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Merge remote-tracking branch 'asoc/topic/dapm' into asoc-next
[deliverable/linux.git] / sound / core / pcm_native.c
1 /*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <linux/mm.h>
23 #include <linux/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos.h>
28 #include <linux/aio.h>
29 #include <linux/io.h>
30 #include <linux/dma-mapping.h>
31 #include <sound/core.h>
32 #include <sound/control.h>
33 #include <sound/info.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/timer.h>
37 #include <sound/minors.h>
38
39 /*
40 * Compatibility
41 */
42
43 struct snd_pcm_hw_params_old {
44 unsigned int flags;
45 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
46 SNDRV_PCM_HW_PARAM_ACCESS + 1];
47 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
48 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
49 unsigned int rmask;
50 unsigned int cmask;
51 unsigned int info;
52 unsigned int msbits;
53 unsigned int rate_num;
54 unsigned int rate_den;
55 snd_pcm_uframes_t fifo_size;
56 unsigned char reserved[64];
57 };
58
59 #ifdef CONFIG_SND_SUPPORT_OLD_API
60 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
61 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
62
63 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
64 struct snd_pcm_hw_params_old __user * _oparams);
65 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
66 struct snd_pcm_hw_params_old __user * _oparams);
67 #endif
68 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
69
70 /*
71 *
72 */
73
74 static DEFINE_RWLOCK(snd_pcm_link_rwlock);
75 static DECLARE_RWSEM(snd_pcm_link_rwsem);
76
77 /**
78 * snd_pcm_stream_lock - Lock the PCM stream
79 * @substream: PCM substream
80 *
81 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
82 * flag of the given substream. This also takes the global link rw lock
83 * (or rw sem), too, for avoiding the race with linked streams.
84 */
85 void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
86 {
87 if (substream->pcm->nonatomic) {
88 down_read(&snd_pcm_link_rwsem);
89 mutex_lock(&substream->self_group.mutex);
90 } else {
91 read_lock(&snd_pcm_link_rwlock);
92 spin_lock(&substream->self_group.lock);
93 }
94 }
95 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
96
97 /**
98 * snd_pcm_stream_lock - Unlock the PCM stream
99 * @substream: PCM substream
100 *
101 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
102 */
103 void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
104 {
105 if (substream->pcm->nonatomic) {
106 mutex_unlock(&substream->self_group.mutex);
107 up_read(&snd_pcm_link_rwsem);
108 } else {
109 spin_unlock(&substream->self_group.lock);
110 read_unlock(&snd_pcm_link_rwlock);
111 }
112 }
113 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
114
115 /**
116 * snd_pcm_stream_lock_irq - Lock the PCM stream
117 * @substream: PCM substream
118 *
119 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
120 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
121 * as snd_pcm_stream_lock().
122 */
123 void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
124 {
125 if (!substream->pcm->nonatomic)
126 local_irq_disable();
127 snd_pcm_stream_lock(substream);
128 }
129 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
130
131 /**
132 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
133 * @substream: PCM substream
134 *
135 * This is a counter-part of snd_pcm_stream_lock_irq().
136 */
137 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
138 {
139 snd_pcm_stream_unlock(substream);
140 if (!substream->pcm->nonatomic)
141 local_irq_enable();
142 }
143 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
144
145 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
146 {
147 unsigned long flags = 0;
148 if (!substream->pcm->nonatomic)
149 local_irq_save(flags);
150 snd_pcm_stream_lock(substream);
151 return flags;
152 }
153 EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
154
155 /**
156 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
157 * @substream: PCM substream
158 * @flags: irq flags
159 *
160 * This is a counter-part of snd_pcm_stream_lock_irqsave().
161 */
162 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
163 unsigned long flags)
164 {
165 snd_pcm_stream_unlock(substream);
166 if (!substream->pcm->nonatomic)
167 local_irq_restore(flags);
168 }
169 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
170
171 static inline mm_segment_t snd_enter_user(void)
172 {
173 mm_segment_t fs = get_fs();
174 set_fs(get_ds());
175 return fs;
176 }
177
178 static inline void snd_leave_user(mm_segment_t fs)
179 {
180 set_fs(fs);
181 }
182
183
184
185 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
186 {
187 struct snd_pcm_runtime *runtime;
188 struct snd_pcm *pcm = substream->pcm;
189 struct snd_pcm_str *pstr = substream->pstr;
190
191 memset(info, 0, sizeof(*info));
192 info->card = pcm->card->number;
193 info->device = pcm->device;
194 info->stream = substream->stream;
195 info->subdevice = substream->number;
196 strlcpy(info->id, pcm->id, sizeof(info->id));
197 strlcpy(info->name, pcm->name, sizeof(info->name));
198 info->dev_class = pcm->dev_class;
199 info->dev_subclass = pcm->dev_subclass;
200 info->subdevices_count = pstr->substream_count;
201 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
202 strlcpy(info->subname, substream->name, sizeof(info->subname));
203 runtime = substream->runtime;
204 /* AB: FIXME!!! This is definitely nonsense */
205 if (runtime) {
206 info->sync = runtime->sync;
207 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
208 }
209 return 0;
210 }
211
212 int snd_pcm_info_user(struct snd_pcm_substream *substream,
213 struct snd_pcm_info __user * _info)
214 {
215 struct snd_pcm_info *info;
216 int err;
217
218 info = kmalloc(sizeof(*info), GFP_KERNEL);
219 if (! info)
220 return -ENOMEM;
221 err = snd_pcm_info(substream, info);
222 if (err >= 0) {
223 if (copy_to_user(_info, info, sizeof(*info)))
224 err = -EFAULT;
225 }
226 kfree(info);
227 return err;
228 }
229
230 static bool hw_support_mmap(struct snd_pcm_substream *substream)
231 {
232 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
233 return false;
234 /* check architectures that return -EINVAL from dma_mmap_coherent() */
235 /* FIXME: this should be some global flag */
236 #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
237 defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
238 if (!substream->ops->mmap &&
239 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
240 return false;
241 #endif
242 return true;
243 }
244
245 #undef RULES_DEBUG
246
247 #ifdef RULES_DEBUG
248 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
249 static const char * const snd_pcm_hw_param_names[] = {
250 HW_PARAM(ACCESS),
251 HW_PARAM(FORMAT),
252 HW_PARAM(SUBFORMAT),
253 HW_PARAM(SAMPLE_BITS),
254 HW_PARAM(FRAME_BITS),
255 HW_PARAM(CHANNELS),
256 HW_PARAM(RATE),
257 HW_PARAM(PERIOD_TIME),
258 HW_PARAM(PERIOD_SIZE),
259 HW_PARAM(PERIOD_BYTES),
260 HW_PARAM(PERIODS),
261 HW_PARAM(BUFFER_TIME),
262 HW_PARAM(BUFFER_SIZE),
263 HW_PARAM(BUFFER_BYTES),
264 HW_PARAM(TICK_TIME),
265 };
266 #endif
267
268 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
269 struct snd_pcm_hw_params *params)
270 {
271 unsigned int k;
272 struct snd_pcm_hardware *hw;
273 struct snd_interval *i = NULL;
274 struct snd_mask *m = NULL;
275 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
276 unsigned int rstamps[constrs->rules_num];
277 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
278 unsigned int stamp = 2;
279 int changed, again;
280
281 params->info = 0;
282 params->fifo_size = 0;
283 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
284 params->msbits = 0;
285 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
286 params->rate_num = 0;
287 params->rate_den = 0;
288 }
289
290 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
291 m = hw_param_mask(params, k);
292 if (snd_mask_empty(m))
293 return -EINVAL;
294 if (!(params->rmask & (1 << k)))
295 continue;
296 #ifdef RULES_DEBUG
297 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
298 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
299 #endif
300 changed = snd_mask_refine(m, constrs_mask(constrs, k));
301 #ifdef RULES_DEBUG
302 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
303 #endif
304 if (changed)
305 params->cmask |= 1 << k;
306 if (changed < 0)
307 return changed;
308 }
309
310 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
311 i = hw_param_interval(params, k);
312 if (snd_interval_empty(i))
313 return -EINVAL;
314 if (!(params->rmask & (1 << k)))
315 continue;
316 #ifdef RULES_DEBUG
317 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
318 if (i->empty)
319 pr_cont("empty");
320 else
321 pr_cont("%c%u %u%c",
322 i->openmin ? '(' : '[', i->min,
323 i->max, i->openmax ? ')' : ']');
324 pr_cont(" -> ");
325 #endif
326 changed = snd_interval_refine(i, constrs_interval(constrs, k));
327 #ifdef RULES_DEBUG
328 if (i->empty)
329 pr_cont("empty\n");
330 else
331 pr_cont("%c%u %u%c\n",
332 i->openmin ? '(' : '[', i->min,
333 i->max, i->openmax ? ')' : ']');
334 #endif
335 if (changed)
336 params->cmask |= 1 << k;
337 if (changed < 0)
338 return changed;
339 }
340
341 for (k = 0; k < constrs->rules_num; k++)
342 rstamps[k] = 0;
343 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
344 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
345 do {
346 again = 0;
347 for (k = 0; k < constrs->rules_num; k++) {
348 struct snd_pcm_hw_rule *r = &constrs->rules[k];
349 unsigned int d;
350 int doit = 0;
351 if (r->cond && !(r->cond & params->flags))
352 continue;
353 for (d = 0; r->deps[d] >= 0; d++) {
354 if (vstamps[r->deps[d]] > rstamps[k]) {
355 doit = 1;
356 break;
357 }
358 }
359 if (!doit)
360 continue;
361 #ifdef RULES_DEBUG
362 pr_debug("Rule %d [%p]: ", k, r->func);
363 if (r->var >= 0) {
364 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]);
365 if (hw_is_mask(r->var)) {
366 m = hw_param_mask(params, r->var);
367 pr_cont("%x", *m->bits);
368 } else {
369 i = hw_param_interval(params, r->var);
370 if (i->empty)
371 pr_cont("empty");
372 else
373 pr_cont("%c%u %u%c",
374 i->openmin ? '(' : '[', i->min,
375 i->max, i->openmax ? ')' : ']');
376 }
377 }
378 #endif
379 changed = r->func(params, r);
380 #ifdef RULES_DEBUG
381 if (r->var >= 0) {
382 pr_cont(" -> ");
383 if (hw_is_mask(r->var))
384 pr_cont("%x", *m->bits);
385 else {
386 if (i->empty)
387 pr_cont("empty");
388 else
389 pr_cont("%c%u %u%c",
390 i->openmin ? '(' : '[', i->min,
391 i->max, i->openmax ? ')' : ']');
392 }
393 }
394 pr_cont("\n");
395 #endif
396 rstamps[k] = stamp;
397 if (changed && r->var >= 0) {
398 params->cmask |= (1 << r->var);
399 vstamps[r->var] = stamp;
400 again = 1;
401 }
402 if (changed < 0)
403 return changed;
404 stamp++;
405 }
406 } while (again);
407 if (!params->msbits) {
408 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
409 if (snd_interval_single(i))
410 params->msbits = snd_interval_value(i);
411 }
412
413 if (!params->rate_den) {
414 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
415 if (snd_interval_single(i)) {
416 params->rate_num = snd_interval_value(i);
417 params->rate_den = 1;
418 }
419 }
420
421 hw = &substream->runtime->hw;
422 if (!params->info) {
423 params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
424 SNDRV_PCM_INFO_DRAIN_TRIGGER);
425 if (!hw_support_mmap(substream))
426 params->info &= ~(SNDRV_PCM_INFO_MMAP |
427 SNDRV_PCM_INFO_MMAP_VALID);
428 }
429 if (!params->fifo_size) {
430 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
431 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
432 if (snd_mask_min(m) == snd_mask_max(m) &&
433 snd_interval_min(i) == snd_interval_max(i)) {
434 changed = substream->ops->ioctl(substream,
435 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
436 if (changed < 0)
437 return changed;
438 }
439 }
440 params->rmask = 0;
441 return 0;
442 }
443
444 EXPORT_SYMBOL(snd_pcm_hw_refine);
445
446 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
447 struct snd_pcm_hw_params __user * _params)
448 {
449 struct snd_pcm_hw_params *params;
450 int err;
451
452 params = memdup_user(_params, sizeof(*params));
453 if (IS_ERR(params))
454 return PTR_ERR(params);
455
456 err = snd_pcm_hw_refine(substream, params);
457 if (copy_to_user(_params, params, sizeof(*params))) {
458 if (!err)
459 err = -EFAULT;
460 }
461
462 kfree(params);
463 return err;
464 }
465
466 static int period_to_usecs(struct snd_pcm_runtime *runtime)
467 {
468 int usecs;
469
470 if (! runtime->rate)
471 return -1; /* invalid */
472
473 /* take 75% of period time as the deadline */
474 usecs = (750000 / runtime->rate) * runtime->period_size;
475 usecs += ((750000 % runtime->rate) * runtime->period_size) /
476 runtime->rate;
477
478 return usecs;
479 }
480
481 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
482 {
483 snd_pcm_stream_lock_irq(substream);
484 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
485 substream->runtime->status->state = state;
486 snd_pcm_stream_unlock_irq(substream);
487 }
488
489 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
490 struct snd_pcm_hw_params *params)
491 {
492 struct snd_pcm_runtime *runtime;
493 int err, usecs;
494 unsigned int bits;
495 snd_pcm_uframes_t frames;
496
497 if (PCM_RUNTIME_CHECK(substream))
498 return -ENXIO;
499 runtime = substream->runtime;
500 snd_pcm_stream_lock_irq(substream);
501 switch (runtime->status->state) {
502 case SNDRV_PCM_STATE_OPEN:
503 case SNDRV_PCM_STATE_SETUP:
504 case SNDRV_PCM_STATE_PREPARED:
505 break;
506 default:
507 snd_pcm_stream_unlock_irq(substream);
508 return -EBADFD;
509 }
510 snd_pcm_stream_unlock_irq(substream);
511 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
512 if (!substream->oss.oss)
513 #endif
514 if (atomic_read(&substream->mmap_count))
515 return -EBADFD;
516
517 params->rmask = ~0U;
518 err = snd_pcm_hw_refine(substream, params);
519 if (err < 0)
520 goto _error;
521
522 err = snd_pcm_hw_params_choose(substream, params);
523 if (err < 0)
524 goto _error;
525
526 if (substream->ops->hw_params != NULL) {
527 err = substream->ops->hw_params(substream, params);
528 if (err < 0)
529 goto _error;
530 }
531
532 runtime->access = params_access(params);
533 runtime->format = params_format(params);
534 runtime->subformat = params_subformat(params);
535 runtime->channels = params_channels(params);
536 runtime->rate = params_rate(params);
537 runtime->period_size = params_period_size(params);
538 runtime->periods = params_periods(params);
539 runtime->buffer_size = params_buffer_size(params);
540 runtime->info = params->info;
541 runtime->rate_num = params->rate_num;
542 runtime->rate_den = params->rate_den;
