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
  27 #define FORCEWAKE_ACK_TIMEOUT_MS 2
  28
  29 #define __raw_i915_read8(dev_priv__, reg__) readb((dev_priv__)->regs + (reg__))
  30 #define __raw_i915_write8(dev_priv__, reg__, val__) writeb(val__, (dev_priv__)->regs + (reg__))
  31
  32 #define __raw_i915_read16(dev_priv__, reg__) readw((dev_priv__)->regs + (reg__))
  33 #define __raw_i915_write16(dev_priv__, reg__, val__) writew(val__, (dev_priv__)->regs + (reg__))
  34
  35 #define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
  36 #define __raw_i915_write32(dev_priv__, reg__, val__) writel(val__, (dev_priv__)->regs + (reg__))
  37
  38 #define __raw_i915_read64(dev_priv__, reg__) readq((dev_priv__)->regs + (reg__))
  39 #define __raw_i915_write64(dev_priv__, reg__, val__) writeq(val__, (dev_priv__)->regs + (reg__))
  40
  41 #define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32(dev_priv__, reg__)
  42
  43 static void
  44 assert_device_not_suspended(struct drm_i915_private *dev_priv)
  45 {
  46         WARN_ONCE(HAS_RUNTIME_PM(dev_priv->dev) && dev_priv->pm.suspended,
  47                   "Device suspended\n");
  48 }
  49
  50 static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
  51 {
  52         /* w/a for a sporadic read returning 0 by waiting for the GT
  53          * thread to wake up.
  54          */
  55         if (wait_for_atomic_us((__raw_i915_read32(dev_priv, GEN6_GT_THREAD_STATUS_REG) &
  56                                 GEN6_GT_THREAD_STATUS_CORE_MASK) == 0, 500))
  57                 DRM_ERROR("GT thread status wait timed out\n");
  58 }
  59
  60 static void __gen6_gt_force_wake_reset(struct drm_i915_private *dev_priv)
  61 {
  62         __raw_i915_write32(dev_priv, FORCEWAKE, 0);
  63         /* something from same cacheline, but !FORCEWAKE */
  64         __raw_posting_read(dev_priv, ECOBUS);
  65 }
  66
  67 static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv,
  68                                                         int fw_engine)
  69 {
  70         if (wait_for_atomic((__raw_i915_read32(dev_priv, FORCEWAKE_ACK) & 1) == 0,
  71                             FORCEWAKE_ACK_TIMEOUT_MS))
  72                 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
  73
  74         __raw_i915_write32(dev_priv, FORCEWAKE, 1);
  75         /* something from same cacheline, but !FORCEWAKE */
  76         __raw_posting_read(dev_priv, ECOBUS);
  77
  78         if (wait_for_atomic((__raw_i915_read32(dev_priv, FORCEWAKE_ACK) & 1),
  79                             FORCEWAKE_ACK_TIMEOUT_MS))
  80                 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
  81
  82         /* WaRsForcewakeWaitTC0:snb */
  83         __gen6_gt_wait_for_thread_c0(dev_priv);
  84 }
  85
  86 static void __gen7_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv)
  87 {
  88         __raw_i915_write32(dev_priv, FORCEWAKE_MT, _MASKED_BIT_DISABLE(0xffff));
  89         /* something from same cacheline, but !FORCEWAKE_MT */
  90         __raw_posting_read(dev_priv, ECOBUS);
  91 }
  92
  93 static void __gen7_gt_force_wake_mt_get(struct drm_i915_private *dev_priv,
  94                                                         int fw_engine)
  95 {
  96         u32 forcewake_ack;
  97
  98         if (IS_HASWELL(dev_priv->dev) || IS_BROADWELL(dev_priv->dev))
  99                 forcewake_ack = FORCEWAKE_ACK_HSW;
 100         else
 101                 forcewake_ack = FORCEWAKE_MT_ACK;
 102
 103         if (wait_for_atomic((__raw_i915_read32(dev_priv, forcewake_ack) & FORCEWAKE_KERNEL) == 0,
 104                             FORCEWAKE_ACK_TIMEOUT_MS))
 105                 DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
 106
 107         __raw_i915_write32(dev_priv, FORCEWAKE_MT,
 108                            _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
 109         /* something from same cacheline, but !FORCEWAKE_MT */
 110         __raw_posting_read(dev_priv, ECOBUS);
 111
 112         if (wait_for_atomic((__raw_i915_read32(dev_priv, forcewake_ack) & FORCEWAKE_KERNEL),
 113                             FORCEWAKE_ACK_TIMEOUT_MS))
 114                 DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
 115
 116         /* WaRsForcewakeWaitTC0:ivb,hsw */
 117         __gen6_gt_wait_for_thread_c0(dev_priv);
 118 }
 119
 120 static void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
 121 {
 122         u32 gtfifodbg;
 123
 124         gtfifodbg = __raw_i915_read32(dev_priv, GTFIFODBG);
 125         if (WARN(gtfifodbg, "GT wake FIFO error 0x%x\n", gtfifodbg))
 126                 __raw_i915_write32(dev_priv, GTFIFODBG, gtfifodbg);
 127 }
 128
 129 static void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv,
 130                                                         int fw_engine)
 131 {
 132         __raw_i915_write32(dev_priv, FORCEWAKE, 0);
 133         /* something from same cacheline, but !FORCEWAKE */
 134         __raw_posting_read(dev_priv, ECOBUS);
 135         gen6_gt_check_fifodbg(dev_priv);
 136 }
 137
 138 static void __gen7_gt_force_wake_mt_put(struct drm_i915_private *dev_priv,
 139                                                         int fw_engine)
 140 {
 141         __raw_i915_write32(dev_priv, FORCEWAKE_MT,
 142                            _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
 143         /* something from same cacheline, but !FORCEWAKE_MT */
 144         __raw_posting_read(dev_priv, ECOBUS);
 145
 146         if (IS_GEN7(dev_priv->dev))
 147                 gen6_gt_check_fifodbg(dev_priv);
 148 }
 149
 150 static int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
 151 {
 152         int ret = 0;
 153
 154         /* On VLV, FIFO will be shared by both SW and HW.
