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Merge tag 'msm-cleanup-for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git...
[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 static void i915_handle_rps_change(struct drm_device *dev)
300 {
301 drm_i915_private_t *dev_priv = dev->dev_private;
302 u32 busy_up, busy_down, max_avg, min_avg;
303 u8 new_delay = dev_priv->cur_delay;
304
305 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
306 busy_up = I915_READ(RCPREVBSYTUPAVG);
307 busy_down = I915_READ(RCPREVBSYTDNAVG);
308 max_avg = I915_READ(RCBMAXAVG);
309 min_avg = I915_READ(RCBMINAVG);
310
311 /* Handle RCS change request from hw */
312 if (busy_up > max_avg) {
313 if (dev_priv->cur_delay != dev_priv->max_delay)
314 new_delay = dev_priv->cur_delay - 1;
315 if (new_delay < dev_priv->max_delay)
316 new_delay = dev_priv->max_delay;
317 } else if (busy_down < min_avg) {
318 if (dev_priv->cur_delay != dev_priv->min_delay)
319 new_delay = dev_priv->cur_delay + 1;
320 if (new_delay > dev_priv->min_delay)
321 new_delay = dev_priv->min_delay;
322 }
323
324 if (ironlake_set_drps(dev, new_delay))
325 dev_priv->cur_delay = new_delay;
326
327 return;
328 }
329
330 static void notify_ring(struct drm_device *dev,
331 struct intel_ring_buffer *ring)
332 {
333 struct drm_i915_private *dev_priv = dev->dev_private;
334
335 if (ring->obj == NULL)
336 return;
337
338 trace_i915_gem_request_complete(ring, ring->get_seqno(ring));
339
340 wake_up_all(&ring->irq_queue);
341 if (i915_enable_hangcheck) {
342 dev_priv->hangcheck_count = 0;
343 mod_timer(&dev_priv->hangcheck_timer,
344 jiffies +
345 msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
346 }
347 }
348
349 static void gen6_pm_rps_work(struct work_struct *work)
350 {
351 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
352 rps_work);
353 u32 pm_iir, pm_imr;
354 u8 new_delay;
355
356 spin_lock_irq(&dev_priv->rps_lock);
357 pm_iir = dev_priv->pm_iir;
358 dev_priv->pm_iir = 0;
359 pm_imr = I915_READ(GEN6_PMIMR);
360 I915_WRITE(GEN6_PMIMR, 0);
361 spin_unlock_irq(&dev_priv->rps_lock);
362
363 if ((pm_iir & GEN6_PM_DEFERRED_EVENTS) == 0)
364 return;
365
366 mutex_lock(&dev_priv->dev->struct_mutex);
367
368 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD)
369 new_delay = dev_priv->cur_delay + 1;
370 else
371 new_delay = dev_priv->cur_delay - 1;
372
373 gen6_set_rps(dev_priv->dev, new_delay);
374
375 mutex_unlock(&dev_priv->dev->struct_mutex);
376 }
377
378
379 /**
380 * ivybridge_parity_work - Workqueue called when a parity error interrupt
381 * occurred.
382 * @work: workqueue struct
383 *
384 * Doesn't actually do anything except notify userspace. As a consequence of
385 * this event, userspace should try to remap the bad rows since statistically
386 * it is likely the same row is more likely to go bad again.
387 */
388 static void ivybridge_parity_work(struct work_struct *work)
389 {
390 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
391 parity_error_work);
392 u32 error_status, row, bank, subbank;
393 char *parity_event[5];
394 uint32_t misccpctl;
395 unsigned long flags;
396
397 /* We must turn off DOP level clock gating to access the L3 registers.
398 * In order to prevent a get/put style interface, acquire struct mutex
399 * any time we access those registers.
400 */
401 mutex_lock(&dev_priv->dev->struct_mutex);
402
403 misccpctl = I915_READ(GEN7_MISCCPCTL);
404 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
405 POSTING_READ(GEN7_MISCCPCTL);
406
407 error_status = I915_READ(GEN7_L3CDERRST1);
408 row = GEN7_PARITY_ERROR_ROW(error_status);
409 bank = GEN7_PARITY_ERROR_BANK(error_status);
410 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
411
412 I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID |
413 GEN7_L3CDERRST1_ENABLE);
414 POSTING_READ(GEN7_L3CDERRST1);
415
416 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
417
418 spin_lock_irqsave(&dev_priv->irq_lock, flags);
419 dev_priv->gt_irq_mask &= ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
420 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
421 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
422
423 mutex_unlock(&dev_priv->dev->struct_mutex);
424
425 parity_event[0] = "L3_PARITY_ERROR=1";
426 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
427 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
428 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
429 parity_event[4] = NULL;
430
431 kobject_uevent_env(&dev_priv->dev->primary->kdev.kobj,
432 KOBJ_CHANGE, parity_event);
433
434 DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
435 row, bank, subbank);
436
437 kfree(parity_event[3]);
438 kfree(parity_event[2]);
439 kfree(parity_event[1]);
440 }
441
442 static void ivybridge_handle_parity_error(struct drm_device *dev)
443 {
444 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
445 unsigned long flags;
446
447 if (!IS_IVYBRIDGE(dev))
448 return;
449
450 spin_lock_irqsave(&dev_priv->irq_lock, flags);
451 dev_priv->gt_irq_mask |= GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
452 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
453 spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
454
455 queue_work(dev_priv->wq, &dev_priv->parity_error_work);
456 }
457
458 static void snb_gt_irq_handler(struct drm_device *dev,
459 struct drm_i915_private *dev_priv,
460 u32 gt_iir)
461 {
462
463 if (gt_iir & (GEN6_RENDER_USER_INTERRUPT |
464 GEN6_RENDER_PIPE_CONTROL_NOTIFY_INTERRUPT))
465 notify_ring(dev, &dev_priv->ring[RCS]);
466 if (gt_iir & GEN6_BSD_USER_INTERRUPT)
467 notify_ring(dev, &dev_priv->ring[VCS]);
468 if (gt_iir & GEN6_BLITTER_USER_INTERRUPT)
469 notify_ring(dev, &dev_priv->ring[BCS]);
470
471 if (gt_iir & (GT_GEN6_BLT_CS_ERROR_INTERRUPT |
472 GT_GEN6_BSD_CS_ERROR_INTERRUPT |
473 GT_RENDER_CS_ERROR_INTERRUPT)) {
474 DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
475 i915_handle_error(dev, false);
476 }
477
478 if (gt_iir & GT_GEN7_L3_PARITY_ERROR_INTERRUPT)
479 ivybridge_handle_parity_error(dev);
480 }
481
482 static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
483 u32 pm_iir)
484 {
485 unsigned long flags;
486
487 /*
488 * IIR bits should never already be set because IMR should
489 * prevent an interrupt from being shown in IIR. The warning
490 * displays a case where we've unsafely cleared
491 * dev_priv->pm_iir. Although missing an interrupt of the same
492 * type is not a problem, it displays a problem in the logic.
493 *
494 * The mask bit in IMR is cleared by rps_work.
