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"
41 * DOC: interrupt handling
43 * These functions provide the basic support for enabling and disabling the
44 * interrupt handling support. There's a lot more functionality in i915_irq.c
45 * and related files, but that will be described in separate chapters.
48 static const u32 hpd_ibx[HPD_NUM_PINS] = {
49 [HPD_CRT] = SDE_CRT_HOTPLUG,
50 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
51 [HPD_PORT_B] = SDE_PORTB_HOTPLUG,
52 [HPD_PORT_C] = SDE_PORTC_HOTPLUG,
53 [HPD_PORT_D] = SDE_PORTD_HOTPLUG
56 static const u32 hpd_cpt[HPD_NUM_PINS] = {
57 [HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
58 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
59 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
60 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
61 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
64 static const u32 hpd_mask_i915[HPD_NUM_PINS] = {
65 [HPD_CRT] = CRT_HOTPLUG_INT_EN,
66 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
67 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
68 [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
69 [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
70 [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
73 static const u32 hpd_status_g4x[HPD_NUM_PINS] = {
74 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
75 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
76 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
77 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
78 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
79 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
82 static const u32 hpd_status_i915[HPD_NUM_PINS] = { /* i915 and valleyview are the same */
83 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
84 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
85 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
86 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
87 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
88 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
91 /* IIR can theoretically queue up two events. Be paranoid. */
92 #define GEN8_IRQ_RESET_NDX(type, which) do { \
93 I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
94 POSTING_READ(GEN8_##type##_IMR(which)); \
95 I915_WRITE(GEN8_##type##_IER(which), 0); \
96 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
97 POSTING_READ(GEN8_##type##_IIR(which)); \
98 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
99 POSTING_READ(GEN8_##type##_IIR(which)); \
102 #define GEN5_IRQ_RESET(type) do { \
103 I915_WRITE(type##IMR, 0xffffffff); \
104 POSTING_READ(type##IMR); \
105 I915_WRITE(type##IER, 0); \
106 I915_WRITE(type##IIR, 0xffffffff); \
107 POSTING_READ(type##IIR); \
108 I915_WRITE(type##IIR, 0xffffffff); \
109 POSTING_READ(type##IIR); \
113 * We should clear IMR at preinstall/uninstall, and just check at postinstall.
115 #define GEN5_ASSERT_IIR_IS_ZERO(reg) do { \
116 u32 val = I915_READ(reg); \
118 WARN(1, "Interrupt register 0x%x is not zero: 0x%08x\n", \
120 I915_WRITE((reg), 0xffffffff); \
122 I915_WRITE((reg), 0xffffffff); \
127 #define GEN8_IRQ_INIT_NDX(type, which, imr_val, ier_val) do { \
128 GEN5_ASSERT_IIR_IS_ZERO(GEN8_##type##_IIR(which)); \
129 I915_WRITE(GEN8_##type##_IER(which), (ier_val)); \
130 I915_WRITE(GEN8_##type##_IMR(which), (imr_val)); \
131 POSTING_READ(GEN8_##type##_IMR(which)); \
134 #define GEN5_IRQ_INIT(type, imr_val, ier_val) do { \
135 GEN5_ASSERT_IIR_IS_ZERO(type##IIR); \
136 I915_WRITE(type##IER, (ier_val)); \
137 I915_WRITE(type##IMR, (imr_val)); \
138 POSTING_READ(type##IMR); \
141 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
143 /* For display hotplug interrupt */
145 ironlake_enable_display_irq(struct drm_i915_private *dev_priv, u32 mask)
147 assert_spin_locked(&dev_priv->irq_lock);
149 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
152 if ((dev_priv->irq_mask & mask) != 0) {
153 dev_priv->irq_mask &= ~mask;
154 I915_WRITE(DEIMR, dev_priv->irq_mask);
160 ironlake_disable_display_irq(struct drm_i915_private *dev_priv, u32 mask)
162 assert_spin_locked(&dev_priv->irq_lock);
164 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
167 if ((dev_priv->irq_mask & mask) != mask) {
168 dev_priv->irq_mask |= mask;
169 I915_WRITE(DEIMR, dev_priv->irq_mask);
175 * ilk_update_gt_irq - update GTIMR
176 * @dev_priv: driver private
177 * @interrupt_mask: mask of interrupt bits to update
178 * @enabled_irq_mask: mask of interrupt bits to enable
180 static void ilk_update_gt_irq(struct drm_i915_private *dev_priv,
181 uint32_t interrupt_mask,
182 uint32_t enabled_irq_mask)
184 assert_spin_locked(&dev_priv->irq_lock);
186 WARN_ON(enabled_irq_mask & ~interrupt_mask);
188 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
191 dev_priv->gt_irq_mask &= ~interrupt_mask;
192 dev_priv->gt_irq_mask |= (~enabled_irq_mask & interrupt_mask);
193 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
197 void gen5_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
199 ilk_update_gt_irq(dev_priv, mask, mask);
202 void gen5_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
204 ilk_update_gt_irq(dev_priv, mask, 0);
207 static u32 gen6_pm_iir(struct drm_i915_private *dev_priv)
209 return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IIR(2) : GEN6_PMIIR;
212 static u32 gen6_pm_imr(struct drm_i915_private *dev_priv)
214 return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IMR(2) : GEN6_PMIMR;
217 static u32 gen6_pm_ier(struct drm_i915_private *dev_priv)
219 return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IER(2) : GEN6_PMIER;
223 * snb_update_pm_irq - update GEN6_PMIMR
224 * @dev_priv: driver private
225 * @interrupt_mask: mask of interrupt bits to update
226 * @enabled_irq_mask: mask of interrupt bits to enable
228 static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
229 uint32_t interrupt_mask,
230 uint32_t enabled_irq_mask)
234 WARN_ON(enabled_irq_mask & ~interrupt_mask);
236 assert_spin_locked(&dev_priv->irq_lock);
238 new_val = dev_priv->pm_irq_mask;
239 new_val &= ~interrupt_mask;
240 new_val |= (~enabled_irq_mask & interrupt_mask);
242 if (new_val != dev_priv->pm_irq_mask) {
243 dev_priv->pm_irq_mask = new_val;
244 I915_WRITE(gen6_pm_imr(dev_priv), dev_priv->pm_irq_mask);
245 POSTING_READ(gen6_pm_imr(dev_priv));
249 void gen6_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
251 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
254 snb_update_pm_irq(dev_priv, mask, mask);
257 static void __gen6_disable_pm_irq(struct drm_i915_private *dev_priv,
260 snb_update_pm_irq(dev_priv, mask, 0);
263 void gen6_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
265 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
268 __gen6_disable_pm_irq(dev_priv, mask);
271 void gen6_reset_rps_interrupts(struct drm_device *dev)
273 struct drm_i915_private *dev_priv = dev->dev_private;
274 uint32_t reg = gen6_pm_iir(dev_priv);
276 spin_lock_irq(&dev_priv->irq_lock);
277 I915_WRITE(reg, dev_priv->pm_rps_events);
278 I915_WRITE(reg, dev_priv->pm_rps_events);
280 spin_unlock_irq(&dev_priv->irq_lock);
283 void gen6_enable_rps_interrupts(struct drm_device *dev)
285 struct drm_i915_private *dev_priv = dev->dev_private;
287 spin_lock_irq(&dev_priv->irq_lock);
289 WARN_ON(dev_priv->rps.pm_iir);
290 WARN_ON(I915_READ(gen6_pm_iir(dev_priv)) & dev_priv->pm_rps_events);
291 dev_priv->rps.interrupts_enabled = true;
292 I915_WRITE(gen6_pm_ier(dev_priv), I915_READ(gen6_pm_ier(dev_priv)) |
293 dev_priv->pm_rps_events);
294 gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
296 spin_unlock_irq(&dev_priv->irq_lock);
299 u32 gen6_sanitize_rps_pm_mask(struct drm_i915_private *dev_priv, u32 mask)
302 * SNB,IVB can while VLV,CHV may hard hang on looping batchbuffer
303 * if GEN6_PM_UP_EI_EXPIRED is masked.
305 * TODO: verify if this can be reproduced on VLV,CHV.
307 if (INTEL_INFO(dev_priv)->gen <= 7 && !IS_HASWELL(dev_priv))
308 mask &= ~GEN6_PM_RP_UP_EI_EXPIRED;
310 if (INTEL_INFO(dev_priv)->gen >= 8)
311 mask &= ~GEN8_PMINTR_REDIRECT_TO_NON_DISP;
316 void gen6_disable_rps_interrupts(struct drm_device *dev)
318 struct drm_i915_private *dev_priv = dev->dev_private;
320 spin_lock_irq(&dev_priv->irq_lock);
321 dev_priv->rps.interrupts_enabled = false;
322 spin_unlock_irq(&dev_priv->irq_lock);
324 cancel_work_sync(&dev_priv->rps.work);
326 spin_lock_irq(&dev_priv->irq_lock);
328 I915_WRITE(GEN6_PMINTRMSK, gen6_sanitize_rps_pm_mask(dev_priv, ~0));
330 __gen6_disable_pm_irq(dev_priv, dev_priv->pm_rps_events);
331 I915_WRITE(gen6_pm_ier(dev_priv), I915_READ(gen6_pm_ier(dev_priv)) &
332 ~dev_priv->pm_rps_events);
333 I915_WRITE(gen6_pm_iir(dev_priv), dev_priv->pm_rps_events);
334 I915_WRITE(gen6_pm_iir(dev_priv), dev_priv->pm_rps_events);
336 dev_priv->rps.pm_iir = 0;
338 spin_unlock_irq(&dev_priv->irq_lock);
342 * ibx_display_interrupt_update - update SDEIMR
343 * @dev_priv: driver private
344 * @interrupt_mask: mask of interrupt bits to update
345 * @enabled_irq_mask: mask of interrupt bits to enable
347 void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
348 uint32_t interrupt_mask,
349 uint32_t enabled_irq_mask)
351 uint32_t sdeimr = I915_READ(SDEIMR);
352 sdeimr &= ~interrupt_mask;
353 sdeimr |= (~enabled_irq_mask & interrupt_mask);
355 WARN_ON(enabled_irq_mask & ~interrupt_mask);
357 assert_spin_locked(&dev_priv->irq_lock);
359 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
362 I915_WRITE(SDEIMR, sdeimr);
363 POSTING_READ(SDEIMR);
367 __i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
368 u32 enable_mask, u32 status_mask)
370 u32 reg = PIPESTAT(pipe);
371 u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
373 assert_spin_locked(&dev_priv->irq_lock);
374 WARN_ON(!intel_irqs_enabled(dev_priv));
376 if (WARN_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
377 status_mask & ~PIPESTAT_INT_STATUS_MASK,
378 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
379 pipe_name(pipe), enable_mask, status_mask))
382 if ((pipestat & enable_mask) == enable_mask)
385 dev_priv->pipestat_irq_mask[pipe] |= status_mask;
387 /* Enable the interrupt, clear any pending status */
388 pipestat |= enable_mask | status_mask;
389 I915_WRITE(reg, pipestat);
394 __i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
395 u32 enable_mask, u32 status_mask)
397 u32 reg = PIPESTAT(pipe);
398 u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
400 assert_spin_locked(&dev_priv->irq_lock);
401 WARN_ON(!intel_irqs_enabled(dev_priv));
403 if (WARN_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
404 status_mask & ~PIPESTAT_INT_STATUS_MASK,
405 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
406 pipe_name(pipe), enable_mask, status_mask))
409 if ((pipestat & enable_mask) == 0)
412 dev_priv->pipestat_irq_mask[pipe] &= ~status_mask;
414 pipestat &= ~enable_mask;
415 I915_WRITE(reg, pipestat);
419 static u32 vlv_get_pipestat_enable_mask(struct drm_device *dev, u32 status_mask)
421 u32 enable_mask = status_mask << 16;
424 * On pipe A we don't support the PSR interrupt yet,
425 * on pipe B and C the same bit MBZ.
427 if (WARN_ON_ONCE(status_mask & PIPE_A_PSR_STATUS_VLV))
430 * On pipe B and C we don't support the PSR interrupt yet, on pipe
431 * A the same bit is for perf counters which we don't use either.
433 if (WARN_ON_ONCE(status_mask & PIPE_B_PSR_STATUS_VLV))
436 enable_mask &= ~(PIPE_FIFO_UNDERRUN_STATUS |
437 SPRITE0_FLIP_DONE_INT_EN_VLV |
438 SPRITE1_FLIP_DONE_INT_EN_VLV);
439 if (status_mask & SPRITE0_FLIP_DONE_INT_STATUS_VLV)
440 enable_mask |= SPRITE0_FLIP_DONE_INT_EN_VLV;
441 if (status_mask & SPRITE1_FLIP_DONE_INT_STATUS_VLV)
442 enable_mask |= SPRITE1_FLIP_DONE_INT_EN_VLV;
448 i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
453 if (IS_VALLEYVIEW(dev_priv->dev))
454 enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev,
457 enable_mask = status_mask << 16;
458 __i915_enable_pipestat(dev_priv, pipe, enable_mask, status_mask);
462 i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
467 if (IS_VALLEYVIEW(dev_priv->dev))
468 enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev,
471 enable_mask = status_mask << 16;
472 __i915_disable_pipestat(dev_priv, pipe, enable_mask, status_mask);
476 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
478 static void i915_enable_asle_pipestat(struct drm_device *dev)
480 struct drm_i915_private *dev_priv = dev->dev_private;
482 if (!dev_priv->opregion.asle || !IS_MOBILE(dev))
485 spin_lock_irq(&dev_priv->irq_lock);
487 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_STATUS);
488 if (INTEL_INFO(dev)->gen >= 4)
489 i915_enable_pipestat(dev_priv, PIPE_A,
490 PIPE_LEGACY_BLC_EVENT_STATUS);
492 spin_unlock_irq(&dev_priv->irq_lock);
496 * This timing diagram depicts the video signal in and
497 * around the vertical blanking period.
499 * Assumptions about the fictitious mode used in this example:
501 * vsync_start = vblank_start + 1
502 * vsync_end = vblank_start + 2
503 * vtotal = vblank_start + 3
506 * latch double buffered registers
507 * increment frame counter (ctg+)
508 * generate start of vblank interrupt (gen4+)
511 * | generate frame start interrupt (aka. vblank interrupt) (gmch)
512 * | may be shifted forward 1-3 extra lines via PIPECONF
514 * | | start of vsync:
515 * | | generate vsync interrupt
517 * ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx
518 * . \hs/ . \hs/ \hs/ \hs/ . \hs/
519 * ----va---> <-----------------vb--------------------> <--------va-------------
520 * | | <----vs-----> |
521 * -vbs-----> <---vbs+1---> <---vbs+2---> <-----0-----> <-----1-----> <-----2--- (scanline counter gen2)
522 * -vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2---> <-----0--- (scanline counter gen3+)
523 * -vbs-2---> <---vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2- (scanline counter hsw+ hdmi)
525 * last visible pixel first visible pixel
526 * | increment frame counter (gen3/4)
527 * pixel counter = vblank_start * htotal pixel counter = 0 (gen3/4)
529 * x = horizontal active
530 * _ = horizontal blanking
531 * hs = horizontal sync
532 * va = vertical active
533 * vb = vertical blanking
535 * vbs = vblank_start (number)
538 * - most events happen at the start of horizontal sync
539 * - frame start happens at the start of horizontal blank, 1-4 lines
540 * (depending on PIPECONF settings) after the start of vblank
541 * - gen3/4 pixel and frame counter are synchronized with the start
542 * of horizontal active on the first line of vertical active
545 static u32 i8xx_get_vblank_counter(struct drm_device *dev, int pipe)
547 /* Gen2 doesn't have a hardware frame counter */
551 /* Called from drm generic code, passed a 'crtc', which
552 * we use as a pipe index
554 static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
556 struct drm_i915_private *dev_priv = dev->dev_private;
557 unsigned long high_frame;
558 unsigned long low_frame;
559 u32 high1, high2, low, pixel, vbl_start, hsync_start, htotal;
560 struct intel_crtc *intel_crtc =
561 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
562 const struct drm_display_mode *mode =
563 &intel_crtc->config->base.adjusted_mode;
565 htotal = mode->crtc_htotal;
566 hsync_start = mode->crtc_hsync_start;
567 vbl_start = mode->crtc_vblank_start;
568 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
569 vbl_start = DIV_ROUND_UP(vbl_start, 2);
571 /* Convert to pixel count */
574 /* Start of vblank event occurs at start of hsync */
575 vbl_start -= htotal - hsync_start;
577 high_frame = PIPEFRAME(pipe);
578 low_frame = PIPEFRAMEPIXEL(pipe);
581 * High & low register fields aren't synchronized, so make sure
582 * we get a low value that's stable across two reads of the high
586 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
587 low = I915_READ(low_frame);
588 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
589 } while (high1 != high2);
591 high1 >>= PIPE_FRAME_HIGH_SHIFT;
592 pixel = low & PIPE_PIXEL_MASK;
593 low >>= PIPE_FRAME_LOW_SHIFT;
596 * The frame counter increments at beginning of active.