543 runtime->no_period_wakeup =
544 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
545 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
546
547 bits = snd_pcm_format_physical_width(runtime->format);
548 runtime->sample_bits = bits;
549 bits *= runtime->channels;
550 runtime->frame_bits = bits;
551 frames = 1;
552 while (bits % 8 != 0) {
553 bits *= 2;
554 frames *= 2;
555 }
556 runtime->byte_align = bits / 8;
557 runtime->min_align = frames;
558
559 /* Default sw params */
560 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
561 runtime->period_step = 1;
562 runtime->control->avail_min = runtime->period_size;
563 runtime->start_threshold = 1;
564 runtime->stop_threshold = runtime->buffer_size;
565 runtime->silence_threshold = 0;
566 runtime->silence_size = 0;
567 runtime->boundary = runtime->buffer_size;
568 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
569 runtime->boundary *= 2;
570
571 snd_pcm_timer_resolution_change(substream);
572 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
573
574 if (pm_qos_request_active(&substream->latency_pm_qos_req))
575 pm_qos_remove_request(&substream->latency_pm_qos_req);
576 if ((usecs = period_to_usecs(runtime)) >= 0)
577 pm_qos_add_request(&substream->latency_pm_qos_req,
578 PM_QOS_CPU_DMA_LATENCY, usecs);
579 return 0;
580 _error:
581 /* hardware might be unusable from this time,
582 so we force application to retry to set
583 the correct hardware parameter settings */
584 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
585 if (substream->ops->hw_free != NULL)
586 substream->ops->hw_free(substream);
587 return err;
588 }
589
590 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
591 struct snd_pcm_hw_params __user * _params)
592 {
593 struct snd_pcm_hw_params *params;
594 int err;
595
596 params = memdup_user(_params, sizeof(*params));
597 if (IS_ERR(params))
598 return PTR_ERR(params);
599
600 err = snd_pcm_hw_params(substream, params);
601 if (copy_to_user(_params, params, sizeof(*params))) {
602 if (!err)
603 err = -EFAULT;
604 }
605
606 kfree(params);
607 return err;
608 }
609
610 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
611 {
612 struct snd_pcm_runtime *runtime;
613 int result = 0;
614
615 if (PCM_RUNTIME_CHECK(substream))
616 return -ENXIO;
617 runtime = substream->runtime;
618 snd_pcm_stream_lock_irq(substream);
619 switch (runtime->status->state) {
620 case SNDRV_PCM_STATE_SETUP:
621 case SNDRV_PCM_STATE_PREPARED:
622 break;
623 default:
624 snd_pcm_stream_unlock_irq(substream);
625 return -EBADFD;
626 }
627 snd_pcm_stream_unlock_irq(substream);
628 if (atomic_read(&substream->mmap_count))
629 return -EBADFD;
630 if (substream->ops->hw_free)
631 result = substream->ops->hw_free(substream);
632 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
633 pm_qos_remove_request(&substream->latency_pm_qos_req);
634 return result;
635 }
636
637 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
638 struct snd_pcm_sw_params *params)
639 {
640 struct snd_pcm_runtime *runtime;
641 int err;
642
643 if (PCM_RUNTIME_CHECK(substream))
644 return -ENXIO;
645 runtime = substream->runtime;
646 snd_pcm_stream_lock_irq(substream);
647 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
648 snd_pcm_stream_unlock_irq(substream);
649 return -EBADFD;
650 }
651 snd_pcm_stream_unlock_irq(substream);
652
653 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
654 return -EINVAL;
655 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
656 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
657 return -EINVAL;
658 if (params->avail_min == 0)
659 return -EINVAL;
660 if (params->silence_size >= runtime->boundary) {
661 if (params->silence_threshold != 0)
662 return -EINVAL;
663 } else {
664 if (params->silence_size > params->silence_threshold)
665 return -EINVAL;
666 if (params->silence_threshold > runtime->buffer_size)
667 return -EINVAL;
668 }
669 err = 0;
670 snd_pcm_stream_lock_irq(substream);
671 runtime->tstamp_mode = params->tstamp_mode;
672 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
673 runtime->tstamp_type = params->tstamp_type;
674 runtime->period_step = params->period_step;
675 runtime->control->avail_min = params->avail_min;
676 runtime->start_threshold = params->start_threshold;
677 runtime->stop_threshold = params->stop_threshold;
678 runtime->silence_threshold = params->silence_threshold;
679 runtime->silence_size = params->silence_size;
680 params->boundary = runtime->boundary;
681 if (snd_pcm_running(substream)) {
682 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
683 runtime->silence_size > 0)
684 snd_pcm_playback_silence(substream, ULONG_MAX);
685 err = snd_pcm_update_state(substream, runtime);
686 }
687 snd_pcm_stream_unlock_irq(substream);
688 return err;
689 }
690
691 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
692 struct snd_pcm_sw_params __user * _params)
693 {
694 struct snd_pcm_sw_params params;
695 int err;
696 if (copy_from_user(&params, _params, sizeof(params)))
697 return -EFAULT;
698 err = snd_pcm_sw_params(substream, &params);
699 if (copy_to_user(_params, &params, sizeof(params)))
700 return -EFAULT;
701 return err;
702 }
703
704 int snd_pcm_status(struct snd_pcm_substream *substream,
705 struct snd_pcm_status *status)
706 {
707 struct snd_pcm_runtime *runtime = substream->runtime;
708
709 snd_pcm_stream_lock_irq(substream);
710 status->state = runtime->status->state;
711 status->suspended_state = runtime->status->suspended_state;
712 if (status->state == SNDRV_PCM_STATE_OPEN)
713 goto _end;
714 status->trigger_tstamp = runtime->trigger_tstamp;
715 if (snd_pcm_running(substream)) {
716 snd_pcm_update_hw_ptr(substream);
717 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
718 status->tstamp = runtime->status->tstamp;
719 status->audio_tstamp =
720 runtime->status->audio_tstamp;
721 goto _tstamp_end;
722 }
723 } else {
724 /* get tstamp only in fallback mode and only if enabled */
725 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
726 snd_pcm_gettime(runtime, &status->tstamp);
727 }
728 _tstamp_end:
729 status->appl_ptr = runtime->control->appl_ptr;
730 status->hw_ptr = runtime->status->hw_ptr;
731 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
732 status->avail = snd_pcm_playback_avail(runtime);
733 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
734 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
735 status->delay = runtime->buffer_size - status->avail;
736 status->delay += runtime->delay;
737 } else
738 status->delay = 0;
739 } else {
740 status->avail = snd_pcm_capture_avail(runtime);
741 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
742 status->delay = status->avail + runtime->delay;
743 else
744 status->delay = 0;
745 }
746 status->avail_max = runtime->avail_max;
747 status->overrange = runtime->overrange;
748 runtime->avail_max = 0;
749 runtime->overrange = 0;
750 _end:
751 snd_pcm_stream_unlock_irq(substream);
752 return 0;
753 }
754
755 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
756 struct snd_pcm_status __user * _status)
757 {
758 struct snd_pcm_status status;
759 int res;
760
761 memset(&status, 0, sizeof(status));
762 res = snd_pcm_status(substream, &status);
763 if (res < 0)
764 return res;
765 if (copy_to_user(_status, &status, sizeof(status)))
766 return -EFAULT;
767 return 0;
768 }
769
770 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
771 struct snd_pcm_channel_info * info)
772 {
773 struct snd_pcm_runtime *runtime;
774 unsigned int channel;
775
776 channel = info->channel;
777 runtime = substream->runtime;
778 snd_pcm_stream_lock_irq(substream);
779 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
780 snd_pcm_stream_unlock_irq(substream);
781 return -EBADFD;
782 }
783 snd_pcm_stream_unlock_irq(substream);
784 if (channel >= runtime->channels)
785 return -EINVAL;
786 memset(info, 0, sizeof(*info));
787 info->channel = channel;
788 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
789 }
790
791 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
792 struct snd_pcm_channel_info __user * _info)
793 {
794 struct snd_pcm_channel_info info;
795 int res;
796
797 if (copy_from_user(&info, _info, sizeof(info)))
798 return -EFAULT;
799 res = snd_pcm_channel_info(substream, &info);
800 if (res < 0)
801 return res;
802 if (copy_to_user(_info, &info, sizeof(info)))
803 return -EFAULT;
804 return 0;
805 }
806
807 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
808 {
809 struct snd_pcm_runtime *runtime = substream->runtime;
810 if (runtime->trigger_master == NULL)
811 return;
812 if (runtime->trigger_master == substream) {
813 if (!runtime->trigger_tstamp_latched)
814 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
815 } else {
816 snd_pcm_trigger_tstamp(runtime->trigger_master);
817 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
818 }
819 runtime->trigger_master = NULL;
820 }
821
822 struct action_ops {
823 int (*pre_action)(struct snd_pcm_substream *substream, int state);
824 int (*do_action)(struct snd_pcm_substream *substream, int state);
825 void (*undo_action)(struct snd_pcm_substream *substream, int state);
826 void (*post_action)(struct snd_pcm_substream *substream, int state);
827 };
828
829 /*
830 * this functions is core for handling of linked stream
831 * Note: the stream state might be changed also on failure
832 * Note2: call with calling stream lock + link lock
833 */
834 static int snd_pcm_action_group(struct action_ops *ops,
835 struct snd_pcm_substream *substream,
836 int state, int do_lock)
837 {
838 struct snd_pcm_substream *s = NULL;
839 struct snd_pcm_substream *s1;
840 int res = 0, depth = 1;
841
842 snd_pcm_group_for_each_entry(s, substream) {
843 if (do_lock && s != substream) {
844 if (s->pcm->nonatomic)
845 mutex_lock_nested(&s->self_group.mutex, depth);
846 else
847 spin_lock_nested(&s->self_group.lock, depth);
848 depth++;
849 }
850 res = ops->pre_action(s, state);
851 if (res < 0)
852 goto _unlock;
853 }
854 snd_pcm_group_for_each_entry(s, substream) {
855 res = ops->do_action(s, state);
856 if (res < 0) {
857 if (ops->undo_action) {
858 snd_pcm_group_for_each_entry(s1, substream) {
859 if (s1 == s) /* failed stream */
860 break;
861 ops->undo_action(s1, state);
862 }
863 }
864 s = NULL; /* unlock all */
865 goto _unlock;
866 }
867 }
868 snd_pcm_group_for_each_entry(s, substream) {
869 ops->post_action(s, state);
870 }
871 _unlock:
872 if (do_lock) {
873 /* unlock streams */
874 snd_pcm_group_for_each_entry(s1, substream) {
875 if (s1 != substream) {
876 if (s1->pcm->nonatomic)
877 mutex_unlock(&s1->self_group.mutex);
878 else
879 spin_unlock(&s1->self_group.lock);
880 }
881 if (s1 == s) /* end */
882 break;
883 }
884 }
885 return res;
886 }
887
888 /*
889 * Note: call with stream lock
890 */
891 static int snd_pcm_action_single(struct action_ops *ops,
892 struct snd_pcm_substream *substream,
893 int state)
894 {
895 int res;
896
897 res = ops->pre_action(substream, state);
898 if (res < 0)
899 return res;
900 res = ops->do_action(substream, state);
901 if (res == 0)
902 ops->post_action(substream, state);
903 else if (ops->undo_action)
904 ops->undo_action(substream, state);
905 return res;
906 }
907
908 /*
909 * Note: call with stream lock
910 */
911 static int snd_pcm_action(struct action_ops *ops,
912 struct snd_pcm_substream *substream,
913 int state)
914 {
915 int res;
916
917 if (!snd_pcm_stream_linked(substream))
918 return snd_pcm_action_single(ops, substream, state);
919
920 if (substream->pcm->nonatomic) {
921 if (!mutex_trylock(&substream->group->mutex)) {
922 mutex_unlock(&substream->self_group.mutex);
923 mutex_lock(&substream->group->mutex);
924 mutex_lock(&substream->self_group.mutex);
925 }
926 res = snd_pcm_action_group(ops, substream, state, 1);
927 mutex_unlock(&substream->group->mutex);
928 } else {
929 if (!spin_trylock(&substream->group->lock)) {
930 spin_unlock(&substream->self_group.lock);
931 spin_lock(&substream->group->lock);
932 spin_lock(&substream->self_group.lock);
933 }
934 res = snd_pcm_action_group(ops, substream, state, 1);
935 spin_unlock(&substream->group->lock);
936 }
937 return res;
938 }
939
940 /*
941 * Note: don't use any locks before
942 */
943 static int snd_pcm_action_lock_irq(struct action_ops *ops,
944 struct snd_pcm_substream *substream,
945 int state)
946 {
947 int res;
948
949 snd_pcm_stream_lock_irq(substream);
950 res = snd_pcm_action(ops, substream, state);
951 snd_pcm_stream_unlock_irq(substream);
952 return res;
953 }
954
955 /*
956 */
957 static int snd_pcm_action_nonatomic(struct action_ops *ops,
958 struct snd_pcm_substream *substream,
959 int state)
960 {
961 int res;
962
963 down_read(&snd_pcm_link_rwsem);
964 if (snd_pcm_stream_linked(substream))
965 res = snd_pcm_action_group(ops, substream, state, 0);
966 else
967 res = snd_pcm_action_single(ops, substream, state);
968 up_read(&snd_pcm_link_rwsem);
969 return res;
970 }
971
972 /*
973 * start callbacks
974 */
975 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
976 {
977 struct snd_pcm_runtime *runtime = substream->runtime;
978 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
979 return -EBADFD;
980 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
981 !snd_pcm_playback_data(substream))
982 return -EPIPE;
983 runtime->trigger_tstamp_latched = false;
984 runtime->trigger_master = substream;
985 return 0;
986 }
987
988 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
989 {
990 if (substream->runtime->trigger_master != substream)
991 return 0;
992 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
993 }
994
995 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
996 {
997 if (substream->runtime->trigger_master == substream)
998 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
999 }
1000
1001 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1002 {
1003 struct snd_pcm_runtime *runtime = substream->runtime;
1004 snd_pcm_trigger_tstamp(substream);
1005 runtime->hw_ptr_jiffies = jiffies;
1006 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1007 runtime->rate;
1008 runtime->status->state = state;
1009 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1010 runtime->silence_size > 0)
1011 snd_pcm_playback_silence(substream, ULONG_MAX);
1012 if (substream->timer)
1013 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
1014 &runtime->trigger_tstamp);
1015 }
1016
1017 static struct action_ops snd_pcm_action_start = {
1018 .pre_action = snd_pcm_pre_start,
1019 .do_action = snd_pcm_do_start,
1020 .undo_action = snd_pcm_undo_start,
1021 .post_action = snd_pcm_post_start
1022 };
1023
1024 /**
1025 * snd_pcm_start - start all linked streams
1026 * @substream: the PCM substream instance
1027 *
1028 * Return: Zero if successful, or a negative error code.