495 */
496
497 spin_lock_irqsave(&dev_priv->rps_lock, flags);
498 dev_priv->pm_iir |= pm_iir;
499 I915_WRITE(GEN6_PMIMR, dev_priv->pm_iir);
500 POSTING_READ(GEN6_PMIMR);
501 spin_unlock_irqrestore(&dev_priv->rps_lock, flags);
502
503 queue_work(dev_priv->wq, &dev_priv->rps_work);
504 }
505
506 static irqreturn_t valleyview_irq_handler(DRM_IRQ_ARGS)
507 {
508 struct drm_device *dev = (struct drm_device *) arg;
509 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
510 u32 iir, gt_iir, pm_iir;
511 irqreturn_t ret = IRQ_NONE;
512 unsigned long irqflags;
513 int pipe;
514 u32 pipe_stats[I915_MAX_PIPES];
515 bool blc_event;
516
517 atomic_inc(&dev_priv->irq_received);
518
519 while (true) {
520 iir = I915_READ(VLV_IIR);
521 gt_iir = I915_READ(GTIIR);
522 pm_iir = I915_READ(GEN6_PMIIR);
523
524 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
525 goto out;
526
527 ret = IRQ_HANDLED;
528
529 snb_gt_irq_handler(dev, dev_priv, gt_iir);
530
531 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
532 for_each_pipe(pipe) {
533 int reg = PIPESTAT(pipe);
534 pipe_stats[pipe] = I915_READ(reg);
535
536 /*
537 * Clear the PIPE*STAT regs before the IIR
538 */
539 if (pipe_stats[pipe] & 0x8000ffff) {
540 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
541 DRM_DEBUG_DRIVER("pipe %c underrun\n",
542 pipe_name(pipe));
543 I915_WRITE(reg, pipe_stats[pipe]);
544 }
545 }
546 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
547
548 for_each_pipe(pipe) {
549 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
550 drm_handle_vblank(dev, pipe);
551
552 if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
553 intel_prepare_page_flip(dev, pipe);
554 intel_finish_page_flip(dev, pipe);
555 }
556 }
557
558 /* Consume port. Then clear IIR or we'll miss events */
559 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
560 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
561
562 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
563 hotplug_status);
564 if (hotplug_status & dev_priv->hotplug_supported_mask)
565 queue_work(dev_priv->wq,
566 &dev_priv->hotplug_work);
567
568 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
569 I915_READ(PORT_HOTPLUG_STAT);
570 }
571
572 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
573 blc_event = true;
574
575 if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
576 gen6_queue_rps_work(dev_priv, pm_iir);
577
578 I915_WRITE(GTIIR, gt_iir);
579 I915_WRITE(GEN6_PMIIR, pm_iir);
580 I915_WRITE(VLV_IIR, iir);
581 }
582
583 out:
584 return ret;
585 }
586
587 static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
588 {
589 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
590 int pipe;
591
592 if (pch_iir & SDE_AUDIO_POWER_MASK)
593 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
594 (pch_iir & SDE_AUDIO_POWER_MASK) >>
595 SDE_AUDIO_POWER_SHIFT);
596
597 if (pch_iir & SDE_GMBUS)
598 DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
599
600 if (pch_iir & SDE_AUDIO_HDCP_MASK)
601 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
602
603 if (pch_iir & SDE_AUDIO_TRANS_MASK)
604 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
605
606 if (pch_iir & SDE_POISON)
607 DRM_ERROR("PCH poison interrupt\n");
608
609 if (pch_iir & SDE_FDI_MASK)
610 for_each_pipe(pipe)
611 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
612 pipe_name(pipe),
613 I915_READ(FDI_RX_IIR(pipe)));
614
615 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
616 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
617
618 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
619 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
620
621 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
622 DRM_DEBUG_DRIVER("PCH transcoder B underrun interrupt\n");
623 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
624 DRM_DEBUG_DRIVER("PCH transcoder A underrun interrupt\n");
625 }
626
627 static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
628 {
629 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
630 int pipe;
631
632 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT)
633 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
634 (pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
635 SDE_AUDIO_POWER_SHIFT_CPT);
636
637 if (pch_iir & SDE_AUX_MASK_CPT)
638 DRM_DEBUG_DRIVER("AUX channel interrupt\n");
639
640 if (pch_iir & SDE_GMBUS_CPT)
641 DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
642
643 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
644 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
645
646 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
647 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
648
649 if (pch_iir & SDE_FDI_MASK_CPT)
650 for_each_pipe(pipe)
651 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
652 pipe_name(pipe),
653 I915_READ(FDI_RX_IIR(pipe)));
654 }
655
656 static irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS)
657 {
658 struct drm_device *dev = (struct drm_device *) arg;
659 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
660 u32 de_iir, gt_iir, de_ier, pm_iir;
661 irqreturn_t ret = IRQ_NONE;
662 int i;
663
664 atomic_inc(&dev_priv->irq_received);
665
666 /* disable master interrupt before clearing iir */
667 de_ier = I915_READ(DEIER);
668 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
669
670 gt_iir = I915_READ(GTIIR);
671 if (gt_iir) {
672 snb_gt_irq_handler(dev, dev_priv, gt_iir);
673 I915_WRITE(GTIIR, gt_iir);
674 ret = IRQ_HANDLED;
675 }
676
677 de_iir = I915_READ(DEIIR);
678 if (de_iir) {
679 if (de_iir & DE_GSE_IVB)
680 intel_opregion_gse_intr(dev);
681
682 for (i = 0; i < 3; i++) {
683 if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
684 intel_prepare_page_flip(dev, i);
685 intel_finish_page_flip_plane(dev, i);
686 }
687 if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
688 drm_handle_vblank(dev, i);
689 }
690
691 /* check event from PCH */
692 if (de_iir & DE_PCH_EVENT_IVB) {
693 u32 pch_iir = I915_READ(SDEIIR);
694
695 if (pch_iir & SDE_HOTPLUG_MASK_CPT)
696 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
697 cpt_irq_handler(dev, pch_iir);
698
699 /* clear PCH hotplug event before clear CPU irq */
700 I915_WRITE(SDEIIR, pch_iir);
701 }
702
703 I915_WRITE(DEIIR, de_iir);
704 ret = IRQ_HANDLED;
705 }
706
707 pm_iir = I915_READ(GEN6_PMIIR);
708 if (pm_iir) {
709 if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
710 gen6_queue_rps_work(dev_priv, pm_iir);
711 I915_WRITE(GEN6_PMIIR, pm_iir);
712 ret = IRQ_HANDLED;
713 }
714
715 I915_WRITE(DEIER, de_ier);
716 POSTING_READ(DEIER);
717
718 return ret;
719 }
720
721 static void ilk_gt_irq_handler(struct drm_device *dev,
722 struct drm_i915_private *dev_priv,
723 u32 gt_iir)
724 {
725 if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY))
726 notify_ring(dev, &dev_priv->ring[RCS]);
727 if (gt_iir & GT_BSD_USER_INTERRUPT)
728 notify_ring(dev, &dev_priv->ring[VCS]);
729 }
730
731 static irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS)
732 {
733 struct drm_device *dev = (struct drm_device *) arg;
734 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
735 int ret = IRQ_NONE;
736 u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir;
737 u32 hotplug_mask;
738
739 atomic_inc(&dev_priv->irq_received);
740
741 /* disable master interrupt before clearing iir */
742 de_ier = I915_READ(DEIER);
743 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
744 POSTING_READ(DEIER);
745
746 de_iir = I915_READ(DEIIR);
747 gt_iir = I915_READ(GTIIR);
748 pch_iir = I915_READ(SDEIIR);
749 pm_iir = I915_READ(GEN6_PMIIR);
750
751 if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 &&
752 (!IS_GEN6(dev) || pm_iir == 0))
753 goto done;
754
755 if (HAS_PCH_CPT(dev))
756 hotplug_mask = SDE_HOTPLUG_MASK_CPT;
757 else
758 hotplug_mask = SDE_HOTPLUG_MASK;
759
760 ret = IRQ_HANDLED;
761
762 if (IS_GEN5(dev))
763 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
764 else
765 snb_gt_irq_handler(dev, dev_priv, gt_iir);
766
767 if (de_iir & DE_GSE)
768 intel_opregion_gse_intr(dev);
769
770 if (de_iir & DE_PLANEA_FLIP_DONE) {
771 intel_prepare_page_flip(dev, 0);
772 intel_finish_page_flip_plane(dev, 0);
773 }
774
775 if (de_iir & DE_PLANEB_FLIP_DONE) {
776 intel_prepare_page_flip(dev, 1);
777 intel_finish_page_flip_plane(dev, 1);
778 }
779
780 if (de_iir & DE_PIPEA_VBLANK)
781 drm_handle_vblank(dev, 0);
782
783 if (de_iir & DE_PIPEB_VBLANK)
784 drm_handle_vblank(dev, 1);
785
786 /* check event from PCH */
787 if (de_iir & DE_PCH_EVENT) {
788 if (pch_iir & hotplug_mask)
789 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
790 if (HAS_PCH_CPT(dev))
791 cpt_irq_handler(dev, pch_iir);
792 else
793 ibx_irq_handler(dev, pch_iir);
794 }
795
796 if (de_iir & DE_PCU_EVENT) {
797 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
798 i915_handle_rps_change(dev);
799 }
800
801 if (IS_GEN6(dev) && pm_iir & GEN6_PM_DEFERRED_EVENTS)
802 gen6_queue_rps_work(dev_priv, pm_iir);
803
804 /* should clear PCH hotplug event before clear CPU irq */
805 I915_WRITE(SDEIIR, pch_iir);
806 I915_WRITE(GTIIR, gt_iir);
807 I915_WRITE(DEIIR, de_iir);
808 I915_WRITE(GEN6_PMIIR, pm_iir);
809
810 done:
811 I915_WRITE(DEIER, de_ier);
812 POSTING_READ(DEIER);
813
814 return ret;
815 }
816
817 /**
818 * i915_error_work_func - do process context error handling work
819 * @work: work struct
820 *
821 * Fire an error uevent so userspace can see that a hang or error
822 * was detected.
823 */
824 static void i915_error_work_func(struct work_struct *work)
825 {
826 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
827 error_work);
828 struct drm_device *dev = dev_priv->dev;
829 char *error_event[] = { "ERROR=1", NULL };
830 char *reset_event[] = { "RESET=1", NULL };
831 char *reset_done_event[] = { "ERROR=0", NULL };
832
833 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
834
835 if (atomic_read(&dev_priv->mm.wedged)) {
836 DRM_DEBUG_DRIVER("resetting chip\n");
837 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event);
838 if (!i915_reset(dev)) {
839 atomic_set(&dev_priv->mm.wedged, 0);
840 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event);
841 }
842 complete_all(&dev_priv->error_completion);
843 }
844 }
845
846 #ifdef CONFIG_DEBUG_FS
847 static struct drm_i915_error_object *
848 i915_error_object_create(struct drm_i915_private *dev_priv,
849 struct drm_i915_gem_object *src)
850 {
851 struct drm_i915_error_object *dst;
852 int page, page_count;
853 u32 reloc_offset;
854
855 if (src == NULL || src->pages == NULL)
856 return NULL;
857
858 page_count = src->base.size / PAGE_SIZE;
859
860 dst = kmalloc(sizeof(*dst) + page_count * sizeof(u32 *), GFP_ATOMIC);
861 if (dst == NULL)
862 return NULL;
863
864 reloc_offset = src->gtt_offset;
865 for (page = 0; page < page_count; page++) {
866 unsigned long flags;
867 void *d;
868
869 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
870 if (d == NULL)
871 goto unwind;
872
873 local_irq_save(flags);
874 if (reloc_offset < dev_priv->mm.gtt_mappable_end &&
875 src->has_global_gtt_mapping) {
876 void __iomem *s;
877
878 /* Simply ignore tiling or any overlapping fence.
879 * It's part of the error state, and this hopefully
880 * captures what the GPU read.
