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ALSA: pcm: trace XRUN event at injection, too
[linux-2.6-block.git] / sound / core / pcm_native.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 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
1da177e4 22#include <linux/mm.h>
da155d5b 23#include <linux/module.h>
1da177e4
LT		 24#include <linux/file.h>
25#include <linux/slab.h>
174cd4b1 26#include <linux/sched/signal.h>
1da177e4 27#include <linux/time.h>
e8db0be1 28#include <linux/pm_qos.h>
6cbbfe1c 29#include <linux/io.h>
657b1989 30#include <linux/dma-mapping.h>
1da177e4
LT		 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>
e2e40f2c 38#include <linux/uio.h>
1da177e4 39
2c4842d3
TS		 40#include "pcm_local.h"
41
37567c55 42#ifdef CONFIG_SND_DEBUG
be4e31da
TS		 43#define CREATE_TRACE_POINTS
44#include "pcm_param_trace.h"
37567c55
TS		 45#else
46#define trace_hw_mask_param_enabled() 0
47#define trace_hw_interval_param_enabled() 0
48#define trace_hw_mask_param(substream, type, index, prev, curr)
49#define trace_hw_interval_param(substream, type, index, prev, curr)
50#endif
be4e31da 51
1da177e4
LT		 52/*
53 * Compatibility
54 */
55
877211f5 56struct snd_pcm_hw_params_old {
1da177e4
LT		 57 unsigned int flags;
58 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
59 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 60 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 61 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
62 unsigned int rmask;
63 unsigned int cmask;
64 unsigned int info;
65 unsigned int msbits;
66 unsigned int rate_num;
67 unsigned int rate_den;
877211f5 68 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 69 unsigned char reserved[64];
70};
71
59d48582 72#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 73#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
74#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 75
877211f5
TI		 76static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
77 struct snd_pcm_hw_params_old __user * _oparams);
78static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
79 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 80#endif
f87135f5 81static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 82
83/*
84 *
85 */
86
7af142f7
TI		 87static DEFINE_RWLOCK(snd_pcm_link_rwlock);
88static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4 89
67ec1072
TI		 90/* Writer in rwsem may block readers even during its waiting in queue,
91 * and this may lead to a deadlock when the code path takes read sem
92 * twice (e.g. one in snd_pcm_action_nonatomic() and another in
93 * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to
94 * spin until it gets the lock.
95 */
96static inline void down_write_nonblock(struct rw_semaphore *lock)
97{
98 while (!down_write_trylock(lock))
99 cond_resched();
100}
101
10aa7cad
AMG		 102#define PCM_LOCK_DEFAULT 0
103#define PCM_LOCK_IRQ 1
104#define PCM_LOCK_IRQSAVE 2
105
106static unsigned long __snd_pcm_stream_lock_mode(struct snd_pcm_substream *substream,
107 unsigned int mode)
108{
109 unsigned long flags = 0;
110 if (substream->pcm->nonatomic) {
111 down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING);
112 mutex_lock(&substream->self_group.mutex);
113 } else {
114 switch (mode) {
115 case PCM_LOCK_DEFAULT:
116 read_lock(&snd_pcm_link_rwlock);
117 break;
118 case PCM_LOCK_IRQ:
119 read_lock_irq(&snd_pcm_link_rwlock);
120 break;
121 case PCM_LOCK_IRQSAVE:
122 read_lock_irqsave(&snd_pcm_link_rwlock, flags);
123 break;
124 }
125 spin_lock(&substream->self_group.lock);
126 }
127 return flags;
128}
129
130static void __snd_pcm_stream_unlock_mode(struct snd_pcm_substream *substream,
131 unsigned int mode, unsigned long flags)
132{
133 if (substream->pcm->nonatomic) {
134 mutex_unlock(&substream->self_group.mutex);
135 up_read(&snd_pcm_link_rwsem);
136 } else {
137 spin_unlock(&substream->self_group.lock);
138
139 switch (mode) {
140 case PCM_LOCK_DEFAULT:
141 read_unlock(&snd_pcm_link_rwlock);
142 break;
143 case PCM_LOCK_IRQ:
144 read_unlock_irq(&snd_pcm_link_rwlock);
145 break;
146 case PCM_LOCK_IRQSAVE:
147 read_unlock_irqrestore(&snd_pcm_link_rwlock, flags);
148 break;
149 }
150 }
151}
152
30b771cf
TI		 153/**
154 * snd_pcm_stream_lock - Lock the PCM stream
155 * @substream: PCM substream
156 *
157 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
158 * flag of the given substream. This also takes the global link rw lock
159 * (or rw sem), too, for avoiding the race with linked streams.
160 */
7af142f7
TI		 161void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
162{
10aa7cad 163 __snd_pcm_stream_lock_mode(substream, PCM_LOCK_DEFAULT);
7af142f7
TI		 164}
165EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
166
30b771cf
TI		 167/**
168 * snd_pcm_stream_lock - Unlock the PCM stream
169 * @substream: PCM substream
170 *
171 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
172 */
7af142f7
TI		 173void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
174{
10aa7cad 175 __snd_pcm_stream_unlock_mode(substream, PCM_LOCK_DEFAULT, 0);
7af142f7
TI		 176}
177EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
178
30b771cf
TI		 179/**
180 * snd_pcm_stream_lock_irq - Lock the PCM stream
181 * @substream: PCM substream
182 *
183 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
184 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
185 * as snd_pcm_stream_lock().
186 */
7af142f7
TI		 187void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
188{
10aa7cad 189 __snd_pcm_stream_lock_mode(substream, PCM_LOCK_IRQ);
7af142f7
TI		 190}
191EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
192
30b771cf
TI		 193/**
194 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
195 * @substream: PCM substream
196 *
197 * This is a counter-part of snd_pcm_stream_lock_irq().
198 */
7af142f7
TI		 199void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
200{
10aa7cad 201 __snd_pcm_stream_unlock_mode(substream, PCM_LOCK_IRQ, 0);
7af142f7
TI		 202}
203EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
204
205unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
206{
10aa7cad 207 return __snd_pcm_stream_lock_mode(substream, PCM_LOCK_IRQSAVE);
7af142f7
TI		 208}
209EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
210
30b771cf
TI		 211/**
212 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
213 * @substream: PCM substream
214 * @flags: irq flags
215 *
216 * This is a counter-part of snd_pcm_stream_lock_irqsave().
217 */
7af142f7
TI		 218void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
219 unsigned long flags)
220{
10aa7cad 221 __snd_pcm_stream_unlock_mode(substream, PCM_LOCK_IRQSAVE, flags);
7af142f7
TI		 222}
223EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
1da177e4 224
877211f5 225int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 226{
877211f5
TI		 227 struct snd_pcm *pcm = substream->pcm;
228 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 229
1da177e4
LT		 230 memset(info, 0, sizeof(*info));
231 info->card = pcm->card->number;
232 info->device = pcm->device;
233 info->stream = substream->stream;
234 info->subdevice = substream->number;
235 strlcpy(info->id, pcm->id, sizeof(info->id));
236 strlcpy(info->name, pcm->name, sizeof(info->name));
237 info->dev_class = pcm->dev_class;
238 info->dev_subclass = pcm->dev_subclass;
239 info->subdevices_count = pstr->substream_count;
240 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
241 strlcpy(info->subname, substream->name, sizeof(info->subname));
e11f0f90 242
1da177e4
LT		 243 return 0;
244}
245
877211f5
TI		 246int snd_pcm_info_user(struct snd_pcm_substream *substream,
247 struct snd_pcm_info __user * _info)
1da177e4 248{
877211f5 249 struct snd_pcm_info *info;
1da177e4
LT		 250 int err;
251
252 info = kmalloc(sizeof(*info), GFP_KERNEL);
253 if (! info)
254 return -ENOMEM;
255 err = snd_pcm_info(substream, info);
256 if (err >= 0) {
257 if (copy_to_user(_info, info, sizeof(*info)))
258 err = -EFAULT;
259 }
260 kfree(info);
261 return err;
262}
263
63825f3a
TI		 264static bool hw_support_mmap(struct snd_pcm_substream *substream)
265{
266 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
267 return false;
85dc0f85
TI		 268 /* architecture supports dma_mmap_coherent()? */
269#if defined(CONFIG_ARCH_NO_COHERENT_DMA_MMAP) || !defined(CONFIG_HAS_DMA)
63825f3a
TI		 270 if (!substream->ops->mmap &&
271 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
272 return false;
273#endif
274 return true;
275}
276
561e1cad
TS		 277static int constrain_mask_params(struct snd_pcm_substream *substream,
278 struct snd_pcm_hw_params *params)
1da177e4 279{
561e1cad
TS		 280 struct snd_pcm_hw_constraints *constrs =
281 &substream->runtime->hw_constraints;
282 struct snd_mask *m;
1da177e4 283 unsigned int k;
561e1cad
TS		 284 struct snd_mask old_mask;
285 int changed;
1da177e4
LT		 286
287 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
288 m = hw_param_mask(params, k);
289 if (snd_mask_empty(m))
290 return -EINVAL;
d81052f9
TS		 291
292 /* This parameter is not requested to change by a caller. */
1da177e4
LT		 293 if (!(params->rmask & (1 << k)))
294 continue;
561e1cad
TS		 295
296 if (trace_hw_mask_param_enabled())
297 old_mask = *m;
298
1da177e4 299 changed = snd_mask_refine(m, constrs_mask(constrs, k));
1da177e4
LT		 300 if (changed < 0)
301 return changed;
82e7d501
TS		 302 if (changed == 0)
303 continue;
561e1cad 304
d81052f9 305 /* Set corresponding flag so that the caller gets it. */
82e7d501
TS		 306 trace_hw_mask_param(substream, k, 0, &old_mask, m);
307 params->cmask |= 1 << k;
1da177e4
LT		 308 }
309
561e1cad
TS		 310 return 0;
311}
312
3432fa04
TS		 313static int constrain_interval_params(struct snd_pcm_substream *substream,
314 struct snd_pcm_hw_params *params)
315{
316 struct snd_pcm_hw_constraints *constrs =
317 &substream->runtime->hw_constraints;
318 struct snd_interval *i;
319 unsigned int k;
320 struct snd_interval old_interval;
321 int changed;
322
1da177e4
LT		 323 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
324 i = hw_param_interval(params, k);
325 if (snd_interval_empty(i))
326 return -EINVAL;
d81052f9
TS		 327
328 /* This parameter is not requested to change by a caller. */
1da177e4
LT		 329 if (!(params->rmask & (1 << k)))
330 continue;
3432fa04
TS		 331
332 if (trace_hw_interval_param_enabled())
333 old_interval = *i;
334
1da177e4 335 changed = snd_interval_refine(i, constrs_interval(constrs, k));
1da177e4
LT		 336 if (changed < 0)
337 return changed;
82e7d501
TS		 338 if (changed == 0)
339 continue;
3432fa04 340
d81052f9 341 /* Set corresponding flag so that the caller gets it. */
82e7d501
TS		 342 trace_hw_interval_param(substream, k, 0, &old_interval, i);
343 params->cmask |= 1 << k;
1da177e4
LT		 344 }
345
3432fa04
TS		 346 return 0;
347}
348
9cc07f55
TS		 349static int constrain_params_by_rules(struct snd_pcm_substream *substream,
350 struct snd_pcm_hw_params *params)
1da177e4 351{
9cc07f55
TS		 352 struct snd_pcm_hw_constraints *constrs =
353 &substream->runtime->hw_constraints;
1da177e4 354 unsigned int k;
5730f9f7 355 unsigned int *rstamps;
1da177e4 356 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
d81052f9 357 unsigned int stamp;
a1c06e39
TS		 358 struct snd_pcm_hw_rule *r;
359 unsigned int d;
9cc07f55
TS		 360 struct snd_mask old_mask;
361 struct snd_interval old_interval;
a1c06e39 362 bool again;
5730f9f7 363 int changed, err = 0;
1da177e4 364
d81052f9
TS		 365 /*
366 * Each application of rule has own sequence number.
367 *
368 * Each member of 'rstamps' array represents the sequence number of
369 * recent application of corresponding rule.
370 */
5730f9f7
TI		 371 rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL);
372 if (!rstamps)
373 return -ENOMEM;
d81052f9
TS		 374
375 /*
376 * Each member of 'vstamps' array represents the sequence number of
377 * recent application of rule in which corresponding parameters were
378 * changed.
379 *
380 * In initial state, elements corresponding to parameters requested by
381 * a caller is 1. For unrequested parameters, corresponding members
382 * have 0 so that the parameters are never changed anymore.
383 */
9cc07f55 384 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
1da177e4 385 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
d81052f9
TS		 386
387 /* Due to the above design, actual sequence number starts at 2. */
388 stamp = 2;
0d4e3999 389retry:
d81052f9 390 /* Apply all rules in order. */
a1c06e39 391 again = false;
0d4e3999 392 for (k = 0; k < constrs->rules_num; k++) {
a1c06e39 393 r = &constrs->rules[k];
d81052f9
TS		 394
395 /*
396 * Check condition bits of this rule. When the rule has
397 * some condition bits, parameter without the bits is
398 * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
399 * is an example of the condition bits.
400 */
0d4e3999
TS		 401 if (r->cond && !(r->cond & params->flags))
402 continue;
d81052f9
TS		 403
404 /*
405 * The 'deps' array includes maximum three dependencies
406 * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fourth
407 * member of this array is a sentinel and should be
408 * negative value.
409 *
410 * This rule should be processed in this time when dependent
411 * parameters were changed at former applications of the other
412 * rules.
413 */
0d4e3999 414 for (d = 0; r->deps[d] >= 0; d++) {
d656b4a6 415 if (vstamps[r->deps[d]] > rstamps[k])
0d4e3999 416 break;
0d4e3999 417 }
d656b4a6 418 if (r->deps[d] < 0)
0d4e3999 419 continue;
be4e31da 420
0d4e3999
TS		 421 if (trace_hw_mask_param_enabled()) {
422 if (hw_is_mask(r->var))
423 old_mask = *hw_param_mask(params, r->var);
424 }
425 if (trace_hw_interval_param_enabled()) {
426 if (hw_is_interval(r->var))
427 old_interval = *hw_param_interval(params, r->var);
428 }
c6706de0 429
0d4e3999 430 changed = r->func(params, r);
5730f9f7
TI		 431 if (changed < 0) {
432 err = changed;
433 goto out;
434 }
c6706de0 435
d81052f9 436 /*
82e7d501 437 * When the parameter is changed, notify it to the caller
d81052f9
TS		 438 * by corresponding returned bit, then preparing for next
439 * iteration.
