?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / gpu / drm / i915 / i915_irq.c
blob5bd4361ea84dd2e5e4a0e39a6af249ccd7786573
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 #include <linux/sysrq.h>
30 #include <linux/slab.h>
31 #include "drmP.h"
32 #include "drm.h"
33 #include "i915_drm.h"
34 #include "i915_drv.h"
35 #include "i915_trace.h"
36 #include "intel_drv.h"
37
38 #define MAX_NOPID ((u32)~0)
39
40 /**
41 * Interrupts that are always left unmasked.
42 *
43 * Since pipe events are edge-triggered from the PIPESTAT register to IIR,
44 * we leave them always unmasked in IMR and then control enabling them through
45 * PIPESTAT alone.
46 */
47 #define I915_INTERRUPT_ENABLE_FIX \
48 (I915_ASLE_INTERRUPT | \
49 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | \
50 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | \
51 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | \
52 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | \
53 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
54
55 /** Interrupts that we mask and unmask at runtime. */
56 #define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT | I915_BSD_USER_INTERRUPT)
57
58 #define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\
59 PIPE_VBLANK_INTERRUPT_STATUS)
60
61 #define I915_PIPE_VBLANK_ENABLE (PIPE_START_VBLANK_INTERRUPT_ENABLE |\
62 PIPE_VBLANK_INTERRUPT_ENABLE)
63
64 #define DRM_I915_VBLANK_PIPE_ALL (DRM_I915_VBLANK_PIPE_A | \
65 DRM_I915_VBLANK_PIPE_B)
66
67 /* For display hotplug interrupt */
68 static void
69 ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
70 {
71 if ((dev_priv->irq_mask & mask) != 0) {
72 dev_priv->irq_mask &= ~mask;
73 I915_WRITE(DEIMR, dev_priv->irq_mask);
74 POSTING_READ(DEIMR);
75 }
76 }
77
78 static inline void
79 ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
80 {
81 if ((dev_priv->irq_mask & mask) != mask) {
82 dev_priv->irq_mask |= mask;
83 I915_WRITE(DEIMR, dev_priv->irq_mask);
84 POSTING_READ(DEIMR);
85 }
86 }
87
88 void
89 i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
90 {
91 if ((dev_priv->pipestat[pipe] & mask) != mask) {
92 u32 reg = PIPESTAT(pipe);
93
94 dev_priv->pipestat[pipe] |= mask;
95 /* Enable the interrupt, clear any pending status */
96 I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16));
97 POSTING_READ(reg);
98 }
99 }
100
101 void
102 i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
103 {
104 if ((dev_priv->pipestat[pipe] & mask) != 0) {
105 u32 reg = PIPESTAT(pipe);
106
107 dev_priv->pipestat[pipe] &= ~mask;
108 I915_WRITE(reg, dev_priv->pipestat[pipe]);
109 POSTING_READ(reg);
110 }
111 }
112
113 /**
114 * intel_enable_asle - enable ASLE interrupt for OpRegion
115 */
116 void intel_enable_asle(struct drm_device *dev)
117 {
118 drm_i915_private_t *dev_priv = dev->dev_private;
119 unsigned long irqflags;
120
121 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
122
123 if (HAS_PCH_SPLIT(dev))
124 ironlake_enable_display_irq(dev_priv, DE_GSE);
125 else {
126 i915_enable_pipestat(dev_priv, 1,
127 PIPE_LEGACY_BLC_EVENT_ENABLE);
128 if (INTEL_INFO(dev)->gen >= 4)
129 i915_enable_pipestat(dev_priv, 0,
130 PIPE_LEGACY_BLC_EVENT_ENABLE);
131 }
132
133 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
134 }
135
136 /**
137 * i915_pipe_enabled - check if a pipe is enabled
138 * @dev: DRM device
139 * @pipe: pipe to check
140 *
141 * Reading certain registers when the pipe is disabled can hang the chip.
142 * Use this routine to make sure the PLL is running and the pipe is active
143 * before reading such registers if unsure.
144 */
145 static int
146 i915_pipe_enabled(struct drm_device *dev, int pipe)
147 {
148 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
149 return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
150 }
151
152 /* Called from drm generic code, passed a 'crtc', which
153 * we use as a pipe index
154 */
155 static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
156 {
157 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
158 unsigned long high_frame;
159 unsigned long low_frame;
160 u32 high1, high2, low;
161
162 if (!i915_pipe_enabled(dev, pipe)) {
163 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
164 "pipe %c\n", pipe_name(pipe));
165 return 0;
166 }
167
168 high_frame = PIPEFRAME(pipe);
169 low_frame = PIPEFRAMEPIXEL(pipe);
170
171 /*
172 * High & low register fields aren't synchronized, so make sure
173 * we get a low value that's stable across two reads of the high
174 * register.
175 */
176 do {
177 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
178 low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
179 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
180 } while (high1 != high2);
181
182 high1 >>= PIPE_FRAME_HIGH_SHIFT;
183 low >>= PIPE_FRAME_LOW_SHIFT;
184 return (high1 << 8) | low;
185 }
186
187 static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
188 {
189 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
190 int reg = PIPE_FRMCOUNT_GM45(pipe);
191
192 if (!i915_pipe_enabled(dev, pipe)) {
193 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
194 "pipe %c\n", pipe_name(pipe));
195 return 0;
196 }
197
198 return I915_READ(reg);
199 }
200
201 static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
202 int *vpos, int *hpos)
203 {
204 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
205 u32 vbl = 0, position = 0;
206 int vbl_start, vbl_end, htotal, vtotal;
207 bool in_vbl = true;
208 int ret = 0;
209
210 if (!i915_pipe_enabled(dev, pipe)) {
211 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
212 "pipe %c\n", pipe_name(pipe));
213 return 0;
214 }
215
216 /* Get vtotal. */
217 vtotal = 1 + ((I915_READ(VTOTAL(pipe)) >> 16) & 0x1fff);
218
219 if (INTEL_INFO(dev)->gen >= 4) {
220 /* No obvious pixelcount register. Only query vertical
221 * scanout position from Display scan line register.
222 */
223 position = I915_READ(PIPEDSL(pipe));
224
225 /* Decode into vertical scanout position. Don't have
226 * horizontal scanout position.
227 */
228 *vpos = position & 0x1fff;
229 *hpos = 0;
230 } else {
231 /* Have access to pixelcount since start of frame.
232 * We can split this into vertical and horizontal
233 * scanout position.
234 */
235 position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
236
237 htotal = 1 + ((I915_READ(HTOTAL(pipe)) >> 16) & 0x1fff);
238 *vpos = position / htotal;
239 *hpos = position - (*vpos * htotal);
240 }
241
242 /* Query vblank area. */
243 vbl = I915_READ(VBLANK(pipe));
244
245 /* Test position against vblank region. */
246 vbl_start = vbl & 0x1fff;
247 vbl_end = (vbl >> 16) & 0x1fff;
248
249 if ((*vpos < vbl_start) || (*vpos > vbl_end))
250 in_vbl = false;
251
252 /* Inside "upper part" of vblank area? Apply corrective offset: */
253 if (in_vbl && (*vpos >= vbl_start))
254 *vpos = *vpos - vtotal;
255
256 /* Readouts valid? */
257 if (vbl > 0)
258 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
259
260 /* In vblank? */
261 if (in_vbl)
262 ret |= DRM_SCANOUTPOS_INVBL;
263
264 return ret;
265 }
266
267 static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
268 int *max_error,
269 struct timeval *vblank_time,
270 unsigned flags)
271 {
272 struct drm_i915_private *dev_priv = dev->dev_private;
273 struct drm_crtc *crtc;
274
275 if (pipe < 0 || pipe >= dev_priv->num_pipe) {
276 DRM_ERROR("Invalid crtc %d\n", pipe);
277 return -EINVAL;
278 }
279
280 /* Get drm_crtc to timestamp: */
281 crtc = intel_get_crtc_for_pipe(dev, pipe);
282 if (crtc == NULL) {
283 DRM_ERROR("Invalid crtc %d\n", pipe);
284 return -EINVAL;
285 }
286
287 if (!crtc->enabled) {
288 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
289 return -EBUSY;
290 }
291
292 /* Helper routine in DRM core does all the work: */
293 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
294 vblank_time, flags,
295 crtc);
296 }
297
298 /*
299 * Handle hotplug events outside the interrupt handler proper.
