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 * $FreeBSD: src/sys/dev/drm2/i915/i915_irq.c,v 1.1 2012/05/22 11:07:44 kib Exp $ 28 */ 29 30 #include <sys/sfbuf.h> 31 32 #include <dev/drm/drmP.h> 33 #include <dev/drm/drm.h> 34 #include "i915_drm.h" 35 #include "i915_drv.h" 36 #include "intel_drv.h" 37 38 static void i915_capture_error_state(struct drm_device *dev); 39 static u32 ring_last_seqno(struct intel_ring_buffer *ring); 40 41 /** 42 * Interrupts that are always left unmasked. 43 * 44 * Since pipe events are edge-triggered from the PIPESTAT register to IIR, 45 * we leave them always unmasked in IMR and then control enabling them through 46 * PIPESTAT alone. 47 */ 48 #define I915_INTERRUPT_ENABLE_FIX \ 49 (I915_ASLE_INTERRUPT | \ 50 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | \ 51 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | \ 52 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | \ 53 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | \ 54 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) 55 56 /** Interrupts that we mask and unmask at runtime. */ 57 #define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT | I915_BSD_USER_INTERRUPT) 58 59 #define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\ 60 PIPE_VBLANK_INTERRUPT_STATUS) 61 62 #define I915_PIPE_VBLANK_ENABLE (PIPE_START_VBLANK_INTERRUPT_ENABLE |\ 63 PIPE_VBLANK_INTERRUPT_ENABLE) 64 65 #define DRM_I915_VBLANK_PIPE_ALL (DRM_I915_VBLANK_PIPE_A | \ 66 DRM_I915_VBLANK_PIPE_B) 67 68 /* For display hotplug interrupt */ 69 static void 70 ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask) 71 { 72 if ((dev_priv->irq_mask & mask) != 0) { 73 dev_priv->irq_mask &= ~mask; 74 I915_WRITE(DEIMR, dev_priv->irq_mask); 75 POSTING_READ(DEIMR); 76 } 77 } 78 79 static inline void 80 ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask) 81 { 82 if ((dev_priv->irq_mask & mask) != mask) { 83 dev_priv->irq_mask |= mask; 84 I915_WRITE(DEIMR, dev_priv->irq_mask); 85 POSTING_READ(DEIMR); 86 } 87 } 88 89 void 90 i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) 91 { 92 if ((dev_priv->pipestat[pipe] & mask) != mask) { 93 u32 reg = PIPESTAT(pipe); 94 95 dev_priv->pipestat[pipe] |= mask; 96 /* Enable the interrupt, clear any pending status */ 97 I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16)); 98 POSTING_READ(reg); 99 } 100 } 101 102 void 103 i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask) 104 { 105 if ((dev_priv->pipestat[pipe] & mask) != 0) { 106 u32 reg = PIPESTAT(pipe); 107 108 dev_priv->pipestat[pipe] &= ~mask; 109 I915_WRITE(reg, dev_priv->pipestat[pipe]); 110 POSTING_READ(reg); 111 } 112 } 113 114 /** 115 * intel_enable_asle - enable ASLE interrupt for OpRegion 116 */ 117 void intel_enable_asle(struct drm_device *dev) 118 { 119 drm_i915_private_t *dev_priv = dev->dev_private; 120 121 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE); 122 123 if (HAS_PCH_SPLIT(dev)) 124 ironlake_enable_display_irq(dev_priv, DE_GSE); 125 else { 126 i915_enable_pipestat(dev_priv, 1, 127 PIPE_LEGACY_BLC_EVENT_ENABLE); 128 if (INTEL_INFO(dev)->gen >= 4) 129 i915_enable_pipestat(dev_priv, 0, 130 PIPE_LEGACY_BLC_EVENT_ENABLE); 131 } 132 133 lockmgr(&dev_priv->irq_lock, LK_RELEASE); 134 } 135 136 /** 137 * i915_pipe_enabled - check if a pipe is enabled 138 * @dev: DRM device 139 * @pipe: pipe to check 140 * 141 * Reading certain registers when the pipe is disabled can hang the chip. 142 * Use this routine to make sure the PLL is running and the pipe is active 143 * before reading such registers if unsure. 144 */ 145 static int 146 i915_pipe_enabled(struct drm_device *dev, int pipe) 147 { 148 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 149 return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE; 150 } 151 152 /* Called from drm generic code, passed a 'crtc', which 153 * we use as a pipe index 154 */ 155 static u32 156 i915_get_vblank_counter(struct drm_device *dev, int pipe) 157 { 158 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 159 unsigned long high_frame; 160 unsigned long low_frame; 161 u32 high1, high2, low; 162 163 if (!i915_pipe_enabled(dev, pipe)) { 164 DRM_DEBUG("trying to get vblank count for disabled " 165 "pipe %c\n", pipe_name(pipe)); 166 return 0; 167 } 168 169 high_frame = PIPEFRAME(pipe); 170 low_frame = PIPEFRAMEPIXEL(pipe); 171 172 /* 173 * High & low register fields aren't synchronized, so make sure 174 * we get a low value that's stable across two reads of the high 175 * register. 176 */ 177 do { 178 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK; 179 low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK; 180 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK; 181 } while (high1 != high2); 182 183 high1 >>= PIPE_FRAME_HIGH_SHIFT; 184 low >>= PIPE_FRAME_LOW_SHIFT; 185 return (high1 << 8) | low; 186 } 187 188 static u32 189 gm45_get_vblank_counter(struct drm_device *dev, int pipe) 190 { 191 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 192 int reg = PIPE_FRMCOUNT_GM45(pipe); 193 194 if (!i915_pipe_enabled(dev, pipe)) { 195 DRM_DEBUG("i915: trying to get vblank count for disabled " 196 "pipe %c\n", pipe_name(pipe)); 197 return 0; 198 } 199 200 return I915_READ(reg); 201 } 202 203 static int 204 i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe, 205 int *vpos, int *hpos) 206 { 207 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 208 u32 vbl = 0, position = 0; 209 int vbl_start, vbl_end, htotal, vtotal; 210 bool in_vbl = true; 211 int ret = 0; 212 213 if (!i915_pipe_enabled(dev, pipe)) { 214 DRM_DEBUG("i915: trying to get scanoutpos for disabled " 215 "pipe %c\n", pipe_name(pipe)); 216 return 0; 217 } 218 219 /* Get vtotal. */ 220 vtotal = 1 + ((I915_READ(VTOTAL(pipe)) >> 16) & 0x1fff); 221 222 if (INTEL_INFO(dev)->gen >= 4) { 223 /* No obvious pixelcount register. Only query vertical 224 * scanout position from Display scan line register. 225 */ 226 position = I915_READ(PIPEDSL(pipe)); 227 228 /* Decode into vertical scanout position. Don't have 229 * horizontal scanout position. 230 */ 231 *vpos = position & 0x1fff; 232 *hpos = 0; 233 } else { 234 /* Have access to pixelcount since start of frame. 235 * We can split this into vertical and horizontal 236 * scanout position. 237 */ 238 position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT; 239 240 htotal = 1 + ((I915_READ(HTOTAL(pipe)) >> 16) & 0x1fff); 241 *vpos = position / htotal; 242 *hpos = position - (*vpos * htotal); 243 } 244 245 /* Query vblank area. */ 246 vbl = I915_READ(VBLANK(pipe)); 247 248 /* Test position against vblank region. */ 249 vbl_start = vbl & 0x1fff; 250 vbl_end = (vbl >> 16) & 0x1fff; 251 252 if ((*vpos < vbl_start) || (*vpos > vbl_end)) 253 in_vbl = false; 254 255 /* Inside "upper part" of vblank area? Apply corrective offset: */ 256 if (in_vbl && (*vpos >= vbl_start)) 257 *vpos = *vpos - vtotal; 258 259 /* Readouts valid? */ 260 if (vbl > 0) 261 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE; 262 263 /* In vblank? */ 264 if (in_vbl) 265 ret |= DRM_SCANOUTPOS_INVBL; 266 267 return ret; 268 } 269 270 static int 271 i915_get_vblank_timestamp(struct drm_device *dev, int pipe, int *max_error, 272 struct timeval *vblank_time, unsigned flags) 273 { 274 struct drm_i915_private *dev_priv = dev->dev_private; 275 struct drm_crtc *crtc; 276 277 if (pipe < 0 || pipe >= dev_priv->num_pipe) { 278 DRM_ERROR("Invalid crtc %d\n", pipe); 279 return -EINVAL; 280 } 281 282 /* Get drm_crtc to timestamp: */ 283 crtc = intel_get_crtc_for_pipe(dev, pipe); 284 if (crtc == NULL) { 285 DRM_ERROR("Invalid crtc %d\n", pipe); 286 return -EINVAL; 287 } 288 289 if (!crtc->enabled) { 290 #if 0 291 DRM_DEBUG("crtc %d is disabled\n", pipe); 292 #endif 293 return -EBUSY; 294 } 295 296 /* Helper routine in DRM core does all the work: */ 297 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error, 298 vblank_time, flags, 299 crtc); 300 } 301 302 /* 303 * Handle hotplug events outside the interrupt handler proper. 