881 */
882
883 s = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
884 reloc_offset);
885 memcpy_fromio(d, s, PAGE_SIZE);
886 io_mapping_unmap_atomic(s);
887 } else {
888 void *s;
889
890 drm_clflush_pages(&src->pages[page], 1);
891
892 s = kmap_atomic(src->pages[page]);
893 memcpy(d, s, PAGE_SIZE);
894 kunmap_atomic(s);
895
896 drm_clflush_pages(&src->pages[page], 1);
897 }
898 local_irq_restore(flags);
899
900 dst->pages[page] = d;
901
902 reloc_offset += PAGE_SIZE;
903 }
904 dst->page_count = page_count;
905 dst->gtt_offset = src->gtt_offset;
906
907 return dst;
908
909 unwind:
910 while (page--)
911 kfree(dst->pages[page]);
912 kfree(dst);
913 return NULL;
914 }
915
916 static void
917 i915_error_object_free(struct drm_i915_error_object *obj)
918 {
919 int page;
920
921 if (obj == NULL)
922 return;
923
924 for (page = 0; page < obj->page_count; page++)
925 kfree(obj->pages[page]);
926
927 kfree(obj);
928 }
929
930 void
931 i915_error_state_free(struct kref *error_ref)
932 {
933 struct drm_i915_error_state *error = container_of(error_ref,
934 typeof(*error), ref);
935 int i;
936
937 for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
938 i915_error_object_free(error->ring[i].batchbuffer);
939 i915_error_object_free(error->ring[i].ringbuffer);
940 kfree(error->ring[i].requests);
941 }
942
943 kfree(error->active_bo);
944 kfree(error->overlay);
945 kfree(error);
946 }
947 static void capture_bo(struct drm_i915_error_buffer *err,
948 struct drm_i915_gem_object *obj)
949 {
950 err->size = obj->base.size;
951 err->name = obj->base.name;
952 err->seqno = obj->last_rendering_seqno;
953 err->gtt_offset = obj->gtt_offset;
954 err->read_domains = obj->base.read_domains;
955 err->write_domain = obj->base.write_domain;
956 err->fence_reg = obj->fence_reg;
957 err->pinned = 0;
958 if (obj->pin_count > 0)
959 err->pinned = 1;
960 if (obj->user_pin_count > 0)
961 err->pinned = -1;
962 err->tiling = obj->tiling_mode;
963 err->dirty = obj->dirty;
964 err->purgeable = obj->madv != I915_MADV_WILLNEED;
965 err->ring = obj->ring ? obj->ring->id : -1;
966 err->cache_level = obj->cache_level;
967 }
968
969 static u32 capture_active_bo(struct drm_i915_error_buffer *err,
970 int count, struct list_head *head)
971 {
972 struct drm_i915_gem_object *obj;
973 int i = 0;
974
975 list_for_each_entry(obj, head, mm_list) {
976 capture_bo(err++, obj);
977 if (++i == count)
978 break;
979 }
980
981 return i;
982 }
983
984 static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
985 int count, struct list_head *head)
986 {
987 struct drm_i915_gem_object *obj;
988 int i = 0;
989
990 list_for_each_entry(obj, head, gtt_list) {
991 if (obj->pin_count == 0)
992 continue;
993
994 capture_bo(err++, obj);
995 if (++i == count)
996 break;
997 }
998
999 return i;
1000 }
1001
1002 static void i915_gem_record_fences(struct drm_device *dev,
1003 struct drm_i915_error_state *error)
1004 {
1005 struct drm_i915_private *dev_priv = dev->dev_private;
1006 int i;
1007
1008 /* Fences */
1009 switch (INTEL_INFO(dev)->gen) {
1010 case 7:
1011 case 6:
1012 for (i = 0; i < 16; i++)
1013 error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
1014 break;
1015 case 5:
1016 case 4:
1017 for (i = 0; i < 16; i++)
1018 error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
1019 break;
1020 case 3:
1021 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
1022 for (i = 0; i < 8; i++)
1023 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
1024 case 2:
1025 for (i = 0; i < 8; i++)
1026 error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
1027 break;
1028
1029 }
1030 }
1031
1032 static struct drm_i915_error_object *
1033 i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
1034 struct intel_ring_buffer *ring)
1035 {
1036 struct drm_i915_gem_object *obj;
1037 u32 seqno;
1038
1039 if (!ring->get_seqno)
1040 return NULL;
1041
1042 seqno = ring->get_seqno(ring);
1043 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
1044 if (obj->ring != ring)
1045 continue;
1046
1047 if (i915_seqno_passed(seqno, obj->last_rendering_seqno))
1048 continue;
1049
1050 if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
1051 continue;
1052
1053 /* We need to copy these to an anonymous buffer as the simplest
1054 * method to avoid being overwritten by userspace.
1055 */
1056 return i915_error_object_create(dev_priv, obj);
1057 }
1058
1059 return NULL;
1060 }
1061
1062 static void i915_record_ring_state(struct drm_device *dev,
1063 struct drm_i915_error_state *error,
1064 struct intel_ring_buffer *ring)
1065 {
1066 struct drm_i915_private *dev_priv = dev->dev_private;
1067
1068 if (INTEL_INFO(dev)->gen >= 6) {
1069 error->rc_psmi[ring->id] = I915_READ(ring->mmio_base + 0x50);
1070 error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
1071 error->semaphore_mboxes[ring->id][0]
1072 = I915_READ(RING_SYNC_0(ring->mmio_base));
1073 error->semaphore_mboxes[ring->id][1]
1074 = I915_READ(RING_SYNC_1(ring->mmio_base));
1075 }
1076
1077 if (INTEL_INFO(dev)->gen >= 4) {
1078 error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
1079 error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
1080 error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
1081 error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
1082 error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
1083 if (ring->id == RCS) {
1084 error->instdone1 = I915_READ(INSTDONE1);
1085 error->bbaddr = I915_READ64(BB_ADDR);
1086 }
1087 } else {
1088 error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX);
1089 error->ipeir[ring->id] = I915_READ(IPEIR);
1090 error->ipehr[ring->id] = I915_READ(IPEHR);
1091 error->instdone[ring->id] = I915_READ(INSTDONE);
1092 }
1093
1094 error->waiting[ring->id] = waitqueue_active(&ring->irq_queue);
1095 error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
1096 error->seqno[ring->id] = ring->get_seqno(ring);
1097 error->acthd[ring->id] = intel_ring_get_active_head(ring);
1098 error->head[ring->id] = I915_READ_HEAD(ring);
1099 error->tail[ring->id] = I915_READ_TAIL(ring);
1100
1101 error->cpu_ring_head[ring->id] = ring->head;
1102 error->cpu_ring_tail[ring->id] = ring->tail;
1103 }
1104
1105 static void i915_gem_record_rings(struct drm_device *dev,
1106 struct drm_i915_error_state *error)
1107 {
1108 struct drm_i915_private *dev_priv = dev->dev_private;
1109 struct intel_ring_buffer *ring;
1110 struct drm_i915_gem_request *request;
1111 int i, count;
1112
1113 for_each_ring(ring, dev_priv, i) {
1114 i915_record_ring_state(dev, error, ring);
1115
1116 error->ring[i].batchbuffer =
1117 i915_error_first_batchbuffer(dev_priv, ring);
1118
1119 error->ring[i].ringbuffer =
1120 i915_error_object_create(dev_priv, ring->obj);
1121
1122 count = 0;
1123 list_for_each_entry(request, &ring->request_list, list)
1124 count++;
1125
1126 error->ring[i].num_requests = count;
1127 error->ring[i].requests =
1128 kmalloc(count*sizeof(struct drm_i915_error_request),
1129 GFP_ATOMIC);
1130 if (error->ring[i].requests == NULL) {
1131 error->ring[i].num_requests = 0;
1132 continue;
1133 }
1134
1135 count = 0;
1136 list_for_each_entry(request, &ring->request_list, list) {
1137 struct drm_i915_error_request *erq;
1138
1139 erq = &error->ring[i].requests[count++];
1140 erq->seqno = request->seqno;
1141 erq->jiffies = request->emitted_jiffies;
1142 erq->tail = request->tail;
1143 }
1144 }
1145 }
1146
1147 /**
1148 * i915_capture_error_state - capture an error record for later analysis
1149 * @dev: drm device
1150 *
1151 * Should be called when an error is detected (either a hang or an error
1152 * interrupt) to capture error state from the time of the error. Fills
1153 * out a structure which becomes available in debugfs for user level tools
1154 * to pick up.
