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>
33 #include <linux/circ_buf.h>
35 #include <drm/i915_drm.h>
37 #include "i915_trace.h"
38 #include "intel_drv.h"
40 static const u32 hpd_ibx[] = {
41 [HPD_CRT] = SDE_CRT_HOTPLUG,
42 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
43 [HPD_PORT_B] = SDE_PORTB_HOTPLUG,
44 [HPD_PORT_C] = SDE_PORTC_HOTPLUG,
45 [HPD_PORT_D] = SDE_PORTD_HOTPLUG
48 static const u32 hpd_cpt[] = {
49 [HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
50 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
51 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
52 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
53 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
56 static const u32 hpd_mask_i915[] = {
57 [HPD_CRT] = CRT_HOTPLUG_INT_EN,
58 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
59 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
60 [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
61 [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
62 [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
65 static const u32 hpd_status_g4x[] = {
66 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
67 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
68 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
69 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
70 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
71 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
74 static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */
75 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
76 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
77 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
78 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
79 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
80 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
83 /* For display hotplug interrupt */
85 ironlake_enable_display_irq(struct drm_i915_private *dev_priv, u32 mask)
87 assert_spin_locked(&dev_priv->irq_lock);
89 if (dev_priv->pm.irqs_disabled) {
90 WARN(1, "IRQs disabled\n");
91 dev_priv->pm.regsave.deimr &= ~mask;
95 if ((dev_priv->irq_mask & mask) != 0) {
96 dev_priv->irq_mask &= ~mask;
97 I915_WRITE(DEIMR, dev_priv->irq_mask);
103 ironlake_disable_display_irq(struct drm_i915_private *dev_priv, u32 mask)
105 assert_spin_locked(&dev_priv->irq_lock);
107 if (dev_priv->pm.irqs_disabled) {
108 WARN(1, "IRQs disabled\n");
109 dev_priv->pm.regsave.deimr |= mask;
113 if ((dev_priv->irq_mask & mask) != mask) {
114 dev_priv->irq_mask |= mask;
115 I915_WRITE(DEIMR, dev_priv->irq_mask);
121 * ilk_update_gt_irq - update GTIMR
122 * @dev_priv: driver private
123 * @interrupt_mask: mask of interrupt bits to update
124 * @enabled_irq_mask: mask of interrupt bits to enable
126 static void ilk_update_gt_irq(struct drm_i915_private *dev_priv,
127 uint32_t interrupt_mask,
128 uint32_t enabled_irq_mask)
130 assert_spin_locked(&dev_priv->irq_lock);
132 if (dev_priv->pm.irqs_disabled) {
133 WARN(1, "IRQs disabled\n");
134 dev_priv->pm.regsave.gtimr &= ~interrupt_mask;
135 dev_priv->pm.regsave.gtimr |= (~enabled_irq_mask &
140 dev_priv->gt_irq_mask &= ~interrupt_mask;
141 dev_priv->gt_irq_mask |= (~enabled_irq_mask & interrupt_mask);
142 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
146 void ilk_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
148 ilk_update_gt_irq(dev_priv, mask, mask);
151 void ilk_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
153 ilk_update_gt_irq(dev_priv, mask, 0);
157 * snb_update_pm_irq - update GEN6_PMIMR
158 * @dev_priv: driver private
159 * @interrupt_mask: mask of interrupt bits to update
160 * @enabled_irq_mask: mask of interrupt bits to enable
162 static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
163 uint32_t interrupt_mask,
164 uint32_t enabled_irq_mask)
168 assert_spin_locked(&dev_priv->irq_lock);
170 if (dev_priv->pm.irqs_disabled) {
171 WARN(1, "IRQs disabled\n");
172 dev_priv->pm.regsave.gen6_pmimr &= ~interrupt_mask;
173 dev_priv->pm.regsave.gen6_pmimr |= (~enabled_irq_mask &
178 new_val = dev_priv->pm_irq_mask;
179 new_val &= ~interrupt_mask;
180 new_val |= (~enabled_irq_mask & interrupt_mask);
182 if (new_val != dev_priv->pm_irq_mask) {
183 dev_priv->pm_irq_mask = new_val;
184 I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask);
185 POSTING_READ(GEN6_PMIMR);
189 void snb_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
191 snb_update_pm_irq(dev_priv, mask, mask);
194 void snb_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
196 snb_update_pm_irq(dev_priv, mask, 0);
199 static bool ivb_can_enable_err_int(struct drm_device *dev)
201 struct drm_i915_private *dev_priv = dev->dev_private;
202 struct intel_crtc *crtc;
205 assert_spin_locked(&dev_priv->irq_lock);
207 for_each_pipe(pipe) {
208 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
210 if (crtc->cpu_fifo_underrun_disabled)
217 static bool cpt_can_enable_serr_int(struct drm_device *dev)
219 struct drm_i915_private *dev_priv = dev->dev_private;
221 struct intel_crtc *crtc;
223 assert_spin_locked(&dev_priv->irq_lock);
225 for_each_pipe(pipe) {
226 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
228 if (crtc->pch_fifo_underrun_disabled)
235 static void i9xx_clear_fifo_underrun(struct drm_device *dev, enum pipe pipe)
237 struct drm_i915_private *dev_priv = dev->dev_private;
238 u32 reg = PIPESTAT(pipe);
239 u32 pipestat = I915_READ(reg) & 0x7fff0000;
241 assert_spin_locked(&dev_priv->irq_lock);
243 I915_WRITE(reg, pipestat | PIPE_FIFO_UNDERRUN_STATUS);
247 static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev,
248 enum pipe pipe, bool enable)
250 struct drm_i915_private *dev_priv = dev->dev_private;
251 uint32_t bit = (pipe == PIPE_A) ? DE_PIPEA_FIFO_UNDERRUN :
252 DE_PIPEB_FIFO_UNDERRUN;
255 ironlake_enable_display_irq(dev_priv, bit);
257 ironlake_disable_display_irq(dev_priv, bit);
260 static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev,
261 enum pipe pipe, bool enable)
263 struct drm_i915_private *dev_priv = dev->dev_private;
265 I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN(pipe));
267 if (!ivb_can_enable_err_int(dev))
270 ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
272 bool was_enabled = !(I915_READ(DEIMR) & DE_ERR_INT_IVB);
274 /* Change the state _after_ we've read out the current one. */
275 ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
278 (I915_READ(GEN7_ERR_INT) & ERR_INT_FIFO_UNDERRUN(pipe))) {
279 DRM_DEBUG_KMS("uncleared fifo underrun on pipe %c\n",
285 static void broadwell_set_fifo_underrun_reporting(struct drm_device *dev,
286 enum pipe pipe, bool enable)
288 struct drm_i915_private *dev_priv = dev->dev_private;
290 assert_spin_locked(&dev_priv->irq_lock);
293 dev_priv->de_irq_mask[pipe] &= ~GEN8_PIPE_FIFO_UNDERRUN;
295 dev_priv->de_irq_mask[pipe] |= GEN8_PIPE_FIFO_UNDERRUN;
296 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
297 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
301 * ibx_display_interrupt_update - update SDEIMR
302 * @dev_priv: driver private
303 * @interrupt_mask: mask of interrupt bits to update
304 * @enabled_irq_mask: mask of interrupt bits to enable
306 static void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
307 uint32_t interrupt_mask,
308 uint32_t enabled_irq_mask)
310 uint32_t sdeimr = I915_READ(SDEIMR);
311 sdeimr &= ~interrupt_mask;
312 sdeimr |= (~enabled_irq_mask & interrupt_mask);
314 assert_spin_locked(&dev_priv->irq_lock);
316 if (dev_priv->pm.irqs_disabled &&
317 (interrupt_mask & SDE_HOTPLUG_MASK_CPT)) {
318 WARN(1, "IRQs disabled\n");
319 dev_priv->pm.regsave.sdeimr &= ~interrupt_mask;
320 dev_priv->pm.regsave.sdeimr |= (~enabled_irq_mask &
325 I915_WRITE(SDEIMR, sdeimr);
326 POSTING_READ(SDEIMR);
328 #define ibx_enable_display_interrupt(dev_priv, bits) \
329 ibx_display_interrupt_update((dev_priv), (bits), (bits))
330 #define ibx_disable_display_interrupt(dev_priv, bits) \
331 ibx_display_interrupt_update((dev_priv), (bits), 0)
333 static void ibx_set_fifo_underrun_reporting(struct drm_device *dev,
334 enum transcoder pch_transcoder,
337 struct drm_i915_private *dev_priv = dev->dev_private;
338 uint32_t bit = (pch_transcoder == TRANSCODER_A) ?
339 SDE_TRANSA_FIFO_UNDER : SDE_TRANSB_FIFO_UNDER;
342 ibx_enable_display_interrupt(dev_priv, bit);
344 ibx_disable_display_interrupt(dev_priv, bit);
347 static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
348 enum transcoder pch_transcoder,
351 struct drm_i915_private *dev_priv = dev->dev_private;
355 SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder));
357 if (!cpt_can_enable_serr_int(dev))
360 ibx_enable_display_interrupt(dev_priv, SDE_ERROR_CPT);
362 uint32_t tmp = I915_READ(SERR_INT);
363 bool was_enabled = !(I915_READ(SDEIMR) & SDE_ERROR_CPT);
365 /* Change the state _after_ we've read out the current one. */
366 ibx_disable_display_interrupt(dev_priv, SDE_ERROR_CPT);
369 (tmp & SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder))) {
370 DRM_DEBUG_KMS("uncleared pch fifo underrun on pch transcoder %c\n",
371 transcoder_name(pch_transcoder));
377 * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
380 * @enable: true if we want to report FIFO underrun errors, false otherwise
382 * This function makes us disable or enable CPU fifo underruns for a specific
383 * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
384 * reporting for one pipe may also disable all the other CPU error interruts for
385 * the other pipes, due to the fact that there's just one interrupt mask/enable
386 * bit for all the pipes.
388 * Returns the previous state of underrun reporting.
390 bool __intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
391 enum pipe pipe, bool enable)
393 struct drm_i915_private *dev_priv = dev->dev_private;
394 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
395 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
398 assert_spin_locked(&dev_priv->irq_lock);
400 ret = !intel_crtc->cpu_fifo_underrun_disabled;
405 intel_crtc->cpu_fifo_underrun_disabled = !enable;
407 if (enable && (INTEL_INFO(dev)->gen < 5 || IS_VALLEYVIEW(dev)))
408 i9xx_clear_fifo_underrun(dev, pipe);
409 else if (IS_GEN5(dev) || IS_GEN6(dev))
410 ironlake_set_fifo_underrun_reporting(dev, pipe, enable);
411 else if (IS_GEN7(dev))
412 ivybridge_set_fifo_underrun_reporting(dev, pipe, enable);
413 else if (IS_GEN8(dev))
414 broadwell_set_fifo_underrun_reporting(dev, pipe, enable);
420 bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
421 enum pipe pipe, bool enable)
423 struct drm_i915_private *dev_priv = dev->dev_private;
427 spin_lock_irqsave(&dev_priv->irq_lock, flags);
428 ret = __intel_set_cpu_fifo_underrun_reporting(dev, pipe, enable);
429 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
434 static bool __cpu_fifo_underrun_reporting_enabled(struct drm_device *dev,
437 struct drm_i915_private *dev_priv = dev->dev_private;
438 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
439 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
441 return !intel_crtc->cpu_fifo_underrun_disabled;
445 * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
447 * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
448 * @enable: true if we want to report FIFO underrun errors, false otherwise
450 * This function makes us disable or enable PCH fifo underruns for a specific
451 * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
452 * underrun reporting for one transcoder may also disable all the other PCH
453 * error interruts for the other transcoders, due to the fact that there's just
454 * one interrupt mask/enable bit for all the transcoders.
456 * Returns the previous state of underrun reporting.
458 bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
459 enum transcoder pch_transcoder,
462 struct drm_i915_private *dev_priv = dev->dev_private;
463 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder];
464 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
469 * NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT
470 * has only one pch transcoder A that all pipes can use. To avoid racy
471 * pch transcoder -> pipe lookups from interrupt code simply store the
472 * underrun statistics in crtc A. Since we never expose this anywhere
473 * nor use it outside of the fifo underrun code here using the "wrong"
474 * crtc on LPT won't cause issues.
477 spin_lock_irqsave(&dev_priv->irq_lock, flags);
479 ret = !intel_crtc->pch_fifo_underrun_disabled;
484 intel_crtc->pch_fifo_underrun_disabled = !enable;
486 if (HAS_PCH_IBX(dev))
487 ibx_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
489 cpt_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
492 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
498 __i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
499 u32 enable_mask, u32 status_mask)
501 u32 reg = PIPESTAT(pipe);
502 u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
504 assert_spin_locked(&dev_priv->irq_lock);
506 if (WARN_ON_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
507 status_mask & ~PIPESTAT_INT_STATUS_MASK))
510 if ((pipestat & enable_mask) == enable_mask)
513 dev_priv->pipestat_irq_mask[pipe] |= status_mask;
515 /* Enable the interrupt, clear any pending status */
516 pipestat |= enable_mask | status_mask;
517 I915_WRITE(reg, pipestat);
522 __i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
523 u32 enable_mask, u32 status_mask)
525 u32 reg = PIPESTAT(pipe);
526 u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
528 assert_spin_locked(&dev_priv->irq_lock);
530 if (WARN_ON_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
531 status_mask & ~PIPESTAT_INT_STATUS_MASK))
534 if ((pipestat & enable_mask) == 0)
537 dev_priv->pipestat_irq_mask[pipe] &= ~status_mask;
539 pipestat &= ~enable_mask;
540 I915_WRITE(reg, pipestat);
544 static u32 vlv_get_pipestat_enable_mask(struct drm_device *dev, u32 status_mask)
546 u32 enable_mask = status_mask << 16;
549 * On pipe A we don't support the PSR interrupt yet, on pipe B the
552 if (WARN_ON_ONCE(status_mask & PIPE_A_PSR_STATUS_VLV))
555 enable_mask &= ~(PIPE_FIFO_UNDERRUN_STATUS |
556 SPRITE0_FLIP_DONE_INT_EN_VLV |
557 SPRITE1_FLIP_DONE_INT_EN_VLV);
558 if (status_mask & SPRITE0_FLIP_DONE_INT_STATUS_VLV)
559 enable_mask |= SPRITE0_FLIP_DONE_INT_EN_VLV;
560 if (status_mask & SPRITE1_FLIP_DONE_INT_STATUS_VLV)
561 enable_mask |= SPRITE1_FLIP_DONE_INT_EN_VLV;
567 i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
572 if (IS_VALLEYVIEW(dev_priv->dev))
573 enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev,
576 enable_mask = status_mask << 16;
577 __i915_enable_pipestat(dev_priv, pipe, enable_mask, status_mask);
581 i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
586 if (IS_VALLEYVIEW(dev_priv->dev))
587 enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev,
590 enable_mask = status_mask << 16;
591 __i915_disable_pipestat(dev_priv, pipe, enable_mask, status_mask);
595 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
597 static void i915_enable_asle_pipestat(struct drm_device *dev)
599 struct drm_i915_private *dev_priv = dev->dev_private;
600 unsigned long irqflags;
602 if (!dev_priv->opregion.asle || !IS_MOBILE(dev))
605 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
607 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_STATUS);
608 if (INTEL_INFO(dev)->gen >= 4)
609 i915_enable_pipestat(dev_priv, PIPE_A,
610 PIPE_LEGACY_BLC_EVENT_STATUS);
612 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
616 * i915_pipe_enabled - check if a pipe is enabled
618 * @pipe: pipe to check
620 * Reading certain registers when the pipe is disabled can hang the chip.
