1 /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/sysrq.h>
32 #include <linux/slab.h>
33 #include <linux/circ_buf.h>
35 #include <drm/i915_drm.h>
37 #include "i915_trace.h"
38 #include "intel_drv.h"
41 * DOC: interrupt handling
43 * These functions provide the basic support for enabling and disabling the
44 * interrupt handling support. There's a lot more functionality in i915_irq.c
45 * and related files, but that will be described in separate chapters.
48 static const u32 hpd_ilk
[HPD_NUM_PINS
] = {
49 [HPD_PORT_A
] = DE_DP_A_HOTPLUG
,
52 static const u32 hpd_ivb
[HPD_NUM_PINS
] = {
53 [HPD_PORT_A
] = DE_DP_A_HOTPLUG_IVB
,
56 static const u32 hpd_bdw
[HPD_NUM_PINS
] = {
57 [HPD_PORT_A
] = GEN8_PORT_DP_A_HOTPLUG
,
60 static const u32 hpd_ibx
[HPD_NUM_PINS
] = {
61 [HPD_CRT
] = SDE_CRT_HOTPLUG
,
62 [HPD_SDVO_B
] = SDE_SDVOB_HOTPLUG
,
63 [HPD_PORT_B
] = SDE_PORTB_HOTPLUG
,
64 [HPD_PORT_C
] = SDE_PORTC_HOTPLUG
,
65 [HPD_PORT_D
] = SDE_PORTD_HOTPLUG
68 static const u32 hpd_cpt
[HPD_NUM_PINS
] = {
69 [HPD_CRT
] = SDE_CRT_HOTPLUG_CPT
,
70 [HPD_SDVO_B
] = SDE_SDVOB_HOTPLUG_CPT
,
71 [HPD_PORT_B
] = SDE_PORTB_HOTPLUG_CPT
,
72 [HPD_PORT_C
] = SDE_PORTC_HOTPLUG_CPT
,
73 [HPD_PORT_D
] = SDE_PORTD_HOTPLUG_CPT
76 static const u32 hpd_spt
[HPD_NUM_PINS
] = {
77 [HPD_PORT_A
] = SDE_PORTA_HOTPLUG_SPT
,
78 [HPD_PORT_B
] = SDE_PORTB_HOTPLUG_CPT
,
79 [HPD_PORT_C
] = SDE_PORTC_HOTPLUG_CPT
,
80 [HPD_PORT_D
] = SDE_PORTD_HOTPLUG_CPT
,
81 [HPD_PORT_E
] = SDE_PORTE_HOTPLUG_SPT
84 static const u32 hpd_mask_i915
[HPD_NUM_PINS
] = {
85 [HPD_CRT
] = CRT_HOTPLUG_INT_EN
,
86 [HPD_SDVO_B
] = SDVOB_HOTPLUG_INT_EN
,
87 [HPD_SDVO_C
] = SDVOC_HOTPLUG_INT_EN
,
88 [HPD_PORT_B
] = PORTB_HOTPLUG_INT_EN
,
89 [HPD_PORT_C
] = PORTC_HOTPLUG_INT_EN
,
90 [HPD_PORT_D
] = PORTD_HOTPLUG_INT_EN
93 static const u32 hpd_status_g4x
[HPD_NUM_PINS
] = {
94 [HPD_CRT
] = CRT_HOTPLUG_INT_STATUS
,
95 [HPD_SDVO_B
] = SDVOB_HOTPLUG_INT_STATUS_G4X
,
96 [HPD_SDVO_C
] = SDVOC_HOTPLUG_INT_STATUS_G4X
,
97 [HPD_PORT_B
] = PORTB_HOTPLUG_INT_STATUS
,
98 [HPD_PORT_C
] = PORTC_HOTPLUG_INT_STATUS
,
99 [HPD_PORT_D
] = PORTD_HOTPLUG_INT_STATUS
102 static const u32 hpd_status_i915
[HPD_NUM_PINS
] = {
103 [HPD_CRT
] = CRT_HOTPLUG_INT_STATUS
,
104 [HPD_SDVO_B
] = SDVOB_HOTPLUG_INT_STATUS_I915
,
105 [HPD_SDVO_C
] = SDVOC_HOTPLUG_INT_STATUS_I915
,
106 [HPD_PORT_B
] = PORTB_HOTPLUG_INT_STATUS
,
107 [HPD_PORT_C
] = PORTC_HOTPLUG_INT_STATUS
,
108 [HPD_PORT_D
] = PORTD_HOTPLUG_INT_STATUS
112 static const u32 hpd_bxt
[HPD_NUM_PINS
] = {
113 [HPD_PORT_A
] = BXT_DE_PORT_HP_DDIA
,
114 [HPD_PORT_B
] = BXT_DE_PORT_HP_DDIB
,
115 [HPD_PORT_C
] = BXT_DE_PORT_HP_DDIC
118 /* IIR can theoretically queue up two events. Be paranoid. */
119 #define GEN8_IRQ_RESET_NDX(type, which) do { \
120 I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
121 POSTING_READ(GEN8_##type##_IMR(which)); \
122 I915_WRITE(GEN8_##type##_IER(which), 0); \
123 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
124 POSTING_READ(GEN8_##type##_IIR(which)); \
125 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
126 POSTING_READ(GEN8_##type##_IIR(which)); \
129 #define GEN5_IRQ_RESET(type) do { \
130 I915_WRITE(type##IMR, 0xffffffff); \
131 POSTING_READ(type##IMR); \
132 I915_WRITE(type##IER, 0); \
133 I915_WRITE(type##IIR, 0xffffffff); \
134 POSTING_READ(type##IIR); \
135 I915_WRITE(type##IIR, 0xffffffff); \
136 POSTING_READ(type##IIR); \
140 * We should clear IMR at preinstall/uninstall, and just check at postinstall.
142 static void gen5_assert_iir_is_zero(struct drm_i915_private
*dev_priv
,
145 u32 val
= I915_READ(reg
);
150 WARN(1, "Interrupt register 0x%x is not zero: 0x%08x\n",
151 i915_mmio_reg_offset(reg
), val
);
152 I915_WRITE(reg
, 0xffffffff);
154 I915_WRITE(reg
, 0xffffffff);
158 #define GEN8_IRQ_INIT_NDX(type, which, imr_val, ier_val) do { \
159 gen5_assert_iir_is_zero(dev_priv, GEN8_##type##_IIR(which)); \
160 I915_WRITE(GEN8_##type##_IER(which), (ier_val)); \
161 I915_WRITE(GEN8_##type##_IMR(which), (imr_val)); \
162 POSTING_READ(GEN8_##type##_IMR(which)); \
165 #define GEN5_IRQ_INIT(type, imr_val, ier_val) do { \
166 gen5_assert_iir_is_zero(dev_priv, type##IIR); \
167 I915_WRITE(type##IER, (ier_val)); \
168 I915_WRITE(type##IMR, (imr_val)); \
169 POSTING_READ(type##IMR); \
172 static void gen6_rps_irq_handler(struct drm_i915_private
*dev_priv
, u32 pm_iir
);
174 /* For display hotplug interrupt */
176 i915_hotplug_interrupt_update_locked(struct drm_i915_private
*dev_priv
,
182 assert_spin_locked(&dev_priv
->irq_lock
);
183 WARN_ON(bits
& ~mask
);
185 val
= I915_READ(PORT_HOTPLUG_EN
);
188 I915_WRITE(PORT_HOTPLUG_EN
, val
);
192 * i915_hotplug_interrupt_update - update hotplug interrupt enable
193 * @dev_priv: driver private
194 * @mask: bits to update
195 * @bits: bits to enable
196 * NOTE: the HPD enable bits are modified both inside and outside
197 * of an interrupt context. To avoid that read-modify-write cycles
198 * interfer, these bits are protected by a spinlock. Since this
199 * function is usually not called from a context where the lock is
200 * held already, this function acquires the lock itself. A non-locking
201 * version is also available.
203 void i915_hotplug_interrupt_update(struct drm_i915_private
*dev_priv
,
207 spin_lock_irq(&dev_priv
->irq_lock
);
208 i915_hotplug_interrupt_update_locked(dev_priv
, mask
, bits
);
209 spin_unlock_irq(&dev_priv
->irq_lock
);
213 * ilk_update_display_irq - update DEIMR
214 * @dev_priv: driver private
215 * @interrupt_mask: mask of interrupt bits to update
216 * @enabled_irq_mask: mask of interrupt bits to enable
218 void ilk_update_display_irq(struct drm_i915_private
*dev_priv
,
219 uint32_t interrupt_mask
,
220 uint32_t enabled_irq_mask
)
224 assert_spin_locked(&dev_priv
->irq_lock
);
226 WARN_ON(enabled_irq_mask
& ~interrupt_mask
);
228 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
231 new_val
= dev_priv
->irq_mask
;
232 new_val
&= ~interrupt_mask
;
233 new_val
|= (~enabled_irq_mask
& interrupt_mask
);
235 if (new_val
!= dev_priv
->irq_mask
) {
236 dev_priv
->irq_mask
= new_val
;
237 I915_WRITE(DEIMR
, dev_priv
->irq_mask
);
243 * ilk_update_gt_irq - update GTIMR
244 * @dev_priv: driver private
245 * @interrupt_mask: mask of interrupt bits to update
246 * @enabled_irq_mask: mask of interrupt bits to enable
248 static void ilk_update_gt_irq(struct drm_i915_private
*dev_priv
,
249 uint32_t interrupt_mask
,
250 uint32_t enabled_irq_mask
)
252 assert_spin_locked(&dev_priv
->irq_lock
);
254 WARN_ON(enabled_irq_mask
& ~interrupt_mask
);
256 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
259 dev_priv
->gt_irq_mask
&= ~interrupt_mask
;
260 dev_priv
->gt_irq_mask
|= (~enabled_irq_mask
& interrupt_mask
);
261 I915_WRITE(GTIMR
, dev_priv
->gt_irq_mask
);
265 void gen5_enable_gt_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
267 ilk_update_gt_irq(dev_priv
, mask
, mask
);
270 void gen5_disable_gt_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
272 ilk_update_gt_irq(dev_priv
, mask
, 0);
275 static i915_reg_t
gen6_pm_iir(struct drm_i915_private
*dev_priv
)
277 return INTEL_INFO(dev_priv
)->gen
>= 8 ? GEN8_GT_IIR(2) : GEN6_PMIIR
;
280 static i915_reg_t
gen6_pm_imr(struct drm_i915_private
*dev_priv
)
282 return INTEL_INFO(dev_priv
)->gen
>= 8 ? GEN8_GT_IMR(2) : GEN6_PMIMR
;
285 static i915_reg_t
gen6_pm_ier(struct drm_i915_private
*dev_priv
)
287 return INTEL_INFO(dev_priv
)->gen
>= 8 ? GEN8_GT_IER(2) : GEN6_PMIER
;
291 * snb_update_pm_irq - update GEN6_PMIMR
292 * @dev_priv: driver private
293 * @interrupt_mask: mask of interrupt bits to update
294 * @enabled_irq_mask: mask of interrupt bits to enable
296 static void snb_update_pm_irq(struct drm_i915_private
*dev_priv
,
297 uint32_t interrupt_mask
,
298 uint32_t enabled_irq_mask
)
302 WARN_ON(enabled_irq_mask
& ~interrupt_mask
);
304 assert_spin_locked(&dev_priv
->irq_lock
);
306 new_val
= dev_priv
->pm_irq_mask
;
307 new_val
&= ~interrupt_mask
;
308 new_val
|= (~enabled_irq_mask
& interrupt_mask
);
310 if (new_val
!= dev_priv
->pm_irq_mask
) {
311 dev_priv
->pm_irq_mask
= new_val
;
312 I915_WRITE(gen6_pm_imr(dev_priv
), dev_priv
->pm_irq_mask
);
313 POSTING_READ(gen6_pm_imr(dev_priv
));
317 void gen6_enable_pm_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
319 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
322 snb_update_pm_irq(dev_priv
, mask
, mask
);
325 static void __gen6_disable_pm_irq(struct drm_i915_private
*dev_priv
,
328 snb_update_pm_irq(dev_priv
, mask
, 0);
331 void gen6_disable_pm_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
333 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
336 __gen6_disable_pm_irq(dev_priv
, mask
);
339 void gen6_reset_rps_interrupts(struct drm_device
*dev
)
341 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
342 i915_reg_t reg
= gen6_pm_iir(dev_priv
);
344 spin_lock_irq(&dev_priv
->irq_lock
);
345 I915_WRITE(reg
, dev_priv
->pm_rps_events
);
346 I915_WRITE(reg
, dev_priv
->pm_rps_events
);
348 dev_priv
->rps
.pm_iir
= 0;
349 spin_unlock_irq(&dev_priv
->irq_lock
);
352 void gen6_enable_rps_interrupts(struct drm_device
*dev
)
354 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
356 spin_lock_irq(&dev_priv
->irq_lock
);
358 WARN_ON(dev_priv
->rps
.pm_iir
);
359 WARN_ON(I915_READ(gen6_pm_iir(dev_priv
)) & dev_priv
->pm_rps_events
);
360 dev_priv
->rps
.interrupts_enabled
= true;
361 I915_WRITE(gen6_pm_ier(dev_priv
), I915_READ(gen6_pm_ier(dev_priv
)) |
362 dev_priv
->pm_rps_events
);
363 gen6_enable_pm_irq(dev_priv
, dev_priv
->pm_rps_events
);
365 spin_unlock_irq(&dev_priv
->irq_lock
);
368 u32
gen6_sanitize_rps_pm_mask(struct drm_i915_private
*dev_priv
, u32 mask
)
371 * SNB,IVB can while VLV,CHV may hard hang on looping batchbuffer
372 * if GEN6_PM_UP_EI_EXPIRED is masked.
374 * TODO: verify if this can be reproduced on VLV,CHV.
376 if (INTEL_INFO(dev_priv
)->gen
<= 7 && !IS_HASWELL(dev_priv
))
377 mask
&= ~GEN6_PM_RP_UP_EI_EXPIRED
;
379 if (INTEL_INFO(dev_priv
)->gen
>= 8)
380 mask
&= ~GEN8_PMINTR_REDIRECT_TO_NON_DISP
;
385 void gen6_disable_rps_interrupts(struct drm_device
*dev
)
387 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
389 spin_lock_irq(&dev_priv
->irq_lock
);
390 dev_priv
->rps
.interrupts_enabled
= false;
391 spin_unlock_irq(&dev_priv
->irq_lock
);
393 cancel_work_sync(&dev_priv
->rps
.work
);
395 spin_lock_irq(&dev_priv
->irq_lock
);
397 I915_WRITE(GEN6_PMINTRMSK
, gen6_sanitize_rps_pm_mask(dev_priv
, ~0));
399 __gen6_disable_pm_irq(dev_priv
, dev_priv
->pm_rps_events
);
400 I915_WRITE(gen6_pm_ier(dev_priv
), I915_READ(gen6_pm_ier(dev_priv
)) &
401 ~dev_priv
->pm_rps_events
);
403 spin_unlock_irq(&dev_priv
->irq_lock
);
405 synchronize_irq(dev
->irq
);
409 * bdw_update_port_irq - update DE port interrupt
410 * @dev_priv: driver private
411 * @interrupt_mask: mask of interrupt bits to update
412 * @enabled_irq_mask: mask of interrupt bits to enable
414 static void bdw_update_port_irq(struct drm_i915_private
*dev_priv
,
415 uint32_t interrupt_mask
,
416 uint32_t enabled_irq_mask
)
421 assert_spin_locked(&dev_priv
->irq_lock
);
423 WARN_ON(enabled_irq_mask
& ~interrupt_mask
);
425 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
428 old_val
= I915_READ(GEN8_DE_PORT_IMR
);
431 new_val
&= ~interrupt_mask
;
432 new_val
|= (~enabled_irq_mask
& interrupt_mask
);
434 if (new_val
!= old_val
) {
435 I915_WRITE(GEN8_DE_PORT_IMR
, new_val
);
436 POSTING_READ(GEN8_DE_PORT_IMR
);
441 * bdw_update_pipe_irq - update DE pipe interrupt
442 * @dev_priv: driver private
443 * @pipe: pipe whose interrupt to update
444 * @interrupt_mask: mask of interrupt bits to update
445 * @enabled_irq_mask: mask of interrupt bits to enable
447 void bdw_update_pipe_irq(struct drm_i915_private
*dev_priv
,
449 uint32_t interrupt_mask
,
450 uint32_t enabled_irq_mask
)
454 assert_spin_locked(&dev_priv
->irq_lock
);
456 WARN_ON(enabled_irq_mask
& ~interrupt_mask
);
458 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
461 new_val
= dev_priv
->de_irq_mask
[pipe
];
462 new_val
&= ~interrupt_mask
;
463 new_val
|= (~enabled_irq_mask
& interrupt_mask
);
465 if (new_val
!= dev_priv
->de_irq_mask
[pipe
]) {
466 dev_priv
->de_irq_mask
[pipe
] = new_val
;
467 I915_WRITE(GEN8_DE_PIPE_IMR(pipe
), dev_priv
->de_irq_mask
[pipe
]);
468 POSTING_READ(GEN8_DE_PIPE_IMR(pipe
));
473 * ibx_display_interrupt_update - update SDEIMR
474 * @dev_priv: driver private
475 * @interrupt_mask: mask of interrupt bits to update
476 * @enabled_irq_mask: mask of interrupt bits to enable
478 void ibx_display_interrupt_update(struct drm_i915_private
*dev_priv
,
479 uint32_t interrupt_mask
,
480 uint32_t enabled_irq_mask
)
482 uint32_t sdeimr
= I915_READ(SDEIMR
);
483 sdeimr
&= ~interrupt_mask
;
484 sdeimr
|= (~enabled_irq_mask
& interrupt_mask
);
486 WARN_ON(enabled_irq_mask
& ~interrupt_mask
);
488 assert_spin_locked(&dev_priv
->irq_lock
);
490 if (WARN_ON(!intel_irqs_enabled(dev_priv
)))
493 I915_WRITE(SDEIMR
, sdeimr
);
494 POSTING_READ(SDEIMR
);
498 __i915_enable_pipestat(struct drm_i915_private
*dev_priv
, enum pipe pipe
,
499 u32 enable_mask
, u32 status_mask
)
501 i915_reg_t reg
= PIPESTAT(pipe
);
502 u32 pipestat
= I915_READ(reg
) & PIPESTAT_INT_ENABLE_MASK
;
504 assert_spin_locked(&dev_priv
->irq_lock
);
505 WARN_ON(!intel_irqs_enabled(dev_priv
));
507 if (WARN_ONCE(enable_mask
& ~PIPESTAT_INT_ENABLE_MASK
||
508 status_mask
& ~PIPESTAT_INT_STATUS_MASK
,
509 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
510 pipe_name(pipe
), enable_mask
, status_mask
))
513 if ((pipestat
& enable_mask
) == enable_mask
)
516 dev_priv
->pipestat_irq_mask
[pipe
] |= status_mask
;
518 /* Enable the interrupt, clear any pending status */
519 pipestat
|= enable_mask
| status_mask
;
520 I915_WRITE(reg
, pipestat
);
525 __i915_disable_pipestat(struct drm_i915_private
*dev_priv
, enum pipe pipe
,
526 u32 enable_mask
, u32 status_mask
)
528 i915_reg_t reg
= PIPESTAT(pipe
);
529 u32 pipestat
= I915_READ(reg
) & PIPESTAT_INT_ENABLE_MASK
;
531 assert_spin_locked(&dev_priv
->irq_lock
);
532 WARN_ON(!intel_irqs_enabled(dev_priv
));
534 if (WARN_ONCE(enable_mask
& ~PIPESTAT_INT_ENABLE_MASK
||
535 status_mask
& ~PIPESTAT_INT_STATUS_MASK
,
536 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
537 pipe_name(pipe
), enable_mask
, status_mask
))
540 if ((pipestat
& enable_mask
) == 0)
543 dev_priv
->pipestat_irq_mask
[pipe
] &= ~status_mask
;
545 pipestat
&= ~enable_mask
;
546 I915_WRITE(reg
, pipestat
);
550 static u32
vlv_get_pipestat_enable_mask(struct drm_device
*dev
, u32 status_mask
)
552 u32 enable_mask
= status_mask
<< 16;
555 * On pipe A we don't support the PSR interrupt yet,
556 * on pipe B and C the same bit MBZ.
558 if (WARN_ON_ONCE(status_mask
& PIPE_A_PSR_STATUS_VLV
))
561 * On pipe B and C we don't support the PSR interrupt yet, on pipe
562 * A the same bit is for perf counters which we don't use either.