1029 */
1030 int snd_pcm_start(struct snd_pcm_substream *substream)
1031 {
1032 return snd_pcm_action(&snd_pcm_action_start, substream,
1033 SNDRV_PCM_STATE_RUNNING);
1034 }
1035
1036 /*
1037 * stop callbacks
1038 */
1039 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1040 {
1041 struct snd_pcm_runtime *runtime = substream->runtime;
1042 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1043 return -EBADFD;
1044 runtime->trigger_master = substream;
1045 return 0;
1046 }
1047
1048 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1049 {
1050 if (substream->runtime->trigger_master == substream &&
1051 snd_pcm_running(substream))
1052 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1053 return 0; /* unconditonally stop all substreams */
1054 }
1055
1056 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1057 {
1058 struct snd_pcm_runtime *runtime = substream->runtime;
1059 if (runtime->status->state != state) {
1060 snd_pcm_trigger_tstamp(substream);
1061 runtime->status->state = state;
1062 if (substream->timer)
1063 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
1064 &runtime->trigger_tstamp);
1065 }
1066 wake_up(&runtime->sleep);
1067 wake_up(&runtime->tsleep);
1068 }
1069
1070 static struct action_ops snd_pcm_action_stop = {
1071 .pre_action = snd_pcm_pre_stop,
1072 .do_action = snd_pcm_do_stop,
1073 .post_action = snd_pcm_post_stop
1074 };
1075
1076 /**
1077 * snd_pcm_stop - try to stop all running streams in the substream group
1078 * @substream: the PCM substream instance
1079 * @state: PCM state after stopping the stream
1080 *
1081 * The state of each stream is then changed to the given state unconditionally.
1082 *
1083 * Return: Zero if successful, or a negative error code.
1084 */
1085 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1086 {
1087 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1088 }
1089
1090 EXPORT_SYMBOL(snd_pcm_stop);
1091
1092 /**
1093 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1094 * @substream: the PCM substream
1095 *
1096 * After stopping, the state is changed to SETUP.
1097 * Unlike snd_pcm_stop(), this affects only the given stream.
1098 *
1099 * Return: Zero if succesful, or a negative error code.
1100 */
1101 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1102 {
1103 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1104 SNDRV_PCM_STATE_SETUP);
1105 }
1106
1107 /**
1108 * snd_pcm_stop_xrun - stop the running streams as XRUN
1109 * @substream: the PCM substream instance
1110 *
1111 * This stops the given running substream (and all linked substreams) as XRUN.
1112 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1113 *
1114 * Return: Zero if successful, or a negative error code.
1115 */
1116 int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1117 {
1118 unsigned long flags;
1119 int ret = 0;
1120
1121 snd_pcm_stream_lock_irqsave(substream, flags);
1122 if (snd_pcm_running(substream))
1123 ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1124 snd_pcm_stream_unlock_irqrestore(substream, flags);
1125 return ret;
1126 }
1127 EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1128
1129 /*
1130 * pause callbacks
1131 */
1132 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1133 {
1134 struct snd_pcm_runtime *runtime = substream->runtime;
1135 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1136 return -ENOSYS;
1137 if (push) {
1138 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1139 return -EBADFD;
1140 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1141 return -EBADFD;
1142 runtime->trigger_master = substream;
1143 return 0;
1144 }
1145
1146 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1147 {
1148 if (substream->runtime->trigger_master != substream)
1149 return 0;
1150 /* some drivers might use hw_ptr to recover from the pause -
1151 update the hw_ptr now */
1152 if (push)
1153 snd_pcm_update_hw_ptr(substream);
1154 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1155 * a delta between the current jiffies, this gives a large enough
1156 * delta, effectively to skip the check once.
1157 */
1158 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1159 return substream->ops->trigger(substream,
1160 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1161 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1162 }
1163
1164 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1165 {
1166 if (substream->runtime->trigger_master == substream)
1167 substream->ops->trigger(substream,
1168 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1169 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1170 }
1171
1172 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1173 {
1174 struct snd_pcm_runtime *runtime = substream->runtime;
1175 snd_pcm_trigger_tstamp(substream);
1176 if (push) {
1177 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1178 if (substream->timer)
1179 snd_timer_notify(substream->timer,
1180 SNDRV_TIMER_EVENT_MPAUSE,
1181 &runtime->trigger_tstamp);
1182 wake_up(&runtime->sleep);
1183 wake_up(&runtime->tsleep);
1184 } else {
1185 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1186 if (substream->timer)
1187 snd_timer_notify(substream->timer,
1188 SNDRV_TIMER_EVENT_MCONTINUE,
1189 &runtime->trigger_tstamp);
1190 }
1191 }
1192
1193 static struct action_ops snd_pcm_action_pause = {
1194 .pre_action = snd_pcm_pre_pause,
1195 .do_action = snd_pcm_do_pause,
1196 .undo_action = snd_pcm_undo_pause,
1197 .post_action = snd_pcm_post_pause
1198 };
1199
1200 /*
1201 * Push/release the pause for all linked streams.
1202 */
1203 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1204 {
1205 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1206 }
1207
1208 #ifdef CONFIG_PM
1209 /* suspend */
1210
1211 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1212 {
1213 struct snd_pcm_runtime *runtime = substream->runtime;
1214 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1215 return -EBUSY;
1216 runtime->trigger_master = substream;
1217 return 0;
1218 }
1219
1220 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1221 {
1222 struct snd_pcm_runtime *runtime = substream->runtime;
1223 if (runtime->trigger_master != substream)
1224 return 0;
1225 if (! snd_pcm_running(substream))
1226 return 0;
1227 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1228 return 0; /* suspend unconditionally */
1229 }
1230
1231 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1232 {
1233 struct snd_pcm_runtime *runtime = substream->runtime;
1234 snd_pcm_trigger_tstamp(substream);
1235 runtime->status->suspended_state = runtime->status->state;
1236 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1237 if (substream->timer)
1238 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1239 &runtime->trigger_tstamp);
1240 wake_up(&runtime->sleep);
1241 wake_up(&runtime->tsleep);
1242 }
1243
1244 static struct action_ops snd_pcm_action_suspend = {
1245 .pre_action = snd_pcm_pre_suspend,
1246 .do_action = snd_pcm_do_suspend,
1247 .post_action = snd_pcm_post_suspend
1248 };
1249
1250 /**
1251 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1252 * @substream: the PCM substream
1253 *
1254 * After this call, all streams are changed to SUSPENDED state.
1255 *
1256 * Return: Zero if successful (or @substream is %NULL), or a negative error
1257 * code.
1258 */
1259 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1260 {
1261 int err;
1262 unsigned long flags;
1263
1264 if (! substream)
1265 return 0;
1266
1267 snd_pcm_stream_lock_irqsave(substream, flags);
1268 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1269 snd_pcm_stream_unlock_irqrestore(substream, flags);
1270 return err;
1271 }
1272
1273 EXPORT_SYMBOL(snd_pcm_suspend);
1274
1275 /**
1276 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1277 * @pcm: the PCM instance
1278 *
1279 * After this call, all streams are changed to SUSPENDED state.
1280 *
1281 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1282 */
1283 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1284 {
1285 struct snd_pcm_substream *substream;
1286 int stream, err = 0;
1287
1288 if (! pcm)
1289 return 0;
1290
1291 for (stream = 0; stream < 2; stream++) {
1292 for (substream = pcm->streams[stream].substream;
1293 substream; substream = substream->next) {
1294 /* FIXME: the open/close code should lock this as well */
1295 if (substream->runtime == NULL)
1296 continue;
1297 err = snd_pcm_suspend(substream);
1298 if (err < 0 && err != -EBUSY)
1299 return err;
1300 }
1301 }
1302 return 0;
1303 }
1304
1305 EXPORT_SYMBOL(snd_pcm_suspend_all);
1306
1307 /* resume */
1308
1309 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1310 {
1311 struct snd_pcm_runtime *runtime = substream->runtime;
1312 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1313 return -ENOSYS;
1314 runtime->trigger_master = substream;
1315 return 0;
1316 }
1317
1318 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1319 {
1320 struct snd_pcm_runtime *runtime = substream->runtime;
1321 if (runtime->trigger_master != substream)
1322 return 0;
1323 /* DMA not running previously? */
1324 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1325 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1326 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1327 return 0;
1328 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1329 }
1330
1331 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1332 {
1333 if (substream->runtime->trigger_master == substream &&
1334 snd_pcm_running(substream))
1335 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1336 }
1337
1338 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1339 {
1340 struct snd_pcm_runtime *runtime = substream->runtime;
1341 snd_pcm_trigger_tstamp(substream);
1342 runtime->status->state = runtime->status->suspended_state;
1343 if (substream->timer)
1344 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1345 &runtime->trigger_tstamp);
1346 }
1347
1348 static struct action_ops snd_pcm_action_resume = {
1349 .pre_action = snd_pcm_pre_resume,
1350 .do_action = snd_pcm_do_resume,
1351 .undo_action = snd_pcm_undo_resume,
1352 .post_action = snd_pcm_post_resume
1353 };
1354
1355 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1356 {
1357 struct snd_card *card = substream->pcm->card;
1358 int res;
1359
1360 snd_power_lock(card);
1361 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1362 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1363 snd_power_unlock(card);
1364 return res;
1365 }
1366
1367 #else
1368
1369 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1370 {
1371 return -ENOSYS;
1372 }
1373
1374 #endif /* CONFIG_PM */
1375
1376 /*
1377 * xrun ioctl
1378 *
1379 * Change the RUNNING stream(s) to XRUN state.