 155          * So, we need to read the FREE_ENTRIES everytime */
 156         if (IS_VALLEYVIEW(dev_priv->dev))
 157                 dev_priv->uncore.fifo_count =
 158                         __raw_i915_read32(dev_priv, GTFIFOCTL) &
 159                                                 GT_FIFO_FREE_ENTRIES_MASK;
 160
 161         if (dev_priv->uncore.fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {
 162                 int loop = 500;
 163                 u32 fifo = __raw_i915_read32(dev_priv, GTFIFOCTL) & GT_FIFO_FREE_ENTRIES_MASK;
 164                 while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
 165                         udelay(10);
 166                         fifo = __raw_i915_read32(dev_priv, GTFIFOCTL) & GT_FIFO_FREE_ENTRIES_MASK;
 167                 }
 168                 if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES))
 169                         ++ret;
 170                 dev_priv->uncore.fifo_count = fifo;
 171         }
 172         dev_priv->uncore.fifo_count--;
 173
 174         return ret;
 175 }
 176
 177 static void vlv_force_wake_reset(struct drm_i915_private *dev_priv)
 178 {
 179         __raw_i915_write32(dev_priv, FORCEWAKE_VLV,
 180                            _MASKED_BIT_DISABLE(0xffff));
 181         __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_VLV,
 182                            _MASKED_BIT_DISABLE(0xffff));
 183         /* something from same cacheline, but !FORCEWAKE_VLV */
 184         __raw_posting_read(dev_priv, FORCEWAKE_ACK_VLV);
 185 }
 186
 187 static void __vlv_force_wake_get(struct drm_i915_private *dev_priv,
 188                                                 int fw_engine)
 189 {
 190         /* Check for Render Engine */
 191         if (FORCEWAKE_RENDER & fw_engine) {
 192                 if (wait_for_atomic((__raw_i915_read32(dev_priv,
 193                                                 FORCEWAKE_ACK_VLV) &
 194                                                 FORCEWAKE_KERNEL) == 0,
 195                                         FORCEWAKE_ACK_TIMEOUT_MS))
 196                         DRM_ERROR("Timed out: Render forcewake old ack to clear.\n");
 197
 198                 __raw_i915_write32(dev_priv, FORCEWAKE_VLV,
 199                                    _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
 200
 201                 if (wait_for_atomic((__raw_i915_read32(dev_priv,
 202                                                 FORCEWAKE_ACK_VLV) &
 203                                                 FORCEWAKE_KERNEL),
 204                                         FORCEWAKE_ACK_TIMEOUT_MS))
 205                         DRM_ERROR("Timed out: waiting for Render to ack.\n");
 206         }
 207
 208         /* Check for Media Engine */
 209         if (FORCEWAKE_MEDIA & fw_engine) {
 210                 if (wait_for_atomic((__raw_i915_read32(dev_priv,
 211                                                 FORCEWAKE_ACK_MEDIA_VLV) &
 212                                                 FORCEWAKE_KERNEL) == 0,
 213                                         FORCEWAKE_ACK_TIMEOUT_MS))
 214                         DRM_ERROR("Timed out: Media forcewake old ack to clear.\n");
 215
 216                 __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_VLV,
 217                                    _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
 218
 219                 if (wait_for_atomic((__raw_i915_read32(dev_priv,
 220                                                 FORCEWAKE_ACK_MEDIA_VLV) &
 221                                                 FORCEWAKE_KERNEL),
 222                                         FORCEWAKE_ACK_TIMEOUT_MS))
 223                         DRM_ERROR("Timed out: waiting for media to ack.\n");
 224         }
 225 }
 226
 227 static void __vlv_force_wake_put(struct drm_i915_private *dev_priv,
 228                                         int fw_engine)
 229 {
 230
 231         /* Check for Render Engine */
 232         if (FORCEWAKE_RENDER & fw_engine)
 233                 __raw_i915_write32(dev_priv, FORCEWAKE_VLV,
 234                                         _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
 235
 236
 237         /* Check for Media Engine */
 238         if (FORCEWAKE_MEDIA & fw_engine)
 239                 __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_VLV,
 240                                 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
 241
 242         /* something from same cacheline, but !FORCEWAKE_VLV */
 243         __raw_posting_read(dev_priv, FORCEWAKE_ACK_VLV);
 244         if (!IS_CHERRYVIEW(dev_priv->dev))
 245                 gen6_gt_check_fifodbg(dev_priv);
 246 }
 247
 248 static void vlv_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)
 249 {
 250         unsigned long irqflags;
 251
 252         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 253
 254         if (fw_engine & FORCEWAKE_RENDER &&
 255             dev_priv->uncore.fw_rendercount++ != 0)
 256                 fw_engine &= ~FORCEWAKE_RENDER;
 257         if (fw_engine & FORCEWAKE_MEDIA &&
 258             dev_priv->uncore.fw_mediacount++ != 0)
 259                 fw_engine &= ~FORCEWAKE_MEDIA;
 260
 261         if (fw_engine)
 262                 dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_engine);
 263
 264         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 265 }
 266
 267 static void vlv_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
 268 {
 269         unsigned long irqflags;
 270
 271         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 272
 273         if (fw_engine & FORCEWAKE_RENDER) {
 274                 WARN_ON(!dev_priv->uncore.fw_rendercount);
 275                 if (--dev_priv->uncore.fw_rendercount != 0)
 276                         fw_engine &= ~FORCEWAKE_RENDER;
 277         }
 278
 279         if (fw_engine & FORCEWAKE_MEDIA) {
 280                 WARN_ON(!dev_priv->uncore.fw_mediacount);
 281                 if (--dev_priv->uncore.fw_mediacount != 0)
 282                         fw_engine &= ~FORCEWAKE_MEDIA;
 283         }
 284
 285         if (fw_engine)
 286                 dev_priv->uncore.funcs.force_wake_put(dev_priv, fw_engine);
 287
 288         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 289 }
 290
 291 static void __gen9_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv)
 292 {
 293         __raw_i915_write32(dev_priv, FORCEWAKE_RENDER_GEN9,
 294                         _MASKED_BIT_DISABLE(0xffff));
 295
 296         __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_GEN9,
 297                         _MASKED_BIT_DISABLE(0xffff));
 298
 299         __raw_i915_write32(dev_priv, FORCEWAKE_BLITTER_GEN9,
 300                         _MASKED_BIT_DISABLE(0xffff));
 301 }
 302
 303 static void
 304 __gen9_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)
 305 {
 306         /* Check for Render Engine */
 307         if (FORCEWAKE_RENDER & fw_engine) {
 308                 if (wait_for_atomic((__raw_i915_read32(dev_priv,
 309                                                 FORCEWAKE_ACK_RENDER_GEN9) &
 310                                                 FORCEWAKE_KERNEL) == 0,
 311                                         FORCEWAKE_ACK_TIMEOUT_MS))
 312                         DRM_ERROR("Timed out: Render forcewake old ack to clear.\n");
 313
 314                 __raw_i915_write32(dev_priv, FORCEWAKE_RENDER_GEN9,
 315                                    _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
 316
 317                 if (wait_for_atomic((__raw_i915_read32(dev_priv,
 318                                                 FORCEWAKE_ACK_RENDER_GEN9) &
 319                                                 FORCEWAKE_KERNEL),
 320                                         FORCEWAKE_ACK_TIMEOUT_MS))
 321                         DRM_ERROR("Timed out: waiting for Render to ack.\n");
 322         }
 323
 324         /* Check for Media Engine */
 325         if (FORCEWAKE_MEDIA & fw_engine) {
 326                 if (wait_for_atomic((__raw_i915_read32(dev_priv,
 327                                                 FORCEWAKE_ACK_MEDIA_GEN9) &
 328                                                 FORCEWAKE_KERNEL) == 0,
 329                                         FORCEWAKE_ACK_TIMEOUT_MS))
 330                         DRM_ERROR("Timed out: Media forcewake old ack to clear.\n");
 331
 332                 __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_GEN9,
 333                                    _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
 334
