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/drm_atomic_helper.h>
  47 #include <drm/i915_drm.h>
  48
  49 #include "i915_drv.h"
  50 #include "i915_trace.h"
  51 #include "i915_pmu.h"
  52 #include "i915_query.h"
  53 #include "i915_vgpu.h"
  54 #include "intel_drv.h"
  55 #include "intel_uc.h"
  56
  57 static struct drm_driver driver;
  58
  59 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
  60 static unsigned int i915_load_fail_count;
  61
  62 bool __i915_inject_load_failure(const char *func, int line)
  63 {
  64         if (i915_load_fail_count >= i915_modparams.inject_load_failure)
  65                 return false;
  66
  67         if (++i915_load_fail_count == i915_modparams.inject_load_failure) {
  68                 DRM_INFO("Injecting failure at checkpoint %u [%s:%d]\n",
  69                          i915_modparams.inject_load_failure, func, line);
  70                 i915_modparams.inject_load_failure = 0;
  71                 return true;
  72         }
  73
  74         return false;
  75 }
  76
  77 bool i915_error_injected(void)
  78 {
  79         return i915_load_fail_count && !i915_modparams.inject_load_failure;
  80 }
  81
  82 #endif
  83
  84 #define FDO_BUG_URL "https://bugs.freedesktop.org/enter_bug.cgi?product=DRI"
  85 #define FDO_BUG_MSG "Please file a bug at " FDO_BUG_URL " against DRM/Intel " \
  86                     "providing the dmesg log by booting with drm.debug=0xf"
  87
  88 void
  89 __i915_printk(struct drm_i915_private *dev_priv, const char *level,
  90               const char *fmt, ...)
  91 {
  92         static bool shown_bug_once;
  93         struct device *kdev = dev_priv->drm.dev;
  94         bool is_error = level[1] <= KERN_ERR[1];
  95         bool is_debug = level[1] == KERN_DEBUG[1];
  96         struct va_format vaf;
  97         va_list args;
  98
  99         if (is_debug && !(drm_debug & DRM_UT_DRIVER))
 100                 return;
 101
 102         va_start(args, fmt);
 103
 104         vaf.fmt = fmt;
 105         vaf.va = &args;
 106
 107         if (is_error)
 108                 dev_printk(level, kdev, "%pV", &vaf);
 109         else
 110                 dev_printk(level, kdev, "[" DRM_NAME ":%ps] %pV",
 111                            __builtin_return_address(0), &vaf);
 112
 113         va_end(args);
 114
 115         if (is_error && !shown_bug_once) {
 116                 /*
 117                  * Ask the user to file a bug report for the error, except
 118                  * if they may have caused the bug by fiddling with unsafe
 119                  * module parameters.
 120                  */
 121                 if (!test_taint(TAINT_USER))
 122                         dev_notice(kdev, "%s", FDO_BUG_MSG);
 123                 shown_bug_once = true;
 124         }
 125 }
 126
 127 /* Map PCH device id to PCH type, or PCH_NONE if unknown. */
 128 static enum intel_pch
 129 intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
 130 {
 131         switch (id) {
 132         case INTEL_PCH_IBX_DEVICE_ID_TYPE:
 133                 DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
 134                 WARN_ON(!IS_GEN5(dev_priv));
 135                 return PCH_IBX;
 136         case INTEL_PCH_CPT_DEVICE_ID_TYPE:
 137                 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
 138                 WARN_ON(!IS_GEN6(dev_priv) && !IS_IVYBRIDGE(dev_priv));
 139                 return PCH_CPT;
 140         case INTEL_PCH_PPT_DEVICE_ID_TYPE:
 141                 DRM_DEBUG_KMS("Found PantherPoint PCH\n");
 142                 WARN_ON(!IS_GEN6(dev_priv) && !IS_IVYBRIDGE(dev_priv));
 143                 /* PantherPoint is CPT compatible */
 144                 return PCH_CPT;
 145         case INTEL_PCH_LPT_DEVICE_ID_TYPE:
 146                 DRM_DEBUG_KMS("Found LynxPoint PCH\n");
 147                 WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
 148                 WARN_ON(IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv));
 149                 return PCH_LPT;
 150         case INTEL_PCH_LPT_LP_DEVICE_ID_TYPE:
 151                 DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
 152                 WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
 153                 WARN_ON(!IS_HSW_ULT(dev_priv) && !IS_BDW_ULT(dev_priv));
 154                 return PCH_LPT;
 155         case INTEL_PCH_WPT_DEVICE_ID_TYPE:
 156                 DRM_DEBUG_KMS("Found WildcatPoint PCH\n");
 157                 WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
 158                 WARN_ON(IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv));
 159                 /* WildcatPoint is LPT compatible */
 160                 return PCH_LPT;
 161         case INTEL_PCH_WPT_LP_DEVICE_ID_TYPE:
 162                 DRM_DEBUG_KMS("Found WildcatPoint LP PCH\n");
 163                 WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
 164                 WARN_ON(!IS_HSW_ULT(dev_priv) && !IS_BDW_ULT(dev_priv));
 165                 /* WildcatPoint is LPT compatible */
 166                 return PCH_LPT;
 167         case INTEL_PCH_SPT_DEVICE_ID_TYPE:
 168                 DRM_DEBUG_KMS("Found SunrisePoint PCH\n");
 169                 WARN_ON(!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv));
 170                 return PCH_SPT;
 171         case INTEL_PCH_SPT_LP_DEVICE_ID_TYPE:
 172                 DRM_DEBUG_KMS("Found SunrisePoint LP PCH\n");
 173                 WARN_ON(!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv));
 174                 return PCH_SPT;
 175         case INTEL_PCH_KBP_DEVICE_ID_TYPE:
 176                 DRM_DEBUG_KMS("Found Kaby Lake PCH (KBP)\n");
 177                 WARN_ON(!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv) &&
 178                         !IS_COFFEELAKE(dev_priv));
 179                 return PCH_KBP;
 180         case INTEL_PCH_CNP_DEVICE_ID_TYPE:
 181                 DRM_DEBUG_KMS("Found Cannon Lake PCH (CNP)\n");
 182                 WARN_ON(!IS_CANNONLAKE(dev_priv) && !IS_COFFEELAKE(dev_priv));
 183                 return PCH_CNP;
 184         case INTEL_PCH_CNP_LP_DEVICE_ID_TYPE:
 185                 DRM_DEBUG_KMS("Found Cannon Lake LP PCH (CNP-LP)\n");
 186                 WARN_ON(!IS_CANNONLAKE(dev_priv) && !IS_COFFEELAKE(dev_priv));
 187                 return PCH_CNP;
 188         case INTEL_PCH_ICP_DEVICE_ID_TYPE:
 189                 DRM_DEBUG_KMS("Found Ice Lake PCH\n");
 190                 WARN_ON(!IS_ICELAKE(dev_priv));
 191                 return PCH_ICP;
 192         default:
 193                 return PCH_NONE;
 194         }
 195 }
 196
 197 static bool intel_is_virt_pch(unsigned short id,
 198                               unsigned short svendor, unsigned short sdevice)
 199 {
 200         return (id == INTEL_PCH_P2X_DEVICE_ID_TYPE ||
 201                 id == INTEL_PCH_P3X_DEVICE_ID_TYPE ||
 202                 (id == INTEL_PCH_QEMU_DEVICE_ID_TYPE &&
 203                  svendor == PCI_SUBVENDOR_ID_REDHAT_QUMRANET &&
 204                  sdevice == PCI_SUBDEVICE_ID_QEMU));
 205 }
 206
 207 static unsigned short
 208 intel_virt_detect_pch(const struct drm_i915_private *dev_priv)
 209 {
 210         unsigned short id = 0;
 211
 212         /*
 213          * In a virtualized passthrough environment we can be in a
 214          * setup where the ISA bridge is not able to be passed through.
 215          * In this case, a south bridge can be emulated and we have to
 216          * make an educated guess as to which PCH is really there.
 217          */
 218
 219         if (IS_GEN5(dev_priv))
 220                 id = INTEL_PCH_IBX_DEVICE_ID_TYPE;
 221         else if (IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv))
 222                 id = INTEL_PCH_CPT_DEVICE_ID_TYPE;
 223         else if (IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv))
 224                 id = INTEL_PCH_LPT_LP_DEVICE_ID_TYPE;
 225         else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
 226                 id = INTEL_PCH_LPT_DEVICE_ID_TYPE;
 227         else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
 228                 id = INTEL_PCH_SPT_DEVICE_ID_TYPE;
 229         else if (IS_COFFEELAKE(dev_priv) || IS_CANNONLAKE(dev_priv))
 230                 id = INTEL_PCH_CNP_DEVICE_ID_TYPE;
 231         else if (IS_ICELAKE(dev_priv))
 232                 id = INTEL_PCH_ICP_DEVICE_ID_TYPE;
 233
 234         if (id)
 235                 DRM_DEBUG_KMS("Assuming PCH ID %04x\n", id);
 236         else
 237                 DRM_DEBUG_KMS("Assuming no PCH\n");
 238
 239         return id;
 240 }
 241
 242 static void intel_detect_pch(struct drm_i915_private *dev_priv)
 243 {
 244         struct pci_dev *pch = NULL;
 245
 246         /*
 247          * The reason to probe ISA bridge instead of Dev31:Fun0 is to
 248          * make graphics device passthrough work easy for VMM, that only
 249          * need to expose ISA bridge to let driver know the real hardware
 250          * underneath. This is a requirement from virtualization team.
 251          *
 252          * In some virtualized environments (e.g. XEN), there is irrelevant
 253          * ISA bridge in the system. To work reliably, we should scan trhough
 254          * all the ISA bridge devices and check for the first match, instead
 255          * of only checking the first one.
 256          */
 257         while ((pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, pch))) {
 258                 unsigned short id;
 259                 enum intel_pch pch_type;
 260
 261                 if (pch->vendor != PCI_VENDOR_ID_INTEL)
 262                         continue;
 263
 264                 id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
 265
 266                 pch_type = intel_pch_type(dev_priv, id);
 267                 if (pch_type != PCH_NONE) {
 268                         dev_priv->pch_type = pch_type;
 269                         dev_priv->pch_id = id;
 270                         break;
 271                 } else if (intel_is_virt_pch(id, pch->subsystem_vendor,
 272                                          pch->subsystem_device)) {
 273                         id = intel_virt_detect_pch(dev_priv);
 274                         pch_type = intel_pch_type(dev_priv, id);
 275
 276                         /* Sanity check virtual PCH id */
 277                         if (WARN_ON(id && pch_type == PCH_NONE))
 278                                 id = 0;
 279
 280                         dev_priv->pch_type = pch_type;
 281                         dev_priv->pch_id = id;
 282                         break;
 283                 }
 284         }
 285
 286         /*
 287          * Use PCH_NOP (PCH but no South Display) for PCH platforms without
 288          * display.
 289          */
 290         if (pch && INTEL_INFO(dev_priv)->num_pipes == 0) {
 291                 DRM_DEBUG_KMS("Display disabled, reverting to NOP PCH\n");
 292                 dev_priv->pch_type = PCH_NOP;
 293                 dev_priv->pch_id = 0;
 294         }
 295
 296         if (!pch)
 297                 DRM_DEBUG_KMS("No PCH found.\n");
 298
 299         pci_dev_put(pch);
 300 }
 301
 302 static int i915_getparam_ioctl(struct drm_device *dev, void *data,
 303                                struct drm_file *file_priv)
 304 {
 305         struct drm_i915_private *dev_priv = to_i915(dev);
 306         struct pci_dev *pdev = dev_priv->drm.pdev;
 307         drm_i915_getparam_t *param = data;
 308         int value;
 309
 310         switch (param->param) {
 311         case I915_PARAM_IRQ_ACTIVE:
 312         case I915_PARAM_ALLOW_BATCHBUFFER:
 313         case I915_PARAM_LAST_DISPATCH:
 314         case I915_PARAM_HAS_EXEC_CONSTANTS:
 315                 /* Reject all old ums/dri params. */
 316                 return -ENODEV;
 317         case I915_PARAM_CHIPSET_ID:
 318                 value = pdev->device;
 319                 break;
 320         case I915_PARAM_REVISION:
 321                 value = pdev->revision;
 322                 break;
 323         case I915_PARAM_NUM_FENCES_AVAIL:
 324                 value = dev_priv->num_fence_regs;
 325                 break;
 326         case I915_PARAM_HAS_OVERLAY:
 327                 value = dev_priv->overlay ? 1 : 0;
 328                 break;
 329         case I915_PARAM_HAS_BSD:
 330                 value = !!dev_priv->engine[VCS];
 331                 break;
 332         case I915_PARAM_HAS_BLT:
 333                 value = !!dev_priv->engine[BCS];
 334                 break;
 335         case I915_PARAM_HAS_VEBOX:
 336                 value = !!dev_priv->engine[VECS];
 337                 break;
 338         case I915_PARAM_HAS_BSD2:
 339                 value = !!dev_priv->engine[VCS2];
 340                 break;
 341         case I915_PARAM_HAS_LLC:
 342                 value = HAS_LLC(dev_priv);
 343                 break;
 344         case I915_PARAM_HAS_WT:
 345                 value = HAS_WT(dev_priv);
 346                 break;
 347         case I915_PARAM_HAS_ALIASING_PPGTT:
 348                 value = USES_PPGTT(dev_priv);
 349                 break;
 350         case I915_PARAM_HAS_SEMAPHORES:
 351                 value = HAS_LEGACY_SEMAPHORES(dev_priv);
 352                 break;
 353         case I915_PARAM_HAS_SECURE_BATCHES:
 354                 value = capable(CAP_SYS_ADMIN);
 355                 break;
 356         case I915_PARAM_CMD_PARSER_VERSION:
 357                 value = i915_cmd_parser_get_version(dev_priv);
 358                 break;
 359         case I915_PARAM_SUBSLICE_TOTAL:
 360                 value = sseu_subslice_total(&INTEL_INFO(dev_priv)->sseu);
 361                 if (!value)
 362                         return -ENODEV;
 363                 break;
 364         case I915_PARAM_EU_TOTAL:
 365                 value = INTEL_INFO(dev_priv)->sseu.eu_total;
 366                 if (!value)
 367                         return -ENODEV;
 368                 break;
 369         case I915_PARAM_HAS_GPU_RESET:
 370                 value = i915_modparams.enable_hangcheck &&
 371                         intel_has_gpu_reset(dev_priv);
 372                 if (value && intel_has_reset_engine(dev_priv))
 373                         value = 2;
 374                 break;
 375         case I915_PARAM_HAS_RESOURCE_STREAMER:
 376                 value = HAS_RESOURCE_STREAMER(dev_priv);
 377                 break;
 378         case I915_PARAM_HAS_POOLED_EU:
 379                 value = HAS_POOLED_EU(dev_priv);
 380                 break;
 381         case I915_PARAM_MIN_EU_IN_POOL:
 382                 value = INTEL_INFO(dev_priv)->sseu.min_eu_in_pool;
 383                 break;
 384         case I915_PARAM_HUC_STATUS:
 385                 value = intel_huc_check_status(&dev_priv->huc);
 386                 if (value < 0)
 387                         return value;
 388                 break;
 389         case I915_PARAM_MMAP_GTT_VERSION:
 390                 /* Though we've started our numbering from 1, and so class all
 391                  * earlier versions as 0, in effect their value is undefined as
 392                  * the ioctl will report EINVAL for the unknown param!
