drivers/gpu/drm/i915/i915_irq.c

   1 /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
   2  */
   3 /*
   4  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  */
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/sysrq.h>
  32 #include <linux/slab.h>
  33 #include <linux/circ_buf.h>
  34 #include <drm/drmP.h>
  35 #include <drm/i915_drm.h>
  36 #include "i915_drv.h"
  37 #include "i915_trace.h"
  38 #include "intel_drv.h"
  39
  40 /**
  41  * DOC: interrupt handling
  42  *
  43  * These functions provide the basic support for enabling and disabling the
  44  * interrupt handling support. There's a lot more functionality in i915_irq.c
  45  * and related files, but that will be described in separate chapters.
  46  */
  47
  48 static const u32 hpd_ilk[HPD_NUM_PINS] = {
  49         [HPD_PORT_A] = DE_DP_A_HOTPLUG,
  50 };
  51
  52 static const u32 hpd_ivb[HPD_NUM_PINS] = {
  53         [HPD_PORT_A] = DE_DP_A_HOTPLUG_IVB,
  54 };
  55
  56 static const u32 hpd_bdw[HPD_NUM_PINS] = {
  57         [HPD_PORT_A] = GEN8_PORT_DP_A_HOTPLUG,
  58 };
  59
  60 static const u32 hpd_ibx[HPD_NUM_PINS] = {
  61         [HPD_CRT] = SDE_CRT_HOTPLUG,
  62         [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
  63         [HPD_PORT_B] = SDE_PORTB_HOTPLUG,
  64         [HPD_PORT_C] = SDE_PORTC_HOTPLUG,
  65         [HPD_PORT_D] = SDE_PORTD_HOTPLUG
  66 };
  67
  68 static const u32 hpd_cpt[HPD_NUM_PINS] = {
  69         [HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
  70         [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
  71         [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
  72         [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
  73         [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
  74 };
  75
  76 static const u32 hpd_spt[HPD_NUM_PINS] = {
  77         [HPD_PORT_A] = SDE_PORTA_HOTPLUG_SPT,
  78         [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
  79         [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
  80         [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT,
  81         [HPD_PORT_E] = SDE_PORTE_HOTPLUG_SPT
  82 };
  83
  84 static const u32 hpd_mask_i915[HPD_NUM_PINS] = {
  85         [HPD_CRT] = CRT_HOTPLUG_INT_EN,
  86         [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
  87         [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
  88         [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
  89         [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
  90         [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
  91 };
  92
  93 static const u32 hpd_status_g4x[HPD_NUM_PINS] = {
  94         [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
  95         [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
  96         [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
  97         [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
  98         [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
  99         [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
 100 };
 101
 102 static const u32 hpd_status_i915[HPD_NUM_PINS] = {
 103         [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
 104         [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
 105         [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
 106         [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
 107         [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
 108         [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
 109 };
 110
 111 /* BXT hpd list */
 112 static const u32 hpd_bxt[HPD_NUM_PINS] = {
 113         [HPD_PORT_A] = BXT_DE_PORT_HP_DDIA,
 114         [HPD_PORT_B] = BXT_DE_PORT_HP_DDIB,
 115         [HPD_PORT_C] = BXT_DE_PORT_HP_DDIC
 116 };
 117
 118 static const u32 hpd_gen11[HPD_NUM_PINS] = {
 119         [HPD_PORT_C] = GEN11_TC1_HOTPLUG | GEN11_TBT1_HOTPLUG,
 120         [HPD_PORT_D] = GEN11_TC2_HOTPLUG | GEN11_TBT2_HOTPLUG,
 121         [HPD_PORT_E] = GEN11_TC3_HOTPLUG | GEN11_TBT3_HOTPLUG,
 122         [HPD_PORT_F] = GEN11_TC4_HOTPLUG | GEN11_TBT4_HOTPLUG
 123 };
 124
 125 static const u32 hpd_icp[HPD_NUM_PINS] = {
 126         [HPD_PORT_A] = SDE_DDIA_HOTPLUG_ICP,
 127         [HPD_PORT_B] = SDE_DDIB_HOTPLUG_ICP,
 128         [HPD_PORT_C] = SDE_TC1_HOTPLUG_ICP,
 129         [HPD_PORT_D] = SDE_TC2_HOTPLUG_ICP,
 130         [HPD_PORT_E] = SDE_TC3_HOTPLUG_ICP,
 131         [HPD_PORT_F] = SDE_TC4_HOTPLUG_ICP
 132 };
 133
 134 /* IIR can theoretically queue up two events. Be paranoid. */
 135 #define GEN8_IRQ_RESET_NDX(type, which) do { \
 136         I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
 137         POSTING_READ(GEN8_##type##_IMR(which)); \
 138         I915_WRITE(GEN8_##type##_IER(which), 0); \
 139         I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
 140         POSTING_READ(GEN8_##type##_IIR(which)); \
 141         I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
 142         POSTING_READ(GEN8_##type##_IIR(which)); \
 143 } while (0)
 144
 145 #define GEN3_IRQ_RESET(type) do { \
 146         I915_WRITE(type##IMR, 0xffffffff); \
 147         POSTING_READ(type##IMR); \
 148         I915_WRITE(type##IER, 0); \
 149         I915_WRITE(type##IIR, 0xffffffff); \
 150         POSTING_READ(type##IIR); \
 151         I915_WRITE(type##IIR, 0xffffffff); \
 152         POSTING_READ(type##IIR); \
 153 } while (0)
 154
 155 #define GEN2_IRQ_RESET(type) do { \
 156         I915_WRITE16(type##IMR, 0xffff); \
 157         POSTING_READ16(type##IMR); \
 158         I915_WRITE16(type##IER, 0); \
 159         I915_WRITE16(type##IIR, 0xffff); \
 160         POSTING_READ16(type##IIR); \
 161         I915_WRITE16(type##IIR, 0xffff); \
 162         POSTING_READ16(type##IIR); \
 163 } while (0)
 164
 165 /*
 166  * We should clear IMR at preinstall/uninstall, and just check at postinstall.
 167  */
 168 static void gen3_assert_iir_is_zero(struct drm_i915_private *dev_priv,
 169                                     i915_reg_t reg)
 170 {
 171         u32 val = I915_READ(reg);
 172
 173         if (val == 0)
 174                 return;
 175
 176         WARN(1, "Interrupt register 0x%x is not zero: 0x%08x\n",
 177              i915_mmio_reg_offset(reg), val);
 178         I915_WRITE(reg, 0xffffffff);
 179         POSTING_READ(reg);
 180         I915_WRITE(reg, 0xffffffff);
 181         POSTING_READ(reg);
 182 }
 183
 184 static void gen2_assert_iir_is_zero(struct drm_i915_private *dev_priv,
 185                                     i915_reg_t reg)
 186 {
 187         u16 val = I915_READ16(reg);
 188
 189         if (val == 0)
 190                 return;
 191
 192         WARN(1, "Interrupt register 0x%x is not zero: 0x%08x\n",
 193              i915_mmio_reg_offset(reg), val);
 194         I915_WRITE16(reg, 0xffff);
 195         POSTING_READ16(reg);
 196         I915_WRITE16(reg, 0xffff);
 197         POSTING_READ16(reg);
 198 }
 199
 200 #define GEN8_IRQ_INIT_NDX(type, which, imr_val, ier_val) do { \
 201         gen3_assert_iir_is_zero(dev_priv, GEN8_##type##_IIR(which)); \
 202         I915_WRITE(GEN8_##type##_IER(which), (ier_val)); \
 203         I915_WRITE(GEN8_##type##_IMR(which), (imr_val)); \
 204         POSTING_READ(GEN8_##type##_IMR(which)); \
 205 } while (0)
 206
 207 #define GEN3_IRQ_INIT(type, imr_val, ier_val) do { \
 208         gen3_assert_iir_is_zero(dev_priv, type##IIR); \
 209         I915_WRITE(type##IER, (ier_val)); \
 210         I915_WRITE(type##IMR, (imr_val)); \
 211         POSTING_READ(type##IMR); \
 212 } while (0)
 213
 214 #define GEN2_IRQ_INIT(type, imr_val, ier_val) do { \
 215         gen2_assert_iir_is_zero(dev_priv, type##IIR); \
 216         I915_WRITE16(type##IER, (ier_val)); \
 217         I915_WRITE16(type##IMR, (imr_val)); \
 218         POSTING_READ16(type##IMR); \
 219 } while (0)
 220
 221 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
 222 static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
 223
 224 /* For display hotplug interrupt */
 225 static inline void
 226 i915_hotplug_interrupt_update_locked(struct drm_i915_private *dev_priv,
 227                                      uint32_t mask,
 228                                      uint32_t bits)
 229 {
 230         uint32_t val;
 231
 232         lockdep_assert_held(&dev_priv->irq_lock);
 233         WARN_ON(bits & ~mask);
 234
 235         val = I915_READ(PORT_HOTPLUG_EN);
 236         val &= ~mask;
 237         val |= bits;
 238         I915_WRITE(PORT_HOTPLUG_EN, val);
 239 }
 240
 241 /**
 242  * i915_hotplug_interrupt_update - update hotplug interrupt enable
 243  * @dev_priv: driver private
 244  * @mask: bits to update
 245  * @bits: bits to enable
 246  * NOTE: the HPD enable bits are modified both inside and outside
 247  * of an interrupt context. To avoid that read-modify-write cycles
 248  * interfer, these bits are protected by a spinlock. Since this
 249  * function is usually not called from a context where the lock is
 250  * held already, this function acquires the lock itself. A non-locking
 251  * version is also available.
 252  */
 253 void i915_hotplug_interrupt_update(struct drm_i915_private *dev_priv,
 254                                    uint32_t mask,
 255                                    uint32_t bits)
 256 {
 257         spin_lock_irq(&dev_priv->irq_lock);
 258         i915_hotplug_interrupt_update_locked(dev_priv, mask, bits);
 259         spin_unlock_irq(&dev_priv->irq_lock);
 260 }
 261
 262 static u32
 263 gen11_gt_engine_identity(struct drm_i915_private * const i915,
 264                          const unsigned int bank, const unsigned int bit);
 265
 266 static bool gen11_reset_one_iir(struct drm_i915_private * const i915,
 267                                 const unsigned int bank,
 268                                 const unsigned int bit)
 269 {
 270         void __iomem * const regs = i915->regs;
 271         u32 dw;
 272
 273         lockdep_assert_held(&i915->irq_lock);
 274
 275         dw = raw_reg_read(regs, GEN11_GT_INTR_DW(bank));
 276         if (dw & BIT(bit)) {
 277                 /*
 278                  * According to the BSpec, DW_IIR bits cannot be cleared without
 279                  * first servicing the Selector & Shared IIR registers.
 280                  */
 281                 gen11_gt_engine_identity(i915, bank, bit);
 282
 283                 /*
 284                  * We locked GT INT DW by reading it. If we want to (try
 285                  * to) recover from this succesfully, we need to clear
 286                  * our bit, otherwise we are locking the register for
 287                  * everybody.
 288                  */
 289                 raw_reg_write(regs, GEN11_GT_INTR_DW(bank), BIT(bit));
 290
 291                 return true;
 292         }
 293
 294         return false;
 295 }
 296
 297 /**
 298  * ilk_update_display_irq - update DEIMR
 299  * @dev_priv: driver private
 300  * @interrupt_mask: mask of interrupt bits to update
 301  * @enabled_irq_mask: mask of interrupt bits to enable
 302  */
 303 void ilk_update_display_irq(struct drm_i915_private *dev_priv,
 304                             uint32_t interrupt_mask,
 305                             uint32_t enabled_irq_mask)
 306 {
 307         uint32_t new_val;
 308
 309         lockdep_assert_held(&dev_priv->irq_lock);
 310
 311         WARN_ON(enabled_irq_mask & ~interrupt_mask);
 312
 313         if (WARN_ON(!intel_irqs_enabled(dev_priv)))
 314                 return;
 315
 316         new_val = dev_priv->irq_mask;
 317         new_val &= ~interrupt_mask;
 318         new_val |= (~enabled_irq_mask & interrupt_mask);
 319
 320         if (new_val != dev_priv->irq_mask) {
 321                 dev_priv->irq_mask = new_val;
 322                 I915_WRITE(DEIMR, dev_priv->irq_mask);
 323                 POSTING_READ(DEIMR);
 324         }
 325 }
 326
 327 /**
 328  * ilk_update_gt_irq - update GTIMR
 329  * @dev_priv: driver private
 330  * @interrupt_mask: mask of interrupt bits to update
 331  * @enabled_irq_mask: mask of interrupt bits to enable
 332  */
 333 static void ilk_update_gt_irq(struct drm_i915_private *dev_priv,
 334                               uint32_t interrupt_mask,
 335                               uint32_t enabled_irq_mask)
 336 {
 337         lockdep_assert_held(&dev_priv->irq_lock);
 338
 339         WARN_ON(enabled_irq_mask & ~interrupt_mask);
 340
 341         if (WARN_ON(!intel_irqs_enabled(dev_priv)))
 342                 return;
 343
 344         dev_priv->gt_irq_mask &= ~interrupt_mask;
 345         dev_priv->gt_irq_mask |= (~enabled_irq_mask & interrupt_mask);
 346         I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
 347 }
 348
 349 void gen5_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
 350 {
 351         ilk_update_gt_irq(dev_priv, mask, mask);
 352         POSTING_READ_FW(GTIMR);
 353 }
 354
 355 void gen5_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
 356 {
 357         ilk_update_gt_irq(dev_priv, mask, 0);
 358 }
 359
 360 static i915_reg_t gen6_pm_iir(struct drm_i915_private *dev_priv)
 361 {
 362         WARN_ON_ONCE(INTEL_GEN(dev_priv) >= 11);
 363
 364         return INTEL_GEN(dev_priv) >= 8 ? GEN8_GT_IIR(2) : GEN6_PMIIR;
 365 }
 366
 367 static i915_reg_t gen6_pm_imr(struct drm_i915_private *dev_priv)
 368 {
 369         if (INTEL_GEN(dev_priv) >= 11)
 370                 return GEN11_GPM_WGBOXPERF_INTR_MASK;
 371         else if (INTEL_GEN(dev_priv) >= 8)
 372                 return GEN8_GT_IMR(2);
 373         else
 374                 return GEN6_PMIMR;
 375 }
 376
 377 static i915_reg_t gen6_pm_ier(struct drm_i915_private *dev_priv)
 378 {
 379         if (INTEL_GEN(dev_priv) >= 11)
 380                 return GEN11_GPM_WGBOXPERF_INTR_ENABLE;
 381         else if (INTEL_GEN(dev_priv) >= 8)
 382                 return GEN8_GT_IER(2);
 383         else
 384                 return GEN6_PMIER;
 385 }
 386
 387 /**
 388  * snb_update_pm_irq - update GEN6_PMIMR
 389  * @dev_priv: driver private
 390  * @interrupt_mask: mask of interrupt bits to update
 391  * @enabled_irq_mask: mask of interrupt bits to enable
 392  */
 393 static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
 394                               uint32_t interrupt_mask,
 395                               uint32_t enabled_irq_mask)
 396 {
 397         uint32_t new_val;
 398
 399         WARN_ON(enabled_irq_mask & ~interrupt_mask);
 400
 401         lockdep_assert_held(&dev_priv->irq_lock);
 402
 403         new_val = dev_priv->pm_imr;
 404         new_val &= ~interrupt_mask;
 405         new_val |= (~enabled_irq_mask & interrupt_mask);
 406
 407         if (new_val != dev_priv->pm_imr) {
 408                 dev_priv->pm_imr = new_val;
 409                 I915_WRITE(gen6_pm_imr(dev_priv), dev_priv->pm_imr);
 410                 POSTING_READ(gen6_pm_imr(dev_priv));
 411         }
 412 }
 413
 414 void gen6_unmask_pm_irq(struct drm_i915_private *dev_priv, u32 mask)
 415 {
 416         if (WARN_ON(!intel_irqs_enabled(dev_priv)))
 417                 return;
 418
 419         snb_update_pm_irq(dev_priv, mask, mask);
 420 }
 421
 422 static void __gen6_mask_pm_irq(struct drm_i915_private *dev_priv, u32 mask)
 423 {
 424         snb_update_pm_irq(dev_priv, mask, 0);
 425 }
 426
 427 void gen6_mask_pm_irq(struct drm_i915_private *dev_priv, u32 mask)
 428 {
 429         if (WARN_ON(!intel_irqs_enabled(dev_priv)))
 430                 return;
 431
 432         __gen6_mask_pm_irq(dev_priv, mask);
 433 }
 434
 435 static void gen6_reset_pm_iir(struct drm_i915_private *dev_priv, u32 reset_mask)
 436 {
 437         i915_reg_t reg = gen6_pm_iir(dev_priv);
 438
 439         lockdep_assert_held(&dev_priv->irq_lock);
 440
 441         I915_WRITE(reg, reset_mask);
 442         I915_WRITE(reg, reset_mask);
 443         POSTING_READ(reg);
 444 }
 445
 446 static void gen6_enable_pm_irq(struct drm_i915_private *dev_priv, u32 enable_mask)
 447 {
 448         lockdep_assert_held(&dev_priv->irq_lock);
 449
 450         dev_priv->pm_ier |= enable_mask;
 451         I915_WRITE(gen6_pm_ier(dev_priv), dev_priv->pm_ier);
 452         gen6_unmask_pm_irq(dev_priv, enable_mask);
 453         /* unmask_pm_irq provides an implicit barrier (POSTING_READ) */
 454 }
 455
 456 static void gen6_disable_pm_irq(struct drm_i915_private *dev_priv, u32 disable_mask)
 457 {
 458         lockdep_assert_held(&dev_priv->irq_lock);
 459
 460         dev_priv->pm_ier &= ~disable_mask;
 461         __gen6_mask_pm_irq(dev_priv, disable_mask);
 462         I915_WRITE(gen6_pm_ier(dev_priv), dev_priv->pm_ier);
 463         /* though a barrier is missing here, but don't really need a one */
 464 }
 465
 466 void gen11_reset_rps_interrupts(struct drm_i915_private *dev_priv)
 467 {
 468         spin_lock_irq(&dev_priv->irq_lock);
 469
 470         while (gen11_reset_one_iir(dev_priv, 0, GEN11_GTPM))
 471                 ;
 472
 473         dev_priv->gt_pm.rps.pm_iir = 0;
 474
 475         spin_unlock_irq(&dev_priv->irq_lock);
 476 }
 477
 478 void gen6_reset_rps_interrupts(struct drm_i915_private *dev_priv)
 479 {
 480         spin_lock_irq(&dev_priv->irq_lock);
 481         gen6_reset_pm_iir(dev_priv, GEN6_PM_RPS_EVENTS);
 482         dev_priv->gt_pm.rps.pm_iir = 0;
 483         spin_unlock_irq(&dev_priv->irq_lock);
 484 }
 485
 486 void gen6_enable_rps_interrupts(struct drm_i915_private *dev_priv)
 487 {
 488         struct intel_rps *rps = &dev_priv->gt_pm.rps;
 489
 490         if (READ_ONCE(rps->interrupts_enabled))
 491                 return;
 492
 493         spin_lock_irq(&dev_priv->irq_lock);
 494         WARN_ON_ONCE(rps->pm_iir);
 495
 496         if (INTEL_GEN(dev_priv) >= 11)
 497                 WARN_ON_ONCE(gen11_reset_one_iir(dev_priv, 0, GEN11_GTPM));
 498         else
 499                 WARN_ON_ONCE(I915_READ(gen6_pm_iir(dev_priv)) & dev_priv->pm_rps_events);
 500
 501         rps->interrupts_enabled = true;
 502         gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
 503
 504         spin_unlock_irq(&dev_priv->irq_lock);
 505 }
 506
 507 void gen6_disable_rps_interrupts(struct drm_i915_private *dev_priv)
 508 {
 509         struct intel_rps *rps = &dev_priv->gt_pm.rps;
 510
 511         if (!READ_ONCE(rps->interrupts_enabled))
 512                 return;
 513
 514         spin_lock_irq(&dev_priv->irq_lock);
 515         rps->interrupts_enabled = false;
 516
 517         I915_WRITE(GEN6_PMINTRMSK, gen6_sanitize_rps_pm_mask(dev_priv, ~0u));
 518
 519         gen6_disable_pm_irq(dev_priv, GEN6_PM_RPS_EVENTS);
 520
 521         spin_unlock_irq(&dev_priv->irq_lock);
 522         synchronize_irq(dev_priv->drm.irq);
 523
 524         /* Now that we will not be generating any more work, flush any
 525          * outstanding tasks. As we are called on the RPS idle path,
 526          * we will reset the GPU to minimum frequencies, so the current
 527          * state of the worker can be discarded.
 528          */
 529         cancel_work_sync(&rps->work);
 530         if (INTEL_GEN(dev_priv) >= 11)
 531                 gen11_reset_rps_interrupts(dev_priv);
 532         else
 533                 gen6_reset_rps_interrupts(dev_priv);
 534 }
 535
 536 void gen9_reset_guc_interrupts(struct drm_i915_private *dev_priv)
 537 {
 538         assert_rpm_wakelock_held(dev_priv);
 539
 540         spin_lock_irq(&dev_priv->irq_lock);
 541         gen6_reset_pm_iir(dev_priv, dev_priv->pm_guc_events);
 542         spin_unlock_irq(&dev_priv->irq_lock);
 543 }
 544
 545 void gen9_enable_guc_interrupts(struct drm_i915_private *dev_priv)
 546 {
 547         assert_rpm_wakelock_held(dev_priv);
 548
 549         spin_lock_irq(&dev_priv->irq_lock);
 550         if (!dev_priv->guc.interrupts_enabled) {
 551                 WARN_ON_ONCE(I915_READ(gen6_pm_iir(dev_priv)) &
 552                                        dev_priv->pm_guc_events);
 553                 dev_priv->guc.interrupts_enabled = true;
 554                 gen6_enable_pm_irq(dev_priv, dev_priv->pm_guc_events);
 555         }
 556         spin_unlock_irq(&dev_priv->irq_lock);
 557 }
 558
 559 void gen9_disable_guc_interrupts(struct drm_i915_private *dev_priv)
 560 {
 561         assert_rpm_wakelock_held(dev_priv);
 562
 563         spin_lock_irq(&dev_priv->irq_lock);
 564         dev_priv->guc.interrupts_enabled = false;
 565
 566         gen6_disable_pm_irq(dev_priv, dev_priv->pm_guc_events);
 567
 568         spin_unlock_irq(&dev_priv->irq_lock);
 569         synchronize_irq(dev_priv->drm.irq);
 570
 571         gen9_reset_guc_interrupts(dev_priv);
 572 }
 573
 574 /**
 575  * bdw_update_port_irq - update DE port interrupt
 576  * @dev_priv: driver private
 577  * @interrupt_mask: mask of interrupt bits to update
 578  * @enabled_irq_mask: mask of interrupt bits to enable
 579  */
 580 static void bdw_update_port_irq(struct drm_i915_private *dev_priv,
 581                                 uint32_t interrupt_mask,
 582                                 uint32_t enabled_irq_mask)
 583 {
 584         uint32_t new_val;
 585         uint32_t old_val;
 586
 587         lockdep_assert_held(&dev_priv->irq_lock);
 588
 589         WARN_ON(enabled_irq_mask & ~interrupt_mask);
 590
 591         if (WARN_ON(!intel_irqs_enabled(dev_priv)))
 592                 return;
 593
 594         old_val = I915_READ(GEN8_DE_PORT_IMR);
 595
 596         new_val = old_val;
 597         new_val &= ~interrupt_mask;
 598         new_val |= (~enabled_irq_mask & interrupt_mask);
 599
 600         if (new_val != old_val) {
 601                 I915_WRITE(GEN8_DE_PORT_IMR, new_val);
 602                 POSTING_READ(GEN8_DE_PORT_IMR);
 603         }
 604 }
 605
 606 /**
 607  * bdw_update_pipe_irq - update DE pipe interrupt
 608  * @dev_priv: driver private
 609  * @pipe: pipe whose interrupt to update
 610  * @interrupt_mask: mask of interrupt bits to update
 611  * @enabled_irq_mask: mask of interrupt bits to enable
 612  */
 613 void bdw_update_pipe_irq(struct drm_i915_private *dev_priv,
 614                          enum pipe pipe,
 615                          uint32_t interrupt_mask,
 616                          uint32_t enabled_irq_mask)
 617 {
 618         uint32_t new_val;
 619
 620         lockdep_assert_held(&dev_priv->irq_lock);
 621
 622         WARN_ON(enabled_irq_mask & ~interrupt_mask);
 623
 624         if (WARN_ON(!intel_irqs_enabled(dev_priv)))
 625                 return;
 626
 627         new_val = dev_priv->de_irq_mask[pipe];
 628         new_val &= ~interrupt_mask;
 629         new_val |= (~enabled_irq_mask & interrupt_mask);
 630
 631         if (new_val != dev_priv->de_irq_mask[pipe]) {
 632                 dev_priv->de_irq_mask[pipe] = new_val;
 633                 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
 634                 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
 635         }
 636 }
 637
 638 /**
 639  * ibx_display_interrupt_update - update SDEIMR
 640  * @dev_priv: driver private
 641  * @interrupt_mask: mask of interrupt bits to update
 642  * @enabled_irq_mask: mask of interrupt bits to enable
 643  */
 644 void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
 645                                   uint32_t interrupt_mask,
 646                                   uint32_t enabled_irq_mask)
 647 {
 648         uint32_t sdeimr = I915_READ(SDEIMR);
 649         sdeimr &= ~interrupt_mask;
 650         sdeimr |= (~enabled_irq_mask & interrupt_mask);
 651
 652         WARN_ON(enabled_irq_mask & ~interrupt_mask);
 653
 654         lockdep_assert_held(&dev_priv->irq_lock);
 655
 656         if (WARN_ON(!intel_irqs_enabled(dev_priv)))
 657                 return;
 658
 659         I915_WRITE(SDEIMR, sdeimr);
 660         POSTING_READ(SDEIMR);
 661 }
 662
 663 u32 i915_pipestat_enable_mask(struct drm_i915_private *dev_priv,
 664                               enum pipe pipe)
 665 {
 666         u32 status_mask = dev_priv->pipestat_irq_mask[pipe];
 667         u32 enable_mask = status_mask << 16;
 668
 669         lockdep_assert_held(&dev_priv->irq_lock);
 670
 671         if (INTEL_GEN(dev_priv) < 5)
 672                 goto out;
 673
 674         /*
 675          * On pipe A we don't support the PSR interrupt yet,
 676          * on pipe B and C the same bit MBZ.
