drivers/gpu/drm/i915/i915_dma.c

   1 /* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
   2  */
   3 /*
   4  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  */
  28
  29 #include "drmP.h"
  30 #include "drm.h"
  31 #include "drm_crtc_helper.h"
  32 #include "drm_fb_helper.h"
  33 #include "intel_drv.h"
  34 #include "i915_drm.h"
  35 #include "i915_drv.h"
  36 #include "i915_trace.h"
  37 #include "../../../platform/x86/intel_ips.h"
  38 #include <linux/pci.h>
  39 #include <linux/vgaarb.h>
  40 #include <linux/acpi.h>
  41 #include <linux/pnp.h>
  42 #include <linux/vga_switcheroo.h>
  43 #include <linux/slab.h>
  44 #include <acpi/video.h>
  45
  46 /**
  47  * Sets up the hardware status page for devices that need a physical address
  48  * in the register.
  49  */
  50 static int i915_init_phys_hws(struct drm_device *dev)
  51 {
  52         drm_i915_private_t *dev_priv = dev->dev_private;
  53         /* Program Hardware Status Page */
  54         dev_priv->status_page_dmah =
  55                 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE);
  56
  57         if (!dev_priv->status_page_dmah) {
  58                 DRM_ERROR("Can not allocate hardware status page\n");
  59                 return -ENOMEM;
  60         }
  61         dev_priv->render_ring.status_page.page_addr
  62                 = dev_priv->status_page_dmah->vaddr;
  63         dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
  64
  65         memset(dev_priv->render_ring.status_page.page_addr, 0, PAGE_SIZE);
  66
  67         if (INTEL_INFO(dev)->gen >= 4)
  68                 dev_priv->dma_status_page |= (dev_priv->dma_status_page >> 28) &
  69                                              0xf0;
  70
  71         I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
  72         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
  73         return 0;
  74 }
  75
  76 /**
  77  * Frees the hardware status page, whether it's a physical address or a virtual
  78  * address set up by the X Server.
  79  */
  80 static void i915_free_hws(struct drm_device *dev)
  81 {
  82         drm_i915_private_t *dev_priv = dev->dev_private;
  83         if (dev_priv->status_page_dmah) {
  84                 drm_pci_free(dev, dev_priv->status_page_dmah);
  85                 dev_priv->status_page_dmah = NULL;
  86         }
  87
  88         if (dev_priv->render_ring.status_page.gfx_addr) {
  89                 dev_priv->render_ring.status_page.gfx_addr = 0;
  90                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
  91         }
  92
  93         /* Need to rewrite hardware status page */
  94         I915_WRITE(HWS_PGA, 0x1ffff000);
  95 }
  96
  97 void i915_kernel_lost_context(struct drm_device * dev)
  98 {
  99         drm_i915_private_t *dev_priv = dev->dev_private;
 100         struct drm_i915_master_private *master_priv;
 101         struct intel_ring_buffer *ring = &dev_priv->render_ring;
 102
 103         /*
 104          * We should never lose context on the ring with modesetting
 105          * as we don't expose it to userspace
 106          */
 107         if (drm_core_check_feature(dev, DRIVER_MODESET))
 108                 return;
 109
 110         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 111         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 112         ring->space = ring->head - (ring->tail + 8);
 113         if (ring->space < 0)
 114                 ring->space += ring->size;
 115
 116         if (!dev->primary->master)
 117                 return;
 118
 119         master_priv = dev->primary->master->driver_priv;
 120         if (ring->head == ring->tail && master_priv->sarea_priv)
 121                 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 122 }
 123
 124 static int i915_dma_cleanup(struct drm_device * dev)
 125 {
 126         drm_i915_private_t *dev_priv = dev->dev_private;
 127         /* Make sure interrupts are disabled here because the uninstall ioctl
 128          * may not have been called from userspace and after dev_private
 129          * is freed, it's too late.
 130          */
 131         if (dev->irq_enabled)
 132                 drm_irq_uninstall(dev);
 133
 134         mutex_lock(&dev->struct_mutex);
 135         intel_cleanup_ring_buffer(dev, &dev_priv->render_ring);
 136         intel_cleanup_ring_buffer(dev, &dev_priv->bsd_ring);
 137         intel_cleanup_ring_buffer(dev, &dev_priv->blt_ring);
 138         mutex_unlock(&dev->struct_mutex);
 139
 140         /* Clear the HWS virtual address at teardown */
 141         if (I915_NEED_GFX_HWS(dev))
 142                 i915_free_hws(dev);
 143
 144         return 0;
 145 }
 146
 147 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 148 {
 149         drm_i915_private_t *dev_priv = dev->dev_private;
 150         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 151
 152         master_priv->sarea = drm_getsarea(dev);
 153         if (master_priv->sarea) {
 154                 master_priv->sarea_priv = (drm_i915_sarea_t *)
 155                         ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
 156         } else {
 157                 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
 158         }
 159
 160         if (init->ring_size != 0) {
 161                 if (dev_priv->render_ring.gem_object != NULL) {
 162                         i915_dma_cleanup(dev);
 163                         DRM_ERROR("Client tried to initialize ringbuffer in "
 164                                   "GEM mode\n");
 165                         return -EINVAL;
 166                 }
 167
 168                 dev_priv->render_ring.size = init->ring_size;
 169
 170                 dev_priv->render_ring.map.offset = init->ring_start;
 171                 dev_priv->render_ring.map.size = init->ring_size;
 172                 dev_priv->render_ring.map.type = 0;
 173                 dev_priv->render_ring.map.flags = 0;
 174                 dev_priv->render_ring.map.mtrr = 0;
 175
 176                 drm_core_ioremap_wc(&dev_priv->render_ring.map, dev);
 177
 178                 if (dev_priv->render_ring.map.handle == NULL) {
 179                         i915_dma_cleanup(dev);
 180                         DRM_ERROR("can not ioremap virtual address for"
 181                                   " ring buffer\n");
 182                         return -ENOMEM;
 183                 }
 184         }
 185
 186         dev_priv->render_ring.virtual_start = dev_priv->render_ring.map.handle;
 187
 188         dev_priv->cpp = init->cpp;
 189         dev_priv->back_offset = init->back_offset;
 190         dev_priv->front_offset = init->front_offset;
 191         dev_priv->current_page = 0;
 192         if (master_priv->sarea_priv)
 193                 master_priv->sarea_priv->pf_current_page = 0;
 194
 195         /* Allow hardware batchbuffers unless told otherwise.
 196          */
 197         dev_priv->allow_batchbuffer = 1;
 198
 199         return 0;
 200 }
 201
 202 static int i915_dma_resume(struct drm_device * dev)
 203 {
 204         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 205
 206         struct intel_ring_buffer *ring;
 207         DRM_DEBUG_DRIVER("%s\n", __func__);
 208
 209         ring = &dev_priv->render_ring;
 210
 211         if (ring->map.handle == NULL) {
 212                 DRM_ERROR("can not ioremap virtual address for"
 213                           " ring buffer\n");
 214                 return -ENOMEM;
 215         }
 216
 217         /* Program Hardware Status Page */
 218         if (!ring->status_page.page_addr) {
 219                 DRM_ERROR("Can not find hardware status page\n");
 220                 return -EINVAL;
 221         }
 222         DRM_DEBUG_DRIVER("hw status page @ %p\n",
 223                                 ring->status_page.page_addr);
 224         if (ring->status_page.gfx_addr != 0)
 225                 intel_ring_setup_status_page(dev, ring);
 226         else
 227                 I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 228
 229         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 230
 231         return 0;
 232 }
 233
 234 static int i915_dma_init(struct drm_device *dev, void *data,
 235                          struct drm_file *file_priv)
 236 {
 237         drm_i915_init_t *init = data;
 238         int retcode = 0;
 239
 240         switch (init->func) {
 241         case I915_INIT_DMA:
 242                 retcode = i915_initialize(dev, init);
 243                 break;
 244         case I915_CLEANUP_DMA:
 245                 retcode = i915_dma_cleanup(dev);
 246                 break;
 247         case I915_RESUME_DMA:
 248                 retcode = i915_dma_resume(dev);
 249                 break;
 250         default:
 251                 retcode = -EINVAL;
 252                 break;
 253         }
 254
 255         return retcode;
 256 }
 257
 258 /* Implement basically the same security restrictions as hardware does
 259  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 260  *
 261  * Most of the calculations below involve calculating the size of a
 262  * particular instruction.  It's important to get the size right as
 263  * that tells us where the next instruction to check is.  Any illegal
 264  * instruction detected will be given a size of zero, which is a
 265  * signal to abort the rest of the buffer.
