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_i915_read8(dev_priv__, reg__) readb((dev_priv__)->regs + (reg__))
  31 #define __raw_i915_write8(dev_priv__, reg__, val__) writeb(val__, (dev_priv__)->regs + (reg__))
  32
  33 #define __raw_i915_read16(dev_priv__, reg__) readw((dev_priv__)->regs + (reg__))
  34 #define __raw_i915_write16(dev_priv__, reg__, val__) writew(val__, (dev_priv__)->regs + (reg__))
  35
  36 #define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
  37 #define __raw_i915_write32(dev_priv__, reg__, val__) writel(val__, (dev_priv__)->regs + (reg__))
  38
  39 #define __raw_i915_read64(dev_priv__, reg__) readq((dev_priv__)->regs + (reg__))
  40 #define __raw_i915_write64(dev_priv__, reg__, val__) writeq(val__, (dev_priv__)->regs + (reg__))
  41
  42 #define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32(dev_priv__, reg__)
  43
  44 static const char * const forcewake_domain_names[] = {
  45         "render",
  46         "blitter",
  47         "media",
  48 };
  49
  50 const char *
  51 intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id)
  52 {
  53         BUILD_BUG_ON(ARRAY_SIZE(forcewake_domain_names) != FW_DOMAIN_ID_COUNT);
  54
  55         if (id >= 0 && id < FW_DOMAIN_ID_COUNT)
  56                 return forcewake_domain_names[id];
  57
  58         WARN_ON(id);
  59
  60         return "unknown";
  61 }
  62
  63 static void
  64 assert_device_not_suspended(struct drm_i915_private *dev_priv)
  65 {
  66         WARN_ONCE(HAS_RUNTIME_PM(dev_priv->dev) && dev_priv->pm.suspended,
  67                   "Device suspended\n");
  68 }
  69
  70 static inline void
  71 fw_domain_reset(const struct intel_uncore_forcewake_domain *d)
  72 {
  73         WARN_ON(d->reg_set == 0);
  74         __raw_i915_write32(d->i915, d->reg_set, d->val_reset);
  75 }
  76
  77 static inline void
  78 fw_domain_arm_timer(struct intel_uncore_forcewake_domain *d)
  79 {
  80         mod_timer_pinned(&d->timer, jiffies + 1);
  81 }
  82
  83 static inline void
  84 fw_domain_wait_ack_clear(const struct intel_uncore_forcewake_domain *d)
  85 {
  86         if (wait_for_atomic((__raw_i915_read32(d->i915, d->reg_ack) &
  87                              FORCEWAKE_KERNEL) == 0,
  88                             FORCEWAKE_ACK_TIMEOUT_MS))
  89                 DRM_ERROR("%s: timed out waiting for forcewake ack to clear.\n",
  90                           intel_uncore_forcewake_domain_to_str(d->id));
  91 }
  92
  93 static inline void
  94 fw_domain_get(const struct intel_uncore_forcewake_domain *d)
  95 {
  96         __raw_i915_write32(d->i915, d->reg_set, d->val_set);
  97 }
  98
  99 static inline void
 100 fw_domain_wait_ack(const struct intel_uncore_forcewake_domain *d)
 101 {
 102         if (wait_for_atomic((__raw_i915_read32(d->i915, d->reg_ack) &
 103                              FORCEWAKE_KERNEL),
 104                             FORCEWAKE_ACK_TIMEOUT_MS))
 105                 DRM_ERROR("%s: timed out waiting for forcewake ack request.\n",
 106                           intel_uncore_forcewake_domain_to_str(d->id));
 107 }
 108
 109 static inline void
 110 fw_domain_put(const struct intel_uncore_forcewake_domain *d)
 111 {
 112         __raw_i915_write32(d->i915, d->reg_set, d->val_clear);
 113 }
 114
 115 static inline void
 116 fw_domain_posting_read(const struct intel_uncore_forcewake_domain *d)
 117 {
 118         /* something from same cacheline, but not from the set register */
 119         if (d->reg_post)
 120                 __raw_posting_read(d->i915, d->reg_post);
 121 }
 122
 123 static void
 124 fw_domains_get(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains)
 125 {
 126         struct intel_uncore_forcewake_domain *d;
 127         enum forcewake_domain_id id;
 128
 129         for_each_fw_domain_mask(d, fw_domains, dev_priv, id) {
 130                 fw_domain_wait_ack_clear(d);
 131                 fw_domain_get(d);
 132                 fw_domain_wait_ack(d);
 133         }
 134 }
 135
 136 static void
 137 fw_domains_put(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains)
 138 {
 139         struct intel_uncore_forcewake_domain *d;
 140         enum forcewake_domain_id id;
 141
 142         for_each_fw_domain_mask(d, fw_domains, dev_priv, id) {
 143                 fw_domain_put(d);
 144                 fw_domain_posting_read(d);
 145         }
 146 }
 147
 148 static void
 149 fw_domains_posting_read(struct drm_i915_private *dev_priv)
 150 {
 151         struct intel_uncore_forcewake_domain *d;
 152         enum forcewake_domain_id id;
 153
 154         /* No need to do for all, just do for first found */
 155         for_each_fw_domain(d, dev_priv, id) {
 156                 fw_domain_posting_read(d);
 157                 break;
 158         }
 159 }
 160
 161 static void
 162 fw_domains_reset(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains)
 163 {
 164         struct intel_uncore_forcewake_domain *d;
 165         enum forcewake_domain_id id;
 166
 167         if (dev_priv->uncore.fw_domains == 0)
 168                 return;
 169
 170         for_each_fw_domain_mask(d, fw_domains, dev_priv, id)
 171                 fw_domain_reset(d);
 172
 173         fw_domains_posting_read(dev_priv);
 174 }
 175
 176 static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
 177 {
 178         /* w/a for a sporadic read returning 0 by waiting for the GT
 179          * thread to wake up.
 180          */
 181         if (wait_for_atomic_us((__raw_i915_read32(dev_priv, GEN6_GT_THREAD_STATUS_REG) &
 182                                 GEN6_GT_THREAD_STATUS_CORE_MASK) == 0, 500))
 183                 DRM_ERROR("GT thread status wait timed out\n");
 184 }
 185
 186 static void fw_domains_get_with_thread_status(struct drm_i915_private *dev_priv,
 187                                               enum forcewake_domains fw_domains)
 188 {
 189         fw_domains_get(dev_priv, fw_domains);
 190
 191         /* WaRsForcewakeWaitTC0:snb,ivb,hsw,bdw,vlv */
 192         __gen6_gt_wait_for_thread_c0(dev_priv);
 193 }
 194
 195 static void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
 196 {
 197         u32 gtfifodbg;
 198
 199         gtfifodbg = __raw_i915_read32(dev_priv, GTFIFODBG);
 200         if (WARN(gtfifodbg, "GT wake FIFO error 0x%x\n", gtfifodbg))
 201                 __raw_i915_write32(dev_priv, GTFIFODBG, gtfifodbg);
 202 }
 203
 204 static void fw_domains_put_with_fifo(struct drm_i915_private *dev_priv,
 205                                      enum forcewake_domains fw_domains)
 206 {
 207         fw_domains_put(dev_priv, fw_domains);
 208         gen6_gt_check_fifodbg(dev_priv);
 209 }
 210
 211 static inline u32 fifo_free_entries(struct drm_i915_private *dev_priv)
 212 {
 213         u32 count = __raw_i915_read32(dev_priv, GTFIFOCTL);
 214
 215         return count & GT_FIFO_FREE_ENTRIES_MASK;
 216 }
 217
 218 static int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
 219 {
 220         int ret = 0;
 221
 222         /* On VLV, FIFO will be shared by both SW and HW.