300 */
301 static void i915_hotplug_work_func(struct work_struct *work)
302 {
303 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
304 hotplug_work);
305 struct drm_device *dev = dev_priv->dev;
306 struct drm_mode_config *mode_config = &dev->mode_config;
307 struct intel_encoder *encoder;
308
309 mutex_lock(&mode_config->mutex);
310 DRM_DEBUG_KMS("running encoder hotplug functions\n");
311
312 list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
313 if (encoder->hot_plug)
314 encoder->hot_plug(encoder);
315
316 mutex_unlock(&mode_config->mutex);
317
318 /* Just fire off a uevent and let userspace tell us what to do */
319 drm_helper_hpd_irq_event(dev);
320 }
321
322 static void i915_handle_rps_change(struct drm_device *dev)
323 {
324 drm_i915_private_t *dev_priv = dev->dev_private;
325 u32 busy_up, busy_down, max_avg, min_avg;
326 u8 new_delay = dev_priv->cur_delay;
327
328 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
329 busy_up = I915_READ(RCPREVBSYTUPAVG);
330 busy_down = I915_READ(RCPREVBSYTDNAVG);
331 max_avg = I915_READ(RCBMAXAVG);
332 min_avg = I915_READ(RCBMINAVG);
333
334 /* Handle RCS change request from hw */
335 if (busy_up > max_avg) {
336 if (dev_priv->cur_delay != dev_priv->max_delay)
337 new_delay = dev_priv->cur_delay - 1;
338 if (new_delay < dev_priv->max_delay)
339 new_delay = dev_priv->max_delay;
340 } else if (busy_down < min_avg) {
341 if (dev_priv->cur_delay != dev_priv->min_delay)
342 new_delay = dev_priv->cur_delay + 1;
343 if (new_delay > dev_priv->min_delay)
344 new_delay = dev_priv->min_delay;
345 }
346
347 if (ironlake_set_drps(dev, new_delay))
348 dev_priv->cur_delay = new_delay;
349
350 return;
351 }
352
353 static void notify_ring(struct drm_device *dev,
354 struct intel_ring_buffer *ring)
355 {
356 struct drm_i915_private *dev_priv = dev->dev_private;
357 u32 seqno;
358
359 if (ring->obj == NULL)
360 return;
361
362 seqno = ring->get_seqno(ring);
363 trace_i915_gem_request_complete(ring, seqno);
364
365 ring->irq_seqno = seqno;
366 wake_up_all(&ring->irq_queue);
367 if (i915_enable_hangcheck) {
368 dev_priv->hangcheck_count = 0;
369 mod_timer(&dev_priv->hangcheck_timer,
370 jiffies +
371 msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
372 }
373 }
374
375 static void gen6_pm_rps_work(struct work_struct *work)
376 {
377 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
378 rps_work);
379 u8 new_delay = dev_priv->cur_delay;
380 u32 pm_iir, pm_imr;
381
382 spin_lock_irq(&dev_priv->rps_lock);
383 pm_iir = dev_priv->pm_iir;
384 dev_priv->pm_iir = 0;
385 pm_imr = I915_READ(GEN6_PMIMR);
386 I915_WRITE(GEN6_PMIMR, 0);
387 spin_unlock_irq(&dev_priv->rps_lock);
388
389 if (!pm_iir)
390 return;
391
392 mutex_lock(&dev_priv->dev->struct_mutex);
393 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
394 if (dev_priv->cur_delay != dev_priv->max_delay)
395 new_delay = dev_priv->cur_delay + 1;
396 if (new_delay > dev_priv->max_delay)
397 new_delay = dev_priv->max_delay;
398 } else if (pm_iir & (GEN6_PM_RP_DOWN_THRESHOLD | GEN6_PM_RP_DOWN_TIMEOUT)) {
399 gen6_gt_force_wake_get(dev_priv);
400 if (dev_priv->cur_delay != dev_priv->min_delay)
401 new_delay = dev_priv->cur_delay - 1;
402 if (new_delay < dev_priv->min_delay) {
403 new_delay = dev_priv->min_delay;
404 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
405 I915_READ(GEN6_RP_INTERRUPT_LIMITS) |
406 ((new_delay << 16) & 0x3f0000));
407 } else {
408 /* Make sure we continue to get down interrupts
409 * until we hit the minimum frequency */
410 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
411 I915_READ(GEN6_RP_INTERRUPT_LIMITS) & ~0x3f0000);
412 }
413 gen6_gt_force_wake_put(dev_priv);
414 }
415
416 gen6_set_rps(dev_priv->dev, new_delay);
417 dev_priv->cur_delay = new_delay;
418
419 /*
420 * rps_lock not held here because clearing is non-destructive. There is
421 * an *extremely* unlikely race with gen6_rps_enable() that is prevented
422 * by holding struct_mutex for the duration of the write.
423 */
424 mutex_unlock(&dev_priv->dev->struct_mutex);
425 }
426
427 static void pch_irq_handler(struct drm_device *dev)
428 {
429 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
430 u32 pch_iir;
431 int pipe;
432
433 pch_iir = I915_READ(SDEIIR);
434
435 if (pch_iir & SDE_AUDIO_POWER_MASK)
436 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
437 (pch_iir & SDE_AUDIO_POWER_MASK) >>
438 SDE_AUDIO_POWER_SHIFT);
439
440 if (pch_iir & SDE_GMBUS)
441 DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
442
443 if (pch_iir & SDE_AUDIO_HDCP_MASK)
444 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
445
446 if (pch_iir & SDE_AUDIO_TRANS_MASK)
447 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
448
449 if (pch_iir & SDE_POISON)
450 DRM_ERROR("PCH poison interrupt\n");
451
452 if (pch_iir & SDE_FDI_MASK)
453 for_each_pipe(pipe)
454 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
455 pipe_name(pipe),
456 I915_READ(FDI_RX_IIR(pipe)));
457
458 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
459 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
460
461 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
462 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
463
464 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
465 DRM_DEBUG_DRIVER("PCH transcoder B underrun interrupt\n");
466 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
467 DRM_DEBUG_DRIVER("PCH transcoder A underrun interrupt\n");
468 }
469
470 static irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS)
471 {
472 struct drm_device *dev = (struct drm_device *) arg;
473 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
474 int ret = IRQ_NONE;
475 u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir;
476 struct drm_i915_master_private *master_priv;
477
478 atomic_inc(&dev_priv->irq_received);
479
480 /* disable master interrupt before clearing iir */
481 de_ier = I915_READ(DEIER);
482 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
483 POSTING_READ(DEIER);
484
485 de_iir = I915_READ(DEIIR);
486 gt_iir = I915_READ(GTIIR);
487 pch_iir = I915_READ(SDEIIR);
488 pm_iir = I915_READ(GEN6_PMIIR);
489
490 if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 && pm_iir == 0)
491 goto done;
492
493 ret = IRQ_HANDLED;
494
495 if (dev->primary->master) {
496 master_priv = dev->primary->master->driver_priv;
497 if (master_priv->sarea_priv)
498 master_priv->sarea_priv->last_dispatch =
499 READ_BREADCRUMB(dev_priv);
500 }
501
502 if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY))
503 notify_ring(dev, &dev_priv->ring[RCS]);
504 if (gt_iir & GT_GEN6_BSD_USER_INTERRUPT)
505 notify_ring(dev, &dev_priv->ring[VCS]);
506 if (gt_iir & GT_BLT_USER_INTERRUPT)
507 notify_ring(dev, &dev_priv->ring[BCS]);
508
509 if (de_iir & DE_GSE_IVB)
510 intel_opregion_gse_intr(dev);
511
512 if (de_iir & DE_PLANEA_FLIP_DONE_IVB) {
513 intel_prepare_page_flip(dev, 0);
514 intel_finish_page_flip_plane(dev, 0);
515 }
516
517 if (de_iir & DE_PLANEB_FLIP_DONE_IVB) {
518 intel_prepare_page_flip(dev, 1);
519 intel_finish_page_flip_plane(dev, 1);
520 }
521
522 if (de_iir & DE_PIPEA_VBLANK_IVB)
523 drm_handle_vblank(dev, 0);
524
525 if (de_iir & DE_PIPEB_VBLANK_IVB)
526 drm_handle_vblank(dev, 1);
527
528 /* check event from PCH */
529 if (de_iir & DE_PCH_EVENT_IVB) {
530 if (pch_iir & SDE_HOTPLUG_MASK_CPT)
531 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
532 pch_irq_handler(dev);
533 }
534
535 if (pm_iir & GEN6_PM_DEFERRED_EVENTS) {
536 unsigned long flags;
537 spin_lock_irqsave(&dev_priv->rps_lock, flags);
538 WARN(dev_priv->pm_iir & pm_iir, "Missed a PM interrupt\n");
539 dev_priv->pm_iir |= pm_iir;
540 I915_WRITE(GEN6_PMIMR, dev_priv->pm_iir);
541 POSTING_READ(GEN6_PMIMR);
542 spin_unlock_irqrestore(&dev_priv->rps_lock, flags);
543 queue_work(dev_priv->wq, &dev_priv->rps_work);
544 }
545
546 /* should clear PCH hotplug event before clear CPU irq */
547 I915_WRITE(SDEIIR, pch_iir);
548 I915_WRITE(GTIIR, gt_iir);
549 I915_WRITE(DEIIR, de_iir);
550 I915_WRITE(GEN6_PMIIR, pm_iir);
551
552 done:
553 I915_WRITE(DEIER, de_ier);
554 POSTING_READ(DEIER);
555
556 return ret;
557 }
558
559 static irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS)
560 {
561 struct drm_device *dev = (struct drm_device *) arg;
562 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
563 int ret = IRQ_NONE;
564 u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir;
