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[deliverable/linux.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 "drmP.h"
34 #include "drm.h"
35 #include "i915_drm.h"
36 #include "i915_drv.h"
37 #include "i915_trace.h"
38 #include "intel_drv.h"
39
40 /* For display hotplug interrupt */
41 static void
42 ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
43 {
44 if ((dev_priv->irq_mask & mask) != 0) {
45 dev_priv->irq_mask &= ~mask;
46 I915_WRITE(DEIMR, dev_priv->irq_mask);
47 POSTING_READ(DEIMR);
48 }
49 }
50
51 static inline void
52 ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
53 {
54 if ((dev_priv->irq_mask & mask) != mask) {
55 dev_priv->irq_mask |= mask;
56 I915_WRITE(DEIMR, dev_priv->irq_mask);
57 POSTING_READ(DEIMR);
58 }
59 }
60
61 void
62 i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
63 {
64 if ((dev_priv->pipestat[pipe] & mask) != mask) {
65 u32 reg = PIPESTAT(pipe);
66
67 dev_priv->pipestat[pipe] |= mask;
68 /* Enable the interrupt, clear any pending status */
69 I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16));
70 POSTING_READ(reg);
71 }
72 }
73
74 void
75 i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
76 {
77 if ((dev_priv->pipestat[pipe] & mask) != 0) {
78 u32 reg = PIPESTAT(pipe);
79
80 dev_priv->pipestat[pipe] &= ~mask;
81 I915_WRITE(reg, dev_priv->pipestat[pipe]);
82 POSTING_READ(reg);
83 }
84 }
85
86 /**
87 * intel_enable_asle - enable ASLE interrupt for OpRegion
88 */
89 void intel_enable_asle(struct drm_device *dev)
90 {
91 drm_i915_private_t *dev_priv = dev->dev_private;
92 unsigned long irqflags;
93
94 /* FIXME: opregion/asle for VLV */
95 if (IS_VALLEYVIEW(dev))
96 return;
97
98 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
99
100 if (HAS_PCH_SPLIT(dev))
101 ironlake_enable_display_irq(dev_priv, DE_GSE);
102 else {
103 i915_enable_pipestat(dev_priv, 1,
104 PIPE_LEGACY_BLC_EVENT_ENABLE);
105 if (INTEL_INFO(dev)->gen >= 4)
106 i915_enable_pipestat(dev_priv, 0,
107 PIPE_LEGACY_BLC_EVENT_ENABLE);
108 }
109
110 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
111 }
112
113 /**
114 * i915_pipe_enabled - check if a pipe is enabled
115 * @dev: DRM device
116 * @pipe: pipe to check
117 *
118 * Reading certain registers when the pipe is disabled can hang the chip.
119 * Use this routine to make sure the PLL is running and the pipe is active
120 * before reading such registers if unsure.
121 */
122 static int
123 i915_pipe_enabled(struct drm_device *dev, int pipe)
124 {
125 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
126 return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
127 }
128
129 /* Called from drm generic code, passed a 'crtc', which
130 * we use as a pipe index
131 */
132 static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
133 {
134 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
135 unsigned long high_frame;
136 unsigned long low_frame;
137 u32 high1, high2, low;
138
139 if (!i915_pipe_enabled(dev, pipe)) {
140 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
141 "pipe %c\n", pipe_name(pipe));
142 return 0;
143 }
144
145 high_frame = PIPEFRAME(pipe);
146 low_frame = PIPEFRAMEPIXEL(pipe);
147
148 /*
149 * High & low register fields aren't synchronized, so make sure
150 * we get a low value that's stable across two reads of the high
151 * register.
152 */
153 do {
154 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
155 low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
156 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
157 } while (high1 != high2);
158
159 high1 >>= PIPE_FRAME_HIGH_SHIFT;
160 low >>= PIPE_FRAME_LOW_SHIFT;
161 return (high1 << 8) | low;
162 }
163
164 static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
165 {
166 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
167 int reg = PIPE_FRMCOUNT_GM45(pipe);
168
169 if (!i915_pipe_enabled(dev, pipe)) {
170 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
171 "pipe %c\n", pipe_name(pipe));
172 return 0;
173 }
174
175 return I915_READ(reg);
176 }
177
178 static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
179 int *vpos, int *hpos)
180 {
181 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
182 u32 vbl = 0, position = 0;
183 int vbl_start, vbl_end, htotal, vtotal;
184 bool in_vbl = true;
185 int ret = 0;
186
187 if (!i915_pipe_enabled(dev, pipe)) {
188 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
189 "pipe %c\n", pipe_name(pipe));
190 return 0;
191 }
192
193 /* Get vtotal. */
194 vtotal = 1 + ((I915_READ(VTOTAL(pipe)) >> 16) & 0x1fff);
195
196 if (INTEL_INFO(dev)->gen >= 4) {
197 /* No obvious pixelcount register. Only query vertical
198 * scanout position from Display scan line register.
199 */
200 position = I915_READ(PIPEDSL(pipe));
201
202 /* Decode into vertical scanout position. Don't have
203 * horizontal scanout position.
204 */
205 *vpos = position & 0x1fff;
206 *hpos = 0;
207 } else {
208 /* Have access to pixelcount since start of frame.
209 * We can split this into vertical and horizontal
210 * scanout position.
211 */
212 position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
213
214 htotal = 1 + ((I915_READ(HTOTAL(pipe)) >> 16) & 0x1fff);
215 *vpos = position / htotal;
216 *hpos = position - (*vpos * htotal);
217 }
218
219 /* Query vblank area. */
220 vbl = I915_READ(VBLANK(pipe));
221
222 /* Test position against vblank region. */
223 vbl_start = vbl & 0x1fff;
224 vbl_end = (vbl >> 16) & 0x1fff;
225
226 if ((*vpos < vbl_start) || (*vpos > vbl_end))
227 in_vbl = false;
228
229 /* Inside "upper part" of vblank area? Apply corrective offset: */
230 if (in_vbl && (*vpos >= vbl_start))
231 *vpos = *vpos - vtotal;
232
233 /* Readouts valid? */
234 if (vbl > 0)
235 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
236
237 /* In vblank? */
238 if (in_vbl)
239 ret |= DRM_SCANOUTPOS_INVBL;
240
241 return ret;
242 }
243
244 static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
245 int *max_error,
246 struct timeval *vblank_time,
247 unsigned flags)
248 {
249 struct drm_i915_private *dev_priv = dev->dev_private;
250 struct drm_crtc *crtc;
251
252 if (pipe < 0 || pipe >= dev_priv->num_pipe) {
253 DRM_ERROR("Invalid crtc %d\n", pipe);
254 return -EINVAL;
255 }
256
257 /* Get drm_crtc to timestamp: */
258 crtc = intel_get_crtc_for_pipe(dev, pipe);
259 if (crtc == NULL) {
260 DRM_ERROR("Invalid crtc %d\n", pipe);
261 return -EINVAL;
262 }
263
264 if (!crtc->enabled) {
265 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
266 return -EBUSY;
267 }
268
269 /* Helper routine in DRM core does all the work: */
270 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
271 vblank_time, flags,
272 crtc);
273 }
274
275 /*
276 * Handle hotplug events outside the interrupt handler proper.
277 */
278 static void i915_hotplug_work_func(struct work_struct *work)
279 {
280 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
281 hotplug_work);
282 struct drm_device *dev = dev_priv->dev;
283 struct drm_mode_config *mode_config = &dev->mode_config;
284 struct intel_encoder *encoder;
285
286 mutex_lock(&mode_config->mutex);
287 DRM_DEBUG_KMS("running encoder hotplug functions\n");
288
289 list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
290 if (encoder->hot_plug)
291 encoder->hot_plug(encoder);
292
293 mutex_unlock(&mode_config->mutex);
294
295 /* Just fire off a uevent and let userspace tell us what to do */
296 drm_helper_hpd_irq_event(dev);
297 }
298
299 /* defined intel_pm.c */
300 extern spinlock_t mchdev_lock;
301
302 static void ironlake_handle_rps_change(struct drm_device *dev)
303 {
304 drm_i915_private_t *dev_priv = dev->dev_private;
305 u32 busy_up, busy_down, max_avg, min_avg;
306 u8 new_delay;
307 unsigned long flags;
308
309 spin_lock_irqsave(&mchdev_lock, flags);
310
311 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
312
313 new_delay = dev_priv->ips.cur_delay;
314
315 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
316 busy_up = I915_READ(RCPREVBSYTUPAVG);
317 busy_down = I915_READ(RCPREVBSYTDNAVG);
318 max_avg = I915_READ(RCBMAXAVG);
319 min_avg = I915_READ(RCBMINAVG);
320
321 /* Handle RCS change request from hw */
322 if (busy_up > max_avg) {
323 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
324 new_delay = dev_priv->ips.cur_delay - 1;
325 if (new_delay < dev_priv->ips.max_delay)
326 new_delay = dev_priv->ips.max_delay;
327 } else if (busy_down < min_avg) {
328 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
329 new_delay = dev_priv->ips.cur_delay + 1;
330 if (new_delay > dev_priv->ips.min_delay)
331 new_delay = dev_priv->ips.min_delay;
332 }
333
334 if (ironlake_set_drps(dev, new_delay))
335 dev_priv->ips.cur_delay = new_delay;
336
337 spin_unlock_irqrestore(&mchdev_lock, flags);
338
339 return;
340 }
341
342 static void notify_ring(struct drm_device *dev,
343 struct intel_ring_buffer *ring)
344 {
345 struct drm_i915_private *dev_priv = dev->dev_private;
346
347 if (ring->obj == NULL)
348 return;
349
350 trace_i915_gem_request_complete(ring, ring->get_seqno(ring, false));
351
352 wake_up_all(&ring->irq_queue);
353 if (i915_enable_hangcheck) {
354 dev_priv->hangcheck_count = 0;
355 mod_timer(&dev_priv->hangcheck_timer,
356 jiffies +
357 msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
358 }
359 }
360
361 static void gen6_pm_rps_work(struct work_struct *work)
362 {
363 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
364 rps.work);
365 u32 pm_iir, pm_imr;
366 u8 new_delay;
367
368 spin_lock_irq(&dev_priv->rps.lock);
369 pm_iir = dev_priv->rps.pm_iir;
370 dev_priv->rps.pm_iir = 0;
371 pm_imr = I915_READ(GEN6_PMIMR);
372 I915_WRITE(GEN6_PMIMR, 0);
373 spin_unlock_irq(&dev_priv->rps.lock);
374
375 if ((pm_iir & GEN6_PM_DEFERRED_EVENTS) == 0)
376 return;
377
378 mutex_lock(&dev_priv->dev->struct_mutex);
379
380 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD)
381 new_delay = dev_priv->rps.cur_delay + 1;
382 else
383 new_delay = dev_priv->rps.cur_delay - 1;
384
385 gen6_set_rps(dev_priv->dev, new_delay);
386
387 mutex_unlock(&dev_priv->dev->struct_mutex);
388 }
389
390
391 /**
392 * ivybridge_parity_work - Workqueue called when a parity error interrupt
393 * occurred.