 393                  */
 394                 value = i915_gem_mmap_gtt_version();
 395                 break;
 396         case I915_PARAM_HAS_SCHEDULER:
 397                 value = dev_priv->caps.scheduler;
 398                 break;
 399
 400         case I915_PARAM_MMAP_VERSION:
 401                 /* Remember to bump this if the version changes! */
 402         case I915_PARAM_HAS_GEM:
 403         case I915_PARAM_HAS_PAGEFLIPPING:
 404         case I915_PARAM_HAS_EXECBUF2: /* depends on GEM */
 405         case I915_PARAM_HAS_RELAXED_FENCING:
 406         case I915_PARAM_HAS_COHERENT_RINGS:
 407         case I915_PARAM_HAS_RELAXED_DELTA:
 408         case I915_PARAM_HAS_GEN7_SOL_RESET:
 409         case I915_PARAM_HAS_WAIT_TIMEOUT:
 410         case I915_PARAM_HAS_PRIME_VMAP_FLUSH:
 411         case I915_PARAM_HAS_PINNED_BATCHES:
 412         case I915_PARAM_HAS_EXEC_NO_RELOC:
 413         case I915_PARAM_HAS_EXEC_HANDLE_LUT:
 414         case I915_PARAM_HAS_COHERENT_PHYS_GTT:
 415         case I915_PARAM_HAS_EXEC_SOFTPIN:
 416         case I915_PARAM_HAS_EXEC_ASYNC:
 417         case I915_PARAM_HAS_EXEC_FENCE:
 418         case I915_PARAM_HAS_EXEC_CAPTURE:
 419         case I915_PARAM_HAS_EXEC_BATCH_FIRST:
 420         case I915_PARAM_HAS_EXEC_FENCE_ARRAY:
 421                 /* For the time being all of these are always true;
 422                  * if some supported hardware does not have one of these
 423                  * features this value needs to be provided from
 424                  * INTEL_INFO(), a feature macro, or similar.
 425                  */
 426                 value = 1;
 427                 break;
 428         case I915_PARAM_HAS_CONTEXT_ISOLATION:
 429                 value = intel_engines_has_context_isolation(dev_priv);
 430                 break;
 431         case I915_PARAM_SLICE_MASK:
 432                 value = INTEL_INFO(dev_priv)->sseu.slice_mask;
 433                 if (!value)
 434                         return -ENODEV;
 435                 break;
 436         case I915_PARAM_SUBSLICE_MASK:
 437                 value = INTEL_INFO(dev_priv)->sseu.subslice_mask[0];
 438                 if (!value)
 439                         return -ENODEV;
 440                 break;
 441         case I915_PARAM_CS_TIMESTAMP_FREQUENCY:
 442                 value = 1000 * INTEL_INFO(dev_priv)->cs_timestamp_frequency_khz;
 443                 break;
 444         default:
 445                 DRM_DEBUG("Unknown parameter %d\n", param->param);
 446                 return -EINVAL;
 447         }
 448
 449         if (put_user(value, param->value))
 450                 return -EFAULT;
 451
 452         return 0;
 453 }
 454
 455 static int i915_get_bridge_dev(struct drm_i915_private *dev_priv)
 456 {
 457         int domain = pci_domain_nr(dev_priv->drm.pdev->bus);
 458
 459         dev_priv->bridge_dev =
 460                 pci_get_domain_bus_and_slot(domain, 0, PCI_DEVFN(0, 0));
 461         if (!dev_priv->bridge_dev) {
 462                 DRM_ERROR("bridge device not found\n");
 463                 return -1;
 464         }
 465         return 0;
 466 }
 467
 468 /* Allocate space for the MCH regs if needed, return nonzero on error */
 469 static int
 470 intel_alloc_mchbar_resource(struct drm_i915_private *dev_priv)
 471 {
 472         int reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 473         u32 temp_lo, temp_hi = 0;
 474         u64 mchbar_addr;
 475         int ret;
 476
 477         if (INTEL_GEN(dev_priv) >= 4)
 478                 pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
 479         pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
 480         mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
 481
 482         /* If ACPI doesn't have it, assume we need to allocate it ourselves */
 483 #ifdef CONFIG_PNP
 484         if (mchbar_addr &&
 485             pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
 486                 return 0;
 487 #endif
 488
 489         /* Get some space for it */
 490         dev_priv->mch_res.name = "i915 MCHBAR";
 491         dev_priv->mch_res.flags = IORESOURCE_MEM;
 492         ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
 493                                      &dev_priv->mch_res,
 494                                      MCHBAR_SIZE, MCHBAR_SIZE,
 495                                      PCIBIOS_MIN_MEM,
 496                                      0, pcibios_align_resource,
 497                                      dev_priv->bridge_dev);
 498         if (ret) {
 499                 DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
 500                 dev_priv->mch_res.start = 0;
 501                 return ret;
 502         }
 503
 504         if (INTEL_GEN(dev_priv) >= 4)
 505                 pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
 506                                        upper_32_bits(dev_priv->mch_res.start));
 507
 508         pci_write_config_dword(dev_priv->bridge_dev, reg,
 509                                lower_32_bits(dev_priv->mch_res.start));
 510         return 0;
 511 }
 512
 513 /* Setup MCHBAR if possible, return true if we should disable it again */
 514 static void
 515 intel_setup_mchbar(struct drm_i915_private *dev_priv)
 516 {
 517         int mchbar_reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 518         u32 temp;
 519         bool enabled;
 520
 521         if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 522                 return;
 523
 524         dev_priv->mchbar_need_disable = false;
 525
 526         if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
 527                 pci_read_config_dword(dev_priv->bridge_dev, DEVEN, &temp);
 528                 enabled = !!(temp & DEVEN_MCHBAR_EN);
 529         } else {
 530                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 531                 enabled = temp & 1;
 532         }
 533
 534         /* If it's already enabled, don't have to do anything */
 535         if (enabled)
 536                 return;
 537
 538         if (intel_alloc_mchbar_resource(dev_priv))
 539                 return;
 540
 541         dev_priv->mchbar_need_disable = true;
 542
 543         /* Space is allocated or reserved, so enable it. */
 544         if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
 545                 pci_write_config_dword(dev_priv->bridge_dev, DEVEN,
 546                                        temp | DEVEN_MCHBAR_EN);
 547         } else {
 548                 pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 549                 pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
 550         }
 551 }
 552
 553 static void
 554 intel_teardown_mchbar(struct drm_i915_private *dev_priv)
 555 {
 556         int mchbar_reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 557
 558         if (dev_priv->mchbar_need_disable) {
 559                 if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
 560                         u32 deven_val;
 561
 562                         pci_read_config_dword(dev_priv->bridge_dev, DEVEN,
 563                                               &deven_val);
 564                         deven_val &= ~DEVEN_MCHBAR_EN;
 565                         pci_write_config_dword(dev_priv->bridge_dev, DEVEN,
 566                                                deven_val);
 567                 } else {
 568                         u32 mchbar_val;
 569
 570                         pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg,
 571                                               &mchbar_val);
 572                         mchbar_val &= ~1;
 573                         pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg,
 574                                                mchbar_val);
 575                 }
 576         }
 577
 578         if (dev_priv->mch_res.start)
 579                 release_resource(&dev_priv->mch_res);
 580 }
 581
 582 /* true = enable decode, false = disable decoder */
 583 static unsigned int i915_vga_set_decode(void *cookie, bool state)
 584 {
 585         struct drm_i915_private *dev_priv = cookie;
 586
 587         intel_modeset_vga_set_state(dev_priv, state);
 588         if (state)
 589                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
 590                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
 591         else
 592                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
 593 }
 594
 595 static int i915_resume_switcheroo(struct drm_device *dev);
 596 static int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state);
 597
 598 static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
 599 {
 600         struct drm_device *dev = pci_get_drvdata(pdev);
 601         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
 602
 603         if (state == VGA_SWITCHEROO_ON) {
 604                 pr_info("switched on\n");
 605                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 606                 /* i915 resume handler doesn't set to D0 */
 607                 pci_set_power_state(pdev, PCI_D0);
 608                 i915_resume_switcheroo(dev);
 609                 dev->switch_power_state = DRM_SWITCH_POWER_ON;
 610         } else {
 611                 pr_info("switched off\n");
 612                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 613                 i915_suspend_switcheroo(dev, pmm);
 614                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
 615         }
 616 }
 617
 618 static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
 619 {
 620         struct drm_device *dev = pci_get_drvdata(pdev);
 621
 622         /*
 623          * FIXME: open_count is protected by drm_global_mutex but that would lead to
 624          * locking inversion with the driver load path. And the access here is
 625          * completely racy anyway. So don't bother with locking for now.
 626          */
 627         return dev->open_count == 0;
 628 }
 629
 630 static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
 631         .set_gpu_state = i915_switcheroo_set_state,
 632         .reprobe = NULL,
 633         .can_switch = i915_switcheroo_can_switch,
 634 };
 635
 636 static int i915_load_modeset_init(struct drm_device *dev)
 637 {
 638         struct drm_i915_private *dev_priv = to_i915(dev);
 639         struct pci_dev *pdev = dev_priv->drm.pdev;
 640         int ret;
 641
 642         if (i915_inject_load_failure())
 643                 return -ENODEV;
 644
 645         intel_bios_init(dev_priv);
 646
 647         /* If we have > 1 VGA cards, then we need to arbitrate access
 648          * to the common VGA resources.
 649          *
 650          * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
 651          * then we do not take part in VGA arbitration and the
 652          * vga_client_register() fails with -ENODEV.
 653          */
 654         ret = vga_client_register(pdev, dev_priv, NULL, i915_vga_set_decode);
 655         if (ret && ret != -ENODEV)
 656                 goto out;
 657
 658         intel_register_dsm_handler();
 659
 660         ret = vga_switcheroo_register_client(pdev, &i915_switcheroo_ops, false);
 661         if (ret)
 662                 goto cleanup_vga_client;
 663
 664         /* must happen before intel_power_domains_init_hw() on VLV/CHV */
 665         intel_update_rawclk(dev_priv);
 666
 667         intel_power_domains_init_hw(dev_priv, false);
 668
 669         intel_csr_ucode_init(dev_priv);
 670
 671         ret = intel_irq_install(dev_priv);
 672         if (ret)
 673                 goto cleanup_csr;
 674
 675         intel_setup_gmbus(dev_priv);
 676
 677         /* Important: The output setup functions called by modeset_init need
 678          * working irqs for e.g. gmbus and dp aux transfers. */
 679         ret = intel_modeset_init(dev);
 680         if (ret)
 681                 goto cleanup_irq;
 682
 683         ret = i915_gem_init(dev_priv);
 684         if (ret)
 685                 goto cleanup_modeset;
 686
 687         intel_setup_overlay(dev_priv);
 688
 689         if (INTEL_INFO(dev_priv)->num_pipes == 0)
 690                 return 0;
 691
 692         ret = intel_fbdev_init(dev);
 693         if (ret)
 694                 goto cleanup_gem;
 695
 696         /* Only enable hotplug handling once the fbdev is fully set up. */
 697         intel_hpd_init(dev_priv);
 698
 699         return 0;
 700
 701 cleanup_gem:
 702         if (i915_gem_suspend(dev_priv))
 703                 DRM_ERROR("failed to idle hardware; continuing to unload!\n");
 704         i915_gem_fini(dev_priv);
 705 cleanup_modeset:
 706         intel_modeset_cleanup(dev);
 707 cleanup_irq:
 708         drm_irq_uninstall(dev);
 709         intel_teardown_gmbus(dev_priv);
 710 cleanup_csr:
 711         intel_csr_ucode_fini(dev_priv);
 712         intel_power_domains_fini(dev_priv);
 713         vga_switcheroo_unregister_client(pdev);
 714 cleanup_vga_client:
 715         vga_client_register(pdev, NULL, NULL, NULL);
 716 out:
 717         return ret;
 718 }
 719
 720 static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
 721 {
 722         struct apertures_struct *ap;
 723         struct pci_dev *pdev = dev_priv->drm.pdev;
 724         struct i915_ggtt *ggtt = &dev_priv->ggtt;
 725         bool primary;
 726         int ret;
 727
 728         ap = alloc_apertures(1);
 729         if (!ap)
 730                 return -ENOMEM;
 731
 732         ap->ranges[0].base = ggtt->gmadr.start;
 733         ap->ranges[0].size = ggtt->mappable_end;
 734
 735         primary =
 736                 pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
 737
 738         ret = drm_fb_helper_remove_conflicting_framebuffers(ap, "inteldrmfb", primary);
 739
 740         kfree(ap);
 741
 742         return ret;
 743 }
 744
 745 #if !defined(CONFIG_VGA_CONSOLE)
 746 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
 747 {
 748         return 0;
 749 }
 750 #elif !defined(CONFIG_DUMMY_CONSOLE)
 751 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
 752 {
 753         return -ENODEV;
 754 }
 755 #else
 756 static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
 757 {
 758         int ret = 0;
 759
 760         DRM_INFO("Replacing VGA console driver\n");
 761
 762         console_lock();
 763         if (con_is_bound(&vga_con))
 764                 ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
 765         if (ret == 0) {
 766                 ret = do_unregister_con_driver(&vga_con);
 767
 768                 /* Ignore "already unregistered". */
 769                 if (ret == -ENODEV)
 770                         ret = 0;
 771         }
 772         console_unlock();
 773
 774         return ret;
 775 }
 776 #endif
 777
 778 static void intel_init_dpio(struct drm_i915_private *dev_priv)
 779 {
 780         /*
 781          * IOSF_PORT_DPIO is used for VLV x2 PHY (DP/HDMI B and C),
 782          * CHV x1 PHY (DP/HDMI D)
 783          * IOSF_PORT_DPIO_2 is used for CHV x2 PHY (DP/HDMI B and C)
 784          */
 785         if (IS_CHERRYVIEW(dev_priv)) {
 786                 DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO_2;
 787                 DPIO_PHY_IOSF_PORT(DPIO_PHY1) = IOSF_PORT_DPIO;
 788         } else if (IS_VALLEYVIEW(dev_priv)) {
 789                 DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO;
 790         }
 791 }
 792
 793 static int i915_workqueues_init(struct drm_i915_private *dev_priv)
 794 {
 795         /*
 796          * The i915 workqueue is primarily used for batched retirement of
 797          * requests (and thus managing bo) once the task has been completed
 798          * by the GPU. i915_retire_requests() is called directly when we
 799          * need high-priority retirement, such as waiting for an explicit
 800          * bo.
