1 /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
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.
29 #include <linux/sysrq.h>
30 #include <linux/slab.h>
35 #include "i915_trace.h"
36 #include "intel_drv.h"
38 #define MAX_NOPID ((u32)~0)
41 * Interrupts that are always left unmasked.
43 * Since pipe events are edge-triggered from the PIPESTAT register to IIR,
44 * we leave them always unmasked in IMR and then control enabling them through
47 #define I915_INTERRUPT_ENABLE_FIX \
48 (I915_ASLE_INTERRUPT | \
49 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | \
50 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | \
51 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | \
52 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | \
53 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
55 /** Interrupts that we mask and unmask at runtime. */
56 #define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT | I915_BSD_USER_INTERRUPT)
58 #define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\
59 PIPE_VBLANK_INTERRUPT_STATUS)
61 #define I915_PIPE_VBLANK_ENABLE (PIPE_START_VBLANK_INTERRUPT_ENABLE |\
62 PIPE_VBLANK_INTERRUPT_ENABLE)
64 #define DRM_I915_VBLANK_PIPE_ALL (DRM_I915_VBLANK_PIPE_A | \
65 DRM_I915_VBLANK_PIPE_B)
67 /* For display hotplug interrupt */
69 ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
71 if ((dev_priv->irq_mask & mask) != 0) {
72 dev_priv->irq_mask &= ~mask;
73 I915_WRITE(DEIMR, dev_priv->irq_mask);
79 ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
81 if ((dev_priv->irq_mask & mask) != mask) {
82 dev_priv->irq_mask |= mask;
83 I915_WRITE(DEIMR, dev_priv->irq_mask);
89 i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
91 if ((dev_priv->pipestat[pipe] & mask) != mask) {
92 u32 reg = PIPESTAT(pipe);
94 dev_priv->pipestat[pipe] |= mask;
95 /* Enable the interrupt, clear any pending status */
96 I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16));
102 i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
104 if ((dev_priv->pipestat[pipe] & mask) != 0) {
105 u32 reg = PIPESTAT(pipe);
107 dev_priv->pipestat[pipe] &= ~mask;
108 I915_WRITE(reg, dev_priv->pipestat[pipe]);
114 * intel_enable_asle - enable ASLE interrupt for OpRegion
116 void intel_enable_asle(struct drm_device *dev)
118 drm_i915_private_t *dev_priv = dev->dev_private;
119 unsigned long irqflags;
121 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
123 if (HAS_PCH_SPLIT(dev))
124 ironlake_enable_display_irq(dev_priv, DE_GSE);
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);
133 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
137 * i915_pipe_enabled - check if a pipe is enabled
139 * @pipe: pipe to check
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.
146 i915_pipe_enabled(struct drm_device *dev, int pipe)
148 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
149 return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
152 /* Called from drm generic code, passed a 'crtc', which
153 * we use as a pipe index
155 static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
157 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
158 unsigned long high_frame;
159 unsigned long low_frame;
160 u32 high1, high2, low;
162 if (!i915_pipe_enabled(dev, pipe)) {
163 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
164 "pipe %c\n", pipe_name(pipe));
168 high_frame = PIPEFRAME(pipe);
169 low_frame = PIPEFRAMEPIXEL(pipe);
172 * High & low register fields aren't synchronized, so make sure
173 * we get a low value that's stable across two reads of the high
177 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
178 low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
179 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
180 } while (high1 != high2);
182 high1 >>= PIPE_FRAME_HIGH_SHIFT;
183 low >>= PIPE_FRAME_LOW_SHIFT;
184 return (high1 << 8) | low;
187 static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
189 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
190 int reg = PIPE_FRMCOUNT_GM45(pipe);
192 if (!i915_pipe_enabled(dev, pipe)) {
193 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
194 "pipe %c\n", pipe_name(pipe));
198 return I915_READ(reg);
201 static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
202 int *vpos, int *hpos)
204 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
205 u32 vbl = 0, position = 0;
206 int vbl_start, vbl_end, htotal, vtotal;
210 if (!i915_pipe_enabled(dev, pipe)) {
211 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
212 "pipe %c\n", pipe_name(pipe));
217 vtotal = 1 + ((I915_READ(VTOTAL(pipe)) >> 16) & 0x1fff);
219 if (INTEL_INFO(dev)->gen >= 4) {
220 /* No obvious pixelcount register. Only query vertical
221 * scanout position from Display scan line register.
223 position = I915_READ(PIPEDSL(pipe));
225 /* Decode into vertical scanout position. Don't have
226 * horizontal scanout position.
228 *vpos = position & 0x1fff;
231 /* Have access to pixelcount since start of frame.
232 * We can split this into vertical and horizontal
235 position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
237 htotal = 1 + ((I915_READ(HTOTAL(pipe)) >> 16) & 0x1fff);
238 *vpos = position / htotal;
239 *hpos = position - (*vpos * htotal);
242 /* Query vblank area. */
243 vbl = I915_READ(VBLANK(pipe));
245 /* Test position against vblank region. */
246 vbl_start = vbl & 0x1fff;
247 vbl_end = (vbl >> 16) & 0x1fff;
249 if ((*vpos < vbl_start) || (*vpos > vbl_end))
252 /* Inside "upper part" of vblank area? Apply corrective offset: */
253 if (in_vbl && (*vpos >= vbl_start))
254 *vpos = *vpos - vtotal;
256 /* Readouts valid? */
258 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
262 ret |= DRM_SCANOUTPOS_INVBL;
267 static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
269 struct timeval *vblank_time,
272 struct drm_i915_private *dev_priv = dev->dev_private;
273 struct drm_crtc *crtc;
275 if (pipe < 0 || pipe >= dev_priv->num_pipe) {
276 DRM_ERROR("Invalid crtc %d\n", pipe);
280 /* Get drm_crtc to timestamp: */
281 crtc = intel_get_crtc_for_pipe(dev, pipe);
283 DRM_ERROR("Invalid crtc %d\n", pipe);
287 if (!crtc->enabled) {
288 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
292 /* Helper routine in DRM core does all the work: */
293 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
299 * Handle hotplug events outside the interrupt handler proper.