394 * @work: workqueue struct
395 *
396 * Doesn't actually do anything except notify userspace. As a consequence of
397 * this event, userspace should try to remap the bad rows since statistically
398 * it is likely the same row is more likely to go bad again.
399 */
400 static void ivybridge_parity_work(struct work_struct *work)
401 {
402 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
403 parity_error_work);
404 u32 error_status, row, bank, subbank;
405 char *parity_event[5];
406 uint32_t misccpctl;
407 unsigned long flags;
408
409 /* We must turn off DOP level clock gating to access the L3 registers.
410 * In order to prevent a get/put style interface, acquire struct mutex
411 * any time we access those registers.
412 */
413 mutex_lock(&dev_priv->dev->struct_mutex);
414
415 misccpctl = I915_READ(GEN7_MISCCPCTL);
416 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
417 POSTING_READ(GEN7_MISCCPCTL);
418
419 error_status = I915_READ(GEN7_L3CDERRST1);
420 row = GEN7_PARITY_ERROR_ROW(error_status);
421 bank = GEN7_PARITY_ERROR_BANK(error_status);
422 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
423
424 I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID |
425 GEN7_L3CDERRST1_ENABLE);
426 POSTING_READ(GEN7_L3CDERRST1);
427
428 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
429
430 spin_lock_irqsave(&dev_priv->irq_lock, flags);
431 dev_priv->gt_irq_mask &= ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
432 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
433 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
434
435 mutex_unlock(&dev_priv->dev->struct_mutex);
436
437 parity_event[0] = "L3_PARITY_ERROR=1";
438 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
439 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
440 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
441 parity_event[4] = NULL;
442
443 kobject_uevent_env(&dev_priv->dev->primary->kdev.kobj,
444 KOBJ_CHANGE, parity_event);
445
446 DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
447 row, bank, subbank);
448
449 kfree(parity_event[3]);
450 kfree(parity_event[2]);
451 kfree(parity_event[1]);
452 }
453
454 static void ivybridge_handle_parity_error(struct drm_device *dev)
455 {
456 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
457 unsigned long flags;
458
459 if (!HAS_L3_GPU_CACHE(dev))
460 return;
461
462 spin_lock_irqsave(&dev_priv->irq_lock, flags);
463 dev_priv->gt_irq_mask |= GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
464 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
465 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
466
467 queue_work(dev_priv->wq, &dev_priv->parity_error_work);
468 }
469
470 static void snb_gt_irq_handler(struct drm_device *dev,
471 struct drm_i915_private *dev_priv,
472 u32 gt_iir)
473 {
474
475 if (gt_iir & (GEN6_RENDER_USER_INTERRUPT |
476 GEN6_RENDER_PIPE_CONTROL_NOTIFY_INTERRUPT))
477 notify_ring(dev, &dev_priv->ring[RCS]);
478 if (gt_iir & GEN6_BSD_USER_INTERRUPT)
479 notify_ring(dev, &dev_priv->ring[VCS]);
480 if (gt_iir & GEN6_BLITTER_USER_INTERRUPT)
481 notify_ring(dev, &dev_priv->ring[BCS]);
482
483 if (gt_iir & (GT_GEN6_BLT_CS_ERROR_INTERRUPT |
484 GT_GEN6_BSD_CS_ERROR_INTERRUPT |
485 GT_RENDER_CS_ERROR_INTERRUPT)) {
486 DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
487 i915_handle_error(dev, false);
488 }
489
490 if (gt_iir & GT_GEN7_L3_PARITY_ERROR_INTERRUPT)
491 ivybridge_handle_parity_error(dev);
492 }
493
494 static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
495 u32 pm_iir)
496 {
497 unsigned long flags;
498
499 /*
500 * IIR bits should never already be set because IMR should
501 * prevent an interrupt from being shown in IIR. The warning
502 * displays a case where we've unsafely cleared
503 * dev_priv->rps.pm_iir. Although missing an interrupt of the same
504 * type is not a problem, it displays a problem in the logic.
505 *
506 * The mask bit in IMR is cleared by dev_priv->rps.work.
507 */
508
509 spin_lock_irqsave(&dev_priv->rps.lock, flags);
510 dev_priv->rps.pm_iir |= pm_iir;
511 I915_WRITE(GEN6_PMIMR, dev_priv->rps.pm_iir);
512 POSTING_READ(GEN6_PMIMR);
513 spin_unlock_irqrestore(&dev_priv->rps.lock, flags);
514
515 queue_work(dev_priv->wq, &dev_priv->rps.work);
516 }
517
518 static irqreturn_t valleyview_irq_handler(DRM_IRQ_ARGS)
519 {
520 struct drm_device *dev = (struct drm_device *) arg;
521 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
522 u32 iir, gt_iir, pm_iir;
523 irqreturn_t ret = IRQ_NONE;
524 unsigned long irqflags;
525 int pipe;
526 u32 pipe_stats[I915_MAX_PIPES];
527 bool blc_event;
528
529 atomic_inc(&dev_priv->irq_received);
530
531 while (true) {
532 iir = I915_READ(VLV_IIR);
533 gt_iir = I915_READ(GTIIR);
534 pm_iir = I915_READ(GEN6_PMIIR);
535
536 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
537 goto out;
538
539 ret = IRQ_HANDLED;
540
541 snb_gt_irq_handler(dev, dev_priv, gt_iir);
542
543 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
544 for_each_pipe(pipe) {
545 int reg = PIPESTAT(pipe);
546 pipe_stats[pipe] = I915_READ(reg);
547
548 /*
549 * Clear the PIPE*STAT regs before the IIR
550 */
551 if (pipe_stats[pipe] & 0x8000ffff) {
552 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
553 DRM_DEBUG_DRIVER("pipe %c underrun\n",
554 pipe_name(pipe));
555 I915_WRITE(reg, pipe_stats[pipe]);
556 }
557 }
558 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
559
560 for_each_pipe(pipe) {
561 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
562 drm_handle_vblank(dev, pipe);
563
564 if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
565 intel_prepare_page_flip(dev, pipe);
566 intel_finish_page_flip(dev, pipe);
567 }
568 }
569
570 /* Consume port. Then clear IIR or we'll miss events */
571 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
572 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
573
574 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
575 hotplug_status);
576 if (hotplug_status & dev_priv->hotplug_supported_mask)
577 queue_work(dev_priv->wq,
578 &dev_priv->hotplug_work);
579
580 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
581 I915_READ(PORT_HOTPLUG_STAT);
582 }
583
584 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
585 blc_event = true;
586
587 if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
588 gen6_queue_rps_work(dev_priv, pm_iir);
589
590 I915_WRITE(GTIIR, gt_iir);
591 I915_WRITE(GEN6_PMIIR, pm_iir);
592 I915_WRITE(VLV_IIR, iir);
593 }
594
595 out:
596 return ret;
597 }
598
599 static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
600 {
601 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
602 int pipe;
603
604 if (pch_iir & SDE_AUDIO_POWER_MASK)
605 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
606 (pch_iir & SDE_AUDIO_POWER_MASK) >>
607 SDE_AUDIO_POWER_SHIFT);
608
609 if (pch_iir & SDE_GMBUS)
610 DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
611
612 if (pch_iir & SDE_AUDIO_HDCP_MASK)
613 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
614
615 if (pch_iir & SDE_AUDIO_TRANS_MASK)
616 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
617
618 if (pch_iir & SDE_POISON)
619 DRM_ERROR("PCH poison interrupt\n");
620
621 if (pch_iir & SDE_FDI_MASK)
622 for_each_pipe(pipe)
623 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
624 pipe_name(pipe),
625 I915_READ(FDI_RX_IIR(pipe)));
626
627 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
628 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
629
630 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
631 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
632
633 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
634 DRM_DEBUG_DRIVER("PCH transcoder B underrun interrupt\n");
635 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
636 DRM_DEBUG_DRIVER("PCH transcoder A underrun interrupt\n");
637 }
638
639 static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
640 {
641 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
642 int pipe;
643
644 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT)
645 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
646 (pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
647 SDE_AUDIO_POWER_SHIFT_CPT);
648
649 if (pch_iir & SDE_AUX_MASK_CPT)
650 DRM_DEBUG_DRIVER("AUX channel interrupt\n");
651
652 if (pch_iir & SDE_GMBUS_CPT)
653 DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
654
655 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
656 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
657
658 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
659 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
660
661 if (pch_iir & SDE_FDI_MASK_CPT)
662 for_each_pipe(pipe)
663 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
664 pipe_name(pipe),
665 I915_READ(FDI_RX_IIR(pipe)));
666 }
667
668 static irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS)
669 {
670 struct drm_device *dev = (struct drm_device *) arg;
671 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
672 u32 de_iir, gt_iir, de_ier, pm_iir;
673 irqreturn_t ret = IRQ_NONE;
674 int i;
675
676 atomic_inc(&dev_priv->irq_received);
677
678 /* disable master interrupt before clearing iir */
679 de_ier = I915_READ(DEIER);
680 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
681
682 gt_iir = I915_READ(GTIIR);
683 if (gt_iir) {
684 snb_gt_irq_handler(dev, dev_priv, gt_iir);
685 I915_WRITE(GTIIR, gt_iir);
686 ret = IRQ_HANDLED;
687 }
688
689 de_iir = I915_READ(DEIIR);
690 if (de_iir) {
691 if (de_iir & DE_GSE_IVB)
692 intel_opregion_gse_intr(dev);
693
694 for (i = 0; i < 3; i++) {
695 if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
696 intel_prepare_page_flip(dev, i);
697 intel_finish_page_flip_plane(dev, i);
698 }
699 if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
700 drm_handle_vblank(dev, i);
701 }
702
703 /* check event from PCH */
704 if (de_iir & DE_PCH_EVENT_IVB) {
705 u32 pch_iir = I915_READ(SDEIIR);
706
707 if (pch_iir & SDE_HOTPLUG_MASK_CPT)
708 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
709 cpt_irq_handler(dev, pch_iir);
710
711 /* clear PCH hotplug event before clear CPU irq */
712 I915_WRITE(SDEIIR, pch_iir);
713 }
714
715 I915_WRITE(DEIIR, de_iir);
716 ret = IRQ_HANDLED;
717 }
718
719 pm_iir = I915_READ(GEN6_PMIIR);
720 if (pm_iir) {
721 if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
722 gen6_queue_rps_work(dev_priv, pm_iir);
723 I915_WRITE(GEN6_PMIIR, pm_iir);
724 ret = IRQ_HANDLED;
725 }
726
727 I915_WRITE(DEIER, de_ier);
728 POSTING_READ(DEIER);
729
730 return ret;
731 }
732
733 static void ilk_gt_irq_handler(struct drm_device *dev,
734 struct drm_i915_private *dev_priv,
735 u32 gt_iir)
736 {
737 if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY))
738 notify_ring(dev, &dev_priv->ring[RCS]);
739 if (gt_iir & GT_BSD_USER_INTERRUPT)
740 notify_ring(dev, &dev_priv->ring[VCS]);
741 }
742
743 static irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS)
744 {
745 struct drm_device *dev = (struct drm_device *) arg;
746 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
747 int ret = IRQ_NONE;
748 u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir;
749 u32 hotplug_mask;
750
751 atomic_inc(&dev_priv->irq_received);
752
753 /* disable master interrupt before clearing iir */
754 de_ier = I915_READ(DEIER);
755 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
756 POSTING_READ(DEIER);
757
758 de_iir = I915_READ(DEIIR);
759 gt_iir = I915_READ(GTIIR);
760 pch_iir = I915_READ(SDEIIR);
761 pm_iir = I915_READ(GEN6_PMIIR);
762
763 if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 &&
764 (!IS_GEN6(dev) || pm_iir == 0))
765 goto done;
766
767 if (HAS_PCH_CPT(dev))
768 hotplug_mask = SDE_HOTPLUG_MASK_CPT;
769 else
770 hotplug_mask = SDE_HOTPLUG_MASK;
771
772 ret = IRQ_HANDLED;
773
774 if (IS_GEN5(dev))
775 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
776 else
777 snb_gt_irq_handler(dev, dev_priv, gt_iir);
778
779 if (de_iir & DE_GSE)
780 intel_opregion_gse_intr(dev);
781
782 if (de_iir & DE_PLANEA_FLIP_DONE) {
783 intel_prepare_page_flip(dev, 0);
784 intel_finish_page_flip_plane(dev, 0);
785 }
786
787 if (de_iir & DE_PLANEB_FLIP_DONE) {
788 intel_prepare_page_flip(dev, 1);
789 intel_finish_page_flip_plane(dev, 1);
790 }
791
792 if (de_iir & DE_PIPEA_VBLANK)
793 drm_handle_vblank(dev, 0);
794
795 if (de_iir & DE_PIPEB_VBLANK)
796 drm_handle_vblank(dev, 1);
797
798 /* check event from PCH */
799 if (de_iir & DE_PCH_EVENT) {
800 if (pch_iir & hotplug_mask)
801 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
802 if (HAS_PCH_CPT(dev))
803 cpt_irq_handler(dev, pch_iir);
804 else
805 ibx_irq_handler(dev, pch_iir);
806 }
807
808 if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
809 ironlake_handle_rps_change(dev);
810
811 if (IS_GEN6(dev) && pm_iir & GEN6_PM_DEFERRED_EVENTS)
812 gen6_queue_rps_work(dev_priv, pm_iir);
813
814 /* should clear PCH hotplug event before clear CPU irq */
815 I915_WRITE(SDEIIR, pch_iir);
816 I915_WRITE(GTIIR, gt_iir);
817 I915_WRITE(DEIIR, de_iir);
818 I915_WRITE(GEN6_PMIIR, pm_iir);
819
820 done:
821 I915_WRITE(DEIER, de_ier);
822 POSTING_READ(DEIER);
823
824 return ret;
825 }
826
827 /**
828 * i915_error_work_func - do process context error handling work
829 * @work: work struct
830 *
831 * Fire an error uevent so userspace can see that a hang or error
832 * was detected.
