1
2
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5
6
7#include <linux/mm.h>
8#include <linux/module.h>
9#include <linux/file.h>
10#include <linux/slab.h>
11#include <linux/sched/signal.h>
12#include <linux/time.h>
13#include <linux/pm_qos.h>
14#include <linux/io.h>
15#include <linux/dma-mapping.h>
16#include <sound/core.h>
17#include <sound/control.h>
18#include <sound/info.h>
19#include <sound/pcm.h>
20#include <sound/pcm_params.h>
21#include <sound/timer.h>
22#include <sound/minors.h>
23#include <linux/uio.h>
24#include <linux/delay.h>
25
26#include "pcm_local.h"
27
28#ifdef CONFIG_SND_DEBUG
29#define CREATE_TRACE_POINTS
30#include "pcm_param_trace.h"
31#else
32#define trace_hw_mask_param_enabled() 0
33#define trace_hw_interval_param_enabled() 0
34#define trace_hw_mask_param(substream, type, index, prev, curr)
35#define trace_hw_interval_param(substream, type, index, prev, curr)
36#endif
37
38
39
40
41
42struct snd_pcm_hw_params_old {
43 unsigned int flags;
44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45 SNDRV_PCM_HW_PARAM_ACCESS + 1];
46 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
48 unsigned int rmask;
49 unsigned int cmask;
50 unsigned int info;
51 unsigned int msbits;
52 unsigned int rate_num;
53 unsigned int rate_den;
54 snd_pcm_uframes_t fifo_size;
55 unsigned char reserved[64];
56};
57
58#ifdef CONFIG_SND_SUPPORT_OLD_API
59#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
61
62static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63 struct snd_pcm_hw_params_old __user * _oparams);
64static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
66#endif
67static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
68
69
70
71
72
73static DECLARE_RWSEM(snd_pcm_link_rwsem);
74
75void snd_pcm_group_init(struct snd_pcm_group *group)
76{
77 spin_lock_init(&group->lock);
78 mutex_init(&group->mutex);
79 INIT_LIST_HEAD(&group->substreams);
80 refcount_set(&group->refs, 1);
81}
82
83
84#define DEFINE_PCM_GROUP_LOCK(action, mutex_action) \
85static void snd_pcm_group_ ## action(struct snd_pcm_group *group, bool nonatomic) \
86{ \
87 if (nonatomic) \
88 mutex_ ## mutex_action(&group->mutex); \
89 else \
90 spin_ ## action(&group->lock); \
91}
92
93DEFINE_PCM_GROUP_LOCK(lock, lock);
94DEFINE_PCM_GROUP_LOCK(unlock, unlock);
95DEFINE_PCM_GROUP_LOCK(lock_irq, lock);
96DEFINE_PCM_GROUP_LOCK(unlock_irq, unlock);
97
98
99
100
101
102
103
104
105
106void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
107{
108 snd_pcm_group_lock(&substream->self_group, substream->pcm->nonatomic);
109}
110EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
111
112
113
114
115
116
117
118void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
119{
120 snd_pcm_group_unlock(&substream->self_group, substream->pcm->nonatomic);
121}
122EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
123
124
125
126
127
128
129
130
131
132void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
133{
134 snd_pcm_group_lock_irq(&substream->self_group,
135 substream->pcm->nonatomic);
136}
137EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
138
139
140
141
142
143
144
145void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
146{
147 snd_pcm_group_unlock_irq(&substream->self_group,
148 substream->pcm->nonatomic);
149}
150EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
151
152unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
153{
154 unsigned long flags = 0;
155 if (substream->pcm->nonatomic)
156 mutex_lock(&substream->self_group.mutex);
157 else
158 spin_lock_irqsave(&substream->self_group.lock, flags);
159 return flags;
160}
161EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
162
163
164
165
166
167
168
169
170void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
171 unsigned long flags)
172{
173 if (substream->pcm->nonatomic)
174 mutex_unlock(&substream->self_group.mutex);
175 else
176 spin_unlock_irqrestore(&substream->self_group.lock, flags);
177}
178EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
179
180int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
181{
182 struct snd_pcm *pcm = substream->pcm;
183 struct snd_pcm_str *pstr = substream->pstr;
184
185 memset(info, 0, sizeof(*info));
186 info->card = pcm->card->number;
187 info->device = pcm->device;
188 info->stream = substream->stream;
189 info->subdevice = substream->number;
190 strlcpy(info->id, pcm->id, sizeof(info->id));
191 strlcpy(info->name, pcm->name, sizeof(info->name));
192 info->dev_class = pcm->dev_class;
193 info->dev_subclass = pcm->dev_subclass;
194 info->subdevices_count = pstr->substream_count;
195 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
196 strlcpy(info->subname, substream->name, sizeof(info->subname));
197
198 return 0;
199}
200
201int snd_pcm_info_user(struct snd_pcm_substream *substream,
202 struct snd_pcm_info __user * _info)
203{
204 struct snd_pcm_info *info;
205 int err;
206
207 info = kmalloc(sizeof(*info), GFP_KERNEL);
208 if (! info)
209 return -ENOMEM;
210 err = snd_pcm_info(substream, info);
211 if (err >= 0) {
212 if (copy_to_user(_info, info, sizeof(*info)))
213 err = -EFAULT;
214 }
215 kfree(info);
216 return err;
217}
218
219static bool hw_support_mmap(struct snd_pcm_substream *substream)
220{
221 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
222 return false;
223
224#if defined(CONFIG_ARCH_NO_COHERENT_DMA_MMAP) || !defined(CONFIG_HAS_DMA)
225 if (!substream->ops->mmap &&
226 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
227 return false;
228#endif
229 return true;
230}
231
232static int constrain_mask_params(struct snd_pcm_substream *substream,
233 struct snd_pcm_hw_params *params)
234{
235 struct snd_pcm_hw_constraints *constrs =
236 &substream->runtime->hw_constraints;
237 struct snd_mask *m;
238 unsigned int k;
239 struct snd_mask old_mask;
240 int changed;
241
242 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
243 m = hw_param_mask(params, k);
244 if (snd_mask_empty(m))
245 return -EINVAL;
246
247
248 if (!(params->rmask & (1 << k)))
249 continue;
250
251 if (trace_hw_mask_param_enabled())
252 old_mask = *m;
253
254 changed = snd_mask_refine(m, constrs_mask(constrs, k));
255 if (changed < 0)
256 return changed;
257 if (changed == 0)
258 continue;
259
260
261 trace_hw_mask_param(substream, k, 0, &old_mask, m);
262 params->cmask |= 1 << k;
263 }
264
265 return 0;
266}
267
268static int constrain_interval_params(struct snd_pcm_substream *substream,
269 struct snd_pcm_hw_params *params)
270{
271 struct snd_pcm_hw_constraints *constrs =
272 &substream->runtime->hw_constraints;
273 struct snd_interval *i;
274 unsigned int k;
275 struct snd_interval old_interval;
276 int changed;
277
278 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
279 i = hw_param_interval(params, k);
280 if (snd_interval_empty(i))
281 return -EINVAL;
282
283
284 if (!(params->rmask & (1 << k)))
285 continue;
286
287 if (trace_hw_interval_param_enabled())
288 old_interval = *i;
289
290 changed = snd_interval_refine(i, constrs_interval(constrs, k));
291 if (changed < 0)
292 return changed;
293 if (changed == 0)
294 continue;
295
296
297 trace_hw_interval_param(substream, k, 0, &old_interval, i);
298 params->cmask |= 1 << k;
299 }
300
301 return 0;
302}
303
304static int constrain_params_by_rules(struct snd_pcm_substream *substream,
305 struct snd_pcm_hw_params *params)
306{
307 struct snd_pcm_hw_constraints *constrs =
308 &substream->runtime->hw_constraints;
309 unsigned int k;
310 unsigned int *rstamps;
311 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
312 unsigned int stamp;
313 struct snd_pcm_hw_rule *r;
314 unsigned int d;
315 struct snd_mask old_mask;
316 struct snd_interval old_interval;
317 bool again;
318 int changed, err = 0;
319
320
321
322
323
324
325
326 rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL);
327 if (!rstamps)
328 return -ENOMEM;
329
330
331
332
333
334
335
336
337
338
339 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
340 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
341
342
343 stamp = 2;
344retry:
345
346 again = false;
347 for (k = 0; k < constrs->rules_num; k++) {
348 r = &constrs->rules[k];
349
350
351
352
353
354
355
356 if (r->cond && !(r->cond & params->flags))
357 continue;
358
359
360
361
362
363
364
365
366
367
368
369 for (d = 0; r->deps[d] >= 0; d++) {
370 if (vstamps[r->deps[d]] > rstamps[k])
371 break;
372 }
373 if (r->deps[d] < 0)
374 continue;
375
376 if (trace_hw_mask_param_enabled()) {
377 if (hw_is_mask(r->var))
378 old_mask = *hw_param_mask(params, r->var);
379 }
380 if (trace_hw_interval_param_enabled()) {
381 if (hw_is_interval(r->var))
382 old_interval = *hw_param_interval(params, r->var);
383 }
384
385 changed = r->func(params, r);
386 if (changed < 0) {
387 err = changed;
388 goto out;
389 }
390
391
392
393
394
395
396 if (changed && r->var >= 0) {
397 if (hw_is_mask(r->var)) {
398 trace_hw_mask_param(substream, r->var,
399 k + 1, &old_mask,
400 hw_param_mask(params, r->var));
401 }
402 if (hw_is_interval(r->var)) {
403 trace_hw_interval_param(substream, r->var,
404 k + 1, &old_interval,
405 hw_param_interval(params, r->var));
406 }
407
408 params->cmask |= (1 << r->var);
409 vstamps[r->var] = stamp;
410 again = true;
411 }
412
413 rstamps[k] = stamp++;
414 }
415
416
417 if (again)
418 goto retry;
419
420 out:
421 kfree(rstamps);
422 return err;
423}
424
425static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
426 struct snd_pcm_hw_params *params)
427{
428 const struct snd_interval *i;
429 const struct snd_mask *m;
430 int err;
431
432 if (!params->msbits) {
433 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
434 if (snd_interval_single(i))
435 params->msbits = snd_interval_value(i);
436 }
437
438 if (!params->rate_den) {
439 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
440 if (snd_interval_single(i)) {
441 params->rate_num = snd_interval_value(i);
442 params->rate_den = 1;
443 }
444 }
445
446 if (!params->fifo_size) {
447 m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
448 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
449 if (snd_mask_single(m) && snd_interval_single(i)) {
450 err = substream->ops->ioctl(substream,
451 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
452 if (err < 0)
453 return err;
454 }
455 }
456
457 if (!params->info) {
458 params->info = substream->runtime->hw.info;
459 params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
460 SNDRV_PCM_INFO_DRAIN_TRIGGER);
461 if (!hw_support_mmap(substream))
462 params->info &= ~(SNDRV_PCM_INFO_MMAP |
463 SNDRV_PCM_INFO_MMAP_VALID);
464 }
465
466 return 0;
467}
468
469int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
470 struct snd_pcm_hw_params *params)
471{
472 int err;
473
474 params->info = 0;
475 params->fifo_size = 0;
476 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
477 params->msbits = 0;
478 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
479 params->rate_num = 0;
480 params->rate_den = 0;
481 }
482
483 err = constrain_mask_params(substream, params);
484 if (err < 0)
485 return err;
486
487 err = constrain_interval_params(substream, params);
488 if (err < 0)
489 return err;
490
491 err = constrain_params_by_rules(substream, params);
492 if (err < 0)
493 return err;
494
495 params->rmask = 0;
496
497 return 0;
498}
499EXPORT_SYMBOL(snd_pcm_hw_refine);
500
501static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
502 struct snd_pcm_hw_params __user * _params)
503{
504 struct snd_pcm_hw_params *params;
505 int err;
506
507 params = memdup_user(_params, sizeof(*params));
508 if (IS_ERR(params))
509 return PTR_ERR(params);
