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drm/i915: add dynamic performance control support for Ironlake
[mirror_ubuntu-hirsute-kernel.git] / drivers / gpu / drm / i915 / i915_irq.c
1 /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
2 */
3 /*
4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 */
28
29 #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 slow_up, slow_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 slow_up = I915_READ(RCPREVBSYTUPAVG);
281 slow_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 (slow_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 (slow_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 slow, RCS change rejected\n");
304 return; /* still slow 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 /**
436 * i915_capture_error_state - capture an error record for later analysis
437 * @dev: drm device
438 *
439 * Should be called when an error is detected (either a hang or an error
440 * interrupt) to capture error state from the time of the error. Fills
441 * out a structure which becomes available in debugfs for user level tools
442 * to pick up.
443 */
444 static void i915_capture_error_state(struct drm_device *dev)
445 {
446 struct drm_i915_private *dev_priv = dev->dev_private;
447 struct drm_i915_error_state *error;
448 unsigned long flags;
449
450 spin_lock_irqsave(&dev_priv->error_lock, flags);
451 if (dev_priv->first_error)
452 goto out;
453
454 error = kmalloc(sizeof(*error), GFP_ATOMIC);
455 if (!error) {
456 DRM_DEBUG_DRIVER("out ot memory, not capturing error state\n");
457 goto out;
458 }
459
460 error->eir = I915_READ(EIR);
461 error->pgtbl_er = I915_READ(PGTBL_ER);
462 error->pipeastat = I915_READ(PIPEASTAT);
463 error->pipebstat = I915_READ(PIPEBSTAT);
464 error->instpm = I915_READ(INSTPM);
465 if (!IS_I965G(dev)) {
466 error->ipeir = I915_READ(IPEIR);
467 error->ipehr = I915_READ(IPEHR);
468 error->instdone = I915_READ(INSTDONE);
469 error->acthd = I915_READ(ACTHD);
470 } else {
471 error->ipeir = I915_READ(IPEIR_I965);
472 error->ipehr = I915_READ(IPEHR_I965);
473 error->instdone = I915_READ(INSTDONE_I965);
474 error->instps = I915_READ(INSTPS);
475 error->instdone1 = I915_READ(INSTDONE1);
476 error->acthd = I915_READ(ACTHD_I965);
477 }
478
479 do_gettimeofday(&error->time);
480
481 dev_priv->first_error = error;
482
483 out:
484 spin_unlock_irqrestore(&dev_priv->error_lock, flags);
485 }
486
487 /**
488 * i915_handle_error - handle an error interrupt
489 * @dev: drm device
490 *
491 * Do some basic checking of regsiter state at error interrupt time and
492 * dump it to the syslog. Also call i915_capture_error_state() to make
493 * sure we get a record and make it available in debugfs. Fire a uevent
494 * so userspace knows something bad happened (should trigger collection
495 * of a ring dump etc.).