 335                 if (wait_for_atomic((__raw_i915_read32(dev_priv,
 336                                                 FORCEWAKE_ACK_MEDIA_GEN9) &
 337                                                 FORCEWAKE_KERNEL),
 338                                         FORCEWAKE_ACK_TIMEOUT_MS))
 339                         DRM_ERROR("Timed out: waiting for Media to ack.\n");
 340         }
 341
 342         /* Check for Blitter Engine */
 343         if (FORCEWAKE_BLITTER & fw_engine) {
 344                 if (wait_for_atomic((__raw_i915_read32(dev_priv,
 345                                                 FORCEWAKE_ACK_BLITTER_GEN9) &
 346                                                 FORCEWAKE_KERNEL) == 0,
 347                                         FORCEWAKE_ACK_TIMEOUT_MS))
 348                         DRM_ERROR("Timed out: Blitter forcewake old ack to clear.\n");
 349
 350                 __raw_i915_write32(dev_priv, FORCEWAKE_BLITTER_GEN9,
 351                                    _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
 352
 353                 if (wait_for_atomic((__raw_i915_read32(dev_priv,
 354                                                 FORCEWAKE_ACK_BLITTER_GEN9) &
 355                                                 FORCEWAKE_KERNEL),
 356                                         FORCEWAKE_ACK_TIMEOUT_MS))
 357                         DRM_ERROR("Timed out: waiting for Blitter to ack.\n");
 358         }
 359 }
 360
 361 static void
 362 __gen9_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
 363 {
 364         /* Check for Render Engine */
 365         if (FORCEWAKE_RENDER & fw_engine)
 366                 __raw_i915_write32(dev_priv, FORCEWAKE_RENDER_GEN9,
 367                                 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
 368
 369         /* Check for Media Engine */
 370         if (FORCEWAKE_MEDIA & fw_engine)
 371                 __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_GEN9,
 372                                 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
 373
 374         /* Check for Blitter Engine */
 375         if (FORCEWAKE_BLITTER & fw_engine)
 376                 __raw_i915_write32(dev_priv, FORCEWAKE_BLITTER_GEN9,
 377                                 _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
 378 }
 379
 380 static void
 381 gen9_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)
 382 {
 383         unsigned long irqflags;
 384
 385         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 386
 387         if (FORCEWAKE_RENDER & fw_engine) {
 388                 if (dev_priv->uncore.fw_rendercount++ == 0)
 389                         dev_priv->uncore.funcs.force_wake_get(dev_priv,
 390                                                         FORCEWAKE_RENDER);
 391         }
 392
 393         if (FORCEWAKE_MEDIA & fw_engine) {
 394                 if (dev_priv->uncore.fw_mediacount++ == 0)
 395                         dev_priv->uncore.funcs.force_wake_get(dev_priv,
 396                                                         FORCEWAKE_MEDIA);
 397         }
 398
 399         if (FORCEWAKE_BLITTER & fw_engine) {
 400                 if (dev_priv->uncore.fw_blittercount++ == 0)
 401                         dev_priv->uncore.funcs.force_wake_get(dev_priv,
 402                                                         FORCEWAKE_BLITTER);
 403         }
 404
 405         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 406 }
 407
 408 static void
 409 gen9_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
 410 {
 411         unsigned long irqflags;
 412
 413         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 414
 415         if (FORCEWAKE_RENDER & fw_engine) {
 416                 WARN_ON(dev_priv->uncore.fw_rendercount == 0);
 417                 if (--dev_priv->uncore.fw_rendercount == 0)
 418                         dev_priv->uncore.funcs.force_wake_put(dev_priv,
 419                                                         FORCEWAKE_RENDER);
 420         }
 421
 422         if (FORCEWAKE_MEDIA & fw_engine) {
 423                 WARN_ON(dev_priv->uncore.fw_mediacount == 0);
 424                 if (--dev_priv->uncore.fw_mediacount == 0)
 425                         dev_priv->uncore.funcs.force_wake_put(dev_priv,
 426                                                         FORCEWAKE_MEDIA);
 427         }
 428
 429         if (FORCEWAKE_BLITTER & fw_engine) {
 430                 WARN_ON(dev_priv->uncore.fw_blittercount == 0);
 431                 if (--dev_priv->uncore.fw_blittercount == 0)
 432                         dev_priv->uncore.funcs.force_wake_put(dev_priv,
 433                                                         FORCEWAKE_BLITTER);
 434         }
 435
 436         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 437 }
 438
 439 static void gen6_force_wake_timer(unsigned long arg)
 440 {
 441         struct drm_i915_private *dev_priv = (void *)arg;
 442         unsigned long irqflags;
 443
 444         assert_device_not_suspended(dev_priv);
 445
 446         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 447         WARN_ON(!dev_priv->uncore.forcewake_count);
 448
 449         if (--dev_priv->uncore.forcewake_count == 0)
 450                 dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_ALL);
 451         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 452
 453         intel_runtime_pm_put(dev_priv);
 454 }
 455
 456 void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
 457 {
 458         struct drm_i915_private *dev_priv = dev->dev_private;
 459         unsigned long irqflags;
 460
 461         if (del_timer_sync(&dev_priv->uncore.force_wake_timer))
 462                 gen6_force_wake_timer((unsigned long)dev_priv);
 463
 464         /* Hold uncore.lock across reset to prevent any register access
 465          * with forcewake not set correctly
 466          */
 467         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 468
 469         if (IS_VALLEYVIEW(dev))
 470                 vlv_force_wake_reset(dev_priv);
 471         else if (IS_GEN6(dev) || IS_GEN7(dev))
 472                 __gen6_gt_force_wake_reset(dev_priv);
 473
 474         if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev) || IS_BROADWELL(dev))
 475                 __gen7_gt_force_wake_mt_reset(dev_priv);
 476
 477         if (IS_GEN9(dev))
 478                 __gen9_gt_force_wake_mt_reset(dev_priv);
 479
 480         if (restore) { /* If reset with a user forcewake, try to restore */
 481                 unsigned fw = 0;
 482
 483                 if (IS_VALLEYVIEW(dev)) {
 484                         if (dev_priv->uncore.fw_rendercount)
 485                                 fw |= FORCEWAKE_RENDER;
 486
 487                         if (dev_priv->uncore.fw_mediacount)
 488                                 fw |= FORCEWAKE_MEDIA;
 489                 } else if (IS_GEN9(dev)) {
 490                         if (dev_priv->uncore.fw_rendercount)
 491                                 fw |= FORCEWAKE_RENDER;
 492
 493                         if (dev_priv->uncore.fw_mediacount)
 494                                 fw |= FORCEWAKE_MEDIA;
 495
 496                         if (dev_priv->uncore.fw_blittercount)
 497                                 fw |= FORCEWAKE_BLITTER;
 498                 } else {
 499                         if (dev_priv->uncore.forcewake_count)
 500                                 fw = FORCEWAKE_ALL;
 501                 }
 502
 503                 if (fw)
 504                         dev_priv->uncore.funcs.force_wake_get(dev_priv, fw);
 505
 506                 if (IS_GEN6(dev) || IS_GEN7(dev))
 507                         dev_priv->uncore.fifo_count =
 508                                 __raw_i915_read32(dev_priv, GTFIFOCTL) &
 509                                 GT_FIFO_FREE_ENTRIES_MASK;
 510         }
 511
 512         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 513 }
 514
 515 static void __intel_uncore_early_sanitize(struct drm_device *dev,
 516                                           bool restore_forcewake)
 517 {
 518         struct drm_i915_private *dev_priv = dev->dev_private;
 519
 520         if (HAS_FPGA_DBG_UNCLAIMED(dev))
 521                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 522
 523         if ((IS_HASWELL(dev) || IS_BROADWELL(dev)) &&
 524             (__raw_i915_read32(dev_priv, HSW_EDRAM_PRESENT) == 1)) {
 525                 /* The docs do not explain exactly how the calculation can be
 526                  * made. It is somewhat guessable, but for now, it's always
 527                  * 128MB.
