbar_reg = IS_I965G(dev) ? MCHBAR_I965 : MCHBAR_I915;
1036         u32 temp;
1037
1038         if (dev_priv->mchbar_need_disable) {
1039                 if (IS_I915G(dev) || IS_I915GM(dev)) {
1040                         pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
1041                         temp &= ~DEVEN_MCHBAR_EN;
1042                         pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
1043                 } else {
1044                         pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1045                         temp &= ~1;
1046                         pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
1047                 }
1048         }
1049
1050         if (dev_priv->mch_res.start)
1051                 release_resource(&dev_priv->mch_res);
1052 }
1053
1054 /**
1055  * i915_probe_agp - get AGP bootup configuration
1056  * @pdev: PCI device
1057  * @aperture_size: returns AGP aperture configured size
1058  * @preallocated_size: returns size of BIOS preallocated AGP space
1059  *
1060  * Since Intel integrated graphics are UMA, the BIOS has to set aside
1061  * some RAM for the framebuffer at early boot.  This code figures out
1062  * how much was set aside so we can use it for our own purposes.
1063  */
1064 static int i915_probe_agp(struct drm_device *dev, uint32_t *aperture_size,
1065                           uint32_t *preallocated_size,
1066                           uint32_t *start)
1067 {
1068         struct drm_i915_private *dev_priv = dev->dev_private;
1069         u16 tmp = 0;
1070         unsigned long overhead;
1071         unsigned long stolen;
1072
1073         /* Get the fb aperture size and "stolen" memory amount. */
1074         pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &tmp);
1075
1076         *aperture_size = 1024 * 1024;
1077         *preallocated_size = 1024 * 1024;
1078
1079         switch (dev->pdev->device) {
1080         case PCI_DEVICE_ID_INTEL_82830_CGC:
1081         case PCI_DEVICE_ID_INTEL_82845G_IG:
1082         case PCI_DEVICE_ID_INTEL_82855GM_IG:
1083         case PCI_DEVICE_ID_INTEL_82865_IG:
1084                 if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M)
1085                         *aperture_size *= 64;
1086                 else
1087                         *aperture_size *= 128;
1088                 break;
1089         default:
1090                 /* 9xx supports large sizes, just look at the length */
1091                 *aperture_size = pci_resource_len(dev->pdev, 2);
1092                 break;
1093         }
1094
1095         /*
1096          * Some of the preallocated space is taken by the GTT
1097          * and popup.  GTT is 1K per MB of aperture size, and popup is 4K.
1098          */
1099         if (IS_G4X(dev) || IS_PINEVIEW(dev) || IS_IRONLAKE(dev) || IS_GEN6(dev))
1100                 overhead = 4096;
1101         else
1102                 overhead = (*aperture_size / 1024) + 4096;
1103
1104         if (IS_GEN6(dev)) {
1105                 /* SNB has memory control reg at 0x50.w */
1106                 pci_read_config_word(dev->pdev, SNB_GMCH_CTRL, &tmp);
1107
1108                 switch (tmp & SNB_GMCH_GMS_STOLEN_MASK) {
1109                 case INTEL_855_GMCH_GMS_DISABLED:
1110                         DRM_ERROR("video memory is disabled\n");
1111                         return -1;
1112                 case SNB_GMCH_GMS_STOLEN_32M:
1113                         stolen = 32 * 1024 * 1024;
1114                         break;
1115                 case SNB_GMCH_GMS_STOLEN_64M:
1116                         stolen = 64 * 1024 * 1024;
1117                         break;
1118                 case SNB_GMCH_GMS_STOLEN_96M:
1119                         stolen = 96 * 1024 * 1024;
1120                         break;
1121                 case SNB_GMCH_GMS_STOLEN_128M:
1122                         stolen = 128 * 1024 * 1024;
1123                         break;
1124                 case SNB_GMCH_GMS_STOLEN_160M:
1125                         stolen = 160 * 1024 * 1024;
1126                         break;
1127                 case SNB_GMCH_GMS_STOLEN_192M:
1128                         stolen = 192 * 1024 * 1024;
1129                         break;
1130                 case SNB_GMCH_GMS_STOLEN_224M:
1131                         stolen = 224 * 1024 * 1024;
1132                         break;
1133                 case SNB_GMCH_GMS_STOLEN_256M:
1134                         stolen = 256 * 1024 * 1024;
1135                         break;
1136                 case SNB_GMCH_GMS_STOLEN_288M:
1137                         stolen = 288 * 1024 * 1024;
1138                         break;
