sys/dev/drm/i915/intel_uncore.c

   1 /*
   2  * Copyright © 2013 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "i915_drv.h"
  25 #include "intel_drv.h"
  26 #include "i915_vgpu.h"
  27
  28 #define FORCEWAKE_ACK_TIMEOUT_MS 50
  29
  30 #define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32((dev_priv__), (reg__))
  31
  32 static const char * const forcewake_domain_names[] = {
  33         "render",
  34         "blitter",
  35         "media",
  36 };
  37
  38 const char *
  39 intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id)
  40 {
  41         BUILD_BUG_ON(ARRAY_SIZE(forcewake_domain_names) != FW_DOMAIN_ID_COUNT);
  42
  43         if (id >= 0 && id < FW_DOMAIN_ID_COUNT)
  44                 return forcewake_domain_names[id];
  45
  46         WARN_ON(id);
  47
  48         return "unknown";
  49 }
  50
  51 static inline void
  52 fw_domain_reset(const struct intel_uncore_forcewake_domain *d)
  53 {
  54         WARN_ON(!i915_mmio_reg_valid(d->reg_set));
  55         __raw_i915_write32(d->i915, d->reg_set, d->val_reset);
  56 }
  57
  58 static inline void
  59 fw_domain_arm_timer(struct intel_uncore_forcewake_domain *d)
  60 {
  61         d->wake_count++;
  62         hrtimer_start_range_ns(&d->timer,
  63                                ktime_set(0, NSEC_PER_MSEC),
  64                                NSEC_PER_MSEC,
  65                                HRTIMER_MODE_REL);
  66 }
  67
  68 static inline void
  69 fw_domain_wait_ack_clear(const struct intel_uncore_forcewake_domain *d)
  70 {
  71         if (wait_for_atomic((__raw_i915_read32(d->i915, d->reg_ack) &
  72                              FORCEWAKE_KERNEL) == 0,
  73                             FORCEWAKE_ACK_TIMEOUT_MS))
  74                 DRM_ERROR("%s: timed out waiting for forcewake ack to clear.\n",
  75                           intel_uncore_forcewake_domain_to_str(d->id));
  76 }
  77
  78 static inline void
  79 fw_domain_get(const struct intel_uncore_forcewake_domain *d)
  80 {
  81         __raw_i915_write32(d->i915, d->reg_set, d->val_set);
  82 }
  83
  84 static inline void
  85 fw_domain_wait_ack(const struct intel_uncore_forcewake_domain *d)
  86 {
  87         if (wait_for_atomic((__raw_i915_read32(d->i915, d->reg_ack) &
  88                              FORCEWAKE_KERNEL),
  89                             FORCEWAKE_ACK_TIMEOUT_MS))
  90                 DRM_ERROR("%s: timed out waiting for forcewake ack request.\n",
  91                           intel_uncore_forcewake_domain_to_str(d->id));
  92 }
  93
  94 static inline void
  95 fw_domain_put(const struct intel_uncore_forcewake_domain *d)
  96 {
  97         __raw_i915_write32(d->i915, d->reg_set, d->val_clear);
  98 }
  99
 100 static inline void
 101 fw_domain_posting_read(const struct intel_uncore_forcewake_domain *d)
 102 {
 103         /* something from same cacheline, but not from the set register */
 104         if (i915_mmio_reg_valid(d->reg_post))
 105                 __raw_posting_read(d->i915, d->reg_post);
 106 }
 107
 108 static void
 109 fw_domains_get(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains)
 110 {
 111         struct intel_uncore_forcewake_domain *d;
 112
 113         for_each_fw_domain_masked(d, fw_domains, dev_priv) {
 114                 fw_domain_wait_ack_clear(d);
 115                 fw_domain_get(d);
 116         }
 117
 118         for_each_fw_domain_masked(d, fw_domains, dev_priv)
 119                 fw_domain_wait_ack(d);
 120 }
 121
 122 static void
 123 fw_domains_put(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains)
 124 {
 125         struct intel_uncore_forcewake_domain *d;
 126
 127         for_each_fw_domain_masked(d, fw_domains, dev_priv) {
 128                 fw_domain_put(d);
 129                 fw_domain_posting_read(d);
 130         }
 131 }
 132
 133 static void
 134 fw_domains_posting_read(struct drm_i915_private *dev_priv)
 135 {
 136         struct intel_uncore_forcewake_domain *d;
 137
 138         /* No need to do for all, just do for first found */
 139         for_each_fw_domain(d, dev_priv) {
 140                 fw_domain_posting_read(d);
 141                 break;
 142         }
 143 }
 144
 145 static void
 146 fw_domains_reset(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains)
 147 {
 148         struct intel_uncore_forcewake_domain *d;
 149
 150         if (dev_priv->uncore.fw_domains == 0)
 151                 return;
 152
 153         for_each_fw_domain_masked(d, fw_domains, dev_priv)
 154                 fw_domain_reset(d);
 155
 156         fw_domains_posting_read(dev_priv);
 157 }
 158
 159 static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
 160 {
 161         /* w/a for a sporadic read returning 0 by waiting for the GT
 162          * thread to wake up.
 163          */
 164         if (wait_for_atomic_us((__raw_i915_read32(dev_priv, GEN6_GT_THREAD_STATUS_REG) &
 165                                 GEN6_GT_THREAD_STATUS_CORE_MASK) == 0, 500))
 166                 DRM_ERROR("GT thread status wait timed out\n");
 167 }
 168
 169 static void fw_domains_get_with_thread_status(struct drm_i915_private *dev_priv,
 170                                               enum forcewake_domains fw_domains)
 171 {
 172         fw_domains_get(dev_priv, fw_domains);
 173
 174         /* WaRsForcewakeWaitTC0:snb,ivb,hsw,bdw,vlv */
 175         __gen6_gt_wait_for_thread_c0(dev_priv);
 176 }
 177
 178 static void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
 179 {
 180         u32 gtfifodbg;
 181
 182         gtfifodbg = __raw_i915_read32(dev_priv, GTFIFODBG);
 183         if (WARN(gtfifodbg, "GT wake FIFO error 0x%x\n", gtfifodbg))
 184                 __raw_i915_write32(dev_priv, GTFIFODBG, gtfifodbg);
 185 }
 186
 187 static void fw_domains_put_with_fifo(struct drm_i915_private *dev_priv,
 188                                      enum forcewake_domains fw_domains)
 189 {
 190         fw_domains_put(dev_priv, fw_domains);
 191         gen6_gt_check_fifodbg(dev_priv);
 192 }
 193
 194 static inline u32 fifo_free_entries(struct drm_i915_private *dev_priv)
 195 {
 196         u32 count = __raw_i915_read32(dev_priv, GTFIFOCTL);
 197
 198         return count & GT_FIFO_FREE_ENTRIES_MASK;
 199 }
 200
 201 static int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
 202 {
 203         int ret = 0;
 204
 205         /* On VLV, FIFO will be shared by both SW and HW.
 206          * So, we need to read the FREE_ENTRIES everytime */
 207         if (IS_VALLEYVIEW(dev_priv))
 208                 dev_priv->uncore.fifo_count = fifo_free_entries(dev_priv);
 209
 210         if (dev_priv->uncore.fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {
 211                 int loop = 500;
 212                 u32 fifo = fifo_free_entries(dev_priv);
 213
 214                 while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
 215                         udelay(10);
 216                         fifo = fifo_free_entries(dev_priv);
 217                 }
 218                 if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES))
 219                         ++ret;
 220                 dev_priv->uncore.fifo_count = fifo;
 221         }
 222         dev_priv->uncore.fifo_count--;
 223
 224         return ret;
 225 }
 226
 227 static enum hrtimer_restart
 228 intel_uncore_fw_release_timer(struct hrtimer *timer)
 229 {
 230         struct intel_uncore_forcewake_domain *domain =
 231                container_of(timer, struct intel_uncore_forcewake_domain, timer);
 232         unsigned long irqflags;
 233
 234         assert_rpm_device_not_suspended(domain->i915);
 235
 236         spin_lock_irqsave(&domain->i915->uncore.lock, irqflags);
 237         if (WARN_ON(domain->wake_count == 0))
 238                 domain->wake_count++;
 239
 240         if (--domain->wake_count == 0)
 241                 domain->i915->uncore.funcs.force_wake_put(domain->i915,
 242                                                           1 << domain->id);
 243
 244         spin_unlock_irqrestore(&domain->i915->uncore.lock, irqflags);
 245
 246         return HRTIMER_NORESTART;
 247 }
 248
 249 void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
 250 {
 251         struct drm_i915_private *dev_priv = dev->dev_private;
 252         unsigned long irqflags;
 253         struct intel_uncore_forcewake_domain *domain;
 254         int retry_count = 100;
 255         enum forcewake_domains fw = 0, active_domains;
 256
 257         /* Hold uncore.lock across reset to prevent any register access
 258          * with forcewake not set correctly. Wait until all pending
 259          * timers are run before holding.
