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 <drm/drmP.h>
  34 #include <drm/i915_drm.h>
  35 #include "i915_drv.h"
  36 #include "i915_trace.h"
  37 #include "intel_drv.h"
  38
  39 /* For display hotplug interrupt */
  40 static void
  41 ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
  42 {
  43         if ((dev_priv->irq_mask & mask) != 0) {
  44                 dev_priv->irq_mask &= ~mask;
  45                 I915_WRITE(DEIMR, dev_priv->irq_mask);
  46                 POSTING_READ(DEIMR);
  47         }
  48 }
  49
  50 static inline void
  51 ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
  52 {
  53         if ((dev_priv->irq_mask & mask) != mask) {
  54                 dev_priv->irq_mask |= mask;
  55                 I915_WRITE(DEIMR, dev_priv->irq_mask);
  56                 POSTING_READ(DEIMR);
  57         }
  58 }
  59
  60 void
  61 i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
  62 {
  63         if ((dev_priv->pipestat[pipe] & mask) != mask) {
  64                 u32 reg = PIPESTAT(pipe);
  65
  66                 dev_priv->pipestat[pipe] |= mask;
  67                 /* Enable the interrupt, clear any pending status */
  68                 I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16));
  69                 POSTING_READ(reg);
  70         }
  71 }
  72
  73 void
  74 i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
  75 {
  76         if ((dev_priv->pipestat[pipe] & mask) != 0) {
  77                 u32 reg = PIPESTAT(pipe);
  78
  79                 dev_priv->pipestat[pipe] &= ~mask;
  80                 I915_WRITE(reg, dev_priv->pipestat[pipe]);
  81                 POSTING_READ(reg);
  82         }
  83 }
  84
  85 /**
  86  * intel_enable_asle - enable ASLE interrupt for OpRegion
  87  */
  88 void intel_enable_asle(struct drm_device *dev)
  89 {
  90         drm_i915_private_t *dev_priv = dev->dev_private;
  91         unsigned long irqflags;
  92
  93         /* FIXME: opregion/asle for VLV */
  94         if (IS_VALLEYVIEW(dev))
  95                 return;
  96
  97         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
  98
  99         if (HAS_PCH_SPLIT(dev))
 100                 ironlake_enable_display_irq(dev_priv, DE_GSE);
 101         else {
 102                 i915_enable_pipestat(dev_priv, 1,
 103                                      PIPE_LEGACY_BLC_EVENT_ENABLE);
 104                 if (INTEL_INFO(dev)->gen >= 4)
 105                         i915_enable_pipestat(dev_priv, 0,
 106                                              PIPE_LEGACY_BLC_EVENT_ENABLE);
 107         }
 108
 109         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
 110 }
 111
 112 /**
 113  * i915_pipe_enabled - check if a pipe is enabled
 114  * @dev: DRM device
 115  * @pipe: pipe to check
 116  *
 117  * Reading certain registers when the pipe is disabled can hang the chip.
 118  * Use this routine to make sure the PLL is running and the pipe is active
 119  * before reading such registers if unsure.
 120  */
 121 static int
 122 i915_pipe_enabled(struct drm_device *dev, int pipe)
 123 {
 124         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 125         return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
 126 }
 127
 128 /* Called from drm generic code, passed a 'crtc', which
 129  * we use as a pipe index
 130  */
 131 static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
 132 {
 133         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 134         unsigned long high_frame;
 135         unsigned long low_frame;
 136         u32 high1, high2, low;
 137
 138         if (!i915_pipe_enabled(dev, pipe)) {
 139                 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
 140                                 "pipe %c\n", pipe_name(pipe));
 141                 return 0;
 142         }
 143
 144         high_frame = PIPEFRAME(pipe);
 145         low_frame = PIPEFRAMEPIXEL(pipe);
 146
 147         /*
 148          * High & low register fields aren't synchronized, so make sure
 149          * we get a low value that's stable across two reads of the high
 150          * register.
 151          */
 152         do {
 153                 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
 154                 low   = I915_READ(low_frame)  & PIPE_FRAME_LOW_MASK;
 155                 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
 156         } while (high1 != high2);
 157
 158         high1 >>= PIPE_FRAME_HIGH_SHIFT;
 159         low >>= PIPE_FRAME_LOW_SHIFT;
 160         return (high1 << 8) | low;
 161 }
 162
 163 static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
 164 {
 165         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 166         int reg = PIPE_FRMCOUNT_GM45(pipe);
 167
 168         if (!i915_pipe_enabled(dev, pipe)) {
 169                 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
 170                                  "pipe %c\n", pipe_name(pipe));
 171                 return 0;
 172         }
 173
 174         return I915_READ(reg);
 175 }
 176
 177 static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
 178                              int *vpos, int *hpos)
 179 {
 180         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 181         u32 vbl = 0, position = 0;
 182         int vbl_start, vbl_end, htotal, vtotal;
 183         bool in_vbl = true;
 184         int ret = 0;
 185
 186         if (!i915_pipe_enabled(dev, pipe)) {
 187                 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
 188                                  "pipe %c\n", pipe_name(pipe));
 189                 return 0;
 190         }
 191
 192         /* Get vtotal. */
 193         vtotal = 1 + ((I915_READ(VTOTAL(pipe)) >> 16) & 0x1fff);
 194
 195         if (INTEL_INFO(dev)->gen >= 4) {
 196                 /* No obvious pixelcount register. Only query vertical
 197                  * scanout position from Display scan line register.
 198                  */
 199                 position = I915_READ(PIPEDSL(pipe));
 200
 201                 /* Decode into vertical scanout position. Don't have
 202                  * horizontal scanout position.
 203                  */
 204                 *vpos = position & 0x1fff;
 205                 *hpos = 0;
 206         } else {
 207                 /* Have access to pixelcount since start of frame.
 208                  * We can split this into vertical and horizontal
 209                  * scanout position.
 210                  */
 211                 position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
 212
 213                 htotal = 1 + ((I915_READ(HTOTAL(pipe)) >> 16) & 0x1fff);
 214                 *vpos = position / htotal;
 215                 *hpos = position - (*vpos * htotal);
 216         }
 217
 218         /* Query vblank area. */
 219         vbl = I915_READ(VBLANK(pipe));
 220
 221         /* Test position against vblank region. */
 222         vbl_start = vbl & 0x1fff;
 223         vbl_end = (vbl >> 16) & 0x1fff;
 224
 225         if ((*vpos < vbl_start) || (*vpos > vbl_end))
 226                 in_vbl = false;
 227
 228         /* Inside "upper part" of vblank area? Apply corrective offset: */
 229         if (in_vbl && (*vpos >= vbl_start))
 230                 *vpos = *vpos - vtotal;
 231
 232         /* Readouts valid? */
 233         if (vbl > 0)
 234                 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
 235
 236         /* In vblank? */
 237         if (in_vbl)
 238                 ret |= DRM_SCANOUTPOS_INVBL;
 239
 240         return ret;
 241 }
 242
 243 static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
 244                               int *max_error,
 245                               struct timeval *vblank_time,
 246                               unsigned flags)
 247 {
 248         struct drm_i915_private *dev_priv = dev->dev_private;
 249         struct drm_crtc *crtc;
 250
 251         if (pipe < 0 || pipe >= dev_priv->num_pipe) {
 252                 DRM_ERROR("Invalid crtc %d\n", pipe);
 253                 return -EINVAL;
 254         }
 255
 256         /* Get drm_crtc to timestamp: */
 257         crtc = intel_get_crtc_for_pipe(dev, pipe);
 258         if (crtc == NULL) {
 259                 DRM_ERROR("Invalid crtc %d\n", pipe);
 260                 return -EINVAL;
 261         }
 262
 263         if (!crtc->enabled) {
 264                 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
 265                 return -EBUSY;
 266         }
 267
 268         /* Helper routine in DRM core does all the work: */
 269         return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
 270                                                      vblank_time, flags,
 271                                                      crtc);
 272 }
 273
 274 /*
 275  * Handle hotplug events outside the interrupt handler proper.
 276  */
 277 static void i915_hotplug_work_func(struct work_struct *work)
 278 {
 279         drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
 280                                                     hotplug_work);
 281         struct drm_device *dev = dev_priv->dev;
 282         struct drm_mode_config *mode_config = &dev->mode_config;
 283         struct intel_encoder *encoder;
 284
 285         mutex_lock(&mode_config->mutex);
 286         DRM_DEBUG_KMS("running encoder hotplug functions\n");
 287
 288         list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
 289                 if (encoder->hot_plug)
 290                         encoder->hot_plug(encoder);
 291
 292         mutex_unlock(&mode_config->mutex);
 293
 294         /* Just fire off a uevent and let userspace tell us what to do */
 295         drm_helper_hpd_irq_event(dev);
 296 }
 297
 298 /* defined intel_pm.c */
 299 extern spinlock_t mchdev_lock;
 300
 301 static void ironlake_handle_rps_change(struct drm_device *dev)
 302 {
 303         drm_i915_private_t *dev_priv = dev->dev_private;
 304         u32 busy_up, busy_down, max_avg, min_avg;
 305         u8 new_delay;
 306         unsigned long flags;
 307
 308         spin_lock_irqsave(&mchdev_lock, flags);
 309
 310         I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
 311
 312         new_delay = dev_priv->ips.cur_delay;
 313
 314         I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
 315         busy_up = I915_READ(RCPREVBSYTUPAVG);
 316         busy_down = I915_READ(RCPREVBSYTDNAVG);
 317         max_avg = I915_READ(RCBMAXAVG);
 318         min_avg = I915_READ(RCBMINAVG);
 319
 320         /* Handle RCS change request from hw */
 321         if (busy_up > max_avg) {
 322                 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
 323                         new_delay = dev_priv->ips.cur_delay - 1;
 324                 if (new_delay < dev_priv->ips.max_delay)
 325                         new_delay = dev_priv->ips.max_delay;
 326         } else if (busy_down < min_avg) {
 327                 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
 328                         new_delay = dev_priv->ips.cur_delay + 1;
 329                 if (new_delay > dev_priv->ips.min_delay)
 330                         new_delay = dev_priv->ips.min_delay;
 331         }
 332
 333         if (ironlake_set_drps(dev, new_delay))
 334                 dev_priv->ips.cur_delay = new_delay;
 335
 336         spin_unlock_irqrestore(&mchdev_lock, flags);
 337
 338         return;
 339 }
 340
 341 static void notify_ring(struct drm_device *dev,
 342                         struct intel_ring_buffer *ring)
 343 {
 344         struct drm_i915_private *dev_priv = dev->dev_private;
 345
 346         if (ring->obj == NULL)
 347                 return;
 348
 349         trace_i915_gem_request_complete(ring, ring->get_seqno(ring, false));
 350
 351         wake_up_all(&ring->irq_queue);
 352         if (i915_enable_hangcheck) {
 353                 dev_priv->hangcheck_count = 0;
 354                 mod_timer(&dev_priv->hangcheck_timer,
 355                           round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
 356         }
 357 }
 358
 359 static void gen6_pm_rps_work(struct work_struct *work)
 360 {
 361         drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
 362                                                     rps.work);
 363         u32 pm_iir, pm_imr;
 364         u8 new_delay;
 365
 366         spin_lock_irq(&dev_priv->rps.lock);
 367         pm_iir = dev_priv->rps.pm_iir;
 368         dev_priv->rps.pm_iir = 0;
 369         pm_imr = I915_READ(GEN6_PMIMR);
 370         I915_WRITE(GEN6_PMIMR, 0);
 371         spin_unlock_irq(&dev_priv->rps.lock);
 372
 373         if ((pm_iir & GEN6_PM_DEFERRED_EVENTS) == 0)
 374                 return;
 375
 376         mutex_lock(&dev_priv->dev->struct_mutex);
 377
 378         if (pm_iir & GEN6_PM_RP_UP_THRESHOLD)
 379                 new_delay = dev_priv->rps.cur_delay + 1;
 380         else
 381                 new_delay = dev_priv->rps.cur_delay - 1;
 382
 383         /* sysfs frequency interfaces may have snuck in while servicing the
 384          * interrupt
 385          */
 386         if (!(new_delay > dev_priv->rps.max_delay ||
 387               new_delay < dev_priv->rps.min_delay)) {
 388                 gen6_set_rps(dev_priv->dev, new_delay);
 389         }
 390
 391         mutex_unlock(&dev_priv->dev->struct_mutex);
 392 }
 393
 394
 395 /**
 396  * ivybridge_parity_work - Workqueue called when a parity error interrupt
 397  * occurred.
