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_gen4
[] = {
66 [HPD_CRT
] = CRT_HOTPLUG_INT_STATUS
,
67 [HPD_SDVO_B
] = SDVOB_HOTPLUG_INT_STATUS_G4X
,
68 [HPD_SDVO_C
] = SDVOC_HOTPLUG_INT_STATUS_G4X
,
69 [HPD_PORT_B
] = PORTB_HOTPLUG_INT_STATUS
,
70 [HPD_PORT_C
] = PORTC_HOTPLUG_INT_STATUS
,
71 [HPD_PORT_D
] = PORTD_HOTPLUG_INT_STATUS
74 static const u32 hpd_status_i915
[] = { /* i915 and valleyview are the same */
75 [HPD_CRT
] = CRT_HOTPLUG_INT_STATUS
,
76 [HPD_SDVO_B
] = SDVOB_HOTPLUG_INT_STATUS_I915
,
77 [HPD_SDVO_C
] = SDVOC_HOTPLUG_INT_STATUS_I915
,
78 [HPD_PORT_B
] = PORTB_HOTPLUG_INT_STATUS
,
79 [HPD_PORT_C
] = PORTC_HOTPLUG_INT_STATUS
,
80 [HPD_PORT_D
] = PORTD_HOTPLUG_INT_STATUS
83 /* For display hotplug interrupt */
85 ironlake_enable_display_irq(drm_i915_private_t
*dev_priv
, u32 mask
)
87 assert_spin_locked(&dev_priv
->irq_lock
);
89 if (dev_priv
->pc8
.irqs_disabled
) {
90 WARN(1, "IRQs disabled\n");
91 dev_priv
->pc8
.regsave
.deimr
&= ~mask
;
95 if ((dev_priv
->irq_mask
& mask
) != 0) {
96 dev_priv
->irq_mask
&= ~mask
;
97 I915_WRITE(DEIMR
, dev_priv
->irq_mask
);
103 ironlake_disable_display_irq(drm_i915_private_t
*dev_priv
, u32 mask
)
105 assert_spin_locked(&dev_priv
->irq_lock
);
107 if (dev_priv
->pc8
.irqs_disabled
) {
108 WARN(1, "IRQs disabled\n");
109 dev_priv
->pc8
.regsave
.deimr
|= mask
;
113 if ((dev_priv
->irq_mask
& mask
) != mask
) {
114 dev_priv
->irq_mask
|= mask
;
115 I915_WRITE(DEIMR
, dev_priv
->irq_mask
);
121 * ilk_update_gt_irq - update GTIMR
122 * @dev_priv: driver private
123 * @interrupt_mask: mask of interrupt bits to update
124 * @enabled_irq_mask: mask of interrupt bits to enable
126 static void ilk_update_gt_irq(struct drm_i915_private
*dev_priv
,
127 uint32_t interrupt_mask
,
128 uint32_t enabled_irq_mask
)
130 assert_spin_locked(&dev_priv
->irq_lock
);
132 if (dev_priv
->pc8
.irqs_disabled
) {
133 WARN(1, "IRQs disabled\n");
134 dev_priv
->pc8
.regsave
.gtimr
&= ~interrupt_mask
;
135 dev_priv
->pc8
.regsave
.gtimr
|= (~enabled_irq_mask
&
140 dev_priv
->gt_irq_mask
&= ~interrupt_mask
;
141 dev_priv
->gt_irq_mask
|= (~enabled_irq_mask
& interrupt_mask
);
142 I915_WRITE(GTIMR
, dev_priv
->gt_irq_mask
);
146 void ilk_enable_gt_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
148 ilk_update_gt_irq(dev_priv
, mask
, mask
);
151 void ilk_disable_gt_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
153 ilk_update_gt_irq(dev_priv
, mask
, 0);
157 * snb_update_pm_irq - update GEN6_PMIMR
158 * @dev_priv: driver private
159 * @interrupt_mask: mask of interrupt bits to update
160 * @enabled_irq_mask: mask of interrupt bits to enable
162 static void snb_update_pm_irq(struct drm_i915_private
*dev_priv
,
163 uint32_t interrupt_mask
,
164 uint32_t enabled_irq_mask
)
168 assert_spin_locked(&dev_priv
->irq_lock
);
170 if (dev_priv
->pc8
.irqs_disabled
) {
171 WARN(1, "IRQs disabled\n");
172 dev_priv
->pc8
.regsave
.gen6_pmimr
&= ~interrupt_mask
;
173 dev_priv
->pc8
.regsave
.gen6_pmimr
|= (~enabled_irq_mask
&
178 new_val
= dev_priv
->pm_irq_mask
;
179 new_val
&= ~interrupt_mask
;
180 new_val
|= (~enabled_irq_mask
& interrupt_mask
);
182 if (new_val
!= dev_priv
->pm_irq_mask
) {
183 dev_priv
->pm_irq_mask
= new_val
;
184 I915_WRITE(GEN6_PMIMR
, dev_priv
->pm_irq_mask
);
185 POSTING_READ(GEN6_PMIMR
);
189 void snb_enable_pm_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
191 snb_update_pm_irq(dev_priv
, mask
, mask
);
194 void snb_disable_pm_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
196 snb_update_pm_irq(dev_priv
, mask
, 0);
199 static bool ivb_can_enable_err_int(struct drm_device
*dev
)
201 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
202 struct intel_crtc
*crtc
;
205 assert_spin_locked(&dev_priv
->irq_lock
);
207 for_each_pipe(pipe
) {
208 crtc
= to_intel_crtc(dev_priv
->pipe_to_crtc_mapping
[pipe
]);
210 if (crtc
->cpu_fifo_underrun_disabled
)
217 static bool cpt_can_enable_serr_int(struct drm_device
*dev
)
219 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
221 struct intel_crtc
*crtc
;
223 assert_spin_locked(&dev_priv
->irq_lock
);
225 for_each_pipe(pipe
) {
226 crtc
= to_intel_crtc(dev_priv
->pipe_to_crtc_mapping
[pipe
]);
228 if (crtc
->pch_fifo_underrun_disabled
)
235 static void ironlake_set_fifo_underrun_reporting(struct drm_device
*dev
,
236 enum pipe pipe
, bool enable
)
238 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
239 uint32_t bit
= (pipe
== PIPE_A
) ? DE_PIPEA_FIFO_UNDERRUN
:
240 DE_PIPEB_FIFO_UNDERRUN
;
243 ironlake_enable_display_irq(dev_priv
, bit
);
245 ironlake_disable_display_irq(dev_priv
, bit
);
248 static void ivybridge_set_fifo_underrun_reporting(struct drm_device
*dev
,
249 enum pipe pipe
, bool enable
)
251 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
253 I915_WRITE(GEN7_ERR_INT
, ERR_INT_FIFO_UNDERRUN(pipe
));
255 if (!ivb_can_enable_err_int(dev
))
258 ironlake_enable_display_irq(dev_priv
, DE_ERR_INT_IVB
);
260 bool was_enabled
= !(I915_READ(DEIMR
) & DE_ERR_INT_IVB
);
262 /* Change the state _after_ we've read out the current one. */
263 ironlake_disable_display_irq(dev_priv
, DE_ERR_INT_IVB
);
266 (I915_READ(GEN7_ERR_INT
) & ERR_INT_FIFO_UNDERRUN(pipe
))) {
267 DRM_DEBUG_KMS("uncleared fifo underrun on pipe %c\n",
273 static void broadwell_set_fifo_underrun_reporting(struct drm_device
*dev
,
274 enum pipe pipe
, bool enable
)
276 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
278 assert_spin_locked(&dev_priv
->irq_lock
);
281 dev_priv
->de_irq_mask
[pipe
] &= ~GEN8_PIPE_FIFO_UNDERRUN
;
283 dev_priv
->de_irq_mask
[pipe
] |= GEN8_PIPE_FIFO_UNDERRUN
;
284 I915_WRITE(GEN8_DE_PIPE_IMR(pipe
), dev_priv
->de_irq_mask
[pipe
]);
285 POSTING_READ(GEN8_DE_PIPE_IMR(pipe
));
289 * ibx_display_interrupt_update - update SDEIMR
290 * @dev_priv: driver private
291 * @interrupt_mask: mask of interrupt bits to update
292 * @enabled_irq_mask: mask of interrupt bits to enable
294 static void ibx_display_interrupt_update(struct drm_i915_private
*dev_priv
,
295 uint32_t interrupt_mask
,
296 uint32_t enabled_irq_mask
)
298 uint32_t sdeimr
= I915_READ(SDEIMR
);
299 sdeimr
&= ~interrupt_mask
;
300 sdeimr
|= (~enabled_irq_mask
& interrupt_mask
);
302 assert_spin_locked(&dev_priv
->irq_lock
);
304 if (dev_priv
->pc8
.irqs_disabled
&&
305 (interrupt_mask
& SDE_HOTPLUG_MASK_CPT
)) {
306 WARN(1, "IRQs disabled\n");
307 dev_priv
->pc8
.regsave
.sdeimr
&= ~interrupt_mask
;
308 dev_priv
->pc8
.regsave
.sdeimr
|= (~enabled_irq_mask
&
313 I915_WRITE(SDEIMR
, sdeimr
);
314 POSTING_READ(SDEIMR
);
316 #define ibx_enable_display_interrupt(dev_priv, bits) \
317 ibx_display_interrupt_update((dev_priv), (bits), (bits))
318 #define ibx_disable_display_interrupt(dev_priv, bits) \
319 ibx_display_interrupt_update((dev_priv), (bits), 0)
321 static void ibx_set_fifo_underrun_reporting(struct drm_device
*dev
,
322 enum transcoder pch_transcoder
,
325 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
326 uint32_t bit
= (pch_transcoder
== TRANSCODER_A
) ?
327 SDE_TRANSA_FIFO_UNDER
: SDE_TRANSB_FIFO_UNDER
;
330 ibx_enable_display_interrupt(dev_priv
, bit
);
332 ibx_disable_display_interrupt(dev_priv
, bit
);
335 static void cpt_set_fifo_underrun_reporting(struct drm_device
*dev
,
336 enum transcoder pch_transcoder
,
339 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
343 SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder
));
345 if (!cpt_can_enable_serr_int(dev
))
348 ibx_enable_display_interrupt(dev_priv
, SDE_ERROR_CPT
);
350 uint32_t tmp
= I915_READ(SERR_INT
);
351 bool was_enabled
= !(I915_READ(SDEIMR
) & SDE_ERROR_CPT
);
353 /* Change the state _after_ we've read out the current one. */
354 ibx_disable_display_interrupt(dev_priv
, SDE_ERROR_CPT
);
357 (tmp
& SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder
))) {
358 DRM_DEBUG_KMS("uncleared pch fifo underrun on pch transcoder %c\n",
359 transcoder_name(pch_transcoder
));
365 * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
368 * @enable: true if we want to report FIFO underrun errors, false otherwise
370 * This function makes us disable or enable CPU fifo underruns for a specific
371 * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
372 * reporting for one pipe may also disable all the other CPU error interruts for
373 * the other pipes, due to the fact that there's just one interrupt mask/enable
374 * bit for all the pipes.
376 * Returns the previous state of underrun reporting.
378 bool intel_set_cpu_fifo_underrun_reporting(struct drm_device
*dev
,
379 enum pipe pipe
, bool enable
)
381 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
382 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
383 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
387 spin_lock_irqsave(&dev_priv
->irq_lock
, flags
);
389 ret
= !intel_crtc
->cpu_fifo_underrun_disabled
;
394 intel_crtc
->cpu_fifo_underrun_disabled
= !enable
;
396 if (IS_GEN5(dev
) || IS_GEN6(dev
))
397 ironlake_set_fifo_underrun_reporting(dev
, pipe
, enable
);
398 else if (IS_GEN7(dev
))
399 ivybridge_set_fifo_underrun_reporting(dev
, pipe
, enable
);
400 else if (IS_GEN8(dev
))
401 broadwell_set_fifo_underrun_reporting(dev
, pipe
, enable
);
404 spin_unlock_irqrestore(&dev_priv
->irq_lock
, flags
);
409 * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
411 * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
412 * @enable: true if we want to report FIFO underrun errors, false otherwise
414 * This function makes us disable or enable PCH fifo underruns for a specific
415 * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
416 * underrun reporting for one transcoder may also disable all the other PCH
417 * error interruts for the other transcoders, due to the fact that there's just
418 * one interrupt mask/enable bit for all the transcoders.
420 * Returns the previous state of underrun reporting.
422 bool intel_set_pch_fifo_underrun_reporting(struct drm_device
*dev
,
423 enum transcoder pch_transcoder
,
426 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
427 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pch_transcoder
];
428 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
433 * NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT
434 * has only one pch transcoder A that all pipes can use. To avoid racy
435 * pch transcoder -> pipe lookups from interrupt code simply store the
436 * underrun statistics in crtc A. Since we never expose this anywhere
437 * nor use it outside of the fifo underrun code here using the "wrong"
438 * crtc on LPT won't cause issues.
441 spin_lock_irqsave(&dev_priv
->irq_lock
, flags
);
443 ret
= !intel_crtc
->pch_fifo_underrun_disabled
;
448 intel_crtc
->pch_fifo_underrun_disabled
= !enable
;
450 if (HAS_PCH_IBX(dev
))
451 ibx_set_fifo_underrun_reporting(dev
, pch_transcoder
, enable
);
453 cpt_set_fifo_underrun_reporting(dev
, pch_transcoder
, enable
);
456 spin_unlock_irqrestore(&dev_priv
->irq_lock
, flags
);
462 i915_enable_pipestat(drm_i915_private_t
*dev_priv
, enum pipe pipe
, u32 mask
)
464 u32 reg
= PIPESTAT(pipe
);
465 u32 pipestat
= I915_READ(reg
) & 0x7fff0000;
467 assert_spin_locked(&dev_priv
->irq_lock
);
469 if ((pipestat
& mask
) == mask
)
472 /* Enable the interrupt, clear any pending status */
473 pipestat
|= mask
| (mask
>> 16);
474 I915_WRITE(reg
, pipestat
);
479 i915_disable_pipestat(drm_i915_private_t
*dev_priv
, enum pipe pipe
, u32 mask
)
481 u32 reg
= PIPESTAT(pipe
);
482 u32 pipestat
= I915_READ(reg
) & 0x7fff0000;
484 assert_spin_locked(&dev_priv
->irq_lock
);
486 if ((pipestat
& mask
) == 0)
490 I915_WRITE(reg
, pipestat
);
495 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
497 static void i915_enable_asle_pipestat(struct drm_device
*dev
)
499 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
500 unsigned long irqflags
;
502 if (!dev_priv
->opregion
.asle
|| !IS_MOBILE(dev
))
505 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
507 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_LEGACY_BLC_EVENT_ENABLE
);
508 if (INTEL_INFO(dev
)->gen
>= 4)
509 i915_enable_pipestat(dev_priv
, PIPE_A
,
510 PIPE_LEGACY_BLC_EVENT_ENABLE
);
512 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
516 * i915_pipe_enabled - check if a pipe is enabled
518 * @pipe: pipe to check
520 * Reading certain registers when the pipe is disabled can hang the chip.
521 * Use this routine to make sure the PLL is running and the pipe is active
522 * before reading such registers if unsure.
525 i915_pipe_enabled(struct drm_device
*dev
, int pipe
)
527 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
529 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
530 /* Locking is horribly broken here, but whatever. */
531 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
532 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
534 return intel_crtc
->active
;
536 return I915_READ(PIPECONF(pipe
)) & PIPECONF_ENABLE
;
540 static u32
i8xx_get_vblank_counter(struct drm_device
*dev
, int pipe
)
542 /* Gen2 doesn't have a hardware frame counter */
546 /* Called from drm generic code, passed a 'crtc', which
547 * we use as a pipe index
549 static u32
i915_get_vblank_counter(struct drm_device
*dev
, int pipe
)
551 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
552 unsigned long high_frame
;
553 unsigned long low_frame
;
554 u32 high1
, high2
, low
, pixel
, vbl_start
;
556 if (!i915_pipe_enabled(dev
, pipe
)) {
557 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
558 "pipe %c\n", pipe_name(pipe
));
562 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
563 struct intel_crtc
*intel_crtc
=
564 to_intel_crtc(dev_priv
->pipe_to_crtc_mapping
[pipe
]);
565 const struct drm_display_mode
*mode
=
566 &intel_crtc
->config
.adjusted_mode
;
568 vbl_start
= mode
->crtc_vblank_start
* mode
->crtc_htotal
;
570 enum transcoder cpu_transcoder
=
571 intel_pipe_to_cpu_transcoder(dev_priv
, pipe
);
574 htotal
= ((I915_READ(HTOTAL(cpu_transcoder
)) >> 16) & 0x1fff) + 1;
575 vbl_start
= (I915_READ(VBLANK(cpu_transcoder
)) & 0x1fff) + 1;
580 high_frame
= PIPEFRAME(pipe
);
581 low_frame
= PIPEFRAMEPIXEL(pipe
);
584 * High & low register fields aren't synchronized, so make sure
585 * we get a low value that's stable across two reads of the high
589 high1
= I915_READ(high_frame
) & PIPE_FRAME_HIGH_MASK
;
590 low
= I915_READ(low_frame
);
591 high2
= I915_READ(high_frame
) & PIPE_FRAME_HIGH_MASK
;
592 } while (high1
!= high2
);
594 high1
>>= PIPE_FRAME_HIGH_SHIFT
;
595 pixel
= low
& PIPE_PIXEL_MASK
;
596 low
>>= PIPE_FRAME_LOW_SHIFT
;
599 * The frame counter increments at beginning of active.