304 */ 305 static void 306 i915_hotplug_work_func(void *context, int pending) 307 { 308 drm_i915_private_t *dev_priv = context; 309 struct drm_device *dev = dev_priv->dev; 310 struct drm_mode_config *mode_config; 311 struct intel_encoder *encoder; 312 313 DRM_DEBUG("running encoder hotplug functions\n"); 314 dev_priv = context; 315 dev = dev_priv->dev; 316 317 mode_config = &dev->mode_config; 318 319 lockmgr(&mode_config->lock, LK_EXCLUSIVE); 320 DRM_DEBUG_KMS("running encoder hotplug functions\n"); 321 322 list_for_each_entry(encoder, &mode_config->encoder_list, base.head) 323 if (encoder->hot_plug) 324 encoder->hot_plug(encoder); 325 326 lockmgr(&mode_config->lock, LK_RELEASE); 327 328 /* Just fire off a uevent and let userspace tell us what to do */ 329 #if 0 330 drm_helper_hpd_irq_event(dev); 331 #endif 332 } 333 334 static void i915_handle_rps_change(struct drm_device *dev) 335 { 336 drm_i915_private_t *dev_priv = dev->dev_private; 337 u32 busy_up, busy_down, max_avg, min_avg; 338 u8 new_delay = dev_priv->cur_delay; 339 340 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG); 341 busy_up = I915_READ(RCPREVBSYTUPAVG); 342 busy_down = I915_READ(RCPREVBSYTDNAVG); 343 max_avg = I915_READ(RCBMAXAVG); 344 min_avg = I915_READ(RCBMINAVG); 345 346 /* Handle RCS change request from hw */ 347 if (busy_up > max_avg) { 348 if (dev_priv->cur_delay != dev_priv->max_delay) 349 new_delay = dev_priv->cur_delay - 1; 350 if (new_delay < dev_priv->max_delay) 351 new_delay = dev_priv->max_delay; 352 } else if (busy_down < min_avg) { 353 if (dev_priv->cur_delay != dev_priv->min_delay) 354 new_delay = dev_priv->cur_delay + 1; 355 if (new_delay > dev_priv->min_delay) 356 new_delay = dev_priv->min_delay; 357 } 358 359 if (ironlake_set_drps(dev, new_delay)) 360 dev_priv->cur_delay = new_delay; 361 362 return; 363 } 364 365 static void notify_ring(struct drm_device *dev, 366 struct intel_ring_buffer *ring) 367 { 368 struct drm_i915_private *dev_priv = dev->dev_private; 369 u32 seqno; 370 371 if (ring->obj == NULL) 372 return; 373 374 seqno = ring->get_seqno(ring); 375 376 lockmgr(&ring->irq_lock, LK_EXCLUSIVE); 377 ring->irq_seqno = seqno; 378 wakeup(ring); 379 lockmgr(&ring->irq_lock, LK_RELEASE); 380 381 if (i915_enable_hangcheck) { 382 dev_priv->hangcheck_count = 0; 383 callout_reset(&dev_priv->hangcheck_timer, 384 DRM_I915_HANGCHECK_PERIOD, i915_hangcheck_elapsed, dev); 385 } 386 } 387 388 static void 389 gen6_pm_rps_work_func(void *arg, int pending) 390 { 391 struct drm_device *dev; 392 drm_i915_private_t *dev_priv; 393 u8 new_delay; 394 u32 pm_iir, pm_imr; 395 396 dev_priv = (drm_i915_private_t *)arg; 397 dev = dev_priv->dev; 398 new_delay = dev_priv->cur_delay; 399 400 lockmgr(&dev_priv->rps_lock, LK_EXCLUSIVE); 401 pm_iir = dev_priv->pm_iir; 402 dev_priv->pm_iir = 0; 403 pm_imr = I915_READ(GEN6_PMIMR); 404 I915_WRITE(GEN6_PMIMR, 0); 405 lockmgr(&dev_priv->rps_lock, LK_RELEASE); 406 407 if (!pm_iir) 408 return; 409 410 DRM_LOCK(dev); 411 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) { 412 if (dev_priv->cur_delay != dev_priv->max_delay) 413 new_delay = dev_priv->cur_delay + 1; 414 if (new_delay > dev_priv->max_delay) 415 new_delay = dev_priv->max_delay; 416 } else if (pm_iir & (GEN6_PM_RP_DOWN_THRESHOLD | GEN6_PM_RP_DOWN_TIMEOUT)) { 417 gen6_gt_force_wake_get(dev_priv); 418 if (dev_priv->cur_delay != dev_priv->min_delay) 419 new_delay = dev_priv->cur_delay - 1; 420 if (new_delay < dev_priv->min_delay) { 421 new_delay = dev_priv->min_delay; 422 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, 423 I915_READ(GEN6_RP_INTERRUPT_LIMITS) | 424 ((new_delay << 16) & 0x3f0000)); 425 } else { 426 /* Make sure we continue to get down interrupts 427 * until we hit the minimum frequency */ 428 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, 429 I915_READ(GEN6_RP_INTERRUPT_LIMITS) & ~0x3f0000); 430 } 431 gen6_gt_force_wake_put(dev_priv); 432 } 433 434 gen6_set_rps(dev, new_delay); 435 dev_priv->cur_delay = new_delay; 436 437 /* 438 * rps_lock not held here because clearing is non-destructive. There is 439 * an *extremely* unlikely race with gen6_rps_enable() that is prevented 440 * by holding struct_mutex for the duration of the write. 441 */ 442 DRM_UNLOCK(dev); 443 } 444 445 static void pch_irq_handler(struct drm_device *dev) 446 { 447 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 448 u32 pch_iir; 449 int pipe; 450 451 pch_iir = I915_READ(SDEIIR); 452 453 if (pch_iir & SDE_AUDIO_POWER_MASK) 454 DRM_DEBUG("i915: PCH audio power change on port %d\n", 455 (pch_iir & SDE_AUDIO_POWER_MASK) >> 456 SDE_AUDIO_POWER_SHIFT); 457 458 if (pch_iir & SDE_GMBUS) 459 DRM_DEBUG("i915: PCH GMBUS interrupt\n"); 460 461 if (pch_iir & SDE_AUDIO_HDCP_MASK) 462 DRM_DEBUG("i915: PCH HDCP audio interrupt\n"); 463 464 if (pch_iir & SDE_AUDIO_TRANS_MASK) 465 DRM_DEBUG("i915: PCH transcoder audio interrupt\n"); 466 467 if (pch_iir & SDE_POISON) 468 DRM_ERROR("i915: PCH poison interrupt\n"); 469 470 if (pch_iir & SDE_FDI_MASK) 471 for_each_pipe(pipe) 472 DRM_DEBUG(" pipe %c FDI IIR: 0x%08x\n", 473 pipe_name(pipe), 474 I915_READ(FDI_RX_IIR(pipe))); 475 476 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE)) 477 DRM_DEBUG("i915: PCH transcoder CRC done interrupt\n"); 478 479 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR)) 480 DRM_DEBUG("i915: PCH transcoder CRC error interrupt\n"); 481 482 if (pch_iir & SDE_TRANSB_FIFO_UNDER) 483 DRM_DEBUG("i915: PCH transcoder B underrun interrupt\n"); 484 if (pch_iir & SDE_TRANSA_FIFO_UNDER) 485 DRM_DEBUG("PCH transcoder A underrun interrupt\n"); 486 } 487 488 static void 489 ivybridge_irq_handler(void *arg) 490 { 491 struct drm_device *dev = (struct drm_device *) arg; 492 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 493 u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir; 494 #if 0 495 struct drm_i915_master_private *master_priv; 496 #endif 497 498 atomic_inc(&dev_priv->irq_received); 499 500 /* disable master interrupt before clearing iir */ 501 de_ier = I915_READ(DEIER); 502 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); 503 POSTING_READ(DEIER); 504 505 de_iir = I915_READ(DEIIR); 506 gt_iir = I915_READ(GTIIR); 507 pch_iir = I915_READ(SDEIIR); 508 pm_iir = I915_READ(GEN6_PMIIR); 509 510 if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 && pm_iir == 0) 511 goto done; 512 513 #if 0 514 if (dev->primary->master) { 515 master_priv = dev->primary->master->driver_priv; 516 if (master_priv->sarea_priv) 517 master_priv->sarea_priv->last_dispatch = 518 READ_BREADCRUMB(dev_priv); 519 } 520 #else 521 if (dev_priv->sarea_priv) 522 dev_priv->sarea_priv->last_dispatch = 523 READ_BREADCRUMB(dev_priv); 524 #endif 525 526 if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY)) 527 notify_ring(dev, &dev_priv->rings[RCS]); 528 if (gt_iir & GT_GEN6_BSD_USER_INTERRUPT) 529 notify_ring(dev, &dev_priv->rings[VCS]); 530 if (gt_iir & GT_BLT_USER_INTERRUPT) 531 notify_ring(dev, &dev_priv->rings[BCS]); 532 533 if (de_iir & DE_GSE_IVB) { 534 #if 1 535 KIB_NOTYET(); 536 #else 537 intel_opregion_gse_intr(dev); 538 #endif 539 } 540 541 if (de_iir & DE_PLANEA_FLIP_DONE_IVB) { 542 intel_prepare_page_flip(dev, 0); 543 intel_finish_page_flip_plane(dev, 0); 544 } 545 546 if (de_iir & DE_PLANEB_FLIP_DONE_IVB) { 547 intel_prepare_page_flip(dev, 1); 548 intel_finish_page_flip_plane(dev, 1); 549 } 550 551 if (de_iir & DE_PIPEA_VBLANK_IVB) 552 drm_handle_vblank(dev, 0); 553 554 if (de_iir & DE_PIPEB_VBLANK_IVB) 555 drm_handle_vblank(dev, 1); 556 557 /* check event from PCH */ 558 if (de_iir & DE_PCH_EVENT_IVB) { 559 if (pch_iir & SDE_HOTPLUG_MASK_CPT) 560 taskqueue_enqueue(dev_priv->tq, &dev_priv->hotplug_task); 561 pch_irq_handler(dev); 562 } 563 564 if (pm_iir & GEN6_PM_DEFERRED_EVENTS) { 565 lockmgr(&dev_priv->rps_lock, LK_EXCLUSIVE); 566 if ((dev_priv->pm_iir & pm_iir) != 0) 567 kprintf("Missed a PM interrupt\n"); 568 dev_priv->pm_iir |= pm_iir; 569 I915_WRITE(GEN6_PMIMR, dev_priv->pm_iir); 570 POSTING_READ(GEN6_PMIMR); 571 lockmgr(&dev_priv->rps_lock, LK_RELEASE); 572 taskqueue_enqueue(dev_priv->tq, &dev_priv->rps_task); 573 } 574 575 /* should clear PCH hotplug event before clear CPU irq */ 576 I915_WRITE(SDEIIR, pch_iir); 577 I915_WRITE(GTIIR, gt_iir); 578 I915_WRITE(DEIIR, de_iir); 579 I915_WRITE(GEN6_PMIIR, pm_iir); 580 581 done: 582 I915_WRITE(DEIER, de_ier); 583 POSTING_READ(DEIER); 584 } 585 586 static void 587 ironlake_irq_handler(void *arg) 588 { 589 struct drm_device *dev = arg; 590 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 591 u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir; 592 u32 hotplug_mask; 593 #if 0 594 struct