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drm/i915: Don't wait for Punit after each freq change on VLV
[mirror_ubuntu-artful-kernel.git] / drivers / gpu / drm / i915 / i915_irq.c
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
39 static 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
47 static 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
55 static 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
64 static 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
73 static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */
74 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
75 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
76 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
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
82 static void ibx_hpd_irq_setup(struct drm_device *dev);
83 static void i915_hpd_irq_setup(struct drm_device *dev);
84
85 /* For display hotplug interrupt */
86 static void
87 ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
88 {
89 if ((dev_priv->irq_mask & mask) != 0) {
90 dev_priv->irq_mask &= ~mask;
91 I915_WRITE(DEIMR, dev_priv->irq_mask);
92 POSTING_READ(DEIMR);
93 }
94 }
95
96 static void
97 ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
98 {
99 if ((dev_priv->irq_mask & mask) != mask) {
100 dev_priv->irq_mask |= mask;
101 I915_WRITE(DEIMR, dev_priv->irq_mask);
102 POSTING_READ(DEIMR);
103 }
104 }
105
106 static bool ivb_can_enable_err_int(struct drm_device *dev)
107 {
108 struct drm_i915_private *dev_priv = dev->dev_private;
109 struct intel_crtc *crtc;
110 enum pipe pipe;
111
112 for_each_pipe(pipe) {
113 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
114
115 if (crtc->cpu_fifo_underrun_disabled)
116 return false;
117 }
118
119 return true;
120 }
121
122 static bool cpt_can_enable_serr_int(struct drm_device *dev)
123 {
124 struct drm_i915_private *dev_priv = dev->dev_private;
125 enum pipe pipe;
126 struct intel_crtc *crtc;
127
128 for_each_pipe(pipe) {
129 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
130
131 if (crtc->pch_fifo_underrun_disabled)
132 return false;
133 }
134
135 return true;
136 }
137
138 static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev,
139 enum pipe pipe, bool enable)
140 {
141 struct drm_i915_private *dev_priv = dev->dev_private;
142 uint32_t bit = (pipe == PIPE_A) ? DE_PIPEA_FIFO_UNDERRUN :
143 DE_PIPEB_FIFO_UNDERRUN;
144
145 if (enable)
146 ironlake_enable_display_irq(dev_priv, bit);
147 else
148 ironlake_disable_display_irq(dev_priv, bit);
149 }
150
151 static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev,
152 bool enable)
153 {
154 struct drm_i915_private *dev_priv = dev->dev_private;
155
156 if (enable) {
157 if (!ivb_can_enable_err_int(dev))
158 return;
159
160 I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN_A |
161 ERR_INT_FIFO_UNDERRUN_B |
162 ERR_INT_FIFO_UNDERRUN_C);
163
164 ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
165 } else {
166 ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
167 }
168 }
169
170 static void ibx_set_fifo_underrun_reporting(struct intel_crtc *crtc,
171 bool enable)
172 {
173 struct drm_device *dev = crtc->base.dev;
174 struct drm_i915_private *dev_priv = dev->dev_private;
175 uint32_t bit = (crtc->pipe == PIPE_A) ? SDE_TRANSA_FIFO_UNDER :
176 SDE_TRANSB_FIFO_UNDER;
177
178 if (enable)
179 I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~bit);
180 else
181 I915_WRITE(SDEIMR, I915_READ(SDEIMR) | bit);
182
183 POSTING_READ(SDEIMR);
184 }
185
186 static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
187 enum transcoder pch_transcoder,
188 bool enable)
189 {
190 struct drm_i915_private *dev_priv = dev->dev_private;
191
192 if (enable) {
193 if (!cpt_can_enable_serr_int(dev))
194 return;
195
196 I915_WRITE(SERR_INT, SERR_INT_TRANS_A_FIFO_UNDERRUN |
197 SERR_INT_TRANS_B_FIFO_UNDERRUN |
198 SERR_INT_TRANS_C_FIFO_UNDERRUN);
199
200 I915_WRITE(SDEIMR, I915_READ(SDEIMR) & ~SDE_ERROR_CPT);
201 } else {
202 I915_WRITE(SDEIMR, I915_READ(SDEIMR) | SDE_ERROR_CPT);
203 }
204
205 POSTING_READ(SDEIMR);
206 }
207
208 /**
209 * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
210 * @dev: drm device
211 * @pipe: pipe
212 * @enable: true if we want to report FIFO underrun errors, false otherwise
213 *
214 * This function makes us disable or enable CPU fifo underruns for a specific
215 * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
216 * reporting for one pipe may also disable all the other CPU error interruts for
217 * the other pipes, due to the fact that there's just one interrupt mask/enable
218 * bit for all the pipes.
219 *
220 * Returns the previous state of underrun reporting.
221 */
222 bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
223 enum pipe pipe, bool enable)
224 {
225 struct drm_i915_private *dev_priv = dev->dev_private;
226 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
227 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
228 unsigned long flags;
229 bool ret;
230
231 spin_lock_irqsave(&dev_priv->irq_lock, flags);
232
233 ret = !intel_crtc->cpu_fifo_underrun_disabled;
234
235 if (enable == ret)
236 goto done;
237
238 intel_crtc->cpu_fifo_underrun_disabled = !enable;
239
240 if (IS_GEN5(dev) || IS_GEN6(dev))
241 ironlake_set_fifo_underrun_reporting(dev, pipe, enable);
242 else if (IS_GEN7(dev))
243 ivybridge_set_fifo_underrun_reporting(dev, enable);
244
245 done:
246 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
247 return ret;
248 }
249
250 /**
251 * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
252 * @dev: drm device
253 * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
254 * @enable: true if we want to report FIFO underrun errors, false otherwise
255 *
256 * This function makes us disable or enable PCH fifo underruns for a specific
257 * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
258 * underrun reporting for one transcoder may also disable all the other PCH
259 * error interruts for the other transcoders, due to the fact that there's just
260 * one interrupt mask/enable bit for all the transcoders.
261 *
262 * Returns the previous state of underrun reporting.
263 */
264 bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
265 enum transcoder pch_transcoder,
266 bool enable)
267 {
268 struct drm_i915_private *dev_priv = dev->dev_private;
269 enum pipe p;
270 struct drm_crtc *crtc;
271 struct intel_crtc *intel_crtc;
272 unsigned long flags;
273 bool ret;
274
275 if (HAS_PCH_LPT(dev)) {
276 crtc = NULL;
277 for_each_pipe(p) {
278 struct drm_crtc *c = dev_priv->pipe_to_crtc_mapping[p];
279 if (intel_pipe_has_type(c, INTEL_OUTPUT_ANALOG)) {
280 crtc = c;
281 break;
282 }
283 }
284 if (!crtc) {
285 DRM_ERROR("PCH FIFO underrun, but no CRTC using the PCH found\n");
286 return false;
287 }
288 } else {
289 crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder];
290 }
291 intel_crtc = to_intel_crtc(crtc);
292
293 spin_lock_irqsave(&dev_priv->irq_lock, flags);
294
295 ret = !intel_crtc->pch_fifo_underrun_disabled;
296
297 if (enable == ret)
298 goto done;
299
300 intel_crtc->pch_fifo_underrun_disabled = !enable;
301
302 if (HAS_PCH_IBX(dev))
303 ibx_set_fifo_underrun_reporting(intel_crtc, enable);
304 else
305 cpt_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
306
307 done:
308 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
309 return ret;
310 }
311
312
313 void
314 i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
315 {
316 u32 reg = PIPESTAT(pipe);
317 u32 pipestat = I915_READ(reg) & 0x7fff0000;
318
319 if ((pipestat & mask) == mask)
320 return;
321
322 /* Enable the interrupt, clear any pending status */
323 pipestat |= mask | (mask >> 16);
324 I915_WRITE(reg, pipestat);
325 POSTING_READ(reg);
326 }
327
328 void
329 i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
330 {
331 u32 reg = PIPESTAT(pipe);
332 u32 pipestat = I915_READ(reg) & 0x7fff0000;
333
334 if ((pipestat & mask) == 0)
335 return;
336
337 pipestat &= ~mask;
338 I915_WRITE(reg, pipestat);
339 POSTING_READ(reg);
340 }
341
342 /**
343 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
344 */
345 static void i915_enable_asle_pipestat(struct drm_device *dev)
346 {
347 drm_i915_private_t *dev_priv = dev->dev_private;
348 unsigned long irqflags;
349
350 if (!dev_priv->opregion.asle || !IS_MOBILE(dev))
351 return;
352
353 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
354
355 i915_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);
356 if (INTEL_INFO(dev)->gen >= 4)
357 i915_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
358
359 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
360 }
361
362 /**
363 * i915_pipe_enabled - check if a pipe is enabled
364 * @dev: DRM device
365 * @pipe: pipe to check
366 *
367 * Reading certain registers when the pipe is disabled can hang the chip.
368 * Use this routine to make sure the PLL is running and the pipe is active
369 * before reading such registers if unsure.
370 */
371 static int
372 i915_pipe_enabled(struct drm_device *dev, int pipe)
373 {
374 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
375
376 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
377 /* Locking is horribly broken here, but whatever. */
378 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
379 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
380
381 return intel_crtc->active;
382 } else {
383 return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
384 }
385 }
386
387 /* Called from drm generic code, passed a 'crtc', which
388 * we use as a pipe index
389 */
390 static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
391 {
392 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
393 unsigned long high_frame;
394 unsigned long low_frame;
395 u32 high1, high2, low;
396
397 if (!i915_pipe_enabled(dev, pipe)) {
398 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
399 "pipe %c\n", pipe_name(pipe));
400 return 0;
401 }
402
403 high_frame = PIPEFRAME(pipe);
404 low_frame = PIPEFRAMEPIXEL(pipe);
405
406 /*
407 * High & low register fields aren't synchronized, so make sure
408 * we get a low value that's stable across two reads of the high
409 * register.
410 */
411 do {
412 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
413 low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
414 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
415 } while (high1 != high2);
416
417 high1 >>= PIPE_FRAME_HIGH_SHIFT;
418 low >>= PIPE_FRAME_LOW_SHIFT;
419 return (high1 << 8) | low;
420 }
421
422 static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
423 {
424 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
425 int reg = PIPE_FRMCOUNT_GM45(pipe);
426
427 if (!i915_pipe_enabled(dev, pipe)) {
428 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
429 "pipe %c\n", pipe_name(pipe));
430 return 0;
431 }
432
433 return I915_READ(reg);
434 }
435
436 static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
437 int *vpos, int *hpos)
438 {
439 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
440 u32 vbl = 0, position = 0;
441 int vbl_start, vbl_end, htotal, vtotal;
442 bool in_vbl = true;
443 int ret = 0;
444 enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
445 pipe);
446
447 if (!i915_pipe_enabled(dev, pipe)) {
448 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
449 "pipe %c\n", pipe_name(pipe));
450 return 0;
451 }
452
453 /* Get vtotal. */
454 vtotal = 1 + ((I915_READ(VTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
455
456 if (INTEL_INFO(dev)->gen >= 4) {
457 /* No obvious pixelcount register. Only query vertical
458 * scanout position from Display scan line register.
459 */
460 position = I915_READ(PIPEDSL(pipe));
461
462 /* Decode into vertical scanout position. Don't have
463 * horizontal scanout position.
464 */
465 *vpos = position & 0x1fff;
466 *hpos = 0;
467 } else {
468 /* Have access to pixelcount since start of frame.
469 * We can split this into vertical and horizontal
470 * scanout position.
471 */
472 position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
473
474 htotal = 1 + ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
475 *vpos = position / htotal;
476 *hpos = position - (*vpos * htotal);
477 }
478
479 /* Query vblank area. */
480 vbl = I915_READ(VBLANK(cpu_transcoder));
481
482 /* Test position against vblank region. */
483 vbl_start = vbl & 0x1fff;
484 vbl_end = (vbl >> 16) & 0x1fff;
485
486 if ((*vpos < vbl_start) || (*vpos > vbl_end))
487 in_vbl = false;
488
489 /* Inside "upper part" of vblank area? Apply corrective offset: */
490 if (in_vbl && (*vpos >= vbl_start))
491 *vpos = *vpos - vtotal;
492
493 /* Readouts valid? */
494 if (vbl > 0)
495 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
496
497 /* In vblank? */
498 if (in_vbl)
499 ret |= DRM_SCANOUTPOS_INVBL;
500
501 return ret;
502 }
503
504 static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
505 int *max_error,
506 struct timeval *vblank_time,
507 unsigned flags)
508 {
509 struct drm_crtc *crtc;
510
511 if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) {
512 DRM_ERROR("Invalid crtc %d\n", pipe);
513 return -EINVAL;
514 }
515
516 /* Get drm_crtc to timestamp: */
517 crtc = intel_get_crtc_for_pipe(dev, pipe);
518 if (crtc == NULL) {
519 DRM_ERROR("Invalid crtc %d\n", pipe);
520 return -EINVAL;
521 }
522
523 if (!crtc->enabled) {
524 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
525 return -EBUSY;
526 }
527
528 /* Helper routine in DRM core does all the work: */
529 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
530 vblank_time, flags,
531 crtc);
532 }
533
534 static int intel_hpd_irq_event(struct drm_device *dev, struct drm_connector *connector)
535 {
536 enum drm_connector_status old_status;
537
538 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
539 old_status = connector->status;
540
541 connector->status = connector->funcs->detect(connector, false);
542 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
543 connector->base.id,
544 drm_get_connector_name(connector),
545 old_status, connector->status);
546 return (old_status != connector->status);
547 }
548
549 /*
550 * Handle hotplug events outside the interrupt handler proper.