301 static void i915_hotplug_work_func(struct work_struct *work)
303 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
305 struct drm_device *dev = dev_priv->dev;
306 struct drm_mode_config *mode_config = &dev->mode_config;
307 struct intel_encoder *encoder;
309 mutex_lock(&mode_config->mutex);
310 DRM_DEBUG_KMS("running encoder hotplug functions\n");
312 list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
313 if (encoder->hot_plug)
314 encoder->hot_plug(encoder);
316 mutex_unlock(&mode_config->mutex);
318 /* Just fire off a uevent and let userspace tell us what to do */
319 drm_helper_hpd_irq_event(dev);
322 static void i915_handle_rps_change(struct drm_device *dev)
324 drm_i915_private_t *dev_priv = dev->dev_private;
325 u32 busy_up, busy_down, max_avg, min_avg;
326 u8 new_delay = dev_priv->cur_delay;
328 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
329 busy_up = I915_READ(RCPREVBSYTUPAVG);
330 busy_down = I915_READ(RCPREVBSYTDNAVG);
331 max_avg = I915_READ(RCBMAXAVG);
332 min_avg = I915_READ(RCBMINAVG);
334 /* Handle RCS change request from hw */
335 if (busy_up > max_avg) {
336 if (dev_priv->cur_delay != dev_priv->max_delay)
337 new_delay = dev_priv->cur_delay - 1;
338 if (new_delay < dev_priv->max_delay)
339 new_delay = dev_priv->max_delay;
340 } else if (busy_down < min_avg) {
341 if (dev_priv->cur_delay != dev_priv->min_delay)
342 new_delay = dev_priv->cur_delay + 1;
343 if (new_delay > dev_priv->min_delay)
344 new_delay = dev_priv->min_delay;
347 if (ironlake_set_drps(dev, new_delay))
348 dev_priv->cur_delay = new_delay;
353 static void notify_ring(struct drm_device *dev,
354 struct intel_ring_buffer *ring)
356 struct drm_i915_private *dev_priv = dev->dev_private;
359 if (ring->obj == NULL)
362 seqno = ring->get_seqno(ring);
363 trace_i915_gem_request_complete(ring, seqno);
365 ring->irq_seqno = seqno;
366 wake_up_all(&ring->irq_queue);
367 if (i915_enable_hangcheck) {
368 dev_priv->hangcheck_count = 0;
369 mod_timer(&dev_priv->hangcheck_timer,
371 msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
375 static void gen6_pm_rps_work(struct work_struct *work)
377 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
379 u8 new_delay = dev_priv->cur_delay;
382 spin_lock_irq(&dev_priv->rps_lock);
383 pm_iir = dev_priv->pm_iir;
384 dev_priv->pm_iir = 0;
385 pm_imr = I915_READ(GEN6_PMIMR);
386 I915_WRITE(GEN6_PMIMR, 0);
387 spin_unlock_irq(&dev_priv->rps_lock);
392 mutex_lock(&dev_priv->dev->struct_mutex);
393 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
394 if (dev_priv->cur_delay != dev_priv->max_delay)
395 new_delay = dev_priv->cur_delay + 1;
396 if (new_delay > dev_priv->max_delay)
397 new_delay = dev_priv->max_delay;
398 } else if (pm_iir & (GEN6_PM_RP_DOWN_THRESHOLD | GEN6_PM_RP_DOWN_TIMEOUT)) {
399 gen6_gt_force_wake_get(dev_priv);
400 if (dev_priv->cur_delay != dev_priv->min_delay)
401 new_delay = dev_priv->cur_delay - 1;
402 if (new_delay < dev_priv->min_delay) {
403 new_delay = dev_priv->min_delay;
404 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
405 I915_READ(GEN6_RP_INTERRUPT_LIMITS) |
406 ((new_delay << 16) & 0x3f0000));
408 /* Make sure we continue to get down interrupts
409 * until we hit the minimum frequency */
410 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
411 I915_READ(GEN6_RP_INTERRUPT_LIMITS) & ~0x3f0000);
413 gen6_gt_force_wake_put(dev_priv);
416 gen6_set_rps(dev_priv->dev, new_delay);
417 dev_priv->cur_delay = new_delay;
420 * rps_lock not held here because clearing is non-destructive. There is
421 * an *extremely* unlikely race with gen6_rps_enable() that is prevented
422 * by holding struct_mutex for the duration of the write.
424 mutex_unlock(&dev_priv->dev->struct_mutex);
427 static void pch_irq_handler(struct drm_device *dev)
429 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
433 pch_iir = I915_READ(SDEIIR);
435 if (pch_iir & SDE_AUDIO_POWER_MASK)
436 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
437 (pch_iir & SDE_AUDIO_POWER_MASK) >>
438 SDE_AUDIO_POWER_SHIFT);
440 if (pch_iir & SDE_GMBUS)
441 DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
443 if (pch_iir & SDE_AUDIO_HDCP_MASK)
444 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
446 if (pch_iir & SDE_AUDIO_TRANS_MASK)
447 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
449 if (pch_iir & SDE_POISON)
450 DRM_ERROR("PCH poison interrupt\n");
452 if (pch_iir & SDE_FDI_MASK)
454 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
456 I915_READ(FDI_RX_IIR(pipe)));
458 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
459 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
461 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
462 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
464 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
465 DRM_DEBUG_DRIVER("PCH transcoder B underrun interrupt\n");
466 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
467 DRM_DEBUG_DRIVER("PCH transcoder A underrun interrupt\n");
470 static irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS)
472 struct drm_device *dev = (struct drm_device *) arg;
473 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
475 u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir;
476 struct drm_i915_master_private *master_priv;
478 atomic_inc(&dev_priv->irq_received);
480 /* disable master interrupt before clearing iir */
481 de_ier = I915_READ(DEIER);
482 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
485 de_iir = I915_READ(DEIIR);
486 gt_iir = I915_READ(GTIIR);
487 pch_iir = I915_READ(SDEIIR);
488 pm_iir = I915_READ(GEN6_PMIIR);
490 if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 && pm_iir == 0)
495 if (dev->primary->master) {
496 master_priv = dev->primary->master->driver_priv;
497 if (master_priv->sarea_priv)
498 master_priv->sarea_priv->last_dispatch =
499 READ_BREADCRUMB(dev_priv);
502 if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY))
503 notify_ring(dev, &dev_priv->ring[RCS]);
504 if (gt_iir & GT_GEN6_BSD_USER_INTERRUPT)
505 notify_ring(dev, &dev_priv->ring[VCS]);
506 if (gt_iir & GT_BLT_USER_INTERRUPT)
507 notify_ring(dev, &dev_priv->ring[BCS]);
509 if (de_iir & DE_GSE_IVB)
510 intel_opregion_gse_intr(dev);
512 if (de_iir & DE_PLANEA_FLIP_DONE_IVB) {
513 intel_prepare_page_flip(dev, 0);
514 intel_finish_page_flip_plane(dev, 0);
517 if (de_iir & DE_PLANEB_FLIP_DONE_IVB) {
518 intel_prepare_page_flip(dev, 1);
519 intel_finish_page_flip_plane(dev, 1);
522 if (de_iir & DE_PIPEA_VBLANK_IVB)
523 drm_handle_vblank(dev, 0);
525 if (de_iir & DE_PIPEB_VBLANK_IVB)
526 drm_handle_vblank(dev, 1);
528 /* check event from PCH */
529 if (de_iir & DE_PCH_EVENT_IVB) {
530 if (pch_iir & SDE_HOTPLUG_MASK_CPT)
531 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
532 pch_irq_handler(dev);
535 if (pm_iir & GEN6_PM_DEFERRED_EVENTS) {
537 spin_lock_irqsave(&dev_priv->rps_lock, flags);
538 WARN(dev_priv->pm_iir & pm_iir, "Missed a PM interrupt\n");
539 dev_priv->pm_iir |= pm_iir;
540 I915_WRITE(GEN6_PMIMR, dev_priv->pm_iir);
541 POSTING_READ(GEN6_PMIMR);
542 spin_unlock_irqrestore(&dev_priv->rps_lock, flags);
543 queue_work(dev_priv->wq, &dev_priv->rps_work);
546 /* should clear PCH hotplug event before clear CPU irq */
547 I915_WRITE(SDEIIR, pch_iir);
548 I915_WRITE(GTIIR, gt_iir);
549 I915_WRITE(DEIIR, de_iir);
550 I915_WRITE(GEN6_PMIIR, pm_iir);
553 I915_WRITE(DEIER, de_ier);
559 static irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS)