1380 */
1381 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1382 {
1383 struct snd_card *card = substream->pcm->card;
1384 struct snd_pcm_runtime *runtime = substream->runtime;
1385 int result;
1386
1387 snd_power_lock(card);
1388 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1389 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1390 if (result < 0)
1391 goto _unlock;
1392 }
1393
1394 snd_pcm_stream_lock_irq(substream);
1395 switch (runtime->status->state) {
1396 case SNDRV_PCM_STATE_XRUN:
1397 result = 0; /* already there */
1398 break;
1399 case SNDRV_PCM_STATE_RUNNING:
1400 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1401 break;
1402 default:
1403 result = -EBADFD;
1404 }
1405 snd_pcm_stream_unlock_irq(substream);
1406 _unlock:
1407 snd_power_unlock(card);
1408 return result;
1409 }
1410
1411 /*
1412 * reset ioctl
1413 */
1414 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1415 {
1416 struct snd_pcm_runtime *runtime = substream->runtime;
1417 switch (runtime->status->state) {
1418 case SNDRV_PCM_STATE_RUNNING:
1419 case SNDRV_PCM_STATE_PREPARED:
1420 case SNDRV_PCM_STATE_PAUSED:
1421 case SNDRV_PCM_STATE_SUSPENDED:
1422 return 0;
1423 default:
1424 return -EBADFD;
1425 }
1426 }
1427
1428 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1429 {
1430 struct snd_pcm_runtime *runtime = substream->runtime;
1431 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1432 if (err < 0)
1433 return err;
1434 runtime->hw_ptr_base = 0;
1435 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1436 runtime->status->hw_ptr % runtime->period_size;
1437 runtime->silence_start = runtime->status->hw_ptr;
1438 runtime->silence_filled = 0;
1439 return 0;
1440 }
1441
1442 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1443 {
1444 struct snd_pcm_runtime *runtime = substream->runtime;
1445 runtime->control->appl_ptr = runtime->status->hw_ptr;
1446 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1447 runtime->silence_size > 0)
1448 snd_pcm_playback_silence(substream, ULONG_MAX);
1449 }
1450
1451 static struct action_ops snd_pcm_action_reset = {
1452 .pre_action = snd_pcm_pre_reset,
1453 .do_action = snd_pcm_do_reset,
1454 .post_action = snd_pcm_post_reset
1455 };
1456
1457 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1458 {
1459 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1460 }
1461
1462 /*
1463 * prepare ioctl
1464 */
1465 /* we use the second argument for updating f_flags */
1466 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1467 int f_flags)
1468 {
1469 struct snd_pcm_runtime *runtime = substream->runtime;
1470 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1471 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1472 return -EBADFD;
1473 if (snd_pcm_running(substream))
1474 return -EBUSY;
1475 substream->f_flags = f_flags;
1476 return 0;
1477 }
1478
1479 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1480 {
1481 int err;
1482 err = substream->ops->prepare(substream);
1483 if (err < 0)
1484 return err;
1485 return snd_pcm_do_reset(substream, 0);
1486 }
1487
1488 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1489 {
1490 struct snd_pcm_runtime *runtime = substream->runtime;
1491 runtime->control->appl_ptr = runtime->status->hw_ptr;
1492 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1493 }
1494
1495 static struct action_ops snd_pcm_action_prepare = {
1496 .pre_action = snd_pcm_pre_prepare,
1497 .do_action = snd_pcm_do_prepare,
1498 .post_action = snd_pcm_post_prepare
1499 };
1500
1501 /**
1502 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1503 * @substream: the PCM substream instance
1504 * @file: file to refer f_flags
1505 *
1506 * Return: Zero if successful, or a negative error code.
1507 */
1508 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1509 struct file *file)
1510 {
1511 int res;
1512 struct snd_card *card = substream->pcm->card;
1513 int f_flags;
1514
1515 if (file)
1516 f_flags = file->f_flags;
1517 else
1518 f_flags = substream->f_flags;
1519
1520 snd_power_lock(card);
1521 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1522 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1523 substream, f_flags);
1524 snd_power_unlock(card);
1525 return res;
1526 }
1527
1528 /*
1529 * drain ioctl
1530 */
1531
1532 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1533 {
1534 struct snd_pcm_runtime *runtime = substream->runtime;
1535 switch (runtime->status->state) {
1536 case SNDRV_PCM_STATE_OPEN:
1537 case SNDRV_PCM_STATE_DISCONNECTED:
1538 case SNDRV_PCM_STATE_SUSPENDED:
1539 return -EBADFD;
1540 }
1541 runtime->trigger_master = substream;
1542 return 0;
1543 }
1544
1545 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1546 {
1547 struct snd_pcm_runtime *runtime = substream->runtime;
1548 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1549 switch (runtime->status->state) {
1550 case SNDRV_PCM_STATE_PREPARED:
1551 /* start playback stream if possible */
1552 if (! snd_pcm_playback_empty(substream)) {
1553 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1554 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1555 } else {
1556 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1557 }
1558 break;
1559 case SNDRV_PCM_STATE_RUNNING:
1560 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1561 break;
1562 case SNDRV_PCM_STATE_XRUN:
1563 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1564 break;
1565 default:
1566 break;
1567 }
1568 } else {
1569 /* stop running stream */
1570 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1571 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1572 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1573 snd_pcm_do_stop(substream, new_state);
1574 snd_pcm_post_stop(substream, new_state);
1575 }
1576 }
1577
1578 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1579 runtime->trigger_master == substream &&
1580 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1581 return substream->ops->trigger(substream,
1582 SNDRV_PCM_TRIGGER_DRAIN);
1583
1584 return 0;
1585 }
1586
1587 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1588 {
1589 }
1590
1591 static struct action_ops snd_pcm_action_drain_init = {
1592 .pre_action = snd_pcm_pre_drain_init,
1593 .do_action = snd_pcm_do_drain_init,
1594 .post_action = snd_pcm_post_drain_init
1595 };
1596
1597 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1598
1599 /*
1600 * Drain the stream(s).
1601 * When the substream is linked, sync until the draining of all playback streams
1602 * is finished.
1603 * After this call, all streams are supposed to be either SETUP or DRAINING
1604 * (capture only) state.
1605 */
1606 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1607 struct file *file)
1608 {
1609 struct snd_card *card;
1610 struct snd_pcm_runtime *runtime;
1611 struct snd_pcm_substream *s;
1612 wait_queue_t wait;
1613 int result = 0;
1614 int nonblock = 0;
1615
1616 card = substream->pcm->card;
1617 runtime = substream->runtime;
1618
1619 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1620 return -EBADFD;
1621
1622 snd_power_lock(card);
1623 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1624 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1625 if (result < 0) {
1626 snd_power_unlock(card);
1627 return result;
1628 }
1629 }
1630
1631 if (file) {
1632 if (file->f_flags & O_NONBLOCK)
1633 nonblock = 1;
1634 } else if (substream->f_flags & O_NONBLOCK)
1635 nonblock = 1;
1636
1637 down_read(&snd_pcm_link_rwsem);
1638 snd_pcm_stream_lock_irq(substream);
1639 /* resume pause */
1640 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1641 snd_pcm_pause(substream, 0);
1642
1643 /* pre-start/stop - all running streams are changed to DRAINING state */
1644 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1645 if (result < 0)
1646 goto unlock;
1647 /* in non-blocking, we don't wait in ioctl but let caller poll */
1648 if (nonblock) {
1649 result = -EAGAIN;
1650 goto unlock;
1651 }
1652
1653 for (;;) {
1654 long tout;
1655 struct snd_pcm_runtime *to_check;
1656 if (signal_pending(current)) {
1657 result = -ERESTARTSYS;
1658 break;
1659 }
1660 /* find a substream to drain */
1661 to_check = NULL;
1662 snd_pcm_group_for_each_entry(s, substream) {
1663 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1664 continue;
1665 runtime = s->runtime;
1666 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1667 to_check = runtime;
1668 break;
1669 }
1670 }
1671 if (!to_check)
1672 break; /* all drained */
1673 init_waitqueue_entry(&wait, current);
1674 add_wait_queue(&to_check->sleep, &wait);
1675 snd_pcm_stream_unlock_irq(substream);
1676 up_read(&snd_pcm_link_rwsem);
1677 snd_power_unlock(card);
1678 if (runtime->no_period_wakeup)
1679 tout = MAX_SCHEDULE_TIMEOUT;
1680 else {
1681 tout = 10;
1682 if (runtime->rate) {
1683 long t = runtime->period_size * 2 / runtime->rate;
1684 tout = max(t, tout);
1685 }
1686 tout = msecs_to_jiffies(tout * 1000);
1687 }
1688 tout = schedule_timeout_interruptible(tout);
1689 snd_power_lock(card);
1690 down_read(&snd_pcm_link_rwsem);
1691 snd_pcm_stream_lock_irq(substream);
1692 remove_wait_queue(&to_check->sleep, &wait);
1693 if (card->shutdown) {
1694 result = -ENODEV;
1695 break;
1696 }
1697 if (tout == 0) {
1698 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1699 result = -ESTRPIPE;
1700 else {
1701 dev_dbg(substream->pcm->card->dev,
1702 "playback drain error (DMA or IRQ trouble?)\n");
1703 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1704 result = -EIO;
1705 }
1706 break;
1707 }
1708 }
1709
1710 unlock:
1711 snd_pcm_stream_unlock_irq(substream);
1712 up_read(&snd_pcm_link_rwsem);
1713 snd_power_unlock(card);
1714
1715 return result;
1716 }
1717
1718 /*
1719 * drop ioctl
1720 *
1721 * Immediately put all linked substreams into SETUP state.
1722 */
1723 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1724 {
1725 struct snd_pcm_runtime *runtime;
1726 int result = 0;
1727
1728 if (PCM_RUNTIME_CHECK(substream))
1729 return -ENXIO;
1730 runtime = substream->runtime;
1731
1732 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1733 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1734 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1735 return -EBADFD;
1736
1737 snd_pcm_stream_lock_irq(substream);
1738 /* resume pause */
1739 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1740 snd_pcm_pause(substream, 0);
1741
1742 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1743 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1744 snd_pcm_stream_unlock_irq(substream);
1745
1746 return result;
1747 }
1748
1749
1750 static bool is_pcm_file(struct file *file)
1751 {
1752 struct inode *inode = file_inode(file);
1753 unsigned int minor;
1754
1755 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1756 return false;
1757 minor = iminor(inode);
1758 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1759 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1760 }
1761
1762 /*
1763 * PCM link handling
1764 */
1765 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1766 {
1767 int res = 0;
1768 struct snd_pcm_file *pcm_file;
1769 struct snd_pcm_substream *substream1;
1770 struct snd_pcm_group *group;
1771 struct fd f = fdget(fd);
1772
1773 if (!f.file)
1774 return -EBADFD;
1775 if (!is_pcm_file(f.file)) {
1776 res = -EBADFD;
1777 goto _badf;
1778 }
1779 pcm_file = f.file->private_data;
1780 substream1 = pcm_file->substream;
1781 group = kmalloc(sizeof(*group), GFP_KERNEL);
1782 if (!group) {
1783 res = -ENOMEM;
1784 goto _nolock;
1785 }
1786 down_write(&snd_pcm_link_rwsem);
1787 write_lock_irq(&snd_pcm_link_rwlock);
1788 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1789 substream->runtime->status->state != substream1->runtime->status->state ||
1790 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1791 res = -EBADFD;
1792 goto _end;
1793 }
1794 if (snd_pcm_stream_linked(substream1)) {
1795 res = -EALREADY;
1796 goto _end;
1797 }
1798 if (!snd_pcm_stream_linked(substream)) {
1799 substream->group = group;
1800 group = NULL;
1801 spin_lock_init(&substream->group->lock);
1802 mutex_init(&substream->group->mutex);
1803 INIT_LIST_HEAD(&substream->group->substreams);
1804 list_add_tail(&substream->link_list, &substream->group->substreams);
1805 substream->group->count = 1;
1806 }
1807 list_add_tail(&substream1->link_list, &substream->group->substreams);
1808 substream->group->count++;
1809 substream1->group = substream->group;
1810 _end:
1811 write_unlock_irq(&snd_pcm_link_rwlock);
1812 up_write(&snd_pcm_link_rwsem);
1813 _nolock:
1814 snd_card_unref(substream1->pcm->card);
1815 kfree(group);
1816 _badf:
1817 fdput(f);
1818 return res;
1819 }
1820
1821 static void relink_to_local(struct snd_pcm_substream *substream)
1822 {
1823 substream->group = &substream->self_group;
1824 INIT_LIST_HEAD(&substream->self_group.substreams);
1825 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1826 }
1827
1828 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1829 {
1830 struct snd_pcm_substream *s;
1831 int res = 0;
1832
1833 down_write(&snd_pcm_link_rwsem);
1834 write_lock_irq(&snd_pcm_link_rwlock);
1835 if (!snd_pcm_stream_linked(substream)) {
1836 res = -EALREADY;
1837 goto _end;
1838 }
1839 list_del(&substream->link_list);
1840 substream->group->count--;
1841 if (substream->group->count == 1) { /* detach the last stream, too */
1842 snd_pcm_group_for_each_entry(s, substream) {
1843 relink_to_local(s);
1844 break;
1845 }
1846 kfree(substream->group);
1847 }
1848 relink_to_local(substream);
1849 _end:
1850 write_unlock_irq(&snd_pcm_link_rwlock);
1851 up_write(&snd_pcm_link_rwsem);
1852 return res;
1853 }
1854
1855 /*
1856 * hw configurator
1857 */
1858 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1859 struct snd_pcm_hw_rule *rule)
1860 {
1861 struct snd_interval t;
1862 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1863 hw_param_interval_c(params, rule->deps[1]), &t);
1864 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1865 }
1866