 398  * @work: workqueue struct
 399  *
 400  * Doesn't actually do anything except notify userspace. As a consequence of
 401  * this event, userspace should try to remap the bad rows since statistically
 402  * it is likely the same row is more likely to go bad again.
 403  */
 404 static void ivybridge_parity_work(struct work_struct *work)
 405 {
 406         drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
 407                                                     parity_error_work);
 408         u32 error_status, row, bank, subbank;
 409         char *parity_event[5];
 410         uint32_t misccpctl;
 411         unsigned long flags;
 412
 413         /* We must turn off DOP level clock gating to access the L3 registers.
 414          * In order to prevent a get/put style interface, acquire struct mutex
 415          * any time we access those registers.
 416          */
 417         mutex_lock(&dev_priv->dev->struct_mutex);
 418
 419         misccpctl = I915_READ(GEN7_MISCCPCTL);
 420         I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
 421         POSTING_READ(GEN7_MISCCPCTL);
 422
 423         error_status = I915_READ(GEN7_L3CDERRST1);
 424         row = GEN7_PARITY_ERROR_ROW(error_status);
 425         bank = GEN7_PARITY_ERROR_BANK(error_status);
 426         subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
 427
 428         I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID |
 429                                     GEN7_L3CDERRST1_ENABLE);
 430         POSTING_READ(GEN7_L3CDERRST1);
 431
 432         I915_WRITE(GEN7_MISCCPCTL, misccpctl);
 433
 434         spin_lock_irqsave(&dev_priv->irq_lock, flags);
 435         dev_priv->gt_irq_mask &= ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
 436         I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
 437         spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
 438
 439         mutex_unlock(&dev_priv->dev->struct_mutex);
 440
 441         parity_event[0] = "L3_PARITY_ERROR=1";
 442         parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
 443         parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
 444         parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
 445         parity_event[4] = NULL;
 446
 447         kobject_uevent_env(&dev_priv->dev->primary->kdev.kobj,
 448                            KOBJ_CHANGE, parity_event);
 449
 450         DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
 451                   row, bank, subbank);
 452
 453         kfree(parity_event[3]);
 454         kfree(parity_event[2]);
 455         kfree(parity_event[1]);
 456 }
 457
 458 static void ivybridge_handle_parity_error(struct drm_device *dev)
 459 {
 460         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 461         unsigned long flags;
 462
 463         if (!HAS_L3_GPU_CACHE(dev))
 464                 return;
 465
 466         spin_lock_irqsave(&dev_priv->irq_lock, flags);
 467         dev_priv->gt_irq_mask |= GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
 468         I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
 469         spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
 470
 471         queue_work(dev_priv->wq, &dev_priv->parity_error_work);
 472 }
 473
 474 static void snb_gt_irq_handler(struct drm_device *dev,
 475                                struct drm_i915_private *dev_priv,
 476                                u32 gt_iir)
 477 {
 478
 479         if (gt_iir & (GEN6_RENDER_USER_INTERRUPT |
 480                       GEN6_RENDER_PIPE_CONTROL_NOTIFY_INTERRUPT))
 481                 notify_ring(dev, &dev_priv->ring[RCS]);
 482         if (gt_iir & GEN6_BSD_USER_INTERRUPT)
 483                 notify_ring(dev, &dev_priv->ring[VCS]);
 484         if (gt_iir & GEN6_BLITTER_USER_INTERRUPT)
 485                 notify_ring(dev, &dev_priv->ring[BCS]);
 486
 487         if (gt_iir & (GT_GEN6_BLT_CS_ERROR_INTERRUPT |
 488                       GT_GEN6_BSD_CS_ERROR_INTERRUPT |
 489                       GT_RENDER_CS_ERROR_INTERRUPT)) {
 490                 DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
 491                 i915_handle_error(dev, false);
 492         }
 493
 494         if (gt_iir & GT_GEN7_L3_PARITY_ERROR_INTERRUPT)
 495                 ivybridge_handle_parity_error(dev);
 496 }
 497
 498 static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
 499                                 u32 pm_iir)
 500 {
 501         unsigned long flags;
 502
 503         /*
 504          * IIR bits should never already be set because IMR should
 505          * prevent an interrupt from being shown in IIR. The warning
 506          * displays a case where we've unsafely cleared
 507          * dev_priv->rps.pm_iir. Although missing an interrupt of the same
 508          * type is not a problem, it displays a problem in the logic.
 509          *
 510          * The mask bit in IMR is cleared by dev_priv->rps.work.
 511          */
 512
 513         spin_lock_irqsave(&dev_priv->rps.lock, flags);
 514         dev_priv->rps.pm_iir |= pm_iir;
 515         I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
 516         POSTING_READ(GEN6_PMIMR);
 517         spin_unlock_irqrestore(&dev_priv->rps.lock, flags);
 518
 519         queue_work(dev_priv->wq, &dev_priv->rps.work);
 520 }
 521
 522 static irqreturn_t valleyview_irq_handler(int irq, void *arg)
 523 {
 524         struct drm_device *dev = (struct drm_device *) arg;
 525         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 526         u32 iir, gt_iir, pm_iir;
 527         irqreturn_t ret = IRQ_NONE;
 528         unsigned long irqflags;
 529         int pipe;
 530         u32 pipe_stats[I915_MAX_PIPES];
 531         bool blc_event;
 532
 533         atomic_inc(&dev_priv->irq_received);
 534
 535         while (true) {
 536                 iir = I915_READ(VLV_IIR);
 537                 gt_iir = I915_READ(GTIIR);
 538                 pm_iir = I915_READ(GEN6_PMIIR);
 539
 540                 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
 541                         goto out;
 542
 543                 ret = IRQ_HANDLED;
 544
 545                 snb_gt_irq_handler(dev, dev_priv, gt_iir);
 546
 547                 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
 548                 for_each_pipe(pipe) {
 549                         int reg = PIPESTAT(pipe);
 550                         pipe_stats[pipe] = I915_READ(reg);
 551
 552                         /*
 553                          * Clear the PIPE*STAT regs before the IIR
 554                          */
 555                         if (pipe_stats[pipe] & 0x8000ffff) {
 556                                 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
 557                                         DRM_DEBUG_DRIVER("pipe %c underrun\n",
 558                                                          pipe_name(pipe));
 559                                 I915_WRITE(reg, pipe_stats[pipe]);
 560                         }
 561                 }
 562                 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
 563
 564                 for_each_pipe(pipe) {
 565                         if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
 566                                 drm_handle_vblank(dev, pipe);
 567
 568                         if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
 569                                 intel_prepare_page_flip(dev, pipe);
 570                                 intel_finish_page_flip(dev, pipe);
 571                         }
 572                 }
 573
 574                 /* Consume port.  Then clear IIR or we'll miss events */
 575                 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
 576                         u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
 577
 578                         DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
 579                                          hotplug_status);
 580                         if (hotplug_status & dev_priv->hotplug_supported_mask)
 581                                 queue_work(dev_priv->wq,
 582                                            &dev_priv->hotplug_work);
 583
 584                         I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
 585                         I915_READ(PORT_HOTPLUG_STAT);
 586                 }
 587
 588                 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
 589                         blc_event = true;
 590
 591                 if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
 592                         gen6_queue_rps_work(dev_priv, pm_iir);
 593
 594                 I915_WRITE(GTIIR, gt_iir);
 595                 I915_WRITE(GEN6_PMIIR, pm_iir);
 596                 I915_WRITE(VLV_IIR, iir);
 597         }
 598
 599 out:
 600         return ret;
 601 }
 602
 603 static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
 604 {
 605         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 606         int pipe;
 607
 608         if (pch_iir & SDE_HOTPLUG_MASK)
 609                 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
 610
 611         if (pch_iir & SDE_AUDIO_POWER_MASK)
 612                 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
 613                                  (pch_iir & SDE_AUDIO_POWER_MASK) >>
 614                                  SDE_AUDIO_POWER_SHIFT);
 615
 616         if (pch_iir & SDE_GMBUS)
 617                 DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
 618
 619         if (pch_iir & SDE_AUDIO_HDCP_MASK)
 620                 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
 621
 622         if (pch_iir & SDE_AUDIO_TRANS_MASK)
 623                 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
 624
 625         if (pch_iir & SDE_POISON)
 626                 DRM_ERROR("PCH poison interrupt\n");
 627
 628         if (pch_iir & SDE_FDI_MASK)
 629                 for_each_pipe(pipe)
 630                         DRM_DEBUG_DRIVER("  pipe %c FDI IIR: 0x%08x\n",
 631                                          pipe_name(pipe),
 632                                          I915_READ(FDI_RX_IIR(pipe)));
 633
 634         if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
 635                 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
 636
 637         if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
 638                 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
 639
 640         if (pch_iir & SDE_TRANSB_FIFO_UNDER)
 641                 DRM_DEBUG_DRIVER("PCH transcoder B underrun interrupt\n");
 642         if (pch_iir & SDE_TRANSA_FIFO_UNDER)
 643                 DRM_DEBUG_DRIVER("PCH transcoder A underrun interrupt\n");
 644 }
 645
 646 static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
 647 {
 648         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 649         int pipe;
 650
 651         if (pch_iir & SDE_HOTPLUG_MASK_CPT)
 652                 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
 653
 654         if (pch_iir & SDE_AUDIO_POWER_MASK_CPT)
 655                 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
 656                                  (pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
 657                                  SDE_AUDIO_POWER_SHIFT_CPT);
 658
 659         if (pch_iir & SDE_AUX_MASK_CPT)
 660                 DRM_DEBUG_DRIVER("AUX channel interrupt\n");
 661
 662         if (pch_iir & SDE_GMBUS_CPT)
 663                 DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
 664
 665         if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
 666                 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
 667
 668         if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
 669                 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
 670
 671         if (pch_iir & SDE_FDI_MASK_CPT)
 672                 for_each_pipe(pipe)
 673                         DRM_DEBUG_DRIVER("  pipe %c FDI IIR: 0x%08x\n",
 674                                          pipe_name(pipe),
 675                                          I915_READ(FDI_RX_IIR(pipe)));
 676 }
 677
 678 static irqreturn_t ivybridge_irq_handler(int irq, void *arg)
 679 {
 680         struct drm_device *dev = (struct drm_device *) arg;
 681         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 682         u32 de_iir, gt_iir, de_ier, pm_iir;
 683         irqreturn_t ret = IRQ_NONE;
 684         int i;
 685
 686         atomic_inc(&dev_priv->irq_received);
 687
 688         /* disable master interrupt before clearing iir  */
 689         de_ier = I915_READ(DEIER);
 690         I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
 691
 692         gt_iir = I915_READ(GTIIR);
 693         if (gt_iir) {
 694                 snb_gt_irq_handler(dev, dev_priv, gt_iir);
 695                 I915_WRITE(GTIIR, gt_iir);
 696                 ret = IRQ_HANDLED;
 697         }
 698
 699         de_iir = I915_READ(DEIIR);
 700         if (de_iir) {
 701                 if (de_iir & DE_GSE_IVB)
 702                         intel_opregion_gse_intr(dev);
 703
 704                 for (i = 0; i < 3; i++) {
 705                         if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
 706                                 drm_handle_vblank(dev, i);
 707                         if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
 708                                 intel_prepare_page_flip(dev, i);
 709                                 intel_finish_page_flip_plane(dev, i);
 710                         }
 711                 }
 712
 713                 /* check event from PCH */
 714                 if (de_iir & DE_PCH_EVENT_IVB) {
 715                         u32 pch_iir = I915_READ(SDEIIR);
 716
 717                         cpt_irq_handler(dev, pch_iir);
