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 <asm/iosf_mbi.h>
  29 #include <linux/pm_runtime.h>
  30
  31 #define FORCEWAKE_ACK_TIMEOUT_MS 50
  32 #define GT_FIFO_TIMEOUT_MS       10
  33
  34 #define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32((dev_priv__), (reg__))
  35
  36 static const char * const forcewake_domain_names[] = {
  37         "render",
  38         "blitter",
  39         "media",
  40         "vdbox0",
  41         "vdbox1",
  42         "vdbox2",
  43         "vdbox3",
  44         "vebox0",
  45         "vebox1",
  46 };
  47
  48 const char *
  49 intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id)
  50 {
  51         BUILD_BUG_ON(ARRAY_SIZE(forcewake_domain_names) != FW_DOMAIN_ID_COUNT);
  52
  53         if (id >= 0 && id < FW_DOMAIN_ID_COUNT)
  54                 return forcewake_domain_names[id];
  55
  56         WARN_ON(id);
  57
  58         return "unknown";
  59 }
  60
  61 static inline void
  62 fw_domain_reset(struct drm_i915_private *i915,
  63                 const struct intel_uncore_forcewake_domain *d)
  64 {
  65         /*
  66          * We don't really know if the powerwell for the forcewake domain we are
  67          * trying to reset here does exist at this point (engines could be fused
  68          * off in ICL+), so no waiting for acks
  69          */
  70         __raw_i915_write32(i915, d->reg_set, i915->uncore.fw_reset);
  71 }
  72
  73 static inline void
  74 fw_domain_arm_timer(struct intel_uncore_forcewake_domain *d)
  75 {
  76         d->wake_count++;
  77         hrtimer_start_range_ns(&d->timer,
  78                                NSEC_PER_MSEC,
  79                                NSEC_PER_MSEC,
  80                                HRTIMER_MODE_REL);
  81 }
  82
  83 static inline int
  84 __wait_for_ack(const struct drm_i915_private *i915,
  85                const struct intel_uncore_forcewake_domain *d,
  86                const u32 ack,
  87                const u32 value)
  88 {
  89         return wait_for_atomic((__raw_i915_read32(i915, d->reg_ack) & ack) == value,
  90                                FORCEWAKE_ACK_TIMEOUT_MS);
  91 }
  92
  93 static inline int
  94 wait_ack_clear(const struct drm_i915_private *i915,
  95                const struct intel_uncore_forcewake_domain *d,
  96                const u32 ack)
  97 {
  98         return __wait_for_ack(i915, d, ack, 0);
  99 }
 100
 101 static inline int
 102 wait_ack_set(const struct drm_i915_private *i915,
 103              const struct intel_uncore_forcewake_domain *d,
 104              const u32 ack)
 105 {
 106         return __wait_for_ack(i915, d, ack, ack);
 107 }
 108
 109 static inline void
 110 fw_domain_wait_ack_clear(const struct drm_i915_private *i915,
 111                          const struct intel_uncore_forcewake_domain *d)
 112 {
 113         if (wait_ack_clear(i915, d, FORCEWAKE_KERNEL))
 114                 DRM_ERROR("%s: timed out waiting for forcewake ack to clear.\n",
 115                           intel_uncore_forcewake_domain_to_str(d->id));
 116 }
 117
 118 enum ack_type {
 119         ACK_CLEAR = 0,
 120         ACK_SET
 121 };
 122
 123 static int
 124 fw_domain_wait_ack_with_fallback(const struct drm_i915_private *i915,
 125                                  const struct intel_uncore_forcewake_domain *d,
 126                                  const enum ack_type type)
 127 {
 128         const u32 ack_bit = FORCEWAKE_KERNEL;
 129         const u32 value = type == ACK_SET ? ack_bit : 0;
 130         unsigned int pass;
 131         bool ack_detected;
 132
 133         /*
 134          * There is a possibility of driver's wake request colliding
 135          * with hardware's own wake requests and that can cause
 136          * hardware to not deliver the driver's ack message.
 137          *
 138          * Use a fallback bit toggle to kick the gpu state machine
 139          * in the hope that the original ack will be delivered along with
 140          * the fallback ack.
 141          *
 142          * This workaround is described in HSDES #1604254524 and it's known as:
 143          * WaRsForcewakeAddDelayForAck:skl,bxt,kbl,glk,cfl,cnl,icl
 144          * although the name is a bit misleading.
 145          */
 146
 147         pass = 1;
 148         do {
 149                 wait_ack_clear(i915, d, FORCEWAKE_KERNEL_FALLBACK);
 150
 151                 __raw_i915_write32(i915, d->reg_set,
 152                                    _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL_FALLBACK));
 153                 /* Give gt some time to relax before the polling frenzy */
 154                 udelay(10 * pass);
 155                 wait_ack_set(i915, d, FORCEWAKE_KERNEL_FALLBACK);
 156
 157                 ack_detected = (__raw_i915_read32(i915, d->reg_ack) & ack_bit) == value;
 158
 159                 __raw_i915_write32(i915, d->reg_set,
 160                                    _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL_FALLBACK));
 161         } while (!ack_detected && pass++ < 10);
 162
 163         DRM_DEBUG_DRIVER("%s had to use fallback to %s ack, 0x%x (passes %u)\n",
 164                          intel_uncore_forcewake_domain_to_str(d->id),
 165                          type == ACK_SET ? "set" : "clear",
 166                          __raw_i915_read32(i915, d->reg_ack),
 167                          pass);
 168
 169         return ack_detected ? 0 : -ETIMEDOUT;
 170 }
 171
 172 static inline void
 173 fw_domain_wait_ack_clear_fallback(const struct drm_i915_private *i915,
 174                                   const struct intel_uncore_forcewake_domain *d)
 175 {
 176         if (likely(!wait_ack_clear(i915, d, FORCEWAKE_KERNEL)))
 177                 return;
 178
 179         if (fw_domain_wait_ack_with_fallback(i915, d, ACK_CLEAR))
 180                 fw_domain_wait_ack_clear(i915, d);
 181 }
 182
 183 static inline void
 184 fw_domain_get(struct drm_i915_private *i915,
 185               const struct intel_uncore_forcewake_domain *d)
 186 {
 187         __raw_i915_write32(i915, d->reg_set, i915->uncore.fw_set);
 188 }
 189
 190 static inline void
 191 fw_domain_wait_ack_set(const struct drm_i915_private *i915,
 192                        const struct intel_uncore_forcewake_domain *d)
 193 {
 194         if (wait_ack_set(i915, d, FORCEWAKE_KERNEL))
 195                 DRM_ERROR("%s: timed out waiting for forcewake ack request.\n",
 196                           intel_uncore_forcewake_domain_to_str(d->id));
 197 }
 198
 199 static inline void
 200 fw_domain_wait_ack_set_fallback(const struct drm_i915_private *i915,
 201                                 const struct intel_uncore_forcewake_domain *d)
 202 {
 203         if (likely(!wait_ack_set(i915, d, FORCEWAKE_KERNEL)))
 204                 return;
 205
 206         if (fw_domain_wait_ack_with_fallback(i915, d, ACK_SET))
 207                 fw_domain_wait_ack_set(i915, d);
 208 }
 209
 210 static inline void
 211 fw_domain_put(const struct drm_i915_private *i915,
 212               const struct intel_uncore_forcewake_domain *d)
 213 {
 214         __raw_i915_write32(i915, d->reg_set, i915->uncore.fw_clear);
 215 }
 216
 217 static void
 218 fw_domains_get(struct drm_i915_private *i915, enum forcewake_domains fw_domains)
 219 {
 220         struct intel_uncore_forcewake_domain *d;
 221         unsigned int tmp;
 222
 223         GEM_BUG_ON(fw_domains & ~i915->uncore.fw_domains);
 224
 225         for_each_fw_domain_masked(d, fw_domains, i915, tmp) {
 226                 fw_domain_wait_ack_clear(i915, d);
 227                 fw_domain_get(i915, d);
 228         }
 229
 230         for_each_fw_domain_masked(d, fw_domains, i915, tmp)
 231                 fw_domain_wait_ack_set(i915, d);
 232
 233         i915->uncore.fw_domains_active |= fw_domains;
 234 }
 235
 236 static void
 237 fw_domains_get_with_fallback(struct drm_i915_private *i915,
 238                              enum forcewake_domains fw_domains)
 239 {
 240         struct intel_uncore_forcewake_domain *d;
 241         unsigned int tmp;
 242
 243         GEM_BUG_ON(fw_domains & ~i915->uncore.fw_domains);
 244
 245         for_each_fw_domain_masked(d, fw_domains, i915, tmp) {
 246                 fw_domain_wait_ack_clear_fallback(i915, d);
 247                 fw_domain_get(i915, d);
 248         }
 249
 250         for_each_fw_domain_masked(d, fw_domains, i915, tmp)
 251                 fw_domain_wait_ack_set_fallback(i915, d);
 252
 253         i915->uncore.fw_domains_active |= fw_domains;
 254 }
 255
 256 static void
 257 fw_domains_put(struct drm_i915_private *i915, enum forcewake_domains fw_domains)
 258 {
 259         struct intel_uncore_forcewake_domain *d;
 260         unsigned int tmp;
 261
 262         GEM_BUG_ON(fw_domains & ~i915->uncore.fw_domains);
 263
 264         for_each_fw_domain_masked(d, fw_domains, i915, tmp)
 265                 fw_domain_put(i915, d);
 266
 267         i915->uncore.fw_domains_active &= ~fw_domains;
 268 }
 269
 270 static void
 271 fw_domains_reset(struct drm_i915_private *i915,
 272                  enum forcewake_domains fw_domains)
 273 {
 274         struct intel_uncore_forcewake_domain *d;
 275         unsigned int tmp;
 276
 277         if (!fw_domains)
 278                 return;
 279
 280         GEM_BUG_ON(fw_domains & ~i915->uncore.fw_domains);
 281
 282         for_each_fw_domain_masked(d, fw_domains, i915, tmp)
 283                 fw_domain_reset(i915, d);
 284 }
 285
 286 static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
 287 {
 288         /* w/a for a sporadic read returning 0 by waiting for the GT
 289          * thread to wake up.
 290          */
 291         if (wait_for_atomic_us((__raw_i915_read32(dev_priv, GEN6_GT_THREAD_STATUS_REG) &
 292                                 GEN6_GT_THREAD_STATUS_CORE_MASK) == 0, 500))
 293                 DRM_ERROR("GT thread status wait timed out\n");
 294 }
 295
 296 static void fw_domains_get_with_thread_status(struct drm_i915_private *dev_priv,
 297                                               enum forcewake_domains fw_domains)
 298 {
 299         fw_domains_get(dev_priv, fw_domains);
 300
 301         /* WaRsForcewakeWaitTC0:snb,ivb,hsw,bdw,vlv */
 302         __gen6_gt_wait_for_thread_c0(dev_priv);
 303 }
 304
 305 static inline u32 fifo_free_entries(struct drm_i915_private *dev_priv)
 306 {
 307         u32 count = __raw_i915_read32(dev_priv, GTFIFOCTL);
 308
 309         return count & GT_FIFO_FREE_ENTRIES_MASK;
 310 }
 311
 312 static void __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
 313 {
 314         u32 n;
 315
 316         /* On VLV, FIFO will be shared by both SW and HW.