drm_i915_master_private *master_priv; 595 #endif 596 u32 bsd_usr_interrupt = GT_BSD_USER_INTERRUPT; 597 598 atomic_inc(&dev_priv->irq_received); 599 600 if (IS_GEN6(dev)) 601 bsd_usr_interrupt = GT_GEN6_BSD_USER_INTERRUPT; 602 603 /* disable master interrupt before clearing iir */ 604 de_ier = I915_READ(DEIER); 605 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); 606 POSTING_READ(DEIER); 607 608 de_iir = I915_READ(DEIIR); 609 gt_iir = I915_READ(GTIIR); 610 pch_iir = I915_READ(SDEIIR); 611 pm_iir = I915_READ(GEN6_PMIIR); 612 613 if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 && 614 (!IS_GEN6(dev) || pm_iir == 0)) 615 goto done; 616 617 if (HAS_PCH_CPT(dev)) 618 hotplug_mask = SDE_HOTPLUG_MASK_CPT; 619 else 620 hotplug_mask = SDE_HOTPLUG_MASK; 621 622 #if 0 623 if (dev->primary->master) { 624 master_priv = dev->primary->master->driver_priv; 625 if (master_priv->sarea_priv) 626 master_priv->sarea_priv->last_dispatch = 627 READ_BREADCRUMB(dev_priv); 628 } 629 #else 630 if (dev_priv->sarea_priv) 631 dev_priv->sarea_priv->last_dispatch = 632 READ_BREADCRUMB(dev_priv); 633 #endif 634 635 if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY)) 636 notify_ring(dev, &dev_priv->rings[RCS]); 637 if (gt_iir & bsd_usr_interrupt) 638 notify_ring(dev, &dev_priv->rings[VCS]); 639 if (gt_iir & GT_BLT_USER_INTERRUPT) 640 notify_ring(dev, &dev_priv->rings[BCS]); 641 642 if (de_iir & DE_GSE) { 643 #if 1 644 KIB_NOTYET(); 645 #else 646 intel_opregion_gse_intr(dev); 647 #endif 648 } 649 650 if (de_iir & DE_PLANEA_FLIP_DONE) { 651 intel_prepare_page_flip(dev, 0); 652 intel_finish_page_flip_plane(dev, 0); 653 } 654 655 if (de_iir & DE_PLANEB_FLIP_DONE) { 656 intel_prepare_page_flip(dev, 1); 657 intel_finish_page_flip_plane(dev, 1); 658 } 659 660 if (de_iir & DE_PIPEA_VBLANK) 661 drm_handle_vblank(dev, 0); 662 663 if (de_iir & DE_PIPEB_VBLANK) 664 drm_handle_vblank(dev, 1); 665 666 /* check event from PCH */ 667 if (de_iir & DE_PCH_EVENT) { 668 if (pch_iir & hotplug_mask) 669 taskqueue_enqueue(dev_priv->tq, 670 &dev_priv->hotplug_task); 671 pch_irq_handler(dev); 672 } 673 674 if (de_iir & DE_PCU_EVENT) { 675 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS)); 676 i915_handle_rps_change(dev); 677 } 678 679 if (pm_iir & GEN6_PM_DEFERRED_EVENTS) { 680 lockmgr(&dev_priv->rps_lock, LK_EXCLUSIVE); 681 if ((dev_priv->pm_iir & pm_iir) != 0) 682 kprintf("Missed a PM interrupt\n"); 683 dev_priv->pm_iir |= pm_iir; 684 I915_WRITE(GEN6_PMIMR, dev_priv->pm_iir); 685 POSTING_READ(GEN6_PMIMR); 686 lockmgr(&dev_priv->rps_lock, LK_RELEASE); 687 taskqueue_enqueue(dev_priv->tq, &dev_priv->rps_task); 688 } 689 690 /* should clear PCH hotplug event before clear CPU irq */ 691 I915_WRITE(SDEIIR, pch_iir); 692 I915_WRITE(GTIIR, gt_iir); 693 I915_WRITE(DEIIR, de_iir); 694 I915_WRITE(GEN6_PMIIR, pm_iir); 695 696 done: 697 I915_WRITE(DEIER, de_ier); 698 POSTING_READ(DEIER); 699 } 700 701 /** 702 * i915_error_work_func - do process context error handling work 703 * @work: work struct 704 * 705 * Fire an error uevent so userspace can see that a hang or error 706 * was detected. 707 */ 708 static void 709 i915_error_work_func(void *context, int pending) 710 { 711 drm_i915_private_t *dev_priv = context; 712 struct drm_device *dev = dev_priv->dev; 713 714 /* kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event); */ 715 716 if (atomic_load_acq_int(&dev_priv->mm.wedged)) { 717 DRM_DEBUG("i915: resetting chip\n"); 718 /* kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event); */ 719 if (!i915_reset(dev, GRDOM_RENDER)) { 720 atomic_store_rel_int(&dev_priv->mm.wedged, 0); 721 /* kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event); */ 722 } 723 lockmgr(&dev_priv->error_completion_lock, LK_EXCLUSIVE); 724 dev_priv->error_completion++; 725 wakeup(&dev_priv->error_completion); 726 lockmgr(&dev_priv->error_completion_lock, LK_RELEASE); 727 } 728 } 729 730 static void i915_report_and_clear_eir(struct drm_device *dev) 731 { 732 struct drm_i915_private *dev_priv = dev->dev_private; 733 u32 eir = I915_READ(EIR); 734 int pipe; 735 736 if (!eir) 737 return; 738 739 kprintf("i915: render error detected, EIR: 0x%08x\n", eir); 740 741 if (IS_G4X(dev)) { 742 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) { 743 u32 ipeir = I915_READ(IPEIR_I965); 744 745 kprintf(" IPEIR: 0x%08x\n", 746 I915_READ(IPEIR_I965)); 747 kprintf(" IPEHR: 0x%08x\n", 748 I915_READ(IPEHR_I965)); 749 kprintf(" INSTDONE: 0x%08x\n", 750 I915_READ(INSTDONE_I965)); 751 kprintf(" INSTPS: 0x%08x\n", 752 I915_READ(INSTPS)); 753 kprintf(" INSTDONE1: 0x%08x\n", 754 I915_READ(INSTDONE1)); 755 kprintf(" ACTHD: 0x%08x\n", 756 I915_READ(ACTHD_I965)); 757 I915_WRITE(IPEIR_I965, ipeir); 758 POSTING_READ(IPEIR_I965); 759 } 760 if (eir & GM45_ERROR_PAGE_TABLE) { 761 u32 pgtbl_err = I915_READ(PGTBL_ER); 762 kprintf("page table error\n"); 763 kprintf(" PGTBL_ER: 0x%08x\n", 764 pgtbl_err); 765 I915_WRITE(PGTBL_ER, pgtbl_err); 766 POSTING_READ(PGTBL_ER); 767 } 768 } 769 770 if (!IS_GEN2(dev)) { 771 if (eir & I915_ERROR_PAGE_TABLE) { 772 u32 pgtbl_err = I915_READ(PGTBL_ER); 773 kprintf("page table error\n"); 774 kprintf(" PGTBL_ER: 0x%08x\n", 775 pgtbl_err); 776 I915_WRITE(PGTBL_ER, pgtbl_err); 777 POSTING_READ(PGTBL_ER); 778 } 779 } 780 781 if (eir & I915_ERROR_MEMORY_REFRESH) { 782 kprintf("memory refresh error:\n"); 783 for_each_pipe(pipe) 784 kprintf("pipe %c stat: 0x%08x\n", 785 pipe_name(pipe), I915_READ(PIPESTAT(pipe))); 786 /* pipestat has already been acked */ 787 } 788 if (eir & I915_ERROR_INSTRUCTION) { 789 kprintf("instruction error\n"); 790 kprintf(" INSTPM: 0x%08x\n", 791 I915_READ(INSTPM)); 792 if (INTEL_INFO(dev)->gen < 4) { 793 u32 ipeir = I915_READ(IPEIR); 794 795 kprintf(" IPEIR: 0x%08x\n", 796 I915_READ(IPEIR)); 797 kprintf(" IPEHR: 0x%08x\n", 798 I915_READ(IPEHR)); 799 kprintf(" INSTDONE: 0x%08x\n", 800 I915_READ(INSTDONE)); 801 kprintf(" ACTHD: 0x%08x\n", 802 I915_READ(ACTHD)); 803 I915_WRITE(IPEIR, ipeir); 804 POSTING_READ(IPEIR); 805 } else { 806 u32 ipeir = I915_READ(IPEIR_I965); 807 808 kprintf(" IPEIR: 0x%08x\n", 809 I915_READ(IPEIR_I965)); 810 kprintf(" IPEHR: 0x%08x\n", 811 I915_READ(IPEHR_I965)); 812 kprintf(" INSTDONE: 0x%08x\n", 813 I915_READ(INSTDONE_I965)); 814 kprintf(" INSTPS: 0x%08x\n", 815 I915_READ(INSTPS)); 816 kprintf(" INSTDONE1: 0x%08x\n", 817 I915_READ(INSTDONE1)); 818 kprintf(" ACTHD: 0x%08x\n", 819 I915_READ(ACTHD_I965)); 820 I915_WRITE(IPEIR_I965, ipeir); 821 POSTING_READ(IPEIR_I965); 822 } 823 } 824 825 I915_WRITE(EIR, eir); 826 POSTING_READ(EIR); 827 eir = I915_READ(EIR); 828 if (eir) { 829 /* 830 * some errors might have become stuck, 831 * mask them. 832 */ 833 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir); 834 I915_WRITE(EMR, I915_READ(EMR) | eir); 835 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); 836 } 837 } 838 839 /** 840 * i915_handle_error - handle an error interrupt 841 * @dev: drm device 842 * 843 * Do some basic checking of regsiter state at error interrupt time and 844 * dump it to the syslog. Also call i915_capture_error_state() to make 845 * sure we get a record and make it available in debugfs. Fire a uevent 846 * so userspace knows something bad happened (should trigger collection 847 * of a ring dump etc.). 