440 */
0d4e3999 441 if (changed && r->var >= 0) {
82e7d501
TS		 442 if (hw_is_mask(r->var)) {
443 trace_hw_mask_param(substream, r->var,
444 k + 1, &old_mask,
445 hw_param_mask(params, r->var));
1da177e4 446 }
82e7d501
TS		 447 if (hw_is_interval(r->var)) {
448 trace_hw_interval_param(substream, r->var,
449 k + 1, &old_interval,
450 hw_param_interval(params, r->var));
1da177e4 451 }
82e7d501 452
0d4e3999
TS		 453 params->cmask |= (1 << r->var);
454 vstamps[r->var] = stamp;
a1c06e39 455 again = true;
1da177e4 456 }
f74ae15f 457
82e7d501 458 rstamps[k] = stamp++;
0d4e3999
TS		 459 }
460
d81052f9 461 /* Iterate to evaluate all rules till no parameters are changed. */
0d4e3999
TS		 462 if (again)
463 goto retry;
9cc07f55 464
5730f9f7
TI		 465 out:
466 kfree(rstamps);
467 return err;
9cc07f55
TS		 468}
469
f9a076bf
TS		 470static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
471 struct snd_pcm_hw_params *params)
472{
473 const struct snd_interval *i;
474 const struct snd_mask *m;
475 int err;
476
1da177e4 477 if (!params->msbits) {
f9a076bf 478 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
1da177e4
LT		 479 if (snd_interval_single(i))
480 params->msbits = snd_interval_value(i);
481 }
482
483 if (!params->rate_den) {
f9a076bf 484 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 485 if (snd_interval_single(i)) {
486 params->rate_num = snd_interval_value(i);
487 params->rate_den = 1;
488 }
489 }
490
f9a076bf
TS		 491 if (!params->fifo_size) {
492 m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
493 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
494 if (snd_mask_single(m) && snd_interval_single(i)) {
495 err = substream->ops->ioctl(substream,
496 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
497 if (err < 0)
498 return err;
499 }
500 }
501
63825f3a 502 if (!params->info) {
7802fb52
TS		 503 params->info = substream->runtime->hw.info;
504 params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
505 SNDRV_PCM_INFO_DRAIN_TRIGGER);
63825f3a
TI		 506 if (!hw_support_mmap(substream))
507 params->info &= ~(SNDRV_PCM_INFO_MMAP |
508 SNDRV_PCM_INFO_MMAP_VALID);
509 }
7802fb52 510
f9a076bf
TS		 511 return 0;
512}
513
9cc07f55
TS		 514int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
515 struct snd_pcm_hw_params *params)
516{
9cc07f55
TS		 517 int err;
518
519 params->info = 0;
520 params->fifo_size = 0;
521 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
522 params->msbits = 0;
523 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
524 params->rate_num = 0;
525 params->rate_den = 0;
8bea869c 526 }
9cc07f55
TS		 527
528 err = constrain_mask_params(substream, params);
529 if (err < 0)
530 return err;
531
532 err = constrain_interval_params(substream, params);
533 if (err < 0)
534 return err;
535
536 err = constrain_params_by_rules(substream, params);
537 if (err < 0)
538 return err;
539
1da177e4 540 params->rmask = 0;
7802fb52 541
1da177e4
LT		 542 return 0;
543}
e88e8ae6
TI		 544EXPORT_SYMBOL(snd_pcm_hw_refine);
545
877211f5
TI		 546static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
547 struct snd_pcm_hw_params __user * _params)
1da177e4 548{
877211f5 549 struct snd_pcm_hw_params *params;
1da177e4
LT		 550 int err;
551
ef44a1ec
LZ		 552 params = memdup_user(_params, sizeof(*params));
553 if (IS_ERR(params))
554 return PTR_ERR(params);
555
1da177e4 556 err = snd_pcm_hw_refine(substream, params);
f74ae15f
TS		 557 if (err < 0)
558 goto end;
ef44a1ec 559
f74ae15f
TS		 560 err = fixup_unreferenced_params(substream, params);
561 if (err < 0)
562 goto end;
ef44a1ec 563
f74ae15f
TS		 564 if (copy_to_user(_params, params, sizeof(*params)))
565 err = -EFAULT;
566end:
1da177e4
LT		 567 kfree(params);
568 return err;
569}
570
9442e691
TI		 571static int period_to_usecs(struct snd_pcm_runtime *runtime)
572{
573 int usecs;
574
575 if (! runtime->rate)
576 return -1; /* invalid */
577
578 /* take 75% of period time as the deadline */
579 usecs = (750000 / runtime->rate) * runtime->period_size;
580 usecs += ((750000 % runtime->rate) * runtime->period_size) /
581 runtime->rate;
582
583 return usecs;
584}
585
9b0573c0
TI		 586static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
587{
588 snd_pcm_stream_lock_irq(substream);
589 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
590 substream->runtime->status->state = state;
591 snd_pcm_stream_unlock_irq(substream);
592}
593
90bbaf66
JY		 594static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
595 int event)
596{
597#ifdef CONFIG_SND_PCM_TIMER
598 if (substream->timer)
599 snd_timer_notify(substream->timer, event,
600 &substream->runtime->trigger_tstamp);
601#endif
602}
603
60f96aae
TS		 604/**
605 * snd_pcm_hw_param_choose - choose a configuration defined by @params
606 * @pcm: PCM instance
607 * @params: the hw_params instance
608 *
609 * Choose one configuration from configuration space defined by @params.
610 * The configuration chosen is that obtained fixing in this order:
611 * first access, first format, first subformat, min channels,
612 * min rate, min period time, max buffer size, min tick time
613 *
614 * Return: Zero if successful, or a negative error code on failure.
615 */
616static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
617 struct snd_pcm_hw_params *params)
618{
619 static const int vars[] = {
620 SNDRV_PCM_HW_PARAM_ACCESS,
621 SNDRV_PCM_HW_PARAM_FORMAT,
622 SNDRV_PCM_HW_PARAM_SUBFORMAT,
623 SNDRV_PCM_HW_PARAM_CHANNELS,
624 SNDRV_PCM_HW_PARAM_RATE,
625 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
626 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
627 SNDRV_PCM_HW_PARAM_TICK_TIME,
628 -1
629 };
630 const int *v;
7b8a54af
TS		 631 struct snd_mask old_mask;
632 struct snd_interval old_interval;
82e7d501 633 int changed;
60f96aae
TS		 634
635 for (v = vars; *v != -1; v++) {
7b8a54af
TS		 636 /* Keep old parameter to trace. */
637 if (trace_hw_mask_param_enabled()) {
638 if (hw_is_mask(*v))
639 old_mask = *hw_param_mask(params, *v);
640 }
641 if (trace_hw_interval_param_enabled()) {
642 if (hw_is_interval(*v))
643 old_interval = *hw_param_interval(params, *v);
644 }
60f96aae 645 if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
82e7d501 646 changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
60f96aae 647 else
82e7d501 648 changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
e1a3a981 649 if (changed < 0)
82e7d501
TS		 650 return changed;
651 if (changed == 0)
652 continue;
7b8a54af 653
82e7d501 654 /* Trace the changed parameter. */
7b8a54af
TS		 655 if (hw_is_mask(*v)) {
656 trace_hw_mask_param(pcm, *v, 0, &old_mask,
657 hw_param_mask(params, *v));
658 }
659 if (hw_is_interval(*v)) {
660 trace_hw_interval_param(pcm, *v, 0, &old_interval,
661 hw_param_interval(params, *v));
662 }
60f96aae 663 }
7b8a54af 664
60f96aae
TS		 665 return 0;
666}
667
877211f5
TI		 668static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
669 struct snd_pcm_hw_params *params)
1da177e4 670{
877211f5 671 struct snd_pcm_runtime *runtime;
9442e691 672 int err, usecs;
1da177e4
LT		 673 unsigned int bits;
674 snd_pcm_uframes_t frames;
675
7eaa943c
TI		 676 if (PCM_RUNTIME_CHECK(substream))
677 return -ENXIO;
1da177e4 678 runtime = substream->runtime;
1da177e4
LT		 679 snd_pcm_stream_lock_irq(substream);
680 switch (runtime->status->state) {
681 case SNDRV_PCM_STATE_OPEN:
682 case SNDRV_PCM_STATE_SETUP:
683 case SNDRV_PCM_STATE_PREPARED:
684 break;
685 default:
686 snd_pcm_stream_unlock_irq(substream);
687 return -EBADFD;
688 }
689 snd_pcm_stream_unlock_irq(substream);
8eeaa2f9 690#if IS_ENABLED(CONFIG_SND_PCM_OSS)
1da177e4
LT		 691 if (!substream->oss.oss)
692#endif
9c323fcb 693 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 694 return -EBADFD;
695
696 params->rmask = ~0U;
697 err = snd_pcm_hw_refine(substream, params);
698 if (err < 0)
699 goto _error;
700
701 err = snd_pcm_hw_params_choose(substream, params);
702 if (err < 0)
703 goto _error;
704
f9a076bf
TS		 705 err = fixup_unreferenced_params(substream, params);
706 if (err < 0)
707 goto _error;
708
1da177e4
LT		 709 if (substream->ops->hw_params != NULL) {
710 err = substream->ops->hw_params(substream, params);
711 if (err < 0)
712 goto _error;
713 }
714
715 runtime->access = params_access(params);
716 runtime->format = params_format(params);
717 runtime->subformat = params_subformat(params);
718 runtime->channels = params_channels(params);
719 runtime->rate = params_rate(params);
720 runtime->period_size = params_period_size(params);
721 runtime->periods = params_periods(params);
722 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 723 runtime->info = params->info;
724 runtime->rate_num = params->rate_num;
725 runtime->rate_den = params->rate_den;
ab69a490
CL		 726 runtime->no_period_wakeup =
727 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
728 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 729
730 bits = snd_pcm_format_physical_width(runtime->format);
731 runtime->sample_bits = bits;
732 bits *= runtime->channels;
733 runtime->frame_bits = bits;
734 frames = 1;
735 while (bits % 8 != 0) {
736 bits *= 2;
737 frames *= 2;
738 }
739 runtime->byte_align = bits / 8;
740 runtime->min_align = frames;
741
742 /* Default sw params */
743 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
744 runtime->period_step = 1;
1da177e4 745 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 746 runtime->start_threshold = 1;
747 runtime->stop_threshold = runtime->buffer_size;
748 runtime->silence_threshold = 0;
749 runtime->silence_size = 0;
ead4046b
CL		 750 runtime->boundary = runtime->buffer_size;
751 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
752 runtime->boundary *= 2;
1da177e4
LT		 753
754 snd_pcm_timer_resolution_change(substream);
9b0573c0 755 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
9442e691 756
82f68251
JB		 757 if (pm_qos_request_active(&substream->latency_pm_qos_req))
758 pm_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 759 if ((usecs = period_to_usecs(runtime)) >= 0)
82f68251
JB		 760 pm_qos_add_request(&substream->latency_pm_qos_req,
761 PM_QOS_CPU_DMA_LATENCY, usecs);
1da177e4
LT		 762 return 0;
763 _error:
25985edc 764 /* hardware might be unusable from this time,
1da177e4
LT		 765 so we force application to retry to set
766 the correct hardware parameter settings */
9b0573c0 767 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
1da177e4
LT		 768 if (substream->ops->hw_free != NULL)
769 substream->ops->hw_free(substream);
770 return err;
771}
772
877211f5
TI		 773static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
774 struct snd_pcm_hw_params __user * _params)
1da177e4 775{
877211f5 776 struct snd_pcm_hw_params *params;
1da177e4
LT		 777 int err;
778
ef44a1ec
LZ		 779 params = memdup_user(_params, sizeof(*params));
780 if (IS_ERR(params))
781 return PTR_ERR(params);
782
1da177e4 783 err = snd_pcm_hw_params(substream, params);
f74ae15f
TS		 784 if (err < 0)
785 goto end;
ef44a1ec 786
f74ae15f
TS		 787 if (copy_to_user(_params, params, sizeof(*params)))
788 err = -EFAULT;
789end:
1da177e4
LT		 790 kfree(params);
791 return err;
792}
793
877211f5 794static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 795{
877211f5 796 struct snd_pcm_runtime *runtime;
1da177e4
LT		 797 int result = 0;
798
7eaa943c
TI		 799 if (PCM_RUNTIME_CHECK(substream))
800 return -ENXIO;
1da177e4 801 runtime = substream->runtime;
1da177e4
LT		 802 snd_pcm_stream_lock_irq(substream);
803 switch (runtime->status->state) {
804 case SNDRV_PCM_STATE_SETUP:
805 case SNDRV_PCM_STATE_PREPARED:
806 break;
807 default:
808 snd_pcm_stream_unlock_irq(substream);
809 return -EBADFD;
810 }
811 snd_pcm_stream_unlock_irq(substream);
9c323fcb 812 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 813 return -EBADFD;
814 if (substream->ops->hw_free)
815 result = substream->ops->hw_free(substream);
9b0573c0 816 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
82f68251 817 pm_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 818 return result;
819}
820
877211f5
TI		 821static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
822 struct snd_pcm_sw_params *params)
1da177e4 823{
877211f5 824 struct snd_pcm_runtime *runtime;
1250932e 825 int err;
1da177e4 826
7eaa943c
TI		 827 if (PCM_RUNTIME_CHECK(substream))
828 return -ENXIO;
1da177e4 829 runtime = substream->runtime;
1da177e4
LT		 830 snd_pcm_stream_lock_irq(substream);
831 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
832 snd_pcm_stream_unlock_irq(substream);
833 return -EBADFD;
834 }
835 snd_pcm_stream_unlock_irq(substream);
836
145d92e7
DC		 837 if (params->tstamp_mode < 0 ||
838 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
1da177e4 839 return -EINVAL;
58900810
TI		 840 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
841 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
5646eda5 842 return -EINVAL;
1da177e4
LT		 843 if (params->avail_min == 0)
844 return -EINVAL;
1da177e4
LT		 845 if (params->silence_size >= runtime->boundary) {
846 if (params->silence_threshold != 0)
847 return -EINVAL;
848 } else {
849 if (params->silence_size > params->silence_threshold)
850 return -EINVAL;
851 if (params->silence_threshold > runtime->buffer_size)
852 return -EINVAL;
853 }
1250932e 854 err = 0;
1da177e4
LT		 855 snd_pcm_stream_lock_irq(substream);
856 runtime->tstamp_mode = params->tstamp_mode;
58900810
TI		 857 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
858 runtime->tstamp_type = params->tstamp_type;
1da177e4
LT		 859 runtime->period_step = params->period_step;
860 runtime->control->avail_min = params->avail_min;
861 runtime->start_threshold = params->start_threshold;
862 runtime->stop_threshold = params->stop_threshold;
863 runtime->silence_threshold = params->silence_threshold;
864 runtime->silence_size = params->silence_size;
1da177e4
LT		 865 params->boundary = runtime->boundary;
866 if (snd_pcm_running(substream)) {
1da177e4
LT		 867 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
868 runtime->silence_size > 0)
869 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 870 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 871 }
872 snd_pcm_stream_unlock_irq(substream);
1250932e 873 return err;
1da177e4
LT		 874}
875
877211f5
TI		 876static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
877 struct snd_pcm_sw_params __user * _params)
1da177e4 878{
877211f5 879 struct snd_pcm_sw_params params;
1da177e4
LT		 880 int err;
881 if (copy_from_user(&params, _params, sizeof(params)))
882 return -EFAULT;
883 err = snd_pcm_sw_params(substream, &params);
884 if (copy_to_user(_params, &params, sizeof(params)))
885 return -EFAULT;
886 return err;
887}
888
c99c5a3b
TI		 889static inline snd_pcm_uframes_t
890snd_pcm_calc_delay(struct snd_pcm_substream *substream)
891{
892 snd_pcm_uframes_t delay;
893
894 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
895 delay = snd_pcm_playback_hw_avail(substream->runtime);
896 else
897 delay = snd_pcm_capture_avail(substream->runtime);
898 return delay + substream->runtime->delay;
899}
900
877211f5
TI		 901int snd_pcm_status(struct snd_pcm_substream *substream,
902 struct snd_pcm_status *status)
1da177e4 903{
877211f5 904 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 905
906 snd_pcm_stream_lock_irq(substream);
3179f620
PLB		 907
908 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
909 &runtime->audio_tstamp_config);
910
911 /* backwards compatible behavior */
912 if (runtime->audio_tstamp_config.type_requested ==
913 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
914 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
915 runtime->audio_tstamp_config.type_requested =
916 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
917 else
918 runtime->audio_tstamp_config.type_requested =
919 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
920 runtime->audio_tstamp_report.valid = 0;
921 } else
922 runtime->audio_tstamp_report.valid = 1;
923
1da177e4
LT		 924 status->state = runtime->status->state;
925 status->suspended_state = runtime->status->suspended_state;
926 if (status->state == SNDRV_PCM_STATE_OPEN)
927 goto _end;
928 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 929 if (snd_pcm_running(substream)) {
1da177e4 930 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 931 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
932 status->tstamp = runtime->status->tstamp;
3179f620 933 status->driver_tstamp = runtime->driver_tstamp;
4eeaaeae
PLB		 934 status->audio_tstamp =
935 runtime->status->audio_tstamp;
3179f620
PLB		 936 if (runtime->audio_tstamp_report.valid == 1)
937 /* backwards compatibility, no report provided in COMPAT mode */
938 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
939 &status->audio_tstamp_accuracy,
940 &runtime->audio_tstamp_report);
941
8c121586
JK		 942 goto _tstamp_end;
943 }
0d59b814
PLB		 944 } else {
945 /* get tstamp only in fallback mode and only if enabled */
946 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
947 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 948 }
8c121586 949 _tstamp_end:
1da177e4
LT		 950 status->appl_ptr = runtime->control->appl_ptr;
951 status->hw_ptr = runtime->status->hw_ptr;
763e5067 952 status->avail = snd_pcm_avail(substream);
c99c5a3b
TI		 953 status->delay = snd_pcm_running(substream) ?