600 * Cook up a vblank counter by also checking the pixel
601 * counter against vblank start.
603 return (((high1
<< 8) | low
) + (pixel
>= vbl_start
)) & 0xffffff;
606 static u32
gm45_get_vblank_counter(struct drm_device
*dev
, int pipe
)
608 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
609 int reg
= PIPE_FRMCOUNT_GM45(pipe
);
611 if (!i915_pipe_enabled(dev
, pipe
)) {
612 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
613 "pipe %c\n", pipe_name(pipe
));
617 return I915_READ(reg
);
620 /* raw reads, only for fast reads of display block, no need for forcewake etc. */
621 #define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
622 #define __raw_i915_read16(dev_priv__, reg__) readw((dev_priv__)->regs + (reg__))
624 static bool intel_pipe_in_vblank_locked(struct drm_device
*dev
, enum pipe pipe
)
626 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
630 if (IS_VALLEYVIEW(dev
)) {
631 status
= pipe
== PIPE_A
?
632 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT
:
633 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT
;
636 } else if (IS_GEN2(dev
)) {
637 status
= pipe
== PIPE_A
?
638 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT
:
639 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT
;
642 } else if (INTEL_INFO(dev
)->gen
< 5) {
643 status
= pipe
== PIPE_A
?
644 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT
:
645 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT
;
648 } else if (INTEL_INFO(dev
)->gen
< 7) {
649 status
= pipe
== PIPE_A
?
658 status
= DE_PIPEA_VBLANK_IVB
;
661 status
= DE_PIPEB_VBLANK_IVB
;
664 status
= DE_PIPEC_VBLANK_IVB
;
672 return __raw_i915_read16(dev_priv
, reg
) & status
;
674 return __raw_i915_read32(dev_priv
, reg
) & status
;
677 static int i915_get_crtc_scanoutpos(struct drm_device
*dev
, int pipe
,
678 int *vpos
, int *hpos
, ktime_t
*stime
, ktime_t
*etime
)
680 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
681 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
682 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
683 const struct drm_display_mode
*mode
= &intel_crtc
->config
.adjusted_mode
;
685 int vbl_start
, vbl_end
, htotal
, vtotal
;
688 unsigned long irqflags
;
690 if (!intel_crtc
->active
) {
691 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
692 "pipe %c\n", pipe_name(pipe
));
696 htotal
= mode
->crtc_htotal
;
697 vtotal
= mode
->crtc_vtotal
;
698 vbl_start
= mode
->crtc_vblank_start
;
699 vbl_end
= mode
->crtc_vblank_end
;
701 ret
|= DRM_SCANOUTPOS_VALID
| DRM_SCANOUTPOS_ACCURATE
;
704 * Lock uncore.lock, as we will do multiple timing critical raw
705 * register reads, potentially with preemption disabled, so the
706 * following code must not block on uncore.lock.
708 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
710 /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
712 /* Get optional system timestamp before query. */
714 *stime
= ktime_get();
716 if (IS_GEN2(dev
) || IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
717 /* No obvious pixelcount register. Only query vertical
718 * scanout position from Display scan line register.
721 position
= __raw_i915_read32(dev_priv
, PIPEDSL(pipe
)) & DSL_LINEMASK_GEN2
;
723 position
= __raw_i915_read32(dev_priv
, PIPEDSL(pipe
)) & DSL_LINEMASK_GEN3
;
726 * The scanline counter increments at the leading edge
727 * of hsync, ie. it completely misses the active portion
728 * of the line. Fix up the counter at both edges of vblank
729 * to get a more accurate picture whether we're in vblank
732 in_vbl
= intel_pipe_in_vblank_locked(dev
, pipe
);
733 if ((in_vbl
&& position
== vbl_start
- 1) ||
734 (!in_vbl
&& position
== vbl_end
- 1))
735 position
= (position
+ 1) % vtotal
;
737 /* Have access to pixelcount since start of frame.
738 * We can split this into vertical and horizontal
741 position
= (__raw_i915_read32(dev_priv
, PIPEFRAMEPIXEL(pipe
)) & PIPE_PIXEL_MASK
) >> PIPE_PIXEL_SHIFT
;
743 /* convert to pixel counts */
749 /* Get optional system timestamp after query. */
751 *etime
= ktime_get();
753 /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
755 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
757 in_vbl
= position
>= vbl_start
&& position
< vbl_end
;
760 * While in vblank, position will be negative
761 * counting up towards 0 at vbl_end. And outside
762 * vblank, position will be positive counting
765 if (position
>= vbl_start
)
768 position
+= vtotal
- vbl_end
;
770 if (IS_GEN2(dev
) || IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
774 *vpos
= position
/ htotal
;
775 *hpos
= position
- (*vpos
* htotal
);
780 ret
|= DRM_SCANOUTPOS_INVBL
;
785 static int i915_get_vblank_timestamp(struct drm_device
*dev
, int pipe
,
787 struct timeval
*vblank_time
,
790 struct drm_crtc
*crtc
;
792 if (pipe
< 0 || pipe
>= INTEL_INFO(dev
)->num_pipes
) {
793 DRM_ERROR("Invalid crtc %d\n", pipe
);
797 /* Get drm_crtc to timestamp: */
798 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
800 DRM_ERROR("Invalid crtc %d\n", pipe
);
804 if (!crtc
->enabled
) {
805 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe
);
809 /* Helper routine in DRM core does all the work: */
810 return drm_calc_vbltimestamp_from_scanoutpos(dev
, pipe
, max_error
,
815 static bool intel_hpd_irq_event(struct drm_device
*dev
,
816 struct drm_connector
*connector
)
818 enum drm_connector_status old_status
;
820 WARN_ON(!mutex_is_locked(&dev
->mode_config
.mutex
));
821 old_status
= connector
->status
;
823 connector
->status
= connector
->funcs
->detect(connector
, false);
824 if (old_status
== connector
->status
)
827 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
829 drm_get_connector_name(connector
),
830 drm_get_connector_status_name(old_status
),
831 drm_get_connector_status_name(connector
->status
));
837 * Handle hotplug events outside the interrupt handler proper.
839 #define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
841 static void i915_hotplug_work_func(struct work_struct
*work
)
843 drm_i915_private_t
*dev_priv
= container_of(work
, drm_i915_private_t
,
845 struct drm_device
*dev
= dev_priv
->dev
;
846 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
847 struct intel_connector
*intel_connector
;
848 struct intel_encoder
*intel_encoder
;
849 struct drm_connector
*connector
;
850 unsigned long irqflags
;
851 bool hpd_disabled
= false;
852 bool changed
= false;
855 /* HPD irq before everything is fully set up. */
856 if (!dev_priv
->enable_hotplug_processing
)
859 mutex_lock(&mode_config
->mutex
);
860 DRM_DEBUG_KMS("running encoder hotplug functions\n");
862 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
864 hpd_event_bits
= dev_priv
->hpd_event_bits
;
865 dev_priv
->hpd_event_bits
= 0;
866 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
867 intel_connector
= to_intel_connector(connector
);
868 intel_encoder
= intel_connector
->encoder
;
869 if (intel_encoder
->hpd_pin
> HPD_NONE
&&
870 dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_MARK_DISABLED
&&
871 connector
->polled
== DRM_CONNECTOR_POLL_HPD
) {
872 DRM_INFO("HPD interrupt storm detected on connector %s: "
873 "switching from hotplug detection to polling\n",
874 drm_get_connector_name(connector
));
875 dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
= HPD_DISABLED
;
876 connector
->polled
= DRM_CONNECTOR_POLL_CONNECT
877 | DRM_CONNECTOR_POLL_DISCONNECT
;
880 if (hpd_event_bits
& (1 << intel_encoder
->hpd_pin
)) {
881 DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
882 drm_get_connector_name(connector
), intel_encoder
->hpd_pin
);
885 /* if there were no outputs to poll, poll was disabled,
886 * therefore make sure it's enabled when disabling HPD on
889 drm_kms_helper_poll_enable(dev
);
890 mod_timer(&dev_priv
->hotplug_reenable_timer
,
891 jiffies
+ msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY
));
894 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
896 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
897 intel_connector
= to_intel_connector(connector
);
898 intel_encoder
= intel_connector
->encoder
;
899 if (hpd_event_bits
& (1 << intel_encoder
->hpd_pin
)) {
900 if (intel_encoder
->hot_plug
)
901 intel_encoder
->hot_plug(intel_encoder
);
902 if (intel_hpd_irq_event(dev
, connector
))
906 mutex_unlock(&mode_config
->mutex
);
909 drm_kms_helper_hotplug_event(dev
);
912 static void ironlake_rps_change_irq_handler(struct drm_device
*dev
)
914 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
915 u32 busy_up
, busy_down
, max_avg
, min_avg
;
918 spin_lock(&mchdev_lock
);
920 I915_WRITE16(MEMINTRSTS
, I915_READ(MEMINTRSTS
));
922 new_delay
= dev_priv
->ips
.cur_delay
;
924 I915_WRITE16(MEMINTRSTS
, MEMINT_EVAL_CHG
);
925 busy_up
= I915_READ(RCPREVBSYTUPAVG
);
926 busy_down
= I915_READ(RCPREVBSYTDNAVG
);
927 max_avg
= I915_READ(RCBMAXAVG
);
928 min_avg
= I915_READ(RCBMINAVG
);
930 /* Handle RCS change request from hw */
931 if (busy_up
> max_avg
) {
932 if (dev_priv
->ips
.cur_delay
!= dev_priv
->ips
.max_delay
)
933 new_delay
= dev_priv
->ips
.cur_delay
- 1;
934 if (new_delay
< dev_priv
->ips
.max_delay
)
935 new_delay
= dev_priv
->ips
.max_delay
;
936 } else if (busy_down
< min_avg
) {
937 if (dev_priv
->ips
.cur_delay
!= dev_priv
->ips
.min_delay
)
938 new_delay
= dev_priv
->ips
.cur_delay
+ 1;
939 if (new_delay
> dev_priv
->ips
.min_delay
)
940 new_delay
= dev_priv
->ips
.min_delay
;
943 if (ironlake_set_drps(dev
, new_delay
))
944 dev_priv
->ips
.cur_delay
= new_delay
;
946 spin_unlock(&mchdev_lock
);
951 static void notify_ring(struct drm_device
*dev
,
952 struct intel_ring_buffer
*ring
)
954 if (ring
->obj
== NULL
)
957 trace_i915_gem_request_complete(ring
);
959 wake_up_all(&ring
->irq_queue
);
960 i915_queue_hangcheck(dev
);
963 static void gen6_pm_rps_work(struct work_struct
*work
)
965 drm_i915_private_t
*dev_priv
= container_of(work
, drm_i915_private_t
,
970 spin_lock_irq(&dev_priv
->irq_lock
);
971 pm_iir
= dev_priv
->rps
.pm_iir
;
972 dev_priv
->rps
.pm_iir
= 0;
973 /* Make sure not to corrupt PMIMR state used by ringbuffer code */
974 snb_enable_pm_irq(dev_priv
, GEN6_PM_RPS_EVENTS
);
975 spin_unlock_irq(&dev_priv
->irq_lock
);
977 /* Make sure we didn't queue anything we're not going to process. */
978 WARN_ON(pm_iir
& ~GEN6_PM_RPS_EVENTS
);
980 if ((pm_iir
& GEN6_PM_RPS_EVENTS
) == 0)
983 mutex_lock(&dev_priv
->rps
.hw_lock
);
985 adj
= dev_priv
->rps
.last_adj
;
986 if (pm_iir
& GEN6_PM_RP_UP_THRESHOLD
) {
991 new_delay
= dev_priv
->rps
.cur_delay
+ adj
;
994 * For better performance, jump directly
995 * to RPe if we're below it.
997 if (new_delay
< dev_priv
->rps
.rpe_delay
)
998 new_delay
= dev_priv
->rps
.rpe_delay
;
999 } else if (pm_iir
& GEN6_PM_RP_DOWN_TIMEOUT
) {
1000 if (dev_priv
->rps
.cur_delay
> dev_priv
->rps
.rpe_delay
)
1001 new_delay
= dev_priv
->rps
.rpe_delay
;
1003 new_delay
= dev_priv
->rps
.min_delay
;
1005 } else if (pm_iir
& GEN6_PM_RP_DOWN_THRESHOLD
) {
1010 new_delay
= dev_priv
->rps
.cur_delay
+ adj
;
1011 } else { /* unknown event */
1012 new_delay
= dev_priv
->rps
.cur_delay
;
1015 /* sysfs frequency interfaces may have snuck in while servicing the
1018 new_delay
= clamp_t(int, new_delay
,
1019 dev_priv
->rps
.min_delay
, dev_priv
->rps
.max_delay
);
1020 dev_priv
->rps
.last_adj
= new_delay
- dev_priv
->rps
.cur_delay
;
1022 if (IS_VALLEYVIEW(dev_priv
->dev
))
1023 valleyview_set_rps(dev_priv
->dev
, new_delay
);
1025 gen6_set_rps(dev_priv
->dev
, new_delay
);
1027 mutex_unlock(&dev_priv
->rps
.hw_lock
);
1032 * ivybridge_parity_work - Workqueue called when a parity error interrupt
1034 * @work: workqueue struct
1036 * Doesn't actually do anything except notify userspace. As a consequence of
1037 * this event, userspace should try to remap the bad rows since statistically
1038 * it is likely the same row is more likely to go bad again.
1040 static void ivybridge_parity_work(struct work_struct
*work
)
1042 drm_i915_private_t
*dev_priv
= container_of(work
, drm_i915_private_t
,
1043 l3_parity
.error_work
);
1044 u32 error_status
, row
, bank
, subbank
;
1045 char *parity_event
[6];
1047 unsigned long flags
;
1050 /* We must turn off DOP level clock gating to access the L3 registers.
1051 * In order to prevent a get/put style interface, acquire struct mutex
1052 * any time we access those registers.
