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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/sysrq.h>
32 #include <linux/slab.h>
34 #include <drm/i915_drm.h>
36 #include "i915_trace.h"
37 #include "intel_drv.h"
39 static const u32 hpd_ibx[] = {
40 [HPD_CRT] = SDE_CRT_HOTPLUG,
41 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
42 [HPD_PORT_B] = SDE_PORTB_HOTPLUG,
43 [HPD_PORT_C] = SDE_PORTC_HOTPLUG,
44 [HPD_PORT_D] = SDE_PORTD_HOTPLUG
47 static const u32 hpd_cpt[] = {
48 [HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
49 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
50 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
51 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
52 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
55 static const u32 hpd_mask_i915[] = {
56 [HPD_CRT] = CRT_HOTPLUG_INT_EN,
57 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
58 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
59 [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
60 [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
61 [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
64 static const u32 hpd_status_gen4[] = {
65 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
66 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
67 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
68 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
69 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
70 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
73 static const u32 hpd_status_i965[] = {
74 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
75 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I965,
76 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I965,
77 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
78 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
79 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
82 static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */
83 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
84 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
85 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
86 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
87 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
88 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
91 static void ibx_hpd_irq_setup(struct drm_device *dev);
92 static void i915_hpd_irq_setup(struct drm_device *dev);
94 /* For display hotplug interrupt */
96 ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
98 if ((dev_priv->irq_mask & mask) != 0) {
99 dev_priv->irq_mask &= ~mask;
100 I915_WRITE(DEIMR, dev_priv->irq_mask);
106 ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
108 if ((dev_priv->irq_mask & mask) != mask) {
109 dev_priv->irq_mask |= mask;
110 I915_WRITE(DEIMR, dev_priv->irq_mask);
115 static bool ivb_can_enable_err_int(struct drm_device *dev)
117 struct drm_i915_private *dev_priv = dev->dev_private;
118 struct intel_crtc *crtc;
121 for_each_pipe(pipe) {
122 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
124 if (crtc->cpu_fifo_underrun_disabled)
131 static bool cpt_can_enable_serr_int(struct drm_device *dev)
133 struct drm_i915_private *dev_priv = dev->dev_private;
135 struct intel_crtc *crtc;
137 for_each_pipe(pipe) {
138 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
140 if (crtc->pch_fifo_underrun_disabled)
147 static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev,
148 enum pipe pipe, bool enable)
150 struct drm_i915_private *dev_priv = dev->dev_private;
151 uint32_t bit = (pipe == PIPE_A) ? DE_PIPEA_FIFO_UNDERRUN :
152 DE_PIPEB_FIFO_UNDERRUN;
155 ironlake_enable_display_irq(dev_priv, bit);
157 ironlake_disable_display_irq(dev_priv, bit);
160 static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev,
163 struct drm_i915_private *dev_priv = dev->dev_private;
166 if (!ivb_can_enable_err_int(dev))
169 I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN_A |
170 ERR_INT_FIFO_UNDERRUN_B |
171 ERR_INT_FIFO_UNDERRUN_C);
173 ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
175 ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
179 static void ibx_set_fifo_underrun_reporting(struct intel_crtc *crtc,
182 struct drm_device *dev = crtc->base.dev;
183 struct drm_i915_private *dev_priv = dev->dev_private;
184 uint32_t bit = (crtc->pipe == PIPE_A) ? SDE_TRANSA_FIFO_UNDER :
185 SDE_TRANSB_FIFO_UNDER;
188 I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~bit);
190 I915_WRITE(SDEIMR, I915_READ(SDEIMR) | bit);
192 POSTING_READ(SDEIMR);
195 static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
196 enum transcoder pch_transcoder,
199 struct drm_i915_private *dev_priv = dev->dev_private;
202 if (!cpt_can_enable_serr_int(dev))
205 I915_WRITE(SERR_INT, SERR_INT_TRANS_A_FIFO_UNDERRUN |
206 SERR_INT_TRANS_B_FIFO_UNDERRUN |
207 SERR_INT_TRANS_C_FIFO_UNDERRUN);
209 I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~SDE_ERROR_CPT);
211 I915_WRITE(SDEIMR, I915_READ(SDEIMR) | SDE_ERROR_CPT);
214 POSTING_READ(SDEIMR);
218 * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
221 * @enable: true if we want to report FIFO underrun errors, false otherwise
223 * This function makes us disable or enable CPU fifo underruns for a specific
224 * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
225 * reporting for one pipe may also disable all the other CPU error interruts for
226 * the other pipes, due to the fact that there's just one interrupt mask/enable
227 * bit for all the pipes.
229 * Returns the previous state of underrun reporting.
231 bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
232 enum pipe pipe, bool enable)
234 struct drm_i915_private *dev_priv = dev->dev_private;
235 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
236 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
240 spin_lock_irqsave(&dev_priv->irq_lock, flags);
242 ret = !intel_crtc->cpu_fifo_underrun_disabled;
247 intel_crtc->cpu_fifo_underrun_disabled = !enable;
249 if (IS_GEN5(dev) || IS_GEN6(dev))
250 ironlake_set_fifo_underrun_reporting(dev, pipe, enable);
251 else if (IS_GEN7(dev))
252 ivybridge_set_fifo_underrun_reporting(dev, enable);
255 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
260 * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
262 * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
263 * @enable: true if we want to report FIFO underrun errors, false otherwise
265 * This function makes us disable or enable PCH fifo underruns for a specific
266 * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
267 * underrun reporting for one transcoder may also disable all the other PCH
268 * error interruts for the other transcoders, due to the fact that there's just
269 * one interrupt mask/enable bit for all the transcoders.
271 * Returns the previous state of underrun reporting.
273 bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
274 enum transcoder pch_transcoder,
277 struct drm_i915_private *dev_priv = dev->dev_private;
279 struct drm_crtc *crtc;
280 struct intel_crtc *intel_crtc;
284 if (HAS_PCH_LPT(dev)) {
287 struct drm_crtc *c = dev_priv->pipe_to_crtc_mapping[p];
288 if (intel_pipe_has_type(c, INTEL_OUTPUT_ANALOG)) {
294 DRM_ERROR("PCH FIFO underrun, but no CRTC using the PCH found\n");
298 crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder];
300 intel_crtc = to_intel_crtc(crtc);
302 spin_lock_irqsave(&dev_priv->irq_lock, flags);
304 ret = !intel_crtc->pch_fifo_underrun_disabled;
309 intel_crtc->pch_fifo_underrun_disabled = !enable;
311 if (HAS_PCH_IBX(dev))
312 ibx_set_fifo_underrun_reporting(intel_crtc, enable);
314 cpt_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
317 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
323 i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
325 u32 reg = PIPESTAT(pipe);
326 u32 pipestat = I915_READ(reg) & 0x7fff0000;
328 if ((pipestat & mask) == mask)
331 /* Enable the interrupt, clear any pending status */
332 pipestat |= mask | (mask >> 16);
333 I915_WRITE(reg, pipestat);
338 i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
340 u32 reg = PIPESTAT(pipe);
341 u32 pipestat = I915_READ(reg) & 0x7fff0000;
343 if ((pipestat & mask) == 0)
347 I915_WRITE(reg, pipestat);
352 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
354 static void i915_enable_asle_pipestat(struct drm_device *dev)
356 drm_i915_private_t *dev_priv = dev->dev_private;
357 unsigned long irqflags;
359 if (!dev_priv->opregion.asle || !IS_MOBILE(dev))
362 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
364 i915_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);
365 if (INTEL_INFO(dev)->gen >= 4)
366 i915_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
368 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
372 * i915_pipe_enabled - check if a pipe is enabled
374 * @pipe: pipe to check
376 * Reading certain registers when the pipe is disabled can hang the chip.
377 * Use this routine to make sure the PLL is running and the pipe is active
378 * before reading such registers if unsure.
381 i915_pipe_enabled(struct drm_device *dev, int pipe)
383 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
385 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
386 /* Locking is horribly broken here, but whatever. */
387 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
388 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
390 return intel_crtc->active;
392 return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
396 /* Called from drm generic code, passed a 'crtc', which
397 * we use as a pipe index
399 static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
401 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
402 unsigned long high_frame;
403 unsigned long low_frame;
404 u32 high1, high2, low;
406 if (!i915_pipe_enabled(dev, pipe)) {
407 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
408 "pipe %c\n", pipe_name(pipe));
412 high_frame = PIPEFRAME(pipe);
413 low_frame = PIPEFRAMEPIXEL(pipe);
416 * High & low register fields aren't synchronized, so make sure
417 * we get a low value that's stable across two reads of the high
421 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
422 low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
423 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
424 } while (high1 != high2);
426 high1 >>= PIPE_FRAME_HIGH_SHIFT;
427 low >>= PIPE_FRAME_LOW_SHIFT;
428 return (high1 << 8) | low;
431 static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
433 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
434 int reg = PIPE_FRMCOUNT_GM45(pipe);
436 if (!i915_pipe_enabled(dev, pipe)) {
437 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
438 "pipe %c\n", pipe_name(pipe));
442 return I915_READ(reg);
445 static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
446 int *vpos, int *hpos)
448 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
449 u32 vbl = 0, position = 0;
450 int vbl_start, vbl_end, htotal, vtotal;
453 enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
456 if (!i915_pipe_enabled(dev, pipe)) {
457 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
458 "pipe %c\n", pipe_name(pipe));
463 vtotal = 1 + ((I915_READ(VTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
465 if (INTEL_INFO(dev)->gen >= 4) {
466 /* No obvious pixelcount register. Only query vertical
467 * scanout position from Display scan line register.
469 position = I915_READ(PIPEDSL(pipe));
471 /* Decode into vertical scanout position. Don't have
472 * horizontal scanout position.
474 *vpos = position & 0x1fff;
477 /* Have access to pixelcount since start of frame.
478 * We can split this into vertical and horizontal
481 position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
483 htotal = 1 + ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
484 *vpos = position / htotal;
485 *hpos = position - (*vpos * htotal);
488 /* Query vblank area. */
489 vbl = I915_READ(VBLANK(cpu_transcoder));
491 /* Test position against vblank region. */
492 vbl_start = vbl & 0x1fff;
493 vbl_end = (vbl >> 16) & 0x1fff;
495 if ((*vpos < vbl_start) || (*vpos > vbl_end))
498 /* Inside "upper part" of vblank area? Apply corrective offset: */
499 if (in_vbl && (*vpos >= vbl_start))
500 *vpos = *vpos - vtotal;
502 /* Readouts valid? */
504 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
508 ret |= DRM_SCANOUTPOS_INVBL;
513 static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
515 struct timeval *vblank_time,
518 struct drm_crtc *crtc;
520 if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) {
521 DRM_ERROR("Invalid crtc %d\n", pipe);
525 /* Get drm_crtc to timestamp: */
526 crtc = intel_get_crtc_for_pipe(dev, pipe);
528 DRM_ERROR("Invalid crtc %d\n", pipe);
532 if (!crtc->enabled) {
533 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
537 /* Helper routine in DRM core does all the work: */
538 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
543 static int intel_hpd_irq_event(struct drm_device *dev, struct drm_connector *connector)
545 enum drm_connector_status old_status;
547 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
548 old_status = connector->status;
550 connector->status = connector->funcs->detect(connector, false);
551 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
553 drm_get_connector_name(connector),
554 old_status, connector->status);
555 return (old_status != connector->status);
559 * Handle hotplug events outside the interrupt handler proper.