 718
 719                         /* clear PCH hotplug event before clear CPU irq */
 720                         I915_WRITE(SDEIIR, pch_iir);
 721                 }
 722
 723                 I915_WRITE(DEIIR, de_iir);
 724                 ret = IRQ_HANDLED;
 725         }
 726
 727         pm_iir = I915_READ(GEN6_PMIIR);
 728         if (pm_iir) {
 729                 if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
 730                         gen6_queue_rps_work(dev_priv, pm_iir);
 731                 I915_WRITE(GEN6_PMIIR, pm_iir);
 732                 ret = IRQ_HANDLED;
 733         }
 734
 735         I915_WRITE(DEIER, de_ier);
 736         POSTING_READ(DEIER);
 737
 738         return ret;
 739 }
 740
 741 static void ilk_gt_irq_handler(struct drm_device *dev,
 742                                struct drm_i915_private *dev_priv,
 743                                u32 gt_iir)
 744 {
 745         if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY))
 746                 notify_ring(dev, &dev_priv->ring[RCS]);
 747         if (gt_iir & GT_BSD_USER_INTERRUPT)
 748                 notify_ring(dev, &dev_priv->ring[VCS]);
 749 }
 750
 751 static irqreturn_t ironlake_irq_handler(int irq, void *arg)
 752 {
 753         struct drm_device *dev = (struct drm_device *) arg;
 754         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 755         int ret = IRQ_NONE;
 756         u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir;
 757
 758         atomic_inc(&dev_priv->irq_received);
 759
 760         /* disable master interrupt before clearing iir  */
 761         de_ier = I915_READ(DEIER);
 762         I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
 763         POSTING_READ(DEIER);
 764
 765         de_iir = I915_READ(DEIIR);
 766         gt_iir = I915_READ(GTIIR);
 767         pch_iir = I915_READ(SDEIIR);
 768         pm_iir = I915_READ(GEN6_PMIIR);
 769
 770         if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 &&
 771             (!IS_GEN6(dev) || pm_iir == 0))
 772                 goto done;
 773
 774         ret = IRQ_HANDLED;
 775
 776         if (IS_GEN5(dev))
 777                 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
 778         else
 779                 snb_gt_irq_handler(dev, dev_priv, gt_iir);
 780
 781         if (de_iir & DE_GSE)
 782                 intel_opregion_gse_intr(dev);
 783
 784         if (de_iir & DE_PIPEA_VBLANK)
 785                 drm_handle_vblank(dev, 0);
 786
 787         if (de_iir & DE_PIPEB_VBLANK)
 788                 drm_handle_vblank(dev, 1);
 789
 790         if (de_iir & DE_PLANEA_FLIP_DONE) {
 791                 intel_prepare_page_flip(dev, 0);
 792                 intel_finish_page_flip_plane(dev, 0);
 793         }
 794
 795         if (de_iir & DE_PLANEB_FLIP_DONE) {
 796                 intel_prepare_page_flip(dev, 1);
 797                 intel_finish_page_flip_plane(dev, 1);
 798         }
 799
 800         /* check event from PCH */
 801         if (de_iir & DE_PCH_EVENT) {
 802                 if (HAS_PCH_CPT(dev))
 803                         cpt_irq_handler(dev, pch_iir);
 804                 else
 805                         ibx_irq_handler(dev, pch_iir);
 806         }
 807
 808         if (IS_GEN5(dev) &&  de_iir & DE_PCU_EVENT)
 809                 ironlake_handle_rps_change(dev);
 810
 811         if (IS_GEN6(dev) && pm_iir & GEN6_PM_DEFERRED_EVENTS)
 812                 gen6_queue_rps_work(dev_priv, pm_iir);
 813
 814         /* should clear PCH hotplug event before clear CPU irq */
 815         I915_WRITE(SDEIIR, pch_iir);
 816         I915_WRITE(GTIIR, gt_iir);
 817         I915_WRITE(DEIIR, de_iir);
 818         I915_WRITE(GEN6_PMIIR, pm_iir);
 819
 820 done:
 821         I915_WRITE(DEIER, de_ier);
 822         POSTING_READ(DEIER);
 823
 824         return ret;
 825 }
 826
 827 /**
 828  * i915_error_work_func - do process context error handling work
 829  * @work: work struct
 830  *
 831  * Fire an error uevent so userspace can see that a hang or error
 832  * was detected.
 833  */
 834 static void i915_error_work_func(struct work_struct *work)
 835 {
 836         drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
 837                                                     error_work);
 838         struct drm_device *dev = dev_priv->dev;
 839         char *error_event[] = { "ERROR=1", NULL };
 840         char *reset_event[] = { "RESET=1", NULL };
 841         char *reset_done_event[] = { "ERROR=0", NULL };
 842
 843         kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
 844
 845         if (atomic_read(&dev_priv->mm.wedged)) {
 846                 DRM_DEBUG_DRIVER("resetting chip\n");
 847                 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event);
 848                 if (!i915_reset(dev)) {
 849                         atomic_set(&dev_priv->mm.wedged, 0);
 850                         kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event);
 851                 }
 852                 complete_all(&dev_priv->error_completion);
 853         }
 854 }
 855
 856 /* NB: please notice the memset */
 857 static void i915_get_extra_instdone(struct drm_device *dev,
 858                                     uint32_t *instdone)
 859 {
 860         struct drm_i915_private *dev_priv = dev->dev_private;
 861         memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
 862
 863         switch(INTEL_INFO(dev)->gen) {
 864         case 2:
 865         case 3:
 866                 instdone[0] = I915_READ(INSTDONE);
 867                 break;
 868         case 4:
 869         case 5:
 870         case 6:
 871                 instdone[0] = I915_READ(INSTDONE_I965);
 872                 instdone[1] = I915_READ(INSTDONE1);
 873                 break;
 874         default:
 875                 WARN_ONCE(1, "Unsupported platform\n");
 876         case 7:
 877                 instdone[0] = I915_READ(GEN7_INSTDONE_1);
 878                 instdone[1] = I915_READ(GEN7_SC_INSTDONE);
 879                 instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
 880                 instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
 881                 break;
 882         }
 883 }
 884
 885 #ifdef CONFIG_DEBUG_FS
 886 static struct drm_i915_error_object *
 887 i915_error_object_create(struct drm_i915_private *dev_priv,
 888                          struct drm_i915_gem_object *src)
 889 {
 890         struct drm_i915_error_object *dst;
 891         int i, count;
 892         u32 reloc_offset;
 893
 894         if (src == NULL || src->pages == NULL)
 895                 return NULL;
 896
 897         count = src->base.size / PAGE_SIZE;
 898
 899         dst = kmalloc(sizeof(*dst) + count * sizeof(u32 *), GFP_ATOMIC);
 900         if (dst == NULL)
 901                 return NULL;
 902
 903         reloc_offset = src->gtt_offset;
 904         for (i = 0; i < count; i++) {
 905                 unsigned long flags;
 906                 void *d;
 907
 908                 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
 909                 if (d == NULL)
 910                         goto unwind;
 911
 912                 local_irq_save(flags);
 913                 if (reloc_offset < dev_priv->mm.gtt_mappable_end &&
 914                     src->has_global_gtt_mapping) {
 915                         void __iomem *s;
 916
 917                         /* Simply ignore tiling or any overlapping fence.
 918                          * It's part of the error state, and this hopefully
 919                          * captures what the GPU read.
 920                          */
 921
 922                         s = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
 923                                                      reloc_offset);
 924                         memcpy_fromio(d, s, PAGE_SIZE);
 925                         io_mapping_unmap_atomic(s);
 926                 } else {
 927                         struct page *page;
 928                         void *s;
 929
 930                         page = i915_gem_object_get_page(src, i);
 931
 932                         drm_clflush_pages(&page, 1);
 933
 934                         s = kmap_atomic(page);
 935                         memcpy(d, s, PAGE_SIZE);
 936                         kunmap_atomic(s);
 937
 938                         drm_clflush_pages(&page, 1);
 939                 }
 940                 local_irq_restore(flags);
 941
 942                 dst->pages[i] = d;
 943
 944                 reloc_offset += PAGE_SIZE;
 945         }
 946         dst->page_count = count;
 947         dst->gtt_offset = src->gtt_offset;
 948
 949         return dst;
 950
 951 unwind:
 952         while (i--)
 953                 kfree(dst->pages[i]);
 954         kfree(dst);
 955         return NULL;
 956 }
 957
 958 static void
 959 i915_error_object_free(struct drm_i915_error_object *obj)
 960 {
 961         int page;
 962
 963         if (obj == NULL)
 964                 return;
 965
 966         for (page = 0; page < obj->page_count; page++)
 967                 kfree(obj->pages[page]);
 968
 969         kfree(obj);
 970 }
 971
 972 void
 973 i915_error_state_free(struct kref *error_ref)
 974 {
 975         struct drm_i915_error_state *error = container_of(error_ref,
 976                                                           typeof(*error), ref);
 977         int i;
 978
 979         for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
 980                 i915_error_object_free(error->ring[i].batchbuffer);
 981                 i915_error_object_free(error->ring[i].ringbuffer);
 982                 kfree(error->ring[i].requests);
 983         }
 984
 985         kfree(error->active_bo);
 986         kfree(error->overlay);
 987         kfree(error);
 988 }
 989 static void capture_bo(struct drm_i915_error_buffer *err,
 990                        struct drm_i915_gem_object *obj)
 991 {
 992         err->size = obj->base.size;
 993         err->name = obj->base.name;
 994         err->rseqno = obj->last_read_seqno;
 995         err->wseqno = obj->last_write_seqno;
 996         err->gtt_offset = obj->gtt_offset;
 997         err->read_domains = obj->base.read_domains;
 998         err->write_domain = obj->base.write_domain;
 999         err->fence_reg = obj->fence_reg;
1000         err->pinned = 0;
1001         if (obj->pin_count > 0)
1002                 err->pinned = 1;
1003         if (obj->user_pin_count > 0)
1004                 err->pinned = -1;
1005         err->tiling = obj->tiling_mode;
1006         err->dirty = obj->dirty;
1007         err->purgeable = obj->madv != I915_MADV_WILLNEED;
1008         err->ring = obj->ring ? obj->ring->id : -1;
1009         err->cache_level = obj->cache_level;
1010 }
1011
1012 static u32 capture_active_bo(struct drm_i915_error_buffer *err,
1013                              int count, struct list_head *head)
1014 {
1015         struct drm_i915_gem_object *obj;
1016         int i = 0;
1017
1018         list_for_each_entry(obj, head, mm_list) {
1019                 capture_bo(err++, obj);
1020                 if (++i == count)
1021                         break;
1022         }
1023
1024         return i;
1025 }
1026
1027 static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
1028                              int count, struct list_head *head)
1029 {
1030         struct drm_i915_gem_object *obj;
1031         int i = 0;
1032
1033         list_for_each_entry(obj, head, gtt_list) {
1034                 if (obj->pin_count == 0)
1035                         continue;
1036
1037                 capture_bo(err++, obj);
1038                 if (++i == count)
1039                         break;
1040         }
1041
1042         return i;
1043 }
1044
1045 static void i915_gem_record_fences(struct drm_device *dev,
1046                                    struct drm_i915_error_state *error)
1047 {
1048         struct drm_i915_private *dev_priv = dev->dev_private;
1049         int i;
1050
1051         /* Fences */
1052         switch (INTEL_INFO(dev)->gen) {
1053         case 7:
1054         case 6:
1055                 for (i = 0; i < 16; i++)
1056                         error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
1057                 break;
1058         case 5:
1059         case 4:
1060                 for (i = 0; i < 16; i++)
1061                         error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
1062                 break;
1063         case 3:
1064                 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
1065                         for (i = 0; i < 8; i++)
1066                                 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
1067         case 2:
1068                 for (i = 0; i < 8; i++)
1069                         error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
1070                 break;
1071
1072         }
1073 }
1074
1075 static struct drm_i915_error_object *
1076 i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
1077                              struct intel_ring_buffer *ring)
1078 {
1079         struct drm_i915_gem_object *obj;
1080         u32 seqno;
1081
1082         if (!ring->get_seqno)
1083                 return NULL;
1084
1085         seqno = ring->get_seqno(ring, false);
1086         list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
1087                 if (obj->ring != ring)
1088                         continue;
1089
1090                 if (i915_seqno_passed(seqno, obj->last_read_seqno))
1091                         continue;
1092
1093                 if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
1094                         continue;
1095
1096                 /* We need to copy these to an anonymous buffer as the simplest
1097                  * method to avoid being overwritten by userspace.