 801          *
 802          * It is also used for periodic low-priority events, such as
 803          * idle-timers and recording error state.
 804          *
 805          * All tasks on the workqueue are expected to acquire the dev mutex
 806          * so there is no point in running more than one instance of the
 807          * workqueue at any time.  Use an ordered one.
 808          */
 809         dev_priv->wq = alloc_ordered_workqueue("i915", 0);
 810         if (dev_priv->wq == NULL)
 811                 goto out_err;
 812
 813         dev_priv->hotplug.dp_wq = alloc_ordered_workqueue("i915-dp", 0);
 814         if (dev_priv->hotplug.dp_wq == NULL)
 815                 goto out_free_wq;
 816
 817         return 0;
 818
 819 out_free_wq:
 820         destroy_workqueue(dev_priv->wq);
 821 out_err:
 822         DRM_ERROR("Failed to allocate workqueues.\n");
 823
 824         return -ENOMEM;
 825 }
 826
 827 static void i915_engines_cleanup(struct drm_i915_private *i915)
 828 {
 829         struct intel_engine_cs *engine;
 830         enum intel_engine_id id;
 831
 832         for_each_engine(engine, i915, id)
 833                 kfree(engine);
 834 }
 835
 836 static void i915_workqueues_cleanup(struct drm_i915_private *dev_priv)
 837 {
 838         destroy_workqueue(dev_priv->hotplug.dp_wq);
 839         destroy_workqueue(dev_priv->wq);
 840 }
 841
 842 /*
 843  * We don't keep the workarounds for pre-production hardware, so we expect our
 844  * driver to fail on these machines in one way or another. A little warning on
 845  * dmesg may help both the user and the bug triagers.
 846  *
 847  * Our policy for removing pre-production workarounds is to keep the
 848  * current gen workarounds as a guide to the bring-up of the next gen
 849  * (workarounds have a habit of persisting!). Anything older than that
 850  * should be removed along with the complications they introduce.
 851  */
 852 static void intel_detect_preproduction_hw(struct drm_i915_private *dev_priv)
 853 {
 854         bool pre = false;
 855
 856         pre |= IS_HSW_EARLY_SDV(dev_priv);
 857         pre |= IS_SKL_REVID(dev_priv, 0, SKL_REVID_F0);
 858         pre |= IS_BXT_REVID(dev_priv, 0, BXT_REVID_B_LAST);
 859
 860         if (pre) {
 861                 DRM_ERROR("This is a pre-production stepping. "
 862                           "It may not be fully functional.\n");
 863                 add_taint(TAINT_MACHINE_CHECK, LOCKDEP_STILL_OK);
 864         }
 865 }
 866
 867 /**
 868  * i915_driver_init_early - setup state not requiring device access
 869  * @dev_priv: device private
 870  * @ent: the matching pci_device_id
 871  *
 872  * Initialize everything that is a "SW-only" state, that is state not
 873  * requiring accessing the device or exposing the driver via kernel internal
 874  * or userspace interfaces. Example steps belonging here: lock initialization,
 875  * system memory allocation, setting up device specific attributes and
 876  * function hooks not requiring accessing the device.
 877  */
 878 static int i915_driver_init_early(struct drm_i915_private *dev_priv,
 879                                   const struct pci_device_id *ent)
 880 {
 881         const struct intel_device_info *match_info =
 882                 (struct intel_device_info *)ent->driver_data;
 883         struct intel_device_info *device_info;
 884         int ret = 0;
 885
 886         if (i915_inject_load_failure())
 887                 return -ENODEV;
 888
 889         /* Setup the write-once "constant" device info */
 890         device_info = mkwrite_device_info(dev_priv);
 891         memcpy(device_info, match_info, sizeof(*device_info));
 892         device_info->device_id = dev_priv->drm.pdev->device;
 893
 894         BUILD_BUG_ON(INTEL_MAX_PLATFORMS >
 895                      sizeof(device_info->platform_mask) * BITS_PER_BYTE);
 896         BUG_ON(device_info->gen > sizeof(device_info->gen_mask) * BITS_PER_BYTE);
 897         spin_lock_init(&dev_priv->irq_lock);
 898         spin_lock_init(&dev_priv->gpu_error.lock);
 899         mutex_init(&dev_priv->backlight_lock);
 900         spin_lock_init(&dev_priv->uncore.lock);
 901
 902         mutex_init(&dev_priv->sb_lock);
 903         mutex_init(&dev_priv->modeset_restore_lock);
 904         mutex_init(&dev_priv->av_mutex);
 905         mutex_init(&dev_priv->wm.wm_mutex);
 906         mutex_init(&dev_priv->pps_mutex);
 907
 908         i915_memcpy_init_early(dev_priv);
 909
 910         ret = i915_workqueues_init(dev_priv);
 911         if (ret < 0)
 912                 goto err_engines;
 913
 914         ret = i915_gem_init_early(dev_priv);
 915         if (ret < 0)
 916                 goto err_workqueues;
 917
 918         /* This must be called before any calls to HAS_PCH_* */
 919         intel_detect_pch(dev_priv);
 920
 921         intel_wopcm_init_early(&dev_priv->wopcm);
 922         intel_uc_init_early(dev_priv);
 923         intel_pm_setup(dev_priv);
 924         intel_init_dpio(dev_priv);
 925         intel_power_domains_init(dev_priv);
 926         intel_irq_init(dev_priv);
 927         intel_hangcheck_init(dev_priv);
 928         intel_init_display_hooks(dev_priv);
 929         intel_init_clock_gating_hooks(dev_priv);
 930         intel_init_audio_hooks(dev_priv);
 931         intel_display_crc_init(dev_priv);
 932
 933         intel_detect_preproduction_hw(dev_priv);
 934
 935         return 0;
 936
 937 err_workqueues:
 938         i915_workqueues_cleanup(dev_priv);
 939 err_engines:
 940         i915_engines_cleanup(dev_priv);
 941         return ret;
 942 }
 943
 944 /**
 945  * i915_driver_cleanup_early - cleanup the setup done in i915_driver_init_early()
 946  * @dev_priv: device private
 947  */
 948 static void i915_driver_cleanup_early(struct drm_i915_private *dev_priv)
 949 {
 950         intel_irq_fini(dev_priv);
 951         intel_uc_cleanup_early(dev_priv);
 952         i915_gem_cleanup_early(dev_priv);
 953         i915_workqueues_cleanup(dev_priv);
 954         i915_engines_cleanup(dev_priv);
 955 }
 956
 957 static int i915_mmio_setup(struct drm_i915_private *dev_priv)
 958 {
 959         struct pci_dev *pdev = dev_priv->drm.pdev;
 960         int mmio_bar;
 961         int mmio_size;
 962
 963         mmio_bar = IS_GEN2(dev_priv) ? 1 : 0;
 964         /*
 965          * Before gen4, the registers and the GTT are behind different BARs.
 966          * However, from gen4 onwards, the registers and the GTT are shared
 967          * in the same BAR, so we want to restrict this ioremap from
 968          * clobbering the GTT which we want ioremap_wc instead. Fortunately,
 969          * the register BAR remains the same size for all the earlier
 970          * generations up to Ironlake.
 971          */
 972         if (INTEL_GEN(dev_priv) < 5)
 973                 mmio_size = 512 * 1024;
 974         else
 975                 mmio_size = 2 * 1024 * 1024;
 976         dev_priv->regs = pci_iomap(pdev, mmio_bar, mmio_size);
 977         if (dev_priv->regs == NULL) {
 978                 DRM_ERROR("failed to map registers\n");
 979
 980                 return -EIO;
 981         }
 982
 983         /* Try to make sure MCHBAR is enabled before poking at it */
 984         intel_setup_mchbar(dev_priv);
 985
 986         return 0;
 987 }
 988
 989 static void i915_mmio_cleanup(struct drm_i915_private *dev_priv)
 990 {
 991         struct pci_dev *pdev = dev_priv->drm.pdev;
 992
 993         intel_teardown_mchbar(dev_priv);
 994         pci_iounmap(pdev, dev_priv->regs);
 995 }
 996
 997 /**
 998  * i915_driver_init_mmio - setup device MMIO
 999  * @dev_priv: device private
1000  *
1001  * Setup minimal device state necessary for MMIO accesses later in the
1002  * initialization sequence. The setup here should avoid any other device-wide
1003  * side effects or exposing the driver via kernel internal or user space
1004  * interfaces.
1005  */
1006 static int i915_driver_init_mmio(struct drm_i915_private *dev_priv)
1007 {
1008         int ret;
1009
1010         if (i915_inject_load_failure())
1011                 return -ENODEV;
1012
1013         if (i915_get_bridge_dev(dev_priv))
1014                 return -EIO;
1015
1016         ret = i915_mmio_setup(dev_priv);
1017         if (ret < 0)
1018                 goto err_bridge;
1019
1020         intel_uncore_init(dev_priv);
1021
1022         intel_device_info_init_mmio(dev_priv);
1023
1024         intel_uncore_prune(dev_priv);
1025
1026         intel_uc_init_mmio(dev_priv);
1027
1028         ret = intel_engines_init_mmio(dev_priv);
1029         if (ret)
1030                 goto err_uncore;
1031
1032         i915_gem_init_mmio(dev_priv);
1033
1034         return 0;
1035
1036 err_uncore:
1037         intel_uncore_fini(dev_priv);
1038 err_bridge:
1039         pci_dev_put(dev_priv->bridge_dev);
1040
1041         return ret;
1042 }
1043
1044 /**
1045  * i915_driver_cleanup_mmio - cleanup the setup done in i915_driver_init_mmio()
1046  * @dev_priv: device private
1047  */
1048 static void i915_driver_cleanup_mmio(struct drm_i915_private *dev_priv)
1049 {
1050         intel_uncore_fini(dev_priv);
1051         i915_mmio_cleanup(dev_priv);
1052         pci_dev_put(dev_priv->bridge_dev);
1053 }
1054
1055 static void intel_sanitize_options(struct drm_i915_private *dev_priv)
1056 {
1057         /*
1058          * i915.enable_ppgtt is read-only, so do an early pass to validate the
1059          * user's requested state against the hardware/driver capabilities.  We
1060          * do this now so that we can print out any log messages once rather
1061          * than every time we check intel_enable_ppgtt().
1062          */
1063         i915_modparams.enable_ppgtt =
1064                 intel_sanitize_enable_ppgtt(dev_priv,
1065                                             i915_modparams.enable_ppgtt);
1066         DRM_DEBUG_DRIVER("ppgtt mode: %i\n", i915_modparams.enable_ppgtt);
1067
1068         intel_gvt_sanitize_options(dev_priv);
1069 }
1070
1071 /**
1072  * i915_driver_init_hw - setup state requiring device access
1073  * @dev_priv: device private
1074  *
1075  * Setup state that requires accessing the device, but doesn't require
1076  * exposing the driver via kernel internal or userspace interfaces.
1077  */
1078 static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
1079 {
1080         struct pci_dev *pdev = dev_priv->drm.pdev;
1081         int ret;
1082
1083         if (i915_inject_load_failure())
1084                 return -ENODEV;
1085
1086         intel_device_info_runtime_init(mkwrite_device_info(dev_priv));
1087
1088         intel_sanitize_options(dev_priv);
1089
1090         i915_perf_init(dev_priv);
1091
1092         ret = i915_ggtt_probe_hw(dev_priv);
1093         if (ret)
1094                 goto err_perf;
1095
1096         /*
1097          * WARNING: Apparently we must kick fbdev drivers before vgacon,
1098          * otherwise the vga fbdev driver falls over.