561 #define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
563 static void i915_hotplug_work_func(struct work_struct *work)
565 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
567 struct drm_device *dev = dev_priv->dev;
568 struct drm_mode_config *mode_config = &dev->mode_config;
569 struct intel_connector *intel_connector;
570 struct intel_encoder *intel_encoder;
571 struct drm_connector *connector;
572 unsigned long irqflags;
573 bool hpd_disabled = false;
574 bool changed = false;
577 /* HPD irq before everything is fully set up. */
578 if (!dev_priv->enable_hotplug_processing)
581 mutex_lock(&mode_config->mutex);
582 DRM_DEBUG_KMS("running encoder hotplug functions\n");
584 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
586 hpd_event_bits = dev_priv->hpd_event_bits;
587 dev_priv->hpd_event_bits = 0;
588 list_for_each_entry(connector, &mode_config->connector_list, head) {
589 intel_connector = to_intel_connector(connector);
590 intel_encoder = intel_connector->encoder;
591 if (intel_encoder->hpd_pin > HPD_NONE &&
592 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
593 connector->polled == DRM_CONNECTOR_POLL_HPD) {
594 DRM_INFO("HPD interrupt storm detected on connector %s: "
595 "switching from hotplug detection to polling\n",
596 drm_get_connector_name(connector));
597 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED;
598 connector->polled = DRM_CONNECTOR_POLL_CONNECT
599 | DRM_CONNECTOR_POLL_DISCONNECT;
602 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
603 DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
604 drm_get_connector_name(connector), intel_encoder->hpd_pin);
607 /* if there were no outputs to poll, poll was disabled,
608 * therefore make sure it's enabled when disabling HPD on
611 drm_kms_helper_poll_enable(dev);
612 mod_timer(&dev_priv->hotplug_reenable_timer,
613 jiffies + msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY));
616 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
618 list_for_each_entry(connector, &mode_config->connector_list, head) {
619 intel_connector = to_intel_connector(connector);
620 intel_encoder = intel_connector->encoder;
621 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
622 if (intel_encoder->hot_plug)
623 intel_encoder->hot_plug(intel_encoder);
624 if (intel_hpd_irq_event(dev, connector))
628 mutex_unlock(&mode_config->mutex);
631 drm_kms_helper_hotplug_event(dev);
634 static void ironlake_handle_rps_change(struct drm_device *dev)
636 drm_i915_private_t *dev_priv = dev->dev_private;
637 u32 busy_up, busy_down, max_avg, min_avg;
641 spin_lock_irqsave(&mchdev_lock, flags);
643 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
645 new_delay = dev_priv->ips.cur_delay;
647 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
648 busy_up = I915_READ(RCPREVBSYTUPAVG);
649 busy_down = I915_READ(RCPREVBSYTDNAVG);
650 max_avg = I915_READ(RCBMAXAVG);
651 min_avg = I915_READ(RCBMINAVG);
653 /* Handle RCS change request from hw */
654 if (busy_up > max_avg) {
655 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
656 new_delay = dev_priv->ips.cur_delay - 1;
657 if (new_delay < dev_priv->ips.max_delay)
658 new_delay = dev_priv->ips.max_delay;
659 } else if (busy_down < min_avg) {
660 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
661 new_delay = dev_priv->ips.cur_delay + 1;
662 if (new_delay > dev_priv->ips.min_delay)
663 new_delay = dev_priv->ips.min_delay;
666 if (ironlake_set_drps(dev, new_delay))
667 dev_priv->ips.cur_delay = new_delay;
669 spin_unlock_irqrestore(&mchdev_lock, flags);
674 static void notify_ring(struct drm_device *dev,
675 struct intel_ring_buffer *ring)
677 struct drm_i915_private *dev_priv = dev->dev_private;
679 if (ring->obj == NULL)
682 trace_i915_gem_request_complete(ring, ring->get_seqno(ring, false));
684 wake_up_all(&ring->irq_queue);
685 if (i915_enable_hangcheck) {
686 mod_timer(&dev_priv->gpu_error.hangcheck_timer,
687 round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
691 static void gen6_pm_rps_work(struct work_struct *work)
693 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
698 spin_lock_irq(&dev_priv->rps.lock);
699 pm_iir = dev_priv->rps.pm_iir;
700 dev_priv->rps.pm_iir = 0;
701 pm_imr = I915_READ(GEN6_PMIMR);
702 /* Make sure not to corrupt PMIMR state used by ringbuffer code */
703 I915_WRITE(GEN6_PMIMR, pm_imr & ~GEN6_PM_RPS_EVENTS);
704 spin_unlock_irq(&dev_priv->rps.lock);
706 if ((pm_iir & GEN6_PM_RPS_EVENTS) == 0)
709 mutex_lock(&dev_priv->rps.hw_lock);
711 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD)
712 new_delay = dev_priv->rps.cur_delay + 1;
714 new_delay = dev_priv->rps.cur_delay - 1;
716 /* sysfs frequency interfaces may have snuck in while servicing the
719 if (!(new_delay > dev_priv->rps.max_delay ||
720 new_delay < dev_priv->rps.min_delay)) {
721 if (IS_VALLEYVIEW(dev_priv->dev))
722 valleyview_set_rps(dev_priv->dev, new_delay);
724 gen6_set_rps(dev_priv->dev, new_delay);
727 if (IS_VALLEYVIEW(dev_priv->dev)) {
729 * On VLV, when we enter RC6 we may not be at the minimum
730 * voltage level, so arm a timer to check. It should only
731 * fire when there's activity or once after we've entered
732 * RC6, and then won't be re-armed until the next RPS interrupt.
734 mod_delayed_work(dev_priv->wq, &dev_priv->rps.vlv_work,
735 msecs_to_jiffies(100));
738 mutex_unlock(&dev_priv->rps.hw_lock);
743 * ivybridge_parity_work - Workqueue called when a parity error interrupt
745 * @work: workqueue struct
747 * Doesn't actually do anything except notify userspace. As a consequence of
748 * this event, userspace should try to remap the bad rows since statistically
749 * it is likely the same row is more likely to go bad again.
751 static void ivybridge_parity_work(struct work_struct *work)
753 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
754 l3_parity.error_work);
755 u32 error_status, row, bank, subbank;
756 char *parity_event[5];
760 /* We must turn off DOP level clock gating to access the L3 registers.
761 * In order to prevent a get/put style interface, acquire struct mutex
762 * any time we access those registers.
764 mutex_lock(&dev_priv->dev->struct_mutex);
766 misccpctl = I915_READ(GEN7_MISCCPCTL);
767 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
768 POSTING_READ(GEN7_MISCCPCTL);
770 error_status = I915_READ(GEN7_L3CDERRST1);
771 row = GEN7_PARITY_ERROR_ROW(error_status);
772 bank = GEN7_PARITY_ERROR_BANK(error_status);
773 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
775 I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID |
776 GEN7_L3CDERRST1_ENABLE);
777 POSTING_READ(GEN7_L3CDERRST1);
779 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
781 spin_lock_irqsave(&dev_priv->irq_lock, flags);
782 dev_priv->gt_irq_mask &= ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
783 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
784 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
786 mutex_unlock(&dev_priv->dev->struct_mutex);
788 parity_event[0] = "L3_PARITY_ERROR=1";
789 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
790 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
791 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
792 parity_event[4] = NULL;
794 kobject_uevent_env(&dev_priv->dev->primary->kdev.kobj,
795 KOBJ_CHANGE, parity_event);
797 DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
800 kfree(parity_event[3]);
801 kfree(parity_event[2]);
802 kfree(parity_event[1]);
805 static void ivybridge_handle_parity_error(struct drm_device *dev)
807 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
810 if (!HAS_L3_GPU_CACHE(dev))
813 spin_lock_irqsave(&dev_priv->irq_lock, flags);
814 dev_priv->gt_irq_mask |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
815 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
816 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
818 queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
821 static void snb_gt_irq_handler(struct drm_device *dev,
822 struct drm_i915_private *dev_priv,
827 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
828 notify_ring(dev, &dev_priv->ring[RCS]);
829 if (gt_iir & GT_BSD_USER_INTERRUPT)
830 notify_ring(dev, &dev_priv->ring[VCS]);
831 if (gt_iir & GT_BLT_USER_INTERRUPT)
832 notify_ring(dev, &dev_priv->ring[BCS]);
834 if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
835 GT_BSD_CS_ERROR_INTERRUPT |
836 GT_RENDER_CS_MASTER_ERROR_INTERRUPT)) {
837 DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
838 i915_handle_error(dev, false);
841 if (gt_iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
842 ivybridge_handle_parity_error(dev);
845 /* Legacy way of handling PM interrupts */
846 static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
852 * IIR bits should never already be set because IMR should
853 * prevent an interrupt from being shown in IIR. The warning
854 * displays a case where we've unsafely cleared
855 * dev_priv->rps.pm_iir. Although missing an interrupt of the same
856 * type is not a problem, it displays a problem in the logic.
858 * The mask bit in IMR is cleared by dev_priv->rps.work.
861 spin_lock_irqsave(&dev_priv->rps.lock, flags);
862 dev_priv->rps.pm_iir |= pm_iir;
863 I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
864 POSTING_READ(GEN6_PMIMR);
865 spin_unlock_irqrestore(&dev_priv->rps.lock, flags);
867 queue_work(dev_priv->wq, &dev_priv->rps.work);
870 #define HPD_STORM_DETECT_PERIOD 1000
871 #define HPD_STORM_THRESHOLD 5
873 static inline bool hotplug_irq_storm_detect(struct drm_device *dev,
877 drm_i915_private_t *dev_priv = dev->dev_private;
878 unsigned long irqflags;
882 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
884 for (i = 1; i < HPD_NUM_PINS; i++) {
886 if (!(hpd[i] & hotplug_trigger) ||
887 dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
890 dev_priv->hpd_event_bits |= (1 << i);
891 if (!time_in_range(jiffies, dev_priv->hpd_stats[i].hpd_last_jiffies,
892 dev_priv->hpd_stats[i].hpd_last_jiffies
893 + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) {
894 dev_priv->hpd_stats[i].hpd_last_jiffies = jiffies;
895 dev_priv->hpd_stats[i].hpd_cnt = 0;
896 } else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) {
897 dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
898 dev_priv->hpd_event_bits &= ~(1 << i);
899 DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
902 dev_priv->hpd_stats[i].hpd_cnt++;
906 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
911 static void gmbus_irq_handler(struct drm_device *dev)
913 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
915 wake_up_all(&dev_priv->gmbus_wait_queue);
918 static void dp_aux_irq_handler(struct drm_device *dev)
920 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
922 wake_up_all(&dev_priv->gmbus_wait_queue);
925 /* Unlike gen6_queue_rps_work() from which this function is originally derived,
926 * we must be able to deal with other PM interrupts. This is complicated because
927 * of the way in which we use the masks to defer the RPS work (which for
928 * posterity is necessary because of forcewake).