 317          * So, we need to read the FREE_ENTRIES everytime */
 318         if (IS_VALLEYVIEW(dev_priv))
 319                 n = fifo_free_entries(dev_priv);
 320         else
 321                 n = dev_priv->uncore.fifo_count;
 322
 323         if (n <= GT_FIFO_NUM_RESERVED_ENTRIES) {
 324                 if (wait_for_atomic((n = fifo_free_entries(dev_priv)) >
 325                                     GT_FIFO_NUM_RESERVED_ENTRIES,
 326                                     GT_FIFO_TIMEOUT_MS)) {
 327                         DRM_DEBUG("GT_FIFO timeout, entries: %u\n", n);
 328                         return;
 329                 }
 330         }
 331
 332         dev_priv->uncore.fifo_count = n - 1;
 333 }
 334
 335 static enum hrtimer_restart
 336 intel_uncore_fw_release_timer(struct hrtimer *timer)
 337 {
 338         struct intel_uncore_forcewake_domain *domain =
 339                container_of(timer, struct intel_uncore_forcewake_domain, timer);
 340         struct drm_i915_private *dev_priv =
 341                 container_of(domain, struct drm_i915_private, uncore.fw_domain[domain->id]);
 342         unsigned long irqflags;
 343
 344         assert_rpm_device_not_suspended(dev_priv);
 345
 346         if (xchg(&domain->active, false))
 347                 return HRTIMER_RESTART;
 348
 349         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 350         if (WARN_ON(domain->wake_count == 0))
 351                 domain->wake_count++;
 352
 353         if (--domain->wake_count == 0)
 354                 dev_priv->uncore.funcs.force_wake_put(dev_priv, domain->mask);
 355
 356         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 357
 358         return HRTIMER_NORESTART;
 359 }
 360
 361 /* Note callers must have acquired the PUNIT->PMIC bus, before calling this. */
 362 static void intel_uncore_forcewake_reset(struct drm_i915_private *dev_priv,
 363                                          bool restore)
 364 {
 365         unsigned long irqflags;
 366         struct intel_uncore_forcewake_domain *domain;
 367         int retry_count = 100;
 368         enum forcewake_domains fw, active_domains;
 369
 370         iosf_mbi_assert_punit_acquired();
 371
 372         /* Hold uncore.lock across reset to prevent any register access
 373          * with forcewake not set correctly. Wait until all pending
 374          * timers are run before holding.
 375          */
 376         while (1) {
 377                 unsigned int tmp;
 378
 379                 active_domains = 0;
 380
 381                 for_each_fw_domain(domain, dev_priv, tmp) {
 382                         smp_store_mb(domain->active, false);
 383                         if (hrtimer_cancel(&domain->timer) == 0)
 384                                 continue;
 385
 386                         intel_uncore_fw_release_timer(&domain->timer);
 387                 }
 388
 389                 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 390
 391                 for_each_fw_domain(domain, dev_priv, tmp) {
 392                         if (hrtimer_active(&domain->timer))
 393                                 active_domains |= domain->mask;
 394                 }
 395
 396                 if (active_domains == 0)
 397                         break;
 398
 399                 if (--retry_count == 0) {
 400                         DRM_ERROR("Timed out waiting for forcewake timers to finish\n");
 401                         break;
 402                 }
 403
 404                 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 405                 cond_resched();
 406         }
 407
 408         WARN_ON(active_domains);
 409
 410         fw = dev_priv->uncore.fw_domains_active;
 411         if (fw)
 412                 dev_priv->uncore.funcs.force_wake_put(dev_priv, fw);
 413
 414         fw_domains_reset(dev_priv, dev_priv->uncore.fw_domains);
 415
 416         if (restore) { /* If reset with a user forcewake, try to restore */
 417                 if (fw)
 418                         dev_priv->uncore.funcs.force_wake_get(dev_priv, fw);
 419
 420                 if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv))
 421                         dev_priv->uncore.fifo_count =
 422                                 fifo_free_entries(dev_priv);
 423         }
 424
 425         if (!restore)
 426                 assert_forcewakes_inactive(dev_priv);
 427
 428         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 429 }
 430
 431 static u64 gen9_edram_size(struct drm_i915_private *dev_priv)
 432 {
 433         const unsigned int ways[8] = { 4, 8, 12, 16, 16, 16, 16, 16 };
 434         const unsigned int sets[4] = { 1, 1, 2, 2 };
 435         const u32 cap = dev_priv->edram_cap;
 436
 437         return EDRAM_NUM_BANKS(cap) *
 438                 ways[EDRAM_WAYS_IDX(cap)] *
 439                 sets[EDRAM_SETS_IDX(cap)] *
 440                 1024 * 1024;
 441 }
 442
 443 u64 intel_uncore_edram_size(struct drm_i915_private *dev_priv)
 444 {
 445         if (!HAS_EDRAM(dev_priv))
 446                 return 0;
 447
 448         /* The needed capability bits for size calculation
 449          * are not there with pre gen9 so return 128MB always.
 450          */
 451         if (INTEL_GEN(dev_priv) < 9)
 452                 return 128 * 1024 * 1024;
 453
 454         return gen9_edram_size(dev_priv);
 455 }
 456
 457 static void intel_uncore_edram_detect(struct drm_i915_private *dev_priv)
 458 {
 459         if (IS_HASWELL(dev_priv) ||
 460             IS_BROADWELL(dev_priv) ||
 461             INTEL_GEN(dev_priv) >= 9) {
 462                 dev_priv->edram_cap = __raw_i915_read32(dev_priv,
 463                                                         HSW_EDRAM_CAP);
 464
 465                 /* NB: We can't write IDICR yet because we do not have gt funcs
 466                  * set up */
 467         } else {
 468                 dev_priv->edram_cap = 0;
 469         }
 470
 471         if (HAS_EDRAM(dev_priv))
 472                 DRM_INFO("Found %lluMB of eDRAM\n",
 473                          intel_uncore_edram_size(dev_priv) / (1024 * 1024));
 474 }
 475
 476 static bool
 477 fpga_check_for_unclaimed_mmio(struct drm_i915_private *dev_priv)
 478 {
 479         u32 dbg;
 480
 481         dbg = __raw_i915_read32(dev_priv, FPGA_DBG);
 482         if (likely(!(dbg & FPGA_DBG_RM_NOCLAIM)))
 483                 return false;
 484
 485         __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 486
 487         return true;
 488 }
 489
 490 static bool
 491 vlv_check_for_unclaimed_mmio(struct drm_i915_private *dev_priv)
 492 {
 493         u32 cer;
 494
 495         cer = __raw_i915_read32(dev_priv, CLAIM_ER);
 496         if (likely(!(cer & (CLAIM_ER_OVERFLOW | CLAIM_ER_CTR_MASK))))
 497                 return false;
 498
 499         __raw_i915_write32(dev_priv, CLAIM_ER, CLAIM_ER_CLR);
 500
 501         return true;
 502 }
 503
 504 static bool
 505 gen6_check_for_fifo_debug(struct drm_i915_private *dev_priv)
 506 {
 507         u32 fifodbg;
 508
 509         fifodbg = __raw_i915_read32(dev_priv, GTFIFODBG);
 510
 511         if (unlikely(fifodbg)) {
 512                 DRM_DEBUG_DRIVER("GTFIFODBG = 0x08%x\n", fifodbg);
 513                 __raw_i915_write32(dev_priv, GTFIFODBG, fifodbg);
 514         }
 515
 516         return fifodbg;
 517 }
 518
 519 static bool
 520 check_for_unclaimed_mmio(struct drm_i915_private *dev_priv)
 521 {
 522         bool ret = false;
 523
 524         if (HAS_FPGA_DBG_UNCLAIMED(dev_priv))
 525                 ret |= fpga_check_for_unclaimed_mmio(dev_priv);
 526
 527         if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 528                 ret |= vlv_check_for_unclaimed_mmio(dev_priv);
 529
 530         if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv))
 531                 ret |= gen6_check_for_fifo_debug(dev_priv);
 532
 533         return ret;
 534 }
 535
 536 static void __intel_uncore_early_sanitize(struct drm_i915_private *dev_priv,
 537                                           bool restore_forcewake)
 538 {
 539         /* clear out unclaimed reg detection bit */
 540         if (check_for_unclaimed_mmio(dev_priv))
 541                 DRM_DEBUG("unclaimed mmio detected on uncore init, clearing\n");
 542
 543         /* WaDisableShadowRegForCpd:chv */
 544         if (IS_CHERRYVIEW(dev_priv)) {
 545                 __raw_i915_write32(dev_priv, GTFIFOCTL,
 546                                    __raw_i915_read32(dev_priv, GTFIFOCTL) |
 547                                    GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL |
 548                                    GT_FIFO_CTL_RC6_POLICY_STALL);
 549         }
 550
 551         iosf_mbi_punit_acquire();
 552         intel_uncore_forcewake_reset(dev_priv, restore_forcewake);
 553         iosf_mbi_punit_release();
 554 }
 555
 556 void intel_uncore_suspend(struct drm_i915_private *dev_priv)
 557 {
 558         iosf_mbi_punit_acquire();
 559         iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
 560                 &dev_priv->uncore.pmic_bus_access_nb);
 561         intel_uncore_forcewake_reset(dev_priv, false);
 562         iosf_mbi_punit_release();
 563 }
 564
 565 void intel_uncore_resume_early(struct drm_i915_private *dev_priv)
 566 {
 567         __intel_uncore_early_sanitize(dev_priv, true);
 568         iosf_mbi_register_pmic_bus_access_notifier(
 569                 &dev_priv->uncore.pmic_bus_access_nb);
 570         i915_check_and_clear_faults(dev_priv);
 571 }
 572
 573 void intel_uncore_runtime_resume(struct drm_i915_private *dev_priv)
 574 {
 575         iosf_mbi_register_pmic_bus_access_notifier(
 576                 &dev_priv->uncore.pmic_bus_access_nb);
 577 }
 578
 579 void intel_uncore_sanitize(struct drm_i915_private *dev_priv)
 580 {
 581         /* BIOS often leaves RC6 enabled, but disable it for hw init */
 582         intel_sanitize_gt_powersave(dev_priv);
 583 }
 584
 585 static void __intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
 586                                          enum forcewake_domains fw_domains)
 587 {
 588         struct intel_uncore_forcewake_domain *domain;
 589         unsigned int tmp;
 590
 591         fw_domains &= dev_priv->uncore.fw_domains;
 592
 593         for_each_fw_domain_masked(domain, fw_domains, dev_priv, tmp) {
 594                 if (domain->wake_count++) {
 595                         fw_domains &= ~domain->mask;
 596                         domain->active = true;
 597                 }
 598         }
 599
 600         if (fw_domains)
 601                 dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
 602 }
 603
 604 /**
 605  * intel_uncore_forcewake_get - grab forcewake domain references
 606  * @dev_priv: i915 device instance
 607  * @fw_domains: forcewake domains to get reference on
 608  *
 609  * This function can be used get GT's forcewake domain references.
 610  * Normal register access will handle the forcewake domains automatically.
 611  * However if some sequence requires the GT to not power down a particular
 612  * forcewake domains this function should be called at the beginning of the
 613  * sequence. And subsequently the reference should be dropped by symmetric
 614  * call to intel_unforce_forcewake_put(). Usually caller wants all the domains
 615  * to be kept awake so the @fw_domains would be then FORCEWAKE_ALL.
 616  */
 617 void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
 618                                 enum forcewake_domains fw_domains)
 619 {
 620         unsigned long irqflags;
 621
 622         if (!dev_priv->uncore.funcs.force_wake_get)
 623                 return;
 624
 625         assert_rpm_wakelock_held(dev_priv);
 626
 627         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 628         __intel_uncore_forcewake_get(dev_priv, fw_domains);
 629         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 630 }
 631
 632 /**
 633  * intel_uncore_forcewake_user_get - claim forcewake on behalf of userspace
 634  * @dev_priv: i915 device instance
 635  *
 636  * This function is a wrapper around intel_uncore_forcewake_get() to acquire
 637  * the GT powerwell and in the process disable our debugging for the
 638  * duration of userspace's bypass.
