drivers/gpu/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 #include <linux/pm_runtime.h>
  29
  30 #define FORCEWAKE_ACK_TIMEOUT_MS 2
  31
  32 #define __raw_i915_read8(dev_priv__, reg__) readb((dev_priv__)->regs + (reg__))
  33 #define __raw_i915_write8(dev_priv__, reg__, val__) writeb(val__, (dev_priv__)->regs + (reg__))
  34
  35 #define __raw_i915_read16(dev_priv__, reg__) readw((dev_priv__)->regs + (reg__))
  36 #define __raw_i915_write16(dev_priv__, reg__, val__) writew(val__, (dev_priv__)->regs + (reg__))
  37
  38 #define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
  39 #define __raw_i915_write32(dev_priv__, reg__, val__) writel(val__, (dev_priv__)->regs + (reg__))
  40
  41 #define __raw_i915_read64(dev_priv__, reg__) readq((dev_priv__)->regs + (reg__))
  42 #define __raw_i915_write64(dev_priv__, reg__, val__) writeq(val__, (dev_priv__)->regs + (reg__))
  43
  44 #define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32(dev_priv__, reg__)
  45
  46 static const char * const forcewake_domain_names[] = {
  47         "render",
  48         "blitter",
  49         "media",
  50 };
  51
  52 const char *
  53 intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id)
  54 {
  55         BUILD_BUG_ON((sizeof(forcewake_domain_names)/sizeof(const char *)) !=
  56                      FW_DOMAIN_ID_COUNT);
  57
  58         if (id >= 0 && id < FW_DOMAIN_ID_COUNT)
  59                 return forcewake_domain_names[id];
  60
  61         WARN_ON(id);
  62
  63         return "unknown";
  64 }
  65
  66 static void
  67 assert_device_not_suspended(struct drm_i915_private *dev_priv)
  68 {
  69         WARN_ONCE(HAS_RUNTIME_PM(dev_priv->dev) && dev_priv->pm.suspended,
  70                   "Device suspended\n");
  71 }
  72
  73 static inline void
  74 fw_domain_reset(const struct intel_uncore_forcewake_domain *d)
  75 {
  76         WARN_ON(d->reg_set == 0);
  77         __raw_i915_write32(d->i915, d->reg_set, d->val_reset);
  78 }
  79
  80 static inline void
  81 fw_domain_arm_timer(struct intel_uncore_forcewake_domain *d)
  82 {
  83         mod_timer_pinned(&d->timer, jiffies + 1);
  84 }
  85
  86 static inline void
  87 fw_domain_wait_ack_clear(const struct intel_uncore_forcewake_domain *d)
  88 {
  89         if (wait_for_atomic((__raw_i915_read32(d->i915, d->reg_ack) &
  90                              FORCEWAKE_KERNEL) == 0,
  91                             FORCEWAKE_ACK_TIMEOUT_MS))
  92                 DRM_ERROR("%s: timed out waiting for forcewake ack to clear.\n",
  93                           intel_uncore_forcewake_domain_to_str(d->id));
  94 }
  95
  96 static inline void
  97 fw_domain_get(const struct intel_uncore_forcewake_domain *d)
  98 {
  99         __raw_i915_write32(d->i915, d->reg_set, d->val_set);
 100 }
 101
 102 static inline void
 103 fw_domain_wait_ack(const struct intel_uncore_forcewake_domain *d)
 104 {
 105         if (wait_for_atomic((__raw_i915_read32(d->i915, d->reg_ack) &
 106                              FORCEWAKE_KERNEL),
 107                             FORCEWAKE_ACK_TIMEOUT_MS))
 108                 DRM_ERROR("%s: timed out waiting for forcewake ack request.\n",
 109                           intel_uncore_forcewake_domain_to_str(d->id));
 110 }
 111
 112 static inline void
 113 fw_domain_put(const struct intel_uncore_forcewake_domain *d)
 114 {
 115         __raw_i915_write32(d->i915, d->reg_set, d->val_clear);
 116 }
 117
 118 static inline void
 119 fw_domain_posting_read(const struct intel_uncore_forcewake_domain *d)
 120 {
 121         /* something from same cacheline, but not from the set register */
 122         if (d->reg_post)
 123                 __raw_posting_read(d->i915, d->reg_post);
 124 }
 125
 126 static void
 127 fw_domains_get(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains)
 128 {
 129         struct intel_uncore_forcewake_domain *d;
 130         enum forcewake_domain_id id;
 131
 132         for_each_fw_domain_mask(d, fw_domains, dev_priv, id) {
 133                 fw_domain_wait_ack_clear(d);
 134                 fw_domain_get(d);
 135                 fw_domain_wait_ack(d);
 136         }
 137 }
 138
 139 static void
 140 fw_domains_put(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains)
 141 {
 142         struct intel_uncore_forcewake_domain *d;
 143         enum forcewake_domain_id id;
 144
 145         for_each_fw_domain_mask(d, fw_domains, dev_priv, id) {
 146                 fw_domain_put(d);
 147                 fw_domain_posting_read(d);
 148         }
 149 }
 150
 151 static void
 152 fw_domains_posting_read(struct drm_i915_private *dev_priv)
 153 {
 154         struct intel_uncore_forcewake_domain *d;
 155         enum forcewake_domain_id id;
 156
 157         /* No need to do for all, just do for first found */
 158         for_each_fw_domain(d, dev_priv, id) {
 159                 fw_domain_posting_read(d);
 160                 break;
 161         }
 162 }
 163
 164 static void
 165 fw_domains_reset(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains)
 166 {
 167         struct intel_uncore_forcewake_domain *d;
 168         enum forcewake_domain_id id;
 169
 170         if (dev_priv->uncore.fw_domains == 0)
 171                 return;
 172
 173         for_each_fw_domain_mask(d, fw_domains, dev_priv, id)
 174                 fw_domain_reset(d);
 175
 176         fw_domains_posting_read(dev_priv);
 177 }
 178
 179 static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
 180 {
 181         /* w/a for a sporadic read returning 0 by waiting for the GT
 182          * thread to wake up.
 183          */
 184         if (wait_for_atomic_us((__raw_i915_read32(dev_priv, GEN6_GT_THREAD_STATUS_REG) &
 185                                 GEN6_GT_THREAD_STATUS_CORE_MASK) == 0, 500))
 186                 DRM_ERROR("GT thread status wait timed out\n");
 187 }
 188
 189 static void fw_domains_get_with_thread_status(struct drm_i915_private *dev_priv,
 190                                               enum forcewake_domains fw_domains)
 191 {
 192         fw_domains_get(dev_priv, fw_domains);
 193
 194         /* WaRsForcewakeWaitTC0:snb,ivb,hsw,bdw,vlv */
 195         __gen6_gt_wait_for_thread_c0(dev_priv);
 196 }
 197
 198 static void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
 199 {
 200         u32 gtfifodbg;
 201
 202         gtfifodbg = __raw_i915_read32(dev_priv, GTFIFODBG);
 203         if (WARN(gtfifodbg, "GT wake FIFO error 0x%x\n", gtfifodbg))
 204                 __raw_i915_write32(dev_priv, GTFIFODBG, gtfifodbg);
 205 }
 206
 207 static void fw_domains_put_with_fifo(struct drm_i915_private *dev_priv,
 208                                      enum forcewake_domains fw_domains)
 209 {
 210         fw_domains_put(dev_priv, fw_domains);
 211         gen6_gt_check_fifodbg(dev_priv);
 212 }
 213
 214 static inline u32 fifo_free_entries(struct drm_i915_private *dev_priv)
 215 {
 216         u32 count = __raw_i915_read32(dev_priv, GTFIFOCTL);
 217
 218         return count & GT_FIFO_FREE_ENTRIES_MASK;
 219 }
 220
 221 static int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
 222 {
 223         int ret = 0;
 224
 225         /* On VLV, FIFO will be shared by both SW and HW.
