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drm/i915: Add initial bits for VGA modesetting bringup on Sandybridge.
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / gpu / drm / i915 / i915_irq.c
blobef79d9423f0af2ccfe3c9dedbff5f24ebc3c10c6
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 "drmP.h"
31 #include "drm.h"
32 #include "i915_drm.h"
33 #include "i915_drv.h"
34 #include "i915_trace.h"
35 #include "intel_drv.h"
36
37 #define MAX_NOPID ((u32)~0)
38
39 /**
40 * Interrupts that are always left unmasked.
41 *
42 * Since pipe events are edge-triggered from the PIPESTAT register to IIR,
43 * we leave them always unmasked in IMR and then control enabling them through
44 * PIPESTAT alone.
45 */
46 #define I915_INTERRUPT_ENABLE_FIX \
47 (I915_ASLE_INTERRUPT | \
48 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | \
49 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | \
50 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | \
51 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | \
52 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
53
54 /** Interrupts that we mask and unmask at runtime. */
55 #define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT)
56
57 #define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\
58 PIPE_VBLANK_INTERRUPT_STATUS)
59
60 #define I915_PIPE_VBLANK_ENABLE (PIPE_START_VBLANK_INTERRUPT_ENABLE |\
61 PIPE_VBLANK_INTERRUPT_ENABLE)
62
63 #define DRM_I915_VBLANK_PIPE_ALL (DRM_I915_VBLANK_PIPE_A | \
64 DRM_I915_VBLANK_PIPE_B)
65
66 void
67 ironlake_enable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask)
68 {
69 if ((dev_priv->gt_irq_mask_reg & mask) != 0) {
70 dev_priv->gt_irq_mask_reg &= ~mask;
71 I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg);
72 (void) I915_READ(GTIMR);
73 }
74 }
75
76 static inline void
77 ironlake_disable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask)
78 {
79 if ((dev_priv->gt_irq_mask_reg & mask) != mask) {
80 dev_priv->gt_irq_mask_reg |= mask;
81 I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg);
82 (void) I915_READ(GTIMR);
83 }
84 }
85
86 /* For display hotplug interrupt */
87 void
88 ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
89 {
90 if ((dev_priv->irq_mask_reg & mask) != 0) {
91 dev_priv->irq_mask_reg &= ~mask;
92 I915_WRITE(DEIMR, dev_priv->irq_mask_reg);
93 (void) I915_READ(DEIMR);
94 }
95 }
96
97 static inline void
98 ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
99 {
100 if ((dev_priv->irq_mask_reg & mask) != mask) {
101 dev_priv->irq_mask_reg |= mask;
102 I915_WRITE(DEIMR, dev_priv->irq_mask_reg);
103 (void) I915_READ(DEIMR);
104 }
105 }
106
107 void
108 i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask)
109 {
110 if ((dev_priv->irq_mask_reg & mask) != 0) {
111 dev_priv->irq_mask_reg &= ~mask;
112 I915_WRITE(IMR, dev_priv->irq_mask_reg);
113 (void) I915_READ(IMR);
114 }
115 }
116
117 static inline void
118 i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask)
119 {
120 if ((dev_priv->irq_mask_reg & mask) != mask) {
121 dev_priv->irq_mask_reg |= mask;
122 I915_WRITE(IMR, dev_priv->irq_mask_reg);
123 (void) I915_READ(IMR);
124 }
125 }
126
127 static inline u32
128 i915_pipestat(int pipe)
129 {
130 if (pipe == 0)
131 return PIPEASTAT;
132 if (pipe == 1)
133 return PIPEBSTAT;
134 BUG();
135 }
136
137 void
138 i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
139 {
140 if ((dev_priv->pipestat[pipe] & mask) != mask) {
141 u32 reg = i915_pipestat(pipe);
142
143 dev_priv->pipestat[pipe] |= mask;
144 /* Enable the interrupt, clear any pending status */
145 I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16));
146 (void) I915_READ(reg);
147 }
148 }
149
150 void
151 i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
152 {
153 if ((dev_priv->pipestat[pipe] & mask) != 0) {
154 u32 reg = i915_pipestat(pipe);
155
156 dev_priv->pipestat[pipe] &= ~mask;
157 I915_WRITE(reg, dev_priv->pipestat[pipe]);
158 (void) I915_READ(reg);
159 }
160 }
161
162 /**
163 * intel_enable_asle - enable ASLE interrupt for OpRegion
164 */
165 void intel_enable_asle (struct drm_device *dev)
166 {
167 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
168
169 if (IS_IRONLAKE(dev))
170 ironlake_enable_display_irq(dev_priv, DE_GSE);
171 else
172 i915_enable_pipestat(dev_priv, 1,
173 I915_LEGACY_BLC_EVENT_ENABLE);
174 }
175
176 /**
177 * i915_pipe_enabled - check if a pipe is enabled
178 * @dev: DRM device
179 * @pipe: pipe to check
180 *
181 * Reading certain registers when the pipe is disabled can hang the chip.
182 * Use this routine to make sure the PLL is running and the pipe is active
183 * before reading such registers if unsure.
184 */
185 static int
186 i915_pipe_enabled(struct drm_device *dev, int pipe)
187 {
188 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
189 unsigned long pipeconf = pipe ? PIPEBCONF : PIPEACONF;
190
191 if (I915_READ(pipeconf) & PIPEACONF_ENABLE)
192 return 1;
193
194 return 0;
195 }
196
197 /* Called from drm generic code, passed a 'crtc', which
198 * we use as a pipe index
199 */
200 u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
201 {
202 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
203 unsigned long high_frame;
204 unsigned long low_frame;
205 u32 high1, high2, low, count;
206
207 high_frame = pipe ? PIPEBFRAMEHIGH : PIPEAFRAMEHIGH;
208 low_frame = pipe ? PIPEBFRAMEPIXEL : PIPEAFRAMEPIXEL;
209
210 if (!i915_pipe_enabled(dev, pipe)) {
211 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
212 "pipe %d\n", pipe);
213 return 0;
214 }
215
216 /*
217 * High & low register fields aren't synchronized, so make sure
218 * we get a low value that's stable across two reads of the high
219 * register.