1054 mutex_lock(&dev_priv
->dev
->struct_mutex
);
1056 /* If we've screwed up tracking, just let the interrupt fire again */
1057 if (WARN_ON(!dev_priv
->l3_parity
.which_slice
))
1060 misccpctl
= I915_READ(GEN7_MISCCPCTL
);
1061 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
& ~GEN7_DOP_CLOCK_GATE_ENABLE
);
1062 POSTING_READ(GEN7_MISCCPCTL
);
1064 while ((slice
= ffs(dev_priv
->l3_parity
.which_slice
)) != 0) {
1068 if (WARN_ON_ONCE(slice
>= NUM_L3_SLICES(dev_priv
->dev
)))
1071 dev_priv
->l3_parity
.which_slice
&= ~(1<<slice
);
1073 reg
= GEN7_L3CDERRST1
+ (slice
* 0x200);
1075 error_status
= I915_READ(reg
);
1076 row
= GEN7_PARITY_ERROR_ROW(error_status
);
1077 bank
= GEN7_PARITY_ERROR_BANK(error_status
);
1078 subbank
= GEN7_PARITY_ERROR_SUBBANK(error_status
);
1080 I915_WRITE(reg
, GEN7_PARITY_ERROR_VALID
| GEN7_L3CDERRST1_ENABLE
);
1083 parity_event
[0] = I915_L3_PARITY_UEVENT
"=1";
1084 parity_event
[1] = kasprintf(GFP_KERNEL
, "ROW=%d", row
);
1085 parity_event
[2] = kasprintf(GFP_KERNEL
, "BANK=%d", bank
);
1086 parity_event
[3] = kasprintf(GFP_KERNEL
, "SUBBANK=%d", subbank
);
1087 parity_event
[4] = kasprintf(GFP_KERNEL
, "SLICE=%d", slice
);
1088 parity_event
[5] = NULL
;
1090 kobject_uevent_env(&dev_priv
->dev
->primary
->kdev
->kobj
,
1091 KOBJ_CHANGE
, parity_event
);
1093 DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n",
1094 slice
, row
, bank
, subbank
);
1096 kfree(parity_event
[4]);
1097 kfree(parity_event
[3]);
1098 kfree(parity_event
[2]);
1099 kfree(parity_event
[1]);
1102 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
);
1105 WARN_ON(dev_priv
->l3_parity
.which_slice
);
1106 spin_lock_irqsave(&dev_priv
->irq_lock
, flags
);
1107 ilk_enable_gt_irq(dev_priv
, GT_PARITY_ERROR(dev_priv
->dev
));
1108 spin_unlock_irqrestore(&dev_priv
->irq_lock
, flags
);
1110 mutex_unlock(&dev_priv
->dev
->struct_mutex
);
1113 static void ivybridge_parity_error_irq_handler(struct drm_device
*dev
, u32 iir
)
1115 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1117 if (!HAS_L3_DPF(dev
))
1120 spin_lock(&dev_priv
->irq_lock
);
1121 ilk_disable_gt_irq(dev_priv
, GT_PARITY_ERROR(dev
));
1122 spin_unlock(&dev_priv
->irq_lock
);
1124 iir
&= GT_PARITY_ERROR(dev
);
1125 if (iir
& GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1
)
1126 dev_priv
->l3_parity
.which_slice
|= 1 << 1;
1128 if (iir
& GT_RENDER_L3_PARITY_ERROR_INTERRUPT
)
1129 dev_priv
->l3_parity
.which_slice
|= 1 << 0;
1131 queue_work(dev_priv
->wq
, &dev_priv
->l3_parity
.error_work
);
1134 static void ilk_gt_irq_handler(struct drm_device
*dev
,
1135 struct drm_i915_private
*dev_priv
,
1139 (GT_RENDER_USER_INTERRUPT
| GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
))
1140 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
1141 if (gt_iir
& ILK_BSD_USER_INTERRUPT
)
1142 notify_ring(dev
, &dev_priv
->ring
[VCS
]);
1145 static void snb_gt_irq_handler(struct drm_device
*dev
,
1146 struct drm_i915_private
*dev_priv
,
1151 (GT_RENDER_USER_INTERRUPT
| GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
))
1152 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
1153 if (gt_iir
& GT_BSD_USER_INTERRUPT
)
1154 notify_ring(dev
, &dev_priv
->ring
[VCS
]);
1155 if (gt_iir
& GT_BLT_USER_INTERRUPT
)
1156 notify_ring(dev
, &dev_priv
->ring
[BCS
]);
1158 if (gt_iir
& (GT_BLT_CS_ERROR_INTERRUPT
|
1159 GT_BSD_CS_ERROR_INTERRUPT
|
1160 GT_RENDER_CS_MASTER_ERROR_INTERRUPT
)) {
1161 DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir
);
1162 i915_handle_error(dev
, false);
1165 if (gt_iir
& GT_PARITY_ERROR(dev
))
1166 ivybridge_parity_error_irq_handler(dev
, gt_iir
);
1169 static irqreturn_t
gen8_gt_irq_handler(struct drm_device
*dev
,
1170 struct drm_i915_private
*dev_priv
,
1175 irqreturn_t ret
= IRQ_NONE
;
1177 if (master_ctl
& (GEN8_GT_RCS_IRQ
| GEN8_GT_BCS_IRQ
)) {
1178 tmp
= I915_READ(GEN8_GT_IIR(0));
1181 rcs
= tmp
>> GEN8_RCS_IRQ_SHIFT
;
1182 bcs
= tmp
>> GEN8_BCS_IRQ_SHIFT
;
1183 if (rcs
& GT_RENDER_USER_INTERRUPT
)
1184 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
1185 if (bcs
& GT_RENDER_USER_INTERRUPT
)
1186 notify_ring(dev
, &dev_priv
->ring
[BCS
]);
1187 I915_WRITE(GEN8_GT_IIR(0), tmp
);
1189 DRM_ERROR("The master control interrupt lied (GT0)!\n");
1192 if (master_ctl
& GEN8_GT_VCS1_IRQ
) {
1193 tmp
= I915_READ(GEN8_GT_IIR(1));
1196 vcs
= tmp
>> GEN8_VCS1_IRQ_SHIFT
;
1197 if (vcs
& GT_RENDER_USER_INTERRUPT
)
1198 notify_ring(dev
, &dev_priv
->ring
[VCS
]);
1199 I915_WRITE(GEN8_GT_IIR(1), tmp
);
1201 DRM_ERROR("The master control interrupt lied (GT1)!\n");
1204 if (master_ctl
& GEN8_GT_VECS_IRQ
) {
1205 tmp
= I915_READ(GEN8_GT_IIR(3));
1208 vcs
= tmp
>> GEN8_VECS_IRQ_SHIFT
;
1209 if (vcs
& GT_RENDER_USER_INTERRUPT
)
1210 notify_ring(dev
, &dev_priv
->ring
[VECS
]);
1211 I915_WRITE(GEN8_GT_IIR(3), tmp
);
1213 DRM_ERROR("The master control interrupt lied (GT3)!\n");
1219 #define HPD_STORM_DETECT_PERIOD 1000
1220 #define HPD_STORM_THRESHOLD 5
1222 static inline void intel_hpd_irq_handler(struct drm_device
*dev
,
1223 u32 hotplug_trigger
,
1226 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1228 bool storm_detected
= false;
1230 if (!hotplug_trigger
)
1233 spin_lock(&dev_priv
->irq_lock
);
1234 for (i
= 1; i
< HPD_NUM_PINS
; i
++) {
1236 WARN(((hpd
[i
] & hotplug_trigger
) &&
1237 dev_priv
->hpd_stats
[i
].hpd_mark
!= HPD_ENABLED
),
1238 "Received HPD interrupt although disabled\n");
1240 if (!(hpd
[i
] & hotplug_trigger
) ||
1241 dev_priv
->hpd_stats
[i
].hpd_mark
!= HPD_ENABLED
)
1244 dev_priv
->hpd_event_bits
|= (1 << i
);
1245 if (!time_in_range(jiffies
, dev_priv
->hpd_stats
[i
].hpd_last_jiffies
,
1246 dev_priv
->hpd_stats
[i
].hpd_last_jiffies
1247 + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD
))) {
1248 dev_priv
->hpd_stats
[i
].hpd_last_jiffies
= jiffies
;
1249 dev_priv
->hpd_stats
[i
].hpd_cnt
= 0;
1250 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: 0\n", i
);
1251 } else if (dev_priv
->hpd_stats
[i
].hpd_cnt
> HPD_STORM_THRESHOLD
) {
1252 dev_priv
->hpd_stats
[i
].hpd_mark
= HPD_MARK_DISABLED
;
1253 dev_priv
->hpd_event_bits
&= ~(1 << i
);
1254 DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i
);
1255 storm_detected
= true;
1257 dev_priv
->hpd_stats
[i
].hpd_cnt
++;
1258 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n", i
,
1259 dev_priv
->hpd_stats
[i
].hpd_cnt
);
1264 dev_priv
->display
.hpd_irq_setup(dev
);
1265 spin_unlock(&dev_priv
->irq_lock
);
1268 * Our hotplug handler can grab modeset locks (by calling down into the
1269 * fb helpers). Hence it must not be run on our own dev-priv->wq work
1270 * queue for otherwise the flush_work in the pageflip code will
1273 schedule_work(&dev_priv
->hotplug_work
);
1276 static void gmbus_irq_handler(struct drm_device
*dev
)
1278 struct drm_i915_private
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1280 wake_up_all(&dev_priv
->gmbus_wait_queue
);
1283 static void dp_aux_irq_handler(struct drm_device
*dev
)
1285 struct drm_i915_private
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1287 wake_up_all(&dev_priv
->gmbus_wait_queue
);
1290 #if defined(CONFIG_DEBUG_FS)
1291 static void display_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
,
1292 uint32_t crc0
, uint32_t crc1
,
1293 uint32_t crc2
, uint32_t crc3
,
1296 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1297 struct intel_pipe_crc
*pipe_crc
= &dev_priv
->pipe_crc
[pipe
];
1298 struct intel_pipe_crc_entry
*entry
;
1301 spin_lock(&pipe_crc
->lock
);
1303 if (!pipe_crc
->entries
) {
1304 spin_unlock(&pipe_crc
->lock
);
1305 DRM_ERROR("spurious interrupt\n");
1309 head
= pipe_crc
->head
;
1310 tail
= pipe_crc
->tail
;
1312 if (CIRC_SPACE(head
, tail
, INTEL_PIPE_CRC_ENTRIES_NR
) < 1) {
1313 spin_unlock(&pipe_crc
->lock
);
1314 DRM_ERROR("CRC buffer overflowing\n");
1318 entry
= &pipe_crc
->entries
[head
];
1320 entry
->frame
= dev
->driver
->get_vblank_counter(dev
, pipe
);
1321 entry
->crc
[0] = crc0
;
1322 entry
->crc
[1] = crc1
;
1323 entry
->crc
[2] = crc2
;
1324 entry
->crc
[3] = crc3
;
1325 entry
->crc
[4] = crc4
;
1327 head
= (head
+ 1) & (INTEL_PIPE_CRC_ENTRIES_NR
- 1);
1328 pipe_crc
->head
= head
;
1330 spin_unlock(&pipe_crc
->lock
);
1332 wake_up_interruptible(&pipe_crc
->wq
);
1336 display_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
,
1337 uint32_t crc0
, uint32_t crc1
,
1338 uint32_t crc2
, uint32_t crc3
,
1343 static void hsw_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
)
1345 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1347 display_pipe_crc_irq_handler(dev
, pipe
,
1348 I915_READ(PIPE_CRC_RES_1_IVB(pipe
)),
1352 static void ivb_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
)
1354 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1356 display_pipe_crc_irq_handler(dev
, pipe
,
1357 I915_READ(PIPE_CRC_RES_1_IVB(pipe
)),
1358 I915_READ(PIPE_CRC_RES_2_IVB(pipe
)),
1359 I915_READ(PIPE_CRC_RES_3_IVB(pipe
)),
1360 I915_READ(PIPE_CRC_RES_4_IVB(pipe
)),
1361 I915_READ(PIPE_CRC_RES_5_IVB(pipe
)));
1364 static void i9xx_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
)
1366 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1367 uint32_t res1
, res2
;
1369 if (INTEL_INFO(dev
)->gen
>= 3)
1370 res1
= I915_READ(PIPE_CRC_RES_RES1_I915(pipe
));
1374 if (INTEL_INFO(dev
)->gen
>= 5 || IS_G4X(dev
))
1375 res2
= I915_READ(PIPE_CRC_RES_RES2_G4X(pipe
));
1379 display_pipe_crc_irq_handler(dev
, pipe
,
1380 I915_READ(PIPE_CRC_RES_RED(pipe
)),
1381 I915_READ(PIPE_CRC_RES_GREEN(pipe
)),
1382 I915_READ(PIPE_CRC_RES_BLUE(pipe
)),
1386 /* The RPS events need forcewake, so we add them to a work queue and mask their
1387 * IMR bits until the work is done. Other interrupts can be processed without
1388 * the work queue. */
1389 static void gen6_rps_irq_handler(struct drm_i915_private
*dev_priv
, u32 pm_iir
)
1391 if (pm_iir
& GEN6_PM_RPS_EVENTS
) {
1392 spin_lock(&dev_priv
->irq_lock
);
1393 dev_priv
->rps
.pm_iir
|= pm_iir
& GEN6_PM_RPS_EVENTS
;
1394 snb_disable_pm_irq(dev_priv
, pm_iir
& GEN6_PM_RPS_EVENTS
);
1395 spin_unlock(&dev_priv
->irq_lock
);
1397 queue_work(dev_priv
->wq
, &dev_priv
->rps
.work
);
1400 if (HAS_VEBOX(dev_priv
->dev
)) {
1401 if (pm_iir
& PM_VEBOX_USER_INTERRUPT
)
1402 notify_ring(dev_priv
->dev
, &dev_priv
->ring
[VECS
]);
1404 if (pm_iir
& PM_VEBOX_CS_ERROR_INTERRUPT
) {
1405 DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir
);
1406 i915_handle_error(dev_priv
->dev
, false);
1411 static irqreturn_t
valleyview_irq_handler(int irq
, void *arg
)
1413 struct drm_device
*dev
= (struct drm_device
*) arg
;
1414 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1415 u32 iir
, gt_iir
, pm_iir
;
1416 irqreturn_t ret
= IRQ_NONE
;
1417 unsigned long irqflags
;
1419 u32 pipe_stats
[I915_MAX_PIPES
];
1421 atomic_inc(&dev_priv
->irq_received
);
1424 iir
= I915_READ(VLV_IIR
);
1425 gt_iir
= I915_READ(GTIIR
);
1426 pm_iir
= I915_READ(GEN6_PMIIR
);
1428 if (gt_iir
== 0 && pm_iir
== 0 && iir
== 0)
1433 snb_gt_irq_handler(dev
, dev_priv
, gt_iir
);
1435 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
1436 for_each_pipe(pipe
) {
1437 int reg
= PIPESTAT(pipe
);
1438 pipe_stats
[pipe
] = I915_READ(reg
);
1441 * Clear the PIPE*STAT regs before the IIR
1443 if (pipe_stats
[pipe
] & 0x8000ffff) {
1444 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
1445 DRM_DEBUG_DRIVER("pipe %c underrun\n",
1447 I915_WRITE(reg
, pipe_stats
[pipe
]);
1450 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
1452 for_each_pipe(pipe
) {
1453 if (pipe_stats
[pipe
] & PIPE_START_VBLANK_INTERRUPT_STATUS
)
1454 drm_handle_vblank(dev
, pipe
);
1456 if (pipe_stats
[pipe
] & PLANE_FLIPDONE_INT_STATUS_VLV
) {
1457 intel_prepare_page_flip(dev
, pipe
);
1458 intel_finish_page_flip(dev
, pipe
);
1461 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
1462 i9xx_pipe_crc_irq_handler(dev
, pipe
);
1465 /* Consume port. Then clear IIR or we'll miss events */
1466 if (iir
& I915_DISPLAY_PORT_INTERRUPT
) {
1467 u32 hotplug_status
= I915_READ(PORT_HOTPLUG_STAT
);
1468 u32 hotplug_trigger
= hotplug_status
& HOTPLUG_INT_STATUS_I915
;
1470 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
1473 intel_hpd_irq_handler(dev
, hotplug_trigger
, hpd_status_i915
);
1475 if (hotplug_status
& DP_AUX_CHANNEL_MASK_INT_STATUS_G4X
)
1476 dp_aux_irq_handler(dev
);
1478 I915_WRITE(PORT_HOTPLUG_STAT
, hotplug_status
);
1479 I915_READ(PORT_HOTPLUG_STAT
);
1482 if (pipe_stats
[0] & PIPE_GMBUS_INTERRUPT_STATUS
)
1483 gmbus_irq_handler(dev
);
1486 gen6_rps_irq_handler(dev_priv
, pm_iir
);
1488 I915_WRITE(GTIIR
, gt_iir
);
1489 I915_WRITE(GEN6_PMIIR
, pm_iir
);
1490 I915_WRITE(VLV_IIR
, iir
);
1497 static void ibx_irq_handler(struct drm_device
*dev
, u32 pch_iir
)
1499 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1501 u32 hotplug_trigger
= pch_iir
& SDE_HOTPLUG_MASK
;
1503 intel_hpd_irq_handler(dev
, hotplug_trigger
, hpd_ibx
);
1505 if (pch_iir
& SDE_AUDIO_POWER_MASK
) {
1506 int port
= ffs((pch_iir
& SDE_AUDIO_POWER_MASK
) >>
1507 SDE_AUDIO_POWER_SHIFT
);
1508 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
1512 if (pch_iir
& SDE_AUX_MASK
)
1513 dp_aux_irq_handler(dev
);
1515 if (pch_iir
