1 /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/sysrq.h>
32 #include <linux/slab.h>
33 #include <linux/circ_buf.h>
35 #include <drm/i915_drm.h>
37 #include "i915_trace.h"
38 #include "intel_drv.h"
40 static const u32 hpd_ibx
[] = {
41 [HPD_CRT
] = SDE_CRT_HOTPLUG
,
42 [HPD_SDVO_B
] = SDE_SDVOB_HOTPLUG
,
43 [HPD_PORT_B
] = SDE_PORTB_HOTPLUG
,
44 [HPD_PORT_C
] = SDE_PORTC_HOTPLUG
,
45 [HPD_PORT_D
] = SDE_PORTD_HOTPLUG
48 static const u32 hpd_cpt
[] = {
49 [HPD_CRT
] = SDE_CRT_HOTPLUG_CPT
,
50 [HPD_SDVO_B
] = SDE_SDVOB_HOTPLUG_CPT
,
51 [HPD_PORT_B
] = SDE_PORTB_HOTPLUG_CPT
,
52 [HPD_PORT_C
] = SDE_PORTC_HOTPLUG_CPT
,
53 [HPD_PORT_D
] = SDE_PORTD_HOTPLUG_CPT
56 static const u32 hpd_mask_i915
[] = {
57 [HPD_CRT
] = CRT_HOTPLUG_INT_EN
,
58 [HPD_SDVO_B
] = SDVOB_HOTPLUG_INT_EN
,
59 [HPD_SDVO_C
] = SDVOC_HOTPLUG_INT_EN
,
60 [HPD_PORT_B
] = PORTB_HOTPLUG_INT_EN
,
61 [HPD_PORT_C
] = PORTC_HOTPLUG_INT_EN
,
62 [HPD_PORT_D
] = PORTD_HOTPLUG_INT_EN
65 static const u32 hpd_status_g4x
[] = {
66 [HPD_CRT
] = CRT_HOTPLUG_INT_STATUS
,
67 [HPD_SDVO_B
] = SDVOB_HOTPLUG_INT_STATUS_G4X
,
68 [HPD_SDVO_C
] = SDVOC_HOTPLUG_INT_STATUS_G4X
,
69 [HPD_PORT_B
] = PORTB_HOTPLUG_INT_STATUS
,
70 [HPD_PORT_C
] = PORTC_HOTPLUG_INT_STATUS
,
71 [HPD_PORT_D
] = PORTD_HOTPLUG_INT_STATUS
74 static const u32 hpd_status_i915
[] = { /* i915 and valleyview are the same */
75 [HPD_CRT
] = CRT_HOTPLUG_INT_STATUS
,
76 [HPD_SDVO_B
] = SDVOB_HOTPLUG_INT_STATUS_I915
,
77 [HPD_SDVO_C
] = SDVOC_HOTPLUG_INT_STATUS_I915
,
78 [HPD_PORT_B
] = PORTB_HOTPLUG_INT_STATUS
,
79 [HPD_PORT_C
] = PORTC_HOTPLUG_INT_STATUS
,
80 [HPD_PORT_D
] = PORTD_HOTPLUG_INT_STATUS
83 /* IIR can theoretically queue up two events. Be paranoid. */
84 #define GEN8_IRQ_RESET_NDX(type, which) do { \
85 I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
86 POSTING_READ(GEN8_##type##_IMR(which)); \
87 I915_WRITE(GEN8_##type##_IER(which), 0); \
88 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
89 POSTING_READ(GEN8_##type##_IIR(which)); \
90 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
91 POSTING_READ(GEN8_##type##_IIR(which)); \
94 #define GEN5_IRQ_RESET(type) do { \
95 I915_WRITE(type##IMR, 0xffffffff); \
96 POSTING_READ(type##IMR); \
97 I915_WRITE(type##IER, 0); \
98 I915_WRITE(type##IIR, 0xffffffff); \
99 POSTING_READ(type##IIR); \
100 I915_WRITE(type##IIR, 0xffffffff); \
101 POSTING_READ(type##IIR); \
105 * We should clear IMR at preinstall/uninstall, and just check at postinstall.
107 #define GEN5_ASSERT_IIR_IS_ZERO(reg) do { \
108 u32 val = I915_READ(reg); \
110 WARN(1, "Interrupt register 0x%x is not zero: 0x%08x\n", \
112 I915_WRITE((reg), 0xffffffff); \
114 I915_WRITE((reg), 0xffffffff); \
119 #define GEN8_IRQ_INIT_NDX(type, which, imr_val, ier_val) do { \
120 GEN5_ASSERT_IIR_IS_ZERO(GEN8_##type##_IIR(which)); \
121 I915_WRITE(GEN8_##type##_IMR(which), (imr_val)); \
122 I915_WRITE(GEN8_##type##_IER(which), (ier_val)); \
123 POSTING_READ(GEN8_##type##_IER(which)); \
126 #define GEN5_IRQ_INIT(type, imr_val, ier_val) do { \
127 GEN5_ASSERT_IIR_IS_ZERO(type##IIR); \
128 I915_WRITE(type##IMR, (imr_val)); \
129 I915_WRITE(type##IER, (ier_val)); \
130 POSTING_READ(type##IER); \
133 /* For display hotplug interrupt */
135 ironlake_enable_display_irq(struct drm_i915_private
*dev_priv
, u32 mask
)
137 assert_spin_locked(&dev_priv
->irq_lock
);
139 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
142 if ((dev_priv
->irq_mask
& mask
) != 0) {
143 dev_priv
->irq_mask
&= ~mask
;
144 I915_WRITE(DEIMR
, dev_priv
->irq_mask
);
150 ironlake_disable_display_irq(struct drm_i915_private
*dev_priv
, u32 mask
)
152 assert_spin_locked(&dev_priv
->irq_lock
);
154 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
157 if ((dev_priv
->irq_mask
& mask
) != mask
) {
158 dev_priv
->irq_mask
|= mask
;
159 I915_WRITE(DEIMR
, dev_priv
->irq_mask
);
165 * ilk_update_gt_irq - update GTIMR
166 * @dev_priv: driver private
167 * @interrupt_mask: mask of interrupt bits to update
168 * @enabled_irq_mask: mask of interrupt bits to enable
170 static void ilk_update_gt_irq(struct drm_i915_private
*dev_priv
,
171 uint32_t interrupt_mask
,
172 uint32_t enabled_irq_mask
)
174 assert_spin_locked(&dev_priv
->irq_lock
);
176 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
179 dev_priv
->gt_irq_mask
&= ~interrupt_mask
;
180 dev_priv
->gt_irq_mask
|= (~enabled_irq_mask
& interrupt_mask
);
181 I915_WRITE(GTIMR
, dev_priv
->gt_irq_mask
);
185 void gen5_enable_gt_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
187 ilk_update_gt_irq(dev_priv
, mask
, mask
);
190 void gen5_disable_gt_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
192 ilk_update_gt_irq(dev_priv
, mask
, 0);
196 * snb_update_pm_irq - update GEN6_PMIMR
197 * @dev_priv: driver private
198 * @interrupt_mask: mask of interrupt bits to update
199 * @enabled_irq_mask: mask of interrupt bits to enable
201 static void snb_update_pm_irq(struct drm_i915_private
*dev_priv
,
202 uint32_t interrupt_mask
,
203 uint32_t enabled_irq_mask
)
207 assert_spin_locked(&dev_priv
->irq_lock
);
209 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
212 new_val
= dev_priv
->pm_irq_mask
;
213 new_val
&= ~interrupt_mask
;
214 new_val
|= (~enabled_irq_mask
& interrupt_mask
);
216 if (new_val
!= dev_priv
->pm_irq_mask
) {
217 dev_priv
->pm_irq_mask
= new_val
;
218 I915_WRITE(GEN6_PMIMR
, dev_priv
->pm_irq_mask
);
219 POSTING_READ(GEN6_PMIMR
);
223 void gen6_enable_pm_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
225 snb_update_pm_irq(dev_priv
, mask
, mask
);
228 void gen6_disable_pm_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
230 snb_update_pm_irq(dev_priv
, mask
, 0);
233 static bool ivb_can_enable_err_int(struct drm_device
*dev
)
235 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
236 struct intel_crtc
*crtc
;
239 assert_spin_locked(&dev_priv
->irq_lock
);
241 for_each_pipe(dev_priv
, pipe
) {
242 crtc
= to_intel_crtc(dev_priv
->pipe_to_crtc_mapping
[pipe
]);
244 if (crtc
->cpu_fifo_underrun_disabled
)
252 * bdw_update_pm_irq - update GT interrupt 2
253 * @dev_priv: driver private
254 * @interrupt_mask: mask of interrupt bits to update
255 * @enabled_irq_mask: mask of interrupt bits to enable
257 * Copied from the snb function, updated with relevant register offsets
259 static void bdw_update_pm_irq(struct drm_i915_private
*dev_priv
,
260 uint32_t interrupt_mask
,
261 uint32_t enabled_irq_mask
)
265 assert_spin_locked(&dev_priv
->irq_lock
);
267 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
270 new_val
= dev_priv
->pm_irq_mask
;
271 new_val
&= ~interrupt_mask
;
272 new_val
|= (~enabled_irq_mask
& interrupt_mask
);
274 if (new_val
!= dev_priv
->pm_irq_mask
) {
275 dev_priv
->pm_irq_mask
= new_val
;
276 I915_WRITE(GEN8_GT_IMR(2), dev_priv
->pm_irq_mask
);
277 POSTING_READ(GEN8_GT_IMR(2));
281 void gen8_enable_pm_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
283 bdw_update_pm_irq(dev_priv
, mask
, mask
);
286 void gen8_disable_pm_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
288 bdw_update_pm_irq(dev_priv
, mask
, 0);
291 static bool cpt_can_enable_serr_int(struct drm_device
*dev
)
293 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
295 struct intel_crtc
*crtc
;
297 assert_spin_locked(&dev_priv
->irq_lock
);
299 for_each_pipe(dev_priv
, pipe
) {
300 crtc
= to_intel_crtc(dev_priv
->pipe_to_crtc_mapping
[pipe
]);
302 if (crtc
->pch_fifo_underrun_disabled
)
309 void i9xx_check_fifo_underruns(struct drm_device
*dev
)
311 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
312 struct intel_crtc
*crtc
;
315 spin_lock_irqsave(&dev_priv
->irq_lock
, flags
);
317 for_each_intel_crtc(dev
, crtc
) {
318 u32 reg
= PIPESTAT(crtc
->pipe
);
321 if (crtc
->cpu_fifo_underrun_disabled
)
324 pipestat
= I915_READ(reg
) & 0xffff0000;
325 if ((pipestat
& PIPE_FIFO_UNDERRUN_STATUS
) == 0)
328 I915_WRITE(reg
, pipestat
| PIPE_FIFO_UNDERRUN_STATUS
);
331 DRM_ERROR("pipe %c underrun\n", pipe_name(crtc
->pipe
));
334 spin_unlock_irqrestore(&dev_priv
->irq_lock
, flags
);
337 static void i9xx_set_fifo_underrun_reporting(struct drm_device
*dev
,
339 bool enable
, bool old
)
341 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
342 u32 reg
= PIPESTAT(pipe
);
343 u32 pipestat
= I915_READ(reg
) & 0xffff0000;
345 assert_spin_locked(&dev_priv
->irq_lock
);
348 I915_WRITE(reg
, pipestat
| PIPE_FIFO_UNDERRUN_STATUS
);
351 if (old
&& pipestat
& PIPE_FIFO_UNDERRUN_STATUS
)
352 DRM_ERROR("pipe %c underrun\n", pipe_name(pipe
));
356 static void ironlake_set_fifo_underrun_reporting(struct drm_device
*dev
,
357 enum pipe pipe
, bool enable
)
359 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
360 uint32_t bit
= (pipe
== PIPE_A
) ? DE_PIPEA_FIFO_UNDERRUN
:
361 DE_PIPEB_FIFO_UNDERRUN
;
364 ironlake_enable_display_irq(dev_priv
, bit
);
366 ironlake_disable_display_irq(dev_priv
, bit
);
369 static void ivybridge_set_fifo_underrun_reporting(struct drm_device
*dev
,
371 bool enable
, bool old
)
373 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
375 I915_WRITE(GEN7_ERR_INT
, ERR_INT_FIFO_UNDERRUN(pipe
));
377 if (!ivb_can_enable_err_int(dev
))
380 ironlake_enable_display_irq(dev_priv
, DE_ERR_INT_IVB
);
382 ironlake_disable_display_irq(dev_priv
, DE_ERR_INT_IVB
);
385 I915_READ(GEN7_ERR_INT
) & ERR_INT_FIFO_UNDERRUN(pipe
)) {
386 DRM_ERROR("uncleared fifo underrun on pipe %c\n",
392 static void broadwell_set_fifo_underrun_reporting(struct drm_device
*dev
,
393 enum pipe pipe
, bool enable
)
395 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
397 assert_spin_locked(&dev_priv
->irq_lock
);
400 dev_priv
->de_irq_mask
[pipe
] &= ~GEN8_PIPE_FIFO_UNDERRUN
;
402 dev_priv
->de_irq_mask
[pipe
] |= GEN8_PIPE_FIFO_UNDERRUN
;
403 I915_WRITE(GEN8_DE_PIPE_IMR(pipe
), dev_priv
->de_irq_mask
[pipe
]);
404 POSTING_READ(GEN8_DE_PIPE_IMR(pipe
));
408 * ibx_display_interrupt_update - update SDEIMR
409 * @dev_priv: driver private
410 * @interrupt_mask: mask of interrupt bits to update
411 * @enabled_irq_mask: mask of interrupt bits to enable
413 static void ibx_display_interrupt_update(struct drm_i915_private
*dev_priv
,
414 uint32_t interrupt_mask
,
415 uint32_t enabled_irq_mask
)
417 uint32_t sdeimr
= I915_READ(SDEIMR
);
418 sdeimr
&= ~interrupt_mask
;
419 sdeimr
|= (~enabled_irq_mask
& interrupt_mask
);
421 assert_spin_locked(&dev_priv
->irq_lock
);
423 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
426 I915_WRITE(SDEIMR
, sdeimr
);
427 POSTING_READ(SDEIMR
);
429 #define ibx_enable_display_interrupt(dev_priv, bits) \
430 ibx_display_interrupt_update((dev_priv), (bits), (bits))
431 #define ibx_disable_display_interrupt(dev_priv, bits) \
432 ibx_display_interrupt_update((dev_priv), (bits), 0)
434 static void ibx_set_fifo_underrun_reporting(struct drm_device
*dev
,
435 enum transcoder pch_transcoder
,
438 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
439 uint32_t bit
= (pch_transcoder
== TRANSCODER_A
) ?
440 SDE_TRANSA_FIFO_UNDER
: SDE_TRANSB_FIFO_UNDER
;
443 ibx_enable_display_interrupt(dev_priv
, bit
);
445 ibx_disable_display_interrupt(dev_priv
, bit
);
448 static void cpt_set_fifo_underrun_reporting(struct drm_device
*dev
,
449 enum transcoder pch_transcoder
,
450 bool enable
, bool old
)
452 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
456 SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder
));
458 if (!cpt_can_enable_serr_int(dev
))
461 ibx_enable_display_interrupt(dev_priv
, SDE_ERROR_CPT
);
463 ibx_disable_display_interrupt(dev_priv
, SDE_ERROR_CPT
);
465 if (old
&& I915_READ(SERR_INT
) &
466 SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder
)) {
467 DRM_ERROR("uncleared pch fifo underrun on pch transcoder %c\n",
468 transcoder_name(pch_transcoder
));
474 * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
477 * @enable: true if we want to report FIFO underrun errors, false otherwise
479 * This function makes us disable or enable CPU fifo underruns for a specific
480 * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
481 * reporting for one pipe may also disable all the other CPU error interruts for
482 * the other pipes, due to the fact that there's just one interrupt mask/enable
483 * bit for all the pipes.
485 * Returns the previous state of underrun reporting.
487 static bool __intel_set_cpu_fifo_underrun_reporting(struct drm_device
*dev
,
488 enum pipe pipe
, bool enable
)
490 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
491 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
492 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
495 assert_spin_locked(&dev_priv
->irq_lock
);
497 old
= !intel_crtc
->cpu_fifo_underrun_disabled
;
498 intel_crtc
->cpu_fifo_underrun_disabled
= !enable
;
500 if (HAS_GMCH_DISPLAY(dev
))
501 i9xx_set_fifo_underrun_reporting(dev
, pipe
, enable
, old
);
502 else if (IS_GEN5(dev
) || IS_GEN6(dev
))
503 ironlake_set_fifo_underrun_reporting(dev
, pipe
, enable
);
504 else if (IS_GEN7(dev
))
505 ivybridge_set_fifo_underrun_reporting(dev
, pipe
, enable
, old
);
506 else if (IS_GEN8(dev
))
507 broadwell_set_fifo_underrun_reporting(dev
, pipe
, enable
);
512 bool intel_set_cpu_fifo_underrun_reporting(struct drm_device
*dev
,
513 enum pipe pipe
, bool enable
)
515 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
519 spin_lock_irqsave(&dev_priv
->irq_lock
, flags
);
520 ret
= __intel_set_cpu_fifo_underrun_reporting(dev
, pipe
, enable
);
521 spin_unlock_irqrestore(&dev_priv
->irq_lock
, flags
);
526 static bool __cpu_fifo_underrun_reporting_enabled(struct drm_device
*dev
,
529 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
530 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
531 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
533 return !intel_crtc
->cpu_fifo_underrun_disabled
;
537 * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
539 * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
540 * @enable: true if we want to report FIFO underrun errors, false otherwise
542 * This function makes us disable or enable PCH fifo underruns for a specific
543 * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
544 * underrun reporting for one transcoder may also disable all the other PCH
545 * error interruts for the other transcoders, due to the fact that there's just
546 * one interrupt mask/enable bit for all the transcoders.
548 * Returns the previous state of underrun reporting.
550 bool intel_set_pch_fifo_underrun_reporting(struct drm_device
*dev
,
551 enum transcoder pch_transcoder
,
554 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
555 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pch_transcoder
];
556 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
561 * NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT
562 * has only one pch transcoder A that all pipes can use. To avoid racy
563 * pch transcoder -> pipe lookups from interrupt code simply store the
564 * underrun statistics in crtc A. Since we never expose this anywhere
565 * nor use it outside of the fifo underrun code here using the "wrong"
566 * crtc on LPT won't cause issues.
569 spin_lock_irqsave(&dev_priv
->irq_lock
, flags
);
571 old
= !intel_crtc
->pch_fifo_underrun_disabled
;
572 intel_crtc
->pch_fifo_underrun_disabled
= !enable
;
574 if (HAS_PCH_IBX(dev
))
575 ibx_set_fifo_underrun_reporting(dev
, pch_transcoder
, enable
);
577 cpt_set_fifo_underrun_reporting(dev
, pch_transcoder
, enable
, old
);
579 spin_unlock_irqrestore(&dev_priv
->irq_lock
, flags
);
585 __i915_enable_pipestat(struct drm_i915_private
*dev_priv
, enum pipe pipe
,
586 u32 enable_mask
, u32 status_mask
)
588 u32 reg
= PIPESTAT(pipe
);
589 u32 pipestat
= I915_READ(reg
) & PIPESTAT_INT_ENABLE_MASK
;
591 assert_spin_locked(&dev_priv
->irq_lock
);
592 WARN_ON(!intel_irqs_enabled(dev_priv
));
594 if (WARN_ONCE(enable_mask
& ~PIPESTAT_INT_ENABLE_MASK
||
595 status_mask
& ~PIPESTAT_INT_STATUS_MASK
,
596 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
597 pipe_name(pipe
), enable_mask
, status_mask
))
600 if ((pipestat
& enable_mask
) == enable_mask
)
603 dev_priv
->pipestat_irq_mask
[pipe
] |= status_mask
;
605 /* Enable the interrupt, clear any pending status */
606 pipestat
|= enable_mask
| status_mask
;
607 I915_WRITE(reg
, pipestat
);
612 __i915_disable_pipestat(struct drm_i915_private
*dev_priv
, enum pipe pipe
,
613 u32 enable_mask
, u32 status_mask
)
615 u32 reg
= PIPESTAT(pipe
);
616 u32 pipestat
= I915_READ(reg
) & PIPESTAT_INT_ENABLE_MASK
;
618 assert_spin_locked(&dev_priv
->irq_lock
);
619 WARN_ON(!intel_irqs_enabled(dev_priv
));
621 if (WARN_ONCE(enable_mask
& ~PIPESTAT_INT_ENABLE_MASK
||
622 status_mask
& ~PIPESTAT_INT_STATUS_MASK
,
623 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
624 pipe_name(pipe
), enable_mask
, status_mask
))
627 if ((pipestat
& enable_mask
) == 0)
630 dev_priv
->pipestat_irq_mask
[pipe
] &= ~status_mask
;
632 pipestat
&= ~enable_mask
;
633 I915_WRITE(reg
, pipestat
);
637 static u32
vlv_get_pipestat_enable_mask(struct drm_device
*dev
, u32 status_mask
)
639 u32 enable_mask
= status_mask
<< 16;
642 * On pipe A we don't support the PSR interrupt yet,
643 * on pipe B and C the same bit MBZ.