 260          */
 261         while (1) {
 262                 active_domains = 0;
 263
 264                 for_each_fw_domain(domain, dev_priv) {
 265                         if (hrtimer_cancel(&domain->timer) == 0)
 266                                 continue;
 267
 268                         intel_uncore_fw_release_timer(&domain->timer);
 269                 }
 270
 271                 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 272
 273                 for_each_fw_domain(domain, dev_priv) {
 274                         if (hrtimer_active(&domain->timer))
 275                                 active_domains |= domain->mask;
 276                 }
 277
 278                 if (active_domains == 0)
 279                         break;
 280
 281                 if (--retry_count == 0) {
 282                         DRM_ERROR("Timed out waiting for forcewake timers to finish\n");
 283                         break;
 284                 }
 285
 286                 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 287 #if 0
 288                 cond_resched();
 289 #endif
 290         }
 291
 292         WARN_ON(active_domains);
 293
 294         for_each_fw_domain(domain, dev_priv)
 295                 if (domain->wake_count)
 296                         fw |= domain->mask;
 297
 298         if (fw)
 299                 dev_priv->uncore.funcs.force_wake_put(dev_priv, fw);
 300
 301         fw_domains_reset(dev_priv, FORCEWAKE_ALL);
 302
 303         if (restore) { /* If reset with a user forcewake, try to restore */
 304                 if (fw)
 305                         dev_priv->uncore.funcs.force_wake_get(dev_priv, fw);
 306
 307                 if (IS_GEN6(dev) || IS_GEN7(dev))
 308                         dev_priv->uncore.fifo_count =
 309                                 fifo_free_entries(dev_priv);
 310         }
 311
 312         if (!restore)
 313                 assert_forcewakes_inactive(dev_priv);
 314
 315         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 316 }
 317
 318 static u64 gen9_edram_size(struct drm_i915_private *dev_priv)
 319 {
 320         const unsigned int ways[8] = { 4, 8, 12, 16, 16, 16, 16, 16 };
 321         const unsigned int sets[4] = { 1, 1, 2, 2 };
 322         const u32 cap = dev_priv->edram_cap;
 323
 324         return EDRAM_NUM_BANKS(cap) *
 325                 ways[EDRAM_WAYS_IDX(cap)] *
 326                 sets[EDRAM_SETS_IDX(cap)] *
 327                 1024 * 1024;
 328 }
 329
 330 u64 intel_uncore_edram_size(struct drm_i915_private *dev_priv)
 331 {
 332         if (!HAS_EDRAM(dev_priv))
 333                 return 0;
 334
 335         /* The needed capability bits for size calculation
 336          * are not there with pre gen9 so return 128MB always.
 337          */
 338         if (INTEL_GEN(dev_priv) < 9)
 339                 return 128 * 1024 * 1024;
 340
 341         return gen9_edram_size(dev_priv);
 342 }
 343
 344 static void intel_uncore_edram_detect(struct drm_i915_private *dev_priv)
 345 {
 346         if (IS_HASWELL(dev_priv) ||
 347             IS_BROADWELL(dev_priv) ||
 348             INTEL_GEN(dev_priv) >= 9) {
 349                 dev_priv->edram_cap = __raw_i915_read32(dev_priv,
 350                                                         HSW_EDRAM_CAP);
 351
 352                 /* NB: We can't write IDICR yet because we do not have gt funcs
 353                  * set up */
 354         } else {
 355                 dev_priv->edram_cap = 0;
 356         }
 357
 358         if (HAS_EDRAM(dev_priv))
 359                 DRM_INFO("Found %lluMB of eDRAM\n",
 360                          intel_uncore_edram_size(dev_priv) / (1024 * 1024));
 361 }
 362
 363 static bool
 364 fpga_check_for_unclaimed_mmio(struct drm_i915_private *dev_priv)
 365 {
 366         u32 dbg;
 367
 368         dbg = __raw_i915_read32(dev_priv, FPGA_DBG);
 369         if (likely(!(dbg & FPGA_DBG_RM_NOCLAIM)))
 370                 return false;
 371
 372         __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 373
 374         return true;
 375 }
 376
 377 static bool
 378 vlv_check_for_unclaimed_mmio(struct drm_i915_private *dev_priv)
 379 {
 380         u32 cer;
 381
 382         cer = __raw_i915_read32(dev_priv, CLAIM_ER);
 383         if (likely(!(cer & (CLAIM_ER_OVERFLOW | CLAIM_ER_CTR_MASK))))
 384                 return false;
 385
 386         __raw_i915_write32(dev_priv, CLAIM_ER, CLAIM_ER_CLR);
 387
 388         return true;
 389 }
 390
 391 static bool
 392 check_for_unclaimed_mmio(struct drm_i915_private *dev_priv)
 393 {
 394         if (HAS_FPGA_DBG_UNCLAIMED(dev_priv))
 395                 return fpga_check_for_unclaimed_mmio(dev_priv);
 396
 397         if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 398                 return vlv_check_for_unclaimed_mmio(dev_priv);
 399
 400         return false;
 401 }
 402
 403 static void __intel_uncore_early_sanitize(struct drm_device *dev,
 404                                           bool restore_forcewake)
 405 {
 406         struct drm_i915_private *dev_priv = dev->dev_private;
 407
 408         /* clear out unclaimed reg detection bit */
 409         if (check_for_unclaimed_mmio(dev_priv))
 410                 DRM_DEBUG("unclaimed mmio detected on uncore init, clearing\n");
 411
 412         /* clear out old GT FIFO errors */
 413         if (IS_GEN6(dev) || IS_GEN7(dev))
 414                 __raw_i915_write32(dev_priv, GTFIFODBG,
 415                                    __raw_i915_read32(dev_priv, GTFIFODBG));
 416
 417         /* WaDisableShadowRegForCpd:chv */
 418         if (IS_CHERRYVIEW(dev)) {
 419                 __raw_i915_write32(dev_priv, GTFIFOCTL,
 420                                    __raw_i915_read32(dev_priv, GTFIFOCTL) |
 421                                    GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL |
 422                                    GT_FIFO_CTL_RC6_POLICY_STALL);
 423         }
 424
 425         intel_uncore_forcewake_reset(dev, restore_forcewake);
 426 }
 427
 428 void intel_uncore_early_sanitize(struct drm_device *dev, bool restore_forcewake)
 429 {
 430         __intel_uncore_early_sanitize(dev, restore_forcewake);
 431         i915_check_and_clear_faults(dev);
 432 }
 433
 434 void intel_uncore_sanitize(struct drm_device *dev)
 435 {
 436         i915.enable_rc6 = sanitize_rc6_option(dev, i915.enable_rc6);
 437
 438         /* BIOS often leaves RC6 enabled, but disable it for hw init */
 439         intel_disable_gt_powersave(dev);
 440 }
 441
 442 static void __intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
 443                                          enum forcewake_domains fw_domains)
 444 {
 445         struct intel_uncore_forcewake_domain *domain;
 446
 447         if (!dev_priv->uncore.funcs.force_wake_get)
 448                 return;
 449
 450         fw_domains &= dev_priv->uncore.fw_domains;
 451
 452         for_each_fw_domain_masked(domain, fw_domains, dev_priv) {
 453                 if (domain->wake_count++)
 454                         fw_domains &= ~domain->mask;
 455         }
 456
 457         if (fw_domains)
 458                 dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
 459 }
 460
 461 /**
 462  * intel_uncore_forcewake_get - grab forcewake domain references
 463  * @dev_priv: i915 device instance
 464  * @fw_domains: forcewake domains to get reference on
 465  *
 466  * This function can be used get GT's forcewake domain references.
 467  * Normal register access will handle the forcewake domains automatically.
 468  * However if some sequence requires the GT to not power down a particular
 469  * forcewake domains this function should be called at the beginning of the
 470  * sequence. And subsequently the reference should be dropped by symmetric
 471  * call to intel_unforce_forcewake_put(). Usually caller wants all the domains
 472  * to be kept awake so the @fw_domains would be then FORCEWAKE_ALL.
 473  */
 474 void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
 475                                 enum forcewake_domains fw_domains)
 476 {
 477         unsigned long irqflags;
 478
 479         if (!dev_priv->uncore.funcs.force_wake_get)
 480                 return;
 481
 482         assert_rpm_wakelock_held(dev_priv);
 483
 484         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 485         __intel_uncore_forcewake_get(dev_priv, fw_domains);
 486         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 487 }
 488
 489 /**
 490  * intel_uncore_forcewake_get__locked - grab forcewake domain references
 491  * @dev_priv: i915 device instance
 492  * @fw_domains: forcewake domains to get reference on
 493  *
 494  * See intel_uncore_forcewake_get(). This variant places the onus
 495  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
 496  */
 497 void intel_uncore_forcewake_get__locked(struct drm_i915_private *dev_priv,
 498                                         enum forcewake_domains fw_domains)
 499 {
 500         assert_spin_locked(&dev_priv->uncore.lock);
 501
 502         if (!dev_priv->uncore.funcs.force_wake_get)
 503                 return;
 504
 505         __intel_uncore_forcewake_get(dev_priv, fw_domains);
 506 }
 507
 508 static void __intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
 509                                          enum forcewake_domains fw_domains)
 510 {
 511         struct intel_uncore_forcewake_domain *domain;
 512
 513         if (!dev_priv->uncore.funcs.force_wake_put)
 514                 return;
 515
 516         fw_domains &= dev_priv->uncore.fw_domains;
 517
 518         for_each_fw_domain_masked(domain, fw_domains, dev_priv) {
 519                 if (WARN_ON(domain->wake_count == 0))
 520                         continue;
 521
 522                 if (--domain->wake_count)
 523                         continue;
 524
 525                 fw_domain_arm_timer(domain);
 526         }
 527 }
 528
 529 /**
 530  * intel_uncore_forcewake_put - release a forcewake domain reference
 531  * @dev_priv: i915 device instance
 532  * @fw_domains: forcewake domains to put references
 533  *
 534  * This function drops the device-level forcewakes for specified
 535  * domains obtained by intel_uncore_forcewake_get().