954 snd_pcm_calc_delay(substream) : 0;
1da177e4
LT		 955 status->avail_max = runtime->avail_max;
956 status->overrange = runtime->overrange;
957 runtime->avail_max = 0;
958 runtime->overrange = 0;
959 _end:
960 snd_pcm_stream_unlock_irq(substream);
961 return 0;
962}
963
877211f5 964static int snd_pcm_status_user(struct snd_pcm_substream *substream,
38ca2a4d
PLB		 965 struct snd_pcm_status __user * _status,
966 bool ext)
1da177e4 967{
877211f5 968 struct snd_pcm_status status;
1da177e4 969 int res;
38ca2a4d 970
1da177e4 971 memset(&status, 0, sizeof(status));
38ca2a4d
PLB		 972 /*
973 * with extension, parameters are read/write,
974 * get audio_tstamp_data from user,
975 * ignore rest of status structure
976 */
977 if (ext && get_user(status.audio_tstamp_data,
978 (u32 __user *)(&_status->audio_tstamp_data)))
979 return -EFAULT;
1da177e4
LT		 980 res = snd_pcm_status(substream, &status);
981 if (res < 0)
982 return res;
983 if (copy_to_user(_status, &status, sizeof(status)))
984 return -EFAULT;
985 return 0;
986}
987
877211f5
TI		 988static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
989 struct snd_pcm_channel_info * info)
1da177e4 990{
877211f5 991 struct snd_pcm_runtime *runtime;
1da177e4
LT		 992 unsigned int channel;
993
1da177e4
LT		 994 channel = info->channel;
995 runtime = substream->runtime;
996 snd_pcm_stream_lock_irq(substream);
997 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
998 snd_pcm_stream_unlock_irq(substream);
999 return -EBADFD;
1000 }
1001 snd_pcm_stream_unlock_irq(substream);
1002 if (channel >= runtime->channels)
1003 return -EINVAL;
1004 memset(info, 0, sizeof(*info));
1005 info->channel = channel;
1006 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
1007}
1008
877211f5
TI		 1009static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
1010 struct snd_pcm_channel_info __user * _info)
1da177e4 1011{
877211f5 1012 struct snd_pcm_channel_info info;
1da177e4
LT		 1013 int res;
1014
1015 if (copy_from_user(&info, _info, sizeof(info)))
1016 return -EFAULT;
1017 res = snd_pcm_channel_info(substream, &info);
1018 if (res < 0)
1019 return res;
1020 if (copy_to_user(_info, &info, sizeof(info)))
1021 return -EFAULT;
1022 return 0;
1023}
1024
877211f5 1025static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 1026{
877211f5 1027 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1028 if (runtime->trigger_master == NULL)
1029 return;
1030 if (runtime->trigger_master == substream) {
2b79d7a6
PLB		 1031 if (!runtime->trigger_tstamp_latched)
1032 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 1033 } else {
1034 snd_pcm_trigger_tstamp(runtime->trigger_master);
1035 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
1036 }
1037 runtime->trigger_master = NULL;
1038}
1039
1040struct action_ops {
877211f5
TI		 1041 int (*pre_action)(struct snd_pcm_substream *substream, int state);
1042 int (*do_action)(struct snd_pcm_substream *substream, int state);
1043 void (*undo_action)(struct snd_pcm_substream *substream, int state);
1044 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 1045};
1046
1047/*
1048 * this functions is core for handling of linked stream
1049 * Note: the stream state might be changed also on failure
1050 * Note2: call with calling stream lock + link lock
1051 */
b17154cf 1052static int snd_pcm_action_group(const struct action_ops *ops,
877211f5 1053 struct snd_pcm_substream *substream,
1da177e4
LT		 1054 int state, int do_lock)
1055{
877211f5
TI		 1056 struct snd_pcm_substream *s = NULL;
1057 struct snd_pcm_substream *s1;
dde1c652 1058 int res = 0, depth = 1;
1da177e4 1059
ef991b95 1060 snd_pcm_group_for_each_entry(s, substream) {
257f8cce
TI		 1061 if (do_lock && s != substream) {
1062 if (s->pcm->nonatomic)
dde1c652 1063 mutex_lock_nested(&s->self_group.mutex, depth);
257f8cce 1064 else
dde1c652
TI		 1065 spin_lock_nested(&s->self_group.lock, depth);
1066 depth++;
257f8cce 1067 }
1da177e4
LT		 1068 res = ops->pre_action(s, state);
1069 if (res < 0)
1070 goto _unlock;
1071 }
ef991b95 1072 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 1073 res = ops->do_action(s, state);
1074 if (res < 0) {
1075 if (ops->undo_action) {
ef991b95 1076 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 1077 if (s1 == s) /* failed stream */
1078 break;
1079 ops->undo_action(s1, state);
1080 }
1081 }
1082 s = NULL; /* unlock all */
1083 goto _unlock;
1084 }
1085 }
ef991b95 1086 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 1087 ops->post_action(s, state);
1088 }
1089 _unlock:
1090 if (do_lock) {
1091 /* unlock streams */
ef991b95 1092 snd_pcm_group_for_each_entry(s1, substream) {
257f8cce 1093 if (s1 != substream) {
811deede 1094 if (s1->pcm->nonatomic)
257f8cce
TI		 1095 mutex_unlock(&s1->self_group.mutex);
1096 else
1097 spin_unlock(&s1->self_group.lock);
1098 }
1da177e4
LT		 1099 if (s1 == s) /* end */
1100 break;
1101 }
1102 }
1103 return res;
1104}
1105
1106/*
1107 * Note: call with stream lock
1108 */
b17154cf 1109static int snd_pcm_action_single(const struct action_ops *ops,
877211f5 1110 struct snd_pcm_substream *substream,
1da177e4
LT		 1111 int state)
1112{
1113 int res;
1114
1115 res = ops->pre_action(substream, state);
1116 if (res < 0)
1117 return res;
1118 res = ops->do_action(substream, state);
1119 if (res == 0)
1120 ops->post_action(substream, state);
1121 else if (ops->undo_action)
1122 ops->undo_action(substream, state);
1123 return res;
1124}
1125
aa8edd8c
TI		 1126/*
1127 * Note: call with stream lock
1128 */
b17154cf 1129static int snd_pcm_action(const struct action_ops *ops,
aa8edd8c
TI		 1130 struct snd_pcm_substream *substream,
1131 int state)
257f8cce
TI		 1132{
1133 int res;
1134
aa8edd8c
TI		 1135 if (!snd_pcm_stream_linked(substream))
1136 return snd_pcm_action_single(ops, substream, state);
1137
1138 if (substream->pcm->nonatomic) {
257f8cce
TI		 1139 if (!mutex_trylock(&substream->group->mutex)) {
1140 mutex_unlock(&substream->self_group.mutex);
1141 mutex_lock(&substream->group->mutex);
1142 mutex_lock(&substream->self_group.mutex);
1143 }
1144 res = snd_pcm_action_group(ops, substream, state, 1);
1145 mutex_unlock(&substream->group->mutex);
1146 } else {
1da177e4
LT		 1147 if (!spin_trylock(&substream->group->lock)) {
1148 spin_unlock(&substream->self_group.lock);
1149 spin_lock(&substream->group->lock);
1150 spin_lock(&substream->self_group.lock);
1151 }
1152 res = snd_pcm_action_group(ops, substream, state, 1);
1153 spin_unlock(&substream->group->lock);
1da177e4
LT		 1154 }
1155 return res;
1156}
1157
1158/*
1159 * Note: don't use any locks before
1160 */
b17154cf 1161static int snd_pcm_action_lock_irq(const struct action_ops *ops,
877211f5 1162 struct snd_pcm_substream *substream,
1da177e4
LT		 1163 int state)
1164{
1165 int res;
1166
e3a4bd5e
TI		 1167 snd_pcm_stream_lock_irq(substream);
1168 res = snd_pcm_action(ops, substream, state);
1169 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1170 return res;
1171}
1172
1173/*
1174 */
b17154cf 1175static int snd_pcm_action_nonatomic(const struct action_ops *ops,
877211f5 1176 struct snd_pcm_substream *substream,
1da177e4
LT		 1177 int state)
1178{
1179 int res;
1180
1181 down_read(&snd_pcm_link_rwsem);
1182 if (snd_pcm_stream_linked(substream))
1183 res = snd_pcm_action_group(ops, substream, state, 0);
1184 else
1185 res = snd_pcm_action_single(ops, substream, state);
1186 up_read(&snd_pcm_link_rwsem);
1187 return res;
1188}
1189
1190/*
1191 * start callbacks
1192 */
877211f5 1193static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 1194{
877211f5 1195 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1196 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1197 return -EBADFD;
1198 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1199 !snd_pcm_playback_data(substream))
1200 return -EPIPE;
2b79d7a6 1201 runtime->trigger_tstamp_latched = false;
1da177e4
LT		 1202 runtime->trigger_master = substream;
1203 return 0;
1204}
1205
877211f5 1206static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1207{
1208 if (substream->runtime->trigger_master != substream)
1209 return 0;
1210 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1211}
1212
877211f5 1213static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1214{
1215 if (substream->runtime->trigger_master == substream)
1216 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1217}
1218
877211f5 1219static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 1220{
877211f5 1221 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1222 snd_pcm_trigger_tstamp(substream);
6af3fb72 1223 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 1224 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1225 runtime->rate;
1da177e4
LT		 1226 runtime->status->state = state;
1227 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1228 runtime->silence_size > 0)
1229 snd_pcm_playback_silence(substream, ULONG_MAX);
90bbaf66 1230 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
1da177e4
LT		 1231}
1232
b17154cf 1233static const struct action_ops snd_pcm_action_start = {
1da177e4
LT		 1234 .pre_action = snd_pcm_pre_start,
1235 .do_action = snd_pcm_do_start,
1236 .undo_action = snd_pcm_undo_start,
1237 .post_action = snd_pcm_post_start
1238};
1239
1240/**
1c85cc64 1241 * snd_pcm_start - start all linked streams
df8db936 1242 * @substream: the PCM substream instance
eb7c06e8
YB		 1243 *
1244 * Return: Zero if successful, or a negative error code.
c2c86a97 1245 * The stream lock must be acquired before calling this function.
1da177e4 1246 */
877211f5 1247int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 1248{
877211f5
TI		 1249 return snd_pcm_action(&snd_pcm_action_start, substream,
1250 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 1251}
1252
c2c86a97
TI		 1253/* take the stream lock and start the streams */
1254static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
1255{
1256 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
1257 SNDRV_PCM_STATE_RUNNING);
1258}
1259
1da177e4
LT		 1260/*
1261 * stop callbacks
1262 */
877211f5 1263static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1264{
877211f5 1265 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1266 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1267 return -EBADFD;
1268 runtime->trigger_master = substream;
1269 return 0;
1270}
1271
877211f5 1272static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1273{
1274 if (substream->runtime->trigger_master == substream &&
1275 snd_pcm_running(substream))
1276 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1277 return 0; /* unconditonally stop all substreams */
1278}
1279
877211f5 1280static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1281{
877211f5 1282 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1283 if (runtime->status->state != state) {
1284 snd_pcm_trigger_tstamp(substream);
9bc889b4 1285 runtime->status->state = state;
90bbaf66 1286 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
1da177e4
LT		 1287 }
1288 wake_up(&runtime->sleep);
c91a988d 1289 wake_up(&runtime->tsleep);
1da177e4
LT		 1290}
1291
b17154cf 1292static const struct action_ops snd_pcm_action_stop = {
1da177e4
LT		 1293 .pre_action = snd_pcm_pre_stop,
1294 .do_action = snd_pcm_do_stop,
1295 .post_action = snd_pcm_post_stop
1296};
1297
1298/**
1c85cc64 1299 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 1300 * @substream: the PCM substream instance
1301 * @state: PCM state after stopping the stream
1da177e4 1302 *
1c85cc64 1303 * The state of each stream is then changed to the given state unconditionally.
eb7c06e8 1304 *
0a11458c 1305 * Return: Zero if successful, or a negative error code.
1da177e4 1306 */
fea952e5 1307int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 1308{
1309 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1310}
e88e8ae6
TI		 1311EXPORT_SYMBOL(snd_pcm_stop);
1312
1da177e4 1313/**
1c85cc64 1314 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 1315 * @substream: the PCM substream
1da177e4 1316 *
1c85cc64 1317 * After stopping, the state is changed to SETUP.
1da177e4 1318 * Unlike snd_pcm_stop(), this affects only the given stream.
eb7c06e8
YB		 1319 *
1320 * Return: Zero if succesful, or a negative error code.
1da177e4 1321 */
877211f5 1322int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 1323{
877211f5
TI		 1324 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1325 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 1326}
1327
1fb8510c
TI		 1328/**
1329 * snd_pcm_stop_xrun - stop the running streams as XRUN
1330 * @substream: the PCM substream instance
1fb8510c
TI		 1331 *
1332 * This stops the given running substream (and all linked substreams) as XRUN.
1333 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1334 *
1335 * Return: Zero if successful, or a negative error code.
