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 (substream->ops->mmap ||
225 substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV)
226 return true;
227
228 return dma_can_mmap(substream->dma_buffer.dev.dev);
229}
230
231static int constrain_mask_params(struct snd_pcm_substream *substream,
232 struct snd_pcm_hw_params *params)
233{
234 struct snd_pcm_hw_constraints *constrs =
235 &substream->runtime->hw_constraints;
236 struct snd_mask *m;
237 unsigned int k;
238 struct snd_mask old_mask;
239 int changed;
240
241 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
242 m = hw_param_mask(params, k);
243 if (snd_mask_empty(m))
244 return -EINVAL;
245
246
247 if (!(params->rmask & (1 << k)))
248 continue;
249
250 if (trace_hw_mask_param_enabled())
251 old_mask = *m;
252
253 changed = snd_mask_refine(m, constrs_mask(constrs, k));
254 if (changed < 0)
255 return changed;
256 if (changed == 0)
257 continue;
258
259
260 trace_hw_mask_param(substream, k, 0, &old_mask, m);
261 params->cmask |= 1 << k;
262 }
263
264 return 0;
265}
266
267static int constrain_interval_params(struct snd_pcm_substream *substream,
268 struct snd_pcm_hw_params *params)
269{
270 struct snd_pcm_hw_constraints *constrs =
271 &substream->runtime->hw_constraints;
272 struct snd_interval *i;
273 unsigned int k;
274 struct snd_interval old_interval;
275 int changed;
276
277 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
278 i = hw_param_interval(params, k);
279 if (snd_interval_empty(i))
280 return -EINVAL;
281
282
283 if (!(params->rmask & (1 << k)))
284 continue;
285
286 if (trace_hw_interval_param_enabled())
287 old_interval = *i;
288
289 changed = snd_interval_refine(i, constrs_interval(constrs, k));
290 if (changed < 0)
291 return changed;
292 if (changed == 0)
293 continue;
294
295
296 trace_hw_interval_param(substream, k, 0, &old_interval, i);
297 params->cmask |= 1 << k;
298 }
299
300 return 0;
301}
302
303static int constrain_params_by_rules(struct snd_pcm_substream *substream,
304 struct snd_pcm_hw_params *params)
305{
306 struct snd_pcm_hw_constraints *constrs =
307 &substream->runtime->hw_constraints;
308 unsigned int k;
309 unsigned int *rstamps;
310 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
311 unsigned int stamp;
312 struct snd_pcm_hw_rule *r;
313 unsigned int d;
314 struct snd_mask old_mask;
315 struct snd_interval old_interval;
316 bool again;
317 int changed, err = 0;
318
319
320
321
322
323
324
325 rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL);
326 if (!rstamps)
327 return -ENOMEM;
328
329
330
331
332
333
334
335
336
337
338 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
339 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
340
341
342 stamp = 2;
343retry:
344
345 again = false;
346 for (k = 0; k < constrs->rules_num; k++) {
347 r = &constrs->rules[k];
348
349
350
351
352
353
354
355 if (r->cond && !(r->cond & params->flags))
356 continue;
357
358
359
360
361
362
363
364
365
366
367
368 for (d = 0; r->deps[d] >= 0; d++) {
369 if (vstamps[r->deps[d]] > rstamps[k])
370 break;
371 }
372 if (r->deps[d] < 0)
373 continue;
374
375 if (trace_hw_mask_param_enabled()) {
376 if (hw_is_mask(r->var))
377 old_mask = *hw_param_mask(params, r->var);
378 }
379 if (trace_hw_interval_param_enabled()) {
380 if (hw_is_interval(r->var))
381 old_interval = *hw_param_interval(params, r->var);
382 }
383
384 changed = r->func(params, r);
385 if (changed < 0) {
386 err = changed;
387 goto out;
388 }
389
390
391
392
393
394
395 if (changed && r->var >= 0) {
396 if (hw_is_mask(r->var)) {
397 trace_hw_mask_param(substream, r->var,
398 k + 1, &old_mask,
399 hw_param_mask(params, r->var));
400 }
401 if (hw_is_interval(r->var)) {
402 trace_hw_interval_param(substream, r->var,
403 k + 1, &old_interval,
404 hw_param_interval(params, r->var));
405 }
406
407 params->cmask |= (1 << r->var);
408 vstamps[r->var] = stamp;
409 again = true;
410 }
411
412 rstamps[k] = stamp++;
413 }
414
415
416 if (again)
417 goto retry;
418
419 out:
420 kfree(rstamps);
421 return err;
422}
423
424static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
425 struct snd_pcm_hw_params *params)
426{
427 const struct snd_interval *i;
428 const struct snd_mask *m;
429 int err;
430
431 if (!params->msbits) {
432 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
433 if (snd_interval_single(i))
434 params->msbits = snd_interval_value(i);
435 }
436
437 if (!params->rate_den) {
438 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
439 if (snd_interval_single(i)) {
440 params->rate_num = snd_interval_value(i);
441 params->rate_den = 1;
442 }
443 }
444
445 if (!params->fifo_size) {
446 m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
447 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
448 if (snd_mask_single(m) && snd_interval_single(i)) {
449 err = substream->ops->ioctl(substream,
450 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
451 if (err < 0)
452 return err;
453 }
454 }
455
456 if (!params->info) {
457 params->info = substream->runtime->hw.info;
458 params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
459 SNDRV_PCM_INFO_DRAIN_TRIGGER);
460 if (!hw_support_mmap(substream))
461 params->info &= ~(SNDRV_PCM_INFO_MMAP |
462 SNDRV_PCM_INFO_MMAP_VALID);
463 }
464
465 return 0;
466}
467
468int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
469 struct snd_pcm_hw_params *params)
470{
471 int err;
472
473 params->info = 0;
474 params->fifo_size = 0;
475 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
476 params->msbits = 0;
477 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
478 params->rate_num = 0;
479 params->rate_den = 0;
480 }
481
482 err = constrain_mask_params(substream, params);
483 if (err < 0)
484 return err;
485
486 err = constrain_interval_params(substream, params);
487 if (err < 0)
488 return err;
489
490 err = constrain_params_by_rules(substream, params);
491 if (err < 0)
492 return err;
493
494 params->rmask = 0;
495
496 return 0;
497}
498EXPORT_SYMBOL(snd_pcm_hw_refine);
499
500static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
501 struct snd_pcm_hw_params __user * _params)
502{
503 struct snd_pcm_hw_params *params;
504 int err;
505
506 params = memdup_user(_params, sizeof(*params));
507 if (IS_ERR(params))
508 return PTR_ERR(params);
509
510 err = snd_pcm_hw_refine(substream, params);
511 if (err < 0)
512 goto end;
513
514 err = fixup_unreferenced_params(substream, params);
515 if (err < 0)
516 goto end;
517
518 if (copy_to_user(_params, params, sizeof(*params)))
519 err = -EFAULT;
520end:
521 kfree(params);
522 return err;
523}
524
525static int period_to_usecs(struct snd_pcm_runtime *runtime)
526{
527 int usecs;
528
529 if (! runtime->rate)
530 return -1;
531
532
533 usecs = (750000 / runtime->rate) * runtime->period_size;
534 usecs += ((750000 % runtime->rate) * runtime->period_size) /
535 runtime->rate;
536
537 return usecs;
538}
539
540static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
541{
542 snd_pcm_stream_lock_irq(substream);
543 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
544 substream->runtime->status->state = state;
545 snd_pcm_stream_unlock_irq(substream);
546}
547
548static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
549 int event)
550{
551#ifdef CONFIG_SND_PCM_TIMER
552 if (substream->timer)
553 snd_timer_notify(substream->timer, event,
554 &substream->runtime->trigger_tstamp);
555#endif
556}
557
558
559
560
561
562
563
564
565
566
567
568
569
570static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
571 struct snd_pcm_hw_params *params)
572{
573 static const int vars[] = {
574 SNDRV_PCM_HW_PARAM_ACCESS,
575 SNDRV_PCM_HW_PARAM_FORMAT,
576 SNDRV_PCM_HW_PARAM_SUBFORMAT,
577 SNDRV_PCM_HW_PARAM_CHANNELS,
578 SNDRV_PCM_HW_PARAM_RATE,
579 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
580 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
581 SNDRV_PCM_HW_PARAM_TICK_TIME,
582 -1
583 };
584 const int *v;
585 struct snd_mask old_mask;
586 struct snd_interval old_interval;
587 int changed;
588
589 for (v = vars; *v != -1; v++) {
590
591 if (trace_hw_mask_param_enabled()) {
592 if (hw_is_mask(*v))
593 old_mask = *hw_param_mask(params, *v);
594 }
595 if (trace_hw_interval_param_enabled()) {
596 if (hw_is_interval(*v))
597 old_interval = *hw_param_interval(params, *v);
598 }
599 if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
600 changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
601 else
602 changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
603 if (changed < 0)
604 return changed;
605 if (changed == 0)
606 continue;
607
608
609 if (hw_is_mask(*v)) {
610 trace_hw_mask_param(pcm, *v, 0, &old_mask,
611 hw_param_mask(params, *v));
612 }
613 if (hw_is_interval(*v)) {
614 trace_hw_interval_param(pcm, *v, 0, &old_interval,
615 hw_param_interval(params, *v));
616 }
617 }
618
619 return 0;
620}
621
622static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
623 struct snd_pcm_hw_params *params)
624{
625 struct snd_pcm_runtime *runtime;
626 int err, usecs;
627 unsigned int bits;
628 snd_pcm_uframes_t frames;
629
630 if (PCM_RUNTIME_CHECK(substream))
631 return -ENXIO;
632 runtime = substream->runtime;
633 snd_pcm_stream_lock_irq(substream);
634 switch (runtime->status->state) {
635 case SNDRV_PCM_STATE_OPEN:
636 case SNDRV_PCM_STATE_SETUP:
637 case SNDRV_PCM_STATE_PREPARED:
638 break;
639 default:
640 snd_pcm_stream_unlock_irq(substream);
641 return -EBADFD;
642 }
643 snd_pcm_stream_unlock_irq(substream);
644#if IS_ENABLED(CONFIG_SND_PCM_OSS)
645 if (!substream->oss.oss)
646#endif
647 if (atomic_read(&substream->mmap_count))
648 return -EBADFD;
649
650 params->rmask = ~0U;
651 err = snd_pcm_hw_refine(substream, params);
652 if (err < 0)
653 goto _error;
654
655 err = snd_pcm_hw_params_choose(substream, params);
656 if (err < 0)
657 goto _error;
658
659 err = fixup_unreferenced_params(substream, params);
660 if (err < 0)
661 goto _error;
662
663 if (substream->ops->hw_params != NULL) {
664 err = substream->ops->hw_params(substream, params);
665 if (err < 0)
666 goto _error;
667 }
668
669 runtime->access = params_access(params);
670 runtime->format = params_format(params);
671 runtime->subformat = params_subformat(params);
672 runtime->channels = params_channels(params);
673 runtime->rate = params_rate(params);
674 runtime->period_size = params_period_size(params);
675 runtime->periods = params_periods(params);
676 runtime->buffer_size = params_buffer_size(params);
677 runtime->info = params->info;
678 runtime->rate_num = params->rate_num;
679 runtime->rate_den = params->rate_den;
680 runtime->no_period_wakeup =
681 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
682 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
683
684 bits = snd_pcm_format_physical_width(runtime->format);
685 runtime->sample_bits = bits;
686 bits *= runtime->channels;
687 runtime->frame_bits = bits;
688 frames = 1;
689 while (bits % 8 != 0) {
690 bits *= 2;
691 frames *= 2;
692 }
693 runtime->byte_align = bits / 8;
694 runtime->min_align = frames;
695
696
697 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
698 runtime->period_step = 1;
699 runtime->control->avail_min = runtime->period_size;
700 runtime->start_threshold = 1;
701 runtime->stop_threshold = runtime->buffer_size;
702 runtime->silence_threshold = 0;
703 runtime->silence_size = 0;
704 runtime->boundary = runtime->buffer_size;
705 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
706 runtime->boundary *= 2;
707
708 snd_pcm_timer_resolution_change(substream);
709 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
710
711 if (pm_qos_request_active(&substream->latency_pm_qos_req))
712 pm_qos_remove_request(&substream->latency_pm_qos_req);
713 if ((usecs = period_to_usecs(runtime)) >= 0)
714 pm_qos_add_request(&substream->latency_pm_qos_req,
715 PM_QOS_CPU_DMA_LATENCY, usecs);
716 return 0;
717 _error:
718
719
720
721 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