597 * Cook up a vblank counter by also checking the pixel
598 * counter against vblank start.
600 return (((high1 << 8) | low) + (pixel >= vbl_start)) & 0xffffff;
603 static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
605 struct drm_i915_private *dev_priv = dev->dev_private;
606 int reg = PIPE_FRMCOUNT_GM45(pipe);
608 return I915_READ(reg);
611 /* raw reads, only for fast reads of display block, no need for forcewake etc. */
612 #define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
614 static int __intel_get_crtc_scanline(struct intel_crtc *crtc)
616 struct drm_device *dev = crtc->base.dev;
617 struct drm_i915_private *dev_priv = dev->dev_private;
618 const struct drm_display_mode *mode = &crtc->config->base.adjusted_mode;
619 enum pipe pipe = crtc->pipe;
620 int position, vtotal;
622 vtotal = mode->crtc_vtotal;
623 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
627 position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN2;
629 position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
632 * See update_scanline_offset() for the details on the
633 * scanline_offset adjustment.
635 return (position + crtc->scanline_offset) % vtotal;
638 static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
639 unsigned int flags, int *vpos, int *hpos,
640 ktime_t *stime, ktime_t *etime)
642 struct drm_i915_private *dev_priv = dev->dev_private;
643 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
644 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
645 const struct drm_display_mode *mode = &intel_crtc->config->base.adjusted_mode;
647 int vbl_start, vbl_end, hsync_start, htotal, vtotal;
650 unsigned long irqflags;
652 if (!intel_crtc->active) {
653 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
654 "pipe %c\n", pipe_name(pipe));
658 htotal = mode->crtc_htotal;
659 hsync_start = mode->crtc_hsync_start;
660 vtotal = mode->crtc_vtotal;
661 vbl_start = mode->crtc_vblank_start;
662 vbl_end = mode->crtc_vblank_end;
664 if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
665 vbl_start = DIV_ROUND_UP(vbl_start, 2);
670 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
673 * Lock uncore.lock, as we will do multiple timing critical raw
674 * register reads, potentially with preemption disabled, so the
675 * following code must not block on uncore.lock.
677 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
679 /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
681 /* Get optional system timestamp before query. */
683 *stime = ktime_get();
685 if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
686 /* No obvious pixelcount register. Only query vertical
687 * scanout position from Display scan line register.
689 position = __intel_get_crtc_scanline(intel_crtc);
691 /* Have access to pixelcount since start of frame.
692 * We can split this into vertical and horizontal
695 position = (__raw_i915_read32(dev_priv, PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
697 /* convert to pixel counts */
703 * In interlaced modes, the pixel counter counts all pixels,
704 * so one field will have htotal more pixels. In order to avoid
705 * the reported position from jumping backwards when the pixel
706 * counter is beyond the length of the shorter field, just
707 * clamp the position the length of the shorter field. This
708 * matches how the scanline counter based position works since
709 * the scanline counter doesn't count the two half lines.
711 if (position >= vtotal)
712 position = vtotal - 1;
715 * Start of vblank interrupt is triggered at start of hsync,
716 * just prior to the first active line of vblank. However we
717 * consider lines to start at the leading edge of horizontal
718 * active. So, should we get here before we've crossed into
719 * the horizontal active of the first line in vblank, we would
720 * not set the DRM_SCANOUTPOS_INVBL flag. In order to fix that,
721 * always add htotal-hsync_start to the current pixel position.
723 position = (position + htotal - hsync_start) % vtotal;
726 /* Get optional system timestamp after query. */
728 *etime = ktime_get();
730 /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
732 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
734 in_vbl = position >= vbl_start && position < vbl_end;
737 * While in vblank, position will be negative
738 * counting up towards 0 at vbl_end. And outside
739 * vblank, position will be positive counting
742 if (position >= vbl_start)
745 position += vtotal - vbl_end;
747 if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
751 *vpos = position / htotal;
752 *hpos = position - (*vpos * htotal);
757 ret |= DRM_SCANOUTPOS_IN_VBLANK;
762 int intel_get_crtc_scanline(struct intel_crtc *crtc)
764 struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
765 unsigned long irqflags;
768 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
769 position = __intel_get_crtc_scanline(crtc);
770 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
775 static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
777 struct timeval *vblank_time,
780 struct drm_crtc *crtc;
782 if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) {
783 DRM_ERROR("Invalid crtc %d\n", pipe);
787 /* Get drm_crtc to timestamp: */
788 crtc = intel_get_crtc_for_pipe(dev, pipe);
790 DRM_ERROR("Invalid crtc %d\n", pipe);
794 if (!crtc->state->enable) {
795 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
799 /* Helper routine in DRM core does all the work: */
800 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
803 &to_intel_crtc(crtc)->config->base.adjusted_mode);
806 static bool intel_hpd_irq_event(struct drm_device *dev,
807 struct drm_connector *connector)
809 enum drm_connector_status old_status;
811 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
812 old_status = connector->status;
814 connector->status = connector->funcs->detect(connector, false);
815 if (old_status == connector->status)
818 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
821 drm_get_connector_status_name(old_status),
822 drm_get_connector_status_name(connector->status));
827 static void i915_digport_work_func(struct work_struct *work)
829 struct drm_i915_private *dev_priv =
830 container_of(work, struct drm_i915_private, dig_port_work);
831 u32 long_port_mask, short_port_mask;
832 struct intel_digital_port *intel_dig_port;
836 spin_lock_irq(&dev_priv->irq_lock);
837 long_port_mask = dev_priv->long_hpd_port_mask;
838 dev_priv->long_hpd_port_mask = 0;
839 short_port_mask = dev_priv->short_hpd_port_mask;
840 dev_priv->short_hpd_port_mask = 0;
841 spin_unlock_irq(&dev_priv->irq_lock);
843 for (i = 0; i < I915_MAX_PORTS; i++) {
845 bool long_hpd = false;
846 intel_dig_port = dev_priv->hpd_irq_port[i];
847 if (!intel_dig_port || !intel_dig_port->hpd_pulse)
850 if (long_port_mask & (1 << i)) {
853 } else if (short_port_mask & (1 << i))
859 ret = intel_dig_port->hpd_pulse(intel_dig_port, long_hpd);
860 if (ret == IRQ_NONE) {
861 /* fall back to old school hpd */
862 old_bits |= (1 << intel_dig_port->base.hpd_pin);
868 spin_lock_irq(&dev_priv->irq_lock);
869 dev_priv->hpd_event_bits |= old_bits;
870 spin_unlock_irq(&dev_priv->irq_lock);
871 schedule_work(&dev_priv->hotplug_work);
876 * Handle hotplug events outside the interrupt handler proper.
878 #define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
880 static void i915_hotplug_work_func(struct work_struct *work)
882 struct drm_i915_private *dev_priv =
883 container_of(work, struct drm_i915_private, hotplug_work);
884 struct drm_device *dev = dev_priv->dev;
885 struct drm_mode_config *mode_config = &dev->mode_config;
886 struct intel_connector *intel_connector;
887 struct intel_encoder *intel_encoder;
888 struct drm_connector *connector;
889 bool hpd_disabled = false;
890 bool changed = false;
893 mutex_lock(&mode_config->mutex);
894 DRM_DEBUG_KMS("running encoder hotplug functions\n");
896 spin_lock_irq(&dev_priv->irq_lock);
898 hpd_event_bits = dev_priv->hpd_event_bits;
899 dev_priv->hpd_event_bits = 0;
900 list_for_each_entry(connector, &mode_config->connector_list, head) {
901 intel_connector = to_intel_connector(connector);
902 if (!intel_connector->encoder)
904 intel_encoder = intel_connector->encoder;
905 if (intel_encoder->hpd_pin > HPD_NONE &&
906 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
907 connector->polled == DRM_CONNECTOR_POLL_HPD) {
908 DRM_INFO("HPD interrupt storm detected on connector %s: "
909 "switching from hotplug detection to polling\n",
911 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED;
912 connector->polled = DRM_CONNECTOR_POLL_CONNECT
913 | DRM_CONNECTOR_POLL_DISCONNECT;
916 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
917 DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
918 connector->name, intel_encoder->hpd_pin);
921 /* if there were no outputs to poll, poll was disabled,
922 * therefore make sure it's enabled when disabling HPD on
925 drm_kms_helper_poll_enable(dev);
926 mod_delayed_work(system_wq, &dev_priv->hotplug_reenable_work,
927 msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY));
930 spin_unlock_irq(&dev_priv->irq_lock);
932 list_for_each_entry(connector, &mode_config->connector_list, head) {
933 intel_connector = to_intel_connector(connector);
934 if (!intel_connector->encoder)
936 intel_encoder = intel_connector->encoder;
937 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
938 if (intel_encoder->hot_plug)
939 intel_encoder->hot_plug(intel_encoder);
940 if (intel_hpd_irq_event(dev, connector))
944 mutex_unlock(&mode_config->mutex);
947 drm_kms_helper_hotplug_event(dev);
950 static void ironlake_rps_change_irq_handler(struct drm_device *dev)
952 struct drm_i915_private *dev_priv = dev->dev_private;
953 u32 busy_up, busy_down, max_avg, min_avg;
956 spin_lock(&mchdev_lock);
958 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
960 new_delay = dev_priv->ips.cur_delay;
962 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
963 busy_up = I915_READ(RCPREVBSYTUPAVG);
964 busy_down = I915_READ(RCPREVBSYTDNAVG);
965 max_avg = I915_READ(RCBMAXAVG);
966 min_avg = I915_READ(RCBMINAVG);
968 /* Handle RCS change request from hw */
969 if (busy_up > max_avg) {
970 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
971 new_delay = dev_priv->ips.cur_delay - 1;
972 if (new_delay < dev_priv->ips.max_delay)
973 new_delay = dev_priv->ips.max_delay;
974 } else if (busy_down < min_avg) {
975 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
976 new_delay = dev_priv->ips.cur_delay + 1;
977 if (new_delay > dev_priv->ips.min_delay)
978 new_delay = dev_priv->ips.min_delay;
981 if (ironlake_set_drps(dev, new_delay))
982 dev_priv->ips.cur_delay = new_delay;
984 spin_unlock(&mchdev_lock);
989 static void notify_ring(struct drm_device *dev,
990 struct intel_engine_cs *ring)
992 if (!intel_ring_initialized(ring))
995 trace_i915_gem_request_notify(ring);
997 wake_up_all(&ring->irq_queue);
1000 static u32 vlv_c0_residency(struct drm_i915_private *dev_priv,
1001 struct intel_rps_ei *rps_ei)
1003 u32 cz_ts, cz_freq_khz;
1004 u32 render_count, media_count;
1005 u32 elapsed_render, elapsed_media, elapsed_time;
1008 cz_ts = vlv_punit_read(dev_priv, PUNIT_REG_CZ_TIMESTAMP);
1009 cz_freq_khz = DIV_ROUND_CLOSEST(dev_priv->mem_freq * 1000, 4);
1011 render_count = I915_READ(VLV_RENDER_C0_COUNT_REG);
1012 media_count = I915_READ(VLV_MEDIA_C0_COUNT_REG);
1014 if (rps_ei->cz_clock == 0) {
1015 rps_ei->cz_clock = cz_ts;
1016 rps_ei->render_c0 = render_count;
1017 rps_ei->media_c0 = media_count;
1019 return dev_priv->rps.cur_freq;
1022 elapsed_time = cz_ts - rps_ei->cz_clock;
1023 rps_ei->cz_clock = cz_ts;
1025 elapsed_render = render_count - rps_ei->render_c0;
1026 rps_ei->render_c0 = render_count;
1028 elapsed_media = media_count - rps_ei->media_c0;
1029 rps_ei->media_c0 = media_count;
1031 /* Convert all the counters into common unit of milli sec */
1032 elapsed_time /= VLV_CZ_CLOCK_TO_MILLI_SEC;
1033 elapsed_render /= cz_freq_khz;
1034 elapsed_media /= cz_freq_khz;
1037 * Calculate overall C0 residency percentage
1038 * only if elapsed time is non zero
1042 ((max(elapsed_render, elapsed_media) * 100)
1050 * vlv_calc_delay_from_C0_counters - Increase/Decrease freq based on GPU
1051 * busy-ness calculated from C0 counters of render & media power wells
1052 * @dev_priv: DRM device private
1055 static int vlv_calc_delay_from_C0_counters(struct drm_i915_private *dev_priv)
1057 u32 residency_C0_up = 0, residency_C0_down = 0;
1060 dev_priv->rps.ei_interrupt_count++;
1062 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
1065 if (dev_priv->rps.up_ei.cz_clock == 0) {
1066 vlv_c0_residency(dev_priv, &dev_priv->rps.up_ei);
1067 vlv_c0_residency(dev_priv, &dev_priv->rps.down_ei);
1068 return dev_priv->rps.cur_freq;
1073 * To down throttle, C0 residency should be less than down threshold
1074 * for continous EI intervals. So calculate down EI counters
1075 * once in VLV_INT_COUNT_FOR_DOWN_EI
1077 if (dev_priv->rps.ei_interrupt_count == VLV_INT_COUNT_FOR_DOWN_EI) {
1079 dev_priv->rps.ei_interrupt_count = 0;
1081 residency_C0_down = vlv_c0_residency(dev_priv,
1082 &dev_priv->rps.down_ei);
1084 residency_C0_up = vlv_c0_residency(dev_priv,
1085 &dev_priv->rps.up_ei);
1088 new_delay = dev_priv->rps.cur_freq;
1090 adj = dev_priv->rps.last_adj;
1091 /* C0 residency is greater than UP threshold. Increase Frequency */
1092 if (residency_C0_up >= VLV_RP_UP_EI_THRESHOLD) {
1098 if (dev_priv->rps.cur_freq < dev_priv->rps.max_freq_softlimit)
1099 new_delay = dev_priv->rps.cur_freq + adj;
1102 * For better performance, jump directly
1103 * to RPe if we're below it.
1105 if (new_delay < dev_priv->rps.efficient_freq)
1106 new_delay = dev_priv->rps.efficient_freq;
1108 } else if (!dev_priv->rps.ei_interrupt_count &&
1109 (residency_C0_down < VLV_RP_DOWN_EI_THRESHOLD)) {
1115 * This means, C0 residency is less than down threshold over
1116 * a period of VLV_INT_COUNT_FOR_DOWN_EI. So, reduce the freq
1118 if (dev_priv->rps.cur_freq > dev_priv->rps.min_freq_softlimit)
1119 new_delay = dev_priv->rps.cur_freq + adj;
1125 static void gen6_pm_rps_work(struct work_struct *work)
1127 struct drm_i915_private *dev_priv =
1128 container_of(work, struct drm_i915_private, rps.work);
1132 spin_lock_irq(&dev_priv->irq_lock);
1133 /* Speed up work cancelation during disabling rps interrupts. */
1134 if (!dev_priv->rps.interrupts_enabled) {
1135 spin_unlock_irq(&dev_priv->irq_lock);
1138 pm_iir = dev_priv->rps.pm_iir;
1139 dev_priv->rps.pm_iir = 0;
1140 /* Make sure not to corrupt PMIMR state used by ringbuffer on GEN6 */
1141 gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
1142 spin_unlock_irq(&dev_priv->irq_lock);
1144 /* Make sure we didn't queue anything we're not going to process. */
1145 WARN_ON(pm_iir & ~dev_priv->pm_rps_events);
1147 if ((pm_iir & dev_priv->pm_rps_events) == 0)
1150 mutex_lock(&dev_priv->rps.hw_lock);
1152 adj = dev_priv->rps.last_adj;
1153 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
1157 /* CHV needs even encode values */
1158 adj = IS_CHERRYVIEW(dev_priv->dev) ? 2 : 1;
1160 new_delay = dev_priv->rps.cur_freq + adj;
1163 * For better performance, jump directly
1164 * to RPe if we're below it.