 226          * So, we need to read the FREE_ENTRIES everytime */
 227         if (IS_VALLEYVIEW(dev_priv->dev))
 228                 dev_priv->uncore.fifo_count = fifo_free_entries(dev_priv);
 229
 230         if (dev_priv->uncore.fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {
 231                 int loop = 500;
 232                 u32 fifo = fifo_free_entries(dev_priv);
 233
 234                 while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
 235                         udelay(10);
 236                         fifo = fifo_free_entries(dev_priv);
 237                 }
 238                 if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES))
 239                         ++ret;
 240                 dev_priv->uncore.fifo_count = fifo;
 241         }
 242         dev_priv->uncore.fifo_count--;
 243
 244         return ret;
 245 }
 246
 247 static void intel_uncore_fw_release_timer(unsigned long arg)
 248 {
 249         struct intel_uncore_forcewake_domain *domain = (void *)arg;
 250         unsigned long irqflags;
 251
 252         assert_device_not_suspended(domain->i915);
 253
 254         spin_lock_irqsave(&domain->i915->uncore.lock, irqflags);
 255         if (WARN_ON(domain->wake_count == 0))
 256                 domain->wake_count++;
 257
 258         if (--domain->wake_count == 0)
 259                 domain->i915->uncore.funcs.force_wake_put(domain->i915,
 260                                                           1 << domain->id);
 261
 262         spin_unlock_irqrestore(&domain->i915->uncore.lock, irqflags);
 263 }
 264
 265 void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
 266 {
 267         struct drm_i915_private *dev_priv = dev->dev_private;
 268         unsigned long irqflags;
 269         struct intel_uncore_forcewake_domain *domain;
 270         int retry_count = 100;
 271         enum forcewake_domain_id id;
 272         enum forcewake_domains fw = 0, active_domains;
 273
 274         /* Hold uncore.lock across reset to prevent any register access
 275          * with forcewake not set correctly. Wait until all pending
 276          * timers are run before holding.
 277          */
 278         while (1) {
 279                 active_domains = 0;
 280
 281                 for_each_fw_domain(domain, dev_priv, id) {
 282                         if (del_timer_sync(&domain->timer) == 0)
 283                                 continue;
 284
 285                         intel_uncore_fw_release_timer((unsigned long)domain);
 286                 }
 287
 288                 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 289
 290                 for_each_fw_domain(domain, dev_priv, id) {
 291                         if (timer_pending(&domain->timer))
 292                                 active_domains |= (1 << id);
 293                 }
 294
 295                 if (active_domains == 0)
 296                         break;
 297
 298                 if (--retry_count == 0) {
 299                         DRM_ERROR("Timed out waiting for forcewake timers to finish\n");
 300                         break;
 301                 }
 302
 303                 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 304                 cond_resched();
 305         }
 306
 307         WARN_ON(active_domains);
 308
 309         for_each_fw_domain(domain, dev_priv, id)
 310                 if (domain->wake_count)
 311                         fw |= 1 << id;
 312
 313         if (fw)
 314                 dev_priv->uncore.funcs.force_wake_put(dev_priv, fw);
 315
 316         fw_domains_reset(dev_priv, FORCEWAKE_ALL);
 317
 318         if (restore) { /* If reset with a user forcewake, try to restore */
 319                 if (fw)
 320                         dev_priv->uncore.funcs.force_wake_get(dev_priv, fw);
 321
 322                 if (IS_GEN6(dev) || IS_GEN7(dev))
 323                         dev_priv->uncore.fifo_count =
 324                                 fifo_free_entries(dev_priv);
 325         }
 326
 327         if (!restore)
 328                 assert_forcewakes_inactive(dev_priv);
 329
 330         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 331 }
 332
 333 static void intel_uncore_ellc_detect(struct drm_device *dev)
 334 {
 335         struct drm_i915_private *dev_priv = dev->dev_private;
 336
 337         if ((IS_HASWELL(dev) || IS_BROADWELL(dev) ||
 338              INTEL_INFO(dev)->gen >= 9) &&
 339             (__raw_i915_read32(dev_priv, HSW_EDRAM_PRESENT) & EDRAM_ENABLED)) {
 340                 /* The docs do not explain exactly how the calculation can be
 341                  * made. It is somewhat guessable, but for now, it's always
 342                  * 128MB.
 343                  * NB: We can't write IDICR yet because we do not have gt funcs
 344                  * set up */
 345                 dev_priv->ellc_size = 128;
 346                 DRM_INFO("Found %zuMB of eLLC\n", dev_priv->ellc_size);
 347         }
 348 }
 349
 350 static void __intel_uncore_early_sanitize(struct drm_device *dev,
 351                                           bool restore_forcewake)
 352 {
 353         struct drm_i915_private *dev_priv = dev->dev_private;
 354
 355         if (HAS_FPGA_DBG_UNCLAIMED(dev))
 356                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 357
 358         /* clear out old GT FIFO errors */
 359         if (IS_GEN6(dev) || IS_GEN7(dev))
 360                 __raw_i915_write32(dev_priv, GTFIFODBG,
 361                                    __raw_i915_read32(dev_priv, GTFIFODBG));
 362
 363         /* WaDisableShadowRegForCpd:chv */
 364         if (IS_CHERRYVIEW(dev)) {
 365                 __raw_i915_write32(dev_priv, GTFIFOCTL,
 366                                    __raw_i915_read32(dev_priv, GTFIFOCTL) |
 367                                    GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL |
 368                                    GT_FIFO_CTL_RC6_POLICY_STALL);
 369         }
 370
 371         intel_uncore_forcewake_reset(dev, restore_forcewake);
 372 }
 373
 374 void intel_uncore_early_sanitize(struct drm_device *dev, bool restore_forcewake)
 375 {
 376         __intel_uncore_early_sanitize(dev, restore_forcewake);
 377         i915_check_and_clear_faults(dev);
 378 }
 379
 380 void intel_uncore_sanitize(struct drm_device *dev)
 381 {
 382         /* BIOS often leaves RC6 enabled, but disable it for hw init */
 383         intel_disable_gt_powersave(dev);
 384 }
 385
 386 static void __intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
 387                                          enum forcewake_domains fw_domains)
 388 {
 389         struct intel_uncore_forcewake_domain *domain;
 390         enum forcewake_domain_id id;
 391
 392         if (!dev_priv->uncore.funcs.force_wake_get)
 393                 return;
 394
 395         fw_domains &= dev_priv->uncore.fw_domains;
 396
 397         for_each_fw_domain_mask(domain, fw_domains, dev_priv, id) {
 398                 if (domain->wake_count++)
 399                         fw_domains &= ~(1 << id);
 400         }
 401
 402         if (fw_domains)
 403                 dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
 404 }
 405
 406 /**
 407  * intel_uncore_forcewake_get - grab forcewake domain references
 408  * @dev_priv: i915 device instance
 409  * @fw_domains: forcewake domains to get reference on
 410  *
 411  * This function can be used get GT's forcewake domain references.
