drivers/gpu/drm/i915/i915_drv.c

   1 /* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- linux-c -*-
   2  */
   3 /*
   4  *
   5  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the
  10  * "Software"), to deal in the Software without restriction, including
  11  * without limitation the rights to use, copy, modify, merge, publish,
  12  * distribute, sub license, and/or sell copies of the Software, and to
  13  * permit persons to whom the Software is furnished to do so, subject to
  14  * the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the
  17  * next paragraph) shall be included in all copies or substantial portions
  18  * of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  23  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  24  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  *
  28  */
  29
  30 #include <linux/acpi.h>
  31 #include <linux/device.h>
  32 #include <linux/oom.h>
  33 #include <linux/module.h>
  34 #include <linux/pci.h>
  35 #include <linux/pm.h>
  36 #include <linux/pm_runtime.h>
  37 #include <linux/pnp.h>
  38 #include <linux/slab.h>
  39 #include <linux/vgaarb.h>
  40 #include <linux/vga_switcheroo.h>
  41 #include <linux/vt.h>
  42 #include <acpi/video.h>
  43
  44 #include <drm/drmP.h>
  45 #include <drm/drm_crtc_helper.h>
  46 #include <drm/i915_drm.h>
  47
  48 #include "i915_drv.h"
  49 #include "i915_trace.h"
  50 #include "i915_vgpu.h"
  51 #include "intel_drv.h"
  52
  53 static struct drm_driver driver;
  54
  55 static unsigned int i915_load_fail_count;
  56
  57 bool __i915_inject_load_failure(const char *func, int line)
  58 {
  59         if (i915_load_fail_count >= i915.inject_load_failure)
  60                 return false;
  61
  62         if (++i915_load_fail_count == i915.inject_load_failure) {
  63                 DRM_INFO("Injecting failure at checkpoint %u [%s:%d]\n",
  64                          i915.inject_load_failure, func, line);
  65                 return true;
  66         }
  67
  68         return false;
  69 }
  70
  71 #define FDO_BUG_URL "https://bugs.freedesktop.org/enter_bug.cgi?product=DRI"
  72 #define FDO_BUG_MSG "Please file a bug at " FDO_BUG_URL " against DRM/Intel " \
  73                     "providing the dmesg log by booting with drm.debug=0xf"
  74
  75 void
  76 __i915_printk(struct drm_i915_private *dev_priv, const char *level,
  77               const char *fmt, ...)
  78 {
  79         static bool shown_bug_once;
  80         struct device *kdev = dev_priv->drm.dev;
  81         bool is_error = level[1] <= KERN_ERR[1];
  82         bool is_debug = level[1] == KERN_DEBUG[1];
  83         struct va_format vaf;
  84         va_list args;
  85
  86         if (is_debug && !(drm_debug & DRM_UT_DRIVER))
  87                 return;
  88
  89         va_start(args, fmt);
  90
  91         vaf.fmt = fmt;
  92         vaf.va = &args;
  93
  94         dev_printk(level, kdev, "[" DRM_NAME ":%ps] %pV",
  95                    __builtin_return_address(0), &vaf);
  96
  97         if (is_error && !shown_bug_once) {
  98                 dev_notice(kdev, "%s", FDO_BUG_MSG);
  99                 shown_bug_once = true;
 100         }
 101
 102         va_end(args);
 103 }
 104
 105 static bool i915_error_injected(struct drm_i915_private *dev_priv)
 106 {
 107         return i915.inject_load_failure &&
 108                i915_load_fail_count == i915.inject_load_failure;
 109 }
 110
 111 #define i915_load_error(dev_priv, fmt, ...)                                  \
 112         __i915_printk(dev_priv,                                              \
 113                       i915_error_injected(dev_priv) ? KERN_DEBUG : KERN_ERR, \
 114                       fmt, ##__VA_ARGS__)
 115
 116
 117 static enum intel_pch intel_virt_detect_pch(struct drm_i915_private *dev_priv)
 118 {
 119         enum intel_pch ret = PCH_NOP;
 120
 121         /*
 122          * In a virtualized passthrough environment we can be in a
 123          * setup where the ISA bridge is not able to be passed through.
 124          * In this case, a south bridge can be emulated and we have to
 125          * make an educated guess as to which PCH is really there.
 126          */
 127
 128         if (IS_GEN5(dev_priv)) {
 129                 ret = PCH_IBX;
 130                 DRM_DEBUG_KMS("Assuming Ibex Peak PCH\n");
 131         } else if (IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv)) {
 132                 ret = PCH_CPT;
 133                 DRM_DEBUG_KMS("Assuming CouarPoint PCH\n");
 134         } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
 135                 ret = PCH_LPT;
 136                 DRM_DEBUG_KMS("Assuming LynxPoint PCH\n");
 137         } else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
 138                 ret = PCH_SPT;
 139                 DRM_DEBUG_KMS("Assuming SunrisePoint PCH\n");
 140         }
 141
 142         return ret;
 143 }
 144
 145 static void intel_detect_pch(struct drm_device *dev)
 146 {
 147         struct drm_i915_private *dev_priv = to_i915(dev);
 148         struct pci_dev *pch = NULL;
 149
 150         /* In all current cases, num_pipes is equivalent to the PCH_NOP setting
 151          * (which really amounts to a PCH but no South Display).
 152          */
 153         if (INTEL_INFO(dev)->num_pipes == 0) {
 154                 dev_priv->pch_type = PCH_NOP;
 155                 return;
 156         }
 157
 158         /*
 159          * The reason to probe ISA bridge instead of Dev31:Fun0 is to
 160          * make graphics device passthrough work easy for VMM, that only
 161          * need to expose ISA bridge to let driver know the real hardware
 162          * underneath. This is a requirement from virtualization team.
 163          *
 164          * In some virtualized environments (e.g. XEN), there is irrelevant
 165          * ISA bridge in the system. To work reliably, we should scan trhough
 166          * all the ISA bridge devices and check for the first match, instead
 167          * of only checking the first one.
 168          */
 169         while ((pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, pch))) {
 170                 if (pch->vendor == PCI_VENDOR_ID_INTEL) {
 171                         unsigned short id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
 172                         dev_priv->pch_id = id;
 173
 174                         if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {
 175                                 dev_priv->pch_type = PCH_IBX;
 176                                 DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
 177                                 WARN_ON(!IS_GEN5(dev_priv));
 178                         } else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
 179                                 dev_priv->pch_type = PCH_CPT;
 180                                 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
 181                                 WARN_ON(!(IS_GEN6(dev_priv) ||
 182                                         IS_IVYBRIDGE(dev_priv)));
 183                         } else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {
 184                                 /* PantherPoint is CPT compatible */
 185                                 dev_priv->pch_type = PCH_CPT;
 186                                 DRM_DEBUG_KMS("Found PantherPoint PCH\n");
 187                                 WARN_ON(!(IS_GEN6(dev_priv) ||
 188                                         IS_IVYBRIDGE(dev_priv)));
 189                         } else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
 190                                 dev_priv->pch_type = PCH_LPT;
 191                                 DRM_DEBUG_KMS("Found LynxPoint PCH\n");
 192                                 WARN_ON(!IS_HASWELL(dev_priv) &&
 193                                         !IS_BROADWELL(dev_priv));
 194                                 WARN_ON(IS_HSW_ULT(dev_priv) ||
 195                                         IS_BDW_ULT(dev_priv));
 196                         } else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
 197                                 dev_priv->pch_type = PCH_LPT;
 198                                 DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
 199                                 WARN_ON(!IS_HASWELL(dev_priv) &&
 200                                         !IS_BROADWELL(dev_priv));
 201                                 WARN_ON(!IS_HSW_ULT(dev_priv) &&
 202                                         !IS_BDW_ULT(dev_priv));
 203                         } else if (id == INTEL_PCH_SPT_DEVICE_ID_TYPE) {
 204                                 dev_priv->pch_type = PCH_SPT;
 205                                 DRM_DEBUG_KMS("Found SunrisePoint PCH\n");
 206                                 WARN_ON(!IS_SKYLAKE(dev_priv) &&
 207                                         !IS_KABYLAKE(dev_priv));
 208                         } else if (id == INTEL_PCH_SPT_LP_DEVICE_ID_TYPE) {
 209                                 dev_priv->pch_type = PCH_SPT;
 210                                 DRM_DEBUG_KMS("Found SunrisePoint LP PCH\n");
 211                                 WARN_ON(!IS_SKYLAKE(dev_priv) &&
 212                                         !IS_KABYLAKE(dev_priv));
 213                         } else if (id == INTEL_PCH_KBP_DEVICE_ID_TYPE) {
 214                                 dev_priv->pch_type = PCH_KBP;
 215                                 DRM_DEBUG_KMS("Found KabyPoint PCH\n");
 216                                 WARN_ON(!IS_KABYLAKE(dev_priv));
 217                         } else if ((id == INTEL_PCH_P2X_DEVICE_ID_TYPE) ||
 218                                    (id == INTEL_PCH_P3X_DEVICE_ID_TYPE) ||
 219                                    ((id == INTEL_PCH_QEMU_DEVICE_ID_TYPE) &&
 220                                     pch->subsystem_vendor ==
 221                                             PCI_SUBVENDOR_ID_REDHAT_QUMRANET &&
 222                                     pch->subsystem_device ==
 223                                             PCI_SUBDEVICE_ID_QEMU)) {
 224                                 dev_priv->pch_type =
 225                                         intel_virt_detect_pch(dev_priv);
 226                         } else
 227                                 continue;
 228
 229                         break;
 230                 }
 231         }
 232         if (!pch)
 233                 DRM_DEBUG_KMS("No PCH found.\n");
 234
 235         pci_dev_put(pch);
 236 }
 237
 238 static int i915_getparam(struct drm_device *dev, void *data,
 239                          struct drm_file *file_priv)
 240 {
 241         struct drm_i915_private *dev_priv = to_i915(dev);
 242         struct pci_dev *pdev = dev_priv->drm.pdev;
 243         drm_i915_getparam_t *param = data;
 244         int value;
 245
 246         switch (param->param) {
 247         case I915_PARAM_IRQ_ACTIVE:
 248         case I915_PARAM_ALLOW_BATCHBUFFER:
 249         case I915_PARAM_LAST_DISPATCH:
 250                 /* Reject all old ums/dri params. */
 251                 return -ENODEV;
 252         case I915_PARAM_CHIPSET_ID:
 253                 value = pdev->device;
 254                 break;
 255         case I915_PARAM_REVISION:
 256                 value = pdev->revision;
 257                 break;
 258         case I915_PARAM_NUM_FENCES_AVAIL:
 259                 value = dev_priv->num_fence_regs;
 260                 break;
 261         case I915_PARAM_HAS_OVERLAY:
 262                 value = dev_priv->overlay ? 1 : 0;
 263                 break;
 264         case I915_PARAM_HAS_BSD:
 265                 value = !!dev_priv->engine[VCS];
 266                 break;
 267         case I915_PARAM_HAS_BLT:
 268                 value = !!dev_priv->engine[BCS];
 269                 break;
 270         case I915_PARAM_HAS_VEBOX:
 271                 value = !!dev_priv->engine[VECS];
 272                 break;
 273         case I915_PARAM_HAS_BSD2:
 274                 value = !!dev_priv->engine[VCS2];
 275                 break;
 276         case I915_PARAM_HAS_EXEC_CONSTANTS:
 277                 value = INTEL_GEN(dev_priv) >= 4;
 278                 break;
 279         case I915_PARAM_HAS_LLC:
 280                 value = HAS_LLC(dev_priv);
 281                 break;
 282         case I915_PARAM_HAS_WT:
 283                 value = HAS_WT(dev_priv);
 284                 break;
 285         case I915_PARAM_HAS_ALIASING_PPGTT:
 286                 value = USES_PPGTT(dev_priv);
 287                 break;
 288         case I915_PARAM_HAS_SEMAPHORES:
 289                 value = i915.semaphores;
 290                 break;
 291         case I915_PARAM_HAS_SECURE_BATCHES:
 292                 value = capable(CAP_SYS_ADMIN);
 293                 break;
 294         case I915_PARAM_CMD_PARSER_VERSION:
 295                 value = i915_cmd_parser_get_version(dev_priv);
 296                 break;
 297         case I915_PARAM_SUBSLICE_TOTAL:
 298                 value = sseu_subslice_total(&INTEL_INFO(dev_priv)->sseu);
 299                 if (!value)
 300                         return -ENODEV;
 301                 break;
 302         case I915_PARAM_EU_TOTAL:
 303                 value = INTEL_INFO(dev_priv)->sseu.eu_total;
 304                 if (!value)
 305                         return -ENODEV;
 306                 break;
 307         case I915_PARAM_HAS_GPU_RESET:
 308                 value = i915.enable_hangcheck && intel_has_gpu_reset(dev_priv);
 309                 break;
 310         case I915_PARAM_HAS_RESOURCE_STREAMER:
 311                 value = HAS_RESOURCE_STREAMER(dev_priv);
 312                 break;
 313         case I915_PARAM_HAS_POOLED_EU:
 314                 value = HAS_POOLED_EU(dev_priv);
 315                 break;
 316         case I915_PARAM_MIN_EU_IN_POOL:
 317                 value = INTEL_INFO(dev_priv)->sseu.min_eu_in_pool;
 318                 break;
 319         case I915_PARAM_MMAP_GTT_VERSION:
 320                 /* Though we've started our numbering from 1, and so class all
 321                  * earlier versions as 0, in effect their value is undefined as
 322                  * the ioctl will report EINVAL for the unknown param!