564 if (WARN_ON_ONCE(status_mask
& PIPE_B_PSR_STATUS_VLV
))
567 enable_mask
&= ~(PIPE_FIFO_UNDERRUN_STATUS
|
568 SPRITE0_FLIP_DONE_INT_EN_VLV
|
569 SPRITE1_FLIP_DONE_INT_EN_VLV
);
570 if (status_mask
& SPRITE0_FLIP_DONE_INT_STATUS_VLV
)
571 enable_mask
|= SPRITE0_FLIP_DONE_INT_EN_VLV
;
572 if (status_mask
& SPRITE1_FLIP_DONE_INT_STATUS_VLV
)
573 enable_mask
|= SPRITE1_FLIP_DONE_INT_EN_VLV
;
579 i915_enable_pipestat(struct drm_i915_private
*dev_priv
, enum pipe pipe
,
584 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
585 enable_mask
= vlv_get_pipestat_enable_mask(dev_priv
->dev
,
588 enable_mask
= status_mask
<< 16;
589 __i915_enable_pipestat(dev_priv
, pipe
, enable_mask
, status_mask
);
593 i915_disable_pipestat(struct drm_i915_private
*dev_priv
, enum pipe pipe
,
598 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
599 enable_mask
= vlv_get_pipestat_enable_mask(dev_priv
->dev
,
602 enable_mask
= status_mask
<< 16;
603 __i915_disable_pipestat(dev_priv
, pipe
, enable_mask
, status_mask
);
607 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
610 static void i915_enable_asle_pipestat(struct drm_device
*dev
)
612 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
614 if (!dev_priv
->opregion
.asle
|| !IS_MOBILE(dev
))
617 spin_lock_irq(&dev_priv
->irq_lock
);
619 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_LEGACY_BLC_EVENT_STATUS
);
620 if (INTEL_INFO(dev
)->gen
>= 4)
621 i915_enable_pipestat(dev_priv
, PIPE_A
,
622 PIPE_LEGACY_BLC_EVENT_STATUS
);
624 spin_unlock_irq(&dev_priv
->irq_lock
);
628 * This timing diagram depicts the video signal in and
629 * around the vertical blanking period.
631 * Assumptions about the fictitious mode used in this example:
633 * vsync_start = vblank_start + 1
634 * vsync_end = vblank_start + 2
635 * vtotal = vblank_start + 3
638 * latch double buffered registers
639 * increment frame counter (ctg+)
640 * generate start of vblank interrupt (gen4+)
643 * | generate frame start interrupt (aka. vblank interrupt) (gmch)
644 * | may be shifted forward 1-3 extra lines via PIPECONF
646 * | | start of vsync:
647 * | | generate vsync interrupt
649 * ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx
650 * . \hs/ . \hs/ \hs/ \hs/ . \hs/
651 * ----va---> <-----------------vb--------------------> <--------va-------------
652 * | | <----vs-----> |
653 * -vbs-----> <---vbs+1---> <---vbs+2---> <-----0-----> <-----1-----> <-----2--- (scanline counter gen2)
654 * -vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2---> <-----0--- (scanline counter gen3+)
655 * -vbs-2---> <---vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2- (scanline counter hsw+ hdmi)
657 * last visible pixel first visible pixel
658 * | increment frame counter (gen3/4)
659 * pixel counter = vblank_start * htotal pixel counter = 0 (gen3/4)
661 * x = horizontal active
662 * _ = horizontal blanking
663 * hs = horizontal sync
664 * va = vertical active
665 * vb = vertical blanking
667 * vbs = vblank_start (number)
670 * - most events happen at the start of horizontal sync
671 * - frame start happens at the start of horizontal blank, 1-4 lines
672 * (depending on PIPECONF settings) after the start of vblank
673 * - gen3/4 pixel and frame counter are synchronized with the start
674 * of horizontal active on the first line of vertical active
677 static u32
i8xx_get_vblank_counter(struct drm_device
*dev
, unsigned int pipe
)
679 /* Gen2 doesn't have a hardware frame counter */
683 /* Called from drm generic code, passed a 'crtc', which
684 * we use as a pipe index
686 static u32
i915_get_vblank_counter(struct drm_device
*dev
, unsigned int pipe
)
688 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
689 i915_reg_t high_frame
, low_frame
;
690 u32 high1
, high2
, low
, pixel
, vbl_start
, hsync_start
, htotal
;
691 struct intel_crtc
*intel_crtc
=
692 to_intel_crtc(dev_priv
->pipe_to_crtc_mapping
[pipe
]);
693 const struct drm_display_mode
*mode
= &intel_crtc
->base
.hwmode
;
695 htotal
= mode
->crtc_htotal
;
696 hsync_start
= mode
->crtc_hsync_start
;
697 vbl_start
= mode
->crtc_vblank_start
;
698 if (mode
->flags
& DRM_MODE_FLAG_INTERLACE
)
699 vbl_start
= DIV_ROUND_UP(vbl_start
, 2);
701 /* Convert to pixel count */
704 /* Start of vblank event occurs at start of hsync */
705 vbl_start
-= htotal
- hsync_start
;
707 high_frame
= PIPEFRAME(pipe
);
708 low_frame
= PIPEFRAMEPIXEL(pipe
);
711 * High & low register fields aren't synchronized, so make sure
712 * we get a low value that's stable across two reads of the high
716 high1
= I915_READ(high_frame
) & PIPE_FRAME_HIGH_MASK
;
717 low
= I915_READ(low_frame
);
718 high2
= I915_READ(high_frame
) & PIPE_FRAME_HIGH_MASK
;
719 } while (high1
!= high2
);
721 high1
>>= PIPE_FRAME_HIGH_SHIFT
;
722 pixel
= low
& PIPE_PIXEL_MASK
;
723 low
>>= PIPE_FRAME_LOW_SHIFT
;
726 * The frame counter increments at beginning of active.
727 * Cook up a vblank counter by also checking the pixel
728 * counter against vblank start.
730 return (((high1
<< 8) | low
) + (pixel
>= vbl_start
)) & 0xffffff;
733 static u32
g4x_get_vblank_counter(struct drm_device
*dev
, unsigned int pipe
)
735 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
737 return I915_READ(PIPE_FRMCOUNT_G4X(pipe
));
740 /* I915_READ_FW, only for fast reads of display block, no need for forcewake etc. */
741 static int __intel_get_crtc_scanline(struct intel_crtc
*crtc
)
743 struct drm_device
*dev
= crtc
->base
.dev
;
744 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
745 const struct drm_display_mode
*mode
= &crtc
->base
.hwmode
;
746 enum pipe pipe
= crtc
->pipe
;
747 int position
, vtotal
;
749 vtotal
= mode
->crtc_vtotal
;
750 if (mode
->flags
& DRM_MODE_FLAG_INTERLACE
)
754 position
= I915_READ_FW(PIPEDSL(pipe
)) & DSL_LINEMASK_GEN2
;
756 position
= I915_READ_FW(PIPEDSL(pipe
)) & DSL_LINEMASK_GEN3
;
759 * On HSW, the DSL reg (0x70000) appears to return 0 if we
760 * read it just before the start of vblank. So try it again
761 * so we don't accidentally end up spanning a vblank frame
762 * increment, causing the pipe_update_end() code to squak at us.
764 * The nature of this problem means we can't simply check the ISR
765 * bit and return the vblank start value; nor can we use the scanline
766 * debug register in the transcoder as it appears to have the same
767 * problem. We may need to extend this to include other platforms,
768 * but so far testing only shows the problem on HSW.
770 if (HAS_DDI(dev
) && !position
) {
773 for (i
= 0; i
< 100; i
++) {
775 temp
= __raw_i915_read32(dev_priv
, PIPEDSL(pipe
)) &
777 if (temp
!= position
) {
785 * See update_scanline_offset() for the details on the
786 * scanline_offset adjustment.
788 return (position
+ crtc
->scanline_offset
) % vtotal
;
791 static int i915_get_crtc_scanoutpos(struct drm_device
*dev
, unsigned int pipe
,
792 unsigned int flags
, int *vpos
, int *hpos
,
793 ktime_t
*stime
, ktime_t
*etime
,
794 const struct drm_display_mode
*mode
)
796 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
797 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
798 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
800 int vbl_start
, vbl_end
, hsync_start
, htotal
, vtotal
;
803 unsigned long irqflags
;
805 if (WARN_ON(!mode
->crtc_clock
)) {
806 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
807 "pipe %c\n", pipe_name(pipe
));
811 htotal
= mode
->crtc_htotal
;
812 hsync_start
= mode
->crtc_hsync_start
;
813 vtotal
= mode
->crtc_vtotal
;
814 vbl_start
= mode
->crtc_vblank_start
;
815 vbl_end
= mode
->crtc_vblank_end
;
817 if (mode
->flags
& DRM_MODE_FLAG_INTERLACE
) {
818 vbl_start
= DIV_ROUND_UP(vbl_start
, 2);
823 ret
|= DRM_SCANOUTPOS_VALID
| DRM_SCANOUTPOS_ACCURATE
;
826 * Lock uncore.lock, as we will do multiple timing critical raw
827 * register reads, potentially with preemption disabled, so the
828 * following code must not block on uncore.lock.
830 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
832 /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
834 /* Get optional system timestamp before query. */
836 *stime
= ktime_get();
838 if (IS_GEN2(dev
) || IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
839 /* No obvious pixelcount register. Only query vertical
840 * scanout position from Display scan line register.
842 position
= __intel_get_crtc_scanline(intel_crtc
);
844 /* Have access to pixelcount since start of frame.
845 * We can split this into vertical and horizontal
848 position
= (I915_READ_FW(PIPEFRAMEPIXEL(pipe
)) & PIPE_PIXEL_MASK
) >> PIPE_PIXEL_SHIFT
;
850 /* convert to pixel counts */
856 * In interlaced modes, the pixel counter counts all pixels,
857 * so one field will have htotal more pixels. In order to avoid
858 * the reported position from jumping backwards when the pixel
859 * counter is beyond the length of the shorter field, just
860 * clamp the position the length of the shorter field. This
861 * matches how the scanline counter based position works since
862 * the scanline counter doesn't count the two half lines.
864 if (position
>= vtotal
)
865 position
= vtotal
- 1;
868 * Start of vblank interrupt is triggered at start of hsync,
869 * just prior to the first active line of vblank. However we
870 * consider lines to start at the leading edge of horizontal
871 * active. So, should we get here before we've crossed into
872 * the horizontal active of the first line in vblank, we would
873 * not set the DRM_SCANOUTPOS_INVBL flag. In order to fix that,
874 * always add htotal-hsync_start to the current pixel position.
876 position
= (position
+ htotal
- hsync_start
) % vtotal
;
879 /* Get optional system timestamp after query. */
881 *etime
= ktime_get();
883 /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
885 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
887 in_vbl
= position
>= vbl_start
&& position
< vbl_end
;
890 * While in vblank, position will be negative
891 * counting up towards 0 at vbl_end. And outside
892 * vblank, position will be positive counting
895 if (position
>= vbl_start
)
898 position
+= vtotal
- vbl_end
;
900 if (IS_GEN2(dev
) || IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
904 *vpos
= position
/ htotal
;
905 *hpos
= position
- (*vpos
* htotal
);
910 ret
|= DRM_SCANOUTPOS_IN_VBLANK
;
915 int intel_get_crtc_scanline(struct intel_crtc
*crtc
)
917 struct drm_i915_private
*dev_priv
= crtc
->base
.dev
->dev_private
;
918 unsigned long irqflags
;
921 spin_lock_irqsave(&dev_priv
->uncore
.lock
, irqflags
);
922 position
= __intel_get_crtc_scanline(crtc
);
923 spin_unlock_irqrestore(&dev_priv
->uncore
.lock
, irqflags
);
928 static int i915_get_vblank_timestamp(struct drm_device
*dev
, unsigned int pipe
,
930 struct timeval
*vblank_time
,
933 struct drm_crtc
*crtc
;
935 if (pipe
>= INTEL_INFO(dev
)->num_pipes
) {
936 DRM_ERROR("Invalid crtc %u\n", pipe
);
940 /* Get drm_crtc to timestamp: */
941 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
943 DRM_ERROR("Invalid crtc %u\n", pipe
);
947 if (!crtc
->hwmode
.crtc_clock
) {
948 DRM_DEBUG_KMS("crtc %u is disabled\n", pipe
);
952 /* Helper routine in DRM core does all the work: */
953 return drm_calc_vbltimestamp_from_scanoutpos(dev
, pipe
, max_error
,
958 static void ironlake_rps_change_irq_handler(struct drm_device
*dev
)
960 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
961 u32 busy_up
, busy_down
, max_avg
, min_avg
;
964 spin_lock(&mchdev_lock
);
966 I915_WRITE16(MEMINTRSTS
, I915_READ(MEMINTRSTS
));
968 new_delay
= dev_priv
->ips
.cur_delay
;
970 I915_WRITE16(MEMINTRSTS
, MEMINT_EVAL_CHG
);
971 busy_up
= I915_READ(RCPREVBSYTUPAVG
);
972 busy_down
= I915_READ(RCPREVBSYTDNAVG
);
973 max_avg
= I915_READ(RCBMAXAVG
);
974 min_avg
= I915_READ(RCBMINAVG
);
976 /* Handle RCS change request from hw */
977 if (busy_up
> max_avg
) {
978 if (dev_priv
->ips
.cur_delay
!= dev_priv
->ips
.max_delay
)
979 new_delay
= dev_priv
->ips
.cur_delay
- 1;
980 if (new_delay
< dev_priv
->ips
.max_delay
)
981 new_delay
= dev_priv
->ips
.max_delay
;
982 } else if (busy_down
< min_avg
) {
983 if (dev_priv
->ips
.cur_delay
!= dev_priv
->ips
.min_delay
)
984 new_delay
= dev_priv
->ips
.cur_delay
+ 1;
985 if (new_delay
> dev_priv
->ips
.min_delay
)
986 new_delay
= dev_priv
->ips
.min_delay
;
989 if (ironlake_set_drps(dev
, new_delay
))
990 dev_priv
->ips
.cur_delay
= new_delay
;
992 spin_unlock(&mchdev_lock
);
997 static void notify_ring(struct intel_engine_cs
*ring
)
999 if (!intel_ring_initialized(ring
))
1002 trace_i915_gem_request_notify(ring
);
1004 wake_up_all(&ring
->irq_queue
);
1007 static void vlv_c0_read(struct drm_i915_private
*dev_priv
,
1008 struct intel_rps_ei
*ei
)
1010 ei
->cz_clock
= vlv_punit_read(dev_priv
, PUNIT_REG_CZ_TIMESTAMP
);
1011 ei
->render_c0
= I915_READ(VLV_RENDER_C0_COUNT
);
1012 ei
->media_c0
= I915_READ(VLV_MEDIA_C0_COUNT
);
1015 static bool vlv_c0_above(struct drm_i915_private
*dev_priv
,
1016 const struct intel_rps_ei
*old
,
1017 const struct intel_rps_ei
*now
,
1021 unsigned int mul
= 100;
1023 if (old
->cz_clock
== 0)
1026 if (I915_READ(VLV_COUNTER_CONTROL
) & VLV_COUNT_RANGE_HIGH
)
1029 time
= now
->cz_clock
- old
->cz_clock
;
1030 time
*= threshold
* dev_priv
->czclk_freq
;
1032 /* Workload can be split between render + media, e.g. SwapBuffers
1033 * being blitted in X after being rendered in mesa. To account for
1034 * this we need to combine both engines into our activity counter.
1036 c0
= now
->render_c0
- old
->render_c0
;
1037 c0
+= now
->media_c0
- old
->media_c0
;
1038 c0
*= mul
* VLV_CZ_CLOCK_TO_MILLI_SEC
;
1043 void gen6_rps_reset_ei(struct drm_i915_private
*dev_priv
)
1045 vlv_c0_read(dev_priv
, &dev_priv
->rps
.down_ei
);
1046 dev_priv
->rps
.up_ei
= dev_priv
->rps
.down_ei
;
1049 static u32
vlv_wa_c0_ei(struct drm_i915_private
*dev_priv
, u32 pm_iir
)
1051 struct intel_rps_ei now
;
1054 if ((pm_iir
& (GEN6_PM_RP_DOWN_EI_EXPIRED
| GEN6_PM_RP_UP_EI_EXPIRED
)) == 0)
1057 vlv_c0_read(dev_priv
, &now
);
1058 if (now
.cz_clock
== 0)
1061 if (pm_iir
& GEN6_PM_RP_DOWN_EI_EXPIRED
) {
1062 if (!vlv_c0_above(dev_priv
,
1063 &dev_priv
->rps
.down_ei
, &now
,
1064 dev_priv
->rps
.down_threshold
))
1065 events
|= GEN6_PM_RP_DOWN_THRESHOLD
;
1066 dev_priv
->rps
.down_ei
= now
;
1069 if (pm_iir
& GEN6_PM_RP_UP_EI_EXPIRED
) {
1070 if (vlv_c0_above(dev_priv
,
1071 &dev_priv
->rps
.up_ei
, &now
,
1072 dev_priv
->rps
.up_threshold
))
1073 events
|= GEN6_PM_RP_UP_THRESHOLD
;
1074 dev_priv
->rps
.up_ei
= now
;
1080 static bool any_waiters(struct drm_i915_private
*dev_priv
)
1082 struct intel_engine_cs
*ring
;
1085 for_each_ring(ring
, dev_priv
, i
)
1086 if (ring
->irq_refcount
)
1092 static void gen6_pm_rps_work(struct work_struct
*work
)
1094 struct drm_i915_private
*dev_priv
=
1095 container_of(work
, struct drm_i915_private
, rps
.work
);
1097 int new_delay
, adj
, min
, max
;
1100 spin_lock_irq(&dev_priv
->irq_lock
);
1101 /* Speed up work cancelation during disabling rps interrupts. */
1102 if (!dev_priv
->rps
.interrupts_enabled
) {
1103 spin_unlock_irq(&dev_priv
->irq_lock
);
1108 * The RPS work is synced during runtime suspend, we don't require a
1109 * wakeref. TODO: instead of disabling the asserts make sure that we
1110 * always hold an RPM reference while the work is running.
1112 DISABLE_RPM_WAKEREF_ASSERTS(dev_priv
);
1114 pm_iir
= dev_priv
->rps
.pm_iir
;
1115 dev_priv
->rps
.pm_iir
= 0;
1116 /* Make sure not to corrupt PMIMR state used by ringbuffer on GEN6 */
1117 gen6_enable_pm_irq(dev_priv
, dev_priv
->pm_rps_events
);
1118 client_boost
= dev_priv
->rps
.client_boost
;
1119 dev_priv
->rps
.client_boost
= false;
1120 spin_unlock_irq(&dev_priv
->irq_lock
);
1122 /* Make sure we didn't queue anything we're not going to process. */
1123 WARN_ON(pm_iir
& ~dev_priv
->pm_rps_events
);
1125 if ((pm_iir
& dev_priv
->pm_rps_events
) == 0 && !client_boost
)
1128 mutex_lock(&dev_priv
->rps
.hw_lock
);
1130 pm_iir
|= vlv_wa_c0_ei(dev_priv
, pm_iir
);
1132 adj
= dev_priv
->rps
.last_adj
;
1133 new_delay
= dev_priv
->rps
.cur_freq
;
1134 min
= dev_priv
->rps
.min_freq_softlimit
;
1135 max
= dev_priv
->rps
.max_freq_softlimit
;
1138 new_delay
= dev_priv
->rps
.max_freq_softlimit
;
1140 } else if (pm_iir
& GEN6_PM_RP_UP_THRESHOLD
) {
1143 else /* CHV needs even encode values */
1144 adj
= IS_CHERRYVIEW(dev_priv
) ? 2 : 1;
1146 * For better performance, jump directly
1147 * to RPe if we're below it.
1149 if (new_delay
< dev_priv
->rps
.efficient_freq
- adj
) {
1150 new_delay
= dev_priv
->rps
.efficient_freq
;
1153 } else if (any_waiters(dev_priv
)) {
1155 } else if (pm_iir
& GEN6_PM_RP_DOWN_TIMEOUT
) {
1156 if (dev_priv
->rps
.cur_freq
> dev_priv
->rps
.efficient_freq
)
1157 new_delay
= dev_priv
->rps
.efficient_freq
;
1159 new_delay
= dev_priv
->rps
.min_freq_softlimit
;
1161 } else if (pm_iir
& GEN6_PM_RP_DOWN_THRESHOLD
) {
1164 else /* CHV needs even encode values */
1165 adj
= IS_CHERRYVIEW(dev_priv
) ? -2 : -1;
1166 } else { /* unknown event */
1170 dev_priv
->rps
.last_adj
= adj
;
1172 /* sysfs frequency interfaces may have snuck in while servicing the
1176 new_delay
= clamp_t(int, new_delay
, min
, max
);
1178 intel_set_rps(dev_priv
->dev
, new_delay
);
1180 mutex_unlock(&dev_priv
->rps
.hw_lock
);
1182 ENABLE_RPM_WAKEREF_ASSERTS(dev_priv
);
1187 * ivybridge_parity_work - Workqueue called when a parity error interrupt
1189 * @work: workqueue struct
1191 * Doesn't actually do anything except notify userspace. As a consequence of
1192 * this event, userspace should try to remap the bad rows since statistically
1193 * it is likely the same row is more likely to go bad again.
1195 static void ivybridge_parity_work(struct work_struct
*work
)
1197 struct drm_i915_private
*dev_priv
=
1198 container_of(work
, struct drm_i915_private
, l3_parity
.error_work
);
1199 u32 error_status
, row
, bank
, subbank
;
1200 char *parity_event
[6];
1204 /* We must turn off DOP level clock gating to access the L3 registers.
1205 * In order to prevent a get/put style interface, acquire struct mutex
1206 * any time we access those registers.