 223          * So, we need to read the FREE_ENTRIES everytime */
 224         if (IS_VALLEYVIEW(dev_priv->dev))
 225                 dev_priv->uncore.fifo_count = fifo_free_entries(dev_priv);
 226
 227         if (dev_priv->uncore.fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {
 228                 int loop = 500;
 229                 u32 fifo = fifo_free_entries(dev_priv);
 230
 231                 while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
 232                         udelay(10);
 233                         fifo = fifo_free_entries(dev_priv);
 234                 }
 235                 if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES))
 236                         ++ret;
 237                 dev_priv->uncore.fifo_count = fifo;
 238         }
 239         dev_priv->uncore.fifo_count--;
 240
 241         return ret;
 242 }
 243
 244 static void intel_uncore_fw_release_timer(unsigned long arg)
 245 {
 246         struct intel_uncore_forcewake_domain *domain = (void *)arg;
 247         unsigned long irqflags;
 248
 249         assert_device_not_suspended(domain->i915);
 250
 251         spin_lock_irqsave(&domain->i915->uncore.lock, irqflags);
 252         if (WARN_ON(domain->wake_count == 0))
 253                 domain->wake_count++;
 254
 255         if (--domain->wake_count == 0)
 256                 domain->i915->uncore.funcs.force_wake_put(domain->i915,
 257                                                           1 << domain->id);
 258
 259         spin_unlock_irqrestore(&domain->i915->uncore.lock, irqflags);
 260 }
 261
 262 void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
 263 {
 264         struct drm_i915_private *dev_priv = dev->dev_private;
 265         unsigned long irqflags;
 266         struct intel_uncore_forcewake_domain *domain;
 267         int retry_count = 100;
 268         enum forcewake_domain_id id;
 269         enum forcewake_domains fw = 0, active_domains;
 270
 271         /* Hold uncore.lock across reset to prevent any register access
 272          * with forcewake not set correctly. Wait until all pending
 273          * timers are run before holding.
 274          */
 275         while (1) {
 276                 active_domains = 0;
 277
 278                 for_each_fw_domain(domain, dev_priv, id) {
 279                         if (del_timer_sync(&domain->timer) == 0)
 280                                 continue;
 281
 282                         intel_uncore_fw_release_timer((unsigned long)domain);
 283                 }
 284
 285                 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 286
 287                 for_each_fw_domain(domain, dev_priv, id) {
 288                         if (timer_pending(&domain->timer))
 289                                 active_domains |= (1 << id);
 290                 }
 291
 292                 if (active_domains == 0)
 293                         break;
 294
 295                 if (--retry_count == 0) {
 296                         DRM_ERROR("Timed out waiting for forcewake timers to finish\n");
 297                         break;
 298                 }
 299
 300                 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 301 #if 0
 302                 cond_resched();
 303 #endif
 304         }
 305
 306         WARN_ON(active_domains);
 307
 308         for_each_fw_domain(domain, dev_priv, id)
 309                 if (domain->wake_count)
 310                         fw |= 1 << id;
 311
 312         if (fw)
 313                 dev_priv->uncore.funcs.force_wake_put(dev_priv, fw);
 314
 315         fw_domains_reset(dev_priv, FORCEWAKE_ALL);
 316
 317         if (restore) { /* If reset with a user forcewake, try to restore */
 318                 if (fw)
 319                         dev_priv->uncore.funcs.force_wake_get(dev_priv, fw);
 320
 321                 if (IS_GEN6(dev) || IS_GEN7(dev))
 322                         dev_priv->uncore.fifo_count =
 323                                 fifo_free_entries(dev_priv);
 324         }
 325
 326         if (!restore)
 327                 assert_forcewakes_inactive(dev_priv);
 328
 329         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 330 }
 331
 332 static void intel_uncore_ellc_detect(struct drm_device *dev)
 333 {
 334         struct drm_i915_private *dev_priv = dev->dev_private;
 335
 336         if ((IS_HASWELL(dev) || IS_BROADWELL(dev) ||
 337              INTEL_INFO(dev)->gen >= 9) &&
 338             (__raw_i915_read32(dev_priv, HSW_EDRAM_PRESENT) & EDRAM_ENABLED)) {
 339                 /* The docs do not explain exactly how the calculation can be
 340                  * made. It is somewhat guessable, but for now, it's always
 341                  * 128MB.
 342                  * NB: We can't write IDICR yet because we do not have gt funcs
 343                  * set up */
 344                 dev_priv->ellc_size = 128;
 345                 DRM_INFO("Found %zuMB of eLLC\n", dev_priv->ellc_size);
 346         }
 347 }
 348
 349 static void __intel_uncore_early_sanitize(struct drm_device *dev,
 350                                           bool restore_forcewake)
 351 {
 352         struct drm_i915_private *dev_priv = dev->dev_private;
 353
 354         if (HAS_FPGA_DBG_UNCLAIMED(dev))
 355                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 356
 357         /* clear out old GT FIFO errors */
 358         if (IS_GEN6(dev) || IS_GEN7(dev))
 359                 __raw_i915_write32(dev_priv, GTFIFODBG,
 360                                    __raw_i915_read32(dev_priv, GTFIFODBG));
 361
 362         /* WaDisableShadowRegForCpd:chv */
 363         if (IS_CHERRYVIEW(dev)) {
 364                 __raw_i915_write32(dev_priv, GTFIFOCTL,
 365                                    __raw_i915_read32(dev_priv, GTFIFOCTL) |
 366                                    GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL |
 367                                    GT_FIFO_CTL_RC6_POLICY_STALL);
 368         }
 369
 370         intel_uncore_forcewake_reset(dev, restore_forcewake);
 371 }
 372
 373 void intel_uncore_early_sanitize(struct drm_device *dev, bool restore_forcewake)
 374 {
 375         __intel_uncore_early_sanitize(dev, restore_forcewake);
 376         i915_check_and_clear_faults(dev);
 377 }
 378
 379 void intel_uncore_sanitize(struct drm_device *dev)
 380 {
 381         /* BIOS often leaves RC6 enabled, but disable it for hw init */
 382         intel_disable_gt_powersave(dev);
 383 }
 384
 385 static void __intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
 386                                          enum forcewake_domains fw_domains)
 387 {
 388         struct intel_uncore_forcewake_domain *domain;
 389         enum forcewake_domain_id id;
 390
 391         if (!dev_priv->uncore.funcs.force_wake_get)
 392                 return;
 393
 394         fw_domains &= dev_priv->uncore.fw_domains;
 395
 396         for_each_fw_domain_mask(domain, fw_domains, dev_priv, id) {
 397                 if (domain->wake_count++)
 398                         fw_domains &= ~(1 << id);
 399         }
 400
 401         if (fw_domains)
 402                 dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
 403 }
 404
 405 /**
 406  * intel_uncore_forcewake_get - grab forcewake domain references
 407  * @dev_priv: i915 device instance
 408  * @fw_domains: forcewake domains to get reference on
 409  *
 410  * This function can be used get GT's forcewake domain references.
 411  * Normal register access will handle the forcewake domains automatically.