 323                  */
 324                 value = i915_gem_mmap_gtt_version();
 325                 break;
 326         case I915_PARAM_MMAP_VERSION:
 327                 /* Remember to bump this if the version changes! */
 328         case I915_PARAM_HAS_GEM:
 329         case I915_PARAM_HAS_PAGEFLIPPING:
 330         case I915_PARAM_HAS_EXECBUF2: /* depends on GEM */
 331         case I915_PARAM_HAS_RELAXED_FENCING:
 332         case I915_PARAM_HAS_COHERENT_RINGS:
 333         case I915_PARAM_HAS_RELAXED_DELTA:
 334         case I915_PARAM_HAS_GEN7_SOL_RESET:
 335         case I915_PARAM_HAS_WAIT_TIMEOUT:
 336         case I915_PARAM_HAS_PRIME_VMAP_FLUSH:
 337         case I915_PARAM_HAS_PINNED_BATCHES:
 338         case I915_PARAM_HAS_EXEC_NO_RELOC:
 339         case I915_PARAM_HAS_EXEC_HANDLE_LUT:
 340         case I915_PARAM_HAS_COHERENT_PHYS_GTT:
 341         case I915_PARAM_HAS_EXEC_SOFTPIN:
 342                 /* For the time being all of these are always true;
 343                  * if some supported hardware does not have one of these
 344                  * features this value needs to be provided from
 345                  * INTEL_INFO(), a feature macro, or similar.
 346                  */
 347                 value = 1;
 348                 break;
 349         default:
 350                 DRM_DEBUG("Unknown parameter %d\n", param->param);
 351                 return -EINVAL;
 352         }
 353
 354         if (put_user(value, param->value))
 355                 return -EFAULT;
 356
 357         return 0;
 358 }
 359
 360 static int i915_get_bridge_dev(struct drm_device *dev)
 361 {
 362         struct drm_i915_private *dev_priv = to_i915(dev);
 363
 364         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
 365         if (!dev_priv->bridge_dev) {
 366                 DRM_ERROR("bridge device not found\n");
 367                 return -1;
 368         }
 369         return 0;
 370 }
 371
 372 /* Allocate space for the MCH regs if needed, return nonzero on error */
 373 static int
 374 intel_alloc_mchbar_resource(struct drm_device *dev)
 375 {
 376         struct drm_i915_private *dev_priv = to_i915(dev);
 377         int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 378         u32 temp_lo, temp_hi = 0;
 379         u64 mchbar_addr;
 380         int ret;
 381
 382         if (INTEL_INFO(dev)->gen >= 4)
 383                 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
 384         pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
 385         mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
 386
 387         /* If ACPI doesn't have it, assume we need to allocate it ourselves */
 388 #ifdef CONFIG_PNP
 389         if (mchbar_addr &&
 390             pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
 391                 return 0;
 392 #endif
 393
 394         /* Get some space for it */
 395         dev_priv->mch_res.name = "i915 MCHBAR";
 396         dev_priv->mch_res.flags = IORESOURCE_MEM;
 397         ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
 398                                      &dev_priv->mch_res,
 399                                      MCHBAR_SIZE, MCHBAR_SIZE,
 400                                      PCIBIOS_MIN_MEM,
 401                                      0, pcibios_align_resource,
 402                                      dev_priv->bridge_dev);
 403         if (ret) {
 404                 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
 405                 dev_priv->mch_res.start = 0;
 406                 return ret;
 407         }
 408
 409         if (INTEL_INFO(dev)->gen >= 4)
 410                 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
 411                                        upper_32_bits(dev_priv->mch_res.start));
 412
 413         pci_write_config_dword(dev_priv->bridge_dev, reg,
 414                                lower_32_bits(dev_priv->mch_res.start));
 415         return 0;
 416 }
 417
 418 /* Setup MCHBAR if possible, return true if we should disable it again */
 419 static void
 420 intel_setup_mchbar(struct drm_device *dev)
 421 {
 422         struct drm_i915_private *dev_priv = to_i915(dev);
 423         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 424         u32 temp;
 425         bool enabled;
 426
 427         if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 428                 return;
 429
 430         dev_priv->mchbar_need_disable = false;
 431
 432         if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
 433                 pci_read_config_dword(dev_priv->bridge_dev, DEVEN, &temp);
 434                 enabled = !!(temp & DEVEN_MCHBAR_EN);
 435         } else {
 436                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 437                 enabled = temp & 1;
 438         }
 439
 440         /* If it's already enabled, don't have to do anything */
 441         if (enabled)
 442                 return;
 443
 444         if (intel_alloc_mchbar_resource(dev))
 445                 return;
 446
 447         dev_priv->mchbar_need_disable = true;
 448
 449         /* Space is allocated or reserved, so enable it. */
 450         if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
 451                 pci_write_config_dword(dev_priv->bridge_dev, DEVEN,
 452                                        temp | DEVEN_MCHBAR_EN);
 453         } else {
 454                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 455                 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
 456         }
 457 }
 458
 459 static void
 460 intel_teardown_mchbar(struct drm_device *dev)
 461 {
 462         struct drm_i915_private *dev_priv = to_i915(dev);
 463         int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 464
 465         if (dev_priv->mchbar_need_disable) {
 466                 if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
 467                         u32 deven_val;
 468
 469                         pci_read_config_dword(dev_priv->bridge_dev, DEVEN,
 470                                               &deven_val);
 471                         deven_val &= ~DEVEN_MCHBAR_EN;
 472                         pci_write_config_dword(dev_priv->bridge_dev, DEVEN,
 473                                                deven_val);
 474                 } else {
 475                         u32 mchbar_val;
 476
 477                         pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg,
 478                                               &mchbar_val);
 479                         mchbar_val &= ~1;
 480                         pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg,
 481                                                mchbar_val);
 482                 }
 483         }
 484
 485         if (dev_priv->mch_res.start)
 486                 release_resource(&dev_priv->mch_res);
 487 }
 488
 489 /* true = enable decode, false = disable decoder */
 490 static unsigned int i915_vga_set_decode(void *cookie, bool state)
 491 {
 492         struct drm_device *dev = cookie;
 493
 494         intel_modeset_vga_set_state(dev, state);
 495         if (state)
 496                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
 497                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
 498         else
 499                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
 500 }
 501
 502 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
 503 {
 504         struct drm_device *dev = pci_get_drvdata(pdev);
 505         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
 506
 507         if (state == VGA_SWITCHEROO_ON) {
 508                 pr_info("switched on\n");
 509                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 510                 /* i915 resume handler doesn't set to D0 */
 511                 pci_set_power_state(pdev, PCI_D0);
 512                 i915_resume_switcheroo(dev);
 513                 dev->switch_power_state = DRM_SWITCH_POWER_ON;
 514         } else {
 515                 pr_info("switched off\n");
 516                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 517                 i915_suspend_switcheroo(dev, pmm);
 518                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
 519         }
 520 }
 521
 522 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
 523 {
 524         struct drm_device *dev = pci_get_drvdata(pdev);
 525
 526         /*
 527          * FIXME: open_count is protected by drm_global_mutex but that would lead to
 528          * locking inversion with the driver load path. And the access here is
 529          * completely racy anyway. So don't bother with locking for now.
 530          */
 531         return dev->open_count == 0;
 532 }
 533
 534 static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
 535         .set_gpu_state = i915_switcheroo_set_state,
 536         .reprobe = NULL,
 537         .can_switch = i915_switcheroo_can_switch,
 538 };
 539
 540 static void i915_gem_fini(struct drm_device *dev)
 541 {
 542         mutex_lock(&dev->struct_mutex);
 543         i915_gem_cleanup_engines(dev);
 544         i915_gem_context_fini(dev);
 545         mutex_unlock(&dev->struct_mutex);
 546
 547         WARN_ON(!list_empty(&to_i915(dev)->context_list));
 548 }
 549
 550 static int i915_load_modeset_init(struct drm_device *dev)
 551 {
 552         struct drm_i915_private *dev_priv = to_i915(dev);
 553         struct pci_dev *pdev = dev_priv->drm.pdev;
 554         int ret;
 555
 556         if (i915_inject_load_failure())
 557                 return -ENODEV;
 558
 559         ret = intel_bios_init(dev_priv);
 560         if (ret)
 561                 DRM_INFO("failed to find VBIOS tables\n");
 562
 563         /* If we have > 1 VGA cards, then we need to arbitrate access
 564          * to the common VGA resources.
 565          *
 566          * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
 567          * then we do not take part in VGA arbitration and the
 568          * vga_client_register() fails with -ENODEV.
 569          */
 570         ret = vga_client_register(pdev, dev, NULL, i915_vga_set_decode);
 571         if (ret && ret != -ENODEV)
 572                 goto out;
 573
 574         intel_register_dsm_handler();
 575
 576         ret = vga_switcheroo_register_client(pdev, &i915_switcheroo_ops, false);
 577         if (ret)
 578                 goto cleanup_vga_client;
 579
 580         /* must happen before intel_power_domains_init_hw() on VLV/CHV */
 581         intel_update_rawclk(dev_priv);
 582
 583         intel_power_domains_init_hw(dev_priv, false);
 584
 585         intel_csr_ucode_init(dev_priv);
 586
 587         ret = intel_irq_install(dev_priv);
 588         if (ret)
 589                 goto cleanup_csr;
 590
 591         intel_setup_gmbus(dev);
 592
 593         /* Important: The output setup functions called by modeset_init need
 594          * working irqs for e.g. gmbus and dp aux transfers. */
 595         intel_modeset_init(dev);
 596
 597         intel_guc_init(dev);
 598
 599         ret = i915_gem_init(dev);
 600         if (ret)
 601                 goto cleanup_irq;
 602
 603         intel_modeset_gem_init(dev);
 604
 605         if (INTEL_INFO(dev)->num_pipes == 0)
 606                 return 0;
 607
 608         ret = intel_fbdev_init(dev);
 609         if (ret)
 610                 goto cleanup_gem;
 611
 612         /* Only enable hotplug handling once the fbdev is fully set up. */
 613         intel_hpd_init(dev_priv);
 614
 615         drm_kms_helper_poll_init(dev);
 616
 617         return 0;
 618
 619 cleanup_gem:
 620         if (i915_gem_suspend(dev))
 621                 DRM_ERROR("failed to idle hardware; continuing to unload!\n");
 622         i915_gem_fini(dev);
 623 cleanup_irq:
 624         intel_guc_fini(dev);
 625         drm_irq_uninstall(dev);
 626         intel_teardown_gmbus(dev);
 627 cleanup_csr:
 628         intel_csr_ucode_fini(dev_priv);
 629         intel_power_domains_fini(dev_priv);
 630         vga_switcheroo_unregister_client(pdev);
 631 cleanup_vga_client:
 632         vga_client_register(pdev, NULL, NULL, NULL);
 633 out:
 634         return ret;
 635 }
 636
 637 #if IS_ENABLED(CONFIG_FB)
 638 static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
 639 {
 640         struct apertures_struct *ap;
 641         struct pci_dev *pdev = dev_priv->drm.pdev;
 642         struct i915_ggtt *ggtt = &dev_priv->ggtt;
 643         bool primary;
 644         int ret;
 645
 646         ap = alloc_apertures(1);
 647         if (!ap)
 648                 return -ENOMEM;
 649
 650         ap->ranges[0].base = ggtt->mappable_base;
 651         ap->ranges[0].size = ggtt->mappable_end;
 652
 653         primary =
 654                 pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
 655
 656         ret = drm_fb_helper_remove_conflicting_framebuffers(ap, "inteldrmfb", primary);
 657
 658         kfree(ap);
 659
 660         return ret;
 661 }
 662 #else
 663 static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
 664 {
 665         return 0;
 666 }
 667 #endif
 668
 669 #if !defined(CONFIG_VGA_CONSOLE)
 670 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
 671 {
 672         return 0;
 673 }
 674 #elif !defined(CONFIG_DUMMY_CONSOLE)
 675 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
 676 {
 677         return -ENODEV;
 678 }
 679 #else
 680 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
 681 {
 682         int ret = 0;
 683
 684         DRM_INFO("Replacing VGA console driver\n");
 685
 686         console_lock();
 687         if (con_is_bound(&vga_con))
 688                 ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
 689         if (ret == 0) {
 690                 ret = do_unregister_con_driver(&vga_con);
 691
 692                 /* Ignore "already unregistered". */
 693                 if (ret == -ENODEV)
 694                         ret = 0;
 695         }
 696         console_unlock();
 697
 698         return ret;
 699 }
 700 #endif
 701
 702 static void intel_init_dpio(struct drm_i915_private *dev_priv)
 703 {
 704         /*
 705          * IOSF_PORT_DPIO is used for VLV x2 PHY (DP/HDMI B and C),
 706          * CHV x1 PHY (DP/HDMI D)
 707          * IOSF_PORT_DPIO_2 is used for CHV x2 PHY (DP/HDMI B and C)
 708          */
 709         if (IS_CHERRYVIEW(dev_priv)) {
 710                 DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO_2;
 711                 DPIO_PHY_IOSF_PORT(DPIO_PHY1) = IOSF_PORT_DPIO;
 712         } else if (IS_VALLEYVIEW(dev_priv)) {
 713                 DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO;
 714         }
 715 }
 716
 717 static int i915_workqueues_init(struct drm_i915_private *dev_priv)
 718 {
 719         /*
 720          * The i915 workqueue is primarily used for batched retirement of
 721          * requests (and thus managing bo) once the task has been completed
 722          * by the GPU. i915_gem_retire_requests() is called directly when we
 723          * need high-priority retirement, such as waiting for an explicit
 724          * bo.