1139                 case SNB_GMCH_GMS_STOLEN_320M:
1140                         stolen = 320 * 1024 * 1024;
1141                         break;
1142                 case SNB_GMCH_GMS_STOLEN_352M:
1143                         stolen = 352 * 1024 * 1024;
1144                         break;
1145                 case SNB_GMCH_GMS_STOLEN_384M:
1146                         stolen = 384 * 1024 * 1024;
1147                         break;
1148                 case SNB_GMCH_GMS_STOLEN_416M:
1149                         stolen = 416 * 1024 * 1024;
1150                         break;
1151                 case SNB_GMCH_GMS_STOLEN_448M:
1152                         stolen = 448 * 1024 * 1024;
1153                         break;
1154                 case SNB_GMCH_GMS_STOLEN_480M:
1155                         stolen = 480 * 1024 * 1024;
1156                         break;
1157                 case SNB_GMCH_GMS_STOLEN_512M:
1158                         stolen = 512 * 1024 * 1024;
1159                         break;
1160                 default:
1161                         DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n",
1162                                   tmp & SNB_GMCH_GMS_STOLEN_MASK);
1163                         return -1;
1164                 }
1165         } else {
1166                 switch (tmp & INTEL_GMCH_GMS_MASK) {
1167                 case INTEL_855_GMCH_GMS_DISABLED:
1168                         DRM_ERROR("video memory is disabled\n");
1169                         return -1;
1170                 case INTEL_855_GMCH_GMS_STOLEN_1M:
1171                         stolen = 1 * 1024 * 1024;
1172                         break;
1173                 case INTEL_855_GMCH_GMS_STOLEN_4M:
1174                         stolen = 4 * 1024 * 1024;
1175                         break;
1176                 case INTEL_855_GMCH_GMS_STOLEN_8M:
1177                         stolen = 8 * 1024 * 1024;
1178                         break;
1179                 case INTEL_855_GMCH_GMS_STOLEN_16M:
1180                         stolen = 16 * 1024 * 1024;
1181                         break;
1182                 case INTEL_855_GMCH_GMS_STOLEN_32M:
1183                         stolen = 32 * 1024 * 1024;
1184                         break;
1185                 case INTEL_915G_GMCH_GMS_STOLEN_48M:
1186                         stolen = 48 * 1024 * 1024;
1187                         break;
1188                 case INTEL_915G_GMCH_GMS_STOLEN_64M:
1189                         stolen = 64 * 1024 * 1024;
1190                         break;
1191                 case INTEL_GMCH_GMS_STOLEN_128M:
1192                         stolen = 128 * 1024 * 1024;
1193                         break;
1194                 case INTEL_GMCH_GMS_STOLEN_256M:
1195                         stolen = 256 * 1024 * 1024;
1196                         break;
1197                 case INTEL_GMCH_GMS_STOLEN_96M:
1198                         stolen = 96 * 1024 * 1024;
1199                         break;
1200                 case INTEL_GMCH_GMS_STOLEN_160M:
1201                         stolen = 160 * 1024 * 1024;
1202                         break;
1203                 case INTEL_GMCH_GMS_STOLEN_224M:
1204                         stolen = 224 * 1024 * 1024;
1205                         break;
1206                 case INTEL_GMCH_GMS_STOLEN_352M:
1207                         stolen = 352 * 1024 * 1024;
1208                         break;
1209                 default:
1210                         DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n",
1211                                   tmp & INTEL_GMCH_GMS_MASK);
1212                         return -1;
1213                 }
1214         }
1215
1216         *preallocated_size = stolen - overhead;
1217         *start = overhead;
1218
1219         return 0;
1220 }
1221
1222 #define PTE_ADDRESS_MASK                0xfffff000
1223 #define PTE_ADDRESS_MASK_HIGH           0x000000f0 /* i915+ */
1224 #define PTE_MAPPING_TYPE_UNCACHED       (0 << 1)
1225 #define PTE_MAPPING_TYPE_DCACHE         (1 << 1) /* i830 only */
1226 #define PTE_MAPPING_TYPE_CACHED         (3 << 1)
1227 #define PTE_MAPPING_TYPE_MASK           (3 << 1)
1228 #define PTE_VALID                       (1 << 0)
1229
1230 /**
1231  * i915_gtt_to_phys - take a GTT address and turn it into a physical one
1232  * @dev: drm device
1233  * @gtt_addr: address to translate
1234  *
1235  * Some chip functions require allocations from stolen space but need the
1236  * physical address of the memory in question.  We use this routine
1237  * to get a physical address suitable for register programming from a given
1238  * GTT address.