551 */
552 #define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
553
554 static void i915_hotplug_work_func(struct work_struct *work)
555 {
556 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
557 hotplug_work);
558 struct drm_device *dev = dev_priv->dev;
559 struct drm_mode_config *mode_config = &dev->mode_config;
560 struct intel_connector *intel_connector;
561 struct intel_encoder *intel_encoder;
562 struct drm_connector *connector;
563 unsigned long irqflags;
564 bool hpd_disabled = false;
565 bool changed = false;
566 u32 hpd_event_bits;
567
568 /* HPD irq before everything is fully set up. */
569 if (!dev_priv->enable_hotplug_processing)
570 return;
571
572 mutex_lock(&mode_config->mutex);
573 DRM_DEBUG_KMS("running encoder hotplug functions\n");
574
575 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
576
577 hpd_event_bits = dev_priv->hpd_event_bits;
578 dev_priv->hpd_event_bits = 0;
579 list_for_each_entry(connector, &mode_config->connector_list, head) {
580 intel_connector = to_intel_connector(connector);
581 intel_encoder = intel_connector->encoder;
582 if (intel_encoder->hpd_pin > HPD_NONE &&
583 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
584 connector->polled == DRM_CONNECTOR_POLL_HPD) {
585 DRM_INFO("HPD interrupt storm detected on connector %s: "
586 "switching from hotplug detection to polling\n",
587 drm_get_connector_name(connector));
588 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED;
589 connector->polled = DRM_CONNECTOR_POLL_CONNECT
590 | DRM_CONNECTOR_POLL_DISCONNECT;
591 hpd_disabled = true;
592 }
593 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
594 DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
595 drm_get_connector_name(connector), intel_encoder->hpd_pin);
596 }
597 }
598 /* if there were no outputs to poll, poll was disabled,
599 * therefore make sure it's enabled when disabling HPD on
600 * some connectors */
601 if (hpd_disabled) {
602 drm_kms_helper_poll_enable(dev);
603 mod_timer(&dev_priv->hotplug_reenable_timer,
604 jiffies + msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY));
605 }
606
607 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
608
609 list_for_each_entry(connector, &mode_config->connector_list, head) {
610 intel_connector = to_intel_connector(connector);
611 intel_encoder = intel_connector->encoder;
612 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
613 if (intel_encoder->hot_plug)
614 intel_encoder->hot_plug(intel_encoder);
615 if (intel_hpd_irq_event(dev, connector))
616 changed = true;
617 }
618 }
619 mutex_unlock(&mode_config->mutex);
620
621 if (changed)
622 drm_kms_helper_hotplug_event(dev);
623 }
624
625 static void ironlake_handle_rps_change(struct drm_device *dev)
626 {
627 drm_i915_private_t *dev_priv = dev->dev_private;
628 u32 busy_up, busy_down, max_avg, min_avg;
629 u8 new_delay;
630 unsigned long flags;
631
632 spin_lock_irqsave(&mchdev_lock, flags);
633
634 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
635
636 new_delay = dev_priv->ips.cur_delay;
637
638 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
639 busy_up = I915_READ(RCPREVBSYTUPAVG);
640 busy_down = I915_READ(RCPREVBSYTDNAVG);
641 max_avg = I915_READ(RCBMAXAVG);
642 min_avg = I915_READ(RCBMINAVG);
643
644 /* Handle RCS change request from hw */
645 if (busy_up > max_avg) {
646 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
647 new_delay = dev_priv->ips.cur_delay - 1;
648 if (new_delay < dev_priv->ips.max_delay)
649 new_delay = dev_priv->ips.max_delay;
650 } else if (busy_down < min_avg) {
651 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
652 new_delay = dev_priv->ips.cur_delay + 1;
653 if (new_delay > dev_priv->ips.min_delay)
654 new_delay = dev_priv->ips.min_delay;
655 }
656
657 if (ironlake_set_drps(dev, new_delay))
658 dev_priv->ips.cur_delay = new_delay;
659
660 spin_unlock_irqrestore(&mchdev_lock, flags);
661
662 return;
663 }
664
665 static void notify_ring(struct drm_device *dev,
666 struct intel_ring_buffer *ring)
667 {
668 struct drm_i915_private *dev_priv = dev->dev_private;
669
670 if (ring->obj == NULL)
671 return;
672
673 trace_i915_gem_request_complete(ring, ring->get_seqno(ring, false));
674
675 wake_up_all(&ring->irq_queue);
676 if (i915_enable_hangcheck) {
677 mod_timer(&dev_priv->gpu_error.hangcheck_timer,
678 round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
679 }
680 }
681
682 static void gen6_pm_rps_work(struct work_struct *work)
683 {
684 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
685 rps.work);
686 u32 pm_iir, pm_imr;
687 u8 new_delay;
688
689 spin_lock_irq(&dev_priv->rps.lock);
690 pm_iir = dev_priv->rps.pm_iir;
691 dev_priv->rps.pm_iir = 0;
692 pm_imr = I915_READ(GEN6_PMIMR);
693 /* Make sure not to corrupt PMIMR state used by ringbuffer code */
694 I915_WRITE(GEN6_PMIMR, pm_imr & ~GEN6_PM_RPS_EVENTS);
695 spin_unlock_irq(&dev_priv->rps.lock);
696
697 if ((pm_iir & GEN6_PM_RPS_EVENTS) == 0)
698 return;
699
700 mutex_lock(&dev_priv->rps.hw_lock);
701
702 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD)
703 new_delay = dev_priv->rps.cur_delay + 1;
704 else
705 new_delay = dev_priv->rps.cur_delay - 1;
706
707 /* sysfs frequency interfaces may have snuck in while servicing the
708 * interrupt
709 */
710 if (!(new_delay > dev_priv->rps.max_delay ||
711 new_delay < dev_priv->rps.min_delay)) {
712 if (IS_VALLEYVIEW(dev_priv->dev))
713 valleyview_set_rps(dev_priv->dev, new_delay);
714 else
715 gen6_set_rps(dev_priv->dev, new_delay);
716 }
717
718 if (IS_VALLEYVIEW(dev_priv->dev)) {
719 /*
720 * On VLV, when we enter RC6 we may not be at the minimum
721 * voltage level, so arm a timer to check. It should only
722 * fire when there's activity or once after we've entered
723 * RC6, and then won't be re-armed until the next RPS interrupt.
724 */
725 mod_delayed_work(dev_priv->wq, &dev_priv->rps.vlv_work,
726 msecs_to_jiffies(100));
727 }
728
729 mutex_unlock(&dev_priv->rps.hw_lock);
730 }
731
732
733 /**
734 * ivybridge_parity_work - Workqueue called when a parity error interrupt
735 * occurred.
736 * @work: workqueue struct
737 *
738 * Doesn't actually do anything except notify userspace. As a consequence of
739 * this event, userspace should try to remap the bad rows since statistically
740 * it is likely the same row is more likely to go bad again.
741 */
742 static void ivybridge_parity_work(struct work_struct *work)
743 {
744 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
745 l3_parity.error_work);
746 u32 error_status, row, bank, subbank;
747 char *parity_event[5];
748 uint32_t misccpctl;
749 unsigned long flags;
750
751 /* We must turn off DOP level clock gating to access the L3 registers.
752 * In order to prevent a get/put style interface, acquire struct mutex
753 * any time we access those registers.
754 */
755 mutex_lock(&dev_priv->dev->struct_mutex);
756
757 misccpctl = I915_READ(GEN7_MISCCPCTL);
758 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
759 POSTING_READ(GEN7_MISCCPCTL);
760
761 error_status = I915_READ(GEN7_L3CDERRST1);
762 row = GEN7_PARITY_ERROR_ROW(error_status);
763 bank = GEN7_PARITY_ERROR_BANK(error_status);
764 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
765
766 I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID |
767 GEN7_L3CDERRST1_ENABLE);
768 POSTING_READ(GEN7_L3CDERRST1);
769
770 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
771
772 spin_lock_irqsave(&dev_priv->irq_lock, flags);
773 dev_priv->gt_irq_mask &= ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
774 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
775 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
776
777 mutex_unlock(&dev_priv->dev->struct_mutex);
778
779 parity_event[0] = "L3_PARITY_ERROR=1";
780 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
781 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
782 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
783 parity_event[4] = NULL;
784
785 kobject_uevent_env(&dev_priv->dev->primary->kdev.kobj,
786 KOBJ_CHANGE, parity_event);
787
788 DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
789 row, bank, subbank);
790
791 kfree(parity_event[3]);
792 kfree(parity_event[2]);
793 kfree(parity_event[1]);
794 }
795
796 static void ivybridge_handle_parity_error(struct drm_device *dev)
797 {
798 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
799 unsigned long flags;
800
801 if (!HAS_L3_GPU_CACHE(dev))
802 return;
803
804 spin_lock_irqsave(&dev_priv->irq_lock, flags);
805 dev_priv->gt_irq_mask |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
806 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
807 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
808
809 queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
810 }
811
812 static void snb_gt_irq_handler(struct drm_device *dev,
813 struct drm_i915_private *dev_priv,
814 u32 gt_iir)
815 {
816
817 if (gt_iir &
818 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
819 notify_ring(dev, &dev_priv->ring[RCS]);
820 if (gt_iir & GT_BSD_USER_INTERRUPT)
821 notify_ring(dev, &dev_priv->ring[VCS]);
822 if (gt_iir & GT_BLT_USER_INTERRUPT)
823 notify_ring(dev, &dev_priv->ring[BCS]);
824
825 if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
826 GT_BSD_CS_ERROR_INTERRUPT |
827 GT_RENDER_CS_MASTER_ERROR_INTERRUPT)) {
828 DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
829 i915_handle_error(dev, false);
830 }
831
832 if (gt_iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
833 ivybridge_handle_parity_error(dev);
834 }
835
836 /* Legacy way of handling PM interrupts */
837 static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
838 u32 pm_iir)
839 {
840 unsigned long flags;
841
842 /*
843 * IIR bits should never already be set because IMR should
844 * prevent an interrupt from being shown in IIR. The warning
845 * displays a case where we've unsafely cleared
846 * dev_priv->rps.pm_iir. Although missing an interrupt of the same
847 * type is not a problem, it displays a problem in the logic.
848 *
849 * The mask bit in IMR is cleared by dev_priv->rps.work.
850 */
851
852 spin_lock_irqsave(&dev_priv->rps.lock, flags);
853 dev_priv->rps.pm_iir |= pm_iir;
854 I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
855 POSTING_READ(GEN6_PMIMR);
856 spin_unlock_irqrestore(&dev_priv->rps.lock, flags);
857
858 queue_work(dev_priv->wq, &dev_priv->rps.work);
859 }
860
861 #define HPD_STORM_DETECT_PERIOD 1000
862 #define HPD_STORM_THRESHOLD 5
863
864 static inline bool hotplug_irq_storm_detect(struct drm_device *dev,
865 u32 hotplug_trigger,
866 const u32 *hpd)
867 {
868 drm_i915_private_t *dev_priv = dev->dev_private;
869 unsigned long irqflags;
870 int i;
871 bool ret = false;
872
873 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
874
875 for (i = 1; i < HPD_NUM_PINS; i++) {
876
877 if (!(hpd[i] & hotplug_trigger) ||
878 dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
879 continue;
880
881 dev_priv->hpd_event_bits |= (1 << i);
882 if (!time_in_range(jiffies, dev_priv->hpd_stats[i].hpd_last_jiffies,
883 dev_priv->hpd_stats[i].hpd_last_jiffies
884 + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) {
885 dev_priv->hpd_stats[i].hpd_last_jiffies = jiffies;
886 dev_priv->hpd_stats[i].hpd_cnt = 0;
887 } else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) {
888 dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
889 dev_priv->hpd_event_bits &= ~(1 << i);
890 DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
891 ret = true;
892 } else {
893 dev_priv->hpd_stats[i].hpd_cnt++;
894 }
895 }
896
897 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
898
899 return ret;
900 }
901
902 static void gmbus_irq_handler(struct drm_device *dev)
903 {
904 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
905
906 wake_up_all(&dev_priv->gmbus_wait_queue);
907 }
908
909 static void dp_aux_irq_handler(struct drm_device *dev)
910 {
911 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
912
913 wake_up_all(&dev_priv->gmbus_wait_queue);
914 }
915
916 /* Unlike gen6_queue_rps_work() from which this function is originally derived,
917 * we must be able to deal with other PM interrupts. This is complicated because
918 * of the way in which we use the masks to defer the RPS work (which for
919 * posterity is necessary because of forcewake).