 725          *
 726          * It is also used for periodic low-priority events, such as
 727          * idle-timers and recording error state.
 728          *
 729          * All tasks on the workqueue are expected to acquire the dev mutex
 730          * so there is no point in running more than one instance of the
 731          * workqueue at any time.  Use an ordered one.
 732          */
 733         dev_priv->wq = alloc_ordered_workqueue("i915", 0);
 734         if (dev_priv->wq == NULL)
 735                 goto out_err;
 736
 737         dev_priv->hotplug.dp_wq = alloc_ordered_workqueue("i915-dp", 0);
 738         if (dev_priv->hotplug.dp_wq == NULL)
 739                 goto out_free_wq;
 740
 741         return 0;
 742
 743 out_free_wq:
 744         destroy_workqueue(dev_priv->wq);
 745 out_err:
 746         DRM_ERROR("Failed to allocate workqueues.\n");
 747
 748         return -ENOMEM;
 749 }
 750
 751 static void i915_workqueues_cleanup(struct drm_i915_private *dev_priv)
 752 {
 753         destroy_workqueue(dev_priv->hotplug.dp_wq);
 754         destroy_workqueue(dev_priv->wq);
 755 }
 756
 757 /*
 758  * We don't keep the workarounds for pre-production hardware, so we expect our
 759  * driver to fail on these machines in one way or another. A little warning on
 760  * dmesg may help both the user and the bug triagers.
 761  */
 762 static void intel_detect_preproduction_hw(struct drm_i915_private *dev_priv)
 763 {
 764         if (IS_HSW_EARLY_SDV(dev_priv) ||
 765             IS_SKL_REVID(dev_priv, 0, SKL_REVID_F0))
 766                 DRM_ERROR("This is a pre-production stepping. "
 767                           "It may not be fully functional.\n");
 768 }
 769
 770 /**
 771  * i915_driver_init_early - setup state not requiring device access
 772  * @dev_priv: device private
 773  *
 774  * Initialize everything that is a "SW-only" state, that is state not
 775  * requiring accessing the device or exposing the driver via kernel internal
 776  * or userspace interfaces. Example steps belonging here: lock initialization,
 777  * system memory allocation, setting up device specific attributes and
 778  * function hooks not requiring accessing the device.
 779  */
 780 static int i915_driver_init_early(struct drm_i915_private *dev_priv,
 781                                   const struct pci_device_id *ent)
 782 {
 783         const struct intel_device_info *match_info =
 784                 (struct intel_device_info *)ent->driver_data;
 785         struct intel_device_info *device_info;
 786         int ret = 0;
 787
 788         if (i915_inject_load_failure())
 789                 return -ENODEV;
 790
 791         /* Setup the write-once "constant" device info */
 792         device_info = mkwrite_device_info(dev_priv);
 793         memcpy(device_info, match_info, sizeof(*device_info));
 794         device_info->device_id = dev_priv->drm.pdev->device;
 795
 796         BUG_ON(device_info->gen > sizeof(device_info->gen_mask) * BITS_PER_BYTE);
 797         device_info->gen_mask = BIT(device_info->gen - 1);
 798
 799         spin_lock_init(&dev_priv->irq_lock);
 800         spin_lock_init(&dev_priv->gpu_error.lock);
 801         mutex_init(&dev_priv->backlight_lock);
 802         spin_lock_init(&dev_priv->uncore.lock);
 803         spin_lock_init(&dev_priv->mm.object_stat_lock);
 804         spin_lock_init(&dev_priv->mmio_flip_lock);
 805         mutex_init(&dev_priv->sb_lock);
 806         mutex_init(&dev_priv->modeset_restore_lock);
 807         mutex_init(&dev_priv->av_mutex);
 808         mutex_init(&dev_priv->wm.wm_mutex);
 809         mutex_init(&dev_priv->pps_mutex);
 810
 811         i915_memcpy_init_early(dev_priv);
 812
 813         ret = i915_workqueues_init(dev_priv);
 814         if (ret < 0)
 815                 return ret;
 816
 817         ret = intel_gvt_init(dev_priv);
 818         if (ret < 0)
 819                 goto err_workqueues;
 820
 821         /* This must be called before any calls to HAS_PCH_* */
 822         intel_detect_pch(&dev_priv->drm);
 823
 824         intel_pm_setup(&dev_priv->drm);
 825         intel_init_dpio(dev_priv);
 826         intel_power_domains_init(dev_priv);
 827         intel_irq_init(dev_priv);
 828         intel_init_display_hooks(dev_priv);
 829         intel_init_clock_gating_hooks(dev_priv);
 830         intel_init_audio_hooks(dev_priv);
 831         i915_gem_load_init(&dev_priv->drm);
 832
 833         intel_display_crc_init(dev_priv);
 834
 835         intel_device_info_dump(dev_priv);
 836
 837         intel_detect_preproduction_hw(dev_priv);
 838
 839         return 0;
 840
 841 err_workqueues:
 842         i915_workqueues_cleanup(dev_priv);
 843         return ret;
 844 }
 845
 846 /**
 847  * i915_driver_cleanup_early - cleanup the setup done in i915_driver_init_early()
 848  * @dev_priv: device private
 849  */
 850 static void i915_driver_cleanup_early(struct drm_i915_private *dev_priv)
 851 {
 852         i915_gem_load_cleanup(&dev_priv->drm);
 853         i915_workqueues_cleanup(dev_priv);
 854 }
 855
 856 static int i915_mmio_setup(struct drm_device *dev)
 857 {
 858         struct drm_i915_private *dev_priv = to_i915(dev);
 859         struct pci_dev *pdev = dev_priv->drm.pdev;
 860         int mmio_bar;
 861         int mmio_size;
 862
 863         mmio_bar = IS_GEN2(dev_priv) ? 1 : 0;
 864         /*
 865          * Before gen4, the registers and the GTT are behind different BARs.
 866          * However, from gen4 onwards, the registers and the GTT are shared
 867          * in the same BAR, so we want to restrict this ioremap from
 868          * clobbering the GTT which we want ioremap_wc instead. Fortunately,
 869          * the register BAR remains the same size for all the earlier
 870          * generations up to Ironlake.
 871          */
 872         if (INTEL_INFO(dev)->gen < 5)
 873                 mmio_size = 512 * 1024;
 874         else
 875                 mmio_size = 2 * 1024 * 1024;
 876         dev_priv->regs = pci_iomap(pdev, mmio_bar, mmio_size);
 877         if (dev_priv->regs == NULL) {
 878                 DRM_ERROR("failed to map registers\n");
 879
 880                 return -EIO;
 881         }
 882
 883         /* Try to make sure MCHBAR is enabled before poking at it */
 884         intel_setup_mchbar(dev);
 885
 886         return 0;
 887 }
 888
 889 static void i915_mmio_cleanup(struct drm_device *dev)
 890 {
 891         struct drm_i915_private *dev_priv = to_i915(dev);
 892         struct pci_dev *pdev = dev_priv->drm.pdev;
 893
 894         intel_teardown_mchbar(dev);
 895         pci_iounmap(pdev, dev_priv->regs);
 896 }
 897
 898 /**
 899  * i915_driver_init_mmio - setup device MMIO
 900  * @dev_priv: device private
 901  *
 902  * Setup minimal device state necessary for MMIO accesses later in the
 903  * initialization sequence. The setup here should avoid any other device-wide
 904  * side effects or exposing the driver via kernel internal or user space
 905  * interfaces.
 906  */
 907 static int i915_driver_init_mmio(struct drm_i915_private *dev_priv)
 908 {
 909         struct drm_device *dev = &dev_priv->drm;
 910         int ret;
 911
 912         if (i915_inject_load_failure())
 913                 return -ENODEV;
 914
 915         if (i915_get_bridge_dev(dev))
 916                 return -EIO;
 917
 918         ret = i915_mmio_setup(dev);
 919         if (ret < 0)
 920                 goto put_bridge;
 921
 922         intel_uncore_init(dev_priv);
 923
 924         return 0;
 925
 926 put_bridge:
 927         pci_dev_put(dev_priv->bridge_dev);
 928
 929         return ret;
 930 }
 931
 932 /**
 933  * i915_driver_cleanup_mmio - cleanup the setup done in i915_driver_init_mmio()
 934  * @dev_priv: device private
 935  */
 936 static void i915_driver_cleanup_mmio(struct drm_i915_private *dev_priv)
 937 {
 938         struct drm_device *dev = &dev_priv->drm;
 939
 940         intel_uncore_fini(dev_priv);
 941         i915_mmio_cleanup(dev);
 942         pci_dev_put(dev_priv->bridge_dev);
 943 }
 944
 945 static void intel_sanitize_options(struct drm_i915_private *dev_priv)
 946 {
 947         i915.enable_execlists =
 948                 intel_sanitize_enable_execlists(dev_priv,
 949                                                 i915.enable_execlists);
 950
 951         /*
 952          * i915.enable_ppgtt is read-only, so do an early pass to validate the
 953          * user's requested state against the hardware/driver capabilities.  We
 954          * do this now so that we can print out any log messages once rather
 955          * than every time we check intel_enable_ppgtt().
 956          */
 957         i915.enable_ppgtt =
 958                 intel_sanitize_enable_ppgtt(dev_priv, i915.enable_ppgtt);
 959         DRM_DEBUG_DRIVER("ppgtt mode: %i\n", i915.enable_ppgtt);
 960
 961         i915.semaphores = intel_sanitize_semaphores(dev_priv, i915.semaphores);
 962         DRM_DEBUG_DRIVER("use GPU sempahores? %s\n", yesno(i915.semaphores));
 963 }
 964
 965 /**
 966  * i915_driver_init_hw - setup state requiring device access
 967  * @dev_priv: device private
 968  *
 969  * Setup state that requires accessing the device, but doesn't require
 970  * exposing the driver via kernel internal or userspace interfaces.