1208 mutex_lock(&dev_priv
->dev
->struct_mutex
);
1210 /* If we've screwed up tracking, just let the interrupt fire again */
1211 if (WARN_ON(!dev_priv
->l3_parity
.which_slice
))
1214 misccpctl
= I915_READ(GEN7_MISCCPCTL
);
1215 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
& ~GEN7_DOP_CLOCK_GATE_ENABLE
);
1216 POSTING_READ(GEN7_MISCCPCTL
);
1218 while ((slice
= ffs(dev_priv
->l3_parity
.which_slice
)) != 0) {
1222 if (WARN_ON_ONCE(slice
>= NUM_L3_SLICES(dev_priv
->dev
)))
1225 dev_priv
->l3_parity
.which_slice
&= ~(1<<slice
);
1227 reg
= GEN7_L3CDERRST1(slice
);
1229 error_status
= I915_READ(reg
);
1230 row
= GEN7_PARITY_ERROR_ROW(error_status
);
1231 bank
= GEN7_PARITY_ERROR_BANK(error_status
);
1232 subbank
= GEN7_PARITY_ERROR_SUBBANK(error_status
);
1234 I915_WRITE(reg
, GEN7_PARITY_ERROR_VALID
| GEN7_L3CDERRST1_ENABLE
);
1237 parity_event
[0] = I915_L3_PARITY_UEVENT
"=1";
1238 parity_event
[1] = kasprintf(GFP_KERNEL
, "ROW=%d", row
);
1239 parity_event
[2] = kasprintf(GFP_KERNEL
, "BANK=%d", bank
);
1240 parity_event
[3] = kasprintf(GFP_KERNEL
, "SUBBANK=%d", subbank
);
1241 parity_event
[4] = kasprintf(GFP_KERNEL
, "SLICE=%d", slice
);
1242 parity_event
[5] = NULL
;
1244 kobject_uevent_env(&dev_priv
->dev
->primary
->kdev
->kobj
,
1245 KOBJ_CHANGE
, parity_event
);
1247 DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n",
1248 slice
, row
, bank
, subbank
);
1250 kfree(parity_event
[4]);
1251 kfree(parity_event
[3]);
1252 kfree(parity_event
[2]);
1253 kfree(parity_event
[1]);
1256 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
);
1259 WARN_ON(dev_priv
->l3_parity
.which_slice
);
1260 spin_lock_irq(&dev_priv
->irq_lock
);
1261 gen5_enable_gt_irq(dev_priv
, GT_PARITY_ERROR(dev_priv
->dev
));
1262 spin_unlock_irq(&dev_priv
->irq_lock
);
1264 mutex_unlock(&dev_priv
->dev
->struct_mutex
);
1267 static void ivybridge_parity_error_irq_handler(struct drm_device
*dev
, u32 iir
)
1269 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1271 if (!HAS_L3_DPF(dev
))
1274 spin_lock(&dev_priv
->irq_lock
);
1275 gen5_disable_gt_irq(dev_priv
, GT_PARITY_ERROR(dev
));
1276 spin_unlock(&dev_priv
->irq_lock
);
1278 iir
&= GT_PARITY_ERROR(dev
);
1279 if (iir
& GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1
)
1280 dev_priv
->l3_parity
.which_slice
|= 1 << 1;
1282 if (iir
& GT_RENDER_L3_PARITY_ERROR_INTERRUPT
)
1283 dev_priv
->l3_parity
.which_slice
|= 1 << 0;
1285 queue_work(dev_priv
->wq
, &dev_priv
->l3_parity
.error_work
);
1288 static void ilk_gt_irq_handler(struct drm_device
*dev
,
1289 struct drm_i915_private
*dev_priv
,
1293 (GT_RENDER_USER_INTERRUPT
| GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
))
1294 notify_ring(&dev_priv
->ring
[RCS
]);
1295 if (gt_iir
& ILK_BSD_USER_INTERRUPT
)
1296 notify_ring(&dev_priv
->ring
[VCS
]);
1299 static void snb_gt_irq_handler(struct drm_device
*dev
,
1300 struct drm_i915_private
*dev_priv
,
1305 (GT_RENDER_USER_INTERRUPT
| GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
))
1306 notify_ring(&dev_priv
->ring
[RCS
]);
1307 if (gt_iir
& GT_BSD_USER_INTERRUPT
)
1308 notify_ring(&dev_priv
->ring
[VCS
]);
1309 if (gt_iir
& GT_BLT_USER_INTERRUPT
)
1310 notify_ring(&dev_priv
->ring
[BCS
]);
1312 if (gt_iir
& (GT_BLT_CS_ERROR_INTERRUPT
|
1313 GT_BSD_CS_ERROR_INTERRUPT
|
1314 GT_RENDER_CS_MASTER_ERROR_INTERRUPT
))
1315 DRM_DEBUG("Command parser error, gt_iir 0x%08x\n", gt_iir
);
1317 if (gt_iir
& GT_PARITY_ERROR(dev
))
1318 ivybridge_parity_error_irq_handler(dev
, gt_iir
);
1321 static __always_inline
void
1322 gen8_cs_irq_handler(struct intel_engine_cs
*ring
, u32 iir
, int test_shift
)
1324 if (iir
& (GT_RENDER_USER_INTERRUPT
<< test_shift
))
1326 if (iir
& (GT_CONTEXT_SWITCH_INTERRUPT
<< test_shift
))
1327 intel_lrc_irq_handler(ring
);
1330 static irqreturn_t
gen8_gt_irq_handler(struct drm_i915_private
*dev_priv
,
1333 irqreturn_t ret
= IRQ_NONE
;
1335 if (master_ctl
& (GEN8_GT_RCS_IRQ
| GEN8_GT_BCS_IRQ
)) {
1336 u32 iir
= I915_READ_FW(GEN8_GT_IIR(0));
1338 I915_WRITE_FW(GEN8_GT_IIR(0), iir
);
1341 gen8_cs_irq_handler(&dev_priv
->ring
[RCS
],
1342 iir
, GEN8_RCS_IRQ_SHIFT
);
1344 gen8_cs_irq_handler(&dev_priv
->ring
[BCS
],
1345 iir
, GEN8_BCS_IRQ_SHIFT
);
1347 DRM_ERROR("The master control interrupt lied (GT0)!\n");
1350 if (master_ctl
& (GEN8_GT_VCS1_IRQ
| GEN8_GT_VCS2_IRQ
)) {
1351 u32 iir
= I915_READ_FW(GEN8_GT_IIR(1));
1353 I915_WRITE_FW(GEN8_GT_IIR(1), iir
);
1356 gen8_cs_irq_handler(&dev_priv
->ring
[VCS
],
1357 iir
, GEN8_VCS1_IRQ_SHIFT
);
1359 gen8_cs_irq_handler(&dev_priv
->ring
[VCS2
],
1360 iir
, GEN8_VCS2_IRQ_SHIFT
);
1362 DRM_ERROR("The master control interrupt lied (GT1)!\n");
1365 if (master_ctl
& GEN8_GT_VECS_IRQ
) {
1366 u32 iir
= I915_READ_FW(GEN8_GT_IIR(3));
1368 I915_WRITE_FW(GEN8_GT_IIR(3), iir
);
1371 gen8_cs_irq_handler(&dev_priv
->ring
[VECS
],
1372 iir
, GEN8_VECS_IRQ_SHIFT
);
1374 DRM_ERROR("The master control interrupt lied (GT3)!\n");
1377 if (master_ctl
& GEN8_GT_PM_IRQ
) {
1378 u32 iir
= I915_READ_FW(GEN8_GT_IIR(2));
1379 if (iir
& dev_priv
->pm_rps_events
) {
1380 I915_WRITE_FW(GEN8_GT_IIR(2),
1381 iir
& dev_priv
->pm_rps_events
);
1383 gen6_rps_irq_handler(dev_priv
, iir
);
1385 DRM_ERROR("The master control interrupt lied (PM)!\n");
1391 static bool bxt_port_hotplug_long_detect(enum port port
, u32 val
)
1395 return val
& PORTA_HOTPLUG_LONG_DETECT
;
1397 return val
& PORTB_HOTPLUG_LONG_DETECT
;
1399 return val
& PORTC_HOTPLUG_LONG_DETECT
;
1405 static bool spt_port_hotplug2_long_detect(enum port port
, u32 val
)
1409 return val
& PORTE_HOTPLUG_LONG_DETECT
;
1415 static bool spt_port_hotplug_long_detect(enum port port
, u32 val
)
1419 return val
& PORTA_HOTPLUG_LONG_DETECT
;
1421 return val
& PORTB_HOTPLUG_LONG_DETECT
;
1423 return val
& PORTC_HOTPLUG_LONG_DETECT
;
1425 return val
& PORTD_HOTPLUG_LONG_DETECT
;
1431 static bool ilk_port_hotplug_long_detect(enum port port
, u32 val
)
1435 return val
& DIGITAL_PORTA_HOTPLUG_LONG_DETECT
;
1441 static bool pch_port_hotplug_long_detect(enum port port
, u32 val
)
1445 return val
& PORTB_HOTPLUG_LONG_DETECT
;
1447 return val
& PORTC_HOTPLUG_LONG_DETECT
;
1449 return val
& PORTD_HOTPLUG_LONG_DETECT
;
1455 static bool i9xx_port_hotplug_long_detect(enum port port
, u32 val
)
1459 return val
& PORTB_HOTPLUG_INT_LONG_PULSE
;
1461 return val
& PORTC_HOTPLUG_INT_LONG_PULSE
;
1463 return val
& PORTD_HOTPLUG_INT_LONG_PULSE
;
1470 * Get a bit mask of pins that have triggered, and which ones may be long.
1471 * This can be called multiple times with the same masks to accumulate
1472 * hotplug detection results from several registers.
1474 * Note that the caller is expected to zero out the masks initially.
1476 static void intel_get_hpd_pins(u32
*pin_mask
, u32
*long_mask
,
1477 u32 hotplug_trigger
, u32 dig_hotplug_reg
,
1478 const u32 hpd
[HPD_NUM_PINS
],
1479 bool long_pulse_detect(enum port port
, u32 val
))
1484 for_each_hpd_pin(i
) {
1485 if ((hpd
[i
] & hotplug_trigger
) == 0)
1488 *pin_mask
|= BIT(i
);
1490 if (!intel_hpd_pin_to_port(i
, &port
))
1493 if (long_pulse_detect(port
, dig_hotplug_reg
))
1494 *long_mask
|= BIT(i
);
1497 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x, dig 0x%08x, pins 0x%08x\n",
1498 hotplug_trigger
, dig_hotplug_reg
, *pin_mask
);
1502 static void gmbus_irq_handler(struct drm_device
*dev
)
1504 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1506 wake_up_all(&dev_priv
->gmbus_wait_queue
);
1509 static void dp_aux_irq_handler(struct drm_device
*dev
)
1511 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1513 wake_up_all(&dev_priv
->gmbus_wait_queue
);
1516 #if defined(CONFIG_DEBUG_FS)
1517 static void display_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
,
1518 uint32_t crc0
, uint32_t crc1
,
1519 uint32_t crc2
, uint32_t crc3
,
1522 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1523 struct intel_pipe_crc
*pipe_crc
= &dev_priv
->pipe_crc
[pipe
];
1524 struct intel_pipe_crc_entry
*entry
;
1527 spin_lock(&pipe_crc
->lock
);
1529 if (!pipe_crc
->entries
) {
1530 spin_unlock(&pipe_crc
->lock
);
1531 DRM_DEBUG_KMS("spurious interrupt\n");
1535 head
= pipe_crc
->head
;
1536 tail
= pipe_crc
->tail
;
1538 if (CIRC_SPACE(head
, tail
, INTEL_PIPE_CRC_ENTRIES_NR
) < 1) {
1539 spin_unlock(&pipe_crc
->lock
);
1540 DRM_ERROR("CRC buffer overflowing\n");
1544 entry
= &pipe_crc
->entries
[head
];
1546 entry
->frame
= dev
->driver
->get_vblank_counter(dev
, pipe
);
1547 entry
->crc
[0] = crc0
;
1548 entry
->crc
[1] = crc1
;
1549 entry
->crc
[2] = crc2
;
1550 entry
->crc
[3] = crc3
;
1551 entry
->crc
[4] = crc4
;
1553 head
= (head
+ 1) & (INTEL_PIPE_CRC_ENTRIES_NR
- 1);
1554 pipe_crc
->head
= head
;
1556 spin_unlock(&pipe_crc
->lock
);
1558 wake_up_interruptible(&pipe_crc
->wq
);
1562 display_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
,
1563 uint32_t crc0
, uint32_t crc1
,
1564 uint32_t crc2
, uint32_t crc3
,
1569 static void hsw_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
)
1571 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1573 display_pipe_crc_irq_handler(dev
, pipe
,
1574 I915_READ(PIPE_CRC_RES_1_IVB(pipe
)),
1578 static void ivb_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
)
1580 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1582 display_pipe_crc_irq_handler(dev
, pipe
,
1583 I915_READ(PIPE_CRC_RES_1_IVB(pipe
)),
1584 I915_READ(PIPE_CRC_RES_2_IVB(pipe
)),
1585 I915_READ(PIPE_CRC_RES_3_IVB(pipe
)),
1586 I915_READ(PIPE_CRC_RES_4_IVB(pipe
)),
1587 I915_READ(PIPE_CRC_RES_5_IVB(pipe
)));
1590 static void i9xx_pipe_crc_irq_handler(struct drm_device
*dev
, enum pipe pipe
)
1592 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1593 uint32_t res1
, res2
;
1595 if (INTEL_INFO(dev
)->gen
>= 3)
1596 res1
= I915_READ(PIPE_CRC_RES_RES1_I915(pipe
));
1600 if (INTEL_INFO(dev
)->gen
>= 5 || IS_G4X(dev
))
1601 res2
= I915_READ(PIPE_CRC_RES_RES2_G4X(pipe
));
1605 display_pipe_crc_irq_handler(dev
, pipe
,
1606 I915_READ(PIPE_CRC_RES_RED(pipe
)),
1607 I915_READ(PIPE_CRC_RES_GREEN(pipe
)),
1608 I915_READ(PIPE_CRC_RES_BLUE(pipe
)),
1612 /* The RPS events need forcewake, so we add them to a work queue and mask their
1613 * IMR bits until the work is done. Other interrupts can be processed without
1614 * the work queue. */
1615 static void gen6_rps_irq_handler(struct drm_i915_private
*dev_priv
, u32 pm_iir
)
1617 if (pm_iir
& dev_priv
->pm_rps_events
) {
1618 spin_lock(&dev_priv
->irq_lock
);
1619 gen6_disable_pm_irq(dev_priv
, pm_iir
& dev_priv
->pm_rps_events
);
1620 if (dev_priv
->rps
.interrupts_enabled
) {
1621 dev_priv
->rps
.pm_iir
|= pm_iir
& dev_priv
->pm_rps_events
;
1622 queue_work(dev_priv
->wq
, &dev_priv
->rps
.work
);
1624 spin_unlock(&dev_priv
->irq_lock
);
1627 if (INTEL_INFO(dev_priv
)->gen
>= 8)
1630 if (HAS_VEBOX(dev_priv
->dev
)) {
1631 if (pm_iir
& PM_VEBOX_USER_INTERRUPT
)
1632 notify_ring(&dev_priv
->ring
[VECS
]);
1634 if (pm_iir
& PM_VEBOX_CS_ERROR_INTERRUPT
)
1635 DRM_DEBUG("Command parser error, pm_iir 0x%08x\n", pm_iir
);
1639 static bool intel_pipe_handle_vblank(struct drm_device
*dev
, enum pipe pipe
)
1641 if (!drm_handle_vblank(dev
, pipe
))
1647 static void valleyview_pipestat_irq_handler(struct drm_device
*dev
, u32 iir
)
1649 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1650 u32 pipe_stats
[I915_MAX_PIPES
] = { };
1653 spin_lock(&dev_priv
->irq_lock
);
1654 for_each_pipe(dev_priv
, pipe
) {
1656 u32 mask
, iir_bit
= 0;
1659 * PIPESTAT bits get signalled even when the interrupt is
1660 * disabled with the mask bits, and some of the status bits do
1661 * not generate interrupts at all (like the underrun bit). Hence
1662 * we need to be careful that we only handle what we want to
1666 /* fifo underruns are filterered in the underrun handler. */
1667 mask
= PIPE_FIFO_UNDERRUN_STATUS
;
1671 iir_bit
= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
;
1674 iir_bit
= I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
;
1677 iir_bit
= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT
;
1681 mask
|= dev_priv
->pipestat_irq_mask
[pipe
];
1686 reg
= PIPESTAT(pipe
);
1687 mask
|= PIPESTAT_INT_ENABLE_MASK
;
1688 pipe_stats
[pipe
] = I915_READ(reg
) & mask
;
1691 * Clear the PIPE*STAT regs before the IIR
1693 if (pipe_stats
[pipe
] & (PIPE_FIFO_UNDERRUN_STATUS
|
1694 PIPESTAT_INT_STATUS_MASK
))
1695 I915_WRITE(reg
, pipe_stats
[pipe
]);
1697 spin_unlock(&dev_priv
->irq_lock
);
1699 for_each_pipe(dev_priv
, pipe
) {
1700 if (pipe_stats
[pipe
] & PIPE_START_VBLANK_INTERRUPT_STATUS
&&
1701 intel_pipe_handle_vblank(dev
, pipe
))
1702 intel_check_page_flip(dev
, pipe
);
1704 if (pipe_stats
[pipe
] & PLANE_FLIP_DONE_INT_STATUS_VLV
) {
1705 intel_prepare_page_flip(dev
, pipe
);
1706 intel_finish_page_flip(dev
, pipe
);
1709 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
1710 i9xx_pipe_crc_irq_handler(dev
, pipe
);
1712 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
1713 intel_cpu_fifo_underrun_irq_handler(dev_priv
, pipe
);
1716 if (pipe_stats
[0] & PIPE_GMBUS_INTERRUPT_STATUS
)
1717 gmbus_irq_handler(dev
);
1720 static void i9xx_hpd_irq_handler(struct drm_device
*dev
)
1722 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1723 u32 hotplug_status
= I915_READ(PORT_HOTPLUG_STAT
);
1724 u32 pin_mask
= 0, long_mask
= 0;
1726 if (!hotplug_status
)
1729 I915_WRITE(PORT_HOTPLUG_STAT
, hotplug_status
);
1731 * Make sure hotplug status is cleared before we clear IIR, or else we
1732 * may miss hotplug events.
1734 POSTING_READ(PORT_HOTPLUG_STAT
);
1736 if (IS_G4X(dev
) || IS_VALLEYVIEW(dev
) || IS_CHERRYVIEW(dev
)) {
1737 u32 hotplug_trigger
= hotplug_status
& HOTPLUG_INT_STATUS_G4X
;
1739 if (hotplug_trigger
) {
1740 intel_get_hpd_pins(&pin_mask
, &long_mask
, hotplug_trigger
,
1741 hotplug_trigger
, hpd_status_g4x
,
1742 i9xx_port_hotplug_long_detect
);
1744 intel_hpd_irq_handler(dev
, pin_mask
, long_mask
);
1747 if (hotplug_status
& DP_AUX_CHANNEL_MASK_INT_STATUS_G4X
)
1748 dp_aux_irq_handler(dev
);
1750 u32 hotplug_trigger
= hotplug_status
& HOTPLUG_INT_STATUS_I915
;
1752 if (hotplug_trigger
) {
1753 intel_get_hpd_pins(&pin_mask
, &long_mask
, hotplug_trigger
,
1754 hotplug_trigger
, hpd_status_i915
,
1755 i9xx_port_hotplug_long_detect
);
1756 intel_hpd_irq_handler(dev
, pin_mask
, long_mask
);
1761 static irqreturn_t
valleyview_irq_handler(int irq
, void *arg
)
1763 struct drm_device
*dev
= arg
;
1764 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1765 u32 iir
, gt_iir
, pm_iir
;
1766 irqreturn_t ret
= IRQ_NONE
;
1768 if (!intel_irqs_enabled(dev_priv
))
1771 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
1772 disable_rpm_wakeref_asserts(dev_priv
);
1775 /* Find, clear, then process each source of interrupt */
1777 gt_iir
= I915_READ(GTIIR
);
1779 I915_WRITE(GTIIR
, gt_iir
);
1781 pm_iir
= I915_READ(GEN6_PMIIR
);
1783 I915_WRITE(GEN6_PMIIR
, pm_iir
);
1785 iir
= I915_READ(VLV_IIR
);
1787 /* Consume port before clearing IIR or we'll miss events */
1788 if (iir
& I915_DISPLAY_PORT_INTERRUPT
)
1789 i9xx_hpd_irq_handler(dev
);
1790 I915_WRITE(VLV_IIR
, iir
);
1793 if (gt_iir
== 0 && pm_iir
== 0 && iir
== 0)
1799 snb_gt_irq_handler(dev
, dev_priv
, gt_iir
);
1801 gen6_rps_irq_handler(dev_priv
, pm_iir
);
1802 /* Call regardless, as some status bits might not be
1803 * signalled in iir */
1804 valleyview_pipestat_irq_handler(dev
, iir
);
1808 enable_rpm_wakeref_asserts(dev_priv
);
1813 static irqreturn_t
cherryview_irq_handler(int irq
, void *arg
)
1815 struct drm_device
*dev
= arg
;
1816 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1817 u32 master_ctl
, iir
;
1818 irqreturn_t ret
= IRQ_NONE
;
1820 if (!intel_irqs_enabled(dev_priv
))
1823 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
1824 disable_rpm_wakeref_asserts(dev_priv
);
1827 master_ctl
= I915_READ(GEN8_MASTER_IRQ
) & ~GEN8_MASTER_IRQ_CONTROL
;
1828 iir
= I915_READ(VLV_IIR
);
1830 if (master_ctl
== 0 && iir
== 0)
1835 I915_WRITE(GEN8_MASTER_IRQ
, 0);
1837 /* Find, clear, then process each source of interrupt */
1840 /* Consume port before clearing IIR or we'll miss events */
1841 if (iir
& I915_DISPLAY_PORT_INTERRUPT
)
1842 i9xx_hpd_irq_handler(dev
);
1843 I915_WRITE(VLV_IIR
, iir
);
1846 gen8_gt_irq_handler(dev_priv
, master_ctl
);
1848 /* Call regardless, as some status bits might not be
1849 * signalled in iir */
1850 valleyview_pipestat_irq_handler(dev
, iir
);
1852 I915_WRITE(GEN8_MASTER_IRQ
, DE_MASTER_IRQ_CONTROL
);
1853 POSTING_READ(GEN8_MASTER_IRQ
);
1856 enable_rpm_wakeref_asserts(dev_priv
);
1861 static void ibx_hpd_irq_handler(struct drm_device
*dev
, u32 hotplug_trigger
,
1862 const u32 hpd
[HPD_NUM_PINS
])
1864 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1865 u32 dig_hotplug_reg
, pin_mask
= 0, long_mask
= 0;
1868 * Somehow the PCH doesn't seem to really ack the interrupt to the CPU
1869 * unless we touch the hotplug register, even if hotplug_trigger is
1870 * zero. Not acking leads to "The master control interrupt lied (SDE)!"