565 u32 hotplug_mask;
566 struct drm_i915_master_private *master_priv;
567 u32 bsd_usr_interrupt = GT_BSD_USER_INTERRUPT;
568
569 atomic_inc(&dev_priv->irq_received);
570
571 if (IS_GEN6(dev))
572 bsd_usr_interrupt = GT_GEN6_BSD_USER_INTERRUPT;
573
574 /* disable master interrupt before clearing iir */
575 de_ier = I915_READ(DEIER);
576 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
577 POSTING_READ(DEIER);
578
579 de_iir = I915_READ(DEIIR);
580 gt_iir = I915_READ(GTIIR);
581 pch_iir = I915_READ(SDEIIR);
582 pm_iir = I915_READ(GEN6_PMIIR);
583
584 if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 &&
585 (!IS_GEN6(dev) || pm_iir == 0))
586 goto done;
587
588 if (HAS_PCH_CPT(dev))
589 hotplug_mask = SDE_HOTPLUG_MASK_CPT;
590 else
591 hotplug_mask = SDE_HOTPLUG_MASK;
592
593 ret = IRQ_HANDLED;
594
595 if (dev->primary->master) {
596 master_priv = dev->primary->master->driver_priv;
597 if (master_priv->sarea_priv)
598 master_priv->sarea_priv->last_dispatch =
599 READ_BREADCRUMB(dev_priv);
600 }
601
602 if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY))
603 notify_ring(dev, &dev_priv->ring[RCS]);
604 if (gt_iir & bsd_usr_interrupt)
605 notify_ring(dev, &dev_priv->ring[VCS]);
606 if (gt_iir & GT_BLT_USER_INTERRUPT)
607 notify_ring(dev, &dev_priv->ring[BCS]);
608
609 if (de_iir & DE_GSE)
610 intel_opregion_gse_intr(dev);
611
612 if (de_iir & DE_PLANEA_FLIP_DONE) {
613 intel_prepare_page_flip(dev, 0);
614 intel_finish_page_flip_plane(dev, 0);
615 }
616
617 if (de_iir & DE_PLANEB_FLIP_DONE) {
618 intel_prepare_page_flip(dev, 1);
619 intel_finish_page_flip_plane(dev, 1);
620 }
621
622 if (de_iir & DE_PIPEA_VBLANK)
623 drm_handle_vblank(dev, 0);
624
625 if (de_iir & DE_PIPEB_VBLANK)
626 drm_handle_vblank(dev, 1);
627
628 /* check event from PCH */
629 if (de_iir & DE_PCH_EVENT) {
630 if (pch_iir & hotplug_mask)
631 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
632 pch_irq_handler(dev);
633 }
634
635 if (de_iir & DE_PCU_EVENT) {
636 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
637 i915_handle_rps_change(dev);
638 }
639
640 if (IS_GEN6(dev) && pm_iir & GEN6_PM_DEFERRED_EVENTS) {
641 /*
642 * IIR bits should never already be set because IMR should
643 * prevent an interrupt from being shown in IIR. The warning
644 * displays a case where we've unsafely cleared
645 * dev_priv->pm_iir. Although missing an interrupt of the same
646 * type is not a problem, it displays a problem in the logic.
647 *
648 * The mask bit in IMR is cleared by rps_work.
649 */
650 unsigned long flags;
651 spin_lock_irqsave(&dev_priv->rps_lock, flags);
652 WARN(dev_priv->pm_iir & pm_iir, "Missed a PM interrupt\n");
653 dev_priv->pm_iir |= pm_iir;
654 I915_WRITE(GEN6_PMIMR, dev_priv->pm_iir);
655 POSTING_READ(GEN6_PMIMR);
656 spin_unlock_irqrestore(&dev_priv->rps_lock, flags);
657 queue_work(dev_priv->wq, &dev_priv->rps_work);
658 }
659
660 /* should clear PCH hotplug event before clear CPU irq */
661 I915_WRITE(SDEIIR, pch_iir);
662 I915_WRITE(GTIIR, gt_iir);
663 I915_WRITE(DEIIR, de_iir);
664 I915_WRITE(GEN6_PMIIR, pm_iir);
665
666 done:
667 I915_WRITE(DEIER, de_ier);
668 POSTING_READ(DEIER);
669
670 return ret;
671 }
672
673 /**
674 * i915_error_work_func - do process context error handling work
675 * @work: work struct
676 *
677 * Fire an error uevent so userspace can see that a hang or error
678 * was detected.
679 */
680 static void i915_error_work_func(struct work_struct *work)
681 {
682 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
683 error_work);
684 struct drm_device *dev = dev_priv->dev;
685 char *error_event[] = { "ERROR=1", NULL };
686 char *reset_event[] = { "RESET=1", NULL };
687 char *reset_done_event[] = { "ERROR=0", NULL };
688
689 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
690
691 if (atomic_read(&dev_priv->mm.wedged)) {
692 DRM_DEBUG_DRIVER("resetting chip\n");
693 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event);
694 if (!i915_reset(dev, GRDOM_RENDER)) {
695 atomic_set(&dev_priv->mm.wedged, 0);
696 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event);
697 }
698 complete_all(&dev_priv->error_completion);
699 }
700 }
701
702 #ifdef CONFIG_DEBUG_FS
703 static struct drm_i915_error_object *
704 i915_error_object_create(struct drm_i915_private *dev_priv,
705 struct drm_i915_gem_object *src)
706 {
707 struct drm_i915_error_object *dst;
708 int page, page_count;
709 u32 reloc_offset;
710
711 if (src == NULL || src->pages == NULL)
712 return NULL;
713
714 page_count = src->base.size / PAGE_SIZE;
715
716 dst = kmalloc(sizeof(*dst) + page_count * sizeof(u32 *), GFP_ATOMIC);
717 if (dst == NULL)
718 return NULL;
719
720 reloc_offset = src->gtt_offset;
721 for (page = 0; page < page_count; page++) {
722 unsigned long flags;
723 void __iomem *s;
724 void *d;
725
726 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
727 if (d == NULL)
728 goto unwind;
729
730 local_irq_save(flags);
731 s = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
732 reloc_offset);
733 memcpy_fromio(d, s, PAGE_SIZE);
734 io_mapping_unmap_atomic(s);
735 local_irq_restore(flags);
736
737 dst->pages[page] = d;
738
739 reloc_offset += PAGE_SIZE;
740 }
741 dst->page_count = page_count;
742 dst->gtt_offset = src->gtt_offset;
743
744 return dst;
745
746 unwind:
747 while (page--)
748 kfree(dst->pages[page]);
749 kfree(dst);
750 return NULL;
751 }
752
753 static void
754 i915_error_object_free(struct drm_i915_error_object *obj)
755 {
756 int page;
757
758 if (obj == NULL)
759 return;
760
761 for (page = 0; page < obj->page_count; page++)
762 kfree(obj->pages[page]);
763
764 kfree(obj);
765 }
766
767 static void
768 i915_error_state_free(struct drm_device *dev,
769 struct drm_i915_error_state *error)
770 {
771 int i;
772
773 for (i = 0; i < ARRAY_SIZE(error->batchbuffer); i++)
774 i915_error_object_free(error->batchbuffer[i]);
775
776 for (i = 0; i < ARRAY_SIZE(error->ringbuffer); i++)
777 i915_error_object_free(error->ringbuffer[i]);
778
779 kfree(error->active_bo);
780 kfree(error->overlay);
781 kfree(error);
782 }
783
784 static u32 capture_bo_list(struct drm_i915_error_buffer *err,
785 int count,
786 struct list_head *head)
787 {
788 struct drm_i915_gem_object *obj;
789 int i = 0;
790
791 list_for_each_entry(obj, head, mm_list) {
792 err->size = obj->base.size;
793 err->name = obj->base.name;
794 err->seqno = obj->last_rendering_seqno;
795 err->gtt_offset = obj->gtt_offset;
796 err->read_domains = obj->base.read_domains;
797 err->write_domain = obj->base.write_domain;
798 err->fence_reg = obj->fence_reg;
799 err->pinned = 0;
800 if (obj->pin_count > 0)
801 err->pinned = 1;
802 if (obj->user_pin_count > 0)
803 err->pinned = -1;
804 err->tiling = obj->tiling_mode;
805 err->dirty = obj->dirty;
806 err->purgeable = obj->madv != I915_MADV_WILLNEED;
807 err->ring = obj->ring ? obj->ring->id : 0;
808 err->cache_level = obj->cache_level;
809
810 if (++i == count)
811 break;
812
813 err++;
814 }
815
816 return i;
817 }
818
819 static void i915_gem_record_fences(struct drm_device *dev,
820 struct drm_i915_error_state *error)
821 {
822 struct drm_i915_private *dev_priv = dev->dev_private;
823 int i;
824
825 /* Fences */
826 switch (INTEL_INFO(dev)->gen) {
827 case 7:
828 case 6:
829 for (i = 0; i < 16; i++)
830 error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
831 break;
832 case 5:
833 case 4:
834 for (i = 0; i < 16; i++)
835 error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
836 break;
837 case 3:
838 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
839 for (i = 0; i < 8; i++)
840 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
841 case 2:
842 for (i = 0; i < 8; i++)
843 error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
844 break;
845
846 }
847 }
848
849 static struct drm_i915_error_object *
850 i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
851 struct intel_ring_buffer *ring)
852 {
853 struct drm_i915_gem_object *obj;
854 u32 seqno;
855
856 if (!ring->get_seqno)
857 return NULL;
858
859 seqno = ring->get_seqno(ring);
860 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
861 if (obj->ring != ring)
862 continue;
863
864 if (i915_seqno_passed(seqno, obj->last_rendering_seqno))
865 continue;
866
867 if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
868 continue;
869
870 /* We need to copy these to an anonymous buffer as the simplest
871 * method to avoid being overwritten by userspace.