722 if (substream->ops->hw_free != NULL)
723 substream->ops->hw_free(substream);
724 return err;
725}
726
727static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
728 struct snd_pcm_hw_params __user * _params)
729{
730 struct snd_pcm_hw_params *params;
731 int err;
732
733 params = memdup_user(_params, sizeof(*params));
734 if (IS_ERR(params))
735 return PTR_ERR(params);
736
737 err = snd_pcm_hw_params(substream, params);
738 if (err < 0)
739 goto end;
740
741 if (copy_to_user(_params, params, sizeof(*params)))
742 err = -EFAULT;
743end:
744 kfree(params);
745 return err;
746}
747
748static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
749{
750 struct snd_pcm_runtime *runtime;
751 int result = 0;
752
753 if (PCM_RUNTIME_CHECK(substream))
754 return -ENXIO;
755 runtime = substream->runtime;
756 snd_pcm_stream_lock_irq(substream);
757 switch (runtime->status->state) {
758 case SNDRV_PCM_STATE_SETUP:
759 case SNDRV_PCM_STATE_PREPARED:
760 break;
761 default:
762 snd_pcm_stream_unlock_irq(substream);
763 return -EBADFD;
764 }
765 snd_pcm_stream_unlock_irq(substream);
766 if (atomic_read(&substream->mmap_count))
767 return -EBADFD;
768 if (substream->ops->hw_free)
769 result = substream->ops->hw_free(substream);
770 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
771 pm_qos_remove_request(&substream->latency_pm_qos_req);
772 return result;
773}
774
775static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
776 struct snd_pcm_sw_params *params)
777{
778 struct snd_pcm_runtime *runtime;
779 int err;
780
781 if (PCM_RUNTIME_CHECK(substream))
782 return -ENXIO;
783 runtime = substream->runtime;
784 snd_pcm_stream_lock_irq(substream);
785 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
786 snd_pcm_stream_unlock_irq(substream);
787 return -EBADFD;
788 }
789 snd_pcm_stream_unlock_irq(substream);
790
791 if (params->tstamp_mode < 0 ||
792 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
793 return -EINVAL;
794 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
795 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
796 return -EINVAL;
797 if (params->avail_min == 0)
798 return -EINVAL;
799 if (params->silence_size >= runtime->boundary) {
800 if (params->silence_threshold != 0)
801 return -EINVAL;
802 } else {
803 if (params->silence_size > params->silence_threshold)
804 return -EINVAL;
805 if (params->silence_threshold > runtime->buffer_size)
806 return -EINVAL;
807 }
808 err = 0;
809 snd_pcm_stream_lock_irq(substream);
810 runtime->tstamp_mode = params->tstamp_mode;
811 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
812 runtime->tstamp_type = params->tstamp_type;
813 runtime->period_step = params->period_step;
814 runtime->control->avail_min = params->avail_min;
815 runtime->start_threshold = params->start_threshold;
816 runtime->stop_threshold = params->stop_threshold;
817 runtime->silence_threshold = params->silence_threshold;
818 runtime->silence_size = params->silence_size;
819 params->boundary = runtime->boundary;
820 if (snd_pcm_running(substream)) {
821 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
822 runtime->silence_size > 0)
823 snd_pcm_playback_silence(substream, ULONG_MAX);
824 err = snd_pcm_update_state(substream, runtime);
825 }
826 snd_pcm_stream_unlock_irq(substream);
827 return err;
828}
829
830static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
831 struct snd_pcm_sw_params __user * _params)
832{
833 struct snd_pcm_sw_params params;
834 int err;
835 if (copy_from_user(¶ms, _params, sizeof(params)))
836 return -EFAULT;
837 err = snd_pcm_sw_params(substream, ¶ms);
838 if (copy_to_user(_params, ¶ms, sizeof(params)))
839 return -EFAULT;
840 return err;
841}
842
843static inline snd_pcm_uframes_t
844snd_pcm_calc_delay(struct snd_pcm_substream *substream)
845{
846 snd_pcm_uframes_t delay;
847
848 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
849 delay = snd_pcm_playback_hw_avail(substream->runtime);
850 else
851 delay = snd_pcm_capture_avail(substream->runtime);
852 return delay + substream->runtime->delay;
853}
854
855int snd_pcm_status(struct snd_pcm_substream *substream,
856 struct snd_pcm_status *status)
857{
858 struct snd_pcm_runtime *runtime = substream->runtime;
859
860 snd_pcm_stream_lock_irq(substream);
861
862 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
863 &runtime->audio_tstamp_config);
864
865
866 if (runtime->audio_tstamp_config.type_requested ==
867 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
868 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
869 runtime->audio_tstamp_config.type_requested =
870 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
871 else
872 runtime->audio_tstamp_config.type_requested =
873 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
874 runtime->audio_tstamp_report.valid = 0;
875 } else
876 runtime->audio_tstamp_report.valid = 1;
877
878 status->state = runtime->status->state;
879 status->suspended_state = runtime->status->suspended_state;
880 if (status->state == SNDRV_PCM_STATE_OPEN)
881 goto _end;
882 status->trigger_tstamp = runtime->trigger_tstamp;
883 if (snd_pcm_running(substream)) {
884 snd_pcm_update_hw_ptr(substream);
885 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
886 status->tstamp = runtime->status->tstamp;
887 status->driver_tstamp = runtime->driver_tstamp;
888 status->audio_tstamp =
889 runtime->status->audio_tstamp;
890 if (runtime->audio_tstamp_report.valid == 1)
891
892 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
893 &status->audio_tstamp_accuracy,
894 &runtime->audio_tstamp_report);
895
896 goto _tstamp_end;
897 }
898 } else {
899
900 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
901 snd_pcm_gettime(runtime, &status->tstamp);
902 }
903 _tstamp_end:
904 status->appl_ptr = runtime->control->appl_ptr;
905 status->hw_ptr = runtime->status->hw_ptr;
906 status->avail = snd_pcm_avail(substream);
907 status->delay = snd_pcm_running(substream) ?
908 snd_pcm_calc_delay(substream) : 0;
909 status->avail_max = runtime->avail_max;
910 status->overrange = runtime->overrange;
911 runtime->avail_max = 0;
912 runtime->overrange = 0;
913 _end:
914 snd_pcm_stream_unlock_irq(substream);
915 return 0;
916}
917
918static int snd_pcm_status_user(struct snd_pcm_substream *substream,
919 struct snd_pcm_status __user * _status,
920 bool ext)
921{
922 struct snd_pcm_status status;
923 int res;
924
925 memset(&status, 0, sizeof(status));
926
927
928
929
930
931 if (ext && get_user(status.audio_tstamp_data,
932 (u32 __user *)(&_status->audio_tstamp_data)))
933 return -EFAULT;
934 res = snd_pcm_status(substream, &status);
935 if (res < 0)
936 return res;
937 if (copy_to_user(_status, &status, sizeof(status)))
938 return -EFAULT;
939 return 0;
940}
941
942static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
943 struct snd_pcm_channel_info * info)
944{
945 struct snd_pcm_runtime *runtime;
946 unsigned int channel;
947
948 channel = info->channel;
949 runtime = substream->runtime;
950 snd_pcm_stream_lock_irq(substream);
951 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
952 snd_pcm_stream_unlock_irq(substream);
953 return -EBADFD;
954 }
955 snd_pcm_stream_unlock_irq(substream);
956 if (channel >= runtime->channels)
957 return -EINVAL;
958 memset(info, 0, sizeof(*info));
959 info->channel = channel;
960 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
961}
962
963static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
964 struct snd_pcm_channel_info __user * _info)
965{
966 struct snd_pcm_channel_info info;
967 int res;
968
969 if (copy_from_user(&info, _info, sizeof(info)))
970 return -EFAULT;
971 res = snd_pcm_channel_info(substream, &info);
972 if (res < 0)
973 return res;
974 if (copy_to_user(_info, &info, sizeof(info)))
975 return -EFAULT;
976 return 0;
977}
978
979static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
980{
981 struct snd_pcm_runtime *runtime = substream->runtime;
982 if (runtime->trigger_master == NULL)
983 return;
984 if (runtime->trigger_master == substream) {
985 if (!runtime->trigger_tstamp_latched)
986 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
987 } else {
988 snd_pcm_trigger_tstamp(runtime->trigger_master);
989 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
990 }
991 runtime->trigger_master = NULL;
992}
993
994struct action_ops {
995 int (*pre_action)(struct snd_pcm_substream *substream, int state);
996 int (*do_action)(struct snd_pcm_substream *substream, int state);
997 void (*undo_action)(struct snd_pcm_substream *substream, int state);
998 void (*post_action)(struct snd_pcm_substream *substream, int state);
999};
1000
1001
1002
1003
1004
1005
1006static int snd_pcm_action_group(const struct action_ops *ops,
1007 struct snd_pcm_substream *substream,
1008 int state, int do_lock)
1009{
1010 struct snd_pcm_substream *s = NULL;
1011 struct snd_pcm_substream *s1;
1012 int res = 0, depth = 1;
1013
1014 snd_pcm_group_for_each_entry(s, substream) {
1015 if (do_lock && s != substream) {
1016 if (s->pcm->nonatomic)
1017 mutex_lock_nested(&s->self_group.mutex, depth);
1018 else
1019 spin_lock_nested(&s->self_group.lock, depth);
1020 depth++;
1021 }
1022 res = ops->pre_action(s, state);
1023 if (res < 0)
1024 goto _unlock;
1025 }
1026 snd_pcm_group_for_each_entry(s, substream) {
1027 res = ops->do_action(s, state);
1028 if (res < 0) {
1029 if (ops->undo_action) {
1030 snd_pcm_group_for_each_entry(s1, substream) {
1031 if (s1 == s)
1032 break;
1033 ops->undo_action(s1, state);
1034 }
1035 }
1036 s = NULL;
1037 goto _unlock;
1038 }
1039 }
1040 snd_pcm_group_for_each_entry(s, substream) {
1041 ops->post_action(s, state);
1042 }
1043 _unlock:
1044 if (do_lock) {
1045
1046 snd_pcm_group_for_each_entry(s1, substream) {
1047 if (s1 != substream) {
1048 if (s1->pcm->nonatomic)
1049 mutex_unlock(&s1->self_group.mutex);
1050 else
1051 spin_unlock(&s1->self_group.lock);
1052 }
1053 if (s1 == s)
1054 break;
1055 }
1056 }
1057 return res;
1058}
1059
1060
1061
1062
1063static int snd_pcm_action_single(const struct action_ops *ops,
1064 struct snd_pcm_substream *substream,
1065 int state)
1066{
1067 int res;
1068
1069 res = ops->pre_action(substream, state);
1070 if (res < 0)
1071 return res;
1072 res = ops->do_action(substream, state);
1073 if (res == 0)
1074 ops->post_action(substream, state);
1075 else if (ops->undo_action)
1076 ops->undo_action(substream, state);
1077 return res;
1078}
1079
1080static void snd_pcm_group_assign(struct snd_pcm_substream *substream,
1081 struct snd_pcm_group *new_group)
1082{
1083 substream->group = new_group;
1084 list_move(&substream->link_list, &new_group->substreams);
1085}
1086
1087
1088
1089
1090
1091static void snd_pcm_group_unref(struct snd_pcm_group *group,
1092 struct snd_pcm_substream *substream)
1093{
1094 bool do_free;
1095
1096 if (!group)
1097 return;
1098 do_free = refcount_dec_and_test(&group->refs);
1099 snd_pcm_group_unlock(group, substream->pcm->nonatomic);
1100 if (do_free)
1101 kfree(group);
1102}
1103
1104
1105
1106
1107
1108static struct snd_pcm_group *
1109snd_pcm_stream_group_ref(struct snd_pcm_substream *substream)
1110{
1111 bool nonatomic = substream->pcm->nonatomic;
1112 struct snd_pcm_group *group;
1113 bool trylock;
1114
1115 for (;;) {
1116 if (!snd_pcm_stream_linked(substream))
1117 return NULL;
1118 group = substream->group;
1119
1120 refcount_inc(&group->refs);
1121
1122 trylock = nonatomic ? mutex_trylock(&group->mutex) :
1123 spin_trylock(&group->lock);
1124 if (trylock)
1125 break;
1126
1127
1128 snd_pcm_stream_unlock(substream);
1129 snd_pcm_group_lock(group, nonatomic);
1130 snd_pcm_stream_lock(substream);
1131
1132
1133 if (substream->group == group)
1134 break;
1135
1136 snd_pcm_group_unref(group, substream);
1137 }
1138 return group;
1139}
1140
1141
1142
1143
1144static int snd_pcm_action(const struct action_ops *ops,
1145 struct snd_pcm_substream *substream,
1146 int state)
1147{
1148 struct snd_pcm_group *group;
