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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/async.h>
  32 #include <drm/drmP.h>
  33 #include <drm/drm_crtc_helper.h>
  34 #include <drm/drm_fb_helper.h>
  35 #include <drm/drm_legacy.h>
  36 #include "intel_drv.h"
  37 #include <drm/i915_drm.h>
  38 #include "i915_drv.h"
  39 #include "i915_vgpu.h"
  40 #include "i915_trace.h"
  41 #include <linux/pci.h>
  42 #include <linux/console.h>
  43 #include <linux/vt.h>
  44 #include <linux/vgaarb.h>
  45 #include <linux/acpi.h>
  46 #include <linux/pnp.h>
  47 #include <linux/vga_switcheroo.h>
  48 #include <linux/slab.h>
  49 #include <acpi/video.h>
  50 #include <linux/pm.h>
  51 #include <linux/pm_runtime.h>
  52 #include <linux/oom.h>
  53
  54
  55 static int i915_getparam(struct drm_device *dev, void *data,
  56                          struct drm_file *file_priv)
  57 {
  58         struct drm_i915_private *dev_priv = dev->dev_private;
  59         drm_i915_getparam_t *param = data;
  60         int value;
  61
  62         switch (param->param) {
  63         case I915_PARAM_IRQ_ACTIVE:
  64         case I915_PARAM_ALLOW_BATCHBUFFER:
  65         case I915_PARAM_LAST_DISPATCH:
  66                 /* Reject all old ums/dri params. */
  67                 return -ENODEV;
  68         case I915_PARAM_CHIPSET_ID:
  69                 value = dev->pdev->device;
  70                 break;
  71         case I915_PARAM_REVISION:
  72                 value = dev->pdev->revision;
  73                 break;
  74         case I915_PARAM_HAS_GEM:
  75                 value = 1;
  76                 break;
  77         case I915_PARAM_NUM_FENCES_AVAIL:
  78                 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
  79                 break;
  80         case I915_PARAM_HAS_OVERLAY:
  81                 value = dev_priv->overlay ? 1 : 0;
  82                 break;
  83         case I915_PARAM_HAS_PAGEFLIPPING:
  84                 value = 1;
  85                 break;
  86         case I915_PARAM_HAS_EXECBUF2:
  87                 /* depends on GEM */
  88                 value = 1;
  89                 break;
  90         case I915_PARAM_HAS_BSD:
  91                 value = intel_ring_initialized(&dev_priv->ring[VCS]);
  92                 break;
  93         case I915_PARAM_HAS_BLT:
  94                 value = intel_ring_initialized(&dev_priv->ring[BCS]);
  95                 break;
  96         case I915_PARAM_HAS_VEBOX:
  97                 value = intel_ring_initialized(&dev_priv->ring[VECS]);
  98                 break;
  99         case I915_PARAM_HAS_BSD2:
 100                 value = intel_ring_initialized(&dev_priv->ring[VCS2]);
 101                 break;
 102         case I915_PARAM_HAS_RELAXED_FENCING:
 103                 value = 1;
 104                 break;
 105         case I915_PARAM_HAS_COHERENT_RINGS:
 106                 value = 1;
 107                 break;
 108         case I915_PARAM_HAS_EXEC_CONSTANTS:
 109                 value = INTEL_INFO(dev)->gen >= 4;
 110                 break;
 111         case I915_PARAM_HAS_RELAXED_DELTA:
 112                 value = 1;
 113                 break;
 114         case I915_PARAM_HAS_GEN7_SOL_RESET:
 115                 value = 1;
 116                 break;
 117         case I915_PARAM_HAS_LLC:
 118                 value = HAS_LLC(dev);
 119                 break;
 120         case I915_PARAM_HAS_WT:
 121                 value = HAS_WT(dev);
 122                 break;
 123         case I915_PARAM_HAS_ALIASING_PPGTT:
 124                 value = USES_PPGTT(dev);
 125                 break;
 126         case I915_PARAM_HAS_WAIT_TIMEOUT:
 127                 value = 1;
 128                 break;
 129         case I915_PARAM_HAS_SEMAPHORES:
 130                 value = i915_semaphore_is_enabled(dev);
 131                 break;
 132         case I915_PARAM_HAS_PRIME_VMAP_FLUSH:
 133                 value = 1;
 134                 break;
 135         case I915_PARAM_HAS_SECURE_BATCHES:
 136                 value = capable(CAP_SYS_ADMIN);
 137                 break;
 138         case I915_PARAM_HAS_PINNED_BATCHES:
 139                 value = 1;
 140                 break;
 141         case I915_PARAM_HAS_EXEC_NO_RELOC:
 142                 value = 1;
 143                 break;
 144         case I915_PARAM_HAS_EXEC_HANDLE_LUT:
 145                 value = 1;
 146                 break;
 147         case I915_PARAM_CMD_PARSER_VERSION:
 148                 value = i915_cmd_parser_get_version();
 149                 break;
 150         case I915_PARAM_HAS_COHERENT_PHYS_GTT:
 151                 value = 1;
 152                 break;
 153         case I915_PARAM_MMAP_VERSION:
 154                 value = 1;
 155                 break;
 156         case I915_PARAM_SUBSLICE_TOTAL:
 157                 value = INTEL_INFO(dev)->subslice_total;
 158                 if (!value)
 159                         return -ENODEV;
 160                 break;
 161         case I915_PARAM_EU_TOTAL:
 162                 value = INTEL_INFO(dev)->eu_total;
 163                 if (!value)
 164                         return -ENODEV;
 165                 break;
 166         case I915_PARAM_HAS_GPU_RESET:
 167                 value = i915.enable_hangcheck &&
 168                         intel_has_gpu_reset(dev);
 169                 break;
 170         case I915_PARAM_HAS_RESOURCE_STREAMER:
 171                 value = HAS_RESOURCE_STREAMER(dev);
 172                 break;
 173         default:
 174                 DRM_DEBUG("Unknown parameter %d\n", param->param);
 175                 return -EINVAL;
 176         }
 177
 178         if (copy_to_user(param->value, &value, sizeof(int))) {
 179                 DRM_ERROR("copy_to_user failed\n");
 180                 return -EFAULT;
 181         }
 182
 183         return 0;
 184 }
 185
 186 static int i915_setparam(struct drm_device *dev, void *data,
 187                          struct drm_file *file_priv)
 188 {
 189         struct drm_i915_private *dev_priv = dev->dev_private;
 190         drm_i915_setparam_t *param = data;
 191
 192         switch (param->param) {
 193         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 194         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 195         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 196                 /* Reject all old ums/dri params. */
 197                 return -ENODEV;
 198
 199         case I915_SETPARAM_NUM_USED_FENCES:
 200                 if (param->value > dev_priv->num_fence_regs ||
 201                     param->value < 0)
 202                         return -EINVAL;
 203                 /* Userspace can use first N regs */
 204                 dev_priv->fence_reg_start = param->value;
 205                 break;
 206         default:
 207                 DRM_DEBUG_DRIVER("unknown parameter %d\n",
 208                                         param->param);