220 */
221 do {
222 high1 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
223 PIPE_FRAME_HIGH_SHIFT);
224 low = ((I915_READ(low_frame) & PIPE_FRAME_LOW_MASK) >>
225 PIPE_FRAME_LOW_SHIFT);
226 high2 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
227 PIPE_FRAME_HIGH_SHIFT);
228 } while (high1 != high2);
229
230 count = (high1 << 8) | low;
231
232 return count;
233 }
234
235 u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
236 {
237 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
238 int reg = pipe ? PIPEB_FRMCOUNT_GM45 : PIPEA_FRMCOUNT_GM45;
239
240 if (!i915_pipe_enabled(dev, pipe)) {
241 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
242 "pipe %d\n", pipe);
243 return 0;
244 }
245
246 return I915_READ(reg);
247 }
248
249 /*
250 * Handle hotplug events outside the interrupt handler proper.
251 */
252 static void i915_hotplug_work_func(struct work_struct *work)
253 {
254 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
255 hotplug_work);
256 struct drm_device *dev = dev_priv->dev;
257 struct drm_mode_config *mode_config = &dev->mode_config;
258 struct drm_connector *connector;
259
260 if (mode_config->num_connector) {
261 list_for_each_entry(connector, &mode_config->connector_list, head) {
262 struct intel_output *intel_output = to_intel_output(connector);
263
264 if (intel_output->hot_plug)
265 (*intel_output->hot_plug) (intel_output);
266 }
267 }
268 /* Just fire off a uevent and let userspace tell us what to do */
269 drm_sysfs_hotplug_event(dev);
270 }
271
272 static void i915_handle_rps_change(struct drm_device *dev)
273 {
274 drm_i915_private_t *dev_priv = dev->dev_private;
275 u32 busy_up, busy_down, max_avg, min_avg;
276 u16 rgvswctl;
277 u8 new_delay = dev_priv->cur_delay;
278
279 I915_WRITE(MEMINTRSTS, I915_READ(MEMINTRSTS) & ~MEMINT_EVAL_CHG);
280 busy_up = I915_READ(RCPREVBSYTUPAVG);
281 busy_down = I915_READ(RCPREVBSYTDNAVG);
282 max_avg = I915_READ(RCBMAXAVG);
283 min_avg = I915_READ(RCBMINAVG);
284
285 /* Handle RCS change request from hw */
286 if (busy_up > max_avg) {
287 if (dev_priv->cur_delay != dev_priv->max_delay)
288 new_delay = dev_priv->cur_delay - 1;
289 if (new_delay < dev_priv->max_delay)
290 new_delay = dev_priv->max_delay;
291 } else if (busy_down < min_avg) {
292 if (dev_priv->cur_delay != dev_priv->min_delay)
293 new_delay = dev_priv->cur_delay + 1;
294 if (new_delay > dev_priv->min_delay)
295 new_delay = dev_priv->min_delay;
296 }
297
298 DRM_DEBUG("rps change requested: %d -> %d\n",
299 dev_priv->cur_delay, new_delay);
300
301 rgvswctl = I915_READ(MEMSWCTL);
302 if (rgvswctl & MEMCTL_CMD_STS) {
303 DRM_ERROR("gpu busy, RCS change rejected\n");
304 return; /* still busy with another command */
305 }
306
307 /* Program the new state */
308 rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
309 (new_delay << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
310 I915_WRITE(MEMSWCTL, rgvswctl);
311 POSTING_READ(MEMSWCTL);
312
313 rgvswctl |= MEMCTL_CMD_STS;
314 I915_WRITE(MEMSWCTL, rgvswctl);
315
316 dev_priv->cur_delay = new_delay;
317
318 DRM_DEBUG("rps changed\n");
319
320 return;
321 }
322
323 irqreturn_t ironlake_irq_handler(struct drm_device *dev)
324 {
325 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
326 int ret = IRQ_NONE;
327 u32 de_iir, gt_iir, de_ier, pch_iir;
328 struct drm_i915_master_private *master_priv;
329
330 /* disable master interrupt before clearing iir */
331 de_ier = I915_READ(DEIER);
332 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
333 (void)I915_READ(DEIER);
334
335 de_iir = I915_READ(DEIIR);
336 gt_iir = I915_READ(GTIIR);
337 pch_iir = I915_READ(SDEIIR);
338
339 if (de_iir == 0 && gt_iir == 0 && pch_iir == 0)
340 goto done;
341
342 ret = IRQ_HANDLED;
343
344 if (dev->primary->master) {
345 master_priv = dev->primary->master->driver_priv;
346 if (master_priv->sarea_priv)
347 master_priv->sarea_priv->last_dispatch =
348 READ_BREADCRUMB(dev_priv);
349 }
350
351 if (gt_iir & GT_USER_INTERRUPT) {
352 u32 seqno = i915_get_gem_seqno(dev);
353 dev_priv->mm.irq_gem_seqno = seqno;
354 trace_i915_gem_request_complete(dev, seqno);
355 DRM_WAKEUP(&dev_priv->irq_queue);
356 dev_priv->hangcheck_count = 0;
357 mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD);
358 }
359
360 if (de_iir & DE_GSE)
361 ironlake_opregion_gse_intr(dev);
362
363 if (de_iir & DE_PLANEA_FLIP_DONE) {
364 intel_prepare_page_flip(dev, 0);
365 intel_finish_page_flip(dev, 0);
366 }
367
368 if (de_iir & DE_PLANEB_FLIP_DONE) {
369 intel_prepare_page_flip(dev, 1);
370 intel_finish_page_flip(dev, 1);
371 }
372
373 if (de_iir & DE_PIPEA_VBLANK)
374 drm_handle_vblank(dev, 0);
375
376 if (de_iir & DE_PIPEB_VBLANK)
377 drm_handle_vblank(dev, 1);
378
379 /* check event from PCH */
380 if ((de_iir & DE_PCH_EVENT) &&
381 (pch_iir & SDE_HOTPLUG_MASK)) {
382 queue_work(dev_priv->wq, &dev_priv->hotplug_work);
383 }
384
385 if (de_iir & DE_PCU_EVENT) {
386 I915_WRITE(MEMINTRSTS, I915_READ(MEMINTRSTS));
387 i915_handle_rps_change(dev);
388 }
389
390 /* should clear PCH hotplug event before clear CPU irq */
391 I915_WRITE(SDEIIR, pch_iir);
392 I915_WRITE(GTIIR, gt_iir);
393 I915_WRITE(DEIIR, de_iir);
394
395 done:
396 I915_WRITE(DEIER, de_ier);
397 (void)I915_READ(DEIER);
398
399 return ret;
400 }
401
402 /**
403 * i915_error_work_func - do process context error handling work
404 * @work: work struct
405 *
406 * Fire an error uevent so userspace can see that a hang or error
407 * was detected.