1873 dig_hotplug_reg
= I915_READ(PCH_PORT_HOTPLUG
);
1874 if (!hotplug_trigger
) {
1875 u32 mask
= PORTA_HOTPLUG_STATUS_MASK
|
1876 PORTD_HOTPLUG_STATUS_MASK
|
1877 PORTC_HOTPLUG_STATUS_MASK
|
1878 PORTB_HOTPLUG_STATUS_MASK
;
1879 dig_hotplug_reg
&= ~mask
;
1882 I915_WRITE(PCH_PORT_HOTPLUG
, dig_hotplug_reg
);
1883 if (!hotplug_trigger
)
1886 intel_get_hpd_pins(&pin_mask
, &long_mask
, hotplug_trigger
,
1887 dig_hotplug_reg
, hpd
,
1888 pch_port_hotplug_long_detect
);
1890 intel_hpd_irq_handler(dev
, pin_mask
, long_mask
);
1893 static void ibx_irq_handler(struct drm_device
*dev
, u32 pch_iir
)
1895 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1897 u32 hotplug_trigger
= pch_iir
& SDE_HOTPLUG_MASK
;
1899 ibx_hpd_irq_handler(dev
, hotplug_trigger
, hpd_ibx
);
1901 if (pch_iir
& SDE_AUDIO_POWER_MASK
) {
1902 int port
= ffs((pch_iir
& SDE_AUDIO_POWER_MASK
) >>
1903 SDE_AUDIO_POWER_SHIFT
);
1904 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
1908 if (pch_iir
& SDE_AUX_MASK
)
1909 dp_aux_irq_handler(dev
);
1911 if (pch_iir
& SDE_GMBUS
)
1912 gmbus_irq_handler(dev
);
1914 if (pch_iir
& SDE_AUDIO_HDCP_MASK
)
1915 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1917 if (pch_iir
& SDE_AUDIO_TRANS_MASK
)
1918 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1920 if (pch_iir
& SDE_POISON
)
1921 DRM_ERROR("PCH poison interrupt\n");
1923 if (pch_iir
& SDE_FDI_MASK
)
1924 for_each_pipe(dev_priv
, pipe
)
1925 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1927 I915_READ(FDI_RX_IIR(pipe
)));
1929 if (pch_iir
& (SDE_TRANSB_CRC_DONE
| SDE_TRANSA_CRC_DONE
))
1930 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1932 if (pch_iir
& (SDE_TRANSB_CRC_ERR
| SDE_TRANSA_CRC_ERR
))
1933 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
1935 if (pch_iir
& SDE_TRANSA_FIFO_UNDER
)
1936 intel_pch_fifo_underrun_irq_handler(dev_priv
, TRANSCODER_A
);
1938 if (pch_iir
& SDE_TRANSB_FIFO_UNDER
)
1939 intel_pch_fifo_underrun_irq_handler(dev_priv
, TRANSCODER_B
);
1942 static void ivb_err_int_handler(struct drm_device
*dev
)
1944 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1945 u32 err_int
= I915_READ(GEN7_ERR_INT
);
1948 if (err_int
& ERR_INT_POISON
)
1949 DRM_ERROR("Poison interrupt\n");
1951 for_each_pipe(dev_priv
, pipe
) {
1952 if (err_int
& ERR_INT_FIFO_UNDERRUN(pipe
))
1953 intel_cpu_fifo_underrun_irq_handler(dev_priv
, pipe
);
1955 if (err_int
& ERR_INT_PIPE_CRC_DONE(pipe
)) {
1956 if (IS_IVYBRIDGE(dev
))
1957 ivb_pipe_crc_irq_handler(dev
, pipe
);
1959 hsw_pipe_crc_irq_handler(dev
, pipe
);
1963 I915_WRITE(GEN7_ERR_INT
, err_int
);
1966 static void cpt_serr_int_handler(struct drm_device
*dev
)
1968 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1969 u32 serr_int
= I915_READ(SERR_INT
);
1971 if (serr_int
& SERR_INT_POISON
)
1972 DRM_ERROR("PCH poison interrupt\n");
1974 if (serr_int
& SERR_INT_TRANS_A_FIFO_UNDERRUN
)
1975 intel_pch_fifo_underrun_irq_handler(dev_priv
, TRANSCODER_A
);
1977 if (serr_int
& SERR_INT_TRANS_B_FIFO_UNDERRUN
)
1978 intel_pch_fifo_underrun_irq_handler(dev_priv
, TRANSCODER_B
);
1980 if (serr_int
& SERR_INT_TRANS_C_FIFO_UNDERRUN
)
1981 intel_pch_fifo_underrun_irq_handler(dev_priv
, TRANSCODER_C
);
1983 I915_WRITE(SERR_INT
, serr_int
);
1986 static void cpt_irq_handler(struct drm_device
*dev
, u32 pch_iir
)
1988 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1990 u32 hotplug_trigger
= pch_iir
& SDE_HOTPLUG_MASK_CPT
;
1992 ibx_hpd_irq_handler(dev
, hotplug_trigger
, hpd_cpt
);
1994 if (pch_iir
& SDE_AUDIO_POWER_MASK_CPT
) {
1995 int port
= ffs((pch_iir
& SDE_AUDIO_POWER_MASK_CPT
) >>
1996 SDE_AUDIO_POWER_SHIFT_CPT
);
1997 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
2001 if (pch_iir
& SDE_AUX_MASK_CPT
)
2002 dp_aux_irq_handler(dev
);
2004 if (pch_iir
& SDE_GMBUS_CPT
)
2005 gmbus_irq_handler(dev
);
2007 if (pch_iir
& SDE_AUDIO_CP_REQ_CPT
)
2008 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
2010 if (pch_iir
& SDE_AUDIO_CP_CHG_CPT
)
2011 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
2013 if (pch_iir
& SDE_FDI_MASK_CPT
)
2014 for_each_pipe(dev_priv
, pipe
)
2015 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
2017 I915_READ(FDI_RX_IIR(pipe
)));
2019 if (pch_iir
& SDE_ERROR_CPT
)
2020 cpt_serr_int_handler(dev
);
2023 static void spt_irq_handler(struct drm_device
*dev
, u32 pch_iir
)
2025 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2026 u32 hotplug_trigger
= pch_iir
& SDE_HOTPLUG_MASK_SPT
&
2027 ~SDE_PORTE_HOTPLUG_SPT
;
2028 u32 hotplug2_trigger
= pch_iir
& SDE_PORTE_HOTPLUG_SPT
;
2029 u32 pin_mask
= 0, long_mask
= 0;
2031 if (hotplug_trigger
) {
2032 u32 dig_hotplug_reg
;
2034 dig_hotplug_reg
= I915_READ(PCH_PORT_HOTPLUG
);
2035 I915_WRITE(PCH_PORT_HOTPLUG
, dig_hotplug_reg
);
2037 intel_get_hpd_pins(&pin_mask
, &long_mask
, hotplug_trigger
,
2038 dig_hotplug_reg
, hpd_spt
,
2039 spt_port_hotplug_long_detect
);
2042 if (hotplug2_trigger
) {
2043 u32 dig_hotplug_reg
;
2045 dig_hotplug_reg
= I915_READ(PCH_PORT_HOTPLUG2
);
2046 I915_WRITE(PCH_PORT_HOTPLUG2
, dig_hotplug_reg
);
2048 intel_get_hpd_pins(&pin_mask
, &long_mask
, hotplug2_trigger
,
2049 dig_hotplug_reg
, hpd_spt
,
2050 spt_port_hotplug2_long_detect
);
2054 intel_hpd_irq_handler(dev
, pin_mask
, long_mask
);
2056 if (pch_iir
& SDE_GMBUS_CPT
)
2057 gmbus_irq_handler(dev
);
2060 static void ilk_hpd_irq_handler(struct drm_device
*dev
, u32 hotplug_trigger
,
2061 const u32 hpd
[HPD_NUM_PINS
])
2063 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2064 u32 dig_hotplug_reg
, pin_mask
= 0, long_mask
= 0;
2066 dig_hotplug_reg
= I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL
);
2067 I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL
, dig_hotplug_reg
);
2069 intel_get_hpd_pins(&pin_mask
, &long_mask
, hotplug_trigger
,
2070 dig_hotplug_reg
, hpd
,
2071 ilk_port_hotplug_long_detect
);
2073 intel_hpd_irq_handler(dev
, pin_mask
, long_mask
);
2076 static void ilk_display_irq_handler(struct drm_device
*dev
, u32 de_iir
)
2078 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2080 u32 hotplug_trigger
= de_iir
& DE_DP_A_HOTPLUG
;
2082 if (hotplug_trigger
)
2083 ilk_hpd_irq_handler(dev
, hotplug_trigger
, hpd_ilk
);
2085 if (de_iir
& DE_AUX_CHANNEL_A
)
2086 dp_aux_irq_handler(dev
);
2088 if (de_iir
& DE_GSE
)
2089 intel_opregion_asle_intr(dev
);
2091 if (de_iir
& DE_POISON
)
2092 DRM_ERROR("Poison interrupt\n");
2094 for_each_pipe(dev_priv
, pipe
) {
2095 if (de_iir
& DE_PIPE_VBLANK(pipe
) &&
2096 intel_pipe_handle_vblank(dev
, pipe
))
2097 intel_check_page_flip(dev
, pipe
);
2099 if (de_iir
& DE_PIPE_FIFO_UNDERRUN(pipe
))
2100 intel_cpu_fifo_underrun_irq_handler(dev_priv
, pipe
);
2102 if (de_iir
& DE_PIPE_CRC_DONE(pipe
))
2103 i9xx_pipe_crc_irq_handler(dev
, pipe
);
2105 /* plane/pipes map 1:1 on ilk+ */
2106 if (de_iir
& DE_PLANE_FLIP_DONE(pipe
)) {
2107 intel_prepare_page_flip(dev
, pipe
);
2108 intel_finish_page_flip_plane(dev
, pipe
);
2112 /* check event from PCH */
2113 if (de_iir
& DE_PCH_EVENT
) {
2114 u32 pch_iir
= I915_READ(SDEIIR
);
2116 if (HAS_PCH_CPT(dev
))
2117 cpt_irq_handler(dev
, pch_iir
);
2119 ibx_irq_handler(dev
, pch_iir
);
2121 /* should clear PCH hotplug event before clear CPU irq */
2122 I915_WRITE(SDEIIR
, pch_iir
);
2125 if (IS_GEN5(dev
) && de_iir
& DE_PCU_EVENT
)
2126 ironlake_rps_change_irq_handler(dev
);
2129 static void ivb_display_irq_handler(struct drm_device
*dev
, u32 de_iir
)
2131 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2133 u32 hotplug_trigger
= de_iir
& DE_DP_A_HOTPLUG_IVB
;
2135 if (hotplug_trigger
)
2136 ilk_hpd_irq_handler(dev
, hotplug_trigger
, hpd_ivb
);
2138 if (de_iir
& DE_ERR_INT_IVB
)
2139 ivb_err_int_handler(dev
);
2141 if (de_iir
& DE_AUX_CHANNEL_A_IVB
)
2142 dp_aux_irq_handler(dev
);
2144 if (de_iir
& DE_GSE_IVB
)
2145 intel_opregion_asle_intr(dev
);
2147 for_each_pipe(dev_priv
, pipe
) {
2148 if (de_iir
& (DE_PIPE_VBLANK_IVB(pipe
)) &&
2149 intel_pipe_handle_vblank(dev
, pipe
))
2150 intel_check_page_flip(dev
, pipe
);
2152 /* plane/pipes map 1:1 on ilk+ */
2153 if (de_iir
& DE_PLANE_FLIP_DONE_IVB(pipe
)) {
2154 intel_prepare_page_flip(dev
, pipe
);
2155 intel_finish_page_flip_plane(dev
, pipe
);
2159 /* check event from PCH */
2160 if (!HAS_PCH_NOP(dev
) && (de_iir
& DE_PCH_EVENT_IVB
)) {
2161 u32 pch_iir
= I915_READ(SDEIIR
);
2163 cpt_irq_handler(dev
, pch_iir
);
2165 /* clear PCH hotplug event before clear CPU irq */
2166 I915_WRITE(SDEIIR
, pch_iir
);
2171 * To handle irqs with the minimum potential races with fresh interrupts, we:
2172 * 1 - Disable Master Interrupt Control.
2173 * 2 - Find the source(s) of the interrupt.
2174 * 3 - Clear the Interrupt Identity bits (IIR).
2175 * 4 - Process the interrupt(s) that had bits set in the IIRs.
2176 * 5 - Re-enable Master Interrupt Control.
2178 static irqreturn_t
ironlake_irq_handler(int irq
, void *arg
)
2180 struct drm_device
*dev
= arg
;
2181 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2182 u32 de_iir
, gt_iir
, de_ier
, sde_ier
= 0;
2183 irqreturn_t ret
= IRQ_NONE
;
2185 if (!intel_irqs_enabled(dev_priv
))
2188 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2189 disable_rpm_wakeref_asserts(dev_priv
);
2191 /* disable master interrupt before clearing iir */
2192 de_ier
= I915_READ(DEIER
);
2193 I915_WRITE(DEIER
, de_ier
& ~DE_MASTER_IRQ_CONTROL
);
2194 POSTING_READ(DEIER
);
2196 /* Disable south interrupts. We'll only write to SDEIIR once, so further
2197 * interrupts will will be stored on its back queue, and then we'll be
2198 * able to process them after we restore SDEIER (as soon as we restore
2199 * it, we'll get an interrupt if SDEIIR still has something to process
2200 * due to its back queue). */
2201 if (!HAS_PCH_NOP(dev
)) {
2202 sde_ier
= I915_READ(SDEIER
);
2203 I915_WRITE(SDEIER
, 0);
2204 POSTING_READ(SDEIER
);
2207 /* Find, clear, then process each source of interrupt */
2209 gt_iir
= I915_READ(GTIIR
);
2211 I915_WRITE(GTIIR
, gt_iir
);
2213 if (INTEL_INFO(dev
)->gen
>= 6)
2214 snb_gt_irq_handler(dev
, dev_priv
, gt_iir
);
2216 ilk_gt_irq_handler(dev
, dev_priv
, gt_iir
);
2219 de_iir
= I915_READ(DEIIR
);
2221 I915_WRITE(DEIIR
, de_iir
);
2223 if (INTEL_INFO(dev
)->gen
>= 7)
2224 ivb_display_irq_handler(dev
, de_iir
);
2226 ilk_display_irq_handler(dev
, de_iir
);
2229 if (INTEL_INFO(dev
)->gen
>= 6) {
2230 u32 pm_iir
= I915_READ(GEN6_PMIIR
);
2232 I915_WRITE(GEN6_PMIIR
, pm_iir
);
2234 gen6_rps_irq_handler(dev_priv
, pm_iir
);
2238 I915_WRITE(DEIER
, de_ier
);
2239 POSTING_READ(DEIER
);
2240 if (!HAS_PCH_NOP(dev
)) {
2241 I915_WRITE(SDEIER
, sde_ier
);
2242 POSTING_READ(SDEIER
);
2245 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2246 enable_rpm_wakeref_asserts(dev_priv
);
2251 static void bxt_hpd_irq_handler(struct drm_device
*dev
, u32 hotplug_trigger
,
2252 const u32 hpd
[HPD_NUM_PINS
])
2254 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2255 u32 dig_hotplug_reg
, pin_mask
= 0, long_mask
= 0;
2257 dig_hotplug_reg
= I915_READ(PCH_PORT_HOTPLUG
);
2258 I915_WRITE(PCH_PORT_HOTPLUG
, dig_hotplug_reg
);
2260 intel_get_hpd_pins(&pin_mask
, &long_mask
, hotplug_trigger
,
2261 dig_hotplug_reg
, hpd
,
2262 bxt_port_hotplug_long_detect
);
2264 intel_hpd_irq_handler(dev
, pin_mask
, long_mask
);
2268 gen8_de_irq_handler(struct drm_i915_private
*dev_priv
, u32 master_ctl
)
2270 struct drm_device
*dev
= dev_priv
->dev
;
2271 irqreturn_t ret
= IRQ_NONE
;
2275 if (master_ctl
& GEN8_DE_MISC_IRQ
) {
2276 iir
= I915_READ(GEN8_DE_MISC_IIR
);
2278 I915_WRITE(GEN8_DE_MISC_IIR
, iir
);
2280 if (iir
& GEN8_DE_MISC_GSE
)
2281 intel_opregion_asle_intr(dev
);
2283 DRM_ERROR("Unexpected DE Misc interrupt\n");
2286 DRM_ERROR("The master control interrupt lied (DE MISC)!\n");
2289 if (master_ctl
& GEN8_DE_PORT_IRQ
) {
2290 iir
= I915_READ(GEN8_DE_PORT_IIR
);
2295 I915_WRITE(GEN8_DE_PORT_IIR
, iir
);
2298 tmp_mask
= GEN8_AUX_CHANNEL_A
;
2299 if (INTEL_INFO(dev_priv
)->gen
>= 9)
2300 tmp_mask
|= GEN9_AUX_CHANNEL_B
|
2301 GEN9_AUX_CHANNEL_C
|
2304 if (iir
& tmp_mask
) {
2305 dp_aux_irq_handler(dev
);
2309 if (IS_BROXTON(dev_priv
)) {
2310 tmp_mask
= iir
& BXT_DE_PORT_HOTPLUG_MASK
;
2312 bxt_hpd_irq_handler(dev
, tmp_mask
, hpd_bxt
);
2315 } else if (IS_BROADWELL(dev_priv
)) {
2316 tmp_mask
= iir
& GEN8_PORT_DP_A_HOTPLUG
;
2318 ilk_hpd_irq_handler(dev
, tmp_mask
, hpd_bdw
);
2323 if (IS_BROXTON(dev
) && (iir
& BXT_DE_PORT_GMBUS
)) {
2324 gmbus_irq_handler(dev
);
2329 DRM_ERROR("Unexpected DE Port interrupt\n");
2332 DRM_ERROR("The master control interrupt lied (DE PORT)!\n");
2335 for_each_pipe(dev_priv
, pipe
) {
2336 u32 flip_done
, fault_errors
;
2338 if (!(master_ctl
& GEN8_DE_PIPE_IRQ(pipe
)))
2341 iir
= I915_READ(GEN8_DE_PIPE_IIR(pipe
));
2343 DRM_ERROR("The master control interrupt lied (DE PIPE)!\n");
2348 I915_WRITE(GEN8_DE_PIPE_IIR(pipe
), iir
);
2350 if (iir
& GEN8_PIPE_VBLANK
&&
2351 intel_pipe_handle_vblank(dev
, pipe
))
2352 intel_check_page_flip(dev
, pipe
);
2355 if (INTEL_INFO(dev_priv
)->gen
>= 9)
2356 flip_done
&= GEN9_PIPE_PLANE1_FLIP_DONE
;
2358 flip_done
&= GEN8_PIPE_PRIMARY_FLIP_DONE
;
2361 intel_prepare_page_flip(dev
, pipe
);
2362 intel_finish_page_flip_plane(dev
, pipe
);
2365 if (iir
& GEN8_PIPE_CDCLK_CRC_DONE
)
2366 hsw_pipe_crc_irq_handler(dev
, pipe
);
2368 if (iir
& GEN8_PIPE_FIFO_UNDERRUN
)
2369 intel_cpu_fifo_underrun_irq_handler(dev_priv
, pipe
);
2372 if (INTEL_INFO(dev_priv
)->gen
>= 9)
2373 fault_errors
&= GEN9_DE_PIPE_IRQ_FAULT_ERRORS
;
2375 fault_errors
&= GEN8_DE_PIPE_IRQ_FAULT_ERRORS
;
2378 DRM_ERROR("Fault errors on pipe %c\n: 0x%08x",
2383 if (HAS_PCH_SPLIT(dev
) && !HAS_PCH_NOP(dev
) &&
2384 master_ctl
& GEN8_DE_PCH_IRQ
) {
2386 * FIXME(BDW): Assume for now that the new interrupt handling
2387 * scheme also closed the SDE interrupt handling race we've seen
2388 * on older pch-split platforms. But this needs testing.