1867 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1868 struct snd_pcm_hw_rule *rule)
1869 {
1870 struct snd_interval t;
1871 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1872 hw_param_interval_c(params, rule->deps[1]), &t);
1873 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1874 }
1875
1876 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1877 struct snd_pcm_hw_rule *rule)
1878 {
1879 struct snd_interval t;
1880 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1881 hw_param_interval_c(params, rule->deps[1]),
1882 (unsigned long) rule->private, &t);
1883 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1884 }
1885
1886 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1887 struct snd_pcm_hw_rule *rule)
1888 {
1889 struct snd_interval t;
1890 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1891 (unsigned long) rule->private,
1892 hw_param_interval_c(params, rule->deps[1]), &t);
1893 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1894 }
1895
1896 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1897 struct snd_pcm_hw_rule *rule)
1898 {
1899 unsigned int k;
1900 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1901 struct snd_mask m;
1902 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1903 snd_mask_any(&m);
1904 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1905 int bits;
1906 if (! snd_mask_test(mask, k))
1907 continue;
1908 bits = snd_pcm_format_physical_width(k);
1909 if (bits <= 0)
1910 continue; /* ignore invalid formats */
1911 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1912 snd_mask_reset(&m, k);
1913 }
1914 return snd_mask_refine(mask, &m);
1915 }
1916
1917 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1918 struct snd_pcm_hw_rule *rule)
1919 {
1920 struct snd_interval t;
1921 unsigned int k;
1922 t.min = UINT_MAX;
1923 t.max = 0;
1924 t.openmin = 0;
1925 t.openmax = 0;
1926 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1927 int bits;
1928 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1929 continue;
1930 bits = snd_pcm_format_physical_width(k);
1931 if (bits <= 0)
1932 continue; /* ignore invalid formats */
1933 if (t.min > (unsigned)bits)
1934 t.min = bits;
1935 if (t.max < (unsigned)bits)
1936 t.max = bits;
1937 }
1938 t.integer = 1;
1939 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1940 }
1941
1942 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1943 #error "Change this table"
1944 #endif
1945
1946 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1947 48000, 64000, 88200, 96000, 176400, 192000 };
1948
1949 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1950 .count = ARRAY_SIZE(rates),
1951 .list = rates,
1952 };
1953
1954 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1955 struct snd_pcm_hw_rule *rule)
1956 {
1957 struct snd_pcm_hardware *hw = rule->private;
1958 return snd_interval_list(hw_param_interval(params, rule->var),
1959 snd_pcm_known_rates.count,
1960 snd_pcm_known_rates.list, hw->rates);
1961 }
1962
1963 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1964 struct snd_pcm_hw_rule *rule)
1965 {
1966 struct snd_interval t;
1967 struct snd_pcm_substream *substream = rule->private;
1968 t.min = 0;
1969 t.max = substream->buffer_bytes_max;
1970 t.openmin = 0;
1971 t.openmax = 0;
1972 t.integer = 1;
1973 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1974 }
1975
1976 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1977 {
1978 struct snd_pcm_runtime *runtime = substream->runtime;
1979 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1980 int k, err;
1981
1982 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1983 snd_mask_any(constrs_mask(constrs, k));
1984 }
1985
1986 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1987 snd_interval_any(constrs_interval(constrs, k));
1988 }
1989
1990 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1991 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1992 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1993 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1994 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1995
1996 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1997 snd_pcm_hw_rule_format, NULL,
1998 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1999 if (err < 0)
2000 return err;
2001 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2002 snd_pcm_hw_rule_sample_bits, NULL,
2003 SNDRV_PCM_HW_PARAM_FORMAT,
2004 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2005 if (err < 0)
2006 return err;
2007 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2008 snd_pcm_hw_rule_div, NULL,
2009 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2010 if (err < 0)
2011 return err;
2012 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2013 snd_pcm_hw_rule_mul, NULL,
2014 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2015 if (err < 0)
2016 return err;
2017 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2018 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2019 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2020 if (err < 0)
2021 return err;
2022 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2023 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2024 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2025 if (err < 0)
2026 return err;
2027 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2028 snd_pcm_hw_rule_div, NULL,
2029 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2030 if (err < 0)
2031 return err;
2032 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2033 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2034 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2035 if (err < 0)
2036 return err;
2037 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2038 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2039 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2040 if (err < 0)
2041 return err;
2042 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2043 snd_pcm_hw_rule_div, NULL,
2044 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2045 if (err < 0)
2046 return err;
2047 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2048 snd_pcm_hw_rule_div, NULL,
2049 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2050 if (err < 0)
2051 return err;
2052 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2053 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2054 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2055 if (err < 0)
2056 return err;
2057 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2058 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2059 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2060 if (err < 0)
2061 return err;
2062 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2063 snd_pcm_hw_rule_mul, NULL,
2064 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2065 if (err < 0)
2066 return err;
2067 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2068 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2069 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2070 if (err < 0)
2071 return err;
2072 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2073 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2074 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2075 if (err < 0)
2076 return err;
2077 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2078 snd_pcm_hw_rule_muldivk, (void*) 8,
2079 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2080 if (err < 0)
2081 return err;
2082 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2083 snd_pcm_hw_rule_muldivk, (void*) 8,
2084 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2085 if (err < 0)
2086 return err;
2087 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2088 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2089 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2090 if (err < 0)
2091 return err;
2092 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2093 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2094 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2095 if (err < 0)
2096 return err;
2097 return 0;
2098 }
2099
2100 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2101 {
2102 struct snd_pcm_runtime *runtime = substream->runtime;
2103 struct snd_pcm_hardware *hw = &runtime->hw;
2104 int err;
2105 unsigned int mask = 0;
2106
2107 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2108 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2109 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2110 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
2111 if (hw_support_mmap(substream)) {
2112 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2113 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2114 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2115 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2116 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2117 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2118 }
2119 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2120 if (err < 0)
2121 return err;
2122
2123 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2124 if (err < 0)
2125 return err;
2126
2127 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
2128 if (err < 0)
2129 return err;
2130
2131 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2132 hw->channels_min, hw->channels_max);
2133 if (err < 0)
2134 return err;
2135
2136 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2137 hw->rate_min, hw->rate_max);
2138 if (err < 0)
2139 return err;
2140
2141 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2142 hw->period_bytes_min, hw->period_bytes_max);
2143 if (err < 0)
2144 return err;
2145
2146 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2147 hw->periods_min, hw->periods_max);
2148 if (err < 0)
2149 return err;
2150
2151 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2152 hw->period_bytes_min, hw->buffer_bytes_max);
2153 if (err < 0)
2154 return err;
2155
2156 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2157 snd_pcm_hw_rule_buffer_bytes_max, substream,
2158 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2159 if (err < 0)
2160 return err;
2161
2162 /* FIXME: remove */
2163 if (runtime->dma_bytes) {
2164 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2165 if (err < 0)
2166 return err;
2167 }
2168
2169 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2170 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2171 snd_pcm_hw_rule_rate, hw,
2172 SNDRV_PCM_HW_PARAM_RATE, -1);
2173 if (err < 0)
2174 return err;
2175 }
2176
2177 /* FIXME: this belong to lowlevel */
2178 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2179
2180 return 0;
2181 }
2182
2183 static void pcm_release_private(struct snd_pcm_substream *substream)
2184 {
2185 snd_pcm_unlink(substream);
2186 }
2187
2188 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2189 {
2190 substream->ref_count--;
2191 if (substream->ref_count > 0)
2192 return;
2193
2194 snd_pcm_drop(substream);
2195 if (substream->hw_opened) {
2196 if (substream->ops->hw_free != NULL)
2197 substream->ops->hw_free(substream);
2198 substream->ops->close(substream);
2199 substream->hw_opened = 0;
2200 }
2201 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2202 pm_qos_remove_request(&substream->latency_pm_qos_req);
2203 if (substream->pcm_release) {
2204 substream->pcm_release(substream);
2205 substream->pcm_release = NULL;
2206 }
2207 snd_pcm_detach_substream(substream);
2208 }
2209
2210 EXPORT_SYMBOL(snd_pcm_release_substream);
2211
2212 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2213 struct file *file,
2214 struct snd_pcm_substream **rsubstream)
2215 {
2216 struct snd_pcm_substream *substream;
2217 int err;
2218
2219 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2220 if (err < 0)
2221 return err;
2222 if (substream->ref_count > 1) {
2223 *rsubstream = substream;
2224 return 0;
2225 }
2226
2227 err = snd_pcm_hw_constraints_init(substream);
2228 if (err < 0) {
2229 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2230 goto error;
2231 }
2232
2233 if ((err = substream->ops->open(substream)) < 0)
2234 goto error;
2235
2236 substream->hw_opened = 1;
2237
2238 err = snd_pcm_hw_constraints_complete(substream);
2239 if (err < 0) {
2240 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2241 goto error;
2242 }
2243
2244 *rsubstream = substream;
2245 return 0;
2246
2247 error:
2248 snd_pcm_release_substream(substream);
2249 return err;
2250 }
2251
2252 EXPORT_SYMBOL(snd_pcm_open_substream);
2253
2254 static int snd_pcm_open_file(struct file *file,
2255 struct snd_pcm *pcm,
2256 int stream)
2257 {
2258 struct snd_pcm_file *pcm_file;
2259 struct snd_pcm_substream *substream;
2260 int err;
2261
2262 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2263 if (err < 0)
2264 return err;
2265
2266 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2267 if (pcm_file == NULL) {
2268 snd_pcm_release_substream(substream);
2269 return -ENOMEM;
2270 }
2271 pcm_file->substream = substream;
2272 if (substream->ref_count == 1) {
2273 substream->file = pcm_file;
2274 substream->pcm_release = pcm_release_private;
2275 }
2276 file->private_data = pcm_file;
2277
2278 return 0;
2279 }
2280
2281 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2282 {
2283 struct snd_pcm *pcm;
2284 int err = nonseekable_open(inode, file);
2285 if (err < 0)
2286 return err;
2287 pcm = snd_lookup_minor_data(iminor(inode),
2288 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2289 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2290 if (pcm)
2291 snd_card_unref(pcm->card);
2292 return err;
2293 }
2294
2295 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2296 {
2297 struct snd_pcm *pcm;
2298 int err = nonseekable_open(inode, file);
2299 if (err < 0)
2300 return err;
2301 pcm = snd_lookup_minor_data(iminor(inode),
2302 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2303 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2304 if (pcm)
2305 snd_card_unref(pcm->card);