930 static void hsw_pm_irq_handler(struct drm_i915_private *dev_priv,
935 spin_lock_irqsave(&dev_priv->rps.lock, flags);
936 dev_priv->rps.pm_iir |= pm_iir & GEN6_PM_RPS_EVENTS;
937 if (dev_priv->rps.pm_iir) {
938 I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
939 /* never want to mask useful interrupts. (also posting read) */
940 WARN_ON(I915_READ_NOTRACE(GEN6_PMIMR) & ~GEN6_PM_RPS_EVENTS);
941 /* TODO: if queue_work is slow, move it out of the spinlock */
942 queue_work(dev_priv->wq, &dev_priv->rps.work);
944 spin_unlock_irqrestore(&dev_priv->rps.lock, flags);
946 if (pm_iir & ~GEN6_PM_RPS_EVENTS) {
947 if (pm_iir & PM_VEBOX_USER_INTERRUPT)
948 notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
950 if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) {
951 DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir);
952 i915_handle_error(dev_priv->dev, false);
957 static irqreturn_t valleyview_irq_handler(int irq, void *arg)
959 struct drm_device *dev = (struct drm_device *) arg;
960 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
961 u32 iir, gt_iir, pm_iir;
962 irqreturn_t ret = IRQ_NONE;
963 unsigned long irqflags;
965 u32 pipe_stats[I915_MAX_PIPES];
967 atomic_inc(&dev_priv->irq_received);
970 iir = I915_READ(VLV_IIR);
971 gt_iir = I915_READ(GTIIR);
972 pm_iir = I915_READ(GEN6_PMIIR);
974 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
979 snb_gt_irq_handler(dev, dev_priv, gt_iir);
981 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
982 for_each_pipe(pipe) {
983 int reg = PIPESTAT(pipe);
984 pipe_stats[pipe] = I915_READ(reg);
987 * Clear the PIPE*STAT regs before the IIR
989 if (pipe_stats[pipe] & 0x8000ffff) {
990 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
991 DRM_DEBUG_DRIVER("pipe %c underrun\n",
993 I915_WRITE(reg, pipe_stats[pipe]);
996 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
998 for_each_pipe(pipe) {
999 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
1000 drm_handle_vblank(dev, pipe);
1002 if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
1003 intel_prepare_page_flip(dev, pipe);
1004 intel_finish_page_flip(dev, pipe);
1008 /* Consume port. Then clear IIR or we'll miss events */
1009 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
1010 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
1011 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
1013 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
1015 if (hotplug_trigger) {
1016 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_status_i915))
1017 i915_hpd_irq_setup(dev);
1018 queue_work(dev_priv->wq,
1019 &dev_priv->hotplug_work);
1021 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
1022 I915_READ(PORT_HOTPLUG_STAT);
1025 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
1026 gmbus_irq_handler(dev);
1028 if (pm_iir & GEN6_PM_RPS_EVENTS)
1029 gen6_queue_rps_work(dev_priv, pm_iir);
1031 I915_WRITE(GTIIR, gt_iir);
1032 I915_WRITE(GEN6_PMIIR, pm_iir);
1033 I915_WRITE(VLV_IIR, iir);
1040 static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
1042 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1044 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
1046 if (hotplug_trigger) {
1047 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_ibx))
1048 ibx_hpd_irq_setup(dev);
1049 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
1051 if (pch_iir & SDE_AUDIO_POWER_MASK) {
1052 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
1053 SDE_AUDIO_POWER_SHIFT);
1054 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
1058 if (pch_iir & SDE_AUX_MASK)
1059 dp_aux_irq_handler(dev);
1061 if (pch_iir & SDE_GMBUS)
1062 gmbus_irq_handler(dev);
1064 if (pch_iir & SDE_AUDIO_HDCP_MASK)
1065 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1067 if (pch_iir & SDE_AUDIO_TRANS_MASK)
1068 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1070 if (pch_iir & SDE_POISON)
1071 DRM_ERROR("PCH poison interrupt\n");
1073 if (pch_iir & SDE_FDI_MASK)
1075 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1077 I915_READ(FDI_RX_IIR(pipe)));
1079 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
1080 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1082 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
1083 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
1085 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
1086 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1088 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1090 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
1091 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1093 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1096 static void ivb_err_int_handler(struct drm_device *dev)
1098 struct drm_i915_private *dev_priv = dev->dev_private;
1099 u32 err_int = I915_READ(GEN7_ERR_INT);
1101 if (err_int & ERR_INT_POISON)
1102 DRM_ERROR("Poison interrupt\n");
1104 if (err_int & ERR_INT_FIFO_UNDERRUN_A)
1105 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
1106 DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
1108 if (err_int & ERR_INT_FIFO_UNDERRUN_B)
1109 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
1110 DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
1112 if (err_int & ERR_INT_FIFO_UNDERRUN_C)
1113 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_C, false))
1114 DRM_DEBUG_DRIVER("Pipe C FIFO underrun\n");
1116 I915_WRITE(GEN7_ERR_INT, err_int);
1119 static void cpt_serr_int_handler(struct drm_device *dev)
1121 struct drm_i915_private *dev_priv = dev->dev_private;
1122 u32 serr_int = I915_READ(SERR_INT);
1124 if (serr_int & SERR_INT_POISON)
1125 DRM_ERROR("PCH poison interrupt\n");
1127 if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
1128 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1130 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1132 if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
1133 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1135 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1137 if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
1138 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_C,
1140 DRM_DEBUG_DRIVER("PCH transcoder C FIFO underrun\n");
1142 I915_WRITE(SERR_INT, serr_int);
1145 static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
1147 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1149 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
1151 if (hotplug_trigger) {
1152 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_cpt))
1153 ibx_hpd_irq_setup(dev);
1154 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
1156 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
1157 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
1158 SDE_AUDIO_POWER_SHIFT_CPT);
1159 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
1163 if (pch_iir & SDE_AUX_MASK_CPT)
1164 dp_aux_irq_handler(dev);
1166 if (pch_iir & SDE_GMBUS_CPT)
1167 gmbus_irq_handler(dev);
1169 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
1170 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
1172 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
1173 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
1175 if (pch_iir & SDE_FDI_MASK_CPT)
1177 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1179 I915_READ(FDI_RX_IIR(pipe)));
1181 if (pch_iir & SDE_ERROR_CPT)
1182 cpt_serr_int_handler(dev);
1185 static irqreturn_t ivybridge_irq_handler(int irq, void *arg)
1187 struct drm_device *dev = (struct drm_device *) arg;
1188 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1189 u32 de_iir, gt_iir, de_ier, pm_iir, sde_ier = 0;
1190 irqreturn_t ret = IRQ_NONE;
1193 atomic_inc(&dev_priv->irq_received);
1195 /* We get interrupts on unclaimed registers, so check for this before we
1196 * do any I915_{READ,WRITE}. */
1197 if (IS_HASWELL(dev) &&
1198 (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
1199 DRM_ERROR("Unclaimed register before interrupt\n");
1200 I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
1203 /* disable master interrupt before clearing iir */
1204 de_ier = I915_READ(DEIER);
1205 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
1207 /* Disable south interrupts. We'll only write to SDEIIR once, so further
1208 * interrupts will will be stored on its back queue, and then we'll be
1209 * able to process them after we restore SDEIER (as soon as we restore
1210 * it, we'll get an interrupt if SDEIIR still has something to process
1211 * due to its back queue). */
1212 if (!HAS_PCH_NOP(dev)) {
1213 sde_ier = I915_READ(SDEIER);
1214 I915_WRITE(SDEIER, 0);
1215 POSTING_READ(SDEIER);
1218 /* On Haswell, also mask ERR_INT because we don't want to risk
1219 * generating "unclaimed register" interrupts from inside the interrupt
1221 if (IS_HASWELL(dev))
1222 ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
1224 gt_iir = I915_READ(GTIIR);
1226 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1227 I915_WRITE(GTIIR, gt_iir);
1231 de_iir = I915_READ(DEIIR);
1233 if (de_iir & DE_ERR_INT_IVB)
1234 ivb_err_int_handler(dev);
1236 if (de_iir & DE_AUX_CHANNEL_A_IVB)
1237 dp_aux_irq_handler(dev);
1239 if (de_iir & DE_GSE_IVB)
1240 intel_opregion_asle_intr(dev);
1242 for (i = 0; i < 3; i++) {
1243 if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
1244 drm_handle_vblank(dev, i);
1245 if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
1246 intel_prepare_page_flip(dev, i);
1247 intel_finish_page_flip_plane(dev, i);
1251 /* check event from PCH */
1252 if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
1253 u32 pch_iir = I915_READ(SDEIIR);
1255 cpt_irq_handler(dev, pch_iir);
1257 /* clear PCH hotplug event before clear CPU irq */
1258 I915_WRITE(SDEIIR, pch_iir);
1261 I915_WRITE(DEIIR, de_iir);
1265 pm_iir = I915_READ(GEN6_PMIIR);
1267 if (IS_HASWELL(dev))
1268 hsw_pm_irq_handler(dev_priv, pm_iir);
1269 else if (pm_iir & GEN6_PM_RPS_EVENTS)
1270 gen6_queue_rps_work(dev_priv, pm_iir);
1271 I915_WRITE(GEN6_PMIIR, pm_iir);
1275 if (IS_HASWELL(dev) && ivb_can_enable_err_int(dev))
1276 ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
1278 I915_WRITE(DEIER, de_ier);
1279 POSTING_READ(DEIER);
1280 if (!HAS_PCH_NOP(dev)) {
1281 I915_WRITE(SDEIER, sde_ier);
1282 POSTING_READ(SDEIER);
1288 static void ilk_gt_irq_handler(struct drm_device *dev,
1289 struct drm_i915_private *dev_priv,
1293 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1294 notify_ring(dev, &dev_priv->ring[RCS]);
1295 if (gt_iir & ILK_BSD_USER_INTERRUPT)
1296 notify_ring(dev, &dev_priv->ring[VCS]);
1299 static irqreturn_t ironlake_irq_handler(int irq, void *arg)
1301 struct drm_device *dev = (struct drm_device *) arg;
1302 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1304 u32 de_iir, gt_iir, de_ier, pm_iir, sde_ier;
1306 atomic_inc(&dev_priv->irq_received);
1308 /* disable master interrupt before clearing iir */
1309 de_ier = I915_READ(DEIER);
1310 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
1311 POSTING_READ(DEIER);
1313 /* Disable south interrupts. We'll only write to SDEIIR once, so further
1314 * interrupts will will be stored on its back queue, and then we'll be
1315 * able to process them after we restore SDEIER (as soon as we restore
1316 * it, we'll get an interrupt if SDEIIR still has something to process
1317 * due to its back queue). */
1318 sde_ier = I915_READ(SDEIER);
1319 I915_WRITE(SDEIER, 0);
1320 POSTING_READ(SDEIER);
1322 de_iir = I915_READ(DEIIR);
1323 gt_iir = I915_READ(GTIIR);
1324 pm_iir = I915_READ(GEN6_PMIIR);
1326 if (de_iir == 0 && gt_iir == 0 && (!IS_GEN6(dev) || pm_iir == 0))
1332 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
1334 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1336 if (de_iir & DE_AUX_CHANNEL_A)
1337 dp_aux_irq_handler(dev);
1339 if (de_iir & DE_GSE)
1340 intel_opregion_asle_intr(dev);
1342 if (de_iir & DE_PIPEA_VBLANK)
1343 drm_handle_vblank(dev, 0);
1345 if (de_iir & DE_PIPEB_VBLANK)
1346 drm_handle_vblank(dev, 1);
1348 if (de_iir & DE_POISON)
1349 DRM_ERROR("Poison interrupt\n");
1351 if (de_iir & DE_PIPEA_FIFO_UNDERRUN)
1352 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
1353 DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
1355 if (de_iir & DE_PIPEB_FIFO_UNDERRUN)
1356 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
1357 DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
1359 if (de_iir & DE_PLANEA_FLIP_DONE) {
1360 intel_prepare_page_flip(dev, 0);
1361 intel_finish_page_flip_plane(dev, 0);
1364 if (de_iir & DE_PLANEB_FLIP_DONE) {
1365 intel_prepare_page_flip(dev, 1);
1366 intel_finish_page_flip_plane(dev, 1);
1369 /* check event from PCH */
1370 if (de_iir & DE_PCH_EVENT) {
1371 u32 pch_iir = I915_READ(SDEIIR);
1373 if (HAS_PCH_CPT(dev))
1374 cpt_irq_handler(dev, pch_iir);
1376 ibx_irq_handler(dev, pch_iir);
1378 /* should clear PCH hotplug event before clear CPU irq */
1379 I915_WRITE(SDEIIR, pch_iir);
1382 if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
1383 ironlake_handle_rps_change(dev);
1385 if (IS_GEN6(dev) && pm_iir & GEN6_PM_RPS_EVENTS)
1386 gen6_queue_rps_work(dev_priv, pm_iir);
1388 I915_WRITE(GTIIR, gt_iir);
1389 I915_WRITE(DEIIR, de_iir);
1390 I915_WRITE(GEN6_PMIIR, pm_iir);
1393 I915_WRITE(DEIER, de_ier);
1394 POSTING_READ(DEIER);
1395 I915_WRITE(SDEIER, sde_ier);
1396 POSTING_READ(SDEIER);
1402 * i915_error_work_func - do process context error handling work
1403 * @work: work struct
1405 * Fire an error uevent so userspace can see that a hang or error
1408 static void i915_error_work_func(struct work_struct *work)
1410 struct i915_gpu_error *error = container_of(work, struct i915_gpu_error,
1412 drm_i915_private_t *dev_priv = container_of(error, drm_i915_private_t,
1414 struct drm_device *dev = dev_priv->dev;
1415 struct intel_ring_buffer *ring;
1416 char *error_event[] = { "ERROR=1", NULL };
1417 char *reset_event[] = { "RESET=1", NULL };
1418 char *reset_done_event[] = { "ERROR=0", NULL };
1421 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
1424 * Note that there's only one work item which does gpu resets, so we
1425 * need not worry about concurrent gpu resets potentially incrementing
1426 * error->reset_counter twice. We only need to take care of another
1427 * racing irq/hangcheck declaring the gpu dead for a second time. A
1428 * quick check for that is good enough: schedule_work ensures the
1429 * correct ordering between hang detection and this work item, and since
1430 * the reset in-progress bit is only ever set by code outside of this
1431 * work we don't need to worry about any other races.
