1
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5
6
7#include <linux/compat.h>
8#include <linux/mm.h>
9#include <linux/module.h>
10#include <linux/file.h>
11#include <linux/slab.h>
12#include <linux/sched/signal.h>
13#include <linux/time.h>
14#include <linux/pm_qos.h>
15#include <linux/io.h>
16#include <linux/dma-mapping.h>
17#include <linux/vmalloc.h>
18#include <sound/core.h>
19#include <sound/control.h>
20#include <sound/info.h>
21#include <sound/pcm.h>
22#include <sound/pcm_params.h>
23#include <sound/timer.h>
24#include <sound/minors.h>
25#include <linux/uio.h>
26#include <linux/delay.h>
27
28#include "pcm_local.h"
29
30#ifdef CONFIG_SND_DEBUG
31#define CREATE_TRACE_POINTS
32#include "pcm_param_trace.h"
33#else
34#define trace_hw_mask_param_enabled() 0
35#define trace_hw_interval_param_enabled() 0
36#define trace_hw_mask_param(substream, type, index, prev, curr)
37#define trace_hw_interval_param(substream, type, index, prev, curr)
38#endif
39
40
41
42
43
44struct snd_pcm_hw_params_old {
45 unsigned int flags;
46 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
47 SNDRV_PCM_HW_PARAM_ACCESS + 1];
48 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
49 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
50 unsigned int rmask;
51 unsigned int cmask;
52 unsigned int info;
53 unsigned int msbits;
54 unsigned int rate_num;
55 unsigned int rate_den;
56 snd_pcm_uframes_t fifo_size;
57 unsigned char reserved[64];
58};
59
60#ifdef CONFIG_SND_SUPPORT_OLD_API
61#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
62#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
63
64static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
66static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
68#endif
69static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
70
71
72
73
74
75static DECLARE_RWSEM(snd_pcm_link_rwsem);
76
77void snd_pcm_group_init(struct snd_pcm_group *group)
78{
79 spin_lock_init(&group->lock);
80 mutex_init(&group->mutex);
81 INIT_LIST_HEAD(&group->substreams);
82 refcount_set(&group->refs, 1);
83}
84
85
86#define DEFINE_PCM_GROUP_LOCK(action, mutex_action) \
87static void snd_pcm_group_ ## action(struct snd_pcm_group *group, bool nonatomic) \
88{ \
89 if (nonatomic) \
90 mutex_ ## mutex_action(&group->mutex); \
91 else \
92 spin_ ## action(&group->lock); \
93}
94
95DEFINE_PCM_GROUP_LOCK(lock, lock);
96DEFINE_PCM_GROUP_LOCK(unlock, unlock);
97DEFINE_PCM_GROUP_LOCK(lock_irq, lock);
98DEFINE_PCM_GROUP_LOCK(unlock_irq, unlock);
99
100
101
102
103
104
105
106
107
108void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
109{
110 snd_pcm_group_lock(&substream->self_group, substream->pcm->nonatomic);
111}
112EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
113
114
115
116
117
118
119
120void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
121{
122 snd_pcm_group_unlock(&substream->self_group, substream->pcm->nonatomic);
123}
124EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
125
126
127
128
129
130
131
132
133
134void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
135{
136 snd_pcm_group_lock_irq(&substream->self_group,
137 substream->pcm->nonatomic);
138}
139EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
140
141static void snd_pcm_stream_lock_nested(struct snd_pcm_substream *substream)
142{
143 struct snd_pcm_group *group = &substream->self_group;
144
145 if (substream->pcm->nonatomic)
146 mutex_lock_nested(&group->mutex, SINGLE_DEPTH_NESTING);
147 else
148 spin_lock_nested(&group->lock, SINGLE_DEPTH_NESTING);
149}
150
151
152
153
154
155
156
157void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
158{
159 snd_pcm_group_unlock_irq(&substream->self_group,
160 substream->pcm->nonatomic);
161}
162EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
163
164unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
165{
166 unsigned long flags = 0;
167 if (substream->pcm->nonatomic)
168 mutex_lock(&substream->self_group.mutex);
169 else
170 spin_lock_irqsave(&substream->self_group.lock, flags);
171 return flags;
172}
173EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
174
175
176
177
178
179
180
181
182void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
183 unsigned long flags)
184{
185 if (substream->pcm->nonatomic)
186 mutex_unlock(&substream->self_group.mutex);
187 else
188 spin_unlock_irqrestore(&substream->self_group.lock, flags);
189}
190EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
191
192
193static int snd_pcm_ops_ioctl(struct snd_pcm_substream *substream,
194 unsigned cmd, void *arg)
195{
196 if (substream->ops->ioctl)
197 return substream->ops->ioctl(substream, cmd, arg);
198 else
199 return snd_pcm_lib_ioctl(substream, cmd, arg);
200}
201
202int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
203{
204 struct snd_pcm *pcm = substream->pcm;
205 struct snd_pcm_str *pstr = substream->pstr;
206
207 memset(info, 0, sizeof(*info));
208 info->card = pcm->card->number;
209 info->device = pcm->device;
210 info->stream = substream->stream;
211 info->subdevice = substream->number;
212 strlcpy(info->id, pcm->id, sizeof(info->id));
213 strlcpy(info->name, pcm->name, sizeof(info->name));
214 info->dev_class = pcm->dev_class;
215 info->dev_subclass = pcm->dev_subclass;
216 info->subdevices_count = pstr->substream_count;
217 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
218 strlcpy(info->subname, substream->name, sizeof(info->subname));
219
220 return 0;
221}
222
223int snd_pcm_info_user(struct snd_pcm_substream *substream,
224 struct snd_pcm_info __user * _info)
225{
226 struct snd_pcm_info *info;
227 int err;
228
229 info = kmalloc(sizeof(*info), GFP_KERNEL);
230 if (! info)
231 return -ENOMEM;
232 err = snd_pcm_info(substream, info);
233 if (err >= 0) {
234 if (copy_to_user(_info, info, sizeof(*info)))
235 err = -EFAULT;
236 }
237 kfree(info);
238 return err;
239}
240
241
242#define PARAM_MASK_BIT(b) (1U << (__force int)(b))
243
244static bool hw_support_mmap(struct snd_pcm_substream *substream)
245{
246 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
247 return false;
248
249 if (substream->ops->mmap ||
250 (substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV &&
251 substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV_UC))
252 return true;
253
254 return dma_can_mmap(substream->dma_buffer.dev.dev);
255}
256
257static int constrain_mask_params(struct snd_pcm_substream *substream,
258 struct snd_pcm_hw_params *params)
259{
260 struct snd_pcm_hw_constraints *constrs =
261 &substream->runtime->hw_constraints;
262 struct snd_mask *m;
263 unsigned int k;
264 struct snd_mask old_mask;
265 int changed;
266
267 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
268 m = hw_param_mask(params, k);
269 if (snd_mask_empty(m))
270 return -EINVAL;
271
272
273 if (!(params->rmask & PARAM_MASK_BIT(k)))
274 continue;
275
276 if (trace_hw_mask_param_enabled())
277 old_mask = *m;
278
279 changed = snd_mask_refine(m, constrs_mask(constrs, k));
280 if (changed < 0)
281 return changed;
282 if (changed == 0)
283 continue;
284
285
286 trace_hw_mask_param(substream, k, 0, &old_mask, m);
287 params->cmask |= PARAM_MASK_BIT(k);
288 }
289
290 return 0;
291}
292
293static int constrain_interval_params(struct snd_pcm_substream *substream,
294 struct snd_pcm_hw_params *params)
295{
296 struct snd_pcm_hw_constraints *constrs =
297 &substream->runtime->hw_constraints;
298 struct snd_interval *i;
299 unsigned int k;
300 struct snd_interval old_interval;
301 int changed;
302
303 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
304 i = hw_param_interval(params, k);
305 if (snd_interval_empty(i))
306 return -EINVAL;
307
308
309 if (!(params->rmask & PARAM_MASK_BIT(k)))
310 continue;
311
312 if (trace_hw_interval_param_enabled())
313 old_interval = *i;
314
315 changed = snd_interval_refine(i, constrs_interval(constrs, k));
316 if (changed < 0)
317 return changed;
318 if (changed == 0)
319 continue;
320
321
322 trace_hw_interval_param(substream, k, 0, &old_interval, i);
323 params->cmask |= PARAM_MASK_BIT(k);
324 }
325
326 return 0;
327}
328
329static int constrain_params_by_rules(struct snd_pcm_substream *substream,
330 struct snd_pcm_hw_params *params)
331{
332 struct snd_pcm_hw_constraints *constrs =
333 &substream->runtime->hw_constraints;
334 unsigned int k;
335 unsigned int *rstamps;
336 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
337 unsigned int stamp;
338 struct snd_pcm_hw_rule *r;
339 unsigned int d;
340 struct snd_mask old_mask;
341 struct snd_interval old_interval;
342 bool again;
343 int changed, err = 0;
344
345
346
347
348
349
350
351 rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL);
352 if (!rstamps)
353 return -ENOMEM;
354
355
356
357
358
359
360
361
362
363
364 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
365 vstamps[k] = (params->rmask & PARAM_MASK_BIT(k)) ? 1 : 0;
366
367
368 stamp = 2;
369retry:
370
371 again = false;
372 for (k = 0; k < constrs->rules_num; k++) {
373 r = &constrs->rules[k];
374
375
376
377
378
379
380
381 if (r->cond && !(r->cond & params->flags))
382 continue;
383
384
385
386
387
388
389
390
391
392
393
394 for (d = 0; r->deps[d] >= 0; d++) {
395 if (vstamps[r->deps[d]] > rstamps[k])
396 break;
397 }
398 if (r->deps[d] < 0)
399 continue;
400
401 if (trace_hw_mask_param_enabled()) {
402 if (hw_is_mask(r->var))
403 old_mask = *hw_param_mask(params, r->var);
404 }
405 if (trace_hw_interval_param_enabled()) {
406 if (hw_is_interval(r->var))
407 old_interval = *hw_param_interval(params, r->var);
408 }
409
410 changed = r->func(params, r);
411 if (changed < 0) {
412 err = changed;
413 goto out;
414 }
415
416
417
418
419
420
421 if (changed && r->var >= 0) {
422 if (hw_is_mask(r->var)) {
423 trace_hw_mask_param(substream, r->var,
424 k + 1, &old_mask,
425 hw_param_mask(params, r->var));
426 }
427 if (hw_is_interval(r->var)) {
428 trace_hw_interval_param(substream, r->var,
429 k + 1, &old_interval,
430 hw_param_interval(params, r->var));
431 }
432
433 params->cmask |= PARAM_MASK_BIT(r->var);
434 vstamps[r->var] = stamp;
435 again = true;
436 }
437
438 rstamps[k] = stamp++;
439 }
440
441
442 if (again)
443 goto retry;
444
445 out:
446 kfree(rstamps);
447 return err;
448}
449
450static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
451 struct snd_pcm_hw_params *params)
452{
453 const struct snd_interval *i;
454 const struct snd_mask *m;
455 int err;
456
457 if (!params->msbits) {
458 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
459 if (snd_interval_single(i))
460 params->msbits = snd_interval_value(i);
461 }
462
463 if (!params->rate_den) {
464 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
465 if (snd_interval_single(i)) {
466 params->rate_num = snd_interval_value(i);
467 params->rate_den = 1;
468 }
469 }
470
471 if (!params->fifo_size) {
472 m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
473 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
474 if (snd_mask_single(m) && snd_interval_single(i)) {
475 err = snd_pcm_ops_ioctl(substream,
476 SNDRV_PCM_IOCTL1_FIFO_SIZE,
477 params);
478 if (err < 0)
479 return err;
480 }
481 }
482
483 if (!params->info) {
484 params->info = substream->runtime->hw.info;
485 params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
486 SNDRV_PCM_INFO_DRAIN_TRIGGER);
487 if (!hw_support_mmap(substream))
488 params->info &= ~(SNDRV_PCM_INFO_MMAP |
489 SNDRV_PCM_INFO_MMAP_VALID);
490 }
491
492 return 0;
493}
494
495int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
496 struct snd_pcm_hw_params *params)
497{
498 int err;
499
500 params->info = 0;
501 params->fifo_size = 0;
502 if (params->rmask & PARAM_MASK_BIT(SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
503 params->msbits = 0;
504 if (params->rmask & PARAM_MASK_BIT(SNDRV_PCM_HW_PARAM_RATE)) {
505 params->rate_num = 0;
506 params->rate_den = 0;
507 }
508
509 err = constrain_mask_params(substream, params);
510 if (err < 0)
511 return err;
512
513 err = constrain_interval_params(substream, params);
514 if (err < 0)
515 return err;
516
517 err = constrain_params_by_rules(substream, params);
518 if (err < 0)
519 return err;
520
521 params->rmask = 0;
522
523 return 0;
524}
525EXPORT_SYMBOL(snd_pcm_hw_refine);
526
527static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
528 struct snd_pcm_hw_params __user * _params)
529{
530 struct snd_pcm_hw_params *params;
531 int err;
532
533 params = memdup_user(_params, sizeof(*params));
534 if (IS_ERR(params))
535 return PTR_ERR(params);
536
537 err = snd_pcm_hw_refine(substream, params);
538 if (err < 0)
539 goto end;
540
541 err = fixup_unreferenced_params(substream, params);
542 if (err < 0)
543 goto end;
544
545 if (copy_to_user(_params, params, sizeof(*params)))
546 err = -EFAULT;
547end:
548 kfree(params);
549 return err;
550}
551