 412  * Normal register access will handle the forcewake domains automatically.
 413  * However if some sequence requires the GT to not power down a particular
 414  * forcewake domains this function should be called at the beginning of the
 415  * sequence. And subsequently the reference should be dropped by symmetric
 416  * call to intel_unforce_forcewake_put(). Usually caller wants all the domains
 417  * to be kept awake so the @fw_domains would be then FORCEWAKE_ALL.
 418  */
 419 void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
 420                                 enum forcewake_domains fw_domains)
 421 {
 422         unsigned long irqflags;
 423
 424         if (!dev_priv->uncore.funcs.force_wake_get)
 425                 return;
 426
 427         WARN_ON(dev_priv->pm.suspended);
 428
 429         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 430         __intel_uncore_forcewake_get(dev_priv, fw_domains);
 431         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 432 }
 433
 434 /**
 435  * intel_uncore_forcewake_get__locked - grab forcewake domain references
 436  * @dev_priv: i915 device instance
 437  * @fw_domains: forcewake domains to get reference on
 438  *
 439  * See intel_uncore_forcewake_get(). This variant places the onus
 440  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
 441  */
 442 void intel_uncore_forcewake_get__locked(struct drm_i915_private *dev_priv,
 443                                         enum forcewake_domains fw_domains)
 444 {
 445         assert_spin_locked(&dev_priv->uncore.lock);
 446
 447         if (!dev_priv->uncore.funcs.force_wake_get)
 448                 return;
 449
 450         __intel_uncore_forcewake_get(dev_priv, fw_domains);
 451 }
 452
 453 static void __intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
 454                                          enum forcewake_domains fw_domains)
 455 {
 456         struct intel_uncore_forcewake_domain *domain;
 457         enum forcewake_domain_id id;
 458
 459         if (!dev_priv->uncore.funcs.force_wake_put)
 460                 return;
 461
 462         fw_domains &= dev_priv->uncore.fw_domains;
 463
 464         for_each_fw_domain_mask(domain, fw_domains, dev_priv, id) {
 465                 if (WARN_ON(domain->wake_count == 0))
 466                         continue;
 467
 468                 if (--domain->wake_count)
 469                         continue;
 470
 471                 domain->wake_count++;
 472                 fw_domain_arm_timer(domain);
 473         }
 474 }
 475
 476 /**
 477  * intel_uncore_forcewake_put - release a forcewake domain reference
 478  * @dev_priv: i915 device instance
 479  * @fw_domains: forcewake domains to put references
 480  *
 481  * This function drops the device-level forcewakes for specified
 482  * domains obtained by intel_uncore_forcewake_get().
 483  */
 484 void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
 485                                 enum forcewake_domains fw_domains)
 486 {
 487         unsigned long irqflags;
 488
 489         if (!dev_priv->uncore.funcs.force_wake_put)
 490                 return;
 491
 492         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 493         __intel_uncore_forcewake_put(dev_priv, fw_domains);
 494         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 495 }
 496
 497 /**
 498  * intel_uncore_forcewake_put__locked - grab forcewake domain references
 499  * @dev_priv: i915 device instance
 500  * @fw_domains: forcewake domains to get reference on
 501  *
 502  * See intel_uncore_forcewake_put(). This variant places the onus
 503  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
 504  */
 505 void intel_uncore_forcewake_put__locked(struct drm_i915_private *dev_priv,
 506                                         enum forcewake_domains fw_domains)
 507 {
 508         assert_spin_locked(&dev_priv->uncore.lock);
 509
 510         if (!dev_priv->uncore.funcs.force_wake_put)
 511                 return;
 512
 513         __intel_uncore_forcewake_put(dev_priv, fw_domains);
 514 }
 515
 516 void assert_forcewakes_inactive(struct drm_i915_private *dev_priv)
 517 {
 518         struct intel_uncore_forcewake_domain *domain;
 519         enum forcewake_domain_id id;
 520
 521         if (!dev_priv->uncore.funcs.force_wake_get)
 522                 return;
 523
 524         for_each_fw_domain(domain, dev_priv, id)
 525                 WARN_ON(domain->wake_count);
 526 }
 527
 528 /* We give fast paths for the really cool registers */
 529 #define NEEDS_FORCE_WAKE(dev_priv, reg) \
 530          ((reg) < 0x40000 && (reg) != FORCEWAKE)
 531
 532 #define REG_RANGE(reg, start, end) ((reg) >= (start) && (reg) < (end))
 533
 534 #define FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg) \
 535         (REG_RANGE((reg), 0x2000, 0x4000) || \
 536          REG_RANGE((reg), 0x5000, 0x8000) || \
 537          REG_RANGE((reg), 0xB000, 0x12000) || \
 538          REG_RANGE((reg), 0x2E000, 0x30000))
 539
 540 #define FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg) \
 541         (REG_RANGE((reg), 0x12000, 0x14000) || \
 542          REG_RANGE((reg), 0x22000, 0x24000) || \
 543          REG_RANGE((reg), 0x30000, 0x40000))
 544
 545 #define FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg) \
 546         (REG_RANGE((reg), 0x2000, 0x4000) || \
 547          REG_RANGE((reg), 0x5200, 0x8000) || \
 548          REG_RANGE((reg), 0x8300, 0x8500) || \
 549          REG_RANGE((reg), 0xB000, 0xB480) || \
 550          REG_RANGE((reg), 0xE000, 0xE800))
 551
 552 #define FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg) \
 553         (REG_RANGE((reg), 0x8800, 0x8900) || \
 554          REG_RANGE((reg), 0xD000, 0xD800) || \
 555          REG_RANGE((reg), 0x12000, 0x14000) || \
 556          REG_RANGE((reg), 0x1A000, 0x1C000) || \
 557          REG_RANGE((reg), 0x1E800, 0x1EA00) || \
 558          REG_RANGE((reg), 0x30000, 0x38000))
 559
 560 #define FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg) \
 561         (REG_RANGE((reg), 0x4000, 0x5000) || \
 562          REG_RANGE((reg), 0x8000, 0x8300) || \
 563          REG_RANGE((reg), 0x8500, 0x8600) || \
 564          REG_RANGE((reg), 0x9000, 0xB000) || \
 565          REG_RANGE((reg), 0xF000, 0x10000))
 566
 567 #define FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) \
 568         REG_RANGE((reg), 0xB00,  0x2000)
 569
 570 #define FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) \
 571         (REG_RANGE((reg), 0x2000, 0x2700) || \
 572          REG_RANGE((reg), 0x3000, 0x4000) || \
 573          REG_RANGE((reg), 0x5200, 0x8000) || \
 574          REG_RANGE((reg), 0x8140, 0x8160) || \
 575          REG_RANGE((reg), 0x8300, 0x8500) || \
 576          REG_RANGE((reg), 0x8C00, 0x8D00) || \
 577          REG_RANGE((reg), 0xB000, 0xB480) || \
 578          REG_RANGE((reg), 0xE000, 0xE900) || \
 579          REG_RANGE((reg), 0x24400, 0x24800))
