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 <linux/pm_runtime.h>
  25 #include <asm/iosf_mbi.h>
  26
  27 #include "i915_drv.h"
  28 #include "i915_trace.h"
  29 #include "i915_vgpu.h"
  30 #include "intel_pm.h"
  31
  32 #define FORCEWAKE_ACK_TIMEOUT_MS 50
  33 #define GT_FIFO_TIMEOUT_MS       10
  34
  35 #define __raw_posting_read(...) ((void)__raw_uncore_read32(__VA_ARGS__))
  36
  37 void
  38 intel_uncore_mmio_debug_init_early(struct intel_uncore_mmio_debug *mmio_debug)
  39 {
  40         spin_lock_init(&mmio_debug->lock);
  41         mmio_debug->unclaimed_mmio_check = 1;
  42 }
  43
  44 static void mmio_debug_suspend(struct intel_uncore_mmio_debug *mmio_debug)
  45 {
  46         lockdep_assert_held(&mmio_debug->lock);
  47
  48         /* Save and disable mmio debugging for the user bypass */
  49         if (!mmio_debug->suspend_count++) {
  50                 mmio_debug->saved_mmio_check = mmio_debug->unclaimed_mmio_check;
  51                 mmio_debug->unclaimed_mmio_check = 0;
  52         }
  53 }
  54
  55 static void mmio_debug_resume(struct intel_uncore_mmio_debug *mmio_debug)
  56 {
  57         lockdep_assert_held(&mmio_debug->lock);
  58
  59         if (!--mmio_debug->suspend_count)
  60                 mmio_debug->unclaimed_mmio_check = mmio_debug->saved_mmio_check;
  61 }
  62
  63 static const char * const forcewake_domain_names[] = {
  64         "render",
  65         "blitter",
  66         "media",
  67         "vdbox0",
  68         "vdbox1",
  69         "vdbox2",
  70         "vdbox3",
  71         "vebox0",
  72         "vebox1",
  73 };
  74
  75 const char *
  76 intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id)
  77 {
  78         BUILD_BUG_ON(ARRAY_SIZE(forcewake_domain_names) != FW_DOMAIN_ID_COUNT);
  79
  80         if (id >= 0 && id < FW_DOMAIN_ID_COUNT)
  81                 return forcewake_domain_names[id];
  82
  83         WARN_ON(id);
  84
  85         return "unknown";
  86 }
  87
  88 #define fw_ack(d) readl((d)->reg_ack)
  89 #define fw_set(d, val) writel(_MASKED_BIT_ENABLE((val)), (d)->reg_set)
  90 #define fw_clear(d, val) writel(_MASKED_BIT_DISABLE((val)), (d)->reg_set)
  91
  92 static inline void
  93 fw_domain_reset(const struct intel_uncore_forcewake_domain *d)
  94 {
  95         /*
  96          * We don't really know if the powerwell for the forcewake domain we are
  97          * trying to reset here does exist at this point (engines could be fused
  98          * off in ICL+), so no waiting for acks
  99          */
 100         /* WaRsClearFWBitsAtReset:bdw,skl */
 101         fw_clear(d, 0xffff);
 102 }
 103
 104 static inline void
 105 fw_domain_arm_timer(struct intel_uncore_forcewake_domain *d)
 106 {
 107         GEM_BUG_ON(d->uncore->fw_domains_timer & d->mask);
 108         d->uncore->fw_domains_timer |= d->mask;
 109         d->wake_count++;
 110         hrtimer_start_range_ns(&d->timer,
 111                                NSEC_PER_MSEC,
 112                                NSEC_PER_MSEC,
 113                                HRTIMER_MODE_REL);
 114 }
 115
 116 static inline int
 117 __wait_for_ack(const struct intel_uncore_forcewake_domain *d,
 118                const u32 ack,
 119                const u32 value)
 120 {
 121         return wait_for_atomic((fw_ack(d) & ack) == value,
 122                                FORCEWAKE_ACK_TIMEOUT_MS);
 123 }
 124
 125 static inline int
 126 wait_ack_clear(const struct intel_uncore_forcewake_domain *d,
 127                const u32 ack)
 128 {
 129         return __wait_for_ack(d, ack, 0);
 130 }
 131
 132 static inline int
 133 wait_ack_set(const struct intel_uncore_forcewake_domain *d,
 134              const u32 ack)
 135 {
 136         return __wait_for_ack(d, ack, ack);
 137 }
 138
 139 static inline void
 140 fw_domain_wait_ack_clear(const struct intel_uncore_forcewake_domain *d)
 141 {
 142         if (wait_ack_clear(d, FORCEWAKE_KERNEL)) {
 143                 DRM_ERROR("%s: timed out waiting for forcewake ack to clear.\n",
 144                           intel_uncore_forcewake_domain_to_str(d->id));
 145                 add_taint_for_CI(d->uncore->i915, TAINT_WARN); /* CI now unreliable */
 146         }
 147 }
 148
 149 enum ack_type {
 150         ACK_CLEAR = 0,
 151         ACK_SET
 152 };
 153
 154 static int
 155 fw_domain_wait_ack_with_fallback(const struct intel_uncore_forcewake_domain *d,
 156                                  const enum ack_type type)
 157 {
 158         const u32 ack_bit = FORCEWAKE_KERNEL;
 159         const u32 value = type == ACK_SET ? ack_bit : 0;
 160         unsigned int pass;
 161         bool ack_detected;
 162
 163         /*
 164          * There is a possibility of driver's wake request colliding
 165          * with hardware's own wake requests and that can cause
 166          * hardware to not deliver the driver's ack message.
 167          *
 168          * Use a fallback bit toggle to kick the gpu state machine
 169          * in the hope that the original ack will be delivered along with
 170          * the fallback ack.
 171          *
 172          * This workaround is described in HSDES #1604254524 and it's known as:
 173          * WaRsForcewakeAddDelayForAck:skl,bxt,kbl,glk,cfl,cnl,icl
 174          * although the name is a bit misleading.
 175          */
 176
 177         pass = 1;
 178         do {
 179                 wait_ack_clear(d, FORCEWAKE_KERNEL_FALLBACK);
 180
 181                 fw_set(d, FORCEWAKE_KERNEL_FALLBACK);
 182                 /* Give gt some time to relax before the polling frenzy */
 183                 udelay(10 * pass);
 184                 wait_ack_set(d, FORCEWAKE_KERNEL_FALLBACK);
 185
 186                 ack_detected = (fw_ack(d) & ack_bit) == value;
 187
 188                 fw_clear(d, FORCEWAKE_KERNEL_FALLBACK);
 189         } while (!ack_detected && pass++ < 10);
 190
 191         DRM_DEBUG_DRIVER("%s had to use fallback to %s ack, 0x%x (passes %u)\n",
 192                          intel_uncore_forcewake_domain_to_str(d->id),
 193                          type == ACK_SET ? "set" : "clear",
 194                          fw_ack(d),
 195                          pass);
 196
 197         return ack_detected ? 0 : -ETIMEDOUT;
 198 }
 199
 200 static inline void
 201 fw_domain_wait_ack_clear_fallback(const struct intel_uncore_forcewake_domain *d)
 202 {
 203         if (likely(!wait_ack_clear(d, FORCEWAKE_KERNEL)))
 204                 return;
 205
 206         if (fw_domain_wait_ack_with_fallback(d, ACK_CLEAR))
 207                 fw_domain_wait_ack_clear(d);
 208 }
 209
 210 static inline void
 211 fw_domain_get(const struct intel_uncore_forcewake_domain *d)
 212 {
 213         fw_set(d, FORCEWAKE_KERNEL);
 214 }
 215
 216 static inline void
 217 fw_domain_wait_ack_set(const struct intel_uncore_forcewake_domain *d)
 218 {
 219         if (wait_ack_set(d, FORCEWAKE_KERNEL)) {
 220                 DRM_ERROR("%s: timed out waiting for forcewake ack request.\n",
 221                           intel_uncore_forcewake_domain_to_str(d->id));
 222                 add_taint_for_CI(d->uncore->i915, TAINT_WARN); /* CI now unreliable */
 223         }
 224 }
 225
 226 static inline void
 227 fw_domain_wait_ack_set_fallback(const struct intel_uncore_forcewake_domain *d)
 228 {
 229         if (likely(!wait_ack_set(d, FORCEWAKE_KERNEL)))
 230                 return;
 231
 232         if (fw_domain_wait_ack_with_fallback(d, ACK_SET))
 233                 fw_domain_wait_ack_set(d);
 234 }
 235
 236 static inline void
 237 fw_domain_put(const struct intel_uncore_forcewake_domain *d)
 238 {
 239         fw_clear(d, FORCEWAKE_KERNEL);
 240 }
 241
 242 static void
 243 fw_domains_get(struct intel_uncore *uncore, enum forcewake_domains fw_domains)
 244 {
 245         struct intel_uncore_forcewake_domain *d;
 246         unsigned int tmp;
 247
 248         GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
 249
 250         for_each_fw_domain_masked(d, fw_domains, uncore, tmp) {
 251                 fw_domain_wait_ack_clear(d);
 252                 fw_domain_get(d);
 253         }
 254
 255         for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
 256                 fw_domain_wait_ack_set(d);
 257
 258         uncore->fw_domains_active |= fw_domains;
 259 }
 260
 261 static void
 262 fw_domains_get_with_fallback(struct intel_uncore *uncore,
 263                              enum forcewake_domains fw_domains)
 264 {
 265         struct intel_uncore_forcewake_domain *d;
 266         unsigned int tmp;
 267
 268         GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
 269
 270         for_each_fw_domain_masked(d, fw_domains, uncore, tmp) {
 271                 fw_domain_wait_ack_clear_fallback(d);
 272                 fw_domain_get(d);
 273         }
 274
 275         for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
 276                 fw_domain_wait_ack_set_fallback(d);
 277
 278         uncore->fw_domains_active |= fw_domains;
 279 }
 280
 281 static void
 282 fw_domains_put(struct intel_uncore *uncore, enum forcewake_domains fw_domains)
 283 {
 284         struct intel_uncore_forcewake_domain *d;
 285         unsigned int tmp;
 286
 287         GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
 288
 289         for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
 290                 fw_domain_put(d);
 291
 292         uncore->fw_domains_active &= ~fw_domains;
 293 }
 294
 295 static void
 296 fw_domains_reset(struct intel_uncore *uncore,
 297                  enum forcewake_domains fw_domains)
 298 {
 299         struct intel_uncore_forcewake_domain *d;
 300         unsigned int tmp;
 301
 302         if (!fw_domains)
 303                 return;
 304
 305         GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
 306
 307         for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
 308                 fw_domain_reset(d);
 309 }
 310
 311 static inline u32 gt_thread_status(struct intel_uncore *uncore)
 312 {
 313         u32 val;
 314
 315         val = __raw_uncore_read32(uncore, GEN6_GT_THREAD_STATUS_REG);
 316         val &= GEN6_GT_THREAD_STATUS_CORE_MASK;
 317
 318         return val;
 319 }
 320
 321 static void __gen6_gt_wait_for_thread_c0(struct intel_uncore *uncore)
 322 {
 323         /*
 324          * w/a for a sporadic read returning 0 by waiting for the GT
 325          * thread to wake up.