872 */
873 return i915_error_object_create(dev_priv, obj);
874 }
875
876 return NULL;
877 }
878
879 /**
880 * i915_capture_error_state - capture an error record for later analysis
881 * @dev: drm device
882 *
883 * Should be called when an error is detected (either a hang or an error
884 * interrupt) to capture error state from the time of the error. Fills
885 * out a structure which becomes available in debugfs for user level tools
886 * to pick up.
887 */
888 static void i915_capture_error_state(struct drm_device *dev)
889 {
890 struct drm_i915_private *dev_priv = dev->dev_private;
891 struct drm_i915_gem_object *obj;
892 struct drm_i915_error_state *error;
893 unsigned long flags;
894 int i, pipe;
895
896 spin_lock_irqsave(&dev_priv->error_lock, flags);
897 error = dev_priv->first_error;
898 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
899 if (error)
900 return;
901
902 /* Account for pipe specific data like PIPE*STAT */
903 error = kmalloc(sizeof(*error), GFP_ATOMIC);
904 if (!error) {
905 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
906 return;
907 }
908
909 DRM_INFO("capturing error event; look for more information in /debug/dri/%d/i915_error_state\n",
910 dev->primary->index);
911
912 error->seqno = dev_priv->ring[RCS].get_seqno(&dev_priv->ring[RCS]);
913 error->eir = I915_READ(EIR);
914 error->pgtbl_er = I915_READ(PGTBL_ER);
915 for_each_pipe(pipe)
916 error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
917 error->instpm = I915_READ(INSTPM);
918 error->error = 0;
919 if (INTEL_INFO(dev)->gen >= 6) {
920 error->error = I915_READ(ERROR_GEN6);
921
922 error->bcs_acthd = I915_READ(BCS_ACTHD);
923 error->bcs_ipehr = I915_READ(BCS_IPEHR);
924 error->bcs_ipeir = I915_READ(BCS_IPEIR);
925 error->bcs_instdone = I915_READ(BCS_INSTDONE);
926 error->bcs_seqno = 0;
927 if (dev_priv->ring[BCS].get_seqno)
928 error->bcs_seqno = dev_priv->ring[BCS].get_seqno(&dev_priv->ring[BCS]);
929
930 error->vcs_acthd = I915_READ(VCS_ACTHD);
931 error->vcs_ipehr = I915_READ(VCS_IPEHR);
932 error->vcs_ipeir = I915_READ(VCS_IPEIR);
933 error->vcs_instdone = I915_READ(VCS_INSTDONE);
934 error->vcs_seqno = 0;
935 if (dev_priv->ring[VCS].get_seqno)
936 error->vcs_seqno = dev_priv->ring[VCS].get_seqno(&dev_priv->ring[VCS]);
937 }
938 if (INTEL_INFO(dev)->gen >= 4) {
939 error->ipeir = I915_READ(IPEIR_I965);
940 error->ipehr = I915_READ(IPEHR_I965);
941 error->instdone = I915_READ(INSTDONE_I965);
942 error->instps = I915_READ(INSTPS);
943 error->instdone1 = I915_READ(INSTDONE1);
944 error->acthd = I915_READ(ACTHD_I965);
945 error->bbaddr = I915_READ64(BB_ADDR);
946 } else {
947 error->ipeir = I915_READ(IPEIR);
948 error->ipehr = I915_READ(IPEHR);
949 error->instdone = I915_READ(INSTDONE);
950 error->acthd = I915_READ(ACTHD);
951 error->bbaddr = 0;
952 }
953 i915_gem_record_fences(dev, error);
954
955 /* Record the active batch and ring buffers */
956 for (i = 0; i < I915_NUM_RINGS; i++) {
957 error->batchbuffer[i] =
958 i915_error_first_batchbuffer(dev_priv,
959 &dev_priv->ring[i]);
960
961 error->ringbuffer[i] =
962 i915_error_object_create(dev_priv,
963 dev_priv->ring[i].obj);
964 }
965
966 /* Record buffers on the active and pinned lists. */
967 error->active_bo = NULL;
968 error->pinned_bo = NULL;
969
970 i = 0;
971 list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
972 i++;
973 error->active_bo_count = i;
974 list_for_each_entry(obj, &dev_priv->mm.pinned_list, mm_list)
975 i++;
976 error->pinned_bo_count = i - error->active_bo_count;
977
978 error->active_bo = NULL;
979 error->pinned_bo = NULL;
980 if (i) {
981 error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
982 GFP_ATOMIC);
983 if (error->active_bo)
984 error->pinned_bo =
985 error->active_bo + error->active_bo_count;
986 }
987
988 if (error->active_bo)
989 error->active_bo_count =
990 capture_bo_list(error->active_bo,
991 error->active_bo_count,
992 &dev_priv->mm.active_list);
993
994 if (error->pinned_bo)
995 error->pinned_bo_count =
996 capture_bo_list(error->pinned_bo,
997 error->pinned_bo_count,
998 &dev_priv->mm.pinned_list);
999
1000 do_gettimeofday(&error->time);
1001
1002 error->overlay = intel_overlay_capture_error_state(dev);
1003 error->display = intel_display_capture_error_state(dev);
1004
1005 spin_lock_irqsave(&dev_priv->error_lock, flags);
1006 if (dev_priv->first_error == NULL) {
1007 dev_priv->first_error = error;
1008 error = NULL;
1009 }
1010 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
1011
1012 if (error)
1013 i915_error_state_free(dev, error);
1014 }
1015
1016 void i915_destroy_error_state(struct drm_device *dev)
1017 {
1018 struct drm_i915_private *dev_priv = dev->dev_private;
1019 struct drm_i915_error_state *error;
1020
1021 spin_lock(&dev_priv->error_lock);
1022 error = dev_priv->first_error;
1023 dev_priv->first_error = NULL;
1024 spin_unlock(&dev_priv->error_lock);
1025
1026 if (error)
1027 i915_error_state_free(dev, error);
1028 }
1029 #else
1030 #define i915_capture_error_state(x)
1031 #endif
1032
1033 static void i915_report_and_clear_eir(struct drm_device *dev)
1034 {
1035 struct drm_i915_private *dev_priv = dev->dev_private;
1036 u32 eir = I915_READ(EIR);
1037 int pipe;
1038
1039 if (!eir)
1040 return;
1041
1042 printk(KERN_ERR "render error detected, EIR: 0x%08x\n",
1043 eir);
1044
1045 if (IS_G4X(dev)) {
1046 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
1047 u32 ipeir = I915_READ(IPEIR_I965);
1048
1049 printk(KERN_ERR " IPEIR: 0x%08x\n",
1050 I915_READ(IPEIR_I965));
1051 printk(KERN_ERR " IPEHR: 0x%08x\n",
1052 I915_READ(IPEHR_I965));
1053 printk(KERN_ERR " INSTDONE: 0x%08x\n",
1054 I915_READ(INSTDONE_I965));
1055 printk(KERN_ERR " INSTPS: 0x%08x\n",
1056 I915_READ(INSTPS));
1057 printk(KERN_ERR " INSTDONE1: 0x%08x\n",
1058 I915_READ(INSTDONE1));
1059 printk(KERN_ERR " ACTHD: 0x%08x\n",
1060 I915_READ(ACTHD_I965));
1061 I915_WRITE(IPEIR_I965, ipeir);
1062 POSTING_READ(IPEIR_I965);
1063 }
1064 if (eir & GM45_ERROR_PAGE_TABLE) {
1065 u32 pgtbl_err = I915_READ(PGTBL_ER);
1066 printk(KERN_ERR "page table error\n");
1067 printk(KERN_ERR " PGTBL_ER: 0x%08x\n",
1068 pgtbl_err);
1069 I915_WRITE(PGTBL_ER, pgtbl_err);
1070 POSTING_READ(PGTBL_ER);
1071 }
1072 }
1073
1074 if (!IS_GEN2(dev)) {
1075 if (eir & I915_ERROR_PAGE_TABLE) {
1076 u32 pgtbl_err = I915_READ(PGTBL_ER);
1077 printk(KERN_ERR "page table error\n");
1078 printk(KERN_ERR " PGTBL_ER: 0x%08x\n",
1079 pgtbl_err);
1080 I915_WRITE(PGTBL_ER, pgtbl_err);
1081 POSTING_READ(PGTBL_ER);
1082 }
1083 }
1084
1085 if (eir & I915_ERROR_MEMORY_REFRESH) {
1086 printk(KERN_ERR "memory refresh error:\n");
1087 for_each_pipe(pipe)
1088 printk(KERN_ERR "pipe %c stat: 0x%08x\n",
1089 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
1090 /* pipestat has already been acked */
1091 }
1092 if (eir & I915_ERROR_INSTRUCTION) {
1093 printk(KERN_ERR "instruction error\n");
1094 printk(KERN_ERR " INSTPM: 0x%08x\n",
1095 I915_READ(INSTPM));
1096 if (INTEL_INFO(dev)->gen < 4) {
1097 u32 ipeir = I915_READ(IPEIR);
1098
1099 printk(KERN_ERR " IPEIR: 0x%08x\n",
1100 I915_READ(IPEIR));
1101 printk(KERN_ERR " IPEHR: 0x%08x\n",
1102 I915_READ(IPEHR));
1103 printk(KERN_ERR " INSTDONE: 0x%08x\n",
1104 I915_READ(INSTDONE));
1105 printk(KERN_ERR " ACTHD: 0x%08x\n",
1106 I915_READ(ACTHD));
1107 I915_WRITE(IPEIR, ipeir);
1108 POSTING_READ(IPEIR);
1109 } else {
1110 u32 ipeir = I915_READ(IPEIR_I965);
1111
1112 printk(KERN_ERR " IPEIR: 0x%08x\n",
1113 I915_READ(IPEIR_I965));
1114 printk(KERN_ERR " IPEHR: 0x%08x\n",
1115 I915_READ(IPEHR_I965));
1116 printk(KERN_ERR " INSTDONE: 0x%08x\n",
1117 I915_READ(INSTDONE_I965));
1118 printk(KERN_ERR " INSTPS: 0x%08x\n",
1119 I915_READ(INSTPS));
1120 printk(KERN_ERR " INSTDONE1: 0x%08x\n",
1121 I915_READ(INSTDONE1));
1122 printk(KERN_ERR " ACTHD: 0x%08x\n",
1123 I915_READ(ACTHD_I965));
1124 I915_WRITE(IPEIR_I965, ipeir);
1125 POSTING_READ(IPEIR_I965);
1126 }
1127 }
1128
1129 I915_WRITE(EIR, eir);
1130 POSTING_READ(EIR);
1131 eir = I915_READ(EIR);
1132 if (eir) {
1133 /*
1134 * some errors might have become stuck,
1135 * mask them.