621 * Use this routine to make sure the PLL is running and the pipe is active
622 * before reading such registers if unsure.
625 i915_pipe_enabled(struct drm_device *dev, int pipe)
627 struct drm_i915_private *dev_priv = dev->dev_private;
629 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
630 /* Locking is horribly broken here, but whatever. */
631 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
632 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
634 return intel_crtc->active;
636 return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
640 static u32 i8xx_get_vblank_counter(struct drm_device *dev, int pipe)
642 /* Gen2 doesn't have a hardware frame counter */
646 /* Called from drm generic code, passed a 'crtc', which
647 * we use as a pipe index
649 static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
651 struct drm_i915_private *dev_priv = dev->dev_private;
652 unsigned long high_frame;
653 unsigned long low_frame;
654 u32 high1, high2, low, pixel, vbl_start;
656 if (!i915_pipe_enabled(dev, pipe)) {
657 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
658 "pipe %c\n", pipe_name(pipe));
662 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
663 struct intel_crtc *intel_crtc =
664 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
665 const struct drm_display_mode *mode =
666 &intel_crtc->config.adjusted_mode;
668 vbl_start = mode->crtc_vblank_start * mode->crtc_htotal;
670 enum transcoder cpu_transcoder = (enum transcoder) pipe;
673 htotal = ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff) + 1;
674 vbl_start = (I915_READ(VBLANK(cpu_transcoder)) & 0x1fff) + 1;
679 high_frame = PIPEFRAME(pipe);
680 low_frame = PIPEFRAMEPIXEL(pipe);
683 * High & low register fields aren't synchronized, so make sure
684 * we get a low value that's stable across two reads of the high
688 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
689 low = I915_READ(low_frame);
690 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
691 } while (high1 != high2);
693 high1 >>= PIPE_FRAME_HIGH_SHIFT;
694 pixel = low & PIPE_PIXEL_MASK;
695 low >>= PIPE_FRAME_LOW_SHIFT;
698 * The frame counter increments at beginning of active.
699 * Cook up a vblank counter by also checking the pixel
700 * counter against vblank start.
702 return (((high1 << 8) | low) + (pixel >= vbl_start)) & 0xffffff;
705 static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
707 struct drm_i915_private *dev_priv = dev->dev_private;
708 int reg = PIPE_FRMCOUNT_GM45(pipe);
710 if (!i915_pipe_enabled(dev, pipe)) {
711 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
712 "pipe %c\n", pipe_name(pipe));
716 return I915_READ(reg);
719 /* raw reads, only for fast reads of display block, no need for forcewake etc. */
720 #define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
722 static bool ilk_pipe_in_vblank_locked(struct drm_device *dev, enum pipe pipe)
724 struct drm_i915_private *dev_priv = dev->dev_private;
728 if (INTEL_INFO(dev)->gen >= 8) {
729 status = GEN8_PIPE_VBLANK;
730 reg = GEN8_DE_PIPE_ISR(pipe);
731 } else if (INTEL_INFO(dev)->gen >= 7) {
732 status = DE_PIPE_VBLANK_IVB(pipe);
735 status = DE_PIPE_VBLANK(pipe);
739 return __raw_i915_read32(dev_priv, reg) & status;
742 static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
743 unsigned int flags, int *vpos, int *hpos,
744 ktime_t *stime, ktime_t *etime)
746 struct drm_i915_private *dev_priv = dev->dev_private;
747 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
748 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
749 const struct drm_display_mode *mode = &intel_crtc->config.adjusted_mode;
751 int vbl_start, vbl_end, htotal, vtotal;
754 unsigned long irqflags;
756 if (!intel_crtc->active) {
757 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
758 "pipe %c\n", pipe_name(pipe));
762 htotal = mode->crtc_htotal;
763 vtotal = mode->crtc_vtotal;
764 vbl_start = mode->crtc_vblank_start;
765 vbl_end = mode->crtc_vblank_end;
767 if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
768 vbl_start = DIV_ROUND_UP(vbl_start, 2);
773 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
776 * Lock uncore.lock, as we will do multiple timing critical raw
777 * register reads, potentially with preemption disabled, so the
778 * following code must not block on uncore.lock.
780 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
782 /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
784 /* Get optional system timestamp before query. */
786 *stime = ktime_get();
788 if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
789 /* No obvious pixelcount register. Only query vertical
790 * scanout position from Display scan line register.
793 position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN2;
795 position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
799 * On HSW HDMI outputs there seems to be a 2 line
800 * difference, whereas eDP has the normal 1 line
801 * difference that earlier platforms have. External
802 * DP is unknown. For now just check for the 2 line
803 * difference case on all output types on HSW+.
805 * This might misinterpret the scanline counter being
806 * one line too far along on eDP, but that's less
807 * dangerous than the alternative since that would lead
808 * the vblank timestamp code astray when it sees a
809 * scanline count before vblank_start during a vblank
812 in_vbl = ilk_pipe_in_vblank_locked(dev, pipe);
813 if ((in_vbl && (position == vbl_start - 2 ||
814 position == vbl_start - 1)) ||
815 (!in_vbl && (position == vbl_end - 2 ||
816 position == vbl_end - 1)))
817 position = (position + 2) % vtotal;
818 } else if (HAS_PCH_SPLIT(dev)) {
820 * The scanline counter increments at the leading edge
821 * of hsync, ie. it completely misses the active portion
822 * of the line. Fix up the counter at both edges of vblank
823 * to get a more accurate picture whether we're in vblank
826 in_vbl = ilk_pipe_in_vblank_locked(dev, pipe);
827 if ((in_vbl && position == vbl_start - 1) ||
828 (!in_vbl && position == vbl_end - 1))
829 position = (position + 1) % vtotal;
832 * ISR vblank status bits don't work the way we'd want
833 * them to work on non-PCH platforms (for
834 * ilk_pipe_in_vblank_locked()), and there doesn't
835 * appear any other way to determine if we're currently
838 * Instead let's assume that we're already in vblank if
839 * we got called from the vblank interrupt and the
840 * scanline counter value indicates that we're on the
841 * line just prior to vblank start. This should result
842 * in the correct answer, unless the vblank interrupt
843 * delivery really got delayed for almost exactly one
846 if (flags & DRM_CALLED_FROM_VBLIRQ &&
847 position == vbl_start - 1) {
848 position = (position + 1) % vtotal;
850 /* Signal this correction as "applied". */
855 /* Have access to pixelcount since start of frame.
856 * We can split this into vertical and horizontal
859 position = (__raw_i915_read32(dev_priv, PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
861 /* convert to pixel counts */
867 /* Get optional system timestamp after query. */
869 *etime = ktime_get();
871 /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
873 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
875 in_vbl = position >= vbl_start && position < vbl_end;
878 * While in vblank, position will be negative
879 * counting up towards 0 at vbl_end. And outside
880 * vblank, position will be positive counting
883 if (position >= vbl_start)
886 position += vtotal - vbl_end;
888 if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
892 *vpos = position / htotal;
893 *hpos = position - (*vpos * htotal);
898 ret |= DRM_SCANOUTPOS_INVBL;
903 static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
905 struct timeval *vblank_time,
908 struct drm_crtc *crtc;
910 if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) {
911 DRM_ERROR("Invalid crtc %d\n", pipe);
915 /* Get drm_crtc to timestamp: */
916 crtc = intel_get_crtc_for_pipe(dev, pipe);
918 DRM_ERROR("Invalid crtc %d\n", pipe);
922 if (!crtc->enabled) {
923 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
927 /* Helper routine in DRM core does all the work: */
928 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
931 &to_intel_crtc(crtc)->config.adjusted_mode);
934 static bool intel_hpd_irq_event(struct drm_device *dev,
935 struct drm_connector *connector)
937 enum drm_connector_status old_status;
939 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
940 old_status = connector->status;
942 connector->status = connector->funcs->detect(connector, false);
943 if (old_status == connector->status)
946 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
948 drm_get_connector_name(connector),
949 drm_get_connector_status_name(old_status),
950 drm_get_connector_status_name(connector->status));
956 * Handle hotplug events outside the interrupt handler proper.
958 #define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
960 static void i915_hotplug_work_func(struct work_struct *work)
962 struct drm_i915_private *dev_priv =
963 container_of(work, struct drm_i915_private, hotplug_work);
964 struct drm_device *dev = dev_priv->dev;
965 struct drm_mode_config *mode_config = &dev->mode_config;
966 struct intel_connector *intel_connector;
967 struct intel_encoder *intel_encoder;
968 struct drm_connector *connector;
969 unsigned long irqflags;
970 bool hpd_disabled = false;
971 bool changed = false;
974 /* HPD irq before everything is fully set up. */
975 if (!dev_priv->enable_hotplug_processing)
978 mutex_lock(&mode_config->mutex);
979 DRM_DEBUG_KMS("running encoder hotplug functions\n");
981 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
983 hpd_event_bits = dev_priv->hpd_event_bits;
984 dev_priv->hpd_event_bits = 0;
985 list_for_each_entry(connector, &mode_config->connector_list, head) {
986 intel_connector = to_intel_connector(connector);
987 intel_encoder = intel_connector->encoder;
988 if (intel_encoder->hpd_pin > HPD_NONE &&
989 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
990 connector->polled == DRM_CONNECTOR_POLL_HPD) {
991 DRM_INFO("HPD interrupt storm detected on connector %s: "
992 "switching from hotplug detection to polling\n",
993 drm_get_connector_name(connector));
994 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED;
995 connector->polled = DRM_CONNECTOR_POLL_CONNECT
996 | DRM_CONNECTOR_POLL_DISCONNECT;
999 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
1000 DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
1001 drm_get_connector_name(connector), intel_encoder->hpd_pin);
1004 /* if there were no outputs to poll, poll was disabled,
1005 * therefore make sure it's enabled when disabling HPD on
1006 * some connectors */
1008 drm_kms_helper_poll_enable(dev);
1009 mod_timer(&dev_priv->hotplug_reenable_timer,
1010 jiffies + msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY));
1013 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1015 list_for_each_entry(connector, &mode_config->connector_list, head) {
1016 intel_connector = to_intel_connector(connector);
1017 intel_encoder = intel_connector->encoder;
1018 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
1019 if (intel_encoder->hot_plug)
1020 intel_encoder->hot_plug(intel_encoder);
1021 if (intel_hpd_irq_event(dev, connector))
1025 mutex_unlock(&mode_config->mutex);
1028 drm_kms_helper_hotplug_event(dev);
1031 static void intel_hpd_irq_uninstall(struct drm_i915_private *dev_priv)
1033 del_timer_sync(&dev_priv->hotplug_reenable_timer);
1036 static void ironlake_rps_change_irq_handler(struct drm_device *dev)
1038 struct drm_i915_private *dev_priv = dev->dev_private;
1039 u32 busy_up, busy_down, max_avg, min_avg;
1042 spin_lock(&mchdev_lock);
1044 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
1046 new_delay = dev_priv->ips.cur_delay;
1048 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
1049 busy_up = I915_READ(RCPREVBSYTUPAVG);
1050 busy_down = I915_READ(RCPREVBSYTDNAVG);
1051 max_avg = I915_READ(RCBMAXAVG);
1052 min_avg = I915_READ(RCBMINAVG);
1054 /* Handle RCS change request from hw */
1055 if (busy_up > max_avg) {
1056 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
1057 new_delay = dev_priv->ips.cur_delay - 1;
1058 if (new_delay < dev_priv->ips.max_delay)
1059 new_delay = dev_priv->ips.max_delay;
1060 } else if (busy_down < min_avg) {
1061 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
1062 new_delay = dev_priv->ips.cur_delay + 1;
1063 if (new_delay > dev_priv->ips.min_delay)
1064 new_delay = dev_priv->ips.min_delay;
1067 if (ironlake_set_drps(dev, new_delay))
1068 dev_priv->ips.cur_delay = new_delay;
1070 spin_unlock(&mchdev_lock);
1075 static void notify_ring(struct drm_device *dev,
1076 struct intel_ring_buffer *ring)
1078 if (ring->obj == NULL)
1081 trace_i915_gem_request_complete(ring);
1083 wake_up_all(&ring->irq_queue);
1084 i915_queue_hangcheck(dev);
1087 static void gen6_pm_rps_work(struct work_struct *work)
1089 struct drm_i915_private *dev_priv =
1090 container_of(work, struct drm_i915_private, rps.work);
1094 spin_lock_irq(&dev_priv->irq_lock);
1095 pm_iir = dev_priv->rps.pm_iir;
1096 dev_priv->rps.pm_iir = 0;
1097 /* Make sure not to corrupt PMIMR state used by ringbuffer code */
1098 snb_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
1099 spin_unlock_irq(&dev_priv->irq_lock);
1101 /* Make sure we didn't queue anything we're not going to process. */
1102 WARN_ON(pm_iir & ~dev_priv->pm_rps_events);
1104 if ((pm_iir & dev_priv->pm_rps_events) == 0)
1107 mutex_lock(&dev_priv->rps.hw_lock);
1109 adj = dev_priv->rps.last_adj;
1110 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
1115 new_delay = dev_priv->rps.cur_freq + adj;
1118 * For better performance, jump directly
1119 * to RPe if we're below it.
1121 if (new_delay < dev_priv->rps.efficient_freq)
1122 new_delay = dev_priv->rps.efficient_freq;
1123 } else if (pm_iir & GEN6_PM_RP_DOWN_TIMEOUT) {
1124 if (dev_priv->rps.cur_freq > dev_priv->rps.efficient_freq)
1125 new_delay = dev_priv->rps.efficient_freq;
1127 new_delay = dev_priv->rps.min_freq_softlimit;
1129 } else if (pm_iir & GEN6_PM_RP_DOWN_THRESHOLD) {
1134 new_delay = dev_priv->rps.cur_freq + adj;
1135 } else { /* unknown event */
1136 new_delay = dev_priv->rps.cur_freq;
1139 /* sysfs frequency interfaces may have snuck in while servicing the
1142 new_delay = clamp_t(int, new_delay,
1143 dev_priv->rps.min_freq_softlimit,
1144 dev_priv->rps.max_freq_softlimit);
1146 dev_priv->rps.last_adj = new_delay - dev_priv->rps.cur_freq;
1148 if (IS_VALLEYVIEW(dev_priv->dev))
1149 valleyview_set_rps(dev_priv->dev, new_delay);
1151 gen6_set_rps(dev_priv->dev, new_delay);
1153 mutex_unlock(&dev_priv->rps.hw_lock);
1158 * ivybridge_parity_work - Workqueue called when a parity error interrupt
1160 * @work: workqueue struct
1162 * Doesn't actually do anything except notify userspace. As a consequence of
1163 * this event, userspace should try to remap the bad rows since statistically
1164 * it is likely the same row is more likely to go bad again.