1099          */
1100         ret = i915_kick_out_firmware_fb(dev_priv);
1101         if (ret) {
1102                 DRM_ERROR("failed to remove conflicting framebuffer drivers\n");
1103                 goto err_ggtt;
1104         }
1105
1106         ret = i915_kick_out_vgacon(dev_priv);
1107         if (ret) {
1108                 DRM_ERROR("failed to remove conflicting VGA console\n");
1109                 goto err_ggtt;
1110         }
1111
1112         ret = i915_ggtt_init_hw(dev_priv);
1113         if (ret)
1114                 goto err_ggtt;
1115
1116         ret = i915_ggtt_enable_hw(dev_priv);
1117         if (ret) {
1118                 DRM_ERROR("failed to enable GGTT\n");
1119                 goto err_ggtt;
1120         }
1121
1122         pci_set_master(pdev);
1123
1124         /* overlay on gen2 is broken and can't address above 1G */
1125         if (IS_GEN2(dev_priv)) {
1126                 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(30));
1127                 if (ret) {
1128                         DRM_ERROR("failed to set DMA mask\n");
1129
1130                         goto err_ggtt;
1131                 }
1132         }
1133
1134         /* 965GM sometimes incorrectly writes to hardware status page (HWS)
1135          * using 32bit addressing, overwriting memory if HWS is located
1136          * above 4GB.
1137          *
1138          * The documentation also mentions an issue with undefined
1139          * behaviour if any general state is accessed within a page above 4GB,
1140          * which also needs to be handled carefully.
1141          */
1142         if (IS_I965G(dev_priv) || IS_I965GM(dev_priv)) {
1143                 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1144
1145                 if (ret) {
1146                         DRM_ERROR("failed to set DMA mask\n");
1147
1148                         goto err_ggtt;
1149                 }
1150         }
1151
1152         pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY,
1153                            PM_QOS_DEFAULT_VALUE);
1154
1155         intel_uncore_sanitize(dev_priv);
1156
1157         i915_gem_load_init_fences(dev_priv);
1158
1159         /* On the 945G/GM, the chipset reports the MSI capability on the
1160          * integrated graphics even though the support isn't actually there
1161          * according to the published specs.  It doesn't appear to function
1162          * correctly in testing on 945G.
1163          * This may be a side effect of MSI having been made available for PEG
1164          * and the registers being closely associated.
1165          *
1166          * According to chipset errata, on the 965GM, MSI interrupts may
1167          * be lost or delayed, and was defeatured. MSI interrupts seem to
1168          * get lost on g4x as well, and interrupt delivery seems to stay
1169          * properly dead afterwards. So we'll just disable them for all
1170          * pre-gen5 chipsets.
1171          *
1172          * dp aux and gmbus irq on gen4 seems to be able to generate legacy
1173          * interrupts even when in MSI mode. This results in spurious
1174          * interrupt warnings if the legacy irq no. is shared with another
1175          * device. The kernel then disables that interrupt source and so
1176          * prevents the other device from working properly.
1177          */
1178         if (INTEL_GEN(dev_priv) >= 5) {
1179                 if (pci_enable_msi(pdev) < 0)
1180                         DRM_DEBUG_DRIVER("can't enable MSI");
1181         }
1182
1183         ret = intel_gvt_init(dev_priv);
1184         if (ret)
1185                 goto err_msi;
1186
1187         intel_opregion_setup(dev_priv);
1188
1189         return 0;
1190
1191 err_msi:
1192         if (pdev->msi_enabled)
1193                 pci_disable_msi(pdev);
1194         pm_qos_remove_request(&dev_priv->pm_qos);
1195 err_ggtt:
1196         i915_ggtt_cleanup_hw(dev_priv);
1197 err_perf:
1198         i915_perf_fini(dev_priv);
1199         return ret;
1200 }
1201
1202 /**
1203  * i915_driver_cleanup_hw - cleanup the setup done in i915_driver_init_hw()
1204  * @dev_priv: device private
1205  */
1206 static void i915_driver_cleanup_hw(struct drm_i915_private *dev_priv)
1207 {
1208         struct pci_dev *pdev = dev_priv->drm.pdev;
1209
1210         i915_perf_fini(dev_priv);
1211
1212         if (pdev->msi_enabled)
1213                 pci_disable_msi(pdev);
1214
1215         pm_qos_remove_request(&dev_priv->pm_qos);
1216         i915_ggtt_cleanup_hw(dev_priv);
1217 }
1218
1219 /**
1220  * i915_driver_register - register the driver with the rest of the system
1221  * @dev_priv: device private
1222  *
1223  * Perform any steps necessary to make the driver available via kernel
1224  * internal or userspace interfaces.
1225  */
1226 static void i915_driver_register(struct drm_i915_private *dev_priv)
1227 {
1228         struct drm_device *dev = &dev_priv->drm;
1229
1230         i915_gem_shrinker_register(dev_priv);
1231         i915_pmu_register(dev_priv);
1232
1233         /*
1234          * Notify a valid surface after modesetting,
1235          * when running inside a VM.
1236          */
1237         if (intel_vgpu_active(dev_priv))
1238                 I915_WRITE(vgtif_reg(display_ready), VGT_DRV_DISPLAY_READY);
1239
1240         /* Reveal our presence to userspace */
1241         if (drm_dev_register(dev, 0) == 0) {
1242                 i915_debugfs_register(dev_priv);
1243                 i915_setup_sysfs(dev_priv);
1244
1245                 /* Depends on sysfs having been initialized */
1246                 i915_perf_register(dev_priv);
1247         } else
1248                 DRM_ERROR("Failed to register driver for userspace access!\n");
1249
1250         if (INTEL_INFO(dev_priv)->num_pipes) {
1251                 /* Must be done after probing outputs */
1252                 intel_opregion_register(dev_priv);
1253                 acpi_video_register();
1254         }
1255
1256         if (IS_GEN5(dev_priv))
1257                 intel_gpu_ips_init(dev_priv);
1258
1259         intel_audio_init(dev_priv);
1260
1261         /*
1262          * Some ports require correctly set-up hpd registers for detection to
1263          * work properly (leading to ghost connected connector status), e.g. VGA
1264          * on gm45.  Hence we can only set up the initial fbdev config after hpd
1265          * irqs are fully enabled. We do it last so that the async config
1266          * cannot run before the connectors are registered.
1267          */
1268         intel_fbdev_initial_config_async(dev);
1269
1270         /*
1271          * We need to coordinate the hotplugs with the asynchronous fbdev
1272          * configuration, for which we use the fbdev->async_cookie.
1273          */
1274         if (INTEL_INFO(dev_priv)->num_pipes)
1275                 drm_kms_helper_poll_init(dev);
1276 }
1277
1278 /**
1279  * i915_driver_unregister - cleanup the registration done in i915_driver_regiser()
1280  * @dev_priv: device private
1281  */
1282 static void i915_driver_unregister(struct drm_i915_private *dev_priv)
1283 {
1284         intel_fbdev_unregister(dev_priv);
1285         intel_audio_deinit(dev_priv);
1286
1287         /*
1288          * After flushing the fbdev (incl. a late async config which will
1289          * have delayed queuing of a hotplug event), then flush the hotplug
1290          * events.
1291          */
1292         drm_kms_helper_poll_fini(&dev_priv->drm);
1293
1294         intel_gpu_ips_teardown();
1295         acpi_video_unregister();
1296         intel_opregion_unregister(dev_priv);
1297
1298         i915_perf_unregister(dev_priv);
1299         i915_pmu_unregister(dev_priv);
1300
1301         i915_teardown_sysfs(dev_priv);
1302         drm_dev_unregister(&dev_priv->drm);
1303
1304         i915_gem_shrinker_unregister(dev_priv);
1305 }
1306
1307 static void i915_welcome_messages(struct drm_i915_private *dev_priv)
1308 {
1309         if (drm_debug & DRM_UT_DRIVER) {
1310                 struct drm_printer p = drm_debug_printer("i915 device info:");
1311
1312                 intel_device_info_dump(&dev_priv->info, &p);
1313                 intel_device_info_dump_runtime(&dev_priv->info, &p);
1314         }
1315
1316         if (IS_ENABLED(CONFIG_DRM_I915_DEBUG))
1317                 DRM_INFO("DRM_I915_DEBUG enabled\n");
1318         if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
1319                 DRM_INFO("DRM_I915_DEBUG_GEM enabled\n");
1320 }
1321
1322 /**
1323  * i915_driver_load - setup chip and create an initial config
1324  * @pdev: PCI device
1325  * @ent: matching PCI ID entry
1326  *
1327  * The driver load routine has to do several things:
1328  *   - drive output discovery via intel_modeset_init()
1329  *   - initialize the memory manager
1330  *   - allocate initial config memory
1331  *   - setup the DRM framebuffer with the allocated memory
1332  */
1333 int i915_driver_load(struct pci_dev *pdev, const struct pci_device_id *ent)
1334 {
1335         const struct intel_device_info *match_info =
1336                 (struct intel_device_info *)ent->driver_data;
1337         struct drm_i915_private *dev_priv;
1338         int ret;
1339
1340         /* Enable nuclear pageflip on ILK+ */
1341         if (!i915_modparams.nuclear_pageflip && match_info->gen < 5)
1342                 driver.driver_features &= ~DRIVER_ATOMIC;
1343
1344         ret = -ENOMEM;
1345         dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL);
1346         if (dev_priv)
1347                 ret = drm_dev_init(&dev_priv->drm, &driver, &pdev->dev);
1348         if (ret) {
1349                 DRM_DEV_ERROR(&pdev->dev, "allocation failed\n");
1350                 goto out_free;
1351         }
1352
1353         dev_priv->drm.pdev = pdev;
1354         dev_priv->drm.dev_private = dev_priv;
1355
1356         ret = pci_enable_device(pdev);
1357         if (ret)
1358                 goto out_fini;
1359
1360         pci_set_drvdata(pdev, &dev_priv->drm);
1361         /*
1362          * Disable the system suspend direct complete optimization, which can
1363          * leave the device suspended skipping the driver's suspend handlers
1364          * if the device was already runtime suspended. This is needed due to
1365          * the difference in our runtime and system suspend sequence and
1366          * becaue the HDA driver may require us to enable the audio power
1367          * domain during system suspend.
1368          */
1369         dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
1370
1371         ret = i915_driver_init_early(dev_priv, ent);
1372         if (ret < 0)
1373                 goto out_pci_disable;
1374
1375         intel_runtime_pm_get(dev_priv);
1376
1377         ret = i915_driver_init_mmio(dev_priv);
1378         if (ret < 0)
1379                 goto out_runtime_pm_put;
1380
1381         ret = i915_driver_init_hw(dev_priv);
1382         if (ret < 0)
1383                 goto out_cleanup_mmio;
1384
1385         /*
1386          * TODO: move the vblank init and parts of modeset init steps into one
1387          * of the i915_driver_init_/i915_driver_register functions according
1388          * to the role/effect of the given init step.
1389          */
1390         if (INTEL_INFO(dev_priv)->num_pipes) {
1391                 ret = drm_vblank_init(&dev_priv->drm,
1392                                       INTEL_INFO(dev_priv)->num_pipes);
1393                 if (ret)
1394                         goto out_cleanup_hw;
1395         }
1396
1397         ret = i915_load_modeset_init(&dev_priv->drm);
1398         if (ret < 0)
1399                 goto out_cleanup_hw;
1400
1401         i915_driver_register(dev_priv);
1402
1403         intel_runtime_pm_enable(dev_priv);
1404
1405         intel_init_ipc(dev_priv);
1406
1407         intel_runtime_pm_put(dev_priv);
1408
1409         i915_welcome_messages(dev_priv);
1410
1411         return 0;
1412
1413 out_cleanup_hw:
1414         i915_driver_cleanup_hw(dev_priv);
1415 out_cleanup_mmio:
1416         i915_driver_cleanup_mmio(dev_priv);
1417 out_runtime_pm_put:
1418         intel_runtime_pm_put(dev_priv);
1419         i915_driver_cleanup_early(dev_priv);
1420 out_pci_disable:
1421         pci_disable_device(pdev);
1422 out_fini:
1423         i915_load_error(dev_priv, "Device initialization failed (%d)\n", ret);
1424         drm_dev_fini(&dev_priv->drm);
1425 out_free:
1426         kfree(dev_priv);
1427         return ret;
1428 }
1429
1430 void i915_driver_unload(struct drm_device *dev)
1431 {
1432         struct drm_i915_private *dev_priv = to_i915(dev);
1433         struct pci_dev *pdev = dev_priv->drm.pdev;
1434
1435         i915_driver_unregister(dev_priv);
1436
1437         if (i915_gem_suspend(dev_priv))
1438                 DRM_ERROR("failed to idle hardware; continuing to unload!\n");
1439
1440         intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
1441
1442         drm_atomic_helper_shutdown(dev);
1443
1444         intel_gvt_cleanup(dev_priv);
1445
1446         intel_modeset_cleanup(dev);
1447
1448         intel_bios_cleanup(dev_priv);
1449
1450         vga_switcheroo_unregister_client(pdev);
1451         vga_client_register(pdev, NULL, NULL, NULL);
1452
1453         intel_csr_ucode_fini(dev_priv);
1454
1455         /* Free error state after interrupts are fully disabled. */
1456         cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
1457         i915_reset_error_state(dev_priv);
1458
1459         i915_gem_fini(dev_priv);
1460         intel_fbc_cleanup_cfb(dev_priv);
1461
1462         intel_power_domains_fini(dev_priv);
1463
1464         i915_driver_cleanup_hw(dev_priv);
1465         i915_driver_cleanup_mmio(dev_priv);
1466
1467         intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
1468 }
1469
1470 static void i915_driver_release(struct drm_device *dev)
1471 {
1472         struct drm_i915_private *dev_priv = to_i915(dev);
1473
1474         i915_driver_cleanup_early(dev_priv);
1475         drm_dev_fini(&dev_priv->drm);
1476
1477         kfree(dev_priv);
1478 }
1479
1480 static int i915_driver_open(struct drm_device *dev, struct drm_file *file)
1481 {
1482         struct drm_i915_private *i915 = to_i915(dev);
1483         int ret;
1484
1485         ret = i915_gem_open(i915, file);
1486         if (ret)
1487                 return ret;
1488
1489         return 0;
1490 }
1491
1492 /**
1493  * i915_driver_lastclose - clean up after all DRM clients have exited
1494  * @dev: DRM device
1495  *
1496  * Take care of cleaning up after all DRM clients have exited.  In the
1497  * mode setting case, we want to restore the kernel's initial mode (just
1498  * in case the last client left us in a bad state).