1155 */
1156 static void i915_capture_error_state(struct drm_device *dev)
1157 {
1158 struct drm_i915_private *dev_priv = dev->dev_private;
1159 struct drm_i915_gem_object *obj;
1160 struct drm_i915_error_state *error;
1161 unsigned long flags;
1162 int i, pipe;
1163
1164 spin_lock_irqsave(&dev_priv->error_lock, flags);
1165 error = dev_priv->first_error;
1166 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1167 if (error)
1168 return;
1169
1170 /* Account for pipe specific data like PIPE*STAT */
1171 error = kzalloc(sizeof(*error), GFP_ATOMIC);
1172 if (!error) {
1173 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
1174 return;
1175 }
1176
1177 DRM_INFO("capturing error event; look for more information in /debug/dri/%d/i915_error_state\n",
1178 dev->primary->index);
1179
1180 kref_init(&error->ref);
1181 error->eir = I915_READ(EIR);
1182 error->pgtbl_er = I915_READ(PGTBL_ER);
1183 error->ccid = I915_READ(CCID);
1184
1185 if (HAS_PCH_SPLIT(dev))
1186 error->ier = I915_READ(DEIER) | I915_READ(GTIER);
1187 else if (IS_VALLEYVIEW(dev))
1188 error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
1189 else if (IS_GEN2(dev))
1190 error->ier = I915_READ16(IER);
1191 else
1192 error->ier = I915_READ(IER);
1193
1194 for_each_pipe(pipe)
1195 error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
1196
1197 if (INTEL_INFO(dev)->gen >= 6) {
1198 error->error = I915_READ(ERROR_GEN6);
1199 error->done_reg = I915_READ(DONE_REG);
1200 }
1201
1202 i915_gem_record_fences(dev, error);
1203 i915_gem_record_rings(dev, error);
1204
1205 /* Record buffers on the active and pinned lists. */
1206 error->active_bo = NULL;
1207 error->pinned_bo = NULL;
1208
1209 i = 0;
1210 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
1211 i++;
1212 error->active_bo_count = i;
1213 list_for_each_entry(obj, &dev_priv->mm.gtt_list, gtt_list)
1214 if (obj->pin_count)
1215 i++;
1216 error->pinned_bo_count = i - error->active_bo_count;
1217
1218 error->active_bo = NULL;
1219 error->pinned_bo = NULL;
1220 if (i) {
1221 error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
1222 GFP_ATOMIC);
1223 if (error->active_bo)
1224 error->pinned_bo =
1225 error->active_bo + error->active_bo_count;
1226 }
1227
1228 if (error->active_bo)
1229 error->active_bo_count =
1230 capture_active_bo(error->active_bo,
1231 error->active_bo_count,
1232 &dev_priv->mm.active_list);
1233
1234 if (error->pinned_bo)
1235 error->pinned_bo_count =
1236 capture_pinned_bo(error->pinned_bo,
1237 error->pinned_bo_count,
1238 &dev_priv->mm.gtt_list);
1239
1240 do_gettimeofday(&error->time);
1241
1242 error->overlay = intel_overlay_capture_error_state(dev);
1243 error->display = intel_display_capture_error_state(dev);
1244
1245 spin_lock_irqsave(&dev_priv->error_lock, flags);
1246 if (dev_priv->first_error == NULL) {
1247 dev_priv->first_error = error;
1248 error = NULL;
1249 }
1250 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1251
1252 if (error)
1253 i915_error_state_free(&error->ref);
1254 }
1255
1256 void i915_destroy_error_state(struct drm_device *dev)
1257 {
1258 struct drm_i915_private *dev_priv = dev->dev_private;
1259 struct drm_i915_error_state *error;
1260 unsigned long flags;
1261
1262 spin_lock_irqsave(&dev_priv->error_lock, flags);
1263 error = dev_priv->first_error;
1264 dev_priv->first_error = NULL;
1265 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1266
1267 if (error)
1268 kref_put(&error->ref, i915_error_state_free);
1269 }
1270 #else
1271 #define i915_capture_error_state(x)
1272 #endif
1273
1274 static void i915_report_and_clear_eir(struct drm_device *dev)
1275 {
1276 struct drm_i915_private *dev_priv = dev->dev_private;
1277 u32 eir = I915_READ(EIR);
1278 int pipe;
1279
1280 if (!eir)
1281 return;
1282
1283 pr_err("render error detected, EIR: 0x%08x\n", eir);
1284
1285 if (IS_G4X(dev)) {
1286 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
1287 u32 ipeir = I915_READ(IPEIR_I965);
1288
1289 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
1290 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
1291 pr_err(" INSTDONE: 0x%08x\n",
1292 I915_READ(INSTDONE_I965));
1293 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
1294 pr_err(" INSTDONE1: 0x%08x\n", I915_READ(INSTDONE1));
1295 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
1296 I915_WRITE(IPEIR_I965, ipeir);
1297 POSTING_READ(IPEIR_I965);
1298 }
1299 if (eir & GM45_ERROR_PAGE_TABLE) {
1300 u32 pgtbl_err = I915_READ(PGTBL_ER);
1301 pr_err("page table error\n");
1302 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
1303 I915_WRITE(PGTBL_ER, pgtbl_err);
1304 POSTING_READ(PGTBL_ER);
1305 }
1306 }
1307
1308 if (!IS_GEN2(dev)) {
1309 if (eir & I915_ERROR_PAGE_TABLE) {
1310 u32 pgtbl_err = I915_READ(PGTBL_ER);
1311 pr_err("page table error\n");
1312 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
1313 I915_WRITE(PGTBL_ER, pgtbl_err);
1314 POSTING_READ(PGTBL_ER);
1315 }
1316 }
1317
1318 if (eir & I915_ERROR_MEMORY_REFRESH) {
1319 pr_err("memory refresh error:\n");
1320 for_each_pipe(pipe)
1321 pr_err("pipe %c stat: 0x%08x\n",
1322 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
1323 /* pipestat has already been acked */
1324 }
1325 if (eir & I915_ERROR_INSTRUCTION) {
1326 pr_err("instruction error\n");
1327 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
1328 if (INTEL_INFO(dev)->gen < 4) {
1329 u32 ipeir = I915_READ(IPEIR);
1330
1331 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
1332 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
1333 pr_err(" INSTDONE: 0x%08x\n", I915_READ(INSTDONE));
1334 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
1335 I915_WRITE(IPEIR, ipeir);
1336 POSTING_READ(IPEIR);
1337 } else {
1338 u32 ipeir = I915_READ(IPEIR_I965);
1339
1340 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
1341 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
1342 pr_err(" INSTDONE: 0x%08x\n",
1343 I915_READ(INSTDONE_I965));
1344 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
1345 pr_err(" INSTDONE1: 0x%08x\n", I915_READ(INSTDONE1));
1346 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
1347 I915_WRITE(IPEIR_I965, ipeir);
1348 POSTING_READ(IPEIR_I965);
1349 }
1350 }
1351
1352 I915_WRITE(EIR, eir);
1353 POSTING_READ(EIR);
1354 eir = I915_READ(EIR);
1355 if (eir) {
1356 /*
1357 * some errors might have become stuck,
1358 * mask them.
1359 */
1360 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
1361 I915_WRITE(EMR, I915_READ(EMR) | eir);
1362 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
1363 }
1364 }
1365
1366 /**
1367 * i915_handle_error - handle an error interrupt
1368 * @dev: drm device
1369 *
1370 * Do some basic checking of regsiter state at error interrupt time and
1371 * dump it to the syslog. Also call i915_capture_error_state() to make
1372 * sure we get a record and make it available in debugfs. Fire a uevent
1373 * so userspace knows something bad happened (should trigger collection
1374 * of a ring dump etc.).
1375 */
1376 void i915_handle_error(struct drm_device *dev, bool wedged)
1377 {
1378 struct drm_i915_private *dev_priv = dev->dev_private;
1379 struct intel_ring_buffer *ring;
1380 int i;
1381
1382 i915_capture_error_state(dev);
1383 i915_report_and_clear_eir(dev);
1384
1385 if (wedged) {
1386 INIT_COMPLETION(dev_priv->error_completion);
1387 atomic_set(&dev_priv->mm.wedged, 1);
1388
1389 /*
1390 * Wakeup waiting processes so they don't hang
1391 */
1392 for_each_ring(ring, dev_priv, i)
1393 wake_up_all(&ring->irq_queue);
1394 }
1395
1396 queue_work(dev_priv->wq, &dev_priv->error_work);
1397 }
1398
1399 static void i915_pageflip_stall_check(struct drm_device *dev, int pipe)
1400 {
1401 drm_i915_private_t *dev_priv = dev->dev_private;
1402 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1403 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1404 struct drm_i915_gem_object *obj;
1405 struct intel_unpin_work *work;
1406 unsigned long flags;
1407 bool stall_detected;
1408
1409 /* Ignore early vblank irqs */
1410 if (intel_crtc == NULL)
1411 return;
1412
1413 spin_lock_irqsave(&dev->event_lock, flags);
1414 work = intel_crtc->unpin_work;
1415
1416 if (work == NULL || work->pending || !work->enable_stall_check) {
1417 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
1418 spin_unlock_irqrestore(&dev->event_lock, flags);
1419 return;
1420 }
1421
1422 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
1423 obj = work->pending_flip_obj;
1424 if (INTEL_INFO(dev)->gen >= 4) {
1425 int dspsurf = DSPSURF(intel_crtc->plane);
1426 stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
1427 obj->gtt_offset;
1428 } else {
1429 int dspaddr = DSPADDR(intel_crtc->plane);
1430 stall_detected = I915_READ(dspaddr) == (obj->gtt_offset +
1431 crtc->y * crtc->fb->pitches[0] +
1432 crtc->x * crtc->fb->bits_per_pixel/8);
1433 }
1434
1435 spin_unlock_irqrestore(&dev->event_lock, flags);
1436
1437 if (stall_detected) {
1438 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
1439 intel_prepare_page_flip(dev, intel_crtc->plane);
1440 }
1441 }
1442
1443 /* Called from drm generic code, passed 'crtc' which
1444 * we use as a pipe index
1445 */
1446 static int i915_enable_vblank(struct drm_device *dev, int pipe)
1447 {
1448 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1449 unsigned long irqflags;
1450
1451 if (!i915_pipe_enabled(dev, pipe))
1452 return -EINVAL;
1453
1454 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1455 if (INTEL_INFO(dev)->gen >= 4)
1456 i915_enable_pipestat(dev_priv, pipe,
1457 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1458 else
1459 i915_enable_pipestat(dev_priv, pipe,
1460 PIPE_VBLANK_INTERRUPT_ENABLE);
1461
1462 /* maintain vblank delivery even in deep C-states */
1463 if (dev_priv->info->gen == 3)
1464 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
1465 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1466
1467 return 0;
1468 }
1469
1470 static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
1471 {
1472 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1473 unsigned long irqflags;
1474
1475 if (!i915_pipe_enabled(dev, pipe))
1476 return -EINVAL;
1477
1478 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1479 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
1480 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
1481 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1482
1483 return 0;
1484 }
1485
1486 static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
1487 {
1488 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1489 unsigned long irqflags;
1490
1491 if (!i915_pipe_enabled(dev, pipe))
1492 return -EINVAL;
1493
1494 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1495 ironlake_enable_display_irq(dev_priv,
1496 DE_PIPEA_VBLANK_IVB << (5 * pipe));
1497 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1498
1499 return 0;
1500 }
1501
1502 static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
1503 {
1504 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1505 unsigned long irqflags;
1506 u32 imr;
1507
1508 if (!i915_pipe_enabled(dev, pipe))
1509 return -EINVAL;
1510
1511 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1512 imr = I915_READ(VLV_IMR);
1513 if (pipe == 0)
1514 imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
1515 else
1516 imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1517 I915_WRITE(VLV_IMR, imr);
1518 i915_enable_pipestat(dev_priv, pipe,
1519 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1520 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1521
1522 return 0;
1523 }
1524
1525 /* Called from drm generic code, passed 'crtc' which
1526 * we use as a pipe index
1527 */
1528 static void i915_disable_vblank(struct drm_device *dev, int pipe)
1529 {
1530 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1531 unsigned long irqflags;
1532
1533 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1534 if (dev_priv->info->gen == 3)
1535 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
1536
1537 i915_disable_pipestat(dev_priv, pipe,
1538 PIPE_VBLANK_INTERRUPT_ENABLE |
1539 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1540 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1541 }
1542
1543 static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
1544 {
1545 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1546 unsigned long irqflags;
1547
1548 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1549 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
1550 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
1551 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1552 }
1553
1554 static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
1555 {
1556 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1557 unsigned long irqflags;
1558
1559 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1560 ironlake_disable_display_irq(dev_priv,
1561 DE_PIPEA_VBLANK_IVB << (pipe * 5));
1562 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1563 }
1564
1565 static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
1566 {
1567 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1568 unsigned long irqflags;
1569 u32 imr;
1570
1571 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1572 i915_disable_pipestat(dev_priv, pipe,
1573 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1574 imr = I915_READ(VLV_IMR);
1575 if (pipe == 0)
1576 imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
1577 else
1578 imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1579 I915_WRITE(VLV_IMR, imr);
1580 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1581 }
1582
1583 static u32
1584 ring_last_seqno(struct intel_ring_buffer *ring)
1585 {
1586 return list_entry(ring->request_list.prev,
1587 struct drm_i915_gem_request, list)->seqno;
1588 }
1589
1590 static bool i915_hangcheck_ring_idle(struct intel_ring_buffer *ring, bool *err)
1591 {
1592 if (list_empty(&ring->request_list) ||
1593 i915_seqno_passed(ring->get_seqno(ring), ring_last_seqno(ring))) {
1594 /* Issue a wake-up to catch stuck h/w. */
1595 if (waitqueue_active(&ring->irq_queue)) {
1596 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
1597 ring->name);
1598 wake_up_all(&ring->irq_queue);
1599 *err = true;
1600 }
1601 return true;
1602 }
1603 return false;
1604 }
1605
1606 static bool kick_ring(struct intel_ring_buffer *ring)
1607 {
1608 struct drm_device *dev = ring->dev;
1609 struct drm_i915_private *dev_priv = dev->dev_private;
1610 u32 tmp = I915_READ_CTL(ring);
1611 if (tmp & RING_WAIT) {
1612 DRM_ERROR("Kicking stuck wait on %s\n",
1613 ring->name);
1614 I915_WRITE_CTL(ring, tmp);
1615 return true;
1616 }
1617 return false;
1618 }
1619
1620 static bool i915_hangcheck_hung(struct drm_device *dev)
1621 {
1622 drm_i915_private_t *dev_priv = dev->dev_private;
1623
1624 if (dev_priv->hangcheck_count++ > 1) {
1625 bool hung = true;
1626
1627 DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
1628 i915_handle_error(dev, true);
1629
1630 if (!IS_GEN2(dev)) {
1631 struct intel_ring_buffer *ring;
1632 int i;
1633
1634 /* Is the chip hanging on a WAIT_FOR_EVENT?