1166 static void ivybridge_parity_work(struct work_struct *work)
1168 struct drm_i915_private *dev_priv =
1169 container_of(work, struct drm_i915_private, l3_parity.error_work);
1170 u32 error_status, row, bank, subbank;
1171 char *parity_event[6];
1173 unsigned long flags;
1176 /* We must turn off DOP level clock gating to access the L3 registers.
1177 * In order to prevent a get/put style interface, acquire struct mutex
1178 * any time we access those registers.
1180 mutex_lock(&dev_priv->dev->struct_mutex);
1182 /* If we've screwed up tracking, just let the interrupt fire again */
1183 if (WARN_ON(!dev_priv->l3_parity.which_slice))
1186 misccpctl = I915_READ(GEN7_MISCCPCTL);
1187 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
1188 POSTING_READ(GEN7_MISCCPCTL);
1190 while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) {
1194 if (WARN_ON_ONCE(slice >= NUM_L3_SLICES(dev_priv->dev)))
1197 dev_priv->l3_parity.which_slice &= ~(1<<slice);
1199 reg = GEN7_L3CDERRST1 + (slice * 0x200);
1201 error_status = I915_READ(reg);
1202 row = GEN7_PARITY_ERROR_ROW(error_status);
1203 bank = GEN7_PARITY_ERROR_BANK(error_status);
1204 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
1206 I915_WRITE(reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE);
1209 parity_event[0] = I915_L3_PARITY_UEVENT "=1";
1210 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
1211 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
1212 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
1213 parity_event[4] = kasprintf(GFP_KERNEL, "SLICE=%d", slice);
1214 parity_event[5] = NULL;
1216 kobject_uevent_env(&dev_priv->dev->primary->kdev->kobj,
1217 KOBJ_CHANGE, parity_event);
1219 DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n",
1220 slice, row, bank, subbank);
1222 kfree(parity_event[4]);
1223 kfree(parity_event[3]);
1224 kfree(parity_event[2]);
1225 kfree(parity_event[1]);
1228 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
1231 WARN_ON(dev_priv->l3_parity.which_slice);
1232 spin_lock_irqsave(&dev_priv->irq_lock, flags);
1233 ilk_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv->dev));
1234 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
1236 mutex_unlock(&dev_priv->dev->struct_mutex);
1239 static void ivybridge_parity_error_irq_handler(struct drm_device *dev, u32 iir)
1241 struct drm_i915_private *dev_priv = dev->dev_private;
1243 if (!HAS_L3_DPF(dev))
1246 spin_lock(&dev_priv->irq_lock);
1247 ilk_disable_gt_irq(dev_priv, GT_PARITY_ERROR(dev));
1248 spin_unlock(&dev_priv->irq_lock);
1250 iir &= GT_PARITY_ERROR(dev);
1251 if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1)
1252 dev_priv->l3_parity.which_slice |= 1 << 1;
1254 if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
1255 dev_priv->l3_parity.which_slice |= 1 << 0;
1257 queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
1260 static void ilk_gt_irq_handler(struct drm_device *dev,
1261 struct drm_i915_private *dev_priv,
1265 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1266 notify_ring(dev, &dev_priv->ring[RCS]);
1267 if (gt_iir & ILK_BSD_USER_INTERRUPT)
1268 notify_ring(dev, &dev_priv->ring[VCS]);
1271 static void snb_gt_irq_handler(struct drm_device *dev,
1272 struct drm_i915_private *dev_priv,
1277 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1278 notify_ring(dev, &dev_priv->ring[RCS]);
1279 if (gt_iir & GT_BSD_USER_INTERRUPT)
1280 notify_ring(dev, &dev_priv->ring[VCS]);
1281 if (gt_iir & GT_BLT_USER_INTERRUPT)
1282 notify_ring(dev, &dev_priv->ring[BCS]);
1284 if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
1285 GT_BSD_CS_ERROR_INTERRUPT |
1286 GT_RENDER_CS_MASTER_ERROR_INTERRUPT)) {
1287 i915_handle_error(dev, false, "GT error interrupt 0x%08x",
1291 if (gt_iir & GT_PARITY_ERROR(dev))
1292 ivybridge_parity_error_irq_handler(dev, gt_iir);
1295 static irqreturn_t gen8_gt_irq_handler(struct drm_device *dev,
1296 struct drm_i915_private *dev_priv,
1301 irqreturn_t ret = IRQ_NONE;
1303 if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
1304 tmp = I915_READ(GEN8_GT_IIR(0));
1307 rcs = tmp >> GEN8_RCS_IRQ_SHIFT;
1308 bcs = tmp >> GEN8_BCS_IRQ_SHIFT;
1309 if (rcs & GT_RENDER_USER_INTERRUPT)
1310 notify_ring(dev, &dev_priv->ring[RCS]);
1311 if (bcs & GT_RENDER_USER_INTERRUPT)
1312 notify_ring(dev, &dev_priv->ring[BCS]);
1313 I915_WRITE(GEN8_GT_IIR(0), tmp);
1315 DRM_ERROR("The master control interrupt lied (GT0)!\n");
1318 if (master_ctl & GEN8_GT_VCS1_IRQ) {
1319 tmp = I915_READ(GEN8_GT_IIR(1));
1322 vcs = tmp >> GEN8_VCS1_IRQ_SHIFT;
1323 if (vcs & GT_RENDER_USER_INTERRUPT)
1324 notify_ring(dev, &dev_priv->ring[VCS]);
1325 I915_WRITE(GEN8_GT_IIR(1), tmp);
1327 DRM_ERROR("The master control interrupt lied (GT1)!\n");
1330 if (master_ctl & GEN8_GT_VECS_IRQ) {
1331 tmp = I915_READ(GEN8_GT_IIR(3));
1334 vcs = tmp >> GEN8_VECS_IRQ_SHIFT;
1335 if (vcs & GT_RENDER_USER_INTERRUPT)
1336 notify_ring(dev, &dev_priv->ring[VECS]);
1337 I915_WRITE(GEN8_GT_IIR(3), tmp);
1339 DRM_ERROR("The master control interrupt lied (GT3)!\n");
1345 #define HPD_STORM_DETECT_PERIOD 1000
1346 #define HPD_STORM_THRESHOLD 5
1348 static inline void intel_hpd_irq_handler(struct drm_device *dev,
1349 u32 hotplug_trigger,
1352 struct drm_i915_private *dev_priv = dev->dev_private;
1354 bool storm_detected = false;
1356 if (!hotplug_trigger)
1359 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
1362 spin_lock(&dev_priv->irq_lock);
1363 for (i = 1; i < HPD_NUM_PINS; i++) {
1365 WARN_ONCE(hpd[i] & hotplug_trigger &&
1366 dev_priv->hpd_stats[i].hpd_mark == HPD_DISABLED,
1367 "Received HPD interrupt (0x%08x) on pin %d (0x%08x) although disabled\n",
1368 hotplug_trigger, i, hpd[i]);
1370 if (!(hpd[i] & hotplug_trigger) ||
1371 dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
1374 dev_priv->hpd_event_bits |= (1 << i);
1375 if (!time_in_range(jiffies, dev_priv->hpd_stats[i].hpd_last_jiffies,
1376 dev_priv->hpd_stats[i].hpd_last_jiffies
1377 + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) {
1378 dev_priv->hpd_stats[i].hpd_last_jiffies = jiffies;
1379 dev_priv->hpd_stats[i].hpd_cnt = 0;
1380 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: 0\n", i);
1381 } else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) {
1382 dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
1383 dev_priv->hpd_event_bits &= ~(1 << i);
1384 DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
1385 storm_detected = true;
1387 dev_priv->hpd_stats[i].hpd_cnt++;
1388 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n", i,
1389 dev_priv->hpd_stats[i].hpd_cnt);
1394 dev_priv->display.hpd_irq_setup(dev);
1395 spin_unlock(&dev_priv->irq_lock);
1398 * Our hotplug handler can grab modeset locks (by calling down into the
1399 * fb helpers). Hence it must not be run on our own dev-priv->wq work
1400 * queue for otherwise the flush_work in the pageflip code will
1403 schedule_work(&dev_priv->hotplug_work);
1406 static void gmbus_irq_handler(struct drm_device *dev)
1408 struct drm_i915_private *dev_priv = dev->dev_private;
1410 wake_up_all(&dev_priv->gmbus_wait_queue);
1413 static void dp_aux_irq_handler(struct drm_device *dev)
1415 struct drm_i915_private *dev_priv = dev->dev_private;
1417 wake_up_all(&dev_priv->gmbus_wait_queue);
1420 #if defined(CONFIG_DEBUG_FS)
1421 static void display_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe,
1422 uint32_t crc0, uint32_t crc1,
1423 uint32_t crc2, uint32_t crc3,
1426 struct drm_i915_private *dev_priv = dev->dev_private;
1427 struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
1428 struct intel_pipe_crc_entry *entry;
1431 spin_lock(&pipe_crc->lock);
1433 if (!pipe_crc->entries) {
1434 spin_unlock(&pipe_crc->lock);
1435 DRM_ERROR("spurious interrupt\n");
1439 head = pipe_crc->head;
1440 tail = pipe_crc->tail;
1442 if (CIRC_SPACE(head, tail, INTEL_PIPE_CRC_ENTRIES_NR) < 1) {
1443 spin_unlock(&pipe_crc->lock);
1444 DRM_ERROR("CRC buffer overflowing\n");
1448 entry = &pipe_crc->entries[head];
1450 entry->frame = dev->driver->get_vblank_counter(dev, pipe);
1451 entry->crc[0] = crc0;
1452 entry->crc[1] = crc1;
1453 entry->crc[2] = crc2;
1454 entry->crc[3] = crc3;
1455 entry->crc[4] = crc4;
1457 head = (head + 1) & (INTEL_PIPE_CRC_ENTRIES_NR - 1);
1458 pipe_crc->head = head;
1460 spin_unlock(&pipe_crc->lock);
1462 wake_up_interruptible(&pipe_crc->wq);
1466 display_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe,
1467 uint32_t crc0, uint32_t crc1,
1468 uint32_t crc2, uint32_t crc3,
1473 static void hsw_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe)
1475 struct drm_i915_private *dev_priv = dev->dev_private;
1477 display_pipe_crc_irq_handler(dev, pipe,
1478 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1482 static void ivb_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe)
1484 struct drm_i915_private *dev_priv = dev->dev_private;
1486 display_pipe_crc_irq_handler(dev, pipe,
1487 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1488 I915_READ(PIPE_CRC_RES_2_IVB(pipe)),
1489 I915_READ(PIPE_CRC_RES_3_IVB(pipe)),
1490 I915_READ(PIPE_CRC_RES_4_IVB(pipe)),
1491 I915_READ(PIPE_CRC_RES_5_IVB(pipe)));
1494 static void i9xx_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe)
1496 struct drm_i915_private *dev_priv = dev->dev_private;
1497 uint32_t res1, res2;
1499 if (INTEL_INFO(dev)->gen >= 3)
1500 res1 = I915_READ(PIPE_CRC_RES_RES1_I915(pipe));
1504 if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev))
1505 res2 = I915_READ(PIPE_CRC_RES_RES2_G4X(pipe));
1509 display_pipe_crc_irq_handler(dev, pipe,
1510 I915_READ(PIPE_CRC_RES_RED(pipe)),
1511 I915_READ(PIPE_CRC_RES_GREEN(pipe)),
1512 I915_READ(PIPE_CRC_RES_BLUE(pipe)),
1516 /* The RPS events need forcewake, so we add them to a work queue and mask their
1517 * IMR bits until the work is done. Other interrupts can be processed without
1518 * the work queue. */
1519 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
1521 if (pm_iir & dev_priv->pm_rps_events) {
1522 spin_lock(&dev_priv->irq_lock);
1523 dev_priv->rps.pm_iir |= pm_iir & dev_priv->pm_rps_events;
1524 snb_disable_pm_irq(dev_priv, pm_iir & dev_priv->pm_rps_events);
1525 spin_unlock(&dev_priv->irq_lock);
1527 queue_work(dev_priv->wq, &dev_priv->rps.work);
1530 if (HAS_VEBOX(dev_priv->dev)) {
1531 if (pm_iir & PM_VEBOX_USER_INTERRUPT)
1532 notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
1534 if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) {
1535 i915_handle_error(dev_priv->dev, false,
1536 "VEBOX CS error interrupt 0x%08x",
1542 static void valleyview_pipestat_irq_handler(struct drm_device *dev, u32 iir)
1544 struct drm_i915_private *dev_priv = dev->dev_private;
1545 u32 pipe_stats[I915_MAX_PIPES] = { };
1548 spin_lock(&dev_priv->irq_lock);
1549 for_each_pipe(pipe) {
1551 u32 mask, iir_bit = 0;
1554 * PIPESTAT bits get signalled even when the interrupt is
1555 * disabled with the mask bits, and some of the status bits do
1556 * not generate interrupts at all (like the underrun bit). Hence
1557 * we need to be careful that we only handle what we want to
1561 if (__cpu_fifo_underrun_reporting_enabled(dev, pipe))
1562 mask |= PIPE_FIFO_UNDERRUN_STATUS;
1566 iir_bit = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
1569 iir_bit = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
1573 mask |= dev_priv->pipestat_irq_mask[pipe];
1578 reg = PIPESTAT(pipe);
1579 mask |= PIPESTAT_INT_ENABLE_MASK;
1580 pipe_stats[pipe] = I915_READ(reg) & mask;
1583 * Clear the PIPE*STAT regs before the IIR
1585 if (pipe_stats[pipe] & (PIPE_FIFO_UNDERRUN_STATUS |
1586 PIPESTAT_INT_STATUS_MASK))
1587 I915_WRITE(reg, pipe_stats[pipe]);
1589 spin_unlock(&dev_priv->irq_lock);
1591 for_each_pipe(pipe) {
1592 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS)
1593 drm_handle_vblank(dev, pipe);
1595 if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV) {
1596 intel_prepare_page_flip(dev, pipe);
1597 intel_finish_page_flip(dev, pipe);
1600 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1601 i9xx_pipe_crc_irq_handler(dev, pipe);
1603 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS &&
1604 intel_set_cpu_fifo_underrun_reporting(dev, pipe, false))
1605 DRM_ERROR("pipe %c underrun\n", pipe_name(pipe));
1608 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
1609 gmbus_irq_handler(dev);
1612 static irqreturn_t valleyview_irq_handler(int irq, void *arg)
1614 struct drm_device *dev = (struct drm_device *) arg;
1615 struct drm_i915_private *dev_priv = dev->dev_private;
1616 u32 iir, gt_iir, pm_iir;
1617 irqreturn_t ret = IRQ_NONE;
1620 iir = I915_READ(VLV_IIR);
1621 gt_iir = I915_READ(GTIIR);
1622 pm_iir = I915_READ(GEN6_PMIIR);
1624 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
1629 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1631 valleyview_pipestat_irq_handler(dev, iir);
1633 /* Consume port. Then clear IIR or we'll miss events */
1634 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
1635 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
1636 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
1638 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
1640 if (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X)
1641 dp_aux_irq_handler(dev);
1643 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
1644 I915_READ(PORT_HOTPLUG_STAT);
1649 gen6_rps_irq_handler(dev_priv, pm_iir);
1651 I915_WRITE(GTIIR, gt_iir);
1652 I915_WRITE(GEN6_PMIIR, pm_iir);
1653 I915_WRITE(VLV_IIR, iir);
1660 static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
