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drm/i915: fixup i915_pipe_enabled check in i915_irq.c
[deliverable/linux.git] / drivers / gpu / drm / i915 / i915_irq.c
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1/* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
2 */
3/*
4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
5 * All Rights Reserved.
6 *
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:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
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.
26 *
27 */
28
29#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30
31#include <linux/sysrq.h>
32#include <linux/slab.h>
33#include <drm/drmP.h>
34#include <drm/i915_drm.h>
35#include "i915_drv.h"
36#include "i915_trace.h"
37#include "intel_drv.h"
38
39static const u32 hpd_ibx[] = {
40 [HPD_CRT] = SDE_CRT_HOTPLUG,
41 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
42 [HPD_PORT_B] = SDE_PORTB_HOTPLUG,
43 [HPD_PORT_C] = SDE_PORTC_HOTPLUG,
44 [HPD_PORT_D] = SDE_PORTD_HOTPLUG
45};
46
47static const u32 hpd_cpt[] = {
48 [HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
49 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
50 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
51 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
52 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
53};
54
55static const u32 hpd_mask_i915[] = {
56 [HPD_CRT] = CRT_HOTPLUG_INT_EN,
57 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
58 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
59 [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
60 [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
61 [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
62};
63
64static const u32 hpd_status_gen4[] = {
65 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
66 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
67 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
68 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
69 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
70 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
71};
72
73static const u32 hpd_status_i965[] = {
74 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
75 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I965,
76 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I965,
77 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
78 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
79 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
80};
81
82static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */
83 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
84 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
85 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
86 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
87 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
88 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
89};
90
91static void ibx_hpd_irq_setup(struct drm_device *dev);
92static void i915_hpd_irq_setup(struct drm_device *dev);
93
94/* For display hotplug interrupt */
95static void
96ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
97{
98 if ((dev_priv->irq_mask & mask) != 0) {
99 dev_priv->irq_mask &= ~mask;
100 I915_WRITE(DEIMR, dev_priv->irq_mask);
101 POSTING_READ(DEIMR);
102 }
103}
104
105static void
106ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
107{
108 if ((dev_priv->irq_mask & mask) != mask) {
109 dev_priv->irq_mask |= mask;
110 I915_WRITE(DEIMR, dev_priv->irq_mask);
111 POSTING_READ(DEIMR);
112 }
113}
114
115static bool ivb_can_enable_err_int(struct drm_device *dev)
116{
117 struct drm_i915_private *dev_priv = dev->dev_private;
118 struct intel_crtc *crtc;
119 enum pipe pipe;
120
121 for_each_pipe(pipe) {
122 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
123
124 if (crtc->cpu_fifo_underrun_disabled)
125 return false;
126 }
127
128 return true;
129}
130
131static bool cpt_can_enable_serr_int(struct drm_device *dev)
132{
133 struct drm_i915_private *dev_priv = dev->dev_private;
134 enum pipe pipe;
135 struct intel_crtc *crtc;
136
137 for_each_pipe(pipe) {
138 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
139
140 if (crtc->pch_fifo_underrun_disabled)
141 return false;
142 }
143
144 return true;
145}
146
147static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev,
148 enum pipe pipe, bool enable)
149{
150 struct drm_i915_private *dev_priv = dev->dev_private;
151 uint32_t bit = (pipe == PIPE_A) ? DE_PIPEA_FIFO_UNDERRUN :
152 DE_PIPEB_FIFO_UNDERRUN;
153
154 if (enable)
155 ironlake_enable_display_irq(dev_priv, bit);
156 else
157 ironlake_disable_display_irq(dev_priv, bit);
158}
159
160static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev,
161 bool enable)
162{
163 struct drm_i915_private *dev_priv = dev->dev_private;
164
165 if (enable) {
166 if (!ivb_can_enable_err_int(dev))
167 return;
168
169 I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN_A |
170 ERR_INT_FIFO_UNDERRUN_B |
171 ERR_INT_FIFO_UNDERRUN_C);
172
173 ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
174 } else {
175 ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
176 }
177}
178
179static void ibx_set_fifo_underrun_reporting(struct intel_crtc *crtc,
180 bool enable)
181{
182 struct drm_device *dev = crtc->base.dev;
183 struct drm_i915_private *dev_priv = dev->dev_private;
184 uint32_t bit = (crtc->pipe == PIPE_A) ? SDE_TRANSA_FIFO_UNDER :
185 SDE_TRANSB_FIFO_UNDER;
186
187 if (enable)
188 I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~bit);
189 else
190 I915_WRITE(SDEIMR, I915_READ(SDEIMR) | bit);
191
192 POSTING_READ(SDEIMR);
193}
194
195static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
196 enum transcoder pch_transcoder,
197 bool enable)
198{
199 struct drm_i915_private *dev_priv = dev->dev_private;
200
201 if (enable) {
202 if (!cpt_can_enable_serr_int(dev))
203 return;
204
205 I915_WRITE(SERR_INT, SERR_INT_TRANS_A_FIFO_UNDERRUN |
206 SERR_INT_TRANS_B_FIFO_UNDERRUN |
207 SERR_INT_TRANS_C_FIFO_UNDERRUN);
208
209 I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~SDE_ERROR_CPT);
210 } else {
211 I915_WRITE(SDEIMR, I915_READ(SDEIMR) | SDE_ERROR_CPT);
212 }
213
214 POSTING_READ(SDEIMR);
215}
216
217/**
218 * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
219 * @dev: drm device
220 * @pipe: pipe
221 * @enable: true if we want to report FIFO underrun errors, false otherwise
222 *
223 * This function makes us disable or enable CPU fifo underruns for a specific
224 * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
225 * reporting for one pipe may also disable all the other CPU error interruts for
226 * the other pipes, due to the fact that there's just one interrupt mask/enable
227 * bit for all the pipes.
228 *
229 * Returns the previous state of underrun reporting.
230 */
231bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
232 enum pipe pipe, bool enable)
233{
234 struct drm_i915_private *dev_priv = dev->dev_private;
235 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
236 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
237 unsigned long flags;
238 bool ret;
239
240 spin_lock_irqsave(&dev_priv->irq_lock, flags);
241
242 ret = !intel_crtc->cpu_fifo_underrun_disabled;
243
244 if (enable == ret)
245 goto done;
246
247 intel_crtc->cpu_fifo_underrun_disabled = !enable;
248
249 if (IS_GEN5(dev) || IS_GEN6(dev))
250 ironlake_set_fifo_underrun_reporting(dev, pipe, enable);
251 else if (IS_GEN7(dev))
252 ivybridge_set_fifo_underrun_reporting(dev, enable);
253
254done:
255 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
256 return ret;
257}
258
259/**
260 * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
261 * @dev: drm device
262 * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
263 * @enable: true if we want to report FIFO underrun errors, false otherwise
264 *
265 * This function makes us disable or enable PCH fifo underruns for a specific
266 * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
267 * underrun reporting for one transcoder may also disable all the other PCH
268 * error interruts for the other transcoders, due to the fact that there's just
269 * one interrupt mask/enable bit for all the transcoders.
270 *
271 * Returns the previous state of underrun reporting.
272 */
273bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
274 enum transcoder pch_transcoder,
275 bool enable)
276{
277 struct drm_i915_private *dev_priv = dev->dev_private;
278 enum pipe p;
279 struct drm_crtc *crtc;
280 struct intel_crtc *intel_crtc;
281 unsigned long flags;
282 bool ret;
283
284 if (HAS_PCH_LPT(dev)) {
285 crtc = NULL;
286 for_each_pipe(p) {
287 struct drm_crtc *c = dev_priv->pipe_to_crtc_mapping[p];
288 if (intel_pipe_has_type(c, INTEL_OUTPUT_ANALOG)) {
289 crtc = c;
290 break;
291 }
292 }
293 if (!crtc) {
294 DRM_ERROR("PCH FIFO underrun, but no CRTC using the PCH found\n");
295 return false;
296 }
297 } else {
298 crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder];
299 }
300 intel_crtc = to_intel_crtc(crtc);
301
302 spin_lock_irqsave(&dev_priv->irq_lock, flags);
303
304 ret = !intel_crtc->pch_fifo_underrun_disabled;
305
306 if (enable == ret)
307 goto done;
308
309 intel_crtc->pch_fifo_underrun_disabled = !enable;
310
311 if (HAS_PCH_IBX(dev))
312 ibx_set_fifo_underrun_reporting(intel_crtc, enable);
313 else
314 cpt_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
315
316done:
317 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
318 return ret;
319}
320
321
322void
323i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
324{
325 u32 reg = PIPESTAT(pipe);
326 u32 pipestat = I915_READ(reg) & 0x7fff0000;
327
328 if ((pipestat & mask) == mask)
329 return;
330
331 /* Enable the interrupt, clear any pending status */
332 pipestat |= mask | (mask >> 16);
333 I915_WRITE(reg, pipestat);
334 POSTING_READ(reg);
335}
336
337void
338i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
339{
340 u32 reg = PIPESTAT(pipe);
341 u32 pipestat = I915_READ(reg) & 0x7fff0000;
342
343 if ((pipestat & mask) == 0)
344 return;
345
346 pipestat &= ~mask;
347 I915_WRITE(reg, pipestat);
348 POSTING_READ(reg);
349}
350
351/**
352 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
353 */
354static void i915_enable_asle_pipestat(struct drm_device *dev)
355{
356 drm_i915_private_t *dev_priv = dev->dev_private;
357 unsigned long irqflags;
358
359 if (!dev_priv->opregion.asle || !IS_MOBILE(dev))
360 return;
361
362 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
363
364 i915_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);
365 if (INTEL_INFO(dev)->gen >= 4)
366 i915_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
367
368 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
369}
370
371/**
372 * i915_pipe_enabled - check if a pipe is enabled
373 * @dev: DRM device
374 * @pipe: pipe to check
375 *
376 * Reading certain registers when the pipe is disabled can hang the chip.
377 * Use this routine to make sure the PLL is running and the pipe is active
378 * before reading such registers if unsure.
379 */
380static int
381i915_pipe_enabled(struct drm_device *dev, int pipe)
382{
383 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
384
385 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
386 /* Locking is horribly broken here, but whatever. */
387 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
388 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
389
390 return intel_crtc->active;
391 } else {
392 return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
393 }
394}
395
396/* Called from drm generic code, passed a 'crtc', which
397 * we use as a pipe index
398 */
399static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
400{
401 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
402 unsigned long high_frame;
403 unsigned long low_frame;
404 u32 high1, high2, low;
405
406 if (!i915_pipe_enabled(dev, pipe)) {
407 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
408 "pipe %c\n", pipe_name(pipe));
409 return 0;
410 }
411
412 high_frame = PIPEFRAME(pipe);
413 low_frame = PIPEFRAMEPIXEL(pipe);
414
415 /*
416 * High & low register fields aren't synchronized, so make sure
417 * we get a low value that's stable across two reads of the high
418 * register.
419 */
420 do {
421 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
422 low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
423 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
424 } while (high1 != high2);
425
426 high1 >>= PIPE_FRAME_HIGH_SHIFT;
427 low >>= PIPE_FRAME_LOW_SHIFT;
428 return (high1 << 8) | low;
429}
430
431static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
432{
433 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
434 int reg = PIPE_FRMCOUNT_GM45(pipe);
435
436 if (!i915_pipe_enabled(dev, pipe)) {
437 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
438 "pipe %c\n", pipe_name(pipe));
439 return 0;
440 }
441
442 return I915_READ(reg);
443}
444
445static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
446 int *vpos, int *hpos)
447{
448 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
449 u32 vbl = 0, position = 0;
450 int vbl_start, vbl_end, htotal, vtotal;
451 bool in_vbl = true;
452 int ret = 0;
453 enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
454 pipe);
455
456 if (!i915_pipe_enabled(dev, pipe)) {
457 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
458 "pipe %c\n", pipe_name(pipe));
459 return 0;
460 }
461
462 /* Get vtotal. */
463 vtotal = 1 + ((I915_READ(VTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
464
465 if (INTEL_INFO(dev)->gen >= 4) {
466 /* No obvious pixelcount register. Only query vertical
467 * scanout position from Display scan line register.
468 */
469 position = I915_READ(PIPEDSL(pipe));
470
471 /* Decode into vertical scanout position. Don't have
472 * horizontal scanout position.
473 */
474 *vpos = position & 0x1fff;
475 *hpos = 0;
476 } else {
477 /* Have access to pixelcount since start of frame.
478 * We can split this into vertical and horizontal
479 * scanout position.
480 */
481 position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
482
483 htotal = 1 + ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
484 *vpos = position / htotal;
485 *hpos = position - (*vpos * htotal);
486 }
487
488 /* Query vblank area. */
489 vbl = I915_READ(VBLANK(cpu_transcoder));
490
491 /* Test position against vblank region. */
492 vbl_start = vbl & 0x1fff;
493 vbl_end = (vbl >> 16) & 0x1fff;
494
495 if ((*vpos < vbl_start) || (*vpos > vbl_end))
496 in_vbl = false;
497
498 /* Inside "upper part" of vblank area? Apply corrective offset: */
499 if (in_vbl && (*vpos >= vbl_start))
500 *vpos = *vpos - vtotal;
501
502 /* Readouts valid? */
503 if (vbl > 0)
504 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
505
506 /* In vblank? */
507 if (in_vbl)
508 ret |= DRM_SCANOUTPOS_INVBL;
509
510 return ret;
511}
512
513static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
514 int *max_error,
515 struct timeval *vblank_time,
516 unsigned flags)
517{
518 struct drm_crtc *crtc;
519
520 if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) {
521 DRM_ERROR("Invalid crtc %d\n", pipe);
522 return -EINVAL;
523 }
524
525 /* Get drm_crtc to timestamp: */
526 crtc = intel_get_crtc_for_pipe(dev, pipe);
527 if (crtc == NULL) {
528 DRM_ERROR("Invalid crtc %d\n", pipe);
529 return -EINVAL;
530 }
531
532 if (!crtc->enabled) {
533 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
534 return -EBUSY;
535 }
536
537 /* Helper routine in DRM core does all the work: */
538 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
539 vblank_time, flags,
540 crtc);
541}
542
543static int intel_hpd_irq_event(struct drm_device *dev, struct drm_connector *connector)
544{
545 enum drm_connector_status old_status;
546
547 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
548 old_status = connector->status;
549
550 connector->status = connector->funcs->detect(connector, false);
551 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
552 connector->base.id,
553 drm_get_connector_name(connector),
554 old_status, connector->status);
555 return (old_status != connector->status);
556}
557
558/*
559 * Handle hotplug events outside the interrupt handler proper.