2390 iir
= I915_READ(SDEIIR
);
2392 I915_WRITE(SDEIIR
, iir
);
2395 if (HAS_PCH_SPT(dev_priv
))
2396 spt_irq_handler(dev
, iir
);
2398 cpt_irq_handler(dev
, iir
);
2401 * Like on previous PCH there seems to be something
2402 * fishy going on with forwarding PCH interrupts.
2404 DRM_DEBUG_DRIVER("The master control interrupt lied (SDE)!\n");
2411 static irqreturn_t
gen8_irq_handler(int irq
, void *arg
)
2413 struct drm_device
*dev
= arg
;
2414 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2418 if (!intel_irqs_enabled(dev_priv
))
2421 master_ctl
= I915_READ_FW(GEN8_MASTER_IRQ
);
2422 master_ctl
&= ~GEN8_MASTER_IRQ_CONTROL
;
2426 I915_WRITE_FW(GEN8_MASTER_IRQ
, 0);
2428 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2429 disable_rpm_wakeref_asserts(dev_priv
);
2431 /* Find, clear, then process each source of interrupt */
2432 ret
= gen8_gt_irq_handler(dev_priv
, master_ctl
);
2433 ret
|= gen8_de_irq_handler(dev_priv
, master_ctl
);
2435 I915_WRITE_FW(GEN8_MASTER_IRQ
, GEN8_MASTER_IRQ_CONTROL
);
2436 POSTING_READ_FW(GEN8_MASTER_IRQ
);
2438 enable_rpm_wakeref_asserts(dev_priv
);
2443 static void i915_error_wake_up(struct drm_i915_private
*dev_priv
,
2444 bool reset_completed
)
2446 struct intel_engine_cs
*ring
;
2450 * Notify all waiters for GPU completion events that reset state has
2451 * been changed, and that they need to restart their wait after
2452 * checking for potential errors (and bail out to drop locks if there is
2453 * a gpu reset pending so that i915_error_work_func can acquire them).
2456 /* Wake up __wait_seqno, potentially holding dev->struct_mutex. */
2457 for_each_ring(ring
, dev_priv
, i
)
2458 wake_up_all(&ring
->irq_queue
);
2460 /* Wake up intel_crtc_wait_for_pending_flips, holding crtc->mutex. */
2461 wake_up_all(&dev_priv
->pending_flip_queue
);
2464 * Signal tasks blocked in i915_gem_wait_for_error that the pending
2465 * reset state is cleared.
2467 if (reset_completed
)
2468 wake_up_all(&dev_priv
->gpu_error
.reset_queue
);
2472 * i915_reset_and_wakeup - do process context error handling work
2475 * Fire an error uevent so userspace can see that a hang or error
2478 static void i915_reset_and_wakeup(struct drm_device
*dev
)
2480 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2481 struct i915_gpu_error
*error
= &dev_priv
->gpu_error
;
2482 char *error_event
[] = { I915_ERROR_UEVENT
"=1", NULL
};
2483 char *reset_event
[] = { I915_RESET_UEVENT
"=1", NULL
};
2484 char *reset_done_event
[] = { I915_ERROR_UEVENT
"=0", NULL
};
2487 kobject_uevent_env(&dev
->primary
->kdev
->kobj
, KOBJ_CHANGE
, error_event
);
2490 * Note that there's only one work item which does gpu resets, so we
2491 * need not worry about concurrent gpu resets potentially incrementing
2492 * error->reset_counter twice. We only need to take care of another
2493 * racing irq/hangcheck declaring the gpu dead for a second time. A
2494 * quick check for that is good enough: schedule_work ensures the
2495 * correct ordering between hang detection and this work item, and since
2496 * the reset in-progress bit is only ever set by code outside of this
2497 * work we don't need to worry about any other races.
2499 if (i915_reset_in_progress(error
) && !i915_terminally_wedged(error
)) {
2500 DRM_DEBUG_DRIVER("resetting chip\n");
2501 kobject_uevent_env(&dev
->primary
->kdev
->kobj
, KOBJ_CHANGE
,
2505 * In most cases it's guaranteed that we get here with an RPM
2506 * reference held, for example because there is a pending GPU
2507 * request that won't finish until the reset is done. This
2508 * isn't the case at least when we get here by doing a
2509 * simulated reset via debugs, so get an RPM reference.
2511 intel_runtime_pm_get(dev_priv
);
2513 intel_prepare_reset(dev
);
2516 * All state reset _must_ be completed before we update the
2517 * reset counter, for otherwise waiters might miss the reset
2518 * pending state and not properly drop locks, resulting in
2519 * deadlocks with the reset work.
2521 ret
= i915_reset(dev
);
2523 intel_finish_reset(dev
);
2525 intel_runtime_pm_put(dev_priv
);
2529 * After all the gem state is reset, increment the reset
2530 * counter and wake up everyone waiting for the reset to
2533 * Since unlock operations are a one-sided barrier only,
2534 * we need to insert a barrier here to order any seqno
2536 * the counter increment.
2538 smp_mb__before_atomic();
2539 atomic_inc(&dev_priv
->gpu_error
.reset_counter
);
2541 kobject_uevent_env(&dev
->primary
->kdev
->kobj
,
2542 KOBJ_CHANGE
, reset_done_event
);
2544 atomic_or(I915_WEDGED
, &error
->reset_counter
);
2548 * Note: The wake_up also serves as a memory barrier so that
2549 * waiters see the update value of the reset counter atomic_t.
2551 i915_error_wake_up(dev_priv
, true);
2555 static void i915_report_and_clear_eir(struct drm_device
*dev
)
2557 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2558 uint32_t instdone
[I915_NUM_INSTDONE_REG
];
2559 u32 eir
= I915_READ(EIR
);
2565 pr_err("render error detected, EIR: 0x%08x\n", eir
);
2567 i915_get_extra_instdone(dev
, instdone
);
2570 if (eir
& (GM45_ERROR_MEM_PRIV
| GM45_ERROR_CP_PRIV
)) {
2571 u32 ipeir
= I915_READ(IPEIR_I965
);
2573 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965
));
2574 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965
));
2575 for (i
= 0; i
< ARRAY_SIZE(instdone
); i
++)
2576 pr_err(" INSTDONE_%d: 0x%08x\n", i
, instdone
[i
]);
2577 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS
));
2578 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965
));
2579 I915_WRITE(IPEIR_I965
, ipeir
);
2580 POSTING_READ(IPEIR_I965
);
2582 if (eir
& GM45_ERROR_PAGE_TABLE
) {
2583 u32 pgtbl_err
= I915_READ(PGTBL_ER
);
2584 pr_err("page table error\n");
2585 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err
);
2586 I915_WRITE(PGTBL_ER
, pgtbl_err
);
2587 POSTING_READ(PGTBL_ER
);
2591 if (!IS_GEN2(dev
)) {
2592 if (eir
& I915_ERROR_PAGE_TABLE
) {
2593 u32 pgtbl_err
= I915_READ(PGTBL_ER
);
2594 pr_err("page table error\n");
2595 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err
);
2596 I915_WRITE(PGTBL_ER
, pgtbl_err
);
2597 POSTING_READ(PGTBL_ER
);
2601 if (eir
& I915_ERROR_MEMORY_REFRESH
) {
2602 pr_err("memory refresh error:\n");
2603 for_each_pipe(dev_priv
, pipe
)
2604 pr_err("pipe %c stat: 0x%08x\n",
2605 pipe_name(pipe
), I915_READ(PIPESTAT(pipe
)));
2606 /* pipestat has already been acked */
2608 if (eir
& I915_ERROR_INSTRUCTION
) {
2609 pr_err("instruction error\n");
2610 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM
));
2611 for (i
= 0; i
< ARRAY_SIZE(instdone
); i
++)
2612 pr_err(" INSTDONE_%d: 0x%08x\n", i
, instdone
[i
]);
2613 if (INTEL_INFO(dev
)->gen
< 4) {
2614 u32 ipeir
= I915_READ(IPEIR
);
2616 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR
));
2617 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR
));
2618 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD
));
2619 I915_WRITE(IPEIR
, ipeir
);
2620 POSTING_READ(IPEIR
);
2622 u32 ipeir
= I915_READ(IPEIR_I965
);
2624 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965
));
2625 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965
));
2626 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS
));
2627 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965
));
2628 I915_WRITE(IPEIR_I965
, ipeir
);
2629 POSTING_READ(IPEIR_I965
);
2633 I915_WRITE(EIR
, eir
);
2635 eir
= I915_READ(EIR
);
2638 * some errors might have become stuck,
2641 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir
);
2642 I915_WRITE(EMR
, I915_READ(EMR
) | eir
);
2643 I915_WRITE(IIR
, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
2648 * i915_handle_error - handle a gpu error
2651 * Do some basic checking of register state at error time and
2652 * dump it to the syslog. Also call i915_capture_error_state() to make
2653 * sure we get a record and make it available in debugfs. Fire a uevent
2654 * so userspace knows something bad happened (should trigger collection
2655 * of a ring dump etc.).
2657 void i915_handle_error(struct drm_device
*dev
, bool wedged
,
2658 const char *fmt
, ...)
2660 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2664 va_start(args
, fmt
);
2665 vscnprintf(error_msg
, sizeof(error_msg
), fmt
, args
);
2668 i915_capture_error_state(dev
, wedged
, error_msg
);
2669 i915_report_and_clear_eir(dev
);
2672 atomic_or(I915_RESET_IN_PROGRESS_FLAG
,
2673 &dev_priv
->gpu_error
.reset_counter
);
2676 * Wakeup waiting processes so that the reset function
2677 * i915_reset_and_wakeup doesn't deadlock trying to grab
2678 * various locks. By bumping the reset counter first, the woken
2679 * processes will see a reset in progress and back off,
2680 * releasing their locks and then wait for the reset completion.
2681 * We must do this for _all_ gpu waiters that might hold locks
2682 * that the reset work needs to acquire.
2684 * Note: The wake_up serves as the required memory barrier to
2685 * ensure that the waiters see the updated value of the reset
2688 i915_error_wake_up(dev_priv
, false);
2691 i915_reset_and_wakeup(dev
);
2694 /* Called from drm generic code, passed 'crtc' which
2695 * we use as a pipe index
2697 static int i915_enable_vblank(struct drm_device
*dev
, unsigned int pipe
)
2699 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2700 unsigned long irqflags
;
2702 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2703 if (INTEL_INFO(dev
)->gen
>= 4)
2704 i915_enable_pipestat(dev_priv
, pipe
,
2705 PIPE_START_VBLANK_INTERRUPT_STATUS
);
2707 i915_enable_pipestat(dev_priv
, pipe
,
2708 PIPE_VBLANK_INTERRUPT_STATUS
);
2709 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2714 static int ironlake_enable_vblank(struct drm_device
*dev
, unsigned int pipe
)
2716 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2717 unsigned long irqflags
;
2718 uint32_t bit
= (INTEL_INFO(dev
)->gen
>= 7) ? DE_PIPE_VBLANK_IVB(pipe
) :
2719 DE_PIPE_VBLANK(pipe
);
2721 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2722 ilk_enable_display_irq(dev_priv
, bit
);
2723 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2728 static int valleyview_enable_vblank(struct drm_device
*dev
, unsigned int pipe
)
2730 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2731 unsigned long irqflags
;
2733 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2734 i915_enable_pipestat(dev_priv
, pipe
,
2735 PIPE_START_VBLANK_INTERRUPT_STATUS
);
2736 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2741 static int gen8_enable_vblank(struct drm_device
*dev
, unsigned int pipe
)
2743 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2744 unsigned long irqflags
;
2746 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2747 bdw_enable_pipe_irq(dev_priv
, pipe
, GEN8_PIPE_VBLANK
);
2748 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2753 /* Called from drm generic code, passed 'crtc' which
2754 * we use as a pipe index
2756 static void i915_disable_vblank(struct drm_device
*dev
, unsigned int pipe
)
2758 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2759 unsigned long irqflags
;
2761 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2762 i915_disable_pipestat(dev_priv
, pipe
,
2763 PIPE_VBLANK_INTERRUPT_STATUS
|
2764 PIPE_START_VBLANK_INTERRUPT_STATUS
);
2765 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2768 static void ironlake_disable_vblank(struct drm_device
*dev
, unsigned int pipe
)
2770 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2771 unsigned long irqflags
;
2772 uint32_t bit
= (INTEL_INFO(dev
)->gen
>= 7) ? DE_PIPE_VBLANK_IVB(pipe
) :
2773 DE_PIPE_VBLANK(pipe
);
2775 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2776 ilk_disable_display_irq(dev_priv
, bit
);
2777 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2780 static void valleyview_disable_vblank(struct drm_device
*dev
, unsigned int pipe
)
2782 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2783 unsigned long irqflags
;
2785 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2786 i915_disable_pipestat(dev_priv
, pipe
,
2787 PIPE_START_VBLANK_INTERRUPT_STATUS
);
2788 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2791 static void gen8_disable_vblank(struct drm_device
*dev
, unsigned int pipe
)
2793 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2794 unsigned long irqflags
;
2796 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2797 bdw_disable_pipe_irq(dev_priv
, pipe
, GEN8_PIPE_VBLANK
);
2798 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2802 ring_idle(struct intel_engine_cs
*ring
, u32 seqno
)
2804 return (list_empty(&ring
->request_list
) ||
2805 i915_seqno_passed(seqno
, ring
->last_submitted_seqno
));
2809 ipehr_is_semaphore_wait(struct drm_device
*dev
, u32 ipehr
)
2811 if (INTEL_INFO(dev
)->gen
>= 8) {
2812 return (ipehr
>> 23) == 0x1c;
2814 ipehr
&= ~MI_SEMAPHORE_SYNC_MASK
;
2815 return ipehr
== (MI_SEMAPHORE_MBOX
| MI_SEMAPHORE_COMPARE
|
2816 MI_SEMAPHORE_REGISTER
);
2820 static struct intel_engine_cs
*
2821 semaphore_wait_to_signaller_ring(struct intel_engine_cs
*ring
, u32 ipehr
, u64 offset
)
2823 struct drm_i915_private
*dev_priv
= ring
->dev
->dev_private
;
2824 struct intel_engine_cs
*signaller
;
2827 if (INTEL_INFO(dev_priv
->dev
)->gen
>= 8) {
2828 for_each_ring(signaller
, dev_priv
, i
) {
2829 if (ring
== signaller
)
2832 if (offset
== signaller
->semaphore
.signal_ggtt
[ring
->id
])
2836 u32 sync_bits
= ipehr
& MI_SEMAPHORE_SYNC_MASK
;
2838 for_each_ring(signaller
, dev_priv
, i
) {
2839 if(ring
== signaller
)
2842 if (sync_bits
== signaller
->semaphore
.mbox
.wait
[ring
->id
])
2847 DRM_ERROR("No signaller ring found for ring %i, ipehr 0x%08x, offset 0x%016llx\n",
2848 ring
->id
, ipehr
, offset
);
2853 static struct intel_engine_cs
*
2854 semaphore_waits_for(struct intel_engine_cs
*ring
, u32
*seqno
)
2856 struct drm_i915_private
*dev_priv
= ring
->dev
->dev_private
;
2857 u32 cmd
, ipehr
, head
;
2862 * This function does not support execlist mode - any attempt to
2863 * proceed further into this function will result in a kernel panic
2864 * when dereferencing ring->buffer, which is not set up in execlist
2867 * The correct way of doing it would be to derive the currently
2868 * executing ring buffer from the current context, which is derived
2869 * from the currently running request. Unfortunately, to get the
2870 * current request we would have to grab the struct_mutex before doing
2871 * anything else, which would be ill-advised since some other thread
2872 * might have grabbed it already and managed to hang itself, causing
2873 * the hang checker to deadlock.
2875 * Therefore, this function does not support execlist mode in its
2876 * current form. Just return NULL and move on.
2878 if (ring
->buffer
== NULL
)
2881 ipehr
= I915_READ(RING_IPEHR(ring
->mmio_base
));
2882 if (!ipehr_is_semaphore_wait(ring
->dev
, ipehr
))
2886 * HEAD is likely pointing to the dword after the actual command,
2887 * so scan backwards until we find the MBOX. But limit it to just 3
2888 * or 4 dwords depending on the semaphore wait command size.
2889 * Note that we don't care about ACTHD here since that might
2890 * point at at batch, and semaphores are always emitted into the
2891 * ringbuffer itself.
2893 head
= I915_READ_HEAD(ring
) & HEAD_ADDR
;
2894 backwards
= (INTEL_INFO(ring
->dev
)->gen
>= 8) ? 5 : 4;
2896 for (i
= backwards
; i
; --i
) {
2898 * Be paranoid and presume the hw has gone off into the wild -
2899 * our ring is smaller than what the hardware (and hence
2900 * HEAD_ADDR) allows. Also handles wrap-around.
2902 head
&= ring
->buffer
->size
- 1;
2904 /* This here seems to blow up */
2905 cmd
= ioread32(ring
->buffer
->virtual_start
+ head
);
2915 *seqno
= ioread32(ring
->buffer
->virtual_start
+ head
+ 4) + 1;
2916 if (INTEL_INFO(ring
->dev
)->gen
>= 8) {
2917 offset
= ioread32(ring
->buffer
->virtual_start
+ head
+ 12);
2919 offset
= ioread32(ring
->buffer
->virtual_start
+ head
+ 8);
2921 return semaphore_wait_to_signaller_ring(ring
, ipehr
, offset
);
2924 static int semaphore_passed(struct intel_engine_cs
*ring
)
2926 struct drm_i915_private
*dev_priv
= ring
->dev
->dev_private
;
2927 struct intel_engine_cs
*signaller
;
2930 ring
->hangcheck
.deadlock
++;
2932 signaller
= semaphore_waits_for(ring
, &seqno
);
2933 if (signaller
== NULL
)
2936 /* Prevent pathological recursion due to driver bugs */
2937 if (signaller
->hangcheck
.deadlock
>= I915_NUM_RINGS
)
2940 if (i915_seqno_passed(signaller
->get_seqno(signaller
, false), seqno
))
2943 /* cursory check for an unkickable deadlock */
2944 if (I915_READ_CTL(signaller
) & RING_WAIT_SEMAPHORE
&&
2945 semaphore_passed(signaller
) < 0)
2951 static void semaphore_clear_deadlocks(struct drm_i915_private
*dev_priv
)
2953 struct intel_engine_cs
*ring
;
2956 for_each_ring(ring
, dev_priv
, i
)
2957 ring
->hangcheck
.deadlock
= 0;
2960 static bool subunits_stuck(struct intel_engine_cs
*ring
)
2962 u32 instdone
[I915_NUM_INSTDONE_REG
];
2966 if (ring
->id
!= RCS
)
2969 i915_get_extra_instdone(ring
->dev
, instdone
);
2971 /* There might be unstable subunit states even when
2972 * actual head is not moving. Filter out the unstable ones by
2973 * accumulating the undone -> done transitions and only
2974 * consider those as progress.
2977 for (i
= 0; i
< I915_NUM_INSTDONE_REG
; i
++) {
2978 const u32 tmp
= instdone
[i
] | ring
->hangcheck
.instdone
[i
];
2980 if (tmp
!= ring
->hangcheck
.instdone
[i
])
2983 ring
->hangcheck
.instdone
[i
] |= tmp
;
2989 static enum intel_ring_hangcheck_action
2990 head_stuck(struct intel_engine_cs
*ring
, u64 acthd
)
2992 if (acthd
!= ring
->hangcheck
.acthd
) {
2994 /* Clear subunit states on head movement */
2995 memset(ring
->hangcheck
.instdone
, 0,
2996 sizeof(ring
->hangcheck
.instdone
));
2998 if (acthd
> ring
->hangcheck
.max_acthd
) {
2999 ring
->hangcheck
.max_acthd
= acthd
;
3000 return HANGCHECK_ACTIVE
;
3003 return HANGCHECK_ACTIVE_LOOP
;
3006 if (!subunits_stuck(ring
))
3007 return HANGCHECK_ACTIVE
;
3009 return HANGCHECK_HUNG
;
3012 static enum intel_ring_hangcheck_action
3013 ring_stuck(struct intel_engine_cs
*ring
, u64 acthd
)
3015 struct drm_device
*dev
= ring
->dev
;
3016 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3017 enum intel_ring_hangcheck_action ha
;
3020 ha
= head_stuck(ring
, acthd
);
3021 if (ha
!= HANGCHECK_HUNG
)
3025 return HANGCHECK_HUNG
;
3027 /* Is the chip hanging on a WAIT_FOR_EVENT?