 209                 return -EINVAL;
 210         }
 211
 212         return 0;
 213 }
 214
 215 static int i915_get_bridge_dev(struct drm_device *dev)
 216 {
 217         struct drm_i915_private *dev_priv = dev->dev_private;
 218
 219         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
 220         if (!dev_priv->bridge_dev) {
 221                 DRM_ERROR("bridge device not found\n");
 222                 return -1;
 223         }
 224         return 0;
 225 }
 226
 227 #define MCHBAR_I915 0x44
 228 #define MCHBAR_I965 0x48
 229 #define MCHBAR_SIZE (4*4096)
 230
 231 #define DEVEN_REG 0x54
 232 #define   DEVEN_MCHBAR_EN (1 << 28)
 233
 234 /* Allocate space for the MCH regs if needed, return nonzero on error */
 235 static int
 236 intel_alloc_mchbar_resource(struct drm_device *dev)
 237 {
 238         struct drm_i915_private *dev_priv = dev->dev_private;
 239         int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 240         u32 temp_lo, temp_hi = 0;
 241         u64 mchbar_addr;
 242         int ret;
 243
 244         if (INTEL_INFO(dev)->gen >= 4)
 245                 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
 246         pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
 247         mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
 248
 249         /* If ACPI doesn't have it, assume we need to allocate it ourselves */
 250 #ifdef CONFIG_PNP
 251         if (mchbar_addr &&
 252             pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
 253                 return 0;
 254 #endif
 255
 256         /* Get some space for it */
 257         dev_priv->mch_res.name = "i915 MCHBAR";
 258         dev_priv->mch_res.flags = IORESOURCE_MEM;
 259         ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
 260                                      &dev_priv->mch_res,
 261                                      MCHBAR_SIZE, MCHBAR_SIZE,
 262                                      PCIBIOS_MIN_MEM,
 263                                      0, pcibios_align_resource,
 264                                      dev_priv->bridge_dev);
 265         if (ret) {
 266                 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
 267                 dev_priv->mch_res.start = 0;
 268                 return ret;
 269         }
 270
 271         if (INTEL_INFO(dev)->gen >= 4)
 272                 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
 273                                        upper_32_bits(dev_priv->mch_res.start));
 274
 275         pci_write_config_dword(dev_priv->bridge_dev, reg,
 276                                lower_32_bits(dev_priv->mch_res.start));
 277         return 0;
 278 }
 279
 280 /* Setup MCHBAR if possible, return true if we should disable it again */
 281 static void
 282 intel_setup_mchbar(struct drm_device *dev)
 283 {
 284         struct drm_i915_private *dev_priv = dev->dev_private;
 285         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 286         u32 temp;
 287         bool enabled;
 288
 289         if (IS_VALLEYVIEW(dev))
 290                 return;
 291
 292         dev_priv->mchbar_need_disable = false;
 293
 294         if (IS_I915G(dev) || IS_I915GM(dev)) {
 295                 pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
 296                 enabled = !!(temp & DEVEN_MCHBAR_EN);
 297         } else {
 298                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 299                 enabled = temp & 1;
 300         }
 301
 302         /* If it's already enabled, don't have to do anything */
 303         if (enabled)
 304                 return;
 305
 306         if (intel_alloc_mchbar_resource(dev))
 307                 return;
 308
 309         dev_priv->mchbar_need_disable = true;
 310
 311         /* Space is allocated or reserved, so enable it. */
 312         if (IS_I915G(dev) || IS_I915GM(dev)) {
 313                 pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
 314                                        temp | DEVEN_MCHBAR_EN);
 315         } else {
 316                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 317                 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
 318         }
 319 }
 320
 321 static void
 322 intel_teardown_mchbar(struct drm_device *dev)
 323 {
 324         struct drm_i915_private *dev_priv = dev->dev_private;
 325         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 326         u32 temp;
 327
 328         if (dev_priv->mchbar_need_disable) {
 329                 if (IS_I915G(dev) || IS_I915GM(dev)) {
 330                         pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
 331                         temp &= ~DEVEN_MCHBAR_EN;
 332                         pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
 333                 } else {
 334                         pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 335                         temp &= ~1;
 336                         pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
 337                 }
 338         }
 339
 340         if (dev_priv->mch_res.start)
 341                 release_resource(&dev_priv->mch_res);
 342 }
 343
 344 /* true = enable decode, false = disable decoder */
 345 static unsigned int i915_vga_set_decode(void *cookie, bool state)
 346 {
 347         struct drm_device *dev = cookie;
 348
 349         intel_modeset_vga_set_state(dev, state);
 350         if (state)
 351                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
 352                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
 353         else
 354                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
 355 }
 356
 357 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
 358 {
 359         struct drm_device *dev = pci_get_drvdata(pdev);
 360         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
 361
 362         if (state == VGA_SWITCHEROO_ON) {
 363                 pr_info("switched on\n");
 364                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 365                 /* i915 resume handler doesn't set to D0 */
 366                 pci_set_power_state(dev->pdev, PCI_D0);
 367                 i915_resume_legacy(dev);
 368                 dev->switch_power_state = DRM_SWITCH_POWER_ON;
 369         } else {
 370                 pr_err("switched off\n");
 371                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 372                 i915_suspend_legacy(dev, pmm);
 373                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
 374         }
 375 }
 376
 377 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
 378 {
 379         struct drm_device *dev = pci_get_drvdata(pdev);
 380
 381         /*
 382          * FIXME: open_count is protected by drm_global_mutex but that would lead to
 383          * locking inversion with the driver load path. And the access here is
 384          * completely racy anyway. So don't bother with locking for now.