1098                  */
1099                 return i915_error_object_create(dev_priv, obj);
1100         }
1101
1102         return NULL;
1103 }
1104
1105 static void i915_record_ring_state(struct drm_device *dev,
1106                                    struct drm_i915_error_state *error,
1107                                    struct intel_ring_buffer *ring)
1108 {
1109         struct drm_i915_private *dev_priv = dev->dev_private;
1110
1111         if (INTEL_INFO(dev)->gen >= 6) {
1112                 error->rc_psmi[ring->id] = I915_READ(ring->mmio_base + 0x50);
1113                 error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
1114                 error->semaphore_mboxes[ring->id][0]
1115                         = I915_READ(RING_SYNC_0(ring->mmio_base));
1116                 error->semaphore_mboxes[ring->id][1]
1117                         = I915_READ(RING_SYNC_1(ring->mmio_base));
1118         }
1119
1120         if (INTEL_INFO(dev)->gen >= 4) {
1121                 error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
1122                 error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
1123                 error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
1124                 error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
1125                 error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
1126                 if (ring->id == RCS)
1127                         error->bbaddr = I915_READ64(BB_ADDR);
1128         } else {
1129                 error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX);
1130                 error->ipeir[ring->id] = I915_READ(IPEIR);
1131                 error->ipehr[ring->id] = I915_READ(IPEHR);
1132                 error->instdone[ring->id] = I915_READ(INSTDONE);
1133         }
1134
1135         error->waiting[ring->id] = waitqueue_active(&ring->irq_queue);
1136         error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
1137         error->seqno[ring->id] = ring->get_seqno(ring, false);
1138         error->acthd[ring->id] = intel_ring_get_active_head(ring);
1139         error->head[ring->id] = I915_READ_HEAD(ring);
1140         error->tail[ring->id] = I915_READ_TAIL(ring);
1141
1142         error->cpu_ring_head[ring->id] = ring->head;
1143         error->cpu_ring_tail[ring->id] = ring->tail;
1144 }
1145
1146 static void i915_gem_record_rings(struct drm_device *dev,
1147                                   struct drm_i915_error_state *error)
1148 {
1149         struct drm_i915_private *dev_priv = dev->dev_private;
1150         struct intel_ring_buffer *ring;
1151         struct drm_i915_gem_request *request;
1152         int i, count;
1153
1154         for_each_ring(ring, dev_priv, i) {
1155                 i915_record_ring_state(dev, error, ring);
1156
1157                 error->ring[i].batchbuffer =
1158                         i915_error_first_batchbuffer(dev_priv, ring);
1159
1160                 error->ring[i].ringbuffer =
1161                         i915_error_object_create(dev_priv, ring->obj);
1162
1163                 count = 0;
1164                 list_for_each_entry(request, &ring->request_list, list)
1165                         count++;
1166
1167                 error->ring[i].num_requests = count;
1168                 error->ring[i].requests =
1169                         kmalloc(count*sizeof(struct drm_i915_error_request),
1170                                 GFP_ATOMIC);
1171                 if (error->ring[i].requests == NULL) {
1172                         error->ring[i].num_requests = 0;
1173                         continue;
1174                 }
1175
1176                 count = 0;
1177                 list_for_each_entry(request, &ring->request_list, list) {
1178                         struct drm_i915_error_request *erq;
1179
1180                         erq = &error->ring[i].requests[count++];
1181                         erq->seqno = request->seqno;
1182                         erq->jiffies = request->emitted_jiffies;
1183                         erq->tail = request->tail;
1184                 }
1185         }
1186 }
1187
1188 /**
1189  * i915_capture_error_state - capture an error record for later analysis
1190  * @dev: drm device
1191  *
1192  * Should be called when an error is detected (either a hang or an error
1193  * interrupt) to capture error state from the time of the error.  Fills
1194  * out a structure which becomes available in debugfs for user level tools
1195  * to pick up.
1196  */
1197 static void i915_capture_error_state(struct drm_device *dev)
1198 {
1199         struct drm_i915_private *dev_priv = dev->dev_private;
1200         struct drm_i915_gem_object *obj;
1201         struct drm_i915_error_state *error;
1202         unsigned long flags;
1203         int i, pipe;
1204
1205         spin_lock_irqsave(&dev_priv->error_lock, flags);
1206         error = dev_priv->first_error;
1207         spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1208         if (error)
1209                 return;
1210
1211         /* Account for pipe specific data like PIPE*STAT */
1212         error = kzalloc(sizeof(*error), GFP_ATOMIC);
1213         if (!error) {
1214                 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
1215                 return;
1216         }
1217
1218         DRM_INFO("capturing error event; look for more information in /debug/dri/%d/i915_error_state\n",
1219                  dev->primary->index);
1220
1221         kref_init(&error->ref);
1222         error->eir = I915_READ(EIR);
1223         error->pgtbl_er = I915_READ(PGTBL_ER);
1224         error->ccid = I915_READ(CCID);
1225
1226         if (HAS_PCH_SPLIT(dev))
1227                 error->ier = I915_READ(DEIER) | I915_READ(GTIER);
1228         else if (IS_VALLEYVIEW(dev))
1229                 error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
1230         else if (IS_GEN2(dev))
1231                 error->ier = I915_READ16(IER);
1232         else
1233                 error->ier = I915_READ(IER);
1234
1235         for_each_pipe(pipe)
1236                 error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
1237
1238         if (INTEL_INFO(dev)->gen >= 6) {
1239                 error->error = I915_READ(ERROR_GEN6);
1240                 error->done_reg = I915_READ(DONE_REG);
1241         }
1242
1243         if (INTEL_INFO(dev)->gen == 7)
1244                 error->err_int = I915_READ(GEN7_ERR_INT);
1245
1246         i915_get_extra_instdone(dev, error->extra_instdone);
1247
1248         i915_gem_record_fences(dev, error);
1249         i915_gem_record_rings(dev, error);
1250
1251         /* Record buffers on the active and pinned lists. */
1252         error->active_bo = NULL;
1253         error->pinned_bo = NULL;
1254
1255         i = 0;
1256         list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
1257                 i++;
1258         error->active_bo_count = i;
1259         list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list)
1260                 if (obj->pin_count)
1261                         i++;
1262         error->pinned_bo_count = i - error->active_bo_count;
1263
1264         error->active_bo = NULL;
1265         error->pinned_bo = NULL;
1266         if (i) {
1267                 error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
1268                                            GFP_ATOMIC);
1269                 if (error->active_bo)
1270                         error->pinned_bo =
1271                                 error->active_bo + error->active_bo_count;
1272         }
1273
1274         if (error->active_bo)
1275                 error->active_bo_count =
1276                         capture_active_bo(error->active_bo,
1277                                           error->active_bo_count,
1278                                           &dev_priv->mm.active_list);
1279
1280         if (error->pinned_bo)
1281                 error->pinned_bo_count =
1282                         capture_pinned_bo(error->pinned_bo,
1283                                           error->pinned_bo_count,
1284                                           &dev_priv->mm.bound_list);
1285
1286         do_gettimeofday(&error->time);
1287
1288         error->overlay = intel_overlay_capture_error_state(dev);
1289         error->display = intel_display_capture_error_state(dev);
1290
1291         spin_lock_irqsave(&dev_priv->error_lock, flags);
1292         if (dev_priv->first_error == NULL) {
1293                 dev_priv->first_error = error;
1294                 error = NULL;
1295         }
1296         spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1297
1298         if (error)
1299                 i915_error_state_free(&error->ref);
1300 }
1301
1302 void i915_destroy_error_state(struct drm_device *dev)
1303 {
1304         struct drm_i915_private *dev_priv = dev->dev_private;
1305         struct drm_i915_error_state *error;
1306         unsigned long flags;
1307
1308         spin_lock_irqsave(&dev_priv->error_lock, flags);
1309         error = dev_priv->first_error;
1310         dev_priv->first_error = NULL;
1311         spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1312
1313         if (error)
1314                 kref_put(&error->ref, i915_error_state_free);
1315 }
1316 #else
1317 #define i915_capture_error_state(x)
1318 #endif
1319
1320 static void i915_report_and_clear_eir(struct drm_device *dev)
1321 {
1322         struct drm_i915_private *dev_priv = dev->dev_private;
1323         uint32_t instdone[I915_NUM_INSTDONE_REG];
1324         u32 eir = I915_READ(EIR);
1325         int pipe, i;
1326
1327         if (!eir)
1328                 return;
1329
1330         pr_err("render error detected, EIR: 0x%08x\n", eir);
1331
1332         i915_get_extra_instdone(dev, instdone);
1333
1334         if (IS_G4X(dev)) {
1335                 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
1336                         u32 ipeir = I915_READ(IPEIR_I965);
1337
1338                         pr_err("  IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
1339                         pr_err("  IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
1340                         for (i = 0; i < ARRAY_SIZE(instdone); i++)
1341                                 pr_err("  INSTDONE_%d: 0x%08x\n", i, instdone[i]);
1342                         pr_err("  INSTPS: 0x%08x\n", I915_READ(INSTPS));
1343                         pr_err("  ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
1344                         I915_WRITE(IPEIR_I965, ipeir);
1345                         POSTING_READ(IPEIR_I965);
1346                 }
1347                 if (eir & GM45_ERROR_PAGE_TABLE) {
1348                         u32 pgtbl_err = I915_READ(PGTBL_ER);
1349                         pr_err("page table error\n");
1350                         pr_err("  PGTBL_ER: 0x%08x\n", pgtbl_err);
1351                         I915_WRITE(PGTBL_ER, pgtbl_err);
1352                         POSTING_READ(PGTBL_ER);
1353                 }
1354         }
1355
1356         if (!IS_GEN2(dev)) {
1357                 if (eir & I915_ERROR_PAGE_TABLE) {
1358                         u32 pgtbl_err = I915_READ(PGTBL_ER);
1359                         pr_err("page table error\n");
1360                         pr_err("  PGTBL_ER: 0x%08x\n", pgtbl_err);
1361                         I915_WRITE(PGTBL_ER, pgtbl_err);
1362                         POSTING_READ(PGTBL_ER);
1363                 }
1364         }
1365
1366         if (eir & I915_ERROR_MEMORY_REFRESH) {
1367                 pr_err("memory refresh error:\n");
1368                 for_each_pipe(pipe)
1369                         pr_err("pipe %c stat: 0x%08x\n",
1370                                pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
1371                 /* pipestat has already been acked */
1372         }
1373         if (eir & I915_ERROR_INSTRUCTION) {
1374                 pr_err("instruction error\n");
1375                 pr_err("  INSTPM: 0x%08x\n", I915_READ(INSTPM));
1376                 for (i = 0; i < ARRAY_SIZE(instdone); i++)
1377                         pr_err("  INSTDONE_%d: 0x%08x\n", i, instdone[i]);
1378                 if (INTEL_INFO(dev)->gen < 4) {
1379                         u32 ipeir = I915_READ(IPEIR);
1380
1381                         pr_err("  IPEIR: 0x%08x\n", I915_READ(IPEIR));
1382                         pr_err("  IPEHR: 0x%08x\n", I915_READ(IPEHR));
1383                         pr_err("  ACTHD: 0x%08x\n", I915_READ(ACTHD));
1384                         I915_WRITE(IPEIR, ipeir);
1385                         POSTING_READ(IPEIR);
1386                 } else {
1387                         u32 ipeir = I915_READ(IPEIR_I965);
1388
1389                         pr_err("  IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
1390                         pr_err("  IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
1391                         pr_err("  INSTPS: 0x%08x\n", I915_READ(INSTPS));
1392                         pr_err("  ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
1393                         I915_WRITE(IPEIR_I965, ipeir);
1394                         POSTING_READ(IPEIR_I965);
1395                 }
1396         }
1397
1398         I915_WRITE(EIR, eir);
1399         POSTING_READ(EIR);
1400         eir = I915_READ(EIR);
1401         if (eir) {
1402                 /*
1403                  * some errors might have become stuck,
1404                  * mask them.