1499  *
1500  * Additionally, in the non-mode setting case, we'll tear down the GTT
1501  * and DMA structures, since the kernel won't be using them, and clea
1502  * up any GEM state.
1503  */
1504 static void i915_driver_lastclose(struct drm_device *dev)
1505 {
1506         intel_fbdev_restore_mode(dev);
1507         vga_switcheroo_process_delayed_switch();
1508 }
1509
1510 static void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
1511 {
1512         struct drm_i915_file_private *file_priv = file->driver_priv;
1513
1514         mutex_lock(&dev->struct_mutex);
1515         i915_gem_context_close(file);
1516         i915_gem_release(dev, file);
1517         mutex_unlock(&dev->struct_mutex);
1518
1519         kfree(file_priv);
1520 }
1521
1522 static void intel_suspend_encoders(struct drm_i915_private *dev_priv)
1523 {
1524         struct drm_device *dev = &dev_priv->drm;
1525         struct intel_encoder *encoder;
1526
1527         drm_modeset_lock_all(dev);
1528         for_each_intel_encoder(dev, encoder)
1529                 if (encoder->suspend)
1530                         encoder->suspend(encoder);
1531         drm_modeset_unlock_all(dev);
1532 }
1533
1534 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
1535                               bool rpm_resume);
1536 static int vlv_suspend_complete(struct drm_i915_private *dev_priv);
1537
1538 static bool suspend_to_idle(struct drm_i915_private *dev_priv)
1539 {
1540 #if IS_ENABLED(CONFIG_ACPI_SLEEP)
1541         if (acpi_target_system_state() < ACPI_STATE_S3)
1542                 return true;
1543 #endif
1544         return false;
1545 }
1546
1547 static int i915_drm_prepare(struct drm_device *dev)
1548 {
1549         struct drm_i915_private *i915 = to_i915(dev);
1550         int err;
1551
1552         /*
1553          * NB intel_display_suspend() may issue new requests after we've
1554          * ostensibly marked the GPU as ready-to-sleep here. We need to
1555          * split out that work and pull it forward so that after point,
1556          * the GPU is not woken again.
1557          */
1558         err = i915_gem_suspend(i915);
1559         if (err)
1560                 dev_err(&i915->drm.pdev->dev,
1561                         "GEM idle failed, suspend/resume might fail\n");
1562
1563         return err;
1564 }
1565
1566 static int i915_drm_suspend(struct drm_device *dev)
1567 {
1568         struct drm_i915_private *dev_priv = to_i915(dev);
1569         struct pci_dev *pdev = dev_priv->drm.pdev;
1570         pci_power_t opregion_target_state;
1571
1572         /* ignore lid events during suspend */
1573         mutex_lock(&dev_priv->modeset_restore_lock);
1574         dev_priv->modeset_restore = MODESET_SUSPENDED;
1575         mutex_unlock(&dev_priv->modeset_restore_lock);
1576
1577         disable_rpm_wakeref_asserts(dev_priv);
1578
1579         /* We do a lot of poking in a lot of registers, make sure they work
1580          * properly. */
1581         intel_display_set_init_power(dev_priv, true);
1582
1583         drm_kms_helper_poll_disable(dev);
1584
1585         pci_save_state(pdev);
1586
1587         intel_display_suspend(dev);
1588
1589         intel_dp_mst_suspend(dev);
1590
1591         intel_runtime_pm_disable_interrupts(dev_priv);
1592         intel_hpd_cancel_work(dev_priv);
1593
1594         intel_suspend_encoders(dev_priv);
1595
1596         intel_suspend_hw(dev_priv);
1597
1598         i915_gem_suspend_gtt_mappings(dev_priv);
1599
1600         i915_save_state(dev_priv);
1601
1602         opregion_target_state = suspend_to_idle(dev_priv) ? PCI_D1 : PCI_D3cold;
1603         intel_opregion_notify_adapter(dev_priv, opregion_target_state);
1604
1605         intel_opregion_unregister(dev_priv);
1606
1607         intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED, true);
1608
1609         dev_priv->suspend_count++;
1610
1611         intel_csr_ucode_suspend(dev_priv);
1612
1613         enable_rpm_wakeref_asserts(dev_priv);
1614
1615         return 0;
1616 }
1617
1618 static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
1619 {
1620         struct drm_i915_private *dev_priv = to_i915(dev);
1621         struct pci_dev *pdev = dev_priv->drm.pdev;
1622         int ret;
1623
1624         disable_rpm_wakeref_asserts(dev_priv);
1625
1626         i915_gem_suspend_late(dev_priv);
1627
1628         intel_display_set_init_power(dev_priv, false);
1629         intel_uncore_suspend(dev_priv);
1630
1631         /*
1632          * In case of firmware assisted context save/restore don't manually
1633          * deinit the power domains. This also means the CSR/DMC firmware will
1634          * stay active, it will power down any HW resources as required and
1635          * also enable deeper system power states that would be blocked if the
1636          * firmware was inactive.
1637          */
1638         if (IS_GEN9_LP(dev_priv) || hibernation || !suspend_to_idle(dev_priv) ||
1639             dev_priv->csr.dmc_payload == NULL) {
1640                 intel_power_domains_suspend(dev_priv);
1641                 dev_priv->power_domains_suspended = true;
1642         }
1643
1644         ret = 0;
1645         if (IS_GEN9_LP(dev_priv))
1646                 bxt_enable_dc9(dev_priv);
1647         else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
1648                 hsw_enable_pc8(dev_priv);
1649         else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1650                 ret = vlv_suspend_complete(dev_priv);
1651
1652         if (ret) {
1653                 DRM_ERROR("Suspend complete failed: %d\n", ret);
1654                 if (dev_priv->power_domains_suspended) {
1655                         intel_power_domains_init_hw(dev_priv, true);
1656                         dev_priv->power_domains_suspended = false;
1657                 }
1658
1659                 goto out;
1660         }
1661
1662         pci_disable_device(pdev);
1663         /*
1664          * During hibernation on some platforms the BIOS may try to access
1665          * the device even though it's already in D3 and hang the machine. So
1666          * leave the device in D0 on those platforms and hope the BIOS will
1667          * power down the device properly. The issue was seen on multiple old
1668          * GENs with different BIOS vendors, so having an explicit blacklist
1669          * is inpractical; apply the workaround on everything pre GEN6. The
1670          * platforms where the issue was seen:
1671          * Lenovo Thinkpad X301, X61s, X60, T60, X41
1672          * Fujitsu FSC S7110
1673          * Acer Aspire 1830T
1674          */
1675         if (!(hibernation && INTEL_GEN(dev_priv) < 6))
1676                 pci_set_power_state(pdev, PCI_D3hot);
1677
1678 out:
1679         enable_rpm_wakeref_asserts(dev_priv);
1680
1681         return ret;
1682 }
1683
1684 static int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state)
1685 {
1686         int error;
1687
1688         if (!dev) {
1689                 DRM_ERROR("dev: %p\n", dev);
1690                 DRM_ERROR("DRM not initialized, aborting suspend.\n");
1691                 return -ENODEV;
1692         }
1693
1694         if (WARN_ON_ONCE(state.event != PM_EVENT_SUSPEND &&
1695                          state.event != PM_EVENT_FREEZE))
1696                 return -EINVAL;
1697
1698         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1699                 return 0;
1700
1701         error = i915_drm_suspend(dev);
1702         if (error)
1703                 return error;
1704
1705         return i915_drm_suspend_late(dev, false);
1706 }
1707
1708 static int i915_drm_resume(struct drm_device *dev)
1709 {
1710         struct drm_i915_private *dev_priv = to_i915(dev);
1711         int ret;
1712
1713         disable_rpm_wakeref_asserts(dev_priv);
1714         intel_sanitize_gt_powersave(dev_priv);
1715
1716         i915_gem_sanitize(dev_priv);
1717
1718         ret = i915_ggtt_enable_hw(dev_priv);
1719         if (ret)
1720                 DRM_ERROR("failed to re-enable GGTT\n");
1721
1722         intel_csr_ucode_resume(dev_priv);
1723
1724         i915_restore_state(dev_priv);
1725         intel_pps_unlock_regs_wa(dev_priv);
1726         intel_opregion_setup(dev_priv);
1727
1728         intel_init_pch_refclk(dev_priv);
1729
1730         /*
1731          * Interrupts have to be enabled before any batches are run. If not the
1732          * GPU will hang. i915_gem_init_hw() will initiate batches to
1733          * update/restore the context.
1734          *
1735          * drm_mode_config_reset() needs AUX interrupts.
1736          *
1737          * Modeset enabling in intel_modeset_init_hw() also needs working
1738          * interrupts.
1739          */
1740         intel_runtime_pm_enable_interrupts(dev_priv);
1741
1742         drm_mode_config_reset(dev);
1743
1744         i915_gem_resume(dev_priv);
1745
1746         intel_modeset_init_hw(dev);
1747         intel_init_clock_gating(dev_priv);
1748
1749         spin_lock_irq(&dev_priv->irq_lock);
1750         if (dev_priv->display.hpd_irq_setup)
1751                 dev_priv->display.hpd_irq_setup(dev_priv);
1752         spin_unlock_irq(&dev_priv->irq_lock);
1753
1754         intel_dp_mst_resume(dev);
1755
1756         intel_display_resume(dev);
1757
1758         drm_kms_helper_poll_enable(dev);
1759
1760         /*
1761          * ... but also need to make sure that hotplug processing
1762          * doesn't cause havoc. Like in the driver load code we don't
1763          * bother with the tiny race here where we might loose hotplug
1764          * notifications.
1765          * */
1766         intel_hpd_init(dev_priv);
1767
1768         intel_opregion_register(dev_priv);
1769
1770         intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING, false);
1771
1772         mutex_lock(&dev_priv->modeset_restore_lock);
1773         dev_priv->modeset_restore = MODESET_DONE;
1774         mutex_unlock(&dev_priv->modeset_restore_lock);
1775
1776         intel_opregion_notify_adapter(dev_priv, PCI_D0);
1777
1778         enable_rpm_wakeref_asserts(dev_priv);
1779
1780         return 0;
1781 }
1782
1783 static int i915_drm_resume_early(struct drm_device *dev)
1784 {
1785         struct drm_i915_private *dev_priv = to_i915(dev);
1786         struct pci_dev *pdev = dev_priv->drm.pdev;
1787         int ret;
1788
1789         /*
1790          * We have a resume ordering issue with the snd-hda driver also
1791          * requiring our device to be power up. Due to the lack of a
1792          * parent/child relationship we currently solve this with an early
1793          * resume hook.
1794          *
1795          * FIXME: This should be solved with a special hdmi sink device or
1796          * similar so that power domains can be employed.
1797          */
1798
1799         /*
1800          * Note that we need to set the power state explicitly, since we
1801          * powered off the device during freeze and the PCI core won't power
1802          * it back up for us during thaw. Powering off the device during
1803          * freeze is not a hard requirement though, and during the
1804          * suspend/resume phases the PCI core makes sure we get here with the
1805          * device powered on. So in case we change our freeze logic and keep
1806          * the device powered we can also remove the following set power state
1807          * call.
1808          */
1809         ret = pci_set_power_state(pdev, PCI_D0);
1810         if (ret) {
1811                 DRM_ERROR("failed to set PCI D0 power state (%d)\n", ret);
1812                 goto out;
1813         }
1814
1815         /*
1816          * Note that pci_enable_device() first enables any parent bridge
1817          * device and only then sets the power state for this device. The
1818          * bridge enabling is a nop though, since bridge devices are resumed
1819          * first. The order of enabling power and enabling the device is
1820          * imposed by the PCI core as described above, so here we preserve the
1821          * same order for the freeze/thaw phases.
1822          *
1823          * TODO: eventually we should remove pci_disable_device() /
1824          * pci_enable_enable_device() from suspend/resume. Due to how they
1825          * depend on the device enable refcount we can't anyway depend on them
1826          * disabling/enabling the device.
1827          */
1828         if (pci_enable_device(pdev)) {
1829                 ret = -EIO;
1830                 goto out;
1831         }
1832
1833         pci_set_master(pdev);
1834
1835         disable_rpm_wakeref_asserts(dev_priv);
1836
1837         if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1838                 ret = vlv_resume_prepare(dev_priv, false);
1839         if (ret)
1840                 DRM_ERROR("Resume prepare failed: %d, continuing anyway\n",
1841                           ret);
1842
1843         intel_uncore_resume_early(dev_priv);
1844
1845         if (IS_GEN9_LP(dev_priv)) {
1846                 gen9_sanitize_dc_state(dev_priv);
1847                 bxt_disable_dc9(dev_priv);
1848         } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
1849                 hsw_disable_pc8(dev_priv);
1850         }
1851
1852         intel_uncore_sanitize(dev_priv);
1853
1854         if (dev_priv->power_domains_suspended)
1855                 intel_power_domains_init_hw(dev_priv, true);
1856         else
1857                 intel_display_set_init_power(dev_priv, true);
1858
1859         intel_engines_sanitize(dev_priv);
1860
1861         enable_rpm_wakeref_asserts(dev_priv);
1862
1863 out:
1864         dev_priv->power_domains_suspended = false;
1865
1866         return ret;
1867 }
1868
1869 static int i915_resume_switcheroo(struct drm_device *dev)
1870 {
1871         int ret;
1872
1873         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
1874                 return 0;
1875
1876         ret = i915_drm_resume_early(dev);
1877         if (ret)
1878                 return ret;
1879
1880         return i915_drm_resume(dev);
1881 }
1882
1883 /**
1884  * i915_reset - reset chip after a hang
1885  * @i915: #drm_i915_private to reset
1886  * @stalled_mask: mask of the stalled engines with the guilty requests
1887  * @reason: user error message for why we are resetting
1888  *
1889  * Reset the chip.  Useful if a hang is detected. Marks the device as wedged
1890  * on failure.