3028 * If so we can simply poke the RB_WAIT bit
3029 * and break the hang. This should work on
3030 * all but the second generation chipsets.
3032 tmp
= I915_READ_CTL(ring
);
3033 if (tmp
& RING_WAIT
) {
3034 i915_handle_error(dev
, false,
3035 "Kicking stuck wait on %s",
3037 I915_WRITE_CTL(ring
, tmp
);
3038 return HANGCHECK_KICK
;
3041 if (INTEL_INFO(dev
)->gen
>= 6 && tmp
& RING_WAIT_SEMAPHORE
) {
3042 switch (semaphore_passed(ring
)) {
3044 return HANGCHECK_HUNG
;
3046 i915_handle_error(dev
, false,
3047 "Kicking stuck semaphore on %s",
3049 I915_WRITE_CTL(ring
, tmp
);
3050 return HANGCHECK_KICK
;
3052 return HANGCHECK_WAIT
;
3056 return HANGCHECK_HUNG
;
3060 * This is called when the chip hasn't reported back with completed
3061 * batchbuffers in a long time. We keep track per ring seqno progress and
3062 * if there are no progress, hangcheck score for that ring is increased.
3063 * Further, acthd is inspected to see if the ring is stuck. On stuck case
3064 * we kick the ring. If we see no progress on three subsequent calls
3065 * we assume chip is wedged and try to fix it by resetting the chip.
3067 static void i915_hangcheck_elapsed(struct work_struct
*work
)
3069 struct drm_i915_private
*dev_priv
=
3070 container_of(work
, typeof(*dev_priv
),
3071 gpu_error
.hangcheck_work
.work
);
3072 struct drm_device
*dev
= dev_priv
->dev
;
3073 struct intel_engine_cs
*ring
;
3075 int busy_count
= 0, rings_hung
= 0;
3076 bool stuck
[I915_NUM_RINGS
] = { 0 };
3081 if (!i915
.enable_hangcheck
)
3085 * The hangcheck work is synced during runtime suspend, we don't
3086 * require a wakeref. TODO: instead of disabling the asserts make
3087 * sure that we hold a reference when this work is running.
3089 DISABLE_RPM_WAKEREF_ASSERTS(dev_priv
);
3091 /* As enabling the GPU requires fairly extensive mmio access,
3092 * periodically arm the mmio checker to see if we are triggering
3093 * any invalid access.
3095 intel_uncore_arm_unclaimed_mmio_detection(dev_priv
);
3097 for_each_ring(ring
, dev_priv
, i
) {
3102 semaphore_clear_deadlocks(dev_priv
);
3104 seqno
= ring
->get_seqno(ring
, false);
3105 acthd
= intel_ring_get_active_head(ring
);
3107 if (ring
->hangcheck
.seqno
== seqno
) {
3108 if (ring_idle(ring
, seqno
)) {
3109 ring
->hangcheck
.action
= HANGCHECK_IDLE
;
3111 if (waitqueue_active(&ring
->irq_queue
)) {
3112 /* Issue a wake-up to catch stuck h/w. */
3113 if (!test_and_set_bit(ring
->id
, &dev_priv
->gpu_error
.missed_irq_rings
)) {
3114 if (!(dev_priv
->gpu_error
.test_irq_rings
& intel_ring_flag(ring
)))
3115 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
3118 DRM_INFO("Fake missed irq on %s\n",
3120 wake_up_all(&ring
->irq_queue
);
3122 /* Safeguard against driver failure */
3123 ring
->hangcheck
.score
+= BUSY
;
3127 /* We always increment the hangcheck score
3128 * if the ring is busy and still processing
3129 * the same request, so that no single request
3130 * can run indefinitely (such as a chain of
3131 * batches). The only time we do not increment
3132 * the hangcheck score on this ring, if this
3133 * ring is in a legitimate wait for another
3134 * ring. In that case the waiting ring is a
3135 * victim and we want to be sure we catch the
3136 * right culprit. Then every time we do kick
3137 * the ring, add a small increment to the
3138 * score so that we can catch a batch that is
3139 * being repeatedly kicked and so responsible
3140 * for stalling the machine.
3142 ring
->hangcheck
.action
= ring_stuck(ring
,
3145 switch (ring
->hangcheck
.action
) {
3146 case HANGCHECK_IDLE
:
3147 case HANGCHECK_WAIT
:
3148 case HANGCHECK_ACTIVE
:
3150 case HANGCHECK_ACTIVE_LOOP
:
3151 ring
->hangcheck
.score
+= BUSY
;
3153 case HANGCHECK_KICK
:
3154 ring
->hangcheck
.score
+= KICK
;
3156 case HANGCHECK_HUNG
:
3157 ring
->hangcheck
.score
+= HUNG
;
3163 ring
->hangcheck
.action
= HANGCHECK_ACTIVE
;
3165 /* Gradually reduce the count so that we catch DoS
3166 * attempts across multiple batches.
3168 if (ring
->hangcheck
.score
> 0)
3169 ring
->hangcheck
.score
--;
3171 /* Clear head and subunit states on seqno movement */
3172 ring
->hangcheck
.acthd
= ring
->hangcheck
.max_acthd
= 0;
3174 memset(ring
->hangcheck
.instdone
, 0,
3175 sizeof(ring
->hangcheck
.instdone
));
3178 ring
->hangcheck
.seqno
= seqno
;
3179 ring
->hangcheck
.acthd
= acthd
;
3183 for_each_ring(ring
, dev_priv
, i
) {
3184 if (ring
->hangcheck
.score
>= HANGCHECK_SCORE_RING_HUNG
) {
3185 DRM_INFO("%s on %s\n",
3186 stuck
[i
] ? "stuck" : "no progress",
3193 i915_handle_error(dev
, true, "Ring hung");
3198 /* Reset timer case chip hangs without another request
3200 i915_queue_hangcheck(dev
);
3203 ENABLE_RPM_WAKEREF_ASSERTS(dev_priv
);
3206 void i915_queue_hangcheck(struct drm_device
*dev
)
3208 struct i915_gpu_error
*e
= &to_i915(dev
)->gpu_error
;
3210 if (!i915
.enable_hangcheck
)
3213 /* Don't continually defer the hangcheck so that it is always run at
3214 * least once after work has been scheduled on any ring. Otherwise,
3215 * we will ignore a hung ring if a second ring is kept busy.
3218 queue_delayed_work(e
->hangcheck_wq
, &e
->hangcheck_work
,
3219 round_jiffies_up_relative(DRM_I915_HANGCHECK_JIFFIES
));
3222 static void ibx_irq_reset(struct drm_device
*dev
)
3224 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3226 if (HAS_PCH_NOP(dev
))
3229 GEN5_IRQ_RESET(SDE
);
3231 if (HAS_PCH_CPT(dev
) || HAS_PCH_LPT(dev
))
3232 I915_WRITE(SERR_INT
, 0xffffffff);
3236 * SDEIER is also touched by the interrupt handler to work around missed PCH
3237 * interrupts. Hence we can't update it after the interrupt handler is enabled -
3238 * instead we unconditionally enable all PCH interrupt sources here, but then
3239 * only unmask them as needed with SDEIMR.
3241 * This function needs to be called before interrupts are enabled.
3243 static void ibx_irq_pre_postinstall(struct drm_device
*dev
)
3245 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3247 if (HAS_PCH_NOP(dev
))
3250 WARN_ON(I915_READ(SDEIER
) != 0);
3251 I915_WRITE(SDEIER
, 0xffffffff);
3252 POSTING_READ(SDEIER
);
3255 static void gen5_gt_irq_reset(struct drm_device
*dev
)
3257 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3260 if (INTEL_INFO(dev
)->gen
>= 6)
3261 GEN5_IRQ_RESET(GEN6_PM
);
3266 static void ironlake_irq_reset(struct drm_device
*dev
)
3268 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3270 I915_WRITE(HWSTAM
, 0xffffffff);
3274 I915_WRITE(GEN7_ERR_INT
, 0xffffffff);
3276 gen5_gt_irq_reset(dev
);
3281 static void vlv_display_irq_reset(struct drm_i915_private
*dev_priv
)
3285 i915_hotplug_interrupt_update(dev_priv
, 0xFFFFFFFF, 0);
3286 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
3288 for_each_pipe(dev_priv
, pipe
)
3289 I915_WRITE(PIPESTAT(pipe
), 0xffff);
3291 GEN5_IRQ_RESET(VLV_
);
3294 static void valleyview_irq_preinstall(struct drm_device
*dev
)
3296 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3299 I915_WRITE(VLV_IMR
, 0);
3300 I915_WRITE(RING_IMR(RENDER_RING_BASE
), 0);
3301 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE
), 0);
3302 I915_WRITE(RING_IMR(BLT_RING_BASE
), 0);
3304 gen5_gt_irq_reset(dev
);
3306 I915_WRITE(DPINVGTT
, DPINVGTT_STATUS_MASK
);
3308 vlv_display_irq_reset(dev_priv
);
3311 static void gen8_gt_irq_reset(struct drm_i915_private
*dev_priv
)
3313 GEN8_IRQ_RESET_NDX(GT
, 0);
3314 GEN8_IRQ_RESET_NDX(GT
, 1);
3315 GEN8_IRQ_RESET_NDX(GT
, 2);
3316 GEN8_IRQ_RESET_NDX(GT
, 3);
3319 static void gen8_irq_reset(struct drm_device
*dev
)
3321 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3324 I915_WRITE(GEN8_MASTER_IRQ
, 0);
3325 POSTING_READ(GEN8_MASTER_IRQ
);
3327 gen8_gt_irq_reset(dev_priv
);
3329 for_each_pipe(dev_priv
, pipe
)
3330 if (intel_display_power_is_enabled(dev_priv
,
3331 POWER_DOMAIN_PIPE(pipe
)))
3332 GEN8_IRQ_RESET_NDX(DE_PIPE
, pipe
);
3334 GEN5_IRQ_RESET(GEN8_DE_PORT_
);
3335 GEN5_IRQ_RESET(GEN8_DE_MISC_
);
3336 GEN5_IRQ_RESET(GEN8_PCU_
);
3338 if (HAS_PCH_SPLIT(dev
))
3342 void gen8_irq_power_well_post_enable(struct drm_i915_private
*dev_priv
,
3343 unsigned int pipe_mask
)
3345 uint32_t extra_ier
= GEN8_PIPE_VBLANK
| GEN8_PIPE_FIFO_UNDERRUN
;
3347 spin_lock_irq(&dev_priv
->irq_lock
);
3348 if (pipe_mask
& 1 << PIPE_A
)
3349 GEN8_IRQ_INIT_NDX(DE_PIPE
, PIPE_A
,
3350 dev_priv
->de_irq_mask
[PIPE_A
],
3351 ~dev_priv
->de_irq_mask
[PIPE_A
] | extra_ier
);
3352 if (pipe_mask
& 1 << PIPE_B
)
3353 GEN8_IRQ_INIT_NDX(DE_PIPE
, PIPE_B
,
3354 dev_priv
->de_irq_mask
[PIPE_B
],
3355 ~dev_priv
->de_irq_mask
[PIPE_B
] | extra_ier
);
3356 if (pipe_mask
& 1 << PIPE_C
)
3357 GEN8_IRQ_INIT_NDX(DE_PIPE
, PIPE_C
,
3358 dev_priv
->de_irq_mask
[PIPE_C
],
3359 ~dev_priv
->de_irq_mask
[PIPE_C
] | extra_ier
);
3360 spin_unlock_irq(&dev_priv
->irq_lock
);
3363 static void cherryview_irq_preinstall(struct drm_device
*dev
)
3365 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3367 I915_WRITE(GEN8_MASTER_IRQ
, 0);
3368 POSTING_READ(GEN8_MASTER_IRQ
);
3370 gen8_gt_irq_reset(dev_priv
);
3372 GEN5_IRQ_RESET(GEN8_PCU_
);
3374 I915_WRITE(DPINVGTT
, DPINVGTT_STATUS_MASK_CHV
);
3376 vlv_display_irq_reset(dev_priv
);
3379 static u32
intel_hpd_enabled_irqs(struct drm_device
*dev
,
3380 const u32 hpd
[HPD_NUM_PINS
])
3382 struct drm_i915_private
*dev_priv
= to_i915(dev
);
3383 struct intel_encoder
*encoder
;
3384 u32 enabled_irqs
= 0;
3386 for_each_intel_encoder(dev
, encoder
)
3387 if (dev_priv
->hotplug
.stats
[encoder
->hpd_pin
].state
== HPD_ENABLED
)
3388 enabled_irqs
|= hpd
[encoder
->hpd_pin
];
3390 return enabled_irqs
;
3393 static void ibx_hpd_irq_setup(struct drm_device
*dev
)
3395 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3396 u32 hotplug_irqs
, hotplug
, enabled_irqs
;
3398 if (HAS_PCH_IBX(dev
)) {
3399 hotplug_irqs
= SDE_HOTPLUG_MASK
;
3400 enabled_irqs
= intel_hpd_enabled_irqs(dev
, hpd_ibx
);
3402 hotplug_irqs
= SDE_HOTPLUG_MASK_CPT
;
3403 enabled_irqs
= intel_hpd_enabled_irqs(dev
, hpd_cpt
);
3406 ibx_display_interrupt_update(dev_priv
, hotplug_irqs
, enabled_irqs
);
3409 * Enable digital hotplug on the PCH, and configure the DP short pulse
3410 * duration to 2ms (which is the minimum in the Display Port spec).
3411 * The pulse duration bits are reserved on LPT+.
3413 hotplug
= I915_READ(PCH_PORT_HOTPLUG
);
3414 hotplug
&= ~(PORTD_PULSE_DURATION_MASK
|PORTC_PULSE_DURATION_MASK
|PORTB_PULSE_DURATION_MASK
);
3415 hotplug
|= PORTD_HOTPLUG_ENABLE
| PORTD_PULSE_DURATION_2ms
;
3416 hotplug
|= PORTC_HOTPLUG_ENABLE
| PORTC_PULSE_DURATION_2ms
;
3417 hotplug
|= PORTB_HOTPLUG_ENABLE
| PORTB_PULSE_DURATION_2ms
;
3419 * When CPU and PCH are on the same package, port A
3420 * HPD must be enabled in both north and south.
3422 if (HAS_PCH_LPT_LP(dev
))
3423 hotplug
|= PORTA_HOTPLUG_ENABLE
;
3424 I915_WRITE(PCH_PORT_HOTPLUG
, hotplug
);
3427 static void spt_hpd_irq_setup(struct drm_device
*dev
)
3429 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3430 u32 hotplug_irqs
, hotplug
, enabled_irqs
;
3432 hotplug_irqs
= SDE_HOTPLUG_MASK_SPT
;
3433 enabled_irqs
= intel_hpd_enabled_irqs(dev
, hpd_spt
);
3435 ibx_display_interrupt_update(dev_priv
, hotplug_irqs
, enabled_irqs
);
3437 /* Enable digital hotplug on the PCH */
3438 hotplug
= I915_READ(PCH_PORT_HOTPLUG
);
3439 hotplug
|= PORTD_HOTPLUG_ENABLE
| PORTC_HOTPLUG_ENABLE
|
3440 PORTB_HOTPLUG_ENABLE
| PORTA_HOTPLUG_ENABLE
;
3441 I915_WRITE(PCH_PORT_HOTPLUG
, hotplug
);
3443 hotplug
= I915_READ(PCH_PORT_HOTPLUG2
);
3444 hotplug
|= PORTE_HOTPLUG_ENABLE
;
3445 I915_WRITE(PCH_PORT_HOTPLUG2
, hotplug
);
3448 static void ilk_hpd_irq_setup(struct drm_device
*dev
)
3450 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3451 u32 hotplug_irqs
, hotplug
, enabled_irqs
;
3453 if (INTEL_INFO(dev
)->gen
>= 8) {
3454 hotplug_irqs
= GEN8_PORT_DP_A_HOTPLUG
;
3455 enabled_irqs
= intel_hpd_enabled_irqs(dev
, hpd_bdw
);
3457 bdw_update_port_irq(dev_priv
, hotplug_irqs
, enabled_irqs
);
3458 } else if (INTEL_INFO(dev
)->gen
>= 7) {
3459 hotplug_irqs
= DE_DP_A_HOTPLUG_IVB
;
3460 enabled_irqs
= intel_hpd_enabled_irqs(dev
, hpd_ivb
);
3462 ilk_update_display_irq(dev_priv
, hotplug_irqs
, enabled_irqs
);
3464 hotplug_irqs
= DE_DP_A_HOTPLUG
;
3465 enabled_irqs
= intel_hpd_enabled_irqs(dev
, hpd_ilk
);
3467 ilk_update_display_irq(dev_priv
, hotplug_irqs
, enabled_irqs
);
3471 * Enable digital hotplug on the CPU, and configure the DP short pulse
3472 * duration to 2ms (which is the minimum in the Display Port spec)
3473 * The pulse duration bits are reserved on HSW+.
3475 hotplug
= I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL
);
3476 hotplug
&= ~DIGITAL_PORTA_PULSE_DURATION_MASK
;
3477 hotplug
|= DIGITAL_PORTA_HOTPLUG_ENABLE
| DIGITAL_PORTA_PULSE_DURATION_2ms
;
3478 I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL
, hotplug
);
3480 ibx_hpd_irq_setup(dev
);
3483 static void bxt_hpd_irq_setup(struct drm_device
*dev
)
3485 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3486 u32 hotplug_irqs
, hotplug
, enabled_irqs
;
3488 enabled_irqs
= intel_hpd_enabled_irqs(dev
, hpd_bxt
);
3489 hotplug_irqs
= BXT_DE_PORT_HOTPLUG_MASK
;
3491 bdw_update_port_irq(dev_priv
, hotplug_irqs
, enabled_irqs
);
3493 hotplug
= I915_READ(PCH_PORT_HOTPLUG
);
3494 hotplug
|= PORTC_HOTPLUG_ENABLE
| PORTB_HOTPLUG_ENABLE
|
3495 PORTA_HOTPLUG_ENABLE
;
3496 I915_WRITE(PCH_PORT_HOTPLUG
, hotplug
);
3499 static void ibx_irq_postinstall(struct drm_device
*dev
)
3501 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3504 if (HAS_PCH_NOP(dev
))
3507 if (HAS_PCH_IBX(dev
))
3508 mask
= SDE_GMBUS
| SDE_AUX_MASK
| SDE_POISON
;
3510 mask
= SDE_GMBUS_CPT
| SDE_AUX_MASK_CPT
;
3512 gen5_assert_iir_is_zero(dev_priv
, SDEIIR
);
3513 I915_WRITE(SDEIMR
, ~mask
);
3516 static void gen5_gt_irq_postinstall(struct drm_device
*dev
)
3518 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3519 u32 pm_irqs
, gt_irqs
;
3521 pm_irqs
= gt_irqs
= 0;
3523 dev_priv
->gt_irq_mask
= ~0;
3524 if (HAS_L3_DPF(dev
)) {
3525 /* L3 parity interrupt is always unmasked. */
3526 dev_priv
->gt_irq_mask
= ~GT_PARITY_ERROR(dev
);
3527 gt_irqs
|= GT_PARITY_ERROR(dev
);
3530 gt_irqs
|= GT_RENDER_USER_INTERRUPT
;
3532 gt_irqs
|= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
|
3533 ILK_BSD_USER_INTERRUPT
;
3535 gt_irqs
|= GT_BLT_USER_INTERRUPT
| GT_BSD_USER_INTERRUPT
;
3538 GEN5_IRQ_INIT(GT
, dev_priv
->gt_irq_mask
, gt_irqs
);
3540 if (INTEL_INFO(dev
)->gen
>= 6) {
3542 * RPS interrupts will get enabled/disabled on demand when RPS
3543 * itself is enabled/disabled.