 536  */
 537 void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
 538                                 enum forcewake_domains fw_domains)
 539 {
 540         unsigned long irqflags;
 541
 542         if (!dev_priv->uncore.funcs.force_wake_put)
 543                 return;
 544
 545         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 546         __intel_uncore_forcewake_put(dev_priv, fw_domains);
 547         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 548 }
 549
 550 /**
 551  * intel_uncore_forcewake_put__locked - grab forcewake domain references
 552  * @dev_priv: i915 device instance
 553  * @fw_domains: forcewake domains to get reference on
 554  *
 555  * See intel_uncore_forcewake_put(). This variant places the onus
 556  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
 557  */
 558 void intel_uncore_forcewake_put__locked(struct drm_i915_private *dev_priv,
 559                                         enum forcewake_domains fw_domains)
 560 {
 561         assert_spin_locked(&dev_priv->uncore.lock);
 562
 563         if (!dev_priv->uncore.funcs.force_wake_put)
 564                 return;
 565
 566         __intel_uncore_forcewake_put(dev_priv, fw_domains);
 567 }
 568
 569 void assert_forcewakes_inactive(struct drm_i915_private *dev_priv)
 570 {
 571         struct intel_uncore_forcewake_domain *domain;
 572
 573         if (!dev_priv->uncore.funcs.force_wake_get)
 574                 return;
 575
 576         for_each_fw_domain(domain, dev_priv)
 577                 WARN_ON(domain->wake_count);
 578 }
 579
 580 /* We give fast paths for the really cool registers */
 581 #define NEEDS_FORCE_WAKE(reg) ((reg) < 0x40000)
 582
 583 #define __gen6_reg_read_fw_domains(offset) \
 584 ({ \
 585         enum forcewake_domains __fwd; \
 586         if (NEEDS_FORCE_WAKE(offset)) \
 587                 __fwd = FORCEWAKE_RENDER; \
 588         else \
 589                 __fwd = 0; \
 590         __fwd; \
 591 })
 592
 593 #define REG_RANGE(reg, start, end) ((reg) >= (start) && (reg) < (end))
 594
 595 #define FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg) \
 596         (REG_RANGE((reg), 0x2000, 0x4000) || \
 597          REG_RANGE((reg), 0x5000, 0x8000) || \
 598          REG_RANGE((reg), 0xB000, 0x12000) || \
 599          REG_RANGE((reg), 0x2E000, 0x30000))
 600
 601 #define FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg) \
 602         (REG_RANGE((reg), 0x12000, 0x14000) || \
 603          REG_RANGE((reg), 0x22000, 0x24000) || \
 604          REG_RANGE((reg), 0x30000, 0x40000))
 605
 606 #define __vlv_reg_read_fw_domains(offset) \
 607 ({ \
 608         enum forcewake_domains __fwd = 0; \
 609         if (!NEEDS_FORCE_WAKE(offset)) \
 610                 __fwd = 0; \
 611         else if (FORCEWAKE_VLV_RENDER_RANGE_OFFSET(offset)) \
 612                 __fwd = FORCEWAKE_RENDER; \
 613         else if (FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(offset)) \
 614                 __fwd = FORCEWAKE_MEDIA; \
 615         __fwd; \
 616 })
 617
 618 static const i915_reg_t gen8_shadowed_regs[] = {
 619         GEN6_RPNSWREQ,
 620         GEN6_RC_VIDEO_FREQ,
 621         RING_TAIL(RENDER_RING_BASE),
 622         RING_TAIL(GEN6_BSD_RING_BASE),
 623         RING_TAIL(VEBOX_RING_BASE),
 624         RING_TAIL(BLT_RING_BASE),
 625         /* TODO: Other registers are not yet used */
 626 };
 627
 628 static bool is_gen8_shadowed(u32 offset)
 629 {
 630         int i;
 631         for (i = 0; i < ARRAY_SIZE(gen8_shadowed_regs); i++)
 632                 if (offset == gen8_shadowed_regs[i].reg)
 633                         return true;
 634
 635         return false;
 636 }
 637
 638 #define __gen8_reg_write_fw_domains(offset) \
 639 ({ \
 640         enum forcewake_domains __fwd; \
 641         if (NEEDS_FORCE_WAKE(offset) && !is_gen8_shadowed(offset)) \
 642                 __fwd = FORCEWAKE_RENDER; \
 643         else \
 644                 __fwd = 0; \
 645         __fwd; \
 646 })
 647
 648 #define FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg) \
 649         (REG_RANGE((reg), 0x2000, 0x4000) || \
 650          REG_RANGE((reg), 0x5200, 0x8000) || \
 651          REG_RANGE((reg), 0x8300, 0x8500) || \
 652          REG_RANGE((reg), 0xB000, 0xB480) || \
 653          REG_RANGE((reg), 0xE000, 0xE800))
 654
 655 #define FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg) \
 656         (REG_RANGE((reg), 0x8800, 0x8900) || \
 657          REG_RANGE((reg), 0xD000, 0xD800) || \
 658          REG_RANGE((reg), 0x12000, 0x14000) || \
 659          REG_RANGE((reg), 0x1A000, 0x1C000) || \
 660          REG_RANGE((reg), 0x1E800, 0x1EA00) || \
 661          REG_RANGE((reg), 0x30000, 0x38000))
 662
 663 #define FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg) \
 664         (REG_RANGE((reg), 0x4000, 0x5000) || \
 665          REG_RANGE((reg), 0x8000, 0x8300) || \
 666          REG_RANGE((reg), 0x8500, 0x8600) || \
 667          REG_RANGE((reg), 0x9000, 0xB000) || \
 668          REG_RANGE((reg), 0xF000, 0x10000))
 669
 670 #define __chv_reg_read_fw_domains(offset) \
 671 ({ \
 672         enum forcewake_domains __fwd = 0; \
 673         if (!NEEDS_FORCE_WAKE(offset)) \
 674                 __fwd = 0; \
 675         else if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(offset)) \
 676                 __fwd = FORCEWAKE_RENDER; \
 677         else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(offset)) \
 678                 __fwd = FORCEWAKE_MEDIA; \
 679         else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(offset)) \
 680                 __fwd = FORCEWAKE_RENDER | FORCEWAKE_MEDIA; \
 681         __fwd; \
 682 })
 683
 684 #define __chv_reg_write_fw_domains(offset) \
 685 ({ \
 686         enum forcewake_domains __fwd = 0; \
 687         if (!NEEDS_FORCE_WAKE(offset) || is_gen8_shadowed(offset)) \
 688                 __fwd = 0; \
 689         else if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(offset)) \
 690                 __fwd = FORCEWAKE_RENDER; \
 691         else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(offset)) \
 692                 __fwd = FORCEWAKE_MEDIA; \
 693         else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(offset)) \
 694                 __fwd = FORCEWAKE_RENDER | FORCEWAKE_MEDIA; \
 695         __fwd; \
 696 })
 697
 698 #define FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) \
 699         REG_RANGE((reg), 0xB00,  0x2000)
 700
 701 #define FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) \
 702         (REG_RANGE((reg), 0x2000, 0x2700) || \
 703          REG_RANGE((reg), 0x3000, 0x4000) || \
 704          REG_RANGE((reg), 0x5200, 0x8000) || \
 705          REG_RANGE((reg), 0x8140, 0x8160) || \
 706          REG_RANGE((reg), 0x8300, 0x8500) || \
 707          REG_RANGE((reg), 0x8C00, 0x8D00) || \
 708          REG_RANGE((reg), 0xB000, 0xB480) || \
 709          REG_RANGE((reg), 0xE000, 0xE900) || \
 710          REG_RANGE((reg), 0x24400, 0x24800))
 711
 712 #define FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) \
 713         (REG_RANGE((reg), 0x8130, 0x8140) || \
 714          REG_RANGE((reg), 0x8800, 0x8A00) || \
 715          REG_RANGE((reg), 0xD000, 0xD800) || \
 716          REG_RANGE((reg), 0x12000, 0x14000) || \
 717          REG_RANGE((reg), 0x1A000, 0x1EA00) || \
 718          REG_RANGE((reg), 0x30000, 0x40000))
 719
 720 #define FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg) \
 721         REG_RANGE((reg), 0x9400, 0x9800)
 722
 723 #define FORCEWAKE_GEN9_BLITTER_RANGE_OFFSET(reg) \
 724         ((reg) < 0x40000 && \
 725          !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) && \
 726          !FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) && \
 727          !FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) && \
 728          !FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg))
 729
 730 #define SKL_NEEDS_FORCE_WAKE(reg) \
 731         ((reg) < 0x40000 && !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg))
 732
 733 #define __gen9_reg_read_fw_domains(offset) \
 734 ({ \
 735         enum forcewake_domains __fwd; \
 736         if (!SKL_NEEDS_FORCE_WAKE(offset)) \
 737                 __fwd = 0; \
 738         else if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(offset)) \
 739                 __fwd = FORCEWAKE_RENDER; \
 740         else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(offset)) \
 741                 __fwd = FORCEWAKE_MEDIA; \
 742         else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(offset)) \