552static int period_to_usecs(struct snd_pcm_runtime *runtime)
553{
554 int usecs;
555
556 if (! runtime->rate)
557 return -1;
558
559
560 usecs = (750000 / runtime->rate) * runtime->period_size;
561 usecs += ((750000 % runtime->rate) * runtime->period_size) /
562 runtime->rate;
563
564 return usecs;
565}
566
567static void snd_pcm_set_state(struct snd_pcm_substream *substream,
568 snd_pcm_state_t state)
569{
570 snd_pcm_stream_lock_irq(substream);
571 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
572 substream->runtime->status->state = state;
573 snd_pcm_stream_unlock_irq(substream);
574}
575
576static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
577 int event)
578{
579#ifdef CONFIG_SND_PCM_TIMER
580 if (substream->timer)
581 snd_timer_notify(substream->timer, event,
582 &substream->runtime->trigger_tstamp);
583#endif
584}
585
586static void snd_pcm_sync_stop(struct snd_pcm_substream *substream)
587{
588 if (substream->runtime->stop_operating) {
589 substream->runtime->stop_operating = false;
590 if (substream->ops->sync_stop)
591 substream->ops->sync_stop(substream);
592 else if (substream->pcm->card->sync_irq > 0)
593 synchronize_irq(substream->pcm->card->sync_irq);
594 }
595}
596
597
598
599
600
601
602
603
604
605
606
607
608
609static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
610 struct snd_pcm_hw_params *params)
611{
612 static const int vars[] = {
613 SNDRV_PCM_HW_PARAM_ACCESS,
614 SNDRV_PCM_HW_PARAM_FORMAT,
615 SNDRV_PCM_HW_PARAM_SUBFORMAT,
616 SNDRV_PCM_HW_PARAM_CHANNELS,
617 SNDRV_PCM_HW_PARAM_RATE,
618 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
619 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
620 SNDRV_PCM_HW_PARAM_TICK_TIME,
621 -1
622 };
623 const int *v;
624 struct snd_mask old_mask;
625 struct snd_interval old_interval;
626 int changed;
627
628 for (v = vars; *v != -1; v++) {
629
630 if (trace_hw_mask_param_enabled()) {
631 if (hw_is_mask(*v))
632 old_mask = *hw_param_mask(params, *v);
633 }
634 if (trace_hw_interval_param_enabled()) {
635 if (hw_is_interval(*v))
636 old_interval = *hw_param_interval(params, *v);
637 }
638 if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
639 changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
640 else
641 changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
642 if (changed < 0)
643 return changed;
644 if (changed == 0)
645 continue;
646
647
648 if (hw_is_mask(*v)) {
649 trace_hw_mask_param(pcm, *v, 0, &old_mask,
650 hw_param_mask(params, *v));
651 }
652 if (hw_is_interval(*v)) {
653 trace_hw_interval_param(pcm, *v, 0, &old_interval,
654 hw_param_interval(params, *v));
655 }
656 }
657
658 return 0;
659}
660
661static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
662 struct snd_pcm_hw_params *params)
663{
664 struct snd_pcm_runtime *runtime;
665 int err, usecs;
666 unsigned int bits;
667 snd_pcm_uframes_t frames;
668
669 if (PCM_RUNTIME_CHECK(substream))
670 return -ENXIO;
671 runtime = substream->runtime;
672 snd_pcm_stream_lock_irq(substream);
673 switch (runtime->status->state) {
674 case SNDRV_PCM_STATE_OPEN:
675 case SNDRV_PCM_STATE_SETUP:
676 case SNDRV_PCM_STATE_PREPARED:
677 break;
678 default:
679 snd_pcm_stream_unlock_irq(substream);
680 return -EBADFD;
681 }
682 snd_pcm_stream_unlock_irq(substream);
683#if IS_ENABLED(CONFIG_SND_PCM_OSS)
684 if (!substream->oss.oss)
685#endif
686 if (atomic_read(&substream->mmap_count))
687 return -EBADFD;
688
689 snd_pcm_sync_stop(substream);
690
691 params->rmask = ~0U;
692 err = snd_pcm_hw_refine(substream, params);
693 if (err < 0)
694 goto _error;
695
696 err = snd_pcm_hw_params_choose(substream, params);
697 if (err < 0)
698 goto _error;
699
700 err = fixup_unreferenced_params(substream, params);
701 if (err < 0)
702 goto _error;
703
704 if (substream->managed_buffer_alloc) {
705 err = snd_pcm_lib_malloc_pages(substream,
706 params_buffer_bytes(params));
707 if (err < 0)
708 goto _error;
709 runtime->buffer_changed = err > 0;
710 }
711
712 if (substream->ops->hw_params != NULL) {
713 err = substream->ops->hw_params(substream, params);
714 if (err < 0)
715 goto _error;
716 }
717
718 runtime->access = params_access(params);
719 runtime->format = params_format(params);
720 runtime->subformat = params_subformat(params);
721 runtime->channels = params_channels(params);
722 runtime->rate = params_rate(params);
723 runtime->period_size = params_period_size(params);
724 runtime->periods = params_periods(params);
725 runtime->buffer_size = params_buffer_size(params);
726 runtime->info = params->info;
727 runtime->rate_num = params->rate_num;
728 runtime->rate_den = params->rate_den;
729 runtime->no_period_wakeup =
730 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
731 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
732
733 bits = snd_pcm_format_physical_width(runtime->format);
734 runtime->sample_bits = bits;
735 bits *= runtime->channels;
736 runtime->frame_bits = bits;
737 frames = 1;
738 while (bits % 8 != 0) {
739 bits *= 2;
740 frames *= 2;
741 }
742 runtime->byte_align = bits / 8;
743 runtime->min_align = frames;
744
745
746 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
747 runtime->period_step = 1;
748 runtime->control->avail_min = runtime->period_size;
749 runtime->start_threshold = 1;
750 runtime->stop_threshold = runtime->buffer_size;
751 runtime->silence_threshold = 0;
752 runtime->silence_size = 0;
753 runtime->boundary = runtime->buffer_size;
754 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
755 runtime->boundary *= 2;
756
757
758 if (runtime->dma_area && !substream->ops->copy_user)
759 memset(runtime->dma_area, 0, runtime->dma_bytes);
760
761 snd_pcm_timer_resolution_change(substream);
762 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
763
764 if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req))
765 cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
766 if ((usecs = period_to_usecs(runtime)) >= 0)
767 cpu_latency_qos_add_request(&substream->latency_pm_qos_req,
768 usecs);
769 return 0;
770 _error:
771
772
773
774 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
775 if (substream->ops->hw_free != NULL)
776 substream->ops->hw_free(substream);
777 if (substream->managed_buffer_alloc)
778 snd_pcm_lib_free_pages(substream);
779 return err;
780}
781
782static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
783 struct snd_pcm_hw_params __user * _params)
784{
785 struct snd_pcm_hw_params *params;
786 int err;
787
788 params = memdup_user(_params, sizeof(*params));
789 if (IS_ERR(params))
790 return PTR_ERR(params);
791
792 err = snd_pcm_hw_params(substream, params);
793 if (err < 0)
794 goto end;
795
796 if (copy_to_user(_params, params, sizeof(*params)))
797 err = -EFAULT;
798end:
799 kfree(params);
800 return err;
801}
802
803static int do_hw_free(struct snd_pcm_substream *substream)
804{
805 int result = 0;
806
807 snd_pcm_sync_stop(substream);
808 if (substream->ops->hw_free)
809 result = substream->ops->hw_free(substream);
810 if (substream->managed_buffer_alloc)
811 snd_pcm_lib_free_pages(substream);
812 return result;
813}
814
815static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
816{
817 struct snd_pcm_runtime *runtime;
818 int result;
819
820 if (PCM_RUNTIME_CHECK(substream))
821 return -ENXIO;
822 runtime = substream->runtime;
823 snd_pcm_stream_lock_irq(substream);
824 switch (runtime->status->state) {
825 case SNDRV_PCM_STATE_SETUP:
826 case SNDRV_PCM_STATE_PREPARED:
827 break;
828 default:
829 snd_pcm_stream_unlock_irq(substream);
830 return -EBADFD;
831 }
832 snd_pcm_stream_unlock_irq(substream);
833 if (atomic_read(&substream->mmap_count))
834 return -EBADFD;
835 result = do_hw_free(substream);
836 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
837 cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
838 return result;
839}
840
841static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
842 struct snd_pcm_sw_params *params)
843{
844 struct snd_pcm_runtime *runtime;
845 int err;
846
847 if (PCM_RUNTIME_CHECK(substream))
848 return -ENXIO;
849 runtime = substream->runtime;
850 snd_pcm_stream_lock_irq(substream);
851 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
852 snd_pcm_stream_unlock_irq(substream);
853 return -EBADFD;
854 }
855 snd_pcm_stream_unlock_irq(substream);
856
857 if (params->tstamp_mode < 0 ||
858 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
859 return -EINVAL;
860 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
861 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
862 return -EINVAL;
863 if (params->avail_min == 0)
864 return -EINVAL;
865 if (params->silence_size >= runtime->boundary) {
866 if (params->silence_threshold != 0)
867 return -EINVAL;
868 } else {
869 if (params->silence_size > params->silence_threshold)
870 return -EINVAL;
871 if (params->silence_threshold > runtime->buffer_size)
872 return -EINVAL;
873 }
874 err = 0;
875 snd_pcm_stream_lock_irq(substream);
876 runtime->tstamp_mode = params->tstamp_mode;
877 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
878 runtime->tstamp_type = params->tstamp_type;
879 runtime->period_step = params->period_step;
880 runtime->control->avail_min = params->avail_min;
881 runtime->start_threshold = params->start_threshold;
882 runtime->stop_threshold = params->stop_threshold;
883 runtime->silence_threshold = params->silence_threshold;
884 runtime->silence_size = params->silence_size;
885 params->boundary = runtime->boundary;
886 if (snd_pcm_running(substream)) {
887 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
888 runtime->silence_size > 0)
889 snd_pcm_playback_silence(substream, ULONG_MAX);
890 err = snd_pcm_update_state(substream, runtime);
891 }
892 snd_pcm_stream_unlock_irq(substream);
893 return err;
894}
895
896static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
897 struct snd_pcm_sw_params __user * _params)
898{
899 struct snd_pcm_sw_params params;
900 int err;
901 if (copy_from_user(¶ms, _params, sizeof(params)))
902 return -EFAULT;
903 err = snd_pcm_sw_params(substream, ¶ms);
904 if (copy_to_user(_params, ¶ms, sizeof(params)))
905 return -EFAULT;
906 return err;
907}
908
909static inline snd_pcm_uframes_t
910snd_pcm_calc_delay(struct snd_pcm_substream *substream)
911{
912 snd_pcm_uframes_t delay;
913
914 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
915 delay = snd_pcm_playback_hw_avail(substream->runtime);
916 else
917 delay = snd_pcm_capture_avail(substream->runtime);
918 return delay + substream->runtime->delay;
919}
920
921int snd_pcm_status64(struct snd_pcm_substream *substream,
922 struct snd_pcm_status64 *status)
923{
924 struct snd_pcm_runtime *runtime = substream->runtime;
925
926 snd_pcm_stream_lock_irq(substream);
927
928 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
929 &runtime->audio_tstamp_config);
930
931
932 if (runtime->audio_tstamp_config.type_requested ==
933 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
934 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
935 runtime->audio_tstamp_config.type_requested =
936 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
937 else
938 runtime->audio_tstamp_config.type_requested =
939 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
940 runtime->audio_tstamp_report.valid = 0;
941 } else
942 runtime->audio_tstamp_report.valid = 1;
943
944 status->state = runtime->status->state;
945 status->suspended_state = runtime->status->suspended_state;
946 if (status->state == SNDRV_PCM_STATE_OPEN)
947 goto _end;
948 status->trigger_tstamp_sec = runtime->trigger_tstamp.tv_sec;
949 status->trigger_tstamp_nsec = runtime->trigger_tstamp.tv_nsec;
950 if (snd_pcm_running(substream)) {
951 snd_pcm_update_hw_ptr(substream);
952 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
953 status->tstamp_sec = runtime->status->tstamp.tv_sec;
954 status->tstamp_nsec =
955 runtime->status->tstamp.tv_nsec;
956 status->driver_tstamp_sec =
957 runtime->driver_tstamp.tv_sec;
958 status->driver_tstamp_nsec =
959 runtime->driver_tstamp.tv_nsec;
960 status->audio_tstamp_sec =
961 runtime->status->audio_tstamp.tv_sec;
962 status->audio_tstamp_nsec =
963 runtime->status->audio_tstamp.tv_nsec;
964 if (runtime->audio_tstamp_report.valid == 1)
965
966 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
967 &status->audio_tstamp_accuracy,
968 &runtime->audio_tstamp_report);
969
970 goto _tstamp_end;
971 }
972 } else {
973
974 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
975 struct timespec64 tstamp;
976
977 snd_pcm_gettime(runtime, &tstamp);
978 status->tstamp_sec = tstamp.tv_sec;
979 status->tstamp_nsec = tstamp.tv_nsec;
980 }
981 }
982 _tstamp_end:
983 status->appl_ptr = runtime->control->appl_ptr;
984 status->hw_ptr = runtime->status->hw_ptr;
985 status->avail = snd_pcm_avail(substream);
986 status->delay = snd_pcm_running(substream) ?