 266  */
 267 static int do_validate_cmd(int cmd)
 268 {
 269         switch (((cmd >> 29) & 0x7)) {
 270         case 0x0:
 271                 switch ((cmd >> 23) & 0x3f) {
 272                 case 0x0:
 273                         return 1;       /* MI_NOOP */
 274                 case 0x4:
 275                         return 1;       /* MI_FLUSH */
 276                 default:
 277                         return 0;       /* disallow everything else */
 278                 }
 279                 break;
 280         case 0x1:
 281                 return 0;       /* reserved */
 282         case 0x2:
 283                 return (cmd & 0xff) + 2;        /* 2d commands */
 284         case 0x3:
 285                 if (((cmd >> 24) & 0x1f) <= 0x18)
 286                         return 1;
 287
 288                 switch ((cmd >> 24) & 0x1f) {
 289                 case 0x1c:
 290                         return 1;
 291                 case 0x1d:
 292                         switch ((cmd >> 16) & 0xff) {
 293                         case 0x3:
 294                                 return (cmd & 0x1f) + 2;
 295                         case 0x4:
 296                                 return (cmd & 0xf) + 2;
 297                         default:
 298                                 return (cmd & 0xffff) + 2;
 299                         }
 300                 case 0x1e:
 301                         if (cmd & (1 << 23))
 302                                 return (cmd & 0xffff) + 1;
 303                         else
 304                                 return 1;
 305                 case 0x1f:
 306                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 307                                 return (cmd & 0x1ffff) + 2;
 308                         else if (cmd & (1 << 17))       /* indirect random */
 309                                 if ((cmd & 0xffff) == 0)
 310                                         return 0;       /* unknown length, too hard */
 311                                 else
 312                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 313                         else
 314                                 return 2;       /* indirect sequential */
 315                 default:
 316                         return 0;
 317                 }
 318         default:
 319                 return 0;
 320         }
 321
 322         return 0;
 323 }
 324
 325 static int validate_cmd(int cmd)
 326 {
 327         int ret = do_validate_cmd(cmd);
 328
 329 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 330
 331         return ret;
 332 }
 333
 334 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
 335 {
 336         drm_i915_private_t *dev_priv = dev->dev_private;
 337         int i;
 338
 339         if ((dwords+1) * sizeof(int) >= dev_priv->render_ring.size - 8)
 340                 return -EINVAL;
 341
 342         BEGIN_LP_RING((dwords+1)&~1);
 343
 344         for (i = 0; i < dwords;) {
 345                 int cmd, sz;
 346
 347                 cmd = buffer[i];
 348
 349                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 350                         return -EINVAL;
 351
 352                 OUT_RING(cmd);
 353
 354                 while (++i, --sz) {
 355                         OUT_RING(buffer[i]);
 356                 }
 357         }
 358
 359         if (dwords & 1)
 360                 OUT_RING(0);
 361
 362         ADVANCE_LP_RING();
 363
 364         return 0;
 365 }
 366
 367 int
 368 i915_emit_box(struct drm_device *dev,
 369               struct drm_clip_rect *boxes,
 370               int i, int DR1, int DR4)
 371 {
 372         struct drm_clip_rect box = boxes[i];
 373
 374         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 375                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 376                           box.x1, box.y1, box.x2, box.y2);
 377                 return -EINVAL;
 378         }
 379
 380         if (INTEL_INFO(dev)->gen >= 4) {
 381                 BEGIN_LP_RING(4);
 382                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 383                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 384                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 385                 OUT_RING(DR4);
 386                 ADVANCE_LP_RING();
 387         } else {
 388                 BEGIN_LP_RING(6);
 389                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 390                 OUT_RING(DR1);
 391                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 392                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 393                 OUT_RING(DR4);
 394                 OUT_RING(0);
 395                 ADVANCE_LP_RING();
 396         }
 397
 398         return 0;
 399 }
 400
 401 /* XXX: Emitting the counter should really be moved to part of the IRQ
 402  * emit. For now, do it in both places:
 403  */
 404
 405 static void i915_emit_breadcrumb(struct drm_device *dev)
 406 {
 407         drm_i915_private_t *dev_priv = dev->dev_private;
 408         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 409
 410         dev_priv->counter++;
 411         if (dev_priv->counter > 0x7FFFFFFFUL)
 412                 dev_priv->counter = 0;
 413         if (master_priv->sarea_priv)
 414                 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
 415
 416         BEGIN_LP_RING(4);
 417         OUT_RING(MI_STORE_DWORD_INDEX);
 418         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 419         OUT_RING(dev_priv->counter);
 420         OUT_RING(0);
 421         ADVANCE_LP_RING();
 422 }
 423
 424 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 425                                    drm_i915_cmdbuffer_t *cmd,
 426                                    struct drm_clip_rect *cliprects,
 427                                    void *cmdbuf)
 428 {
 429         int nbox = cmd->num_cliprects;
 430         int i = 0, count, ret;
 431
 432         if (cmd->sz & 0x3) {
 433                 DRM_ERROR("alignment");
 434                 return -EINVAL;
 435         }
 436
 437         i915_kernel_lost_context(dev);
 438
 439         count = nbox ? nbox : 1;
 440
 441         for (i = 0; i < count; i++) {
 442                 if (i < nbox) {
 443                         ret = i915_emit_box(dev, cliprects, i,
 444                                             cmd->DR1, cmd->DR4);
 445                         if (ret)
 446                                 return ret;
 447                 }
 448
 449                 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
 450                 if (ret)
 451                         return ret;
 452         }
 453
 454         i915_emit_breadcrumb(dev);
 455         return 0;
 456 }
 457
 458 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 459                                      drm_i915_batchbuffer_t * batch,
 460                                      struct drm_clip_rect *cliprects)
 461 {
 462         int nbox = batch->num_cliprects;
 463         int i = 0, count;
 464
 465         if ((batch->start | batch->used) & 0x7) {
 466                 DRM_ERROR("alignment");
 467                 return -EINVAL;
 468         }
 469
 470         i915_kernel_lost_context(dev);
 471
 472         count = nbox ? nbox : 1;
 473
 474         for (i = 0; i < count; i++) {
 475                 if (i < nbox) {
 476                         int ret = i915_emit_box(dev, cliprects, i,
 477                                                 batch->DR1, batch->DR4);
 478                         if (ret)
 479                                 return ret;
 480                 }
 481
 482                 if (!IS_I830(dev) && !IS_845G(dev)) {
 483                         BEGIN_LP_RING(2);
 484                         if (INTEL_INFO(dev)->gen >= 4) {
 485                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 486                                 OUT_RING(batch->start);
 487                         } else {
 488                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 489                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 490                         }
 491                         ADVANCE_LP_RING();
 492                 } else {
 493                         BEGIN_LP_RING(4);
 494                         OUT_RING(MI_BATCH_BUFFER);
 495                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 496                         OUT_RING(batch->start + batch->used - 4);
 497                         OUT_RING(0);
 498                         ADVANCE_LP_RING();
 499                 }
 500         }
 501
 502
 503         if (IS_G4X(dev) || IS_GEN5(dev)) {
 504                 BEGIN_LP_RING(2);
 505                 OUT_RING(MI_FLUSH | MI_NO_WRITE_FLUSH | MI_INVALIDATE_ISP);
 506                 OUT_RING(MI_NOOP);
 507                 ADVANCE_LP_RING();
 508         }
 509         i915_emit_breadcrumb(dev);
 510
 511         return 0;
 512 }
 513
 514 static int i915_dispatch_flip(struct drm_device * dev)
 515 {
 516         drm_i915_private_t *dev_priv = dev->dev_private;
 517         struct drm_i915_master_private *master_priv =
 518                 dev->primary->master->driver_priv;
 519
 520         if (!master_priv->sarea_priv)
 521                 return -EINVAL;
 522
 523         DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
 524                           __func__,
 525                          dev_priv->current_page,
 526                          master_priv->sarea_priv->pf_current_page);
 527
 528         i915_kernel_lost_context(dev);
 529
 530         BEGIN_LP_RING(2);
 531         OUT_RING(MI_FLUSH | MI_READ_FLUSH);
 532         OUT_RING(0);
 533         ADVANCE_LP_RING();
 534
 535         BEGIN_LP_RING(6);
 536         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 537         OUT_RING(0);
 538         if (dev_priv->current_page == 0) {
 539                 OUT_RING(dev_priv->back_offset);
 540                 dev_priv->current_page = 1;
 541         } else {
 542                 OUT_RING(dev_priv->front_offset);
 543                 dev_priv->current_page = 0;
 544         }
 545         OUT_RING(0);
 546         ADVANCE_LP_RING();
 547
 548         BEGIN_LP_RING(2);
 549         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 550         OUT_RING(0);
 551         ADVANCE_LP_RING();
 552
 553         master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 554
 555         BEGIN_LP_RING(4);
 556         OUT_RING(MI_STORE_DWORD_INDEX);
 557         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 558         OUT_RING(dev_priv->counter);
 559         OUT_RING(0);
 560         ADVANCE_LP_RING();
 561
 562         master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 563         return 0;
 564 }
 565
 566 static int i915_quiescent(struct drm_device * dev)
 567 {
 568         drm_i915_private_t *dev_priv = dev->dev_private;
 569
 570         i915_kernel_lost_context(dev);
 571         return intel_wait_ring_buffer(dev, &dev_priv->render_ring,
 572                                       dev_priv->render_ring.size - 8);
 573 }
 574
 575 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 576                             struct drm_file *file_priv)
 577 {
 578         int ret;
 579
 580         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 581
 582         mutex_lock(&dev->struct_mutex);
 583         ret = i915_quiescent(dev);
 584         mutex_unlock(&dev->struct_mutex);
 585
 586         return ret;
 587 }
 588
 589 static int i915_batchbuffer(struct drm_device *dev, void *data,
 590                             struct drm_file *file_priv)
 591 {
 592         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 593         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 594         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 595             master_priv->sarea_priv;
 596         drm_i915_batchbuffer_t *batch = data;
 597         int ret;
 598         struct drm_clip_rect *cliprects = NULL;
 599
 600         if (!dev_priv->allow_batchbuffer) {
 601                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 602                 return -EINVAL;
 603         }
 604
 605         DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
 606                         batch->start, batch->used, batch->num_cliprects);
 607
 608         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 609
 610         if (batch->num_cliprects < 0)
 611                 return -EINVAL;
 612
 613         if (batch->num_cliprects) {
 614                 cliprects = kcalloc(batch->num_cliprects,
 615                                     sizeof(struct drm_clip_rect),
 616                                     GFP_KERNEL);
 617                 if (cliprects == NULL)
 618                         return -ENOMEM;
 619
 620                 ret = copy_from_user(cliprects, batch->cliprects,
 621                                      batch->num_cliprects *
 622                                      sizeof(struct drm_clip_rect));
 623                 if (ret != 0) {
 624                         ret = -EFAULT;
 625                         goto fail_free;
 626                 }
 627         }
 628
 629         mutex_lock(&dev->struct_mutex);
 630         ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
 631         mutex_unlock(&dev->struct_mutex);
 632
 633         if (sarea_priv)
 634                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 635
 636 fail_free:
 637         kfree(cliprects);
 638
 639         return ret;
 640 }
 641
 642 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 643                           struct drm_file *file_priv)
 644 {
 645         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 646         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 647         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 648             master_priv->sarea_priv;
 649         drm_i915_cmdbuffer_t *cmdbuf = data;
 650         struct drm_clip_rect *cliprects = NULL;