 412  * However if some sequence requires the GT to not power down a particular
 413  * forcewake domains this function should be called at the beginning of the
 414  * sequence. And subsequently the reference should be dropped by symmetric
 415  * call to intel_unforce_forcewake_put(). Usually caller wants all the domains
 416  * to be kept awake so the @fw_domains would be then FORCEWAKE_ALL.
 417  */
 418 void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
 419                                 enum forcewake_domains fw_domains)
 420 {
 421         unsigned long irqflags;
 422
 423         if (!dev_priv->uncore.funcs.force_wake_get)
 424                 return;
 425
 426         WARN_ON(dev_priv->pm.suspended);
 427
 428         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 429         __intel_uncore_forcewake_get(dev_priv, fw_domains);
 430         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 431 }
 432
 433 /**
 434  * intel_uncore_forcewake_get__locked - grab forcewake domain references
 435  * @dev_priv: i915 device instance
 436  * @fw_domains: forcewake domains to get reference on
 437  *
 438  * See intel_uncore_forcewake_get(). This variant places the onus
 439  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
 440  */
 441 void intel_uncore_forcewake_get__locked(struct drm_i915_private *dev_priv,
 442                                         enum forcewake_domains fw_domains)
 443 {
 444         assert_spin_locked(&dev_priv->uncore.lock);
 445
 446         if (!dev_priv->uncore.funcs.force_wake_get)
 447                 return;
 448
 449         __intel_uncore_forcewake_get(dev_priv, fw_domains);
 450 }
 451
 452 static void __intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
 453                                          enum forcewake_domains fw_domains)
 454 {
 455         struct intel_uncore_forcewake_domain *domain;
 456         enum forcewake_domain_id id;
 457
 458         if (!dev_priv->uncore.funcs.force_wake_put)
 459                 return;
 460
 461         fw_domains &= dev_priv->uncore.fw_domains;
 462
 463         for_each_fw_domain_mask(domain, fw_domains, dev_priv, id) {
 464                 if (WARN_ON(domain->wake_count == 0))
 465                         continue;
 466
 467                 if (--domain->wake_count)
 468                         continue;
 469
 470                 domain->wake_count++;
 471                 fw_domain_arm_timer(domain);
 472         }
 473 }
 474
 475 /**
 476  * intel_uncore_forcewake_put - release a forcewake domain reference
 477  * @dev_priv: i915 device instance
 478  * @fw_domains: forcewake domains to put references
 479  *
 480  * This function drops the device-level forcewakes for specified
 481  * domains obtained by intel_uncore_forcewake_get().
 482  */
 483 void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
 484                                 enum forcewake_domains fw_domains)
 485 {
 486         unsigned long irqflags;
 487
 488         if (!dev_priv->uncore.funcs.force_wake_put)
 489                 return;
 490
 491         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 492         __intel_uncore_forcewake_put(dev_priv, fw_domains);
 493         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 494 }
 495
 496 /**
 497  * intel_uncore_forcewake_put__locked - grab forcewake domain references
 498  * @dev_priv: i915 device instance
 499  * @fw_domains: forcewake domains to get reference on
 500  *
 501  * See intel_uncore_forcewake_put(). This variant places the onus
 502  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
 503  */
 504 void intel_uncore_forcewake_put__locked(struct drm_i915_private *dev_priv,
 505                                         enum forcewake_domains fw_domains)
 506 {
 507         assert_spin_locked(&dev_priv->uncore.lock);
 508
 509         if (!dev_priv->uncore.funcs.force_wake_put)
 510                 return;
 511
 512         __intel_uncore_forcewake_put(dev_priv, fw_domains);
 513 }
 514
 515 void assert_forcewakes_inactive(struct drm_i915_private *dev_priv)
 516 {
 517         struct intel_uncore_forcewake_domain *domain;
 518         enum forcewake_domain_id id;
 519
 520         if (!dev_priv->uncore.funcs.force_wake_get)
 521                 return;
 522
 523         for_each_fw_domain(domain, dev_priv, id)
 524                 WARN_ON(domain->wake_count);
 525 }
 526
 527 /* We give fast paths for the really cool registers */
 528 #define NEEDS_FORCE_WAKE(reg) \
 529          ((reg) < 0x40000 && (reg) != FORCEWAKE)
 530
 531 #define REG_RANGE(reg, start, end) ((reg) >= (start) && (reg) < (end))
 532
 533 #define FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg) \
 534         (REG_RANGE((reg), 0x2000, 0x4000) || \
 535          REG_RANGE((reg), 0x5000, 0x8000) || \
 536          REG_RANGE((reg), 0xB000, 0x12000) || \
 537          REG_RANGE((reg), 0x2E000, 0x30000))
 538
 539 #define FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg) \
 540         (REG_RANGE((reg), 0x12000, 0x14000) || \
 541          REG_RANGE((reg), 0x22000, 0x24000) || \
 542          REG_RANGE((reg), 0x30000, 0x40000))
 543
 544 #define FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg) \
 545         (REG_RANGE((reg), 0x2000, 0x4000) || \
 546          REG_RANGE((reg), 0x5200, 0x8000) || \
 547          REG_RANGE((reg), 0x8300, 0x8500) || \
 548          REG_RANGE((reg), 0xB000, 0xB480) || \
 549          REG_RANGE((reg), 0xE000, 0xE800))
 550
 551 #define FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg) \
 552         (REG_RANGE((reg), 0x8800, 0x8900) || \
 553          REG_RANGE((reg), 0xD000, 0xD800) || \
 554          REG_RANGE((reg), 0x12000, 0x14000) || \
 555          REG_RANGE((reg), 0x1A000, 0x1C000) || \
 556          REG_RANGE((reg), 0x1E800, 0x1EA00) || \
 557          REG_RANGE((reg), 0x30000, 0x38000))
 558
 559 #define FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg) \
 560         (REG_RANGE((reg), 0x4000, 0x5000) || \
 561          REG_RANGE((reg), 0x8000, 0x8300) || \
 562          REG_RANGE((reg), 0x8500, 0x8600) || \
 563          REG_RANGE((reg), 0x9000, 0xB000) || \
 564          REG_RANGE((reg), 0xF000, 0x10000))
 565
 566 #define FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) \
 567         REG_RANGE((reg), 0xB00,  0x2000)
 568
 569 #define FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) \
 570         (REG_RANGE((reg), 0x2000, 0x2700) || \
 571          REG_RANGE((reg), 0x3000, 0x4000) || \
 572          REG_RANGE((reg), 0x5200, 0x8000) || \
 573          REG_RANGE((reg), 0x8140, 0x8160) || \
 574          REG_RANGE((reg), 0x8300, 0x8500) || \
 575          REG_RANGE((reg), 0x8C00, 0x8D00) || \
 576          REG_RANGE((reg), 0xB000, 0xB480) || \
 577          REG_RANGE((reg), 0xE000, 0xE900) || \
 578          REG_RANGE((reg), 0x24400, 0x24800))
 579
 580 #define FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) \
 581         (REG_RANGE((reg), 0x8130, 0x8140) || \
 582          REG_RANGE((reg), 0x8800, 0x8A00) || \
 583          REG_RANGE((reg), 0xD000, 0xD800) || \
 584          REG_RANGE((reg), 0x12000, 0x14000) || \
 585          REG_RANGE((reg), 0x1A000, 0x1EA00) || \
 586          REG_RANGE((reg), 0x30000, 0x40000))
 587
 588 #define FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg) \