1166 if (new_delay < dev_priv->rps.efficient_freq)
1167 new_delay = dev_priv->rps.efficient_freq;
1168 } else if (pm_iir & GEN6_PM_RP_DOWN_TIMEOUT) {
1169 if (dev_priv->rps.cur_freq > dev_priv->rps.efficient_freq)
1170 new_delay = dev_priv->rps.efficient_freq;
1172 new_delay = dev_priv->rps.min_freq_softlimit;
1174 } else if (pm_iir & GEN6_PM_RP_UP_EI_EXPIRED) {
1175 new_delay = vlv_calc_delay_from_C0_counters(dev_priv);
1176 } else if (pm_iir & GEN6_PM_RP_DOWN_THRESHOLD) {
1180 /* CHV needs even encode values */
1181 adj = IS_CHERRYVIEW(dev_priv->dev) ? -2 : -1;
1183 new_delay = dev_priv->rps.cur_freq + adj;
1184 } else { /* unknown event */
1185 new_delay = dev_priv->rps.cur_freq;
1188 /* sysfs frequency interfaces may have snuck in while servicing the
1191 new_delay = clamp_t(int, new_delay,
1192 dev_priv->rps.min_freq_softlimit,
1193 dev_priv->rps.max_freq_softlimit);
1195 dev_priv->rps.last_adj = new_delay - dev_priv->rps.cur_freq;
1197 intel_set_rps(dev_priv->dev, new_delay);
1199 mutex_unlock(&dev_priv->rps.hw_lock);
1204 * ivybridge_parity_work - Workqueue called when a parity error interrupt
1206 * @work: workqueue struct
1208 * Doesn't actually do anything except notify userspace. As a consequence of
1209 * this event, userspace should try to remap the bad rows since statistically
1210 * it is likely the same row is more likely to go bad again.
1212 static void ivybridge_parity_work(struct work_struct *work)
1214 struct drm_i915_private *dev_priv =
1215 container_of(work, struct drm_i915_private, l3_parity.error_work);
1216 u32 error_status, row, bank, subbank;
1217 char *parity_event[6];
1221 /* We must turn off DOP level clock gating to access the L3 registers.
1222 * In order to prevent a get/put style interface, acquire struct mutex
1223 * any time we access those registers.
1225 mutex_lock(&dev_priv->dev->struct_mutex);
1227 /* If we've screwed up tracking, just let the interrupt fire again */
1228 if (WARN_ON(!dev_priv->l3_parity.which_slice))
1231 misccpctl = I915_READ(GEN7_MISCCPCTL);
1232 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
1233 POSTING_READ(GEN7_MISCCPCTL);
1235 while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) {
1239 if (WARN_ON_ONCE(slice >= NUM_L3_SLICES(dev_priv->dev)))
1242 dev_priv->l3_parity.which_slice &= ~(1<<slice);
1244 reg = GEN7_L3CDERRST1 + (slice * 0x200);
1246 error_status = I915_READ(reg);
1247 row = GEN7_PARITY_ERROR_ROW(error_status);
1248 bank = GEN7_PARITY_ERROR_BANK(error_status);
1249 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
1251 I915_WRITE(reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE);
1254 parity_event[0] = I915_L3_PARITY_UEVENT "=1";
1255 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
1256 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
1257 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
1258 parity_event[4] = kasprintf(GFP_KERNEL, "SLICE=%d", slice);
1259 parity_event[5] = NULL;
1261 kobject_uevent_env(&dev_priv->dev->primary->kdev->kobj,
1262 KOBJ_CHANGE, parity_event);
1264 DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n",
1265 slice, row, bank, subbank);
1267 kfree(parity_event[4]);
1268 kfree(parity_event[3]);
1269 kfree(parity_event[2]);
1270 kfree(parity_event[1]);
1273 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
1276 WARN_ON(dev_priv->l3_parity.which_slice);
1277 spin_lock_irq(&dev_priv->irq_lock);
1278 gen5_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv->dev));
1279 spin_unlock_irq(&dev_priv->irq_lock);
1281 mutex_unlock(&dev_priv->dev->struct_mutex);
1284 static void ivybridge_parity_error_irq_handler(struct drm_device *dev, u32 iir)
1286 struct drm_i915_private *dev_priv = dev->dev_private;
1288 if (!HAS_L3_DPF(dev))
1291 spin_lock(&dev_priv->irq_lock);
1292 gen5_disable_gt_irq(dev_priv, GT_PARITY_ERROR(dev));
1293 spin_unlock(&dev_priv->irq_lock);
1295 iir &= GT_PARITY_ERROR(dev);
1296 if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1)
1297 dev_priv->l3_parity.which_slice |= 1 << 1;
1299 if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
1300 dev_priv->l3_parity.which_slice |= 1 << 0;
1302 queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
1305 static void ilk_gt_irq_handler(struct drm_device *dev,
1306 struct drm_i915_private *dev_priv,
1310 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1311 notify_ring(dev, &dev_priv->ring[RCS]);
1312 if (gt_iir & ILK_BSD_USER_INTERRUPT)
1313 notify_ring(dev, &dev_priv->ring[VCS]);
1316 static void snb_gt_irq_handler(struct drm_device *dev,
1317 struct drm_i915_private *dev_priv,
1322 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1323 notify_ring(dev, &dev_priv->ring[RCS]);
1324 if (gt_iir & GT_BSD_USER_INTERRUPT)
1325 notify_ring(dev, &dev_priv->ring[VCS]);
1326 if (gt_iir & GT_BLT_USER_INTERRUPT)
1327 notify_ring(dev, &dev_priv->ring[BCS]);
1329 if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
1330 GT_BSD_CS_ERROR_INTERRUPT |
1331 GT_RENDER_CS_MASTER_ERROR_INTERRUPT))
1332 DRM_DEBUG("Command parser error, gt_iir 0x%08x\n", gt_iir);
1334 if (gt_iir & GT_PARITY_ERROR(dev))
1335 ivybridge_parity_error_irq_handler(dev, gt_iir);
1338 static irqreturn_t gen8_gt_irq_handler(struct drm_device *dev,
1339 struct drm_i915_private *dev_priv,
1342 struct intel_engine_cs *ring;
1345 irqreturn_t ret = IRQ_NONE;
1347 if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
1348 tmp = I915_READ(GEN8_GT_IIR(0));
1350 I915_WRITE(GEN8_GT_IIR(0), tmp);
1353 rcs = tmp >> GEN8_RCS_IRQ_SHIFT;
1354 ring = &dev_priv->ring[RCS];
1355 if (rcs & GT_RENDER_USER_INTERRUPT)
1356 notify_ring(dev, ring);
1357 if (rcs & GT_CONTEXT_SWITCH_INTERRUPT)
1358 intel_lrc_irq_handler(ring);
1360 bcs = tmp >> GEN8_BCS_IRQ_SHIFT;
1361 ring = &dev_priv->ring[BCS];
1362 if (bcs & GT_RENDER_USER_INTERRUPT)
1363 notify_ring(dev, ring);
1364 if (bcs & GT_CONTEXT_SWITCH_INTERRUPT)
1365 intel_lrc_irq_handler(ring);
1367 DRM_ERROR("The master control interrupt lied (GT0)!\n");
1370 if (master_ctl & (GEN8_GT_VCS1_IRQ | GEN8_GT_VCS2_IRQ)) {
1371 tmp = I915_READ(GEN8_GT_IIR(1));
1373 I915_WRITE(GEN8_GT_IIR(1), tmp);
1376 vcs = tmp >> GEN8_VCS1_IRQ_SHIFT;
1377 ring = &dev_priv->ring[VCS];
1378 if (vcs & GT_RENDER_USER_INTERRUPT)
1379 notify_ring(dev, ring);
1380 if (vcs & GT_CONTEXT_SWITCH_INTERRUPT)
1381 intel_lrc_irq_handler(ring);
1383 vcs = tmp >> GEN8_VCS2_IRQ_SHIFT;
1384 ring = &dev_priv->ring[VCS2];
1385 if (vcs & GT_RENDER_USER_INTERRUPT)
1386 notify_ring(dev, ring);
1387 if (vcs & GT_CONTEXT_SWITCH_INTERRUPT)
1388 intel_lrc_irq_handler(ring);
1390 DRM_ERROR("The master control interrupt lied (GT1)!\n");
1393 if (master_ctl & GEN8_GT_PM_IRQ) {
1394 tmp = I915_READ(GEN8_GT_IIR(2));
1395 if (tmp & dev_priv->pm_rps_events) {
1396 I915_WRITE(GEN8_GT_IIR(2),
1397 tmp & dev_priv->pm_rps_events);
1399 gen6_rps_irq_handler(dev_priv, tmp);
1401 DRM_ERROR("The master control interrupt lied (PM)!\n");
1404 if (master_ctl & GEN8_GT_VECS_IRQ) {
1405 tmp = I915_READ(GEN8_GT_IIR(3));
1407 I915_WRITE(GEN8_GT_IIR(3), tmp);
1410 vcs = tmp >> GEN8_VECS_IRQ_SHIFT;
1411 ring = &dev_priv->ring[VECS];
1412 if (vcs & GT_RENDER_USER_INTERRUPT)
1413 notify_ring(dev, ring);
1414 if (vcs & GT_CONTEXT_SWITCH_INTERRUPT)
1415 intel_lrc_irq_handler(ring);
1417 DRM_ERROR("The master control interrupt lied (GT3)!\n");
1423 #define HPD_STORM_DETECT_PERIOD 1000
1424 #define HPD_STORM_THRESHOLD 5
1426 static int pch_port_to_hotplug_shift(enum port port)
1442 static int i915_port_to_hotplug_shift(enum port port)
1458 static inline enum port get_port_from_pin(enum hpd_pin pin)
1468 return PORT_A; /* no hpd */
1472 static inline void intel_hpd_irq_handler(struct drm_device *dev,
1473 u32 hotplug_trigger,
1474 u32 dig_hotplug_reg,
1475 const u32 hpd[HPD_NUM_PINS])
1477 struct drm_i915_private *dev_priv = dev->dev_private;
1480 bool storm_detected = false;
1481 bool queue_dig = false, queue_hp = false;
1483 u32 dig_port_mask = 0;
1485 if (!hotplug_trigger)
1488 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x, dig 0x%08x\n",
1489 hotplug_trigger, dig_hotplug_reg);
1491 spin_lock(&dev_priv->irq_lock);
1492 for (i = 1; i < HPD_NUM_PINS; i++) {
1493 if (!(hpd[i] & hotplug_trigger))
1496 port = get_port_from_pin(i);
1497 if (port && dev_priv->hpd_irq_port[port]) {
1500 if (HAS_PCH_SPLIT(dev)) {
1501 dig_shift = pch_port_to_hotplug_shift(port);
1502 long_hpd = (dig_hotplug_reg >> dig_shift) & PORTB_HOTPLUG_LONG_DETECT;
1504 dig_shift = i915_port_to_hotplug_shift(port);
1505 long_hpd = (hotplug_trigger >> dig_shift) & PORTB_HOTPLUG_LONG_DETECT;
1508 DRM_DEBUG_DRIVER("digital hpd port %c - %s\n",
1510 long_hpd ? "long" : "short");
1511 /* for long HPD pulses we want to have the digital queue happen,
1512 but we still want HPD storm detection to function. */
1514 dev_priv->long_hpd_port_mask |= (1 << port);
1515 dig_port_mask |= hpd[i];
1517 /* for short HPD just trigger the digital queue */
1518 dev_priv->short_hpd_port_mask |= (1 << port);
1519 hotplug_trigger &= ~hpd[i];
1525 for (i = 1; i < HPD_NUM_PINS; i++) {
1526 if (hpd[i] & hotplug_trigger &&
1527 dev_priv->hpd_stats[i].hpd_mark == HPD_DISABLED) {
1529 * On GMCH platforms the interrupt mask bits only
1530 * prevent irq generation, not the setting of the
1531 * hotplug bits itself. So only WARN about unexpected
1532 * interrupts on saner platforms.
1534 WARN_ONCE(INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev),
1535 "Received HPD interrupt (0x%08x) on pin %d (0x%08x) although disabled\n",
1536 hotplug_trigger, i, hpd[i]);
1541 if (!(hpd[i] & hotplug_trigger) ||
1542 dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
1545 if (!(dig_port_mask & hpd[i])) {
1546 dev_priv->hpd_event_bits |= (1 << i);
1550 if (!time_in_range(jiffies, dev_priv->hpd_stats[i].hpd_last_jiffies,
1551 dev_priv->hpd_stats[i].hpd_last_jiffies
1552 + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) {
1553 dev_priv->hpd_stats[i].hpd_last_jiffies = jiffies;
1554 dev_priv->hpd_stats[i].hpd_cnt = 0;
1555 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: 0\n", i);
1556 } else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) {
1557 dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
1558 dev_priv->hpd_event_bits &= ~(1 << i);
1559 DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
1560 storm_detected = true;
1562 dev_priv->hpd_stats[i].hpd_cnt++;
1563 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n", i,
1564 dev_priv->hpd_stats[i].hpd_cnt);
1569 dev_priv->display.hpd_irq_setup(dev);
1570 spin_unlock(&dev_priv->irq_lock);
1573 * Our hotplug handler can grab modeset locks (by calling down into the
1574 * fb helpers). Hence it must not be run on our own dev-priv->wq work
1575 * queue for otherwise the flush_work in the pageflip code will
1579 queue_work(dev_priv->dp_wq, &dev_priv->dig_port_work);
1581 schedule_work(&dev_priv->hotplug_work);
1584 static void gmbus_irq_handler(struct drm_device *dev)
1586 struct drm_i915_private *dev_priv = dev->dev_private;
1588 wake_up_all(&dev_priv->gmbus_wait_queue);
1591 static void dp_aux_irq_handler(struct drm_device *dev)
1593 struct drm_i915_private *dev_priv = dev->dev_private;
1595 wake_up_all(&dev_priv->gmbus_wait_queue);
1598 #if defined(CONFIG_DEBUG_FS)
1599 static void display_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe,
1600 uint32_t crc0, uint32_t crc1,
1601 uint32_t crc2, uint32_t crc3,
1604 struct drm_i915_private *dev_priv = dev->dev_private;
1605 struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
1606 struct intel_pipe_crc_entry *entry;
1609 spin_lock(&pipe_crc->lock);
1611 if (!pipe_crc->entries) {
1612 spin_unlock(&pipe_crc->lock);
1613 DRM_DEBUG_KMS("spurious interrupt\n");
1617 head = pipe_crc->head;
1618 tail = pipe_crc->tail;
1620 if (CIRC_SPACE(head, tail, INTEL_PIPE_CRC_ENTRIES_NR) < 1) {
1621 spin_unlock(&pipe_crc->lock);
1622 DRM_ERROR("CRC buffer overflowing\n");
1626 entry = &pipe_crc->entries[head];
1628 entry->frame = dev->driver->get_vblank_counter(dev, pipe);
1629 entry->crc[0] = crc0;
1630 entry->crc[1] = crc1;
1631 entry->crc[2] = crc2;
1632 entry->crc[3] = crc3;
1633 entry->crc[4] = crc4;
1635 head = (head + 1) & (INTEL_PIPE_CRC_ENTRIES_NR - 1);
1636 pipe_crc->head = head;
1638 spin_unlock(&pipe_crc->lock);
1640 wake_up_interruptible(&pipe_crc->wq);
1644 display_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe,
1645 uint32_t crc0, uint32_t crc1,
1646 uint32_t crc2, uint32_t crc3,
1651 static void hsw_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe)
1653 struct drm_i915_private *dev_priv = dev->dev_private;
1655 display_pipe_crc_irq_handler(dev, pipe,
1656 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1660 static void ivb_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe)
1662 struct drm_i915_private *dev_priv = dev->dev_private;
1664 display_pipe_crc_irq_handler(dev, pipe,
1665 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1666 I915_READ(PIPE_CRC_RES_2_IVB(pipe)),
1667 I915_READ(PIPE_CRC_RES_3_IVB(pipe)),
1668 I915_READ(PIPE_CRC_RES_4_IVB(pipe)),
1669 I915_READ(PIPE_CRC_RES_5_IVB(pipe)));
1672 static void i9xx_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe)
1674 struct drm_i915_private *dev_priv = dev->dev_private;
1675 uint32_t res1, res2;
1677 if (INTEL_INFO(dev)->gen >= 3)
1678 res1 = I915_READ(PIPE_CRC_RES_RES1_I915(pipe));
1682 if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev))
1683 res2 = I915_READ(PIPE_CRC_RES_RES2_G4X(pipe));
1687 display_pipe_crc_irq_handler(dev, pipe,
1688 I915_READ(PIPE_CRC_RES_RED(pipe)),
1689 I915_READ(PIPE_CRC_RES_GREEN(pipe)),
1690 I915_READ(PIPE_CRC_RES_BLUE(pipe)),
1694 /* The RPS events need forcewake, so we add them to a work queue and mask their
1695 * IMR bits until the work is done. Other interrupts can be processed without
1696 * the work queue. */
1697 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
1699 if (pm_iir & dev_priv->pm_rps_events) {
1700 spin_lock(&dev_priv->irq_lock);
1701 gen6_disable_pm_irq(dev_priv, pm_iir & dev_priv->pm_rps_events);
1702 if (dev_priv->rps.interrupts_enabled) {
1703 dev_priv->rps.pm_iir |= pm_iir & dev_priv->pm_rps_events;
1704 queue_work(dev_priv->wq, &dev_priv->rps.work);
1706 spin_unlock(&dev_priv->irq_lock);
1709 if (INTEL_INFO(dev_priv)->gen >= 8)
1712 if (HAS_VEBOX(dev_priv->dev)) {
1713 if (pm_iir & PM_VEBOX_USER_INTERRUPT)
1714 notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
1716 if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT)
1717 DRM_DEBUG("Command parser error, pm_iir 0x%08x\n", pm_iir);
1721 static bool intel_pipe_handle_vblank(struct drm_device *dev, enum pipe pipe)
1723 if (!drm_handle_vblank(dev, pipe))
1729 static void valleyview_pipestat_irq_handler(struct drm_device *dev, u32 iir)
1731 struct drm_i915_private *dev_priv = dev->dev_private;
1732 u32 pipe_stats[I915_MAX_PIPES] = { };
1735 spin_lock(&dev_priv->irq_lock);
1736 for_each_pipe(dev_priv, pipe) {
1738 u32 mask, iir_bit = 0;
1741 * PIPESTAT bits get signalled even when the interrupt is
1742 * disabled with the mask bits, and some of the status bits do
1743 * not generate interrupts at all (like the underrun bit). Hence
1744 * we need to be careful that we only handle what we want to
1748 /* fifo underruns are filterered in the underrun handler. */
1749 mask = PIPE_FIFO_UNDERRUN_STATUS;
1753 iir_bit = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
1756 iir_bit = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
1759 iir_bit = I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
1763 mask |= dev_priv->pipestat_irq_mask[pipe];
1768 reg = PIPESTAT(pipe);
1769 mask |= PIPESTAT_INT_ENABLE_MASK;
1770 pipe_stats[pipe] = I915_READ(reg) & mask;
1773 * Clear the PIPE*STAT regs before the IIR
1775 if (pipe_stats[pipe] & (PIPE_FIFO_UNDERRUN_STATUS |
1776 PIPESTAT_INT_STATUS_MASK))
1777 I915_WRITE(reg, pipe_stats[pipe]);
1779 spin_unlock(&dev_priv->irq_lock);
1781 for_each_pipe(dev_priv, pipe) {
1782 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
1783 intel_pipe_handle_vblank(dev, pipe))
1784 intel_check_page_flip(dev, pipe);
1786 if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV) {
1787 intel_prepare_page_flip(dev, pipe);
1788 intel_finish_page_flip(dev, pipe);
1791 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1792 i9xx_pipe_crc_irq_handler(dev, pipe);
1794 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1795 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1798 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
1799 gmbus_irq_handler(dev);
1802 static void i9xx_hpd_irq_handler(struct drm_device *dev)
1804 struct drm_i915_private *dev_priv = dev->dev_private;
1805 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
1807 if (hotplug_status) {
1808 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
1810 * Make sure hotplug status is cleared before we clear IIR, or else we
1811 * may miss hotplug events.