510
511 err = snd_pcm_hw_refine(substream, params);
512 if (err < 0)
513 goto end;
514
515 err = fixup_unreferenced_params(substream, params);
516 if (err < 0)
517 goto end;
518
519 if (copy_to_user(_params, params, sizeof(*params)))
520 err = -EFAULT;
521end:
522 kfree(params);
523 return err;
524}
525
526static int period_to_usecs(struct snd_pcm_runtime *runtime)
527{
528 int usecs;
529
530 if (! runtime->rate)
531 return -1;
532
533
534 usecs = (750000 / runtime->rate) * runtime->period_size;
535 usecs += ((750000 % runtime->rate) * runtime->period_size) /
536 runtime->rate;
537
538 return usecs;
539}
540
541static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
542{
543 snd_pcm_stream_lock_irq(substream);
544 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
545 substream->runtime->status->state = state;
546 snd_pcm_stream_unlock_irq(substream);
547}
548
549static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
550 int event)
551{
552#ifdef CONFIG_SND_PCM_TIMER
553 if (substream->timer)
554 snd_timer_notify(substream->timer, event,
555 &substream->runtime->trigger_tstamp);
556#endif
557}
558
559
560
561
562
563
564
565
566
567
568
569
570
571static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
572 struct snd_pcm_hw_params *params)
573{
574 static const int vars[] = {
575 SNDRV_PCM_HW_PARAM_ACCESS,
576 SNDRV_PCM_HW_PARAM_FORMAT,
577 SNDRV_PCM_HW_PARAM_SUBFORMAT,
578 SNDRV_PCM_HW_PARAM_CHANNELS,
579 SNDRV_PCM_HW_PARAM_RATE,
580 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
581 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
582 SNDRV_PCM_HW_PARAM_TICK_TIME,
583 -1
584 };
585 const int *v;
586 struct snd_mask old_mask;
587 struct snd_interval old_interval;
588 int changed;
589
590 for (v = vars; *v != -1; v++) {
591
592 if (trace_hw_mask_param_enabled()) {
593 if (hw_is_mask(*v))
594 old_mask = *hw_param_mask(params, *v);
595 }
596 if (trace_hw_interval_param_enabled()) {
597 if (hw_is_interval(*v))
598 old_interval = *hw_param_interval(params, *v);
599 }
600 if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
601 changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
602 else
603 changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
604 if (changed < 0)
605 return changed;
606 if (changed == 0)
607 continue;
608
609
610 if (hw_is_mask(*v)) {
611 trace_hw_mask_param(pcm, *v, 0, &old_mask,
612 hw_param_mask(params, *v));
613 }
614 if (hw_is_interval(*v)) {
615 trace_hw_interval_param(pcm, *v, 0, &old_interval,
616 hw_param_interval(params, *v));
617 }
618 }
619
620 return 0;
621}
622
623static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
624 struct snd_pcm_hw_params *params)
625{
626 struct snd_pcm_runtime *runtime;
627 int err, usecs;
628 unsigned int bits;
629 snd_pcm_uframes_t frames;
630
631 if (PCM_RUNTIME_CHECK(substream))
632 return -ENXIO;
633 runtime = substream->runtime;
634 snd_pcm_stream_lock_irq(substream);
635 switch (runtime->status->state) {
636 case SNDRV_PCM_STATE_OPEN:
637 case SNDRV_PCM_STATE_SETUP:
638 case SNDRV_PCM_STATE_PREPARED:
639 break;
640 default:
641 snd_pcm_stream_unlock_irq(substream);
642 return -EBADFD;
643 }
644 snd_pcm_stream_unlock_irq(substream);
645#if IS_ENABLED(CONFIG_SND_PCM_OSS)
646 if (!substream->oss.oss)
647#endif
648 if (atomic_read(&substream->mmap_count))
649 return -EBADFD;
650
651 params->rmask = ~0U;
652 err = snd_pcm_hw_refine(substream, params);
653 if (err < 0)
654 goto _error;
655
656 err = snd_pcm_hw_params_choose(substream, params);
657 if (err < 0)
658 goto _error;
659
660 err = fixup_unreferenced_params(substream, params);
661 if (err < 0)
662 goto _error;
663
664 if (substream->ops->hw_params != NULL) {
665 err = substream->ops->hw_params(substream, params);
666 if (err < 0)
667 goto _error;
668 }
669
670 runtime->access = params_access(params);
671 runtime->format = params_format(params);
672 runtime->subformat = params_subformat(params);
673 runtime->channels = params_channels(params);
674 runtime->rate = params_rate(params);
675 runtime->period_size = params_period_size(params);
676 runtime->periods = params_periods(params);
677 runtime->buffer_size = params_buffer_size(params);
678 runtime->info = params->info;
679 runtime->rate_num = params->rate_num;
680 runtime->rate_den = params->rate_den;
681 runtime->no_period_wakeup =
682 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
683 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
684
685 bits = snd_pcm_format_physical_width(runtime->format);
686 runtime->sample_bits = bits;
687 bits *= runtime->channels;
688 runtime->frame_bits = bits;
689 frames = 1;
690 while (bits % 8 != 0) {
691 bits *= 2;
692 frames *= 2;
693 }
694 runtime->byte_align = bits / 8;
695 runtime->min_align = frames;
696
697
698 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
699 runtime->period_step = 1;
700 runtime->control->avail_min = runtime->period_size;
701 runtime->start_threshold = 1;
702 runtime->stop_threshold = runtime->buffer_size;
703 runtime->silence_threshold = 0;
704 runtime->silence_size = 0;
705 runtime->boundary = runtime->buffer_size;
706 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
707 runtime->boundary *= 2;
708
709 snd_pcm_timer_resolution_change(substream);
710 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
711
712 if (pm_qos_request_active(&substream->latency_pm_qos_req))
713 pm_qos_remove_request(&substream->latency_pm_qos_req);
714 if ((usecs = period_to_usecs(runtime)) >= 0)
715 pm_qos_add_request(&substream->latency_pm_qos_req,
716 PM_QOS_CPU_DMA_LATENCY, usecs);
717 return 0;
718 _error:
719
720
721
722 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
723 if (substream->ops->hw_free != NULL)
724 substream->ops->hw_free(substream);
725 return err;
726}
727
728static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
729 struct snd_pcm_hw_params __user * _params)
730{
731 struct snd_pcm_hw_params *params;
732 int err;
733
734 params = memdup_user(_params, sizeof(*params));
735 if (IS_ERR(params))
736 return PTR_ERR(params);
737
738 err = snd_pcm_hw_params(substream, params);
739 if (err < 0)
740 goto end;
741
742 if (copy_to_user(_params, params, sizeof(*params)))
743 err = -EFAULT;
744end:
745 kfree(params);
746 return err;
747}
748
749static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
750{
751 struct snd_pcm_runtime *runtime;
752 int result = 0;
753
754 if (PCM_RUNTIME_CHECK(substream))
755 return -ENXIO;
756 runtime = substream->runtime;
757 snd_pcm_stream_lock_irq(substream);
758 switch (runtime->status->state) {
759 case SNDRV_PCM_STATE_SETUP:
760 case SNDRV_PCM_STATE_PREPARED:
761 break;
762 default:
763 snd_pcm_stream_unlock_irq(substream);
764 return -EBADFD;
765 }
766 snd_pcm_stream_unlock_irq(substream);
767 if (atomic_read(&substream->mmap_count))
768 return -EBADFD;
769 if (substream->ops->hw_free)
770 result = substream->ops->hw_free(substream);
771 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
772 pm_qos_remove_request(&substream->latency_pm_qos_req);
773 return result;
774}
775
776static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
777 struct snd_pcm_sw_params *params)
778{
779 struct snd_pcm_runtime *runtime;
780 int err;
781
782 if (PCM_RUNTIME_CHECK(substream))
783 return -ENXIO;
784 runtime = substream->runtime;
785 snd_pcm_stream_lock_irq(substream);
786 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
787 snd_pcm_stream_unlock_irq(substream);
788 return -EBADFD;
789 }
790 snd_pcm_stream_unlock_irq(substream);
791
792 if (params->tstamp_mode < 0 ||
793 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
794 return -EINVAL;
795 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
796 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
797 return -EINVAL;
798 if (params->avail_min == 0)
799 return -EINVAL;
800 if (params->silence_size >= runtime->boundary) {
801 if (params->silence_threshold != 0)
802 return -EINVAL;
803 } else {
804 if (params->silence_size > params->silence_threshold)
805 return -EINVAL;
806 if (params->silence_threshold > runtime->buffer_size)
807 return -EINVAL;
808 }
809 err = 0;
810 snd_pcm_stream_lock_irq(substream);
811 runtime->tstamp_mode = params->tstamp_mode;
812 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
813 runtime->tstamp_type = params->tstamp_type;
814 runtime->period_step = params->period_step;
815 runtime->control->avail_min = params->avail_min;
816 runtime->start_threshold = params->start_threshold;
817 runtime->stop_threshold = params->stop_threshold;
818 runtime->silence_threshold = params->silence_threshold;
819 runtime->silence_size = params->silence_size;
820 params->boundary = runtime->boundary;
821 if (snd_pcm_running(substream)) {
822 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
823 runtime->silence_size > 0)
824 snd_pcm_playback_silence(substream, ULONG_MAX);
825 err = snd_pcm_update_state(substream, runtime);
826 }
827 snd_pcm_stream_unlock_irq(substream);
828 return err;
829}
830
831static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
832 struct snd_pcm_sw_params __user * _params)
833{
834 struct snd_pcm_sw_params params;
835 int err;
836 if (copy_from_user(¶ms, _params, sizeof(params)))
837 return -EFAULT;
838 err = snd_pcm_sw_params(substream, ¶ms);
839 if (copy_to_user(_params, ¶ms, sizeof(params)))
840 return -EFAULT;
841 return err;
842}
843
844static inline snd_pcm_uframes_t
845snd_pcm_calc_delay(struct snd_pcm_substream *substream)
846{
847 snd_pcm_uframes_t delay;
848
849 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
850 delay = snd_pcm_playback_hw_avail(substream->runtime);
851 else
852 delay = snd_pcm_capture_avail(substream->runtime);
853 return delay + substream->runtime->delay;
854}
855
856int snd_pcm_status(struct snd_pcm_substream *substream,
857 struct snd_pcm_status *status)
858{
859 struct snd_pcm_runtime *runtime = substream->runtime;
860
861 snd_pcm_stream_lock_irq(substream);
862
863 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
864 &runtime->audio_tstamp_config);
865
866
867 if (runtime->audio_tstamp_config.type_requested ==
868 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
869 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
870 runtime->audio_tstamp_config.type_requested =
871 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
872 else
873 runtime->audio_tstamp_config.type_requested =
874 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
875 runtime->audio_tstamp_report.valid = 0;
876 } else
877 runtime->audio_tstamp_report.valid = 1;
878
879 status->state = runtime->status->state;
880 status->suspended_state = runtime->status->suspended_state;
881 if (status->state == SNDRV_PCM_STATE_OPEN)
882 goto _end;
883 status->trigger_tstamp = runtime->trigger_tstamp;
884 if (snd_pcm_running(substream)) {
885 snd_pcm_update_hw_ptr(substream);
886 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
887 status->tstamp = runtime->status->tstamp;
888 status->driver_tstamp = runtime->driver_tstamp;
889 status->audio_tstamp =
890 runtime->status->audio_tstamp;
891 if (runtime->audio_tstamp_report.valid == 1)
892
893 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
894 &status->audio_tstamp_accuracy,
895 &runtime->audio_tstamp_report);
896
897 goto _tstamp_end;
898 }
899 } else {
900
901 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
902 snd_pcm_gettime(runtime, &status->tstamp);
903 }
904 _tstamp_end:
905 status->appl_ptr = runtime->control->appl_ptr;
906 status->hw_ptr = runtime->status->hw_ptr;
907 status->avail = snd_pcm_avail(substream);
908 status->delay = snd_pcm_running(substream) ?