561 struct drm_device *dev = (struct drm_device *) arg;
562 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
564 u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir;
566 struct drm_i915_master_private *master_priv;
567 u32 bsd_usr_interrupt = GT_BSD_USER_INTERRUPT;
569 atomic_inc(&dev_priv->irq_received);
572 bsd_usr_interrupt = GT_GEN6_BSD_USER_INTERRUPT;
574 /* disable master interrupt before clearing iir */
575 de_ier = I915_READ(DEIER);
576 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
579 de_iir = I915_READ(DEIIR);
580 gt_iir = I915_READ(GTIIR);
581 pch_iir = I915_READ(SDEIIR);
582 pm_iir = I915_READ(GEN6_PMIIR);
584 if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 &&
585 (!IS_GEN6(dev) || pm_iir == 0))
588 if (HAS_PCH_CPT(dev))
589 hotplug_mask = SDE_HOTPLUG_MASK_CPT;
591 hotplug_mask = SDE_HOTPLUG_MASK;
595 if (dev->primary->master) {
596 master_priv = dev->primary->master->driver_priv;
597 if (master_priv->sarea_priv)
598 master_priv->sarea_priv->last_dispatch =
599 READ_BREADCRUMB(dev_priv);
602 if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY))
603 notify_ring(dev, &dev_priv->ring[RCS]);
604 if (gt_iir & bsd_usr_interrupt)
605 notify_ring(dev, &dev_priv->ring[VCS]);
606 if (gt_iir & GT_BLT_USER_INTERRUPT)
607 notify_ring(dev, &dev_priv->ring[BCS]);
610 intel_opregion_gse_intr(dev);
612 if (de_iir & DE_PLANEA_FLIP_DONE) {
613 intel_prepare_page_flip(dev, 0);
614 intel_finish_page_flip_plane(dev, 0);
617 if (de_iir & DE_PLANEB_FLIP_DONE) {
618 intel_prepare_page_flip(dev, 1);
619 intel_finish_page_flip_plane(dev, 1);
622 if (de_iir & DE_PIPEA_VBLANK)
623 drm_handle_vblank(dev, 0);
625 if (de_iir & DE_PIPEB_VBLANK)
626 drm_handle_vblank(dev, 1);
628 /* check event from PCH */
629 if (de_iir & DE_PCH_EVENT) {
630 if (pch_iir & hotplug_mask)
631 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
632 pch_irq_handler(dev);
635 if (de_iir & DE_PCU_EVENT) {
636 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
637 i915_handle_rps_change(dev);
640 if (IS_GEN6(dev) && pm_iir & GEN6_PM_DEFERRED_EVENTS) {
642 * IIR bits should never already be set because IMR should
643 * prevent an interrupt from being shown in IIR. The warning
644 * displays a case where we've unsafely cleared
645 * dev_priv->pm_iir. Although missing an interrupt of the same
646 * type is not a problem, it displays a problem in the logic.
648 * The mask bit in IMR is cleared by rps_work.
651 spin_lock_irqsave(&dev_priv->rps_lock, flags);
652 WARN(dev_priv->pm_iir & pm_iir, "Missed a PM interrupt\n");
653 dev_priv->pm_iir |= pm_iir;
654 I915_WRITE(GEN6_PMIMR, dev_priv->pm_iir);
655 POSTING_READ(GEN6_PMIMR);
656 spin_unlock_irqrestore(&dev_priv->rps_lock, flags);
657 queue_work(dev_priv->wq, &dev_priv->rps_work);
660 /* should clear PCH hotplug event before clear CPU irq */
661 I915_WRITE(SDEIIR, pch_iir);
662 I915_WRITE(GTIIR, gt_iir);
663 I915_WRITE(DEIIR, de_iir);
664 I915_WRITE(GEN6_PMIIR, pm_iir);
667 I915_WRITE(DEIER, de_ier);
674 * i915_error_work_func - do process context error handling work
677 * Fire an error uevent so userspace can see that a hang or error
680 static void i915_error_work_func(struct work_struct *work)
682 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
684 struct drm_device *dev = dev_priv->dev;
685 char *error_event[] = { "ERROR=1", NULL };
686 char *reset_event[] = { "RESET=1", NULL };
687 char *reset_done_event[] = { "ERROR=0", NULL };
689 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
691 if (atomic_read(&dev_priv->mm.wedged)) {
692 DRM_DEBUG_DRIVER("resetting chip\n");
693 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event);
694 if (!i915_reset(dev, GRDOM_RENDER)) {
695 atomic_set(&dev_priv->mm.wedged, 0);
696 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event);
698 complete_all(&dev_priv->error_completion);
702 #ifdef CONFIG_DEBUG_FS
703 static struct drm_i915_error_object *
704 i915_error_object_create(struct drm_i915_private *dev_priv,
705 struct drm_i915_gem_object *src)
707 struct drm_i915_error_object *dst;
708 int page, page_count;
711 if (src == NULL || src->pages == NULL)
714 page_count = src->base.size / PAGE_SIZE;
716 dst = kmalloc(sizeof(*dst) + page_count * sizeof(u32 *), GFP_ATOMIC);
720 reloc_offset = src->gtt_offset;
721 for (page = 0; page < page_count; page++) {
725 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
729 local_irq_save(flags);
730 if (reloc_offset < dev_priv->mm.gtt_mappable_end) {
733 /* Simply ignore tiling or any overlapping fence.
734 * It's part of the error state, and this hopefully
735 * captures what the GPU read.
738 s = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
740 memcpy_fromio(d, s, PAGE_SIZE);
741 io_mapping_unmap_atomic(s);
745 drm_clflush_pages(&src->pages[page], 1);
747 s = kmap_atomic(src->pages[page]);
748 memcpy(d, s, PAGE_SIZE);
751 drm_clflush_pages(&src->pages[page], 1);
753 local_irq_restore(flags);
755 dst->pages[page] = d;
757 reloc_offset += PAGE_SIZE;
759 dst->page_count = page_count;
760 dst->gtt_offset = src->gtt_offset;
766 kfree(dst->pages[page]);
772 i915_error_object_free(struct drm_i915_error_object *obj)
779 for (page = 0; page < obj->page_count; page++)
780 kfree(obj->pages[page]);
786 i915_error_state_free(struct drm_device *dev,
787 struct drm_i915_error_state *error)
791 for (i = 0; i < ARRAY_SIZE(error->batchbuffer); i++)
792 i915_error_object_free(error->batchbuffer[i]);
794 for (i = 0; i < ARRAY_SIZE(error->ringbuffer); i++)
795 i915_error_object_free(error->ringbuffer[i]);
797 kfree(error->active_bo);
798 kfree(error->overlay);
802 static u32 capture_bo_list(struct drm_i915_error_buffer *err,
804 struct list_head *head)
806 struct drm_i915_gem_object *obj;
809 list_for_each_entry(obj, head, mm_list) {
810 err->size = obj->base.size;
811 err->name = obj->base.name;
812 err->seqno = obj->last_rendering_seqno;
813 err->gtt_offset = obj->gtt_offset;
814 err->read_domains = obj->base.read_domains;
815 err->write_domain = obj->base.write_domain;
816 err->fence_reg = obj->fence_reg;
818 if (obj->pin_count > 0)
820 if (obj->user_pin_count > 0)
822 err->tiling = obj->tiling_mode;
823 err->dirty = obj->dirty;
824 err->purgeable = obj->madv != I915_MADV_WILLNEED;
825 err->ring = obj->ring ? obj->ring->id : -1;
826 err->cache_level = obj->cache_level;
837 static void i915_gem_record_fences(struct drm_device *dev,
838 struct drm_i915_error_state *error)
840 struct drm_i915_private *dev_priv = dev->dev_private;
844 switch (INTEL_INFO(dev)->gen) {
847 for (i = 0; i < 16; i++)
848 error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
852 for (i = 0; i < 16; i++)
853 error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
856 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
857 for (i = 0; i < 8; i++)
858 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
860 for (i = 0; i < 8; i++)
861 error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
867 static struct drm_i915_error_object *
868 i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
869 struct intel_ring_buffer *ring)
871 struct drm_i915_gem_object *obj;
874 if (!ring->get_seqno)
877 seqno = ring->get_seqno(ring);
878 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
879 if (obj->ring != ring)
882 if (i915_seqno_passed(seqno, obj->last_rendering_seqno))
885 if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
888 /* We need to copy these to an anonymous buffer as the simplest
889 * method to avoid being overwritten by userspace.