 971  */
 972 static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
 973 {
 974         struct pci_dev *pdev = dev_priv->drm.pdev;
 975         struct drm_device *dev = &dev_priv->drm;
 976         int ret;
 977
 978         if (i915_inject_load_failure())
 979                 return -ENODEV;
 980
 981         intel_device_info_runtime_init(dev_priv);
 982
 983         intel_sanitize_options(dev_priv);
 984
 985         ret = i915_ggtt_probe_hw(dev_priv);
 986         if (ret)
 987                 return ret;
 988
 989         /* WARNING: Apparently we must kick fbdev drivers before vgacon,
 990          * otherwise the vga fbdev driver falls over. */
 991         ret = i915_kick_out_firmware_fb(dev_priv);
 992         if (ret) {
 993                 DRM_ERROR("failed to remove conflicting framebuffer drivers\n");
 994                 goto out_ggtt;
 995         }
 996
 997         ret = i915_kick_out_vgacon(dev_priv);
 998         if (ret) {
 999                 DRM_ERROR("failed to remove conflicting VGA console\n");
1000                 goto out_ggtt;
1001         }
1002
1003         ret = i915_ggtt_init_hw(dev_priv);
1004         if (ret)
1005                 return ret;
1006
1007         ret = i915_ggtt_enable_hw(dev_priv);
1008         if (ret) {
1009                 DRM_ERROR("failed to enable GGTT\n");
1010                 goto out_ggtt;
1011         }
1012
1013         pci_set_master(pdev);
1014
1015         /* overlay on gen2 is broken and can't address above 1G */
1016         if (IS_GEN2(dev_priv)) {
1017                 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(30));
1018                 if (ret) {
1019                         DRM_ERROR("failed to set DMA mask\n");
1020
1021                         goto out_ggtt;
1022                 }
1023         }
1024
1025         /* 965GM sometimes incorrectly writes to hardware status page (HWS)
1026          * using 32bit addressing, overwriting memory if HWS is located
1027          * above 4GB.
1028          *
1029          * The documentation also mentions an issue with undefined
1030          * behaviour if any general state is accessed within a page above 4GB,
1031          * which also needs to be handled carefully.
1032          */
1033         if (IS_BROADWATER(dev) || IS_CRESTLINE(dev)) {
1034                 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1035
1036                 if (ret) {
1037                         DRM_ERROR("failed to set DMA mask\n");
1038
1039                         goto out_ggtt;
1040                 }
1041         }
1042
1043         pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY,
1044                            PM_QOS_DEFAULT_VALUE);
1045
1046         intel_uncore_sanitize(dev_priv);
1047
1048         intel_opregion_setup(dev_priv);
1049
1050         i915_gem_load_init_fences(dev_priv);
1051
1052         /* On the 945G/GM, the chipset reports the MSI capability on the
1053          * integrated graphics even though the support isn't actually there
1054          * according to the published specs.  It doesn't appear to function
1055          * correctly in testing on 945G.
1056          * This may be a side effect of MSI having been made available for PEG
1057          * and the registers being closely associated.
1058          *
1059          * According to chipset errata, on the 965GM, MSI interrupts may
1060          * be lost or delayed, but we use them anyways to avoid
1061          * stuck interrupts on some machines.
1062          */
1063         if (!IS_I945G(dev_priv) && !IS_I945GM(dev_priv)) {
1064                 if (pci_enable_msi(pdev) < 0)
1065                         DRM_DEBUG_DRIVER("can't enable MSI");
1066         }
1067
1068         return 0;
1069
1070 out_ggtt:
1071         i915_ggtt_cleanup_hw(dev_priv);
1072
1073         return ret;
1074 }
1075
1076 /**
1077  * i915_driver_cleanup_hw - cleanup the setup done in i915_driver_init_hw()
1078  * @dev_priv: device private
1079  */
1080 static void i915_driver_cleanup_hw(struct drm_i915_private *dev_priv)
1081 {
1082         struct pci_dev *pdev = dev_priv->drm.pdev;
1083
1084         if (pdev->msi_enabled)
1085                 pci_disable_msi(pdev);
1086
1087         pm_qos_remove_request(&dev_priv->pm_qos);
1088         i915_ggtt_cleanup_hw(dev_priv);
1089 }
1090
1091 /**
1092  * i915_driver_register - register the driver with the rest of the system
1093  * @dev_priv: device private
1094  *
1095  * Perform any steps necessary to make the driver available via kernel
1096  * internal or userspace interfaces.
1097  */
1098 static void i915_driver_register(struct drm_i915_private *dev_priv)
1099 {
1100         struct drm_device *dev = &dev_priv->drm;
1101
1102         i915_gem_shrinker_init(dev_priv);
1103
1104         /*
1105          * Notify a valid surface after modesetting,
1106          * when running inside a VM.
1107          */
1108         if (intel_vgpu_active(dev_priv))
1109                 I915_WRITE(vgtif_reg(display_ready), VGT_DRV_DISPLAY_READY);
1110
1111         /* Reveal our presence to userspace */
1112         if (drm_dev_register(dev, 0) == 0) {
1113                 i915_debugfs_register(dev_priv);
1114                 i915_setup_sysfs(dev_priv);
1115         } else
1116                 DRM_ERROR("Failed to register driver for userspace access!\n");
1117
1118         if (INTEL_INFO(dev_priv)->num_pipes) {
1119                 /* Must be done after probing outputs */
1120                 intel_opregion_register(dev_priv);
1121                 acpi_video_register();
1122         }
1123
1124         if (IS_GEN5(dev_priv))
1125                 intel_gpu_ips_init(dev_priv);
1126
1127         i915_audio_component_init(dev_priv);
1128
1129         /*
1130          * Some ports require correctly set-up hpd registers for detection to
1131          * work properly (leading to ghost connected connector status), e.g. VGA
1132          * on gm45.  Hence we can only set up the initial fbdev config after hpd
1133          * irqs are fully enabled. We do it last so that the async config
1134          * cannot run before the connectors are registered.
1135          */
1136         intel_fbdev_initial_config_async(dev);
1137 }
1138
1139 /**
1140  * i915_driver_unregister - cleanup the registration done in i915_driver_regiser()
1141  * @dev_priv: device private
1142  */
1143 static void i915_driver_unregister(struct drm_i915_private *dev_priv)
1144 {
1145         i915_audio_component_cleanup(dev_priv);
1146
1147         intel_gpu_ips_teardown();
1148         acpi_video_unregister();
1149         intel_opregion_unregister(dev_priv);
1150
1151         i915_teardown_sysfs(dev_priv);
1152         i915_debugfs_unregister(dev_priv);
1153         drm_dev_unregister(&dev_priv->drm);
1154
1155         i915_gem_shrinker_cleanup(dev_priv);
1156 }
1157
1158 /**
1159  * i915_driver_load - setup chip and create an initial config
1160  * @dev: DRM device
1161  * @flags: startup flags
1162  *
1163  * The driver load routine has to do several things:
1164  *   - drive output discovery via intel_modeset_init()
1165  *   - initialize the memory manager
1166  *   - allocate initial config memory
1167  *   - setup the DRM framebuffer with the allocated memory
1168  */
1169 int i915_driver_load(struct pci_dev *pdev, const struct pci_device_id *ent)
1170 {
1171         struct drm_i915_private *dev_priv;
1172         int ret;
1173
1174         if (i915.nuclear_pageflip)
1175                 driver.driver_features |= DRIVER_ATOMIC;
1176
1177         ret = -ENOMEM;
1178         dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL);
1179         if (dev_priv)
1180                 ret = drm_dev_init(&dev_priv->drm, &driver, &pdev->dev);
1181         if (ret) {
1182                 dev_printk(KERN_ERR, &pdev->dev,
1183                            "[" DRM_NAME ":%s] allocation failed\n", __func__);
1184                 kfree(dev_priv);
1185                 return ret;
1186         }
1187
1188         dev_priv->drm.pdev = pdev;
1189         dev_priv->drm.dev_private = dev_priv;
1190
1191         ret = pci_enable_device(pdev);
1192         if (ret)
1193                 goto out_free_priv;
1194
1195         pci_set_drvdata(pdev, &dev_priv->drm);
1196
1197         ret = i915_driver_init_early(dev_priv, ent);
1198         if (ret < 0)
1199                 goto out_pci_disable;
1200
1201         intel_runtime_pm_get(dev_priv);
1202
1203         ret = i915_driver_init_mmio(dev_priv);
1204         if (ret < 0)
1205                 goto out_runtime_pm_put;
1206
1207         ret = i915_driver_init_hw(dev_priv);
1208         if (ret < 0)
1209                 goto out_cleanup_mmio;
1210
1211         /*
1212          * TODO: move the vblank init and parts of modeset init steps into one
1213          * of the i915_driver_init_/i915_driver_register functions according
1214          * to the role/effect of the given init step.
1215          */
1216         if (INTEL_INFO(dev_priv)->num_pipes) {
1217                 ret = drm_vblank_init(&dev_priv->drm,
1218                                       INTEL_INFO(dev_priv)->num_pipes);
1219                 if (ret)
1220                         goto out_cleanup_hw;
1221         }
1222
1223         ret = i915_load_modeset_init(&dev_priv->drm);
1224         if (ret < 0)
1225                 goto out_cleanup_vblank;
1226
1227         i915_driver_register(dev_priv);
1228
1229         intel_runtime_pm_enable(dev_priv);
1230
1231         /* Everything is in place, we can now relax! */
1232         DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
1233                  driver.name, driver.major, driver.minor, driver.patchlevel,
1234                  driver.date, pci_name(pdev), dev_priv->drm.primary->index);
1235
1236         intel_runtime_pm_put(dev_priv);
1237
1238         return 0;
1239
1240 out_cleanup_vblank:
1241         drm_vblank_cleanup(&dev_priv->drm);
1242 out_cleanup_hw:
1243         i915_driver_cleanup_hw(dev_priv);
1244 out_cleanup_mmio:
1245         i915_driver_cleanup_mmio(dev_priv);
1246 out_runtime_pm_put:
1247         intel_runtime_pm_put(dev_priv);
1248         i915_driver_cleanup_early(dev_priv);
1249 out_pci_disable:
1250         pci_disable_device(pdev);
1251 out_free_priv:
1252         i915_load_error(dev_priv, "Device initialization failed (%d)\n", ret);
1253         drm_dev_unref(&dev_priv->drm);
1254         return ret;
1255 }
1256
1257 void i915_driver_unload(struct drm_device *dev)
1258 {
1259         struct drm_i915_private *dev_priv = to_i915(dev);
1260         struct pci_dev *pdev = dev_priv->drm.pdev;
1261
1262         intel_fbdev_fini(dev);
1263
1264         if (i915_gem_suspend(dev))
1265                 DRM_ERROR("failed to idle hardware; continuing to unload!\n");
1266
1267         intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
1268
1269         i915_driver_unregister(dev_priv);
1270
1271         drm_vblank_cleanup(dev);
1272
1273         intel_modeset_cleanup(dev);
1274
1275         /*
1276          * free the memory space allocated for the child device
1277          * config parsed from VBT
1278          */
1279         if (dev_priv->vbt.child_dev && dev_priv->vbt.child_dev_num) {
1280                 kfree(dev_priv->vbt.child_dev);
1281                 dev_priv->vbt.child_dev = NULL;
1282                 dev_priv->vbt.child_dev_num = 0;
1283         }
1284         kfree(dev_priv->vbt.sdvo_lvds_vbt_mode);
1285         dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1286         kfree(dev_priv->vbt.lfp_lvds_vbt_mode);
1287         dev_priv->vbt.lfp_lvds_vbt_mode = NULL;
1288
1289         vga_switcheroo_unregister_client(pdev);
1290         vga_client_register(pdev, NULL, NULL, NULL);
1291
1292         intel_csr_ucode_fini(dev_priv);
1293
1294         /* Free error state after interrupts are fully disabled. */
1295         cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
1296         i915_destroy_error_state(dev);
1297
1298         /* Flush any outstanding unpin_work. */
1299         drain_workqueue(dev_priv->wq);
1300
1301         intel_guc_fini(dev);
1302         i915_gem_fini(dev);
1303         intel_fbc_cleanup_cfb(dev_priv);
1304
1305         intel_power_domains_fini(dev_priv);
1306
1307         i915_driver_cleanup_hw(dev_priv);
1308         i915_driver_cleanup_mmio(dev_priv);
1309
1310         intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
1311
1312         i915_driver_cleanup_early(dev_priv);
1313 }
1314
1315 static int i915_driver_open(struct drm_device *dev, struct drm_file *file)
1316 {
1317         int ret;
1318
1319         ret = i915_gem_open(dev, file);
1320         if (ret)
1321                 return ret;
1322
1323         return 0;
1324 }
1325
1326 /**
1327  * i915_driver_lastclose - clean up after all DRM clients have exited
1328  * @dev: DRM device
1329  *
1330  * Take care of cleaning up after all DRM clients have exited.  In the
1331  * mode setting case, we want to restore the kernel's initial mode (just
1332  * in case the last client left us in a bad state).
1333  *
1334  * Additionally, in the non-mode setting case, we'll tear down the GTT
1335  * and DMA structures, since the kernel won't be using them, and clea
1336  * up any GEM state.