1239  */
1240 static unsigned long i915_gtt_to_phys(struct drm_device *dev,
1241                                       unsigned long gtt_addr)
1242 {
1243         unsigned long *gtt;
1244         unsigned long entry, phys;
1245         int gtt_bar = IS_I9XX(dev) ? 0 : 1;
1246         int gtt_offset, gtt_size;
1247
1248         if (IS_I965G(dev)) {
1249                 if (IS_G4X(dev) || IS_IRONLAKE(dev) || IS_GEN6(dev)) {
1250                         gtt_offset = 2*1024*1024;
1251                         gtt_size = 2*1024*1024;
1252                 } else {
1253                         gtt_offset = 512*1024;
1254                         gtt_size = 512*1024;
1255                 }
1256         } else {
1257                 gtt_bar = 3;
1258                 gtt_offset = 0;
1259                 gtt_size = pci_resource_len(dev->pdev, gtt_bar);
1260         }
1261
1262         gtt = ioremap_wc(pci_resource_start(dev->pdev, gtt_bar) + gtt_offset,
1263                          gtt_size);
1264         if (!gtt) {
1265                 DRM_ERROR("ioremap of GTT failed\n");
1266                 return 0;
1267         }
1268
1269         entry = *(volatile u32 *)(gtt + (gtt_addr / 1024));
1270
1271         DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, PTE: 0x%08lx\n", gtt_addr, entry);
1272
1273         /* Mask out these reserved bits on this hardware. */
1274         if (!IS_I9XX(dev) || IS_I915G(dev) || IS_I915GM(dev) ||
1275             IS_I945G(dev) || IS_I945GM(dev)) {
1276                 entry &= ~PTE_ADDRESS_MASK_HIGH;
1277         }
1278
1279         /* If it's not a mapping type we know, then bail. */
1280         if ((entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_UNCACHED &&
1281             (entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_CACHED) {
1282                 iounmap(gtt);
1283                 return 0;
1284         }
1285
1286         if (!(entry & PTE_VALID)) {
1287                 DRM_ERROR("bad GTT entry in stolen space\n");
1288                 iounmap(gtt);
1289                 return 0;
1290         }
1291
1292         iounmap(gtt);
1293
1294         phys =(entry & PTE_ADDRESS_MASK) |
1295                 ((uint64_t)(entry & PTE_ADDRESS_MASK_HIGH) << (32 - 4));
1296
1297         DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, phys addr: 0x%08lx\n", gtt_addr, phys);
1298
1299         return phys;
1300 }
1301
1302 static void i915_warn_stolen(struct drm_device *dev)
1303 {
1304         DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1305         DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1306 }
1307
1308 static void i915_setup_compression(struct drm_device *dev, int size)
1309 {
1310         struct drm_i915_private *dev_priv = dev->dev_private;
1311         struct drm_mm_node *compressed_fb, *compressed_llb;
1312         unsigned long cfb_base;
1313         unsigned long ll_base = 0;
1314
1315         /* Leave 1M for line length buffer & misc. */
1316         compressed_fb = drm_mm_search_free(&dev_priv->vram, size, 4096, 0);
1317         if (!compressed_fb) {
1318                 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1319                 i915_warn_stolen(dev);
1320                 return;
1321         }
1322
1323         compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1324         if (!compressed_fb) {
1325                 i915_warn_stolen(dev);
1326                 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1327                 return;
1328         }
1329
1330         cfb_base = i915_gtt_to_phys(dev, compressed_fb->start);
1331         if (!cfb_base) {
1332                 DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1333                 drm_mm_put_block(compressed_fb);
1334         }
1335
1336         if (!IS_GM45(dev)) {
1337                 compressed_llb = drm_mm_search_free(&dev_priv->vram, 4096,
1338                                                     4096, 0);
1339                 if (!compressed_llb) {
1340                         i915_warn_stolen(dev);
1341                         return;
1342                 }
1343
1344                 compressed_llb = drm_mm_get_block(compressed_llb, 4096, 4096);
1345                 if (!compressed_llb) {
1346                         i915_warn_stolen(dev);