 528                  * NB: We can't write IDICR yet because we do not have gt funcs
 529                  * set up */
 530                 dev_priv->ellc_size = 128;
 531                 DRM_INFO("Found %zuMB of eLLC\n", dev_priv->ellc_size);
 532         }
 533
 534         /* clear out old GT FIFO errors */
 535         if (IS_GEN6(dev) || IS_GEN7(dev))
 536                 __raw_i915_write32(dev_priv, GTFIFODBG,
 537                                    __raw_i915_read32(dev_priv, GTFIFODBG));
 538
 539         intel_uncore_forcewake_reset(dev, restore_forcewake);
 540 }
 541
 542 void intel_uncore_early_sanitize(struct drm_device *dev, bool restore_forcewake)
 543 {
 544         __intel_uncore_early_sanitize(dev, restore_forcewake);
 545         i915_check_and_clear_faults(dev);
 546 }
 547
 548 void intel_uncore_sanitize(struct drm_device *dev)
 549 {
 550         /* BIOS often leaves RC6 enabled, but disable it for hw init */
 551         intel_disable_gt_powersave(dev);
 552 }
 553
 554 /*
 555  * Generally this is called implicitly by the register read function. However,
 556  * if some sequence requires the GT to not power down then this function should
 557  * be called at the beginning of the sequence followed by a call to
 558  * gen6_gt_force_wake_put() at the end of the sequence.
 559  */
 560 void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)
 561 {
 562         unsigned long irqflags;
 563
 564         if (!dev_priv->uncore.funcs.force_wake_get)
 565                 return;
 566
 567         intel_runtime_pm_get(dev_priv);
 568
 569         /* Redirect to Gen9 specific routine */
 570         if (IS_GEN9(dev_priv->dev))
 571                 return gen9_force_wake_get(dev_priv, fw_engine);
 572
 573         /* Redirect to VLV specific routine */
 574         if (IS_VALLEYVIEW(dev_priv->dev))
 575                 return vlv_force_wake_get(dev_priv, fw_engine);
 576
 577         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 578         if (dev_priv->uncore.forcewake_count++ == 0)
 579                 dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_ALL);
 580         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 581 }
 582
 583 /*
 584  * see gen6_gt_force_wake_get()
 585  */
 586 void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
 587 {
 588         unsigned long irqflags;
 589         bool delayed = false;
 590
 591         if (!dev_priv->uncore.funcs.force_wake_put)
 592                 return;
 593
 594         /* Redirect to Gen9 specific routine */
 595         if (IS_GEN9(dev_priv->dev)) {
 596                 gen9_force_wake_put(dev_priv, fw_engine);
 597                 goto out;
 598         }
 599
 600         /* Redirect to VLV specific routine */
 601         if (IS_VALLEYVIEW(dev_priv->dev)) {
 602                 vlv_force_wake_put(dev_priv, fw_engine);
 603                 goto out;
 604         }
 605
 606
 607         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 608         WARN_ON(!dev_priv->uncore.forcewake_count);
 609
 610         if (--dev_priv->uncore.forcewake_count == 0) {
 611                 dev_priv->uncore.forcewake_count++;
 612                 delayed = true;
 613                 mod_timer_pinned(&dev_priv->uncore.force_wake_timer,
 614                                  jiffies + 1);
 615         }
 616         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 617
 618 out:
 619         if (!delayed)
 620                 intel_runtime_pm_put(dev_priv);
 621 }
 622
 623 void assert_force_wake_inactive(struct drm_i915_private *dev_priv)
 624 {
 625         if (!dev_priv->uncore.funcs.force_wake_get)
 626                 return;
 627
 628         WARN_ON(dev_priv->uncore.forcewake_count > 0);
 629 }
 630
 631 /* We give fast paths for the really cool registers */
 632 #define NEEDS_FORCE_WAKE(dev_priv, reg) \
 633          ((reg) < 0x40000 && (reg) != FORCEWAKE)
 634
 635 #define REG_RANGE(reg, start, end) ((reg) >= (start) && (reg) < (end))
 636
 637 #define FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg) \
 638         (REG_RANGE((reg), 0x2000, 0x4000) || \
 639          REG_RANGE((reg), 0x5000, 0x8000) || \
 640          REG_RANGE((reg), 0xB000, 0x12000) || \
 641          REG_RANGE((reg), 0x2E000, 0x30000))
 642
 643 #define FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg) \
 644         (REG_RANGE((reg), 0x12000, 0x14000) || \
 645          REG_RANGE((reg), 0x22000, 0x24000) || \
 646          REG_RANGE((reg), 0x30000, 0x40000))
 647
 648 #define FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg) \
 649         (REG_RANGE((reg), 0x2000, 0x4000) || \
 650          REG_RANGE((reg), 0x5000, 0x8000) || \
 651          REG_RANGE((reg), 0x8300, 0x8500) || \
 652          REG_RANGE((reg), 0xB000, 0xC000) || \
 653          REG_RANGE((reg), 0xE000, 0xE800))
 654
 655 #define FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg) \
 656         (REG_RANGE((reg), 0x8800, 0x8900) || \
 657          REG_RANGE((reg), 0xD000, 0xD800) || \
 658          REG_RANGE((reg), 0x12000, 0x14000) || \
 659          REG_RANGE((reg), 0x1A000, 0x1C000) || \
 660          REG_RANGE((reg), 0x1E800, 0x1EA00) || \
 661          REG_RANGE((reg), 0x30000, 0x40000))
 662
 663 #define FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg) \
 664         (REG_RANGE((reg), 0x4000, 0x5000) || \
 665          REG_RANGE((reg), 0x8000, 0x8300) || \
 666          REG_RANGE((reg), 0x8500, 0x8600) || \
 667          REG_RANGE((reg), 0x9000, 0xB000) || \
 668          REG_RANGE((reg), 0xC000, 0xC800) || \
 669          REG_RANGE((reg), 0xF000, 0x10000) || \
 670          REG_RANGE((reg), 0x14000, 0x14400) || \
 671          REG_RANGE((reg), 0x22000, 0x24000))
 672
 673 #define FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) \
 674         REG_RANGE((reg), 0xB00,  0x2000)
 675
 676 #define FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) \
 677         (REG_RANGE((reg), 0x2000, 0x2700) || \
 678          REG_RANGE((reg), 0x3000, 0x4000) || \
 679          REG_RANGE((reg), 0x5200, 0x8000) || \
 680          REG_RANGE((reg), 0x8140, 0x8160) || \
 681          REG_RANGE((reg), 0x8300, 0x8500) || \
 682          REG_RANGE((reg), 0x8C00, 0x8D00) || \
 683          REG_RANGE((reg), 0xB000, 0xB480) || \
 684          REG_RANGE((reg), 0xE000, 0xE900) || \
 685          REG_RANGE((reg), 0x24400, 0x24800))
 686
 687 #define FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) \
 688         (REG_RANGE((reg), 0x8130, 0x8140) || \
 689          REG_RANGE((reg), 0x8800, 0x8A00) || \
 690          REG_RANGE((reg), 0xD000, 0xD800) || \
 691          REG_RANGE((reg), 0x12000, 0x14000) || \
 692          REG_RANGE((reg), 0x1A000, 0x1EA00) || \
 693          REG_RANGE((reg), 0x30000, 0x40000))
 694
 695 #define FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg) \
 696         REG_RANGE((reg), 0x9400, 0x9800)
 697
 698 #define FORCEWAKE_GEN9_BLITTER_RANGE_OFFSET(reg) \
 699         ((reg) < 0x40000 &&\
 700          !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) && \
 701          !FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) && \
 702          !FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) && \
 703          !FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg))
 704
 705 static void
 706 ilk_dummy_write(struct drm_i915_private *dev_priv)
 707 {
 708         /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
 709          * the chip from rc6 before touching it for real. MI_MODE is masked,
 710          * hence harmless to write 0 into. */