496 */
497 static void i915_handle_error(struct drm_device *dev, bool wedged)
498 {
499 struct drm_i915_private *dev_priv = dev->dev_private;
500 u32 eir = I915_READ(EIR);
501 u32 pipea_stats = I915_READ(PIPEASTAT);
502 u32 pipeb_stats = I915_READ(PIPEBSTAT);
503
504 i915_capture_error_state(dev);
505
506 printk(KERN_ERR "render error detected, EIR: 0x%08x\n",
507 eir);
508
509 if (IS_G4X(dev)) {
510 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
511 u32 ipeir = I915_READ(IPEIR_I965);
512
513 printk(KERN_ERR " IPEIR: 0x%08x\n",
514 I915_READ(IPEIR_I965));
515 printk(KERN_ERR " IPEHR: 0x%08x\n",
516 I915_READ(IPEHR_I965));
517 printk(KERN_ERR " INSTDONE: 0x%08x\n",
518 I915_READ(INSTDONE_I965));
519 printk(KERN_ERR " INSTPS: 0x%08x\n",
520 I915_READ(INSTPS));
521 printk(KERN_ERR " INSTDONE1: 0x%08x\n",
522 I915_READ(INSTDONE1));
523 printk(KERN_ERR " ACTHD: 0x%08x\n",
524 I915_READ(ACTHD_I965));
525 I915_WRITE(IPEIR_I965, ipeir);
526 (void)I915_READ(IPEIR_I965);
527 }
528 if (eir & GM45_ERROR_PAGE_TABLE) {
529 u32 pgtbl_err = I915_READ(PGTBL_ER);
530 printk(KERN_ERR "page table error\n");
531 printk(KERN_ERR " PGTBL_ER: 0x%08x\n",
532 pgtbl_err);
533 I915_WRITE(PGTBL_ER, pgtbl_err);
534 (void)I915_READ(PGTBL_ER);
535 }
536 }
537
538 if (IS_I9XX(dev)) {
539 if (eir & I915_ERROR_PAGE_TABLE) {
540 u32 pgtbl_err = I915_READ(PGTBL_ER);
541 printk(KERN_ERR "page table error\n");
542 printk(KERN_ERR " PGTBL_ER: 0x%08x\n",
543 pgtbl_err);
544 I915_WRITE(PGTBL_ER, pgtbl_err);
545 (void)I915_READ(PGTBL_ER);
546 }
547 }
548
549 if (eir & I915_ERROR_MEMORY_REFRESH) {
550 printk(KERN_ERR "memory refresh error\n");
551 printk(KERN_ERR "PIPEASTAT: 0x%08x\n",
552 pipea_stats);
553 printk(KERN_ERR "PIPEBSTAT: 0x%08x\n",
554 pipeb_stats);
555 /* pipestat has already been acked */
556 }
557 if (eir & I915_ERROR_INSTRUCTION) {
558 printk(KERN_ERR "instruction error\n");
559 printk(KERN_ERR " INSTPM: 0x%08x\n",
560 I915_READ(INSTPM));
561 if (!IS_I965G(dev)) {
562 u32 ipeir = I915_READ(IPEIR);
563
564 printk(KERN_ERR " IPEIR: 0x%08x\n",
565 I915_READ(IPEIR));
566 printk(KERN_ERR " IPEHR: 0x%08x\n",
567 I915_READ(IPEHR));
568 printk(KERN_ERR " INSTDONE: 0x%08x\n",
569 I915_READ(INSTDONE));
570 printk(KERN_ERR " ACTHD: 0x%08x\n",
571 I915_READ(ACTHD));
572 I915_WRITE(IPEIR, ipeir);
573 (void)I915_READ(IPEIR);
574 } else {
575 u32 ipeir = I915_READ(IPEIR_I965);
576
577 printk(KERN_ERR " IPEIR: 0x%08x\n",
578 I915_READ(IPEIR_I965));
579 printk(KERN_ERR " IPEHR: 0x%08x\n",
580 I915_READ(IPEHR_I965));
581 printk(KERN_ERR " INSTDONE: 0x%08x\n",
582 I915_READ(INSTDONE_I965));
583 printk(KERN_ERR " INSTPS: 0x%08x\n",
584 I915_READ(INSTPS));
585 printk(KERN_ERR " INSTDONE1: 0x%08x\n",
586 I915_READ(INSTDONE1));
587 printk(KERN_ERR " ACTHD: 0x%08x\n",
588 I915_READ(ACTHD_I965));
589 I915_WRITE(IPEIR_I965, ipeir);
590 (void)I915_READ(IPEIR_I965);
591 }
592 }
593
594 I915_WRITE(EIR, eir);
595 (void)I915_READ(EIR);
596 eir = I915_READ(EIR);
597 if (eir) {
598 /*
599 * some errors might have become stuck,
600 * mask them.