1405                  */
1406                 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
1407                 I915_WRITE(EMR, I915_READ(EMR) | eir);
1408                 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
1409         }
1410 }
1411
1412 /**
1413  * i915_handle_error - handle an error interrupt
1414  * @dev: drm device
1415  *
1416  * Do some basic checking of regsiter state at error interrupt time and
1417  * dump it to the syslog.  Also call i915_capture_error_state() to make
1418  * sure we get a record and make it available in debugfs.  Fire a uevent
1419  * so userspace knows something bad happened (should trigger collection
1420  * of a ring dump etc.).
1421  */
1422 void i915_handle_error(struct drm_device *dev, bool wedged)
1423 {
1424         struct drm_i915_private *dev_priv = dev->dev_private;
1425         struct intel_ring_buffer *ring;
1426         int i;
1427
1428         i915_capture_error_state(dev);
1429         i915_report_and_clear_eir(dev);
1430
1431         if (wedged) {
1432                 INIT_COMPLETION(dev_priv->error_completion);
1433                 atomic_set(&dev_priv->mm.wedged, 1);
1434
1435                 /*
1436                  * Wakeup waiting processes so they don't hang
1437                  */
1438                 for_each_ring(ring, dev_priv, i)
1439                         wake_up_all(&ring->irq_queue);
1440         }
1441
1442         queue_work(dev_priv->wq, &dev_priv->error_work);
1443 }
1444
1445 static void i915_pageflip_stall_check(struct drm_device *dev, int pipe)
1446 {
1447         drm_i915_private_t *dev_priv = dev->dev_private;
1448         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1449         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1450         struct drm_i915_gem_object *obj;
1451         struct intel_unpin_work *work;
1452         unsigned long flags;
1453         bool stall_detected;
1454
1455         /* Ignore early vblank irqs */
1456         if (intel_crtc == NULL)
1457                 return;
1458
1459         spin_lock_irqsave(&dev->event_lock, flags);
1460         work = intel_crtc->unpin_work;
1461
1462         if (work == NULL || work->pending || !work->enable_stall_check) {
1463                 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
1464                 spin_unlock_irqrestore(&dev->event_lock, flags);
1465                 return;
1466         }
1467
1468         /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
1469         obj = work->pending_flip_obj;
1470         if (INTEL_INFO(dev)->gen >= 4) {
1471                 int dspsurf = DSPSURF(intel_crtc->plane);
1472                 stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
1473                                         obj->gtt_offset;
1474         } else {
1475                 int dspaddr = DSPADDR(intel_crtc->plane);
1476                 stall_detected = I915_READ(dspaddr) == (obj->gtt_offset +
1477                                                         crtc->y * crtc->fb->pitches[0] +
1478                                                         crtc->x * crtc->fb->bits_per_pixel/8);
1479         }
1480
1481         spin_unlock_irqrestore(&dev->event_lock, flags);
1482
1483         if (stall_detected) {
1484                 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
1485                 intel_prepare_page_flip(dev, intel_crtc->plane);
1486         }
1487 }
1488
1489 /* Called from drm generic code, passed 'crtc' which
1490  * we use as a pipe index
1491  */
1492 static int i915_enable_vblank(struct drm_device *dev, int pipe)
1493 {
1494         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1495         unsigned long irqflags;
1496
1497         if (!i915_pipe_enabled(dev, pipe))
1498                 return -EINVAL;
1499
1500         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1501         if (INTEL_INFO(dev)->gen >= 4)
1502                 i915_enable_pipestat(dev_priv, pipe,
1503                                      PIPE_START_VBLANK_INTERRUPT_ENABLE);
1504         else
1505                 i915_enable_pipestat(dev_priv, pipe,
1506                                      PIPE_VBLANK_INTERRUPT_ENABLE);
1507
1508         /* maintain vblank delivery even in deep C-states */
1509         if (dev_priv->info->gen == 3)
1510                 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
1511         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1512
1513         return 0;
1514 }
1515
1516 static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
1517 {
1518         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1519         unsigned long irqflags;
1520
1521         if (!i915_pipe_enabled(dev, pipe))
1522                 return -EINVAL;
1523
1524         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1525         ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
1526                                     DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
1527         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1528
1529         return 0;
1530 }
1531
1532 static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
1533 {
1534         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1535         unsigned long irqflags;
1536
1537         if (!i915_pipe_enabled(dev, pipe))
1538                 return -EINVAL;
1539
1540         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1541         ironlake_enable_display_irq(dev_priv,
1542                                     DE_PIPEA_VBLANK_IVB << (5 * pipe));
1543         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1544
1545         return 0;
1546 }
1547
1548 static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
1549 {
1550         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1551         unsigned long irqflags;
1552         u32 imr;
1553
1554         if (!i915_pipe_enabled(dev, pipe))
1555                 return -EINVAL;
1556
1557         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1558         imr = I915_READ(VLV_IMR);
1559         if (pipe == 0)
1560                 imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
1561         else
1562                 imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1563         I915_WRITE(VLV_IMR, imr);
1564         i915_enable_pipestat(dev_priv, pipe,
1565                              PIPE_START_VBLANK_INTERRUPT_ENABLE);
1566         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1567
1568         return 0;
1569 }
1570
1571 /* Called from drm generic code, passed 'crtc' which
1572  * we use as a pipe index
1573  */
1574 static void i915_disable_vblank(struct drm_device *dev, int pipe)
1575 {
1576         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1577         unsigned long irqflags;
1578
1579         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1580         if (dev_priv->info->gen == 3)
1581                 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
1582
1583         i915_disable_pipestat(dev_priv, pipe,
1584                               PIPE_VBLANK_INTERRUPT_ENABLE |
1585                               PIPE_START_VBLANK_INTERRUPT_ENABLE);
1586         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1587 }
1588
1589 static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
1590 {
1591         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1592         unsigned long irqflags;
1593
1594         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1595         ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
1596                                      DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
1597         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1598 }
1599
1600 static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
1601 {
1602         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1603         unsigned long irqflags;
1604
1605         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1606         ironlake_disable_display_irq(dev_priv,
1607                                      DE_PIPEA_VBLANK_IVB << (pipe * 5));
1608         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1609 }
1610
1611 static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
1612 {
1613         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1614         unsigned long irqflags;
1615         u32 imr;
1616
1617         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1618         i915_disable_pipestat(dev_priv, pipe,
1619                               PIPE_START_VBLANK_INTERRUPT_ENABLE);
1620         imr = I915_READ(VLV_IMR);
1621         if (pipe == 0)
1622                 imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
1623         else
1624                 imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1625         I915_WRITE(VLV_IMR, imr);
1626         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1627 }
1628
1629 static u32
1630 ring_last_seqno(struct intel_ring_buffer *ring)
1631 {
1632         return list_entry(ring->request_list.prev,
1633                           struct drm_i915_gem_request, list)->seqno;
1634 }
1635
1636 static bool i915_hangcheck_ring_idle(struct intel_ring_buffer *ring, bool *err)
1637 {
1638         if (list_empty(&ring->request_list) ||
1639             i915_seqno_passed(ring->get_seqno(ring, false),
1640                               ring_last_seqno(ring))) {
1641                 /* Issue a wake-up to catch stuck h/w. */
1642                 if (waitqueue_active(&ring->irq_queue)) {
1643                         DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
1644                                   ring->name);
1645                         wake_up_all(&ring->irq_queue);
1646                         *err = true;
1647                 }
1648                 return true;
1649         }
1650         return false;
1651 }
1652
1653 static bool kick_ring(struct intel_ring_buffer *ring)
1654 {
1655         struct drm_device *dev = ring->dev;
1656         struct drm_i915_private *dev_priv = dev->dev_private;
1657         u32 tmp = I915_READ_CTL(ring);
1658         if (tmp & RING_WAIT) {
1659                 DRM_ERROR("Kicking stuck wait on %s\n",
1660                           ring->name);
1661                 I915_WRITE_CTL(ring, tmp);
1662                 return true;
1663         }
1664         return false;
1665 }
1666
1667 static bool i915_hangcheck_hung(struct drm_device *dev)
1668 {
1669         drm_i915_private_t *dev_priv = dev->dev_private;
1670
1671         if (dev_priv->hangcheck_count++ > 1) {
1672                 bool hung = true;
1673
1674                 DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
1675                 i915_handle_error(dev, true);
1676
1677                 if (!IS_GEN2(dev)) {
1678                         struct intel_ring_buffer *ring;
1679                         int i;
1680
1681                         /* Is the chip hanging on a WAIT_FOR_EVENT?
1682                          * If so we can simply poke the RB_WAIT bit
1683                          * and break the hang. This should work on
1684                          * all but the second generation chipsets.
1685                          */
1686                         for_each_ring(ring, dev_priv, i)
1687                                 hung &= !kick_ring(ring);
1688                 }
1689
1690                 return hung;
1691         }
1692
1693         return false;
1694 }
1695
1696 /**
1697  * This is called when the chip hasn't reported back with completed
1698  * batchbuffers in a long time. The first time this is called we simply record
1699  * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses
1700  * again, we assume the chip is wedged and try to fix it.