987 snd_pcm_calc_delay(substream) : 0;
988 status->avail_max = runtime->avail_max;
989 status->overrange = runtime->overrange;
990 runtime->avail_max = 0;
991 runtime->overrange = 0;
992 _end:
993 snd_pcm_stream_unlock_irq(substream);
994 return 0;
995}
996
997static int snd_pcm_status_user64(struct snd_pcm_substream *substream,
998 struct snd_pcm_status64 __user * _status,
999 bool ext)
1000{
1001 struct snd_pcm_status64 status;
1002 int res;
1003
1004 memset(&status, 0, sizeof(status));
1005
1006
1007
1008
1009
1010 if (ext && get_user(status.audio_tstamp_data,
1011 (u32 __user *)(&_status->audio_tstamp_data)))
1012 return -EFAULT;
1013 res = snd_pcm_status64(substream, &status);
1014 if (res < 0)
1015 return res;
1016 if (copy_to_user(_status, &status, sizeof(status)))
1017 return -EFAULT;
1018 return 0;
1019}
1020
1021static int snd_pcm_status_user32(struct snd_pcm_substream *substream,
1022 struct snd_pcm_status32 __user * _status,
1023 bool ext)
1024{
1025 struct snd_pcm_status64 status64;
1026 struct snd_pcm_status32 status32;
1027 int res;
1028
1029 memset(&status64, 0, sizeof(status64));
1030 memset(&status32, 0, sizeof(status32));
1031
1032
1033
1034
1035
1036 if (ext && get_user(status64.audio_tstamp_data,
1037 (u32 __user *)(&_status->audio_tstamp_data)))
1038 return -EFAULT;
1039 res = snd_pcm_status64(substream, &status64);
1040 if (res < 0)
1041 return res;
1042
1043 status32 = (struct snd_pcm_status32) {
1044 .state = status64.state,
1045 .trigger_tstamp_sec = status64.trigger_tstamp_sec,
1046 .trigger_tstamp_nsec = status64.trigger_tstamp_nsec,
1047 .tstamp_sec = status64.tstamp_sec,
1048 .tstamp_nsec = status64.tstamp_nsec,
1049 .appl_ptr = status64.appl_ptr,
1050 .hw_ptr = status64.hw_ptr,
1051 .delay = status64.delay,
1052 .avail = status64.avail,
1053 .avail_max = status64.avail_max,
1054 .overrange = status64.overrange,
1055 .suspended_state = status64.suspended_state,
1056 .audio_tstamp_data = status64.audio_tstamp_data,
1057 .audio_tstamp_sec = status64.audio_tstamp_sec,
1058 .audio_tstamp_nsec = status64.audio_tstamp_nsec,
1059 .driver_tstamp_sec = status64.audio_tstamp_sec,
1060 .driver_tstamp_nsec = status64.audio_tstamp_nsec,
1061 .audio_tstamp_accuracy = status64.audio_tstamp_accuracy,
1062 };
1063
1064 if (copy_to_user(_status, &status32, sizeof(status32)))
1065 return -EFAULT;
1066
1067 return 0;
1068}
1069
1070static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
1071 struct snd_pcm_channel_info * info)
1072{
1073 struct snd_pcm_runtime *runtime;
1074 unsigned int channel;
1075
1076 channel = info->channel;
1077 runtime = substream->runtime;
1078 snd_pcm_stream_lock_irq(substream);
1079 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
1080 snd_pcm_stream_unlock_irq(substream);
1081 return -EBADFD;
1082 }
1083 snd_pcm_stream_unlock_irq(substream);
1084 if (channel >= runtime->channels)
1085 return -EINVAL;
1086 memset(info, 0, sizeof(*info));
1087 info->channel = channel;
1088 return snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
1089}
1090
1091static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
1092 struct snd_pcm_channel_info __user * _info)
1093{
1094 struct snd_pcm_channel_info info;
1095 int res;
1096
1097 if (copy_from_user(&info, _info, sizeof(info)))
1098 return -EFAULT;
1099 res = snd_pcm_channel_info(substream, &info);
1100 if (res < 0)
1101 return res;
1102 if (copy_to_user(_info, &info, sizeof(info)))
1103 return -EFAULT;
1104 return 0;
1105}
1106
1107static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1108{
1109 struct snd_pcm_runtime *runtime = substream->runtime;
1110 if (runtime->trigger_master == NULL)
1111 return;
1112 if (runtime->trigger_master == substream) {
1113 if (!runtime->trigger_tstamp_latched)
1114 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1115 } else {
1116 snd_pcm_trigger_tstamp(runtime->trigger_master);
1117 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
1118 }
1119 runtime->trigger_master = NULL;
1120}
1121
1122#define ACTION_ARG_IGNORE (__force snd_pcm_state_t)0
1123
1124struct action_ops {
1125 int (*pre_action)(struct snd_pcm_substream *substream,
1126 snd_pcm_state_t state);
1127 int (*do_action)(struct snd_pcm_substream *substream,
1128 snd_pcm_state_t state);
1129 void (*undo_action)(struct snd_pcm_substream *substream,
1130 snd_pcm_state_t state);
1131 void (*post_action)(struct snd_pcm_substream *substream,
1132 snd_pcm_state_t state);
1133};
1134
1135
1136
1137
1138
1139
1140static int snd_pcm_action_group(const struct action_ops *ops,
1141 struct snd_pcm_substream *substream,
1142 snd_pcm_state_t state,
1143 bool do_lock)
1144{
1145 struct snd_pcm_substream *s = NULL;
1146 struct snd_pcm_substream *s1;
1147 int res = 0, depth = 1;
1148
1149 snd_pcm_group_for_each_entry(s, substream) {
1150 if (do_lock && s != substream) {
1151 if (s->pcm->nonatomic)
1152 mutex_lock_nested(&s->self_group.mutex, depth);
1153 else
1154 spin_lock_nested(&s->self_group.lock, depth);
1155 depth++;
1156 }
1157 res = ops->pre_action(s, state);
1158 if (res < 0)
1159 goto _unlock;
1160 }
1161 snd_pcm_group_for_each_entry(s, substream) {
1162 res = ops->do_action(s, state);
1163 if (res < 0) {
1164 if (ops->undo_action) {
1165 snd_pcm_group_for_each_entry(s1, substream) {
1166 if (s1 == s)
1167 break;
1168 ops->undo_action(s1, state);
1169 }
1170 }
1171 s = NULL;
1172 goto _unlock;
1173 }
1174 }
1175 snd_pcm_group_for_each_entry(s, substream) {
1176 ops->post_action(s, state);
1177 }
1178 _unlock:
1179 if (do_lock) {
1180
1181 snd_pcm_group_for_each_entry(s1, substream) {
1182 if (s1 != substream) {
1183 if (s1->pcm->nonatomic)
1184 mutex_unlock(&s1->self_group.mutex);
1185 else
1186 spin_unlock(&s1->self_group.lock);
1187 }
1188 if (s1 == s)
1189 break;
1190 }
1191 }
1192 return res;
1193}
1194
1195
1196
1197
1198static int snd_pcm_action_single(const struct action_ops *ops,
1199 struct snd_pcm_substream *substream,
1200 snd_pcm_state_t state)
1201{
1202 int res;
1203
1204 res = ops->pre_action(substream, state);
1205 if (res < 0)
1206 return res;
1207 res = ops->do_action(substream, state);
1208 if (res == 0)
1209 ops->post_action(substream, state);
1210 else if (ops->undo_action)
1211 ops->undo_action(substream, state);
1212 return res;
1213}
1214
1215static void snd_pcm_group_assign(struct snd_pcm_substream *substream,
1216 struct snd_pcm_group *new_group)
1217{
1218 substream->group = new_group;
1219 list_move(&substream->link_list, &new_group->substreams);
1220}
1221
1222
1223
1224
1225
1226static void snd_pcm_group_unref(struct snd_pcm_group *group,
1227 struct snd_pcm_substream *substream)
1228{
1229 bool do_free;
1230
1231 if (!group)
1232 return;
1233 do_free = refcount_dec_and_test(&group->refs);
1234 snd_pcm_group_unlock(group, substream->pcm->nonatomic);
1235 if (do_free)
1236 kfree(group);
1237}
1238
1239
1240
1241
1242
1243static struct snd_pcm_group *
1244snd_pcm_stream_group_ref(struct snd_pcm_substream *substream)
1245{
1246 bool nonatomic = substream->pcm->nonatomic;
1247 struct snd_pcm_group *group;
1248 bool trylock;
1249
1250 for (;;) {
1251 if (!snd_pcm_stream_linked(substream))
1252 return NULL;
1253 group = substream->group;
1254
1255 refcount_inc(&group->refs);
1256
1257 trylock = nonatomic ? mutex_trylock(&group->mutex) :
1258 spin_trylock(&group->lock);
1259 if (trylock)
1260 break;
1261
1262
1263 snd_pcm_stream_unlock(substream);
1264 snd_pcm_group_lock(group, nonatomic);
1265 snd_pcm_stream_lock(substream);
1266
1267
1268 if (substream->group == group)
1269 break;
1270
1271 snd_pcm_group_unref(group, substream);
1272 }
1273 return group;
1274}
1275
1276
1277
1278
1279static int snd_pcm_action(const struct action_ops *ops,
1280 struct snd_pcm_substream *substream,
1281 snd_pcm_state_t state)
1282{
1283 struct snd_pcm_group *group;
1284 int res;
1285
1286 group = snd_pcm_stream_group_ref(substream);
1287 if (group)
1288 res = snd_pcm_action_group(ops, substream, state, true);
1289 else
1290 res = snd_pcm_action_single(ops, substream, state);
1291 snd_pcm_group_unref(group, substream);
1292 return res;
1293}
1294
1295
1296
1297
1298static int snd_pcm_action_lock_irq(const struct action_ops *ops,
1299 struct snd_pcm_substream *substream,
1300 snd_pcm_state_t state)
1301{
1302 int res;
1303
1304 snd_pcm_stream_lock_irq(substream);
1305 res = snd_pcm_action(ops, substream, state);
1306 snd_pcm_stream_unlock_irq(substream);
1307 return res;
1308}
1309
1310
1311
1312static int snd_pcm_action_nonatomic(const struct action_ops *ops,
1313 struct snd_pcm_substream *substream,
1314 snd_pcm_state_t state)
1315{
1316 int res;
1317
1318
1319 down_read(&snd_pcm_link_rwsem);
1320 if (snd_pcm_stream_linked(substream))
1321 res = snd_pcm_action_group(ops, substream, state, false);
1322 else
1323 res = snd_pcm_action_single(ops, substream, state);
1324 up_read(&snd_pcm_link_rwsem);
1325 return res;
1326}
1327
1328
1329
1330
1331static int snd_pcm_pre_start(struct snd_pcm_substream *substream,
1332 snd_pcm_state_t state)
1333{
1334 struct snd_pcm_runtime *runtime = substream->runtime;
1335 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1336 return -EBADFD;
1337 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1338 !snd_pcm_playback_data(substream))
1339 return -EPIPE;
1340 runtime->trigger_tstamp_latched = false;
1341 runtime->trigger_master = substream;
1342 return 0;
1343}
1344
1345static int snd_pcm_do_start(struct snd_pcm_substream *substream,
1346 snd_pcm_state_t state)
1347{
1348 if (substream->runtime->trigger_master != substream)
1349 return 0;
1350 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1351}
1352
1353static void snd_pcm_undo_start(struct snd_pcm_substream *substream,
1354 snd_pcm_state_t state)
1355{
1356 if (substream->runtime->trigger_master == substream)
1357 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1358}
1359
1360static void snd_pcm_post_start(struct snd_pcm_substream *substream,
1361 snd_pcm_state_t state)
1362{
1363 struct snd_pcm_runtime *runtime = substream->runtime;
1364 snd_pcm_trigger_tstamp(substream);
1365 runtime->hw_ptr_jiffies = jiffies;
1366 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1367 runtime->rate;
1368 runtime->status->state = state;
1369 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1370 runtime->silence_size > 0)
1371 snd_pcm_playback_silence(substream, ULONG_MAX);
1372 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
1373}
1374
1375static const struct action_ops snd_pcm_action_start = {
1376 .pre_action = snd_pcm_pre_start,
1377 .do_action = snd_pcm_do_start,
1378 .undo_action = snd_pcm_undo_start,
1379 .post_action = snd_pcm_post_start
1380};
1381
1382
1383
1384
1385
1386
1387
1388
1389int snd_pcm_start(struct snd_pcm_substream *substream)
1390{
1391 return snd_pcm_action(&snd_pcm_action_start, substream,
1392 SNDRV_PCM_STATE_RUNNING);
1393}
1394
1395
1396static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
1397{
1398 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
1399 SNDRV_PCM_STATE_RUNNING);
1400}
1401
1402
1403
1404
1405static int snd_pcm_pre_stop(struct snd_pcm_substream *substream,
1406 snd_pcm_state_t state)
1407{
1408 struct snd_pcm_runtime *runtime = substream->runtime;
1409 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1410 return -EBADFD;
1411 runtime->trigger_master = substream;
1412 return 0;
1413}
1414
1415static int snd_pcm_do_stop(struct snd_pcm_substream *substream,
1416 snd_pcm_state_t state)
1417{
1418 if (substream->runtime->trigger_master == substream &&
1419 snd_pcm_running(substream))
1420 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1421 return 0;
1422}
1423
1424static void snd_pcm_post_stop(struct snd_pcm_substream *substream,
1425 snd_pcm_state_t state)
1426{
1427 struct snd_pcm_runtime *runtime = substream->runtime;
1428 if (runtime->status->state != state) {
1429 snd_pcm_trigger_tstamp(substream);
1430 runtime->status->state = state;
1431 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
1432 }
1433 runtime->stop_operating = true;
1434 wake_up(&runtime->sleep);
1435 wake_up(&runtime->tsleep);
1436}
1437
1438static const struct action_ops snd_pcm_action_stop = {
1439 .pre_action = snd_pcm_pre_stop,
1440 .do_action = snd_pcm_do_stop,
1441 .post_action = snd_pcm_post_stop
1442};
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1454{
1455 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1456}
1457EXPORT_SYMBOL(snd_pcm_stop);
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1469{
1470 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1471 SNDRV_PCM_STATE_SETUP);
1472}
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1484{
1485 unsigned long flags;
1486
1487 snd_pcm_stream_lock_irqsave(substream, flags);
1488 if (substream->runtime && snd_pcm_running(substream))
1489 __snd_pcm_xrun(substream);
1490 snd_pcm_stream_unlock_irqrestore(substream, flags);
1491 return 0;
1492}
1493EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1494
1495
1496
1497
1498#define pause_pushed(state) (__force bool)(state)
1499
1500static int snd_pcm_pre_pause(struct snd_pcm_substream *substream,
1501 snd_pcm_state_t state)
1502{
1503 struct snd_pcm_runtime *runtime = substream->runtime;
1504 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1505 return -ENOSYS;
1506 if (pause_pushed(state)) {
1507 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1508 return -EBADFD;
1509 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1510 return -EBADFD;
1511 runtime->trigger_master = substream;
1512 return 0;
1513}
1514
1515static int snd_pcm_do_pause(struct snd_pcm_substream *substream,
1516 snd_pcm_state_t state)
1517{
1518 if (substream->runtime->trigger_master != substream)
1519 return 0;
1520
1521
1522 if (pause_pushed(state))
1523 snd_pcm_update_hw_ptr(substream);
1524
1525
1526
1527
1528 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1529 return substream->ops->trigger(substream,
1530 pause_pushed(state) ?
1531 SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1532 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1533}
1534
1535static void snd_pcm_undo_pause(struct snd_pcm_substream *substream,
1536 snd_pcm_state_t state)
1537{
1538 if (substream->runtime->trigger_master == substream)
1539 substream->ops->trigger(substream,
1540 pause_pushed(state) ?