560 */
561#define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
562
563static void i915_hotplug_work_func(struct work_struct *work)
564{
565 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
566 hotplug_work);
567 struct drm_device *dev = dev_priv->dev;
568 struct drm_mode_config *mode_config = &dev->mode_config;
569 struct intel_connector *intel_connector;
570 struct intel_encoder *intel_encoder;
571 struct drm_connector *connector;
572 unsigned long irqflags;
573 bool hpd_disabled = false;
574 bool changed = false;
575 u32 hpd_event_bits;
576
577 /* HPD irq before everything is fully set up. */
578 if (!dev_priv->enable_hotplug_processing)
579 return;
580
581 mutex_lock(&mode_config->mutex);
582 DRM_DEBUG_KMS("running encoder hotplug functions\n");
583
584 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
585
586 hpd_event_bits = dev_priv->hpd_event_bits;
587 dev_priv->hpd_event_bits = 0;
588 list_for_each_entry(connector, &mode_config->connector_list, head) {
589 intel_connector = to_intel_connector(connector);
590 intel_encoder = intel_connector->encoder;
591 if (intel_encoder->hpd_pin > HPD_NONE &&
592 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
593 connector->polled == DRM_CONNECTOR_POLL_HPD) {
594 DRM_INFO("HPD interrupt storm detected on connector %s: "
595 "switching from hotplug detection to polling\n",
596 drm_get_connector_name(connector));
597 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED;
598 connector->polled = DRM_CONNECTOR_POLL_CONNECT
599 | DRM_CONNECTOR_POLL_DISCONNECT;
600 hpd_disabled = true;
601 }
602 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
603 DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
604 drm_get_connector_name(connector), intel_encoder->hpd_pin);
605 }
606 }
607 /* if there were no outputs to poll, poll was disabled,
608 * therefore make sure it's enabled when disabling HPD on
609 * some connectors */
610 if (hpd_disabled) {
611 drm_kms_helper_poll_enable(dev);
612 mod_timer(&dev_priv->hotplug_reenable_timer,
613 jiffies + msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY));
614 }
615
616 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
617
618 list_for_each_entry(connector, &mode_config->connector_list, head) {
619 intel_connector = to_intel_connector(connector);
620 intel_encoder = intel_connector->encoder;
621 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
622 if (intel_encoder->hot_plug)
623 intel_encoder->hot_plug(intel_encoder);
624 if (intel_hpd_irq_event(dev, connector))
625 changed = true;
626 }
627 }
628 mutex_unlock(&mode_config->mutex);
629
630 if (changed)
631 drm_kms_helper_hotplug_event(dev);
632}
633
634static void ironlake_handle_rps_change(struct drm_device *dev)
635{
636 drm_i915_private_t *dev_priv = dev->dev_private;
637 u32 busy_up, busy_down, max_avg, min_avg;
638 u8 new_delay;
639 unsigned long flags;
640
641 spin_lock_irqsave(&mchdev_lock, flags);
642
643 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
644
645 new_delay = dev_priv->ips.cur_delay;
646
647 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
648 busy_up = I915_READ(RCPREVBSYTUPAVG);
649 busy_down = I915_READ(RCPREVBSYTDNAVG);
650 max_avg = I915_READ(RCBMAXAVG);
651 min_avg = I915_READ(RCBMINAVG);
652
653 /* Handle RCS change request from hw */
654 if (busy_up > max_avg) {
655 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
656 new_delay = dev_priv->ips.cur_delay - 1;
657 if (new_delay < dev_priv->ips.max_delay)
658 new_delay = dev_priv->ips.max_delay;
659 } else if (busy_down < min_avg) {
660 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
661 new_delay = dev_priv->ips.cur_delay + 1;
662 if (new_delay > dev_priv->ips.min_delay)
663 new_delay = dev_priv->ips.min_delay;
664 }
665
666 if (ironlake_set_drps(dev, new_delay))
667 dev_priv->ips.cur_delay = new_delay;
668
669 spin_unlock_irqrestore(&mchdev_lock, flags);
670
671 return;
672}
673
674static void notify_ring(struct drm_device *dev,
675 struct intel_ring_buffer *ring)
676{
677 struct drm_i915_private *dev_priv = dev->dev_private;
678
679 if (ring->obj == NULL)
680 return;
681
682 trace_i915_gem_request_complete(ring, ring->get_seqno(ring, false));
683
684 wake_up_all(&ring->irq_queue);
685 if (i915_enable_hangcheck) {
686 dev_priv->gpu_error.hangcheck_count = 0;
687 mod_timer(&dev_priv->gpu_error.hangcheck_timer,
688 round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
689 }
690}
691
692static void gen6_pm_rps_work(struct work_struct *work)
693{
694 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
695 rps.work);
696 u32 pm_iir, pm_imr;
697 u8 new_delay;
698
699 spin_lock_irq(&dev_priv->rps.lock);
700 pm_iir = dev_priv->rps.pm_iir;
701 dev_priv->rps.pm_iir = 0;
702 pm_imr = I915_READ(GEN6_PMIMR);
703 I915_WRITE(GEN6_PMIMR, 0);
704 spin_unlock_irq(&dev_priv->rps.lock);
705
706 if ((pm_iir & GEN6_PM_DEFERRED_EVENTS) == 0)
707 return;
708
709 mutex_lock(&dev_priv->rps.hw_lock);
710
711 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD)
712 new_delay = dev_priv->rps.cur_delay + 1;
713 else
714 new_delay = dev_priv->rps.cur_delay - 1;
715
716 /* sysfs frequency interfaces may have snuck in while servicing the
717 * interrupt
718 */
719 if (!(new_delay > dev_priv->rps.max_delay ||
720 new_delay < dev_priv->rps.min_delay)) {
721 if (IS_VALLEYVIEW(dev_priv->dev))
722 valleyview_set_rps(dev_priv->dev, new_delay);
723 else
724 gen6_set_rps(dev_priv->dev, new_delay);
725 }
726
727 if (IS_VALLEYVIEW(dev_priv->dev)) {
728 /*
729 * On VLV, when we enter RC6 we may not be at the minimum
730 * voltage level, so arm a timer to check. It should only
731 * fire when there's activity or once after we've entered
732 * RC6, and then won't be re-armed until the next RPS interrupt.
733 */
734 mod_delayed_work(dev_priv->wq, &dev_priv->rps.vlv_work,
735 msecs_to_jiffies(100));
736 }
737
738 mutex_unlock(&dev_priv->rps.hw_lock);
739}
740
741
742/**
743 * ivybridge_parity_work - Workqueue called when a parity error interrupt
744 * occurred.
745 * @work: workqueue struct
746 *
747 * Doesn't actually do anything except notify userspace. As a consequence of
748 * this event, userspace should try to remap the bad rows since statistically
749 * it is likely the same row is more likely to go bad again.
750 */
751static void ivybridge_parity_work(struct work_struct *work)
752{
753 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
754 l3_parity.error_work);
755 u32 error_status, row, bank, subbank;
756 char *parity_event[5];
757 uint32_t misccpctl;
758 unsigned long flags;
759
760 /* We must turn off DOP level clock gating to access the L3 registers.
761 * In order to prevent a get/put style interface, acquire struct mutex
762 * any time we access those registers.
763 */
764 mutex_lock(&dev_priv->dev->struct_mutex);
765
766 misccpctl = I915_READ(GEN7_MISCCPCTL);
767 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
768 POSTING_READ(GEN7_MISCCPCTL);
769
770 error_status = I915_READ(GEN7_L3CDERRST1);
771 row = GEN7_PARITY_ERROR_ROW(error_status);
772 bank = GEN7_PARITY_ERROR_BANK(error_status);
773 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
774
775 I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID |
776 GEN7_L3CDERRST1_ENABLE);
777 POSTING_READ(GEN7_L3CDERRST1);
778
779 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
780
781 spin_lock_irqsave(&dev_priv->irq_lock, flags);
782 dev_priv->gt_irq_mask &= ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
783 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
784 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
785
786 mutex_unlock(&dev_priv->dev->struct_mutex);
787
788 parity_event[0] = "L3_PARITY_ERROR=1";
789 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
790 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
791 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
792 parity_event[4] = NULL;
793
794 kobject_uevent_env(&dev_priv->dev->primary->kdev.kobj,
795 KOBJ_CHANGE, parity_event);
796
797 DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
798 row, bank, subbank);
799
800 kfree(parity_event[3]);
801 kfree(parity_event[2]);
802 kfree(parity_event[1]);
803}
804
805static void ivybridge_handle_parity_error(struct drm_device *dev)
806{
807 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
808 unsigned long flags;
809
810 if (!HAS_L3_GPU_CACHE(dev))
811 return;
812
813 spin_lock_irqsave(&dev_priv->irq_lock, flags);
814 dev_priv->gt_irq_mask |= GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
815 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
816 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
817
818 queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
819}
820
821static void snb_gt_irq_handler(struct drm_device *dev,
822 struct drm_i915_private *dev_priv,
823 u32 gt_iir)
824{
825
826 if (gt_iir & (GEN6_RENDER_USER_INTERRUPT |
827 GEN6_RENDER_PIPE_CONTROL_NOTIFY_INTERRUPT))
828 notify_ring(dev, &dev_priv->ring[RCS]);
829 if (gt_iir & GEN6_BSD_USER_INTERRUPT)
830 notify_ring(dev, &dev_priv->ring[VCS]);
831 if (gt_iir & GEN6_BLITTER_USER_INTERRUPT)
832 notify_ring(dev, &dev_priv->ring[BCS]);
833
834 if (gt_iir & (GT_GEN6_BLT_CS_ERROR_INTERRUPT |
835 GT_GEN6_BSD_CS_ERROR_INTERRUPT |
836 GT_RENDER_CS_ERROR_INTERRUPT)) {
837 DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
838 i915_handle_error(dev, false);
839 }
840
841 if (gt_iir & GT_GEN7_L3_PARITY_ERROR_INTERRUPT)
842 ivybridge_handle_parity_error(dev);
843}
844
845static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
846 u32 pm_iir)
847{
848 unsigned long flags;
849
850 /*
851 * IIR bits should never already be set because IMR should
852 * prevent an interrupt from being shown in IIR. The warning
853 * displays a case where we've unsafely cleared
854 * dev_priv->rps.pm_iir. Although missing an interrupt of the same
855 * type is not a problem, it displays a problem in the logic.
856 *
857 * The mask bit in IMR is cleared by dev_priv->rps.work.