 580
 581 #define FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) \
 582         (REG_RANGE((reg), 0x8130, 0x8140) || \
 583          REG_RANGE((reg), 0x8800, 0x8A00) || \
 584          REG_RANGE((reg), 0xD000, 0xD800) || \
 585          REG_RANGE((reg), 0x12000, 0x14000) || \
 586          REG_RANGE((reg), 0x1A000, 0x1EA00) || \
 587          REG_RANGE((reg), 0x30000, 0x40000))
 588
 589 #define FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg) \
 590         REG_RANGE((reg), 0x9400, 0x9800)
 591
 592 #define FORCEWAKE_GEN9_BLITTER_RANGE_OFFSET(reg) \
 593         ((reg) < 0x40000 &&\
 594          !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) && \
 595          !FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) && \
 596          !FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) && \
 597          !FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg))
 598
 599 static void
 600 ilk_dummy_write(struct drm_i915_private *dev_priv)
 601 {
 602         /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
 603          * the chip from rc6 before touching it for real. MI_MODE is masked,
 604          * hence harmless to write 0 into. */
 605         __raw_i915_write32(dev_priv, MI_MODE, 0);
 606 }
 607
 608 static void
 609 hsw_unclaimed_reg_debug(struct drm_i915_private *dev_priv, u32 reg, bool read,
 610                         bool before)
 611 {
 612         const char *op = read ? "reading" : "writing to";
 613         const char *when = before ? "before" : "after";
 614
 615         if (!i915.mmio_debug)
 616                 return;
 617
 618         if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) {
 619                 WARN(1, "Unclaimed register detected %s %s register 0x%x\n",
 620                      when, op, reg);
 621                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 622                 i915.mmio_debug--; /* Only report the first N failures */
 623         }
 624 }
 625
 626 static void
 627 hsw_unclaimed_reg_detect(struct drm_i915_private *dev_priv)
 628 {
 629         static bool mmio_debug_once = true;
 630
 631         if (i915.mmio_debug || !mmio_debug_once)
 632                 return;
 633
 634         if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) {
 635                 DRM_DEBUG("Unclaimed register detected, "
 636                           "enabling oneshot unclaimed register reporting. "
 637                           "Please use i915.mmio_debug=N for more information.\n");
 638                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 639                 i915.mmio_debug = mmio_debug_once--;
 640         }
 641 }
 642
 643 #define GEN2_READ_HEADER(x) \
 644         u##x val = 0; \
 645         assert_device_not_suspended(dev_priv);
 646
 647 #define GEN2_READ_FOOTER \
 648         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
 649         return val
 650
 651 #define __gen2_read(x) \
 652 static u##x \
 653 gen2_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 654         GEN2_READ_HEADER(x); \
 655         val = __raw_i915_read##x(dev_priv, reg); \
 656         GEN2_READ_FOOTER; \
 657 }
 658
 659 #define __gen5_read(x) \
 660 static u##x \
 661 gen5_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 662         GEN2_READ_HEADER(x); \
 663         ilk_dummy_write(dev_priv); \
 664         val = __raw_i915_read##x(dev_priv, reg); \
 665         GEN2_READ_FOOTER; \
 666 }
 667
 668 __gen5_read(8)
 669 __gen5_read(16)
 670 __gen5_read(32)
 671 __gen5_read(64)
 672 __gen2_read(8)
 673 __gen2_read(16)
 674 __gen2_read(32)
 675 __gen2_read(64)
 676
 677 #undef __gen5_read
 678 #undef __gen2_read
 679
 680 #undef GEN2_READ_FOOTER
 681 #undef GEN2_READ_HEADER
 682
 683 #define GEN6_READ_HEADER(x) \
 684         unsigned long irqflags; \
 685         u##x val = 0; \
 686         assert_device_not_suspended(dev_priv); \
 687         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
 688
 689 #define GEN6_READ_FOOTER \
 690         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
 691         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
 692         return val
 693
 694 static inline void __force_wake_get(struct drm_i915_private *dev_priv,
 695                                     enum forcewake_domains fw_domains)
 696 {
 697         struct intel_uncore_forcewake_domain *domain;
 698         enum forcewake_domain_id id;
 699
 700         if (WARN_ON(!fw_domains))
 701                 return;
 702
 703         /* Ideally GCC would be constant-fold and eliminate this loop */
 704         for_each_fw_domain_mask(domain, fw_domains, dev_priv, id) {
 705                 if (domain->wake_count) {
 706                         fw_domains &= ~(1 << id);
 707                         continue;
 708                 }
 709
 710                 domain->wake_count++;
 711                 fw_domain_arm_timer(domain);
 712         }
 713
 714         if (fw_domains)
 715                 dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
 716 }
 717
 718 #define __vgpu_read(x) \
 719 static u##x \
 720 vgpu_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 721         GEN6_READ_HEADER(x); \
 722         val = __raw_i915_read##x(dev_priv, reg); \
 723         GEN6_READ_FOOTER; \
 724 }
 725
 726 #define __gen6_read(x) \
 727 static u##x \
 728 gen6_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 729         GEN6_READ_HEADER(x); \
 730         hsw_unclaimed_reg_debug(dev_priv, reg, true, true); \
 731         if (NEEDS_FORCE_WAKE((dev_priv), (reg))) \
 732                 __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
 733         val = __raw_i915_read##x(dev_priv, reg); \
 734         hsw_unclaimed_reg_debug(dev_priv, reg, true, false); \
 735         GEN6_READ_FOOTER; \
 736 }
 737
 738 #define __vlv_read(x) \
 739 static u##x \
 740 vlv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 741         GEN6_READ_HEADER(x); \
 742         if (FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg)) \
 743                 __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
 744         else if (FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg)) \
 745                 __force_wake_get(dev_priv, FORCEWAKE_MEDIA); \
 746         val = __raw_i915_read##x(dev_priv, reg); \
 747         GEN6_READ_FOOTER; \
 748 }
 749
 750 #define __chv_read(x) \
 751 static u##x \
 752 chv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 753         GEN6_READ_HEADER(x); \
 754         if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) \
 755                 __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
 756         else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) \
 757                 __force_wake_get(dev_priv, FORCEWAKE_MEDIA); \
 758         else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) \
 759                 __force_wake_get(dev_priv, \
 760                                  FORCEWAKE_RENDER | FORCEWAKE_MEDIA); \