 711         __raw_i915_write32(dev_priv, MI_MODE, 0);
 712 }
 713
 714 static void
 715 hsw_unclaimed_reg_debug(struct drm_i915_private *dev_priv, u32 reg, bool read,
 716                         bool before)
 717 {
 718         const char *op = read ? "reading" : "writing to";
 719         const char *when = before ? "before" : "after";
 720
 721         if (!i915.mmio_debug)
 722                 return;
 723
 724         if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) {
 725                 WARN(1, "Unclaimed register detected %s %s register 0x%x\n",
 726                      when, op, reg);
 727                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 728         }
 729 }
 730
 731 static void
 732 hsw_unclaimed_reg_detect(struct drm_i915_private *dev_priv)
 733 {
 734         if (i915.mmio_debug)
 735                 return;
 736
 737         if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) {
 738                 DRM_ERROR("Unclaimed register detected. Please use the i915.mmio_debug=1 to debug this problem.");
 739                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
 740         }
 741 }
 742
 743 #define REG_READ_HEADER(x) \
 744         unsigned long irqflags; \
 745         u##x val = 0; \
 746         assert_device_not_suspended(dev_priv); \
 747         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
 748
 749 #define REG_READ_FOOTER \
 750         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
 751         trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
 752         return val
 753
 754 #define __gen4_read(x) \
 755 static u##x \
 756 gen4_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 757         REG_READ_HEADER(x); \
 758         val = __raw_i915_read##x(dev_priv, reg); \
 759         REG_READ_FOOTER; \
 760 }
 761
 762 #define __gen5_read(x) \
 763 static u##x \
 764 gen5_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 765         REG_READ_HEADER(x); \
 766         ilk_dummy_write(dev_priv); \
 767         val = __raw_i915_read##x(dev_priv, reg); \
 768         REG_READ_FOOTER; \
 769 }
 770
 771 #define __gen6_read(x) \
 772 static u##x \
 773 gen6_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 774         REG_READ_HEADER(x); \
 775         hsw_unclaimed_reg_debug(dev_priv, reg, true, true); \
 776         if (dev_priv->uncore.forcewake_count == 0 && \
 777             NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
 778                 dev_priv->uncore.funcs.force_wake_get(dev_priv, \
 779                                                       FORCEWAKE_ALL); \
 780                 val = __raw_i915_read##x(dev_priv, reg); \
 781                 dev_priv->uncore.funcs.force_wake_put(dev_priv, \
 782                                                       FORCEWAKE_ALL); \
 783         } else { \
 784                 val = __raw_i915_read##x(dev_priv, reg); \
 785         } \
 786         hsw_unclaimed_reg_debug(dev_priv, reg, true, false); \
 787         REG_READ_FOOTER; \
 788 }
 789
 790 #define __vlv_read(x) \
 791 static u##x \
 792 vlv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 793         unsigned fwengine = 0; \
 794         REG_READ_HEADER(x); \
 795         if (FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg)) { \
 796                 if (dev_priv->uncore.fw_rendercount == 0) \
 797                         fwengine = FORCEWAKE_RENDER; \
 798         } else if (FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg)) { \
 799                 if (dev_priv->uncore.fw_mediacount == 0) \
 800                         fwengine = FORCEWAKE_MEDIA; \
 801         }  \
 802         if (fwengine) \
 803                 dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
 804         val = __raw_i915_read##x(dev_priv, reg); \
 805         if (fwengine) \
 806                 dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
 807         REG_READ_FOOTER; \
 808 }
 809
 810 #define __chv_read(x) \
 811 static u##x \
 812 chv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 813         unsigned fwengine = 0; \
 814         REG_READ_HEADER(x); \
 815         if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) { \
 816                 if (dev_priv->uncore.fw_rendercount == 0) \
 817                         fwengine = FORCEWAKE_RENDER; \
 818         } else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) { \
 819                 if (dev_priv->uncore.fw_mediacount == 0) \
 820                         fwengine = FORCEWAKE_MEDIA; \
 821         } else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) { \
 822                 if (dev_priv->uncore.fw_rendercount == 0) \
 823                         fwengine |= FORCEWAKE_RENDER; \
 824                 if (dev_priv->uncore.fw_mediacount == 0) \
 825                         fwengine |= FORCEWAKE_MEDIA; \
 826         } \
 827         if (fwengine) \
 828                 dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
 829         val = __raw_i915_read##x(dev_priv, reg); \
 830         if (fwengine) \
 831                 dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
 832         REG_READ_FOOTER; \
 833 }
 834
 835 #define SKL_NEEDS_FORCE_WAKE(dev_priv, reg)     \
 836          ((reg) < 0x40000 && !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg))
 837
 838 #define __gen9_read(x) \
 839 static u##x \
 840 gen9_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 841         REG_READ_HEADER(x); \
 842         if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
 843                 val = __raw_i915_read##x(dev_priv, reg); \
 844         } else { \
 845                 unsigned fwengine = 0; \
 846                 if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg)) { \
 847                         if (dev_priv->uncore.fw_rendercount == 0) \
 848                                 fwengine = FORCEWAKE_RENDER; \
 849                 } else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg)) { \
 850                         if (dev_priv->uncore.fw_mediacount == 0) \
 851                                 fwengine = FORCEWAKE_MEDIA; \
 852                 } else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) { \
 853                         if (dev_priv->uncore.fw_rendercount == 0) \
 854                                 fwengine |= FORCEWAKE_RENDER; \
 855                         if (dev_priv->uncore.fw_mediacount == 0) \
 856                                 fwengine |= FORCEWAKE_MEDIA; \
 857                 } else { \
 858                         if (dev_priv->uncore.fw_blittercount == 0) \
 859                                 fwengine = FORCEWAKE_BLITTER; \
 860                 } \
 861                 if (fwengine) \
 862                         dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
 863                 val = __raw_i915_read##x(dev_priv, reg); \
 864                 if (fwengine) \
 865                         dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
 866         } \
 867         REG_READ_FOOTER; \
 868 }
 869
 870 __gen9_read(8)
 871 __gen9_read(16)
 872 __gen9_read(32)
 873 __gen9_read(64)
 874 __chv_read(8)
 875 __chv_read(16)
 876 __chv_read(32)
 877 __chv_read(64)
 878 __vlv_read(8)
 879 __vlv_read(16)
 880 __vlv_read(32)
 881 __vlv_read(64)
 882 __gen6_read(8)
 883 __gen6_read(16)
 884 __gen6_read(32)
 885 __gen6_read(64)
 886 __gen5_read(8)
 887 __gen5_read(16)
 888 __gen5_read(32)
 889 __gen5_read(64)
 890 __gen4_read(8)
 891 __gen4_read(16)
 892 __gen4_read(32)
 893 __gen4_read(64)
 894
 895 #undef __gen9_read