 743                 __fwd = FORCEWAKE_RENDER | FORCEWAKE_MEDIA; \
 744         else \
 745                 __fwd = FORCEWAKE_BLITTER; \
 746         __fwd; \
 747 })
 748
 749 static const i915_reg_t gen9_shadowed_regs[] = {
 750         RING_TAIL(RENDER_RING_BASE),
 751         RING_TAIL(GEN6_BSD_RING_BASE),
 752         RING_TAIL(VEBOX_RING_BASE),
 753         RING_TAIL(BLT_RING_BASE),
 754         GEN6_RPNSWREQ,
 755         GEN6_RC_VIDEO_FREQ,
 756         /* TODO: Other registers are not yet used */
 757 };
 758
 759 static bool is_gen9_shadowed(u32 offset)
 760 {
 761         int i;
 762         for (i = 0; i < ARRAY_SIZE(gen9_shadowed_regs); i++)
 763                 if (offset == gen9_shadowed_regs[i].reg)
 764                         return true;
 765
 766         return false;
 767 }
 768
 769 #define __gen9_reg_write_fw_domains(offset) \
 770 ({ \
 771         enum forcewake_domains __fwd; \
 772         if (!SKL_NEEDS_FORCE_WAKE(offset) || is_gen9_shadowed(offset)) \
 773                 __fwd = 0; \
 774         else if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(offset)) \
 775                 __fwd = FORCEWAKE_RENDER; \
 776         else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(offset)) \
 777                 __fwd = FORCEWAKE_MEDIA; \
 778         else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(offset)) \
 779                 __fwd = FORCEWAKE_RENDER | FORCEWAKE_MEDIA; \
 780         else \
 781                 __fwd = FORCEWAKE_BLITTER; \
 782         __fwd; \
 783 })
 784
 785 static void
 786 ilk_dummy_write(struct drm_i915_private *dev_priv)
 787 {
 788         /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
 789          * the chip from rc6 before touching it for real. MI_MODE is masked,
 790          * hence harmless to write 0 into. */
 791         __raw_i915_write32(dev_priv, MI_MODE, 0);
 792 }
 793
 794 static void
 795 __unclaimed_reg_debug(struct drm_i915_private *dev_priv,
 796                       const i915_reg_t reg,
 797                       const bool read,
 798                       const bool before)
 799 {
 800         if (WARN(check_for_unclaimed_mmio(dev_priv),
 801                  "Unclaimed register detected %s %s register 0x%x\n",
 802                  before ? "before" : "after",
 803                  read ? "reading" : "writing to",
 804                  i915_mmio_reg_offset(reg)))
 805                 i915.mmio_debug--; /* Only report the first N failures */
 806 }
 807
 808 static inline void
 809 unclaimed_reg_debug(struct drm_i915_private *dev_priv,
 810                     const i915_reg_t reg,
 811                     const bool read,
 812                     const bool before)
 813 {
 814         if (likely(!i915.mmio_debug))
 815                 return;
 816
 817         __unclaimed_reg_debug(dev_priv, reg, read, before);
 818 }
 819
 820 #define GEN2_READ_HEADER(x) \
 821         u##x val = 0; \
 822         assert_rpm_wakelock_held(dev_priv);
 823
 824 #define GEN2_READ_FOOTER \
 825         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
 826         return val
 827
 828 #define __gen2_read(x) \
 829 static u##x \
 830 gen2_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
 831         GEN2_READ_HEADER(x); \
 832         val = __raw_i915_read##x(dev_priv, reg); \
 833         GEN2_READ_FOOTER; \
 834 }
 835
 836 #define __gen5_read(x) \
 837 static u##x \
 838 gen5_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
 839         GEN2_READ_HEADER(x); \
 840         ilk_dummy_write(dev_priv); \
 841         val = __raw_i915_read##x(dev_priv, reg); \
 842         GEN2_READ_FOOTER; \
 843 }
 844
 845 __gen5_read(8)
 846 __gen5_read(16)
 847 __gen5_read(32)
 848 __gen5_read(64)
 849 __gen2_read(8)
 850 __gen2_read(16)
 851 __gen2_read(32)
 852 __gen2_read(64)
 853
 854 #undef __gen5_read
 855 #undef __gen2_read
 856
 857 #undef GEN2_READ_FOOTER
 858 #undef GEN2_READ_HEADER
 859
 860 #define GEN6_READ_HEADER(x) \
 861         u32 offset = i915_mmio_reg_offset(reg); \
 862         unsigned long irqflags; \
 863         u##x val = 0; \
 864         assert_rpm_wakelock_held(dev_priv); \
 865         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); \
 866         unclaimed_reg_debug(dev_priv, reg, true, true)
 867
 868 #define GEN6_READ_FOOTER \
 869         unclaimed_reg_debug(dev_priv, reg, true, false); \
 870         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
 871         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
 872         return val
 873
 874 static inline void __force_wake_auto(struct drm_i915_private *dev_priv,
 875                                      enum forcewake_domains fw_domains)
 876 {
 877         struct intel_uncore_forcewake_domain *domain;
 878
 879         if (WARN_ON(!fw_domains))
 880                 return;
 881
 882         /* Ideally GCC would be constant-fold and eliminate this loop */
 883         for_each_fw_domain_masked(domain, fw_domains, dev_priv) {
 884                 if (domain->wake_count) {
 885                         fw_domains &= ~domain->mask;
 886                         continue;
 887                 }
 888
 889                 fw_domain_arm_timer(domain);
 890         }
 891
 892         if (fw_domains)
 893                 dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
 894 }
 895
 896 #define __gen6_read(x) \
 897 static u##x \
 898 gen6_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
 899         enum forcewake_domains fw_engine; \
 900         GEN6_READ_HEADER(x); \
 901         fw_engine = __gen6_reg_read_fw_domains(offset); \
 902         if (fw_engine) \
 903                 __force_wake_auto(dev_priv, fw_engine); \
 904         val = __raw_i915_read##x(dev_priv, reg); \
 905         GEN6_READ_FOOTER; \
 906 }
 907
 908 #define __vlv_read(x) \
 909 static u##x \
 910 vlv_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
 911         enum forcewake_domains fw_engine; \
 912         GEN6_READ_HEADER(x); \
 913         fw_engine = __vlv_reg_read_fw_domains(offset); \
 914         if (fw_engine) \
 915                 __force_wake_auto(dev_priv, fw_engine); \
 916         val = __raw_i915_read##x(dev_priv, reg); \
 917         GEN6_READ_FOOTER; \
 918 }
 919
 920 #define __chv_read(x) \
 921 static u##x \
 922 chv_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
 923         enum forcewake_domains fw_engine; \
 924         GEN6_READ_HEADER(x); \
 925         fw_engine = __chv_reg_read_fw_domains(offset); \
 926         if (fw_engine) \
 927                 __force_wake_auto(dev_priv, fw_engine); \
 928         val = __raw_i915_read##x(dev_priv, reg); \
 929         GEN6_READ_FOOTER; \
 930 }
 931
 932 #define __gen9_read(x) \
 933 static u##x \
 934 gen9_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
 935         enum forcewake_domains fw_engine; \
 936         GEN6_READ_HEADER(x); \
 937         fw_engine = __gen9_reg_read_fw_domains(offset); \
 938         if (fw_engine) \
 939                 __force_wake_auto(dev_priv, fw_engine); \
 940         val = __raw_i915_read##x(dev_priv, reg); \
 941         GEN6_READ_FOOTER; \
 942 }
 943
 944 __gen9_read(8)
 945 __gen9_read(16)
 946 __gen9_read(32)
 947 __gen9_read(64)
 948 __chv_read(8)
 949 __chv_read(16)
 950 __chv_read(32)
 951 __chv_read(64)
 952 __vlv_read(8)
 953 __vlv_read(16)
 954 __vlv_read(32)
 955 __vlv_read(64)
 956 __gen6_read(8)
 957 __gen6_read(16)
 958 __gen6_read(32)
 959 __gen6_read(64)
 960
 961 #undef __gen9_read
 962 #undef __chv_read
 963 #undef __vlv_read
 964 #undef __gen6_read
 965 #undef GEN6_READ_FOOTER
 966 #undef GEN6_READ_HEADER
 967
 968 #define VGPU_READ_HEADER(x) \
 969         unsigned long irqflags; \
 970         u##x val = 0; \
 971         assert_rpm_device_not_suspended(dev_priv); \
 972         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
 973
 974 #define VGPU_READ_FOOTER \
 975         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
 976         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
 977         return val
 978
 979 #define __vgpu_read(x) \
 980 static u##x \
 981 vgpu_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
 982         VGPU_READ_HEADER(x); \
 983         val = __raw_i915_read##x(dev_priv, reg); \
 984         VGPU_READ_FOOTER; \
 985 }
 986
 987 __vgpu_read(8)
 988 __vgpu_read(16)
 989 __vgpu_read(32)
 990 __vgpu_read(64)
 991
 992 #undef __vgpu_read
 993 #undef VGPU_READ_FOOTER
 994 #undef VGPU_READ_HEADER
 995
 996 #define GEN2_WRITE_HEADER \
 997         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
 998         assert_rpm_wakelock_held(dev_priv); \