1635 * If so we can simply poke the RB_WAIT bit
1636 * and break the hang. This should work on
1637 * all but the second generation chipsets.
1638 */
1639 for_each_ring(ring, dev_priv, i)
1640 hung &= !kick_ring(ring);
1641 }
1642
1643 return hung;
1644 }
1645
1646 return false;
1647 }
1648
1649 /**
1650 * This is called when the chip hasn't reported back with completed
1651 * batchbuffers in a long time. The first time this is called we simply record
1652 * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses
1653 * again, we assume the chip is wedged and try to fix it.
1654 */
1655 void i915_hangcheck_elapsed(unsigned long data)
1656 {
1657 struct drm_device *dev = (struct drm_device *)data;
1658 drm_i915_private_t *dev_priv = dev->dev_private;
1659 uint32_t acthd[I915_NUM_RINGS], instdone, instdone1;
1660 struct intel_ring_buffer *ring;
1661 bool err = false, idle;
1662 int i;
1663
1664 if (!i915_enable_hangcheck)
1665 return;
1666
1667 memset(acthd, 0, sizeof(acthd));
1668 idle = true;
1669 for_each_ring(ring, dev_priv, i) {
1670 idle &= i915_hangcheck_ring_idle(ring, &err);
1671 acthd[i] = intel_ring_get_active_head(ring);
1672 }
1673
1674 /* If all work is done then ACTHD clearly hasn't advanced. */
1675 if (idle) {
1676 if (err) {
1677 if (i915_hangcheck_hung(dev))
1678 return;
1679
1680 goto repeat;
1681 }
1682
1683 dev_priv->hangcheck_count = 0;
1684 return;
1685 }
1686
1687 if (INTEL_INFO(dev)->gen < 4) {
1688 instdone = I915_READ(INSTDONE);
1689 instdone1 = 0;
1690 } else {
1691 instdone = I915_READ(INSTDONE_I965);
1692 instdone1 = I915_READ(INSTDONE1);
1693 }
1694
1695 if (memcmp(dev_priv->last_acthd, acthd, sizeof(acthd)) == 0 &&
1696 dev_priv->last_instdone == instdone &&
1697 dev_priv->last_instdone1 == instdone1) {
1698 if (i915_hangcheck_hung(dev))
1699 return;
1700 } else {
1701 dev_priv->hangcheck_count = 0;
1702
1703 memcpy(dev_priv->last_acthd, acthd, sizeof(acthd));
1704 dev_priv->last_instdone = instdone;
1705 dev_priv->last_instdone1 = instdone1;
1706 }
1707
1708 repeat:
1709 /* Reset timer case chip hangs without another request being added */
1710 mod_timer(&dev_priv->hangcheck_timer,
1711 jiffies + msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
1712 }
1713
1714 /* drm_dma.h hooks
1715 */
1716 static void ironlake_irq_preinstall(struct drm_device *dev)
1717 {
1718 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1719
1720 atomic_set(&dev_priv->irq_received, 0);
1721
1722 I915_WRITE(HWSTAM, 0xeffe);
1723
1724 /* XXX hotplug from PCH */
1725
1726 I915_WRITE(DEIMR, 0xffffffff);
1727 I915_WRITE(DEIER, 0x0);
1728 POSTING_READ(DEIER);
1729
1730 /* and GT */
1731 I915_WRITE(GTIMR, 0xffffffff);
1732 I915_WRITE(GTIER, 0x0);
1733 POSTING_READ(GTIER);
1734
1735 /* south display irq */
1736 I915_WRITE(SDEIMR, 0xffffffff);
1737 I915_WRITE(SDEIER, 0x0);
1738 POSTING_READ(SDEIER);
1739 }
1740
1741 static void valleyview_irq_preinstall(struct drm_device *dev)
1742 {
1743 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1744 int pipe;
1745
1746 atomic_set(&dev_priv->irq_received, 0);
1747
1748 /* VLV magic */
1749 I915_WRITE(VLV_IMR, 0);
1750 I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
1751 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
1752 I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
1753
1754 /* and GT */
1755 I915_WRITE(GTIIR, I915_READ(GTIIR));
1756 I915_WRITE(GTIIR, I915_READ(GTIIR));
1757 I915_WRITE(GTIMR, 0xffffffff);
1758 I915_WRITE(GTIER, 0x0);
1759 POSTING_READ(GTIER);
1760
1761 I915_WRITE(DPINVGTT, 0xff);
1762
1763 I915_WRITE(PORT_HOTPLUG_EN, 0);
1764 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
1765 for_each_pipe(pipe)
1766 I915_WRITE(PIPESTAT(pipe), 0xffff);
1767 I915_WRITE(VLV_IIR, 0xffffffff);
1768 I915_WRITE(VLV_IMR, 0xffffffff);
1769 I915_WRITE(VLV_IER, 0x0);
1770 POSTING_READ(VLV_IER);
1771 }
1772
1773 /*
1774 * Enable digital hotplug on the PCH, and configure the DP short pulse
1775 * duration to 2ms (which is the minimum in the Display Port spec)
1776 *
1777 * This register is the same on all known PCH chips.