833 */
834 static void i915_error_work_func(struct work_struct *work)
835 {
836 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
837 error_work);
838 struct drm_device *dev = dev_priv->dev;
839 char *error_event[] = { "ERROR=1", NULL };
840 char *reset_event[] = { "RESET=1", NULL };
841 char *reset_done_event[] = { "ERROR=0", NULL };
842
843 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
844
845 if (atomic_read(&dev_priv->mm.wedged)) {
846 DRM_DEBUG_DRIVER("resetting chip\n");
847 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event);
848 if (!i915_reset(dev)) {
849 atomic_set(&dev_priv->mm.wedged, 0);
850 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event);
851 }
852 complete_all(&dev_priv->error_completion);
853 }
854 }
855
856 /* NB: please notice the memset */
857 static void i915_get_extra_instdone(struct drm_device *dev,
858 uint32_t *instdone)
859 {
860 struct drm_i915_private *dev_priv = dev->dev_private;
861 memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
862
863 switch(INTEL_INFO(dev)->gen) {
864 case 2:
865 case 3:
866 instdone[0] = I915_READ(INSTDONE);
867 break;
868 case 4:
869 case 5:
870 case 6:
871 instdone[0] = I915_READ(INSTDONE_I965);
872 instdone[1] = I915_READ(INSTDONE1);
873 break;
874 default:
875 WARN_ONCE(1, "Unsupported platform\n");
876 case 7:
877 instdone[0] = I915_READ(GEN7_INSTDONE_1);
878 instdone[1] = I915_READ(GEN7_SC_INSTDONE);
879 instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
880 instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
881 break;
882 }
883 }
884
885 #ifdef CONFIG_DEBUG_FS
886 static struct drm_i915_error_object *
887 i915_error_object_create(struct drm_i915_private *dev_priv,
888 struct drm_i915_gem_object *src)
889 {
890 struct drm_i915_error_object *dst;
891 int i, count;
892 u32 reloc_offset;
893
894 if (src == NULL || src->pages == NULL)
895 return NULL;
896
897 count = src->base.size / PAGE_SIZE;
898
899 dst = kmalloc(sizeof(*dst) + count * sizeof(u32 *), GFP_ATOMIC);
900 if (dst == NULL)
901 return NULL;
902
903 reloc_offset = src->gtt_offset;
904 for (i = 0; i < count; i++) {
905 unsigned long flags;
906 void *d;
907
908 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
909 if (d == NULL)
910 goto unwind;
911
912 local_irq_save(flags);
913 if (reloc_offset < dev_priv->mm.gtt_mappable_end &&
914 src->has_global_gtt_mapping) {
915 void __iomem *s;
916
917 /* Simply ignore tiling or any overlapping fence.
918 * It's part of the error state, and this hopefully
919 * captures what the GPU read.
920 */
921
922 s = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
923 reloc_offset);
924 memcpy_fromio(d, s, PAGE_SIZE);
925 io_mapping_unmap_atomic(s);
926 } else {
927 struct page *page;
928 void *s;
929
930 page = i915_gem_object_get_page(src, i);
931
932 drm_clflush_pages(&page, 1);
933
934 s = kmap_atomic(page);
935 memcpy(d, s, PAGE_SIZE);
936 kunmap_atomic(s);
937
938 drm_clflush_pages(&page, 1);
939 }
940 local_irq_restore(flags);
941
942 dst->pages[i] = d;
943
944 reloc_offset += PAGE_SIZE;
945 }
946 dst->page_count = count;
947 dst->gtt_offset = src->gtt_offset;
948
949 return dst;
950
951 unwind:
952 while (i--)
953 kfree(dst->pages[i]);
954 kfree(dst);
955 return NULL;
956 }
957
958 static void
959 i915_error_object_free(struct drm_i915_error_object *obj)
960 {
961 int page;
962
963 if (obj == NULL)
964 return;
965
966 for (page = 0; page < obj->page_count; page++)
967 kfree(obj->pages[page]);
968
969 kfree(obj);
970 }
971
972 void
973 i915_error_state_free(struct kref *error_ref)
974 {
975 struct drm_i915_error_state *error = container_of(error_ref,
976 typeof(*error), ref);
977 int i;
978
979 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
980 i915_error_object_free(error->ring[i].batchbuffer);
981 i915_error_object_free(error->ring[i].ringbuffer);
982 kfree(error->ring[i].requests);
983 }
984
985 kfree(error->active_bo);
986 kfree(error->overlay);
987 kfree(error);
988 }
989 static void capture_bo(struct drm_i915_error_buffer *err,
990 struct drm_i915_gem_object *obj)
991 {
992 err->size = obj->base.size;
993 err->name = obj->base.name;
994 err->rseqno = obj->last_read_seqno;
995 err->wseqno = obj->last_write_seqno;
996 err->gtt_offset = obj->gtt_offset;
997 err->read_domains = obj->base.read_domains;
998 err->write_domain = obj->base.write_domain;
999 err->fence_reg = obj->fence_reg;
1000 err->pinned = 0;
1001 if (obj->pin_count > 0)
1002 err->pinned = 1;
1003 if (obj->user_pin_count > 0)
1004 err->pinned = -1;
1005 err->tiling = obj->tiling_mode;
1006 err->dirty = obj->dirty;
1007 err->purgeable = obj->madv != I915_MADV_WILLNEED;
1008 err->ring = obj->ring ? obj->ring->id : -1;
1009 err->cache_level = obj->cache_level;
1010 }
1011
1012 static u32 capture_active_bo(struct drm_i915_error_buffer *err,
1013 int count, struct list_head *head)
1014 {
1015 struct drm_i915_gem_object *obj;
1016 int i = 0;
1017
1018 list_for_each_entry(obj, head, mm_list) {
1019 capture_bo(err++, obj);
1020 if (++i == count)
1021 break;
1022 }
1023
1024 return i;
1025 }
1026
1027 static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
1028 int count, struct list_head *head)
1029 {
1030 struct drm_i915_gem_object *obj;
1031 int i = 0;
1032
1033 list_for_each_entry(obj, head, gtt_list) {
1034 if (obj->pin_count == 0)
1035 continue;
1036
1037 capture_bo(err++, obj);
1038 if (++i == count)
1039 break;
1040 }
1041
1042 return i;
1043 }
1044
1045 static void i915_gem_record_fences(struct drm_device *dev,
1046 struct drm_i915_error_state *error)
1047 {
1048 struct drm_i915_private *dev_priv = dev->dev_private;
1049 int i;
1050
1051 /* Fences */
1052 switch (INTEL_INFO(dev)->gen) {
1053 case 7:
1054 case 6:
1055 for (i = 0; i < 16; i++)
1056 error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
1057 break;
1058 case 5:
1059 case 4:
1060 for (i = 0; i < 16; i++)
1061 error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
1062 break;
1063 case 3:
1064 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
1065 for (i = 0; i < 8; i++)
1066 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
1067 case 2:
1068 for (i = 0; i < 8; i++)
1069 error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
1070 break;
1071
1072 }
1073 }
1074
1075 static struct drm_i915_error_object *
1076 i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
1077 struct intel_ring_buffer *ring)
1078 {
1079 struct drm_i915_gem_object *obj;
1080 u32 seqno;
1081
1082 if (!ring->get_seqno)
1083 return NULL;
1084
1085 seqno = ring->get_seqno(ring, false);
1086 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
1087 if (obj->ring != ring)
1088 continue;
1089
1090 if (i915_seqno_passed(seqno, obj->last_read_seqno))
1091 continue;
1092
1093 if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
1094 continue;
1095
1096 /* We need to copy these to an anonymous buffer as the simplest
1097 * method to avoid being overwritten by userspace.