 761         val = __raw_i915_read##x(dev_priv, reg); \
 762         GEN6_READ_FOOTER; \
 763 }
 764
 765 #define SKL_NEEDS_FORCE_WAKE(dev_priv, reg)     \
 766          ((reg) < 0x40000 && !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg))
 767
 768 #define __gen9_read(x) \
 769 static u##x \
 770 gen9_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 771         enum forcewake_domains fw_engine; \
 772         GEN6_READ_HEADER(x); \
 773         if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (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         GEN6_READ_FOOTER; \
 787 }
 788
 789 __vgpu_read(8)
 790 __vgpu_read(16)
 791 __vgpu_read(32)
 792 __vgpu_read(64)
 793 __gen9_read(8)
 794 __gen9_read(16)
 795 __gen9_read(32)
 796 __gen9_read(64)
 797 __chv_read(8)
 798 __chv_read(16)
 799 __chv_read(32)
 800 __chv_read(64)
 801 __vlv_read(8)
 802 __vlv_read(16)
 803 __vlv_read(32)
 804 __vlv_read(64)
 805 __gen6_read(8)
 806 __gen6_read(16)
 807 __gen6_read(32)
 808 __gen6_read(64)
 809
 810 #undef __gen9_read
 811 #undef __chv_read
 812 #undef __vlv_read
 813 #undef __gen6_read
 814 #undef __vgpu_read
 815 #undef GEN6_READ_FOOTER
 816 #undef GEN6_READ_HEADER
 817
 818 #define GEN2_WRITE_HEADER \
 819         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
 820         assert_device_not_suspended(dev_priv); \
 821
 822 #define GEN2_WRITE_FOOTER
 823
 824 #define __gen2_write(x) \
 825 static void \
 826 gen2_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 827         GEN2_WRITE_HEADER; \
 828         __raw_i915_write##x(dev_priv, reg, val); \
 829         GEN2_WRITE_FOOTER; \
 830 }
 831
 832 #define __gen5_write(x) \
 833 static void \
 834 gen5_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 835         GEN2_WRITE_HEADER; \
 836         ilk_dummy_write(dev_priv); \
 837         __raw_i915_write##x(dev_priv, reg, val); \
 838         GEN2_WRITE_FOOTER; \
 839 }
 840
 841 __gen5_write(8)
 842 __gen5_write(16)
 843 __gen5_write(32)
 844 __gen5_write(64)
 845 __gen2_write(8)
 846 __gen2_write(16)
 847 __gen2_write(32)
 848 __gen2_write(64)
 849
 850 #undef __gen5_write
 851 #undef __gen2_write
 852
 853 #undef GEN2_WRITE_FOOTER
 854 #undef GEN2_WRITE_HEADER
 855
 856 #define GEN6_WRITE_HEADER \
 857         unsigned long irqflags; \
 858         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
 859         assert_device_not_suspended(dev_priv); \
 860         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
 861
 862 #define GEN6_WRITE_FOOTER \
 863         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags)
 864
 865 #define __gen6_write(x) \
 866 static void \
 867 gen6_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 868         u32 __fifo_ret = 0; \
 869         GEN6_WRITE_HEADER; \
 870         if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
 871                 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
 872         } \
 873         __raw_i915_write##x(dev_priv, reg, val); \
 874         if (unlikely(__fifo_ret)) { \
 875                 gen6_gt_check_fifodbg(dev_priv); \
 876         } \
 877         GEN6_WRITE_FOOTER; \
 878 }
 879
 880 #define __hsw_write(x) \
 881 static void \
 882 hsw_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 883         u32 __fifo_ret = 0; \
 884         GEN6_WRITE_HEADER; \
 885         if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
 886                 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
 887         } \
 888         hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \
 889         __raw_i915_write##x(dev_priv, reg, val); \
 890         if (unlikely(__fifo_ret)) { \
 891                 gen6_gt_check_fifodbg(dev_priv); \
 892         } \
 893         hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \
 894         hsw_unclaimed_reg_detect(dev_priv); \
 895         GEN6_WRITE_FOOTER; \
 896 }
 897
 898 #define __vgpu_write(x) \
 899 static void vgpu_write##x(struct drm_i915_private *dev_priv, \
 900                           off_t reg, u##x val, bool trace) { \
 901         GEN6_WRITE_HEADER; \
 902         __raw_i915_write##x(dev_priv, reg, val); \
 903         GEN6_WRITE_FOOTER; \
 904 }
 905
 906 static const u32 gen8_shadowed_regs[] = {
 907         FORCEWAKE_MT,
 908         GEN6_RPNSWREQ,
 909         GEN6_RC_VIDEO_FREQ,
 910         RING_TAIL(RENDER_RING_BASE),
 911         RING_TAIL(GEN6_BSD_RING_BASE),
 912         RING_TAIL(VEBOX_RING_BASE),
 913         RING_TAIL(BLT_RING_BASE),
 914         /* TODO: Other registers are not yet used */
 915 };
 916
 917 static bool is_gen8_shadowed(struct drm_i915_private *dev_priv, u32 reg)
 918 {
 919         int i;
 920         for (i = 0; i < ARRAY_SIZE(gen8_shadowed_regs); i++)
 921                 if (reg == gen8_shadowed_regs[i])
 922                         return true;
 923
 924         return false;
 925 }
 926
 927 #define __gen8_write(x) \
 928 static void \
 929 gen8_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 930         GEN6_WRITE_HEADER; \
 931         hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \
 932         if (reg < 0x40000 && !is_gen8_shadowed(dev_priv, reg)) \
 933                 __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
 934         __raw_i915_write##x(dev_priv, reg, val); \
 935         hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \
 936         hsw_unclaimed_reg_detect(dev_priv); \
 937         GEN6_WRITE_FOOTER; \
 938 }
 939
 940 #define __chv_write(x) \
 941 static void \
 942 chv_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 943         bool shadowed = is_gen8_shadowed(dev_priv, reg); \
 944         GEN6_WRITE_HEADER; \
 945         if (!shadowed) { \
 946                 if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) \
 947                         __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
 948                 else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) \
 949                         __force_wake_get(dev_priv, FORCEWAKE_MEDIA); \
 950                 else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) \
 951                         __force_wake_get(dev_priv, FORCEWAKE_RENDER | FORCEWAKE_MEDIA); \
 952         } \
 953         __raw_i915_write##x(dev_priv, reg, val); \
 954         GEN6_WRITE_FOOTER; \
 955 }
 956
 957 static const u32 gen9_shadowed_regs[] = {
 958         RING_TAIL(RENDER_RING_BASE),
 959         RING_TAIL(GEN6_BSD_RING_BASE),
 960         RING_TAIL(VEBOX_RING_BASE),
 961         RING_TAIL(BLT_RING_BASE),
 962         FORCEWAKE_BLITTER_GEN9,
 963         FORCEWAKE_RENDER_GEN9,
 964         FORCEWAKE_MEDIA_GEN9,
 965         GEN6_RPNSWREQ,
 966         GEN6_RC_VIDEO_FREQ,
 967         /* TODO: Other registers are not yet used */
 968 };
 969
 970 static bool is_gen9_shadowed(struct drm_i915_private *dev_priv, u32 reg)
 971 {
 972         int i;