858 */
859
860 spin_lock_irqsave(&dev_priv->rps.lock, flags);
861 dev_priv->rps.pm_iir |= pm_iir;
862 I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
863 POSTING_READ(GEN6_PMIMR);
864 spin_unlock_irqrestore(&dev_priv->rps.lock, flags);
865
866 queue_work(dev_priv->wq, &dev_priv->rps.work);
867}
868
869#define HPD_STORM_DETECT_PERIOD 1000
870#define HPD_STORM_THRESHOLD 5
871
872static inline bool hotplug_irq_storm_detect(struct drm_device *dev,
873 u32 hotplug_trigger,
874 const u32 *hpd)
875{
876 drm_i915_private_t *dev_priv = dev->dev_private;
877 unsigned long irqflags;
878 int i;
879 bool ret = false;
880
881 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
882
883 for (i = 1; i < HPD_NUM_PINS; i++) {
884
885 if (!(hpd[i] & hotplug_trigger) ||
886 dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
887 continue;
888
889 dev_priv->hpd_event_bits |= (1 << i);
890 if (!time_in_range(jiffies, dev_priv->hpd_stats[i].hpd_last_jiffies,
891 dev_priv->hpd_stats[i].hpd_last_jiffies
892 + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) {
893 dev_priv->hpd_stats[i].hpd_last_jiffies = jiffies;
894 dev_priv->hpd_stats[i].hpd_cnt = 0;
895 } else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) {
896 dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
897 dev_priv->hpd_event_bits &= ~(1 << i);
898 DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
899 ret = true;
900 } else {
901 dev_priv->hpd_stats[i].hpd_cnt++;
902 }
903 }
904
905 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
906
907 return ret;
908}
909
910static void gmbus_irq_handler(struct drm_device *dev)
911{
912 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
913
914 wake_up_all(&dev_priv->gmbus_wait_queue);
915}
916
917static void dp_aux_irq_handler(struct drm_device *dev)
918{
919 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
920
921 wake_up_all(&dev_priv->gmbus_wait_queue);
922}
923
924static irqreturn_t valleyview_irq_handler(int irq, void *arg)
925{
926 struct drm_device *dev = (struct drm_device *) arg;
927 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
928 u32 iir, gt_iir, pm_iir;
929 irqreturn_t ret = IRQ_NONE;
930 unsigned long irqflags;
931 int pipe;
932 u32 pipe_stats[I915_MAX_PIPES];
933
934 atomic_inc(&dev_priv->irq_received);
935
936 while (true) {
937 iir = I915_READ(VLV_IIR);
938 gt_iir = I915_READ(GTIIR);
939 pm_iir = I915_READ(GEN6_PMIIR);
940
941 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
942 goto out;
943
944 ret = IRQ_HANDLED;
945
946 snb_gt_irq_handler(dev, dev_priv, gt_iir);
947
948 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
949 for_each_pipe(pipe) {
950 int reg = PIPESTAT(pipe);
951 pipe_stats[pipe] = I915_READ(reg);
952
953 /*
954 * Clear the PIPE*STAT regs before the IIR
955 */
956 if (pipe_stats[pipe] & 0x8000ffff) {
957 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
958 DRM_DEBUG_DRIVER("pipe %c underrun\n",
959 pipe_name(pipe));
960 I915_WRITE(reg, pipe_stats[pipe]);
961 }
962 }
963 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
964
965 for_each_pipe(pipe) {
966 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
967 drm_handle_vblank(dev, pipe);
968
969 if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
970 intel_prepare_page_flip(dev, pipe);
971 intel_finish_page_flip(dev, pipe);
972 }
973 }
974
975 /* Consume port. Then clear IIR or we'll miss events */
976 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
977 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
978 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
979
980 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
981 hotplug_status);
982 if (hotplug_trigger) {
983 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_status_i915))
984 i915_hpd_irq_setup(dev);
985 queue_work(dev_priv->wq,
986 &dev_priv->hotplug_work);
987 }
988 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
989 I915_READ(PORT_HOTPLUG_STAT);
990 }
991
992 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
993 gmbus_irq_handler(dev);
994
995 if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
996 gen6_queue_rps_work(dev_priv, pm_iir);
997
998 I915_WRITE(GTIIR, gt_iir);
999 I915_WRITE(GEN6_PMIIR, pm_iir);
1000 I915_WRITE(VLV_IIR, iir);
1001 }
1002
1003out:
1004 return ret;
1005}
1006
1007static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
1008{
1009 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1010 int pipe;
1011 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
1012
1013 if (hotplug_trigger) {
1014 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_ibx))
1015 ibx_hpd_irq_setup(dev);
1016 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
1017 }
1018 if (pch_iir & SDE_AUDIO_POWER_MASK) {
1019 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
1020 SDE_AUDIO_POWER_SHIFT);
1021 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
1022 port_name(port));
1023 }
1024
1025 if (pch_iir & SDE_AUX_MASK)
1026 dp_aux_irq_handler(dev);
1027
1028 if (pch_iir & SDE_GMBUS)
1029 gmbus_irq_handler(dev);
1030
1031 if (pch_iir & SDE_AUDIO_HDCP_MASK)
1032 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1033
1034 if (pch_iir & SDE_AUDIO_TRANS_MASK)
1035 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1036
1037 if (pch_iir & SDE_POISON)
1038 DRM_ERROR("PCH poison interrupt\n");
1039
1040 if (pch_iir & SDE_FDI_MASK)
1041 for_each_pipe(pipe)
1042 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1043 pipe_name(pipe),
1044 I915_READ(FDI_RX_IIR(pipe)));
1045
1046 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
1047 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1048
1049 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
1050 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
1051
1052 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
1053 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1054 false))
1055 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1056
1057 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
1058 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1059 false))
1060 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1061}
1062
1063static void ivb_err_int_handler(struct drm_device *dev)
1064{
1065 struct drm_i915_private *dev_priv = dev->dev_private;
1066 u32 err_int = I915_READ(GEN7_ERR_INT);
1067
1068 if (err_int & ERR_INT_POISON)
1069 DRM_ERROR("Poison interrupt\n");
1070
1071 if (err_int & ERR_INT_FIFO_UNDERRUN_A)
1072 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
1073 DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
1074
1075 if (err_int & ERR_INT_FIFO_UNDERRUN_B)
1076 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
1077 DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
1078
1079 if (err_int & ERR_INT_FIFO_UNDERRUN_C)
1080 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_C, false))
1081 DRM_DEBUG_DRIVER("Pipe C FIFO underrun\n");
1082
1083 I915_WRITE(GEN7_ERR_INT, err_int);
1084}
1085
1086static void cpt_serr_int_handler(struct drm_device *dev)
1087{
1088 struct drm_i915_private *dev_priv = dev->dev_private;
1089 u32 serr_int = I915_READ(SERR_INT);
1090
1091 if (serr_int & SERR_INT_POISON)
1092 DRM_ERROR("PCH poison interrupt\n");
1093
1094 if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
1095 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1096 false))
1097 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1098
1099 if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
1100 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1101 false))
1102 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1103
1104 if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
1105 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_C,
1106 false))
1107 DRM_DEBUG_DRIVER("PCH transcoder C FIFO underrun\n");
1108
1109 I915_WRITE(SERR_INT, serr_int);
1110}
1111
1112static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
1113{
1114 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1115 int pipe;
1116 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
1117
1118 if (hotplug_trigger) {
1119 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_cpt))
1120 ibx_hpd_irq_setup(dev);
1121 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
1122 }
1123 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
1124 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
1125 SDE_AUDIO_POWER_SHIFT_CPT);
1126 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
1127 port_name(port));
1128 }
1129
1130 if (pch_iir & SDE_AUX_MASK_CPT)
1131 dp_aux_irq_handler(dev);
1132
1133 if (pch_iir & SDE_GMBUS_CPT)
1134 gmbus_irq_handler(dev);
1135
1136 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
1137 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
1138
1139 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
1140 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
1141
1142 if (pch_iir & SDE_FDI_MASK_CPT)
1143 for_each_pipe(pipe)
1144 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1145 pipe_name(pipe),
1146 I915_READ(FDI_RX_IIR(pipe)));
1147
1148 if (pch_iir & SDE_ERROR_CPT)
1149 cpt_serr_int_handler(dev);
1150}
1151
1152static irqreturn_t ivybridge_irq_handler(int irq, void *arg)
1153{
1154 struct drm_device *dev = (struct drm_device *) arg;
1155 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1156 u32 de_iir, gt_iir, de_ier, pm_iir, sde_ier = 0;
1157 irqreturn_t ret = IRQ_NONE;
1158 int i;
1159
1160 atomic_inc(&dev_priv->irq_received);
1161
1162 /* We get interrupts on unclaimed registers, so check for this before we
1163 * do any I915_{READ,WRITE}. */
1164 if (IS_HASWELL(dev) &&
1165 (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
1166 DRM_ERROR("Unclaimed register before interrupt\n");
1167 I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
1168 }
1169
1170 /* disable master interrupt before clearing iir */
1171 de_ier = I915_READ(DEIER);
1172 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
1173
1174 /* Disable south interrupts. We'll only write to SDEIIR once, so further
1175 * interrupts will will be stored on its back queue, and then we'll be
1176 * able to process them after we restore SDEIER (as soon as we restore
1177 * it, we'll get an interrupt if SDEIIR still has something to process
1178 * due to its back queue). */
1179 if (!HAS_PCH_NOP(dev)) {
1180 sde_ier = I915_READ(SDEIER);
1181 I915_WRITE(SDEIER, 0);
1182 POSTING_READ(SDEIER);
1183 }
1184
1185 /* On Haswell, also mask ERR_INT because we don't want to risk
1186 * generating "unclaimed register" interrupts from inside the interrupt
1187 * handler. */
1188 if (IS_HASWELL(dev))
1189 ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
1190
1191 gt_iir = I915_READ(GTIIR);
1192 if (gt_iir) {
1193 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1194 I915_WRITE(GTIIR, gt_iir);
1195 ret = IRQ_HANDLED;
1196 }
1197
1198 de_iir = I915_READ(DEIIR);
1199 if (de_iir) {
1200 if (de_iir & DE_ERR_INT_IVB)
1201 ivb_err_int_handler(dev);
1202
1203 if (de_iir & DE_AUX_CHANNEL_A_IVB)
1204 dp_aux_irq_handler(dev);
1205
1206 if (de_iir & DE_GSE_IVB)
1207 intel_opregion_asle_intr(dev);
1208
1209 for (i = 0; i < 3; i++) {
1210 if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
1211 drm_handle_vblank(dev, i);
1212 if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
1213 intel_prepare_page_flip(dev, i);
1214 intel_finish_page_flip_plane(dev, i);
1215 }
1216 }
1217
1218 /* check event from PCH */
1219 if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
1220 u32 pch_iir = I915_READ(SDEIIR);
1221
1222 cpt_irq_handler(dev, pch_iir);
1223
1224 /* clear PCH hotplug event before clear CPU irq */
1225 I915_WRITE(SDEIIR, pch_iir);
1226 }
1227
1228 I915_WRITE(DEIIR, de_iir);
1229 ret = IRQ_HANDLED;
1230 }
1231
1232 pm_iir = I915_READ(GEN6_PMIIR);
1233 if (pm_iir) {
1234 if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
1235 gen6_queue_rps_work(dev_priv, pm_iir);
1236 I915_WRITE(GEN6_PMIIR, pm_iir);
1237 ret = IRQ_HANDLED;
1238 }
1239
1240 if (IS_HASWELL(dev) && ivb_can_enable_err_int(dev))
1241 ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
1242
1243 I915_WRITE(DEIER, de_ier);
1244 POSTING_READ(DEIER);
1245 if (!HAS_PCH_NOP(dev)) {
1246 I915_WRITE(SDEIER, sde_ier);
1247 POSTING_READ(SDEIER);
1248 }
1249
1250 return ret;
1251}
1252
1253static void ilk_gt_irq_handler(struct drm_device *dev,
1254 struct drm_i915_private *dev_priv,
1255 u32 gt_iir)
1256{
1257 if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY))
1258 notify_ring(dev, &dev_priv->ring[RCS]);
1259 if (gt_iir & GT_BSD_USER_INTERRUPT)
1260 notify_ring(dev, &dev_priv->ring[VCS]);
1261}
1262
1263static irqreturn_t ironlake_irq_handler(int irq, void *arg)
1264{
1265 struct drm_device *dev = (struct drm_device *) arg;
1266 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1267 int ret = IRQ_NONE;
1268 u32 de_iir, gt_iir, de_ier, pm_iir, sde_ier;
1269
1270 atomic_inc(&dev_priv->irq_received);
1271
1272 /* disable master interrupt before clearing iir */
1273 de_ier = I915_READ(DEIER);
1274 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
1275 POSTING_READ(DEIER);
1276
1277 /* Disable south interrupts. We'll only write to SDEIIR once, so further
1278 * interrupts will will be stored on its back queue, and then we'll be
1279 * able to process them after we restore SDEIER (as soon as we restore
1280 * it, we'll get an interrupt if SDEIIR still has something to process
1281 * due to its back queue). */
1282 sde_ier = I915_READ(SDEIER);
1283 I915_WRITE(SDEIER, 0);
1284 POSTING_READ(SDEIER);
1285
1286 de_iir = I915_READ(DEIIR);
1287 gt_iir = I915_READ(GTIIR);
1288 pm_iir = I915_READ(GEN6_PMIIR);
1289
1290 if (de_iir == 0 && gt_iir == 0 && (!IS_GEN6(dev) || pm_iir == 0))
1291 goto done;
1292
1293 ret = IRQ_HANDLED;
1294
1295 if (IS_GEN5(dev))
1296 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
1297 else
1298 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1299
1300 if (de_iir & DE_AUX_CHANNEL_A)
1301 dp_aux_irq_handler(dev);
1302
1303 if (de_iir & DE_GSE)
1304 intel_opregion_asle_intr(dev);
1305
1306 if (de_iir & DE_PIPEA_VBLANK)
1307 drm_handle_vblank(dev, 0);
1308
1309 if (de_iir & DE_PIPEB_VBLANK)
1310 drm_handle_vblank(dev, 1);
1311
1312 if (de_iir & DE_POISON)
1313 DRM_ERROR("Poison interrupt\n");
1314
1315 if (de_iir & DE_PIPEA_FIFO_UNDERRUN)
1316 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
1317 DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
1318
1319 if (de_iir & DE_PIPEB_FIFO_UNDERRUN)
1320 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
1321 DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
1322
1323 if (de_iir & DE_PLANEA_FLIP_DONE) {
1324 intel_prepare_page_flip(dev, 0);
1325 intel_finish_page_flip_plane(dev, 0);
1326 }
1327
1328 if (de_iir & DE_PLANEB_FLIP_DONE) {
1329 intel_prepare_page_flip(dev, 1);
1330 intel_finish_page_flip_plane(dev, 1);
1331 }
1332
1333 /* check event from PCH */
1334 if (de_iir & DE_PCH_EVENT) {
1335 u32 pch_iir = I915_READ(SDEIIR);
1336
1337 if (HAS_PCH_CPT(dev))
1338 cpt_irq_handler(dev, pch_iir);
1339 else
1340 ibx_irq_handler(dev, pch_iir);
1341
1342 /* should clear PCH hotplug event before clear CPU irq */
1343 I915_WRITE(SDEIIR, pch_iir);
1344 }
1345
1346 if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
1347 ironlake_handle_rps_change(dev);
1348
1349 if (IS_GEN6(dev) && pm_iir & GEN6_PM_DEFERRED_EVENTS)
1350 gen6_queue_rps_work(dev_priv, pm_iir);
1351
1352 I915_WRITE(GTIIR, gt_iir);
1353 I915_WRITE(DEIIR, de_iir);
1354 I915_WRITE(GEN6_PMIIR, pm_iir);
1355
1356done:
1357 I915_WRITE(DEIER, de_ier);
1358 POSTING_READ(DEIER);
1359 I915_WRITE(SDEIER, sde_ier);
1360 POSTING_READ(SDEIER);
1361
1362 return ret;
1363}
1364
1365/**
1366 * i915_error_work_func - do process context error handling work
1367 * @work: work struct
1368 *
1369 * Fire an error uevent so userspace can see that a hang or error
1370 * was detected.
1371 */
1372static void i915_error_work_func(struct work_struct *work)
1373{
1374 struct i915_gpu_error *error = container_of(work, struct i915_gpu_error,
1375 work);
1376 drm_i915_private_t *dev_priv = container_of(error, drm_i915_private_t,
1377 gpu_error);
1378 struct drm_device *dev = dev_priv->dev;
1379 struct intel_ring_buffer *ring;
1380 char *error_event[] = { "ERROR=1", NULL };
1381 char *reset_event[] = { "RESET=1", NULL };
1382 char *reset_done_event[] = { "ERROR=0", NULL };
1383 int i, ret;
1384
1385 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
1386
1387 /*
1388 * Note that there's only one work item which does gpu resets, so we
1389 * need not worry about concurrent gpu resets potentially incrementing
1390 * error->reset_counter twice. We only need to take care of another
1391 * racing irq/hangcheck declaring the gpu dead for a second time. A
1392 * quick check for that is good enough: schedule_work ensures the
1393 * correct ordering between hang detection and this work item, and since
1394 * the reset in-progress bit is only ever set by code outside of this
1395 * work we don't need to worry about any other races.