1701  */
1702 void i915_hangcheck_elapsed(unsigned long data)
1703 {
1704         struct drm_device *dev = (struct drm_device *)data;
1705         drm_i915_private_t *dev_priv = dev->dev_private;
1706         uint32_t acthd[I915_NUM_RINGS], instdone[I915_NUM_INSTDONE_REG];
1707         struct intel_ring_buffer *ring;
1708         bool err = false, idle;
1709         int i;
1710
1711         if (!i915_enable_hangcheck)
1712                 return;
1713
1714         memset(acthd, 0, sizeof(acthd));
1715         idle = true;
1716         for_each_ring(ring, dev_priv, i) {
1717             idle &= i915_hangcheck_ring_idle(ring, &err);
1718             acthd[i] = intel_ring_get_active_head(ring);
1719         }
1720
1721         /* If all work is done then ACTHD clearly hasn't advanced. */
1722         if (idle) {
1723                 if (err) {
1724                         if (i915_hangcheck_hung(dev))
1725                                 return;
1726
1727                         goto repeat;
1728                 }
1729
1730                 dev_priv->hangcheck_count = 0;
1731                 return;
1732         }
1733
1734         i915_get_extra_instdone(dev, instdone);
1735         if (memcmp(dev_priv->last_acthd, acthd, sizeof(acthd)) == 0 &&
1736             memcmp(dev_priv->prev_instdone, instdone, sizeof(instdone)) == 0) {
1737                 if (i915_hangcheck_hung(dev))
1738                         return;
1739         } else {
1740                 dev_priv->hangcheck_count = 0;
1741
1742                 memcpy(dev_priv->last_acthd, acthd, sizeof(acthd));
1743                 memcpy(dev_priv->prev_instdone, instdone, sizeof(instdone));
1744         }
1745
1746 repeat:
1747         /* Reset timer case chip hangs without another request being added */
1748         mod_timer(&dev_priv->hangcheck_timer,
1749                   round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
1750 }
1751
1752 /* drm_dma.h hooks
1753 */
1754 static void ironlake_irq_preinstall(struct drm_device *dev)
1755 {
1756         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1757
1758         atomic_set(&dev_priv->irq_received, 0);
1759
1760         I915_WRITE(HWSTAM, 0xeffe);
1761
1762         /* XXX hotplug from PCH */
1763
1764         I915_WRITE(DEIMR, 0xffffffff);
1765         I915_WRITE(DEIER, 0x0);
1766         POSTING_READ(DEIER);
1767
1768         /* and GT */
1769         I915_WRITE(GTIMR, 0xffffffff);
1770         I915_WRITE(GTIER, 0x0);
1771         POSTING_READ(GTIER);
1772
1773         /* south display irq */
1774         I915_WRITE(SDEIMR, 0xffffffff);
1775         I915_WRITE(SDEIER, 0x0);
1776         POSTING_READ(SDEIER);
1777 }
1778
1779 static void valleyview_irq_preinstall(struct drm_device *dev)
1780 {
1781         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1782         int pipe;
1783
1784         atomic_set(&dev_priv->irq_received, 0);
1785
1786         /* VLV magic */
1787         I915_WRITE(VLV_IMR, 0);
1788         I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
1789         I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
1790         I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
1791
1792         /* and GT */
1793         I915_WRITE(GTIIR, I915_READ(GTIIR));
1794         I915_WRITE(GTIIR, I915_READ(GTIIR));
1795         I915_WRITE(GTIMR, 0xffffffff);
1796         I915_WRITE(GTIER, 0x0);
1797         POSTING_READ(GTIER);
1798
1799         I915_WRITE(DPINVGTT, 0xff);
1800
1801         I915_WRITE(PORT_HOTPLUG_EN, 0);
1802         I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
1803         for_each_pipe(pipe)
1804                 I915_WRITE(PIPESTAT(pipe), 0xffff);
1805         I915_WRITE(VLV_IIR, 0xffffffff);
1806         I915_WRITE(VLV_IMR, 0xffffffff);
1807         I915_WRITE(VLV_IER, 0x0);
1808         POSTING_READ(VLV_IER);
1809 }
1810
1811 /*
1812  * Enable digital hotplug on the PCH, and configure the DP short pulse
1813  * duration to 2ms (which is the minimum in the Display Port spec)
1814  *
1815  * This register is the same on all known PCH chips.
1816  */
1817
1818 static void ironlake_enable_pch_hotplug(struct drm_device *dev)
1819 {
1820         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1821         u32     hotplug;
1822
1823         hotplug = I915_READ(PCH_PORT_HOTPLUG);
1824         hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
1825         hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
1826         hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
1827         hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
1828         I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
1829 }
1830
1831 static int ironlake_irq_postinstall(struct drm_device *dev)
1832 {
1833         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1834         /* enable kind of interrupts always enabled */
1835         u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
1836                            DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE;
1837         u32 render_irqs;
1838         u32 hotplug_mask;
1839
1840         dev_priv->irq_mask = ~display_mask;
1841
1842         /* should always can generate irq */
1843         I915_WRITE(DEIIR, I915_READ(DEIIR));
1844         I915_WRITE(DEIMR, dev_priv->irq_mask);
1845         I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK);
1846         POSTING_READ(DEIER);
1847
1848         dev_priv->gt_irq_mask = ~0;
1849
1850         I915_WRITE(GTIIR, I915_READ(GTIIR));
1851         I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1852
1853         if (IS_GEN6(dev))
1854                 render_irqs =
1855                         GT_USER_INTERRUPT |
1856                         GEN6_BSD_USER_INTERRUPT |
1857                         GEN6_BLITTER_USER_INTERRUPT;
1858         else
1859                 render_irqs =
1860                         GT_USER_INTERRUPT |
1861                         GT_PIPE_NOTIFY |
1862                         GT_BSD_USER_INTERRUPT;
1863         I915_WRITE(GTIER, render_irqs);
1864         POSTING_READ(GTIER);
1865
1866         if (HAS_PCH_CPT(dev)) {
1867                 hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1868                                 SDE_PORTB_HOTPLUG_CPT |
1869                                 SDE_PORTC_HOTPLUG_CPT |
1870                                 SDE_PORTD_HOTPLUG_CPT);
1871         } else {
1872                 hotplug_mask = (SDE_CRT_HOTPLUG |
1873                                 SDE_PORTB_HOTPLUG |
1874                                 SDE_PORTC_HOTPLUG |
1875                                 SDE_PORTD_HOTPLUG |
1876                                 SDE_AUX_MASK);
1877         }
1878
1879         dev_priv->pch_irq_mask = ~hotplug_mask;
1880
1881         I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1882         I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
1883         I915_WRITE(SDEIER, hotplug_mask);
1884         POSTING_READ(SDEIER);
1885
1886         ironlake_enable_pch_hotplug(dev);
1887
1888         if (IS_IRONLAKE_M(dev)) {
1889                 /* Clear & enable PCU event interrupts */
1890                 I915_WRITE(DEIIR, DE_PCU_EVENT);
1891                 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
1892                 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
1893         }
1894
1895         return 0;
1896 }
1897
1898 static int ivybridge_irq_postinstall(struct drm_device *dev)
1899 {
1900         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1901         /* enable kind of interrupts always enabled */
1902         u32 display_mask =
1903                 DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | DE_PCH_EVENT_IVB |
1904                 DE_PLANEC_FLIP_DONE_IVB |
1905                 DE_PLANEB_FLIP_DONE_IVB |
1906                 DE_PLANEA_FLIP_DONE_IVB;
1907         u32 render_irqs;
1908         u32 hotplug_mask;
1909
1910         dev_priv->irq_mask = ~display_mask;
1911
1912         /* should always can generate irq */
1913         I915_WRITE(DEIIR, I915_READ(DEIIR));
1914         I915_WRITE(DEIMR, dev_priv->irq_mask);
1915         I915_WRITE(DEIER,
1916                    display_mask |
1917                    DE_PIPEC_VBLANK_IVB |
1918                    DE_PIPEB_VBLANK_IVB |
1919                    DE_PIPEA_VBLANK_IVB);
1920         POSTING_READ(DEIER);
1921
1922         dev_priv->gt_irq_mask = ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
1923
1924         I915_WRITE(GTIIR, I915_READ(GTIIR));
1925         I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1926
1927         render_irqs = GT_USER_INTERRUPT | GEN6_BSD_USER_INTERRUPT |
1928                 GEN6_BLITTER_USER_INTERRUPT | GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
1929         I915_WRITE(GTIER, render_irqs);
1930         POSTING_READ(GTIER);
1931
1932         hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1933                         SDE_PORTB_HOTPLUG_CPT |
1934                         SDE_PORTC_HOTPLUG_CPT |
1935                         SDE_PORTD_HOTPLUG_CPT);
1936         dev_priv->pch_irq_mask = ~hotplug_mask;
1937
1938         I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1939         I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
1940         I915_WRITE(SDEIER, hotplug_mask);
1941         POSTING_READ(SDEIER);
1942
1943         ironlake_enable_pch_hotplug(dev);
1944
1945         return 0;
1946 }
1947
1948 static int valleyview_irq_postinstall(struct drm_device *dev)
1949 {
1950         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1951         u32 enable_mask;
1952         u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
1953         u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV;
1954         u32 render_irqs;
1955         u16 msid;
1956
1957         enable_mask = I915_DISPLAY_PORT_INTERRUPT;
1958         enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
1959                 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
1960                 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
1961                 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1962
1963         /*
1964          *Leave vblank interrupts masked initially.  enable/disable will
1965          * toggle them based on usage.
1966          */
1967         dev_priv->irq_mask = (~enable_mask) |
1968                 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
1969                 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1970
1971         dev_priv->pipestat[0] = 0;
1972         dev_priv->pipestat[1] = 0;
1973
1974         /* Hack for broken MSIs on VLV */
1975         pci_write_config_dword(dev_priv->dev->pdev, 0x94, 0xfee00000);
1976         pci_read_config_word(dev->pdev, 0x98, &msid);
1977         msid &= 0xff; /* mask out delivery bits */
1978         msid |= (1<<14);
1979         pci_write_config_word(dev_priv->dev->pdev, 0x98, msid);
1980
1981         I915_WRITE(VLV_IMR, dev_priv->irq_mask);
1982         I915_WRITE(VLV_IER, enable_mask);
1983         I915_WRITE(VLV_IIR, 0xffffffff);
1984         I915_WRITE(PIPESTAT(0), 0xffff);
1985         I915_WRITE(PIPESTAT(1), 0xffff);
1986         POSTING_READ(VLV_IER);
1987
1988         i915_enable_pipestat(dev_priv, 0, pipestat_enable);
1989         i915_enable_pipestat(dev_priv, 1, pipestat_enable);
1990
1991         I915_WRITE(VLV_IIR, 0xffffffff);
1992         I915_WRITE(VLV_IIR, 0xffffffff);
1993
1994         I915_WRITE(GTIIR, I915_READ(GTIIR));
1995         I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1996
1997         render_irqs = GT_USER_INTERRUPT | GEN6_BSD_USER_INTERRUPT |
1998                 GEN6_BLITTER_USER_INTERRUPT;
1999         I915_WRITE(GTIER, render_irqs);
2000         POSTING_READ(GTIER);
2001
2002         /* ack & enable invalid PTE error interrupts */
2003 #if 0 /* FIXME: add support to irq handler for checking these bits */
2004         I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
2005         I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
2006 #endif
2007
2008         I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
2009         /* Note HDMI and DP share bits */
2010         if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2011                 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2012         if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2013                 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2014         if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2015                 hotplug_en |= HDMID_HOTPLUG_INT_EN;
2016         if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_I915)
2017                 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2018         if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I915)
2019                 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2020         if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2021                 hotplug_en |= CRT_HOTPLUG_INT_EN;
2022                 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2023         }
2024
2025         I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2026
2027         return 0;
2028 }
2029
2030 static void valleyview_irq_uninstall(struct drm_device *dev)
2031 {
2032         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2033         int pipe;
2034
2035         if (!dev_priv)
2036                 return;
2037
2038         for_each_pipe(pipe)
2039                 I915_WRITE(PIPESTAT(pipe), 0xffff);
2040
2041         I915_WRITE(HWSTAM, 0xffffffff);
2042         I915_WRITE(PORT_HOTPLUG_EN, 0);
2043         I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2044         for_each_pipe(pipe)
2045                 I915_WRITE(PIPESTAT(pipe), 0xffff);
2046         I915_WRITE(VLV_IIR, 0xffffffff);
2047         I915_WRITE(VLV_IMR, 0xffffffff);
2048         I915_WRITE(VLV_IER, 0x0);
2049         POSTING_READ(VLV_IER);
2050 }
2051
2052 static void ironlake_irq_uninstall(struct drm_device *dev)
2053 {
2054         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2055
2056         if (!dev_priv)
2057                 return;
2058
2059         I915_WRITE(HWSTAM, 0xffffffff);
2060
2061         I915_WRITE(DEIMR, 0xffffffff);
2062         I915_WRITE(DEIER, 0x0);
2063         I915_WRITE(DEIIR, I915_READ(DEIIR));
2064
2065         I915_WRITE(GTIMR, 0xffffffff);
2066         I915_WRITE(GTIER, 0x0);
2067         I915_WRITE(GTIIR, I915_READ(GTIIR));
2068
2069         I915_WRITE(SDEIMR, 0xffffffff);
2070         I915_WRITE(SDEIER, 0x0);
2071         I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2072 }
2073
2074 static void i8xx_irq_preinstall(struct drm_device * dev)
2075 {
2076         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2077         int pipe;
2078
2079         atomic_set(&dev_priv->irq_received, 0);
2080
2081         for_each_pipe(pipe)
2082                 I915_WRITE(PIPESTAT(pipe), 0);
2083         I915_WRITE16(IMR, 0xffff);
2084         I915_WRITE16(IER, 0x0);
2085         POSTING_READ16(IER);
2086 }
2087
2088 static int i8xx_irq_postinstall(struct drm_device *dev)
2089 {
2090         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2091
2092         dev_priv->pipestat[0] = 0;
2093         dev_priv->pipestat[1] = 0;
2094
2095         I915_WRITE16(EMR,
2096                      ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2097
2098         /* Unmask the interrupts that we always want on. */
2099         dev_priv->irq_mask =
2100                 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2101                   I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2102                   I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2103                   I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2104                   I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2105         I915_WRITE16(IMR, dev_priv->irq_mask);
2106
2107         I915_WRITE16(IER,
2108                      I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2109                      I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2110                      I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2111                      I915_USER_INTERRUPT);
2112         POSTING_READ16(IER);
2113
2114         return 0;
2115 }
2116
2117 static irqreturn_t i8xx_irq_handler(int irq, void *arg)
2118 {
2119         struct drm_device *dev = (struct drm_device *) arg;
2120         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2121         u16 iir, new_iir;
2122         u32 pipe_stats[2];
2123         unsigned long irqflags;
2124         int irq_received;
2125         int pipe;
2126         u16 flip_mask =
2127                 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2128                 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2129
2130         atomic_inc(&dev_priv->irq_received);
2131
2132         iir = I915_READ16(IIR);
2133         if (iir == 0)
2134                 return IRQ_NONE;
2135
2136         while (iir & ~flip_mask) {
2137                 /* Can't rely on pipestat interrupt bit in iir as it might
2138                  * have been cleared after the pipestat interrupt was received.