1433 if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) {
1434 DRM_DEBUG_DRIVER("resetting chip\n");
1435 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE,
1438 ret = i915_reset(dev);
1442 * After all the gem state is reset, increment the reset
1443 * counter and wake up everyone waiting for the reset to
1446 * Since unlock operations are a one-sided barrier only,
1447 * we need to insert a barrier here to order any seqno
1449 * the counter increment.
1451 smp_mb__before_atomic_inc();
1452 atomic_inc(&dev_priv->gpu_error.reset_counter);
1454 kobject_uevent_env(&dev->primary->kdev.kobj,
1455 KOBJ_CHANGE, reset_done_event);
1457 atomic_set(&error->reset_counter, I915_WEDGED);
1460 for_each_ring(ring, dev_priv, i)
1461 wake_up_all(&ring->irq_queue);
1463 intel_display_handle_reset(dev);
1465 wake_up_all(&dev_priv->gpu_error.reset_queue);
1469 /* NB: please notice the memset */
1470 static void i915_get_extra_instdone(struct drm_device *dev,
1473 struct drm_i915_private *dev_priv = dev->dev_private;
1474 memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
1476 switch(INTEL_INFO(dev)->gen) {
1479 instdone[0] = I915_READ(INSTDONE);
1484 instdone[0] = I915_READ(INSTDONE_I965);
1485 instdone[1] = I915_READ(INSTDONE1);
1488 WARN_ONCE(1, "Unsupported platform\n");
1490 instdone[0] = I915_READ(GEN7_INSTDONE_1);
1491 instdone[1] = I915_READ(GEN7_SC_INSTDONE);
1492 instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
1493 instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
1498 #ifdef CONFIG_DEBUG_FS
1499 static struct drm_i915_error_object *
1500 i915_error_object_create_sized(struct drm_i915_private *dev_priv,
1501 struct drm_i915_gem_object *src,
1502 const int num_pages)
1504 struct drm_i915_error_object *dst;
1508 if (src == NULL || src->pages == NULL)
1511 dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
1515 reloc_offset = src->gtt_offset;
1516 for (i = 0; i < num_pages; i++) {
1517 unsigned long flags;
1520 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
1524 local_irq_save(flags);
1525 if (reloc_offset < dev_priv->gtt.mappable_end &&
1526 src->has_global_gtt_mapping) {
1529 /* Simply ignore tiling or any overlapping fence.
1530 * It's part of the error state, and this hopefully
1531 * captures what the GPU read.
1534 s = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
1536 memcpy_fromio(d, s, PAGE_SIZE);
1537 io_mapping_unmap_atomic(s);
1538 } else if (src->stolen) {
1539 unsigned long offset;
1541 offset = dev_priv->mm.stolen_base;
1542 offset += src->stolen->start;
1543 offset += i << PAGE_SHIFT;
1545 memcpy_fromio(d, (void __iomem *) offset, PAGE_SIZE);
1550 page = i915_gem_object_get_page(src, i);
1552 drm_clflush_pages(&page, 1);
1554 s = kmap_atomic(page);
1555 memcpy(d, s, PAGE_SIZE);
1558 drm_clflush_pages(&page, 1);
1560 local_irq_restore(flags);
1564 reloc_offset += PAGE_SIZE;
1566 dst->page_count = num_pages;
1567 dst->gtt_offset = src->gtt_offset;
1573 kfree(dst->pages[i]);
1577 #define i915_error_object_create(dev_priv, src) \
1578 i915_error_object_create_sized((dev_priv), (src), \
1579 (src)->base.size>>PAGE_SHIFT)
1582 i915_error_object_free(struct drm_i915_error_object *obj)
1589 for (page = 0; page < obj->page_count; page++)
1590 kfree(obj->pages[page]);
1596 i915_error_state_free(struct kref *error_ref)
1598 struct drm_i915_error_state *error = container_of(error_ref,
1599 typeof(*error), ref);
1602 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
1603 i915_error_object_free(error->ring[i].batchbuffer);
1604 i915_error_object_free(error->ring[i].ringbuffer);
1605 i915_error_object_free(error->ring[i].ctx);
1606 kfree(error->ring[i].requests);
1609 kfree(error->active_bo);
1610 kfree(error->overlay);
1611 kfree(error->display);
1614 static void capture_bo(struct drm_i915_error_buffer *err,
1615 struct drm_i915_gem_object *obj)
1617 err->size = obj->base.size;
1618 err->name = obj->base.name;
1619 err->rseqno = obj->last_read_seqno;
1620 err->wseqno = obj->last_write_seqno;
1621 err->gtt_offset = obj->gtt_offset;
1622 err->read_domains = obj->base.read_domains;
1623 err->write_domain = obj->base.write_domain;
1624 err->fence_reg = obj->fence_reg;
1626 if (obj->pin_count > 0)
1628 if (obj->user_pin_count > 0)
1630 err->tiling = obj->tiling_mode;
1631 err->dirty = obj->dirty;
1632 err->purgeable = obj->madv != I915_MADV_WILLNEED;
1633 err->ring = obj->ring ? obj->ring->id : -1;
1634 err->cache_level = obj->cache_level;
1637 static u32 capture_active_bo(struct drm_i915_error_buffer *err,
1638 int count, struct list_head *head)
1640 struct drm_i915_gem_object *obj;
1643 list_for_each_entry(obj, head, mm_list) {
1644 capture_bo(err++, obj);
1652 static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
1653 int count, struct list_head *head)
1655 struct drm_i915_gem_object *obj;
1658 list_for_each_entry(obj, head, global_list) {
1659 if (obj->pin_count == 0)
1662 capture_bo(err++, obj);
1670 static void i915_gem_record_fences(struct drm_device *dev,
1671 struct drm_i915_error_state *error)
1673 struct drm_i915_private *dev_priv = dev->dev_private;
1677 switch (INTEL_INFO(dev)->gen) {
1680 for (i = 0; i < dev_priv->num_fence_regs; i++)
1681 error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
1685 for (i = 0; i < 16; i++)
1686 error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
1689 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
1690 for (i = 0; i < 8; i++)
1691 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
1693 for (i = 0; i < 8; i++)
1694 error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
1702 static struct drm_i915_error_object *
1703 i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
1704 struct intel_ring_buffer *ring)
1706 struct drm_i915_gem_object *obj;
1709 if (!ring->get_seqno)
1712 if (HAS_BROKEN_CS_TLB(dev_priv->dev)) {
1713 u32 acthd = I915_READ(ACTHD);
1715 if (WARN_ON(ring->id != RCS))
1718 obj = ring->private;
1719 if (acthd >= obj->gtt_offset &&
1720 acthd < obj->gtt_offset + obj->base.size)
1721 return i915_error_object_create(dev_priv, obj);
1724 seqno = ring->get_seqno(ring, false);
1725 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
1726 if (obj->ring != ring)
1729 if (i915_seqno_passed(seqno, obj->last_read_seqno))
1732 if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
1735 /* We need to copy these to an anonymous buffer as the simplest
1736 * method to avoid being overwritten by userspace.
1738 return i915_error_object_create(dev_priv, obj);
1744 static void i915_record_ring_state(struct drm_device *dev,
1745 struct drm_i915_error_state *error,
1746 struct intel_ring_buffer *ring)
1748 struct drm_i915_private *dev_priv = dev->dev_private;
1750 if (INTEL_INFO(dev)->gen >= 6) {
1751 error->rc_psmi[ring->id] = I915_READ(ring->mmio_base + 0x50);
1752 error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
1753 error->semaphore_mboxes[ring->id][0]
1754 = I915_READ(RING_SYNC_0(ring->mmio_base));
1755 error->semaphore_mboxes[ring->id][1]
1756 = I915_READ(RING_SYNC_1(ring->mmio_base));
1757 error->semaphore_seqno[ring->id][0] = ring->sync_seqno[0];
1758 error->semaphore_seqno[ring->id][1] = ring->sync_seqno[1];
1761 if (INTEL_INFO(dev)->gen >= 4) {
1762 error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
1763 error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
1764 error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
1765 error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
1766 error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
1767 if (ring->id == RCS)
1768 error->bbaddr = I915_READ64(BB_ADDR);
1770 error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX);
1771 error->ipeir[ring->id] = I915_READ(IPEIR);
1772 error->ipehr[ring->id] = I915_READ(IPEHR);
1773 error->instdone[ring->id] = I915_READ(INSTDONE);
1776 error->waiting[ring->id] = waitqueue_active(&ring->irq_queue);
1777 error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
1778 error->seqno[ring->id] = ring->get_seqno(ring, false);
1779 error->acthd[ring->id] = intel_ring_get_active_head(ring);
1780 error->head[ring->id] = I915_READ_HEAD(ring);
1781 error->tail[ring->id] = I915_READ_TAIL(ring);
1782 error->ctl[ring->id] = I915_READ_CTL(ring);
1784 error->cpu_ring_head[ring->id] = ring->head;
1785 error->cpu_ring_tail[ring->id] = ring->tail;
1789 static void i915_gem_record_active_context(struct intel_ring_buffer *ring,
1790 struct drm_i915_error_state *error,
1791 struct drm_i915_error_ring *ering)
1793 struct drm_i915_private *dev_priv = ring->dev->dev_private;
1794 struct drm_i915_gem_object *obj;
1796 /* Currently render ring is the only HW context user */
1797 if (ring->id != RCS || !error->ccid)
1800 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
1801 if ((error->ccid & PAGE_MASK) == obj->gtt_offset) {
1802 ering->ctx = i915_error_object_create_sized(dev_priv,
1808 static void i915_gem_record_rings(struct drm_device *dev,
1809 struct drm_i915_error_state *error)
1811 struct drm_i915_private *dev_priv = dev->dev_private;
1812 struct intel_ring_buffer *ring;
1813 struct drm_i915_gem_request *request;
1816 for_each_ring(ring, dev_priv, i) {
1817 i915_record_ring_state(dev, error, ring);
1819 error->ring[i].batchbuffer =
1820 i915_error_first_batchbuffer(dev_priv, ring);
1822 error->ring[i].ringbuffer =
1823 i915_error_object_create(dev_priv, ring->obj);
1826 i915_gem_record_active_context(ring, error, &error->ring[i]);
1829 list_for_each_entry(request, &ring->request_list, list)
1832 error->ring[i].num_requests = count;
1833 error->ring[i].requests =
1834 kmalloc(count*sizeof(struct drm_i915_error_request),
1836 if (error->ring[i].requests == NULL) {
1837 error->ring[i].num_requests = 0;
1842 list_for_each_entry(request, &ring->request_list, list) {
1843 struct drm_i915_error_request *erq;
1845 erq = &error->ring[i].requests[count++];
1846 erq->seqno = request->seqno;
1847 erq->jiffies = request->emitted_jiffies;
1848 erq->tail = request->tail;
1854 * i915_capture_error_state - capture an error record for later analysis
1857 * Should be called when an error is detected (either a hang or an error
1858 * interrupt) to capture error state from the time of the error. Fills
1859 * out a structure which becomes available in debugfs for user level tools
1862 static void i915_capture_error_state(struct drm_device *dev)
1864 struct drm_i915_private *dev_priv = dev->dev_private;
1865 struct drm_i915_gem_object *obj;
1866 struct drm_i915_error_state *error;
1867 unsigned long flags;
1870 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1871 error = dev_priv->gpu_error.first_error;
1872 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1876 /* Account for pipe specific data like PIPE*STAT */
1877 error = kzalloc(sizeof(*error), GFP_ATOMIC);
1879 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
1883 DRM_INFO("capturing error event; look for more information in "
1884 "/sys/kernel/debug/dri/%d/i915_error_state\n",
1885 dev->primary->index);
1887 kref_init(&error->ref);
1888 error->eir = I915_READ(EIR);
1889 error->pgtbl_er = I915_READ(PGTBL_ER);
1890 if (HAS_HW_CONTEXTS(dev))
1891 error->ccid = I915_READ(CCID);
1893 if (HAS_PCH_SPLIT(dev))
1894 error->ier = I915_READ(DEIER) | I915_READ(GTIER);
1895 else if (IS_VALLEYVIEW(dev))
1896 error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
1897 else if (IS_GEN2(dev))
1898 error->ier = I915_READ16(IER);
1900 error->ier = I915_READ(IER);
1902 if (INTEL_INFO(dev)->gen >= 6)
1903 error->derrmr = I915_READ(DERRMR);
1905 if (IS_VALLEYVIEW(dev))
1906 error->forcewake = I915_READ(FORCEWAKE_VLV);
1907 else if (INTEL_INFO(dev)->gen >= 7)
1908 error->forcewake = I915_READ(FORCEWAKE_MT);
1909 else if (INTEL_INFO(dev)->gen == 6)
1910 error->forcewake = I915_READ(FORCEWAKE);
1912 if (!HAS_PCH_SPLIT(dev))
1914 error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
1916 if (INTEL_INFO(dev)->gen >= 6) {
1917 error->error = I915_READ(ERROR_GEN6);
1918 error->done_reg = I915_READ(DONE_REG);
1921 if (INTEL_INFO(dev)->gen == 7)
1922 error->err_int = I915_READ(GEN7_ERR_INT);