601 */
602 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
603 I915_WRITE(EMR, I915_READ(EMR) | eir);
604 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
605 }
606
607 if (wedged) {
608 atomic_set(&dev_priv->mm.wedged, 1);
609
610 /*
611 * Wakeup waiting processes so they don't hang
612 */
613 DRM_WAKEUP(&dev_priv->irq_queue);
614 }
615
616 queue_work(dev_priv->wq, &dev_priv->error_work);
617 }
618
619 irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
620 {
621 struct drm_device *dev = (struct drm_device *) arg;
622 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
623 struct drm_i915_master_private *master_priv;
624 u32 iir, new_iir;
625 u32 pipea_stats, pipeb_stats;
626 u32 vblank_status;
627 u32 vblank_enable;
628 int vblank = 0;
629 unsigned long irqflags;
630 int irq_received;
631 int ret = IRQ_NONE;
632
633 atomic_inc(&dev_priv->irq_received);
634
635 if (IS_IRONLAKE(dev))
636 return ironlake_irq_handler(dev);
637
638 iir = I915_READ(IIR);
639
640 if (IS_I965G(dev)) {
641 vblank_status = I915_START_VBLANK_INTERRUPT_STATUS;
642 vblank_enable = PIPE_START_VBLANK_INTERRUPT_ENABLE;
643 } else {
644 vblank_status = I915_VBLANK_INTERRUPT_STATUS;
645 vblank_enable = I915_VBLANK_INTERRUPT_ENABLE;
646 }
647
648 for (;;) {
649 irq_received = iir != 0;
650
651 /* Can't rely on pipestat interrupt bit in iir as it might
652 * have been cleared after the pipestat interrupt was received.
653 * It doesn't set the bit in iir again, but it still produces
654 * interrupts (for non-MSI).
655 */
656 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
657 pipea_stats = I915_READ(PIPEASTAT);
658 pipeb_stats = I915_READ(PIPEBSTAT);
659
660 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
661 i915_handle_error(dev, false);
662
663 /*
664 * Clear the PIPE(A|B)STAT regs before the IIR
665 */
666 if (pipea_stats & 0x8000ffff) {
667 if (pipea_stats & PIPE_FIFO_UNDERRUN_STATUS)
668 DRM_DEBUG_DRIVER("pipe a underrun\n");
669 I915_WRITE(PIPEASTAT, pipea_stats);
670 irq_received = 1;
671 }
672
673 if (pipeb_stats & 0x8000ffff) {
674 if (pipeb_stats & PIPE_FIFO_UNDERRUN_STATUS)
675 DRM_DEBUG_DRIVER("pipe b underrun\n");
676 I915_WRITE(PIPEBSTAT, pipeb_stats);
677 irq_received = 1;
678 }
679 spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
680
681 if (!irq_received)
682 break;
683
684 ret = IRQ_HANDLED;
685
686 /* Consume port. Then clear IIR or we'll miss events */
687 if ((I915_HAS_HOTPLUG(dev)) &&
688 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
689 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
690
691 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
692 hotplug_status);
693 if (hotplug_status & dev_priv->hotplug_supported_mask)
694 queue_work(dev_priv->wq,
695 &dev_priv->hotplug_work);
696
697 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
698 I915_READ(PORT_HOTPLUG_STAT);
699 }
700
701 I915_WRITE(IIR, iir);
702 new_iir = I915_READ(IIR); /* Flush posted writes */
703
704 if (dev->primary->master) {
705 master_priv = dev->primary->master->driver_priv;
706 if (master_priv->sarea_priv)
707 master_priv->sarea_priv->last_dispatch =
708 READ_BREADCRUMB(dev_priv);
709 }
710
711 if (iir & I915_USER_INTERRUPT) {
712 u32 seqno = i915_get_gem_seqno(dev);
713 dev_priv->mm.irq_gem_seqno = seqno;
714 trace_i915_gem_request_complete(dev, seqno);
715 DRM_WAKEUP(&dev_priv->irq_queue);
716 dev_priv->hangcheck_count = 0;
717 mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD);
718 }
719
720 if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT)
721 intel_prepare_page_flip(dev, 0);
722
723 if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT)
724 intel_prepare_page_flip(dev, 1);
725
726 if (pipea_stats & vblank_status) {
727 vblank++;
728 drm_handle_vblank(dev, 0);
729 intel_finish_page_flip(dev, 0);
730 }
731
732 if (pipeb_stats & vblank_status) {
733 vblank++;
734 drm_handle_vblank(dev, 1);
735 intel_finish_page_flip(dev, 1);
736 }
737
738 if ((pipeb_stats & I915_LEGACY_BLC_EVENT_STATUS) ||
739 (iir & I915_ASLE_INTERRUPT))
740 opregion_asle_intr(dev);
741
742 /* With MSI, interrupts are only generated when iir
743 * transitions from zero to nonzero. If another bit got
744 * set while we were handling the existing iir bits, then
745 * we would never get another interrupt.