 589         REG_RANGE((reg), 0x9400, 0x9800)
 590
 591 #define FORCEWAKE_GEN9_BLITTER_RANGE_OFFSET(reg) \
 592         ((reg) < 0x40000 &&\
 593          !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) && \
 594          !FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) && \
 595          !FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) && \
 596          !FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg))
 597
 598 static void
 599 ilk_dummy_write(struct drm_i915_private *dev_priv)
 600 {
 601         /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
 602          * the chip from rc6 before touching it for real. MI_MODE is masked,
 603          * hence harmless to write 0 into. */
 604         __raw_i915_write32(dev_priv, MI_MODE, 0);
 605 }
 606
 607 static void
 608 hsw_unclaimed_reg_debug(struct drm_i915_private *dev_priv, u32 reg, bool read,
 609                         bool before)
 610 {
 611         const char *op = read ? "reading" : "writing to";
 612         const char *when = before ? "before" : "after";
 613
 614         if (!i915.mmio_debug)
 615                 return;
 616
 617         if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) {
 618                 WARN(1, "Unclaimed register detected %s %s register 0x%x\n",
 619                      when, op, reg);
 620                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 621                 i915.mmio_debug--; /* Only report the first N failures */
 622         }
 623 }
 624
 625 static void
 626 hsw_unclaimed_reg_detect(struct drm_i915_private *dev_priv)
 627 {
 628         static bool mmio_debug_once = true;
 629
 630         if (i915.mmio_debug || !mmio_debug_once)
 631                 return;
 632
 633         if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) {
 634                 DRM_DEBUG("Unclaimed register detected, "
 635                           "enabling oneshot unclaimed register reporting. "
 636                           "Please use i915.mmio_debug=N for more information.\n");
 637                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 638                 i915.mmio_debug = mmio_debug_once--;
 639         }
 640 }
 641
 642 #define GEN2_READ_HEADER(x) \
 643         u##x val = 0; \
 644         assert_device_not_suspended(dev_priv);
 645
 646 #define GEN2_READ_FOOTER \
 647         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
 648         return val
 649
 650 #define __gen2_read(x) \
 651 static u##x \
 652 gen2_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 653         GEN2_READ_HEADER(x); \
 654         val = __raw_i915_read##x(dev_priv, reg); \
 655         GEN2_READ_FOOTER; \
 656 }
 657
 658 #define __gen5_read(x) \
 659 static u##x \
 660 gen5_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 661         GEN2_READ_HEADER(x); \
 662         ilk_dummy_write(dev_priv); \
 663         val = __raw_i915_read##x(dev_priv, reg); \
 664         GEN2_READ_FOOTER; \
 665 }
 666
 667 __gen5_read(8)
 668 __gen5_read(16)
 669 __gen5_read(32)
 670 __gen5_read(64)
 671 __gen2_read(8)
 672 __gen2_read(16)
 673 __gen2_read(32)
 674 __gen2_read(64)
 675
 676 #undef __gen5_read
 677 #undef __gen2_read
 678
 679 #undef GEN2_READ_FOOTER
 680 #undef GEN2_READ_HEADER
 681
 682 #define GEN6_READ_HEADER(x) \
 683         unsigned long irqflags; \
 684         u##x val = 0; \
 685         assert_device_not_suspended(dev_priv); \
 686         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
 687
 688 #define GEN6_READ_FOOTER \
 689         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
 690         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
 691         return val
 692
 693 static inline void __force_wake_get(struct drm_i915_private *dev_priv,
 694                                     enum forcewake_domains fw_domains)
 695 {
 696         struct intel_uncore_forcewake_domain *domain;
 697         enum forcewake_domain_id id;
 698
 699         if (WARN_ON(!fw_domains))
 700                 return;
 701
 702         /* Ideally GCC would be constant-fold and eliminate this loop */
 703         for_each_fw_domain_mask(domain, fw_domains, dev_priv, id) {
 704                 if (domain->wake_count) {
 705                         fw_domains &= ~(1 << id);
 706                         continue;
 707                 }
 708
 709                 domain->wake_count++;
 710                 fw_domain_arm_timer(domain);
 711         }
 712
 713         if (fw_domains)
 714                 dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
 715 }
 716
 717 #define __vgpu_read(x) \
 718 static u##x \
 719 vgpu_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 720         GEN6_READ_HEADER(x); \
 721         val = __raw_i915_read##x(dev_priv, reg); \
 722         GEN6_READ_FOOTER; \
 723 }
 724
 725 #define __gen6_read(x) \
 726 static u##x \
 727 gen6_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 728         GEN6_READ_HEADER(x); \
 729         hsw_unclaimed_reg_debug(dev_priv, reg, true, true); \
 730         if (NEEDS_FORCE_WAKE(reg)) \
 731                 __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
 732         val = __raw_i915_read##x(dev_priv, reg); \
 733         hsw_unclaimed_reg_debug(dev_priv, reg, true, false); \
 734         GEN6_READ_FOOTER; \
 735 }
 736
 737 #define __vlv_read(x) \
 738 static u##x \
 739 vlv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 740         GEN6_READ_HEADER(x); \
 741         if (FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg)) \
 742                 __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
 743         else if (FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg)) \
 744                 __force_wake_get(dev_priv, FORCEWAKE_MEDIA); \
 745         val = __raw_i915_read##x(dev_priv, reg); \
 746         GEN6_READ_FOOTER; \
 747 }
 748
 749 #define __chv_read(x) \
 750 static u##x \
 751 chv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 752         GEN6_READ_HEADER(x); \
 753         if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) \
 754                 __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
 755         else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) \
 756                 __force_wake_get(dev_priv, FORCEWAKE_MEDIA); \
 757         else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) \
 758                 __force_wake_get(dev_priv, \
 759                                  FORCEWAKE_RENDER | FORCEWAKE_MEDIA); \
 760         val = __raw_i915_read##x(dev_priv, reg); \
 761         GEN6_READ_FOOTER; \
 762 }
 763
 764 #define SKL_NEEDS_FORCE_WAKE(reg) \
 765          ((reg) < 0x40000 && !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg))
 766
 767 #define __gen9_read(x) \
 768 static u##x \
 769 gen9_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 770         enum forcewake_domains fw_engine; \
 771         GEN6_READ_HEADER(x); \
 772         hsw_unclaimed_reg_debug(dev_priv, reg, true, true); \
 773         if (!SKL_NEEDS_FORCE_WAKE(reg)) \
 774                 fw_engine = 0; \
 775         else if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg)) \
 776                 fw_engine = FORCEWAKE_RENDER; \