408 */
409 static void i915_error_work_func(struct work_struct *work)
410 {
411 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
412 error_work);
413 struct drm_device *dev = dev_priv->dev;
414 char *error_event[] = { "ERROR=1", NULL };
415 char *reset_event[] = { "RESET=1", NULL };
416 char *reset_done_event[] = { "ERROR=0", NULL };
417
418 DRM_DEBUG_DRIVER("generating error event\n");
419 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
420
421 if (atomic_read(&dev_priv->mm.wedged)) {
422 if (IS_I965G(dev)) {
423 DRM_DEBUG_DRIVER("resetting chip\n");
424 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event);
425 if (!i965_reset(dev, GDRST_RENDER)) {
426 atomic_set(&dev_priv->mm.wedged, 0);
427 kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event);
428 }
429 } else {
430 DRM_DEBUG_DRIVER("reboot required\n");
431 }
432 }
433 }
434
435 static struct drm_i915_error_object *
436 i915_error_object_create(struct drm_device *dev,
437 struct drm_gem_object *src)
438 {
439 struct drm_i915_error_object *dst;
440 struct drm_i915_gem_object *src_priv;
441 int page, page_count;
442
443 if (src == NULL)
444 return NULL;
445
446 src_priv = src->driver_private;
447 if (src_priv->pages == NULL)
448 return NULL;
449
450 page_count = src->size / PAGE_SIZE;
451
452 dst = kmalloc(sizeof(*dst) + page_count * sizeof (u32 *), GFP_ATOMIC);
453 if (dst == NULL)
454 return NULL;
455
456 for (page = 0; page < page_count; page++) {
457 void *s, *d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
458 if (d == NULL)
459 goto unwind;
460 s = kmap_atomic(src_priv->pages[page], KM_USER0);
461 memcpy(d, s, PAGE_SIZE);
462 kunmap_atomic(s, KM_USER0);
463 dst->pages[page] = d;
464 }
465 dst->page_count = page_count;
466 dst->gtt_offset = src_priv->gtt_offset;
467
468 return dst;
469
470 unwind:
471 while (page--)
472 kfree(dst->pages[page]);
473 kfree(dst);
474 return NULL;
475 }
476
477 static void
478 i915_error_object_free(struct drm_i915_error_object *obj)
479 {
480 int page;
481
482 if (obj == NULL)
483 return;
484
485 for (page = 0; page < obj->page_count; page++)
486 kfree(obj->pages[page]);
487
488 kfree(obj);
489 }
490
491 static void
492 i915_error_state_free(struct drm_device *dev,
493 struct drm_i915_error_state *error)
494 {
495 i915_error_object_free(error->batchbuffer[0]);
496 i915_error_object_free(error->batchbuffer[1]);
497 i915_error_object_free(error->ringbuffer);
498 kfree(error->active_bo);
499 kfree(error);
500 }
501
502 static u32
503 i915_get_bbaddr(struct drm_device *dev, u32 *ring)
504 {
505 u32 cmd;
506
507 if (IS_I830(dev) || IS_845G(dev))
508 cmd = MI_BATCH_BUFFER;
509 else if (IS_I965G(dev))
510 cmd = (MI_BATCH_BUFFER_START | (2 << 6) |
511 MI_BATCH_NON_SECURE_I965);
512 else
513 cmd = (MI_BATCH_BUFFER_START | (2 << 6));
514
515 return ring[0] == cmd ? ring[1] : 0;
516 }
517
518 static u32
519 i915_ringbuffer_last_batch(struct drm_device *dev)
520 {
521 struct drm_i915_private *dev_priv = dev->dev_private;
522 u32 head, bbaddr;
523 u32 *ring;
524
525 /* Locate the current position in the ringbuffer and walk back
526 * to find the most recently dispatched batch buffer.
527 */
528 bbaddr = 0;
529 head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
530 ring = (u32 *)(dev_priv->ring.virtual_start + head);
531
532 while (--ring >= (u32 *)dev_priv->ring.virtual_start) {
533 bbaddr = i915_get_bbaddr(dev, ring);
534 if (bbaddr)
535 break;
536 }
537
538 if (bbaddr == 0) {
539 ring = (u32 *)(dev_priv->ring.virtual_start + dev_priv->ring.Size);
540 while (--ring >= (u32 *)dev_priv->ring.virtual_start) {
541 bbaddr = i915_get_bbaddr(dev, ring);
542 if (bbaddr)
543 break;
544 }
545 }
546
547 return bbaddr;
548 }
549
550 /**
551 * i915_capture_error_state - capture an error record for later analysis
552 * @dev: drm device
553 *
554 * Should be called when an error is detected (either a hang or an error
555 * interrupt) to capture error state from the time of the error. Fills
556 * out a structure which becomes available in debugfs for user level tools
557 * to pick up.
558 */
559 static void i915_capture_error_state(struct drm_device *dev)
560 {
561 struct drm_i915_private *dev_priv = dev->dev_private;
562 struct drm_i915_gem_object *obj_priv;
563 struct drm_i915_error_state *error;
564 struct drm_gem_object *batchbuffer[2];
565 unsigned long flags;
566 u32 bbaddr;
567 int count;
568
569 spin_lock_irqsave(&dev_priv->error_lock, flags);
570 error = dev_priv->first_error;
571 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
572 if (error)
573 return;
574
575 error = kmalloc(sizeof(*error), GFP_ATOMIC);
576 if (!error) {
577 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
578 return;
579 }
580
581 error->seqno = i915_get_gem_seqno(dev);
582 error->eir = I915_READ(EIR);
583 error->pgtbl_er = I915_READ(PGTBL_ER);
584 error->pipeastat = I915_READ(PIPEASTAT);
585 error->pipebstat = I915_READ(PIPEBSTAT);
586 error->instpm = I915_READ(INSTPM);
587 if (!IS_I965G(dev)) {
588 error->ipeir = I915_READ(IPEIR);
589 error->ipehr = I915_READ(IPEHR);
590 error->instdone = I915_READ(INSTDONE);
591 error->acthd = I915_READ(ACTHD);
592 error->bbaddr = 0;
593 } else {
594 error->ipeir = I915_READ(IPEIR_I965);
595 error->ipehr = I915_READ(IPEHR_I965);
596 error->instdone = I915_READ(INSTDONE_I965);
597 error->instps = I915_READ(INSTPS);
598 error->instdone1 = I915_READ(INSTDONE1);
599 error->acthd = I915_READ(ACTHD_I965);
600 error->bbaddr = I915_READ64(BB_ADDR);
601 }
602
603 bbaddr = i915_ringbuffer_last_batch(dev);
604
605 /* Grab the current batchbuffer, most likely to have crashed. */
606 batchbuffer[0] = NULL;
607 batchbuffer[1] = NULL;
608 count = 0;
609 list_for_each_entry(obj_priv, &dev_priv->mm.active_list, list) {
610 struct drm_gem_object *obj = obj_priv->obj;
611
612 if (batchbuffer[0] == NULL &&
613 bbaddr >= obj_priv->gtt_offset &&
614 bbaddr < obj_priv->gtt_offset + obj->size)
615 batchbuffer[0] = obj;
616
617 if (batchbuffer[1] == NULL &&
618 error->acthd >= obj_priv->gtt_offset &&
619 error->acthd < obj_priv->gtt_offset + obj->size &&
620 batchbuffer[0] != obj)
621 batchbuffer[1] = obj;
622
623 count++;
624 }
625
626 /* We need to copy these to an anonymous buffer as the simplest
627 * method to avoid being overwritten by userpace.