1098 */
1099 return i915_error_object_create(dev_priv, obj);
1100 }
1101
1102 return NULL;
1103 }
1104
1105 static void i915_record_ring_state(struct drm_device *dev,
1106 struct drm_i915_error_state *error,
1107 struct intel_ring_buffer *ring)
1108 {
1109 struct drm_i915_private *dev_priv = dev->dev_private;
1110
1111 if (INTEL_INFO(dev)->gen >= 6) {
1112 error->rc_psmi[ring->id] = I915_READ(ring->mmio_base + 0x50);
1113 error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
1114 error->semaphore_mboxes[ring->id][0]
1115 = I915_READ(RING_SYNC_0(ring->mmio_base));
1116 error->semaphore_mboxes[ring->id][1]
1117 = I915_READ(RING_SYNC_1(ring->mmio_base));
1118 }
1119
1120 if (INTEL_INFO(dev)->gen >= 4) {
1121 error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
1122 error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
1123 error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
1124 error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
1125 error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
1126 if (ring->id == RCS)
1127 error->bbaddr = I915_READ64(BB_ADDR);
1128 } else {
1129 error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX);
1130 error->ipeir[ring->id] = I915_READ(IPEIR);
1131 error->ipehr[ring->id] = I915_READ(IPEHR);
1132 error->instdone[ring->id] = I915_READ(INSTDONE);
1133 }
1134
1135 error->waiting[ring->id] = waitqueue_active(&ring->irq_queue);
1136 error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
1137 error->seqno[ring->id] = ring->get_seqno(ring, false);
1138 error->acthd[ring->id] = intel_ring_get_active_head(ring);
1139 error->head[ring->id] = I915_READ_HEAD(ring);
1140 error->tail[ring->id] = I915_READ_TAIL(ring);
1141
1142 error->cpu_ring_head[ring->id] = ring->head;
1143 error->cpu_ring_tail[ring->id] = ring->tail;
1144 }
1145
1146 static void i915_gem_record_rings(struct drm_device *dev,
1147 struct drm_i915_error_state *error)
1148 {
1149 struct drm_i915_private *dev_priv = dev->dev_private;
1150 struct intel_ring_buffer *ring;
1151 struct drm_i915_gem_request *request;
1152 int i, count;
1153
1154 for_each_ring(ring, dev_priv, i) {
1155 i915_record_ring_state(dev, error, ring);
1156
1157 error->ring[i].batchbuffer =
1158 i915_error_first_batchbuffer(dev_priv, ring);
1159
1160 error->ring[i].ringbuffer =
1161 i915_error_object_create(dev_priv, ring->obj);
1162
1163 count = 0;
1164 list_for_each_entry(request, &ring->request_list, list)
1165 count++;
1166
1167 error->ring[i].num_requests = count;
1168 error->ring[i].requests =
1169 kmalloc(count*sizeof(struct drm_i915_error_request),
1170 GFP_ATOMIC);
1171 if (error->ring[i].requests == NULL) {
1172 error->ring[i].num_requests = 0;
1173 continue;
1174 }
1175
1176 count = 0;
1177 list_for_each_entry(request, &ring->request_list, list) {
1178 struct drm_i915_error_request *erq;
1179
1180 erq = &error->ring[i].requests[count++];
1181 erq->seqno = request->seqno;
1182 erq->jiffies = request->emitted_jiffies;
1183 erq->tail = request->tail;
1184 }
1185 }
1186 }
1187
1188 /**
1189 * i915_capture_error_state - capture an error record for later analysis
1190 * @dev: drm device
1191 *
1192 * Should be called when an error is detected (either a hang or an error
1193 * interrupt) to capture error state from the time of the error. Fills
1194 * out a structure which becomes available in debugfs for user level tools
1195 * to pick up.
1196 */
1197 static void i915_capture_error_state(struct drm_device *dev)
1198 {
1199 struct drm_i915_private *dev_priv = dev->dev_private;
1200 struct drm_i915_gem_object *obj;
1201 struct drm_i915_error_state *error;
1202 unsigned long flags;
1203 int i, pipe;
1204
1205 spin_lock_irqsave(&dev_priv->error_lock, flags);
1206 error = dev_priv->first_error;
1207 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1208 if (error)
1209 return;
1210
1211 /* Account for pipe specific data like PIPE*STAT */
1212 error = kzalloc(sizeof(*error), GFP_ATOMIC);
1213 if (!error) {
1214 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
1215 return;
1216 }
1217
1218 DRM_INFO("capturing error event; look for more information in /debug/dri/%d/i915_error_state\n",
1219 dev->primary->index);
1220
1221 kref_init(&error->ref);
1222 error->eir = I915_READ(EIR);
1223 error->pgtbl_er = I915_READ(PGTBL_ER);
1224 error->ccid = I915_READ(CCID);
1225
1226 if (HAS_PCH_SPLIT(dev))
1227 error->ier = I915_READ(DEIER) | I915_READ(GTIER);
1228 else if (IS_VALLEYVIEW(dev))
1229 error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
1230 else if (IS_GEN2(dev))
1231 error->ier = I915_READ16(IER);
1232 else
1233 error->ier = I915_READ(IER);
1234
1235 for_each_pipe(pipe)
1236 error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
1237
1238 if (INTEL_INFO(dev)->gen >= 6) {
1239 error->error = I915_READ(ERROR_GEN6);
1240 error->done_reg = I915_READ(DONE_REG);
1241 }
1242
1243 if (INTEL_INFO(dev)->gen == 7)
1244 error->err_int = I915_READ(GEN7_ERR_INT);
1245
1246 i915_get_extra_instdone(dev, error->extra_instdone);
1247
1248 i915_gem_record_fences(dev, error);
1249 i915_gem_record_rings(dev, error);
1250
1251 /* Record buffers on the active and pinned lists. */
1252 error->active_bo = NULL;
1253 error->pinned_bo = NULL;
1254
1255 i = 0;
1256 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
1257 i++;
1258 error->active_bo_count = i;
1259 list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list)
1260 if (obj->pin_count)
1261 i++;
1262 error->pinned_bo_count = i - error->active_bo_count;
1263
1264 error->active_bo = NULL;
1265 error->pinned_bo = NULL;
1266 if (i) {
1267 error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
1268 GFP_ATOMIC);
1269 if (error->active_bo)
1270 error->pinned_bo =
1271 error->active_bo + error->active_bo_count;
1272 }
1273
1274 if (error->active_bo)
1275 error->active_bo_count =
1276 capture_active_bo(error->active_bo,
1277 error->active_bo_count,
1278 &dev_priv->mm.active_list);
1279
1280 if (error->pinned_bo)
1281 error->pinned_bo_count =
1282 capture_pinned_bo(error->pinned_bo,
1283 error->pinned_bo_count,
1284 &dev_priv->mm.bound_list);
1285
1286 do_gettimeofday(&error->time);
1287
1288 error->overlay = intel_overlay_capture_error_state(dev);
1289 error->display = intel_display_capture_error_state(dev);
1290
1291 spin_lock_irqsave(&dev_priv->error_lock, flags);
1292 if (dev_priv->first_error == NULL) {
1293 dev_priv->first_error = error;
1294 error = NULL;
1295 }
1296 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1297
1298 if (error)
1299 i915_error_state_free(&error->ref);
1300 }
1301
1302 void i915_destroy_error_state(struct drm_device *dev)
1303 {
1304 struct drm_i915_private *dev_priv = dev->dev_private;
1305 struct drm_i915_error_state *error;
1306 unsigned long flags;
1307
1308 spin_lock_irqsave(&dev_priv->error_lock, flags);
1309 error = dev_priv->first_error;
1310 dev_priv->first_error = NULL;
1311 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1312
1313 if (error)
1314 kref_put(&error->ref, i915_error_state_free);
1315 }
1316 #else
1317 #define i915_capture_error_state(x)
1318 #endif
1319
1320 static void i915_report_and_clear_eir(struct drm_device *dev)
1321 {
1322 struct drm_i915_private *dev_priv = dev->dev_private;
1323 uint32_t instdone[I915_NUM_INSTDONE_REG];
1324 u32 eir = I915_READ(EIR);
1325 int pipe, i;
1326
1327 if (!eir)
1328 return;
1329
1330 pr_err("render error detected, EIR: 0x%08x\n", eir);
1331
1332 i915_get_extra_instdone(dev, instdone);
1333
1334 if (IS_G4X(dev)) {
1335 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
1336 u32 ipeir = I915_READ(IPEIR_I965);
1337
1338 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
1339 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
1340 for (i = 0; i < ARRAY_SIZE(instdone); i++)
1341 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
1342 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
1343 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
1344 I915_WRITE(IPEIR_I965, ipeir);
1345 POSTING_READ(IPEIR_I965);
1346 }
1347 if (eir & GM45_ERROR_PAGE_TABLE) {
1348 u32 pgtbl_err = I915_READ(PGTBL_ER);
1349 pr_err("page table error\n");
1350 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
1351 I915_WRITE(PGTBL_ER, pgtbl_err);
1352 POSTING_READ(PGTBL_ER);
1353 }
1354 }
1355
1356 if (!IS_GEN2(dev)) {
1357 if (eir & I915_ERROR_PAGE_TABLE) {
1358 u32 pgtbl_err = I915_READ(PGTBL_ER);
1359 pr_err("page table error\n");
1360 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
1361 I915_WRITE(PGTBL_ER, pgtbl_err);
1362 POSTING_READ(PGTBL_ER);
1363 }
1364 }
1365
1366 if (eir & I915_ERROR_MEMORY_REFRESH) {
1367 pr_err("memory refresh error:\n");
1368 for_each_pipe(pipe)
1369 pr_err("pipe %c stat: 0x%08x\n",
1370 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
1371 /* pipestat has already been acked */
1372 }
1373 if (eir & I915_ERROR_INSTRUCTION) {
1374 pr_err("instruction error\n");
1375 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
1376 for (i = 0; i < ARRAY_SIZE(instdone); i++)
1377 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
1378 if (INTEL_INFO(dev)->gen < 4) {
1379 u32 ipeir = I915_READ(IPEIR);
1380
1381 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
1382 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
1383 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
1384 I915_WRITE(IPEIR, ipeir);
1385 POSTING_READ(IPEIR);
1386 } else {
1387 u32 ipeir = I915_READ(IPEIR_I965);
1388
1389 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
1390 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
1391 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
1392 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
1393 I915_WRITE(IPEIR_I965, ipeir);
1394 POSTING_READ(IPEIR_I965);
1395 }
1396 }
1397
1398 I915_WRITE(EIR, eir);
1399 POSTING_READ(EIR);
1400 eir = I915_READ(EIR);
1401 if (eir) {
1402 /*
1403 * some errors might have become stuck,
1404 * mask them.
1405 */
1406 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
1407 I915_WRITE(EMR, I915_READ(EMR) | eir);
1408 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
1409 }
1410 }
1411
1412 /**
1413 * i915_handle_error - handle an error interrupt
1414 * @dev: drm device
1415 *
1416 * Do some basic checking of regsiter state at error interrupt time and
1417 * dump it to the syslog. Also call i915_capture_error_state() to make
1418 * sure we get a record and make it available in debugfs. Fire a uevent
1419 * so userspace knows something bad happened (should trigger collection
1420 * of a ring dump etc.).