1924 i915_get_extra_instdone(dev, error->extra_instdone);
1926 i915_gem_record_fences(dev, error);
1927 i915_gem_record_rings(dev, error);
1929 /* Record buffers on the active and pinned lists. */
1930 error->active_bo = NULL;
1931 error->pinned_bo = NULL;
1934 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
1936 error->active_bo_count = i;
1937 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
1940 error->pinned_bo_count = i - error->active_bo_count;
1942 error->active_bo = NULL;
1943 error->pinned_bo = NULL;
1945 error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
1947 if (error->active_bo)
1949 error->active_bo + error->active_bo_count;
1952 if (error->active_bo)
1953 error->active_bo_count =
1954 capture_active_bo(error->active_bo,
1955 error->active_bo_count,
1956 &dev_priv->mm.active_list);
1958 if (error->pinned_bo)
1959 error->pinned_bo_count =
1960 capture_pinned_bo(error->pinned_bo,
1961 error->pinned_bo_count,
1962 &dev_priv->mm.bound_list);
1964 do_gettimeofday(&error->time);
1966 error->overlay = intel_overlay_capture_error_state(dev);
1967 error->display = intel_display_capture_error_state(dev);
1969 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1970 if (dev_priv->gpu_error.first_error == NULL) {
1971 dev_priv->gpu_error.first_error = error;
1974 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1977 i915_error_state_free(&error->ref);
1980 void i915_destroy_error_state(struct drm_device *dev)
1982 struct drm_i915_private *dev_priv = dev->dev_private;
1983 struct drm_i915_error_state *error;
1984 unsigned long flags;
1986 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1987 error = dev_priv->gpu_error.first_error;
1988 dev_priv->gpu_error.first_error = NULL;
1989 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1992 kref_put(&error->ref, i915_error_state_free);
1995 #define i915_capture_error_state(x)
1998 static void i915_report_and_clear_eir(struct drm_device *dev)
2000 struct drm_i915_private *dev_priv = dev->dev_private;
2001 uint32_t instdone[I915_NUM_INSTDONE_REG];
2002 u32 eir = I915_READ(EIR);
2008 pr_err("render error detected, EIR: 0x%08x\n", eir);
2010 i915_get_extra_instdone(dev, instdone);
2013 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
2014 u32 ipeir = I915_READ(IPEIR_I965);
2016 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2017 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2018 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2019 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2020 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2021 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2022 I915_WRITE(IPEIR_I965, ipeir);
2023 POSTING_READ(IPEIR_I965);
2025 if (eir & GM45_ERROR_PAGE_TABLE) {
2026 u32 pgtbl_err = I915_READ(PGTBL_ER);
2027 pr_err("page table error\n");
2028 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2029 I915_WRITE(PGTBL_ER, pgtbl_err);
2030 POSTING_READ(PGTBL_ER);
2034 if (!IS_GEN2(dev)) {
2035 if (eir & I915_ERROR_PAGE_TABLE) {
2036 u32 pgtbl_err = I915_READ(PGTBL_ER);
2037 pr_err("page table error\n");
2038 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2039 I915_WRITE(PGTBL_ER, pgtbl_err);
2040 POSTING_READ(PGTBL_ER);
2044 if (eir & I915_ERROR_MEMORY_REFRESH) {
2045 pr_err("memory refresh error:\n");
2047 pr_err("pipe %c stat: 0x%08x\n",
2048 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
2049 /* pipestat has already been acked */
2051 if (eir & I915_ERROR_INSTRUCTION) {
2052 pr_err("instruction error\n");
2053 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
2054 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2055 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2056 if (INTEL_INFO(dev)->gen < 4) {
2057 u32 ipeir = I915_READ(IPEIR);
2059 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
2060 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
2061 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
2062 I915_WRITE(IPEIR, ipeir);
2063 POSTING_READ(IPEIR);
2065 u32 ipeir = I915_READ(IPEIR_I965);
2067 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2068 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2069 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2070 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2071 I915_WRITE(IPEIR_I965, ipeir);
2072 POSTING_READ(IPEIR_I965);
2076 I915_WRITE(EIR, eir);
2078 eir = I915_READ(EIR);
2081 * some errors might have become stuck,
2084 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
2085 I915_WRITE(EMR, I915_READ(EMR) | eir);
2086 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2091 * i915_handle_error - handle an error interrupt
2094 * Do some basic checking of regsiter state at error interrupt time and
2095 * dump it to the syslog. Also call i915_capture_error_state() to make
2096 * sure we get a record and make it available in debugfs. Fire a uevent
2097 * so userspace knows something bad happened (should trigger collection
2098 * of a ring dump etc.).
2100 void i915_handle_error(struct drm_device *dev, bool wedged)
2102 struct drm_i915_private *dev_priv = dev->dev_private;
2103 struct intel_ring_buffer *ring;
2106 i915_capture_error_state(dev);
2107 i915_report_and_clear_eir(dev);
2110 atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG,
2111 &dev_priv->gpu_error.reset_counter);
2114 * Wakeup waiting processes so that the reset work item
2115 * doesn't deadlock trying to grab various locks.
2117 for_each_ring(ring, dev_priv, i)
2118 wake_up_all(&ring->irq_queue);
2121 queue_work(dev_priv->wq, &dev_priv->gpu_error.work);
2124 static void __always_unused i915_pageflip_stall_check(struct drm_device *dev, int pipe)
2126 drm_i915_private_t *dev_priv = dev->dev_private;
2127 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
2128 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2129 struct drm_i915_gem_object *obj;
2130 struct intel_unpin_work *work;
2131 unsigned long flags;
2132 bool stall_detected;
2134 /* Ignore early vblank irqs */
2135 if (intel_crtc == NULL)
2138 spin_lock_irqsave(&dev->event_lock, flags);
2139 work = intel_crtc->unpin_work;
2142 atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE ||
2143 !work->enable_stall_check) {
2144 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
2145 spin_unlock_irqrestore(&dev->event_lock, flags);
2149 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
2150 obj = work->pending_flip_obj;
2151 if (INTEL_INFO(dev)->gen >= 4) {
2152 int dspsurf = DSPSURF(intel_crtc->plane);
2153 stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
2156 int dspaddr = DSPADDR(intel_crtc->plane);
2157 stall_detected = I915_READ(dspaddr) == (obj->gtt_offset +
2158 crtc->y * crtc->fb->pitches[0] +
2159 crtc->x * crtc->fb->bits_per_pixel/8);
2162 spin_unlock_irqrestore(&dev->event_lock, flags);
2164 if (stall_detected) {
2165 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
2166 intel_prepare_page_flip(dev, intel_crtc->plane);
2170 /* Called from drm generic code, passed 'crtc' which
2171 * we use as a pipe index
2173 static int i915_enable_vblank(struct drm_device *dev, int pipe)
2175 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2176 unsigned long irqflags;
2178 if (!i915_pipe_enabled(dev, pipe))
2181 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2182 if (INTEL_INFO(dev)->gen >= 4)
2183 i915_enable_pipestat(dev_priv, pipe,
2184 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2186 i915_enable_pipestat(dev_priv, pipe,
2187 PIPE_VBLANK_INTERRUPT_ENABLE);
2189 /* maintain vblank delivery even in deep C-states */
2190 if (dev_priv->info->gen == 3)
2191 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
2192 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2197 static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
2199 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2200 unsigned long irqflags;
2202 if (!i915_pipe_enabled(dev, pipe))
2205 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2206 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
2207 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
2208 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2213 static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
2215 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2216 unsigned long irqflags;
2218 if (!i915_pipe_enabled(dev, pipe))
2221 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2222 ironlake_enable_display_irq(dev_priv,
2223 DE_PIPEA_VBLANK_IVB << (5 * pipe));
2224 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2229 static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
2231 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2232 unsigned long irqflags;
2235 if (!i915_pipe_enabled(dev, pipe))
2238 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2239 imr = I915_READ(VLV_IMR);
2241 imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
2243 imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2244 I915_WRITE(VLV_IMR, imr);
2245 i915_enable_pipestat(dev_priv, pipe,
2246 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2247 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2252 /* Called from drm generic code, passed 'crtc' which
2253 * we use as a pipe index
2255 static void i915_disable_vblank(struct drm_device *dev, int pipe)
2257 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2258 unsigned long irqflags;
2260 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2261 if (dev_priv->info->gen == 3)
2262 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
2264 i915_disable_pipestat(dev_priv, pipe,
2265 PIPE_VBLANK_INTERRUPT_ENABLE |
2266 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2267 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2270 static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
2272 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2273 unsigned long irqflags;
2275 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2276 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
2277 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
2278 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2281 static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
2283 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2284 unsigned long irqflags;
2286 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2287 ironlake_disable_display_irq(dev_priv,
2288 DE_PIPEA_VBLANK_IVB << (pipe * 5));
2289 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2292 static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
2294 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2295 unsigned long irqflags;
2298 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2299 i915_disable_pipestat(dev_priv, pipe,
2300 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2301 imr = I915_READ(VLV_IMR);
2303 imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
2305 imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2306 I915_WRITE(VLV_IMR, imr);
2307 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2311 ring_last_seqno(struct intel_ring_buffer *ring)
2313 return list_entry(ring->request_list.prev,
2314 struct drm_i915_gem_request, list)->seqno;
2317 static bool i915_hangcheck_ring_idle(struct intel_ring_buffer *ring,
2318 u32 ring_seqno, bool *err)
2320 if (list_empty(&ring->request_list) ||
2321 i915_seqno_passed(ring_seqno, ring_last_seqno(ring))) {
2322 /* Issue a wake-up to catch stuck h/w. */
2323 if (waitqueue_active(&ring->irq_queue)) {
2324 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
2326 wake_up_all(&ring->irq_queue);
2334 static bool semaphore_passed(struct intel_ring_buffer *ring)
2336 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2337 u32 acthd = intel_ring_get_active_head(ring) & HEAD_ADDR;
2338 struct intel_ring_buffer *signaller;
2339 u32 cmd, ipehr, acthd_min;
2341 ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
2342 if ((ipehr & ~(0x3 << 16)) !=
2343 (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE | MI_SEMAPHORE_REGISTER))
2346 /* ACTHD is likely pointing to the dword after the actual command,
2347 * so scan backwards until we find the MBOX.