2306 return err;
2307 }
2308
2309 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2310 {
2311 int err;
2312 wait_queue_t wait;
2313
2314 if (pcm == NULL) {
2315 err = -ENODEV;
2316 goto __error1;
2317 }
2318 err = snd_card_file_add(pcm->card, file);
2319 if (err < 0)
2320 goto __error1;
2321 if (!try_module_get(pcm->card->module)) {
2322 err = -EFAULT;
2323 goto __error2;
2324 }
2325 init_waitqueue_entry(&wait, current);
2326 add_wait_queue(&pcm->open_wait, &wait);
2327 mutex_lock(&pcm->open_mutex);
2328 while (1) {
2329 err = snd_pcm_open_file(file, pcm, stream);
2330 if (err >= 0)
2331 break;
2332 if (err == -EAGAIN) {
2333 if (file->f_flags & O_NONBLOCK) {
2334 err = -EBUSY;
2335 break;
2336 }
2337 } else
2338 break;
2339 set_current_state(TASK_INTERRUPTIBLE);
2340 mutex_unlock(&pcm->open_mutex);
2341 schedule();
2342 mutex_lock(&pcm->open_mutex);
2343 if (pcm->card->shutdown) {
2344 err = -ENODEV;
2345 break;
2346 }
2347 if (signal_pending(current)) {
2348 err = -ERESTARTSYS;
2349 break;
2350 }
2351 }
2352 remove_wait_queue(&pcm->open_wait, &wait);
2353 mutex_unlock(&pcm->open_mutex);
2354 if (err < 0)
2355 goto __error;
2356 return err;
2357
2358 __error:
2359 module_put(pcm->card->module);
2360 __error2:
2361 snd_card_file_remove(pcm->card, file);
2362 __error1:
2363 return err;
2364 }
2365
2366 static int snd_pcm_release(struct inode *inode, struct file *file)
2367 {
2368 struct snd_pcm *pcm;
2369 struct snd_pcm_substream *substream;
2370 struct snd_pcm_file *pcm_file;
2371
2372 pcm_file = file->private_data;
2373 substream = pcm_file->substream;
2374 if (snd_BUG_ON(!substream))
2375 return -ENXIO;
2376 pcm = substream->pcm;
2377 mutex_lock(&pcm->open_mutex);
2378 snd_pcm_release_substream(substream);
2379 kfree(pcm_file);
2380 mutex_unlock(&pcm->open_mutex);
2381 wake_up(&pcm->open_wait);
2382 module_put(pcm->card->module);
2383 snd_card_file_remove(pcm->card, file);
2384 return 0;
2385 }
2386
2387 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2388 snd_pcm_uframes_t frames)
2389 {
2390 struct snd_pcm_runtime *runtime = substream->runtime;
2391 snd_pcm_sframes_t appl_ptr;
2392 snd_pcm_sframes_t ret;
2393 snd_pcm_sframes_t hw_avail;
2394
2395 if (frames == 0)
2396 return 0;
2397
2398 snd_pcm_stream_lock_irq(substream);
2399 switch (runtime->status->state) {
2400 case SNDRV_PCM_STATE_PREPARED:
2401 break;
2402 case SNDRV_PCM_STATE_DRAINING:
2403 case SNDRV_PCM_STATE_RUNNING:
2404 if (snd_pcm_update_hw_ptr(substream) >= 0)
2405 break;
2406 /* Fall through */
2407 case SNDRV_PCM_STATE_XRUN:
2408 ret = -EPIPE;
2409 goto __end;
2410 case SNDRV_PCM_STATE_SUSPENDED:
2411 ret = -ESTRPIPE;
2412 goto __end;
2413 default:
2414 ret = -EBADFD;
2415 goto __end;
2416 }
2417
2418 hw_avail = snd_pcm_playback_hw_avail(runtime);
2419 if (hw_avail <= 0) {
2420 ret = 0;
2421 goto __end;
2422 }
2423 if (frames > (snd_pcm_uframes_t)hw_avail)
2424 frames = hw_avail;
2425 appl_ptr = runtime->control->appl_ptr - frames;
2426 if (appl_ptr < 0)
2427 appl_ptr += runtime->boundary;
2428 runtime->control->appl_ptr = appl_ptr;
2429 ret = frames;
2430 __end:
2431 snd_pcm_stream_unlock_irq(substream);
2432 return ret;
2433 }
2434
2435 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2436 snd_pcm_uframes_t frames)
2437 {
2438 struct snd_pcm_runtime *runtime = substream->runtime;
2439 snd_pcm_sframes_t appl_ptr;
2440 snd_pcm_sframes_t ret;
2441 snd_pcm_sframes_t hw_avail;
2442
2443 if (frames == 0)
2444 return 0;
2445
2446 snd_pcm_stream_lock_irq(substream);
2447 switch (runtime->status->state) {
2448 case SNDRV_PCM_STATE_PREPARED:
2449 case SNDRV_PCM_STATE_DRAINING:
2450 break;
2451 case SNDRV_PCM_STATE_RUNNING:
2452 if (snd_pcm_update_hw_ptr(substream) >= 0)
2453 break;
2454 /* Fall through */
2455 case SNDRV_PCM_STATE_XRUN:
2456 ret = -EPIPE;
2457 goto __end;
2458 case SNDRV_PCM_STATE_SUSPENDED:
2459 ret = -ESTRPIPE;
2460 goto __end;
2461 default:
2462 ret = -EBADFD;
2463 goto __end;
2464 }
2465
2466 hw_avail = snd_pcm_capture_hw_avail(runtime);
2467 if (hw_avail <= 0) {
2468 ret = 0;
2469 goto __end;
2470 }
2471 if (frames > (snd_pcm_uframes_t)hw_avail)
2472 frames = hw_avail;
2473 appl_ptr = runtime->control->appl_ptr - frames;
2474 if (appl_ptr < 0)
2475 appl_ptr += runtime->boundary;
2476 runtime->control->appl_ptr = appl_ptr;
2477 ret = frames;
2478 __end:
2479 snd_pcm_stream_unlock_irq(substream);
2480 return ret;
2481 }
2482
2483 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2484 snd_pcm_uframes_t frames)
2485 {
2486 struct snd_pcm_runtime *runtime = substream->runtime;
2487 snd_pcm_sframes_t appl_ptr;
2488 snd_pcm_sframes_t ret;
2489 snd_pcm_sframes_t avail;
2490
2491 if (frames == 0)
2492 return 0;
2493
2494 snd_pcm_stream_lock_irq(substream);
2495 switch (runtime->status->state) {
2496 case SNDRV_PCM_STATE_PREPARED:
2497 case SNDRV_PCM_STATE_PAUSED:
2498 break;
2499 case SNDRV_PCM_STATE_DRAINING:
2500 case SNDRV_PCM_STATE_RUNNING:
2501 if (snd_pcm_update_hw_ptr(substream) >= 0)
2502 break;
2503 /* Fall through */
2504 case SNDRV_PCM_STATE_XRUN:
2505 ret = -EPIPE;
2506 goto __end;
2507 case SNDRV_PCM_STATE_SUSPENDED:
2508 ret = -ESTRPIPE;
2509 goto __end;
2510 default:
2511 ret = -EBADFD;
2512 goto __end;
2513 }
2514
2515 avail = snd_pcm_playback_avail(runtime);
2516 if (avail <= 0) {
2517 ret = 0;
2518 goto __end;
2519 }
2520 if (frames > (snd_pcm_uframes_t)avail)
2521 frames = avail;
2522 appl_ptr = runtime->control->appl_ptr + frames;
2523 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2524 appl_ptr -= runtime->boundary;
2525 runtime->control->appl_ptr = appl_ptr;
2526 ret = frames;
2527 __end:
2528 snd_pcm_stream_unlock_irq(substream);
2529 return ret;
2530 }
2531
2532 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2533 snd_pcm_uframes_t frames)
2534 {
2535 struct snd_pcm_runtime *runtime = substream->runtime;
2536 snd_pcm_sframes_t appl_ptr;
2537 snd_pcm_sframes_t ret;
2538 snd_pcm_sframes_t avail;
2539
2540 if (frames == 0)
2541 return 0;
2542
2543 snd_pcm_stream_lock_irq(substream);
2544 switch (runtime->status->state) {
2545 case SNDRV_PCM_STATE_PREPARED:
2546 case SNDRV_PCM_STATE_DRAINING:
2547 case SNDRV_PCM_STATE_PAUSED:
2548 break;
2549 case SNDRV_PCM_STATE_RUNNING:
2550 if (snd_pcm_update_hw_ptr(substream) >= 0)
2551 break;
2552 /* Fall through */
2553 case SNDRV_PCM_STATE_XRUN:
2554 ret = -EPIPE;
2555 goto __end;
2556 case SNDRV_PCM_STATE_SUSPENDED:
2557 ret = -ESTRPIPE;
2558 goto __end;
2559 default:
2560 ret = -EBADFD;
2561 goto __end;
2562 }
2563
2564 avail = snd_pcm_capture_avail(runtime);
2565 if (avail <= 0) {
2566 ret = 0;
2567 goto __end;
2568 }
2569 if (frames > (snd_pcm_uframes_t)avail)
2570 frames = avail;
2571 appl_ptr = runtime->control->appl_ptr + frames;
2572 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2573 appl_ptr -= runtime->boundary;
2574 runtime->control->appl_ptr = appl_ptr;
2575 ret = frames;
2576 __end:
2577 snd_pcm_stream_unlock_irq(substream);
2578 return ret;
2579 }
2580
2581 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2582 {
2583 struct snd_pcm_runtime *runtime = substream->runtime;
2584 int err;
2585
2586 snd_pcm_stream_lock_irq(substream);
2587 switch (runtime->status->state) {
2588 case SNDRV_PCM_STATE_DRAINING:
2589 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2590 goto __badfd;
2591 /* Fall through */
2592 case SNDRV_PCM_STATE_RUNNING:
2593 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2594 break;
2595 /* Fall through */
2596 case SNDRV_PCM_STATE_PREPARED:
2597 case SNDRV_PCM_STATE_SUSPENDED:
2598 err = 0;
2599 break;
2600 case SNDRV_PCM_STATE_XRUN:
2601 err = -EPIPE;
2602 break;
2603 default:
2604 __badfd:
2605 err = -EBADFD;
2606 break;
2607 }
2608 snd_pcm_stream_unlock_irq(substream);
2609 return err;
2610 }
2611
2612 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2613 snd_pcm_sframes_t __user *res)
2614 {
2615 struct snd_pcm_runtime *runtime = substream->runtime;
2616 int err;
2617 snd_pcm_sframes_t n = 0;
2618
2619 snd_pcm_stream_lock_irq(substream);
2620 switch (runtime->status->state) {
2621 case SNDRV_PCM_STATE_DRAINING:
2622 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2623 goto __badfd;
2624 /* Fall through */
2625 case SNDRV_PCM_STATE_RUNNING:
2626 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2627 break;
2628 /* Fall through */
2629 case SNDRV_PCM_STATE_PREPARED:
2630 case SNDRV_PCM_STATE_SUSPENDED:
2631 err = 0;
2632 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2633 n = snd_pcm_playback_hw_avail(runtime);
2634 else
2635 n = snd_pcm_capture_avail(runtime);
2636 n += runtime->delay;
2637 break;
2638 case SNDRV_PCM_STATE_XRUN:
2639 err = -EPIPE;
2640 break;
2641 default:
2642 __badfd:
2643 err = -EBADFD;
2644 break;
2645 }
2646 snd_pcm_stream_unlock_irq(substream);
2647 if (!err)
2648 if (put_user(n, res))
2649 err = -EFAULT;
2650 return err;
2651 }
2652
2653 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2654 struct snd_pcm_sync_ptr __user *_sync_ptr)
2655 {
2656 struct snd_pcm_runtime *runtime = substream->runtime;
2657 struct snd_pcm_sync_ptr sync_ptr;
2658 volatile struct snd_pcm_mmap_status *status;
2659 volatile struct snd_pcm_mmap_control *control;
2660 int err;
2661
2662 memset(&sync_ptr, 0, sizeof(sync_ptr));
2663 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2664 return -EFAULT;
2665 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2666 return -EFAULT;
2667 status = runtime->status;
2668 control = runtime->control;
2669 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2670 err = snd_pcm_hwsync(substream);
2671 if (err < 0)
2672 return err;
2673 }
2674 snd_pcm_stream_lock_irq(substream);
2675 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2676 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2677 else
2678 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2679 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2680 control->avail_min = sync_ptr.c.control.avail_min;
2681 else
2682 sync_ptr.c.control.avail_min = control->avail_min;
2683 sync_ptr.s.status.state = status->state;
2684 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2685 sync_ptr.s.status.tstamp = status->tstamp;
2686 sync_ptr.s.status.suspended_state = status->suspended_state;
2687 snd_pcm_stream_unlock_irq(substream);
2688 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2689 return -EFAULT;
2690 return 0;
2691 }
2692
2693 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2694 {
2695 struct snd_pcm_runtime *runtime = substream->runtime;
2696 int arg;
2697
2698 if (get_user(arg, _arg))
2699 return -EFAULT;
2700 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2701 return -EINVAL;
2702 runtime->tstamp_type = arg;
2703 return 0;
2704 }
2705
2706 static int snd_pcm_common_ioctl1(struct file *file,
2707 struct snd_pcm_substream *substream,
2708 unsigned int cmd, void __user *arg)
2709 {
2710 switch (cmd) {
2711 case SNDRV_PCM_IOCTL_PVERSION:
2712 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2713 case SNDRV_PCM_IOCTL_INFO:
2714 return snd_pcm_info_user(substream, arg);
2715 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2716 return 0;
2717 case SNDRV_PCM_IOCTL_TTSTAMP:
2718 return snd_pcm_tstamp(substream, arg);
2719 case SNDRV_PCM_IOCTL_HW_REFINE:
2720 return snd_pcm_hw_refine_user(substream, arg);
2721 case SNDRV_PCM_IOCTL_HW_PARAMS:
2722 return snd_pcm_hw_params_user(substream, arg);
2723 case SNDRV_PCM_IOCTL_HW_FREE:
2724 return snd_pcm_hw_free(substream);
2725 case SNDRV_PCM_IOCTL_SW_PARAMS:
2726 return snd_pcm_sw_params_user(substream, arg);
2727 case SNDRV_PCM_IOCTL_STATUS:
2728 return snd_pcm_status_user(substream, arg);
2729 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2730 return snd_pcm_channel_info_user(substream, arg);
2731 case SNDRV_PCM_IOCTL_PREPARE:
2732 return snd_pcm_prepare(substream, file);
2733 case SNDRV_PCM_IOCTL_RESET:
2734 return snd_pcm_reset(substream);
2735 case SNDRV_PCM_IOCTL_START:
2736 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2737 case SNDRV_PCM_IOCTL_LINK:
2738 return snd_pcm_link(substream, (int)(unsigned long) arg);
2739 case SNDRV_PCM_IOCTL_UNLINK:
2740 return snd_pcm_unlink(substream);
2741 case SNDRV_PCM_IOCTL_RESUME:
2742 return snd_pcm_resume(substream);
2743 case SNDRV_PCM_IOCTL_XRUN:
2744 return snd_pcm_xrun(substream);
2745 case SNDRV_PCM_IOCTL_HWSYNC:
2746 return snd_pcm_hwsync(substream);
2747 case SNDRV_PCM_IOCTL_DELAY:
2748 return snd_pcm_delay(substream, arg);
2749 case SNDRV_PCM_IOCTL_SYNC_PTR:
2750 return snd_pcm_sync_ptr(substream, arg);
2751 #ifdef CONFIG_SND_SUPPORT_OLD_API
2752 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2753 return snd_pcm_hw_refine_old_user(substream, arg);
2754 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2755 return snd_pcm_hw_params_old_user(substream, arg);
2756 #endif
2757 case SNDRV_PCM_IOCTL_DRAIN:
2758 return snd_pcm_drain(substream, file);
2759 case SNDRV_PCM_IOCTL_DROP:
2760 return snd_pcm_drop(substream);
2761 case SNDRV_PCM_IOCTL_PAUSE:
2762 {
2763 int res;
2764 snd_pcm_stream_lock_irq(substream);
2765 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2766 snd_pcm_stream_unlock_irq(substream);
2767 return res;
2768 }
2769 }
2770 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2771 return -ENOTTY;
2772 }
2773
2774 static int snd_pcm_playback_ioctl1(struct file *file,
2775 struct snd_pcm_substream *substream,
2776 unsigned int cmd, void __user *arg)
2777 {
2778 if (snd_BUG_ON(!substream))
2779 return -ENXIO;
2780 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2781 return -EINVAL;
2782 switch (cmd) {
2783 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2784 {
2785 struct snd_xferi xferi;
2786 struct snd_xferi __user *_xferi = arg;
2787 struct snd_pcm_runtime *runtime = substream->runtime;
2788 snd_pcm_sframes_t result;
2789 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2790 return -EBADFD;
2791 if (put_user(0, &_xferi->result))
2792 return -EFAULT;
2793 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2794 return -EFAULT;