645 if (WARN_ON_ONCE(status_mask
& PIPE_A_PSR_STATUS_VLV
))
648 * On pipe B and C we don't support the PSR interrupt yet, on pipe
649 * A the same bit is for perf counters which we don't use either.
651 if (WARN_ON_ONCE(status_mask
& PIPE_B_PSR_STATUS_VLV
))
654 enable_mask
&= ~(PIPE_FIFO_UNDERRUN_STATUS
|
655 SPRITE0_FLIP_DONE_INT_EN_VLV
|
656 SPRITE1_FLIP_DONE_INT_EN_VLV
);
657 if (status_mask
& SPRITE0_FLIP_DONE_INT_STATUS_VLV
)
658 enable_mask
|= SPRITE0_FLIP_DONE_INT_EN_VLV
;
659 if (status_mask
& SPRITE1_FLIP_DONE_INT_STATUS_VLV
)
660 enable_mask
|= SPRITE1_FLIP_DONE_INT_EN_VLV
;
666 i915_enable_pipestat(struct drm_i915_private
*dev_priv
, enum pipe pipe
,
671 if (IS_VALLEYVIEW(dev_priv
->dev
))
672 enable_mask
= vlv_get_pipestat_enable_mask(dev_priv
->dev
,
675 enable_mask
= status_mask
<< 16;
676 __i915_enable_pipestat(dev_priv
, pipe
, enable_mask
, status_mask
);
680 i915_disable_pipestat(struct drm_i915_private
*dev_priv
, enum pipe pipe
,
685 if (IS_VALLEYVIEW(dev_priv
->dev
))
686 enable_mask
= vlv_get_pipestat_enable_mask(dev_priv
->dev
,
689 enable_mask
= status_mask
<< 16;
690 __i915_disable_pipestat(dev_priv
, pipe
, enable_mask
, status_mask
);
694 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
696 static void i915_enable_asle_pipestat(struct drm_device
*dev
)
698 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
699 unsigned long irqflags
;
701 if (!dev_priv
->opregion
.asle
|| !IS_MOBILE(dev
))
704 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
706 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_LEGACY_BLC_EVENT_STATUS
);
707 if (INTEL_INFO(dev
)->gen
>= 4)
708 i915_enable_pipestat(dev_priv
, PIPE_A
,
709 PIPE_LEGACY_BLC_EVENT_STATUS
);
711 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
715 * i915_pipe_enabled - check if a pipe is enabled
717 * @pipe: pipe to check
719 * Reading certain registers when the pipe is disabled can hang the chip.
720 * Use this routine to make sure the PLL is running and the pipe is active
721 * before reading such registers if unsure.
724 i915_pipe_enabled(struct drm_device
*dev
, int pipe
)
726 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
728 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
729 /* Locking is horribly broken here, but whatever. */
730 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
731 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
733 return intel_crtc
->active
;
735 return I915_READ(PIPECONF(pipe
)) & PIPECONF_ENABLE
;
740 * This timing diagram depicts the video signal in and
741 * around the vertical blanking period.
743 * Assumptions about the fictitious mode used in this example:
745 * vsync_start = vblank_start + 1
746 * vsync_end = vblank_start + 2
747 * vtotal = vblank_start + 3
750 * latch double buffered registers
751 * increment frame counter (ctg+)
752 * generate start of vblank interrupt (gen4+)
755 * | generate frame start interrupt (aka. vblank interrupt) (gmch)
756 * | may be shifted forward 1-3 extra lines via PIPECONF
758 * | | start of vsync:
759 * | | generate vsync interrupt
761 * ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx
762 * . \hs/ . \hs/ \hs/ \hs/ . \hs/
763 * ----va---> <-----------------vb--------------------> <--------va-------------
764 * | | <----vs-----> |
765 * -vbs-----> <---vbs+1---> <---vbs+2---> <-----0-----> <-----1-----> <-----2--- (scanline counter gen2)
766 * -vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2---> <-----0--- (scanline counter gen3+)
767 * -vbs-2---> <---vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2- (scanline counter hsw+ hdmi)
769 * last visible pixel first visible pixel
770 * | increment frame counter (gen3/4)
771 * pixel counter = vblank_start * htotal pixel counter = 0 (gen3/4)
773 * x = horizontal active
774 * _ = horizontal blanking
775 * hs = horizontal sync
776 * va = vertical active
777 * vb = vertical blanking
779 * vbs = vblank_start (number)
782 * - most events happen at the start of horizontal sync
783 * - frame start happens at the start of horizontal blank, 1-4 lines
784 * (depending on PIPECONF settings) after the start of vblank
785 * - gen3/4 pixel and frame counter are synchronized with the start
786 * of horizontal active on the first line of vertical active
789 static u32
i8xx_get_vblank_counter(struct drm_device
*dev
, int pipe
)
791 /* Gen2 doesn't have a hardware frame counter */
795 /* Called from drm generic code, passed a 'crtc', which
796 * we use as a pipe index
798 static u32
i915_get_vblank_counter(struct drm_device
*dev
, int pipe
)
800 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
801 unsigned long high_frame
;
802 unsigned long low_frame
;
803 u32 high1
, high2
, low
, pixel
, vbl_start
, hsync_start
, htotal
;
805 if (!i915_pipe_enabled(dev
, pipe
)) {
806 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
807 "pipe %c\n", pipe_name(pipe
));
811 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
812 struct intel_crtc
*intel_crtc
=
813 to_intel_crtc(dev_priv
->pipe_to_crtc_mapping
[pipe
]);
814 const struct drm_display_mode
*mode
=
815 &intel_crtc
->config
.adjusted_mode
;
817 htotal
= mode
->crtc_htotal
;
818 hsync_start
= mode
->crtc_hsync_start
;
819 vbl_start
= mode
->crtc_vblank_start
;
820 if (mode
->flags
& DRM_MODE_FLAG_INTERLACE
)
821 vbl_start
= DIV_ROUND_UP(vbl_start
, 2);
823 enum transcoder cpu_transcoder
= (enum transcoder
) pipe
;
825 htotal
= ((I915_READ(HTOTAL(cpu_transcoder
)) >> 16) & 0x1fff) + 1;
826 hsync_start
= (I915_READ(HSYNC(cpu_transcoder
)) & 0x1fff) + 1;
827 vbl_start
= (I915_READ(VBLANK(cpu_transcoder
)) & 0x1fff) + 1;
828 if ((I915_READ(PIPECONF(cpu_transcoder
)) &
829 PIPECONF_INTERLACE_MASK
) != PIPECONF_PROGRESSIVE
)
830 vbl_start
= DIV_ROUND_UP(vbl_start
, 2);
833 /* Convert to pixel count */
836 /* Start of vblank event occurs at start of hsync */
837 vbl_start
-= htotal
- hsync_start
;
839 high_frame
= PIPEFRAME(pipe
);
840 low_frame
= PIPEFRAMEPIXEL(pipe
);
843 * High & low register fields aren't synchronized, so make sure
844 * we get a low value that's stable across two reads of the high
848 high1
= I915_READ(high_frame
) & PIPE_FRAME_HIGH_MASK
;
849 low
= I915_READ(low_frame
);
850 high2
= I915_READ(high_frame
) & PIPE_FRAME_HIGH_MASK
;
851 } while (high1
!= high2
);
853 high1
>>= PIPE_FRAME_HIGH_SHIFT
;
854 pixel
= low
& PIPE_PIXEL_MASK
;
855 low
>>= PIPE_FRAME_LOW_SHIFT
;
858 * The frame counter increments at beginning of active.
859 * Cook up a vblank counter by also checking the pixel
860 * counter against vblank start.
862 return (((high1
<< 8) | low
) + (pixel
>= vbl_start
)) & 0xffffff;
865 static u32
gm45_get_vblank_counter(struct drm_device
*dev
, int pipe
)
867 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
868 int reg
= PIPE_FRMCOUNT_GM45(pipe
);
870 if (!i915_pipe_enabled(dev
, pipe
)) {
871 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
872 "pipe %c\n", pipe_name(pipe
));
876 return I915_READ(reg
);
879 /* raw reads, only for fast reads of display block, no need for forcewake etc. */
880 #define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
882 static int __intel_get_crtc_scanline(struct intel_crtc
*crtc
)
884 struct drm_device
*dev
= crtc
->base
.dev
;
885 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
886 const struct drm_display_mode
*mode
= &crtc
->config
.adjusted_mode
;
887 enum pipe pipe
= crtc
->pipe
;
888 int position
, vtotal
;
890 vtotal
= mode
->crtc_vtotal
;
891 if (mode
->flags
& DRM_MODE_FLAG_INTERLACE
)
895 position
= __raw_i915_read32(dev_priv
, PIPEDSL(pipe
)) & DSL_LINEMASK_GEN2
;
897 position
= __raw_i915_read32(dev_priv
, PIPEDSL(pipe
)) & DSL_LINEMASK_GEN3
;
900 * See update_scanline_offset() for the details on the
901 * scanline_offset adjustment.
903 return (position
+ crtc
->scanline_offset
) % vtotal
;
906 static int i915_get_crtc_scanoutpos(struct drm_device
*dev
, int pipe
,
907 unsigned int flags
, int *vpos
, int *hpos
,
908 ktime_t
*stime
, ktime_t
*etime
)
910 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
911 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
912 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
913 const struct drm_display_mode
*mode
= &intel_crtc
->config
.adjusted_mode
;
915 int vbl_start
, vbl_end
, hsync_start
, htotal
, vtotal
;
918 unsigned long irqflags
;
920 if (!intel_crtc
->active
) {
921 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
922 "pipe %c\n", pipe_name(pipe
));
926 htotal
= mode
->crtc_htotal
;
927 hsync_start
= mode
->crtc_hsync_start
;
928 vtotal
= mode
->crtc_vtotal
;
929 vbl_start
= mode
->crtc_vblank_start
;
930 vbl_end
= mode
->crtc_vblank_end
;
932 if (mode
->flags
& DRM_MODE_FLAG_INTERLACE
) {
933 vbl_start
= DIV_ROUND_UP(vbl_start
, 2);
938 ret
|= DRM_SCANOUTPOS_VALID
| DRM_SCANOUTPOS_ACCURATE
;
941 * Lock uncore.lock, as we will do multiple timing critical raw
942 * register reads, potentially with preemption disabled, so the
943 * following code must not block on uncore.lock.
945 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
947 /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
949 /* Get optional system timestamp before query. */
951 *stime
= ktime_get();
953 if (IS_GEN2(dev
) || IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
954 /* No obvious pixelcount register. Only query vertical
955 * scanout position from Display scan line register.
957 position
= __intel_get_crtc_scanline(intel_crtc
);
959 /* Have access to pixelcount since start of frame.
960 * We can split this into vertical and horizontal
963 position
= (__raw_i915_read32(dev_priv
, PIPEFRAMEPIXEL(pipe
)) & PIPE_PIXEL_MASK
) >> PIPE_PIXEL_SHIFT
;
965 /* convert to pixel counts */
971 * In interlaced modes, the pixel counter counts all pixels,
972 * so one field will have htotal more pixels. In order to avoid
973 * the reported position from jumping backwards when the pixel
974 * counter is beyond the length of the shorter field, just
975 * clamp the position the length of the shorter field. This
976 * matches how the scanline counter based position works since
977 * the scanline counter doesn't count the two half lines.
979 if (position
>= vtotal
)
980 position
= vtotal
- 1;
983 * Start of vblank interrupt is triggered at start of hsync,
984 * just prior to the first active line of vblank. However we
985 * consider lines to start at the leading edge of horizontal
986 * active. So, should we get here before we've crossed into
987 * the horizontal active of the first line in vblank, we would
988 * not set the DRM_SCANOUTPOS_INVBL flag. In order to fix that,
989 * always add htotal-hsync_start to the current pixel position.
991 position
= (position
+ htotal
- hsync_start
) % vtotal
;
994 /* Get optional system timestamp after query. */
996 *etime
= ktime_get();
998 /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
1000 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
1002 in_vbl
= position
>= vbl_start
&& position
< vbl_end
;
1005 * While in vblank, position will be negative
1006 * counting up towards 0 at vbl_end. And outside
1007 * vblank, position will be positive counting
1010 if (position
>= vbl_start
)
1011 position
-= vbl_end
;
1013 position
+= vtotal
- vbl_end
;
1015 if (IS_GEN2(dev
) || IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
1019 *vpos
= position
/ htotal
;
1020 *hpos
= position
- (*vpos
* htotal
);
1025 ret
|= DRM_SCANOUTPOS_IN_VBLANK
;
1030 int intel_get_crtc_scanline(struct intel_crtc
*crtc
)
1032 struct drm_i915_private
*dev_priv
= crtc
->base
.dev
->dev_private
;
1033 unsigned long irqflags
;
1036 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
1037 position
= __intel_get_crtc_scanline(crtc
);
1038 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
1043 static int i915_get_vblank_timestamp(struct drm_device
*dev
, int pipe
,
1045 struct timeval
*vblank_time
,
1048 struct drm_crtc
*crtc
;
1050 if (pipe
< 0 || pipe
>= INTEL_INFO(dev
)->num_pipes
) {
1051 DRM_ERROR("Invalid crtc %d\n", pipe
);
1055 /* Get drm_crtc to timestamp: */
1056 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
1058 DRM_ERROR("Invalid crtc %d\n", pipe
);
1062 if (!crtc
->enabled
) {
1063 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe
);
1067 /* Helper routine in DRM core does all the work: */
1068 return drm_calc_vbltimestamp_from_scanoutpos(dev
, pipe
, max_error
,
1071 &to_intel_crtc(crtc
)->config
.adjusted_mode
);
1074 static bool intel_hpd_irq_event(struct drm_device
*dev
,
1075 struct drm_connector
*connector
)
1077 enum drm_connector_status old_status
;
1079 WARN_ON(!mutex_is_locked(&dev
->mode_config
.mutex
));
1080 old_status
= connector
->status
;
1082 connector
->status
= connector
->funcs
->detect(connector
, false);
1083 if (old_status
== connector
->status
)
1086 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
1089 drm_get_connector_status_name(old_status
),
1090 drm_get_connector_status_name(connector
->status
));
1095 static void i915_digport_work_func(struct work_struct
*work
)
1097 struct drm_i915_private
*dev_priv
=
1098 container_of(work
, struct drm_i915_private
, dig_port_work
);
1099 u32 long_port_mask
, short_port_mask
;
1100 struct intel_digital_port
*intel_dig_port
;
1104 spin_lock_irq(&dev_priv
->irq_lock
);
1105 long_port_mask
= dev_priv
->long_hpd_port_mask
;
1106 dev_priv
->long_hpd_port_mask
= 0;
1107 short_port_mask
= dev_priv
->short_hpd_port_mask
;
1108 dev_priv
->short_hpd_port_mask
= 0;
1109 spin_unlock_irq(&dev_priv
->irq_lock
);
1111 for (i
= 0; i
< I915_MAX_PORTS
; i
++) {
1113 bool long_hpd
= false;
1114 intel_dig_port
= dev_priv
->hpd_irq_port
[i
];
1115 if (!intel_dig_port
|| !intel_dig_port
->hpd_pulse
)
1118 if (long_port_mask
& (1 << i
)) {
1121 } else if (short_port_mask
& (1 << i
))
1125 ret
= intel_dig_port
->hpd_pulse(intel_dig_port
, long_hpd
);
1127 /* if we get true fallback to old school hpd */
1128 old_bits
|= (1 << intel_dig_port
->base
.hpd_pin
);
1134 spin_lock_irq(&dev_priv
->irq_lock
);
1135 dev_priv
->hpd_event_bits
|= old_bits
;
1136 spin_unlock_irq(&dev_priv
->irq_lock
);
1137 schedule_work(&dev_priv
->hotplug_work
);
1142 * Handle hotplug events outside the interrupt handler proper.
1144 #define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
1146 static void i915_hotplug_work_func(struct work_struct
*work
)
1148 struct drm_i915_private
*dev_priv
=
1149 container_of(work
, struct drm_i915_private
, hotplug_work
);
1150 struct drm_device
*dev
= dev_priv
->dev
;
1151 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
1152 struct intel_connector
*intel_connector
;
1153 struct intel_encoder
*intel_encoder
;
1154 struct drm_connector
*connector
;
1155 bool hpd_disabled
= false;
1156 bool changed
= false;
1159 mutex_lock(&mode_config
->mutex
);
1160 DRM_DEBUG_KMS("running encoder hotplug functions\n");
1162 spin_lock_irq(&dev_priv
->irq_lock
);
1164 hpd_event_bits
= dev_priv
->hpd_event_bits
;
1165 dev_priv
->hpd_event_bits
= 0;
1166 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
1167 intel_connector
= to_intel_connector(connector
);
1168 if (!intel_connector
->encoder
)
1170 intel_encoder
= intel_connector
->encoder
;
1171 if (intel_encoder
->hpd_pin
> HPD_NONE
&&
1172 dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_MARK_DISABLED
&&
1173 connector
->polled
== DRM_CONNECTOR_POLL_HPD
) {
1174 DRM_INFO("HPD interrupt storm detected on connector %s: "
1175 "switching from hotplug detection to polling\n",
1177 dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
= HPD_DISABLED
;
1178 connector
->polled
= DRM_CONNECTOR_POLL_CONNECT
1179 | DRM_CONNECTOR_POLL_DISCONNECT
;
1180 hpd_disabled
= true;
1182 if (hpd_event_bits
& (1 << intel_encoder
->hpd_pin
)) {
1183 DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
1184 connector
->name
, intel_encoder
->hpd_pin
);
1187 /* if there were no outputs to poll, poll was disabled,
1188 * therefore make sure it's enabled when disabling HPD on
1189 * some connectors */
1191 drm_kms_helper_poll_enable(dev
);
1192 mod_delayed_work(system_wq
, &dev_priv
->hotplug_reenable_work
,
1193 msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY
));
1196 spin_unlock_irq(&dev_priv
->irq_lock
);
1198 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
1199 intel_connector
= to_intel_connector(connector
);
1200 if (!intel_connector
->encoder
)
1202 intel_encoder
= intel_connector
->encoder
;
1203 if (hpd_event_bits
& (1 << intel_encoder
->hpd_pin
)) {
1204 if (intel_encoder
->hot_plug
)
1205 intel_encoder
->hot_plug(intel_encoder
);
1206 if (intel_hpd_irq_event(dev
, connector
))
1210 mutex_unlock(&mode_config
->mutex
);
1213 drm_kms_helper_hotplug_event(dev
);
1216 static void ironlake_rps_change_irq_handler(struct drm_device
*dev
)
1218 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1219 u32 busy_up
, busy_down
, max_avg
, min_avg
;
1222 spin_lock(&mchdev_lock
);
1224 I915_WRITE16(MEMINTRSTS
, I915_READ(MEMINTRSTS
));
1226 new_delay
= dev_priv
->ips
.cur_delay
;
1228 I915_WRITE16(MEMINTRSTS
, MEMINT_EVAL_CHG
);
1229 busy_up
= I915_READ(RCPREVBSYTUPAVG
);
1230 busy_down
= I915_READ(RCPREVBSYTDNAVG
);
1231 max_avg
= I915_READ(RCBMAXAVG
);
1232 min_avg
= I915_READ(RCBMINAVG
);
1234 /* Handle RCS change request from hw */
1235 if (busy_up
> max_avg
) {
1236 if (dev_priv
->ips
.cur_delay
!= dev_priv
->ips
.max_delay
)
1237 new_delay
= dev_priv
->ips
.cur_delay
- 1;
1238 if (new_delay
< dev_priv
->ips
.max_delay
)
1239 new_delay
= dev_priv
->ips
.max_delay
;
1240 } else if (busy_down
< min_avg
) {
1241 if (dev_priv
->ips
.cur_delay
!= dev_priv
->ips
.min_delay
)
1242 new_delay
= dev_priv
->ips
.cur_delay
+ 1;
1243 if (new_delay
> dev_priv
->ips
.min_delay
)
1244 new_delay
= dev_priv
->ips
.min_delay
;
1247 if (ironlake_set_drps(dev
, new_delay
))
1248 dev_priv
->ips
.cur_delay
= new_delay
;
1250 spin_unlock(&mchdev_lock
);
1255 static void notify_ring(struct drm_device
*dev
,
1256 struct intel_engine_cs
*ring
)
1258 if (!intel_ring_initialized(ring
))
1261 trace_i915_gem_request_complete(ring
);
1263 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
1264 intel_notify_mmio_flip(ring
);
1266 wake_up_all(&ring
->irq_queue
);
1267 i915_queue_hangcheck(dev
);
1270 static u32
vlv_c0_residency(struct drm_i915_private
*dev_priv
,
1271 struct intel_rps_ei
*rps_ei
)
1273 u32 cz_ts
, cz_freq_khz
;
1274 u32 render_count
, media_count
;
1275 u32 elapsed_render
, elapsed_media
, elapsed_time
;
1278 cz_ts
= vlv_punit_read(dev_priv
, PUNIT_REG_CZ_TIMESTAMP
);
1279 cz_freq_khz
= DIV_ROUND_CLOSEST(dev_priv
->mem_freq
* 1000, 4);
1281 render_count
= I915_READ(VLV_RENDER_C0_COUNT_REG
);
1282 media_count
= I915_READ(VLV_MEDIA_C0_COUNT_REG
);
1284 if (rps_ei
->cz_clock
== 0) {
1285 rps_ei
->cz_clock
= cz_ts
;
1286 rps_ei
->render_c0
= render_count
;
1287 rps_ei
->media_c0
= media_count
;
1289 return dev_priv
->rps
.cur_freq
;
1292 elapsed_time
= cz_ts
- rps_ei
->cz_clock
;
1293 rps_ei
->cz_clock
= cz_ts
;
1295 elapsed_render
= render_count
- rps_ei
->render_c0
;
1296 rps_ei
->render_c0
= render_count
;
1298 elapsed_media
= media_count
- rps_ei
->media_c0
;
1299 rps_ei
->media_c0
= media_count
;
1301 /* Convert all the counters into common unit of milli sec */
1302 elapsed_time
/= VLV_CZ_CLOCK_TO_MILLI_SEC
;
1303 elapsed_render
/= cz_freq_khz
;
1304 elapsed_media
/= cz_freq_khz
;
1307 * Calculate overall C0 residency percentage
1308 * only if elapsed time is non zero
1312 ((max(elapsed_render
, elapsed_media
) * 100)
1320 * vlv_calc_delay_from_C0_counters - Increase/Decrease freq based on GPU
1321 * busy-ness calculated from C0 counters of render & media power wells
1322 * @dev_priv: DRM device private
1325 static int vlv_calc_delay_from_C0_counters(struct drm_i915_private
*dev_priv
)
1327 u32 residency_C0_up
= 0, residency_C0_down
= 0;
1330 dev_priv
->rps
.ei_interrupt_count
++;
1332 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
1335 if (dev_priv
->rps
.up_ei
.cz_clock
== 0) {
1336 vlv_c0_residency(dev_priv
, &dev_priv
->rps
.up_ei
);
1337 vlv_c0_residency(dev_priv
, &dev_priv
->rps
.down_ei
);
1338 return dev_priv
->rps
.cur_freq
;
1343 * To down throttle, C0 residency should be less than down threshold
1344 * for continous EI intervals. So calculate down EI counters
1345 * once in VLV_INT_COUNT_FOR_DOWN_EI
1347 if (dev_priv
->rps
.ei_interrupt_count
== VLV_INT_COUNT_FOR_DOWN_EI
) {
1349 dev_priv
->rps
.ei_interrupt_count
= 0;
1351 residency_C0_down
= vlv_c0_residency(dev_priv
,
1352 &dev_priv
->rps
.down_ei
);
1354 residency_C0_up
= vlv_c0_residency(dev_priv
,
1355 &dev_priv
->rps
.up_ei
);
1358 new_delay
= dev_priv
->rps
.cur_freq
;
1360 adj
= dev_priv
->rps
.last_adj
;
1361 /* C0 residency is greater than UP threshold. Increase Frequency */
1362 if (residency_C0_up
>= VLV_RP_UP_EI_THRESHOLD
) {
1368 if (dev_priv
->rps
.cur_freq
< dev_priv
->rps
.max_freq_softlimit
)
1369 new_delay
= dev_priv
->rps
.cur_freq
+ adj
;
1372 * For better performance, jump directly
1373 * to RPe if we're below it.