628 */
629 error->batchbuffer[0] = i915_error_object_create(dev, batchbuffer[0]);
630 error->batchbuffer[1] = i915_error_object_create(dev, batchbuffer[1]);
631
632 /* Record the ringbuffer */
633 error->ringbuffer = i915_error_object_create(dev, dev_priv->ring.ring_obj);
634
635 /* Record buffers on the active list. */
636 error->active_bo = NULL;
637 error->active_bo_count = 0;
638
639 if (count)
640 error->active_bo = kmalloc(sizeof(*error->active_bo)*count,
641 GFP_ATOMIC);
642
643 if (error->active_bo) {
644 int i = 0;
645 list_for_each_entry(obj_priv, &dev_priv->mm.active_list, list) {
646 struct drm_gem_object *obj = obj_priv->obj;
647
648 error->active_bo[i].size = obj->size;
649 error->active_bo[i].name = obj->name;
650 error->active_bo[i].seqno = obj_priv->last_rendering_seqno;
651 error->active_bo[i].gtt_offset = obj_priv->gtt_offset;
652 error->active_bo[i].read_domains = obj->read_domains;
653 error->active_bo[i].write_domain = obj->write_domain;
654 error->active_bo[i].fence_reg = obj_priv->fence_reg;
655 error->active_bo[i].pinned = 0;
656 if (obj_priv->pin_count > 0)
657 error->active_bo[i].pinned = 1;
658 if (obj_priv->user_pin_count > 0)
659 error->active_bo[i].pinned = -1;
660 error->active_bo[i].tiling = obj_priv->tiling_mode;
661 error->active_bo[i].dirty = obj_priv->dirty;
662 error->active_bo[i].purgeable = obj_priv->madv != I915_MADV_WILLNEED;
663
664 if (++i == count)
665 break;
666 }
667 error->active_bo_count = i;
668 }
669
670 do_gettimeofday(&error->time);
671
672 spin_lock_irqsave(&dev_priv->error_lock, flags);
673 if (dev_priv->first_error == NULL) {
674 dev_priv->first_error = error;
675 error = NULL;
676 }
677 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
678
679 if (error)
680 i915_error_state_free(dev, error);
681 }
682
683 void i915_destroy_error_state(struct drm_device *dev)
684 {
685 struct drm_i915_private *dev_priv = dev->dev_private;
686 struct drm_i915_error_state *error;
687
688 spin_lock(&dev_priv->error_lock);
689 error = dev_priv->first_error;
690 dev_priv->first_error = NULL;
691 spin_unlock(&dev_priv->error_lock);
692
693 if (error)
694 i915_error_state_free(dev, error);
695 }
696
697 /**
698 * i915_handle_error - handle an error interrupt
699 * @dev: drm device
700 *
701 * Do some basic checking of regsiter state at error interrupt time and
702 * dump it to the syslog. Also call i915_capture_error_state() to make
703 * sure we get a record and make it available in debugfs. Fire a uevent
704 * so userspace knows something bad happened (should trigger collection
705 * of a ring dump etc.).
706 */
707 static void i915_handle_error(struct drm_device *dev, bool wedged)
708 {
709 struct drm_i915_private *dev_priv = dev->dev_private;
710 u32 eir = I915_READ(EIR);
711 u32 pipea_stats = I915_READ(PIPEASTAT);
712 u32 pipeb_stats = I915_READ(PIPEBSTAT);
713
714 i915_capture_error_state(dev);
715
716 printk(KERN_ERR "render error detected, EIR: 0x%08x\n",
717 eir);
718
719 if (IS_G4X(dev)) {
720 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
721 u32 ipeir = I915_READ(IPEIR_I965);
722
723 printk(KERN_ERR " IPEIR: 0x%08x\n",
724 I915_READ(IPEIR_I965));
725 printk(KERN_ERR " IPEHR: 0x%08x\n",
726 I915_READ(IPEHR_I965));
727 printk(KERN_ERR " INSTDONE: 0x%08x\n",
728 I915_READ(INSTDONE_I965));
729 printk(KERN_ERR " INSTPS: 0x%08x\n",
730 I915_READ(INSTPS));
731 printk(KERN_ERR " INSTDONE1: 0x%08x\n",
732 I915_READ(INSTDONE1));
733 printk(KERN_ERR " ACTHD: 0x%08x\n",
734 I915_READ(ACTHD_I965));
735 I915_WRITE(IPEIR_I965, ipeir);
736 (void)I915_READ(IPEIR_I965);
737 }
738 if (eir & GM45_ERROR_PAGE_TABLE) {
739 u32 pgtbl_err = I915_READ(PGTBL_ER);
740 printk(KERN_ERR "page table error\n");
741 printk(KERN_ERR " PGTBL_ER: 0x%08x\n",
742 pgtbl_err);
743 I915_WRITE(PGTBL_ER, pgtbl_err);
744 (void)I915_READ(PGTBL_ER);
745 }
746 }
747
748 if (IS_I9XX(dev)) {
749 if (eir & I915_ERROR_PAGE_TABLE) {
750 u32 pgtbl_err = I915_READ(PGTBL_ER);
751 printk(KERN_ERR "page table error\n");
752 printk(KERN_ERR " PGTBL_ER: 0x%08x\n",
753 pgtbl_err);
754 I915_WRITE(PGTBL_ER, pgtbl_err);
755 (void)I915_READ(PGTBL_ER);
756 }
757 }
758
759 if (eir & I915_ERROR_MEMORY_REFRESH) {
760 printk(KERN_ERR "memory refresh error\n");
761 printk(KERN_ERR "PIPEASTAT: 0x%08x\n",
762 pipea_stats);
763 printk(KERN_ERR "PIPEBSTAT: 0x%08x\n",
764 pipeb_stats);
765 /* pipestat has already been acked */
766 }
767 if (eir & I915_ERROR_INSTRUCTION) {
768 printk(KERN_ERR "instruction error\n");
769 printk(KERN_ERR " INSTPM: 0x%08x\n",
770 I915_READ(INSTPM));
771 if (!IS_I965G(dev)) {
772 u32 ipeir = I915_READ(IPEIR);
773
774 printk(KERN_ERR " IPEIR: 0x%08x\n",
775 I915_READ(IPEIR));
776 printk(KERN_ERR " IPEHR: 0x%08x\n",
777 I915_READ(IPEHR));
778 printk(KERN_ERR " INSTDONE: 0x%08x\n",
779 I915_READ(INSTDONE));
780 printk(KERN_ERR " ACTHD: 0x%08x\n",
781 I915_READ(ACTHD));
782 I915_WRITE(IPEIR, ipeir);
783 (void)I915_READ(IPEIR);
784 } else {
785 u32 ipeir = I915_READ(IPEIR_I965);