2349 acthd_min = max((int)acthd - 3 * 4, 0);
2351 cmd = ioread32(ring->virtual_start + acthd);
2356 if (acthd < acthd_min)
2360 signaller = &dev_priv->ring[(ring->id + (((ipehr >> 17) & 1) + 1)) % 3];
2361 return i915_seqno_passed(signaller->get_seqno(signaller, false),
2362 ioread32(ring->virtual_start+acthd+4)+1);
2365 static bool kick_ring(struct intel_ring_buffer *ring)
2367 struct drm_device *dev = ring->dev;
2368 struct drm_i915_private *dev_priv = dev->dev_private;
2369 u32 tmp = I915_READ_CTL(ring);
2370 if (tmp & RING_WAIT) {
2371 DRM_ERROR("Kicking stuck wait on %s\n",
2373 I915_WRITE_CTL(ring, tmp);
2377 if (INTEL_INFO(dev)->gen >= 6 &&
2378 tmp & RING_WAIT_SEMAPHORE &&
2379 semaphore_passed(ring)) {
2380 DRM_ERROR("Kicking stuck semaphore on %s\n",
2382 I915_WRITE_CTL(ring, tmp);
2388 static bool i915_hangcheck_ring_hung(struct intel_ring_buffer *ring)
2390 if (IS_GEN2(ring->dev))
2393 /* Is the chip hanging on a WAIT_FOR_EVENT?
2394 * If so we can simply poke the RB_WAIT bit
2395 * and break the hang. This should work on
2396 * all but the second generation chipsets.
2398 return !kick_ring(ring);
2402 * This is called when the chip hasn't reported back with completed
2403 * batchbuffers in a long time. We keep track per ring seqno progress and
2404 * if there are no progress, hangcheck score for that ring is increased.
2405 * Further, acthd is inspected to see if the ring is stuck. On stuck case
2406 * we kick the ring. If we see no progress on three subsequent calls
2407 * we assume chip is wedged and try to fix it by resetting the chip.
2409 void i915_hangcheck_elapsed(unsigned long data)
2411 struct drm_device *dev = (struct drm_device *)data;
2412 drm_i915_private_t *dev_priv = dev->dev_private;
2413 struct intel_ring_buffer *ring;
2415 int busy_count = 0, rings_hung = 0;
2416 bool stuck[I915_NUM_RINGS];
2418 if (!i915_enable_hangcheck)
2421 for_each_ring(ring, dev_priv, i) {
2423 bool idle, err = false;
2425 seqno = ring->get_seqno(ring, false);
2426 acthd = intel_ring_get_active_head(ring);
2427 idle = i915_hangcheck_ring_idle(ring, seqno, &err);
2428 stuck[i] = ring->hangcheck.acthd == acthd;
2432 ring->hangcheck.score += 2;
2434 ring->hangcheck.score = 0;
2438 if (ring->hangcheck.seqno == seqno) {
2439 ring->hangcheck.score++;
2441 /* Kick ring if stuck*/
2443 i915_hangcheck_ring_hung(ring);
2445 ring->hangcheck.score = 0;
2449 ring->hangcheck.seqno = seqno;
2450 ring->hangcheck.acthd = acthd;
2453 for_each_ring(ring, dev_priv, i) {
2454 if (ring->hangcheck.score > 2) {
2456 DRM_ERROR("%s: %s on %s 0x%x\n", ring->name,
2457 stuck[i] ? "stuck" : "no progress",
2458 stuck[i] ? "addr" : "seqno",
2459 stuck[i] ? ring->hangcheck.acthd & HEAD_ADDR :
2460 ring->hangcheck.seqno);
2465 return i915_handle_error(dev, true);
2468 /* Reset timer case chip hangs without another request
2470 mod_timer(&dev_priv->gpu_error.hangcheck_timer,
2471 round_jiffies_up(jiffies +
2472 DRM_I915_HANGCHECK_JIFFIES));
2477 static void ironlake_irq_preinstall(struct drm_device *dev)
2479 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2481 atomic_set(&dev_priv->irq_received, 0);
2483 I915_WRITE(HWSTAM, 0xeffe);
2485 /* XXX hotplug from PCH */
2487 I915_WRITE(DEIMR, 0xffffffff);
2488 I915_WRITE(DEIER, 0x0);
2489 POSTING_READ(DEIER);
2492 I915_WRITE(GTIMR, 0xffffffff);
2493 I915_WRITE(GTIER, 0x0);
2494 POSTING_READ(GTIER);
2496 /* south display irq */
2497 I915_WRITE(SDEIMR, 0xffffffff);
2499 * SDEIER is also touched by the interrupt handler to work around missed
2500 * PCH interrupts. Hence we can't update it after the interrupt handler
2501 * is enabled - instead we unconditionally enable all PCH interrupt
2502 * sources here, but then only unmask them as needed with SDEIMR.
2504 I915_WRITE(SDEIER, 0xffffffff);
2505 POSTING_READ(SDEIER);
2508 static void ivybridge_irq_preinstall(struct drm_device *dev)
2510 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2512 atomic_set(&dev_priv->irq_received, 0);
2514 I915_WRITE(HWSTAM, 0xeffe);
2516 /* XXX hotplug from PCH */
2518 I915_WRITE(DEIMR, 0xffffffff);
2519 I915_WRITE(DEIER, 0x0);
2520 POSTING_READ(DEIER);
2523 I915_WRITE(GTIMR, 0xffffffff);
2524 I915_WRITE(GTIER, 0x0);
2525 POSTING_READ(GTIER);
2527 /* Power management */
2528 I915_WRITE(GEN6_PMIMR, 0xffffffff);
2529 I915_WRITE(GEN6_PMIER, 0x0);
2530 POSTING_READ(GEN6_PMIER);
2532 if (HAS_PCH_NOP(dev))
2535 /* south display irq */
2536 I915_WRITE(SDEIMR, 0xffffffff);
2538 * SDEIER is also touched by the interrupt handler to work around missed
2539 * PCH interrupts. Hence we can't update it after the interrupt handler
2540 * is enabled - instead we unconditionally enable all PCH interrupt
2541 * sources here, but then only unmask them as needed with SDEIMR.
2543 I915_WRITE(SDEIER, 0xffffffff);
2544 POSTING_READ(SDEIER);
2547 static void valleyview_irq_preinstall(struct drm_device *dev)
2549 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2552 atomic_set(&dev_priv->irq_received, 0);
2555 I915_WRITE(VLV_IMR, 0);
2556 I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
2557 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
2558 I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
2561 I915_WRITE(GTIIR, I915_READ(GTIIR));
2562 I915_WRITE(GTIIR, I915_READ(GTIIR));
2563 I915_WRITE(GTIMR, 0xffffffff);
2564 I915_WRITE(GTIER, 0x0);
2565 POSTING_READ(GTIER);
2567 I915_WRITE(DPINVGTT, 0xff);
2569 I915_WRITE(PORT_HOTPLUG_EN, 0);
2570 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2572 I915_WRITE(PIPESTAT(pipe), 0xffff);
2573 I915_WRITE(VLV_IIR, 0xffffffff);
2574 I915_WRITE(VLV_IMR, 0xffffffff);
2575 I915_WRITE(VLV_IER, 0x0);
2576 POSTING_READ(VLV_IER);
2579 static void ibx_hpd_irq_setup(struct drm_device *dev)
2581 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2582 struct drm_mode_config *mode_config = &dev->mode_config;
2583 struct intel_encoder *intel_encoder;
2584 u32 mask = ~I915_READ(SDEIMR);
2587 if (HAS_PCH_IBX(dev)) {
2588 mask &= ~SDE_HOTPLUG_MASK;
2589 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
2590 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
2591 mask |= hpd_ibx[intel_encoder->hpd_pin];
2593 mask &= ~SDE_HOTPLUG_MASK_CPT;
2594 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
2595 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
2596 mask |= hpd_cpt[intel_encoder->hpd_pin];
2599 I915_WRITE(SDEIMR, ~mask);
2602 * Enable digital hotplug on the PCH, and configure the DP short pulse
2603 * duration to 2ms (which is the minimum in the Display Port spec)
2605 * This register is the same on all known PCH chips.
2607 hotplug = I915_READ(PCH_PORT_HOTPLUG);
2608 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
2609 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
2610 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
2611 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
2612 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
2615 static void ibx_irq_postinstall(struct drm_device *dev)
2617 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2620 if (HAS_PCH_NOP(dev))
2623 if (HAS_PCH_IBX(dev)) {
2624 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_TRANSB_FIFO_UNDER |
2625 SDE_TRANSA_FIFO_UNDER | SDE_POISON;
2627 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT | SDE_ERROR_CPT;
2629 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
2632 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2633 I915_WRITE(SDEIMR, ~mask);
2636 static int ironlake_irq_postinstall(struct drm_device *dev)
2638 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2639 /* enable kind of interrupts always enabled */
2640 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
2641 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
2642 DE_AUX_CHANNEL_A | DE_PIPEB_FIFO_UNDERRUN |
2643 DE_PIPEA_FIFO_UNDERRUN | DE_POISON;
2646 dev_priv->irq_mask = ~display_mask;
2648 /* should always can generate irq */
2649 I915_WRITE(DEIIR, I915_READ(DEIIR));
2650 I915_WRITE(DEIMR, dev_priv->irq_mask);
2651 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK);
2652 POSTING_READ(DEIER);
2654 dev_priv->gt_irq_mask = ~0;
2656 I915_WRITE(GTIIR, I915_READ(GTIIR));
2657 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
2659 gt_irqs = GT_RENDER_USER_INTERRUPT;
2662 gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
2664 gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT |
2665 ILK_BSD_USER_INTERRUPT;
2667 I915_WRITE(GTIER, gt_irqs);
2668 POSTING_READ(GTIER);
2670 ibx_irq_postinstall(dev);
2672 if (IS_IRONLAKE_M(dev)) {
2673 /* Clear & enable PCU event interrupts */
2674 I915_WRITE(DEIIR, DE_PCU_EVENT);
2675 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
2676 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
2682 static int ivybridge_irq_postinstall(struct drm_device *dev)
2684 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2685 /* enable kind of interrupts always enabled */
2687 DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | DE_PCH_EVENT_IVB |
2688 DE_PLANEC_FLIP_DONE_IVB |
2689 DE_PLANEB_FLIP_DONE_IVB |
2690 DE_PLANEA_FLIP_DONE_IVB |
2691 DE_AUX_CHANNEL_A_IVB |
2693 u32 pm_irqs = GEN6_PM_RPS_EVENTS;
2696 dev_priv->irq_mask = ~display_mask;
2698 /* should always can generate irq */
2699 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
2700 I915_WRITE(DEIIR, I915_READ(DEIIR));
2701 I915_WRITE(DEIMR, dev_priv->irq_mask);
2704 DE_PIPEC_VBLANK_IVB |
2705 DE_PIPEB_VBLANK_IVB |
2706 DE_PIPEA_VBLANK_IVB);
2707 POSTING_READ(DEIER);
2709 dev_priv->gt_irq_mask = ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
2711 I915_WRITE(GTIIR, I915_READ(GTIIR));
2712 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
2714 gt_irqs = GT_RENDER_USER_INTERRUPT | GT_BSD_USER_INTERRUPT |
2715 GT_BLT_USER_INTERRUPT | GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
2716 I915_WRITE(GTIER, gt_irqs);
2717 POSTING_READ(GTIER);
2719 I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
2721 pm_irqs |= PM_VEBOX_USER_INTERRUPT |
2722 PM_VEBOX_CS_ERROR_INTERRUPT;
2724 /* Our enable/disable rps functions may touch these registers so
2725 * make sure to set a known state for only the non-RPS bits.
2726 * The RMW is extra paranoia since this should be called after being set
2727 * to a known state in preinstall.