1375 if (new_delay
< dev_priv
->rps
.efficient_freq
)
1376 new_delay
= dev_priv
->rps
.efficient_freq
;
1378 } else if (!dev_priv
->rps
.ei_interrupt_count
&&
1379 (residency_C0_down
< VLV_RP_DOWN_EI_THRESHOLD
)) {
1385 * This means, C0 residency is less than down threshold over
1386 * a period of VLV_INT_COUNT_FOR_DOWN_EI. So, reduce the freq
1388 if (dev_priv
->rps
.cur_freq
> dev_priv
->rps
.min_freq_softlimit
)
1389 new_delay
= dev_priv
->rps
.cur_freq
+ adj
;
1395 static void gen6_pm_rps_work(struct work_struct
*work
)
1397 struct drm_i915_private
*dev_priv
=
1398 container_of(work
, struct drm_i915_private
, rps
.work
);
1402 spin_lock_irq(&dev_priv
->irq_lock
);
1403 pm_iir
= dev_priv
->rps
.pm_iir
;
1404 dev_priv
->rps
.pm_iir
= 0;
1405 if (INTEL_INFO(dev_priv
->dev
)->gen
>= 8)
1406 gen8_enable_pm_irq(dev_priv
, dev_priv
->pm_rps_events
);
1408 /* Make sure not to corrupt PMIMR state used by ringbuffer */
1409 gen6_enable_pm_irq(dev_priv
, dev_priv
->pm_rps_events
);
1411 spin_unlock_irq(&dev_priv
->irq_lock
);
1413 /* Make sure we didn't queue anything we're not going to process. */
1414 WARN_ON(pm_iir
& ~dev_priv
->pm_rps_events
);
1416 if ((pm_iir
& dev_priv
->pm_rps_events
) == 0)
1419 mutex_lock(&dev_priv
->rps
.hw_lock
);
1421 adj
= dev_priv
->rps
.last_adj
;
1422 if (pm_iir
& GEN6_PM_RP_UP_THRESHOLD
) {
1426 /* CHV needs even encode values */
1427 adj
= IS_CHERRYVIEW(dev_priv
->dev
) ? 2 : 1;
1429 new_delay
= dev_priv
->rps
.cur_freq
+ adj
;
1432 * For better performance, jump directly
1433 * to RPe if we're below it.
1435 if (new_delay
< dev_priv
->rps
.efficient_freq
)
1436 new_delay
= dev_priv
->rps
.efficient_freq
;
1437 } else if (pm_iir
& GEN6_PM_RP_DOWN_TIMEOUT
) {
1438 if (dev_priv
->rps
.cur_freq
> dev_priv
->rps
.efficient_freq
)
1439 new_delay
= dev_priv
->rps
.efficient_freq
;
1441 new_delay
= dev_priv
->rps
.min_freq_softlimit
;
1443 } else if (pm_iir
& GEN6_PM_RP_UP_EI_EXPIRED
) {
1444 new_delay
= vlv_calc_delay_from_C0_counters(dev_priv
);
1445 } else if (pm_iir
& GEN6_PM_RP_DOWN_THRESHOLD
) {
1449 /* CHV needs even encode values */
1450 adj
= IS_CHERRYVIEW(dev_priv
->dev
) ? -2 : -1;
1452 new_delay
= dev_priv
->rps
.cur_freq
+ adj
;
1453 } else { /* unknown event */
1454 new_delay
= dev_priv
->rps
.cur_freq
;
1457 /* sysfs frequency interfaces may have snuck in while servicing the
1460 new_delay
= clamp_t(int, new_delay
,
1461 dev_priv
->rps
.min_freq_softlimit
,
1462 dev_priv
->rps
.max_freq_softlimit
);
1464 dev_priv
->rps
.last_adj
= new_delay
- dev_priv
->rps
.cur_freq
;
1466 if (IS_VALLEYVIEW(dev_priv
->dev
))
1467 valleyview_set_rps(dev_priv
->dev
, new_delay
);
1469 gen6_set_rps(dev_priv
->dev
, new_delay
);
1471 mutex_unlock(&dev_priv
->rps
.hw_lock
);
1476 * ivybridge_parity_work - Workqueue called when a parity error interrupt
1478 * @work: workqueue struct
1480 * Doesn't actually do anything except notify userspace. As a consequence of
1481 * this event, userspace should try to remap the bad rows since statistically
1482 * it is likely the same row is more likely to go bad again.
1484 static void ivybridge_parity_work(struct work_struct
*work
)
1486 struct drm_i915_private
*dev_priv
=
1487 container_of(work
, struct drm_i915_private
, l3_parity
.error_work
);
1488 u32 error_status
, row
, bank
, subbank
;
1489 char *parity_event
[6];
1493 /* We must turn off DOP level clock gating to access the L3 registers.
1494 * In order to prevent a get/put style interface, acquire struct mutex
1495 * any time we access those registers.
1497 mutex_lock(&dev_priv
->dev
->struct_mutex
);
1499 /* If we've screwed up tracking, just let the interrupt fire again */
1500 if (WARN_ON(!dev_priv
->l3_parity
.which_slice
))
1503 misccpctl
= I915_READ(GEN7_MISCCPCTL
);
1504 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
& ~GEN7_DOP_CLOCK_GATE_ENABLE
);
1505 POSTING_READ(GEN7_MISCCPCTL
);
1507 while ((slice
= ffs(dev_priv
->l3_parity
.which_slice
)) != 0) {
1511 if (WARN_ON_ONCE(slice
>= NUM_L3_SLICES(dev_priv
->dev
)))
1514 dev_priv
->l3_parity
.which_slice
&= ~(1<<slice
);
1516 reg
= GEN7_L3CDERRST1
+ (slice
* 0x200);
1518 error_status
= I915_READ(reg
);
1519 row
= GEN7_PARITY_ERROR_ROW(error_status
);
1520 bank
= GEN7_PARITY_ERROR_BANK(error_status
);
1521 subbank
= GEN7_PARITY_ERROR_SUBBANK(error_status
);
1523 I915_WRITE(reg
, GEN7_PARITY_ERROR_VALID
| GEN7_L3CDERRST1_ENABLE
);
1526 parity_event
[0] = I915_L3_PARITY_UEVENT
"=1";
1527 parity_event
[1] = kasprintf(GFP_KERNEL
, "ROW=%d", row
);
1528 parity_event
[2] = kasprintf(GFP_KERNEL
, "BANK=%d", bank
);
1529 parity_event
[3] = kasprintf(GFP_KERNEL
, "SUBBANK=%d", subbank
);
1530 parity_event
[4] = kasprintf(GFP_KERNEL
, "SLICE=%d", slice
);
1531 parity_event
[5] = NULL
;
1533 kobject_uevent_env(&dev_priv
->dev
->primary
->kdev
->kobj
,
1534 KOBJ_CHANGE
, parity_event
);
1536 DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n",
1537 slice
, row
, bank
, subbank
);
1539 kfree(parity_event
[4]);
1540 kfree(parity_event
[3]);
1541 kfree(parity_event
[2]);
1542 kfree(parity_event
[1]);
1545 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
);
1548 WARN_ON(dev_priv
->l3_parity
.which_slice
);
1549 spin_lock_irq(&dev_priv
->irq_lock
);
1550 gen5_enable_gt_irq(dev_priv
, GT_PARITY_ERROR(dev_priv
->dev
));
1551 spin_unlock_irq(&dev_priv
->irq_lock
);
1553 mutex_unlock(&dev_priv
->dev
->struct_mutex
);
1556 static void ivybridge_parity_error_irq_handler(struct drm_device
*dev
, u32 iir
)
1558 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1560 if (!HAS_L3_DPF(dev
))
1563 spin_lock(&dev_priv
->irq_lock
);
1564 gen5_disable_gt_irq(dev_priv
, GT_PARITY_ERROR(dev
));
1565 spin_unlock(&dev_priv
->irq_lock
);
1567 iir
&= GT_PARITY_ERROR(dev
);
1568 if (iir
& GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1
)
1569 dev_priv
->l3_parity
.which_slice
|= 1 << 1;
1571 if (iir
& GT_RENDER_L3_PARITY_ERROR_INTERRUPT
)
1572 dev_priv
->l3_parity
.which_slice
|= 1 << 0;
1574 queue_work(dev_priv
->wq
, &dev_priv
->l3_parity
.error_work
);
1577 static void ilk_gt_irq_handler(struct drm_device
*dev
,
1578 struct drm_i915_private
*dev_priv
,
1582 (GT_RENDER_USER_INTERRUPT
| GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
))
1583 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
1584 if (gt_iir
& ILK_BSD_USER_INTERRUPT
)
1585 notify_ring(dev
, &dev_priv
->ring
[VCS
]);
1588 static void snb_gt_irq_handler(struct drm_device
*dev
,
1589 struct drm_i915_private
*dev_priv
,
1594 (GT_RENDER_USER_INTERRUPT
| GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
))
1595 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
1596 if (gt_iir
& GT_BSD_USER_INTERRUPT
)
1597 notify_ring(dev
, &dev_priv
->ring
[VCS
]);
1598 if (gt_iir
& GT_BLT_USER_INTERRUPT
)
1599 notify_ring(dev
, &dev_priv
->ring
[BCS
]);
1601 if (gt_iir
& (GT_BLT_CS_ERROR_INTERRUPT
|
1602 GT_BSD_CS_ERROR_INTERRUPT
|
1603 GT_RENDER_CS_MASTER_ERROR_INTERRUPT
)) {
1604 i915_handle_error(dev
, false, "GT error interrupt 0x%08x",
1608 if (gt_iir
& GT_PARITY_ERROR(dev
))
1609 ivybridge_parity_error_irq_handler(dev
, gt_iir
);
1612 static void gen8_rps_irq_handler(struct drm_i915_private
*dev_priv
, u32 pm_iir
)
1614 if ((pm_iir
& dev_priv
->pm_rps_events
) == 0)
1617 spin_lock(&dev_priv
->irq_lock
);
1618 dev_priv
->rps
.pm_iir
|= pm_iir
& dev_priv
->pm_rps_events
;
1619 gen8_disable_pm_irq(dev_priv
, pm_iir
& dev_priv
->pm_rps_events
);
1620 spin_unlock(&dev_priv
->irq_lock
);
1622 queue_work(dev_priv
->wq
, &dev_priv
->rps
.work
);
1625 static irqreturn_t
gen8_gt_irq_handler(struct drm_device
*dev
,
1626 struct drm_i915_private
*dev_priv
,
1629 struct intel_engine_cs
*ring
;
1632 irqreturn_t ret
= IRQ_NONE
;
1634 if (master_ctl
& (GEN8_GT_RCS_IRQ
| GEN8_GT_BCS_IRQ
)) {
1635 tmp
= I915_READ(GEN8_GT_IIR(0));
1637 I915_WRITE(GEN8_GT_IIR(0), tmp
);
1640 rcs
= tmp
>> GEN8_RCS_IRQ_SHIFT
;
1641 ring
= &dev_priv
->ring
[RCS
];
1642 if (rcs
& GT_RENDER_USER_INTERRUPT
)
1643 notify_ring(dev
, ring
);
1644 if (rcs
& GT_CONTEXT_SWITCH_INTERRUPT
)
1645 intel_execlists_handle_ctx_events(ring
);
1647 bcs
= tmp
>> GEN8_BCS_IRQ_SHIFT
;
1648 ring
= &dev_priv
->ring
[BCS
];
1649 if (bcs
& GT_RENDER_USER_INTERRUPT
)
1650 notify_ring(dev
, ring
);
1651 if (bcs
& GT_CONTEXT_SWITCH_INTERRUPT
)
1652 intel_execlists_handle_ctx_events(ring
);
1654 DRM_ERROR("The master control interrupt lied (GT0)!\n");
1657 if (master_ctl
& (GEN8_GT_VCS1_IRQ
| GEN8_GT_VCS2_IRQ
)) {
1658 tmp
= I915_READ(GEN8_GT_IIR(1));
1660 I915_WRITE(GEN8_GT_IIR(1), tmp
);
1663 vcs
= tmp
>> GEN8_VCS1_IRQ_SHIFT
;
1664 ring
= &dev_priv
->ring
[VCS
];
1665 if (vcs
& GT_RENDER_USER_INTERRUPT
)
1666 notify_ring(dev
, ring
);
1667 if (vcs
& GT_CONTEXT_SWITCH_INTERRUPT
)
1668 intel_execlists_handle_ctx_events(ring
);
1670 vcs
= tmp
>> GEN8_VCS2_IRQ_SHIFT
;
1671 ring
= &dev_priv
->ring
[VCS2
];
1672 if (vcs
& GT_RENDER_USER_INTERRUPT
)
1673 notify_ring(dev
, ring
);
1674 if (vcs
& GT_CONTEXT_SWITCH_INTERRUPT
)
1675 intel_execlists_handle_ctx_events(ring
);
1677 DRM_ERROR("The master control interrupt lied (GT1)!\n");
1680 if (master_ctl
& GEN8_GT_PM_IRQ
) {
1681 tmp
= I915_READ(GEN8_GT_IIR(2));
1682 if (tmp
& dev_priv
->pm_rps_events
) {
1683 I915_WRITE(GEN8_GT_IIR(2),
1684 tmp
& dev_priv
->pm_rps_events
);
1686 gen8_rps_irq_handler(dev_priv
, tmp
);
1688 DRM_ERROR("The master control interrupt lied (PM)!\n");
1691 if (master_ctl
& GEN8_GT_VECS_IRQ
) {
1692 tmp
= I915_READ(GEN8_GT_IIR(3));
1694 I915_WRITE(GEN8_GT_IIR(3), tmp
);
1697 vcs
= tmp
>> GEN8_VECS_IRQ_SHIFT
;
1698 ring
= &dev_priv
->ring
[VECS
];
1699 if (vcs
& GT_RENDER_USER_INTERRUPT
)
1700 notify_ring(dev
, ring
);
1701 if (vcs
& GT_CONTEXT_SWITCH_INTERRUPT
)
1702 intel_execlists_handle_ctx_events(ring
);
1704 DRM_ERROR("The master control interrupt lied (GT3)!\n");
1710 #define HPD_STORM_DETECT_PERIOD 1000
1711 #define HPD_STORM_THRESHOLD 5
1713 static int ilk_port_to_hotplug_shift(enum port port
)
1729 static int g4x_port_to_hotplug_shift(enum port port
)
1745 static inline enum port
get_port_from_pin(enum hpd_pin pin
)
1755 return PORT_A
; /* no hpd */
1759 static inline void intel_hpd_irq_handler(struct drm_device
*dev
,
1760 u32 hotplug_trigger
,
1761 u32 dig_hotplug_reg
,
1764 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1767 bool storm_detected
= false;
1768 bool queue_dig
= false, queue_hp
= false;
1770 u32 dig_port_mask
= 0;
1772 if (!hotplug_trigger
)
1775 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x, dig 0x%08x\n",
1776 hotplug_trigger
, dig_hotplug_reg
);
1778 spin_lock(&dev_priv
->irq_lock
);
1779 for (i
= 1; i
< HPD_NUM_PINS
; i
++) {
1780 if (!(hpd
[i
] & hotplug_trigger
))
1783 port
= get_port_from_pin(i
);
1784 if (port
&& dev_priv
->hpd_irq_port
[port
]) {
1788 dig_shift
= g4x_port_to_hotplug_shift(port
);
1789 long_hpd
= (hotplug_trigger
>> dig_shift
) & PORTB_HOTPLUG_LONG_DETECT
;
1791 dig_shift
= ilk_port_to_hotplug_shift(port
);
1792 long_hpd
= (dig_hotplug_reg
>> dig_shift
) & PORTB_HOTPLUG_LONG_DETECT
;
1795 DRM_DEBUG_DRIVER("digital hpd port %c - %s\n",
1797 long_hpd
? "long" : "short");
1798 /* for long HPD pulses we want to have the digital queue happen,
1799 but we still want HPD storm detection to function. */
1801 dev_priv
->long_hpd_port_mask
|= (1 << port
);
1802 dig_port_mask
|= hpd
[i
];
1804 /* for short HPD just trigger the digital queue */
1805 dev_priv
->short_hpd_port_mask
|= (1 << port
);
1806 hotplug_trigger
&= ~hpd
[i
];
1812 for (i
= 1; i
< HPD_NUM_PINS
; i
++) {
1813 if (hpd
[i
] & hotplug_trigger
&&
1814 dev_priv
->hpd_stats
[i
].hpd_mark
== HPD_DISABLED
) {
1816 * On GMCH platforms the interrupt mask bits only
1817 * prevent irq generation, not the setting of the
1818 * hotplug bits itself. So only WARN about unexpected
1819 * interrupts on saner platforms.