1778 */
1779
1780 static void ironlake_enable_pch_hotplug(struct drm_device *dev)
1781 {
1782 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1783 u32 hotplug;
1784
1785 hotplug = I915_READ(PCH_PORT_HOTPLUG);
1786 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
1787 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
1788 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
1789 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
1790 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
1791 }
1792
1793 static int ironlake_irq_postinstall(struct drm_device *dev)
1794 {
1795 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1796 /* enable kind of interrupts always enabled */
1797 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
1798 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE;
1799 u32 render_irqs;
1800 u32 hotplug_mask;
1801
1802 dev_priv->irq_mask = ~display_mask;
1803
1804 /* should always can generate irq */
1805 I915_WRITE(DEIIR, I915_READ(DEIIR));
1806 I915_WRITE(DEIMR, dev_priv->irq_mask);
1807 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK);
1808 POSTING_READ(DEIER);
1809
1810 dev_priv->gt_irq_mask = ~0;
1811
1812 I915_WRITE(GTIIR, I915_READ(GTIIR));
1813 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1814
1815 if (IS_GEN6(dev))
1816 render_irqs =
1817 GT_USER_INTERRUPT |
1818 GEN6_BSD_USER_INTERRUPT |
1819 GEN6_BLITTER_USER_INTERRUPT;
1820 else
1821 render_irqs =
1822 GT_USER_INTERRUPT |
1823 GT_PIPE_NOTIFY |
1824 GT_BSD_USER_INTERRUPT;
1825 I915_WRITE(GTIER, render_irqs);
1826 POSTING_READ(GTIER);
1827
1828 if (HAS_PCH_CPT(dev)) {
1829 hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1830 SDE_PORTB_HOTPLUG_CPT |
1831 SDE_PORTC_HOTPLUG_CPT |
1832 SDE_PORTD_HOTPLUG_CPT);
1833 } else {
1834 hotplug_mask = (SDE_CRT_HOTPLUG |
1835 SDE_PORTB_HOTPLUG |
1836 SDE_PORTC_HOTPLUG |
1837 SDE_PORTD_HOTPLUG |
1838 SDE_AUX_MASK);
1839 }
1840
1841 dev_priv->pch_irq_mask = ~hotplug_mask;
1842
1843 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1844 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
1845 I915_WRITE(SDEIER, hotplug_mask);
1846 POSTING_READ(SDEIER);
1847
1848 ironlake_enable_pch_hotplug(dev);
1849
1850 if (IS_IRONLAKE_M(dev)) {
1851 /* Clear & enable PCU event interrupts */
1852 I915_WRITE(DEIIR, DE_PCU_EVENT);
1853 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
1854 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
1855 }
1856
1857 return 0;
1858 }
1859
1860 static int ivybridge_irq_postinstall(struct drm_device *dev)
1861 {
1862 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1863 /* enable kind of interrupts always enabled */
1864 u32 display_mask =
1865 DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | DE_PCH_EVENT_IVB |
1866 DE_PLANEC_FLIP_DONE_IVB |
1867 DE_PLANEB_FLIP_DONE_IVB |
1868 DE_PLANEA_FLIP_DONE_IVB;
1869 u32 render_irqs;
1870 u32 hotplug_mask;
1871
1872 dev_priv->irq_mask = ~display_mask;
1873
1874 /* should always can generate irq */
1875 I915_WRITE(DEIIR, I915_READ(DEIIR));
1876 I915_WRITE(DEIMR, dev_priv->irq_mask);
1877 I915_WRITE(DEIER,
1878 display_mask |
1879 DE_PIPEC_VBLANK_IVB |
1880 DE_PIPEB_VBLANK_IVB |
1881 DE_PIPEA_VBLANK_IVB);
1882 POSTING_READ(DEIER);
1883
1884 dev_priv->gt_irq_mask = ~GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
1885
1886 I915_WRITE(GTIIR, I915_READ(GTIIR));
1887 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1888
1889 render_irqs = GT_USER_INTERRUPT | GEN6_BSD_USER_INTERRUPT |
1890 GEN6_BLITTER_USER_INTERRUPT | GT_GEN7_L3_PARITY_ERROR_INTERRUPT;
1891 I915_WRITE(GTIER, render_irqs);
1892 POSTING_READ(GTIER);
1893
1894 hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1895 SDE_PORTB_HOTPLUG_CPT |
1896 SDE_PORTC_HOTPLUG_CPT |
1897 SDE_PORTD_HOTPLUG_CPT);
1898 dev_priv->pch_irq_mask = ~hotplug_mask;
1899
1900 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1901 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
1902 I915_WRITE(SDEIER, hotplug_mask);
1903 POSTING_READ(SDEIER);
1904
1905 ironlake_enable_pch_hotplug(dev);
1906
1907 return 0;
1908 }
1909
1910 static int valleyview_irq_postinstall(struct drm_device *dev)
1911 {
1912 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1913 u32 enable_mask;
1914 u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
1915 u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV;
1916 u16 msid;
1917
1918 enable_mask = I915_DISPLAY_PORT_INTERRUPT;
1919 enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
1920 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
1921 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
1922 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1923
1924 /*
1925 *Leave vblank interrupts masked initially. enable/disable will
1926 * toggle them based on usage.
1927 */
1928 dev_priv->irq_mask = (~enable_mask) |
1929 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
1930 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
1931
1932 dev_priv->pipestat[0] = 0;
1933 dev_priv->pipestat[1] = 0;
1934
1935 /* Hack for broken MSIs on VLV */
1936 pci_write_config_dword(dev_priv->dev->pdev, 0x94, 0xfee00000);
1937 pci_read_config_word(dev->pdev, 0x98, &msid);
1938 msid &= 0xff; /* mask out delivery bits */
1939 msid |= (1<<14);
1940 pci_write_config_word(dev_priv->dev->pdev, 0x98, msid);
1941
1942 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
1943 I915_WRITE(VLV_IER, enable_mask);
1944 I915_WRITE(VLV_IIR, 0xffffffff);
1945 I915_WRITE(PIPESTAT(0), 0xffff);
1946 I915_WRITE(PIPESTAT(1), 0xffff);
1947 POSTING_READ(VLV_IER);
1948
1949 i915_enable_pipestat(dev_priv, 0, pipestat_enable);
1950 i915_enable_pipestat(dev_priv, 1, pipestat_enable);
1951
1952 I915_WRITE(VLV_IIR, 0xffffffff);
1953 I915_WRITE(VLV_IIR, 0xffffffff);
1954
1955 dev_priv->gt_irq_mask = ~0;
1956
1957 I915_WRITE(GTIIR, I915_READ(GTIIR));
1958 I915_WRITE(GTIIR, I915_READ(GTIIR));
1959 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1960 I915_WRITE(GTIER, GT_GEN6_BLT_FLUSHDW_NOTIFY_INTERRUPT |
1961 GT_GEN6_BLT_CS_ERROR_INTERRUPT |
1962 GT_GEN6_BLT_USER_INTERRUPT |
1963 GT_GEN6_BSD_USER_INTERRUPT |
1964 GT_GEN6_BSD_CS_ERROR_INTERRUPT |
1965 GT_GEN7_L3_PARITY_ERROR_INTERRUPT |
1966 GT_PIPE_NOTIFY |
1967 GT_RENDER_CS_ERROR_INTERRUPT |
1968 GT_SYNC_STATUS |
1969 GT_USER_INTERRUPT);
1970 POSTING_READ(GTIER);
1971
1972 /* ack & enable invalid PTE error interrupts */
1973 #if 0 /* FIXME: add support to irq handler for checking these bits */
1974 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
1975 I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
1976 #endif
1977
1978 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
1979 #if 0 /* FIXME: check register definitions; some have moved */
1980 /* Note HDMI and DP share bits */
1981 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
1982 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
1983 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
1984 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
1985 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
1986 hotplug_en |= HDMID_HOTPLUG_INT_EN;
1987 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
1988 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
1989 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
1990 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
1991 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
1992 hotplug_en |= CRT_HOTPLUG_INT_EN;
1993 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
1994 }
1995 #endif
1996
1997 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
1998
1999 return 0;
2000 }
2001
2002 static void valleyview_irq_uninstall(struct drm_device *dev)
2003 {
2004 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2005 int pipe;
2006
2007 if (!dev_priv)
2008 return;
2009
2010 for_each_pipe(pipe)
2011 I915_WRITE(PIPESTAT(pipe), 0xffff);
2012
2013 I915_WRITE(HWSTAM, 0xffffffff);
2014 I915_WRITE(PORT_HOTPLUG_EN, 0);
2015 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2016 for_each_pipe(pipe)
2017 I915_WRITE(PIPESTAT(pipe), 0xffff);
2018 I915_WRITE(VLV_IIR, 0xffffffff);
2019 I915_WRITE(VLV_IMR, 0xffffffff);
2020 I915_WRITE(VLV_IER, 0x0);
2021 POSTING_READ(VLV_IER);
2022 }
2023
2024 static void ironlake_irq_uninstall(struct drm_device *dev)
2025 {
2026 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2027
2028 if (!dev_priv)
2029 return;
2030
2031 I915_WRITE(HWSTAM, 0xffffffff);
2032
2033 I915_WRITE(DEIMR, 0xffffffff);
2034 I915_WRITE(DEIER, 0x0);
2035 I915_WRITE(DEIIR, I915_READ(DEIIR));
2036
2037 I915_WRITE(GTIMR, 0xffffffff);
2038 I915_WRITE(GTIER, 0x0);
2039 I915_WRITE(GTIIR, I915_READ(GTIIR));
2040
2041 I915_WRITE(SDEIMR, 0xffffffff);
2042 I915_WRITE(SDEIER, 0x0);
2043 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2044 }
2045
2046 static void i8xx_irq_preinstall(struct drm_device * dev)
2047 {
2048 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2049 int pipe;
2050
2051 atomic_set(&dev_priv->irq_received, 0);
2052
2053 for_each_pipe(pipe)
2054 I915_WRITE(PIPESTAT(pipe), 0);
2055 I915_WRITE16(IMR, 0xffff);
2056 I915_WRITE16(IER, 0x0);
2057 POSTING_READ16(IER);
2058 }
2059
2060 static int i8xx_irq_postinstall(struct drm_device *dev)
2061 {
2062 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2063
2064 dev_priv->pipestat[0] = 0;
2065 dev_priv->pipestat[1] = 0;
2066
2067 I915_WRITE16(EMR,
2068 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2069
2070 /* Unmask the interrupts that we always want on. */
2071 dev_priv->irq_mask =
2072 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2073 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2074 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2075 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2076 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2077 I915_WRITE16(IMR, dev_priv->irq_mask);
2078
2079 I915_WRITE16(IER,
2080 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2081 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2082 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2083 I915_USER_INTERRUPT);
2084 POSTING_READ16(IER);
2085
2086 return 0;
2087 }
2088
2089 static irqreturn_t i8xx_irq_handler(DRM_IRQ_ARGS)
2090 {
2091 struct drm_device *dev = (struct drm_device *) arg;
2092 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2093 u16 iir, new_iir;
2094 u32 pipe_stats[2];
2095 unsigned long irqflags;
2096 int irq_received;
2097 int pipe;
2098 u16 flip_mask =
2099 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2100 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2101
2102 atomic_inc(&dev_priv->irq_received);
2103
2104 iir = I915_READ16(IIR);
2105 if (iir == 0)
2106 return IRQ_NONE;
2107
2108 while (iir & ~flip_mask) {
2109 /* Can't rely on pipestat interrupt bit in iir as it might
2110 * have been cleared after the pipestat interrupt was received.
2111 * It doesn't set the bit in iir again, but it still produces
2112 * interrupts (for non-MSI).