 385          */
 386         return dev->open_count == 0;
 387 }
 388
 389 static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
 390         .set_gpu_state = i915_switcheroo_set_state,
 391         .reprobe = NULL,
 392         .can_switch = i915_switcheroo_can_switch,
 393 };
 394
 395 static int i915_load_modeset_init(struct drm_device *dev)
 396 {
 397         struct drm_i915_private *dev_priv = dev->dev_private;
 398         int ret;
 399
 400         ret = intel_parse_bios(dev);
 401         if (ret)
 402                 DRM_INFO("failed to find VBIOS tables\n");
 403
 404         /* If we have > 1 VGA cards, then we need to arbitrate access
 405          * to the common VGA resources.
 406          *
 407          * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
 408          * then we do not take part in VGA arbitration and the
 409          * vga_client_register() fails with -ENODEV.
 410          */
 411         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
 412         if (ret && ret != -ENODEV)
 413                 goto out;
 414
 415         intel_register_dsm_handler();
 416
 417         ret = vga_switcheroo_register_client(dev->pdev, &i915_switcheroo_ops, false);
 418         if (ret)
 419                 goto cleanup_vga_client;
 420
 421         /* Initialise stolen first so that we may reserve preallocated
 422          * objects for the BIOS to KMS transition.
 423          */
 424         ret = i915_gem_init_stolen(dev);
 425         if (ret)
 426                 goto cleanup_vga_switcheroo;
 427
 428         intel_power_domains_init_hw(dev_priv);
 429
 430         ret = intel_irq_install(dev_priv);
 431         if (ret)
 432                 goto cleanup_gem_stolen;
 433
 434         /* Important: The output setup functions called by modeset_init need
 435          * working irqs for e.g. gmbus and dp aux transfers. */
 436         intel_modeset_init(dev);
 437
 438         /* intel_guc_ucode_init() needs the mutex to allocate GEM objects */
 439         mutex_lock(&dev->struct_mutex);
 440         intel_guc_ucode_init(dev);
 441         mutex_unlock(&dev->struct_mutex);
 442
 443         ret = i915_gem_init(dev);
 444         if (ret)
 445                 goto cleanup_irq;
 446
 447         intel_modeset_gem_init(dev);
 448
 449         /* Always safe in the mode setting case. */
 450         /* FIXME: do pre/post-mode set stuff in core KMS code */
 451         dev->vblank_disable_allowed = true;
 452         if (INTEL_INFO(dev)->num_pipes == 0)
 453                 return 0;
 454
 455         ret = intel_fbdev_init(dev);
 456         if (ret)
 457                 goto cleanup_gem;
 458
 459         /* Only enable hotplug handling once the fbdev is fully set up. */
 460         intel_hpd_init(dev_priv);
 461
 462         /*
 463          * Some ports require correctly set-up hpd registers for detection to
 464          * work properly (leading to ghost connected connector status), e.g. VGA
 465          * on gm45.  Hence we can only set up the initial fbdev config after hpd
 466          * irqs are fully enabled. Now we should scan for the initial config
 467          * only once hotplug handling is enabled, but due to screwed-up locking
 468          * around kms/fbdev init we can't protect the fdbev initial config
 469          * scanning against hotplug events. Hence do this first and ignore the
 470          * tiny window where we will loose hotplug notifactions.
 471          */
 472         async_schedule(intel_fbdev_initial_config, dev_priv);
 473
 474         drm_kms_helper_poll_init(dev);
 475
 476         return 0;
 477
 478 cleanup_gem:
 479         mutex_lock(&dev->struct_mutex);
 480         i915_gem_cleanup_ringbuffer(dev);
 481         i915_gem_context_fini(dev);
 482         mutex_unlock(&dev->struct_mutex);
 483 cleanup_irq:
 484         mutex_lock(&dev->struct_mutex);
 485         intel_guc_ucode_fini(dev);
 486         mutex_unlock(&dev->struct_mutex);
 487         drm_irq_uninstall(dev);
 488 cleanup_gem_stolen:
 489         i915_gem_cleanup_stolen(dev);
 490 cleanup_vga_switcheroo:
 491         vga_switcheroo_unregister_client(dev->pdev);
 492 cleanup_vga_client:
 493         vga_client_register(dev->pdev, NULL, NULL, NULL);
 494 out:
 495         return ret;
 496 }
 497
 498 #if IS_ENABLED(CONFIG_FB)
 499 static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
 500 {
 501         struct apertures_struct *ap;
 502         struct pci_dev *pdev = dev_priv->dev->pdev;
 503         bool primary;
 504         int ret;
 505
 506         ap = alloc_apertures(1);
 507         if (!ap)
 508                 return -ENOMEM;
 509
 510         ap->ranges[0].base = dev_priv->gtt.mappable_base;
 511         ap->ranges[0].size = dev_priv->gtt.mappable_end;
 512
 513         primary =
 514                 pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
 515
 516         ret = remove_conflicting_framebuffers(ap, "inteldrmfb", primary);
 517
 518         kfree(ap);
 519
 520         return ret;
 521 }
 522 #else
 523 static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
 524 {
 525         return 0;
 526 }
 527 #endif
 528
 529 #if !defined(CONFIG_VGA_CONSOLE)
 530 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
 531 {
 532         return 0;
 533 }
 534 #elif !defined(CONFIG_DUMMY_CONSOLE)
 535 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
 536 {
 537         return -ENODEV;
 538 }
 539 #else
 540 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
 541 {
 542         int ret = 0;
 543
 544         DRM_INFO("Replacing VGA console driver\n");