909 snd_pcm_calc_delay(substream) : 0;
910 status->avail_max = runtime->avail_max;
911 status->overrange = runtime->overrange;
912 runtime->avail_max = 0;
913 runtime->overrange = 0;
914 _end:
915 snd_pcm_stream_unlock_irq(substream);
916 return 0;
917}
918
919static int snd_pcm_status_user(struct snd_pcm_substream *substream,
920 struct snd_pcm_status __user * _status,
921 bool ext)
922{
923 struct snd_pcm_status status;
924 int res;
925
926 memset(&status, 0, sizeof(status));
927
928
929
930
931
932 if (ext && get_user(status.audio_tstamp_data,
933 (u32 __user *)(&_status->audio_tstamp_data)))
934 return -EFAULT;
935 res = snd_pcm_status(substream, &status);
936 if (res < 0)
937 return res;
938 if (copy_to_user(_status, &status, sizeof(status)))
939 return -EFAULT;
940 return 0;
941}
942
943static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
944 struct snd_pcm_channel_info * info)
945{
946 struct snd_pcm_runtime *runtime;
947 unsigned int channel;
948
949 channel = info->channel;
950 runtime = substream->runtime;
951 snd_pcm_stream_lock_irq(substream);
952 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
953 snd_pcm_stream_unlock_irq(substream);
954 return -EBADFD;
955 }
956 snd_pcm_stream_unlock_irq(substream);
957 if (channel >= runtime->channels)
958 return -EINVAL;
959 memset(info, 0, sizeof(*info));
960 info->channel = channel;
961 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
962}
963
964static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
965 struct snd_pcm_channel_info __user * _info)
966{
967 struct snd_pcm_channel_info info;
968 int res;
969
970 if (copy_from_user(&info, _info, sizeof(info)))
971 return -EFAULT;
972 res = snd_pcm_channel_info(substream, &info);
973 if (res < 0)
974 return res;
975 if (copy_to_user(_info, &info, sizeof(info)))
976 return -EFAULT;
977 return 0;
978}
979
980static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
981{
982 struct snd_pcm_runtime *runtime = substream->runtime;
983 if (runtime->trigger_master == NULL)
984 return;
985 if (runtime->trigger_master == substream) {
986 if (!runtime->trigger_tstamp_latched)
987 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
988 } else {
989 snd_pcm_trigger_tstamp(runtime->trigger_master);
990 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
991 }
992 runtime->trigger_master = NULL;
993}
994
995struct action_ops {
996 int (*pre_action)(struct snd_pcm_substream *substream, int state);
997 int (*do_action)(struct snd_pcm_substream *substream, int state);
998 void (*undo_action)(struct snd_pcm_substream *substream, int state);
999 void (*post_action)(struct snd_pcm_substream *substream, int state);
1000};
1001
1002
1003
1004
1005
1006
1007static int snd_pcm_action_group(const struct action_ops *ops,
1008 struct snd_pcm_substream *substream,
1009 int state, int do_lock)
1010{
1011 struct snd_pcm_substream *s = NULL;
1012 struct snd_pcm_substream *s1;
1013 int res = 0, depth = 1;
1014
1015 snd_pcm_group_for_each_entry(s, substream) {
1016 if (do_lock && s != substream) {
1017 if (s->pcm->nonatomic)
1018 mutex_lock_nested(&s->self_group.mutex, depth);
1019 else
1020 spin_lock_nested(&s->self_group.lock, depth);
1021 depth++;
1022 }
1023 res = ops->pre_action(s, state);
1024 if (res < 0)
1025 goto _unlock;
1026 }
1027 snd_pcm_group_for_each_entry(s, substream) {
1028 res = ops->do_action(s, state);
1029 if (res < 0) {
1030 if (ops->undo_action) {
1031 snd_pcm_group_for_each_entry(s1, substream) {
1032 if (s1 == s)
1033 break;
1034 ops->undo_action(s1, state);
1035 }
1036 }
1037 s = NULL;
1038 goto _unlock;
1039 }
1040 }
1041 snd_pcm_group_for_each_entry(s, substream) {
1042 ops->post_action(s, state);
1043 }
1044 _unlock:
1045 if (do_lock) {
1046
1047 snd_pcm_group_for_each_entry(s1, substream) {
1048 if (s1 != substream) {
1049 if (s1->pcm->nonatomic)
1050 mutex_unlock(&s1->self_group.mutex);
1051 else
1052 spin_unlock(&s1->self_group.lock);
1053 }
1054 if (s1 == s)
1055 break;
1056 }
1057 }
1058 return res;
1059}
1060
1061
1062
1063
1064static int snd_pcm_action_single(const struct action_ops *ops,
1065 struct snd_pcm_substream *substream,
1066 int state)
1067{
1068 int res;
1069
1070 res = ops->pre_action(substream, state);
1071 if (res < 0)
1072 return res;
1073 res = ops->do_action(substream, state);
1074 if (res == 0)
1075 ops->post_action(substream, state);
1076 else if (ops->undo_action)
1077 ops->undo_action(substream, state);
1078 return res;
1079}
1080
1081static void snd_pcm_group_assign(struct snd_pcm_substream *substream,
1082 struct snd_pcm_group *new_group)
1083{
1084 substream->group = new_group;
1085 list_move(&substream->link_list, &new_group->substreams);
1086}
1087
1088
1089
1090
1091
1092static void snd_pcm_group_unref(struct snd_pcm_group *group,
1093 struct snd_pcm_substream *substream)
1094{
1095 bool do_free;
1096
1097 if (!group)
1098 return;
1099 do_free = refcount_dec_and_test(&group->refs);
1100 snd_pcm_group_unlock(group, substream->pcm->nonatomic);
1101 if (do_free)
1102 kfree(group);
1103}
1104
1105
1106
1107
1108
1109static struct snd_pcm_group *
1110snd_pcm_stream_group_ref(struct snd_pcm_substream *substream)
1111{
1112 bool nonatomic = substream->pcm->nonatomic;
1113 struct snd_pcm_group *group;
1114 bool trylock;
1115
1116 for (;;) {
1117 if (!snd_pcm_stream_linked(substream))
1118 return NULL;
1119 group = substream->group;
1120
1121 refcount_inc(&group->refs);
1122
1123 trylock = nonatomic ? mutex_trylock(&group->mutex) :
1124 spin_trylock(&group->lock);
1125 if (trylock)
1126 break;
1127
1128
1129 snd_pcm_stream_unlock(substream);
1130 snd_pcm_group_lock(group, nonatomic);
1131 snd_pcm_stream_lock(substream);
1132
1133
1134 if (substream->group == group)
1135 break;
1136
1137 snd_pcm_group_unref(group, substream);
1138 }
1139 return group;
1140}
1141
1142
1143
1144
1145static int snd_pcm_action(const struct action_ops *ops,
1146 struct snd_pcm_substream *substream,
1147 int state)
1148{
1149 struct snd_pcm_group *group;
1150 int res;
1151
1152 group = snd_pcm_stream_group_ref(substream);
1153 if (group)
1154 res = snd_pcm_action_group(ops, substream, state, 1);
1155 else
1156 res = snd_pcm_action_single(ops, substream, state);
1157 snd_pcm_group_unref(group, substream);
1158 return res;
1159}
1160
1161
1162
1163
1164static int snd_pcm_action_lock_irq(const struct action_ops *ops,
1165 struct snd_pcm_substream *substream,
1166 int state)
1167{
1168 int res;
1169
1170 snd_pcm_stream_lock_irq(substream);
1171 res = snd_pcm_action(ops, substream, state);
1172 snd_pcm_stream_unlock_irq(substream);
1173 return res;
1174}
1175
1176
1177
1178static int snd_pcm_action_nonatomic(const struct action_ops *ops,
1179 struct snd_pcm_substream *substream,
1180 int state)
1181{
1182 int res;
1183
1184
1185 down_read(&snd_pcm_link_rwsem);
1186 if (snd_pcm_stream_linked(substream))
1187 res = snd_pcm_action_group(ops, substream, state, 0);
1188 else
1189 res = snd_pcm_action_single(ops, substream, state);
1190 up_read(&snd_pcm_link_rwsem);
1191 return res;
1192}
1193
1194
1195
1196
1197static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1198{
1199 struct snd_pcm_runtime *runtime = substream->runtime;
1200 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1201 return -EBADFD;
1202 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1203 !snd_pcm_playback_data(substream))
1204 return -EPIPE;
1205 runtime->trigger_tstamp_latched = false;
1206 runtime->trigger_master = substream;
1207 return 0;
1208}
1209
1210static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1211{
1212 if (substream->runtime->trigger_master != substream)
1213 return 0;
1214 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1215}
1216
1217static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1218{
1219 if (substream->runtime->trigger_master == substream)
1220 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1221}
1222
1223static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1224{
1225 struct snd_pcm_runtime *runtime = substream->runtime;
1226 snd_pcm_trigger_tstamp(substream);
1227 runtime->hw_ptr_jiffies = jiffies;
1228 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1229 runtime->rate;
1230 runtime->status->state = state;
1231 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1232 runtime->silence_size > 0)
1233 snd_pcm_playback_silence(substream, ULONG_MAX);
1234 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
1235}
1236
1237static const struct action_ops snd_pcm_action_start = {
1238 .pre_action = snd_pcm_pre_start,
1239 .do_action = snd_pcm_do_start,
1240 .undo_action = snd_pcm_undo_start,
1241 .post_action = snd_pcm_post_start
1242};
1243
1244
1245
1246
1247
1248
1249
1250
1251int snd_pcm_start(struct snd_pcm_substream *substream)
1252{
1253 return snd_pcm_action(&snd_pcm_action_start, substream,
1254 SNDRV_PCM_STATE_RUNNING);
1255}
1256
1257
1258static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
1259{
1260 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
1261 SNDRV_PCM_STATE_RUNNING);
1262}
1263
1264
1265
1266
1267static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1268{
1269 struct snd_pcm_runtime *runtime = substream->runtime;
1270 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1271 return -EBADFD;
1272 runtime->trigger_master = substream;
1273 return 0;
1274}
1275
1276static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1277{
1278 if (substream->runtime->trigger_master == substream &&
1279 snd_pcm_running(substream))
1280 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1281 return 0;
1282}
1283
1284static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1285{
1286 struct snd_pcm_runtime *runtime = substream->runtime;
1287 if (runtime->status->state != state) {
1288 snd_pcm_trigger_tstamp(substream);
1289 runtime->status->state = state;
1290 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
1291 }
1292 wake_up(&runtime->sleep);
1293 wake_up(&runtime->tsleep);
1294}
1295
1296static const struct action_ops snd_pcm_action_stop = {
1297 .pre_action = snd_pcm_pre_stop,
1298 .do_action = snd_pcm_do_stop,
1299 .post_action = snd_pcm_post_stop
1300};
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1312{
1313 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1314}
1315EXPORT_SYMBOL(snd_pcm_stop);
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1327{
1328 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1329 SNDRV_PCM_STATE_SETUP);
1330}
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1342{
1343 unsigned long flags;
1344
1345 snd_pcm_stream_lock_irqsave(substream, flags);
1346 if (substream->runtime && snd_pcm_running(substream))
1347 __snd_pcm_xrun(substream);
1348 snd_pcm_stream_unlock_irqrestore(substream, flags);
1349 return 0;
1350}
1351EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1352
1353
1354
1355
1356static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1357{
1358 struct snd_pcm_runtime *runtime = substream->runtime;
1359 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1360 return -ENOSYS;
1361 if (push) {
1362 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1363 return -EBADFD;
1364 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1365 return -EBADFD;
1366 runtime->trigger_master = substream;
1367 return 0;
1368}
1369
1370static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1371{
1372 if (substream->runtime->trigger_master != substream)
1373 return 0;
1374
1375
1376 if (push)
1377 snd_pcm_update_hw_ptr(substream);
1378
1379
1380
1381
1382 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1383 return substream->ops->trigger(substream,
1384 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1385 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1386}
1387
1388static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1389{
1390 if (substream->runtime->trigger_master == substream)
1391 substream->ops->trigger(substream,
1392 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1393 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1394}
1395
1396static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1397{
1398 struct snd_pcm_runtime *runtime = substream->runtime;
1399 snd_pcm_trigger_tstamp(substream);
1400 if (push) {
1401 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1402 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
1403 wake_up(&runtime->sleep);
1404 wake_up(&runtime->tsleep);
1405 } else {
1406 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1407 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
1408 }
1409}
1410
1411static const struct action_ops snd_pcm_action_pause = {
1412 .pre_action = snd_pcm_pre_pause,
1413 .do_action = snd_pcm_do_pause,
1414 .undo_action = snd_pcm_undo_pause,
1415 .post_action = snd_pcm_post_pause
1416};
1417
1418
1419
1420
1421static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1422{
1423 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1424}
1425