 973         for (i = 0; i < ARRAY_SIZE(gen9_shadowed_regs); i++)
 974                 if (reg == gen9_shadowed_regs[i])
 975                         return true;
 976
 977         return false;
 978 }
 979
 980 #define __gen9_write(x) \
 981 static void \
 982 gen9_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, \
 983                 bool trace) { \
 984         enum forcewake_domains fw_engine; \
 985         GEN6_WRITE_HEADER; \
 986         if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg)) || \
 987             is_gen9_shadowed(dev_priv, reg)) \
 988                 fw_engine = 0; \
 989         else if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg)) \
 990                 fw_engine = FORCEWAKE_RENDER; \
 991         else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg)) \
 992                 fw_engine = FORCEWAKE_MEDIA; \
 993         else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) \
 994                 fw_engine = FORCEWAKE_RENDER | FORCEWAKE_MEDIA; \
 995         else \
 996                 fw_engine = FORCEWAKE_BLITTER; \
 997         if (fw_engine) \
 998                 __force_wake_get(dev_priv, fw_engine); \
 999         __raw_i915_write##x(dev_priv, reg, val); \
1000         GEN6_WRITE_FOOTER; \
1001 }
1002
1003 __gen9_write(8)
1004 __gen9_write(16)
1005 __gen9_write(32)
1006 __gen9_write(64)
1007 __chv_write(8)
1008 __chv_write(16)
1009 __chv_write(32)
1010 __chv_write(64)
1011 __gen8_write(8)
1012 __gen8_write(16)
1013 __gen8_write(32)
1014 __gen8_write(64)
1015 __hsw_write(8)
1016 __hsw_write(16)
1017 __hsw_write(32)
1018 __hsw_write(64)
1019 __gen6_write(8)
1020 __gen6_write(16)
1021 __gen6_write(32)
1022 __gen6_write(64)
1023 __vgpu_write(8)
1024 __vgpu_write(16)
1025 __vgpu_write(32)
1026 __vgpu_write(64)
1027
1028 #undef __gen9_write
1029 #undef __chv_write
1030 #undef __gen8_write
1031 #undef __hsw_write
1032 #undef __gen6_write
1033 #undef __vgpu_write
1034 #undef GEN6_WRITE_FOOTER
1035 #undef GEN6_WRITE_HEADER
1036
1037 #define ASSIGN_WRITE_MMIO_VFUNCS(x) \
1038 do { \
1039         dev_priv->uncore.funcs.mmio_writeb = x##_write8; \
1040         dev_priv->uncore.funcs.mmio_writew = x##_write16; \
1041         dev_priv->uncore.funcs.mmio_writel = x##_write32; \
1042         dev_priv->uncore.funcs.mmio_writeq = x##_write64; \
1043 } while (0)
1044
1045 #define ASSIGN_READ_MMIO_VFUNCS(x) \
1046 do { \
1047         dev_priv->uncore.funcs.mmio_readb = x##_read8; \
1048         dev_priv->uncore.funcs.mmio_readw = x##_read16; \
1049         dev_priv->uncore.funcs.mmio_readl = x##_read32; \
1050         dev_priv->uncore.funcs.mmio_readq = x##_read64; \
1051 } while (0)
1052
1053
1054 static void fw_domain_init(struct drm_i915_private *dev_priv,
1055                            enum forcewake_domain_id domain_id,
1056                            u32 reg_set, u32 reg_ack)
1057 {
1058         struct intel_uncore_forcewake_domain *d;
1059
1060         if (WARN_ON(domain_id >= FW_DOMAIN_ID_COUNT))
1061                 return;
1062
1063         d = &dev_priv->uncore.fw_domain[domain_id];
1064
1065         WARN_ON(d->wake_count);
1066
1067         d->wake_count = 0;
1068         d->reg_set = reg_set;
1069         d->reg_ack = reg_ack;
1070
1071         if (IS_GEN6(dev_priv)) {
1072                 d->val_reset = 0;
1073                 d->val_set = FORCEWAKE_KERNEL;
1074                 d->val_clear = 0;
1075         } else {
1076                 /* WaRsClearFWBitsAtReset:bdw,skl */
1077                 d->val_reset = _MASKED_BIT_DISABLE(0xffff);
1078                 d->val_set = _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL);
1079                 d->val_clear = _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL);
1080         }
1081
1082         if (IS_VALLEYVIEW(dev_priv))
1083                 d->reg_post = FORCEWAKE_ACK_VLV;
1084         else if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv) || IS_GEN8(dev_priv))
1085                 d->reg_post = ECOBUS;
1086         else
1087                 d->reg_post = 0;
1088
1089         d->i915 = dev_priv;
1090         d->id = domain_id;
1091
1092         setup_timer(&d->timer, intel_uncore_fw_release_timer, (unsigned long)d);
1093
1094         dev_priv->uncore.fw_domains |= (1 << domain_id);
1095
1096         fw_domain_reset(d);
1097 }
1098
1099 static void intel_uncore_fw_domains_init(struct drm_device *dev)
1100 {
1101         struct drm_i915_private *dev_priv = dev->dev_private;
1102
1103         if (INTEL_INFO(dev_priv->dev)->gen <= 5)
1104                 return;
1105
1106         if (IS_GEN9(dev)) {
1107                 dev_priv->uncore.funcs.force_wake_get = fw_domains_get;
1108                 dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1109                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1110                                FORCEWAKE_RENDER_GEN9,
1111                                FORCEWAKE_ACK_RENDER_GEN9);
1112                 fw_domain_init(dev_priv, FW_DOMAIN_ID_BLITTER,
1113                                FORCEWAKE_BLITTER_GEN9,
1114                                FORCEWAKE_ACK_BLITTER_GEN9);
1115                 fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA,
1116                                FORCEWAKE_MEDIA_GEN9, FORCEWAKE_ACK_MEDIA_GEN9);
1117         } else if (IS_VALLEYVIEW(dev)) {
1118                 dev_priv->uncore.funcs.force_wake_get = fw_domains_get;
1119                 if (!IS_CHERRYVIEW(dev))
1120                         dev_priv->uncore.funcs.force_wake_put =
1121                                 fw_domains_put_with_fifo;
1122                 else
1123                         dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1124                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1125                                FORCEWAKE_VLV, FORCEWAKE_ACK_VLV);
1126                 fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA,
1127                                FORCEWAKE_MEDIA_VLV, FORCEWAKE_ACK_MEDIA_VLV);
1128         } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
1129                 dev_priv->uncore.funcs.force_wake_get =
1130                         fw_domains_get_with_thread_status;
1131                 dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1132                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1133                                FORCEWAKE_MT, FORCEWAKE_ACK_HSW);
1134         } else if (IS_IVYBRIDGE(dev)) {
1135                 u32 ecobus;
1136
1137                 /* IVB configs may use multi-threaded forcewake */
1138
1139                 /* A small trick here - if the bios hasn't configured
1140                  * MT forcewake, and if the device is in RC6, then
1141                  * force_wake_mt_get will not wake the device and the
1142                  * ECOBUS read will return zero. Which will be
1143                  * (correctly) interpreted by the test below as MT
1144                  * forcewake being disabled.