& SDE_GMBUS
)
1516 gmbus_irq_handler(dev
);
1518 if (pch_iir
& SDE_AUDIO_HDCP_MASK
)
1519 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1521 if (pch_iir
& SDE_AUDIO_TRANS_MASK
)
1522 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1524 if (pch_iir
& SDE_POISON
)
1525 DRM_ERROR("PCH poison interrupt\n");
1527 if (pch_iir
& SDE_FDI_MASK
)
1529 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1531 I915_READ(FDI_RX_IIR(pipe
)));
1533 if (pch_iir
& (SDE_TRANSB_CRC_DONE
| SDE_TRANSA_CRC_DONE
))
1534 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1536 if (pch_iir
& (SDE_TRANSB_CRC_ERR
| SDE_TRANSA_CRC_ERR
))
1537 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
1539 if (pch_iir
& SDE_TRANSA_FIFO_UNDER
)
1540 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_A
,
1542 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1544 if (pch_iir
& SDE_TRANSB_FIFO_UNDER
)
1545 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_B
,
1547 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1550 static void ivb_err_int_handler(struct drm_device
*dev
)
1552 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1553 u32 err_int
= I915_READ(GEN7_ERR_INT
);
1556 if (err_int
& ERR_INT_POISON
)
1557 DRM_ERROR("Poison interrupt\n");
1559 for_each_pipe(pipe
) {
1560 if (err_int
& ERR_INT_FIFO_UNDERRUN(pipe
)) {
1561 if (intel_set_cpu_fifo_underrun_reporting(dev
, pipe
,
1563 DRM_DEBUG_DRIVER("Pipe %c FIFO underrun\n",
1567 if (err_int
& ERR_INT_PIPE_CRC_DONE(pipe
)) {
1568 if (IS_IVYBRIDGE(dev
))
1569 ivb_pipe_crc_irq_handler(dev
, pipe
);
1571 hsw_pipe_crc_irq_handler(dev
, pipe
);
1575 I915_WRITE(GEN7_ERR_INT
, err_int
);
1578 static void cpt_serr_int_handler(struct drm_device
*dev
)
1580 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1581 u32 serr_int
= I915_READ(SERR_INT
);
1583 if (serr_int
& SERR_INT_POISON
)
1584 DRM_ERROR("PCH poison interrupt\n");
1586 if (serr_int
& SERR_INT_TRANS_A_FIFO_UNDERRUN
)
1587 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_A
,
1589 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1591 if (serr_int
& SERR_INT_TRANS_B_FIFO_UNDERRUN
)
1592 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_B
,
1594 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1596 if (serr_int
& SERR_INT_TRANS_C_FIFO_UNDERRUN
)
1597 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_C
,
1599 DRM_DEBUG_DRIVER("PCH transcoder C FIFO underrun\n");
1601 I915_WRITE(SERR_INT
, serr_int
);
1604 static void cpt_irq_handler(struct drm_device
*dev
, u32 pch_iir
)
1606 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1608 u32 hotplug_trigger
= pch_iir
& SDE_HOTPLUG_MASK_CPT
;
1610 intel_hpd_irq_handler(dev
, hotplug_trigger
, hpd_cpt
);
1612 if (pch_iir
& SDE_AUDIO_POWER_MASK_CPT
) {
1613 int port
= ffs((pch_iir
& SDE_AUDIO_POWER_MASK_CPT
) >>
1614 SDE_AUDIO_POWER_SHIFT_CPT
);
1615 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
1619 if (pch_iir
& SDE_AUX_MASK_CPT
)
1620 dp_aux_irq_handler(dev
);
1622 if (pch_iir
& SDE_GMBUS_CPT
)
1623 gmbus_irq_handler(dev
);
1625 if (pch_iir
& SDE_AUDIO_CP_REQ_CPT
)
1626 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
1628 if (pch_iir
& SDE_AUDIO_CP_CHG_CPT
)
1629 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
1631 if (pch_iir
& SDE_FDI_MASK_CPT
)
1633 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1635 I915_READ(FDI_RX_IIR(pipe
)));
1637 if (pch_iir
& SDE_ERROR_CPT
)
1638 cpt_serr_int_handler(dev
);
1641 static void ilk_display_irq_handler(struct drm_device
*dev
, u32 de_iir
)
1643 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1646 if (de_iir
& DE_AUX_CHANNEL_A
)
1647 dp_aux_irq_handler(dev
);
1649 if (de_iir
& DE_GSE
)
1650 intel_opregion_asle_intr(dev
);
1652 if (de_iir
& DE_POISON
)
1653 DRM_ERROR("Poison interrupt\n");
1655 for_each_pipe(pipe
) {
1656 if (de_iir
& DE_PIPE_VBLANK(pipe
))
1657 drm_handle_vblank(dev
, pipe
);
1659 if (de_iir
& DE_PIPE_FIFO_UNDERRUN(pipe
))
1660 if (intel_set_cpu_fifo_underrun_reporting(dev
, pipe
, false))
1661 DRM_DEBUG_DRIVER("Pipe %c FIFO underrun\n",
1664 if (de_iir
& DE_PIPE_CRC_DONE(pipe
))
1665 i9xx_pipe_crc_irq_handler(dev
, pipe
);
1667 /* plane/pipes map 1:1 on ilk+ */
1668 if (de_iir
& DE_PLANE_FLIP_DONE(pipe
)) {
1669 intel_prepare_page_flip(dev
, pipe
);
1670 intel_finish_page_flip_plane(dev
, pipe
);
1674 /* check event from PCH */
1675 if (de_iir
& DE_PCH_EVENT
) {
1676 u32 pch_iir
= I915_READ(SDEIIR
);
1678 if (HAS_PCH_CPT(dev
))
1679 cpt_irq_handler(dev
, pch_iir
);
1681 ibx_irq_handler(dev
, pch_iir
);
1683 /* should clear PCH hotplug event before clear CPU irq */
1684 I915_WRITE(SDEIIR
, pch_iir
);
1687 if (IS_GEN5(dev
) && de_iir
& DE_PCU_EVENT
)
1688 ironlake_rps_change_irq_handler(dev
);
1691 static void ivb_display_irq_handler(struct drm_device
*dev
, u32 de_iir
)
1693 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1696 if (de_iir
& DE_ERR_INT_IVB
)
1697 ivb_err_int_handler(dev
);
1699 if (de_iir
& DE_AUX_CHANNEL_A_IVB
)
1700 dp_aux_irq_handler(dev
);
1702 if (de_iir
& DE_GSE_IVB
)
1703 intel_opregion_asle_intr(dev
);
1706 if (de_iir
& (DE_PIPE_VBLANK_IVB(i
)))
1707 drm_handle_vblank(dev
, i
);
1709 /* plane/pipes map 1:1 on ilk+ */
1710 if (de_iir
& DE_PLANE_FLIP_DONE_IVB(i
)) {
1711 intel_prepare_page_flip(dev
, i
);
1712 intel_finish_page_flip_plane(dev
, i
);
1716 /* check event from PCH */
1717 if (!HAS_PCH_NOP(dev
) && (de_iir
& DE_PCH_EVENT_IVB
)) {
1718 u32 pch_iir
= I915_READ(SDEIIR
);
1720 cpt_irq_handler(dev
, pch_iir
);
1722 /* clear PCH hotplug event before clear CPU irq */
1723 I915_WRITE(SDEIIR
, pch_iir
);
1727 static irqreturn_t
ironlake_irq_handler(int irq
, void *arg
)
1729 struct drm_device
*dev
= (struct drm_device
*) arg
;
1730 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1731 u32 de_iir
, gt_iir
, de_ier
, sde_ier
= 0;
1732 irqreturn_t ret
= IRQ_NONE
;
1734 atomic_inc(&dev_priv
->irq_received
);
1736 /* We get interrupts on unclaimed registers, so check for this before we
1737 * do any I915_{READ,WRITE}. */
1738 intel_uncore_check_errors(dev
);
1740 /* disable master interrupt before clearing iir */
1741 de_ier
= I915_READ(DEIER
);
1742 I915_WRITE(DEIER
, de_ier
& ~DE_MASTER_IRQ_CONTROL
);
1743 POSTING_READ(DEIER
);
1745 /* Disable south interrupts. We'll only write to SDEIIR once, so further
1746 * interrupts will will be stored on its back queue, and then we'll be
1747 * able to process them after we restore SDEIER (as soon as we restore
1748 * it, we'll get an interrupt if SDEIIR still has something to process
1749 * due to its back queue). */
1750 if (!HAS_PCH_NOP(dev
)) {
1751 sde_ier
= I915_READ(SDEIER
);
1752 I915_WRITE(SDEIER
, 0);
1753 POSTING_READ(SDEIER
);
1756 gt_iir
= I915_READ(GTIIR
);
1758 if (INTEL_INFO(dev
)->gen
>= 6)
1759 snb_gt_irq_handler(dev
, dev_priv
, gt_iir
);
1761 ilk_gt_irq_handler(dev
, dev_priv
, gt_iir
);
1762 I915_WRITE(GTIIR
, gt_iir
);
1766 de_iir
= I915_READ(DEIIR
);
1768 if (INTEL_INFO(dev
)->gen
>= 7)
1769 ivb_display_irq_handler(dev
, de_iir
);
1771 ilk_display_irq_handler(dev
, de_iir
);
1772 I915_WRITE(DEIIR
, de_iir
);
1776 if (INTEL_INFO(dev
)->gen
>= 6) {
1777 u32 pm_iir
= I915_READ(GEN6_PMIIR
);
1779 gen6_rps_irq_handler(dev_priv
, pm_iir
);
1780 I915_WRITE(GEN6_PMIIR
, pm_iir
);
1785 I915_WRITE(DEIER
, de_ier
);
1786 POSTING_READ(DEIER
);
1787 if (!HAS_PCH_NOP(dev
)) {
1788 I915_WRITE(SDEIER
, sde_ier
);
1789 POSTING_READ(SDEIER
);
1795 static irqreturn_t
gen8_irq_handler(int irq
, void *arg
)
1797 struct drm_device
*dev
= arg
;
1798 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1800 irqreturn_t ret
= IRQ_NONE
;
1804 atomic_inc(&dev_priv
->irq_received
);
1806 master_ctl
= I915_READ(GEN8_MASTER_IRQ
);
1807 master_ctl
&= ~GEN8_MASTER_IRQ_CONTROL
;
1811 I915_WRITE(GEN8_MASTER_IRQ
, 0);
1812 POSTING_READ(GEN8_MASTER_IRQ
);
1814 ret
= gen8_gt_irq_handler(dev
, dev_priv
, master_ctl
);
1816 if (master_ctl
& GEN8_DE_MISC_IRQ
) {
1817 tmp
= I915_READ(GEN8_DE_MISC_IIR
);
1818 if (tmp
& GEN8_DE_MISC_GSE
)
1819 intel_opregion_asle_intr(dev
);
1821 DRM_ERROR("Unexpected DE Misc interrupt\n");
1823 DRM_ERROR("The master control interrupt lied (DE MISC)!\n");
1826 I915_WRITE(GEN8_DE_MISC_IIR
, tmp
);
1831 if (master_ctl
& GEN8_DE_PORT_IRQ
) {
1832 tmp
= I915_READ(GEN8_DE_PORT_IIR
);
1833 if (tmp
& GEN8_AUX_CHANNEL_A
)
1834 dp_aux_irq_handler(dev
);
1836 DRM_ERROR("Unexpected DE Port interrupt\n");
1838 DRM_ERROR("The master control interrupt lied (DE PORT)!\n");
1841 I915_WRITE(GEN8_DE_PORT_IIR
, tmp
);
1846 for_each_pipe(pipe
) {
1849 if (!(master_ctl
& GEN8_DE_PIPE_IRQ(pipe
)))
1852 pipe_iir
= I915_READ(GEN8_DE_PIPE_IIR(pipe
));
1853 if (pipe_iir
& GEN8_PIPE_VBLANK
)
1854 drm_handle_vblank(dev
, pipe
);
1856 if (pipe_iir
& GEN8_PIPE_FLIP_DONE
) {
1857 intel_prepare_page_flip(dev
, pipe
);
1858 intel_finish_page_flip_plane(dev
, pipe
);
1861 if (pipe_iir
& GEN8_PIPE_CDCLK_CRC_DONE
)
1862 hsw_pipe_crc_irq_handler(dev
, pipe
);
1864 if (pipe_iir
& GEN8_PIPE_FIFO_UNDERRUN
) {
1865 if (intel_set_cpu_fifo_underrun_reporting(dev
, pipe
,
1867 DRM_DEBUG_DRIVER("Pipe %c FIFO underrun\n",
1871 if (pipe_iir
& GEN8_DE_PIPE_IRQ_FAULT_ERRORS
) {
1872 DRM_ERROR("Fault errors on pipe %c\n: 0x%08x",
1874 pipe_iir
& GEN8_DE_PIPE_IRQ_FAULT_ERRORS
);
1879 I915_WRITE(GEN8_DE_PIPE_IIR(pipe
), pipe_iir
);
1881 DRM_ERROR("The master control interrupt lied (DE PIPE)!\n");
1884 if (!HAS_PCH_NOP(dev
) && master_ctl
& GEN8_DE_PCH_IRQ
) {
1886 * FIXME(BDW): Assume for now that the new interrupt handling
1887 * scheme also closed the SDE interrupt handling race we've seen
1888 * on older pch-split platforms. But this needs testing.
1890 u32 pch_iir
= I915_READ(SDEIIR
);
1892 cpt_irq_handler(dev
, pch_iir
);
1895 I915_WRITE(SDEIIR
, pch_iir
);
1900 I915_WRITE(GEN8_MASTER_IRQ
, GEN8_MASTER_IRQ_CONTROL
);
1901 POSTING_READ(GEN8_MASTER_IRQ
);
1906 static void i915_error_wake_up(struct drm_i915_private
*dev_priv
,
1907 bool reset_completed
)
1909 struct intel_ring_buffer
*ring
;
1913 * Notify all waiters for GPU completion events that reset state has
1914 * been changed, and that they need to restart their wait after
1915 * checking for potential errors (and bail out to drop locks if there is
1916 * a gpu reset pending so that i915_error_work_func can acquire them).
1919 /* Wake up __wait_seqno, potentially holding dev->struct_mutex. */
1920 for_each_ring(ring
, dev_priv
, i
)
1921 wake_up_all(&ring
->irq_queue
);
1923 /* Wake up intel_crtc_wait_for_pending_flips, holding crtc->mutex. */
1924 wake_up_all(&dev_priv
->pending_flip_queue
);
1927 * Signal tasks blocked in i915_gem_wait_for_error that the pending
1928 * reset state is cleared.
1930 if (reset_completed
)
1931 wake_up_all(&dev_priv
->gpu_error
.reset_queue
);
1935 * i915_error_work_func - do process context error handling work
1936 * @work: work struct
1938 * Fire an error uevent so userspace can see that a hang or error
1941 static void i915_error_work_func(struct work_struct
*work
)
1943 struct i915_gpu_error
*error
= container_of(work
, struct i915_gpu_error
,
1945 drm_i915_private_t
*dev_priv
= container_of(error
, drm_i915_private_t
,
1947 struct drm_device
*dev
= dev_priv
->dev
;
1948 char *error_event
[] = { I915_ERROR_UEVENT
"=1", NULL
};
1949 char *reset_event
[] = { I915_RESET_UEVENT
"=1", NULL
};
1950 char *reset_done_event
[] = { I915_ERROR_UEVENT
"=0", NULL
};
1953 kobject_uevent_env(&dev
->primary
->kdev
->kobj
, KOBJ_CHANGE
, error_event
);
1956 * Note that there's only one work item which does gpu resets, so we
1957 * need not worry about concurrent gpu resets potentially incrementing
1958 * error->reset_counter twice. We only need to take care of another
1959 * racing irq/hangcheck declaring the gpu dead for a second time. A
1960 * quick check for that is good enough: schedule_work ensures the
1961 * correct ordering between hang detection and this work item, and since
1962 * the reset in-progress bit is only ever set by code outside of this
1963 * work we don't need to worry about any other races.
1965 if (i915_reset_in_progress(error
) && !i915_terminally_wedged(error
)) {
1966 DRM_DEBUG_DRIVER("resetting chip\n");
1967 kobject_uevent_env(&dev
->primary
->kdev
->kobj
, KOBJ_CHANGE
,
1971 * All state reset _must_ be completed before we update the
1972 * reset counter, for otherwise waiters might miss the reset
1973 * pending state and not properly drop locks, resulting in
1974 * deadlocks with the reset work.
1976 ret
= i915_reset(dev
);
1978 intel_display_handle_reset(dev
);
1982 * After all the gem state is reset, increment the reset
1983 * counter and wake up everyone waiting for the reset to
1986 * Since unlock operations are a one-sided barrier only,
1987 * we need to insert a barrier here to order any seqno
1989 * the counter increment.
1991 smp_mb__before_atomic_inc();
1992 atomic_inc(&dev_priv
->gpu_error
.reset_counter
);
1994 kobject_uevent_env(&dev
->primary
->kdev
->kobj
,
1995 KOBJ_CHANGE
, reset_done_event
);
1997 atomic_set_mask(I915_WEDGED
, &error
->reset_counter
);
2001 * Note: The wake_up also serves as a memory barrier so that
2002 * waiters see the update value of the reset counter atomic_t.