1336 */
1337int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1338{
1339 unsigned long flags;
1fb8510c
TI		 1340
1341 snd_pcm_stream_lock_irqsave(substream, flags);
1342 if (snd_pcm_running(substream))
9cd641ed 1343 __snd_pcm_xrun(substream);
1fb8510c 1344 snd_pcm_stream_unlock_irqrestore(substream, flags);
9cd641ed 1345 return 0;
1fb8510c
TI		 1346}
1347EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1348
1da177e4
LT		 1349/*
1350 * pause callbacks
1351 */
877211f5 1352static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1353{
877211f5 1354 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1355 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1356 return -ENOSYS;
1357 if (push) {
1358 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1359 return -EBADFD;
1360 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1361 return -EBADFD;
1362 runtime->trigger_master = substream;
1363 return 0;
1364}
1365
877211f5 1366static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1367{
1368 if (substream->runtime->trigger_master != substream)
1369 return 0;
56385a12
JK		 1370 /* some drivers might use hw_ptr to recover from the pause -
1371 update the hw_ptr now */
1372 if (push)
1373 snd_pcm_update_hw_ptr(substream);
6af3fb72 1374 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 1375 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1376 * delta, effectively to skip the check once.
1377 */
1378 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 1379 return substream->ops->trigger(substream,
1380 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1381 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1382}
1383
877211f5 1384static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1385{
1386 if (substream->runtime->trigger_master == substream)
1387 substream->ops->trigger(substream,
1388 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1389 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1390}
1391
877211f5 1392static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1393{
877211f5 1394 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1395 snd_pcm_trigger_tstamp(substream);
1396 if (push) {
1397 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
90bbaf66 1398 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
1da177e4 1399 wake_up(&runtime->sleep);
c91a988d 1400 wake_up(&runtime->tsleep);
1da177e4
LT		 1401 } else {
1402 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
90bbaf66 1403 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
1da177e4
LT		 1404 }
1405}
1406
b17154cf 1407static const struct action_ops snd_pcm_action_pause = {
1da177e4
LT		 1408 .pre_action = snd_pcm_pre_pause,
1409 .do_action = snd_pcm_do_pause,
1410 .undo_action = snd_pcm_undo_pause,
1411 .post_action = snd_pcm_post_pause
1412};
1413
1414/*
1415 * Push/release the pause for all linked streams.
1416 */
877211f5 1417static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1418{
1419 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1420}
1421
1422#ifdef CONFIG_PM
1423/* suspend */
1424
877211f5 1425static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1426{
877211f5 1427 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1428 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1429 return -EBUSY;
1430 runtime->trigger_master = substream;
1431 return 0;
1432}
1433
877211f5 1434static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1435{
877211f5 1436 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1437 if (runtime->trigger_master != substream)
1438 return 0;
1439 if (! snd_pcm_running(substream))
1440 return 0;
1441 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1442 return 0; /* suspend unconditionally */
1443}
1444
877211f5 1445static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1446{
877211f5 1447 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1448 snd_pcm_trigger_tstamp(substream);
9bc889b4
TI		 1449 runtime->status->suspended_state = runtime->status->state;
1450 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
90bbaf66 1451 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
1da177e4 1452 wake_up(&runtime->sleep);
c91a988d 1453 wake_up(&runtime->tsleep);
1da177e4
LT		 1454}
1455
b17154cf 1456static const struct action_ops snd_pcm_action_suspend = {
1da177e4
LT		 1457 .pre_action = snd_pcm_pre_suspend,
1458 .do_action = snd_pcm_do_suspend,
1459 .post_action = snd_pcm_post_suspend
1460};
1461
1462/**
1c85cc64 1463 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1464 * @substream: the PCM substream
1da177e4 1465 *
1da177e4 1466 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1467 *
1468 * Return: Zero if successful (or @substream is %NULL), or a negative error
1469 * code.
1da177e4 1470 */
877211f5 1471int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1472{
1473 int err;
1474 unsigned long flags;
1475
603bf524
TI		 1476 if (! substream)
1477 return 0;
1478
1da177e4
LT		 1479 snd_pcm_stream_lock_irqsave(substream, flags);
1480 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1481 snd_pcm_stream_unlock_irqrestore(substream, flags);
1482 return err;
1483}
e88e8ae6
TI		 1484EXPORT_SYMBOL(snd_pcm_suspend);
1485
1da177e4 1486/**
1c85cc64 1487 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1488 * @pcm: the PCM instance
1da177e4 1489 *
1da177e4 1490 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1491 *
1492 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1da177e4 1493 */
877211f5 1494int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1495{
877211f5 1496 struct snd_pcm_substream *substream;
1da177e4
LT		 1497 int stream, err = 0;
1498
603bf524
TI		 1499 if (! pcm)
1500 return 0;
1501
1da177e4 1502 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1503 for (substream = pcm->streams[stream].substream;
1504 substream; substream = substream->next) {
1da177e4
LT		 1505 /* FIXME: the open/close code should lock this as well */
1506 if (substream->runtime == NULL)
1507 continue;
1508 err = snd_pcm_suspend(substream);
1509 if (err < 0 && err != -EBUSY)
1510 return err;
1511 }
1512 }
1513 return 0;
1514}
e88e8ae6
TI		 1515EXPORT_SYMBOL(snd_pcm_suspend_all);
1516
1da177e4
LT		 1517/* resume */
1518
877211f5 1519static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1520{
877211f5 1521 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1522 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1523 return -ENOSYS;
1524 runtime->trigger_master = substream;
1525 return 0;
1526}
1527
877211f5 1528static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1529{
877211f5 1530 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1531 if (runtime->trigger_master != substream)
1532 return 0;
1533 /* DMA not running previously? */
1534 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1535 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1536 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1537 return 0;
1538 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1539}
1540
877211f5 1541static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1542{
1543 if (substream->runtime->trigger_master == substream &&
1544 snd_pcm_running(substream))
1545 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1546}
1547
877211f5 1548static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1549{
877211f5 1550 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1551 snd_pcm_trigger_tstamp(substream);
9bc889b4 1552 runtime->status->state = runtime->status->suspended_state;
90bbaf66 1553 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
1da177e4
LT		 1554}
1555
b17154cf 1556static const struct action_ops snd_pcm_action_resume = {
1da177e4
LT		 1557 .pre_action = snd_pcm_pre_resume,
1558 .do_action = snd_pcm_do_resume,
1559 .undo_action = snd_pcm_undo_resume,
1560 .post_action = snd_pcm_post_resume
1561};
1562
877211f5 1563static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1564{
68b4acd3 1565 return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1da177e4
LT		 1566}
1567
1568#else
1569
877211f5 1570static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1571{
1572 return -ENOSYS;
1573}
1574
1575#endif /* CONFIG_PM */
1576
1577/*
1578 * xrun ioctl
1579 *
1580 * Change the RUNNING stream(s) to XRUN state.
1581 */
877211f5 1582static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1583{
877211f5 1584 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1585 int result;
1586
1da177e4
LT		 1587 snd_pcm_stream_lock_irq(substream);
1588 switch (runtime->status->state) {
1589 case SNDRV_PCM_STATE_XRUN:
1590 result = 0; /* already there */
1591 break;
1592 case SNDRV_PCM_STATE_RUNNING:
9cd641ed
TI		 1593 __snd_pcm_xrun(substream);
1594 result = 0;
1da177e4
LT		 1595 break;
1596 default:
1597 result = -EBADFD;
1598 }
1599 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1600 return result;
1601}
1602
1603/*
1604 * reset ioctl
1605 */
877211f5 1606static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1607{
877211f5 1608 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1609 switch (runtime->status->state) {
1610 case SNDRV_PCM_STATE_RUNNING:
1611 case SNDRV_PCM_STATE_PREPARED:
1612 case SNDRV_PCM_STATE_PAUSED:
1613 case SNDRV_PCM_STATE_SUSPENDED:
1614 return 0;
1615 default:
1616 return -EBADFD;
1617 }
1618}
1619
877211f5 1620static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1621{
877211f5 1622 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1623 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1624 if (err < 0)
1625 return err;
1da177e4 1626 runtime->hw_ptr_base = 0;
e7636925
JK		 1627 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1628 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1629 runtime->silence_start = runtime->status->hw_ptr;
1630 runtime->silence_filled = 0;
1631 return 0;
1632}
1633
877211f5 1634static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1635{
877211f5 1636 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1637 runtime->control->appl_ptr = runtime->status->hw_ptr;
1638 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1639 runtime->silence_size > 0)
1640 snd_pcm_playback_silence(substream, ULONG_MAX);
1641}
1642
b17154cf 1643static const struct action_ops snd_pcm_action_reset = {
1da177e4
LT		 1644 .pre_action = snd_pcm_pre_reset,
1645 .do_action = snd_pcm_do_reset,
1646 .post_action = snd_pcm_post_reset
1647};
1648
877211f5 1649static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1650{
1651 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1652}
1653
1654/*
1655 * prepare ioctl
1656 */
0df63e44
TI		 1657/* we use the second argument for updating f_flags */
1658static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1659 int f_flags)
1da177e4 1660{
877211f5 1661 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1662 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1663 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1664 return -EBADFD;
1665 if (snd_pcm_running(substream))
1666 return -EBUSY;
0df63e44 1667 substream->f_flags = f_flags;
1da177e4
LT		 1668 return 0;
1669}
1670
877211f5 1671static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1672{
1673 int err;
1674 err = substream->ops->prepare(substream);
1675 if (err < 0)
1676 return err;
1677 return snd_pcm_do_reset(substream, 0);
1678}
1679
877211f5 1680static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1681{
877211f5 1682 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1683 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1684 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1685}
1686
b17154cf 1687static const struct action_ops snd_pcm_action_prepare = {
1da177e4
LT		 1688 .pre_action = snd_pcm_pre_prepare,
1689 .do_action = snd_pcm_do_prepare,
1690 .post_action = snd_pcm_post_prepare
1691};
1692
1693/**
1c85cc64 1694 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1695 * @substream: the PCM substream instance
0df63e44 1696 * @file: file to refer f_flags
eb7c06e8
YB		 1697 *
1698 * Return: Zero if successful, or a negative error code.
1da177e4 1699 */
0df63e44
TI		 1700static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1701 struct file *file)
1da177e4 1702{
0df63e44
TI		 1703 int f_flags;
1704
1705 if (file)
1706 f_flags = file->f_flags;
1707 else
1708 f_flags = substream->f_flags;
1da177e4 1709
1b745cd9
TI		 1710 snd_pcm_stream_lock_irq(substream);
1711 switch (substream->runtime->status->state) {
1712 case SNDRV_PCM_STATE_PAUSED:
1713 snd_pcm_pause(substream, 0);
1714 /* fallthru */
1715 case SNDRV_PCM_STATE_SUSPENDED:
1716 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1717 break;
1718 }
1719 snd_pcm_stream_unlock_irq(substream);
1720
68b4acd3
TI		 1721 return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1722 substream, f_flags);
1da177e4
LT		 1723}
1724
1725/*
1726 * drain ioctl
1727 */
1728
877211f5 1729static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1730{
4f7c39dc
TI		 1731 struct snd_pcm_runtime *runtime = substream->runtime;
1732 switch (runtime->status->state) {
1733 case SNDRV_PCM_STATE_OPEN:
1734 case SNDRV_PCM_STATE_DISCONNECTED:
1735 case SNDRV_PCM_STATE_SUSPENDED:
1736 return -EBADFD;
1737 }
1738 runtime->trigger_master = substream;
1da177e4
LT		 1739 return 0;
1740}
1741
877211f5 1742static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1743{
877211f5 1744 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1745 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1746 switch (runtime->status->state) {
1747 case SNDRV_PCM_STATE_PREPARED:
1748 /* start playback stream if possible */
1749 if (! snd_pcm_playback_empty(substream)) {
1750 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1751 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
70372a75
TI		 1752 } else {
1753 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1da177e4
LT		 1754 }
1755 break;
1756 case SNDRV_PCM_STATE_RUNNING:
1757 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1758 break;
4f7c39dc
TI		 1759 case SNDRV_PCM_STATE_XRUN:
1760 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1761 break;
1da177e4
LT		 1762 default:
1763 break;
1764 }
1765 } else {
1766 /* stop running stream */
1767 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1768 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1769 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1770 snd_pcm_do_stop(substream, new_state);
1771 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1772 }
1773 }
48d88297
LY		 1774
1775 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1776 runtime->trigger_master == substream &&
1777 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1778 return substream->ops->trigger(substream,
1779 SNDRV_PCM_TRIGGER_DRAIN);
1780
1da177e4
LT		 1781 return 0;
1782}
1783
877211f5 1784static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1785{
1786}
1787
b17154cf 1788static const struct action_ops snd_pcm_action_drain_init = {
1da177e4
LT		 1789 .pre_action = snd_pcm_pre_drain_init,
1790 .do_action = snd_pcm_do_drain_init,
1791 .post_action = snd_pcm_post_drain_init
1792};
1793
877211f5 1794static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1795
1796/*
1797 * Drain the stream(s).
1798 * When the substream is linked, sync until the draining of all playback streams
1799 * is finished.
1800 * After this call, all streams are supposed to be either SETUP or DRAINING
1801 * (capture only) state.
1802 */
4cdc115f
TI		 1803static int snd_pcm_drain(struct snd_pcm_substream *substream,
1804 struct file *file)
1da177e4 1805{
877211f5
TI		 1806 struct snd_card *card;
1807 struct snd_pcm_runtime *runtime;
ef991b95 1808 struct snd_pcm_substream *s;
ac6424b9 1809 wait_queue_entry_t wait;
1da177e4 1810 int result = 0;
4cdc115f 1811 int nonblock = 0;
1da177e4 1812
1da177e4
LT		 1813 card = substream->pcm->card;
1814 runtime = substream->runtime;
1815
1816 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1817 return -EBADFD;
1818
4cdc115f
TI		 1819 if (file) {
1820 if (file->f_flags & O_NONBLOCK)
1821 nonblock = 1;
1822 } else if (substream->f_flags & O_NONBLOCK)
1823 nonblock = 1;
1824
21cb2a2e 1825 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1826 snd_pcm_stream_lock_irq(substream);
1827 /* resume pause */
d3a7dcfe 1828 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1829 snd_pcm_pause(substream, 0);
1830
1831 /* pre-start/stop - all running streams are changed to DRAINING state */
1832 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1833 if (result < 0)
1834 goto unlock;
1835 /* in non-blocking, we don't wait in ioctl but let caller poll */
1836 if (nonblock) {
1837 result = -EAGAIN;
1838 goto unlock;
21cb2a2e 1839 }
1da177e4
LT		 1840
1841 for (;;) {
1842 long tout;
d3a7dcfe 1843 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1844 if (signal_pending(current)) {
1845 result = -ERESTARTSYS;
1846 break;
1847 }
d3a7dcfe
TI		 1848 /* find a substream to drain */
1849 to_check = NULL;
1850 snd_pcm_group_for_each_entry(s, substream) {
1851 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1852 continue;
1853 runtime = s->runtime;
1854 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1855 to_check = runtime;
21cb2a2e 1856 break;
d3a7dcfe 1857 }
21cb2a2e 1858 }
d3a7dcfe
TI		 1859 if (!to_check)
1860 break; /* all drained */
1861 init_waitqueue_entry(&wait, current);
1862 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1863 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1864 up_read(&snd_pcm_link_rwsem);
f2b3614c
TI		 1865 if (runtime->no_period_wakeup)
1866 tout = MAX_SCHEDULE_TIMEOUT;
1867 else {
1868 tout = 10;
1869 if (runtime->rate) {
1870 long t = runtime->period_size * 2 / runtime->rate;
1871 tout = max(t, tout);
1872 }
1873 tout = msecs_to_jiffies(tout * 1000);
1874 }
1875 tout = schedule_timeout_interruptible(tout);
d3a7dcfe 1876 down_read(&snd_pcm_link_rwsem);
1da177e4 1877 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1878 remove_wait_queue(&to_check->sleep, &wait);
0914f796
TI		 1879 if (card->shutdown) {
1880 result = -ENODEV;
1881 break;
1882 }
1da177e4
LT		 1883 if (tout == 0) {
1884 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1885 result = -ESTRPIPE;
1886 else {
09e56df8
TI		 1887 dev_dbg(substream->pcm->card->dev,
1888 "playback drain error (DMA or IRQ trouble?)\n");
1da177e4
LT		 1889 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1890 result = -EIO;
1891 }
1892 break;
1893 }
1da177e4 1894 }
21cb2a2e 1895
4cdc115f 1896 unlock:
21cb2a2e 1897 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1898 up_read(&snd_pcm_link_rwsem);
1da177e4
LT		 1899
1900 return result;
1901}
1902
1903/*
1904 * drop ioctl
1905 *
1906 * Immediately put all linked substreams into SETUP state.