 677          */
 678         if (WARN_ON_ONCE(status_mask & PIPE_A_PSR_STATUS_VLV))
 679                 return 0;
 680         /*
 681          * On pipe B and C we don't support the PSR interrupt yet, on pipe
 682          * A the same bit is for perf counters which we don't use either.
 683          */
 684         if (WARN_ON_ONCE(status_mask & PIPE_B_PSR_STATUS_VLV))
 685                 return 0;
 686
 687         enable_mask &= ~(PIPE_FIFO_UNDERRUN_STATUS |
 688                          SPRITE0_FLIP_DONE_INT_EN_VLV |
 689                          SPRITE1_FLIP_DONE_INT_EN_VLV);
 690         if (status_mask & SPRITE0_FLIP_DONE_INT_STATUS_VLV)
 691                 enable_mask |= SPRITE0_FLIP_DONE_INT_EN_VLV;
 692         if (status_mask & SPRITE1_FLIP_DONE_INT_STATUS_VLV)
 693                 enable_mask |= SPRITE1_FLIP_DONE_INT_EN_VLV;
 694
 695 out:
 696         WARN_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
 697                   status_mask & ~PIPESTAT_INT_STATUS_MASK,
 698                   "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
 699                   pipe_name(pipe), enable_mask, status_mask);
 700
 701         return enable_mask;
 702 }
 703
 704 void i915_enable_pipestat(struct drm_i915_private *dev_priv,
 705                           enum pipe pipe, u32 status_mask)
 706 {
 707         i915_reg_t reg = PIPESTAT(pipe);
 708         u32 enable_mask;
 709
 710         WARN_ONCE(status_mask & ~PIPESTAT_INT_STATUS_MASK,
 711                   "pipe %c: status_mask=0x%x\n",
 712                   pipe_name(pipe), status_mask);
 713
 714         lockdep_assert_held(&dev_priv->irq_lock);
 715         WARN_ON(!intel_irqs_enabled(dev_priv));
 716
 717         if ((dev_priv->pipestat_irq_mask[pipe] & status_mask) == status_mask)
 718                 return;
 719
 720         dev_priv->pipestat_irq_mask[pipe] |= status_mask;
 721         enable_mask = i915_pipestat_enable_mask(dev_priv, pipe);
 722
 723         I915_WRITE(reg, enable_mask | status_mask);
 724         POSTING_READ(reg);
 725 }
 726
 727 void i915_disable_pipestat(struct drm_i915_private *dev_priv,
 728                            enum pipe pipe, u32 status_mask)
 729 {
 730         i915_reg_t reg = PIPESTAT(pipe);
 731         u32 enable_mask;
 732
 733         WARN_ONCE(status_mask & ~PIPESTAT_INT_STATUS_MASK,
 734                   "pipe %c: status_mask=0x%x\n",
 735                   pipe_name(pipe), status_mask);
 736
 737         lockdep_assert_held(&dev_priv->irq_lock);
 738         WARN_ON(!intel_irqs_enabled(dev_priv));
 739
 740         if ((dev_priv->pipestat_irq_mask[pipe] & status_mask) == 0)
 741                 return;
 742
 743         dev_priv->pipestat_irq_mask[pipe] &= ~status_mask;
 744         enable_mask = i915_pipestat_enable_mask(dev_priv, pipe);
 745
 746         I915_WRITE(reg, enable_mask | status_mask);
 747         POSTING_READ(reg);
 748 }
 749
 750 /**
 751  * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
 752  * @dev_priv: i915 device private
 753  */
 754 static void i915_enable_asle_pipestat(struct drm_i915_private *dev_priv)
 755 {
 756         if (!dev_priv->opregion.asle || !IS_MOBILE(dev_priv))
 757                 return;
 758
 759         spin_lock_irq(&dev_priv->irq_lock);
 760
 761         i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_STATUS);
 762         if (INTEL_GEN(dev_priv) >= 4)
 763                 i915_enable_pipestat(dev_priv, PIPE_A,
 764                                      PIPE_LEGACY_BLC_EVENT_STATUS);
 765
 766         spin_unlock_irq(&dev_priv->irq_lock);
 767 }
 768
 769 /*
 770  * This timing diagram depicts the video signal in and
 771  * around the vertical blanking period.
 772  *
 773  * Assumptions about the fictitious mode used in this example:
 774  *  vblank_start >= 3
 775  *  vsync_start = vblank_start + 1
 776  *  vsync_end = vblank_start + 2
 777  *  vtotal = vblank_start + 3
 778  *
 779  *           start of vblank:
 780  *           latch double buffered registers
 781  *           increment frame counter (ctg+)
 782  *           generate start of vblank interrupt (gen4+)
 783  *           |
 784  *           |          frame start:
 785  *           |          generate frame start interrupt (aka. vblank interrupt) (gmch)
 786  *           |          may be shifted forward 1-3 extra lines via PIPECONF
 787  *           |          |
 788  *           |          |  start of vsync:
 789  *           |          |  generate vsync interrupt
 790  *           |          |  |
 791  * ___xxxx___    ___xxxx___    ___xxxx___    ___xxxx___    ___xxxx___    ___xxxx
 792  *       .   \hs/   .      \hs/          \hs/          \hs/   .      \hs/
 793  * ----va---> <-----------------vb--------------------> <--------va-------------
 794  *       |          |       <----vs----->                     |
 795  * -vbs-----> <---vbs+1---> <---vbs+2---> <-----0-----> <-----1-----> <-----2--- (scanline counter gen2)
 796  * -vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2---> <-----0--- (scanline counter gen3+)
 797  * -vbs-2---> <---vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2- (scanline counter hsw+ hdmi)
 798  *       |          |                                         |
 799  *       last visible pixel                                   first visible pixel
 800  *                  |                                         increment frame counter (gen3/4)
 801  *                  pixel counter = vblank_start * htotal     pixel counter = 0 (gen3/4)
 802  *
 803  * x  = horizontal active
 804  * _  = horizontal blanking
 805  * hs = horizontal sync
 806  * va = vertical active
 807  * vb = vertical blanking
 808  * vs = vertical sync
 809  * vbs = vblank_start (number)
 810  *
 811  * Summary:
 812  * - most events happen at the start of horizontal sync
 813  * - frame start happens at the start of horizontal blank, 1-4 lines
 814  *   (depending on PIPECONF settings) after the start of vblank
 815  * - gen3/4 pixel and frame counter are synchronized with the start
 816  *   of horizontal active on the first line of vertical active
 817  */
 818
 819 /* Called from drm generic code, passed a 'crtc', which
 820  * we use as a pipe index
 821  */
 822 static u32 i915_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
 823 {
 824         struct drm_i915_private *dev_priv = to_i915(dev);
 825         i915_reg_t high_frame, low_frame;
 826         u32 high1, high2, low, pixel, vbl_start, hsync_start, htotal;
 827         const struct drm_display_mode *mode = &dev->vblank[pipe].hwmode;
 828         unsigned long irqflags;
 829
 830         htotal = mode->crtc_htotal;
 831         hsync_start = mode->crtc_hsync_start;
 832         vbl_start = mode->crtc_vblank_start;
 833         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 834                 vbl_start = DIV_ROUND_UP(vbl_start, 2);
 835
 836         /* Convert to pixel count */
 837         vbl_start *= htotal;
 838
 839         /* Start of vblank event occurs at start of hsync */
 840         vbl_start -= htotal - hsync_start;
 841
 842         high_frame = PIPEFRAME(pipe);
 843         low_frame = PIPEFRAMEPIXEL(pipe);
 844
 845         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 846
 847         /*
 848          * High & low register fields aren't synchronized, so make sure
 849          * we get a low value that's stable across two reads of the high
 850          * register.
 851          */
 852         do {
 853                 high1 = I915_READ_FW(high_frame) & PIPE_FRAME_HIGH_MASK;
 854                 low   = I915_READ_FW(low_frame);
 855                 high2 = I915_READ_FW(high_frame) & PIPE_FRAME_HIGH_MASK;
 856         } while (high1 != high2);
 857
 858         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 859
 860         high1 >>= PIPE_FRAME_HIGH_SHIFT;
 861         pixel = low & PIPE_PIXEL_MASK;
 862         low >>= PIPE_FRAME_LOW_SHIFT;
 863
 864         /*
 865          * The frame counter increments at beginning of active.
 866          * Cook up a vblank counter by also checking the pixel
 867          * counter against vblank start.
 868          */
 869         return (((high1 << 8) | low) + (pixel >= vbl_start)) & 0xffffff;
 870 }
 871
 872 static u32 g4x_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
 873 {
 874         struct drm_i915_private *dev_priv = to_i915(dev);
 875
 876         return I915_READ(PIPE_FRMCOUNT_G4X(pipe));
 877 }
 878
 879 /*
 880  * On certain encoders on certain platforms, pipe
 881  * scanline register will not work to get the scanline,
 882  * since the timings are driven from the PORT or issues
 883  * with scanline register updates.
 884  * This function will use Framestamp and current
 885  * timestamp registers to calculate the scanline.
 886  */
 887 static u32 __intel_get_crtc_scanline_from_timestamp(struct intel_crtc *crtc)
 888 {
 889         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 890         struct drm_vblank_crtc *vblank =
 891                 &crtc->base.dev->vblank[drm_crtc_index(&crtc->base)];
 892         const struct drm_display_mode *mode = &vblank->hwmode;
 893         u32 vblank_start = mode->crtc_vblank_start;
 894         u32 vtotal = mode->crtc_vtotal;
 895         u32 htotal = mode->crtc_htotal;
 896         u32 clock = mode->crtc_clock;
 897         u32 scanline, scan_prev_time, scan_curr_time, scan_post_time;
 898
 899         /*
 900          * To avoid the race condition where we might cross into the
 901          * next vblank just between the PIPE_FRMTMSTMP and TIMESTAMP_CTR
 902          * reads. We make sure we read PIPE_FRMTMSTMP and TIMESTAMP_CTR
 903          * during the same frame.
 904          */
 905         do {
 906                 /*
 907                  * This field provides read back of the display
 908                  * pipe frame time stamp. The time stamp value
 909                  * is sampled at every start of vertical blank.
 910                  */
 911                 scan_prev_time = I915_READ_FW(PIPE_FRMTMSTMP(crtc->pipe));
 912
 913                 /*
 914                  * The TIMESTAMP_CTR register has the current
 915                  * time stamp value.
 916                  */
 917                 scan_curr_time = I915_READ_FW(IVB_TIMESTAMP_CTR);
 918
 919                 scan_post_time = I915_READ_FW(PIPE_FRMTMSTMP(crtc->pipe));
 920         } while (scan_post_time != scan_prev_time);
 921
 922         scanline = div_u64(mul_u32_u32(scan_curr_time - scan_prev_time,
 923                                         clock), 1000 * htotal);
 924         scanline = min(scanline, vtotal - 1);
 925         scanline = (scanline + vblank_start) % vtotal;
 926
 927         return scanline;
 928 }
 929
 930 /* I915_READ_FW, only for fast reads of display block, no need for forcewake etc. */
 931 static int __intel_get_crtc_scanline(struct intel_crtc *crtc)
 932 {
 933         struct drm_device *dev = crtc->base.dev;
 934         struct drm_i915_private *dev_priv = to_i915(dev);
 935         const struct drm_display_mode *mode;
 936         struct drm_vblank_crtc *vblank;
 937         enum pipe pipe = crtc->pipe;
 938         int position, vtotal;
 939
 940         if (!crtc->active)
 941                 return -1;
 942
 943         vblank = &crtc->base.dev->vblank[drm_crtc_index(&crtc->base)];
 944         mode = &vblank->hwmode;
 945
 946         if (mode->private_flags & I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP)
 947                 return __intel_get_crtc_scanline_from_timestamp(crtc);
 948
 949         vtotal = mode->crtc_vtotal;
 950         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 951                 vtotal /= 2;
 952
 953         if (IS_GEN2(dev_priv))
 954                 position = I915_READ_FW(PIPEDSL(pipe)) & DSL_LINEMASK_GEN2;
 955         else
 956                 position = I915_READ_FW(PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
 957
 958         /*
 959          * On HSW, the DSL reg (0x70000) appears to return 0 if we
 960          * read it just before the start of vblank.  So try it again
 961          * so we don't accidentally end up spanning a vblank frame
 962          * increment, causing the pipe_update_end() code to squak at us.
 963          *
 964          * The nature of this problem means we can't simply check the ISR
 965          * bit and return the vblank start value; nor can we use the scanline
 966          * debug register in the transcoder as it appears to have the same
 967          * problem.  We may need to extend this to include other platforms,
 968          * but so far testing only shows the problem on HSW.
 969          */
 970         if (HAS_DDI(dev_priv) && !position) {
 971                 int i, temp;
 972
 973                 for (i = 0; i < 100; i++) {
 974                         udelay(1);
 975                         temp = I915_READ_FW(PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
 976                         if (temp != position) {
 977                                 position = temp;
 978                                 break;
 979                         }
 980                 }
 981         }
 982
 983         /*
 984          * See update_scanline_offset() for the details on the
 985          * scanline_offset adjustment.
 986          */
 987         return (position + crtc->scanline_offset) % vtotal;
 988 }
 989
 990 static bool i915_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe,
 991                                      bool in_vblank_irq, int *vpos, int *hpos,
 992                                      ktime_t *stime, ktime_t *etime,
 993                                      const struct drm_display_mode *mode)
 994 {
 995         struct drm_i915_private *dev_priv = to_i915(dev);
 996         struct intel_crtc *intel_crtc = intel_get_crtc_for_pipe(dev_priv,
 997                                                                 pipe);
 998         int position;
 999         int vbl_start, vbl_end, hsync_start, htotal, vtotal;
1000         unsigned long irqflags;
1001
1002         if (WARN_ON(!mode->crtc_clock)) {
1003                 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
1004                                  "pipe %c\n", pipe_name(pipe));
1005                 return false;
1006         }
1007
1008         htotal = mode->crtc_htotal;
1009         hsync_start = mode->crtc_hsync_start;
1010         vtotal = mode->crtc_vtotal;
1011         vbl_start = mode->crtc_vblank_start;
1012         vbl_end = mode->crtc_vblank_end;
1013
1014         if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
1015                 vbl_start = DIV_ROUND_UP(vbl_start, 2);
1016                 vbl_end /= 2;
1017                 vtotal /= 2;
1018         }
1019
1020         /*
1021          * Lock uncore.lock, as we will do multiple timing critical raw
1022          * register reads, potentially with preemption disabled, so the
1023          * following code must not block on uncore.lock.
1024          */
1025         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
1026
1027         /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
1028
1029         /* Get optional system timestamp before query. */
1030         if (stime)
1031                 *stime = ktime_get();
1032
1033         if (IS_GEN2(dev_priv) || IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5) {
1034                 /* No obvious pixelcount register. Only query vertical
1035                  * scanout position from Display scan line register.
1036                  */
1037                 position = __intel_get_crtc_scanline(intel_crtc);
1038         } else {
1039                 /* Have access to pixelcount since start of frame.
1040                  * We can split this into vertical and horizontal
1041                  * scanout position.
1042                  */
1043                 position = (I915_READ_FW(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
1044
1045                 /* convert to pixel counts */
1046                 vbl_start *= htotal;
1047                 vbl_end *= htotal;
1048                 vtotal *= htotal;
1049
1050                 /*
1051                  * In interlaced modes, the pixel counter counts all pixels,
1052                  * so one field will have htotal more pixels. In order to avoid
1053                  * the reported position from jumping backwards when the pixel
1054                  * counter is beyond the length of the shorter field, just
1055                  * clamp the position the length of the shorter field. This
1056                  * matches how the scanline counter based position works since
1057                  * the scanline counter doesn't count the two half lines.
1058                  */
1059                 if (position >= vtotal)
1060                         position = vtotal - 1;
1061
1062                 /*
1063                  * Start of vblank interrupt is triggered at start of hsync,
1064                  * just prior to the first active line of vblank. However we
1065                  * consider lines to start at the leading edge of horizontal
1066                  * active. So, should we get here before we've crossed into
1067                  * the horizontal active of the first line in vblank, we would
1068                  * not set the DRM_SCANOUTPOS_INVBL flag. In order to fix that,
1069                  * always add htotal-hsync_start to the current pixel position.
1070                  */
1071                 position = (position + htotal - hsync_start) % vtotal;
1072         }
1073
1074         /* Get optional system timestamp after query. */
1075         if (etime)
1076                 *etime = ktime_get();
1077
1078         /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
1079
1080         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
1081
1082         /*
1083          * While in vblank, position will be negative
1084          * counting up towards 0 at vbl_end. And outside
1085          * vblank, position will be positive counting
1086          * up since vbl_end.
1087          */
1088         if (position >= vbl_start)
1089                 position -= vbl_end;
1090         else
1091                 position += vtotal - vbl_end;
1092
1093         if (IS_GEN2(dev_priv) || IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5) {
1094                 *vpos = position;
1095                 *hpos = 0;
1096         } else {
1097                 *vpos = position / htotal;
1098                 *hpos = position - (*vpos * htotal);
1099         }
1100
1101         return true;
1102 }
1103
1104 int intel_get_crtc_scanline(struct intel_crtc *crtc)
1105 {
1106         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1107         unsigned long irqflags;
1108         int position;
1109
1110         spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
1111         position = __intel_get_crtc_scanline(crtc);
1112         spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
1113
1114         return position;
1115 }
1116
1117 static void ironlake_rps_change_irq_handler(struct drm_i915_private *dev_priv)
1118 {
1119         u32 busy_up, busy_down, max_avg, min_avg;
1120         u8 new_delay;
1121
1122         spin_lock(&mchdev_lock);
1123
1124         I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
1125
1126         new_delay = dev_priv->ips.cur_delay;
1127
1128         I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
1129         busy_up = I915_READ(RCPREVBSYTUPAVG);
1130         busy_down = I915_READ(RCPREVBSYTDNAVG);
1131         max_avg = I915_READ(RCBMAXAVG);
1132         min_avg = I915_READ(RCBMINAVG);
1133
1134         /* Handle RCS change request from hw */
1135         if (busy_up > max_avg) {
1136                 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
1137                         new_delay = dev_priv->ips.cur_delay - 1;
1138                 if (new_delay < dev_priv->ips.max_delay)
1139                         new_delay = dev_priv->ips.max_delay;
1140         } else if (busy_down < min_avg) {
1141                 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
1142                         new_delay = dev_priv->ips.cur_delay + 1;
1143                 if (new_delay > dev_priv->ips.min_delay)
1144                         new_delay = dev_priv->ips.min_delay;
1145         }
1146
1147         if (ironlake_set_drps(dev_priv, new_delay))
1148                 dev_priv->ips.cur_delay = new_delay;
1149
1150         spin_unlock(&mchdev_lock);
1151
1152         return;
1153 }
1154
1155 static void notify_ring(struct intel_engine_cs *engine)
1156 {
1157         const u32 seqno = intel_engine_get_seqno(engine);
1158         struct i915_request *rq = NULL;
1159         struct task_struct *tsk = NULL;
1160         struct intel_wait *wait;
1161
1162         if (unlikely(!engine->breadcrumbs.irq_armed))
1163                 return;
1164
1165         rcu_read_lock();
1166
1167         spin_lock(&engine->breadcrumbs.irq_lock);
1168         wait = engine->breadcrumbs.irq_wait;
1169         if (wait) {
1170                 /*
1171                  * We use a callback from the dma-fence to submit
1172                  * requests after waiting on our own requests. To
1173                  * ensure minimum delay in queuing the next request to
1174                  * hardware, signal the fence now rather than wait for
1175                  * the signaler to be woken up. We still wake up the
1176                  * waiter in order to handle the irq-seqno coherency
1177                  * issues (we may receive the interrupt before the
1178                  * seqno is written, see __i915_request_irq_complete())
1179                  * and to handle coalescing of multiple seqno updates
1180                  * and many waiters.
1181                  */
1182                 if (i915_seqno_passed(seqno, wait->seqno)) {
1183                         struct i915_request *waiter = wait->request;
1184
1185                         if (waiter &&
1186                             !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
1187                                       &waiter->fence.flags) &&
1188                             intel_wait_check_request(wait, waiter))
1189                                 rq = i915_request_get(waiter);
1190
1191                         tsk = wait->tsk;
1192                 } else {
1193                         if (engine->irq_seqno_barrier &&
1194                             i915_seqno_passed(seqno, wait->seqno - 1)) {
1195                                 set_bit(ENGINE_IRQ_BREADCRUMB,
1196                                         &engine->irq_posted);
1197                                 tsk = wait->tsk;
1198                         }
1199                 }
1200
1201                 engine->breadcrumbs.irq_count++;
1202         } else {
1203                 if (engine->breadcrumbs.irq_armed)
1204                         __intel_engine_disarm_breadcrumbs(engine);
1205         }
1206         spin_unlock(&engine->breadcrumbs.irq_lock);
1207
1208         if (rq) {
1209                 spin_lock(&rq->lock);
1210                 dma_fence_signal_locked(&rq->fence);
1211                 GEM_BUG_ON(!i915_request_completed(rq));
1212                 spin_unlock(&rq->lock);
1213
1214                 i915_request_put(rq);
1215         }
1216
1217         if (tsk && tsk->state & TASK_NORMAL)
1218                 wake_up_process(tsk);
1219
1220         rcu_read_unlock();
1221
1222         trace_intel_engine_notify(engine, wait);
1223 }
1224
1225 static void vlv_c0_read(struct drm_i915_private *dev_priv,
1226                         struct intel_rps_ei *ei)
1227 {
1228         ei->ktime = ktime_get_raw();
1229         ei->render_c0 = I915_READ(VLV_RENDER_C0_COUNT);
1230         ei->media_c0 = I915_READ(VLV_MEDIA_C0_COUNT);
1231 }
1232
1233 void gen6_rps_reset_ei(struct drm_i915_private *dev_priv)
1234 {
1235         memset(&dev_priv->gt_pm.rps.ei, 0, sizeof(dev_priv->gt_pm.rps.ei));
1236 }
1237
1238 static u32 vlv_wa_c0_ei(struct drm_i915_private *dev_priv, u32 pm_iir)
1239 {
1240         struct intel_rps *rps = &dev_priv->gt_pm.rps;
1241         const struct intel_rps_ei *prev = &rps->ei;
1242         struct intel_rps_ei now;
1243         u32 events = 0;
1244
1245         if ((pm_iir & GEN6_PM_RP_UP_EI_EXPIRED) == 0)
1246                 return 0;
1247
1248         vlv_c0_read(dev_priv, &now);
1249
1250         if (prev->ktime) {
1251                 u64 time, c0;
1252                 u32 render, media;
1253
1254                 time = ktime_us_delta(now.ktime, prev->ktime);
1255
1256                 time *= dev_priv->czclk_freq;
1257
1258                 /* Workload can be split between render + media,
1259                  * e.g. SwapBuffers being blitted in X after being rendered in
1260                  * mesa. To account for this we need to combine both engines
1261                  * into our activity counter.