 999
1000 #define GEN2_WRITE_FOOTER
1001
1002 #define __gen2_write(x) \
1003 static void \
1004 gen2_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1005         GEN2_WRITE_HEADER; \
1006         __raw_i915_write##x(dev_priv, reg, val); \
1007         GEN2_WRITE_FOOTER; \
1008 }
1009
1010 #define __gen5_write(x) \
1011 static void \
1012 gen5_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1013         GEN2_WRITE_HEADER; \
1014         ilk_dummy_write(dev_priv); \
1015         __raw_i915_write##x(dev_priv, reg, val); \
1016         GEN2_WRITE_FOOTER; \
1017 }
1018
1019 __gen5_write(8)
1020 __gen5_write(16)
1021 __gen5_write(32)
1022 __gen5_write(64)
1023 __gen2_write(8)
1024 __gen2_write(16)
1025 __gen2_write(32)
1026 __gen2_write(64)
1027
1028 #undef __gen5_write
1029 #undef __gen2_write
1030
1031 #undef GEN2_WRITE_FOOTER
1032 #undef GEN2_WRITE_HEADER
1033
1034 #define GEN6_WRITE_HEADER \
1035         u32 offset = i915_mmio_reg_offset(reg); \
1036         unsigned long irqflags; \
1037         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1038         assert_rpm_wakelock_held(dev_priv); \
1039         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); \
1040         unclaimed_reg_debug(dev_priv, reg, false, true)
1041
1042 #define GEN6_WRITE_FOOTER \
1043         unclaimed_reg_debug(dev_priv, reg, false, false); \
1044         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags)
1045
1046 #define __gen6_write(x) \
1047 static void \
1048 gen6_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1049         u32 __fifo_ret = 0; \
1050         GEN6_WRITE_HEADER; \
1051         if (NEEDS_FORCE_WAKE(offset)) { \
1052                 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
1053         } \
1054         __raw_i915_write##x(dev_priv, reg, val); \
1055         if (unlikely(__fifo_ret)) { \
1056                 gen6_gt_check_fifodbg(dev_priv); \
1057         } \
1058         GEN6_WRITE_FOOTER; \
1059 }
1060
1061 #define __hsw_write(x) \
1062 static void \
1063 hsw_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1064         u32 __fifo_ret = 0; \
1065         GEN6_WRITE_HEADER; \
1066         if (NEEDS_FORCE_WAKE(offset)) { \
1067                 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
1068         } \
1069         __raw_i915_write##x(dev_priv, reg, val); \
1070         if (unlikely(__fifo_ret)) { \
1071                 gen6_gt_check_fifodbg(dev_priv); \
1072         } \
1073         GEN6_WRITE_FOOTER; \
1074 }
1075
1076 #define __gen8_write(x) \
1077 static void \
1078 gen8_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1079         enum forcewake_domains fw_engine; \
1080         GEN6_WRITE_HEADER; \
1081         fw_engine = __gen8_reg_write_fw_domains(offset); \
1082         if (fw_engine) \
1083                 __force_wake_auto(dev_priv, fw_engine); \
1084         __raw_i915_write##x(dev_priv, reg, val); \
1085         GEN6_WRITE_FOOTER; \
1086 }
1087
1088 #define __chv_write(x) \
1089 static void \
1090 chv_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1091         enum forcewake_domains fw_engine; \
1092         GEN6_WRITE_HEADER; \
1093         fw_engine = __chv_reg_write_fw_domains(offset); \
1094         if (fw_engine) \
1095                 __force_wake_auto(dev_priv, fw_engine); \
1096         __raw_i915_write##x(dev_priv, reg, val); \
1097         GEN6_WRITE_FOOTER; \
1098 }
1099
1100 #define __gen9_write(x) \
1101 static void \
1102 gen9_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, \
1103                 bool trace) { \
1104         enum forcewake_domains fw_engine; \
1105         GEN6_WRITE_HEADER; \
1106         fw_engine = __gen9_reg_write_fw_domains(offset); \
1107         if (fw_engine) \
1108                 __force_wake_auto(dev_priv, fw_engine); \
1109         __raw_i915_write##x(dev_priv, reg, val); \
1110         GEN6_WRITE_FOOTER; \
1111 }
1112
1113 __gen9_write(8)
1114 __gen9_write(16)
1115 __gen9_write(32)
1116 __gen9_write(64)
1117 __chv_write(8)
1118 __chv_write(16)
1119 __chv_write(32)
1120 __chv_write(64)
1121 __gen8_write(8)
1122 __gen8_write(16)
1123 __gen8_write(32)
1124 __gen8_write(64)
1125 __hsw_write(8)
1126 __hsw_write(16)
1127 __hsw_write(32)
1128 __hsw_write(64)
1129 __gen6_write(8)
1130 __gen6_write(16)
1131 __gen6_write(32)
1132 __gen6_write(64)
1133
1134 #undef __gen9_write
1135 #undef __chv_write
1136 #undef __gen8_write
1137 #undef __hsw_write
1138 #undef __gen6_write
1139 #undef GEN6_WRITE_FOOTER
1140 #undef GEN6_WRITE_HEADER
1141
1142 #define VGPU_WRITE_HEADER \
1143         unsigned long irqflags; \
1144         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1145         assert_rpm_device_not_suspended(dev_priv); \
1146         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
1147
1148 #define VGPU_WRITE_FOOTER \
1149         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags)
1150
1151 #define __vgpu_write(x) \
1152 static void vgpu_write##x(struct drm_i915_private *dev_priv, \
1153                           i915_reg_t reg, u##x val, bool trace) { \
1154         VGPU_WRITE_HEADER; \
1155         __raw_i915_write##x(dev_priv, reg, val); \
1156         VGPU_WRITE_FOOTER; \
1157 }
1158
1159 __vgpu_write(8)
1160 __vgpu_write(16)
1161 __vgpu_write(32)
1162 __vgpu_write(64)
1163
1164 #undef __vgpu_write
1165 #undef VGPU_WRITE_FOOTER
1166 #undef VGPU_WRITE_HEADER
1167
1168 #define ASSIGN_WRITE_MMIO_VFUNCS(x) \
1169 do { \
1170         dev_priv->uncore.funcs.mmio_writeb = x##_write8; \
1171         dev_priv->uncore.funcs.mmio_writew = x##_write16; \
1172         dev_priv->uncore.funcs.mmio_writel = x##_write32; \
1173         dev_priv->uncore.funcs.mmio_writeq = x##_write64; \
1174 } while (0)
1175
1176 #define ASSIGN_READ_MMIO_VFUNCS(x) \
1177 do { \
1178         dev_priv->uncore.funcs.mmio_readb = x##_read8; \
1179         dev_priv->uncore.funcs.mmio_readw = x##_read16; \
1180         dev_priv->uncore.funcs.mmio_readl = x##_read32; \
1181         dev_priv->uncore.funcs.mmio_readq = x##_read64; \
1182 } while (0)
1183
1184
1185 static void fw_domain_init(struct drm_i915_private *dev_priv,
1186                            enum forcewake_domain_id domain_id,
1187                            i915_reg_t reg_set,
1188                            i915_reg_t reg_ack)
1189 {
1190         struct intel_uncore_forcewake_domain *d;
1191
1192         if (WARN_ON(domain_id >= FW_DOMAIN_ID_COUNT))
1193                 return;
1194
1195         d = &dev_priv->uncore.fw_domain[domain_id];
1196
1197         WARN_ON(d->wake_count);
1198
1199         d->wake_count = 0;
1200         d->reg_set = reg_set;
1201         d->reg_ack = reg_ack;
1202
1203         if (IS_GEN6(dev_priv)) {
1204                 d->val_reset = 0;
1205                 d->val_set = FORCEWAKE_KERNEL;
1206                 d->val_clear = 0;
1207         } else {
1208                 /* WaRsClearFWBitsAtReset:bdw,skl */
1209                 d->val_reset = _MASKED_BIT_DISABLE(0xffff);
1210                 d->val_set = _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL);
1211                 d->val_clear = _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL);
1212         }
1213
1214         if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1215                 d->reg_post = FORCEWAKE_ACK_VLV;
1216         else if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv) || IS_GEN8(dev_priv))
1217                 d->reg_post = ECOBUS;
1218
1219         d->i915 = dev_priv;
1220         d->id = domain_id;
1221
1222         BUILD_BUG_ON(FORCEWAKE_RENDER != (1 << FW_DOMAIN_ID_RENDER));
1223         BUILD_BUG_ON(FORCEWAKE_BLITTER != (1 << FW_DOMAIN_ID_BLITTER));
1224         BUILD_BUG_ON(FORCEWAKE_MEDIA != (1 << FW_DOMAIN_ID_MEDIA));
1225
1226         d->mask = 1 << domain_id;
1227
1228         hrtimer_init(&d->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
1229         d->timer.function = intel_uncore_fw_release_timer;
1230
1231         dev_priv->uncore.fw_domains |= (1 << domain_id);
1232
1233         fw_domain_reset(d);
1234 }
1235
1236 static void intel_uncore_fw_domains_init(struct drm_device *dev)
1237 {
1238         struct drm_i915_private *dev_priv = dev->dev_private;
1239
1240         if (INTEL_INFO(dev_priv)->gen <= 5)
1241                 return;
1242
1243         if (IS_GEN9(dev)) {
1244                 dev_priv->uncore.funcs.force_wake_get = fw_domains_get;
1245                 dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1246                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1247                                FORCEWAKE_RENDER_GEN9,