1907 */
877211f5 1908static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1909{
877211f5 1910 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1911 int result = 0;
1912
7eaa943c
TI		 1913 if (PCM_RUNTIME_CHECK(substream))
1914 return -ENXIO;
1da177e4 1915 runtime = substream->runtime;
1da177e4 1916
de1b8b93 1917 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
4b95ff78 1918 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1919 return -EBADFD;
1920
1da177e4
LT		 1921 snd_pcm_stream_lock_irq(substream);
1922 /* resume pause */
1923 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1924 snd_pcm_pause(substream, 0);
1925
1926 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1927 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1928 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1929
1da177e4
LT		 1930 return result;
1931}
1932
1933
0888c321 1934static bool is_pcm_file(struct file *file)
1da177e4 1935{
0888c321 1936 struct inode *inode = file_inode(file);
f87135f5
CL		 1937 unsigned int minor;
1938
0888c321
AV		 1939 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1940 return false;
1da177e4 1941 minor = iminor(inode);
0888c321
AV		 1942 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1943 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1da177e4
LT		 1944}
1945
1946/*
1947 * PCM link handling
1948 */
877211f5 1949static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1950{
1951 int res = 0;
877211f5
TI		 1952 struct snd_pcm_file *pcm_file;
1953 struct snd_pcm_substream *substream1;
1662591b 1954 struct snd_pcm_group *group;
0888c321 1955 struct fd f = fdget(fd);
1da177e4 1956
0888c321 1957 if (!f.file)
1da177e4 1958 return -EBADFD;
0888c321
AV		 1959 if (!is_pcm_file(f.file)) {
1960 res = -EBADFD;
1961 goto _badf;
1962 }
1963 pcm_file = f.file->private_data;
1da177e4 1964 substream1 = pcm_file->substream;
1662591b
TI		 1965 group = kmalloc(sizeof(*group), GFP_KERNEL);
1966 if (!group) {
1967 res = -ENOMEM;
1968 goto _nolock;
1969 }
67ec1072 1970 down_write_nonblock(&snd_pcm_link_rwsem);
1da177e4
LT		 1971 write_lock_irq(&snd_pcm_link_rwlock);
1972 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
257f8cce
TI		 1973 substream->runtime->status->state != substream1->runtime->status->state ||
1974 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1da177e4
LT		 1975 res = -EBADFD;
1976 goto _end;
1977 }
1978 if (snd_pcm_stream_linked(substream1)) {
1979 res = -EALREADY;
1980 goto _end;
1981 }
1982 if (!snd_pcm_stream_linked(substream)) {
1662591b 1983 substream->group = group;
dd6c5cd8 1984 group = NULL;
1da177e4 1985 spin_lock_init(&substream->group->lock);
257f8cce 1986 mutex_init(&substream->group->mutex);
1da177e4
LT		 1987 INIT_LIST_HEAD(&substream->group->substreams);
1988 list_add_tail(&substream->link_list, &substream->group->substreams);
1989 substream->group->count = 1;
1990 }
1991 list_add_tail(&substream1->link_list, &substream->group->substreams);
1992 substream->group->count++;
1993 substream1->group = substream->group;
1994 _end:
1995 write_unlock_irq(&snd_pcm_link_rwlock);
1996 up_write(&snd_pcm_link_rwsem);
1662591b 1997 _nolock:
a0830dbd 1998 snd_card_unref(substream1->pcm->card);
dd6c5cd8 1999 kfree(group);
0888c321
AV		 2000 _badf:
2001 fdput(f);
1da177e4
LT		 2002 return res;
2003}
2004
877211f5 2005static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 2006{
2007 substream->group = &substream->self_group;
2008 INIT_LIST_HEAD(&substream->self_group.substreams);
2009 list_add_tail(&substream->link_list, &substream->self_group.substreams);
2010}
2011
877211f5 2012static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 2013{
ef991b95 2014 struct snd_pcm_substream *s;
1da177e4
LT		 2015 int res = 0;
2016
67ec1072 2017 down_write_nonblock(&snd_pcm_link_rwsem);
1da177e4
LT		 2018 write_lock_irq(&snd_pcm_link_rwlock);
2019 if (!snd_pcm_stream_linked(substream)) {
2020 res = -EALREADY;
2021 goto _end;
2022 }
2023 list_del(&substream->link_list);
2024 substream->group->count--;
2025 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 2026 snd_pcm_group_for_each_entry(s, substream) {
2027 relink_to_local(s);
1da177e4
LT		 2028 break;
2029 }
2030 kfree(substream->group);
2031 }
2032 relink_to_local(substream);
2033 _end:
2034 write_unlock_irq(&snd_pcm_link_rwlock);
2035 up_write(&snd_pcm_link_rwsem);
2036 return res;
2037}
2038
2039/*
2040 * hw configurator
2041 */
877211f5
TI		 2042static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
2043 struct snd_pcm_hw_rule *rule)
1da177e4 2044{
877211f5 2045 struct snd_interval t;
1da177e4
LT		 2046 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
2047 hw_param_interval_c(params, rule->deps[1]), &t);
2048 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2049}
2050
877211f5
TI		 2051static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
2052 struct snd_pcm_hw_rule *rule)
1da177e4 2053{
877211f5 2054 struct snd_interval t;
1da177e4
LT		 2055 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
2056 hw_param_interval_c(params, rule->deps[1]), &t);
2057 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2058}
2059
877211f5
TI		 2060static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
2061 struct snd_pcm_hw_rule *rule)
1da177e4 2062{
877211f5 2063 struct snd_interval t;
1da177e4
LT		 2064 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
2065 hw_param_interval_c(params, rule->deps[1]),
2066 (unsigned long) rule->private, &t);
2067 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2068}
2069
877211f5
TI		 2070static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
2071 struct snd_pcm_hw_rule *rule)
1da177e4 2072{
877211f5 2073 struct snd_interval t;
1da177e4
LT		 2074 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
2075 (unsigned long) rule->private,
2076 hw_param_interval_c(params, rule->deps[1]), &t);
2077 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2078}
2079
877211f5
TI		 2080static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
2081 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 2082{
2083 unsigned int k;
b55f9fdc
TS		 2084 const struct snd_interval *i =
2085 hw_param_interval_c(params, rule->deps[0]);
877211f5
TI		 2086 struct snd_mask m;
2087 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 2088 snd_mask_any(&m);
2089 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2090 int bits;
2091 if (! snd_mask_test(mask, k))
2092 continue;
2093 bits = snd_pcm_format_physical_width(k);
2094 if (bits <= 0)
2095 continue; /* ignore invalid formats */
2096 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
2097 snd_mask_reset(&m, k);
2098 }
2099 return snd_mask_refine(mask, &m);
2100}
2101
877211f5
TI		 2102static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
2103 struct snd_pcm_hw_rule *rule)
1da177e4 2104{
877211f5 2105 struct snd_interval t;
1da177e4
LT		 2106 unsigned int k;
2107 t.min = UINT_MAX;
2108 t.max = 0;
2109 t.openmin = 0;
2110 t.openmax = 0;
2111 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2112 int bits;
2113 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
2114 continue;
2115 bits = snd_pcm_format_physical_width(k);
2116 if (bits <= 0)
2117 continue; /* ignore invalid formats */
2118 if (t.min > (unsigned)bits)
2119 t.min = bits;
2120 if (t.max < (unsigned)bits)
2121 t.max = bits;
2122 }
2123 t.integer = 1;
2124 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2125}
2126
2127#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
2128#error "Change this table"
2129#endif
2130
8b674308
TS		 2131static const unsigned int rates[] = {
2132 5512, 8000, 11025, 16000, 22050, 32000, 44100,
2133 48000, 64000, 88200, 96000, 176400, 192000
2134};
1da177e4 2135
7653d557
CL		 2136const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
2137 .count = ARRAY_SIZE(rates),
2138 .list = rates,
2139};
2140
877211f5
TI		 2141static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
2142 struct snd_pcm_hw_rule *rule)
1da177e4 2143{
877211f5 2144 struct snd_pcm_hardware *hw = rule->private;
1da177e4 2145 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 2146 snd_pcm_known_rates.count,
2147 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 2148}
2149
877211f5
TI		 2150static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2151 struct snd_pcm_hw_rule *rule)
1da177e4 2152{
877211f5
TI		 2153 struct snd_interval t;
2154 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 2155 t.min = 0;
2156 t.max = substream->buffer_bytes_max;
2157 t.openmin = 0;
2158 t.openmax = 0;
2159 t.integer = 1;
2160 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2161}
2162
877211f5 2163int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 2164{
877211f5
TI		 2165 struct snd_pcm_runtime *runtime = substream->runtime;
2166 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 2167 int k, err;
2168
2169 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2170 snd_mask_any(constrs_mask(constrs, k));
2171 }
2172
2173 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2174 snd_interval_any(constrs_interval(constrs, k));
2175 }
2176
2177 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2178 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2179 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2180 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2181 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2182
2183 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2184 snd_pcm_hw_rule_format, NULL,
2185 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2186 if (err < 0)
2187 return err;
2188 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2189 snd_pcm_hw_rule_sample_bits, NULL,
2190 SNDRV_PCM_HW_PARAM_FORMAT,
2191 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2192 if (err < 0)
2193 return err;
2194 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2195 snd_pcm_hw_rule_div, NULL,
2196 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2197 if (err < 0)
2198 return err;
2199 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2200 snd_pcm_hw_rule_mul, NULL,
2201 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2202 if (err < 0)
2203 return err;
2204 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2205 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2206 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2207 if (err < 0)
2208 return err;
2209 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2210 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2211 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2212 if (err < 0)
2213 return err;
2214 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2215 snd_pcm_hw_rule_div, NULL,
2216 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2217 if (err < 0)
2218 return err;
2219 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2220 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2221 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2222 if (err < 0)
2223 return err;
2224 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2225 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2226 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2227 if (err < 0)
2228 return err;
2229 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2230 snd_pcm_hw_rule_div, NULL,
2231 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2232 if (err < 0)
2233 return err;
2234 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2235 snd_pcm_hw_rule_div, NULL,
2236 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2237 if (err < 0)
2238 return err;
2239 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2240 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2241 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2242 if (err < 0)
2243 return err;
2244 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2245 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2246 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2247 if (err < 0)
2248 return err;
2249 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2250 snd_pcm_hw_rule_mul, NULL,
2251 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2252 if (err < 0)
2253 return err;
2254 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2255 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2256 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2257 if (err < 0)
2258 return err;
2259 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2260 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2261 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2262 if (err < 0)
2263 return err;
2264 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2265 snd_pcm_hw_rule_muldivk, (void*) 8,
2266 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2267 if (err < 0)
2268 return err;
2269 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2270 snd_pcm_hw_rule_muldivk, (void*) 8,
2271 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2272 if (err < 0)
2273 return err;
2274 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2275 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2276 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2277 if (err < 0)
2278 return err;
2279 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2280 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2281 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2282 if (err < 0)
2283 return err;
2284 return 0;
2285}
2286
877211f5 2287int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 2288{
877211f5
TI		 2289 struct snd_pcm_runtime *runtime = substream->runtime;
2290 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 2291 int err;
2292 unsigned int mask = 0;
2293
2294 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2295 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2296 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2297 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
63825f3a 2298 if (hw_support_mmap(substream)) {
1da177e4
LT		 2299 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2300 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2301 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2302 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2303 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2304 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2305 }
2306 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 2307 if (err < 0)
2308 return err;
1da177e4
LT		 2309
2310 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 2311 if (err < 0)
2312 return err;
1da177e4
LT		 2313
2314 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 2315 if (err < 0)
2316 return err;
1da177e4
LT		 2317
2318 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2319 hw->channels_min, hw->channels_max);
7eaa943c
TI		 2320 if (err < 0)
2321 return err;
1da177e4
LT		 2322
2323 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2324 hw->rate_min, hw->rate_max);
8b90ca08
GL		 2325 if (err < 0)
2326 return err;
1da177e4
LT		 2327
2328 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2329 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 2330 if (err < 0)
2331 return err;
1da177e4
LT		 2332
2333 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2334 hw->periods_min, hw->periods_max);
7eaa943c
TI		 2335 if (err < 0)
2336 return err;
1da177e4
LT		 2337
2338 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2339 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 2340 if (err < 0)
2341 return err;
1da177e4
LT		 2342
2343 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2344 snd_pcm_hw_rule_buffer_bytes_max, substream,