1426#ifdef CONFIG_PM
1427
1428
1429static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1430{
1431 struct snd_pcm_runtime *runtime = substream->runtime;
1432 switch (runtime->status->state) {
1433 case SNDRV_PCM_STATE_SUSPENDED:
1434 return -EBUSY;
1435
1436 case SNDRV_PCM_STATE_OPEN:
1437 case SNDRV_PCM_STATE_SETUP:
1438 case SNDRV_PCM_STATE_DISCONNECTED:
1439 return -EBUSY;
1440 }
1441 runtime->trigger_master = substream;
1442 return 0;
1443}
1444
1445static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1446{
1447 struct snd_pcm_runtime *runtime = substream->runtime;
1448 if (runtime->trigger_master != substream)
1449 return 0;
1450 if (! snd_pcm_running(substream))
1451 return 0;
1452 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1453 return 0;
1454}
1455
1456static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1457{
1458 struct snd_pcm_runtime *runtime = substream->runtime;
1459 snd_pcm_trigger_tstamp(substream);
1460 runtime->status->suspended_state = runtime->status->state;
1461 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1462 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
1463 wake_up(&runtime->sleep);
1464 wake_up(&runtime->tsleep);
1465}
1466
1467static const struct action_ops snd_pcm_action_suspend = {
1468 .pre_action = snd_pcm_pre_suspend,
1469 .do_action = snd_pcm_do_suspend,
1470 .post_action = snd_pcm_post_suspend
1471};
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481static int snd_pcm_suspend(struct snd_pcm_substream *substream)
1482{
1483 int err;
1484 unsigned long flags;
1485
1486 snd_pcm_stream_lock_irqsave(substream, flags);
1487 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1488 snd_pcm_stream_unlock_irqrestore(substream, flags);
1489 return err;
1490}
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500int snd_pcm_suspend_all(struct snd_pcm *pcm)
1501{
1502 struct snd_pcm_substream *substream;
1503 int stream, err = 0;
1504
1505 if (! pcm)
1506 return 0;
1507
1508 for (stream = 0; stream < 2; stream++) {
1509 for (substream = pcm->streams[stream].substream;
1510 substream; substream = substream->next) {
1511
1512 if (substream->runtime == NULL)
1513 continue;
1514
1515
1516
1517
1518
1519 if (!substream->ops)
1520 continue;
1521
1522 err = snd_pcm_suspend(substream);
1523 if (err < 0 && err != -EBUSY)
1524 return err;
1525 }
1526 }
1527 return 0;
1528}
1529EXPORT_SYMBOL(snd_pcm_suspend_all);
1530
1531
1532
1533static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1534{
1535 struct snd_pcm_runtime *runtime = substream->runtime;
1536 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1537 return -ENOSYS;
1538 runtime->trigger_master = substream;
1539 return 0;
1540}
1541
1542static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1543{
1544 struct snd_pcm_runtime *runtime = substream->runtime;
1545 if (runtime->trigger_master != substream)
1546 return 0;
1547
1548 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1549 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1550 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1551 return 0;
1552 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1553}
1554
1555static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1556{
1557 if (substream->runtime->trigger_master == substream &&
1558 snd_pcm_running(substream))
1559 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1560}
1561
1562static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1563{
1564 struct snd_pcm_runtime *runtime = substream->runtime;
1565 snd_pcm_trigger_tstamp(substream);
1566 runtime->status->state = runtime->status->suspended_state;
1567 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
1568}
1569
1570static const struct action_ops snd_pcm_action_resume = {
1571 .pre_action = snd_pcm_pre_resume,
1572 .do_action = snd_pcm_do_resume,
1573 .undo_action = snd_pcm_undo_resume,
1574 .post_action = snd_pcm_post_resume
1575};
1576
1577static int snd_pcm_resume(struct snd_pcm_substream *substream)
1578{
1579 return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1580}
1581
1582#else
1583
1584static int snd_pcm_resume(struct snd_pcm_substream *substream)
1585{
1586 return -ENOSYS;
1587}
1588
1589#endif
1590
1591
1592
1593
1594
1595
1596static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1597{
1598 struct snd_pcm_runtime *runtime = substream->runtime;
1599 int result;
1600
1601 snd_pcm_stream_lock_irq(substream);
1602 switch (runtime->status->state) {
1603 case SNDRV_PCM_STATE_XRUN:
1604 result = 0;
1605 break;
1606 case SNDRV_PCM_STATE_RUNNING:
1607 __snd_pcm_xrun(substream);
1608 result = 0;
1609 break;
1610 default:
1611 result = -EBADFD;
1612 }
1613 snd_pcm_stream_unlock_irq(substream);
1614 return result;
1615}
1616
1617
1618
1619
1620static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1621{
1622 struct snd_pcm_runtime *runtime = substream->runtime;
1623 switch (runtime->status->state) {
1624 case SNDRV_PCM_STATE_RUNNING:
1625 case SNDRV_PCM_STATE_PREPARED:
1626 case SNDRV_PCM_STATE_PAUSED:
1627 case SNDRV_PCM_STATE_SUSPENDED:
1628 return 0;
1629 default:
1630 return -EBADFD;
1631 }
1632}
1633
1634static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1635{
1636 struct snd_pcm_runtime *runtime = substream->runtime;
1637 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1638 if (err < 0)
1639 return err;
1640 runtime->hw_ptr_base = 0;
1641 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1642 runtime->status->hw_ptr % runtime->period_size;
1643 runtime->silence_start = runtime->status->hw_ptr;
1644 runtime->silence_filled = 0;
1645 return 0;
1646}
1647
1648static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1649{
1650 struct snd_pcm_runtime *runtime = substream->runtime;
1651 runtime->control->appl_ptr = runtime->status->hw_ptr;
1652 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1653 runtime->silence_size > 0)
1654 snd_pcm_playback_silence(substream, ULONG_MAX);
1655}
1656
1657static const struct action_ops snd_pcm_action_reset = {
1658 .pre_action = snd_pcm_pre_reset,
1659 .do_action = snd_pcm_do_reset,
1660 .post_action = snd_pcm_post_reset
1661};
1662
1663static int snd_pcm_reset(struct snd_pcm_substream *substream)
1664{
1665 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1666}
1667
1668
1669
1670
1671
1672static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1673 int f_flags)
1674{
1675 struct snd_pcm_runtime *runtime = substream->runtime;
1676 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1677 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1678 return -EBADFD;
1679 if (snd_pcm_running(substream))
1680 return -EBUSY;
1681 substream->f_flags = f_flags;
1682 return 0;
1683}
1684
1685static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1686{
1687 int err;
1688 err = substream->ops->prepare(substream);
1689 if (err < 0)
1690 return err;
1691 return snd_pcm_do_reset(substream, 0);
1692}
1693
1694static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1695{
1696 struct snd_pcm_runtime *runtime = substream->runtime;
1697 runtime->control->appl_ptr = runtime->status->hw_ptr;
1698 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1699}
1700
1701static const struct action_ops snd_pcm_action_prepare = {
1702 .pre_action = snd_pcm_pre_prepare,
1703 .do_action = snd_pcm_do_prepare,
1704 .post_action = snd_pcm_post_prepare
1705};
1706
1707
1708
1709
1710
1711
1712
1713
1714static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1715 struct file *file)
1716{
1717 int f_flags;
1718
1719 if (file)
1720 f_flags = file->f_flags;
1721 else
1722 f_flags = substream->f_flags;
1723
1724 snd_pcm_stream_lock_irq(substream);
1725 switch (substream->runtime->status->state) {
1726 case SNDRV_PCM_STATE_PAUSED:
1727 snd_pcm_pause(substream, 0);
1728
1729 case SNDRV_PCM_STATE_SUSPENDED:
1730 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1731 break;
1732 }
1733 snd_pcm_stream_unlock_irq(substream);
1734
1735 return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1736 substream, f_flags);
1737}
1738
1739
1740
1741
1742
1743static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1744{
1745 struct snd_pcm_runtime *runtime = substream->runtime;
1746 switch (runtime->status->state) {
1747 case SNDRV_PCM_STATE_OPEN:
1748 case SNDRV_PCM_STATE_DISCONNECTED:
1749 case SNDRV_PCM_STATE_SUSPENDED:
1750 return -EBADFD;
1751 }
1752 runtime->trigger_master = substream;
1753 return 0;
1754}
1755
1756static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1757{
1758 struct snd_pcm_runtime *runtime = substream->runtime;
1759 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1760 switch (runtime->status->state) {
1761 case SNDRV_PCM_STATE_PREPARED:
1762
1763 if (! snd_pcm_playback_empty(substream)) {
1764 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1765 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1766 } else {
1767 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1768 }
1769 break;
1770 case SNDRV_PCM_STATE_RUNNING:
1771 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1772 break;
1773 case SNDRV_PCM_STATE_XRUN:
1774 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1775 break;
1776 default:
1777 break;
1778 }
1779 } else {
1780
1781 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1782 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1783 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1784 snd_pcm_do_stop(substream, new_state);
1785 snd_pcm_post_stop(substream, new_state);
1786 }
1787 }
1788
1789 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1790 runtime->trigger_master == substream &&
1791 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1792 return substream->ops->trigger(substream,
1793 SNDRV_PCM_TRIGGER_DRAIN);
1794
1795 return 0;
1796}
1797
1798static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1799{
1800}
1801
1802static const struct action_ops snd_pcm_action_drain_init = {
1803 .pre_action = snd_pcm_pre_drain_init,
1804 .do_action = snd_pcm_do_drain_init,
1805 .post_action = snd_pcm_post_drain_init
1806};
1807
1808
1809
1810
1811
1812
1813
1814
1815static int snd_pcm_drain(struct snd_pcm_substream *substream,
1816 struct file *file)
1817{
1818 struct snd_card *card;
1819 struct snd_pcm_runtime *runtime;
1820 struct snd_pcm_substream *s;
1821 struct snd_pcm_group *group;
1822 wait_queue_entry_t wait;
1823 int result = 0;
1824 int nonblock = 0;
1825
1826 card = substream->pcm->card;
1827 runtime = substream->runtime;
1828
1829 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1830 return -EBADFD;
1831
1832 if (file) {
1833 if (file->f_flags & O_NONBLOCK)
1834 nonblock = 1;
1835 } else if (substream->f_flags & O_NONBLOCK)
1836 nonblock = 1;
1837
1838 snd_pcm_stream_lock_irq(substream);
1839
1840 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1841 snd_pcm_pause(substream, 0);
1842
1843
1844 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1845 if (result < 0)
1846 goto unlock;
1847
1848 if (nonblock) {
1849 result = -EAGAIN;
1850 goto unlock;
1851 }
1852
1853 for (;;) {
1854 long tout;
1855 struct snd_pcm_runtime *to_check;
1856 if (signal_pending(current)) {
1857 result = -ERESTARTSYS;
1858 break;
1859 }
1860
1861 to_check = NULL;
1862 group = snd_pcm_stream_group_ref(substream);
1863 snd_pcm_group_for_each_entry(s, substream) {
1864 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1865 continue;
1866 runtime = s->runtime;
1867 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1868 to_check = runtime;
1869 break;
1870 }
1871 }
1872 snd_pcm_group_unref(group, substream);
1873 if (!to_check)
1874 break;
1875 init_waitqueue_entry(&wait, current);
1876 set_current_state(TASK_INTERRUPTIBLE);
1877 add_wait_queue(&to_check->sleep, &wait);
1878 snd_pcm_stream_unlock_irq(substream);
1879 if (runtime->no_period_wakeup)
1880 tout = MAX_SCHEDULE_TIMEOUT;
1881 else {
1882 tout = 10;
1883 if (runtime->rate) {
1884 long t = runtime->period_size * 2 / runtime->rate;
1885 tout = max(t, tout);
1886 }
1887 tout = msecs_to_jiffies(tout * 1000);
1888 }
1889 tout = schedule_timeout(tout);
1890
1891 snd_pcm_stream_lock_irq(substream);
1892 group = snd_pcm_stream_group_ref(substream);
1893 snd_pcm_group_for_each_entry(s, substream) {
1894 if (s->runtime == to_check) {
1895 remove_wait_queue(&to_check->sleep, &wait);
1896 break;
1897 }
1898 }
1899 snd_pcm_group_unref(group, substream);
1900
1901 if (card->shutdown) {
1902 result = -ENODEV;
1903 break;
1904 }
1905 if (tout == 0) {
1906 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1907 result = -ESTRPIPE;
1908 else {
1909 dev_dbg(substream->pcm->card->dev,
1910 "playback drain error (DMA or IRQ trouble?)\n");
1911 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1912 result = -EIO;
1913 }
1914 break;
1915 }
1916 }
1917
1918 unlock:
1919 snd_pcm_stream_unlock_irq(substream);
1920
1921 return result;
1922}
1923
1924
1925
1926
1927
1928
1929static int snd_pcm_drop(struct snd_pcm_substream *substream)