920 */
921 static void hsw_pm_irq_handler(struct drm_i915_private *dev_priv,
922 u32 pm_iir)
923 {
924 unsigned long flags;
925
926 spin_lock_irqsave(&dev_priv->rps.lock, flags);
927 dev_priv->rps.pm_iir |= pm_iir & GEN6_PM_RPS_EVENTS;
928 if (dev_priv->rps.pm_iir) {
929 I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
930 /* never want to mask useful interrupts. (also posting read) */
931 WARN_ON(I915_READ_NOTRACE(GEN6_PMIMR) & ~GEN6_PM_RPS_EVENTS);
932 /* TODO: if queue_work is slow, move it out of the spinlock */
933 queue_work(dev_priv->wq, &dev_priv->rps.work);
934 }
935 spin_unlock_irqrestore(&dev_priv->rps.lock, flags);
936
937 if (pm_iir & ~GEN6_PM_RPS_EVENTS) {
938 if (pm_iir & PM_VEBOX_USER_INTERRUPT)
939 notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
940
941 if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) {
942 DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir);
943 i915_handle_error(dev_priv->dev, false);
944 }
945 }
946 }
947
948 static irqreturn_t valleyview_irq_handler(int irq, void *arg)
949 {
950 struct drm_device *dev = (struct drm_device *) arg;
951 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
952 u32 iir, gt_iir, pm_iir;
953 irqreturn_t ret = IRQ_NONE;
954 unsigned long irqflags;
955 int pipe;
956 u32 pipe_stats[I915_MAX_PIPES];
957
958 atomic_inc(&dev_priv->irq_received);
959
960 while (true) {
961 iir = I915_READ(VLV_IIR);
962 gt_iir = I915_READ(GTIIR);
963 pm_iir = I915_READ(GEN6_PMIIR);
964
965 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
966 goto out;
967
968 ret = IRQ_HANDLED;
969
970 snb_gt_irq_handler(dev, dev_priv, gt_iir);
971
972 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
973 for_each_pipe(pipe) {
974 int reg = PIPESTAT(pipe);
975 pipe_stats[pipe] = I915_READ(reg);
976
977 /*
978 * Clear the PIPE*STAT regs before the IIR
979 */
980 if (pipe_stats[pipe] & 0x8000ffff) {
981 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
982 DRM_DEBUG_DRIVER("pipe %c underrun\n",
983 pipe_name(pipe));
984 I915_WRITE(reg, pipe_stats[pipe]);
985 }
986 }
987 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
988
989 for_each_pipe(pipe) {
990 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
991 drm_handle_vblank(dev, pipe);
992
993 if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
994 intel_prepare_page_flip(dev, pipe);
995 intel_finish_page_flip(dev, pipe);
996 }
997 }
998
999 /* Consume port. Then clear IIR or we'll miss events */
1000 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
1001 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
1002 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
1003
1004 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
1005 hotplug_status);
1006 if (hotplug_trigger) {
1007 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_status_i915))
1008 i915_hpd_irq_setup(dev);
1009 queue_work(dev_priv->wq,
1010 &dev_priv->hotplug_work);
1011 }
1012 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
1013 I915_READ(PORT_HOTPLUG_STAT);
1014 }
1015
1016 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
1017 gmbus_irq_handler(dev);
1018
1019 if (pm_iir & GEN6_PM_RPS_EVENTS)
1020 gen6_queue_rps_work(dev_priv, pm_iir);
1021
1022 I915_WRITE(GTIIR, gt_iir);
1023 I915_WRITE(GEN6_PMIIR, pm_iir);
1024 I915_WRITE(VLV_IIR, iir);
1025 }
1026
1027 out:
1028 return ret;
1029 }
1030
1031 static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
1032 {
1033 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1034 int pipe;
1035 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
1036
1037 if (hotplug_trigger) {
1038 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_ibx))
1039 ibx_hpd_irq_setup(dev);
1040 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
1041 }
1042 if (pch_iir & SDE_AUDIO_POWER_MASK) {
1043 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
1044 SDE_AUDIO_POWER_SHIFT);
1045 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
1046 port_name(port));
1047 }
1048
1049 if (pch_iir & SDE_AUX_MASK)
1050 dp_aux_irq_handler(dev);
1051
1052 if (pch_iir & SDE_GMBUS)
1053 gmbus_irq_handler(dev);
1054
1055 if (pch_iir & SDE_AUDIO_HDCP_MASK)
1056 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1057
1058 if (pch_iir & SDE_AUDIO_TRANS_MASK)
1059 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1060
1061 if (pch_iir & SDE_POISON)
1062 DRM_ERROR("PCH poison interrupt\n");
1063
1064 if (pch_iir & SDE_FDI_MASK)
1065 for_each_pipe(pipe)
1066 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1067 pipe_name(pipe),
1068 I915_READ(FDI_RX_IIR(pipe)));
1069
1070 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
1071 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1072
1073 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
1074 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
1075
1076 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
1077 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1078 false))
1079 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1080
1081 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
1082 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1083 false))
1084 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1085 }
1086
1087 static void ivb_err_int_handler(struct drm_device *dev)
1088 {
1089 struct drm_i915_private *dev_priv = dev->dev_private;
1090 u32 err_int = I915_READ(GEN7_ERR_INT);
1091
1092 if (err_int & ERR_INT_POISON)
1093 DRM_ERROR("Poison interrupt\n");
1094
1095 if (err_int & ERR_INT_FIFO_UNDERRUN_A)
1096 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
1097 DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
1098
1099 if (err_int & ERR_INT_FIFO_UNDERRUN_B)
1100 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
1101 DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
1102
1103 if (err_int & ERR_INT_FIFO_UNDERRUN_C)
1104 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_C, false))
1105 DRM_DEBUG_DRIVER("Pipe C FIFO underrun\n");
1106
1107 I915_WRITE(GEN7_ERR_INT, err_int);
1108 }
1109
1110 static void cpt_serr_int_handler(struct drm_device *dev)
1111 {
1112 struct drm_i915_private *dev_priv = dev->dev_private;
1113 u32 serr_int = I915_READ(SERR_INT);
1114
1115 if (serr_int & SERR_INT_POISON)
1116 DRM_ERROR("PCH poison interrupt\n");
1117
1118 if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
1119 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1120 false))
1121 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1122
1123 if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
1124 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1125 false))
1126 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1127
1128 if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
1129 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_C,
1130 false))
1131 DRM_DEBUG_DRIVER("PCH transcoder C FIFO underrun\n");
1132
1133 I915_WRITE(SERR_INT, serr_int);
1134 }
1135
1136 static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
1137 {
1138 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1139 int pipe;
1140 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
1141
1142 if (hotplug_trigger) {
1143 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_cpt))
1144 ibx_hpd_irq_setup(dev);
1145 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
1146 }
1147 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
1148 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
1149 SDE_AUDIO_POWER_SHIFT_CPT);
1150 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
1151 port_name(port));
1152 }
1153
1154 if (pch_iir & SDE_AUX_MASK_CPT)
1155 dp_aux_irq_handler(dev);
1156
1157 if (pch_iir & SDE_GMBUS_CPT)
1158 gmbus_irq_handler(dev);
1159
1160 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
1161 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
1162
1163 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
1164 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
1165
1166 if (pch_iir & SDE_FDI_MASK_CPT)
1167 for_each_pipe(pipe)
1168 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1169 pipe_name(pipe),
1170 I915_READ(FDI_RX_IIR(pipe)));
1171
1172 if (pch_iir & SDE_ERROR_CPT)
1173 cpt_serr_int_handler(dev);
1174 }
1175
1176 static irqreturn_t ivybridge_irq_handler(int irq, void *arg)
1177 {
1178 struct drm_device *dev = (struct drm_device *) arg;
1179 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1180 u32 de_iir, gt_iir, de_ier, pm_iir, sde_ier = 0;
1181 irqreturn_t ret = IRQ_NONE;
1182 int i;
1183
1184 atomic_inc(&dev_priv->irq_received);
1185
1186 /* We get interrupts on unclaimed registers, so check for this before we
1187 * do any I915_{READ,WRITE}. */
1188 if (IS_HASWELL(dev) &&
1189 (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
1190 DRM_ERROR("Unclaimed register before interrupt\n");
1191 I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
1192 }
1193
1194 /* disable master interrupt before clearing iir */
1195 de_ier = I915_READ(DEIER);
1196 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
1197
1198 /* Disable south interrupts. We'll only write to SDEIIR once, so further
1199 * interrupts will will be stored on its back queue, and then we'll be
1200 * able to process them after we restore SDEIER (as soon as we restore
1201 * it, we'll get an interrupt if SDEIIR still has something to process
1202 * due to its back queue). */
1203 if (!HAS_PCH_NOP(dev)) {
1204 sde_ier = I915_READ(SDEIER);
1205 I915_WRITE(SDEIER, 0);
1206 POSTING_READ(SDEIER);
1207 }
1208
1209 /* On Haswell, also mask ERR_INT because we don't want to risk
1210 * generating "unclaimed register" interrupts from inside the interrupt
1211 * handler. */
1212 if (IS_HASWELL(dev))
1213 ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
1214
1215 gt_iir = I915_READ(GTIIR);
1216 if (gt_iir) {
1217 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1218 I915_WRITE(GTIIR, gt_iir);
1219 ret = IRQ_HANDLED;
1220 }
1221
1222 de_iir = I915_READ(DEIIR);
1223 if (de_iir) {
1224 if (de_iir & DE_ERR_INT_IVB)
1225 ivb_err_int_handler(dev);
1226
1227 if (de_iir & DE_AUX_CHANNEL_A_IVB)
1228 dp_aux_irq_handler(dev);
1229
1230 if (de_iir & DE_GSE_IVB)
1231 intel_opregion_asle_intr(dev);
1232
1233 for (i = 0; i < 3; i++) {
1234 if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
1235 drm_handle_vblank(dev, i);
1236 if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
1237 intel_prepare_page_flip(dev, i);
1238 intel_finish_page_flip_plane(dev, i);
1239 }
1240 }
1241
1242 /* check event from PCH */
1243 if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
1244 u32 pch_iir = I915_READ(SDEIIR);
1245
1246 cpt_irq_handler(dev, pch_iir);
1247
1248 /* clear PCH hotplug event before clear CPU irq */
1249 I915_WRITE(SDEIIR, pch_iir);
1250 }
1251
1252 I915_WRITE(DEIIR, de_iir);
1253 ret = IRQ_HANDLED;
1254 }
1255
1256 pm_iir = I915_READ(GEN6_PMIIR);
1257 if (pm_iir) {
1258 if (IS_HASWELL(dev))
1259 hsw_pm_irq_handler(dev_priv, pm_iir);
1260 else if (pm_iir & GEN6_PM_RPS_EVENTS)
1261 gen6_queue_rps_work(dev_priv, pm_iir);
1262 I915_WRITE(GEN6_PMIIR, pm_iir);
1263 ret = IRQ_HANDLED;
1264 }
1265
1266 if (IS_HASWELL(dev) && ivb_can_enable_err_int(dev))
1267 ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
1268
1269 I915_WRITE(DEIER, de_ier);
1270 POSTING_READ(DEIER);
1271 if (!HAS_PCH_NOP(dev)) {
1272 I915_WRITE(SDEIER, sde_ier);
1273 POSTING_READ(SDEIER);
1274 }
1275
1276 return ret;
1277 }
1278
1279 static void ilk_gt_irq_handler(struct drm_device *dev,
1280 struct drm_i915_private *dev_priv,
1281 u32 gt_iir)
1282 {
1283 if (gt_iir &
1284 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1285 notify_ring(dev, &dev_priv->ring[RCS]);
1286 if (gt_iir & ILK_BSD_USER_INTERRUPT)
1287 notify_ring(dev, &dev_priv->ring[VCS]);
1288 }
1289
1290 static irqreturn_t ironlake_irq_handler(int irq, void *arg)
1291 {
1292 struct drm_device *dev = (struct drm_device *) arg;
1293 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1294 int ret = IRQ_NONE;
1295 u32 de_iir, gt_iir, de_ier, pm_iir, sde_ier;
1296
1297 atomic_inc(&dev_priv->irq_received);
1298
1299 /* disable master interrupt before clearing iir */
1300 de_ier = I915_READ(DEIER);
1301 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
1302 POSTING_READ(DEIER);
1303
1304 /* Disable south interrupts. We'll only write to SDEIIR once, so further
1305 * interrupts will will be stored on its back queue, and then we'll be
1306 * able to process them after we restore SDEIER (as soon as we restore
1307 * it, we'll get an interrupt if SDEIIR still has something to process
1308 * due to its back queue). */
1309 sde_ier = I915_READ(SDEIER);
1310 I915_WRITE(SDEIER, 0);
1311 POSTING_READ(SDEIER);
1312
1313 de_iir = I915_READ(DEIIR);
1314 gt_iir = I915_READ(GTIIR);
1315 pm_iir = I915_READ(GEN6_PMIIR);
1316
1317 if (de_iir == 0 && gt_iir == 0 && (!IS_GEN6(dev) || pm_iir == 0))
1318 goto done;
1319
1320 ret = IRQ_HANDLED;
1321
1322 if (IS_GEN5(dev))
1323 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
1324 else
1325 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1326
1327 if (de_iir & DE_AUX_CHANNEL_A)
1328 dp_aux_irq_handler(dev);
1329
1330 if (de_iir & DE_GSE)
1331 intel_opregion_asle_intr(dev);
1332
1333 if (de_iir & DE_PIPEA_VBLANK)
1334 drm_handle_vblank(dev, 0);
1335
1336 if (de_iir & DE_PIPEB_VBLANK)
1337 drm_handle_vblank(dev, 1);
1338
1339 if (de_iir & DE_POISON)
1340 DRM_ERROR("Poison interrupt\n");
1341
1342 if (de_iir & DE_PIPEA_FIFO_UNDERRUN)
1343 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
1344 DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
1345
1346 if (de_iir & DE_PIPEB_FIFO_UNDERRUN)
1347 if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
1348 DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
1349
1350 if (de_iir & DE_PLANEA_FLIP_DONE) {
1351 intel_prepare_page_flip(dev, 0);
1352 intel_finish_page_flip_plane(dev, 0);
1353 }
1354
1355 if (de_iir & DE_PLANEB_FLIP_DONE) {
1356 intel_prepare_page_flip(dev, 1);
1357 intel_finish_page_flip_plane(dev, 1);
1358 }
1359
1360 /* check event from PCH */
1361 if (de_iir & DE_PCH_EVENT) {
1362 u32 pch_iir = I915_READ(SDEIIR);
1363
1364 if (HAS_PCH_CPT(dev))
1365 cpt_irq_handler(dev, pch_iir);
1366 else
1367 ibx_irq_handler(dev, pch_iir);
1368
1369 /* should clear PCH hotplug event before clear CPU irq */
1370 I915_WRITE(SDEIIR, pch_iir);
1371 }
1372
1373 if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
1374 ironlake_handle_rps_change(dev);
1375
1376 if (IS_GEN6(dev) && pm_iir & GEN6_PM_RPS_EVENTS)
1377 gen6_queue_rps_work(dev_priv, pm_iir);
1378
1379 I915_WRITE(GTIIR, gt_iir);
1380 I915_WRITE(DEIIR, de_iir);
1381 I915_WRITE(GEN6_PMIIR, pm_iir);
1382
1383 done:
1384 I915_WRITE(DEIER, de_ier);
1385 POSTING_READ(DEIER);
1386 I915_WRITE(SDEIER, sde_ier);
1387 POSTING_READ(SDEIER);
1388
1389 return ret;
1390 }
1391
1392 /**
1393 * i915_error_work_func - do process context error handling work
1394 * @work: work struct
1395 *
1396 * Fire an error uevent so userspace can see that a hang or error
1397 * was detected.
1398 */
1399 static void i915_error_work_func(struct work_struct *work)
1400 {
1401 struct i915_gpu_error *error = container_of(work, struct i915_gpu_error,
1402 work);
1403 drm_i915_private_t *dev_priv = container_of(error, drm_i915_private_t,
1404 gpu_error);
1405 struct drm_device *dev = dev_priv->dev;
1406 struct intel_ring_buffer *ring;
1407 char *error_event[] = { "ERROR=1", NULL };
1408 char *reset_event[] = { "RESET=1", NULL };
1409 char *reset_done_event[] = { "ERROR=0", NULL };
1410 int i, ret;
1411
1412 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
1413
1414 /*
1415 * Note that there's only one work item which does gpu resets, so we
1416 * need not worry about concurrent gpu resets potentially incrementing
1417 * error->reset_counter twice. We only need to take care of another
1418 * racing irq/hangcheck declaring the gpu dead for a second time. A
1419 * quick check for that is good enough: schedule_work ensures the
1420 * correct ordering between hang detection and this work item, and since
1421 * the reset in-progress bit is only ever set by code outside of this
1422 * work we don't need to worry about any other races.
1423 */
1424 if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) {
1425 DRM_DEBUG_DRIVER("resetting chip\n");
1426 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE,
1427 reset_event);
1428
1429 ret = i915_reset(dev);
1430
1431 if (ret == 0) {
1432 /*
1433 * After all the gem state is reset, increment the reset
1434 * counter and wake up everyone waiting for the reset to
1435 * complete.
1436 *
1437 * Since unlock operations are a one-sided barrier only,
1438 * we need to insert a barrier here to order any seqno
1439 * updates before
1440 * the counter increment.