 651         void *batch_data;
 652         int ret;
 653
 654         DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 655                         cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 656
 657         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 658
 659         if (cmdbuf->num_cliprects < 0)
 660                 return -EINVAL;
 661
 662         batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
 663         if (batch_data == NULL)
 664                 return -ENOMEM;
 665
 666         ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
 667         if (ret != 0) {
 668                 ret = -EFAULT;
 669                 goto fail_batch_free;
 670         }
 671
 672         if (cmdbuf->num_cliprects) {
 673                 cliprects = kcalloc(cmdbuf->num_cliprects,
 674                                     sizeof(struct drm_clip_rect), GFP_KERNEL);
 675                 if (cliprects == NULL) {
 676                         ret = -ENOMEM;
 677                         goto fail_batch_free;
 678                 }
 679
 680                 ret = copy_from_user(cliprects, cmdbuf->cliprects,
 681                                      cmdbuf->num_cliprects *
 682                                      sizeof(struct drm_clip_rect));
 683                 if (ret != 0) {
 684                         ret = -EFAULT;
 685                         goto fail_clip_free;
 686                 }
 687         }
 688
 689         mutex_lock(&dev->struct_mutex);
 690         ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
 691         mutex_unlock(&dev->struct_mutex);
 692         if (ret) {
 693                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 694                 goto fail_clip_free;
 695         }
 696
 697         if (sarea_priv)
 698                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 699
 700 fail_clip_free:
 701         kfree(cliprects);
 702 fail_batch_free:
 703         kfree(batch_data);
 704
 705         return ret;
 706 }
 707
 708 static int i915_flip_bufs(struct drm_device *dev, void *data,
 709                           struct drm_file *file_priv)
 710 {
 711         int ret;
 712
 713         DRM_DEBUG_DRIVER("%s\n", __func__);
 714
 715         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 716
 717         mutex_lock(&dev->struct_mutex);
 718         ret = i915_dispatch_flip(dev);
 719         mutex_unlock(&dev->struct_mutex);
 720
 721         return ret;
 722 }
 723
 724 static int i915_getparam(struct drm_device *dev, void *data,
 725                          struct drm_file *file_priv)
 726 {
 727         drm_i915_private_t *dev_priv = dev->dev_private;
 728         drm_i915_getparam_t *param = data;
 729         int value;
 730
 731         if (!dev_priv) {
 732                 DRM_ERROR("called with no initialization\n");
 733                 return -EINVAL;
 734         }
 735
 736         switch (param->param) {
 737         case I915_PARAM_IRQ_ACTIVE:
 738                 value = dev->pdev->irq ? 1 : 0;
 739                 break;
 740         case I915_PARAM_ALLOW_BATCHBUFFER:
 741                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 742                 break;
 743         case I915_PARAM_LAST_DISPATCH:
 744                 value = READ_BREADCRUMB(dev_priv);
 745                 break;
 746         case I915_PARAM_CHIPSET_ID:
 747                 value = dev->pci_device;
 748                 break;
 749         case I915_PARAM_HAS_GEM:
 750                 value = dev_priv->has_gem;
 751                 break;
 752         case I915_PARAM_NUM_FENCES_AVAIL:
 753                 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
 754                 break;
 755         case I915_PARAM_HAS_OVERLAY:
 756                 value = dev_priv->overlay ? 1 : 0;
 757                 break;
 758         case I915_PARAM_HAS_PAGEFLIPPING:
 759                 value = 1;
 760                 break;
 761         case I915_PARAM_HAS_EXECBUF2:
 762                 /* depends on GEM */
 763                 value = dev_priv->has_gem;
 764                 break;
 765         case I915_PARAM_HAS_BSD:
 766                 value = HAS_BSD(dev);
 767                 break;
 768         case I915_PARAM_HAS_BLT:
 769                 value = HAS_BLT(dev);
 770                 break;
 771         case I915_PARAM_HAS_COHERENT_RINGS:
 772                 value = 1;
 773                 break;
 774         default:
 775                 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
 776                                  param->param);
 777                 return -EINVAL;
 778         }
 779
 780         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
 781                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 782                 return -EFAULT;
 783         }
 784
 785         return 0;
 786 }
 787
 788 static int i915_setparam(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_setparam_t *param = data;
 793
 794         if (!dev_priv) {
 795                 DRM_ERROR("called with no initialization\n");
 796                 return -EINVAL;
 797         }
 798
 799         switch (param->param) {
 800         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 801                 break;
 802         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 803                 dev_priv->tex_lru_log_granularity = param->value;
 804                 break;
 805         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 806                 dev_priv->allow_batchbuffer = param->value;
 807                 break;
 808         case I915_SETPARAM_NUM_USED_FENCES:
 809                 if (param->value > dev_priv->num_fence_regs ||
 810                     param->value < 0)
 811                         return -EINVAL;
 812                 /* Userspace can use first N regs */
 813                 dev_priv->fence_reg_start = param->value;
 814                 break;
 815         default:
 816                 DRM_DEBUG_DRIVER("unknown parameter %d\n",
 817                                         param->param);
 818                 return -EINVAL;
 819         }
 820
 821         return 0;
 822 }
 823
 824 static int i915_set_status_page(struct drm_device *dev, void *data,
 825                                 struct drm_file *file_priv)
 826 {
 827         drm_i915_private_t *dev_priv = dev->dev_private;
 828         drm_i915_hws_addr_t *hws = data;
 829         struct intel_ring_buffer *ring = &dev_priv->render_ring;
 830
 831         if (!I915_NEED_GFX_HWS(dev))
 832                 return -EINVAL;
 833
 834         if (!dev_priv) {
 835                 DRM_ERROR("called with no initialization\n");
 836                 return -EINVAL;
 837         }
 838
 839         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 840                 WARN(1, "tried to set status page when mode setting active\n");
 841                 return 0;
 842         }
 843
 844         DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
 845
 846         ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12);
 847
 848         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 849         dev_priv->hws_map.size = 4*1024;
 850         dev_priv->hws_map.type = 0;
 851         dev_priv->hws_map.flags = 0;
 852         dev_priv->hws_map.mtrr = 0;
 853
 854         drm_core_ioremap_wc(&dev_priv->hws_map, dev);
 855         if (dev_priv->hws_map.handle == NULL) {
 856                 i915_dma_cleanup(dev);
 857                 ring->status_page.gfx_addr = 0;
 858                 DRM_ERROR("can not ioremap virtual address for"
 859                                 " G33 hw status page\n");
 860                 return -ENOMEM;
 861         }
 862         ring->status_page.page_addr = dev_priv->hws_map.handle;
 863         memset(ring->status_page.page_addr, 0, PAGE_SIZE);
 864         I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
 865
 866         DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
 867                          ring->status_page.gfx_addr);
 868         DRM_DEBUG_DRIVER("load hws at %p\n",
 869                          ring->status_page.page_addr);
 870         return 0;
 871 }
 872
 873 static int i915_get_bridge_dev(struct drm_device *dev)
 874 {
 875         struct drm_i915_private *dev_priv = dev->dev_private;
 876
 877         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 878         if (!dev_priv->bridge_dev) {
 879                 DRM_ERROR("bridge device not found\n");
 880                 return -1;
 881         }
 882         return 0;
 883 }
 884
 885 #define MCHBAR_I915 0x44
 886 #define MCHBAR_I965 0x48
 887 #define MCHBAR_SIZE (4*4096)
 888
 889 #define DEVEN_REG 0x54
 890 #define   DEVEN_MCHBAR_EN (1 << 28)
 891
 892 /* Allocate space for the MCH regs if needed, return nonzero on error */
 893 static int
 894 intel_alloc_mchbar_resource(struct drm_device *dev)
 895 {
 896         drm_i915_private_t *dev_priv = dev->dev_private;
 897         int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 898         u32 temp_lo, temp_hi = 0;
 899         u64 mchbar_addr;
 900         int ret;
 901
 902         if (INTEL_INFO(dev)->gen >= 4)
 903                 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
 904         pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
 905         mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
 906
 907         /* If ACPI doesn't have it, assume we need to allocate it ourselves */
 908 #ifdef CONFIG_PNP
 909         if (mchbar_addr &&
 910             pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
 911                 return 0;
 912 #endif
 913
 914         /* Get some space for it */
 915         dev_priv->mch_res.name = "i915 MCHBAR";
 916         dev_priv->mch_res.flags = IORESOURCE_MEM;
 917         ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
 918                                      &dev_priv->mch_res,
 919                                      MCHBAR_SIZE, MCHBAR_SIZE,
 920                                      PCIBIOS_MIN_MEM,
 921                                      0, pcibios_align_resource,
 922                                      dev_priv->bridge_dev);
 923         if (ret) {
 924                 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
 925                 dev_priv->mch_res.start = 0;
 926                 return ret;
 927         }
 928
 929         if (INTEL_INFO(dev)->gen >= 4)
 930                 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
 931                                        upper_32_bits(dev_priv->mch_res.start));
 932
 933         pci_write_config_dword(dev_priv->bridge_dev, reg,
 934                                lower_32_bits(dev_priv->mch_res.start));
 935         return 0;
 936 }
 937
 938 /* Setup MCHBAR if possible, return true if we should disable it again */
 939 static void
 940 intel_setup_mchbar(struct drm_device *dev)
 941 {
 942         drm_i915_private_t *dev_priv = dev->dev_private;
 943         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 944         u32 temp;
 945         bool enabled;
 946
 947         dev_priv->mchbar_need_disable = false;
 948
 949         if (IS_I915G(dev) || IS_I915GM(dev)) {
 950                 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
 951                 enabled = !!(temp & DEVEN_MCHBAR_EN);
 952         } else {
 953                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 954                 enabled = temp & 1;
 955         }
 956
 957         /* If it's already enabled, don't have to do anything */
 958         if (enabled)
 959                 return;
 960
 961         if (intel_alloc_mchbar_resource(dev))
 962                 return;
 963
 964         dev_priv->mchbar_need_disable = true;
 965
 966         /* Space is allocated or reserved, so enable it. */
 967         if (IS_I915G(dev) || IS_I915GM(dev)) {
 968                 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
 969                                        temp | DEVEN_MCHBAR_EN);
 970         } else {
 971                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 972                 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
 973         }
 974 }
 975
 976 static void
 977 intel_teardown_mchbar(struct drm_device *dev)
 978 {
 979         drm_i915_private_t *dev_priv = dev->dev_private;
 980         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 981         u32 temp;
 982
 983         if (dev_priv->mchbar_need_disable) {
 984                 if (IS_I915G(dev) || IS_I915GM(dev)) {
 985                         pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
 986                         temp &= ~DEVEN_MCHBAR_EN;
 987                         pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
 988                 } else {
 989                         pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 990                         temp &= ~1;
 991                         pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
 992                 }
 993         }
 994
 995         if (dev_priv->mch_res.start)
 996                 release_resource(&dev_priv->mch_res);
 997 }
 998
 999 #define PTE_ADDRESS_MASK                0xfffff000
1000 #define PTE_ADDRESS_MASK_HIGH           0x000000f0 /* i915+ */
1001 #define PTE_MAPPING_TYPE_UNCACHED       (0 << 1)
1002 #define PTE_MAPPING_TYPE_DCACHE         (1 << 1) /* i830 only */
1003 #define PTE_MAPPING_TYPE_CACHED         (3 << 1)
1004 #define PTE_MAPPING_TYPE_MASK           (3 << 1)
1005 #define PTE_VALID                       (1 << 0)
1006
1007 /**
1008  * i915_gtt_to_phys - take a GTT address and turn it into a physical one
1009  * @dev: drm device
1010  * @gtt_addr: address to translate
1011  *
1012  * Some chip functions require allocations from stolen space but need the
1013  * physical address of the memory in question.  We use this routine
1014  * to get a physical address suitable for register programming from a given
1015  * GTT address.