1821 WARN_ONCE(INTEL_INFO(dev
)->gen
>= 5 && !IS_VALLEYVIEW(dev
),
1822 "Received HPD interrupt (0x%08x) on pin %d (0x%08x) although disabled\n",
1823 hotplug_trigger
, i
, hpd
[i
]);
1828 if (!(hpd
[i
] & hotplug_trigger
) ||
1829 dev_priv
->hpd_stats
[i
].hpd_mark
!= HPD_ENABLED
)
1832 if (!(dig_port_mask
& hpd
[i
])) {
1833 dev_priv
->hpd_event_bits
|= (1 << i
);
1837 if (!time_in_range(jiffies
, dev_priv
->hpd_stats
[i
].hpd_last_jiffies
,
1838 dev_priv
->hpd_stats
[i
].hpd_last_jiffies
1839 + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD
))) {
1840 dev_priv
->hpd_stats
[i
].hpd_last_jiffies
= jiffies
;
1841 dev_priv
->hpd_stats
[i
].hpd_cnt
= 0;
1842 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: 0\n", i
);
1843 } else if (dev_priv
->hpd_stats
[i
].hpd_cnt
> HPD_STORM_THRESHOLD
) {
1844 dev_priv
->hpd_stats
[i
].hpd_mark
= HPD_MARK_DISABLED
;
1845 dev_priv
->hpd_event_bits
&= ~(1 << i
);
1846 DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i
);
1847 storm_detected
= true;
1849 dev_priv
->hpd_stats
[i
].hpd_cnt
++;
1850 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n", i
,
1851 dev_priv
->hpd_stats
[i
].hpd_cnt
);
1856 dev_priv
->display
.hpd_irq_setup(dev
);
1857 spin_unlock(&dev_priv
->irq_lock
);
1860 * Our hotplug handler can grab modeset locks (by calling down into the
1861 * fb helpers). Hence it must not be run on our own dev-priv->wq work
1862 * queue for otherwise the flush_work in the pageflip code will
1866 queue_work(dev_priv
->dp_wq
, &dev_priv
->dig_port_work
);
1868 schedule_work(&dev_priv
->hotplug_work
);
1871 static void gmbus_irq_handler(struct drm_device
*dev
)
1873 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1875 wake_up_all(&dev_priv
->gmbus_wait_queue
);
1878 static void dp_aux_irq_handler(struct drm_device
*dev
)
1880 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1882 wake_up_all(&dev_priv
->gmbus_wait_queue
);
1885 #if defined(CONFIG_DEBUG_FS)
1886 static void display_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
,
1887 uint32_t crc0
, uint32_t crc1
,
1888 uint32_t crc2
, uint32_t crc3
,
1891 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1892 struct intel_pipe_crc
*pipe_crc
= &dev_priv
->pipe_crc
[pipe
];
1893 struct intel_pipe_crc_entry
*entry
;
1896 spin_lock(&pipe_crc
->lock
);
1898 if (!pipe_crc
->entries
) {
1899 spin_unlock(&pipe_crc
->lock
);
1900 DRM_ERROR("spurious interrupt\n");
1904 head
= pipe_crc
->head
;
1905 tail
= pipe_crc
->tail
;
1907 if (CIRC_SPACE(head
, tail
, INTEL_PIPE_CRC_ENTRIES_NR
) < 1) {
1908 spin_unlock(&pipe_crc
->lock
);
1909 DRM_ERROR("CRC buffer overflowing\n");
1913 entry
= &pipe_crc
->entries
[head
];
1915 entry
->frame
= dev
->driver
->get_vblank_counter(dev
, pipe
);
1916 entry
->crc
[0] = crc0
;
1917 entry
->crc
[1] = crc1
;
1918 entry
->crc
[2] = crc2
;
1919 entry
->crc
[3] = crc3
;
1920 entry
->crc
[4] = crc4
;
1922 head
= (head
+ 1) & (INTEL_PIPE_CRC_ENTRIES_NR
- 1);
1923 pipe_crc
->head
= head
;
1925 spin_unlock(&pipe_crc
->lock
);
1927 wake_up_interruptible(&pipe_crc
->wq
);
1931 display_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
,
1932 uint32_t crc0
, uint32_t crc1
,
1933 uint32_t crc2
, uint32_t crc3
,
1938 static void hsw_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
)
1940 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1942 display_pipe_crc_irq_handler(dev
, pipe
,
1943 I915_READ(PIPE_CRC_RES_1_IVB(pipe
)),
1947 static void ivb_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
)
1949 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1951 display_pipe_crc_irq_handler(dev
, pipe
,
1952 I915_READ(PIPE_CRC_RES_1_IVB(pipe
)),
1953 I915_READ(PIPE_CRC_RES_2_IVB(pipe
)),
1954 I915_READ(PIPE_CRC_RES_3_IVB(pipe
)),
1955 I915_READ(PIPE_CRC_RES_4_IVB(pipe
)),
1956 I915_READ(PIPE_CRC_RES_5_IVB(pipe
)));
1959 static void i9xx_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
)
1961 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1962 uint32_t res1
, res2
;
1964 if (INTEL_INFO(dev
)->gen
>= 3)
1965 res1
= I915_READ(PIPE_CRC_RES_RES1_I915(pipe
));
1969 if (INTEL_INFO(dev
)->gen
>= 5 || IS_G4X(dev
))
1970 res2
= I915_READ(PIPE_CRC_RES_RES2_G4X(pipe
));
1974 display_pipe_crc_irq_handler(dev
, pipe
,
1975 I915_READ(PIPE_CRC_RES_RED(pipe
)),
1976 I915_READ(PIPE_CRC_RES_GREEN(pipe
)),
1977 I915_READ(PIPE_CRC_RES_BLUE(pipe
)),
1981 void gen8_flip_interrupt(struct drm_device
*dev
)
1983 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1985 if (!dev_priv
->rps
.is_bdw_sw_turbo
)
1988 if(atomic_read(&dev_priv
->rps
.sw_turbo
.flip_received
)) {
1989 mod_timer(&dev_priv
->rps
.sw_turbo
.flip_timer
,
1990 usecs_to_jiffies(dev_priv
->rps
.sw_turbo
.timeout
) + jiffies
);
1993 dev_priv
->rps
.sw_turbo
.flip_timer
.expires
=
1994 usecs_to_jiffies(dev_priv
->rps
.sw_turbo
.timeout
) + jiffies
;
1995 add_timer(&dev_priv
->rps
.sw_turbo
.flip_timer
);
1996 atomic_set(&dev_priv
->rps
.sw_turbo
.flip_received
, true);
1999 bdw_software_turbo(dev
);
2002 /* The RPS events need forcewake, so we add them to a work queue and mask their
2003 * IMR bits until the work is done. Other interrupts can be processed without
2004 * the work queue. */
2005 static void gen6_rps_irq_handler(struct drm_i915_private
*dev_priv
, u32 pm_iir
)
2007 if (pm_iir
& dev_priv
->pm_rps_events
) {
2008 spin_lock(&dev_priv
->irq_lock
);
2009 dev_priv
->rps
.pm_iir
|= pm_iir
& dev_priv
->pm_rps_events
;
2010 gen6_disable_pm_irq(dev_priv
, pm_iir
& dev_priv
->pm_rps_events
);
2011 spin_unlock(&dev_priv
->irq_lock
);
2013 queue_work(dev_priv
->wq
, &dev_priv
->rps
.work
);
2016 if (HAS_VEBOX(dev_priv
->dev
)) {
2017 if (pm_iir
& PM_VEBOX_USER_INTERRUPT
)
2018 notify_ring(dev_priv
->dev
, &dev_priv
->ring
[VECS
]);
2020 if (pm_iir
& PM_VEBOX_CS_ERROR_INTERRUPT
) {
2021 i915_handle_error(dev_priv
->dev
, false,
2022 "VEBOX CS error interrupt 0x%08x",
2028 static bool intel_pipe_handle_vblank(struct drm_device
*dev
, enum pipe pipe
)
2030 if (!drm_handle_vblank(dev
, pipe
))
2036 static void valleyview_pipestat_irq_handler(struct drm_device
*dev
, u32 iir
)
2038 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2039 u32 pipe_stats
[I915_MAX_PIPES
] = { };
2042 spin_lock(&dev_priv
->irq_lock
);
2043 for_each_pipe(dev_priv
, pipe
) {
2045 u32 mask
, iir_bit
= 0;
2048 * PIPESTAT bits get signalled even when the interrupt is
2049 * disabled with the mask bits, and some of the status bits do
2050 * not generate interrupts at all (like the underrun bit). Hence
2051 * we need to be careful that we only handle what we want to
2055 if (__cpu_fifo_underrun_reporting_enabled(dev
, pipe
))
2056 mask
|= PIPE_FIFO_UNDERRUN_STATUS
;
2060 iir_bit
= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
;
2063 iir_bit
= I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
;
2066 iir_bit
= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT
;
2070 mask
|= dev_priv
->pipestat_irq_mask
[pipe
];
2075 reg
= PIPESTAT(pipe
);
2076 mask
|= PIPESTAT_INT_ENABLE_MASK
;
2077 pipe_stats
[pipe
] = I915_READ(reg
) & mask
;
2080 * Clear the PIPE*STAT regs before the IIR
2082 if (pipe_stats
[pipe
] & (PIPE_FIFO_UNDERRUN_STATUS
|
2083 PIPESTAT_INT_STATUS_MASK
))
2084 I915_WRITE(reg
, pipe_stats
[pipe
]);
2086 spin_unlock(&dev_priv
->irq_lock
);
2088 for_each_pipe(dev_priv
, pipe
) {
2089 if (pipe_stats
[pipe
] & PIPE_START_VBLANK_INTERRUPT_STATUS
&&
2090 intel_pipe_handle_vblank(dev
, pipe
))
2091 intel_check_page_flip(dev
, pipe
);
2093 if (pipe_stats
[pipe
] & PLANE_FLIP_DONE_INT_STATUS_VLV
) {
2094 intel_prepare_page_flip(dev
, pipe
);
2095 intel_finish_page_flip(dev
, pipe
);
2098 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
2099 i9xx_pipe_crc_irq_handler(dev
, pipe
);
2101 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
&&
2102 intel_set_cpu_fifo_underrun_reporting(dev
, pipe
, false))
2103 DRM_ERROR("pipe %c underrun\n", pipe_name(pipe
));
2106 if (pipe_stats
[0] & PIPE_GMBUS_INTERRUPT_STATUS
)
2107 gmbus_irq_handler(dev
);
2110 static void i9xx_hpd_irq_handler(struct drm_device
*dev
)
2112 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2113 u32 hotplug_status
= I915_READ(PORT_HOTPLUG_STAT
);
2115 if (hotplug_status
) {
2116 I915_WRITE(PORT_HOTPLUG_STAT
, hotplug_status
);
2118 * Make sure hotplug status is cleared before we clear IIR, or else we
2119 * may miss hotplug events.
2121 POSTING_READ(PORT_HOTPLUG_STAT
);
2124 u32 hotplug_trigger
= hotplug_status
& HOTPLUG_INT_STATUS_G4X
;
2126 intel_hpd_irq_handler(dev
, hotplug_trigger
, 0, hpd_status_g4x
);
2128 u32 hotplug_trigger
= hotplug_status
& HOTPLUG_INT_STATUS_I915
;
2130 intel_hpd_irq_handler(dev
, hotplug_trigger
, 0, hpd_status_i915
);
2133 if ((IS_G4X(dev
) || IS_VALLEYVIEW(dev
)) &&
2134 hotplug_status
& DP_AUX_CHANNEL_MASK_INT_STATUS_G4X
)
2135 dp_aux_irq_handler(dev
);
2139 static irqreturn_t
valleyview_irq_handler(int irq
, void *arg
)
2141 struct drm_device
*dev
= arg
;
2142 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2143 u32 iir
, gt_iir
, pm_iir
;
2144 irqreturn_t ret
= IRQ_NONE
;
2147 /* Find, clear, then process each source of interrupt */
2149 gt_iir
= I915_READ(GTIIR
);
2151 I915_WRITE(GTIIR
, gt_iir
);
2153 pm_iir
= I915_READ(GEN6_PMIIR
);
2155 I915_WRITE(GEN6_PMIIR
, pm_iir
);
2157 iir
= I915_READ(VLV_IIR
);
2159 /* Consume port before clearing IIR or we'll miss events */
2160 if (iir
& I915_DISPLAY_PORT_INTERRUPT
)
2161 i9xx_hpd_irq_handler(dev
);
2162 I915_WRITE(VLV_IIR
, iir
);
2165 if (gt_iir
== 0 && pm_iir
== 0 && iir
== 0)
2171 snb_gt_irq_handler(dev
, dev_priv
, gt_iir
);
2173 gen6_rps_irq_handler(dev_priv
, pm_iir
);
2174 /* Call regardless, as some status bits might not be
2175 * signalled in iir */
2176 valleyview_pipestat_irq_handler(dev
, iir
);
2183 static irqreturn_t
cherryview_irq_handler(int irq
, void *arg
)
2185 struct drm_device
*dev
= arg
;
2186 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2187 u32 master_ctl
, iir
;
2188 irqreturn_t ret
= IRQ_NONE
;
2191 master_ctl
= I915_READ(GEN8_MASTER_IRQ
) & ~GEN8_MASTER_IRQ_CONTROL
;
2192 iir
= I915_READ(VLV_IIR
);
2194 if (master_ctl
== 0 && iir
== 0)
2199 I915_WRITE(GEN8_MASTER_IRQ
, 0);
2201 /* Find, clear, then process each source of interrupt */
2204 /* Consume port before clearing IIR or we'll miss events */
2205 if (iir
& I915_DISPLAY_PORT_INTERRUPT
)
2206 i9xx_hpd_irq_handler(dev
);
2207 I915_WRITE(VLV_IIR
, iir
);
2210 gen8_gt_irq_handler(dev
, dev_priv
, master_ctl
);
2212 /* Call regardless, as some status bits might not be
2213 * signalled in iir */
2214 valleyview_pipestat_irq_handler(dev
, iir
);
2216 I915_WRITE(GEN8_MASTER_IRQ
, DE_MASTER_IRQ_CONTROL
);
2217 POSTING_READ(GEN8_MASTER_IRQ
);
2223 static void ibx_irq_handler(struct drm_device
*dev
, u32 pch_iir
)
2225 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2227 u32 hotplug_trigger
= pch_iir
& SDE_HOTPLUG_MASK
;
2228 u32 dig_hotplug_reg
;
2230 dig_hotplug_reg
= I915_READ(PCH_PORT_HOTPLUG
);
2231 I915_WRITE(PCH_PORT_HOTPLUG
, dig_hotplug_reg
);
2233 intel_hpd_irq_handler(dev
, hotplug_trigger
, dig_hotplug_reg
, hpd_ibx
);
2235 if (pch_iir
& SDE_AUDIO_POWER_MASK
) {
2236 int port
= ffs((pch_iir
& SDE_AUDIO_POWER_MASK
) >>
2237 SDE_AUDIO_POWER_SHIFT
);
2238 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
2242 if (pch_iir
& SDE_AUX_MASK
)
2243 dp_aux_irq_handler(dev
);
2245 if (pch_iir
& SDE_GMBUS
)
2246 gmbus_irq_handler(dev
);
2248 if (pch_iir
& SDE_AUDIO_HDCP_MASK
)
2249 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
2251 if (pch_iir
& SDE_AUDIO_TRANS_MASK
)
2252 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
2254 if (pch_iir
& SDE_POISON
)
2255 DRM_ERROR("PCH poison interrupt\n");
2257 if (pch_iir
& SDE_FDI_MASK
)
2258 for_each_pipe(dev_priv
, pipe
)
2259 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
2261 I915_READ(FDI_RX_IIR(pipe
)));
2263 if (pch_iir
& (SDE_TRANSB_CRC_DONE
| SDE_TRANSA_CRC_DONE
))
2264 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
2266 if (pch_iir
& (SDE_TRANSB_CRC_ERR
| SDE_TRANSA_CRC_ERR
))
2267 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
2269 if (pch_iir
& SDE_TRANSA_FIFO_UNDER
)
2270 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_A
,
2272 DRM_ERROR("PCH transcoder A FIFO underrun\n");
2274 if (pch_iir
& SDE_TRANSB_FIFO_UNDER
)
2275 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_B
,
2277 DRM_ERROR("PCH transcoder B FIFO underrun\n");
2280 static void ivb_err_int_handler(struct drm_device
*dev
)
2282 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2283 u32 err_int
= I915_READ(GEN7_ERR_INT
);
2286 if (err_int
& ERR_INT_POISON
)
2287 DRM_ERROR("Poison interrupt\n");
2289 for_each_pipe(dev_priv
, pipe
) {
2290 if (err_int
& ERR_INT_FIFO_UNDERRUN(pipe
)) {
2291 if (intel_set_cpu_fifo_underrun_reporting(dev
, pipe
,
2293 DRM_ERROR("Pipe %c FIFO underrun\n",
2297 if (err_int
& ERR_INT_PIPE_CRC_DONE(pipe
)) {
2298 if (IS_IVYBRIDGE(dev
))
2299 ivb_pipe_crc_irq_handler(dev
, pipe
);
2301 hsw_pipe_crc_irq_handler(dev
, pipe
);
2305 I915_WRITE(GEN7_ERR_INT
, err_int
);
2308 static void cpt_serr_int_handler(struct drm_device
*dev
)
2310 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2311 u32 serr_int
= I915_READ(SERR_INT
);
2313 if (serr_int
& SERR_INT_POISON
)
2314 DRM_ERROR("PCH poison interrupt\n");
2316 if (serr_int
& SERR_INT_TRANS_A_FIFO_UNDERRUN
)
2317 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_A
,
2319 DRM_ERROR("PCH transcoder A FIFO underrun\n");
2321 if (serr_int
& SERR_INT_TRANS_B_FIFO_UNDERRUN
)
2322 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_B
,
2324 DRM_ERROR("PCH transcoder B FIFO underrun\n");
2326 if (serr_int
& SERR_INT_TRANS_C_FIFO_UNDERRUN
)
2327 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_C
,
2329 DRM_ERROR("PCH transcoder C FIFO underrun\n");
2331 I915_WRITE(SERR_INT
, serr_int
);
2334 static void cpt_irq_handler(struct drm_device
*dev
, u32 pch_iir
)
2336 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2338 u32 hotplug_trigger
= pch_iir
& SDE_HOTPLUG_MASK_CPT
;
2339 u32 dig_hotplug_reg
;
2341 dig_hotplug_reg
= I915_READ(PCH_PORT_HOTPLUG
);
2342 I915_WRITE(PCH_PORT_HOTPLUG
, dig_hotplug_reg
);
2344 intel_hpd_irq_handler(dev
, hotplug_trigger
, dig_hotplug_reg
, hpd_cpt
);
2346 if (pch_iir
& SDE_AUDIO_POWER_MASK_CPT
) {
2347 int port
= ffs((pch_iir
& SDE_AUDIO_POWER_MASK_CPT
) >>
2348 SDE_AUDIO_POWER_SHIFT_CPT
);
2349 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
2353 if (pch_iir
& SDE_AUX_MASK_CPT
)
2354 dp_aux_irq_handler(dev
);
2356 if (pch_iir
& SDE_GMBUS_CPT
)
2357 gmbus_irq_handler(dev
);
2359 if (pch_iir
& SDE_AUDIO_CP_REQ_CPT
)
2360 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
2362 if (pch_iir
& SDE_AUDIO_CP_CHG_CPT
)
2363 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
2365 if (pch_iir
& SDE_FDI_MASK_CPT
)
2366 for_each_pipe(dev_priv
, pipe
)
2367 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
2369 I915_READ(FDI_RX_IIR(pipe
)));
2371 if (pch_iir
& SDE_ERROR_CPT
)
2372 cpt_serr_int_handler(dev
);
2375 static void ilk_display_irq_handler(struct drm_device
*dev
, u32 de_iir
)
2377 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2380 if (de_iir
& DE_AUX_CHANNEL_A
)
2381 dp_aux_irq_handler(dev
);
2383 if (de_iir
& DE_GSE
)
2384 intel_opregion_asle_intr(dev
);
2386 if (de_iir
& DE_POISON
)
2387 DRM_ERROR("Poison interrupt\n");
2389 for_each_pipe(dev_priv
, pipe
) {
2390 if (de_iir
& DE_PIPE_VBLANK(pipe
) &&
2391 intel_pipe_handle_vblank(dev
, pipe
))
2392 intel_check_page_flip(dev
, pipe
);
2394 if (de_iir
& DE_PIPE_FIFO_UNDERRUN(pipe
))
2395 if (intel_set_cpu_fifo_underrun_reporting(dev
, pipe
, false))
2396 DRM_ERROR("Pipe %c FIFO underrun\n",
2399 if (de_iir
& DE_PIPE_CRC_DONE(pipe
))
2400 i9xx_pipe_crc_irq_handler(dev
, pipe
);
2402 /* plane/pipes map 1:1 on ilk+ */
2403 if (de_iir
& DE_PLANE_FLIP_DONE(pipe
)) {
2404 intel_prepare_page_flip(dev
, pipe
);
2405 intel_finish_page_flip_plane(dev
, pipe
);
2409 /* check event from PCH */
2410 if (de_iir
& DE_PCH_EVENT
) {
2411 u32 pch_iir
= I915_READ(SDEIIR
);
2413 if (HAS_PCH_CPT(dev
))
2414 cpt_irq_handler(dev
, pch_iir
);
2416 ibx_irq_handler(dev
, pch_iir
);
2418 /* should clear PCH hotplug event before clear CPU irq */
2419 I915_WRITE(SDEIIR
, pch_iir
);
2422 if (IS_GEN5(dev
) && de_iir
& DE_PCU_EVENT
)
2423 ironlake_rps_change_irq_handler(dev
);
2426 static void ivb_display_irq_handler(struct drm_device
*dev
, u32 de_iir
)
2428 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2431 if (de_iir
& DE_ERR_INT_IVB
)
2432 ivb_err_int_handler(dev
);
2434 if (de_iir
& DE_AUX_CHANNEL_A_IVB
)
2435 dp_aux_irq_handler(dev
);
2437 if (de_iir
& DE_GSE_IVB
)
2438 intel_opregion_asle_intr(dev
);
2440 for_each_pipe(dev_priv
, pipe
) {
2441 if (de_iir
& (DE_PIPE_VBLANK_IVB(pipe
)) &&
2442 intel_pipe_handle_vblank(dev
, pipe
))
2443 intel_check_page_flip(dev
, pipe
);
2445 /* plane/pipes map 1:1 on ilk+ */
2446 if (de_iir
& DE_PLANE_FLIP_DONE_IVB(pipe
)) {
2447 intel_prepare_page_flip(dev
, pipe
);
2448 intel_finish_page_flip_plane(dev
, pipe
);
2452 /* check event from PCH */
2453 if (!HAS_PCH_NOP(dev
) && (de_iir
& DE_PCH_EVENT_IVB
)) {
2454 u32 pch_iir
= I915_READ(SDEIIR
);
2456 cpt_irq_handler(dev
, pch_iir
);
2458 /* clear PCH hotplug event before clear CPU irq */
2459 I915_WRITE(SDEIIR
, pch_iir
);
2464 * To handle irqs with the minimum potential races with fresh interrupts, we:
2465 * 1 - Disable Master Interrupt Control.