786
787 printk(KERN_ERR " IPEIR: 0x%08x\n",
788 I915_READ(IPEIR_I965));
789 printk(KERN_ERR " IPEHR: 0x%08x\n",
790 I915_READ(IPEHR_I965));
791 printk(KERN_ERR " INSTDONE: 0x%08x\n",
792 I915_READ(INSTDONE_I965));
793 printk(KERN_ERR " INSTPS: 0x%08x\n",
794 I915_READ(INSTPS));
795 printk(KERN_ERR " INSTDONE1: 0x%08x\n",
796 I915_READ(INSTDONE1));
797 printk(KERN_ERR " ACTHD: 0x%08x\n",
798 I915_READ(ACTHD_I965));
799 I915_WRITE(IPEIR_I965, ipeir);
800 (void)I915_READ(IPEIR_I965);
801 }
802 }
803
804 I915_WRITE(EIR, eir);
805 (void)I915_READ(EIR);
806 eir = I915_READ(EIR);
807 if (eir) {
808 /*
809 * some errors might have become stuck,
810 * mask them.
811 */
812 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
813 I915_WRITE(EMR, I915_READ(EMR) | eir);
814 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
815 }
816
817 if (wedged) {
818 atomic_set(&dev_priv->mm.wedged, 1);
819
820 /*
821 * Wakeup waiting processes so they don't hang
822 */
823 DRM_WAKEUP(&dev_priv->irq_queue);
824 }
825
826 queue_work(dev_priv->wq, &dev_priv->error_work);
827 }
828
829 irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
830 {
831 struct drm_device *dev = (struct drm_device *) arg;
832 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
833 struct drm_i915_master_private *master_priv;
834 u32 iir, new_iir;
835 u32 pipea_stats, pipeb_stats;
836 u32 vblank_status;
837 u32 vblank_enable;
838 int vblank = 0;
839 unsigned long irqflags;
840 int irq_received;
841 int ret = IRQ_NONE;
842
843 atomic_inc(&dev_priv->irq_received);
844
845 if (HAS_PCH_SPLIT(dev))
846 return ironlake_irq_handler(dev);
847
848 iir = I915_READ(IIR);
849
850 if (IS_I965G(dev)) {
851 vblank_status = I915_START_VBLANK_INTERRUPT_STATUS;
852 vblank_enable = PIPE_START_VBLANK_INTERRUPT_ENABLE;
853 } else {
854 vblank_status = I915_VBLANK_INTERRUPT_STATUS;
855 vblank_enable = I915_VBLANK_INTERRUPT_ENABLE;
856 }
857
858 for (;;) {
859 irq_received = iir != 0;
860
861 /* Can't rely on pipestat interrupt bit in iir as it might
862 * have been cleared after the pipestat interrupt was received.
863 * It doesn't set the bit in iir again, but it still produces
864 * interrupts (for non-MSI).
865 */
866 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
867 pipea_stats = I915_READ(PIPEASTAT);
868 pipeb_stats = I915_READ(PIPEBSTAT);
869
870 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
871 i915_handle_error(dev, false);
872
873 /*
874 * Clear the PIPE(A|B)STAT regs before the IIR
875 */
876 if (pipea_stats & 0x8000ffff) {
877 if (pipea_stats & PIPE_FIFO_UNDERRUN_STATUS)
878 DRM_DEBUG_DRIVER("pipe a underrun\n");
879 I915_WRITE(PIPEASTAT, pipea_stats);
880 irq_received = 1;
881 }
882
883 if (pipeb_stats & 0x8000ffff) {
884 if (pipeb_stats & PIPE_FIFO_UNDERRUN_STATUS)
885 DRM_DEBUG_DRIVER("pipe b underrun\n");
886 I915_WRITE(PIPEBSTAT, pipeb_stats);
887 irq_received = 1;
888 }
889 spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
890
891 if (!irq_received)
892 break;
893
894 ret = IRQ_HANDLED;
895
896 /* Consume port. Then clear IIR or we'll miss events */
897 if ((I915_HAS_HOTPLUG(dev)) &&
898 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
899 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
900
901 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
902 hotplug_status);
903 if (hotplug_status & dev_priv->hotplug_supported_mask)
904 queue_work(dev_priv->wq,
905 &dev_priv->hotplug_work);
906
907 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
908 I915_READ(PORT_HOTPLUG_STAT);
909 }
910
911 I915_WRITE(IIR, iir);
912 new_iir = I915_READ(IIR); /* Flush posted writes */
913
914 if (dev->primary->master) {
915 master_priv = dev->primary->master->driver_priv;
916 if (master_priv->sarea_priv)
917 master_priv->sarea_priv->last_dispatch =
918 READ_BREADCRUMB(dev_priv);
919 }
920
921 if (iir & I915_USER_INTERRUPT) {
922 u32 seqno = i915_get_gem_seqno(dev);
923 dev_priv->mm.irq_gem_seqno = seqno;
924 trace_i915_gem_request_complete(dev, seqno);
925 DRM_WAKEUP(&dev_priv->irq_queue);
926 dev_priv->hangcheck_count = 0;
927 mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD);
928 }
929
930 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT)
931 intel_prepare_page_flip(dev, 0);
932
933 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT)
934 intel_prepare_page_flip(dev, 1);
935
936 if (pipea_stats & vblank_status) {
937 vblank++;
938 drm_handle_vblank(dev, 0);
939 intel_finish_page_flip(dev, 0);
940 }
941
942 if (pipeb_stats & vblank_status) {
943 vblank++;
944 drm_handle_vblank(dev, 1);
945 intel_finish_page_flip(dev, 1);
946 }
947
948 if ((pipeb_stats & I915_LEGACY_BLC_EVENT_STATUS) ||
949 (iir & I915_ASLE_INTERRUPT))
950 opregion_asle_intr(dev);
951
952 /* With MSI, interrupts are only generated when iir
953 * transitions from zero to nonzero. If another bit got
954 * set while we were handling the existing iir bits, then
955 * we would never get another interrupt.