1396 */
1397 if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) {
1398 DRM_DEBUG_DRIVER("resetting chip\n");
1399 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE,
1400 reset_event);
1401
1402 ret = i915_reset(dev);
1403
1404 if (ret == 0) {
1405 /*
1406 * After all the gem state is reset, increment the reset
1407 * counter and wake up everyone waiting for the reset to
1408 * complete.
1409 *
1410 * Since unlock operations are a one-sided barrier only,
1411 * we need to insert a barrier here to order any seqno
1412 * updates before
1413 * the counter increment.
1414 */
1415 smp_mb__before_atomic_inc();
1416 atomic_inc(&dev_priv->gpu_error.reset_counter);
1417
1418 kobject_uevent_env(&dev->primary->kdev.kobj,
1419 KOBJ_CHANGE, reset_done_event);
1420 } else {
1421 atomic_set(&error->reset_counter, I915_WEDGED);
1422 }
1423
1424 for_each_ring(ring, dev_priv, i)
1425 wake_up_all(&ring->irq_queue);
1426
1427 intel_display_handle_reset(dev);
1428
1429 wake_up_all(&dev_priv->gpu_error.reset_queue);
1430 }
1431}
1432
1433/* NB: please notice the memset */
1434static void i915_get_extra_instdone(struct drm_device *dev,
1435 uint32_t *instdone)
1436{
1437 struct drm_i915_private *dev_priv = dev->dev_private;
1438 memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
1439
1440 switch(INTEL_INFO(dev)->gen) {
1441 case 2:
1442 case 3:
1443 instdone[0] = I915_READ(INSTDONE);
1444 break;
1445 case 4:
1446 case 5:
1447 case 6:
1448 instdone[0] = I915_READ(INSTDONE_I965);
1449 instdone[1] = I915_READ(INSTDONE1);
1450 break;
1451 default:
1452 WARN_ONCE(1, "Unsupported platform\n");
1453 case 7:
1454 instdone[0] = I915_READ(GEN7_INSTDONE_1);
1455 instdone[1] = I915_READ(GEN7_SC_INSTDONE);
1456 instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
1457 instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
1458 break;
1459 }
1460}
1461
1462#ifdef CONFIG_DEBUG_FS
1463static struct drm_i915_error_object *
1464i915_error_object_create_sized(struct drm_i915_private *dev_priv,
1465 struct drm_i915_gem_object *src,
1466 const int num_pages)
1467{
1468 struct drm_i915_error_object *dst;
1469 int i;
1470 u32 reloc_offset;
1471
1472 if (src == NULL || src->pages == NULL)
1473 return NULL;
1474
1475 dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
1476 if (dst == NULL)
1477 return NULL;
1478
1479 reloc_offset = src->gtt_offset;
1480 for (i = 0; i < num_pages; i++) {
1481 unsigned long flags;
1482 void *d;
1483
1484 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
1485 if (d == NULL)
1486 goto unwind;
1487
1488 local_irq_save(flags);
1489 if (reloc_offset < dev_priv->gtt.mappable_end &&
1490 src->has_global_gtt_mapping) {
1491 void __iomem *s;
1492
1493 /* Simply ignore tiling or any overlapping fence.
1494 * It's part of the error state, and this hopefully
1495 * captures what the GPU read.
1496 */
1497
1498 s = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
1499 reloc_offset);
1500 memcpy_fromio(d, s, PAGE_SIZE);
1501 io_mapping_unmap_atomic(s);
1502 } else if (src->stolen) {
1503 unsigned long offset;
1504
1505 offset = dev_priv->mm.stolen_base;
1506 offset += src->stolen->start;
1507 offset += i << PAGE_SHIFT;
1508
1509 memcpy_fromio(d, (void __iomem *) offset, PAGE_SIZE);
1510 } else {
1511 struct page *page;
1512 void *s;
1513
1514 page = i915_gem_object_get_page(src, i);
1515
1516 drm_clflush_pages(&page, 1);
1517
1518 s = kmap_atomic(page);
1519 memcpy(d, s, PAGE_SIZE);
1520 kunmap_atomic(s);
1521
1522 drm_clflush_pages(&page, 1);
1523 }
1524 local_irq_restore(flags);
1525
1526 dst->pages[i] = d;
1527
1528 reloc_offset += PAGE_SIZE;
1529 }
1530 dst->page_count = num_pages;
1531 dst->gtt_offset = src->gtt_offset;
1532
1533 return dst;
1534
1535unwind:
1536 while (i--)
1537 kfree(dst->pages[i]);
1538 kfree(dst);
1539 return NULL;
1540}
1541#define i915_error_object_create(dev_priv, src) \
1542 i915_error_object_create_sized((dev_priv), (src), \
1543 (src)->base.size>>PAGE_SHIFT)
1544
1545static void
1546i915_error_object_free(struct drm_i915_error_object *obj)
1547{
1548 int page;
1549
1550 if (obj == NULL)
1551 return;
1552
1553 for (page = 0; page < obj->page_count; page++)
1554 kfree(obj->pages[page]);
1555
1556 kfree(obj);
1557}
1558
1559void
1560i915_error_state_free(struct kref *error_ref)
1561{
1562 struct drm_i915_error_state *error = container_of(error_ref,
1563 typeof(*error), ref);
1564 int i;
1565
1566 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
1567 i915_error_object_free(error->ring[i].batchbuffer);
1568 i915_error_object_free(error->ring[i].ringbuffer);
1569 i915_error_object_free(error->ring[i].ctx);
1570 kfree(error->ring[i].requests);
1571 }
1572
1573 kfree(error->active_bo);
1574 kfree(error->overlay);
1575 kfree(error->display);
1576 kfree(error);
1577}
1578static void capture_bo(struct drm_i915_error_buffer *err,
1579 struct drm_i915_gem_object *obj)
1580{
1581 err->size = obj->base.size;
1582 err->name = obj->base.name;
1583 err->rseqno = obj->last_read_seqno;
1584 err->wseqno = obj->last_write_seqno;
1585 err->gtt_offset = obj->gtt_offset;
1586 err->read_domains = obj->base.read_domains;
1587 err->write_domain = obj->base.write_domain;
1588 err->fence_reg = obj->fence_reg;
1589 err->pinned = 0;
1590 if (obj->pin_count > 0)
1591 err->pinned = 1;
1592 if (obj->user_pin_count > 0)
1593 err->pinned = -1;
1594 err->tiling = obj->tiling_mode;
1595 err->dirty = obj->dirty;
1596 err->purgeable = obj->madv != I915_MADV_WILLNEED;
1597 err->ring = obj->ring ? obj->ring->id : -1;
1598 err->cache_level = obj->cache_level;
1599}
1600
1601static u32 capture_active_bo(struct drm_i915_error_buffer *err,
1602 int count, struct list_head *head)
1603{
1604 struct drm_i915_gem_object *obj;
1605 int i = 0;
1606
1607 list_for_each_entry(obj, head, mm_list) {
1608 capture_bo(err++, obj);
1609 if (++i == count)
1610 break;
1611 }
1612
1613 return i;
1614}
1615
1616static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
1617 int count, struct list_head *head)
1618{
1619 struct drm_i915_gem_object *obj;
1620 int i = 0;
1621
1622 list_for_each_entry(obj, head, gtt_list) {
1623 if (obj->pin_count == 0)
1624 continue;
1625
1626 capture_bo(err++, obj);
1627 if (++i == count)
1628 break;
1629 }
1630
1631 return i;
1632}
1633
1634static void i915_gem_record_fences(struct drm_device *dev,
1635 struct drm_i915_error_state *error)
1636{
1637 struct drm_i915_private *dev_priv = dev->dev_private;
1638 int i;
1639
1640 /* Fences */
1641 switch (INTEL_INFO(dev)->gen) {
1642 case 7:
1643 case 6:
1644 for (i = 0; i < dev_priv->num_fence_regs; i++)
1645 error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
1646 break;
1647 case 5:
1648 case 4:
1649 for (i = 0; i < 16; i++)
1650 error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
1651 break;
1652 case 3:
1653 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
1654 for (i = 0; i < 8; i++)
1655 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
1656 case 2:
1657 for (i = 0; i < 8; i++)
1658 error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
1659 break;
1660
1661 default:
1662 BUG();
1663 }
1664}
1665
1666static struct drm_i915_error_object *
1667i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
1668 struct intel_ring_buffer *ring)
1669{
1670 struct drm_i915_gem_object *obj;
1671 u32 seqno;
1672
1673 if (!ring->get_seqno)
1674 return NULL;
1675
1676 if (HAS_BROKEN_CS_TLB(dev_priv->dev)) {
1677 u32 acthd = I915_READ(ACTHD);
1678
1679 if (WARN_ON(ring->id != RCS))
1680 return NULL;
1681
1682 obj = ring->private;
1683 if (acthd >= obj->gtt_offset &&
1684 acthd < obj->gtt_offset + obj->base.size)
1685 return i915_error_object_create(dev_priv, obj);
1686 }
1687
1688 seqno = ring->get_seqno(ring, false);
1689 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
1690 if (obj->ring != ring)
1691 continue;
1692
1693 if (i915_seqno_passed(seqno, obj->last_read_seqno))
1694 continue;
1695
1696 if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
1697 continue;
1698
1699 /* We need to copy these to an anonymous buffer as the simplest
1700 * method to avoid being overwritten by userspace.
1701 */
1702 return i915_error_object_create(dev_priv, obj);
1703 }
1704
1705 return NULL;
1706}
1707
1708static void i915_record_ring_state(struct drm_device *dev,
1709 struct drm_i915_error_state *error,
1710 struct intel_ring_buffer *ring)
1711{
1712 struct drm_i915_private *dev_priv = dev->dev_private;
1713
1714 if (INTEL_INFO(dev)->gen >= 6) {
1715 error->rc_psmi[ring->id] = I915_READ(ring->mmio_base + 0x50);
1716 error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
1717 error->semaphore_mboxes[ring->id][0]
1718 = I915_READ(RING_SYNC_0(ring->mmio_base));
1719 error->semaphore_mboxes[ring->id][1]
1720 = I915_READ(RING_SYNC_1(ring->mmio_base));
1721 error->semaphore_seqno[ring->id][0] = ring->sync_seqno[0];
1722 error->semaphore_seqno[ring->id][1] = ring->sync_seqno[1];
1723 }
1724
1725 if (INTEL_INFO(dev)->gen >= 4) {
1726 error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
1727 error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
1728 error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
1729 error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
1730 error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
1731 if (ring->id == RCS)
1732 error->bbaddr = I915_READ64(BB_ADDR);
1733 } else {
1734 error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX);
1735 error->ipeir[ring->id] = I915_READ(IPEIR);
1736 error->ipehr[ring->id] = I915_READ(IPEHR);
1737 error->instdone[ring->id] = I915_READ(INSTDONE);
1738 }
1739
1740 error->waiting[ring->id] = waitqueue_active(&ring->irq_queue);
1741 error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
1742 error->seqno[ring->id] = ring->get_seqno(ring, false);
1743 error->acthd[ring->id] = intel_ring_get_active_head(ring);
1744 error->head[ring->id] = I915_READ_HEAD(ring);
1745 error->tail[ring->id] = I915_READ_TAIL(ring);
1746 error->ctl[ring->id] = I915_READ_CTL(ring);
1747
1748 error->cpu_ring_head[ring->id] = ring->head;
1749 error->cpu_ring_tail[ring->id] = ring->tail;
1750}
1751
1752
1753static void i915_gem_record_active_context(struct intel_ring_buffer *ring,
1754 struct drm_i915_error_state *error,
1755 struct drm_i915_error_ring *ering)
1756{
1757 struct drm_i915_private *dev_priv = ring->dev->dev_private;
1758 struct drm_i915_gem_object *obj;
1759
1760 /* Currently render ring is the only HW context user */
1761 if (ring->id != RCS || !error->ccid)
1762 return;
1763
1764 list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list) {
1765 if ((error->ccid & PAGE_MASK) == obj->gtt_offset) {
1766 ering->ctx = i915_error_object_create_sized(dev_priv,
1767 obj, 1);
1768 }
1769 }
1770}
1771
1772static void i915_gem_record_rings(struct drm_device *dev,
1773 struct drm_i915_error_state *error)
1774{
1775 struct drm_i915_private *dev_priv = dev->dev_private;
1776 struct intel_ring_buffer *ring;
1777 struct drm_i915_gem_request *request;
1778 int i, count;
1779
1780 for_each_ring(ring, dev_priv, i) {
1781 i915_record_ring_state(dev, error, ring);
1782
1783 error->ring[i].batchbuffer =
1784 i915_error_first_batchbuffer(dev_priv, ring);
1785
1786 error->ring[i].ringbuffer =
1787 i915_error_object_create(dev_priv, ring->obj);
1788
1789
1790 i915_gem_record_active_context(ring, error, &error->ring[i]);
1791
1792 count = 0;
1793 list_for_each_entry(request, &ring->request_list, list)
1794 count++;
1795
1796 error->ring[i].num_requests = count;
1797 error->ring[i].requests =
1798 kmalloc(count*sizeof(struct drm_i915_error_request),
1799 GFP_ATOMIC);
1800 if (error->ring[i].requests == NULL) {
1801 error->ring[i].num_requests = 0;
1802 continue;
1803 }
1804
1805 count = 0;
1806 list_for_each_entry(request, &ring->request_list, list) {
1807 struct drm_i915_error_request *erq;
1808
1809 erq = &error->ring[i].requests[count++];
1810 erq->seqno = request->seqno;
1811 erq->jiffies = request->emitted_jiffies;
1812 erq->tail = request->tail;
1813 }
1814 }
1815}
1816
1817/**
1818 * i915_capture_error_state - capture an error record for later analysis
1819 * @dev: drm device
1820 *
1821 * Should be called when an error is detected (either a hang or an error
1822 * interrupt) to capture error state from the time of the error. Fills
1823 * out a structure which becomes available in debugfs for user level tools
1824 * to pick up.