1541 SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1542 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1543}
1544
1545static void snd_pcm_post_pause(struct snd_pcm_substream *substream,
1546 snd_pcm_state_t state)
1547{
1548 struct snd_pcm_runtime *runtime = substream->runtime;
1549 snd_pcm_trigger_tstamp(substream);
1550 if (pause_pushed(state)) {
1551 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1552 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
1553 wake_up(&runtime->sleep);
1554 wake_up(&runtime->tsleep);
1555 } else {
1556 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1557 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
1558 }
1559}
1560
1561static const struct action_ops snd_pcm_action_pause = {
1562 .pre_action = snd_pcm_pre_pause,
1563 .do_action = snd_pcm_do_pause,
1564 .undo_action = snd_pcm_undo_pause,
1565 .post_action = snd_pcm_post_pause
1566};
1567
1568
1569
1570
1571static int snd_pcm_pause(struct snd_pcm_substream *substream, bool push)
1572{
1573 return snd_pcm_action(&snd_pcm_action_pause, substream,
1574 (__force snd_pcm_state_t)push);
1575}
1576
1577static int snd_pcm_pause_lock_irq(struct snd_pcm_substream *substream,
1578 bool push)
1579{
1580 return snd_pcm_action_lock_irq(&snd_pcm_action_pause, substream,
1581 (__force snd_pcm_state_t)push);
1582}
1583
1584#ifdef CONFIG_PM
1585
1586
1587static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream,
1588 snd_pcm_state_t state)
1589{
1590 struct snd_pcm_runtime *runtime = substream->runtime;
1591 switch (runtime->status->state) {
1592 case SNDRV_PCM_STATE_SUSPENDED:
1593 return -EBUSY;
1594
1595 case SNDRV_PCM_STATE_OPEN:
1596 case SNDRV_PCM_STATE_SETUP:
1597 case SNDRV_PCM_STATE_DISCONNECTED:
1598 return -EBUSY;
1599 }
1600 runtime->trigger_master = substream;
1601 return 0;
1602}
1603
1604static int snd_pcm_do_suspend(struct snd_pcm_substream *substream,
1605 snd_pcm_state_t state)
1606{
1607 struct snd_pcm_runtime *runtime = substream->runtime;
1608 if (runtime->trigger_master != substream)
1609 return 0;
1610 if (! snd_pcm_running(substream))
1611 return 0;
1612 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1613 return 0;
1614}
1615
1616static void snd_pcm_post_suspend(struct snd_pcm_substream *substream,
1617 snd_pcm_state_t state)
1618{
1619 struct snd_pcm_runtime *runtime = substream->runtime;
1620 snd_pcm_trigger_tstamp(substream);
1621 runtime->status->suspended_state = runtime->status->state;
1622 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1623 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
1624 wake_up(&runtime->sleep);
1625 wake_up(&runtime->tsleep);
1626}
1627
1628static const struct action_ops snd_pcm_action_suspend = {
1629 .pre_action = snd_pcm_pre_suspend,
1630 .do_action = snd_pcm_do_suspend,
1631 .post_action = snd_pcm_post_suspend
1632};
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642static int snd_pcm_suspend(struct snd_pcm_substream *substream)
1643{
1644 int err;
1645 unsigned long flags;
1646
1647 snd_pcm_stream_lock_irqsave(substream, flags);
1648 err = snd_pcm_action(&snd_pcm_action_suspend, substream,
1649 ACTION_ARG_IGNORE);
1650 snd_pcm_stream_unlock_irqrestore(substream, flags);
1651 return err;
1652}
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662int snd_pcm_suspend_all(struct snd_pcm *pcm)
1663{
1664 struct snd_pcm_substream *substream;
1665 int stream, err = 0;
1666
1667 if (! pcm)
1668 return 0;
1669
1670 for (stream = 0; stream < 2; stream++) {
1671 for (substream = pcm->streams[stream].substream;
1672 substream; substream = substream->next) {
1673
1674 if (substream->runtime == NULL)
1675 continue;
1676
1677
1678
1679
1680
1681 if (!substream->ops)
1682 continue;
1683
1684 err = snd_pcm_suspend(substream);
1685 if (err < 0 && err != -EBUSY)
1686 return err;
1687 }
1688 }
1689 return 0;
1690}
1691EXPORT_SYMBOL(snd_pcm_suspend_all);
1692
1693
1694
1695static int snd_pcm_pre_resume(struct snd_pcm_substream *substream,
1696 snd_pcm_state_t state)
1697{
1698 struct snd_pcm_runtime *runtime = substream->runtime;
1699 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1700 return -ENOSYS;
1701 runtime->trigger_master = substream;
1702 return 0;
1703}
1704
1705static int snd_pcm_do_resume(struct snd_pcm_substream *substream,
1706 snd_pcm_state_t state)
1707{
1708 struct snd_pcm_runtime *runtime = substream->runtime;
1709 if (runtime->trigger_master != substream)
1710 return 0;
1711
1712 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1713 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1714 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1715 return 0;
1716 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1717}
1718
1719static void snd_pcm_undo_resume(struct snd_pcm_substream *substream,
1720 snd_pcm_state_t state)
1721{
1722 if (substream->runtime->trigger_master == substream &&
1723 snd_pcm_running(substream))
1724 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1725}
1726
1727static void snd_pcm_post_resume(struct snd_pcm_substream *substream,
1728 snd_pcm_state_t state)
1729{
1730 struct snd_pcm_runtime *runtime = substream->runtime;
1731 snd_pcm_trigger_tstamp(substream);
1732 runtime->status->state = runtime->status->suspended_state;
1733 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
1734 snd_pcm_sync_stop(substream);
1735}
1736
1737static const struct action_ops snd_pcm_action_resume = {
1738 .pre_action = snd_pcm_pre_resume,
1739 .do_action = snd_pcm_do_resume,
1740 .undo_action = snd_pcm_undo_resume,
1741 .post_action = snd_pcm_post_resume
1742};
1743
1744static int snd_pcm_resume(struct snd_pcm_substream *substream)
1745{
1746 return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream,
1747 ACTION_ARG_IGNORE);
1748}
1749
1750#else
1751
1752static int snd_pcm_resume(struct snd_pcm_substream *substream)
1753{
1754 return -ENOSYS;
1755}
1756
1757#endif
1758
1759
1760
1761
1762
1763
1764static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1765{
1766 struct snd_pcm_runtime *runtime = substream->runtime;
1767 int result;
1768
1769 snd_pcm_stream_lock_irq(substream);
1770 switch (runtime->status->state) {
1771 case SNDRV_PCM_STATE_XRUN:
1772 result = 0;
1773 break;
1774 case SNDRV_PCM_STATE_RUNNING:
1775 __snd_pcm_xrun(substream);
1776 result = 0;
1777 break;
1778 default:
1779 result = -EBADFD;
1780 }
1781 snd_pcm_stream_unlock_irq(substream);
1782 return result;
1783}
1784
1785
1786
1787
1788
1789static int snd_pcm_pre_reset(struct snd_pcm_substream *substream,
1790 snd_pcm_state_t state)
1791{
1792 struct snd_pcm_runtime *runtime = substream->runtime;
1793 switch (runtime->status->state) {
1794 case SNDRV_PCM_STATE_RUNNING:
1795 case SNDRV_PCM_STATE_PREPARED:
1796 case SNDRV_PCM_STATE_PAUSED:
1797 case SNDRV_PCM_STATE_SUSPENDED:
1798 return 0;
1799 default:
1800 return -EBADFD;
1801 }
1802}
1803
1804static int snd_pcm_do_reset(struct snd_pcm_substream *substream,
1805 snd_pcm_state_t state)
1806{
1807 struct snd_pcm_runtime *runtime = substream->runtime;
1808 int err = snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1809 if (err < 0)
1810 return err;
1811 runtime->hw_ptr_base = 0;
1812 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1813 runtime->status->hw_ptr % runtime->period_size;
1814 runtime->silence_start = runtime->status->hw_ptr;
1815 runtime->silence_filled = 0;
1816 return 0;
1817}
1818
1819static void snd_pcm_post_reset(struct snd_pcm_substream *substream,
1820 snd_pcm_state_t state)
1821{
1822 struct snd_pcm_runtime *runtime = substream->runtime;
1823 runtime->control->appl_ptr = runtime->status->hw_ptr;
1824 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1825 runtime->silence_size > 0)
1826 snd_pcm_playback_silence(substream, ULONG_MAX);
1827}
1828
1829static const struct action_ops snd_pcm_action_reset = {
1830 .pre_action = snd_pcm_pre_reset,
1831 .do_action = snd_pcm_do_reset,
1832 .post_action = snd_pcm_post_reset
1833};
1834
1835static int snd_pcm_reset(struct snd_pcm_substream *substream)
1836{
1837 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream,
1838 ACTION_ARG_IGNORE);
1839}
1840
1841
1842
1843
1844
1845static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1846 snd_pcm_state_t state)
1847{
1848 struct snd_pcm_runtime *runtime = substream->runtime;
1849 int f_flags = (__force int)state;
1850
1851 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1852 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1853 return -EBADFD;
1854 if (snd_pcm_running(substream))
1855 return -EBUSY;
1856 substream->f_flags = f_flags;
1857 return 0;
1858}
1859
1860static int snd_pcm_do_prepare(struct snd_pcm_substream *substream,
1861 snd_pcm_state_t state)
1862{
1863 int err;
1864 snd_pcm_sync_stop(substream);
1865 err = substream->ops->prepare(substream);
1866 if (err < 0)
1867 return err;
1868 return snd_pcm_do_reset(substream, state);
1869}
1870
1871static void snd_pcm_post_prepare(struct snd_pcm_substream *substream,
1872 snd_pcm_state_t state)
1873{
1874 struct snd_pcm_runtime *runtime = substream->runtime;
1875 runtime->control->appl_ptr = runtime->status->hw_ptr;
1876 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1877}
1878
1879static const struct action_ops snd_pcm_action_prepare = {
1880 .pre_action = snd_pcm_pre_prepare,
1881 .do_action = snd_pcm_do_prepare,
1882 .post_action = snd_pcm_post_prepare
1883};
1884
1885
1886
1887
1888
1889
1890
1891
1892static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1893 struct file *file)
1894{
1895 int f_flags;
1896
1897 if (file)
1898 f_flags = file->f_flags;
1899 else
1900 f_flags = substream->f_flags;
1901
1902 snd_pcm_stream_lock_irq(substream);
1903 switch (substream->runtime->status->state) {
1904 case SNDRV_PCM_STATE_PAUSED:
1905 snd_pcm_pause(substream, false);
1906 fallthrough;
1907 case SNDRV_PCM_STATE_SUSPENDED:
1908 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1909 break;
1910 }
1911 snd_pcm_stream_unlock_irq(substream);
1912
1913 return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1914 substream,
1915 (__force snd_pcm_state_t)f_flags);
1916}
1917
1918
1919
1920
1921
1922
1923static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream,
1924 snd_pcm_state_t state)
1925{
1926 struct snd_pcm_runtime *runtime = substream->runtime;
1927 switch (runtime->status->state) {
1928 case SNDRV_PCM_STATE_OPEN:
1929 case SNDRV_PCM_STATE_DISCONNECTED:
1930 case SNDRV_PCM_STATE_SUSPENDED:
1931 return -EBADFD;
1932 }
1933 runtime->trigger_master = substream;
1934 return 0;
1935}
1936
1937static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream,
1938 snd_pcm_state_t state)
1939{
1940 struct snd_pcm_runtime *runtime = substream->runtime;
1941 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1942 switch (runtime->status->state) {
1943 case SNDRV_PCM_STATE_PREPARED:
1944
1945 if (! snd_pcm_playback_empty(substream)) {
1946 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1947 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1948 } else {
1949 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1950 }
1951 break;
1952 case SNDRV_PCM_STATE_RUNNING:
1953 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1954 break;
1955 case SNDRV_PCM_STATE_XRUN:
1956 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1957 break;
1958 default:
1959 break;
1960 }
1961 } else {
1962
1963 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1964 snd_pcm_state_t new_state;
1965
1966 new_state = snd_pcm_capture_avail(runtime) > 0 ?