1149 int res;
1150
1151 group = snd_pcm_stream_group_ref(substream);
1152 if (group)
1153 res = snd_pcm_action_group(ops, substream, state, 1);
1154 else
1155 res = snd_pcm_action_single(ops, substream, state);
1156 snd_pcm_group_unref(group, substream);
1157 return res;
1158}
1159
1160
1161
1162
1163static int snd_pcm_action_lock_irq(const struct action_ops *ops,
1164 struct snd_pcm_substream *substream,
1165 int state)
1166{
1167 int res;
1168
1169 snd_pcm_stream_lock_irq(substream);
1170 res = snd_pcm_action(ops, substream, state);
1171 snd_pcm_stream_unlock_irq(substream);
1172 return res;
1173}
1174
1175
1176
1177static int snd_pcm_action_nonatomic(const struct action_ops *ops,
1178 struct snd_pcm_substream *substream,
1179 int state)
1180{
1181 int res;
1182
1183
1184 down_read(&snd_pcm_link_rwsem);
1185 if (snd_pcm_stream_linked(substream))
1186 res = snd_pcm_action_group(ops, substream, state, 0);
1187 else
1188 res = snd_pcm_action_single(ops, substream, state);
1189 up_read(&snd_pcm_link_rwsem);
1190 return res;
1191}
1192
1193
1194
1195
1196static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1197{
1198 struct snd_pcm_runtime *runtime = substream->runtime;
1199 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1200 return -EBADFD;
1201 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1202 !snd_pcm_playback_data(substream))
1203 return -EPIPE;
1204 runtime->trigger_tstamp_latched = false;
1205 runtime->trigger_master = substream;
1206 return 0;
1207}
1208
1209static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1210{
1211 if (substream->runtime->trigger_master != substream)
1212 return 0;
1213 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1214}
1215
1216static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1217{
1218 if (substream->runtime->trigger_master == substream)
1219 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1220}
1221
1222static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1223{
1224 struct snd_pcm_runtime *runtime = substream->runtime;
1225 snd_pcm_trigger_tstamp(substream);
1226 runtime->hw_ptr_jiffies = jiffies;
1227 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1228 runtime->rate;
1229 runtime->status->state = state;
1230 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1231 runtime->silence_size > 0)
1232 snd_pcm_playback_silence(substream, ULONG_MAX);
1233 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
1234}
1235
1236static const struct action_ops snd_pcm_action_start = {
1237 .pre_action = snd_pcm_pre_start,
1238 .do_action = snd_pcm_do_start,
1239 .undo_action = snd_pcm_undo_start,
1240 .post_action = snd_pcm_post_start
1241};
1242
1243
1244
1245
1246
1247
1248
1249
1250int snd_pcm_start(struct snd_pcm_substream *substream)
1251{
1252 return snd_pcm_action(&snd_pcm_action_start, substream,
1253 SNDRV_PCM_STATE_RUNNING);
1254}
1255
1256
1257static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
1258{
1259 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
1260 SNDRV_PCM_STATE_RUNNING);
1261}
1262
1263
1264
1265
1266static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1267{
1268 struct snd_pcm_runtime *runtime = substream->runtime;
1269 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1270 return -EBADFD;
1271 runtime->trigger_master = substream;
1272 return 0;
1273}
1274
1275static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1276{
1277 if (substream->runtime->trigger_master == substream &&
1278 snd_pcm_running(substream))
1279 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1280 return 0;
1281}
1282
1283static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1284{
1285 struct snd_pcm_runtime *runtime = substream->runtime;
1286 if (runtime->status->state != state) {
1287 snd_pcm_trigger_tstamp(substream);
1288 runtime->status->state = state;
1289 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
1290 }
1291 wake_up(&runtime->sleep);
1292 wake_up(&runtime->tsleep);
1293}
1294
1295static const struct action_ops snd_pcm_action_stop = {
1296 .pre_action = snd_pcm_pre_stop,
1297 .do_action = snd_pcm_do_stop,
1298 .post_action = snd_pcm_post_stop
1299};
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1311{
1312 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1313}
1314EXPORT_SYMBOL(snd_pcm_stop);
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1326{
1327 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1328 SNDRV_PCM_STATE_SETUP);
1329}
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1341{
1342 unsigned long flags;
1343
1344 snd_pcm_stream_lock_irqsave(substream, flags);
1345 if (substream->runtime && snd_pcm_running(substream))
1346 __snd_pcm_xrun(substream);
1347 snd_pcm_stream_unlock_irqrestore(substream, flags);
1348 return 0;
1349}
1350EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1351
1352
1353
1354
1355static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1356{
1357 struct snd_pcm_runtime *runtime = substream->runtime;
1358 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1359 return -ENOSYS;
1360 if (push) {
1361 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1362 return -EBADFD;
1363 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1364 return -EBADFD;
1365 runtime->trigger_master = substream;
1366 return 0;
1367}
1368
1369static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1370{
1371 if (substream->runtime->trigger_master != substream)
1372 return 0;
1373
1374
1375 if (push)
1376 snd_pcm_update_hw_ptr(substream);
1377
1378
1379
1380
1381 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1382 return substream->ops->trigger(substream,
1383 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1384 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1385}
1386
1387static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1388{
1389 if (substream->runtime->trigger_master == substream)
1390 substream->ops->trigger(substream,
1391 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1392 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1393}
1394
1395static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1396{
1397 struct snd_pcm_runtime *runtime = substream->runtime;
1398 snd_pcm_trigger_tstamp(substream);
1399 if (push) {
1400 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1401 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
1402 wake_up(&runtime->sleep);
1403 wake_up(&runtime->tsleep);
1404 } else {
1405 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1406 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
1407 }
1408}
1409
1410static const struct action_ops snd_pcm_action_pause = {
1411 .pre_action = snd_pcm_pre_pause,
1412 .do_action = snd_pcm_do_pause,
1413 .undo_action = snd_pcm_undo_pause,
1414 .post_action = snd_pcm_post_pause
1415};
1416
1417
1418
1419
1420static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1421{
1422 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1423}
1424
1425#ifdef CONFIG_PM
1426
1427
1428static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1429{
1430 struct snd_pcm_runtime *runtime = substream->runtime;
1431 switch (runtime->status->state) {
1432 case SNDRV_PCM_STATE_SUSPENDED:
1433 return -EBUSY;
1434
1435 case SNDRV_PCM_STATE_OPEN:
1436 case SNDRV_PCM_STATE_SETUP:
1437 case SNDRV_PCM_STATE_DISCONNECTED:
1438 return -EBUSY;
1439 }
1440 runtime->trigger_master = substream;
1441 return 0;
1442}
1443
1444static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1445{
1446 struct snd_pcm_runtime *runtime = substream->runtime;
1447 if (runtime->trigger_master != substream)
1448 return 0;
1449 if (! snd_pcm_running(substream))
1450 return 0;
1451 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1452 return 0;
1453}
1454
1455static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1456{
1457 struct snd_pcm_runtime *runtime = substream->runtime;
1458 snd_pcm_trigger_tstamp(substream);
1459 runtime->status->suspended_state = runtime->status->state;
1460 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1461 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
1462 wake_up(&runtime->sleep);
1463 wake_up(&runtime->tsleep);
1464}
1465
1466static const struct action_ops snd_pcm_action_suspend = {
1467 .pre_action = snd_pcm_pre_suspend,
1468 .do_action = snd_pcm_do_suspend,
1469 .post_action = snd_pcm_post_suspend
1470};
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480static int snd_pcm_suspend(struct snd_pcm_substream *substream)
1481{
1482 int err;
1483 unsigned long flags;
1484
1485 snd_pcm_stream_lock_irqsave(substream, flags);
1486 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1487 snd_pcm_stream_unlock_irqrestore(substream, flags);
1488 return err;
1489}
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499int snd_pcm_suspend_all(struct snd_pcm *pcm)
1500{
1501 struct snd_pcm_substream *substream;
1502 int stream, err = 0;
1503
1504 if (! pcm)
1505 return 0;
1506
1507 for (stream = 0; stream < 2; stream++) {
1508 for (substream = pcm->streams[stream].substream;
1509 substream; substream = substream->next) {
1510
1511 if (substream->runtime == NULL)
1512 continue;
1513
1514
1515
1516
1517
1518 if (!substream->ops)
1519 continue;
1520
1521 err = snd_pcm_suspend(substream);
1522 if (err < 0 && err != -EBUSY)
1523 return err;
1524 }
1525 }
1526 return 0;
1527}
1528EXPORT_SYMBOL(snd_pcm_suspend_all);
1529
1530
1531
1532static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1533{
1534 struct snd_pcm_runtime *runtime = substream->runtime;
1535 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1536 return -ENOSYS;
1537 runtime->trigger_master = substream;
1538 return 0;
1539}
1540
1541static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1542{
1543 struct snd_pcm_runtime *runtime = substream->runtime;
1544 if (runtime->trigger_master != substream)
1545 return 0;
1546
1547 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1548 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1549 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1550 return 0;
1551 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1552}
1553
1554static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1555{
1556 if (substream->runtime->trigger_master == substream &&
1557 snd_pcm_running(substream))
1558 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1559}
1560
1561static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1562{
1563 struct snd_pcm_runtime *runtime = substream->runtime;
1564 snd_pcm_trigger_tstamp(substream);
1565 runtime->status->state = runtime->status->suspended_state;
1566 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
1567}
1568
1569static const struct action_ops snd_pcm_action_resume = {
1570 .pre_action = snd_pcm_pre_resume,
1571 .do_action = snd_pcm_do_resume,
1572 .undo_action = snd_pcm_undo_resume,
1573 .post_action = snd_pcm_post_resume
1574};
1575
1576static int snd_pcm_resume(struct snd_pcm_substream *substream)
1577{
1578 return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1579}
1580
1581#else
1582
1583static int snd_pcm_resume(struct snd_pcm_substream *substream)
1584{
1585 return -ENOSYS;
1586}
1587
1588#endif
1589
1590
1591
1592
1593
1594
1595static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1596{
1597 struct snd_pcm_runtime *runtime = substream->runtime;
1598 int result;
1599
1600 snd_pcm_stream_lock_irq(substream);
1601 switch (runtime->status->state) {
1602 case SNDRV_PCM_STATE_XRUN:
1603 result = 0;
1604 break;
1605 case SNDRV_PCM_STATE_RUNNING:
1606 __snd_pcm_xrun(substream);
1607 result = 0;
1608 break;
1609 default:
1610 result = -EBADFD;
1611 }
1612 snd_pcm_stream_unlock_irq(substream);
1613 return result;
1614}
1615
1616
1617
1618
1619static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1620{
1621 struct snd_pcm_runtime *runtime = substream->runtime;
1622 switch (runtime->status->state) {
1623 case SNDRV_PCM_STATE_RUNNING:
1624 case SNDRV_PCM_STATE_PREPARED:
1625 case SNDRV_PCM_STATE_PAUSED:
1626 case SNDRV_PCM_STATE_SUSPENDED:
1627 return 0;
1628 default:
1629 return -EBADFD;
1630 }
1631}
1632
1633static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1634{
1635 struct snd_pcm_runtime *runtime = substream->runtime;
1636 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1637 if (err < 0)
1638 return err;
1639 runtime->hw_ptr_base = 0;
1640 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1641 runtime->status->hw_ptr % runtime->period_size;
1642 runtime->silence_start = runtime->status->hw_ptr;
1643 runtime->silence_filled = 0;
1644 return 0;
1645}
1646
1647static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1648{
1649 struct snd_pcm_runtime *runtime = substream->runtime;
1650 runtime->control->appl_ptr = runtime->status->hw_ptr;
1651 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1652 runtime->silence_size > 0)
1653 snd_pcm_playback_silence(substream, ULONG_MAX);
1654}
1655
1656static const struct action_ops snd_pcm_action_reset = {
1657 .pre_action = snd_pcm_pre_reset,
1658 .do_action = snd_pcm_do_reset,
1659 .post_action = snd_pcm_post_reset
1660};
1661
1662static int snd_pcm_reset(struct snd_pcm_substream *substream)
1663{
1664 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1665}
1666
1667
1668
1669
1670
1671static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1672 int f_flags)
1673{
1674 struct snd_pcm_runtime *runtime = substream->runtime;
1675 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1676 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1677 return -EBADFD;
1678 if (snd_pcm_running(substream))
1679 return -EBUSY;
1680 substream->f_flags = f_flags;
1681 return 0;
1682}
1683
1684static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1685{
1686 int err;
1687 err = substream->ops->prepare(substream);
1688 if (err < 0)
1689 return err;
1690 return snd_pcm_do_reset(substream, 0);
1691}
1692
1693static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1694{
1695 struct snd_pcm_runtime *runtime = substream->runtime;
1696 runtime->control->appl_ptr = runtime->status->hw_ptr;
1697 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1698}
1699
1700static const struct action_ops snd_pcm_action_prepare = {
1701 .pre_action = snd_pcm_pre_prepare,
1702 .do_action = snd_pcm_do_prepare,
1703 .post_action = snd_pcm_post_prepare
1704};
1705
1706
1707
1708
1709
1710
1711
1712
1713static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1714 struct file *file)
1715{
1716 int f_flags;
1717
1718 if (file)
1719 f_flags = file->f_flags;
1720 else
1721 f_flags = substream->f_flags;
1722
1723 snd_pcm_stream_lock_irq(substream);
1724 switch (substream->runtime->status->state) {
1725 case SNDRV_PCM_STATE_PAUSED:
1726 snd_pcm_pause(substream, 0);
1727
1728 case SNDRV_PCM_STATE_SUSPENDED:
1729 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1730 break;
1731 }
1732 snd_pcm_stream_unlock_irq(substream);
1733
1734 return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1735 substream, f_flags);
1736}
1737
1738
1739
1740
1741
1742static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1743{
1744 struct snd_pcm_runtime *runtime = substream->runtime;
1745 switch (runtime->status->state) {
1746 case SNDRV_PCM_STATE_OPEN:
1747 case SNDRV_PCM_STATE_DISCONNECTED:
1748 case SNDRV_PCM_STATE_SUSPENDED:
1749 return -EBADFD;
1750 }
1751 runtime->trigger_master = substream;
1752 return 0;
1753}
1754
1755static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1756{
1757 struct snd_pcm_runtime *runtime = substream->runtime;
1758 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1759 switch (runtime->status->state) {
1760 case SNDRV_PCM_STATE_PREPARED:
1761
1762 if (! snd_pcm_playback_empty(substream)) {
1763 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1764 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1765 } else {
1766 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1767 }
1768 break;
1769 case SNDRV_PCM_STATE_RUNNING:
1770 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1771 break;
1772 case SNDRV_PCM_STATE_XRUN:
1773 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1774 break;
1775 default:
1776 break;
1777 }
1778 } else {
1779
1780 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1781 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1782 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1783 snd_pcm_do_stop(substream, new_state);
1784 snd_pcm_post_stop(substream, new_state);
1785 }
1786 }
1787
1788 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1789 runtime->trigger_master == substream &&
1790 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1791 return substream->ops->trigger(substream,
1792 SNDRV_PCM_TRIGGER_DRAIN);
1793
1794 return 0;
1795}
1796
1797static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1798{
1799}
1800
1801static const struct action_ops snd_pcm_action_drain_init = {
1802 .pre_action = snd_pcm_pre_drain_init,
1803 .do_action = snd_pcm_do_drain_init,
1804 .post_action = snd_pcm_post_drain_init
1805};
1806
1807
1808
1809
1810
1811
1812
1813
1814static int snd_pcm_drain(struct snd_pcm_substream *substream,
1815 struct file *file)
1816{
1817 struct snd_card *card;
1818 struct snd_pcm_runtime *runtime;
1819 struct snd_pcm_substream *s;
1820 struct snd_pcm_group *group;
1821 wait_queue_entry_t wait;
1822 int result = 0;
1823 int nonblock = 0;
1824
1825 card = substream->pcm->card;
1826 runtime = substream->runtime;
1827
1828 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1829 return -EBADFD;
1830
1831 if (file) {
1832 if (file->f_flags & O_NONBLOCK)
1833 nonblock = 1;
1834 } else if (substream->f_flags & O_NONBLOCK)
1835 nonblock = 1;
1836
1837 snd_pcm_stream_lock_irq(substream);
1838
1839 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1840 snd_pcm_pause(substream, 0);
1841
1842
1843 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1844 if (result < 0)
1845 goto unlock;
1846
1847 if (nonblock) {
1848 result = -EAGAIN;
1849 goto unlock;
1850 }
1851
1852 for (;;) {
1853 long tout;
1854 struct snd_pcm_runtime *to_check;
1855 if (signal_pending(current)) {
1856 result = -ERESTARTSYS;
1857 break;
1858 }
1859
1860 to_check = NULL;
1861 group = snd_pcm_stream_group_ref(substream);
1862 snd_pcm_group_for_each_entry(s, substream) {
1863 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1864 continue;
1865 runtime = s->runtime;
1866 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1867 to_check = runtime;
1868 break;
1869 }
1870 }
1871 snd_pcm_group_unref(group, substream);
1872 if (!to_check)
1873 break;
1874 init_waitqueue_entry(&wait, current);
1875 set_current_state(TASK_INTERRUPTIBLE);
1876 add_wait_queue(&to_check->sleep, &wait);
1877 snd_pcm_stream_unlock_irq(substream);
1878 if (runtime->no_period_wakeup)
1879 tout = MAX_SCHEDULE_TIMEOUT;
1880 else {
1881 tout = 10;
1882 if (runtime->rate) {
1883 long t = runtime->period_size * 2 / runtime->rate;
1884 tout = max(t, tout);
1885 }
1886 tout = msecs_to_jiffies(tout * 1000);
1887 }
1888 tout = schedule_timeout(tout);
1889
1890 snd_pcm_stream_lock_irq(substream);
1891 group = snd_pcm_stream_group_ref(substream);
1892 snd_pcm_group_for_each_entry(s, substream) {
1893 if (s->runtime == to_check) {
1894 remove_wait_queue(&to_check->sleep, &wait);
1895 break;
1896 }
1897 }
1898 snd_pcm_group_unref(group, substream);
1899
1900 if (card->shutdown) {
1901 result = -ENODEV;
1902 break;
1903 }
1904 if (tout == 0) {
1905 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1906 result = -ESTRPIPE;
1907 else {
1908 dev_dbg(substream->pcm->card->dev,
1909 "playback drain error (DMA or IRQ trouble?)\n");
1910 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1911 result = -EIO;
1912 }
1913 break;
1914 }
1915 }
1916
1917 unlock:
1918 snd_pcm_stream_unlock_irq(substream);
1919
1920 return result;
1921}
1922
1923
1924
1925
1926
1927
1928static int snd_pcm_drop(struct snd_pcm_substream *substream)
1929{
1930 struct snd_pcm_runtime *runtime;
1931 int result = 0;
1932
1933 if (PCM_RUNTIME_CHECK(substream))
1934 return -ENXIO;
1935 runtime = substream->runtime;
1936
1937 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1938 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1939 return -EBADFD;
1940
1941 snd_pcm_stream_lock_irq(substream);
1942
1943 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1944 snd_pcm_pause(substream, 0);
1945
1946 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1947
1948 snd_pcm_stream_unlock_irq(substream);
1949
1950 return result;
1951}
1952
1953
1954static bool is_pcm_file(struct file *file)
1955{
1956 struct inode *inode = file_inode(file);
1957 struct snd_pcm *pcm;
1958 unsigned int minor;
1959
1960 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1961 return false;
1962 minor = iminor(inode);
1963 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
1964 if (!pcm)
1965 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1966 if (!pcm)
1967 return false;
1968 snd_card_unref(pcm->card);
1969 return true;
1970}
1971
1972
1973
1974
1975static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1976{
1977 int res = 0;
1978 struct snd_pcm_file *pcm_file;
1979 struct snd_pcm_substream *substream1;
1980 struct snd_pcm_group *group, *target_group;
1981 bool nonatomic = substream->pcm->nonatomic;
1982 struct fd f = fdget(fd);
1983
1984 if (!f.file)
1985 return -EBADFD;
1986 if (!is_pcm_file(f.file)) {
1987 res = -EBADFD;
1988 goto _badf;
1989 }
1990 pcm_file = f.file->private_data;
1991 substream1 = pcm_file->substream;
1992 group = kzalloc(sizeof(*group), GFP_KERNEL);
1993 if (!group) {
1994 res = -ENOMEM;
1995 goto _nolock;
1996 }
1997 snd_pcm_group_init(group);
1998
1999 down_write(&snd_pcm_link_rwsem);
2000 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
2001 substream->runtime->status->state != substream1->runtime->status->state ||
2002 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
2003 res = -EBADFD;
2004 goto _end;
2005 }
2006 if (snd_pcm_stream_linked(substream1)) {
2007 res = -EALREADY;
2008 goto _end;
2009 }
2010
2011 snd_pcm_stream_lock_irq(substream);
2012 if (!snd_pcm_stream_linked(substream)) {
2013 snd_pcm_group_assign(substream, group);
2014 group = NULL;
2015 }
2016 target_group = substream->group;
2017 snd_pcm_stream_unlock_irq(substream);
2018
2019 snd_pcm_group_lock_irq(target_group, nonatomic);
2020 snd_pcm_stream_lock(substream1);
2021 snd_pcm_group_assign(substream1, target_group);
2022 refcount_inc(&target_group->refs);
2023 snd_pcm_stream_unlock(substream1);
2024 snd_pcm_group_unlock_irq(target_group, nonatomic);
2025 _end:
2026 up_write(&snd_pcm_link_rwsem);
2027 _nolock:
2028 kfree(group);
2029 _badf:
2030 fdput(f);
2031 return res;
2032}
2033
2034static void relink_to_local(struct snd_pcm_substream *substream)
2035{
2036 snd_pcm_stream_lock(substream);
2037 snd_pcm_group_assign(substream, &substream->self_group);
2038 snd_pcm_stream_unlock(substream);
2039}
2040
2041static int snd_pcm_unlink(struct snd_pcm_substream *substream)
2042{
2043 struct snd_pcm_group *group;
2044 bool nonatomic = substream->pcm->nonatomic;
2045 bool do_free = false;
2046 int res = 0;
2047
2048 down_write(&snd_pcm_link_rwsem);
2049
2050 if (!snd_pcm_stream_linked(substream)) {
2051 res = -EALREADY;
2052 goto _end;
2053 }
2054
2055 group = substream->group;
2056 snd_pcm_group_lock_irq(group, nonatomic);
2057
2058 relink_to_local(substream);
2059 refcount_dec(&group->refs);
2060
2061
2062 if (list_is_singular(&group->substreams)) {
2063 relink_to_local(list_first_entry(&group->substreams,
2064 struct snd_pcm_substream,
2065 link_list));
2066 do_free = refcount_dec_and_test(&group->refs);
2067 }
2068
2069 snd_pcm_group_unlock_irq(group, nonatomic);
2070 if (do_free)
2071 kfree(group);
2072
2073 _end:
2074 up_write(&snd_pcm_link_rwsem);
2075 return res;
2076}
2077
2078
2079
2080
2081static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
2082 struct snd_pcm_hw_rule *rule)