746 *
747 * This is fine on non-MSI as well, as if we hit this path
748 * we avoid exiting the interrupt handler only to generate
749 * another one.
750 *
751 * Note that for MSI this could cause a stray interrupt report
752 * if an interrupt landed in the time between writing IIR and
753 * the posting read. This should be rare enough to never
754 * trigger the 99% of 100,000 interrupts test for disabling
755 * stray interrupts.
756 */
757 iir = new_iir;
758 }
759
760 return ret;
761 }
762
763 static int i915_emit_irq(struct drm_device * dev)
764 {
765 drm_i915_private_t *dev_priv = dev->dev_private;
766 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
767 RING_LOCALS;
768
769 i915_kernel_lost_context(dev);
770
771 DRM_DEBUG_DRIVER("\n");
772
773 dev_priv->counter++;
774 if (dev_priv->counter > 0x7FFFFFFFUL)
775 dev_priv->counter = 1;
776 if (master_priv->sarea_priv)
777 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
778
779 BEGIN_LP_RING(4);
780 OUT_RING(MI_STORE_DWORD_INDEX);
781 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
782 OUT_RING(dev_priv->counter);
783 OUT_RING(MI_USER_INTERRUPT);
784 ADVANCE_LP_RING();
785
786 return dev_priv->counter;
787 }
788
789 void i915_user_irq_get(struct drm_device *dev)
790 {
791 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
792 unsigned long irqflags;
793
794 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
795 if (dev->irq_enabled && (++dev_priv->user_irq_refcount == 1)) {
796 if (IS_IRONLAKE(dev))
797 ironlake_enable_graphics_irq(dev_priv, GT_USER_INTERRUPT);
798 else
799 i915_enable_irq(dev_priv, I915_USER_INTERRUPT);
800 }
801 spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
802 }
803
804 void i915_user_irq_put(struct drm_device *dev)
805 {
806 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
807 unsigned long irqflags;
808
809 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
810 BUG_ON(dev->irq_enabled && dev_priv->user_irq_refcount <= 0);
811 if (dev->irq_enabled && (--dev_priv->user_irq_refcount == 0)) {
812 if (IS_IRONLAKE(dev))
813 ironlake_disable_graphics_irq(dev_priv, GT_USER_INTERRUPT);
814 else
815 i915_disable_irq(dev_priv, I915_USER_INTERRUPT);
816 }
817 spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
818 }
819
820 void i915_trace_irq_get(struct drm_device *dev, u32 seqno)
821 {
822 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
823
824 if (dev_priv->trace_irq_seqno == 0)
825 i915_user_irq_get(dev);
826
827 dev_priv->trace_irq_seqno = seqno;
828 }
829
830 static int i915_wait_irq(struct drm_device * dev, int irq_nr)
831 {
832 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
833 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
834 int ret = 0;
835
836 DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr,
837 READ_BREADCRUMB(dev_priv));
838
839 if (READ_BREADCRUMB(dev_priv) >= irq_nr) {
840 if (master_priv->sarea_priv)
841 master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
842 return 0;
843 }
844
845 if (master_priv->sarea_priv)
846 master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
847
848 i915_user_irq_get(dev);
849 DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ,
850 READ_BREADCRUMB(dev_priv) >= irq_nr);
851 i915_user_irq_put(dev);
852
853 if (ret == -EBUSY) {
854 DRM_ERROR("EBUSY -- rec: %d emitted: %d\n",
855 READ_BREADCRUMB(dev_priv), (int)dev_priv->counter);
856 }
857
858 return ret;
859 }
860
861 /* Needs the lock as it touches the ring.