2004 i915_error_wake_up(dev_priv
, true);
2008 static void i915_report_and_clear_eir(struct drm_device
*dev
)
2010 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2011 uint32_t instdone
[I915_NUM_INSTDONE_REG
];
2012 u32 eir
= I915_READ(EIR
);
2018 pr_err("render error detected, EIR: 0x%08x\n", eir
);
2020 i915_get_extra_instdone(dev
, instdone
);
2023 if (eir
& (GM45_ERROR_MEM_PRIV
| GM45_ERROR_CP_PRIV
)) {
2024 u32 ipeir
= I915_READ(IPEIR_I965
);
2026 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965
));
2027 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965
));
2028 for (i
= 0; i
< ARRAY_SIZE(instdone
); i
++)
2029 pr_err(" INSTDONE_%d: 0x%08x\n", i
, instdone
[i
]);
2030 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS
));
2031 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965
));
2032 I915_WRITE(IPEIR_I965
, ipeir
);
2033 POSTING_READ(IPEIR_I965
);
2035 if (eir
& GM45_ERROR_PAGE_TABLE
) {
2036 u32 pgtbl_err
= I915_READ(PGTBL_ER
);
2037 pr_err("page table error\n");
2038 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err
);
2039 I915_WRITE(PGTBL_ER
, pgtbl_err
);
2040 POSTING_READ(PGTBL_ER
);
2044 if (!IS_GEN2(dev
)) {
2045 if (eir
& I915_ERROR_PAGE_TABLE
) {
2046 u32 pgtbl_err
= I915_READ(PGTBL_ER
);
2047 pr_err("page table error\n");
2048 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err
);
2049 I915_WRITE(PGTBL_ER
, pgtbl_err
);
2050 POSTING_READ(PGTBL_ER
);
2054 if (eir
& I915_ERROR_MEMORY_REFRESH
) {
2055 pr_err("memory refresh error:\n");
2057 pr_err("pipe %c stat: 0x%08x\n",
2058 pipe_name(pipe
), I915_READ(PIPESTAT(pipe
)));
2059 /* pipestat has already been acked */
2061 if (eir
& I915_ERROR_INSTRUCTION
) {
2062 pr_err("instruction error\n");
2063 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM
));
2064 for (i
= 0; i
< ARRAY_SIZE(instdone
); i
++)
2065 pr_err(" INSTDONE_%d: 0x%08x\n", i
, instdone
[i
]);
2066 if (INTEL_INFO(dev
)->gen
< 4) {
2067 u32 ipeir
= I915_READ(IPEIR
);
2069 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR
));
2070 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR
));
2071 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD
));
2072 I915_WRITE(IPEIR
, ipeir
);
2073 POSTING_READ(IPEIR
);
2075 u32 ipeir
= I915_READ(IPEIR_I965
);
2077 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965
));
2078 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965
));
2079 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS
));
2080 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965
));
2081 I915_WRITE(IPEIR_I965
, ipeir
);
2082 POSTING_READ(IPEIR_I965
);
2086 I915_WRITE(EIR
, eir
);
2088 eir
= I915_READ(EIR
);
2091 * some errors might have become stuck,
2094 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir
);
2095 I915_WRITE(EMR
, I915_READ(EMR
) | eir
);
2096 I915_WRITE(IIR
, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
2101 * i915_handle_error - handle an error interrupt
2104 * Do some basic checking of regsiter state at error interrupt time and
2105 * dump it to the syslog. Also call i915_capture_error_state() to make
2106 * sure we get a record and make it available in debugfs. Fire a uevent
2107 * so userspace knows something bad happened (should trigger collection
2108 * of a ring dump etc.).
2110 void i915_handle_error(struct drm_device
*dev
, bool wedged
)
2112 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2114 i915_capture_error_state(dev
);
2115 i915_report_and_clear_eir(dev
);
2118 atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG
,
2119 &dev_priv
->gpu_error
.reset_counter
);
2122 * Wakeup waiting processes so that the reset work function
2123 * i915_error_work_func doesn't deadlock trying to grab various
2124 * locks. By bumping the reset counter first, the woken
2125 * processes will see a reset in progress and back off,
2126 * releasing their locks and then wait for the reset completion.
2127 * We must do this for _all_ gpu waiters that might hold locks
2128 * that the reset work needs to acquire.
2130 * Note: The wake_up serves as the required memory barrier to
2131 * ensure that the waiters see the updated value of the reset
2134 i915_error_wake_up(dev_priv
, false);
2138 * Our reset work can grab modeset locks (since it needs to reset the
2139 * state of outstanding pagelips). Hence it must not be run on our own
2140 * dev-priv->wq work queue for otherwise the flush_work in the pageflip
2141 * code will deadlock.
2143 schedule_work(&dev_priv
->gpu_error
.work
);
2146 static void __always_unused
i915_pageflip_stall_check(struct drm_device
*dev
, int pipe
)
2148 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2149 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
2150 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2151 struct drm_i915_gem_object
*obj
;
2152 struct intel_unpin_work
*work
;
2153 unsigned long flags
;
2154 bool stall_detected
;
2156 /* Ignore early vblank irqs */
2157 if (intel_crtc
== NULL
)
2160 spin_lock_irqsave(&dev
->event_lock
, flags
);
2161 work
= intel_crtc
->unpin_work
;
2164 atomic_read(&work
->pending
) >= INTEL_FLIP_COMPLETE
||
2165 !work
->enable_stall_check
) {
2166 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
2167 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
2171 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
2172 obj
= work
->pending_flip_obj
;
2173 if (INTEL_INFO(dev
)->gen
>= 4) {
2174 int dspsurf
= DSPSURF(intel_crtc
->plane
);
2175 stall_detected
= I915_HI_DISPBASE(I915_READ(dspsurf
)) ==
2176 i915_gem_obj_ggtt_offset(obj
);
2178 int dspaddr
= DSPADDR(intel_crtc
->plane
);
2179 stall_detected
= I915_READ(dspaddr
) == (i915_gem_obj_ggtt_offset(obj
) +
2180 crtc
->y
* crtc
->fb
->pitches
[0] +
2181 crtc
->x
* crtc
->fb
->bits_per_pixel
/8);
2184 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
2186 if (stall_detected
) {
2187 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
2188 intel_prepare_page_flip(dev
, intel_crtc
->plane
);
2192 /* Called from drm generic code, passed 'crtc' which
2193 * we use as a pipe index
2195 static int i915_enable_vblank(struct drm_device
*dev
, int pipe
)
2197 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2198 unsigned long irqflags
;
2200 if (!i915_pipe_enabled(dev
, pipe
))
2203 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2204 if (INTEL_INFO(dev
)->gen
>= 4)
2205 i915_enable_pipestat(dev_priv
, pipe
,
2206 PIPE_START_VBLANK_INTERRUPT_ENABLE
);
2208 i915_enable_pipestat(dev_priv
, pipe
,
2209 PIPE_VBLANK_INTERRUPT_ENABLE
);
2211 /* maintain vblank delivery even in deep C-states */
2212 if (dev_priv
->info
->gen
== 3)
2213 I915_WRITE(INSTPM
, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS
));
2214 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2219 static int ironlake_enable_vblank(struct drm_device
*dev
, int pipe
)
2221 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2222 unsigned long irqflags
;
2223 uint32_t bit
= (INTEL_INFO(dev
)->gen
>= 7) ? DE_PIPE_VBLANK_IVB(pipe
) :
2224 DE_PIPE_VBLANK(pipe
);
2226 if (!i915_pipe_enabled(dev
, pipe
))
2229 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2230 ironlake_enable_display_irq(dev_priv
, bit
);
2231 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2236 static int valleyview_enable_vblank(struct drm_device
*dev
, int pipe
)
2238 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2239 unsigned long irqflags
;
2242 if (!i915_pipe_enabled(dev
, pipe
))
2245 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2246 imr
= I915_READ(VLV_IMR
);
2248 imr
&= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT
;
2250 imr
&= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT
;
2251 I915_WRITE(VLV_IMR
, imr
);
2252 i915_enable_pipestat(dev_priv
, pipe
,
2253 PIPE_START_VBLANK_INTERRUPT_ENABLE
);
2254 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2259 static int gen8_enable_vblank(struct drm_device
*dev
, int pipe
)
2261 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2262 unsigned long irqflags
;
2264 if (!i915_pipe_enabled(dev
, pipe
))
2267 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2268 dev_priv
->de_irq_mask
[pipe
] &= ~GEN8_PIPE_VBLANK
;
2269 I915_WRITE(GEN8_DE_PIPE_IMR(pipe
), dev_priv
->de_irq_mask
[pipe
]);
2270 POSTING_READ(GEN8_DE_PIPE_IMR(pipe
));
2271 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2275 /* Called from drm generic code, passed 'crtc' which
2276 * we use as a pipe index
2278 static void i915_disable_vblank(struct drm_device
*dev
, int pipe
)
2280 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2281 unsigned long irqflags
;
2283 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2284 if (dev_priv
->info
->gen
== 3)
2285 I915_WRITE(INSTPM
, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS
));
2287 i915_disable_pipestat(dev_priv
, pipe
,
2288 PIPE_VBLANK_INTERRUPT_ENABLE
|
2289 PIPE_START_VBLANK_INTERRUPT_ENABLE
);
2290 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2293 static void ironlake_disable_vblank(struct drm_device
*dev
, int pipe
)
2295 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2296 unsigned long irqflags
;
2297 uint32_t bit
= (INTEL_INFO(dev
)->gen
>= 7) ? DE_PIPE_VBLANK_IVB(pipe
) :
2298 DE_PIPE_VBLANK(pipe
);
2300 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2301 ironlake_disable_display_irq(dev_priv
, bit
);
2302 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2305 static void valleyview_disable_vblank(struct drm_device
*dev
, int pipe
)
2307 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2308 unsigned long irqflags
;
2311 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2312 i915_disable_pipestat(dev_priv
, pipe
,
2313 PIPE_START_VBLANK_INTERRUPT_ENABLE
);
2314 imr
= I915_READ(VLV_IMR
);
2316 imr
|= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT
;
2318 imr
|= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT
;
2319 I915_WRITE(VLV_IMR
, imr
);
2320 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2323 static void gen8_disable_vblank(struct drm_device
*dev
, int pipe
)
2325 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2326 unsigned long irqflags
;
2328 if (!i915_pipe_enabled(dev
, pipe
))
2331 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2332 dev_priv
->de_irq_mask
[pipe
] |= GEN8_PIPE_VBLANK
;
2333 I915_WRITE(GEN8_DE_PIPE_IMR(pipe
), dev_priv
->de_irq_mask
[pipe
]);
2334 POSTING_READ(GEN8_DE_PIPE_IMR(pipe
));
2335 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2339 ring_last_seqno(struct intel_ring_buffer
*ring
)
2341 return list_entry(ring
->request_list
.prev
,
2342 struct drm_i915_gem_request
, list
)->seqno
;
2346 ring_idle(struct intel_ring_buffer
*ring
, u32 seqno
)
2348 return (list_empty(&ring
->request_list
) ||
2349 i915_seqno_passed(seqno
, ring_last_seqno(ring
)));
2352 static struct intel_ring_buffer
*
2353 semaphore_waits_for(struct intel_ring_buffer
*ring
, u32
*seqno
)
2355 struct drm_i915_private
*dev_priv
= ring
->dev
->dev_private
;
2356 u32 cmd
, ipehr
, acthd
, acthd_min
;
2358 ipehr
= I915_READ(RING_IPEHR(ring
->mmio_base
));
2359 if ((ipehr
& ~(0x3 << 16)) !=
2360 (MI_SEMAPHORE_MBOX
| MI_SEMAPHORE_COMPARE
| MI_SEMAPHORE_REGISTER
))
2363 /* ACTHD is likely pointing to the dword after the actual command,
2364 * so scan backwards until we find the MBOX.
2366 acthd
= intel_ring_get_active_head(ring
) & HEAD_ADDR
;
2367 acthd_min
= max((int)acthd
- 3 * 4, 0);
2369 cmd
= ioread32(ring
->virtual_start
+ acthd
);
2374 if (acthd
< acthd_min
)
2378 *seqno
= ioread32(ring
->virtual_start
+acthd
+4)+1;
2379 return &dev_priv
->ring
[(ring
->id
+ (((ipehr
>> 17) & 1) + 1)) % 3];
2382 static int semaphore_passed(struct intel_ring_buffer
*ring
)
2384 struct drm_i915_private
*dev_priv
= ring
->dev
->dev_private
;
2385 struct intel_ring_buffer
*signaller
;
2388 ring
->hangcheck
.deadlock
= true;
2390 signaller
= semaphore_waits_for(ring
, &seqno
);
2391 if (signaller
== NULL
|| signaller
->hangcheck
.deadlock
)
2394 /* cursory check for an unkickable deadlock */
2395 ctl
= I915_READ_CTL(signaller
);
2396 if (ctl
& RING_WAIT_SEMAPHORE
&& semaphore_passed(signaller
) < 0)
2399 return i915_seqno_passed(signaller
->get_seqno(signaller
, false), seqno
);
2402 static void semaphore_clear_deadlocks(struct drm_i915_private
*dev_priv
)
2404 struct intel_ring_buffer
*ring
;
2407 for_each_ring(ring
, dev_priv
, i
)
2408 ring
->hangcheck
.deadlock
= false;
2411 static enum intel_ring_hangcheck_action
2412 ring_stuck(struct intel_ring_buffer
*ring
, u32 acthd
)
2414 struct drm_device
*dev
= ring
->dev
;
2415 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2418 if (ring
->hangcheck
.acthd
!= acthd
)
2419 return HANGCHECK_ACTIVE
;
2422 return HANGCHECK_HUNG
;
2424 /* Is the chip hanging on a WAIT_FOR_EVENT?
2425 * If so we can simply poke the RB_WAIT bit
2426 * and break the hang. This should work on
2427 * all but the second generation chipsets.
2429 tmp
= I915_READ_CTL(ring
);
2430 if (tmp
& RING_WAIT
) {
2431 DRM_ERROR("Kicking stuck wait on %s\n",
2433 i915_handle_error(dev
, false);
2434 I915_WRITE_CTL(ring
, tmp
);
2435 return HANGCHECK_KICK
;
2438 if (INTEL_INFO(dev
)->gen
>= 6 && tmp
& RING_WAIT_SEMAPHORE
) {
2439 switch (semaphore_passed(ring
)) {
2441 return HANGCHECK_HUNG
;
2443 DRM_ERROR("Kicking stuck semaphore on %s\n",
2445 i915_handle_error(dev
, false);
2446 I915_WRITE_CTL(ring
, tmp
);
2447 return HANGCHECK_KICK
;
2449 return HANGCHECK_WAIT
;
2453 return HANGCHECK_HUNG
;
2457 * This is called when the chip hasn't reported back with completed
2458 * batchbuffers in a long time. We keep track per ring seqno progress and
2459 * if there are no progress, hangcheck score for that ring is increased.
2460 * Further, acthd is inspected to see if the ring is stuck. On stuck case
2461 * we kick the ring. If we see no progress on three subsequent calls
2462 * we assume chip is wedged and try to fix it by resetting the chip.
2464 static void i915_hangcheck_elapsed(unsigned long data
)
2466 struct drm_device
*dev
= (struct drm_device
*)data
;
2467 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2468 struct intel_ring_buffer
*ring
;
2470 int busy_count
= 0, rings_hung
= 0;
2471 bool stuck
[I915_NUM_RINGS
] = { 0 };
2477 if (!i915_enable_hangcheck
)
2480 for_each_ring(ring
, dev_priv
, i
) {
2484 semaphore_clear_deadlocks(dev_priv
);
2486 seqno
= ring
->get_seqno(ring
, false);
2487 acthd
= intel_ring_get_active_head(ring
);
2489 if (ring
->hangcheck
.seqno
== seqno
) {
2490 if (ring_idle(ring
, seqno
)) {
2491 ring
->hangcheck
.action
= HANGCHECK_IDLE
;
2493 if (waitqueue_active(&ring
->irq_queue
)) {
2494 /* Issue a wake-up to catch stuck h/w. */
2495 if (!test_and_set_bit(ring
->id
, &dev_priv
->gpu_error
.missed_irq_rings
)) {
2496 if (!(dev_priv
->gpu_error
.test_irq_rings
& intel_ring_flag(ring
)))
2497 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
2500 DRM_INFO("Fake missed irq on %s\n",
2502 wake_up_all(&ring
->irq_queue
);
2504 /* Safeguard against driver failure */
2505 ring
->hangcheck
.score
+= BUSY
;
2509 /* We always increment the hangcheck score
2510 * if the ring is busy and still processing
2511 * the same request, so that no single request
2512 * can run indefinitely (such as a chain of
2513 * batches). The only time we do not increment
2514 * the hangcheck score on this ring, if this
2515 * ring is in a legitimate wait for another
2516 * ring. In that case the waiting ring is a
2517 * victim and we want to be sure we catch the
2518 * right culprit. Then every time we do kick
2519 * the ring, add a small increment to the
2520 * score so that we can catch a batch that is
2521 * being repeatedly kicked and so responsible
2522 * for stalling the machine.