956 *
957 * This is fine on non-MSI as well, as if we hit this path
958 * we avoid exiting the interrupt handler only to generate
959 * another one.
960 *
961 * Note that for MSI this could cause a stray interrupt report
962 * if an interrupt landed in the time between writing IIR and
963 * the posting read. This should be rare enough to never
964 * trigger the 99% of 100,000 interrupts test for disabling
965 * stray interrupts.
966 */
967 iir = new_iir;
968 }
969
970 return ret;
971 }
972
973 static int i915_emit_irq(struct drm_device * dev)
974 {
975 drm_i915_private_t *dev_priv = dev->dev_private;
976 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
977 RING_LOCALS;
978
979 i915_kernel_lost_context(dev);
980
981 DRM_DEBUG_DRIVER("\n");
982
983 dev_priv->counter++;
984 if (dev_priv->counter > 0x7FFFFFFFUL)
985 dev_priv->counter = 1;
986 if (master_priv->sarea_priv)
987 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
988
989 BEGIN_LP_RING(4);
990 OUT_RING(MI_STORE_DWORD_INDEX);
991 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
992 OUT_RING(dev_priv->counter);
993 OUT_RING(MI_USER_INTERRUPT);
994 ADVANCE_LP_RING();
995
996 return dev_priv->counter;
997 }
998
999 void i915_user_irq_get(struct drm_device *dev)
1000 {
1001 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1002 unsigned long irqflags;
1003
1004 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
1005 if (dev->irq_enabled && (++dev_priv->user_irq_refcount == 1)) {
1006 if (HAS_PCH_SPLIT(dev))
1007 ironlake_enable_graphics_irq(dev_priv, GT_USER_INTERRUPT);
1008 else
1009 i915_enable_irq(dev_priv, I915_USER_INTERRUPT);
1010 }
1011 spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
1012 }
1013
1014 void i915_user_irq_put(struct drm_device *dev)
1015 {
1016 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1017 unsigned long irqflags;
1018
1019 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
1020 BUG_ON(dev->irq_enabled && dev_priv->user_irq_refcount <= 0);
1021 if (dev->irq_enabled && (--dev_priv->user_irq_refcount == 0)) {
1022 if (HAS_PCH_SPLIT(dev))
1023 ironlake_disable_graphics_irq(dev_priv, GT_USER_INTERRUPT);
1024 else
1025 i915_disable_irq(dev_priv, I915_USER_INTERRUPT);
1026 }
1027 spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
1028 }
1029
1030 void i915_trace_irq_get(struct drm_device *dev, u32 seqno)
1031 {
1032 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1033
1034 if (dev_priv->trace_irq_seqno == 0)
1035 i915_user_irq_get(dev);
1036
1037 dev_priv->trace_irq_seqno = seqno;
1038 }
1039
1040 static int i915_wait_irq(struct drm_device * dev, int irq_nr)
1041 {
1042 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1043 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
1044 int ret = 0;
1045
1046 DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr,
1047 READ_BREADCRUMB(dev_priv));
1048
1049 if (READ_BREADCRUMB(dev_priv) >= irq_nr) {
1050 if (master_priv->sarea_priv)
1051 master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
1052 return 0;
1053 }
1054
1055 if (master_priv->sarea_priv)
1056 master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
1057
1058 i915_user_irq_get(dev);
1059 DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ,
1060 READ_BREADCRUMB(dev_priv) >= irq_nr);
1061 i915_user_irq_put(dev);
1062
1063 if (ret == -EBUSY) {
1064 DRM_ERROR("EBUSY -- rec: %d emitted: %d\n",
1065 READ_BREADCRUMB(dev_priv), (int)dev_priv->counter);
1066 }
1067
1068 return ret;
1069 }
1070
1071 /* Needs the lock as it touches the ring.
1072 */
1073 int i915_irq_emit(struct drm_device *dev, void *data,
1074 struct drm_file *file_priv)
1075 {
1076 drm_i915_private_t *dev_priv = dev->dev_private;
1077 drm_i915_irq_emit_t *emit = data;
1078 int result;
1079
1080 if (!dev_priv || !dev_priv->ring.virtual_start) {
1081 DRM_ERROR("called with no initialization\n");
1082 return -EINVAL;
1083 }
1084
1085 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
1086
1087 mutex_lock(&dev->struct_mutex);
1088 result = i915_emit_irq(dev);
1089 mutex_unlock(&dev->struct_mutex);
1090
1091 if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) {
1092 DRM_ERROR("copy_to_user\n");
1093 return -EFAULT;
1094 }
1095
1096 return 0;
1097 }
1098
1099 /* Doesn't need the hardware lock.