1967 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1968 snd_pcm_do_stop(substream, new_state);
1969 snd_pcm_post_stop(substream, new_state);
1970 }
1971 }
1972
1973 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1974 runtime->trigger_master == substream &&
1975 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1976 return substream->ops->trigger(substream,
1977 SNDRV_PCM_TRIGGER_DRAIN);
1978
1979 return 0;
1980}
1981
1982static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream,
1983 snd_pcm_state_t state)
1984{
1985}
1986
1987static const struct action_ops snd_pcm_action_drain_init = {
1988 .pre_action = snd_pcm_pre_drain_init,
1989 .do_action = snd_pcm_do_drain_init,
1990 .post_action = snd_pcm_post_drain_init
1991};
1992
1993
1994
1995
1996
1997
1998
1999
2000static int snd_pcm_drain(struct snd_pcm_substream *substream,
2001 struct file *file)
2002{
2003 struct snd_card *card;
2004 struct snd_pcm_runtime *runtime;
2005 struct snd_pcm_substream *s;
2006 struct snd_pcm_group *group;
2007 wait_queue_entry_t wait;
2008 int result = 0;
2009 int nonblock = 0;
2010
2011 card = substream->pcm->card;
2012 runtime = substream->runtime;
2013
2014 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2015 return -EBADFD;
2016
2017 if (file) {
2018 if (file->f_flags & O_NONBLOCK)
2019 nonblock = 1;
2020 } else if (substream->f_flags & O_NONBLOCK)
2021 nonblock = 1;
2022
2023 snd_pcm_stream_lock_irq(substream);
2024
2025 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
2026 snd_pcm_pause(substream, false);
2027
2028
2029 result = snd_pcm_action(&snd_pcm_action_drain_init, substream,
2030 ACTION_ARG_IGNORE);
2031 if (result < 0)
2032 goto unlock;
2033
2034 if (nonblock) {
2035 result = -EAGAIN;
2036 goto unlock;
2037 }
2038
2039 for (;;) {
2040 long tout;
2041 struct snd_pcm_runtime *to_check;
2042 if (signal_pending(current)) {
2043 result = -ERESTARTSYS;
2044 break;
2045 }
2046
2047 to_check = NULL;
2048 group = snd_pcm_stream_group_ref(substream);
2049 snd_pcm_group_for_each_entry(s, substream) {
2050 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
2051 continue;
2052 runtime = s->runtime;
2053 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
2054 to_check = runtime;
2055 break;
2056 }
2057 }
2058 snd_pcm_group_unref(group, substream);
2059 if (!to_check)
2060 break;
2061 init_waitqueue_entry(&wait, current);
2062 set_current_state(TASK_INTERRUPTIBLE);
2063 add_wait_queue(&to_check->sleep, &wait);
2064 snd_pcm_stream_unlock_irq(substream);
2065 if (runtime->no_period_wakeup)
2066 tout = MAX_SCHEDULE_TIMEOUT;
2067 else {
2068 tout = 10;
2069 if (runtime->rate) {
2070 long t = runtime->period_size * 2 / runtime->rate;
2071 tout = max(t, tout);
2072 }
2073 tout = msecs_to_jiffies(tout * 1000);
2074 }
2075 tout = schedule_timeout(tout);
2076
2077 snd_pcm_stream_lock_irq(substream);
2078 group = snd_pcm_stream_group_ref(substream);
2079 snd_pcm_group_for_each_entry(s, substream) {
2080 if (s->runtime == to_check) {
2081 remove_wait_queue(&to_check->sleep, &wait);
2082 break;
2083 }
2084 }
2085 snd_pcm_group_unref(group, substream);
2086
2087 if (card->shutdown) {
2088 result = -ENODEV;
2089 break;
2090 }
2091 if (tout == 0) {
2092 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
2093 result = -ESTRPIPE;
2094 else {
2095 dev_dbg(substream->pcm->card->dev,
2096 "playback drain error (DMA or IRQ trouble?)\n");
2097 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
2098 result = -EIO;
2099 }
2100 break;
2101 }
2102 }
2103
2104 unlock:
2105 snd_pcm_stream_unlock_irq(substream);
2106
2107 return result;
2108}
2109
2110
2111
2112
2113
2114
2115static int snd_pcm_drop(struct snd_pcm_substream *substream)
2116{
2117 struct snd_pcm_runtime *runtime;
2118 int result = 0;
2119
2120 if (PCM_RUNTIME_CHECK(substream))
2121 return -ENXIO;
2122 runtime = substream->runtime;
2123
2124 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
2125 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
2126 return -EBADFD;
2127
2128 snd_pcm_stream_lock_irq(substream);
2129
2130 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
2131 snd_pcm_pause(substream, false);
2132
2133 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
2134
2135 snd_pcm_stream_unlock_irq(substream);
2136
2137 return result;
2138}
2139
2140
2141static bool is_pcm_file(struct file *file)
2142{
2143 struct inode *inode = file_inode(file);
2144 struct snd_pcm *pcm;
2145 unsigned int minor;
2146
2147 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
2148 return false;
2149 minor = iminor(inode);
2150 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2151 if (!pcm)
2152 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2153 if (!pcm)
2154 return false;
2155 snd_card_unref(pcm->card);
2156 return true;
2157}
2158
2159
2160
2161
2162static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
2163{
2164 int res = 0;
2165 struct snd_pcm_file *pcm_file;
2166 struct snd_pcm_substream *substream1;
2167 struct snd_pcm_group *group, *target_group;
2168 bool nonatomic = substream->pcm->nonatomic;
2169 struct fd f = fdget(fd);
2170
2171 if (!f.file)
2172 return -EBADFD;
2173 if (!is_pcm_file(f.file)) {
2174 res = -EBADFD;
2175 goto _badf;
2176 }
2177 pcm_file = f.file->private_data;
2178 substream1 = pcm_file->substream;
2179
2180 if (substream == substream1) {
2181 res = -EINVAL;
2182 goto _badf;
2183 }
2184
2185 group = kzalloc(sizeof(*group), GFP_KERNEL);
2186 if (!group) {
2187 res = -ENOMEM;
2188 goto _nolock;
2189 }
2190 snd_pcm_group_init(group);
2191
2192 down_write(&snd_pcm_link_rwsem);
2193 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
2194 substream->runtime->status->state != substream1->runtime->status->state ||
2195 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
2196 res = -EBADFD;
2197 goto _end;
2198 }
2199 if (snd_pcm_stream_linked(substream1)) {
2200 res = -EALREADY;
2201 goto _end;
2202 }
2203
2204 snd_pcm_stream_lock_irq(substream);
2205 if (!snd_pcm_stream_linked(substream)) {
2206 snd_pcm_group_assign(substream, group);
2207 group = NULL;
2208 }
2209 target_group = substream->group;
2210 snd_pcm_stream_unlock_irq(substream);
2211
2212 snd_pcm_group_lock_irq(target_group, nonatomic);
2213 snd_pcm_stream_lock_nested(substream1);
2214 snd_pcm_group_assign(substream1, target_group);
2215 refcount_inc(&target_group->refs);
2216 snd_pcm_stream_unlock(substream1);
2217 snd_pcm_group_unlock_irq(target_group, nonatomic);
2218 _end:
2219 up_write(&snd_pcm_link_rwsem);
2220 _nolock:
2221 kfree(group);
2222 _badf:
2223 fdput(f);
2224 return res;
2225}
2226
2227static void relink_to_local(struct snd_pcm_substream *substream)
2228{
2229 snd_pcm_stream_lock_nested(substream);
2230 snd_pcm_group_assign(substream, &substream->self_group);
2231 snd_pcm_stream_unlock(substream);
2232}
2233
2234static int snd_pcm_unlink(struct snd_pcm_substream *substream)
2235{
2236 struct snd_pcm_group *group;
2237 bool nonatomic = substream->pcm->nonatomic;
2238 bool do_free = false;
2239 int res = 0;
2240
2241 down_write(&snd_pcm_link_rwsem);
2242
2243 if (!snd_pcm_stream_linked(substream)) {
2244 res = -EALREADY;
2245 goto _end;
2246 }
2247
2248 group = substream->group;
2249 snd_pcm_group_lock_irq(group, nonatomic);
2250
2251 relink_to_local(substream);
2252 refcount_dec(&group->refs);
2253
2254
2255 if (list_is_singular(&group->substreams)) {
2256 relink_to_local(list_first_entry(&group->substreams,
2257 struct snd_pcm_substream,
2258 link_list));
2259 do_free = refcount_dec_and_test(&group->refs);
2260 }
2261
2262 snd_pcm_group_unlock_irq(group, nonatomic);
2263 if (do_free)
2264 kfree(group);
2265
2266 _end:
2267 up_write(&snd_pcm_link_rwsem);
2268 return res;
2269}
2270
2271
2272
2273
2274static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
2275 struct snd_pcm_hw_rule *rule)
2276{
2277 struct snd_interval t;
2278 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
2279 hw_param_interval_c(params, rule->deps[1]), &t);
2280 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2281}
2282
2283static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
2284 struct snd_pcm_hw_rule *rule)
2285{
2286 struct snd_interval t;
2287 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
2288 hw_param_interval_c(params, rule->deps[1]), &t);
2289 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2290}
2291
2292static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
2293 struct snd_pcm_hw_rule *rule)
2294{
2295 struct snd_interval t;
2296 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
2297 hw_param_interval_c(params, rule->deps[1]),
2298 (unsigned long) rule->private, &t);
2299 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2300}
2301
2302static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
2303 struct snd_pcm_hw_rule *rule)
2304{
2305 struct snd_interval t;
2306 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
2307 (unsigned long) rule->private,
2308 hw_param_interval_c(params, rule->deps[1]), &t);
2309 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2310}
2311
2312static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
2313 struct snd_pcm_hw_rule *rule)
2314{
2315 snd_pcm_format_t k;
2316 const struct snd_interval *i =
2317 hw_param_interval_c(params, rule->deps[0]);
2318 struct snd_mask m;
2319 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
2320 snd_mask_any(&m);
2321 pcm_for_each_format(k) {
2322 int bits;
2323 if (!snd_mask_test_format(mask, k))
2324 continue;
2325 bits = snd_pcm_format_physical_width(k);
2326 if (bits <= 0)
2327 continue;
2328 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
2329 snd_mask_reset(&m, (__force unsigned)k);
2330 }
2331 return snd_mask_refine(mask, &m);
2332}
2333
2334static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
2335 struct snd_pcm_hw_rule *rule)
2336{
2337 struct snd_interval t;
2338 snd_pcm_format_t k;
2339
2340 t.min = UINT_MAX;
2341 t.max = 0;
2342 t.openmin = 0;
2343 t.openmax = 0;
2344 pcm_for_each_format(k) {
2345 int bits;
2346 if (!snd_mask_test_format(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
2347 continue;
2348 bits = snd_pcm_format_physical_width(k);
2349 if (bits <= 0)
2350 continue;
2351 if (t.min > (unsigned)bits)
2352 t.min = bits;
2353 if (t.max < (unsigned)bits)
2354 t.max = bits;
2355 }
2356 t.integer = 1;
2357 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2358}
2359
2360#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
2361#error "Change this table"
2362#endif
2363
2364static const unsigned int rates[] = {
2365 5512, 8000, 11025, 16000, 22050, 32000, 44100,
2366 48000, 64000, 88200, 96000, 176400, 192000, 352800, 384000
2367};
2368
2369const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
2370 .count = ARRAY_SIZE(rates),
2371 .list = rates,
2372};
2373
2374static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
2375 struct snd_pcm_hw_rule *rule)
2376{
2377 struct snd_pcm_hardware *hw = rule->private;
2378 return snd_interval_list(hw_param_interval(params, rule->var),
2379 snd_pcm_known_rates.count,
2380 snd_pcm_known_rates.list, hw->rates);
2381}
2382
2383static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2384 struct snd_pcm_hw_rule *rule)
2385{
2386 struct snd_interval t;
2387 struct snd_pcm_substream *substream = rule->private;
2388 t.min = 0;
2389 t.max = substream->buffer_bytes_max;
2390 t.openmin = 0;
2391 t.openmax = 0;
2392 t.integer = 1;
2393 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2394}
2395
2396static int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
2397{
2398 struct snd_pcm_runtime *runtime = substream->runtime;
2399 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
2400 int k, err;
2401
2402 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2403 snd_mask_any(constrs_mask(constrs, k));
2404 }
2405
2406 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2407 snd_interval_any(constrs_interval(constrs, k));
2408 }
2409
2410 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2411 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2412 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2413 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2414 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2415
2416 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2417 snd_pcm_hw_rule_format, NULL,
2418 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2419 if (err < 0)
2420 return err;
2421 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2422 snd_pcm_hw_rule_sample_bits, NULL,
2423 SNDRV_PCM_HW_PARAM_FORMAT,
2424 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2425 if (err < 0)
2426 return err;
2427 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2428 snd_pcm_hw_rule_div, NULL,
2429 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2430 if (err < 0)
2431 return err;
2432 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2433 snd_pcm_hw_rule_mul, NULL,
2434 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2435 if (err < 0)
2436 return err;
2437 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2438 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2439 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2440 if (err < 0)
2441 return err;
2442 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2443 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2444 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2445 if (err < 0)
2446 return err;
2447 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2448 snd_pcm_hw_rule_div, NULL,
2449 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2450 if (err < 0)
2451 return err;
2452 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2453 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2454 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2455 if (err < 0)
2456 return err;
2457 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2458 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2459 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2460 if (err < 0)
2461 return err;
2462 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2463 snd_pcm_hw_rule_div, NULL,
2464 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2465 if (err < 0)
2466 return err;
2467 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2468 snd_pcm_hw_rule_div, NULL,
2469 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2470 if (err < 0)
2471 return err;
2472 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2473 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2474 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2475 if (err < 0)
2476 return err;
2477 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2478 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2479 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2480 if (err < 0)
2481 return err;
2482 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2483 snd_pcm_hw_rule_mul, NULL,
2484 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2485 if (err < 0)
2486 return err;