2795 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2796 __put_user(result, &_xferi->result);
2797 return result < 0 ? result : 0;
2798 }
2799 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2800 {
2801 struct snd_xfern xfern;
2802 struct snd_xfern __user *_xfern = arg;
2803 struct snd_pcm_runtime *runtime = substream->runtime;
2804 void __user **bufs;
2805 snd_pcm_sframes_t result;
2806 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2807 return -EBADFD;
2808 if (runtime->channels > 128)
2809 return -EINVAL;
2810 if (put_user(0, &_xfern->result))
2811 return -EFAULT;
2812 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2813 return -EFAULT;
2814
2815 bufs = memdup_user(xfern.bufs,
2816 sizeof(void *) * runtime->channels);
2817 if (IS_ERR(bufs))
2818 return PTR_ERR(bufs);
2819 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2820 kfree(bufs);
2821 __put_user(result, &_xfern->result);
2822 return result < 0 ? result : 0;
2823 }
2824 case SNDRV_PCM_IOCTL_REWIND:
2825 {
2826 snd_pcm_uframes_t frames;
2827 snd_pcm_uframes_t __user *_frames = arg;
2828 snd_pcm_sframes_t result;
2829 if (get_user(frames, _frames))
2830 return -EFAULT;
2831 if (put_user(0, _frames))
2832 return -EFAULT;
2833 result = snd_pcm_playback_rewind(substream, frames);
2834 __put_user(result, _frames);
2835 return result < 0 ? result : 0;
2836 }
2837 case SNDRV_PCM_IOCTL_FORWARD:
2838 {
2839 snd_pcm_uframes_t frames;
2840 snd_pcm_uframes_t __user *_frames = arg;
2841 snd_pcm_sframes_t result;
2842 if (get_user(frames, _frames))
2843 return -EFAULT;
2844 if (put_user(0, _frames))
2845 return -EFAULT;
2846 result = snd_pcm_playback_forward(substream, frames);
2847 __put_user(result, _frames);
2848 return result < 0 ? result : 0;
2849 }
2850 }
2851 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2852 }
2853
2854 static int snd_pcm_capture_ioctl1(struct file *file,
2855 struct snd_pcm_substream *substream,
2856 unsigned int cmd, void __user *arg)
2857 {
2858 if (snd_BUG_ON(!substream))
2859 return -ENXIO;
2860 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2861 return -EINVAL;
2862 switch (cmd) {
2863 case SNDRV_PCM_IOCTL_READI_FRAMES:
2864 {
2865 struct snd_xferi xferi;
2866 struct snd_xferi __user *_xferi = arg;
2867 struct snd_pcm_runtime *runtime = substream->runtime;
2868 snd_pcm_sframes_t result;
2869 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2870 return -EBADFD;
2871 if (put_user(0, &_xferi->result))
2872 return -EFAULT;
2873 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2874 return -EFAULT;
2875 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2876 __put_user(result, &_xferi->result);
2877 return result < 0 ? result : 0;
2878 }
2879 case SNDRV_PCM_IOCTL_READN_FRAMES:
2880 {
2881 struct snd_xfern xfern;
2882 struct snd_xfern __user *_xfern = arg;
2883 struct snd_pcm_runtime *runtime = substream->runtime;
2884 void *bufs;
2885 snd_pcm_sframes_t result;
2886 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2887 return -EBADFD;
2888 if (runtime->channels > 128)
2889 return -EINVAL;
2890 if (put_user(0, &_xfern->result))
2891 return -EFAULT;
2892 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2893 return -EFAULT;
2894
2895 bufs = memdup_user(xfern.bufs,
2896 sizeof(void *) * runtime->channels);
2897 if (IS_ERR(bufs))
2898 return PTR_ERR(bufs);
2899 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2900 kfree(bufs);
2901 __put_user(result, &_xfern->result);
2902 return result < 0 ? result : 0;
2903 }
2904 case SNDRV_PCM_IOCTL_REWIND:
2905 {
2906 snd_pcm_uframes_t frames;
2907 snd_pcm_uframes_t __user *_frames = arg;
2908 snd_pcm_sframes_t result;
2909 if (get_user(frames, _frames))
2910 return -EFAULT;
2911 if (put_user(0, _frames))
2912 return -EFAULT;
2913 result = snd_pcm_capture_rewind(substream, frames);
2914 __put_user(result, _frames);
2915 return result < 0 ? result : 0;
2916 }
2917 case SNDRV_PCM_IOCTL_FORWARD:
2918 {
2919 snd_pcm_uframes_t frames;
2920 snd_pcm_uframes_t __user *_frames = arg;
2921 snd_pcm_sframes_t result;
2922 if (get_user(frames, _frames))
2923 return -EFAULT;
2924 if (put_user(0, _frames))
2925 return -EFAULT;
2926 result = snd_pcm_capture_forward(substream, frames);
2927 __put_user(result, _frames);
2928 return result < 0 ? result : 0;
2929 }
2930 }
2931 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2932 }
2933
2934 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2935 unsigned long arg)
2936 {
2937 struct snd_pcm_file *pcm_file;
2938
2939 pcm_file = file->private_data;
2940
2941 if (((cmd >> 8) & 0xff) != 'A')
2942 return -ENOTTY;
2943
2944 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2945 (void __user *)arg);
2946 }
2947
2948 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2949 unsigned long arg)
2950 {
2951 struct snd_pcm_file *pcm_file;
2952
2953 pcm_file = file->private_data;
2954
2955 if (((cmd >> 8) & 0xff) != 'A')
2956 return -ENOTTY;
2957
2958 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2959 (void __user *)arg);
2960 }
2961
2962 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2963 unsigned int cmd, void *arg)
2964 {
2965 mm_segment_t fs;
2966 int result;
2967
2968 fs = snd_enter_user();
2969 switch (substream->stream) {
2970 case SNDRV_PCM_STREAM_PLAYBACK:
2971 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2972 (void __user *)arg);
2973 break;
2974 case SNDRV_PCM_STREAM_CAPTURE:
2975 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2976 (void __user *)arg);
2977 break;
2978 default:
2979 result = -EINVAL;
2980 break;
2981 }
2982 snd_leave_user(fs);
2983 return result;
2984 }
2985
2986 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2987
2988 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2989 loff_t * offset)
2990 {
2991 struct snd_pcm_file *pcm_file;
2992 struct snd_pcm_substream *substream;
2993 struct snd_pcm_runtime *runtime;
2994 snd_pcm_sframes_t result;
2995
2996 pcm_file = file->private_data;
2997 substream = pcm_file->substream;
2998 if (PCM_RUNTIME_CHECK(substream))
2999 return -ENXIO;
3000 runtime = substream->runtime;
3001 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3002 return -EBADFD;
3003 if (!frame_aligned(runtime, count))
3004 return -EINVAL;
3005 count = bytes_to_frames(runtime, count);
3006 result = snd_pcm_lib_read(substream, buf, count);
3007 if (result > 0)
3008 result = frames_to_bytes(runtime, result);
3009 return result;
3010 }
3011
3012 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3013 size_t count, loff_t * offset)
3014 {
3015 struct snd_pcm_file *pcm_file;
3016 struct snd_pcm_substream *substream;
3017 struct snd_pcm_runtime *runtime;
3018 snd_pcm_sframes_t result;
3019
3020 pcm_file = file->private_data;
3021 substream = pcm_file->substream;
3022 if (PCM_RUNTIME_CHECK(substream))
3023 return -ENXIO;
3024 runtime = substream->runtime;
3025 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3026 return -EBADFD;
3027 if (!frame_aligned(runtime, count))
3028 return -EINVAL;
3029 count = bytes_to_frames(runtime, count);
3030 result = snd_pcm_lib_write(substream, buf, count);
3031 if (result > 0)
3032 result = frames_to_bytes(runtime, result);
3033 return result;
3034 }
3035
3036 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
3037 unsigned long nr_segs, loff_t pos)
3038
3039 {
3040 struct snd_pcm_file *pcm_file;
3041 struct snd_pcm_substream *substream;
3042 struct snd_pcm_runtime *runtime;
3043 snd_pcm_sframes_t result;
3044 unsigned long i;
3045 void __user **bufs;
3046 snd_pcm_uframes_t frames;
3047
3048 pcm_file = iocb->ki_filp->private_data;
3049 substream = pcm_file->substream;
3050 if (PCM_RUNTIME_CHECK(substream))
3051 return -ENXIO;
3052 runtime = substream->runtime;
3053 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3054 return -EBADFD;
3055 if (nr_segs > 1024 || nr_segs != runtime->channels)
3056 return -EINVAL;
3057 if (!frame_aligned(runtime, iov->iov_len))
3058 return -EINVAL;
3059 frames = bytes_to_samples(runtime, iov->iov_len);
3060 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3061 if (bufs == NULL)
3062 return -ENOMEM;
3063 for (i = 0; i < nr_segs; ++i)
3064 bufs[i] = iov[i].iov_base;
3065 result = snd_pcm_lib_readv(substream, bufs, frames);
3066 if (result > 0)
3067 result = frames_to_bytes(runtime, result);
3068 kfree(bufs);
3069 return result;
3070 }
3071
3072 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
3073 unsigned long nr_segs, loff_t pos)
3074 {
3075 struct snd_pcm_file *pcm_file;
3076 struct snd_pcm_substream *substream;
3077 struct snd_pcm_runtime *runtime;
3078 snd_pcm_sframes_t result;
3079 unsigned long i;
3080 void __user **bufs;
3081 snd_pcm_uframes_t frames;
3082
3083 pcm_file = iocb->ki_filp->private_data;
3084 substream = pcm_file->substream;
3085 if (PCM_RUNTIME_CHECK(substream))
3086 return -ENXIO;
3087 runtime = substream->runtime;
3088 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3089 return -EBADFD;
3090 if (nr_segs > 128 || nr_segs != runtime->channels ||
3091 !frame_aligned(runtime, iov->iov_len))
3092 return -EINVAL;
3093 frames = bytes_to_samples(runtime, iov->iov_len);
3094 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3095 if (bufs == NULL)
3096 return -ENOMEM;
3097 for (i = 0; i < nr_segs; ++i)
3098 bufs[i] = iov[i].iov_base;
3099 result = snd_pcm_lib_writev(substream, bufs, frames);
3100 if (result > 0)
3101 result = frames_to_bytes(runtime, result);
3102 kfree(bufs);
3103 return result;
3104 }
3105
3106 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3107 {
3108 struct snd_pcm_file *pcm_file;
3109 struct snd_pcm_substream *substream;
3110 struct snd_pcm_runtime *runtime;
3111 unsigned int mask;
3112 snd_pcm_uframes_t avail;
3113
3114 pcm_file = file->private_data;
3115
3116 substream = pcm_file->substream;
3117 if (PCM_RUNTIME_CHECK(substream))
3118 return -ENXIO;
3119 runtime = substream->runtime;
3120
3121 poll_wait(file, &runtime->sleep, wait);
3122
3123 snd_pcm_stream_lock_irq(substream);
3124 avail = snd_pcm_playback_avail(runtime);
3125 switch (runtime->status->state) {
3126 case SNDRV_PCM_STATE_RUNNING:
3127 case SNDRV_PCM_STATE_PREPARED:
3128 case SNDRV_PCM_STATE_PAUSED:
3129 if (avail >= runtime->control->avail_min) {
3130 mask = POLLOUT | POLLWRNORM;
3131 break;
3132 }
3133 /* Fall through */
3134 case SNDRV_PCM_STATE_DRAINING:
3135 mask = 0;
3136 break;
3137 default:
3138 mask = POLLOUT | POLLWRNORM | POLLERR;
3139 break;
3140 }
3141 snd_pcm_stream_unlock_irq(substream);
3142 return mask;
3143 }
3144
3145 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3146 {
3147 struct snd_pcm_file *pcm_file;
3148 struct snd_pcm_substream *substream;
3149 struct snd_pcm_runtime *runtime;
3150 unsigned int mask;
3151 snd_pcm_uframes_t avail;
3152
3153 pcm_file = file->private_data;
3154
3155 substream = pcm_file->substream;
3156 if (PCM_RUNTIME_CHECK(substream))
3157 return -ENXIO;
3158 runtime = substream->runtime;
3159
3160 poll_wait(file, &runtime->sleep, wait);
3161
3162 snd_pcm_stream_lock_irq(substream);
3163 avail = snd_pcm_capture_avail(runtime);
3164 switch (runtime->status->state) {
3165 case SNDRV_PCM_STATE_RUNNING:
3166 case SNDRV_PCM_STATE_PREPARED:
3167 case SNDRV_PCM_STATE_PAUSED:
3168 if (avail >= runtime->control->avail_min) {
3169 mask = POLLIN | POLLRDNORM;
3170 break;
3171 }
3172 mask = 0;
3173 break;
3174 case SNDRV_PCM_STATE_DRAINING:
3175 if (avail > 0) {
3176 mask = POLLIN | POLLRDNORM;
3177 break;
3178 }
3179 /* Fall through */
3180 default:
3181 mask = POLLIN | POLLRDNORM | POLLERR;
3182 break;
3183 }
3184 snd_pcm_stream_unlock_irq(substream);
3185 return mask;
3186 }
3187
3188 /*
3189 * mmap support
3190 */
3191
3192 /*
3193 * Only on coherent architectures, we can mmap the status and the control records
3194 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3195 */
3196 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3197 /*
3198 * mmap status record
3199 */
3200 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3201 struct vm_fault *vmf)
3202 {
3203 struct snd_pcm_substream *substream = area->vm_private_data;
3204 struct snd_pcm_runtime *runtime;
3205
3206 if (substream == NULL)
3207 return VM_FAULT_SIGBUS;
3208 runtime = substream->runtime;
3209 vmf->page = virt_to_page(runtime->status);
3210 get_page(vmf->page);
3211 return 0;
3212 }
3213
3214 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3215 {
3216 .fault = snd_pcm_mmap_status_fault,
3217 };
3218
3219 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3220 struct vm_area_struct *area)
3221 {
3222 long size;
3223 if (!(area->vm_flags & VM_READ))
3224 return -EINVAL;
3225 size = area->vm_end - area->vm_start;
3226 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3227 return -EINVAL;
3228 area->vm_ops = &snd_pcm_vm_ops_status;
3229 area->vm_private_data = substream;
3230 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3231 return 0;
3232 }
3233
3234 /*
3235 * mmap control record
3236 */
3237 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3238 struct vm_fault *vmf)
3239 {
3240 struct snd_pcm_substream *substream = area->vm_private_data;
3241 struct snd_pcm_runtime *runtime;
3242
3243 if (substream == NULL)
3244 return VM_FAULT_SIGBUS;
3245 runtime = substream->runtime;
3246 vmf->page = virt_to_page(runtime->control);
3247 get_page(vmf->page);
3248 return 0;
3249 }
3250
3251 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3252 {
3253 .fault = snd_pcm_mmap_control_fault,
3254 };
3255
3256 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3257 struct vm_area_struct *area)
3258 {
3259 long size;
3260 if (!(area->vm_flags & VM_READ))
3261 return -EINVAL;
3262 size = area->vm_end - area->vm_start;
3263 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3264 return -EINVAL;
3265 area->vm_ops = &snd_pcm_vm_ops_control;
3266 area->vm_private_data = substream;
3267 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3268 return 0;
3269 }
3270 #else /* ! coherent mmap */
3271 /*
3272 * don't support mmap for status and control records.