1441 */
1442 smp_mb__before_atomic_inc();
1443 atomic_inc(&dev_priv->gpu_error.reset_counter);
1444
1445 kobject_uevent_env(&dev->primary->kdev.kobj,
1446 KOBJ_CHANGE, reset_done_event);
1447 } else {
1448 atomic_set(&error->reset_counter, I915_WEDGED);
1449 }
1450
1451 for_each_ring(ring, dev_priv, i)
1452 wake_up_all(&ring->irq_queue);
1453
1454 intel_display_handle_reset(dev);
1455
1456 wake_up_all(&dev_priv->gpu_error.reset_queue);
1457 }
1458 }
1459
1460 /* NB: please notice the memset */
1461 static void i915_get_extra_instdone(struct drm_device *dev,
1462 uint32_t *instdone)
1463 {
1464 struct drm_i915_private *dev_priv = dev->dev_private;
1465 memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
1466
1467 switch(INTEL_INFO(dev)->gen) {
1468 case 2:
1469 case 3:
1470 instdone[0] = I915_READ(INSTDONE);
1471 break;
1472 case 4:
1473 case 5:
1474 case 6:
1475 instdone[0] = I915_READ(INSTDONE_I965);
1476 instdone[1] = I915_READ(INSTDONE1);
1477 break;
1478 default:
1479 WARN_ONCE(1, "Unsupported platform\n");
1480 case 7:
1481 instdone[0] = I915_READ(GEN7_INSTDONE_1);
1482 instdone[1] = I915_READ(GEN7_SC_INSTDONE);
1483 instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
1484 instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
1485 break;
1486 }
1487 }
1488
1489 #ifdef CONFIG_DEBUG_FS
1490 static struct drm_i915_error_object *
1491 i915_error_object_create_sized(struct drm_i915_private *dev_priv,
1492 struct drm_i915_gem_object *src,
1493 const int num_pages)
1494 {
1495 struct drm_i915_error_object *dst;
1496 int i;
1497 u32 reloc_offset;
1498
1499 if (src == NULL || src->pages == NULL)
1500 return NULL;
1501
1502 dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
1503 if (dst == NULL)
1504 return NULL;
1505
1506 reloc_offset = src->gtt_offset;
1507 for (i = 0; i < num_pages; i++) {
1508 unsigned long flags;
1509 void *d;
1510
1511 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
1512 if (d == NULL)
1513 goto unwind;
1514
1515 local_irq_save(flags);
1516 if (reloc_offset < dev_priv->gtt.mappable_end &&
1517 src->has_global_gtt_mapping) {
1518 void __iomem *s;
1519
1520 /* Simply ignore tiling or any overlapping fence.
1521 * It's part of the error state, and this hopefully
1522 * captures what the GPU read.
1523 */
1524
1525 s = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
1526 reloc_offset);
1527 memcpy_fromio(d, s, PAGE_SIZE);
1528 io_mapping_unmap_atomic(s);
1529 } else if (src->stolen) {
1530 unsigned long offset;
1531
1532 offset = dev_priv->mm.stolen_base;
1533 offset += src->stolen->start;
1534 offset += i << PAGE_SHIFT;
1535
1536 memcpy_fromio(d, (void __iomem *) offset, PAGE_SIZE);
1537 } else {
1538 struct page *page;
1539 void *s;
1540
1541 page = i915_gem_object_get_page(src, i);
1542
1543 drm_clflush_pages(&page, 1);
1544
1545 s = kmap_atomic(page);
1546 memcpy(d, s, PAGE_SIZE);
1547 kunmap_atomic(s);
1548
1549 drm_clflush_pages(&page, 1);
1550 }
1551 local_irq_restore(flags);
1552
1553 dst->pages[i] = d;
1554
1555 reloc_offset += PAGE_SIZE;
1556 }
1557 dst->page_count = num_pages;
1558 dst->gtt_offset = src->gtt_offset;
1559
1560 return dst;
1561
1562 unwind:
1563 while (i--)
1564 kfree(dst->pages[i]);
1565 kfree(dst);
1566 return NULL;
1567 }
1568 #define i915_error_object_create(dev_priv, src) \
1569 i915_error_object_create_sized((dev_priv), (src), \
1570 (src)->base.size>>PAGE_SHIFT)
1571
1572 static void
1573 i915_error_object_free(struct drm_i915_error_object *obj)
1574 {
1575 int page;
1576
1577 if (obj == NULL)
1578 return;
1579
1580 for (page = 0; page < obj->page_count; page++)
1581 kfree(obj->pages[page]);
1582
1583 kfree(obj);
1584 }
1585
1586 void
1587 i915_error_state_free(struct kref *error_ref)
1588 {
1589 struct drm_i915_error_state *error = container_of(error_ref,
1590 typeof(*error), ref);
1591 int i;
1592
1593 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
1594 i915_error_object_free(error->ring[i].batchbuffer);
1595 i915_error_object_free(error->ring[i].ringbuffer);
1596 i915_error_object_free(error->ring[i].ctx);
1597 kfree(error->ring[i].requests);
1598 }
1599
1600 kfree(error->active_bo);
1601 kfree(error->overlay);
1602 kfree(error->display);
1603 kfree(error);
1604 }
1605 static void capture_bo(struct drm_i915_error_buffer *err,
1606 struct drm_i915_gem_object *obj)
1607 {
1608 err->size = obj->base.size;
1609 err->name = obj->base.name;
1610 err->rseqno = obj->last_read_seqno;
1611 err->wseqno = obj->last_write_seqno;
1612 err->gtt_offset = obj->gtt_offset;
1613 err->read_domains = obj->base.read_domains;
1614 err->write_domain = obj->base.write_domain;
1615 err->fence_reg = obj->fence_reg;
1616 err->pinned = 0;
1617 if (obj->pin_count > 0)
1618 err->pinned = 1;
1619 if (obj->user_pin_count > 0)
1620 err->pinned = -1;
1621 err->tiling = obj->tiling_mode;
1622 err->dirty = obj->dirty;
1623 err->purgeable = obj->madv != I915_MADV_WILLNEED;
1624 err->ring = obj->ring ? obj->ring->id : -1;
1625 err->cache_level = obj->cache_level;
1626 }
1627
1628 static u32 capture_active_bo(struct drm_i915_error_buffer *err,
1629 int count, struct list_head *head)
1630 {
1631 struct drm_i915_gem_object *obj;
1632 int i = 0;
1633
1634 list_for_each_entry(obj, head, mm_list) {
1635 capture_bo(err++, obj);
1636 if (++i == count)
1637 break;
1638 }
1639
1640 return i;
1641 }
1642
1643 static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
1644 int count, struct list_head *head)
1645 {
1646 struct drm_i915_gem_object *obj;
1647 int i = 0;
1648
1649 list_for_each_entry(obj, head, global_list) {
1650 if (obj->pin_count == 0)
1651 continue;
1652
1653 capture_bo(err++, obj);
1654 if (++i == count)
1655 break;
1656 }
1657
1658 return i;
1659 }
1660
1661 static void i915_gem_record_fences(struct drm_device *dev,
1662 struct drm_i915_error_state *error)
1663 {
1664 struct drm_i915_private *dev_priv = dev->dev_private;
1665 int i;
1666
1667 /* Fences */
1668 switch (INTEL_INFO(dev)->gen) {
1669 case 7:
1670 case 6:
1671 for (i = 0; i < dev_priv->num_fence_regs; i++)
1672 error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
1673 break;
1674 case 5:
1675 case 4:
1676 for (i = 0; i < 16; i++)
1677 error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
1678 break;
1679 case 3:
1680 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
1681 for (i = 0; i < 8; i++)
1682 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
1683 case 2:
1684 for (i = 0; i < 8; i++)
1685 error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
1686 break;
1687
1688 default:
1689 BUG();
1690 }
1691 }
1692
1693 static struct drm_i915_error_object *
1694 i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
1695 struct intel_ring_buffer *ring)
1696 {
1697 struct drm_i915_gem_object *obj;
1698 u32 seqno;
1699
1700 if (!ring->get_seqno)
1701 return NULL;
1702
1703 if (HAS_BROKEN_CS_TLB(dev_priv->dev)) {
1704 u32 acthd = I915_READ(ACTHD);
1705
1706 if (WARN_ON(ring->id != RCS))
1707 return NULL;
1708
1709 obj = ring->private;
1710 if (acthd >= obj->gtt_offset &&
1711 acthd < obj->gtt_offset + obj->base.size)
1712 return i915_error_object_create(dev_priv, obj);
1713 }
1714
1715 seqno = ring->get_seqno(ring, false);
1716 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
1717 if (obj->ring != ring)
1718 continue;
1719
1720 if (i915_seqno_passed(seqno, obj->last_read_seqno))
1721 continue;
1722
1723 if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
1724 continue;
1725
1726 /* We need to copy these to an anonymous buffer as the simplest
1727 * method to avoid being overwritten by userspace.
1728 */
1729 return i915_error_object_create(dev_priv, obj);
1730 }
1731
1732 return NULL;
1733 }
1734
1735 static void i915_record_ring_state(struct drm_device *dev,
1736 struct drm_i915_error_state *error,
1737 struct intel_ring_buffer *ring)
1738 {
1739 struct drm_i915_private *dev_priv = dev->dev_private;
1740
1741 if (INTEL_INFO(dev)->gen >= 6) {
1742 error->rc_psmi[ring->id] = I915_READ(ring->mmio_base + 0x50);
1743 error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
1744 error->semaphore_mboxes[ring->id][0]
1745 = I915_READ(RING_SYNC_0(ring->mmio_base));
1746 error->semaphore_mboxes[ring->id][1]
1747 = I915_READ(RING_SYNC_1(ring->mmio_base));
1748 error->semaphore_seqno[ring->id][0] = ring->sync_seqno[0];
1749 error->semaphore_seqno[ring->id][1] = ring->sync_seqno[1];
1750 }
1751
1752 if (INTEL_INFO(dev)->gen >= 4) {
1753 error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
1754 error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
1755 error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
1756 error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
1757 error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
1758 if (ring->id == RCS)
1759 error->bbaddr = I915_READ64(BB_ADDR);
1760 } else {
1761 error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX);
1762 error->ipeir[ring->id] = I915_READ(IPEIR);
1763 error->ipehr[ring->id] = I915_READ(IPEHR);
1764 error->instdone[ring->id] = I915_READ(INSTDONE);
1765 }
1766
1767 error->waiting[ring->id] = waitqueue_active(&ring->irq_queue);
1768 error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
1769 error->seqno[ring->id] = ring->get_seqno(ring, false);
1770 error->acthd[ring->id] = intel_ring_get_active_head(ring);
1771 error->head[ring->id] = I915_READ_HEAD(ring);
1772 error->tail[ring->id] = I915_READ_TAIL(ring);
1773 error->ctl[ring->id] = I915_READ_CTL(ring);
1774
1775 error->cpu_ring_head[ring->id] = ring->head;
1776 error->cpu_ring_tail[ring->id] = ring->tail;
1777 }
1778
1779
1780 static void i915_gem_record_active_context(struct intel_ring_buffer *ring,
1781 struct drm_i915_error_state *error,
1782 struct drm_i915_error_ring *ering)
1783 {
1784 struct drm_i915_private *dev_priv = ring->dev->dev_private;
1785 struct drm_i915_gem_object *obj;
1786
1787 /* Currently render ring is the only HW context user */
1788 if (ring->id != RCS || !error->ccid)
1789 return;
1790
1791 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
1792 if ((error->ccid & PAGE_MASK) == obj->gtt_offset) {
1793 ering->ctx = i915_error_object_create_sized(dev_priv,
1794 obj, 1);
1795 }
1796 }
1797 }
1798
1799 static void i915_gem_record_rings(struct drm_device *dev,
1800 struct drm_i915_error_state *error)
1801 {
1802 struct drm_i915_private *dev_priv = dev->dev_private;
1803 struct intel_ring_buffer *ring;
1804 struct drm_i915_gem_request *request;
1805 int i, count;
1806
1807 for_each_ring(ring, dev_priv, i) {
1808 i915_record_ring_state(dev, error, ring);
1809
1810 error->ring[i].batchbuffer =
1811 i915_error_first_batchbuffer(dev_priv, ring);
1812
1813 error->ring[i].ringbuffer =
1814 i915_error_object_create(dev_priv, ring->obj);
1815
1816
1817 i915_gem_record_active_context(ring, error, &error->ring[i]);
1818
1819 count = 0;
1820 list_for_each_entry(request, &ring->request_list, list)
1821 count++;
1822
1823 error->ring[i].num_requests = count;
1824 error->ring[i].requests =
1825 kmalloc(count*sizeof(struct drm_i915_error_request),
1826 GFP_ATOMIC);
1827 if (error->ring[i].requests == NULL) {
1828 error->ring[i].num_requests = 0;
1829 continue;
1830 }
1831
1832 count = 0;
1833 list_for_each_entry(request, &ring->request_list, list) {
1834 struct drm_i915_error_request *erq;
1835
1836 erq = &error->ring[i].requests[count++];
1837 erq->seqno = request->seqno;
1838 erq->jiffies = request->emitted_jiffies;
1839 erq->tail = request->tail;
1840 }
1841 }
1842 }
1843
1844 /**
1845 * i915_capture_error_state - capture an error record for later analysis
1846 * @dev: drm device
1847 *
1848 * Should be called when an error is detected (either a hang or an error
1849 * interrupt) to capture error state from the time of the error. Fills
1850 * out a structure which becomes available in debugfs for user level tools
1851 * to pick up.