848 */ 849 void i915_handle_error(struct drm_device *dev, bool wedged) 850 { 851 struct drm_i915_private *dev_priv = dev->dev_private; 852 853 i915_capture_error_state(dev); 854 i915_report_and_clear_eir(dev); 855 856 if (wedged) { 857 lockmgr(&dev_priv->error_completion_lock, LK_EXCLUSIVE); 858 dev_priv->error_completion = 0; 859 dev_priv->mm.wedged = 1; 860 /* unlock acts as rel barrier for store to wedged */ 861 lockmgr(&dev_priv->error_completion_lock, LK_RELEASE); 862 863 /* 864 * Wakeup waiting processes so they don't hang 865 */ 866 lockmgr(&dev_priv->rings[RCS].irq_lock, LK_EXCLUSIVE); 867 wakeup(&dev_priv->rings[RCS]); 868 lockmgr(&dev_priv->rings[RCS].irq_lock, LK_RELEASE); 869 if (HAS_BSD(dev)) { 870 lockmgr(&dev_priv->rings[VCS].irq_lock, LK_EXCLUSIVE); 871 wakeup(&dev_priv->rings[VCS]); 872 lockmgr(&dev_priv->rings[VCS].irq_lock, LK_RELEASE); 873 } 874 if (HAS_BLT(dev)) { 875 lockmgr(&dev_priv->rings[BCS].irq_lock, LK_EXCLUSIVE); 876 wakeup(&dev_priv->rings[BCS]); 877 lockmgr(&dev_priv->rings[BCS].irq_lock, LK_RELEASE); 878 } 879 } 880 881 taskqueue_enqueue(dev_priv->tq, &dev_priv->error_task); 882 } 883 884 static void i915_pageflip_stall_check(struct drm_device *dev, int pipe) 885 { 886 drm_i915_private_t *dev_priv = dev->dev_private; 887 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; 888 struct intel_crtc *intel_crtc = to_intel_crtc(crtc); 889 struct drm_i915_gem_object *obj; 890 struct intel_unpin_work *work; 891 bool stall_detected; 892 893 /* Ignore early vblank irqs */ 894 if (intel_crtc == NULL) 895 return; 896 897 lockmgr(&dev->event_lock, LK_EXCLUSIVE); 898 work = intel_crtc->unpin_work; 899 900 if (work == NULL || work->pending || !work->enable_stall_check) { 901 /* Either the pending flip IRQ arrived, or we're too early. Don't check */ 902 lockmgr(&dev->event_lock, LK_RELEASE); 903 return; 904 } 905 906 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */ 907 obj = work->pending_flip_obj; 908 if (INTEL_INFO(dev)->gen >= 4) { 909 int dspsurf = DSPSURF(intel_crtc->plane); 910 stall_detected = I915_READ(dspsurf) == obj->gtt_offset; 911 } else { 912 int dspaddr = DSPADDR(intel_crtc->plane); 913 stall_detected = I915_READ(dspaddr) == (obj->gtt_offset + 914 crtc->y * crtc->fb->pitches[0] + 915 crtc->x * crtc->fb->bits_per_pixel/8); 916 } 917 918 lockmgr(&dev->event_lock, LK_RELEASE); 919 920 if (stall_detected) { 921 DRM_DEBUG("Pageflip stall detected\n"); 922 intel_prepare_page_flip(dev, intel_crtc->plane); 923 } 924 } 925 926 static void 927 i915_driver_irq_handler(void *arg) 928 { 929 struct drm_device *dev = (struct drm_device *)arg; 930 drm_i915_private_t *dev_priv = (drm_i915_private_t *)dev->dev_private; 931 #if 0 932 struct drm_i915_master_private *master_priv; 933 #endif 934 u32 iir, new_iir; 935 u32 pipe_stats[I915_MAX_PIPES]; 936 u32 vblank_status; 937 int vblank = 0; 938 int irq_received; 939 int pipe; 940 bool blc_event = false; 941 942 atomic_inc(&dev_priv->irq_received); 943 944 iir = I915_READ(IIR); 945 946 if (INTEL_INFO(dev)->gen >= 4) 947 vblank_status = PIPE_START_VBLANK_INTERRUPT_STATUS; 948 else 949 vblank_status = PIPE_VBLANK_INTERRUPT_STATUS; 950 951 for (;;) { 952 irq_received = iir != 0; 953 954 /* Can't rely on pipestat interrupt bit in iir as it might 955 * have been cleared after the pipestat interrupt was received. 956 * It doesn't set the bit in iir again, but it still produces 957 * interrupts (for non-MSI). 958 */ 959 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE); 960 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT) 961 i915_handle_error(dev, false); 962 963 for_each_pipe(pipe) { 964 int reg = PIPESTAT(pipe); 965 pipe_stats[pipe] = I915_READ(reg); 966 967 /* 968 * Clear the PIPE*STAT regs before the IIR 969 */ 970 if (pipe_stats[pipe] & 0x8000ffff) { 971 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS) 972 DRM_DEBUG("pipe %c underrun\n", 973 pipe_name(pipe)); 974 I915_WRITE(reg, pipe_stats[pipe]); 975 irq_received = 1; 976 } 977 } 978 lockmgr(&dev_priv->irq_lock, LK_RELEASE); 979 980 if (!irq_received) 981 break; 982 983 /* Consume port. Then clear IIR or we'll miss events */ 984 if ((I915_HAS_HOTPLUG(dev)) && 985 (iir & I915_DISPLAY_PORT_INTERRUPT)) { 986 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT); 987 988 DRM_DEBUG("i915: hotplug event received, stat 0x%08x\n", 989 hotplug_status); 990 if (hotplug_status & dev_priv->hotplug_supported_mask) 991 taskqueue_enqueue(dev_priv->tq, 992 &dev_priv->hotplug_task); 993 994 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); 995 I915_READ(PORT_HOTPLUG_STAT); 996 } 997 998 I915_WRITE(IIR, iir); 999 new_iir = I915_READ(IIR); /* Flush posted writes */ 1000 1001 #if 0 1002 if (dev->primary->master) { 1003 master_priv = dev->primary->master->driver_priv; 1004 if (master_priv->sarea_priv) 1005 master_priv->sarea_priv->last_dispatch = 1006 READ_BREADCRUMB(dev_priv); 1007 } 1008 #else 1009 if (dev_priv->sarea_priv) 1010 dev_priv->sarea_priv->last_dispatch = 1011 READ_BREADCRUMB(dev_priv); 1012 #endif 1013 1014 if (iir & I915_USER_INTERRUPT) 1015 notify_ring(dev, &dev_priv->rings[RCS]); 1016 if (iir & I915_BSD_USER_INTERRUPT) 1017 notify_ring(dev, &dev_priv->rings[VCS]); 1018 1019 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) { 1020 intel_prepare_page_flip(dev, 0); 1021 if (dev_priv->flip_pending_is_done) 1022 intel_finish_page_flip_plane(dev, 0); 1023 } 1024 1025 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) { 1026 intel_prepare_page_flip(dev, 1); 1027 if (dev_priv->flip_pending_is_done) 1028 intel_finish_page_flip_plane(dev, 1); 1029 } 1030 1031 for_each_pipe(pipe) { 1032 if (pipe_stats[pipe] & vblank_status && 1033 drm_handle_vblank(dev, pipe)) { 1034 vblank++; 1035 if (!dev_priv->flip_pending_is_done) { 1036 i915_pageflip_stall_check(dev, pipe); 1037 intel_finish_page_flip(dev, pipe); 1038 } 1039 } 1040 1041 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS) 1042 blc_event = true; 1043 } 1044 1045 1046 if (blc_event || (iir & I915_ASLE_INTERRUPT)) { 1047 #if 1 1048 KIB_NOTYET(); 1049 #else 1050 intel_opregion_asle_intr(dev); 1051 #endif 1052 } 1053 1054 /* With MSI, interrupts are only generated when iir 1055 * transitions from zero to nonzero. If another bit got 1056 * set while we were handling the existing iir bits, then 1057 * we would never get another interrupt. 1058 * 1059 * This is fine on non-MSI as well, as if we hit this path 1060 * we avoid exiting the interrupt handler only to generate 1061 * another one. 1062 * 1063 * Note that for MSI this could cause a stray interrupt report 1064 * if an interrupt landed in the time between writing IIR and 1065 * the posting read. This should be rare enough to never 1066 * trigger the 99% of 100,000 interrupts test for disabling 1067 * stray interrupts. 1068 */ 1069 iir = new_iir; 1070 } 1071 } 1072 1073 static int i915_emit_irq(struct drm_device * dev) 1074 { 1075 drm_i915_private_t *dev_priv = dev->dev_private; 1076 #if 0 1077 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; 1078 #endif 1079 1080 i915_kernel_lost_context(dev); 1081 1082 DRM_DEBUG("i915: emit_irq\n"); 1083 1084 dev_priv->counter++; 1085 if (dev_priv->counter > 0x7FFFFFFFUL) 1086 dev_priv->counter = 1; 1087 #if 0 1088 if (master_priv->sarea_priv) 1089 master_priv->sarea_priv->last_enqueue = dev_priv->counter; 1090 #else 1091 if (dev_priv->sarea_priv) 1092 dev_priv->sarea_priv->last_enqueue = dev_priv->counter; 1093 #endif 1094 1095 if (BEGIN_LP_RING(4) == 0) { 1096 OUT_RING(MI_STORE_DWORD_INDEX); 1097 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); 1098 OUT_RING(dev_priv->counter); 1099 OUT_RING(MI_USER_INTERRUPT); 1100 ADVANCE_LP_RING(); 1101 } 1102 1103 return dev_priv->counter; 1104 } 1105 1106 static int i915_wait_irq(struct drm_device * dev, int irq_nr) 1107 { 1108 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1109 #if 0 1110 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; 1111 #endif 1112 int ret; 1113 struct intel_ring_buffer *ring = LP_RING(dev_priv); 1114 1115 DRM_DEBUG("irq_nr=%d breadcrumb=%d\n", irq_nr, 1116 READ_BREADCRUMB(dev_priv)); 1117 1118 #if 0 1119 if (READ_BREADCRUMB(dev_priv) >= irq_nr) { 1120 if (master_priv->sarea_priv) 1121 master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); 1122 return 0; 1123 } 1124 1125 if (master_priv->sarea_priv) 1126 master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; 1127 #else 1128 if (READ_BREADCRUMB(dev_priv) >= irq_nr) { 1129 if (dev_priv->sarea_priv) { 1130 dev_priv->sarea_priv->last_dispatch = 1131 READ_BREADCRUMB(dev_priv); 1132 } 1133 return 0; 1134 } 1135 1136 if (dev_priv->sarea_priv) 1137 dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; 1138 #endif 1139 1140 ret = 0; 1141 lockmgr(&ring->irq_lock, LK_EXCLUSIVE); 1142 if (ring->irq_get(ring)) { 1143 DRM_UNLOCK(dev); 1144 while (ret == 0 && READ_BREADCRUMB(dev_priv) < irq_nr) { 1145 ret = -lksleep(ring, &ring->irq_lock, PCATCH, 1146 "915wtq", 3 * hz); 1147 } 1148 ring->irq_put(ring); 1149 lockmgr(&ring->irq_lock, LK_RELEASE); 1150 DRM_LOCK(dev); 1151 } else { 1152 lockmgr(&ring->irq_lock, LK_RELEASE); 1153 if (_intel_wait_for(dev, READ_BREADCRUMB(dev_priv) >= irq_nr, 1154 3000, 1, "915wir")) 1155 ret = -EBUSY; 1156 } 1157 1158 if (ret == -EBUSY) { 1159 DRM_ERROR("EBUSY -- rec: %d emitted: %d\n", 1160 READ_BREADCRUMB(dev_priv), (int)dev_priv->counter); 1161 } 1162 1163 return ret; 