1930{
1931 struct snd_pcm_runtime *runtime;
1932 int result = 0;
1933
1934 if (PCM_RUNTIME_CHECK(substream))
1935 return -ENXIO;
1936 runtime = substream->runtime;
1937
1938 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1939 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1940 return -EBADFD;
1941
1942 snd_pcm_stream_lock_irq(substream);
1943
1944 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1945 snd_pcm_pause(substream, 0);
1946
1947 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1948
1949 snd_pcm_stream_unlock_irq(substream);
1950
1951 return result;
1952}
1953
1954
1955static bool is_pcm_file(struct file *file)
1956{
1957 struct inode *inode = file_inode(file);
1958 struct snd_pcm *pcm;
1959 unsigned int minor;
1960
1961 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1962 return false;
1963 minor = iminor(inode);
1964 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
1965 if (!pcm)
1966 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1967 if (!pcm)
1968 return false;
1969 snd_card_unref(pcm->card);
1970 return true;
1971}
1972
1973
1974
1975
1976static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1977{
1978 int res = 0;
1979 struct snd_pcm_file *pcm_file;
1980 struct snd_pcm_substream *substream1;
1981 struct snd_pcm_group *group, *target_group;
1982 bool nonatomic = substream->pcm->nonatomic;
1983 struct fd f = fdget(fd);
1984
1985 if (!f.file)
1986 return -EBADFD;
1987 if (!is_pcm_file(f.file)) {
1988 res = -EBADFD;
1989 goto _badf;
1990 }
1991 pcm_file = f.file->private_data;
1992 substream1 = pcm_file->substream;
1993 group = kzalloc(sizeof(*group), GFP_KERNEL);
1994 if (!group) {
1995 res = -ENOMEM;
1996 goto _nolock;
1997 }
1998 snd_pcm_group_init(group);
1999
2000 down_write(&snd_pcm_link_rwsem);
2001 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
2002 substream->runtime->status->state != substream1->runtime->status->state ||
2003 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
2004 res = -EBADFD;
2005 goto _end;
2006 }
2007 if (snd_pcm_stream_linked(substream1)) {
2008 res = -EALREADY;
2009 goto _end;
2010 }
2011
2012 snd_pcm_stream_lock_irq(substream);
2013 if (!snd_pcm_stream_linked(substream)) {
2014 snd_pcm_group_assign(substream, group);
2015 group = NULL;
2016 }
2017 target_group = substream->group;
2018 snd_pcm_stream_unlock_irq(substream);
2019
2020 snd_pcm_group_lock_irq(target_group, nonatomic);
2021 snd_pcm_stream_lock(substream1);
2022 snd_pcm_group_assign(substream1, target_group);
2023 refcount_inc(&target_group->refs);
2024 snd_pcm_stream_unlock(substream1);
2025 snd_pcm_group_unlock_irq(target_group, nonatomic);
2026 _end:
2027 up_write(&snd_pcm_link_rwsem);
2028 _nolock:
2029 kfree(group);
2030 _badf:
2031 fdput(f);
2032 return res;
2033}
2034
2035static void relink_to_local(struct snd_pcm_substream *substream)
2036{
2037 snd_pcm_stream_lock(substream);
2038 snd_pcm_group_assign(substream, &substream->self_group);
2039 snd_pcm_stream_unlock(substream);
2040}
2041
2042static int snd_pcm_unlink(struct snd_pcm_substream *substream)
2043{
2044 struct snd_pcm_group *group;
2045 bool nonatomic = substream->pcm->nonatomic;
2046 bool do_free = false;
2047 int res = 0;
2048
2049 down_write(&snd_pcm_link_rwsem);
2050
2051 if (!snd_pcm_stream_linked(substream)) {
2052 res = -EALREADY;
2053 goto _end;
2054 }
2055
2056 group = substream->group;
2057 snd_pcm_group_lock_irq(group, nonatomic);
2058
2059 relink_to_local(substream);
2060 refcount_dec(&group->refs);
2061
2062
2063 if (list_is_singular(&group->substreams)) {
2064 relink_to_local(list_first_entry(&group->substreams,
2065 struct snd_pcm_substream,
2066 link_list));
2067 do_free = refcount_dec_and_test(&group->refs);
2068 }
2069
2070 snd_pcm_group_unlock_irq(group, nonatomic);
2071 if (do_free)
2072 kfree(group);
2073
2074 _end:
2075 up_write(&snd_pcm_link_rwsem);
2076 return res;
2077}
2078
2079
2080
2081
2082static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
2083 struct snd_pcm_hw_rule *rule)
2084{
2085 struct snd_interval t;
2086 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
2087 hw_param_interval_c(params, rule->deps[1]), &t);
2088 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2089}
2090
2091static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
2092 struct snd_pcm_hw_rule *rule)
2093{
2094 struct snd_interval t;
2095 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
2096 hw_param_interval_c(params, rule->deps[1]), &t);
2097 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2098}
2099
2100static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
2101 struct snd_pcm_hw_rule *rule)
2102{
2103 struct snd_interval t;
2104 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
2105 hw_param_interval_c(params, rule->deps[1]),
2106 (unsigned long) rule->private, &t);
2107 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2108}
2109
2110static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
2111 struct snd_pcm_hw_rule *rule)
2112{
2113 struct snd_interval t;
2114 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
2115 (unsigned long) rule->private,
2116 hw_param_interval_c(params, rule->deps[1]), &t);
2117 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2118}
2119
2120static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
2121 struct snd_pcm_hw_rule *rule)
2122{
2123 unsigned int k;
2124 const struct snd_interval *i =
2125 hw_param_interval_c(params, rule->deps[0]);
2126 struct snd_mask m;
2127 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
2128 snd_mask_any(&m);
2129 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2130 int bits;
2131 if (! snd_mask_test(mask, k))
2132 continue;
2133 bits = snd_pcm_format_physical_width(k);
2134 if (bits <= 0)
2135 continue;
2136 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
2137 snd_mask_reset(&m, k);
2138 }
2139 return snd_mask_refine(mask, &m);
2140}
2141
2142static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
2143 struct snd_pcm_hw_rule *rule)
2144{
2145 struct snd_interval t;
2146 unsigned int k;
2147 t.min = UINT_MAX;
2148 t.max = 0;
2149 t.openmin = 0;
2150 t.openmax = 0;
2151 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2152 int bits;
2153 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
2154 continue;
2155 bits = snd_pcm_format_physical_width(k);
2156 if (bits <= 0)
2157 continue;
2158 if (t.min > (unsigned)bits)
2159 t.min = bits;
2160 if (t.max < (unsigned)bits)
2161 t.max = bits;
2162 }
2163 t.integer = 1;
2164 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2165}
2166
2167#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
2168#error "Change this table"
2169#endif
2170
2171static const unsigned int rates[] = {
2172 5512, 8000, 11025, 16000, 22050, 32000, 44100,
2173 48000, 64000, 88200, 96000, 176400, 192000
2174};
2175
2176const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
2177 .count = ARRAY_SIZE(rates),
2178 .list = rates,
2179};
2180
2181static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
2182 struct snd_pcm_hw_rule *rule)
2183{
2184 struct snd_pcm_hardware *hw = rule->private;
2185 return snd_interval_list(hw_param_interval(params, rule->var),
2186 snd_pcm_known_rates.count,
2187 snd_pcm_known_rates.list, hw->rates);
2188}
2189
2190static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2191 struct snd_pcm_hw_rule *rule)
2192{
2193 struct snd_interval t;
2194 struct snd_pcm_substream *substream = rule->private;
2195 t.min = 0;
2196 t.max = substream->buffer_bytes_max;
2197 t.openmin = 0;
2198 t.openmax = 0;
2199 t.integer = 1;
2200 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2201}
2202
2203int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
2204{
2205 struct snd_pcm_runtime *runtime = substream->runtime;
2206 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
2207 int k, err;
2208
2209 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2210 snd_mask_any(constrs_mask(constrs, k));
2211 }
2212
2213 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2214 snd_interval_any(constrs_interval(constrs, k));
2215 }
2216
2217 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2218 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2219 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2220 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2221 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2222
2223 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2224 snd_pcm_hw_rule_format, NULL,
2225 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2226 if (err < 0)
2227 return err;
2228 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2229 snd_pcm_hw_rule_sample_bits, NULL,
2230 SNDRV_PCM_HW_PARAM_FORMAT,
2231 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2232 if (err < 0)
2233 return err;
2234 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2235 snd_pcm_hw_rule_div, NULL,
2236 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2237 if (err < 0)
2238 return err;
2239 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2240 snd_pcm_hw_rule_mul, NULL,
2241 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2242 if (err < 0)
2243 return err;
2244 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2245 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2246 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2247 if (err < 0)
2248 return err;
2249 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2250 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2251 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2252 if (err < 0)
2253 return err;
2254 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2255 snd_pcm_hw_rule_div, NULL,
2256 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2257 if (err < 0)
2258 return err;
2259 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2260 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2261 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2262 if (err < 0)
2263 return err;
2264 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2265 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2266 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2267 if (err < 0)
2268 return err;
2269 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2270 snd_pcm_hw_rule_div, NULL,
2271 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2272 if (err < 0)
2273 return err;
2274 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2275 snd_pcm_hw_rule_div, NULL,
2276 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2277 if (err < 0)
2278 return err;
2279 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2280 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2281 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2282 if (err < 0)
2283 return err;
2284 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2285 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2286 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2287 if (err < 0)
2288 return err;
2289 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2290 snd_pcm_hw_rule_mul, NULL,
2291 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2292 if (err < 0)
2293 return err;
2294 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2295 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2296 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2297 if (err < 0)
2298 return err;
2299 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2300 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2301 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2302 if (err < 0)
2303 return err;
2304 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2305 snd_pcm_hw_rule_muldivk, (void*) 8,
2306 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2307 if (err < 0)
2308 return err;
2309 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2310 snd_pcm_hw_rule_muldivk, (void*) 8,
2311 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2312 if (err < 0)
2313 return err;
2314 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2315 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2316 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2317 if (err < 0)
2318 return err;
2319 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2320 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2321 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2322 if (err < 0)
2323 return err;
2324 return 0;
2325}
2326
2327int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2328{
2329 struct snd_pcm_runtime *runtime = substream->runtime;
2330 struct snd_pcm_hardware *hw = &runtime->hw;
2331 int err;
2332 unsigned int mask = 0;
2333
2334 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2335 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2336 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2337 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
2338 if (hw_support_mmap(substream)) {