1825 */
1826static void i915_capture_error_state(struct drm_device *dev)
1827{
1828 struct drm_i915_private *dev_priv = dev->dev_private;
1829 struct drm_i915_gem_object *obj;
1830 struct drm_i915_error_state *error;
1831 unsigned long flags;
1832 int i, pipe;
1833
1834 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1835 error = dev_priv->gpu_error.first_error;
1836 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1837 if (error)
1838 return;
1839
1840 /* Account for pipe specific data like PIPE*STAT */
1841 error = kzalloc(sizeof(*error), GFP_ATOMIC);
1842 if (!error) {
1843 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
1844 return;
1845 }
1846
1847 DRM_INFO("capturing error event; look for more information in "
1848 "/sys/kernel/debug/dri/%d/i915_error_state\n",
1849 dev->primary->index);
1850
1851 kref_init(&error->ref);
1852 error->eir = I915_READ(EIR);
1853 error->pgtbl_er = I915_READ(PGTBL_ER);
1854 if (HAS_HW_CONTEXTS(dev))
1855 error->ccid = I915_READ(CCID);
1856
1857 if (HAS_PCH_SPLIT(dev))
1858 error->ier = I915_READ(DEIER) | I915_READ(GTIER);
1859 else if (IS_VALLEYVIEW(dev))
1860 error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
1861 else if (IS_GEN2(dev))
1862 error->ier = I915_READ16(IER);
1863 else
1864 error->ier = I915_READ(IER);
1865
1866 if (INTEL_INFO(dev)->gen >= 6)
1867 error->derrmr = I915_READ(DERRMR);
1868
1869 if (IS_VALLEYVIEW(dev))
1870 error->forcewake = I915_READ(FORCEWAKE_VLV);
1871 else if (INTEL_INFO(dev)->gen >= 7)
1872 error->forcewake = I915_READ(FORCEWAKE_MT);
1873 else if (INTEL_INFO(dev)->gen == 6)
1874 error->forcewake = I915_READ(FORCEWAKE);
1875
1876 if (!HAS_PCH_SPLIT(dev))
1877 for_each_pipe(pipe)
1878 error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
1879
1880 if (INTEL_INFO(dev)->gen >= 6) {
1881 error->error = I915_READ(ERROR_GEN6);
1882 error->done_reg = I915_READ(DONE_REG);
1883 }
1884
1885 if (INTEL_INFO(dev)->gen == 7)
1886 error->err_int = I915_READ(GEN7_ERR_INT);
1887
1888 i915_get_extra_instdone(dev, error->extra_instdone);
1889
1890 i915_gem_record_fences(dev, error);
1891 i915_gem_record_rings(dev, error);
1892
1893 /* Record buffers on the active and pinned lists. */
1894 error->active_bo = NULL;
1895 error->pinned_bo = NULL;
1896
1897 i = 0;
1898 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
1899 i++;
1900 error->active_bo_count = i;
1901 list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list)
1902 if (obj->pin_count)
1903 i++;
1904 error->pinned_bo_count = i - error->active_bo_count;
1905
1906 error->active_bo = NULL;
1907 error->pinned_bo = NULL;
1908 if (i) {
1909 error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
1910 GFP_ATOMIC);
1911 if (error->active_bo)
1912 error->pinned_bo =
1913 error->active_bo + error->active_bo_count;
1914 }
1915
1916 if (error->active_bo)
1917 error->active_bo_count =
1918 capture_active_bo(error->active_bo,
1919 error->active_bo_count,
1920 &dev_priv->mm.active_list);
1921
1922 if (error->pinned_bo)
1923 error->pinned_bo_count =
1924 capture_pinned_bo(error->pinned_bo,
1925 error->pinned_bo_count,
1926 &dev_priv->mm.bound_list);
1927
1928 do_gettimeofday(&error->time);
1929
1930 error->overlay = intel_overlay_capture_error_state(dev);
1931 error->display = intel_display_capture_error_state(dev);
1932
1933 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1934 if (dev_priv->gpu_error.first_error == NULL) {
1935 dev_priv->gpu_error.first_error = error;
1936 error = NULL;
1937 }
1938 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1939
1940 if (error)
1941 i915_error_state_free(&error->ref);
1942}
1943
1944void i915_destroy_error_state(struct drm_device *dev)
1945{
1946 struct drm_i915_private *dev_priv = dev->dev_private;
1947 struct drm_i915_error_state *error;
1948 unsigned long flags;
1949
1950 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1951 error = dev_priv->gpu_error.first_error;
1952 dev_priv->gpu_error.first_error = NULL;
1953 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1954
1955 if (error)
1956 kref_put(&error->ref, i915_error_state_free);
1957}
1958#else
1959#define i915_capture_error_state(x)
1960#endif
1961
1962static void i915_report_and_clear_eir(struct drm_device *dev)
1963{
1964 struct drm_i915_private *dev_priv = dev->dev_private;
1965 uint32_t instdone[I915_NUM_INSTDONE_REG];
1966 u32 eir = I915_READ(EIR);
1967 int pipe, i;
1968
1969 if (!eir)
1970 return;
1971
1972 pr_err("render error detected, EIR: 0x%08x\n", eir);
1973
1974 i915_get_extra_instdone(dev, instdone);
1975
1976 if (IS_G4X(dev)) {
1977 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
1978 u32 ipeir = I915_READ(IPEIR_I965);
1979
1980 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
1981 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
1982 for (i = 0; i < ARRAY_SIZE(instdone); i++)
1983 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
1984 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
1985 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
1986 I915_WRITE(IPEIR_I965, ipeir);
1987 POSTING_READ(IPEIR_I965);
1988 }
1989 if (eir & GM45_ERROR_PAGE_TABLE) {
1990 u32 pgtbl_err = I915_READ(PGTBL_ER);
1991 pr_err("page table error\n");
1992 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
1993 I915_WRITE(PGTBL_ER, pgtbl_err);
1994 POSTING_READ(PGTBL_ER);
1995 }
1996 }
1997
1998 if (!IS_GEN2(dev)) {
1999 if (eir & I915_ERROR_PAGE_TABLE) {
2000 u32 pgtbl_err = I915_READ(PGTBL_ER);
2001 pr_err("page table error\n");
2002 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2003 I915_WRITE(PGTBL_ER, pgtbl_err);
2004 POSTING_READ(PGTBL_ER);
2005 }
2006 }
2007
2008 if (eir & I915_ERROR_MEMORY_REFRESH) {
2009 pr_err("memory refresh error:\n");
2010 for_each_pipe(pipe)
2011 pr_err("pipe %c stat: 0x%08x\n",
2012 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
2013 /* pipestat has already been acked */
2014 }
2015 if (eir & I915_ERROR_INSTRUCTION) {
2016 pr_err("instruction error\n");
2017 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
2018 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2019 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2020 if (INTEL_INFO(dev)->gen < 4) {
2021 u32 ipeir = I915_READ(IPEIR);
2022
2023 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
2024 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
2025 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
2026 I915_WRITE(IPEIR, ipeir);
2027 POSTING_READ(IPEIR);
2028 } else {
2029 u32 ipeir = I915_READ(IPEIR_I965);
2030
2031 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2032 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2033 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2034 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2035 I915_WRITE(IPEIR_I965, ipeir);
2036 POSTING_READ(IPEIR_I965);
2037 }
2038 }
2039
2040 I915_WRITE(EIR, eir);
2041 POSTING_READ(EIR);
2042 eir = I915_READ(EIR);
2043 if (eir) {
2044 /*
2045 * some errors might have become stuck,
2046 * mask them.
2047 */
2048 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
2049 I915_WRITE(EMR, I915_READ(EMR) | eir);
2050 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2051 }
2052}
2053
2054/**
2055 * i915_handle_error - handle an error interrupt
2056 * @dev: drm device
2057 *
2058 * Do some basic checking of regsiter state at error interrupt time and
2059 * dump it to the syslog. Also call i915_capture_error_state() to make
2060 * sure we get a record and make it available in debugfs. Fire a uevent
2061 * so userspace knows something bad happened (should trigger collection
2062 * of a ring dump etc.).
2063 */
2064void i915_handle_error(struct drm_device *dev, bool wedged)
2065{
2066 struct drm_i915_private *dev_priv = dev->dev_private;
2067 struct intel_ring_buffer *ring;
2068 int i;
2069
2070 i915_capture_error_state(dev);
2071 i915_report_and_clear_eir(dev);
2072
2073 if (wedged) {
2074 atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG,
2075 &dev_priv->gpu_error.reset_counter);
2076
2077 /*
2078 * Wakeup waiting processes so that the reset work item
2079 * doesn't deadlock trying to grab various locks.
2080 */
2081 for_each_ring(ring, dev_priv, i)
2082 wake_up_all(&ring->irq_queue);
2083 }
2084
2085 queue_work(dev_priv->wq, &dev_priv->gpu_error.work);
2086}
2087
2088static void __always_unused i915_pageflip_stall_check(struct drm_device *dev, int pipe)
2089{
2090 drm_i915_private_t *dev_priv = dev->dev_private;
2091 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
2092 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2093 struct drm_i915_gem_object *obj;
2094 struct intel_unpin_work *work;
2095 unsigned long flags;
2096 bool stall_detected;
2097
2098 /* Ignore early vblank irqs */
2099 if (intel_crtc == NULL)
2100 return;
2101
2102 spin_lock_irqsave(&dev->event_lock, flags);
2103 work = intel_crtc->unpin_work;
2104
2105 if (work == NULL ||
2106 atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE ||
2107 !work->enable_stall_check) {
2108 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
2109 spin_unlock_irqrestore(&dev->event_lock, flags);
2110 return;
2111 }
2112
2113 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
2114 obj = work->pending_flip_obj;
2115 if (INTEL_INFO(dev)->gen >= 4) {
2116 int dspsurf = DSPSURF(intel_crtc->plane);
2117 stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
2118 obj->gtt_offset;
2119 } else {
2120 int dspaddr = DSPADDR(intel_crtc->plane);
2121 stall_detected = I915_READ(dspaddr) == (obj->gtt_offset +
2122 crtc->y * crtc->fb->pitches[0] +
2123 crtc->x * crtc->fb->bits_per_pixel/8);
2124 }
2125
2126 spin_unlock_irqrestore(&dev->event_lock, flags);
2127
2128 if (stall_detected) {
2129 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
2130 intel_prepare_page_flip(dev, intel_crtc->plane);
2131 }
2132}
2133
2134/* Called from drm generic code, passed 'crtc' which
2135 * we use as a pipe index
2136 */
2137static int i915_enable_vblank(struct drm_device *dev, int pipe)
2138{
2139 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2140 unsigned long irqflags;
2141
2142 if (!i915_pipe_enabled(dev, pipe))
2143 return -EINVAL;
2144
2145 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2146 if (INTEL_INFO(dev)->gen >= 4)
2147 i915_enable_pipestat(dev_priv, pipe,
2148 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2149 else
2150 i915_enable_pipestat(dev_priv, pipe,
2151 PIPE_VBLANK_INTERRUPT_ENABLE);
2152
2153 /* maintain vblank delivery even in deep C-states */
2154 if (dev_priv->info->gen == 3)
2155 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
2156 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2157
2158 return 0;
2159}
2160
2161static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
2162{
2163 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2164 unsigned long irqflags;
2165
2166 if (!i915_pipe_enabled(dev, pipe))
2167 return -EINVAL;
2168
2169 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2170 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
2171 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
2172 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2173
2174 return 0;
2175}
2176
2177static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
2178{
2179 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2180 unsigned long irqflags;
2181
2182 if (!i915_pipe_enabled(dev, pipe))
2183 return -EINVAL;
2184
2185 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2186 ironlake_enable_display_irq(dev_priv,
2187 DE_PIPEA_VBLANK_IVB << (5 * pipe));
2188 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2189
2190 return 0;
2191}
2192
2193static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
2194{
2195 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2196 unsigned long irqflags;
2197 u32 imr;
2198
2199 if (!i915_pipe_enabled(dev, pipe))
2200 return -EINVAL;
2201
2202 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2203 imr = I915_READ(VLV_IMR);
2204 if (pipe == 0)
2205 imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
2206 else
2207 imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2208 I915_WRITE(VLV_IMR, imr);
2209 i915_enable_pipestat(dev_priv, pipe,
2210 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2211 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2212
2213 return 0;
2214}
2215
2216/* Called from drm generic code, passed 'crtc' which
2217 * we use as a pipe index
2218 */
2219static void i915_disable_vblank(struct drm_device *dev, int pipe)
2220{
2221 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2222 unsigned long irqflags;
2223
2224 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2225 if (dev_priv->info->gen == 3)
2226 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
2227
2228 i915_disable_pipestat(dev_priv, pipe,
2229 PIPE_VBLANK_INTERRUPT_ENABLE |
2230 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2231 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2232}
2233
2234static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
2235{
2236 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2237 unsigned long irqflags;
2238
2239 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2240 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
2241 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
2242 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2243}
2244
2245static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
2246{
2247 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2248 unsigned long irqflags;
2249
2250 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2251 ironlake_disable_display_irq(dev_priv,
2252 DE_PIPEA_VBLANK_IVB << (pipe * 5));
2253 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2254}
2255
2256static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
2257{
2258 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2259 unsigned long irqflags;
2260 u32 imr;
2261
2262 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2263 i915_disable_pipestat(dev_priv, pipe,
2264 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2265 imr = I915_READ(VLV_IMR);
2266 if (pipe == 0)
2267 imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
2268 else
2269 imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2270 I915_WRITE(VLV_IMR, imr);
2271 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2272}
2273
2274static u32
2275ring_last_seqno(struct intel_ring_buffer *ring)
2276{
2277 return list_entry(ring->request_list.prev,
2278 struct drm_i915_gem_request, list)->seqno;
2279}
2280
2281static bool i915_hangcheck_ring_idle(struct intel_ring_buffer *ring,
2282 u32 ring_seqno, bool *err)
2283{
2284 if (list_empty(&ring->request_list) ||
2285 i915_seqno_passed(ring_seqno, ring_last_seqno(ring))) {
2286 /* Issue a wake-up to catch stuck h/w. */
2287 if (waitqueue_active(&ring->irq_queue)) {
2288 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
2289 ring->name);
2290 wake_up_all(&ring->irq_queue);
2291 *err = true;
2292 }
2293 return true;
2294 }
2295 return false;
2296}
2297
2298static bool semaphore_passed(struct intel_ring_buffer *ring)
2299{
2300 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2301 u32 acthd = intel_ring_get_active_head(ring) & HEAD_ADDR;
2302 struct intel_ring_buffer *signaller;
2303 u32 cmd, ipehr, acthd_min;
2304
2305 ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
2306 if ((ipehr & ~(0x3 << 16)) !=
2307 (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE | MI_SEMAPHORE_REGISTER))
2308 return false;
2309
2310 /* ACTHD is likely pointing to the dword after the actual command,
2311 * so scan backwards until we find the MBOX.