1248                                FORCEWAKE_ACK_RENDER_GEN9);
1249                 fw_domain_init(dev_priv, FW_DOMAIN_ID_BLITTER,
1250                                FORCEWAKE_BLITTER_GEN9,
1251                                FORCEWAKE_ACK_BLITTER_GEN9);
1252                 fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA,
1253                                FORCEWAKE_MEDIA_GEN9, FORCEWAKE_ACK_MEDIA_GEN9);
1254         } else if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
1255                 dev_priv->uncore.funcs.force_wake_get = fw_domains_get;
1256                 if (!IS_CHERRYVIEW(dev))
1257                         dev_priv->uncore.funcs.force_wake_put =
1258                                 fw_domains_put_with_fifo;
1259                 else
1260                         dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1261                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1262                                FORCEWAKE_VLV, FORCEWAKE_ACK_VLV);
1263                 fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA,
1264                                FORCEWAKE_MEDIA_VLV, FORCEWAKE_ACK_MEDIA_VLV);
1265         } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
1266                 dev_priv->uncore.funcs.force_wake_get =
1267                         fw_domains_get_with_thread_status;
1268                 if (IS_HASWELL(dev))
1269                         dev_priv->uncore.funcs.force_wake_put =
1270                                 fw_domains_put_with_fifo;
1271                 else
1272                         dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1273                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1274                                FORCEWAKE_MT, FORCEWAKE_ACK_HSW);
1275         } else if (IS_IVYBRIDGE(dev)) {
1276                 u32 ecobus;
1277
1278                 /* IVB configs may use multi-threaded forcewake */
1279
1280                 /* A small trick here - if the bios hasn't configured
1281                  * MT forcewake, and if the device is in RC6, then
1282                  * force_wake_mt_get will not wake the device and the
1283                  * ECOBUS read will return zero. Which will be
1284                  * (correctly) interpreted by the test below as MT
1285                  * forcewake being disabled.
1286                  */
1287                 dev_priv->uncore.funcs.force_wake_get =
1288                         fw_domains_get_with_thread_status;
1289                 dev_priv->uncore.funcs.force_wake_put =
1290                         fw_domains_put_with_fifo;
1291
1292                 /* We need to init first for ECOBUS access and then
1293                  * determine later if we want to reinit, in case of MT access is
1294                  * not working. In this stage we don't know which flavour this
1295                  * ivb is, so it is better to reset also the gen6 fw registers
1296                  * before the ecobus check.
1297                  */
1298
1299                 __raw_i915_write32(dev_priv, FORCEWAKE, 0);
1300                 __raw_posting_read(dev_priv, ECOBUS);
1301
1302                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1303                                FORCEWAKE_MT, FORCEWAKE_MT_ACK);
1304
1305                 mutex_lock(&dev->struct_mutex);
1306                 fw_domains_get_with_thread_status(dev_priv, FORCEWAKE_ALL);
1307                 ecobus = __raw_i915_read32(dev_priv, ECOBUS);
1308                 fw_domains_put_with_fifo(dev_priv, FORCEWAKE_ALL);
1309                 mutex_unlock(&dev->struct_mutex);
1310
1311                 if (!(ecobus & FORCEWAKE_MT_ENABLE)) {
1312                         DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
1313                         DRM_INFO("when using vblank-synced partial screen updates.\n");
1314                         fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1315                                        FORCEWAKE, FORCEWAKE_ACK);
1316                 }
1317         } else if (IS_GEN6(dev)) {
1318                 dev_priv->uncore.funcs.force_wake_get =
1319                         fw_domains_get_with_thread_status;
1320                 dev_priv->uncore.funcs.force_wake_put =
1321                         fw_domains_put_with_fifo;
1322                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1323                                FORCEWAKE, FORCEWAKE_ACK);
1324         }
1325
1326         /* All future platforms are expected to require complex power gating */
1327         WARN_ON(dev_priv->uncore.fw_domains == 0);
1328 }
1329
1330 void intel_uncore_init(struct drm_device *dev)
1331 {
1332         struct drm_i915_private *dev_priv = dev->dev_private;
1333
1334         i915_check_vgpu(dev);
1335
1336         intel_uncore_edram_detect(dev_priv);
1337         intel_uncore_fw_domains_init(dev);
1338         __intel_uncore_early_sanitize(dev, false);
1339
1340         dev_priv->uncore.unclaimed_mmio_check = 1;
1341
1342         switch (INTEL_INFO(dev)->gen) {
1343         default:
1344         case 9:
1345                 ASSIGN_WRITE_MMIO_VFUNCS(gen9);
1346                 ASSIGN_READ_MMIO_VFUNCS(gen9);
1347                 break;
1348         case 8:
1349                 if (IS_CHERRYVIEW(dev)) {
1350                         ASSIGN_WRITE_MMIO_VFUNCS(chv);
1351                         ASSIGN_READ_MMIO_VFUNCS(chv);
1352
1353                 } else {
1354                         ASSIGN_WRITE_MMIO_VFUNCS(gen8);
1355                         ASSIGN_READ_MMIO_VFUNCS(gen6);
1356                 }
1357                 break;
1358         case 7:
1359         case 6:
1360                 if (IS_HASWELL(dev)) {
1361                         ASSIGN_WRITE_MMIO_VFUNCS(hsw);
1362                 } else {
1363                         ASSIGN_WRITE_MMIO_VFUNCS(gen6);
1364                 }
1365
1366                 if (IS_VALLEYVIEW(dev)) {
1367                         ASSIGN_READ_MMIO_VFUNCS(vlv);
1368                 } else {
1369                         ASSIGN_READ_MMIO_VFUNCS(gen6);
1370                 }
1371                 break;
1372         case 5:
1373                 ASSIGN_WRITE_MMIO_VFUNCS(gen5);
1374                 ASSIGN_READ_MMIO_VFUNCS(gen5);
1375                 break;
1376         case 4:
1377         case 3:
1378         case 2:
1379                 ASSIGN_WRITE_MMIO_VFUNCS(gen2);
1380                 ASSIGN_READ_MMIO_VFUNCS(gen2);
1381                 break;
1382         }
1383
1384         if (intel_vgpu_active(dev)) {
1385                 ASSIGN_WRITE_MMIO_VFUNCS(vgpu);
1386                 ASSIGN_READ_MMIO_VFUNCS(vgpu);
1387         }
1388
1389         i915_check_and_clear_faults(dev);
1390 }
1391 #undef ASSIGN_WRITE_MMIO_VFUNCS
1392 #undef ASSIGN_READ_MMIO_VFUNCS
1393
1394 void intel_uncore_fini(struct drm_device *dev)
1395 {
1396         /* Paranoia: make sure we have disabled everything before we exit. */
1397         intel_uncore_sanitize(dev);
1398         intel_uncore_forcewake_reset(dev, false);
1399 }
1400
1401 #define GEN_RANGE(l, h) GENMASK(h, l)
1402
1403 static const struct register_whitelist {
1404         i915_reg_t offset_ldw, offset_udw;
1405         uint32_t size;
1406         /* supported gens, 0x10 for 4, 0x30 for 4 and 5, etc. */
1407         uint32_t gen_bitmask;
1408 } whitelist[] = {
1409         { .offset_ldw = RING_TIMESTAMP(RENDER_RING_BASE),
1410           .offset_udw = RING_TIMESTAMP_UDW(RENDER_RING_BASE),
1411           .size = 8, .gen_bitmask = GEN_RANGE(4, 9) },
1412 };
1413
1414 int i915_reg_read_ioctl(struct drm_device *dev,
1415                         void *data, struct drm_file *file)
1416 {
1417         struct drm_i915_private *dev_priv = dev->dev_private;
1418         struct drm_i915_reg_read *reg = data;
1419         struct register_whitelist const *entry = whitelist;
1420         unsigned size;
1421         i915_reg_t offset_ldw, offset_udw;
1422         int i, ret = 0;
1423
1424         for (i = 0; i < ARRAY_SIZE(whitelist); i++, entry++) {
1425                 if (i915_mmio_reg_offset(entry->offset_ldw) == (reg->offset & -entry->size) &&
1426                     (1 << INTEL_INFO(dev)->gen & entry->gen_bitmask))
1427                         break;
1428         }
1429
1430         if (i == ARRAY_SIZE(whitelist))
1431                 return -EINVAL;
1432
1433         /* We use the low bits to encode extra flags as the register should
1434          * be naturally aligned (and those that are not so aligned merely
1435          * limit the available flags for that register).