2466 * 2 - Find the source(s) of the interrupt.
2467 * 3 - Clear the Interrupt Identity bits (IIR).
2468 * 4 - Process the interrupt(s) that had bits set in the IIRs.
2469 * 5 - Re-enable Master Interrupt Control.
2471 static irqreturn_t
ironlake_irq_handler(int irq
, void *arg
)
2473 struct drm_device
*dev
= arg
;
2474 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2475 u32 de_iir
, gt_iir
, de_ier
, sde_ier
= 0;
2476 irqreturn_t ret
= IRQ_NONE
;
2478 /* We get interrupts on unclaimed registers, so check for this before we
2479 * do any I915_{READ,WRITE}. */
2480 intel_uncore_check_errors(dev
);
2482 /* disable master interrupt before clearing iir */
2483 de_ier
= I915_READ(DEIER
);
2484 I915_WRITE(DEIER
, de_ier
& ~DE_MASTER_IRQ_CONTROL
);
2485 POSTING_READ(DEIER
);
2487 /* Disable south interrupts. We'll only write to SDEIIR once, so further
2488 * interrupts will will be stored on its back queue, and then we'll be
2489 * able to process them after we restore SDEIER (as soon as we restore
2490 * it, we'll get an interrupt if SDEIIR still has something to process
2491 * due to its back queue). */
2492 if (!HAS_PCH_NOP(dev
)) {
2493 sde_ier
= I915_READ(SDEIER
);
2494 I915_WRITE(SDEIER
, 0);
2495 POSTING_READ(SDEIER
);
2498 /* Find, clear, then process each source of interrupt */
2500 gt_iir
= I915_READ(GTIIR
);
2502 I915_WRITE(GTIIR
, gt_iir
);
2504 if (INTEL_INFO(dev
)->gen
>= 6)
2505 snb_gt_irq_handler(dev
, dev_priv
, gt_iir
);
2507 ilk_gt_irq_handler(dev
, dev_priv
, gt_iir
);
2510 de_iir
= I915_READ(DEIIR
);
2512 I915_WRITE(DEIIR
, de_iir
);
2514 if (INTEL_INFO(dev
)->gen
>= 7)
2515 ivb_display_irq_handler(dev
, de_iir
);
2517 ilk_display_irq_handler(dev
, de_iir
);
2520 if (INTEL_INFO(dev
)->gen
>= 6) {
2521 u32 pm_iir
= I915_READ(GEN6_PMIIR
);
2523 I915_WRITE(GEN6_PMIIR
, pm_iir
);
2525 gen6_rps_irq_handler(dev_priv
, pm_iir
);
2529 I915_WRITE(DEIER
, de_ier
);
2530 POSTING_READ(DEIER
);
2531 if (!HAS_PCH_NOP(dev
)) {
2532 I915_WRITE(SDEIER
, sde_ier
);
2533 POSTING_READ(SDEIER
);
2539 static irqreturn_t
gen8_irq_handler(int irq
, void *arg
)
2541 struct drm_device
*dev
= arg
;
2542 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2544 irqreturn_t ret
= IRQ_NONE
;
2548 master_ctl
= I915_READ(GEN8_MASTER_IRQ
);
2549 master_ctl
&= ~GEN8_MASTER_IRQ_CONTROL
;
2553 I915_WRITE(GEN8_MASTER_IRQ
, 0);
2554 POSTING_READ(GEN8_MASTER_IRQ
);
2556 /* Find, clear, then process each source of interrupt */
2558 ret
= gen8_gt_irq_handler(dev
, dev_priv
, master_ctl
);
2560 if (master_ctl
& GEN8_DE_MISC_IRQ
) {
2561 tmp
= I915_READ(GEN8_DE_MISC_IIR
);
2563 I915_WRITE(GEN8_DE_MISC_IIR
, tmp
);
2565 if (tmp
& GEN8_DE_MISC_GSE
)
2566 intel_opregion_asle_intr(dev
);
2568 DRM_ERROR("Unexpected DE Misc interrupt\n");
2571 DRM_ERROR("The master control interrupt lied (DE MISC)!\n");
2574 if (master_ctl
& GEN8_DE_PORT_IRQ
) {
2575 tmp
= I915_READ(GEN8_DE_PORT_IIR
);
2577 I915_WRITE(GEN8_DE_PORT_IIR
, tmp
);
2579 if (tmp
& GEN8_AUX_CHANNEL_A
)
2580 dp_aux_irq_handler(dev
);
2582 DRM_ERROR("Unexpected DE Port interrupt\n");
2585 DRM_ERROR("The master control interrupt lied (DE PORT)!\n");
2588 for_each_pipe(dev_priv
, pipe
) {
2591 if (!(master_ctl
& GEN8_DE_PIPE_IRQ(pipe
)))
2594 pipe_iir
= I915_READ(GEN8_DE_PIPE_IIR(pipe
));
2597 I915_WRITE(GEN8_DE_PIPE_IIR(pipe
), pipe_iir
);
2598 if (pipe_iir
& GEN8_PIPE_VBLANK
&&
2599 intel_pipe_handle_vblank(dev
, pipe
))
2600 intel_check_page_flip(dev
, pipe
);
2602 if (pipe_iir
& GEN8_PIPE_PRIMARY_FLIP_DONE
) {
2603 intel_prepare_page_flip(dev
, pipe
);
2604 intel_finish_page_flip_plane(dev
, pipe
);
2607 if (pipe_iir
& GEN8_PIPE_CDCLK_CRC_DONE
)
2608 hsw_pipe_crc_irq_handler(dev
, pipe
);
2610 if (pipe_iir
& GEN8_PIPE_FIFO_UNDERRUN
) {
2611 if (intel_set_cpu_fifo_underrun_reporting(dev
, pipe
,
2613 DRM_ERROR("Pipe %c FIFO underrun\n",
2617 if (pipe_iir
& GEN8_DE_PIPE_IRQ_FAULT_ERRORS
) {
2618 DRM_ERROR("Fault errors on pipe %c\n: 0x%08x",
2620 pipe_iir
& GEN8_DE_PIPE_IRQ_FAULT_ERRORS
);
2623 DRM_ERROR("The master control interrupt lied (DE PIPE)!\n");
2626 if (!HAS_PCH_NOP(dev
) && master_ctl
& GEN8_DE_PCH_IRQ
) {
2628 * FIXME(BDW): Assume for now that the new interrupt handling
2629 * scheme also closed the SDE interrupt handling race we've seen
2630 * on older pch-split platforms. But this needs testing.
2632 u32 pch_iir
= I915_READ(SDEIIR
);
2634 I915_WRITE(SDEIIR
, pch_iir
);
2636 cpt_irq_handler(dev
, pch_iir
);
2638 DRM_ERROR("The master control interrupt lied (SDE)!\n");
2642 I915_WRITE(GEN8_MASTER_IRQ
, GEN8_MASTER_IRQ_CONTROL
);
2643 POSTING_READ(GEN8_MASTER_IRQ
);
2648 static void i915_error_wake_up(struct drm_i915_private
*dev_priv
,
2649 bool reset_completed
)
2651 struct intel_engine_cs
*ring
;
2655 * Notify all waiters for GPU completion events that reset state has
2656 * been changed, and that they need to restart their wait after
2657 * checking for potential errors (and bail out to drop locks if there is
2658 * a gpu reset pending so that i915_error_work_func can acquire them).
2661 /* Wake up __wait_seqno, potentially holding dev->struct_mutex. */
2662 for_each_ring(ring
, dev_priv
, i
)
2663 wake_up_all(&ring
->irq_queue
);
2665 /* Wake up intel_crtc_wait_for_pending_flips, holding crtc->mutex. */
2666 wake_up_all(&dev_priv
->pending_flip_queue
);
2669 * Signal tasks blocked in i915_gem_wait_for_error that the pending
2670 * reset state is cleared.
2672 if (reset_completed
)
2673 wake_up_all(&dev_priv
->gpu_error
.reset_queue
);
2677 * i915_error_work_func - do process context error handling work
2678 * @work: work struct
2680 * Fire an error uevent so userspace can see that a hang or error
2683 static void i915_error_work_func(struct work_struct
*work
)
2685 struct i915_gpu_error
*error
= container_of(work
, struct i915_gpu_error
,
2687 struct drm_i915_private
*dev_priv
=
2688 container_of(error
, struct drm_i915_private
, gpu_error
);
2689 struct drm_device
*dev
= dev_priv
->dev
;
2690 char *error_event
[] = { I915_ERROR_UEVENT
"=1", NULL
};
2691 char *reset_event
[] = { I915_RESET_UEVENT
"=1", NULL
};
2692 char *reset_done_event
[] = { I915_ERROR_UEVENT
"=0", NULL
};
2695 kobject_uevent_env(&dev
->primary
->kdev
->kobj
, KOBJ_CHANGE
, error_event
);
2698 * Note that there's only one work item which does gpu resets, so we
2699 * need not worry about concurrent gpu resets potentially incrementing
2700 * error->reset_counter twice. We only need to take care of another
2701 * racing irq/hangcheck declaring the gpu dead for a second time. A
2702 * quick check for that is good enough: schedule_work ensures the
2703 * correct ordering between hang detection and this work item, and since
2704 * the reset in-progress bit is only ever set by code outside of this
2705 * work we don't need to worry about any other races.
2707 if (i915_reset_in_progress(error
) && !i915_terminally_wedged(error
)) {
2708 DRM_DEBUG_DRIVER("resetting chip\n");
2709 kobject_uevent_env(&dev
->primary
->kdev
->kobj
, KOBJ_CHANGE
,
2713 * In most cases it's guaranteed that we get here with an RPM
2714 * reference held, for example because there is a pending GPU
2715 * request that won't finish until the reset is done. This
2716 * isn't the case at least when we get here by doing a
2717 * simulated reset via debugs, so get an RPM reference.
2719 intel_runtime_pm_get(dev_priv
);
2721 * All state reset _must_ be completed before we update the
2722 * reset counter, for otherwise waiters might miss the reset
2723 * pending state and not properly drop locks, resulting in
2724 * deadlocks with the reset work.
2726 ret
= i915_reset(dev
);
2728 intel_display_handle_reset(dev
);
2730 intel_runtime_pm_put(dev_priv
);
2734 * After all the gem state is reset, increment the reset
2735 * counter and wake up everyone waiting for the reset to
2738 * Since unlock operations are a one-sided barrier only,
2739 * we need to insert a barrier here to order any seqno
2741 * the counter increment.
2743 smp_mb__before_atomic();
2744 atomic_inc(&dev_priv
->gpu_error
.reset_counter
);
2746 kobject_uevent_env(&dev
->primary
->kdev
->kobj
,
2747 KOBJ_CHANGE
, reset_done_event
);
2749 atomic_set_mask(I915_WEDGED
, &error
->reset_counter
);
2753 * Note: The wake_up also serves as a memory barrier so that
2754 * waiters see the update value of the reset counter atomic_t.
2756 i915_error_wake_up(dev_priv
, true);
2760 static void i915_report_and_clear_eir(struct drm_device
*dev
)
2762 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2763 uint32_t instdone
[I915_NUM_INSTDONE_REG
];
2764 u32 eir
= I915_READ(EIR
);
2770 pr_err("render error detected, EIR: 0x%08x\n", eir
);
2772 i915_get_extra_instdone(dev
, instdone
);
2775 if (eir
& (GM45_ERROR_MEM_PRIV
| GM45_ERROR_CP_PRIV
)) {
2776 u32 ipeir
= I915_READ(IPEIR_I965
);
2778 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965
));
2779 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965
));
2780 for (i
= 0; i
< ARRAY_SIZE(instdone
); i
++)
2781 pr_err(" INSTDONE_%d: 0x%08x\n", i
, instdone
[i
]);
2782 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS
));
2783 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965
));
2784 I915_WRITE(IPEIR_I965
, ipeir
);
2785 POSTING_READ(IPEIR_I965
);
2787 if (eir
& GM45_ERROR_PAGE_TABLE
) {
2788 u32 pgtbl_err
= I915_READ(PGTBL_ER
);
2789 pr_err("page table error\n");
2790 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err
);
2791 I915_WRITE(PGTBL_ER
, pgtbl_err
);
2792 POSTING_READ(PGTBL_ER
);
2796 if (!IS_GEN2(dev
)) {
2797 if (eir
& I915_ERROR_PAGE_TABLE
) {
2798 u32 pgtbl_err
= I915_READ(PGTBL_ER
);
2799 pr_err("page table error\n");
2800 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err
);
2801 I915_WRITE(PGTBL_ER
, pgtbl_err
);
2802 POSTING_READ(PGTBL_ER
);
2806 if (eir
& I915_ERROR_MEMORY_REFRESH
) {
2807 pr_err("memory refresh error:\n");
2808 for_each_pipe(dev_priv
, pipe
)
2809 pr_err("pipe %c stat: 0x%08x\n",
2810 pipe_name(pipe
), I915_READ(PIPESTAT(pipe
)));
2811 /* pipestat has already been acked */
2813 if (eir
& I915_ERROR_INSTRUCTION
) {
2814 pr_err("instruction error\n");
2815 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM
));
2816 for (i
= 0; i
< ARRAY_SIZE(instdone
); i
++)
2817 pr_err(" INSTDONE_%d: 0x%08x\n", i
, instdone
[i
]);
2818 if (INTEL_INFO(dev
)->gen
< 4) {
2819 u32 ipeir
= I915_READ(IPEIR
);
2821 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR
));
2822 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR
));
2823 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD
));
2824 I915_WRITE(IPEIR
, ipeir
);
2825 POSTING_READ(IPEIR
);
2827 u32 ipeir
= I915_READ(IPEIR_I965
);
2829 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965
));
2830 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965
));
2831 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS
));
2832 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965
));
2833 I915_WRITE(IPEIR_I965
, ipeir
);
2834 POSTING_READ(IPEIR_I965
);
2838 I915_WRITE(EIR
, eir
);
2840 eir
= I915_READ(EIR
);
2843 * some errors might have become stuck,
2846 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir
);
2847 I915_WRITE(EMR
, I915_READ(EMR
) | eir
);
2848 I915_WRITE(IIR
, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
2853 * i915_handle_error - handle an error interrupt
2856 * Do some basic checking of regsiter state at error interrupt time and
2857 * dump it to the syslog. Also call i915_capture_error_state() to make
2858 * sure we get a record and make it available in debugfs. Fire a uevent
2859 * so userspace knows something bad happened (should trigger collection
2860 * of a ring dump etc.).
2862 void i915_handle_error(struct drm_device
*dev
, bool wedged
,
2863 const char *fmt
, ...)
2865 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2869 va_start(args
, fmt
);
2870 vscnprintf(error_msg
, sizeof(error_msg
), fmt
, args
);
2873 i915_capture_error_state(dev
, wedged
, error_msg
);
2874 i915_report_and_clear_eir(dev
);
2877 atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG
,
2878 &dev_priv
->gpu_error
.reset_counter
);
2881 * Wakeup waiting processes so that the reset work function
2882 * i915_error_work_func doesn't deadlock trying to grab various
2883 * locks. By bumping the reset counter first, the woken
2884 * processes will see a reset in progress and back off,
2885 * releasing their locks and then wait for the reset completion.
2886 * We must do this for _all_ gpu waiters that might hold locks
2887 * that the reset work needs to acquire.
2889 * Note: The wake_up serves as the required memory barrier to
2890 * ensure that the waiters see the updated value of the reset
2893 i915_error_wake_up(dev_priv
, false);
2897 * Our reset work can grab modeset locks (since it needs to reset the
2898 * state of outstanding pagelips). Hence it must not be run on our own
2899 * dev-priv->wq work queue for otherwise the flush_work in the pageflip
2900 * code will deadlock.
2902 schedule_work(&dev_priv
->gpu_error
.work
);
2905 /* Called from drm generic code, passed 'crtc' which
2906 * we use as a pipe index
2908 static int i915_enable_vblank(struct drm_device
*dev
, int pipe
)
2910 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2911 unsigned long irqflags
;
2913 if (!i915_pipe_enabled(dev
, pipe
))
2916 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2917 if (INTEL_INFO(dev
)->gen
>= 4)
2918 i915_enable_pipestat(dev_priv
, pipe
,
2919 PIPE_START_VBLANK_INTERRUPT_STATUS
);
2921 i915_enable_pipestat(dev_priv
, pipe
,
2922 PIPE_VBLANK_INTERRUPT_STATUS
);
2923 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2928 static int ironlake_enable_vblank(struct drm_device
*dev
, int pipe
)
2930 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2931 unsigned long irqflags
;
2932 uint32_t bit
= (INTEL_INFO(dev
)->gen
>= 7) ? DE_PIPE_VBLANK_IVB(pipe
) :
2933 DE_PIPE_VBLANK(pipe
);
2935 if (!i915_pipe_enabled(dev
, pipe
))
2938 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2939 ironlake_enable_display_irq(dev_priv
, bit
);
2940 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2945 static int valleyview_enable_vblank(struct drm_device
*dev
, int pipe
)
2947 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2948 unsigned long irqflags
;
2950 if (!i915_pipe_enabled(dev
, pipe
))
2953 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2954 i915_enable_pipestat(dev_priv
, pipe
,
2955 PIPE_START_VBLANK_INTERRUPT_STATUS
);
2956 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2961 static int gen8_enable_vblank(struct drm_device
*dev
, int pipe
)
2963 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2964 unsigned long irqflags
;
2966 if (!i915_pipe_enabled(dev
, pipe
))
2969 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2970 dev_priv
->de_irq_mask
[pipe
] &= ~GEN8_PIPE_VBLANK
;
2971 I915_WRITE(GEN8_DE_PIPE_IMR(pipe
), dev_priv
->de_irq_mask
[pipe
]);
2972 POSTING_READ(GEN8_DE_PIPE_IMR(pipe
));
2973 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2977 /* Called from drm generic code, passed 'crtc' which
2978 * we use as a pipe index
2980 static void i915_disable_vblank(struct drm_device
*dev
, int pipe
)
2982 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2983 unsigned long irqflags
;
2985 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2986 i915_disable_pipestat(dev_priv
, pipe
,
2987 PIPE_VBLANK_INTERRUPT_STATUS
|
2988 PIPE_START_VBLANK_INTERRUPT_STATUS
);
2989 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2992 static void ironlake_disable_vblank(struct drm_device
*dev
, int pipe
)
2994 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2995 unsigned long irqflags
;
2996 uint32_t bit
= (INTEL_INFO(dev
)->gen
>= 7) ? DE_PIPE_VBLANK_IVB(pipe
) :
2997 DE_PIPE_VBLANK(pipe
);
2999 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3000 ironlake_disable_display_irq(dev_priv
, bit
);
3001 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3004 static void valleyview_disable_vblank(struct drm_device
*dev
, int pipe
)
3006 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3007 unsigned long irqflags
;
3009 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3010 i915_disable_pipestat(dev_priv
, pipe
,
3011 PIPE_START_VBLANK_INTERRUPT_STATUS
);
3012 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3015 static void gen8_disable_vblank(struct drm_device
*dev
, int pipe
)
3017 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3018 unsigned long irqflags
;
3020 if (!i915_pipe_enabled(dev
, pipe
))
3023 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3024 dev_priv
->de_irq_mask
[pipe
] |= GEN8_PIPE_VBLANK
;
3025 I915_WRITE(GEN8_DE_PIPE_IMR(pipe
), dev_priv
->de_irq_mask
[pipe
]);
3026 POSTING_READ(GEN8_DE_PIPE_IMR(pipe
));
3027 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3031 ring_last_seqno(struct intel_engine_cs
*ring
)
3033 return list_entry(ring
->request_list
.prev
,
3034 struct drm_i915_gem_request
, list
)->seqno
;
3038 ring_idle(struct intel_engine_cs
*ring
, u32 seqno
)
3040 return (list_empty(&ring
->request_list
) ||
3041 i915_seqno_passed(seqno
, ring_last_seqno(ring
)));
3045 ipehr_is_semaphore_wait(struct drm_device
*dev
, u32 ipehr
)
3047 if (INTEL_INFO(dev
)->gen
>= 8) {
3048 return (ipehr
>> 23) == 0x1c;
3050 ipehr
&= ~MI_SEMAPHORE_SYNC_MASK
;
3051 return ipehr
== (MI_SEMAPHORE_MBOX
| MI_SEMAPHORE_COMPARE
|
3052 MI_SEMAPHORE_REGISTER
);
3056 static struct intel_engine_cs
*
3057 semaphore_wait_to_signaller_ring(struct intel_engine_cs
*ring
, u32 ipehr
, u64 offset
)
3059 struct drm_i915_private
*dev_priv
= ring
->dev
->dev_private
;
3060 struct intel_engine_cs
*signaller
;
3063 if (INTEL_INFO(dev_priv
->dev
)->gen
>= 8) {
3064 for_each_ring(signaller
, dev_priv
, i
) {
3065 if (ring
== signaller
)
3068 if (offset
== signaller
->semaphore
.signal_ggtt
[ring
->id
])
3072 u32 sync_bits
= ipehr
& MI_SEMAPHORE_SYNC_MASK
;
3074 for_each_ring(signaller
, dev_priv
, i
) {
3075 if(ring
== signaller
)
3078 if (sync_bits
== signaller
->semaphore
.mbox
.wait
[ring
->id
])
3083 DRM_ERROR("No signaller ring found for ring %i, ipehr 0x%08x, offset 0x%016llx\n",
3084 ring
->id
, ipehr
, offset
);
3089 static struct intel_engine_cs
*
3090 semaphore_waits_for(struct intel_engine_cs
*ring
, u32
*seqno
)
3092 struct drm_i915_private
*dev_priv
= ring
->dev
->dev_private
;
3093 u32 cmd
, ipehr
, head
;
3097 ipehr
= I915_READ(RING_IPEHR(ring
->mmio_base
));
3098 if (!ipehr_is_semaphore_wait(ring
->dev
, ipehr
))
3102 * HEAD is likely pointing to the dword after the actual command,
3103 * so scan backwards until we find the MBOX. But limit it to just 3
3104 * or 4 dwords depending on the semaphore wait command size.