891 return i915_error_object_create(dev_priv, obj);
897 static void i915_record_ring_state(struct drm_device *dev,
898 struct drm_i915_error_state *error,
899 struct intel_ring_buffer *ring)
901 struct drm_i915_private *dev_priv = dev->dev_private;
903 if (INTEL_INFO(dev)->gen >= 6) {
904 error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
905 error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
908 if (INTEL_INFO(dev)->gen >= 4) {
909 error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
910 error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
911 error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
912 error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
913 if (ring->id == RCS) {
914 error->instdone1 = I915_READ(INSTDONE1);
915 error->bbaddr = I915_READ64(BB_ADDR);
918 error->ipeir[ring->id] = I915_READ(IPEIR);
919 error->ipehr[ring->id] = I915_READ(IPEHR);
920 error->instdone[ring->id] = I915_READ(INSTDONE);
923 error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
924 error->seqno[ring->id] = ring->get_seqno(ring);
925 error->acthd[ring->id] = intel_ring_get_active_head(ring);
926 error->head[ring->id] = I915_READ_HEAD(ring);
927 error->tail[ring->id] = I915_READ_TAIL(ring);
931 * i915_capture_error_state - capture an error record for later analysis
934 * Should be called when an error is detected (either a hang or an error
935 * interrupt) to capture error state from the time of the error. Fills
936 * out a structure which becomes available in debugfs for user level tools
939 static void i915_capture_error_state(struct drm_device *dev)
941 struct drm_i915_private *dev_priv = dev->dev_private;
942 struct drm_i915_gem_object *obj;
943 struct drm_i915_error_state *error;
947 spin_lock_irqsave(&dev_priv->error_lock, flags);
948 error = dev_priv->first_error;
949 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
953 /* Account for pipe specific data like PIPE*STAT */
954 error = kzalloc(sizeof(*error), GFP_ATOMIC);
956 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
960 DRM_INFO("capturing error event; look for more information in /debug/dri/%d/i915_error_state\n",
961 dev->primary->index);
963 error->eir = I915_READ(EIR);
964 error->pgtbl_er = I915_READ(PGTBL_ER);
966 error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
968 if (INTEL_INFO(dev)->gen >= 6) {
969 error->error = I915_READ(ERROR_GEN6);
970 error->done_reg = I915_READ(DONE_REG);
973 i915_record_ring_state(dev, error, &dev_priv->ring[RCS]);
975 i915_record_ring_state(dev, error, &dev_priv->ring[BCS]);
977 i915_record_ring_state(dev, error, &dev_priv->ring[VCS]);
979 i915_gem_record_fences(dev, error);
981 /* Record the active batch and ring buffers */
982 for (i = 0; i < I915_NUM_RINGS; i++) {
983 error->batchbuffer[i] =
984 i915_error_first_batchbuffer(dev_priv,
987 error->ringbuffer[i] =
988 i915_error_object_create(dev_priv,
989 dev_priv->ring[i].obj);
992 /* Record buffers on the active and pinned lists. */
993 error->active_bo = NULL;
994 error->pinned_bo = NULL;
997 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
999 error->active_bo_count = i;
1000 list_for_each_entry(obj, &dev_priv->mm.pinned_list, mm_list)
1002 error->pinned_bo_count = i - error->active_bo_count;
1004 error->active_bo = NULL;
1005 error->pinned_bo = NULL;
1007 error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
1009 if (error->active_bo)
1011 error->active_bo + error->active_bo_count;
1014 if (error->active_bo)
1015 error->active_bo_count =
1016 capture_bo_list(error->active_bo,
1017 error->active_bo_count,
1018 &dev_priv->mm.active_list);
1020 if (error->pinned_bo)
1021 error->pinned_bo_count =
1022 capture_bo_list(error->pinned_bo,
1023 error->pinned_bo_count,
1024 &dev_priv->mm.pinned_list);
1026 do_gettimeofday(&error->time);
1028 error->overlay = intel_overlay_capture_error_state(dev);
1029 error->display = intel_display_capture_error_state(dev);
1031 spin_lock_irqsave(&dev_priv->error_lock, flags);
1032 if (dev_priv->first_error == NULL) {
1033 dev_priv->first_error = error;
1036 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1039 i915_error_state_free(dev, error);
1042 void i915_destroy_error_state(struct drm_device *dev)
1044 struct drm_i915_private *dev_priv = dev->dev_private;
1045 struct drm_i915_error_state *error;
1046 unsigned long flags;
1048 spin_lock_irqsave(&dev_priv->error_lock, flags);
1049 error = dev_priv->first_error;
1050 dev_priv->first_error = NULL;
1051 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1054 i915_error_state_free(dev, error);
1057 #define i915_capture_error_state(x)
1060 static void i915_report_and_clear_eir(struct drm_device *dev)
1062 struct drm_i915_private *dev_priv = dev->dev_private;
1063 u32 eir = I915_READ(EIR);
1069 printk(KERN_ERR "render error detected, EIR: 0x%08x\n",
1073 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
1074 u32 ipeir = I915_READ(IPEIR_I965);
1076 printk(KERN_ERR " IPEIR: 0x%08x\n",
1077 I915_READ(IPEIR_I965));
1078 printk(KERN_ERR " IPEHR: 0x%08x\n",
1079 I915_READ(IPEHR_I965));
1080 printk(KERN_ERR " INSTDONE: 0x%08x\n",
1081 I915_READ(INSTDONE_I965));
1082 printk(KERN_ERR " INSTPS: 0x%08x\n",
1084 printk(KERN_ERR " INSTDONE1: 0x%08x\n",
1085 I915_READ(INSTDONE1));
1086 printk(KERN_ERR " ACTHD: 0x%08x\n",
1087 I915_READ(ACTHD_I965));
1088 I915_WRITE(IPEIR_I965, ipeir);
1089 POSTING_READ(IPEIR_I965);
1091 if (eir & GM45_ERROR_PAGE_TABLE) {
1092 u32 pgtbl_err = I915_READ(PGTBL_ER);
1093 printk(KERN_ERR "page table error\n");
1094 printk(KERN_ERR " PGTBL_ER: 0x%08x\n",
1096 I915_WRITE(PGTBL_ER, pgtbl_err);
1097 POSTING_READ(PGTBL_ER);
1101 if (!IS_GEN2(dev)) {
1102 if (eir & I915_ERROR_PAGE_TABLE) {
1103 u32 pgtbl_err = I915_READ(PGTBL_ER);
1104 printk(KERN_ERR "page table error\n");
1105 printk(KERN_ERR " PGTBL_ER: 0x%08x\n",
1107 I915_WRITE(PGTBL_ER, pgtbl_err);
1108 POSTING_READ(PGTBL_ER);
1112 if (eir & I915_ERROR_MEMORY_REFRESH) {
1113 printk(KERN_ERR "memory refresh error:\n");
1115 printk(KERN_ERR "pipe %c stat: 0x%08x\n",
1116 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
1117 /* pipestat has already been acked */
1119 if (eir & I915_ERROR_INSTRUCTION) {
1120 printk(KERN_ERR "instruction error\n");
1121 printk(KERN_ERR " INSTPM: 0x%08x\n",
1123 if (INTEL_INFO(dev)->gen < 4) {
1124 u32 ipeir = I915_READ(IPEIR);
1126 printk(KERN_ERR " IPEIR: 0x%08x\n",
1128 printk(KERN_ERR " IPEHR: 0x%08x\n",
1130 printk(KERN_ERR " INSTDONE: 0x%08x\n",
1131 I915_READ(INSTDONE));
1132 printk(KERN_ERR " ACTHD: 0x%08x\n",
1134 I915_WRITE(IPEIR, ipeir);
1135 POSTING_READ(IPEIR);
1137 u32 ipeir = I915_READ(IPEIR_I965);
1139 printk(KERN_ERR " IPEIR: 0x%08x\n",
1140 I915_READ(IPEIR_I965));
1141 printk(KERN_ERR " IPEHR: 0x%08x\n",
1142 I915_READ(IPEHR_I965));
1143 printk(KERN_ERR " INSTDONE: 0x%08x\n",
1144 I915_READ(INSTDONE_I965));
1145 printk(KERN_ERR " INSTPS: 0x%08x\n",
1147 printk(KERN_ERR " INSTDONE1: 0x%08x\n",
1148 I915_READ(INSTDONE1));
1149 printk(KERN_ERR " ACTHD: 0x%08x\n",
1150 I915_READ(ACTHD_I965));
1151 I915_WRITE(IPEIR_I965, ipeir);
1152 POSTING_READ(IPEIR_I965);
1156 I915_WRITE(EIR, eir);
1158 eir = I915_READ(EIR);
1161 * some errors might have become stuck,
1164 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
1165 I915_WRITE(EMR, I915_READ(EMR) | eir);
1166 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
1171 * i915_handle_error - handle an error interrupt
1174 * Do some basic checking of regsiter state at error interrupt time and
1175 * dump it to the syslog. Also call i915_capture_error_state() to make
1176 * sure we get a record and make it available in debugfs. Fire a uevent
1177 * so userspace knows something bad happened (should trigger collection
1178 * of a ring dump etc.).