2487 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2488 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2489 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2490 if (err < 0)
2491 return err;
2492 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2493 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2494 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2495 if (err < 0)
2496 return err;
2497 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2498 snd_pcm_hw_rule_muldivk, (void*) 8,
2499 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2500 if (err < 0)
2501 return err;
2502 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2503 snd_pcm_hw_rule_muldivk, (void*) 8,
2504 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2505 if (err < 0)
2506 return err;
2507 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2508 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2509 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2510 if (err < 0)
2511 return err;
2512 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2513 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2514 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2515 if (err < 0)
2516 return err;
2517 return 0;
2518}
2519
2520static int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2521{
2522 struct snd_pcm_runtime *runtime = substream->runtime;
2523 struct snd_pcm_hardware *hw = &runtime->hw;
2524 int err;
2525 unsigned int mask = 0;
2526
2527 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2528 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_RW_INTERLEAVED);
2529 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2530 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
2531 if (hw_support_mmap(substream)) {
2532 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2533 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
2534 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2535 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED);
2536 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2537 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_COMPLEX);
2538 }
2539 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2540 if (err < 0)
2541 return err;
2542
2543 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2544 if (err < 0)
2545 return err;
2546
2547 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT,
2548 PARAM_MASK_BIT(SNDRV_PCM_SUBFORMAT_STD));
2549 if (err < 0)
2550 return err;
2551
2552 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2553 hw->channels_min, hw->channels_max);
2554 if (err < 0)
2555 return err;
2556
2557 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2558 hw->rate_min, hw->rate_max);
2559 if (err < 0)
2560 return err;
2561
2562 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2563 hw->period_bytes_min, hw->period_bytes_max);
2564 if (err < 0)
2565 return err;
2566
2567 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2568 hw->periods_min, hw->periods_max);
2569 if (err < 0)
2570 return err;
2571
2572 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2573 hw->period_bytes_min, hw->buffer_bytes_max);
2574 if (err < 0)
2575 return err;
2576
2577 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2578 snd_pcm_hw_rule_buffer_bytes_max, substream,
2579 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2580 if (err < 0)
2581 return err;
2582
2583
2584 if (runtime->dma_bytes) {
2585 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2586 if (err < 0)
2587 return err;
2588 }
2589
2590 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2591 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2592 snd_pcm_hw_rule_rate, hw,
2593 SNDRV_PCM_HW_PARAM_RATE, -1);
2594 if (err < 0)
2595 return err;
2596 }
2597
2598
2599 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2600
2601 return 0;
2602}
2603
2604static void pcm_release_private(struct snd_pcm_substream *substream)
2605{
2606 if (snd_pcm_stream_linked(substream))
2607 snd_pcm_unlink(substream);
2608}
2609
2610void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2611{
2612 substream->ref_count--;
2613 if (substream->ref_count > 0)
2614 return;
2615
2616 snd_pcm_drop(substream);
2617 if (substream->hw_opened) {
2618 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
2619 do_hw_free(substream);
2620 substream->ops->close(substream);
2621 substream->hw_opened = 0;
2622 }
2623 if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req))
2624 cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
2625 if (substream->pcm_release) {
2626 substream->pcm_release(substream);
2627 substream->pcm_release = NULL;
2628 }
2629 snd_pcm_detach_substream(substream);
2630}
2631EXPORT_SYMBOL(snd_pcm_release_substream);
2632
2633int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2634 struct file *file,
2635 struct snd_pcm_substream **rsubstream)
2636{
2637 struct snd_pcm_substream *substream;
2638 int err;
2639
2640 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2641 if (err < 0)
2642 return err;
2643 if (substream->ref_count > 1) {
2644 *rsubstream = substream;
2645 return 0;
2646 }
2647
2648 err = snd_pcm_hw_constraints_init(substream);
2649 if (err < 0) {
2650 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2651 goto error;
2652 }
2653
2654 if ((err = substream->ops->open(substream)) < 0)
2655 goto error;
2656
2657 substream->hw_opened = 1;
2658
2659 err = snd_pcm_hw_constraints_complete(substream);
2660 if (err < 0) {
2661 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2662 goto error;
2663 }
2664
2665 *rsubstream = substream;
2666 return 0;
2667
2668 error:
2669 snd_pcm_release_substream(substream);
2670 return err;
2671}
2672EXPORT_SYMBOL(snd_pcm_open_substream);
2673
2674static int snd_pcm_open_file(struct file *file,
2675 struct snd_pcm *pcm,
2676 int stream)
2677{
2678 struct snd_pcm_file *pcm_file;
2679 struct snd_pcm_substream *substream;
2680 int err;
2681
2682 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2683 if (err < 0)
2684 return err;
2685
2686 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2687 if (pcm_file == NULL) {
2688 snd_pcm_release_substream(substream);
2689 return -ENOMEM;
2690 }
2691 pcm_file->substream = substream;
2692 if (substream->ref_count == 1)
2693 substream->pcm_release = pcm_release_private;
2694 file->private_data = pcm_file;
2695
2696 return 0;
2697}
2698
2699static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2700{
2701 struct snd_pcm *pcm;
2702 int err = nonseekable_open(inode, file);
2703 if (err < 0)
2704 return err;
2705 pcm = snd_lookup_minor_data(iminor(inode),
2706 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2707 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2708 if (pcm)
2709 snd_card_unref(pcm->card);
2710 return err;
2711}
2712
2713static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2714{
2715 struct snd_pcm *pcm;
2716 int err = nonseekable_open(inode, file);
2717 if (err < 0)
2718 return err;
2719 pcm = snd_lookup_minor_data(iminor(inode),
2720 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2721 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2722 if (pcm)
2723 snd_card_unref(pcm->card);
2724 return err;
2725}
2726
2727static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2728{
2729 int err;
2730 wait_queue_entry_t wait;
2731
2732 if (pcm == NULL) {
2733 err = -ENODEV;
2734 goto __error1;
2735 }
2736 err = snd_card_file_add(pcm->card, file);
2737 if (err < 0)
2738 goto __error1;
2739 if (!try_module_get(pcm->card->module)) {
2740 err = -EFAULT;
2741 goto __error2;
2742 }
2743 init_waitqueue_entry(&wait, current);
2744 add_wait_queue(&pcm->open_wait, &wait);
2745 mutex_lock(&pcm->open_mutex);
2746 while (1) {
2747 err = snd_pcm_open_file(file, pcm, stream);
2748 if (err >= 0)
2749 break;
2750 if (err == -EAGAIN) {
2751 if (file->f_flags & O_NONBLOCK) {
2752 err = -EBUSY;
2753 break;
2754 }
2755 } else
2756 break;
2757 set_current_state(TASK_INTERRUPTIBLE);
2758 mutex_unlock(&pcm->open_mutex);
2759 schedule();
2760 mutex_lock(&pcm->open_mutex);
2761 if (pcm->card->shutdown) {
2762 err = -ENODEV;
2763 break;
2764 }
2765 if (signal_pending(current)) {
2766 err = -ERESTARTSYS;
2767 break;
2768 }
2769 }
2770 remove_wait_queue(&pcm->open_wait, &wait);
2771 mutex_unlock(&pcm->open_mutex);
2772 if (err < 0)
2773 goto __error;
2774 return err;
2775
2776 __error:
2777 module_put(pcm->card->module);
2778 __error2:
2779 snd_card_file_remove(pcm->card, file);
2780 __error1:
2781 return err;
2782}
2783
2784static int snd_pcm_release(struct inode *inode, struct file *file)
2785{
2786 struct snd_pcm *pcm;
2787 struct snd_pcm_substream *substream;
2788 struct snd_pcm_file *pcm_file;
2789
2790 pcm_file = file->private_data;
2791 substream = pcm_file->substream;
2792 if (snd_BUG_ON(!substream))
2793 return -ENXIO;
2794 pcm = substream->pcm;
2795 mutex_lock(&pcm->open_mutex);
2796 snd_pcm_release_substream(substream);
2797 kfree(pcm_file);
2798 mutex_unlock(&pcm->open_mutex);
2799 wake_up(&pcm->open_wait);
2800 module_put(pcm->card->module);
2801 snd_card_file_remove(pcm->card, file);
2802 return 0;
2803}
2804
2805
2806
2807
2808static int do_pcm_hwsync(struct snd_pcm_substream *substream)
2809{
2810 switch (substream->runtime->status->state) {
2811 case SNDRV_PCM_STATE_DRAINING:
2812 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2813 return -EBADFD;
2814 fallthrough;
2815 case SNDRV_PCM_STATE_RUNNING:
2816 return snd_pcm_update_hw_ptr(substream);
2817 case SNDRV_PCM_STATE_PREPARED:
2818 case SNDRV_PCM_STATE_PAUSED:
2819 return 0;
2820 case SNDRV_PCM_STATE_SUSPENDED:
2821 return -ESTRPIPE;
2822 case SNDRV_PCM_STATE_XRUN:
2823 return -EPIPE;
2824 default:
2825 return -EBADFD;
2826 }
2827}
2828
2829
2830static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
2831 snd_pcm_uframes_t frames,
2832 snd_pcm_sframes_t avail)
2833{
2834 struct snd_pcm_runtime *runtime = substream->runtime;
2835 snd_pcm_sframes_t appl_ptr;
2836 int ret;
2837
2838 if (avail <= 0)
2839 return 0;
2840 if (frames > (snd_pcm_uframes_t)avail)
2841 frames = avail;
2842 appl_ptr = runtime->control->appl_ptr + frames;
2843 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2844 appl_ptr -= runtime->boundary;
2845 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
2846 return ret < 0 ? ret : frames;
2847}
2848
2849
2850static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
2851 snd_pcm_uframes_t frames,
2852 snd_pcm_sframes_t avail)
2853{
2854 struct snd_pcm_runtime *runtime = substream->runtime;
2855 snd_pcm_sframes_t appl_ptr;
2856 int ret;
2857
2858 if (avail <= 0)
2859 return 0;
2860 if (frames > (snd_pcm_uframes_t)avail)
2861 frames = avail;
2862 appl_ptr = runtime->control->appl_ptr - frames;
2863 if (appl_ptr < 0)
2864 appl_ptr += runtime->boundary;
2865 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
2866
2867
2868
2869
2870
2871 return ret < 0 ? 0 : frames;
2872}
2873
2874static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream,
2875 snd_pcm_uframes_t frames)
2876{
2877 snd_pcm_sframes_t ret;
2878
2879 if (frames == 0)
2880 return 0;
2881
2882 snd_pcm_stream_lock_irq(substream);
2883 ret = do_pcm_hwsync(substream);
2884 if (!ret)
2885 ret = rewind_appl_ptr(substream, frames,
2886 snd_pcm_hw_avail(substream));
2887 snd_pcm_stream_unlock_irq(substream);
2888 return ret;
2889}
2890
2891static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream,
2892 snd_pcm_uframes_t frames)
2893{
2894 snd_pcm_sframes_t ret;
2895
2896 if (frames == 0)
2897 return 0;
2898
2899 snd_pcm_stream_lock_irq(substream);
2900 ret = do_pcm_hwsync(substream);
2901 if (!ret)
2902 ret = forward_appl_ptr(substream, frames,
2903 snd_pcm_avail(substream));
2904 snd_pcm_stream_unlock_irq(substream);
2905 return ret;
2906}
2907
2908static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2909{
2910 int err;
2911
2912 snd_pcm_stream_lock_irq(substream);
2913 err = do_pcm_hwsync(substream);
2914 snd_pcm_stream_unlock_irq(substream);
2915 return err;
2916}
2917
2918static int snd_pcm_delay(struct snd_pcm_substream *substream,
2919 snd_pcm_sframes_t *delay)
2920{
2921 int err;
2922 snd_pcm_sframes_t n = 0;
2923
2924 snd_pcm_stream_lock_irq(substream);
2925 err = do_pcm_hwsync(substream);
2926 if (!err)
2927 n = snd_pcm_calc_delay(substream);
2928 snd_pcm_stream_unlock_irq(substream);
2929 if (!err)
2930 *delay = n;
2931 return err;
2932}
2933
2934static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2935 struct snd_pcm_sync_ptr __user *_sync_ptr)
2936{
2937 struct snd_pcm_runtime *runtime = substream->runtime;
2938 struct snd_pcm_sync_ptr sync_ptr;
2939 volatile struct snd_pcm_mmap_status *status;
2940 volatile struct snd_pcm_mmap_control *control;
2941 int err;
2942
2943 memset(&sync_ptr, 0, sizeof(sync_ptr));
2944 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2945 return -EFAULT;
2946 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2947 return -EFAULT;
2948 status = runtime->status;
2949 control = runtime->control;
2950 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2951 err = snd_pcm_hwsync(substream);
2952 if (err < 0)
2953 return err;
2954 }
2955 snd_pcm_stream_lock_irq(substream);
2956 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
2957 err = pcm_lib_apply_appl_ptr(substream,
2958 sync_ptr.c.control.appl_ptr);
2959 if (err < 0) {
2960 snd_pcm_stream_unlock_irq(substream);
2961 return err;
2962 }
2963 } else {
2964 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2965 }
2966 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2967 control->avail_min = sync_ptr.c.control.avail_min;
2968 else
2969 sync_ptr.c.control.avail_min = control->avail_min;
2970 sync_ptr.s.status.state = status->state;
2971 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2972 sync_ptr.s.status.tstamp = status->tstamp;
2973 sync_ptr.s.status.suspended_state = status->suspended_state;
2974 sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
2975 snd_pcm_stream_unlock_irq(substream);
2976 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2977 return -EFAULT;
2978 return 0;
2979}
2980
2981struct snd_pcm_mmap_status32 {
2982 snd_pcm_state_t state;
2983 s32 pad1;
2984 u32 hw_ptr;
2985 s32 tstamp_sec;
2986 s32 tstamp_nsec;
2987 snd_pcm_state_t suspended_state;
2988 s32 audio_tstamp_sec;
2989 s32 audio_tstamp_nsec;
2990} __attribute__((packed));
2991
2992struct snd_pcm_mmap_control32 {
2993 u32 appl_ptr;
2994 u32 avail_min;
2995};
2996
2997struct snd_pcm_sync_ptr32 {
2998 u32 flags;
2999 union {
3000 struct snd_pcm_mmap_status32 status;
3001 unsigned char reserved[64];
3002 } s;
3003 union {
3004 struct snd_pcm_mmap_control32 control;
3005 unsigned char reserved[64];
3006 } c;
3007} __attribute__((packed));
3008
3009
3010static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
3011{
3012 snd_pcm_uframes_t boundary;
3013
3014 if (! runtime->buffer_size)
3015 return 0;
3016 boundary = runtime->buffer_size;
3017 while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