1164 } 1165 1166 /* Needs the lock as it touches the ring. 1167 */ 1168 int i915_irq_emit(struct drm_device *dev, void *data, 1169 struct drm_file *file_priv) 1170 { 1171 drm_i915_private_t *dev_priv = dev->dev_private; 1172 drm_i915_irq_emit_t *emit = data; 1173 int result; 1174 1175 if (!dev_priv || !LP_RING(dev_priv)->virtual_start) { 1176 DRM_ERROR("called with no initialization\n"); 1177 return -EINVAL; 1178 } 1179 1180 RING_LOCK_TEST_WITH_RETURN(dev, file_priv); 1181 1182 DRM_LOCK(dev); 1183 result = i915_emit_irq(dev); 1184 DRM_UNLOCK(dev); 1185 1186 if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) { 1187 DRM_ERROR("copy_to_user\n"); 1188 return -EFAULT; 1189 } 1190 1191 return 0; 1192 } 1193 1194 /* Doesn't need the hardware lock. 1195 */ 1196 int i915_irq_wait(struct drm_device *dev, void *data, 1197 struct drm_file *file_priv) 1198 { 1199 drm_i915_private_t *dev_priv = dev->dev_private; 1200 drm_i915_irq_wait_t *irqwait = data; 1201 1202 if (!dev_priv) { 1203 DRM_ERROR("called with no initialization\n"); 1204 return -EINVAL; 1205 } 1206 1207 return i915_wait_irq(dev, irqwait->irq_seq); 1208 } 1209 1210 /* Called from drm generic code, passed 'crtc' which 1211 * we use as a pipe index 1212 */ 1213 static int 1214 i915_enable_vblank(struct drm_device *dev, int pipe) 1215 { 1216 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1217 1218 if (!i915_pipe_enabled(dev, pipe)) 1219 return -EINVAL; 1220 1221 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE); 1222 if (INTEL_INFO(dev)->gen >= 4) 1223 i915_enable_pipestat(dev_priv, pipe, 1224 PIPE_START_VBLANK_INTERRUPT_ENABLE); 1225 else 1226 i915_enable_pipestat(dev_priv, pipe, 1227 PIPE_VBLANK_INTERRUPT_ENABLE); 1228 1229 /* maintain vblank delivery even in deep C-states */ 1230 if (dev_priv->info->gen == 3) 1231 I915_WRITE(INSTPM, INSTPM_AGPBUSY_DIS << 16); 1232 lockmgr(&dev_priv->irq_lock, LK_RELEASE); 1233 1234 return 0; 1235 } 1236 1237 static int 1238 ironlake_enable_vblank(struct drm_device *dev, int pipe) 1239 { 1240 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1241 1242 if (!i915_pipe_enabled(dev, pipe)) 1243 return -EINVAL; 1244 1245 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE); 1246 ironlake_enable_display_irq(dev_priv, (pipe == 0) ? 1247 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK); 1248 lockmgr(&dev_priv->irq_lock, LK_RELEASE); 1249 1250 return 0; 1251 } 1252 1253 static int 1254 ivybridge_enable_vblank(struct drm_device *dev, int pipe) 1255 { 1256 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1257 1258 if (!i915_pipe_enabled(dev, pipe)) 1259 return -EINVAL; 1260 1261 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE); 1262 ironlake_enable_display_irq(dev_priv, (pipe == 0) ? 1263 DE_PIPEA_VBLANK_IVB : DE_PIPEB_VBLANK_IVB); 1264 lockmgr(&dev_priv->irq_lock, LK_RELEASE); 1265 1266 return 0; 1267 } 1268 1269 1270 /* Called from drm generic code, passed 'crtc' which 1271 * we use as a pipe index 1272 */ 1273 static void 1274 i915_disable_vblank(struct drm_device *dev, int pipe) 1275 { 1276 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1277 1278 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE); 1279 if (dev_priv->info->gen == 3) 1280 I915_WRITE(INSTPM, 1281 INSTPM_AGPBUSY_DIS << 16 | INSTPM_AGPBUSY_DIS); 1282 1283 i915_disable_pipestat(dev_priv, pipe, 1284 PIPE_VBLANK_INTERRUPT_ENABLE | 1285 PIPE_START_VBLANK_INTERRUPT_ENABLE); 1286 lockmgr(&dev_priv->irq_lock, LK_RELEASE); 1287 } 1288 1289 static void 1290 ironlake_disable_vblank(struct drm_device *dev, int pipe) 1291 { 1292 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1293 1294 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE); 1295 ironlake_disable_display_irq(dev_priv, (pipe == 0) ? 1296 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK); 1297 lockmgr(&dev_priv->irq_lock, LK_RELEASE); 1298 } 1299 1300 static void 1301 ivybridge_disable_vblank(struct drm_device *dev, int pipe) 1302 { 1303 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1304 1305 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE); 1306 ironlake_disable_display_irq(dev_priv, (pipe == 0) ? 1307 DE_PIPEA_VBLANK_IVB : DE_PIPEB_VBLANK_IVB); 1308 lockmgr(&dev_priv->irq_lock, LK_RELEASE); 1309 } 1310 1311 /* Set the vblank monitor pipe 1312 */ 1313 int i915_vblank_pipe_set(struct drm_device *dev, void *data, 1314 struct drm_file *file_priv) 1315 { 1316 drm_i915_private_t *dev_priv = dev->dev_private; 1317 1318 if (!dev_priv) { 1319 DRM_ERROR("called with no initialization\n"); 1320 return -EINVAL; 1321 } 1322 1323 return 0; 1324 } 1325 1326 int i915_vblank_pipe_get(struct drm_device *dev, void *data, 1327 struct drm_file *file_priv) 1328 { 1329 drm_i915_private_t *dev_priv = dev->dev_private; 1330 drm_i915_vblank_pipe_t *pipe = data; 1331 1332 if (!dev_priv) { 1333 DRM_ERROR("called with no initialization\n"); 1334 return -EINVAL; 1335 } 1336 1337 pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; 1338 1339 return 0; 1340 } 1341 1342 /** 1343 * Schedule buffer swap at given vertical blank. 1344 */ 1345 int i915_vblank_swap(struct drm_device *dev, void *data, 1346 struct drm_file *file_priv) 1347 { 1348 /* The delayed swap mechanism was fundamentally racy, and has been 1349 * removed. The model was that the client requested a delayed flip/swap 1350 * from the kernel, then waited for vblank before continuing to perform 1351 * rendering. The problem was that the kernel might wake the client 1352 * up before it dispatched the vblank swap (since the lock has to be 1353 * held while touching the ringbuffer), in which case the client would 1354 * clear and start the next frame before the swap occurred, and 1355 * flicker would occur in addition to likely missing the vblank. 1356 * 1357 * In the absence of this ioctl, userland falls back to a correct path 1358 * of waiting for a vblank, then dispatching the swap on its own. 1359 * Context switching to userland and back is plenty fast enough for 1360 * meeting the requirements of vblank swapping. 1361 */ 1362 return -EINVAL; 1363 } 1364 1365 static u32 1366 ring_last_seqno(struct intel_ring_buffer *ring) 1367 { 1368 1369 if (list_empty(&ring->request_list)) 1370 return (0); 1371 else 1372 return (list_entry(ring->request_list.prev, 1373 struct drm_i915_gem_request, list)->seqno); 1374 } 1375 1376 static bool i915_hangcheck_ring_idle(struct intel_ring_buffer *ring, bool *err) 1377 { 1378 if (list_empty(&ring->request_list) || 1379 i915_seqno_passed(ring->get_seqno(ring), ring_last_seqno(ring))) { 1380 /* Issue a wake-up to catch stuck h/w. */ 1381 if (ring->waiting_seqno) { 1382 DRM_ERROR( 1383 "Hangcheck timer elapsed... %s idle [waiting on %d, at %d], missed IRQ?\n", 1384 ring->name, 1385 ring->waiting_seqno, 1386 ring->get_seqno(ring)); 1387 wakeup(ring); 1388 *err = true; 1389 } 1390 return true; 1391 } 1392 return false; 1393 } 1394 1395 static bool kick_ring(struct intel_ring_buffer *ring) 1396 { 1397 struct drm_device *dev = ring->dev; 1398 struct drm_i915_private *dev_priv = dev->dev_private; 1399 u32 tmp = I915_READ_CTL(ring); 1400 if (tmp & RING_WAIT) { 1401 DRM_ERROR("Kicking stuck wait on %s\n", 1402 ring->name); 1403 I915_WRITE_CTL(ring, tmp); 1404 return true; 1405 } 1406 return false; 1407 } 1408 1409 /** 1410 * This is called when the chip hasn't reported back with completed 1411 * batchbuffers in a long time. The first time this is called we simply record 1412 * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses 1413 * again, we assume the chip is wedged and try to fix it. 1414 */ 1415 void 1416 i915_hangcheck_elapsed(void *context) 1417 { 1418 struct drm_device *dev = (struct drm_device *)context; 1419 drm_i915_private_t *dev_priv = dev->dev_private; 1420 uint32_t acthd, instdone, instdone1, acthd_bsd, acthd_blt; 1421 bool err = false; 1422 1423 if (!i915_enable_hangcheck) 1424 return; 1425 1426 /* If all work is done then ACTHD clearly hasn't advanced. */ 1427 if (i915_hangcheck_ring_idle(&dev_priv->rings[RCS], &err) && 1428 i915_hangcheck_ring_idle(&dev_priv->rings[VCS], &err) && 1429 i915_hangcheck_ring_idle(&dev_priv->rings[BCS], &err)) { 1430 dev_priv->hangcheck_count = 0; 1431 if (err) 1432 goto repeat; 1433 return; 1434 } 1435 1436 if (INTEL_INFO(dev)->gen < 4) { 1437 instdone = I915_READ(INSTDONE); 1438 instdone1 = 0; 1439 } else { 1440 instdone = I915_READ(INSTDONE_I965); 1441 instdone1 = I915_READ(INSTDONE1); 1442 } 1443 acthd = intel_ring_get_active_head(&dev_priv->rings[RCS]); 1444 acthd_bsd = HAS_BSD(dev) ? 