 326          */
 327         drm_WARN_ONCE(&uncore->i915->drm,
 328                       wait_for_atomic_us(gt_thread_status(uncore) == 0, 5000),
 329                       "GT thread status wait timed out\n");
 330 }
 331
 332 static void fw_domains_get_with_thread_status(struct intel_uncore *uncore,
 333                                               enum forcewake_domains fw_domains)
 334 {
 335         fw_domains_get(uncore, fw_domains);
 336
 337         /* WaRsForcewakeWaitTC0:snb,ivb,hsw,bdw,vlv */
 338         __gen6_gt_wait_for_thread_c0(uncore);
 339 }
 340
 341 static inline u32 fifo_free_entries(struct intel_uncore *uncore)
 342 {
 343         u32 count = __raw_uncore_read32(uncore, GTFIFOCTL);
 344
 345         return count & GT_FIFO_FREE_ENTRIES_MASK;
 346 }
 347
 348 static void __gen6_gt_wait_for_fifo(struct intel_uncore *uncore)
 349 {
 350         u32 n;
 351
 352         /* On VLV, FIFO will be shared by both SW and HW.
 353          * So, we need to read the FREE_ENTRIES everytime */
 354         if (IS_VALLEYVIEW(uncore->i915))
 355                 n = fifo_free_entries(uncore);
 356         else
 357                 n = uncore->fifo_count;
 358
 359         if (n <= GT_FIFO_NUM_RESERVED_ENTRIES) {
 360                 if (wait_for_atomic((n = fifo_free_entries(uncore)) >
 361                                     GT_FIFO_NUM_RESERVED_ENTRIES,
 362                                     GT_FIFO_TIMEOUT_MS)) {
 363                         drm_dbg(&uncore->i915->drm,
 364                                 "GT_FIFO timeout, entries: %u\n", n);
 365                         return;
 366                 }
 367         }
 368
 369         uncore->fifo_count = n - 1;
 370 }
 371
 372 static enum hrtimer_restart
 373 intel_uncore_fw_release_timer(struct hrtimer *timer)
 374 {
 375         struct intel_uncore_forcewake_domain *domain =
 376                container_of(timer, struct intel_uncore_forcewake_domain, timer);
 377         struct intel_uncore *uncore = domain->uncore;
 378         unsigned long irqflags;
 379
 380         assert_rpm_device_not_suspended(uncore->rpm);
 381
 382         if (xchg(&domain->active, false))
 383                 return HRTIMER_RESTART;
 384
 385         spin_lock_irqsave(&uncore->lock, irqflags);
 386
 387         uncore->fw_domains_timer &= ~domain->mask;
 388
 389         GEM_BUG_ON(!domain->wake_count);
 390         if (--domain->wake_count == 0)
 391                 uncore->funcs.force_wake_put(uncore, domain->mask);
 392
 393         spin_unlock_irqrestore(&uncore->lock, irqflags);
 394
 395         return HRTIMER_NORESTART;
 396 }
 397
 398 /* Note callers must have acquired the PUNIT->PMIC bus, before calling this. */
 399 static unsigned int
 400 intel_uncore_forcewake_reset(struct intel_uncore *uncore)
 401 {
 402         unsigned long irqflags;
 403         struct intel_uncore_forcewake_domain *domain;
 404         int retry_count = 100;
 405         enum forcewake_domains fw, active_domains;
 406
 407         iosf_mbi_assert_punit_acquired();
 408
 409         /* Hold uncore.lock across reset to prevent any register access
 410          * with forcewake not set correctly. Wait until all pending
 411          * timers are run before holding.
 412          */
 413         while (1) {
 414                 unsigned int tmp;
 415
 416                 active_domains = 0;
 417
 418                 for_each_fw_domain(domain, uncore, tmp) {
 419                         smp_store_mb(domain->active, false);
 420                         if (hrtimer_cancel(&domain->timer) == 0)
 421                                 continue;
 422
 423                         intel_uncore_fw_release_timer(&domain->timer);
 424                 }
 425
 426                 spin_lock_irqsave(&uncore->lock, irqflags);
 427
 428                 for_each_fw_domain(domain, uncore, tmp) {
 429                         if (hrtimer_active(&domain->timer))
 430                                 active_domains |= domain->mask;
 431                 }
 432
 433                 if (active_domains == 0)
 434                         break;
 435
 436                 if (--retry_count == 0) {
 437                         drm_err(&uncore->i915->drm, "Timed out waiting for forcewake timers to finish\n");
 438                         break;
 439                 }
 440
 441                 spin_unlock_irqrestore(&uncore->lock, irqflags);
 442                 cond_resched();
 443         }
 444
 445         drm_WARN_ON(&uncore->i915->drm, active_domains);
 446
 447         fw = uncore->fw_domains_active;
 448         if (fw)
 449                 uncore->funcs.force_wake_put(uncore, fw);
 450
 451         fw_domains_reset(uncore, uncore->fw_domains);
 452         assert_forcewakes_inactive(uncore);
 453
 454         spin_unlock_irqrestore(&uncore->lock, irqflags);
 455
 456         return fw; /* track the lost user forcewake domains */
 457 }
 458
 459 static bool
 460 fpga_check_for_unclaimed_mmio(struct intel_uncore *uncore)
 461 {
 462         u32 dbg;
 463
 464         dbg = __raw_uncore_read32(uncore, FPGA_DBG);
 465         if (likely(!(dbg & FPGA_DBG_RM_NOCLAIM)))
 466                 return false;
 467
 468         __raw_uncore_write32(uncore, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 469
 470         return true;
 471 }
 472
 473 static bool
 474 vlv_check_for_unclaimed_mmio(struct intel_uncore *uncore)
 475 {
 476         u32 cer;
 477
 478         cer = __raw_uncore_read32(uncore, CLAIM_ER);
 479         if (likely(!(cer & (CLAIM_ER_OVERFLOW | CLAIM_ER_CTR_MASK))))
 480                 return false;
 481
 482         __raw_uncore_write32(uncore, CLAIM_ER, CLAIM_ER_CLR);
 483
 484         return true;
 485 }
 486
 487 static bool
 488 gen6_check_for_fifo_debug(struct intel_uncore *uncore)
 489 {
 490         u32 fifodbg;
 491
 492         fifodbg = __raw_uncore_read32(uncore, GTFIFODBG);
 493
 494         if (unlikely(fifodbg)) {
 495                 drm_dbg(&uncore->i915->drm, "GTFIFODBG = 0x08%x\n", fifodbg);
 496                 __raw_uncore_write32(uncore, GTFIFODBG, fifodbg);
 497         }
 498
 499         return fifodbg;
 500 }
 501
 502 static bool
 503 check_for_unclaimed_mmio(struct intel_uncore *uncore)
 504 {
 505         bool ret = false;
 506
 507         lockdep_assert_held(&uncore->debug->lock);
 508
 509         if (uncore->debug->suspend_count)
 510                 return false;
 511
 512         if (intel_uncore_has_fpga_dbg_unclaimed(uncore))
 513                 ret |= fpga_check_for_unclaimed_mmio(uncore);
 514
 515         if (intel_uncore_has_dbg_unclaimed(uncore))
 516                 ret |= vlv_check_for_unclaimed_mmio(uncore);
 517
 518         if (intel_uncore_has_fifo(uncore))
 519                 ret |= gen6_check_for_fifo_debug(uncore);
 520
 521         return ret;
 522 }
 523
 524 static void forcewake_early_sanitize(struct intel_uncore *uncore,
 525                                      unsigned int restore_forcewake)
 526 {
 527         GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
 528
 529         /* WaDisableShadowRegForCpd:chv */
 530         if (IS_CHERRYVIEW(uncore->i915)) {
 531                 __raw_uncore_write32(uncore, GTFIFOCTL,
 532                                      __raw_uncore_read32(uncore, GTFIFOCTL) |
 533                                      GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL |
 534                                      GT_FIFO_CTL_RC6_POLICY_STALL);
 535         }
 536
 537         iosf_mbi_punit_acquire();
 538         intel_uncore_forcewake_reset(uncore);
 539         if (restore_forcewake) {
 540                 spin_lock_irq(&uncore->lock);
 541                 uncore->funcs.force_wake_get(uncore, restore_forcewake);
 542
 543                 if (intel_uncore_has_fifo(uncore))
 544                         uncore->fifo_count = fifo_free_entries(uncore);
 545                 spin_unlock_irq(&uncore->lock);
 546         }
 547         iosf_mbi_punit_release();
 548 }
 549
 550 void intel_uncore_suspend(struct intel_uncore *uncore)
 551 {
 552         if (!intel_uncore_has_forcewake(uncore))
 553                 return;
 554
 555         iosf_mbi_punit_acquire();
 556         iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
 557                 &uncore->pmic_bus_access_nb);
 558         uncore->fw_domains_saved = intel_uncore_forcewake_reset(uncore);
 559         iosf_mbi_punit_release();
 560 }
 561
 562 void intel_uncore_resume_early(struct intel_uncore *uncore)
 563 {
 564         unsigned int restore_forcewake;
 565
 566         if (intel_uncore_unclaimed_mmio(uncore))
 567                 drm_dbg(&uncore->i915->drm, "unclaimed mmio detected on resume, clearing\n");
 568
 569         if (!intel_uncore_has_forcewake(uncore))
 570                 return;
 571
 572         restore_forcewake = fetch_and_zero(&uncore->fw_domains_saved);
 573         forcewake_early_sanitize(uncore, restore_forcewake);
 574
 575         iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
 576 }
 577
 578 void intel_uncore_runtime_resume(struct intel_uncore *uncore)
 579 {
 580         if (!intel_uncore_has_forcewake(uncore))
 581                 return;
 582
 583         iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
 584 }
 585
 586 static void __intel_uncore_forcewake_get(struct intel_uncore *uncore,
 587                                          enum forcewake_domains fw_domains)
 588 {
 589         struct intel_uncore_forcewake_domain *domain;
 590         unsigned int tmp;
 591
 592         fw_domains &= uncore->fw_domains;
 593
 594         for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
 595                 if (domain->wake_count++) {
 596                         fw_domains &= ~domain->mask;
 597                         domain->active = true;
 598                 }
 599         }
 600
 601         if (fw_domains)
 602                 uncore->funcs.force_wake_get(uncore, fw_domains);
 603 }
 604
 605 /**
 606  * intel_uncore_forcewake_get - grab forcewake domain references
 607  * @uncore: the intel_uncore structure
 608  * @fw_domains: forcewake domains to get reference on
 609  *
 610  * This function can be used get GT's forcewake domain references.
 611  * Normal register access will handle the forcewake domains automatically.