1262                  */
1263                 render = now.render_c0 - prev->render_c0;
1264                 media = now.media_c0 - prev->media_c0;
1265                 c0 = max(render, media);
1266                 c0 *= 1000 * 100 << 8; /* to usecs and scale to threshold% */
1267
1268                 if (c0 > time * rps->power.up_threshold)
1269                         events = GEN6_PM_RP_UP_THRESHOLD;
1270                 else if (c0 < time * rps->power.down_threshold)
1271                         events = GEN6_PM_RP_DOWN_THRESHOLD;
1272         }
1273
1274         rps->ei = now;
1275         return events;
1276 }
1277
1278 static void gen6_pm_rps_work(struct work_struct *work)
1279 {
1280         struct drm_i915_private *dev_priv =
1281                 container_of(work, struct drm_i915_private, gt_pm.rps.work);
1282         struct intel_rps *rps = &dev_priv->gt_pm.rps;
1283         bool client_boost = false;
1284         int new_delay, adj, min, max;
1285         u32 pm_iir = 0;
1286
1287         spin_lock_irq(&dev_priv->irq_lock);
1288         if (rps->interrupts_enabled) {
1289                 pm_iir = fetch_and_zero(&rps->pm_iir);
1290                 client_boost = atomic_read(&rps->num_waiters);
1291         }
1292         spin_unlock_irq(&dev_priv->irq_lock);
1293
1294         /* Make sure we didn't queue anything we're not going to process. */
1295         WARN_ON(pm_iir & ~dev_priv->pm_rps_events);
1296         if ((pm_iir & dev_priv->pm_rps_events) == 0 && !client_boost)
1297                 goto out;
1298
1299         mutex_lock(&dev_priv->pcu_lock);
1300
1301         pm_iir |= vlv_wa_c0_ei(dev_priv, pm_iir);
1302
1303         adj = rps->last_adj;
1304         new_delay = rps->cur_freq;
1305         min = rps->min_freq_softlimit;
1306         max = rps->max_freq_softlimit;
1307         if (client_boost)
1308                 max = rps->max_freq;
1309         if (client_boost && new_delay < rps->boost_freq) {
1310                 new_delay = rps->boost_freq;
1311                 adj = 0;
1312         } else if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
1313                 if (adj > 0)
1314                         adj *= 2;
1315                 else /* CHV needs even encode values */
1316                         adj = IS_CHERRYVIEW(dev_priv) ? 2 : 1;
1317
1318                 if (new_delay >= rps->max_freq_softlimit)
1319                         adj = 0;
1320         } else if (client_boost) {
1321                 adj = 0;
1322         } else if (pm_iir & GEN6_PM_RP_DOWN_TIMEOUT) {
1323                 if (rps->cur_freq > rps->efficient_freq)
1324                         new_delay = rps->efficient_freq;
1325                 else if (rps->cur_freq > rps->min_freq_softlimit)
1326                         new_delay = rps->min_freq_softlimit;
1327                 adj = 0;
1328         } else if (pm_iir & GEN6_PM_RP_DOWN_THRESHOLD) {
1329                 if (adj < 0)
1330                         adj *= 2;
1331                 else /* CHV needs even encode values */
1332                         adj = IS_CHERRYVIEW(dev_priv) ? -2 : -1;
1333
1334                 if (new_delay <= rps->min_freq_softlimit)
1335                         adj = 0;
1336         } else { /* unknown event */
1337                 adj = 0;
1338         }
1339
1340         rps->last_adj = adj;
1341
1342         /* sysfs frequency interfaces may have snuck in while servicing the
1343          * interrupt
1344          */
1345         new_delay += adj;
1346         new_delay = clamp_t(int, new_delay, min, max);
1347
1348         if (intel_set_rps(dev_priv, new_delay)) {
1349                 DRM_DEBUG_DRIVER("Failed to set new GPU frequency\n");
1350                 rps->last_adj = 0;
1351         }
1352
1353         mutex_unlock(&dev_priv->pcu_lock);
1354
1355 out:
1356         /* Make sure not to corrupt PMIMR state used by ringbuffer on GEN6 */
1357         spin_lock_irq(&dev_priv->irq_lock);
1358         if (rps->interrupts_enabled)
1359                 gen6_unmask_pm_irq(dev_priv, dev_priv->pm_rps_events);
1360         spin_unlock_irq(&dev_priv->irq_lock);
1361 }
1362
1363
1364 /**
1365  * ivybridge_parity_work - Workqueue called when a parity error interrupt
1366  * occurred.
1367  * @work: workqueue struct
1368  *
1369  * Doesn't actually do anything except notify userspace. As a consequence of
1370  * this event, userspace should try to remap the bad rows since statistically
1371  * it is likely the same row is more likely to go bad again.
1372  */
1373 static void ivybridge_parity_work(struct work_struct *work)
1374 {
1375         struct drm_i915_private *dev_priv =
1376                 container_of(work, typeof(*dev_priv), l3_parity.error_work);
1377         u32 error_status, row, bank, subbank;
1378         char *parity_event[6];
1379         uint32_t misccpctl;
1380         uint8_t slice = 0;
1381
1382         /* We must turn off DOP level clock gating to access the L3 registers.
1383          * In order to prevent a get/put style interface, acquire struct mutex
1384          * any time we access those registers.
1385          */
1386         mutex_lock(&dev_priv->drm.struct_mutex);
1387
1388         /* If we've screwed up tracking, just let the interrupt fire again */
1389         if (WARN_ON(!dev_priv->l3_parity.which_slice))
1390                 goto out;
1391
1392         misccpctl = I915_READ(GEN7_MISCCPCTL);
1393         I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
1394         POSTING_READ(GEN7_MISCCPCTL);
1395
1396         while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) {
1397                 i915_reg_t reg;
1398
1399                 slice--;
1400                 if (WARN_ON_ONCE(slice >= NUM_L3_SLICES(dev_priv)))
1401                         break;
1402
1403                 dev_priv->l3_parity.which_slice &= ~(1<<slice);
1404
1405                 reg = GEN7_L3CDERRST1(slice);
1406
1407                 error_status = I915_READ(reg);
1408                 row = GEN7_PARITY_ERROR_ROW(error_status);
1409                 bank = GEN7_PARITY_ERROR_BANK(error_status);
1410                 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
1411
1412                 I915_WRITE(reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE);
1413                 POSTING_READ(reg);
1414
1415                 parity_event[0] = I915_L3_PARITY_UEVENT "=1";
1416                 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
1417                 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
1418                 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
1419                 parity_event[4] = kasprintf(GFP_KERNEL, "SLICE=%d", slice);
1420                 parity_event[5] = NULL;
1421
1422                 kobject_uevent_env(&dev_priv->drm.primary->kdev->kobj,
1423                                    KOBJ_CHANGE, parity_event);
1424
1425                 DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n",
1426                           slice, row, bank, subbank);
1427
1428                 kfree(parity_event[4]);
1429                 kfree(parity_event[3]);
1430                 kfree(parity_event[2]);
1431                 kfree(parity_event[1]);
1432         }
1433
1434         I915_WRITE(GEN7_MISCCPCTL, misccpctl);
1435
1436 out:
1437         WARN_ON(dev_priv->l3_parity.which_slice);
1438         spin_lock_irq(&dev_priv->irq_lock);
1439         gen5_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv));
1440         spin_unlock_irq(&dev_priv->irq_lock);
1441
1442         mutex_unlock(&dev_priv->drm.struct_mutex);
1443 }
1444
1445 static void ivybridge_parity_error_irq_handler(struct drm_i915_private *dev_priv,
1446                                                u32 iir)
1447 {
1448         if (!HAS_L3_DPF(dev_priv))
1449                 return;
1450
1451         spin_lock(&dev_priv->irq_lock);
1452         gen5_disable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv));
1453         spin_unlock(&dev_priv->irq_lock);
1454
1455         iir &= GT_PARITY_ERROR(dev_priv);
1456         if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1)
1457                 dev_priv->l3_parity.which_slice |= 1 << 1;
1458
1459         if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
1460                 dev_priv->l3_parity.which_slice |= 1 << 0;
1461
1462         queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
1463 }
1464
1465 static void ilk_gt_irq_handler(struct drm_i915_private *dev_priv,
1466                                u32 gt_iir)
1467 {
1468         if (gt_iir & GT_RENDER_USER_INTERRUPT)
1469                 notify_ring(dev_priv->engine[RCS]);
1470         if (gt_iir & ILK_BSD_USER_INTERRUPT)
1471                 notify_ring(dev_priv->engine[VCS]);
1472 }
1473
1474 static void snb_gt_irq_handler(struct drm_i915_private *dev_priv,
1475                                u32 gt_iir)
1476 {
1477         if (gt_iir & GT_RENDER_USER_INTERRUPT)
1478                 notify_ring(dev_priv->engine[RCS]);
1479         if (gt_iir & GT_BSD_USER_INTERRUPT)
1480                 notify_ring(dev_priv->engine[VCS]);
1481         if (gt_iir & GT_BLT_USER_INTERRUPT)
1482                 notify_ring(dev_priv->engine[BCS]);
1483
1484         if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
1485                       GT_BSD_CS_ERROR_INTERRUPT |
1486                       GT_RENDER_CS_MASTER_ERROR_INTERRUPT))
1487                 DRM_DEBUG("Command parser error, gt_iir 0x%08x\n", gt_iir);
1488
1489         if (gt_iir & GT_PARITY_ERROR(dev_priv))
1490                 ivybridge_parity_error_irq_handler(dev_priv, gt_iir);
1491 }
1492
1493 static void
1494 gen8_cs_irq_handler(struct intel_engine_cs *engine, u32 iir)
1495 {
1496         bool tasklet = false;
1497
1498         if (iir & GT_CONTEXT_SWITCH_INTERRUPT)
1499                 tasklet = true;
1500
1501         if (iir & GT_RENDER_USER_INTERRUPT) {
1502                 notify_ring(engine);
1503                 tasklet |= USES_GUC_SUBMISSION(engine->i915);
1504         }
1505
1506         if (tasklet)
1507                 tasklet_hi_schedule(&engine->execlists.tasklet);
1508 }
1509
1510 static void gen8_gt_irq_ack(struct drm_i915_private *i915,
1511                             u32 master_ctl, u32 gt_iir[4])
1512 {
1513         void __iomem * const regs = i915->regs;
1514
1515 #define GEN8_GT_IRQS (GEN8_GT_RCS_IRQ | \
1516                       GEN8_GT_BCS_IRQ | \
1517                       GEN8_GT_VCS1_IRQ | \
1518                       GEN8_GT_VCS2_IRQ | \
1519                       GEN8_GT_VECS_IRQ | \
1520                       GEN8_GT_PM_IRQ | \
1521                       GEN8_GT_GUC_IRQ)
1522
1523         if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
1524                 gt_iir[0] = raw_reg_read(regs, GEN8_GT_IIR(0));
1525                 if (likely(gt_iir[0]))
1526                         raw_reg_write(regs, GEN8_GT_IIR(0), gt_iir[0]);
1527         }
1528
1529         if (master_ctl & (GEN8_GT_VCS1_IRQ | GEN8_GT_VCS2_IRQ)) {
1530                 gt_iir[1] = raw_reg_read(regs, GEN8_GT_IIR(1));
1531                 if (likely(gt_iir[1]))
1532                         raw_reg_write(regs, GEN8_GT_IIR(1), gt_iir[1]);
1533         }
1534
1535         if (master_ctl & (GEN8_GT_PM_IRQ | GEN8_GT_GUC_IRQ)) {
1536                 gt_iir[2] = raw_reg_read(regs, GEN8_GT_IIR(2));
1537                 if (likely(gt_iir[2]))
1538                         raw_reg_write(regs, GEN8_GT_IIR(2), gt_iir[2]);
1539         }
1540
1541         if (master_ctl & GEN8_GT_VECS_IRQ) {
1542                 gt_iir[3] = raw_reg_read(regs, GEN8_GT_IIR(3));
1543                 if (likely(gt_iir[3]))
1544                         raw_reg_write(regs, GEN8_GT_IIR(3), gt_iir[3]);
1545         }
1546 }
1547
1548 static void gen8_gt_irq_handler(struct drm_i915_private *i915,
1549                                 u32 master_ctl, u32 gt_iir[4])
1550 {
1551         if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
1552                 gen8_cs_irq_handler(i915->engine[RCS],
1553                                     gt_iir[0] >> GEN8_RCS_IRQ_SHIFT);
1554                 gen8_cs_irq_handler(i915->engine[BCS],
1555                                     gt_iir[0] >> GEN8_BCS_IRQ_SHIFT);
1556         }
1557
1558         if (master_ctl & (GEN8_GT_VCS1_IRQ | GEN8_GT_VCS2_IRQ)) {
1559                 gen8_cs_irq_handler(i915->engine[VCS],
1560                                     gt_iir[1] >> GEN8_VCS1_IRQ_SHIFT);
1561                 gen8_cs_irq_handler(i915->engine[VCS2],
1562                                     gt_iir[1] >> GEN8_VCS2_IRQ_SHIFT);
1563         }
1564
1565         if (master_ctl & GEN8_GT_VECS_IRQ) {
1566                 gen8_cs_irq_handler(i915->engine[VECS],
1567                                     gt_iir[3] >> GEN8_VECS_IRQ_SHIFT);
1568         }
1569
1570         if (master_ctl & (GEN8_GT_PM_IRQ | GEN8_GT_GUC_IRQ)) {
1571                 gen6_rps_irq_handler(i915, gt_iir[2]);
1572                 gen9_guc_irq_handler(i915, gt_iir[2]);
1573         }
1574 }
1575
1576 static bool gen11_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1577 {
1578         switch (pin) {
1579         case HPD_PORT_C:
1580                 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC1);
1581         case HPD_PORT_D:
1582                 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC2);
1583         case HPD_PORT_E:
1584                 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC3);
1585         case HPD_PORT_F:
1586                 return val & GEN11_HOTPLUG_CTL_LONG_DETECT(PORT_TC4);
1587         default:
1588                 return false;
1589         }
1590 }
1591
1592 static bool bxt_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1593 {
1594         switch (pin) {
1595         case HPD_PORT_A:
1596                 return val & PORTA_HOTPLUG_LONG_DETECT;
1597         case HPD_PORT_B:
1598                 return val & PORTB_HOTPLUG_LONG_DETECT;
1599         case HPD_PORT_C:
1600                 return val & PORTC_HOTPLUG_LONG_DETECT;
1601         default:
1602                 return false;
1603         }
1604 }
1605
1606 static bool icp_ddi_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1607 {
1608         switch (pin) {
1609         case HPD_PORT_A:
1610                 return val & ICP_DDIA_HPD_LONG_DETECT;
1611         case HPD_PORT_B:
1612                 return val & ICP_DDIB_HPD_LONG_DETECT;
1613         default:
1614                 return false;
1615         }
1616 }
1617
1618 static bool icp_tc_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1619 {
1620         switch (pin) {
1621         case HPD_PORT_C:
1622                 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC1);
1623         case HPD_PORT_D:
1624                 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC2);
1625         case HPD_PORT_E:
1626                 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC3);
1627         case HPD_PORT_F:
1628                 return val & ICP_TC_HPD_LONG_DETECT(PORT_TC4);
1629         default:
1630                 return false;
1631         }
1632 }
1633
1634 static bool spt_port_hotplug2_long_detect(enum hpd_pin pin, u32 val)
1635 {
1636         switch (pin) {
1637         case HPD_PORT_E:
1638                 return val & PORTE_HOTPLUG_LONG_DETECT;
1639         default:
1640                 return false;
1641         }
1642 }
1643
1644 static bool spt_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1645 {
1646         switch (pin) {
1647         case HPD_PORT_A:
1648                 return val & PORTA_HOTPLUG_LONG_DETECT;
1649         case HPD_PORT_B:
1650                 return val & PORTB_HOTPLUG_LONG_DETECT;
1651         case HPD_PORT_C:
1652                 return val & PORTC_HOTPLUG_LONG_DETECT;
1653         case HPD_PORT_D:
1654                 return val & PORTD_HOTPLUG_LONG_DETECT;
1655         default:
1656                 return false;
1657         }
1658 }
1659
1660 static bool ilk_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1661 {
1662         switch (pin) {
1663         case HPD_PORT_A:
1664                 return val & DIGITAL_PORTA_HOTPLUG_LONG_DETECT;
1665         default:
1666                 return false;
1667         }
1668 }
1669
1670 static bool pch_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1671 {
1672         switch (pin) {
1673         case HPD_PORT_B:
1674                 return val & PORTB_HOTPLUG_LONG_DETECT;
1675         case HPD_PORT_C:
1676                 return val & PORTC_HOTPLUG_LONG_DETECT;
1677         case HPD_PORT_D:
1678                 return val & PORTD_HOTPLUG_LONG_DETECT;
1679         default:
1680                 return false;
1681         }
1682 }
1683
1684 static bool i9xx_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
1685 {
1686         switch (pin) {
1687         case HPD_PORT_B:
1688                 return val & PORTB_HOTPLUG_INT_LONG_PULSE;
1689         case HPD_PORT_C:
1690                 return val & PORTC_HOTPLUG_INT_LONG_PULSE;
1691         case HPD_PORT_D:
1692                 return val & PORTD_HOTPLUG_INT_LONG_PULSE;
1693         default:
1694                 return false;
1695         }
1696 }
1697
1698 /*
1699  * Get a bit mask of pins that have triggered, and which ones may be long.
1700  * This can be called multiple times with the same masks to accumulate
1701  * hotplug detection results from several registers.
1702  *
1703  * Note that the caller is expected to zero out the masks initially.
1704  */
1705 static void intel_get_hpd_pins(struct drm_i915_private *dev_priv,
1706                                u32 *pin_mask, u32 *long_mask,
1707                                u32 hotplug_trigger, u32 dig_hotplug_reg,
1708                                const u32 hpd[HPD_NUM_PINS],
1709                                bool long_pulse_detect(enum hpd_pin pin, u32 val))
1710 {
1711         enum hpd_pin pin;
1712
1713         for_each_hpd_pin(pin) {
1714                 if ((hpd[pin] & hotplug_trigger) == 0)
1715                         continue;
1716
1717                 *pin_mask |= BIT(pin);
1718
1719                 if (long_pulse_detect(pin, dig_hotplug_reg))
1720                         *long_mask |= BIT(pin);
1721         }
1722
1723         DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x, dig 0x%08x, pins 0x%08x, long 0x%08x\n",
1724                          hotplug_trigger, dig_hotplug_reg, *pin_mask, *long_mask);
1725
1726 }
1727
1728 static void gmbus_irq_handler(struct drm_i915_private *dev_priv)
1729 {
1730         wake_up_all(&dev_priv->gmbus_wait_queue);
1731 }
1732
1733 static void dp_aux_irq_handler(struct drm_i915_private *dev_priv)
1734 {
1735         wake_up_all(&dev_priv->gmbus_wait_queue);
1736 }
1737
1738 #if defined(CONFIG_DEBUG_FS)
1739 static void display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1740                                          enum pipe pipe,
1741                                          uint32_t crc0, uint32_t crc1,
1742                                          uint32_t crc2, uint32_t crc3,
1743                                          uint32_t crc4)
1744 {
1745         struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
1746         struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
1747         uint32_t crcs[5];
1748
1749         spin_lock(&pipe_crc->lock);
1750         /*
1751          * For some not yet identified reason, the first CRC is
1752          * bonkers. So let's just wait for the next vblank and read
1753          * out the buggy result.
1754          *
1755          * On GEN8+ sometimes the second CRC is bonkers as well, so
1756          * don't trust that one either.
1757          */
1758         if (pipe_crc->skipped <= 0 ||
1759             (INTEL_GEN(dev_priv) >= 8 && pipe_crc->skipped == 1)) {
1760                 pipe_crc->skipped++;
1761                 spin_unlock(&pipe_crc->lock);
1762                 return;
1763         }
1764         spin_unlock(&pipe_crc->lock);
1765
1766         crcs[0] = crc0;
1767         crcs[1] = crc1;
1768         crcs[2] = crc2;
1769         crcs[3] = crc3;
1770         crcs[4] = crc4;
1771         drm_crtc_add_crc_entry(&crtc->base, true,
1772                                 drm_crtc_accurate_vblank_count(&crtc->base),
1773                                 crcs);
1774 }
1775 #else
1776 static inline void
1777 display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1778                              enum pipe pipe,
1779                              uint32_t crc0, uint32_t crc1,
1780                              uint32_t crc2, uint32_t crc3,
1781                              uint32_t crc4) {}
1782 #endif
1783
1784
1785 static void hsw_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1786                                      enum pipe pipe)
1787 {
1788         display_pipe_crc_irq_handler(dev_priv, pipe,
1789                                      I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1790                                      0, 0, 0, 0);
1791 }
1792
1793 static void ivb_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1794                                      enum pipe pipe)
1795 {
1796         display_pipe_crc_irq_handler(dev_priv, pipe,
1797                                      I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1798                                      I915_READ(PIPE_CRC_RES_2_IVB(pipe)),
1799                                      I915_READ(PIPE_CRC_RES_3_IVB(pipe)),
1800                                      I915_READ(PIPE_CRC_RES_4_IVB(pipe)),
1801                                      I915_READ(PIPE_CRC_RES_5_IVB(pipe)));
1802 }
1803
1804 static void i9xx_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1805                                       enum pipe pipe)
1806 {
1807         uint32_t res1, res2;
1808
1809         if (INTEL_GEN(dev_priv) >= 3)
1810                 res1 = I915_READ(PIPE_CRC_RES_RES1_I915(pipe));
1811         else
1812                 res1 = 0;
1813
1814         if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
1815                 res2 = I915_READ(PIPE_CRC_RES_RES2_G4X(pipe));
1816         else
1817                 res2 = 0;
1818
1819         display_pipe_crc_irq_handler(dev_priv, pipe,
1820                                      I915_READ(PIPE_CRC_RES_RED(pipe)),
1821                                      I915_READ(PIPE_CRC_RES_GREEN(pipe)),
1822                                      I915_READ(PIPE_CRC_RES_BLUE(pipe)),
1823                                      res1, res2);
1824 }
1825
1826 /* The RPS events need forcewake, so we add them to a work queue and mask their
1827  * IMR bits until the work is done. Other interrupts can be processed without
1828  * the work queue. */
1829 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
1830 {
1831         struct intel_rps *rps = &dev_priv->gt_pm.rps;
1832
1833         if (pm_iir & dev_priv->pm_rps_events) {
1834                 spin_lock(&dev_priv->irq_lock);
1835                 gen6_mask_pm_irq(dev_priv, pm_iir & dev_priv->pm_rps_events);
1836                 if (rps->interrupts_enabled) {
1837                         rps->pm_iir |= pm_iir & dev_priv->pm_rps_events;
1838                         schedule_work(&rps->work);
1839                 }
1840                 spin_unlock(&dev_priv->irq_lock);
1841         }
1842
1843         if (INTEL_GEN(dev_priv) >= 8)
1844                 return;
1845
1846         if (HAS_VEBOX(dev_priv)) {
1847                 if (pm_iir & PM_VEBOX_USER_INTERRUPT)
1848                         notify_ring(dev_priv->engine[VECS]);
1849
1850                 if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT)
1851                         DRM_DEBUG("Command parser error, pm_iir 0x%08x\n", pm_iir);
1852         }
1853 }
1854
1855 static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 gt_iir)
1856 {
1857         if (gt_iir & GEN9_GUC_TO_HOST_INT_EVENT)
1858                 intel_guc_to_host_event_handler(&dev_priv->guc);
1859 }
1860
1861 static void i9xx_pipestat_irq_reset(struct drm_i915_private *dev_priv)
1862 {
1863         enum pipe pipe;
1864
1865         for_each_pipe(dev_priv, pipe) {
1866                 I915_WRITE(PIPESTAT(pipe),
1867                            PIPESTAT_INT_STATUS_MASK |
1868                            PIPE_FIFO_UNDERRUN_STATUS);
1869
1870                 dev_priv->pipestat_irq_mask[pipe] = 0;
1871         }
1872 }
1873
1874 static void i9xx_pipestat_irq_ack(struct drm_i915_private *dev_priv,
1875                                   u32 iir, u32 pipe_stats[I915_MAX_PIPES])
1876 {
1877         int pipe;
1878
1879         spin_lock(&dev_priv->irq_lock);
1880
1881         if (!dev_priv->display_irqs_enabled) {
1882                 spin_unlock(&dev_priv->irq_lock);
1883                 return;
1884         }
1885
1886         for_each_pipe(dev_priv, pipe) {
1887                 i915_reg_t reg;
1888                 u32 status_mask, enable_mask, iir_bit = 0;
1889
1890                 /*
1891                  * PIPESTAT bits get signalled even when the interrupt is
1892                  * disabled with the mask bits, and some of the status bits do
1893                  * not generate interrupts at all (like the underrun bit). Hence
1894                  * we need to be careful that we only handle what we want to
1895                  * handle.