3018 boundary *= 2;
3019 return boundary;
3020}
3021
3022static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
3023 struct snd_pcm_sync_ptr32 __user *src)
3024{
3025 struct snd_pcm_runtime *runtime = substream->runtime;
3026 volatile struct snd_pcm_mmap_status *status;
3027 volatile struct snd_pcm_mmap_control *control;
3028 u32 sflags;
3029 struct snd_pcm_mmap_control scontrol;
3030 struct snd_pcm_mmap_status sstatus;
3031 snd_pcm_uframes_t boundary;
3032 int err;
3033
3034 if (snd_BUG_ON(!runtime))
3035 return -EINVAL;
3036
3037 if (get_user(sflags, &src->flags) ||
3038 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
3039 get_user(scontrol.avail_min, &src->c.control.avail_min))
3040 return -EFAULT;
3041 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
3042 err = snd_pcm_hwsync(substream);
3043 if (err < 0)
3044 return err;
3045 }
3046 status = runtime->status;
3047 control = runtime->control;
3048 boundary = recalculate_boundary(runtime);
3049 if (! boundary)
3050 boundary = 0x7fffffff;
3051 snd_pcm_stream_lock_irq(substream);
3052
3053 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
3054 control->appl_ptr = scontrol.appl_ptr;
3055 else
3056 scontrol.appl_ptr = control->appl_ptr % boundary;
3057 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
3058 control->avail_min = scontrol.avail_min;
3059 else
3060 scontrol.avail_min = control->avail_min;
3061 sstatus.state = status->state;
3062 sstatus.hw_ptr = status->hw_ptr % boundary;
3063 sstatus.tstamp = status->tstamp;
3064 sstatus.suspended_state = status->suspended_state;
3065 sstatus.audio_tstamp = status->audio_tstamp;
3066 snd_pcm_stream_unlock_irq(substream);
3067 if (put_user(sstatus.state, &src->s.status.state) ||
3068 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
3069 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp_sec) ||
3070 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp_nsec) ||
3071 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
3072 put_user(sstatus.audio_tstamp.tv_sec, &src->s.status.audio_tstamp_sec) ||
3073 put_user(sstatus.audio_tstamp.tv_nsec, &src->s.status.audio_tstamp_nsec) ||
3074 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
3075 put_user(scontrol.avail_min, &src->c.control.avail_min))
3076 return -EFAULT;
3077
3078 return 0;
3079}
3080#define __SNDRV_PCM_IOCTL_SYNC_PTR32 _IOWR('A', 0x23, struct snd_pcm_sync_ptr32)
3081
3082static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
3083{
3084 struct snd_pcm_runtime *runtime = substream->runtime;
3085 int arg;
3086
3087 if (get_user(arg, _arg))
3088 return -EFAULT;
3089 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
3090 return -EINVAL;
3091 runtime->tstamp_type = arg;
3092 return 0;
3093}
3094
3095static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream,
3096 struct snd_xferi __user *_xferi)
3097{
3098 struct snd_xferi xferi;
3099 struct snd_pcm_runtime *runtime = substream->runtime;
3100 snd_pcm_sframes_t result;
3101
3102 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3103 return -EBADFD;
3104 if (put_user(0, &_xferi->result))
3105 return -EFAULT;
3106 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
3107 return -EFAULT;
3108 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3109 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
3110 else
3111 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
3112 if (put_user(result, &_xferi->result))
3113 return -EFAULT;
3114 return result < 0 ? result : 0;
3115}
3116
3117static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
3118 struct snd_xfern __user *_xfern)
3119{
3120 struct snd_xfern xfern;
3121 struct snd_pcm_runtime *runtime = substream->runtime;
3122 void *bufs;
3123 snd_pcm_sframes_t result;
3124
3125 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3126 return -EBADFD;
3127 if (runtime->channels > 128)
3128 return -EINVAL;
3129 if (put_user(0, &_xfern->result))
3130 return -EFAULT;
3131 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
3132 return -EFAULT;
3133
3134 bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
3135 if (IS_ERR(bufs))
3136 return PTR_ERR(bufs);
3137 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3138 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
3139 else
3140 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
3141 kfree(bufs);
3142 if (put_user(result, &_xfern->result))
3143 return -EFAULT;
3144 return result < 0 ? result : 0;
3145}
3146
3147static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream,
3148 snd_pcm_uframes_t __user *_frames)
3149{
3150 snd_pcm_uframes_t frames;
3151 snd_pcm_sframes_t result;
3152
3153 if (get_user(frames, _frames))
3154 return -EFAULT;
3155 if (put_user(0, _frames))
3156 return -EFAULT;
3157 result = snd_pcm_rewind(substream, frames);
3158 if (put_user(result, _frames))
3159 return -EFAULT;
3160 return result < 0 ? result : 0;
3161}
3162
3163static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream,
3164 snd_pcm_uframes_t __user *_frames)
3165{
3166 snd_pcm_uframes_t frames;
3167 snd_pcm_sframes_t result;
3168
3169 if (get_user(frames, _frames))
3170 return -EFAULT;
3171 if (put_user(0, _frames))
3172 return -EFAULT;
3173 result = snd_pcm_forward(substream, frames);
3174 if (put_user(result, _frames))
3175 return -EFAULT;
3176 return result < 0 ? result : 0;
3177}
3178
3179static int snd_pcm_common_ioctl(struct file *file,
3180 struct snd_pcm_substream *substream,
3181 unsigned int cmd, void __user *arg)
3182{
3183 struct snd_pcm_file *pcm_file = file->private_data;
3184 int res;
3185
3186 if (PCM_RUNTIME_CHECK(substream))
3187 return -ENXIO;
3188
3189 res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0);
3190 if (res < 0)
3191 return res;
3192
3193 switch (cmd) {
3194 case SNDRV_PCM_IOCTL_PVERSION:
3195 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
3196 case SNDRV_PCM_IOCTL_INFO:
3197 return snd_pcm_info_user(substream, arg);
3198 case SNDRV_PCM_IOCTL_TSTAMP:
3199 return 0;
3200 case SNDRV_PCM_IOCTL_TTSTAMP:
3201 return snd_pcm_tstamp(substream, arg);
3202 case SNDRV_PCM_IOCTL_USER_PVERSION:
3203 if (get_user(pcm_file->user_pversion,
3204 (unsigned int __user *)arg))
3205 return -EFAULT;
3206 return 0;
3207 case SNDRV_PCM_IOCTL_HW_REFINE:
3208 return snd_pcm_hw_refine_user(substream, arg);
3209 case SNDRV_PCM_IOCTL_HW_PARAMS:
3210 return snd_pcm_hw_params_user(substream, arg);
3211 case SNDRV_PCM_IOCTL_HW_FREE:
3212 return snd_pcm_hw_free(substream);
3213 case SNDRV_PCM_IOCTL_SW_PARAMS:
3214 return snd_pcm_sw_params_user(substream, arg);
3215 case SNDRV_PCM_IOCTL_STATUS32:
3216 return snd_pcm_status_user32(substream, arg, false);
3217 case SNDRV_PCM_IOCTL_STATUS_EXT32:
3218 return snd_pcm_status_user32(substream, arg, true);
3219 case SNDRV_PCM_IOCTL_STATUS64:
3220 return snd_pcm_status_user64(substream, arg, false);
3221 case SNDRV_PCM_IOCTL_STATUS_EXT64:
3222 return snd_pcm_status_user64(substream, arg, true);
3223 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
3224 return snd_pcm_channel_info_user(substream, arg);
3225 case SNDRV_PCM_IOCTL_PREPARE:
3226 return snd_pcm_prepare(substream, file);
3227 case SNDRV_PCM_IOCTL_RESET:
3228 return snd_pcm_reset(substream);
3229 case SNDRV_PCM_IOCTL_START:
3230 return snd_pcm_start_lock_irq(substream);
3231 case SNDRV_PCM_IOCTL_LINK:
3232 return snd_pcm_link(substream, (int)(unsigned long) arg);
3233 case SNDRV_PCM_IOCTL_UNLINK:
3234 return snd_pcm_unlink(substream);
3235 case SNDRV_PCM_IOCTL_RESUME:
3236 return snd_pcm_resume(substream);
3237 case SNDRV_PCM_IOCTL_XRUN:
3238 return snd_pcm_xrun(substream);
3239 case SNDRV_PCM_IOCTL_HWSYNC:
3240 return snd_pcm_hwsync(substream);
3241 case SNDRV_PCM_IOCTL_DELAY:
3242 {
3243 snd_pcm_sframes_t delay;
3244 snd_pcm_sframes_t __user *res = arg;
3245 int err;
3246
3247 err = snd_pcm_delay(substream, &delay);
3248 if (err)
3249 return err;
3250 if (put_user(delay, res))
3251 return -EFAULT;
3252 return 0;
3253 }
3254 case __SNDRV_PCM_IOCTL_SYNC_PTR32:
3255 return snd_pcm_ioctl_sync_ptr_compat(substream, arg);
3256 case __SNDRV_PCM_IOCTL_SYNC_PTR64:
3257 return snd_pcm_sync_ptr(substream, arg);
3258#ifdef CONFIG_SND_SUPPORT_OLD_API
3259 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
3260 return snd_pcm_hw_refine_old_user(substream, arg);
3261 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
3262 return snd_pcm_hw_params_old_user(substream, arg);
3263#endif
3264 case SNDRV_PCM_IOCTL_DRAIN:
3265 return snd_pcm_drain(substream, file);
3266 case SNDRV_PCM_IOCTL_DROP:
3267 return snd_pcm_drop(substream);
3268 case SNDRV_PCM_IOCTL_PAUSE:
3269 return snd_pcm_pause_lock_irq(substream, (unsigned long)arg);
3270 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
3271 case SNDRV_PCM_IOCTL_READI_FRAMES:
3272 return snd_pcm_xferi_frames_ioctl(substream, arg);
3273 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
3274 case SNDRV_PCM_IOCTL_READN_FRAMES:
3275 return snd_pcm_xfern_frames_ioctl(substream, arg);
3276 case SNDRV_PCM_IOCTL_REWIND:
3277 return snd_pcm_rewind_ioctl(substream, arg);
3278 case SNDRV_PCM_IOCTL_FORWARD:
3279 return snd_pcm_forward_ioctl(substream, arg);
3280 }
3281 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
3282 return -ENOTTY;
3283}
3284
3285static long snd_pcm_ioctl(struct file *file, unsigned int cmd,
3286 unsigned long arg)
3287{
3288 struct snd_pcm_file *pcm_file;
3289
3290 pcm_file = file->private_data;
3291
3292 if (((cmd >> 8) & 0xff) != 'A')
3293 return -ENOTTY;
3294
3295 return snd_pcm_common_ioctl(file, pcm_file->substream, cmd,
3296 (void __user *)arg);
3297}
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
3310 unsigned int cmd, void *arg)
3311{
3312 snd_pcm_uframes_t *frames = arg;
3313 snd_pcm_sframes_t result;
3314
3315 switch (cmd) {
3316 case SNDRV_PCM_IOCTL_FORWARD:
3317 {
3318
3319 if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
3320 return -EINVAL;
3321 result = snd_pcm_forward(substream, *frames);
3322 return result < 0 ? result : 0;
3323 }
3324 case SNDRV_PCM_IOCTL_HW_PARAMS:
3325 return snd_pcm_hw_params(substream, arg);
3326 case SNDRV_PCM_IOCTL_SW_PARAMS:
3327 return snd_pcm_sw_params(substream, arg);
3328 case SNDRV_PCM_IOCTL_PREPARE:
3329 return snd_pcm_prepare(substream, NULL);
3330 case SNDRV_PCM_IOCTL_START:
3331 return snd_pcm_start_lock_irq(substream);
3332 case SNDRV_PCM_IOCTL_DRAIN:
3333 return snd_pcm_drain(substream, NULL);
3334 case SNDRV_PCM_IOCTL_DROP:
3335 return snd_pcm_drop(substream);
3336 case SNDRV_PCM_IOCTL_DELAY:
3337 return snd_pcm_delay(substream, frames);
3338 default:
3339 return -EINVAL;
3340 }
3341}
3342EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3343
3344static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3345 loff_t * offset)
3346{
3347 struct snd_pcm_file *pcm_file;
3348 struct snd_pcm_substream *substream;
3349 struct snd_pcm_runtime *runtime;
3350 snd_pcm_sframes_t result;
3351
3352 pcm_file = file->private_data;
3353 substream = pcm_file->substream;
3354 if (PCM_RUNTIME_CHECK(substream))
3355 return -ENXIO;
3356 runtime = substream->runtime;
3357 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3358 return -EBADFD;
3359 if (!frame_aligned(runtime, count))
3360 return -EINVAL;
3361 count = bytes_to_frames(runtime, count);
3362 result = snd_pcm_lib_read(substream, buf, count);
3363 if (result > 0)
3364 result = frames_to_bytes(runtime, result);
3365 return result;
3366}
3367
3368static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3369 size_t count, loff_t * offset)
3370{
3371 struct snd_pcm_file *pcm_file;
3372 struct snd_pcm_substream *substream;
3373 struct snd_pcm_runtime *runtime;
3374 snd_pcm_sframes_t result;
3375
3376 pcm_file = file->private_data;
3377 substream = pcm_file->substream;
3378 if (PCM_RUNTIME_CHECK(substream))
3379 return -ENXIO;
3380 runtime = substream->runtime;
3381 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3382 return -EBADFD;
3383 if (!frame_aligned(runtime, count))
3384 return -EINVAL;
3385 count = bytes_to_frames(runtime, count);
3386 result = snd_pcm_lib_write(substream, buf, count);
3387 if (result > 0)
3388 result = frames_to_bytes(runtime, result);
3389 return result;
3390}
3391
3392static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
3393{
3394 struct snd_pcm_file *pcm_file;
3395 struct snd_pcm_substream *substream;
3396 struct snd_pcm_runtime *runtime;
3397 snd_pcm_sframes_t result;
3398 unsigned long i;
3399 void __user **bufs;
3400 snd_pcm_uframes_t frames;
3401
3402 pcm_file = iocb->ki_filp->private_data;
3403 substream = pcm_file->substream;
3404 if (PCM_RUNTIME_CHECK(substream))
3405 return -ENXIO;
3406 runtime = substream->runtime;
3407 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3408 return -EBADFD;
3409 if (!iter_is_iovec(to))
3410 return -EINVAL;
3411 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
3412 return -EINVAL;
3413 if (!frame_aligned(runtime, to->iov->iov_len))
3414 return -EINVAL;
3415 frames = bytes_to_samples(runtime, to->iov->iov_len);
3416 bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL);
3417 if (bufs == NULL)
3418 return -ENOMEM;
3419 for (i = 0; i < to->nr_segs; ++i)
3420 bufs[i] = to->iov[i].iov_base;
3421 result = snd_pcm_lib_readv(substream, bufs, frames);
3422 if (result > 0)
3423 result = frames_to_bytes(runtime, result);
3424 kfree(bufs);
3425 return result;
3426}
3427
3428static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
3429{
3430 struct snd_pcm_file *pcm_file;
3431 struct snd_pcm_substream *substream;
3432 struct snd_pcm_runtime *runtime;
3433 snd_pcm_sframes_t result;
3434 unsigned long i;
3435 void __user **bufs;
3436 snd_pcm_uframes_t frames;
3437
3438 pcm_file = iocb->ki_filp->private_data;
3439 substream = pcm_file->substream;
3440 if (PCM_RUNTIME_CHECK(substream))
3441 return -ENXIO;
3442 runtime = substream->runtime;
3443 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3444 return -EBADFD;
3445 if (!iter_is_iovec(from))
3446 return -EINVAL;
3447 if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
3448 !frame_aligned(runtime, from->iov->iov_len))
3449 return -EINVAL;
3450 frames = bytes_to_samples(runtime, from->iov->iov_len);
3451 bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL);
3452 if (bufs == NULL)
3453 return -ENOMEM;
3454 for (i = 0; i < from->nr_segs; ++i)
3455 bufs[i] = from->iov[i].iov_base;
3456 result = snd_pcm_lib_writev(substream, bufs, frames);
3457 if (result > 0)
3458 result = frames_to_bytes(runtime, result);
3459 kfree(bufs);
3460 return result;
3461}
3462
3463static __poll_t snd_pcm_poll(struct file *file, poll_table *wait)
3464{
3465 struct snd_pcm_file *pcm_file;
3466 struct snd_pcm_substream *substream;
3467 struct snd_pcm_runtime *runtime;
3468 __poll_t mask, ok;
3469 snd_pcm_uframes_t avail;
3470
3471 pcm_file = file->private_data;
3472
3473 substream = pcm_file->substream;
3474 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3475 ok = EPOLLOUT | EPOLLWRNORM;
3476 else
3477 ok = EPOLLIN | EPOLLRDNORM;