2113 */
2114 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2115 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2116 i915_handle_error(dev, false);
2117
2118 for_each_pipe(pipe) {
2119 int reg = PIPESTAT(pipe);
2120 pipe_stats[pipe] = I915_READ(reg);
2121
2122 /*
2123 * Clear the PIPE*STAT regs before the IIR
2124 */
2125 if (pipe_stats[pipe] & 0x8000ffff) {
2126 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2127 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2128 pipe_name(pipe));
2129 I915_WRITE(reg, pipe_stats[pipe]);
2130 irq_received = 1;
2131 }
2132 }
2133 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2134
2135 I915_WRITE16(IIR, iir & ~flip_mask);
2136 new_iir = I915_READ16(IIR); /* Flush posted writes */
2137
2138 i915_update_dri1_breadcrumb(dev);
2139
2140 if (iir & I915_USER_INTERRUPT)
2141 notify_ring(dev, &dev_priv->ring[RCS]);
2142
2143 if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
2144 drm_handle_vblank(dev, 0)) {
2145 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) {
2146 intel_prepare_page_flip(dev, 0);
2147 intel_finish_page_flip(dev, 0);
2148 flip_mask &= ~I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT;
2149 }
2150 }
2151
2152 if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
2153 drm_handle_vblank(dev, 1)) {
2154 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) {
2155 intel_prepare_page_flip(dev, 1);
2156 intel_finish_page_flip(dev, 1);
2157 flip_mask &= ~I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2158 }
2159 }
2160
2161 iir = new_iir;
2162 }
2163
2164 return IRQ_HANDLED;
2165 }
2166
2167 static void i8xx_irq_uninstall(struct drm_device * dev)
2168 {
2169 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2170 int pipe;
2171
2172 for_each_pipe(pipe) {
2173 /* Clear enable bits; then clear status bits */
2174 I915_WRITE(PIPESTAT(pipe), 0);
2175 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
2176 }
2177 I915_WRITE16(IMR, 0xffff);
2178 I915_WRITE16(IER, 0x0);
2179 I915_WRITE16(IIR, I915_READ16(IIR));
2180 }
2181
2182 static void i915_irq_preinstall(struct drm_device * dev)
2183 {
2184 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2185 int pipe;
2186
2187 atomic_set(&dev_priv->irq_received, 0);
2188
2189 if (I915_HAS_HOTPLUG(dev)) {
2190 I915_WRITE(PORT_HOTPLUG_EN, 0);
2191 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2192 }
2193
2194 I915_WRITE16(HWSTAM, 0xeffe);
2195 for_each_pipe(pipe)
2196 I915_WRITE(PIPESTAT(pipe), 0);
2197 I915_WRITE(IMR, 0xffffffff);
2198 I915_WRITE(IER, 0x0);
2199 POSTING_READ(IER);
2200 }
2201
2202 static int i915_irq_postinstall(struct drm_device *dev)
2203 {
2204 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2205 u32 enable_mask;
2206
2207 dev_priv->pipestat[0] = 0;
2208 dev_priv->pipestat[1] = 0;
2209
2210 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
2211
2212 /* Unmask the interrupts that we always want on. */
2213 dev_priv->irq_mask =
2214 ~(I915_ASLE_INTERRUPT |
2215 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2216 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2217 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2218 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2219 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2220
2221 enable_mask =
2222 I915_ASLE_INTERRUPT |
2223 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2224 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2225 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
2226 I915_USER_INTERRUPT;
2227
2228 if (I915_HAS_HOTPLUG(dev)) {
2229 /* Enable in IER... */
2230 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
2231 /* and unmask in IMR */
2232 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
2233 }
2234
2235 I915_WRITE(IMR, dev_priv->irq_mask);
2236 I915_WRITE(IER, enable_mask);
2237 POSTING_READ(IER);
2238
2239 if (I915_HAS_HOTPLUG(dev)) {
2240 u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
2241
2242 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2243 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2244 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2245 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2246 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2247 hotplug_en |= HDMID_HOTPLUG_INT_EN;
2248 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_I915)
2249 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2250 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I915)
2251 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2252 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2253 hotplug_en |= CRT_HOTPLUG_INT_EN;
2254 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2255 }
2256
2257 /* Ignore TV since it's buggy */
2258
2259 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2260 }
2261
2262 intel_opregion_enable_asle(dev);
2263
2264 return 0;
2265 }
2266
2267 static irqreturn_t i915_irq_handler(DRM_IRQ_ARGS)
2268 {
2269 struct drm_device *dev = (struct drm_device *) arg;
2270 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2271 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
2272 unsigned long irqflags;
2273 u32 flip_mask =
2274 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2275 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
2276 u32 flip[2] = {
2277 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT,
2278 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
2279 };
2280 int pipe, ret = IRQ_NONE;
2281
2282 atomic_inc(&dev_priv->irq_received);
2283
2284 iir = I915_READ(IIR);
2285 do {
2286 bool irq_received = (iir & ~flip_mask) != 0;
2287 bool blc_event = false;
2288
2289 /* Can't rely on pipestat interrupt bit in iir as it might
2290 * have been cleared after the pipestat interrupt was received.
2291 * It doesn't set the bit in iir again, but it still produces
2292 * interrupts (for non-MSI).
2293 */
2294 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2295 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2296 i915_handle_error(dev, false);
2297
2298 for_each_pipe(pipe) {
2299 int reg = PIPESTAT(pipe);
2300 pipe_stats[pipe] = I915_READ(reg);
2301
2302 /* Clear the PIPE*STAT regs before the IIR */
2303 if (pipe_stats[pipe] & 0x8000ffff) {
2304 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2305 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2306 pipe_name(pipe));
2307 I915_WRITE(reg, pipe_stats[pipe]);
2308 irq_received = true;
2309 }
2310 }
2311 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2312
2313 if (!irq_received)
2314 break;
2315
2316 /* Consume port. Then clear IIR or we'll miss events */
2317 if ((I915_HAS_HOTPLUG(dev)) &&
2318 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
2319 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
2320
2321 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2322 hotplug_status);
2323 if (hotplug_status & dev_priv->hotplug_supported_mask)
2324 queue_work(dev_priv->wq,
2325 &dev_priv->hotplug_work);
2326
2327 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
2328 POSTING_READ(PORT_HOTPLUG_STAT);
2329 }
2330
2331 I915_WRITE(IIR, iir & ~flip_mask);
2332 new_iir = I915_READ(IIR); /* Flush posted writes */
2333
2334 if (iir & I915_USER_INTERRUPT)
2335 notify_ring(dev, &dev_priv->ring[RCS]);
2336
2337 for_each_pipe(pipe) {
2338 int plane = pipe;
2339 if (IS_MOBILE(dev))
2340 plane = !plane;
2341 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
2342 drm_handle_vblank(dev, pipe)) {
2343 if (iir & flip[plane]) {
2344 intel_prepare_page_flip(dev, plane);
2345 intel_finish_page_flip(dev, pipe);
2346 flip_mask &= ~flip[plane];
2347 }
2348 }
2349
2350 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
2351 blc_event = true;
2352 }
2353
2354 if (blc_event || (iir & I915_ASLE_INTERRUPT))
2355 intel_opregion_asle_intr(dev);
2356
2357 /* With MSI, interrupts are only generated when iir
2358 * transitions from zero to nonzero. If another bit got
2359 * set while we were handling the existing iir bits, then
2360 * we would never get another interrupt.
2361 *
2362 * This is fine on non-MSI as well, as if we hit this path
2363 * we avoid exiting the interrupt handler only to generate
2364 * another one.
2365 *
2366 * Note that for MSI this could cause a stray interrupt report
2367 * if an interrupt landed in the time between writing IIR and
2368 * the posting read. This should be rare enough to never
2369 * trigger the 99% of 100,000 interrupts test for disabling
2370 * stray interrupts.
2371 */
2372 ret = IRQ_HANDLED;
2373 iir = new_iir;
2374 } while (iir & ~flip_mask);
2375
2376 i915_update_dri1_breadcrumb(dev);
2377
2378 return ret;
2379 }
2380
2381 static void i915_irq_uninstall(struct drm_device * dev)
2382 {
2383 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2384 int pipe;
2385
2386 if (I915_HAS_HOTPLUG(dev)) {
2387 I915_WRITE(PORT_HOTPLUG_EN, 0);
2388 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2389 }
2390
2391 I915_WRITE16(HWSTAM, 0xffff);
2392 for_each_pipe(pipe) {
2393 /* Clear enable bits; then clear status bits */
2394 I915_WRITE(PIPESTAT(pipe), 0);
2395 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
2396 }
2397 I915_WRITE(IMR, 0xffffffff);
2398 I915_WRITE(IER, 0x0);
2399
2400 I915_WRITE(IIR, I915_READ(IIR));
2401 }
2402
2403 static void i965_irq_preinstall(struct drm_device * dev)
2404 {
2405 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2406 int pipe;
2407
2408 atomic_set(&dev_priv->irq_received, 0);
2409
2410 I915_WRITE(PORT_HOTPLUG_EN, 0);
2411 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2412
2413 I915_WRITE(HWSTAM, 0xeffe);
2414 for_each_pipe(pipe)
2415 I915_WRITE(PIPESTAT(pipe), 0);
2416 I915_WRITE(IMR, 0xffffffff);
2417 I915_WRITE(IER, 0x0);
2418 POSTING_READ(IER);
2419 }
2420
2421 static int i965_irq_postinstall(struct drm_device *dev)
2422 {
2423 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2424 u32 hotplug_en;
2425 u32 enable_mask;
2426 u32 error_mask;
2427
2428 /* Unmask the interrupts that we always want on. */
2429 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
2430 I915_DISPLAY_PORT_INTERRUPT |
2431 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2432 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2433 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
2434 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
2435 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2436
2437 enable_mask = ~dev_priv->irq_mask;
2438 enable_mask |= I915_USER_INTERRUPT;
2439
2440 if (IS_G4X(dev))
2441 enable_mask |= I915_BSD_USER_INTERRUPT;
2442
2443 dev_priv->pipestat[0] = 0;
2444 dev_priv->pipestat[1] = 0;
2445
2446 /*
2447 * Enable some error detection, note the instruction error mask
2448 * bit is reserved, so we leave it masked.