1016  */
1017 static unsigned long i915_gtt_to_phys(struct drm_device *dev,
1018                                       unsigned long gtt_addr)
1019 {
1020         unsigned long *gtt;
1021         unsigned long entry, phys;
1022         int gtt_bar = IS_GEN2(dev) ? 1 : 0;
1023         int gtt_offset, gtt_size;
1024
1025         if (INTEL_INFO(dev)->gen >= 4) {
1026                 if (IS_G4X(dev) || INTEL_INFO(dev)->gen > 4) {
1027                         gtt_offset = 2*1024*1024;
1028                         gtt_size = 2*1024*1024;
1029                 } else {
1030                         gtt_offset = 512*1024;
1031                         gtt_size = 512*1024;
1032                 }
1033         } else {
1034                 gtt_bar = 3;
1035                 gtt_offset = 0;
1036                 gtt_size = pci_resource_len(dev->pdev, gtt_bar);
1037         }
1038
1039         gtt = ioremap_wc(pci_resource_start(dev->pdev, gtt_bar) + gtt_offset,
1040                          gtt_size);
1041         if (!gtt) {
1042                 DRM_ERROR("ioremap of GTT failed\n");
1043                 return 0;
1044         }
1045
1046         entry = *(volatile u32 *)(gtt + (gtt_addr / 1024));
1047
1048         DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, PTE: 0x%08lx\n", gtt_addr, entry);
1049
1050         /* Mask out these reserved bits on this hardware. */
1051         if (INTEL_INFO(dev)->gen < 4 && !IS_G33(dev))
1052                 entry &= ~PTE_ADDRESS_MASK_HIGH;
1053
1054         /* If it's not a mapping type we know, then bail. */
1055         if ((entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_UNCACHED &&
1056             (entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_CACHED) {
1057                 iounmap(gtt);
1058                 return 0;
1059         }
1060
1061         if (!(entry & PTE_VALID)) {
1062                 DRM_ERROR("bad GTT entry in stolen space\n");
1063                 iounmap(gtt);
1064                 return 0;
1065         }
1066
1067         iounmap(gtt);
1068
1069         phys =(entry & PTE_ADDRESS_MASK) |
1070                 ((uint64_t)(entry & PTE_ADDRESS_MASK_HIGH) << (32 - 4));
1071
1072         DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, phys addr: 0x%08lx\n", gtt_addr, phys);
1073
1074         return phys;
1075 }
1076
1077 static void i915_warn_stolen(struct drm_device *dev)
1078 {
1079         DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1080         DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1081 }
1082
1083 static void i915_setup_compression(struct drm_device *dev, int size)
1084 {
1085         struct drm_i915_private *dev_priv = dev->dev_private;
1086         struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb);
1087         unsigned long cfb_base;
1088         unsigned long ll_base = 0;
1089
1090         /* Leave 1M for line length buffer & misc. */
1091         compressed_fb = drm_mm_search_free(&dev_priv->mm.vram, size, 4096, 0);
1092         if (!compressed_fb) {
1093                 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1094                 i915_warn_stolen(dev);
1095                 return;
1096         }
1097
1098         compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1099         if (!compressed_fb) {
1100                 i915_warn_stolen(dev);
1101                 dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1102                 return;
1103         }
1104
1105         cfb_base = i915_gtt_to_phys(dev, compressed_fb->start);
1106         if (!cfb_base) {
1107                 DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1108                 drm_mm_put_block(compressed_fb);
1109         }
1110
1111         if (!(IS_GM45(dev) || IS_IRONLAKE_M(dev))) {
1112                 compressed_llb = drm_mm_search_free(&dev_priv->mm.vram, 4096,
1113                                                     4096, 0);
1114                 if (!compressed_llb) {
1115                         i915_warn_stolen(dev);
1116                         return;
1117                 }
1118
1119                 compressed_llb = drm_mm_get_block(compressed_llb, 4096, 4096);
1120                 if (!compressed_llb) {
1121                         i915_warn_stolen(dev);
1122                         return;
1123                 }
1124
1125                 ll_base = i915_gtt_to_phys(dev, compressed_llb->start);
1126                 if (!ll_base) {
1127                         DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1128                         drm_mm_put_block(compressed_fb);
1129                         drm_mm_put_block(compressed_llb);
1130                 }
1131         }
1132
1133         dev_priv->cfb_size = size;
1134
1135         intel_disable_fbc(dev);
1136         dev_priv->compressed_fb = compressed_fb;
1137         if (IS_IRONLAKE_M(dev))
1138                 I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start);
1139         else if (IS_GM45(dev)) {
1140                 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1141         } else {
1142                 I915_WRITE(FBC_CFB_BASE, cfb_base);
1143                 I915_WRITE(FBC_LL_BASE, ll_base);
1144                 dev_priv->compressed_llb = compressed_llb;
1145         }
1146
1147         DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", cfb_base,
1148                   ll_base, size >> 20);
1149 }
1150
1151 static void i915_cleanup_compression(struct drm_device *dev)
1152 {
1153         struct drm_i915_private *dev_priv = dev->dev_private;
1154
1155         drm_mm_put_block(dev_priv->compressed_fb);
1156         if (dev_priv->compressed_llb)
1157                 drm_mm_put_block(dev_priv->compressed_llb);
1158 }
1159
1160 /* true = enable decode, false = disable decoder */
1161 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1162 {
1163         struct drm_device *dev = cookie;
1164
1165         intel_modeset_vga_set_state(dev, state);
1166         if (state)
1167                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1168                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1169         else
1170                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1171 }
1172
1173 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1174 {
1175         struct drm_device *dev = pci_get_drvdata(pdev);
1176         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
1177         if (state == VGA_SWITCHEROO_ON) {
1178                 printk(KERN_INFO "i915: switched on\n");
1179                 /* i915 resume handler doesn't set to D0 */
1180                 pci_set_power_state(dev->pdev, PCI_D0);
1181                 i915_resume(dev);
1182         } else {
1183                 printk(KERN_ERR "i915: switched off\n");
1184                 i915_suspend(dev, pmm);
1185         }
1186 }
1187
1188 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
1189 {
1190         struct drm_device *dev = pci_get_drvdata(pdev);
1191         bool can_switch;
1192
1193         spin_lock(&dev->count_lock);
1194         can_switch = (dev->open_count == 0);
1195         spin_unlock(&dev->count_lock);
1196         return can_switch;
1197 }
1198
1199 static int i915_load_modeset_init(struct drm_device *dev,
1200                                   unsigned long prealloc_size,
1201                                   unsigned long agp_size)
1202 {
1203         struct drm_i915_private *dev_priv = dev->dev_private;
1204         int ret = 0;
1205
1206         /* Basic memrange allocator for stolen space (aka mm.vram) */
1207         drm_mm_init(&dev_priv->mm.vram, 0, prealloc_size);
1208
1209         /* Let GEM Manage from end of prealloc space to end of aperture.
1210          *
1211          * However, leave one page at the end still bound to the scratch page.
1212          * There are a number of places where the hardware apparently
1213          * prefetches past the end of the object, and we've seen multiple
1214          * hangs with the GPU head pointer stuck in a batchbuffer bound
1215          * at the last page of the aperture.  One page should be enough to
1216          * keep any prefetching inside of the aperture.