2083{
2084 struct snd_interval t;
2085 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
2086 hw_param_interval_c(params, rule->deps[1]), &t);
2087 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2088}
2089
2090static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
2091 struct snd_pcm_hw_rule *rule)
2092{
2093 struct snd_interval t;
2094 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
2095 hw_param_interval_c(params, rule->deps[1]), &t);
2096 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2097}
2098
2099static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
2100 struct snd_pcm_hw_rule *rule)
2101{
2102 struct snd_interval t;
2103 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
2104 hw_param_interval_c(params, rule->deps[1]),
2105 (unsigned long) rule->private, &t);
2106 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2107}
2108
2109static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
2110 struct snd_pcm_hw_rule *rule)
2111{
2112 struct snd_interval t;
2113 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
2114 (unsigned long) rule->private,
2115 hw_param_interval_c(params, rule->deps[1]), &t);
2116 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2117}
2118
2119static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
2120 struct snd_pcm_hw_rule *rule)
2121{
2122 unsigned int k;
2123 const struct snd_interval *i =
2124 hw_param_interval_c(params, rule->deps[0]);
2125 struct snd_mask m;
2126 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
2127 snd_mask_any(&m);
2128 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2129 int bits;
2130 if (! snd_mask_test(mask, k))
2131 continue;
2132 bits = snd_pcm_format_physical_width(k);
2133 if (bits <= 0)
2134 continue;
2135 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
2136 snd_mask_reset(&m, k);
2137 }
2138 return snd_mask_refine(mask, &m);
2139}
2140
2141static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
2142 struct snd_pcm_hw_rule *rule)
2143{
2144 struct snd_interval t;
2145 unsigned int k;
2146 t.min = UINT_MAX;
2147 t.max = 0;
2148 t.openmin = 0;
2149 t.openmax = 0;
2150 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2151 int bits;
2152 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
2153 continue;
2154 bits = snd_pcm_format_physical_width(k);
2155 if (bits <= 0)
2156 continue;
2157 if (t.min > (unsigned)bits)
2158 t.min = bits;
2159 if (t.max < (unsigned)bits)
2160 t.max = bits;
2161 }
2162 t.integer = 1;
2163 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2164}
2165
2166#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
2167#error "Change this table"
2168#endif
2169
2170static const unsigned int rates[] = {
2171 5512, 8000, 11025, 16000, 22050, 32000, 44100,
2172 48000, 64000, 88200, 96000, 176400, 192000, 352800, 384000
2173};
2174
2175const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
2176 .count = ARRAY_SIZE(rates),
2177 .list = rates,
2178};
2179
2180static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
2181 struct snd_pcm_hw_rule *rule)
2182{
2183 struct snd_pcm_hardware *hw = rule->private;
2184 return snd_interval_list(hw_param_interval(params, rule->var),
2185 snd_pcm_known_rates.count,
2186 snd_pcm_known_rates.list, hw->rates);
2187}
2188
2189static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2190 struct snd_pcm_hw_rule *rule)
2191{
2192 struct snd_interval t;
2193 struct snd_pcm_substream *substream = rule->private;
2194 t.min = 0;
2195 t.max = substream->buffer_bytes_max;
2196 t.openmin = 0;
2197 t.openmax = 0;
2198 t.integer = 1;
2199 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2200}
2201
2202int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
2203{
2204 struct snd_pcm_runtime *runtime = substream->runtime;
2205 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
2206 int k, err;
2207
2208 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2209 snd_mask_any(constrs_mask(constrs, k));
2210 }
2211
2212 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2213 snd_interval_any(constrs_interval(constrs, k));
2214 }
2215
2216 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2217 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2218 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2219 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2220 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2221
2222 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2223 snd_pcm_hw_rule_format, NULL,
2224 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2225 if (err < 0)
2226 return err;
2227 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2228 snd_pcm_hw_rule_sample_bits, NULL,
2229 SNDRV_PCM_HW_PARAM_FORMAT,
2230 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2231 if (err < 0)
2232 return err;
2233 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2234 snd_pcm_hw_rule_div, NULL,
2235 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2236 if (err < 0)
2237 return err;
2238 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2239 snd_pcm_hw_rule_mul, NULL,
2240 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2241 if (err < 0)
2242 return err;
2243 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2244 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2245 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2246 if (err < 0)
2247 return err;
2248 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2249 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2250 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2251 if (err < 0)
2252 return err;
2253 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2254 snd_pcm_hw_rule_div, NULL,
2255 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2256 if (err < 0)
2257 return err;
2258 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2259 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2260 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2261 if (err < 0)
2262 return err;
2263 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2264 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2265 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2266 if (err < 0)
2267 return err;
2268 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2269 snd_pcm_hw_rule_div, NULL,
2270 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2271 if (err < 0)
2272 return err;
2273 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2274 snd_pcm_hw_rule_div, NULL,
2275 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2276 if (err < 0)
2277 return err;
2278 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2279 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2280 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2281 if (err < 0)
2282 return err;
2283 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2284 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2285 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2286 if (err < 0)
2287 return err;
2288 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2289 snd_pcm_hw_rule_mul, NULL,
2290 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2291 if (err < 0)
2292 return err;
2293 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2294 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2295 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2296 if (err < 0)
2297 return err;
2298 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2299 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2300 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2301 if (err < 0)
2302 return err;
2303 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2304 snd_pcm_hw_rule_muldivk, (void*) 8,
2305 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2306 if (err < 0)
2307 return err;
2308 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2309 snd_pcm_hw_rule_muldivk, (void*) 8,
2310 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2311 if (err < 0)
2312 return err;
2313 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2314 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2315 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2316 if (err < 0)
2317 return err;
2318 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2319 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2320 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2321 if (err < 0)
2322 return err;
2323 return 0;
2324}
2325
2326int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2327{
2328 struct snd_pcm_runtime *runtime = substream->runtime;
2329 struct snd_pcm_hardware *hw = &runtime->hw;
2330 int err;
2331 unsigned int mask = 0;
2332
2333 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2334 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2335 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2336 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
2337 if (hw_support_mmap(substream)) {
2338 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2339 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2340 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2341 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2342 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2343 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2344 }
2345 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2346 if (err < 0)
2347 return err;
2348
2349 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2350 if (err < 0)
2351 return err;
2352
2353 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
2354 if (err < 0)
2355 return err;
2356
2357 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2358 hw->channels_min, hw->channels_max);
2359 if (err < 0)
2360 return err;
2361
2362 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2363 hw->rate_min, hw->rate_max);
2364 if (err < 0)
2365 return err;
2366
2367 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2368 hw->period_bytes_min, hw->period_bytes_max);
2369 if (err < 0)
2370 return err;
2371
2372 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2373 hw->periods_min, hw->periods_max);
2374 if (err < 0)
2375 return err;
2376
2377 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2378 hw->period_bytes_min, hw->buffer_bytes_max);
2379 if (err < 0)
2380 return err;
2381
2382 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2383 snd_pcm_hw_rule_buffer_bytes_max, substream,
2384 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2385 if (err < 0)
2386 return err;
2387
2388
2389 if (runtime->dma_bytes) {
2390 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2391 if (err < 0)
2392 return err;
2393 }
2394
2395 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2396 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2397 snd_pcm_hw_rule_rate, hw,
2398 SNDRV_PCM_HW_PARAM_RATE, -1);
2399 if (err < 0)
2400 return err;
2401 }
2402
2403
2404 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2405
2406 return 0;
2407}
2408
2409static void pcm_release_private(struct snd_pcm_substream *substream)
2410{
2411 if (snd_pcm_stream_linked(substream))
2412 snd_pcm_unlink(substream);
2413}
2414
2415void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2416{
2417 substream->ref_count--;
2418 if (substream->ref_count > 0)
2419 return;
2420
2421 snd_pcm_drop(substream);
2422 if (substream->hw_opened) {
2423 if (substream->ops->hw_free &&
2424 substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
2425 substream->ops->hw_free(substream);
2426 substream->ops->close(substream);
2427 substream->hw_opened = 0;
2428 }
2429 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2430 pm_qos_remove_request(&substream->latency_pm_qos_req);
2431 if (substream->pcm_release) {
2432 substream->pcm_release(substream);
2433 substream->pcm_release = NULL;
2434 }
2435 snd_pcm_detach_substream(substream);
2436}
2437EXPORT_SYMBOL(snd_pcm_release_substream);
2438
2439int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2440 struct file *file,