 896 #undef __chv_read
 897 #undef __vlv_read
 898 #undef __gen6_read
 899 #undef __gen5_read
 900 #undef __gen4_read
 901 #undef REG_READ_FOOTER
 902 #undef REG_READ_HEADER
 903
 904 #define REG_WRITE_HEADER \
 905         unsigned long irqflags; \
 906         trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
 907         assert_device_not_suspended(dev_priv); \
 908         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags)
 909
 910 #define REG_WRITE_FOOTER \
 911         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags)
 912
 913 #define __gen4_write(x) \
 914 static void \
 915 gen4_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 916         REG_WRITE_HEADER; \
 917         __raw_i915_write##x(dev_priv, reg, val); \
 918         REG_WRITE_FOOTER; \
 919 }
 920
 921 #define __gen5_write(x) \
 922 static void \
 923 gen5_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 924         REG_WRITE_HEADER; \
 925         ilk_dummy_write(dev_priv); \
 926         __raw_i915_write##x(dev_priv, reg, val); \
 927         REG_WRITE_FOOTER; \
 928 }
 929
 930 #define __gen6_write(x) \
 931 static void \
 932 gen6_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 933         u32 __fifo_ret = 0; \
 934         REG_WRITE_HEADER; \
 935         if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
 936                 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
 937         } \
 938         __raw_i915_write##x(dev_priv, reg, val); \
 939         if (unlikely(__fifo_ret)) { \
 940                 gen6_gt_check_fifodbg(dev_priv); \
 941         } \
 942         REG_WRITE_FOOTER; \
 943 }
 944
 945 #define __hsw_write(x) \
 946 static void \
 947 hsw_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 948         u32 __fifo_ret = 0; \
 949         REG_WRITE_HEADER; \
 950         if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
 951                 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
 952         } \
 953         hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \
 954         __raw_i915_write##x(dev_priv, reg, val); \
 955         if (unlikely(__fifo_ret)) { \
 956                 gen6_gt_check_fifodbg(dev_priv); \
 957         } \
 958         hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \
 959         hsw_unclaimed_reg_detect(dev_priv); \
 960         REG_WRITE_FOOTER; \
 961 }
 962
 963 static const u32 gen8_shadowed_regs[] = {
 964         FORCEWAKE_MT,
 965         GEN6_RPNSWREQ,
 966         GEN6_RC_VIDEO_FREQ,
 967         RING_TAIL(RENDER_RING_BASE),
 968         RING_TAIL(GEN6_BSD_RING_BASE),
 969         RING_TAIL(VEBOX_RING_BASE),
 970         RING_TAIL(BLT_RING_BASE),
 971         /* TODO: Other registers are not yet used */
 972 };
 973
 974 static bool is_gen8_shadowed(struct drm_i915_private *dev_priv, u32 reg)
 975 {
 976         int i;
 977         for (i = 0; i < ARRAY_SIZE(gen8_shadowed_regs); i++)
 978                 if (reg == gen8_shadowed_regs[i])
 979                         return true;
 980
 981         return false;
 982 }
 983
 984 #define __gen8_write(x) \
 985 static void \
 986 gen8_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 987         REG_WRITE_HEADER; \
 988         hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \
 989         if (reg < 0x40000 && !is_gen8_shadowed(dev_priv, reg)) { \
 990                 if (dev_priv->uncore.forcewake_count == 0) \
 991                         dev_priv->uncore.funcs.force_wake_get(dev_priv, \
 992                                                               FORCEWAKE_ALL); \
 993                 __raw_i915_write##x(dev_priv, reg, val); \
 994                 if (dev_priv->uncore.forcewake_count == 0) \
 995                         dev_priv->uncore.funcs.force_wake_put(dev_priv, \
 996                                                               FORCEWAKE_ALL); \
 997         } else { \
 998                 __raw_i915_write##x(dev_priv, reg, val); \
 999         } \
1000         hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \
1001         hsw_unclaimed_reg_detect(dev_priv); \
1002         REG_WRITE_FOOTER; \
1003 }
1004
1005 #define __chv_write(x) \
1006 static void \
1007 chv_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
1008         unsigned fwengine = 0; \
1009         bool shadowed = is_gen8_shadowed(dev_priv, reg); \
1010         REG_WRITE_HEADER; \
1011         if (!shadowed) { \
1012                 if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) { \
1013                         if (dev_priv->uncore.fw_rendercount == 0) \
1014                                 fwengine = FORCEWAKE_RENDER; \
1015                 } else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) { \
1016                         if (dev_priv->uncore.fw_mediacount == 0) \
1017                                 fwengine = FORCEWAKE_MEDIA; \
1018                 } else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) { \
1019                         if (dev_priv->uncore.fw_rendercount == 0) \
1020                                 fwengine |= FORCEWAKE_RENDER; \
1021                         if (dev_priv->uncore.fw_mediacount == 0) \
1022                                 fwengine |= FORCEWAKE_MEDIA; \
1023                 } \
1024         } \
1025         if (fwengine) \
1026                 dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
1027         __raw_i915_write##x(dev_priv, reg, val); \
1028         if (fwengine) \
1029                 dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
1030         REG_WRITE_FOOTER; \
1031 }
1032
1033 static const u32 gen9_shadowed_regs[] = {
1034         RING_TAIL(RENDER_RING_BASE),
1035         RING_TAIL(GEN6_BSD_RING_BASE),
1036         RING_TAIL(VEBOX_RING_BASE),
1037         RING_TAIL(BLT_RING_BASE),
1038         FORCEWAKE_BLITTER_GEN9,
1039         FORCEWAKE_RENDER_GEN9,
1040         FORCEWAKE_MEDIA_GEN9,
1041         GEN6_RPNSWREQ,
1042         GEN6_RC_VIDEO_FREQ,
1043         /* TODO: Other registers are not yet used */
1044 };
1045
1046 static bool is_gen9_shadowed(struct drm_i915_private *dev_priv, u32 reg)
1047 {
1048         int i;
1049         for (i = 0; i < ARRAY_SIZE(gen9_shadowed_regs); i++)
1050                 if (reg == gen9_shadowed_regs[i])
1051                         return true;
1052
1053         return false;
1054 }
1055
1056 #define __gen9_write(x) \
1057 static void \
1058 gen9_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, \
1059                 bool trace) { \
1060         REG_WRITE_HEADER; \
1061         if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg)) || \
1062                         is_gen9_shadowed(dev_priv, reg)) { \
1063                 __raw_i915_write##x(dev_priv, reg, val); \
1064         } else { \
1065                 unsigned fwengine = 0; \
1066                 if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg)) { \
1067                         if (dev_priv->uncore.fw_rendercount == 0) \
1068                                 fwengine = FORCEWAKE_RENDER; \
1069                 } else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg)) { \
1070                         if (dev_priv->uncore.fw_mediacount == 0) \
1071                                 fwengine = FORCEWAKE_MEDIA; \
1072                 } else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) { \
1073                         if (dev_priv->uncore.fw_rendercount == 0) \
1074                                 fwengine |= FORCEWAKE_RENDER; \
1075                         if (dev_priv->uncore.fw_mediacount == 0) \