 545
 546         console_lock();
 547         if (con_is_bound(&vga_con))
 548                 ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
 549         if (ret == 0) {
 550                 ret = do_unregister_con_driver(&vga_con);
 551
 552                 /* Ignore "already unregistered". */
 553                 if (ret == -ENODEV)
 554                         ret = 0;
 555         }
 556         console_unlock();
 557
 558         return ret;
 559 }
 560 #endif
 561
 562 static void i915_dump_device_info(struct drm_i915_private *dev_priv)
 563 {
 564         const struct intel_device_info *info = &dev_priv->info;
 565
 566 #define PRINT_S(name) "%s"
 567 #define SEP_EMPTY
 568 #define PRINT_FLAG(name) info->name ? #name "," : ""
 569 #define SEP_COMMA ,
 570         DRM_DEBUG_DRIVER("i915 device info: gen=%i, pciid=0x%04x rev=0x%02x flags="
 571                          DEV_INFO_FOR_EACH_FLAG(PRINT_S, SEP_EMPTY),
 572                          info->gen,
 573                          dev_priv->dev->pdev->device,
 574                          dev_priv->dev->pdev->revision,
 575                          DEV_INFO_FOR_EACH_FLAG(PRINT_FLAG, SEP_COMMA));
 576 #undef PRINT_S
 577 #undef SEP_EMPTY
 578 #undef PRINT_FLAG
 579 #undef SEP_COMMA
 580 }
 581
 582 static void cherryview_sseu_info_init(struct drm_device *dev)
 583 {
 584         struct drm_i915_private *dev_priv = dev->dev_private;
 585         struct intel_device_info *info;
 586         u32 fuse, eu_dis;
 587
 588         info = (struct intel_device_info *)&dev_priv->info;
 589         fuse = I915_READ(CHV_FUSE_GT);
 590
 591         info->slice_total = 1;
 592
 593         if (!(fuse & CHV_FGT_DISABLE_SS0)) {
 594                 info->subslice_per_slice++;
 595                 eu_dis = fuse & (CHV_FGT_EU_DIS_SS0_R0_MASK |
 596                                  CHV_FGT_EU_DIS_SS0_R1_MASK);
 597                 info->eu_total += 8 - hweight32(eu_dis);
 598         }
 599
 600         if (!(fuse & CHV_FGT_DISABLE_SS1)) {
 601                 info->subslice_per_slice++;
 602                 eu_dis = fuse & (CHV_FGT_EU_DIS_SS1_R0_MASK |
 603                                  CHV_FGT_EU_DIS_SS1_R1_MASK);
 604                 info->eu_total += 8 - hweight32(eu_dis);
 605         }
 606
 607         info->subslice_total = info->subslice_per_slice;
 608         /*
 609          * CHV expected to always have a uniform distribution of EU
 610          * across subslices.
 611         */
 612         info->eu_per_subslice = info->subslice_total ?
 613                                 info->eu_total / info->subslice_total :
 614                                 0;
 615         /*
 616          * CHV supports subslice power gating on devices with more than
 617          * one subslice, and supports EU power gating on devices with
 618          * more than one EU pair per subslice.
 619         */
 620         info->has_slice_pg = 0;
 621         info->has_subslice_pg = (info->subslice_total > 1);
 622         info->has_eu_pg = (info->eu_per_subslice > 2);
 623 }
 624
 625 static void gen9_sseu_info_init(struct drm_device *dev)
 626 {
 627         struct drm_i915_private *dev_priv = dev->dev_private;
 628         struct intel_device_info *info;
 629         int s_max = 3, ss_max = 4, eu_max = 8;
 630         int s, ss;
 631         u32 fuse2, s_enable, ss_disable, eu_disable;
 632         u8 eu_mask = 0xff;
 633
 634         /*
 635          * BXT has a single slice. BXT also has at most 6 EU per subslice,
 636          * and therefore only the lowest 6 bits of the 8-bit EU disable
 637          * fields are valid.
 638         */
 639         if (IS_BROXTON(dev)) {
 640                 s_max = 1;
 641                 eu_max = 6;
 642                 eu_mask = 0x3f;
 643         }
 644
 645         info = (struct intel_device_info *)&dev_priv->info;
 646         fuse2 = I915_READ(GEN8_FUSE2);
 647         s_enable = (fuse2 & GEN8_F2_S_ENA_MASK) >>
 648                    GEN8_F2_S_ENA_SHIFT;
 649         ss_disable = (fuse2 & GEN9_F2_SS_DIS_MASK) >>
 650                      GEN9_F2_SS_DIS_SHIFT;
 651
 652         info->slice_total = hweight32(s_enable);
 653         /*
 654          * The subslice disable field is global, i.e. it applies
 655          * to each of the enabled slices.
 656         */
 657         info->subslice_per_slice = ss_max - hweight32(ss_disable);
 658         info->subslice_total = info->slice_total *
 659                                info->subslice_per_slice;
 660
 661         /*
 662          * Iterate through enabled slices and subslices to
 663          * count the total enabled EU.
 664         */
 665         for (s = 0; s < s_max; s++) {
 666                 if (!(s_enable & (0x1 << s)))
 667                         /* skip disabled slice */
 668                         continue;
 669
 670                 eu_disable = I915_READ(GEN9_EU_DISABLE(s));
 671                 for (ss = 0; ss < ss_max; ss++) {
 672                         int eu_per_ss;
 673
 674                         if (ss_disable & (0x1 << ss))
 675                                 /* skip disabled subslice */
 676                                 continue;
 677
 678                         eu_per_ss = eu_max - hweight8((eu_disable >> (ss*8)) &
 679                                                       eu_mask);
 680
 681                         /*
 682                          * Record which subslice(s) has(have) 7 EUs. we
 683                          * can tune the hash used to spread work among
 684                          * subslices if they are unbalanced.