2345 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2346 if (err < 0)
2347 return err;
2348
2349 /* FIXME: remove */
2350 if (runtime->dma_bytes) {
2351 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c 2352 if (err < 0)
6cf95152 2353 return err;
1da177e4
LT		 2354 }
2355
2356 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2357 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2358 snd_pcm_hw_rule_rate, hw,
2359 SNDRV_PCM_HW_PARAM_RATE, -1);
2360 if (err < 0)
2361 return err;
2362 }
2363
2364 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2365 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2366
2367 return 0;
2368}
2369
3bf75f9b 2370static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2371{
1da177e4 2372 snd_pcm_unlink(substream);
3bf75f9b
TI		 2373}
2374
2375void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2376{
0df63e44
TI		 2377 substream->ref_count--;
2378 if (substream->ref_count > 0)
2379 return;
2380
3bf75f9b 2381 snd_pcm_drop(substream);
3bf75f9b 2382 if (substream->hw_opened) {
094435d4
TI		 2383 if (substream->ops->hw_free &&
2384 substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
1da177e4
LT		 2385 substream->ops->hw_free(substream);
2386 substream->ops->close(substream);
3bf75f9b 2387 substream->hw_opened = 0;
1da177e4 2388 }
8699a0b6
TI		 2389 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2390 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2391 if (substream->pcm_release) {
2392 substream->pcm_release(substream);
2393 substream->pcm_release = NULL;
2394 }
3bf75f9b
TI		 2395 snd_pcm_detach_substream(substream);
2396}
e88e8ae6
TI		 2397EXPORT_SYMBOL(snd_pcm_release_substream);
2398
3bf75f9b
TI		 2399int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2400 struct file *file,
2401 struct snd_pcm_substream **rsubstream)
2402{
2403 struct snd_pcm_substream *substream;
2404 int err;
2405
2406 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2407 if (err < 0)
2408 return err;
0df63e44
TI		 2409 if (substream->ref_count > 1) {
2410 *rsubstream = substream;
2411 return 0;
2412 }
2413
3bf75f9b
TI		 2414 err = snd_pcm_hw_constraints_init(substream);
2415 if (err < 0) {
09e56df8 2416 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
3bf75f9b
TI		 2417 goto error;
2418 }
2419
2420 if ((err = substream->ops->open(substream)) < 0)
2421 goto error;
2422
2423 substream->hw_opened = 1;
2424
2425 err = snd_pcm_hw_constraints_complete(substream);
2426 if (err < 0) {
09e56df8 2427 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
3bf75f9b
TI		 2428 goto error;
2429 }
2430
2431 *rsubstream = substream;
1da177e4 2432 return 0;
3bf75f9b
TI		 2433
2434 error:
2435 snd_pcm_release_substream(substream);
2436 return err;
1da177e4 2437}
e88e8ae6
TI		 2438EXPORT_SYMBOL(snd_pcm_open_substream);
2439
1da177e4 2440static int snd_pcm_open_file(struct file *file,
877211f5 2441 struct snd_pcm *pcm,
ffd3d5c6 2442 int stream)
1da177e4 2443{
877211f5
TI		 2444 struct snd_pcm_file *pcm_file;
2445 struct snd_pcm_substream *substream;
3bf75f9b 2446 int err;
1da177e4 2447
3bf75f9b
TI		 2448 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2449 if (err < 0)
2450 return err;
2451
548a648b
TI		 2452 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2453 if (pcm_file == NULL) {
2454 snd_pcm_release_substream(substream);
2455 return -ENOMEM;
2456 }
2457 pcm_file->substream = substream;
2458 if (substream->ref_count == 1) {
0df63e44
TI		 2459 substream->file = pcm_file;
2460 substream->pcm_release = pcm_release_private;
1da177e4 2461 }
1da177e4 2462 file->private_data = pcm_file;
ffd3d5c6 2463
1da177e4
LT		 2464 return 0;
2465}
2466
f87135f5
CL		 2467static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2468{
2469 struct snd_pcm *pcm;
02f4865f
TI		 2470 int err = nonseekable_open(inode, file);
2471 if (err < 0)
2472 return err;
f87135f5
CL		 2473 pcm = snd_lookup_minor_data(iminor(inode),
2474 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd 2475 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
8bb4d9ce
TI		 2476 if (pcm)
2477 snd_card_unref(pcm->card);
a0830dbd 2478 return err;
f87135f5
CL		 2479}
2480
2481static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2482{
877211f5 2483 struct snd_pcm *pcm;
02f4865f
TI		 2484 int err = nonseekable_open(inode, file);
2485 if (err < 0)
2486 return err;
f87135f5
CL		 2487 pcm = snd_lookup_minor_data(iminor(inode),
2488 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd 2489 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
8bb4d9ce
TI		 2490 if (pcm)
2491 snd_card_unref(pcm->card);
a0830dbd 2492 return err;
f87135f5
CL		 2493}
2494
2495static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2496{
2497 int err;
ac6424b9 2498 wait_queue_entry_t wait;
1da177e4 2499
1da177e4
LT		 2500 if (pcm == NULL) {
2501 err = -ENODEV;
2502 goto __error1;
2503 }
2504 err = snd_card_file_add(pcm->card, file);
2505 if (err < 0)
2506 goto __error1;
2507 if (!try_module_get(pcm->card->module)) {
2508 err = -EFAULT;
2509 goto __error2;
2510 }
2511 init_waitqueue_entry(&wait, current);
2512 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2513 mutex_lock(&pcm->open_mutex);
1da177e4 2514 while (1) {
ffd3d5c6 2515 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2516 if (err >= 0)
2517 break;
2518 if (err == -EAGAIN) {
2519 if (file->f_flags & O_NONBLOCK) {
2520 err = -EBUSY;
2521 break;
2522 }
2523 } else
2524 break;
2525 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2526 mutex_unlock(&pcm->open_mutex);
1da177e4 2527 schedule();
1a60d4c5 2528 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2529 if (pcm->card->shutdown) {
2530 err = -ENODEV;
2531 break;
2532 }
1da177e4
LT		 2533 if (signal_pending(current)) {
2534 err = -ERESTARTSYS;
2535 break;
2536 }
2537 }
2538 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2539 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2540 if (err < 0)
2541 goto __error;
2542 return err;
2543
2544 __error:
2545 module_put(pcm->card->module);
2546 __error2:
2547 snd_card_file_remove(pcm->card, file);
2548 __error1:
2549 return err;
2550}
2551
2552static int snd_pcm_release(struct inode *inode, struct file *file)
2553{
877211f5
TI		 2554 struct snd_pcm *pcm;
2555 struct snd_pcm_substream *substream;
2556 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2557
2558 pcm_file = file->private_data;
2559 substream = pcm_file->substream;
7eaa943c
TI		 2560 if (snd_BUG_ON(!substream))
2561 return -ENXIO;
1da177e4 2562 pcm = substream->pcm;
1a60d4c5 2563 mutex_lock(&pcm->open_mutex);
3bf75f9b 2564 snd_pcm_release_substream(substream);
548a648b 2565 kfree(pcm_file);
1a60d4c5 2566 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2567 wake_up(&pcm->open_wait);
2568 module_put(pcm->card->module);
2569 snd_card_file_remove(pcm->card, file);
2570 return 0;
2571}
2572
f839cc1c
TI		 2573/* check and update PCM state; return 0 or a negative error
2574 * call this inside PCM lock
2575 */
2576static int do_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2577{
f839cc1c 2578 switch (substream->runtime->status->state) {
1da177e4 2579 case SNDRV_PCM_STATE_DRAINING:
f839cc1c
TI		 2580 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2581 return -EBADFD;
1da177e4 2582 /* Fall through */
f839cc1c
TI		 2583 case SNDRV_PCM_STATE_RUNNING:
2584 return snd_pcm_update_hw_ptr(substream);
2585 case SNDRV_PCM_STATE_PREPARED:
2586 case SNDRV_PCM_STATE_PAUSED:
2587 return 0;
51840409 2588 case SNDRV_PCM_STATE_SUSPENDED:
f839cc1c
TI		 2589 return -ESTRPIPE;
2590 case SNDRV_PCM_STATE_XRUN:
2591 return -EPIPE;
1da177e4 2592 default:
f839cc1c 2593 return -EBADFD;
1da177e4 2594 }
f839cc1c 2595}
1da177e4 2596
9027c463 2597/* increase the appl_ptr; returns the processed frames or a negative error */
e0327a0f
TI		 2598static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
2599 snd_pcm_uframes_t frames,
2600 snd_pcm_sframes_t avail)
2601{
2602 struct snd_pcm_runtime *runtime = substream->runtime;
2603 snd_pcm_sframes_t appl_ptr;
9027c463 2604 int ret;
e0327a0f
TI		 2605
2606 if (avail <= 0)
2607 return 0;
2608 if (frames > (snd_pcm_uframes_t)avail)
2609 frames = avail;
2610 appl_ptr = runtime->control->appl_ptr + frames;
2611 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2612 appl_ptr -= runtime->boundary;
66e01a5c 2613 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
9027c463 2614 return ret < 0 ? ret : frames;
e0327a0f
TI		 2615}
2616
fb51f1cd 2617/* decrease the appl_ptr; returns the processed frames or zero for error */
e0327a0f
TI		 2618static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
2619 snd_pcm_uframes_t frames,
2620 snd_pcm_sframes_t avail)
2621{
2622 struct snd_pcm_runtime *runtime = substream->runtime;
2623 snd_pcm_sframes_t appl_ptr;
9027c463 2624 int ret;
e0327a0f
TI		 2625
2626 if (avail <= 0)
2627 return 0;
2628 if (frames > (snd_pcm_uframes_t)avail)
2629 frames = avail;
1da177e4
LT		 2630 appl_ptr = runtime->control->appl_ptr - frames;
2631 if (appl_ptr < 0)
2632 appl_ptr += runtime->boundary;
66e01a5c 2633 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
fb51f1cd
TI		 2634 /* NOTE: we return zero for errors because PulseAudio gets depressed
2635 * upon receiving an error from rewind ioctl and stops processing
2636 * any longer. Returning zero means that no rewind is done, so
2637 * it's not absolutely wrong to answer like that.
2638 */
2639 return ret < 0 ? 0 : frames;
e0327a0f
TI		 2640}
2641
763e5067
TI		 2642static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream,
2643 snd_pcm_uframes_t frames)
1da177e4 2644{
1da177e4 2645 snd_pcm_sframes_t ret;
1da177e4
LT		 2646
2647 if (frames == 0)
2648 return 0;
2649
2650 snd_pcm_stream_lock_irq(substream);
f839cc1c 2651 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2652 if (!ret)
2653 ret = rewind_appl_ptr(substream, frames,
763e5067 2654 snd_pcm_hw_avail(substream));
1da177e4
LT		 2655 snd_pcm_stream_unlock_irq(substream);
2656 return ret;
2657}
2658
763e5067
TI		 2659static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream,
2660 snd_pcm_uframes_t frames)
1da177e4 2661{
1da177e4 2662 snd_pcm_sframes_t ret;
1da177e4
LT		 2663
2664 if (frames == 0)
2665 return 0;
2666
2667 snd_pcm_stream_lock_irq(substream);
f839cc1c 2668 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2669 if (!ret)
2670 ret = forward_appl_ptr(substream, frames,
763e5067 2671 snd_pcm_avail(substream));
1da177e4
LT		 2672 snd_pcm_stream_unlock_irq(substream);
2673 return ret;
2674}
2675
877211f5 2676static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2677{
1da177e4
LT		 2678 int err;
2679
2680 snd_pcm_stream_lock_irq(substream);
f839cc1c 2681 err = do_pcm_hwsync(substream);
1da177e4
LT		 2682 snd_pcm_stream_unlock_irq(substream);
2683 return err;
2684}
2685
912e4c33
JM		 2686static int snd_pcm_delay(struct snd_pcm_substream *substream,
2687 snd_pcm_sframes_t *delay)
1da177e4 2688{
1da177e4
LT		 2689 int err;
2690 snd_pcm_sframes_t n = 0;
2691
2692 snd_pcm_stream_lock_irq(substream);
f839cc1c 2693 err = do_pcm_hwsync(substream);
c99c5a3b
TI		 2694 if (!err)
2695 n = snd_pcm_calc_delay(substream);
1da177e4 2696 snd_pcm_stream_unlock_irq(substream);
912e4c33
JM		 2697 if (!err)
2698 *delay = n;
2699 return err;
1da177e4
LT		 2700}
2701
877211f5
TI		 2702static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2703 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2704{
877211f5
TI		 2705 struct snd_pcm_runtime *runtime = substream->runtime;
2706 struct snd_pcm_sync_ptr sync_ptr;
2707 volatile struct snd_pcm_mmap_status *status;
2708 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2709 int err;
2710
2711 memset(&sync_ptr, 0, sizeof(sync_ptr));
2712 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2713 return -EFAULT;
877211f5 2714 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2715 return -EFAULT;
2716 status = runtime->status;
2717 control = runtime->control;
2718 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2719 err = snd_pcm_hwsync(substream);
2720 if (err < 0)
2721 return err;
2722 }
2723 snd_pcm_stream_lock_irq(substream);
9027c463 2724 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
66e01a5c
TS		 2725 err = pcm_lib_apply_appl_ptr(substream,
2726 sync_ptr.c.control.appl_ptr);
9027c463
TI		 2727 if (err < 0) {
2728 snd_pcm_stream_unlock_irq(substream);
2729 return err;
2730 }
2731 } else {
1da177e4 2732 sync_ptr.c.control.appl_ptr = control->appl_ptr;
9027c463 2733 }
1da177e4
LT		 2734 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2735 control->avail_min = sync_ptr.c.control.avail_min;
2736 else
2737 sync_ptr.c.control.avail_min = control->avail_min;
2738 sync_ptr.s.status.state = status->state;
2739 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2740 sync_ptr.s.status.tstamp = status->tstamp;
2741 sync_ptr.s.status.suspended_state = status->suspended_state;
f853dcaa 2742 sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
1da177e4
LT		 2743 snd_pcm_stream_unlock_irq(substream);
2744 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2745 return -EFAULT;
2746 return 0;
2747}
b751eef1
JK		 2748
2749static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2750{
2751 struct snd_pcm_runtime *runtime = substream->runtime;
2752 int arg;
2753
2754 if (get_user(arg, _arg))
2755 return -EFAULT;
2756 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2757 return -EINVAL;
2408c219 2758 runtime->tstamp_type = arg;
b751eef1
JK		 2759 return 0;
2760}
67616fed
TI		 2761
2762static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream,
2763 struct snd_xferi __user *_xferi)
2764{
2765 struct snd_xferi xferi;
2766 struct snd_pcm_runtime *runtime = substream->runtime;
2767 snd_pcm_sframes_t result;
2768
2769 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2770 return -EBADFD;
2771 if (put_user(0, &_xferi->result))
2772 return -EFAULT;
2773 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2774 return -EFAULT;
2775 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2776 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2777 else
2778 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2779 __put_user(result, &_xferi->result);
2780 return result < 0 ? result : 0;
2781}
2782
2783static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
2784 struct snd_xfern __user *_xfern)
2785{
2786 struct snd_xfern xfern;
2787 struct snd_pcm_runtime *runtime = substream->runtime;
2788 void *bufs;
2789 snd_pcm_sframes_t result;
2790
2791 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2792 return -EBADFD;
2793 if (runtime->channels > 128)
2794 return -EINVAL;
2795 if (put_user(0, &_xfern->result))
2796 return -EFAULT;
2797 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2798 return -EFAULT;
2799
2800 bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
2801 if (IS_ERR(bufs))
2802 return PTR_ERR(bufs);
2803 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2804 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2805 else
2806 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2807 kfree(bufs);
2808 __put_user(result, &_xfern->result);
2809 return result < 0 ? result : 0;
2810}
2811
2812static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream,
2813 snd_pcm_uframes_t __user *_frames)
2814{
2815 snd_pcm_uframes_t frames;
2816 snd_pcm_sframes_t result;
2817
2818 if (get_user(frames, _frames))
2819 return -EFAULT;
2820 if (put_user(0, _frames))
2821 return -EFAULT;
763e5067 2822 result = snd_pcm_rewind(substream, frames);
67616fed
TI		 2823 __put_user(result, _frames);