3105 * Note that we don't care about ACTHD here since that might
3106 * point at at batch, and semaphores are always emitted into the
3107 * ringbuffer itself.
3109 head
= I915_READ_HEAD(ring
) & HEAD_ADDR
;
3110 backwards
= (INTEL_INFO(ring
->dev
)->gen
>= 8) ? 5 : 4;
3112 for (i
= backwards
; i
; --i
) {
3114 * Be paranoid and presume the hw has gone off into the wild -
3115 * our ring is smaller than what the hardware (and hence
3116 * HEAD_ADDR) allows. Also handles wrap-around.
3118 head
&= ring
->buffer
->size
- 1;
3120 /* This here seems to blow up */
3121 cmd
= ioread32(ring
->buffer
->virtual_start
+ head
);
3131 *seqno
= ioread32(ring
->buffer
->virtual_start
+ head
+ 4) + 1;
3132 if (INTEL_INFO(ring
->dev
)->gen
>= 8) {
3133 offset
= ioread32(ring
->buffer
->virtual_start
+ head
+ 12);
3135 offset
= ioread32(ring
->buffer
->virtual_start
+ head
+ 8);
3137 return semaphore_wait_to_signaller_ring(ring
, ipehr
, offset
);
3140 static int semaphore_passed(struct intel_engine_cs
*ring
)
3142 struct drm_i915_private
*dev_priv
= ring
->dev
->dev_private
;
3143 struct intel_engine_cs
*signaller
;
3146 ring
->hangcheck
.deadlock
++;
3148 signaller
= semaphore_waits_for(ring
, &seqno
);
3149 if (signaller
== NULL
)
3152 /* Prevent pathological recursion due to driver bugs */
3153 if (signaller
->hangcheck
.deadlock
>= I915_NUM_RINGS
)
3156 if (i915_seqno_passed(signaller
->get_seqno(signaller
, false), seqno
))
3159 /* cursory check for an unkickable deadlock */
3160 if (I915_READ_CTL(signaller
) & RING_WAIT_SEMAPHORE
&&
3161 semaphore_passed(signaller
) < 0)
3167 static void semaphore_clear_deadlocks(struct drm_i915_private
*dev_priv
)
3169 struct intel_engine_cs
*ring
;
3172 for_each_ring(ring
, dev_priv
, i
)
3173 ring
->hangcheck
.deadlock
= 0;
3176 static enum intel_ring_hangcheck_action
3177 ring_stuck(struct intel_engine_cs
*ring
, u64 acthd
)
3179 struct drm_device
*dev
= ring
->dev
;
3180 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3183 if (acthd
!= ring
->hangcheck
.acthd
) {
3184 if (acthd
> ring
->hangcheck
.max_acthd
) {
3185 ring
->hangcheck
.max_acthd
= acthd
;
3186 return HANGCHECK_ACTIVE
;
3189 return HANGCHECK_ACTIVE_LOOP
;
3193 return HANGCHECK_HUNG
;
3195 /* Is the chip hanging on a WAIT_FOR_EVENT?
3196 * If so we can simply poke the RB_WAIT bit
3197 * and break the hang. This should work on
3198 * all but the second generation chipsets.
3200 tmp
= I915_READ_CTL(ring
);
3201 if (tmp
& RING_WAIT
) {
3202 i915_handle_error(dev
, false,
3203 "Kicking stuck wait on %s",
3205 I915_WRITE_CTL(ring
, tmp
);
3206 return HANGCHECK_KICK
;
3209 if (INTEL_INFO(dev
)->gen
>= 6 && tmp
& RING_WAIT_SEMAPHORE
) {
3210 switch (semaphore_passed(ring
)) {
3212 return HANGCHECK_HUNG
;
3214 i915_handle_error(dev
, false,
3215 "Kicking stuck semaphore on %s",
3217 I915_WRITE_CTL(ring
, tmp
);
3218 return HANGCHECK_KICK
;
3220 return HANGCHECK_WAIT
;
3224 return HANGCHECK_HUNG
;
3228 * This is called when the chip hasn't reported back with completed
3229 * batchbuffers in a long time. We keep track per ring seqno progress and
3230 * if there are no progress, hangcheck score for that ring is increased.
3231 * Further, acthd is inspected to see if the ring is stuck. On stuck case
3232 * we kick the ring. If we see no progress on three subsequent calls
3233 * we assume chip is wedged and try to fix it by resetting the chip.
3235 static void i915_hangcheck_elapsed(unsigned long data
)
3237 struct drm_device
*dev
= (struct drm_device
*)data
;
3238 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3239 struct intel_engine_cs
*ring
;
3241 int busy_count
= 0, rings_hung
= 0;
3242 bool stuck
[I915_NUM_RINGS
] = { 0 };
3247 if (!i915
.enable_hangcheck
)
3250 for_each_ring(ring
, dev_priv
, i
) {
3255 semaphore_clear_deadlocks(dev_priv
);
3257 seqno
= ring
->get_seqno(ring
, false);
3258 acthd
= intel_ring_get_active_head(ring
);
3260 if (ring
->hangcheck
.seqno
== seqno
) {
3261 if (ring_idle(ring
, seqno
)) {
3262 ring
->hangcheck
.action
= HANGCHECK_IDLE
;
3264 if (waitqueue_active(&ring
->irq_queue
)) {
3265 /* Issue a wake-up to catch stuck h/w. */
3266 if (!test_and_set_bit(ring
->id
, &dev_priv
->gpu_error
.missed_irq_rings
)) {
3267 if (!(dev_priv
->gpu_error
.test_irq_rings
& intel_ring_flag(ring
)))
3268 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
3271 DRM_INFO("Fake missed irq on %s\n",
3273 wake_up_all(&ring
->irq_queue
);
3275 /* Safeguard against driver failure */
3276 ring
->hangcheck
.score
+= BUSY
;
3280 /* We always increment the hangcheck score
3281 * if the ring is busy and still processing
3282 * the same request, so that no single request
3283 * can run indefinitely (such as a chain of
3284 * batches). The only time we do not increment
3285 * the hangcheck score on this ring, if this
3286 * ring is in a legitimate wait for another
3287 * ring. In that case the waiting ring is a
3288 * victim and we want to be sure we catch the
3289 * right culprit. Then every time we do kick
3290 * the ring, add a small increment to the
3291 * score so that we can catch a batch that is
3292 * being repeatedly kicked and so responsible
3293 * for stalling the machine.
3295 ring
->hangcheck
.action
= ring_stuck(ring
,
3298 switch (ring
->hangcheck
.action
) {
3299 case HANGCHECK_IDLE
:
3300 case HANGCHECK_WAIT
:
3301 case HANGCHECK_ACTIVE
:
3303 case HANGCHECK_ACTIVE_LOOP
:
3304 ring
->hangcheck
.score
+= BUSY
;
3306 case HANGCHECK_KICK
:
3307 ring
->hangcheck
.score
+= KICK
;
3309 case HANGCHECK_HUNG
:
3310 ring
->hangcheck
.score
+= HUNG
;
3316 ring
->hangcheck
.action
= HANGCHECK_ACTIVE
;
3318 /* Gradually reduce the count so that we catch DoS
3319 * attempts across multiple batches.
3321 if (ring
->hangcheck
.score
> 0)
3322 ring
->hangcheck
.score
--;
3324 ring
->hangcheck
.acthd
= ring
->hangcheck
.max_acthd
= 0;
3327 ring
->hangcheck
.seqno
= seqno
;
3328 ring
->hangcheck
.acthd
= acthd
;
3332 for_each_ring(ring
, dev_priv
, i
) {
3333 if (ring
->hangcheck
.score
>= HANGCHECK_SCORE_RING_HUNG
) {
3334 DRM_INFO("%s on %s\n",
3335 stuck
[i
] ? "stuck" : "no progress",
3342 return i915_handle_error(dev
, true, "Ring hung");
3345 /* Reset timer case chip hangs without another request
3347 i915_queue_hangcheck(dev
);
3350 void i915_queue_hangcheck(struct drm_device
*dev
)
3352 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3353 if (!i915
.enable_hangcheck
)
3356 mod_timer(&dev_priv
->gpu_error
.hangcheck_timer
,
3357 round_jiffies_up(jiffies
+ DRM_I915_HANGCHECK_JIFFIES
));
3360 static void ibx_irq_reset(struct drm_device
*dev
)
3362 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3364 if (HAS_PCH_NOP(dev
))
3367 GEN5_IRQ_RESET(SDE
);
3369 if (HAS_PCH_CPT(dev
) || HAS_PCH_LPT(dev
))
3370 I915_WRITE(SERR_INT
, 0xffffffff);
3374 * SDEIER is also touched by the interrupt handler to work around missed PCH
3375 * interrupts. Hence we can't update it after the interrupt handler is enabled -
3376 * instead we unconditionally enable all PCH interrupt sources here, but then
3377 * only unmask them as needed with SDEIMR.
3379 * This function needs to be called before interrupts are enabled.
3381 static void ibx_irq_pre_postinstall(struct drm_device
*dev
)
3383 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3385 if (HAS_PCH_NOP(dev
))
3388 WARN_ON(I915_READ(SDEIER
) != 0);
3389 I915_WRITE(SDEIER
, 0xffffffff);
3390 POSTING_READ(SDEIER
);
3393 static void gen5_gt_irq_reset(struct drm_device
*dev
)
3395 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3398 if (INTEL_INFO(dev
)->gen
>= 6)
3399 GEN5_IRQ_RESET(GEN6_PM
);
3404 static void ironlake_irq_reset(struct drm_device
*dev
)
3406 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3408 I915_WRITE(HWSTAM
, 0xffffffff);
3412 I915_WRITE(GEN7_ERR_INT
, 0xffffffff);
3414 gen5_gt_irq_reset(dev
);
3419 static void valleyview_irq_preinstall(struct drm_device
*dev
)
3421 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3425 I915_WRITE(VLV_IMR
, 0);
3426 I915_WRITE(RING_IMR(RENDER_RING_BASE
), 0);
3427 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE
), 0);
3428 I915_WRITE(RING_IMR(BLT_RING_BASE
), 0);
3431 I915_WRITE(GTIIR
, I915_READ(GTIIR
));
3432 I915_WRITE(GTIIR
, I915_READ(GTIIR
));
3434 gen5_gt_irq_reset(dev
);
3436 I915_WRITE(DPINVGTT
, 0xff);
3438 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3439 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
3440 for_each_pipe(dev_priv
, pipe
)
3441 I915_WRITE(PIPESTAT(pipe
), 0xffff);
3442 I915_WRITE(VLV_IIR
, 0xffffffff);
3443 I915_WRITE(VLV_IMR
, 0xffffffff);
3444 I915_WRITE(VLV_IER
, 0x0);
3445 POSTING_READ(VLV_IER
);
3448 static void gen8_gt_irq_reset(struct drm_i915_private
*dev_priv
)
3450 GEN8_IRQ_RESET_NDX(GT
, 0);
3451 GEN8_IRQ_RESET_NDX(GT
, 1);
3452 GEN8_IRQ_RESET_NDX(GT
, 2);
3453 GEN8_IRQ_RESET_NDX(GT
, 3);
3456 static void gen8_irq_reset(struct drm_device
*dev
)
3458 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3461 I915_WRITE(GEN8_MASTER_IRQ
, 0);
3462 POSTING_READ(GEN8_MASTER_IRQ
);
3464 gen8_gt_irq_reset(dev_priv
);
3466 for_each_pipe(dev_priv
, pipe
)
3467 if (intel_display_power_enabled(dev_priv
,
3468 POWER_DOMAIN_PIPE(pipe
)))
3469 GEN8_IRQ_RESET_NDX(DE_PIPE
, pipe
);
3471 GEN5_IRQ_RESET(GEN8_DE_PORT_
);
3472 GEN5_IRQ_RESET(GEN8_DE_MISC_
);
3473 GEN5_IRQ_RESET(GEN8_PCU_
);
3478 void gen8_irq_power_well_post_enable(struct drm_i915_private
*dev_priv
)
3480 unsigned long irqflags
;
3482 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3483 GEN8_IRQ_INIT_NDX(DE_PIPE
, PIPE_B
, dev_priv
->de_irq_mask
[PIPE_B
],
3484 ~dev_priv
->de_irq_mask
[PIPE_B
]);
3485 GEN8_IRQ_INIT_NDX(DE_PIPE
, PIPE_C
, dev_priv
->de_irq_mask
[PIPE_C
],
3486 ~dev_priv
->de_irq_mask
[PIPE_C
]);
3487 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3490 static void cherryview_irq_preinstall(struct drm_device
*dev
)
3492 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3495 I915_WRITE(GEN8_MASTER_IRQ
, 0);
3496 POSTING_READ(GEN8_MASTER_IRQ
);
3498 gen8_gt_irq_reset(dev_priv
);
3500 GEN5_IRQ_RESET(GEN8_PCU_
);
3502 POSTING_READ(GEN8_PCU_IIR
);
3504 I915_WRITE(DPINVGTT
, DPINVGTT_STATUS_MASK_CHV
);
3506 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3507 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
3509 for_each_pipe(dev_priv
, pipe
)
3510 I915_WRITE(PIPESTAT(pipe
), 0xffff);
3512 I915_WRITE(VLV_IMR
, 0xffffffff);
3513 I915_WRITE(VLV_IER
, 0x0);
3514 I915_WRITE(VLV_IIR
, 0xffffffff);
3515 POSTING_READ(VLV_IIR
);
3518 static void ibx_hpd_irq_setup(struct drm_device
*dev
)
3520 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3521 struct intel_encoder
*intel_encoder
;
3522 u32 hotplug_irqs
, hotplug
, enabled_irqs
= 0;
3524 if (HAS_PCH_IBX(dev
)) {
3525 hotplug_irqs
= SDE_HOTPLUG_MASK
;
3526 for_each_intel_encoder(dev
, intel_encoder
)
3527 if (dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_ENABLED
)
3528 enabled_irqs
|= hpd_ibx
[intel_encoder
->hpd_pin
];
3530 hotplug_irqs
= SDE_HOTPLUG_MASK_CPT
;
3531 for_each_intel_encoder(dev
, intel_encoder
)
3532 if (dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_ENABLED
)
3533 enabled_irqs
|= hpd_cpt
[intel_encoder
->hpd_pin
];
3536 ibx_display_interrupt_update(dev_priv
, hotplug_irqs
, enabled_irqs
);
3539 * Enable digital hotplug on the PCH, and configure the DP short pulse
3540 * duration to 2ms (which is the minimum in the Display Port spec)
3542 * This register is the same on all known PCH chips.