 612  * However if some sequence requires the GT to not power down a particular
 613  * forcewake domains this function should be called at the beginning of the
 614  * sequence. And subsequently the reference should be dropped by symmetric
 615  * call to intel_unforce_forcewake_put(). Usually caller wants all the domains
 616  * to be kept awake so the @fw_domains would be then FORCEWAKE_ALL.
 617  */
 618 void intel_uncore_forcewake_get(struct intel_uncore *uncore,
 619                                 enum forcewake_domains fw_domains)
 620 {
 621         unsigned long irqflags;
 622
 623         if (!uncore->funcs.force_wake_get)
 624                 return;
 625
 626         assert_rpm_wakelock_held(uncore->rpm);
 627
 628         spin_lock_irqsave(&uncore->lock, irqflags);
 629         __intel_uncore_forcewake_get(uncore, fw_domains);
 630         spin_unlock_irqrestore(&uncore->lock, irqflags);
 631 }
 632
 633 /**
 634  * intel_uncore_forcewake_user_get - claim forcewake on behalf of userspace
 635  * @uncore: the intel_uncore structure
 636  *
 637  * This function is a wrapper around intel_uncore_forcewake_get() to acquire
 638  * the GT powerwell and in the process disable our debugging for the
 639  * duration of userspace's bypass.
 640  */
 641 void intel_uncore_forcewake_user_get(struct intel_uncore *uncore)
 642 {
 643         spin_lock_irq(&uncore->lock);
 644         if (!uncore->user_forcewake_count++) {
 645                 intel_uncore_forcewake_get__locked(uncore, FORCEWAKE_ALL);
 646                 spin_lock(&uncore->debug->lock);
 647                 mmio_debug_suspend(uncore->debug);
 648                 spin_unlock(&uncore->debug->lock);
 649         }
 650         spin_unlock_irq(&uncore->lock);
 651 }
 652
 653 /**
 654  * intel_uncore_forcewake_user_put - release forcewake on behalf of userspace
 655  * @uncore: the intel_uncore structure
 656  *
 657  * This function complements intel_uncore_forcewake_user_get() and releases
 658  * the GT powerwell taken on behalf of the userspace bypass.
 659  */
 660 void intel_uncore_forcewake_user_put(struct intel_uncore *uncore)
 661 {
 662         spin_lock_irq(&uncore->lock);
 663         if (!--uncore->user_forcewake_count) {
 664                 spin_lock(&uncore->debug->lock);
 665                 mmio_debug_resume(uncore->debug);
 666
 667                 if (check_for_unclaimed_mmio(uncore))
 668                         drm_info(&uncore->i915->drm,
 669                                  "Invalid mmio detected during user access\n");
 670                 spin_unlock(&uncore->debug->lock);
 671
 672                 intel_uncore_forcewake_put__locked(uncore, FORCEWAKE_ALL);
 673         }
 674         spin_unlock_irq(&uncore->lock);
 675 }
 676
 677 /**
 678  * intel_uncore_forcewake_get__locked - grab forcewake domain references
 679  * @uncore: the intel_uncore structure
 680  * @fw_domains: forcewake domains to get reference on
 681  *
 682  * See intel_uncore_forcewake_get(). This variant places the onus
 683  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
 684  */
 685 void intel_uncore_forcewake_get__locked(struct intel_uncore *uncore,
 686                                         enum forcewake_domains fw_domains)
 687 {
 688         lockdep_assert_held(&uncore->lock);
 689
 690         if (!uncore->funcs.force_wake_get)
 691                 return;
 692
 693         __intel_uncore_forcewake_get(uncore, fw_domains);
 694 }
 695
 696 static void __intel_uncore_forcewake_put(struct intel_uncore *uncore,
 697                                          enum forcewake_domains fw_domains)
 698 {
 699         struct intel_uncore_forcewake_domain *domain;
 700         unsigned int tmp;
 701
 702         fw_domains &= uncore->fw_domains;
 703
 704         for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
 705                 GEM_BUG_ON(!domain->wake_count);
 706
 707                 if (--domain->wake_count) {
 708                         domain->active = true;
 709                         continue;
 710                 }
 711
 712                 uncore->funcs.force_wake_put(uncore, domain->mask);
 713         }
 714 }
 715
 716 /**
 717  * intel_uncore_forcewake_put - release a forcewake domain reference
 718  * @uncore: the intel_uncore structure
 719  * @fw_domains: forcewake domains to put references
 720  *
 721  * This function drops the device-level forcewakes for specified
 722  * domains obtained by intel_uncore_forcewake_get().
 723  */
 724 void intel_uncore_forcewake_put(struct intel_uncore *uncore,
 725                                 enum forcewake_domains fw_domains)
 726 {
 727         unsigned long irqflags;
 728
 729         if (!uncore->funcs.force_wake_put)
 730                 return;
 731
 732         spin_lock_irqsave(&uncore->lock, irqflags);
 733         __intel_uncore_forcewake_put(uncore, fw_domains);
 734         spin_unlock_irqrestore(&uncore->lock, irqflags);
 735 }
 736
 737 /**
 738  * intel_uncore_forcewake_flush - flush the delayed release
 739  * @uncore: the intel_uncore structure
 740  * @fw_domains: forcewake domains to flush
 741  */
 742 void intel_uncore_forcewake_flush(struct intel_uncore *uncore,
 743                                   enum forcewake_domains fw_domains)
 744 {
 745         struct intel_uncore_forcewake_domain *domain;
 746         unsigned int tmp;
 747
 748         if (!uncore->funcs.force_wake_put)
 749                 return;
 750
 751         fw_domains &= uncore->fw_domains;
 752         for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
 753                 WRITE_ONCE(domain->active, false);
 754                 if (hrtimer_cancel(&domain->timer))
 755                         intel_uncore_fw_release_timer(&domain->timer);
 756         }
 757 }
 758
 759 /**
 760  * intel_uncore_forcewake_put__locked - grab forcewake domain references
 761  * @uncore: the intel_uncore structure
 762  * @fw_domains: forcewake domains to get reference on
 763  *
 764  * See intel_uncore_forcewake_put(). This variant places the onus
 765  * on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
 766  */
 767 void intel_uncore_forcewake_put__locked(struct intel_uncore *uncore,
 768                                         enum forcewake_domains fw_domains)
 769 {
 770         lockdep_assert_held(&uncore->lock);
 771
 772         if (!uncore->funcs.force_wake_put)
 773                 return;
 774
 775         __intel_uncore_forcewake_put(uncore, fw_domains);
 776 }
 777
 778 void assert_forcewakes_inactive(struct intel_uncore *uncore)
 779 {
 780         if (!uncore->funcs.force_wake_get)
 781                 return;
 782
 783         drm_WARN(&uncore->i915->drm, uncore->fw_domains_active,
 784                  "Expected all fw_domains to be inactive, but %08x are still on\n",
 785                  uncore->fw_domains_active);
 786 }
 787
 788 void assert_forcewakes_active(struct intel_uncore *uncore,
 789                               enum forcewake_domains fw_domains)
 790 {
 791         struct intel_uncore_forcewake_domain *domain;
 792         unsigned int tmp;
 793
 794         if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM))
 795                 return;
 796
 797         if (!uncore->funcs.force_wake_get)
 798                 return;
 799
 800         spin_lock_irq(&uncore->lock);
 801
 802         assert_rpm_wakelock_held(uncore->rpm);
 803
 804         fw_domains &= uncore->fw_domains;
 805         drm_WARN(&uncore->i915->drm, fw_domains & ~uncore->fw_domains_active,
 806                  "Expected %08x fw_domains to be active, but %08x are off\n",
 807                  fw_domains, fw_domains & ~uncore->fw_domains_active);
 808
 809         /*
 810          * Check that the caller has an explicit wakeref and we don't mistake
 811          * it for the auto wakeref.
 812          */
 813         for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
 814                 unsigned int actual = READ_ONCE(domain->wake_count);
 815                 unsigned int expect = 1;
 816
 817                 if (uncore->fw_domains_timer & domain->mask)
 818                         expect++; /* pending automatic release */
 819
 820                 if (drm_WARN(&uncore->i915->drm, actual < expect,
 821                              "Expected domain %d to be held awake by caller, count=%d\n",
 822                              domain->id, actual))
 823                         break;
 824         }
 825
 826         spin_unlock_irq(&uncore->lock);
 827 }
 828
 829 /* We give fast paths for the really cool registers */
 830 #define NEEDS_FORCE_WAKE(reg) ((reg) < 0x40000)
 831
 832 #define __gen6_reg_read_fw_domains(uncore, offset) \
 833 ({ \
 834         enum forcewake_domains __fwd; \
 835         if (NEEDS_FORCE_WAKE(offset)) \
 836                 __fwd = FORCEWAKE_RENDER; \
 837         else \
 838                 __fwd = 0; \
 839         __fwd; \
 840 })
 841
 842 static int fw_range_cmp(u32 offset, const struct intel_forcewake_range *entry)
 843 {
 844         if (offset < entry->start)
 845                 return -1;
 846         else if (offset > entry->end)
 847                 return 1;
 848         else
 849                 return 0;
 850 }
 851
 852 /* Copied and "macroized" from lib/bsearch.c */
 853 #define BSEARCH(key, base, num, cmp) ({                                 \
 854         unsigned int start__ = 0, end__ = (num);                        \
 855         typeof(base) result__ = NULL;                                   \
 856         while (start__ < end__) {                                       \
 857                 unsigned int mid__ = start__ + (end__ - start__) / 2;   \
 858                 int ret__ = (cmp)((key), (base) + mid__);               \
 859                 if (ret__ < 0) {                                        \
 860                         end__ = mid__;                                  \
 861                 } else if (ret__ > 0) {                                 \
 862                         start__ = mid__ + 1;                            \
 863                 } else {                                                \
 864                         result__ = (base) + mid__;                      \
 865                         break;                                          \
 866                 }                                                       \
 867         }                                                               \
 868         result__;                                                       \
 869 })
 870
 871 static enum forcewake_domains
 872 find_fw_domain(struct intel_uncore *uncore, u32 offset)
 873 {
 874         const struct intel_forcewake_range *entry;
 875
 876         entry = BSEARCH(offset,
 877                         uncore->fw_domains_table,
 878                         uncore->fw_domains_table_entries,
 879                         fw_range_cmp);
 880
 881         if (!entry)
 882                 return 0;
 883
 884         /*
 885          * The list of FW domains depends on the SKU in gen11+ so we
 886          * can't determine it statically. We use FORCEWAKE_ALL and
 887          * translate it here to the list of available domains.