1813 POSTING_READ(PORT_HOTPLUG_STAT);
1816 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_G4X;
1818 intel_hpd_irq_handler(dev, hotplug_trigger, 0, hpd_status_g4x);
1820 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
1822 intel_hpd_irq_handler(dev, hotplug_trigger, 0, hpd_status_i915);
1825 if ((IS_G4X(dev) || IS_VALLEYVIEW(dev)) &&
1826 hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X)
1827 dp_aux_irq_handler(dev);
1831 static irqreturn_t valleyview_irq_handler(int irq, void *arg)
1833 struct drm_device *dev = arg;
1834 struct drm_i915_private *dev_priv = dev->dev_private;
1835 u32 iir, gt_iir, pm_iir;
1836 irqreturn_t ret = IRQ_NONE;
1838 if (!intel_irqs_enabled(dev_priv))
1842 /* Find, clear, then process each source of interrupt */
1844 gt_iir = I915_READ(GTIIR);
1846 I915_WRITE(GTIIR, gt_iir);
1848 pm_iir = I915_READ(GEN6_PMIIR);
1850 I915_WRITE(GEN6_PMIIR, pm_iir);
1852 iir = I915_READ(VLV_IIR);
1854 /* Consume port before clearing IIR or we'll miss events */
1855 if (iir & I915_DISPLAY_PORT_INTERRUPT)
1856 i9xx_hpd_irq_handler(dev);
1857 I915_WRITE(VLV_IIR, iir);
1860 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
1866 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1868 gen6_rps_irq_handler(dev_priv, pm_iir);
1869 /* Call regardless, as some status bits might not be
1870 * signalled in iir */
1871 valleyview_pipestat_irq_handler(dev, iir);
1878 static irqreturn_t cherryview_irq_handler(int irq, void *arg)
1880 struct drm_device *dev = arg;
1881 struct drm_i915_private *dev_priv = dev->dev_private;
1882 u32 master_ctl, iir;
1883 irqreturn_t ret = IRQ_NONE;
1885 if (!intel_irqs_enabled(dev_priv))
1889 master_ctl = I915_READ(GEN8_MASTER_IRQ) & ~GEN8_MASTER_IRQ_CONTROL;
1890 iir = I915_READ(VLV_IIR);
1892 if (master_ctl == 0 && iir == 0)
1897 I915_WRITE(GEN8_MASTER_IRQ, 0);
1899 /* Find, clear, then process each source of interrupt */
1902 /* Consume port before clearing IIR or we'll miss events */
1903 if (iir & I915_DISPLAY_PORT_INTERRUPT)
1904 i9xx_hpd_irq_handler(dev);
1905 I915_WRITE(VLV_IIR, iir);
1908 gen8_gt_irq_handler(dev, dev_priv, master_ctl);
1910 /* Call regardless, as some status bits might not be
1911 * signalled in iir */
1912 valleyview_pipestat_irq_handler(dev, iir);
1914 I915_WRITE(GEN8_MASTER_IRQ, DE_MASTER_IRQ_CONTROL);
1915 POSTING_READ(GEN8_MASTER_IRQ);
1921 static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
1923 struct drm_i915_private *dev_priv = dev->dev_private;
1925 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
1926 u32 dig_hotplug_reg;
1928 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
1929 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
1931 intel_hpd_irq_handler(dev, hotplug_trigger, dig_hotplug_reg, hpd_ibx);
1933 if (pch_iir & SDE_AUDIO_POWER_MASK) {
1934 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
1935 SDE_AUDIO_POWER_SHIFT);
1936 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
1940 if (pch_iir & SDE_AUX_MASK)
1941 dp_aux_irq_handler(dev);
1943 if (pch_iir & SDE_GMBUS)
1944 gmbus_irq_handler(dev);
1946 if (pch_iir & SDE_AUDIO_HDCP_MASK)
1947 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1949 if (pch_iir & SDE_AUDIO_TRANS_MASK)
1950 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1952 if (pch_iir & SDE_POISON)
1953 DRM_ERROR("PCH poison interrupt\n");
1955 if (pch_iir & SDE_FDI_MASK)
1956 for_each_pipe(dev_priv, pipe)
1957 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1959 I915_READ(FDI_RX_IIR(pipe)));
1961 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
1962 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1964 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
1965 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
1967 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
1968 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_A);
1970 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
1971 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_B);
1974 static void ivb_err_int_handler(struct drm_device *dev)
1976 struct drm_i915_private *dev_priv = dev->dev_private;
1977 u32 err_int = I915_READ(GEN7_ERR_INT);
1980 if (err_int & ERR_INT_POISON)
1981 DRM_ERROR("Poison interrupt\n");
1983 for_each_pipe(dev_priv, pipe) {
1984 if (err_int & ERR_INT_FIFO_UNDERRUN(pipe))
1985 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1987 if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) {
1988 if (IS_IVYBRIDGE(dev))
1989 ivb_pipe_crc_irq_handler(dev, pipe);
1991 hsw_pipe_crc_irq_handler(dev, pipe);
1995 I915_WRITE(GEN7_ERR_INT, err_int);
1998 static void cpt_serr_int_handler(struct drm_device *dev)
2000 struct drm_i915_private *dev_priv = dev->dev_private;
2001 u32 serr_int = I915_READ(SERR_INT);
2003 if (serr_int & SERR_INT_POISON)
2004 DRM_ERROR("PCH poison interrupt\n");
2006 if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
2007 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_A);
2009 if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
2010 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_B);
2012 if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
2013 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_C);
2015 I915_WRITE(SERR_INT, serr_int);
2018 static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
2020 struct drm_i915_private *dev_priv = dev->dev_private;
2022 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
2023 u32 dig_hotplug_reg;
2025 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
2026 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
2028 intel_hpd_irq_handler(dev, hotplug_trigger, dig_hotplug_reg, hpd_cpt);
2030 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
2031 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
2032 SDE_AUDIO_POWER_SHIFT_CPT);
2033 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
2037 if (pch_iir & SDE_AUX_MASK_CPT)
2038 dp_aux_irq_handler(dev);
2040 if (pch_iir & SDE_GMBUS_CPT)
2041 gmbus_irq_handler(dev);
2043 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
2044 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
2046 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
2047 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
2049 if (pch_iir & SDE_FDI_MASK_CPT)
2050 for_each_pipe(dev_priv, pipe)
2051 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
2053 I915_READ(FDI_RX_IIR(pipe)));
2055 if (pch_iir & SDE_ERROR_CPT)
2056 cpt_serr_int_handler(dev);
2059 static void ilk_display_irq_handler(struct drm_device *dev, u32 de_iir)
2061 struct drm_i915_private *dev_priv = dev->dev_private;
2064 if (de_iir & DE_AUX_CHANNEL_A)
2065 dp_aux_irq_handler(dev);
2067 if (de_iir & DE_GSE)
2068 intel_opregion_asle_intr(dev);
2070 if (de_iir & DE_POISON)
2071 DRM_ERROR("Poison interrupt\n");
2073 for_each_pipe(dev_priv, pipe) {
2074 if (de_iir & DE_PIPE_VBLANK(pipe) &&
2075 intel_pipe_handle_vblank(dev, pipe))
2076 intel_check_page_flip(dev, pipe);
2078 if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe))
2079 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2081 if (de_iir & DE_PIPE_CRC_DONE(pipe))
2082 i9xx_pipe_crc_irq_handler(dev, pipe);
2084 /* plane/pipes map 1:1 on ilk+ */
2085 if (de_iir & DE_PLANE_FLIP_DONE(pipe)) {
2086 intel_prepare_page_flip(dev, pipe);
2087 intel_finish_page_flip_plane(dev, pipe);
2091 /* check event from PCH */
2092 if (de_iir & DE_PCH_EVENT) {
2093 u32 pch_iir = I915_READ(SDEIIR);
2095 if (HAS_PCH_CPT(dev))
2096 cpt_irq_handler(dev, pch_iir);
2098 ibx_irq_handler(dev, pch_iir);
2100 /* should clear PCH hotplug event before clear CPU irq */
2101 I915_WRITE(SDEIIR, pch_iir);
2104 if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
2105 ironlake_rps_change_irq_handler(dev);
2108 static void ivb_display_irq_handler(struct drm_device *dev, u32 de_iir)
2110 struct drm_i915_private *dev_priv = dev->dev_private;
2113 if (de_iir & DE_ERR_INT_IVB)
2114 ivb_err_int_handler(dev);
2116 if (de_iir & DE_AUX_CHANNEL_A_IVB)
2117 dp_aux_irq_handler(dev);
2119 if (de_iir & DE_GSE_IVB)
2120 intel_opregion_asle_intr(dev);
2122 for_each_pipe(dev_priv, pipe) {
2123 if (de_iir & (DE_PIPE_VBLANK_IVB(pipe)) &&
2124 intel_pipe_handle_vblank(dev, pipe))
2125 intel_check_page_flip(dev, pipe);
2127 /* plane/pipes map 1:1 on ilk+ */
2128 if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe)) {
2129 intel_prepare_page_flip(dev, pipe);
2130 intel_finish_page_flip_plane(dev, pipe);
2134 /* check event from PCH */
2135 if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
2136 u32 pch_iir = I915_READ(SDEIIR);
2138 cpt_irq_handler(dev, pch_iir);
2140 /* clear PCH hotplug event before clear CPU irq */
2141 I915_WRITE(SDEIIR, pch_iir);
2146 * To handle irqs with the minimum potential races with fresh interrupts, we:
2147 * 1 - Disable Master Interrupt Control.
2148 * 2 - Find the source(s) of the interrupt.
2149 * 3 - Clear the Interrupt Identity bits (IIR).
2150 * 4 - Process the interrupt(s) that had bits set in the IIRs.
2151 * 5 - Re-enable Master Interrupt Control.
2153 static irqreturn_t ironlake_irq_handler(int irq, void *arg)
2155 struct drm_device *dev = arg;
2156 struct drm_i915_private *dev_priv = dev->dev_private;
2157 u32 de_iir, gt_iir, de_ier, sde_ier = 0;
2158 irqreturn_t ret = IRQ_NONE;
2160 if (!intel_irqs_enabled(dev_priv))
2163 /* We get interrupts on unclaimed registers, so check for this before we
2164 * do any I915_{READ,WRITE}. */
2165 intel_uncore_check_errors(dev);
2167 /* disable master interrupt before clearing iir */
2168 de_ier = I915_READ(DEIER);
2169 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
2170 POSTING_READ(DEIER);
2172 /* Disable south interrupts. We'll only write to SDEIIR once, so further
2173 * interrupts will will be stored on its back queue, and then we'll be
2174 * able to process them after we restore SDEIER (as soon as we restore
2175 * it, we'll get an interrupt if SDEIIR still has something to process
2176 * due to its back queue). */
2177 if (!HAS_PCH_NOP(dev)) {
2178 sde_ier = I915_READ(SDEIER);
2179 I915_WRITE(SDEIER, 0);
2180 POSTING_READ(SDEIER);
2183 /* Find, clear, then process each source of interrupt */
2185 gt_iir = I915_READ(GTIIR);
2187 I915_WRITE(GTIIR, gt_iir);
2189 if (INTEL_INFO(dev)->gen >= 6)
2190 snb_gt_irq_handler(dev, dev_priv, gt_iir);
2192 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
2195 de_iir = I915_READ(DEIIR);
2197 I915_WRITE(DEIIR, de_iir);
2199 if (INTEL_INFO(dev)->gen >= 7)
2200 ivb_display_irq_handler(dev, de_iir);
2202 ilk_display_irq_handler(dev, de_iir);
2205 if (INTEL_INFO(dev)->gen >= 6) {
2206 u32 pm_iir = I915_READ(GEN6_PMIIR);
2208 I915_WRITE(GEN6_PMIIR, pm_iir);
2210 gen6_rps_irq_handler(dev_priv, pm_iir);
2214 I915_WRITE(DEIER, de_ier);
2215 POSTING_READ(DEIER);
2216 if (!HAS_PCH_NOP(dev)) {
2217 I915_WRITE(SDEIER, sde_ier);
2218 POSTING_READ(SDEIER);
2224 static irqreturn_t gen8_irq_handler(int irq, void *arg)
2226 struct drm_device *dev = arg;
2227 struct drm_i915_private *dev_priv = dev->dev_private;
2229 irqreturn_t ret = IRQ_NONE;
2232 u32 aux_mask = GEN8_AUX_CHANNEL_A;
2234 if (!intel_irqs_enabled(dev_priv))
2238 aux_mask |= GEN9_AUX_CHANNEL_B | GEN9_AUX_CHANNEL_C |
2241 master_ctl = I915_READ(GEN8_MASTER_IRQ);
2242 master_ctl &= ~GEN8_MASTER_IRQ_CONTROL;
2246 I915_WRITE(GEN8_MASTER_IRQ, 0);
2247 POSTING_READ(GEN8_MASTER_IRQ);
2249 /* Find, clear, then process each source of interrupt */
2251 ret = gen8_gt_irq_handler(dev, dev_priv, master_ctl);
2253 if (master_ctl & GEN8_DE_MISC_IRQ) {
2254 tmp = I915_READ(GEN8_DE_MISC_IIR);
2256 I915_WRITE(GEN8_DE_MISC_IIR, tmp);
2258 if (tmp & GEN8_DE_MISC_GSE)
2259 intel_opregion_asle_intr(dev);
2261 DRM_ERROR("Unexpected DE Misc interrupt\n");
2264 DRM_ERROR("The master control interrupt lied (DE MISC)!\n");
2267 if (master_ctl & GEN8_DE_PORT_IRQ) {
2268 tmp = I915_READ(GEN8_DE_PORT_IIR);
2270 I915_WRITE(GEN8_DE_PORT_IIR, tmp);
2274 dp_aux_irq_handler(dev);
2276 DRM_ERROR("Unexpected DE Port interrupt\n");
2279 DRM_ERROR("The master control interrupt lied (DE PORT)!\n");
2282 for_each_pipe(dev_priv, pipe) {
2283 uint32_t pipe_iir, flip_done = 0, fault_errors = 0;
2285 if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe)))
2288 pipe_iir = I915_READ(GEN8_DE_PIPE_IIR(pipe));
2291 I915_WRITE(GEN8_DE_PIPE_IIR(pipe), pipe_iir);
2293 if (pipe_iir & GEN8_PIPE_VBLANK &&
2294 intel_pipe_handle_vblank(dev, pipe))
2295 intel_check_page_flip(dev, pipe);
2298 flip_done = pipe_iir & GEN9_PIPE_PLANE1_FLIP_DONE;
2300 flip_done = pipe_iir & GEN8_PIPE_PRIMARY_FLIP_DONE;
2303 intel_prepare_page_flip(dev, pipe);
2304 intel_finish_page_flip_plane(dev, pipe);
2307 if (pipe_iir & GEN8_PIPE_CDCLK_CRC_DONE)
2308 hsw_pipe_crc_irq_handler(dev, pipe);
2310 if (pipe_iir & GEN8_PIPE_FIFO_UNDERRUN)
2311 intel_cpu_fifo_underrun_irq_handler(dev_priv,
2316 fault_errors = pipe_iir & GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
2318 fault_errors = pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
2321 DRM_ERROR("Fault errors on pipe %c\n: 0x%08x",
2323 pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS);
2325 DRM_ERROR("The master control interrupt lied (DE PIPE)!\n");
2328 if (!HAS_PCH_NOP(dev) && master_ctl & GEN8_DE_PCH_IRQ) {
2330 * FIXME(BDW): Assume for now that the new interrupt handling
2331 * scheme also closed the SDE interrupt handling race we've seen
2332 * on older pch-split platforms. But this needs testing.