2524 ring
->hangcheck
.action
= ring_stuck(ring
,
2527 switch (ring
->hangcheck
.action
) {
2528 case HANGCHECK_IDLE
:
2529 case HANGCHECK_WAIT
:
2531 case HANGCHECK_ACTIVE
:
2532 ring
->hangcheck
.score
+= BUSY
;
2534 case HANGCHECK_KICK
:
2535 ring
->hangcheck
.score
+= KICK
;
2537 case HANGCHECK_HUNG
:
2538 ring
->hangcheck
.score
+= HUNG
;
2544 ring
->hangcheck
.action
= HANGCHECK_ACTIVE
;
2546 /* Gradually reduce the count so that we catch DoS
2547 * attempts across multiple batches.
2549 if (ring
->hangcheck
.score
> 0)
2550 ring
->hangcheck
.score
--;
2553 ring
->hangcheck
.seqno
= seqno
;
2554 ring
->hangcheck
.acthd
= acthd
;
2558 for_each_ring(ring
, dev_priv
, i
) {
2559 if (ring
->hangcheck
.score
> FIRE
) {
2560 DRM_INFO("%s on %s\n",
2561 stuck
[i
] ? "stuck" : "no progress",
2568 return i915_handle_error(dev
, true);
2571 /* Reset timer case chip hangs without another request
2573 i915_queue_hangcheck(dev
);
2576 void i915_queue_hangcheck(struct drm_device
*dev
)
2578 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2579 if (!i915_enable_hangcheck
)
2582 mod_timer(&dev_priv
->gpu_error
.hangcheck_timer
,
2583 round_jiffies_up(jiffies
+ DRM_I915_HANGCHECK_JIFFIES
));
2586 static void ibx_irq_preinstall(struct drm_device
*dev
)
2588 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2590 if (HAS_PCH_NOP(dev
))
2593 /* south display irq */
2594 I915_WRITE(SDEIMR
, 0xffffffff);
2596 * SDEIER is also touched by the interrupt handler to work around missed
2597 * PCH interrupts. Hence we can't update it after the interrupt handler
2598 * is enabled - instead we unconditionally enable all PCH interrupt
2599 * sources here, but then only unmask them as needed with SDEIMR.
2601 I915_WRITE(SDEIER
, 0xffffffff);
2602 POSTING_READ(SDEIER
);
2605 static void gen5_gt_irq_preinstall(struct drm_device
*dev
)
2607 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2610 I915_WRITE(GTIMR
, 0xffffffff);
2611 I915_WRITE(GTIER
, 0x0);
2612 POSTING_READ(GTIER
);
2614 if (INTEL_INFO(dev
)->gen
>= 6) {
2616 I915_WRITE(GEN6_PMIMR
, 0xffffffff);
2617 I915_WRITE(GEN6_PMIER
, 0x0);
2618 POSTING_READ(GEN6_PMIER
);
2624 static void ironlake_irq_preinstall(struct drm_device
*dev
)
2626 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2628 atomic_set(&dev_priv
->irq_received
, 0);
2630 I915_WRITE(HWSTAM
, 0xeffe);
2632 I915_WRITE(DEIMR
, 0xffffffff);
2633 I915_WRITE(DEIER
, 0x0);
2634 POSTING_READ(DEIER
);
2636 gen5_gt_irq_preinstall(dev
);
2638 ibx_irq_preinstall(dev
);
2641 static void valleyview_irq_preinstall(struct drm_device
*dev
)
2643 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2646 atomic_set(&dev_priv
->irq_received
, 0);
2649 I915_WRITE(VLV_IMR
, 0);
2650 I915_WRITE(RING_IMR(RENDER_RING_BASE
), 0);
2651 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE
), 0);
2652 I915_WRITE(RING_IMR(BLT_RING_BASE
), 0);
2655 I915_WRITE(GTIIR
, I915_READ(GTIIR
));
2656 I915_WRITE(GTIIR
, I915_READ(GTIIR
));
2658 gen5_gt_irq_preinstall(dev
);
2660 I915_WRITE(DPINVGTT
, 0xff);
2662 I915_WRITE(PORT_HOTPLUG_EN
, 0);
2663 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
2665 I915_WRITE(PIPESTAT(pipe
), 0xffff);
2666 I915_WRITE(VLV_IIR
, 0xffffffff);
2667 I915_WRITE(VLV_IMR
, 0xffffffff);
2668 I915_WRITE(VLV_IER
, 0x0);
2669 POSTING_READ(VLV_IER
);
2672 static void gen8_irq_preinstall(struct drm_device
*dev
)
2674 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2677 atomic_set(&dev_priv
->irq_received
, 0);
2679 I915_WRITE(GEN8_MASTER_IRQ
, 0);
2680 POSTING_READ(GEN8_MASTER_IRQ
);
2682 /* IIR can theoretically queue up two events. Be paranoid */
2683 #define GEN8_IRQ_INIT_NDX(type, which) do { \
2684 I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
2685 POSTING_READ(GEN8_##type##_IMR(which)); \
2686 I915_WRITE(GEN8_##type##_IER(which), 0); \
2687 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
2688 POSTING_READ(GEN8_##type##_IIR(which)); \
2689 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
2692 #define GEN8_IRQ_INIT(type) do { \
2693 I915_WRITE(GEN8_##type##_IMR, 0xffffffff); \
2694 POSTING_READ(GEN8_##type##_IMR); \
2695 I915_WRITE(GEN8_##type##_IER, 0); \
2696 I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \
2697 POSTING_READ(GEN8_##type##_IIR); \
2698 I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \
2701 GEN8_IRQ_INIT_NDX(GT
, 0);
2702 GEN8_IRQ_INIT_NDX(GT
, 1);
2703 GEN8_IRQ_INIT_NDX(GT
, 2);
2704 GEN8_IRQ_INIT_NDX(GT
, 3);
2706 for_each_pipe(pipe
) {
2707 GEN8_IRQ_INIT_NDX(DE_PIPE
, pipe
);
2710 GEN8_IRQ_INIT(DE_PORT
);
2711 GEN8_IRQ_INIT(DE_MISC
);
2713 #undef GEN8_IRQ_INIT
2714 #undef GEN8_IRQ_INIT_NDX
2716 POSTING_READ(GEN8_PCU_IIR
);
2719 static void ibx_hpd_irq_setup(struct drm_device
*dev
)
2721 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2722 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
2723 struct intel_encoder
*intel_encoder
;
2724 u32 hotplug_irqs
, hotplug
, enabled_irqs
= 0;
2726 if (HAS_PCH_IBX(dev
)) {
2727 hotplug_irqs
= SDE_HOTPLUG_MASK
;
2728 list_for_each_entry(intel_encoder
, &mode_config
->encoder_list
, base
.head
)
2729 if (dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_ENABLED
)
2730 enabled_irqs
|= hpd_ibx
[intel_encoder
->hpd_pin
];
2732 hotplug_irqs
= SDE_HOTPLUG_MASK_CPT
;
2733 list_for_each_entry(intel_encoder
, &mode_config
->encoder_list
, base
.head
)
2734 if (dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_ENABLED
)
2735 enabled_irqs
|= hpd_cpt
[intel_encoder
->hpd_pin
];
2738 ibx_display_interrupt_update(dev_priv
, hotplug_irqs
, enabled_irqs
);
2741 * Enable digital hotplug on the PCH, and configure the DP short pulse
2742 * duration to 2ms (which is the minimum in the Display Port spec)
2744 * This register is the same on all known PCH chips.
2746 hotplug
= I915_READ(PCH_PORT_HOTPLUG
);
2747 hotplug
&= ~(PORTD_PULSE_DURATION_MASK
|PORTC_PULSE_DURATION_MASK
|PORTB_PULSE_DURATION_MASK
);
2748 hotplug
|= PORTD_HOTPLUG_ENABLE
| PORTD_PULSE_DURATION_2ms
;
2749 hotplug
|= PORTC_HOTPLUG_ENABLE
| PORTC_PULSE_DURATION_2ms
;
2750 hotplug
|= PORTB_HOTPLUG_ENABLE
| PORTB_PULSE_DURATION_2ms
;
2751 I915_WRITE(PCH_PORT_HOTPLUG
, hotplug
);
2754 static void ibx_irq_postinstall(struct drm_device
*dev
)
2756 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2759 if (HAS_PCH_NOP(dev
))
2762 if (HAS_PCH_IBX(dev
)) {
2763 mask
= SDE_GMBUS
| SDE_AUX_MASK
| SDE_TRANSB_FIFO_UNDER
|
2764 SDE_TRANSA_FIFO_UNDER
| SDE_POISON
;
2766 mask
= SDE_GMBUS_CPT
| SDE_AUX_MASK_CPT
| SDE_ERROR_CPT
;
2768 I915_WRITE(SERR_INT
, I915_READ(SERR_INT
));
2771 I915_WRITE(SDEIIR
, I915_READ(SDEIIR
));
2772 I915_WRITE(SDEIMR
, ~mask
);
2775 static void gen5_gt_irq_postinstall(struct drm_device
*dev
)
2777 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2778 u32 pm_irqs
, gt_irqs
;
2780 pm_irqs
= gt_irqs
= 0;
2782 dev_priv
->gt_irq_mask
= ~0;
2783 if (HAS_L3_DPF(dev
)) {
2784 /* L3 parity interrupt is always unmasked. */
2785 dev_priv
->gt_irq_mask
= ~GT_PARITY_ERROR(dev
);
2786 gt_irqs
|= GT_PARITY_ERROR(dev
);
2789 gt_irqs
|= GT_RENDER_USER_INTERRUPT
;
2791 gt_irqs
|= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
|
2792 ILK_BSD_USER_INTERRUPT
;
2794 gt_irqs
|= GT_BLT_USER_INTERRUPT
| GT_BSD_USER_INTERRUPT
;
2797 I915_WRITE(GTIIR
, I915_READ(GTIIR
));
2798 I915_WRITE(GTIMR
, dev_priv
->gt_irq_mask
);
2799 I915_WRITE(GTIER
, gt_irqs
);
2800 POSTING_READ(GTIER
);
2802 if (INTEL_INFO(dev
)->gen
>= 6) {
2803 pm_irqs
|= GEN6_PM_RPS_EVENTS
;
2806 pm_irqs
|= PM_VEBOX_USER_INTERRUPT
;
2808 dev_priv
->pm_irq_mask
= 0xffffffff;
2809 I915_WRITE(GEN6_PMIIR
, I915_READ(GEN6_PMIIR
));
2810 I915_WRITE(GEN6_PMIMR
, dev_priv
->pm_irq_mask
);
2811 I915_WRITE(GEN6_PMIER
, pm_irqs
);
2812 POSTING_READ(GEN6_PMIER
);
2816 static int ironlake_irq_postinstall(struct drm_device
*dev
)
2818 unsigned long irqflags
;
2819 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2820 u32 display_mask
, extra_mask
;
2822 if (INTEL_INFO(dev
)->gen
>= 7) {
2823 display_mask
= (DE_MASTER_IRQ_CONTROL
| DE_GSE_IVB
|
2824 DE_PCH_EVENT_IVB
| DE_PLANEC_FLIP_DONE_IVB
|
2825 DE_PLANEB_FLIP_DONE_IVB
|
2826 DE_PLANEA_FLIP_DONE_IVB
| DE_AUX_CHANNEL_A_IVB
|
2828 extra_mask
= (DE_PIPEC_VBLANK_IVB
| DE_PIPEB_VBLANK_IVB
|
2829 DE_PIPEA_VBLANK_IVB
);
2831 I915_WRITE(GEN7_ERR_INT
, I915_READ(GEN7_ERR_INT
));
2833 display_mask
= (DE_MASTER_IRQ_CONTROL
| DE_GSE
| DE_PCH_EVENT
|
2834 DE_PLANEA_FLIP_DONE
| DE_PLANEB_FLIP_DONE
|
2836 DE_PIPEB_FIFO_UNDERRUN
| DE_PIPEA_FIFO_UNDERRUN
|
2837 DE_PIPEB_CRC_DONE
| DE_PIPEA_CRC_DONE
|
2839 extra_mask
= DE_PIPEA_VBLANK
| DE_PIPEB_VBLANK
| DE_PCU_EVENT
;
2842 dev_priv
->irq_mask
= ~display_mask
;
2844 /* should always can generate irq */
2845 I915_WRITE(DEIIR
, I915_READ(DEIIR
));
2846 I915_WRITE(DEIMR
, dev_priv
->irq_mask
);
2847 I915_WRITE(DEIER
, display_mask
| extra_mask
);
2848 POSTING_READ(DEIER
);
2850 gen5_gt_irq_postinstall(dev
);
2852 ibx_irq_postinstall(dev
);
2854 if (IS_IRONLAKE_M(dev
)) {
2855 /* Enable PCU event interrupts
2857 * spinlocking not required here for correctness since interrupt
2858 * setup is guaranteed to run in single-threaded context. But we
2859 * need it to make the assert_spin_locked happy. */
2860 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2861 ironlake_enable_display_irq(dev_priv
, DE_PCU_EVENT
);
2862 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2868 static int valleyview_irq_postinstall(struct drm_device
*dev
)
2870 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2872 u32 pipestat_enable
= PLANE_FLIP_DONE_INT_EN_VLV
|
2873 PIPE_CRC_DONE_ENABLE
;
2874 unsigned long irqflags
;
2876 enable_mask
= I915_DISPLAY_PORT_INTERRUPT
;
2877 enable_mask
|= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
2878 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT
|
2879 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
2880 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT
;
2883 *Leave vblank interrupts masked initially. enable/disable will
2884 * toggle them based on usage.