 685                          */
 686                         if (eu_per_ss == 7)
 687                                 info->subslice_7eu[s] |= 1 << ss;
 688
 689                         info->eu_total += eu_per_ss;
 690                 }
 691         }
 692
 693         /*
 694          * SKL is expected to always have a uniform distribution
 695          * of EU across subslices with the exception that any one
 696          * EU in any one subslice may be fused off for die
 697          * recovery. BXT is expected to be perfectly uniform in EU
 698          * distribution.
 699         */
 700         info->eu_per_subslice = info->subslice_total ?
 701                                 DIV_ROUND_UP(info->eu_total,
 702                                              info->subslice_total) : 0;
 703         /*
 704          * SKL supports slice power gating on devices with more than
 705          * one slice, and supports EU power gating on devices with
 706          * more than one EU pair per subslice. BXT supports subslice
 707          * power gating on devices with more than one subslice, and
 708          * supports EU power gating on devices with more than one EU
 709          * pair per subslice.
 710         */
 711         info->has_slice_pg = (IS_SKYLAKE(dev) && (info->slice_total > 1));
 712         info->has_subslice_pg = (IS_BROXTON(dev) && (info->subslice_total > 1));
 713         info->has_eu_pg = (info->eu_per_subslice > 2);
 714 }
 715
 716 /*
 717  * Determine various intel_device_info fields at runtime.
 718  *
 719  * Use it when either:
 720  *   - it's judged too laborious to fill n static structures with the limit
 721  *     when a simple if statement does the job,
 722  *   - run-time checks (eg read fuse/strap registers) are needed.
 723  *
 724  * This function needs to be called:
 725  *   - after the MMIO has been setup as we are reading registers,
 726  *   - after the PCH has been detected,
 727  *   - before the first usage of the fields it can tweak.
 728  */
 729 static void intel_device_info_runtime_init(struct drm_device *dev)
 730 {
 731         struct drm_i915_private *dev_priv = dev->dev_private;
 732         struct intel_device_info *info;
 733         enum pipe pipe;
 734
 735         info = (struct intel_device_info *)&dev_priv->info;
 736
 737         /*
 738          * Skylake and Broxton currently don't expose the topmost plane as its
 739          * use is exclusive with the legacy cursor and we only want to expose
 740          * one of those, not both. Until we can safely expose the topmost plane
 741          * as a DRM_PLANE_TYPE_CURSOR with all the features exposed/supported,
 742          * we don't expose the topmost plane at all to prevent ABI breakage
 743          * down the line.
 744          */
 745         if (IS_BROXTON(dev)) {
 746                 info->num_sprites[PIPE_A] = 2;
 747                 info->num_sprites[PIPE_B] = 2;
 748                 info->num_sprites[PIPE_C] = 1;
 749         } else if (IS_VALLEYVIEW(dev))
 750                 for_each_pipe(dev_priv, pipe)
 751                         info->num_sprites[pipe] = 2;
 752         else
 753                 for_each_pipe(dev_priv, pipe)
 754                         info->num_sprites[pipe] = 1;
 755
 756         if (i915.disable_display) {
 757                 DRM_INFO("Display disabled (module parameter)\n");
 758                 info->num_pipes = 0;
 759         } else if (info->num_pipes > 0 &&
 760                    (INTEL_INFO(dev)->gen == 7 || INTEL_INFO(dev)->gen == 8) &&
 761                    !IS_VALLEYVIEW(dev)) {
 762                 u32 fuse_strap = I915_READ(FUSE_STRAP);
 763                 u32 sfuse_strap = I915_READ(SFUSE_STRAP);
 764
 765                 /*
 766                  * SFUSE_STRAP is supposed to have a bit signalling the display
 767                  * is fused off. Unfortunately it seems that, at least in
 768                  * certain cases, fused off display means that PCH display
 769                  * reads don't land anywhere. In that case, we read 0s.
 770                  *
 771                  * On CPT/PPT, we can detect this case as SFUSE_STRAP_FUSE_LOCK
 772                  * should be set when taking over after the firmware.
 773                  */
 774                 if (fuse_strap & ILK_INTERNAL_DISPLAY_DISABLE ||
 775                     sfuse_strap & SFUSE_STRAP_DISPLAY_DISABLED ||
 776                     (dev_priv->pch_type == PCH_CPT &&
 777                      !(sfuse_strap & SFUSE_STRAP_FUSE_LOCK))) {
 778                         DRM_INFO("Display fused off, disabling\n");
 779                         info->num_pipes = 0;
 780                 }
 781         }
 782
 783         /* Initialize slice/subslice/EU info */
 784         if (IS_CHERRYVIEW(dev))
 785                 cherryview_sseu_info_init(dev);
 786         else if (INTEL_INFO(dev)->gen >= 9)
 787                 gen9_sseu_info_init(dev);
 788
 789         DRM_DEBUG_DRIVER("slice total: %u\n", info->slice_total);
 790         DRM_DEBUG_DRIVER("subslice total: %u\n", info->subslice_total);
 791         DRM_DEBUG_DRIVER("subslice per slice: %u\n", info->subslice_per_slice);
 792         DRM_DEBUG_DRIVER("EU total: %u\n", info->eu_total);
 793         DRM_DEBUG_DRIVER("EU per subslice: %u\n", info->eu_per_subslice);
 794         DRM_DEBUG_DRIVER("has slice power gating: %s\n",
 795                          info->has_slice_pg ? "y" : "n");
 796         DRM_DEBUG_DRIVER("has subslice power gating: %s\n",
 797                          info->has_subslice_pg ? "y" : "n");
 798         DRM_DEBUG_DRIVER("has EU power gating: %s\n",
 799                          info->has_eu_pg ? "y" : "n");
 800 }
 801
 802 /**
 803  * i915_driver_load - setup chip and create an initial config
 804  * @dev: DRM device
 805  * @flags: startup flags
 806  *
 807  * The driver load routine has to do several things:
 808  *   - drive output discovery via intel_modeset_init()
 809  *   - initialize the memory manager