2334 u32 pch_iir = I915_READ(SDEIIR);
2336 I915_WRITE(SDEIIR, pch_iir);
2338 cpt_irq_handler(dev, pch_iir);
2340 DRM_ERROR("The master control interrupt lied (SDE)!\n");
2344 I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
2345 POSTING_READ(GEN8_MASTER_IRQ);
2350 static void i915_error_wake_up(struct drm_i915_private *dev_priv,
2351 bool reset_completed)
2353 struct intel_engine_cs *ring;
2357 * Notify all waiters for GPU completion events that reset state has
2358 * been changed, and that they need to restart their wait after
2359 * checking for potential errors (and bail out to drop locks if there is
2360 * a gpu reset pending so that i915_error_work_func can acquire them).
2363 /* Wake up __wait_seqno, potentially holding dev->struct_mutex. */
2364 for_each_ring(ring, dev_priv, i)
2365 wake_up_all(&ring->irq_queue);
2367 /* Wake up intel_crtc_wait_for_pending_flips, holding crtc->mutex. */
2368 wake_up_all(&dev_priv->pending_flip_queue);
2371 * Signal tasks blocked in i915_gem_wait_for_error that the pending
2372 * reset state is cleared.
2374 if (reset_completed)
2375 wake_up_all(&dev_priv->gpu_error.reset_queue);
2379 * i915_reset_and_wakeup - do process context error handling work
2381 * Fire an error uevent so userspace can see that a hang or error
2384 static void i915_reset_and_wakeup(struct drm_device *dev)
2386 struct drm_i915_private *dev_priv = to_i915(dev);
2387 struct i915_gpu_error *error = &dev_priv->gpu_error;
2388 char *error_event[] = { I915_ERROR_UEVENT "=1", NULL };
2389 char *reset_event[] = { I915_RESET_UEVENT "=1", NULL };
2390 char *reset_done_event[] = { I915_ERROR_UEVENT "=0", NULL };
2393 kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, error_event);
2396 * Note that there's only one work item which does gpu resets, so we
2397 * need not worry about concurrent gpu resets potentially incrementing
2398 * error->reset_counter twice. We only need to take care of another
2399 * racing irq/hangcheck declaring the gpu dead for a second time. A
2400 * quick check for that is good enough: schedule_work ensures the
2401 * correct ordering between hang detection and this work item, and since
2402 * the reset in-progress bit is only ever set by code outside of this
2403 * work we don't need to worry about any other races.
2405 if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) {
2406 DRM_DEBUG_DRIVER("resetting chip\n");
2407 kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE,
2411 * In most cases it's guaranteed that we get here with an RPM
2412 * reference held, for example because there is a pending GPU
2413 * request that won't finish until the reset is done. This
2414 * isn't the case at least when we get here by doing a
2415 * simulated reset via debugs, so get an RPM reference.
2417 intel_runtime_pm_get(dev_priv);
2419 intel_prepare_reset(dev);
2422 * All state reset _must_ be completed before we update the
2423 * reset counter, for otherwise waiters might miss the reset
2424 * pending state and not properly drop locks, resulting in
2425 * deadlocks with the reset work.
2427 ret = i915_reset(dev);
2429 intel_finish_reset(dev);
2431 intel_runtime_pm_put(dev_priv);
2435 * After all the gem state is reset, increment the reset
2436 * counter and wake up everyone waiting for the reset to
2439 * Since unlock operations are a one-sided barrier only,
2440 * we need to insert a barrier here to order any seqno
2442 * the counter increment.
2444 smp_mb__before_atomic();
2445 atomic_inc(&dev_priv->gpu_error.reset_counter);
2447 kobject_uevent_env(&dev->primary->kdev->kobj,
2448 KOBJ_CHANGE, reset_done_event);
2450 atomic_set_mask(I915_WEDGED, &error->reset_counter);
2454 * Note: The wake_up also serves as a memory barrier so that
2455 * waiters see the update value of the reset counter atomic_t.
2457 i915_error_wake_up(dev_priv, true);
2461 static void i915_report_and_clear_eir(struct drm_device *dev)
2463 struct drm_i915_private *dev_priv = dev->dev_private;
2464 uint32_t instdone[I915_NUM_INSTDONE_REG];
2465 u32 eir = I915_READ(EIR);
2471 pr_err("render error detected, EIR: 0x%08x\n", eir);
2473 i915_get_extra_instdone(dev, instdone);
2476 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
2477 u32 ipeir = I915_READ(IPEIR_I965);
2479 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2480 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2481 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2482 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2483 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2484 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2485 I915_WRITE(IPEIR_I965, ipeir);
2486 POSTING_READ(IPEIR_I965);
2488 if (eir & GM45_ERROR_PAGE_TABLE) {
2489 u32 pgtbl_err = I915_READ(PGTBL_ER);
2490 pr_err("page table error\n");
2491 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2492 I915_WRITE(PGTBL_ER, pgtbl_err);
2493 POSTING_READ(PGTBL_ER);
2497 if (!IS_GEN2(dev)) {
2498 if (eir & I915_ERROR_PAGE_TABLE) {
2499 u32 pgtbl_err = I915_READ(PGTBL_ER);
2500 pr_err("page table error\n");
2501 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2502 I915_WRITE(PGTBL_ER, pgtbl_err);
2503 POSTING_READ(PGTBL_ER);
2507 if (eir & I915_ERROR_MEMORY_REFRESH) {
2508 pr_err("memory refresh error:\n");
2509 for_each_pipe(dev_priv, pipe)
2510 pr_err("pipe %c stat: 0x%08x\n",
2511 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
2512 /* pipestat has already been acked */
2514 if (eir & I915_ERROR_INSTRUCTION) {
2515 pr_err("instruction error\n");
2516 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
2517 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2518 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2519 if (INTEL_INFO(dev)->gen < 4) {
2520 u32 ipeir = I915_READ(IPEIR);
2522 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
2523 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
2524 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
2525 I915_WRITE(IPEIR, ipeir);
2526 POSTING_READ(IPEIR);
2528 u32 ipeir = I915_READ(IPEIR_I965);
2530 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2531 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2532 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2533 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2534 I915_WRITE(IPEIR_I965, ipeir);
2535 POSTING_READ(IPEIR_I965);
2539 I915_WRITE(EIR, eir);
2541 eir = I915_READ(EIR);
2544 * some errors might have become stuck,
2547 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
2548 I915_WRITE(EMR, I915_READ(EMR) | eir);
2549 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2554 * i915_handle_error - handle a gpu error
2557 * Do some basic checking of regsiter state at error time and
2558 * dump it to the syslog. Also call i915_capture_error_state() to make
2559 * sure we get a record and make it available in debugfs. Fire a uevent
2560 * so userspace knows something bad happened (should trigger collection
2561 * of a ring dump etc.).
2563 void i915_handle_error(struct drm_device *dev, bool wedged,
2564 const char *fmt, ...)
2566 struct drm_i915_private *dev_priv = dev->dev_private;
2570 va_start(args, fmt);
2571 vscnprintf(error_msg, sizeof(error_msg), fmt, args);
2574 i915_capture_error_state(dev, wedged, error_msg);
2575 i915_report_and_clear_eir(dev);
2578 atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG,
2579 &dev_priv->gpu_error.reset_counter);
2582 * Wakeup waiting processes so that the reset function
2583 * i915_reset_and_wakeup doesn't deadlock trying to grab
2584 * various locks. By bumping the reset counter first, the woken
2585 * processes will see a reset in progress and back off,
2586 * releasing their locks and then wait for the reset completion.
2587 * We must do this for _all_ gpu waiters that might hold locks
2588 * that the reset work needs to acquire.
2590 * Note: The wake_up serves as the required memory barrier to
2591 * ensure that the waiters see the updated value of the reset
2594 i915_error_wake_up(dev_priv, false);
2597 i915_reset_and_wakeup(dev);
2600 /* Called from drm generic code, passed 'crtc' which
2601 * we use as a pipe index
2603 static int i915_enable_vblank(struct drm_device *dev, int pipe)
2605 struct drm_i915_private *dev_priv = dev->dev_private;
2606 unsigned long irqflags;
2608 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2609 if (INTEL_INFO(dev)->gen >= 4)
2610 i915_enable_pipestat(dev_priv, pipe,
2611 PIPE_START_VBLANK_INTERRUPT_STATUS);
2613 i915_enable_pipestat(dev_priv, pipe,
2614 PIPE_VBLANK_INTERRUPT_STATUS);
2615 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2620 static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
2622 struct drm_i915_private *dev_priv = dev->dev_private;
2623 unsigned long irqflags;
2624 uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
2625 DE_PIPE_VBLANK(pipe);
2627 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2628 ironlake_enable_display_irq(dev_priv, bit);
2629 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2634 static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
2636 struct drm_i915_private *dev_priv = dev->dev_private;
2637 unsigned long irqflags;
2639 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2640 i915_enable_pipestat(dev_priv, pipe,
2641 PIPE_START_VBLANK_INTERRUPT_STATUS);
2642 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2647 static int gen8_enable_vblank(struct drm_device *dev, int pipe)
2649 struct drm_i915_private *dev_priv = dev->dev_private;
2650 unsigned long irqflags;
2652 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2653 dev_priv->de_irq_mask[pipe] &= ~GEN8_PIPE_VBLANK;
2654 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
2655 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
2656 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2660 /* Called from drm generic code, passed 'crtc' which
2661 * we use as a pipe index
2663 static void i915_disable_vblank(struct drm_device *dev, int pipe)
2665 struct drm_i915_private *dev_priv = dev->dev_private;
2666 unsigned long irqflags;
2668 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2669 i915_disable_pipestat(dev_priv, pipe,
2670 PIPE_VBLANK_INTERRUPT_STATUS |
2671 PIPE_START_VBLANK_INTERRUPT_STATUS);
2672 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2675 static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
2677 struct drm_i915_private *dev_priv = dev->dev_private;
2678 unsigned long irqflags;
2679 uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
2680 DE_PIPE_VBLANK(pipe);
2682 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2683 ironlake_disable_display_irq(dev_priv, bit);
2684 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2687 static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
2689 struct drm_i915_private *dev_priv = dev->dev_private;
2690 unsigned long irqflags;
2692 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2693 i915_disable_pipestat(dev_priv, pipe,
2694 PIPE_START_VBLANK_INTERRUPT_STATUS);
2695 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2698 static void gen8_disable_vblank(struct drm_device *dev, int pipe)
2700 struct drm_i915_private *dev_priv = dev->dev_private;
2701 unsigned long irqflags;
2703 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2704 dev_priv->de_irq_mask[pipe] |= GEN8_PIPE_VBLANK;
2705 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
2706 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
2707 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2710 static struct drm_i915_gem_request *
2711 ring_last_request(struct intel_engine_cs *ring)
2713 return list_entry(ring->request_list.prev,
2714 struct drm_i915_gem_request, list);
2718 ring_idle(struct intel_engine_cs *ring)
2720 return (list_empty(&ring->request_list) ||
2721 i915_gem_request_completed(ring_last_request(ring), false));
2725 ipehr_is_semaphore_wait(struct drm_device *dev, u32 ipehr)
2727 if (INTEL_INFO(dev)->gen >= 8) {
2728 return (ipehr >> 23) == 0x1c;
2730 ipehr &= ~MI_SEMAPHORE_SYNC_MASK;
2731 return ipehr == (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE |
2732 MI_SEMAPHORE_REGISTER);
2736 static struct intel_engine_cs *
2737 semaphore_wait_to_signaller_ring(struct intel_engine_cs *ring, u32 ipehr, u64 offset)
2739 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2740 struct intel_engine_cs *signaller;
2743 if (INTEL_INFO(dev_priv->dev)->gen >= 8) {
2744 for_each_ring(signaller, dev_priv, i) {
2745 if (ring == signaller)
2748 if (offset == signaller->semaphore.signal_ggtt[ring->id])
2752 u32 sync_bits = ipehr & MI_SEMAPHORE_SYNC_MASK;
2754 for_each_ring(signaller, dev_priv, i) {
2755 if(ring == signaller)
2758 if (sync_bits == signaller->semaphore.mbox.wait[ring->id])
2763 DRM_ERROR("No signaller ring found for ring %i, ipehr 0x%08x, offset 0x%016llx\n",
2764 ring->id, ipehr, offset);
2769 static struct intel_engine_cs *
2770 semaphore_waits_for(struct intel_engine_cs *ring, u32 *seqno)
2772 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2773 u32 cmd, ipehr, head;
2777 ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
2778 if (!ipehr_is_semaphore_wait(ring->dev, ipehr))
2782 * HEAD is likely pointing to the dword after the actual command,
2783 * so scan backwards until we find the MBOX. But limit it to just 3
2784 * or 4 dwords depending on the semaphore wait command size.
2785 * Note that we don't care about ACTHD here since that might
2786 * point at at batch, and semaphores are always emitted into the
2787 * ringbuffer itself.
2789 head = I915_READ_HEAD(ring) & HEAD_ADDR;
2790 backwards = (INTEL_INFO(ring->dev)->gen >= 8) ? 5 : 4;
2792 for (i = backwards; i; --i) {
2794 * Be paranoid and presume the hw has gone off into the wild -
2795 * our ring is smaller than what the hardware (and hence
2796 * HEAD_ADDR) allows. Also handles wrap-around.
2798 head &= ring->buffer->size - 1;
2800 /* This here seems to blow up */
2801 cmd = ioread32(ring->buffer->virtual_start + head);
2811 *seqno = ioread32(ring->buffer->virtual_start + head + 4) + 1;
2812 if (INTEL_INFO(ring->dev)->gen >= 8) {
2813 offset = ioread32(ring->buffer->virtual_start + head + 12);
2815 offset = ioread32(ring->buffer->virtual_start + head + 8);
2817 return semaphore_wait_to_signaller_ring(ring, ipehr, offset);
2820 static int semaphore_passed(struct intel_engine_cs *ring)
2822 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2823 struct intel_engine_cs *signaller;
2826 ring->hangcheck.deadlock++;
2828 signaller = semaphore_waits_for(ring, &seqno);
2829 if (signaller == NULL)
2832 /* Prevent pathological recursion due to driver bugs */
2833 if (signaller->hangcheck.deadlock >= I915_NUM_RINGS)
2836 if (i915_seqno_passed(signaller->get_seqno(signaller, false), seqno))
2839 /* cursory check for an unkickable deadlock */
2840 if (I915_READ_CTL(signaller) & RING_WAIT_SEMAPHORE &&
2841 semaphore_passed(signaller) < 0)
2847 static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv)
2849 struct intel_engine_cs *ring;
2852 for_each_ring(ring, dev_priv, i)
2853 ring->hangcheck.deadlock = 0;
2856 static enum intel_ring_hangcheck_action
2857 ring_stuck(struct intel_engine_cs *ring, u64 acthd)
2859 struct drm_device *dev = ring->dev;
2860 struct drm_i915_private *dev_priv = dev->dev_private;
2863 if (acthd != ring->hangcheck.acthd) {
2864 if (acthd > ring->hangcheck.max_acthd) {
2865 ring->hangcheck.max_acthd = acthd;
2866 return HANGCHECK_ACTIVE;
2869 return HANGCHECK_ACTIVE_LOOP;
2873 return HANGCHECK_HUNG;
2875 /* Is the chip hanging on a WAIT_FOR_EVENT?