1891  *
1892  * Caller must hold the struct_mutex.
1893  *
1894  * Procedure is fairly simple:
1895  *   - reset the chip using the reset reg
1896  *   - re-init context state
1897  *   - re-init hardware status page
1898  *   - re-init ring buffer
1899  *   - re-init interrupt state
1900  *   - re-init display
1901  */
1902 void i915_reset(struct drm_i915_private *i915,
1903                 unsigned int stalled_mask,
1904                 const char *reason)
1905 {
1906         struct i915_gpu_error *error = &i915->gpu_error;
1907         int ret;
1908         int i;
1909
1910         GEM_TRACE("flags=%lx\n", error->flags);
1911
1912         might_sleep();
1913         lockdep_assert_held(&i915->drm.struct_mutex);
1914         GEM_BUG_ON(!test_bit(I915_RESET_BACKOFF, &error->flags));
1915
1916         if (!test_bit(I915_RESET_HANDOFF, &error->flags))
1917                 return;
1918
1919         /* Clear any previous failed attempts at recovery. Time to try again. */
1920         if (!i915_gem_unset_wedged(i915))
1921                 goto wakeup;
1922
1923         if (reason)
1924                 dev_notice(i915->drm.dev, "Resetting chip for %s\n", reason);
1925         error->reset_count++;
1926
1927         disable_irq(i915->drm.irq);
1928         ret = i915_gem_reset_prepare(i915);
1929         if (ret) {
1930                 dev_err(i915->drm.dev, "GPU recovery failed\n");
1931                 goto taint;
1932         }
1933
1934         if (!intel_has_gpu_reset(i915)) {
1935                 if (i915_modparams.reset)
1936                         dev_err(i915->drm.dev, "GPU reset not supported\n");
1937                 else
1938                         DRM_DEBUG_DRIVER("GPU reset disabled\n");
1939                 goto error;
1940         }
1941
1942         for (i = 0; i < 3; i++) {
1943                 ret = intel_gpu_reset(i915, ALL_ENGINES);
1944                 if (ret == 0)
1945                         break;
1946
1947                 msleep(100);
1948         }
1949         if (ret) {
1950                 dev_err(i915->drm.dev, "Failed to reset chip\n");
1951                 goto taint;
1952         }
1953
1954         /* Ok, now get things going again... */
1955
1956         /*
1957          * Everything depends on having the GTT running, so we need to start
1958          * there.
1959          */
1960         ret = i915_ggtt_enable_hw(i915);
1961         if (ret) {
1962                 DRM_ERROR("Failed to re-enable GGTT following reset (%d)\n",
1963                           ret);
1964                 goto error;
1965         }
1966
1967         i915_gem_reset(i915, stalled_mask);
1968         intel_overlay_reset(i915);
1969
1970         /*
1971          * Next we need to restore the context, but we don't use those
1972          * yet either...
1973          *
1974          * Ring buffer needs to be re-initialized in the KMS case, or if X
1975          * was running at the time of the reset (i.e. we weren't VT
1976          * switched away).
1977          */
1978         ret = i915_gem_init_hw(i915);
1979         if (ret) {
1980                 DRM_ERROR("Failed to initialise HW following reset (%d)\n",
1981                           ret);
1982                 goto error;
1983         }
1984
1985         i915_queue_hangcheck(i915);
1986
1987 finish:
1988         i915_gem_reset_finish(i915);
1989         enable_irq(i915->drm.irq);
1990
1991 wakeup:
1992         clear_bit(I915_RESET_HANDOFF, &error->flags);
1993         wake_up_bit(&error->flags, I915_RESET_HANDOFF);
1994         return;
1995
1996 taint:
1997         /*
1998          * History tells us that if we cannot reset the GPU now, we
1999          * never will. This then impacts everything that is run
2000          * subsequently. On failing the reset, we mark the driver
2001          * as wedged, preventing further execution on the GPU.
2002          * We also want to go one step further and add a taint to the
2003          * kernel so that any subsequent faults can be traced back to
2004          * this failure. This is important for CI, where if the
2005          * GPU/driver fails we would like to reboot and restart testing
2006          * rather than continue on into oblivion. For everyone else,
2007          * the system should still plod along, but they have been warned!
2008          */
2009         add_taint(TAINT_WARN, LOCKDEP_STILL_OK);
2010 error:
2011         i915_gem_set_wedged(i915);
2012         i915_retire_requests(i915);
2013         goto finish;
2014 }
2015
2016 static inline int intel_gt_reset_engine(struct drm_i915_private *dev_priv,
2017                                         struct intel_engine_cs *engine)
2018 {
2019         return intel_gpu_reset(dev_priv, intel_engine_flag(engine));
2020 }
2021
2022 /**
2023  * i915_reset_engine - reset GPU engine to recover from a hang
2024  * @engine: engine to reset
2025  * @msg: reason for GPU reset; or NULL for no dev_notice()
2026  *
2027  * Reset a specific GPU engine. Useful if a hang is detected.
2028  * Returns zero on successful reset or otherwise an error code.
2029  *
2030  * Procedure is:
2031  *  - identifies the request that caused the hang and it is dropped
2032  *  - reset engine (which will force the engine to idle)
2033  *  - re-init/configure engine
2034  */
2035 int i915_reset_engine(struct intel_engine_cs *engine, const char *msg)
2036 {
2037         struct i915_gpu_error *error = &engine->i915->gpu_error;
2038         struct i915_request *active_request;
2039         int ret;
2040
2041         GEM_TRACE("%s flags=%lx\n", engine->name, error->flags);
2042         GEM_BUG_ON(!test_bit(I915_RESET_ENGINE + engine->id, &error->flags));
2043
2044         active_request = i915_gem_reset_prepare_engine(engine);
2045         if (IS_ERR_OR_NULL(active_request)) {
2046                 /* Either the previous reset failed, or we pardon the reset. */
2047                 ret = PTR_ERR(active_request);
2048                 goto out;
2049         }
2050
2051         if (msg)
2052                 dev_notice(engine->i915->drm.dev,
2053                            "Resetting %s for %s\n", engine->name, msg);
2054         error->reset_engine_count[engine->id]++;
2055
2056         if (!engine->i915->guc.execbuf_client)
2057                 ret = intel_gt_reset_engine(engine->i915, engine);
2058         else
2059                 ret = intel_guc_reset_engine(&engine->i915->guc, engine);
2060         if (ret) {
2061                 /* If we fail here, we expect to fallback to a global reset */
2062                 DRM_DEBUG_DRIVER("%sFailed to reset %s, ret=%d\n",
2063                                  engine->i915->guc.execbuf_client ? "GuC " : "",
2064                                  engine->name, ret);
2065                 goto out;
2066         }
2067
2068         /*
2069          * The request that caused the hang is stuck on elsp, we know the
2070          * active request and can drop it, adjust head to skip the offending
2071          * request to resume executing remaining requests in the queue.
2072          */
2073         i915_gem_reset_engine(engine, active_request, true);
2074
2075         /*
2076          * The engine and its registers (and workarounds in case of render)
2077          * have been reset to their default values. Follow the init_ring
2078          * process to program RING_MODE, HWSP and re-enable submission.
2079          */
2080         ret = engine->init_hw(engine);
2081         if (ret)
2082                 goto out;
2083
2084 out:
2085         i915_gem_reset_finish_engine(engine);
2086         return ret;
2087 }
2088
2089 static int i915_pm_prepare(struct device *kdev)
2090 {
2091         struct pci_dev *pdev = to_pci_dev(kdev);
2092         struct drm_device *dev = pci_get_drvdata(pdev);
2093
2094         if (!dev) {
2095                 dev_err(kdev, "DRM not initialized, aborting suspend.\n");
2096                 return -ENODEV;
2097         }
2098
2099         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2100                 return 0;
2101
2102         return i915_drm_prepare(dev);
2103 }
2104
2105 static int i915_pm_suspend(struct device *kdev)
2106 {
2107         struct pci_dev *pdev = to_pci_dev(kdev);
2108         struct drm_device *dev = pci_get_drvdata(pdev);
2109
2110         if (!dev) {
2111                 dev_err(kdev, "DRM not initialized, aborting suspend.\n");
2112                 return -ENODEV;
2113         }
2114
2115         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2116                 return 0;
2117
2118         return i915_drm_suspend(dev);
2119 }
2120
2121 static int i915_pm_suspend_late(struct device *kdev)
2122 {
2123         struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2124
2125         /*
2126          * We have a suspend ordering issue with the snd-hda driver also
2127          * requiring our device to be power up. Due to the lack of a
2128          * parent/child relationship we currently solve this with an late
2129          * suspend hook.
2130          *
2131          * FIXME: This should be solved with a special hdmi sink device or
2132          * similar so that power domains can be employed.
2133          */
2134         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2135                 return 0;
2136
2137         return i915_drm_suspend_late(dev, false);
2138 }
2139
2140 static int i915_pm_poweroff_late(struct device *kdev)
2141 {
2142         struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2143
2144         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2145                 return 0;
2146
2147         return i915_drm_suspend_late(dev, true);
2148 }
2149
2150 static int i915_pm_resume_early(struct device *kdev)
2151 {
2152         struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2153
2154         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2155                 return 0;
2156
2157         return i915_drm_resume_early(dev);
2158 }
2159
2160 static int i915_pm_resume(struct device *kdev)
2161 {
2162         struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2163
2164         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
2165                 return 0;
2166
2167         return i915_drm_resume(dev);
2168 }
2169
2170 /* freeze: before creating the hibernation_image */
2171 static int i915_pm_freeze(struct device *kdev)
2172 {
2173         struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2174         int ret;
2175
2176         if (dev->switch_power_state != DRM_SWITCH_POWER_OFF) {
2177                 ret = i915_drm_suspend(dev);
2178                 if (ret)
2179                         return ret;
2180         }
2181
2182         ret = i915_gem_freeze(kdev_to_i915(kdev));
2183         if (ret)
2184                 return ret;
2185
2186         return 0;
2187 }
2188
2189 static int i915_pm_freeze_late(struct device *kdev)
2190 {
2191         struct drm_device *dev = &kdev_to_i915(kdev)->drm;
2192         int ret;
2193
2194         if (dev->switch_power_state != DRM_SWITCH_POWER_OFF) {
2195                 ret = i915_drm_suspend_late(dev, true);
2196                 if (ret)
2197                         return ret;
2198         }
2199
2200         ret = i915_gem_freeze_late(kdev_to_i915(kdev));
2201         if (ret)
2202                 return ret;
2203
2204         return 0;
2205 }
2206
2207 /* thaw: called after creating the hibernation image, but before turning off. */
2208 static int i915_pm_thaw_early(struct device *kdev)
2209 {
2210         return i915_pm_resume_early(kdev);
2211 }
2212
2213 static int i915_pm_thaw(struct device *kdev)
2214 {
2215         return i915_pm_resume(kdev);
2216 }
2217
2218 /* restore: called after loading the hibernation image. */
2219 static int i915_pm_restore_early(struct device *kdev)
2220 {
2221         return i915_pm_resume_early(kdev);
2222 }
2223
2224 static int i915_pm_restore(struct device *kdev)
2225 {
2226         return i915_pm_resume(kdev);
2227 }
2228
2229 /*
2230  * Save all Gunit registers that may be lost after a D3 and a subsequent
2231  * S0i[R123] transition. The list of registers needing a save/restore is
2232  * defined in the VLV2_S0IXRegs document. This documents marks all Gunit
2233  * registers in the following way:
2234  * - Driver: saved/restored by the driver
2235  * - Punit : saved/restored by the Punit firmware
2236  * - No, w/o marking: no need to save/restore, since the register is R/O or
2237  *                    used internally by the HW in a way that doesn't depend
2238  *                    keeping the content across a suspend/resume.
2239  * - Debug : used for debugging
2240  *
2241  * We save/restore all registers marked with 'Driver', with the following
2242  * exceptions:
2243  * - Registers out of use, including also registers marked with 'Debug'.
2244  *   These have no effect on the driver's operation, so we don't save/restore
2245  *   them to reduce the overhead.
2246  * - Registers that are fully setup by an initialization function called from
2247  *   the resume path. For example many clock gating and RPS/RC6 registers.
2248  * - Registers that provide the right functionality with their reset defaults.
2249  *
2250  * TODO: Except for registers that based on the above 3 criteria can be safely
2251  * ignored, we save/restore all others, practically treating the HW context as
2252  * a black-box for the driver. Further investigation is needed to reduce the
2253  * saved/restored registers even further, by following the same 3 criteria.