1436          */
1437         offset_ldw = entry->offset_ldw;
1438         offset_udw = entry->offset_udw;
1439         size = entry->size;
1440         size |= reg->offset ^ i915_mmio_reg_offset(offset_ldw);
1441
1442         intel_runtime_pm_get(dev_priv);
1443
1444         switch (size) {
1445         case 8 | 1:
1446                 reg->val = I915_READ64_2x32(offset_ldw, offset_udw);
1447                 break;
1448         case 8:
1449                 reg->val = I915_READ64(offset_ldw);
1450                 break;
1451         case 4:
1452                 reg->val = I915_READ(offset_ldw);
1453                 break;
1454         case 2:
1455                 reg->val = I915_READ16(offset_ldw);
1456                 break;
1457         case 1:
1458                 reg->val = I915_READ8(offset_ldw);
1459                 break;
1460         default:
1461                 ret = -EINVAL;
1462                 goto out;
1463         }
1464
1465 out:
1466         intel_runtime_pm_put(dev_priv);
1467         return ret;
1468 }
1469
1470 int i915_get_reset_stats_ioctl(struct drm_device *dev,
1471                                void *data, struct drm_file *file)
1472 {
1473         struct drm_i915_private *dev_priv = dev->dev_private;
1474         struct drm_i915_reset_stats *args = data;
1475         struct i915_ctx_hang_stats *hs;
1476         struct intel_context *ctx;
1477         int ret;
1478
1479         if (args->flags || args->pad)
1480                 return -EINVAL;
1481
1482         if (args->ctx_id == DEFAULT_CONTEXT_HANDLE && !capable(CAP_SYS_ADMIN))
1483                 return -EPERM;
1484
1485         ret = mutex_lock_interruptible(&dev->struct_mutex);
1486         if (ret)
1487                 return ret;
1488
1489         ctx = i915_gem_context_get(file->driver_priv, args->ctx_id);
1490         if (IS_ERR(ctx)) {
1491                 mutex_unlock(&dev->struct_mutex);
1492                 return PTR_ERR(ctx);
1493         }
1494         hs = &ctx->hang_stats;
1495
1496         if (capable(CAP_SYS_ADMIN))
1497                 args->reset_count = i915_reset_count(&dev_priv->gpu_error);
1498         else
1499                 args->reset_count = 0;
1500
1501         args->batch_active = hs->batch_active;
1502         args->batch_pending = hs->batch_pending;
1503
1504         mutex_unlock(&dev->struct_mutex);
1505
1506         return 0;
1507 }
1508
1509 static int i915_reset_complete(struct drm_device *dev)
1510 {
1511         u8 gdrst;
1512         pci_read_config_byte(dev->pdev, I915_GDRST, &gdrst);
1513         return (gdrst & GRDOM_RESET_STATUS) == 0;
1514 }
1515
1516 static int i915_do_reset(struct drm_device *dev, unsigned engine_mask)
1517 {
1518         /* assert reset for at least 20 usec */
1519         pci_write_config_byte(dev->pdev, I915_GDRST, GRDOM_RESET_ENABLE);
1520         udelay(20);
1521         pci_write_config_byte(dev->pdev, I915_GDRST, 0);
1522
1523         return wait_for(i915_reset_complete(dev), 500);
1524 }
1525
1526 static int g4x_reset_complete(struct drm_device *dev)
1527 {
1528         u8 gdrst;
1529         pci_read_config_byte(dev->pdev, I915_GDRST, &gdrst);
1530         return (gdrst & GRDOM_RESET_ENABLE) == 0;
1531 }
1532
1533 static int g33_do_reset(struct drm_device *dev, unsigned engine_mask)
1534 {
1535         pci_write_config_byte(dev->pdev, I915_GDRST, GRDOM_RESET_ENABLE);
1536         return wait_for(g4x_reset_complete(dev), 500);
1537 }
1538
1539 static int g4x_do_reset(struct drm_device *dev, unsigned engine_mask)
1540 {
1541         struct drm_i915_private *dev_priv = dev->dev_private;
1542         int ret;
1543
1544         pci_write_config_byte(dev->pdev, I915_GDRST,
1545                               GRDOM_RENDER | GRDOM_RESET_ENABLE);
1546         ret =  wait_for(g4x_reset_complete(dev), 500);
1547         if (ret)
1548                 return ret;
1549
1550         /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1551         I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) | VCP_UNIT_CLOCK_GATE_DISABLE);
1552         POSTING_READ(VDECCLK_GATE_D);
1553
1554         pci_write_config_byte(dev->pdev, I915_GDRST,
1555                               GRDOM_MEDIA | GRDOM_RESET_ENABLE);
1556         ret =  wait_for(g4x_reset_complete(dev), 500);
1557         if (ret)
1558                 return ret;
1559
1560         /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1561         I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) & ~VCP_UNIT_CLOCK_GATE_DISABLE);
1562         POSTING_READ(VDECCLK_GATE_D);
1563
1564         pci_write_config_byte(dev->pdev, I915_GDRST, 0);
1565
1566         return 0;
1567 }
1568
1569 static int ironlake_do_reset(struct drm_device *dev, unsigned engine_mask)
1570 {
1571         struct drm_i915_private *dev_priv = dev->dev_private;
1572         int ret;
1573
1574         I915_WRITE(ILK_GDSR,
1575                    ILK_GRDOM_RENDER | ILK_GRDOM_RESET_ENABLE);
1576         ret = wait_for((I915_READ(ILK_GDSR) &
1577                         ILK_GRDOM_RESET_ENABLE) == 0, 500);
1578         if (ret)
1579                 return ret;
1580
1581         I915_WRITE(ILK_GDSR,
1582                    ILK_GRDOM_MEDIA | ILK_GRDOM_RESET_ENABLE);
1583         ret = wait_for((I915_READ(ILK_GDSR) &
1584                         ILK_GRDOM_RESET_ENABLE) == 0, 500);
1585         if (ret)
1586                 return ret;
1587
1588         I915_WRITE(ILK_GDSR, 0);
1589
1590         return 0;
1591 }
1592
1593 /* Reset the hardware domains (GENX_GRDOM_*) specified by mask */
1594 static int gen6_hw_domain_reset(struct drm_i915_private *dev_priv,
1595                                 u32 hw_domain_mask)
1596 {
1597         int ret;
1598
1599         /* GEN6_GDRST is not in the gt power well, no need to check
1600          * for fifo space for the write or forcewake the chip for
1601          * the read
1602          */
1603         __raw_i915_write32(dev_priv, GEN6_GDRST, hw_domain_mask);
1604
1605 #define ACKED ((__raw_i915_read32(dev_priv, GEN6_GDRST) & hw_domain_mask) == 0)
1606         /* Spin waiting for the device to ack the reset requests */
1607         ret = wait_for(ACKED, 500);
1608 #undef ACKED
1609
1610         return ret;
1611 }
1612
1613 /**
1614  * gen6_reset_engines - reset individual engines
1615  * @dev: DRM device
1616  * @engine_mask: mask of intel_ring_flag() engines or ALL_ENGINES for full reset
1617  *
1618  * This function will reset the individual engines that are set in engine_mask.
1619  * If you provide ALL_ENGINES as mask, full global domain reset will be issued.
1620  *
1621  * Note: It is responsibility of the caller to handle the difference between
1622  * asking full domain reset versus reset for all available individual engines.
1623  *
1624  * Returns 0 on success, nonzero on error.