1076                                 fwengine |= FORCEWAKE_MEDIA; \
1077                 } else { \
1078                         if (dev_priv->uncore.fw_blittercount == 0) \
1079                                 fwengine = FORCEWAKE_BLITTER; \
1080                 } \
1081                 if (fwengine) \
1082                         dev_priv->uncore.funcs.force_wake_get(dev_priv, \
1083                                         fwengine); \
1084                 __raw_i915_write##x(dev_priv, reg, val); \
1085                 if (fwengine) \
1086                         dev_priv->uncore.funcs.force_wake_put(dev_priv, \
1087                                         fwengine); \
1088         } \
1089         REG_WRITE_FOOTER; \
1090 }
1091
1092 __gen9_write(8)
1093 __gen9_write(16)
1094 __gen9_write(32)
1095 __gen9_write(64)
1096 __chv_write(8)
1097 __chv_write(16)
1098 __chv_write(32)
1099 __chv_write(64)
1100 __gen8_write(8)
1101 __gen8_write(16)
1102 __gen8_write(32)
1103 __gen8_write(64)
1104 __hsw_write(8)
1105 __hsw_write(16)
1106 __hsw_write(32)
1107 __hsw_write(64)
1108 __gen6_write(8)
1109 __gen6_write(16)
1110 __gen6_write(32)
1111 __gen6_write(64)
1112 __gen5_write(8)
1113 __gen5_write(16)
1114 __gen5_write(32)
1115 __gen5_write(64)
1116 __gen4_write(8)
1117 __gen4_write(16)
1118 __gen4_write(32)
1119 __gen4_write(64)
1120
1121 #undef __gen9_write
1122 #undef __chv_write
1123 #undef __gen8_write
1124 #undef __hsw_write
1125 #undef __gen6_write
1126 #undef __gen5_write
1127 #undef __gen4_write
1128 #undef REG_WRITE_FOOTER
1129 #undef REG_WRITE_HEADER
1130
1131 #define ASSIGN_WRITE_MMIO_VFUNCS(x) \
1132 do { \
1133         dev_priv->uncore.funcs.mmio_writeb = x##_write8; \
1134         dev_priv->uncore.funcs.mmio_writew = x##_write16; \
1135         dev_priv->uncore.funcs.mmio_writel = x##_write32; \
1136         dev_priv->uncore.funcs.mmio_writeq = x##_write64; \
1137 } while (0)
1138
1139 #define ASSIGN_READ_MMIO_VFUNCS(x) \
1140 do { \
1141         dev_priv->uncore.funcs.mmio_readb = x##_read8; \
1142         dev_priv->uncore.funcs.mmio_readw = x##_read16; \
1143         dev_priv->uncore.funcs.mmio_readl = x##_read32; \
1144         dev_priv->uncore.funcs.mmio_readq = x##_read64; \
1145 } while (0)
1146
1147 void intel_uncore_init(struct drm_device *dev)
1148 {
1149         struct drm_i915_private *dev_priv = dev->dev_private;
1150
1151         setup_timer(&dev_priv->uncore.force_wake_timer,
1152                     gen6_force_wake_timer, (unsigned long)dev_priv);
1153
1154         __intel_uncore_early_sanitize(dev, false);
1155
1156         if (IS_GEN9(dev)) {
1157                 dev_priv->uncore.funcs.force_wake_get = __gen9_force_wake_get;
1158                 dev_priv->uncore.funcs.force_wake_put = __gen9_force_wake_put;
1159         } else if (IS_VALLEYVIEW(dev)) {
1160                 dev_priv->uncore.funcs.force_wake_get = __vlv_force_wake_get;
1161                 dev_priv->uncore.funcs.force_wake_put = __vlv_force_wake_put;
1162         } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
1163                 dev_priv->uncore.funcs.force_wake_get = __gen7_gt_force_wake_mt_get;
1164                 dev_priv->uncore.funcs.force_wake_put = __gen7_gt_force_wake_mt_put;
1165         } else if (IS_IVYBRIDGE(dev)) {
1166                 u32 ecobus;
1167
1168                 /* IVB configs may use multi-threaded forcewake */
1169
1170                 /* A small trick here - if the bios hasn't configured
1171                  * MT forcewake, and if the device is in RC6, then
1172                  * force_wake_mt_get will not wake the device and the
1173                  * ECOBUS read will return zero. Which will be
1174                  * (correctly) interpreted by the test below as MT
1175                  * forcewake being disabled.
1176                  */
1177                 mutex_lock(&dev->struct_mutex);
1178                 __gen7_gt_force_wake_mt_get(dev_priv, FORCEWAKE_ALL);
1179                 ecobus = __raw_i915_read32(dev_priv, ECOBUS);
1180                 __gen7_gt_force_wake_mt_put(dev_priv, FORCEWAKE_ALL);
1181                 mutex_unlock(&dev->struct_mutex);
1182
1183                 if (ecobus & FORCEWAKE_MT_ENABLE) {
1184                         dev_priv->uncore.funcs.force_wake_get =
1185                                 __gen7_gt_force_wake_mt_get;
1186                         dev_priv->uncore.funcs.force_wake_put =
1187                                 __gen7_gt_force_wake_mt_put;
1188                 } else {
1189                         DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
1190                         DRM_INFO("when using vblank-synced partial screen updates.\n");
1191                         dev_priv->uncore.funcs.force_wake_get =
1192                                 __gen6_gt_force_wake_get;
1193                         dev_priv->uncore.funcs.force_wake_put =
1194                                 __gen6_gt_force_wake_put;
1195                 }
1196         } else if (IS_GEN6(dev)) {
1197                 dev_priv->uncore.funcs.force_wake_get =
1198                         __gen6_gt_force_wake_get;
1199                 dev_priv->uncore.funcs.force_wake_put =
1200                         __gen6_gt_force_wake_put;
1201         }
1202
1203         switch (INTEL_INFO(dev)->gen) {
1204         default:
1205                 WARN_ON(1);
1206                 return;
1207         case 9:
1208                 ASSIGN_WRITE_MMIO_VFUNCS(gen9);
1209                 ASSIGN_READ_MMIO_VFUNCS(gen9);
1210                 break;
1211         case 8:
1212                 if (IS_CHERRYVIEW(dev)) {
1213                         ASSIGN_WRITE_MMIO_VFUNCS(chv);
1214                         ASSIGN_READ_MMIO_VFUNCS(chv);
1215
1216                 } else {
1217                         ASSIGN_WRITE_MMIO_VFUNCS(gen8);
1218                         ASSIGN_READ_MMIO_VFUNCS(gen6);
1219                 }
1220                 break;
1221         case 7:
1222         case 6:
1223                 if (IS_HASWELL(dev)) {
1224                         ASSIGN_WRITE_MMIO_VFUNCS(hsw);
1225                 } else {
1226                         ASSIGN_WRITE_MMIO_VFUNCS(gen6);
1227                 }
1228
1229                 if (IS_VALLEYVIEW(dev)) {
1230                         ASSIGN_READ_MMIO_VFUNCS(vlv);
1231                 } else {
1232                         ASSIGN_READ_MMIO_VFUNCS(gen6);
1233                 }
1234                 break;
1235         case 5:
1236                 ASSIGN_WRITE_MMIO_VFUNCS(gen5);
1237                 ASSIGN_READ_MMIO_VFUNCS(gen5);
1238                 break;
1239         case 4:
1240         case 3:
1241         case 2:
1242                 ASSIGN_WRITE_MMIO_VFUNCS(gen4);
1243                 ASSIGN_READ_MMIO_VFUNCS(gen4);
1244                 break;
1245         }
1246
1247         i915_check_and_clear_faults(dev);
1248 }
1249 #undef ASSIGN_WRITE_MMIO_VFUNCS
1250 #undef ASSIGN_READ_MMIO_VFUNCS
1251
1252 void intel_uncore_fini(struct drm_device *dev)
1253 {
1254         /* Paranoia: make sure we have disabled everything before we exit. */
1255         intel_uncore_sanitize(dev);
1256         intel_uncore_forcewake_reset(dev, false);
1257 }
1258
1259 #define GEN_RANGE(l, h) GENMASK(h, l)
1260
1261 static const struct register_whitelist {
1262         uint64_t offset;
1263         uint32_t size;
1264         /* supported gens, 0x10 for 4, 0x30 for 4 and 5, etc. */
1265         uint32_t gen_bitmask;
1266 } whitelist[] = {
1267         { RING_TIMESTAMP(RENDER_RING_BASE), 8, GEN_RANGE(4, 9) },
1268 };
1269
1270 int i915_reg_read_ioctl(struct drm_device *dev,