3546 pm_irqs
|= PM_VEBOX_USER_INTERRUPT
;
3548 dev_priv
->pm_irq_mask
= 0xffffffff;
3549 GEN5_IRQ_INIT(GEN6_PM
, dev_priv
->pm_irq_mask
, pm_irqs
);
3553 static int ironlake_irq_postinstall(struct drm_device
*dev
)
3555 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3556 u32 display_mask
, extra_mask
;
3558 if (INTEL_INFO(dev
)->gen
>= 7) {
3559 display_mask
= (DE_MASTER_IRQ_CONTROL
| DE_GSE_IVB
|
3560 DE_PCH_EVENT_IVB
| DE_PLANEC_FLIP_DONE_IVB
|
3561 DE_PLANEB_FLIP_DONE_IVB
|
3562 DE_PLANEA_FLIP_DONE_IVB
| DE_AUX_CHANNEL_A_IVB
);
3563 extra_mask
= (DE_PIPEC_VBLANK_IVB
| DE_PIPEB_VBLANK_IVB
|
3564 DE_PIPEA_VBLANK_IVB
| DE_ERR_INT_IVB
|
3565 DE_DP_A_HOTPLUG_IVB
);
3567 display_mask
= (DE_MASTER_IRQ_CONTROL
| DE_GSE
| DE_PCH_EVENT
|
3568 DE_PLANEA_FLIP_DONE
| DE_PLANEB_FLIP_DONE
|
3570 DE_PIPEB_CRC_DONE
| DE_PIPEA_CRC_DONE
|
3572 extra_mask
= (DE_PIPEA_VBLANK
| DE_PIPEB_VBLANK
| DE_PCU_EVENT
|
3573 DE_PIPEB_FIFO_UNDERRUN
| DE_PIPEA_FIFO_UNDERRUN
|
3577 dev_priv
->irq_mask
= ~display_mask
;
3579 I915_WRITE(HWSTAM
, 0xeffe);
3581 ibx_irq_pre_postinstall(dev
);
3583 GEN5_IRQ_INIT(DE
, dev_priv
->irq_mask
, display_mask
| extra_mask
);
3585 gen5_gt_irq_postinstall(dev
);
3587 ibx_irq_postinstall(dev
);
3589 if (IS_IRONLAKE_M(dev
)) {
3590 /* Enable PCU event interrupts
3592 * spinlocking not required here for correctness since interrupt
3593 * setup is guaranteed to run in single-threaded context. But we
3594 * need it to make the assert_spin_locked happy. */
3595 spin_lock_irq(&dev_priv
->irq_lock
);
3596 ilk_enable_display_irq(dev_priv
, DE_PCU_EVENT
);
3597 spin_unlock_irq(&dev_priv
->irq_lock
);
3603 static void valleyview_display_irqs_install(struct drm_i915_private
*dev_priv
)
3609 pipestat_mask
= PIPESTAT_INT_STATUS_MASK
|
3610 PIPE_FIFO_UNDERRUN_STATUS
;
3612 for_each_pipe(dev_priv
, pipe
)
3613 I915_WRITE(PIPESTAT(pipe
), pipestat_mask
);
3614 POSTING_READ(PIPESTAT(PIPE_A
));
3616 pipestat_mask
= PLANE_FLIP_DONE_INT_STATUS_VLV
|
3617 PIPE_CRC_DONE_INTERRUPT_STATUS
;
3619 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_GMBUS_INTERRUPT_STATUS
);
3620 for_each_pipe(dev_priv
, pipe
)
3621 i915_enable_pipestat(dev_priv
, pipe
, pipestat_mask
);
3623 iir_mask
= I915_DISPLAY_PORT_INTERRUPT
|
3624 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3625 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
;
3626 if (IS_CHERRYVIEW(dev_priv
))
3627 iir_mask
|= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT
;
3628 dev_priv
->irq_mask
&= ~iir_mask
;
3630 I915_WRITE(VLV_IIR
, iir_mask
);
3631 I915_WRITE(VLV_IIR
, iir_mask
);
3632 I915_WRITE(VLV_IER
, ~dev_priv
->irq_mask
);
3633 I915_WRITE(VLV_IMR
, dev_priv
->irq_mask
);
3634 POSTING_READ(VLV_IMR
);
3637 static void valleyview_display_irqs_uninstall(struct drm_i915_private
*dev_priv
)
3643 iir_mask
= I915_DISPLAY_PORT_INTERRUPT
|
3644 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3645 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
;
3646 if (IS_CHERRYVIEW(dev_priv
))
3647 iir_mask
|= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT
;
3649 dev_priv
->irq_mask
|= iir_mask
;
3650 I915_WRITE(VLV_IMR
, dev_priv
->irq_mask
);
3651 I915_WRITE(VLV_IER
, ~dev_priv
->irq_mask
);
3652 I915_WRITE(VLV_IIR
, iir_mask
);
3653 I915_WRITE(VLV_IIR
, iir_mask
);
3654 POSTING_READ(VLV_IIR
);
3656 pipestat_mask
= PLANE_FLIP_DONE_INT_STATUS_VLV
|
3657 PIPE_CRC_DONE_INTERRUPT_STATUS
;
3659 i915_disable_pipestat(dev_priv
, PIPE_A
, PIPE_GMBUS_INTERRUPT_STATUS
);
3660 for_each_pipe(dev_priv
, pipe
)
3661 i915_disable_pipestat(dev_priv
, pipe
, pipestat_mask
);
3663 pipestat_mask
= PIPESTAT_INT_STATUS_MASK
|
3664 PIPE_FIFO_UNDERRUN_STATUS
;
3666 for_each_pipe(dev_priv
, pipe
)
3667 I915_WRITE(PIPESTAT(pipe
), pipestat_mask
);
3668 POSTING_READ(PIPESTAT(PIPE_A
));
3671 void valleyview_enable_display_irqs(struct drm_i915_private
*dev_priv
)
3673 assert_spin_locked(&dev_priv
->irq_lock
);
3675 if (dev_priv
->display_irqs_enabled
)
3678 dev_priv
->display_irqs_enabled
= true;
3680 if (intel_irqs_enabled(dev_priv
))
3681 valleyview_display_irqs_install(dev_priv
);
3684 void valleyview_disable_display_irqs(struct drm_i915_private
*dev_priv
)
3686 assert_spin_locked(&dev_priv
->irq_lock
);
3688 if (!dev_priv
->display_irqs_enabled
)
3691 dev_priv
->display_irqs_enabled
= false;
3693 if (intel_irqs_enabled(dev_priv
))
3694 valleyview_display_irqs_uninstall(dev_priv
);
3697 static void vlv_display_irq_postinstall(struct drm_i915_private
*dev_priv
)
3699 dev_priv
->irq_mask
= ~0;
3701 i915_hotplug_interrupt_update(dev_priv
, 0xffffffff, 0);
3702 POSTING_READ(PORT_HOTPLUG_EN
);
3704 I915_WRITE(VLV_IIR
, 0xffffffff);
3705 I915_WRITE(VLV_IIR
, 0xffffffff);
3706 I915_WRITE(VLV_IER
, ~dev_priv
->irq_mask
);
3707 I915_WRITE(VLV_IMR
, dev_priv
->irq_mask
);
3708 POSTING_READ(VLV_IMR
);
3710 /* Interrupt setup is already guaranteed to be single-threaded, this is
3711 * just to make the assert_spin_locked check happy. */
3712 spin_lock_irq(&dev_priv
->irq_lock
);
3713 if (dev_priv
->display_irqs_enabled
)
3714 valleyview_display_irqs_install(dev_priv
);
3715 spin_unlock_irq(&dev_priv
->irq_lock
);
3718 static int valleyview_irq_postinstall(struct drm_device
*dev
)
3720 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3722 vlv_display_irq_postinstall(dev_priv
);
3724 gen5_gt_irq_postinstall(dev
);
3726 /* ack & enable invalid PTE error interrupts */
3727 #if 0 /* FIXME: add support to irq handler for checking these bits */
3728 I915_WRITE(DPINVGTT
, DPINVGTT_STATUS_MASK
);
3729 I915_WRITE(DPINVGTT
, DPINVGTT_EN_MASK
);
3732 I915_WRITE(VLV_MASTER_IER
, MASTER_INTERRUPT_ENABLE
);
3737 static void gen8_gt_irq_postinstall(struct drm_i915_private
*dev_priv
)
3739 /* These are interrupts we'll toggle with the ring mask register */
3740 uint32_t gt_interrupts
[] = {
3741 GT_RENDER_USER_INTERRUPT
<< GEN8_RCS_IRQ_SHIFT
|
3742 GT_CONTEXT_SWITCH_INTERRUPT
<< GEN8_RCS_IRQ_SHIFT
|
3743 GT_RENDER_L3_PARITY_ERROR_INTERRUPT
|
3744 GT_RENDER_USER_INTERRUPT
<< GEN8_BCS_IRQ_SHIFT
|
3745 GT_CONTEXT_SWITCH_INTERRUPT
<< GEN8_BCS_IRQ_SHIFT
,
3746 GT_RENDER_USER_INTERRUPT
<< GEN8_VCS1_IRQ_SHIFT
|
3747 GT_CONTEXT_SWITCH_INTERRUPT
<< GEN8_VCS1_IRQ_SHIFT
|
3748 GT_RENDER_USER_INTERRUPT
<< GEN8_VCS2_IRQ_SHIFT
|
3749 GT_CONTEXT_SWITCH_INTERRUPT
<< GEN8_VCS2_IRQ_SHIFT
,
3751 GT_RENDER_USER_INTERRUPT
<< GEN8_VECS_IRQ_SHIFT
|
3752 GT_CONTEXT_SWITCH_INTERRUPT
<< GEN8_VECS_IRQ_SHIFT
3755 dev_priv
->pm_irq_mask
= 0xffffffff;
3756 GEN8_IRQ_INIT_NDX(GT
, 0, ~gt_interrupts
[0], gt_interrupts
[0]);
3757 GEN8_IRQ_INIT_NDX(GT
, 1, ~gt_interrupts
[1], gt_interrupts
[1]);
3759 * RPS interrupts will get enabled/disabled on demand when RPS itself
3760 * is enabled/disabled.
3762 GEN8_IRQ_INIT_NDX(GT
, 2, dev_priv
->pm_irq_mask
, 0);
3763 GEN8_IRQ_INIT_NDX(GT
, 3, ~gt_interrupts
[3], gt_interrupts
[3]);
3766 static void gen8_de_irq_postinstall(struct drm_i915_private
*dev_priv
)
3768 uint32_t de_pipe_masked
= GEN8_PIPE_CDCLK_CRC_DONE
;
3769 uint32_t de_pipe_enables
;
3770 u32 de_port_masked
= GEN8_AUX_CHANNEL_A
;
3771 u32 de_port_enables
;
3774 if (INTEL_INFO(dev_priv
)->gen
>= 9) {
3775 de_pipe_masked
|= GEN9_PIPE_PLANE1_FLIP_DONE
|
3776 GEN9_DE_PIPE_IRQ_FAULT_ERRORS
;
3777 de_port_masked
|= GEN9_AUX_CHANNEL_B
| GEN9_AUX_CHANNEL_C
|
3779 if (IS_BROXTON(dev_priv
))
3780 de_port_masked
|= BXT_DE_PORT_GMBUS
;
3782 de_pipe_masked
|= GEN8_PIPE_PRIMARY_FLIP_DONE
|
3783 GEN8_DE_PIPE_IRQ_FAULT_ERRORS
;
3786 de_pipe_enables
= de_pipe_masked
| GEN8_PIPE_VBLANK
|
3787 GEN8_PIPE_FIFO_UNDERRUN
;
3789 de_port_enables
= de_port_masked
;
3790 if (IS_BROXTON(dev_priv
))
3791 de_port_enables
|= BXT_DE_PORT_HOTPLUG_MASK
;
3792 else if (IS_BROADWELL(dev_priv
))
3793 de_port_enables
|= GEN8_PORT_DP_A_HOTPLUG
;
3795 dev_priv
->de_irq_mask
[PIPE_A
] = ~de_pipe_masked
;
3796 dev_priv
->de_irq_mask
[PIPE_B
] = ~de_pipe_masked
;
3797 dev_priv
->de_irq_mask
[PIPE_C
] = ~de_pipe_masked
;
3799 for_each_pipe(dev_priv
, pipe
)
3800 if (intel_display_power_is_enabled(dev_priv
,
3801 POWER_DOMAIN_PIPE(pipe
)))
3802 GEN8_IRQ_INIT_NDX(DE_PIPE
, pipe
,
3803 dev_priv
->de_irq_mask
[pipe
],
3806 GEN5_IRQ_INIT(GEN8_DE_PORT_
, ~de_port_masked
, de_port_enables
);
3809 static int gen8_irq_postinstall(struct drm_device
*dev
)
3811 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3813 if (HAS_PCH_SPLIT(dev
))
3814 ibx_irq_pre_postinstall(dev
);
3816 gen8_gt_irq_postinstall(dev_priv
);
3817 gen8_de_irq_postinstall(dev_priv
);
3819 if (HAS_PCH_SPLIT(dev
))
3820 ibx_irq_postinstall(dev
);
3822 I915_WRITE(GEN8_MASTER_IRQ
, DE_MASTER_IRQ_CONTROL
);
3823 POSTING_READ(GEN8_MASTER_IRQ
);
3828 static int cherryview_irq_postinstall(struct drm_device
*dev
)
3830 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3832 vlv_display_irq_postinstall(dev_priv
);
3834 gen8_gt_irq_postinstall(dev_priv
);
3836 I915_WRITE(GEN8_MASTER_IRQ
, MASTER_INTERRUPT_ENABLE
);
3837 POSTING_READ(GEN8_MASTER_IRQ
);
3842 static void gen8_irq_uninstall(struct drm_device
*dev
)
3844 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3849 gen8_irq_reset(dev
);
3852 static void vlv_display_irq_uninstall(struct drm_i915_private
*dev_priv
)
3854 /* Interrupt setup is already guaranteed to be single-threaded, this is
3855 * just to make the assert_spin_locked check happy. */
3856 spin_lock_irq(&dev_priv
->irq_lock
);
3857 if (dev_priv
->display_irqs_enabled
)
3858 valleyview_display_irqs_uninstall(dev_priv
);
3859 spin_unlock_irq(&dev_priv
->irq_lock
);
3861 vlv_display_irq_reset(dev_priv
);
3863 dev_priv
->irq_mask
= ~0;
3866 static void valleyview_irq_uninstall(struct drm_device
*dev
)
3868 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3873 I915_WRITE(VLV_MASTER_IER
, 0);
3875 gen5_gt_irq_reset(dev
);
3877 I915_WRITE(HWSTAM
, 0xffffffff);
3879 vlv_display_irq_uninstall(dev_priv
);
3882 static void cherryview_irq_uninstall(struct drm_device
*dev
)
3884 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3889 I915_WRITE(GEN8_MASTER_IRQ
, 0);
3890 POSTING_READ(GEN8_MASTER_IRQ
);
3892 gen8_gt_irq_reset(dev_priv
);
3894 GEN5_IRQ_RESET(GEN8_PCU_
);
3896 vlv_display_irq_uninstall(dev_priv
);
3899 static void ironlake_irq_uninstall(struct drm_device
*dev
)
3901 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3906 ironlake_irq_reset(dev
);
3909 static void i8xx_irq_preinstall(struct drm_device
* dev
)
3911 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3914 for_each_pipe(dev_priv
, pipe
)
3915 I915_WRITE(PIPESTAT(pipe
), 0);
3916 I915_WRITE16(IMR
, 0xffff);
3917 I915_WRITE16(IER
, 0x0);
3918 POSTING_READ16(IER
);
3921 static int i8xx_irq_postinstall(struct drm_device
*dev
)
3923 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3926 ~(I915_ERROR_PAGE_TABLE
| I915_ERROR_MEMORY_REFRESH
));
3928 /* Unmask the interrupts that we always want on. */
3929 dev_priv
->irq_mask
=
3930 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3931 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
3932 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
3933 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
);
3934 I915_WRITE16(IMR
, dev_priv
->irq_mask
);
3937 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
3938 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
3939 I915_USER_INTERRUPT
);
3940 POSTING_READ16(IER
);
3942 /* Interrupt setup is already guaranteed to be single-threaded, this is
3943 * just to make the assert_spin_locked check happy. */
3944 spin_lock_irq(&dev_priv
->irq_lock
);
3945 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
3946 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
3947 spin_unlock_irq(&dev_priv
->irq_lock
);
3953 * Returns true when a page flip has completed.
3955 static bool i8xx_handle_vblank(struct drm_device
*dev
,
3956 int plane
, int pipe
, u32 iir
)
3958 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3959 u16 flip_pending
= DISPLAY_PLANE_FLIP_PENDING(plane
);
3961 if (!intel_pipe_handle_vblank(dev
, pipe
))
3964 if ((iir
& flip_pending
) == 0)
3965 goto check_page_flip
;
3967 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3968 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3969 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3970 * the flip is completed (no longer pending). Since this doesn't raise
3971 * an interrupt per se, we watch for the change at vblank.
3973 if (I915_READ16(ISR
) & flip_pending
)
3974 goto check_page_flip
;
3976 intel_prepare_page_flip(dev
, plane
);
3977 intel_finish_page_flip(dev
, pipe
);
3981 intel_check_page_flip(dev
, pipe
);
3985 static irqreturn_t
i8xx_irq_handler(int irq
, void *arg
)
3987 struct drm_device
*dev
= arg
;
3988 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3993 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
3994 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
3997 if (!intel_irqs_enabled(dev_priv
))
4000 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
4001 disable_rpm_wakeref_asserts(dev_priv
);
4004 iir
= I915_READ16(IIR
);
4008 while (iir
& ~flip_mask
) {
4009 /* Can't rely on pipestat interrupt bit in iir as it might
4010 * have been cleared after the pipestat interrupt was received.
4011 * It doesn't set the bit in iir again, but it still produces
4012 * interrupts (for non-MSI).
4014 spin_lock(&dev_priv
->irq_lock
);
4015 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
4016 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir
);
4018 for_each_pipe(dev_priv
, pipe
) {
4019 i915_reg_t reg
= PIPESTAT(pipe
);
4020 pipe_stats
[pipe
] = I915_READ(reg
);
4023 * Clear the PIPE*STAT regs before the IIR
4025 if (pipe_stats
[pipe
] & 0x8000ffff)
4026 I915_WRITE(reg
, pipe_stats
[pipe
]);
4028 spin_unlock(&dev_priv
->irq_lock
);
4030 I915_WRITE16(IIR
, iir
& ~flip_mask
);
4031 new_iir
= I915_READ16(IIR
); /* Flush posted writes */
4033 if (iir
& I915_USER_INTERRUPT
)
4034 notify_ring(&dev_priv
->ring
[RCS
]);
4036 for_each_pipe(dev_priv
, pipe
) {
4041 if (pipe_stats
[pipe
] & PIPE_VBLANK_INTERRUPT_STATUS
&&
4042 i8xx_handle_vblank(dev
, plane
, pipe
, iir
))
4043 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(plane
);
4045 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
4046 i9xx_pipe_crc_irq_handler(dev
, pipe
);
4048 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
4049 intel_cpu_fifo_underrun_irq_handler(dev_priv
,
4058 enable_rpm_wakeref_asserts(dev_priv
);
4063 static void i8xx_irq_uninstall(struct drm_device
* dev
)
4065 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4068 for_each_pipe(dev_priv
, pipe
) {
4069 /* Clear enable bits; then clear status bits */
4070 I915_WRITE(PIPESTAT(pipe
), 0);
4071 I915_WRITE(PIPESTAT(pipe
), I915_READ(PIPESTAT(pipe
)));
4073 I915_WRITE16(IMR
, 0xffff);
4074 I915_WRITE16(IER
, 0x0);
4075 I915_WRITE16(IIR
, I915_READ16(IIR
));
4078 static void i915_irq_preinstall(struct drm_device
* dev
)
4080 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4083 if (I915_HAS_HOTPLUG(dev
)) {
4084 i915_hotplug_interrupt_update(dev_priv
, 0xffffffff, 0);
4085 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
4088 I915_WRITE16(HWSTAM
, 0xeffe);
4089 for_each_pipe(dev_priv
, pipe
)
4090 I915_WRITE(PIPESTAT(pipe
), 0);
4091 I915_WRITE(IMR
, 0xffffffff);
4092 I915_WRITE(IER
, 0x0);
4096 static int i915_irq_postinstall(struct drm_device
*dev
)
4098 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4101 I915_WRITE(EMR
, ~(I915_ERROR_PAGE_TABLE
| I915_ERROR_MEMORY_REFRESH
));
4103 /* Unmask the interrupts that we always want on. */
4104 dev_priv
->irq_mask
=
4105 ~(I915_ASLE_INTERRUPT
|
4106 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
4107 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
4108 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4109 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
);
4112 I915_ASLE_INTERRUPT
|
4113 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
4114 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
4115 I915_USER_INTERRUPT
;
4117 if (I915_HAS_HOTPLUG(dev
)) {
4118 i915_hotplug_interrupt_update(dev_priv
, 0xffffffff, 0);
4119 POSTING_READ(PORT_HOTPLUG_EN
);
4121 /* Enable in IER... */
4122 enable_mask
|= I915_DISPLAY_PORT_INTERRUPT
;
4123 /* and unmask in IMR */
4124 dev_priv
->irq_mask
&= ~I915_DISPLAY_PORT_INTERRUPT
;
4127 I915_WRITE(IMR
, dev_priv
->irq_mask
);
4128 I915_WRITE(IER
, enable_mask
);
4131 i915_enable_asle_pipestat(dev
);
4133 /* Interrupt setup is already guaranteed to be single-threaded, this is
4134 * just to make the assert_spin_locked check happy. */
4135 spin_lock_irq(&dev_priv
->irq_lock
);
4136 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
4137 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
4138 spin_unlock_irq(&dev_priv
->irq_lock
);
4144 * Returns true when a page flip has completed.
4146 static bool i915_handle_vblank(struct drm_device
*dev
,
4147 int plane
, int pipe
, u32 iir
)
4149 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4150 u32 flip_pending
= DISPLAY_PLANE_FLIP_PENDING(plane
);
4152 if (!intel_pipe_handle_vblank(dev
, pipe
))
4155 if ((iir
& flip_pending
) == 0)
4156 goto check_page_flip
;
4158 /* We detect FlipDone by looking for the change in PendingFlip from '1'
4159 * to '0' on the following vblank, i.e. IIR has the Pendingflip
4160 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
4161 * the flip is completed (no longer pending). Since this doesn't raise
4162 * an interrupt per se, we watch for the change at vblank.