1625  */
1626 static int gen6_reset_engines(struct drm_device *dev, unsigned engine_mask)
1627 {
1628         struct drm_i915_private *dev_priv = dev->dev_private;
1629         struct intel_engine_cs *engine;
1630         const u32 hw_engine_mask[I915_NUM_ENGINES] = {
1631                 [RCS] = GEN6_GRDOM_RENDER,
1632                 [BCS] = GEN6_GRDOM_BLT,
1633                 [VCS] = GEN6_GRDOM_MEDIA,
1634                 [VCS2] = GEN8_GRDOM_MEDIA2,
1635                 [VECS] = GEN6_GRDOM_VECS,
1636         };
1637         u32 hw_mask;
1638         int ret;
1639
1640         if (engine_mask == ALL_ENGINES) {
1641                 hw_mask = GEN6_GRDOM_FULL;
1642         } else {
1643                 hw_mask = 0;
1644                 for_each_engine_masked(engine, dev_priv, engine_mask)
1645                         hw_mask |= hw_engine_mask[engine->id];
1646         }
1647
1648         ret = gen6_hw_domain_reset(dev_priv, hw_mask);
1649
1650         intel_uncore_forcewake_reset(dev, true);
1651
1652         return ret;
1653 }
1654
1655 static int wait_for_register_fw(struct drm_i915_private *dev_priv,
1656                                 i915_reg_t reg,
1657                                 const u32 mask,
1658                                 const u32 value,
1659                                 const unsigned long timeout_ms)
1660 {
1661         return wait_for((I915_READ_FW(reg) & mask) == value, timeout_ms);
1662 }
1663
1664 static int gen8_request_engine_reset(struct intel_engine_cs *engine)
1665 {
1666         int ret;
1667         struct drm_i915_private *dev_priv = engine->dev->dev_private;
1668
1669         I915_WRITE_FW(RING_RESET_CTL(engine->mmio_base),
1670                       _MASKED_BIT_ENABLE(RESET_CTL_REQUEST_RESET));
1671
1672         ret = wait_for_register_fw(dev_priv,
1673                                    RING_RESET_CTL(engine->mmio_base),
1674                                    RESET_CTL_READY_TO_RESET,
1675                                    RESET_CTL_READY_TO_RESET,
1676                                    700);
1677         if (ret)
1678                 DRM_ERROR("%s: reset request timeout\n", engine->name);
1679
1680         return ret;
1681 }
1682
1683 static void gen8_unrequest_engine_reset(struct intel_engine_cs *engine)
1684 {
1685         struct drm_i915_private *dev_priv = engine->dev->dev_private;
1686
1687         I915_WRITE_FW(RING_RESET_CTL(engine->mmio_base),
1688                       _MASKED_BIT_DISABLE(RESET_CTL_REQUEST_RESET));
1689 }
1690
1691 static int gen8_reset_engines(struct drm_device *dev, unsigned engine_mask)
1692 {
1693         struct drm_i915_private *dev_priv = dev->dev_private;
1694         struct intel_engine_cs *engine;
1695
1696         for_each_engine_masked(engine, dev_priv, engine_mask)
1697                 if (gen8_request_engine_reset(engine))
1698                         goto not_ready;
1699
1700         return gen6_reset_engines(dev, engine_mask);
1701
1702 not_ready:
1703         for_each_engine_masked(engine, dev_priv, engine_mask)
1704                 gen8_unrequest_engine_reset(engine);
1705
1706         return -EIO;
1707 }
1708
1709 static int (*intel_get_gpu_reset(struct drm_device *dev))(struct drm_device *,
1710                                                           unsigned engine_mask)
1711 {
1712         if (!i915.reset)
1713                 return NULL;
1714
1715         if (INTEL_INFO(dev)->gen >= 8)
1716                 return gen8_reset_engines;
1717         else if (INTEL_INFO(dev)->gen >= 6)
1718                 return gen6_reset_engines;
1719         else if (IS_GEN5(dev))
1720                 return ironlake_do_reset;
1721         else if (IS_G4X(dev))
1722                 return g4x_do_reset;
1723         else if (IS_G33(dev))
1724                 return g33_do_reset;
1725         else if (INTEL_INFO(dev)->gen >= 3)
1726                 return i915_do_reset;
1727         else
1728                 return NULL;
1729 }
1730
1731 int intel_gpu_reset(struct drm_device *dev, unsigned engine_mask)
1732 {
1733         struct drm_i915_private *dev_priv = to_i915(dev);
1734         int (*reset)(struct drm_device *, unsigned);
1735         int ret;
1736
1737         reset = intel_get_gpu_reset(dev);
1738         if (reset == NULL)
1739                 return -ENODEV;
1740
1741         /* If the power well sleeps during the reset, the reset
1742          * request may be dropped and never completes (causing -EIO).
1743          */
1744         intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
1745         ret = reset(dev, engine_mask);
1746         intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
1747
1748         return ret;
1749 }
1750
1751 bool intel_has_gpu_reset(struct drm_device *dev)
1752 {
1753         return intel_get_gpu_reset(dev) != NULL;
1754 }
1755
1756 int intel_guc_reset(struct drm_i915_private *dev_priv)
1757 {
1758         int ret;
1759         unsigned long irqflags;
1760
1761         if (!i915.enable_guc_submission)
1762                 return -EINVAL;
1763
1764         intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
1765         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
1766
1767         ret = gen6_hw_domain_reset(dev_priv, GEN9_GRDOM_GUC);
1768
1769         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
1770         intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
1771
1772         return ret;
1773 }
1774
1775 bool intel_uncore_unclaimed_mmio(struct drm_i915_private *dev_priv)
1776 {
1777         return check_for_unclaimed_mmio(dev_priv);
1778 }
1779
1780 bool
1781 intel_uncore_arm_unclaimed_mmio_detection(struct drm_i915_private *dev_priv)
1782 {
1783         if (unlikely(i915.mmio_debug ||
1784                      dev_priv->uncore.unclaimed_mmio_check <= 0))
1785                 return false;
1786
1787         if (unlikely(intel_uncore_unclaimed_mmio(dev_priv))) {
1788                 DRM_DEBUG("Unclaimed register detected, "
1789                           "enabling oneshot unclaimed register reporting. "
1790                           "Please use i915.mmio_debug=N for more information.\n");
1791                 i915.mmio_debug++;
1792                 dev_priv->uncore.unclaimed_mmio_check--;
1793                 return true;
1794         }
1795
1796         return false;
1797 }
1798
1799 static enum forcewake_domains
1800 intel_uncore_forcewake_for_read(struct drm_i915_private *dev_priv,
1801                                 i915_reg_t reg)
1802 {
1803         enum forcewake_domains fw_domains;
1804
1805         if (intel_vgpu_active(dev_priv->dev))
1806                 return 0;
1807
1808         switch (INTEL_INFO(dev_priv)->gen) {
1809         case 9:
1810                 fw_domains = __gen9_reg_read_fw_domains(i915_mmio_reg_offset(reg));
1811                 break;
1812         case 8:
1813                 if (IS_CHERRYVIEW(dev_priv))
1814                         fw_domains = __chv_reg_read_fw_domains(i915_mmio_reg_offset(reg));
1815                 else
1816                         fw_domains = __gen6_reg_read_fw_domains(i915_mmio_reg_offset(reg));
1817                 break;
1818         case 7:
1819         case 6:
1820                 if (IS_VALLEYVIEW(dev_priv))
1821                         fw_domains = __vlv_reg_read_fw_domains(i915_mmio_reg_offset(reg));
1822                 else
1823                         fw_domains = __gen6_reg_read_fw_domains(i915_mmio_reg_offset(reg));
1824                 break;
1825         default:
1826                 MISSING_CASE(INTEL_INFO(dev_priv)->gen);
1827         case 5: /* forcewake was introduced with gen6 */
1828         case 4:
1829         case 3:
1830         case 2:
1831                 return 0;
1832         }
1833
1834         WARN_ON(fw_domains & ~dev_priv->uncore.fw_domains);
1835
1836         return fw_domains;
1837 }
1838
1839 static enum forcewake_domains
1840 intel_uncore_forcewake_for_write(struct drm_i915_private *dev_priv,
1841                                  i915_reg_t reg)
1842 {
1843         enum forcewake_domains fw_domains;
1844
1845         if (intel_vgpu_active(dev_priv->dev))
1846                 return 0;
1847
1848         switch (INTEL_INFO(dev_priv)->gen) {
1849         case 9:
1850                 fw_domains = __gen9_reg_write_fw_domains(i915_mmio_reg_offset(reg));
1851                 break;
1852         case 8:
1853                 if (IS_CHERRYVIEW(dev_priv))
1854                         fw_domains = __chv_reg_write_fw_domains(i915_mmio_reg_offset(reg));
1855                 else
1856                         fw_domains = __gen8_reg_write_fw_domains(i915_mmio_reg_offset(reg));
1857                 break;
1858         case 7:
1859         case 6:
1860                 fw_domains = FORCEWAKE_RENDER;
1861                 break;
1862         default:
1863                 MISSING_CASE(INTEL_INFO(dev_priv)->gen);
1864         case 5:
1865         case 4:
1866         case 3:
1867         case 2:
1868                 return 0;
1869         }
1870
1871         WARN_ON(fw_domains & ~dev_priv->uncore.fw_domains);
1872
1873         return fw_domains;
1874 }
1875
1876 /**
1877  * intel_uncore_forcewake_for_reg - which forcewake domains are needed to access
1878  *                                  a register
1879  * @dev_priv: pointer to struct drm_i915_private
1880  * @reg: register in question
1881  * @op: operation bitmask of FW_REG_READ and/or FW_REG_WRITE
1882  *
1883  * Returns a set of forcewake domains required to be taken with for example
1884  * intel_uncore_forcewake_get for the specified register to be accessible in the
1885  * specified mode (read, write or read/write) with raw mmio accessors.
1886  *
1887  * NOTE: On Gen6 and Gen7 write forcewake domain (FORCEWAKE_RENDER) requires the
1888  * callers to do FIFO management on their own or risk losing writes.
1889  */
1890 enum forcewake_domains
1891 intel_uncore_forcewake_for_reg(struct drm_i915_private *dev_priv,
1892                                i915_reg_t reg, unsigned int op)
1893 {
1894         enum forcewake_domains fw_domains = 0;
1895
1896         WARN_ON(!op);
1897
1898         if (op & FW_REG_READ)
1899                 fw_domains = intel_uncore_forcewake_for_read(dev_priv, reg);
1900
1901         if (op & FW_REG_WRITE)
1902                 fw_domains |= intel_uncore_forcewake_for_write(dev_priv, reg);
1903
1904         return fw_domains;
1905 }