 639  */
 640 void intel_uncore_forcewake_user_get(struct drm_i915_private *dev_priv)
 641 {
 642         spin_lock_irq(&dev_priv->uncore.lock);
 643         if (!dev_priv->uncore.user_forcewake.count++) {
 644                 intel_uncore_forcewake_get__locked(dev_priv, FORCEWAKE_ALL);
 645
 646                 /* Save and disable mmio debugging for the user bypass */
 647                 dev_priv->uncore.user_forcewake.saved_mmio_check =
 648                         dev_priv->uncore.unclaimed_mmio_check;
 649                 dev_priv->uncore.user_forcewake.saved_mmio_debug =
 650                         i915_modparams.mmio_debug;
 651
 652                 dev_priv->uncore.unclaimed_mmio_check = 0;
 653                 i915_modparams.mmio_debug = 0;
 654         }
 655         spin_unlock_irq(&dev_priv->uncore.lock);
 656 }
 657
 658 /**
 659  * intel_uncore_forcewake_user_put - release forcewake on behalf of userspace
 660  * @dev_priv: i915 device instance
 661  *
 662  * This function complements intel_uncore_forcewake_user_get() and releases
 663  * the GT powerwell taken on behalf of the userspace bypass.
 664  */
 665 void intel_uncore_forcewake_user_put(struct drm_i915_private *dev_priv)
 666 {
 667         spin_lock_irq(&dev_priv->uncore.lock);
 668         if (!--dev_priv->uncore.user_forcewake.count) {
 669                 if (intel_uncore_unclaimed_mmio(dev_priv))
 670                         dev_info(dev_priv->drm.dev,
 671                                  "Invalid mmio detected during user access\n");
 672
 673                 dev_priv->uncore.unclaimed_mmio_check =
 674                         dev_priv->uncore.user_forcewake.saved_mmio_check;
 675                 i915_modparams.mmio_debug =
 676                         dev_priv->uncore.user_forcewake.saved_mmio_debug;
 677
 678                 intel_uncore_forcewake_put__locked(dev_priv, FORCEWAKE_ALL);
 679         }
 680         spin_unlock_irq(&dev_priv->uncore.lock);
 681 }
 682
 683 /**
 684  * intel_uncore_forcewake_get__locked - grab forcewake domain references
 685  * @dev_priv: i915 device instance
 686  * @fw_domains: forcewake domains to get reference on
 687  *
 688  * See intel_uncore_forcewake_get(). This variant places the onus
 689  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
 690  */
 691 void intel_uncore_forcewake_get__locked(struct drm_i915_private *dev_priv,
 692                                         enum forcewake_domains fw_domains)
 693 {
 694         lockdep_assert_held(&dev_priv->uncore.lock);
 695
 696         if (!dev_priv->uncore.funcs.force_wake_get)
 697                 return;
 698
 699         __intel_uncore_forcewake_get(dev_priv, fw_domains);
 700 }
 701
 702 static void __intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
 703                                          enum forcewake_domains fw_domains)
 704 {
 705         struct intel_uncore_forcewake_domain *domain;
 706         unsigned int tmp;
 707
 708         fw_domains &= dev_priv->uncore.fw_domains;
 709
 710         for_each_fw_domain_masked(domain, fw_domains, dev_priv, tmp) {
 711                 if (WARN_ON(domain->wake_count == 0))
 712                         continue;
 713
 714                 if (--domain->wake_count) {
 715                         domain->active = true;
 716                         continue;
 717                 }
 718
 719                 fw_domain_arm_timer(domain);
 720         }
 721 }
 722
 723 /**
 724  * intel_uncore_forcewake_put - release a forcewake domain reference
 725  * @dev_priv: i915 device instance
 726  * @fw_domains: forcewake domains to put references
 727  *
 728  * This function drops the device-level forcewakes for specified
 729  * domains obtained by intel_uncore_forcewake_get().
 730  */
 731 void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
 732                                 enum forcewake_domains fw_domains)
 733 {
 734         unsigned long irqflags;
 735
 736         if (!dev_priv->uncore.funcs.force_wake_put)
 737                 return;
 738
 739         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 740         __intel_uncore_forcewake_put(dev_priv, fw_domains);
 741         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 742 }
 743
 744 /**
 745  * intel_uncore_forcewake_put__locked - grab forcewake domain references
 746  * @dev_priv: i915 device instance
 747  * @fw_domains: forcewake domains to get reference on
 748  *
 749  * See intel_uncore_forcewake_put(). This variant places the onus
 750  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
 751  */
 752 void intel_uncore_forcewake_put__locked(struct drm_i915_private *dev_priv,
 753                                         enum forcewake_domains fw_domains)
 754 {
 755         lockdep_assert_held(&dev_priv->uncore.lock);
 756
 757         if (!dev_priv->uncore.funcs.force_wake_put)
 758                 return;
 759
 760         __intel_uncore_forcewake_put(dev_priv, fw_domains);
 761 }
 762
 763 void assert_forcewakes_inactive(struct drm_i915_private *dev_priv)
 764 {
 765         if (!dev_priv->uncore.funcs.force_wake_get)
 766                 return;
 767
 768         WARN(dev_priv->uncore.fw_domains_active,
 769              "Expected all fw_domains to be inactive, but %08x are still on\n",
 770              dev_priv->uncore.fw_domains_active);
 771 }
 772
 773 void assert_forcewakes_active(struct drm_i915_private *dev_priv,
 774                               enum forcewake_domains fw_domains)
 775 {
 776         if (!dev_priv->uncore.funcs.force_wake_get)
 777                 return;
 778
 779         assert_rpm_wakelock_held(dev_priv);
 780
 781         fw_domains &= dev_priv->uncore.fw_domains;
 782         WARN(fw_domains & ~dev_priv->uncore.fw_domains_active,
 783              "Expected %08x fw_domains to be active, but %08x are off\n",
 784              fw_domains, fw_domains & ~dev_priv->uncore.fw_domains_active);
 785 }
 786
 787 /* We give fast paths for the really cool registers */
 788 #define NEEDS_FORCE_WAKE(reg) ((reg) < 0x40000)
 789
 790 #define GEN11_NEEDS_FORCE_WAKE(reg) \
 791         ((reg) < 0x40000 || ((reg) >= 0x1c0000 && (reg) < 0x1dc000))
 792
 793 #define __gen6_reg_read_fw_domains(offset) \
 794 ({ \
 795         enum forcewake_domains __fwd; \
 796         if (NEEDS_FORCE_WAKE(offset)) \
 797                 __fwd = FORCEWAKE_RENDER; \
 798         else \
 799                 __fwd = 0; \
 800         __fwd; \
 801 })
 802
 803 static int fw_range_cmp(u32 offset, const struct intel_forcewake_range *entry)
 804 {
 805         if (offset < entry->start)
 806                 return -1;
 807         else if (offset > entry->end)
 808                 return 1;
 809         else
 810                 return 0;
 811 }
 812
 813 /* Copied and "macroized" from lib/bsearch.c */
 814 #define BSEARCH(key, base, num, cmp) ({                                 \
 815         unsigned int start__ = 0, end__ = (num);                        \
 816         typeof(base) result__ = NULL;                                   \
 817         while (start__ < end__) {                                       \
 818                 unsigned int mid__ = start__ + (end__ - start__) / 2;   \
 819                 int ret__ = (cmp)((key), (base) + mid__);               \
 820                 if (ret__ < 0) {                                        \
 821                         end__ = mid__;                                  \
 822                 } else if (ret__ > 0) {                                 \
 823                         start__ = mid__ + 1;                            \
 824                 } else {                                                \
 825                         result__ = (base) + mid__;                      \
 826                         break;                                          \
 827                 }                                                       \
 828         }                                                               \
 829         result__;                                                       \
 830 })
 831
 832 static enum forcewake_domains
 833 find_fw_domain(struct drm_i915_private *dev_priv, u32 offset)
 834 {
 835         const struct intel_forcewake_range *entry;
 836
 837         entry = BSEARCH(offset,
 838                         dev_priv->uncore.fw_domains_table,
 839                         dev_priv->uncore.fw_domains_table_entries,
 840                         fw_range_cmp);
 841
 842         if (!entry)
 843                 return 0;
 844
 845         /*
 846          * The list of FW domains depends on the SKU in gen11+ so we
 847          * can't determine it statically. We use FORCEWAKE_ALL and
 848          * translate it here to the list of available domains.
 849          */
 850         if (entry->domains == FORCEWAKE_ALL)
 851                 return dev_priv->uncore.fw_domains;
 852
 853         WARN(entry->domains & ~dev_priv->uncore.fw_domains,
 854              "Uninitialized forcewake domain(s) 0x%x accessed at 0x%x\n",
 855              entry->domains & ~dev_priv->uncore.fw_domains, offset);
 856
 857         return entry->domains;
 858 }
 859
 860 #define GEN_FW_RANGE(s, e, d) \
 861         { .start = (s), .end = (e), .domains = (d) }
 862
 863 #define HAS_FWTABLE(dev_priv) \
 864         (INTEL_GEN(dev_priv) >= 9 || \
 865          IS_CHERRYVIEW(dev_priv) || \
 866          IS_VALLEYVIEW(dev_priv))
 867
 868 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
 869 static const struct intel_forcewake_range __vlv_fw_ranges[] = {
 870         GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
 871         GEN_FW_RANGE(0x5000, 0x7fff, FORCEWAKE_RENDER),
 872         GEN_FW_RANGE(0xb000, 0x11fff, FORCEWAKE_RENDER),
 873         GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
 874         GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_MEDIA),
 875         GEN_FW_RANGE(0x2e000, 0x2ffff, FORCEWAKE_RENDER),
 876         GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
 877 };
 878
 879 #define __fwtable_reg_read_fw_domains(offset) \
 880 ({ \
 881         enum forcewake_domains __fwd = 0; \
 882         if (NEEDS_FORCE_WAKE((offset))) \
 883                 __fwd = find_fw_domain(dev_priv, offset); \
 884         __fwd; \
 885 })
 886
 887 #define __gen11_fwtable_reg_read_fw_domains(offset) \
 888 ({ \
 889         enum forcewake_domains __fwd = 0; \
 890         if (GEN11_NEEDS_FORCE_WAKE((offset))) \
 891                 __fwd = find_fw_domain(dev_priv, offset); \
 892         __fwd; \
 893 })
 894
 895 /* *Must* be sorted by offset! See intel_shadow_table_check(). */
 896 static const i915_reg_t gen8_shadowed_regs[] = {
 897         RING_TAIL(RENDER_RING_BASE),    /* 0x2000 (base) */
 898         GEN6_RPNSWREQ,                  /* 0xA008 */
 899         GEN6_RC_VIDEO_FREQ,             /* 0xA00C */
 900         RING_TAIL(GEN6_BSD_RING_BASE),  /* 0x12000 (base) */
 901         RING_TAIL(VEBOX_RING_BASE),     /* 0x1a000 (base) */
 902         RING_TAIL(BLT_RING_BASE),       /* 0x22000 (base) */
 903         /* TODO: Other registers are not yet used */
 904 };
 905
 906 static const i915_reg_t gen11_shadowed_regs[] = {
 907         RING_TAIL(RENDER_RING_BASE),            /* 0x2000 (base) */
 908         GEN6_RPNSWREQ,                          /* 0xA008 */
 909         GEN6_RC_VIDEO_FREQ,                     /* 0xA00C */
 910         RING_TAIL(BLT_RING_BASE),               /* 0x22000 (base) */
 911         RING_TAIL(GEN11_BSD_RING_BASE),         /* 0x1C0000 (base) */
 912         RING_TAIL(GEN11_BSD2_RING_BASE),        /* 0x1C4000 (base) */
 913         RING_TAIL(GEN11_VEBOX_RING_BASE),       /* 0x1C8000 (base) */
 914         RING_TAIL(GEN11_BSD3_RING_BASE),        /* 0x1D0000 (base) */
 915         RING_TAIL(GEN11_BSD4_RING_BASE),        /* 0x1D4000 (base) */
 916         RING_TAIL(GEN11_VEBOX2_RING_BASE),      /* 0x1D8000 (base) */