1337  */
1338 static void i915_driver_lastclose(struct drm_device *dev)
1339 {
1340         intel_fbdev_restore_mode(dev);
1341         vga_switcheroo_process_delayed_switch();
1342 }
1343
1344 static void i915_driver_preclose(struct drm_device *dev, struct drm_file *file)
1345 {
1346         mutex_lock(&dev->struct_mutex);
1347         i915_gem_context_close(dev, file);
1348         i915_gem_release(dev, file);
1349         mutex_unlock(&dev->struct_mutex);
1350 }
1351
1352 static void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
1353 {
1354         struct drm_i915_file_private *file_priv = file->driver_priv;
1355
1356         kfree(file_priv);
1357 }
1358
1359 static void intel_suspend_encoders(struct drm_i915_private *dev_priv)
1360 {
1361         struct drm_device *dev = &dev_priv->drm;
1362         struct intel_encoder *encoder;
1363
1364         drm_modeset_lock_all(dev);
1365         for_each_intel_encoder(dev, encoder)
1366                 if (encoder->suspend)
1367                         encoder->suspend(encoder);
1368         drm_modeset_unlock_all(dev);
1369 }
1370
1371 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
1372                               bool rpm_resume);
1373 static int vlv_suspend_complete(struct drm_i915_private *dev_priv);
1374
1375 static bool suspend_to_idle(struct drm_i915_private *dev_priv)
1376 {
1377 #if IS_ENABLED(CONFIG_ACPI_SLEEP)
1378         if (acpi_target_system_state() < ACPI_STATE_S3)
1379                 return true;
1380 #endif
1381         return false;
1382 }
1383
1384 static int i915_drm_suspend(struct drm_device *dev)
1385 {
1386         struct drm_i915_private *dev_priv = to_i915(dev);
1387         struct pci_dev *pdev = dev_priv->drm.pdev;
1388         pci_power_t opregion_target_state;
1389         int error;
1390
1391         /* ignore lid events during suspend */
1392         mutex_lock(&dev_priv->modeset_restore_lock);
1393         dev_priv->modeset_restore = MODESET_SUSPENDED;
1394         mutex_unlock(&dev_priv->modeset_restore_lock);
1395
1396         disable_rpm_wakeref_asserts(dev_priv);
1397
1398         /* We do a lot of poking in a lot of registers, make sure they work
1399          * properly. */
1400         intel_display_set_init_power(dev_priv, true);
1401
1402         drm_kms_helper_poll_disable(dev);
1403
1404         pci_save_state(pdev);
1405
1406         error = i915_gem_suspend(dev);
1407         if (error) {
1408                 dev_err(&pdev->dev,
1409                         "GEM idle failed, resume might fail\n");
1410                 goto out;
1411         }
1412
1413         intel_guc_suspend(dev);
1414
1415         intel_display_suspend(dev);
1416
1417         intel_dp_mst_suspend(dev);
1418
1419         intel_runtime_pm_disable_interrupts(dev_priv);
1420         intel_hpd_cancel_work(dev_priv);
1421
1422         intel_suspend_encoders(dev_priv);
1423
1424         intel_suspend_hw(dev);
1425
1426         i915_gem_suspend_gtt_mappings(dev);
1427
1428         i915_save_state(dev);
1429
1430         opregion_target_state = suspend_to_idle(dev_priv) ? PCI_D1 : PCI_D3cold;
1431         intel_opregion_notify_adapter(dev_priv, opregion_target_state);
1432
1433         intel_uncore_forcewake_reset(dev_priv, false);
1434         intel_opregion_unregister(dev_priv);
1435
1436         intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED, true);
1437
1438         dev_priv->suspend_count++;
1439
1440         intel_csr_ucode_suspend(dev_priv);
1441
1442 out:
1443         enable_rpm_wakeref_asserts(dev_priv);
1444
1445         return error;
1446 }
1447
1448 static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
1449 {
1450         struct drm_i915_private *dev_priv = to_i915(dev);
1451         struct pci_dev *pdev = dev_priv->drm.pdev;
1452         bool fw_csr;
1453         int ret;
1454
1455         disable_rpm_wakeref_asserts(dev_priv);
1456
1457         intel_display_set_init_power(dev_priv, false);
1458
1459         fw_csr = !IS_BROXTON(dev_priv) &&
1460                 suspend_to_idle(dev_priv) && dev_priv->csr.dmc_payload;
1461         /*
1462          * In case of firmware assisted context save/restore don't manually
1463          * deinit the power domains. This also means the CSR/DMC firmware will
1464          * stay active, it will power down any HW resources as required and
1465          * also enable deeper system power states that would be blocked if the
1466          * firmware was inactive.
1467          */
1468         if (!fw_csr)
1469                 intel_power_domains_suspend(dev_priv);
1470
1471         ret = 0;
1472         if (IS_BROXTON(dev_priv))
1473                 bxt_enable_dc9(dev_priv);
1474         else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
1475                 hsw_enable_pc8(dev_priv);
1476         else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1477                 ret = vlv_suspend_complete(dev_priv);
1478
1479         if (ret) {
1480                 DRM_ERROR("Suspend complete failed: %d\n", ret);
1481                 if (!fw_csr)
1482                         intel_power_domains_init_hw(dev_priv, true);
1483
1484                 goto out;
1485         }
1486
1487         pci_disable_device(pdev);
1488         /*
1489          * During hibernation on some platforms the BIOS may try to access
1490          * the device even though it's already in D3 and hang the machine. So
1491          * leave the device in D0 on those platforms and hope the BIOS will
1492          * power down the device properly. The issue was seen on multiple old
1493          * GENs with different BIOS vendors, so having an explicit blacklist
1494          * is inpractical; apply the workaround on everything pre GEN6. The
1495          * platforms where the issue was seen:
1496          * Lenovo Thinkpad X301, X61s, X60, T60, X41
1497          * Fujitsu FSC S7110
1498          * Acer Aspire 1830T
1499          */
1500         if (!(hibernation && INTEL_INFO(dev_priv)->gen < 6))
1501                 pci_set_power_state(pdev, PCI_D3hot);
1502
1503         dev_priv->suspended_to_idle = suspend_to_idle(dev_priv);
1504
1505 out:
1506         enable_rpm_wakeref_asserts(dev_priv);
1507
1508         return ret;
1509 }
1510
1511 int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state)
1512 {
1513         int error;
1514
1515         if (!dev) {
1516                 DRM_ERROR("dev: %p\n", dev);
1517                 DRM_ERROR("DRM not initialized, aborting suspend.\n");
1518                 return -ENODEV;
1519         }
1520
1521         if (WARN_ON_ONCE(state.event != PM_EVENT_SUSPEND &&
1522                          state.event != PM_EVENT_FREEZE))
1523                 return -EINVAL;
1524
1525         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1526                 return 0;
1527
1528         error = i915_drm_suspend(dev);
1529         if (error)
1530                 return error;
1531
1532         return i915_drm_suspend_late(dev, false);
1533 }
1534
1535 static int i915_drm_resume(struct drm_device *dev)
1536 {
1537         struct drm_i915_private *dev_priv = to_i915(dev);
1538         int ret;
1539
1540         disable_rpm_wakeref_asserts(dev_priv);
1541         intel_sanitize_gt_powersave(dev_priv);
1542
1543         ret = i915_ggtt_enable_hw(dev_priv);
1544         if (ret)
1545                 DRM_ERROR("failed to re-enable GGTT\n");
1546
1547         intel_csr_ucode_resume(dev_priv);
1548
1549         i915_gem_resume(dev);
1550
1551         i915_restore_state(dev);
1552         intel_pps_unlock_regs_wa(dev_priv);
1553         intel_opregion_setup(dev_priv);
1554
1555         intel_init_pch_refclk(dev);
1556         drm_mode_config_reset(dev);
1557
1558         /*
1559          * Interrupts have to be enabled before any batches are run. If not the
1560          * GPU will hang. i915_gem_init_hw() will initiate batches to
1561          * update/restore the context.
1562          *
1563          * Modeset enabling in intel_modeset_init_hw() also needs working
1564          * interrupts.
1565          */
1566         intel_runtime_pm_enable_interrupts(dev_priv);
1567
1568         mutex_lock(&dev->struct_mutex);
1569         if (i915_gem_init_hw(dev)) {
1570                 DRM_ERROR("failed to re-initialize GPU, declaring wedged!\n");
1571                 i915_gem_set_wedged(dev_priv);
1572         }
1573         mutex_unlock(&dev->struct_mutex);
1574
1575         intel_guc_resume(dev);
1576
1577         intel_modeset_init_hw(dev);
1578
1579         spin_lock_irq(&dev_priv->irq_lock);
1580         if (dev_priv->display.hpd_irq_setup)
1581                 dev_priv->display.hpd_irq_setup(dev_priv);
1582         spin_unlock_irq(&dev_priv->irq_lock);
1583
1584         intel_dp_mst_resume(dev);
1585
1586         intel_display_resume(dev);
1587
1588         /*
1589          * ... but also need to make sure that hotplug processing
1590          * doesn't cause havoc. Like in the driver load code we don't
1591          * bother with the tiny race here where we might loose hotplug
1592          * notifications.
1593          * */
1594         intel_hpd_init(dev_priv);
1595         /* Config may have changed between suspend and resume */
1596         drm_helper_hpd_irq_event(dev);
1597
1598         intel_opregion_register(dev_priv);
1599
1600         intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING, false);
1601
1602         mutex_lock(&dev_priv->modeset_restore_lock);
1603         dev_priv->modeset_restore = MODESET_DONE;
1604         mutex_unlock(&dev_priv->modeset_restore_lock);
1605
1606         intel_opregion_notify_adapter(dev_priv, PCI_D0);
1607
1608         intel_autoenable_gt_powersave(dev_priv);
1609         drm_kms_helper_poll_enable(dev);
1610
1611         enable_rpm_wakeref_asserts(dev_priv);
1612
1613         return 0;
1614 }
1615
1616 static int i915_drm_resume_early(struct drm_device *dev)
1617 {
1618         struct drm_i915_private *dev_priv = to_i915(dev);
1619         struct pci_dev *pdev = dev_priv->drm.pdev;
1620         int ret;
1621
1622         /*
1623          * We have a resume ordering issue with the snd-hda driver also
1624          * requiring our device to be power up. Due to the lack of a
1625          * parent/child relationship we currently solve this with an early
1626          * resume hook.
1627          *
1628          * FIXME: This should be solved with a special hdmi sink device or
1629          * similar so that power domains can be employed.
1630          */
1631
1632         /*
1633          * Note that we need to set the power state explicitly, since we
1634          * powered off the device during freeze and the PCI core won't power
1635          * it back up for us during thaw. Powering off the device during
1636          * freeze is not a hard requirement though, and during the
1637          * suspend/resume phases the PCI core makes sure we get here with the
1638          * device powered on. So in case we change our freeze logic and keep
1639          * the device powered we can also remove the following set power state
1640          * call.
1641          */
1642         ret = pci_set_power_state(pdev, PCI_D0);
1643         if (ret) {
1644                 DRM_ERROR("failed to set PCI D0 power state (%d)\n", ret);
1645                 goto out;
1646         }
1647
1648         /*
1649          * Note that pci_enable_device() first enables any parent bridge
1650          * device and only then sets the power state for this device. The
1651          * bridge enabling is a nop though, since bridge devices are resumed
1652          * first. The order of enabling power and enabling the device is
1653          * imposed by the PCI core as described above, so here we preserve the
1654          * same order for the freeze/thaw phases.
1655          *
1656          * TODO: eventually we should remove pci_disable_device() /
1657          * pci_enable_enable_device() from suspend/resume. Due to how they
1658          * depend on the device enable refcount we can't anyway depend on them
1659          * disabling/enabling the device.