1421 */
1422 void i915_handle_error(struct drm_device *dev, bool wedged)
1423 {
1424 struct drm_i915_private *dev_priv = dev->dev_private;
1425 struct intel_ring_buffer *ring;
1426 int i;
1427
1428 i915_capture_error_state(dev);
1429 i915_report_and_clear_eir(dev);
1430
1431 if (wedged) {
1432 INIT_COMPLETION(dev_priv->error_completion);
1433 atomic_set(&dev_priv->mm.wedged, 1);
1434
1435 /*
1436 * Wakeup waiting processes so they don't hang
1437 */
1438 for_each_ring(ring, dev_priv, i)
1439 wake_up_all(&ring->irq_queue);
1440 }
1441
1442 queue_work(dev_priv->wq, &dev_priv->error_work);
1443 }
1444
1445 static void i915_pageflip_stall_check(struct drm_device *dev, int pipe)
1446 {
1447 drm_i915_private_t *dev_priv = dev->dev_private;
1448 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1449 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1450 struct drm_i915_gem_object *obj;
1451 struct intel_unpin_work *work;
1452 unsigned long flags;
1453 bool stall_detected;
1454
1455 /* Ignore early vblank irqs */
1456 if (intel_crtc == NULL)
1457 return;
1458
1459 spin_lock_irqsave(&dev->event_lock, flags);
1460 work = intel_crtc->unpin_work;
1461
1462 if (work == NULL || work->pending || !work->enable_stall_check) {
1463 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
1464 spin_unlock_irqrestore(&dev->event_lock, flags);
1465 return;
1466 }
1467
1468 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
1469 obj = work->pending_flip_obj;
1470 if (INTEL_INFO(dev)->gen >= 4) {
1471 int dspsurf = DSPSURF(intel_crtc->plane);
1472 stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
1473 obj->gtt_offset;
1474 } else {
1475 int dspaddr = DSPADDR(intel_crtc->plane);
1476 stall_detected = I915_READ(dspaddr) == (obj->gtt_offset +
1477 crtc->y * crtc->fb->pitches[0] +
1478 crtc->x * crtc->fb->bits_per_pixel/8);
1479 }
1480
1481 spin_unlock_irqrestore(&dev->event_lock, flags);
1482
1483 if (stall_detected) {
1484 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
1485 intel_prepare_page_flip(dev, intel_crtc->plane);
1486 }
1487 }
1488
1489 /* Called from drm generic code, passed 'crtc' which
1490 * we use as a pipe index
1491 */
1492 static int i915_enable_vblank(struct drm_device *dev, int pipe)
1493 {
1494 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1495 unsigned long irqflags;
1496
1497 if (!i915_pipe_enabled(dev, pipe))
1498 return -EINVAL;
1499
1500 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1501 if (INTEL_INFO(dev)->gen >= 4)
1502 i915_enable_pipestat(dev_priv, pipe,
1503 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1504 else
1505 i915_enable_pipestat(dev_priv, pipe,
1506 PIPE_VBLANK_INTERRUPT_ENABLE);
1507
1508 /* maintain vblank delivery even in deep C-states */
1509 if (dev_priv->info->gen == 3)
1510 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
1511 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1512
1513 return 0;
1514 }
1515
1516 static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
1517 {
1518 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1519 unsigned long irqflags;
1520
1521 if (!i915_pipe_enabled(dev, pipe))
1522 return -EINVAL;
1523
1524 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1525 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
1526 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
1527 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1528
1529 return 0;
1530 }
1531
1532 static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
1533 {
1534 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1535 unsigned long irqflags;
1536
1537 if (!i915_pipe_enabled(dev, pipe))
1538 return -EINVAL;
1539
1540 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1541 ironlake_enable_display_irq(dev_priv,
1542 DE_PIPEA_VBLANK_IVB << (5 * pipe));
1543 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1544
1545 return 0;
1546 }
1547
1548 static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
1549 {
1550 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1551 unsigned long irqflags;
1552 u32 imr;
1553
1554 if (!i915_pipe_enabled(dev, pipe))
1555 return -EINVAL;
1556
1557 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1558 imr = I915_READ(VLV_IMR);
1559 if (pipe == 0)
1560 imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
1561 else
1562 imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1563 I915_WRITE(VLV_IMR, imr);
1564 i915_enable_pipestat(dev_priv, pipe,
1565 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1566 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1567
1568 return 0;
1569 }
1570
1571 /* Called from drm generic code, passed 'crtc' which
1572 * we use as a pipe index
1573 */
1574 static void i915_disable_vblank(struct drm_device *dev, int pipe)
1575 {
1576 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1577 unsigned long irqflags;
1578
1579 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1580 if (dev_priv->info->gen == 3)
1581 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
1582
1583 i915_disable_pipestat(dev_priv, pipe,
1584 PIPE_VBLANK_INTERRUPT_ENABLE |
1585 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1586 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1587 }
1588
1589 static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
1590 {
1591 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1592 unsigned long irqflags;
1593
1594 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1595 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
1596 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
1597 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1598 }
1599
1600 static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
1601 {
1602 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1603 unsigned long irqflags;
1604
1605 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1606 ironlake_disable_display_irq(dev_priv,
1607 DE_PIPEA_VBLANK_IVB << (pipe * 5));
1608 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1609 }
1610
1611 static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
1612 {
1613 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1614 unsigned long irqflags;
1615 u32 imr;
1616
1617 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1618 i915_disable_pipestat(dev_priv, pipe,
1619 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1620 imr = I915_READ(VLV_IMR);
1621 if (pipe == 0)
1622 imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
1623 else
1624 imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1625 I915_WRITE(VLV_IMR, imr);
1626 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1627 }
1628
1629 static u32
1630 ring_last_seqno(struct intel_ring_buffer *ring)
1631 {
1632 return list_entry(ring->request_list.prev,
1633 struct drm_i915_gem_request, list)->seqno;
1634 }
1635
1636 static bool i915_hangcheck_ring_idle(struct intel_ring_buffer *ring, bool *err)
1637 {
1638 if (list_empty(&ring->request_list) ||
1639 i915_seqno_passed(ring->get_seqno(ring, false),
1640 ring_last_seqno(ring))) {
1641 /* Issue a wake-up to catch stuck h/w. */
1642 if (waitqueue_active(&ring->irq_queue)) {
1643 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
1644 ring->name);
1645 wake_up_all(&ring->irq_queue);
1646 *err = true;
1647 }
1648 return true;
1649 }
1650 return false;
1651 }
1652
1653 static bool kick_ring(struct intel_ring_buffer *ring)
1654 {
1655 struct drm_device *dev = ring->dev;
1656 struct drm_i915_private *dev_priv = dev->dev_private;
1657 u32 tmp = I915_READ_CTL(ring);
1658 if (tmp & RING_WAIT) {
1659 DRM_ERROR("Kicking stuck wait on %s\n",
1660 ring->name);
1661 I915_WRITE_CTL(ring, tmp);
1662 return true;
1663 }
1664 return false;
1665 }
1666
1667 static bool i915_hangcheck_hung(struct drm_device *dev)
1668 {
1669 drm_i915_private_t *dev_priv = dev->dev_private;
1670
1671 if (dev_priv->hangcheck_count++ > 1) {
1672 bool hung = true;
1673
1674 DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
1675 i915_handle_error(dev, true);
1676
1677 if (!IS_GEN2(dev)) {
1678 struct intel_ring_buffer *ring;
1679 int i;
1680
1681 /* Is the chip hanging on a WAIT_FOR_EVENT?
1682 * If so we can simply poke the RB_WAIT bit
1683 * and break the hang. This should work on
1684 * all but the second generation chipsets.
1685 */
1686 for_each_ring(ring, dev_priv, i)
1687 hung &= !kick_ring(ring);
1688 }
1689
1690 return hung;
1691 }
1692
1693 return false;
1694 }
1695
1696 /**
1697 * This is called when the chip hasn't reported back with completed
1698 * batchbuffers in a long time. The first time this is called we simply record
1699 * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses
1700 * again, we assume the chip is wedged and try to fix it.
1701 */
1702 void i915_hangcheck_elapsed(unsigned long data)
1703 {
1704 struct drm_device *dev = (struct drm_device *)data;
1705 drm_i915_private_t *dev_priv = dev->dev_private;
1706 uint32_t acthd[I915_NUM_RINGS], instdone[I915_NUM_INSTDONE_REG];
1707 struct intel_ring_buffer *ring;
1708 bool err = false, idle;
1709 int i;
1710
1711 if (!i915_enable_hangcheck)
1712 return;
1713
1714 memset(acthd, 0, sizeof(acthd));
1715 idle = true;
1716 for_each_ring(ring, dev_priv, i) {
1717 idle &= i915_hangcheck_ring_idle(ring, &err);
1718 acthd[i] = intel_ring_get_active_head(ring);
1719 }
1720
1721 /* If all work is done then ACTHD clearly hasn't advanced. */
1722 if (idle) {
1723 if (err) {
1724 if (i915_hangcheck_hung(dev))
1725 return;
1726
1727 goto repeat;
1728 }
1729
1730 dev_priv->hangcheck_count = 0;
1731 return;
1732 }
1733
1734 i915_get_extra_instdone(dev, instdone);
1735 if (memcmp(dev_priv->last_acthd, acthd, sizeof(acthd)) == 0 &&
1736 memcmp(dev_priv->prev_instdone, instdone, sizeof(instdone)) == 0) {
1737 if (i915_hangcheck_hung(dev))
1738 return;
1739 } else {
1740 dev_priv->hangcheck_count = 0;
1741
1742 memcpy(dev_priv->last_acthd, acthd, sizeof(acthd));
1743 memcpy(dev_priv->prev_instdone, instdone, sizeof(instdone));
1744 }
1745
1746 repeat:
1747 /* Reset timer case chip hangs without another request being added */
1748 mod_timer(&dev_priv->hangcheck_timer,
1749 jiffies + msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
1750 }
1751
1752 /* drm_dma.h hooks
1753 */
1754 static void ironlake_irq_preinstall(struct drm_device *dev)
1755 {
1756 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1757
1758 atomic_set(&dev_priv->irq_received, 0);
1759
1760 I915_WRITE(HWSTAM, 0xeffe);
1761
1762 /* XXX hotplug from PCH */
1763
1764 I915_WRITE(DEIMR, 0xffffffff);
1765 I915_WRITE(DEIER, 0x0);
1766 POSTING_READ(DEIER);
1767
1768 /* and GT */
1769 I915_WRITE(GTIMR, 0xffffffff);
1770 I915_WRITE(GTIER, 0x0);
1771 POSTING_READ(GTIER);
1772
1773 /* south display irq */
1774 I915_WRITE(SDEIMR, 0xffffffff);
1775 I915_WRITE(SDEIER, 0x0);
1776 POSTING_READ(SDEIER);
1777 }
1778
1779 static void valleyview_irq_preinstall(struct drm_device *dev)
1780 {
1781 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1782 int pipe;
1783
1784 atomic_set(&dev_priv->irq_received, 0);
1785
1786 /* VLV magic */
1787 I915_WRITE(VLV_IMR, 0);
1788 I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
1789 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
1790 I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
1791
1792 /* and GT */
1793 I915_WRITE(GTIIR, I915_READ(GTIIR));
1794 I915_WRITE(GTIIR, I915_READ(GTIIR));
1795 I915_WRITE(GTIMR, 0xffffffff);
1796 I915_WRITE(GTIER, 0x0);
1797 POSTING_READ(GTIER);
1798
1799 I915_WRITE(DPINVGTT, 0xff);
1800
1801 I915_WRITE(PORT_HOTPLUG_EN, 0);
1802 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
1803 for_each_pipe(pipe)
1804 I915_WRITE(PIPESTAT(pipe), 0xffff);
1805 I915_WRITE(VLV_IIR, 0xffffffff);
1806 I915_WRITE(VLV_IMR, 0xffffffff);
1807 I915_WRITE(VLV_IER, 0x0);
1808 POSTING_READ(VLV_IER);
1809 }
1810
1811 /*
1812 * Enable digital hotplug on the PCH, and configure the DP short pulse
1813 * duration to 2ms (which is the minimum in the Display Port spec)
1814 *
1815 * This register is the same on all known PCH chips.