2254  */
2255 static void vlv_save_gunit_s0ix_state(struct drm_i915_private *dev_priv)
2256 {
2257         struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
2258         int i;
2259
2260         /* GAM 0x4000-0x4770 */
2261         s->wr_watermark         = I915_READ(GEN7_WR_WATERMARK);
2262         s->gfx_prio_ctrl        = I915_READ(GEN7_GFX_PRIO_CTRL);
2263         s->arb_mode             = I915_READ(ARB_MODE);
2264         s->gfx_pend_tlb0        = I915_READ(GEN7_GFX_PEND_TLB0);
2265         s->gfx_pend_tlb1        = I915_READ(GEN7_GFX_PEND_TLB1);
2266
2267         for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
2268                 s->lra_limits[i] = I915_READ(GEN7_LRA_LIMITS(i));
2269
2270         s->media_max_req_count  = I915_READ(GEN7_MEDIA_MAX_REQ_COUNT);
2271         s->gfx_max_req_count    = I915_READ(GEN7_GFX_MAX_REQ_COUNT);
2272
2273         s->render_hwsp          = I915_READ(RENDER_HWS_PGA_GEN7);
2274         s->ecochk               = I915_READ(GAM_ECOCHK);
2275         s->bsd_hwsp             = I915_READ(BSD_HWS_PGA_GEN7);
2276         s->blt_hwsp             = I915_READ(BLT_HWS_PGA_GEN7);
2277
2278         s->tlb_rd_addr          = I915_READ(GEN7_TLB_RD_ADDR);
2279
2280         /* MBC 0x9024-0x91D0, 0x8500 */
2281         s->g3dctl               = I915_READ(VLV_G3DCTL);
2282         s->gsckgctl             = I915_READ(VLV_GSCKGCTL);
2283         s->mbctl                = I915_READ(GEN6_MBCTL);
2284
2285         /* GCP 0x9400-0x9424, 0x8100-0x810C */
2286         s->ucgctl1              = I915_READ(GEN6_UCGCTL1);
2287         s->ucgctl3              = I915_READ(GEN6_UCGCTL3);
2288         s->rcgctl1              = I915_READ(GEN6_RCGCTL1);
2289         s->rcgctl2              = I915_READ(GEN6_RCGCTL2);
2290         s->rstctl               = I915_READ(GEN6_RSTCTL);
2291         s->misccpctl            = I915_READ(GEN7_MISCCPCTL);
2292
2293         /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
2294         s->gfxpause             = I915_READ(GEN6_GFXPAUSE);
2295         s->rpdeuhwtc            = I915_READ(GEN6_RPDEUHWTC);
2296         s->rpdeuc               = I915_READ(GEN6_RPDEUC);
2297         s->ecobus               = I915_READ(ECOBUS);
2298         s->pwrdwnupctl          = I915_READ(VLV_PWRDWNUPCTL);
2299         s->rp_down_timeout      = I915_READ(GEN6_RP_DOWN_TIMEOUT);
2300         s->rp_deucsw            = I915_READ(GEN6_RPDEUCSW);
2301         s->rcubmabdtmr          = I915_READ(GEN6_RCUBMABDTMR);
2302         s->rcedata              = I915_READ(VLV_RCEDATA);
2303         s->spare2gh             = I915_READ(VLV_SPAREG2H);
2304
2305         /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
2306         s->gt_imr               = I915_READ(GTIMR);
2307         s->gt_ier               = I915_READ(GTIER);
2308         s->pm_imr               = I915_READ(GEN6_PMIMR);
2309         s->pm_ier               = I915_READ(GEN6_PMIER);
2310
2311         for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
2312                 s->gt_scratch[i] = I915_READ(GEN7_GT_SCRATCH(i));
2313
2314         /* GT SA CZ domain, 0x100000-0x138124 */
2315         s->tilectl              = I915_READ(TILECTL);
2316         s->gt_fifoctl           = I915_READ(GTFIFOCTL);
2317         s->gtlc_wake_ctrl       = I915_READ(VLV_GTLC_WAKE_CTRL);
2318         s->gtlc_survive         = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
2319         s->pmwgicz              = I915_READ(VLV_PMWGICZ);
2320
2321         /* Gunit-Display CZ domain, 0x182028-0x1821CF */
2322         s->gu_ctl0              = I915_READ(VLV_GU_CTL0);
2323         s->gu_ctl1              = I915_READ(VLV_GU_CTL1);
2324         s->pcbr                 = I915_READ(VLV_PCBR);
2325         s->clock_gate_dis2      = I915_READ(VLV_GUNIT_CLOCK_GATE2);
2326
2327         /*
2328          * Not saving any of:
2329          * DFT,         0x9800-0x9EC0
2330          * SARB,        0xB000-0xB1FC
2331          * GAC,         0x5208-0x524C, 0x14000-0x14C000
2332          * PCI CFG
2333          */
2334 }
2335
2336 static void vlv_restore_gunit_s0ix_state(struct drm_i915_private *dev_priv)
2337 {
2338         struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
2339         u32 val;
2340         int i;
2341
2342         /* GAM 0x4000-0x4770 */
2343         I915_WRITE(GEN7_WR_WATERMARK,   s->wr_watermark);
2344         I915_WRITE(GEN7_GFX_PRIO_CTRL,  s->gfx_prio_ctrl);
2345         I915_WRITE(ARB_MODE,            s->arb_mode | (0xffff << 16));
2346         I915_WRITE(GEN7_GFX_PEND_TLB0,  s->gfx_pend_tlb0);
2347         I915_WRITE(GEN7_GFX_PEND_TLB1,  s->gfx_pend_tlb1);
2348
2349         for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
2350                 I915_WRITE(GEN7_LRA_LIMITS(i), s->lra_limits[i]);
2351
2352         I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT, s->media_max_req_count);
2353         I915_WRITE(GEN7_GFX_MAX_REQ_COUNT, s->gfx_max_req_count);
2354
2355         I915_WRITE(RENDER_HWS_PGA_GEN7, s->render_hwsp);
2356         I915_WRITE(GAM_ECOCHK,          s->ecochk);
2357         I915_WRITE(BSD_HWS_PGA_GEN7,    s->bsd_hwsp);
2358         I915_WRITE(BLT_HWS_PGA_GEN7,    s->blt_hwsp);
2359
2360         I915_WRITE(GEN7_TLB_RD_ADDR,    s->tlb_rd_addr);
2361
2362         /* MBC 0x9024-0x91D0, 0x8500 */
2363         I915_WRITE(VLV_G3DCTL,          s->g3dctl);
2364         I915_WRITE(VLV_GSCKGCTL,        s->gsckgctl);
2365         I915_WRITE(GEN6_MBCTL,          s->mbctl);
2366
2367         /* GCP 0x9400-0x9424, 0x8100-0x810C */
2368         I915_WRITE(GEN6_UCGCTL1,        s->ucgctl1);
2369         I915_WRITE(GEN6_UCGCTL3,        s->ucgctl3);
2370         I915_WRITE(GEN6_RCGCTL1,        s->rcgctl1);
2371         I915_WRITE(GEN6_RCGCTL2,        s->rcgctl2);
2372         I915_WRITE(GEN6_RSTCTL,         s->rstctl);
2373         I915_WRITE(GEN7_MISCCPCTL,      s->misccpctl);
2374
2375         /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
2376         I915_WRITE(GEN6_GFXPAUSE,       s->gfxpause);
2377         I915_WRITE(GEN6_RPDEUHWTC,      s->rpdeuhwtc);
2378         I915_WRITE(GEN6_RPDEUC,         s->rpdeuc);
2379         I915_WRITE(ECOBUS,              s->ecobus);
2380         I915_WRITE(VLV_PWRDWNUPCTL,     s->pwrdwnupctl);
2381         I915_WRITE(GEN6_RP_DOWN_TIMEOUT,s->rp_down_timeout);
2382         I915_WRITE(GEN6_RPDEUCSW,       s->rp_deucsw);
2383         I915_WRITE(GEN6_RCUBMABDTMR,    s->rcubmabdtmr);
2384         I915_WRITE(VLV_RCEDATA,         s->rcedata);
2385         I915_WRITE(VLV_SPAREG2H,        s->spare2gh);
2386
2387         /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
2388         I915_WRITE(GTIMR,               s->gt_imr);
2389         I915_WRITE(GTIER,               s->gt_ier);
2390         I915_WRITE(GEN6_PMIMR,          s->pm_imr);
2391         I915_WRITE(GEN6_PMIER,          s->pm_ier);
2392
2393         for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
2394                 I915_WRITE(GEN7_GT_SCRATCH(i), s->gt_scratch[i]);
2395
2396         /* GT SA CZ domain, 0x100000-0x138124 */
2397         I915_WRITE(TILECTL,                     s->tilectl);
2398         I915_WRITE(GTFIFOCTL,                   s->gt_fifoctl);
2399         /*
2400          * Preserve the GT allow wake and GFX force clock bit, they are not
2401          * be restored, as they are used to control the s0ix suspend/resume
2402          * sequence by the caller.
2403          */
2404         val = I915_READ(VLV_GTLC_WAKE_CTRL);
2405         val &= VLV_GTLC_ALLOWWAKEREQ;
2406         val |= s->gtlc_wake_ctrl & ~VLV_GTLC_ALLOWWAKEREQ;
2407         I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
2408
2409         val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
2410         val &= VLV_GFX_CLK_FORCE_ON_BIT;
2411         val |= s->gtlc_survive & ~VLV_GFX_CLK_FORCE_ON_BIT;
2412         I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
2413
2414         I915_WRITE(VLV_PMWGICZ,                 s->pmwgicz);
2415
2416         /* Gunit-Display CZ domain, 0x182028-0x1821CF */
2417         I915_WRITE(VLV_GU_CTL0,                 s->gu_ctl0);
2418         I915_WRITE(VLV_GU_CTL1,                 s->gu_ctl1);
2419         I915_WRITE(VLV_PCBR,                    s->pcbr);
2420         I915_WRITE(VLV_GUNIT_CLOCK_GATE2,       s->clock_gate_dis2);
2421 }
2422
2423 static int vlv_wait_for_pw_status(struct drm_i915_private *dev_priv,
2424                                   u32 mask, u32 val)
2425 {
2426         /* The HW does not like us polling for PW_STATUS frequently, so
2427          * use the sleeping loop rather than risk the busy spin within
2428          * intel_wait_for_register().
2429          *
2430          * Transitioning between RC6 states should be at most 2ms (see
2431          * valleyview_enable_rps) so use a 3ms timeout.
2432          */
2433         return wait_for((I915_READ_NOTRACE(VLV_GTLC_PW_STATUS) & mask) == val,
2434                         3);
2435 }
2436
2437 int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on)
2438 {
2439         u32 val;
2440         int err;
2441
2442         val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
2443         val &= ~VLV_GFX_CLK_FORCE_ON_BIT;
2444         if (force_on)
2445                 val |= VLV_GFX_CLK_FORCE_ON_BIT;
2446         I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
2447
2448         if (!force_on)
2449                 return 0;
2450
2451         err = intel_wait_for_register(dev_priv,
2452                                       VLV_GTLC_SURVIVABILITY_REG,
2453                                       VLV_GFX_CLK_STATUS_BIT,
2454                                       VLV_GFX_CLK_STATUS_BIT,
2455                                       20);
2456         if (err)
2457                 DRM_ERROR("timeout waiting for GFX clock force-on (%08x)\n",
2458                           I915_READ(VLV_GTLC_SURVIVABILITY_REG));
2459
2460         return err;
2461 }
2462
2463 static int vlv_allow_gt_wake(struct drm_i915_private *dev_priv, bool allow)
2464 {
2465         u32 mask;
2466         u32 val;
2467         int err;
2468
2469         val = I915_READ(VLV_GTLC_WAKE_CTRL);
2470         val &= ~VLV_GTLC_ALLOWWAKEREQ;
2471         if (allow)
2472                 val |= VLV_GTLC_ALLOWWAKEREQ;
2473         I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
2474         POSTING_READ(VLV_GTLC_WAKE_CTRL);
2475
2476         mask = VLV_GTLC_ALLOWWAKEACK;
2477         val = allow ? mask : 0;
2478
2479         err = vlv_wait_for_pw_status(dev_priv, mask, val);
2480         if (err)
2481                 DRM_ERROR("timeout disabling GT waking\n");
2482
2483         return err;
2484 }
2485
2486 static void vlv_wait_for_gt_wells(struct drm_i915_private *dev_priv,
2487                                   bool wait_for_on)
2488 {
2489         u32 mask;
2490         u32 val;
2491
2492         mask = VLV_GTLC_PW_MEDIA_STATUS_MASK | VLV_GTLC_PW_RENDER_STATUS_MASK;
2493         val = wait_for_on ? mask : 0;
2494
2495         /*
2496          * RC6 transitioning can be delayed up to 2 msec (see
2497          * valleyview_enable_rps), use 3 msec for safety.
2498          *
2499          * This can fail to turn off the rc6 if the GPU is stuck after a failed
2500          * reset and we are trying to force the machine to sleep.
2501          */
2502         if (vlv_wait_for_pw_status(dev_priv, mask, val))
2503                 DRM_DEBUG_DRIVER("timeout waiting for GT wells to go %s\n",
2504                                  onoff(wait_for_on));
2505 }
2506
2507 static void vlv_check_no_gt_access(struct drm_i915_private *dev_priv)
2508 {
2509         if (!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEERR))
2510                 return;
2511
2512         DRM_DEBUG_DRIVER("GT register access while GT waking disabled\n");
2513         I915_WRITE(VLV_GTLC_PW_STATUS, VLV_GTLC_ALLOWWAKEERR);
2514 }
2515
2516 static int vlv_suspend_complete(struct drm_i915_private *dev_priv)
2517 {
2518         u32 mask;
2519         int err;
2520
2521         /*
2522          * Bspec defines the following GT well on flags as debug only, so
2523          * don't treat them as hard failures.
2524          */
2525         vlv_wait_for_gt_wells(dev_priv, false);
2526
2527         mask = VLV_GTLC_RENDER_CTX_EXISTS | VLV_GTLC_MEDIA_CTX_EXISTS;
2528         WARN_ON((I915_READ(VLV_GTLC_WAKE_CTRL) & mask) != mask);
2529
2530         vlv_check_no_gt_access(dev_priv);
2531
2532         err = vlv_force_gfx_clock(dev_priv, true);
2533         if (err)
2534                 goto err1;
2535
2536         err = vlv_allow_gt_wake(dev_priv, false);
2537         if (err)
2538                 goto err2;
2539
2540         if (!IS_CHERRYVIEW(dev_priv))
2541                 vlv_save_gunit_s0ix_state(dev_priv);
2542
2543         err = vlv_force_gfx_clock(dev_priv, false);
2544         if (err)
2545                 goto err2;
2546
2547         return 0;
2548
2549 err2:
2550         /* For safety always re-enable waking and disable gfx clock forcing */
2551         vlv_allow_gt_wake(dev_priv, true);
2552 err1:
2553         vlv_force_gfx_clock(dev_priv, false);
2554
2555         return err;
2556 }
2557
2558 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
2559                                 bool rpm_resume)
2560 {
2561         int err;
2562         int ret;
2563
2564         /*
2565          * If any of the steps fail just try to continue, that's the best we
2566          * can do at this point. Return the first error code (which will also
2567          * leave RPM permanently disabled).