1852 */
1853 static void i915_capture_error_state(struct drm_device *dev)
1854 {
1855 struct drm_i915_private *dev_priv = dev->dev_private;
1856 struct drm_i915_gem_object *obj;
1857 struct drm_i915_error_state *error;
1858 unsigned long flags;
1859 int i, pipe;
1860
1861 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1862 error = dev_priv->gpu_error.first_error;
1863 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1864 if (error)
1865 return;
1866
1867 /* Account for pipe specific data like PIPE*STAT */
1868 error = kzalloc(sizeof(*error), GFP_ATOMIC);
1869 if (!error) {
1870 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
1871 return;
1872 }
1873
1874 DRM_INFO("capturing error event; look for more information in "
1875 "/sys/kernel/debug/dri/%d/i915_error_state\n",
1876 dev->primary->index);
1877
1878 kref_init(&error->ref);
1879 error->eir = I915_READ(EIR);
1880 error->pgtbl_er = I915_READ(PGTBL_ER);
1881 if (HAS_HW_CONTEXTS(dev))
1882 error->ccid = I915_READ(CCID);
1883
1884 if (HAS_PCH_SPLIT(dev))
1885 error->ier = I915_READ(DEIER) | I915_READ(GTIER);
1886 else if (IS_VALLEYVIEW(dev))
1887 error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
1888 else if (IS_GEN2(dev))
1889 error->ier = I915_READ16(IER);
1890 else
1891 error->ier = I915_READ(IER);
1892
1893 if (INTEL_INFO(dev)->gen >= 6)
1894 error->derrmr = I915_READ(DERRMR);
1895
1896 if (IS_VALLEYVIEW(dev))
1897 error->forcewake = I915_READ(FORCEWAKE_VLV);
1898 else if (INTEL_INFO(dev)->gen >= 7)
1899 error->forcewake = I915_READ(FORCEWAKE_MT);
1900 else if (INTEL_INFO(dev)->gen == 6)
1901 error->forcewake = I915_READ(FORCEWAKE);
1902
1903 if (!HAS_PCH_SPLIT(dev))
1904 for_each_pipe(pipe)
1905 error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
1906
1907 if (INTEL_INFO(dev)->gen >= 6) {
1908 error->error = I915_READ(ERROR_GEN6);
1909 error->done_reg = I915_READ(DONE_REG);
1910 }
1911
1912 if (INTEL_INFO(dev)->gen == 7)
1913 error->err_int = I915_READ(GEN7_ERR_INT);
1914
1915 i915_get_extra_instdone(dev, error->extra_instdone);
1916
1917 i915_gem_record_fences(dev, error);
1918 i915_gem_record_rings(dev, error);
1919
1920 /* Record buffers on the active and pinned lists. */
1921 error->active_bo = NULL;
1922 error->pinned_bo = NULL;
1923
1924 i = 0;
1925 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
1926 i++;
1927 error->active_bo_count = i;
1928 list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
1929 if (obj->pin_count)
1930 i++;
1931 error->pinned_bo_count = i - error->active_bo_count;
1932
1933 error->active_bo = NULL;
1934 error->pinned_bo = NULL;
1935 if (i) {
1936 error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
1937 GFP_ATOMIC);
1938 if (error->active_bo)
1939 error->pinned_bo =
1940 error->active_bo + error->active_bo_count;
1941 }
1942
1943 if (error->active_bo)
1944 error->active_bo_count =
1945 capture_active_bo(error->active_bo,
1946 error->active_bo_count,
1947 &dev_priv->mm.active_list);
1948
1949 if (error->pinned_bo)
1950 error->pinned_bo_count =
1951 capture_pinned_bo(error->pinned_bo,
1952 error->pinned_bo_count,
1953 &dev_priv->mm.bound_list);
1954
1955 do_gettimeofday(&error->time);
1956
1957 error->overlay = intel_overlay_capture_error_state(dev);
1958 error->display = intel_display_capture_error_state(dev);
1959
1960 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1961 if (dev_priv->gpu_error.first_error == NULL) {
1962 dev_priv->gpu_error.first_error = error;
1963 error = NULL;
1964 }
1965 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1966
1967 if (error)
1968 i915_error_state_free(&error->ref);
1969 }
1970
1971 void i915_destroy_error_state(struct drm_device *dev)
1972 {
1973 struct drm_i915_private *dev_priv = dev->dev_private;
1974 struct drm_i915_error_state *error;
1975 unsigned long flags;
1976
1977 spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1978 error = dev_priv->gpu_error.first_error;
1979 dev_priv->gpu_error.first_error = NULL;
1980 spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1981
1982 if (error)
1983 kref_put(&error->ref, i915_error_state_free);
1984 }
1985 #else
1986 #define i915_capture_error_state(x)
1987 #endif
1988
1989 static void i915_report_and_clear_eir(struct drm_device *dev)
1990 {
1991 struct drm_i915_private *dev_priv = dev->dev_private;
1992 uint32_t instdone[I915_NUM_INSTDONE_REG];
1993 u32 eir = I915_READ(EIR);
1994 int pipe, i;
1995
1996 if (!eir)
1997 return;
1998
1999 pr_err("render error detected, EIR: 0x%08x\n", eir);
2000
2001 i915_get_extra_instdone(dev, instdone);
2002
2003 if (IS_G4X(dev)) {
2004 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
2005 u32 ipeir = I915_READ(IPEIR_I965);
2006
2007 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2008 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2009 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2010 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2011 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2012 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2013 I915_WRITE(IPEIR_I965, ipeir);
2014 POSTING_READ(IPEIR_I965);
2015 }
2016 if (eir & GM45_ERROR_PAGE_TABLE) {
2017 u32 pgtbl_err = I915_READ(PGTBL_ER);
2018 pr_err("page table error\n");
2019 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2020 I915_WRITE(PGTBL_ER, pgtbl_err);
2021 POSTING_READ(PGTBL_ER);
2022 }
2023 }
2024
2025 if (!IS_GEN2(dev)) {
2026 if (eir & I915_ERROR_PAGE_TABLE) {
2027 u32 pgtbl_err = I915_READ(PGTBL_ER);
2028 pr_err("page table error\n");
2029 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2030 I915_WRITE(PGTBL_ER, pgtbl_err);
2031 POSTING_READ(PGTBL_ER);
2032 }
2033 }
2034
2035 if (eir & I915_ERROR_MEMORY_REFRESH) {
2036 pr_err("memory refresh error:\n");
2037 for_each_pipe(pipe)
2038 pr_err("pipe %c stat: 0x%08x\n",
2039 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
2040 /* pipestat has already been acked */
2041 }
2042 if (eir & I915_ERROR_INSTRUCTION) {
2043 pr_err("instruction error\n");
2044 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
2045 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2046 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2047 if (INTEL_INFO(dev)->gen < 4) {
2048 u32 ipeir = I915_READ(IPEIR);
2049
2050 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
2051 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
2052 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
2053 I915_WRITE(IPEIR, ipeir);
2054 POSTING_READ(IPEIR);
2055 } else {
2056 u32 ipeir = I915_READ(IPEIR_I965);
2057
2058 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2059 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2060 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2061 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2062 I915_WRITE(IPEIR_I965, ipeir);
2063 POSTING_READ(IPEIR_I965);
2064 }
2065 }
2066
2067 I915_WRITE(EIR, eir);
2068 POSTING_READ(EIR);
2069 eir = I915_READ(EIR);
2070 if (eir) {
2071 /*
2072 * some errors might have become stuck,
2073 * mask them.
2074 */
2075 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
2076 I915_WRITE(EMR, I915_READ(EMR) | eir);
2077 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2078 }
2079 }
2080
2081 /**
2082 * i915_handle_error - handle an error interrupt
2083 * @dev: drm device
2084 *
2085 * Do some basic checking of regsiter state at error interrupt time and
2086 * dump it to the syslog. Also call i915_capture_error_state() to make
2087 * sure we get a record and make it available in debugfs. Fire a uevent
2088 * so userspace knows something bad happened (should trigger collection
2089 * of a ring dump etc.).
2090 */
2091 void i915_handle_error(struct drm_device *dev, bool wedged)
2092 {
2093 struct drm_i915_private *dev_priv = dev->dev_private;
2094 struct intel_ring_buffer *ring;
2095 int i;
2096
2097 i915_capture_error_state(dev);
2098 i915_report_and_clear_eir(dev);
2099
2100 if (wedged) {
2101 atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG,
2102 &dev_priv->gpu_error.reset_counter);
2103
2104 /*
2105 * Wakeup waiting processes so that the reset work item
2106 * doesn't deadlock trying to grab various locks.
2107 */
2108 for_each_ring(ring, dev_priv, i)
2109 wake_up_all(&ring->irq_queue);
2110 }
2111
2112 queue_work(dev_priv->wq, &dev_priv->gpu_error.work);
2113 }
2114
2115 static void __always_unused i915_pageflip_stall_check(struct drm_device *dev, int pipe)
2116 {
2117 drm_i915_private_t *dev_priv = dev->dev_private;
2118 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
2119 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2120 struct drm_i915_gem_object *obj;
2121 struct intel_unpin_work *work;
2122 unsigned long flags;
2123 bool stall_detected;
2124
2125 /* Ignore early vblank irqs */
2126 if (intel_crtc == NULL)
2127 return;
2128
2129 spin_lock_irqsave(&dev->event_lock, flags);
2130 work = intel_crtc->unpin_work;
2131
2132 if (work == NULL ||
2133 atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE ||
2134 !work->enable_stall_check) {
2135 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
2136 spin_unlock_irqrestore(&dev->event_lock, flags);
2137 return;
2138 }
2139
2140 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
2141 obj = work->pending_flip_obj;
2142 if (INTEL_INFO(dev)->gen >= 4) {
2143 int dspsurf = DSPSURF(intel_crtc->plane);
2144 stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
2145 obj->gtt_offset;
2146 } else {
2147 int dspaddr = DSPADDR(intel_crtc->plane);
2148 stall_detected = I915_READ(dspaddr) == (obj->gtt_offset +
2149 crtc->y * crtc->fb->pitches[0] +
2150 crtc->x * crtc->fb->bits_per_pixel/8);
2151 }
2152
2153 spin_unlock_irqrestore(&dev->event_lock, flags);
2154
2155 if (stall_detected) {
2156 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
2157 intel_prepare_page_flip(dev, intel_crtc->plane);
2158 }
2159 }
2160
2161 /* Called from drm generic code, passed 'crtc' which
2162 * we use as a pipe index
2163 */
2164 static int i915_enable_vblank(struct drm_device *dev, int pipe)
2165 {
2166 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2167 unsigned long irqflags;
2168
2169 if (!i915_pipe_enabled(dev, pipe))
2170 return -EINVAL;
2171
2172 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2173 if (INTEL_INFO(dev)->gen >= 4)
2174 i915_enable_pipestat(dev_priv, pipe,
2175 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2176 else
2177 i915_enable_pipestat(dev_priv, pipe,
2178 PIPE_VBLANK_INTERRUPT_ENABLE);
2179
2180 /* maintain vblank delivery even in deep C-states */
2181 if (dev_priv->info->gen == 3)
2182 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
2183 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2184
2185 return 0;
2186 }
2187
2188 static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
2189 {
2190 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2191 unsigned long irqflags;
2192
2193 if (!i915_pipe_enabled(dev, pipe))
2194 return -EINVAL;
2195
2196 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2197 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
2198 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
2199 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2200
2201 return 0;
2202 }
2203
2204 static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
2205 {
2206 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2207 unsigned long irqflags;
2208
2209 if (!i915_pipe_enabled(dev, pipe))
2210 return -EINVAL;
2211
2212 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2213 ironlake_enable_display_irq(dev_priv,
2214 DE_PIPEA_VBLANK_IVB << (5 * pipe));
2215 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2216
2217 return 0;
2218 }
2219
2220 static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
2221 {
2222 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2223 unsigned long irqflags;
2224 u32 imr;
2225
2226 if (!i915_pipe_enabled(dev, pipe))
2227 return -EINVAL;
2228
2229 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2230 imr = I915_READ(VLV_IMR);
2231 if (pipe == 0)
2232 imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
2233 else
2234 imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2235 I915_WRITE(VLV_IMR, imr);
2236 i915_enable_pipestat(dev_priv, pipe,
2237 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2238 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2239
2240 return 0;
2241 }
2242
2243 /* Called from drm generic code, passed 'crtc' which
2244 * we use as a pipe index
2245 */
2246 static void i915_disable_vblank(struct drm_device *dev, int pipe)
2247 {
2248 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2249 unsigned long irqflags;
2250
2251 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2252 if (dev_priv->info->gen == 3)
2253 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
2254
2255 i915_disable_pipestat(dev_priv, pipe,
2256 PIPE_VBLANK_INTERRUPT_ENABLE |
2257 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2258 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2259 }
2260
2261 static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
2262 {
2263 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2264 unsigned long irqflags;
2265
2266 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2267 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
2268 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
2269 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2270 }
2271
2272 static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
2273 {
2274 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2275 unsigned long irqflags;
2276
2277 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2278 ironlake_disable_display_irq(dev_priv,
2279 DE_PIPEA_VBLANK_IVB << (pipe * 5));
2280 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2281 }
2282
2283 static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
2284 {
2285 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2286 unsigned long irqflags;
2287 u32 imr;
2288
2289 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2290 i915_disable_pipestat(dev_priv, pipe,
2291 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2292 imr = I915_READ(VLV_IMR);
2293 if (pipe == 0)
2294 imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
2295 else
2296 imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2297 I915_WRITE(VLV_IMR, imr);
2298 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2299 }
2300
2301 static u32
2302 ring_last_seqno(struct intel_ring_buffer *ring)
2303 {
2304 return list_entry(ring->request_list.prev,
2305 struct drm_i915_gem_request, list)->seqno;
2306 }
2307
2308 static bool
2309 ring_idle(struct intel_ring_buffer *ring, u32 seqno)
2310 {
2311 return (list_empty(&ring->request_list) ||
2312 i915_seqno_passed(seqno, ring_last_seqno(ring)));
2313 }
2314
2315 static struct intel_ring_buffer *
2316 semaphore_waits_for(struct intel_ring_buffer *ring, u32 *seqno)
2317 {
2318 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2319 u32 cmd, ipehr, acthd, acthd_min;
2320
2321 ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
2322 if ((ipehr & ~(0x3 << 16)) !=
2323 (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE | MI_SEMAPHORE_REGISTER))
2324 return NULL;
2325
2326 /* ACTHD is likely pointing to the dword after the actual command,
2327 * so scan backwards until we find the MBOX.
2328 */
2329 acthd = intel_ring_get_active_head(ring) & HEAD_ADDR;
2330 acthd_min = max((int)acthd - 3 * 4, 0);
2331 do {
2332 cmd = ioread32(ring->virtual_start + acthd);
2333 if (cmd == ipehr)
2334 break;
2335
2336 acthd -= 4;
2337 if (acthd < acthd_min)
2338 return NULL;
2339 } while (1);
2340
2341 *seqno = ioread32(ring->virtual_start+acthd+4)+1;
2342 return &dev_priv->ring[(ring->id + (((ipehr >> 17) & 1) + 1)) % 3];
2343 }
2344
2345 static int semaphore_passed(struct intel_ring_buffer *ring)
2346 {
2347 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2348 struct intel_ring_buffer *signaller;
2349 u32 seqno, ctl;
2350
2351 ring->hangcheck.deadlock = true;
2352
2353 signaller = semaphore_waits_for(ring, &seqno);
2354 if (signaller == NULL || signaller->hangcheck.deadlock)
2355 return -1;
2356
2357 /* cursory check for an unkickable deadlock */
2358 ctl = I915_READ_CTL(signaller);
2359 if (ctl & RING_WAIT_SEMAPHORE && semaphore_passed(signaller) < 0)
2360 return -1;
2361
2362 return i915_seqno_passed(signaller->get_seqno(signaller, false), seqno);
2363 }
2364
2365 static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv)
2366 {
2367 struct intel_ring_buffer *ring;
2368 int i;
2369
2370 for_each_ring(ring, dev_priv, i)
2371 ring->hangcheck.deadlock = false;
2372 }
2373
2374 static enum intel_ring_hangcheck_action
2375 ring_stuck(struct intel_ring_buffer *ring, u32 acthd)
2376 {
2377 struct drm_device *dev = ring->dev;
2378 struct drm_i915_private *dev_priv = dev->dev_private;
2379 u32 tmp;
2380
2381 if (ring->hangcheck.acthd != acthd)
2382 return active;
2383
2384 if (IS_GEN2(dev))
2385 return hung;
2386
2387 /* Is the chip hanging on a WAIT_FOR_EVENT?