1816 */
1817
1818 static void ironlake_enable_pch_hotplug(struct drm_device *dev)
1819 {
1820 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1821 u32 hotplug;
1822
1823 hotplug = I915_READ(PCH_PORT_HOTPLUG);
1824 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
1825 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
1826 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
1827 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
1828 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
1829 }
1830
1831 static int ironlake_irq_postinstall(struct drm_device *dev)
1832 {
1833 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1834 /* enable kind of interrupts always enabled */
1835 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
1836 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE;
1837 u32 render_irqs;
1838 u32 hotplug_mask;
1839
1840 dev_priv->irq_mask = ~display_mask;
1841
1842 /* should always can generate irq */
1843 I915_WRITE(DEIIR, I915_READ(DEIIR));
1844 I915_WRITE(DEIMR, dev_priv->irq_mask);
1845 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK);
1846 POSTING_READ(DEIER);
1847
1848 dev_priv->gt_irq_mask = ~0;
1849
1850 I915_WRITE(GTIIR, I915_READ(GTIIR));
1851 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1852
1853 if (IS_GEN6(dev))
1854 render_irqs =
1855 GT_USER_INTERRUPT |
1856 GEN6_BSD_USER_INTERRUPT |
1857 GEN6_BLITTER_USER_INTERRUPT;
1858 else
1859 render_irqs =
1860 GT_USER_INTERRUPT |
1861 GT_PIPE_NOTIFY |
1862 GT_BSD_USER_INTERRUPT;
1863 I915_WRITE(GTIER, render_irqs);
1864 POSTING_READ(GTIER);
1865
1866 if (HAS_PCH_CPT(dev)) {
1867 hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1868 SDE_PORTB_HOTPLUG_CPT |
1869 SDE_PORTC_HOTPLUG_CPT |
1870 SDE_PORTD_HOTPLUG_CPT);
1871 } else {
1872 hotplug_mask = (SDE_CRT_HOTPLUG |
1873 SDE_PORTB_HOTPLUG |
1874 SDE_PORTC_HOTPLUG |
1875 SDE_PORTD_HOTPLUG |
1876 SDE_AUX_MASK);
1877 }
1878
1879 dev_priv->pch_irq_mask = ~hotplug_mask;
1880
1881 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1882 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
1883 I915_WRITE(SDEIER, hotplug_mask);
1884 POSTING_READ(SDEIER);
1885
1886 ironlake_enable_pch_hotplug(dev);
1887
1888 if (IS_IRONLAKE_M(dev)) {
1889 /* Clear & enable PCU event interrupts */
1890 I915_WRITE(DEIIR, DE_PCU_EVENT);
1891 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
1892 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
1893 }
1894
1895 return 0;
1896 }
1897
1898 static int ivybridge_irq_postinstall(struct drm_device *dev)
1899 {
1900 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1901 /* enable kind of interrupts always enabled */
1902 u32 display_mask =
1903 DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | DE_PCH_EVENT_IVB |
1904 DE_PLANEC_FLIP_DONE_IVB |
1905 DE_PLANEB_FLIP_DONE_IVB |
1906 DE_PLANEA_FLIP_DONE_IVB;
1907 u32 render_irqs;
1908 u32 hotplug_mask;
1909
1910 dev_priv->irq_mask = ~display_mask;
1911
1912 /* should always can generate irq */
1913 I915_WRITE(DEIIR, I915_READ(DEIIR));
1914 I915_WRITE(DEIMR, dev_priv->irq_mask);
1915 I915_WRITE(DEIER,
1916 display_mask |
1917 DE_PIPEC_VBLANK_IVB |
1918 DE_PIPEB_VBLANK_IVB |
1919 DE_PIPEA_VBLANK_IVB);
1920 POSTING_READ(DEIER);
1921
1922 dev_priv->gt_irq_mask = ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
1923
1924 I915_WRITE(GTIIR, I915_READ(GTIIR));
1925 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1926
1927 render_irqs = GT_USER_INTERRUPT | GEN6_BSD_USER_INTERRUPT |
1928 GEN6_BLITTER_USER_INTERRUPT | GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
1929 I915_WRITE(GTIER, render_irqs);
1930 POSTING_READ(GTIER);
1931
1932 hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1933 SDE_PORTB_HOTPLUG_CPT |
1934 SDE_PORTC_HOTPLUG_CPT |
1935 SDE_PORTD_HOTPLUG_CPT);
1936 dev_priv->pch_irq_mask = ~hotplug_mask;
1937
1938 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1939 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
1940 I915_WRITE(SDEIER, hotplug_mask);
1941 POSTING_READ(SDEIER);
1942
1943 ironlake_enable_pch_hotplug(dev);
1944
1945 return 0;
1946 }
1947
1948 static int valleyview_irq_postinstall(struct drm_device *dev)
1949 {
1950 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1951 u32 enable_mask;
1952 u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
1953 u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV;
1954 u16 msid;
1955
1956 enable_mask = I915_DISPLAY_PORT_INTERRUPT;
1957 enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
1958 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
1959 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
1960 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1961
1962 /*
1963 *Leave vblank interrupts masked initially. enable/disable will
1964 * toggle them based on usage.
1965 */
1966 dev_priv->irq_mask = (~enable_mask) |
1967 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
1968 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1969
1970 dev_priv->pipestat[0] = 0;
1971 dev_priv->pipestat[1] = 0;
1972
1973 /* Hack for broken MSIs on VLV */
1974 pci_write_config_dword(dev_priv->dev->pdev, 0x94, 0xfee00000);
1975 pci_read_config_word(dev->pdev, 0x98, &msid);
1976 msid &= 0xff; /* mask out delivery bits */
1977 msid |= (1<<14);
1978 pci_write_config_word(dev_priv->dev->pdev, 0x98, msid);
1979
1980 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
1981 I915_WRITE(VLV_IER, enable_mask);
1982 I915_WRITE(VLV_IIR, 0xffffffff);
1983 I915_WRITE(PIPESTAT(0), 0xffff);
1984 I915_WRITE(PIPESTAT(1), 0xffff);
1985 POSTING_READ(VLV_IER);
1986
1987 i915_enable_pipestat(dev_priv, 0, pipestat_enable);
1988 i915_enable_pipestat(dev_priv, 1, pipestat_enable);
1989
1990 I915_WRITE(VLV_IIR, 0xffffffff);
1991 I915_WRITE(VLV_IIR, 0xffffffff);
1992
1993 dev_priv->gt_irq_mask = ~0;
1994
1995 I915_WRITE(GTIIR, I915_READ(GTIIR));
1996 I915_WRITE(GTIIR, I915_READ(GTIIR));
1997 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1998 I915_WRITE(GTIER, GT_GEN6_BLT_FLUSHDW_NOTIFY_INTERRUPT |
1999 GT_GEN6_BLT_CS_ERROR_INTERRUPT |
2000 GT_GEN6_BLT_USER_INTERRUPT |
2001 GT_GEN6_BSD_USER_INTERRUPT |
2002 GT_GEN6_BSD_CS_ERROR_INTERRUPT |
2003 GT_GEN7_L3_PARITY_ERROR_INTERRUPT |
2004 GT_PIPE_NOTIFY |
2005 GT_RENDER_CS_ERROR_INTERRUPT |
2006 GT_SYNC_STATUS |
2007 GT_USER_INTERRUPT);
2008 POSTING_READ(GTIER);
2009
2010 /* ack & enable invalid PTE error interrupts */
2011 #if 0 /* FIXME: add support to irq handler for checking these bits */
2012 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
2013 I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
2014 #endif
2015
2016 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
2017 #if 0 /* FIXME: check register definitions; some have moved */
2018 /* Note HDMI and DP share bits */
2019 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2020 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2021 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2022 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2023 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2024 hotplug_en |= HDMID_HOTPLUG_INT_EN;
2025 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
2026 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2027 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
2028 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2029 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2030 hotplug_en |= CRT_HOTPLUG_INT_EN;
2031 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2032 }
2033 #endif
2034
2035 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2036
2037 return 0;
2038 }
2039
2040 static void valleyview_irq_uninstall(struct drm_device *dev)
2041 {
2042 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2043 int pipe;
2044
2045 if (!dev_priv)
2046 return;
2047
2048 for_each_pipe(pipe)
2049 I915_WRITE(PIPESTAT(pipe), 0xffff);
2050
2051 I915_WRITE(HWSTAM, 0xffffffff);
2052 I915_WRITE(PORT_HOTPLUG_EN, 0);
2053 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2054 for_each_pipe(pipe)
2055 I915_WRITE(PIPESTAT(pipe), 0xffff);
2056 I915_WRITE(VLV_IIR, 0xffffffff);
2057 I915_WRITE(VLV_IMR, 0xffffffff);
2058 I915_WRITE(VLV_IER, 0x0);
2059 POSTING_READ(VLV_IER);
2060 }
2061
2062 static void ironlake_irq_uninstall(struct drm_device *dev)
2063 {
2064 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2065
2066 if (!dev_priv)
2067 return;
2068
2069 I915_WRITE(HWSTAM, 0xffffffff);
2070
2071 I915_WRITE(DEIMR, 0xffffffff);
2072 I915_WRITE(DEIER, 0x0);
2073 I915_WRITE(DEIIR, I915_READ(DEIIR));
2074
2075 I915_WRITE(GTIMR, 0xffffffff);
2076 I915_WRITE(GTIER, 0x0);
2077 I915_WRITE(GTIIR, I915_READ(GTIIR));
2078
2079 I915_WRITE(SDEIMR, 0xffffffff);
2080 I915_WRITE(SDEIER, 0x0);
2081 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2082 }
2083
2084 static void i8xx_irq_preinstall(struct drm_device * dev)
2085 {
2086 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2087 int pipe;
2088
2089 atomic_set(&dev_priv->irq_received, 0);
2090
2091 for_each_pipe(pipe)
2092 I915_WRITE(PIPESTAT(pipe), 0);
2093 I915_WRITE16(IMR, 0xffff);
2094 I915_WRITE16(IER, 0x0);
2095 POSTING_READ16(IER);
2096 }
2097
2098 static int i8xx_irq_postinstall(struct drm_device *dev)
2099 {
2100 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2101
2102 dev_priv->pipestat[0] = 0;
2103 dev_priv->pipestat[1] = 0;
2104
2105 I915_WRITE16(EMR,
2106 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2107
2108 /* Unmask the interrupts that we always want on. */
2109 dev_priv->irq_mask =
2110 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2111 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2112 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2113 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2114 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2115 I915_WRITE16(IMR, dev_priv->irq_mask);
2116
2117 I915_WRITE16(IER,
2118 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2119 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2120 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2121 I915_USER_INTERRUPT);
2122 POSTING_READ16(IER);
2123
2124 return 0;
2125 }
2126
2127 static irqreturn_t i8xx_irq_handler(DRM_IRQ_ARGS)
2128 {
2129 struct drm_device *dev = (struct drm_device *) arg;
2130 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2131 u16 iir, new_iir;
2132 u32 pipe_stats[2];
2133 unsigned long irqflags;
2134 int irq_received;
2135 int pipe;
2136 u16 flip_mask =
2137 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2138 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2139
2140 atomic_inc(&dev_priv->irq_received);
2141
2142 iir = I915_READ16(IIR);
2143 if (iir == 0)
2144 return IRQ_NONE;
2145
2146 while (iir & ~flip_mask) {
2147 /* Can't rely on pipestat interrupt bit in iir as it might
2148 * have been cleared after the pipestat interrupt was received.