2441 struct snd_pcm_substream **rsubstream)
2442{
2443 struct snd_pcm_substream *substream;
2444 int err;
2445
2446 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2447 if (err < 0)
2448 return err;
2449 if (substream->ref_count > 1) {
2450 *rsubstream = substream;
2451 return 0;
2452 }
2453
2454 err = snd_pcm_hw_constraints_init(substream);
2455 if (err < 0) {
2456 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2457 goto error;
2458 }
2459
2460 if ((err = substream->ops->open(substream)) < 0)
2461 goto error;
2462
2463 substream->hw_opened = 1;
2464
2465 err = snd_pcm_hw_constraints_complete(substream);
2466 if (err < 0) {
2467 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2468 goto error;
2469 }
2470
2471 *rsubstream = substream;
2472 return 0;
2473
2474 error:
2475 snd_pcm_release_substream(substream);
2476 return err;
2477}
2478EXPORT_SYMBOL(snd_pcm_open_substream);
2479
2480static int snd_pcm_open_file(struct file *file,
2481 struct snd_pcm *pcm,
2482 int stream)
2483{
2484 struct snd_pcm_file *pcm_file;
2485 struct snd_pcm_substream *substream;
2486 int err;
2487
2488 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2489 if (err < 0)
2490 return err;
2491
2492 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2493 if (pcm_file == NULL) {
2494 snd_pcm_release_substream(substream);
2495 return -ENOMEM;
2496 }
2497 pcm_file->substream = substream;
2498 if (substream->ref_count == 1)
2499 substream->pcm_release = pcm_release_private;
2500 file->private_data = pcm_file;
2501
2502 return 0;
2503}
2504
2505static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2506{
2507 struct snd_pcm *pcm;
2508 int err = nonseekable_open(inode, file);
2509 if (err < 0)
2510 return err;
2511 pcm = snd_lookup_minor_data(iminor(inode),
2512 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2513 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2514 if (pcm)
2515 snd_card_unref(pcm->card);
2516 return err;
2517}
2518
2519static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2520{
2521 struct snd_pcm *pcm;
2522 int err = nonseekable_open(inode, file);
2523 if (err < 0)
2524 return err;
2525 pcm = snd_lookup_minor_data(iminor(inode),
2526 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2527 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2528 if (pcm)
2529 snd_card_unref(pcm->card);
2530 return err;
2531}
2532
2533static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2534{
2535 int err;
2536 wait_queue_entry_t wait;
2537
2538 if (pcm == NULL) {
2539 err = -ENODEV;
2540 goto __error1;
2541 }
2542 err = snd_card_file_add(pcm->card, file);
2543 if (err < 0)
2544 goto __error1;
2545 if (!try_module_get(pcm->card->module)) {
2546 err = -EFAULT;
2547 goto __error2;
2548 }
2549 init_waitqueue_entry(&wait, current);
2550 add_wait_queue(&pcm->open_wait, &wait);
2551 mutex_lock(&pcm->open_mutex);
2552 while (1) {
2553 err = snd_pcm_open_file(file, pcm, stream);
2554 if (err >= 0)
2555 break;
2556 if (err == -EAGAIN) {
2557 if (file->f_flags & O_NONBLOCK) {
2558 err = -EBUSY;
2559 break;
2560 }
2561 } else
2562 break;
2563 set_current_state(TASK_INTERRUPTIBLE);
2564 mutex_unlock(&pcm->open_mutex);
2565 schedule();
2566 mutex_lock(&pcm->open_mutex);
2567 if (pcm->card->shutdown) {
2568 err = -ENODEV;
2569 break;
2570 }
2571 if (signal_pending(current)) {
2572 err = -ERESTARTSYS;
2573 break;
2574 }
2575 }
2576 remove_wait_queue(&pcm->open_wait, &wait);
2577 mutex_unlock(&pcm->open_mutex);
2578 if (err < 0)
2579 goto __error;
2580 return err;
2581
2582 __error:
2583 module_put(pcm->card->module);
2584 __error2:
2585 snd_card_file_remove(pcm->card, file);
2586 __error1:
2587 return err;
2588}
2589
2590static int snd_pcm_release(struct inode *inode, struct file *file)
2591{
2592 struct snd_pcm *pcm;
2593 struct snd_pcm_substream *substream;
2594 struct snd_pcm_file *pcm_file;
2595
2596 pcm_file = file->private_data;
2597 substream = pcm_file->substream;
2598 if (snd_BUG_ON(!substream))
2599 return -ENXIO;
2600 pcm = substream->pcm;
2601 mutex_lock(&pcm->open_mutex);
2602 snd_pcm_release_substream(substream);
2603 kfree(pcm_file);
2604 mutex_unlock(&pcm->open_mutex);
2605 wake_up(&pcm->open_wait);
2606 module_put(pcm->card->module);
2607 snd_card_file_remove(pcm->card, file);
2608 return 0;
2609}
2610
2611
2612
2613
2614static int do_pcm_hwsync(struct snd_pcm_substream *substream)
2615{
2616 switch (substream->runtime->status->state) {
2617 case SNDRV_PCM_STATE_DRAINING:
2618 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2619 return -EBADFD;
2620
2621 case SNDRV_PCM_STATE_RUNNING:
2622 return snd_pcm_update_hw_ptr(substream);
2623 case SNDRV_PCM_STATE_PREPARED:
2624 case SNDRV_PCM_STATE_PAUSED:
2625 return 0;
2626 case SNDRV_PCM_STATE_SUSPENDED:
2627 return -ESTRPIPE;
2628 case SNDRV_PCM_STATE_XRUN:
2629 return -EPIPE;
2630 default:
2631 return -EBADFD;
2632 }
2633}
2634
2635
2636static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
2637 snd_pcm_uframes_t frames,
2638 snd_pcm_sframes_t avail)
2639{
2640 struct snd_pcm_runtime *runtime = substream->runtime;
2641 snd_pcm_sframes_t appl_ptr;
2642 int ret;
2643
2644 if (avail <= 0)
2645 return 0;
2646 if (frames > (snd_pcm_uframes_t)avail)
2647 frames = avail;
2648 appl_ptr = runtime->control->appl_ptr + frames;
2649 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2650 appl_ptr -= runtime->boundary;
2651 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
2652 return ret < 0 ? ret : frames;
2653}
2654
2655
2656static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
2657 snd_pcm_uframes_t frames,
2658 snd_pcm_sframes_t avail)
2659{
2660 struct snd_pcm_runtime *runtime = substream->runtime;
2661 snd_pcm_sframes_t appl_ptr;
2662 int ret;
2663
2664 if (avail <= 0)
2665 return 0;
2666 if (frames > (snd_pcm_uframes_t)avail)
2667 frames = avail;
2668 appl_ptr = runtime->control->appl_ptr - frames;
2669 if (appl_ptr < 0)
2670 appl_ptr += runtime->boundary;
2671 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
2672
2673
2674
2675
2676
2677 return ret < 0 ? 0 : frames;
2678}
2679
2680static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream,
2681 snd_pcm_uframes_t frames)
2682{
2683 snd_pcm_sframes_t ret;
2684
2685 if (frames == 0)
2686 return 0;
2687
2688 snd_pcm_stream_lock_irq(substream);
2689 ret = do_pcm_hwsync(substream);
2690 if (!ret)
2691 ret = rewind_appl_ptr(substream, frames,
2692 snd_pcm_hw_avail(substream));
2693 snd_pcm_stream_unlock_irq(substream);
2694 return ret;
2695}
2696
2697static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream,
2698 snd_pcm_uframes_t frames)
2699{
2700 snd_pcm_sframes_t ret;
2701
2702 if (frames == 0)
2703 return 0;
2704
2705 snd_pcm_stream_lock_irq(substream);
2706 ret = do_pcm_hwsync(substream);
2707 if (!ret)
2708 ret = forward_appl_ptr(substream, frames,
2709 snd_pcm_avail(substream));
2710 snd_pcm_stream_unlock_irq(substream);
2711 return ret;
2712}
2713
2714static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2715{
2716 int err;
2717
2718 snd_pcm_stream_lock_irq(substream);
2719 err = do_pcm_hwsync(substream);
2720 snd_pcm_stream_unlock_irq(substream);
2721 return err;
2722}
2723
2724static int snd_pcm_delay(struct snd_pcm_substream *substream,
2725 snd_pcm_sframes_t *delay)
2726{
2727 int err;
2728 snd_pcm_sframes_t n = 0;
2729
2730 snd_pcm_stream_lock_irq(substream);
2731 err = do_pcm_hwsync(substream);
2732 if (!err)
2733 n = snd_pcm_calc_delay(substream);
2734 snd_pcm_stream_unlock_irq(substream);
2735 if (!err)
2736 *delay = n;
2737 return err;
2738}
2739
2740static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2741 struct snd_pcm_sync_ptr __user *_sync_ptr)
2742{
2743 struct snd_pcm_runtime *runtime = substream->runtime;
2744 struct snd_pcm_sync_ptr sync_ptr;
2745 volatile struct snd_pcm_mmap_status *status;
2746 volatile struct snd_pcm_mmap_control *control;
2747 int err;
2748
2749 memset(&sync_ptr, 0, sizeof(sync_ptr));
2750 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2751 return -EFAULT;
2752 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2753 return -EFAULT;
2754 status = runtime->status;
2755 control = runtime->control;
2756 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2757 err = snd_pcm_hwsync(substream);
2758 if (err < 0)
2759 return err;
2760 }
2761 snd_pcm_stream_lock_irq(substream);
2762 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
2763 err = pcm_lib_apply_appl_ptr(substream,
2764 sync_ptr.c.control.appl_ptr);
2765 if (err < 0) {
2766 snd_pcm_stream_unlock_irq(substream);
2767 return err;
2768 }
2769 } else {
2770 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2771 }
2772 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2773 control->avail_min = sync_ptr.c.control.avail_min;
2774 else
2775 sync_ptr.c.control.avail_min = control->avail_min;
2776 sync_ptr.s.status.state = status->state;
2777 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2778 sync_ptr.s.status.tstamp = status->tstamp;
2779 sync_ptr.s.status.suspended_state = status->suspended_state;
2780 sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
2781 snd_pcm_stream_unlock_irq(substream);
2782 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2783 return -EFAULT;
2784 return 0;
2785}
2786
2787static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2788{
2789 struct snd_pcm_runtime *runtime = substream->runtime;
2790 int arg;
2791
2792 if (get_user(arg, _arg))
2793 return -EFAULT;
2794 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2795 return -EINVAL;
2796 runtime->tstamp_type = arg;
2797 return 0;
2798}
2799
2800static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream,
2801 struct snd_xferi __user *_xferi)
2802{
2803 struct snd_xferi xferi;
2804 struct snd_pcm_runtime *runtime = substream->runtime;
2805 snd_pcm_sframes_t result;
2806
2807 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2808 return -EBADFD;
2809 if (put_user(0, &_xferi->result))
2810 return -EFAULT;
2811 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2812 return -EFAULT;
2813 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2814 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2815 else
2816 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2817 __put_user(result, &_xferi->result);
2818 return result < 0 ? result : 0;
2819}
2820
2821static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
2822 struct snd_xfern __user *_xfern)
2823{
2824 struct snd_xfern xfern;
2825 struct snd_pcm_runtime *runtime = substream->runtime;
2826 void *bufs;
2827 snd_pcm_sframes_t result;
2828
2829 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2830 return -EBADFD;
2831 if (runtime->channels > 128)
2832 return -EINVAL;
2833 if (put_user(0, &_xfern->result))
2834 return -EFAULT;
2835 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2836 return -EFAULT;
2837
2838 bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
2839 if (IS_ERR(bufs))
2840 return PTR_ERR(bufs);
2841 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2842 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2843 else
2844 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2845 kfree(bufs);
2846 __put_user(result, &_xfern->result);
2847 return result < 0 ? result : 0;
2848}
2849
2850static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream,
2851 snd_pcm_uframes_t __user *_frames)
2852{
2853 snd_pcm_uframes_t frames;
2854 snd_pcm_sframes_t result;
2855
2856 if (get_user(frames, _frames))
2857 return -EFAULT;
2858 if (put_user(0, _frames))
2859 return -EFAULT;
2860 result = snd_pcm_rewind(substream, frames);
2861 __put_user(result, _frames);
2862 return result < 0 ? result : 0;
2863}
2864
2865static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream,
2866 snd_pcm_uframes_t __user *_frames)
2867{
2868 snd_pcm_uframes_t frames;
2869 snd_pcm_sframes_t result;
2870
2871 if (get_user(frames, _frames))
2872 return -EFAULT;
2873 if (put_user(0, _frames))