1445 intel_ring_get_active_head(&dev_priv->rings[VCS]) : 0; 1446 acthd_blt = HAS_BLT(dev) ? 1447 intel_ring_get_active_head(&dev_priv->rings[BCS]) : 0; 1448 1449 if (dev_priv->last_acthd == acthd && 1450 dev_priv->last_acthd_bsd == acthd_bsd && 1451 dev_priv->last_acthd_blt == acthd_blt && 1452 dev_priv->last_instdone == instdone && 1453 dev_priv->last_instdone1 == instdone1) { 1454 if (dev_priv->hangcheck_count++ > 1) { 1455 DRM_ERROR("Hangcheck timer elapsed... GPU hung\n"); 1456 i915_handle_error(dev, true); 1457 1458 if (!IS_GEN2(dev)) { 1459 /* Is the chip hanging on a WAIT_FOR_EVENT? 1460 * If so we can simply poke the RB_WAIT bit 1461 * and break the hang. This should work on 1462 * all but the second generation chipsets. 1463 */ 1464 if (kick_ring(&dev_priv->rings[RCS])) 1465 goto repeat; 1466 1467 if (HAS_BSD(dev) && 1468 kick_ring(&dev_priv->rings[VCS])) 1469 goto repeat; 1470 1471 if (HAS_BLT(dev) && 1472 kick_ring(&dev_priv->rings[BCS])) 1473 goto repeat; 1474 } 1475 1476 return; 1477 } 1478 } else { 1479 dev_priv->hangcheck_count = 0; 1480 1481 dev_priv->last_acthd = acthd; 1482 dev_priv->last_acthd_bsd = acthd_bsd; 1483 dev_priv->last_acthd_blt = acthd_blt; 1484 dev_priv->last_instdone = instdone; 1485 dev_priv->last_instdone1 = instdone1; 1486 } 1487 1488 repeat: 1489 /* Reset timer case chip hangs without another request being added */ 1490 callout_reset(&dev_priv->hangcheck_timer, DRM_I915_HANGCHECK_PERIOD, 1491 i915_hangcheck_elapsed, dev); 1492 } 1493 1494 /* drm_dma.h hooks 1495 */ 1496 static void 1497 ironlake_irq_preinstall(struct drm_device *dev) 1498 { 1499 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1500 1501 atomic_set(&dev_priv->irq_received, 0); 1502 1503 TASK_INIT(&dev_priv->hotplug_task, 0, i915_hotplug_work_func, 1504 dev->dev_private); 1505 TASK_INIT(&dev_priv->error_task, 0, i915_error_work_func, 1506 dev->dev_private); 1507 TASK_INIT(&dev_priv->rps_task, 0, gen6_pm_rps_work_func, 1508 dev->dev_private); 1509 1510 I915_WRITE(HWSTAM, 0xeffe); 1511 1512 /* XXX hotplug from PCH */ 1513 1514 I915_WRITE(DEIMR, 0xffffffff); 1515 I915_WRITE(DEIER, 0x0); 1516 POSTING_READ(DEIER); 1517 1518 /* and GT */ 1519 I915_WRITE(GTIMR, 0xffffffff); 1520 I915_WRITE(GTIER, 0x0); 1521 POSTING_READ(GTIER); 1522 1523 /* south display irq */ 1524 I915_WRITE(SDEIMR, 0xffffffff); 1525 I915_WRITE(SDEIER, 0x0); 1526 POSTING_READ(SDEIER); 1527 } 1528 1529 /* 1530 * Enable digital hotplug on the PCH, and configure the DP short pulse 1531 * duration to 2ms (which is the minimum in the Display Port spec) 1532 * 1533 * This register is the same on all known PCH chips. 1534 */ 1535 1536 static void ironlake_enable_pch_hotplug(struct drm_device *dev) 1537 { 1538 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1539 u32 hotplug; 1540 1541 hotplug = I915_READ(PCH_PORT_HOTPLUG); 1542 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK); 1543 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms; 1544 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms; 1545 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms; 1546 I915_WRITE(PCH_PORT_HOTPLUG, hotplug); 1547 } 1548 1549 static int ironlake_irq_postinstall(struct drm_device *dev) 1550 { 1551 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1552 /* enable kind of interrupts always enabled */ 1553 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT | 1554 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE; 1555 u32 render_irqs; 1556 u32 hotplug_mask; 1557 1558 dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; 1559 dev_priv->irq_mask = ~display_mask; 1560 1561 /* should always can generate irq */ 1562 I915_WRITE(DEIIR, I915_READ(DEIIR)); 1563 I915_WRITE(DEIMR, dev_priv->irq_mask); 1564 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK); 1565 POSTING_READ(DEIER); 1566 1567 dev_priv->gt_irq_mask = ~0; 1568 1569 I915_WRITE(GTIIR, I915_READ(GTIIR)); 1570 I915_WRITE(GTIMR, dev_priv->gt_irq_mask); 1571 1572 if (IS_GEN6(dev)) 1573 render_irqs = 1574 GT_USER_INTERRUPT | 1575 GT_GEN6_BSD_USER_INTERRUPT | 1576 GT_BLT_USER_INTERRUPT; 1577 else 1578 render_irqs = 1579 GT_USER_INTERRUPT | 1580 GT_PIPE_NOTIFY | 1581 GT_BSD_USER_INTERRUPT; 1582 I915_WRITE(GTIER, render_irqs); 1583 POSTING_READ(GTIER); 1584 1585 if (HAS_PCH_CPT(dev)) { 1586 hotplug_mask = (SDE_CRT_HOTPLUG_CPT | 1587 SDE_PORTB_HOTPLUG_CPT | 1588 SDE_PORTC_HOTPLUG_CPT | 1589 SDE_PORTD_HOTPLUG_CPT); 1590 } else { 1591 hotplug_mask = (SDE_CRT_HOTPLUG | 1592 SDE_PORTB_HOTPLUG | 1593 SDE_PORTC_HOTPLUG | 1594 SDE_PORTD_HOTPLUG | 1595 SDE_AUX_MASK); 1596 } 1597 1598 dev_priv->pch_irq_mask = ~hotplug_mask; 1599 1600 I915_WRITE(SDEIIR, I915_READ(SDEIIR)); 1601 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask); 1602 I915_WRITE(SDEIER, hotplug_mask); 1603 POSTING_READ(SDEIER); 1604 1605 ironlake_enable_pch_hotplug(dev); 1606 1607 if (IS_IRONLAKE_M(dev)) { 1608 /* Clear & enable PCU event interrupts */ 1609 I915_WRITE(DEIIR, DE_PCU_EVENT); 1610 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT); 1611 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT); 1612 } 1613 1614 return 0; 1615 } 1616 1617 static int 1618 ivybridge_irq_postinstall(struct drm_device *dev) 1619 { 1620 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1621 /* enable kind of interrupts always enabled */ 1622 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | 1623 DE_PCH_EVENT_IVB | DE_PLANEA_FLIP_DONE_IVB | 1624 DE_PLANEB_FLIP_DONE_IVB; 1625 u32 render_irqs; 1626 u32 hotplug_mask; 1627 1628 dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; 1629 dev_priv->irq_mask = ~display_mask; 1630 1631 /* should always can generate irq */ 1632 I915_WRITE(DEIIR, I915_READ(DEIIR)); 1633 I915_WRITE(DEIMR, dev_priv->irq_mask); 1634 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK_IVB | 1635 DE_PIPEB_VBLANK_IVB); 1636 POSTING_READ(DEIER); 1637 1638 dev_priv->gt_irq_mask = ~0; 1639 1640 I915_WRITE(GTIIR, I915_READ(GTIIR)); 1641 I915_WRITE(GTIMR, dev_priv->gt_irq_mask); 1642 1643 render_irqs = GT_USER_INTERRUPT | GT_GEN6_BSD_USER_INTERRUPT | 1644 GT_BLT_USER_INTERRUPT; 1645 I915_WRITE(GTIER, render_irqs); 1646 POSTING_READ(GTIER); 1647 1648 hotplug_mask = (SDE_CRT_HOTPLUG_CPT | 1649 SDE_PORTB_HOTPLUG_CPT | 1650 SDE_PORTC_HOTPLUG_CPT | 1651 SDE_PORTD_HOTPLUG_CPT); 1652 dev_priv->pch_irq_mask = ~hotplug_mask; 1653 1654 I915_WRITE(SDEIIR, I915_READ(SDEIIR)); 1655 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask); 1656 I915_WRITE(SDEIER, hotplug_mask); 1657 POSTING_READ(SDEIER); 1658 1659 ironlake_enable_pch_hotplug(dev); 1660 1661 return 0; 1662 } 1663 1664 static void 1665 i915_driver_irq_preinstall(struct drm_device * dev) 1666 { 1667 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1668 int pipe; 1669 1670 atomic_set(&dev_priv->irq_received, 0); 1671 1672 TASK_INIT(&dev_priv->hotplug_task, 0, i915_hotplug_work_func, 1673 dev->dev_private); 1674 TASK_INIT(&dev_priv->error_task, 0, i915_error_work_func, 1675 dev->dev_private); 1676 TASK_INIT(&dev_priv->rps_task, 0, gen6_pm_rps_work_func, 1677 dev->dev_private); 1678 1679 if (I915_HAS_HOTPLUG(dev)) { 1680 I915_WRITE(PORT_HOTPLUG_EN, 0); 1681 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); 1682 } 1683 1684 I915_WRITE(HWSTAM, 0xeffe); 1685 for_each_pipe(pipe) 1686 I915_WRITE(PIPESTAT(pipe), 0); 1687 I915_WRITE(IMR, 0xffffffff); 1688 I915_WRITE(IER, 0x0); 1689 POSTING_READ(IER); 1690 } 1691 1692 /* 1693 * Must be called after intel_modeset_init or hotplug interrupts won't be 1694 * enabled correctly. 1695 */ 1696 static int 1697 i915_driver_irq_postinstall(struct drm_device *dev) 1698 { 1699 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1700 u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR; 1701 u32 error_mask; 1702 1703 dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; 1704 1705 /* Unmask the interrupts that we always want on. */ 1706 dev_priv->irq_mask = ~I915_INTERRUPT_ENABLE_FIX; 1707 1708 dev_priv->pipestat[0] = 0; 1709 dev_priv->pipestat[1] = 0; 1710 1711 if (I915_HAS_HOTPLUG(dev)) { 1712 /* Enable in IER... */ 1713 enable_mask |= I915_DISPLAY_PORT_INTERRUPT; 1714 /* and unmask in IMR */ 1715 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT; 1716 } 1717 1718 /* 1719 * Enable some error detection, note the instruction error mask 1720 * bit is reserved, so we leave it masked. 