 917         /* TODO: Other registers are not yet used */
 918 };
 919
 920 static int mmio_reg_cmp(u32 key, const i915_reg_t *reg)
 921 {
 922         u32 offset = i915_mmio_reg_offset(*reg);
 923
 924         if (key < offset)
 925                 return -1;
 926         else if (key > offset)
 927                 return 1;
 928         else
 929                 return 0;
 930 }
 931
 932 #define __is_genX_shadowed(x) \
 933 static bool is_gen##x##_shadowed(u32 offset) \
 934 { \
 935         const i915_reg_t *regs = gen##x##_shadowed_regs; \
 936         return BSEARCH(offset, regs, ARRAY_SIZE(gen##x##_shadowed_regs), \
 937                        mmio_reg_cmp); \
 938 }
 939
 940 __is_genX_shadowed(8)
 941 __is_genX_shadowed(11)
 942
 943 #define __gen8_reg_write_fw_domains(offset) \
 944 ({ \
 945         enum forcewake_domains __fwd; \
 946         if (NEEDS_FORCE_WAKE(offset) && !is_gen8_shadowed(offset)) \
 947                 __fwd = FORCEWAKE_RENDER; \
 948         else \
 949                 __fwd = 0; \
 950         __fwd; \
 951 })
 952
 953 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
 954 static const struct intel_forcewake_range __chv_fw_ranges[] = {
 955         GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
 956         GEN_FW_RANGE(0x4000, 0x4fff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
 957         GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
 958         GEN_FW_RANGE(0x8000, 0x82ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
 959         GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
 960         GEN_FW_RANGE(0x8500, 0x85ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
 961         GEN_FW_RANGE(0x8800, 0x88ff, FORCEWAKE_MEDIA),
 962         GEN_FW_RANGE(0x9000, 0xafff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
 963         GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
 964         GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
 965         GEN_FW_RANGE(0xe000, 0xe7ff, FORCEWAKE_RENDER),
 966         GEN_FW_RANGE(0xf000, 0xffff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
 967         GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
 968         GEN_FW_RANGE(0x1a000, 0x1bfff, FORCEWAKE_MEDIA),
 969         GEN_FW_RANGE(0x1e800, 0x1e9ff, FORCEWAKE_MEDIA),
 970         GEN_FW_RANGE(0x30000, 0x37fff, FORCEWAKE_MEDIA),
 971 };
 972
 973 #define __fwtable_reg_write_fw_domains(offset) \
 974 ({ \
 975         enum forcewake_domains __fwd = 0; \
 976         if (NEEDS_FORCE_WAKE((offset)) && !is_gen8_shadowed(offset)) \
 977                 __fwd = find_fw_domain(dev_priv, offset); \
 978         __fwd; \
 979 })
 980
 981 #define __gen11_fwtable_reg_write_fw_domains(offset) \
 982 ({ \
 983         enum forcewake_domains __fwd = 0; \
 984         if (GEN11_NEEDS_FORCE_WAKE((offset)) && !is_gen11_shadowed(offset)) \
 985                 __fwd = find_fw_domain(dev_priv, offset); \
 986         __fwd; \
 987 })
 988
 989 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
 990 static const struct intel_forcewake_range __gen9_fw_ranges[] = {
 991         GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER),
 992         GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
 993         GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
 994         GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
 995         GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
 996         GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
 997         GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
 998         GEN_FW_RANGE(0x8000, 0x812f, FORCEWAKE_BLITTER),
 999         GEN_FW_RANGE(0x8130, 0x813f, FORCEWAKE_MEDIA),
1000         GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1001         GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
1002         GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1003         GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_BLITTER),
1004         GEN_FW_RANGE(0x8800, 0x89ff, FORCEWAKE_MEDIA),
1005         GEN_FW_RANGE(0x8a00, 0x8bff, FORCEWAKE_BLITTER),
1006         GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1007         GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_BLITTER),
1008         GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1009         GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER),
1010         GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1011         GEN_FW_RANGE(0xb480, 0xcfff, FORCEWAKE_BLITTER),
1012         GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
1013         GEN_FW_RANGE(0xd800, 0xdfff, FORCEWAKE_BLITTER),
1014         GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
1015         GEN_FW_RANGE(0xe900, 0x11fff, FORCEWAKE_BLITTER),
1016         GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
1017         GEN_FW_RANGE(0x14000, 0x19fff, FORCEWAKE_BLITTER),
1018         GEN_FW_RANGE(0x1a000, 0x1e9ff, FORCEWAKE_MEDIA),
1019         GEN_FW_RANGE(0x1ea00, 0x243ff, FORCEWAKE_BLITTER),
1020         GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
1021         GEN_FW_RANGE(0x24800, 0x2ffff, FORCEWAKE_BLITTER),
1022         GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
1023 };
1024
1025 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1026 static const struct intel_forcewake_range __gen11_fw_ranges[] = {
1027         GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER),
1028         GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
1029         GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1030         GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
1031         GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1032         GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
1033         GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1034         GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_BLITTER),
1035         GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1036         GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
1037         GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1038         GEN_FW_RANGE(0x8500, 0x8bff, FORCEWAKE_BLITTER),
1039         GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1040         GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_BLITTER),
1041         GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_ALL),
1042         GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER),
1043         GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1044         GEN_FW_RANGE(0xb480, 0xdfff, FORCEWAKE_BLITTER),
1045         GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
1046         GEN_FW_RANGE(0xe900, 0x243ff, FORCEWAKE_BLITTER),
1047         GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
1048         GEN_FW_RANGE(0x24800, 0x3ffff, FORCEWAKE_BLITTER),
1049         GEN_FW_RANGE(0x40000, 0x1bffff, 0),
1050         GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0),
1051         GEN_FW_RANGE(0x1c4000, 0x1c7fff, FORCEWAKE_MEDIA_VDBOX1),
1052         GEN_FW_RANGE(0x1c8000, 0x1cbfff, FORCEWAKE_MEDIA_VEBOX0),
1053         GEN_FW_RANGE(0x1cc000, 0x1cffff, FORCEWAKE_BLITTER),
1054         GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2),
1055         GEN_FW_RANGE(0x1d4000, 0x1d7fff, FORCEWAKE_MEDIA_VDBOX3),
1056         GEN_FW_RANGE(0x1d8000, 0x1dbfff, FORCEWAKE_MEDIA_VEBOX1)
1057 };
1058
1059 static void
1060 ilk_dummy_write(struct drm_i915_private *dev_priv)
1061 {
1062         /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
1063          * the chip from rc6 before touching it for real. MI_MODE is masked,
1064          * hence harmless to write 0 into. */
1065         __raw_i915_write32(dev_priv, MI_MODE, 0);
1066 }
1067
1068 static void
1069 __unclaimed_reg_debug(struct drm_i915_private *dev_priv,
1070                       const i915_reg_t reg,
1071                       const bool read,
1072                       const bool before)
1073 {
1074         if (WARN(check_for_unclaimed_mmio(dev_priv) && !before,
1075                  "Unclaimed %s register 0x%x\n",
1076                  read ? "read from" : "write to",
1077                  i915_mmio_reg_offset(reg)))
1078                 /* Only report the first N failures */
1079                 i915_modparams.mmio_debug--;
1080 }
1081
1082 static inline void
1083 unclaimed_reg_debug(struct drm_i915_private *dev_priv,
1084                     const i915_reg_t reg,
1085                     const bool read,
1086                     const bool before)
1087 {
1088         if (likely(!i915_modparams.mmio_debug))
1089                 return;
1090
1091         __unclaimed_reg_debug(dev_priv, reg, read, before);
1092 }
1093
1094 #define GEN2_READ_HEADER(x) \
1095         u##x val = 0; \
1096         assert_rpm_wakelock_held(dev_priv);
1097
1098 #define GEN2_READ_FOOTER \
1099         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1100         return val
1101
1102 #define __gen2_read(x) \
1103 static u##x \
1104 gen2_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
1105         GEN2_READ_HEADER(x); \
1106         val = __raw_i915_read##x(dev_priv, reg); \
1107         GEN2_READ_FOOTER; \
1108 }
1109
1110 #define __gen5_read(x) \
1111 static u##x \
1112 gen5_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
1113         GEN2_READ_HEADER(x); \
1114         ilk_dummy_write(dev_priv); \
1115         val = __raw_i915_read##x(dev_priv, reg); \
1116         GEN2_READ_FOOTER; \
1117 }
1118
1119 __gen5_read(8)
1120 __gen5_read(16)
1121 __gen5_read(32)
1122 __gen5_read(64)
1123 __gen2_read(8)
1124 __gen2_read(16)
1125 __gen2_read(32)
1126 __gen2_read(64)
1127
1128 #undef __gen5_read
1129 #undef __gen2_read
1130
1131 #undef GEN2_READ_FOOTER
1132 #undef GEN2_READ_HEADER
1133
1134 #define GEN6_READ_HEADER(x) \
1135         u32 offset = i915_mmio_reg_offset(reg); \
1136         unsigned long irqflags; \
1137         u##x val = 0; \
1138         assert_rpm_wakelock_held(dev_priv); \
1139         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); \
1140         unclaimed_reg_debug(dev_priv, reg, true, true)
1141
1142 #define GEN6_READ_FOOTER \
1143         unclaimed_reg_debug(dev_priv, reg, true, false); \
1144         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
1145         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1146         return val
1147
1148 static noinline void ___force_wake_auto(struct drm_i915_private *dev_priv,
1149                                         enum forcewake_domains fw_domains)
1150 {
1151         struct intel_uncore_forcewake_domain *domain;
1152         unsigned int tmp;
1153
1154         GEM_BUG_ON(fw_domains & ~dev_priv->uncore.fw_domains);
1155
1156         for_each_fw_domain_masked(domain, fw_domains, dev_priv, tmp)
1157                 fw_domain_arm_timer(domain);
1158
1159         dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains);
1160 }
1161
1162 static inline void __force_wake_auto(struct drm_i915_private *dev_priv,
1163                                      enum forcewake_domains fw_domains)
1164 {
1165         if (WARN_ON(!fw_domains))
1166                 return;
1167
1168         /* Turn on all requested but inactive supported forcewake domains. */
1169         fw_domains &= dev_priv->uncore.fw_domains;
1170         fw_domains &= ~dev_priv->uncore.fw_domains_active;
1171
1172         if (fw_domains)
1173                 ___force_wake_auto(dev_priv, fw_domains);
1174 }
1175
1176 #define __gen_read(func, x) \
1177 static u##x \
1178 func##_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
1179         enum forcewake_domains fw_engine; \
1180         GEN6_READ_HEADER(x); \
1181         fw_engine = __##func##_reg_read_fw_domains(offset); \
1182         if (fw_engine) \
1183                 __force_wake_auto(dev_priv, fw_engine); \
1184         val = __raw_i915_read##x(dev_priv, reg); \
1185         GEN6_READ_FOOTER; \