2876 * If so we can simply poke the RB_WAIT bit
2877 * and break the hang. This should work on
2878 * all but the second generation chipsets.
2880 tmp = I915_READ_CTL(ring);
2881 if (tmp & RING_WAIT) {
2882 i915_handle_error(dev, false,
2883 "Kicking stuck wait on %s",
2885 I915_WRITE_CTL(ring, tmp);
2886 return HANGCHECK_KICK;
2889 if (INTEL_INFO(dev)->gen >= 6 && tmp & RING_WAIT_SEMAPHORE) {
2890 switch (semaphore_passed(ring)) {
2892 return HANGCHECK_HUNG;
2894 i915_handle_error(dev, false,
2895 "Kicking stuck semaphore on %s",
2897 I915_WRITE_CTL(ring, tmp);
2898 return HANGCHECK_KICK;
2900 return HANGCHECK_WAIT;
2904 return HANGCHECK_HUNG;
2908 * This is called when the chip hasn't reported back with completed
2909 * batchbuffers in a long time. We keep track per ring seqno progress and
2910 * if there are no progress, hangcheck score for that ring is increased.
2911 * Further, acthd is inspected to see if the ring is stuck. On stuck case
2912 * we kick the ring. If we see no progress on three subsequent calls
2913 * we assume chip is wedged and try to fix it by resetting the chip.
2915 static void i915_hangcheck_elapsed(struct work_struct *work)
2917 struct drm_i915_private *dev_priv =
2918 container_of(work, typeof(*dev_priv),
2919 gpu_error.hangcheck_work.work);
2920 struct drm_device *dev = dev_priv->dev;
2921 struct intel_engine_cs *ring;
2923 int busy_count = 0, rings_hung = 0;
2924 bool stuck[I915_NUM_RINGS] = { 0 };
2929 if (!i915.enable_hangcheck)
2932 for_each_ring(ring, dev_priv, i) {
2937 semaphore_clear_deadlocks(dev_priv);
2939 seqno = ring->get_seqno(ring, false);
2940 acthd = intel_ring_get_active_head(ring);
2942 if (ring->hangcheck.seqno == seqno) {
2943 if (ring_idle(ring)) {
2944 ring->hangcheck.action = HANGCHECK_IDLE;
2946 if (waitqueue_active(&ring->irq_queue)) {
2947 /* Issue a wake-up to catch stuck h/w. */
2948 if (!test_and_set_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings)) {
2949 if (!(dev_priv->gpu_error.test_irq_rings & intel_ring_flag(ring)))
2950 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
2953 DRM_INFO("Fake missed irq on %s\n",
2955 wake_up_all(&ring->irq_queue);
2957 /* Safeguard against driver failure */
2958 ring->hangcheck.score += BUSY;
2962 /* We always increment the hangcheck score
2963 * if the ring is busy and still processing
2964 * the same request, so that no single request
2965 * can run indefinitely (such as a chain of
2966 * batches). The only time we do not increment
2967 * the hangcheck score on this ring, if this
2968 * ring is in a legitimate wait for another
2969 * ring. In that case the waiting ring is a
2970 * victim and we want to be sure we catch the
2971 * right culprit. Then every time we do kick
2972 * the ring, add a small increment to the
2973 * score so that we can catch a batch that is
2974 * being repeatedly kicked and so responsible
2975 * for stalling the machine.
2977 ring->hangcheck.action = ring_stuck(ring,
2980 switch (ring->hangcheck.action) {
2981 case HANGCHECK_IDLE:
2982 case HANGCHECK_WAIT:
2983 case HANGCHECK_ACTIVE:
2985 case HANGCHECK_ACTIVE_LOOP:
2986 ring->hangcheck.score += BUSY;
2988 case HANGCHECK_KICK:
2989 ring->hangcheck.score += KICK;
2991 case HANGCHECK_HUNG:
2992 ring->hangcheck.score += HUNG;
2998 ring->hangcheck.action = HANGCHECK_ACTIVE;
3000 /* Gradually reduce the count so that we catch DoS
3001 * attempts across multiple batches.
3003 if (ring->hangcheck.score > 0)
3004 ring->hangcheck.score--;
3006 ring->hangcheck.acthd = ring->hangcheck.max_acthd = 0;
3009 ring->hangcheck.seqno = seqno;
3010 ring->hangcheck.acthd = acthd;
3014 for_each_ring(ring, dev_priv, i) {
3015 if (ring->hangcheck.score >= HANGCHECK_SCORE_RING_HUNG) {
3016 DRM_INFO("%s on %s\n",
3017 stuck[i] ? "stuck" : "no progress",
3024 return i915_handle_error(dev, true, "Ring hung");
3027 /* Reset timer case chip hangs without another request
3029 i915_queue_hangcheck(dev);
3032 void i915_queue_hangcheck(struct drm_device *dev)
3034 struct i915_gpu_error *e = &to_i915(dev)->gpu_error;
3036 if (!i915.enable_hangcheck)
3039 /* Don't continually defer the hangcheck so that it is always run at
3040 * least once after work has been scheduled on any ring. Otherwise,
3041 * we will ignore a hung ring if a second ring is kept busy.
3044 queue_delayed_work(e->hangcheck_wq, &e->hangcheck_work,
3045 round_jiffies_up_relative(DRM_I915_HANGCHECK_JIFFIES));
3048 static void ibx_irq_reset(struct drm_device *dev)
3050 struct drm_i915_private *dev_priv = dev->dev_private;
3052 if (HAS_PCH_NOP(dev))
3055 GEN5_IRQ_RESET(SDE);
3057 if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev))
3058 I915_WRITE(SERR_INT, 0xffffffff);
3062 * SDEIER is also touched by the interrupt handler to work around missed PCH
3063 * interrupts. Hence we can't update it after the interrupt handler is enabled -
3064 * instead we unconditionally enable all PCH interrupt sources here, but then
3065 * only unmask them as needed with SDEIMR.
3067 * This function needs to be called before interrupts are enabled.
3069 static void ibx_irq_pre_postinstall(struct drm_device *dev)
3071 struct drm_i915_private *dev_priv = dev->dev_private;
3073 if (HAS_PCH_NOP(dev))
3076 WARN_ON(I915_READ(SDEIER) != 0);
3077 I915_WRITE(SDEIER, 0xffffffff);
3078 POSTING_READ(SDEIER);
3081 static void gen5_gt_irq_reset(struct drm_device *dev)
3083 struct drm_i915_private *dev_priv = dev->dev_private;
3086 if (INTEL_INFO(dev)->gen >= 6)
3087 GEN5_IRQ_RESET(GEN6_PM);
3092 static void ironlake_irq_reset(struct drm_device *dev)
3094 struct drm_i915_private *dev_priv = dev->dev_private;
3096 I915_WRITE(HWSTAM, 0xffffffff);
3100 I915_WRITE(GEN7_ERR_INT, 0xffffffff);
3102 gen5_gt_irq_reset(dev);
3107 static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
3111 I915_WRITE(PORT_HOTPLUG_EN, 0);
3112 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3114 for_each_pipe(dev_priv, pipe)
3115 I915_WRITE(PIPESTAT(pipe), 0xffff);
3117 GEN5_IRQ_RESET(VLV_);
3120 static void valleyview_irq_preinstall(struct drm_device *dev)
3122 struct drm_i915_private *dev_priv = dev->dev_private;
3125 I915_WRITE(VLV_IMR, 0);
3126 I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
3127 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
3128 I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
3130 gen5_gt_irq_reset(dev);
3132 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
3134 vlv_display_irq_reset(dev_priv);
3137 static void gen8_gt_irq_reset(struct drm_i915_private *dev_priv)
3139 GEN8_IRQ_RESET_NDX(GT, 0);
3140 GEN8_IRQ_RESET_NDX(GT, 1);
3141 GEN8_IRQ_RESET_NDX(GT, 2);
3142 GEN8_IRQ_RESET_NDX(GT, 3);
3145 static void gen8_irq_reset(struct drm_device *dev)
3147 struct drm_i915_private *dev_priv = dev->dev_private;
3150 I915_WRITE(GEN8_MASTER_IRQ, 0);
3151 POSTING_READ(GEN8_MASTER_IRQ);
3153 gen8_gt_irq_reset(dev_priv);
3155 for_each_pipe(dev_priv, pipe)
3156 if (intel_display_power_is_enabled(dev_priv,
3157 POWER_DOMAIN_PIPE(pipe)))
3158 GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
3160 GEN5_IRQ_RESET(GEN8_DE_PORT_);
3161 GEN5_IRQ_RESET(GEN8_DE_MISC_);
3162 GEN5_IRQ_RESET(GEN8_PCU_);
3167 void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
3168 unsigned int pipe_mask)
3170 uint32_t extra_ier = GEN8_PIPE_VBLANK | GEN8_PIPE_FIFO_UNDERRUN;
3172 spin_lock_irq(&dev_priv->irq_lock);
3173 if (pipe_mask & 1 << PIPE_A)
3174 GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_A,
3175 dev_priv->de_irq_mask[PIPE_A],
3176 ~dev_priv->de_irq_mask[PIPE_A] | extra_ier);
3177 if (pipe_mask & 1 << PIPE_B)
3178 GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_B,
3179 dev_priv->de_irq_mask[PIPE_B],
3180 ~dev_priv->de_irq_mask[PIPE_B] | extra_ier);
3181 if (pipe_mask & 1 << PIPE_C)
3182 GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_C,
3183 dev_priv->de_irq_mask[PIPE_C],
3184 ~dev_priv->de_irq_mask[PIPE_C] | extra_ier);
3185 spin_unlock_irq(&dev_priv->irq_lock);
3188 static void cherryview_irq_preinstall(struct drm_device *dev)
3190 struct drm_i915_private *dev_priv = dev->dev_private;
3192 I915_WRITE(GEN8_MASTER_IRQ, 0);
3193 POSTING_READ(GEN8_MASTER_IRQ);
3195 gen8_gt_irq_reset(dev_priv);
3197 GEN5_IRQ_RESET(GEN8_PCU_);
3199 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
3201 vlv_display_irq_reset(dev_priv);
3204 static void ibx_hpd_irq_setup(struct drm_device *dev)
3206 struct drm_i915_private *dev_priv = dev->dev_private;
3207 struct intel_encoder *intel_encoder;
3208 u32 hotplug_irqs, hotplug, enabled_irqs = 0;
3210 if (HAS_PCH_IBX(dev)) {
3211 hotplug_irqs = SDE_HOTPLUG_MASK;
3212 for_each_intel_encoder(dev, intel_encoder)
3213 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
3214 enabled_irqs |= hpd_ibx[intel_encoder->hpd_pin];
3216 hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
3217 for_each_intel_encoder(dev, intel_encoder)
3218 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
3219 enabled_irqs |= hpd_cpt[intel_encoder->hpd_pin];
3222 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3225 * Enable digital hotplug on the PCH, and configure the DP short pulse
3226 * duration to 2ms (which is the minimum in the Display Port spec)
3228 * This register is the same on all known PCH chips.
3230 hotplug = I915_READ(PCH_PORT_HOTPLUG);
3231 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
3232 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
3233 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
3234 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
3235 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3238 static void ibx_irq_postinstall(struct drm_device *dev)
3240 struct drm_i915_private *dev_priv = dev->dev_private;
3243 if (HAS_PCH_NOP(dev))
3246 if (HAS_PCH_IBX(dev))
3247 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON;
3249 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
3251 GEN5_ASSERT_IIR_IS_ZERO(SDEIIR);
3252 I915_WRITE(SDEIMR, ~mask);
3255 static void gen5_gt_irq_postinstall(struct drm_device *dev)
3257 struct drm_i915_private *dev_priv = dev->dev_private;
3258 u32 pm_irqs, gt_irqs;
3260 pm_irqs = gt_irqs = 0;
3262 dev_priv->gt_irq_mask = ~0;
3263 if (HAS_L3_DPF(dev)) {
3264 /* L3 parity interrupt is always unmasked. */
3265 dev_priv->gt_irq_mask = ~GT_PARITY_ERROR(dev);
3266 gt_irqs |= GT_PARITY_ERROR(dev);
3269 gt_irqs |= GT_RENDER_USER_INTERRUPT;
3271 gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT |
3272 ILK_BSD_USER_INTERRUPT;
3274 gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
3277 GEN5_IRQ_INIT(GT, dev_priv->gt_irq_mask, gt_irqs);
3279 if (INTEL_INFO(dev)->gen >= 6) {
3281 * RPS interrupts will get enabled/disabled on demand when RPS
3282 * itself is enabled/disabled.
3285 pm_irqs |= PM_VEBOX_USER_INTERRUPT;
3287 dev_priv->pm_irq_mask = 0xffffffff;
3288 GEN5_IRQ_INIT(GEN6_PM, dev_priv->pm_irq_mask, pm_irqs);
3292 static int ironlake_irq_postinstall(struct drm_device *dev)
3294 struct drm_i915_private *dev_priv = dev->dev_private;
3295 u32 display_mask, extra_mask;
3297 if (INTEL_INFO(dev)->gen >= 7) {
3298 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
3299 DE_PCH_EVENT_IVB | DE_PLANEC_FLIP_DONE_IVB |
3300 DE_PLANEB_FLIP_DONE_IVB |
3301 DE_PLANEA_FLIP_DONE_IVB | DE_AUX_CHANNEL_A_IVB);
3302 extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |
3303 DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB);
3305 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
3306 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
3308 DE_PIPEB_CRC_DONE | DE_PIPEA_CRC_DONE |
3310 extra_mask = DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT |
3311 DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN;
3314 dev_priv->irq_mask = ~display_mask;
3316 I915_WRITE(HWSTAM, 0xeffe);
3318 ibx_irq_pre_postinstall(dev);
3320 GEN5_IRQ_INIT(DE, dev_priv->irq_mask, display_mask | extra_mask);
3322 gen5_gt_irq_postinstall(dev);
3324 ibx_irq_postinstall(dev);
3326 if (IS_IRONLAKE_M(dev)) {
3327 /* Enable PCU event interrupts
3329 * spinlocking not required here for correctness since interrupt
3330 * setup is guaranteed to run in single-threaded context. But we
3331 * need it to make the assert_spin_locked happy. */
3332 spin_lock_irq(&dev_priv->irq_lock);
3333 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
3334 spin_unlock_irq(&dev_priv->irq_lock);
3340 static void valleyview_display_irqs_install(struct drm_i915_private *dev_priv)
3346 pipestat_mask = PIPESTAT_INT_STATUS_MASK |
3347 PIPE_FIFO_UNDERRUN_STATUS;
3349 for_each_pipe(dev_priv, pipe)
3350 I915_WRITE(PIPESTAT(pipe), pipestat_mask);
3351 POSTING_READ(PIPESTAT(PIPE_A));
3353 pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV |
3354 PIPE_CRC_DONE_INTERRUPT_STATUS;
3356 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
3357 for_each_pipe(dev_priv, pipe)
3358 i915_enable_pipestat(dev_priv, pipe, pipestat_mask);
3360 iir_mask = I915_DISPLAY_PORT_INTERRUPT |
3361 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3362 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
3363 if (IS_CHERRYVIEW(dev_priv))
3364 iir_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
3365 dev_priv->irq_mask &= ~iir_mask;
3367 I915_WRITE(VLV_IIR, iir_mask);
3368 I915_WRITE(VLV_IIR, iir_mask);
3369 I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
3370 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
3371 POSTING_READ(VLV_IMR);
3374 static void valleyview_display_irqs_uninstall(struct drm_i915_private *dev_priv)
3380 iir_mask = I915_DISPLAY_PORT_INTERRUPT |
3381 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3382 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
3383 if (IS_CHERRYVIEW(dev_priv))
3384 iir_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
3386 dev_priv->irq_mask |= iir_mask;
3387 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
3388 I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
3389 I915_WRITE(VLV_IIR, iir_mask);
3390 I915_WRITE(VLV_IIR, iir_mask);
3391 POSTING_READ(VLV_IIR);
3393 pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV |
3394 PIPE_CRC_DONE_INTERRUPT_STATUS;
3396 i915_disable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
3397 for_each_pipe(dev_priv, pipe)
3398 i915_disable_pipestat(dev_priv, pipe, pipestat_mask);
3400 pipestat_mask = PIPESTAT_INT_STATUS_MASK |
3401 PIPE_FIFO_UNDERRUN_STATUS;
3403 for_each_pipe(dev_priv, pipe)
3404 I915_WRITE(PIPESTAT(pipe), pipestat_mask);
3405 POSTING_READ(PIPESTAT(PIPE_A));
3408 void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv)
3410 assert_spin_locked(&dev_priv->irq_lock);
3412 if (dev_priv->display_irqs_enabled)
3415 dev_priv->display_irqs_enabled = true;
3417 if (intel_irqs_enabled(dev_priv))
3418 valleyview_display_irqs_install(dev_priv);
3421 void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
3423 assert_spin_locked(&dev_priv->irq_lock);
3425 if (!dev_priv->display_irqs_enabled)
3428 dev_priv->display_irqs_enabled = false;
3430 if (intel_irqs_enabled(dev_priv))
3431 valleyview_display_irqs_uninstall(dev_priv);
3434 static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
3436 dev_priv->irq_mask = ~0;
3438 I915_WRITE(PORT_HOTPLUG_EN, 0);
3439 POSTING_READ(PORT_HOTPLUG_EN);
3441 I915_WRITE(VLV_IIR, 0xffffffff);
3442 I915_WRITE(VLV_IIR, 0xffffffff);
3443 I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
3444 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
3445 POSTING_READ(VLV_IMR);
3447 /* Interrupt setup is already guaranteed to be single-threaded, this is
3448 * just to make the assert_spin_locked check happy. */
3449 spin_lock_irq(&dev_priv->irq_lock);
3450 if (dev_priv->display_irqs_enabled)
3451 valleyview_display_irqs_install(dev_priv);
3452 spin_unlock_irq(&dev_priv->irq_lock);
3455 static int valleyview_irq_postinstall(struct drm_device *dev)
3457 struct drm_i915_private *dev_priv = dev->dev_private;
3459 vlv_display_irq_postinstall(dev_priv);
3461 gen5_gt_irq_postinstall(dev);
3463 /* ack & enable invalid PTE error interrupts */
3464 #if 0 /* FIXME: add support to irq handler for checking these bits */
3465 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
3466 I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
3469 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
3474 static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv)
3476 /* These are interrupts we'll toggle with the ring mask register */
3477 uint32_t gt_interrupts[] = {
3478 GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
3479 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
3480 GT_RENDER_L3_PARITY_ERROR_INTERRUPT |
3481 GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT |
3482 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_BCS_IRQ_SHIFT,
3483 GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
3484 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
3485 GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT |
3486 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS2_IRQ_SHIFT,
3488 GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT |
3489 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VECS_IRQ_SHIFT
3492 dev_priv->pm_irq_mask = 0xffffffff;
3493 GEN8_IRQ_INIT_NDX(GT, 0, ~gt_interrupts[0], gt_interrupts[0]);
3494 GEN8_IRQ_INIT_NDX(GT, 1, ~gt_interrupts[1], gt_interrupts[1]);
3496 * RPS interrupts will get enabled/disabled on demand when RPS itself
3497 * is enabled/disabled.