2874 return -EFAULT;
2875 result = snd_pcm_forward(substream, frames);
2876 __put_user(result, _frames);
2877 return result < 0 ? result : 0;
2878}
2879
2880static int snd_pcm_common_ioctl(struct file *file,
2881 struct snd_pcm_substream *substream,
2882 unsigned int cmd, void __user *arg)
2883{
2884 struct snd_pcm_file *pcm_file = file->private_data;
2885 int res;
2886
2887 if (PCM_RUNTIME_CHECK(substream))
2888 return -ENXIO;
2889
2890 res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0);
2891 if (res < 0)
2892 return res;
2893
2894 switch (cmd) {
2895 case SNDRV_PCM_IOCTL_PVERSION:
2896 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2897 case SNDRV_PCM_IOCTL_INFO:
2898 return snd_pcm_info_user(substream, arg);
2899 case SNDRV_PCM_IOCTL_TSTAMP:
2900 return 0;
2901 case SNDRV_PCM_IOCTL_TTSTAMP:
2902 return snd_pcm_tstamp(substream, arg);
2903 case SNDRV_PCM_IOCTL_USER_PVERSION:
2904 if (get_user(pcm_file->user_pversion,
2905 (unsigned int __user *)arg))
2906 return -EFAULT;
2907 return 0;
2908 case SNDRV_PCM_IOCTL_HW_REFINE:
2909 return snd_pcm_hw_refine_user(substream, arg);
2910 case SNDRV_PCM_IOCTL_HW_PARAMS:
2911 return snd_pcm_hw_params_user(substream, arg);
2912 case SNDRV_PCM_IOCTL_HW_FREE:
2913 return snd_pcm_hw_free(substream);
2914 case SNDRV_PCM_IOCTL_SW_PARAMS:
2915 return snd_pcm_sw_params_user(substream, arg);
2916 case SNDRV_PCM_IOCTL_STATUS:
2917 return snd_pcm_status_user(substream, arg, false);
2918 case SNDRV_PCM_IOCTL_STATUS_EXT:
2919 return snd_pcm_status_user(substream, arg, true);
2920 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2921 return snd_pcm_channel_info_user(substream, arg);
2922 case SNDRV_PCM_IOCTL_PREPARE:
2923 return snd_pcm_prepare(substream, file);
2924 case SNDRV_PCM_IOCTL_RESET:
2925 return snd_pcm_reset(substream);
2926 case SNDRV_PCM_IOCTL_START:
2927 return snd_pcm_start_lock_irq(substream);
2928 case SNDRV_PCM_IOCTL_LINK:
2929 return snd_pcm_link(substream, (int)(unsigned long) arg);
2930 case SNDRV_PCM_IOCTL_UNLINK:
2931 return snd_pcm_unlink(substream);
2932 case SNDRV_PCM_IOCTL_RESUME:
2933 return snd_pcm_resume(substream);
2934 case SNDRV_PCM_IOCTL_XRUN:
2935 return snd_pcm_xrun(substream);
2936 case SNDRV_PCM_IOCTL_HWSYNC:
2937 return snd_pcm_hwsync(substream);
2938 case SNDRV_PCM_IOCTL_DELAY:
2939 {
2940 snd_pcm_sframes_t delay;
2941 snd_pcm_sframes_t __user *res = arg;
2942 int err;
2943
2944 err = snd_pcm_delay(substream, &delay);
2945 if (err)
2946 return err;
2947 if (put_user(delay, res))
2948 return -EFAULT;
2949 return 0;
2950 }
2951 case SNDRV_PCM_IOCTL_SYNC_PTR:
2952 return snd_pcm_sync_ptr(substream, arg);
2953#ifdef CONFIG_SND_SUPPORT_OLD_API
2954 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2955 return snd_pcm_hw_refine_old_user(substream, arg);
2956 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2957 return snd_pcm_hw_params_old_user(substream, arg);
2958#endif
2959 case SNDRV_PCM_IOCTL_DRAIN:
2960 return snd_pcm_drain(substream, file);
2961 case SNDRV_PCM_IOCTL_DROP:
2962 return snd_pcm_drop(substream);
2963 case SNDRV_PCM_IOCTL_PAUSE:
2964 return snd_pcm_action_lock_irq(&snd_pcm_action_pause,
2965 substream,
2966 (int)(unsigned long)arg);
2967 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2968 case SNDRV_PCM_IOCTL_READI_FRAMES:
2969 return snd_pcm_xferi_frames_ioctl(substream, arg);
2970 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2971 case SNDRV_PCM_IOCTL_READN_FRAMES:
2972 return snd_pcm_xfern_frames_ioctl(substream, arg);
2973 case SNDRV_PCM_IOCTL_REWIND:
2974 return snd_pcm_rewind_ioctl(substream, arg);
2975 case SNDRV_PCM_IOCTL_FORWARD:
2976 return snd_pcm_forward_ioctl(substream, arg);
2977 }
2978 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2979 return -ENOTTY;
2980}
2981
2982static long snd_pcm_ioctl(struct file *file, unsigned int cmd,
2983 unsigned long arg)
2984{
2985 struct snd_pcm_file *pcm_file;
2986
2987 pcm_file = file->private_data;
2988
2989 if (((cmd >> 8) & 0xff) != 'A')
2990 return -ENOTTY;
2991
2992 return snd_pcm_common_ioctl(file, pcm_file->substream, cmd,
2993 (void __user *)arg);
2994}
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
3007 unsigned int cmd, void *arg)
3008{
3009 snd_pcm_uframes_t *frames = arg;
3010 snd_pcm_sframes_t result;
3011
3012 switch (cmd) {
3013 case SNDRV_PCM_IOCTL_FORWARD:
3014 {
3015
3016 if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
3017 return -EINVAL;
3018 result = snd_pcm_forward(substream, *frames);
3019 return result < 0 ? result : 0;
3020 }
3021 case SNDRV_PCM_IOCTL_HW_PARAMS:
3022 return snd_pcm_hw_params(substream, arg);
3023 case SNDRV_PCM_IOCTL_SW_PARAMS:
3024 return snd_pcm_sw_params(substream, arg);
3025 case SNDRV_PCM_IOCTL_PREPARE:
3026 return snd_pcm_prepare(substream, NULL);
3027 case SNDRV_PCM_IOCTL_START:
3028 return snd_pcm_start_lock_irq(substream);
3029 case SNDRV_PCM_IOCTL_DRAIN:
3030 return snd_pcm_drain(substream, NULL);
3031 case SNDRV_PCM_IOCTL_DROP:
3032 return snd_pcm_drop(substream);
3033 case SNDRV_PCM_IOCTL_DELAY:
3034 return snd_pcm_delay(substream, frames);
3035 default:
3036 return -EINVAL;
3037 }
3038}
3039EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3040
3041static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3042 loff_t * offset)
3043{
3044 struct snd_pcm_file *pcm_file;
3045 struct snd_pcm_substream *substream;
3046 struct snd_pcm_runtime *runtime;
3047 snd_pcm_sframes_t result;
3048
3049 pcm_file = file->private_data;
3050 substream = pcm_file->substream;
3051 if (PCM_RUNTIME_CHECK(substream))
3052 return -ENXIO;
3053 runtime = substream->runtime;
3054 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3055 return -EBADFD;
3056 if (!frame_aligned(runtime, count))
3057 return -EINVAL;
3058 count = bytes_to_frames(runtime, count);
3059 result = snd_pcm_lib_read(substream, buf, count);
3060 if (result > 0)
3061 result = frames_to_bytes(runtime, result);
3062 return result;
3063}
3064
3065static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3066 size_t count, loff_t * offset)
3067{
3068 struct snd_pcm_file *pcm_file;
3069 struct snd_pcm_substream *substream;
3070 struct snd_pcm_runtime *runtime;
3071 snd_pcm_sframes_t result;
3072
3073 pcm_file = file->private_data;
3074 substream = pcm_file->substream;
3075 if (PCM_RUNTIME_CHECK(substream))
3076 return -ENXIO;
3077 runtime = substream->runtime;
3078 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3079 return -EBADFD;
3080 if (!frame_aligned(runtime, count))
3081 return -EINVAL;
3082 count = bytes_to_frames(runtime, count);
3083 result = snd_pcm_lib_write(substream, buf, count);
3084 if (result > 0)
3085 result = frames_to_bytes(runtime, result);
3086 return result;
3087}
3088
3089static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
3090{
3091 struct snd_pcm_file *pcm_file;
3092 struct snd_pcm_substream *substream;
3093 struct snd_pcm_runtime *runtime;
3094 snd_pcm_sframes_t result;
3095 unsigned long i;
3096 void __user **bufs;
3097 snd_pcm_uframes_t frames;
3098
3099 pcm_file = iocb->ki_filp->private_data;
3100 substream = pcm_file->substream;
3101 if (PCM_RUNTIME_CHECK(substream))
3102 return -ENXIO;
3103 runtime = substream->runtime;
3104 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3105 return -EBADFD;
3106 if (!iter_is_iovec(to))
3107 return -EINVAL;
3108 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
3109 return -EINVAL;
3110 if (!frame_aligned(runtime, to->iov->iov_len))
3111 return -EINVAL;
3112 frames = bytes_to_samples(runtime, to->iov->iov_len);
3113 bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL);
3114 if (bufs == NULL)
3115 return -ENOMEM;
3116 for (i = 0; i < to->nr_segs; ++i)
3117 bufs[i] = to->iov[i].iov_base;
3118 result = snd_pcm_lib_readv(substream, bufs, frames);
3119 if (result > 0)
3120 result = frames_to_bytes(runtime, result);
3121 kfree(bufs);
3122 return result;
3123}
3124
3125static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
3126{
3127 struct snd_pcm_file *pcm_file;
3128 struct snd_pcm_substream *substream;
3129 struct snd_pcm_runtime *runtime;
3130 snd_pcm_sframes_t result;
3131 unsigned long i;
3132 void __user **bufs;
3133 snd_pcm_uframes_t frames;
3134
3135 pcm_file = iocb->ki_filp->private_data;
3136 substream = pcm_file->substream;
3137 if (PCM_RUNTIME_CHECK(substream))
3138 return -ENXIO;
3139 runtime = substream->runtime;
3140 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3141 return -EBADFD;
3142 if (!iter_is_iovec(from))
3143 return -EINVAL;
3144 if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
3145 !frame_aligned(runtime, from->iov->iov_len))
3146 return -EINVAL;
3147 frames = bytes_to_samples(runtime, from->iov->iov_len);
3148 bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL);
3149 if (bufs == NULL)
3150 return -ENOMEM;
3151 for (i = 0; i < from->nr_segs; ++i)
3152 bufs[i] = from->iov[i].iov_base;
3153 result = snd_pcm_lib_writev(substream, bufs, frames);
3154 if (result > 0)
3155 result = frames_to_bytes(runtime, result);
3156 kfree(bufs);
3157 return result;
3158}
3159
3160static __poll_t snd_pcm_poll(struct file *file, poll_table *wait)
3161{
3162 struct snd_pcm_file *pcm_file;
3163 struct snd_pcm_substream *substream;
3164 struct snd_pcm_runtime *runtime;
3165 __poll_t mask, ok;
3166 snd_pcm_uframes_t avail;
3167
3168 pcm_file = file->private_data;
3169
3170 substream = pcm_file->substream;
3171 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3172 ok = EPOLLOUT | EPOLLWRNORM;
3173 else
3174 ok = EPOLLIN | EPOLLRDNORM;
3175 if (PCM_RUNTIME_CHECK(substream))
3176 return ok | EPOLLERR;
3177
3178 runtime = substream->runtime;
3179 poll_wait(file, &runtime->sleep, wait);
3180
3181 mask = 0;
3182 snd_pcm_stream_lock_irq(substream);
3183 avail = snd_pcm_avail(substream);
3184 switch (runtime->status->state) {
3185 case SNDRV_PCM_STATE_RUNNING:
3186 case SNDRV_PCM_STATE_PREPARED:
3187 case SNDRV_PCM_STATE_PAUSED:
3188 if (avail >= runtime->control->avail_min)
3189 mask = ok;
3190 break;
3191 case SNDRV_PCM_STATE_DRAINING:
3192 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
3193 mask = ok;
3194 if (!avail)
3195 mask |= EPOLLERR;
3196 }
3197 break;
3198 default:
3199 mask = ok | EPOLLERR;
3200 break;
3201 }
3202 snd_pcm_stream_unlock_irq(substream);
3203 return mask;
3204}
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3215
3216
3217
3218static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf)
3219{
3220 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3221 struct snd_pcm_runtime *runtime;
3222
3223 if (substream == NULL)
3224 return VM_FAULT_SIGBUS;
3225 runtime = substream->runtime;
3226 vmf->page = virt_to_page(runtime->status);
3227 get_page(vmf->page);
3228 return 0;
3229}
3230
3231static const struct vm_operations_struct snd_pcm_vm_ops_status =
3232{
3233 .fault = snd_pcm_mmap_status_fault,
3234};
3235
3236static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3237 struct vm_area_struct *area)
3238{
3239 long size;
3240 if (!(area->vm_flags & VM_READ))
3241 return -EINVAL;
3242 size = area->vm_end - area->vm_start;
3243 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3244 return -EINVAL;
3245 area->vm_ops = &snd_pcm_vm_ops_status;
3246 area->vm_private_data = substream;
3247 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3248 return 0;
3249}
3250
3251
3252
3253
3254static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf)
3255{
3256 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3257 struct snd_pcm_runtime *runtime;
3258
3259 if (substream == NULL)
3260 return VM_FAULT_SIGBUS;
3261 runtime = substream->runtime;
3262 vmf->page = virt_to_page(runtime->control);
3263 get_page(vmf->page);
3264 return 0;
3265}
3266
3267static const struct vm_operations_struct snd_pcm_vm_ops_control =
3268{
3269 .fault = snd_pcm_mmap_control_fault,
3270};
3271
3272static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3273 struct vm_area_struct *area)
3274{
3275 long size;