1186 }
1187 #define __gen6_read(x) __gen_read(gen6, x)
1188 #define __fwtable_read(x) __gen_read(fwtable, x)
1189 #define __gen11_fwtable_read(x) __gen_read(gen11_fwtable, x)
1190
1191 __gen11_fwtable_read(8)
1192 __gen11_fwtable_read(16)
1193 __gen11_fwtable_read(32)
1194 __gen11_fwtable_read(64)
1195 __fwtable_read(8)
1196 __fwtable_read(16)
1197 __fwtable_read(32)
1198 __fwtable_read(64)
1199 __gen6_read(8)
1200 __gen6_read(16)
1201 __gen6_read(32)
1202 __gen6_read(64)
1203
1204 #undef __gen11_fwtable_read
1205 #undef __fwtable_read
1206 #undef __gen6_read
1207 #undef GEN6_READ_FOOTER
1208 #undef GEN6_READ_HEADER
1209
1210 #define GEN2_WRITE_HEADER \
1211         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1212         assert_rpm_wakelock_held(dev_priv); \
1213
1214 #define GEN2_WRITE_FOOTER
1215
1216 #define __gen2_write(x) \
1217 static void \
1218 gen2_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1219         GEN2_WRITE_HEADER; \
1220         __raw_i915_write##x(dev_priv, reg, val); \
1221         GEN2_WRITE_FOOTER; \
1222 }
1223
1224 #define __gen5_write(x) \
1225 static void \
1226 gen5_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1227         GEN2_WRITE_HEADER; \
1228         ilk_dummy_write(dev_priv); \
1229         __raw_i915_write##x(dev_priv, reg, val); \
1230         GEN2_WRITE_FOOTER; \
1231 }
1232
1233 __gen5_write(8)
1234 __gen5_write(16)
1235 __gen5_write(32)
1236 __gen2_write(8)
1237 __gen2_write(16)
1238 __gen2_write(32)
1239
1240 #undef __gen5_write
1241 #undef __gen2_write
1242
1243 #undef GEN2_WRITE_FOOTER
1244 #undef GEN2_WRITE_HEADER
1245
1246 #define GEN6_WRITE_HEADER \
1247         u32 offset = i915_mmio_reg_offset(reg); \
1248         unsigned long irqflags; \
1249         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1250         assert_rpm_wakelock_held(dev_priv); \
1251         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); \
1252         unclaimed_reg_debug(dev_priv, reg, false, true)
1253
1254 #define GEN6_WRITE_FOOTER \
1255         unclaimed_reg_debug(dev_priv, reg, false, false); \
1256         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags)
1257
1258 #define __gen6_write(x) \
1259 static void \
1260 gen6_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1261         GEN6_WRITE_HEADER; \
1262         if (NEEDS_FORCE_WAKE(offset)) \
1263                 __gen6_gt_wait_for_fifo(dev_priv); \
1264         __raw_i915_write##x(dev_priv, reg, val); \
1265         GEN6_WRITE_FOOTER; \
1266 }
1267
1268 #define __gen_write(func, x) \
1269 static void \
1270 func##_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
1271         enum forcewake_domains fw_engine; \
1272         GEN6_WRITE_HEADER; \
1273         fw_engine = __##func##_reg_write_fw_domains(offset); \
1274         if (fw_engine) \
1275                 __force_wake_auto(dev_priv, fw_engine); \
1276         __raw_i915_write##x(dev_priv, reg, val); \
1277         GEN6_WRITE_FOOTER; \
1278 }
1279 #define __gen8_write(x) __gen_write(gen8, x)
1280 #define __fwtable_write(x) __gen_write(fwtable, x)
1281 #define __gen11_fwtable_write(x) __gen_write(gen11_fwtable, x)
1282
1283 __gen11_fwtable_write(8)
1284 __gen11_fwtable_write(16)
1285 __gen11_fwtable_write(32)
1286 __fwtable_write(8)
1287 __fwtable_write(16)
1288 __fwtable_write(32)
1289 __gen8_write(8)
1290 __gen8_write(16)
1291 __gen8_write(32)
1292 __gen6_write(8)
1293 __gen6_write(16)
1294 __gen6_write(32)
1295
1296 #undef __gen11_fwtable_write
1297 #undef __fwtable_write
1298 #undef __gen8_write
1299 #undef __gen6_write
1300 #undef GEN6_WRITE_FOOTER
1301 #undef GEN6_WRITE_HEADER
1302
1303 #define ASSIGN_WRITE_MMIO_VFUNCS(i915, x) \
1304 do { \
1305         (i915)->uncore.funcs.mmio_writeb = x##_write8; \
1306         (i915)->uncore.funcs.mmio_writew = x##_write16; \
1307         (i915)->uncore.funcs.mmio_writel = x##_write32; \
1308 } while (0)
1309
1310 #define ASSIGN_READ_MMIO_VFUNCS(i915, x) \
1311 do { \
1312         (i915)->uncore.funcs.mmio_readb = x##_read8; \
1313         (i915)->uncore.funcs.mmio_readw = x##_read16; \
1314         (i915)->uncore.funcs.mmio_readl = x##_read32; \
1315         (i915)->uncore.funcs.mmio_readq = x##_read64; \
1316 } while (0)
1317
1318
1319 static void fw_domain_init(struct drm_i915_private *dev_priv,
1320                            enum forcewake_domain_id domain_id,
1321                            i915_reg_t reg_set,
1322                            i915_reg_t reg_ack)
1323 {
1324         struct intel_uncore_forcewake_domain *d;
1325
1326         if (WARN_ON(domain_id >= FW_DOMAIN_ID_COUNT))
1327                 return;
1328
1329         d = &dev_priv->uncore.fw_domain[domain_id];
1330
1331         WARN_ON(d->wake_count);
1332
1333         WARN_ON(!i915_mmio_reg_valid(reg_set));
1334         WARN_ON(!i915_mmio_reg_valid(reg_ack));
1335
1336         d->wake_count = 0;
1337         d->reg_set = reg_set;
1338         d->reg_ack = reg_ack;
1339
1340         d->id = domain_id;
1341
1342         BUILD_BUG_ON(FORCEWAKE_RENDER != (1 << FW_DOMAIN_ID_RENDER));
1343         BUILD_BUG_ON(FORCEWAKE_BLITTER != (1 << FW_DOMAIN_ID_BLITTER));
1344         BUILD_BUG_ON(FORCEWAKE_MEDIA != (1 << FW_DOMAIN_ID_MEDIA));
1345         BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX0));
1346         BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX1));
1347         BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX2 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX2));
1348         BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX3 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX3));
1349         BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX0));
1350         BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX1));
1351
1352
1353         d->mask = BIT(domain_id);
1354
1355         hrtimer_init(&d->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
1356         d->timer.function = intel_uncore_fw_release_timer;
1357
1358         dev_priv->uncore.fw_domains |= BIT(domain_id);
1359
1360         fw_domain_reset(dev_priv, d);
1361 }
1362
1363 static void fw_domain_fini(struct drm_i915_private *dev_priv,
1364                            enum forcewake_domain_id domain_id)
1365 {
1366         struct intel_uncore_forcewake_domain *d;
1367
1368         if (WARN_ON(domain_id >= FW_DOMAIN_ID_COUNT))
1369                 return;
1370
1371         d = &dev_priv->uncore.fw_domain[domain_id];
1372
1373         WARN_ON(d->wake_count);
1374         WARN_ON(hrtimer_cancel(&d->timer));
1375         memset(d, 0, sizeof(*d));
1376
1377         dev_priv->uncore.fw_domains &= ~BIT(domain_id);
1378 }
1379
1380 static void intel_uncore_fw_domains_init(struct drm_i915_private *dev_priv)
1381 {
1382         if (INTEL_GEN(dev_priv) <= 5 || intel_vgpu_active(dev_priv))
1383                 return;
1384
1385         if (IS_GEN6(dev_priv)) {
1386                 dev_priv->uncore.fw_reset = 0;
1387                 dev_priv->uncore.fw_set = FORCEWAKE_KERNEL;
1388                 dev_priv->uncore.fw_clear = 0;
1389         } else {
1390                 /* WaRsClearFWBitsAtReset:bdw,skl */
1391                 dev_priv->uncore.fw_reset = _MASKED_BIT_DISABLE(0xffff);
1392                 dev_priv->uncore.fw_set = _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL);
1393                 dev_priv->uncore.fw_clear = _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL);
1394         }
1395
1396         if (INTEL_GEN(dev_priv) >= 11) {
1397                 int i;
1398
1399                 dev_priv->uncore.funcs.force_wake_get =
1400                         fw_domains_get_with_fallback;
1401                 dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1402                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1403                                FORCEWAKE_RENDER_GEN9,
1404                                FORCEWAKE_ACK_RENDER_GEN9);
1405                 fw_domain_init(dev_priv, FW_DOMAIN_ID_BLITTER,
1406                                FORCEWAKE_BLITTER_GEN9,
1407                                FORCEWAKE_ACK_BLITTER_GEN9);
1408                 for (i = 0; i < I915_MAX_VCS; i++) {
1409                         if (!HAS_ENGINE(dev_priv, _VCS(i)))
1410                                 continue;
1411
1412                         fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA_VDBOX0 + i,
1413                                        FORCEWAKE_MEDIA_VDBOX_GEN11(i),
1414                                        FORCEWAKE_ACK_MEDIA_VDBOX_GEN11(i));
1415                 }
1416                 for (i = 0; i < I915_MAX_VECS; i++) {
1417                         if (!HAS_ENGINE(dev_priv, _VECS(i)))
1418                                 continue;
1419
1420                         fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA_VEBOX0 + i,
1421                                        FORCEWAKE_MEDIA_VEBOX_GEN11(i),
1422                                        FORCEWAKE_ACK_MEDIA_VEBOX_GEN11(i));
1423                 }
1424         } else if (IS_GEN9(dev_priv) || IS_GEN10(dev_priv)) {
1425                 dev_priv->uncore.funcs.force_wake_get =
1426                         fw_domains_get_with_fallback;
1427                 dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1428                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1429                                FORCEWAKE_RENDER_GEN9,
1430                                FORCEWAKE_ACK_RENDER_GEN9);
1431                 fw_domain_init(dev_priv, FW_DOMAIN_ID_BLITTER,
1432                                FORCEWAKE_BLITTER_GEN9,
1433                                FORCEWAKE_ACK_BLITTER_GEN9);
1434                 fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA,
1435                                FORCEWAKE_MEDIA_GEN9, FORCEWAKE_ACK_MEDIA_GEN9);
1436         } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
1437                 dev_priv->uncore.funcs.force_wake_get = fw_domains_get;
1438                 dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1439                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1440                                FORCEWAKE_VLV, FORCEWAKE_ACK_VLV);
1441                 fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA,
1442                                FORCEWAKE_MEDIA_VLV, FORCEWAKE_ACK_MEDIA_VLV);
1443         } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
1444                 dev_priv->uncore.funcs.force_wake_get =
1445                         fw_domains_get_with_thread_status;
1446                 dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1447                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1448                                FORCEWAKE_MT, FORCEWAKE_ACK_HSW);
1449         } else if (IS_IVYBRIDGE(dev_priv)) {
1450                 u32 ecobus;
1451
1452                 /* IVB configs may use multi-threaded forcewake */
1453
1454                 /* A small trick here - if the bios hasn't configured
1455                  * MT forcewake, and if the device is in RC6, then
1456                  * force_wake_mt_get will not wake the device and the
1457                  * ECOBUS read will return zero. Which will be
1458                  * (correctly) interpreted by the test below as MT
1459                  * forcewake being disabled.
1460                  */
1461                 dev_priv->uncore.funcs.force_wake_get =
1462                         fw_domains_get_with_thread_status;
1463                 dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1464
1465                 /* We need to init first for ECOBUS access and then
1466                  * determine later if we want to reinit, in case of MT access is
1467                  * not working. In this stage we don't know which flavour this
1468                  * ivb is, so it is better to reset also the gen6 fw registers
1469                  * before the ecobus check.