1662 struct drm_i915_private *dev_priv = dev->dev_private;
1664 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
1666 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx);
1668 if (pch_iir & SDE_AUDIO_POWER_MASK) {
1669 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
1670 SDE_AUDIO_POWER_SHIFT);
1671 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
1675 if (pch_iir & SDE_AUX_MASK)
1676 dp_aux_irq_handler(dev);
1678 if (pch_iir & SDE_GMBUS)
1679 gmbus_irq_handler(dev);
1681 if (pch_iir & SDE_AUDIO_HDCP_MASK)
1682 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1684 if (pch_iir & SDE_AUDIO_TRANS_MASK)
1685 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1687 if (pch_iir & SDE_POISON)
1688 DRM_ERROR("PCH poison interrupt\n");
1690 if (pch_iir & SDE_FDI_MASK)
1692 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1694 I915_READ(FDI_RX_IIR(pipe)));
1696 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
1697 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1699 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
1700 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
1702 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
1703 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1705 DRM_ERROR("PCH transcoder A FIFO underrun\n");
1707 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
1708 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1710 DRM_ERROR("PCH transcoder B FIFO underrun\n");
1713 static void ivb_err_int_handler(struct drm_device *dev)
1715 struct drm_i915_private *dev_priv = dev->dev_private;
1716 u32 err_int = I915_READ(GEN7_ERR_INT);
1719 if (err_int & ERR_INT_POISON)
1720 DRM_ERROR("Poison interrupt\n");
1722 for_each_pipe(pipe) {
1723 if (err_int & ERR_INT_FIFO_UNDERRUN(pipe)) {
1724 if (intel_set_cpu_fifo_underrun_reporting(dev, pipe,
1726 DRM_ERROR("Pipe %c FIFO underrun\n",
1730 if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) {
1731 if (IS_IVYBRIDGE(dev))
1732 ivb_pipe_crc_irq_handler(dev, pipe);
1734 hsw_pipe_crc_irq_handler(dev, pipe);
1738 I915_WRITE(GEN7_ERR_INT, err_int);
1741 static void cpt_serr_int_handler(struct drm_device *dev)
1743 struct drm_i915_private *dev_priv = dev->dev_private;
1744 u32 serr_int = I915_READ(SERR_INT);
1746 if (serr_int & SERR_INT_POISON)
1747 DRM_ERROR("PCH poison interrupt\n");
1749 if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
1750 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1752 DRM_ERROR("PCH transcoder A FIFO underrun\n");
1754 if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
1755 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1757 DRM_ERROR("PCH transcoder B FIFO underrun\n");
1759 if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
1760 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_C,
1762 DRM_ERROR("PCH transcoder C FIFO underrun\n");
1764 I915_WRITE(SERR_INT, serr_int);
1767 static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
1769 struct drm_i915_private *dev_priv = dev->dev_private;
1771 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
1773 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt);
1775 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
1776 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
1777 SDE_AUDIO_POWER_SHIFT_CPT);
1778 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
1782 if (pch_iir & SDE_AUX_MASK_CPT)
1783 dp_aux_irq_handler(dev);
1785 if (pch_iir & SDE_GMBUS_CPT)
1786 gmbus_irq_handler(dev);
1788 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
1789 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
1791 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
1792 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
1794 if (pch_iir & SDE_FDI_MASK_CPT)
1796 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1798 I915_READ(FDI_RX_IIR(pipe)));
1800 if (pch_iir & SDE_ERROR_CPT)
1801 cpt_serr_int_handler(dev);
1804 static void ilk_display_irq_handler(struct drm_device *dev, u32 de_iir)
1806 struct drm_i915_private *dev_priv = dev->dev_private;
1809 if (de_iir & DE_AUX_CHANNEL_A)
1810 dp_aux_irq_handler(dev);
1812 if (de_iir & DE_GSE)
1813 intel_opregion_asle_intr(dev);
1815 if (de_iir & DE_POISON)
1816 DRM_ERROR("Poison interrupt\n");
1818 for_each_pipe(pipe) {
1819 if (de_iir & DE_PIPE_VBLANK(pipe))
1820 drm_handle_vblank(dev, pipe);
1822 if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe))
1823 if (intel_set_cpu_fifo_underrun_reporting(dev, pipe, false))
1824 DRM_ERROR("Pipe %c FIFO underrun\n",
1827 if (de_iir & DE_PIPE_CRC_DONE(pipe))
1828 i9xx_pipe_crc_irq_handler(dev, pipe);
1830 /* plane/pipes map 1:1 on ilk+ */
1831 if (de_iir & DE_PLANE_FLIP_DONE(pipe)) {
1832 intel_prepare_page_flip(dev, pipe);
1833 intel_finish_page_flip_plane(dev, pipe);
1837 /* check event from PCH */
1838 if (de_iir & DE_PCH_EVENT) {
1839 u32 pch_iir = I915_READ(SDEIIR);
1841 if (HAS_PCH_CPT(dev))
1842 cpt_irq_handler(dev, pch_iir);
1844 ibx_irq_handler(dev, pch_iir);
1846 /* should clear PCH hotplug event before clear CPU irq */
1847 I915_WRITE(SDEIIR, pch_iir);
1850 if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
1851 ironlake_rps_change_irq_handler(dev);
1854 static void ivb_display_irq_handler(struct drm_device *dev, u32 de_iir)
1856 struct drm_i915_private *dev_priv = dev->dev_private;
1859 if (de_iir & DE_ERR_INT_IVB)
1860 ivb_err_int_handler(dev);
1862 if (de_iir & DE_AUX_CHANNEL_A_IVB)
1863 dp_aux_irq_handler(dev);
1865 if (de_iir & DE_GSE_IVB)
1866 intel_opregion_asle_intr(dev);
1868 for_each_pipe(pipe) {
1869 if (de_iir & (DE_PIPE_VBLANK_IVB(pipe)))
1870 drm_handle_vblank(dev, pipe);
1872 /* plane/pipes map 1:1 on ilk+ */
1873 if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe)) {
1874 intel_prepare_page_flip(dev, pipe);
1875 intel_finish_page_flip_plane(dev, pipe);
1879 /* check event from PCH */
1880 if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
1881 u32 pch_iir = I915_READ(SDEIIR);
1883 cpt_irq_handler(dev, pch_iir);
1885 /* clear PCH hotplug event before clear CPU irq */
1886 I915_WRITE(SDEIIR, pch_iir);
1890 static irqreturn_t ironlake_irq_handler(int irq, void *arg)
1892 struct drm_device *dev = (struct drm_device *) arg;
1893 struct drm_i915_private *dev_priv = dev->dev_private;
1894 u32 de_iir, gt_iir, de_ier, sde_ier = 0;
1895 irqreturn_t ret = IRQ_NONE;
1897 /* We get interrupts on unclaimed registers, so check for this before we
1898 * do any I915_{READ,WRITE}. */
1899 intel_uncore_check_errors(dev);
1901 /* disable master interrupt before clearing iir */
1902 de_ier = I915_READ(DEIER);
1903 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
1904 POSTING_READ(DEIER);
1906 /* Disable south interrupts. We'll only write to SDEIIR once, so further
1907 * interrupts will will be stored on its back queue, and then we'll be
1908 * able to process them after we restore SDEIER (as soon as we restore
1909 * it, we'll get an interrupt if SDEIIR still has something to process
1910 * due to its back queue). */
1911 if (!HAS_PCH_NOP(dev)) {
1912 sde_ier = I915_READ(SDEIER);
1913 I915_WRITE(SDEIER, 0);
1914 POSTING_READ(SDEIER);
1917 gt_iir = I915_READ(GTIIR);
1919 if (INTEL_INFO(dev)->gen >= 6)
1920 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1922 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
1923 I915_WRITE(GTIIR, gt_iir);
1927 de_iir = I915_READ(DEIIR);
1929 if (INTEL_INFO(dev)->gen >= 7)
1930 ivb_display_irq_handler(dev, de_iir);
1932 ilk_display_irq_handler(dev, de_iir);
1933 I915_WRITE(DEIIR, de_iir);
1937 if (INTEL_INFO(dev)->gen >= 6) {
1938 u32 pm_iir = I915_READ(GEN6_PMIIR);
1940 gen6_rps_irq_handler(dev_priv, pm_iir);
1941 I915_WRITE(GEN6_PMIIR, pm_iir);
1946 I915_WRITE(DEIER, de_ier);
1947 POSTING_READ(DEIER);
1948 if (!HAS_PCH_NOP(dev)) {
1949 I915_WRITE(SDEIER, sde_ier);
1950 POSTING_READ(SDEIER);
1956 static irqreturn_t gen8_irq_handler(int irq, void *arg)
1958 struct drm_device *dev = arg;
1959 struct drm_i915_private *dev_priv = dev->dev_private;
1961 irqreturn_t ret = IRQ_NONE;
1965 master_ctl = I915_READ(GEN8_MASTER_IRQ);
1966 master_ctl &= ~GEN8_MASTER_IRQ_CONTROL;
1970 I915_WRITE(GEN8_MASTER_IRQ, 0);
1971 POSTING_READ(GEN8_MASTER_IRQ);
1973 ret = gen8_gt_irq_handler(dev, dev_priv, master_ctl);
1975 if (master_ctl & GEN8_DE_MISC_IRQ) {
1976 tmp = I915_READ(GEN8_DE_MISC_IIR);
1977 if (tmp & GEN8_DE_MISC_GSE)
1978 intel_opregion_asle_intr(dev);
1980 DRM_ERROR("Unexpected DE Misc interrupt\n");
1982 DRM_ERROR("The master control interrupt lied (DE MISC)!\n");
1985 I915_WRITE(GEN8_DE_MISC_IIR, tmp);
1990 if (master_ctl & GEN8_DE_PORT_IRQ) {
1991 tmp = I915_READ(GEN8_DE_PORT_IIR);
1992 if (tmp & GEN8_AUX_CHANNEL_A)
1993 dp_aux_irq_handler(dev);
1995 DRM_ERROR("Unexpected DE Port interrupt\n");
1997 DRM_ERROR("The master control interrupt lied (DE PORT)!\n");
2000 I915_WRITE(GEN8_DE_PORT_IIR, tmp);
2005 for_each_pipe(pipe) {
2008 if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe)))
2011 pipe_iir = I915_READ(GEN8_DE_PIPE_IIR(pipe));
2012 if (pipe_iir & GEN8_PIPE_VBLANK)
2013 drm_handle_vblank(dev, pipe);
2015 if (pipe_iir & GEN8_PIPE_FLIP_DONE) {
2016 intel_prepare_page_flip(dev, pipe);
2017 intel_finish_page_flip_plane(dev, pipe);
2020 if (pipe_iir & GEN8_PIPE_CDCLK_CRC_DONE)
2021 hsw_pipe_crc_irq_handler(dev, pipe);
2023 if (pipe_iir & GEN8_PIPE_FIFO_UNDERRUN) {
2024 if (intel_set_cpu_fifo_underrun_reporting(dev, pipe,
2026 DRM_ERROR("Pipe %c FIFO underrun\n",
2030 if (pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS) {
2031 DRM_ERROR("Fault errors on pipe %c\n: 0x%08x",
2033 pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS);
2038 I915_WRITE(GEN8_DE_PIPE_IIR(pipe), pipe_iir);
2040 DRM_ERROR("The master control interrupt lied (DE PIPE)!\n");
2043 if (!HAS_PCH_NOP(dev) && master_ctl & GEN8_DE_PCH_IRQ) {
2045 * FIXME(BDW): Assume for now that the new interrupt handling
2046 * scheme also closed the SDE interrupt handling race we've seen
2047 * on older pch-split platforms. But this needs testing.
2049 u32 pch_iir = I915_READ(SDEIIR);
2051 cpt_irq_handler(dev, pch_iir);
2054 I915_WRITE(SDEIIR, pch_iir);
2059 I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
2060 POSTING_READ(GEN8_MASTER_IRQ);
2065 static void i915_error_wake_up(struct drm_i915_private *dev_priv,
2066 bool reset_completed)
2068 struct intel_ring_buffer *ring;
2072 * Notify all waiters for GPU completion events that reset state has
2073 * been changed, and that they need to restart their wait after
2074 * checking for potential errors (and bail out to drop locks if there is
2075 * a gpu reset pending so that i915_error_work_func can acquire them).
2078 /* Wake up __wait_seqno, potentially holding dev->struct_mutex. */
2079 for_each_ring(ring, dev_priv, i)
2080 wake_up_all(&ring->irq_queue);
2082 /* Wake up intel_crtc_wait_for_pending_flips, holding crtc->mutex. */
2083 wake_up_all(&dev_priv->pending_flip_queue);
2086 * Signal tasks blocked in i915_gem_wait_for_error that the pending
2087 * reset state is cleared.
2089 if (reset_completed)
2090 wake_up_all(&dev_priv->gpu_error.reset_queue);
2094 * i915_error_work_func - do process context error handling work
2095 * @work: work struct
2097 * Fire an error uevent so userspace can see that a hang or error
2100 static void i915_error_work_func(struct work_struct *work)
2102 struct i915_gpu_error *error = container_of(work, struct i915_gpu_error,
2104 struct drm_i915_private *dev_priv =
2105 container_of(error, struct drm_i915_private, gpu_error);
2106 struct drm_device *dev = dev_priv->dev;
2107 char *error_event[] = { I915_ERROR_UEVENT "=1", NULL };
2108 char *reset_event[] = { I915_RESET_UEVENT "=1", NULL };
2109 char *reset_done_event[] = { I915_ERROR_UEVENT "=0", NULL };
2112 kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, error_event);
2115 * Note that there's only one work item which does gpu resets, so we
2116 * need not worry about concurrent gpu resets potentially incrementing
2117 * error->reset_counter twice. We only need to take care of another
2118 * racing irq/hangcheck declaring the gpu dead for a second time. A
2119 * quick check for that is good enough: schedule_work ensures the
2120 * correct ordering between hang detection and this work item, and since
2121 * the reset in-progress bit is only ever set by code outside of this
2122 * work we don't need to worry about any other races.
2124 if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) {
2125 DRM_DEBUG_DRIVER("resetting chip\n");
2126 kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE,
2130 * All state reset _must_ be completed before we update the
2131 * reset counter, for otherwise waiters might miss the reset
2132 * pending state and not properly drop locks, resulting in
2133 * deadlocks with the reset work.
2135 ret = i915_reset(dev);
2137 intel_display_handle_reset(dev);
2141 * After all the gem state is reset, increment the reset
2142 * counter and wake up everyone waiting for the reset to
2145 * Since unlock operations are a one-sided barrier only,
2146 * we need to insert a barrier here to order any seqno
2148 * the counter increment.
2150 smp_mb__before_atomic_inc();
2151 atomic_inc(&dev_priv->gpu_error.reset_counter);
2153 kobject_uevent_env(&dev->primary->kdev->kobj,
2154 KOBJ_CHANGE, reset_done_event);
2156 atomic_set_mask(I915_WEDGED, &error->reset_counter);
2160 * Note: The wake_up also serves as a memory barrier so that
2161 * waiters see the update value of the reset counter atomic_t.