1180 void i915_handle_error(struct drm_device *dev, bool wedged)
1182 struct drm_i915_private *dev_priv = dev->dev_private;
1184 i915_capture_error_state(dev);
1185 i915_report_and_clear_eir(dev);
1188 INIT_COMPLETION(dev_priv->error_completion);
1189 atomic_set(&dev_priv->mm.wedged, 1);
1192 * Wakeup waiting processes so they don't hang
1194 wake_up_all(&dev_priv->ring[RCS].irq_queue);
1196 wake_up_all(&dev_priv->ring[VCS].irq_queue);
1198 wake_up_all(&dev_priv->ring[BCS].irq_queue);
1201 queue_work(dev_priv->wq, &dev_priv->error_work);
1204 static void i915_pageflip_stall_check(struct drm_device *dev, int pipe)
1206 drm_i915_private_t *dev_priv = dev->dev_private;
1207 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1208 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1209 struct drm_i915_gem_object *obj;
1210 struct intel_unpin_work *work;
1211 unsigned long flags;
1212 bool stall_detected;
1214 /* Ignore early vblank irqs */
1215 if (intel_crtc == NULL)
1218 spin_lock_irqsave(&dev->event_lock, flags);
1219 work = intel_crtc->unpin_work;
1221 if (work == NULL || work->pending || !work->enable_stall_check) {
1222 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
1223 spin_unlock_irqrestore(&dev->event_lock, flags);
1227 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
1228 obj = work->pending_flip_obj;
1229 if (INTEL_INFO(dev)->gen >= 4) {
1230 int dspsurf = DSPSURF(intel_crtc->plane);
1231 stall_detected = I915_READ(dspsurf) == obj->gtt_offset;
1233 int dspaddr = DSPADDR(intel_crtc->plane);
1234 stall_detected = I915_READ(dspaddr) == (obj->gtt_offset +
1235 crtc->y * crtc->fb->pitches[0] +
1236 crtc->x * crtc->fb->bits_per_pixel/8);
1239 spin_unlock_irqrestore(&dev->event_lock, flags);
1241 if (stall_detected) {
1242 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
1243 intel_prepare_page_flip(dev, intel_crtc->plane);
1247 static irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
1249 struct drm_device *dev = (struct drm_device *) arg;
1250 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1251 struct drm_i915_master_private *master_priv;
1253 u32 pipe_stats[I915_MAX_PIPES];
1256 unsigned long irqflags;
1258 int ret = IRQ_NONE, pipe;
1259 bool blc_event = false;
1261 atomic_inc(&dev_priv->irq_received);
1263 iir = I915_READ(IIR);
1265 if (INTEL_INFO(dev)->gen >= 4)
1266 vblank_status = PIPE_START_VBLANK_INTERRUPT_STATUS;
1268 vblank_status = PIPE_VBLANK_INTERRUPT_STATUS;
1271 irq_received = iir != 0;
1273 /* Can't rely on pipestat interrupt bit in iir as it might
1274 * have been cleared after the pipestat interrupt was received.
1275 * It doesn't set the bit in iir again, but it still produces
1276 * interrupts (for non-MSI).
1278 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1279 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
1280 i915_handle_error(dev, false);
1282 for_each_pipe(pipe) {
1283 int reg = PIPESTAT(pipe);
1284 pipe_stats[pipe] = I915_READ(reg);
1287 * Clear the PIPE*STAT regs before the IIR
1289 if (pipe_stats[pipe] & 0x8000ffff) {
1290 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1291 DRM_DEBUG_DRIVER("pipe %c underrun\n",
1293 I915_WRITE(reg, pipe_stats[pipe]);
1297 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1304 /* Consume port. Then clear IIR or we'll miss events */
1305 if ((I915_HAS_HOTPLUG(dev)) &&
1306 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
1307 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
1309 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
1311 if (hotplug_status & dev_priv->hotplug_supported_mask)
1312 queue_work(dev_priv->wq,
1313 &dev_priv->hotplug_work);
1315 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
1316 I915_READ(PORT_HOTPLUG_STAT);
1319 I915_WRITE(IIR, iir);
1320 new_iir = I915_READ(IIR); /* Flush posted writes */
1322 if (dev->primary->master) {
1323 master_priv = dev->primary->master->driver_priv;
1324 if (master_priv->sarea_priv)
1325 master_priv->sarea_priv->last_dispatch =
1326 READ_BREADCRUMB(dev_priv);
1329 if (iir & I915_USER_INTERRUPT)
1330 notify_ring(dev, &dev_priv->ring[RCS]);
1331 if (iir & I915_BSD_USER_INTERRUPT)
1332 notify_ring(dev, &dev_priv->ring[VCS]);
1334 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) {
1335 intel_prepare_page_flip(dev, 0);
1336 if (dev_priv->flip_pending_is_done)
1337 intel_finish_page_flip_plane(dev, 0);
1340 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) {
1341 intel_prepare_page_flip(dev, 1);
1342 if (dev_priv->flip_pending_is_done)
1343 intel_finish_page_flip_plane(dev, 1);
1346 for_each_pipe(pipe) {
1347 if (pipe_stats[pipe] & vblank_status &&
1348 drm_handle_vblank(dev, pipe)) {
1350 if (!dev_priv->flip_pending_is_done) {
1351 i915_pageflip_stall_check(dev, pipe);
1352 intel_finish_page_flip(dev, pipe);
1356 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
1361 if (blc_event || (iir & I915_ASLE_INTERRUPT))
1362 intel_opregion_asle_intr(dev);
1364 /* With MSI, interrupts are only generated when iir
1365 * transitions from zero to nonzero. If another bit got
1366 * set while we were handling the existing iir bits, then
1367 * we would never get another interrupt.