1217          */
1218         i915_gem_do_init(dev, prealloc_size, agp_size - 4096);
1219
1220         mutex_lock(&dev->struct_mutex);
1221         ret = i915_gem_init_ringbuffer(dev);
1222         mutex_unlock(&dev->struct_mutex);
1223         if (ret)
1224                 goto out;
1225
1226         /* Try to set up FBC with a reasonable compressed buffer size */
1227         if (I915_HAS_FBC(dev) && i915_powersave) {
1228                 int cfb_size;
1229
1230                 /* Try to get an 8M buffer... */
1231                 if (prealloc_size > (9*1024*1024))
1232                         cfb_size = 8*1024*1024;
1233                 else /* fall back to 7/8 of the stolen space */
1234                         cfb_size = prealloc_size * 7 / 8;
1235                 i915_setup_compression(dev, cfb_size);
1236         }
1237
1238         /* Allow hardware batchbuffers unless told otherwise.
1239          */
1240         dev_priv->allow_batchbuffer = 1;
1241
1242         ret = intel_parse_bios(dev);
1243         if (ret)
1244                 DRM_INFO("failed to find VBIOS tables\n");
1245
1246         /* if we have > 1 VGA cards, then disable the radeon VGA resources */
1247         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1248         if (ret)
1249                 goto cleanup_ringbuffer;
1250
1251         intel_register_dsm_handler();
1252
1253         ret = vga_switcheroo_register_client(dev->pdev,
1254                                              i915_switcheroo_set_state,
1255                                              i915_switcheroo_can_switch);
1256         if (ret)
1257                 goto cleanup_vga_client;
1258
1259         /* IIR "flip pending" bit means done if this bit is set */
1260         if (IS_GEN3(dev) && (I915_READ(ECOSKPD) & ECO_FLIP_DONE))
1261                 dev_priv->flip_pending_is_done = true;
1262
1263         intel_modeset_init(dev);
1264
1265         ret = drm_irq_install(dev);
1266         if (ret)
1267                 goto cleanup_vga_switcheroo;
1268
1269         /* Always safe in the mode setting case. */
1270         /* FIXME: do pre/post-mode set stuff in core KMS code */
1271         dev->vblank_disable_allowed = 1;
1272
1273         ret = intel_fbdev_init(dev);
1274         if (ret)
1275                 goto cleanup_irq;
1276
1277         drm_kms_helper_poll_init(dev);
1278
1279         /* We're off and running w/KMS */
1280         dev_priv->mm.suspended = 0;
1281
1282         return 0;
1283
1284 cleanup_irq:
1285         drm_irq_uninstall(dev);
1286 cleanup_vga_switcheroo:
1287         vga_switcheroo_unregister_client(dev->pdev);
1288 cleanup_vga_client:
1289         vga_client_register(dev->pdev, NULL, NULL, NULL);
1290 cleanup_ringbuffer:
1291         mutex_lock(&dev->struct_mutex);
1292         i915_gem_cleanup_ringbuffer(dev);
1293         mutex_unlock(&dev->struct_mutex);
1294 out:
1295         return ret;
1296 }
1297
1298 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1299 {
1300         struct drm_i915_master_private *master_priv;
1301
1302         master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1303         if (!master_priv)
1304                 return -ENOMEM;
1305
1306         master->driver_priv = master_priv;
1307         return 0;
1308 }
1309
1310 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1311 {
1312         struct drm_i915_master_private *master_priv = master->driver_priv;
1313
1314         if (!master_priv)
1315                 return;
1316
1317         kfree(master_priv);
1318
1319         master->driver_priv = NULL;
1320 }
1321
1322 static void i915_pineview_get_mem_freq(struct drm_device *dev)
1323 {
1324         drm_i915_private_t *dev_priv = dev->dev_private;
1325         u32 tmp;
1326
1327         tmp = I915_READ(CLKCFG);
1328
1329         switch (tmp & CLKCFG_FSB_MASK) {
1330         case CLKCFG_FSB_533:
1331                 dev_priv->fsb_freq = 533; /* 133*4 */
1332                 break;
1333         case CLKCFG_FSB_800:
1334                 dev_priv->fsb_freq = 800; /* 200*4 */
1335                 break;
1336         case CLKCFG_FSB_667:
1337                 dev_priv->fsb_freq =  667; /* 167*4 */
1338                 break;
1339         case CLKCFG_FSB_400:
1340                 dev_priv->fsb_freq = 400; /* 100*4 */
1341                 break;
1342         }
1343
1344         switch (tmp & CLKCFG_MEM_MASK) {
1345         case CLKCFG_MEM_533:
1346                 dev_priv->mem_freq = 533;
1347                 break;
1348         case CLKCFG_MEM_667:
1349                 dev_priv->mem_freq = 667;
1350                 break;
1351         case CLKCFG_MEM_800:
1352                 dev_priv->mem_freq = 800;
1353                 break;
1354         }
1355
1356         /* detect pineview DDR3 setting */
1357         tmp = I915_READ(CSHRDDR3CTL);
1358         dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
1359 }
1360
1361 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
1362 {
1363         drm_i915_private_t *dev_priv = dev->dev_private;
1364         u16 ddrpll, csipll;
1365
1366         ddrpll = I915_READ16(DDRMPLL1);
1367         csipll = I915_READ16(CSIPLL0);
1368
1369         switch (ddrpll & 0xff) {
1370         case 0xc:
1371                 dev_priv->mem_freq = 800;
1372                 break;
1373         case 0x10:
1374                 dev_priv->mem_freq = 1066;
1375                 break;
1376         case 0x14:
1377                 dev_priv->mem_freq = 1333;
1378                 break;
1379         case 0x18:
1380                 dev_priv->mem_freq = 1600;
1381                 break;
1382         default:
1383                 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
1384                                  ddrpll & 0xff);
1385                 dev_priv->mem_freq = 0;
1386                 break;
1387         }
1388
1389         dev_priv->r_t = dev_priv->mem_freq;
1390
1391         switch (csipll & 0x3ff) {
1392         case 0x00c:
1393                 dev_priv->fsb_freq = 3200;
1394                 break;
1395         case 0x00e:
1396                 dev_priv->fsb_freq = 3733;
1397                 break;
1398         case 0x010:
1399                 dev_priv->fsb_freq = 4266;
1400                 break;
1401         case 0x012:
1402                 dev_priv->fsb_freq = 4800;
1403                 break;
1404         case 0x014:
1405                 dev_priv->fsb_freq = 5333;
1406                 break;
1407         case 0x016:
1408                 dev_priv->fsb_freq = 5866;
1409                 break;
1410         case 0x018:
1411                 dev_priv->fsb_freq = 6400;
1412                 break;
1413         default:
1414                 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
1415                                  csipll & 0x3ff);
1416                 dev_priv->fsb_freq = 0;
1417                 break;
1418         }
1419
1420         if (dev_priv->fsb_freq == 3200) {
1421                 dev_priv->c_m = 0;
1422         } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
1423                 dev_priv->c_m = 1;
1424         } else {
1425                 dev_priv->c_m = 2;
1426         }
1427 }
1428
1429 struct v_table {
1430         u8 vid;
1431         unsigned long vd; /* in .1 mil */
1432         unsigned long vm; /* in .1 mil */
1433         u8 pvid;
1434 };
1435
1436 static struct v_table v_table[] = {
1437         { 0, 16125, 15000, 0x7f, },
1438         { 1, 16000, 14875, 0x7e, },
1439         { 2, 15875, 14750, 0x7d, },
1440         { 3, 15750, 14625, 0x7c, },
1441         { 4, 15625, 14500, 0x7b, },
1442         { 5, 15500, 14375, 0x7a, },
1443         { 6, 15375, 14250, 0x79, },
1444         { 7, 15250, 14125, 0x78, },
1445         { 8, 15125, 14000, 0x77, },
1446         { 9, 15000, 13875, 0x76, },
1447         { 10, 14875, 13750, 0x75, },
1448         { 11, 14750, 13625, 0x74, },
1449         { 12, 14625, 13500, 0x73, },
1450         { 13, 14500, 13375, 0x72, },
1451         { 14, 14375, 13250, 0x71, },
1452         { 15, 14250, 13125, 0x70, },
1453         { 16, 14125, 13000, 0x6f, },
1454         { 17, 14000, 12875, 0x6e, },
1455         { 18, 13875, 12750, 0x6d, },
1456         { 19, 13750, 12625, 0x6c, },
1457         { 20, 13625, 12500, 0x6b, },
1458         { 21, 13500, 12375, 0x6a, },
1459         { 22, 13375, 12250, 0x69, },
1460         { 23, 13250, 12125, 0x68, },
1461         { 24, 13125, 12000, 0x67, },
1462         { 25, 13000, 11875, 0x66, },
1463         { 26, 12875, 11750, 0x65, },
1464         { 27, 12750, 11625, 0x64, },
1465         { 28, 12625, 11500, 0x63, },
1466         { 29, 12500, 11375, 0x62, },
1467         { 30, 12375, 11250, 0x61, },
1468         { 31, 12250, 11125, 0x60, },
1469         { 32, 12125, 11000, 0x5f, },
1470         { 33, 12000, 10875, 0x5e, },
1471         { 34, 11875, 10750, 0x5d, },
1472         { 35, 11750, 10625, 0x5c, },
1473         { 36, 11625, 10500, 0x5b, },
1474         { 37, 11500, 10375, 0x5a, },
1475         { 38, 11375, 10250, 0x59, },
1476         { 39, 11250, 10125, 0x58, },