2163 i915_error_wake_up(dev_priv, true);
2167 static void i915_report_and_clear_eir(struct drm_device *dev)
2169 struct drm_i915_private *dev_priv = dev->dev_private;
2170 uint32_t instdone[I915_NUM_INSTDONE_REG];
2171 u32 eir = I915_READ(EIR);
2177 pr_err("render error detected, EIR: 0x%08x\n", eir);
2179 i915_get_extra_instdone(dev, instdone);
2182 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
2183 u32 ipeir = I915_READ(IPEIR_I965);
2185 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2186 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2187 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2188 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2189 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2190 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2191 I915_WRITE(IPEIR_I965, ipeir);
2192 POSTING_READ(IPEIR_I965);
2194 if (eir & GM45_ERROR_PAGE_TABLE) {
2195 u32 pgtbl_err = I915_READ(PGTBL_ER);
2196 pr_err("page table error\n");
2197 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2198 I915_WRITE(PGTBL_ER, pgtbl_err);
2199 POSTING_READ(PGTBL_ER);
2203 if (!IS_GEN2(dev)) {
2204 if (eir & I915_ERROR_PAGE_TABLE) {
2205 u32 pgtbl_err = I915_READ(PGTBL_ER);
2206 pr_err("page table error\n");
2207 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2208 I915_WRITE(PGTBL_ER, pgtbl_err);
2209 POSTING_READ(PGTBL_ER);
2213 if (eir & I915_ERROR_MEMORY_REFRESH) {
2214 pr_err("memory refresh error:\n");
2216 pr_err("pipe %c stat: 0x%08x\n",
2217 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
2218 /* pipestat has already been acked */
2220 if (eir & I915_ERROR_INSTRUCTION) {
2221 pr_err("instruction error\n");
2222 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
2223 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2224 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2225 if (INTEL_INFO(dev)->gen < 4) {
2226 u32 ipeir = I915_READ(IPEIR);
2228 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
2229 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
2230 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
2231 I915_WRITE(IPEIR, ipeir);
2232 POSTING_READ(IPEIR);
2234 u32 ipeir = I915_READ(IPEIR_I965);
2236 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2237 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2238 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2239 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2240 I915_WRITE(IPEIR_I965, ipeir);
2241 POSTING_READ(IPEIR_I965);
2245 I915_WRITE(EIR, eir);
2247 eir = I915_READ(EIR);
2250 * some errors might have become stuck,
2253 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
2254 I915_WRITE(EMR, I915_READ(EMR) | eir);
2255 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2260 * i915_handle_error - handle an error interrupt
2263 * Do some basic checking of regsiter state at error interrupt time and
2264 * dump it to the syslog. Also call i915_capture_error_state() to make
2265 * sure we get a record and make it available in debugfs. Fire a uevent
2266 * so userspace knows something bad happened (should trigger collection
2267 * of a ring dump etc.).
2269 void i915_handle_error(struct drm_device *dev, bool wedged,
2270 const char *fmt, ...)
2272 struct drm_i915_private *dev_priv = dev->dev_private;
2276 va_start(args, fmt);
2277 vscnprintf(error_msg, sizeof(error_msg), fmt, args);
2280 i915_capture_error_state(dev, wedged, error_msg);
2281 i915_report_and_clear_eir(dev);
2284 atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG,
2285 &dev_priv->gpu_error.reset_counter);
2288 * Wakeup waiting processes so that the reset work function
2289 * i915_error_work_func doesn't deadlock trying to grab various
2290 * locks. By bumping the reset counter first, the woken
2291 * processes will see a reset in progress and back off,
2292 * releasing their locks and then wait for the reset completion.
2293 * We must do this for _all_ gpu waiters that might hold locks
2294 * that the reset work needs to acquire.
2296 * Note: The wake_up serves as the required memory barrier to
2297 * ensure that the waiters see the updated value of the reset
2300 i915_error_wake_up(dev_priv, false);
2304 * Our reset work can grab modeset locks (since it needs to reset the
2305 * state of outstanding pagelips). Hence it must not be run on our own
2306 * dev-priv->wq work queue for otherwise the flush_work in the pageflip
2307 * code will deadlock.
2309 schedule_work(&dev_priv->gpu_error.work);
2312 static void __always_unused i915_pageflip_stall_check(struct drm_device *dev, int pipe)
2314 struct drm_i915_private *dev_priv = dev->dev_private;
2315 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
2316 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2317 struct drm_i915_gem_object *obj;
2318 struct intel_unpin_work *work;
2319 unsigned long flags;
2320 bool stall_detected;
2322 /* Ignore early vblank irqs */
2323 if (intel_crtc == NULL)
2326 spin_lock_irqsave(&dev->event_lock, flags);
2327 work = intel_crtc->unpin_work;
2330 atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE ||
2331 !work->enable_stall_check) {
2332 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
2333 spin_unlock_irqrestore(&dev->event_lock, flags);
2337 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
2338 obj = work->pending_flip_obj;
2339 if (INTEL_INFO(dev)->gen >= 4) {
2340 int dspsurf = DSPSURF(intel_crtc->plane);
2341 stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
2342 i915_gem_obj_ggtt_offset(obj);
2344 int dspaddr = DSPADDR(intel_crtc->plane);
2345 stall_detected = I915_READ(dspaddr) == (i915_gem_obj_ggtt_offset(obj) +
2346 crtc->y * crtc->fb->pitches[0] +
2347 crtc->x * crtc->fb->bits_per_pixel/8);
2350 spin_unlock_irqrestore(&dev->event_lock, flags);
2352 if (stall_detected) {
2353 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
2354 intel_prepare_page_flip(dev, intel_crtc->plane);
2358 /* Called from drm generic code, passed 'crtc' which
2359 * we use as a pipe index
2361 static int i915_enable_vblank(struct drm_device *dev, int pipe)
2363 struct drm_i915_private *dev_priv = dev->dev_private;
2364 unsigned long irqflags;
2366 if (!i915_pipe_enabled(dev, pipe))
2369 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2370 if (INTEL_INFO(dev)->gen >= 4)
2371 i915_enable_pipestat(dev_priv, pipe,
2372 PIPE_START_VBLANK_INTERRUPT_STATUS);
2374 i915_enable_pipestat(dev_priv, pipe,
2375 PIPE_VBLANK_INTERRUPT_STATUS);
2377 /* maintain vblank delivery even in deep C-states */
2378 if (INTEL_INFO(dev)->gen == 3)
2379 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
2380 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2385 static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
2387 struct drm_i915_private *dev_priv = dev->dev_private;
2388 unsigned long irqflags;
2389 uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
2390 DE_PIPE_VBLANK(pipe);
2392 if (!i915_pipe_enabled(dev, pipe))
2395 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2396 ironlake_enable_display_irq(dev_priv, bit);
2397 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2402 static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
2404 struct drm_i915_private *dev_priv = dev->dev_private;
2405 unsigned long irqflags;
2407 if (!i915_pipe_enabled(dev, pipe))
2410 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2411 i915_enable_pipestat(dev_priv, pipe,
2412 PIPE_START_VBLANK_INTERRUPT_STATUS);
2413 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2418 static int gen8_enable_vblank(struct drm_device *dev, int pipe)
2420 struct drm_i915_private *dev_priv = dev->dev_private;
2421 unsigned long irqflags;
2423 if (!i915_pipe_enabled(dev, pipe))
2426 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2427 dev_priv->de_irq_mask[pipe] &= ~GEN8_PIPE_VBLANK;
2428 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
2429 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
2430 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2434 /* Called from drm generic code, passed 'crtc' which
2435 * we use as a pipe index
2437 static void i915_disable_vblank(struct drm_device *dev, int pipe)
2439 struct drm_i915_private *dev_priv = dev->dev_private;
2440 unsigned long irqflags;
2442 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2443 if (INTEL_INFO(dev)->gen == 3)
2444 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
2446 i915_disable_pipestat(dev_priv, pipe,
2447 PIPE_VBLANK_INTERRUPT_STATUS |
2448 PIPE_START_VBLANK_INTERRUPT_STATUS);
2449 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2452 static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
2454 struct drm_i915_private *dev_priv = dev->dev_private;
2455 unsigned long irqflags;
2456 uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
2457 DE_PIPE_VBLANK(pipe);
2459 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2460 ironlake_disable_display_irq(dev_priv, bit);
2461 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2464 static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
2466 struct drm_i915_private *dev_priv = dev->dev_private;
2467 unsigned long irqflags;
2469 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2470 i915_disable_pipestat(dev_priv, pipe,
2471 PIPE_START_VBLANK_INTERRUPT_STATUS);
2472 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2475 static void gen8_disable_vblank(struct drm_device *dev, int pipe)
2477 struct drm_i915_private *dev_priv = dev->dev_private;
2478 unsigned long irqflags;
2480 if (!i915_pipe_enabled(dev, pipe))
2483 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2484 dev_priv->de_irq_mask[pipe] |= GEN8_PIPE_VBLANK;
2485 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
2486 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
2487 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2491 ring_last_seqno(struct intel_ring_buffer *ring)
2493 return list_entry(ring->request_list.prev,
2494 struct drm_i915_gem_request, list)->seqno;
2498 ring_idle(struct intel_ring_buffer *ring, u32 seqno)
2500 return (list_empty(&ring->request_list) ||
2501 i915_seqno_passed(seqno, ring_last_seqno(ring)));
2505 ipehr_is_semaphore_wait(struct drm_device *dev, u32 ipehr)
2507 if (INTEL_INFO(dev)->gen >= 8) {
2509 * FIXME: gen8 semaphore support - currently we don't emit
2510 * semaphores on bdw anyway, but this needs to be addressed when
2511 * we merge that code.
2515 ipehr &= ~MI_SEMAPHORE_SYNC_MASK;
2516 return ipehr == (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE |
2517 MI_SEMAPHORE_REGISTER);
2521 static struct intel_ring_buffer *
2522 semaphore_wait_to_signaller_ring(struct intel_ring_buffer *ring, u32 ipehr)
2524 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2525 struct intel_ring_buffer *signaller;
2528 if (INTEL_INFO(dev_priv->dev)->gen >= 8) {
2530 * FIXME: gen8 semaphore support - currently we don't emit
2531 * semaphores on bdw anyway, but this needs to be addressed when
2532 * we merge that code.
2536 u32 sync_bits = ipehr & MI_SEMAPHORE_SYNC_MASK;
2538 for_each_ring(signaller, dev_priv, i) {
2539 if(ring == signaller)
2543 signaller->semaphore_register[ring->id])
2548 DRM_ERROR("No signaller ring found for ring %i, ipehr 0x%08x\n",
2554 static struct intel_ring_buffer *
2555 semaphore_waits_for(struct intel_ring_buffer *ring, u32 *seqno)
2557 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2558 u32 cmd, ipehr, head;
2561 ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
2562 if (!ipehr_is_semaphore_wait(ring->dev, ipehr))
2566 * HEAD is likely pointing to the dword after the actual command,
2567 * so scan backwards until we find the MBOX. But limit it to just 3
2568 * dwords. Note that we don't care about ACTHD here since that might
2569 * point at at batch, and semaphores are always emitted into the
2570 * ringbuffer itself.
2572 head = I915_READ_HEAD(ring) & HEAD_ADDR;
2574 for (i = 4; i; --i) {
2576 * Be paranoid and presume the hw has gone off into the wild -
2577 * our ring is smaller than what the hardware (and hence
2578 * HEAD_ADDR) allows. Also handles wrap-around.
2580 head &= ring->size - 1;
2582 /* This here seems to blow up */
2583 cmd = ioread32(ring->virtual_start + head);
2593 *seqno = ioread32(ring->virtual_start + head + 4) + 1;
2594 return semaphore_wait_to_signaller_ring(ring, ipehr);
2597 static int semaphore_passed(struct intel_ring_buffer *ring)
2599 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2600 struct intel_ring_buffer *signaller;
2603 ring->hangcheck.deadlock = true;
2605 signaller = semaphore_waits_for(ring, &seqno);
2606 if (signaller == NULL || signaller->hangcheck.deadlock)
2609 /* cursory check for an unkickable deadlock */
2610 ctl = I915_READ_CTL(signaller);
2611 if (ctl & RING_WAIT_SEMAPHORE && semaphore_passed(signaller) < 0)
2614 return i915_seqno_passed(signaller->get_seqno(signaller, false), seqno);
2617 static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv)
2619 struct intel_ring_buffer *ring;
2622 for_each_ring(ring, dev_priv, i)
2623 ring->hangcheck.deadlock = false;
2626 static enum intel_ring_hangcheck_action
2627 ring_stuck(struct intel_ring_buffer *ring, u64 acthd)
2629 struct drm_device *dev = ring->dev;
2630 struct drm_i915_private *dev_priv = dev->dev_private;
2633 if (ring->hangcheck.acthd != acthd)
2634 return HANGCHECK_ACTIVE;
2637 return HANGCHECK_HUNG;
2639 /* Is the chip hanging on a WAIT_FOR_EVENT?
2640 * If so we can simply poke the RB_WAIT bit
2641 * and break the hang. This should work on
2642 * all but the second generation chipsets.
2644 tmp = I915_READ_CTL(ring);
2645 if (tmp & RING_WAIT) {
2646 i915_handle_error(dev, false,
2647 "Kicking stuck wait on %s",
2649 I915_WRITE_CTL(ring, tmp);
2650 return HANGCHECK_KICK;
2653 if (INTEL_INFO(dev)->gen >= 6 && tmp & RING_WAIT_SEMAPHORE) {
2654 switch (semaphore_passed(ring)) {
2656 return HANGCHECK_HUNG;
2658 i915_handle_error(dev, false,
2659 "Kicking stuck semaphore on %s",
2661 I915_WRITE_CTL(ring, tmp);
2662 return HANGCHECK_KICK;
2664 return HANGCHECK_WAIT;
2668 return HANGCHECK_HUNG;
2672 * This is called when the chip hasn't reported back with completed
2673 * batchbuffers in a long time. We keep track per ring seqno progress and
2674 * if there are no progress, hangcheck score for that ring is increased.
2675 * Further, acthd is inspected to see if the ring is stuck. On stuck case
2676 * we kick the ring. If we see no progress on three subsequent calls
2677 * we assume chip is wedged and try to fix it by resetting the chip.
2679 static void i915_hangcheck_elapsed(unsigned long data)
2681 struct drm_device *dev = (struct drm_device *)data;
2682 struct drm_i915_private *dev_priv = dev->dev_private;
2683 struct intel_ring_buffer *ring;
2685 int busy_count = 0, rings_hung = 0;
2686 bool stuck[I915_NUM_RINGS] = { 0 };
2691 if (!i915.enable_hangcheck)
2694 for_each_ring(ring, dev_priv, i) {
2699 semaphore_clear_deadlocks(dev_priv);
2701 seqno = ring->get_seqno(ring, false);
2702 acthd = intel_ring_get_active_head(ring);
2704 if (ring->hangcheck.seqno == seqno) {
2705 if (ring_idle(ring, seqno)) {
2706 ring->hangcheck.action = HANGCHECK_IDLE;
2708 if (waitqueue_active(&ring->irq_queue)) {
2709 /* Issue a wake-up to catch stuck h/w. */
2710 if (!test_and_set_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings)) {
2711 if (!(dev_priv->gpu_error.test_irq_rings & intel_ring_flag(ring)))
2712 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
2715 DRM_INFO("Fake missed irq on %s\n",
2717 wake_up_all(&ring->irq_queue);
2719 /* Safeguard against driver failure */
2720 ring->hangcheck.score += BUSY;
2724 /* We always increment the hangcheck score
2725 * if the ring is busy and still processing
2726 * the same request, so that no single request
2727 * can run indefinitely (such as a chain of
2728 * batches). The only time we do not increment
2729 * the hangcheck score on this ring, if this
2730 * ring is in a legitimate wait for another
2731 * ring. In that case the waiting ring is a
2732 * victim and we want to be sure we catch the
2733 * right culprit. Then every time we do kick
2734 * the ring, add a small increment to the
2735 * score so that we can catch a batch that is
2736 * being repeatedly kicked and so responsible
2737 * for stalling the machine.