1369 * This is fine on non-MSI as well, as if we hit this path
1370 * we avoid exiting the interrupt handler only to generate
1373 * Note that for MSI this could cause a stray interrupt report
1374 * if an interrupt landed in the time between writing IIR and
1375 * the posting read. This should be rare enough to never
1376 * trigger the 99% of 100,000 interrupts test for disabling
1385 static int i915_emit_irq(struct drm_device * dev)
1387 drm_i915_private_t *dev_priv = dev->dev_private;
1388 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
1390 i915_kernel_lost_context(dev);
1392 DRM_DEBUG_DRIVER("\n");
1394 dev_priv->counter++;
1395 if (dev_priv->counter > 0x7FFFFFFFUL)
1396 dev_priv->counter = 1;
1397 if (master_priv->sarea_priv)
1398 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
1400 if (BEGIN_LP_RING(4) == 0) {
1401 OUT_RING(MI_STORE_DWORD_INDEX);
1402 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
1403 OUT_RING(dev_priv->counter);
1404 OUT_RING(MI_USER_INTERRUPT);
1408 return dev_priv->counter;
1411 static int i915_wait_irq(struct drm_device * dev, int irq_nr)
1413 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1414 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
1416 struct intel_ring_buffer *ring = LP_RING(dev_priv);
1418 DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr,
1419 READ_BREADCRUMB(dev_priv));
1421 if (READ_BREADCRUMB(dev_priv) >= irq_nr) {
1422 if (master_priv->sarea_priv)
1423 master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
1427 if (master_priv->sarea_priv)
1428 master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
1430 if (ring->irq_get(ring)) {
1431 DRM_WAIT_ON(ret, ring->irq_queue, 3 * DRM_HZ,
1432 READ_BREADCRUMB(dev_priv) >= irq_nr);
1433 ring->irq_put(ring);
1434 } else if (wait_for(READ_BREADCRUMB(dev_priv) >= irq_nr, 3000))
1437 if (ret == -EBUSY) {
1438 DRM_ERROR("EBUSY -- rec: %d emitted: %d\n",
1439 READ_BREADCRUMB(dev_priv), (int)dev_priv->counter);
1445 /* Needs the lock as it touches the ring.
1447 int i915_irq_emit(struct drm_device *dev, void *data,
1448 struct drm_file *file_priv)
1450 drm_i915_private_t *dev_priv = dev->dev_private;
1451 drm_i915_irq_emit_t *emit = data;
1454 if (!dev_priv || !LP_RING(dev_priv)->virtual_start) {
1455 DRM_ERROR("called with no initialization\n");
1459 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
1461 mutex_lock(&dev->struct_mutex);
1462 result = i915_emit_irq(dev);
1463 mutex_unlock(&dev->struct_mutex);
1465 if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) {
1466 DRM_ERROR("copy_to_user\n");
1473 /* Doesn't need the hardware lock.
1475 int i915_irq_wait(struct drm_device *dev, void *data,
1476 struct drm_file *file_priv)
1478 drm_i915_private_t *dev_priv = dev->dev_private;
1479 drm_i915_irq_wait_t *irqwait = data;
1482 DRM_ERROR("called with no initialization\n");
1486 return i915_wait_irq(dev, irqwait->irq_seq);
1489 /* Called from drm generic code, passed 'crtc' which
1490 * we use as a pipe index
1492 static int i915_enable_vblank(struct drm_device *dev, int pipe)
1494 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1495 unsigned long irqflags;
1497 if (!i915_pipe_enabled(dev, pipe))
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);
1505 i915_enable_pipestat(dev_priv, pipe,
1506 PIPE_VBLANK_INTERRUPT_ENABLE);
1508 /* maintain vblank delivery even in deep C-states */
1509 if (dev_priv->info->gen == 3)
1510 I915_WRITE(INSTPM, INSTPM_AGPBUSY_DIS << 16);
1511 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1516 static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
1518 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1519 unsigned long irqflags;
1521 if (!i915_pipe_enabled(dev, pipe))
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);
1532 static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
1534 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1535 unsigned long irqflags;
1537 if (!i915_pipe_enabled(dev, pipe))
1540 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1541 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
1542 DE_PIPEA_VBLANK_IVB : DE_PIPEB_VBLANK_IVB);
1543 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1548 /* Called from drm generic code, passed 'crtc' which
1549 * we use as a pipe index
1551 static void i915_disable_vblank(struct drm_device *dev, int pipe)
1553 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1554 unsigned long irqflags;
1556 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1557 if (dev_priv->info->gen == 3)
1559 INSTPM_AGPBUSY_DIS << 16 | INSTPM_AGPBUSY_DIS);
1561 i915_disable_pipestat(dev_priv, pipe,
1562 PIPE_VBLANK_INTERRUPT_ENABLE |
1563 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1564 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1567 static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
1569 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1570 unsigned long irqflags;
1572 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1573 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
1574 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
1575 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1578 static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
1580 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1581 unsigned long irqflags;
1583 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1584 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
1585 DE_PIPEA_VBLANK_IVB : DE_PIPEB_VBLANK_IVB);
1586 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1589 /* Set the vblank monitor pipe
1591 int i915_vblank_pipe_set(struct drm_device *dev, void *data,
1592 struct drm_file *file_priv)
1594 drm_i915_private_t *dev_priv = dev->dev_private;
1597 DRM_ERROR("called with no initialization\n");
1604 int i915_vblank_pipe_get(struct drm_device *dev, void *data,
1605 struct drm_file *file_priv)
1607 drm_i915_private_t *dev_priv = dev->dev_private;
1608 drm_i915_vblank_pipe_t *pipe = data;
1611 DRM_ERROR("called with no initialization\n");
1615 pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
1621 * Schedule buffer swap at given vertical blank.
1623 int i915_vblank_swap(struct drm_device *dev, void *data,
1624 struct drm_file *file_priv)
1626 /* The delayed swap mechanism was fundamentally racy, and has been
1627 * removed. The model was that the client requested a delayed flip/swap
1628 * from the kernel, then waited for vblank before continuing to perform
1629 * rendering. The problem was that the kernel might wake the client
1630 * up before it dispatched the vblank swap (since the lock has to be
1631 * held while touching the ringbuffer), in which case the client would
1632 * clear and start the next frame before the swap occurred, and
1633 * flicker would occur in addition to likely missing the vblank.
1635 * In the absence of this ioctl, userland falls back to a correct path
1636 * of waiting for a vblank, then dispatching the swap on its own.
1637 * Context switching to userland and back is plenty fast enough for
1638 * meeting the requirements of vblank swapping.