2312 */
2313 acthd_min = max((int)acthd - 3 * 4, 0);
2314 do {
2315 cmd = ioread32(ring->virtual_start + acthd);
2316 if (cmd == ipehr)
2317 break;
2318
2319 acthd -= 4;
2320 if (acthd < acthd_min)
2321 return false;
2322 } while (1);
2323
2324 signaller = &dev_priv->ring[(ring->id + (((ipehr >> 17) & 1) + 1)) % 3];
2325 return i915_seqno_passed(signaller->get_seqno(signaller, false),
2326 ioread32(ring->virtual_start+acthd+4)+1);
2327}
2328
2329static bool kick_ring(struct intel_ring_buffer *ring)
2330{
2331 struct drm_device *dev = ring->dev;
2332 struct drm_i915_private *dev_priv = dev->dev_private;
2333 u32 tmp = I915_READ_CTL(ring);
2334 if (tmp & RING_WAIT) {
2335 DRM_ERROR("Kicking stuck wait on %s\n",
2336 ring->name);
2337 I915_WRITE_CTL(ring, tmp);
2338 return true;
2339 }
2340
2341 if (INTEL_INFO(dev)->gen >= 6 &&
2342 tmp & RING_WAIT_SEMAPHORE &&
2343 semaphore_passed(ring)) {
2344 DRM_ERROR("Kicking stuck semaphore on %s\n",
2345 ring->name);
2346 I915_WRITE_CTL(ring, tmp);
2347 return true;
2348 }
2349 return false;
2350}
2351
2352static bool i915_hangcheck_ring_hung(struct intel_ring_buffer *ring)
2353{
2354 if (IS_GEN2(ring->dev))
2355 return false;
2356
2357 /* Is the chip hanging on a WAIT_FOR_EVENT?
2358 * If so we can simply poke the RB_WAIT bit
2359 * and break the hang. This should work on
2360 * all but the second generation chipsets.
2361 */
2362 return !kick_ring(ring);
2363}
2364
2365static bool i915_hangcheck_hung(struct drm_device *dev)
2366{
2367 drm_i915_private_t *dev_priv = dev->dev_private;
2368
2369 if (dev_priv->gpu_error.hangcheck_count++ > 1) {
2370 bool hung = true;
2371 struct intel_ring_buffer *ring;
2372 int i;
2373
2374 DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
2375 i915_handle_error(dev, true);
2376
2377 for_each_ring(ring, dev_priv, i)
2378 hung &= i915_hangcheck_ring_hung(ring);
2379
2380 return hung;
2381 }
2382
2383 return false;
2384}
2385
2386/**
2387 * This is called when the chip hasn't reported back with completed
2388 * batchbuffers in a long time. The first time this is called we simply record
2389 * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses
2390 * again, we assume the chip is wedged and try to fix it.
2391 */
2392void i915_hangcheck_elapsed(unsigned long data)
2393{
2394 struct drm_device *dev = (struct drm_device *)data;
2395 drm_i915_private_t *dev_priv = dev->dev_private;
2396 struct intel_ring_buffer *ring;
2397 bool err = false, idle;
2398 int i;
2399 u32 seqno[I915_NUM_RINGS];
2400 bool work_done;
2401
2402 if (!i915_enable_hangcheck)
2403 return;
2404
2405 idle = true;
2406 for_each_ring(ring, dev_priv, i) {
2407 seqno[i] = ring->get_seqno(ring, false);
2408 idle &= i915_hangcheck_ring_idle(ring, seqno[i], &err);
2409 }
2410
2411 /* If all work is done then ACTHD clearly hasn't advanced. */
2412 if (idle) {
2413 if (err) {
2414 if (i915_hangcheck_hung(dev))
2415 return;
2416
2417 goto repeat;
2418 }
2419
2420 dev_priv->gpu_error.hangcheck_count = 0;
2421 return;
2422 }
2423
2424 work_done = false;
2425 for_each_ring(ring, dev_priv, i) {
2426 if (ring->hangcheck.seqno != seqno[i]) {
2427 work_done = true;
2428 ring->hangcheck.seqno = seqno[i];
2429 }
2430 }
2431
2432 if (!work_done) {
2433 if (i915_hangcheck_hung(dev))
2434 return;
2435 } else {
2436 dev_priv->gpu_error.hangcheck_count = 0;
2437 }
2438
2439repeat:
2440 /* Reset timer case chip hangs without another request being added */
2441 mod_timer(&dev_priv->gpu_error.hangcheck_timer,
2442 round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
2443}
2444
2445/* drm_dma.h hooks
2446*/
2447static void ironlake_irq_preinstall(struct drm_device *dev)
2448{
2449 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2450
2451 atomic_set(&dev_priv->irq_received, 0);
2452
2453 I915_WRITE(HWSTAM, 0xeffe);
2454
2455 /* XXX hotplug from PCH */
2456
2457 I915_WRITE(DEIMR, 0xffffffff);
2458 I915_WRITE(DEIER, 0x0);
2459 POSTING_READ(DEIER);
2460
2461 /* and GT */
2462 I915_WRITE(GTIMR, 0xffffffff);
2463 I915_WRITE(GTIER, 0x0);
2464 POSTING_READ(GTIER);
2465
2466 if (HAS_PCH_NOP(dev))
2467 return;
2468
2469 /* south display irq */
2470 I915_WRITE(SDEIMR, 0xffffffff);
2471 /*
2472 * SDEIER is also touched by the interrupt handler to work around missed
2473 * PCH interrupts. Hence we can't update it after the interrupt handler
2474 * is enabled - instead we unconditionally enable all PCH interrupt
2475 * sources here, but then only unmask them as needed with SDEIMR.
2476 */
2477 I915_WRITE(SDEIER, 0xffffffff);
2478 POSTING_READ(SDEIER);
2479}
2480
2481static void valleyview_irq_preinstall(struct drm_device *dev)
2482{
2483 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2484 int pipe;
2485
2486 atomic_set(&dev_priv->irq_received, 0);
2487
2488 /* VLV magic */
2489 I915_WRITE(VLV_IMR, 0);
2490 I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
2491 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
2492 I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
2493
2494 /* and GT */
2495 I915_WRITE(GTIIR, I915_READ(GTIIR));
2496 I915_WRITE(GTIIR, I915_READ(GTIIR));
2497 I915_WRITE(GTIMR, 0xffffffff);
2498 I915_WRITE(GTIER, 0x0);
2499 POSTING_READ(GTIER);
2500
2501 I915_WRITE(DPINVGTT, 0xff);
2502
2503 I915_WRITE(PORT_HOTPLUG_EN, 0);
2504 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2505 for_each_pipe(pipe)
2506 I915_WRITE(PIPESTAT(pipe), 0xffff);
2507 I915_WRITE(VLV_IIR, 0xffffffff);
2508 I915_WRITE(VLV_IMR, 0xffffffff);
2509 I915_WRITE(VLV_IER, 0x0);
2510 POSTING_READ(VLV_IER);
2511}
2512
2513static void ibx_hpd_irq_setup(struct drm_device *dev)
2514{
2515 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2516 struct drm_mode_config *mode_config = &dev->mode_config;
2517 struct intel_encoder *intel_encoder;
2518 u32 mask = ~I915_READ(SDEIMR);
2519 u32 hotplug;
2520
2521 if (HAS_PCH_IBX(dev)) {
2522 mask &= ~SDE_HOTPLUG_MASK;
2523 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
2524 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
2525 mask |= hpd_ibx[intel_encoder->hpd_pin];
2526 } else {
2527 mask &= ~SDE_HOTPLUG_MASK_CPT;
2528 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
2529 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
2530 mask |= hpd_cpt[intel_encoder->hpd_pin];
2531 }
2532
2533 I915_WRITE(SDEIMR, ~mask);
2534
2535 /*
2536 * Enable digital hotplug on the PCH, and configure the DP short pulse
2537 * duration to 2ms (which is the minimum in the Display Port spec)
2538 *
2539 * This register is the same on all known PCH chips.
2540 */
2541 hotplug = I915_READ(PCH_PORT_HOTPLUG);
2542 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
2543 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
2544 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
2545 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
2546 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
2547}
2548
2549static void ibx_irq_postinstall(struct drm_device *dev)
2550{
2551 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2552 u32 mask;
2553
2554 if (HAS_PCH_IBX(dev)) {
2555 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_TRANSB_FIFO_UNDER |
2556 SDE_TRANSA_FIFO_UNDER | SDE_POISON;
2557 } else {
2558 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT | SDE_ERROR_CPT;
2559
2560 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
2561 }
2562
2563 if (HAS_PCH_NOP(dev))
2564 return;
2565
2566 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2567 I915_WRITE(SDEIMR, ~mask);
2568}
2569
2570static int ironlake_irq_postinstall(struct drm_device *dev)
2571{
2572 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2573 /* enable kind of interrupts always enabled */
2574 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
2575 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
2576 DE_AUX_CHANNEL_A | DE_PIPEB_FIFO_UNDERRUN |
2577 DE_PIPEA_FIFO_UNDERRUN | DE_POISON;
2578 u32 render_irqs;
2579
2580 dev_priv->irq_mask = ~display_mask;
2581
2582 /* should always can generate irq */
2583 I915_WRITE(DEIIR, I915_READ(DEIIR));
2584 I915_WRITE(DEIMR, dev_priv->irq_mask);
2585 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK);
2586 POSTING_READ(DEIER);
2587
2588 dev_priv->gt_irq_mask = ~0;
2589
2590 I915_WRITE(GTIIR, I915_READ(GTIIR));
2591 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
2592
2593 if (IS_GEN6(dev))
2594 render_irqs =
2595 GT_USER_INTERRUPT |
2596 GEN6_BSD_USER_INTERRUPT |
2597 GEN6_BLITTER_USER_INTERRUPT;
2598 else
2599 render_irqs =
2600 GT_USER_INTERRUPT |
2601 GT_PIPE_NOTIFY |
2602 GT_BSD_USER_INTERRUPT;
2603 I915_WRITE(GTIER, render_irqs);
2604 POSTING_READ(GTIER);
2605
2606 ibx_irq_postinstall(dev);
2607
2608 if (IS_IRONLAKE_M(dev)) {
2609 /* Clear & enable PCU event interrupts */
2610 I915_WRITE(DEIIR, DE_PCU_EVENT);
2611 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
2612 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
2613 }
2614
2615 return 0;
2616}
2617
2618static int ivybridge_irq_postinstall(struct drm_device *dev)
2619{
2620 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2621 /* enable kind of interrupts always enabled */
2622 u32 display_mask =
2623 DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | DE_PCH_EVENT_IVB |
2624 DE_PLANEC_FLIP_DONE_IVB |
2625 DE_PLANEB_FLIP_DONE_IVB |
2626 DE_PLANEA_FLIP_DONE_IVB |
2627 DE_AUX_CHANNEL_A_IVB |
2628 DE_ERR_INT_IVB;
2629 u32 render_irqs;
2630
2631 dev_priv->irq_mask = ~display_mask;
2632
2633 /* should always can generate irq */
2634 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
2635 I915_WRITE(DEIIR, I915_READ(DEIIR));
2636 I915_WRITE(DEIMR, dev_priv->irq_mask);
2637 I915_WRITE(DEIER,
2638 display_mask |
2639 DE_PIPEC_VBLANK_IVB |
2640 DE_PIPEB_VBLANK_IVB |
2641 DE_PIPEA_VBLANK_IVB);
2642 POSTING_READ(DEIER);
2643
2644 dev_priv->gt_irq_mask = ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
2645
2646 I915_WRITE(GTIIR, I915_READ(GTIIR));
2647 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
2648
2649 render_irqs = GT_USER_INTERRUPT | GEN6_BSD_USER_INTERRUPT |
2650 GEN6_BLITTER_USER_INTERRUPT | GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
2651 I915_WRITE(GTIER, render_irqs);
2652 POSTING_READ(GTIER);
2653
2654 ibx_irq_postinstall(dev);
2655
2656 return 0;
2657}
2658
2659static int valleyview_irq_postinstall(struct drm_device *dev)
2660{
2661 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2662 u32 enable_mask;
2663 u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV;
2664 u32 render_irqs;
2665
2666 enable_mask = I915_DISPLAY_PORT_INTERRUPT;
2667 enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2668 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2669 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2670 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2671
2672 /*
2673 *Leave vblank interrupts masked initially. enable/disable will
2674 * toggle them based on usage.