3544 hotplug
= I915_READ(PCH_PORT_HOTPLUG
);
3545 hotplug
&= ~(PORTD_PULSE_DURATION_MASK
|PORTC_PULSE_DURATION_MASK
|PORTB_PULSE_DURATION_MASK
);
3546 hotplug
|= PORTD_HOTPLUG_ENABLE
| PORTD_PULSE_DURATION_2ms
;
3547 hotplug
|= PORTC_HOTPLUG_ENABLE
| PORTC_PULSE_DURATION_2ms
;
3548 hotplug
|= PORTB_HOTPLUG_ENABLE
| PORTB_PULSE_DURATION_2ms
;
3549 I915_WRITE(PCH_PORT_HOTPLUG
, hotplug
);
3552 static void ibx_irq_postinstall(struct drm_device
*dev
)
3554 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3557 if (HAS_PCH_NOP(dev
))
3560 if (HAS_PCH_IBX(dev
))
3561 mask
= SDE_GMBUS
| SDE_AUX_MASK
| SDE_POISON
;
3563 mask
= SDE_GMBUS_CPT
| SDE_AUX_MASK_CPT
;
3565 GEN5_ASSERT_IIR_IS_ZERO(SDEIIR
);
3566 I915_WRITE(SDEIMR
, ~mask
);
3569 static void gen5_gt_irq_postinstall(struct drm_device
*dev
)
3571 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3572 u32 pm_irqs
, gt_irqs
;
3574 pm_irqs
= gt_irqs
= 0;
3576 dev_priv
->gt_irq_mask
= ~0;
3577 if (HAS_L3_DPF(dev
)) {
3578 /* L3 parity interrupt is always unmasked. */
3579 dev_priv
->gt_irq_mask
= ~GT_PARITY_ERROR(dev
);
3580 gt_irqs
|= GT_PARITY_ERROR(dev
);
3583 gt_irqs
|= GT_RENDER_USER_INTERRUPT
;
3585 gt_irqs
|= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
|
3586 ILK_BSD_USER_INTERRUPT
;
3588 gt_irqs
|= GT_BLT_USER_INTERRUPT
| GT_BSD_USER_INTERRUPT
;
3591 GEN5_IRQ_INIT(GT
, dev_priv
->gt_irq_mask
, gt_irqs
);
3593 if (INTEL_INFO(dev
)->gen
>= 6) {
3594 pm_irqs
|= dev_priv
->pm_rps_events
;
3597 pm_irqs
|= PM_VEBOX_USER_INTERRUPT
;
3599 dev_priv
->pm_irq_mask
= 0xffffffff;
3600 GEN5_IRQ_INIT(GEN6_PM
, dev_priv
->pm_irq_mask
, pm_irqs
);
3604 static int ironlake_irq_postinstall(struct drm_device
*dev
)
3606 unsigned long irqflags
;
3607 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3608 u32 display_mask
, extra_mask
;
3610 if (INTEL_INFO(dev
)->gen
>= 7) {
3611 display_mask
= (DE_MASTER_IRQ_CONTROL
| DE_GSE_IVB
|
3612 DE_PCH_EVENT_IVB
| DE_PLANEC_FLIP_DONE_IVB
|
3613 DE_PLANEB_FLIP_DONE_IVB
|
3614 DE_PLANEA_FLIP_DONE_IVB
| DE_AUX_CHANNEL_A_IVB
);
3615 extra_mask
= (DE_PIPEC_VBLANK_IVB
| DE_PIPEB_VBLANK_IVB
|
3616 DE_PIPEA_VBLANK_IVB
| DE_ERR_INT_IVB
);
3618 display_mask
= (DE_MASTER_IRQ_CONTROL
| DE_GSE
| DE_PCH_EVENT
|
3619 DE_PLANEA_FLIP_DONE
| DE_PLANEB_FLIP_DONE
|
3621 DE_PIPEB_CRC_DONE
| DE_PIPEA_CRC_DONE
|
3623 extra_mask
= DE_PIPEA_VBLANK
| DE_PIPEB_VBLANK
| DE_PCU_EVENT
|
3624 DE_PIPEB_FIFO_UNDERRUN
| DE_PIPEA_FIFO_UNDERRUN
;
3627 dev_priv
->irq_mask
= ~display_mask
;
3629 I915_WRITE(HWSTAM
, 0xeffe);
3631 ibx_irq_pre_postinstall(dev
);
3633 GEN5_IRQ_INIT(DE
, dev_priv
->irq_mask
, display_mask
| extra_mask
);
3635 gen5_gt_irq_postinstall(dev
);
3637 ibx_irq_postinstall(dev
);
3639 if (IS_IRONLAKE_M(dev
)) {
3640 /* Enable PCU event interrupts
3642 * spinlocking not required here for correctness since interrupt
3643 * setup is guaranteed to run in single-threaded context. But we
3644 * need it to make the assert_spin_locked happy. */
3645 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3646 ironlake_enable_display_irq(dev_priv
, DE_PCU_EVENT
);
3647 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3653 static void valleyview_display_irqs_install(struct drm_i915_private
*dev_priv
)
3658 pipestat_mask
= PIPESTAT_INT_STATUS_MASK
|
3659 PIPE_FIFO_UNDERRUN_STATUS
;
3661 I915_WRITE(PIPESTAT(PIPE_A
), pipestat_mask
);
3662 I915_WRITE(PIPESTAT(PIPE_B
), pipestat_mask
);
3663 POSTING_READ(PIPESTAT(PIPE_A
));
3665 pipestat_mask
= PLANE_FLIP_DONE_INT_STATUS_VLV
|
3666 PIPE_CRC_DONE_INTERRUPT_STATUS
;
3668 i915_enable_pipestat(dev_priv
, PIPE_A
, pipestat_mask
|
3669 PIPE_GMBUS_INTERRUPT_STATUS
);
3670 i915_enable_pipestat(dev_priv
, PIPE_B
, pipestat_mask
);
3672 iir_mask
= I915_DISPLAY_PORT_INTERRUPT
|
3673 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3674 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
;
3675 dev_priv
->irq_mask
&= ~iir_mask
;
3677 I915_WRITE(VLV_IIR
, iir_mask
);
3678 I915_WRITE(VLV_IIR
, iir_mask
);
3679 I915_WRITE(VLV_IMR
, dev_priv
->irq_mask
);
3680 I915_WRITE(VLV_IER
, ~dev_priv
->irq_mask
);
3681 POSTING_READ(VLV_IER
);
3684 static void valleyview_display_irqs_uninstall(struct drm_i915_private
*dev_priv
)
3689 iir_mask
= I915_DISPLAY_PORT_INTERRUPT
|
3690 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3691 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
;
3693 dev_priv
->irq_mask
|= iir_mask
;
3694 I915_WRITE(VLV_IER
, ~dev_priv
->irq_mask
);
3695 I915_WRITE(VLV_IMR
, dev_priv
->irq_mask
);
3696 I915_WRITE(VLV_IIR
, iir_mask
);
3697 I915_WRITE(VLV_IIR
, iir_mask
);
3698 POSTING_READ(VLV_IIR
);
3700 pipestat_mask
= PLANE_FLIP_DONE_INT_STATUS_VLV
|
3701 PIPE_CRC_DONE_INTERRUPT_STATUS
;
3703 i915_disable_pipestat(dev_priv
, PIPE_A
, pipestat_mask
|
3704 PIPE_GMBUS_INTERRUPT_STATUS
);
3705 i915_disable_pipestat(dev_priv
, PIPE_B
, pipestat_mask
);
3707 pipestat_mask
= PIPESTAT_INT_STATUS_MASK
|
3708 PIPE_FIFO_UNDERRUN_STATUS
;
3709 I915_WRITE(PIPESTAT(PIPE_A
), pipestat_mask
);
3710 I915_WRITE(PIPESTAT(PIPE_B
), pipestat_mask
);
3711 POSTING_READ(PIPESTAT(PIPE_A
));
3714 void valleyview_enable_display_irqs(struct drm_i915_private
*dev_priv
)
3716 assert_spin_locked(&dev_priv
->irq_lock
);
3718 if (dev_priv
->display_irqs_enabled
)
3721 dev_priv
->display_irqs_enabled
= true;
3723 if (intel_irqs_enabled(dev_priv
))
3724 valleyview_display_irqs_install(dev_priv
);
3727 void valleyview_disable_display_irqs(struct drm_i915_private
*dev_priv
)
3729 assert_spin_locked(&dev_priv
->irq_lock
);
3731 if (!dev_priv
->display_irqs_enabled
)
3734 dev_priv
->display_irqs_enabled
= false;
3736 if (intel_irqs_enabled(dev_priv
))
3737 valleyview_display_irqs_uninstall(dev_priv
);
3740 static int valleyview_irq_postinstall(struct drm_device
*dev
)
3742 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3743 unsigned long irqflags
;
3745 dev_priv
->irq_mask
= ~0;
3747 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3748 POSTING_READ(PORT_HOTPLUG_EN
);
3750 I915_WRITE(VLV_IMR
, dev_priv
->irq_mask
);
3751 I915_WRITE(VLV_IER
, ~dev_priv
->irq_mask
);
3752 I915_WRITE(VLV_IIR
, 0xffffffff);
3753 POSTING_READ(VLV_IER
);
3755 /* Interrupt setup is already guaranteed to be single-threaded, this is
3756 * just to make the assert_spin_locked check happy. */
3757 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3758 if (dev_priv
->display_irqs_enabled
)
3759 valleyview_display_irqs_install(dev_priv
);
3760 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3762 I915_WRITE(VLV_IIR
, 0xffffffff);
3763 I915_WRITE(VLV_IIR
, 0xffffffff);
3765 gen5_gt_irq_postinstall(dev
);
3767 /* ack & enable invalid PTE error interrupts */
3768 #if 0 /* FIXME: add support to irq handler for checking these bits */
3769 I915_WRITE(DPINVGTT
, DPINVGTT_STATUS_MASK
);
3770 I915_WRITE(DPINVGTT
, DPINVGTT_EN_MASK
);
3773 I915_WRITE(VLV_MASTER_IER
, MASTER_INTERRUPT_ENABLE
);
3778 static void gen8_gt_irq_postinstall(struct drm_i915_private
*dev_priv
)
3780 /* These are interrupts we'll toggle with the ring mask register */
3781 uint32_t gt_interrupts
[] = {
3782 GT_RENDER_USER_INTERRUPT
<< GEN8_RCS_IRQ_SHIFT
|
3783 GT_CONTEXT_SWITCH_INTERRUPT
<< GEN8_RCS_IRQ_SHIFT
|
3784 GT_RENDER_L3_PARITY_ERROR_INTERRUPT
|
3785 GT_RENDER_USER_INTERRUPT
<< GEN8_BCS_IRQ_SHIFT
|
3786 GT_CONTEXT_SWITCH_INTERRUPT
<< GEN8_BCS_IRQ_SHIFT
,
3787 GT_RENDER_USER_INTERRUPT
<< GEN8_VCS1_IRQ_SHIFT
|
3788 GT_CONTEXT_SWITCH_INTERRUPT
<< GEN8_VCS1_IRQ_SHIFT
|
3789 GT_RENDER_USER_INTERRUPT
<< GEN8_VCS2_IRQ_SHIFT
|
3790 GT_CONTEXT_SWITCH_INTERRUPT
<< GEN8_VCS2_IRQ_SHIFT
,
3792 GT_RENDER_USER_INTERRUPT
<< GEN8_VECS_IRQ_SHIFT
|
3793 GT_CONTEXT_SWITCH_INTERRUPT
<< GEN8_VECS_IRQ_SHIFT
3796 dev_priv
->pm_irq_mask
= 0xffffffff;
3797 GEN8_IRQ_INIT_NDX(GT
, 0, ~gt_interrupts
[0], gt_interrupts
[0]);
3798 GEN8_IRQ_INIT_NDX(GT
, 1, ~gt_interrupts
[1], gt_interrupts
[1]);
3799 GEN8_IRQ_INIT_NDX(GT
, 2, dev_priv
->pm_irq_mask
, dev_priv
->pm_rps_events
);
3800 GEN8_IRQ_INIT_NDX(GT
, 3, ~gt_interrupts
[3], gt_interrupts
[3]);
3803 static void gen8_de_irq_postinstall(struct drm_i915_private
*dev_priv
)
3805 uint32_t de_pipe_masked
= GEN8_PIPE_PRIMARY_FLIP_DONE
|
3806 GEN8_PIPE_CDCLK_CRC_DONE
|
3807 GEN8_DE_PIPE_IRQ_FAULT_ERRORS
;
3808 uint32_t de_pipe_enables
= de_pipe_masked
| GEN8_PIPE_VBLANK
|
3809 GEN8_PIPE_FIFO_UNDERRUN
;
3811 dev_priv
->de_irq_mask
[PIPE_A
] = ~de_pipe_masked
;
3812 dev_priv
->de_irq_mask
[PIPE_B
] = ~de_pipe_masked
;
3813 dev_priv
->de_irq_mask
[PIPE_C
] = ~de_pipe_masked
;
3815 for_each_pipe(dev_priv
, pipe
)
3816 if (intel_display_power_enabled(dev_priv
,
3817 POWER_DOMAIN_PIPE(pipe
)))
3818 GEN8_IRQ_INIT_NDX(DE_PIPE
, pipe
,
3819 dev_priv
->de_irq_mask
[pipe
],
3822 GEN5_IRQ_INIT(GEN8_DE_PORT_
, ~GEN8_AUX_CHANNEL_A
, GEN8_AUX_CHANNEL_A
);
3825 static int gen8_irq_postinstall(struct drm_device
*dev
)
3827 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3829 ibx_irq_pre_postinstall(dev
);
3831 gen8_gt_irq_postinstall(dev_priv
);
3832 gen8_de_irq_postinstall(dev_priv
);
3834 ibx_irq_postinstall(dev
);
3836 I915_WRITE(GEN8_MASTER_IRQ
, DE_MASTER_IRQ_CONTROL
);
3837 POSTING_READ(GEN8_MASTER_IRQ
);
3842 static int cherryview_irq_postinstall(struct drm_device
*dev
)
3844 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3845 u32 enable_mask
= I915_DISPLAY_PORT_INTERRUPT
|
3846 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3847 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
3848 I915_DISPLAY_PIPE_C_EVENT_INTERRUPT
;
3849 u32 pipestat_enable
= PLANE_FLIP_DONE_INT_STATUS_VLV
|
3850 PIPE_CRC_DONE_INTERRUPT_STATUS
;
3851 unsigned long irqflags
;
3855 * Leave vblank interrupts masked initially. enable/disable will
3856 * toggle them based on usage.
3858 dev_priv
->irq_mask
= ~enable_mask
;
3860 for_each_pipe(dev_priv
, pipe
)
3861 I915_WRITE(PIPESTAT(pipe
), 0xffff);
3863 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3864 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_GMBUS_INTERRUPT_STATUS
);
3865 for_each_pipe(dev_priv
, pipe
)
3866 i915_enable_pipestat(dev_priv
, pipe
, pipestat_enable
);
3867 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3869 I915_WRITE(VLV_IIR
, 0xffffffff);
3870 I915_WRITE(VLV_IMR
, dev_priv
->irq_mask
);
3871 I915_WRITE(VLV_IER
, enable_mask
);
3873 gen8_gt_irq_postinstall(dev_priv
);
3875 I915_WRITE(GEN8_MASTER_IRQ
, MASTER_INTERRUPT_ENABLE
);
3876 POSTING_READ(GEN8_MASTER_IRQ
);
3881 static void gen8_irq_uninstall(struct drm_device
*dev
)
3883 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3888 gen8_irq_reset(dev
);
3891 static void valleyview_irq_uninstall(struct drm_device
*dev
)
3893 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3894 unsigned long irqflags
;
3900 I915_WRITE(VLV_MASTER_IER
, 0);
3902 for_each_pipe(dev_priv
, pipe
)
3903 I915_WRITE(PIPESTAT(pipe
), 0xffff);
3905 I915_WRITE(HWSTAM
, 0xffffffff);
3906 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3907 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
3909 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3910 if (dev_priv
->display_irqs_enabled
)
3911 valleyview_display_irqs_uninstall(dev_priv
);
3912 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3914 dev_priv
->irq_mask
= 0;
3916 I915_WRITE(VLV_IIR
, 0xffffffff);
3917 I915_WRITE(VLV_IMR
, 0xffffffff);
3918 I915_WRITE(VLV_IER
, 0x0);
3919 POSTING_READ(VLV_IER
);
3922 static void cherryview_irq_uninstall(struct drm_device
*dev
)
3924 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3930 I915_WRITE(GEN8_MASTER_IRQ
, 0);
3931 POSTING_READ(GEN8_MASTER_IRQ
);
3933 #define GEN8_IRQ_FINI_NDX(type, which) \
3935 I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
3936 I915_WRITE(GEN8_##type##_IER(which), 0); \
3937 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
3938 POSTING_READ(GEN8_##type##_IIR(which)); \
3939 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
3942 #define GEN8_IRQ_FINI(type) \
3944 I915_WRITE(GEN8_##type##_IMR, 0xffffffff); \
3945 I915_WRITE(GEN8_##type##_IER, 0); \
3946 I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \
3947 POSTING_READ(GEN8_##type##_IIR); \
3948 I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \
3951 GEN8_IRQ_FINI_NDX(GT
, 0);
3952 GEN8_IRQ_FINI_NDX(GT
, 1);
3953 GEN8_IRQ_FINI_NDX(GT
, 2);
3954 GEN8_IRQ_FINI_NDX(GT
, 3);
3958 #undef GEN8_IRQ_FINI
3959 #undef GEN8_IRQ_FINI_NDX
3961 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3962 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
3964 for_each_pipe(dev_priv
, pipe
)
3965 I915_WRITE(PIPESTAT(pipe
), 0xffff);
3967 I915_WRITE(VLV_IMR
, 0xffffffff);
3968 I915_WRITE(VLV_IER
, 0x0);
3969 I915_WRITE(VLV_IIR
, 0xffffffff);
3970 POSTING_READ(VLV_IIR
);
3973 static void ironlake_irq_uninstall(struct drm_device
*dev
)
3975 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3980 ironlake_irq_reset(dev
);
3983 static void i8xx_irq_preinstall(struct drm_device
* dev
)
3985 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3988 for_each_pipe(dev_priv
, pipe
)
3989 I915_WRITE(PIPESTAT(pipe
), 0);
3990 I915_WRITE16(IMR
, 0xffff);
3991 I915_WRITE16(IER
, 0x0);
3992 POSTING_READ16(IER
);
3995 static int i8xx_irq_postinstall(struct drm_device
*dev
)
3997 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3998 unsigned long irqflags
;
4001 ~(I915_ERROR_PAGE_TABLE
| I915_ERROR_MEMORY_REFRESH
));
4003 /* Unmask the interrupts that we always want on. */
4004 dev_priv
->irq_mask
=
4005 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
4006 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
4007 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4008 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
|
4009 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
4010 I915_WRITE16(IMR
, dev_priv
->irq_mask
);
4013 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
4014 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
4015 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
|
4016 I915_USER_INTERRUPT
);
4017 POSTING_READ16(IER
);
4019 /* Interrupt setup is already guaranteed to be single-threaded, this is
4020 * just to make the assert_spin_locked check happy. */
4021 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
4022 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
4023 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
4024 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
4030 * Returns true when a page flip has completed.
4032 static bool i8xx_handle_vblank(struct drm_device
*dev
,
4033 int plane
, int pipe
, u32 iir
)
4035 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4036 u16 flip_pending
= DISPLAY_PLANE_FLIP_PENDING(plane
);
4038 if (!intel_pipe_handle_vblank(dev
, pipe
))
4041 if ((iir
& flip_pending
) == 0)
4042 goto check_page_flip
;
4044 intel_prepare_page_flip(dev
, plane
);
4046 /* We detect FlipDone by looking for the change in PendingFlip from '1'
4047 * to '0' on the following vblank, i.e. IIR has the Pendingflip
4048 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
4049 * the flip is completed (no longer pending). Since this doesn't raise
4050 * an interrupt per se, we watch for the change at vblank.
4052 if (I915_READ16(ISR
) & flip_pending
)
4053 goto check_page_flip
;
4055 intel_finish_page_flip(dev
, pipe
);
4059 intel_check_page_flip(dev
, pipe
);
4063 static irqreturn_t
i8xx_irq_handler(int irq
, void *arg
)
4065 struct drm_device
*dev
= arg
;
4066 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4069 unsigned long irqflags
;
4072 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4073 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
4075 iir
= I915_READ16(IIR
);
4079 while (iir
& ~flip_mask
) {
4080 /* Can't rely on pipestat interrupt bit in iir as it might
4081 * have been cleared after the pipestat interrupt was received.
4082 * It doesn't set the bit in iir again, but it still produces
4083 * interrupts (for non-MSI).
4085 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
4086 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
4087 i915_handle_error(dev
, false,
4088 "Command parser error, iir 0x%08x",
4091 for_each_pipe(dev_priv
, pipe
) {
4092 int reg
= PIPESTAT(pipe
);
4093 pipe_stats
[pipe
] = I915_READ(reg
);
4096 * Clear the PIPE*STAT regs before the IIR
4098 if (pipe_stats
[pipe
] & 0x8000ffff)
4099 I915_WRITE(reg
, pipe_stats
[pipe
]);
4101 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
4103 I915_WRITE16(IIR
, iir
& ~flip_mask
);
4104 new_iir
= I915_READ16(IIR
); /* Flush posted writes */
4106 i915_update_dri1_breadcrumb(dev
);
4108 if (iir
& I915_USER_INTERRUPT
)
4109 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
4111 for_each_pipe(dev_priv
, pipe
) {
4116 if (pipe_stats
[pipe
] & PIPE_VBLANK_INTERRUPT_STATUS
&&
4117 i8xx_handle_vblank(dev
, plane
, pipe
, iir
))
4118 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(plane
);
4120 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
4121 i9xx_pipe_crc_irq_handler(dev
, pipe
);
4123 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
&&
4124 intel_set_cpu_fifo_underrun_reporting(dev
, pipe
, false))
4125 DRM_ERROR("pipe %c underrun\n", pipe_name(pipe
));
4134 static void i8xx_irq_uninstall(struct drm_device
* dev
)
4136 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4139 for_each_pipe(dev_priv
, pipe
) {
4140 /* Clear enable bits; then clear status bits */
4141 I915_WRITE(PIPESTAT(pipe
), 0);
4142 I915_WRITE(PIPESTAT(pipe
), I915_READ(PIPESTAT(pipe
)));
4144 I915_WRITE16(IMR
, 0xffff);
4145 I915_WRITE16(IER
, 0x0);
4146 I915_WRITE16(IIR
, I915_READ16(IIR
));
4149 static void i915_irq_preinstall(struct drm_device
* dev
)
4151 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4154 if (I915_HAS_HOTPLUG(dev
)) {
4155 I915_WRITE(PORT_HOTPLUG_EN
, 0);
4156 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
4159 I915_WRITE16(HWSTAM
, 0xeffe);
4160 for_each_pipe(dev_priv
, pipe
)
4161 I915_WRITE(PIPESTAT(pipe
), 0);
4162 I915_WRITE(IMR
, 0xffffffff);
4163 I915_WRITE(IER
, 0x0);
4167 static int i915_irq_postinstall(struct drm_device
*dev
)
4169 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4171 unsigned long irqflags
;
4173 I915_WRITE(EMR
, ~(I915_ERROR_PAGE_TABLE
| I915_ERROR_MEMORY_REFRESH
));
4175 /* Unmask the interrupts that we always want on. */
4176 dev_priv
->irq_mask
=
4177 ~(I915_ASLE_INTERRUPT
|
4178 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
4179 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
4180 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4181 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
|
4182 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
4185 I915_ASLE_INTERRUPT
|
4186 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
4187 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
4188 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
|
4189 I915_USER_INTERRUPT
;
4191 if (I915_HAS_HOTPLUG(dev
)) {
4192 I915_WRITE(PORT_HOTPLUG_EN
, 0);
4193 POSTING_READ(PORT_HOTPLUG_EN
);
4195 /* Enable in IER... */
4196 enable_mask
|= I915_DISPLAY_PORT_INTERRUPT
;
4197 /* and unmask in IMR */
4198 dev_priv
->irq_mask
&= ~I915_DISPLAY_PORT_INTERRUPT
;
4201 I915_WRITE(IMR
, dev_priv
->irq_mask
);
4202 I915_WRITE(IER
, enable_mask
);
4205 i915_enable_asle_pipestat(dev
);
4207 /* Interrupt setup is already guaranteed to be single-threaded, this is
4208 * just to make the assert_spin_locked check happy. */
4209 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
4210 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
4211 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
4212 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
4218 * Returns true when a page flip has completed.
4220 static bool i915_handle_vblank(struct drm_device
*dev
,
4221 int plane
, int pipe
, u32 iir
)
4223 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4224 u32 flip_pending
= DISPLAY_PLANE_FLIP_PENDING(plane
);
4226 if (!intel_pipe_handle_vblank(dev
, pipe
))
4229 if ((iir
& flip_pending
) == 0)
4230 goto check_page_flip
;
4232 intel_prepare_page_flip(dev
, plane
);
4234 /* We detect FlipDone by looking for the change in PendingFlip from '1'
4235 * to '0' on the following vblank, i.e. IIR has the Pendingflip
4236 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
4237 * the flip is completed (no longer pending). Since this doesn't raise
4238 * an interrupt per se, we watch for the change at vblank.