862 */
863 int i915_irq_emit(struct drm_device *dev, void *data,
864 struct drm_file *file_priv)
865 {
866 drm_i915_private_t *dev_priv = dev->dev_private;
867 drm_i915_irq_emit_t *emit = data;
868 int result;
869
870 if (!dev_priv || !dev_priv->ring.virtual_start) {
871 DRM_ERROR("called with no initialization\n");
872 return -EINVAL;
873 }
874
875 RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
876
877 mutex_lock(&dev->struct_mutex);
878 result = i915_emit_irq(dev);
879 mutex_unlock(&dev->struct_mutex);
880
881 if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) {
882 DRM_ERROR("copy_to_user\n");
883 return -EFAULT;
884 }
885
886 return 0;
887 }
888
889 /* Doesn't need the hardware lock.
890 */
891 int i915_irq_wait(struct drm_device *dev, void *data,
892 struct drm_file *file_priv)
893 {
894 drm_i915_private_t *dev_priv = dev->dev_private;
895 drm_i915_irq_wait_t *irqwait = data;
896
897 if (!dev_priv) {
898 DRM_ERROR("called with no initialization\n");
899 return -EINVAL;
900 }
901
902 return i915_wait_irq(dev, irqwait->irq_seq);
903 }
904
905 /* Called from drm generic code, passed 'crtc' which
906 * we use as a pipe index
907 */
908 int i915_enable_vblank(struct drm_device *dev, int pipe)
909 {
910 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
911 unsigned long irqflags;
912 int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
913 u32 pipeconf;
914
915 pipeconf = I915_READ(pipeconf_reg);
916 if (!(pipeconf & PIPEACONF_ENABLE))
917 return -EINVAL;
918
919 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
920 if (IS_IRONLAKE(dev))
921 ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
922 DE_PIPEA_VBLANK: DE_PIPEB_VBLANK);
923 else if (IS_I965G(dev))
924 i915_enable_pipestat(dev_priv, pipe,
925 PIPE_START_VBLANK_INTERRUPT_ENABLE);
926 else
927 i915_enable_pipestat(dev_priv, pipe,
928 PIPE_VBLANK_INTERRUPT_ENABLE);
929 spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
930 return 0;
931 }
932
933 /* Called from drm generic code, passed 'crtc' which
934 * we use as a pipe index
935 */
936 void i915_disable_vblank(struct drm_device *dev, int pipe)
937 {
938 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
939 unsigned long irqflags;
940
941 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
942 if (IS_IRONLAKE(dev))
943 ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
944 DE_PIPEA_VBLANK: DE_PIPEB_VBLANK);
945 else
946 i915_disable_pipestat(dev_priv, pipe,
947 PIPE_VBLANK_INTERRUPT_ENABLE |
948 PIPE_START_VBLANK_INTERRUPT_ENABLE);
949 spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
950 }
951
952 void i915_enable_interrupt (struct drm_device *dev)
953 {
954 struct drm_i915_private *dev_priv = dev->dev_private;
955
956 if (!IS_IRONLAKE(dev))
957 opregion_enable_asle(dev);
958 dev_priv->irq_enabled = 1;
959 }
960
961
962 /* Set the vblank monitor pipe
963 */
964 int i915_vblank_pipe_set(struct drm_device *dev, void *data,
965 struct drm_file *file_priv)
966 {
967 drm_i915_private_t *dev_priv = dev->dev_private;
968
969 if (!dev_priv) {
970 DRM_ERROR("called with no initialization\n");
971 return -EINVAL;
972 }
973
974 return 0;
975 }
976
977 int i915_vblank_pipe_get(struct drm_device *dev, void *data,
978 struct drm_file *file_priv)
979 {
980 drm_i915_private_t *dev_priv = dev->dev_private;
981 drm_i915_vblank_pipe_t *pipe = data;
982
983 if (!dev_priv) {
984 DRM_ERROR("called with no initialization\n");
985 return -EINVAL;
986 }
987
988 pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
989
990 return 0;
991 }
992
993 /**
994 * Schedule buffer swap at given vertical blank.