2675 */
2676 dev_priv->irq_mask = (~enable_mask) |
2677 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2678 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2679
2680 I915_WRITE(PORT_HOTPLUG_EN, 0);
2681 POSTING_READ(PORT_HOTPLUG_EN);
2682
2683 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
2684 I915_WRITE(VLV_IER, enable_mask);
2685 I915_WRITE(VLV_IIR, 0xffffffff);
2686 I915_WRITE(PIPESTAT(0), 0xffff);
2687 I915_WRITE(PIPESTAT(1), 0xffff);
2688 POSTING_READ(VLV_IER);
2689
2690 i915_enable_pipestat(dev_priv, 0, pipestat_enable);
2691 i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
2692 i915_enable_pipestat(dev_priv, 1, pipestat_enable);
2693
2694 I915_WRITE(VLV_IIR, 0xffffffff);
2695 I915_WRITE(VLV_IIR, 0xffffffff);
2696
2697 I915_WRITE(GTIIR, I915_READ(GTIIR));
2698 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
2699
2700 render_irqs = GT_USER_INTERRUPT | GEN6_BSD_USER_INTERRUPT |
2701 GEN6_BLITTER_USER_INTERRUPT;
2702 I915_WRITE(GTIER, render_irqs);
2703 POSTING_READ(GTIER);
2704
2705 /* ack & enable invalid PTE error interrupts */
2706#if 0 /* FIXME: add support to irq handler for checking these bits */
2707 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
2708 I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
2709#endif
2710
2711 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
2712
2713 return 0;
2714}
2715
2716static void valleyview_irq_uninstall(struct drm_device *dev)
2717{
2718 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2719 int pipe;
2720
2721 if (!dev_priv)
2722 return;
2723
2724 del_timer_sync(&dev_priv->hotplug_reenable_timer);
2725
2726 for_each_pipe(pipe)
2727 I915_WRITE(PIPESTAT(pipe), 0xffff);
2728
2729 I915_WRITE(HWSTAM, 0xffffffff);
2730 I915_WRITE(PORT_HOTPLUG_EN, 0);
2731 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2732 for_each_pipe(pipe)
2733 I915_WRITE(PIPESTAT(pipe), 0xffff);
2734 I915_WRITE(VLV_IIR, 0xffffffff);
2735 I915_WRITE(VLV_IMR, 0xffffffff);
2736 I915_WRITE(VLV_IER, 0x0);
2737 POSTING_READ(VLV_IER);
2738}
2739
2740static void ironlake_irq_uninstall(struct drm_device *dev)
2741{
2742 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2743
2744 if (!dev_priv)
2745 return;
2746
2747 del_timer_sync(&dev_priv->hotplug_reenable_timer);
2748
2749 I915_WRITE(HWSTAM, 0xffffffff);
2750
2751 I915_WRITE(DEIMR, 0xffffffff);
2752 I915_WRITE(DEIER, 0x0);
2753 I915_WRITE(DEIIR, I915_READ(DEIIR));
2754 if (IS_GEN7(dev))
2755 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
2756
2757 I915_WRITE(GTIMR, 0xffffffff);
2758 I915_WRITE(GTIER, 0x0);
2759 I915_WRITE(GTIIR, I915_READ(GTIIR));
2760
2761 if (HAS_PCH_NOP(dev))
2762 return;
2763
2764 I915_WRITE(SDEIMR, 0xffffffff);
2765 I915_WRITE(SDEIER, 0x0);
2766 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2767 if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev))
2768 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
2769}
2770
2771static void i8xx_irq_preinstall(struct drm_device * dev)
2772{
2773 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2774 int pipe;
2775
2776 atomic_set(&dev_priv->irq_received, 0);
2777
2778 for_each_pipe(pipe)
2779 I915_WRITE(PIPESTAT(pipe), 0);
2780 I915_WRITE16(IMR, 0xffff);
2781 I915_WRITE16(IER, 0x0);
2782 POSTING_READ16(IER);
2783}
2784
2785static int i8xx_irq_postinstall(struct drm_device *dev)
2786{
2787 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2788
2789 I915_WRITE16(EMR,
2790 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2791
2792 /* Unmask the interrupts that we always want on. */
2793 dev_priv->irq_mask =
2794 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2795 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2796 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2797 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2798 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2799 I915_WRITE16(IMR, dev_priv->irq_mask);
2800
2801 I915_WRITE16(IER,
2802 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2803 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2804 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2805 I915_USER_INTERRUPT);
2806 POSTING_READ16(IER);
2807
2808 return 0;
2809}
2810
2811/*
2812 * Returns true when a page flip has completed.
2813 */
2814static bool i8xx_handle_vblank(struct drm_device *dev,
2815 int pipe, u16 iir)
2816{
2817 drm_i915_private_t *dev_priv = dev->dev_private;
2818 u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(pipe);
2819
2820 if (!drm_handle_vblank(dev, pipe))
2821 return false;
2822
2823 if ((iir & flip_pending) == 0)
2824 return false;
2825
2826 intel_prepare_page_flip(dev, pipe);
2827
2828 /* We detect FlipDone by looking for the change in PendingFlip from '1'
2829 * to '0' on the following vblank, i.e. IIR has the Pendingflip
2830 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
2831 * the flip is completed (no longer pending). Since this doesn't raise
2832 * an interrupt per se, we watch for the change at vblank.
2833 */
2834 if (I915_READ16(ISR) & flip_pending)
2835 return false;
2836
2837 intel_finish_page_flip(dev, pipe);
2838
2839 return true;
2840}
2841
2842static irqreturn_t i8xx_irq_handler(int irq, void *arg)
2843{
2844 struct drm_device *dev = (struct drm_device *) arg;
2845 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2846 u16 iir, new_iir;
2847 u32 pipe_stats[2];
2848 unsigned long irqflags;
2849 int irq_received;
2850 int pipe;
2851 u16 flip_mask =
2852 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2853 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2854
2855 atomic_inc(&dev_priv->irq_received);
2856
2857 iir = I915_READ16(IIR);
2858 if (iir == 0)
2859 return IRQ_NONE;
2860
2861 while (iir & ~flip_mask) {
2862 /* Can't rely on pipestat interrupt bit in iir as it might
2863 * have been cleared after the pipestat interrupt was received.
2864 * It doesn't set the bit in iir again, but it still produces
2865 * interrupts (for non-MSI).
2866 */
2867 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2868 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2869 i915_handle_error(dev, false);
2870
2871 for_each_pipe(pipe) {
2872 int reg = PIPESTAT(pipe);
2873 pipe_stats[pipe] = I915_READ(reg);
2874
2875 /*
2876 * Clear the PIPE*STAT regs before the IIR
2877 */
2878 if (pipe_stats[pipe] & 0x8000ffff) {
2879 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2880 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2881 pipe_name(pipe));
2882 I915_WRITE(reg, pipe_stats[pipe]);
2883 irq_received = 1;
2884 }
2885 }
2886 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2887
2888 I915_WRITE16(IIR, iir & ~flip_mask);
2889 new_iir = I915_READ16(IIR); /* Flush posted writes */
2890
2891 i915_update_dri1_breadcrumb(dev);
2892
2893 if (iir & I915_USER_INTERRUPT)
2894 notify_ring(dev, &dev_priv->ring[RCS]);
2895
2896 if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
2897 i8xx_handle_vblank(dev, 0, iir))
2898 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(0);
2899
2900 if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
2901 i8xx_handle_vblank(dev, 1, iir))
2902 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(1);
2903
2904 iir = new_iir;
2905 }
2906
2907 return IRQ_HANDLED;
2908}
2909
2910static void i8xx_irq_uninstall(struct drm_device * dev)
2911{
2912 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2913 int pipe;
2914
2915 for_each_pipe(pipe) {
2916 /* Clear enable bits; then clear status bits */
2917 I915_WRITE(PIPESTAT(pipe), 0);
2918 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
2919 }
2920 I915_WRITE16(IMR, 0xffff);
2921 I915_WRITE16(IER, 0x0);
2922 I915_WRITE16(IIR, I915_READ16(IIR));
2923}
2924
2925static void i915_irq_preinstall(struct drm_device * dev)
2926{
2927 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2928 int pipe;
2929
2930 atomic_set(&dev_priv->irq_received, 0);
2931
2932 if (I915_HAS_HOTPLUG(dev)) {
2933 I915_WRITE(PORT_HOTPLUG_EN, 0);
2934 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2935 }
2936
2937 I915_WRITE16(HWSTAM, 0xeffe);
2938 for_each_pipe(pipe)
2939 I915_WRITE(PIPESTAT(pipe), 0);
2940 I915_WRITE(IMR, 0xffffffff);
2941 I915_WRITE(IER, 0x0);
2942 POSTING_READ(IER);
2943}
2944
2945static int i915_irq_postinstall(struct drm_device *dev)
2946{
2947 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2948 u32 enable_mask;
2949
2950 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2951
2952 /* Unmask the interrupts that we always want on. */
2953 dev_priv->irq_mask =
2954 ~(I915_ASLE_INTERRUPT |
2955 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2956 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2957 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2958 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2959 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2960
2961 enable_mask =
2962 I915_ASLE_INTERRUPT |
2963 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2964 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2965 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2966 I915_USER_INTERRUPT;
2967
2968 if (I915_HAS_HOTPLUG(dev)) {
2969 I915_WRITE(PORT_HOTPLUG_EN, 0);
2970 POSTING_READ(PORT_HOTPLUG_EN);
2971
2972 /* Enable in IER... */
2973 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
2974 /* and unmask in IMR */
2975 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
2976 }
2977
2978 I915_WRITE(IMR, dev_priv->irq_mask);
2979 I915_WRITE(IER, enable_mask);
2980 POSTING_READ(IER);
2981
2982 i915_enable_asle_pipestat(dev);
2983
2984 return 0;
2985}
2986
2987/*
2988 * Returns true when a page flip has completed.
2989 */
2990static bool i915_handle_vblank(struct drm_device *dev,
2991 int plane, int pipe, u32 iir)
2992{
2993 drm_i915_private_t *dev_priv = dev->dev_private;
2994 u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
2995
2996 if (!drm_handle_vblank(dev, pipe))
2997 return false;
2998
2999 if ((iir & flip_pending) == 0)
3000 return false;
3001
3002 intel_prepare_page_flip(dev, plane);
3003
3004 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3005 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3006 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3007 * the flip is completed (no longer pending). Since this doesn't raise
3008 * an interrupt per se, we watch for the change at vblank.
3009 */
3010 if (I915_READ(ISR) & flip_pending)
3011 return false;
3012
3013 intel_finish_page_flip(dev, pipe);
3014
3015 return true;
3016}
3017
3018static irqreturn_t i915_irq_handler(int irq, void *arg)
3019{
3020 struct drm_device *dev = (struct drm_device *) arg;
3021 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3022 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
3023 unsigned long irqflags;
3024 u32 flip_mask =
3025 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3026 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3027 int pipe, ret = IRQ_NONE;
3028
3029 atomic_inc(&dev_priv->irq_received);
3030
3031 iir = I915_READ(IIR);
3032 do {
3033 bool irq_received = (iir & ~flip_mask) != 0;
3034 bool blc_event = false;
3035
3036 /* Can't rely on pipestat interrupt bit in iir as it might
3037 * have been cleared after the pipestat interrupt was received.
3038 * It doesn't set the bit in iir again, but it still produces
3039 * interrupts (for non-MSI).
3040 */
3041 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3042 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3043 i915_handle_error(dev, false);
3044
3045 for_each_pipe(pipe) {
3046 int reg = PIPESTAT(pipe);
3047 pipe_stats[pipe] = I915_READ(reg);
3048
3049 /* Clear the PIPE*STAT regs before the IIR */
3050 if (pipe_stats[pipe] & 0x8000ffff) {
3051 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3052 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3053 pipe_name(pipe));
3054 I915_WRITE(reg, pipe_stats[pipe]);
3055 irq_received = true;
3056 }
3057 }
3058 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3059
3060 if (!irq_received)
3061 break;
3062
3063 /* Consume port. Then clear IIR or we'll miss events */
3064 if ((I915_HAS_HOTPLUG(dev)) &&
3065 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
3066 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3067 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
3068
3069 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
3070 hotplug_status);
3071 if (hotplug_trigger) {
3072 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_status_i915))
3073 i915_hpd_irq_setup(dev);
3074 queue_work(dev_priv->wq,
3075 &dev_priv->hotplug_work);
3076 }
3077 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
3078 POSTING_READ(PORT_HOTPLUG_STAT);
3079 }
3080
3081 I915_WRITE(IIR, iir & ~flip_mask);
3082 new_iir = I915_READ(IIR); /* Flush posted writes */
3083
3084 if (iir & I915_USER_INTERRUPT)
3085 notify_ring(dev, &dev_priv->ring[RCS]);
3086
3087 for_each_pipe(pipe) {
3088 int plane = pipe;
3089 if (IS_MOBILE(dev))
3090 plane = !plane;
3091
3092 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
3093 i915_handle_vblank(dev, plane, pipe, iir))
3094 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
3095
3096 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
3097 blc_event = true;
3098 }
3099
3100 if (blc_event || (iir & I915_ASLE_INTERRUPT))
3101 intel_opregion_asle_intr(dev);
3102
3103 /* With MSI, interrupts are only generated when iir
3104 * transitions from zero to nonzero. If another bit got
3105 * set while we were handling the existing iir bits, then
3106 * we would never get another interrupt.
3107 *
3108 * This is fine on non-MSI as well, as if we hit this path
3109 * we avoid exiting the interrupt handler only to generate
3110 * another one.
3111 *
3112 * Note that for MSI this could cause a stray interrupt report
3113 * if an interrupt landed in the time between writing IIR and
3114 * the posting read. This should be rare enough to never
3115 * trigger the 99% of 100,000 interrupts test for disabling
3116 * stray interrupts.