2449 */
2450 if (IS_G4X(dev)) {
2451 error_mask = ~(GM45_ERROR_PAGE_TABLE |
2452 GM45_ERROR_MEM_PRIV |
2453 GM45_ERROR_CP_PRIV |
2454 I915_ERROR_MEMORY_REFRESH);
2455 } else {
2456 error_mask = ~(I915_ERROR_PAGE_TABLE |
2457 I915_ERROR_MEMORY_REFRESH);
2458 }
2459 I915_WRITE(EMR, error_mask);
2460
2461 I915_WRITE(IMR, dev_priv->irq_mask);
2462 I915_WRITE(IER, enable_mask);
2463 POSTING_READ(IER);
2464
2465 /* Note HDMI and DP share hotplug bits */
2466 hotplug_en = 0;
2467 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2468 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2469 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2470 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2471 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2472 hotplug_en |= HDMID_HOTPLUG_INT_EN;
2473 if (IS_G4X(dev)) {
2474 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_G4X)
2475 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2476 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_G4X)
2477 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2478 } else {
2479 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS_I965)
2480 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2481 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS_I965)
2482 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2483 }
2484 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2485 hotplug_en |= CRT_HOTPLUG_INT_EN;
2486
2487 /* Programming the CRT detection parameters tends
2488 to generate a spurious hotplug event about three
2489 seconds later. So just do it once.
2490 */
2491 if (IS_G4X(dev))
2492 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
2493 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2494 }
2495
2496 /* Ignore TV since it's buggy */
2497
2498 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2499
2500 intel_opregion_enable_asle(dev);
2501
2502 return 0;
2503 }
2504
2505 static irqreturn_t i965_irq_handler(DRM_IRQ_ARGS)
2506 {
2507 struct drm_device *dev = (struct drm_device *) arg;
2508 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2509 u32 iir, new_iir;
2510 u32 pipe_stats[I915_MAX_PIPES];
2511 unsigned long irqflags;
2512 int irq_received;
2513 int ret = IRQ_NONE, pipe;
2514
2515 atomic_inc(&dev_priv->irq_received);
2516
2517 iir = I915_READ(IIR);
2518
2519 for (;;) {
2520 bool blc_event = false;
2521
2522 irq_received = iir != 0;
2523
2524 /* Can't rely on pipestat interrupt bit in iir as it might
2525 * have been cleared after the pipestat interrupt was received.
2526 * It doesn't set the bit in iir again, but it still produces
2527 * interrupts (for non-MSI).
2528 */
2529 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2530 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
2531 i915_handle_error(dev, false);
2532
2533 for_each_pipe(pipe) {
2534 int reg = PIPESTAT(pipe);
2535 pipe_stats[pipe] = I915_READ(reg);
2536
2537 /*
2538 * Clear the PIPE*STAT regs before the IIR
2539 */
2540 if (pipe_stats[pipe] & 0x8000ffff) {
2541 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
2542 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2543 pipe_name(pipe));
2544 I915_WRITE(reg, pipe_stats[pipe]);
2545 irq_received = 1;
2546 }
2547 }
2548 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2549
2550 if (!irq_received)
2551 break;
2552
2553 ret = IRQ_HANDLED;
2554
2555 /* Consume port. Then clear IIR or we'll miss events */
2556 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
2557 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
2558
2559 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2560 hotplug_status);
2561 if (hotplug_status & dev_priv->hotplug_supported_mask)
2562 queue_work(dev_priv->wq,
2563 &dev_priv->hotplug_work);
2564
2565 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
2566 I915_READ(PORT_HOTPLUG_STAT);
2567 }
2568
2569 I915_WRITE(IIR, iir);
2570 new_iir = I915_READ(IIR); /* Flush posted writes */
2571
2572 if (iir & I915_USER_INTERRUPT)
2573 notify_ring(dev, &dev_priv->ring[RCS]);
2574 if (iir & I915_BSD_USER_INTERRUPT)
2575 notify_ring(dev, &dev_priv->ring[VCS]);
2576
2577 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT)
2578 intel_prepare_page_flip(dev, 0);
2579
2580 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT)
2581 intel_prepare_page_flip(dev, 1);
2582
2583 for_each_pipe(pipe) {
2584 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
2585 drm_handle_vblank(dev, pipe)) {
2586 i915_pageflip_stall_check(dev, pipe);
2587 intel_finish_page_flip(dev, pipe);
2588 }
2589
2590 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
2591 blc_event = true;
2592 }
2593
2594
2595 if (blc_event || (iir & I915_ASLE_INTERRUPT))
2596 intel_opregion_asle_intr(dev);
2597
2598 /* With MSI, interrupts are only generated when iir
2599 * transitions from zero to nonzero. If another bit got
2600 * set while we were handling the existing iir bits, then
2601 * we would never get another interrupt.
2602 *
2603 * This is fine on non-MSI as well, as if we hit this path
2604 * we avoid exiting the interrupt handler only to generate
2605 * another one.
2606 *
2607 * Note that for MSI this could cause a stray interrupt report
2608 * if an interrupt landed in the time between writing IIR and
2609 * the posting read. This should be rare enough to never
2610 * trigger the 99% of 100,000 interrupts test for disabling
2611 * stray interrupts.
2612 */
2613 iir = new_iir;
2614 }
2615
2616 i915_update_dri1_breadcrumb(dev);
2617
2618 return ret;
2619 }
2620
2621 static void i965_irq_uninstall(struct drm_device * dev)
2622 {
2623 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2624 int pipe;
2625
2626 if (!dev_priv)
2627 return;
2628
2629 I915_WRITE(PORT_HOTPLUG_EN, 0);
2630 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2631
2632 I915_WRITE(HWSTAM, 0xffffffff);
2633 for_each_pipe(pipe)
2634 I915_WRITE(PIPESTAT(pipe), 0);
2635 I915_WRITE(IMR, 0xffffffff);
2636 I915_WRITE(IER, 0x0);
2637
2638 for_each_pipe(pipe)
2639 I915_WRITE(PIPESTAT(pipe),
2640 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
2641 I915_WRITE(IIR, I915_READ(IIR));
2642 }
2643
2644 void intel_irq_init(struct drm_device *dev)
2645 {
2646 struct drm_i915_private *dev_priv = dev->dev_private;
2647
2648 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
2649 INIT_WORK(&dev_priv->error_work, i915_error_work_func);
2650 INIT_WORK(&dev_priv->rps_work, gen6_pm_rps_work);
2651 INIT_WORK(&dev_priv->parity_error_work, ivybridge_parity_work);
2652
2653 dev->driver->get_vblank_counter = i915_get_vblank_counter;
2654 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
2655 if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
2656 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
2657 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
2658 }
2659
2660 if (drm_core_check_feature(dev, DRIVER_MODESET))
2661 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
2662 else
2663 dev->driver->get_vblank_timestamp = NULL;
2664 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
2665
2666 if (IS_VALLEYVIEW(dev)) {
2667 dev->driver->irq_handler = valleyview_irq_handler;
2668 dev->driver->irq_preinstall = valleyview_irq_preinstall;
2669 dev->driver->irq_postinstall = valleyview_irq_postinstall;
2670 dev->driver->irq_uninstall = valleyview_irq_uninstall;
2671 dev->driver->enable_vblank = valleyview_enable_vblank;
2672 dev->driver->disable_vblank = valleyview_disable_vblank;
2673 } else if (IS_IVYBRIDGE(dev)) {
2674 /* Share pre & uninstall handlers with ILK/SNB */
2675 dev->driver->irq_handler = ivybridge_irq_handler;
2676 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2677 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
2678 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2679 dev->driver->enable_vblank = ivybridge_enable_vblank;
2680 dev->driver->disable_vblank = ivybridge_disable_vblank;
2681 } else if (IS_HASWELL(dev)) {
2682 /* Share interrupts handling with IVB */
2683 dev->driver->irq_handler = ivybridge_irq_handler;
2684 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2685 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
2686 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2687 dev->driver->enable_vblank = ivybridge_enable_vblank;
2688 dev->driver->disable_vblank = ivybridge_disable_vblank;
2689 } else if (HAS_PCH_SPLIT(dev)) {
2690 dev->driver->irq_handler = ironlake_irq_handler;
2691 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2692 dev->driver->irq_postinstall = ironlake_irq_postinstall;
2693 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2694 dev->driver->enable_vblank = ironlake_enable_vblank;
2695 dev->driver->disable_vblank = ironlake_disable_vblank;
2696 } else {
2697 if (INTEL_INFO(dev)->gen == 2) {
2698 dev->driver->irq_preinstall = i8xx_irq_preinstall;
2699 dev->driver->irq_postinstall = i8xx_irq_postinstall;
2700 dev->driver->irq_handler = i8xx_irq_handler;
2701 dev->driver->irq_uninstall = i8xx_irq_uninstall;
2702 } else if (INTEL_INFO(dev)->gen == 3) {
2703 /* IIR "flip pending" means done if this bit is set */
2704 I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
2705
2706 dev->driver->irq_preinstall = i915_irq_preinstall;
2707 dev->driver->irq_postinstall = i915_irq_postinstall;
2708 dev->driver->irq_uninstall = i915_irq_uninstall;
2709 dev->driver->irq_handler = i915_irq_handler;
2710 } else {
2711 dev->driver->irq_preinstall = i965_irq_preinstall;
2712 dev->driver->irq_postinstall = i965_irq_postinstall;
2713 dev->driver->irq_uninstall = i965_irq_uninstall;
2714 dev->driver->irq_handler = i965_irq_handler;
2715 }
2716 dev->driver->enable_vblank = i915_enable_vblank;
2717 dev->driver->disable_vblank = i915_disable_vblank;
2718 }
2719 }
Linux kernel - Deliverables
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