 810  *   - allocate initial config memory
 811  *   - setup the DRM framebuffer with the allocated memory
 812  */
 813 int i915_driver_load(struct drm_device *dev, unsigned long flags)
 814 {
 815         struct drm_i915_private *dev_priv;
 816         struct intel_device_info *info, *device_info;
 817         int ret = 0, mmio_bar, mmio_size;
 818         uint32_t aperture_size;
 819
 820         info = (struct intel_device_info *) flags;
 821
 822         dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL);
 823         if (dev_priv == NULL)
 824                 return -ENOMEM;
 825
 826         dev->dev_private = dev_priv;
 827         dev_priv->dev = dev;
 828
 829         /* Setup the write-once "constant" device info */
 830         device_info = (struct intel_device_info *)&dev_priv->info;
 831         memcpy(device_info, info, sizeof(dev_priv->info));
 832         device_info->device_id = dev->pdev->device;
 833
 834         spin_lock_init(&dev_priv->irq_lock);
 835         spin_lock_init(&dev_priv->gpu_error.lock);
 836         mutex_init(&dev_priv->backlight_lock);
 837         spin_lock_init(&dev_priv->uncore.lock);
 838         spin_lock_init(&dev_priv->mm.object_stat_lock);
 839         spin_lock_init(&dev_priv->mmio_flip_lock);
 840         mutex_init(&dev_priv->sb_lock);
 841         mutex_init(&dev_priv->modeset_restore_lock);
 842         mutex_init(&dev_priv->csr_lock);
 843
 844         intel_pm_setup(dev);
 845
 846         intel_display_crc_init(dev);
 847
 848         i915_dump_device_info(dev_priv);
 849
 850         /* Not all pre-production machines fall into this category, only the
 851          * very first ones. Almost everything should work, except for maybe
 852          * suspend/resume. And we don't implement workarounds that affect only
 853          * pre-production machines. */
 854         if (IS_HSW_EARLY_SDV(dev))
 855                 DRM_INFO("This is an early pre-production Haswell machine. "
 856                          "It may not be fully functional.\n");
 857
 858         if (i915_get_bridge_dev(dev)) {
 859                 ret = -EIO;
 860                 goto free_priv;
 861         }
 862
 863         mmio_bar = IS_GEN2(dev) ? 1 : 0;
 864         /* Before gen4, the registers and the GTT are behind different BARs.
 865          * However, from gen4 onwards, the registers and the GTT are shared
 866          * in the same BAR, so we want to restrict this ioremap from
 867          * clobbering the GTT which we want ioremap_wc instead. Fortunately,
 868          * the register BAR remains the same size for all the earlier
 869          * generations up to Ironlake.
 870          */
 871         if (info->gen < 5)
 872                 mmio_size = 512*1024;
 873         else
 874                 mmio_size = 2*1024*1024;
 875
 876         dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, mmio_size);
 877         if (!dev_priv->regs) {
 878                 DRM_ERROR("failed to map registers\n");
 879                 ret = -EIO;
 880                 goto put_bridge;
 881         }
 882
 883         /* This must be called before any calls to HAS_PCH_* */
 884         intel_detect_pch(dev);
 885
 886         intel_uncore_init(dev);
 887
 888         /* Load CSR Firmware for SKL */
 889         intel_csr_ucode_init(dev);
 890
 891         ret = i915_gem_gtt_init(dev);
 892         if (ret)
 893                 goto out_freecsr;
 894
 895         /* WARNING: Apparently we must kick fbdev drivers before vgacon,
 896          * otherwise the vga fbdev driver falls over. */
 897         ret = i915_kick_out_firmware_fb(dev_priv);
 898         if (ret) {
 899                 DRM_ERROR("failed to remove conflicting framebuffer drivers\n");
 900                 goto out_gtt;
 901         }
 902
 903         ret = i915_kick_out_vgacon(dev_priv);
 904         if (ret) {
 905                 DRM_ERROR("failed to remove conflicting VGA console\n");
 906                 goto out_gtt;
 907         }
 908
 909         pci_set_master(dev->pdev);
 910
 911         /* overlay on gen2 is broken and can't address above 1G */
 912         if (IS_GEN2(dev))
 913                 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
 914
 915         /* 965GM sometimes incorrectly writes to hardware status page (HWS)
 916          * using 32bit addressing, overwriting memory if HWS is located
 917          * above 4GB.
 918          *
 919          * The documentation also mentions an issue with undefined
 920          * behaviour if any general state is accessed within a page above 4GB,
 921          * which also needs to be handled carefully.
 922          */
 923         if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
 924                 dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32));
 925
 926         aperture_size = dev_priv->gtt.mappable_end;
 927
 928         dev_priv->gtt.mappable =
 929                 io_mapping_create_wc(dev_priv->gtt.mappable_base,
 930                                      aperture_size);
 931         if (dev_priv->gtt.mappable == NULL) {
 932                 ret = -EIO;
 933                 goto out_gtt;
 934         }
 935
 936         dev_priv->gtt.mtrr = arch_phys_wc_add(dev_priv->gtt.mappable_base,
 937                                               aperture_size);
 938
 939         /* The i915 workqueue is primarily used for batched retirement of
 940          * requests (and thus managing bo) once the task has been completed
 941          * by the GPU. i915_gem_retire_requests() is called directly when we
 942          * need high-priority retirement, such as waiting for an explicit
 943          * bo.
 944          *
 945          * It is also used for periodic low-priority events, such as
 946          * idle-timers and recording error state.
 947          *
 948          * All tasks on the workqueue are expected to acquire the dev mutex
 949          * so there is no point in running more than one instance of the
 950          * workqueue at any time.  Use an ordered one.