2388 * If so we can simply poke the RB_WAIT bit
2389 * and break the hang. This should work on
2390 * all but the second generation chipsets.
2391 */
2392 tmp = I915_READ_CTL(ring);
2393 if (tmp & RING_WAIT) {
2394 DRM_ERROR("Kicking stuck wait on %s\n",
2395 ring->name);
2396 I915_WRITE_CTL(ring, tmp);
2397 return kick;
2398 }
2399
2400 if (INTEL_INFO(dev)->gen >= 6 && tmp & RING_WAIT_SEMAPHORE) {
2401 switch (semaphore_passed(ring)) {
2402 default:
2403 return hung;
2404 case 1:
2405 DRM_ERROR("Kicking stuck semaphore on %s\n",
2406 ring->name);
2407 I915_WRITE_CTL(ring, tmp);
2408 return kick;
2409 case 0:
2410 return wait;
2411 }
2412 }
2413
2414 return hung;
2415 }
2416
2417 /**
2418 * This is called when the chip hasn't reported back with completed
2419 * batchbuffers in a long time. We keep track per ring seqno progress and
2420 * if there are no progress, hangcheck score for that ring is increased.
2421 * Further, acthd is inspected to see if the ring is stuck. On stuck case
2422 * we kick the ring. If we see no progress on three subsequent calls
2423 * we assume chip is wedged and try to fix it by resetting the chip.
2424 */
2425 void i915_hangcheck_elapsed(unsigned long data)
2426 {
2427 struct drm_device *dev = (struct drm_device *)data;
2428 drm_i915_private_t *dev_priv = dev->dev_private;
2429 struct intel_ring_buffer *ring;
2430 int i;
2431 int busy_count = 0, rings_hung = 0;
2432 bool stuck[I915_NUM_RINGS] = { 0 };
2433 #define BUSY 1
2434 #define KICK 5
2435 #define HUNG 20
2436 #define FIRE 30
2437
2438 if (!i915_enable_hangcheck)
2439 return;
2440
2441 for_each_ring(ring, dev_priv, i) {
2442 u32 seqno, acthd;
2443 bool busy = true;
2444
2445 semaphore_clear_deadlocks(dev_priv);
2446
2447 seqno = ring->get_seqno(ring, false);
2448 acthd = intel_ring_get_active_head(ring);
2449
2450 if (ring->hangcheck.seqno == seqno) {
2451 if (ring_idle(ring, seqno)) {
2452 if (waitqueue_active(&ring->irq_queue)) {
2453 /* Issue a wake-up to catch stuck h/w. */
2454 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
2455 ring->name);
2456 wake_up_all(&ring->irq_queue);
2457 ring->hangcheck.score += HUNG;
2458 } else
2459 busy = false;
2460 } else {
2461 int score;
2462
2463 /* We always increment the hangcheck score
2464 * if the ring is busy and still processing
2465 * the same request, so that no single request
2466 * can run indefinitely (such as a chain of
2467 * batches). The only time we do not increment
2468 * the hangcheck score on this ring, if this
2469 * ring is in a legitimate wait for another
2470 * ring. In that case the waiting ring is a
2471 * victim and we want to be sure we catch the
2472 * right culprit. Then every time we do kick
2473 * the ring, add a small increment to the
2474 * score so that we can catch a batch that is
2475 * being repeatedly kicked and so responsible
2476 * for stalling the machine.
2477 */
2478 ring->hangcheck.action = ring_stuck(ring,
2479 acthd);
2480
2481 switch (ring->hangcheck.action) {
2482 case wait:
2483 score = 0;
2484 break;
2485 case active:
2486 score = BUSY;
2487 break;
2488 case kick:
2489 score = KICK;
2490 break;
2491 case hung:
2492 score = HUNG;
2493 stuck[i] = true;
2494 break;
2495 }
2496 ring->hangcheck.score += score;
2497 }
2498 } else {
2499 /* Gradually reduce the count so that we catch DoS
2500 * attempts across multiple batches.
2501 */
2502 if (ring->hangcheck.score > 0)
2503 ring->hangcheck.score--;
2504 }
2505
2506 ring->hangcheck.seqno = seqno;
2507 ring->hangcheck.acthd = acthd;
2508 busy_count += busy;
2509 }
2510
2511 for_each_ring(ring, dev_priv, i) {
2512 if (ring->hangcheck.score > FIRE) {
2513 DRM_ERROR("%s on %s\n",
2514 stuck[i] ? "stuck" : "no progress",
2515 ring->name);
2516 rings_hung++;
2517 }
2518 }
2519
2520 if (rings_hung)
2521 return i915_handle_error(dev, true);
2522
2523 if (busy_count)
2524 /* Reset timer case chip hangs without another request
2525 * being added */
2526 mod_timer(&dev_priv->gpu_error.hangcheck_timer,
2527 round_jiffies_up(jiffies +
2528 DRM_I915_HANGCHECK_JIFFIES));
2529 }
2530
2531 static void ibx_irq_preinstall(struct drm_device *dev)
2532 {
2533 struct drm_i915_private *dev_priv = dev->dev_private;
2534
2535 if (HAS_PCH_NOP(dev))
2536 return;
2537
2538 /* south display irq */
2539 I915_WRITE(SDEIMR, 0xffffffff);
2540 /*
2541 * SDEIER is also touched by the interrupt handler to work around missed
2542 * PCH interrupts. Hence we can't update it after the interrupt handler
2543 * is enabled - instead we unconditionally enable all PCH interrupt
2544 * sources here, but then only unmask them as needed with SDEIMR.
2545 */
2546 I915_WRITE(SDEIER, 0xffffffff);
2547 POSTING_READ(SDEIER);
2548 }
2549
2550 /* drm_dma.h hooks
2551 */
2552 static void ironlake_irq_preinstall(struct drm_device *dev)
2553 {
2554 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2555
2556 atomic_set(&dev_priv->irq_received, 0);
2557
2558 I915_WRITE(HWSTAM, 0xeffe);
2559
2560 /* XXX hotplug from PCH */
2561
2562 I915_WRITE(DEIMR, 0xffffffff);
2563 I915_WRITE(DEIER, 0x0);
2564 POSTING_READ(DEIER);
2565
2566 /* and GT */
2567 I915_WRITE(GTIMR, 0xffffffff);
2568 I915_WRITE(GTIER, 0x0);
2569 POSTING_READ(GTIER);
2570
2571 ibx_irq_preinstall(dev);
2572 }
2573
2574 static void ivybridge_irq_preinstall(struct drm_device *dev)
2575 {
2576 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2577
2578 atomic_set(&dev_priv->irq_received, 0);
2579
2580 I915_WRITE(HWSTAM, 0xeffe);
2581
2582 /* XXX hotplug from PCH */
2583
2584 I915_WRITE(DEIMR, 0xffffffff);
2585 I915_WRITE(DEIER, 0x0);
2586 POSTING_READ(DEIER);
2587
2588 /* and GT */
2589 I915_WRITE(GTIMR, 0xffffffff);
2590 I915_WRITE(GTIER, 0x0);
2591 POSTING_READ(GTIER);
2592
2593 /* Power management */
2594 I915_WRITE(GEN6_PMIMR, 0xffffffff);
2595 I915_WRITE(GEN6_PMIER, 0x0);
2596 POSTING_READ(GEN6_PMIER);
2597
2598 ibx_irq_preinstall(dev);
2599 }
2600
2601 static void valleyview_irq_preinstall(struct drm_device *dev)
2602 {
2603 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2604 int pipe;
2605
2606 atomic_set(&dev_priv->irq_received, 0);
2607
2608 /* VLV magic */
2609 I915_WRITE(VLV_IMR, 0);
2610 I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
2611 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
2612 I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
2613
2614 /* and GT */
2615 I915_WRITE(GTIIR, I915_READ(GTIIR));
2616 I915_WRITE(GTIIR, I915_READ(GTIIR));
2617 I915_WRITE(GTIMR, 0xffffffff);
2618 I915_WRITE(GTIER, 0x0);
2619 POSTING_READ(GTIER);
2620
2621 I915_WRITE(DPINVGTT, 0xff);
2622
2623 I915_WRITE(PORT_HOTPLUG_EN, 0);
2624 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2625 for_each_pipe(pipe)
2626 I915_WRITE(PIPESTAT(pipe), 0xffff);
2627 I915_WRITE(VLV_IIR, 0xffffffff);
2628 I915_WRITE(VLV_IMR, 0xffffffff);
2629 I915_WRITE(VLV_IER, 0x0);
2630 POSTING_READ(VLV_IER);
2631 }
2632
2633 static void ibx_hpd_irq_setup(struct drm_device *dev)
2634 {
2635 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2636 struct drm_mode_config *mode_config = &dev->mode_config;
2637 struct intel_encoder *intel_encoder;
2638 u32 mask = ~I915_READ(SDEIMR);
2639 u32 hotplug;
2640
2641 if (HAS_PCH_IBX(dev)) {
2642 mask &= ~SDE_HOTPLUG_MASK;
2643 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
2644 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
2645 mask |= hpd_ibx[intel_encoder->hpd_pin];
2646 } else {
2647 mask &= ~SDE_HOTPLUG_MASK_CPT;
2648 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
2649 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
2650 mask |= hpd_cpt[intel_encoder->hpd_pin];
2651 }
2652
2653 I915_WRITE(SDEIMR, ~mask);
2654
2655 /*
2656 * Enable digital hotplug on the PCH, and configure the DP short pulse
2657 * duration to 2ms (which is the minimum in the Display Port spec)
2658 *
2659 * This register is the same on all known PCH chips.
2660 */
2661 hotplug = I915_READ(PCH_PORT_HOTPLUG);
2662 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
2663 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
2664 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
2665 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
2666 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
2667 }
2668
2669 static void ibx_irq_postinstall(struct drm_device *dev)
2670 {
2671 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2672 u32 mask;
2673
2674 if (HAS_PCH_NOP(dev))
2675 return;
2676
2677 if (HAS_PCH_IBX(dev)) {
2678 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_TRANSB_FIFO_UNDER |
2679 SDE_TRANSA_FIFO_UNDER | SDE_POISON;
2680 } else {
2681 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT | SDE_ERROR_CPT;
2682
2683 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
2684 }
2685
2686 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2687 I915_WRITE(SDEIMR, ~mask);
2688 }
2689
2690 static int ironlake_irq_postinstall(struct drm_device *dev)
2691 {
2692 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2693 /* enable kind of interrupts always enabled */
2694 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
2695 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
2696 DE_AUX_CHANNEL_A | DE_PIPEB_FIFO_UNDERRUN |
2697 DE_PIPEA_FIFO_UNDERRUN | DE_POISON;
2698 u32 gt_irqs;
2699
2700 dev_priv->irq_mask = ~display_mask;
2701
2702 /* should always can generate irq */
2703 I915_WRITE(DEIIR, I915_READ(DEIIR));
2704 I915_WRITE(DEIMR, dev_priv->irq_mask);
2705 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK);
2706 POSTING_READ(DEIER);
2707
2708 dev_priv->gt_irq_mask = ~0;
2709
2710 I915_WRITE(GTIIR, I915_READ(GTIIR));
2711 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
2712
2713 gt_irqs = GT_RENDER_USER_INTERRUPT;
2714
2715 if (IS_GEN6(dev))
2716 gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
2717 else
2718 gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT |
2719 ILK_BSD_USER_INTERRUPT;
2720
2721 I915_WRITE(GTIER, gt_irqs);
2722 POSTING_READ(GTIER);
2723
2724 ibx_irq_postinstall(dev);
2725
2726 if (IS_IRONLAKE_M(dev)) {
2727 /* Clear & enable PCU event interrupts */
2728 I915_WRITE(DEIIR, DE_PCU_EVENT);
2729 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
2730 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
2731 }
2732
2733 return 0;
2734 }
2735
2736 static int ivybridge_irq_postinstall(struct drm_device *dev)
2737 {
2738 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2739 /* enable kind of interrupts always enabled */
2740 u32 display_mask =
2741 DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | DE_PCH_EVENT_IVB |
2742 DE_PLANEC_FLIP_DONE_IVB |
2743 DE_PLANEB_FLIP_DONE_IVB |
2744 DE_PLANEA_FLIP_DONE_IVB |
2745 DE_AUX_CHANNEL_A_IVB |
2746 DE_ERR_INT_IVB;
2747 u32 pm_irqs = GEN6_PM_RPS_EVENTS;
2748 u32 gt_irqs;
2749
2750 dev_priv->irq_mask = ~display_mask;
2751
2752 /* should always can generate irq */
2753 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
2754 I915_WRITE(DEIIR, I915_READ(DEIIR));
2755 I915_WRITE(DEIMR, dev_priv->irq_mask);
2756 I915_WRITE(DEIER,
2757 display_mask |
2758 DE_PIPEC_VBLANK_IVB |
2759 DE_PIPEB_VBLANK_IVB |
2760 DE_PIPEA_VBLANK_IVB);
2761 POSTING_READ(DEIER);
2762
2763 dev_priv->gt_irq_mask = ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
2764
2765 I915_WRITE(GTIIR, I915_READ(GTIIR));
2766 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
2767
2768 gt_irqs = GT_RENDER_USER_INTERRUPT | GT_BSD_USER_INTERRUPT |
2769 GT_BLT_USER_INTERRUPT | GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
2770 I915_WRITE(GTIER, gt_irqs);
2771 POSTING_READ(GTIER);
2772
2773 I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
2774 if (HAS_VEBOX(dev))
2775 pm_irqs |= PM_VEBOX_USER_INTERRUPT |
2776 PM_VEBOX_CS_ERROR_INTERRUPT;
2777
2778 /* Our enable/disable rps functions may touch these registers so
2779 * make sure to set a known state for only the non-RPS bits.
2780 * The RMW is extra paranoia since this should be called after being set
2781 * to a known state in preinstall.