2739 ring->hangcheck.action = ring_stuck(ring,
2742 switch (ring->hangcheck.action) {
2743 case HANGCHECK_IDLE:
2744 case HANGCHECK_WAIT:
2746 case HANGCHECK_ACTIVE:
2747 ring->hangcheck.score += BUSY;
2749 case HANGCHECK_KICK:
2750 ring->hangcheck.score += KICK;
2752 case HANGCHECK_HUNG:
2753 ring->hangcheck.score += HUNG;
2759 ring->hangcheck.action = HANGCHECK_ACTIVE;
2761 /* Gradually reduce the count so that we catch DoS
2762 * attempts across multiple batches.
2764 if (ring->hangcheck.score > 0)
2765 ring->hangcheck.score--;
2768 ring->hangcheck.seqno = seqno;
2769 ring->hangcheck.acthd = acthd;
2773 for_each_ring(ring, dev_priv, i) {
2774 if (ring->hangcheck.score >= HANGCHECK_SCORE_RING_HUNG) {
2775 DRM_INFO("%s on %s\n",
2776 stuck[i] ? "stuck" : "no progress",
2783 return i915_handle_error(dev, true, "Ring hung");
2786 /* Reset timer case chip hangs without another request
2788 i915_queue_hangcheck(dev);
2791 void i915_queue_hangcheck(struct drm_device *dev)
2793 struct drm_i915_private *dev_priv = dev->dev_private;
2794 if (!i915.enable_hangcheck)
2797 mod_timer(&dev_priv->gpu_error.hangcheck_timer,
2798 round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
2801 static void ibx_irq_preinstall(struct drm_device *dev)
2803 struct drm_i915_private *dev_priv = dev->dev_private;
2805 if (HAS_PCH_NOP(dev))
2808 /* south display irq */
2809 I915_WRITE(SDEIMR, 0xffffffff);
2811 * SDEIER is also touched by the interrupt handler to work around missed
2812 * PCH interrupts. Hence we can't update it after the interrupt handler
2813 * is enabled - instead we unconditionally enable all PCH interrupt
2814 * sources here, but then only unmask them as needed with SDEIMR.
2816 I915_WRITE(SDEIER, 0xffffffff);
2817 POSTING_READ(SDEIER);
2820 static void gen5_gt_irq_preinstall(struct drm_device *dev)
2822 struct drm_i915_private *dev_priv = dev->dev_private;
2825 I915_WRITE(GTIMR, 0xffffffff);
2826 I915_WRITE(GTIER, 0x0);
2827 POSTING_READ(GTIER);
2829 if (INTEL_INFO(dev)->gen >= 6) {
2831 I915_WRITE(GEN6_PMIMR, 0xffffffff);
2832 I915_WRITE(GEN6_PMIER, 0x0);
2833 POSTING_READ(GEN6_PMIER);
2839 static void ironlake_irq_preinstall(struct drm_device *dev)
2841 struct drm_i915_private *dev_priv = dev->dev_private;
2843 I915_WRITE(HWSTAM, 0xeffe);
2845 I915_WRITE(DEIMR, 0xffffffff);
2846 I915_WRITE(DEIER, 0x0);
2847 POSTING_READ(DEIER);
2849 gen5_gt_irq_preinstall(dev);
2851 ibx_irq_preinstall(dev);
2854 static void valleyview_irq_preinstall(struct drm_device *dev)
2856 struct drm_i915_private *dev_priv = dev->dev_private;
2860 I915_WRITE(VLV_IMR, 0);
2861 I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
2862 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
2863 I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
2866 I915_WRITE(GTIIR, I915_READ(GTIIR));
2867 I915_WRITE(GTIIR, I915_READ(GTIIR));
2869 gen5_gt_irq_preinstall(dev);
2871 I915_WRITE(DPINVGTT, 0xff);
2873 I915_WRITE(PORT_HOTPLUG_EN, 0);
2874 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2876 I915_WRITE(PIPESTAT(pipe), 0xffff);
2877 I915_WRITE(VLV_IIR, 0xffffffff);
2878 I915_WRITE(VLV_IMR, 0xffffffff);
2879 I915_WRITE(VLV_IER, 0x0);
2880 POSTING_READ(VLV_IER);
2883 static void gen8_irq_preinstall(struct drm_device *dev)
2885 struct drm_i915_private *dev_priv = dev->dev_private;
2888 I915_WRITE(GEN8_MASTER_IRQ, 0);
2889 POSTING_READ(GEN8_MASTER_IRQ);
2891 /* IIR can theoretically queue up two events. Be paranoid */
2892 #define GEN8_IRQ_INIT_NDX(type, which) do { \
2893 I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
2894 POSTING_READ(GEN8_##type##_IMR(which)); \
2895 I915_WRITE(GEN8_##type##_IER(which), 0); \
2896 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
2897 POSTING_READ(GEN8_##type##_IIR(which)); \
2898 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
2901 #define GEN8_IRQ_INIT(type) do { \
2902 I915_WRITE(GEN8_##type##_IMR, 0xffffffff); \
2903 POSTING_READ(GEN8_##type##_IMR); \
2904 I915_WRITE(GEN8_##type##_IER, 0); \
2905 I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \
2906 POSTING_READ(GEN8_##type##_IIR); \
2907 I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \
2910 GEN8_IRQ_INIT_NDX(GT, 0);
2911 GEN8_IRQ_INIT_NDX(GT, 1);
2912 GEN8_IRQ_INIT_NDX(GT, 2);
2913 GEN8_IRQ_INIT_NDX(GT, 3);
2915 for_each_pipe(pipe) {
2916 GEN8_IRQ_INIT_NDX(DE_PIPE, pipe);
2919 GEN8_IRQ_INIT(DE_PORT);
2920 GEN8_IRQ_INIT(DE_MISC);
2922 #undef GEN8_IRQ_INIT
2923 #undef GEN8_IRQ_INIT_NDX
2925 POSTING_READ(GEN8_PCU_IIR);
2927 ibx_irq_preinstall(dev);
2930 static void ibx_hpd_irq_setup(struct drm_device *dev)
2932 struct drm_i915_private *dev_priv = dev->dev_private;
2933 struct drm_mode_config *mode_config = &dev->mode_config;
2934 struct intel_encoder *intel_encoder;
2935 u32 hotplug_irqs, hotplug, enabled_irqs = 0;
2937 if (HAS_PCH_IBX(dev)) {
2938 hotplug_irqs = SDE_HOTPLUG_MASK;
2939 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
2940 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
2941 enabled_irqs |= hpd_ibx[intel_encoder->hpd_pin];
2943 hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
2944 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
2945 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
2946 enabled_irqs |= hpd_cpt[intel_encoder->hpd_pin];
2949 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
2952 * Enable digital hotplug on the PCH, and configure the DP short pulse
2953 * duration to 2ms (which is the minimum in the Display Port spec)
2955 * This register is the same on all known PCH chips.
2957 hotplug = I915_READ(PCH_PORT_HOTPLUG);
2958 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
2959 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
2960 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
2961 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
2962 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
2965 static void ibx_irq_postinstall(struct drm_device *dev)
2967 struct drm_i915_private *dev_priv = dev->dev_private;
2970 if (HAS_PCH_NOP(dev))
2973 if (HAS_PCH_IBX(dev)) {
2974 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON;
2976 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
2978 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
2981 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2982 I915_WRITE(SDEIMR, ~mask);
2985 static void gen5_gt_irq_postinstall(struct drm_device *dev)
2987 struct drm_i915_private *dev_priv = dev->dev_private;
2988 u32 pm_irqs, gt_irqs;
2990 pm_irqs = gt_irqs = 0;
2992 dev_priv->gt_irq_mask = ~0;
2993 if (HAS_L3_DPF(dev)) {
2994 /* L3 parity interrupt is always unmasked. */
2995 dev_priv->gt_irq_mask = ~GT_PARITY_ERROR(dev);
2996 gt_irqs |= GT_PARITY_ERROR(dev);
2999 gt_irqs |= GT_RENDER_USER_INTERRUPT;
3001 gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT |
3002 ILK_BSD_USER_INTERRUPT;
3004 gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
3007 I915_WRITE(GTIIR, I915_READ(GTIIR));
3008 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
3009 I915_WRITE(GTIER, gt_irqs);
3010 POSTING_READ(GTIER);
3012 if (INTEL_INFO(dev)->gen >= 6) {
3013 pm_irqs |= dev_priv->pm_rps_events;
3016 pm_irqs |= PM_VEBOX_USER_INTERRUPT;
3018 dev_priv->pm_irq_mask = 0xffffffff;
3019 I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
3020 I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask);
3021 I915_WRITE(GEN6_PMIER, pm_irqs);
3022 POSTING_READ(GEN6_PMIER);
3026 static int ironlake_irq_postinstall(struct drm_device *dev)
3028 unsigned long irqflags;
3029 struct drm_i915_private *dev_priv = dev->dev_private;
3030 u32 display_mask, extra_mask;
3032 if (INTEL_INFO(dev)->gen >= 7) {
3033 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
3034 DE_PCH_EVENT_IVB | DE_PLANEC_FLIP_DONE_IVB |
3035 DE_PLANEB_FLIP_DONE_IVB |
3036 DE_PLANEA_FLIP_DONE_IVB | DE_AUX_CHANNEL_A_IVB);
3037 extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |
3038 DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB);
3040 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
3042 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
3043 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
3045 DE_PIPEB_CRC_DONE | DE_PIPEA_CRC_DONE |
3047 extra_mask = DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT |
3048 DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN;
3051 dev_priv->irq_mask = ~display_mask;
3053 /* should always can generate irq */
3054 I915_WRITE(DEIIR, I915_READ(DEIIR));
3055 I915_WRITE(DEIMR, dev_priv->irq_mask);
3056 I915_WRITE(DEIER, display_mask | extra_mask);
3057 POSTING_READ(DEIER);
3059 gen5_gt_irq_postinstall(dev);
3061 ibx_irq_postinstall(dev);
3063 if (IS_IRONLAKE_M(dev)) {
3064 /* Enable PCU event interrupts
3066 * spinlocking not required here for correctness since interrupt
3067 * setup is guaranteed to run in single-threaded context. But we
3068 * need it to make the assert_spin_locked happy. */
3069 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3070 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
3071 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3077 static void valleyview_display_irqs_install(struct drm_i915_private *dev_priv)
3082 pipestat_mask = PIPESTAT_INT_STATUS_MASK |
3083 PIPE_FIFO_UNDERRUN_STATUS;
3085 I915_WRITE(PIPESTAT(PIPE_A), pipestat_mask);
3086 I915_WRITE(PIPESTAT(PIPE_B), pipestat_mask);
3087 POSTING_READ(PIPESTAT(PIPE_A));
3089 pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV |
3090 PIPE_CRC_DONE_INTERRUPT_STATUS;
3092 i915_enable_pipestat(dev_priv, PIPE_A, pipestat_mask |
3093 PIPE_GMBUS_INTERRUPT_STATUS);
3094 i915_enable_pipestat(dev_priv, PIPE_B, pipestat_mask);
3096 iir_mask = I915_DISPLAY_PORT_INTERRUPT |
3097 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3098 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
3099 dev_priv->irq_mask &= ~iir_mask;
3101 I915_WRITE(VLV_IIR, iir_mask);
3102 I915_WRITE(VLV_IIR, iir_mask);
3103 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
3104 I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
3105 POSTING_READ(VLV_IER);
3108 static void valleyview_display_irqs_uninstall(struct drm_i915_private *dev_priv)
3113 iir_mask = I915_DISPLAY_PORT_INTERRUPT |
3114 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3115 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
3117 dev_priv->irq_mask |= iir_mask;
3118 I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
3119 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
3120 I915_WRITE(VLV_IIR, iir_mask);
3121 I915_WRITE(VLV_IIR, iir_mask);
3122 POSTING_READ(VLV_IIR);
3124 pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV |
3125 PIPE_CRC_DONE_INTERRUPT_STATUS;
3127 i915_disable_pipestat(dev_priv, PIPE_A, pipestat_mask |
3128 PIPE_GMBUS_INTERRUPT_STATUS);
3129 i915_disable_pipestat(dev_priv, PIPE_B, pipestat_mask);
3131 pipestat_mask = PIPESTAT_INT_STATUS_MASK |
3132 PIPE_FIFO_UNDERRUN_STATUS;
3133 I915_WRITE(PIPESTAT(PIPE_A), pipestat_mask);
3134 I915_WRITE(PIPESTAT(PIPE_B), pipestat_mask);
3135 POSTING_READ(PIPESTAT(PIPE_A));
3138 void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv)
3140 assert_spin_locked(&dev_priv->irq_lock);
3142 if (dev_priv->display_irqs_enabled)
3145 dev_priv->display_irqs_enabled = true;
3147 if (dev_priv->dev->irq_enabled)
3148 valleyview_display_irqs_install(dev_priv);
3151 void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
3153 assert_spin_locked(&dev_priv->irq_lock);
3155 if (!dev_priv->display_irqs_enabled)
3158 dev_priv->display_irqs_enabled = false;
3160 if (dev_priv->dev->irq_enabled)
3161 valleyview_display_irqs_uninstall(dev_priv);
3164 static int valleyview_irq_postinstall(struct drm_device *dev)
3166 struct drm_i915_private *dev_priv = dev->dev_private;
3167 unsigned long irqflags;
3169 dev_priv->irq_mask = ~0;
3171 I915_WRITE(PORT_HOTPLUG_EN, 0);
3172 POSTING_READ(PORT_HOTPLUG_EN);
3174 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
3175 I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
3176 I915_WRITE(VLV_IIR, 0xffffffff);
3177 POSTING_READ(VLV_IER);
3179 /* Interrupt setup is already guaranteed to be single-threaded, this is
3180 * just to make the assert_spin_locked check happy. */
3181 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3182 if (dev_priv->display_irqs_enabled)
3183 valleyview_display_irqs_install(dev_priv);
3184 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3186 I915_WRITE(VLV_IIR, 0xffffffff);
3187 I915_WRITE(VLV_IIR, 0xffffffff);
3189 gen5_gt_irq_postinstall(dev);
3191 /* ack & enable invalid PTE error interrupts */
3192 #if 0 /* FIXME: add support to irq handler for checking these bits */
3193 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
3194 I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
3197 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
3202 static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv)
3206 /* These are interrupts we'll toggle with the ring mask register */
3207 uint32_t gt_interrupts[] = {
3208 GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
3209 GT_RENDER_L3_PARITY_ERROR_INTERRUPT |
3210 GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT,
3211 GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
3212 GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT,
3214 GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT
3217 for (i = 0; i < ARRAY_SIZE(gt_interrupts); i++) {
3218 u32 tmp = I915_READ(GEN8_GT_IIR(i));
3220 DRM_ERROR("Interrupt (%d) should have been masked in pre-install 0x%08x\n",
3222 I915_WRITE(GEN8_GT_IMR(i), ~gt_interrupts[i]);
3223 I915_WRITE(GEN8_GT_IER(i), gt_interrupts[i]);
3225 POSTING_READ(GEN8_GT_IER(0));