2149 * It doesn't set the bit in iir again, but it still produces
2150 * interrupts (for non-MSI).
2151 */
2152 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2153 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2154 i915_handle_error(dev, false);
2155
2156 for_each_pipe(pipe) {
2157 int reg = PIPESTAT(pipe);
2158 pipe_stats[pipe] = I915_READ(reg);
2159
2160 /*
2161 * Clear the PIPE*STAT regs before the IIR
2162 */
2163 if (pipe_stats[pipe] & 0x8000ffff) {
2164 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2165 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2166 pipe_name(pipe));
2167 I915_WRITE(reg, pipe_stats[pipe]);
2168 irq_received = 1;
2169 }
2170 }
2171 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2172
2173 I915_WRITE16(IIR, iir & ~flip_mask);
2174 new_iir = I915_READ16(IIR); /* Flush posted writes */
2175
2176 i915_update_dri1_breadcrumb(dev);
2177
2178 if (iir & I915_USER_INTERRUPT)
2179 notify_ring(dev, &dev_priv->ring[RCS]);
2180
2181 if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
2182 drm_handle_vblank(dev, 0)) {
2183 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) {
2184 intel_prepare_page_flip(dev, 0);
2185 intel_finish_page_flip(dev, 0);
2186 flip_mask &= ~I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT;
2187 }
2188 }
2189
2190 if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
2191 drm_handle_vblank(dev, 1)) {
2192 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) {
2193 intel_prepare_page_flip(dev, 1);
2194 intel_finish_page_flip(dev, 1);
2195 flip_mask &= ~I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2196 }
2197 }
2198
2199 iir = new_iir;
2200 }
2201
2202 return IRQ_HANDLED;
2203 }
2204
2205 static void i8xx_irq_uninstall(struct drm_device * dev)
2206 {
2207 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2208 int pipe;
2209
2210 for_each_pipe(pipe) {
2211 /* Clear enable bits; then clear status bits */
2212 I915_WRITE(PIPESTAT(pipe), 0);
2213 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
2214 }
2215 I915_WRITE16(IMR, 0xffff);
2216 I915_WRITE16(IER, 0x0);
2217 I915_WRITE16(IIR, I915_READ16(IIR));
2218 }
2219
2220 static void i915_irq_preinstall(struct drm_device * dev)
2221 {
2222 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2223 int pipe;
2224
2225 atomic_set(&dev_priv->irq_received, 0);
2226
2227 if (I915_HAS_HOTPLUG(dev)) {
2228 I915_WRITE(PORT_HOTPLUG_EN, 0);
2229 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2230 }
2231
2232 I915_WRITE16(HWSTAM, 0xeffe);
2233 for_each_pipe(pipe)
2234 I915_WRITE(PIPESTAT(pipe), 0);
2235 I915_WRITE(IMR, 0xffffffff);
2236 I915_WRITE(IER, 0x0);
2237 POSTING_READ(IER);
2238 }
2239
2240 static int i915_irq_postinstall(struct drm_device *dev)
2241 {
2242 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2243 u32 enable_mask;
2244
2245 dev_priv->pipestat[0] = 0;
2246 dev_priv->pipestat[1] = 0;
2247
2248 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2249
2250 /* Unmask the interrupts that we always want on. */
2251 dev_priv->irq_mask =
2252 ~(I915_ASLE_INTERRUPT |
2253 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2254 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2255 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2256 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2257 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2258
2259 enable_mask =
2260 I915_ASLE_INTERRUPT |
2261 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2262 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2263 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2264 I915_USER_INTERRUPT;
2265
2266 if (I915_HAS_HOTPLUG(dev)) {
2267 /* Enable in IER... */
2268 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
2269 /* and unmask in IMR */
2270 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
2271 }
2272
2273 I915_WRITE(IMR, dev_priv->irq_mask);
2274 I915_WRITE(IER, enable_mask);
2275 POSTING_READ(IER);
2276
2277 if (I915_HAS_HOTPLUG(dev)) {
2278 u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
2279
2280 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2281 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2282 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2283 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2284 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2285 hotplug_en |= HDMID_HOTPLUG_INT_EN;
2286 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_I915)
2287 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2288 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I915)
2289 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2290 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2291 hotplug_en |= CRT_HOTPLUG_INT_EN;
2292 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2293 }
2294
2295 /* Ignore TV since it's buggy */
2296
2297 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2298 }
2299
2300 intel_opregion_enable_asle(dev);
2301
2302 return 0;
2303 }
2304
2305 static irqreturn_t i915_irq_handler(DRM_IRQ_ARGS)
2306 {
2307 struct drm_device *dev = (struct drm_device *) arg;
2308 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2309 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
2310 unsigned long irqflags;
2311 u32 flip_mask =
2312 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2313 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2314 u32 flip[2] = {
2315 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT,
2316 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
2317 };
2318 int pipe, ret = IRQ_NONE;
2319
2320 atomic_inc(&dev_priv->irq_received);
2321
2322 iir = I915_READ(IIR);
2323 do {
2324 bool irq_received = (iir & ~flip_mask) != 0;
2325 bool blc_event = false;
2326
2327 /* Can't rely on pipestat interrupt bit in iir as it might
2328 * have been cleared after the pipestat interrupt was received.
2329 * It doesn't set the bit in iir again, but it still produces
2330 * interrupts (for non-MSI).
2331 */
2332 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2333 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2334 i915_handle_error(dev, false);
2335
2336 for_each_pipe(pipe) {
2337 int reg = PIPESTAT(pipe);
2338 pipe_stats[pipe] = I915_READ(reg);
2339
2340 /* Clear the PIPE*STAT regs before the IIR */
2341 if (pipe_stats[pipe] & 0x8000ffff) {
2342 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2343 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2344 pipe_name(pipe));
2345 I915_WRITE(reg, pipe_stats[pipe]);
2346 irq_received = true;
2347 }
2348 }
2349 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2350
2351 if (!irq_received)
2352 break;
2353
2354 /* Consume port. Then clear IIR or we'll miss events */
2355 if ((I915_HAS_HOTPLUG(dev)) &&
2356 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
2357 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
2358
2359 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2360 hotplug_status);
2361 if (hotplug_status & dev_priv->hotplug_supported_mask)
2362 queue_work(dev_priv->wq,
2363 &dev_priv->hotplug_work);
2364
2365 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
2366 POSTING_READ(PORT_HOTPLUG_STAT);
2367 }
2368
2369 I915_WRITE(IIR, iir & ~flip_mask);
2370 new_iir = I915_READ(IIR); /* Flush posted writes */
2371
2372 if (iir & I915_USER_INTERRUPT)
2373 notify_ring(dev, &dev_priv->ring[RCS]);
2374
2375 for_each_pipe(pipe) {
2376 int plane = pipe;
2377 if (IS_MOBILE(dev))
2378 plane = !plane;
2379 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
2380 drm_handle_vblank(dev, pipe)) {
2381 if (iir & flip[plane]) {
2382 intel_prepare_page_flip(dev, plane);
2383 intel_finish_page_flip(dev, pipe);
2384 flip_mask &= ~flip[plane];
2385 }
2386 }
2387
2388 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
2389 blc_event = true;
2390 }
2391
2392 if (blc_event || (iir & I915_ASLE_INTERRUPT))
2393 intel_opregion_asle_intr(dev);
2394
2395 /* With MSI, interrupts are only generated when iir
2396 * transitions from zero to nonzero. If another bit got
2397 * set while we were handling the existing iir bits, then
2398 * we would never get another interrupt.
2399 *
2400 * This is fine on non-MSI as well, as if we hit this path
2401 * we avoid exiting the interrupt handler only to generate
2402 * another one.
2403 *
2404 * Note that for MSI this could cause a stray interrupt report
2405 * if an interrupt landed in the time between writing IIR and
2406 * the posting read. This should be rare enough to never
2407 * trigger the 99% of 100,000 interrupts test for disabling
2408 * stray interrupts.