2782 * */
2783 I915_WRITE(GEN6_PMIMR,
2784 (I915_READ(GEN6_PMIMR) | ~GEN6_PM_RPS_EVENTS) & ~pm_irqs);
2785 I915_WRITE(GEN6_PMIER,
2786 (I915_READ(GEN6_PMIER) & GEN6_PM_RPS_EVENTS) | pm_irqs);
2787 POSTING_READ(GEN6_PMIER);
2788
2789 ibx_irq_postinstall(dev);
2790
2791 return 0;
2792 }
2793
2794 static int valleyview_irq_postinstall(struct drm_device *dev)
2795 {
2796 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2797 u32 gt_irqs;
2798 u32 enable_mask;
2799 u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV;
2800
2801 enable_mask = I915_DISPLAY_PORT_INTERRUPT;
2802 enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2803 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2804 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2805 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2806
2807 /*
2808 *Leave vblank interrupts masked initially. enable/disable will
2809 * toggle them based on usage.
2810 */
2811 dev_priv->irq_mask = (~enable_mask) |
2812 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2813 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2814
2815 I915_WRITE(PORT_HOTPLUG_EN, 0);
2816 POSTING_READ(PORT_HOTPLUG_EN);
2817
2818 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
2819 I915_WRITE(VLV_IER, enable_mask);
2820 I915_WRITE(VLV_IIR, 0xffffffff);
2821 I915_WRITE(PIPESTAT(0), 0xffff);
2822 I915_WRITE(PIPESTAT(1), 0xffff);
2823 POSTING_READ(VLV_IER);
2824
2825 i915_enable_pipestat(dev_priv, 0, pipestat_enable);
2826 i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
2827 i915_enable_pipestat(dev_priv, 1, pipestat_enable);
2828
2829 I915_WRITE(VLV_IIR, 0xffffffff);
2830 I915_WRITE(VLV_IIR, 0xffffffff);
2831
2832 I915_WRITE(GTIIR, I915_READ(GTIIR));
2833 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
2834
2835 gt_irqs = GT_RENDER_USER_INTERRUPT | GT_BSD_USER_INTERRUPT |
2836 GT_BLT_USER_INTERRUPT;
2837 I915_WRITE(GTIER, gt_irqs);
2838 POSTING_READ(GTIER);
2839
2840 /* ack & enable invalid PTE error interrupts */
2841 #if 0 /* FIXME: add support to irq handler for checking these bits */
2842 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
2843 I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
2844 #endif
2845
2846 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
2847
2848 return 0;
2849 }
2850
2851 static void valleyview_irq_uninstall(struct drm_device *dev)
2852 {
2853 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2854 int pipe;
2855
2856 if (!dev_priv)
2857 return;
2858
2859 del_timer_sync(&dev_priv->hotplug_reenable_timer);
2860
2861 for_each_pipe(pipe)
2862 I915_WRITE(PIPESTAT(pipe), 0xffff);
2863
2864 I915_WRITE(HWSTAM, 0xffffffff);
2865 I915_WRITE(PORT_HOTPLUG_EN, 0);
2866 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2867 for_each_pipe(pipe)
2868 I915_WRITE(PIPESTAT(pipe), 0xffff);
2869 I915_WRITE(VLV_IIR, 0xffffffff);
2870 I915_WRITE(VLV_IMR, 0xffffffff);
2871 I915_WRITE(VLV_IER, 0x0);
2872 POSTING_READ(VLV_IER);
2873 }
2874
2875 static void ironlake_irq_uninstall(struct drm_device *dev)
2876 {
2877 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2878
2879 if (!dev_priv)
2880 return;
2881
2882 del_timer_sync(&dev_priv->hotplug_reenable_timer);
2883
2884 I915_WRITE(HWSTAM, 0xffffffff);
2885
2886 I915_WRITE(DEIMR, 0xffffffff);
2887 I915_WRITE(DEIER, 0x0);
2888 I915_WRITE(DEIIR, I915_READ(DEIIR));
2889 if (IS_GEN7(dev))
2890 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
2891
2892 I915_WRITE(GTIMR, 0xffffffff);
2893 I915_WRITE(GTIER, 0x0);
2894 I915_WRITE(GTIIR, I915_READ(GTIIR));
2895
2896 if (HAS_PCH_NOP(dev))
2897 return;
2898
2899 I915_WRITE(SDEIMR, 0xffffffff);
2900 I915_WRITE(SDEIER, 0x0);
2901 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2902 if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev))
2903 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
2904 }
2905
2906 static void i8xx_irq_preinstall(struct drm_device * dev)
2907 {
2908 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2909 int pipe;
2910
2911 atomic_set(&dev_priv->irq_received, 0);
2912
2913 for_each_pipe(pipe)
2914 I915_WRITE(PIPESTAT(pipe), 0);
2915 I915_WRITE16(IMR, 0xffff);
2916 I915_WRITE16(IER, 0x0);
2917 POSTING_READ16(IER);
2918 }
2919
2920 static int i8xx_irq_postinstall(struct drm_device *dev)
2921 {
2922 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2923
2924 I915_WRITE16(EMR,
2925 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2926
2927 /* Unmask the interrupts that we always want on. */
2928 dev_priv->irq_mask =
2929 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2930 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2931 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2932 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2933 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2934 I915_WRITE16(IMR, dev_priv->irq_mask);
2935
2936 I915_WRITE16(IER,
2937 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2938 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2939 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2940 I915_USER_INTERRUPT);
2941 POSTING_READ16(IER);
2942
2943 return 0;
2944 }
2945
2946 /*
2947 * Returns true when a page flip has completed.
2948 */
2949 static bool i8xx_handle_vblank(struct drm_device *dev,
2950 int pipe, u16 iir)
2951 {
2952 drm_i915_private_t *dev_priv = dev->dev_private;
2953 u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(pipe);
2954
2955 if (!drm_handle_vblank(dev, pipe))
2956 return false;
2957
2958 if ((iir & flip_pending) == 0)
2959 return false;
2960
2961 intel_prepare_page_flip(dev, pipe);
2962
2963 /* We detect FlipDone by looking for the change in PendingFlip from '1'
2964 * to '0' on the following vblank, i.e. IIR has the Pendingflip
2965 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
2966 * the flip is completed (no longer pending). Since this doesn't raise
2967 * an interrupt per se, we watch for the change at vblank.
2968 */
2969 if (I915_READ16(ISR) & flip_pending)
2970 return false;
2971
2972 intel_finish_page_flip(dev, pipe);
2973
2974 return true;
2975 }
2976
2977 static irqreturn_t i8xx_irq_handler(int irq, void *arg)
2978 {
2979 struct drm_device *dev = (struct drm_device *) arg;
2980 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2981 u16 iir, new_iir;
2982 u32 pipe_stats[2];
2983 unsigned long irqflags;
2984 int irq_received;
2985 int pipe;
2986 u16 flip_mask =
2987 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2988 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2989
2990 atomic_inc(&dev_priv->irq_received);
2991
2992 iir = I915_READ16(IIR);
2993 if (iir == 0)
2994 return IRQ_NONE;
2995
2996 while (iir & ~flip_mask) {
2997 /* Can't rely on pipestat interrupt bit in iir as it might
2998 * have been cleared after the pipestat interrupt was received.
2999 * It doesn't set the bit in iir again, but it still produces
3000 * interrupts (for non-MSI).
3001 */
3002 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3003 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3004 i915_handle_error(dev, false);
3005
3006 for_each_pipe(pipe) {
3007 int reg = PIPESTAT(pipe);
3008 pipe_stats[pipe] = I915_READ(reg);
3009
3010 /*
3011 * Clear the PIPE*STAT regs before the IIR
3012 */
3013 if (pipe_stats[pipe] & 0x8000ffff) {
3014 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3015 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3016 pipe_name(pipe));
3017 I915_WRITE(reg, pipe_stats[pipe]);
3018 irq_received = 1;
3019 }
3020 }
3021 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3022
3023 I915_WRITE16(IIR, iir & ~flip_mask);
3024 new_iir = I915_READ16(IIR); /* Flush posted writes */
3025
3026 i915_update_dri1_breadcrumb(dev);
3027
3028 if (iir & I915_USER_INTERRUPT)
3029 notify_ring(dev, &dev_priv->ring[RCS]);
3030
3031 if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
3032 i8xx_handle_vblank(dev, 0, iir))
3033 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(0);
3034
3035 if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
3036 i8xx_handle_vblank(dev, 1, iir))
3037 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(1);
3038
3039 iir = new_iir;
3040 }
3041
3042 return IRQ_HANDLED;
3043 }
3044
3045 static void i8xx_irq_uninstall(struct drm_device * dev)
3046 {
3047 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3048 int pipe;
3049
3050 for_each_pipe(pipe) {
3051 /* Clear enable bits; then clear status bits */
3052 I915_WRITE(PIPESTAT(pipe), 0);
3053 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
3054 }
3055 I915_WRITE16(IMR, 0xffff);
3056 I915_WRITE16(IER, 0x0);
3057 I915_WRITE16(IIR, I915_READ16(IIR));
3058 }
3059
3060 static void i915_irq_preinstall(struct drm_device * dev)
3061 {
3062 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3063 int pipe;
3064
3065 atomic_set(&dev_priv->irq_received, 0);
3066
3067 if (I915_HAS_HOTPLUG(dev)) {
3068 I915_WRITE(PORT_HOTPLUG_EN, 0);
3069 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3070 }
3071
3072 I915_WRITE16(HWSTAM, 0xeffe);
3073 for_each_pipe(pipe)
3074 I915_WRITE(PIPESTAT(pipe), 0);
3075 I915_WRITE(IMR, 0xffffffff);
3076 I915_WRITE(IER, 0x0);
3077 POSTING_READ(IER);
3078 }
3079
3080 static int i915_irq_postinstall(struct drm_device *dev)
3081 {
3082 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3083 u32 enable_mask;
3084
3085 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
3086
3087 /* Unmask the interrupts that we always want on. */
3088 dev_priv->irq_mask =
3089 ~(I915_ASLE_INTERRUPT |
3090 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3091 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3092 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3093 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3094 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3095
3096 enable_mask =
3097 I915_ASLE_INTERRUPT |
3098 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3099 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3100 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
3101 I915_USER_INTERRUPT;
3102
3103 if (I915_HAS_HOTPLUG(dev)) {
3104 I915_WRITE(PORT_HOTPLUG_EN, 0);
3105 POSTING_READ(PORT_HOTPLUG_EN);
3106
3107 /* Enable in IER... */
3108 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
3109 /* and unmask in IMR */
3110 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
3111 }
3112
3113 I915_WRITE(IMR, dev_priv->irq_mask);
3114 I915_WRITE(IER, enable_mask);
3115 POSTING_READ(IER);
3116
3117 i915_enable_asle_pipestat(dev);
3118
3119 return 0;
3120 }
3121
3122 /*
3123 * Returns true when a page flip has completed.
3124 */
3125 static bool i915_handle_vblank(struct drm_device *dev,
3126 int plane, int pipe, u32 iir)
3127 {
3128 drm_i915_private_t *dev_priv = dev->dev_private;
3129 u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
3130
3131 if (!drm_handle_vblank(dev, pipe))
3132 return false;
3133
3134 if ((iir & flip_pending) == 0)
3135 return false;
3136
3137 intel_prepare_page_flip(dev, plane);
3138
3139 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3140 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3141 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3142 * the flip is completed (no longer pending). Since this doesn't raise
3143 * an interrupt per se, we watch for the change at vblank.
3144 */
3145 if (I915_READ(ISR) & flip_pending)
3146 return false;
3147
3148 intel_finish_page_flip(dev, pipe);
3149
3150 return true;
3151 }
3152
3153 static irqreturn_t i915_irq_handler(int irq, void *arg)
3154 {
3155 struct drm_device *dev = (struct drm_device *) arg;
3156 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3157 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
3158 unsigned long irqflags;
3159 u32 flip_mask =
3160 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3161 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3162 int pipe, ret = IRQ_NONE;
3163
3164 atomic_inc(&dev_priv->irq_received);
3165
3166 iir = I915_READ(IIR);
3167 do {
3168 bool irq_received = (iir & ~flip_mask) != 0;
3169 bool blc_event = false;
3170
3171 /* Can't rely on pipestat interrupt bit in iir as it might
3172 * have been cleared after the pipestat interrupt was received.
3173 * It doesn't set the bit in iir again, but it still produces
3174 * interrupts (for non-MSI).
3175 */
3176 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3177 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3178 i915_handle_error(dev, false);
3179
3180 for_each_pipe(pipe) {
3181 int reg = PIPESTAT(pipe);
3182 pipe_stats[pipe] = I915_READ(reg);
3183
3184 /* Clear the PIPE*STAT regs before the IIR */
3185 if (pipe_stats[pipe] & 0x8000ffff) {
3186 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3187 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3188 pipe_name(pipe));
3189 I915_WRITE(reg, pipe_stats[pipe]);
3190 irq_received = true;
3191 }
3192 }
3193 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3194
3195 if (!irq_received)
3196 break;
3197
3198 /* Consume port. Then clear IIR or we'll miss events */
3199 if ((I915_HAS_HOTPLUG(dev)) &&
3200 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
3201 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3202 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
3203
3204 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
3205 hotplug_status);
3206 if (hotplug_trigger) {
3207 if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_status_i915))
3208 i915_hpd_irq_setup(dev);
3209 queue_work(dev_priv->wq,
3210 &dev_priv->hotplug_work);
3211 }
3212 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
3213 POSTING_READ(PORT_HOTPLUG_STAT);
3214 }
3215
3216 I915_WRITE(IIR, iir & ~flip_mask);
3217 new_iir = I915_READ(IIR); /* Flush posted writes */
3218
3219 if (iir & I915_USER_INTERRUPT)
3220 notify_ring(dev, &dev_priv->ring[RCS]);
3221
3222 for_each_pipe(pipe) {
3223 int plane = pipe;
3224 if (IS_MOBILE(dev))
3225 plane = !plane;
3226
3227 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
3228 i915_handle_vblank(dev, plane, pipe, iir))
3229 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
3230
3231 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
3232 blc_event = true;
3233 }
3234
3235 if (blc_event || (iir & I915_ASLE_INTERRUPT))
3236 intel_opregion_asle_intr(dev);
3237
3238 /* With MSI, interrupts are only generated when iir
3239 * transitions from zero to nonzero. If another bit got
3240 * set while we were handling the existing iir bits, then
3241 * we would never get another interrupt.
3242 *
3243 * This is fine on non-MSI as well, as if we hit this path
3244 * we avoid exiting the interrupt handler only to generate
3245 * another one.
3246 *
3247 * Note that for MSI this could cause a stray interrupt report
3248 * if an interrupt landed in the time between writing IIR and
3249 * the posting read. This should be rare enough to never
3250 * trigger the 99% of 100,000 interrupts test for disabling
3251 * stray interrupts.