1470                  */
1471
1472                 __raw_i915_write32(dev_priv, FORCEWAKE, 0);
1473                 __raw_posting_read(dev_priv, ECOBUS);
1474
1475                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1476                                FORCEWAKE_MT, FORCEWAKE_MT_ACK);
1477
1478                 spin_lock_irq(&dev_priv->uncore.lock);
1479                 fw_domains_get_with_thread_status(dev_priv, FORCEWAKE_RENDER);
1480                 ecobus = __raw_i915_read32(dev_priv, ECOBUS);
1481                 fw_domains_put(dev_priv, FORCEWAKE_RENDER);
1482                 spin_unlock_irq(&dev_priv->uncore.lock);
1483
1484                 if (!(ecobus & FORCEWAKE_MT_ENABLE)) {
1485                         DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
1486                         DRM_INFO("when using vblank-synced partial screen updates.\n");
1487                         fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1488                                        FORCEWAKE, FORCEWAKE_ACK);
1489                 }
1490         } else if (IS_GEN6(dev_priv)) {
1491                 dev_priv->uncore.funcs.force_wake_get =
1492                         fw_domains_get_with_thread_status;
1493                 dev_priv->uncore.funcs.force_wake_put = fw_domains_put;
1494                 fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
1495                                FORCEWAKE, FORCEWAKE_ACK);
1496         }
1497
1498         /* All future platforms are expected to require complex power gating */
1499         WARN_ON(dev_priv->uncore.fw_domains == 0);
1500 }
1501
1502 #define ASSIGN_FW_DOMAINS_TABLE(d) \
1503 { \
1504         dev_priv->uncore.fw_domains_table = \
1505                         (struct intel_forcewake_range *)(d); \
1506         dev_priv->uncore.fw_domains_table_entries = ARRAY_SIZE((d)); \
1507 }
1508
1509 static int i915_pmic_bus_access_notifier(struct notifier_block *nb,
1510                                          unsigned long action, void *data)
1511 {
1512         struct drm_i915_private *dev_priv = container_of(nb,
1513                         struct drm_i915_private, uncore.pmic_bus_access_nb);
1514
1515         switch (action) {
1516         case MBI_PMIC_BUS_ACCESS_BEGIN:
1517                 /*
1518                  * forcewake all now to make sure that we don't need to do a
1519                  * forcewake later which on systems where this notifier gets
1520                  * called requires the punit to access to the shared pmic i2c
1521                  * bus, which will be busy after this notification, leading to:
1522                  * "render: timed out waiting for forcewake ack request."
1523                  * errors.
1524                  *
1525                  * The notifier is unregistered during intel_runtime_suspend(),
1526                  * so it's ok to access the HW here without holding a RPM
1527                  * wake reference -> disable wakeref asserts for the time of
1528                  * the access.
1529                  */
1530                 disable_rpm_wakeref_asserts(dev_priv);
1531                 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
1532                 enable_rpm_wakeref_asserts(dev_priv);
1533                 break;
1534         case MBI_PMIC_BUS_ACCESS_END:
1535                 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
1536                 break;
1537         }
1538
1539         return NOTIFY_OK;
1540 }
1541
1542 void intel_uncore_init(struct drm_i915_private *dev_priv)
1543 {
1544         i915_check_vgpu(dev_priv);
1545
1546         intel_uncore_edram_detect(dev_priv);
1547         intel_uncore_fw_domains_init(dev_priv);
1548         __intel_uncore_early_sanitize(dev_priv, false);
1549
1550         dev_priv->uncore.unclaimed_mmio_check = 1;
1551         dev_priv->uncore.pmic_bus_access_nb.notifier_call =
1552                 i915_pmic_bus_access_notifier;
1553
1554         if (IS_GEN(dev_priv, 2, 4) || intel_vgpu_active(dev_priv)) {
1555                 ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, gen2);
1556                 ASSIGN_READ_MMIO_VFUNCS(dev_priv, gen2);
1557         } else if (IS_GEN5(dev_priv)) {
1558                 ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, gen5);
1559                 ASSIGN_READ_MMIO_VFUNCS(dev_priv, gen5);
1560         } else if (IS_GEN(dev_priv, 6, 7)) {
1561                 ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, gen6);
1562
1563                 if (IS_VALLEYVIEW(dev_priv)) {
1564                         ASSIGN_FW_DOMAINS_TABLE(__vlv_fw_ranges);
1565                         ASSIGN_READ_MMIO_VFUNCS(dev_priv, fwtable);
1566                 } else {
1567                         ASSIGN_READ_MMIO_VFUNCS(dev_priv, gen6);
1568                 }
1569         } else if (IS_GEN8(dev_priv)) {
1570                 if (IS_CHERRYVIEW(dev_priv)) {
1571                         ASSIGN_FW_DOMAINS_TABLE(__chv_fw_ranges);
1572                         ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, fwtable);
1573                         ASSIGN_READ_MMIO_VFUNCS(dev_priv, fwtable);
1574
1575                 } else {
1576                         ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, gen8);
1577                         ASSIGN_READ_MMIO_VFUNCS(dev_priv, gen6);
1578                 }
1579         } else if (IS_GEN(dev_priv, 9, 10)) {
1580                 ASSIGN_FW_DOMAINS_TABLE(__gen9_fw_ranges);
1581                 ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, fwtable);
1582                 ASSIGN_READ_MMIO_VFUNCS(dev_priv, fwtable);
1583         } else {
1584                 ASSIGN_FW_DOMAINS_TABLE(__gen11_fw_ranges);
1585                 ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, gen11_fwtable);
1586                 ASSIGN_READ_MMIO_VFUNCS(dev_priv, gen11_fwtable);
1587         }
1588
1589         iosf_mbi_register_pmic_bus_access_notifier(
1590                 &dev_priv->uncore.pmic_bus_access_nb);
1591 }
1592
1593 /*
1594  * We might have detected that some engines are fused off after we initialized
1595  * the forcewake domains. Prune them, to make sure they only reference existing
1596  * engines.
1597  */
1598 void intel_uncore_prune(struct drm_i915_private *dev_priv)
1599 {
1600         if (INTEL_GEN(dev_priv) >= 11) {
1601                 enum forcewake_domains fw_domains = dev_priv->uncore.fw_domains;
1602                 enum forcewake_domain_id domain_id;
1603                 int i;
1604
1605                 for (i = 0; i < I915_MAX_VCS; i++) {
1606                         domain_id = FW_DOMAIN_ID_MEDIA_VDBOX0 + i;
1607
1608                         if (HAS_ENGINE(dev_priv, _VCS(i)))
1609                                 continue;
1610
1611                         if (fw_domains & BIT(domain_id))
1612                                 fw_domain_fini(dev_priv, domain_id);
1613                 }
1614
1615                 for (i = 0; i < I915_MAX_VECS; i++) {
1616                         domain_id = FW_DOMAIN_ID_MEDIA_VEBOX0 + i;
1617
1618                         if (HAS_ENGINE(dev_priv, _VECS(i)))
1619                                 continue;
1620
1621                         if (fw_domains & BIT(domain_id))
1622                                 fw_domain_fini(dev_priv, domain_id);
1623                 }
1624         }
1625 }
1626
1627 void intel_uncore_fini(struct drm_i915_private *dev_priv)
1628 {
1629         /* Paranoia: make sure we have disabled everything before we exit. */
1630         intel_uncore_sanitize(dev_priv);
1631
1632         iosf_mbi_punit_acquire();
1633         iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
1634                 &dev_priv->uncore.pmic_bus_access_nb);
1635         intel_uncore_forcewake_reset(dev_priv, false);
1636         iosf_mbi_punit_release();
1637 }
1638
1639 static const struct reg_whitelist {
1640         i915_reg_t offset_ldw;
1641         i915_reg_t offset_udw;
1642         u16 gen_mask;
1643         u8 size;
1644 } reg_read_whitelist[] = { {
1645         .offset_ldw = RING_TIMESTAMP(RENDER_RING_BASE),
1646         .offset_udw = RING_TIMESTAMP_UDW(RENDER_RING_BASE),
1647         .gen_mask = INTEL_GEN_MASK(4, 11),
1648         .size = 8
1649 } };
1650
1651 int i915_reg_read_ioctl(struct drm_device *dev,
1652                         void *data, struct drm_file *file)
1653 {
1654         struct drm_i915_private *dev_priv = to_i915(dev);
1655         struct drm_i915_reg_read *reg = data;
1656         struct reg_whitelist const *entry;
1657         unsigned int flags;
1658         int remain;
1659         int ret = 0;
1660
1661         entry = reg_read_whitelist;
1662         remain = ARRAY_SIZE(reg_read_whitelist);
1663         while (remain) {
1664                 u32 entry_offset = i915_mmio_reg_offset(entry->offset_ldw);
1665
1666                 GEM_BUG_ON(!is_power_of_2(entry->size));
1667                 GEM_BUG_ON(entry->size > 8);
1668                 GEM_BUG_ON(entry_offset & (entry->size - 1));
1669
1670                 if (INTEL_INFO(dev_priv)->gen_mask & entry->gen_mask &&
1671                     entry_offset == (reg->offset & -entry->size))
1672                         break;
1673                 entry++;
1674                 remain--;
1675         }
1676
1677         if (!remain)
1678                 return -EINVAL;
1679
1680         flags = reg->offset & (entry->size - 1);
1681
1682         intel_runtime_pm_get(dev_priv);
1683         if (entry->size == 8 && flags == I915_REG_READ_8B_WA)
1684                 reg->val = I915_READ64_2x32(entry->offset_ldw,
1685                                             entry->offset_udw);
1686         else if (entry->size == 8 && flags == 0)
1687                 reg->val = I915_READ64(entry->offset_ldw);
1688         else if (entry->size == 4 && flags == 0)
1689                 reg->val = I915_READ(entry->offset_ldw);
1690         else if (entry->size == 2 && flags == 0)
1691                 reg->val = I915_READ16(entry->offset_ldw);
1692         else if (entry->size == 1 && flags == 0)
1693                 reg->val = I915_READ8(entry->offset_ldw);
1694         else
1695                 ret = -EINVAL;
1696         intel_runtime_pm_put(dev_priv);
1697
1698         return ret;
1699 }
1700
1701 static void gen3_stop_engine(struct intel_engine_cs *engine)
1702 {
1703         struct drm_i915_private *dev_priv = engine->i915;
1704         const u32 base = engine->mmio_base;
1705         const i915_reg_t mode = RING_MI_MODE(base);
1706
1707         I915_WRITE_FW(mode, _MASKED_BIT_ENABLE(STOP_RING));
1708         if (__intel_wait_for_register_fw(dev_priv,
1709                                          mode, MODE_IDLE, MODE_IDLE,
1710                                          500, 0,
1711                                          NULL))
1712                 DRM_DEBUG_DRIVER("%s: timed out on STOP_RING\n",
1713                                  engine->name);
1714
1715         I915_WRITE_FW(RING_HEAD(base), I915_READ_FW(RING_TAIL(base)));
1716         POSTING_READ_FW(RING_HEAD(base)); /* paranoia */
1717
1718         I915_WRITE_FW(RING_HEAD(base), 0);
1719         I915_WRITE_FW(RING_TAIL(base), 0);
1720         POSTING_READ_FW(RING_TAIL(base));
1721
1722         /* The ring must be empty before it is disabled */
1723         I915_WRITE_FW(RING_CTL(base), 0);
1724
1725         /* Check acts as a post */
1726         if (I915_READ_FW(RING_HEAD(base)) != 0)
1727                 DRM_DEBUG_DRIVER("%s: ring head not parked\n",
1728                                  engine->name);
1729 }
1730
1731 static void i915_stop_engines(struct drm_i915_private *dev_priv,