1347                         return;
1348                 }
1349
1350                 ll_base = i915_gtt_to_phys(dev, compressed_llb->start);
1351                 if (!ll_base) {
1352                         DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1353                         drm_mm_put_block(compressed_fb);
1354                         drm_mm_put_block(compressed_llb);
1355                 }
1356         }
1357
1358         dev_priv->cfb_size = size;
1359
1360         dev_priv->compressed_fb = compressed_fb;
1361
1362         if (IS_GM45(dev)) {
1363                 g4x_disable_fbc(dev);
1364                 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1365         } else {
1366                 i8xx_disable_fbc(dev);
1367                 I915_WRITE(FBC_CFB_BASE, cfb_base);
1368                 I915_WRITE(FBC_LL_BASE, ll_base);
1369                 dev_priv->compressed_llb = compressed_llb;
1370         }
1371
1372         DRM_DEBUG("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", cfb_base,
1373                   ll_base, size >> 20);
1374 }
1375
1376 static void i915_cleanup_compression(struct drm_device *dev)
1377 {
1378         struct drm_i915_private *dev_priv = dev->dev_private;
1379
1380         drm_mm_put_block(dev_priv->compressed_fb);
1381         if (!IS_GM45(dev))
1382                 drm_mm_put_block(dev_priv->compressed_llb);
1383 }
1384
1385 /* true = enable decode, false = disable decoder */
1386 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1387 {
1388         struct drm_device *dev = cookie;
1389
1390         intel_modeset_vga_set_state(dev, state);
1391         if (state)
1392                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1393                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1394         else
1395                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1396 }
1397
1398 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1399 {
1400         struct drm_device *dev = pci_get_drvdata(pdev);
1401         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
1402         if (state == VGA_SWITCHEROO_ON) {
1403                 printk(KERN_INFO "i915: switched off\n");
1404                 /* i915 resume handler doesn't set to D0 */
1405                 pci_set_power_state(dev->pdev, PCI_D0);
1406                 i915_resume(dev);
1407         } else {
1408                 printk(KERN_ERR "i915: switched off\n");
1409                 i915_suspend(dev, pmm);
1410         }
1411 }
1412
1413 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
1414 {
1415         struct drm_device *dev = pci_get_drvdata(pdev);
1416         bool can_switch;
1417
1418         spin_lock(&dev->count_lock);
1419         can_switch = (dev->open_count == 0);
1420         spin_unlock(&dev->count_lock);
1421         return can_switch;
1422 }
1423
1424 static int i915_load_modeset_init(struct drm_device *dev,
1425                                   unsigned long prealloc_start,
1426                                   unsigned long prealloc_size,
1427                                   unsigned long agp_size)
1428 {
1429         struct drm_i915_private *dev_priv = dev->dev_private;
1430         int fb_bar = IS_I9XX(dev) ? 2 : 0;
1431         int ret = 0;
1432
1433         dev->mode_config.fb_base = drm_get_resource_start(dev, fb_bar) &
1434                 0xff000000;
1435
1436         /* Basic memrange allocator for stolen space (aka vram) */
1437         drm_mm_init(&dev_priv->vram, 0, prealloc_size);
1438         DRM_INFO("set up %ldM of stolen space\n", prealloc_size / (1024*1024));
1439
1440         /* We're off and running w/KMS */
1441         dev_priv->mm.suspended = 0;
1442
1443         /* Let GEM Manage from end of prealloc space to end of aperture.
1444          *
1445          * However, leave one page at the end still bound to the scratch page.
1446          * There are a number of places where the hardware apparently
1447          * prefetches past the end of the object, and we've seen multiple
1448          * hangs with the GPU head pointer stuck in a batchbuffer bound
1449          * at the last page of the aperture.  One page should be enough to
1450          * keep any prefetching inside of the aperture.