2139                  * It doesn't set the bit in iir again, but it still produces
2140                  * interrupts (for non-MSI).
2141                  */
2142                 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2143                 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2144                         i915_handle_error(dev, false);
2145
2146                 for_each_pipe(pipe) {
2147                         int reg = PIPESTAT(pipe);
2148                         pipe_stats[pipe] = I915_READ(reg);
2149
2150                         /*
2151                          * Clear the PIPE*STAT regs before the IIR
2152                          */
2153                         if (pipe_stats[pipe] & 0x8000ffff) {
2154                                 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2155                                         DRM_DEBUG_DRIVER("pipe %c underrun\n",
2156                                                          pipe_name(pipe));
2157                                 I915_WRITE(reg, pipe_stats[pipe]);
2158                                 irq_received = 1;
2159                         }
2160                 }
2161                 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2162
2163                 I915_WRITE16(IIR, iir & ~flip_mask);
2164                 new_iir = I915_READ16(IIR); /* Flush posted writes */
2165
2166                 i915_update_dri1_breadcrumb(dev);
2167
2168                 if (iir & I915_USER_INTERRUPT)
2169                         notify_ring(dev, &dev_priv->ring[RCS]);
2170
2171                 if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
2172                     drm_handle_vblank(dev, 0)) {
2173                         if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) {
2174                                 intel_prepare_page_flip(dev, 0);
2175                                 intel_finish_page_flip(dev, 0);
2176                                 flip_mask &= ~I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT;
2177                         }
2178                 }
2179
2180                 if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
2181                     drm_handle_vblank(dev, 1)) {
2182                         if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) {
2183                                 intel_prepare_page_flip(dev, 1);
2184                                 intel_finish_page_flip(dev, 1);
2185                                 flip_mask &= ~I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2186                         }
2187                 }
2188
2189                 iir = new_iir;
2190         }
2191
2192         return IRQ_HANDLED;
2193 }
2194
2195 static void i8xx_irq_uninstall(struct drm_device * dev)
2196 {
2197         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2198         int pipe;
2199
2200         for_each_pipe(pipe) {
2201                 /* Clear enable bits; then clear status bits */
2202                 I915_WRITE(PIPESTAT(pipe), 0);
2203                 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
2204         }
2205         I915_WRITE16(IMR, 0xffff);
2206         I915_WRITE16(IER, 0x0);
2207         I915_WRITE16(IIR, I915_READ16(IIR));
2208 }
2209
2210 static void i915_irq_preinstall(struct drm_device * dev)
2211 {
2212         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2213         int pipe;
2214
2215         atomic_set(&dev_priv->irq_received, 0);
2216
2217         if (I915_HAS_HOTPLUG(dev)) {
2218                 I915_WRITE(PORT_HOTPLUG_EN, 0);
2219                 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2220         }
2221
2222         I915_WRITE16(HWSTAM, 0xeffe);
2223         for_each_pipe(pipe)
2224                 I915_WRITE(PIPESTAT(pipe), 0);
2225         I915_WRITE(IMR, 0xffffffff);
2226         I915_WRITE(IER, 0x0);
2227         POSTING_READ(IER);
2228 }
2229
2230 static int i915_irq_postinstall(struct drm_device *dev)
2231 {
2232         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2233         u32 enable_mask;
2234
2235         dev_priv->pipestat[0] = 0;
2236         dev_priv->pipestat[1] = 0;
2237
2238         I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2239
2240         /* Unmask the interrupts that we always want on. */
2241         dev_priv->irq_mask =
2242                 ~(I915_ASLE_INTERRUPT |
2243                   I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2244                   I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2245                   I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2246                   I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2247                   I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2248
2249         enable_mask =
2250                 I915_ASLE_INTERRUPT |
2251                 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2252                 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2253                 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2254                 I915_USER_INTERRUPT;
2255
2256         if (I915_HAS_HOTPLUG(dev)) {
2257                 /* Enable in IER... */
2258                 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
2259                 /* and unmask in IMR */
2260                 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
2261         }
2262
2263         I915_WRITE(IMR, dev_priv->irq_mask);
2264         I915_WRITE(IER, enable_mask);
2265         POSTING_READ(IER);
2266
2267         if (I915_HAS_HOTPLUG(dev)) {
2268                 u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
2269
2270                 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2271                         hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2272                 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2273                         hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2274                 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2275                         hotplug_en |= HDMID_HOTPLUG_INT_EN;
2276                 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_I915)
2277                         hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2278                 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I915)
2279                         hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2280                 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2281                         hotplug_en |= CRT_HOTPLUG_INT_EN;
2282                         hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2283                 }
2284
2285                 /* Ignore TV since it's buggy */
2286
2287                 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2288         }
2289
2290         intel_opregion_enable_asle(dev);
2291
2292         return 0;
2293 }
2294
2295 static irqreturn_t i915_irq_handler(int irq, void *arg)
2296 {
2297         struct drm_device *dev = (struct drm_device *) arg;
2298         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2299         u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
2300         unsigned long irqflags;
2301         u32 flip_mask =
2302                 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2303                 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2304         u32 flip[2] = {
2305                 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT,
2306                 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
2307         };
2308         int pipe, ret = IRQ_NONE;
2309
2310         atomic_inc(&dev_priv->irq_received);
2311
2312         iir = I915_READ(IIR);
2313         do {
2314                 bool irq_received = (iir & ~flip_mask) != 0;
2315                 bool blc_event = false;
2316
2317                 /* Can't rely on pipestat interrupt bit in iir as it might
2318                  * have been cleared after the pipestat interrupt was received.
2319                  * It doesn't set the bit in iir again, but it still produces
2320                  * interrupts (for non-MSI).
2321                  */
2322                 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2323                 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2324                         i915_handle_error(dev, false);
2325
2326                 for_each_pipe(pipe) {
2327                         int reg = PIPESTAT(pipe);
2328                         pipe_stats[pipe] = I915_READ(reg);
2329
2330                         /* Clear the PIPE*STAT regs before the IIR */
2331                         if (pipe_stats[pipe] & 0x8000ffff) {
2332                                 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2333                                         DRM_DEBUG_DRIVER("pipe %c underrun\n",
2334                                                          pipe_name(pipe));
2335                                 I915_WRITE(reg, pipe_stats[pipe]);
2336                                 irq_received = true;
2337                         }
2338                 }
2339                 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2340
2341                 if (!irq_received)
2342                         break;
2343
2344                 /* Consume port.  Then clear IIR or we'll miss events */
2345                 if ((I915_HAS_HOTPLUG(dev)) &&
2346                     (iir & I915_DISPLAY_PORT_INTERRUPT)) {
2347                         u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
2348
2349                         DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2350                                   hotplug_status);
2351                         if (hotplug_status & dev_priv->hotplug_supported_mask)
2352                                 queue_work(dev_priv->wq,
2353                                            &dev_priv->hotplug_work);
2354
2355                         I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
2356                         POSTING_READ(PORT_HOTPLUG_STAT);
2357                 }
2358
2359                 I915_WRITE(IIR, iir & ~flip_mask);
2360                 new_iir = I915_READ(IIR); /* Flush posted writes */
2361
2362                 if (iir & I915_USER_INTERRUPT)
2363                         notify_ring(dev, &dev_priv->ring[RCS]);
2364
2365                 for_each_pipe(pipe) {
2366                         int plane = pipe;
2367                         if (IS_MOBILE(dev))
2368                                 plane = !plane;
2369                         if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
2370                             drm_handle_vblank(dev, pipe)) {
2371                                 if (iir & flip[plane]) {
2372                                         intel_prepare_page_flip(dev, plane);
2373                                         intel_finish_page_flip(dev, pipe);
2374                                         flip_mask &= ~flip[plane];
2375                                 }
2376                         }
2377
2378                         if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
2379                                 blc_event = true;
2380                 }
2381
2382                 if (blc_event || (iir & I915_ASLE_INTERRUPT))
2383                         intel_opregion_asle_intr(dev);
2384
2385                 /* With MSI, interrupts are only generated when iir
2386                  * transitions from zero to nonzero.  If another bit got
2387                  * set while we were handling the existing iir bits, then
2388                  * we would never get another interrupt.
2389                  *
2390                  * This is fine on non-MSI as well, as if we hit this path
2391                  * we avoid exiting the interrupt handler only to generate
2392                  * another one.
2393                  *
2394                  * Note that for MSI this could cause a stray interrupt report
2395                  * if an interrupt landed in the time between writing IIR and
2396                  * the posting read.  This should be rare enough to never
2397                  * trigger the 99% of 100,000 interrupts test for disabling
2398                  * stray interrupts.