995 */
996 int i915_vblank_swap(struct drm_device *dev, void *data,
997 struct drm_file *file_priv)
998 {
999 /* The delayed swap mechanism was fundamentally racy, and has been
1000 * removed. The model was that the client requested a delayed flip/swap
1001 * from the kernel, then waited for vblank before continuing to perform
1002 * rendering. The problem was that the kernel might wake the client
1003 * up before it dispatched the vblank swap (since the lock has to be
1004 * held while touching the ringbuffer), in which case the client would
1005 * clear and start the next frame before the swap occurred, and
1006 * flicker would occur in addition to likely missing the vblank.
1007 *
1008 * In the absence of this ioctl, userland falls back to a correct path
1009 * of waiting for a vblank, then dispatching the swap on its own.
1010 * Context switching to userland and back is plenty fast enough for
1011 * meeting the requirements of vblank swapping.
1012 */
1013 return -EINVAL;
1014 }
1015
1016 struct drm_i915_gem_request *i915_get_tail_request(struct drm_device *dev) {
1017 drm_i915_private_t *dev_priv = dev->dev_private;
1018 return list_entry(dev_priv->mm.request_list.prev, struct drm_i915_gem_request, list);
1019 }
1020
1021 /**
1022 * This is called when the chip hasn't reported back with completed
1023 * batchbuffers in a long time. The first time this is called we simply record
1024 * ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses
1025 * again, we assume the chip is wedged and try to fix it.
1026 */
1027 void i915_hangcheck_elapsed(unsigned long data)
1028 {
1029 struct drm_device *dev = (struct drm_device *)data;
1030 drm_i915_private_t *dev_priv = dev->dev_private;
1031 uint32_t acthd;
1032
1033 if (!IS_I965G(dev))
1034 acthd = I915_READ(ACTHD);
1035 else
1036 acthd = I915_READ(ACTHD_I965);
1037
1038 /* If all work is done then ACTHD clearly hasn't advanced. */
1039 if (list_empty(&dev_priv->mm.request_list) ||
1040 i915_seqno_passed(i915_get_gem_seqno(dev), i915_get_tail_request(dev)->seqno)) {
1041 dev_priv->hangcheck_count = 0;
1042 return;
1043 }
1044
1045 if (dev_priv->last_acthd == acthd && dev_priv->hangcheck_count > 0) {
1046 DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
1047 i915_handle_error(dev, true);
1048 return;
1049 }
1050
1051 /* Reset timer case chip hangs without another request being added */
1052 mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD);
1053
1054 if (acthd != dev_priv->last_acthd)
1055 dev_priv->hangcheck_count = 0;
1056 else
1057 dev_priv->hangcheck_count++;
1058
1059 dev_priv->last_acthd = acthd;
1060 }
1061
1062 /* drm_dma.h hooks
1063 */
1064 static void ironlake_irq_preinstall(struct drm_device *dev)
1065 {
1066 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1067
1068 I915_WRITE(HWSTAM, 0xeffe);
1069
1070 /* XXX hotplug from PCH */
1071
1072 I915_WRITE(DEIMR, 0xffffffff);
1073 I915_WRITE(DEIER, 0x0);