 951          */
 952         dev_priv->wq = alloc_ordered_workqueue("i915", 0);
 953         if (dev_priv->wq == NULL) {
 954                 DRM_ERROR("Failed to create our workqueue.\n");
 955                 ret = -ENOMEM;
 956                 goto out_mtrrfree;
 957         }
 958
 959         dev_priv->hotplug.dp_wq = alloc_ordered_workqueue("i915-dp", 0);
 960         if (dev_priv->hotplug.dp_wq == NULL) {
 961                 DRM_ERROR("Failed to create our dp workqueue.\n");
 962                 ret = -ENOMEM;
 963                 goto out_freewq;
 964         }
 965
 966         dev_priv->gpu_error.hangcheck_wq =
 967                 alloc_ordered_workqueue("i915-hangcheck", 0);
 968         if (dev_priv->gpu_error.hangcheck_wq == NULL) {
 969                 DRM_ERROR("Failed to create our hangcheck workqueue.\n");
 970                 ret = -ENOMEM;
 971                 goto out_freedpwq;
 972         }
 973
 974         intel_irq_init(dev_priv);
 975         intel_uncore_sanitize(dev);
 976
 977         /* Try to make sure MCHBAR is enabled before poking at it */
 978         intel_setup_mchbar(dev);
 979         intel_setup_gmbus(dev);
 980         intel_opregion_setup(dev);
 981
 982         intel_setup_bios(dev);
 983
 984         i915_gem_load(dev);
 985
 986         /* On the 945G/GM, the chipset reports the MSI capability on the
 987          * integrated graphics even though the support isn't actually there
 988          * according to the published specs.  It doesn't appear to function
 989          * correctly in testing on 945G.
 990          * This may be a side effect of MSI having been made available for PEG
 991          * and the registers being closely associated.
 992          *
 993          * According to chipset errata, on the 965GM, MSI interrupts may
 994          * be lost or delayed, but we use them anyways to avoid
 995          * stuck interrupts on some machines.
 996          */
 997         if (!IS_I945G(dev) && !IS_I945GM(dev))
 998                 pci_enable_msi(dev->pdev);
 999
1000         intel_device_info_runtime_init(dev);
1001
1002         if (INTEL_INFO(dev)->num_pipes) {
1003                 ret = drm_vblank_init(dev, INTEL_INFO(dev)->num_pipes);
1004                 if (ret)
1005                         goto out_gem_unload;
1006         }
1007
1008         intel_power_domains_init(dev_priv);
1009
1010         ret = i915_load_modeset_init(dev);
1011         if (ret < 0) {
1012                 DRM_ERROR("failed to init modeset\n");
1013                 goto out_power_well;
1014         }
1015
1016         /*
1017          * Notify a valid surface after modesetting,
1018          * when running inside a VM.
1019          */
1020         if (intel_vgpu_active(dev))
1021                 I915_WRITE(vgtif_reg(display_ready), VGT_DRV_DISPLAY_READY);
1022
1023         i915_setup_sysfs(dev);
1024
1025         if (INTEL_INFO(dev)->num_pipes) {
1026                 /* Must be done after probing outputs */
1027                 intel_opregion_init(dev);
1028                 acpi_video_register();
1029         }
1030
1031         if (IS_GEN5(dev))
1032                 intel_gpu_ips_init(dev_priv);
1033
1034         intel_runtime_pm_enable(dev_priv);
1035
1036         i915_audio_component_init(dev_priv);
1037
1038         return 0;
1039
1040 out_power_well:
1041         intel_power_domains_fini(dev_priv);
1042         drm_vblank_cleanup(dev);
1043 out_gem_unload:
1044         WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier));
1045         unregister_shrinker(&dev_priv->mm.shrinker);
1046
1047         if (dev->pdev->msi_enabled)
1048                 pci_disable_msi(dev->pdev);
1049
1050         intel_teardown_gmbus(dev);
1051         intel_teardown_mchbar(dev);
1052         pm_qos_remove_request(&dev_priv->pm_qos);
1053         destroy_workqueue(dev_priv->gpu_error.hangcheck_wq);
1054 out_freedpwq:
1055         destroy_workqueue(dev_priv->hotplug.dp_wq);
1056 out_freewq:
1057         destroy_workqueue(dev_priv->wq);
1058 out_mtrrfree:
1059         arch_phys_wc_del(dev_priv->gtt.mtrr);
1060         io_mapping_free(dev_priv->gtt.mappable);
1061 out_gtt:
1062         i915_global_gtt_cleanup(dev);
1063 out_freecsr:
1064         intel_csr_ucode_fini(dev);
1065         intel_uncore_fini(dev);
1066         pci_iounmap(dev->pdev, dev_priv->regs);
1067 put_bridge:
1068         pci_dev_put(dev_priv->bridge_dev);
1069 free_priv:
1070         if (dev_priv->requests)
1071                 kmem_cache_destroy(dev_priv->requests);
1072         if (dev_priv->vmas)
1073                 kmem_cache_destroy(dev_priv->vmas);
1074         if (dev_priv->objects)
1075                 kmem_cache_destroy(dev_priv->objects);
1076         kfree(dev_priv);
1077         return ret;
1078 }
1079
1080 int i915_driver_unload(struct drm_device *dev)
1081 {
1082         struct drm_i915_private *dev_priv = dev->dev_private;
1083         int ret;
1084
1085         i915_audio_component_cleanup(dev_priv);
1086
1087         ret = i915_gem_suspend(dev);
1088         if (ret) {
1089                 DRM_ERROR("failed to idle hardware: %d\n", ret);
1090                 return ret;
1091         }
1092
1093         intel_power_domains_fini(dev_priv);
1094
1095         intel_gpu_ips_teardown();
1096
1097         i915_teardown_sysfs(dev);
1098
1099         WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier));
1100         unregister_shrinker(&dev_priv->mm.shrinker);
1101
1102         io_mapping_free(dev_priv->gtt.mappable);
1103         arch_phys_wc_del(dev_priv->gtt.mtrr);
1104
1105         acpi_video_unregister();
1106
1107         intel_fbdev_fini(dev);
1108
1109         drm_vblank_cleanup(dev);
1110
1111         intel_modeset_cleanup(dev);
1112
1113         /*
1114          * free the memory space allocated for the child device
1115          * config parsed from VBT
1116          */
1117         if (dev_priv->vbt.child_dev && dev_priv->vbt.child_dev_num) {
1118                 kfree(dev_priv->vbt.child_dev);
1119                 dev_priv->vbt.child_dev = NULL;
1120                 dev_priv->vbt.child_dev_num = 0;
1121         }
1122
1123         vga_switcheroo_unregister_client(dev->pdev);
1124         vga_client_register(dev->pdev, NULL, NULL, NULL);
1125
1126         /* Free error state after interrupts are fully disabled. */
1127         cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
1128         i915_destroy_error_state(dev);
1129
1130         if (dev->pdev->msi_enabled)
1131                 pci_disable_msi(dev->pdev);
1132
1133         intel_opregion_fini(dev);
1134
1135         /* Flush any outstanding unpin_work. */
1136         flush_workqueue(dev_priv->wq);
1137
1138         mutex_lock(&dev->struct_mutex);
1139         intel_guc_ucode_fini(dev);
1140         i915_gem_cleanup_ringbuffer(dev);
1141         i915_gem_context_fini(dev);
1142         mutex_unlock(&dev->struct_mutex);
1143         intel_fbc_cleanup_cfb(dev_priv);
1144         i915_gem_cleanup_stolen(dev);
1145
1146         intel_csr_ucode_fini(dev);