1896                  */
1897
1898                 /* fifo underruns are filterered in the underrun handler. */
1899                 status_mask = PIPE_FIFO_UNDERRUN_STATUS;
1900
1901                 switch (pipe) {
1902                 case PIPE_A:
1903                         iir_bit = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
1904                         break;
1905                 case PIPE_B:
1906                         iir_bit = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
1907                         break;
1908                 case PIPE_C:
1909                         iir_bit = I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
1910                         break;
1911                 }
1912                 if (iir & iir_bit)
1913                         status_mask |= dev_priv->pipestat_irq_mask[pipe];
1914
1915                 if (!status_mask)
1916                         continue;
1917
1918                 reg = PIPESTAT(pipe);
1919                 pipe_stats[pipe] = I915_READ(reg) & status_mask;
1920                 enable_mask = i915_pipestat_enable_mask(dev_priv, pipe);
1921
1922                 /*
1923                  * Clear the PIPE*STAT regs before the IIR
1924                  *
1925                  * Toggle the enable bits to make sure we get an
1926                  * edge in the ISR pipe event bit if we don't clear
1927                  * all the enabled status bits. Otherwise the edge
1928                  * triggered IIR on i965/g4x wouldn't notice that
1929                  * an interrupt is still pending.
1930                  */
1931                 if (pipe_stats[pipe]) {
1932                         I915_WRITE(reg, pipe_stats[pipe]);
1933                         I915_WRITE(reg, enable_mask);
1934                 }
1935         }
1936         spin_unlock(&dev_priv->irq_lock);
1937 }
1938
1939 static void i8xx_pipestat_irq_handler(struct drm_i915_private *dev_priv,
1940                                       u16 iir, u32 pipe_stats[I915_MAX_PIPES])
1941 {
1942         enum pipe pipe;
1943
1944         for_each_pipe(dev_priv, pipe) {
1945                 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
1946                         drm_handle_vblank(&dev_priv->drm, pipe);
1947
1948                 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1949                         i9xx_pipe_crc_irq_handler(dev_priv, pipe);
1950
1951                 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1952                         intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1953         }
1954 }
1955
1956 static void i915_pipestat_irq_handler(struct drm_i915_private *dev_priv,
1957                                       u32 iir, u32 pipe_stats[I915_MAX_PIPES])
1958 {
1959         bool blc_event = false;
1960         enum pipe pipe;
1961
1962         for_each_pipe(dev_priv, pipe) {
1963                 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
1964                         drm_handle_vblank(&dev_priv->drm, pipe);
1965
1966                 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
1967                         blc_event = true;
1968
1969                 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1970                         i9xx_pipe_crc_irq_handler(dev_priv, pipe);
1971
1972                 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1973                         intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1974         }
1975
1976         if (blc_event || (iir & I915_ASLE_INTERRUPT))
1977                 intel_opregion_asle_intr(dev_priv);
1978 }
1979
1980 static void i965_pipestat_irq_handler(struct drm_i915_private *dev_priv,
1981                                       u32 iir, u32 pipe_stats[I915_MAX_PIPES])
1982 {
1983         bool blc_event = false;
1984         enum pipe pipe;
1985
1986         for_each_pipe(dev_priv, pipe) {
1987                 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS)
1988                         drm_handle_vblank(&dev_priv->drm, pipe);
1989
1990                 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
1991                         blc_event = true;
1992
1993                 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1994                         i9xx_pipe_crc_irq_handler(dev_priv, pipe);
1995
1996                 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1997                         intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1998         }
1999
2000         if (blc_event || (iir & I915_ASLE_INTERRUPT))
2001                 intel_opregion_asle_intr(dev_priv);
2002
2003         if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
2004                 gmbus_irq_handler(dev_priv);
2005 }
2006
2007 static void valleyview_pipestat_irq_handler(struct drm_i915_private *dev_priv,
2008                                             u32 pipe_stats[I915_MAX_PIPES])
2009 {
2010         enum pipe pipe;
2011
2012         for_each_pipe(dev_priv, pipe) {
2013                 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS)
2014                         drm_handle_vblank(&dev_priv->drm, pipe);
2015
2016                 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
2017                         i9xx_pipe_crc_irq_handler(dev_priv, pipe);
2018
2019                 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2020                         intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2021         }
2022
2023         if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
2024                 gmbus_irq_handler(dev_priv);
2025 }
2026
2027 static u32 i9xx_hpd_irq_ack(struct drm_i915_private *dev_priv)
2028 {
2029         u32 hotplug_status = 0, hotplug_status_mask;
2030         int i;
2031
2032         if (IS_G4X(dev_priv) ||
2033             IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
2034                 hotplug_status_mask = HOTPLUG_INT_STATUS_G4X |
2035                         DP_AUX_CHANNEL_MASK_INT_STATUS_G4X;
2036         else
2037                 hotplug_status_mask = HOTPLUG_INT_STATUS_I915;
2038
2039         /*
2040          * We absolutely have to clear all the pending interrupt
2041          * bits in PORT_HOTPLUG_STAT. Otherwise the ISR port
2042          * interrupt bit won't have an edge, and the i965/g4x
2043          * edge triggered IIR will not notice that an interrupt
2044          * is still pending. We can't use PORT_HOTPLUG_EN to
2045          * guarantee the edge as the act of toggling the enable
2046          * bits can itself generate a new hotplug interrupt :(
2047          */
2048         for (i = 0; i < 10; i++) {
2049                 u32 tmp = I915_READ(PORT_HOTPLUG_STAT) & hotplug_status_mask;
2050
2051                 if (tmp == 0)
2052                         return hotplug_status;
2053
2054                 hotplug_status |= tmp;
2055                 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
2056         }
2057
2058         WARN_ONCE(1,
2059                   "PORT_HOTPLUG_STAT did not clear (0x%08x)\n",
2060                   I915_READ(PORT_HOTPLUG_STAT));
2061
2062         return hotplug_status;
2063 }
2064
2065 static void i9xx_hpd_irq_handler(struct drm_i915_private *dev_priv,
2066                                  u32 hotplug_status)
2067 {
2068         u32 pin_mask = 0, long_mask = 0;
2069
2070         if (IS_G4X(dev_priv) || IS_VALLEYVIEW(dev_priv) ||
2071             IS_CHERRYVIEW(dev_priv)) {
2072                 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_G4X;
2073
2074                 if (hotplug_trigger) {
2075                         intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
2076                                            hotplug_trigger, hotplug_trigger,
2077                                            hpd_status_g4x,
2078                                            i9xx_port_hotplug_long_detect);
2079
2080                         intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2081                 }
2082
2083                 if (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X)
2084                         dp_aux_irq_handler(dev_priv);
2085         } else {
2086                 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
2087
2088                 if (hotplug_trigger) {
2089                         intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
2090                                            hotplug_trigger, hotplug_trigger,
2091                                            hpd_status_i915,
2092                                            i9xx_port_hotplug_long_detect);
2093                         intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2094                 }
2095         }
2096 }
2097
2098 static irqreturn_t valleyview_irq_handler(int irq, void *arg)
2099 {
2100         struct drm_device *dev = arg;
2101         struct drm_i915_private *dev_priv = to_i915(dev);
2102         irqreturn_t ret = IRQ_NONE;
2103
2104         if (!intel_irqs_enabled(dev_priv))
2105                 return IRQ_NONE;
2106
2107         /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2108         disable_rpm_wakeref_asserts(dev_priv);
2109
2110         do {
2111                 u32 iir, gt_iir, pm_iir;
2112                 u32 pipe_stats[I915_MAX_PIPES] = {};
2113                 u32 hotplug_status = 0;
2114                 u32 ier = 0;
2115
2116                 gt_iir = I915_READ(GTIIR);
2117                 pm_iir = I915_READ(GEN6_PMIIR);
2118                 iir = I915_READ(VLV_IIR);
2119
2120                 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
2121                         break;
2122
2123                 ret = IRQ_HANDLED;
2124
2125                 /*
2126                  * Theory on interrupt generation, based on empirical evidence:
2127                  *
2128                  * x = ((VLV_IIR & VLV_IER) ||
2129                  *      (((GT_IIR & GT_IER) || (GEN6_PMIIR & GEN6_PMIER)) &&
2130                  *       (VLV_MASTER_IER & MASTER_INTERRUPT_ENABLE)));
2131                  *
2132                  * A CPU interrupt will only be raised when 'x' has a 0->1 edge.
2133                  * Hence we clear MASTER_INTERRUPT_ENABLE and VLV_IER to
2134                  * guarantee the CPU interrupt will be raised again even if we
2135                  * don't end up clearing all the VLV_IIR, GT_IIR, GEN6_PMIIR
2136                  * bits this time around.
2137                  */
2138                 I915_WRITE(VLV_MASTER_IER, 0);
2139                 ier = I915_READ(VLV_IER);
2140                 I915_WRITE(VLV_IER, 0);
2141
2142                 if (gt_iir)
2143                         I915_WRITE(GTIIR, gt_iir);
2144                 if (pm_iir)
2145                         I915_WRITE(GEN6_PMIIR, pm_iir);
2146
2147                 if (iir & I915_DISPLAY_PORT_INTERRUPT)
2148                         hotplug_status = i9xx_hpd_irq_ack(dev_priv);
2149
2150                 /* Call regardless, as some status bits might not be
2151                  * signalled in iir */
2152                 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
2153
2154                 if (iir & (I915_LPE_PIPE_A_INTERRUPT |
2155                            I915_LPE_PIPE_B_INTERRUPT))
2156                         intel_lpe_audio_irq_handler(dev_priv);
2157
2158                 /*
2159                  * VLV_IIR is single buffered, and reflects the level
2160                  * from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last.
2161                  */
2162                 if (iir)
2163                         I915_WRITE(VLV_IIR, iir);
2164
2165                 I915_WRITE(VLV_IER, ier);
2166                 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
2167
2168                 if (gt_iir)
2169                         snb_gt_irq_handler(dev_priv, gt_iir);
2170                 if (pm_iir)
2171                         gen6_rps_irq_handler(dev_priv, pm_iir);
2172
2173                 if (hotplug_status)
2174                         i9xx_hpd_irq_handler(dev_priv, hotplug_status);
2175
2176                 valleyview_pipestat_irq_handler(dev_priv, pipe_stats);
2177         } while (0);
2178
2179         enable_rpm_wakeref_asserts(dev_priv);
2180
2181         return ret;
2182 }
2183
2184 static irqreturn_t cherryview_irq_handler(int irq, void *arg)
2185 {
2186         struct drm_device *dev = arg;
2187         struct drm_i915_private *dev_priv = to_i915(dev);
2188         irqreturn_t ret = IRQ_NONE;
2189
2190         if (!intel_irqs_enabled(dev_priv))
2191                 return IRQ_NONE;
2192
2193         /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2194         disable_rpm_wakeref_asserts(dev_priv);
2195
2196         do {
2197                 u32 master_ctl, iir;
2198                 u32 pipe_stats[I915_MAX_PIPES] = {};
2199                 u32 hotplug_status = 0;
2200                 u32 gt_iir[4];
2201                 u32 ier = 0;
2202
2203                 master_ctl = I915_READ(GEN8_MASTER_IRQ) & ~GEN8_MASTER_IRQ_CONTROL;
2204                 iir = I915_READ(VLV_IIR);
2205
2206                 if (master_ctl == 0 && iir == 0)
2207                         break;
2208
2209                 ret = IRQ_HANDLED;
2210
2211                 /*
2212                  * Theory on interrupt generation, based on empirical evidence:
2213                  *
2214                  * x = ((VLV_IIR & VLV_IER) ||
2215                  *      ((GEN8_MASTER_IRQ & ~GEN8_MASTER_IRQ_CONTROL) &&
2216                  *       (GEN8_MASTER_IRQ & GEN8_MASTER_IRQ_CONTROL)));
2217                  *
2218                  * A CPU interrupt will only be raised when 'x' has a 0->1 edge.
2219                  * Hence we clear GEN8_MASTER_IRQ_CONTROL and VLV_IER to
2220                  * guarantee the CPU interrupt will be raised again even if we
2221                  * don't end up clearing all the VLV_IIR and GEN8_MASTER_IRQ_CONTROL
2222                  * bits this time around.
2223                  */
2224                 I915_WRITE(GEN8_MASTER_IRQ, 0);
2225                 ier = I915_READ(VLV_IER);
2226                 I915_WRITE(VLV_IER, 0);
2227
2228                 gen8_gt_irq_ack(dev_priv, master_ctl, gt_iir);
2229
2230                 if (iir & I915_DISPLAY_PORT_INTERRUPT)
2231                         hotplug_status = i9xx_hpd_irq_ack(dev_priv);
2232
2233                 /* Call regardless, as some status bits might not be
2234                  * signalled in iir */
2235                 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
2236
2237                 if (iir & (I915_LPE_PIPE_A_INTERRUPT |
2238                            I915_LPE_PIPE_B_INTERRUPT |
2239                            I915_LPE_PIPE_C_INTERRUPT))
2240                         intel_lpe_audio_irq_handler(dev_priv);
2241
2242                 /*
2243                  * VLV_IIR is single buffered, and reflects the level
2244                  * from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last.
2245                  */
2246                 if (iir)
2247                         I915_WRITE(VLV_IIR, iir);
2248
2249                 I915_WRITE(VLV_IER, ier);
2250                 I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
2251
2252                 gen8_gt_irq_handler(dev_priv, master_ctl, gt_iir);
2253
2254                 if (hotplug_status)
2255                         i9xx_hpd_irq_handler(dev_priv, hotplug_status);
2256
2257                 valleyview_pipestat_irq_handler(dev_priv, pipe_stats);
2258         } while (0);
2259
2260         enable_rpm_wakeref_asserts(dev_priv);
2261
2262         return ret;
2263 }
2264
2265 static void ibx_hpd_irq_handler(struct drm_i915_private *dev_priv,
2266                                 u32 hotplug_trigger,
2267                                 const u32 hpd[HPD_NUM_PINS])
2268 {
2269         u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
2270
2271         /*
2272          * Somehow the PCH doesn't seem to really ack the interrupt to the CPU
2273          * unless we touch the hotplug register, even if hotplug_trigger is
2274          * zero. Not acking leads to "The master control interrupt lied (SDE)!"
2275          * errors.
2276          */
2277         dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
2278         if (!hotplug_trigger) {
2279                 u32 mask = PORTA_HOTPLUG_STATUS_MASK |
2280                         PORTD_HOTPLUG_STATUS_MASK |
2281                         PORTC_HOTPLUG_STATUS_MASK |
2282                         PORTB_HOTPLUG_STATUS_MASK;
2283                 dig_hotplug_reg &= ~mask;
2284         }
2285
2286         I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
2287         if (!hotplug_trigger)
2288                 return;
2289
2290         intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, hotplug_trigger,
2291                            dig_hotplug_reg, hpd,
2292                            pch_port_hotplug_long_detect);
2293
2294         intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2295 }
2296
2297 static void ibx_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
2298 {
2299         int pipe;
2300         u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
2301
2302         ibx_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_ibx);
2303
2304         if (pch_iir & SDE_AUDIO_POWER_MASK) {
2305                 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
2306                                SDE_AUDIO_POWER_SHIFT);
2307                 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
2308                                  port_name(port));
2309         }
2310
2311         if (pch_iir & SDE_AUX_MASK)
2312                 dp_aux_irq_handler(dev_priv);
2313
2314         if (pch_iir & SDE_GMBUS)
2315                 gmbus_irq_handler(dev_priv);
2316
2317         if (pch_iir & SDE_AUDIO_HDCP_MASK)
2318                 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
2319
2320         if (pch_iir & SDE_AUDIO_TRANS_MASK)
2321                 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
2322
2323         if (pch_iir & SDE_POISON)
2324                 DRM_ERROR("PCH poison interrupt\n");
2325
2326         if (pch_iir & SDE_FDI_MASK)
2327                 for_each_pipe(dev_priv, pipe)
2328                         DRM_DEBUG_DRIVER("  pipe %c FDI IIR: 0x%08x\n",
2329                                          pipe_name(pipe),
2330                                          I915_READ(FDI_RX_IIR(pipe)));
2331
2332         if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
2333                 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
2334
2335         if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
2336                 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
2337
2338         if (pch_iir & SDE_TRANSA_FIFO_UNDER)
2339                 intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_A);
2340
2341         if (pch_iir & SDE_TRANSB_FIFO_UNDER)
2342                 intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_B);
2343 }
2344
2345 static void ivb_err_int_handler(struct drm_i915_private *dev_priv)
2346 {
2347         u32 err_int = I915_READ(GEN7_ERR_INT);
2348         enum pipe pipe;
2349
2350         if (err_int & ERR_INT_POISON)
2351                 DRM_ERROR("Poison interrupt\n");
2352
2353         for_each_pipe(dev_priv, pipe) {
2354                 if (err_int & ERR_INT_FIFO_UNDERRUN(pipe))
2355                         intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2356
2357                 if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) {
2358                         if (IS_IVYBRIDGE(dev_priv))
2359                                 ivb_pipe_crc_irq_handler(dev_priv, pipe);
2360                         else
2361                                 hsw_pipe_crc_irq_handler(dev_priv, pipe);
2362                 }
2363         }
2364
2365         I915_WRITE(GEN7_ERR_INT, err_int);
2366 }
2367
2368 static void cpt_serr_int_handler(struct drm_i915_private *dev_priv)
2369 {
2370         u32 serr_int = I915_READ(SERR_INT);
2371         enum pipe pipe;
2372
2373         if (serr_int & SERR_INT_POISON)
2374                 DRM_ERROR("PCH poison interrupt\n");
2375
2376         for_each_pipe(dev_priv, pipe)
2377                 if (serr_int & SERR_INT_TRANS_FIFO_UNDERRUN(pipe))
2378                         intel_pch_fifo_underrun_irq_handler(dev_priv, pipe);
2379
2380         I915_WRITE(SERR_INT, serr_int);
2381 }
2382
2383 static void cpt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
2384 {
2385         int pipe;
2386         u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
2387
2388         ibx_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_cpt);
2389
2390         if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
2391                 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
2392                                SDE_AUDIO_POWER_SHIFT_CPT);
2393                 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
2394                                  port_name(port));
2395         }
2396
2397         if (pch_iir & SDE_AUX_MASK_CPT)
2398                 dp_aux_irq_handler(dev_priv);
2399
2400         if (pch_iir & SDE_GMBUS_CPT)
2401                 gmbus_irq_handler(dev_priv);
2402
2403         if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
2404                 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
2405
2406         if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
2407                 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
2408
2409         if (pch_iir & SDE_FDI_MASK_CPT)
2410                 for_each_pipe(dev_priv, pipe)
2411                         DRM_DEBUG_DRIVER("  pipe %c FDI IIR: 0x%08x\n",
2412                                          pipe_name(pipe),
2413                                          I915_READ(FDI_RX_IIR(pipe)));
2414
2415         if (pch_iir & SDE_ERROR_CPT)
2416                 cpt_serr_int_handler(dev_priv);
2417 }
2418
2419 static void icp_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
2420 {
2421         u32 ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_ICP;
2422         u32 tc_hotplug_trigger = pch_iir & SDE_TC_MASK_ICP;
2423         u32 pin_mask = 0, long_mask = 0;
2424
2425         if (ddi_hotplug_trigger) {
2426                 u32 dig_hotplug_reg;
2427
2428                 dig_hotplug_reg = I915_READ(SHOTPLUG_CTL_DDI);
2429                 I915_WRITE(SHOTPLUG_CTL_DDI, dig_hotplug_reg);
2430
2431                 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
2432                                    ddi_hotplug_trigger,
2433                                    dig_hotplug_reg, hpd_icp,
2434                                    icp_ddi_port_hotplug_long_detect);
2435         }
2436
2437         if (tc_hotplug_trigger) {
2438                 u32 dig_hotplug_reg;
2439
2440                 dig_hotplug_reg = I915_READ(SHOTPLUG_CTL_TC);
2441                 I915_WRITE(SHOTPLUG_CTL_TC, dig_hotplug_reg);
2442
2443                 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
2444                                    tc_hotplug_trigger,
2445                                    dig_hotplug_reg, hpd_icp,
2446                                    icp_tc_port_hotplug_long_detect);
2447         }
2448
2449         if (pin_mask)
2450                 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2451
2452         if (pch_iir & SDE_GMBUS_ICP)
2453                 gmbus_irq_handler(dev_priv);
2454 }
2455
2456 static void spt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
2457 {
2458         u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_SPT &
2459                 ~SDE_PORTE_HOTPLUG_SPT;
2460         u32 hotplug2_trigger = pch_iir & SDE_PORTE_HOTPLUG_SPT;
2461         u32 pin_mask = 0, long_mask = 0;
2462
2463         if (hotplug_trigger) {
2464                 u32 dig_hotplug_reg;
2465
2466                 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
2467                 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
2468
2469                 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
2470                                    hotplug_trigger, dig_hotplug_reg, hpd_spt,
2471                                    spt_port_hotplug_long_detect);
2472         }
2473
2474         if (hotplug2_trigger) {
2475                 u32 dig_hotplug_reg;
2476
2477                 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG2);
2478                 I915_WRITE(PCH_PORT_HOTPLUG2, dig_hotplug_reg);
2479
2480                 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
2481                                    hotplug2_trigger, dig_hotplug_reg, hpd_spt,
2482                                    spt_port_hotplug2_long_detect);
2483         }
2484
2485         if (pin_mask)
2486                 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2487
2488         if (pch_iir & SDE_GMBUS_CPT)
2489                 gmbus_irq_handler(dev_priv);
2490 }
2491
2492 static void ilk_hpd_irq_handler(struct drm_i915_private *dev_priv,
2493                                 u32 hotplug_trigger,
2494                                 const u32 hpd[HPD_NUM_PINS])
2495 {
2496         u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
2497
2498         dig_hotplug_reg = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
2499         I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, dig_hotplug_reg);
2500
2501         intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, hotplug_trigger,
2502                            dig_hotplug_reg, hpd,
2503                            ilk_port_hotplug_long_detect);
2504
2505         intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2506 }
2507
2508 static void ilk_display_irq_handler(struct drm_i915_private *dev_priv,
2509                                     u32 de_iir)
2510 {
2511         enum pipe pipe;
2512         u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG;
2513
2514         if (hotplug_trigger)
2515                 ilk_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_ilk);
2516
2517         if (de_iir & DE_AUX_CHANNEL_A)
2518                 dp_aux_irq_handler(dev_priv);
2519
2520         if (de_iir & DE_GSE)
2521                 intel_opregion_asle_intr(dev_priv);
2522
2523         if (de_iir & DE_POISON)
2524                 DRM_ERROR("Poison interrupt\n");
2525
2526         for_each_pipe(dev_priv, pipe) {
2527                 if (de_iir & DE_PIPE_VBLANK(pipe))
2528                         drm_handle_vblank(&dev_priv->drm, pipe);
2529
2530                 if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe))
2531                         intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2532
2533                 if (de_iir & DE_PIPE_CRC_DONE(pipe))
2534                         i9xx_pipe_crc_irq_handler(dev_priv, pipe);
2535         }
2536
2537         /* check event from PCH */
2538         if (de_iir & DE_PCH_EVENT) {
2539                 u32 pch_iir = I915_READ(SDEIIR);
2540
2541                 if (HAS_PCH_CPT(dev_priv))
2542                         cpt_irq_handler(dev_priv, pch_iir);
2543                 else
2544                         ibx_irq_handler(dev_priv, pch_iir);
2545
2546                 /* should clear PCH hotplug event before clear CPU irq */
2547                 I915_WRITE(SDEIIR, pch_iir);
2548         }
2549
2550         if (IS_GEN5(dev_priv) && de_iir & DE_PCU_EVENT)
2551                 ironlake_rps_change_irq_handler(dev_priv);
2552 }
2553
2554 static void ivb_display_irq_handler(struct drm_i915_private *dev_priv,
2555                                     u32 de_iir)
2556 {
2557         enum pipe pipe;
2558         u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG_IVB;
2559
2560         if (hotplug_trigger)
2561                 ilk_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_ivb);
2562
2563         if (de_iir & DE_ERR_INT_IVB)
2564                 ivb_err_int_handler(dev_priv);
2565
2566         if (de_iir & DE_EDP_PSR_INT_HSW) {
2567                 u32 psr_iir = I915_READ(EDP_PSR_IIR);
2568
2569                 intel_psr_irq_handler(dev_priv, psr_iir);
2570                 I915_WRITE(EDP_PSR_IIR, psr_iir);
2571         }
2572
2573         if (de_iir & DE_AUX_CHANNEL_A_IVB)
2574                 dp_aux_irq_handler(dev_priv);
2575
2576         if (de_iir & DE_GSE_IVB)
2577                 intel_opregion_asle_intr(dev_priv);
2578
2579         for_each_pipe(dev_priv, pipe) {
2580                 if (de_iir & (DE_PIPE_VBLANK_IVB(pipe)))
2581                         drm_handle_vblank(&dev_priv->drm, pipe);
2582         }
2583
2584         /* check event from PCH */
2585         if (!HAS_PCH_NOP(dev_priv) && (de_iir & DE_PCH_EVENT_IVB)) {
2586                 u32 pch_iir = I915_READ(SDEIIR);
2587
2588                 cpt_irq_handler(dev_priv, pch_iir);
2589
2590                 /* clear PCH hotplug event before clear CPU irq */
2591                 I915_WRITE(SDEIIR, pch_iir);
2592         }
2593 }
2594
2595 /*
2596  * To handle irqs with the minimum potential races with fresh interrupts, we:
2597  * 1 - Disable Master Interrupt Control.