2339 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2340 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2341 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2342 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2343 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2344 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2345 }
2346 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2347 if (err < 0)
2348 return err;
2349
2350 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2351 if (err < 0)
2352 return err;
2353
2354 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
2355 if (err < 0)
2356 return err;
2357
2358 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2359 hw->channels_min, hw->channels_max);
2360 if (err < 0)
2361 return err;
2362
2363 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2364 hw->rate_min, hw->rate_max);
2365 if (err < 0)
2366 return err;
2367
2368 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2369 hw->period_bytes_min, hw->period_bytes_max);
2370 if (err < 0)
2371 return err;
2372
2373 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2374 hw->periods_min, hw->periods_max);
2375 if (err < 0)
2376 return err;
2377
2378 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2379 hw->period_bytes_min, hw->buffer_bytes_max);
2380 if (err < 0)
2381 return err;
2382
2383 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2384 snd_pcm_hw_rule_buffer_bytes_max, substream,
2385 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2386 if (err < 0)
2387 return err;
2388
2389
2390 if (runtime->dma_bytes) {
2391 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2392 if (err < 0)
2393 return err;
2394 }
2395
2396 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2397 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2398 snd_pcm_hw_rule_rate, hw,
2399 SNDRV_PCM_HW_PARAM_RATE, -1);
2400 if (err < 0)
2401 return err;
2402 }
2403
2404
2405 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2406
2407 return 0;
2408}
2409
2410static void pcm_release_private(struct snd_pcm_substream *substream)
2411{
2412 if (snd_pcm_stream_linked(substream))
2413 snd_pcm_unlink(substream);
2414}
2415
2416void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2417{
2418 substream->ref_count--;
2419 if (substream->ref_count > 0)
2420 return;
2421
2422 snd_pcm_drop(substream);
2423 if (substream->hw_opened) {
2424 if (substream->ops->hw_free &&
2425 substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
2426 substream->ops->hw_free(substream);
2427 substream->ops->close(substream);
2428 substream->hw_opened = 0;
2429 }
2430 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2431 pm_qos_remove_request(&substream->latency_pm_qos_req);
2432 if (substream->pcm_release) {
2433 substream->pcm_release(substream);
2434 substream->pcm_release = NULL;
2435 }
2436 snd_pcm_detach_substream(substream);
2437}
2438EXPORT_SYMBOL(snd_pcm_release_substream);
2439
2440int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2441 struct file *file,
2442 struct snd_pcm_substream **rsubstream)
2443{
2444 struct snd_pcm_substream *substream;
2445 int err;
2446
2447 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2448 if (err < 0)
2449 return err;
2450 if (substream->ref_count > 1) {
2451 *rsubstream = substream;
2452 return 0;
2453 }
2454
2455 err = snd_pcm_hw_constraints_init(substream);
2456 if (err < 0) {
2457 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2458 goto error;
2459 }
2460
2461 if ((err = substream->ops->open(substream)) < 0)
2462 goto error;
2463
2464 substream->hw_opened = 1;
2465
2466 err = snd_pcm_hw_constraints_complete(substream);
2467 if (err < 0) {
2468 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2469 goto error;
2470 }
2471
2472 *rsubstream = substream;
2473 return 0;
2474
2475 error:
2476 snd_pcm_release_substream(substream);
2477 return err;
2478}
2479EXPORT_SYMBOL(snd_pcm_open_substream);
2480
2481static int snd_pcm_open_file(struct file *file,
2482 struct snd_pcm *pcm,
2483 int stream)
2484{
2485 struct snd_pcm_file *pcm_file;
2486 struct snd_pcm_substream *substream;
2487 int err;
2488
2489 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2490 if (err < 0)
2491 return err;
2492
2493 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2494 if (pcm_file == NULL) {
2495 snd_pcm_release_substream(substream);
2496 return -ENOMEM;
2497 }
2498 pcm_file->substream = substream;
2499 if (substream->ref_count == 1)
2500 substream->pcm_release = pcm_release_private;
2501 file->private_data = pcm_file;
2502
2503 return 0;
2504}
2505
2506static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2507{
2508 struct snd_pcm *pcm;
2509 int err = nonseekable_open(inode, file);
2510 if (err < 0)
2511 return err;
2512 pcm = snd_lookup_minor_data(iminor(inode),
2513 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2514 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2515 if (pcm)
2516 snd_card_unref(pcm->card);
2517 return err;
2518}
2519
2520static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2521{
2522 struct snd_pcm *pcm;
2523 int err = nonseekable_open(inode, file);
2524 if (err < 0)
2525 return err;
2526 pcm = snd_lookup_minor_data(iminor(inode),
2527 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2528 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2529 if (pcm)
2530 snd_card_unref(pcm->card);
2531 return err;
2532}
2533
2534static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2535{
2536 int err;
2537 wait_queue_entry_t wait;
2538
2539 if (pcm == NULL) {
2540 err = -ENODEV;
2541 goto __error1;
2542 }
2543 err = snd_card_file_add(pcm->card, file);
2544 if (err < 0)
2545 goto __error1;
2546 if (!try_module_get(pcm->card->module)) {
2547 err = -EFAULT;
2548 goto __error2;
2549 }
2550 init_waitqueue_entry(&wait, current);
2551 add_wait_queue(&pcm->open_wait, &wait);
2552 mutex_lock(&pcm->open_mutex);
2553 while (1) {
2554 err = snd_pcm_open_file(file, pcm, stream);
2555 if (err >= 0)
2556 break;
2557 if (err == -EAGAIN) {
2558 if (file->f_flags & O_NONBLOCK) {
2559 err = -EBUSY;
2560 break;
2561 }
2562 } else
2563 break;
2564 set_current_state(TASK_INTERRUPTIBLE);
2565 mutex_unlock(&pcm->open_mutex);
2566 schedule();
2567 mutex_lock(&pcm->open_mutex);
2568 if (pcm->card->shutdown) {
2569 err = -ENODEV;
2570 break;
2571 }
2572 if (signal_pending(current)) {
2573 err = -ERESTARTSYS;
2574 break;
2575 }
2576 }
2577 remove_wait_queue(&pcm->open_wait, &wait);
2578 mutex_unlock(&pcm->open_mutex);
2579 if (err < 0)
2580 goto __error;
2581 return err;
2582
2583 __error:
2584 module_put(pcm->card->module);
2585 __error2:
2586 snd_card_file_remove(pcm->card, file);
2587 __error1:
2588 return err;
2589}
2590
2591static int snd_pcm_release(struct inode *inode, struct file *file)
2592{
2593 struct snd_pcm *pcm;
2594 struct snd_pcm_substream *substream;
2595 struct snd_pcm_file *pcm_file;
2596
2597 pcm_file = file->private_data;
2598 substream = pcm_file->substream;
2599 if (snd_BUG_ON(!substream))
2600 return -ENXIO;
2601 pcm = substream->pcm;
2602 mutex_lock(&pcm->open_mutex);
2603 snd_pcm_release_substream(substream);
2604 kfree(pcm_file);
2605 mutex_unlock(&pcm->open_mutex);
2606 wake_up(&pcm->open_wait);
2607 module_put(pcm->card->module);
2608 snd_card_file_remove(pcm->card, file);
2609 return 0;
2610}
2611
2612
2613
2614
2615static int do_pcm_hwsync(struct snd_pcm_substream *substream)
2616{
2617 switch (substream->runtime->status->state) {
2618 case SNDRV_PCM_STATE_DRAINING:
2619 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2620 return -EBADFD;
2621
2622 case SNDRV_PCM_STATE_RUNNING:
2623 return snd_pcm_update_hw_ptr(substream);
2624 case SNDRV_PCM_STATE_PREPARED:
2625 case SNDRV_PCM_STATE_PAUSED:
2626 return 0;
2627 case SNDRV_PCM_STATE_SUSPENDED:
2628 return -ESTRPIPE;
2629 case SNDRV_PCM_STATE_XRUN:
2630 return -EPIPE;
2631 default:
2632 return -EBADFD;
2633 }
2634}
2635
2636
2637static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
2638 snd_pcm_uframes_t frames,
2639 snd_pcm_sframes_t avail)
2640{
2641 struct snd_pcm_runtime *runtime = substream->runtime;
2642 snd_pcm_sframes_t appl_ptr;
2643 int ret;
2644
2645 if (avail <= 0)
2646 return 0;
2647 if (frames > (snd_pcm_uframes_t)avail)
2648 frames = avail;
2649 appl_ptr = runtime->control->appl_ptr + frames;
2650 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2651 appl_ptr -= runtime->boundary;
2652 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
2653 return ret < 0 ? ret : frames;
2654}
2655
2656
2657static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
2658 snd_pcm_uframes_t frames,
2659 snd_pcm_sframes_t avail)
2660{
2661 struct snd_pcm_runtime *runtime = substream->runtime;
2662 snd_pcm_sframes_t appl_ptr;
2663 int ret;
2664
2665 if (avail <= 0)
2666 return 0;
2667 if (frames > (snd_pcm_uframes_t)avail)
2668 frames = avail;
2669 appl_ptr = runtime->control->appl_ptr - frames;
2670 if (appl_ptr < 0)
2671 appl_ptr += runtime->boundary;
2672 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
2673
2674
2675
2676
2677
2678 return ret < 0 ? 0 : frames;
2679}
2680
2681static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream,
2682 snd_pcm_uframes_t frames)
2683{
2684 snd_pcm_sframes_t ret;
2685
2686 if (frames == 0)
2687 return 0;
2688
2689 snd_pcm_stream_lock_irq(substream);
2690 ret = do_pcm_hwsync(substream);
2691 if (!ret)
2692 ret = rewind_appl_ptr(substream, frames,
2693 snd_pcm_hw_avail(substream));
2694 snd_pcm_stream_unlock_irq(substream);
2695 return ret;
2696}
2697
2698static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream,
2699 snd_pcm_uframes_t frames)
2700{
2701 snd_pcm_sframes_t ret;
2702
2703 if (frames == 0)
2704 return 0;
2705
2706 snd_pcm_stream_lock_irq(substream);
2707 ret = do_pcm_hwsync(substream);
2708 if (!ret)
2709 ret = forward_appl_ptr(substream, frames,
2710 snd_pcm_avail(substream));
2711 snd_pcm_stream_unlock_irq(substream);
2712 return ret;
2713}
2714
2715static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2716{
2717 int err;
2718
2719 snd_pcm_stream_lock_irq(substream);
2720 err = do_pcm_hwsync(substream);
2721 snd_pcm_stream_unlock_irq(substream);
2722 return err;
2723}
2724
2725static int snd_pcm_delay(struct snd_pcm_substream *substream,
2726 snd_pcm_sframes_t *delay)
2727{
2728 int err;
2729 snd_pcm_sframes_t n = 0;
2730
2731 snd_pcm_stream_lock_irq(substream);
2732 err = do_pcm_hwsync(substream);
2733 if (!err)
2734 n = snd_pcm_calc_delay(substream);
2735 snd_pcm_stream_unlock_irq(substream);
2736 if (!err)
2737 *delay = n;
2738 return err;
2739}
2740
2741static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2742 struct snd_pcm_sync_ptr __user *_sync_ptr)
2743{
2744 struct snd_pcm_runtime *runtime = substream->runtime;
2745 struct snd_pcm_sync_ptr sync_ptr;
2746 volatile struct snd_pcm_mmap_status *status;
2747 volatile struct snd_pcm_mmap_control *control;
2748 int err;
2749
2750 memset(&sync_ptr, 0, sizeof(sync_ptr));
2751 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2752 return -EFAULT;
2753 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2754 return -EFAULT;
2755 status = runtime->status;
2756 control = runtime->control;
2757 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2758 err = snd_pcm_hwsync(substream);
2759 if (err < 0)
2760 return err;
2761 }
2762 snd_pcm_stream_lock_irq(substream);
2763 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
2764 err = pcm_lib_apply_appl_ptr(substream,
2765 sync_ptr.c.control.appl_ptr);
2766 if (err < 0) {
2767 snd_pcm_stream_unlock_irq(substream);
2768 return err;
2769 }
2770 } else {
2771 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2772 }
2773 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2774 control->avail_min = sync_ptr.c.control.avail_min;
2775 else
2776 sync_ptr.c.control.avail_min = control->avail_min;
2777 sync_ptr.s.status.state = status->state;
2778 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2779 sync_ptr.s.status.tstamp = status->tstamp;
2780 sync_ptr.s.status.suspended_state = status->suspended_state;
2781 sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
2782 snd_pcm_stream_unlock_irq(substream);
2783 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2784 return -EFAULT;
2785 return 0;
2786}
2787
2788static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2789{
2790 struct snd_pcm_runtime *runtime = substream->runtime;
2791 int arg;
2792
2793 if (get_user(arg, _arg))
2794 return -EFAULT;
2795 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2796 return -EINVAL;
2797 runtime->tstamp_type = arg;
2798 return 0;
2799}
2800
2801static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream,
2802 struct snd_xferi __user *_xferi)
2803{
2804 struct snd_xferi xferi;
2805 struct snd_pcm_runtime *runtime = substream->runtime;
2806 snd_pcm_sframes_t result;
2807
2808 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2809 return -EBADFD;
2810 if (put_user(0, &_xferi->result))