2886 dev_priv
->irq_mask
= (~enable_mask
) |
2887 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT
|
2888 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT
;
2890 I915_WRITE(PORT_HOTPLUG_EN
, 0);
2891 POSTING_READ(PORT_HOTPLUG_EN
);
2893 I915_WRITE(VLV_IMR
, dev_priv
->irq_mask
);
2894 I915_WRITE(VLV_IER
, enable_mask
);
2895 I915_WRITE(VLV_IIR
, 0xffffffff);
2896 I915_WRITE(PIPESTAT(0), 0xffff);
2897 I915_WRITE(PIPESTAT(1), 0xffff);
2898 POSTING_READ(VLV_IER
);
2900 /* Interrupt setup is already guaranteed to be single-threaded, this is
2901 * just to make the assert_spin_locked check happy. */
2902 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2903 i915_enable_pipestat(dev_priv
, PIPE_A
, pipestat_enable
);
2904 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_GMBUS_EVENT_ENABLE
);
2905 i915_enable_pipestat(dev_priv
, PIPE_B
, pipestat_enable
);
2906 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2908 I915_WRITE(VLV_IIR
, 0xffffffff);
2909 I915_WRITE(VLV_IIR
, 0xffffffff);
2911 gen5_gt_irq_postinstall(dev
);
2913 /* ack & enable invalid PTE error interrupts */
2914 #if 0 /* FIXME: add support to irq handler for checking these bits */
2915 I915_WRITE(DPINVGTT
, DPINVGTT_STATUS_MASK
);
2916 I915_WRITE(DPINVGTT
, DPINVGTT_EN_MASK
);
2919 I915_WRITE(VLV_MASTER_IER
, MASTER_INTERRUPT_ENABLE
);
2924 static void gen8_gt_irq_postinstall(struct drm_i915_private
*dev_priv
)
2928 /* These are interrupts we'll toggle with the ring mask register */
2929 uint32_t gt_interrupts
[] = {
2930 GT_RENDER_USER_INTERRUPT
<< GEN8_RCS_IRQ_SHIFT
|
2931 GT_RENDER_L3_PARITY_ERROR_INTERRUPT
|
2932 GT_RENDER_USER_INTERRUPT
<< GEN8_BCS_IRQ_SHIFT
,
2933 GT_RENDER_USER_INTERRUPT
<< GEN8_VCS1_IRQ_SHIFT
|
2934 GT_RENDER_USER_INTERRUPT
<< GEN8_VCS2_IRQ_SHIFT
,
2936 GT_RENDER_USER_INTERRUPT
<< GEN8_VECS_IRQ_SHIFT
2939 for (i
= 0; i
< ARRAY_SIZE(gt_interrupts
); i
++) {
2940 u32 tmp
= I915_READ(GEN8_GT_IIR(i
));
2942 DRM_ERROR("Interrupt (%d) should have been masked in pre-install 0x%08x\n",
2944 I915_WRITE(GEN8_GT_IMR(i
), ~gt_interrupts
[i
]);
2945 I915_WRITE(GEN8_GT_IER(i
), gt_interrupts
[i
]);
2947 POSTING_READ(GEN8_GT_IER(0));
2950 static void gen8_de_irq_postinstall(struct drm_i915_private
*dev_priv
)
2952 struct drm_device
*dev
= dev_priv
->dev
;
2953 uint32_t de_pipe_masked
= GEN8_PIPE_FLIP_DONE
|
2954 GEN8_PIPE_CDCLK_CRC_DONE
|
2955 GEN8_PIPE_FIFO_UNDERRUN
|
2956 GEN8_DE_PIPE_IRQ_FAULT_ERRORS
;
2957 uint32_t de_pipe_enables
= de_pipe_masked
| GEN8_PIPE_VBLANK
;
2959 dev_priv
->de_irq_mask
[PIPE_A
] = ~de_pipe_masked
;
2960 dev_priv
->de_irq_mask
[PIPE_B
] = ~de_pipe_masked
;
2961 dev_priv
->de_irq_mask
[PIPE_C
] = ~de_pipe_masked
;
2963 for_each_pipe(pipe
) {
2964 u32 tmp
= I915_READ(GEN8_DE_PIPE_IIR(pipe
));
2966 DRM_ERROR("Interrupt (%d) should have been masked in pre-install 0x%08x\n",
2968 I915_WRITE(GEN8_DE_PIPE_IMR(pipe
), dev_priv
->de_irq_mask
[pipe
]);
2969 I915_WRITE(GEN8_DE_PIPE_IER(pipe
), de_pipe_enables
);
2971 POSTING_READ(GEN8_DE_PIPE_ISR(0));
2973 I915_WRITE(GEN8_DE_PORT_IMR
, ~GEN8_AUX_CHANNEL_A
);
2974 I915_WRITE(GEN8_DE_PORT_IER
, GEN8_AUX_CHANNEL_A
);
2975 POSTING_READ(GEN8_DE_PORT_IER
);
2978 static int gen8_irq_postinstall(struct drm_device
*dev
)
2980 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2982 gen8_gt_irq_postinstall(dev_priv
);
2983 gen8_de_irq_postinstall(dev_priv
);
2985 ibx_irq_postinstall(dev
);
2987 I915_WRITE(GEN8_MASTER_IRQ
, DE_MASTER_IRQ_CONTROL
);
2988 POSTING_READ(GEN8_MASTER_IRQ
);
2993 static void gen8_irq_uninstall(struct drm_device
*dev
)
2995 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3001 atomic_set(&dev_priv
->irq_received
, 0);
3003 I915_WRITE(GEN8_MASTER_IRQ
, 0);
3005 #define GEN8_IRQ_FINI_NDX(type, which) do { \
3006 I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
3007 I915_WRITE(GEN8_##type##_IER(which), 0); \
3008 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
3011 #define GEN8_IRQ_FINI(type) do { \
3012 I915_WRITE(GEN8_##type##_IMR, 0xffffffff); \
3013 I915_WRITE(GEN8_##type##_IER, 0); \
3014 I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \
3017 GEN8_IRQ_FINI_NDX(GT
, 0);
3018 GEN8_IRQ_FINI_NDX(GT
, 1);
3019 GEN8_IRQ_FINI_NDX(GT
, 2);
3020 GEN8_IRQ_FINI_NDX(GT
, 3);
3022 for_each_pipe(pipe
) {
3023 GEN8_IRQ_FINI_NDX(DE_PIPE
, pipe
);
3026 GEN8_IRQ_FINI(DE_PORT
);
3027 GEN8_IRQ_FINI(DE_MISC
);
3029 #undef GEN8_IRQ_FINI
3030 #undef GEN8_IRQ_FINI_NDX
3032 POSTING_READ(GEN8_PCU_IIR
);
3035 static void valleyview_irq_uninstall(struct drm_device
*dev
)
3037 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3043 del_timer_sync(&dev_priv
->hotplug_reenable_timer
);
3046 I915_WRITE(PIPESTAT(pipe
), 0xffff);
3048 I915_WRITE(HWSTAM
, 0xffffffff);
3049 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3050 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
3052 I915_WRITE(PIPESTAT(pipe
), 0xffff);
3053 I915_WRITE(VLV_IIR
, 0xffffffff);
3054 I915_WRITE(VLV_IMR
, 0xffffffff);
3055 I915_WRITE(VLV_IER
, 0x0);
3056 POSTING_READ(VLV_IER
);
3059 static void ironlake_irq_uninstall(struct drm_device
*dev
)
3061 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3066 del_timer_sync(&dev_priv
->hotplug_reenable_timer
);
3068 I915_WRITE(HWSTAM
, 0xffffffff);
3070 I915_WRITE(DEIMR
, 0xffffffff);
3071 I915_WRITE(DEIER
, 0x0);
3072 I915_WRITE(DEIIR
, I915_READ(DEIIR
));
3074 I915_WRITE(GEN7_ERR_INT
, I915_READ(GEN7_ERR_INT
));
3076 I915_WRITE(GTIMR
, 0xffffffff);
3077 I915_WRITE(GTIER
, 0x0);
3078 I915_WRITE(GTIIR
, I915_READ(GTIIR
));
3080 if (HAS_PCH_NOP(dev
))
3083 I915_WRITE(SDEIMR
, 0xffffffff);
3084 I915_WRITE(SDEIER
, 0x0);
3085 I915_WRITE(SDEIIR
, I915_READ(SDEIIR
));
3086 if (HAS_PCH_CPT(dev
) || HAS_PCH_LPT(dev
))
3087 I915_WRITE(SERR_INT
, I915_READ(SERR_INT
));
3090 static void i8xx_irq_preinstall(struct drm_device
* dev
)
3092 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3095 atomic_set(&dev_priv
->irq_received
, 0);
3098 I915_WRITE(PIPESTAT(pipe
), 0);
3099 I915_WRITE16(IMR
, 0xffff);
3100 I915_WRITE16(IER
, 0x0);
3101 POSTING_READ16(IER
);
3104 static int i8xx_irq_postinstall(struct drm_device
*dev
)
3106 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3107 unsigned long irqflags
;
3110 ~(I915_ERROR_PAGE_TABLE
| I915_ERROR_MEMORY_REFRESH
));
3112 /* Unmask the interrupts that we always want on. */
3113 dev_priv
->irq_mask
=
3114 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3115 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
3116 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
3117 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
|
3118 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
3119 I915_WRITE16(IMR
, dev_priv
->irq_mask
);
3122 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3123 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
3124 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
|
3125 I915_USER_INTERRUPT
);
3126 POSTING_READ16(IER
);
3128 /* Interrupt setup is already guaranteed to be single-threaded, this is
3129 * just to make the assert_spin_locked check happy. */
3130 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3131 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_CRC_DONE_ENABLE
);
3132 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_CRC_DONE_ENABLE
);
3133 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3139 * Returns true when a page flip has completed.
3141 static bool i8xx_handle_vblank(struct drm_device
*dev
,
3142 int plane
, int pipe
, u32 iir
)
3144 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3145 u16 flip_pending
= DISPLAY_PLANE_FLIP_PENDING(plane
);
3147 if (!drm_handle_vblank(dev
, pipe
))
3150 if ((iir
& flip_pending
) == 0)
3153 intel_prepare_page_flip(dev
, plane
);
3155 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3156 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3157 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3158 * the flip is completed (no longer pending). Since this doesn't raise
3159 * an interrupt per se, we watch for the change at vblank.
3161 if (I915_READ16(ISR
) & flip_pending
)
3164 intel_finish_page_flip(dev
, pipe
);
3169 static irqreturn_t
i8xx_irq_handler(int irq
, void *arg
)
3171 struct drm_device
*dev
= (struct drm_device
*) arg
;
3172 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3175 unsigned long irqflags
;
3178 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
3179 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
3181 atomic_inc(&dev_priv
->irq_received
);
3183 iir
= I915_READ16(IIR
);
3187 while (iir
& ~flip_mask
) {
3188 /* Can't rely on pipestat interrupt bit in iir as it might
3189 * have been cleared after the pipestat interrupt was received.
3190 * It doesn't set the bit in iir again, but it still produces
3191 * interrupts (for non-MSI).
3193 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3194 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
3195 i915_handle_error(dev
, false);
3197 for_each_pipe(pipe
) {
3198 int reg
= PIPESTAT(pipe
);
3199 pipe_stats
[pipe
] = I915_READ(reg
);
3202 * Clear the PIPE*STAT regs before the IIR
3204 if (pipe_stats
[pipe
] & 0x8000ffff) {
3205 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
3206 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3208 I915_WRITE(reg
, pipe_stats
[pipe
]);
3211 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3213 I915_WRITE16(IIR
, iir
& ~flip_mask
);
3214 new_iir
= I915_READ16(IIR
); /* Flush posted writes */
3216 i915_update_dri1_breadcrumb(dev
);
3218 if (iir
& I915_USER_INTERRUPT
)
3219 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
3221 for_each_pipe(pipe
) {
3226 if (pipe_stats
[pipe
] & PIPE_VBLANK_INTERRUPT_STATUS
&&
3227 i8xx_handle_vblank(dev
, plane
, pipe
, iir
))
3228 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(plane
);
3230 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
3231 i9xx_pipe_crc_irq_handler(dev
, pipe
);
3240 static void i8xx_irq_uninstall(struct drm_device
* dev
)
3242 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3245 for_each_pipe(pipe
) {
3246 /* Clear enable bits; then clear status bits */
3247 I915_WRITE(PIPESTAT(pipe
), 0);
3248 I915_WRITE(PIPESTAT(pipe
), I915_READ(PIPESTAT(pipe
)));
3250 I915_WRITE16(IMR
, 0xffff);
3251 I915_WRITE16(IER
, 0x0);
3252 I915_WRITE16(IIR
, I915_READ16(IIR
));
3255 static void i915_irq_preinstall(struct drm_device
* dev
)
3257 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3260 atomic_set(&dev_priv
->irq_received
, 0);
3262 if (I915_HAS_HOTPLUG(dev
)) {
3263 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3264 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
3267 I915_WRITE16(HWSTAM
, 0xeffe);
3269 I915_WRITE(PIPESTAT(pipe
), 0);
3270 I915_WRITE(IMR
, 0xffffffff);
3271 I915_WRITE(IER
, 0x0);
3275 static int i915_irq_postinstall(struct drm_device
*dev
)
3277 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3279 unsigned long irqflags
;
3281 I915_WRITE(EMR
, ~(I915_ERROR_PAGE_TABLE
| I915_ERROR_MEMORY_REFRESH
));
3283 /* Unmask the interrupts that we always want on. */
3284 dev_priv
->irq_mask
=
3285 ~(I915_ASLE_INTERRUPT
|
3286 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3287 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
3288 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
3289 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
|
3290 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
3293 I915_ASLE_INTERRUPT
|
3294 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3295 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
3296 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
|
3297 I915_USER_INTERRUPT
;
3299 if (I915_HAS_HOTPLUG(dev
)) {
3300 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3301 POSTING_READ(PORT_HOTPLUG_EN
);
3303 /* Enable in IER... */
3304 enable_mask
|= I915_DISPLAY_PORT_INTERRUPT
;
3305 /* and unmask in IMR */
3306 dev_priv
->irq_mask
&= ~I915_DISPLAY_PORT_INTERRUPT
;
3309 I915_WRITE(IMR
, dev_priv
->irq_mask
);
3310 I915_WRITE(IER
, enable_mask
);
3313 i915_enable_asle_pipestat(dev
);
3315 /* Interrupt setup is already guaranteed to be single-threaded, this is
3316 * just to make the assert_spin_locked check happy. */
3317 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3318 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_CRC_DONE_ENABLE
);
3319 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_CRC_DONE_ENABLE
);
3320 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3326 * Returns true when a page flip has completed.
3328 static bool i915_handle_vblank(struct drm_device
*dev
,
3329 int plane
, int pipe
, u32 iir
)
3331 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
3332 u32 flip_pending
= DISPLAY_PLANE_FLIP_PENDING(plane
);
3334 if (!drm_handle_vblank(dev
, pipe
))
3337 if ((iir
& flip_pending
) == 0)
3340 intel_prepare_page_flip(dev
, plane
);
3342 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3343 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3344 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3345 * the flip is completed (no longer pending). Since this doesn't raise
3346 * an interrupt per se, we watch for the change at vblank.
3348 if (I915_READ(ISR
) & flip_pending
)
3351 intel_finish_page_flip(dev
, pipe
);
3356 static irqreturn_t
i915_irq_handler(int irq
, void *arg
)
3358 struct drm_device
*dev
= (struct drm_device
*) arg
;
3359 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3360 u32 iir
, new_iir
, pipe_stats
[I915_MAX_PIPES
];
3361 unsigned long irqflags
;
3363 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
3364 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
3365 int pipe
, ret
= IRQ_NONE
;
3367 atomic_inc(&dev_priv
->irq_received
);
3369 iir
= I915_READ(IIR
);
3371 bool irq_received
= (iir
& ~flip_mask
) != 0;
3372 bool blc_event
= false;
3374 /* Can't rely on pipestat interrupt bit in iir as it might
3375 * have been cleared after the pipestat interrupt was received.
3376 * It doesn't set the bit in iir again, but it still produces
3377 * interrupts (for non-MSI).
3379 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3380 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
3381 i915_handle_error(dev
, false);
3383 for_each_pipe(pipe
) {
3384 int reg
= PIPESTAT(pipe
);
3385 pipe_stats
[pipe
] = I915_READ(reg
);
3387 /* Clear the PIPE*STAT regs before the IIR */
3388 if (pipe_stats
[pipe
] & 0x8000ffff) {
3389 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
3390 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3392 I915_WRITE(reg
, pipe_stats
[pipe
]);
3393 irq_received
= true;
3396 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3401 /* Consume port. Then clear IIR or we'll miss events */
3402 if ((I915_HAS_HOTPLUG(dev
)) &&
3403 (iir
& I915_DISPLAY_PORT_INTERRUPT
)) {
3404 u32 hotplug_status
= I915_READ(PORT_HOTPLUG_STAT
);
3405 u32 hotplug_trigger
= hotplug_status
& HOTPLUG_INT_STATUS_I915
;
3407 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
3410 intel_hpd_irq_handler(dev
, hotplug_trigger
, hpd_status_i915
);
3412 I915_WRITE(PORT_HOTPLUG_STAT
, hotplug_status
);
3413 POSTING_READ(PORT_HOTPLUG_STAT
);
3416 I915_WRITE(IIR
, iir
& ~flip_mask
);
3417 new_iir
= I915_READ(IIR
); /* Flush posted writes */
3419 if (iir
& I915_USER_INTERRUPT
)
3420 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
3422 for_each_pipe(pipe
) {
3427 if (pipe_stats
[pipe
] & PIPE_VBLANK_INTERRUPT_STATUS
&&
3428 i915_handle_vblank(dev
, plane
, pipe
, iir
))
3429 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(plane
);
3431 if (pipe_stats
[pipe
] & PIPE_LEGACY_BLC_EVENT_STATUS
)
3434 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
3435 i9xx_pipe_crc_irq_handler(dev
, pipe
);
3438 if (blc_event
|| (iir
& I915_ASLE_INTERRUPT
))
3439 intel_opregion_asle_intr(dev
);
3441 /* With MSI, interrupts are only generated when iir
3442 * transitions from zero to nonzero. If another bit got
3443 * set while we were handling the existing iir bits, then
3444 * we would never get another interrupt.
3446 * This is fine on non-MSI as well, as if we hit this path
3447 * we avoid exiting the interrupt handler only to generate
3450 * Note that for MSI this could cause a stray interrupt report
3451 * if an interrupt landed in the time between writing IIR and
3452 * the posting read. This should be rare enough to never
3453 * trigger the 99% of 100,000 interrupts test for disabling
3458 } while (iir
& ~flip_mask
);
3460 i915_update_dri1_breadcrumb(dev
);
3465 static void i915_irq_uninstall(struct drm_device
* dev
)
3467 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3470 del_timer_sync(&dev_priv
->hotplug_reenable_timer
);
3472 if (I915_HAS_HOTPLUG(dev
)) {
3473 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3474 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
3477 I915_WRITE16(HWSTAM
, 0xffff);
3478 for_each_pipe(pipe
) {
3479 /* Clear enable bits; then clear status bits */
3480 I915_WRITE(PIPESTAT(pipe
), 0);
3481 I915_WRITE(PIPESTAT(pipe
), I915_READ(PIPESTAT(pipe
)));
3483 I915_WRITE(IMR
, 0xffffffff);
3484 I915_WRITE(IER
, 0x0);
3486 I915_WRITE(IIR
, I915_READ(IIR
));
3489 static void i965_irq_preinstall(struct drm_device
* dev
)
3491 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3494 atomic_set(&dev_priv
->irq_received
, 0);
3496 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3497 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
3499 I915_WRITE(HWSTAM
, 0xeffe);
3501 I915_WRITE(PIPESTAT(pipe
), 0);
3502 I915_WRITE(IMR
, 0xffffffff);
3503 I915_WRITE(IER
, 0x0);
3507 static int i965_irq_postinstall(struct drm_device
*dev
)
3509 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3512 unsigned long irqflags
;
3514 /* Unmask the interrupts that we always want on. */
3515 dev_priv
->irq_mask
= ~(I915_ASLE_INTERRUPT
|
3516 I915_DISPLAY_PORT_INTERRUPT
|
3517 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3518 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
3519 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
3520 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
|
3521 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
3523 enable_mask
= ~dev_priv
->irq_mask
;
3524 enable_mask
&= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
3525 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
);
3526 enable_mask
|= I915_USER_INTERRUPT
;
3529 enable_mask
|= I915_BSD_USER_INTERRUPT
;
3531 /* Interrupt setup is already guaranteed to be single-threaded, this is
3532 * just to make the assert_spin_locked check happy. */
3533 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3534 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_GMBUS_EVENT_ENABLE
);
3535 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_CRC_DONE_ENABLE
);
3536 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_CRC_DONE_ENABLE
);
3537 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3540 * Enable some error detection, note the instruction error mask
3541 * bit is reserved, so we leave it masked.