1732                               unsigned engine_mask)
1733 {
1734         struct intel_engine_cs *engine;
1735         enum intel_engine_id id;
1736
1737         if (INTEL_GEN(dev_priv) < 3)
1738                 return;
1739
1740         for_each_engine_masked(engine, dev_priv, engine_mask, id)
1741                 gen3_stop_engine(engine);
1742 }
1743
1744 static bool i915_in_reset(struct pci_dev *pdev)
1745 {
1746         u8 gdrst;
1747
1748         pci_read_config_byte(pdev, I915_GDRST, &gdrst);
1749         return gdrst & GRDOM_RESET_STATUS;
1750 }
1751
1752 static int i915_do_reset(struct drm_i915_private *dev_priv, unsigned engine_mask)
1753 {
1754         struct pci_dev *pdev = dev_priv->drm.pdev;
1755         int err;
1756
1757         /* Assert reset for at least 20 usec, and wait for acknowledgement. */
1758         pci_write_config_byte(pdev, I915_GDRST, GRDOM_RESET_ENABLE);
1759         usleep_range(50, 200);
1760         err = wait_for(i915_in_reset(pdev), 500);
1761
1762         /* Clear the reset request. */
1763         pci_write_config_byte(pdev, I915_GDRST, 0);
1764         usleep_range(50, 200);
1765         if (!err)
1766                 err = wait_for(!i915_in_reset(pdev), 500);
1767
1768         return err;
1769 }
1770
1771 static bool g4x_reset_complete(struct pci_dev *pdev)
1772 {
1773         u8 gdrst;
1774
1775         pci_read_config_byte(pdev, I915_GDRST, &gdrst);
1776         return (gdrst & GRDOM_RESET_ENABLE) == 0;
1777 }
1778
1779 static int g33_do_reset(struct drm_i915_private *dev_priv, unsigned engine_mask)
1780 {
1781         struct pci_dev *pdev = dev_priv->drm.pdev;
1782
1783         pci_write_config_byte(pdev, I915_GDRST, GRDOM_RESET_ENABLE);
1784         return wait_for(g4x_reset_complete(pdev), 500);
1785 }
1786
1787 static int g4x_do_reset(struct drm_i915_private *dev_priv, unsigned engine_mask)
1788 {
1789         struct pci_dev *pdev = dev_priv->drm.pdev;
1790         int ret;
1791
1792         /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1793         I915_WRITE(VDECCLK_GATE_D,
1794                    I915_READ(VDECCLK_GATE_D) | VCP_UNIT_CLOCK_GATE_DISABLE);
1795         POSTING_READ(VDECCLK_GATE_D);
1796
1797         pci_write_config_byte(pdev, I915_GDRST,
1798                               GRDOM_MEDIA | GRDOM_RESET_ENABLE);
1799         ret =  wait_for(g4x_reset_complete(pdev), 500);
1800         if (ret) {
1801                 DRM_DEBUG_DRIVER("Wait for media reset failed\n");
1802                 goto out;
1803         }
1804
1805         pci_write_config_byte(pdev, I915_GDRST,
1806                               GRDOM_RENDER | GRDOM_RESET_ENABLE);
1807         ret =  wait_for(g4x_reset_complete(pdev), 500);
1808         if (ret) {
1809                 DRM_DEBUG_DRIVER("Wait for render reset failed\n");
1810                 goto out;
1811         }
1812
1813 out:
1814         pci_write_config_byte(pdev, I915_GDRST, 0);
1815
1816         I915_WRITE(VDECCLK_GATE_D,
1817                    I915_READ(VDECCLK_GATE_D) & ~VCP_UNIT_CLOCK_GATE_DISABLE);
1818         POSTING_READ(VDECCLK_GATE_D);
1819
1820         return ret;
1821 }
1822
1823 static int ironlake_do_reset(struct drm_i915_private *dev_priv,
1824                              unsigned engine_mask)
1825 {
1826         int ret;
1827
1828         I915_WRITE(ILK_GDSR, ILK_GRDOM_RENDER | ILK_GRDOM_RESET_ENABLE);
1829         ret = intel_wait_for_register(dev_priv,
1830                                       ILK_GDSR, ILK_GRDOM_RESET_ENABLE, 0,
1831                                       500);
1832         if (ret) {
1833                 DRM_DEBUG_DRIVER("Wait for render reset failed\n");
1834                 goto out;
1835         }
1836
1837         I915_WRITE(ILK_GDSR, ILK_GRDOM_MEDIA | ILK_GRDOM_RESET_ENABLE);
1838         ret = intel_wait_for_register(dev_priv,
1839                                       ILK_GDSR, ILK_GRDOM_RESET_ENABLE, 0,
1840                                       500);
1841         if (ret) {
1842                 DRM_DEBUG_DRIVER("Wait for media reset failed\n");
1843                 goto out;
1844         }
1845
1846 out:
1847         I915_WRITE(ILK_GDSR, 0);
1848         POSTING_READ(ILK_GDSR);
1849         return ret;
1850 }
1851
1852 /* Reset the hardware domains (GENX_GRDOM_*) specified by mask */
1853 static int gen6_hw_domain_reset(struct drm_i915_private *dev_priv,
1854                                 u32 hw_domain_mask)
1855 {
1856         int err;
1857
1858         /* GEN6_GDRST is not in the gt power well, no need to check
1859          * for fifo space for the write or forcewake the chip for
1860          * the read
1861          */
1862         __raw_i915_write32(dev_priv, GEN6_GDRST, hw_domain_mask);
1863
1864         /* Wait for the device to ack the reset requests */
1865         err = __intel_wait_for_register_fw(dev_priv,
1866                                            GEN6_GDRST, hw_domain_mask, 0,
1867                                            500, 0,
1868                                            NULL);
1869         if (err)
1870                 DRM_DEBUG_DRIVER("Wait for 0x%08x engines reset failed\n",
1871                                  hw_domain_mask);
1872
1873         return err;
1874 }
1875
1876 /**
1877  * gen6_reset_engines - reset individual engines
1878  * @dev_priv: i915 device
1879  * @engine_mask: mask of intel_ring_flag() engines or ALL_ENGINES for full reset
1880  *
1881  * This function will reset the individual engines that are set in engine_mask.
1882  * If you provide ALL_ENGINES as mask, full global domain reset will be issued.
1883  *
1884  * Note: It is responsibility of the caller to handle the difference between
1885  * asking full domain reset versus reset for all available individual engines.
1886  *
1887  * Returns 0 on success, nonzero on error.
1888  */
1889 static int gen6_reset_engines(struct drm_i915_private *dev_priv,
1890                               unsigned engine_mask)
1891 {
1892         struct intel_engine_cs *engine;
1893         const u32 hw_engine_mask[I915_NUM_ENGINES] = {
1894                 [RCS] = GEN6_GRDOM_RENDER,
1895                 [BCS] = GEN6_GRDOM_BLT,
1896                 [VCS] = GEN6_GRDOM_MEDIA,
1897                 [VCS2] = GEN8_GRDOM_MEDIA2,
1898                 [VECS] = GEN6_GRDOM_VECS,
1899         };
1900         u32 hw_mask;
1901
1902         if (engine_mask == ALL_ENGINES) {
1903                 hw_mask = GEN6_GRDOM_FULL;
1904         } else {
1905                 unsigned int tmp;
1906
1907                 hw_mask = 0;
1908                 for_each_engine_masked(engine, dev_priv, engine_mask, tmp)
1909                         hw_mask |= hw_engine_mask[engine->id];
1910         }
1911
1912         return gen6_hw_domain_reset(dev_priv, hw_mask);
1913 }
1914
1915 /**
1916  * gen11_reset_engines - reset individual engines
1917  * @dev_priv: i915 device
1918  * @engine_mask: mask of intel_ring_flag() engines or ALL_ENGINES for full reset
1919  *
1920  * This function will reset the individual engines that are set in engine_mask.
1921  * If you provide ALL_ENGINES as mask, full global domain reset will be issued.
1922  *
1923  * Note: It is responsibility of the caller to handle the difference between
1924  * asking full domain reset versus reset for all available individual engines.
1925  *
1926  * Returns 0 on success, nonzero on error.
1927  */
1928 static int gen11_reset_engines(struct drm_i915_private *dev_priv,
1929                                unsigned engine_mask)
1930 {
1931         struct intel_engine_cs *engine;
1932         const u32 hw_engine_mask[I915_NUM_ENGINES] = {
1933                 [RCS] = GEN11_GRDOM_RENDER,
1934                 [BCS] = GEN11_GRDOM_BLT,
1935                 [VCS] = GEN11_GRDOM_MEDIA,
1936                 [VCS2] = GEN11_GRDOM_MEDIA2,
1937                 [VCS3] = GEN11_GRDOM_MEDIA3,
1938                 [VCS4] = GEN11_GRDOM_MEDIA4,
1939                 [VECS] = GEN11_GRDOM_VECS,
1940                 [VECS2] = GEN11_GRDOM_VECS2,
1941         };
1942         u32 hw_mask;
1943
1944         BUILD_BUG_ON(VECS2 + 1 != I915_NUM_ENGINES);
1945
1946         if (engine_mask == ALL_ENGINES) {
1947                 hw_mask = GEN11_GRDOM_FULL;
1948         } else {
1949                 unsigned int tmp;
1950
1951                 hw_mask = 0;
1952                 for_each_engine_masked(engine, dev_priv, engine_mask, tmp)
1953                         hw_mask |= hw_engine_mask[engine->id];
1954         }
1955
1956         return gen6_hw_domain_reset(dev_priv, hw_mask);
1957 }
1958
1959 /**
1960  * __intel_wait_for_register_fw - wait until register matches expected state
1961  * @dev_priv: the i915 device
1962  * @reg: the register to read
1963  * @mask: mask to apply to register value
1964  * @value: expected value
1965  * @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
1966  * @slow_timeout_ms: slow timeout in millisecond
1967  * @out_value: optional placeholder to hold registry value
1968  *
1969  * This routine waits until the target register @reg contains the expected
1970  * @value after applying the @mask, i.e. it waits until ::
1971  *
1972  *     (I915_READ_FW(reg) & mask) == value
1973  *
1974  * Otherwise, the wait will timeout after @slow_timeout_ms milliseconds.
1975  * For atomic context @slow_timeout_ms must be zero and @fast_timeout_us
1976  * must be not larger than 20,0000 microseconds.
1977  *
1978  * Note that this routine assumes the caller holds forcewake asserted, it is
1979  * not suitable for very long waits. See intel_wait_for_register() if you
1980  * wish to wait without holding forcewake for the duration (i.e. you expect
1981  * the wait to be slow).
1982  *
1983  * Returns 0 if the register matches the desired condition, or -ETIMEOUT.
1984  */
1985 int __intel_wait_for_register_fw(struct drm_i915_private *dev_priv,
1986                                  i915_reg_t reg,
1987                                  u32 mask,
1988                                  u32 value,
1989                                  unsigned int fast_timeout_us,
1990                                  unsigned int slow_timeout_ms,
1991                                  u32 *out_value)
1992 {
1993         u32 uninitialized_var(reg_value);
1994 #define done (((reg_value = I915_READ_FW(reg)) & mask) == value)
1995         int ret;
1996
1997         /* Catch any overuse of this function */
1998         might_sleep_if(slow_timeout_ms);
1999         GEM_BUG_ON(fast_timeout_us > 20000);
2000
2001         ret = -ETIMEDOUT;
2002         if (fast_timeout_us && fast_timeout_us <= 20000)
2003                 ret = _wait_for_atomic(done, fast_timeout_us, 0);
2004         if (ret && slow_timeout_ms)
2005                 ret = wait_for(done, slow_timeout_ms);
2006
2007         if (out_value)
2008                 *out_value = reg_value;
2009
2010         return ret;
2011 #undef done
2012 }
2013
2014 /**
2015  * __intel_wait_for_register - wait until register matches expected state
2016  * @dev_priv: the i915 device
2017  * @reg: the register to read
2018  * @mask: mask to apply to register value
2019  * @value: expected value
2020  * @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
2021  * @slow_timeout_ms: slow timeout in millisecond
2022  * @out_value: optional placeholder to hold registry value
2023  *
2024  * This routine waits until the target register @reg contains the expected
2025  * @value after applying the @mask, i.e. it waits until ::
2026  *
2027  *     (I915_READ(reg) & mask) == value
2028  *
2029  * Otherwise, the wait will timeout after @timeout_ms milliseconds.
2030  *
2031  * Returns 0 if the register matches the desired condition, or -ETIMEOUT.