1136 */
1137 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
1138 I915_WRITE(EMR, I915_READ(EMR) | eir);
1139 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
1140 }
1141 }
1142
1143 /**
1144 * i915_handle_error - handle an error interrupt
1145 * @dev: drm device
1146 *
1147 * Do some basic checking of regsiter state at error interrupt time and
1148 * dump it to the syslog. Also call i915_capture_error_state() to make
1149 * sure we get a record and make it available in debugfs. Fire a uevent
1150 * so userspace knows something bad happened (should trigger collection
1151 * of a ring dump etc.).
1152 */
1153 void i915_handle_error(struct drm_device *dev, bool wedged)
1154 {
1155 struct drm_i915_private *dev_priv = dev->dev_private;
1156
1157 i915_capture_error_state(dev);
1158 i915_report_and_clear_eir(dev);
1159
1160 if (wedged) {
1161 INIT_COMPLETION(dev_priv->error_completion);
1162 atomic_set(&dev_priv->mm.wedged, 1);
1163
1164 /*
1165 * Wakeup waiting processes so they don't hang
1166 */
1167 wake_up_all(&dev_priv->ring[RCS].irq_queue);
1168 if (HAS_BSD(dev))
1169 wake_up_all(&dev_priv->ring[VCS].irq_queue);
1170 if (HAS_BLT(dev))
1171 wake_up_all(&dev_priv->ring[BCS].irq_queue);
1172 }
1173
1174 queue_work(dev_priv->wq, &dev_priv->error_work);
1175 }
1176
1177 static void i915_pageflip_stall_check(struct drm_device *dev, int pipe)
1178 {
1179 drm_i915_private_t *dev_priv = dev->dev_private;
1180 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1181 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1182 struct drm_i915_gem_object *obj;
1183 struct intel_unpin_work *work;
1184 unsigned long flags;
1185 bool stall_detected;
1186
1187 /* Ignore early vblank irqs */
1188 if (intel_crtc == NULL)
1189 return;
1190
1191 spin_lock_irqsave(&dev->event_lock, flags);
1192 work = intel_crtc->unpin_work;
1193
1194 if (work == NULL || work->pending || !work->enable_stall_check) {
1195 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
1196 spin_unlock_irqrestore(&dev->event_lock, flags);
1197 return;
1198 }
1199
1200 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
1201 obj = work->pending_flip_obj;
1202 if (INTEL_INFO(dev)->gen >= 4) {
1203 int dspsurf = DSPSURF(intel_crtc->plane);
1204 stall_detected = I915_READ(dspsurf) == obj->gtt_offset;
1205 } else {
1206 int dspaddr = DSPADDR(intel_crtc->plane);
1207 stall_detected = I915_READ(dspaddr) == (obj->gtt_offset +
1208 crtc->y * crtc->fb->pitches[0] +
1209 crtc->x * crtc->fb->bits_per_pixel/8);
1210 }
1211
1212 spin_unlock_irqrestore(&dev->event_lock, flags);
1213
1214 if (stall_detected) {
1215 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
1216 intel_prepare_page_flip(dev, intel_crtc->plane);
1217 }
1218 }
1219
1220 static irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
1221 {
1222 struct drm_device *dev = (struct drm_device *) arg;
1223 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1224 struct drm_i915_master_private *master_priv;
1225 u32 iir, new_iir;
1226 u32 pipe_stats[I915_MAX_PIPES];
1227 u32 vblank_status;
1228 int vblank = 0;
1229 unsigned long irqflags;
1230 int irq_received;
1231 int ret = IRQ_NONE, pipe;
1232 bool blc_event = false;
1233
1234 atomic_inc(&dev_priv->irq_received);
1235
1236 iir = I915_READ(IIR);
1237
1238 if (INTEL_INFO(dev)->gen >= 4)
1239 vblank_status = PIPE_START_VBLANK_INTERRUPT_STATUS;
1240 else
1241 vblank_status = PIPE_VBLANK_INTERRUPT_STATUS;
1242
1243 for (;;) {
1244 irq_received = iir != 0;
1245
1246 /* Can't rely on pipestat interrupt bit in iir as it might
1247 * have been cleared after the pipestat interrupt was received.
1248 * It doesn't set the bit in iir again, but it still produces
1249 * interrupts (for non-MSI).
1250 */
1251 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1252 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
1253 i915_handle_error(dev, false);
1254
1255 for_each_pipe(pipe) {
1256 int reg = PIPESTAT(pipe);
1257 pipe_stats[pipe] = I915_READ(reg);
1258
1259 /*
1260 * Clear the PIPE*STAT regs before the IIR
1261 */
1262 if (pipe_stats[pipe] & 0x8000ffff) {
1263 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1264 DRM_DEBUG_DRIVER("pipe %c underrun\n",
1265 pipe_name(pipe));
1266 I915_WRITE(reg, pipe_stats[pipe]);
1267 irq_received = 1;
1268 }
1269 }
1270 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1271
1272 if (!irq_received)
1273 break;
1274
1275 ret = IRQ_HANDLED;
1276
1277 /* Consume port. Then clear IIR or we'll miss events */
1278 if ((I915_HAS_HOTPLUG(dev)) &&
1279 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
1280 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
1281
1282 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
1283 hotplug_status);
1284 if (hotplug_status & dev_priv->hotplug_supported_mask)
1285 queue_work(dev_priv->wq,
1286 &dev_priv->hotplug_work);
1287
1288 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
1289 I915_READ(PORT_HOTPLUG_STAT);
1290 }
1291
1292 I915_WRITE(IIR, iir);
1293 new_iir = I915_READ(IIR); /* Flush posted writes */
1294
1295 if (dev->primary->master) {
1296 master_priv = dev->primary->master->driver_priv;
1297 if (master_priv->sarea_priv)
1298 master_priv->sarea_priv->last_dispatch =
1299 READ_BREADCRUMB(dev_priv);
1300 }
1301
1302 if (iir & I915_USER_INTERRUPT)
1303 notify_ring(dev, &dev_priv->ring[RCS]);
1304 if (iir & I915_BSD_USER_INTERRUPT)
1305 notify_ring(dev, &dev_priv->ring[VCS]);
1306
1307 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) {
1308 intel_prepare_page_flip(dev, 0);
1309 if (dev_priv->flip_pending_is_done)
1310 intel_finish_page_flip_plane(dev, 0);
1311 }
1312
1313 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) {
1314 intel_prepare_page_flip(dev, 1);
1315 if (dev_priv->flip_pending_is_done)
1316 intel_finish_page_flip_plane(dev, 1);
1317 }
1318
1319 for_each_pipe(pipe) {
1320 if (pipe_stats[pipe] & vblank_status &&
1321 drm_handle_vblank(dev, pipe)) {
1322 vblank++;
1323 if (!dev_priv->flip_pending_is_done) {
1324 i915_pageflip_stall_check(dev, pipe);
1325 intel_finish_page_flip(dev, pipe);
1326 }
1327 }
1328
1329 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
1330 blc_event = true;
1331 }
1332
1333
1334 if (blc_event || (iir & I915_ASLE_INTERRUPT))
1335 intel_opregion_asle_intr(dev);
1336
1337 /* With MSI, interrupts are only generated when iir
1338 * transitions from zero to nonzero. If another bit got
1339 * set while we were handling the existing iir bits, then
1340 * we would never get another interrupt.