1074 (void) I915_READ(DEIER);
1075
1076 /* and GT */
1077 I915_WRITE(GTIMR, 0xffffffff);
1078 I915_WRITE(GTIER, 0x0);
1079 (void) I915_READ(GTIER);
1080
1081 /* south display irq */
1082 I915_WRITE(SDEIMR, 0xffffffff);
1083 I915_WRITE(SDEIER, 0x0);
1084 (void) I915_READ(SDEIER);
1085 }
1086
1087 static int ironlake_irq_postinstall(struct drm_device *dev)
1088 {
1089 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1090 /* enable kind of interrupts always enabled */
1091 u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
1092 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE;
1093 u32 render_mask = GT_USER_INTERRUPT;
1094 u32 hotplug_mask = SDE_CRT_HOTPLUG | SDE_PORTB_HOTPLUG |
1095 SDE_PORTC_HOTPLUG | SDE_PORTD_HOTPLUG;
1096
1097 dev_priv->irq_mask_reg = ~display_mask;
1098 dev_priv->de_irq_enable_reg = display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK;
1099
1100 /* should always can generate irq */
1101 I915_WRITE(DEIIR, I915_READ(DEIIR));
1102 I915_WRITE(DEIMR, dev_priv->irq_mask_reg);
1103 I915_WRITE(DEIER, dev_priv->de_irq_enable_reg);
1104 (void) I915_READ(DEIER);
1105
1106 /* user interrupt should be enabled, but masked initial */
1107 dev_priv->gt_irq_mask_reg = 0xffffffff;
1108 dev_priv->gt_irq_enable_reg = render_mask;
1109
1110 I915_WRITE(GTIIR, I915_READ(GTIIR));
1111 I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg);
1112 I915_WRITE(GTIER, dev_priv->gt_irq_enable_reg);
1113 (void) I915_READ(GTIER);
1114
1115 dev_priv->pch_irq_mask_reg = ~hotplug_mask;
1116 dev_priv->pch_irq_enable_reg = hotplug_mask;
1117
1118 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
1119 I915_WRITE(SDEIMR, dev_priv->pch_irq_mask_reg);
1120 I915_WRITE(SDEIER, dev_priv->pch_irq_enable_reg);
1121 (void) I915_READ(SDEIER);
1122
1123 if (IS_IRONLAKE_M(dev)) {
1124 /* Clear & enable PCU event interrupts */
1125 I915_WRITE(DEIIR, DE_PCU_EVENT);
1126 I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
1127 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
1128 }
1129
1130 return 0;
1131 }
1132
1133 void i915_driver_irq_preinstall(struct drm_device * dev)
1134 {
1135 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1136
1137 atomic_set(&dev_priv->irq_received, 0);
1138
1139 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
1140 INIT_WORK(&dev_priv->error_work, i915_error_work_func);
1141
1142 if (IS_IRONLAKE(dev)) {
1143 ironlake_irq_preinstall(dev);
1144 return;
1145 }
1146
1147 if (I915_HAS_HOTPLUG(dev)) {
1148 I915_WRITE(PORT_HOTPLUG_EN, 0);
1149 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
1150 }
1151
1152 I915_WRITE(HWSTAM, 0xeffe);
1153 I915_WRITE(PIPEASTAT, 0);
1154 I915_WRITE(PIPEBSTAT, 0);
1155 I915_WRITE(IMR, 0xffffffff);
1156 I915_WRITE(IER, 0x0);
1157 (void) I915_READ(IER);
1158 }
1159
1160 /*
1161 * Must be called after intel_modeset_init or hotplug interrupts won't be
1162 * enabled correctly.