2824 return result < 0 ? result : 0;
2825}
2826
2827static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream,
2828 snd_pcm_uframes_t __user *_frames)
2829{
2830 snd_pcm_uframes_t frames;
2831 snd_pcm_sframes_t result;
2832
2833 if (get_user(frames, _frames))
2834 return -EFAULT;
2835 if (put_user(0, _frames))
2836 return -EFAULT;
763e5067 2837 result = snd_pcm_forward(substream, frames);
67616fed
TI		 2838 __put_user(result, _frames);
2839 return result < 0 ? result : 0;
2840}
2841
2842static int snd_pcm_common_ioctl(struct file *file,
0df63e44 2843 struct snd_pcm_substream *substream,
1da177e4
LT		 2844 unsigned int cmd, void __user *arg)
2845{
4b671f57 2846 struct snd_pcm_file *pcm_file = file->private_data;
7d8e8292
TI		 2847 int res;
2848
67616fed
TI		 2849 if (PCM_RUNTIME_CHECK(substream))
2850 return -ENXIO;
2851
7d8e8292
TI		 2852 res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0);
2853 if (res < 0)
2854 return res;
4b671f57 2855
1da177e4
LT		 2856 switch (cmd) {
2857 case SNDRV_PCM_IOCTL_PVERSION:
2858 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2859 case SNDRV_PCM_IOCTL_INFO:
2860 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2861 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2862 return 0;
b751eef1
JK		 2863 case SNDRV_PCM_IOCTL_TTSTAMP:
2864 return snd_pcm_tstamp(substream, arg);
4b671f57
TI		 2865 case SNDRV_PCM_IOCTL_USER_PVERSION:
2866 if (get_user(pcm_file->user_pversion,
2867 (unsigned int __user *)arg))
2868 return -EFAULT;
2869 return 0;
1da177e4
LT		 2870 case SNDRV_PCM_IOCTL_HW_REFINE:
2871 return snd_pcm_hw_refine_user(substream, arg);
2872 case SNDRV_PCM_IOCTL_HW_PARAMS:
2873 return snd_pcm_hw_params_user(substream, arg);
2874 case SNDRV_PCM_IOCTL_HW_FREE:
2875 return snd_pcm_hw_free(substream);
2876 case SNDRV_PCM_IOCTL_SW_PARAMS:
2877 return snd_pcm_sw_params_user(substream, arg);
2878 case SNDRV_PCM_IOCTL_STATUS:
38ca2a4d
PLB		 2879 return snd_pcm_status_user(substream, arg, false);
2880 case SNDRV_PCM_IOCTL_STATUS_EXT:
2881 return snd_pcm_status_user(substream, arg, true);
1da177e4
LT		 2882 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2883 return snd_pcm_channel_info_user(substream, arg);
2884 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2885 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2886 case SNDRV_PCM_IOCTL_RESET:
2887 return snd_pcm_reset(substream);
2888 case SNDRV_PCM_IOCTL_START:
c2c86a97 2889 return snd_pcm_start_lock_irq(substream);
1da177e4
LT		 2890 case SNDRV_PCM_IOCTL_LINK:
2891 return snd_pcm_link(substream, (int)(unsigned long) arg);
2892 case SNDRV_PCM_IOCTL_UNLINK:
2893 return snd_pcm_unlink(substream);
2894 case SNDRV_PCM_IOCTL_RESUME:
2895 return snd_pcm_resume(substream);
2896 case SNDRV_PCM_IOCTL_XRUN:
2897 return snd_pcm_xrun(substream);
2898 case SNDRV_PCM_IOCTL_HWSYNC:
2899 return snd_pcm_hwsync(substream);
2900 case SNDRV_PCM_IOCTL_DELAY:
c2c86a97 2901 {
912e4c33 2902 snd_pcm_sframes_t delay;
c2c86a97 2903 snd_pcm_sframes_t __user *res = arg;
912e4c33 2904 int err;
c2c86a97 2905
912e4c33
JM		 2906 err = snd_pcm_delay(substream, &delay);
2907 if (err)
2908 return err;
c2c86a97
TI		 2909 if (put_user(delay, res))
2910 return -EFAULT;
2911 return 0;
2912 }
1da177e4
LT		 2913 case SNDRV_PCM_IOCTL_SYNC_PTR:
2914 return snd_pcm_sync_ptr(substream, arg);
59d48582 2915#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2916 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2917 return snd_pcm_hw_refine_old_user(substream, arg);
2918 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2919 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2920#endif
1da177e4 2921 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2922 return snd_pcm_drain(substream, file);
1da177e4
LT		 2923 case SNDRV_PCM_IOCTL_DROP:
2924 return snd_pcm_drop(substream);
e661d0dd 2925 case SNDRV_PCM_IOCTL_PAUSE:
34bcc44a
TI		 2926 return snd_pcm_action_lock_irq(&snd_pcm_action_pause,
2927 substream,
2928 (int)(unsigned long)arg);
1da177e4 2929 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
1da177e4 2930 case SNDRV_PCM_IOCTL_READI_FRAMES:
67616fed
TI		 2931 return snd_pcm_xferi_frames_ioctl(substream, arg);
2932 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
1da177e4 2933 case SNDRV_PCM_IOCTL_READN_FRAMES:
67616fed 2934 return snd_pcm_xfern_frames_ioctl(substream, arg);
1da177e4 2935 case SNDRV_PCM_IOCTL_REWIND:
67616fed 2936 return snd_pcm_rewind_ioctl(substream, arg);
1da177e4 2937 case SNDRV_PCM_IOCTL_FORWARD:
67616fed 2938 return snd_pcm_forward_ioctl(substream, arg);
1da177e4 2939 }
67616fed
TI		 2940 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2941 return -ENOTTY;
1da177e4
LT		 2942}
2943
67616fed
TI		 2944static long snd_pcm_ioctl(struct file *file, unsigned int cmd,
2945 unsigned long arg)
1da177e4 2946{
877211f5 2947 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2948
2949 pcm_file = file->private_data;
2950
2951 if (((cmd >> 8) & 0xff) != 'A')
2952 return -ENOTTY;
2953
67616fed
TI		 2954 return snd_pcm_common_ioctl(file, pcm_file->substream, cmd,
2955 (void __user *)arg);
1da177e4
LT		 2956}
2957
c2c86a97
TI		 2958/**
2959 * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space
2960 * @substream: PCM substream
2961 * @cmd: IOCTL cmd
2962 * @arg: IOCTL argument
2963 *
2964 * The function is provided primarily for OSS layer and USB gadget drivers,
2965 * and it allows only the limited set of ioctls (hw_params, sw_params,
2966 * prepare, start, drain, drop, forward).
2967 */
bf1bbb5a
TI		 2968int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2969 unsigned int cmd, void *arg)
1da177e4 2970{
c2c86a97
TI		 2971 snd_pcm_uframes_t *frames = arg;
2972 snd_pcm_sframes_t result;
1da177e4 2973
c2c86a97
TI		 2974 switch (cmd) {
2975 case SNDRV_PCM_IOCTL_FORWARD:
2976 {
2977 /* provided only for OSS; capture-only and no value returned */
2978 if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
2979 return -EINVAL;
763e5067 2980 result = snd_pcm_forward(substream, *frames);
c2c86a97
TI		 2981 return result < 0 ? result : 0;
2982 }
2983 case SNDRV_PCM_IOCTL_HW_PARAMS:
2984 return snd_pcm_hw_params(substream, arg);
2985 case SNDRV_PCM_IOCTL_SW_PARAMS:
2986 return snd_pcm_sw_params(substream, arg);
2987 case SNDRV_PCM_IOCTL_PREPARE:
2988 return snd_pcm_prepare(substream, NULL);
2989 case SNDRV_PCM_IOCTL_START:
2990 return snd_pcm_start_lock_irq(substream);
2991 case SNDRV_PCM_IOCTL_DRAIN:
7d8e8292 2992 return snd_pcm_drain(substream, NULL);
c2c86a97
TI		 2993 case SNDRV_PCM_IOCTL_DROP:
2994 return snd_pcm_drop(substream);
2995 case SNDRV_PCM_IOCTL_DELAY:
912e4c33 2996 return snd_pcm_delay(substream, frames);
1da177e4 2997 default:
c2c86a97 2998 return -EINVAL;
1da177e4
LT		 2999 }
3000}
e88e8ae6
TI		 3001EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3002
877211f5
TI		 3003static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3004 loff_t * offset)
1da177e4 3005{
877211f5
TI		 3006 struct snd_pcm_file *pcm_file;
3007 struct snd_pcm_substream *substream;
3008 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3009 snd_pcm_sframes_t result;
3010
3011 pcm_file = file->private_data;
3012 substream = pcm_file->substream;
7eaa943c
TI		 3013 if (PCM_RUNTIME_CHECK(substream))
3014 return -ENXIO;
1da177e4
LT		 3015 runtime = substream->runtime;
3016 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3017 return -EBADFD;
3018 if (!frame_aligned(runtime, count))
3019 return -EINVAL;
3020 count = bytes_to_frames(runtime, count);
3021 result = snd_pcm_lib_read(substream, buf, count);
3022 if (result > 0)
3023 result = frames_to_bytes(runtime, result);
3024 return result;
3025}
3026
877211f5
TI		 3027static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3028 size_t count, loff_t * offset)
1da177e4 3029{
877211f5
TI		 3030 struct snd_pcm_file *pcm_file;
3031 struct snd_pcm_substream *substream;
3032 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3033 snd_pcm_sframes_t result;
3034
3035 pcm_file = file->private_data;
3036 substream = pcm_file->substream;
7eaa943c
TI		 3037 if (PCM_RUNTIME_CHECK(substream))
3038 return -ENXIO;
1da177e4 3039 runtime = substream->runtime;
7eaa943c
TI		 3040 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3041 return -EBADFD;
3042 if (!frame_aligned(runtime, count))
3043 return -EINVAL;
1da177e4
LT		 3044 count = bytes_to_frames(runtime, count);
3045 result = snd_pcm_lib_write(substream, buf, count);
3046 if (result > 0)
3047 result = frames_to_bytes(runtime, result);
1da177e4
LT		 3048 return result;
3049}
3050
1c65d986 3051static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
1da177e4 3052{
877211f5
TI		 3053 struct snd_pcm_file *pcm_file;
3054 struct snd_pcm_substream *substream;
3055 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3056 snd_pcm_sframes_t result;
3057 unsigned long i;
3058 void __user **bufs;
3059 snd_pcm_uframes_t frames;
3060
ee0b3e67 3061 pcm_file = iocb->ki_filp->private_data;
1da177e4 3062 substream = pcm_file->substream;
7eaa943c
TI		 3063 if (PCM_RUNTIME_CHECK(substream))
3064 return -ENXIO;
1da177e4
LT		 3065 runtime = substream->runtime;
3066 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3067 return -EBADFD;
1c65d986
AV		 3068 if (!iter_is_iovec(to))
3069 return -EINVAL;
3070 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
1da177e4 3071 return -EINVAL;
1c65d986 3072 if (!frame_aligned(runtime, to->iov->iov_len))
1da177e4 3073 return -EINVAL;
1c65d986 3074 frames = bytes_to_samples(runtime, to->iov->iov_len);
6da2ec56 3075 bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL);
1da177e4
LT		 3076 if (bufs == NULL)
3077 return -ENOMEM;
1c65d986
AV		 3078 for (i = 0; i < to->nr_segs; ++i)
3079 bufs[i] = to->iov[i].iov_base;
1da177e4
LT		 3080 result = snd_pcm_lib_readv(substream, bufs, frames);
3081 if (result > 0)
3082 result = frames_to_bytes(runtime, result);
3083 kfree(bufs);
3084 return result;
3085}
3086
1c65d986 3087static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
1da177e4 3088{
877211f5
TI		 3089 struct snd_pcm_file *pcm_file;
3090 struct snd_pcm_substream *substream;
3091 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3092 snd_pcm_sframes_t result;
3093 unsigned long i;
3094 void __user **bufs;
3095 snd_pcm_uframes_t frames;
3096
ee0b3e67 3097 pcm_file = iocb->ki_filp->private_data;
1da177e4 3098 substream = pcm_file->substream;
7eaa943c
TI		 3099 if (PCM_RUNTIME_CHECK(substream))
3100 return -ENXIO;
1da177e4 3101 runtime = substream->runtime;
7eaa943c
TI		 3102 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3103 return -EBADFD;
1c65d986
AV		 3104 if (!iter_is_iovec(from))
3105 return -EINVAL;
3106 if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
3107 !frame_aligned(runtime, from->iov->iov_len))
7eaa943c 3108 return -EINVAL;
1c65d986 3109 frames = bytes_to_samples(runtime, from->iov->iov_len);
6da2ec56 3110 bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL);
1da177e4
LT		 3111 if (bufs == NULL)
3112 return -ENOMEM;
1c65d986
AV		 3113 for (i = 0; i < from->nr_segs; ++i)
3114 bufs[i] = from->iov[i].iov_base;
1da177e4
LT		 3115 result = snd_pcm_lib_writev(substream, bufs, frames);
3116 if (result > 0)
3117 result = frames_to_bytes(runtime, result);
3118 kfree(bufs);
1da177e4
LT		 3119 return result;
3120}
3121
6448fcba 3122static __poll_t snd_pcm_poll(struct file *file, poll_table *wait)
1da177e4 3123{
877211f5
TI		 3124 struct snd_pcm_file *pcm_file;
3125 struct snd_pcm_substream *substream;
3126 struct snd_pcm_runtime *runtime;
6448fcba 3127 __poll_t mask, ok;
1da177e4
LT		 3128 snd_pcm_uframes_t avail;
3129
3130 pcm_file = file->private_data;
3131
3132 substream = pcm_file->substream;
6448fcba
TI		 3133 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3134 ok = EPOLLOUT | EPOLLWRNORM;
3135 else
3136 ok = EPOLLIN | EPOLLRDNORM;
7eaa943c 3137 if (PCM_RUNTIME_CHECK(substream))
6448fcba 3138 return ok | EPOLLERR;
1da177e4 3139
1da177e4 3140 runtime = substream->runtime;
1da177e4
LT		 3141 poll_wait(file, &runtime->sleep, wait);
3142
6448fcba 3143 mask = 0;
1da177e4 3144 snd_pcm_stream_lock_irq(substream);
6448fcba 3145 avail = snd_pcm_avail(substream);
1da177e4
LT		 3146 switch (runtime->status->state) {
3147 case SNDRV_PCM_STATE_RUNNING:
3148 case SNDRV_PCM_STATE_PREPARED:
3149 case SNDRV_PCM_STATE_PAUSED:
6448fcba
TI		 3150 if (avail >= runtime->control->avail_min)
3151 mask = ok;
1da177e4
LT		 3152 break;
3153 case SNDRV_PCM_STATE_DRAINING:
6448fcba
TI		 3154 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
3155 mask = ok;
3156 if (!avail)
3157 mask |= EPOLLERR;
1da177e4 3158 }
6448fcba 3159 break;
1da177e4 3160 default:
6448fcba 3161 mask = ok | EPOLLERR;
1da177e4
LT		 3162 break;
3163 }
3164 snd_pcm_stream_unlock_irq(substream);
3165 return mask;
3166}
3167
3168/*
3169 * mmap support
3170 */
3171
3172/*
3173 * Only on coherent architectures, we can mmap the status and the control records
3174 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3175 */
3176#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3177/*
3178 * mmap status record
3179 */
41412fe9 3180static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf)
1da177e4 3181{
11bac800 3182 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3183 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3184
3185 if (substream == NULL)
3ad5afcd 3186 return VM_FAULT_SIGBUS;
1da177e4 3187 runtime = substream->runtime;
3ad5afcd
NP		 3188 vmf->page = virt_to_page(runtime->status);
3189 get_page(vmf->page);
3190 return 0;
1da177e4
LT		 3191}
3192
f0f37e2f 3193static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3194{
3ad5afcd 3195 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3196};
3197
877211f5 3198static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3199 struct vm_area_struct *area)
3200{
1da177e4
LT		 3201 long size;
3202 if (!(area->vm_flags & VM_READ))
3203 return -EINVAL;
1da177e4 3204 size = area->vm_end - area->vm_start;
877211f5 3205 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3206 return -EINVAL;
3207 area->vm_ops = &snd_pcm_vm_ops_status;
3208 area->vm_private_data = substream;
314e51b9 3209 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3210 return 0;
3211}
3212
3213/*
3214 * mmap control record
3215 */
41412fe9 3216static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf)
1da177e4 3217{
11bac800 3218 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3219 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3220
3221 if (substream == NULL)
3ad5afcd 3222 return VM_FAULT_SIGBUS;
1da177e4 3223 runtime = substream->runtime;
3ad5afcd
NP		 3224 vmf->page = virt_to_page(runtime->control);
3225 get_page(vmf->page);
3226 return 0;
1da177e4
LT		 3227}
3228
f0f37e2f 3229static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3230{
3ad5afcd 3231 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3232};
3233
877211f5 3234static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3235 struct vm_area_struct *area)
3236{
1da177e4
LT		 3237 long size;
3238 if (!(area->vm_flags & VM_READ))
3239 return -EINVAL;
1da177e4 3240 size = area->vm_end - area->vm_start;
877211f5 3241 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3242 return -EINVAL;
3243 area->vm_ops = &snd_pcm_vm_ops_control;
3244 area->vm_private_data = substream;
314e51b9 3245 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3246 return 0;
3247}
42f94597
TI		 3248
3249static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
3250{
3251 if (pcm_file->no_compat_mmap)
3252 return false;
b602aa8e
TI		 3253 /* See pcm_control_mmap_allowed() below.