1660          */
1661         if (pci_enable_device(pdev)) {
1662                 ret = -EIO;
1663                 goto out;
1664         }
1665
1666         pci_set_master(pdev);
1667
1668         disable_rpm_wakeref_asserts(dev_priv);
1669
1670         if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1671                 ret = vlv_resume_prepare(dev_priv, false);
1672         if (ret)
1673                 DRM_ERROR("Resume prepare failed: %d, continuing anyway\n",
1674                           ret);
1675
1676         intel_uncore_early_sanitize(dev_priv, true);
1677
1678         if (IS_BROXTON(dev_priv)) {
1679                 if (!dev_priv->suspended_to_idle)
1680                         gen9_sanitize_dc_state(dev_priv);
1681                 bxt_disable_dc9(dev_priv);
1682         } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
1683                 hsw_disable_pc8(dev_priv);
1684         }
1685
1686         intel_uncore_sanitize(dev_priv);
1687
1688         if (IS_BROXTON(dev_priv) ||
1689             !(dev_priv->suspended_to_idle && dev_priv->csr.dmc_payload))
1690                 intel_power_domains_init_hw(dev_priv, true);
1691
1692         enable_rpm_wakeref_asserts(dev_priv);
1693
1694 out:
1695         dev_priv->suspended_to_idle = false;
1696
1697         return ret;
1698 }
1699
1700 int i915_resume_switcheroo(struct drm_device *dev)
1701 {
1702         int ret;
1703
1704         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1705                 return 0;
1706
1707         ret = i915_drm_resume_early(dev);
1708         if (ret)
1709                 return ret;
1710
1711         return i915_drm_resume(dev);
1712 }
1713
1714 static void disable_engines_irq(struct drm_i915_private *dev_priv)
1715 {
1716         struct intel_engine_cs *engine;
1717         enum intel_engine_id id;
1718
1719         /* Ensure irq handler finishes, and not run again. */
1720         disable_irq(dev_priv->drm.irq);
1721         for_each_engine(engine, dev_priv, id)
1722                 tasklet_kill(&engine->irq_tasklet);
1723 }
1724
1725 static void enable_engines_irq(struct drm_i915_private *dev_priv)
1726 {
1727         enable_irq(dev_priv->drm.irq);
1728 }
1729
1730 /**
1731  * i915_reset - reset chip after a hang
1732  * @dev: drm device to reset
1733  *
1734  * Reset the chip.  Useful if a hang is detected. Marks the device as wedged
1735  * on failure.
1736  *
1737  * Caller must hold the struct_mutex.
1738  *
1739  * Procedure is fairly simple:
1740  *   - reset the chip using the reset reg
1741  *   - re-init context state
1742  *   - re-init hardware status page
1743  *   - re-init ring buffer
1744  *   - re-init interrupt state
1745  *   - re-init display
1746  */
1747 void i915_reset(struct drm_i915_private *dev_priv)
1748 {
1749         struct drm_device *dev = &dev_priv->drm;
1750         struct i915_gpu_error *error = &dev_priv->gpu_error;
1751         int ret;
1752
1753         lockdep_assert_held(&dev->struct_mutex);
1754
1755         if (!test_and_clear_bit(I915_RESET_IN_PROGRESS, &error->flags))
1756                 return;
1757
1758         /* Clear any previous failed attempts at recovery. Time to try again. */
1759         __clear_bit(I915_WEDGED, &error->flags);
1760         error->reset_count++;
1761
1762         pr_notice("drm/i915: Resetting chip after gpu hang\n");
1763
1764         disable_engines_irq(dev_priv);
1765         ret = intel_gpu_reset(dev_priv, ALL_ENGINES);
1766         enable_engines_irq(dev_priv);
1767
1768         if (ret) {
1769                 if (ret != -ENODEV)
1770                         DRM_ERROR("Failed to reset chip: %i\n", ret);
1771                 else
1772                         DRM_DEBUG_DRIVER("GPU reset disabled\n");
1773                 goto error;
1774         }
1775
1776         i915_gem_reset(dev_priv);
1777         intel_overlay_reset(dev_priv);
1778
1779         /* Ok, now get things going again... */
1780
1781         /*
1782          * Everything depends on having the GTT running, so we need to start
1783          * there.  Fortunately we don't need to do this unless we reset the
1784          * chip at a PCI level.
1785          *
1786          * Next we need to restore the context, but we don't use those
1787          * yet either...
1788          *
1789          * Ring buffer needs to be re-initialized in the KMS case, or if X
1790          * was running at the time of the reset (i.e. we weren't VT
1791          * switched away).
1792          */
1793         ret = i915_gem_init_hw(dev);
1794         if (ret) {
1795                 DRM_ERROR("Failed hw init on reset %d\n", ret);
1796                 goto error;
1797         }
1798
1799 wakeup:
1800         wake_up_bit(&error->flags, I915_RESET_IN_PROGRESS);
1801         return;
1802
1803 error:
1804         i915_gem_set_wedged(dev_priv);
1805         goto wakeup;
1806 }
1807
1808 static int i915_pm_suspend(struct device *kdev)
1809 {
1810         struct pci_dev *pdev = to_pci_dev(kdev);
1811         struct drm_device *dev = pci_get_drvdata(pdev);
1812
1813         if (!dev) {
1814                 dev_err(kdev, "DRM not initialized, aborting suspend.\n");
1815                 return -ENODEV;
1816         }
1817
1818         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1819                 return 0;
1820
1821         return i915_drm_suspend(dev);
1822 }
1823
1824 static int i915_pm_suspend_late(struct device *kdev)
1825 {
1826         struct drm_device *dev = &kdev_to_i915(kdev)->drm;
1827
1828         /*
1829          * We have a suspend ordering issue with the snd-hda driver also
1830          * requiring our device to be power up. Due to the lack of a
1831          * parent/child relationship we currently solve this with an late
1832          * suspend hook.
1833          *
1834          * FIXME: This should be solved with a special hdmi sink device or
1835          * similar so that power domains can be employed.
1836          */
1837         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1838                 return 0;
1839
1840         return i915_drm_suspend_late(dev, false);
1841 }
1842
1843 static int i915_pm_poweroff_late(struct device *kdev)
1844 {
1845         struct drm_device *dev = &kdev_to_i915(kdev)->drm;
1846
1847         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1848                 return 0;
1849
1850         return i915_drm_suspend_late(dev, true);
1851 }
1852
1853 static int i915_pm_resume_early(struct device *kdev)
1854 {
1855         struct drm_device *dev = &kdev_to_i915(kdev)->drm;
1856
1857         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1858                 return 0;
1859
1860         return i915_drm_resume_early(dev);
1861 }
1862
1863 static int i915_pm_resume(struct device *kdev)
1864 {
1865         struct drm_device *dev = &kdev_to_i915(kdev)->drm;
1866
1867         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1868                 return 0;
1869
1870         return i915_drm_resume(dev);
1871 }
1872
1873 /* freeze: before creating the hibernation_image */
1874 static int i915_pm_freeze(struct device *kdev)
1875 {
1876         int ret;
1877
1878         ret = i915_pm_suspend(kdev);
1879         if (ret)
1880                 return ret;
1881
1882         ret = i915_gem_freeze(kdev_to_i915(kdev));
1883         if (ret)
1884                 return ret;
1885
1886         return 0;
1887 }
1888
1889 static int i915_pm_freeze_late(struct device *kdev)
1890 {
1891         int ret;
1892
1893         ret = i915_pm_suspend_late(kdev);
1894         if (ret)
1895                 return ret;
1896
1897         ret = i915_gem_freeze_late(kdev_to_i915(kdev));
1898         if (ret)
1899                 return ret;
1900
1901         return 0;
1902 }
1903
1904 /* thaw: called after creating the hibernation image, but before turning off. */
1905 static int i915_pm_thaw_early(struct device *kdev)
1906 {
1907         return i915_pm_resume_early(kdev);
1908 }
1909
1910 static int i915_pm_thaw(struct device *kdev)
1911 {
1912         return i915_pm_resume(kdev);
1913 }
1914
1915 /* restore: called after loading the hibernation image. */
1916 static int i915_pm_restore_early(struct device *kdev)
1917 {
1918         return i915_pm_resume_early(kdev);
1919 }
1920
1921 static int i915_pm_restore(struct device *kdev)
1922 {
1923         return i915_pm_resume(kdev);
1924 }
1925
1926 /*
1927  * Save all Gunit registers that may be lost after a D3 and a subsequent
1928  * S0i[R123] transition. The list of registers needing a save/restore is
1929  * defined in the VLV2_S0IXRegs document. This documents marks all Gunit
1930  * registers in the following way:
1931  * - Driver: saved/restored by the driver
1932  * - Punit : saved/restored by the Punit firmware
1933  * - No, w/o marking: no need to save/restore, since the register is R/O or
1934  *                    used internally by the HW in a way that doesn't depend
1935  *                    keeping the content across a suspend/resume.
1936  * - Debug : used for debugging
1937  *
1938  * We save/restore all registers marked with 'Driver', with the following
1939  * exceptions:
1940  * - Registers out of use, including also registers marked with 'Debug'.
1941  *   These have no effect on the driver's operation, so we don't save/restore
1942  *   them to reduce the overhead.
1943  * - Registers that are fully setup by an initialization function called from
1944  *   the resume path. For example many clock gating and RPS/RC6 registers.
1945  * - Registers that provide the right functionality with their reset defaults.
1946  *
1947  * TODO: Except for registers that based on the above 3 criteria can be safely
1948  * ignored, we save/restore all others, practically treating the HW context as
1949  * a black-box for the driver. Further investigation is needed to reduce the
1950  * saved/restored registers even further, by following the same 3 criteria.
1951  */
1952 static void vlv_save_gunit_s0ix_state(struct drm_i915_private *dev_priv)
1953 {
1954         struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
1955         int i;
1956
1957         /* GAM 0x4000-0x4770 */
1958         s->wr_watermark         = I915_READ(GEN7_WR_WATERMARK);
1959         s->gfx_prio_ctrl        = I915_READ(GEN7_GFX_PRIO_CTRL);
1960         s->arb_mode             = I915_READ(ARB_MODE);
1961         s->gfx_pend_tlb0        = I915_READ(GEN7_GFX_PEND_TLB0);
1962         s->gfx_pend_tlb1        = I915_READ(GEN7_GFX_PEND_TLB1);
1963
1964         for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
1965                 s->lra_limits[i] = I915_READ(GEN7_LRA_LIMITS(i));
1966
1967         s->media_max_req_count  = I915_READ(GEN7_MEDIA_MAX_REQ_COUNT);
1968         s->gfx_max_req_count    = I915_READ(GEN7_GFX_MAX_REQ_COUNT);
1969
1970         s->render_hwsp          = I915_READ(RENDER_HWS_PGA_GEN7);
1971         s->ecochk               = I915_READ(GAM_ECOCHK);
1972         s->bsd_hwsp             = I915_READ(BSD_HWS_PGA_GEN7);
1973         s->blt_hwsp             = I915_READ(BLT_HWS_PGA_GEN7);
1974
1975         s->tlb_rd_addr          = I915_READ(GEN7_TLB_RD_ADDR);
1976
1977         /* MBC 0x9024-0x91D0, 0x8500 */
1978         s->g3dctl               = I915_READ(VLV_G3DCTL);
1979         s->gsckgctl             = I915_READ(VLV_GSCKGCTL);
1980         s->mbctl                = I915_READ(GEN6_MBCTL);
1981
1982         /* GCP 0x9400-0x9424, 0x8100-0x810C */
1983         s->ucgctl1              = I915_READ(GEN6_UCGCTL1);
1984         s->ucgctl3              = I915_READ(GEN6_UCGCTL3);
1985         s->rcgctl1              = I915_READ(GEN6_RCGCTL1);
1986         s->rcgctl2              = I915_READ(GEN6_RCGCTL2);
1987         s->rstctl               = I915_READ(GEN6_RSTCTL);
1988         s->misccpctl            = I915_READ(GEN7_MISCCPCTL);
1989
1990         /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
1991         s->gfxpause             = I915_READ(GEN6_GFXPAUSE);
1992         s->rpdeuhwtc            = I915_READ(GEN6_RPDEUHWTC);
1993         s->rpdeuc               = I915_READ(GEN6_RPDEUC);
1994         s->ecobus               = I915_READ(ECOBUS);
1995         s->pwrdwnupctl          = I915_READ(VLV_PWRDWNUPCTL);
1996         s->rp_down_timeout      = I915_READ(GEN6_RP_DOWN_TIMEOUT);
1997         s->rp_deucsw            = I915_READ(GEN6_RPDEUCSW);
1998         s->rcubmabdtmr          = I915_READ(GEN6_RCUBMABDTMR);
1999         s->rcedata              = I915_READ(VLV_RCEDATA);