3544 error_mask
= ~(GM45_ERROR_PAGE_TABLE
|
3545 GM45_ERROR_MEM_PRIV
|
3546 GM45_ERROR_CP_PRIV
|
3547 I915_ERROR_MEMORY_REFRESH
);
3549 error_mask
= ~(I915_ERROR_PAGE_TABLE
|
3550 I915_ERROR_MEMORY_REFRESH
);
3552 I915_WRITE(EMR
, error_mask
);
3554 I915_WRITE(IMR
, dev_priv
->irq_mask
);
3555 I915_WRITE(IER
, enable_mask
);
3558 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3559 POSTING_READ(PORT_HOTPLUG_EN
);
3561 i915_enable_asle_pipestat(dev
);
3566 static void i915_hpd_irq_setup(struct drm_device
*dev
)
3568 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3569 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
3570 struct intel_encoder
*intel_encoder
;
3573 assert_spin_locked(&dev_priv
->irq_lock
);
3575 if (I915_HAS_HOTPLUG(dev
)) {
3576 hotplug_en
= I915_READ(PORT_HOTPLUG_EN
);
3577 hotplug_en
&= ~HOTPLUG_INT_EN_MASK
;
3578 /* Note HDMI and DP share hotplug bits */
3579 /* enable bits are the same for all generations */
3580 list_for_each_entry(intel_encoder
, &mode_config
->encoder_list
, base
.head
)
3581 if (dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_ENABLED
)
3582 hotplug_en
|= hpd_mask_i915
[intel_encoder
->hpd_pin
];
3583 /* Programming the CRT detection parameters tends
3584 to generate a spurious hotplug event about three
3585 seconds later. So just do it once.
3588 hotplug_en
|= CRT_HOTPLUG_ACTIVATION_PERIOD_64
;
3589 hotplug_en
&= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK
;
3590 hotplug_en
|= CRT_HOTPLUG_VOLTAGE_COMPARE_50
;
3592 /* Ignore TV since it's buggy */
3593 I915_WRITE(PORT_HOTPLUG_EN
, hotplug_en
);
3597 static irqreturn_t
i965_irq_handler(int irq
, void *arg
)
3599 struct drm_device
*dev
= (struct drm_device
*) arg
;
3600 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3602 u32 pipe_stats
[I915_MAX_PIPES
];
3603 unsigned long irqflags
;
3605 int ret
= IRQ_NONE
, pipe
;
3607 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
3608 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
3610 atomic_inc(&dev_priv
->irq_received
);
3612 iir
= I915_READ(IIR
);
3615 bool blc_event
= false;
3617 irq_received
= (iir
& ~flip_mask
) != 0;
3619 /* Can't rely on pipestat interrupt bit in iir as it might
3620 * have been cleared after the pipestat interrupt was received.
3621 * It doesn't set the bit in iir again, but it still produces
3622 * interrupts (for non-MSI).
3624 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3625 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
3626 i915_handle_error(dev
, false);
3628 for_each_pipe(pipe
) {
3629 int reg
= PIPESTAT(pipe
);
3630 pipe_stats
[pipe
] = I915_READ(reg
);
3633 * Clear the PIPE*STAT regs before the IIR
3635 if (pipe_stats
[pipe
] & 0x8000ffff) {
3636 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
3637 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3639 I915_WRITE(reg
, pipe_stats
[pipe
]);
3643 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3650 /* Consume port. Then clear IIR or we'll miss events */
3651 if (iir
& I915_DISPLAY_PORT_INTERRUPT
) {
3652 u32 hotplug_status
= I915_READ(PORT_HOTPLUG_STAT
);
3653 u32 hotplug_trigger
= hotplug_status
& (IS_G4X(dev
) ?
3654 HOTPLUG_INT_STATUS_G4X
:
3655 HOTPLUG_INT_STATUS_I915
);
3657 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
3660 intel_hpd_irq_handler(dev
, hotplug_trigger
,
3661 IS_G4X(dev
) ? hpd_status_gen4
: hpd_status_i915
);
3664 (hotplug_status
& DP_AUX_CHANNEL_MASK_INT_STATUS_G4X
))
3665 dp_aux_irq_handler(dev
);
3667 I915_WRITE(PORT_HOTPLUG_STAT
, hotplug_status
);
3668 I915_READ(PORT_HOTPLUG_STAT
);
3671 I915_WRITE(IIR
, iir
& ~flip_mask
);
3672 new_iir
= I915_READ(IIR
); /* Flush posted writes */
3674 if (iir
& I915_USER_INTERRUPT
)
3675 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
3676 if (iir
& I915_BSD_USER_INTERRUPT
)
3677 notify_ring(dev
, &dev_priv
->ring
[VCS
]);
3679 for_each_pipe(pipe
) {
3680 if (pipe_stats
[pipe
] & PIPE_START_VBLANK_INTERRUPT_STATUS
&&
3681 i915_handle_vblank(dev
, pipe
, pipe
, iir
))
3682 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(pipe
);
3684 if (pipe_stats
[pipe
] & PIPE_LEGACY_BLC_EVENT_STATUS
)
3687 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
3688 i9xx_pipe_crc_irq_handler(dev
, pipe
);
3692 if (blc_event
|| (iir
& I915_ASLE_INTERRUPT
))
3693 intel_opregion_asle_intr(dev
);
3695 if (pipe_stats
[0] & PIPE_GMBUS_INTERRUPT_STATUS
)
3696 gmbus_irq_handler(dev
);
3698 /* With MSI, interrupts are only generated when iir
3699 * transitions from zero to nonzero. If another bit got
3700 * set while we were handling the existing iir bits, then
3701 * we would never get another interrupt.
3703 * This is fine on non-MSI as well, as if we hit this path
3704 * we avoid exiting the interrupt handler only to generate
3707 * Note that for MSI this could cause a stray interrupt report
3708 * if an interrupt landed in the time between writing IIR and
3709 * the posting read. This should be rare enough to never
3710 * trigger the 99% of 100,000 interrupts test for disabling
3716 i915_update_dri1_breadcrumb(dev
);
3721 static void i965_irq_uninstall(struct drm_device
* dev
)
3723 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3729 del_timer_sync(&dev_priv
->hotplug_reenable_timer
);
3731 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3732 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
3734 I915_WRITE(HWSTAM
, 0xffffffff);
3736 I915_WRITE(PIPESTAT(pipe
), 0);
3737 I915_WRITE(IMR
, 0xffffffff);
3738 I915_WRITE(IER
, 0x0);
3741 I915_WRITE(PIPESTAT(pipe
),
3742 I915_READ(PIPESTAT(pipe
)) & 0x8000ffff);
3743 I915_WRITE(IIR
, I915_READ(IIR
));
3746 static void i915_reenable_hotplug_timer_func(unsigned long data
)
3748 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*)data
;
3749 struct drm_device
*dev
= dev_priv
->dev
;
3750 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
3751 unsigned long irqflags
;
3754 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3755 for (i
= (HPD_NONE
+ 1); i
< HPD_NUM_PINS
; i
++) {
3756 struct drm_connector
*connector
;
3758 if (dev_priv
->hpd_stats
[i
].hpd_mark
!= HPD_DISABLED
)
3761 dev_priv
->hpd_stats
[i
].hpd_mark
= HPD_ENABLED
;
3763 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
3764 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
3766 if (intel_connector
->encoder
->hpd_pin
== i
) {
3767 if (connector
->polled
!= intel_connector
->polled
)
3768 DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
3769 drm_get_connector_name(connector
));
3770 connector
->polled
= intel_connector
->polled
;
3771 if (!connector
->polled
)
3772 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
3776 if (dev_priv
->display
.hpd_irq_setup
)
3777 dev_priv
->display
.hpd_irq_setup(dev
);
3778 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3781 void intel_irq_init(struct drm_device
*dev
)
3783 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3785 INIT_WORK(&dev_priv
->hotplug_work
, i915_hotplug_work_func
);
3786 INIT_WORK(&dev_priv
->gpu_error
.work
, i915_error_work_func
);
3787 INIT_WORK(&dev_priv
->rps
.work
, gen6_pm_rps_work
);
3788 INIT_WORK(&dev_priv
->l3_parity
.error_work
, ivybridge_parity_work
);
3790 setup_timer(&dev_priv
->gpu_error
.hangcheck_timer
,
3791 i915_hangcheck_elapsed
,
3792 (unsigned long) dev
);
3793 setup_timer(&dev_priv
->hotplug_reenable_timer
, i915_reenable_hotplug_timer_func
,
3794 (unsigned long) dev_priv
);
3796 pm_qos_add_request(&dev_priv
->pm_qos
, PM_QOS_CPU_DMA_LATENCY
, PM_QOS_DEFAULT_VALUE
);
3799 dev
->max_vblank_count
= 0;
3800 dev
->driver
->get_vblank_counter
= i8xx_get_vblank_counter
;
3801 } else if (IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
3802 dev
->max_vblank_count
= 0xffffffff; /* full 32 bit counter */
3803 dev
->driver
->get_vblank_counter
= gm45_get_vblank_counter
;
3805 dev
->driver
->get_vblank_counter
= i915_get_vblank_counter
;
3806 dev
->max_vblank_count
= 0xffffff; /* only 24 bits of frame count */
3809 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
3810 dev
->driver
->get_vblank_timestamp
= i915_get_vblank_timestamp
;
3811 dev
->driver
->get_scanout_position
= i915_get_crtc_scanoutpos
;
3814 if (IS_VALLEYVIEW(dev
)) {
3815 dev
->driver
->irq_handler
= valleyview_irq_handler
;
3816 dev
->driver
->irq_preinstall
= valleyview_irq_preinstall
;
3817 dev
->driver
->irq_postinstall
= valleyview_irq_postinstall
;
3818 dev
->driver
->irq_uninstall
= valleyview_irq_uninstall
;
3819 dev
->driver
->enable_vblank
= valleyview_enable_vblank
;
3820 dev
->driver
->disable_vblank
= valleyview_disable_vblank
;
3821 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
3822 } else if (IS_GEN8(dev
)) {
3823 dev
->driver
->irq_handler
= gen8_irq_handler
;
3824 dev
->driver
->irq_preinstall
= gen8_irq_preinstall
;
3825 dev
->driver
->irq_postinstall
= gen8_irq_postinstall
;
3826 dev
->driver
->irq_uninstall
= gen8_irq_uninstall
;
3827 dev
->driver
->enable_vblank
= gen8_enable_vblank
;
3828 dev
->driver
->disable_vblank
= gen8_disable_vblank
;
3829 dev_priv
->display
.hpd_irq_setup
= ibx_hpd_irq_setup
;
3830 } else if (HAS_PCH_SPLIT(dev
)) {
3831 dev
->driver
->irq_handler
= ironlake_irq_handler
;
3832 dev
->driver
->irq_preinstall
= ironlake_irq_preinstall
;
3833 dev
->driver
->irq_postinstall
= ironlake_irq_postinstall
;
3834 dev
->driver
->irq_uninstall
= ironlake_irq_uninstall
;
3835 dev
->driver
->enable_vblank
= ironlake_enable_vblank
;
3836 dev
->driver
->disable_vblank
= ironlake_disable_vblank
;
3837 dev_priv
->display
.hpd_irq_setup
= ibx_hpd_irq_setup
;
3839 if (INTEL_INFO(dev
)->gen
== 2) {
3840 dev
->driver
->irq_preinstall
= i8xx_irq_preinstall
;
3841 dev
->driver
->irq_postinstall
= i8xx_irq_postinstall
;
3842 dev
->driver
->irq_handler
= i8xx_irq_handler
;
3843 dev
->driver
->irq_uninstall
= i8xx_irq_uninstall
;
3844 } else if (INTEL_INFO(dev
)->gen
== 3) {
3845 dev
->driver
->irq_preinstall
= i915_irq_preinstall
;
3846 dev
->driver
->irq_postinstall
= i915_irq_postinstall
;
3847 dev
->driver
->irq_uninstall
= i915_irq_uninstall
;
3848 dev
->driver
->irq_handler
= i915_irq_handler
;
3849 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
3851 dev
->driver
->irq_preinstall
= i965_irq_preinstall
;
3852 dev
->driver
->irq_postinstall
= i965_irq_postinstall
;
3853 dev
->driver
->irq_uninstall
= i965_irq_uninstall
;
3854 dev
->driver
->irq_handler
= i965_irq_handler
;
3855 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
3857 dev
->driver
->enable_vblank
= i915_enable_vblank
;
3858 dev
->driver
->disable_vblank
= i915_disable_vblank
;
3862 void intel_hpd_init(struct drm_device
*dev
)
3864 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3865 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
3866 struct drm_connector
*connector
;
3867 unsigned long irqflags
;
3870 for (i
= 1; i
< HPD_NUM_PINS
; i
++) {
3871 dev_priv
->hpd_stats
[i
].hpd_cnt
= 0;
3872 dev_priv
->hpd_stats
[i
].hpd_mark
= HPD_ENABLED
;
3874 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
3875 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
3876 connector
->polled
= intel_connector
->polled
;
3877 if (!connector
->polled
&& I915_HAS_HOTPLUG(dev
) && intel_connector
->encoder
->hpd_pin
> HPD_NONE
)
3878 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
3881 /* Interrupt setup is already guaranteed to be single-threaded, this is
3882 * just to make the assert_spin_locked checks happy. */
3883 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3884 if (dev_priv
->display
.hpd_irq_setup
)
3885 dev_priv
->display
.hpd_irq_setup(dev
);
3886 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3889 /* Disable interrupts so we can allow Package C8+. */
3890 void hsw_pc8_disable_interrupts(struct drm_device
*dev
)
3892 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3893 unsigned long irqflags
;
3895 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3897 dev_priv
->pc8
.regsave
.deimr
= I915_READ(DEIMR
);
3898 dev_priv
->pc8
.regsave
.sdeimr
= I915_READ(SDEIMR
);
3899 dev_priv
->pc8
.regsave
.gtimr
= I915_READ(GTIMR
);
3900 dev_priv
->pc8
.regsave
.gtier
= I915_READ(GTIER
);
3901 dev_priv
->pc8
.regsave
.gen6_pmimr
= I915_READ(GEN6_PMIMR
);
3903 ironlake_disable_display_irq(dev_priv
, 0xffffffff);
3904 ibx_disable_display_interrupt(dev_priv
, 0xffffffff);
3905 ilk_disable_gt_irq(dev_priv
, 0xffffffff);
3906 snb_disable_pm_irq(dev_priv
, 0xffffffff);
3908 dev_priv
->pc8
.irqs_disabled
= true;
3910 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3913 /* Restore interrupts so we can recover from Package C8+. */
3914 void hsw_pc8_restore_interrupts(struct drm_device
*dev
)
3916 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3917 unsigned long irqflags
;
3920 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3922 val
= I915_READ(DEIMR
);
3923 WARN(val
!= 0xffffffff, "DEIMR is 0x%08x\n", val
);
3925 val
= I915_READ(SDEIMR
);
3926 WARN(val
!= 0xffffffff, "SDEIMR is 0x%08x\n", val
);
3928 val
= I915_READ(GTIMR
);
3929 WARN(val
!= 0xffffffff, "GTIMR is 0x%08x\n", val
);
3931 val
= I915_READ(GEN6_PMIMR
);
3932 WARN(val
!= 0xffffffff, "GEN6_PMIMR is 0x%08x\n", val
);
3934 dev_priv
->pc8
.irqs_disabled
= false;
3936 ironlake_enable_display_irq(dev_priv
, ~dev_priv
->pc8
.regsave
.deimr
);
3937 ibx_enable_display_interrupt(dev_priv
, ~dev_priv
->pc8
.regsave
.sdeimr
);
3938 ilk_enable_gt_irq(dev_priv
, ~dev_priv
->pc8
.regsave
.gtimr
);
3939 snb_enable_pm_irq(dev_priv
, ~dev_priv
->pc8
.regsave
.gen6_pmimr
);
3940 I915_WRITE(GTIER
, dev_priv
->pc8
.regsave
.gtier
);
3942 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);