1451          */
1452         i915_gem_do_init(dev, prealloc_size, agp_size - 4096);
1453
1454         mutex_lock(&dev->struct_mutex);
1455         ret = i915_gem_init_ringbuffer(dev);
1456         mutex_unlock(&dev->struct_mutex);
1457         if (ret)
1458                 goto out;
1459
1460         /* Try to set up FBC with a reasonable compressed buffer size */
1461         if (I915_HAS_FBC(dev) && i915_powersave) {
1462                 int cfb_size;
1463
1464                 /* Try to get an 8M buffer... */
1465                 if (prealloc_size > (9*1024*1024))
1466                         cfb_size = 8*1024*1024;
1467                 else /* fall back to 7/8 of the stolen space */
1468                         cfb_size = prealloc_size * 7 / 8;
1469                 i915_setup_compression(dev, cfb_size);
1470         }
1471
1472         /* Allow hardware batchbuffers unless told otherwise.
1473          */
1474         dev_priv->allow_batchbuffer = 1;
1475
1476         ret = intel_init_bios(dev);
1477         if (ret)
1478                 DRM_INFO("failed to find VBIOS tables\n");
1479
1480         /* if we have > 1 VGA cards, then disable the radeon VGA resources */
1481         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1482         if (ret)
1483                 goto destroy_ringbuffer;
1484
1485         ret = vga_switcheroo_register_client(dev->pdev,
1486                                              i915_switcheroo_set_state,
1487                                              i915_switcheroo_can_switch);
1488         if (ret)
1489                 goto destroy_ringbuffer;
1490
1491         intel_modeset_init(dev);
1492
1493         ret = drm_irq_install(dev);
1494         if (ret)
1495                 goto destroy_ringbuffer;
1496
1497         /* Always safe in the mode setting case. */
1498         /* FIXME: do pre/post-mode set stuff in core KMS code */
1499         dev->vblank_disable_allowed = 1;
1500
1501         /*
1502          * Initialize the hardware status page IRQ location.
1503          */
1504
1505         I915_WRITE(INSTPM, (1 << 5) | (1 << 21));
1506
1507         drm_helper_initial_config(dev);
1508
1509         return 0;
1510
1511 destroy_ringbuffer:
1512         mutex_lock(&dev->struct_mutex);
1513         i915_gem_cleanup_ringbuffer(dev);
1514         mutex_unlock(&dev->struct_mutex);
1515 out:
1516         return ret;
1517 }
1518
1519 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1520 {
1521         struct drm_i915_master_private *master_priv;
1522
1523         master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1524         if (!master_priv)
1525                 return -ENOMEM;
1526
1527         master->driver_priv = master_priv;
1528         return 0;
1529 }
1530
1531 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1532 {
1533         struct drm_i915_master_private *master_priv = master->driver_priv;
1534
1535         if (!master_priv)
1536                 return;
1537
1538         kfree(master_priv);
1539
1540         master->driver_priv = NULL;
1541 }
1542
1543 static void i915_get_mem_freq(struct drm_device *dev)
1544 {
1545         drm_i915_private_t *dev_priv = dev->dev_private;
1546         u32 tmp;
1547
1548         if (!IS_PINEVIEW(dev))
1549                 return;
1550
1551         tmp = I915_READ(CLKCFG);
1552
1553         switch (tmp & CLKCFG_FSB_MASK) {
1554         case CLKCFG_FSB_533:
1555                 dev_priv->fsb_freq = 533; /* 133*4 */
1556                 break;
1557         case CLKCFG_FSB_800:
1558                 dev_priv->fsb_freq = 800; /* 200*4 */
1559                 break;
1560         case CLKCFG_FSB_667:
1561                 dev_priv->fsb_freq =  667; /* 167*4 */
1562                 break;
1563         case CLKCFG_FSB_400:
1564                 dev_priv->fsb_freq = 400; /* 100*4 */
1565                 break;
1566         }
1567
1568         switch (tmp & CLKCFG_MEM_MASK) {
1569         case CLKCFG_MEM_533:
1570                 dev_priv->mem_freq = 533;
1571                 break;
1572         case CLKCFG_MEM_667:
1573                 dev_priv->mem_freq = 667;
1574                 break;
1575         case CLKCFG_MEM_800:
1576                 dev_priv->mem_freq = 800;
1577                 break;
1578         }
1579 }
1580
1581 /**
1582  * i915_driver_load - setup chip and create an initial config
1583  * @dev: DRM device
1584  * @flags: startup flags
1585  *
1586  * The driver load routine has to do several things:
1587  *   - drive output discovery via intel_modeset_init()
1588  *   - initialize the memory manager
1589  *   - allocate initial config memory
1590  *   - setup the DRM framebuffer with the allocated memory