3276 if (!(area->vm_flags & VM_READ))
3277 return -EINVAL;
3278 size = area->vm_end - area->vm_start;
3279 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3280 return -EINVAL;
3281 area->vm_ops = &snd_pcm_vm_ops_control;
3282 area->vm_private_data = substream;
3283 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3284 return 0;
3285}
3286
3287static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
3288{
3289 if (pcm_file->no_compat_mmap)
3290 return false;
3291
3292
3293
3294
3295 if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) &&
3296 (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR))
3297 return false;
3298 return true;
3299}
3300
3301static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
3302{
3303 if (pcm_file->no_compat_mmap)
3304 return false;
3305
3306
3307
3308
3309 if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)
3310 return false;
3311 return true;
3312}
3313
3314#else
3315
3316
3317
3318#define pcm_status_mmap_allowed(pcm_file) false
3319#define pcm_control_mmap_allowed(pcm_file) false
3320
3321static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3322 struct vm_area_struct *area)
3323{
3324 return -ENXIO;
3325}
3326static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3327 struct vm_area_struct *area)
3328{
3329 return -ENXIO;
3330}
3331#endif
3332
3333static inline struct page *
3334snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3335{
3336 void *vaddr = substream->runtime->dma_area + ofs;
3337 return virt_to_page(vaddr);
3338}
3339
3340
3341
3342
3343static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf)
3344{
3345 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3346 struct snd_pcm_runtime *runtime;
3347 unsigned long offset;
3348 struct page * page;
3349 size_t dma_bytes;
3350
3351 if (substream == NULL)
3352 return VM_FAULT_SIGBUS;
3353 runtime = substream->runtime;
3354 offset = vmf->pgoff << PAGE_SHIFT;
3355 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3356 if (offset > dma_bytes - PAGE_SIZE)
3357 return VM_FAULT_SIGBUS;
3358 if (substream->ops->page)
3359 page = substream->ops->page(substream, offset);
3360 else
3361 page = snd_pcm_default_page_ops(substream, offset);
3362 if (!page)
3363 return VM_FAULT_SIGBUS;
3364 get_page(page);
3365 vmf->page = page;
3366 return 0;
3367}
3368
3369static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3370 .open = snd_pcm_mmap_data_open,
3371 .close = snd_pcm_mmap_data_close,
3372};
3373
3374static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3375 .open = snd_pcm_mmap_data_open,
3376 .close = snd_pcm_mmap_data_close,
3377 .fault = snd_pcm_mmap_data_fault,
3378};
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3393 struct vm_area_struct *area)
3394{
3395 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3396#ifdef CONFIG_GENERIC_ALLOCATOR
3397 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3398 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3399 return remap_pfn_range(area, area->vm_start,
3400 substream->dma_buffer.addr >> PAGE_SHIFT,
3401 area->vm_end - area->vm_start, area->vm_page_prot);
3402 }
3403#endif
3404#ifndef CONFIG_X86
3405 if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page &&
3406 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3407 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3408 area,
3409 substream->runtime->dma_area,
3410 substream->runtime->dma_addr,
3411 substream->runtime->dma_bytes);
3412#endif
3413
3414 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3415 return 0;
3416}
3417EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3418
3419
3420
3421
3422#if SNDRV_PCM_INFO_MMAP_IOMEM
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3433 struct vm_area_struct *area)
3434{
3435 struct snd_pcm_runtime *runtime = substream->runtime;
3436
3437 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3438 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3439}
3440EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3441#endif
3442
3443
3444
3445
3446int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3447 struct vm_area_struct *area)
3448{
3449 struct snd_pcm_runtime *runtime;
3450 long size;
3451 unsigned long offset;
3452 size_t dma_bytes;
3453 int err;
3454
3455 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3456 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3457 return -EINVAL;
3458 } else {
3459 if (!(area->vm_flags & VM_READ))
3460 return -EINVAL;
3461 }
3462 runtime = substream->runtime;
3463 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3464 return -EBADFD;
3465 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3466 return -ENXIO;
3467 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3468 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3469 return -EINVAL;
3470 size = area->vm_end - area->vm_start;
3471 offset = area->vm_pgoff << PAGE_SHIFT;
3472 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3473 if ((size_t)size > dma_bytes)
3474 return -EINVAL;
3475 if (offset > dma_bytes - size)
3476 return -EINVAL;
3477
3478 area->vm_ops = &snd_pcm_vm_ops_data;
3479 area->vm_private_data = substream;
3480 if (substream->ops->mmap)
3481 err = substream->ops->mmap(substream, area);
3482 else
3483 err = snd_pcm_lib_default_mmap(substream, area);
3484 if (!err)
3485 atomic_inc(&substream->mmap_count);
3486 return err;
3487}
3488EXPORT_SYMBOL(snd_pcm_mmap_data);
3489
3490static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3491{
3492 struct snd_pcm_file * pcm_file;
3493 struct snd_pcm_substream *substream;
3494 unsigned long offset;
3495
3496 pcm_file = file->private_data;
3497 substream = pcm_file->substream;
3498 if (PCM_RUNTIME_CHECK(substream))
3499 return -ENXIO;
3500
3501 offset = area->vm_pgoff << PAGE_SHIFT;
3502 switch (offset) {
3503 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3504 if (!pcm_status_mmap_allowed(pcm_file))
3505 return -ENXIO;
3506 return snd_pcm_mmap_status(substream, file, area);
3507 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3508 if (!pcm_control_mmap_allowed(pcm_file))
3509 return -ENXIO;
3510 return snd_pcm_mmap_control(substream, file, area);
3511 default:
3512 return snd_pcm_mmap_data(substream, file, area);
3513 }
3514 return 0;
3515}
3516
3517static int snd_pcm_fasync(int fd, struct file * file, int on)
3518{
3519 struct snd_pcm_file * pcm_file;
3520 struct snd_pcm_substream *substream;
3521 struct snd_pcm_runtime *runtime;
3522
3523 pcm_file = file->private_data;
3524 substream = pcm_file->substream;
3525 if (PCM_RUNTIME_CHECK(substream))
3526 return -ENXIO;
3527 runtime = substream->runtime;
3528 return fasync_helper(fd, file, on, &runtime->fasync);
3529}
3530
3531
3532
3533
3534#ifdef CONFIG_COMPAT
3535#include "pcm_compat.c"
3536#else
3537#define snd_pcm_ioctl_compat NULL
3538#endif
3539
3540
3541
3542
3543
3544#ifdef CONFIG_SND_SUPPORT_OLD_API
3545#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3546#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3547
3548static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3549 struct snd_pcm_hw_params_old *oparams)
3550{
3551 unsigned int i;
3552
3553 memset(params, 0, sizeof(*params));
3554 params->flags = oparams->flags;
3555 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3556 params->masks[i].bits[0] = oparams->masks[i];
3557 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3558 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3559 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3560 params->info = oparams->info;
3561 params->msbits = oparams->msbits;
3562 params->rate_num = oparams->rate_num;
3563 params->rate_den = oparams->rate_den;
3564 params->fifo_size = oparams->fifo_size;
3565}
3566
3567static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3568 struct snd_pcm_hw_params *params)
3569{
3570 unsigned int i;
3571
3572 memset(oparams, 0, sizeof(*oparams));
3573 oparams->flags = params->flags;
3574 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3575 oparams->masks[i] = params->masks[i].bits[0];
3576 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3577 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3578 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3579 oparams->info = params->info;
3580 oparams->msbits = params->msbits;
3581 oparams->rate_num = params->rate_num;
3582 oparams->rate_den = params->rate_den;
3583 oparams->fifo_size = params->fifo_size;
3584}
3585
3586static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3587 struct snd_pcm_hw_params_old __user * _oparams)
3588{
3589 struct snd_pcm_hw_params *params;
3590 struct snd_pcm_hw_params_old *oparams = NULL;
3591 int err;
3592
3593 params = kmalloc(sizeof(*params), GFP_KERNEL);
3594 if (!params)
3595 return -ENOMEM;
3596
3597 oparams = memdup_user(_oparams, sizeof(*oparams));
3598 if (IS_ERR(oparams)) {
3599 err = PTR_ERR(oparams);
3600 goto out;
3601 }
3602 snd_pcm_hw_convert_from_old_params(params, oparams);
3603 err = snd_pcm_hw_refine(substream, params);
3604 if (err < 0)
3605 goto out_old;
3606
3607 err = fixup_unreferenced_params(substream, params);
3608 if (err < 0)
3609 goto out_old;
3610
3611 snd_pcm_hw_convert_to_old_params(oparams, params);
3612 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3613 err = -EFAULT;
3614out_old:
3615 kfree(oparams);
3616out:
3617 kfree(params);
3618 return err;
3619}
3620
3621static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3622 struct snd_pcm_hw_params_old __user * _oparams)
3623{
3624 struct snd_pcm_hw_params *params;
3625 struct snd_pcm_hw_params_old *oparams = NULL;
3626 int err;
3627
3628 params = kmalloc(sizeof(*params), GFP_KERNEL);
3629 if (!params)
3630 return -ENOMEM;
3631
3632 oparams = memdup_user(_oparams, sizeof(*oparams));
3633 if (IS_ERR(oparams)) {
3634 err = PTR_ERR(oparams);
3635 goto out;
3636 }
3637
3638 snd_pcm_hw_convert_from_old_params(params, oparams);
3639 err = snd_pcm_hw_params(substream, params);
3640 if (err < 0)
3641 goto out_old;
3642
3643 snd_pcm_hw_convert_to_old_params(oparams, params);
3644 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3645 err = -EFAULT;
3646out_old:
3647 kfree(oparams);
3648out:
3649 kfree(params);
3650 return err;
3651}
3652#endif
3653
3654#ifndef CONFIG_MMU
3655static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3656 unsigned long addr,
3657 unsigned long len,
3658 unsigned long pgoff,
3659 unsigned long flags)
3660{
3661 struct snd_pcm_file *pcm_file = file->private_data;
3662 struct snd_pcm_substream *substream = pcm_file->substream;
3663 struct snd_pcm_runtime *runtime = substream->runtime;
3664 unsigned long offset = pgoff << PAGE_SHIFT;
3665
3666 switch (offset) {
3667 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3668 return (unsigned long)runtime->status;
3669 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3670 return (unsigned long)runtime->control;
3671 default:
3672 return (unsigned long)runtime->dma_area + offset;
3673 }
3674}
3675#else
3676# define snd_pcm_get_unmapped_area NULL
3677#endif
3678
3679
3680
3681
3682
3683const struct file_operations snd_pcm_f_ops[2] = {
3684 {
3685 .owner = THIS_MODULE,
3686 .write = snd_pcm_write,
3687 .write_iter = snd_pcm_writev,
3688 .open = snd_pcm_playback_open,
3689 .release = snd_pcm_release,
3690 .llseek = no_llseek,
3691 .poll = snd_pcm_poll,
3692 .unlocked_ioctl = snd_pcm_ioctl,
3693 .compat_ioctl = snd_pcm_ioctl_compat,
3694 .mmap = snd_pcm_mmap,
3695 .fasync = snd_pcm_fasync,
3696 .get_unmapped_area = snd_pcm_get_unmapped_area,
3697 },
3698 {
3699 .owner = THIS_MODULE,
3700 .read = snd_pcm_read,
3701 .read_iter = snd_pcm_readv,
3702 .open = snd_pcm_capture_open,
3703 .release = snd_pcm_release,
3704 .llseek = no_llseek,
3705 .poll = snd_pcm_poll,
3706 .unlocked_ioctl = snd_pcm_ioctl,
3707 .compat_ioctl = snd_pcm_ioctl_compat,
3708 .mmap = snd_pcm_mmap,
3709 .fasync = snd_pcm_fasync,
3710 .get_unmapped_area = snd_pcm_get_unmapped_area,
3711 }
3712};
3713