2598  * 2 - Find the source(s) of the interrupt.
2599  * 3 - Clear the Interrupt Identity bits (IIR).
2600  * 4 - Process the interrupt(s) that had bits set in the IIRs.
2601  * 5 - Re-enable Master Interrupt Control.
2602  */
2603 static irqreturn_t ironlake_irq_handler(int irq, void *arg)
2604 {
2605         struct drm_device *dev = arg;
2606         struct drm_i915_private *dev_priv = to_i915(dev);
2607         u32 de_iir, gt_iir, de_ier, sde_ier = 0;
2608         irqreturn_t ret = IRQ_NONE;
2609
2610         if (!intel_irqs_enabled(dev_priv))
2611                 return IRQ_NONE;
2612
2613         /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2614         disable_rpm_wakeref_asserts(dev_priv);
2615
2616         /* disable master interrupt before clearing iir  */
2617         de_ier = I915_READ(DEIER);
2618         I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
2619
2620         /* Disable south interrupts. We'll only write to SDEIIR once, so further
2621          * interrupts will will be stored on its back queue, and then we'll be
2622          * able to process them after we restore SDEIER (as soon as we restore
2623          * it, we'll get an interrupt if SDEIIR still has something to process
2624          * due to its back queue). */
2625         if (!HAS_PCH_NOP(dev_priv)) {
2626                 sde_ier = I915_READ(SDEIER);
2627                 I915_WRITE(SDEIER, 0);
2628         }
2629
2630         /* Find, clear, then process each source of interrupt */
2631
2632         gt_iir = I915_READ(GTIIR);
2633         if (gt_iir) {
2634                 I915_WRITE(GTIIR, gt_iir);
2635                 ret = IRQ_HANDLED;
2636                 if (INTEL_GEN(dev_priv) >= 6)
2637                         snb_gt_irq_handler(dev_priv, gt_iir);
2638                 else
2639                         ilk_gt_irq_handler(dev_priv, gt_iir);
2640         }
2641
2642         de_iir = I915_READ(DEIIR);
2643         if (de_iir) {
2644                 I915_WRITE(DEIIR, de_iir);
2645                 ret = IRQ_HANDLED;
2646                 if (INTEL_GEN(dev_priv) >= 7)
2647                         ivb_display_irq_handler(dev_priv, de_iir);
2648                 else
2649                         ilk_display_irq_handler(dev_priv, de_iir);
2650         }
2651
2652         if (INTEL_GEN(dev_priv) >= 6) {
2653                 u32 pm_iir = I915_READ(GEN6_PMIIR);
2654                 if (pm_iir) {
2655                         I915_WRITE(GEN6_PMIIR, pm_iir);
2656                         ret = IRQ_HANDLED;
2657                         gen6_rps_irq_handler(dev_priv, pm_iir);
2658                 }
2659         }
2660
2661         I915_WRITE(DEIER, de_ier);
2662         if (!HAS_PCH_NOP(dev_priv))
2663                 I915_WRITE(SDEIER, sde_ier);
2664
2665         /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2666         enable_rpm_wakeref_asserts(dev_priv);
2667
2668         return ret;
2669 }
2670
2671 static void bxt_hpd_irq_handler(struct drm_i915_private *dev_priv,
2672                                 u32 hotplug_trigger,
2673                                 const u32 hpd[HPD_NUM_PINS])
2674 {
2675         u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
2676
2677         dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
2678         I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
2679
2680         intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, hotplug_trigger,
2681                            dig_hotplug_reg, hpd,
2682                            bxt_port_hotplug_long_detect);
2683
2684         intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2685 }
2686
2687 static void gen11_hpd_irq_handler(struct drm_i915_private *dev_priv, u32 iir)
2688 {
2689         u32 pin_mask = 0, long_mask = 0;
2690         u32 trigger_tc = iir & GEN11_DE_TC_HOTPLUG_MASK;
2691         u32 trigger_tbt = iir & GEN11_DE_TBT_HOTPLUG_MASK;
2692
2693         if (trigger_tc) {
2694                 u32 dig_hotplug_reg;
2695
2696                 dig_hotplug_reg = I915_READ(GEN11_TC_HOTPLUG_CTL);
2697                 I915_WRITE(GEN11_TC_HOTPLUG_CTL, dig_hotplug_reg);
2698
2699                 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, trigger_tc,
2700                                    dig_hotplug_reg, hpd_gen11,
2701                                    gen11_port_hotplug_long_detect);
2702         }
2703
2704         if (trigger_tbt) {
2705                 u32 dig_hotplug_reg;
2706
2707                 dig_hotplug_reg = I915_READ(GEN11_TBT_HOTPLUG_CTL);
2708                 I915_WRITE(GEN11_TBT_HOTPLUG_CTL, dig_hotplug_reg);
2709
2710                 intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask, trigger_tbt,
2711                                    dig_hotplug_reg, hpd_gen11,
2712                                    gen11_port_hotplug_long_detect);
2713         }
2714
2715         if (pin_mask)
2716                 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2717         else
2718                 DRM_ERROR("Unexpected DE HPD interrupt 0x%08x\n", iir);
2719 }
2720
2721 static irqreturn_t
2722 gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
2723 {
2724         irqreturn_t ret = IRQ_NONE;
2725         u32 iir;
2726         enum pipe pipe;
2727
2728         if (master_ctl & GEN8_DE_MISC_IRQ) {
2729                 iir = I915_READ(GEN8_DE_MISC_IIR);
2730                 if (iir) {
2731                         bool found = false;
2732
2733                         I915_WRITE(GEN8_DE_MISC_IIR, iir);
2734                         ret = IRQ_HANDLED;
2735
2736                         if (iir & GEN8_DE_MISC_GSE) {
2737                                 intel_opregion_asle_intr(dev_priv);
2738                                 found = true;
2739                         }
2740
2741                         if (iir & GEN8_DE_EDP_PSR) {
2742                                 u32 psr_iir = I915_READ(EDP_PSR_IIR);
2743
2744                                 intel_psr_irq_handler(dev_priv, psr_iir);
2745                                 I915_WRITE(EDP_PSR_IIR, psr_iir);
2746                                 found = true;
2747                         }
2748
2749                         if (!found)
2750                                 DRM_ERROR("Unexpected DE Misc interrupt\n");
2751                 }
2752                 else
2753                         DRM_ERROR("The master control interrupt lied (DE MISC)!\n");
2754         }
2755
2756         if (INTEL_GEN(dev_priv) >= 11 && (master_ctl & GEN11_DE_HPD_IRQ)) {
2757                 iir = I915_READ(GEN11_DE_HPD_IIR);
2758                 if (iir) {
2759                         I915_WRITE(GEN11_DE_HPD_IIR, iir);
2760                         ret = IRQ_HANDLED;
2761                         gen11_hpd_irq_handler(dev_priv, iir);
2762                 } else {
2763                         DRM_ERROR("The master control interrupt lied, (DE HPD)!\n");
2764                 }
2765         }
2766
2767         if (master_ctl & GEN8_DE_PORT_IRQ) {
2768                 iir = I915_READ(GEN8_DE_PORT_IIR);
2769                 if (iir) {
2770                         u32 tmp_mask;
2771                         bool found = false;
2772
2773                         I915_WRITE(GEN8_DE_PORT_IIR, iir);
2774                         ret = IRQ_HANDLED;
2775
2776                         tmp_mask = GEN8_AUX_CHANNEL_A;
2777                         if (INTEL_GEN(dev_priv) >= 9)
2778                                 tmp_mask |= GEN9_AUX_CHANNEL_B |
2779                                             GEN9_AUX_CHANNEL_C |
2780                                             GEN9_AUX_CHANNEL_D;
2781
2782                         if (INTEL_GEN(dev_priv) >= 11)
2783                                 tmp_mask |= ICL_AUX_CHANNEL_E;
2784
2785                         if (IS_CNL_WITH_PORT_F(dev_priv) ||
2786                             INTEL_GEN(dev_priv) >= 11)
2787                                 tmp_mask |= CNL_AUX_CHANNEL_F;
2788
2789                         if (iir & tmp_mask) {
2790                                 dp_aux_irq_handler(dev_priv);
2791                                 found = true;
2792                         }
2793
2794                         if (IS_GEN9_LP(dev_priv)) {
2795                                 tmp_mask = iir & BXT_DE_PORT_HOTPLUG_MASK;
2796                                 if (tmp_mask) {
2797                                         bxt_hpd_irq_handler(dev_priv, tmp_mask,
2798                                                             hpd_bxt);
2799                                         found = true;
2800                                 }
2801                         } else if (IS_BROADWELL(dev_priv)) {
2802                                 tmp_mask = iir & GEN8_PORT_DP_A_HOTPLUG;
2803                                 if (tmp_mask) {
2804                                         ilk_hpd_irq_handler(dev_priv,
2805                                                             tmp_mask, hpd_bdw);
2806                                         found = true;
2807                                 }
2808                         }
2809
2810                         if (IS_GEN9_LP(dev_priv) && (iir & BXT_DE_PORT_GMBUS)) {
2811                                 gmbus_irq_handler(dev_priv);
2812                                 found = true;
2813                         }
2814
2815                         if (!found)
2816                                 DRM_ERROR("Unexpected DE Port interrupt\n");
2817                 }
2818                 else
2819                         DRM_ERROR("The master control interrupt lied (DE PORT)!\n");
2820         }
2821
2822         for_each_pipe(dev_priv, pipe) {
2823                 u32 fault_errors;
2824
2825                 if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe)))
2826                         continue;
2827
2828                 iir = I915_READ(GEN8_DE_PIPE_IIR(pipe));
2829                 if (!iir) {
2830                         DRM_ERROR("The master control interrupt lied (DE PIPE)!\n");
2831                         continue;
2832                 }
2833
2834                 ret = IRQ_HANDLED;
2835                 I915_WRITE(GEN8_DE_PIPE_IIR(pipe), iir);
2836
2837                 if (iir & GEN8_PIPE_VBLANK)
2838                         drm_handle_vblank(&dev_priv->drm, pipe);
2839
2840                 if (iir & GEN8_PIPE_CDCLK_CRC_DONE)
2841                         hsw_pipe_crc_irq_handler(dev_priv, pipe);
2842
2843                 if (iir & GEN8_PIPE_FIFO_UNDERRUN)
2844                         intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2845
2846                 fault_errors = iir;
2847                 if (INTEL_GEN(dev_priv) >= 9)
2848                         fault_errors &= GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
2849                 else
2850                         fault_errors &= GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
2851
2852                 if (fault_errors)
2853                         DRM_ERROR("Fault errors on pipe %c: 0x%08x\n",
2854                                   pipe_name(pipe),
2855                                   fault_errors);
2856         }
2857
2858         if (HAS_PCH_SPLIT(dev_priv) && !HAS_PCH_NOP(dev_priv) &&
2859             master_ctl & GEN8_DE_PCH_IRQ) {
2860                 /*
2861                  * FIXME(BDW): Assume for now that the new interrupt handling
2862                  * scheme also closed the SDE interrupt handling race we've seen
2863                  * on older pch-split platforms. But this needs testing.
2864                  */
2865                 iir = I915_READ(SDEIIR);
2866                 if (iir) {
2867                         I915_WRITE(SDEIIR, iir);
2868                         ret = IRQ_HANDLED;
2869
2870                         if (HAS_PCH_ICP(dev_priv))
2871                                 icp_irq_handler(dev_priv, iir);
2872                         else if (HAS_PCH_SPT(dev_priv) ||
2873                                  HAS_PCH_KBP(dev_priv) ||
2874                                  HAS_PCH_CNP(dev_priv))
2875                                 spt_irq_handler(dev_priv, iir);
2876                         else
2877                                 cpt_irq_handler(dev_priv, iir);
2878                 } else {
2879                         /*
2880                          * Like on previous PCH there seems to be something
2881                          * fishy going on with forwarding PCH interrupts.
2882                          */
2883                         DRM_DEBUG_DRIVER("The master control interrupt lied (SDE)!\n");
2884                 }
2885         }
2886
2887         return ret;
2888 }
2889
2890 static irqreturn_t gen8_irq_handler(int irq, void *arg)
2891 {
2892         struct drm_i915_private *dev_priv = to_i915(arg);
2893         u32 master_ctl;
2894         u32 gt_iir[4];
2895
2896         if (!intel_irqs_enabled(dev_priv))
2897                 return IRQ_NONE;
2898
2899         master_ctl = I915_READ_FW(GEN8_MASTER_IRQ);
2900         master_ctl &= ~GEN8_MASTER_IRQ_CONTROL;
2901         if (!master_ctl)
2902                 return IRQ_NONE;
2903
2904         I915_WRITE_FW(GEN8_MASTER_IRQ, 0);
2905
2906         /* Find, clear, then process each source of interrupt */
2907         gen8_gt_irq_ack(dev_priv, master_ctl, gt_iir);
2908
2909         /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2910         if (master_ctl & ~GEN8_GT_IRQS) {
2911                 disable_rpm_wakeref_asserts(dev_priv);
2912                 gen8_de_irq_handler(dev_priv, master_ctl);
2913                 enable_rpm_wakeref_asserts(dev_priv);
2914         }
2915
2916         I915_WRITE_FW(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
2917
2918         gen8_gt_irq_handler(dev_priv, master_ctl, gt_iir);
2919
2920         return IRQ_HANDLED;
2921 }
2922
2923 struct wedge_me {
2924         struct delayed_work work;
2925         struct drm_i915_private *i915;
2926         const char *name;
2927 };
2928
2929 static void wedge_me(struct work_struct *work)
2930 {
2931         struct wedge_me *w = container_of(work, typeof(*w), work.work);
2932
2933         dev_err(w->i915->drm.dev,
2934                 "%s timed out, cancelling all in-flight rendering.\n",
2935                 w->name);
2936         i915_gem_set_wedged(w->i915);
2937 }
2938
2939 static void __init_wedge(struct wedge_me *w,
2940                          struct drm_i915_private *i915,
2941                          long timeout,
2942                          const char *name)
2943 {
2944         w->i915 = i915;
2945         w->name = name;
2946
2947         INIT_DELAYED_WORK_ONSTACK(&w->work, wedge_me);
2948         schedule_delayed_work(&w->work, timeout);
2949 }
2950
2951 static void __fini_wedge(struct wedge_me *w)
2952 {
2953         cancel_delayed_work_sync(&w->work);
2954         destroy_delayed_work_on_stack(&w->work);
2955         w->i915 = NULL;
2956 }
2957
2958 #define i915_wedge_on_timeout(W, DEV, TIMEOUT)                          \
2959         for (__init_wedge((W), (DEV), (TIMEOUT), __func__);             \
2960              (W)->i915;                                                 \
2961              __fini_wedge((W)))
2962
2963 static u32
2964 gen11_gt_engine_identity(struct drm_i915_private * const i915,
2965                          const unsigned int bank, const unsigned int bit)
2966 {
2967         void __iomem * const regs = i915->regs;
2968         u32 timeout_ts;
2969         u32 ident;
2970
2971         lockdep_assert_held(&i915->irq_lock);
2972
2973         raw_reg_write(regs, GEN11_IIR_REG_SELECTOR(bank), BIT(bit));
2974
2975         /*
2976          * NB: Specs do not specify how long to spin wait,
2977          * so we do ~100us as an educated guess.
2978          */
2979         timeout_ts = (local_clock() >> 10) + 100;
2980         do {
2981                 ident = raw_reg_read(regs, GEN11_INTR_IDENTITY_REG(bank));
2982         } while (!(ident & GEN11_INTR_DATA_VALID) &&
2983                  !time_after32(local_clock() >> 10, timeout_ts));
2984
2985         if (unlikely(!(ident & GEN11_INTR_DATA_VALID))) {
2986                 DRM_ERROR("INTR_IDENTITY_REG%u:%u 0x%08x not valid!\n",
2987                           bank, bit, ident);
2988                 return 0;
2989         }
2990
2991         raw_reg_write(regs, GEN11_INTR_IDENTITY_REG(bank),
2992                       GEN11_INTR_DATA_VALID);
2993
2994         return ident;
2995 }
2996
2997 static void
2998 gen11_other_irq_handler(struct drm_i915_private * const i915,
2999                         const u8 instance, const u16 iir)
3000 {
3001         if (instance == OTHER_GTPM_INSTANCE)
3002                 return gen6_rps_irq_handler(i915, iir);
3003
3004         WARN_ONCE(1, "unhandled other interrupt instance=0x%x, iir=0x%x\n",
3005                   instance, iir);
3006 }
3007
3008 static void
3009 gen11_engine_irq_handler(struct drm_i915_private * const i915,
3010                          const u8 class, const u8 instance, const u16 iir)
3011 {
3012         struct intel_engine_cs *engine;
3013
3014         if (instance <= MAX_ENGINE_INSTANCE)
3015                 engine = i915->engine_class[class][instance];
3016         else
3017                 engine = NULL;
3018
3019         if (likely(engine))
3020                 return gen8_cs_irq_handler(engine, iir);
3021
3022         WARN_ONCE(1, "unhandled engine interrupt class=0x%x, instance=0x%x\n",
3023                   class, instance);
3024 }
3025
3026 static void
3027 gen11_gt_identity_handler(struct drm_i915_private * const i915,
3028                           const u32 identity)
3029 {
3030         const u8 class = GEN11_INTR_ENGINE_CLASS(identity);
3031         const u8 instance = GEN11_INTR_ENGINE_INSTANCE(identity);
3032         const u16 intr = GEN11_INTR_ENGINE_INTR(identity);
3033
3034         if (unlikely(!intr))
3035                 return;
3036
3037         if (class <= COPY_ENGINE_CLASS)
3038                 return gen11_engine_irq_handler(i915, class, instance, intr);
3039
3040         if (class == OTHER_CLASS)
3041                 return gen11_other_irq_handler(i915, instance, intr);
3042
3043         WARN_ONCE(1, "unknown interrupt class=0x%x, instance=0x%x, intr=0x%x\n",
3044                   class, instance, intr);
3045 }
3046
3047 static void
3048 gen11_gt_bank_handler(struct drm_i915_private * const i915,
3049                       const unsigned int bank)
3050 {
3051         void __iomem * const regs = i915->regs;
3052         unsigned long intr_dw;
3053         unsigned int bit;
3054
3055         lockdep_assert_held(&i915->irq_lock);
3056
3057         intr_dw = raw_reg_read(regs, GEN11_GT_INTR_DW(bank));
3058
3059         if (unlikely(!intr_dw)) {
3060                 DRM_ERROR("GT_INTR_DW%u blank!\n", bank);
3061                 return;
3062         }
3063
3064         for_each_set_bit(bit, &intr_dw, 32) {
3065                 const u32 ident = gen11_gt_engine_identity(i915,
3066                                                            bank, bit);
3067
3068                 gen11_gt_identity_handler(i915, ident);
3069         }
3070
3071         /* Clear must be after shared has been served for engine */
3072         raw_reg_write(regs, GEN11_GT_INTR_DW(bank), intr_dw);
3073 }
3074
3075 static void
3076 gen11_gt_irq_handler(struct drm_i915_private * const i915,
3077                      const u32 master_ctl)
3078 {
3079         unsigned int bank;
3080
3081         spin_lock(&i915->irq_lock);
3082
3083         for (bank = 0; bank < 2; bank++) {
3084                 if (master_ctl & GEN11_GT_DW_IRQ(bank))
3085                         gen11_gt_bank_handler(i915, bank);
3086         }
3087
3088         spin_unlock(&i915->irq_lock);
3089 }
3090
3091 static void
3092 gen11_gu_misc_irq_ack(struct drm_i915_private *dev_priv, const u32 master_ctl,
3093                       u32 *iir)
3094 {
3095         void __iomem * const regs = dev_priv->regs;
3096
3097         if (!(master_ctl & GEN11_GU_MISC_IRQ))
3098                 return;
3099
3100         *iir = raw_reg_read(regs, GEN11_GU_MISC_IIR);
3101         if (likely(*iir))
3102                 raw_reg_write(regs, GEN11_GU_MISC_IIR, *iir);
3103 }
3104
3105 static void
3106 gen11_gu_misc_irq_handler(struct drm_i915_private *dev_priv,
3107                           const u32 master_ctl, const u32 iir)
3108 {
3109         if (!(master_ctl & GEN11_GU_MISC_IRQ))
3110                 return;
3111
3112         if (unlikely(!iir)) {
3113                 DRM_ERROR("GU_MISC iir blank!\n");
3114                 return;
3115         }
3116
3117         if (iir & GEN11_GU_MISC_GSE)
3118                 intel_opregion_asle_intr(dev_priv);
3119         else
3120                 DRM_ERROR("Unexpected GU_MISC interrupt 0x%x\n", iir);
3121 }
3122
3123 static irqreturn_t gen11_irq_handler(int irq, void *arg)
3124 {
3125         struct drm_i915_private * const i915 = to_i915(arg);
3126         void __iomem * const regs = i915->regs;
3127         u32 master_ctl;
3128         u32 gu_misc_iir;
3129
3130         if (!intel_irqs_enabled(i915))
3131                 return IRQ_NONE;
3132
3133         master_ctl = raw_reg_read(regs, GEN11_GFX_MSTR_IRQ);
3134         master_ctl &= ~GEN11_MASTER_IRQ;
3135         if (!master_ctl)
3136                 return IRQ_NONE;
3137
3138         /* Disable interrupts. */
3139         raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, 0);
3140
3141         /* Find, clear, then process each source of interrupt. */
3142         gen11_gt_irq_handler(i915, master_ctl);
3143
3144         /* IRQs are synced during runtime_suspend, we don't require a wakeref */
3145         if (master_ctl & GEN11_DISPLAY_IRQ) {
3146                 const u32 disp_ctl = raw_reg_read(regs, GEN11_DISPLAY_INT_CTL);
3147
3148                 disable_rpm_wakeref_asserts(i915);
3149                 /*
3150                  * GEN11_DISPLAY_INT_CTL has same format as GEN8_MASTER_IRQ
3151                  * for the display related bits.
3152                  */
3153                 gen8_de_irq_handler(i915, disp_ctl);
3154                 enable_rpm_wakeref_asserts(i915);
3155         }
3156
3157         gen11_gu_misc_irq_ack(i915, master_ctl, &gu_misc_iir);
3158
3159         /* Acknowledge and enable interrupts. */
3160         raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, GEN11_MASTER_IRQ | master_ctl);
3161
3162         gen11_gu_misc_irq_handler(i915, master_ctl, gu_misc_iir);
3163
3164         return IRQ_HANDLED;
3165 }
3166
3167 static void i915_reset_device(struct drm_i915_private *dev_priv,
3168                               u32 engine_mask,
3169                               const char *reason)
3170 {
3171         struct i915_gpu_error *error = &dev_priv->gpu_error;
3172         struct kobject *kobj = &dev_priv->drm.primary->kdev->kobj;
3173         char *error_event[] = { I915_ERROR_UEVENT "=1", NULL };
3174         char *reset_event[] = { I915_RESET_UEVENT "=1", NULL };
3175         char *reset_done_event[] = { I915_ERROR_UEVENT "=0", NULL };
3176         struct wedge_me w;
3177
3178         kobject_uevent_env(kobj, KOBJ_CHANGE, error_event);
3179
3180         DRM_DEBUG_DRIVER("resetting chip\n");
3181         kobject_uevent_env(kobj, KOBJ_CHANGE, reset_event);
3182
3183         /* Use a watchdog to ensure that our reset completes */
3184         i915_wedge_on_timeout(&w, dev_priv, 5*HZ) {
3185                 intel_prepare_reset(dev_priv);
3186
3187                 error->reason = reason;
3188                 error->stalled_mask = engine_mask;
3189
3190                 /* Signal that locked waiters should reset the GPU */
3191                 smp_mb__before_atomic();
3192                 set_bit(I915_RESET_HANDOFF, &error->flags);
3193                 wake_up_all(&error->wait_queue);
3194
3195                 /* Wait for anyone holding the lock to wakeup, without
3196                  * blocking indefinitely on struct_mutex.