3228 static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
3230 struct drm_device *dev = dev_priv->dev;
3231 uint32_t de_pipe_masked = GEN8_PIPE_FLIP_DONE |
3232 GEN8_PIPE_CDCLK_CRC_DONE |
3233 GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
3234 uint32_t de_pipe_enables = de_pipe_masked | GEN8_PIPE_VBLANK |
3235 GEN8_PIPE_FIFO_UNDERRUN;
3237 dev_priv->de_irq_mask[PIPE_A] = ~de_pipe_masked;
3238 dev_priv->de_irq_mask[PIPE_B] = ~de_pipe_masked;
3239 dev_priv->de_irq_mask[PIPE_C] = ~de_pipe_masked;
3241 for_each_pipe(pipe) {
3242 u32 tmp = I915_READ(GEN8_DE_PIPE_IIR(pipe));
3244 DRM_ERROR("Interrupt (%d) should have been masked in pre-install 0x%08x\n",
3246 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
3247 I915_WRITE(GEN8_DE_PIPE_IER(pipe), de_pipe_enables);
3249 POSTING_READ(GEN8_DE_PIPE_ISR(0));
3251 I915_WRITE(GEN8_DE_PORT_IMR, ~GEN8_AUX_CHANNEL_A);
3252 I915_WRITE(GEN8_DE_PORT_IER, GEN8_AUX_CHANNEL_A);
3253 POSTING_READ(GEN8_DE_PORT_IER);
3256 static int gen8_irq_postinstall(struct drm_device *dev)
3258 struct drm_i915_private *dev_priv = dev->dev_private;
3260 gen8_gt_irq_postinstall(dev_priv);
3261 gen8_de_irq_postinstall(dev_priv);
3263 ibx_irq_postinstall(dev);
3265 I915_WRITE(GEN8_MASTER_IRQ, DE_MASTER_IRQ_CONTROL);
3266 POSTING_READ(GEN8_MASTER_IRQ);
3271 static void gen8_irq_uninstall(struct drm_device *dev)
3273 struct drm_i915_private *dev_priv = dev->dev_private;
3279 I915_WRITE(GEN8_MASTER_IRQ, 0);
3281 #define GEN8_IRQ_FINI_NDX(type, which) do { \
3282 I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
3283 I915_WRITE(GEN8_##type##_IER(which), 0); \
3284 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
3287 #define GEN8_IRQ_FINI(type) do { \
3288 I915_WRITE(GEN8_##type##_IMR, 0xffffffff); \
3289 I915_WRITE(GEN8_##type##_IER, 0); \
3290 I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \
3293 GEN8_IRQ_FINI_NDX(GT, 0);
3294 GEN8_IRQ_FINI_NDX(GT, 1);
3295 GEN8_IRQ_FINI_NDX(GT, 2);
3296 GEN8_IRQ_FINI_NDX(GT, 3);
3298 for_each_pipe(pipe) {
3299 GEN8_IRQ_FINI_NDX(DE_PIPE, pipe);
3302 GEN8_IRQ_FINI(DE_PORT);
3303 GEN8_IRQ_FINI(DE_MISC);
3305 #undef GEN8_IRQ_FINI
3306 #undef GEN8_IRQ_FINI_NDX
3308 POSTING_READ(GEN8_PCU_IIR);
3311 static void valleyview_irq_uninstall(struct drm_device *dev)
3313 struct drm_i915_private *dev_priv = dev->dev_private;
3314 unsigned long irqflags;
3320 intel_hpd_irq_uninstall(dev_priv);
3323 I915_WRITE(PIPESTAT(pipe), 0xffff);
3325 I915_WRITE(HWSTAM, 0xffffffff);
3326 I915_WRITE(PORT_HOTPLUG_EN, 0);
3327 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3329 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3330 if (dev_priv->display_irqs_enabled)
3331 valleyview_display_irqs_uninstall(dev_priv);
3332 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3334 dev_priv->irq_mask = 0;
3336 I915_WRITE(VLV_IIR, 0xffffffff);
3337 I915_WRITE(VLV_IMR, 0xffffffff);
3338 I915_WRITE(VLV_IER, 0x0);
3339 POSTING_READ(VLV_IER);
3342 static void ironlake_irq_uninstall(struct drm_device *dev)
3344 struct drm_i915_private *dev_priv = dev->dev_private;
3349 intel_hpd_irq_uninstall(dev_priv);
3351 I915_WRITE(HWSTAM, 0xffffffff);
3353 I915_WRITE(DEIMR, 0xffffffff);
3354 I915_WRITE(DEIER, 0x0);
3355 I915_WRITE(DEIIR, I915_READ(DEIIR));
3357 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
3359 I915_WRITE(GTIMR, 0xffffffff);
3360 I915_WRITE(GTIER, 0x0);
3361 I915_WRITE(GTIIR, I915_READ(GTIIR));
3363 if (HAS_PCH_NOP(dev))
3366 I915_WRITE(SDEIMR, 0xffffffff);
3367 I915_WRITE(SDEIER, 0x0);
3368 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
3369 if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev))
3370 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
3373 static void i8xx_irq_preinstall(struct drm_device * dev)
3375 struct drm_i915_private *dev_priv = dev->dev_private;
3379 I915_WRITE(PIPESTAT(pipe), 0);
3380 I915_WRITE16(IMR, 0xffff);
3381 I915_WRITE16(IER, 0x0);
3382 POSTING_READ16(IER);
3385 static int i8xx_irq_postinstall(struct drm_device *dev)
3387 struct drm_i915_private *dev_priv = dev->dev_private;
3388 unsigned long irqflags;
3391 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
3393 /* Unmask the interrupts that we always want on. */
3394 dev_priv->irq_mask =
3395 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3396 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3397 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3398 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3399 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3400 I915_WRITE16(IMR, dev_priv->irq_mask);
3403 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3404 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3405 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
3406 I915_USER_INTERRUPT);
3407 POSTING_READ16(IER);
3409 /* Interrupt setup is already guaranteed to be single-threaded, this is
3410 * just to make the assert_spin_locked check happy. */
3411 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3412 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3413 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3414 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3420 * Returns true when a page flip has completed.
3422 static bool i8xx_handle_vblank(struct drm_device *dev,
3423 int plane, int pipe, u32 iir)
3425 struct drm_i915_private *dev_priv = dev->dev_private;
3426 u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
3428 if (!drm_handle_vblank(dev, pipe))
3431 if ((iir & flip_pending) == 0)
3434 intel_prepare_page_flip(dev, plane);
3436 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3437 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3438 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3439 * the flip is completed (no longer pending). Since this doesn't raise
3440 * an interrupt per se, we watch for the change at vblank.
3442 if (I915_READ16(ISR) & flip_pending)
3445 intel_finish_page_flip(dev, pipe);
3450 static irqreturn_t i8xx_irq_handler(int irq, void *arg)
3452 struct drm_device *dev = (struct drm_device *) arg;
3453 struct drm_i915_private *dev_priv = dev->dev_private;
3456 unsigned long irqflags;
3459 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3460 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3462 iir = I915_READ16(IIR);
3466 while (iir & ~flip_mask) {
3467 /* Can't rely on pipestat interrupt bit in iir as it might
3468 * have been cleared after the pipestat interrupt was received.
3469 * It doesn't set the bit in iir again, but it still produces
3470 * interrupts (for non-MSI).
3472 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3473 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3474 i915_handle_error(dev, false,
3475 "Command parser error, iir 0x%08x",
3478 for_each_pipe(pipe) {
3479 int reg = PIPESTAT(pipe);
3480 pipe_stats[pipe] = I915_READ(reg);
3483 * Clear the PIPE*STAT regs before the IIR
3485 if (pipe_stats[pipe] & 0x8000ffff)
3486 I915_WRITE(reg, pipe_stats[pipe]);
3488 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3490 I915_WRITE16(IIR, iir & ~flip_mask);
3491 new_iir = I915_READ16(IIR); /* Flush posted writes */
3493 i915_update_dri1_breadcrumb(dev);
3495 if (iir & I915_USER_INTERRUPT)
3496 notify_ring(dev, &dev_priv->ring[RCS]);
3498 for_each_pipe(pipe) {
3503 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
3504 i8xx_handle_vblank(dev, plane, pipe, iir))
3505 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
3507 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
3508 i9xx_pipe_crc_irq_handler(dev, pipe);
3510 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS &&
3511 intel_set_cpu_fifo_underrun_reporting(dev, pipe, false))
3512 DRM_ERROR("pipe %c underrun\n", pipe_name(pipe));
3521 static void i8xx_irq_uninstall(struct drm_device * dev)
3523 struct drm_i915_private *dev_priv = dev->dev_private;
3526 for_each_pipe(pipe) {
3527 /* Clear enable bits; then clear status bits */
3528 I915_WRITE(PIPESTAT(pipe), 0);
3529 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
3531 I915_WRITE16(IMR, 0xffff);
3532 I915_WRITE16(IER, 0x0);
3533 I915_WRITE16(IIR, I915_READ16(IIR));
3536 static void i915_irq_preinstall(struct drm_device * dev)
3538 struct drm_i915_private *dev_priv = dev->dev_private;
3541 if (I915_HAS_HOTPLUG(dev)) {
3542 I915_WRITE(PORT_HOTPLUG_EN, 0);
3543 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3546 I915_WRITE16(HWSTAM, 0xeffe);
3548 I915_WRITE(PIPESTAT(pipe), 0);
3549 I915_WRITE(IMR, 0xffffffff);
3550 I915_WRITE(IER, 0x0);
3554 static int i915_irq_postinstall(struct drm_device *dev)
3556 struct drm_i915_private *dev_priv = dev->dev_private;
3558 unsigned long irqflags;
3560 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
3562 /* Unmask the interrupts that we always want on. */
3563 dev_priv->irq_mask =
3564 ~(I915_ASLE_INTERRUPT |
3565 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3566 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3567 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3568 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3569 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3572 I915_ASLE_INTERRUPT |
3573 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3574 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3575 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
3576 I915_USER_INTERRUPT;
3578 if (I915_HAS_HOTPLUG(dev)) {
3579 I915_WRITE(PORT_HOTPLUG_EN, 0);
3580 POSTING_READ(PORT_HOTPLUG_EN);
3582 /* Enable in IER... */
3583 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
3584 /* and unmask in IMR */
3585 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
3588 I915_WRITE(IMR, dev_priv->irq_mask);
3589 I915_WRITE(IER, enable_mask);
3592 i915_enable_asle_pipestat(dev);
3594 /* Interrupt setup is already guaranteed to be single-threaded, this is
3595 * just to make the assert_spin_locked check happy. */
3596 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3597 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3598 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3599 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3605 * Returns true when a page flip has completed.
3607 static bool i915_handle_vblank(struct drm_device *dev,
3608 int plane, int pipe, u32 iir)
3610 struct drm_i915_private *dev_priv = dev->dev_private;
3611 u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
3613 if (!drm_handle_vblank(dev, pipe))
3616 if ((iir & flip_pending) == 0)
3619 intel_prepare_page_flip(dev, plane);
3621 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3622 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3623 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3624 * the flip is completed (no longer pending). Since this doesn't raise
3625 * an interrupt per se, we watch for the change at vblank.
3627 if (I915_READ(ISR) & flip_pending)
3630 intel_finish_page_flip(dev, pipe);
3635 static irqreturn_t i915_irq_handler(int irq, void *arg)
3637 struct drm_device *dev = (struct drm_device *) arg;
3638 struct drm_i915_private *dev_priv = dev->dev_private;
3639 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
3640 unsigned long irqflags;
3642 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3643 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3644 int pipe, ret = IRQ_NONE;
3646 iir = I915_READ(IIR);
3648 bool irq_received = (iir & ~flip_mask) != 0;
3649 bool blc_event = false;
3651 /* Can't rely on pipestat interrupt bit in iir as it might
3652 * have been cleared after the pipestat interrupt was received.
3653 * It doesn't set the bit in iir again, but it still produces
3654 * interrupts (for non-MSI).
3656 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3657 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3658 i915_handle_error(dev, false,
3659 "Command parser error, iir 0x%08x",
3662 for_each_pipe(pipe) {
3663 int reg = PIPESTAT(pipe);
3664 pipe_stats[pipe] = I915_READ(reg);
3666 /* Clear the PIPE*STAT regs before the IIR */
3667 if (pipe_stats[pipe] & 0x8000ffff) {
3668 I915_WRITE(reg, pipe_stats[pipe]);
3669 irq_received = true;
3672 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3677 /* Consume port. Then clear IIR or we'll miss events */
3678 if ((I915_HAS_HOTPLUG(dev)) &&
3679 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
3680 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3681 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
3683 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
3685 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
3686 POSTING_READ(PORT_HOTPLUG_STAT);
3689 I915_WRITE(IIR, iir & ~flip_mask);
3690 new_iir = I915_READ(IIR); /* Flush posted writes */
3692 if (iir & I915_USER_INTERRUPT)
3693 notify_ring(dev, &dev_priv->ring[RCS]);
3695 for_each_pipe(pipe) {
3700 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
3701 i915_handle_vblank(dev, plane, pipe, iir))
3702 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
3704 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
3707 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
3708 i9xx_pipe_crc_irq_handler(dev, pipe);
3710 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS &&
3711 intel_set_cpu_fifo_underrun_reporting(dev, pipe, false))
3712 DRM_ERROR("pipe %c underrun\n", pipe_name(pipe));
3715 if (blc_event || (iir & I915_ASLE_INTERRUPT))
3716 intel_opregion_asle_intr(dev);
3718 /* With MSI, interrupts are only generated when iir
3719 * transitions from zero to nonzero. If another bit got
3720 * set while we were handling the existing iir bits, then
3721 * we would never get another interrupt.