4164 if (I915_READ(ISR
) & flip_pending
)
4165 goto check_page_flip
;
4167 intel_prepare_page_flip(dev
, plane
);
4168 intel_finish_page_flip(dev
, pipe
);
4172 intel_check_page_flip(dev
, pipe
);
4176 static irqreturn_t
i915_irq_handler(int irq
, void *arg
)
4178 struct drm_device
*dev
= arg
;
4179 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4180 u32 iir
, new_iir
, pipe_stats
[I915_MAX_PIPES
];
4182 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4183 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
4184 int pipe
, ret
= IRQ_NONE
;
4186 if (!intel_irqs_enabled(dev_priv
))
4189 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
4190 disable_rpm_wakeref_asserts(dev_priv
);
4192 iir
= I915_READ(IIR
);
4194 bool irq_received
= (iir
& ~flip_mask
) != 0;
4195 bool blc_event
= false;
4197 /* Can't rely on pipestat interrupt bit in iir as it might
4198 * have been cleared after the pipestat interrupt was received.
4199 * It doesn't set the bit in iir again, but it still produces
4200 * interrupts (for non-MSI).
4202 spin_lock(&dev_priv
->irq_lock
);
4203 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
4204 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir
);
4206 for_each_pipe(dev_priv
, pipe
) {
4207 i915_reg_t reg
= PIPESTAT(pipe
);
4208 pipe_stats
[pipe
] = I915_READ(reg
);
4210 /* Clear the PIPE*STAT regs before the IIR */
4211 if (pipe_stats
[pipe
] & 0x8000ffff) {
4212 I915_WRITE(reg
, pipe_stats
[pipe
]);
4213 irq_received
= true;
4216 spin_unlock(&dev_priv
->irq_lock
);
4221 /* Consume port. Then clear IIR or we'll miss events */
4222 if (I915_HAS_HOTPLUG(dev
) &&
4223 iir
& I915_DISPLAY_PORT_INTERRUPT
)
4224 i9xx_hpd_irq_handler(dev
);
4226 I915_WRITE(IIR
, iir
& ~flip_mask
);
4227 new_iir
= I915_READ(IIR
); /* Flush posted writes */
4229 if (iir
& I915_USER_INTERRUPT
)
4230 notify_ring(&dev_priv
->ring
[RCS
]);
4232 for_each_pipe(dev_priv
, pipe
) {
4237 if (pipe_stats
[pipe
] & PIPE_VBLANK_INTERRUPT_STATUS
&&
4238 i915_handle_vblank(dev
, plane
, pipe
, iir
))
4239 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(plane
);
4241 if (pipe_stats
[pipe
] & PIPE_LEGACY_BLC_EVENT_STATUS
)
4244 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
4245 i9xx_pipe_crc_irq_handler(dev
, pipe
);
4247 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
4248 intel_cpu_fifo_underrun_irq_handler(dev_priv
,
4252 if (blc_event
|| (iir
& I915_ASLE_INTERRUPT
))
4253 intel_opregion_asle_intr(dev
);
4255 /* With MSI, interrupts are only generated when iir
4256 * transitions from zero to nonzero. If another bit got
4257 * set while we were handling the existing iir bits, then
4258 * we would never get another interrupt.
4260 * This is fine on non-MSI as well, as if we hit this path
4261 * we avoid exiting the interrupt handler only to generate
4264 * Note that for MSI this could cause a stray interrupt report
4265 * if an interrupt landed in the time between writing IIR and
4266 * the posting read. This should be rare enough to never
4267 * trigger the 99% of 100,000 interrupts test for disabling
4272 } while (iir
& ~flip_mask
);
4274 enable_rpm_wakeref_asserts(dev_priv
);
4279 static void i915_irq_uninstall(struct drm_device
* dev
)
4281 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4284 if (I915_HAS_HOTPLUG(dev
)) {
4285 i915_hotplug_interrupt_update(dev_priv
, 0xffffffff, 0);
4286 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
4289 I915_WRITE16(HWSTAM
, 0xffff);
4290 for_each_pipe(dev_priv
, pipe
) {
4291 /* Clear enable bits; then clear status bits */
4292 I915_WRITE(PIPESTAT(pipe
), 0);
4293 I915_WRITE(PIPESTAT(pipe
), I915_READ(PIPESTAT(pipe
)));
4295 I915_WRITE(IMR
, 0xffffffff);
4296 I915_WRITE(IER
, 0x0);
4298 I915_WRITE(IIR
, I915_READ(IIR
));
4301 static void i965_irq_preinstall(struct drm_device
* dev
)
4303 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4306 i915_hotplug_interrupt_update(dev_priv
, 0xffffffff, 0);
4307 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
4309 I915_WRITE(HWSTAM
, 0xeffe);
4310 for_each_pipe(dev_priv
, pipe
)
4311 I915_WRITE(PIPESTAT(pipe
), 0);
4312 I915_WRITE(IMR
, 0xffffffff);
4313 I915_WRITE(IER
, 0x0);
4317 static int i965_irq_postinstall(struct drm_device
*dev
)
4319 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4323 /* Unmask the interrupts that we always want on. */
4324 dev_priv
->irq_mask
= ~(I915_ASLE_INTERRUPT
|
4325 I915_DISPLAY_PORT_INTERRUPT
|
4326 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
4327 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
4328 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4329 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
|
4330 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
4332 enable_mask
= ~dev_priv
->irq_mask
;
4333 enable_mask
&= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4334 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
);
4335 enable_mask
|= I915_USER_INTERRUPT
;
4338 enable_mask
|= I915_BSD_USER_INTERRUPT
;
4340 /* Interrupt setup is already guaranteed to be single-threaded, this is
4341 * just to make the assert_spin_locked check happy. */
4342 spin_lock_irq(&dev_priv
->irq_lock
);
4343 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_GMBUS_INTERRUPT_STATUS
);
4344 i915_enable_pipestat(dev_priv
, PIPE_A
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
4345 i915_enable_pipestat(dev_priv
, PIPE_B
, PIPE_CRC_DONE_INTERRUPT_STATUS
);
4346 spin_unlock_irq(&dev_priv
->irq_lock
);
4349 * Enable some error detection, note the instruction error mask
4350 * bit is reserved, so we leave it masked.
4353 error_mask
= ~(GM45_ERROR_PAGE_TABLE
|
4354 GM45_ERROR_MEM_PRIV
|
4355 GM45_ERROR_CP_PRIV
|
4356 I915_ERROR_MEMORY_REFRESH
);
4358 error_mask
= ~(I915_ERROR_PAGE_TABLE
|
4359 I915_ERROR_MEMORY_REFRESH
);
4361 I915_WRITE(EMR
, error_mask
);
4363 I915_WRITE(IMR
, dev_priv
->irq_mask
);
4364 I915_WRITE(IER
, enable_mask
);
4367 i915_hotplug_interrupt_update(dev_priv
, 0xffffffff, 0);
4368 POSTING_READ(PORT_HOTPLUG_EN
);
4370 i915_enable_asle_pipestat(dev
);
4375 static void i915_hpd_irq_setup(struct drm_device
*dev
)
4377 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4380 assert_spin_locked(&dev_priv
->irq_lock
);
4382 /* Note HDMI and DP share hotplug bits */
4383 /* enable bits are the same for all generations */
4384 hotplug_en
= intel_hpd_enabled_irqs(dev
, hpd_mask_i915
);
4385 /* Programming the CRT detection parameters tends
4386 to generate a spurious hotplug event about three
4387 seconds later. So just do it once.
4390 hotplug_en
|= CRT_HOTPLUG_ACTIVATION_PERIOD_64
;
4391 hotplug_en
|= CRT_HOTPLUG_VOLTAGE_COMPARE_50
;
4393 /* Ignore TV since it's buggy */
4394 i915_hotplug_interrupt_update_locked(dev_priv
,
4395 HOTPLUG_INT_EN_MASK
|
4396 CRT_HOTPLUG_VOLTAGE_COMPARE_MASK
|
4397 CRT_HOTPLUG_ACTIVATION_PERIOD_64
,
4401 static irqreturn_t
i965_irq_handler(int irq
, void *arg
)
4403 struct drm_device
*dev
= arg
;
4404 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4406 u32 pipe_stats
[I915_MAX_PIPES
];
4407 int ret
= IRQ_NONE
, pipe
;
4409 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
4410 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
4412 if (!intel_irqs_enabled(dev_priv
))
4415 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
4416 disable_rpm_wakeref_asserts(dev_priv
);
4418 iir
= I915_READ(IIR
);
4421 bool irq_received
= (iir
& ~flip_mask
) != 0;
4422 bool blc_event
= false;
4424 /* Can't rely on pipestat interrupt bit in iir as it might
4425 * have been cleared after the pipestat interrupt was received.
4426 * It doesn't set the bit in iir again, but it still produces
4427 * interrupts (for non-MSI).
4429 spin_lock(&dev_priv
->irq_lock
);
4430 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
4431 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir
);
4433 for_each_pipe(dev_priv
, pipe
) {
4434 i915_reg_t reg
= PIPESTAT(pipe
);
4435 pipe_stats
[pipe
] = I915_READ(reg
);
4438 * Clear the PIPE*STAT regs before the IIR
4440 if (pipe_stats
[pipe
] & 0x8000ffff) {
4441 I915_WRITE(reg
, pipe_stats
[pipe
]);
4442 irq_received
= true;
4445 spin_unlock(&dev_priv
->irq_lock
);
4452 /* Consume port. Then clear IIR or we'll miss events */
4453 if (iir
& I915_DISPLAY_PORT_INTERRUPT
)
4454 i9xx_hpd_irq_handler(dev
);
4456 I915_WRITE(IIR
, iir
& ~flip_mask
);
4457 new_iir
= I915_READ(IIR
); /* Flush posted writes */
4459 if (iir
& I915_USER_INTERRUPT
)
4460 notify_ring(&dev_priv
->ring
[RCS
]);
4461 if (iir
& I915_BSD_USER_INTERRUPT
)
4462 notify_ring(&dev_priv
->ring
[VCS
]);
4464 for_each_pipe(dev_priv
, pipe
) {
4465 if (pipe_stats
[pipe
] & PIPE_START_VBLANK_INTERRUPT_STATUS
&&
4466 i915_handle_vblank(dev
, pipe
, pipe
, iir
))
4467 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(pipe
);
4469 if (pipe_stats
[pipe
] & PIPE_LEGACY_BLC_EVENT_STATUS
)
4472 if (pipe_stats
[pipe
] & PIPE_CRC_DONE_INTERRUPT_STATUS
)
4473 i9xx_pipe_crc_irq_handler(dev
, pipe
);
4475 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
4476 intel_cpu_fifo_underrun_irq_handler(dev_priv
, pipe
);
4479 if (blc_event
|| (iir
& I915_ASLE_INTERRUPT
))
4480 intel_opregion_asle_intr(dev
);
4482 if (pipe_stats
[0] & PIPE_GMBUS_INTERRUPT_STATUS
)
4483 gmbus_irq_handler(dev
);
4485 /* With MSI, interrupts are only generated when iir
4486 * transitions from zero to nonzero. If another bit got
4487 * set while we were handling the existing iir bits, then
4488 * we would never get another interrupt.
4490 * This is fine on non-MSI as well, as if we hit this path
4491 * we avoid exiting the interrupt handler only to generate
4494 * Note that for MSI this could cause a stray interrupt report
4495 * if an interrupt landed in the time between writing IIR and
4496 * the posting read. This should be rare enough to never
4497 * trigger the 99% of 100,000 interrupts test for disabling
4503 enable_rpm_wakeref_asserts(dev_priv
);
4508 static void i965_irq_uninstall(struct drm_device
* dev
)
4510 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4516 i915_hotplug_interrupt_update(dev_priv
, 0xffffffff, 0);
4517 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
4519 I915_WRITE(HWSTAM
, 0xffffffff);
4520 for_each_pipe(dev_priv
, pipe
)
4521 I915_WRITE(PIPESTAT(pipe
), 0);
4522 I915_WRITE(IMR
, 0xffffffff);
4523 I915_WRITE(IER
, 0x0);
4525 for_each_pipe(dev_priv
, pipe
)
4526 I915_WRITE(PIPESTAT(pipe
),
4527 I915_READ(PIPESTAT(pipe
)) & 0x8000ffff);
4528 I915_WRITE(IIR
, I915_READ(IIR
));
4532 * intel_irq_init - initializes irq support
4533 * @dev_priv: i915 device instance
4535 * This function initializes all the irq support including work items, timers
4536 * and all the vtables. It does not setup the interrupt itself though.
4538 void intel_irq_init(struct drm_i915_private
*dev_priv
)
4540 struct drm_device
*dev
= dev_priv
->dev
;
4542 intel_hpd_init_work(dev_priv
);
4544 INIT_WORK(&dev_priv
->rps
.work
, gen6_pm_rps_work
);
4545 INIT_WORK(&dev_priv
->l3_parity
.error_work
, ivybridge_parity_work
);
4547 /* Let's track the enabled rps events */
4548 if (IS_VALLEYVIEW(dev_priv
))
4549 /* WaGsvRC0ResidencyMethod:vlv */
4550 dev_priv
->pm_rps_events
= GEN6_PM_RP_DOWN_EI_EXPIRED
| GEN6_PM_RP_UP_EI_EXPIRED
;
4552 dev_priv
->pm_rps_events
= GEN6_PM_RPS_EVENTS
;
4554 INIT_DELAYED_WORK(&dev_priv
->gpu_error
.hangcheck_work
,
4555 i915_hangcheck_elapsed
);
4557 pm_qos_add_request(&dev_priv
->pm_qos
, PM_QOS_CPU_DMA_LATENCY
, PM_QOS_DEFAULT_VALUE
);
4559 if (IS_GEN2(dev_priv
)) {
4560 dev
->max_vblank_count
= 0;
4561 dev
->driver
->get_vblank_counter
= i8xx_get_vblank_counter
;
4562 } else if (IS_G4X(dev_priv
) || INTEL_INFO(dev_priv
)->gen
>= 5) {
4563 dev
->max_vblank_count
= 0xffffffff; /* full 32 bit counter */
4564 dev
->driver
->get_vblank_counter
= g4x_get_vblank_counter
;
4566 dev
->driver
->get_vblank_counter
= i915_get_vblank_counter
;
4567 dev
->max_vblank_count
= 0xffffff; /* only 24 bits of frame count */
4571 * Opt out of the vblank disable timer on everything except gen2.
4572 * Gen2 doesn't have a hardware frame counter and so depends on
4573 * vblank interrupts to produce sane vblank seuquence numbers.
4575 if (!IS_GEN2(dev_priv
))
4576 dev
->vblank_disable_immediate
= true;
4578 dev
->driver
->get_vblank_timestamp
= i915_get_vblank_timestamp
;
4579 dev
->driver
->get_scanout_position
= i915_get_crtc_scanoutpos
;
4581 if (IS_CHERRYVIEW(dev_priv
)) {
4582 dev
->driver
->irq_handler
= cherryview_irq_handler
;
4583 dev
->driver
->irq_preinstall
= cherryview_irq_preinstall
;
4584 dev
->driver
->irq_postinstall
= cherryview_irq_postinstall
;
4585 dev
->driver
->irq_uninstall
= cherryview_irq_uninstall
;
4586 dev
->driver
->enable_vblank
= valleyview_enable_vblank
;
4587 dev
->driver
->disable_vblank
= valleyview_disable_vblank
;
4588 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
4589 } else if (IS_VALLEYVIEW(dev_priv
)) {
4590 dev
->driver
->irq_handler
= valleyview_irq_handler
;
4591 dev
->driver
->irq_preinstall
= valleyview_irq_preinstall
;
4592 dev
->driver
->irq_postinstall
= valleyview_irq_postinstall
;
4593 dev
->driver
->irq_uninstall
= valleyview_irq_uninstall
;
4594 dev
->driver
->enable_vblank
= valleyview_enable_vblank
;
4595 dev
->driver
->disable_vblank
= valleyview_disable_vblank
;
4596 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
4597 } else if (INTEL_INFO(dev_priv
)->gen
>= 8) {
4598 dev
->driver
->irq_handler
= gen8_irq_handler
;
4599 dev
->driver
->irq_preinstall
= gen8_irq_reset
;
4600 dev
->driver
->irq_postinstall
= gen8_irq_postinstall
;
4601 dev
->driver
->irq_uninstall
= gen8_irq_uninstall
;
4602 dev
->driver
->enable_vblank
= gen8_enable_vblank
;
4603 dev
->driver
->disable_vblank
= gen8_disable_vblank
;
4604 if (IS_BROXTON(dev
))
4605 dev_priv
->display
.hpd_irq_setup
= bxt_hpd_irq_setup
;
4606 else if (HAS_PCH_SPT(dev
))
4607 dev_priv
->display
.hpd_irq_setup
= spt_hpd_irq_setup
;
4609 dev_priv
->display
.hpd_irq_setup
= ilk_hpd_irq_setup
;
4610 } else if (HAS_PCH_SPLIT(dev
)) {
4611 dev
->driver
->irq_handler
= ironlake_irq_handler
;
4612 dev
->driver
->irq_preinstall
= ironlake_irq_reset
;
4613 dev
->driver
->irq_postinstall
= ironlake_irq_postinstall
;
4614 dev
->driver
->irq_uninstall
= ironlake_irq_uninstall
;
4615 dev
->driver
->enable_vblank
= ironlake_enable_vblank
;
4616 dev
->driver
->disable_vblank
= ironlake_disable_vblank
;
4617 dev_priv
->display
.hpd_irq_setup
= ilk_hpd_irq_setup
;
4619 if (INTEL_INFO(dev_priv
)->gen
== 2) {
4620 dev
->driver
->irq_preinstall
= i8xx_irq_preinstall
;
4621 dev
->driver
->irq_postinstall
= i8xx_irq_postinstall
;
4622 dev
->driver
->irq_handler
= i8xx_irq_handler
;
4623 dev
->driver
->irq_uninstall
= i8xx_irq_uninstall
;
4624 } else if (INTEL_INFO(dev_priv
)->gen
== 3) {
4625 dev
->driver
->irq_preinstall
= i915_irq_preinstall
;
4626 dev
->driver
->irq_postinstall
= i915_irq_postinstall
;
4627 dev
->driver
->irq_uninstall
= i915_irq_uninstall
;
4628 dev
->driver
->irq_handler
= i915_irq_handler
;
4630 dev
->driver
->irq_preinstall
= i965_irq_preinstall
;
4631 dev
->driver
->irq_postinstall
= i965_irq_postinstall
;
4632 dev
->driver
->irq_uninstall
= i965_irq_uninstall
;
4633 dev
->driver
->irq_handler
= i965_irq_handler
;
4635 if (I915_HAS_HOTPLUG(dev_priv
))
4636 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
4637 dev
->driver
->enable_vblank
= i915_enable_vblank
;
4638 dev
->driver
->disable_vblank
= i915_disable_vblank
;
4643 * intel_irq_install - enables the hardware interrupt
4644 * @dev_priv: i915 device instance
4646 * This function enables the hardware interrupt handling, but leaves the hotplug
4647 * handling still disabled. It is called after intel_irq_init().
4649 * In the driver load and resume code we need working interrupts in a few places
4650 * but don't want to deal with the hassle of concurrent probe and hotplug
4651 * workers. Hence the split into this two-stage approach.
4653 int intel_irq_install(struct drm_i915_private
*dev_priv
)
4656 * We enable some interrupt sources in our postinstall hooks, so mark
4657 * interrupts as enabled _before_ actually enabling them to avoid
4658 * special cases in our ordering checks.
4660 dev_priv
->pm
.irqs_enabled
= true;
4662 return drm_irq_install(dev_priv
->dev
, dev_priv
->dev
->pdev
->irq
);
4666 * intel_irq_uninstall - finilizes all irq handling
4667 * @dev_priv: i915 device instance
4669 * This stops interrupt and hotplug handling and unregisters and frees all
4670 * resources acquired in the init functions.
4672 void intel_irq_uninstall(struct drm_i915_private
*dev_priv
)
4674 drm_irq_uninstall(dev_priv
->dev
);
4675 intel_hpd_cancel_work(dev_priv
);
4676 dev_priv
->pm
.irqs_enabled
= false;
4680 * intel_runtime_pm_disable_interrupts - runtime interrupt disabling
4681 * @dev_priv: i915 device instance
4683 * This function is used to disable interrupts at runtime, both in the runtime
4684 * pm and the system suspend/resume code.
4686 void intel_runtime_pm_disable_interrupts(struct drm_i915_private
*dev_priv
)
4688 dev_priv
->dev
->driver
->irq_uninstall(dev_priv
->dev
);
4689 dev_priv
->pm
.irqs_enabled
= false;
4690 synchronize_irq(dev_priv
->dev
->irq
);
4694 * intel_runtime_pm_enable_interrupts - runtime interrupt enabling
4695 * @dev_priv: i915 device instance
4697 * This function is used to enable interrupts at runtime, both in the runtime
4698 * pm and the system suspend/resume code.
4700 void intel_runtime_pm_enable_interrupts(struct drm_i915_private
*dev_priv
)
4702 dev_priv
->pm
.irqs_enabled
= true;
4703 dev_priv
->dev
->driver
->irq_preinstall(dev_priv
->dev
);
4704 dev_priv
->dev
->driver
->irq_postinstall(dev_priv
->dev
);