1591  */
1592 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1593 {
1594         struct drm_i915_private *dev_priv = dev->dev_private;
1595         resource_size_t base, size;
1596         int ret = 0, mmio_bar;
1597         uint32_t agp_size, prealloc_size, prealloc_start;
1598
1599         /* i915 has 4 more counters */
1600         dev->counters += 4;
1601         dev->types[6] = _DRM_STAT_IRQ;
1602         dev->types[7] = _DRM_STAT_PRIMARY;
1603         dev->types[8] = _DRM_STAT_SECONDARY;
1604         dev->types[9] = _DRM_STAT_DMA;
1605
1606         dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1607         if (dev_priv == NULL)
1608                 return -ENOMEM;
1609
1610         dev->dev_private = (void *)dev_priv;
1611         dev_priv->dev = dev;
1612         dev_priv->info = (struct intel_device_info *) flags;
1613
1614         /* Add register map (needed for suspend/resume) */
1615         mmio_bar = IS_I9XX(dev) ? 0 : 1;
1616         base = drm_get_resource_start(dev, mmio_bar);
1617         size = drm_get_resource_len(dev, mmio_bar);
1618
1619         if (i915_get_bridge_dev(dev)) {
1620                 ret = -EIO;
1621                 goto free_priv;
1622         }
1623
1624         dev_priv->regs = ioremap(base, size);
1625         if (!dev_priv->regs) {
1626                 DRM_ERROR("failed to map registers\n");
1627                 ret = -EIO;
1628                 goto put_bridge;
1629         }
1630
1631         dev_priv->mm.gtt_mapping =
1632                 io_mapping_create_wc(dev->agp->base,
1633                                      dev->agp->agp_info.aper_size * 1024*1024);
1634         if (dev_priv->mm.gtt_mapping == NULL) {
1635                 ret = -EIO;
1636                 goto out_rmmap;
1637         }
1638
1639         /* Set up a WC MTRR for non-PAT systems.  This is more common than
1640          * one would think, because the kernel disables PAT on first
1641          * generation Core chips because WC PAT gets overridden by a UC
1642          * MTRR if present.  Even if a UC MTRR isn't present.
1643          */
1644         dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1645                                          dev->agp->agp_info.aper_size *
1646                                          1024 * 1024,
1647                                          MTRR_TYPE_WRCOMB, 1);
1648         if (dev_priv->mm.gtt_mtrr < 0) {
1649                 DRM_INFO("MTRR allocation failed.  Graphics "
1650                          "performance may suffer.\n");
1651         }
1652
1653         ret = i915_probe_agp(dev, &agp_size, &prealloc_size, &prealloc_start);
1654         if (ret)
1655                 goto out_iomapfree;
1656
1657         dev_priv->wq = create_singlethread_workqueue("i915");
1658         if (dev_priv->wq == NULL) {
1659                 DRM_ERROR("Failed to create our workqueue.\n");
1660                 ret = -ENOMEM;
1661                 goto out_iomapfree;
1662         }
1663
1664         /* enable GEM by default */
1665         dev_priv->has_gem = 1;
1666
1667         if (prealloc_size > agp_size * 3 / 4) {
1668                 DRM_ERROR("Detected broken video BIOS with %d/%dkB of video "
1669                           "memory stolen.\n",
1670                           prealloc_size / 1024, agp_size / 1024);
1671                 DRM_ERROR("Disabling GEM. (try reducing stolen memory or "
1672                           "updating the BIOS to fix).\n");
1673                 dev_priv->has_gem = 0;
1674         }
1675
1676         dev->driver->get_vblank_counter = i915_get_vblank_counter;
1677         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
1678         if (IS_G4X(dev) || IS_IRONLAKE(dev) || IS_GEN6(dev)) {
1679                 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
1680                 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
1681         }
1682
1683         /* Try to make sure MCHBAR is enabled before poking at it */
1684         intel_setup_mchbar(dev);
1685
1686         i915_gem_load(dev);
1687
1688         /* Init HWS */
1689         if (!I915_NEED_GFX_HWS(dev)) {
1690                 ret = i915_init_phys_hws(dev);
1691                 if (ret != 0)
1692                         goto out_workqueue_free;
1693         }
1694
1695         i915_get_mem_freq(dev);
1696
1697         /* On the 945G/GM, the chipset reports the MSI capability on the
1698          * integrated graphics even though the support isn't actually there
1699          * according to the published specs.  It doesn't appear to function
1700          * correctly in testing on 945G.