 888          */
 889         if (entry->domains == FORCEWAKE_ALL)
 890                 return uncore->fw_domains;
 891
 892         drm_WARN(&uncore->i915->drm, entry->domains & ~uncore->fw_domains,
 893                  "Uninitialized forcewake domain(s) 0x%x accessed at 0x%x\n",
 894                  entry->domains & ~uncore->fw_domains, offset);
 895
 896         return entry->domains;
 897 }
 898
 899 #define GEN_FW_RANGE(s, e, d) \
 900         { .start = (s), .end = (e), .domains = (d) }
 901
 902 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
 903 static const struct intel_forcewake_range __vlv_fw_ranges[] = {
 904         GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
 905         GEN_FW_RANGE(0x5000, 0x7fff, FORCEWAKE_RENDER),
 906         GEN_FW_RANGE(0xb000, 0x11fff, FORCEWAKE_RENDER),
 907         GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
 908         GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_MEDIA),
 909         GEN_FW_RANGE(0x2e000, 0x2ffff, FORCEWAKE_RENDER),
 910         GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
 911 };
 912
 913 #define __fwtable_reg_read_fw_domains(uncore, offset) \
 914 ({ \
 915         enum forcewake_domains __fwd = 0; \
 916         if (NEEDS_FORCE_WAKE((offset))) \
 917                 __fwd = find_fw_domain(uncore, offset); \
 918         __fwd; \
 919 })
 920
 921 #define __gen11_fwtable_reg_read_fw_domains(uncore, offset) \
 922         find_fw_domain(uncore, offset)
 923
 924 #define __gen12_fwtable_reg_read_fw_domains(uncore, offset) \
 925         find_fw_domain(uncore, offset)
 926
 927 /* *Must* be sorted by offset! See intel_shadow_table_check(). */
 928 static const i915_reg_t gen8_shadowed_regs[] = {
 929         RING_TAIL(RENDER_RING_BASE),    /* 0x2000 (base) */
 930         GEN6_RPNSWREQ,                  /* 0xA008 */
 931         GEN6_RC_VIDEO_FREQ,             /* 0xA00C */
 932         RING_TAIL(GEN6_BSD_RING_BASE),  /* 0x12000 (base) */
 933         RING_TAIL(VEBOX_RING_BASE),     /* 0x1a000 (base) */
 934         RING_TAIL(BLT_RING_BASE),       /* 0x22000 (base) */
 935         /* TODO: Other registers are not yet used */
 936 };
 937
 938 static const i915_reg_t gen11_shadowed_regs[] = {
 939         RING_TAIL(RENDER_RING_BASE),            /* 0x2000 (base) */
 940         GEN6_RPNSWREQ,                          /* 0xA008 */
 941         GEN6_RC_VIDEO_FREQ,                     /* 0xA00C */
 942         RING_TAIL(BLT_RING_BASE),               /* 0x22000 (base) */
 943         RING_TAIL(GEN11_BSD_RING_BASE),         /* 0x1C0000 (base) */
 944         RING_TAIL(GEN11_BSD2_RING_BASE),        /* 0x1C4000 (base) */
 945         RING_TAIL(GEN11_VEBOX_RING_BASE),       /* 0x1C8000 (base) */
 946         RING_TAIL(GEN11_BSD3_RING_BASE),        /* 0x1D0000 (base) */
 947         RING_TAIL(GEN11_BSD4_RING_BASE),        /* 0x1D4000 (base) */
 948         RING_TAIL(GEN11_VEBOX2_RING_BASE),      /* 0x1D8000 (base) */
 949         /* TODO: Other registers are not yet used */
 950 };
 951
 952 static const i915_reg_t gen12_shadowed_regs[] = {
 953         RING_TAIL(RENDER_RING_BASE),            /* 0x2000 (base) */
 954         GEN6_RPNSWREQ,                          /* 0xA008 */
 955         GEN6_RC_VIDEO_FREQ,                     /* 0xA00C */
 956         RING_TAIL(BLT_RING_BASE),               /* 0x22000 (base) */
 957         RING_TAIL(GEN11_BSD_RING_BASE),         /* 0x1C0000 (base) */
 958         RING_TAIL(GEN11_BSD2_RING_BASE),        /* 0x1C4000 (base) */
 959         RING_TAIL(GEN11_VEBOX_RING_BASE),       /* 0x1C8000 (base) */
 960         RING_TAIL(GEN11_BSD3_RING_BASE),        /* 0x1D0000 (base) */
 961         RING_TAIL(GEN11_BSD4_RING_BASE),        /* 0x1D4000 (base) */
 962         RING_TAIL(GEN11_VEBOX2_RING_BASE),      /* 0x1D8000 (base) */
 963         /* TODO: Other registers are not yet used */
 964 };
 965
 966 static int mmio_reg_cmp(u32 key, const i915_reg_t *reg)
 967 {
 968         u32 offset = i915_mmio_reg_offset(*reg);
 969
 970         if (key < offset)
 971                 return -1;
 972         else if (key > offset)
 973                 return 1;
 974         else
 975                 return 0;
 976 }
 977
 978 #define __is_genX_shadowed(x) \
 979 static bool is_gen##x##_shadowed(u32 offset) \
 980 { \
 981         const i915_reg_t *regs = gen##x##_shadowed_regs; \
 982         return BSEARCH(offset, regs, ARRAY_SIZE(gen##x##_shadowed_regs), \
 983                        mmio_reg_cmp); \
 984 }
 985
 986 __is_genX_shadowed(8)
 987 __is_genX_shadowed(11)
 988 __is_genX_shadowed(12)
 989
 990 static enum forcewake_domains
 991 gen6_reg_write_fw_domains(struct intel_uncore *uncore, i915_reg_t reg)
 992 {
 993         return FORCEWAKE_RENDER;
 994 }
 995
 996 #define __gen8_reg_write_fw_domains(uncore, offset) \
 997 ({ \
 998         enum forcewake_domains __fwd; \
 999         if (NEEDS_FORCE_WAKE(offset) && !is_gen8_shadowed(offset)) \
1000                 __fwd = FORCEWAKE_RENDER; \
1001         else \
1002                 __fwd = 0; \
1003         __fwd; \
1004 })
1005
1006 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1007 static const struct intel_forcewake_range __chv_fw_ranges[] = {
1008         GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
1009         GEN_FW_RANGE(0x4000, 0x4fff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1010         GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1011         GEN_FW_RANGE(0x8000, 0x82ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1012         GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1013         GEN_FW_RANGE(0x8500, 0x85ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1014         GEN_FW_RANGE(0x8800, 0x88ff, FORCEWAKE_MEDIA),
1015         GEN_FW_RANGE(0x9000, 0xafff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1016         GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1017         GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
1018         GEN_FW_RANGE(0xe000, 0xe7ff, FORCEWAKE_RENDER),
1019         GEN_FW_RANGE(0xf000, 0xffff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1020         GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
1021         GEN_FW_RANGE(0x1a000, 0x1bfff, FORCEWAKE_MEDIA),
1022         GEN_FW_RANGE(0x1e800, 0x1e9ff, FORCEWAKE_MEDIA),
1023         GEN_FW_RANGE(0x30000, 0x37fff, FORCEWAKE_MEDIA),
1024 };
1025
1026 #define __fwtable_reg_write_fw_domains(uncore, offset) \
1027 ({ \
1028         enum forcewake_domains __fwd = 0; \
1029         if (NEEDS_FORCE_WAKE((offset)) && !is_gen8_shadowed(offset)) \
1030                 __fwd = find_fw_domain(uncore, offset); \
1031         __fwd; \
1032 })
1033
1034 #define __gen11_fwtable_reg_write_fw_domains(uncore, offset) \
1035 ({ \
1036         enum forcewake_domains __fwd = 0; \
1037         const u32 __offset = (offset); \
1038         if (!is_gen11_shadowed(__offset)) \
1039                 __fwd = find_fw_domain(uncore, __offset); \
1040         __fwd; \
1041 })
1042
1043 #define __gen12_fwtable_reg_write_fw_domains(uncore, offset) \
1044 ({ \
1045         enum forcewake_domains __fwd = 0; \
1046         const u32 __offset = (offset); \
1047         if (!is_gen12_shadowed(__offset)) \
1048                 __fwd = find_fw_domain(uncore, __offset); \
1049         __fwd; \
1050 })
1051
1052 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1053 static const struct intel_forcewake_range __gen9_fw_ranges[] = {
1054         GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER),
1055         GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
1056         GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1057         GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
1058         GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1059         GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
1060         GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1061         GEN_FW_RANGE(0x8000, 0x812f, FORCEWAKE_BLITTER),
1062         GEN_FW_RANGE(0x8130, 0x813f, FORCEWAKE_MEDIA),
1063         GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1064         GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
1065         GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1066         GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_BLITTER),
1067         GEN_FW_RANGE(0x8800, 0x89ff, FORCEWAKE_MEDIA),
1068         GEN_FW_RANGE(0x8a00, 0x8bff, FORCEWAKE_BLITTER),
1069         GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1070         GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_BLITTER),
1071         GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
1072         GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER),
1073         GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1074         GEN_FW_RANGE(0xb480, 0xcfff, FORCEWAKE_BLITTER),
1075         GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
1076         GEN_FW_RANGE(0xd800, 0xdfff, FORCEWAKE_BLITTER),
1077         GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
1078         GEN_FW_RANGE(0xe900, 0x11fff, FORCEWAKE_BLITTER),
1079         GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
1080         GEN_FW_RANGE(0x14000, 0x19fff, FORCEWAKE_BLITTER),
1081         GEN_FW_RANGE(0x1a000, 0x1e9ff, FORCEWAKE_MEDIA),
1082         GEN_FW_RANGE(0x1ea00, 0x243ff, FORCEWAKE_BLITTER),
1083         GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
1084         GEN_FW_RANGE(0x24800, 0x2ffff, FORCEWAKE_BLITTER),
1085         GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
1086 };
1087
1088 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1089 static const struct intel_forcewake_range __gen11_fw_ranges[] = {
1090         GEN_FW_RANGE(0x0, 0x1fff, 0), /* uncore range */
1091         GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1092         GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
1093         GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1094         GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
1095         GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1096         GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_BLITTER),
1097         GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1098         GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
1099         GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1100         GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_BLITTER),
1101         GEN_FW_RANGE(0x8800, 0x8bff, 0),
1102         GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1103         GEN_FW_RANGE(0x8d00, 0x94cf, FORCEWAKE_BLITTER),
1104         GEN_FW_RANGE(0x94d0, 0x955f, FORCEWAKE_RENDER),
1105         GEN_FW_RANGE(0x9560, 0x95ff, 0),
1106         GEN_FW_RANGE(0x9600, 0xafff, FORCEWAKE_BLITTER),
1107         GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1108         GEN_FW_RANGE(0xb480, 0xdeff, FORCEWAKE_BLITTER),