2000         s->spare2gh             = I915_READ(VLV_SPAREG2H);
2001
2002         /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
2003         s->gt_imr               = I915_READ(GTIMR);
2004         s->gt_ier               = I915_READ(GTIER);
2005         s->pm_imr               = I915_READ(GEN6_PMIMR);
2006         s->pm_ier               = I915_READ(GEN6_PMIER);
2007
2008         for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
2009                 s->gt_scratch[i] = I915_READ(GEN7_GT_SCRATCH(i));
2010
2011         /* GT SA CZ domain, 0x100000-0x138124 */
2012         s->tilectl              = I915_READ(TILECTL);
2013         s->gt_fifoctl           = I915_READ(GTFIFOCTL);
2014         s->gtlc_wake_ctrl       = I915_READ(VLV_GTLC_WAKE_CTRL);
2015         s->gtlc_survive         = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
2016         s->pmwgicz              = I915_READ(VLV_PMWGICZ);
2017
2018         /* Gunit-Display CZ domain, 0x182028-0x1821CF */
2019         s->gu_ctl0              = I915_READ(VLV_GU_CTL0);
2020         s->gu_ctl1              = I915_READ(VLV_GU_CTL1);
2021         s->pcbr                 = I915_READ(VLV_PCBR);
2022         s->clock_gate_dis2      = I915_READ(VLV_GUNIT_CLOCK_GATE2);
2023
2024         /*
2025          * Not saving any of:
2026          * DFT,         0x9800-0x9EC0
2027          * SARB,        0xB000-0xB1FC
2028          * GAC,         0x5208-0x524C, 0x14000-0x14C000
2029          * PCI CFG
2030          */
2031 }
2032
2033 static void vlv_restore_gunit_s0ix_state(struct drm_i915_private *dev_priv)
2034 {
2035         struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
2036         u32 val;
2037         int i;
2038
2039         /* GAM 0x4000-0x4770 */
2040         I915_WRITE(GEN7_WR_WATERMARK,   s->wr_watermark);
2041         I915_WRITE(GEN7_GFX_PRIO_CTRL,  s->gfx_prio_ctrl);
2042         I915_WRITE(ARB_MODE,            s->arb_mode | (0xffff << 16));
2043         I915_WRITE(GEN7_GFX_PEND_TLB0,  s->gfx_pend_tlb0);
2044         I915_WRITE(GEN7_GFX_PEND_TLB1,  s->gfx_pend_tlb1);
2045
2046         for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
2047                 I915_WRITE(GEN7_LRA_LIMITS(i), s->lra_limits[i]);
2048
2049         I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT, s->media_max_req_count);
2050         I915_WRITE(GEN7_GFX_MAX_REQ_COUNT, s->gfx_max_req_count);
2051
2052         I915_WRITE(RENDER_HWS_PGA_GEN7, s->render_hwsp);
2053         I915_WRITE(GAM_ECOCHK,          s->ecochk);
2054         I915_WRITE(BSD_HWS_PGA_GEN7,    s->bsd_hwsp);
2055         I915_WRITE(BLT_HWS_PGA_GEN7,    s->blt_hwsp);
2056
2057         I915_WRITE(GEN7_TLB_RD_ADDR,    s->tlb_rd_addr);
2058
2059         /* MBC 0x9024-0x91D0, 0x8500 */
2060         I915_WRITE(VLV_G3DCTL,          s->g3dctl);
2061         I915_WRITE(VLV_GSCKGCTL,        s->gsckgctl);
2062         I915_WRITE(GEN6_MBCTL,          s->mbctl);
2063
2064         /* GCP 0x9400-0x9424, 0x8100-0x810C */
2065         I915_WRITE(GEN6_UCGCTL1,        s->ucgctl1);
2066         I915_WRITE(GEN6_UCGCTL3,        s->ucgctl3);
2067         I915_WRITE(GEN6_RCGCTL1,        s->rcgctl1);
2068         I915_WRITE(GEN6_RCGCTL2,        s->rcgctl2);
2069         I915_WRITE(GEN6_RSTCTL,         s->rstctl);
2070         I915_WRITE(GEN7_MISCCPCTL,      s->misccpctl);
2071
2072         /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
2073         I915_WRITE(GEN6_GFXPAUSE,       s->gfxpause);
2074         I915_WRITE(GEN6_RPDEUHWTC,      s->rpdeuhwtc);
2075         I915_WRITE(GEN6_RPDEUC,         s->rpdeuc);
2076         I915_WRITE(ECOBUS,              s->ecobus);
2077         I915_WRITE(VLV_PWRDWNUPCTL,     s->pwrdwnupctl);
2078         I915_WRITE(GEN6_RP_DOWN_TIMEOUT,s->rp_down_timeout);
2079         I915_WRITE(GEN6_RPDEUCSW,       s->rp_deucsw);
2080         I915_WRITE(GEN6_RCUBMABDTMR,    s->rcubmabdtmr);
2081         I915_WRITE(VLV_RCEDATA,         s->rcedata);
2082         I915_WRITE(VLV_SPAREG2H,        s->spare2gh);
2083
2084         /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
2085         I915_WRITE(GTIMR,               s->gt_imr);
2086         I915_WRITE(GTIER,               s->gt_ier);
2087         I915_WRITE(GEN6_PMIMR,          s->pm_imr);
2088         I915_WRITE(GEN6_PMIER,          s->pm_ier);
2089
2090         for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
2091                 I915_WRITE(GEN7_GT_SCRATCH(i), s->gt_scratch[i]);
2092
2093         /* GT SA CZ domain, 0x100000-0x138124 */
2094         I915_WRITE(TILECTL,                     s->tilectl);
2095         I915_WRITE(GTFIFOCTL,                   s->gt_fifoctl);
2096         /*
2097          * Preserve the GT allow wake and GFX force clock bit, they are not
2098          * be restored, as they are used to control the s0ix suspend/resume
2099          * sequence by the caller.
2100          */
2101         val = I915_READ(VLV_GTLC_WAKE_CTRL);
2102         val &= VLV_GTLC_ALLOWWAKEREQ;
2103         val |= s->gtlc_wake_ctrl & ~VLV_GTLC_ALLOWWAKEREQ;
2104         I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
2105
2106         val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
2107         val &= VLV_GFX_CLK_FORCE_ON_BIT;
2108         val |= s->gtlc_survive & ~VLV_GFX_CLK_FORCE_ON_BIT;
2109         I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
2110
2111         I915_WRITE(VLV_PMWGICZ,                 s->pmwgicz);
2112
2113         /* Gunit-Display CZ domain, 0x182028-0x1821CF */
2114         I915_WRITE(VLV_GU_CTL0,                 s->gu_ctl0);
2115         I915_WRITE(VLV_GU_CTL1,                 s->gu_ctl1);
2116         I915_WRITE(VLV_PCBR,                    s->pcbr);
2117         I915_WRITE(VLV_GUNIT_CLOCK_GATE2,       s->clock_gate_dis2);
2118 }
2119
2120 int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on)
2121 {
2122         u32 val;
2123         int err;
2124
2125         val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
2126         val &= ~VLV_GFX_CLK_FORCE_ON_BIT;
2127         if (force_on)
2128                 val |= VLV_GFX_CLK_FORCE_ON_BIT;
2129         I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
2130
2131         if (!force_on)
2132                 return 0;
2133
2134         err = intel_wait_for_register(dev_priv,
2135                                       VLV_GTLC_SURVIVABILITY_REG,
2136                                       VLV_GFX_CLK_STATUS_BIT,
2137                                       VLV_GFX_CLK_STATUS_BIT,
2138                                       20);
2139         if (err)
2140                 DRM_ERROR("timeout waiting for GFX clock force-on (%08x)\n",
2141                           I915_READ(VLV_GTLC_SURVIVABILITY_REG));
2142
2143         return err;
2144 }
2145
2146 static int vlv_allow_gt_wake(struct drm_i915_private *dev_priv, bool allow)
2147 {
2148         u32 val;
2149         int err = 0;
2150
2151         val = I915_READ(VLV_GTLC_WAKE_CTRL);
2152         val &= ~VLV_GTLC_ALLOWWAKEREQ;
2153         if (allow)
2154                 val |= VLV_GTLC_ALLOWWAKEREQ;
2155         I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
2156         POSTING_READ(VLV_GTLC_WAKE_CTRL);
2157
2158         err = intel_wait_for_register(dev_priv,
2159                                       VLV_GTLC_PW_STATUS,
2160                                       VLV_GTLC_ALLOWWAKEACK,
2161                                       allow,
2162                                       1);
2163         if (err)
2164                 DRM_ERROR("timeout disabling GT waking\n");
2165
2166         return err;
2167 }
2168
2169 static int vlv_wait_for_gt_wells(struct drm_i915_private *dev_priv,
2170                                  bool wait_for_on)
2171 {
2172         u32 mask;
2173         u32 val;
2174         int err;
2175
2176         mask = VLV_GTLC_PW_MEDIA_STATUS_MASK | VLV_GTLC_PW_RENDER_STATUS_MASK;
2177         val = wait_for_on ? mask : 0;
2178         if ((I915_READ(VLV_GTLC_PW_STATUS) & mask) == val)
2179                 return 0;
2180
2181         DRM_DEBUG_KMS("waiting for GT wells to go %s (%08x)\n",
2182                       onoff(wait_for_on),
2183                       I915_READ(VLV_GTLC_PW_STATUS));
2184
2185         /*
2186          * RC6 transitioning can be delayed up to 2 msec (see
2187          * valleyview_enable_rps), use 3 msec for safety.
2188          */
2189         err = intel_wait_for_register(dev_priv,
2190                                       VLV_GTLC_PW_STATUS, mask, val,
2191                                       3);
2192         if (err)
2193                 DRM_ERROR("timeout waiting for GT wells to go %s\n",
2194                           onoff(wait_for_on));
2195
2196         return err;
2197 }
2198
2199 static void vlv_check_no_gt_access(struct drm_i915_private *dev_priv)
2200 {
2201         if (!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEERR))
2202                 return;
2203
2204         DRM_DEBUG_DRIVER("GT register access while GT waking disabled\n");
2205         I915_WRITE(VLV_GTLC_PW_STATUS, VLV_GTLC_ALLOWWAKEERR);
2206 }
2207
2208 static int vlv_suspend_complete(struct drm_i915_private *dev_priv)
2209 {
2210         u32 mask;
2211         int err;
2212
2213         /*
2214          * Bspec defines the following GT well on flags as debug only, so
2215          * don't treat them as hard failures.
2216          */
2217         (void)vlv_wait_for_gt_wells(dev_priv, false);
2218
2219         mask = VLV_GTLC_RENDER_CTX_EXISTS | VLV_GTLC_MEDIA_CTX_EXISTS;
2220         WARN_ON((I915_READ(VLV_GTLC_WAKE_CTRL) & mask) != mask);
2221
2222         vlv_check_no_gt_access(dev_priv);
2223
2224         err = vlv_force_gfx_clock(dev_priv, true);
2225         if (err)
2226                 goto err1;
2227
2228         err = vlv_allow_gt_wake(dev_priv, false);
2229         if (err)
2230                 goto err2;
2231
2232         if (!IS_CHERRYVIEW(dev_priv))
2233                 vlv_save_gunit_s0ix_state(dev_priv);
2234
2235         err = vlv_force_gfx_clock(dev_priv, false);
2236         if (err)
2237                 goto err2;
2238
2239         return 0;
2240
2241 err2:
2242         /* For safety always re-enable waking and disable gfx clock forcing */
2243         vlv_allow_gt_wake(dev_priv, true);
2244 err1:
2245         vlv_force_gfx_clock(dev_priv, false);
2246
2247         return err;
2248 }
2249
2250 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
2251                                 bool rpm_resume)
2252 {
2253         struct drm_device *dev = &dev_priv->drm;
2254         int err;
2255         int ret;
2256
2257         /*
2258          * If any of the steps fail just try to continue, that's the best we
2259          * can do at this point. Return the first error code (which will also
2260          * leave RPM permanently disabled).
2261          */
2262         ret = vlv_force_gfx_clock(dev_priv, true);
2263
2264         if (!IS_CHERRYVIEW(dev_priv))
2265                 vlv_restore_gunit_s0ix_state(dev_priv);
2266
2267         err = vlv_allow_gt_wake(dev_priv, true);
2268         if (!ret)
2269                 ret = err;
2270
2271         err = vlv_force_gfx_clock(dev_priv, false);
2272         if (!ret)
2273                 ret = err;
2274
2275         vlv_check_no_gt_access(dev_priv);
2276
2277         if (rpm_resume) {
2278                 intel_init_clock_gating(dev);
2279                 i915_gem_restore_fences(dev);
2280         }
2281
2282         return ret;
2283 }
2284
2285 static int intel_runtime_suspend(struct device *kdev)
2286 {
2287         struct pci_dev *pdev = to_pci_dev(kdev);
2288         struct drm_device *dev = pci_get_drvdata(pdev);
2289         struct drm_i915_private *dev_priv = to_i915(dev);
2290         int ret;
2291
2292         if (WARN_ON_ONCE(!(dev_priv->rps.enabled && intel_enable_rc6())))
2293                 return -ENODEV;
2294
2295         if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev_priv)))
2296                 return -ENODEV;
2297
2298         DRM_DEBUG_KMS("Suspending device\n");
2299
2300         /*
2301          * We could deadlock here in case another thread holding struct_mutex
2302          * calls RPM suspend concurrently, since the RPM suspend will wait
2303          * first for this RPM suspend to finish. In this case the concurrent
2304          * RPM resume will be followed by its RPM suspend counterpart. Still
2305          * for consistency return -EAGAIN, which will reschedule this suspend.