1701          * This may be a side effect of MSI having been made available for PEG
1702          * and the registers being closely associated.
1703          *
1704          * According to chipset errata, on the 965GM, MSI interrupts may
1705          * be lost or delayed, but we use them anyways to avoid
1706          * stuck interrupts on some machines.
1707          */
1708         if (!IS_I945G(dev) && !IS_I945GM(dev))
1709                 pci_enable_msi(dev->pdev);
1710
1711         spin_lock_init(&dev_priv->user_irq_lock);
1712         spin_lock_init(&dev_priv->error_lock);
1713         dev_priv->user_irq_refcount = 0;
1714         dev_priv->trace_irq_seqno = 0;
1715
1716         ret = drm_vblank_init(dev, I915_NUM_PIPE);
1717
1718         if (ret) {
1719                 (void) i915_driver_unload(dev);
1720                 return ret;
1721         }
1722
1723         /* Start out suspended */
1724         dev_priv->mm.suspended = 1;
1725
1726         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1727                 ret = i915_load_modeset_init(dev, prealloc_start,
1728                                              prealloc_size, agp_size);
1729                 if (ret < 0) {
1730                         DRM_ERROR("failed to init modeset\n");
1731                         goto out_workqueue_free;
1732                 }
1733         }
1734
1735         /* Must be done after probing outputs */
1736         intel_opregion_init(dev, 0);
1737
1738         setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
1739                     (unsigned long) dev);
1740         return 0;
1741
1742 out_workqueue_free:
1743         destroy_workqueue(dev_priv->wq);
1744 out_iomapfree:
1745         io_mapping_free(dev_priv->mm.gtt_mapping);
1746 out_rmmap:
1747         iounmap(dev_priv->regs);
1748 put_bridge:
1749         pci_dev_put(dev_priv->bridge_dev);
1750 free_priv:
1751         kfree(dev_priv);
1752         return ret;
1753 }
1754
1755 int i915_driver_unload(struct drm_device *dev)
1756 {
1757         struct drm_i915_private *dev_priv = dev->dev_private;
1758
1759         i915_destroy_error_state(dev);
1760
1761         destroy_workqueue(dev_priv->wq);
1762         del_timer_sync(&dev_priv->hangcheck_timer);
1763
1764         io_mapping_free(dev_priv->mm.gtt_mapping);
1765         if (dev_priv->mm.gtt_mtrr >= 0) {
1766                 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
1767                          dev->agp->agp_info.aper_size * 1024 * 1024);
1768                 dev_priv->mm.gtt_mtrr = -1;
1769         }
1770
1771         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1772                 /*
1773                  * free the memory space allocated for the child device
1774                  * config parsed from VBT
1775                  */
1776                 if (dev_priv->child_dev && dev_priv->child_dev_num) {
1777                         kfree(dev_priv->child_dev);
1778                         dev_priv->child_dev = NULL;
1779                         dev_priv->child_dev_num = 0;
1780                 }
1781                 drm_irq_uninstall(dev);
1782                 vga_switcheroo_unregister_client(dev->pdev);
1783                 vga_client_register(dev->pdev, NULL, NULL, NULL);
1784         }
1785
1786         if (dev->pdev->msi_enabled)
1787                 pci_disable_msi(dev->pdev);
1788
1789         if (dev_priv->regs != NULL)
1790                 iounmap(dev_priv->regs);
1791
1792         intel_opregion_free(dev, 0);
1793
1794         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1795                 intel_modeset_cleanup(dev);
1796
1797                 i915_gem_free_all_phys_object(dev);
1798
1799                 mutex_lock(&dev->struct_mutex);
1800                 i915_gem_cleanup_ringbuffer(dev);
1801                 mutex_unlock(&dev->struct_mutex);
1802                 if (I915_HAS_FBC(dev) && i915_powersave)
1803                         i915_cleanup_compression(dev);
1804                 drm_mm_takedown(&dev_priv->vram);
1805                 i915_gem_lastclose(dev);
1806
1807                 intel_cleanup_overlay(dev);
1808         }
1809
1810         intel_teardown_mchbar(dev);
1811
1812         pci_dev_put(dev_priv->bridge_dev);
1813         kfree(dev->dev_private);
1814
1815         return 0;
1816 }
1817
1818 int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv)
1819 {
1820         struct drm_i915_file_private *i915_file_priv;
1821
1822         DRM_DEBUG_DRIVER("\n");
1823         i915_file_priv = (struct drm_i915_file_private *)
1824             kmalloc(sizeof(*i915_file_priv), GFP_KERNEL);
1825
1826         if (!i915_file_priv)
1827                 return -ENOMEM;
1828
1829         file_priv->driver_priv = i915_file_priv;
1830
1831         INIT_LIST_HEAD(&i915_file_priv->mm.request_list);
1832
1833         return 0;
1834 }
1835
1836 /**
1837  * i915_driver_lastclose - clean up after all DRM clients have exited
1838  * @dev: DRM device
1839  *
1840  * Take care of cleaning up after all DRM clients have exited.  In the
1841  * mode setting case, we want to restore the kernel's initial mode (just
1842  * in case the last client left us in a bad state).