 777         else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg)) \
 778                 fw_engine = FORCEWAKE_MEDIA; \
 779         else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) \
 780                 fw_engine = FORCEWAKE_RENDER | FORCEWAKE_MEDIA; \
 781         else \
 782                 fw_engine = FORCEWAKE_BLITTER; \
 783         if (fw_engine) \
 784                 __force_wake_get(dev_priv, fw_engine); \
 785         val = __raw_i915_read##x(dev_priv, reg); \
 786         hsw_unclaimed_reg_debug(dev_priv, reg, true, false); \
 787         GEN6_READ_FOOTER; \
 788 }
 789
 790 __vgpu_read(8)
 791 __vgpu_read(16)
 792 __vgpu_read(32)
 793 __vgpu_read(64)
 794 __gen9_read(8)
 795 __gen9_read(16)
 796 __gen9_read(32)
 797 __gen9_read(64)
 798 __chv_read(8)
 799 __chv_read(16)
 800 __chv_read(32)
 801 __chv_read(64)
 802 __vlv_read(8)
 803 __vlv_read(16)
 804 __vlv_read(32)
 805 __vlv_read(64)
 806 __gen6_read(8)
 807 __gen6_read(16)
 808 __gen6_read(32)
 809 __gen6_read(64)
 810
 811 #undef __gen9_read
 812 #undef __chv_read
 813 #undef __vlv_read
 814 #undef __gen6_read
 815 #undef __vgpu_read
 816 #undef GEN6_READ_FOOTER
 817 #undef GEN6_READ_HEADER
 818
 819 #define GEN2_WRITE_HEADER \
 820         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
 821         assert_device_not_suspended(dev_priv); \
 822
 823 #define GEN2_WRITE_FOOTER
 824
 825 #define __gen2_write(x) \
 826 static void \
 827 gen2_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 828         GEN2_WRITE_HEADER; \
 829         __raw_i915_write##x(dev_priv, reg, val); \
 830         GEN2_WRITE_FOOTER; \
 831 }
 832
 833 #define __gen5_write(x) \
 834 static void \
 835 gen5_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 836         GEN2_WRITE_HEADER; \
 837         ilk_dummy_write(dev_priv); \
 838         __raw_i915_write##x(dev_priv, reg, val); \
 839         GEN2_WRITE_FOOTER; \
 840 }
 841
 842 __gen5_write(8)
 843 __gen5_write(16)
 844 __gen5_write(32)
 845 __gen5_write(64)
 846 __gen2_write(8)
 847 __gen2_write(16)
 848 __gen2_write(32)
 849 __gen2_write(64)
 850
 851 #undef __gen5_write
 852 #undef __gen2_write
 853
 854 #undef GEN2_WRITE_FOOTER
 855 #undef GEN2_WRITE_HEADER
 856
 857 #define GEN6_WRITE_HEADER \
 858         unsigned long irqflags; \
 859         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
 860         assert_device_not_suspended(dev_priv); \
 861         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
 862
 863 #define GEN6_WRITE_FOOTER \
 864         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags)
 865
 866 #define __gen6_write(x) \
 867 static void \
 868 gen6_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 869         u32 __fifo_ret = 0; \
 870         GEN6_WRITE_HEADER; \
 871         if (NEEDS_FORCE_WAKE(reg)) { \
 872                 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
 873         } \
 874         __raw_i915_write##x(dev_priv, reg, val); \
 875         if (unlikely(__fifo_ret)) { \
 876                 gen6_gt_check_fifodbg(dev_priv); \
 877         } \
 878         GEN6_WRITE_FOOTER; \
 879 }
 880
 881 #define __hsw_write(x) \
 882 static void \
 883 hsw_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 884         u32 __fifo_ret = 0; \
 885         GEN6_WRITE_HEADER; \
 886         if (NEEDS_FORCE_WAKE(reg)) { \
 887                 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
 888         } \
 889         hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \
 890         __raw_i915_write##x(dev_priv, reg, val); \
 891         if (unlikely(__fifo_ret)) { \
 892                 gen6_gt_check_fifodbg(dev_priv); \
 893         } \
 894         hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \
 895         hsw_unclaimed_reg_detect(dev_priv); \
 896         GEN6_WRITE_FOOTER; \
 897 }
 898
 899 #define __vgpu_write(x) \
 900 static void vgpu_write##x(struct drm_i915_private *dev_priv, \
 901                           off_t reg, u##x val, bool trace) { \
 902         GEN6_WRITE_HEADER; \
 903         __raw_i915_write##x(dev_priv, reg, val); \
 904         GEN6_WRITE_FOOTER; \
 905 }
 906
 907 static const u32 gen8_shadowed_regs[] = {
 908         FORCEWAKE_MT,
 909         GEN6_RPNSWREQ,
 910         GEN6_RC_VIDEO_FREQ,
 911         RING_TAIL(RENDER_RING_BASE),
 912         RING_TAIL(GEN6_BSD_RING_BASE),
 913         RING_TAIL(VEBOX_RING_BASE),
 914         RING_TAIL(BLT_RING_BASE),
 915         /* TODO: Other registers are not yet used */
 916 };
 917
 918 static bool is_gen8_shadowed(struct drm_i915_private *dev_priv, u32 reg)
 919 {
 920         int i;
 921         for (i = 0; i < ARRAY_SIZE(gen8_shadowed_regs); i++)
 922                 if (reg == gen8_shadowed_regs[i])
 923                         return true;
 924
 925         return false;
 926 }
 927
 928 #define __gen8_write(x) \
 929 static void \
 930 gen8_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 931         GEN6_WRITE_HEADER; \
 932         hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \
 933         if (reg < 0x40000 && !is_gen8_shadowed(dev_priv, reg)) \
 934                 __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
 935         __raw_i915_write##x(dev_priv, reg, val); \
 936         hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \
 937         hsw_unclaimed_reg_detect(dev_priv); \
 938         GEN6_WRITE_FOOTER; \
 939 }
 940
 941 #define __chv_write(x) \
 942 static void \
 943 chv_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 944         bool shadowed = is_gen8_shadowed(dev_priv, reg); \
 945         GEN6_WRITE_HEADER; \
 946         if (!shadowed) { \
 947                 if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) \
 948                         __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
 949                 else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) \
 950                         __force_wake_get(dev_priv, FORCEWAKE_MEDIA); \
 951                 else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) \
 952                         __force_wake_get(dev_priv, FORCEWAKE_RENDER | FORCEWAKE_MEDIA); \
 953         } \
 954         __raw_i915_write##x(dev_priv, reg, val); \
 955         GEN6_WRITE_FOOTER; \
 956 }
 957
 958 static const u32 gen9_shadowed_regs[] = {
 959         RING_TAIL(RENDER_RING_BASE),
 960         RING_TAIL(GEN6_BSD_RING_BASE),
 961         RING_TAIL(VEBOX_RING_BASE),
 962         RING_TAIL(BLT_RING_BASE),
 963         FORCEWAKE_BLITTER_GEN9,
 964         FORCEWAKE_RENDER_GEN9,
 965         FORCEWAKE_MEDIA_GEN9,
 966         GEN6_RPNSWREQ,
 967         GEN6_RC_VIDEO_FREQ,
 968         /* TODO: Other registers are not yet used */
 969 };
 970
 971 static bool is_gen9_shadowed(struct drm_i915_private *dev_priv, u32 reg)
 972 {
 973         int i;
 974         for (i = 0; i < ARRAY_SIZE(gen9_shadowed_regs); i++)
 975                 if (reg == gen9_shadowed_regs[i])
 976                         return true;
 977
 978         return false;
 979 }
 980
 981 #define __gen9_write(x) \
 982 static void \
 983 gen9_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, \
 984                 bool trace) { \
 985         enum forcewake_domains fw_engine; \
 986         GEN6_WRITE_HEADER; \
 987         hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \
 988         if (!SKL_NEEDS_FORCE_WAKE(reg) || \
 989             is_gen9_shadowed(dev_priv, reg)) \
 990                 fw_engine = 0; \
 991         else if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg)) \
 992                 fw_engine = FORCEWAKE_RENDER; \
 993         else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg)) \
 994                 fw_engine = FORCEWAKE_MEDIA; \
 995         else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) \
 996                 fw_engine = FORCEWAKE_RENDER | FORCEWAKE_MEDIA; \
 997         else \
 998                 fw_engine = FORCEWAKE_BLITTER; \
 999         if (fw_engine) \
1000                 __force_wake_get(dev_priv, fw_engine); \
1001         __raw_i915_write##x(dev_priv, reg, val); \
1002         hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \
1003         hsw_unclaimed_reg_detect(dev_priv); \
1004         GEN6_WRITE_FOOTER; \
1005 }
1006
1007 __gen9_write(8)
1008 __gen9_write(16)
1009 __gen9_write(32)
1010 __gen9_write(64)
1011 __chv_write(8)
1012 __chv_write(16)
1013 __chv_write(32)
1014 __chv_write(64)
1015 __gen8_write(8)
1016 __gen8_write(16)
1017 __gen8_write(32)
1018 __gen8_write(64)
1019 __hsw_write(8)
1020 __hsw_write(16)
1021 __hsw_write(32)
1022 __hsw_write(64)
1023 __gen6_write(8)
1024 __gen6_write(16)
1025 __gen6_write(32)
1026 __gen6_write(64)
1027 __vgpu_write(8)
1028 __vgpu_write(16)
1029 __vgpu_write(32)
1030 __vgpu_write(64)
1031
1032 #undef __gen9_write
1033 #undef __chv_write
1034 #undef __gen8_write
1035 #undef __hsw_write
1036 #undef __gen6_write
1037 #undef __vgpu_write
1038 #undef GEN6_WRITE_FOOTER
1039 #undef GEN6_WRITE_HEADER
1040
1041 #define ASSIGN_WRITE_MMIO_VFUNCS(x) \
1042 do { \
1043         dev_priv->uncore.funcs.mmio_writeb = x##_write8; \
1044         dev_priv->uncore.funcs.mmio_writew = x##_write16; \
1045         dev_priv->uncore.funcs.mmio_writel = x##_write32; \
1046         dev_priv->uncore.funcs.mmio_writeq = x##_write64; \
1047 } while (0)
1048
1049 #define ASSIGN_READ_MMIO_VFUNCS(x) \
1050 do { \
1051         dev_priv->uncore.funcs.mmio_readb = x##_read8; \
1052         dev_priv->uncore.funcs.mmio_readw = x##_read16; \
1053         dev_priv->uncore.funcs.mmio_readl = x##_read32; \
1054         dev_priv->uncore.funcs.mmio_readq = x##_read64; \
1055 } while (0)
1056
1057
1058 static void fw_domain_init(struct drm_i915_private *dev_priv,
1059                            enum forcewake_domain_id domain_id,
1060                            u32 reg_set, u32 reg_ack)
1061 {
1062         struct intel_uncore_forcewake_domain *d;
1063
1064         if (WARN_ON(domain_id >= FW_DOMAIN_ID_COUNT))
1065                 return;
1066
1067         d = &dev_priv->uncore.fw_domain[domain_id];
1068
1069         WARN_ON(d->wake_count);
1070
1071         d->wake_count = 0;
1072         d->reg_set = reg_set;
1073         d->reg_ack = reg_ack;
1074
1075         if (IS_GEN6(dev_priv)) {
1076                 d->val_reset = 0;
1077                 d->val_set = FORCEWAKE_KERNEL;
1078                 d->val_clear = 0;
1079         } else {
1080                 /* WaRsClearFWBitsAtReset:bdw,skl */
1081                 d->val_reset = _MASKED_BIT_DISABLE(0xffff);
1082                 d->val_set = _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL);
1083                 d->val_clear = _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL);
1084         }
1085
1086         if (IS_VALLEYVIEW(dev_priv))
1087                 d->reg_post = FORCEWAKE_ACK_VLV;
1088         else if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv) || IS_GEN8(dev_priv))
1089                 d->reg_post = ECOBUS;
1090         else
1091                 d->reg_post = 0;
1092
1093         d->i915 = dev_priv;
1094         d->id = domain_id;
1095
1096         setup_timer(&d->timer, intel_uncore_fw_release_timer, (unsigned long)d);
1097
1098         dev_priv->uncore.fw_domains |= (1 << domain_id);
1099
1100         fw_domain_reset(d);
1101 }
1102
1103 static void intel_uncore_fw_domains_init(struct drm_device *dev)
1104 {
1105         struct drm_i915_private *dev_priv = dev->dev_private;
1106
1107         if (INTEL_INFO(dev_priv->dev)->gen <= 5)
1108                 return;
1109
1110         if (IS_GEN9(dev)) {
1111                 dev_priv->uncore.funcs.force_wake_get = fw_domains_get;
1112                 dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1113                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1114                                FORCEWAKE_RENDER_GEN9,
1115                                FORCEWAKE_ACK_RENDER_GEN9);
1116                 fw_domain_init(dev_priv, FW_DOMAIN_ID_BLITTER,
1117                                FORCEWAKE_BLITTER_GEN9,
1118                                FORCEWAKE_ACK_BLITTER_GEN9);
1119                 fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA,
1120                                FORCEWAKE_MEDIA_GEN9, FORCEWAKE_ACK_MEDIA_GEN9);
1121         } else if (IS_VALLEYVIEW(dev)) {
1122                 dev_priv->uncore.funcs.force_wake_get = fw_domains_get;
1123                 if (!IS_CHERRYVIEW(dev))
1124                         dev_priv->uncore.funcs.force_wake_put =
1125                                 fw_domains_put_with_fifo;
1126                 else
1127                         dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1128                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1129                                FORCEWAKE_VLV, FORCEWAKE_ACK_VLV);
1130                 fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA,
1131                                FORCEWAKE_MEDIA_VLV, FORCEWAKE_ACK_MEDIA_VLV);
1132         } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
1133                 dev_priv->uncore.funcs.force_wake_get =
1134                         fw_domains_get_with_thread_status;
1135                 dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1136                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1137                                FORCEWAKE_MT, FORCEWAKE_ACK_HSW);
1138         } else if (IS_IVYBRIDGE(dev)) {
1139                 u32 ecobus;
1140
1141                 /* IVB configs may use multi-threaded forcewake */
1142
1143                 /* A small trick here - if the bios hasn't configured
1144                  * MT forcewake, and if the device is in RC6, then
1145                  * force_wake_mt_get will not wake the device and the
1146                  * ECOBUS read will return zero. Which will be
1147                  * (correctly) interpreted by the test below as MT
1148                  * forcewake being disabled.
1149                  */
1150                 dev_priv->uncore.funcs.force_wake_get =
1151                         fw_domains_get_with_thread_status;
1152                 dev_priv->uncore.funcs.force_wake_put =
1153                         fw_domains_put_with_fifo;
1154
1155                 /* We need to init first for ECOBUS access and then
1156                  * determine later if we want to reinit, in case of MT access is
1157                  * not working. In this stage we don't know which flavour this
1158                  * ivb is, so it is better to reset also the gen6 fw registers
1159                  * before the ecobus check.