3254 * Since older alsa-lib requires both status and control mmaps to be
3255 * coupled, we have to disable the status mmap for old alsa-lib, too.
3256 */
3257 if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) &&
3258 (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR))
3259 return false;
3260 return true;
3261}
3262
3263static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
3264{
3265 if (pcm_file->no_compat_mmap)
3266 return false;
3267 /* Disallow the control mmap when SYNC_APPLPTR flag is set;
42f94597
TI		 3268 * it enforces the user-space to fall back to snd_pcm_sync_ptr(),
3269 * thus it effectively assures the manual update of appl_ptr.
42f94597
TI		 3270 */
3271 if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)
3272 return false;
3273 return true;
3274}
3275
1da177e4
LT		 3276#else /* ! coherent mmap */
3277/*
3278 * don't support mmap for status and control records.
3279 */
42f94597 3280#define pcm_status_mmap_allowed(pcm_file) false
b602aa8e 3281#define pcm_control_mmap_allowed(pcm_file) false
42f94597 3282
877211f5 3283static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3284 struct vm_area_struct *area)
3285{
3286 return -ENXIO;
3287}
877211f5 3288static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3289 struct vm_area_struct *area)
3290{
3291 return -ENXIO;
3292}
3293#endif /* coherent mmap */
3294
9eb4a067
TI		 3295static inline struct page *
3296snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3297{
3298 void *vaddr = substream->runtime->dma_area + ofs;
3299 return virt_to_page(vaddr);
3300}
3301
1da177e4 3302/*
3ad5afcd 3303 * fault callback for mmapping a RAM page
1da177e4 3304 */
41412fe9 3305static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf)
1da177e4 3306{
11bac800 3307 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3308 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3309 unsigned long offset;
3310 struct page * page;
1da177e4
LT		 3311 size_t dma_bytes;
3312
3313 if (substream == NULL)
3ad5afcd 3314 return VM_FAULT_SIGBUS;
1da177e4 3315 runtime = substream->runtime;
3ad5afcd 3316 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3317 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3318 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3319 return VM_FAULT_SIGBUS;
9eb4a067 3320 if (substream->ops->page)
1da177e4 3321 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3322 else
3323 page = snd_pcm_default_page_ops(substream, offset);
3324 if (!page)
3325 return VM_FAULT_SIGBUS;
b5810039 3326 get_page(page);
3ad5afcd
NP		 3327 vmf->page = page;
3328 return 0;
1da177e4
LT		 3329}
3330
657b1989
TI		 3331static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3332 .open = snd_pcm_mmap_data_open,
3333 .close = snd_pcm_mmap_data_close,
3334};
3335
3336static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3337 .open = snd_pcm_mmap_data_open,
3338 .close = snd_pcm_mmap_data_close,
3ad5afcd 3339 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3340};
3341
3342/*
3343 * mmap the DMA buffer on RAM
3344 */
30b771cf
TI		 3345
3346/**
3347 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3348 * @substream: PCM substream
3349 * @area: VMA
3350 *
3351 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3352 * this function is invoked implicitly.
3353 */
18a2b962
TI		 3354int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3355 struct vm_area_struct *area)
1da177e4 3356{
314e51b9 3357 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
a5606f85 3358#ifdef CONFIG_GENERIC_ALLOCATOR
05503214
NC		 3359 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3360 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3361 return remap_pfn_range(area, area->vm_start,
3362 substream->dma_buffer.addr >> PAGE_SHIFT,
3363 area->vm_end - area->vm_start, area->vm_page_prot);
3364 }
a5606f85 3365#endif /* CONFIG_GENERIC_ALLOCATOR */
49d776ff 3366#ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
abe594c2 3367 if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page &&
657b1989
TI		 3368 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3369 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3370 area,
3371 substream->runtime->dma_area,
3372 substream->runtime->dma_addr,
9066ae7f 3373 substream->runtime->dma_bytes);
49d776ff 3374#endif /* CONFIG_X86 */
657b1989
TI		 3375 /* mmap with fault handler */
3376 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3377 return 0;
3378}
18a2b962 3379EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3380
3381/*
3382 * mmap the DMA buffer on I/O memory area
3383 */
3384#if SNDRV_PCM_INFO_MMAP_IOMEM
30b771cf
TI		 3385/**
3386 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3387 * @substream: PCM substream
3388 * @area: VMA
3389 *
3390 * When your hardware uses the iomapped pages as the hardware buffer and
3391 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3392 * is supposed to work only on limited architectures.
3393 */
877211f5
TI		 3394int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3395 struct vm_area_struct *area)
1da177e4 3396{
3c7f6919 3397 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 3398
1da177e4 3399 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
0fe09a45 3400 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
1da177e4 3401}
e88e8ae6 3402EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3403#endif /* SNDRV_PCM_INFO_MMAP */
3404
3405/*
3406 * mmap DMA buffer
3407 */
877211f5 3408int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3409 struct vm_area_struct *area)
3410{
877211f5 3411 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3412 long size;
3413 unsigned long offset;
3414 size_t dma_bytes;
657b1989 3415 int err;
1da177e4
LT		 3416
3417 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3418 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3419 return -EINVAL;
3420 } else {
3421 if (!(area->vm_flags & VM_READ))
3422 return -EINVAL;
3423 }
3424 runtime = substream->runtime;
1da177e4
LT		 3425 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3426 return -EBADFD;
3427 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3428 return -ENXIO;
3429 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3430 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3431 return -EINVAL;
3432 size = area->vm_end - area->vm_start;
3433 offset = area->vm_pgoff << PAGE_SHIFT;
3434 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3435 if ((size_t)size > dma_bytes)
3436 return -EINVAL;
3437 if (offset > dma_bytes - size)
3438 return -EINVAL;
3439
657b1989
TI		 3440 area->vm_ops = &snd_pcm_vm_ops_data;
3441 area->vm_private_data = substream;
1da177e4 3442 if (substream->ops->mmap)
657b1989 3443 err = substream->ops->mmap(substream, area);
1da177e4 3444 else
18a2b962 3445 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3446 if (!err)
3447 atomic_inc(&substream->mmap_count);
3448 return err;
1da177e4 3449}
e88e8ae6
TI		 3450EXPORT_SYMBOL(snd_pcm_mmap_data);
3451
1da177e4
LT		 3452static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3453{
877211f5
TI		 3454 struct snd_pcm_file * pcm_file;
3455 struct snd_pcm_substream *substream;
1da177e4
LT		 3456 unsigned long offset;
3457
3458 pcm_file = file->private_data;
3459 substream = pcm_file->substream;
7eaa943c
TI		 3460 if (PCM_RUNTIME_CHECK(substream))
3461 return -ENXIO;
1da177e4
LT		 3462
3463 offset = area->vm_pgoff << PAGE_SHIFT;
3464 switch (offset) {
3465 case SNDRV_PCM_MMAP_OFFSET_STATUS:
42f94597 3466 if (!pcm_status_mmap_allowed(pcm_file))
1da177e4
LT		 3467 return -ENXIO;
3468 return snd_pcm_mmap_status(substream, file, area);
3469 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
b602aa8e 3470 if (!pcm_control_mmap_allowed(pcm_file))
1da177e4
LT		 3471 return -ENXIO;
3472 return snd_pcm_mmap_control(substream, file, area);
3473 default:
3474 return snd_pcm_mmap_data(substream, file, area);
3475 }
3476 return 0;
3477}
3478
3479static int snd_pcm_fasync(int fd, struct file * file, int on)
3480{
877211f5
TI		 3481 struct snd_pcm_file * pcm_file;
3482 struct snd_pcm_substream *substream;
3483 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3484
3485 pcm_file = file->private_data;
3486 substream = pcm_file->substream;
7eaa943c 3487 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3488 return -ENXIO;
1da177e4 3489 runtime = substream->runtime;
d05468b7 3490 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3491}
3492
3493/*
3494 * ioctl32 compat
3495 */
3496#ifdef CONFIG_COMPAT
3497#include "pcm_compat.c"
3498#else
3499#define snd_pcm_ioctl_compat NULL
3500#endif
3501
3502/*
3503 * To be removed helpers to keep binary compatibility
3504 */
3505
59d48582 3506#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3507#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3508#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3509
877211f5
TI		 3510static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3511 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3512{
3513 unsigned int i;
3514
3515 memset(params, 0, sizeof(*params));
3516 params->flags = oparams->flags;
3517 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3518 params->masks[i].bits[0] = oparams->masks[i];
3519 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3520 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3521 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3522 params->info = oparams->info;
3523 params->msbits = oparams->msbits;
3524 params->rate_num = oparams->rate_num;
3525 params->rate_den = oparams->rate_den;
3526 params->fifo_size = oparams->fifo_size;
3527}
3528
877211f5
TI		 3529static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3530 struct snd_pcm_hw_params *params)
1da177e4
LT		 3531{
3532 unsigned int i;
3533
3534 memset(oparams, 0, sizeof(*oparams));
3535 oparams->flags = params->flags;
3536 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3537 oparams->masks[i] = params->masks[i].bits[0];
3538 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3539 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3540 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3541 oparams->info = params->info;
3542 oparams->msbits = params->msbits;
3543 oparams->rate_num = params->rate_num;
3544 oparams->rate_den = params->rate_den;
3545 oparams->fifo_size = params->fifo_size;
3546}
3547
877211f5
TI		 3548static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3549 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3550{
877211f5
TI		 3551 struct snd_pcm_hw_params *params;
3552 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3553 int err;
3554
3555 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3556 if (!params)
3557 return -ENOMEM;
1da177e4 3558
ef44a1ec
LZ		 3559 oparams = memdup_user(_oparams, sizeof(*oparams));
3560 if (IS_ERR(oparams)) {
3561 err = PTR_ERR(oparams);
1da177e4
LT		 3562 goto out;
3563 }
3564 snd_pcm_hw_convert_from_old_params(params, oparams);
3565 err = snd_pcm_hw_refine(substream, params);
f74ae15f
TS		 3566 if (err < 0)
3567 goto out_old;
ef44a1ec 3568
f74ae15f
TS		 3569 err = fixup_unreferenced_params(substream, params);
3570 if (err < 0)
3571 goto out_old;
ef44a1ec 3572
f74ae15f
TS		 3573 snd_pcm_hw_convert_to_old_params(oparams, params);
3574 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3575 err = -EFAULT;
3576out_old:
ef44a1ec 3577 kfree(oparams);
1da177e4
LT		 3578out:
3579 kfree(params);
1da177e4
LT		 3580 return err;
3581}
3582
877211f5
TI		 3583static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3584 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3585{
877211f5
TI		 3586 struct snd_pcm_hw_params *params;
3587 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3588 int err;
3589
3590 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3591 if (!params)
3592 return -ENOMEM;
3593
3594 oparams = memdup_user(_oparams, sizeof(*oparams));
3595 if (IS_ERR(oparams)) {
3596 err = PTR_ERR(oparams);
1da177e4
LT		 3597 goto out;
3598 }
f74ae15f 3599
1da177e4
LT		 3600 snd_pcm_hw_convert_from_old_params(params, oparams);
3601 err = snd_pcm_hw_params(substream, params);
f74ae15f
TS		 3602 if (err < 0)
3603 goto out_old;
ef44a1ec 3604
f74ae15f
TS		 3605 snd_pcm_hw_convert_to_old_params(oparams, params);
3606 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3607 err = -EFAULT;
3608out_old:
ef44a1ec 3609 kfree(oparams);
1da177e4
LT		 3610out:
3611 kfree(params);
1da177e4
LT		 3612 return err;
3613}
59d48582 3614#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3615
7003609b 3616#ifndef CONFIG_MMU
55c63bd2
DG		 3617static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3618 unsigned long addr,
3619 unsigned long len,
3620 unsigned long pgoff,
3621 unsigned long flags)
3622{
3623 struct snd_pcm_file *pcm_file = file->private_data;
3624 struct snd_pcm_substream *substream = pcm_file->substream;
3625 struct snd_pcm_runtime *runtime = substream->runtime;
3626 unsigned long offset = pgoff << PAGE_SHIFT;
3627
3628 switch (offset) {
3629 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3630 return (unsigned long)runtime->status;
3631 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3632 return (unsigned long)runtime->control;
3633 default:
3634 return (unsigned long)runtime->dma_area + offset;
3635 }
7003609b
CC		 3636}
3637#else
55c63bd2 3638# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3639#endif
3640
1da177e4
LT		 3641/*
3642 * Register section
3643 */
3644
9c2e08c5 3645const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3646 {
2af677fc
CL		 3647 .owner = THIS_MODULE,
3648 .write = snd_pcm_write,
1c65d986 3649 .write_iter = snd_pcm_writev,
f87135f5 3650 .open = snd_pcm_playback_open,
2af677fc 3651 .release = snd_pcm_release,
02f4865f 3652 .llseek = no_llseek,
6448fcba 3653 .poll = snd_pcm_poll,
67616fed 3654 .unlocked_ioctl = snd_pcm_ioctl,
2af677fc
CL		 3655 .compat_ioctl = snd_pcm_ioctl_compat,
3656 .mmap = snd_pcm_mmap,
3657 .fasync = snd_pcm_fasync,
55c63bd2 3658 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3659 },
3660 {
2af677fc
CL		 3661 .owner = THIS_MODULE,
3662 .read = snd_pcm_read,
1c65d986 3663 .read_iter = snd_pcm_readv,
f87135f5 3664 .open = snd_pcm_capture_open,
2af677fc 3665 .release = snd_pcm_release,
02f4865f 3666 .llseek = no_llseek,
6448fcba 3667 .poll = snd_pcm_poll,
67616fed 3668 .unlocked_ioctl = snd_pcm_ioctl,
2af677fc
CL		 3669 .compat_ioctl = snd_pcm_ioctl_compat,
3670 .mmap = snd_pcm_mmap,
3671 .fasync = snd_pcm_fasync,
55c63bd2 3672 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3673 }
3674};
Linux 6.x block layer and io_uring tree(s)