1843  *
1844  * Additionally, in the non-mode setting case, we'll tear down the AGP
1845  * and DMA structures, since the kernel won't be using them, and clea
1846  * up any GEM state.
1847  */
1848 void i915_driver_lastclose(struct drm_device * dev)
1849 {
1850         drm_i915_private_t *dev_priv = dev->dev_private;
1851
1852         if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
1853                 drm_fb_helper_restore();
1854                 vga_switcheroo_process_delayed_switch();
1855                 return;
1856         }
1857
1858         i915_gem_lastclose(dev);
1859
1860         if (dev_priv->agp_heap)
1861                 i915_mem_takedown(&(dev_priv->agp_heap));
1862
1863         i915_dma_cleanup(dev);
1864 }
1865
1866 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
1867 {
1868         drm_i915_private_t *dev_priv = dev->dev_private;
1869         i915_gem_release(dev, file_priv);
1870         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1871                 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
1872 }
1873
1874 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file_priv)
1875 {
1876         struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv;
1877
1878         kfree(i915_file_priv);
1879 }
1880
1881 struct drm_ioctl_desc i915_ioctls[] = {
1882         DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1883         DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
1884         DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH),
1885         DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
1886         DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
1887         DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
1888         DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH),
1889         DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1890         DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH),
1891         DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH),
1892         DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1893         DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
1894         DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
1895         DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
1896         DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH ),
1897         DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
1898         DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1899         DRM_IOCTL_DEF(DRM_I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
1900         DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
1901         DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED),
1902         DRM_IOCTL_DEF(DRM_I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
1903         DRM_IOCTL_DEF(DRM_I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
1904         DRM_IOCTL_DEF(DRM_I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
1905         DRM_IOCTL_DEF(DRM_I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED),
1906         DRM_IOCTL_DEF(DRM_I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
1907         DRM_IOCTL_DEF(DRM_I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
1908         DRM_IOCTL_DEF(DRM_I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED),
1909         DRM_IOCTL_DEF(DRM_I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED),
1910         DRM_IOCTL_DEF(DRM_I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED),
1911         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED),
1912         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED),
1913         DRM_IOCTL_DEF(DRM_I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED),
1914         DRM_IOCTL_DEF(DRM_I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED),
1915         DRM_IOCTL_DEF(DRM_I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED),
1916         DRM_IOCTL_DEF(DRM_I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED),
1917         DRM_IOCTL_DEF(DRM_I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED),
1918         DRM_IOCTL_DEF(DRM_I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
1919         DRM_IOCTL_DEF(DRM_I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED),
1920         DRM_IOCTL_DEF(DRM_I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
1921         DRM_IOCTL_DEF(DRM_I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
1922 };
1923
1924 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
1925
1926 /**
1927  * Determine if the device really is AGP or not.
1928  *
1929  * All Intel graphics chipsets are treated as AGP, even if they are really
1930  * PCI-e.
1931  *
1932  * \param dev   The device to be tested.
1933  *
1934  * \returns
1935  * A value of 1 is always retured to indictate every i9x5 is AGP.
1936  */
1937 int i915_driver_device_is_agp(struct drm_device * dev)
1938 {
1939         return 1;
1940 }