1100 */
1101 int i915_irq_wait(struct drm_device *dev, void *data,
1102 struct drm_file *file_priv)
1103 {
1104 drm_i915_private_t *dev_priv = dev->dev_private;
1105 drm_i915_irq_wait_t *irqwait = data;
1106
1107 if (!dev_priv) {
1108 DRM_ERROR("called with no initialization\n");
1109 return -EINVAL;
1110 }
1111
1112 return i915_wait_irq(dev, irqwait->irq_seq);
1113 }
1114
1115 /* Called from drm generic code, passed 'crtc' which
1116 * we use as a pipe index
1117 */
1118 int i915_enable_vblank(struct drm_device *dev, int pipe)
1119 {
1120 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1121 unsigned long irqflags;
1122 int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
1123 u32 pipeconf;
1124
1125 pipeconf = I915_READ(pipeconf_reg);
1126 if (!(pipeconf & PIPEACONF_ENABLE))
1127 return -EINVAL;
1128
1129 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
1130 if (HAS_PCH_SPLIT(dev))
1131 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
1132 DE_PIPEA_VBLANK: DE_PIPEB_VBLANK);
1133 else if (IS_I965G(dev))
1134 i915_enable_pipestat(dev_priv, pipe,
1135 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1136 else
1137 i915_enable_pipestat(dev_priv, pipe,
1138 PIPE_VBLANK_INTERRUPT_ENABLE);
1139 spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
1140 return 0;
1141 }
1142
1143 /* Called from drm generic code, passed 'crtc' which
1144 * we use as a pipe index
1145 */
1146 void i915_disable_vblank(struct drm_device *dev, int pipe)
1147 {
1148 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1149 unsigned long irqflags;
1150
1151 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
1152 if (HAS_PCH_SPLIT(dev))
1153 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
1154 DE_PIPEA_VBLANK: DE_PIPEB_VBLANK);
1155 else
1156 i915_disable_pipestat(dev_priv, pipe,
1157 PIPE_VBLANK_INTERRUPT_ENABLE |
1158 PIPE_START_VBLANK_INTERRUPT_ENABLE);
1159 spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
1160 }
1161
1162 void i915_enable_interrupt (struct drm_device *dev)
1163 {
1164 struct drm_i915_private *dev_priv = dev->dev_private;
1165
1166 if (!HAS_PCH_SPLIT(dev))
1167 opregion_enable_asle(dev);
1168 dev_priv->irq_enabled = 1;
1169 }
1170
1171
1172 /* Set the vblank monitor pipe
1173 */
1174 int i915_vblank_pipe_set(struct drm_device *dev, void *data,
1175 struct drm_file *file_priv)
1176 {
1177 drm_i915_private_t *dev_priv = dev->dev_private;
1178
1179 if (!dev_priv) {
1180 DRM_ERROR("called with no initialization\n");
1181 return -EINVAL;
1182 }
1183
1184 return 0;
1185 }
1186
1187 int i915_vblank_pipe_get(struct drm_device *dev, void *data,
1188 struct drm_file *file_priv)
1189 {
1190 drm_i915_private_t *dev_priv = dev->dev_private;
1191 drm_i915_vblank_pipe_t *pipe = data;
1192
1193 if (!dev_priv) {
1194 DRM_ERROR("called with no initialization\n");
1195 return -EINVAL;
1196 }
1197
1198 pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
1199
1200 return 0;
1201 }
1202
1203 /**
1204 * Schedule buffer swap at given vertical blank.
1205 */
1206 int i915_vblank_swap(struct drm_device *dev, void *data,
1207 struct drm_file *file_priv)
1208 {
1209 /* The delayed swap mechanism was fundamentally racy, and has been
1210 * removed. The model was that the client requested a delayed flip/swap
1211 * from the kernel, then waited for vblank before continuing to perform
1212 * rendering. The problem was that the kernel might wake the client
1213 * up before it dispatched the vblank swap (since the lock has to be
1214 * held while touching the ringbuffer), in which case the client would
1215 * clear and start the next frame before the swap occurred, and
1216 * flicker would occur in addition to likely missing the vblank.
1217 *
1218 * In the absence of this ioctl, userland falls back to a correct path
1219 * of waiting for a vblank, then dispatching the swap on its own.
1220 * Context switching to userland and back is plenty fast enough for
1221 * meeting the requirements of vblank swapping.
1222 */
1223 return -EINVAL;
1224 }
1225
1226 struct drm_i915_gem_request *i915_get_tail_request(struct drm_device *dev) {
1227 drm_i915_private_t *dev_priv = dev->dev_private;
1228 return list_entry(dev_priv->mm.request_list.prev, struct drm_i915_gem_request, list);
1229 }
1230
1231 /**
1232 * This is called when the chip hasn't reported back with completed
1233 * batchbuffers in a long time. The first time this is called we simply record
1234 * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses
1235 * again, we assume the chip is wedged and try to fix it.
1236 */
1237 void i915_hangcheck_elapsed(unsigned long data)
1238 {
1239 struct drm_device *dev = (struct drm_device *)data;
1240 drm_i915_private_t *dev_priv = dev->dev_private;
1241 uint32_t acthd;
1242
1243 if (!IS_I965G(dev))
1244 acthd = I915_READ(ACTHD);
1245 else
1246 acthd = I915_READ(ACTHD_I965);
1247
1248 /* If all work is done then ACTHD clearly hasn't advanced. */
1249 if (list_empty(&dev_priv->mm.request_list) ||
1250 i915_seqno_passed(i915_get_gem_seqno(dev), i915_get_tail_request(dev)->seqno)) {
1251 dev_priv->hangcheck_count = 0;
1252 return;
1253 }
1254
1255 if (dev_priv->last_acthd == acthd && dev_priv->hangcheck_count > 0) {
1256 DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
1257 i915_handle_error(dev, true);
1258 return;
1259 }
1260
1261 /* Reset timer case chip hangs without another request being added */
1262 mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD);
1263
1264 if (acthd != dev_priv->last_acthd)
1265 dev_priv->hangcheck_count = 0;
1266 else
1267 dev_priv->hangcheck_count++;
1268
1269 dev_priv->last_acthd = acthd;
1270 }
1271
1272 /* drm_dma.h hooks
1273 */
1274 static void ironlake_irq_preinstall(struct drm_device *dev)
1275 {
1276 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1277
1278 I915_WRITE(HWSTAM, 0xeffe);
1279
1280 /* XXX hotplug from PCH */
1281
1282 I915_WRITE(DEIMR, 0xffffffff);
1283 I915_WRITE(DEIER, 0x0);
1284 (void) I915_READ(DEIER);
1285
1286 /* and GT */
1287 I915_WRITE(GTIMR, 0xffffffff);
1288 I915_WRITE(GTIER, 0x0);
1289 (void) I915_READ(GTIER);
1290
1291 /* south display irq */
1292 I915_WRITE(SDEIMR, 0xffffffff);
1293 I915_WRITE(SDEIER, 0x0);
1294 (void) I915_READ(SDEIER);
1295 }
1296
1297 static int ironlake_irq_postinstall(struct drm_device *dev)
1298 {