2729 I915_WRITE(GEN6_PMIMR,
2730 (I915_READ(GEN6_PMIMR) | ~GEN6_PM_RPS_EVENTS) & ~pm_irqs);
2731 I915_WRITE(GEN6_PMIER,
2732 (I915_READ(GEN6_PMIER) & GEN6_PM_RPS_EVENTS) | pm_irqs);
2733 POSTING_READ(GEN6_PMIER);
2735 ibx_irq_postinstall(dev);
2740 static int valleyview_irq_postinstall(struct drm_device *dev)
2742 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2745 u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV;
2747 enable_mask = I915_DISPLAY_PORT_INTERRUPT;
2748 enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2749 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2750 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2751 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2754 *Leave vblank interrupts masked initially. enable/disable will
2755 * toggle them based on usage.
2757 dev_priv->irq_mask = (~enable_mask) |
2758 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2759 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2761 I915_WRITE(PORT_HOTPLUG_EN, 0);
2762 POSTING_READ(PORT_HOTPLUG_EN);
2764 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
2765 I915_WRITE(VLV_IER, enable_mask);
2766 I915_WRITE(VLV_IIR, 0xffffffff);
2767 I915_WRITE(PIPESTAT(0), 0xffff);
2768 I915_WRITE(PIPESTAT(1), 0xffff);
2769 POSTING_READ(VLV_IER);
2771 i915_enable_pipestat(dev_priv, 0, pipestat_enable);
2772 i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
2773 i915_enable_pipestat(dev_priv, 1, pipestat_enable);
2775 I915_WRITE(VLV_IIR, 0xffffffff);
2776 I915_WRITE(VLV_IIR, 0xffffffff);
2778 I915_WRITE(GTIIR, I915_READ(GTIIR));
2779 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
2781 gt_irqs = GT_RENDER_USER_INTERRUPT | GT_BSD_USER_INTERRUPT |
2782 GT_BLT_USER_INTERRUPT;
2783 I915_WRITE(GTIER, gt_irqs);
2784 POSTING_READ(GTIER);
2786 /* ack & enable invalid PTE error interrupts */
2787 #if 0 /* FIXME: add support to irq handler for checking these bits */
2788 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
2789 I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
2792 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
2797 static void valleyview_irq_uninstall(struct drm_device *dev)
2799 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2805 del_timer_sync(&dev_priv->hotplug_reenable_timer);
2808 I915_WRITE(PIPESTAT(pipe), 0xffff);
2810 I915_WRITE(HWSTAM, 0xffffffff);
2811 I915_WRITE(PORT_HOTPLUG_EN, 0);
2812 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2814 I915_WRITE(PIPESTAT(pipe), 0xffff);
2815 I915_WRITE(VLV_IIR, 0xffffffff);
2816 I915_WRITE(VLV_IMR, 0xffffffff);
2817 I915_WRITE(VLV_IER, 0x0);
2818 POSTING_READ(VLV_IER);
2821 static void ironlake_irq_uninstall(struct drm_device *dev)
2823 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2828 del_timer_sync(&dev_priv->hotplug_reenable_timer);
2830 I915_WRITE(HWSTAM, 0xffffffff);
2832 I915_WRITE(DEIMR, 0xffffffff);
2833 I915_WRITE(DEIER, 0x0);
2834 I915_WRITE(DEIIR, I915_READ(DEIIR));
2836 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
2838 I915_WRITE(GTIMR, 0xffffffff);
2839 I915_WRITE(GTIER, 0x0);
2840 I915_WRITE(GTIIR, I915_READ(GTIIR));
2842 if (HAS_PCH_NOP(dev))
2845 I915_WRITE(SDEIMR, 0xffffffff);
2846 I915_WRITE(SDEIER, 0x0);
2847 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2848 if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev))
2849 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
2852 static void i8xx_irq_preinstall(struct drm_device * dev)
2854 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2857 atomic_set(&dev_priv->irq_received, 0);
2860 I915_WRITE(PIPESTAT(pipe), 0);
2861 I915_WRITE16(IMR, 0xffff);
2862 I915_WRITE16(IER, 0x0);
2863 POSTING_READ16(IER);
2866 static int i8xx_irq_postinstall(struct drm_device *dev)
2868 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2871 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2873 /* Unmask the interrupts that we always want on. */
2874 dev_priv->irq_mask =
2875 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2876 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2877 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2878 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2879 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2880 I915_WRITE16(IMR, dev_priv->irq_mask);
2883 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2884 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2885 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2886 I915_USER_INTERRUPT);
2887 POSTING_READ16(IER);
2893 * Returns true when a page flip has completed.
2895 static bool i8xx_handle_vblank(struct drm_device *dev,
2898 drm_i915_private_t *dev_priv = dev->dev_private;
2899 u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(pipe);
2901 if (!drm_handle_vblank(dev, pipe))
2904 if ((iir & flip_pending) == 0)
2907 intel_prepare_page_flip(dev, pipe);
2909 /* We detect FlipDone by looking for the change in PendingFlip from '1'
2910 * to '0' on the following vblank, i.e. IIR has the Pendingflip
2911 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
2912 * the flip is completed (no longer pending). Since this doesn't raise
2913 * an interrupt per se, we watch for the change at vblank.
2915 if (I915_READ16(ISR) & flip_pending)
2918 intel_finish_page_flip(dev, pipe);
2923 static irqreturn_t i8xx_irq_handler(int irq, void *arg)
2925 struct drm_device *dev = (struct drm_device *) arg;
2926 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2929 unsigned long irqflags;
2933 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2934 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2936 atomic_inc(&dev_priv->irq_received);
2938 iir = I915_READ16(IIR);
2942 while (iir & ~flip_mask) {
2943 /* Can't rely on pipestat interrupt bit in iir as it might
2944 * have been cleared after the pipestat interrupt was received.
2945 * It doesn't set the bit in iir again, but it still produces
2946 * interrupts (for non-MSI).
2948 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2949 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2950 i915_handle_error(dev, false);
2952 for_each_pipe(pipe) {
2953 int reg = PIPESTAT(pipe);
2954 pipe_stats[pipe] = I915_READ(reg);
2957 * Clear the PIPE*STAT regs before the IIR
2959 if (pipe_stats[pipe] & 0x8000ffff) {
2960 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2961 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2963 I915_WRITE(reg, pipe_stats[pipe]);
2967 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2969 I915_WRITE16(IIR, iir & ~flip_mask);
2970 new_iir = I915_READ16(IIR); /* Flush posted writes */
2972 i915_update_dri1_breadcrumb(dev);
2974 if (iir & I915_USER_INTERRUPT)
2975 notify_ring(dev, &dev_priv->ring[RCS]);
2977 if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
2978 i8xx_handle_vblank(dev, 0, iir))
2979 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(0);
2981 if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
2982 i8xx_handle_vblank(dev, 1, iir))
2983 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(1);
2991 static void i8xx_irq_uninstall(struct drm_device * dev)
2993 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2996 for_each_pipe(pipe) {
2997 /* Clear enable bits; then clear status bits */
2998 I915_WRITE(PIPESTAT(pipe), 0);
2999 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
3001 I915_WRITE16(IMR, 0xffff);
3002 I915_WRITE16(IER, 0x0);
3003 I915_WRITE16(IIR, I915_READ16(IIR));
3006 static void i915_irq_preinstall(struct drm_device * dev)
3008 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3011 atomic_set(&dev_priv->irq_received, 0);
3013 if (I915_HAS_HOTPLUG(dev)) {
3014 I915_WRITE(PORT_HOTPLUG_EN, 0);
3015 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3018 I915_WRITE16(HWSTAM, 0xeffe);
3020 I915_WRITE(PIPESTAT(pipe), 0);
3021 I915_WRITE(IMR, 0xffffffff);
3022 I915_WRITE(IER, 0x0);
3026 static int i915_irq_postinstall(struct drm_device *dev)
3028 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3031 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
3033 /* Unmask the interrupts that we always want on. */
3034 dev_priv->irq_mask =
3035 ~(I915_ASLE_INTERRUPT |
3036 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3037 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3038 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3039 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3040 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3043 I915_ASLE_INTERRUPT |
3044 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3045 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3046 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
3047 I915_USER_INTERRUPT;
3049 if (I915_HAS_HOTPLUG(dev)) {
3050 I915_WRITE(PORT_HOTPLUG_EN, 0);
3051 POSTING_READ(PORT_HOTPLUG_EN);
3053 /* Enable in IER... */
3054 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
3055 /* and unmask in IMR */
3056 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
3059 I915_WRITE(IMR, dev_priv->irq_mask);
3060 I915_WRITE(IER, enable_mask);
3063 i915_enable_asle_pipestat(dev);
3069 * Returns true when a page flip has completed.
3071 static bool i915_handle_vblank(struct drm_device *dev,
3072 int plane, int pipe, u32 iir)
3074 drm_i915_private_t *dev_priv = dev->dev_private;
3075 u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
3077 if (!drm_handle_vblank(dev, pipe))
3080 if ((iir & flip_pending) == 0)
3083 intel_prepare_page_flip(dev, plane);
3085 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3086 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3087 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3088 * the flip is completed (no longer pending). Since this doesn't raise
3089 * an interrupt per se, we watch for the change at vblank.
3091 if (I915_READ(ISR) & flip_pending)
3094 intel_finish_page_flip(dev, pipe);
3099 static irqreturn_t i915_irq_handler(int irq, void *arg)
3101 struct drm_device *dev = (struct drm_device *) arg;
3102 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3103 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
3104 unsigned long irqflags;
3106 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3107 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3108 int pipe, ret = IRQ_NONE;
3110 atomic_inc(&dev_priv->irq_received);
3112 iir = I915_READ(IIR);
3114 bool irq_received = (iir & ~flip_mask) != 0;
3115 bool blc_event = false;
3117 /* Can't rely on pipestat interrupt bit in iir as it might
3118 * have been cleared after the pipestat interrupt was received.
3119 * It doesn't set the bit in iir again, but it still produces
3120 * interrupts (for non-MSI).
3122 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3123 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3124 i915_handle_error(dev, false);
3126 for_each_pipe(pipe) {
3127 int reg = PIPESTAT(pipe);
3128 pipe_stats[pipe] = I915_READ(reg);
3130 /* Clear the PIPE*STAT regs before the IIR */
3131 if (pipe_stats[pipe] & 0x8000ffff) {
3132 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3133 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3135 I915_WRITE(reg, pipe_stats[pipe]);
3136 irq_received = true;
3139 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3144 /* Consume port. Then clear IIR or we'll miss events */
3145 if ((I915_HAS_HOTPLUG(dev)) &&
3146 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
3147 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3148 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
3150 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
3152 if (hotplug_trigger) {
3153 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_status_i915))
3154 i915_hpd_irq_setup(dev);
3155 queue_work(dev_priv->wq,
3156 &dev_priv->hotplug_work);
3158 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
3159 POSTING_READ(PORT_HOTPLUG_STAT);
3162 I915_WRITE(IIR, iir & ~flip_mask);
3163 new_iir = I915_READ(IIR); /* Flush posted writes */
3165 if (iir & I915_USER_INTERRUPT)
3166 notify_ring(dev, &dev_priv->ring[RCS]);
3168 for_each_pipe(pipe) {
3173 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
3174 i915_handle_vblank(dev, plane, pipe, iir))
3175 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
3177 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
3181 if (blc_event || (iir & I915_ASLE_INTERRUPT))
3182 intel_opregion_asle_intr(dev);
3184 /* With MSI, interrupts are only generated when iir
3185 * transitions from zero to nonzero. If another bit got
3186 * set while we were handling the existing iir bits, then
3187 * we would never get another interrupt.