1109         GEN_FW_RANGE(0xdf00, 0xe8ff, FORCEWAKE_RENDER),
1110         GEN_FW_RANGE(0xe900, 0x16dff, FORCEWAKE_BLITTER),
1111         GEN_FW_RANGE(0x16e00, 0x19fff, FORCEWAKE_RENDER),
1112         GEN_FW_RANGE(0x1a000, 0x23fff, FORCEWAKE_BLITTER),
1113         GEN_FW_RANGE(0x24000, 0x2407f, 0),
1114         GEN_FW_RANGE(0x24080, 0x2417f, FORCEWAKE_BLITTER),
1115         GEN_FW_RANGE(0x24180, 0x242ff, FORCEWAKE_RENDER),
1116         GEN_FW_RANGE(0x24300, 0x243ff, FORCEWAKE_BLITTER),
1117         GEN_FW_RANGE(0x24400, 0x24fff, FORCEWAKE_RENDER),
1118         GEN_FW_RANGE(0x25000, 0x3ffff, FORCEWAKE_BLITTER),
1119         GEN_FW_RANGE(0x40000, 0x1bffff, 0),
1120         GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0),
1121         GEN_FW_RANGE(0x1c4000, 0x1c7fff, 0),
1122         GEN_FW_RANGE(0x1c8000, 0x1cffff, FORCEWAKE_MEDIA_VEBOX0),
1123         GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2),
1124         GEN_FW_RANGE(0x1d4000, 0x1dbfff, 0)
1125 };
1126
1127 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
1128 static const struct intel_forcewake_range __gen12_fw_ranges[] = {
1129         GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER),
1130         GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
1131         GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
1132         GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
1133         GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
1134         GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
1135         GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
1136         GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_BLITTER),
1137         GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
1138         GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
1139         GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
1140         GEN_FW_RANGE(0x8500, 0x8bff, FORCEWAKE_BLITTER),
1141         GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
1142         GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_BLITTER),
1143         GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_ALL),
1144         GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER),
1145         GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
1146         GEN_FW_RANGE(0xb480, 0xdfff, FORCEWAKE_BLITTER),
1147         GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
1148         GEN_FW_RANGE(0xe900, 0x147ff, FORCEWAKE_BLITTER),
1149         GEN_FW_RANGE(0x14800, 0x148ff, FORCEWAKE_RENDER),
1150         GEN_FW_RANGE(0x14900, 0x19fff, FORCEWAKE_BLITTER),
1151         GEN_FW_RANGE(0x1a000, 0x1a7ff, FORCEWAKE_RENDER),
1152         GEN_FW_RANGE(0x1a800, 0x1afff, FORCEWAKE_BLITTER),
1153         GEN_FW_RANGE(0x1b000, 0x1bfff, FORCEWAKE_RENDER),
1154         GEN_FW_RANGE(0x1c000, 0x243ff, FORCEWAKE_BLITTER),
1155         GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
1156         GEN_FW_RANGE(0x24800, 0x3ffff, FORCEWAKE_BLITTER),
1157         GEN_FW_RANGE(0x40000, 0x1bffff, 0),
1158         GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0),
1159         GEN_FW_RANGE(0x1c4000, 0x1c7fff, FORCEWAKE_MEDIA_VDBOX1),
1160         GEN_FW_RANGE(0x1c8000, 0x1cbfff, FORCEWAKE_MEDIA_VEBOX0),
1161         GEN_FW_RANGE(0x1cc000, 0x1cffff, FORCEWAKE_BLITTER),
1162         GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2),
1163         GEN_FW_RANGE(0x1d4000, 0x1d7fff, FORCEWAKE_MEDIA_VDBOX3),
1164         GEN_FW_RANGE(0x1d8000, 0x1dbfff, FORCEWAKE_MEDIA_VEBOX1)
1165 };
1166
1167 static void
1168 ilk_dummy_write(struct intel_uncore *uncore)
1169 {
1170         /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
1171          * the chip from rc6 before touching it for real. MI_MODE is masked,
1172          * hence harmless to write 0 into. */
1173         __raw_uncore_write32(uncore, MI_MODE, 0);
1174 }
1175
1176 static void
1177 __unclaimed_reg_debug(struct intel_uncore *uncore,
1178                       const i915_reg_t reg,
1179                       const bool read,
1180                       const bool before)
1181 {
1182         if (drm_WARN(&uncore->i915->drm,
1183                      check_for_unclaimed_mmio(uncore) && !before,
1184                      "Unclaimed %s register 0x%x\n",
1185                      read ? "read from" : "write to",
1186                      i915_mmio_reg_offset(reg)))
1187                 /* Only report the first N failures */
1188                 uncore->i915->params.mmio_debug--;
1189 }
1190
1191 static inline void
1192 unclaimed_reg_debug(struct intel_uncore *uncore,
1193                     const i915_reg_t reg,
1194                     const bool read,
1195                     const bool before)
1196 {
1197         if (likely(!uncore->i915->params.mmio_debug))
1198                 return;
1199
1200         /* interrupts are disabled and re-enabled around uncore->lock usage */
1201         lockdep_assert_held(&uncore->lock);
1202
1203         if (before)
1204                 spin_lock(&uncore->debug->lock);
1205
1206         __unclaimed_reg_debug(uncore, reg, read, before);
1207
1208         if (!before)
1209                 spin_unlock(&uncore->debug->lock);
1210 }
1211
1212 #define __vgpu_read(x) \
1213 static u##x \
1214 vgpu_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1215         u##x val = __raw_uncore_read##x(uncore, reg); \
1216         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1217         return val; \
1218 }
1219 __vgpu_read(8)
1220 __vgpu_read(16)
1221 __vgpu_read(32)
1222 __vgpu_read(64)
1223
1224 #define GEN2_READ_HEADER(x) \
1225         u##x val = 0; \
1226         assert_rpm_wakelock_held(uncore->rpm);
1227
1228 #define GEN2_READ_FOOTER \
1229         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1230         return val
1231
1232 #define __gen2_read(x) \
1233 static u##x \
1234 gen2_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1235         GEN2_READ_HEADER(x); \
1236         val = __raw_uncore_read##x(uncore, reg); \
1237         GEN2_READ_FOOTER; \
1238 }
1239
1240 #define __gen5_read(x) \
1241 static u##x \
1242 gen5_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1243         GEN2_READ_HEADER(x); \
1244         ilk_dummy_write(uncore); \
1245         val = __raw_uncore_read##x(uncore, reg); \
1246         GEN2_READ_FOOTER; \
1247 }
1248
1249 __gen5_read(8)
1250 __gen5_read(16)
1251 __gen5_read(32)
1252 __gen5_read(64)
1253 __gen2_read(8)
1254 __gen2_read(16)
1255 __gen2_read(32)
1256 __gen2_read(64)
1257
1258 #undef __gen5_read
1259 #undef __gen2_read
1260
1261 #undef GEN2_READ_FOOTER
1262 #undef GEN2_READ_HEADER
1263
1264 #define GEN6_READ_HEADER(x) \
1265         u32 offset = i915_mmio_reg_offset(reg); \
1266         unsigned long irqflags; \
1267         u##x val = 0; \
1268         assert_rpm_wakelock_held(uncore->rpm); \
1269         spin_lock_irqsave(&uncore->lock, irqflags); \
1270         unclaimed_reg_debug(uncore, reg, true, true)
1271
1272 #define GEN6_READ_FOOTER \
1273         unclaimed_reg_debug(uncore, reg, true, false); \
1274         spin_unlock_irqrestore(&uncore->lock, irqflags); \
1275         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
1276         return val
1277
1278 static noinline void ___force_wake_auto(struct intel_uncore *uncore,
1279                                         enum forcewake_domains fw_domains)
1280 {
1281         struct intel_uncore_forcewake_domain *domain;
1282         unsigned int tmp;
1283
1284         GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
1285
1286         for_each_fw_domain_masked(domain, fw_domains, uncore, tmp)
1287                 fw_domain_arm_timer(domain);
1288
1289         uncore->funcs.force_wake_get(uncore, fw_domains);
1290 }
1291
1292 static inline void __force_wake_auto(struct intel_uncore *uncore,
1293                                      enum forcewake_domains fw_domains)
1294 {
1295         GEM_BUG_ON(!fw_domains);
1296
1297         /* Turn on all requested but inactive supported forcewake domains. */
1298         fw_domains &= uncore->fw_domains;
1299         fw_domains &= ~uncore->fw_domains_active;
1300
1301         if (fw_domains)
1302                 ___force_wake_auto(uncore, fw_domains);
1303 }
1304
1305 #define __gen_read(func, x) \
1306 static u##x \
1307 func##_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
1308         enum forcewake_domains fw_engine; \
1309         GEN6_READ_HEADER(x); \
1310         fw_engine = __##func##_reg_read_fw_domains(uncore, offset); \
1311         if (fw_engine) \
1312                 __force_wake_auto(uncore, fw_engine); \
1313         val = __raw_uncore_read##x(uncore, reg); \
1314         GEN6_READ_FOOTER; \
1315 }
1316
1317 #define __gen_reg_read_funcs(func) \
1318 static enum forcewake_domains \
1319 func##_reg_read_fw_domains(struct intel_uncore *uncore, i915_reg_t reg) { \
1320         return __##func##_reg_read_fw_domains(uncore, i915_mmio_reg_offset(reg)); \
1321 } \
1322 \
1323 __gen_read(func, 8) \
1324 __gen_read(func, 16) \
1325 __gen_read(func, 32) \
1326 __gen_read(func, 64)
1327
1328 __gen_reg_read_funcs(gen12_fwtable);
1329 __gen_reg_read_funcs(gen11_fwtable);
1330 __gen_reg_read_funcs(fwtable);
1331 __gen_reg_read_funcs(gen6);
1332
1333 #undef __gen_reg_read_funcs
1334 #undef GEN6_READ_FOOTER
1335 #undef GEN6_READ_HEADER
1336
1337 #define GEN2_WRITE_HEADER \
1338         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1339         assert_rpm_wakelock_held(uncore->rpm); \
1340
1341 #define GEN2_WRITE_FOOTER
1342
1343 #define __gen2_write(x) \
1344 static void \
1345 gen2_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1346         GEN2_WRITE_HEADER; \
1347         __raw_uncore_write##x(uncore, reg, val); \
1348         GEN2_WRITE_FOOTER; \
1349 }
1350
1351 #define __gen5_write(x) \
1352 static void \
1353 gen5_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1354         GEN2_WRITE_HEADER; \
1355         ilk_dummy_write(uncore); \
1356         __raw_uncore_write##x(uncore, reg, val); \
1357         GEN2_WRITE_FOOTER; \
1358 }
1359
1360 __gen5_write(8)
1361 __gen5_write(16)
1362 __gen5_write(32)
1363 __gen2_write(8)
1364 __gen2_write(16)
1365 __gen2_write(32)
1366
1367 #undef __gen5_write
1368 #undef __gen2_write
1369
1370 #undef GEN2_WRITE_FOOTER
1371 #undef GEN2_WRITE_HEADER
1372
1373 #define GEN6_WRITE_HEADER \
1374         u32 offset = i915_mmio_reg_offset(reg); \
1375         unsigned long irqflags; \
1376         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1377         assert_rpm_wakelock_held(uncore->rpm); \
1378         spin_lock_irqsave(&uncore->lock, irqflags); \
1379         unclaimed_reg_debug(uncore, reg, false, true)
1380
1381 #define GEN6_WRITE_FOOTER \
1382         unclaimed_reg_debug(uncore, reg, false, false); \