4240 if (I915_READ(ISR
) & flip_pending
)
4241 goto check_page_flip
;
4243 intel_finish_page_flip(dev
, pipe
);
4247 intel_check_page_flip(dev
, pipe
);
4251 static irqreturn_t
i915_irq_handler(int irq
, void *arg
)
4253 struct drm_device
*dev
= arg
;
4254 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4255 u32 iir
, new_iir
, pipe_stats
[I915_MAX_PIPES
];
4256 unsigned long irqflags
;
4258 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4259 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
4260 int pipe
, ret
= IRQ_NONE
;
4262 iir
= I915_READ(IIR
);
4264 bool irq_received
= (iir
& ~flip_mask
) != 0;
4265 bool blc_event
= false;
4267 /* Can't rely on pipestat interrupt bit in iir as it might
4268 * have been cleared after the pipestat interrupt was received.
4269 * It doesn't set the bit in iir again, but it still produces
4270 * interrupts (for non-MSI).
4272 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
4273 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
4274 i915_handle_error(dev
, false,
4275 "Command parser error, iir 0x%08x",
4278 for_each_pipe(dev_priv
, pipe
) {
4279 int reg
= PIPESTAT(pipe
);
4280 pipe_stats
[pipe
] = I915_READ(reg
);
4282 /* Clear the PIPE*STAT regs before the IIR */
4283 if (pipe_stats
[pipe
] & 0x8000ffff) {
4284 I915_WRITE(reg
, pipe_stats
[pipe
]);
4285 irq_received
= true;
4288 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
4293 /* Consume port. Then clear IIR or we'll miss events */
4294 if (I915_HAS_HOTPLUG(dev
) &&
4295 iir
& I915_DISPLAY_PORT_INTERRUPT
)
4296 i9xx_hpd_irq_handler(dev
);
4298 I915_WRITE(IIR
, iir
& ~flip_mask
);
4299 new_iir
= I915_READ(IIR
); /* Flush posted writes */
4301 if (iir
& I915_USER_INTERRUPT
)
4302 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
4304 for_each_pipe(dev_priv
, pipe
) {
4309 if (pipe_stats
[pipe
] & PIPE_VBLANK_INTERRUPT_STATUS
&&
4310 i915_handle_vblank(dev
, plane
, pipe
, iir
))
4311 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(plane
);
4313 if (pipe_stats
[pipe
] & PIPE_LEGACY_BLC_EVENT_STATUS
)
4316 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
4317 i9xx_pipe_crc_irq_handler(dev
, pipe
);
4319 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
&&
4320 intel_set_cpu_fifo_underrun_reporting(dev
, pipe
, false))
4321 DRM_ERROR("pipe %c underrun\n", pipe_name(pipe
));
4324 if (blc_event
|| (iir
& I915_ASLE_INTERRUPT
))
4325 intel_opregion_asle_intr(dev
);
4327 /* With MSI, interrupts are only generated when iir
4328 * transitions from zero to nonzero. If another bit got
4329 * set while we were handling the existing iir bits, then
4330 * we would never get another interrupt.
4332 * This is fine on non-MSI as well, as if we hit this path
4333 * we avoid exiting the interrupt handler only to generate
4336 * Note that for MSI this could cause a stray interrupt report
4337 * if an interrupt landed in the time between writing IIR and
4338 * the posting read. This should be rare enough to never
4339 * trigger the 99% of 100,000 interrupts test for disabling
4344 } while (iir
& ~flip_mask
);
4346 i915_update_dri1_breadcrumb(dev
);
4351 static void i915_irq_uninstall(struct drm_device
* dev
)
4353 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4356 if (I915_HAS_HOTPLUG(dev
)) {
4357 I915_WRITE(PORT_HOTPLUG_EN
, 0);
4358 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
4361 I915_WRITE16(HWSTAM
, 0xffff);
4362 for_each_pipe(dev_priv
, pipe
) {
4363 /* Clear enable bits; then clear status bits */
4364 I915_WRITE(PIPESTAT(pipe
), 0);
4365 I915_WRITE(PIPESTAT(pipe
), I915_READ(PIPESTAT(pipe
)));
4367 I915_WRITE(IMR
, 0xffffffff);
4368 I915_WRITE(IER
, 0x0);
4370 I915_WRITE(IIR
, I915_READ(IIR
));
4373 static void i965_irq_preinstall(struct drm_device
* dev
)
4375 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4378 I915_WRITE(PORT_HOTPLUG_EN
, 0);
4379 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
4381 I915_WRITE(HWSTAM
, 0xeffe);
4382 for_each_pipe(dev_priv
, pipe
)
4383 I915_WRITE(PIPESTAT(pipe
), 0);
4384 I915_WRITE(IMR
, 0xffffffff);
4385 I915_WRITE(IER
, 0x0);
4389 static int i965_irq_postinstall(struct drm_device
*dev
)
4391 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4394 unsigned long irqflags
;
4396 /* Unmask the interrupts that we always want on. */
4397 dev_priv
->irq_mask
= ~(I915_ASLE_INTERRUPT
|
4398 I915_DISPLAY_PORT_INTERRUPT
|
4399 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
4400 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
4401 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4402 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
|
4403 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
4405 enable_mask
= ~dev_priv
->irq_mask
;
4406 enable_mask
&= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4407 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
);
4408 enable_mask
|= I915_USER_INTERRUPT
;
4411 enable_mask
|= I915_BSD_USER_INTERRUPT
;
4413 /* Interrupt setup is already guaranteed to be single-threaded, this is
4414 * just to make the assert_spin_locked check happy. */
4415 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
4416 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_GMBUS_INTERRUPT_STATUS
);
4417 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
4418 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
4419 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
4422 * Enable some error detection, note the instruction error mask
4423 * bit is reserved, so we leave it masked.
4426 error_mask
= ~(GM45_ERROR_PAGE_TABLE
|
4427 GM45_ERROR_MEM_PRIV
|
4428 GM45_ERROR_CP_PRIV
|
4429 I915_ERROR_MEMORY_REFRESH
);
4431 error_mask
= ~(I915_ERROR_PAGE_TABLE
|
4432 I915_ERROR_MEMORY_REFRESH
);
4434 I915_WRITE(EMR
, error_mask
);
4436 I915_WRITE(IMR
, dev_priv
->irq_mask
);
4437 I915_WRITE(IER
, enable_mask
);
4440 I915_WRITE(PORT_HOTPLUG_EN
, 0);
4441 POSTING_READ(PORT_HOTPLUG_EN
);
4443 i915_enable_asle_pipestat(dev
);
4448 static void i915_hpd_irq_setup(struct drm_device
*dev
)
4450 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4451 struct intel_encoder
*intel_encoder
;
4454 assert_spin_locked(&dev_priv
->irq_lock
);
4456 if (I915_HAS_HOTPLUG(dev
)) {
4457 hotplug_en
= I915_READ(PORT_HOTPLUG_EN
);
4458 hotplug_en
&= ~HOTPLUG_INT_EN_MASK
;
4459 /* Note HDMI and DP share hotplug bits */
4460 /* enable bits are the same for all generations */
4461 for_each_intel_encoder(dev
, intel_encoder
)
4462 if (dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_ENABLED
)
4463 hotplug_en
|= hpd_mask_i915
[intel_encoder
->hpd_pin
];
4464 /* Programming the CRT detection parameters tends
4465 to generate a spurious hotplug event about three
4466 seconds later. So just do it once.
4469 hotplug_en
|= CRT_HOTPLUG_ACTIVATION_PERIOD_64
;
4470 hotplug_en
&= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK
;
4471 hotplug_en
|= CRT_HOTPLUG_VOLTAGE_COMPARE_50
;
4473 /* Ignore TV since it's buggy */
4474 I915_WRITE(PORT_HOTPLUG_EN
, hotplug_en
);
4478 static irqreturn_t
i965_irq_handler(int irq
, void *arg
)
4480 struct drm_device
*dev
= arg
;
4481 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4483 u32 pipe_stats
[I915_MAX_PIPES
];
4484 unsigned long irqflags
;
4485 int ret
= IRQ_NONE
, pipe
;
4487 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4488 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
4490 iir
= I915_READ(IIR
);
4493 bool irq_received
= (iir
& ~flip_mask
) != 0;
4494 bool blc_event
= false;
4496 /* Can't rely on pipestat interrupt bit in iir as it might
4497 * have been cleared after the pipestat interrupt was received.
4498 * It doesn't set the bit in iir again, but it still produces
4499 * interrupts (for non-MSI).
4501 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
4502 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
4503 i915_handle_error(dev
, false,
4504 "Command parser error, iir 0x%08x",
4507 for_each_pipe(dev_priv
, pipe
) {
4508 int reg
= PIPESTAT(pipe
);
4509 pipe_stats
[pipe
] = I915_READ(reg
);
4512 * Clear the PIPE*STAT regs before the IIR
4514 if (pipe_stats
[pipe
] & 0x8000ffff) {
4515 I915_WRITE(reg
, pipe_stats
[pipe
]);
4516 irq_received
= true;
4519 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
4526 /* Consume port. Then clear IIR or we'll miss events */
4527 if (iir
& I915_DISPLAY_PORT_INTERRUPT
)
4528 i9xx_hpd_irq_handler(dev
);
4530 I915_WRITE(IIR
, iir
& ~flip_mask
);
4531 new_iir
= I915_READ(IIR
); /* Flush posted writes */
4533 if (iir
& I915_USER_INTERRUPT
)
4534 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
4535 if (iir
& I915_BSD_USER_INTERRUPT
)
4536 notify_ring(dev
, &dev_priv
->ring
[VCS
]);
4538 for_each_pipe(dev_priv
, pipe
) {
4539 if (pipe_stats
[pipe
] & PIPE_START_VBLANK_INTERRUPT_STATUS
&&
4540 i915_handle_vblank(dev
, pipe
, pipe
, iir
))
4541 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(pipe
);
4543 if (pipe_stats
[pipe
] & PIPE_LEGACY_BLC_EVENT_STATUS
)
4546 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
4547 i9xx_pipe_crc_irq_handler(dev
, pipe
);
4549 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
&&
4550 intel_set_cpu_fifo_underrun_reporting(dev
, pipe
, false))
4551 DRM_ERROR("pipe %c underrun\n", pipe_name(pipe
));
4554 if (blc_event
|| (iir
& I915_ASLE_INTERRUPT
))
4555 intel_opregion_asle_intr(dev
);
4557 if (pipe_stats
[0] & PIPE_GMBUS_INTERRUPT_STATUS
)
4558 gmbus_irq_handler(dev
);
4560 /* With MSI, interrupts are only generated when iir
4561 * transitions from zero to nonzero. If another bit got
4562 * set while we were handling the existing iir bits, then
4563 * we would never get another interrupt.
4565 * This is fine on non-MSI as well, as if we hit this path
4566 * we avoid exiting the interrupt handler only to generate
4569 * Note that for MSI this could cause a stray interrupt report
4570 * if an interrupt landed in the time between writing IIR and
4571 * the posting read. This should be rare enough to never
4572 * trigger the 99% of 100,000 interrupts test for disabling
4578 i915_update_dri1_breadcrumb(dev
);
4583 static void i965_irq_uninstall(struct drm_device
* dev
)
4585 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4591 I915_WRITE(PORT_HOTPLUG_EN
, 0);
4592 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
4594 I915_WRITE(HWSTAM
, 0xffffffff);
4595 for_each_pipe(dev_priv
, pipe
)
4596 I915_WRITE(PIPESTAT(pipe
), 0);
4597 I915_WRITE(IMR
, 0xffffffff);
4598 I915_WRITE(IER
, 0x0);
4600 for_each_pipe(dev_priv
, pipe
)
4601 I915_WRITE(PIPESTAT(pipe
),
4602 I915_READ(PIPESTAT(pipe
)) & 0x8000ffff);
4603 I915_WRITE(IIR
, I915_READ(IIR
));
4606 static void intel_hpd_irq_reenable_work(struct work_struct
*work
)
4608 struct drm_i915_private
*dev_priv
=
4609 container_of(work
, typeof(*dev_priv
),
4610 hotplug_reenable_work
.work
);
4611 struct drm_device
*dev
= dev_priv
->dev
;
4612 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
4615 intel_runtime_pm_get(dev_priv
);
4617 spin_lock_irq(&dev_priv
->irq_lock
);
4618 for (i
= (HPD_NONE
+ 1); i
< HPD_NUM_PINS
; i
++) {
4619 struct drm_connector
*connector
;
4621 if (dev_priv
->hpd_stats
[i
].hpd_mark
!= HPD_DISABLED
)
4624 dev_priv
->hpd_stats
[i
].hpd_mark
= HPD_ENABLED
;
4626 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
4627 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
4629 if (intel_connector
->encoder
->hpd_pin
== i
) {
4630 if (connector
->polled
!= intel_connector
->polled
)
4631 DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
4633 connector
->polled
= intel_connector
->polled
;
4634 if (!connector
->polled
)
4635 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
4639 if (dev_priv
->display
.hpd_irq_setup
)
4640 dev_priv
->display
.hpd_irq_setup(dev
);
4641 spin_unlock_irq(&dev_priv
->irq_lock
);
4643 intel_runtime_pm_put(dev_priv
);
4646 void intel_irq_init(struct drm_device
*dev
)
4648 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4650 INIT_WORK(&dev_priv
->hotplug_work
, i915_hotplug_work_func
);
4651 INIT_WORK(&dev_priv
->dig_port_work
, i915_digport_work_func
);
4652 INIT_WORK(&dev_priv
->gpu_error
.work
, i915_error_work_func
);
4653 INIT_WORK(&dev_priv
->rps
.work
, gen6_pm_rps_work
);
4654 INIT_WORK(&dev_priv
->l3_parity
.error_work
, ivybridge_parity_work
);
4656 /* Let's track the enabled rps events */
4657 if (IS_VALLEYVIEW(dev
) && !IS_CHERRYVIEW(dev
))
4658 /* WaGsvRC0ResidencyMethod:vlv */
4659 dev_priv
->pm_rps_events
= GEN6_PM_RP_UP_EI_EXPIRED
;
4661 dev_priv
->pm_rps_events
= GEN6_PM_RPS_EVENTS
;
4663 setup_timer(&dev_priv
->gpu_error
.hangcheck_timer
,
4664 i915_hangcheck_elapsed
,
4665 (unsigned long) dev
);
4666 INIT_DELAYED_WORK(&dev_priv
->hotplug_reenable_work
,
4667 intel_hpd_irq_reenable_work
);
4669 pm_qos_add_request(&dev_priv
->pm_qos
, PM_QOS_CPU_DMA_LATENCY
, PM_QOS_DEFAULT_VALUE
);
4671 /* Haven't installed the IRQ handler yet */
4672 dev_priv
->pm
._irqs_disabled
= true;
4675 dev
->max_vblank_count
= 0;
4676 dev
->driver
->get_vblank_counter
= i8xx_get_vblank_counter
;
4677 } else if (IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
4678 dev
->max_vblank_count
= 0xffffffff; /* full 32 bit counter */
4679 dev
->driver
->get_vblank_counter
= gm45_get_vblank_counter
;
4681 dev
->driver
->get_vblank_counter
= i915_get_vblank_counter
;
4682 dev
->max_vblank_count
= 0xffffff; /* only 24 bits of frame count */
4686 * Opt out of the vblank disable timer on everything except gen2.
4687 * Gen2 doesn't have a hardware frame counter and so depends on
4688 * vblank interrupts to produce sane vblank seuquence numbers.
4691 dev
->vblank_disable_immediate
= true;
4693 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
4694 dev
->driver
->get_vblank_timestamp
= i915_get_vblank_timestamp
;
4695 dev
->driver
->get_scanout_position
= i915_get_crtc_scanoutpos
;
4698 if (IS_CHERRYVIEW(dev
)) {
4699 dev
->driver
->irq_handler
= cherryview_irq_handler
;
4700 dev
->driver
->irq_preinstall
= cherryview_irq_preinstall
;
4701 dev
->driver
->irq_postinstall
= cherryview_irq_postinstall
;
4702 dev
->driver
->irq_uninstall
= cherryview_irq_uninstall
;
4703 dev
->driver
->enable_vblank
= valleyview_enable_vblank
;
4704 dev
->driver
->disable_vblank
= valleyview_disable_vblank
;
4705 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
4706 } else if (IS_VALLEYVIEW(dev
)) {
4707 dev
->driver
->irq_handler
= valleyview_irq_handler
;
4708 dev
->driver
->irq_preinstall
= valleyview_irq_preinstall
;
4709 dev
->driver
->irq_postinstall
= valleyview_irq_postinstall
;
4710 dev
->driver
->irq_uninstall
= valleyview_irq_uninstall
;
4711 dev
->driver
->enable_vblank
= valleyview_enable_vblank
;
4712 dev
->driver
->disable_vblank
= valleyview_disable_vblank
;
4713 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
4714 } else if (IS_GEN8(dev
)) {
4715 dev
->driver
->irq_handler
= gen8_irq_handler
;
4716 dev
->driver
->irq_preinstall
= gen8_irq_reset
;
4717 dev
->driver
->irq_postinstall
= gen8_irq_postinstall
;
4718 dev
->driver
->irq_uninstall
= gen8_irq_uninstall
;
4719 dev
->driver
->enable_vblank
= gen8_enable_vblank
;
4720 dev
->driver
->disable_vblank
= gen8_disable_vblank
;
4721 dev_priv
->display
.hpd_irq_setup
= ibx_hpd_irq_setup
;
4722 } else if (HAS_PCH_SPLIT(dev
)) {
4723 dev
->driver
->irq_handler
= ironlake_irq_handler
;
4724 dev
->driver
->irq_preinstall
= ironlake_irq_reset
;
4725 dev
->driver
->irq_postinstall
= ironlake_irq_postinstall
;
4726 dev
->driver
->irq_uninstall
= ironlake_irq_uninstall
;
4727 dev
->driver
->enable_vblank
= ironlake_enable_vblank
;
4728 dev
->driver
->disable_vblank
= ironlake_disable_vblank
;
4729 dev_priv
->display
.hpd_irq_setup
= ibx_hpd_irq_setup
;
4731 if (INTEL_INFO(dev
)->gen
== 2) {
4732 dev
->driver
->irq_preinstall
= i8xx_irq_preinstall
;
4733 dev
->driver
->irq_postinstall
= i8xx_irq_postinstall
;
4734 dev
->driver
->irq_handler
= i8xx_irq_handler
;
4735 dev
->driver
->irq_uninstall
= i8xx_irq_uninstall
;
4736 } else if (INTEL_INFO(dev
)->gen
== 3) {
4737 dev
->driver
->irq_preinstall
= i915_irq_preinstall
;
4738 dev
->driver
->irq_postinstall
= i915_irq_postinstall
;
4739 dev
->driver
->irq_uninstall
= i915_irq_uninstall
;
4740 dev
->driver
->irq_handler
= i915_irq_handler
;
4741 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
4743 dev
->driver
->irq_preinstall
= i965_irq_preinstall
;
4744 dev
->driver
->irq_postinstall
= i965_irq_postinstall
;
4745 dev
->driver
->irq_uninstall
= i965_irq_uninstall
;
4746 dev
->driver
->irq_handler
= i965_irq_handler
;
4747 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
4749 dev
->driver
->enable_vblank
= i915_enable_vblank
;
4750 dev
->driver
->disable_vblank
= i915_disable_vblank
;
4754 void intel_hpd_init(struct drm_device
*dev
)
4756 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4757 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
4758 struct drm_connector
*connector
;
4759 unsigned long irqflags
;
4762 for (i
= 1; i
< HPD_NUM_PINS
; i
++) {
4763 dev_priv
->hpd_stats
[i
].hpd_cnt
= 0;
4764 dev_priv
->hpd_stats
[i
].hpd_mark
= HPD_ENABLED
;
4766 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
4767 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
4768 connector
->polled
= intel_connector
->polled
;
4769 if (connector
->encoder
&& !connector
->polled
&& I915_HAS_HOTPLUG(dev
) && intel_connector
->encoder
->hpd_pin
> HPD_NONE
)
4770 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
4771 if (intel_connector
->mst_port
)
4772 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
4775 /* Interrupt setup is already guaranteed to be single-threaded, this is
4776 * just to make the assert_spin_locked checks happy. */
4777 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
4778 if (dev_priv
->display
.hpd_irq_setup
)
4779 dev_priv
->display
.hpd_irq_setup(dev
);
4780 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
4783 /* Disable interrupts so we can allow runtime PM. */
4784 void intel_runtime_pm_disable_interrupts(struct drm_device
*dev
)
4786 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4788 dev
->driver
->irq_uninstall(dev
);
4789 dev_priv
->pm
._irqs_disabled
= true;
4792 /* Restore interrupts so we can recover from runtime PM. */
4793 void intel_runtime_pm_restore_interrupts(struct drm_device
*dev
)
4795 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4797 dev_priv
->pm
._irqs_disabled
= false;
4798 dev
->driver
->irq_preinstall(dev
);
4799 dev
->driver
->irq_postinstall(dev
);