3478 if (PCM_RUNTIME_CHECK(substream))
3479 return ok | EPOLLERR;
3480
3481 runtime = substream->runtime;
3482 poll_wait(file, &runtime->sleep, wait);
3483
3484 mask = 0;
3485 snd_pcm_stream_lock_irq(substream);
3486 avail = snd_pcm_avail(substream);
3487 switch (runtime->status->state) {
3488 case SNDRV_PCM_STATE_RUNNING:
3489 case SNDRV_PCM_STATE_PREPARED:
3490 case SNDRV_PCM_STATE_PAUSED:
3491 if (avail >= runtime->control->avail_min)
3492 mask = ok;
3493 break;
3494 case SNDRV_PCM_STATE_DRAINING:
3495 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
3496 mask = ok;
3497 if (!avail)
3498 mask |= EPOLLERR;
3499 }
3500 break;
3501 default:
3502 mask = ok | EPOLLERR;
3503 break;
3504 }
3505 snd_pcm_stream_unlock_irq(substream);
3506 return mask;
3507}
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3518
3519
3520
3521static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf)
3522{
3523 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3524 struct snd_pcm_runtime *runtime;
3525
3526 if (substream == NULL)
3527 return VM_FAULT_SIGBUS;
3528 runtime = substream->runtime;
3529 vmf->page = virt_to_page(runtime->status);
3530 get_page(vmf->page);
3531 return 0;
3532}
3533
3534static const struct vm_operations_struct snd_pcm_vm_ops_status =
3535{
3536 .fault = snd_pcm_mmap_status_fault,
3537};
3538
3539static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3540 struct vm_area_struct *area)
3541{
3542 long size;
3543 if (!(area->vm_flags & VM_READ))
3544 return -EINVAL;
3545 size = area->vm_end - area->vm_start;
3546 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3547 return -EINVAL;
3548 area->vm_ops = &snd_pcm_vm_ops_status;
3549 area->vm_private_data = substream;
3550 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3551 return 0;
3552}
3553
3554
3555
3556
3557static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf)
3558{
3559 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3560 struct snd_pcm_runtime *runtime;
3561
3562 if (substream == NULL)
3563 return VM_FAULT_SIGBUS;
3564 runtime = substream->runtime;
3565 vmf->page = virt_to_page(runtime->control);
3566 get_page(vmf->page);
3567 return 0;
3568}
3569
3570static const struct vm_operations_struct snd_pcm_vm_ops_control =
3571{
3572 .fault = snd_pcm_mmap_control_fault,
3573};
3574
3575static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3576 struct vm_area_struct *area)
3577{
3578 long size;
3579 if (!(area->vm_flags & VM_READ))
3580 return -EINVAL;
3581 size = area->vm_end - area->vm_start;
3582 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3583 return -EINVAL;
3584 area->vm_ops = &snd_pcm_vm_ops_control;
3585 area->vm_private_data = substream;
3586 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3587 return 0;
3588}
3589
3590static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
3591{
3592
3593
3594
3595
3596 if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) &&
3597 (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR))
3598 return false;
3599 return true;
3600}
3601
3602static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
3603{
3604 if (pcm_file->no_compat_mmap)
3605 return false;
3606
3607
3608
3609
3610 if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)
3611 return false;
3612 return true;
3613}
3614
3615#else
3616
3617
3618
3619#define pcm_status_mmap_allowed(pcm_file) false
3620#define pcm_control_mmap_allowed(pcm_file) false
3621
3622static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3623 struct vm_area_struct *area)
3624{
3625 return -ENXIO;
3626}
3627static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3628 struct vm_area_struct *area)
3629{
3630 return -ENXIO;
3631}
3632#endif
3633
3634static inline struct page *
3635snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3636{
3637 void *vaddr = substream->runtime->dma_area + ofs;
3638
3639 switch (substream->dma_buffer.dev.type) {
3640#ifdef CONFIG_SND_DMA_SGBUF
3641 case SNDRV_DMA_TYPE_DEV_SG:
3642 case SNDRV_DMA_TYPE_DEV_UC_SG:
3643 return snd_pcm_sgbuf_ops_page(substream, ofs);
3644#endif
3645 case SNDRV_DMA_TYPE_VMALLOC:
3646 return vmalloc_to_page(vaddr);
3647 default:
3648 return virt_to_page(vaddr);
3649 }
3650}
3651
3652
3653
3654
3655static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf)
3656{
3657 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
3658 struct snd_pcm_runtime *runtime;
3659 unsigned long offset;
3660 struct page * page;
3661 size_t dma_bytes;
3662
3663 if (substream == NULL)
3664 return VM_FAULT_SIGBUS;
3665 runtime = substream->runtime;
3666 offset = vmf->pgoff << PAGE_SHIFT;
3667 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3668 if (offset > dma_bytes - PAGE_SIZE)
3669 return VM_FAULT_SIGBUS;
3670 if (substream->ops->page)
3671 page = substream->ops->page(substream, offset);
3672 else
3673 page = snd_pcm_default_page_ops(substream, offset);
3674 if (!page)
3675 return VM_FAULT_SIGBUS;
3676 get_page(page);
3677 vmf->page = page;
3678 return 0;
3679}
3680
3681static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3682 .open = snd_pcm_mmap_data_open,
3683 .close = snd_pcm_mmap_data_close,
3684};
3685
3686static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3687 .open = snd_pcm_mmap_data_open,
3688 .close = snd_pcm_mmap_data_close,
3689 .fault = snd_pcm_mmap_data_fault,
3690};
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3705 struct vm_area_struct *area)
3706{
3707 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3708#ifdef CONFIG_GENERIC_ALLOCATOR
3709 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3710 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3711 return remap_pfn_range(area, area->vm_start,
3712 substream->dma_buffer.addr >> PAGE_SHIFT,
3713 area->vm_end - area->vm_start, area->vm_page_prot);
3714 }
3715#endif
3716 if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page &&
3717 (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV ||
3718 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_UC))
3719 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3720 area,
3721 substream->runtime->dma_area,
3722 substream->runtime->dma_addr,
3723 substream->runtime->dma_bytes);
3724
3725 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3726 return 0;
3727}
3728EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3729
3730
3731
3732
3733#if SNDRV_PCM_INFO_MMAP_IOMEM
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3744 struct vm_area_struct *area)
3745{
3746 struct snd_pcm_runtime *runtime = substream->runtime;
3747
3748 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3749 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3750}
3751EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3752#endif
3753
3754
3755
3756
3757int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3758 struct vm_area_struct *area)
3759{
3760 struct snd_pcm_runtime *runtime;
3761 long size;
3762 unsigned long offset;
3763 size_t dma_bytes;
3764 int err;
3765
3766 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3767 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3768 return -EINVAL;
3769 } else {
3770 if (!(area->vm_flags & VM_READ))
3771 return -EINVAL;
3772 }
3773 runtime = substream->runtime;
3774 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3775 return -EBADFD;
3776 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3777 return -ENXIO;
3778 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3779 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3780 return -EINVAL;
3781 size = area->vm_end - area->vm_start;
3782 offset = area->vm_pgoff << PAGE_SHIFT;
3783 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3784 if ((size_t)size > dma_bytes)
3785 return -EINVAL;
3786 if (offset > dma_bytes - size)
3787 return -EINVAL;
3788
3789 area->vm_ops = &snd_pcm_vm_ops_data;
3790 area->vm_private_data = substream;
3791 if (substream->ops->mmap)
3792 err = substream->ops->mmap(substream, area);
3793 else
3794 err = snd_pcm_lib_default_mmap(substream, area);
3795 if (!err)
3796 atomic_inc(&substream->mmap_count);
3797 return err;
3798}
3799EXPORT_SYMBOL(snd_pcm_mmap_data);
3800
3801static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3802{
3803 struct snd_pcm_file * pcm_file;
3804 struct snd_pcm_substream *substream;
3805 unsigned long offset;
3806
3807 pcm_file = file->private_data;
3808 substream = pcm_file->substream;
3809 if (PCM_RUNTIME_CHECK(substream))
3810 return -ENXIO;
3811
3812 offset = area->vm_pgoff << PAGE_SHIFT;
3813 switch (offset) {
3814 case SNDRV_PCM_MMAP_OFFSET_STATUS_OLD:
3815 if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT))
3816 return -ENXIO;
3817 fallthrough;
3818 case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW:
3819 if (!pcm_status_mmap_allowed(pcm_file))
3820 return -ENXIO;
3821 return snd_pcm_mmap_status(substream, file, area);
3822 case SNDRV_PCM_MMAP_OFFSET_CONTROL_OLD:
3823 if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT))
3824 return -ENXIO;
3825 fallthrough;
3826 case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW:
3827 if (!pcm_control_mmap_allowed(pcm_file))
3828 return -ENXIO;
3829 return snd_pcm_mmap_control(substream, file, area);
3830 default:
3831 return snd_pcm_mmap_data(substream, file, area);
3832 }
3833 return 0;
3834}
3835
3836static int snd_pcm_fasync(int fd, struct file * file, int on)
3837{
3838 struct snd_pcm_file * pcm_file;
3839 struct snd_pcm_substream *substream;
3840 struct snd_pcm_runtime *runtime;
3841
3842 pcm_file = file->private_data;
3843 substream = pcm_file->substream;
3844 if (PCM_RUNTIME_CHECK(substream))
3845 return -ENXIO;
3846 runtime = substream->runtime;
3847 return fasync_helper(fd, file, on, &runtime->fasync);
3848}
3849
3850
3851
3852
3853#ifdef CONFIG_COMPAT
3854#include "pcm_compat.c"
3855#else
3856#define snd_pcm_ioctl_compat NULL
3857#endif
3858
3859
3860
3861
3862
3863#ifdef CONFIG_SND_SUPPORT_OLD_API
3864#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3865#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3866
3867static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3868 struct snd_pcm_hw_params_old *oparams)
3869{
3870 unsigned int i;
3871
3872 memset(params, 0, sizeof(*params));
3873 params->flags = oparams->flags;
3874 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3875 params->masks[i].bits[0] = oparams->masks[i];
3876 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3877 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3878 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3879 params->info = oparams->info;
3880 params->msbits = oparams->msbits;
3881 params->rate_num = oparams->rate_num;
3882 params->rate_den = oparams->rate_den;
3883 params->fifo_size = oparams->fifo_size;
3884}
3885
3886static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3887 struct snd_pcm_hw_params *params)
3888{
3889 unsigned int i;
3890
3891 memset(oparams, 0, sizeof(*oparams));
3892 oparams->flags = params->flags;
3893 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3894 oparams->masks[i] = params->masks[i].bits[0];
3895 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3896 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3897 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3898 oparams->info = params->info;
3899 oparams->msbits = params->msbits;
3900 oparams->rate_num = params->rate_num;
3901 oparams->rate_den = params->rate_den;
3902 oparams->fifo_size = params->fifo_size;
3903}
3904
3905static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3906 struct snd_pcm_hw_params_old __user * _oparams)
3907{
3908 struct snd_pcm_hw_params *params;
3909 struct snd_pcm_hw_params_old *oparams = NULL;
3910 int err;
3911
3912 params = kmalloc(sizeof(*params), GFP_KERNEL);
3913 if (!params)
3914 return -ENOMEM;
3915
3916 oparams = memdup_user(_oparams, sizeof(*oparams));
3917 if (IS_ERR(oparams)) {
3918 err = PTR_ERR(oparams);
3919 goto out;
3920 }
3921 snd_pcm_hw_convert_from_old_params(params, oparams);
3922 err = snd_pcm_hw_refine(substream, params);
3923 if (err < 0)
3924 goto out_old;
3925
3926 err = fixup_unreferenced_params(substream, params);
3927 if (err < 0)
3928 goto out_old;
3929
3930 snd_pcm_hw_convert_to_old_params(oparams, params);
3931 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3932 err = -EFAULT;
3933out_old:
3934 kfree(oparams);
3935out:
3936 kfree(params);
3937 return err;
3938}
3939
3940static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3941 struct snd_pcm_hw_params_old __user * _oparams)
3942{
3943 struct snd_pcm_hw_params *params;
3944 struct snd_pcm_hw_params_old *oparams = NULL;
3945 int err;
3946
3947 params = kmalloc(sizeof(*params), GFP_KERNEL);
3948 if (!params)
3949 return -ENOMEM;
3950
3951 oparams = memdup_user(_oparams, sizeof(*oparams));
3952 if (IS_ERR(oparams)) {
3953 err = PTR_ERR(oparams);
3954 goto out;
3955 }
3956
3957 snd_pcm_hw_convert_from_old_params(params, oparams);
3958 err = snd_pcm_hw_params(substream, params);
3959 if (err < 0)
3960 goto out_old;
3961
3962 snd_pcm_hw_convert_to_old_params(oparams, params);
3963 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3964 err = -EFAULT;
3965out_old:
3966 kfree(oparams);
3967out:
3968 kfree(params);
3969 return err;
3970}
3971#endif
3972
3973#ifndef CONFIG_MMU
3974static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3975 unsigned long addr,
3976 unsigned long len,
3977 unsigned long pgoff,
3978 unsigned long flags)
3979{
3980 struct snd_pcm_file *pcm_file = file->private_data;
3981 struct snd_pcm_substream *substream = pcm_file->substream;
3982 struct snd_pcm_runtime *runtime = substream->runtime;
3983 unsigned long offset = pgoff << PAGE_SHIFT;
3984
3985 switch (offset) {
3986 case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW:
3987 return (unsigned long)runtime->status;
3988 case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW:
3989 return (unsigned long)runtime->control;
3990 default:
3991 return (unsigned long)runtime->dma_area + offset;
3992 }
3993}
3994#else
3995# define snd_pcm_get_unmapped_area NULL
3996#endif
3997
3998
3999
4000
4001
4002const struct file_operations snd_pcm_f_ops[2] = {
4003 {
4004 .owner = THIS_MODULE,
4005 .write = snd_pcm_write,
4006 .write_iter = snd_pcm_writev,
4007 .open = snd_pcm_playback_open,
4008 .release = snd_pcm_release,
4009 .llseek = no_llseek,
4010 .poll = snd_pcm_poll,
4011 .unlocked_ioctl = snd_pcm_ioctl,
4012 .compat_ioctl = snd_pcm_ioctl_compat,
4013 .mmap = snd_pcm_mmap,
4014 .fasync = snd_pcm_fasync,
4015 .get_unmapped_area = snd_pcm_get_unmapped_area,
4016 },
4017 {
4018 .owner = THIS_MODULE,
4019 .read = snd_pcm_read,
4020 .read_iter = snd_pcm_readv,
4021 .open = snd_pcm_capture_open,
4022 .release = snd_pcm_release,
4023 .llseek = no_llseek,
4024 .poll = snd_pcm_poll,
4025 .unlocked_ioctl = snd_pcm_ioctl,
4026 .compat_ioctl = snd_pcm_ioctl_compat,
4027 .mmap = snd_pcm_mmap,
4028 .fasync = snd_pcm_fasync,
4029 .get_unmapped_area = snd_pcm_get_unmapped_area,
4030 }
4031};
4032