1341 *
1342 * This is fine on non-MSI as well, as if we hit this path
1343 * we avoid exiting the interrupt handler only to generate
1344 * another one.
1345 *
1346 * Note that for MSI this could cause a stray interrupt report
1347 * if an interrupt landed in the time between writing IIR and
1348 * the posting read. This should be rare enough to never
1349 * trigger the 99% of 100,000 interrupts test for disabling
1350 * stray interrupts.
1351 */
1352 iir = new_iir;
1353 }
1354
1355 return ret;
1356 }
1357
1358 static int i915_emit_irq(struct drm_device * dev)
1359 {
1360 drm_i915_private_t *dev_priv = dev->dev_private;
1361 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
1362
1363 i915_kernel_lost_context(dev);
1364
1365 DRM_DEBUG_DRIVER("\n");
1366
1367 dev_priv->counter++;
1368 if (dev_priv->counter > 0x7FFFFFFFUL)
1369 dev_priv->counter = 1;
1370 if (master_priv->sarea_priv)
1371 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
1372
1373 if (BEGIN_LP_RING(4) == 0) {
1374 OUT_RING(MI_STORE_DWORD_INDEX);
1375 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
1376 OUT_RING(dev_priv->counter);
1377 OUT_RING(MI_USER_INTERRUPT);
1378 ADVANCE_LP_RING();
1379 }
1380
1381 return dev_priv->counter;
1382 }
1383
1384 static int i915_wait_irq(struct drm_device * dev, int irq_nr)
1385 {
1386 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1387 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
1388 int ret = 0;
1389 struct intel_ring_buffer *ring = LP_RING(dev_priv);
1390
1391 DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr,
1392 READ_BREADCRUMB(dev_priv));
1393
1394 if (READ_BREADCRUMB(dev_priv) >= irq_nr) {
1395 if (master_priv->sarea_priv)
1396 master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
1397 return 0;
1398 }
1399
1400 if (master_priv->sarea_priv)
1401 master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
1402
1403 if (ring->irq_get(ring)) {
1404 DRM_WAIT_ON(ret, ring->irq_queue, 3 * DRM_HZ,
1405 READ_BREADCRUMB(dev_priv) >= irq_nr);
1406 ring->irq_put(ring);
1407 } else if (wait_for(READ_BREADCRUMB(dev_priv) >= irq_nr, 3000))
1408 ret = -EBUSY;
1409
1410 if (ret == -EBUSY) {
1411 DRM_ERROR("EBUSY -- rec: %d emitted: %d\n",
1412 READ_BREADCRUMB(dev_priv), (int)dev_priv->counter);
1413 }
1414
1415 return ret;
1416 }
1417
1418 /* Needs the lock as it touches the ring.
1419 */
1420 int i915_irq_emit(struct drm_device *dev, void *data,
1421 struct drm_file *file_priv)
1422 {
1423 drm_i915_private_t *dev_priv = dev->dev_private;
1424 drm_i915_irq_emit_t *emit = data;
1425 int result;
1426
1427 if (!dev_priv || !LP_RING(dev_priv)->virtual_start) {
1428 DRM_ERROR("called with no initialization\n");
1429 return -EINVAL;
1430 }
1431
1432 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
1433
1434 mutex_lock(&dev->struct_mutex);
1435 result = i915_emit_irq(dev);
1436 mutex_unlock(&dev->struct_mutex);
1437
1438 if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) {
1439 DRM_ERROR("copy_to_user\n");
1440 return -EFAULT;
1441 }
1442
1443 return 0;
1444 }
1445
1446 /* Doesn't need the hardware lock.
1447 */
1448 int i915_irq_wait(struct drm_device *dev, void *data,
1449 struct drm_file *file_priv)
1450 {
1451 drm_i915_private_t *dev_priv = dev->dev_private;
1452 drm_i915_irq_wait_t *irqwait = data;
1453
1454 if (!dev_priv) {
1455 DRM_ERROR("called with no initialization\n");
1456 return -EINVAL;
1457 }
1458
1459 return i915_wait_irq(dev, irqwait->irq_seq);
1460 }
1461
1462 /* Called from drm generic code, passed 'crtc' which
1463 * we use as a pipe index
1464 */
1465 static int i915_enable_vblank(struct drm_device *dev, int pipe)
1466 {
1467 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1468 unsigned long irqflags;
1469
1470 if (!i915_pipe_enabled(dev, pipe))
1471 return -EINVAL;
1472
1473 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1474 if (INTEL_INFO(dev)->gen >= 4)
1475 i915_enable_pipestat(dev_priv, pipe,
1476 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1477 else
1478 i915_enable_pipestat(dev_priv, pipe,
1479 PIPE_VBLANK_INTERRUPT_ENABLE);
1480
1481 /* maintain vblank delivery even in deep C-states */
1482 if (dev_priv->info->gen == 3)
1483 I915_WRITE(INSTPM, INSTPM_AGPBUSY_DIS << 16);
1484 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1485
1486 return 0;
1487 }
1488
1489 static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
1490 {
1491 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1492 unsigned long irqflags;
1493
1494 if (!i915_pipe_enabled(dev, pipe))
1495 return -EINVAL;
1496
1497 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1498 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
1499 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
1500 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1501
1502 return 0;
1503 }
1504
1505 static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
1506 {
1507 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1508 unsigned long irqflags;
1509
1510 if (!i915_pipe_enabled(dev, pipe))
1511 return -EINVAL;
1512
1513 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1514 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
1515 DE_PIPEA_VBLANK_IVB : DE_PIPEB_VBLANK_IVB);
1516 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1517
1518 return 0;
1519 }
1520
1521 /* Called from drm generic code, passed 'crtc' which
1522 * we use as a pipe index
1523 */
1524 static void i915_disable_vblank(struct drm_device *dev, int pipe)
1525 {
1526 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1527 unsigned long irqflags;
1528
1529 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1530 if (dev_priv->info->gen == 3)
1531 I915_WRITE(INSTPM,
1532 INSTPM_AGPBUSY_DIS << 16 | INSTPM_AGPBUSY_DIS);
1533
1534 i915_disable_pipestat(dev_priv, pipe,
1535 PIPE_VBLANK_INTERRUPT_ENABLE |
1536 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1537 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1538 }
1539
1540 static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
1541 {
1542 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1543 unsigned long irqflags;
1544
1545 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1546 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
1547 DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
1548 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1549 }
1550
1551 static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
1552 {
1553 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1554 unsigned long irqflags;
1555
1556 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
1557 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
1558 DE_PIPEA_VBLANK_IVB : DE_PIPEB_VBLANK_IVB);
1559 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
1560 }
1561
1562 /* Set the vblank monitor pipe
1563 */
1564 int i915_vblank_pipe_set(struct drm_device *dev, void *data,
1565 struct drm_file *file_priv)
1566 {
1567 drm_i915_private_t *dev_priv = dev->dev_private;
1568
1569 if (!dev_priv) {
1570 DRM_ERROR("called with no initialization\n");
1571 return -EINVAL;
1572 }
1573
1574 return 0;
1575 }
1576
1577 int i915_vblank_pipe_get(struct drm_device *dev, void *data,
1578 struct drm_file *file_priv)
1579 {
1580 drm_i915_private_t *dev_priv = dev->dev_private;
1581 drm_i915_vblank_pipe_t *pipe = data;
1582
1583 if (!dev_priv) {
1584 DRM_ERROR("called with no initialization\n");
1585 return -EINVAL;
1586 }
1587
1588 pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
1589
1590 return 0;
1591 }
1592
1593 /**
1594 * Schedule buffer swap at given vertical blank.
1595 */
1596 int i915_vblank_swap(struct drm_device *dev, void *data,
1597 struct drm_file *file_priv)
1598 {
1599 /* The delayed swap mechanism was fundamentally racy, and has been
1600 * removed. The model was that the client requested a delayed flip/swap
1601 * from the kernel, then waited for vblank before continuing to perform
1602 * rendering. The problem was that the kernel might wake the client
1603 * up before it dispatched the vblank swap (since the lock has to be
1604 * held while touching the ringbuffer), in which case the client would
1605 * clear and start the next frame before the swap occurred, and
1606 * flicker would occur in addition to likely missing the vblank.
1607 *
1608 * In the absence of this ioctl, userland falls back to a correct path
1609 * of waiting for a vblank, then dispatching the swap on its own.
1610 * Context switching to userland and back is plenty fast enough for
1611 * meeting the requirements of vblank swapping.