3197                  */
3198                 do {
3199                         if (mutex_trylock(&dev_priv->drm.struct_mutex)) {
3200                                 i915_reset(dev_priv, engine_mask, reason);
3201                                 mutex_unlock(&dev_priv->drm.struct_mutex);
3202                         }
3203                 } while (wait_on_bit_timeout(&error->flags,
3204                                              I915_RESET_HANDOFF,
3205                                              TASK_UNINTERRUPTIBLE,
3206                                              1));
3207
3208                 error->stalled_mask = 0;
3209                 error->reason = NULL;
3210
3211                 intel_finish_reset(dev_priv);
3212         }
3213
3214         if (!test_bit(I915_WEDGED, &error->flags))
3215                 kobject_uevent_env(kobj, KOBJ_CHANGE, reset_done_event);
3216 }
3217
3218 void i915_clear_error_registers(struct drm_i915_private *dev_priv)
3219 {
3220         u32 eir;
3221
3222         if (!IS_GEN2(dev_priv))
3223                 I915_WRITE(PGTBL_ER, I915_READ(PGTBL_ER));
3224
3225         if (INTEL_GEN(dev_priv) < 4)
3226                 I915_WRITE(IPEIR, I915_READ(IPEIR));
3227         else
3228                 I915_WRITE(IPEIR_I965, I915_READ(IPEIR_I965));
3229
3230         I915_WRITE(EIR, I915_READ(EIR));
3231         eir = I915_READ(EIR);
3232         if (eir) {
3233                 /*
3234                  * some errors might have become stuck,
3235                  * mask them.
3236                  */
3237                 DRM_DEBUG_DRIVER("EIR stuck: 0x%08x, masking\n", eir);
3238                 I915_WRITE(EMR, I915_READ(EMR) | eir);
3239                 I915_WRITE(IIR, I915_MASTER_ERROR_INTERRUPT);
3240         }
3241
3242         if (INTEL_GEN(dev_priv) >= 8) {
3243                 I915_WRITE(GEN8_RING_FAULT_REG,
3244                            I915_READ(GEN8_RING_FAULT_REG) & ~RING_FAULT_VALID);
3245                 POSTING_READ(GEN8_RING_FAULT_REG);
3246         } else if (INTEL_GEN(dev_priv) >= 6) {
3247                 struct intel_engine_cs *engine;
3248                 enum intel_engine_id id;
3249
3250                 for_each_engine(engine, dev_priv, id) {
3251                         I915_WRITE(RING_FAULT_REG(engine),
3252                                    I915_READ(RING_FAULT_REG(engine)) &
3253                                    ~RING_FAULT_VALID);
3254                 }
3255                 POSTING_READ(RING_FAULT_REG(dev_priv->engine[RCS]));
3256         }
3257 }
3258
3259 /**
3260  * i915_handle_error - handle a gpu error
3261  * @dev_priv: i915 device private
3262  * @engine_mask: mask representing engines that are hung
3263  * @flags: control flags
3264  * @fmt: Error message format string
3265  *
3266  * Do some basic checking of register state at error time and
3267  * dump it to the syslog.  Also call i915_capture_error_state() to make
3268  * sure we get a record and make it available in debugfs.  Fire a uevent
3269  * so userspace knows something bad happened (should trigger collection
3270  * of a ring dump etc.).
3271  */
3272 void i915_handle_error(struct drm_i915_private *dev_priv,
3273                        u32 engine_mask,
3274                        unsigned long flags,
3275                        const char *fmt, ...)
3276 {
3277         struct intel_engine_cs *engine;
3278         unsigned int tmp;
3279         char error_msg[80];
3280         char *msg = NULL;
3281
3282         if (fmt) {
3283                 va_list args;
3284
3285                 va_start(args, fmt);
3286                 vscnprintf(error_msg, sizeof(error_msg), fmt, args);
3287                 va_end(args);
3288
3289                 msg = error_msg;
3290         }
3291
3292         /*
3293          * In most cases it's guaranteed that we get here with an RPM
3294          * reference held, for example because there is a pending GPU
3295          * request that won't finish until the reset is done. This
3296          * isn't the case at least when we get here by doing a
3297          * simulated reset via debugfs, so get an RPM reference.
3298          */
3299         intel_runtime_pm_get(dev_priv);
3300
3301         engine_mask &= INTEL_INFO(dev_priv)->ring_mask;
3302
3303         if (flags & I915_ERROR_CAPTURE) {
3304                 i915_capture_error_state(dev_priv, engine_mask, msg);
3305                 i915_clear_error_registers(dev_priv);
3306         }
3307
3308         /*
3309          * Try engine reset when available. We fall back to full reset if
3310          * single reset fails.
3311          */
3312         if (intel_has_reset_engine(dev_priv) &&
3313             !i915_terminally_wedged(&dev_priv->gpu_error)) {
3314                 for_each_engine_masked(engine, dev_priv, engine_mask, tmp) {
3315                         BUILD_BUG_ON(I915_RESET_MODESET >= I915_RESET_ENGINE);
3316                         if (test_and_set_bit(I915_RESET_ENGINE + engine->id,
3317                                              &dev_priv->gpu_error.flags))
3318                                 continue;
3319
3320                         if (i915_reset_engine(engine, msg) == 0)
3321                                 engine_mask &= ~intel_engine_flag(engine);
3322
3323                         clear_bit(I915_RESET_ENGINE + engine->id,
3324                                   &dev_priv->gpu_error.flags);
3325                         wake_up_bit(&dev_priv->gpu_error.flags,
3326                                     I915_RESET_ENGINE + engine->id);
3327                 }
3328         }
3329
3330         if (!engine_mask)
3331                 goto out;
3332
3333         /* Full reset needs the mutex, stop any other user trying to do so. */
3334         if (test_and_set_bit(I915_RESET_BACKOFF, &dev_priv->gpu_error.flags)) {
3335                 wait_event(dev_priv->gpu_error.reset_queue,
3336                            !test_bit(I915_RESET_BACKOFF,
3337                                      &dev_priv->gpu_error.flags));
3338                 goto out;
3339         }
3340
3341         /* Prevent any other reset-engine attempt. */
3342         for_each_engine(engine, dev_priv, tmp) {
3343                 while (test_and_set_bit(I915_RESET_ENGINE + engine->id,
3344                                         &dev_priv->gpu_error.flags))
3345                         wait_on_bit(&dev_priv->gpu_error.flags,
3346                                     I915_RESET_ENGINE + engine->id,
3347                                     TASK_UNINTERRUPTIBLE);
3348         }
3349
3350         i915_reset_device(dev_priv, engine_mask, msg);
3351
3352         for_each_engine(engine, dev_priv, tmp) {
3353                 clear_bit(I915_RESET_ENGINE + engine->id,
3354                           &dev_priv->gpu_error.flags);
3355         }
3356
3357         clear_bit(I915_RESET_BACKOFF, &dev_priv->gpu_error.flags);
3358         wake_up_all(&dev_priv->gpu_error.reset_queue);
3359
3360 out:
3361         intel_runtime_pm_put(dev_priv);
3362 }
3363
3364 /* Called from drm generic code, passed 'crtc' which
3365  * we use as a pipe index
3366  */
3367 static int i8xx_enable_vblank(struct drm_device *dev, unsigned int pipe)
3368 {
3369         struct drm_i915_private *dev_priv = to_i915(dev);
3370         unsigned long irqflags;
3371
3372         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3373         i915_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS);
3374         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3375
3376         return 0;
3377 }
3378
3379 static int i965_enable_vblank(struct drm_device *dev, unsigned int pipe)
3380 {
3381         struct drm_i915_private *dev_priv = to_i915(dev);
3382         unsigned long irqflags;
3383
3384         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3385         i915_enable_pipestat(dev_priv, pipe,
3386                              PIPE_START_VBLANK_INTERRUPT_STATUS);
3387         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3388
3389         return 0;
3390 }
3391
3392 static int ironlake_enable_vblank(struct drm_device *dev, unsigned int pipe)
3393 {
3394         struct drm_i915_private *dev_priv = to_i915(dev);
3395         unsigned long irqflags;
3396         uint32_t bit = INTEL_GEN(dev_priv) >= 7 ?
3397                 DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe);
3398
3399         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3400         ilk_enable_display_irq(dev_priv, bit);
3401         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3402
3403         /* Even though there is no DMC, frame counter can get stuck when
3404          * PSR is active as no frames are generated.
3405          */
3406         if (HAS_PSR(dev_priv))
3407                 drm_vblank_restore(dev, pipe);
3408
3409         return 0;
3410 }
3411
3412 static int gen8_enable_vblank(struct drm_device *dev, unsigned int pipe)
3413 {
3414         struct drm_i915_private *dev_priv = to_i915(dev);
3415         unsigned long irqflags;
3416
3417         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3418         bdw_enable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
3419         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3420
3421         /* Even if there is no DMC, frame counter can get stuck when
3422          * PSR is active as no frames are generated, so check only for PSR.
3423          */
3424         if (HAS_PSR(dev_priv))
3425                 drm_vblank_restore(dev, pipe);
3426
3427         return 0;
3428 }
3429
3430 /* Called from drm generic code, passed 'crtc' which
3431  * we use as a pipe index
3432  */
3433 static void i8xx_disable_vblank(struct drm_device *dev, unsigned int pipe)
3434 {
3435         struct drm_i915_private *dev_priv = to_i915(dev);
3436         unsigned long irqflags;
3437
3438         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3439         i915_disable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS);
3440         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3441 }
3442
3443 static void i965_disable_vblank(struct drm_device *dev, unsigned int pipe)
3444 {
3445         struct drm_i915_private *dev_priv = to_i915(dev);
3446         unsigned long irqflags;
3447
3448         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3449         i915_disable_pipestat(dev_priv, pipe,
3450                               PIPE_START_VBLANK_INTERRUPT_STATUS);
3451         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3452 }
3453
3454 static void ironlake_disable_vblank(struct drm_device *dev, unsigned int pipe)
3455 {
3456         struct drm_i915_private *dev_priv = to_i915(dev);
3457         unsigned long irqflags;
3458         uint32_t bit = INTEL_GEN(dev_priv) >= 7 ?
3459                 DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe);
3460
3461         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3462         ilk_disable_display_irq(dev_priv, bit);
3463         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3464 }
3465
3466 static void gen8_disable_vblank(struct drm_device *dev, unsigned int pipe)
3467 {
3468         struct drm_i915_private *dev_priv = to_i915(dev);
3469         unsigned long irqflags;
3470
3471         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3472         bdw_disable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
3473         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3474 }
3475
3476 static void ibx_irq_reset(struct drm_i915_private *dev_priv)
3477 {
3478         if (HAS_PCH_NOP(dev_priv))
3479                 return;
3480
3481         GEN3_IRQ_RESET(SDE);
3482
3483         if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv))
3484                 I915_WRITE(SERR_INT, 0xffffffff);
3485 }
3486
3487 /*
3488  * SDEIER is also touched by the interrupt handler to work around missed PCH
3489  * interrupts. Hence we can't update it after the interrupt handler is enabled -
3490  * instead we unconditionally enable all PCH interrupt sources here, but then
3491  * only unmask them as needed with SDEIMR.
3492  *
3493  * This function needs to be called before interrupts are enabled.
3494  */
3495 static void ibx_irq_pre_postinstall(struct drm_device *dev)
3496 {
3497         struct drm_i915_private *dev_priv = to_i915(dev);
3498
3499         if (HAS_PCH_NOP(dev_priv))
3500                 return;
3501
3502         WARN_ON(I915_READ(SDEIER) != 0);
3503         I915_WRITE(SDEIER, 0xffffffff);
3504         POSTING_READ(SDEIER);
3505 }
3506
3507 static void gen5_gt_irq_reset(struct drm_i915_private *dev_priv)
3508 {
3509         GEN3_IRQ_RESET(GT);
3510         if (INTEL_GEN(dev_priv) >= 6)
3511                 GEN3_IRQ_RESET(GEN6_PM);
3512 }
3513
3514 static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
3515 {
3516         if (IS_CHERRYVIEW(dev_priv))
3517                 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
3518         else
3519                 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
3520
3521         i915_hotplug_interrupt_update_locked(dev_priv, 0xffffffff, 0);
3522         I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3523
3524         i9xx_pipestat_irq_reset(dev_priv);
3525
3526         GEN3_IRQ_RESET(VLV_);
3527         dev_priv->irq_mask = ~0u;
3528 }
3529
3530 static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
3531 {
3532         u32 pipestat_mask;
3533         u32 enable_mask;
3534         enum pipe pipe;
3535
3536         pipestat_mask = PIPE_CRC_DONE_INTERRUPT_STATUS;
3537
3538         i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
3539         for_each_pipe(dev_priv, pipe)
3540                 i915_enable_pipestat(dev_priv, pipe, pipestat_mask);
3541
3542         enable_mask = I915_DISPLAY_PORT_INTERRUPT |
3543                 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3544                 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3545                 I915_LPE_PIPE_A_INTERRUPT |
3546                 I915_LPE_PIPE_B_INTERRUPT;
3547
3548         if (IS_CHERRYVIEW(dev_priv))
3549                 enable_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT |
3550                         I915_LPE_PIPE_C_INTERRUPT;
3551
3552         WARN_ON(dev_priv->irq_mask != ~0u);
3553
3554         dev_priv->irq_mask = ~enable_mask;
3555
3556         GEN3_IRQ_INIT(VLV_, dev_priv->irq_mask, enable_mask);
3557 }
3558
3559 /* drm_dma.h hooks
3560 */
3561 static void ironlake_irq_reset(struct drm_device *dev)
3562 {
3563         struct drm_i915_private *dev_priv = to_i915(dev);
3564
3565         if (IS_GEN5(dev_priv))
3566                 I915_WRITE(HWSTAM, 0xffffffff);
3567
3568         GEN3_IRQ_RESET(DE);
3569         if (IS_GEN7(dev_priv))
3570                 I915_WRITE(GEN7_ERR_INT, 0xffffffff);
3571
3572         if (IS_HASWELL(dev_priv)) {
3573                 I915_WRITE(EDP_PSR_IMR, 0xffffffff);
3574                 I915_WRITE(EDP_PSR_IIR, 0xffffffff);
3575         }
3576
3577         gen5_gt_irq_reset(dev_priv);
3578
3579         ibx_irq_reset(dev_priv);
3580 }
3581
3582 static void valleyview_irq_reset(struct drm_device *dev)
3583 {
3584         struct drm_i915_private *dev_priv = to_i915(dev);
3585
3586         I915_WRITE(VLV_MASTER_IER, 0);
3587         POSTING_READ(VLV_MASTER_IER);
3588
3589         gen5_gt_irq_reset(dev_priv);
3590
3591         spin_lock_irq(&dev_priv->irq_lock);
3592         if (dev_priv->display_irqs_enabled)
3593                 vlv_display_irq_reset(dev_priv);
3594         spin_unlock_irq(&dev_priv->irq_lock);
3595 }
3596
3597 static void gen8_gt_irq_reset(struct drm_i915_private *dev_priv)
3598 {
3599         GEN8_IRQ_RESET_NDX(GT, 0);
3600         GEN8_IRQ_RESET_NDX(GT, 1);
3601         GEN8_IRQ_RESET_NDX(GT, 2);
3602         GEN8_IRQ_RESET_NDX(GT, 3);
3603 }
3604
3605 static void gen8_irq_reset(struct drm_device *dev)
3606 {
3607         struct drm_i915_private *dev_priv = to_i915(dev);
3608         int pipe;
3609
3610         I915_WRITE(GEN8_MASTER_IRQ, 0);
3611         POSTING_READ(GEN8_MASTER_IRQ);
3612
3613         gen8_gt_irq_reset(dev_priv);
3614
3615         I915_WRITE(EDP_PSR_IMR, 0xffffffff);
3616         I915_WRITE(EDP_PSR_IIR, 0xffffffff);
3617
3618         for_each_pipe(dev_priv, pipe)
3619                 if (intel_display_power_is_enabled(dev_priv,
3620                                                    POWER_DOMAIN_PIPE(pipe)))
3621                         GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
3622
3623         GEN3_IRQ_RESET(GEN8_DE_PORT_);
3624         GEN3_IRQ_RESET(GEN8_DE_MISC_);
3625         GEN3_IRQ_RESET(GEN8_PCU_);
3626
3627         if (HAS_PCH_SPLIT(dev_priv))
3628                 ibx_irq_reset(dev_priv);
3629 }
3630
3631 static void gen11_gt_irq_reset(struct drm_i915_private *dev_priv)
3632 {
3633         /* Disable RCS, BCS, VCS and VECS class engines. */
3634         I915_WRITE(GEN11_RENDER_COPY_INTR_ENABLE, 0);
3635         I915_WRITE(GEN11_VCS_VECS_INTR_ENABLE,    0);
3636
3637         /* Restore masks irqs on RCS, BCS, VCS and VECS engines. */
3638         I915_WRITE(GEN11_RCS0_RSVD_INTR_MASK,   ~0);
3639         I915_WRITE(GEN11_BCS_RSVD_INTR_MASK,    ~0);
3640         I915_WRITE(GEN11_VCS0_VCS1_INTR_MASK,   ~0);
3641         I915_WRITE(GEN11_VCS2_VCS3_INTR_MASK,   ~0);
3642         I915_WRITE(GEN11_VECS0_VECS1_INTR_MASK, ~0);
3643
3644         I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
3645         I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_MASK,  ~0);
3646 }
3647
3648 static void gen11_irq_reset(struct drm_device *dev)
3649 {
3650         struct drm_i915_private *dev_priv = dev->dev_private;
3651         int pipe;
3652
3653         I915_WRITE(GEN11_GFX_MSTR_IRQ, 0);
3654         POSTING_READ(GEN11_GFX_MSTR_IRQ);
3655
3656         gen11_gt_irq_reset(dev_priv);
3657
3658         I915_WRITE(GEN11_DISPLAY_INT_CTL, 0);
3659
3660         for_each_pipe(dev_priv, pipe)
3661                 if (intel_display_power_is_enabled(dev_priv,
3662                                                    POWER_DOMAIN_PIPE(pipe)))
3663                         GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
3664
3665         GEN3_IRQ_RESET(GEN8_DE_PORT_);
3666         GEN3_IRQ_RESET(GEN8_DE_MISC_);
3667         GEN3_IRQ_RESET(GEN11_DE_HPD_);
3668         GEN3_IRQ_RESET(GEN11_GU_MISC_);
3669         GEN3_IRQ_RESET(GEN8_PCU_);
3670
3671         if (HAS_PCH_ICP(dev_priv))
3672                 GEN3_IRQ_RESET(SDE);
3673 }
3674
3675 void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
3676                                      u8 pipe_mask)
3677 {
3678         uint32_t extra_ier = GEN8_PIPE_VBLANK | GEN8_PIPE_FIFO_UNDERRUN;
3679         enum pipe pipe;
3680
3681         spin_lock_irq(&dev_priv->irq_lock);
3682
3683         if (!intel_irqs_enabled(dev_priv)) {
3684                 spin_unlock_irq(&dev_priv->irq_lock);
3685                 return;
3686         }
3687
3688         for_each_pipe_masked(dev_priv, pipe, pipe_mask)
3689                 GEN8_IRQ_INIT_NDX(DE_PIPE, pipe,
3690                                   dev_priv->de_irq_mask[pipe],
3691                                   ~dev_priv->de_irq_mask[pipe] | extra_ier);
3692
3693         spin_unlock_irq(&dev_priv->irq_lock);
3694 }
3695
3696 void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv,
3697                                      u8 pipe_mask)
3698 {
3699         enum pipe pipe;
3700
3701         spin_lock_irq(&dev_priv->irq_lock);
3702
3703         if (!intel_irqs_enabled(dev_priv)) {
3704                 spin_unlock_irq(&dev_priv->irq_lock);
3705                 return;
3706         }
3707
3708         for_each_pipe_masked(dev_priv, pipe, pipe_mask)
3709                 GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
3710
3711         spin_unlock_irq(&dev_priv->irq_lock);
3712
3713         /* make sure we're done processing display irqs */
3714         synchronize_irq(dev_priv->drm.irq);
3715 }
3716
3717 static void cherryview_irq_reset(struct drm_device *dev)
3718 {
3719         struct drm_i915_private *dev_priv = to_i915(dev);
3720
3721         I915_WRITE(GEN8_MASTER_IRQ, 0);
3722         POSTING_READ(GEN8_MASTER_IRQ);
3723
3724         gen8_gt_irq_reset(dev_priv);
3725
3726         GEN3_IRQ_RESET(GEN8_PCU_);
3727
3728         spin_lock_irq(&dev_priv->irq_lock);
3729         if (dev_priv->display_irqs_enabled)
3730                 vlv_display_irq_reset(dev_priv);
3731         spin_unlock_irq(&dev_priv->irq_lock);
3732 }
3733
3734 static u32 intel_hpd_enabled_irqs(struct drm_i915_private *dev_priv,
3735                                   const u32 hpd[HPD_NUM_PINS])
3736 {
3737         struct intel_encoder *encoder;
3738         u32 enabled_irqs = 0;
3739
3740         for_each_intel_encoder(&dev_priv->drm, encoder)
3741                 if (dev_priv->hotplug.stats[encoder->hpd_pin].state == HPD_ENABLED)
3742                         enabled_irqs |= hpd[encoder->hpd_pin];
3743
3744         return enabled_irqs;
3745 }
3746
3747 static void ibx_hpd_detection_setup(struct drm_i915_private *dev_priv)
3748 {
3749         u32 hotplug;
3750
3751         /*
3752          * Enable digital hotplug on the PCH, and configure the DP short pulse
3753          * duration to 2ms (which is the minimum in the Display Port spec).
3754          * The pulse duration bits are reserved on LPT+.
3755          */
3756         hotplug = I915_READ(PCH_PORT_HOTPLUG);
3757         hotplug &= ~(PORTB_PULSE_DURATION_MASK |
3758                      PORTC_PULSE_DURATION_MASK |
3759                      PORTD_PULSE_DURATION_MASK);
3760         hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
3761         hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
3762         hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
3763         /*
3764          * When CPU and PCH are on the same package, port A
3765          * HPD must be enabled in both north and south.