1145                  */
1146                 dev_priv->uncore.funcs.force_wake_get =
1147                         fw_domains_get_with_thread_status;
1148                 dev_priv->uncore.funcs.force_wake_put =
1149                         fw_domains_put_with_fifo;
1150
1151                 /* We need to init first for ECOBUS access and then
1152                  * determine later if we want to reinit, in case of MT access is
1153                  * not working. In this stage we don't know which flavour this
1154                  * ivb is, so it is better to reset also the gen6 fw registers
1155                  * before the ecobus check.
1156                  */
1157
1158                 __raw_i915_write32(dev_priv, FORCEWAKE, 0);
1159                 __raw_posting_read(dev_priv, ECOBUS);
1160
1161                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1162                                FORCEWAKE_MT, FORCEWAKE_MT_ACK);
1163
1164                 mutex_lock(&dev->struct_mutex);
1165                 fw_domains_get_with_thread_status(dev_priv, FORCEWAKE_ALL);
1166                 ecobus = __raw_i915_read32(dev_priv, ECOBUS);
1167                 fw_domains_put_with_fifo(dev_priv, FORCEWAKE_ALL);
1168                 mutex_unlock(&dev->struct_mutex);
1169
1170                 if (!(ecobus & FORCEWAKE_MT_ENABLE)) {
1171                         DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
1172                         DRM_INFO("when using vblank-synced partial screen updates.\n");
1173                         fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1174                                        FORCEWAKE, FORCEWAKE_ACK);
1175                 }
1176         } else if (IS_GEN6(dev)) {
1177                 dev_priv->uncore.funcs.force_wake_get =
1178                         fw_domains_get_with_thread_status;
1179                 dev_priv->uncore.funcs.force_wake_put =
1180                         fw_domains_put_with_fifo;
1181                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1182                                FORCEWAKE, FORCEWAKE_ACK);
1183         }
1184
1185         /* All future platforms are expected to require complex power gating */
1186         WARN_ON(dev_priv->uncore.fw_domains == 0);
1187 }
1188
1189 void intel_uncore_init(struct drm_device *dev)
1190 {
1191         struct drm_i915_private *dev_priv = dev->dev_private;
1192
1193         i915_check_vgpu(dev);
1194
1195         intel_uncore_ellc_detect(dev);
1196         intel_uncore_fw_domains_init(dev);
1197         __intel_uncore_early_sanitize(dev, false);
1198
1199         switch (INTEL_INFO(dev)->gen) {
1200         default:
1201                 MISSING_CASE(INTEL_INFO(dev)->gen);
1202                 return;
1203         case 9:
1204                 ASSIGN_WRITE_MMIO_VFUNCS(gen9);
1205                 ASSIGN_READ_MMIO_VFUNCS(gen9);
1206                 break;
1207         case 8:
1208                 if (IS_CHERRYVIEW(dev)) {
1209                         ASSIGN_WRITE_MMIO_VFUNCS(chv);
1210                         ASSIGN_READ_MMIO_VFUNCS(chv);
1211
1212                 } else {
1213                         ASSIGN_WRITE_MMIO_VFUNCS(gen8);
1214                         ASSIGN_READ_MMIO_VFUNCS(gen6);
1215                 }
1216                 break;
1217         case 7:
1218         case 6:
1219                 if (IS_HASWELL(dev)) {
1220                         ASSIGN_WRITE_MMIO_VFUNCS(hsw);
1221                 } else {
1222                         ASSIGN_WRITE_MMIO_VFUNCS(gen6);
1223                 }
1224
1225                 if (IS_VALLEYVIEW(dev)) {
1226                         ASSIGN_READ_MMIO_VFUNCS(vlv);
1227                 } else {
1228                         ASSIGN_READ_MMIO_VFUNCS(gen6);
1229                 }
1230                 break;
1231         case 5:
1232                 ASSIGN_WRITE_MMIO_VFUNCS(gen5);
1233                 ASSIGN_READ_MMIO_VFUNCS(gen5);
1234                 break;
1235         case 4:
1236         case 3:
1237         case 2:
1238                 ASSIGN_WRITE_MMIO_VFUNCS(gen2);
1239                 ASSIGN_READ_MMIO_VFUNCS(gen2);
1240                 break;
1241         }
1242
1243         if (intel_vgpu_active(dev)) {
1244                 ASSIGN_WRITE_MMIO_VFUNCS(vgpu);
1245                 ASSIGN_READ_MMIO_VFUNCS(vgpu);
1246         }
1247
1248         i915_check_and_clear_faults(dev);
1249 }
1250 #undef ASSIGN_WRITE_MMIO_VFUNCS
1251 #undef ASSIGN_READ_MMIO_VFUNCS
1252
1253 void intel_uncore_fini(struct drm_device *dev)
1254 {
1255         /* Paranoia: make sure we have disabled everything before we exit. */
1256         intel_uncore_sanitize(dev);
1257         intel_uncore_forcewake_reset(dev, false);
1258 }
1259
1260 #define GEN_RANGE(l, h) GENMASK(h, l)
1261
1262 static const struct register_whitelist {
1263         uint64_t offset;
1264         uint32_t size;
1265         /* supported gens, 0x10 for 4, 0x30 for 4 and 5, etc. */
1266         uint32_t gen_bitmask;
1267 } whitelist[] = {
1268         { RING_TIMESTAMP(RENDER_RING_BASE), 8, GEN_RANGE(4, 9) },
1269 };
1270
1271 int i915_reg_read_ioctl(struct drm_device *dev,
1272                         void *data, struct drm_file *file)
1273 {
1274         struct drm_i915_private *dev_priv = dev->dev_private;
1275         struct drm_i915_reg_read *reg = data;
1276         struct register_whitelist const *entry = whitelist;
1277         unsigned size;
1278         u64 offset;
1279         int i, ret = 0;
1280
1281         for (i = 0; i < ARRAY_SIZE(whitelist); i++, entry++) {
1282                 if (entry->offset == (reg->offset & -entry->size) &&
1283                     (1 << INTEL_INFO(dev)->gen & entry->gen_bitmask))
1284                         break;
1285         }
1286
1287         if (i == ARRAY_SIZE(whitelist))
1288                 return -EINVAL;
1289
1290         /* We use the low bits to encode extra flags as the register should
1291          * be naturally aligned (and those that are not so aligned merely
1292          * limit the available flags for that register).