3117 */
3118 ret = IRQ_HANDLED;
3119 iir = new_iir;
3120 } while (iir & ~flip_mask);
3121
3122 i915_update_dri1_breadcrumb(dev);
3123
3124 return ret;
3125}
3126
3127static void i915_irq_uninstall(struct drm_device * dev)
3128{
3129 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3130 int pipe;
3131
3132 del_timer_sync(&dev_priv->hotplug_reenable_timer);
3133
3134 if (I915_HAS_HOTPLUG(dev)) {
3135 I915_WRITE(PORT_HOTPLUG_EN, 0);
3136 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3137 }
3138
3139 I915_WRITE16(HWSTAM, 0xffff);
3140 for_each_pipe(pipe) {
3141 /* Clear enable bits; then clear status bits */
3142 I915_WRITE(PIPESTAT(pipe), 0);
3143 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
3144 }
3145 I915_WRITE(IMR, 0xffffffff);
3146 I915_WRITE(IER, 0x0);
3147
3148 I915_WRITE(IIR, I915_READ(IIR));
3149}
3150
3151static void i965_irq_preinstall(struct drm_device * dev)
3152{
3153 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3154 int pipe;
3155
3156 atomic_set(&dev_priv->irq_received, 0);
3157
3158 I915_WRITE(PORT_HOTPLUG_EN, 0);
3159 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3160
3161 I915_WRITE(HWSTAM, 0xeffe);
3162 for_each_pipe(pipe)
3163 I915_WRITE(PIPESTAT(pipe), 0);
3164 I915_WRITE(IMR, 0xffffffff);
3165 I915_WRITE(IER, 0x0);
3166 POSTING_READ(IER);
3167}
3168
3169static int i965_irq_postinstall(struct drm_device *dev)
3170{
3171 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3172 u32 enable_mask;
3173 u32 error_mask;
3174
3175 /* Unmask the interrupts that we always want on. */
3176 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
3177 I915_DISPLAY_PORT_INTERRUPT |
3178 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3179 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3180 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3181 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3182 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3183
3184 enable_mask = ~dev_priv->irq_mask;
3185 enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3186 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
3187 enable_mask |= I915_USER_INTERRUPT;
3188
3189 if (IS_G4X(dev))
3190 enable_mask |= I915_BSD_USER_INTERRUPT;
3191
3192 i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
3193
3194 /*
3195 * Enable some error detection, note the instruction error mask
3196 * bit is reserved, so we leave it masked.
3197 */
3198 if (IS_G4X(dev)) {
3199 error_mask = ~(GM45_ERROR_PAGE_TABLE |
3200 GM45_ERROR_MEM_PRIV |
3201 GM45_ERROR_CP_PRIV |
3202 I915_ERROR_MEMORY_REFRESH);
3203 } else {
3204 error_mask = ~(I915_ERROR_PAGE_TABLE |
3205 I915_ERROR_MEMORY_REFRESH);
3206 }
3207 I915_WRITE(EMR, error_mask);
3208
3209 I915_WRITE(IMR, dev_priv->irq_mask);
3210 I915_WRITE(IER, enable_mask);
3211 POSTING_READ(IER);
3212
3213 I915_WRITE(PORT_HOTPLUG_EN, 0);
3214 POSTING_READ(PORT_HOTPLUG_EN);
3215
3216 i915_enable_asle_pipestat(dev);
3217
3218 return 0;
3219}
3220
3221static void i915_hpd_irq_setup(struct drm_device *dev)
3222{
3223 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3224 struct drm_mode_config *mode_config = &dev->mode_config;
3225 struct intel_encoder *intel_encoder;
3226 u32 hotplug_en;
3227
3228 if (I915_HAS_HOTPLUG(dev)) {
3229 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
3230 hotplug_en &= ~HOTPLUG_INT_EN_MASK;
3231 /* Note HDMI and DP share hotplug bits */
3232 /* enable bits are the same for all generations */
3233 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
3234 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
3235 hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin];
3236 /* Programming the CRT detection parameters tends
3237 to generate a spurious hotplug event about three
3238 seconds later. So just do it once.
3239 */
3240 if (IS_G4X(dev))
3241 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
3242 hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK;
3243 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
3244
3245 /* Ignore TV since it's buggy */
3246 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
3247 }
3248}
3249
3250static irqreturn_t i965_irq_handler(int irq, void *arg)
3251{
3252 struct drm_device *dev = (struct drm_device *) arg;
3253 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3254 u32 iir, new_iir;
3255 u32 pipe_stats[I915_MAX_PIPES];
3256 unsigned long irqflags;
3257 int irq_received;
3258 int ret = IRQ_NONE, pipe;
3259 u32 flip_mask =
3260 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3261 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3262
3263 atomic_inc(&dev_priv->irq_received);
3264
3265 iir = I915_READ(IIR);
3266
3267 for (;;) {
3268 bool blc_event = false;
3269
3270 irq_received = (iir & ~flip_mask) != 0;
3271
3272 /* Can't rely on pipestat interrupt bit in iir as it might
3273 * have been cleared after the pipestat interrupt was received.
3274 * It doesn't set the bit in iir again, but it still produces
3275 * interrupts (for non-MSI).
3276 */
3277 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3278 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3279 i915_handle_error(dev, false);
3280
3281 for_each_pipe(pipe) {
3282 int reg = PIPESTAT(pipe);
3283 pipe_stats[pipe] = I915_READ(reg);
3284
3285 /*
3286 * Clear the PIPE*STAT regs before the IIR
3287 */
3288 if (pipe_stats[pipe] & 0x8000ffff) {
3289 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3290 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3291 pipe_name(pipe));
3292 I915_WRITE(reg, pipe_stats[pipe]);
3293 irq_received = 1;
3294 }
3295 }
3296 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3297
3298 if (!irq_received)
3299 break;
3300
3301 ret = IRQ_HANDLED;
3302
3303 /* Consume port. Then clear IIR or we'll miss events */
3304 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
3305 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3306 u32 hotplug_trigger = hotplug_status & (IS_G4X(dev) ?
3307 HOTPLUG_INT_STATUS_G4X :
3308 HOTPLUG_INT_STATUS_I965);
3309
3310 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
3311 hotplug_status);
3312 if (hotplug_trigger) {
3313 if (hotplug_irq_storm_detect(dev, hotplug_trigger,
3314 IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i965))
3315 i915_hpd_irq_setup(dev);
3316 queue_work(dev_priv->wq,
3317 &dev_priv->hotplug_work);
3318 }
3319 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
3320 I915_READ(PORT_HOTPLUG_STAT);
3321 }
3322
3323 I915_WRITE(IIR, iir & ~flip_mask);
3324 new_iir = I915_READ(IIR); /* Flush posted writes */
3325
3326 if (iir & I915_USER_INTERRUPT)
3327 notify_ring(dev, &dev_priv->ring[RCS]);
3328 if (iir & I915_BSD_USER_INTERRUPT)
3329 notify_ring(dev, &dev_priv->ring[VCS]);
3330
3331 for_each_pipe(pipe) {
3332 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
3333 i915_handle_vblank(dev, pipe, pipe, iir))
3334 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
3335
3336 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
3337 blc_event = true;
3338 }
3339
3340
3341 if (blc_event || (iir & I915_ASLE_INTERRUPT))
3342 intel_opregion_asle_intr(dev);
3343
3344 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
3345 gmbus_irq_handler(dev);
3346
3347 /* With MSI, interrupts are only generated when iir
3348 * transitions from zero to nonzero. If another bit got
3349 * set while we were handling the existing iir bits, then
3350 * we would never get another interrupt.
3351 *
3352 * This is fine on non-MSI as well, as if we hit this path
3353 * we avoid exiting the interrupt handler only to generate
3354 * another one.
3355 *
3356 * Note that for MSI this could cause a stray interrupt report
3357 * if an interrupt landed in the time between writing IIR and
3358 * the posting read. This should be rare enough to never
3359 * trigger the 99% of 100,000 interrupts test for disabling
3360 * stray interrupts.
3361 */
3362 iir = new_iir;
3363 }
3364
3365 i915_update_dri1_breadcrumb(dev);
3366
3367 return ret;
3368}
3369
3370static void i965_irq_uninstall(struct drm_device * dev)
3371{
3372 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3373 int pipe;
3374
3375 if (!dev_priv)
3376 return;
3377
3378 del_timer_sync(&dev_priv->hotplug_reenable_timer);
3379
3380 I915_WRITE(PORT_HOTPLUG_EN, 0);
3381 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3382
3383 I915_WRITE(HWSTAM, 0xffffffff);
3384 for_each_pipe(pipe)
3385 I915_WRITE(PIPESTAT(pipe), 0);
3386 I915_WRITE(IMR, 0xffffffff);
3387 I915_WRITE(IER, 0x0);
3388
3389 for_each_pipe(pipe)
3390 I915_WRITE(PIPESTAT(pipe),
3391 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
3392 I915_WRITE(IIR, I915_READ(IIR));
3393}
3394
3395static void i915_reenable_hotplug_timer_func(unsigned long data)
3396{
3397 drm_i915_private_t *dev_priv = (drm_i915_private_t *)data;
3398 struct drm_device *dev = dev_priv->dev;
3399 struct drm_mode_config *mode_config = &dev->mode_config;
3400 unsigned long irqflags;
3401 int i;
3402
3403 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3404 for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) {
3405 struct drm_connector *connector;
3406
3407 if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED)
3408 continue;
3409
3410 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
3411
3412 list_for_each_entry(connector, &mode_config->connector_list, head) {
3413 struct intel_connector *intel_connector = to_intel_connector(connector);
3414
3415 if (intel_connector->encoder->hpd_pin == i) {
3416 if (connector->polled != intel_connector->polled)
3417 DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
3418 drm_get_connector_name(connector));
3419 connector->polled = intel_connector->polled;
3420 if (!connector->polled)
3421 connector->polled = DRM_CONNECTOR_POLL_HPD;
3422 }
3423 }
3424 }
3425 if (dev_priv->display.hpd_irq_setup)
3426 dev_priv->display.hpd_irq_setup(dev);
3427 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3428}
3429
3430void intel_irq_init(struct drm_device *dev)
3431{
3432 struct drm_i915_private *dev_priv = dev->dev_private;
3433
3434 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
3435 INIT_WORK(&dev_priv->gpu_error.work, i915_error_work_func);
3436 INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
3437 INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
3438
3439 setup_timer(&dev_priv->gpu_error.hangcheck_timer,
3440 i915_hangcheck_elapsed,
3441 (unsigned long) dev);
3442 setup_timer(&dev_priv->hotplug_reenable_timer, i915_reenable_hotplug_timer_func,
3443 (unsigned long) dev_priv);
3444
3445 pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
3446
3447 dev->driver->get_vblank_counter = i915_get_vblank_counter;
3448 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
3449 if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
3450 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
3451 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
3452 }
3453
3454 if (drm_core_check_feature(dev, DRIVER_MODESET))
3455 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
3456 else
3457 dev->driver->get_vblank_timestamp = NULL;
3458 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
3459
3460 if (IS_VALLEYVIEW(dev)) {
3461 dev->driver->irq_handler = valleyview_irq_handler;
3462 dev->driver->irq_preinstall = valleyview_irq_preinstall;
3463 dev->driver->irq_postinstall = valleyview_irq_postinstall;
3464 dev->driver->irq_uninstall = valleyview_irq_uninstall;
3465 dev->driver->enable_vblank = valleyview_enable_vblank;
3466 dev->driver->disable_vblank = valleyview_disable_vblank;
3467 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3468 } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
3469 /* Share pre & uninstall handlers with ILK/SNB */
3470 dev->driver->irq_handler = ivybridge_irq_handler;
3471 dev->driver->irq_preinstall = ironlake_irq_preinstall;
3472 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
3473 dev->driver->irq_uninstall = ironlake_irq_uninstall;
3474 dev->driver->enable_vblank = ivybridge_enable_vblank;
3475 dev->driver->disable_vblank = ivybridge_disable_vblank;
3476 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
3477 } else if (HAS_PCH_SPLIT(dev)) {
3478 dev->driver->irq_handler = ironlake_irq_handler;
3479 dev->driver->irq_preinstall = ironlake_irq_preinstall;
3480 dev->driver->irq_postinstall = ironlake_irq_postinstall;
3481 dev->driver->irq_uninstall = ironlake_irq_uninstall;
3482 dev->driver->enable_vblank = ironlake_enable_vblank;
3483 dev->driver->disable_vblank = ironlake_disable_vblank;
3484 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
3485 } else {
3486 if (INTEL_INFO(dev)->gen == 2) {
3487 dev->driver->irq_preinstall = i8xx_irq_preinstall;
3488 dev->driver->irq_postinstall = i8xx_irq_postinstall;
3489 dev->driver->irq_handler = i8xx_irq_handler;
3490 dev->driver->irq_uninstall = i8xx_irq_uninstall;
3491 } else if (INTEL_INFO(dev)->gen == 3) {
3492 dev->driver->irq_preinstall = i915_irq_preinstall;
3493 dev->driver->irq_postinstall = i915_irq_postinstall;
3494 dev->driver->irq_uninstall = i915_irq_uninstall;
3495 dev->driver->irq_handler = i915_irq_handler;
3496 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3497 } else {
3498 dev->driver->irq_preinstall = i965_irq_preinstall;
3499 dev->driver->irq_postinstall = i965_irq_postinstall;
3500 dev->driver->irq_uninstall = i965_irq_uninstall;
3501 dev->driver->irq_handler = i965_irq_handler;
3502 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3503 }
3504 dev->driver->enable_vblank = i915_enable_vblank;
3505 dev->driver->disable_vblank = i915_disable_vblank;
3506 }
3507}
3508
3509void intel_hpd_init(struct drm_device *dev)
3510{
3511 struct drm_i915_private *dev_priv = dev->dev_private;
3512 struct drm_mode_config *mode_config = &dev->mode_config;
3513 struct drm_connector *connector;
3514 int i;
3515
3516 for (i = 1; i < HPD_NUM_PINS; i++) {
3517 dev_priv->hpd_stats[i].hpd_cnt = 0;
3518 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
3519 }
3520 list_for_each_entry(connector, &mode_config->connector_list, head) {
3521 struct intel_connector *intel_connector = to_intel_connector(connector);
3522 connector->polled = intel_connector->polled;
3523 if (!connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE)
3524 connector->polled = DRM_CONNECTOR_POLL_HPD;
3525 }
3526 if (dev_priv->display.hpd_irq_setup)
3527 dev_priv->display.hpd_irq_setup(dev);
3528}
Linux kernel - Deliverables
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