3766          */
3767         if (HAS_PCH_LPT_LP(dev_priv))
3768                 hotplug |= PORTA_HOTPLUG_ENABLE;
3769         I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3770 }
3771
3772 static void ibx_hpd_irq_setup(struct drm_i915_private *dev_priv)
3773 {
3774         u32 hotplug_irqs, enabled_irqs;
3775
3776         if (HAS_PCH_IBX(dev_priv)) {
3777                 hotplug_irqs = SDE_HOTPLUG_MASK;
3778                 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_ibx);
3779         } else {
3780                 hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
3781                 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_cpt);
3782         }
3783
3784         ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3785
3786         ibx_hpd_detection_setup(dev_priv);
3787 }
3788
3789 static void icp_hpd_detection_setup(struct drm_i915_private *dev_priv)
3790 {
3791         u32 hotplug;
3792
3793         hotplug = I915_READ(SHOTPLUG_CTL_DDI);
3794         hotplug |= ICP_DDIA_HPD_ENABLE |
3795                    ICP_DDIB_HPD_ENABLE;
3796         I915_WRITE(SHOTPLUG_CTL_DDI, hotplug);
3797
3798         hotplug = I915_READ(SHOTPLUG_CTL_TC);
3799         hotplug |= ICP_TC_HPD_ENABLE(PORT_TC1) |
3800                    ICP_TC_HPD_ENABLE(PORT_TC2) |
3801                    ICP_TC_HPD_ENABLE(PORT_TC3) |
3802                    ICP_TC_HPD_ENABLE(PORT_TC4);
3803         I915_WRITE(SHOTPLUG_CTL_TC, hotplug);
3804 }
3805
3806 static void icp_hpd_irq_setup(struct drm_i915_private *dev_priv)
3807 {
3808         u32 hotplug_irqs, enabled_irqs;
3809
3810         hotplug_irqs = SDE_DDI_MASK_ICP | SDE_TC_MASK_ICP;
3811         enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_icp);
3812
3813         ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3814
3815         icp_hpd_detection_setup(dev_priv);
3816 }
3817
3818 static void gen11_hpd_detection_setup(struct drm_i915_private *dev_priv)
3819 {
3820         u32 hotplug;
3821
3822         hotplug = I915_READ(GEN11_TC_HOTPLUG_CTL);
3823         hotplug |= GEN11_HOTPLUG_CTL_ENABLE(PORT_TC1) |
3824                    GEN11_HOTPLUG_CTL_ENABLE(PORT_TC2) |
3825                    GEN11_HOTPLUG_CTL_ENABLE(PORT_TC3) |
3826                    GEN11_HOTPLUG_CTL_ENABLE(PORT_TC4);
3827         I915_WRITE(GEN11_TC_HOTPLUG_CTL, hotplug);
3828
3829         hotplug = I915_READ(GEN11_TBT_HOTPLUG_CTL);
3830         hotplug |= GEN11_HOTPLUG_CTL_ENABLE(PORT_TC1) |
3831                    GEN11_HOTPLUG_CTL_ENABLE(PORT_TC2) |
3832                    GEN11_HOTPLUG_CTL_ENABLE(PORT_TC3) |
3833                    GEN11_HOTPLUG_CTL_ENABLE(PORT_TC4);
3834         I915_WRITE(GEN11_TBT_HOTPLUG_CTL, hotplug);
3835 }
3836
3837 static void gen11_hpd_irq_setup(struct drm_i915_private *dev_priv)
3838 {
3839         u32 hotplug_irqs, enabled_irqs;
3840         u32 val;
3841
3842         enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_gen11);
3843         hotplug_irqs = GEN11_DE_TC_HOTPLUG_MASK | GEN11_DE_TBT_HOTPLUG_MASK;
3844
3845         val = I915_READ(GEN11_DE_HPD_IMR);
3846         val &= ~hotplug_irqs;
3847         I915_WRITE(GEN11_DE_HPD_IMR, val);
3848         POSTING_READ(GEN11_DE_HPD_IMR);
3849
3850         gen11_hpd_detection_setup(dev_priv);
3851
3852         if (HAS_PCH_ICP(dev_priv))
3853                 icp_hpd_irq_setup(dev_priv);
3854 }
3855
3856 static void spt_hpd_detection_setup(struct drm_i915_private *dev_priv)
3857 {
3858         u32 val, hotplug;
3859
3860         /* Display WA #1179 WaHardHangonHotPlug: cnp */
3861         if (HAS_PCH_CNP(dev_priv)) {
3862                 val = I915_READ(SOUTH_CHICKEN1);
3863                 val &= ~CHASSIS_CLK_REQ_DURATION_MASK;
3864                 val |= CHASSIS_CLK_REQ_DURATION(0xf);
3865                 I915_WRITE(SOUTH_CHICKEN1, val);
3866         }
3867
3868         /* Enable digital hotplug on the PCH */
3869         hotplug = I915_READ(PCH_PORT_HOTPLUG);
3870         hotplug |= PORTA_HOTPLUG_ENABLE |
3871                    PORTB_HOTPLUG_ENABLE |
3872                    PORTC_HOTPLUG_ENABLE |
3873                    PORTD_HOTPLUG_ENABLE;
3874         I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3875
3876         hotplug = I915_READ(PCH_PORT_HOTPLUG2);
3877         hotplug |= PORTE_HOTPLUG_ENABLE;
3878         I915_WRITE(PCH_PORT_HOTPLUG2, hotplug);
3879 }
3880
3881 static void spt_hpd_irq_setup(struct drm_i915_private *dev_priv)
3882 {
3883         u32 hotplug_irqs, enabled_irqs;
3884
3885         hotplug_irqs = SDE_HOTPLUG_MASK_SPT;
3886         enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_spt);
3887
3888         ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3889
3890         spt_hpd_detection_setup(dev_priv);
3891 }
3892
3893 static void ilk_hpd_detection_setup(struct drm_i915_private *dev_priv)
3894 {
3895         u32 hotplug;
3896
3897         /*
3898          * Enable digital hotplug on the CPU, and configure the DP short pulse
3899          * duration to 2ms (which is the minimum in the Display Port spec)
3900          * The pulse duration bits are reserved on HSW+.
3901          */
3902         hotplug = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
3903         hotplug &= ~DIGITAL_PORTA_PULSE_DURATION_MASK;
3904         hotplug |= DIGITAL_PORTA_HOTPLUG_ENABLE |
3905                    DIGITAL_PORTA_PULSE_DURATION_2ms;
3906         I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, hotplug);
3907 }
3908
3909 static void ilk_hpd_irq_setup(struct drm_i915_private *dev_priv)
3910 {
3911         u32 hotplug_irqs, enabled_irqs;
3912
3913         if (INTEL_GEN(dev_priv) >= 8) {
3914                 hotplug_irqs = GEN8_PORT_DP_A_HOTPLUG;
3915                 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_bdw);
3916
3917                 bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
3918         } else if (INTEL_GEN(dev_priv) >= 7) {
3919                 hotplug_irqs = DE_DP_A_HOTPLUG_IVB;
3920                 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_ivb);
3921
3922                 ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
3923         } else {
3924                 hotplug_irqs = DE_DP_A_HOTPLUG;
3925                 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_ilk);
3926
3927                 ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
3928         }
3929
3930         ilk_hpd_detection_setup(dev_priv);
3931
3932         ibx_hpd_irq_setup(dev_priv);
3933 }
3934
3935 static void __bxt_hpd_detection_setup(struct drm_i915_private *dev_priv,
3936                                       u32 enabled_irqs)
3937 {
3938         u32 hotplug;
3939
3940         hotplug = I915_READ(PCH_PORT_HOTPLUG);
3941         hotplug |= PORTA_HOTPLUG_ENABLE |
3942                    PORTB_HOTPLUG_ENABLE |
3943                    PORTC_HOTPLUG_ENABLE;
3944
3945         DRM_DEBUG_KMS("Invert bit setting: hp_ctl:%x hp_port:%x\n",
3946                       hotplug, enabled_irqs);
3947         hotplug &= ~BXT_DDI_HPD_INVERT_MASK;
3948
3949         /*
3950          * For BXT invert bit has to be set based on AOB design
3951          * for HPD detection logic, update it based on VBT fields.
3952          */
3953         if ((enabled_irqs & BXT_DE_PORT_HP_DDIA) &&
3954             intel_bios_is_port_hpd_inverted(dev_priv, PORT_A))
3955                 hotplug |= BXT_DDIA_HPD_INVERT;
3956         if ((enabled_irqs & BXT_DE_PORT_HP_DDIB) &&
3957             intel_bios_is_port_hpd_inverted(dev_priv, PORT_B))
3958                 hotplug |= BXT_DDIB_HPD_INVERT;
3959         if ((enabled_irqs & BXT_DE_PORT_HP_DDIC) &&
3960             intel_bios_is_port_hpd_inverted(dev_priv, PORT_C))
3961                 hotplug |= BXT_DDIC_HPD_INVERT;
3962
3963         I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3964 }
3965
3966 static void bxt_hpd_detection_setup(struct drm_i915_private *dev_priv)
3967 {
3968         __bxt_hpd_detection_setup(dev_priv, BXT_DE_PORT_HOTPLUG_MASK);
3969 }
3970
3971 static void bxt_hpd_irq_setup(struct drm_i915_private *dev_priv)
3972 {
3973         u32 hotplug_irqs, enabled_irqs;
3974
3975         enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_bxt);
3976         hotplug_irqs = BXT_DE_PORT_HOTPLUG_MASK;
3977
3978         bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
3979
3980         __bxt_hpd_detection_setup(dev_priv, enabled_irqs);
3981 }
3982
3983 static void ibx_irq_postinstall(struct drm_device *dev)
3984 {
3985         struct drm_i915_private *dev_priv = to_i915(dev);
3986         u32 mask;
3987
3988         if (HAS_PCH_NOP(dev_priv))
3989                 return;
3990
3991         if (HAS_PCH_IBX(dev_priv))
3992                 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON;
3993         else if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv))
3994                 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
3995         else
3996                 mask = SDE_GMBUS_CPT;
3997
3998         gen3_assert_iir_is_zero(dev_priv, SDEIIR);
3999         I915_WRITE(SDEIMR, ~mask);
4000
4001         if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv) ||
4002             HAS_PCH_LPT(dev_priv))
4003                 ibx_hpd_detection_setup(dev_priv);
4004         else
4005                 spt_hpd_detection_setup(dev_priv);
4006 }
4007
4008 static void gen5_gt_irq_postinstall(struct drm_device *dev)
4009 {
4010         struct drm_i915_private *dev_priv = to_i915(dev);
4011         u32 pm_irqs, gt_irqs;
4012
4013         pm_irqs = gt_irqs = 0;
4014
4015         dev_priv->gt_irq_mask = ~0;
4016         if (HAS_L3_DPF(dev_priv)) {
4017                 /* L3 parity interrupt is always unmasked. */
4018                 dev_priv->gt_irq_mask = ~GT_PARITY_ERROR(dev_priv);
4019                 gt_irqs |= GT_PARITY_ERROR(dev_priv);
4020         }
4021
4022         gt_irqs |= GT_RENDER_USER_INTERRUPT;
4023         if (IS_GEN5(dev_priv)) {
4024                 gt_irqs |= ILK_BSD_USER_INTERRUPT;
4025         } else {
4026                 gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
4027         }
4028
4029         GEN3_IRQ_INIT(GT, dev_priv->gt_irq_mask, gt_irqs);
4030
4031         if (INTEL_GEN(dev_priv) >= 6) {
4032                 /*
4033                  * RPS interrupts will get enabled/disabled on demand when RPS
4034                  * itself is enabled/disabled.
4035                  */
4036                 if (HAS_VEBOX(dev_priv)) {
4037                         pm_irqs |= PM_VEBOX_USER_INTERRUPT;
4038                         dev_priv->pm_ier |= PM_VEBOX_USER_INTERRUPT;
4039                 }
4040
4041                 dev_priv->pm_imr = 0xffffffff;
4042                 GEN3_IRQ_INIT(GEN6_PM, dev_priv->pm_imr, pm_irqs);
4043         }
4044 }
4045
4046 static int ironlake_irq_postinstall(struct drm_device *dev)
4047 {
4048         struct drm_i915_private *dev_priv = to_i915(dev);
4049         u32 display_mask, extra_mask;
4050
4051         if (INTEL_GEN(dev_priv) >= 7) {
4052                 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
4053                                 DE_PCH_EVENT_IVB | DE_AUX_CHANNEL_A_IVB);
4054                 extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |
4055                               DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB |
4056                               DE_DP_A_HOTPLUG_IVB);
4057         } else {
4058                 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
4059                                 DE_AUX_CHANNEL_A | DE_PIPEB_CRC_DONE |
4060                                 DE_PIPEA_CRC_DONE | DE_POISON);
4061                 extra_mask = (DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT |
4062                               DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN |
4063                               DE_DP_A_HOTPLUG);
4064         }
4065
4066         if (IS_HASWELL(dev_priv)) {
4067                 gen3_assert_iir_is_zero(dev_priv, EDP_PSR_IIR);
4068                 intel_psr_irq_control(dev_priv, dev_priv->psr.debug);
4069                 display_mask |= DE_EDP_PSR_INT_HSW;
4070         }
4071
4072         dev_priv->irq_mask = ~display_mask;
4073
4074         ibx_irq_pre_postinstall(dev);
4075
4076         GEN3_IRQ_INIT(DE, dev_priv->irq_mask, display_mask | extra_mask);
4077
4078         gen5_gt_irq_postinstall(dev);
4079
4080         ilk_hpd_detection_setup(dev_priv);
4081
4082         ibx_irq_postinstall(dev);
4083
4084         if (IS_IRONLAKE_M(dev_priv)) {
4085                 /* Enable PCU event interrupts
4086                  *
4087                  * spinlocking not required here for correctness since interrupt
4088                  * setup is guaranteed to run in single-threaded context. But we
4089                  * need it to make the assert_spin_locked happy. */
4090                 spin_lock_irq(&dev_priv->irq_lock);
4091                 ilk_enable_display_irq(dev_priv, DE_PCU_EVENT);
4092                 spin_unlock_irq(&dev_priv->irq_lock);
4093         }
4094
4095         return 0;
4096 }
4097
4098 void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv)
4099 {
4100         lockdep_assert_held(&dev_priv->irq_lock);
4101
4102         if (dev_priv->display_irqs_enabled)
4103                 return;
4104
4105         dev_priv->display_irqs_enabled = true;
4106
4107         if (intel_irqs_enabled(dev_priv)) {
4108                 vlv_display_irq_reset(dev_priv);
4109                 vlv_display_irq_postinstall(dev_priv);
4110         }
4111 }
4112
4113 void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
4114 {
4115         lockdep_assert_held(&dev_priv->irq_lock);
4116
4117         if (!dev_priv->display_irqs_enabled)
4118                 return;
4119
4120         dev_priv->display_irqs_enabled = false;
4121
4122         if (intel_irqs_enabled(dev_priv))
4123                 vlv_display_irq_reset(dev_priv);
4124 }
4125
4126
4127 static int valleyview_irq_postinstall(struct drm_device *dev)
4128 {
4129         struct drm_i915_private *dev_priv = to_i915(dev);
4130
4131         gen5_gt_irq_postinstall(dev);
4132
4133         spin_lock_irq(&dev_priv->irq_lock);
4134         if (dev_priv->display_irqs_enabled)
4135                 vlv_display_irq_postinstall(dev_priv);
4136         spin_unlock_irq(&dev_priv->irq_lock);
4137
4138         I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
4139         POSTING_READ(VLV_MASTER_IER);
4140
4141         return 0;
4142 }
4143
4144 static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv)
4145 {
4146         /* These are interrupts we'll toggle with the ring mask register */
4147         uint32_t gt_interrupts[] = {
4148                 GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
4149                         GT_CONTEXT_SWITCH_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
4150                         GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT |
4151                         GT_CONTEXT_SWITCH_INTERRUPT << GEN8_BCS_IRQ_SHIFT,
4152                 GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
4153                         GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
4154                         GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT |
4155                         GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS2_IRQ_SHIFT,
4156                 0,
4157                 GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT |
4158                         GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VECS_IRQ_SHIFT
4159                 };
4160
4161         if (HAS_L3_DPF(dev_priv))
4162                 gt_interrupts[0] |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
4163
4164         dev_priv->pm_ier = 0x0;
4165         dev_priv->pm_imr = ~dev_priv->pm_ier;
4166         GEN8_IRQ_INIT_NDX(GT, 0, ~gt_interrupts[0], gt_interrupts[0]);
4167         GEN8_IRQ_INIT_NDX(GT, 1, ~gt_interrupts[1], gt_interrupts[1]);
4168         /*
4169          * RPS interrupts will get enabled/disabled on demand when RPS itself
4170          * is enabled/disabled. Same wil be the case for GuC interrupts.
4171          */
4172         GEN8_IRQ_INIT_NDX(GT, 2, dev_priv->pm_imr, dev_priv->pm_ier);
4173         GEN8_IRQ_INIT_NDX(GT, 3, ~gt_interrupts[3], gt_interrupts[3]);
4174 }
4175
4176 static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
4177 {
4178         uint32_t de_pipe_masked = GEN8_PIPE_CDCLK_CRC_DONE;
4179         uint32_t de_pipe_enables;
4180         u32 de_port_masked = GEN8_AUX_CHANNEL_A;
4181         u32 de_port_enables;
4182         u32 de_misc_masked = GEN8_DE_EDP_PSR;
4183         enum pipe pipe;
4184
4185         if (INTEL_GEN(dev_priv) <= 10)
4186                 de_misc_masked |= GEN8_DE_MISC_GSE;
4187
4188         if (INTEL_GEN(dev_priv) >= 9) {
4189                 de_pipe_masked |= GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
4190                 de_port_masked |= GEN9_AUX_CHANNEL_B | GEN9_AUX_CHANNEL_C |
4191                                   GEN9_AUX_CHANNEL_D;
4192                 if (IS_GEN9_LP(dev_priv))
4193                         de_port_masked |= BXT_DE_PORT_GMBUS;
4194         } else {
4195                 de_pipe_masked |= GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
4196         }
4197
4198         if (INTEL_GEN(dev_priv) >= 11)
4199                 de_port_masked |= ICL_AUX_CHANNEL_E;
4200
4201         if (IS_CNL_WITH_PORT_F(dev_priv) || INTEL_GEN(dev_priv) >= 11)
4202                 de_port_masked |= CNL_AUX_CHANNEL_F;
4203
4204         de_pipe_enables = de_pipe_masked | GEN8_PIPE_VBLANK |
4205                                            GEN8_PIPE_FIFO_UNDERRUN;
4206
4207         de_port_enables = de_port_masked;
4208         if (IS_GEN9_LP(dev_priv))
4209                 de_port_enables |= BXT_DE_PORT_HOTPLUG_MASK;
4210         else if (IS_BROADWELL(dev_priv))
4211                 de_port_enables |= GEN8_PORT_DP_A_HOTPLUG;
4212
4213         gen3_assert_iir_is_zero(dev_priv, EDP_PSR_IIR);
4214         intel_psr_irq_control(dev_priv, dev_priv->psr.debug);
4215
4216         for_each_pipe(dev_priv, pipe) {
4217                 dev_priv->de_irq_mask[pipe] = ~de_pipe_masked;
4218
4219                 if (intel_display_power_is_enabled(dev_priv,
4220                                 POWER_DOMAIN_PIPE(pipe)))
4221                         GEN8_IRQ_INIT_NDX(DE_PIPE, pipe,
4222                                           dev_priv->de_irq_mask[pipe],
4223                                           de_pipe_enables);
4224         }
4225
4226         GEN3_IRQ_INIT(GEN8_DE_PORT_, ~de_port_masked, de_port_enables);
4227         GEN3_IRQ_INIT(GEN8_DE_MISC_, ~de_misc_masked, de_misc_masked);
4228
4229         if (INTEL_GEN(dev_priv) >= 11) {
4230                 u32 de_hpd_masked = 0;
4231                 u32 de_hpd_enables = GEN11_DE_TC_HOTPLUG_MASK |
4232                                      GEN11_DE_TBT_HOTPLUG_MASK;
4233
4234                 GEN3_IRQ_INIT(GEN11_DE_HPD_, ~de_hpd_masked, de_hpd_enables);
4235                 gen11_hpd_detection_setup(dev_priv);
4236         } else if (IS_GEN9_LP(dev_priv)) {
4237                 bxt_hpd_detection_setup(dev_priv);
4238         } else if (IS_BROADWELL(dev_priv)) {
4239                 ilk_hpd_detection_setup(dev_priv);
4240         }
4241 }
4242
4243 static int gen8_irq_postinstall(struct drm_device *dev)
4244 {
4245         struct drm_i915_private *dev_priv = to_i915(dev);
4246
4247         if (HAS_PCH_SPLIT(dev_priv))
4248                 ibx_irq_pre_postinstall(dev);
4249
4250         gen8_gt_irq_postinstall(dev_priv);
4251         gen8_de_irq_postinstall(dev_priv);
4252
4253         if (HAS_PCH_SPLIT(dev_priv))
4254                 ibx_irq_postinstall(dev);
4255
4256         I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
4257         POSTING_READ(GEN8_MASTER_IRQ);
4258
4259         return 0;
4260 }
4261
4262 static void gen11_gt_irq_postinstall(struct drm_i915_private *dev_priv)
4263 {
4264         const u32 irqs = GT_RENDER_USER_INTERRUPT | GT_CONTEXT_SWITCH_INTERRUPT;
4265
4266         BUILD_BUG_ON(irqs & 0xffff0000);
4267
4268         /* Enable RCS, BCS, VCS and VECS class interrupts. */
4269         I915_WRITE(GEN11_RENDER_COPY_INTR_ENABLE, irqs << 16 | irqs);
4270         I915_WRITE(GEN11_VCS_VECS_INTR_ENABLE,    irqs << 16 | irqs);
4271
4272         /* Unmask irqs on RCS, BCS, VCS and VECS engines. */
4273         I915_WRITE(GEN11_RCS0_RSVD_INTR_MASK,   ~(irqs << 16));
4274         I915_WRITE(GEN11_BCS_RSVD_INTR_MASK,    ~(irqs << 16));
4275         I915_WRITE(GEN11_VCS0_VCS1_INTR_MASK,   ~(irqs | irqs << 16));
4276         I915_WRITE(GEN11_VCS2_VCS3_INTR_MASK,   ~(irqs | irqs << 16));
4277         I915_WRITE(GEN11_VECS0_VECS1_INTR_MASK, ~(irqs | irqs << 16));
4278
4279         /*
4280          * RPS interrupts will get enabled/disabled on demand when RPS itself
4281          * is enabled/disabled.
4282          */
4283         dev_priv->pm_ier = 0x0;
4284         dev_priv->pm_imr = ~dev_priv->pm_ier;
4285         I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
4286         I915_WRITE(GEN11_GPM_WGBOXPERF_INTR_MASK,  ~0);
4287 }
4288
4289 static void icp_irq_postinstall(struct drm_device *dev)
4290 {
4291         struct drm_i915_private *dev_priv = to_i915(dev);
4292         u32 mask = SDE_GMBUS_ICP;
4293
4294         WARN_ON(I915_READ(SDEIER) != 0);
4295         I915_WRITE(SDEIER, 0xffffffff);
4296         POSTING_READ(SDEIER);
4297
4298         gen3_assert_iir_is_zero(dev_priv, SDEIIR);
4299         I915_WRITE(SDEIMR, ~mask);
4300
4301         icp_hpd_detection_setup(dev_priv);
4302 }
4303
4304 static int gen11_irq_postinstall(struct drm_device *dev)
4305 {
4306         struct drm_i915_private *dev_priv = dev->dev_private;
4307         u32 gu_misc_masked = GEN11_GU_MISC_GSE;
4308
4309         if (HAS_PCH_ICP(dev_priv))
4310                 icp_irq_postinstall(dev);
4311
4312         gen11_gt_irq_postinstall(dev_priv);
4313         gen8_de_irq_postinstall(dev_priv);
4314
4315         GEN3_IRQ_INIT(GEN11_GU_MISC_, ~gu_misc_masked, gu_misc_masked);
4316
4317         I915_WRITE(GEN11_DISPLAY_INT_CTL, GEN11_DISPLAY_IRQ_ENABLE);
4318
4319         I915_WRITE(GEN11_GFX_MSTR_IRQ, GEN11_MASTER_IRQ);
4320         POSTING_READ(GEN11_GFX_MSTR_IRQ);
4321
4322         return 0;
4323 }
4324
4325 static int cherryview_irq_postinstall(struct drm_device *dev)
4326 {
4327         struct drm_i915_private *dev_priv = to_i915(dev);
4328
4329         gen8_gt_irq_postinstall(dev_priv);
4330
4331         spin_lock_irq(&dev_priv->irq_lock);
4332         if (dev_priv->display_irqs_enabled)
4333                 vlv_display_irq_postinstall(dev_priv);
4334         spin_unlock_irq(&dev_priv->irq_lock);
4335
4336         I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
4337         POSTING_READ(GEN8_MASTER_IRQ);
4338
4339         return 0;
4340 }
4341
4342 static void i8xx_irq_reset(struct drm_device *dev)
4343 {
4344         struct drm_i915_private *dev_priv = to_i915(dev);
4345
4346         i9xx_pipestat_irq_reset(dev_priv);
4347
4348         I915_WRITE16(HWSTAM, 0xffff);
4349
4350         GEN2_IRQ_RESET();
4351 }
4352
4353 static int i8xx_irq_postinstall(struct drm_device *dev)
4354 {
4355         struct drm_i915_private *dev_priv = to_i915(dev);
4356         u16 enable_mask;
4357
4358         I915_WRITE16(EMR, ~(I915_ERROR_PAGE_TABLE |
4359                             I915_ERROR_MEMORY_REFRESH));
4360
4361         /* Unmask the interrupts that we always want on. */
4362         dev_priv->irq_mask =
4363                 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4364                   I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4365                   I915_MASTER_ERROR_INTERRUPT);
4366
4367         enable_mask =
4368                 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4369                 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4370                 I915_MASTER_ERROR_INTERRUPT |
4371                 I915_USER_INTERRUPT;
4372
4373         GEN2_IRQ_INIT(, dev_priv->irq_mask, enable_mask);
4374
4375         /* Interrupt setup is already guaranteed to be single-threaded, this is
4376          * just to make the assert_spin_locked check happy. */
4377         spin_lock_irq(&dev_priv->irq_lock);
4378         i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
4379         i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
4380         spin_unlock_irq(&dev_priv->irq_lock);
4381
4382         return 0;
4383 }
4384
4385 static void i8xx_error_irq_ack(struct drm_i915_private *dev_priv,
4386                                u16 *eir, u16 *eir_stuck)
4387 {
4388         u16 emr;
4389
4390         *eir = I915_READ16(EIR);
4391
4392         if (*eir)
4393                 I915_WRITE16(EIR, *eir);
4394
4395         *eir_stuck = I915_READ16(EIR);
4396         if (*eir_stuck == 0)
4397                 return;
4398
4399         /*
4400          * Toggle all EMR bits to make sure we get an edge
4401          * in the ISR master error bit if we don't clear
4402          * all the EIR bits. Otherwise the edge triggered
4403          * IIR on i965/g4x wouldn't notice that an interrupt
4404          * is still pending. Also some EIR bits can't be
4405          * cleared except by handling the underlying error
4406          * (or by a GPU reset) so we mask any bit that
4407          * remains set.