1477         { 40, 11125, 10000, 0x57, },
1478         { 41, 11000, 9875, 0x56, },
1479         { 42, 10875, 9750, 0x55, },
1480         { 43, 10750, 9625, 0x54, },
1481         { 44, 10625, 9500, 0x53, },
1482         { 45, 10500, 9375, 0x52, },
1483         { 46, 10375, 9250, 0x51, },
1484         { 47, 10250, 9125, 0x50, },
1485         { 48, 10125, 9000, 0x4f, },
1486         { 49, 10000, 8875, 0x4e, },
1487         { 50, 9875, 8750, 0x4d, },
1488         { 51, 9750, 8625, 0x4c, },
1489         { 52, 9625, 8500, 0x4b, },
1490         { 53, 9500, 8375, 0x4a, },
1491         { 54, 9375, 8250, 0x49, },
1492         { 55, 9250, 8125, 0x48, },
1493         { 56, 9125, 8000, 0x47, },
1494         { 57, 9000, 7875, 0x46, },
1495         { 58, 8875, 7750, 0x45, },
1496         { 59, 8750, 7625, 0x44, },
1497         { 60, 8625, 7500, 0x43, },
1498         { 61, 8500, 7375, 0x42, },
1499         { 62, 8375, 7250, 0x41, },
1500         { 63, 8250, 7125, 0x40, },
1501         { 64, 8125, 7000, 0x3f, },
1502         { 65, 8000, 6875, 0x3e, },
1503         { 66, 7875, 6750, 0x3d, },
1504         { 67, 7750, 6625, 0x3c, },
1505         { 68, 7625, 6500, 0x3b, },
1506         { 69, 7500, 6375, 0x3a, },
1507         { 70, 7375, 6250, 0x39, },
1508         { 71, 7250, 6125, 0x38, },
1509         { 72, 7125, 6000, 0x37, },
1510         { 73, 7000, 5875, 0x36, },
1511         { 74, 6875, 5750, 0x35, },
1512         { 75, 6750, 5625, 0x34, },
1513         { 76, 6625, 5500, 0x33, },
1514         { 77, 6500, 5375, 0x32, },
1515         { 78, 6375, 5250, 0x31, },
1516         { 79, 6250, 5125, 0x30, },
1517         { 80, 6125, 5000, 0x2f, },
1518         { 81, 6000, 4875, 0x2e, },
1519         { 82, 5875, 4750, 0x2d, },
1520         { 83, 5750, 4625, 0x2c, },
1521         { 84, 5625, 4500, 0x2b, },
1522         { 85, 5500, 4375, 0x2a, },
1523         { 86, 5375, 4250, 0x29, },
1524         { 87, 5250, 4125, 0x28, },
1525         { 88, 5125, 4000, 0x27, },
1526         { 89, 5000, 3875, 0x26, },
1527         { 90, 4875, 3750, 0x25, },
1528         { 91, 4750, 3625, 0x24, },
1529         { 92, 4625, 3500, 0x23, },
1530         { 93, 4500, 3375, 0x22, },
1531         { 94, 4375, 3250, 0x21, },
1532         { 95, 4250, 3125, 0x20, },
1533         { 96, 4125, 3000, 0x1f, },
1534         { 97, 4125, 3000, 0x1e, },
1535         { 98, 4125, 3000, 0x1d, },
1536         { 99, 4125, 3000, 0x1c, },
1537         { 100, 4125, 3000, 0x1b, },
1538         { 101, 4125, 3000, 0x1a, },
1539         { 102, 4125, 3000, 0x19, },
1540         { 103, 4125, 3000, 0x18, },
1541         { 104, 4125, 3000, 0x17, },
1542         { 105, 4125, 3000, 0x16, },
1543         { 106, 4125, 3000, 0x15, },
1544         { 107, 4125, 3000, 0x14, },
1545         { 108, 4125, 3000, 0x13, },
1546         { 109, 4125, 3000, 0x12, },
1547         { 110, 4125, 3000, 0x11, },
1548         { 111, 4125, 3000, 0x10, },
1549         { 112, 4125, 3000, 0x0f, },
1550         { 113, 4125, 3000, 0x0e, },
1551         { 114, 4125, 3000, 0x0d, },
1552         { 115, 4125, 3000, 0x0c, },
1553         { 116, 4125, 3000, 0x0b, },
1554         { 117, 4125, 3000, 0x0a, },
1555         { 118, 4125, 3000, 0x09, },
1556         { 119, 4125, 3000, 0x08, },
1557         { 120, 1125, 0, 0x07, },
1558         { 121, 1000, 0, 0x06, },
1559         { 122, 875, 0, 0x05, },
1560         { 123, 750, 0, 0x04, },
1561         { 124, 625, 0, 0x03, },
1562         { 125, 500, 0, 0x02, },
1563         { 126, 375, 0, 0x01, },
1564         { 127, 0, 0, 0x00, },
1565 };
1566
1567 struct cparams {
1568         int i;
1569         int t;
1570         int m;
1571         int c;
1572 };
1573
1574 static struct cparams cparams[] = {
1575         { 1, 1333, 301, 28664 },
1576         { 1, 1066, 294, 24460 },
1577         { 1, 800, 294, 25192 },
1578         { 0, 1333, 276, 27605 },
1579         { 0, 1066, 276, 27605 },
1580         { 0, 800, 231, 23784 },
1581 };
1582
1583 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
1584 {
1585         u64 total_count, diff, ret;
1586         u32 count1, count2, count3, m = 0, c = 0;
1587         unsigned long now = jiffies_to_msecs(jiffies), diff1;
1588         int i;
1589
1590         diff1 = now - dev_priv->last_time1;
1591
1592         count1 = I915_READ(DMIEC);
1593         count2 = I915_READ(DDREC);
1594         count3 = I915_READ(CSIEC);
1595
1596         total_count = count1 + count2 + count3;
1597
1598         /* FIXME: handle per-counter overflow */
1599         if (total_count < dev_priv->last_count1) {
1600                 diff = ~0UL - dev_priv->last_count1;
1601                 diff += total_count;
1602         } else {
1603                 diff = total_count - dev_priv->last_count1;
1604         }
1605
1606         for (i = 0; i < ARRAY_SIZE(cparams); i++) {
1607                 if (cparams[i].i == dev_priv->c_m &&
1608                     cparams[i].t == dev_priv->r_t) {
1609                         m = cparams[i].m;
1610                         c = cparams[i].c;
1611                         break;
1612                 }
1613         }
1614
1615         diff = div_u64(diff, diff1);
1616         ret = ((m * diff) + c);
1617         ret = div_u64(ret, 10);
1618
1619         dev_priv->last_count1 = total_count;
1620         dev_priv->last_time1 = now;
1621
1622         return ret;
1623 }
1624
1625 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
1626 {
1627         unsigned long m, x, b;
1628         u32 tsfs;
1629
1630         tsfs = I915_READ(TSFS);
1631
1632         m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
1633         x = I915_READ8(TR1);
1634
1635         b = tsfs & TSFS_INTR_MASK;
1636
1637         return ((m * x) / 127) - b;
1638 }
1639
1640 static unsigned long pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
1641 {
1642         unsigned long val = 0;
1643         int i;
1644
1645         for (i = 0; i < ARRAY_SIZE(v_table); i++) {
1646                 if (v_table[i].pvid == pxvid) {
1647                         if (IS_MOBILE(dev_priv->dev))
1648                                 val = v_table[i].vm;
1649                         else
1650                                 val = v_table[i].vd;
1651                 }
1652         }
1653
1654         return val;
1655 }
1656
1657 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
1658 {
1659         struct timespec now, diff1;
1660         u64 diff;
1661         unsigned long diffms;
1662         u32 count;
1663
1664         getrawmonotonic(&now);
1665         diff1 = timespec_sub(now, dev_priv->last_time2);
1666
1667         /* Don't divide by 0 */
1668         diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
1669         if (!diffms)
1670                 return;
1671
1672         count = I915_READ(GFXEC);
1673
1674         if (count < dev_priv->last_count2) {
1675                 diff = ~0UL - dev_priv->last_count2;
1676                 diff += count;
1677         } else {
1678                 diff = count - dev_priv->last_count2;
1679         }
1680
1681         dev_priv->last_count2 = count;
1682         dev_priv->last_time2 = now;
1683
1684         /* More magic constants... */
1685         diff = diff * 1181;
1686         diff = div_u64(diff, diffms * 10);
1687         dev_priv->gfx_power = diff;
1688 }
1689
1690 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
1691 {
1692         unsigned long t, corr, state1, corr2, state2;
1693         u32 pxvid, ext_v;
1694
1695         pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->cur_delay * 4));
1696         pxvid = (pxvid >> 24) & 0x7f;
1697         ext_v = pvid_to_extvid(dev_priv, pxvid);
1698
1699         state1 = ext_v;
1700
1701         t = i915_mch_val(dev_priv);
1702
1703         /* Revel in the empirically derived constants */
1704
1705         /* Correction factor in 1/100000 units */
1706         if (t > 80)
1707                 corr = ((t * 2349) + 135940);
1708         else if (t >= 50)
1709                 corr = ((t * 964) + 29317);
1710         else /* < 50 */
1711                 corr = ((t * 301) + 1004);
1712
1713         corr = corr * ((150142 * state1) / 10000 - 78642);
1714         corr /= 100000;
1715         corr2 = (corr * dev_priv->corr);
1716
1717         state2 = (corr2 * state1) / 10000;
1718         state2 /= 100; /* convert to mW */
1719
1720         i915_update_gfx_val(dev_priv);
1721
1722         return dev_priv->gfx_power + state2;
1723 }
1724
1725 /* Global for IPS driver to get at the current i915 device */
1726 static struct drm_i915_private *i915_mch_dev;
1727 /*
1728  * Lock protecting IPS related data structures
1729  *   - i915_mch_dev
1730  *   - dev_priv->max_delay
1731  *   - dev_priv->min_delay
1732  *   - dev_priv->fmax
1733  *   - dev_priv->gpu_busy
1734  */
1735 static DEFINE_SPINLOCK(mchdev_lock);
1736
1737 /**
1738  * i915_read_mch_val - return value for IPS use
1739  *
1740  * Calculate and return a value for the IPS driver to use when deciding whether
1741  * we have thermal and power headroom to increase CPU or GPU power budget.