1383         spin_unlock_irqrestore(&uncore->lock, irqflags)
1384
1385 #define __gen6_write(x) \
1386 static void \
1387 gen6_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1388         GEN6_WRITE_HEADER; \
1389         if (NEEDS_FORCE_WAKE(offset)) \
1390                 __gen6_gt_wait_for_fifo(uncore); \
1391         __raw_uncore_write##x(uncore, reg, val); \
1392         GEN6_WRITE_FOOTER; \
1393 }
1394 __gen6_write(8)
1395 __gen6_write(16)
1396 __gen6_write(32)
1397
1398 #define __gen_write(func, x) \
1399 static void \
1400 func##_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1401         enum forcewake_domains fw_engine; \
1402         GEN6_WRITE_HEADER; \
1403         fw_engine = __##func##_reg_write_fw_domains(uncore, offset); \
1404         if (fw_engine) \
1405                 __force_wake_auto(uncore, fw_engine); \
1406         __raw_uncore_write##x(uncore, reg, val); \
1407         GEN6_WRITE_FOOTER; \
1408 }
1409
1410 #define __gen_reg_write_funcs(func) \
1411 static enum forcewake_domains \
1412 func##_reg_write_fw_domains(struct intel_uncore *uncore, i915_reg_t reg) { \
1413         return __##func##_reg_write_fw_domains(uncore, i915_mmio_reg_offset(reg)); \
1414 } \
1415 \
1416 __gen_write(func, 8) \
1417 __gen_write(func, 16) \
1418 __gen_write(func, 32)
1419
1420 __gen_reg_write_funcs(gen12_fwtable);
1421 __gen_reg_write_funcs(gen11_fwtable);
1422 __gen_reg_write_funcs(fwtable);
1423 __gen_reg_write_funcs(gen8);
1424
1425 #undef __gen_reg_write_funcs
1426 #undef GEN6_WRITE_FOOTER
1427 #undef GEN6_WRITE_HEADER
1428
1429 #define __vgpu_write(x) \
1430 static void \
1431 vgpu_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
1432         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
1433         __raw_uncore_write##x(uncore, reg, val); \
1434 }
1435 __vgpu_write(8)
1436 __vgpu_write(16)
1437 __vgpu_write(32)
1438
1439 #define ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, x) \
1440 do { \
1441         (uncore)->funcs.mmio_writeb = x##_write8; \
1442         (uncore)->funcs.mmio_writew = x##_write16; \
1443         (uncore)->funcs.mmio_writel = x##_write32; \
1444 } while (0)
1445
1446 #define ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, x) \
1447 do { \
1448         (uncore)->funcs.mmio_readb = x##_read8; \
1449         (uncore)->funcs.mmio_readw = x##_read16; \
1450         (uncore)->funcs.mmio_readl = x##_read32; \
1451         (uncore)->funcs.mmio_readq = x##_read64; \
1452 } while (0)
1453
1454 #define ASSIGN_WRITE_MMIO_VFUNCS(uncore, x) \
1455 do { \
1456         ASSIGN_RAW_WRITE_MMIO_VFUNCS((uncore), x); \
1457         (uncore)->funcs.write_fw_domains = x##_reg_write_fw_domains; \
1458 } while (0)
1459
1460 #define ASSIGN_READ_MMIO_VFUNCS(uncore, x) \
1461 do { \
1462         ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, x); \
1463         (uncore)->funcs.read_fw_domains = x##_reg_read_fw_domains; \
1464 } while (0)
1465
1466 static int __fw_domain_init(struct intel_uncore *uncore,
1467                             enum forcewake_domain_id domain_id,
1468                             i915_reg_t reg_set,
1469                             i915_reg_t reg_ack)
1470 {
1471         struct intel_uncore_forcewake_domain *d;
1472
1473         GEM_BUG_ON(domain_id >= FW_DOMAIN_ID_COUNT);
1474         GEM_BUG_ON(uncore->fw_domain[domain_id]);
1475
1476         if (i915_inject_probe_failure(uncore->i915))
1477                 return -ENOMEM;
1478
1479         d = kzalloc(sizeof(*d), GFP_KERNEL);
1480         if (!d)
1481                 return -ENOMEM;
1482
1483         drm_WARN_ON(&uncore->i915->drm, !i915_mmio_reg_valid(reg_set));
1484         drm_WARN_ON(&uncore->i915->drm, !i915_mmio_reg_valid(reg_ack));
1485
1486         d->uncore = uncore;
1487         d->wake_count = 0;
1488         d->reg_set = uncore->regs + i915_mmio_reg_offset(reg_set);
1489         d->reg_ack = uncore->regs + i915_mmio_reg_offset(reg_ack);
1490
1491         d->id = domain_id;
1492
1493         BUILD_BUG_ON(FORCEWAKE_RENDER != (1 << FW_DOMAIN_ID_RENDER));
1494         BUILD_BUG_ON(FORCEWAKE_BLITTER != (1 << FW_DOMAIN_ID_BLITTER));
1495         BUILD_BUG_ON(FORCEWAKE_MEDIA != (1 << FW_DOMAIN_ID_MEDIA));
1496         BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX0));
1497         BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX1));
1498         BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX2 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX2));
1499         BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX3 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX3));
1500         BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX0));
1501         BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX1));
1502
1503         d->mask = BIT(domain_id);
1504
1505         hrtimer_init(&d->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
1506         d->timer.function = intel_uncore_fw_release_timer;
1507
1508         uncore->fw_domains |= BIT(domain_id);
1509
1510         fw_domain_reset(d);
1511
1512         uncore->fw_domain[domain_id] = d;
1513
1514         return 0;
1515 }
1516
1517 static void fw_domain_fini(struct intel_uncore *uncore,
1518                            enum forcewake_domain_id domain_id)
1519 {
1520         struct intel_uncore_forcewake_domain *d;
1521
1522         GEM_BUG_ON(domain_id >= FW_DOMAIN_ID_COUNT);
1523
1524         d = fetch_and_zero(&uncore->fw_domain[domain_id]);
1525         if (!d)
1526                 return;
1527
1528         uncore->fw_domains &= ~BIT(domain_id);
1529         drm_WARN_ON(&uncore->i915->drm, d->wake_count);
1530         drm_WARN_ON(&uncore->i915->drm, hrtimer_cancel(&d->timer));
1531         kfree(d);
1532 }
1533
1534 static void intel_uncore_fw_domains_fini(struct intel_uncore *uncore)
1535 {
1536         struct intel_uncore_forcewake_domain *d;
1537         int tmp;
1538
1539         for_each_fw_domain(d, uncore, tmp)
1540                 fw_domain_fini(uncore, d->id);
1541 }
1542
1543 static int intel_uncore_fw_domains_init(struct intel_uncore *uncore)
1544 {
1545         struct drm_i915_private *i915 = uncore->i915;
1546         int ret = 0;
1547
1548         GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
1549
1550 #define fw_domain_init(uncore__, id__, set__, ack__) \
1551         (ret ?: (ret = __fw_domain_init((uncore__), (id__), (set__), (ack__))))
1552
1553         if (INTEL_GEN(i915) >= 11) {
1554                 /* we'll prune the domains of missing engines later */
1555                 intel_engine_mask_t emask = INTEL_INFO(i915)->platform_engine_mask;
1556                 int i;
1557
1558                 uncore->funcs.force_wake_get = fw_domains_get_with_fallback;
1559                 uncore->funcs.force_wake_put = fw_domains_put;
1560                 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1561                                FORCEWAKE_RENDER_GEN9,
1562                                FORCEWAKE_ACK_RENDER_GEN9);
1563                 fw_domain_init(uncore, FW_DOMAIN_ID_BLITTER,
1564                                FORCEWAKE_BLITTER_GEN9,
1565                                FORCEWAKE_ACK_BLITTER_GEN9);
1566
1567                 for (i = 0; i < I915_MAX_VCS; i++) {
1568                         if (!__HAS_ENGINE(emask, _VCS(i)))
1569                                 continue;
1570
1571                         fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA_VDBOX0 + i,
1572                                        FORCEWAKE_MEDIA_VDBOX_GEN11(i),
1573                                        FORCEWAKE_ACK_MEDIA_VDBOX_GEN11(i));
1574                 }
1575                 for (i = 0; i < I915_MAX_VECS; i++) {
1576                         if (!__HAS_ENGINE(emask, _VECS(i)))
1577                                 continue;
1578
1579                         fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA_VEBOX0 + i,
1580                                        FORCEWAKE_MEDIA_VEBOX_GEN11(i),
1581                                        FORCEWAKE_ACK_MEDIA_VEBOX_GEN11(i));
1582                 }
1583         } else if (IS_GEN_RANGE(i915, 9, 10)) {
1584                 uncore->funcs.force_wake_get = fw_domains_get_with_fallback;
1585                 uncore->funcs.force_wake_put = fw_domains_put;
1586                 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1587                                FORCEWAKE_RENDER_GEN9,
1588                                FORCEWAKE_ACK_RENDER_GEN9);
1589                 fw_domain_init(uncore, FW_DOMAIN_ID_BLITTER,
1590                                FORCEWAKE_BLITTER_GEN9,
1591                                FORCEWAKE_ACK_BLITTER_GEN9);
1592                 fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA,
1593                                FORCEWAKE_MEDIA_GEN9, FORCEWAKE_ACK_MEDIA_GEN9);
1594         } else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
1595                 uncore->funcs.force_wake_get = fw_domains_get;
1596                 uncore->funcs.force_wake_put = fw_domains_put;
1597                 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1598                                FORCEWAKE_VLV, FORCEWAKE_ACK_VLV);
1599                 fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA,
1600                                FORCEWAKE_MEDIA_VLV, FORCEWAKE_ACK_MEDIA_VLV);
1601         } else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
1602                 uncore->funcs.force_wake_get =
1603                         fw_domains_get_with_thread_status;
1604                 uncore->funcs.force_wake_put = fw_domains_put;
1605                 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1606                                FORCEWAKE_MT, FORCEWAKE_ACK_HSW);
1607         } else if (IS_IVYBRIDGE(i915)) {
1608                 u32 ecobus;
1609
1610                 /* IVB configs may use multi-threaded forcewake */
1611
1612                 /* A small trick here - if the bios hasn't configured
1613                  * MT forcewake, and if the device is in RC6, then
1614                  * force_wake_mt_get will not wake the device and the
1615                  * ECOBUS read will return zero. Which will be
1616                  * (correctly) interpreted by the test below as MT
1617                  * forcewake being disabled.
1618                  */
1619                 uncore->funcs.force_wake_get =
1620                         fw_domains_get_with_thread_status;
1621                 uncore->funcs.force_wake_put = fw_domains_put;
1622
1623                 /* We need to init first for ECOBUS access and then
1624                  * determine later if we want to reinit, in case of MT access is
1625                  * not working. In this stage we don't know which flavour this
1626                  * ivb is, so it is better to reset also the gen6 fw registers
1627                  * before the ecobus check.