1644 ring_last_seqno(struct intel_ring_buffer *ring)
1646 return list_entry(ring->request_list.prev,
1647 struct drm_i915_gem_request, list)->seqno;
1650 static bool i915_hangcheck_ring_idle(struct intel_ring_buffer *ring, bool *err)
1652 if (list_empty(&ring->request_list) ||
1653 i915_seqno_passed(ring->get_seqno(ring), ring_last_seqno(ring))) {
1654 /* Issue a wake-up to catch stuck h/w. */
1655 if (ring->waiting_seqno && waitqueue_active(&ring->irq_queue)) {
1656 DRM_ERROR("Hangcheck timer elapsed... %s idle [waiting on %d, at %d], missed IRQ?\n",
1658 ring->waiting_seqno,
1659 ring->get_seqno(ring));
1660 wake_up_all(&ring->irq_queue);
1668 static bool kick_ring(struct intel_ring_buffer *ring)
1670 struct drm_device *dev = ring->dev;
1671 struct drm_i915_private *dev_priv = dev->dev_private;
1672 u32 tmp = I915_READ_CTL(ring);
1673 if (tmp & RING_WAIT) {
1674 DRM_ERROR("Kicking stuck wait on %s\n",
1676 I915_WRITE_CTL(ring, tmp);
1683 * This is called when the chip hasn't reported back with completed
1684 * batchbuffers in a long time. The first time this is called we simply record
1685 * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses
1686 * again, we assume the chip is wedged and try to fix it.
1688 void i915_hangcheck_elapsed(unsigned long data)
1690 struct drm_device *dev = (struct drm_device *)data;
1691 drm_i915_private_t *dev_priv = dev->dev_private;
1692 uint32_t acthd, instdone, instdone1, acthd_bsd, acthd_blt;
1695 if (!i915_enable_hangcheck)
1698 /* If all work is done then ACTHD clearly hasn't advanced. */
1699 if (i915_hangcheck_ring_idle(&dev_priv->ring[RCS], &err) &&
1700 i915_hangcheck_ring_idle(&dev_priv->ring[VCS], &err) &&
1701 i915_hangcheck_ring_idle(&dev_priv->ring[BCS], &err)) {
1702 dev_priv->hangcheck_count = 0;
1708 if (INTEL_INFO(dev)->gen < 4) {
1709 instdone = I915_READ(INSTDONE);
1712 instdone = I915_READ(INSTDONE_I965);
1713 instdone1 = I915_READ(INSTDONE1);
1715 acthd = intel_ring_get_active_head(&dev_priv->ring[RCS]);
1716 acthd_bsd = HAS_BSD(dev) ?
1717 intel_ring_get_active_head(&dev_priv->ring[VCS]) : 0;
1718 acthd_blt = HAS_BLT(dev) ?
1719 intel_ring_get_active_head(&dev_priv->ring[BCS]) : 0;
1721 if (dev_priv->last_acthd == acthd &&
1722 dev_priv->last_acthd_bsd == acthd_bsd &&
1723 dev_priv->last_acthd_blt == acthd_blt &&
1724 dev_priv->last_instdone == instdone &&
1725 dev_priv->last_instdone1 == instdone1) {
1726 if (dev_priv->hangcheck_count++ > 1) {
1727 DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
1728 i915_handle_error(dev, true);
1730 if (!IS_GEN2(dev)) {
1731 /* Is the chip hanging on a WAIT_FOR_EVENT?
1732 * If so we can simply poke the RB_WAIT bit
1733 * and break the hang. This should work on
1734 * all but the second generation chipsets.
1736 if (kick_ring(&dev_priv->ring[RCS]))
1740 kick_ring(&dev_priv->ring[VCS]))
1744 kick_ring(&dev_priv->ring[BCS]))
1751 dev_priv->hangcheck_count = 0;
1753 dev_priv->last_acthd = acthd;
1754 dev_priv->last_acthd_bsd = acthd_bsd;
1755 dev_priv->last_acthd_blt = acthd_blt;
1756 dev_priv->last_instdone = instdone;
1757 dev_priv->last_instdone1 = instdone1;
1761 /* Reset timer case chip hangs without another request being added */
1762 mod_timer(&dev_priv->hangcheck_timer,
1763 jiffies + msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
1768 static void ironlake_irq_preinstall(struct drm_device *dev)
1770 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1772 atomic_set(&dev_priv->irq_received, 0);
1774 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
1775 INIT_WORK(&dev_priv->error_work, i915_error_work_func);
1776 if (IS_GEN6(dev) || IS_IVYBRIDGE(dev))
1777 INIT_WORK(&dev_priv->rps_work, gen6_pm_rps_work);
1779 I915_WRITE(HWSTAM, 0xeffe);
1780 if (IS_GEN6(dev) || IS_GEN7(dev)) {
1781 /* Workaround stalls observed on Sandy Bridge GPUs by
1782 * making the blitter command streamer generate a
1783 * write to the Hardware Status Page for
1784 * MI_USER_INTERRUPT. This appears to serialize the
1785 * previous seqno write out before the interrupt
1788 I915_WRITE(GEN6_BLITTER_HWSTAM, ~GEN6_BLITTER_USER_INTERRUPT);
1789 I915_WRITE(GEN6_BSD_HWSTAM, ~GEN6_BSD_USER_INTERRUPT);
1792 /* XXX hotplug from PCH */
1794 I915_WRITE(DEIMR, 0xffffffff);
1795 I915_WRITE(DEIER, 0x0);
1796 POSTING_READ(DEIER);
1799 I915_WRITE(GTIMR, 0xffffffff);
1800 I915_WRITE(GTIER, 0x0);
1801 POSTING_READ(GTIER);
1803 /* south display irq */
1804 I915_WRITE(SDEIMR, 0xffffffff);
1805 I915_WRITE(SDEIER, 0x0);
1806 POSTING_READ(SDEIER);
1810 * Enable digital hotplug on the PCH, and configure the DP short pulse
1811 * duration to 2ms (which is the minimum in the Display Port spec)
1813 * This register is the same on all known PCH chips.