1163 */
1164 int i915_driver_irq_postinstall(struct drm_device *dev)
1165 {
1166 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1167 u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR;
1168 u32 error_mask;
1169
1170 DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);
1171
1172 dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
1173
1174 if (IS_IRONLAKE(dev))
1175 return ironlake_irq_postinstall(dev);
1176
1177 /* Unmask the interrupts that we always want on. */
1178 dev_priv->irq_mask_reg = ~I915_INTERRUPT_ENABLE_FIX;
1179
1180 dev_priv->pipestat[0] = 0;
1181 dev_priv->pipestat[1] = 0;
1182
1183 if (I915_HAS_HOTPLUG(dev)) {
1184 u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
1185
1186 /* Note HDMI and DP share bits */
1187 if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
1188 hotplug_en |= HDMIB_HOTPLUG_INT_EN;
1189 if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
1190 hotplug_en |= HDMIC_HOTPLUG_INT_EN;
1191 if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
1192 hotplug_en |= HDMID_HOTPLUG_INT_EN;
1193 if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
1194 hotplug_en |= SDVOC_HOTPLUG_INT_EN;
1195 if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
1196 hotplug_en |= SDVOB_HOTPLUG_INT_EN;
1197 if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS)
1198 hotplug_en |= CRT_HOTPLUG_INT_EN;
1199 /* Ignore TV since it's buggy */
1200
1201 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
1202
1203 /* Enable in IER... */
1204 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
1205 /* and unmask in IMR */
1206 i915_enable_irq(dev_priv, I915_DISPLAY_PORT_INTERRUPT);
1207 }
1208
1209 /*
1210 * Enable some error detection, note the instruction error mask
1211 * bit is reserved, so we leave it masked.
1212 */
1213 if (IS_G4X(dev)) {
1214 error_mask = ~(GM45_ERROR_PAGE_TABLE |
1215 GM45_ERROR_MEM_PRIV |
1216 GM45_ERROR_CP_PRIV |
1217 I915_ERROR_MEMORY_REFRESH);
1218 } else {
1219 error_mask = ~(I915_ERROR_PAGE_TABLE |
1220 I915_ERROR_MEMORY_REFRESH);
1221 }
1222 I915_WRITE(EMR, error_mask);
1223
1224 /* Disable pipe interrupt enables, clear pending pipe status */
1225 I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff);
1226 I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff);
1227 /* Clear pending interrupt status */
1228 I915_WRITE(IIR, I915_READ(IIR));
1229
1230 I915_WRITE(IER, enable_mask);
1231 I915_WRITE(IMR, dev_priv->irq_mask_reg);
1232 (void) I915_READ(IER);
1233
1234 opregion_enable_asle(dev);
1235
1236 return 0;
1237 }
1238
1239 static void ironlake_irq_uninstall(struct drm_device *dev)
1240 {
1241 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1242 I915_WRITE(HWSTAM, 0xffffffff);
1243
1244 I915_WRITE(DEIMR, 0xffffffff);
1245 I915_WRITE(DEIER, 0x0);
1246 I915_WRITE(DEIIR, I915_READ(DEIIR));
1247
1248 I915_WRITE(GTIMR, 0xffffffff);
1249 I915_WRITE(GTIER, 0x0);
1250 I915_WRITE(GTIIR, I915_READ(GTIIR));
1251 }
1252
1253 void i915_driver_irq_uninstall(struct drm_device * dev)
1254 {
1255 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1256
1257 if (!dev_priv)
1258 return;
1259
1260 dev_priv->vblank_pipe = 0;
1261
1262 if (IS_IRONLAKE(dev)) {
1263 ironlake_irq_uninstall(dev);
1264 return;
1265 }
1266
1267 if (I915_HAS_HOTPLUG(dev)) {
1268 I915_WRITE(PORT_HOTPLUG_EN, 0);
1269 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
1270 }
1271
1272 I915_WRITE(HWSTAM, 0xffffffff);
1273 I915_WRITE(PIPEASTAT, 0);
1274 I915_WRITE(PIPEBSTAT, 0);
1275 I915_WRITE(IMR, 0xffffffff);
1276 I915_WRITE(IER, 0x0);
1277
1278 I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff);
1279 I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff);
1280 I915_WRITE(IIR, I915_READ(IIR));
1281 }
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