2032  */
2033 int __intel_wait_for_register(struct drm_i915_private *dev_priv,
2034                             i915_reg_t reg,
2035                             u32 mask,
2036                             u32 value,
2037                             unsigned int fast_timeout_us,
2038                             unsigned int slow_timeout_ms,
2039                             u32 *out_value)
2040 {
2041         unsigned fw =
2042                 intel_uncore_forcewake_for_reg(dev_priv, reg, FW_REG_READ);
2043         u32 reg_value;
2044         int ret;
2045
2046         might_sleep_if(slow_timeout_ms);
2047
2048         spin_lock_irq(&dev_priv->uncore.lock);
2049         intel_uncore_forcewake_get__locked(dev_priv, fw);
2050
2051         ret = __intel_wait_for_register_fw(dev_priv,
2052                                            reg, mask, value,
2053                                            fast_timeout_us, 0, &reg_value);
2054
2055         intel_uncore_forcewake_put__locked(dev_priv, fw);
2056         spin_unlock_irq(&dev_priv->uncore.lock);
2057
2058         if (ret && slow_timeout_ms)
2059                 ret = __wait_for(reg_value = I915_READ_NOTRACE(reg),
2060                                  (reg_value & mask) == value,
2061                                  slow_timeout_ms * 1000, 10, 1000);
2062
2063         if (out_value)
2064                 *out_value = reg_value;
2065
2066         return ret;
2067 }
2068
2069 static int gen8_reset_engine_start(struct intel_engine_cs *engine)
2070 {
2071         struct drm_i915_private *dev_priv = engine->i915;
2072         int ret;
2073
2074         I915_WRITE_FW(RING_RESET_CTL(engine->mmio_base),
2075                       _MASKED_BIT_ENABLE(RESET_CTL_REQUEST_RESET));
2076
2077         ret = __intel_wait_for_register_fw(dev_priv,
2078                                            RING_RESET_CTL(engine->mmio_base),
2079                                            RESET_CTL_READY_TO_RESET,
2080                                            RESET_CTL_READY_TO_RESET,
2081                                            700, 0,
2082                                            NULL);
2083         if (ret)
2084                 DRM_ERROR("%s: reset request timeout\n", engine->name);
2085
2086         return ret;
2087 }
2088
2089 static void gen8_reset_engine_cancel(struct intel_engine_cs *engine)
2090 {
2091         struct drm_i915_private *dev_priv = engine->i915;
2092
2093         I915_WRITE_FW(RING_RESET_CTL(engine->mmio_base),
2094                       _MASKED_BIT_DISABLE(RESET_CTL_REQUEST_RESET));
2095 }
2096
2097 static int gen8_reset_engines(struct drm_i915_private *dev_priv,
2098                               unsigned engine_mask)
2099 {
2100         struct intel_engine_cs *engine;
2101         unsigned int tmp;
2102
2103         for_each_engine_masked(engine, dev_priv, engine_mask, tmp)
2104                 if (gen8_reset_engine_start(engine))
2105                         goto not_ready;
2106
2107         if (INTEL_GEN(dev_priv) >= 11)
2108                 return gen11_reset_engines(dev_priv, engine_mask);
2109         else
2110                 return gen6_reset_engines(dev_priv, engine_mask);
2111
2112 not_ready:
2113         for_each_engine_masked(engine, dev_priv, engine_mask, tmp)
2114                 gen8_reset_engine_cancel(engine);
2115
2116         return -EIO;
2117 }
2118
2119 typedef int (*reset_func)(struct drm_i915_private *, unsigned engine_mask);
2120
2121 static reset_func intel_get_gpu_reset(struct drm_i915_private *dev_priv)
2122 {
2123         if (!i915_modparams.reset)
2124                 return NULL;
2125
2126         if (INTEL_GEN(dev_priv) >= 8)
2127                 return gen8_reset_engines;
2128         else if (INTEL_GEN(dev_priv) >= 6)
2129                 return gen6_reset_engines;
2130         else if (IS_GEN5(dev_priv))
2131                 return ironlake_do_reset;
2132         else if (IS_G4X(dev_priv))
2133                 return g4x_do_reset;
2134         else if (IS_G33(dev_priv) || IS_PINEVIEW(dev_priv))
2135                 return g33_do_reset;
2136         else if (INTEL_GEN(dev_priv) >= 3)
2137                 return i915_do_reset;
2138         else
2139                 return NULL;
2140 }
2141
2142 int intel_gpu_reset(struct drm_i915_private *dev_priv, unsigned engine_mask)
2143 {
2144         reset_func reset = intel_get_gpu_reset(dev_priv);
2145         int retry;
2146         int ret;
2147
2148         /*
2149          * We want to perform per-engine reset from atomic context (e.g.
2150          * softirq), which imposes the constraint that we cannot sleep.
2151          * However, experience suggests that spending a bit of time waiting
2152          * for a reset helps in various cases, so for a full-device reset
2153          * we apply the opposite rule and wait if we want to. As we should
2154          * always follow up a failed per-engine reset with a full device reset,
2155          * being a little faster, stricter and more error prone for the
2156          * atomic case seems an acceptable compromise.
2157          *
2158          * Unfortunately this leads to a bimodal routine, when the goal was
2159          * to have a single reset function that worked for resetting any
2160          * number of engines simultaneously.
2161          */
2162         might_sleep_if(engine_mask == ALL_ENGINES);
2163
2164         /*
2165          * If the power well sleeps during the reset, the reset
2166          * request may be dropped and never completes (causing -EIO).
2167          */
2168         intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
2169         for (retry = 0; retry < 3; retry++) {
2170
2171                 /*
2172                  * We stop engines, otherwise we might get failed reset and a
2173                  * dead gpu (on elk). Also as modern gpu as kbl can suffer
2174                  * from system hang if batchbuffer is progressing when
2175                  * the reset is issued, regardless of READY_TO_RESET ack.
2176                  * Thus assume it is best to stop engines on all gens
2177                  * where we have a gpu reset.
2178                  *
2179                  * WaMediaResetMainRingCleanup:ctg,elk (presumably)
2180                  *
2181                  * FIXME: Wa for more modern gens needs to be validated
2182                  */
2183                 i915_stop_engines(dev_priv, engine_mask);
2184
2185                 ret = -ENODEV;
2186                 if (reset) {
2187                         GEM_TRACE("engine_mask=%x\n", engine_mask);
2188                         ret = reset(dev_priv, engine_mask);
2189                 }
2190                 if (ret != -ETIMEDOUT || engine_mask != ALL_ENGINES)
2191                         break;
2192
2193                 cond_resched();
2194         }
2195         intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
2196
2197         return ret;
2198 }
2199
2200 bool intel_has_gpu_reset(struct drm_i915_private *dev_priv)
2201 {
2202         return intel_get_gpu_reset(dev_priv) != NULL;
2203 }
2204
2205 bool intel_has_reset_engine(struct drm_i915_private *dev_priv)
2206 {
2207         return (dev_priv->info.has_reset_engine &&
2208                 i915_modparams.reset >= 2);
2209 }
2210
2211 int intel_reset_guc(struct drm_i915_private *dev_priv)
2212 {
2213         u32 guc_domain = INTEL_GEN(dev_priv) >= 11 ? GEN11_GRDOM_GUC :
2214                                                      GEN9_GRDOM_GUC;
2215         int ret;
2216
2217         GEM_BUG_ON(!HAS_GUC(dev_priv));
2218
2219         intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
2220         ret = gen6_hw_domain_reset(dev_priv, guc_domain);
2221         intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
2222
2223         return ret;
2224 }
2225
2226 bool intel_uncore_unclaimed_mmio(struct drm_i915_private *dev_priv)
2227 {
2228         return check_for_unclaimed_mmio(dev_priv);
2229 }
2230
2231 bool
2232 intel_uncore_arm_unclaimed_mmio_detection(struct drm_i915_private *dev_priv)
2233 {
2234         if (unlikely(i915_modparams.mmio_debug ||
2235                      dev_priv->uncore.unclaimed_mmio_check <= 0))
2236                 return false;
2237
2238         if (unlikely(intel_uncore_unclaimed_mmio(dev_priv))) {
2239                 DRM_DEBUG("Unclaimed register detected, "
2240                           "enabling oneshot unclaimed register reporting. "
2241                           "Please use i915.mmio_debug=N for more information.\n");
2242                 i915_modparams.mmio_debug++;
2243                 dev_priv->uncore.unclaimed_mmio_check--;
2244                 return true;
2245         }
2246
2247         return false;
2248 }
2249
2250 static enum forcewake_domains
2251 intel_uncore_forcewake_for_read(struct drm_i915_private *dev_priv,
2252                                 i915_reg_t reg)
2253 {
2254         u32 offset = i915_mmio_reg_offset(reg);
2255         enum forcewake_domains fw_domains;
2256
2257         if (INTEL_GEN(dev_priv) >= 11) {
2258                 fw_domains = __gen11_fwtable_reg_read_fw_domains(offset);
2259         } else if (HAS_FWTABLE(dev_priv)) {
2260                 fw_domains = __fwtable_reg_read_fw_domains(offset);
2261         } else if (INTEL_GEN(dev_priv) >= 6) {
2262                 fw_domains = __gen6_reg_read_fw_domains(offset);
2263         } else {
2264                 WARN_ON(!IS_GEN(dev_priv, 2, 5));
2265                 fw_domains = 0;
2266         }
2267
2268         WARN_ON(fw_domains & ~dev_priv->uncore.fw_domains);
2269
2270         return fw_domains;
2271 }
2272
2273 static enum forcewake_domains
2274 intel_uncore_forcewake_for_write(struct drm_i915_private *dev_priv,
2275                                  i915_reg_t reg)
2276 {
2277         u32 offset = i915_mmio_reg_offset(reg);
2278         enum forcewake_domains fw_domains;
2279
2280         if (INTEL_GEN(dev_priv) >= 11) {
2281                 fw_domains = __gen11_fwtable_reg_write_fw_domains(offset);
2282         } else if (HAS_FWTABLE(dev_priv) && !IS_VALLEYVIEW(dev_priv)) {
2283                 fw_domains = __fwtable_reg_write_fw_domains(offset);
2284         } else if (IS_GEN8(dev_priv)) {
2285                 fw_domains = __gen8_reg_write_fw_domains(offset);
2286         } else if (IS_GEN(dev_priv, 6, 7)) {
2287                 fw_domains = FORCEWAKE_RENDER;
2288         } else {
2289                 WARN_ON(!IS_GEN(dev_priv, 2, 5));
2290                 fw_domains = 0;
2291         }
2292
2293         WARN_ON(fw_domains & ~dev_priv->uncore.fw_domains);
2294
2295         return fw_domains;
2296 }
2297
2298 /**
2299  * intel_uncore_forcewake_for_reg - which forcewake domains are needed to access
2300  *                                  a register
2301  * @dev_priv: pointer to struct drm_i915_private
2302  * @reg: register in question
2303  * @op: operation bitmask of FW_REG_READ and/or FW_REG_WRITE
2304  *
2305  * Returns a set of forcewake domains required to be taken with for example
2306  * intel_uncore_forcewake_get for the specified register to be accessible in the
2307  * specified mode (read, write or read/write) with raw mmio accessors.
2308  *
2309  * NOTE: On Gen6 and Gen7 write forcewake domain (FORCEWAKE_RENDER) requires the
2310  * callers to do FIFO management on their own or risk losing writes.
2311  */
2312 enum forcewake_domains
2313 intel_uncore_forcewake_for_reg(struct drm_i915_private *dev_priv,
2314                                i915_reg_t reg, unsigned int op)
2315 {
2316         enum forcewake_domains fw_domains = 0;
2317
2318         WARN_ON(!op);
2319
2320         if (intel_vgpu_active(dev_priv))
2321                 return 0;
2322
2323         if (op & FW_REG_READ)
2324                 fw_domains = intel_uncore_forcewake_for_read(dev_priv, reg);
2325
2326         if (op & FW_REG_WRITE)
2327                 fw_domains |= intel_uncore_forcewake_for_write(dev_priv, reg);
2328
2329         return fw_domains;
2330 }
2331
2332 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
2333 #include "selftests/mock_uncore.c"
2334 #include "selftests/intel_uncore.c"
2335 #endif