1742  */
1743 unsigned long i915_read_mch_val(void)
1744 {
1745         struct drm_i915_private *dev_priv;
1746         unsigned long chipset_val, graphics_val, ret = 0;
1747
1748         spin_lock(&mchdev_lock);
1749         if (!i915_mch_dev)
1750                 goto out_unlock;
1751         dev_priv = i915_mch_dev;
1752
1753         chipset_val = i915_chipset_val(dev_priv);
1754         graphics_val = i915_gfx_val(dev_priv);
1755
1756         ret = chipset_val + graphics_val;
1757
1758 out_unlock:
1759         spin_unlock(&mchdev_lock);
1760
1761         return ret;
1762 }
1763 EXPORT_SYMBOL_GPL(i915_read_mch_val);
1764
1765 /**
1766  * i915_gpu_raise - raise GPU frequency limit
1767  *
1768  * Raise the limit; IPS indicates we have thermal headroom.
1769  */
1770 bool i915_gpu_raise(void)
1771 {
1772         struct drm_i915_private *dev_priv;
1773         bool ret = true;
1774
1775         spin_lock(&mchdev_lock);
1776         if (!i915_mch_dev) {
1777                 ret = false;
1778                 goto out_unlock;
1779         }
1780         dev_priv = i915_mch_dev;
1781
1782         if (dev_priv->max_delay > dev_priv->fmax)
1783                 dev_priv->max_delay--;
1784
1785 out_unlock:
1786         spin_unlock(&mchdev_lock);
1787
1788         return ret;
1789 }
1790 EXPORT_SYMBOL_GPL(i915_gpu_raise);
1791
1792 /**
1793  * i915_gpu_lower - lower GPU frequency limit
1794  *
1795  * IPS indicates we're close to a thermal limit, so throttle back the GPU
1796  * frequency maximum.
1797  */
1798 bool i915_gpu_lower(void)
1799 {
1800         struct drm_i915_private *dev_priv;
1801         bool ret = true;
1802
1803         spin_lock(&mchdev_lock);
1804         if (!i915_mch_dev) {
1805                 ret = false;
1806                 goto out_unlock;
1807         }
1808         dev_priv = i915_mch_dev;
1809
1810         if (dev_priv->max_delay < dev_priv->min_delay)
1811                 dev_priv->max_delay++;
1812
1813 out_unlock:
1814         spin_unlock(&mchdev_lock);
1815
1816         return ret;
1817 }
1818 EXPORT_SYMBOL_GPL(i915_gpu_lower);
1819
1820 /**
1821  * i915_gpu_busy - indicate GPU business to IPS
1822  *
1823  * Tell the IPS driver whether or not the GPU is busy.
1824  */
1825 bool i915_gpu_busy(void)
1826 {
1827         struct drm_i915_private *dev_priv;
1828         bool ret = false;
1829
1830         spin_lock(&mchdev_lock);
1831         if (!i915_mch_dev)
1832                 goto out_unlock;
1833         dev_priv = i915_mch_dev;
1834
1835         ret = dev_priv->busy;
1836
1837 out_unlock:
1838         spin_unlock(&mchdev_lock);
1839
1840         return ret;
1841 }
1842 EXPORT_SYMBOL_GPL(i915_gpu_busy);
1843
1844 /**
1845  * i915_gpu_turbo_disable - disable graphics turbo
1846  *
1847  * Disable graphics turbo by resetting the max frequency and setting the
1848  * current frequency to the default.
1849  */
1850 bool i915_gpu_turbo_disable(void)
1851 {
1852         struct drm_i915_private *dev_priv;
1853         bool ret = true;
1854
1855         spin_lock(&mchdev_lock);
1856         if (!i915_mch_dev) {
1857                 ret = false;
1858                 goto out_unlock;
1859         }
1860         dev_priv = i915_mch_dev;
1861
1862         dev_priv->max_delay = dev_priv->fstart;
1863
1864         if (!ironlake_set_drps(dev_priv->dev, dev_priv->fstart))
1865                 ret = false;
1866
1867 out_unlock:
1868         spin_unlock(&mchdev_lock);
1869
1870         return ret;
1871 }
1872 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
1873
1874 /**
1875  * Tells the intel_ips driver that the i915 driver is now loaded, if
1876  * IPS got loaded first.
1877  *
1878  * This awkward dance is so that neither module has to depend on the
1879  * other in order for IPS to do the appropriate communication of
1880  * GPU turbo limits to i915.
1881  */
1882 static void
1883 ips_ping_for_i915_load(void)
1884 {
1885         void (*link)(void);
1886
1887         link = symbol_get(ips_link_to_i915_driver);
1888         if (link) {
1889                 link();
1890                 symbol_put(ips_link_to_i915_driver);
1891         }
1892 }
1893
1894 /**
1895  * i915_driver_load - setup chip and create an initial config
1896  * @dev: DRM device
1897  * @flags: startup flags
1898  *
1899  * The driver load routine has to do several things:
1900  *   - drive output discovery via intel_modeset_init()
1901  *   - initialize the memory manager
1902  *   - allocate initial config memory
1903  *   - setup the DRM framebuffer with the allocated memory
1904  */
1905 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1906 {
1907         struct drm_i915_private *dev_priv;
1908         resource_size_t base, size;
1909         int ret = 0, mmio_bar;
1910         uint32_t agp_size, prealloc_size;
1911         /* i915 has 4 more counters */
1912         dev->counters += 4;
1913         dev->types[6] = _DRM_STAT_IRQ;
1914         dev->types[7] = _DRM_STAT_PRIMARY;
1915         dev->types[8] = _DRM_STAT_SECONDARY;
1916         dev->types[9] = _DRM_STAT_DMA;
1917
1918         dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1919         if (dev_priv == NULL)
1920                 return -ENOMEM;
1921
1922         dev->dev_private = (void *)dev_priv;
1923         dev_priv->dev = dev;
1924         dev_priv->info = (struct intel_device_info *) flags;
1925
1926         /* Add register map (needed for suspend/resume) */
1927         mmio_bar = IS_GEN2(dev) ? 1 : 0;
1928         base = pci_resource_start(dev->pdev, mmio_bar);
1929         size = pci_resource_len(dev->pdev, mmio_bar);
1930
1931         if (i915_get_bridge_dev(dev)) {
1932                 ret = -EIO;
1933                 goto free_priv;
1934         }
1935
1936         /* overlay on gen2 is broken and can't address above 1G */
1937         if (IS_GEN2(dev))
1938                 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
1939
1940         dev_priv->regs = ioremap(base, size);
1941         if (!dev_priv->regs) {
1942                 DRM_ERROR("failed to map registers\n");
1943                 ret = -EIO;
1944                 goto put_bridge;
1945         }
1946
1947         dev_priv->mm.gtt_mapping =
1948                 io_mapping_create_wc(dev->agp->base,
1949                                      dev->agp->agp_info.aper_size * 1024*1024);
1950         if (dev_priv->mm.gtt_mapping == NULL) {
1951                 ret = -EIO;
1952                 goto out_rmmap;
1953         }
1954
1955         /* Set up a WC MTRR for non-PAT systems.  This is more common than
1956          * one would think, because the kernel disables PAT on first
1957          * generation Core chips because WC PAT gets overridden by a UC
1958          * MTRR if present.  Even if a UC MTRR isn't present.
1959          */
1960         dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1961                                          dev->agp->agp_info.aper_size *
1962                                          1024 * 1024,
1963                                          MTRR_TYPE_WRCOMB, 1);
1964         if (dev_priv->mm.gtt_mtrr < 0) {
1965                 DRM_INFO("MTRR allocation failed.  Graphics "
1966                          "performance may suffer.\n");
1967         }
1968
1969         dev_priv->mm.gtt = intel_gtt_get();
1970         if (!dev_priv->mm.gtt) {
1971                 DRM_ERROR("Failed to initialize GTT\n");
1972                 ret = -ENODEV;
1973                 goto out_iomapfree;
1974         }
1975
1976         prealloc_size = dev_priv->mm.gtt->gtt_stolen_entries << PAGE_SHIFT;
1977         agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1978
1979         /* The i915 workqueue is primarily used for batched retirement of
1980          * requests (and thus managing bo) once the task has been completed
1981          * by the GPU. i915_gem_retire_requests() is called directly when we
1982          * need high-priority retirement, such as waiting for an explicit
1983          * bo.
1984          *
1985          * It is also used for periodic low-priority events, such as
1986          * idle-timers and hangcheck.
1987          *
1988          * All tasks on the workqueue are expected to acquire the dev mutex
1989          * so there is no point in running more than one instance of the
1990          * workqueue at any time: max_active = 1 and NON_REENTRANT.
1991          */
1992         dev_priv->wq = alloc_workqueue("i915",
1993                                        WQ_UNBOUND | WQ_NON_REENTRANT,
1994                                        1);
1995         if (dev_priv->wq == NULL) {
1996                 DRM_ERROR("Failed to create our workqueue.\n");
1997                 ret = -ENOMEM;
1998                 goto out_iomapfree;
1999         }
2000
2001         /* enable GEM by default */
2002         dev_priv->has_gem = 1;
2003
2004         if (prealloc_size > agp_size * 3 / 4) {
2005                 DRM_ERROR("Detected broken video BIOS with %d/%dkB of video "
2006                           "memory stolen.\n",
2007                           prealloc_size / 1024, agp_size / 1024);
2008                 DRM_ERROR("Disabling GEM. (try reducing stolen memory or "
2009                           "updating the BIOS to fix).\n");
2010                 dev_priv->has_gem = 0;
2011         }
2012
2013         if (dev_priv->has_gem == 0 &&
2014             drm_core_check_feature(dev, DRIVER_MODESET)) {
2015                 DRM_ERROR("kernel modesetting requires GEM, disabling driver.\n");
2016                 ret = -ENODEV;
2017                 goto out_iomapfree;
2018         }
2019
2020         dev->driver->get_vblank_counter = i915_get_vblank_counter;
2021         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
2022         if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev)) {
2023                 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
2024                 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
2025         }
2026
2027         /* Try to make sure MCHBAR is enabled before poking at it */
2028         intel_setup_mchbar(dev);
2029         intel_setup_gmbus(dev);
2030         intel_opregion_setup(dev);
2031
2032         /* Make sure the bios did its job and set up vital registers */
2033         intel_setup_bios(dev);
2034
2035         i915_gem_load(dev);
2036
2037         /* Init HWS */
2038         if (!I915_NEED_GFX_HWS(dev)) {
2039                 ret = i915_init_phys_hws(dev);
2040                 if (ret != 0)
2041                         goto out_workqueue_free;
2042         }
2043
2044         if (IS_PINEVIEW(dev))
2045                 i915_pineview_get_mem_freq(dev);
2046         else if (IS_GEN5(dev))
2047                 i915_ironlake_get_mem_freq(dev);
2048
2049         /* On the 945G/GM, the chipset reports the MSI capability on the
2050          * integrated graphics even though the support isn't actually there
2051          * according to the published specs.  It doesn't appear to function
2052          * correctly in testing on 945G.