3499 GEN8_IRQ_INIT_NDX(GT, 2, dev_priv->pm_irq_mask, 0);
3500 GEN8_IRQ_INIT_NDX(GT, 3, ~gt_interrupts[3], gt_interrupts[3]);
3503 static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
3505 uint32_t de_pipe_masked = GEN8_PIPE_CDCLK_CRC_DONE;
3506 uint32_t de_pipe_enables;
3508 u32 aux_en = GEN8_AUX_CHANNEL_A;
3510 if (IS_GEN9(dev_priv)) {
3511 de_pipe_masked |= GEN9_PIPE_PLANE1_FLIP_DONE |
3512 GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
3513 aux_en |= GEN9_AUX_CHANNEL_B | GEN9_AUX_CHANNEL_C |
3516 de_pipe_masked |= GEN8_PIPE_PRIMARY_FLIP_DONE |
3517 GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
3519 de_pipe_enables = de_pipe_masked | GEN8_PIPE_VBLANK |
3520 GEN8_PIPE_FIFO_UNDERRUN;
3522 dev_priv->de_irq_mask[PIPE_A] = ~de_pipe_masked;
3523 dev_priv->de_irq_mask[PIPE_B] = ~de_pipe_masked;
3524 dev_priv->de_irq_mask[PIPE_C] = ~de_pipe_masked;
3526 for_each_pipe(dev_priv, pipe)
3527 if (intel_display_power_is_enabled(dev_priv,
3528 POWER_DOMAIN_PIPE(pipe)))
3529 GEN8_IRQ_INIT_NDX(DE_PIPE, pipe,
3530 dev_priv->de_irq_mask[pipe],
3533 GEN5_IRQ_INIT(GEN8_DE_PORT_, ~aux_en, aux_en);
3536 static int gen8_irq_postinstall(struct drm_device *dev)
3538 struct drm_i915_private *dev_priv = dev->dev_private;
3540 ibx_irq_pre_postinstall(dev);
3542 gen8_gt_irq_postinstall(dev_priv);
3543 gen8_de_irq_postinstall(dev_priv);
3545 ibx_irq_postinstall(dev);
3547 I915_WRITE(GEN8_MASTER_IRQ, DE_MASTER_IRQ_CONTROL);
3548 POSTING_READ(GEN8_MASTER_IRQ);
3553 static int cherryview_irq_postinstall(struct drm_device *dev)
3555 struct drm_i915_private *dev_priv = dev->dev_private;
3557 vlv_display_irq_postinstall(dev_priv);
3559 gen8_gt_irq_postinstall(dev_priv);
3561 I915_WRITE(GEN8_MASTER_IRQ, MASTER_INTERRUPT_ENABLE);
3562 POSTING_READ(GEN8_MASTER_IRQ);
3567 static void gen8_irq_uninstall(struct drm_device *dev)
3569 struct drm_i915_private *dev_priv = dev->dev_private;
3574 gen8_irq_reset(dev);
3577 static void vlv_display_irq_uninstall(struct drm_i915_private *dev_priv)
3579 /* Interrupt setup is already guaranteed to be single-threaded, this is
3580 * just to make the assert_spin_locked check happy. */
3581 spin_lock_irq(&dev_priv->irq_lock);
3582 if (dev_priv->display_irqs_enabled)
3583 valleyview_display_irqs_uninstall(dev_priv);
3584 spin_unlock_irq(&dev_priv->irq_lock);
3586 vlv_display_irq_reset(dev_priv);
3588 dev_priv->irq_mask = ~0;
3591 static void valleyview_irq_uninstall(struct drm_device *dev)
3593 struct drm_i915_private *dev_priv = dev->dev_private;
3598 I915_WRITE(VLV_MASTER_IER, 0);
3600 gen5_gt_irq_reset(dev);
3602 I915_WRITE(HWSTAM, 0xffffffff);
3604 vlv_display_irq_uninstall(dev_priv);
3607 static void cherryview_irq_uninstall(struct drm_device *dev)
3609 struct drm_i915_private *dev_priv = dev->dev_private;
3614 I915_WRITE(GEN8_MASTER_IRQ, 0);
3615 POSTING_READ(GEN8_MASTER_IRQ);
3617 gen8_gt_irq_reset(dev_priv);
3619 GEN5_IRQ_RESET(GEN8_PCU_);
3621 vlv_display_irq_uninstall(dev_priv);
3624 static void ironlake_irq_uninstall(struct drm_device *dev)
3626 struct drm_i915_private *dev_priv = dev->dev_private;
3631 ironlake_irq_reset(dev);
3634 static void i8xx_irq_preinstall(struct drm_device * dev)
3636 struct drm_i915_private *dev_priv = dev->dev_private;
3639 for_each_pipe(dev_priv, pipe)
3640 I915_WRITE(PIPESTAT(pipe), 0);
3641 I915_WRITE16(IMR, 0xffff);
3642 I915_WRITE16(IER, 0x0);
3643 POSTING_READ16(IER);
3646 static int i8xx_irq_postinstall(struct drm_device *dev)
3648 struct drm_i915_private *dev_priv = dev->dev_private;
3651 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
3653 /* Unmask the interrupts that we always want on. */
3654 dev_priv->irq_mask =
3655 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3656 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3657 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3658 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3659 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3660 I915_WRITE16(IMR, dev_priv->irq_mask);
3663 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3664 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3665 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
3666 I915_USER_INTERRUPT);
3667 POSTING_READ16(IER);
3669 /* Interrupt setup is already guaranteed to be single-threaded, this is
3670 * just to make the assert_spin_locked check happy. */
3671 spin_lock_irq(&dev_priv->irq_lock);
3672 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3673 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3674 spin_unlock_irq(&dev_priv->irq_lock);
3680 * Returns true when a page flip has completed.
3682 static bool i8xx_handle_vblank(struct drm_device *dev,
3683 int plane, int pipe, u32 iir)
3685 struct drm_i915_private *dev_priv = dev->dev_private;
3686 u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
3688 if (!intel_pipe_handle_vblank(dev, pipe))
3691 if ((iir & flip_pending) == 0)
3692 goto check_page_flip;
3694 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3695 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3696 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3697 * the flip is completed (no longer pending). Since this doesn't raise
3698 * an interrupt per se, we watch for the change at vblank.
3700 if (I915_READ16(ISR) & flip_pending)
3701 goto check_page_flip;
3703 intel_prepare_page_flip(dev, plane);
3704 intel_finish_page_flip(dev, pipe);
3708 intel_check_page_flip(dev, pipe);
3712 static irqreturn_t i8xx_irq_handler(int irq, void *arg)
3714 struct drm_device *dev = arg;
3715 struct drm_i915_private *dev_priv = dev->dev_private;
3720 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3721 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3723 if (!intel_irqs_enabled(dev_priv))
3726 iir = I915_READ16(IIR);
3730 while (iir & ~flip_mask) {
3731 /* Can't rely on pipestat interrupt bit in iir as it might
3732 * have been cleared after the pipestat interrupt was received.
3733 * It doesn't set the bit in iir again, but it still produces
3734 * interrupts (for non-MSI).
3736 spin_lock(&dev_priv->irq_lock);
3737 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3738 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
3740 for_each_pipe(dev_priv, pipe) {
3741 int reg = PIPESTAT(pipe);
3742 pipe_stats[pipe] = I915_READ(reg);
3745 * Clear the PIPE*STAT regs before the IIR
3747 if (pipe_stats[pipe] & 0x8000ffff)
3748 I915_WRITE(reg, pipe_stats[pipe]);
3750 spin_unlock(&dev_priv->irq_lock);
3752 I915_WRITE16(IIR, iir & ~flip_mask);
3753 new_iir = I915_READ16(IIR); /* Flush posted writes */
3755 if (iir & I915_USER_INTERRUPT)
3756 notify_ring(dev, &dev_priv->ring[RCS]);
3758 for_each_pipe(dev_priv, pipe) {
3763 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
3764 i8xx_handle_vblank(dev, plane, pipe, iir))
3765 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
3767 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
3768 i9xx_pipe_crc_irq_handler(dev, pipe);
3770 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3771 intel_cpu_fifo_underrun_irq_handler(dev_priv,
3781 static void i8xx_irq_uninstall(struct drm_device * dev)
3783 struct drm_i915_private *dev_priv = dev->dev_private;
3786 for_each_pipe(dev_priv, pipe) {
3787 /* Clear enable bits; then clear status bits */
3788 I915_WRITE(PIPESTAT(pipe), 0);
3789 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
3791 I915_WRITE16(IMR, 0xffff);
3792 I915_WRITE16(IER, 0x0);
3793 I915_WRITE16(IIR, I915_READ16(IIR));
3796 static void i915_irq_preinstall(struct drm_device * dev)
3798 struct drm_i915_private *dev_priv = dev->dev_private;
3801 if (I915_HAS_HOTPLUG(dev)) {
3802 I915_WRITE(PORT_HOTPLUG_EN, 0);
3803 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3806 I915_WRITE16(HWSTAM, 0xeffe);
3807 for_each_pipe(dev_priv, pipe)
3808 I915_WRITE(PIPESTAT(pipe), 0);
3809 I915_WRITE(IMR, 0xffffffff);
3810 I915_WRITE(IER, 0x0);
3814 static int i915_irq_postinstall(struct drm_device *dev)
3816 struct drm_i915_private *dev_priv = dev->dev_private;
3819 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
3821 /* Unmask the interrupts that we always want on. */
3822 dev_priv->irq_mask =
3823 ~(I915_ASLE_INTERRUPT |
3824 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3825 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3826 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3827 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3828 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3831 I915_ASLE_INTERRUPT |
3832 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3833 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3834 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
3835 I915_USER_INTERRUPT;
3837 if (I915_HAS_HOTPLUG(dev)) {
3838 I915_WRITE(PORT_HOTPLUG_EN, 0);
3839 POSTING_READ(PORT_HOTPLUG_EN);
3841 /* Enable in IER... */
3842 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
3843 /* and unmask in IMR */
3844 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
3847 I915_WRITE(IMR, dev_priv->irq_mask);
3848 I915_WRITE(IER, enable_mask);
3851 i915_enable_asle_pipestat(dev);
3853 /* Interrupt setup is already guaranteed to be single-threaded, this is
3854 * just to make the assert_spin_locked check happy. */
3855 spin_lock_irq(&dev_priv->irq_lock);
3856 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3857 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3858 spin_unlock_irq(&dev_priv->irq_lock);
3864 * Returns true when a page flip has completed.
3866 static bool i915_handle_vblank(struct drm_device *dev,
3867 int plane, int pipe, u32 iir)
3869 struct drm_i915_private *dev_priv = dev->dev_private;
3870 u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
3872 if (!intel_pipe_handle_vblank(dev, pipe))
3875 if ((iir & flip_pending) == 0)
3876 goto check_page_flip;
3878 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3879 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3880 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3881 * the flip is completed (no longer pending). Since this doesn't raise
3882 * an interrupt per se, we watch for the change at vblank.
3884 if (I915_READ(ISR) & flip_pending)
3885 goto check_page_flip;
3887 intel_prepare_page_flip(dev, plane);
3888 intel_finish_page_flip(dev, pipe);
3892 intel_check_page_flip(dev, pipe);
3896 static irqreturn_t i915_irq_handler(int irq, void *arg)
3898 struct drm_device *dev = arg;
3899 struct drm_i915_private *dev_priv = dev->dev_private;
3900 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
3902 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3903 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3904 int pipe, ret = IRQ_NONE;
3906 if (!intel_irqs_enabled(dev_priv))
3909 iir = I915_READ(IIR);
3911 bool irq_received = (iir & ~flip_mask) != 0;
3912 bool blc_event = false;
3914 /* Can't rely on pipestat interrupt bit in iir as it might
3915 * have been cleared after the pipestat interrupt was received.
3916 * It doesn't set the bit in iir again, but it still produces
3917 * interrupts (for non-MSI).
3919 spin_lock(&dev_priv->irq_lock);
3920 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3921 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
3923 for_each_pipe(dev_priv, pipe) {
3924 int reg = PIPESTAT(pipe);
3925 pipe_stats[pipe] = I915_READ(reg);
3927 /* Clear the PIPE*STAT regs before the IIR */
3928 if (pipe_stats[pipe] & 0x8000ffff) {
3929 I915_WRITE(reg, pipe_stats[pipe]);
3930 irq_received = true;
3933 spin_unlock(&dev_priv->irq_lock);
3938 /* Consume port. Then clear IIR or we'll miss events */
3939 if (I915_HAS_HOTPLUG(dev) &&
3940 iir & I915_DISPLAY_PORT_INTERRUPT)
3941 i9xx_hpd_irq_handler(dev);
3943 I915_WRITE(IIR, iir & ~flip_mask);
3944 new_iir = I915_READ(IIR); /* Flush posted writes */
3946 if (iir & I915_USER_INTERRUPT)
3947 notify_ring(dev, &dev_priv->ring[RCS]);
3949 for_each_pipe(dev_priv, pipe) {
3954 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
3955 i915_handle_vblank(dev, plane, pipe, iir))
3956 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
3958 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
3961 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
3962 i9xx_pipe_crc_irq_handler(dev, pipe);
3964 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3965 intel_cpu_fifo_underrun_irq_handler(dev_priv,
3969 if (blc_event || (iir & I915_ASLE_INTERRUPT))
3970 intel_opregion_asle_intr(dev);
3972 /* With MSI, interrupts are only generated when iir
3973 * transitions from zero to nonzero. If another bit got
3974 * set while we were handling the existing iir bits, then
3975 * we would never get another interrupt.