4408          */
4409         emr = I915_READ16(EMR);
4410         I915_WRITE16(EMR, 0xffff);
4411         I915_WRITE16(EMR, emr | *eir_stuck);
4412 }
4413
4414 static void i8xx_error_irq_handler(struct drm_i915_private *dev_priv,
4415                                    u16 eir, u16 eir_stuck)
4416 {
4417         DRM_DEBUG("Master Error: EIR 0x%04x\n", eir);
4418
4419         if (eir_stuck)
4420                 DRM_DEBUG_DRIVER("EIR stuck: 0x%04x, masked\n", eir_stuck);
4421 }
4422
4423 static void i9xx_error_irq_ack(struct drm_i915_private *dev_priv,
4424                                u32 *eir, u32 *eir_stuck)
4425 {
4426         u32 emr;
4427
4428         *eir = I915_READ(EIR);
4429
4430         I915_WRITE(EIR, *eir);
4431
4432         *eir_stuck = I915_READ(EIR);
4433         if (*eir_stuck == 0)
4434                 return;
4435
4436         /*
4437          * Toggle all EMR bits to make sure we get an edge
4438          * in the ISR master error bit if we don't clear
4439          * all the EIR bits. Otherwise the edge triggered
4440          * IIR on i965/g4x wouldn't notice that an interrupt
4441          * is still pending. Also some EIR bits can't be
4442          * cleared except by handling the underlying error
4443          * (or by a GPU reset) so we mask any bit that
4444          * remains set.
4445          */
4446         emr = I915_READ(EMR);
4447         I915_WRITE(EMR, 0xffffffff);
4448         I915_WRITE(EMR, emr | *eir_stuck);
4449 }
4450
4451 static void i9xx_error_irq_handler(struct drm_i915_private *dev_priv,
4452                                    u32 eir, u32 eir_stuck)
4453 {
4454         DRM_DEBUG("Master Error, EIR 0x%08x\n", eir);
4455
4456         if (eir_stuck)
4457                 DRM_DEBUG_DRIVER("EIR stuck: 0x%08x, masked\n", eir_stuck);
4458 }
4459
4460 static irqreturn_t i8xx_irq_handler(int irq, void *arg)
4461 {
4462         struct drm_device *dev = arg;
4463         struct drm_i915_private *dev_priv = to_i915(dev);
4464         irqreturn_t ret = IRQ_NONE;
4465
4466         if (!intel_irqs_enabled(dev_priv))
4467                 return IRQ_NONE;
4468
4469         /* IRQs are synced during runtime_suspend, we don't require a wakeref */
4470         disable_rpm_wakeref_asserts(dev_priv);
4471
4472         do {
4473                 u32 pipe_stats[I915_MAX_PIPES] = {};
4474                 u16 eir = 0, eir_stuck = 0;
4475                 u16 iir;
4476
4477                 iir = I915_READ16(IIR);
4478                 if (iir == 0)
4479                         break;
4480
4481                 ret = IRQ_HANDLED;
4482
4483                 /* Call regardless, as some status bits might not be
4484                  * signalled in iir */
4485                 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
4486
4487                 if (iir & I915_MASTER_ERROR_INTERRUPT)
4488                         i8xx_error_irq_ack(dev_priv, &eir, &eir_stuck);
4489
4490                 I915_WRITE16(IIR, iir);
4491
4492                 if (iir & I915_USER_INTERRUPT)
4493                         notify_ring(dev_priv->engine[RCS]);
4494
4495                 if (iir & I915_MASTER_ERROR_INTERRUPT)
4496                         i8xx_error_irq_handler(dev_priv, eir, eir_stuck);
4497
4498                 i8xx_pipestat_irq_handler(dev_priv, iir, pipe_stats);
4499         } while (0);
4500
4501         enable_rpm_wakeref_asserts(dev_priv);
4502
4503         return ret;
4504 }
4505
4506 static void i915_irq_reset(struct drm_device *dev)
4507 {
4508         struct drm_i915_private *dev_priv = to_i915(dev);
4509
4510         if (I915_HAS_HOTPLUG(dev_priv)) {
4511                 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4512                 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4513         }
4514
4515         i9xx_pipestat_irq_reset(dev_priv);
4516
4517         I915_WRITE(HWSTAM, 0xffffffff);
4518
4519         GEN3_IRQ_RESET();
4520 }
4521
4522 static int i915_irq_postinstall(struct drm_device *dev)
4523 {
4524         struct drm_i915_private *dev_priv = to_i915(dev);
4525         u32 enable_mask;
4526
4527         I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE |
4528                           I915_ERROR_MEMORY_REFRESH));
4529
4530         /* Unmask the interrupts that we always want on. */
4531         dev_priv->irq_mask =
4532                 ~(I915_ASLE_INTERRUPT |
4533                   I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4534                   I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4535                   I915_MASTER_ERROR_INTERRUPT);
4536
4537         enable_mask =
4538                 I915_ASLE_INTERRUPT |
4539                 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4540                 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4541                 I915_MASTER_ERROR_INTERRUPT |
4542                 I915_USER_INTERRUPT;
4543
4544         if (I915_HAS_HOTPLUG(dev_priv)) {
4545                 /* Enable in IER... */
4546                 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
4547                 /* and unmask in IMR */
4548                 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
4549         }
4550
4551         GEN3_IRQ_INIT(, dev_priv->irq_mask, enable_mask);
4552
4553         /* Interrupt setup is already guaranteed to be single-threaded, this is
4554          * just to make the assert_spin_locked check happy. */
4555         spin_lock_irq(&dev_priv->irq_lock);
4556         i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
4557         i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
4558         spin_unlock_irq(&dev_priv->irq_lock);
4559
4560         i915_enable_asle_pipestat(dev_priv);
4561
4562         return 0;
4563 }
4564
4565 static irqreturn_t i915_irq_handler(int irq, void *arg)
4566 {
4567         struct drm_device *dev = arg;
4568         struct drm_i915_private *dev_priv = to_i915(dev);
4569         irqreturn_t ret = IRQ_NONE;
4570
4571         if (!intel_irqs_enabled(dev_priv))
4572                 return IRQ_NONE;
4573
4574         /* IRQs are synced during runtime_suspend, we don't require a wakeref */
4575         disable_rpm_wakeref_asserts(dev_priv);
4576
4577         do {
4578                 u32 pipe_stats[I915_MAX_PIPES] = {};
4579                 u32 eir = 0, eir_stuck = 0;
4580                 u32 hotplug_status = 0;
4581                 u32 iir;
4582
4583                 iir = I915_READ(IIR);
4584                 if (iir == 0)
4585                         break;
4586
4587                 ret = IRQ_HANDLED;
4588
4589                 if (I915_HAS_HOTPLUG(dev_priv) &&
4590                     iir & I915_DISPLAY_PORT_INTERRUPT)
4591                         hotplug_status = i9xx_hpd_irq_ack(dev_priv);
4592
4593                 /* Call regardless, as some status bits might not be
4594                  * signalled in iir */
4595                 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
4596
4597                 if (iir & I915_MASTER_ERROR_INTERRUPT)
4598                         i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck);
4599
4600                 I915_WRITE(IIR, iir);
4601
4602                 if (iir & I915_USER_INTERRUPT)
4603                         notify_ring(dev_priv->engine[RCS]);
4604
4605                 if (iir & I915_MASTER_ERROR_INTERRUPT)
4606                         i9xx_error_irq_handler(dev_priv, eir, eir_stuck);
4607
4608                 if (hotplug_status)
4609                         i9xx_hpd_irq_handler(dev_priv, hotplug_status);
4610
4611                 i915_pipestat_irq_handler(dev_priv, iir, pipe_stats);
4612         } while (0);
4613
4614         enable_rpm_wakeref_asserts(dev_priv);
4615
4616         return ret;
4617 }
4618
4619 static void i965_irq_reset(struct drm_device *dev)
4620 {
4621         struct drm_i915_private *dev_priv = to_i915(dev);
4622
4623         i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4624         I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4625
4626         i9xx_pipestat_irq_reset(dev_priv);
4627
4628         I915_WRITE(HWSTAM, 0xffffffff);
4629
4630         GEN3_IRQ_RESET();
4631 }
4632
4633 static int i965_irq_postinstall(struct drm_device *dev)
4634 {
4635         struct drm_i915_private *dev_priv = to_i915(dev);
4636         u32 enable_mask;
4637         u32 error_mask;
4638
4639         /*
4640          * Enable some error detection, note the instruction error mask
4641          * bit is reserved, so we leave it masked.
4642          */
4643         if (IS_G4X(dev_priv)) {
4644                 error_mask = ~(GM45_ERROR_PAGE_TABLE |
4645                                GM45_ERROR_MEM_PRIV |
4646                                GM45_ERROR_CP_PRIV |
4647                                I915_ERROR_MEMORY_REFRESH);
4648         } else {
4649                 error_mask = ~(I915_ERROR_PAGE_TABLE |
4650                                I915_ERROR_MEMORY_REFRESH);
4651         }
4652         I915_WRITE(EMR, error_mask);
4653
4654         /* Unmask the interrupts that we always want on. */
4655         dev_priv->irq_mask =
4656                 ~(I915_ASLE_INTERRUPT |
4657                   I915_DISPLAY_PORT_INTERRUPT |
4658                   I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4659                   I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4660                   I915_MASTER_ERROR_INTERRUPT);
4661
4662         enable_mask =
4663                 I915_ASLE_INTERRUPT |
4664                 I915_DISPLAY_PORT_INTERRUPT |
4665                 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4666                 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4667                 I915_MASTER_ERROR_INTERRUPT |
4668                 I915_USER_INTERRUPT;
4669
4670         if (IS_G4X(dev_priv))
4671                 enable_mask |= I915_BSD_USER_INTERRUPT;
4672
4673         GEN3_IRQ_INIT(, dev_priv->irq_mask, enable_mask);
4674
4675         /* Interrupt setup is already guaranteed to be single-threaded, this is
4676          * just to make the assert_spin_locked check happy. */
4677         spin_lock_irq(&dev_priv->irq_lock);
4678         i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
4679         i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
4680         i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
4681         spin_unlock_irq(&dev_priv->irq_lock);
4682
4683         i915_enable_asle_pipestat(dev_priv);
4684
4685         return 0;
4686 }
4687
4688 static void i915_hpd_irq_setup(struct drm_i915_private *dev_priv)
4689 {
4690         u32 hotplug_en;
4691
4692         lockdep_assert_held(&dev_priv->irq_lock);
4693
4694         /* Note HDMI and DP share hotplug bits */
4695         /* enable bits are the same for all generations */
4696         hotplug_en = intel_hpd_enabled_irqs(dev_priv, hpd_mask_i915);
4697         /* Programming the CRT detection parameters tends
4698            to generate a spurious hotplug event about three
4699            seconds later.  So just do it once.
4700         */
4701         if (IS_G4X(dev_priv))
4702                 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
4703         hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
4704
4705         /* Ignore TV since it's buggy */
4706         i915_hotplug_interrupt_update_locked(dev_priv,
4707                                              HOTPLUG_INT_EN_MASK |
4708                                              CRT_HOTPLUG_VOLTAGE_COMPARE_MASK |
4709                                              CRT_HOTPLUG_ACTIVATION_PERIOD_64,
4710                                              hotplug_en);
4711 }
4712
4713 static irqreturn_t i965_irq_handler(int irq, void *arg)
4714 {
4715         struct drm_device *dev = arg;
4716         struct drm_i915_private *dev_priv = to_i915(dev);
4717         irqreturn_t ret = IRQ_NONE;
4718
4719         if (!intel_irqs_enabled(dev_priv))
4720                 return IRQ_NONE;
4721
4722         /* IRQs are synced during runtime_suspend, we don't require a wakeref */
4723         disable_rpm_wakeref_asserts(dev_priv);
4724
4725         do {
4726                 u32 pipe_stats[I915_MAX_PIPES] = {};
4727                 u32 eir = 0, eir_stuck = 0;
4728                 u32 hotplug_status = 0;
4729                 u32 iir;
4730
4731                 iir = I915_READ(IIR);
4732                 if (iir == 0)
4733                         break;
4734
4735                 ret = IRQ_HANDLED;
4736
4737                 if (iir & I915_DISPLAY_PORT_INTERRUPT)
4738                         hotplug_status = i9xx_hpd_irq_ack(dev_priv);
4739
4740                 /* Call regardless, as some status bits might not be
4741                  * signalled in iir */
4742                 i9xx_pipestat_irq_ack(dev_priv, iir, pipe_stats);
4743
4744                 if (iir & I915_MASTER_ERROR_INTERRUPT)
4745                         i9xx_error_irq_ack(dev_priv, &eir, &eir_stuck);
4746
4747                 I915_WRITE(IIR, iir);
4748
4749                 if (iir & I915_USER_INTERRUPT)
4750                         notify_ring(dev_priv->engine[RCS]);
4751
4752                 if (iir & I915_BSD_USER_INTERRUPT)
4753                         notify_ring(dev_priv->engine[VCS]);
4754
4755                 if (iir & I915_MASTER_ERROR_INTERRUPT)
4756                         i9xx_error_irq_handler(dev_priv, eir, eir_stuck);
4757
4758                 if (hotplug_status)
4759                         i9xx_hpd_irq_handler(dev_priv, hotplug_status);
4760
4761                 i965_pipestat_irq_handler(dev_priv, iir, pipe_stats);
4762         } while (0);
4763
4764         enable_rpm_wakeref_asserts(dev_priv);
4765
4766         return ret;
4767 }
4768
4769 /**
4770  * intel_irq_init - initializes irq support
4771  * @dev_priv: i915 device instance
4772  *
4773  * This function initializes all the irq support including work items, timers
4774  * and all the vtables. It does not setup the interrupt itself though.
4775  */
4776 void intel_irq_init(struct drm_i915_private *dev_priv)
4777 {
4778         struct drm_device *dev = &dev_priv->drm;
4779         struct intel_rps *rps = &dev_priv->gt_pm.rps;
4780         int i;
4781
4782         intel_hpd_init_work(dev_priv);
4783
4784         INIT_WORK(&rps->work, gen6_pm_rps_work);
4785
4786         INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
4787         for (i = 0; i < MAX_L3_SLICES; ++i)
4788                 dev_priv->l3_parity.remap_info[i] = NULL;
4789
4790         if (HAS_GUC_SCHED(dev_priv))
4791                 dev_priv->pm_guc_events = GEN9_GUC_TO_HOST_INT_EVENT;
4792
4793         /* Let's track the enabled rps events */
4794         if (IS_VALLEYVIEW(dev_priv))
4795                 /* WaGsvRC0ResidencyMethod:vlv */
4796                 dev_priv->pm_rps_events = GEN6_PM_RP_UP_EI_EXPIRED;
4797         else
4798                 dev_priv->pm_rps_events = (GEN6_PM_RP_UP_THRESHOLD |
4799                                            GEN6_PM_RP_DOWN_THRESHOLD |
4800                                            GEN6_PM_RP_DOWN_TIMEOUT);
4801
4802         rps->pm_intrmsk_mbz = 0;
4803
4804         /*
4805          * SNB,IVB,HSW can while VLV,CHV may hard hang on looping batchbuffer
4806          * if GEN6_PM_UP_EI_EXPIRED is masked.
4807          *
4808          * TODO: verify if this can be reproduced on VLV,CHV.
4809          */
4810         if (INTEL_GEN(dev_priv) <= 7)
4811                 rps->pm_intrmsk_mbz |= GEN6_PM_RP_UP_EI_EXPIRED;
4812
4813         if (INTEL_GEN(dev_priv) >= 8)
4814                 rps->pm_intrmsk_mbz |= GEN8_PMINTR_DISABLE_REDIRECT_TO_GUC;
4815
4816         if (IS_GEN2(dev_priv)) {
4817                 /* Gen2 doesn't have a hardware frame counter */
4818                 dev->max_vblank_count = 0;
4819         } else if (IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5) {
4820                 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
4821                 dev->driver->get_vblank_counter = g4x_get_vblank_counter;
4822         } else {
4823                 dev->driver->get_vblank_counter = i915_get_vblank_counter;
4824                 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
4825         }
4826
4827         /*
4828          * Opt out of the vblank disable timer on everything except gen2.
4829          * Gen2 doesn't have a hardware frame counter and so depends on
4830          * vblank interrupts to produce sane vblank seuquence numbers.
4831          */
4832         if (!IS_GEN2(dev_priv))
4833                 dev->vblank_disable_immediate = true;
4834
4835         /* Most platforms treat the display irq block as an always-on
4836          * power domain. vlv/chv can disable it at runtime and need
4837          * special care to avoid writing any of the display block registers
4838          * outside of the power domain. We defer setting up the display irqs
4839          * in this case to the runtime pm.
4840          */
4841         dev_priv->display_irqs_enabled = true;
4842         if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
4843                 dev_priv->display_irqs_enabled = false;
4844
4845         dev_priv->hotplug.hpd_storm_threshold = HPD_STORM_DEFAULT_THRESHOLD;
4846
4847         dev->driver->get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos;
4848         dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
4849
4850         if (IS_CHERRYVIEW(dev_priv)) {
4851                 dev->driver->irq_handler = cherryview_irq_handler;
4852                 dev->driver->irq_preinstall = cherryview_irq_reset;
4853                 dev->driver->irq_postinstall = cherryview_irq_postinstall;
4854                 dev->driver->irq_uninstall = cherryview_irq_reset;
4855                 dev->driver->enable_vblank = i965_enable_vblank;
4856                 dev->driver->disable_vblank = i965_disable_vblank;
4857                 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4858         } else if (IS_VALLEYVIEW(dev_priv)) {
4859                 dev->driver->irq_handler = valleyview_irq_handler;
4860                 dev->driver->irq_preinstall = valleyview_irq_reset;
4861                 dev->driver->irq_postinstall = valleyview_irq_postinstall;
4862                 dev->driver->irq_uninstall = valleyview_irq_reset;
4863                 dev->driver->enable_vblank = i965_enable_vblank;
4864                 dev->driver->disable_vblank = i965_disable_vblank;
4865                 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4866         } else if (INTEL_GEN(dev_priv) >= 11) {
4867                 dev->driver->irq_handler = gen11_irq_handler;
4868                 dev->driver->irq_preinstall = gen11_irq_reset;
4869                 dev->driver->irq_postinstall = gen11_irq_postinstall;
4870                 dev->driver->irq_uninstall = gen11_irq_reset;
4871                 dev->driver->enable_vblank = gen8_enable_vblank;
4872                 dev->driver->disable_vblank = gen8_disable_vblank;
4873                 dev_priv->display.hpd_irq_setup = gen11_hpd_irq_setup;
4874         } else if (INTEL_GEN(dev_priv) >= 8) {
4875                 dev->driver->irq_handler = gen8_irq_handler;
4876                 dev->driver->irq_preinstall = gen8_irq_reset;
4877                 dev->driver->irq_postinstall = gen8_irq_postinstall;
4878                 dev->driver->irq_uninstall = gen8_irq_reset;
4879                 dev->driver->enable_vblank = gen8_enable_vblank;
4880                 dev->driver->disable_vblank = gen8_disable_vblank;
4881                 if (IS_GEN9_LP(dev_priv))
4882                         dev_priv->display.hpd_irq_setup = bxt_hpd_irq_setup;
4883                 else if (HAS_PCH_SPT(dev_priv) || HAS_PCH_KBP(dev_priv) ||
4884                          HAS_PCH_CNP(dev_priv))
4885                         dev_priv->display.hpd_irq_setup = spt_hpd_irq_setup;
4886                 else
4887                         dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
4888         } else if (HAS_PCH_SPLIT(dev_priv)) {
4889                 dev->driver->irq_handler = ironlake_irq_handler;
4890                 dev->driver->irq_preinstall = ironlake_irq_reset;
4891                 dev->driver->irq_postinstall = ironlake_irq_postinstall;
4892                 dev->driver->irq_uninstall = ironlake_irq_reset;
4893                 dev->driver->enable_vblank = ironlake_enable_vblank;
4894                 dev->driver->disable_vblank = ironlake_disable_vblank;
4895                 dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
4896         } else {
4897                 if (IS_GEN2(dev_priv)) {
4898                         dev->driver->irq_preinstall = i8xx_irq_reset;
4899                         dev->driver->irq_postinstall = i8xx_irq_postinstall;
4900                         dev->driver->irq_handler = i8xx_irq_handler;
4901                         dev->driver->irq_uninstall = i8xx_irq_reset;
4902                         dev->driver->enable_vblank = i8xx_enable_vblank;
4903                         dev->driver->disable_vblank = i8xx_disable_vblank;
4904                 } else if (IS_GEN3(dev_priv)) {
4905                         dev->driver->irq_preinstall = i915_irq_reset;
4906                         dev->driver->irq_postinstall = i915_irq_postinstall;
4907                         dev->driver->irq_uninstall = i915_irq_reset;
4908                         dev->driver->irq_handler = i915_irq_handler;
4909                         dev->driver->enable_vblank = i8xx_enable_vblank;
4910                         dev->driver->disable_vblank = i8xx_disable_vblank;
4911                 } else {
4912                         dev->driver->irq_preinstall = i965_irq_reset;
4913                         dev->driver->irq_postinstall = i965_irq_postinstall;
4914                         dev->driver->irq_uninstall = i965_irq_reset;
4915                         dev->driver->irq_handler = i965_irq_handler;
4916                         dev->driver->enable_vblank = i965_enable_vblank;
4917                         dev->driver->disable_vblank = i965_disable_vblank;
4918                 }
4919                 if (I915_HAS_HOTPLUG(dev_priv))
4920                         dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4921         }
4922 }
4923
4924 /**
4925  * intel_irq_fini - deinitializes IRQ support
4926  * @i915: i915 device instance
4927  *
4928  * This function deinitializes all the IRQ support.
4929  */
4930 void intel_irq_fini(struct drm_i915_private *i915)
4931 {
4932         int i;
4933
4934         for (i = 0; i < MAX_L3_SLICES; ++i)
4935                 kfree(i915->l3_parity.remap_info[i]);
4936 }
4937
4938 /**
4939  * intel_irq_install - enables the hardware interrupt
4940  * @dev_priv: i915 device instance
4941  *
4942  * This function enables the hardware interrupt handling, but leaves the hotplug
4943  * handling still disabled. It is called after intel_irq_init().
4944  *
4945  * In the driver load and resume code we need working interrupts in a few places
4946  * but don't want to deal with the hassle of concurrent probe and hotplug
4947  * workers. Hence the split into this two-stage approach.
4948  */
4949 int intel_irq_install(struct drm_i915_private *dev_priv)
4950 {
4951         /*
4952          * We enable some interrupt sources in our postinstall hooks, so mark
4953          * interrupts as enabled _before_ actually enabling them to avoid
4954          * special cases in our ordering checks.
4955          */
4956         dev_priv->runtime_pm.irqs_enabled = true;
4957
4958         return drm_irq_install(&dev_priv->drm, dev_priv->drm.pdev->irq);
4959 }
4960
4961 /**
4962  * intel_irq_uninstall - finilizes all irq handling
4963  * @dev_priv: i915 device instance
4964  *
4965  * This stops interrupt and hotplug handling and unregisters and frees all
4966  * resources acquired in the init functions.
4967  */
4968 void intel_irq_uninstall(struct drm_i915_private *dev_priv)
4969 {
4970         drm_irq_uninstall(&dev_priv->drm);
4971         intel_hpd_cancel_work(dev_priv);
4972         dev_priv->runtime_pm.irqs_enabled = false;
4973 }
4974
4975 /**
4976  * intel_runtime_pm_disable_interrupts - runtime interrupt disabling
4977  * @dev_priv: i915 device instance
4978  *
4979  * This function is used to disable interrupts at runtime, both in the runtime
4980  * pm and the system suspend/resume code.
4981  */
4982 void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv)
4983 {
4984         dev_priv->drm.driver->irq_uninstall(&dev_priv->drm);
4985         dev_priv->runtime_pm.irqs_enabled = false;
4986         synchronize_irq(dev_priv->drm.irq);
4987 }
4988
4989 /**
4990  * intel_runtime_pm_enable_interrupts - runtime interrupt enabling
4991  * @dev_priv: i915 device instance
4992  *
4993  * This function is used to enable interrupts at runtime, both in the runtime
4994  * pm and the system suspend/resume code.
4995  */
4996 void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv)
4997 {
4998         dev_priv->runtime_pm.irqs_enabled = true;
4999         dev_priv->drm.driver->irq_preinstall(&dev_priv->drm);
5000         dev_priv->drm.driver->irq_postinstall(&dev_priv->drm);
5001 }