1160                  */
1161
1162                 __raw_i915_write32(dev_priv, FORCEWAKE, 0);
1163                 __raw_posting_read(dev_priv, ECOBUS);
1164
1165                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1166                                FORCEWAKE_MT, FORCEWAKE_MT_ACK);
1167
1168                 mutex_lock(&dev->struct_mutex);
1169                 fw_domains_get_with_thread_status(dev_priv, FORCEWAKE_ALL);
1170                 ecobus = __raw_i915_read32(dev_priv, ECOBUS);
1171                 fw_domains_put_with_fifo(dev_priv, FORCEWAKE_ALL);
1172                 mutex_unlock(&dev->struct_mutex);
1173
1174                 if (!(ecobus & FORCEWAKE_MT_ENABLE)) {
1175                         DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
1176                         DRM_INFO("when using vblank-synced partial screen updates.\n");
1177                         fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1178                                        FORCEWAKE, FORCEWAKE_ACK);
1179                 }
1180         } else if (IS_GEN6(dev)) {
1181                 dev_priv->uncore.funcs.force_wake_get =
1182                         fw_domains_get_with_thread_status;
1183                 dev_priv->uncore.funcs.force_wake_put =
1184                         fw_domains_put_with_fifo;
1185                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1186                                FORCEWAKE, FORCEWAKE_ACK);
1187         }
1188
1189         /* All future platforms are expected to require complex power gating */
1190         WARN_ON(dev_priv->uncore.fw_domains == 0);
1191 }
1192
1193 void intel_uncore_init(struct drm_device *dev)
1194 {
1195         struct drm_i915_private *dev_priv = dev->dev_private;
1196
1197         i915_check_vgpu(dev);
1198
1199         intel_uncore_ellc_detect(dev);
1200         intel_uncore_fw_domains_init(dev);
1201         __intel_uncore_early_sanitize(dev, false);
1202
1203         switch (INTEL_INFO(dev)->gen) {
1204         default:
1205         case 9:
1206                 ASSIGN_WRITE_MMIO_VFUNCS(gen9);
1207                 ASSIGN_READ_MMIO_VFUNCS(gen9);
1208                 break;
1209         case 8:
1210                 if (IS_CHERRYVIEW(dev)) {
1211                         ASSIGN_WRITE_MMIO_VFUNCS(chv);
1212                         ASSIGN_READ_MMIO_VFUNCS(chv);
1213
1214                 } else {
1215                         ASSIGN_WRITE_MMIO_VFUNCS(gen8);
1216                         ASSIGN_READ_MMIO_VFUNCS(gen6);
1217                 }
1218                 break;
1219         case 7:
1220         case 6:
1221                 if (IS_HASWELL(dev)) {
1222                         ASSIGN_WRITE_MMIO_VFUNCS(hsw);
1223                 } else {
1224                         ASSIGN_WRITE_MMIO_VFUNCS(gen6);
1225                 }
1226
1227                 if (IS_VALLEYVIEW(dev)) {
1228                         ASSIGN_READ_MMIO_VFUNCS(vlv);
1229                 } else {
1230                         ASSIGN_READ_MMIO_VFUNCS(gen6);
1231                 }
1232                 break;
1233         case 5:
1234                 ASSIGN_WRITE_MMIO_VFUNCS(gen5);
1235                 ASSIGN_READ_MMIO_VFUNCS(gen5);
1236                 break;
1237         case 4:
1238         case 3:
1239         case 2:
1240                 ASSIGN_WRITE_MMIO_VFUNCS(gen2);
1241                 ASSIGN_READ_MMIO_VFUNCS(gen2);
1242                 break;
1243         }
1244
1245         if (intel_vgpu_active(dev)) {
1246                 ASSIGN_WRITE_MMIO_VFUNCS(vgpu);
1247                 ASSIGN_READ_MMIO_VFUNCS(vgpu);
1248         }
1249
1250         i915_check_and_clear_faults(dev);
1251 }
1252 #undef ASSIGN_WRITE_MMIO_VFUNCS
1253 #undef ASSIGN_READ_MMIO_VFUNCS
1254
1255 void intel_uncore_fini(struct drm_device *dev)
1256 {
1257         /* Paranoia: make sure we have disabled everything before we exit. */
1258         intel_uncore_sanitize(dev);
1259         intel_uncore_forcewake_reset(dev, false);
1260 }
1261
1262 #define GEN_RANGE(l, h) GENMASK(h, l)
1263
1264 static const struct register_whitelist {
1265         uint64_t offset;
1266         uint32_t size;
1267         /* supported gens, 0x10 for 4, 0x30 for 4 and 5, etc. */
1268         uint32_t gen_bitmask;
1269 } whitelist[] = {
1270         { RING_TIMESTAMP(RENDER_RING_BASE), 8, GEN_RANGE(4, 9) },
1271 };
1272
1273 int i915_reg_read_ioctl(struct drm_device *dev,
1274                         void *data, struct drm_file *file)
1275 {
1276         struct drm_i915_private *dev_priv = dev->dev_private;
1277         struct drm_i915_reg_read *reg = data;
1278         struct register_whitelist const *entry = whitelist;
1279         unsigned size;
1280         u64 offset;
1281         int i, ret = 0;
1282
1283         for (i = 0; i < ARRAY_SIZE(whitelist); i++, entry++) {
1284                 if (entry->offset == (reg->offset & -entry->size) &&
1285                     (1 << INTEL_INFO(dev)->gen & entry->gen_bitmask))
1286                         break;
1287         }
1288
1289         if (i == ARRAY_SIZE(whitelist))
1290                 return -EINVAL;
1291
1292         /* We use the low bits to encode extra flags as the register should
1293          * be naturally aligned (and those that are not so aligned merely
1294          * limit the available flags for that register).
1295          */
1296         offset = entry->offset;
1297         size = entry->size;
1298         size |= reg->offset ^ offset;
1299
1300         intel_runtime_pm_get(dev_priv);
1301
1302         switch (size) {
1303         case 8 | 1:
1304                 reg->val = I915_READ64_2x32(offset, offset+4);
1305                 break;
1306         case 8:
1307                 reg->val = I915_READ64(offset);
1308                 break;
1309         case 4:
1310                 reg->val = I915_READ(offset);
1311                 break;
1312         case 2:
1313                 reg->val = I915_READ16(offset);
1314                 break;
1315         case 1:
1316                 reg->val = I915_READ8(offset);
1317                 break;
1318         default:
1319                 ret = -EINVAL;
1320                 goto out;
1321         }
1322
1323 out:
1324         intel_runtime_pm_put(dev_priv);
1325         return ret;
1326 }
1327
1328 int i915_get_reset_stats_ioctl(struct drm_device *dev,
1329                                void *data, struct drm_file *file)
1330 {
1331         struct drm_i915_private *dev_priv = dev->dev_private;
1332         struct drm_i915_reset_stats *args = data;
1333         struct i915_ctx_hang_stats *hs;
1334         struct intel_context *ctx;
1335         int ret;
1336
1337         if (args->flags || args->pad)
1338                 return -EINVAL;
1339
1340         if (args->ctx_id == DEFAULT_CONTEXT_HANDLE && !capable(CAP_SYS_ADMIN))
1341                 return -EPERM;
1342
1343         ret = mutex_lock_interruptible(&dev->struct_mutex);
1344         if (ret)
1345                 return ret;
1346
1347         ctx = i915_gem_context_get(file->driver_priv, args->ctx_id);
1348         if (IS_ERR(ctx)) {
1349                 mutex_unlock(&dev->struct_mutex);
1350                 return PTR_ERR(ctx);
1351         }
1352         hs = &ctx->hang_stats;
1353
1354         if (capable(CAP_SYS_ADMIN))
1355                 args->reset_count = i915_reset_count(&dev_priv->gpu_error);
1356         else
1357                 args->reset_count = 0;
1358