2811 return -EFAULT;
2812 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2813 return -EFAULT;
2814 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2815 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2816 else
2817 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2818 __put_user(result, &_xferi->result);
2819 return result < 0 ? result : 0;
2820}
2821
2822static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
2823 struct snd_xfern __user *_xfern)
2824{
2825 struct snd_xfern xfern;
2826 struct snd_pcm_runtime *runtime = substream->runtime;
2827 void *bufs;
2828 snd_pcm_sframes_t result;
2829
2830 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2831 return -EBADFD;
2832 if (runtime->channels > 128)
2833 return -EINVAL;
2834 if (put_user(0, &_xfern->result))
2835 return -EFAULT;
2836 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2837 return -EFAULT;
2838
2839 bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
2840 if (IS_ERR(bufs))
2841 return PTR_ERR(bufs);
2842 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2843 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2844 else
2845 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2846 kfree(bufs);
2847 __put_user(result, &_xfern->result);
2848 return result < 0 ? result : 0;
2849}
2850
2851static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream,
2852 snd_pcm_uframes_t __user *_frames)
2853{
2854 snd_pcm_uframes_t frames;
2855 snd_pcm_sframes_t result;
2856
2857 if (get_user(frames, _frames))
2858 return -EFAULT;
2859 if (put_user(0, _frames))
2860 return -EFAULT;
2861 result = snd_pcm_rewind(substream, frames);
2862 __put_user(result, _frames);
2863 return result < 0 ? result : 0;
2864}
2865
2866static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream,
2867 snd_pcm_uframes_t __user *_frames)
2868{
2869 snd_pcm_uframes_t frames;
2870 snd_pcm_sframes_t result;
2871
2872 if (get_user(frames, _frames))
2873 return -EFAULT;
2874 if (put_user(0, _frames))
2875 return -EFAULT;
2876 result = snd_pcm_forward(substream, frames);
2877 __put_user(result, _frames);
2878 return result < 0 ? result : 0;
2879}
2880
2881static int snd_pcm_common_ioctl(struct file *file,
2882 struct snd_pcm_substream *substream,
2883 unsigned int cmd, void __user *arg)
2884{
2885 struct snd_pcm_file *pcm_file = file->private_data;
2886 int res;
2887
2888 if (PCM_RUNTIME_CHECK(substream))
2889 return -ENXIO;
2890
2891 res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0);
2892 if (res < 0)
2893 return res;
2894
2895 switch (cmd) {
2896 case SNDRV_PCM_IOCTL_PVERSION:
2897 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2898 case SNDRV_PCM_IOCTL_INFO:
2899 return snd_pcm_info_user(substream, arg);
2900 case SNDRV_PCM_IOCTL_TSTAMP:
2901 return 0;
2902 case SNDRV_PCM_IOCTL_TTSTAMP:
2903 return snd_pcm_tstamp(substream, arg);
2904 case SNDRV_PCM_IOCTL_USER_PVERSION:
2905 if (get_user(pcm_file->user_pversion,
2906 (unsigned int __user *)arg))
2907 return -EFAULT;
2908 return 0;
2909 case SNDRV_PCM_IOCTL_HW_REFINE:
2910 return snd_pcm_hw_refine_user(substream, arg);
2911 case SNDRV_PCM_IOCTL_HW_PARAMS:
2912 return snd_pcm_hw_params_user(substream, arg);
2913 case SNDRV_PCM_IOCTL_HW_FREE:
2914 return snd_pcm_hw_free(substream);
2915 case SNDRV_PCM_IOCTL_SW_PARAMS:
2916 return snd_pcm_sw_params_user(substream, arg);
2917 case SNDRV_PCM_IOCTL_STATUS:
2918 return snd_pcm_status_user(substream, arg, false);
2919 case SNDRV_PCM_IOCTL_STATUS_EXT:
2920 return snd_pcm_status_user(substream, arg, true);
2921 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2922 return snd_pcm_channel_info_user(substream, arg);
2923 case SNDRV_PCM_IOCTL_PREPARE:
2924 return snd_pcm_prepare(substream, file);
2925 case SNDRV_PCM_IOCTL_RESET:
2926 return snd_pcm_reset(substream);
2927 case SNDRV_PCM_IOCTL_START:
2928 return snd_pcm_start_lock_irq(substream);
2929 case SNDRV_PCM_IOCTL_LINK:
2930 return snd_pcm_link(substream, (int)(unsigned long) arg);
2931 case SNDRV_PCM_IOCTL_UNLINK:
2932 return snd_pcm_unlink(substream);
2933 case SNDRV_PCM_IOCTL_RESUME:
2934 return snd_pcm_resume(substream);
2935 case SNDRV_PCM_IOCTL_XRUN:
2936 return snd_pcm_xrun(substream);
2937 case SNDRV_PCM_IOCTL_HWSYNC:
2938 return snd_pcm_hwsync(substream);
2939 case SNDRV_PCM_IOCTL_DELAY:
2940 {
2941 snd_pcm_sframes_t delay;
2942 snd_pcm_sframes_t __user *res = arg;
2943 int err;
2944
2945 err = snd_pcm_delay(substream, &delay);
2946 if (err)
2947 return err;
2948 if (put_user(delay, res))
2949 return -EFAULT;
2950 return 0;
2951 }
2952 case SNDRV_PCM_IOCTL_SYNC_PTR:
2953 return snd_pcm_sync_ptr(substream, arg);
2954#ifdef CONFIG_SND_SUPPORT_OLD_API
2955 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2956 return snd_pcm_hw_refine_old_user(substream, arg);
2957 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2958 return snd_pcm_hw_params_old_user(substream, arg);
2959#endif
2960 case SNDRV_PCM_IOCTL_DRAIN:
2961 return snd_pcm_drain(substream, file);
2962 case SNDRV_PCM_IOCTL_DROP:
2963 return snd_pcm_drop(substream);
2964 case SNDRV_PCM_IOCTL_PAUSE:
2965 return snd_pcm_action_lock_irq(&snd_pcm_action_pause,
2966 substream,
2967 (int)(unsigned long)arg);
2968 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2969 case SNDRV_PCM_IOCTL_READI_FRAMES:
2970 return snd_pcm_xferi_frames_ioctl(substream, arg);
2971 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2972 case SNDRV_PCM_IOCTL_READN_FRAMES:
2973 return snd_pcm_xfern_frames_ioctl(substream, arg);
2974 case SNDRV_PCM_IOCTL_REWIND:
2975 return snd_pcm_rewind_ioctl(substream, arg);
2976 case SNDRV_PCM_IOCTL_FORWARD:
2977 return snd_pcm_forward_ioctl(substream, arg);
2978 }
2979 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2980 return -ENOTTY;
2981}
2982
2983static long snd_pcm_ioctl(struct file *file, unsigned int cmd,
2984 unsigned long arg)
2985{
2986 struct snd_pcm_file *pcm_file;
2987
2988 pcm_file = file->private_data;
2989
2990 if (((cmd >> 8) & 0xff) != 'A')
2991 return -ENOTTY;
2992
2993 return snd_pcm_common_ioctl(file, pcm_file->substream, cmd,
2994 (void __user *)arg);
2995}
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
3008 unsigned int cmd, void *arg)
3009{
3010 snd_pcm_uframes_t *frames = arg;
3011 snd_pcm_sframes_t result;
3012
3013 switch (cmd) {
3014 case SNDRV_PCM_IOCTL_FORWARD:
3015 {
3016
3017 if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
3018 return -EINVAL;
3019 result = snd_pcm_forward(substream, *frames);
3020 return result < 0 ? result : 0;
3021 }
3022 case SNDRV_PCM_IOCTL_HW_PARAMS:
3023 return snd_pcm_hw_params(substream, arg);
3024 case SNDRV_PCM_IOCTL_SW_PARAMS:
3025 return snd_pcm_sw_params(substream, arg);
3026 case SNDRV_PCM_IOCTL_PREPARE:
3027 return snd_pcm_prepare(substream, NULL);
3028 case SNDRV_PCM_IOCTL_START:
3029 return snd_pcm_start_lock_irq(substream);
3030 case SNDRV_PCM_IOCTL_DRAIN:
3031 return snd_pcm_drain(substream, NULL);
3032 case SNDRV_PCM_IOCTL_DROP:
3033 return snd_pcm_drop(substream);
3034 case SNDRV_PCM_IOCTL_DELAY:
3035 return snd_pcm_delay(substream, frames);
3036 default:
3037 return -EINVAL;
3038 }
3039}
3040EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3041
3042static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3043 loff_t * offset)
3044{
3045 struct snd_pcm_file *pcm_file;
3046 struct snd_pcm_substream *substream;
3047 struct snd_pcm_runtime *runtime;
3048 snd_pcm_sframes_t result;
3049
3050 pcm_file = file->private_data;
3051 substream = pcm_file->substream;
3052 if (PCM_RUNTIME_CHECK(substream))
3053 return -ENXIO;
3054 runtime = substream->runtime;
3055 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3056 return -EBADFD;
3057 if (!frame_aligned(runtime, count))
3058 return -EINVAL;
3059 count = bytes_to_frames(runtime, count);
3060 result = snd_pcm_lib_read(substream, buf, count);
3061 if (result > 0)
3062 result = frames_to_bytes(runtime, result);
3063 return result;
3064}
3065
3066static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3067 size_t count, loff_t * offset)
3068{
3069 struct snd_pcm_file *pcm_file;
3070 struct snd_pcm_substream *substream;
3071 struct snd_pcm_runtime *runtime;
3072 snd_pcm_sframes_t result;
3073
3074 pcm_file = file->private_data;
3075 substream = pcm_file->substream;
3076 if (PCM_RUNTIME_CHECK(substream))
3077 return -ENXIO;
3078 runtime = substream->runtime;
3079 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3080 return -EBADFD;
3081 if (!frame_aligned(runtime, count))
3082 return -EINVAL;
3083 count = bytes_to_frames(runtime, count);
3084 result = snd_pcm_lib_write(substream, buf, count);
3085 if (result > 0)
3086 result = frames_to_bytes(runtime, result);
3087 return result;
3088}
3089
3090static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
3091{
3092 struct snd_pcm_file *pcm_file;
3093 struct snd_pcm_substream *substream;
3094 struct snd_pcm_runtime *runtime;
3095 snd_pcm_sframes_t result;
3096 unsigned long i;
3097 void __user **bufs;
3098 snd_pcm_uframes_t frames;
3099
3100 pcm_file = iocb->ki_filp->private_data;
3101 substream = pcm_file->substream;
3102 if (PCM_RUNTIME_CHECK(substream))
3103 return -ENXIO;
3104 runtime = substream->runtime;
3105 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3106 return -EBADFD;
3107 if (!iter_is_iovec(to))
3108 return -EINVAL;
3109 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
3110 return -EINVAL;
3111 if (!frame_aligned(runtime, to->iov->iov_len))
3112 return -EINVAL;
3113 frames = bytes_to_samples(runtime, to->iov->iov_len);
3114 bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL);
3115 if (bufs == NULL)
3116 return -ENOMEM;
3117 for (i = 0; i < to->nr_segs; ++i)
3118 bufs[i] = to->iov[i].iov_base;
3119 result = snd_pcm_lib_readv(substream, bufs, frames);
3120 if (result > 0)
3121 result = frames_to_bytes(runtime, result);
3122 kfree(bufs);
3123 return result;
3124}
3125
3126static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
3127{
3128 struct snd_pcm_file *pcm_file;
3129 struct snd_pcm_substream *substream;
3130 struct snd_pcm_runtime *runtime;
3131 snd_pcm_sframes_t result;
3132 unsigned long i;
3133 void __user **bufs;
3134 snd_pcm_uframes_t frames;
3135
3136 pcm_file = iocb->ki_filp->private_data;
3137 substream = pcm_file->substream;
3138 if (PCM_RUNTIME_CHECK(substream))
3139 return -ENXIO;
3140 runtime = substream->runtime;
3141 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3142 return -EBADFD;
3143 if (!iter_is_iovec(from))
3144 return -EINVAL;
3145 if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
3146 !frame_aligned(runtime, from->iov->iov_len))
3147 return -EINVAL;
3148 frames = bytes_to_samples(runtime, from->iov->iov_len);
3149 bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL);
3150 if (bufs == NULL)
3151 return -ENOMEM;
3152 for (i = 0; i < from->nr_segs; ++i)
3153 bufs[i] = from->iov[i].iov_base;
3154 result = snd_pcm_lib_writev(substream, bufs, frames);
3155 if (result > 0)
3156 result = frames_to_bytes(runtime, result);
3157 kfree(bufs);
3158 return result;
3159}
3160
3161static __poll_t snd_pcm_poll(struct file *file, poll_table *wait)
3162{
3163 struct snd_pcm_file *pcm_file;
3164 struct snd_pcm_substream *substream;
3165 struct snd_pcm_runtime *runtime;
3166 __poll_t mask, ok;
3167 snd_pcm_uframes_t avail;
3168
3169 pcm_file = file->private_data;
3170
3171 substream = pcm_file->substream;
3172 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3173 ok = EPOLLOUT | EPOLLWRNORM;
3174 else
3175 ok = EPOLLIN | EPOLLRDNORM;
3176 if (PCM_RUNTIME_CHECK(substream))
3177 return ok | EPOLLERR;
3178
3179 runtime = substream->runtime;
3180 poll_wait(file, &runtime->sleep, wait);
3181
3182 mask = 0;
3183 snd_pcm_stream_lock_irq(substream);
3184 avail = snd_pcm_avail(substream);
3185 switch (runtime->status->state) {
3186 case SNDRV_PCM_STATE_RUNNING:
3187 case SNDRV_PCM_STATE_PREPARED:
3188 case SNDRV_PCM_STATE_PAUSED:
3189 if (avail >= runtime->control->avail_min)
3190 mask = ok;
3191 break;
3192 case SNDRV_PCM_STATE_DRAINING:
3193 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
3194 mask = ok;
3195 if (!avail)
3196 mask |= EPOLLERR;
3197 }
3198 break;
3199 default:
3200 mask = ok | EPOLLERR;
3201 break;
3202 }
3203 snd_pcm_stream_unlock_irq(substream);
3204 return mask;
3205}
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3216
3217
3218
3219static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf)
3220{
3221 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3222 struct snd_pcm_runtime *runtime;
3223
3224 if (substream == NULL)
3225 return VM_FAULT_SIGBUS;
3226 runtime = substream->runtime;
3227 vmf->page = virt_to_page(runtime->status);
3228 get_page(vmf->page);
3229 return 0;
3230}
3231
3232static const struct vm_operations_struct snd_pcm_vm_ops_status =
3233{
3234 .fault = snd_pcm_mmap_status_fault,
3235};
3236
3237static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3238 struct vm_area_struct *area)
3239{