1628                  */
1629
1630                 __raw_uncore_write32(uncore, FORCEWAKE, 0);
1631                 __raw_posting_read(uncore, ECOBUS);
1632
1633                 ret = __fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1634                                        FORCEWAKE_MT, FORCEWAKE_MT_ACK);
1635                 if (ret)
1636                         goto out;
1637
1638                 spin_lock_irq(&uncore->lock);
1639                 fw_domains_get_with_thread_status(uncore, FORCEWAKE_RENDER);
1640                 ecobus = __raw_uncore_read32(uncore, ECOBUS);
1641                 fw_domains_put(uncore, FORCEWAKE_RENDER);
1642                 spin_unlock_irq(&uncore->lock);
1643
1644                 if (!(ecobus & FORCEWAKE_MT_ENABLE)) {
1645                         drm_info(&i915->drm, "No MT forcewake available on Ivybridge, this can result in issues\n");
1646                         drm_info(&i915->drm, "when using vblank-synced partial screen updates.\n");
1647                         fw_domain_fini(uncore, FW_DOMAIN_ID_RENDER);
1648                         fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1649                                        FORCEWAKE, FORCEWAKE_ACK);
1650                 }
1651         } else if (IS_GEN(i915, 6)) {
1652                 uncore->funcs.force_wake_get =
1653                         fw_domains_get_with_thread_status;
1654                 uncore->funcs.force_wake_put = fw_domains_put;
1655                 fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
1656                                FORCEWAKE, FORCEWAKE_ACK);
1657         }
1658
1659 #undef fw_domain_init
1660
1661         /* All future platforms are expected to require complex power gating */
1662         drm_WARN_ON(&i915->drm, !ret && uncore->fw_domains == 0);
1663
1664 out:
1665         if (ret)
1666                 intel_uncore_fw_domains_fini(uncore);
1667
1668         return ret;
1669 }
1670
1671 #define ASSIGN_FW_DOMAINS_TABLE(uncore, d) \
1672 { \
1673         (uncore)->fw_domains_table = \
1674                         (struct intel_forcewake_range *)(d); \
1675         (uncore)->fw_domains_table_entries = ARRAY_SIZE((d)); \
1676 }
1677
1678 static int i915_pmic_bus_access_notifier(struct notifier_block *nb,
1679                                          unsigned long action, void *data)
1680 {
1681         struct intel_uncore *uncore = container_of(nb,
1682                         struct intel_uncore, pmic_bus_access_nb);
1683
1684         switch (action) {
1685         case MBI_PMIC_BUS_ACCESS_BEGIN:
1686                 /*
1687                  * forcewake all now to make sure that we don't need to do a
1688                  * forcewake later which on systems where this notifier gets
1689                  * called requires the punit to access to the shared pmic i2c
1690                  * bus, which will be busy after this notification, leading to:
1691                  * "render: timed out waiting for forcewake ack request."
1692                  * errors.
1693                  *
1694                  * The notifier is unregistered during intel_runtime_suspend(),
1695                  * so it's ok to access the HW here without holding a RPM
1696                  * wake reference -> disable wakeref asserts for the time of
1697                  * the access.
1698                  */
1699                 disable_rpm_wakeref_asserts(uncore->rpm);
1700                 intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
1701                 enable_rpm_wakeref_asserts(uncore->rpm);
1702                 break;
1703         case MBI_PMIC_BUS_ACCESS_END:
1704                 intel_uncore_forcewake_put(uncore, FORCEWAKE_ALL);
1705                 break;
1706         }
1707
1708         return NOTIFY_OK;
1709 }
1710
1711 static int uncore_mmio_setup(struct intel_uncore *uncore)
1712 {
1713         struct drm_i915_private *i915 = uncore->i915;
1714         struct pci_dev *pdev = i915->drm.pdev;
1715         int mmio_bar;
1716         int mmio_size;
1717
1718         mmio_bar = IS_GEN(i915, 2) ? 1 : 0;
1719         /*
1720          * Before gen4, the registers and the GTT are behind different BARs.
1721          * However, from gen4 onwards, the registers and the GTT are shared
1722          * in the same BAR, so we want to restrict this ioremap from
1723          * clobbering the GTT which we want ioremap_wc instead. Fortunately,
1724          * the register BAR remains the same size for all the earlier
1725          * generations up to Ironlake.
1726          */
1727         if (INTEL_GEN(i915) < 5)
1728                 mmio_size = 512 * 1024;
1729         else
1730                 mmio_size = 2 * 1024 * 1024;
1731         uncore->regs = pci_iomap(pdev, mmio_bar, mmio_size);
1732         if (uncore->regs == NULL) {
1733                 drm_err(&i915->drm, "failed to map registers\n");
1734                 return -EIO;
1735         }
1736
1737         return 0;
1738 }
1739
1740 static void uncore_mmio_cleanup(struct intel_uncore *uncore)
1741 {
1742         struct pci_dev *pdev = uncore->i915->drm.pdev;
1743
1744         pci_iounmap(pdev, uncore->regs);
1745 }
1746
1747 void intel_uncore_init_early(struct intel_uncore *uncore,
1748                              struct drm_i915_private *i915)
1749 {
1750         spin_lock_init(&uncore->lock);
1751         uncore->i915 = i915;
1752         uncore->rpm = &i915->runtime_pm;
1753         uncore->debug = &i915->mmio_debug;
1754 }
1755
1756 static void uncore_raw_init(struct intel_uncore *uncore)
1757 {
1758         GEM_BUG_ON(intel_uncore_has_forcewake(uncore));
1759
1760         if (intel_vgpu_active(uncore->i915)) {
1761                 ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, vgpu);
1762                 ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, vgpu);
1763         } else if (IS_GEN(uncore->i915, 5)) {
1764                 ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, gen5);
1765                 ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, gen5);
1766         } else {
1767                 ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, gen2);
1768                 ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, gen2);
1769         }
1770 }
1771
1772 static int uncore_forcewake_init(struct intel_uncore *uncore)
1773 {
1774         struct drm_i915_private *i915 = uncore->i915;
1775         int ret;
1776
1777         GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
1778
1779         ret = intel_uncore_fw_domains_init(uncore);
1780         if (ret)
1781                 return ret;
1782         forcewake_early_sanitize(uncore, 0);
1783
1784         if (IS_GEN_RANGE(i915, 6, 7)) {
1785                 ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen6);
1786
1787                 if (IS_VALLEYVIEW(i915)) {
1788                         ASSIGN_FW_DOMAINS_TABLE(uncore, __vlv_fw_ranges);
1789                         ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
1790                 } else {
1791                         ASSIGN_READ_MMIO_VFUNCS(uncore, gen6);
1792                 }
1793         } else if (IS_GEN(i915, 8)) {
1794                 if (IS_CHERRYVIEW(i915)) {
1795                         ASSIGN_FW_DOMAINS_TABLE(uncore, __chv_fw_ranges);
1796                         ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
1797                         ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
1798                 } else {
1799                         ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen8);
1800                         ASSIGN_READ_MMIO_VFUNCS(uncore, gen6);
1801                 }
1802         } else if (IS_GEN_RANGE(i915, 9, 10)) {
1803                 ASSIGN_FW_DOMAINS_TABLE(uncore, __gen9_fw_ranges);
1804                 ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
1805                 ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
1806         } else if (IS_GEN(i915, 11)) {
1807                 ASSIGN_FW_DOMAINS_TABLE(uncore, __gen11_fw_ranges);
1808                 ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen11_fwtable);
1809                 ASSIGN_READ_MMIO_VFUNCS(uncore, gen11_fwtable);
1810         } else {
1811                 ASSIGN_FW_DOMAINS_TABLE(uncore, __gen12_fw_ranges);
1812                 ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen12_fwtable);
1813                 ASSIGN_READ_MMIO_VFUNCS(uncore, gen12_fwtable);
1814         }
1815
1816         uncore->pmic_bus_access_nb.notifier_call = i915_pmic_bus_access_notifier;
1817         iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
1818
1819         return 0;
1820 }
1821
1822 int intel_uncore_init_mmio(struct intel_uncore *uncore)
1823 {
1824         struct drm_i915_private *i915 = uncore->i915;
1825         int ret;
1826
1827         ret = uncore_mmio_setup(uncore);
1828         if (ret)
1829                 return ret;
1830
1831         if (INTEL_GEN(i915) > 5 && !intel_vgpu_active(i915))
1832                 uncore->flags |= UNCORE_HAS_FORCEWAKE;
1833
1834         if (!intel_uncore_has_forcewake(uncore)) {
1835                 uncore_raw_init(uncore);
1836         } else {
1837                 ret = uncore_forcewake_init(uncore);
1838                 if (ret)
1839                         goto out_mmio_cleanup;
1840         }
1841
1842         /* make sure fw funcs are set if and only if we have fw*/
1843         GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.force_wake_get);
1844         GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.force_wake_put);
1845         GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.read_fw_domains);
1846         GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.write_fw_domains);
1847
1848         if (HAS_FPGA_DBG_UNCLAIMED(i915))
1849                 uncore->flags |= UNCORE_HAS_FPGA_DBG_UNCLAIMED;
1850
1851         if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
1852                 uncore->flags |= UNCORE_HAS_DBG_UNCLAIMED;
1853
1854         if (IS_GEN_RANGE(i915, 6, 7))
1855                 uncore->flags |= UNCORE_HAS_FIFO;
1856
1857         /* clear out unclaimed reg detection bit */
1858         if (intel_uncore_unclaimed_mmio(uncore))
1859                 drm_dbg(&i915->drm, "unclaimed mmio detected on uncore init, clearing\n");
1860
1861         return 0;
1862
1863 out_mmio_cleanup:
1864         uncore_mmio_cleanup(uncore);
1865
1866         return ret;
1867 }
1868
1869 /*
1870  * We might have detected that some engines are fused off after we initialized
1871  * the forcewake domains. Prune them, to make sure they only reference existing
1872  * engines.