1359         args->batch_active = hs->batch_active;
1360         args->batch_pending = hs->batch_pending;
1361
1362         mutex_unlock(&dev->struct_mutex);
1363
1364         return 0;
1365 }
1366
1367 static int i915_reset_complete(struct drm_device *dev)
1368 {
1369         u8 gdrst;
1370         pci_read_config_byte(dev->pdev, I915_GDRST, &gdrst);
1371         return (gdrst & GRDOM_RESET_STATUS) == 0;
1372 }
1373
1374 static int i915_do_reset(struct drm_device *dev)
1375 {
1376         /* assert reset for at least 20 usec */
1377         pci_write_config_byte(dev->pdev, I915_GDRST, GRDOM_RESET_ENABLE);
1378         udelay(20);
1379         pci_write_config_byte(dev->pdev, I915_GDRST, 0);
1380
1381         return wait_for(i915_reset_complete(dev), 500);
1382 }
1383
1384 static int g4x_reset_complete(struct drm_device *dev)
1385 {
1386         u8 gdrst;
1387         pci_read_config_byte(dev->pdev, I915_GDRST, &gdrst);
1388         return (gdrst & GRDOM_RESET_ENABLE) == 0;
1389 }
1390
1391 static int g33_do_reset(struct drm_device *dev)
1392 {
1393         pci_write_config_byte(dev->pdev, I915_GDRST, GRDOM_RESET_ENABLE);
1394         return wait_for(g4x_reset_complete(dev), 500);
1395 }
1396
1397 static int g4x_do_reset(struct drm_device *dev)
1398 {
1399         struct drm_i915_private *dev_priv = dev->dev_private;
1400         int ret;
1401
1402         pci_write_config_byte(dev->pdev, I915_GDRST,
1403                               GRDOM_RENDER | GRDOM_RESET_ENABLE);
1404         ret =  wait_for(g4x_reset_complete(dev), 500);
1405         if (ret)
1406                 return ret;
1407
1408         /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1409         I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) | VCP_UNIT_CLOCK_GATE_DISABLE);
1410         POSTING_READ(VDECCLK_GATE_D);
1411
1412         pci_write_config_byte(dev->pdev, I915_GDRST,
1413                               GRDOM_MEDIA | GRDOM_RESET_ENABLE);
1414         ret =  wait_for(g4x_reset_complete(dev), 500);
1415         if (ret)
1416                 return ret;
1417
1418         /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1419         I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) & ~VCP_UNIT_CLOCK_GATE_DISABLE);
1420         POSTING_READ(VDECCLK_GATE_D);
1421
1422         pci_write_config_byte(dev->pdev, I915_GDRST, 0);
1423
1424         return 0;
1425 }
1426
1427 static int ironlake_do_reset(struct drm_device *dev)
1428 {
1429         struct drm_i915_private *dev_priv = dev->dev_private;
1430         int ret;
1431
1432         I915_WRITE(ILK_GDSR,
1433                    ILK_GRDOM_RENDER | ILK_GRDOM_RESET_ENABLE);
1434         ret = wait_for((I915_READ(ILK_GDSR) &
1435                         ILK_GRDOM_RESET_ENABLE) == 0, 500);
1436         if (ret)
1437                 return ret;
1438
1439         I915_WRITE(ILK_GDSR,
1440                    ILK_GRDOM_MEDIA | ILK_GRDOM_RESET_ENABLE);
1441         ret = wait_for((I915_READ(ILK_GDSR) &
1442                         ILK_GRDOM_RESET_ENABLE) == 0, 500);
1443         if (ret)
1444                 return ret;
1445
1446         I915_WRITE(ILK_GDSR, 0);
1447
1448         return 0;
1449 }
1450
1451 static int gen6_do_reset(struct drm_device *dev)
1452 {
1453         struct drm_i915_private *dev_priv = dev->dev_private;
1454         int     ret;
1455
1456         /* Reset the chip */
1457
1458         /* GEN6_GDRST is not in the gt power well, no need to check
1459          * for fifo space for the write or forcewake the chip for
1460          * the read
1461          */
1462         __raw_i915_write32(dev_priv, GEN6_GDRST, GEN6_GRDOM_FULL);
1463
1464         /* Spin waiting for the device to ack the reset request */
1465         ret = wait_for((__raw_i915_read32(dev_priv, GEN6_GDRST) & GEN6_GRDOM_FULL) == 0, 500);
1466
1467         intel_uncore_forcewake_reset(dev, true);
1468
1469         return ret;
1470 }
1471
1472 static int wait_for_register(struct drm_i915_private *dev_priv,
1473                              const u32 reg,
1474                              const u32 mask,
1475                              const u32 value,
1476                              const unsigned long timeout_ms)
1477 {
1478         return wait_for((I915_READ(reg) & mask) == value, timeout_ms);
1479 }
1480
1481 static int gen8_do_reset(struct drm_device *dev)
1482 {
1483         struct drm_i915_private *dev_priv = dev->dev_private;
1484         struct intel_engine_cs *engine;
1485         int i;
1486
1487         for_each_ring(engine, dev_priv, i) {
1488                 I915_WRITE(RING_RESET_CTL(engine->mmio_base),
1489                            _MASKED_BIT_ENABLE(RESET_CTL_REQUEST_RESET));
1490
1491                 if (wait_for_register(dev_priv,
1492                                       RING_RESET_CTL(engine->mmio_base),
1493                                       RESET_CTL_READY_TO_RESET,
1494                                       RESET_CTL_READY_TO_RESET,
1495                                       700)) {
1496                         DRM_ERROR("%s: reset request timeout\n", engine->name);
1497                         goto not_ready;
1498                 }
1499         }
1500
1501         return gen6_do_reset(dev);
1502
1503 not_ready:
1504         for_each_ring(engine, dev_priv, i)
1505                 I915_WRITE(RING_RESET_CTL(engine->mmio_base),
1506                            _MASKED_BIT_DISABLE(RESET_CTL_REQUEST_RESET));
1507
1508         return -EIO;
1509 }
1510
1511 static int (*intel_get_gpu_reset(struct drm_device *dev))(struct drm_device *)
1512 {
1513         if (!i915.reset)
1514                 return NULL;
1515
1516         if (INTEL_INFO(dev)->gen >= 8)
1517                 return gen8_do_reset;
1518         else if (INTEL_INFO(dev)->gen >= 6)
1519                 return gen6_do_reset;
1520         else if (IS_GEN5(dev))
1521                 return ironlake_do_reset;
1522         else if (IS_G4X(dev))
1523                 return g4x_do_reset;
1524         else if (IS_G33(dev))
1525                 return g33_do_reset;
1526         else if (INTEL_INFO(dev)->gen >= 3)
1527                 return i915_do_reset;
1528         else
1529                 return NULL;
1530 }
1531
1532 int intel_gpu_reset(struct drm_device *dev)
1533 {
1534         struct drm_i915_private *dev_priv = to_i915(dev);
1535         int (*reset)(struct drm_device *);
1536         int ret;
1537
1538         reset = intel_get_gpu_reset(dev);
1539         if (reset == NULL)
1540                 return -ENODEV;
1541
1542         /* If the power well sleeps during the reset, the reset
1543          * request may be dropped and never completes (causing -EIO).
1544          */
1545         intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
1546         ret = reset(dev);
1547         intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
1548
1549         return ret;
1550 }
1551
1552 bool intel_has_gpu_reset(struct drm_device *dev)
1553 {
1554         return intel_get_gpu_reset(dev) != NULL;
1555 }
1556
1557 void intel_uncore_check_errors(struct drm_device *dev)
1558 {
1559         struct drm_i915_private *dev_priv = dev->dev_private;
1560
1561         if (HAS_FPGA_DBG_UNCLAIMED(dev) &&
1562             (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
1563                 DRM_ERROR("Unclaimed register before interrupt\n");
1564                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
1565         }
1566 }