1612 */
1613 return -EINVAL;
1614 }
1615
1616 static u32
1617 ring_last_seqno(struct intel_ring_buffer *ring)
1618 {
1619 return list_entry(ring->request_list.prev,
1620 struct drm_i915_gem_request, list)->seqno;
1621 }
1622
1623 static bool i915_hangcheck_ring_idle(struct intel_ring_buffer *ring, bool *err)
1624 {
1625 if (list_empty(&ring->request_list) ||
1626 i915_seqno_passed(ring->get_seqno(ring), ring_last_seqno(ring))) {
1627 /* Issue a wake-up to catch stuck h/w. */
1628 if (ring->waiting_seqno && waitqueue_active(&ring->irq_queue)) {
1629 DRM_ERROR("Hangcheck timer elapsed... %s idle [waiting on %d, at %d], missed IRQ?\n",
1630 ring->name,
1631 ring->waiting_seqno,
1632 ring->get_seqno(ring));
1633 wake_up_all(&ring->irq_queue);
1634 *err = true;
1635 }
1636 return true;
1637 }
1638 return false;
1639 }
1640
1641 static bool kick_ring(struct intel_ring_buffer *ring)
1642 {
1643 struct drm_device *dev = ring->dev;
1644 struct drm_i915_private *dev_priv = dev->dev_private;
1645 u32 tmp = I915_READ_CTL(ring);
1646 if (tmp & RING_WAIT) {
1647 DRM_ERROR("Kicking stuck wait on %s\n",
1648 ring->name);
1649 I915_WRITE_CTL(ring, tmp);
1650 return true;
1651 }
1652 return false;
1653 }
1654
1655 /**
1656 * This is called when the chip hasn't reported back with completed
1657 * batchbuffers in a long time. The first time this is called we simply record
1658 * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses
1659 * again, we assume the chip is wedged and try to fix it.
1660 */
1661 void i915_hangcheck_elapsed(unsigned long data)
1662 {
1663 struct drm_device *dev = (struct drm_device *)data;
1664 drm_i915_private_t *dev_priv = dev->dev_private;
1665 uint32_t acthd, instdone, instdone1, acthd_bsd, acthd_blt;
1666 bool err = false;
1667
1668 if (!i915_enable_hangcheck)
1669 return;
1670
1671 /* If all work is done then ACTHD clearly hasn't advanced. */
1672 if (i915_hangcheck_ring_idle(&dev_priv->ring[RCS], &err) &&
1673 i915_hangcheck_ring_idle(&dev_priv->ring[VCS], &err) &&
1674 i915_hangcheck_ring_idle(&dev_priv->ring[BCS], &err)) {
1675 dev_priv->hangcheck_count = 0;
1676 if (err)
1677 goto repeat;
1678 return;
1679 }
1680
1681 if (INTEL_INFO(dev)->gen < 4) {
1682 instdone = I915_READ(INSTDONE);
1683 instdone1 = 0;
1684 } else {
1685 instdone = I915_READ(INSTDONE_I965);
1686 instdone1 = I915_READ(INSTDONE1);
1687 }
1688 acthd = intel_ring_get_active_head(&dev_priv->ring[RCS]);
1689 acthd_bsd = HAS_BSD(dev) ?
1690 intel_ring_get_active_head(&dev_priv->ring[VCS]) : 0;
1691 acthd_blt = HAS_BLT(dev) ?
1692 intel_ring_get_active_head(&dev_priv->ring[BCS]) : 0;
1693
1694 if (dev_priv->last_acthd == acthd &&
1695 dev_priv->last_acthd_bsd == acthd_bsd &&
1696 dev_priv->last_acthd_blt == acthd_blt &&
1697 dev_priv->last_instdone == instdone &&
1698 dev_priv->last_instdone1 == instdone1) {
1699 if (dev_priv->hangcheck_count++ > 1) {
1700 DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
1701
1702 if (!IS_GEN2(dev)) {
1703 /* Is the chip hanging on a WAIT_FOR_EVENT?
1704 * If so we can simply poke the RB_WAIT bit
1705 * and break the hang. This should work on
1706 * all but the second generation chipsets.
1707 */
1708
1709 if (kick_ring(&dev_priv->ring[RCS]))
1710 goto repeat;
1711
1712 if (HAS_BSD(dev) &&
1713 kick_ring(&dev_priv->ring[VCS]))
1714 goto repeat;
1715
1716 if (HAS_BLT(dev) &&
1717 kick_ring(&dev_priv->ring[BCS]))
1718 goto repeat;
1719 }
1720
1721 i915_handle_error(dev, true);
1722 return;
1723 }
1724 } else {
1725 dev_priv->hangcheck_count = 0;
1726
1727 dev_priv->last_acthd = acthd;
1728 dev_priv->last_acthd_bsd = acthd_bsd;
1729 dev_priv->last_acthd_blt = acthd_blt;
1730 dev_priv->last_instdone = instdone;
1731 dev_priv->last_instdone1 = instdone1;
1732 }
1733
1734 repeat:
1735 /* Reset timer case chip hangs without another request being added */
1736 mod_timer(&dev_priv->hangcheck_timer,
1737 jiffies + msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
1738 }
1739
1740 /* drm_dma.h hooks
1741 */
1742 static void ironlake_irq_preinstall(struct drm_device *dev)
1743 {
1744 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1745
1746 atomic_set(&dev_priv->irq_received, 0);
1747
1748 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
1749 INIT_WORK(&dev_priv->error_work, i915_error_work_func);
1750 if (IS_GEN6(dev) || IS_IVYBRIDGE(dev))
1751 INIT_WORK(&dev_priv->rps_work, gen6_pm_rps_work);
1752
1753 I915_WRITE(HWSTAM, 0xeffe);
1754
1755 if (IS_GEN6(dev)) {
1756 /* Workaround stalls observed on Sandy Bridge GPUs by
1757 * making the blitter command streamer generate a
1758 * write to the Hardware Status Page for
1759 * MI_USER_INTERRUPT. This appears to serialize the
1760 * previous seqno write out before the interrupt
1761 * happens.
1762 */
1763 I915_WRITE(GEN6_BLITTER_HWSTAM, ~GEN6_BLITTER_USER_INTERRUPT);
1764 I915_WRITE(GEN6_BSD_HWSTAM, ~GEN6_BSD_USER_INTERRUPT);
1765 }
1766
1767 /* XXX hotplug from PCH */
1768
1769 I915_WRITE(DEIMR, 0xffffffff);
1770 I915_WRITE(DEIER, 0x0);
1771 POSTING_READ(DEIER);
1772
1773 /* and GT */
1774 I915_WRITE(GTIMR, 0xffffffff);
1775 I915_WRITE(GTIER, 0x0);
1776 POSTING_READ(GTIER);
1777
1778 /* south display irq */
1779 I915_WRITE(SDEIMR, 0xffffffff);
1780 I915_WRITE(SDEIER, 0x0);
1781 POSTING_READ(SDEIER);
1782 }
1783
1784 /*
1785 * Enable digital hotplug on the PCH, and configure the DP short pulse
1786 * duration to 2ms (which is the minimum in the Display Port spec)
1787 *
1788 * This register is the same on all known PCH chips.
1789 */
1790
1791 static void ironlake_enable_pch_hotplug(struct drm_device *dev)
1792 {
1793 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1794 u32 hotplug;
1795
1796 hotplug = I915_READ(PCH_PORT_HOTPLUG);
1797 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
1798 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
1799 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
1800 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
1801 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
1802 }
1803
1804 static int ironlake_irq_postinstall(struct drm_device *dev)
1805 {
1806 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1807 /* enable kind of interrupts always enabled */
1808 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
1809 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE;
1810 u32 render_irqs;
1811 u32 hotplug_mask;
1812
1813 DRM_INIT_WAITQUEUE(&dev_priv->ring[RCS].irq_queue);
1814 if (HAS_BSD(dev))
1815 DRM_INIT_WAITQUEUE(&dev_priv->ring[VCS].irq_queue);
1816 if (HAS_BLT(dev))
1817 DRM_INIT_WAITQUEUE(&dev_priv->ring[BCS].irq_queue);
1818
1819 dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
1820 dev_priv->irq_mask = ~display_mask;
1821
1822 /* should always can generate irq */
1823 I915_WRITE(DEIIR, I915_READ(DEIIR));
1824 I915_WRITE(DEIMR, dev_priv->irq_mask);
1825 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK);
1826 POSTING_READ(DEIER);
1827
1828 dev_priv->gt_irq_mask = ~0;
1829
1830 I915_WRITE(GTIIR, I915_READ(GTIIR));
1831 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1832
1833 if (IS_GEN6(dev))
1834 render_irqs =
1835 GT_USER_INTERRUPT |
1836 GT_GEN6_BSD_USER_INTERRUPT |
1837 GT_BLT_USER_INTERRUPT;
1838 else
1839 render_irqs =
1840 GT_USER_INTERRUPT |
1841 GT_PIPE_NOTIFY |
1842 GT_BSD_USER_INTERRUPT;
1843 I915_WRITE(GTIER, render_irqs);
1844 POSTING_READ(GTIER);
1845
1846 if (HAS_PCH_CPT(dev)) {
1847 hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1848 SDE_PORTB_HOTPLUG_CPT |
1849 SDE_PORTC_HOTPLUG_CPT |
1850 SDE_PORTD_HOTPLUG_CPT);
1851 } else {
1852 hotplug_mask = (SDE_CRT_HOTPLUG |
1853 SDE_PORTB_HOTPLUG |
1854 SDE_PORTC_HOTPLUG |
1855 SDE_PORTD_HOTPLUG |
1856 SDE_AUX_MASK);
1857 }
1858
1859 dev_priv->pch_irq_mask = ~hotplug_mask;
1860
1861 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1862 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
1863 I915_WRITE(SDEIER, hotplug_mask);
1864 POSTING_READ(SDEIER);
1865
1866 ironlake_enable_pch_hotplug(dev);
1867
1868 if (IS_IRONLAKE_M(dev)) {
1869 /* Clear & enable PCU event interrupts */
1870 I915_WRITE(DEIIR, DE_PCU_EVENT);
1871 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
1872 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