1147
1148         intel_teardown_gmbus(dev);
1149         intel_teardown_mchbar(dev);
1150
1151         destroy_workqueue(dev_priv->hotplug.dp_wq);
1152         destroy_workqueue(dev_priv->wq);
1153         destroy_workqueue(dev_priv->gpu_error.hangcheck_wq);
1154         pm_qos_remove_request(&dev_priv->pm_qos);
1155
1156         i915_global_gtt_cleanup(dev);
1157
1158         intel_uncore_fini(dev);
1159         if (dev_priv->regs != NULL)
1160                 pci_iounmap(dev->pdev, dev_priv->regs);
1161
1162         if (dev_priv->requests)
1163                 kmem_cache_destroy(dev_priv->requests);
1164         if (dev_priv->vmas)
1165                 kmem_cache_destroy(dev_priv->vmas);
1166         if (dev_priv->objects)
1167                 kmem_cache_destroy(dev_priv->objects);
1168
1169         pci_dev_put(dev_priv->bridge_dev);
1170         kfree(dev_priv);
1171
1172         return 0;
1173 }
1174
1175 int i915_driver_open(struct drm_device *dev, struct drm_file *file)
1176 {
1177         int ret;
1178
1179         ret = i915_gem_open(dev, file);
1180         if (ret)
1181                 return ret;
1182
1183         return 0;
1184 }
1185
1186 /**
1187  * i915_driver_lastclose - clean up after all DRM clients have exited
1188  * @dev: DRM device
1189  *
1190  * Take care of cleaning up after all DRM clients have exited.  In the
1191  * mode setting case, we want to restore the kernel's initial mode (just
1192  * in case the last client left us in a bad state).
1193  *
1194  * Additionally, in the non-mode setting case, we'll tear down the GTT
1195  * and DMA structures, since the kernel won't be using them, and clea
1196  * up any GEM state.
1197  */
1198 void i915_driver_lastclose(struct drm_device *dev)
1199 {
1200         intel_fbdev_restore_mode(dev);
1201         vga_switcheroo_process_delayed_switch();
1202 }
1203
1204 void i915_driver_preclose(struct drm_device *dev, struct drm_file *file)
1205 {
1206         mutex_lock(&dev->struct_mutex);
1207         i915_gem_context_close(dev, file);
1208         i915_gem_release(dev, file);
1209         mutex_unlock(&dev->struct_mutex);
1210
1211         intel_modeset_preclose(dev, file);
1212 }
1213
1214 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
1215 {
1216         struct drm_i915_file_private *file_priv = file->driver_priv;
1217
1218         if (file_priv && file_priv->bsd_ring)
1219                 file_priv->bsd_ring = NULL;
1220         kfree(file_priv);
1221 }
1222
1223 static int
1224 i915_gem_reject_pin_ioctl(struct drm_device *dev, void *data,
1225                           struct drm_file *file)
1226 {
1227         return -ENODEV;
1228 }
1229
1230 const struct drm_ioctl_desc i915_ioctls[] = {
1231         DRM_IOCTL_DEF_DRV(I915_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1232         DRM_IOCTL_DEF_DRV(I915_FLUSH, drm_noop, DRM_AUTH),
1233         DRM_IOCTL_DEF_DRV(I915_FLIP, drm_noop, DRM_AUTH),
1234         DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, drm_noop, DRM_AUTH),
1235         DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, drm_noop, DRM_AUTH),
1236         DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, drm_noop, DRM_AUTH),
1237         DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH|DRM_RENDER_ALLOW),
1238         DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1239         DRM_IOCTL_DEF_DRV(I915_ALLOC, drm_noop, DRM_AUTH),
1240         DRM_IOCTL_DEF_DRV(I915_FREE, drm_noop, DRM_AUTH),
1241         DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1242         DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, drm_noop, DRM_AUTH),
1243         DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP,  drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1244         DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE,  drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1245         DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE,  drm_noop, DRM_AUTH),
1246         DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, drm_noop, DRM_AUTH),
1247         DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1248         DRM_IOCTL_DEF_DRV(I915_GEM_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
1249         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
1250         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
1251         DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
1252         DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
1253         DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
1254         DRM_IOCTL_DEF_DRV(I915_GEM_SET_CACHING, i915_gem_set_caching_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1255         DRM_IOCTL_DEF_DRV(I915_GEM_GET_CACHING, i915_gem_get_caching_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1256         DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
1257         DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
1258         DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
1259         DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1260         DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1261         DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1262         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1263         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1264         DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1265         DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1266         DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1267         DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1268         DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1269         DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
1270         DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1271         DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
1272         DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
1273         DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
1274         DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
1275         DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
1276         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE, i915_gem_context_create_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1277         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1278         DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1279         DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_get_reset_stats_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1280         DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1281         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_GETPARAM, i915_gem_context_getparam_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1282         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_SETPARAM, i915_gem_context_setparam_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
1283 };
1284
1285 int i915_max_ioctl = ARRAY_SIZE(i915_ioctls);