2568          */
2569         ret = vlv_force_gfx_clock(dev_priv, true);
2570
2571         if (!IS_CHERRYVIEW(dev_priv))
2572                 vlv_restore_gunit_s0ix_state(dev_priv);
2573
2574         err = vlv_allow_gt_wake(dev_priv, true);
2575         if (!ret)
2576                 ret = err;
2577
2578         err = vlv_force_gfx_clock(dev_priv, false);
2579         if (!ret)
2580                 ret = err;
2581
2582         vlv_check_no_gt_access(dev_priv);
2583
2584         if (rpm_resume)
2585                 intel_init_clock_gating(dev_priv);
2586
2587         return ret;
2588 }
2589
2590 static int intel_runtime_suspend(struct device *kdev)
2591 {
2592         struct pci_dev *pdev = to_pci_dev(kdev);
2593         struct drm_device *dev = pci_get_drvdata(pdev);
2594         struct drm_i915_private *dev_priv = to_i915(dev);
2595         int ret;
2596
2597         if (WARN_ON_ONCE(!(dev_priv->gt_pm.rc6.enabled && HAS_RC6(dev_priv))))
2598                 return -ENODEV;
2599
2600         if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev_priv)))
2601                 return -ENODEV;
2602
2603         DRM_DEBUG_KMS("Suspending device\n");
2604
2605         disable_rpm_wakeref_asserts(dev_priv);
2606
2607         /*
2608          * We are safe here against re-faults, since the fault handler takes
2609          * an RPM reference.
2610          */
2611         i915_gem_runtime_suspend(dev_priv);
2612
2613         intel_uc_suspend(dev_priv);
2614
2615         intel_runtime_pm_disable_interrupts(dev_priv);
2616
2617         intel_uncore_suspend(dev_priv);
2618
2619         ret = 0;
2620         if (IS_GEN9_LP(dev_priv)) {
2621                 bxt_display_core_uninit(dev_priv);
2622                 bxt_enable_dc9(dev_priv);
2623         } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
2624                 hsw_enable_pc8(dev_priv);
2625         } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
2626                 ret = vlv_suspend_complete(dev_priv);
2627         }
2628
2629         if (ret) {
2630                 DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
2631                 intel_uncore_runtime_resume(dev_priv);
2632
2633                 intel_runtime_pm_enable_interrupts(dev_priv);
2634
2635                 intel_uc_resume(dev_priv);
2636
2637                 i915_gem_init_swizzling(dev_priv);
2638                 i915_gem_restore_fences(dev_priv);
2639
2640                 enable_rpm_wakeref_asserts(dev_priv);
2641
2642                 return ret;
2643         }
2644
2645         enable_rpm_wakeref_asserts(dev_priv);
2646         WARN_ON_ONCE(atomic_read(&dev_priv->runtime_pm.wakeref_count));
2647
2648         if (intel_uncore_arm_unclaimed_mmio_detection(dev_priv))
2649                 DRM_ERROR("Unclaimed access detected prior to suspending\n");
2650
2651         dev_priv->runtime_pm.suspended = true;
2652
2653         /*
2654          * FIXME: We really should find a document that references the arguments
2655          * used below!
2656          */
2657         if (IS_BROADWELL(dev_priv)) {
2658                 /*
2659                  * On Broadwell, if we use PCI_D1 the PCH DDI ports will stop
2660                  * being detected, and the call we do at intel_runtime_resume()
2661                  * won't be able to restore them. Since PCI_D3hot matches the
2662                  * actual specification and appears to be working, use it.
2663                  */
2664                 intel_opregion_notify_adapter(dev_priv, PCI_D3hot);
2665         } else {
2666                 /*
2667                  * current versions of firmware which depend on this opregion
2668                  * notification have repurposed the D1 definition to mean
2669                  * "runtime suspended" vs. what you would normally expect (D3)
2670                  * to distinguish it from notifications that might be sent via
2671                  * the suspend path.
2672                  */
2673                 intel_opregion_notify_adapter(dev_priv, PCI_D1);
2674         }
2675
2676         assert_forcewakes_inactive(dev_priv);
2677
2678         if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
2679                 intel_hpd_poll_init(dev_priv);
2680
2681         DRM_DEBUG_KMS("Device suspended\n");
2682         return 0;
2683 }
2684
2685 static int intel_runtime_resume(struct device *kdev)
2686 {
2687         struct pci_dev *pdev = to_pci_dev(kdev);
2688         struct drm_device *dev = pci_get_drvdata(pdev);
2689         struct drm_i915_private *dev_priv = to_i915(dev);
2690         int ret = 0;
2691
2692         if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev_priv)))
2693                 return -ENODEV;
2694
2695         DRM_DEBUG_KMS("Resuming device\n");
2696
2697         WARN_ON_ONCE(atomic_read(&dev_priv->runtime_pm.wakeref_count));
2698         disable_rpm_wakeref_asserts(dev_priv);
2699
2700         intel_opregion_notify_adapter(dev_priv, PCI_D0);
2701         dev_priv->runtime_pm.suspended = false;
2702         if (intel_uncore_unclaimed_mmio(dev_priv))
2703                 DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n");
2704
2705         if (IS_GEN9_LP(dev_priv)) {
2706                 bxt_disable_dc9(dev_priv);
2707                 bxt_display_core_init(dev_priv, true);
2708                 if (dev_priv->csr.dmc_payload &&
2709                     (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5))
2710                         gen9_enable_dc5(dev_priv);
2711         } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
2712                 hsw_disable_pc8(dev_priv);
2713         } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
2714                 ret = vlv_resume_prepare(dev_priv, true);
2715         }
2716
2717         intel_uncore_runtime_resume(dev_priv);
2718
2719         intel_runtime_pm_enable_interrupts(dev_priv);
2720
2721         intel_uc_resume(dev_priv);
2722
2723         /*
2724          * No point of rolling back things in case of an error, as the best
2725          * we can do is to hope that things will still work (and disable RPM).
2726          */
2727         i915_gem_init_swizzling(dev_priv);
2728         i915_gem_restore_fences(dev_priv);
2729
2730         /*
2731          * On VLV/CHV display interrupts are part of the display
2732          * power well, so hpd is reinitialized from there. For
2733          * everyone else do it here.
2734          */
2735         if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
2736                 intel_hpd_init(dev_priv);
2737
2738         intel_enable_ipc(dev_priv);
2739
2740         enable_rpm_wakeref_asserts(dev_priv);
2741
2742         if (ret)
2743                 DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret);
2744         else
2745                 DRM_DEBUG_KMS("Device resumed\n");
2746
2747         return ret;
2748 }
2749
2750 const struct dev_pm_ops i915_pm_ops = {
2751         /*
2752          * S0ix (via system suspend) and S3 event handlers [PMSG_SUSPEND,
2753          * PMSG_RESUME]
2754          */
2755         .prepare = i915_pm_prepare,
2756         .suspend = i915_pm_suspend,
2757         .suspend_late = i915_pm_suspend_late,
2758         .resume_early = i915_pm_resume_early,
2759         .resume = i915_pm_resume,
2760
2761         /*
2762          * S4 event handlers
2763          * @freeze, @freeze_late    : called (1) before creating the
2764          *                            hibernation image [PMSG_FREEZE] and
2765          *                            (2) after rebooting, before restoring
2766          *                            the image [PMSG_QUIESCE]
2767          * @thaw, @thaw_early       : called (1) after creating the hibernation
2768          *                            image, before writing it [PMSG_THAW]
2769          *                            and (2) after failing to create or
2770          *                            restore the image [PMSG_RECOVER]
2771          * @poweroff, @poweroff_late: called after writing the hibernation
2772          *                            image, before rebooting [PMSG_HIBERNATE]
2773          * @restore, @restore_early : called after rebooting and restoring the
2774          *                            hibernation image [PMSG_RESTORE]
2775          */
2776         .freeze = i915_pm_freeze,
2777         .freeze_late = i915_pm_freeze_late,
2778         .thaw_early = i915_pm_thaw_early,
2779         .thaw = i915_pm_thaw,
2780         .poweroff = i915_pm_suspend,
2781         .poweroff_late = i915_pm_poweroff_late,
2782         .restore_early = i915_pm_restore_early,
2783         .restore = i915_pm_restore,
2784
2785         /* S0ix (via runtime suspend) event handlers */
2786         .runtime_suspend = intel_runtime_suspend,
2787         .runtime_resume = intel_runtime_resume,
2788 };
2789
2790 static const struct vm_operations_struct i915_gem_vm_ops = {
2791         .fault = i915_gem_fault,
2792         .open = drm_gem_vm_open,
2793         .close = drm_gem_vm_close,
2794 };
2795
2796 static const struct file_operations i915_driver_fops = {
2797         .owner = THIS_MODULE,
2798         .open = drm_open,
2799         .release = drm_release,
2800         .unlocked_ioctl = drm_ioctl,
2801         .mmap = drm_gem_mmap,
2802         .poll = drm_poll,
2803         .read = drm_read,
2804         .compat_ioctl = i915_compat_ioctl,
2805         .llseek = noop_llseek,
2806 };
2807
2808 static int
2809 i915_gem_reject_pin_ioctl(struct drm_device *dev, void *data,
2810                           struct drm_file *file)
2811 {
2812         return -ENODEV;
2813 }
2814
2815 static const struct drm_ioctl_desc i915_ioctls[] = {
2816         DRM_IOCTL_DEF_DRV(I915_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2817         DRM_IOCTL_DEF_DRV(I915_FLUSH, drm_noop, DRM_AUTH),
2818         DRM_IOCTL_DEF_DRV(I915_FLIP, drm_noop, DRM_AUTH),
2819         DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, drm_noop, DRM_AUTH),
2820         DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, drm_noop, DRM_AUTH),
2821         DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, drm_noop, DRM_AUTH),
2822         DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
2823         DRM_IOCTL_DEF_DRV(I915_SETPARAM, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2824         DRM_IOCTL_DEF_DRV(I915_ALLOC, drm_noop, DRM_AUTH),
2825         DRM_IOCTL_DEF_DRV(I915_FREE, drm_noop, DRM_AUTH),
2826         DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2827         DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, drm_noop, DRM_AUTH),
2828         DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP,  drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2829         DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE,  drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2830         DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE,  drm_noop, DRM_AUTH),
2831         DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, drm_noop, DRM_AUTH),
2832         DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2833         DRM_IOCTL_DEF_DRV(I915_GEM_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2834         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer_ioctl, DRM_AUTH),
2835         DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2_WR, i915_gem_execbuffer2_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
2836         DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
2837         DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
2838         DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
2839         DRM_IOCTL_DEF_DRV(I915_GEM_SET_CACHING, i915_gem_set_caching_ioctl, DRM_RENDER_ALLOW),
2840         DRM_IOCTL_DEF_DRV(I915_GEM_GET_CACHING, i915_gem_get_caching_ioctl, DRM_RENDER_ALLOW),
2841         DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
2842         DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2843         DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2844         DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_RENDER_ALLOW),
2845         DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_RENDER_ALLOW),
2846         DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_RENDER_ALLOW),
2847         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_RENDER_ALLOW),
2848         DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_RENDER_ALLOW),
2849         DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_RENDER_ALLOW),
2850         DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_RENDER_ALLOW),
2851         DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling_ioctl, DRM_RENDER_ALLOW),
2852         DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling_ioctl, DRM_RENDER_ALLOW),
2853         DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_RENDER_ALLOW),
2854         DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id_ioctl, 0),
2855         DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_RENDER_ALLOW),
2856         DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
2857         DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
2858         DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
2859         DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW),
2860         DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
2861         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE, i915_gem_context_create_ioctl, DRM_RENDER_ALLOW),
2862         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_RENDER_ALLOW),
2863         DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_RENDER_ALLOW),
2864         DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_gem_context_reset_stats_ioctl, DRM_RENDER_ALLOW),
2865         DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_RENDER_ALLOW),
2866         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_GETPARAM, i915_gem_context_getparam_ioctl, DRM_RENDER_ALLOW),
2867         DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_SETPARAM, i915_gem_context_setparam_ioctl, DRM_RENDER_ALLOW),
2868         DRM_IOCTL_DEF_DRV(I915_PERF_OPEN, i915_perf_open_ioctl, DRM_RENDER_ALLOW),
2869         DRM_IOCTL_DEF_DRV(I915_PERF_ADD_CONFIG, i915_perf_add_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
2870         DRM_IOCTL_DEF_DRV(I915_PERF_REMOVE_CONFIG, i915_perf_remove_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
2871         DRM_IOCTL_DEF_DRV(I915_QUERY, i915_query_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
2872 };
2873
2874 static struct drm_driver driver = {
2875         /* Don't use MTRRs here; the Xserver or userspace app should
2876          * deal with them for Intel hardware.
2877          */
2878         .driver_features =
2879             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |
2880             DRIVER_RENDER | DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_SYNCOBJ,
2881         .release = i915_driver_release,
2882         .open = i915_driver_open,
2883         .lastclose = i915_driver_lastclose,
2884         .postclose = i915_driver_postclose,
2885
2886         .gem_close_object = i915_gem_close_object,
2887         .gem_free_object_unlocked = i915_gem_free_object,
2888         .gem_vm_ops = &i915_gem_vm_ops,
2889
2890         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
2891         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
2892         .gem_prime_export = i915_gem_prime_export,
2893         .gem_prime_import = i915_gem_prime_import,
2894
2895         .dumb_create = i915_gem_dumb_create,
2896         .dumb_map_offset = i915_gem_mmap_gtt,
2897         .ioctls = i915_ioctls,
2898         .num_ioctls = ARRAY_SIZE(i915_ioctls),
2899         .fops = &i915_driver_fops,
2900         .name = DRIVER_NAME,
2901         .desc = DRIVER_DESC,
2902         .date = DRIVER_DATE,
2903         .major = DRIVER_MAJOR,
2904         .minor = DRIVER_MINOR,
2905         .patchlevel = DRIVER_PATCHLEVEL,
2906 };
2907
2908 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
2909 #include "selftests/mock_drm.c"
2910 #endif