3723 * This is fine on non-MSI as well, as if we hit this path
3724 * we avoid exiting the interrupt handler only to generate
3727 * Note that for MSI this could cause a stray interrupt report
3728 * if an interrupt landed in the time between writing IIR and
3729 * the posting read. This should be rare enough to never
3730 * trigger the 99% of 100,000 interrupts test for disabling
3735 } while (iir & ~flip_mask);
3737 i915_update_dri1_breadcrumb(dev);
3742 static void i915_irq_uninstall(struct drm_device * dev)
3744 struct drm_i915_private *dev_priv = dev->dev_private;
3747 intel_hpd_irq_uninstall(dev_priv);
3749 if (I915_HAS_HOTPLUG(dev)) {
3750 I915_WRITE(PORT_HOTPLUG_EN, 0);
3751 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3754 I915_WRITE16(HWSTAM, 0xffff);
3755 for_each_pipe(pipe) {
3756 /* Clear enable bits; then clear status bits */
3757 I915_WRITE(PIPESTAT(pipe), 0);
3758 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
3760 I915_WRITE(IMR, 0xffffffff);
3761 I915_WRITE(IER, 0x0);
3763 I915_WRITE(IIR, I915_READ(IIR));
3766 static void i965_irq_preinstall(struct drm_device * dev)
3768 struct drm_i915_private *dev_priv = dev->dev_private;
3771 I915_WRITE(PORT_HOTPLUG_EN, 0);
3772 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3774 I915_WRITE(HWSTAM, 0xeffe);
3776 I915_WRITE(PIPESTAT(pipe), 0);
3777 I915_WRITE(IMR, 0xffffffff);
3778 I915_WRITE(IER, 0x0);
3782 static int i965_irq_postinstall(struct drm_device *dev)
3784 struct drm_i915_private *dev_priv = dev->dev_private;
3787 unsigned long irqflags;
3789 /* Unmask the interrupts that we always want on. */
3790 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
3791 I915_DISPLAY_PORT_INTERRUPT |
3792 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3793 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3794 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3795 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3796 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3798 enable_mask = ~dev_priv->irq_mask;
3799 enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3800 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
3801 enable_mask |= I915_USER_INTERRUPT;
3804 enable_mask |= I915_BSD_USER_INTERRUPT;
3806 /* Interrupt setup is already guaranteed to be single-threaded, this is
3807 * just to make the assert_spin_locked check happy. */
3808 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3809 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
3810 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3811 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3812 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3815 * Enable some error detection, note the instruction error mask
3816 * bit is reserved, so we leave it masked.
3819 error_mask = ~(GM45_ERROR_PAGE_TABLE |
3820 GM45_ERROR_MEM_PRIV |
3821 GM45_ERROR_CP_PRIV |
3822 I915_ERROR_MEMORY_REFRESH);
3824 error_mask = ~(I915_ERROR_PAGE_TABLE |
3825 I915_ERROR_MEMORY_REFRESH);
3827 I915_WRITE(EMR, error_mask);
3829 I915_WRITE(IMR, dev_priv->irq_mask);
3830 I915_WRITE(IER, enable_mask);
3833 I915_WRITE(PORT_HOTPLUG_EN, 0);
3834 POSTING_READ(PORT_HOTPLUG_EN);
3836 i915_enable_asle_pipestat(dev);
3841 static void i915_hpd_irq_setup(struct drm_device *dev)
3843 struct drm_i915_private *dev_priv = dev->dev_private;
3844 struct drm_mode_config *mode_config = &dev->mode_config;
3845 struct intel_encoder *intel_encoder;
3848 assert_spin_locked(&dev_priv->irq_lock);
3850 if (I915_HAS_HOTPLUG(dev)) {
3851 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
3852 hotplug_en &= ~HOTPLUG_INT_EN_MASK;
3853 /* Note HDMI and DP share hotplug bits */
3854 /* enable bits are the same for all generations */
3855 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
3856 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
3857 hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin];
3858 /* Programming the CRT detection parameters tends
3859 to generate a spurious hotplug event about three
3860 seconds later. So just do it once.
3863 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
3864 hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK;
3865 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
3867 /* Ignore TV since it's buggy */
3868 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
3872 static irqreturn_t i965_irq_handler(int irq, void *arg)
3874 struct drm_device *dev = (struct drm_device *) arg;
3875 struct drm_i915_private *dev_priv = dev->dev_private;
3877 u32 pipe_stats[I915_MAX_PIPES];
3878 unsigned long irqflags;
3879 int ret = IRQ_NONE, pipe;
3881 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3882 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3884 iir = I915_READ(IIR);
3887 bool irq_received = (iir & ~flip_mask) != 0;
3888 bool blc_event = false;
3890 /* Can't rely on pipestat interrupt bit in iir as it might
3891 * have been cleared after the pipestat interrupt was received.
3892 * It doesn't set the bit in iir again, but it still produces
3893 * interrupts (for non-MSI).
3895 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3896 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3897 i915_handle_error(dev, false,
3898 "Command parser error, iir 0x%08x",
3901 for_each_pipe(pipe) {
3902 int reg = PIPESTAT(pipe);
3903 pipe_stats[pipe] = I915_READ(reg);
3906 * Clear the PIPE*STAT regs before the IIR
3908 if (pipe_stats[pipe] & 0x8000ffff) {
3909 I915_WRITE(reg, pipe_stats[pipe]);
3910 irq_received = true;
3913 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3920 /* Consume port. Then clear IIR or we'll miss events */
3921 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
3922 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3923 u32 hotplug_trigger = hotplug_status & (IS_G4X(dev) ?
3924 HOTPLUG_INT_STATUS_G4X :
3925 HOTPLUG_INT_STATUS_I915);
3927 intel_hpd_irq_handler(dev, hotplug_trigger,
3928 IS_G4X(dev) ? hpd_status_g4x : hpd_status_i915);
3931 (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X))
3932 dp_aux_irq_handler(dev);
3934 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
3935 I915_READ(PORT_HOTPLUG_STAT);
3938 I915_WRITE(IIR, iir & ~flip_mask);
3939 new_iir = I915_READ(IIR); /* Flush posted writes */
3941 if (iir & I915_USER_INTERRUPT)
3942 notify_ring(dev, &dev_priv->ring[RCS]);
3943 if (iir & I915_BSD_USER_INTERRUPT)
3944 notify_ring(dev, &dev_priv->ring[VCS]);
3946 for_each_pipe(pipe) {
3947 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
3948 i915_handle_vblank(dev, pipe, pipe, iir))
3949 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
3951 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
3954 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
3955 i9xx_pipe_crc_irq_handler(dev, pipe);
3957 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS &&
3958 intel_set_cpu_fifo_underrun_reporting(dev, pipe, false))
3959 DRM_ERROR("pipe %c underrun\n", pipe_name(pipe));
3962 if (blc_event || (iir & I915_ASLE_INTERRUPT))
3963 intel_opregion_asle_intr(dev);
3965 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
3966 gmbus_irq_handler(dev);
3968 /* With MSI, interrupts are only generated when iir
3969 * transitions from zero to nonzero. If another bit got
3970 * set while we were handling the existing iir bits, then
3971 * we would never get another interrupt.
3973 * This is fine on non-MSI as well, as if we hit this path
3974 * we avoid exiting the interrupt handler only to generate
3977 * Note that for MSI this could cause a stray interrupt report
3978 * if an interrupt landed in the time between writing IIR and
3979 * the posting read. This should be rare enough to never
3980 * trigger the 99% of 100,000 interrupts test for disabling
3986 i915_update_dri1_breadcrumb(dev);
3991 static void i965_irq_uninstall(struct drm_device * dev)
3993 struct drm_i915_private *dev_priv = dev->dev_private;
3999 intel_hpd_irq_uninstall(dev_priv);
4001 I915_WRITE(PORT_HOTPLUG_EN, 0);
4002 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4004 I915_WRITE(HWSTAM, 0xffffffff);
4006 I915_WRITE(PIPESTAT(pipe), 0);
4007 I915_WRITE(IMR, 0xffffffff);
4008 I915_WRITE(IER, 0x0);
4011 I915_WRITE(PIPESTAT(pipe),
4012 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
4013 I915_WRITE(IIR, I915_READ(IIR));
4016 static void intel_hpd_irq_reenable(unsigned long data)
4018 struct drm_i915_private *dev_priv = (struct drm_i915_private *)data;
4019 struct drm_device *dev = dev_priv->dev;
4020 struct drm_mode_config *mode_config = &dev->mode_config;
4021 unsigned long irqflags;
4024 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
4025 for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) {
4026 struct drm_connector *connector;
4028 if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED)
4031 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
4033 list_for_each_entry(connector, &mode_config->connector_list, head) {
4034 struct intel_connector *intel_connector = to_intel_connector(connector);
4036 if (intel_connector->encoder->hpd_pin == i) {
4037 if (connector->polled != intel_connector->polled)
4038 DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
4039 drm_get_connector_name(connector));
4040 connector->polled = intel_connector->polled;
4041 if (!connector->polled)
4042 connector->polled = DRM_CONNECTOR_POLL_HPD;
4046 if (dev_priv->display.hpd_irq_setup)
4047 dev_priv->display.hpd_irq_setup(dev);
4048 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
4051 void intel_irq_init(struct drm_device *dev)
4053 struct drm_i915_private *dev_priv = dev->dev_private;
4055 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
4056 INIT_WORK(&dev_priv->gpu_error.work, i915_error_work_func);
4057 INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
4058 INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
4060 /* Let's track the enabled rps events */
4061 dev_priv->pm_rps_events = GEN6_PM_RPS_EVENTS;
4063 setup_timer(&dev_priv->gpu_error.hangcheck_timer,
4064 i915_hangcheck_elapsed,
4065 (unsigned long) dev);
4066 setup_timer(&dev_priv->hotplug_reenable_timer, intel_hpd_irq_reenable,
4067 (unsigned long) dev_priv);
4069 pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
4072 dev->max_vblank_count = 0;
4073 dev->driver->get_vblank_counter = i8xx_get_vblank_counter;
4074 } else if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
4075 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
4076 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
4078 dev->driver->get_vblank_counter = i915_get_vblank_counter;
4079 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
4082 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
4083 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
4084 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
4087 if (IS_VALLEYVIEW(dev)) {
4088 dev->driver->irq_handler = valleyview_irq_handler;
4089 dev->driver->irq_preinstall = valleyview_irq_preinstall;
4090 dev->driver->irq_postinstall = valleyview_irq_postinstall;
4091 dev->driver->irq_uninstall = valleyview_irq_uninstall;
4092 dev->driver->enable_vblank = valleyview_enable_vblank;
4093 dev->driver->disable_vblank = valleyview_disable_vblank;
4094 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4095 } else if (IS_GEN8(dev)) {
4096 dev->driver->irq_handler = gen8_irq_handler;
4097 dev->driver->irq_preinstall = gen8_irq_preinstall;
4098 dev->driver->irq_postinstall = gen8_irq_postinstall;
4099 dev->driver->irq_uninstall = gen8_irq_uninstall;
4100 dev->driver->enable_vblank = gen8_enable_vblank;
4101 dev->driver->disable_vblank = gen8_disable_vblank;
4102 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
4103 } else if (HAS_PCH_SPLIT(dev)) {
4104 dev->driver->irq_handler = ironlake_irq_handler;
4105 dev->driver->irq_preinstall = ironlake_irq_preinstall;
4106 dev->driver->irq_postinstall = ironlake_irq_postinstall;
4107 dev->driver->irq_uninstall = ironlake_irq_uninstall;
4108 dev->driver->enable_vblank = ironlake_enable_vblank;
4109 dev->driver->disable_vblank = ironlake_disable_vblank;
4110 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
4112 if (INTEL_INFO(dev)->gen == 2) {
4113 dev->driver->irq_preinstall = i8xx_irq_preinstall;
4114 dev->driver->irq_postinstall = i8xx_irq_postinstall;
4115 dev->driver->irq_handler = i8xx_irq_handler;
4116 dev->driver->irq_uninstall = i8xx_irq_uninstall;
4117 } else if (INTEL_INFO(dev)->gen == 3) {
4118 dev->driver->irq_preinstall = i915_irq_preinstall;
4119 dev->driver->irq_postinstall = i915_irq_postinstall;
4120 dev->driver->irq_uninstall = i915_irq_uninstall;
4121 dev->driver->irq_handler = i915_irq_handler;
4122 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4124 dev->driver->irq_preinstall = i965_irq_preinstall;
4125 dev->driver->irq_postinstall = i965_irq_postinstall;
4126 dev->driver->irq_uninstall = i965_irq_uninstall;
4127 dev->driver->irq_handler = i965_irq_handler;
4128 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4130 dev->driver->enable_vblank = i915_enable_vblank;
4131 dev->driver->disable_vblank = i915_disable_vblank;
4135 void intel_hpd_init(struct drm_device *dev)
4137 struct drm_i915_private *dev_priv = dev->dev_private;
4138 struct drm_mode_config *mode_config = &dev->mode_config;
4139 struct drm_connector *connector;
4140 unsigned long irqflags;
4143 for (i = 1; i < HPD_NUM_PINS; i++) {
4144 dev_priv->hpd_stats[i].hpd_cnt = 0;
4145 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
4147 list_for_each_entry(connector, &mode_config->connector_list, head) {
4148 struct intel_connector *intel_connector = to_intel_connector(connector);
4149 connector->polled = intel_connector->polled;
4150 if (!connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE)
4151 connector->polled = DRM_CONNECTOR_POLL_HPD;
4154 /* Interrupt setup is already guaranteed to be single-threaded, this is
4155 * just to make the assert_spin_locked checks happy. */
4156 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
4157 if (dev_priv->display.hpd_irq_setup)
4158 dev_priv->display.hpd_irq_setup(dev);
4159 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
4162 /* Disable interrupts so we can allow runtime PM. */
4163 void hsw_runtime_pm_disable_interrupts(struct drm_device *dev)
4165 struct drm_i915_private *dev_priv = dev->dev_private;
4166 unsigned long irqflags;
4168 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
4170 dev_priv->pm.regsave.deimr = I915_READ(DEIMR);
4171 dev_priv->pm.regsave.sdeimr = I915_READ(SDEIMR);
4172 dev_priv->pm.regsave.gtimr = I915_READ(GTIMR);
4173 dev_priv->pm.regsave.gtier = I915_READ(GTIER);
4174 dev_priv->pm.regsave.gen6_pmimr = I915_READ(GEN6_PMIMR);
4176 ironlake_disable_display_irq(dev_priv, 0xffffffff);
4177 ibx_disable_display_interrupt(dev_priv, 0xffffffff);
4178 ilk_disable_gt_irq(dev_priv, 0xffffffff);
4179 snb_disable_pm_irq(dev_priv, 0xffffffff);
4181 dev_priv->pm.irqs_disabled = true;
4183 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
4186 /* Restore interrupts so we can recover from runtime PM. */
4187 void hsw_runtime_pm_restore_interrupts(struct drm_device *dev)
4189 struct drm_i915_private *dev_priv = dev->dev_private;
4190 unsigned long irqflags;
4193 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
4195 val = I915_READ(DEIMR);
4196 WARN(val != 0xffffffff, "DEIMR is 0x%08x\n", val);
4198 val = I915_READ(SDEIMR);
4199 WARN(val != 0xffffffff, "SDEIMR is 0x%08x\n", val);
4201 val = I915_READ(GTIMR);
4202 WARN(val != 0xffffffff, "GTIMR is 0x%08x\n", val);
4204 val = I915_READ(GEN6_PMIMR);
4205 WARN(val != 0xffffffff, "GEN6_PMIMR is 0x%08x\n", val);
4207 dev_priv->pm.irqs_disabled = false;
4209 ironlake_enable_display_irq(dev_priv, ~dev_priv->pm.regsave.deimr);
4210 ibx_enable_display_interrupt(dev_priv, ~dev_priv->pm.regsave.sdeimr);
4211 ilk_enable_gt_irq(dev_priv, ~dev_priv->pm.regsave.gtimr);
4212 snb_enable_pm_irq(dev_priv, ~dev_priv->pm.regsave.gen6_pmimr);
4213 I915_WRITE(GTIER, dev_priv->pm.regsave.gtier);
4215 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);