2409 */
2410 ret = IRQ_HANDLED;
2411 iir = new_iir;
2412 } while (iir & ~flip_mask);
2413
2414 i915_update_dri1_breadcrumb(dev);
2415
2416 return ret;
2417 }
2418
2419 static void i915_irq_uninstall(struct drm_device * dev)
2420 {
2421 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2422 int pipe;
2423
2424 if (I915_HAS_HOTPLUG(dev)) {
2425 I915_WRITE(PORT_HOTPLUG_EN, 0);
2426 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2427 }
2428
2429 I915_WRITE16(HWSTAM, 0xffff);
2430 for_each_pipe(pipe) {
2431 /* Clear enable bits; then clear status bits */
2432 I915_WRITE(PIPESTAT(pipe), 0);
2433 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
2434 }
2435 I915_WRITE(IMR, 0xffffffff);
2436 I915_WRITE(IER, 0x0);
2437
2438 I915_WRITE(IIR, I915_READ(IIR));
2439 }
2440
2441 static void i965_irq_preinstall(struct drm_device * dev)
2442 {
2443 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2444 int pipe;
2445
2446 atomic_set(&dev_priv->irq_received, 0);
2447
2448 I915_WRITE(PORT_HOTPLUG_EN, 0);
2449 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2450
2451 I915_WRITE(HWSTAM, 0xeffe);
2452 for_each_pipe(pipe)
2453 I915_WRITE(PIPESTAT(pipe), 0);
2454 I915_WRITE(IMR, 0xffffffff);
2455 I915_WRITE(IER, 0x0);
2456 POSTING_READ(IER);
2457 }
2458
2459 static int i965_irq_postinstall(struct drm_device *dev)
2460 {
2461 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2462 u32 hotplug_en;
2463 u32 enable_mask;
2464 u32 error_mask;
2465
2466 /* Unmask the interrupts that we always want on. */
2467 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
2468 I915_DISPLAY_PORT_INTERRUPT |
2469 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2470 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2471 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2472 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2473 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2474
2475 enable_mask = ~dev_priv->irq_mask;
2476 enable_mask |= I915_USER_INTERRUPT;
2477
2478 if (IS_G4X(dev))
2479 enable_mask |= I915_BSD_USER_INTERRUPT;
2480
2481 dev_priv->pipestat[0] = 0;
2482 dev_priv->pipestat[1] = 0;
2483
2484 /*
2485 * Enable some error detection, note the instruction error mask
2486 * bit is reserved, so we leave it masked.
2487 */
2488 if (IS_G4X(dev)) {
2489 error_mask = ~(GM45_ERROR_PAGE_TABLE |
2490 GM45_ERROR_MEM_PRIV |
2491 GM45_ERROR_CP_PRIV |
2492 I915_ERROR_MEMORY_REFRESH);
2493 } else {
2494 error_mask = ~(I915_ERROR_PAGE_TABLE |
2495 I915_ERROR_MEMORY_REFRESH);
2496 }
2497 I915_WRITE(EMR, error_mask);
2498
2499 I915_WRITE(IMR, dev_priv->irq_mask);
2500 I915_WRITE(IER, enable_mask);
2501 POSTING_READ(IER);
2502
2503 /* Note HDMI and DP share hotplug bits */
2504 hotplug_en = 0;
2505 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2506 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2507 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2508 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2509 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2510 hotplug_en |= HDMID_HOTPLUG_INT_EN;
2511 if (IS_G4X(dev)) {
2512 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_G4X)
2513 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2514 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_G4X)
2515 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2516 } else {
2517 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_I965)
2518 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2519 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I965)
2520 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2521 }
2522 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2523 hotplug_en |= CRT_HOTPLUG_INT_EN;
2524
2525 /* Programming the CRT detection parameters tends
2526 to generate a spurious hotplug event about three
2527 seconds later. So just do it once.
2528 */
2529 if (IS_G4X(dev))
2530 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
2531 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2532 }
2533
2534 /* Ignore TV since it's buggy */
2535
2536 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2537
2538 intel_opregion_enable_asle(dev);
2539
2540 return 0;
2541 }
2542
2543 static irqreturn_t i965_irq_handler(DRM_IRQ_ARGS)
2544 {
2545 struct drm_device *dev = (struct drm_device *) arg;
2546 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2547 u32 iir, new_iir;
2548 u32 pipe_stats[I915_MAX_PIPES];
2549 unsigned long irqflags;
2550 int irq_received;
2551 int ret = IRQ_NONE, pipe;
2552
2553 atomic_inc(&dev_priv->irq_received);
2554
2555 iir = I915_READ(IIR);
2556
2557 for (;;) {
2558 bool blc_event = false;
2559
2560 irq_received = iir != 0;
2561
2562 /* Can't rely on pipestat interrupt bit in iir as it might
2563 * have been cleared after the pipestat interrupt was received.
2564 * It doesn't set the bit in iir again, but it still produces
2565 * interrupts (for non-MSI).
2566 */
2567 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2568 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2569 i915_handle_error(dev, false);
2570
2571 for_each_pipe(pipe) {
2572 int reg = PIPESTAT(pipe);
2573 pipe_stats[pipe] = I915_READ(reg);
2574
2575 /*
2576 * Clear the PIPE*STAT regs before the IIR
2577 */
2578 if (pipe_stats[pipe] & 0x8000ffff) {
2579 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2580 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2581 pipe_name(pipe));
2582 I915_WRITE(reg, pipe_stats[pipe]);
2583 irq_received = 1;
2584 }
2585 }
2586 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2587
2588 if (!irq_received)
2589 break;
2590
2591 ret = IRQ_HANDLED;
2592
2593 /* Consume port. Then clear IIR or we'll miss events */
2594 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
2595 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
2596
2597 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2598 hotplug_status);
2599 if (hotplug_status & dev_priv->hotplug_supported_mask)
2600 queue_work(dev_priv->wq,
2601 &dev_priv->hotplug_work);
2602
2603 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
2604 I915_READ(PORT_HOTPLUG_STAT);
2605 }
2606
2607 I915_WRITE(IIR, iir);
2608 new_iir = I915_READ(IIR); /* Flush posted writes */
2609
2610 if (iir & I915_USER_INTERRUPT)
2611 notify_ring(dev, &dev_priv->ring[RCS]);
2612 if (iir & I915_BSD_USER_INTERRUPT)
2613 notify_ring(dev, &dev_priv->ring[VCS]);
2614
2615 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT)
2616 intel_prepare_page_flip(dev, 0);
2617
2618 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT)
2619 intel_prepare_page_flip(dev, 1);
2620
2621 for_each_pipe(pipe) {
2622 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
2623 drm_handle_vblank(dev, pipe)) {
2624 i915_pageflip_stall_check(dev, pipe);
2625 intel_finish_page_flip(dev, pipe);
2626 }
2627
2628 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
2629 blc_event = true;
2630 }
2631
2632
2633 if (blc_event || (iir & I915_ASLE_INTERRUPT))
2634 intel_opregion_asle_intr(dev);
2635
2636 /* With MSI, interrupts are only generated when iir
2637 * transitions from zero to nonzero. If another bit got
2638 * set while we were handling the existing iir bits, then
2639 * we would never get another interrupt.
2640 *
2641 * This is fine on non-MSI as well, as if we hit this path
2642 * we avoid exiting the interrupt handler only to generate
2643 * another one.
2644 *
2645 * Note that for MSI this could cause a stray interrupt report
2646 * if an interrupt landed in the time between writing IIR and
2647 * the posting read. This should be rare enough to never
2648 * trigger the 99% of 100,000 interrupts test for disabling
2649 * stray interrupts.
2650 */
2651 iir = new_iir;
2652 }
2653
2654 i915_update_dri1_breadcrumb(dev);
2655
2656 return ret;
2657 }
2658
2659 static void i965_irq_uninstall(struct drm_device * dev)
2660 {
2661 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2662 int pipe;
2663
2664 if (!dev_priv)
2665 return;
2666
2667 I915_WRITE(PORT_HOTPLUG_EN, 0);
2668 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2669
2670 I915_WRITE(HWSTAM, 0xffffffff);
2671 for_each_pipe(pipe)
2672 I915_WRITE(PIPESTAT(pipe), 0);
2673 I915_WRITE(IMR, 0xffffffff);
2674 I915_WRITE(IER, 0x0);
2675
2676 for_each_pipe(pipe)
2677 I915_WRITE(PIPESTAT(pipe),
2678 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
2679 I915_WRITE(IIR, I915_READ(IIR));
2680 }
2681
2682 void intel_irq_init(struct drm_device *dev)
2683 {
2684 struct drm_i915_private *dev_priv = dev->dev_private;
2685
2686 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
2687 INIT_WORK(&dev_priv->error_work, i915_error_work_func);
2688 INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
2689 INIT_WORK(&dev_priv->parity_error_work, ivybridge_parity_work);
2690
2691 dev->driver->get_vblank_counter = i915_get_vblank_counter;
2692 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
2693 if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
2694 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
2695 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
2696 }
2697
2698 if (drm_core_check_feature(dev, DRIVER_MODESET))
2699 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
2700 else
2701 dev->driver->get_vblank_timestamp = NULL;
2702 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
2703
2704 if (IS_VALLEYVIEW(dev)) {
2705 dev->driver->irq_handler = valleyview_irq_handler;
2706 dev->driver->irq_preinstall = valleyview_irq_preinstall;
2707 dev->driver->irq_postinstall = valleyview_irq_postinstall;
2708 dev->driver->irq_uninstall = valleyview_irq_uninstall;
2709 dev->driver->enable_vblank = valleyview_enable_vblank;
2710 dev->driver->disable_vblank = valleyview_disable_vblank;
2711 } else if (IS_IVYBRIDGE(dev)) {
2712 /* Share pre & uninstall handlers with ILK/SNB */
2713 dev->driver->irq_handler = ivybridge_irq_handler;
2714 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2715 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
2716 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2717 dev->driver->enable_vblank = ivybridge_enable_vblank;
2718 dev->driver->disable_vblank = ivybridge_disable_vblank;
2719 } else if (IS_HASWELL(dev)) {
2720 /* Share interrupts handling with IVB */
2721 dev->driver->irq_handler = ivybridge_irq_handler;
2722 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2723 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
2724 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2725 dev->driver->enable_vblank = ivybridge_enable_vblank;
2726 dev->driver->disable_vblank = ivybridge_disable_vblank;
2727 } else if (HAS_PCH_SPLIT(dev)) {
2728 dev->driver->irq_handler = ironlake_irq_handler;
2729 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2730 dev->driver->irq_postinstall = ironlake_irq_postinstall;
2731 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2732 dev->driver->enable_vblank = ironlake_enable_vblank;
2733 dev->driver->disable_vblank = ironlake_disable_vblank;
2734 } else {
2735 if (INTEL_INFO(dev)->gen == 2) {
2736 dev->driver->irq_preinstall = i8xx_irq_preinstall;
2737 dev->driver->irq_postinstall = i8xx_irq_postinstall;
2738 dev->driver->irq_handler = i8xx_irq_handler;
2739 dev->driver->irq_uninstall = i8xx_irq_uninstall;
2740 } else if (INTEL_INFO(dev)->gen == 3) {
2741 /* IIR "flip pending" means done if this bit is set */
2742 I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
2743
2744 dev->driver->irq_preinstall = i915_irq_preinstall;
2745 dev->driver->irq_postinstall = i915_irq_postinstall;
2746 dev->driver->irq_uninstall = i915_irq_uninstall;
2747 dev->driver->irq_handler = i915_irq_handler;
2748 } else {
2749 dev->driver->irq_preinstall = i965_irq_preinstall;
2750 dev->driver->irq_postinstall = i965_irq_postinstall;
2751 dev->driver->irq_uninstall = i965_irq_uninstall;
2752 dev->driver->irq_handler = i965_irq_handler;
2753 }
2754 dev->driver->enable_vblank = i915_enable_vblank;
2755 dev->driver->disable_vblank = i915_disable_vblank;
2756 }
2757 }
Linux kernel - Deliverables
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