2306          */
2307         if (!mutex_trylock(&dev->struct_mutex)) {
2308                 DRM_DEBUG_KMS("device lock contention, deffering suspend\n");
2309                 /*
2310                  * Bump the expiration timestamp, otherwise the suspend won't
2311                  * be rescheduled.
2312                  */
2313                 pm_runtime_mark_last_busy(kdev);
2314
2315                 return -EAGAIN;
2316         }
2317
2318         disable_rpm_wakeref_asserts(dev_priv);
2319
2320         /*
2321          * We are safe here against re-faults, since the fault handler takes
2322          * an RPM reference.
2323          */
2324         i915_gem_release_all_mmaps(dev_priv);
2325         mutex_unlock(&dev->struct_mutex);
2326
2327         intel_guc_suspend(dev);
2328
2329         intel_runtime_pm_disable_interrupts(dev_priv);
2330
2331         ret = 0;
2332         if (IS_BROXTON(dev_priv)) {
2333                 bxt_display_core_uninit(dev_priv);
2334                 bxt_enable_dc9(dev_priv);
2335         } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
2336                 hsw_enable_pc8(dev_priv);
2337         } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
2338                 ret = vlv_suspend_complete(dev_priv);
2339         }
2340
2341         if (ret) {
2342                 DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
2343                 intel_runtime_pm_enable_interrupts(dev_priv);
2344
2345                 enable_rpm_wakeref_asserts(dev_priv);
2346
2347                 return ret;
2348         }
2349
2350         intel_uncore_forcewake_reset(dev_priv, false);
2351
2352         enable_rpm_wakeref_asserts(dev_priv);
2353         WARN_ON_ONCE(atomic_read(&dev_priv->pm.wakeref_count));
2354
2355         if (intel_uncore_arm_unclaimed_mmio_detection(dev_priv))
2356                 DRM_ERROR("Unclaimed access detected prior to suspending\n");
2357
2358         dev_priv->pm.suspended = true;
2359
2360         /*
2361          * FIXME: We really should find a document that references the arguments
2362          * used below!
2363          */
2364         if (IS_BROADWELL(dev_priv)) {
2365                 /*
2366                  * On Broadwell, if we use PCI_D1 the PCH DDI ports will stop
2367                  * being detected, and the call we do at intel_runtime_resume()
2368                  * won't be able to restore them. Since PCI_D3hot matches the
2369                  * actual specification and appears to be working, use it.
2370                  */
2371                 intel_opregion_notify_adapter(dev_priv, PCI_D3hot);
2372         } else {
2373                 /*
2374                  * current versions of firmware which depend on this opregion
2375                  * notification have repurposed the D1 definition to mean
2376                  * "runtime suspended" vs. what you would normally expect (D3)
2377                  * to distinguish it from notifications that might be sent via
2378                  * the suspend path.
2379                  */
2380                 intel_opregion_notify_adapter(dev_priv, PCI_D1);
2381         }
2382
2383         assert_forcewakes_inactive(dev_priv);
2384
2385         if (!IS_VALLEYVIEW(dev_priv) || !IS_CHERRYVIEW(dev_priv))
2386                 intel_hpd_poll_init(dev_priv);
2387
2388         DRM_DEBUG_KMS("Device suspended\n");
2389         return 0;
2390 }
2391
2392 static int intel_runtime_resume(struct device *kdev)
2393 {
2394         struct pci_dev *pdev = to_pci_dev(kdev);
2395         struct drm_device *dev = pci_get_drvdata(pdev);
2396         struct drm_i915_private *dev_priv = to_i915(dev);
2397         int ret = 0;
2398
2399         if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev_priv)))
2400                 return -ENODEV;
2401
2402         DRM_DEBUG_KMS("Resuming device\n");
2403
2404         WARN_ON_ONCE(atomic_read(&dev_priv->pm.wakeref_count));
2405         disable_rpm_wakeref_asserts(dev_priv);
2406
2407         intel_opregion_notify_adapter(dev_priv, PCI_D0);
2408         dev_priv->pm.suspended = false;
2409         if (intel_uncore_unclaimed_mmio(dev_priv))
2410                 DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n");
2411
2412         intel_guc_resume(dev);
2413
2414         if (IS_GEN6(dev_priv))
2415                 intel_init_pch_refclk(dev);
2416
2417         if (IS_BROXTON(dev_priv)) {
2418                 bxt_disable_dc9(dev_priv);
2419                 bxt_display_core_init(dev_priv, true);
2420                 if (dev_priv->csr.dmc_payload &&
2421                     (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5))
2422                         gen9_enable_dc5(dev_priv);
2423         } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
2424                 hsw_disable_pc8(dev_priv);
2425         } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
2426                 ret = vlv_resume_prepare(dev_priv, true);
2427         }
2428
2429         /*
2430          * No point of rolling back things in case of an error, as the best
2431          * we can do is to hope that things will still work (and disable RPM).
2432          */
2433         i915_gem_init_swizzling(dev);
2434
2435         intel_runtime_pm_enable_interrupts(dev_priv);
2436
2437         /*
2438          * On VLV/CHV display interrupts are part of the display
2439          * power well, so hpd is reinitialized from there. For
2440          * everyone else do it here.
2441          */
2442         if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
2443                 intel_hpd_init(dev_priv);
2444
2445         enable_rpm_wakeref_asserts(dev_priv);
2446
2447         if (ret)
2448                 DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret);
2449         else
2450                 DRM_DEBUG_KMS("Device resumed\n");
2451
2452         return ret;
2453 }
2454
2455 const struct dev_pm_ops i915_pm_ops = {
2456         /*
2457          * S0ix (via system suspend) and S3 event handlers [PMSG_SUSPEND,
2458          * PMSG_RESUME]
2459          */
2460         .suspend = i915_pm_suspend,
2461         .suspend_late = i915_pm_suspend_late,
2462         .resume_early = i915_pm_resume_early,
2463         .resume = i915_pm_resume,
2464
2465         /*
2466          * S4 event handlers
2467          * @freeze, @freeze_late    : called (1) before creating the
2468          *                            hibernation image [PMSG_FREEZE] and
2469          *                            (2) after rebooting, before restoring
2470          *                            the image [PMSG_QUIESCE]
2471          * @thaw, @thaw_early       : called (1) after creating the hibernation
2472          *                            image, before writing it [PMSG_THAW]
2473          *                            and (2) after failing to create or
2474          *                            restore the image [PMSG_RECOVER]
2475          * @poweroff, @poweroff_late: called after writing the hibernation
2476          *                            image, before rebooting [PMSG_HIBERNATE]
2477          * @restore, @restore_early : called after rebooting and restoring the
2478          *                            hibernation image [PMSG_RESTORE]
2479          */
2480         .freeze = i915_pm_freeze,
2481         .freeze_late = i915_pm_freeze_late,
2482         .thaw_early = i915_pm_thaw_early,
2483         .thaw = i915_pm_thaw,
2484         .poweroff = i915_pm_suspend,
2485         .poweroff_late = i915_pm_poweroff_late,
2486         .restore_early = i915_pm_restore_early,
2487         .restore = i915_pm_restore,
2488
2489         /* S0ix (via runtime suspend) event handlers */
2490         .runtime_suspend = intel_runtime_suspend,
2491         .runtime_resume = intel_runtime_resume,
2492 };
2493
2494 static const struct vm_operations_struct i915_gem_vm_ops = {
2495         .fault = i915_gem_fault,
2496         .open = drm_gem_vm_open,
2497         .close = drm_gem_vm_close,
2498 };
2499
2500 static const struct file_operations i915_driver_fops = {
2501         .owner = THIS_MODULE,
2502         .open = drm_open,
2503         .release = drm_release,
2504         .unlocked_ioctl = drm_ioctl,
2505         .mmap = drm_gem_mmap,
2506         .poll = drm_poll,
2507         .read = drm_read,
2508 #ifdef CONFIG_COMPAT
2509         .compat_ioctl = i915_compat_ioctl,
2510 #endif
2511         .llseek = noop_llseek,
2512 };
2513
2514 static int
2515 i915_gem_reject_pin_ioctl(struct drm_device *dev, void *data,
2516                           struct drm_file *file)
2517 {
2518         return -ENODEV;
2519 }
2520
2521 static const struct drm_ioctl_desc i915_ioctls[] = {
2522         DRM_IOCTL_DEF_DRV(I915_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2523         DRM_IOCTL_DEF_DRV(I915_FLUSH, drm_noop, DRM_AUTH),
2524         DRM_IOCTL_DEF_DRV(I915_FLIP, drm_noop, DRM_AUTH),
2525         DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, drm_noop, DRM_AUTH),
2526         DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, drm_noop, DRM_AUTH),
2527         DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, drm_noop, DRM_AUTH),
2528         DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH|DRM_RENDER_ALLOW),
2529         DRM_IOCTL_DEF_DRV(I915_SETPARAM, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2530         DRM_IOCTL_DEF_DRV(I915_ALLOC, drm_noop, DRM_AUTH),
2531         DRM_IOCTL_DEF_DRV(I915_FREE, drm_noop, DRM_AUTH),
2532         DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2533         DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, drm_noop, DRM_AUTH),
2534         DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP,  drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2535         DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE,  drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2536         DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE,  drm_noop, DRM_AUTH),
2537         DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, drm_noop, DRM_AUTH),
2538         DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2539         DRM_IOCTL_DEF_DRV(I915_GEM_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2540         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH),
2541         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_RENDER_ALLOW),
2542         DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
2543         DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
2544         DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
2545         DRM_IOCTL_DEF_DRV(I915_GEM_SET_CACHING, i915_gem_set_caching_ioctl, DRM_RENDER_ALLOW),
2546         DRM_IOCTL_DEF_DRV(I915_GEM_GET_CACHING, i915_gem_get_caching_ioctl, DRM_RENDER_ALLOW),
2547         DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
2548         DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2549         DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2550         DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_RENDER_ALLOW),
2551         DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_RENDER_ALLOW),
2552         DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_RENDER_ALLOW),
2553         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_RENDER_ALLOW),
2554         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_RENDER_ALLOW),
2555         DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_RENDER_ALLOW),
2556         DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_RENDER_ALLOW),
2557         DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_RENDER_ALLOW),
2558         DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_RENDER_ALLOW),
2559         DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_RENDER_ALLOW),
2560         DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, 0),
2561         DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_RENDER_ALLOW),
2562         DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
2563         DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
2564         DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey, DRM_MASTER|DRM_CONTROL_ALLOW),
2565         DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW),
2566         DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
2567         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE, i915_gem_context_create_ioctl, DRM_RENDER_ALLOW),
2568         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_RENDER_ALLOW),
2569         DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_RENDER_ALLOW),
2570         DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_gem_context_reset_stats_ioctl, DRM_RENDER_ALLOW),
2571         DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_RENDER_ALLOW),
2572         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_GETPARAM, i915_gem_context_getparam_ioctl, DRM_RENDER_ALLOW),
2573         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_SETPARAM, i915_gem_context_setparam_ioctl, DRM_RENDER_ALLOW),
2574 };
2575
2576 static struct drm_driver driver = {
2577         /* Don't use MTRRs here; the Xserver or userspace app should
2578          * deal with them for Intel hardware.
2579          */
2580         .driver_features =
2581             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |
2582             DRIVER_RENDER | DRIVER_MODESET,
2583         .open = i915_driver_open,
2584         .lastclose = i915_driver_lastclose,
2585         .preclose = i915_driver_preclose,
2586         .postclose = i915_driver_postclose,
2587         .set_busid = drm_pci_set_busid,
2588
2589         .gem_close_object = i915_gem_close_object,
2590         .gem_free_object = i915_gem_free_object,
2591         .gem_vm_ops = &i915_gem_vm_ops,
2592
2593         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
2594         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
2595         .gem_prime_export = i915_gem_prime_export,
2596         .gem_prime_import = i915_gem_prime_import,
2597
2598         .dumb_create = i915_gem_dumb_create,
2599         .dumb_map_offset = i915_gem_mmap_gtt,
2600         .dumb_destroy = drm_gem_dumb_destroy,
2601         .ioctls = i915_ioctls,
2602         .num_ioctls = ARRAY_SIZE(i915_ioctls),
2603         .fops = &i915_driver_fops,
2604         .name = DRIVER_NAME,
2605         .desc = DRIVER_DESC,
2606         .date = DRIVER_DATE,
2607         .major = DRIVER_MAJOR,
2608         .minor = DRIVER_MINOR,
2609         .patchlevel = DRIVER_PATCHLEVEL,
2610 };