1873 }
1874
1875 return 0;
1876 }
1877
1878 static int ivybridge_irq_postinstall(struct drm_device *dev)
1879 {
1880 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1881 /* enable kind of interrupts always enabled */
1882 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
1883 DE_PCH_EVENT_IVB | DE_PLANEA_FLIP_DONE_IVB |
1884 DE_PLANEB_FLIP_DONE_IVB;
1885 u32 render_irqs;
1886 u32 hotplug_mask;
1887
1888 DRM_INIT_WAITQUEUE(&dev_priv->ring[RCS].irq_queue);
1889 if (HAS_BSD(dev))
1890 DRM_INIT_WAITQUEUE(&dev_priv->ring[VCS].irq_queue);
1891 if (HAS_BLT(dev))
1892 DRM_INIT_WAITQUEUE(&dev_priv->ring[BCS].irq_queue);
1893
1894 dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
1895 dev_priv->irq_mask = ~display_mask;
1896
1897 /* should always can generate irq */
1898 I915_WRITE(DEIIR, I915_READ(DEIIR));
1899 I915_WRITE(DEIMR, dev_priv->irq_mask);
1900 I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK_IVB |
1901 DE_PIPEB_VBLANK_IVB);
1902 POSTING_READ(DEIER);
1903
1904 dev_priv->gt_irq_mask = ~0;
1905
1906 I915_WRITE(GTIIR, I915_READ(GTIIR));
1907 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
1908
1909 render_irqs = GT_USER_INTERRUPT | GT_GEN6_BSD_USER_INTERRUPT |
1910 GT_BLT_USER_INTERRUPT;
1911 I915_WRITE(GTIER, render_irqs);
1912 POSTING_READ(GTIER);
1913
1914 hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
1915 SDE_PORTB_HOTPLUG_CPT |
1916 SDE_PORTC_HOTPLUG_CPT |
1917 SDE_PORTD_HOTPLUG_CPT);
1918 dev_priv->pch_irq_mask = ~hotplug_mask;
1919
1920 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1921 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
1922 I915_WRITE(SDEIER, hotplug_mask);
1923 POSTING_READ(SDEIER);
1924
1925 ironlake_enable_pch_hotplug(dev);
1926
1927 return 0;
1928 }
1929
1930 static void i915_driver_irq_preinstall(struct drm_device * dev)
1931 {
1932 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1933 int pipe;
1934
1935 atomic_set(&dev_priv->irq_received, 0);
1936
1937 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
1938 INIT_WORK(&dev_priv->error_work, i915_error_work_func);
1939
1940 if (I915_HAS_HOTPLUG(dev)) {
1941 I915_WRITE(PORT_HOTPLUG_EN, 0);
1942 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
1943 }
1944
1945 I915_WRITE(HWSTAM, 0xeffe);
1946 for_each_pipe(pipe)
1947 I915_WRITE(PIPESTAT(pipe), 0);
1948 I915_WRITE(IMR, 0xffffffff);
1949 I915_WRITE(IER, 0x0);
1950 POSTING_READ(IER);
1951 }
1952
1953 /*
1954 * Must be called after intel_modeset_init or hotplug interrupts won't be
1955 * enabled correctly.
1956 */
1957 static int i915_driver_irq_postinstall(struct drm_device *dev)
1958 {
1959 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1960 u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR;
1961 u32 error_mask;
1962
1963 dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
1964
1965 /* Unmask the interrupts that we always want on. */
1966 dev_priv->irq_mask = ~I915_INTERRUPT_ENABLE_FIX;
1967
1968 dev_priv->pipestat[0] = 0;
1969 dev_priv->pipestat[1] = 0;
1970
1971 if (I915_HAS_HOTPLUG(dev)) {
1972 /* Enable in IER... */
1973 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
1974 /* and unmask in IMR */
1975 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
1976 }
1977
1978 /*
1979 * Enable some error detection, note the instruction error mask
1980 * bit is reserved, so we leave it masked.
1981 */
1982 if (IS_G4X(dev)) {
1983 error_mask = ~(GM45_ERROR_PAGE_TABLE |
1984 GM45_ERROR_MEM_PRIV |
1985 GM45_ERROR_CP_PRIV |
1986 I915_ERROR_MEMORY_REFRESH);
1987 } else {
1988 error_mask = ~(I915_ERROR_PAGE_TABLE |
1989 I915_ERROR_MEMORY_REFRESH);
1990 }
1991 I915_WRITE(EMR, error_mask);
1992
1993 I915_WRITE(IMR, dev_priv->irq_mask);
1994 I915_WRITE(IER, enable_mask);
1995 POSTING_READ(IER);
1996
1997 if (I915_HAS_HOTPLUG(dev)) {
1998 u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
1999
2000 /* Note HDMI and DP share bits */
2001 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
2002 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
2003 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
2004 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
2005 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
2006 hotplug_en |= HDMID_HOTPLUG_INT_EN;
2007 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
2008 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
2009 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
2010 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
2011 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
2012 hotplug_en |= CRT_HOTPLUG_INT_EN;
2013
2014 /* Programming the CRT detection parameters tends
2015 to generate a spurious hotplug event about three
2016 seconds later. So just do it once.
2017 */
2018 if (IS_G4X(dev))
2019 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
2020 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
2021 }
2022
2023 /* Ignore TV since it's buggy */
2024
2025 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
2026 }
2027
2028 intel_opregion_enable_asle(dev);
2029
2030 return 0;
2031 }
2032
2033 static void ironlake_irq_uninstall(struct drm_device *dev)
2034 {
2035 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2036
2037 if (!dev_priv)
2038 return;
2039
2040 dev_priv->vblank_pipe = 0;
2041
2042 I915_WRITE(HWSTAM, 0xffffffff);
2043
2044 I915_WRITE(DEIMR, 0xffffffff);
2045 I915_WRITE(DEIER, 0x0);
2046 I915_WRITE(DEIIR, I915_READ(DEIIR));
2047
2048 I915_WRITE(GTIMR, 0xffffffff);
2049 I915_WRITE(GTIER, 0x0);
2050 I915_WRITE(GTIIR, I915_READ(GTIIR));
2051
2052 I915_WRITE(SDEIMR, 0xffffffff);
2053 I915_WRITE(SDEIER, 0x0);
2054 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2055 }
2056
2057 static void i915_driver_irq_uninstall(struct drm_device * dev)
2058 {
2059 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2060 int pipe;
2061
2062 if (!dev_priv)
2063 return;
2064
2065 dev_priv->vblank_pipe = 0;
2066
2067 if (I915_HAS_HOTPLUG(dev)) {
2068 I915_WRITE(PORT_HOTPLUG_EN, 0);
2069 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2070 }
2071
2072 I915_WRITE(HWSTAM, 0xffffffff);
2073 for_each_pipe(pipe)
2074 I915_WRITE(PIPESTAT(pipe), 0);
2075 I915_WRITE(IMR, 0xffffffff);
2076 I915_WRITE(IER, 0x0);
2077
2078 for_each_pipe(pipe)
2079 I915_WRITE(PIPESTAT(pipe),
2080 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
2081 I915_WRITE(IIR, I915_READ(IIR));
2082 }
2083
2084 void intel_irq_init(struct drm_device *dev)
2085 {
2086 dev->driver->get_vblank_counter = i915_get_vblank_counter;
2087 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
2088 if (IS_G4X(dev) || IS_GEN5(dev) || IS_GEN6(dev) || IS_IVYBRIDGE(dev)) {
2089 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
2090 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
2091 }
2092
2093 if (drm_core_check_feature(dev, DRIVER_MODESET))
2094 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
2095 else
2096 dev->driver->get_vblank_timestamp = NULL;
2097 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
2098
2099 if (IS_IVYBRIDGE(dev)) {
2100 /* Share pre & uninstall handlers with ILK/SNB */
2101 dev->driver->irq_handler = ivybridge_irq_handler;
2102 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2103 dev->driver->irq_postinstall = ivybridge_irq_postinstall;
2104 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2105 dev->driver->enable_vblank = ivybridge_enable_vblank;
2106 dev->driver->disable_vblank = ivybridge_disable_vblank;
2107 } else if (HAS_PCH_SPLIT(dev)) {
2108 dev->driver->irq_handler = ironlake_irq_handler;
2109 dev->driver->irq_preinstall = ironlake_irq_preinstall;
2110 dev->driver->irq_postinstall = ironlake_irq_postinstall;
2111 dev->driver->irq_uninstall = ironlake_irq_uninstall;
2112 dev->driver->enable_vblank = ironlake_enable_vblank;
2113 dev->driver->disable_vblank = ironlake_disable_vblank;
2114 } else {
2115 dev->driver->irq_preinstall = i915_driver_irq_preinstall;
2116 dev->driver->irq_postinstall = i915_driver_irq_postinstall;
2117 dev->driver->irq_uninstall = i915_driver_irq_uninstall;
2118 dev->driver->irq_handler = i915_driver_irq_handler;
2119 dev->driver->enable_vblank = i915_enable_vblank;
2120 dev->driver->disable_vblank = i915_disable_vblank;
2121 }
2122 }