3977 * This is fine on non-MSI as well, as if we hit this path
3978 * we avoid exiting the interrupt handler only to generate
3981 * Note that for MSI this could cause a stray interrupt report
3982 * if an interrupt landed in the time between writing IIR and
3983 * the posting read. This should be rare enough to never
3984 * trigger the 99% of 100,000 interrupts test for disabling
3989 } while (iir & ~flip_mask);
3994 static void i915_irq_uninstall(struct drm_device * dev)
3996 struct drm_i915_private *dev_priv = dev->dev_private;
3999 if (I915_HAS_HOTPLUG(dev)) {
4000 I915_WRITE(PORT_HOTPLUG_EN, 0);
4001 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4004 I915_WRITE16(HWSTAM, 0xffff);
4005 for_each_pipe(dev_priv, pipe) {
4006 /* Clear enable bits; then clear status bits */
4007 I915_WRITE(PIPESTAT(pipe), 0);
4008 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
4010 I915_WRITE(IMR, 0xffffffff);
4011 I915_WRITE(IER, 0x0);
4013 I915_WRITE(IIR, I915_READ(IIR));
4016 static void i965_irq_preinstall(struct drm_device * dev)
4018 struct drm_i915_private *dev_priv = dev->dev_private;
4021 I915_WRITE(PORT_HOTPLUG_EN, 0);
4022 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4024 I915_WRITE(HWSTAM, 0xeffe);
4025 for_each_pipe(dev_priv, pipe)
4026 I915_WRITE(PIPESTAT(pipe), 0);
4027 I915_WRITE(IMR, 0xffffffff);
4028 I915_WRITE(IER, 0x0);
4032 static int i965_irq_postinstall(struct drm_device *dev)
4034 struct drm_i915_private *dev_priv = dev->dev_private;
4038 /* Unmask the interrupts that we always want on. */
4039 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
4040 I915_DISPLAY_PORT_INTERRUPT |
4041 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4042 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4043 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4044 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
4045 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
4047 enable_mask = ~dev_priv->irq_mask;
4048 enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4049 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
4050 enable_mask |= I915_USER_INTERRUPT;
4053 enable_mask |= I915_BSD_USER_INTERRUPT;
4055 /* Interrupt setup is already guaranteed to be single-threaded, this is
4056 * just to make the assert_spin_locked check happy. */
4057 spin_lock_irq(&dev_priv->irq_lock);
4058 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
4059 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
4060 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
4061 spin_unlock_irq(&dev_priv->irq_lock);
4064 * Enable some error detection, note the instruction error mask
4065 * bit is reserved, so we leave it masked.
4068 error_mask = ~(GM45_ERROR_PAGE_TABLE |
4069 GM45_ERROR_MEM_PRIV |
4070 GM45_ERROR_CP_PRIV |
4071 I915_ERROR_MEMORY_REFRESH);
4073 error_mask = ~(I915_ERROR_PAGE_TABLE |
4074 I915_ERROR_MEMORY_REFRESH);
4076 I915_WRITE(EMR, error_mask);
4078 I915_WRITE(IMR, dev_priv->irq_mask);
4079 I915_WRITE(IER, enable_mask);
4082 I915_WRITE(PORT_HOTPLUG_EN, 0);
4083 POSTING_READ(PORT_HOTPLUG_EN);
4085 i915_enable_asle_pipestat(dev);
4090 static void i915_hpd_irq_setup(struct drm_device *dev)
4092 struct drm_i915_private *dev_priv = dev->dev_private;
4093 struct intel_encoder *intel_encoder;
4096 assert_spin_locked(&dev_priv->irq_lock);
4098 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
4099 hotplug_en &= ~HOTPLUG_INT_EN_MASK;
4100 /* Note HDMI and DP share hotplug bits */
4101 /* enable bits are the same for all generations */
4102 for_each_intel_encoder(dev, intel_encoder)
4103 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
4104 hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin];
4105 /* Programming the CRT detection parameters tends
4106 to generate a spurious hotplug event about three
4107 seconds later. So just do it once.
4110 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
4111 hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK;
4112 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
4114 /* Ignore TV since it's buggy */
4115 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
4118 static irqreturn_t i965_irq_handler(int irq, void *arg)
4120 struct drm_device *dev = arg;
4121 struct drm_i915_private *dev_priv = dev->dev_private;
4123 u32 pipe_stats[I915_MAX_PIPES];
4124 int ret = IRQ_NONE, pipe;
4126 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4127 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
4129 if (!intel_irqs_enabled(dev_priv))
4132 iir = I915_READ(IIR);
4135 bool irq_received = (iir & ~flip_mask) != 0;
4136 bool blc_event = false;
4138 /* Can't rely on pipestat interrupt bit in iir as it might
4139 * have been cleared after the pipestat interrupt was received.
4140 * It doesn't set the bit in iir again, but it still produces
4141 * interrupts (for non-MSI).
4143 spin_lock(&dev_priv->irq_lock);
4144 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
4145 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
4147 for_each_pipe(dev_priv, pipe) {
4148 int reg = PIPESTAT(pipe);
4149 pipe_stats[pipe] = I915_READ(reg);
4152 * Clear the PIPE*STAT regs before the IIR
4154 if (pipe_stats[pipe] & 0x8000ffff) {
4155 I915_WRITE(reg, pipe_stats[pipe]);
4156 irq_received = true;
4159 spin_unlock(&dev_priv->irq_lock);
4166 /* Consume port. Then clear IIR or we'll miss events */
4167 if (iir & I915_DISPLAY_PORT_INTERRUPT)
4168 i9xx_hpd_irq_handler(dev);
4170 I915_WRITE(IIR, iir & ~flip_mask);
4171 new_iir = I915_READ(IIR); /* Flush posted writes */
4173 if (iir & I915_USER_INTERRUPT)
4174 notify_ring(dev, &dev_priv->ring[RCS]);
4175 if (iir & I915_BSD_USER_INTERRUPT)
4176 notify_ring(dev, &dev_priv->ring[VCS]);
4178 for_each_pipe(dev_priv, pipe) {
4179 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
4180 i915_handle_vblank(dev, pipe, pipe, iir))
4181 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
4183 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
4186 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
4187 i9xx_pipe_crc_irq_handler(dev, pipe);
4189 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
4190 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
4193 if (blc_event || (iir & I915_ASLE_INTERRUPT))
4194 intel_opregion_asle_intr(dev);
4196 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
4197 gmbus_irq_handler(dev);
4199 /* With MSI, interrupts are only generated when iir
4200 * transitions from zero to nonzero. If another bit got
4201 * set while we were handling the existing iir bits, then
4202 * we would never get another interrupt.
4204 * This is fine on non-MSI as well, as if we hit this path
4205 * we avoid exiting the interrupt handler only to generate
4208 * Note that for MSI this could cause a stray interrupt report
4209 * if an interrupt landed in the time between writing IIR and
4210 * the posting read. This should be rare enough to never
4211 * trigger the 99% of 100,000 interrupts test for disabling
4220 static void i965_irq_uninstall(struct drm_device * dev)
4222 struct drm_i915_private *dev_priv = dev->dev_private;
4228 I915_WRITE(PORT_HOTPLUG_EN, 0);
4229 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4231 I915_WRITE(HWSTAM, 0xffffffff);
4232 for_each_pipe(dev_priv, pipe)
4233 I915_WRITE(PIPESTAT(pipe), 0);
4234 I915_WRITE(IMR, 0xffffffff);
4235 I915_WRITE(IER, 0x0);
4237 for_each_pipe(dev_priv, pipe)
4238 I915_WRITE(PIPESTAT(pipe),
4239 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
4240 I915_WRITE(IIR, I915_READ(IIR));
4243 static void intel_hpd_irq_reenable_work(struct work_struct *work)
4245 struct drm_i915_private *dev_priv =
4246 container_of(work, typeof(*dev_priv),
4247 hotplug_reenable_work.work);
4248 struct drm_device *dev = dev_priv->dev;
4249 struct drm_mode_config *mode_config = &dev->mode_config;
4252 intel_runtime_pm_get(dev_priv);
4254 spin_lock_irq(&dev_priv->irq_lock);
4255 for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) {
4256 struct drm_connector *connector;
4258 if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED)
4261 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
4263 list_for_each_entry(connector, &mode_config->connector_list, head) {
4264 struct intel_connector *intel_connector = to_intel_connector(connector);
4266 if (intel_connector->encoder->hpd_pin == i) {
4267 if (connector->polled != intel_connector->polled)
4268 DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
4270 connector->polled = intel_connector->polled;
4271 if (!connector->polled)
4272 connector->polled = DRM_CONNECTOR_POLL_HPD;
4276 if (dev_priv->display.hpd_irq_setup)
4277 dev_priv->display.hpd_irq_setup(dev);
4278 spin_unlock_irq(&dev_priv->irq_lock);
4280 intel_runtime_pm_put(dev_priv);
4284 * intel_irq_init - initializes irq support
4285 * @dev_priv: i915 device instance
4287 * This function initializes all the irq support including work items, timers
4288 * and all the vtables. It does not setup the interrupt itself though.
4290 void intel_irq_init(struct drm_i915_private *dev_priv)
4292 struct drm_device *dev = dev_priv->dev;
4294 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
4295 INIT_WORK(&dev_priv->dig_port_work, i915_digport_work_func);
4296 INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
4297 INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
4299 /* Let's track the enabled rps events */
4300 if (IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
4301 /* WaGsvRC0ResidencyMethod:vlv */
4302 dev_priv->pm_rps_events = GEN6_PM_RP_UP_EI_EXPIRED;
4304 dev_priv->pm_rps_events = GEN6_PM_RPS_EVENTS;
4306 INIT_DELAYED_WORK(&dev_priv->gpu_error.hangcheck_work,
4307 i915_hangcheck_elapsed);
4308 INIT_DELAYED_WORK(&dev_priv->hotplug_reenable_work,
4309 intel_hpd_irq_reenable_work);
4311 pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
4313 if (IS_GEN2(dev_priv)) {
4314 dev->max_vblank_count = 0;
4315 dev->driver->get_vblank_counter = i8xx_get_vblank_counter;
4316 } else if (IS_G4X(dev_priv) || INTEL_INFO(dev_priv)->gen >= 5) {
4317 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
4318 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
4320 dev->driver->get_vblank_counter = i915_get_vblank_counter;
4321 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
4325 * Opt out of the vblank disable timer on everything except gen2.
4326 * Gen2 doesn't have a hardware frame counter and so depends on
4327 * vblank interrupts to produce sane vblank seuquence numbers.
4329 if (!IS_GEN2(dev_priv))
4330 dev->vblank_disable_immediate = true;
4332 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
4333 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
4335 if (IS_CHERRYVIEW(dev_priv)) {
4336 dev->driver->irq_handler = cherryview_irq_handler;
4337 dev->driver->irq_preinstall = cherryview_irq_preinstall;
4338 dev->driver->irq_postinstall = cherryview_irq_postinstall;
4339 dev->driver->irq_uninstall = cherryview_irq_uninstall;
4340 dev->driver->enable_vblank = valleyview_enable_vblank;
4341 dev->driver->disable_vblank = valleyview_disable_vblank;
4342 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4343 } else if (IS_VALLEYVIEW(dev_priv)) {
4344 dev->driver->irq_handler = valleyview_irq_handler;
4345 dev->driver->irq_preinstall = valleyview_irq_preinstall;
4346 dev->driver->irq_postinstall = valleyview_irq_postinstall;
4347 dev->driver->irq_uninstall = valleyview_irq_uninstall;
4348 dev->driver->enable_vblank = valleyview_enable_vblank;
4349 dev->driver->disable_vblank = valleyview_disable_vblank;
4350 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4351 } else if (INTEL_INFO(dev_priv)->gen >= 8) {
4352 dev->driver->irq_handler = gen8_irq_handler;
4353 dev->driver->irq_preinstall = gen8_irq_reset;
4354 dev->driver->irq_postinstall = gen8_irq_postinstall;
4355 dev->driver->irq_uninstall = gen8_irq_uninstall;
4356 dev->driver->enable_vblank = gen8_enable_vblank;
4357 dev->driver->disable_vblank = gen8_disable_vblank;
4358 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
4359 } else if (HAS_PCH_SPLIT(dev)) {
4360 dev->driver->irq_handler = ironlake_irq_handler;
4361 dev->driver->irq_preinstall = ironlake_irq_reset;
4362 dev->driver->irq_postinstall = ironlake_irq_postinstall;
4363 dev->driver->irq_uninstall = ironlake_irq_uninstall;
4364 dev->driver->enable_vblank = ironlake_enable_vblank;
4365 dev->driver->disable_vblank = ironlake_disable_vblank;
4366 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
4368 if (INTEL_INFO(dev_priv)->gen == 2) {
4369 dev->driver->irq_preinstall = i8xx_irq_preinstall;
4370 dev->driver->irq_postinstall = i8xx_irq_postinstall;
4371 dev->driver->irq_handler = i8xx_irq_handler;
4372 dev->driver->irq_uninstall = i8xx_irq_uninstall;
4373 } else if (INTEL_INFO(dev_priv)->gen == 3) {
4374 dev->driver->irq_preinstall = i915_irq_preinstall;
4375 dev->driver->irq_postinstall = i915_irq_postinstall;
4376 dev->driver->irq_uninstall = i915_irq_uninstall;
4377 dev->driver->irq_handler = i915_irq_handler;
4379 dev->driver->irq_preinstall = i965_irq_preinstall;
4380 dev->driver->irq_postinstall = i965_irq_postinstall;
4381 dev->driver->irq_uninstall = i965_irq_uninstall;
4382 dev->driver->irq_handler = i965_irq_handler;
4384 if (I915_HAS_HOTPLUG(dev_priv))
4385 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4386 dev->driver->enable_vblank = i915_enable_vblank;
4387 dev->driver->disable_vblank = i915_disable_vblank;
4392 * intel_hpd_init - initializes and enables hpd support
4393 * @dev_priv: i915 device instance
4395 * This function enables the hotplug support. It requires that interrupts have
4396 * already been enabled with intel_irq_init_hw(). From this point on hotplug and
4397 * poll request can run concurrently to other code, so locking rules must be
4400 * This is a separate step from interrupt enabling to simplify the locking rules
4401 * in the driver load and resume code.
4403 void intel_hpd_init(struct drm_i915_private *dev_priv)
4405 struct drm_device *dev = dev_priv->dev;
4406 struct drm_mode_config *mode_config = &dev->mode_config;
4407 struct drm_connector *connector;
4410 for (i = 1; i < HPD_NUM_PINS; i++) {
4411 dev_priv->hpd_stats[i].hpd_cnt = 0;
4412 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
4414 list_for_each_entry(connector, &mode_config->connector_list, head) {
4415 struct intel_connector *intel_connector = to_intel_connector(connector);
4416 connector->polled = intel_connector->polled;
4417 if (connector->encoder && !connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE)
4418 connector->polled = DRM_CONNECTOR_POLL_HPD;
4419 if (intel_connector->mst_port)
4420 connector->polled = DRM_CONNECTOR_POLL_HPD;
4423 /* Interrupt setup is already guaranteed to be single-threaded, this is
4424 * just to make the assert_spin_locked checks happy. */
4425 spin_lock_irq(&dev_priv->irq_lock);
4426 if (dev_priv->display.hpd_irq_setup)
4427 dev_priv->display.hpd_irq_setup(dev);
4428 spin_unlock_irq(&dev_priv->irq_lock);
4432 * intel_irq_install - enables the hardware interrupt
4433 * @dev_priv: i915 device instance
4435 * This function enables the hardware interrupt handling, but leaves the hotplug
4436 * handling still disabled. It is called after intel_irq_init().
4438 * In the driver load and resume code we need working interrupts in a few places
4439 * but don't want to deal with the hassle of concurrent probe and hotplug
4440 * workers. Hence the split into this two-stage approach.
4442 int intel_irq_install(struct drm_i915_private *dev_priv)
4445 * We enable some interrupt sources in our postinstall hooks, so mark
4446 * interrupts as enabled _before_ actually enabling them to avoid
4447 * special cases in our ordering checks.
4449 dev_priv->pm.irqs_enabled = true;
4451 return drm_irq_install(dev_priv->dev, dev_priv->dev->pdev->irq);
4455 * intel_irq_uninstall - finilizes all irq handling
4456 * @dev_priv: i915 device instance
4458 * This stops interrupt and hotplug handling and unregisters and frees all
4459 * resources acquired in the init functions.
4461 void intel_irq_uninstall(struct drm_i915_private *dev_priv)
4463 drm_irq_uninstall(dev_priv->dev);
4464 intel_hpd_cancel_work(dev_priv);
4465 dev_priv->pm.irqs_enabled = false;
4469 * intel_runtime_pm_disable_interrupts - runtime interrupt disabling
4470 * @dev_priv: i915 device instance
4472 * This function is used to disable interrupts at runtime, both in the runtime
4473 * pm and the system suspend/resume code.
4475 void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv)
4477 dev_priv->dev->driver->irq_uninstall(dev_priv->dev);
4478 dev_priv->pm.irqs_enabled = false;
4479 synchronize_irq(dev_priv->dev->irq);
4483 * intel_runtime_pm_enable_interrupts - runtime interrupt enabling
4484 * @dev_priv: i915 device instance
4486 * This function is used to enable interrupts at runtime, both in the runtime
4487 * pm and the system suspend/resume code.
4489 void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv)
4491 dev_priv->pm.irqs_enabled = true;
4492 dev_priv->dev->driver->irq_preinstall(dev_priv->dev);
4493 dev_priv->dev->driver->irq_postinstall(dev_priv->dev);