3252 */
3253 ret = IRQ_HANDLED;
3254 iir = new_iir;
3255 } while (iir & ~flip_mask);
3256
3257 i915_update_dri1_breadcrumb(dev);
3258
3259 return ret;
3260 }
3261
3262 static void i915_irq_uninstall(struct drm_device * dev)
3263 {
3264 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3265 int pipe;
3266
3267 del_timer_sync(&dev_priv->hotplug_reenable_timer);
3268
3269 if (I915_HAS_HOTPLUG(dev)) {
3270 I915_WRITE(PORT_HOTPLUG_EN, 0);
3271 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3272 }
3273
3274 I915_WRITE16(HWSTAM, 0xffff);
3275 for_each_pipe(pipe) {
3276 /* Clear enable bits; then clear status bits */
3277 I915_WRITE(PIPESTAT(pipe), 0);
3278 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
3279 }
3280 I915_WRITE(IMR, 0xffffffff);
3281 I915_WRITE(IER, 0x0);
3282
3283 I915_WRITE(IIR, I915_READ(IIR));
3284 }
3285
3286 static void i965_irq_preinstall(struct drm_device * dev)
3287 {
3288 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3289 int pipe;
3290
3291 atomic_set(&dev_priv->irq_received, 0);
3292
3293 I915_WRITE(PORT_HOTPLUG_EN, 0);
3294 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3295
3296 I915_WRITE(HWSTAM, 0xeffe);
3297 for_each_pipe(pipe)
3298 I915_WRITE(PIPESTAT(pipe), 0);
3299 I915_WRITE(IMR, 0xffffffff);
3300 I915_WRITE(IER, 0x0);
3301 POSTING_READ(IER);
3302 }
3303
3304 static int i965_irq_postinstall(struct drm_device *dev)
3305 {
3306 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3307 u32 enable_mask;
3308 u32 error_mask;
3309
3310 /* Unmask the interrupts that we always want on. */
3311 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
3312 I915_DISPLAY_PORT_INTERRUPT |
3313 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3314 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3315 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3316 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3317 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3318
3319 enable_mask = ~dev_priv->irq_mask;
3320 enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3321 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
3322 enable_mask |= I915_USER_INTERRUPT;
3323
3324 if (IS_G4X(dev))
3325 enable_mask |= I915_BSD_USER_INTERRUPT;
3326
3327 i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
3328
3329 /*
3330 * Enable some error detection, note the instruction error mask
3331 * bit is reserved, so we leave it masked.
3332 */
3333 if (IS_G4X(dev)) {
3334 error_mask = ~(GM45_ERROR_PAGE_TABLE |
3335 GM45_ERROR_MEM_PRIV |
3336 GM45_ERROR_CP_PRIV |
3337 I915_ERROR_MEMORY_REFRESH);
3338 } else {
3339 error_mask = ~(I915_ERROR_PAGE_TABLE |
3340 I915_ERROR_MEMORY_REFRESH);
3341 }
3342 I915_WRITE(EMR, error_mask);
3343
3344 I915_WRITE(IMR, dev_priv->irq_mask);
3345 I915_WRITE(IER, enable_mask);
3346 POSTING_READ(IER);
3347
3348 I915_WRITE(PORT_HOTPLUG_EN, 0);
3349 POSTING_READ(PORT_HOTPLUG_EN);
3350
3351 i915_enable_asle_pipestat(dev);
3352
3353 return 0;
3354 }
3355
3356 static void i915_hpd_irq_setup(struct drm_device *dev)
3357 {
3358 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3359 struct drm_mode_config *mode_config = &dev->mode_config;
3360 struct intel_encoder *intel_encoder;
3361 u32 hotplug_en;
3362
3363 if (I915_HAS_HOTPLUG(dev)) {
3364 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
3365 hotplug_en &= ~HOTPLUG_INT_EN_MASK;
3366 /* Note HDMI and DP share hotplug bits */
3367 /* enable bits are the same for all generations */
3368 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
3369 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
3370 hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin];
3371 /* Programming the CRT detection parameters tends
3372 to generate a spurious hotplug event about three
3373 seconds later. So just do it once.
3374 */
3375 if (IS_G4X(dev))
3376 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
3377 hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK;
3378 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
3379
3380 /* Ignore TV since it's buggy */
3381 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
3382 }
3383 }
3384
3385 static irqreturn_t i965_irq_handler(int irq, void *arg)
3386 {
3387 struct drm_device *dev = (struct drm_device *) arg;
3388 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3389 u32 iir, new_iir;
3390 u32 pipe_stats[I915_MAX_PIPES];
3391 unsigned long irqflags;
3392 int irq_received;
3393 int ret = IRQ_NONE, pipe;
3394 u32 flip_mask =
3395 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3396 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3397
3398 atomic_inc(&dev_priv->irq_received);
3399
3400 iir = I915_READ(IIR);
3401
3402 for (;;) {
3403 bool blc_event = false;
3404
3405 irq_received = (iir & ~flip_mask) != 0;
3406
3407 /* Can't rely on pipestat interrupt bit in iir as it might
3408 * have been cleared after the pipestat interrupt was received.
3409 * It doesn't set the bit in iir again, but it still produces
3410 * interrupts (for non-MSI).
3411 */
3412 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3413 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3414 i915_handle_error(dev, false);
3415
3416 for_each_pipe(pipe) {
3417 int reg = PIPESTAT(pipe);
3418 pipe_stats[pipe] = I915_READ(reg);
3419
3420 /*
3421 * Clear the PIPE*STAT regs before the IIR
3422 */
3423 if (pipe_stats[pipe] & 0x8000ffff) {
3424 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3425 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3426 pipe_name(pipe));
3427 I915_WRITE(reg, pipe_stats[pipe]);
3428 irq_received = 1;
3429 }
3430 }
3431 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3432
3433 if (!irq_received)
3434 break;
3435
3436 ret = IRQ_HANDLED;
3437
3438 /* Consume port. Then clear IIR or we'll miss events */
3439 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
3440 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3441 u32 hotplug_trigger = hotplug_status & (IS_G4X(dev) ?
3442 HOTPLUG_INT_STATUS_G4X :
3443 HOTPLUG_INT_STATUS_I915);
3444
3445 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
3446 hotplug_status);
3447 if (hotplug_trigger) {
3448 if (hotplug_irq_storm_detect(dev, hotplug_trigger,
3449 IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i915))
3450 i915_hpd_irq_setup(dev);
3451 queue_work(dev_priv->wq,
3452 &dev_priv->hotplug_work);
3453 }
3454 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
3455 I915_READ(PORT_HOTPLUG_STAT);
3456 }
3457
3458 I915_WRITE(IIR, iir & ~flip_mask);
3459 new_iir = I915_READ(IIR); /* Flush posted writes */
3460
3461 if (iir & I915_USER_INTERRUPT)
3462 notify_ring(dev, &dev_priv->ring[RCS]);
3463 if (iir & I915_BSD_USER_INTERRUPT)
3464 notify_ring(dev, &dev_priv->ring[VCS]);
3465
3466 for_each_pipe(pipe) {
3467 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
3468 i915_handle_vblank(dev, pipe, pipe, iir))
3469 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
3470
3471 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
3472 blc_event = true;
3473 }
3474
3475
3476 if (blc_event || (iir & I915_ASLE_INTERRUPT))
3477 intel_opregion_asle_intr(dev);
3478
3479 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
3480 gmbus_irq_handler(dev);
3481
3482 /* With MSI, interrupts are only generated when iir
3483 * transitions from zero to nonzero. If another bit got
3484 * set while we were handling the existing iir bits, then
3485 * we would never get another interrupt.
3486 *
3487 * This is fine on non-MSI as well, as if we hit this path
3488 * we avoid exiting the interrupt handler only to generate
3489 * another one.
3490 *
3491 * Note that for MSI this could cause a stray interrupt report
3492 * if an interrupt landed in the time between writing IIR and
3493 * the posting read. This should be rare enough to never
3494 * trigger the 99% of 100,000 interrupts test for disabling
3495 * stray interrupts.
3496 */
3497 iir = new_iir;
3498 }
3499
3500 i915_update_dri1_breadcrumb(dev);
3501
3502 return ret;
3503 }
3504
3505 static void i965_irq_uninstall(struct drm_device * dev)
3506 {
3507 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3508 int pipe;
3509
3510 if (!dev_priv)
3511 return;
3512
3513 del_timer_sync(&dev_priv->hotplug_reenable_timer);
3514
3515 I915_WRITE(PORT_HOTPLUG_EN, 0);
3516 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3517
3518 I915_WRITE(HWSTAM, 0xffffffff);
3519 for_each_pipe(pipe)
3520 I915_WRITE(PIPESTAT(pipe), 0);
3521 I915_WRITE(IMR, 0xffffffff);
3522 I915_WRITE(IER, 0x0);
3523
3524 for_each_pipe(pipe)
3525 I915_WRITE(PIPESTAT(pipe),
3526 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
3527 I915_WRITE(IIR, I915_READ(IIR));
3528 }
3529
3530 static void i915_reenable_hotplug_timer_func(unsigned long data)
3531 {
3532 drm_i915_private_t *dev_priv = (drm_i915_private_t *)data;
3533 struct drm_device *dev = dev_priv->dev;
3534 struct drm_mode_config *mode_config = &dev->mode_config;
3535 unsigned long irqflags;
3536 int i;
3537
3538 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3539 for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) {
3540 struct drm_connector *connector;
3541
3542 if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED)
3543 continue;
3544
3545 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
3546
3547 list_for_each_entry(connector, &mode_config->connector_list, head) {
3548 struct intel_connector *intel_connector = to_intel_connector(connector);
3549
3550 if (intel_connector->encoder->hpd_pin == i) {
3551 if (connector->polled != intel_connector->polled)
3552 DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
3553 drm_get_connector_name(connector));
3554 connector->polled = intel_connector->polled;
3555 if (!connector->polled)
3556 connector->polled = DRM_CONNECTOR_POLL_HPD;
3557 }
3558 }
3559 }
3560 if (dev_priv->display.hpd_irq_setup)
3561 dev_priv->display.hpd_irq_setup(dev);
3562 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3563 }
3564
3565 void intel_irq_init(struct drm_device *dev)
3566 {
3567 struct drm_i915_private *dev_priv = dev->dev_private;
3568
3569 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
3570 INIT_WORK(&dev_priv->gpu_error.work, i915_error_work_func);
3571 INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
3572 INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
3573
3574 setup_timer(&dev_priv->gpu_error.hangcheck_timer,
3575 i915_hangcheck_elapsed,
3576 (unsigned long) dev);
3577 setup_timer(&dev_priv->hotplug_reenable_timer, i915_reenable_hotplug_timer_func,
3578 (unsigned long) dev_priv);
3579
3580 pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
3581
3582 dev->driver->get_vblank_counter = i915_get_vblank_counter;
3583 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
3584 if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
3585 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
3586 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
3587 }
3588
3589 if (drm_core_check_feature(dev, DRIVER_MODESET))
3590 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
3591 else
3592 dev->driver->get_vblank_timestamp = NULL;
3593 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
3594
3595 if (IS_VALLEYVIEW(dev)) {
3596 dev->driver->irq_handler = valleyview_irq_handler;
3597 dev->driver->irq_preinstall = valleyview_irq_preinstall;
3598 dev->driver->irq_postinstall = valleyview_irq_postinstall;
3599 dev->driver->irq_uninstall = valleyview_irq_uninstall;
3600 dev->driver->enable_vblank = valleyview_enable_vblank;
3601 dev->driver->disable_vblank = valleyview_disable_vblank;
3602 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3603 } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
3604 /* Share uninstall handlers with ILK/SNB */
3605 dev->driver->irq_handler = ivybridge_irq_handler;
3606 dev->driver->irq_preinstall = ivybridge_irq_preinstall;
3607 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
3608 dev->driver->irq_uninstall = ironlake_irq_uninstall;
3609 dev->driver->enable_vblank = ivybridge_enable_vblank;
3610 dev->driver->disable_vblank = ivybridge_disable_vblank;
3611 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
3612 } else if (HAS_PCH_SPLIT(dev)) {
3613 dev->driver->irq_handler = ironlake_irq_handler;
3614 dev->driver->irq_preinstall = ironlake_irq_preinstall;
3615 dev->driver->irq_postinstall = ironlake_irq_postinstall;
3616 dev->driver->irq_uninstall = ironlake_irq_uninstall;
3617 dev->driver->enable_vblank = ironlake_enable_vblank;
3618 dev->driver->disable_vblank = ironlake_disable_vblank;
3619 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
3620 } else {
3621 if (INTEL_INFO(dev)->gen == 2) {
3622 dev->driver->irq_preinstall = i8xx_irq_preinstall;
3623 dev->driver->irq_postinstall = i8xx_irq_postinstall;
3624 dev->driver->irq_handler = i8xx_irq_handler;
3625 dev->driver->irq_uninstall = i8xx_irq_uninstall;
3626 } else if (INTEL_INFO(dev)->gen == 3) {
3627 dev->driver->irq_preinstall = i915_irq_preinstall;
3628 dev->driver->irq_postinstall = i915_irq_postinstall;
3629 dev->driver->irq_uninstall = i915_irq_uninstall;
3630 dev->driver->irq_handler = i915_irq_handler;
3631 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3632 } else {
3633 dev->driver->irq_preinstall = i965_irq_preinstall;
3634 dev->driver->irq_postinstall = i965_irq_postinstall;
3635 dev->driver->irq_uninstall = i965_irq_uninstall;
3636 dev->driver->irq_handler = i965_irq_handler;
3637 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3638 }
3639 dev->driver->enable_vblank = i915_enable_vblank;
3640 dev->driver->disable_vblank = i915_disable_vblank;
3641 }
3642 }
3643
3644 void intel_hpd_init(struct drm_device *dev)
3645 {
3646 struct drm_i915_private *dev_priv = dev->dev_private;
3647 struct drm_mode_config *mode_config = &dev->mode_config;
3648 struct drm_connector *connector;
3649 int i;
3650
3651 for (i = 1; i < HPD_NUM_PINS; i++) {
3652 dev_priv->hpd_stats[i].hpd_cnt = 0;
3653 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
3654 }
3655 list_for_each_entry(connector, &mode_config->connector_list, head) {
3656 struct intel_connector *intel_connector = to_intel_connector(connector);
3657 connector->polled = intel_connector->polled;
3658 if (!connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE)
3659 connector->polled = DRM_CONNECTOR_POLL_HPD;
3660 }
3661 if (dev_priv->display.hpd_irq_setup)
3662 dev_priv->display.hpd_irq_setup(dev);
3663 }
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