1873  */
1874 void intel_uncore_prune_engine_fw_domains(struct intel_uncore *uncore,
1875                                           struct intel_gt *gt)
1876 {
1877         enum forcewake_domains fw_domains = uncore->fw_domains;
1878         enum forcewake_domain_id domain_id;
1879         int i;
1880
1881         if (!intel_uncore_has_forcewake(uncore) || INTEL_GEN(uncore->i915) < 11)
1882                 return;
1883
1884         for (i = 0; i < I915_MAX_VCS; i++) {
1885                 domain_id = FW_DOMAIN_ID_MEDIA_VDBOX0 + i;
1886
1887                 if (HAS_ENGINE(gt, _VCS(i)))
1888                         continue;
1889
1890                 if (fw_domains & BIT(domain_id))
1891                         fw_domain_fini(uncore, domain_id);
1892         }
1893
1894         for (i = 0; i < I915_MAX_VECS; i++) {
1895                 domain_id = FW_DOMAIN_ID_MEDIA_VEBOX0 + i;
1896
1897                 if (HAS_ENGINE(gt, _VECS(i)))
1898                         continue;
1899
1900                 if (fw_domains & BIT(domain_id))
1901                         fw_domain_fini(uncore, domain_id);
1902         }
1903 }
1904
1905 void intel_uncore_fini_mmio(struct intel_uncore *uncore)
1906 {
1907         if (intel_uncore_has_forcewake(uncore)) {
1908                 iosf_mbi_punit_acquire();
1909                 iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
1910                         &uncore->pmic_bus_access_nb);
1911                 intel_uncore_forcewake_reset(uncore);
1912                 intel_uncore_fw_domains_fini(uncore);
1913                 iosf_mbi_punit_release();
1914         }
1915
1916         uncore_mmio_cleanup(uncore);
1917 }
1918
1919 static const struct reg_whitelist {
1920         i915_reg_t offset_ldw;
1921         i915_reg_t offset_udw;
1922         u16 gen_mask;
1923         u8 size;
1924 } reg_read_whitelist[] = { {
1925         .offset_ldw = RING_TIMESTAMP(RENDER_RING_BASE),
1926         .offset_udw = RING_TIMESTAMP_UDW(RENDER_RING_BASE),
1927         .gen_mask = INTEL_GEN_MASK(4, 12),
1928         .size = 8
1929 } };
1930
1931 int i915_reg_read_ioctl(struct drm_device *dev,
1932                         void *data, struct drm_file *file)
1933 {
1934         struct drm_i915_private *i915 = to_i915(dev);
1935         struct intel_uncore *uncore = &i915->uncore;
1936         struct drm_i915_reg_read *reg = data;
1937         struct reg_whitelist const *entry;
1938         intel_wakeref_t wakeref;
1939         unsigned int flags;
1940         int remain;
1941         int ret = 0;
1942
1943         entry = reg_read_whitelist;
1944         remain = ARRAY_SIZE(reg_read_whitelist);
1945         while (remain) {
1946                 u32 entry_offset = i915_mmio_reg_offset(entry->offset_ldw);
1947
1948                 GEM_BUG_ON(!is_power_of_2(entry->size));
1949                 GEM_BUG_ON(entry->size > 8);
1950                 GEM_BUG_ON(entry_offset & (entry->size - 1));
1951
1952                 if (INTEL_INFO(i915)->gen_mask & entry->gen_mask &&
1953                     entry_offset == (reg->offset & -entry->size))
1954                         break;
1955                 entry++;
1956                 remain--;
1957         }
1958
1959         if (!remain)
1960                 return -EINVAL;
1961
1962         flags = reg->offset & (entry->size - 1);
1963
1964         with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
1965                 if (entry->size == 8 && flags == I915_REG_READ_8B_WA)
1966                         reg->val = intel_uncore_read64_2x32(uncore,
1967                                                             entry->offset_ldw,
1968                                                             entry->offset_udw);
1969                 else if (entry->size == 8 && flags == 0)
1970                         reg->val = intel_uncore_read64(uncore,
1971                                                        entry->offset_ldw);
1972                 else if (entry->size == 4 && flags == 0)
1973                         reg->val = intel_uncore_read(uncore, entry->offset_ldw);
1974                 else if (entry->size == 2 && flags == 0)
1975                         reg->val = intel_uncore_read16(uncore,
1976                                                        entry->offset_ldw);
1977                 else if (entry->size == 1 && flags == 0)
1978                         reg->val = intel_uncore_read8(uncore,
1979                                                       entry->offset_ldw);
1980                 else
1981                         ret = -EINVAL;
1982         }
1983
1984         return ret;
1985 }
1986
1987 /**
1988  * __intel_wait_for_register_fw - wait until register matches expected state
1989  * @uncore: the struct intel_uncore
1990  * @reg: the register to read
1991  * @mask: mask to apply to register value
1992  * @value: expected value
1993  * @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
1994  * @slow_timeout_ms: slow timeout in millisecond
1995  * @out_value: optional placeholder to hold registry value
1996  *
1997  * This routine waits until the target register @reg contains the expected
1998  * @value after applying the @mask, i.e. it waits until ::
1999  *
2000  *     (I915_READ_FW(reg) & mask) == value
2001  *
2002  * Otherwise, the wait will timeout after @slow_timeout_ms milliseconds.
2003  * For atomic context @slow_timeout_ms must be zero and @fast_timeout_us
2004  * must be not larger than 20,0000 microseconds.
2005  *
2006  * Note that this routine assumes the caller holds forcewake asserted, it is
2007  * not suitable for very long waits. See intel_wait_for_register() if you
2008  * wish to wait without holding forcewake for the duration (i.e. you expect
2009  * the wait to be slow).
2010  *
2011  * Return: 0 if the register matches the desired condition, or -ETIMEDOUT.
2012  */
2013 int __intel_wait_for_register_fw(struct intel_uncore *uncore,
2014                                  i915_reg_t reg,
2015                                  u32 mask,
2016                                  u32 value,
2017                                  unsigned int fast_timeout_us,
2018                                  unsigned int slow_timeout_ms,
2019                                  u32 *out_value)
2020 {
2021         u32 reg_value = 0;
2022 #define done (((reg_value = intel_uncore_read_fw(uncore, reg)) & mask) == value)
2023         int ret;
2024
2025         /* Catch any overuse of this function */
2026         might_sleep_if(slow_timeout_ms);
2027         GEM_BUG_ON(fast_timeout_us > 20000);
2028         GEM_BUG_ON(!fast_timeout_us && !slow_timeout_ms);
2029
2030         ret = -ETIMEDOUT;
2031         if (fast_timeout_us && fast_timeout_us <= 20000)
2032                 ret = _wait_for_atomic(done, fast_timeout_us, 0);
2033         if (ret && slow_timeout_ms)
2034                 ret = wait_for(done, slow_timeout_ms);
2035
2036         if (out_value)
2037                 *out_value = reg_value;
2038
2039         return ret;
2040 #undef done
2041 }
2042
2043 /**
2044  * __intel_wait_for_register - wait until register matches expected state
2045  * @uncore: the struct intel_uncore
2046  * @reg: the register to read
2047  * @mask: mask to apply to register value
2048  * @value: expected value
2049  * @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
2050  * @slow_timeout_ms: slow timeout in millisecond
2051  * @out_value: optional placeholder to hold registry value
2052  *
2053  * This routine waits until the target register @reg contains the expected
2054  * @value after applying the @mask, i.e. it waits until ::
2055  *
2056  *     (I915_READ(reg) & mask) == value
2057  *
2058  * Otherwise, the wait will timeout after @timeout_ms milliseconds.
2059  *
2060  * Return: 0 if the register matches the desired condition, or -ETIMEDOUT.
2061  */
2062 int __intel_wait_for_register(struct intel_uncore *uncore,
2063                               i915_reg_t reg,
2064                               u32 mask,
2065                               u32 value,
2066                               unsigned int fast_timeout_us,
2067                               unsigned int slow_timeout_ms,
2068                               u32 *out_value)
2069 {
2070         unsigned fw =
2071                 intel_uncore_forcewake_for_reg(uncore, reg, FW_REG_READ);
2072         u32 reg_value;
2073         int ret;
2074
2075         might_sleep_if(slow_timeout_ms);
2076
2077         spin_lock_irq(&uncore->lock);
2078         intel_uncore_forcewake_get__locked(uncore, fw);
2079
2080         ret = __intel_wait_for_register_fw(uncore,
2081                                            reg, mask, value,
2082                                            fast_timeout_us, 0, &reg_value);
2083
2084         intel_uncore_forcewake_put__locked(uncore, fw);
2085         spin_unlock_irq(&uncore->lock);
2086
2087         if (ret && slow_timeout_ms)
2088                 ret = __wait_for(reg_value = intel_uncore_read_notrace(uncore,
2089                                                                        reg),
2090                                  (reg_value & mask) == value,
2091                                  slow_timeout_ms * 1000, 10, 1000);
2092
2093         /* just trace the final value */
2094         trace_i915_reg_rw(false, reg, reg_value, sizeof(reg_value), true);
2095
2096         if (out_value)
2097                 *out_value = reg_value;
2098
2099         return ret;
2100 }
2101
2102 bool intel_uncore_unclaimed_mmio(struct intel_uncore *uncore)
2103 {
2104         bool ret;
2105
2106         spin_lock_irq(&uncore->debug->lock);
2107         ret = check_for_unclaimed_mmio(uncore);
2108         spin_unlock_irq(&uncore->debug->lock);
2109
2110         return ret;
2111 }
2112
2113 bool
2114 intel_uncore_arm_unclaimed_mmio_detection(struct intel_uncore *uncore)
2115 {
2116         bool ret = false;
2117
2118         spin_lock_irq(&uncore->debug->lock);
2119
2120         if (unlikely(uncore->debug->unclaimed_mmio_check <= 0))
2121                 goto out;
2122
2123         if (unlikely(check_for_unclaimed_mmio(uncore))) {
2124                 if (!uncore->i915->params.mmio_debug) {
2125                         drm_dbg(&uncore->i915->drm,
2126                                 "Unclaimed register detected, "
2127                                 "enabling oneshot unclaimed register reporting. "
2128                                 "Please use i915.mmio_debug=N for more information.\n");
2129                         uncore->i915->params.mmio_debug++;
2130                 }
2131                 uncore->debug->unclaimed_mmio_check--;
2132                 ret = true;
2133         }
2134
2135 out:
2136         spin_unlock_irq(&uncore->debug->lock);
2137
2138         return ret;
2139 }
2140
2141 /**
2142  * intel_uncore_forcewake_for_reg - which forcewake domains are needed to access
2143  *                                  a register
2144  * @uncore: pointer to struct intel_uncore
2145  * @reg: register in question
2146  * @op: operation bitmask of FW_REG_READ and/or FW_REG_WRITE
2147  *
2148  * Returns a set of forcewake domains required to be taken with for example
2149  * intel_uncore_forcewake_get for the specified register to be accessible in the
2150  * specified mode (read, write or read/write) with raw mmio accessors.
2151  *
2152  * NOTE: On Gen6 and Gen7 write forcewake domain (FORCEWAKE_RENDER) requires the
2153  * callers to do FIFO management on their own or risk losing writes.
2154  */
2155 enum forcewake_domains
2156 intel_uncore_forcewake_for_reg(struct intel_uncore *uncore,
2157                                i915_reg_t reg, unsigned int op)
2158 {
2159         enum forcewake_domains fw_domains = 0;
2160
2161         drm_WARN_ON(&uncore->i915->drm, !op);
2162
2163         if (!intel_uncore_has_forcewake(uncore))
2164                 return 0;
2165
2166         if (op & FW_REG_READ)
2167                 fw_domains = uncore->funcs.read_fw_domains(uncore, reg);
2168
2169         if (op & FW_REG_WRITE)
2170                 fw_domains |= uncore->funcs.write_fw_domains(uncore, reg);
2171
2172         drm_WARN_ON(&uncore->i915->drm, fw_domains & ~uncore->fw_domains);
2173
2174         return fw_domains;
2175 }
2176
2177 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
2178 #include "selftests/mock_uncore.c"
2179 #include "selftests/intel_uncore.c"
2180 #endif