1271                         void *data, struct drm_file *file)
1272 {
1273         struct drm_i915_private *dev_priv = dev->dev_private;
1274         struct drm_i915_reg_read *reg = data;
1275         struct register_whitelist const *entry = whitelist;
1276         int i, ret = 0;
1277
1278         for (i = 0; i < ARRAY_SIZE(whitelist); i++, entry++) {
1279                 if (entry->offset == reg->offset &&
1280                     (1 << INTEL_INFO(dev)->gen & entry->gen_bitmask))
1281                         break;
1282         }
1283
1284         if (i == ARRAY_SIZE(whitelist))
1285                 return -EINVAL;
1286
1287         intel_runtime_pm_get(dev_priv);
1288
1289         switch (entry->size) {
1290         case 8:
1291                 reg->val = I915_READ64(reg->offset);
1292                 break;
1293         case 4:
1294                 reg->val = I915_READ(reg->offset);
1295                 break;
1296         case 2:
1297                 reg->val = I915_READ16(reg->offset);
1298                 break;
1299         case 1:
1300                 reg->val = I915_READ8(reg->offset);
1301                 break;
1302         default:
1303                 WARN_ON(1);
1304                 ret = -EINVAL;
1305                 goto out;
1306         }
1307
1308 out:
1309         intel_runtime_pm_put(dev_priv);
1310         return ret;
1311 }
1312
1313 int i915_get_reset_stats_ioctl(struct drm_device *dev,
1314                                void *data, struct drm_file *file)
1315 {
1316         struct drm_i915_private *dev_priv = dev->dev_private;
1317         struct drm_i915_reset_stats *args = data;
1318         struct i915_ctx_hang_stats *hs;
1319         struct intel_context *ctx;
1320         int ret;
1321
1322         if (args->flags || args->pad)
1323                 return -EINVAL;
1324
1325         if (args->ctx_id == DEFAULT_CONTEXT_HANDLE && !capable(CAP_SYS_ADMIN))
1326                 return -EPERM;
1327
1328         ret = mutex_lock_interruptible(&dev->struct_mutex);
1329         if (ret)
1330                 return ret;
1331
1332         ctx = i915_gem_context_get(file->driver_priv, args->ctx_id);
1333         if (IS_ERR(ctx)) {
1334                 mutex_unlock(&dev->struct_mutex);
1335                 return PTR_ERR(ctx);
1336         }
1337         hs = &ctx->hang_stats;
1338
1339         if (capable(CAP_SYS_ADMIN))
1340                 args->reset_count = i915_reset_count(&dev_priv->gpu_error);
1341         else
1342                 args->reset_count = 0;
1343
1344         args->batch_active = hs->batch_active;
1345         args->batch_pending = hs->batch_pending;
1346
1347         mutex_unlock(&dev->struct_mutex);
1348
1349         return 0;
1350 }
1351
1352 static int i915_reset_complete(struct drm_device *dev)
1353 {
1354         u8 gdrst;
1355         pci_read_config_byte(dev->pdev, I915_GDRST, &gdrst);
1356         return (gdrst & GRDOM_RESET_STATUS) == 0;
1357 }
1358
1359 static int i915_do_reset(struct drm_device *dev)
1360 {
1361         /* assert reset for at least 20 usec */
1362         pci_write_config_byte(dev->pdev, I915_GDRST, GRDOM_RESET_ENABLE);
1363         udelay(20);
1364         pci_write_config_byte(dev->pdev, I915_GDRST, 0);
1365
1366         return wait_for(i915_reset_complete(dev), 500);
1367 }
1368
1369 static int g4x_reset_complete(struct drm_device *dev)
1370 {
1371         u8 gdrst;
1372         pci_read_config_byte(dev->pdev, I915_GDRST, &gdrst);
1373         return (gdrst & GRDOM_RESET_ENABLE) == 0;
1374 }
1375
1376 static int g33_do_reset(struct drm_device *dev)
1377 {
1378         pci_write_config_byte(dev->pdev, I915_GDRST, GRDOM_RESET_ENABLE);
1379         return wait_for(g4x_reset_complete(dev), 500);
1380 }
1381
1382 static int g4x_do_reset(struct drm_device *dev)
1383 {
1384         struct drm_i915_private *dev_priv = dev->dev_private;
1385         int ret;
1386
1387         pci_write_config_byte(dev->pdev, I915_GDRST,
1388                               GRDOM_RENDER | GRDOM_RESET_ENABLE);
1389         ret =  wait_for(g4x_reset_complete(dev), 500);
1390         if (ret)
1391                 return ret;
1392
1393         /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1394         I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) | VCP_UNIT_CLOCK_GATE_DISABLE);
1395         POSTING_READ(VDECCLK_GATE_D);
1396
1397         pci_write_config_byte(dev->pdev, I915_GDRST,
1398                               GRDOM_MEDIA | GRDOM_RESET_ENABLE);
1399         ret =  wait_for(g4x_reset_complete(dev), 500);
1400         if (ret)
1401                 return ret;
1402
1403         /* WaVcpClkGateDisableForMediaReset:ctg,elk */
1404         I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) & ~VCP_UNIT_CLOCK_GATE_DISABLE);
1405         POSTING_READ(VDECCLK_GATE_D);
1406
1407         pci_write_config_byte(dev->pdev, I915_GDRST, 0);
1408
1409         return 0;
1410 }
1411
1412 static int ironlake_do_reset(struct drm_device *dev)
1413 {
1414         struct drm_i915_private *dev_priv = dev->dev_private;
1415         int ret;
1416
1417         I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
1418                    ILK_GRDOM_RENDER | ILK_GRDOM_RESET_ENABLE);
1419         ret = wait_for((I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) &
1420                         ILK_GRDOM_RESET_ENABLE) == 0, 500);
1421         if (ret)
1422                 return ret;
1423
1424         I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
1425                    ILK_GRDOM_MEDIA | ILK_GRDOM_RESET_ENABLE);
1426         ret = wait_for((I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) &
1427                         ILK_GRDOM_RESET_ENABLE) == 0, 500);
1428         if (ret)
1429                 return ret;
1430
1431         I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR, 0);
1432
1433         return 0;
1434 }
1435
1436 static int gen6_do_reset(struct drm_device *dev)
1437 {
1438         struct drm_i915_private *dev_priv = dev->dev_private;
1439         int     ret;
1440
1441         /* Reset the chip */
1442
1443         /* GEN6_GDRST is not in the gt power well, no need to check
1444          * for fifo space for the write or forcewake the chip for
1445          * the read
1446          */
1447         __raw_i915_write32(dev_priv, GEN6_GDRST, GEN6_GRDOM_FULL);
1448
1449         /* Spin waiting for the device to ack the reset request */
1450         ret = wait_for((__raw_i915_read32(dev_priv, GEN6_GDRST) & GEN6_GRDOM_FULL) == 0, 500);
1451
1452         intel_uncore_forcewake_reset(dev, true);
1453
1454         return ret;
1455 }
1456
1457 int intel_gpu_reset(struct drm_device *dev)
1458 {
1459         if (INTEL_INFO(dev)->gen >= 6)
1460                 return gen6_do_reset(dev);
1461         else if (IS_GEN5(dev))
1462                 return ironlake_do_reset(dev);
1463         else if (IS_G4X(dev))
1464                 return g4x_do_reset(dev);
1465         else if (IS_G33(dev))
1466                 return g33_do_reset(dev);
1467         else if (INTEL_INFO(dev)->gen >= 3)
1468                 return i915_do_reset(dev);
1469         else
1470                 return -ENODEV;
1471 }
1472
1473 void intel_uncore_check_errors(struct drm_device *dev)
1474 {
1475         struct drm_i915_private *dev_priv = dev->dev_private;
1476
1477         if (HAS_FPGA_DBG_UNCLAIMED(dev) &&
1478             (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
1479                 DRM_ERROR("Unclaimed register before interrupt\n");
1480                 __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
1481         }
1482 }