2399                  */
2400                 ret = IRQ_HANDLED;
2401                 iir = new_iir;
2402         } while (iir & ~flip_mask);
2403
2404         i915_update_dri1_breadcrumb(dev);
2405
2406         return ret;
2407 }
2408
2409 static void i915_irq_uninstall(struct drm_device * dev)
2410 {
2411         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2412         int pipe;
2413
2414         if (I915_HAS_HOTPLUG(dev)) {
2415                 I915_WRITE(PORT_HOTPLUG_EN, 0);
2416                 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2417         }
2418
2419         I915_WRITE16(HWSTAM, 0xffff);
2420         for_each_pipe(pipe) {
2421                 /* Clear enable bits; then clear status bits */
2422                 I915_WRITE(PIPESTAT(pipe), 0);
2423                 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
2424         }
2425         I915_WRITE(IMR, 0xffffffff);
2426         I915_WRITE(IER, 0x0);
2427
2428         I915_WRITE(IIR, I915_READ(IIR));
2429 }
2430
2431 static void i965_irq_preinstall(struct drm_device * dev)
2432 {
2433         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2434         int pipe;
2435
2436         atomic_set(&dev_priv->irq_received, 0);
2437
2438         I915_WRITE(PORT_HOTPLUG_EN, 0);
2439         I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2440
2441         I915_WRITE(HWSTAM, 0xeffe);
2442         for_each_pipe(pipe)
2443                 I915_WRITE(PIPESTAT(pipe), 0);
2444         I915_WRITE(IMR, 0xffffffff);
2445         I915_WRITE(IER, 0x0);
2446         POSTING_READ(IER);
2447 }
2448
2449 static int i965_irq_postinstall(struct drm_device *dev)
2450 {
2451         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2452         u32 hotplug_en;
2453         u32 enable_mask;
2454         u32 error_mask;
2455
2456         /* Unmask the interrupts that we always want on. */
2457         dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
2458                                I915_DISPLAY_PORT_INTERRUPT |
2459                                I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2460                                I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2461                                I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2462                                I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2463                                I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2464
2465         enable_mask = ~dev_priv->irq_mask;
2466         enable_mask |= I915_USER_INTERRUPT;
2467
2468         if (IS_G4X(dev))
2469                 enable_mask |= I915_BSD_USER_INTERRUPT;
2470
2471         dev_priv->pipestat[0] = 0;
2472         dev_priv->pipestat[1] = 0;
2473
2474         /*
2475          * Enable some error detection, note the instruction error mask
2476          * bit is reserved, so we leave it masked.
2477          */
2478         if (IS_G4X(dev)) {
2479                 error_mask = ~(GM45_ERROR_PAGE_TABLE |
2480                                GM45_ERROR_MEM_PRIV |
2481                                GM45_ERROR_CP_PRIV |
2482                                I915_ERROR_MEMORY_REFRESH);
2483         } else {
2484                 error_mask = ~(I915_ERROR_PAGE_TABLE |
2485                                I915_ERROR_MEMORY_REFRESH);
2486         }
2487         I915_WRITE(EMR, error_mask);
2488
2489         I915_WRITE(IMR, dev_priv->irq_mask);
2490         I915_WRITE(IER, enable_mask);
2491         POSTING_READ(IER);
2492
2493         /* Note HDMI and DP share hotplug bits */
2494         hotplug_en = 0;
2495         if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2496                 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2497         if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2498                 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2499         if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2500                 hotplug_en |= HDMID_HOTPLUG_INT_EN;
2501         if (IS_G4X(dev)) {
2502                 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_G4X)
2503                         hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2504                 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_G4X)
2505                         hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2506         } else {
2507                 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_I965)
2508                         hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2509                 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I965)
2510                         hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2511         }
2512         if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2513                 hotplug_en |= CRT_HOTPLUG_INT_EN;
2514
2515                 /* Programming the CRT detection parameters tends
2516                    to generate a spurious hotplug event about three
2517                    seconds later.  So just do it once.
2518                    */
2519                 if (IS_G4X(dev))
2520                         hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
2521                 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2522         }
2523
2524         /* Ignore TV since it's buggy */
2525
2526         I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2527
2528         intel_opregion_enable_asle(dev);
2529
2530         return 0;
2531 }
2532
2533 static irqreturn_t i965_irq_handler(int irq, void *arg)
2534 {
2535         struct drm_device *dev = (struct drm_device *) arg;
2536         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2537         u32 iir, new_iir;
2538         u32 pipe_stats[I915_MAX_PIPES];
2539         unsigned long irqflags;
2540         int irq_received;
2541         int ret = IRQ_NONE, pipe;
2542
2543         atomic_inc(&dev_priv->irq_received);
2544
2545         iir = I915_READ(IIR);
2546
2547         for (;;) {
2548                 bool blc_event = false;
2549
2550                 irq_received = iir != 0;
2551
2552                 /* Can't rely on pipestat interrupt bit in iir as it might
2553                  * have been cleared after the pipestat interrupt was received.
2554                  * It doesn't set the bit in iir again, but it still produces
2555                  * interrupts (for non-MSI).
2556                  */
2557                 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2558                 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2559                         i915_handle_error(dev, false);
2560
2561                 for_each_pipe(pipe) {
2562                         int reg = PIPESTAT(pipe);
2563                         pipe_stats[pipe] = I915_READ(reg);
2564
2565                         /*
2566                          * Clear the PIPE*STAT regs before the IIR
2567                          */
2568                         if (pipe_stats[pipe] & 0x8000ffff) {
2569                                 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2570                                         DRM_DEBUG_DRIVER("pipe %c underrun\n",
2571                                                          pipe_name(pipe));
2572                                 I915_WRITE(reg, pipe_stats[pipe]);
2573                                 irq_received = 1;
2574                         }
2575                 }
2576                 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2577
2578                 if (!irq_received)
2579                         break;
2580
2581                 ret = IRQ_HANDLED;
2582
2583                 /* Consume port.  Then clear IIR or we'll miss events */
2584                 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
2585                         u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
2586
2587                         DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2588                                   hotplug_status);
2589                         if (hotplug_status & dev_priv->hotplug_supported_mask)
2590                                 queue_work(dev_priv->wq,
2591                                            &dev_priv->hotplug_work);
2592
2593                         I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
2594                         I915_READ(PORT_HOTPLUG_STAT);
2595                 }
2596
2597                 I915_WRITE(IIR, iir);
2598                 new_iir = I915_READ(IIR); /* Flush posted writes */
2599
2600                 if (iir & I915_USER_INTERRUPT)
2601                         notify_ring(dev, &dev_priv->ring[RCS]);
2602                 if (iir & I915_BSD_USER_INTERRUPT)
2603                         notify_ring(dev, &dev_priv->ring[VCS]);
2604
2605                 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT)
2606                         intel_prepare_page_flip(dev, 0);
2607
2608                 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT)
2609                         intel_prepare_page_flip(dev, 1);
2610
2611                 for_each_pipe(pipe) {
2612                         if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
2613                             drm_handle_vblank(dev, pipe)) {
2614                                 i915_pageflip_stall_check(dev, pipe);
2615                                 intel_finish_page_flip(dev, pipe);
2616                         }
2617
2618                         if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
2619                                 blc_event = true;
2620                 }
2621
2622
2623                 if (blc_event || (iir & I915_ASLE_INTERRUPT))
2624                         intel_opregion_asle_intr(dev);
2625
2626                 /* With MSI, interrupts are only generated when iir
2627                  * transitions from zero to nonzero.  If another bit got
2628                  * set while we were handling the existing iir bits, then
2629                  * we would never get another interrupt.
2630                  *
2631                  * This is fine on non-MSI as well, as if we hit this path
2632                  * we avoid exiting the interrupt handler only to generate
2633                  * another one.
2634                  *
2635                  * Note that for MSI this could cause a stray interrupt report
2636                  * if an interrupt landed in the time between writing IIR and
2637                  * the posting read.  This should be rare enough to never
2638                  * trigger the 99% of 100,000 interrupts test for disabling
2639                  * stray interrupts.
2640                  */
2641                 iir = new_iir;
2642         }
2643
2644         i915_update_dri1_breadcrumb(dev);
2645
2646         return ret;
2647 }
2648
2649 static void i965_irq_uninstall(struct drm_device * dev)
2650 {
2651         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2652         int pipe;
2653
2654         if (!dev_priv)
2655                 return;
2656
2657         I915_WRITE(PORT_HOTPLUG_EN, 0);
2658         I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2659
2660         I915_WRITE(HWSTAM, 0xffffffff);
2661         for_each_pipe(pipe)
2662                 I915_WRITE(PIPESTAT(pipe), 0);
2663         I915_WRITE(IMR, 0xffffffff);
2664         I915_WRITE(IER, 0x0);
2665
2666         for_each_pipe(pipe)
2667                 I915_WRITE(PIPESTAT(pipe),
2668                            I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
2669         I915_WRITE(IIR, I915_READ(IIR));
2670 }
2671
2672 void intel_irq_init(struct drm_device *dev)
2673 {
2674         struct drm_i915_private *dev_priv = dev->dev_private;
2675
2676         INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
2677         INIT_WORK(&dev_priv->error_work, i915_error_work_func);
2678         INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
2679         INIT_WORK(&dev_priv->parity_error_work, ivybridge_parity_work);
2680
2681         dev->driver->get_vblank_counter = i915_get_vblank_counter;
2682         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
2683         if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
2684                 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
2685                 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
2686         }
2687
2688         if (drm_core_check_feature(dev, DRIVER_MODESET))
2689                 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
2690         else
2691                 dev->driver->get_vblank_timestamp = NULL;
2692         dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
2693
2694         if (IS_VALLEYVIEW(dev)) {
2695                 dev->driver->irq_handler = valleyview_irq_handler;
2696                 dev->driver->irq_preinstall = valleyview_irq_preinstall;
2697                 dev->driver->irq_postinstall = valleyview_irq_postinstall;
2698                 dev->driver->irq_uninstall = valleyview_irq_uninstall;
2699                 dev->driver->enable_vblank = valleyview_enable_vblank;
2700                 dev->driver->disable_vblank = valleyview_disable_vblank;
2701         } else if (IS_IVYBRIDGE(dev)) {
2702                 /* Share pre & uninstall handlers with ILK/SNB */
2703                 dev->driver->irq_handler = ivybridge_irq_handler;
2704                 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2705                 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
2706                 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2707                 dev->driver->enable_vblank = ivybridge_enable_vblank;
2708                 dev->driver->disable_vblank = ivybridge_disable_vblank;
2709         } else if (IS_HASWELL(dev)) {
2710                 /* Share interrupts handling with IVB */
2711                 dev->driver->irq_handler = ivybridge_irq_handler;
2712                 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2713                 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
2714                 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2715                 dev->driver->enable_vblank = ivybridge_enable_vblank;
2716                 dev->driver->disable_vblank = ivybridge_disable_vblank;
2717         } else if (HAS_PCH_SPLIT(dev)) {
2718                 dev->driver->irq_handler = ironlake_irq_handler;
2719                 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2720                 dev->driver->irq_postinstall = ironlake_irq_postinstall;
2721                 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2722                 dev->driver->enable_vblank = ironlake_enable_vblank;
2723                 dev->driver->disable_vblank = ironlake_disable_vblank;
2724         } else {
2725                 if (INTEL_INFO(dev)->gen == 2) {
2726                         dev->driver->irq_preinstall = i8xx_irq_preinstall;
2727                         dev->driver->irq_postinstall = i8xx_irq_postinstall;
2728                         dev->driver->irq_handler = i8xx_irq_handler;
2729                         dev->driver->irq_uninstall = i8xx_irq_uninstall;
2730                 } else if (INTEL_INFO(dev)->gen == 3) {
2731                         dev->driver->irq_preinstall = i915_irq_preinstall;
2732                         dev->driver->irq_postinstall = i915_irq_postinstall;
2733                         dev->driver->irq_uninstall = i915_irq_uninstall;
2734                         dev->driver->irq_handler = i915_irq_handler;
2735                 } else {
2736                         dev->driver->irq_preinstall = i965_irq_preinstall;
2737                         dev->driver->irq_postinstall = i965_irq_postinstall;
2738                         dev->driver->irq_uninstall = i965_irq_uninstall;
2739                         dev->driver->irq_handler = i965_irq_handler;
2740                 }
2741                 dev->driver->enable_vblank = i915_enable_vblank;
2742                 dev->driver->disable_vblank = i915_disable_vblank;
2743         }
2744 }