3189 * This is fine on non-MSI as well, as if we hit this path
3190 * we avoid exiting the interrupt handler only to generate
3193 * Note that for MSI this could cause a stray interrupt report
3194 * if an interrupt landed in the time between writing IIR and
3195 * the posting read. This should be rare enough to never
3196 * trigger the 99% of 100,000 interrupts test for disabling
3201 } while (iir & ~flip_mask);
3203 i915_update_dri1_breadcrumb(dev);
3208 static void i915_irq_uninstall(struct drm_device * dev)
3210 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3213 del_timer_sync(&dev_priv->hotplug_reenable_timer);
3215 if (I915_HAS_HOTPLUG(dev)) {
3216 I915_WRITE(PORT_HOTPLUG_EN, 0);
3217 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3220 I915_WRITE16(HWSTAM, 0xffff);
3221 for_each_pipe(pipe) {
3222 /* Clear enable bits; then clear status bits */
3223 I915_WRITE(PIPESTAT(pipe), 0);
3224 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
3226 I915_WRITE(IMR, 0xffffffff);
3227 I915_WRITE(IER, 0x0);
3229 I915_WRITE(IIR, I915_READ(IIR));
3232 static void i965_irq_preinstall(struct drm_device * dev)
3234 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3237 atomic_set(&dev_priv->irq_received, 0);
3239 I915_WRITE(PORT_HOTPLUG_EN, 0);
3240 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3242 I915_WRITE(HWSTAM, 0xeffe);
3244 I915_WRITE(PIPESTAT(pipe), 0);
3245 I915_WRITE(IMR, 0xffffffff);
3246 I915_WRITE(IER, 0x0);
3250 static int i965_irq_postinstall(struct drm_device *dev)
3252 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3256 /* Unmask the interrupts that we always want on. */
3257 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
3258 I915_DISPLAY_PORT_INTERRUPT |
3259 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3260 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3261 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3262 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3263 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3265 enable_mask = ~dev_priv->irq_mask;
3266 enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3267 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
3268 enable_mask |= I915_USER_INTERRUPT;
3271 enable_mask |= I915_BSD_USER_INTERRUPT;
3273 i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
3276 * Enable some error detection, note the instruction error mask
3277 * bit is reserved, so we leave it masked.
3280 error_mask = ~(GM45_ERROR_PAGE_TABLE |
3281 GM45_ERROR_MEM_PRIV |
3282 GM45_ERROR_CP_PRIV |
3283 I915_ERROR_MEMORY_REFRESH);
3285 error_mask = ~(I915_ERROR_PAGE_TABLE |
3286 I915_ERROR_MEMORY_REFRESH);
3288 I915_WRITE(EMR, error_mask);
3290 I915_WRITE(IMR, dev_priv->irq_mask);
3291 I915_WRITE(IER, enable_mask);
3294 I915_WRITE(PORT_HOTPLUG_EN, 0);
3295 POSTING_READ(PORT_HOTPLUG_EN);
3297 i915_enable_asle_pipestat(dev);
3302 static void i915_hpd_irq_setup(struct drm_device *dev)
3304 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3305 struct drm_mode_config *mode_config = &dev->mode_config;
3306 struct intel_encoder *intel_encoder;
3309 if (I915_HAS_HOTPLUG(dev)) {
3310 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
3311 hotplug_en &= ~HOTPLUG_INT_EN_MASK;
3312 /* Note HDMI and DP share hotplug bits */
3313 /* enable bits are the same for all generations */
3314 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
3315 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
3316 hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin];
3317 /* Programming the CRT detection parameters tends
3318 to generate a spurious hotplug event about three
3319 seconds later. So just do it once.
3322 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
3323 hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK;
3324 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
3326 /* Ignore TV since it's buggy */
3327 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
3331 static irqreturn_t i965_irq_handler(int irq, void *arg)
3333 struct drm_device *dev = (struct drm_device *) arg;
3334 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3336 u32 pipe_stats[I915_MAX_PIPES];
3337 unsigned long irqflags;
3339 int ret = IRQ_NONE, pipe;
3341 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3342 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3344 atomic_inc(&dev_priv->irq_received);
3346 iir = I915_READ(IIR);
3349 bool blc_event = false;
3351 irq_received = (iir & ~flip_mask) != 0;
3353 /* Can't rely on pipestat interrupt bit in iir as it might
3354 * have been cleared after the pipestat interrupt was received.
3355 * It doesn't set the bit in iir again, but it still produces
3356 * interrupts (for non-MSI).
3358 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3359 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3360 i915_handle_error(dev, false);
3362 for_each_pipe(pipe) {
3363 int reg = PIPESTAT(pipe);
3364 pipe_stats[pipe] = I915_READ(reg);
3367 * Clear the PIPE*STAT regs before the IIR
3369 if (pipe_stats[pipe] & 0x8000ffff) {
3370 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3371 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3373 I915_WRITE(reg, pipe_stats[pipe]);
3377 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3384 /* Consume port. Then clear IIR or we'll miss events */
3385 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
3386 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3387 u32 hotplug_trigger = hotplug_status & (IS_G4X(dev) ?
3388 HOTPLUG_INT_STATUS_G4X :
3389 HOTPLUG_INT_STATUS_I965);
3391 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
3393 if (hotplug_trigger) {
3394 if (hotplug_irq_storm_detect(dev, hotplug_trigger,
3395 IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i965))
3396 i915_hpd_irq_setup(dev);
3397 queue_work(dev_priv->wq,
3398 &dev_priv->hotplug_work);
3400 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
3401 I915_READ(PORT_HOTPLUG_STAT);
3404 I915_WRITE(IIR, iir & ~flip_mask);
3405 new_iir = I915_READ(IIR); /* Flush posted writes */
3407 if (iir & I915_USER_INTERRUPT)
3408 notify_ring(dev, &dev_priv->ring[RCS]);
3409 if (iir & I915_BSD_USER_INTERRUPT)
3410 notify_ring(dev, &dev_priv->ring[VCS]);
3412 for_each_pipe(pipe) {
3413 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
3414 i915_handle_vblank(dev, pipe, pipe, iir))
3415 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
3417 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
3422 if (blc_event || (iir & I915_ASLE_INTERRUPT))
3423 intel_opregion_asle_intr(dev);
3425 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
3426 gmbus_irq_handler(dev);
3428 /* With MSI, interrupts are only generated when iir
3429 * transitions from zero to nonzero. If another bit got
3430 * set while we were handling the existing iir bits, then
3431 * we would never get another interrupt.
3433 * This is fine on non-MSI as well, as if we hit this path
3434 * we avoid exiting the interrupt handler only to generate
3437 * Note that for MSI this could cause a stray interrupt report
3438 * if an interrupt landed in the time between writing IIR and
3439 * the posting read. This should be rare enough to never
3440 * trigger the 99% of 100,000 interrupts test for disabling
3446 i915_update_dri1_breadcrumb(dev);
3451 static void i965_irq_uninstall(struct drm_device * dev)
3453 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3459 del_timer_sync(&dev_priv->hotplug_reenable_timer);
3461 I915_WRITE(PORT_HOTPLUG_EN, 0);
3462 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3464 I915_WRITE(HWSTAM, 0xffffffff);
3466 I915_WRITE(PIPESTAT(pipe), 0);
3467 I915_WRITE(IMR, 0xffffffff);
3468 I915_WRITE(IER, 0x0);
3471 I915_WRITE(PIPESTAT(pipe),
3472 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
3473 I915_WRITE(IIR, I915_READ(IIR));
3476 static void i915_reenable_hotplug_timer_func(unsigned long data)
3478 drm_i915_private_t *dev_priv = (drm_i915_private_t *)data;
3479 struct drm_device *dev = dev_priv->dev;
3480 struct drm_mode_config *mode_config = &dev->mode_config;
3481 unsigned long irqflags;
3484 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3485 for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) {
3486 struct drm_connector *connector;
3488 if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED)
3491 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
3493 list_for_each_entry(connector, &mode_config->connector_list, head) {
3494 struct intel_connector *intel_connector = to_intel_connector(connector);
3496 if (intel_connector->encoder->hpd_pin == i) {
3497 if (connector->polled != intel_connector->polled)
3498 DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
3499 drm_get_connector_name(connector));
3500 connector->polled = intel_connector->polled;
3501 if (!connector->polled)
3502 connector->polled = DRM_CONNECTOR_POLL_HPD;
3506 if (dev_priv->display.hpd_irq_setup)
3507 dev_priv->display.hpd_irq_setup(dev);
3508 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3511 void intel_irq_init(struct drm_device *dev)
3513 struct drm_i915_private *dev_priv = dev->dev_private;
3515 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
3516 INIT_WORK(&dev_priv->gpu_error.work, i915_error_work_func);
3517 INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
3518 INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
3520 setup_timer(&dev_priv->gpu_error.hangcheck_timer,
3521 i915_hangcheck_elapsed,
3522 (unsigned long) dev);
3523 setup_timer(&dev_priv->hotplug_reenable_timer, i915_reenable_hotplug_timer_func,
3524 (unsigned long) dev_priv);
3526 pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
3528 dev->driver->get_vblank_counter = i915_get_vblank_counter;
3529 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
3530 if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
3531 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
3532 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
3535 if (drm_core_check_feature(dev, DRIVER_MODESET))
3536 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
3538 dev->driver->get_vblank_timestamp = NULL;
3539 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
3541 if (IS_VALLEYVIEW(dev)) {
3542 dev->driver->irq_handler = valleyview_irq_handler;
3543 dev->driver->irq_preinstall = valleyview_irq_preinstall;
3544 dev->driver->irq_postinstall = valleyview_irq_postinstall;
3545 dev->driver->irq_uninstall = valleyview_irq_uninstall;
3546 dev->driver->enable_vblank = valleyview_enable_vblank;
3547 dev->driver->disable_vblank = valleyview_disable_vblank;
3548 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3549 } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
3550 /* Share uninstall handlers with ILK/SNB */
3551 dev->driver->irq_handler = ivybridge_irq_handler;
3552 dev->driver->irq_preinstall = ivybridge_irq_preinstall;
3553 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
3554 dev->driver->irq_uninstall = ironlake_irq_uninstall;
3555 dev->driver->enable_vblank = ivybridge_enable_vblank;
3556 dev->driver->disable_vblank = ivybridge_disable_vblank;
3557 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
3558 } else if (HAS_PCH_SPLIT(dev)) {
3559 dev->driver->irq_handler = ironlake_irq_handler;
3560 dev->driver->irq_preinstall = ironlake_irq_preinstall;
3561 dev->driver->irq_postinstall = ironlake_irq_postinstall;
3562 dev->driver->irq_uninstall = ironlake_irq_uninstall;
3563 dev->driver->enable_vblank = ironlake_enable_vblank;
3564 dev->driver->disable_vblank = ironlake_disable_vblank;
3565 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
3567 if (INTEL_INFO(dev)->gen == 2) {
3568 dev->driver->irq_preinstall = i8xx_irq_preinstall;
3569 dev->driver->irq_postinstall = i8xx_irq_postinstall;
3570 dev->driver->irq_handler = i8xx_irq_handler;
3571 dev->driver->irq_uninstall = i8xx_irq_uninstall;
3572 } else if (INTEL_INFO(dev)->gen == 3) {
3573 dev->driver->irq_preinstall = i915_irq_preinstall;
3574 dev->driver->irq_postinstall = i915_irq_postinstall;
3575 dev->driver->irq_uninstall = i915_irq_uninstall;
3576 dev->driver->irq_handler = i915_irq_handler;
3577 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3579 dev->driver->irq_preinstall = i965_irq_preinstall;
3580 dev->driver->irq_postinstall = i965_irq_postinstall;
3581 dev->driver->irq_uninstall = i965_irq_uninstall;
3582 dev->driver->irq_handler = i965_irq_handler;
3583 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3585 dev->driver->enable_vblank = i915_enable_vblank;
3586 dev->driver->disable_vblank = i915_disable_vblank;
3590 void intel_hpd_init(struct drm_device *dev)
3592 struct drm_i915_private *dev_priv = dev->dev_private;
3593 struct drm_mode_config *mode_config = &dev->mode_config;
3594 struct drm_connector *connector;
3597 for (i = 1; i < HPD_NUM_PINS; i++) {
3598 dev_priv->hpd_stats[i].hpd_cnt = 0;
3599 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
3601 list_for_each_entry(connector, &mode_config->connector_list, head) {
3602 struct intel_connector *intel_connector = to_intel_connector(connector);
3603 connector->polled = intel_connector->polled;
3604 if (!connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE)
3605 connector->polled = DRM_CONNECTOR_POLL_HPD;
3607 if (dev_priv->display.hpd_irq_setup)
3608 dev_priv->display.hpd_irq_setup(dev);