2053          * This may be a side effect of MSI having been made available for PEG
2054          * and the registers being closely associated.
2055          *
2056          * According to chipset errata, on the 965GM, MSI interrupts may
2057          * be lost or delayed, but we use them anyways to avoid
2058          * stuck interrupts on some machines.
2059          */
2060         if (!IS_I945G(dev) && !IS_I945GM(dev))
2061                 pci_enable_msi(dev->pdev);
2062
2063         spin_lock_init(&dev_priv->user_irq_lock);
2064         spin_lock_init(&dev_priv->error_lock);
2065         dev_priv->trace_irq_seqno = 0;
2066
2067         ret = drm_vblank_init(dev, I915_NUM_PIPE);
2068
2069         if (ret) {
2070                 (void) i915_driver_unload(dev);
2071                 return ret;
2072         }
2073
2074         /* Start out suspended */
2075         dev_priv->mm.suspended = 1;
2076
2077         intel_detect_pch(dev);
2078
2079         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2080                 ret = i915_load_modeset_init(dev, prealloc_size, agp_size);
2081                 if (ret < 0) {
2082                         DRM_ERROR("failed to init modeset\n");
2083                         goto out_workqueue_free;
2084                 }
2085         }
2086
2087         /* Must be done after probing outputs */
2088         intel_opregion_init(dev);
2089         acpi_video_register();
2090
2091         setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
2092                     (unsigned long) dev);
2093
2094         spin_lock(&mchdev_lock);
2095         i915_mch_dev = dev_priv;
2096         dev_priv->mchdev_lock = &mchdev_lock;
2097         spin_unlock(&mchdev_lock);
2098
2099         ips_ping_for_i915_load();
2100
2101         return 0;
2102
2103 out_workqueue_free:
2104         destroy_workqueue(dev_priv->wq);
2105 out_iomapfree:
2106         io_mapping_free(dev_priv->mm.gtt_mapping);
2107 out_rmmap:
2108         iounmap(dev_priv->regs);
2109 put_bridge:
2110         pci_dev_put(dev_priv->bridge_dev);
2111 free_priv:
2112         kfree(dev_priv);
2113         return ret;
2114 }
2115
2116 int i915_driver_unload(struct drm_device *dev)
2117 {
2118         struct drm_i915_private *dev_priv = dev->dev_private;
2119         int ret;
2120
2121         spin_lock(&mchdev_lock);
2122         i915_mch_dev = NULL;
2123         spin_unlock(&mchdev_lock);
2124
2125         mutex_lock(&dev->struct_mutex);
2126         ret = i915_gpu_idle(dev);
2127         if (ret)
2128                 DRM_ERROR("failed to idle hardware: %d\n", ret);
2129         mutex_unlock(&dev->struct_mutex);
2130
2131         /* Cancel the retire work handler, which should be idle now. */
2132         cancel_delayed_work_sync(&dev_priv->mm.retire_work);
2133
2134         io_mapping_free(dev_priv->mm.gtt_mapping);
2135         if (dev_priv->mm.gtt_mtrr >= 0) {
2136                 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2137                          dev->agp->agp_info.aper_size * 1024 * 1024);
2138                 dev_priv->mm.gtt_mtrr = -1;
2139         }
2140
2141         acpi_video_unregister();
2142
2143         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2144                 intel_fbdev_fini(dev);
2145                 intel_modeset_cleanup(dev);
2146
2147                 /*
2148                  * free the memory space allocated for the child device
2149                  * config parsed from VBT
2150                  */
2151                 if (dev_priv->child_dev && dev_priv->child_dev_num) {
2152                         kfree(dev_priv->child_dev);
2153                         dev_priv->child_dev = NULL;
2154                         dev_priv->child_dev_num = 0;
2155                 }
2156
2157                 vga_switcheroo_unregister_client(dev->pdev);
2158                 vga_client_register(dev->pdev, NULL, NULL, NULL);
2159         }
2160
2161         /* Free error state after interrupts are fully disabled. */
2162         del_timer_sync(&dev_priv->hangcheck_timer);
2163         cancel_work_sync(&dev_priv->error_work);
2164         i915_destroy_error_state(dev);
2165
2166         if (dev->pdev->msi_enabled)
2167                 pci_disable_msi(dev->pdev);
2168
2169         intel_opregion_fini(dev);
2170
2171         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2172                 /* Flush any outstanding unpin_work. */
2173                 flush_workqueue(dev_priv->wq);
2174
2175                 i915_gem_free_all_phys_object(dev);
2176
2177                 mutex_lock(&dev->struct_mutex);
2178                 i915_gem_cleanup_ringbuffer(dev);
2179                 mutex_unlock(&dev->struct_mutex);
2180                 if (I915_HAS_FBC(dev) && i915_powersave)
2181                         i915_cleanup_compression(dev);
2182                 drm_mm_takedown(&dev_priv->mm.vram);
2183
2184                 intel_cleanup_overlay(dev);
2185
2186                 if (!I915_NEED_GFX_HWS(dev))
2187                         i915_free_hws(dev);
2188         }
2189
2190         if (dev_priv->regs != NULL)
2191                 iounmap(dev_priv->regs);
2192
2193         intel_teardown_gmbus(dev);
2194         intel_teardown_mchbar(dev);
2195
2196         destroy_workqueue(dev_priv->wq);
2197
2198         pci_dev_put(dev_priv->bridge_dev);
2199         kfree(dev->dev_private);
2200
2201         return 0;
2202 }
2203
2204 int i915_driver_open(struct drm_device *dev, struct drm_file *file)
2205 {
2206         struct drm_i915_file_private *file_priv;
2207
2208         DRM_DEBUG_DRIVER("\n");
2209         file_priv = kmalloc(sizeof(*file_priv), GFP_KERNEL);
2210         if (!file_priv)
2211                 return -ENOMEM;
2212
2213         file->driver_priv = file_priv;
2214
2215         spin_lock_init(&file_priv->mm.lock);
2216         INIT_LIST_HEAD(&file_priv->mm.request_list);
2217
2218         return 0;
2219 }
2220
2221 /**
2222  * i915_driver_lastclose - clean up after all DRM clients have exited
2223  * @dev: DRM device
2224  *
2225  * Take care of cleaning up after all DRM clients have exited.  In the
2226  * mode setting case, we want to restore the kernel's initial mode (just
2227  * in case the last client left us in a bad state).
2228  *
2229  * Additionally, in the non-mode setting case, we'll tear down the AGP
2230  * and DMA structures, since the kernel won't be using them, and clea
2231  * up any GEM state.
2232  */
2233 void i915_driver_lastclose(struct drm_device * dev)
2234 {
2235         drm_i915_private_t *dev_priv = dev->dev_private;
2236
2237         if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
2238                 drm_fb_helper_restore();
2239                 vga_switcheroo_process_delayed_switch();
2240                 return;
2241         }
2242
2243         i915_gem_lastclose(dev);
2244
2245         if (dev_priv->agp_heap)
2246                 i915_mem_takedown(&(dev_priv->agp_heap));
2247
2248         i915_dma_cleanup(dev);
2249 }
2250
2251 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
2252 {
2253         drm_i915_private_t *dev_priv = dev->dev_private;
2254         i915_gem_release(dev, file_priv);
2255         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2256                 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
2257 }
2258
2259 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
2260 {
2261         struct drm_i915_file_private *file_priv = file->driver_priv;
2262
2263         kfree(file_priv);
2264 }
2265
2266 struct drm_ioctl_desc i915_ioctls[] = {
2267         DRM_IOCTL_DEF_DRV(I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2268         DRM_IOCTL_DEF_DRV(I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
2269         DRM_IOCTL_DEF_DRV(I915_FLIP, i915_flip_bufs, DRM_AUTH),
2270         DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
2271         DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
2272         DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
2273         DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH),
2274         DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2275         DRM_IOCTL_DEF_DRV(I915_ALLOC, i915_mem_alloc, DRM_AUTH),
2276         DRM_IOCTL_DEF_DRV(I915_FREE, i915_mem_free, DRM_AUTH),
2277         DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2278         DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
2279         DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2280         DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2281         DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH),
2282         DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
2283         DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2284         DRM_IOCTL_DEF_DRV(I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2285         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
2286         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED),
2287         DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2288         DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2289         DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
2290         DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED),
2291         DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2292         DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2293         DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED),
2294         DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED),
2295         DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED),
2296         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED),
2297         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED),
2298         DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED),
2299         DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED),
2300         DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED),
2301         DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED),
2302         DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED),
2303         DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
2304         DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED),
2305         DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2306         DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2307 };
2308
2309 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
2310
2311 /**
2312  * Determine if the device really is AGP or not.
2313  *
2314  * All Intel graphics chipsets are treated as AGP, even if they are really
2315  * PCI-e.
2316  *
2317  * \param dev   The device to be tested.
2318  *
2319  * \returns
2320  * A value of 1 is always retured to indictate every i9x5 is AGP.
2321  */
2322 int i915_driver_device_is_agp(struct drm_device * dev)
2323 {
2324         return 1;
2325 }