1721 */ 1722 if (IS_G4X(dev)) { 1723 error_mask = ~(GM45_ERROR_PAGE_TABLE | 1724 GM45_ERROR_MEM_PRIV | 1725 GM45_ERROR_CP_PRIV | 1726 I915_ERROR_MEMORY_REFRESH); 1727 } else { 1728 error_mask = ~(I915_ERROR_PAGE_TABLE | 1729 I915_ERROR_MEMORY_REFRESH); 1730 } 1731 I915_WRITE(EMR, error_mask); 1732 1733 I915_WRITE(IMR, dev_priv->irq_mask); 1734 I915_WRITE(IER, enable_mask); 1735 POSTING_READ(IER); 1736 1737 if (I915_HAS_HOTPLUG(dev)) { 1738 u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN); 1739 1740 /* Note HDMI and DP share bits */ 1741 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS) 1742 hotplug_en |= HDMIB_HOTPLUG_INT_EN; 1743 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS) 1744 hotplug_en |= HDMIC_HOTPLUG_INT_EN; 1745 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS) 1746 hotplug_en |= HDMID_HOTPLUG_INT_EN; 1747 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS) 1748 hotplug_en |= SDVOC_HOTPLUG_INT_EN; 1749 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS) 1750 hotplug_en |= SDVOB_HOTPLUG_INT_EN; 1751 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) { 1752 hotplug_en |= CRT_HOTPLUG_INT_EN; 1753 1754 /* Programming the CRT detection parameters tends 1755 to generate a spurious hotplug event about three 1756 seconds later. So just do it once. 1757 */ 1758 if (IS_G4X(dev)) 1759 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64; 1760 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50; 1761 } 1762 1763 /* Ignore TV since it's buggy */ 1764 1765 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); 1766 } 1767 1768 #if 1 1769 KIB_NOTYET(); 1770 #else 1771 intel_opregion_enable_asle(dev); 1772 #endif 1773 1774 return 0; 1775 } 1776 1777 static void 1778 ironlake_irq_uninstall(struct drm_device *dev) 1779 { 1780 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1781 1782 if (dev_priv == NULL) 1783 return; 1784 1785 dev_priv->vblank_pipe = 0; 1786 1787 I915_WRITE(HWSTAM, 0xffffffff); 1788 1789 I915_WRITE(DEIMR, 0xffffffff); 1790 I915_WRITE(DEIER, 0x0); 1791 I915_WRITE(DEIIR, I915_READ(DEIIR)); 1792 1793 I915_WRITE(GTIMR, 0xffffffff); 1794 I915_WRITE(GTIER, 0x0); 1795 I915_WRITE(GTIIR, I915_READ(GTIIR)); 1796 1797 I915_WRITE(SDEIMR, 0xffffffff); 1798 I915_WRITE(SDEIER, 0x0); 1799 I915_WRITE(SDEIIR, I915_READ(SDEIIR)); 1800 1801 taskqueue_drain(dev_priv->tq, &dev_priv->hotplug_task); 1802 taskqueue_drain(dev_priv->tq, &dev_priv->error_task); 1803 taskqueue_drain(dev_priv->tq, &dev_priv->rps_task); 1804 } 1805 1806 static void i915_driver_irq_uninstall(struct drm_device * dev) 1807 { 1808 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 1809 int pipe; 1810 1811 if (!dev_priv) 1812 return; 1813 1814 dev_priv->vblank_pipe = 0; 1815 1816 if (I915_HAS_HOTPLUG(dev)) { 1817 I915_WRITE(PORT_HOTPLUG_EN, 0); 1818 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT)); 1819 } 1820 1821 I915_WRITE(HWSTAM, 0xffffffff); 1822 for_each_pipe(pipe) 1823 I915_WRITE(PIPESTAT(pipe), 0); 1824 I915_WRITE(IMR, 0xffffffff); 1825 I915_WRITE(IER, 0x0); 1826 1827 for_each_pipe(pipe) 1828 I915_WRITE(PIPESTAT(pipe), 1829 I915_READ(PIPESTAT(pipe)) & 0x8000ffff); 1830 I915_WRITE(IIR, I915_READ(IIR)); 1831 1832 taskqueue_drain(dev_priv->tq, &dev_priv->hotplug_task); 1833 taskqueue_drain(dev_priv->tq, &dev_priv->error_task); 1834 taskqueue_drain(dev_priv->tq, &dev_priv->rps_task); 1835 } 1836 1837 void 1838 intel_irq_init(struct drm_device *dev) 1839 { 1840 1841 dev->driver->get_vblank_counter = i915_get_vblank_counter; 1842 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */ 1843 if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev) || IS_IVYBRIDGE(dev)) { 1844 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */ 1845 dev->driver->get_vblank_counter = gm45_get_vblank_counter; 1846 } 1847 1848 if (drm_core_check_feature(dev, DRIVER_MODESET)) 1849 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp; 1850 else 1851 dev->driver->get_vblank_timestamp = NULL; 1852 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos; 1853 1854 if (IS_IVYBRIDGE(dev)) { 1855 /* Share pre & uninstall handlers with ILK/SNB */ 1856 dev->driver->irq_handler = ivybridge_irq_handler; 1857 dev->driver->irq_preinstall = ironlake_irq_preinstall; 1858 dev->driver->irq_postinstall = ivybridge_irq_postinstall; 1859 dev->driver->irq_uninstall = ironlake_irq_uninstall; 1860 dev->driver->enable_vblank = ivybridge_enable_vblank; 1861 dev->driver->disable_vblank = ivybridge_disable_vblank; 1862 } else if (HAS_PCH_SPLIT(dev)) { 1863 dev->driver->irq_handler = ironlake_irq_handler; 1864 dev->driver->irq_preinstall = ironlake_irq_preinstall; 1865 dev->driver->irq_postinstall = ironlake_irq_postinstall; 1866 dev->driver->irq_uninstall = ironlake_irq_uninstall; 1867 dev->driver->enable_vblank = ironlake_enable_vblank; 1868 dev->driver->disable_vblank = ironlake_disable_vblank; 1869 } else { 1870 dev->driver->irq_preinstall = i915_driver_irq_preinstall; 1871 dev->driver->irq_postinstall = i915_driver_irq_postinstall; 1872 dev->driver->irq_uninstall = i915_driver_irq_uninstall; 1873 dev->driver->irq_handler = i915_driver_irq_handler; 1874 dev->driver->enable_vblank = i915_enable_vblank; 1875 dev->driver->disable_vblank = i915_disable_vblank; 1876 } 1877 } 1878 1879 static struct drm_i915_error_object * 1880 i915_error_object_create(struct drm_i915_private *dev_priv, 1881 struct drm_i915_gem_object *src) 1882 { 1883 struct drm_i915_error_object *dst; 1884 struct sf_buf *sf; 1885 void *d, *s; 1886 int page, page_count; 1887 u32 reloc_offset; 1888 1889 if (src == NULL || src->pages == NULL) 1890 return NULL; 1891 1892 page_count = src->base.size / PAGE_SIZE; 1893 1894 dst = kmalloc(sizeof(*dst) + page_count * sizeof(u32 *), DRM_I915_GEM, 1895 M_NOWAIT); 1896 if (dst == NULL) 1897 return (NULL); 1898 1899 reloc_offset = src->gtt_offset; 1900 for (page = 0; page < page_count; page++) { 1901 d = kmalloc(PAGE_SIZE, DRM_I915_GEM, M_NOWAIT); 1902 if (d == NULL) 1903 goto unwind; 1904 1905 if (reloc_offset < dev_priv->mm.gtt_mappable_end) { 1906 /* Simply ignore tiling or any overlapping fence. 1907 * It's part of the error state, and this hopefully 1908 * captures what the GPU read. 1909 */ 1910 s = pmap_mapdev_attr(src->base.dev->agp->base + 1911 reloc_offset, PAGE_SIZE, PAT_WRITE_COMBINING); 1912 memcpy(d, s, PAGE_SIZE); 1913 pmap_unmapdev((vm_offset_t)s, PAGE_SIZE); 1914 } else { 1915 drm_clflush_pages(&src->pages[page], 1); 1916 1917 sf = sf_buf_alloc(src->pages[page]); 1918 if (sf != NULL) { 1919 s = (void *)(uintptr_t)sf_buf_kva(sf); 1920 memcpy(d, s, PAGE_SIZE); 1921 sf_buf_free(sf); 1922 } else { 1923 bzero(d, PAGE_SIZE); 1924 strcpy(d, "XXXKIB"); 1925 } 1926 1927 drm_clflush_pages(&src->pages[page], 1); 1928 } 1929 1930 dst->pages[page] = d; 1931 1932 reloc_offset += PAGE_SIZE; 1933 } 1934 dst->page_count = page_count; 1935 dst->gtt_offset = src->gtt_offset; 1936 1937 return (dst); 1938 1939 unwind: 1940 while (page--) 1941 drm_free(dst->pages[page], DRM_I915_GEM); 1942 drm_free(dst, DRM_I915_GEM); 1943 return (NULL); 1944 } 1945 1946 static void 1947 i915_error_object_free(struct drm_i915_error_object *obj) 1948 { 1949 int page; 1950 1951 if (obj == NULL) 1952 return; 1953 1954 for (page = 0; page < obj->page_count; page++) 1955 drm_free(obj->pages[page], DRM_I915_GEM); 1956 1957 drm_free(obj, DRM_I915_GEM); 1958 } 1959 1960 static void 1961 i915_error_state_free(struct drm_device *dev, 1962 struct drm_i915_error_state *error) 1963 { 1964 int i; 1965 1966 for (i = 0; i < DRM_ARRAY_SIZE(error->ring); i++) { 1967 i915_error_object_free(error->ring[i].batchbuffer); 1968 i915_error_object_free(error->ring[i].ringbuffer); 1969 drm_free(error->ring[i].requests, DRM_I915_GEM); 1970 } 1971 1972 drm_free(error->active_bo, DRM_I915_GEM); 1973 drm_free(error->overlay, DRM_I915_GEM); 1974 drm_free(error, DRM_I915_GEM); 1975 } 1976 1977 static u32 1978 capture_bo_list(struct drm_i915_error_buffer *err, int count, 1979 struct list_head *head) 1980 { 1981 struct drm_i915_gem_object *obj; 1982 int i = 0; 1983 1984 list_for_each_entry(obj, head, mm_list) { 1985 err->size = obj->base.size; 1986 err->name = obj->base.name; 1987 err->seqno = obj->last_rendering_seqno; 1988 err->gtt_offset = obj->gtt_offset; 1989 err->read_domains = obj->base.read_domains; 1990 err->write_domain = obj->base.write_domain; 1991 err->fence_reg = obj->fence_reg; 1992 err->pinned = 0; 1993 if (obj->pin_count > 0) 1994 err->pinned = 1; 1995 if (obj->user_pin_count > 0) 1996 err->pinned = -1; 1997 err->tiling = obj->tiling_mode; 1998 err->dirty = obj->dirty; 1999 err->purgeable = obj->madv != I915_MADV_WILLNEED; 2000 err->ring = obj->ring ? obj->ring->id : -1; 2001 err->cache_level = obj->cache_level; 2002 2003 if (++i == count) 2004 break; 2005 2006 err++; 2007 } 2008 2009 return (i); 2010 } 2011 2012 static void 2013 i915_gem_record_fences(struct drm_device *dev, 2014 struct drm_i915_error_state *error) 2015 { 2016 struct drm_i915_private *dev_priv = dev->dev_private; 2017 int i; 2018 2019 /* Fences */ 2020 switch (INTEL_INFO(dev)->gen) { 2021 case 7: 2022 case 6: 2023 for (i = 0; i < 16; i++) 2024 error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8)); 2025 break; 2026 case 5: 2027 case 4: 2028 for (i = 0; i < 16; i++) 2029 error->fence[i] = I915_READ64(FENCE_REG_965_0 + 2030 (i * 8)); 2031 break; 2032 case 3: 2033 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) 2034 for (i = 0; i < 8; i++) 2035 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + 2036 (i * 4)); 2037 case 2: 2038 for (i = 0; i < 8; i++) 2039 error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4)); 2040 break; 2041 2042 } 2043 } 2044 2045 static struct drm_i915_error_object * 2046 i915_error_first_batchbuffer(struct drm_i915_private *dev_priv, 2047 struct intel_ring_buffer *ring) 2048 { 2049 struct drm_i915_gem_object *obj; 2050 u32 seqno; 2051 2052 if (!ring->get_seqno) 2053 return (NULL); 2054 2055 seqno = ring->get_seqno(ring); 2056 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) { 2057 if (obj->ring != ring) 2058 continue; 2059 2060 if (i915_seqno_passed(seqno, obj->last_rendering_seqno)) 2061 continue; 2062 2063 if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0) 2064 continue; 2065 2066 /* We need to copy these to an anonymous buffer as the simplest 2067 * method to avoid being overwritten by userspace. 2068 */ 2069 return (i915_error_object_create(dev_priv, obj)); 2070 } 2071 2072 return NULL; 2073 } 2074 2075 static void 2076 i915_record_ring_state(struct drm_device *dev, 2077 struct drm_i915_error_state *error, 2078 struct intel_ring_buffer *ring) 2079 { 2080 struct drm_i915_private *dev_priv = dev->dev_private; 2081 2082 if (INTEL_INFO(dev)->gen >= 6) { 2083 error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base)); 2084 error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring)); 2085 error->semaphore_mboxes[ring->id][0] 2086 = I915_READ(RING_SYNC_0(ring->mmio_base)); 2087 error->semaphore_mboxes[ring->id][1] 2088 = I915_READ(RING_SYNC_1(ring->mmio_base)); 2089 } 2090 2091 if (INTEL_INFO(dev)->gen >= 4) { 2092 error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base)); 2093 error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base)); 2094 error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base)); 2095 error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base)); 2096 if (ring->id == RCS) { 2097 error->instdone1 = I915_READ(INSTDONE1); 2098 error->bbaddr = I915_READ64(BB_ADDR); 2099 } 2100 } else { 2101 error->ipeir[ring->id] = I915_READ(IPEIR); 2102 error->ipehr[ring->id] = I915_READ(IPEHR); 2103 error->instdone[ring->id] = I915_READ(INSTDONE); 2104 } 2105 2106 error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base)); 2107 error->seqno[ring->id] = ring->get_seqno(ring); 2108 error->acthd[ring->id] = intel_ring_get_active_head(ring); 2109 error->head[ring->id] = I915_READ_HEAD(ring); 2110 error->tail[ring->id] = I915_READ_TAIL(ring); 2111 2112 error->cpu_ring_head[ring->id] = ring->head; 2113 error->cpu_ring_tail[ring->id] = ring->tail; 2114 } 2115 2116 static void 2117 i915_gem_record_rings(struct drm_device *dev, 2118 struct drm_i915_error_state *error) 2119 { 2120 struct drm_i915_private *dev_priv = dev->dev_private; 2121 struct drm_i915_gem_request *request; 2122 int i, count; 2123 2124 for (i = 0; i < I915_NUM_RINGS; i++) { 2125 struct intel_ring_buffer *ring = &dev_priv->rings[i]; 2126 2127 if (ring->obj == NULL) 2128 continue; 2129 2130 i915_record_ring_state(dev, error, ring); 2131 2132 error->ring[i].batchbuffer = 2133 i915_error_first_batchbuffer(dev_priv, ring); 2134 2135 error->ring[i].ringbuffer = 2136 i915_error_object_create(dev_priv, ring->obj); 2137 2138 count = 0; 2139 list_for_each_entry(request, &ring->request_list, list) 2140 count++; 2141 2142 error->ring[i].num_requests = count; 2143 error->ring[i].requests = kmalloc(count * 2144 sizeof(struct drm_i915_error_request), DRM_I915_GEM, 2145 M_WAITOK); 2146 if (error->ring[i].requests == NULL) { 2147 error->ring[i].num_requests = 0; 2148 continue; 2149 } 2150 2151 count = 0; 2152 list_for_each_entry(request, &ring->request_list, list) { 2153 struct drm_i915_error_request *erq; 2154 2155 erq = &error->ring[i].requests[count++]; 2156 erq->seqno = request->seqno; 2157 erq->jiffies = request->emitted_jiffies; 2158 erq->tail = request->tail; 2159 } 2160 } 2161 } 2162 2163 static void 2164 i915_capture_error_state(struct drm_device *dev) 2165 { 2166 struct drm_i915_private *dev_priv = dev->dev_private; 2167 struct drm_i915_gem_object *obj; 2168 struct drm_i915_error_state *error; 2169 int i, pipe; 2170 2171 lockmgr(&dev_priv->error_lock, LK_EXCLUSIVE); 2172 error = dev_priv->first_error; 2173 lockmgr(&dev_priv->error_lock, LK_RELEASE); 2174 if (error != NULL) 2175 return; 2176 2177 /* Account for pipe specific data like PIPE*STAT */ 2178 error = kmalloc(sizeof(*error), DRM_I915_GEM, M_NOWAIT | M_ZERO); 2179 if (error == NULL) { 2180 DRM_DEBUG("out of memory, not capturing error state\n"); 2181 return; 2182 } 2183 2184 DRM_INFO("capturing error event; look for more information in " 2185 "sysctl hw.dri.%d.info.i915_error_state\n", dev->sysctl_node_idx); 2186 2187 error->eir = I915_READ(EIR); 2188 error->pgtbl_er = I915_READ(PGTBL_ER); 2189 for_each_pipe(pipe) 2190 error->pipestat[pipe] = I915_READ(PIPESTAT(pipe)); 2191 2192 if (INTEL_INFO(dev)->gen >= 6) { 2193 error->error = I915_READ(ERROR_GEN6); 2194 error->done_reg = I915_READ(DONE_REG); 2195 } 2196 2197 i915_gem_record_fences(dev, error); 2198 i915_gem_record_rings(dev, error); 2199 2200 /* Record buffers on the active and pinned lists. */ 2201 error->active_bo = NULL; 2202 error->pinned_bo = NULL; 2203 2204 i = 0; 2205 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) 2206 i++; 2207 error->active_bo_count = i; 2208 list_for_each_entry(obj, &dev_priv->mm.pinned_list, mm_list) 2209 i++; 2210 error->pinned_bo_count = i - error->active_bo_count; 2211 2212 error->active_bo = NULL; 2213 error->pinned_bo = NULL; 2214 if (i) { 2215 error->active_bo = kmalloc(sizeof(*error->active_bo) * i, 2216 DRM_I915_GEM, M_NOWAIT); 2217 if (error->active_bo) 2218 error->pinned_bo = error->active_bo + 2219 error->active_bo_count; 2220 } 2221 2222 if (error->active_bo) 2223 error->active_bo_count = capture_bo_list(error->active_bo, 2224 error->active_bo_count, &dev_priv->mm.active_list); 2225 2226 if (error->pinned_bo) 2227 error->pinned_bo_count = capture_bo_list(error->pinned_bo, 2228 error->pinned_bo_count, &dev_priv->mm.pinned_list); 2229 2230 microtime(&error->time); 2231 2232 error->overlay = intel_overlay_capture_error_state(dev); 2233 error->display = intel_display_capture_error_state(dev); 2234 2235 lockmgr(&dev_priv->error_lock, LK_EXCLUSIVE); 2236 if (dev_priv->first_error == NULL) { 2237 dev_priv->first_error = error; 2238 error = NULL; 2239 } 2240 lockmgr(&dev_priv->error_lock, LK_RELEASE); 2241 2242 if (error != NULL) 2243 i915_error_state_free(dev, error); 2244 } 2245 2246 void 2247 i915_destroy_error_state(struct drm_device *dev) 2248 { 2249 struct drm_i915_private *dev_priv = dev->dev_private; 2250 struct drm_i915_error_state *error; 2251 2252 lockmgr(&dev_priv->error_lock, LK_EXCLUSIVE); 2253 error = dev_priv->first_error; 2254 dev_priv->first_error = NULL; 2255 lockmgr(&dev_priv->error_lock, LK_RELEASE); 2256 2257 if (error != NULL) 2258 i915_error_state_free(dev, error); 2259 } 2260