1293          */
1294         offset = entry->offset;
1295         size = entry->size;
1296         size |= reg->offset ^ offset;
1297
1298         intel_runtime_pm_get(dev_priv);
1299
1300         switch (size) {
1301         case 8 | 1:
1302                 reg->val = I915_READ64_2x32(offset, offset+4);
1303                 break;
1304         case 8:
1305                 reg->val = I915_READ64(offset);
1306                 break;
1307         case 4:
1308                 reg->val = I915_READ(offset);
1309                 break;
1310         case 2:
1311                 reg->val = I915_READ16(offset);
1312                 break;
1313         case 1:
1314                 reg->val = I915_READ8(offset);
1315                 break;
1316         default:
1317                 ret = -EINVAL;
1318                 goto out;
1319         }
1320
1321 out:
1322         intel_runtime_pm_put(dev_priv);
1323         return ret;
1324 }
1325
1326 int i915_get_reset_stats_ioctl(struct drm_device *dev,
1327                                void *data, struct drm_file *file)
1328 {
1329         struct drm_i915_private *dev_priv = dev->dev_private;
1330         struct drm_i915_reset_stats *args = data;
1331         struct i915_ctx_hang_stats *hs;
1332         struct intel_context *ctx;
1333         int ret;
1334
1335         if (args->flags || args->pad)
1336                 return -EINVAL;
1337
1338         if (args->ctx_id == DEFAULT_CONTEXT_HANDLE && !capable(CAP_SYS_ADMIN))
1339                 return -EPERM;
1340
1341         ret = mutex_lock_interruptible(&dev->struct_mutex);
1342         if (ret)
1343                 return ret;
1344
1345         ctx = i915_gem_context_get(file->driver_priv, args->ctx_id);
1346         if (IS_ERR(ctx)) {
1347                 mutex_unlock(&dev->struct_mutex);
1348                 return PTR_ERR(ctx);
1349         }
1350         hs = &ctx->hang_stats;
1351
1352         if (capable(CAP_SYS_ADMIN))
1353                 args->reset_count = i915_reset_count(&dev_priv->gpu_error);
1354         else
1355                 args->reset_count = 0;
1356
1357         args->batch_active = hs->batch_active;
1358         args->batch_pending = hs->batch_pending;
1359
1360         mutex_unlock(&dev->struct_mutex);
1361
1362         return 0;
1363 }
1364
1365 static int i915_reset_complete(struct drm_device *dev)
1366 {
1367         u8 gdrst;
1368         pci_read_config_byte(dev->pdev, I915_GDRST, &gdrst);
1369         return (gdrst & GRDOM_RESET_STATUS) == 0;
1370 }
1371
1372 static int i915_do_reset(struct drm_device *dev)
1373 {
1374         /* assert reset for at least 20 usec */
1375         pci_write_config_byte(dev->pdev, I915_GDRST, GRDOM_RESET_ENABLE);
1376         udelay(20);
1377         pci_write_config_byte(dev->pdev, I915_GDRST, 0);
1378
1379         return wait_for(i915_reset_complete(dev), 500);
1380 }
1381
1382 static int g4x_reset_complete(struct drm_device *dev)
1383 {
1384         u8 gdrst;
1385         pci_read_config_byte(dev->pdev, I915_GDRST, &gdrst);
1386         return (gdrst & GRDOM_RESET_ENABLE) == 0;
1387 }
1388
1389 static int g33_do_reset(struct drm_device *dev)
1390 {
1391         pci_write_config_byte(dev->pdev, I915_GDRST, GRDOM_RESET_ENABLE);
1392         return wait_for(g4x_reset_complete(dev), 500);
1393 }
1394
1395 static int g4x_do_reset(struct drm_device *dev)
1396 {
1397         struct drm_i915_private *dev_priv = dev->dev_private;
1398         int ret;
1399
1400         pci_write_config_byte(dev->pdev, I915_GDRST,
1401                               GRDOM_RENDER | GRDOM_RESET_ENABLE);
1402         ret =  wait_for(g4x_reset_complete(dev), 500);
1403         if (ret)
1404                 return ret;
1405
1406         /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1407         I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) | VCP_UNIT_CLOCK_GATE_DISABLE);
1408         POSTING_READ(VDECCLK_GATE_D);
1409
1410         pci_write_config_byte(dev->pdev, I915_GDRST,
1411                               GRDOM_MEDIA | GRDOM_RESET_ENABLE);
1412         ret =  wait_for(g4x_reset_complete(dev), 500);
1413         if (ret)
1414                 return ret;
1415
1416         /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1417         I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) & ~VCP_UNIT_CLOCK_GATE_DISABLE);
1418         POSTING_READ(VDECCLK_GATE_D);
1419
1420         pci_write_config_byte(dev->pdev, I915_GDRST, 0);
1421
1422         return 0;
1423 }
1424
1425 static int ironlake_do_reset(struct drm_device *dev)
1426 {
1427         struct drm_i915_private *dev_priv = dev->dev_private;
1428         int ret;
1429
1430         I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
1431                    ILK_GRDOM_RENDER | ILK_GRDOM_RESET_ENABLE);
1432         ret = wait_for((I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) &
1433                         ILK_GRDOM_RESET_ENABLE) == 0, 500);
1434         if (ret)
1435                 return ret;
1436
1437         I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
1438                    ILK_GRDOM_MEDIA | ILK_GRDOM_RESET_ENABLE);
1439         ret = wait_for((I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) &
1440                         ILK_GRDOM_RESET_ENABLE) == 0, 500);
1441         if (ret)
1442                 return ret;
1443
1444         I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR, 0);
1445
1446         return 0;
1447 }
1448
1449 static int gen6_do_reset(struct drm_device *dev)
1450 {
1451         struct drm_i915_private *dev_priv = dev->dev_private;
1452         int     ret;
1453
1454         /* Reset the chip */
1455
1456         /* GEN6_GDRST is not in the gt power well, no need to check
1457          * for fifo space for the write or forcewake the chip for
1458          * the read
1459          */
1460         __raw_i915_write32(dev_priv, GEN6_GDRST, GEN6_GRDOM_FULL);
1461
1462         /* Spin waiting for the device to ack the reset request */
1463         ret = wait_for((__raw_i915_read32(dev_priv, GEN6_GDRST) & GEN6_GRDOM_FULL) == 0, 500);
1464
1465         intel_uncore_forcewake_reset(dev, true);
1466
1467         return ret;
1468 }
1469
1470 int intel_gpu_reset(struct drm_device *dev)
1471 {
1472         if (INTEL_INFO(dev)->gen >= 6)
1473                 return gen6_do_reset(dev);
1474         else if (IS_GEN5(dev))
1475                 return ironlake_do_reset(dev);
1476         else if (IS_G4X(dev))
1477                 return g4x_do_reset(dev);
1478         else if (IS_G33(dev))
1479                 return g33_do_reset(dev);
1480         else if (INTEL_INFO(dev)->gen >= 3)
1481                 return i915_do_reset(dev);
1482         else
1483                 return -ENODEV;
1484 }
1485
1486 void intel_uncore_check_errors(struct drm_device *dev)
1487 {
1488         struct drm_i915_private *dev_priv = dev->dev_private;
1489
1490         if (HAS_FPGA_DBG_UNCLAIMED(dev) &&
1491             (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
1492                 DRM_ERROR("Unclaimed register before interrupt\n");
1493                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
1494         }
1495 }