1816 static void ironlake_enable_pch_hotplug(struct drm_device *dev)
1818 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1821 hotplug = I915_READ(PCH_PORT_HOTPLUG);
1822 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
1823 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
1824 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
1825 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
1826 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
1829 static int ironlake_irq_postinstall(struct drm_device *dev)
1831 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1832 /* enable kind of interrupts always enabled */
1833 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
1834 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE;
1838 DRM_INIT_WAITQUEUE(&dev_priv->ring[RCS].irq_queue);
1840 DRM_INIT_WAITQUEUE(&dev_priv->ring[VCS].irq_queue);
1842 DRM_INIT_WAITQUEUE(&dev_priv->ring[BCS].irq_queue);
1844 dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
1845 dev_priv->irq_mask = ~display_mask;
1847 /* should always can generate irq */
1848 I915_WRITE(DEIIR, I915_READ(DEIIR));
1849 I915_WRITE(DEIMR, dev_priv->irq_mask);
1850 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK);
1851 POSTING_READ(DEIER);
1853 dev_priv->gt_irq_mask = ~0;
1855 I915_WRITE(GTIIR, I915_READ(GTIIR));
1856 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1861 GT_GEN6_BSD_USER_INTERRUPT |
1862 GT_BLT_USER_INTERRUPT;
1867 GT_BSD_USER_INTERRUPT;
1868 I915_WRITE(GTIER, render_irqs);
1869 POSTING_READ(GTIER);
1871 if (HAS_PCH_CPT(dev)) {
1872 hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1873 SDE_PORTB_HOTPLUG_CPT |
1874 SDE_PORTC_HOTPLUG_CPT |
1875 SDE_PORTD_HOTPLUG_CPT);
1877 hotplug_mask = (SDE_CRT_HOTPLUG |
1884 dev_priv->pch_irq_mask = ~hotplug_mask;
1886 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1887 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
1888 I915_WRITE(SDEIER, hotplug_mask);
1889 POSTING_READ(SDEIER);
1891 ironlake_enable_pch_hotplug(dev);
1893 if (IS_IRONLAKE_M(dev)) {
1894 /* Clear & enable PCU event interrupts */
1895 I915_WRITE(DEIIR, DE_PCU_EVENT);
1896 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
1897 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
1903 static int ivybridge_irq_postinstall(struct drm_device *dev)
1905 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1906 /* enable kind of interrupts always enabled */
1907 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
1908 DE_PCH_EVENT_IVB | DE_PLANEA_FLIP_DONE_IVB |
1909 DE_PLANEB_FLIP_DONE_IVB;
1913 DRM_INIT_WAITQUEUE(&dev_priv->ring[RCS].irq_queue);
1915 DRM_INIT_WAITQUEUE(&dev_priv->ring[VCS].irq_queue);
1917 DRM_INIT_WAITQUEUE(&dev_priv->ring[BCS].irq_queue);
1919 dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
1920 dev_priv->irq_mask = ~display_mask;
1922 /* should always can generate irq */
1923 I915_WRITE(DEIIR, I915_READ(DEIIR));
1924 I915_WRITE(DEIMR, dev_priv->irq_mask);
1925 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK_IVB |
1926 DE_PIPEB_VBLANK_IVB);
1927 POSTING_READ(DEIER);
1929 dev_priv->gt_irq_mask = ~0;
1931 I915_WRITE(GTIIR, I915_READ(GTIIR));
1932 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1934 render_irqs = GT_USER_INTERRUPT | GT_GEN6_BSD_USER_INTERRUPT |
1935 GT_BLT_USER_INTERRUPT;
1936 I915_WRITE(GTIER, render_irqs);
1937 POSTING_READ(GTIER);
1939 hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1940 SDE_PORTB_HOTPLUG_CPT |
1941 SDE_PORTC_HOTPLUG_CPT |
1942 SDE_PORTD_HOTPLUG_CPT);
1943 dev_priv->pch_irq_mask = ~hotplug_mask;
1945 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1946 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
1947 I915_WRITE(SDEIER, hotplug_mask);
1948 POSTING_READ(SDEIER);
1950 ironlake_enable_pch_hotplug(dev);
1955 static void i915_driver_irq_preinstall(struct drm_device * dev)
1957 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1960 atomic_set(&dev_priv->irq_received, 0);
1962 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
1963 INIT_WORK(&dev_priv->error_work, i915_error_work_func);
1965 if (I915_HAS_HOTPLUG(dev)) {
1966 I915_WRITE(PORT_HOTPLUG_EN, 0);
1967 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
1970 I915_WRITE(HWSTAM, 0xeffe);
1972 I915_WRITE(PIPESTAT(pipe), 0);
1973 I915_WRITE(IMR, 0xffffffff);
1974 I915_WRITE(IER, 0x0);
1979 * Must be called after intel_modeset_init or hotplug interrupts won't be
1980 * enabled correctly.
1982 static int i915_driver_irq_postinstall(struct drm_device *dev)
1984 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1985 u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR;
1988 dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
1990 /* Unmask the interrupts that we always want on. */
1991 dev_priv->irq_mask = ~I915_INTERRUPT_ENABLE_FIX;
1993 dev_priv->pipestat[0] = 0;
1994 dev_priv->pipestat[1] = 0;
1996 if (I915_HAS_HOTPLUG(dev)) {
1997 /* Enable in IER... */
1998 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
1999 /* and unmask in IMR */
2000 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
2004 * Enable some error detection, note the instruction error mask
2005 * bit is reserved, so we leave it masked.
2008 error_mask = ~(GM45_ERROR_PAGE_TABLE |
2009 GM45_ERROR_MEM_PRIV |
2010 GM45_ERROR_CP_PRIV |
2011 I915_ERROR_MEMORY_REFRESH);
2013 error_mask = ~(I915_ERROR_PAGE_TABLE |
2014 I915_ERROR_MEMORY_REFRESH);
2016 I915_WRITE(EMR, error_mask);
2018 I915_WRITE(IMR, dev_priv->irq_mask);
2019 I915_WRITE(IER, enable_mask);
2022 if (I915_HAS_HOTPLUG(dev)) {
2023 u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
2025 /* Note HDMI and DP share bits */
2026 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2027 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2028 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2029 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2030 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2031 hotplug_en |= HDMID_HOTPLUG_INT_EN;
2032 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
2033 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2034 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
2035 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2036 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2037 hotplug_en |= CRT_HOTPLUG_INT_EN;
2039 /* Programming the CRT detection parameters tends
2040 to generate a spurious hotplug event about three
2041 seconds later. So just do it once.
2044 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
2045 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2048 /* Ignore TV since it's buggy */
2050 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2053 intel_opregion_enable_asle(dev);
2058 static void ironlake_irq_uninstall(struct drm_device *dev)
2060 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2065 dev_priv->vblank_pipe = 0;
2067 I915_WRITE(HWSTAM, 0xffffffff);
2069 I915_WRITE(DEIMR, 0xffffffff);
2070 I915_WRITE(DEIER, 0x0);
2071 I915_WRITE(DEIIR, I915_READ(DEIIR));
2073 I915_WRITE(GTIMR, 0xffffffff);
2074 I915_WRITE(GTIER, 0x0);
2075 I915_WRITE(GTIIR, I915_READ(GTIIR));
2077 I915_WRITE(SDEIMR, 0xffffffff);
2078 I915_WRITE(SDEIER, 0x0);
2079 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2082 static void i915_driver_irq_uninstall(struct drm_device * dev)
2084 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2090 dev_priv->vblank_pipe = 0;
2092 if (I915_HAS_HOTPLUG(dev)) {
2093 I915_WRITE(PORT_HOTPLUG_EN, 0);
2094 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2097 I915_WRITE(HWSTAM, 0xffffffff);
2099 I915_WRITE(PIPESTAT(pipe), 0);
2100 I915_WRITE(IMR, 0xffffffff);
2101 I915_WRITE(IER, 0x0);
2104 I915_WRITE(PIPESTAT(pipe),
2105 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
2106 I915_WRITE(IIR, I915_READ(IIR));
2109 void intel_irq_init(struct drm_device *dev)
2111 dev->driver->get_vblank_counter = i915_get_vblank_counter;
2112 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
2113 if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev) || IS_IVYBRIDGE(dev)) {
2114 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
2115 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
2118 if (drm_core_check_feature(dev, DRIVER_MODESET))
2119 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
2121 dev->driver->get_vblank_timestamp = NULL;
2122 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
2124 if (IS_IVYBRIDGE(dev)) {
2125 /* Share pre & uninstall handlers with ILK/SNB */
2126 dev->driver->irq_handler = ivybridge_irq_handler;
2127 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2128 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
2129 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2130 dev->driver->enable_vblank = ivybridge_enable_vblank;
2131 dev->driver->disable_vblank = ivybridge_disable_vblank;
2132 } else if (HAS_PCH_SPLIT(dev)) {
2133 dev->driver->irq_handler = ironlake_irq_handler;
2134 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2135 dev->driver->irq_postinstall = ironlake_irq_postinstall;
2136 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2137 dev->driver->enable_vblank = ironlake_enable_vblank;
2138 dev->driver->disable_vblank = ironlake_disable_vblank;
2140 dev->driver->irq_preinstall = i915_driver_irq_preinstall;
2141 dev->driver->irq_postinstall = i915_driver_irq_postinstall;
2142 dev->driver->irq_uninstall = i915_driver_irq_uninstall;
2143 dev->driver->irq_handler = i915_driver_irq_handler;
2144 dev->driver->enable_vblank = i915_enable_vblank;
2145 dev->driver->disable_vblank = i915_disable_vblank;