3240 long size;
3241 if (!(area->vm_flags & VM_READ))
3242 return -EINVAL;
3243 size = area->vm_end - area->vm_start;
3244 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3245 return -EINVAL;
3246 area->vm_ops = &snd_pcm_vm_ops_status;
3247 area->vm_private_data = substream;
3248 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3249 return 0;
3250}
3251
3252
3253
3254
3255static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf)
3256{
3257 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3258 struct snd_pcm_runtime *runtime;
3259
3260 if (substream == NULL)
3261 return VM_FAULT_SIGBUS;
3262 runtime = substream->runtime;
3263 vmf->page = virt_to_page(runtime->control);
3264 get_page(vmf->page);
3265 return 0;
3266}
3267
3268static const struct vm_operations_struct snd_pcm_vm_ops_control =
3269{
3270 .fault = snd_pcm_mmap_control_fault,
3271};
3272
3273static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3274 struct vm_area_struct *area)
3275{
3276 long size;
3277 if (!(area->vm_flags & VM_READ))
3278 return -EINVAL;
3279 size = area->vm_end - area->vm_start;
3280 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3281 return -EINVAL;
3282 area->vm_ops = &snd_pcm_vm_ops_control;
3283 area->vm_private_data = substream;
3284 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3285 return 0;
3286}
3287
3288static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
3289{
3290 if (pcm_file->no_compat_mmap)
3291 return false;
3292
3293
3294
3295
3296 if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) &&
3297 (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR))
3298 return false;
3299 return true;
3300}
3301
3302static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
3303{
3304 if (pcm_file->no_compat_mmap)
3305 return false;
3306
3307
3308
3309
3310 if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)
3311 return false;
3312 return true;
3313}
3314
3315#else
3316
3317
3318
3319#define pcm_status_mmap_allowed(pcm_file) false
3320#define pcm_control_mmap_allowed(pcm_file) false
3321
3322static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3323 struct vm_area_struct *area)
3324{
3325 return -ENXIO;
3326}
3327static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3328 struct vm_area_struct *area)
3329{
3330 return -ENXIO;
3331}
3332#endif
3333
3334static inline struct page *
3335snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3336{
3337 void *vaddr = substream->runtime->dma_area + ofs;
3338 return virt_to_page(vaddr);
3339}
3340
3341
3342
3343
3344static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf)
3345{
3346 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3347 struct snd_pcm_runtime *runtime;
3348 unsigned long offset;
3349 struct page * page;
3350 size_t dma_bytes;
3351
3352 if (substream == NULL)
3353 return VM_FAULT_SIGBUS;
3354 runtime = substream->runtime;
3355 offset = vmf->pgoff << PAGE_SHIFT;
3356 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3357 if (offset > dma_bytes - PAGE_SIZE)
3358 return VM_FAULT_SIGBUS;
3359 if (substream->ops->page)
3360 page = substream->ops->page(substream, offset);
3361 else
3362 page = snd_pcm_default_page_ops(substream, offset);
3363 if (!page)
3364 return VM_FAULT_SIGBUS;
3365 get_page(page);
3366 vmf->page = page;
3367 return 0;
3368}
3369
3370static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3371 .open = snd_pcm_mmap_data_open,
3372 .close = snd_pcm_mmap_data_close,
3373};
3374
3375static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3376 .open = snd_pcm_mmap_data_open,
3377 .close = snd_pcm_mmap_data_close,
3378 .fault = snd_pcm_mmap_data_fault,
3379};
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3394 struct vm_area_struct *area)
3395{
3396 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3397#ifdef CONFIG_GENERIC_ALLOCATOR
3398 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3399 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3400 return remap_pfn_range(area, area->vm_start,
3401 substream->dma_buffer.addr >> PAGE_SHIFT,
3402 area->vm_end - area->vm_start, area->vm_page_prot);
3403 }
3404#endif
3405#ifndef CONFIG_X86
3406 if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page &&
3407 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3408 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3409 area,
3410 substream->runtime->dma_area,
3411 substream->runtime->dma_addr,
3412 substream->runtime->dma_bytes);
3413#endif
3414
3415 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3416 return 0;
3417}
3418EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3419
3420
3421
3422
3423#if SNDRV_PCM_INFO_MMAP_IOMEM
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3434 struct vm_area_struct *area)
3435{
3436 struct snd_pcm_runtime *runtime = substream->runtime;
3437
3438 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3439 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3440}
3441EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3442#endif
3443
3444
3445
3446
3447int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3448 struct vm_area_struct *area)
3449{
3450 struct snd_pcm_runtime *runtime;
3451 long size;
3452 unsigned long offset;
3453 size_t dma_bytes;
3454 int err;
3455
3456 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3457 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3458 return -EINVAL;
3459 } else {
3460 if (!(area->vm_flags & VM_READ))
3461 return -EINVAL;
3462 }
3463 runtime = substream->runtime;
3464 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3465 return -EBADFD;
3466 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3467 return -ENXIO;
3468 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3469 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3470 return -EINVAL;
3471 size = area->vm_end - area->vm_start;
3472 offset = area->vm_pgoff << PAGE_SHIFT;
3473 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3474 if ((size_t)size > dma_bytes)
3475 return -EINVAL;
3476 if (offset > dma_bytes - size)
3477 return -EINVAL;
3478
3479 area->vm_ops = &snd_pcm_vm_ops_data;
3480 area->vm_private_data = substream;
3481 if (substream->ops->mmap)
3482 err = substream->ops->mmap(substream, area);
3483 else
3484 err = snd_pcm_lib_default_mmap(substream, area);
3485 if (!err)
3486 atomic_inc(&substream->mmap_count);
3487 return err;
3488}
3489EXPORT_SYMBOL(snd_pcm_mmap_data);
3490
3491static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3492{
3493 struct snd_pcm_file * pcm_file;
3494 struct snd_pcm_substream *substream;
3495 unsigned long offset;
3496
3497 pcm_file = file->private_data;
3498 substream = pcm_file->substream;
3499 if (PCM_RUNTIME_CHECK(substream))
3500 return -ENXIO;
3501
3502 offset = area->vm_pgoff << PAGE_SHIFT;
3503 switch (offset) {
3504 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3505 if (!pcm_status_mmap_allowed(pcm_file))
3506 return -ENXIO;
3507 return snd_pcm_mmap_status(substream, file, area);
3508 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3509 if (!pcm_control_mmap_allowed(pcm_file))
3510 return -ENXIO;
3511 return snd_pcm_mmap_control(substream, file, area);
3512 default:
3513 return snd_pcm_mmap_data(substream, file, area);
3514 }
3515 return 0;
3516}
3517
3518static int snd_pcm_fasync(int fd, struct file * file, int on)
3519{
3520 struct snd_pcm_file * pcm_file;
3521 struct snd_pcm_substream *substream;
3522 struct snd_pcm_runtime *runtime;
3523
3524 pcm_file = file->private_data;
3525 substream = pcm_file->substream;
3526 if (PCM_RUNTIME_CHECK(substream))
3527 return -ENXIO;
3528 runtime = substream->runtime;
3529 return fasync_helper(fd, file, on, &runtime->fasync);
3530}
3531
3532
3533
3534
3535#ifdef CONFIG_COMPAT
3536#include "pcm_compat.c"
3537#else
3538#define snd_pcm_ioctl_compat NULL
3539#endif
3540
3541
3542
3543
3544
3545#ifdef CONFIG_SND_SUPPORT_OLD_API
3546#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3547#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3548
3549static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3550 struct snd_pcm_hw_params_old *oparams)
3551{
3552 unsigned int i;
3553
3554 memset(params, 0, sizeof(*params));
3555 params->flags = oparams->flags;
3556 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3557 params->masks[i].bits[0] = oparams->masks[i];
3558 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3559 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3560 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3561 params->info = oparams->info;
3562 params->msbits = oparams->msbits;
3563 params->rate_num = oparams->rate_num;
3564 params->rate_den = oparams->rate_den;
3565 params->fifo_size = oparams->fifo_size;
3566}
3567
3568static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3569 struct snd_pcm_hw_params *params)
3570{
3571 unsigned int i;
3572
3573 memset(oparams, 0, sizeof(*oparams));
3574 oparams->flags = params->flags;
3575 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3576 oparams->masks[i] = params->masks[i].bits[0];
3577 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3578 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3579 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3580 oparams->info = params->info;
3581 oparams->msbits = params->msbits;
3582 oparams->rate_num = params->rate_num;
3583 oparams->rate_den = params->rate_den;
3584 oparams->fifo_size = params->fifo_size;
3585}
3586
3587static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3588 struct snd_pcm_hw_params_old __user * _oparams)
3589{
3590 struct snd_pcm_hw_params *params;
3591 struct snd_pcm_hw_params_old *oparams = NULL;
3592 int err;
3593
3594 params = kmalloc(sizeof(*params), GFP_KERNEL);
3595 if (!params)
3596 return -ENOMEM;
3597
3598 oparams = memdup_user(_oparams, sizeof(*oparams));
3599 if (IS_ERR(oparams)) {
3600 err = PTR_ERR(oparams);
3601 goto out;
3602 }
3603 snd_pcm_hw_convert_from_old_params(params, oparams);
3604 err = snd_pcm_hw_refine(substream, params);
3605 if (err < 0)
3606 goto out_old;
3607
3608 err = fixup_unreferenced_params(substream, params);
3609 if (err < 0)
3610 goto out_old;
3611
3612 snd_pcm_hw_convert_to_old_params(oparams, params);
3613 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3614 err = -EFAULT;
3615out_old:
3616 kfree(oparams);
3617out:
3618 kfree(params);
3619 return err;
3620}
3621
3622static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3623 struct snd_pcm_hw_params_old __user * _oparams)
3624{
3625 struct snd_pcm_hw_params *params;
3626 struct snd_pcm_hw_params_old *oparams = NULL;
3627 int err;
3628
3629 params = kmalloc(sizeof(*params), GFP_KERNEL);
3630 if (!params)
3631 return -ENOMEM;
3632
3633 oparams = memdup_user(_oparams, sizeof(*oparams));
3634 if (IS_ERR(oparams)) {
3635 err = PTR_ERR(oparams);
3636 goto out;
3637 }
3638
3639 snd_pcm_hw_convert_from_old_params(params, oparams);
3640 err = snd_pcm_hw_params(substream, params);
3641 if (err < 0)
3642 goto out_old;
3643
3644 snd_pcm_hw_convert_to_old_params(oparams, params);
3645 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3646 err = -EFAULT;
3647out_old:
3648 kfree(oparams);
3649out:
3650 kfree(params);
3651 return err;
3652}
3653#endif
3654
3655#ifndef CONFIG_MMU
3656static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3657 unsigned long addr,
3658 unsigned long len,
3659 unsigned long pgoff,
3660 unsigned long flags)
3661{
3662 struct snd_pcm_file *pcm_file = file->private_data;
3663 struct snd_pcm_substream *substream = pcm_file->substream;
3664 struct snd_pcm_runtime *runtime = substream->runtime;
3665 unsigned long offset = pgoff << PAGE_SHIFT;
3666
3667 switch (offset) {
3668 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3669 return (unsigned long)runtime->status;
3670 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3671 return (unsigned long)runtime->control;
3672 default:
3673 return (unsigned long)runtime->dma_area + offset;
3674 }
3675}
3676#else
3677# define snd_pcm_get_unmapped_area NULL
3678#endif
3679
3680
3681
3682
3683
3684const struct file_operations snd_pcm_f_ops[2] = {
3685 {
3686 .owner = THIS_MODULE,
3687 .write = snd_pcm_write,
3688 .write_iter = snd_pcm_writev,
3689 .open = snd_pcm_playback_open,
3690 .release = snd_pcm_release,
3691 .llseek = no_llseek,
3692 .poll = snd_pcm_poll,
3693 .unlocked_ioctl = snd_pcm_ioctl,
3694 .compat_ioctl = snd_pcm_ioctl_compat,
3695 .mmap = snd_pcm_mmap,
3696 .fasync = snd_pcm_fasync,
3697 .get_unmapped_area = snd_pcm_get_unmapped_area,
3698 },
3699 {
3700 .owner = THIS_MODULE,
3701 .read = snd_pcm_read,
3702 .read_iter = snd_pcm_readv,
3703 .open = snd_pcm_capture_open,
3704 .release = snd_pcm_release,
3705 .llseek = no_llseek,
3706 .poll = snd_pcm_poll,
3707 .unlocked_ioctl = snd_pcm_ioctl,
3708 .compat_ioctl = snd_pcm_ioctl_compat,
3709 .mmap = snd_pcm_mmap,
3710 .fasync = snd_pcm_fasync,
3711 .get_unmapped_area = snd_pcm_get_unmapped_area,
3712 }
3713};
3714