3273 */
3274 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3275 struct vm_area_struct *area)
3276 {
3277 return -ENXIO;
3278 }
3279 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3280 struct vm_area_struct *area)
3281 {
3282 return -ENXIO;
3283 }
3284 #endif /* coherent mmap */
3285
3286 static inline struct page *
3287 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3288 {
3289 void *vaddr = substream->runtime->dma_area + ofs;
3290 return virt_to_page(vaddr);
3291 }
3292
3293 /*
3294 * fault callback for mmapping a RAM page
3295 */
3296 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3297 struct vm_fault *vmf)
3298 {
3299 struct snd_pcm_substream *substream = area->vm_private_data;
3300 struct snd_pcm_runtime *runtime;
3301 unsigned long offset;
3302 struct page * page;
3303 size_t dma_bytes;
3304
3305 if (substream == NULL)
3306 return VM_FAULT_SIGBUS;
3307 runtime = substream->runtime;
3308 offset = vmf->pgoff << PAGE_SHIFT;
3309 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3310 if (offset > dma_bytes - PAGE_SIZE)
3311 return VM_FAULT_SIGBUS;
3312 if (substream->ops->page)
3313 page = substream->ops->page(substream, offset);
3314 else
3315 page = snd_pcm_default_page_ops(substream, offset);
3316 if (!page)
3317 return VM_FAULT_SIGBUS;
3318 get_page(page);
3319 vmf->page = page;
3320 return 0;
3321 }
3322
3323 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3324 .open = snd_pcm_mmap_data_open,
3325 .close = snd_pcm_mmap_data_close,
3326 };
3327
3328 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3329 .open = snd_pcm_mmap_data_open,
3330 .close = snd_pcm_mmap_data_close,
3331 .fault = snd_pcm_mmap_data_fault,
3332 };
3333
3334 /*
3335 * mmap the DMA buffer on RAM
3336 */
3337
3338 /**
3339 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3340 * @substream: PCM substream
3341 * @area: VMA
3342 *
3343 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3344 * this function is invoked implicitly.
3345 */
3346 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3347 struct vm_area_struct *area)
3348 {
3349 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3350 #ifdef CONFIG_GENERIC_ALLOCATOR
3351 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3352 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3353 return remap_pfn_range(area, area->vm_start,
3354 substream->dma_buffer.addr >> PAGE_SHIFT,
3355 area->vm_end - area->vm_start, area->vm_page_prot);
3356 }
3357 #endif /* CONFIG_GENERIC_ALLOCATOR */
3358 #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
3359 if (!substream->ops->page &&
3360 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3361 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3362 area,
3363 substream->runtime->dma_area,
3364 substream->runtime->dma_addr,
3365 area->vm_end - area->vm_start);
3366 #endif /* CONFIG_X86 */
3367 /* mmap with fault handler */
3368 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3369 return 0;
3370 }
3371 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3372
3373 /*
3374 * mmap the DMA buffer on I/O memory area
3375 */
3376 #if SNDRV_PCM_INFO_MMAP_IOMEM
3377 /**
3378 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3379 * @substream: PCM substream
3380 * @area: VMA
3381 *
3382 * When your hardware uses the iomapped pages as the hardware buffer and
3383 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3384 * is supposed to work only on limited architectures.
3385 */
3386 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3387 struct vm_area_struct *area)
3388 {
3389 struct snd_pcm_runtime *runtime = substream->runtime;;
3390
3391 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3392 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3393 }
3394
3395 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3396 #endif /* SNDRV_PCM_INFO_MMAP */
3397
3398 /*
3399 * mmap DMA buffer
3400 */
3401 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3402 struct vm_area_struct *area)
3403 {
3404 struct snd_pcm_runtime *runtime;
3405 long size;
3406 unsigned long offset;
3407 size_t dma_bytes;
3408 int err;
3409
3410 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3411 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3412 return -EINVAL;
3413 } else {
3414 if (!(area->vm_flags & VM_READ))
3415 return -EINVAL;
3416 }
3417 runtime = substream->runtime;
3418 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3419 return -EBADFD;
3420 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3421 return -ENXIO;
3422 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3423 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3424 return -EINVAL;
3425 size = area->vm_end - area->vm_start;
3426 offset = area->vm_pgoff << PAGE_SHIFT;
3427 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3428 if ((size_t)size > dma_bytes)
3429 return -EINVAL;
3430 if (offset > dma_bytes - size)
3431 return -EINVAL;
3432
3433 area->vm_ops = &snd_pcm_vm_ops_data;
3434 area->vm_private_data = substream;
3435 if (substream->ops->mmap)
3436 err = substream->ops->mmap(substream, area);
3437 else
3438 err = snd_pcm_lib_default_mmap(substream, area);
3439 if (!err)
3440 atomic_inc(&substream->mmap_count);
3441 return err;
3442 }
3443
3444 EXPORT_SYMBOL(snd_pcm_mmap_data);
3445
3446 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3447 {
3448 struct snd_pcm_file * pcm_file;
3449 struct snd_pcm_substream *substream;
3450 unsigned long offset;
3451
3452 pcm_file = file->private_data;
3453 substream = pcm_file->substream;
3454 if (PCM_RUNTIME_CHECK(substream))
3455 return -ENXIO;
3456
3457 offset = area->vm_pgoff << PAGE_SHIFT;
3458 switch (offset) {
3459 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3460 if (pcm_file->no_compat_mmap)
3461 return -ENXIO;
3462 return snd_pcm_mmap_status(substream, file, area);
3463 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3464 if (pcm_file->no_compat_mmap)
3465 return -ENXIO;
3466 return snd_pcm_mmap_control(substream, file, area);
3467 default:
3468 return snd_pcm_mmap_data(substream, file, area);
3469 }
3470 return 0;
3471 }
3472
3473 static int snd_pcm_fasync(int fd, struct file * file, int on)
3474 {
3475 struct snd_pcm_file * pcm_file;
3476 struct snd_pcm_substream *substream;
3477 struct snd_pcm_runtime *runtime;
3478
3479 pcm_file = file->private_data;
3480 substream = pcm_file->substream;
3481 if (PCM_RUNTIME_CHECK(substream))
3482 return -ENXIO;
3483 runtime = substream->runtime;
3484 return fasync_helper(fd, file, on, &runtime->fasync);
3485 }
3486
3487 /*
3488 * ioctl32 compat
3489 */
3490 #ifdef CONFIG_COMPAT
3491 #include "pcm_compat.c"
3492 #else
3493 #define snd_pcm_ioctl_compat NULL
3494 #endif
3495
3496 /*
3497 * To be removed helpers to keep binary compatibility
3498 */
3499
3500 #ifdef CONFIG_SND_SUPPORT_OLD_API
3501 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3502 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3503
3504 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3505 struct snd_pcm_hw_params_old *oparams)
3506 {
3507 unsigned int i;
3508
3509 memset(params, 0, sizeof(*params));
3510 params->flags = oparams->flags;
3511 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3512 params->masks[i].bits[0] = oparams->masks[i];
3513 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3514 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3515 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3516 params->info = oparams->info;
3517 params->msbits = oparams->msbits;
3518 params->rate_num = oparams->rate_num;
3519 params->rate_den = oparams->rate_den;
3520 params->fifo_size = oparams->fifo_size;
3521 }
3522
3523 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3524 struct snd_pcm_hw_params *params)
3525 {
3526 unsigned int i;
3527
3528 memset(oparams, 0, sizeof(*oparams));
3529 oparams->flags = params->flags;
3530 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3531 oparams->masks[i] = params->masks[i].bits[0];
3532 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3533 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3534 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3535 oparams->info = params->info;
3536 oparams->msbits = params->msbits;
3537 oparams->rate_num = params->rate_num;
3538 oparams->rate_den = params->rate_den;
3539 oparams->fifo_size = params->fifo_size;
3540 }
3541
3542 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3543 struct snd_pcm_hw_params_old __user * _oparams)
3544 {
3545 struct snd_pcm_hw_params *params;
3546 struct snd_pcm_hw_params_old *oparams = NULL;
3547 int err;
3548
3549 params = kmalloc(sizeof(*params), GFP_KERNEL);
3550 if (!params)
3551 return -ENOMEM;
3552
3553 oparams = memdup_user(_oparams, sizeof(*oparams));
3554 if (IS_ERR(oparams)) {
3555 err = PTR_ERR(oparams);
3556 goto out;
3557 }
3558 snd_pcm_hw_convert_from_old_params(params, oparams);
3559 err = snd_pcm_hw_refine(substream, params);
3560 snd_pcm_hw_convert_to_old_params(oparams, params);
3561 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3562 if (!err)
3563 err = -EFAULT;
3564 }
3565
3566 kfree(oparams);
3567 out:
3568 kfree(params);
3569 return err;
3570 }
3571
3572 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3573 struct snd_pcm_hw_params_old __user * _oparams)
3574 {
3575 struct snd_pcm_hw_params *params;
3576 struct snd_pcm_hw_params_old *oparams = NULL;
3577 int err;
3578
3579 params = kmalloc(sizeof(*params), GFP_KERNEL);
3580 if (!params)
3581 return -ENOMEM;
3582
3583 oparams = memdup_user(_oparams, sizeof(*oparams));
3584 if (IS_ERR(oparams)) {
3585 err = PTR_ERR(oparams);
3586 goto out;
3587 }
3588 snd_pcm_hw_convert_from_old_params(params, oparams);
3589 err = snd_pcm_hw_params(substream, params);
3590 snd_pcm_hw_convert_to_old_params(oparams, params);
3591 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3592 if (!err)
3593 err = -EFAULT;
3594 }
3595
3596 kfree(oparams);
3597 out:
3598 kfree(params);
3599 return err;
3600 }
3601 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3602
3603 #ifndef CONFIG_MMU
3604 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3605 unsigned long addr,
3606 unsigned long len,
3607 unsigned long pgoff,
3608 unsigned long flags)
3609 {
3610 struct snd_pcm_file *pcm_file = file->private_data;
3611 struct snd_pcm_substream *substream = pcm_file->substream;
3612 struct snd_pcm_runtime *runtime = substream->runtime;
3613 unsigned long offset = pgoff << PAGE_SHIFT;
3614
3615 switch (offset) {
3616 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3617 return (unsigned long)runtime->status;
3618 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3619 return (unsigned long)runtime->control;
3620 default:
3621 return (unsigned long)runtime->dma_area + offset;
3622 }
3623 }
3624 #else
3625 # define snd_pcm_get_unmapped_area NULL
3626 #endif
3627
3628 /*
3629 * Register section
3630 */
3631
3632 const struct file_operations snd_pcm_f_ops[2] = {
3633 {
3634 .owner = THIS_MODULE,
3635 .write = snd_pcm_write,
3636 .aio_write = snd_pcm_aio_write,
3637 .open = snd_pcm_playback_open,
3638 .release = snd_pcm_release,
3639 .llseek = no_llseek,
3640 .poll = snd_pcm_playback_poll,
3641 .unlocked_ioctl = snd_pcm_playback_ioctl,
3642 .compat_ioctl = snd_pcm_ioctl_compat,
3643 .mmap = snd_pcm_mmap,
3644 .fasync = snd_pcm_fasync,
3645 .get_unmapped_area = snd_pcm_get_unmapped_area,
3646 },
3647 {
3648 .owner = THIS_MODULE,
3649 .read = snd_pcm_read,
3650 .aio_read = snd_pcm_aio_read,
3651 .open = snd_pcm_capture_open,
3652 .release = snd_pcm_release,
3653 .llseek = no_llseek,
3654 .poll = snd_pcm_capture_poll,
3655 .unlocked_ioctl = snd_pcm_capture_ioctl,
3656 .compat_ioctl = snd_pcm_ioctl_compat,
3657 .mmap = snd_pcm_mmap,
3658 .fasync = snd_pcm_fasync,
3659 .get_unmapped_area = snd_pcm_get_unmapped_area,
3660 }
3661 };
Linux kernel - Deliverables
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