1299 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1300 /* enable kind of interrupts always enabled */
1301 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
1302 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE;
1303 u32 render_mask = GT_USER_INTERRUPT;
1304 u32 hotplug_mask = SDE_CRT_HOTPLUG | SDE_PORTB_HOTPLUG |
1305 SDE_PORTC_HOTPLUG | SDE_PORTD_HOTPLUG;
1306
1307 dev_priv->irq_mask_reg = ~display_mask;
1308 dev_priv->de_irq_enable_reg = display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK;
1309
1310 /* should always can generate irq */
1311 I915_WRITE(DEIIR, I915_READ(DEIIR));
1312 I915_WRITE(DEIMR, dev_priv->irq_mask_reg);
1313 I915_WRITE(DEIER, dev_priv->de_irq_enable_reg);
1314 (void) I915_READ(DEIER);
1315
1316 /* user interrupt should be enabled, but masked initial */
1317 dev_priv->gt_irq_mask_reg = 0xffffffff;
1318 dev_priv->gt_irq_enable_reg = render_mask;
1319
1320 I915_WRITE(GTIIR, I915_READ(GTIIR));
1321 I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg);
1322 I915_WRITE(GTIER, dev_priv->gt_irq_enable_reg);
1323 (void) I915_READ(GTIER);
1324
1325 dev_priv->pch_irq_mask_reg = ~hotplug_mask;
1326 dev_priv->pch_irq_enable_reg = hotplug_mask;
1327
1328 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1329 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask_reg);
1330 I915_WRITE(SDEIER, dev_priv->pch_irq_enable_reg);
1331 (void) I915_READ(SDEIER);
1332
1333 if (IS_IRONLAKE_M(dev)) {
1334 /* Clear & enable PCU event interrupts */
1335 I915_WRITE(DEIIR, DE_PCU_EVENT);
1336 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
1337 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
1338 }
1339
1340 return 0;
1341 }
1342
1343 void i915_driver_irq_preinstall(struct drm_device * dev)
1344 {
1345 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1346
1347 atomic_set(&dev_priv->irq_received, 0);
1348
1349 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
1350 INIT_WORK(&dev_priv->error_work, i915_error_work_func);
1351
1352 if (HAS_PCH_SPLIT(dev)) {
1353 ironlake_irq_preinstall(dev);
1354 return;
1355 }
1356
1357 if (I915_HAS_HOTPLUG(dev)) {
1358 I915_WRITE(PORT_HOTPLUG_EN, 0);
1359 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
1360 }
1361
1362 I915_WRITE(HWSTAM, 0xeffe);
1363 I915_WRITE(PIPEASTAT, 0);
1364 I915_WRITE(PIPEBSTAT, 0);
1365 I915_WRITE(IMR, 0xffffffff);
1366 I915_WRITE(IER, 0x0);
1367 (void) I915_READ(IER);
1368 }
1369
1370 /*
1371 * Must be called after intel_modeset_init or hotplug interrupts won't be
1372 * enabled correctly.
1373 */
1374 int i915_driver_irq_postinstall(struct drm_device *dev)
1375 {
1376 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1377 u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR;
1378 u32 error_mask;
1379
1380 DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);
1381
1382 dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
1383
1384 if (HAS_PCH_SPLIT(dev))
1385 return ironlake_irq_postinstall(dev);
1386
1387 /* Unmask the interrupts that we always want on. */
1388 dev_priv->irq_mask_reg = ~I915_INTERRUPT_ENABLE_FIX;
1389
1390 dev_priv->pipestat[0] = 0;
1391 dev_priv->pipestat[1] = 0;
1392
1393 if (I915_HAS_HOTPLUG(dev)) {
1394 u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
1395
1396 /* Note HDMI and DP share bits */
1397 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
1398 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
1399 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
1400 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
1401 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
1402 hotplug_en |= HDMID_HOTPLUG_INT_EN;
1403 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
1404 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
1405 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
1406 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
1407 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS)
1408 hotplug_en |= CRT_HOTPLUG_INT_EN;
1409 /* Ignore TV since it's buggy */
1410
1411 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
1412
1413 /* Enable in IER... */
1414 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
1415 /* and unmask in IMR */
1416 i915_enable_irq(dev_priv, I915_DISPLAY_PORT_INTERRUPT);
1417 }
1418
1419 /*
1420 * Enable some error detection, note the instruction error mask
1421 * bit is reserved, so we leave it masked.
1422 */
1423 if (IS_G4X(dev)) {
1424 error_mask = ~(GM45_ERROR_PAGE_TABLE |
1425 GM45_ERROR_MEM_PRIV |
1426 GM45_ERROR_CP_PRIV |
1427 I915_ERROR_MEMORY_REFRESH);
1428 } else {
1429 error_mask = ~(I915_ERROR_PAGE_TABLE |
1430 I915_ERROR_MEMORY_REFRESH);
1431 }
1432 I915_WRITE(EMR, error_mask);
1433
1434 /* Disable pipe interrupt enables, clear pending pipe status */
1435 I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff);
1436 I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff);
1437 /* Clear pending interrupt status */
1438 I915_WRITE(IIR, I915_READ(IIR));
1439
1440 I915_WRITE(IER, enable_mask);
1441 I915_WRITE(IMR, dev_priv->irq_mask_reg);
1442 (void) I915_READ(IER);
1443
1444 opregion_enable_asle(dev);
1445
1446 return 0;
1447 }
1448
1449 static void ironlake_irq_uninstall(struct drm_device *dev)
1450 {
1451 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1452 I915_WRITE(HWSTAM, 0xffffffff);
1453
1454 I915_WRITE(DEIMR, 0xffffffff);
1455 I915_WRITE(DEIER, 0x0);
1456 I915_WRITE(DEIIR, I915_READ(DEIIR));
1457
1458 I915_WRITE(GTIMR, 0xffffffff);
1459 I915_WRITE(GTIER, 0x0);
1460 I915_WRITE(GTIIR, I915_READ(GTIIR));
1461 }
1462
1463 void i915_driver_irq_uninstall(struct drm_device * dev)
1464 {
1465 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1466
1467 if (!dev_priv)
1468 return;
1469
1470 dev_priv->vblank_pipe = 0;
1471
1472 if (HAS_PCH_SPLIT(dev)) {
1473 ironlake_irq_uninstall(dev);
1474 return;
1475 }
1476
1477 if (I915_HAS_HOTPLUG(dev)) {
1478 I915_WRITE(PORT_HOTPLUG_EN, 0);
1479 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
1480 }
1481
1482 I915_WRITE(HWSTAM, 0xffffffff);
1483 I915_WRITE(PIPEASTAT, 0);
1484 I915_WRITE(PIPEBSTAT, 0);
1485 I915_WRITE(IMR, 0xffffffff);
1486 I915_WRITE(IER, 0x0);
1487
1488 I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff);
1489 I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff);
1490 I915_WRITE(IIR, I915_READ(IIR));
1491 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree