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ALSA: pcm: Avoid confusing loop in snd_pcm_unlink()
[linux.git] / sound / core / pcm_native.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <[email protected]>
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>
b888a5f7 39#include <linux/delay.h>
1da177e4 40
2c4842d3
TS		 41#include "pcm_local.h"
42
37567c55 43#ifdef CONFIG_SND_DEBUG
be4e31da
TS		 44#define CREATE_TRACE_POINTS
45#include "pcm_param_trace.h"
37567c55
TS		 46#else
47#define trace_hw_mask_param_enabled() 0
48#define trace_hw_interval_param_enabled() 0
49#define trace_hw_mask_param(substream, type, index, prev, curr)
50#define trace_hw_interval_param(substream, type, index, prev, curr)
51#endif
be4e31da 52
1da177e4
LT		 53/*
54 * Compatibility
55 */
56
877211f5 57struct snd_pcm_hw_params_old {
1da177e4
LT		 58 unsigned int flags;
59 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
60 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 61 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 62 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
63 unsigned int rmask;
64 unsigned int cmask;
65 unsigned int info;
66 unsigned int msbits;
67 unsigned int rate_num;
68 unsigned int rate_den;
877211f5 69 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 70 unsigned char reserved[64];
71};
72
59d48582 73#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 74#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
75#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 76
877211f5
TI		 77static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
78 struct snd_pcm_hw_params_old __user * _oparams);
79static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
80 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 81#endif
f87135f5 82static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 83
84/*
85 *
86 */
87
7af142f7
TI		 88static DEFINE_RWLOCK(snd_pcm_link_rwlock);
89static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4 90
67ec1072
TI		 91/* Writer in rwsem may block readers even during its waiting in queue,
92 * and this may lead to a deadlock when the code path takes read sem
93 * twice (e.g. one in snd_pcm_action_nonatomic() and another in
94 * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to
b888a5f7 95 * sleep until all the readers are completed without blocking by writer.
67ec1072 96 */
b888a5f7 97static inline void down_write_nonfifo(struct rw_semaphore *lock)
67ec1072
TI		 98{
99 while (!down_write_trylock(lock))
b888a5f7 100 msleep(1);
67ec1072
TI		 101}
102
73365cb1
TI		 103void snd_pcm_group_init(struct snd_pcm_group *group)
104{
105 spin_lock_init(&group->lock);
106 mutex_init(&group->mutex);
107 INIT_LIST_HEAD(&group->substreams);
108}
109
10aa7cad
AMG		 110#define PCM_LOCK_DEFAULT 0
111#define PCM_LOCK_IRQ 1
112#define PCM_LOCK_IRQSAVE 2
113
114static unsigned long __snd_pcm_stream_lock_mode(struct snd_pcm_substream *substream,
115 unsigned int mode)
116{
117 unsigned long flags = 0;
118 if (substream->pcm->nonatomic) {
119 down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING);
120 mutex_lock(&substream->self_group.mutex);
121 } else {
122 switch (mode) {
123 case PCM_LOCK_DEFAULT:
124 read_lock(&snd_pcm_link_rwlock);
125 break;
126 case PCM_LOCK_IRQ:
127 read_lock_irq(&snd_pcm_link_rwlock);
128 break;
129 case PCM_LOCK_IRQSAVE:
130 read_lock_irqsave(&snd_pcm_link_rwlock, flags);
131 break;
132 }
133 spin_lock(&substream->self_group.lock);
134 }
135 return flags;
136}
137
138static void __snd_pcm_stream_unlock_mode(struct snd_pcm_substream *substream,
139 unsigned int mode, unsigned long flags)
140{
141 if (substream->pcm->nonatomic) {
142 mutex_unlock(&substream->self_group.mutex);
143 up_read(&snd_pcm_link_rwsem);
144 } else {
145 spin_unlock(&substream->self_group.lock);
146
147 switch (mode) {
148 case PCM_LOCK_DEFAULT:
149 read_unlock(&snd_pcm_link_rwlock);
150 break;
151 case PCM_LOCK_IRQ:
152 read_unlock_irq(&snd_pcm_link_rwlock);
153 break;
154 case PCM_LOCK_IRQSAVE:
155 read_unlock_irqrestore(&snd_pcm_link_rwlock, flags);
156 break;
157 }
158 }
159}
160
30b771cf
TI		 161/**
162 * snd_pcm_stream_lock - Lock the PCM stream
163 * @substream: PCM substream
164 *
165 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
166 * flag of the given substream. This also takes the global link rw lock
167 * (or rw sem), too, for avoiding the race with linked streams.
168 */
7af142f7
TI		 169void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
170{
10aa7cad 171 __snd_pcm_stream_lock_mode(substream, PCM_LOCK_DEFAULT);
7af142f7
TI		 172}
173EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
174
30b771cf
TI		 175/**
176 * snd_pcm_stream_lock - Unlock the PCM stream
177 * @substream: PCM substream
178 *
179 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
180 */
7af142f7
TI		 181void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
182{
10aa7cad 183 __snd_pcm_stream_unlock_mode(substream, PCM_LOCK_DEFAULT, 0);
7af142f7
TI		 184}
185EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
186
30b771cf
TI		 187/**
188 * snd_pcm_stream_lock_irq - Lock the PCM stream
189 * @substream: PCM substream
190 *
191 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
192 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
193 * as snd_pcm_stream_lock().
194 */
7af142f7
TI		 195void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
196{
10aa7cad 197 __snd_pcm_stream_lock_mode(substream, PCM_LOCK_IRQ);
7af142f7
TI		 198}
199EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
200
30b771cf
TI		 201/**
202 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
203 * @substream: PCM substream
204 *
205 * This is a counter-part of snd_pcm_stream_lock_irq().
206 */
7af142f7
TI		 207void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
208{
10aa7cad 209 __snd_pcm_stream_unlock_mode(substream, PCM_LOCK_IRQ, 0);
7af142f7
TI		 210}
211EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
212
213unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
214{
10aa7cad 215 return __snd_pcm_stream_lock_mode(substream, PCM_LOCK_IRQSAVE);
7af142f7
TI		 216}
217EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
218
30b771cf
TI		 219/**
220 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
221 * @substream: PCM substream
222 * @flags: irq flags
223 *
224 * This is a counter-part of snd_pcm_stream_lock_irqsave().
225 */
7af142f7
TI		 226void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
227 unsigned long flags)
228{
10aa7cad 229 __snd_pcm_stream_unlock_mode(substream, PCM_LOCK_IRQSAVE, flags);
7af142f7
TI		 230}
231EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
1da177e4 232
877211f5 233int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 234{
877211f5
TI		 235 struct snd_pcm *pcm = substream->pcm;
236 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 237
1da177e4
LT		 238 memset(info, 0, sizeof(*info));
239 info->card = pcm->card->number;
240 info->device = pcm->device;
241 info->stream = substream->stream;
242 info->subdevice = substream->number;
243 strlcpy(info->id, pcm->id, sizeof(info->id));
244 strlcpy(info->name, pcm->name, sizeof(info->name));
245 info->dev_class = pcm->dev_class;
246 info->dev_subclass = pcm->dev_subclass;
247 info->subdevices_count = pstr->substream_count;
248 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
249 strlcpy(info->subname, substream->name, sizeof(info->subname));
e11f0f90 250
1da177e4
LT		 251 return 0;
252}
253
877211f5
TI		 254int snd_pcm_info_user(struct snd_pcm_substream *substream,
255 struct snd_pcm_info __user * _info)
1da177e4 256{
877211f5 257 struct snd_pcm_info *info;
1da177e4
LT		 258 int err;
259
260 info = kmalloc(sizeof(*info), GFP_KERNEL);
261 if (! info)
262 return -ENOMEM;
263 err = snd_pcm_info(substream, info);
264 if (err >= 0) {
265 if (copy_to_user(_info, info, sizeof(*info)))
266 err = -EFAULT;
267 }
268 kfree(info);
269 return err;
270}
271
63825f3a
TI		 272static bool hw_support_mmap(struct snd_pcm_substream *substream)
273{
274 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
275 return false;
85dc0f85
TI		 276 /* architecture supports dma_mmap_coherent()? */
277#if defined(CONFIG_ARCH_NO_COHERENT_DMA_MMAP) || !defined(CONFIG_HAS_DMA)
63825f3a
TI		 278 if (!substream->ops->mmap &&
279 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
280 return false;
281#endif
282 return true;
283}
284
561e1cad
TS		 285static int constrain_mask_params(struct snd_pcm_substream *substream,
286 struct snd_pcm_hw_params *params)
1da177e4 287{
561e1cad
TS		 288 struct snd_pcm_hw_constraints *constrs =
289 &substream->runtime->hw_constraints;
290 struct snd_mask *m;
1da177e4 291 unsigned int k;
561e1cad
TS		 292 struct snd_mask old_mask;
293 int changed;
1da177e4
LT		 294
295 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
296 m = hw_param_mask(params, k);
297 if (snd_mask_empty(m))
298 return -EINVAL;
d81052f9
TS		 299
300 /* This parameter is not requested to change by a caller. */
1da177e4
LT		 301 if (!(params->rmask & (1 << k)))
302 continue;
561e1cad
TS		 303
304 if (trace_hw_mask_param_enabled())
305 old_mask = *m;
306
1da177e4 307 changed = snd_mask_refine(m, constrs_mask(constrs, k));
1da177e4
LT		 308 if (changed < 0)
309 return changed;
82e7d501
TS		 310 if (changed == 0)
311 continue;
561e1cad 312
d81052f9 313 /* Set corresponding flag so that the caller gets it. */
82e7d501
TS		 314 trace_hw_mask_param(substream, k, 0, &old_mask, m);
315 params->cmask |= 1 << k;
1da177e4
LT		 316 }
317
561e1cad
TS		 318 return 0;
319}
320
3432fa04
TS		 321static int constrain_interval_params(struct snd_pcm_substream *substream,
322 struct snd_pcm_hw_params *params)
323{
324 struct snd_pcm_hw_constraints *constrs =
325 &substream->runtime->hw_constraints;
326 struct snd_interval *i;
327 unsigned int k;
328 struct snd_interval old_interval;
329 int changed;
330
1da177e4
LT		 331 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
332 i = hw_param_interval(params, k);
333 if (snd_interval_empty(i))
334 return -EINVAL;
d81052f9
TS		 335
336 /* This parameter is not requested to change by a caller. */
1da177e4
LT		 337 if (!(params->rmask & (1 << k)))
338 continue;
3432fa04
TS		 339
340 if (trace_hw_interval_param_enabled())
341 old_interval = *i;
342
1da177e4 343 changed = snd_interval_refine(i, constrs_interval(constrs, k));
1da177e4
LT		 344 if (changed < 0)
345 return changed;
82e7d501
TS		 346 if (changed == 0)
347 continue;
3432fa04 348
d81052f9 349 /* Set corresponding flag so that the caller gets it. */
82e7d501
TS		 350 trace_hw_interval_param(substream, k, 0, &old_interval, i);
351 params->cmask |= 1 << k;
1da177e4
LT		 352 }
353
3432fa04
TS		 354 return 0;
355}
356
9cc07f55
TS		 357static int constrain_params_by_rules(struct snd_pcm_substream *substream,
358 struct snd_pcm_hw_params *params)
1da177e4 359{
9cc07f55
TS		 360 struct snd_pcm_hw_constraints *constrs =
361 &substream->runtime->hw_constraints;
1da177e4 362 unsigned int k;
5730f9f7 363 unsigned int *rstamps;
1da177e4 364 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
d81052f9 365 unsigned int stamp;
a1c06e39
TS		 366 struct snd_pcm_hw_rule *r;
367 unsigned int d;
9cc07f55
TS		 368 struct snd_mask old_mask;
369 struct snd_interval old_interval;
a1c06e39 370 bool again;
5730f9f7 371 int changed, err = 0;
1da177e4 372
d81052f9
TS		 373 /*
374 * Each application of rule has own sequence number.
375 *
376 * Each member of 'rstamps' array represents the sequence number of
377 * recent application of corresponding rule.
378 */
5730f9f7
TI		 379 rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL);
380 if (!rstamps)
381 return -ENOMEM;
d81052f9
TS		 382
383 /*
384 * Each member of 'vstamps' array represents the sequence number of
385 * recent application of rule in which corresponding parameters were
386 * changed.
387 *
388 * In initial state, elements corresponding to parameters requested by
389 * a caller is 1. For unrequested parameters, corresponding members
390 * have 0 so that the parameters are never changed anymore.
391 */
9cc07f55 392 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
1da177e4 393 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
d81052f9
TS		 394
395 /* Due to the above design, actual sequence number starts at 2. */
396 stamp = 2;
0d4e3999 397retry:
d81052f9 398 /* Apply all rules in order. */
a1c06e39 399 again = false;
0d4e3999 400 for (k = 0; k < constrs->rules_num; k++) {
a1c06e39 401 r = &constrs->rules[k];
d81052f9
TS		 402
403 /*
404 * Check condition bits of this rule. When the rule has
405 * some condition bits, parameter without the bits is
406 * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
407 * is an example of the condition bits.
408 */
0d4e3999
TS		 409 if (r->cond && !(r->cond & params->flags))
410 continue;
d81052f9
TS		 411
412 /*
413 * The 'deps' array includes maximum three dependencies
414 * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fourth
415 * member of this array is a sentinel and should be
416 * negative value.
417 *
418 * This rule should be processed in this time when dependent
419 * parameters were changed at former applications of the other
420 * rules.
421 */
0d4e3999 422 for (d = 0; r->deps[d] >= 0; d++) {
d656b4a6 423 if (vstamps[r->deps[d]] > rstamps[k])
0d4e3999 424 break;
0d4e3999 425 }
d656b4a6 426 if (r->deps[d] < 0)
0d4e3999 427 continue;
be4e31da 428
0d4e3999
TS		 429 if (trace_hw_mask_param_enabled()) {
430 if (hw_is_mask(r->var))
431 old_mask = *hw_param_mask(params, r->var);
432 }
433 if (trace_hw_interval_param_enabled()) {
434 if (hw_is_interval(r->var))
435 old_interval = *hw_param_interval(params, r->var);
436 }
c6706de0 437
0d4e3999 438 changed = r->func(params, r);
5730f9f7
TI		 439 if (changed < 0) {
440 err = changed;
441 goto out;
442 }
c6706de0 443
d81052f9 444 /*
82e7d501 445 * When the parameter is changed, notify it to the caller
d81052f9
TS		 446 * by corresponding returned bit, then preparing for next
447 * iteration.
448 */
0d4e3999 449 if (changed && r->var >= 0) {
82e7d501
TS		 450 if (hw_is_mask(r->var)) {
451 trace_hw_mask_param(substream, r->var,
452 k + 1, &old_mask,
453 hw_param_mask(params, r->var));
1da177e4 454 }
82e7d501
TS		 455 if (hw_is_interval(r->var)) {
456 trace_hw_interval_param(substream, r->var,
457 k + 1, &old_interval,
458 hw_param_interval(params, r->var));
1da177e4 459 }
82e7d501 460
0d4e3999
TS		 461 params->cmask |= (1 << r->var);
462 vstamps[r->var] = stamp;
a1c06e39 463 again = true;
1da177e4 464 }
f74ae15f 465
82e7d501 466 rstamps[k] = stamp++;
0d4e3999
TS		 467 }
468
d81052f9 469 /* Iterate to evaluate all rules till no parameters are changed. */
0d4e3999
TS		 470 if (again)
471 goto retry;
9cc07f55 472
5730f9f7
TI		 473 out:
474 kfree(rstamps);
475 return err;
9cc07f55
TS		 476}
477
f9a076bf
TS		 478static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
479 struct snd_pcm_hw_params *params)
480{
481 const struct snd_interval *i;
482 const struct snd_mask *m;
483 int err;
484
1da177e4 485 if (!params->msbits) {
f9a076bf 486 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
1da177e4
LT		 487 if (snd_interval_single(i))
488 params->msbits = snd_interval_value(i);
489 }
490
491 if (!params->rate_den) {
f9a076bf 492 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 493 if (snd_interval_single(i)) {
494 params->rate_num = snd_interval_value(i);
495 params->rate_den = 1;
496 }
497 }
498
f9a076bf
TS		 499 if (!params->fifo_size) {
500 m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
501 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
502 if (snd_mask_single(m) && snd_interval_single(i)) {
503 err = substream->ops->ioctl(substream,
504 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
505 if (err < 0)
506 return err;
507 }
508 }
509
63825f3a 510 if (!params->info) {
7802fb52
TS		 511 params->info = substream->runtime->hw.info;
512 params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
513 SNDRV_PCM_INFO_DRAIN_TRIGGER);
63825f3a
TI		 514 if (!hw_support_mmap(substream))
515 params->info &= ~(SNDRV_PCM_INFO_MMAP |
516 SNDRV_PCM_INFO_MMAP_VALID);
517 }
7802fb52 518
f9a076bf
TS		 519 return 0;
520}
521
9cc07f55
TS		 522int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
523 struct snd_pcm_hw_params *params)
524{
9cc07f55
TS		 525 int err;
526
527 params->info = 0;
528 params->fifo_size = 0;
529 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
530 params->msbits = 0;
531 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
532 params->rate_num = 0;
533 params->rate_den = 0;
8bea869c 534 }
9cc07f55
TS		 535
536 err = constrain_mask_params(substream, params);
537 if (err < 0)
538 return err;
539
540 err = constrain_interval_params(substream, params);
541 if (err < 0)
542 return err;
543
544 err = constrain_params_by_rules(substream, params);
545 if (err < 0)
546 return err;
547
1da177e4 548 params->rmask = 0;
7802fb52 549
1da177e4
LT		 550 return 0;
551}
e88e8ae6
TI		 552EXPORT_SYMBOL(snd_pcm_hw_refine);
553
877211f5
TI		 554static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
555 struct snd_pcm_hw_params __user * _params)
1da177e4 556{
877211f5 557 struct snd_pcm_hw_params *params;
1da177e4
LT		 558 int err;
559
ef44a1ec
LZ		 560 params = memdup_user(_params, sizeof(*params));
561 if (IS_ERR(params))
562 return PTR_ERR(params);
563
1da177e4 564 err = snd_pcm_hw_refine(substream, params);
f74ae15f
TS		 565 if (err < 0)
566 goto end;
ef44a1ec 567
f74ae15f
TS		 568 err = fixup_unreferenced_params(substream, params);
569 if (err < 0)
570 goto end;
ef44a1ec 571
f74ae15f
TS		 572 if (copy_to_user(_params, params, sizeof(*params)))
573 err = -EFAULT;
574end:
1da177e4
LT		 575 kfree(params);
576 return err;
577}
578
9442e691
TI		 579static int period_to_usecs(struct snd_pcm_runtime *runtime)
580{
581 int usecs;
582
583 if (! runtime->rate)
584 return -1; /* invalid */
585
586 /* take 75% of period time as the deadline */
587 usecs = (750000 / runtime->rate) * runtime->period_size;
588 usecs += ((750000 % runtime->rate) * runtime->period_size) /
589 runtime->rate;
590
591 return usecs;
592}
593
9b0573c0
TI		 594static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
595{
596 snd_pcm_stream_lock_irq(substream);
597 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
598 substream->runtime->status->state = state;
599 snd_pcm_stream_unlock_irq(substream);
600}
601
90bbaf66
JY		 602static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
603 int event)
604{
605#ifdef CONFIG_SND_PCM_TIMER
606 if (substream->timer)
607 snd_timer_notify(substream->timer, event,
608 &substream->runtime->trigger_tstamp);
609#endif
610}
611
60f96aae
TS		 612/**
613 * snd_pcm_hw_param_choose - choose a configuration defined by @params
614 * @pcm: PCM instance
615 * @params: the hw_params instance
616 *
617 * Choose one configuration from configuration space defined by @params.
618 * The configuration chosen is that obtained fixing in this order:
619 * first access, first format, first subformat, min channels,
620 * min rate, min period time, max buffer size, min tick time
621 *
622 * Return: Zero if successful, or a negative error code on failure.
623 */
624static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
625 struct snd_pcm_hw_params *params)
626{
627 static const int vars[] = {
628 SNDRV_PCM_HW_PARAM_ACCESS,
629 SNDRV_PCM_HW_PARAM_FORMAT,
630 SNDRV_PCM_HW_PARAM_SUBFORMAT,
631 SNDRV_PCM_HW_PARAM_CHANNELS,
632 SNDRV_PCM_HW_PARAM_RATE,
633 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
634 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
635 SNDRV_PCM_HW_PARAM_TICK_TIME,
636 -1
637 };
638 const int *v;
7b8a54af
TS		 639 struct snd_mask old_mask;
640 struct snd_interval old_interval;
82e7d501 641 int changed;
60f96aae
TS		 642
643 for (v = vars; *v != -1; v++) {
7b8a54af
TS		 644 /* Keep old parameter to trace. */
645 if (trace_hw_mask_param_enabled()) {
646 if (hw_is_mask(*v))
647 old_mask = *hw_param_mask(params, *v);
648 }
649 if (trace_hw_interval_param_enabled()) {
650 if (hw_is_interval(*v))
651 old_interval = *hw_param_interval(params, *v);
652 }
60f96aae 653 if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
82e7d501 654 changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
60f96aae 655 else
82e7d501 656 changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
e1a3a981 657 if (changed < 0)
82e7d501
TS		 658 return changed;
659 if (changed == 0)
660 continue;
7b8a54af 661
82e7d501 662 /* Trace the changed parameter. */
7b8a54af
TS		 663 if (hw_is_mask(*v)) {
664 trace_hw_mask_param(pcm, *v, 0, &old_mask,
665 hw_param_mask(params, *v));
666 }
667 if (hw_is_interval(*v)) {
668 trace_hw_interval_param(pcm, *v, 0, &old_interval,
669 hw_param_interval(params, *v));
670 }
60f96aae 671 }
7b8a54af 672
60f96aae
TS		 673 return 0;
674}
675
877211f5
TI		 676static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
677 struct snd_pcm_hw_params *params)
1da177e4 678{
877211f5 679 struct snd_pcm_runtime *runtime;
9442e691 680 int err, usecs;
1da177e4
LT		 681 unsigned int bits;
682 snd_pcm_uframes_t frames;
683
7eaa943c
TI		 684 if (PCM_RUNTIME_CHECK(substream))
685 return -ENXIO;
1da177e4 686 runtime = substream->runtime;
1da177e4
LT		 687 snd_pcm_stream_lock_irq(substream);
688 switch (runtime->status->state) {
689 case SNDRV_PCM_STATE_OPEN:
690 case SNDRV_PCM_STATE_SETUP:
691 case SNDRV_PCM_STATE_PREPARED:
692 break;
693 default:
694 snd_pcm_stream_unlock_irq(substream);
695 return -EBADFD;
696 }
697 snd_pcm_stream_unlock_irq(substream);
8eeaa2f9 698#if IS_ENABLED(CONFIG_SND_PCM_OSS)
1da177e4
LT		 699 if (!substream->oss.oss)
700#endif
9c323fcb 701 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 702 return -EBADFD;
703
704 params->rmask = ~0U;
705 err = snd_pcm_hw_refine(substream, params);
706 if (err < 0)
707 goto _error;
708
709 err = snd_pcm_hw_params_choose(substream, params);
710 if (err < 0)
711 goto _error;
712
f9a076bf
TS		 713 err = fixup_unreferenced_params(substream, params);
714 if (err < 0)
715 goto _error;
716
1da177e4
LT		 717 if (substream->ops->hw_params != NULL) {
718 err = substream->ops->hw_params(substream, params);
719 if (err < 0)
720 goto _error;
721 }
722
723 runtime->access = params_access(params);
724 runtime->format = params_format(params);
725 runtime->subformat = params_subformat(params);
726 runtime->channels = params_channels(params);
727 runtime->rate = params_rate(params);
728 runtime->period_size = params_period_size(params);
729 runtime->periods = params_periods(params);
730 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 731 runtime->info = params->info;
732 runtime->rate_num = params->rate_num;
733 runtime->rate_den = params->rate_den;
ab69a490
CL		 734 runtime->no_period_wakeup =
735 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
736 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 737
738 bits = snd_pcm_format_physical_width(runtime->format);
739 runtime->sample_bits = bits;
740 bits *= runtime->channels;
741 runtime->frame_bits = bits;
742 frames = 1;
743 while (bits % 8 != 0) {
744 bits *= 2;
745 frames *= 2;
746 }
747 runtime->byte_align = bits / 8;
748 runtime->min_align = frames;
749
750 /* Default sw params */
751 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
752 runtime->period_step = 1;
1da177e4 753 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 754 runtime->start_threshold = 1;
755 runtime->stop_threshold = runtime->buffer_size;
756 runtime->silence_threshold = 0;
757 runtime->silence_size = 0;
ead4046b
CL		 758 runtime->boundary = runtime->buffer_size;
759 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
760 runtime->boundary *= 2;
1da177e4
LT		 761
762 snd_pcm_timer_resolution_change(substream);
9b0573c0 763 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
9442e691 764
82f68251
JB		 765 if (pm_qos_request_active(&substream->latency_pm_qos_req))
766 pm_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 767 if ((usecs = period_to_usecs(runtime)) >= 0)
82f68251
JB		 768 pm_qos_add_request(&substream->latency_pm_qos_req,
769 PM_QOS_CPU_DMA_LATENCY, usecs);
1da177e4
LT		 770 return 0;
771 _error:
25985edc 772 /* hardware might be unusable from this time,
1da177e4
LT		 773 so we force application to retry to set
774 the correct hardware parameter settings */
9b0573c0 775 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
1da177e4
LT		 776 if (substream->ops->hw_free != NULL)
777 substream->ops->hw_free(substream);
778 return err;
779}
780
877211f5
TI		 781static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
782 struct snd_pcm_hw_params __user * _params)
1da177e4 783{
877211f5 784 struct snd_pcm_hw_params *params;
1da177e4
LT		 785 int err;
786
ef44a1ec
LZ		 787 params = memdup_user(_params, sizeof(*params));
788 if (IS_ERR(params))
789 return PTR_ERR(params);
790
1da177e4 791 err = snd_pcm_hw_params(substream, params);
f74ae15f
TS		 792 if (err < 0)
793 goto end;
ef44a1ec 794
f74ae15f
TS		 795 if (copy_to_user(_params, params, sizeof(*params)))
796 err = -EFAULT;
797end:
1da177e4
LT		 798 kfree(params);
799 return err;
800}
801
877211f5 802static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 803{
877211f5 804 struct snd_pcm_runtime *runtime;
1da177e4
LT		 805 int result = 0;
806
7eaa943c
TI		 807 if (PCM_RUNTIME_CHECK(substream))
808 return -ENXIO;
1da177e4 809 runtime = substream->runtime;
1da177e4
LT		 810 snd_pcm_stream_lock_irq(substream);
811 switch (runtime->status->state) {
812 case SNDRV_PCM_STATE_SETUP:
813 case SNDRV_PCM_STATE_PREPARED:
814 break;
815 default:
816 snd_pcm_stream_unlock_irq(substream);
817 return -EBADFD;
818 }
819 snd_pcm_stream_unlock_irq(substream);
9c323fcb 820 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 821 return -EBADFD;
822 if (substream->ops->hw_free)
823 result = substream->ops->hw_free(substream);
9b0573c0 824 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
82f68251 825 pm_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 826 return result;
827}
828
877211f5
TI		 829static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
830 struct snd_pcm_sw_params *params)
1da177e4 831{
877211f5 832 struct snd_pcm_runtime *runtime;
1250932e 833 int err;
1da177e4 834
7eaa943c
TI		 835 if (PCM_RUNTIME_CHECK(substream))
836 return -ENXIO;
1da177e4 837 runtime = substream->runtime;
1da177e4
LT		 838 snd_pcm_stream_lock_irq(substream);
839 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
840 snd_pcm_stream_unlock_irq(substream);
841 return -EBADFD;
842 }
843 snd_pcm_stream_unlock_irq(substream);
844
145d92e7
DC		 845 if (params->tstamp_mode < 0 ||
846 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
1da177e4 847 return -EINVAL;
58900810
TI		 848 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
849 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
5646eda5 850 return -EINVAL;
1da177e4
LT		 851 if (params->avail_min == 0)
852 return -EINVAL;
1da177e4
LT		 853 if (params->silence_size >= runtime->boundary) {
854 if (params->silence_threshold != 0)
855 return -EINVAL;
856 } else {
857 if (params->silence_size > params->silence_threshold)
858 return -EINVAL;
859 if (params->silence_threshold > runtime->buffer_size)
860 return -EINVAL;
861 }
1250932e 862 err = 0;
1da177e4
LT		 863 snd_pcm_stream_lock_irq(substream);
864 runtime->tstamp_mode = params->tstamp_mode;
58900810
TI		 865 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
866 runtime->tstamp_type = params->tstamp_type;
1da177e4
LT		 867 runtime->period_step = params->period_step;
868 runtime->control->avail_min = params->avail_min;
869 runtime->start_threshold = params->start_threshold;
870 runtime->stop_threshold = params->stop_threshold;
871 runtime->silence_threshold = params->silence_threshold;
872 runtime->silence_size = params->silence_size;
1da177e4
LT		 873 params->boundary = runtime->boundary;
874 if (snd_pcm_running(substream)) {
1da177e4
LT		 875 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
876 runtime->silence_size > 0)
877 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 878 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 879 }
880 snd_pcm_stream_unlock_irq(substream);
1250932e 881 return err;
1da177e4
LT		 882}
883
877211f5
TI		 884static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
885 struct snd_pcm_sw_params __user * _params)
1da177e4 886{
877211f5 887 struct snd_pcm_sw_params params;
1da177e4
LT		 888 int err;
889 if (copy_from_user(&params, _params, sizeof(params)))
890 return -EFAULT;
891 err = snd_pcm_sw_params(substream, &params);
892 if (copy_to_user(_params, &params, sizeof(params)))
893 return -EFAULT;
894 return err;
895}
896
c99c5a3b
TI		 897static inline snd_pcm_uframes_t
898snd_pcm_calc_delay(struct snd_pcm_substream *substream)
899{
900 snd_pcm_uframes_t delay;
901
902 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
903 delay = snd_pcm_playback_hw_avail(substream->runtime);
904 else
905 delay = snd_pcm_capture_avail(substream->runtime);
906 return delay + substream->runtime->delay;
907}
908
877211f5
TI		 909int snd_pcm_status(struct snd_pcm_substream *substream,
910 struct snd_pcm_status *status)
1da177e4 911{
877211f5 912 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 913
914 snd_pcm_stream_lock_irq(substream);
3179f620
PLB		 915
916 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
917 &runtime->audio_tstamp_config);
918
919 /* backwards compatible behavior */
920 if (runtime->audio_tstamp_config.type_requested ==
921 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
922 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
923 runtime->audio_tstamp_config.type_requested =
924 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
925 else
926 runtime->audio_tstamp_config.type_requested =
927 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
928 runtime->audio_tstamp_report.valid = 0;
929 } else
930 runtime->audio_tstamp_report.valid = 1;
931
1da177e4
LT		 932 status->state = runtime->status->state;
933 status->suspended_state = runtime->status->suspended_state;
934 if (status->state == SNDRV_PCM_STATE_OPEN)
935 goto _end;
936 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 937 if (snd_pcm_running(substream)) {
1da177e4 938 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 939 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
940 status->tstamp = runtime->status->tstamp;
3179f620 941 status->driver_tstamp = runtime->driver_tstamp;
4eeaaeae
PLB		 942 status->audio_tstamp =
943 runtime->status->audio_tstamp;
3179f620
PLB		 944 if (runtime->audio_tstamp_report.valid == 1)
945 /* backwards compatibility, no report provided in COMPAT mode */
946 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
947 &status->audio_tstamp_accuracy,
948 &runtime->audio_tstamp_report);
949
8c121586
JK		 950 goto _tstamp_end;
951 }
0d59b814
PLB		 952 } else {
953 /* get tstamp only in fallback mode and only if enabled */
954 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
955 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 956 }
8c121586 957 _tstamp_end:
1da177e4
LT		 958 status->appl_ptr = runtime->control->appl_ptr;
959 status->hw_ptr = runtime->status->hw_ptr;
763e5067 960 status->avail = snd_pcm_avail(substream);
c99c5a3b
TI		 961 status->delay = snd_pcm_running(substream) ?
962 snd_pcm_calc_delay(substream) : 0;
1da177e4
LT		 963 status->avail_max = runtime->avail_max;
964 status->overrange = runtime->overrange;
965 runtime->avail_max = 0;
966 runtime->overrange = 0;
967 _end:
968 snd_pcm_stream_unlock_irq(substream);
969 return 0;
970}
971
877211f5 972static int snd_pcm_status_user(struct snd_pcm_substream *substream,
38ca2a4d
PLB		 973 struct snd_pcm_status __user * _status,
974 bool ext)
1da177e4 975{
877211f5 976 struct snd_pcm_status status;
1da177e4 977 int res;
38ca2a4d 978
1da177e4 979 memset(&status, 0, sizeof(status));
38ca2a4d
PLB		 980 /*
981 * with extension, parameters are read/write,
982 * get audio_tstamp_data from user,
983 * ignore rest of status structure
984 */
985 if (ext && get_user(status.audio_tstamp_data,
986 (u32 __user *)(&_status->audio_tstamp_data)))
987 return -EFAULT;
1da177e4
LT		 988 res = snd_pcm_status(substream, &status);
989 if (res < 0)
990 return res;
991 if (copy_to_user(_status, &status, sizeof(status)))
992 return -EFAULT;
993 return 0;
994}
995
877211f5
TI		 996static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
997 struct snd_pcm_channel_info * info)
1da177e4 998{
877211f5 999 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1000 unsigned int channel;
1001
1da177e4
LT		 1002 channel = info->channel;
1003 runtime = substream->runtime;
1004 snd_pcm_stream_lock_irq(substream);
1005 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
1006 snd_pcm_stream_unlock_irq(substream);
1007 return -EBADFD;
1008 }
1009 snd_pcm_stream_unlock_irq(substream);
1010 if (channel >= runtime->channels)
1011 return -EINVAL;
1012 memset(info, 0, sizeof(*info));
1013 info->channel = channel;
1014 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
1015}
1016
877211f5
TI		 1017static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
1018 struct snd_pcm_channel_info __user * _info)
1da177e4 1019{
877211f5 1020 struct snd_pcm_channel_info info;
1da177e4
LT		 1021 int res;
1022
1023 if (copy_from_user(&info, _info, sizeof(info)))
1024 return -EFAULT;
1025 res = snd_pcm_channel_info(substream, &info);
1026 if (res < 0)
1027 return res;
1028 if (copy_to_user(_info, &info, sizeof(info)))
1029 return -EFAULT;
1030 return 0;
1031}
1032
877211f5 1033static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 1034{
877211f5 1035 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1036 if (runtime->trigger_master == NULL)
1037 return;
1038 if (runtime->trigger_master == substream) {
2b79d7a6
PLB		 1039 if (!runtime->trigger_tstamp_latched)
1040 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 1041 } else {
1042 snd_pcm_trigger_tstamp(runtime->trigger_master);
1043 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
1044 }
1045 runtime->trigger_master = NULL;
1046}
1047
1048struct action_ops {
877211f5
TI		 1049 int (*pre_action)(struct snd_pcm_substream *substream, int state);
1050 int (*do_action)(struct snd_pcm_substream *substream, int state);
1051 void (*undo_action)(struct snd_pcm_substream *substream, int state);
1052 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 1053};
1054
1055/*
1056 * this functions is core for handling of linked stream
1057 * Note: the stream state might be changed also on failure
1058 * Note2: call with calling stream lock + link lock
1059 */
b17154cf 1060static int snd_pcm_action_group(const struct action_ops *ops,
877211f5 1061 struct snd_pcm_substream *substream,
1da177e4
LT		 1062 int state, int do_lock)
1063{
877211f5
TI		 1064 struct snd_pcm_substream *s = NULL;
1065 struct snd_pcm_substream *s1;
dde1c652 1066 int res = 0, depth = 1;
1da177e4 1067
ef991b95 1068 snd_pcm_group_for_each_entry(s, substream) {
257f8cce
TI		 1069 if (do_lock && s != substream) {
1070 if (s->pcm->nonatomic)
dde1c652 1071 mutex_lock_nested(&s->self_group.mutex, depth);
257f8cce 1072 else
dde1c652
TI		 1073 spin_lock_nested(&s->self_group.lock, depth);
1074 depth++;
257f8cce 1075 }
1da177e4
LT		 1076 res = ops->pre_action(s, state);
1077 if (res < 0)
1078 goto _unlock;
1079 }
ef991b95 1080 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 1081 res = ops->do_action(s, state);
1082 if (res < 0) {
1083 if (ops->undo_action) {
ef991b95 1084 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 1085 if (s1 == s) /* failed stream */
1086 break;
1087 ops->undo_action(s1, state);
1088 }
1089 }
1090 s = NULL; /* unlock all */
1091 goto _unlock;
1092 }
1093 }
ef991b95 1094 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 1095 ops->post_action(s, state);
1096 }
1097 _unlock:
1098 if (do_lock) {
1099 /* unlock streams */
ef991b95 1100 snd_pcm_group_for_each_entry(s1, substream) {
257f8cce 1101 if (s1 != substream) {
811deede 1102 if (s1->pcm->nonatomic)
257f8cce
TI		 1103 mutex_unlock(&s1->self_group.mutex);
1104 else
1105 spin_unlock(&s1->self_group.lock);
1106 }
1da177e4
LT		 1107 if (s1 == s) /* end */
1108 break;
1109 }
1110 }
1111 return res;
1112}
1113
1114/*
1115 * Note: call with stream lock
1116 */
b17154cf 1117static int snd_pcm_action_single(const struct action_ops *ops,
877211f5 1118 struct snd_pcm_substream *substream,
1da177e4
LT		 1119 int state)
1120{
1121 int res;
1122
1123 res = ops->pre_action(substream, state);
1124 if (res < 0)
1125 return res;
1126 res = ops->do_action(substream, state);
1127 if (res == 0)
1128 ops->post_action(substream, state);
1129 else if (ops->undo_action)
1130 ops->undo_action(substream, state);
1131 return res;
1132}
1133
a41c4cb9
TI		 1134static void snd_pcm_group_assign(struct snd_pcm_substream *substream,
1135 struct snd_pcm_group *new_group)
1136{
1137 substream->group = new_group;
1138 list_move(&substream->link_list, &new_group->substreams);
1139}
1140
aa8edd8c
TI		 1141/*
1142 * Note: call with stream lock
1143 */
b17154cf 1144static int snd_pcm_action(const struct action_ops *ops,
aa8edd8c
TI		 1145 struct snd_pcm_substream *substream,
1146 int state)
257f8cce
TI		 1147{
1148 int res;
1149
aa8edd8c
TI		 1150 if (!snd_pcm_stream_linked(substream))
1151 return snd_pcm_action_single(ops, substream, state);
1152
1153 if (substream->pcm->nonatomic) {
257f8cce
TI		 1154 if (!mutex_trylock(&substream->group->mutex)) {
1155 mutex_unlock(&substream->self_group.mutex);
1156 mutex_lock(&substream->group->mutex);
1157 mutex_lock(&substream->self_group.mutex);
1158 }
1159 res = snd_pcm_action_group(ops, substream, state, 1);
1160 mutex_unlock(&substream->group->mutex);
1161 } else {
1da177e4
LT		 1162 if (!spin_trylock(&substream->group->lock)) {
1163 spin_unlock(&substream->self_group.lock);
1164 spin_lock(&substream->group->lock);
1165 spin_lock(&substream->self_group.lock);
1166 }
1167 res = snd_pcm_action_group(ops, substream, state, 1);
1168 spin_unlock(&substream->group->lock);
1da177e4
LT		 1169 }
1170 return res;
1171}
1172
1173/*
1174 * Note: don't use any locks before
1175 */
b17154cf 1176static int snd_pcm_action_lock_irq(const struct action_ops *ops,
877211f5 1177 struct snd_pcm_substream *substream,
1da177e4
LT		 1178 int state)
1179{
1180 int res;
1181
e3a4bd5e
TI		 1182 snd_pcm_stream_lock_irq(substream);
1183 res = snd_pcm_action(ops, substream, state);
1184 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1185 return res;
1186}
1187
1188/*
1189 */
b17154cf 1190static int snd_pcm_action_nonatomic(const struct action_ops *ops,
877211f5 1191 struct snd_pcm_substream *substream,
1da177e4
LT		 1192 int state)
1193{
1194 int res;
1195
1196 down_read(&snd_pcm_link_rwsem);
1197 if (snd_pcm_stream_linked(substream))
1198 res = snd_pcm_action_group(ops, substream, state, 0);
1199 else
1200 res = snd_pcm_action_single(ops, substream, state);
1201 up_read(&snd_pcm_link_rwsem);
1202 return res;
1203}
1204
1205/*
1206 * start callbacks
1207 */
877211f5 1208static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 1209{
877211f5 1210 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1211 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1212 return -EBADFD;
1213 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1214 !snd_pcm_playback_data(substream))
1215 return -EPIPE;
2b79d7a6 1216 runtime->trigger_tstamp_latched = false;
1da177e4
LT		 1217 runtime->trigger_master = substream;
1218 return 0;
1219}
1220
877211f5 1221static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1222{
1223 if (substream->runtime->trigger_master != substream)
1224 return 0;
1225 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1226}
1227
877211f5 1228static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1229{
1230 if (substream->runtime->trigger_master == substream)
1231 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1232}
1233
877211f5 1234static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 1235{
877211f5 1236 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1237 snd_pcm_trigger_tstamp(substream);
6af3fb72 1238 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 1239 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1240 runtime->rate;
1da177e4
LT		 1241 runtime->status->state = state;
1242 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1243 runtime->silence_size > 0)
1244 snd_pcm_playback_silence(substream, ULONG_MAX);
90bbaf66 1245 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
1da177e4
LT		 1246}
1247
b17154cf 1248static const struct action_ops snd_pcm_action_start = {
1da177e4
LT		 1249 .pre_action = snd_pcm_pre_start,
1250 .do_action = snd_pcm_do_start,
1251 .undo_action = snd_pcm_undo_start,
1252 .post_action = snd_pcm_post_start
1253};
1254
1255/**
1c85cc64 1256 * snd_pcm_start - start all linked streams
df8db936 1257 * @substream: the PCM substream instance
eb7c06e8
YB		 1258 *
1259 * Return: Zero if successful, or a negative error code.
c2c86a97 1260 * The stream lock must be acquired before calling this function.
1da177e4 1261 */
877211f5 1262int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 1263{
877211f5
TI		 1264 return snd_pcm_action(&snd_pcm_action_start, substream,
1265 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 1266}
1267
c2c86a97
TI		 1268/* take the stream lock and start the streams */
1269static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
1270{
1271 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
1272 SNDRV_PCM_STATE_RUNNING);
1273}
1274
1da177e4
LT		 1275/*
1276 * stop callbacks
1277 */
877211f5 1278static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1279{
877211f5 1280 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1281 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1282 return -EBADFD;
1283 runtime->trigger_master = substream;
1284 return 0;
1285}
1286
877211f5 1287static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1288{
1289 if (substream->runtime->trigger_master == substream &&
1290 snd_pcm_running(substream))
1291 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1292 return 0; /* unconditonally stop all substreams */
1293}
1294
877211f5 1295static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1296{
877211f5 1297 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1298 if (runtime->status->state != state) {
1299 snd_pcm_trigger_tstamp(substream);
9bc889b4 1300 runtime->status->state = state;
90bbaf66 1301 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
1da177e4
LT		 1302 }
1303 wake_up(&runtime->sleep);
c91a988d 1304 wake_up(&runtime->tsleep);
1da177e4
LT		 1305}
1306
b17154cf 1307static const struct action_ops snd_pcm_action_stop = {
1da177e4
LT		 1308 .pre_action = snd_pcm_pre_stop,
1309 .do_action = snd_pcm_do_stop,
1310 .post_action = snd_pcm_post_stop
1311};
1312
1313/**
1c85cc64 1314 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 1315 * @substream: the PCM substream instance
1316 * @state: PCM state after stopping the stream
1da177e4 1317 *
1c85cc64 1318 * The state of each stream is then changed to the given state unconditionally.
eb7c06e8 1319 *
0a11458c 1320 * Return: Zero if successful, or a negative error code.
1da177e4 1321 */
fea952e5 1322int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 1323{
1324 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1325}
e88e8ae6
TI		 1326EXPORT_SYMBOL(snd_pcm_stop);
1327
1da177e4 1328/**
1c85cc64 1329 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 1330 * @substream: the PCM substream
1da177e4 1331 *
1c85cc64 1332 * After stopping, the state is changed to SETUP.
1da177e4 1333 * Unlike snd_pcm_stop(), this affects only the given stream.
eb7c06e8
YB		 1334 *
1335 * Return: Zero if succesful, or a negative error code.
1da177e4 1336 */
877211f5 1337int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 1338{
877211f5
TI		 1339 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1340 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 1341}
1342
1fb8510c
TI		 1343/**
1344 * snd_pcm_stop_xrun - stop the running streams as XRUN
1345 * @substream: the PCM substream instance
1fb8510c
TI		 1346 *
1347 * This stops the given running substream (and all linked substreams) as XRUN.
1348 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1349 *
1350 * Return: Zero if successful, or a negative error code.
1351 */
1352int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1353{
1354 unsigned long flags;
1fb8510c
TI		 1355
1356 snd_pcm_stream_lock_irqsave(substream, flags);
e647f5a5 1357 if (substream->runtime && snd_pcm_running(substream))
9cd641ed 1358 __snd_pcm_xrun(substream);
1fb8510c 1359 snd_pcm_stream_unlock_irqrestore(substream, flags);
9cd641ed 1360 return 0;
1fb8510c
TI		 1361}
1362EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1363
1da177e4
LT		 1364/*
1365 * pause callbacks
1366 */
877211f5 1367static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1368{
877211f5 1369 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1370 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1371 return -ENOSYS;
1372 if (push) {
1373 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1374 return -EBADFD;
1375 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1376 return -EBADFD;
1377 runtime->trigger_master = substream;
1378 return 0;
1379}
1380
877211f5 1381static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1382{
1383 if (substream->runtime->trigger_master != substream)
1384 return 0;
56385a12
JK		 1385 /* some drivers might use hw_ptr to recover from the pause -
1386 update the hw_ptr now */
1387 if (push)
1388 snd_pcm_update_hw_ptr(substream);
6af3fb72 1389 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 1390 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1391 * delta, effectively to skip the check once.
1392 */
1393 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 1394 return substream->ops->trigger(substream,
1395 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1396 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1397}
1398
877211f5 1399static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1400{
1401 if (substream->runtime->trigger_master == substream)
1402 substream->ops->trigger(substream,
1403 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1404 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1405}
1406
877211f5 1407static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1408{
877211f5 1409 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1410 snd_pcm_trigger_tstamp(substream);
1411 if (push) {
1412 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
90bbaf66 1413 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
1da177e4 1414 wake_up(&runtime->sleep);
c91a988d 1415 wake_up(&runtime->tsleep);
1da177e4
LT		 1416 } else {
1417 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
90bbaf66 1418 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
1da177e4
LT		 1419 }
1420}
1421
b17154cf 1422static const struct action_ops snd_pcm_action_pause = {
1da177e4
LT		 1423 .pre_action = snd_pcm_pre_pause,
1424 .do_action = snd_pcm_do_pause,
1425 .undo_action = snd_pcm_undo_pause,
1426 .post_action = snd_pcm_post_pause
1427};
1428
1429/*
1430 * Push/release the pause for all linked streams.
1431 */
877211f5 1432static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1433{
1434 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1435}
1436
1437#ifdef CONFIG_PM
1438/* suspend */
1439
877211f5 1440static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1441{
877211f5 1442 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1443 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1444 return -EBUSY;
1445 runtime->trigger_master = substream;
1446 return 0;
1447}
1448
877211f5 1449static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1450{
877211f5 1451 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1452 if (runtime->trigger_master != substream)
1453 return 0;
1454 if (! snd_pcm_running(substream))
1455 return 0;
1456 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1457 return 0; /* suspend unconditionally */
1458}
1459
877211f5 1460static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1461{
877211f5 1462 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1463 snd_pcm_trigger_tstamp(substream);
9bc889b4
TI		 1464 runtime->status->suspended_state = runtime->status->state;
1465 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
90bbaf66 1466 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
1da177e4 1467 wake_up(&runtime->sleep);
c91a988d 1468 wake_up(&runtime->tsleep);
1da177e4
LT		 1469}
1470
b17154cf 1471static const struct action_ops snd_pcm_action_suspend = {
1da177e4
LT		 1472 .pre_action = snd_pcm_pre_suspend,
1473 .do_action = snd_pcm_do_suspend,
1474 .post_action = snd_pcm_post_suspend
1475};
1476
1477/**
1c85cc64 1478 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1479 * @substream: the PCM substream
1da177e4 1480 *
1da177e4 1481 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1482 *
1483 * Return: Zero if successful (or @substream is %NULL), or a negative error
1484 * code.
1da177e4 1485 */
877211f5 1486int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1487{
1488 int err;
1489 unsigned long flags;
1490
603bf524
TI		 1491 if (! substream)
1492 return 0;
1493
1da177e4
LT		 1494 snd_pcm_stream_lock_irqsave(substream, flags);
1495 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1496 snd_pcm_stream_unlock_irqrestore(substream, flags);
1497 return err;
1498}
e88e8ae6
TI		 1499EXPORT_SYMBOL(snd_pcm_suspend);
1500
1da177e4 1501/**
1c85cc64 1502 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1503 * @pcm: the PCM instance
1da177e4 1504 *
1da177e4 1505 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1506 *
1507 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1da177e4 1508 */
877211f5 1509int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1510{
877211f5 1511 struct snd_pcm_substream *substream;
1da177e4
LT		 1512 int stream, err = 0;
1513
603bf524
TI		 1514 if (! pcm)
1515 return 0;
1516
1da177e4 1517 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1518 for (substream = pcm->streams[stream].substream;
1519 substream; substream = substream->next) {
1da177e4
LT		 1520 /* FIXME: the open/close code should lock this as well */
1521 if (substream->runtime == NULL)
1522 continue;
1523 err = snd_pcm_suspend(substream);
1524 if (err < 0 && err != -EBUSY)
1525 return err;
1526 }
1527 }
1528 return 0;
1529}
e88e8ae6
TI		 1530EXPORT_SYMBOL(snd_pcm_suspend_all);
1531
1da177e4
LT		 1532/* resume */
1533
877211f5 1534static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1535{
877211f5 1536 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1537 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1538 return -ENOSYS;
1539 runtime->trigger_master = substream;
1540 return 0;
1541}
1542
877211f5 1543static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1544{
877211f5 1545 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1546 if (runtime->trigger_master != substream)
1547 return 0;
1548 /* DMA not running previously? */
1549 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1550 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1551 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1552 return 0;
1553 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1554}
1555
877211f5 1556static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1557{
1558 if (substream->runtime->trigger_master == substream &&
1559 snd_pcm_running(substream))
1560 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1561}
1562
877211f5 1563static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1564{
877211f5 1565 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1566 snd_pcm_trigger_tstamp(substream);
9bc889b4 1567 runtime->status->state = runtime->status->suspended_state;
90bbaf66 1568 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
1da177e4
LT		 1569}
1570
b17154cf 1571static const struct action_ops snd_pcm_action_resume = {
1da177e4
LT		 1572 .pre_action = snd_pcm_pre_resume,
1573 .do_action = snd_pcm_do_resume,
1574 .undo_action = snd_pcm_undo_resume,
1575 .post_action = snd_pcm_post_resume
1576};
1577
877211f5 1578static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1579{
68b4acd3 1580 return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1da177e4
LT		 1581}
1582
1583#else
1584
877211f5 1585static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1586{
1587 return -ENOSYS;
1588}
1589
1590#endif /* CONFIG_PM */
1591
1592/*
1593 * xrun ioctl
1594 *
1595 * Change the RUNNING stream(s) to XRUN state.
1596 */
877211f5 1597static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1598{
877211f5 1599 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1600 int result;
1601
1da177e4
LT		 1602 snd_pcm_stream_lock_irq(substream);
1603 switch (runtime->status->state) {
1604 case SNDRV_PCM_STATE_XRUN:
1605 result = 0; /* already there */
1606 break;
1607 case SNDRV_PCM_STATE_RUNNING:
9cd641ed
TI		 1608 __snd_pcm_xrun(substream);
1609 result = 0;
1da177e4
LT		 1610 break;
1611 default:
1612 result = -EBADFD;
1613 }
1614 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1615 return result;
1616}
1617
1618/*
1619 * reset ioctl
1620 */
877211f5 1621static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1622{
877211f5 1623 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1624 switch (runtime->status->state) {
1625 case SNDRV_PCM_STATE_RUNNING:
1626 case SNDRV_PCM_STATE_PREPARED:
1627 case SNDRV_PCM_STATE_PAUSED:
1628 case SNDRV_PCM_STATE_SUSPENDED:
1629 return 0;
1630 default:
1631 return -EBADFD;
1632 }
1633}
1634
877211f5 1635static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1636{
877211f5 1637 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1638 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1639 if (err < 0)
1640 return err;
1da177e4 1641 runtime->hw_ptr_base = 0;
e7636925
JK		 1642 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1643 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1644 runtime->silence_start = runtime->status->hw_ptr;
1645 runtime->silence_filled = 0;
1646 return 0;
1647}
1648
877211f5 1649static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1650{
877211f5 1651 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1652 runtime->control->appl_ptr = runtime->status->hw_ptr;
1653 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1654 runtime->silence_size > 0)
1655 snd_pcm_playback_silence(substream, ULONG_MAX);
1656}
1657
b17154cf 1658static const struct action_ops snd_pcm_action_reset = {
1da177e4
LT		 1659 .pre_action = snd_pcm_pre_reset,
1660 .do_action = snd_pcm_do_reset,
1661 .post_action = snd_pcm_post_reset
1662};
1663
877211f5 1664static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1665{
1666 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1667}
1668
1669/*
1670 * prepare ioctl
1671 */
0df63e44
TI		 1672/* we use the second argument for updating f_flags */
1673static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1674 int f_flags)
1da177e4 1675{
877211f5 1676 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1677 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1678 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1679 return -EBADFD;
1680 if (snd_pcm_running(substream))
1681 return -EBUSY;
0df63e44 1682 substream->f_flags = f_flags;
1da177e4
LT		 1683 return 0;
1684}
1685
877211f5 1686static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1687{
1688 int err;
1689 err = substream->ops->prepare(substream);
1690 if (err < 0)
1691 return err;
1692 return snd_pcm_do_reset(substream, 0);
1693}
1694
877211f5 1695static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1696{
877211f5 1697 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1698 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1699 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1700}
1701
b17154cf 1702static const struct action_ops snd_pcm_action_prepare = {
1da177e4
LT		 1703 .pre_action = snd_pcm_pre_prepare,
1704 .do_action = snd_pcm_do_prepare,
1705 .post_action = snd_pcm_post_prepare
1706};
1707
1708/**
1c85cc64 1709 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1710 * @substream: the PCM substream instance
0df63e44 1711 * @file: file to refer f_flags
eb7c06e8
YB		 1712 *
1713 * Return: Zero if successful, or a negative error code.
1da177e4 1714 */
0df63e44
TI		 1715static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1716 struct file *file)
1da177e4 1717{
0df63e44
TI		 1718 int f_flags;
1719
1720 if (file)
1721 f_flags = file->f_flags;
1722 else
1723 f_flags = substream->f_flags;
1da177e4 1724
1b745cd9
TI		 1725 snd_pcm_stream_lock_irq(substream);
1726 switch (substream->runtime->status->state) {
1727 case SNDRV_PCM_STATE_PAUSED:
1728 snd_pcm_pause(substream, 0);
1729 /* fallthru */
1730 case SNDRV_PCM_STATE_SUSPENDED:
1731 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1732 break;
1733 }
1734 snd_pcm_stream_unlock_irq(substream);
1735
68b4acd3
TI		 1736 return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1737 substream, f_flags);
1da177e4
LT		 1738}
1739
1740/*
1741 * drain ioctl
1742 */
1743
877211f5 1744static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1745{
4f7c39dc
TI		 1746 struct snd_pcm_runtime *runtime = substream->runtime;
1747 switch (runtime->status->state) {
1748 case SNDRV_PCM_STATE_OPEN:
1749 case SNDRV_PCM_STATE_DISCONNECTED:
1750 case SNDRV_PCM_STATE_SUSPENDED:
1751 return -EBADFD;
1752 }
1753 runtime->trigger_master = substream;
1da177e4
LT		 1754 return 0;
1755}
1756
877211f5 1757static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1758{
877211f5 1759 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1760 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1761 switch (runtime->status->state) {
1762 case SNDRV_PCM_STATE_PREPARED:
1763 /* start playback stream if possible */
1764 if (! snd_pcm_playback_empty(substream)) {
1765 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1766 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
70372a75
TI		 1767 } else {
1768 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1da177e4
LT		 1769 }
1770 break;
1771 case SNDRV_PCM_STATE_RUNNING:
1772 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1773 break;
4f7c39dc
TI		 1774 case SNDRV_PCM_STATE_XRUN:
1775 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1776 break;
1da177e4
LT		 1777 default:
1778 break;
1779 }
1780 } else {
1781 /* stop running stream */
1782 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1783 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1784 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1785 snd_pcm_do_stop(substream, new_state);
1786 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1787 }
1788 }
48d88297
LY		 1789
1790 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1791 runtime->trigger_master == substream &&
1792 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1793 return substream->ops->trigger(substream,
1794 SNDRV_PCM_TRIGGER_DRAIN);
1795
1da177e4
LT		 1796 return 0;
1797}
1798
877211f5 1799static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1800{
1801}
1802
b17154cf 1803static const struct action_ops snd_pcm_action_drain_init = {
1da177e4
LT		 1804 .pre_action = snd_pcm_pre_drain_init,
1805 .do_action = snd_pcm_do_drain_init,
1806 .post_action = snd_pcm_post_drain_init
1807};
1808
877211f5 1809static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1810
1811/*
1812 * Drain the stream(s).
1813 * When the substream is linked, sync until the draining of all playback streams
1814 * is finished.
1815 * After this call, all streams are supposed to be either SETUP or DRAINING
1816 * (capture only) state.
1817 */
4cdc115f
TI		 1818static int snd_pcm_drain(struct snd_pcm_substream *substream,
1819 struct file *file)
1da177e4 1820{
877211f5
TI		 1821 struct snd_card *card;
1822 struct snd_pcm_runtime *runtime;
ef991b95 1823 struct snd_pcm_substream *s;
ac6424b9 1824 wait_queue_entry_t wait;
1da177e4 1825 int result = 0;
4cdc115f 1826 int nonblock = 0;
1da177e4 1827
1da177e4
LT		 1828 card = substream->pcm->card;
1829 runtime = substream->runtime;
1830
1831 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1832 return -EBADFD;
1833
4cdc115f
TI		 1834 if (file) {
1835 if (file->f_flags & O_NONBLOCK)
1836 nonblock = 1;
1837 } else if (substream->f_flags & O_NONBLOCK)
1838 nonblock = 1;
1839
21cb2a2e 1840 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1841 snd_pcm_stream_lock_irq(substream);
1842 /* resume pause */
d3a7dcfe 1843 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1844 snd_pcm_pause(substream, 0);
1845
1846 /* pre-start/stop - all running streams are changed to DRAINING state */
1847 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1848 if (result < 0)
1849 goto unlock;
1850 /* in non-blocking, we don't wait in ioctl but let caller poll */
1851 if (nonblock) {
1852 result = -EAGAIN;
1853 goto unlock;
21cb2a2e 1854 }
1da177e4
LT		 1855
1856 for (;;) {
1857 long tout;
d3a7dcfe 1858 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1859 if (signal_pending(current)) {
1860 result = -ERESTARTSYS;
1861 break;
1862 }
d3a7dcfe
TI		 1863 /* find a substream to drain */
1864 to_check = NULL;
1865 snd_pcm_group_for_each_entry(s, substream) {
1866 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1867 continue;
1868 runtime = s->runtime;
1869 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1870 to_check = runtime;
21cb2a2e 1871 break;
d3a7dcfe 1872 }
21cb2a2e 1873 }
d3a7dcfe
TI		 1874 if (!to_check)
1875 break; /* all drained */
1876 init_waitqueue_entry(&wait, current);
1877 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1878 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1879 up_read(&snd_pcm_link_rwsem);
f2b3614c
TI		 1880 if (runtime->no_period_wakeup)
1881 tout = MAX_SCHEDULE_TIMEOUT;
1882 else {
1883 tout = 10;
1884 if (runtime->rate) {
1885 long t = runtime->period_size * 2 / runtime->rate;
1886 tout = max(t, tout);
1887 }
1888 tout = msecs_to_jiffies(tout * 1000);
1889 }
1890 tout = schedule_timeout_interruptible(tout);
d3a7dcfe 1891 down_read(&snd_pcm_link_rwsem);
1da177e4 1892 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1893 remove_wait_queue(&to_check->sleep, &wait);
0914f796
TI		 1894 if (card->shutdown) {
1895 result = -ENODEV;
1896 break;
1897 }
1da177e4
LT		 1898 if (tout == 0) {
1899 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1900 result = -ESTRPIPE;
1901 else {
09e56df8
TI		 1902 dev_dbg(substream->pcm->card->dev,
1903 "playback drain error (DMA or IRQ trouble?)\n");
1da177e4
LT		 1904 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1905 result = -EIO;
1906 }
1907 break;
1908 }
1da177e4 1909 }
21cb2a2e 1910
4cdc115f 1911 unlock:
21cb2a2e 1912 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1913 up_read(&snd_pcm_link_rwsem);
1da177e4
LT		 1914
1915 return result;
1916}
1917
1918/*
1919 * drop ioctl
1920 *
1921 * Immediately put all linked substreams into SETUP state.
1922 */
877211f5 1923static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1924{
877211f5 1925 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1926 int result = 0;
1927
7eaa943c
TI		 1928 if (PCM_RUNTIME_CHECK(substream))
1929 return -ENXIO;
1da177e4 1930 runtime = substream->runtime;
1da177e4 1931
de1b8b93 1932 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
4b95ff78 1933 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1934 return -EBADFD;
1935
1da177e4
LT		 1936 snd_pcm_stream_lock_irq(substream);
1937 /* resume pause */
1938 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1939 snd_pcm_pause(substream, 0);
1940
1941 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1942 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1943 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1944
1da177e4
LT		 1945 return result;
1946}
1947
1948
0888c321 1949static bool is_pcm_file(struct file *file)
1da177e4 1950{
0888c321 1951 struct inode *inode = file_inode(file);
d819fb21 1952 struct snd_pcm *pcm;
f87135f5
CL		 1953 unsigned int minor;
1954
0888c321
AV		 1955 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1956 return false;
1da177e4 1957 minor = iminor(inode);
d819fb21
TI		 1958 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
1959 if (!pcm)
1960 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1961 if (!pcm)
1962 return false;
1963 snd_card_unref(pcm->card);
1964 return true;
1da177e4
LT		 1965}
1966
1967/*
1968 * PCM link handling
1969 */
877211f5 1970static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1971{
1972 int res = 0;
877211f5
TI		 1973 struct snd_pcm_file *pcm_file;
1974 struct snd_pcm_substream *substream1;
1662591b 1975 struct snd_pcm_group *group;
0888c321 1976 struct fd f = fdget(fd);
1da177e4 1977
0888c321 1978 if (!f.file)
1da177e4 1979 return -EBADFD;
0888c321
AV		 1980 if (!is_pcm_file(f.file)) {
1981 res = -EBADFD;
1982 goto _badf;
1983 }
1984 pcm_file = f.file->private_data;
1da177e4 1985 substream1 = pcm_file->substream;
73365cb1 1986 group = kzalloc(sizeof(*group), GFP_KERNEL);
1662591b
TI		 1987 if (!group) {
1988 res = -ENOMEM;
1989 goto _nolock;
1990 }
73365cb1 1991 snd_pcm_group_init(group);
b888a5f7 1992 down_write_nonfifo(&snd_pcm_link_rwsem);
1da177e4
LT		 1993 write_lock_irq(&snd_pcm_link_rwlock);
1994 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
257f8cce
TI		 1995 substream->runtime->status->state != substream1->runtime->status->state ||
1996 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1da177e4
LT		 1997 res = -EBADFD;
1998 goto _end;
1999 }
2000 if (snd_pcm_stream_linked(substream1)) {
2001 res = -EALREADY;
2002 goto _end;
2003 }
2004 if (!snd_pcm_stream_linked(substream)) {
a41c4cb9 2005 snd_pcm_group_assign(substream, group);
dd6c5cd8 2006 group = NULL;
1da177e4 2007 }
a41c4cb9 2008 snd_pcm_group_assign(substream1, substream->group);
1da177e4
LT		 2009 _end:
2010 write_unlock_irq(&snd_pcm_link_rwlock);
2011 up_write(&snd_pcm_link_rwsem);
1662591b 2012 _nolock:
dd6c5cd8 2013 kfree(group);
0888c321
AV		 2014 _badf:
2015 fdput(f);
1da177e4
LT		 2016 return res;
2017}
2018
877211f5 2019static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4 2020{
a41c4cb9 2021 snd_pcm_group_assign(substream, &substream->self_group);
1da177e4
LT		 2022}
2023
877211f5 2024static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 2025{
a41c4cb9 2026 struct snd_pcm_group *group;
1da177e4
LT		 2027 int res = 0;
2028
b888a5f7 2029 down_write_nonfifo(&snd_pcm_link_rwsem);
1da177e4
LT		 2030 write_lock_irq(&snd_pcm_link_rwlock);
2031 if (!snd_pcm_stream_linked(substream)) {
2032 res = -EALREADY;
2033 goto _end;
2034 }
a41c4cb9
TI		 2035
2036 group = substream->group;
2037
2038 relink_to_local(substream);
2039
2040 /* detach the last stream, too */
2041 if (list_is_singular(&group->substreams)) {
7df5a5f6
TI		 2042 relink_to_local(list_first_entry(&group->substreams,
2043 struct snd_pcm_substream,
2044 link_list));
a41c4cb9 2045 kfree(group);
1da177e4 2046 }
a41c4cb9 2047
1da177e4
LT		 2048 _end:
2049 write_unlock_irq(&snd_pcm_link_rwlock);
2050 up_write(&snd_pcm_link_rwsem);
2051 return res;
2052}
2053
2054/*
2055 * hw configurator
2056 */
877211f5
TI		 2057static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
2058 struct snd_pcm_hw_rule *rule)
1da177e4 2059{
877211f5 2060 struct snd_interval t;
1da177e4
LT		 2061 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
2062 hw_param_interval_c(params, rule->deps[1]), &t);
2063 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2064}
2065
877211f5
TI		 2066static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
2067 struct snd_pcm_hw_rule *rule)
1da177e4 2068{
877211f5 2069 struct snd_interval t;
1da177e4
LT		 2070 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
2071 hw_param_interval_c(params, rule->deps[1]), &t);
2072 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2073}
2074
877211f5
TI		 2075static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
2076 struct snd_pcm_hw_rule *rule)
1da177e4 2077{
877211f5 2078 struct snd_interval t;
1da177e4
LT		 2079 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
2080 hw_param_interval_c(params, rule->deps[1]),
2081 (unsigned long) rule->private, &t);
2082 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2083}
2084
877211f5
TI		 2085static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
2086 struct snd_pcm_hw_rule *rule)
1da177e4 2087{
877211f5 2088 struct snd_interval t;
1da177e4
LT		 2089 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
2090 (unsigned long) rule->private,
2091 hw_param_interval_c(params, rule->deps[1]), &t);
2092 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2093}
2094
877211f5
TI		 2095static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
2096 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 2097{
2098 unsigned int k;
b55f9fdc
TS		 2099 const struct snd_interval *i =
2100 hw_param_interval_c(params, rule->deps[0]);
877211f5
TI		 2101 struct snd_mask m;
2102 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 2103 snd_mask_any(&m);
2104 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2105 int bits;
2106 if (! snd_mask_test(mask, k))
2107 continue;
2108 bits = snd_pcm_format_physical_width(k);
2109 if (bits <= 0)
2110 continue; /* ignore invalid formats */
2111 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
2112 snd_mask_reset(&m, k);
2113 }
2114 return snd_mask_refine(mask, &m);
2115}
2116
877211f5
TI		 2117static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
2118 struct snd_pcm_hw_rule *rule)
1da177e4 2119{
877211f5 2120 struct snd_interval t;
1da177e4
LT		 2121 unsigned int k;
2122 t.min = UINT_MAX;
2123 t.max = 0;
2124 t.openmin = 0;
2125 t.openmax = 0;
2126 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2127 int bits;
2128 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
2129 continue;
2130 bits = snd_pcm_format_physical_width(k);
2131 if (bits <= 0)
2132 continue; /* ignore invalid formats */
2133 if (t.min > (unsigned)bits)
2134 t.min = bits;
2135 if (t.max < (unsigned)bits)
2136 t.max = bits;
2137 }
2138 t.integer = 1;
2139 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2140}
2141
2142#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
2143#error "Change this table"
2144#endif
2145
8b674308
TS		 2146static const unsigned int rates[] = {
2147 5512, 8000, 11025, 16000, 22050, 32000, 44100,
2148 48000, 64000, 88200, 96000, 176400, 192000
2149};
1da177e4 2150
7653d557
CL		 2151const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
2152 .count = ARRAY_SIZE(rates),
2153 .list = rates,
2154};
2155
877211f5
TI		 2156static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
2157 struct snd_pcm_hw_rule *rule)
1da177e4 2158{
877211f5 2159 struct snd_pcm_hardware *hw = rule->private;
1da177e4 2160 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 2161 snd_pcm_known_rates.count,
2162 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 2163}
2164
877211f5
TI		 2165static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2166 struct snd_pcm_hw_rule *rule)
1da177e4 2167{
877211f5
TI		 2168 struct snd_interval t;
2169 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 2170 t.min = 0;
2171 t.max = substream->buffer_bytes_max;
2172 t.openmin = 0;
2173 t.openmax = 0;
2174 t.integer = 1;
2175 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2176}
2177
877211f5 2178int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 2179{
877211f5
TI		 2180 struct snd_pcm_runtime *runtime = substream->runtime;
2181 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 2182 int k, err;
2183
2184 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2185 snd_mask_any(constrs_mask(constrs, k));
2186 }
2187
2188 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2189 snd_interval_any(constrs_interval(constrs, k));
2190 }
2191
2192 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2193 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2194 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2195 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2196 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2197
2198 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2199 snd_pcm_hw_rule_format, NULL,
2200 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2201 if (err < 0)
2202 return err;
2203 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2204 snd_pcm_hw_rule_sample_bits, NULL,
2205 SNDRV_PCM_HW_PARAM_FORMAT,
2206 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2207 if (err < 0)
2208 return err;
2209 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2210 snd_pcm_hw_rule_div, NULL,
2211 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2212 if (err < 0)
2213 return err;
2214 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2215 snd_pcm_hw_rule_mul, NULL,
2216 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2217 if (err < 0)
2218 return err;
2219 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2220 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2221 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2222 if (err < 0)
2223 return err;
2224 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2225 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2226 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2227 if (err < 0)
2228 return err;
2229 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2230 snd_pcm_hw_rule_div, NULL,
2231 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2232 if (err < 0)
2233 return err;
2234 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2235 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2236 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2237 if (err < 0)
2238 return err;
2239 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2240 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2241 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2242 if (err < 0)
2243 return err;
2244 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2245 snd_pcm_hw_rule_div, NULL,
2246 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2247 if (err < 0)
2248 return err;
2249 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2250 snd_pcm_hw_rule_div, NULL,
2251 SNDRV_PCM_HW_PARAM_BUFFER_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_PERIOD_SIZE,
2255 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2256 SNDRV_PCM_HW_PARAM_PERIOD_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_PERIOD_SIZE,
2260 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2261 SNDRV_PCM_HW_PARAM_PERIOD_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_BUFFER_SIZE,
2265 snd_pcm_hw_rule_mul, NULL,
2266 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2267 if (err < 0)
2268 return err;
2269 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2270 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2271 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 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_BUFFER_SIZE,
2275 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2276 SNDRV_PCM_HW_PARAM_BUFFER_TIME, 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_PERIOD_BYTES,
2280 snd_pcm_hw_rule_muldivk, (void*) 8,
2281 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2282 if (err < 0)
2283 return err;
2284 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2285 snd_pcm_hw_rule_muldivk, (void*) 8,
2286 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2287 if (err < 0)
2288 return err;
2289 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2290 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2291 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2292 if (err < 0)
2293 return err;
2294 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2295 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2296 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2297 if (err < 0)
2298 return err;
2299 return 0;
2300}
2301
877211f5 2302int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 2303{
877211f5
TI		 2304 struct snd_pcm_runtime *runtime = substream->runtime;
2305 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 2306 int err;
2307 unsigned int mask = 0;
2308
2309 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2310 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2311 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2312 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
63825f3a 2313 if (hw_support_mmap(substream)) {
1da177e4
LT		 2314 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2315 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2316 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2317 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2318 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2319 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2320 }
2321 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 2322 if (err < 0)
2323 return err;
1da177e4
LT		 2324
2325 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 2326 if (err < 0)
2327 return err;
1da177e4
LT		 2328
2329 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 2330 if (err < 0)
2331 return err;
1da177e4
LT		 2332
2333 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2334 hw->channels_min, hw->channels_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_RATE,
2339 hw->rate_min, hw->rate_max);
8b90ca08
GL		 2340 if (err < 0)
2341 return err;
1da177e4
LT		 2342
2343 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2344 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 2345 if (err < 0)
2346 return err;
1da177e4
LT		 2347
2348 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2349 hw->periods_min, hw->periods_max);
7eaa943c
TI		 2350 if (err < 0)
2351 return err;
1da177e4
LT		 2352
2353 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2354 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 2355 if (err < 0)
2356 return err;
1da177e4
LT		 2357
2358 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2359 snd_pcm_hw_rule_buffer_bytes_max, substream,
2360 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2361 if (err < 0)
2362 return err;
2363
2364 /* FIXME: remove */
2365 if (runtime->dma_bytes) {
2366 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c 2367 if (err < 0)
6cf95152 2368 return err;
1da177e4
LT		 2369 }
2370
2371 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2372 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2373 snd_pcm_hw_rule_rate, hw,
2374 SNDRV_PCM_HW_PARAM_RATE, -1);
2375 if (err < 0)
2376 return err;
2377 }
2378
2379 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2380 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2381
2382 return 0;
2383}
2384
3bf75f9b 2385static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2386{
b51abed8
TI		 2387 if (snd_pcm_stream_linked(substream))
2388 snd_pcm_unlink(substream);
3bf75f9b
TI		 2389}
2390
2391void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2392{
0df63e44
TI		 2393 substream->ref_count--;
2394 if (substream->ref_count > 0)
2395 return;
2396
3bf75f9b 2397 snd_pcm_drop(substream);
3bf75f9b 2398 if (substream->hw_opened) {
094435d4
TI		 2399 if (substream->ops->hw_free &&
2400 substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
1da177e4
LT		 2401 substream->ops->hw_free(substream);
2402 substream->ops->close(substream);
3bf75f9b 2403 substream->hw_opened = 0;
1da177e4 2404 }
8699a0b6
TI		 2405 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2406 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2407 if (substream->pcm_release) {
2408 substream->pcm_release(substream);
2409 substream->pcm_release = NULL;
2410 }
3bf75f9b
TI		 2411 snd_pcm_detach_substream(substream);
2412}
e88e8ae6
TI		 2413EXPORT_SYMBOL(snd_pcm_release_substream);
2414
3bf75f9b
TI		 2415int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2416 struct file *file,
2417 struct snd_pcm_substream **rsubstream)
2418{
2419 struct snd_pcm_substream *substream;
2420 int err;
2421
2422 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2423 if (err < 0)
2424 return err;
0df63e44
TI		 2425 if (substream->ref_count > 1) {
2426 *rsubstream = substream;
2427 return 0;
2428 }
2429
3bf75f9b
TI		 2430 err = snd_pcm_hw_constraints_init(substream);
2431 if (err < 0) {
09e56df8 2432 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
3bf75f9b
TI		 2433 goto error;
2434 }
2435
2436 if ((err = substream->ops->open(substream)) < 0)
2437 goto error;
2438
2439 substream->hw_opened = 1;
2440
2441 err = snd_pcm_hw_constraints_complete(substream);
2442 if (err < 0) {
09e56df8 2443 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
3bf75f9b
TI		 2444 goto error;
2445 }
2446
2447 *rsubstream = substream;
1da177e4 2448 return 0;
3bf75f9b
TI		 2449
2450 error:
2451 snd_pcm_release_substream(substream);
2452 return err;
1da177e4 2453}
e88e8ae6
TI		 2454EXPORT_SYMBOL(snd_pcm_open_substream);
2455
1da177e4 2456static int snd_pcm_open_file(struct file *file,
877211f5 2457 struct snd_pcm *pcm,
ffd3d5c6 2458 int stream)
1da177e4 2459{
877211f5
TI		 2460 struct snd_pcm_file *pcm_file;
2461 struct snd_pcm_substream *substream;
3bf75f9b 2462 int err;
1da177e4 2463
3bf75f9b
TI		 2464 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2465 if (err < 0)
2466 return err;
2467
548a648b
TI		 2468 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2469 if (pcm_file == NULL) {
2470 snd_pcm_release_substream(substream);
2471 return -ENOMEM;
2472 }
2473 pcm_file->substream = substream;
2474 if (substream->ref_count == 1) {
0df63e44
TI		 2475 substream->file = pcm_file;
2476 substream->pcm_release = pcm_release_private;
1da177e4 2477 }
1da177e4 2478 file->private_data = pcm_file;
ffd3d5c6 2479
1da177e4
LT		 2480 return 0;
2481}
2482
f87135f5
CL		 2483static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2484{
2485 struct snd_pcm *pcm;
02f4865f
TI		 2486 int err = nonseekable_open(inode, file);
2487 if (err < 0)
2488 return err;
f87135f5
CL		 2489 pcm = snd_lookup_minor_data(iminor(inode),
2490 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd 2491 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
8bb4d9ce
TI		 2492 if (pcm)
2493 snd_card_unref(pcm->card);
a0830dbd 2494 return err;
f87135f5
CL		 2495}
2496
2497static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2498{
877211f5 2499 struct snd_pcm *pcm;
02f4865f
TI		 2500 int err = nonseekable_open(inode, file);
2501 if (err < 0)
2502 return err;
f87135f5
CL		 2503 pcm = snd_lookup_minor_data(iminor(inode),
2504 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd 2505 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
8bb4d9ce
TI		 2506 if (pcm)
2507 snd_card_unref(pcm->card);
a0830dbd 2508 return err;
f87135f5
CL		 2509}
2510
2511static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2512{
2513 int err;
ac6424b9 2514 wait_queue_entry_t wait;
1da177e4 2515
1da177e4
LT		 2516 if (pcm == NULL) {
2517 err = -ENODEV;
2518 goto __error1;
2519 }
2520 err = snd_card_file_add(pcm->card, file);
2521 if (err < 0)
2522 goto __error1;
2523 if (!try_module_get(pcm->card->module)) {
2524 err = -EFAULT;
2525 goto __error2;
2526 }
2527 init_waitqueue_entry(&wait, current);
2528 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2529 mutex_lock(&pcm->open_mutex);
1da177e4 2530 while (1) {
ffd3d5c6 2531 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2532 if (err >= 0)
2533 break;
2534 if (err == -EAGAIN) {
2535 if (file->f_flags & O_NONBLOCK) {
2536 err = -EBUSY;
2537 break;
2538 }
2539 } else
2540 break;
2541 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2542 mutex_unlock(&pcm->open_mutex);
1da177e4 2543 schedule();
1a60d4c5 2544 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2545 if (pcm->card->shutdown) {
2546 err = -ENODEV;
2547 break;
2548 }
1da177e4
LT		 2549 if (signal_pending(current)) {
2550 err = -ERESTARTSYS;
2551 break;
2552 }
2553 }
2554 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2555 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2556 if (err < 0)
2557 goto __error;
2558 return err;
2559
2560 __error:
2561 module_put(pcm->card->module);
2562 __error2:
2563 snd_card_file_remove(pcm->card, file);
2564 __error1:
2565 return err;
2566}
2567
2568static int snd_pcm_release(struct inode *inode, struct file *file)
2569{
877211f5
TI		 2570 struct snd_pcm *pcm;
2571 struct snd_pcm_substream *substream;
2572 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2573
2574 pcm_file = file->private_data;
2575 substream = pcm_file->substream;
7eaa943c
TI		 2576 if (snd_BUG_ON(!substream))
2577 return -ENXIO;
1da177e4 2578 pcm = substream->pcm;
1a60d4c5 2579 mutex_lock(&pcm->open_mutex);
3bf75f9b 2580 snd_pcm_release_substream(substream);
548a648b 2581 kfree(pcm_file);
1a60d4c5 2582 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2583 wake_up(&pcm->open_wait);
2584 module_put(pcm->card->module);
2585 snd_card_file_remove(pcm->card, file);
2586 return 0;
2587}
2588
f839cc1c
TI		 2589/* check and update PCM state; return 0 or a negative error
2590 * call this inside PCM lock
2591 */
2592static int do_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2593{
f839cc1c 2594 switch (substream->runtime->status->state) {
1da177e4 2595 case SNDRV_PCM_STATE_DRAINING:
f839cc1c
TI		 2596 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2597 return -EBADFD;
1da177e4 2598 /* Fall through */
f839cc1c
TI		 2599 case SNDRV_PCM_STATE_RUNNING:
2600 return snd_pcm_update_hw_ptr(substream);
2601 case SNDRV_PCM_STATE_PREPARED:
2602 case SNDRV_PCM_STATE_PAUSED:
2603 return 0;
51840409 2604 case SNDRV_PCM_STATE_SUSPENDED:
f839cc1c
TI		 2605 return -ESTRPIPE;
2606 case SNDRV_PCM_STATE_XRUN:
2607 return -EPIPE;
1da177e4 2608 default:
f839cc1c 2609 return -EBADFD;
1da177e4 2610 }
f839cc1c 2611}
1da177e4 2612
9027c463 2613/* increase the appl_ptr; returns the processed frames or a negative error */
e0327a0f
TI		 2614static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
2615 snd_pcm_uframes_t frames,
2616 snd_pcm_sframes_t avail)
2617{
2618 struct snd_pcm_runtime *runtime = substream->runtime;
2619 snd_pcm_sframes_t appl_ptr;
9027c463 2620 int ret;
e0327a0f
TI		 2621
2622 if (avail <= 0)
2623 return 0;
2624 if (frames > (snd_pcm_uframes_t)avail)
2625 frames = avail;
2626 appl_ptr = runtime->control->appl_ptr + frames;
2627 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2628 appl_ptr -= runtime->boundary;
66e01a5c 2629 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
9027c463 2630 return ret < 0 ? ret : frames;
e0327a0f
TI		 2631}
2632
fb51f1cd 2633/* decrease the appl_ptr; returns the processed frames or zero for error */
e0327a0f
TI		 2634static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
2635 snd_pcm_uframes_t frames,
2636 snd_pcm_sframes_t avail)
2637{
2638 struct snd_pcm_runtime *runtime = substream->runtime;
2639 snd_pcm_sframes_t appl_ptr;
9027c463 2640 int ret;
e0327a0f
TI		 2641
2642 if (avail <= 0)
2643 return 0;
2644 if (frames > (snd_pcm_uframes_t)avail)
2645 frames = avail;
1da177e4
LT		 2646 appl_ptr = runtime->control->appl_ptr - frames;
2647 if (appl_ptr < 0)
2648 appl_ptr += runtime->boundary;
66e01a5c 2649 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
fb51f1cd
TI		 2650 /* NOTE: we return zero for errors because PulseAudio gets depressed
2651 * upon receiving an error from rewind ioctl and stops processing
2652 * any longer. Returning zero means that no rewind is done, so
2653 * it's not absolutely wrong to answer like that.
2654 */
2655 return ret < 0 ? 0 : frames;
e0327a0f
TI		 2656}
2657
763e5067
TI		 2658static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream,
2659 snd_pcm_uframes_t frames)
1da177e4 2660{
1da177e4 2661 snd_pcm_sframes_t ret;
1da177e4
LT		 2662
2663 if (frames == 0)
2664 return 0;
2665
2666 snd_pcm_stream_lock_irq(substream);
f839cc1c 2667 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2668 if (!ret)
2669 ret = rewind_appl_ptr(substream, frames,
763e5067 2670 snd_pcm_hw_avail(substream));
1da177e4
LT		 2671 snd_pcm_stream_unlock_irq(substream);
2672 return ret;
2673}
2674
763e5067
TI		 2675static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream,
2676 snd_pcm_uframes_t frames)
1da177e4 2677{
1da177e4 2678 snd_pcm_sframes_t ret;
1da177e4
LT		 2679
2680 if (frames == 0)
2681 return 0;
2682
2683 snd_pcm_stream_lock_irq(substream);
f839cc1c 2684 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2685 if (!ret)
2686 ret = forward_appl_ptr(substream, frames,
763e5067 2687 snd_pcm_avail(substream));
1da177e4
LT		 2688 snd_pcm_stream_unlock_irq(substream);
2689 return ret;
2690}
2691
877211f5 2692static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2693{
1da177e4
LT		 2694 int err;
2695
2696 snd_pcm_stream_lock_irq(substream);
f839cc1c 2697 err = do_pcm_hwsync(substream);
1da177e4
LT		 2698 snd_pcm_stream_unlock_irq(substream);
2699 return err;
2700}
2701
912e4c33
JM		 2702static int snd_pcm_delay(struct snd_pcm_substream *substream,
2703 snd_pcm_sframes_t *delay)
1da177e4 2704{
1da177e4
LT		 2705 int err;
2706 snd_pcm_sframes_t n = 0;
2707
2708 snd_pcm_stream_lock_irq(substream);
f839cc1c 2709 err = do_pcm_hwsync(substream);
c99c5a3b
TI		 2710 if (!err)
2711 n = snd_pcm_calc_delay(substream);
1da177e4 2712 snd_pcm_stream_unlock_irq(substream);
912e4c33
JM		 2713 if (!err)
2714 *delay = n;
2715 return err;
1da177e4
LT		 2716}
2717
877211f5
TI		 2718static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2719 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2720{
877211f5
TI		 2721 struct snd_pcm_runtime *runtime = substream->runtime;
2722 struct snd_pcm_sync_ptr sync_ptr;
2723 volatile struct snd_pcm_mmap_status *status;
2724 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2725 int err;
2726
2727 memset(&sync_ptr, 0, sizeof(sync_ptr));
2728 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2729 return -EFAULT;
877211f5 2730 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2731 return -EFAULT;
2732 status = runtime->status;
2733 control = runtime->control;
2734 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2735 err = snd_pcm_hwsync(substream);
2736 if (err < 0)
2737 return err;
2738 }
2739 snd_pcm_stream_lock_irq(substream);
9027c463 2740 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
66e01a5c
TS		 2741 err = pcm_lib_apply_appl_ptr(substream,
2742 sync_ptr.c.control.appl_ptr);
9027c463
TI		 2743 if (err < 0) {
2744 snd_pcm_stream_unlock_irq(substream);
2745 return err;
2746 }
2747 } else {
1da177e4 2748 sync_ptr.c.control.appl_ptr = control->appl_ptr;
9027c463 2749 }
1da177e4
LT		 2750 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2751 control->avail_min = sync_ptr.c.control.avail_min;
2752 else
2753 sync_ptr.c.control.avail_min = control->avail_min;
2754 sync_ptr.s.status.state = status->state;
2755 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2756 sync_ptr.s.status.tstamp = status->tstamp;
2757 sync_ptr.s.status.suspended_state = status->suspended_state;
f853dcaa 2758 sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
1da177e4
LT		 2759 snd_pcm_stream_unlock_irq(substream);
2760 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2761 return -EFAULT;
2762 return 0;
2763}
b751eef1
JK		 2764
2765static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2766{
2767 struct snd_pcm_runtime *runtime = substream->runtime;
2768 int arg;
2769
2770 if (get_user(arg, _arg))
2771 return -EFAULT;
2772 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2773 return -EINVAL;
2408c219 2774 runtime->tstamp_type = arg;
b751eef1
JK		 2775 return 0;
2776}
67616fed
TI		 2777
2778static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream,
2779 struct snd_xferi __user *_xferi)
2780{
2781 struct snd_xferi xferi;
2782 struct snd_pcm_runtime *runtime = substream->runtime;
2783 snd_pcm_sframes_t result;
2784
2785 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2786 return -EBADFD;
2787 if (put_user(0, &_xferi->result))
2788 return -EFAULT;
2789 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2790 return -EFAULT;
2791 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2792 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2793 else
2794 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2795 __put_user(result, &_xferi->result);
2796 return result < 0 ? result : 0;
2797}
2798
2799static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
2800 struct snd_xfern __user *_xfern)
2801{
2802 struct snd_xfern xfern;
2803 struct snd_pcm_runtime *runtime = substream->runtime;
2804 void *bufs;
2805 snd_pcm_sframes_t result;
2806
2807 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2808 return -EBADFD;
2809 if (runtime->channels > 128)
2810 return -EINVAL;
2811 if (put_user(0, &_xfern->result))
2812 return -EFAULT;
2813 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2814 return -EFAULT;
2815
2816 bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
2817 if (IS_ERR(bufs))
2818 return PTR_ERR(bufs);
2819 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2820 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2821 else
2822 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2823 kfree(bufs);
2824 __put_user(result, &_xfern->result);
2825 return result < 0 ? result : 0;
2826}
2827
2828static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream,
2829 snd_pcm_uframes_t __user *_frames)
2830{
2831 snd_pcm_uframes_t frames;
2832 snd_pcm_sframes_t result;
2833
2834 if (get_user(frames, _frames))
2835 return -EFAULT;
2836 if (put_user(0, _frames))
2837 return -EFAULT;
763e5067 2838 result = snd_pcm_rewind(substream, frames);
67616fed
TI		 2839 __put_user(result, _frames);
2840 return result < 0 ? result : 0;
2841}
2842
2843static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream,
2844 snd_pcm_uframes_t __user *_frames)
2845{
2846 snd_pcm_uframes_t frames;
2847 snd_pcm_sframes_t result;
2848
2849 if (get_user(frames, _frames))
2850 return -EFAULT;
2851 if (put_user(0, _frames))
2852 return -EFAULT;
763e5067 2853 result = snd_pcm_forward(substream, frames);
67616fed
TI		 2854 __put_user(result, _frames);
2855 return result < 0 ? result : 0;
2856}
2857
2858static int snd_pcm_common_ioctl(struct file *file,
0df63e44 2859 struct snd_pcm_substream *substream,
1da177e4
LT		 2860 unsigned int cmd, void __user *arg)
2861{
4b671f57 2862 struct snd_pcm_file *pcm_file = file->private_data;
7d8e8292
TI		 2863 int res;
2864
67616fed
TI		 2865 if (PCM_RUNTIME_CHECK(substream))
2866 return -ENXIO;
2867
7d8e8292
TI		 2868 res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0);
2869 if (res < 0)
2870 return res;
4b671f57 2871
1da177e4
LT		 2872 switch (cmd) {
2873 case SNDRV_PCM_IOCTL_PVERSION:
2874 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2875 case SNDRV_PCM_IOCTL_INFO:
2876 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2877 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2878 return 0;
b751eef1
JK		 2879 case SNDRV_PCM_IOCTL_TTSTAMP:
2880 return snd_pcm_tstamp(substream, arg);
4b671f57
TI		 2881 case SNDRV_PCM_IOCTL_USER_PVERSION:
2882 if (get_user(pcm_file->user_pversion,
2883 (unsigned int __user *)arg))
2884 return -EFAULT;
2885 return 0;
1da177e4
LT		 2886 case SNDRV_PCM_IOCTL_HW_REFINE:
2887 return snd_pcm_hw_refine_user(substream, arg);
2888 case SNDRV_PCM_IOCTL_HW_PARAMS:
2889 return snd_pcm_hw_params_user(substream, arg);
2890 case SNDRV_PCM_IOCTL_HW_FREE:
2891 return snd_pcm_hw_free(substream);
2892 case SNDRV_PCM_IOCTL_SW_PARAMS:
2893 return snd_pcm_sw_params_user(substream, arg);
2894 case SNDRV_PCM_IOCTL_STATUS:
38ca2a4d
PLB		 2895 return snd_pcm_status_user(substream, arg, false);
2896 case SNDRV_PCM_IOCTL_STATUS_EXT:
2897 return snd_pcm_status_user(substream, arg, true);
1da177e4
LT		 2898 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2899 return snd_pcm_channel_info_user(substream, arg);
2900 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2901 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2902 case SNDRV_PCM_IOCTL_RESET:
2903 return snd_pcm_reset(substream);
2904 case SNDRV_PCM_IOCTL_START:
c2c86a97 2905 return snd_pcm_start_lock_irq(substream);
1da177e4
LT		 2906 case SNDRV_PCM_IOCTL_LINK:
2907 return snd_pcm_link(substream, (int)(unsigned long) arg);
2908 case SNDRV_PCM_IOCTL_UNLINK:
2909 return snd_pcm_unlink(substream);
2910 case SNDRV_PCM_IOCTL_RESUME:
2911 return snd_pcm_resume(substream);
2912 case SNDRV_PCM_IOCTL_XRUN:
2913 return snd_pcm_xrun(substream);
2914 case SNDRV_PCM_IOCTL_HWSYNC:
2915 return snd_pcm_hwsync(substream);
2916 case SNDRV_PCM_IOCTL_DELAY:
c2c86a97 2917 {
912e4c33 2918 snd_pcm_sframes_t delay;
c2c86a97 2919 snd_pcm_sframes_t __user *res = arg;
912e4c33 2920 int err;
c2c86a97 2921
912e4c33
JM		 2922 err = snd_pcm_delay(substream, &delay);
2923 if (err)
2924 return err;
c2c86a97
TI		 2925 if (put_user(delay, res))
2926 return -EFAULT;
2927 return 0;
2928 }
1da177e4
LT		 2929 case SNDRV_PCM_IOCTL_SYNC_PTR:
2930 return snd_pcm_sync_ptr(substream, arg);
59d48582 2931#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2932 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2933 return snd_pcm_hw_refine_old_user(substream, arg);
2934 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2935 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2936#endif
1da177e4 2937 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2938 return snd_pcm_drain(substream, file);
1da177e4
LT		 2939 case SNDRV_PCM_IOCTL_DROP:
2940 return snd_pcm_drop(substream);
e661d0dd 2941 case SNDRV_PCM_IOCTL_PAUSE:
34bcc44a
TI		 2942 return snd_pcm_action_lock_irq(&snd_pcm_action_pause,
2943 substream,
2944 (int)(unsigned long)arg);
1da177e4 2945 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
1da177e4 2946 case SNDRV_PCM_IOCTL_READI_FRAMES:
67616fed
TI		 2947 return snd_pcm_xferi_frames_ioctl(substream, arg);
2948 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
1da177e4 2949 case SNDRV_PCM_IOCTL_READN_FRAMES:
67616fed 2950 return snd_pcm_xfern_frames_ioctl(substream, arg);
1da177e4 2951 case SNDRV_PCM_IOCTL_REWIND:
67616fed 2952 return snd_pcm_rewind_ioctl(substream, arg);
1da177e4 2953 case SNDRV_PCM_IOCTL_FORWARD:
67616fed 2954 return snd_pcm_forward_ioctl(substream, arg);
1da177e4 2955 }
67616fed
TI		 2956 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2957 return -ENOTTY;
1da177e4
LT		 2958}
2959
67616fed
TI		 2960static long snd_pcm_ioctl(struct file *file, unsigned int cmd,
2961 unsigned long arg)
1da177e4 2962{
877211f5 2963 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2964
2965 pcm_file = file->private_data;
2966
2967 if (((cmd >> 8) & 0xff) != 'A')
2968 return -ENOTTY;
2969
67616fed
TI		 2970 return snd_pcm_common_ioctl(file, pcm_file->substream, cmd,
2971 (void __user *)arg);
1da177e4
LT		 2972}
2973
c2c86a97
TI		 2974/**
2975 * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space
2976 * @substream: PCM substream
2977 * @cmd: IOCTL cmd
2978 * @arg: IOCTL argument
2979 *
2980 * The function is provided primarily for OSS layer and USB gadget drivers,
2981 * and it allows only the limited set of ioctls (hw_params, sw_params,
2982 * prepare, start, drain, drop, forward).
2983 */
bf1bbb5a
TI		 2984int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2985 unsigned int cmd, void *arg)
1da177e4 2986{
c2c86a97
TI		 2987 snd_pcm_uframes_t *frames = arg;
2988 snd_pcm_sframes_t result;
1da177e4 2989
c2c86a97
TI		 2990 switch (cmd) {
2991 case SNDRV_PCM_IOCTL_FORWARD:
2992 {
2993 /* provided only for OSS; capture-only and no value returned */
2994 if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
2995 return -EINVAL;
763e5067 2996 result = snd_pcm_forward(substream, *frames);
c2c86a97
TI		 2997 return result < 0 ? result : 0;
2998 }
2999 case SNDRV_PCM_IOCTL_HW_PARAMS:
3000 return snd_pcm_hw_params(substream, arg);
3001 case SNDRV_PCM_IOCTL_SW_PARAMS:
3002 return snd_pcm_sw_params(substream, arg);
3003 case SNDRV_PCM_IOCTL_PREPARE:
3004 return snd_pcm_prepare(substream, NULL);
3005 case SNDRV_PCM_IOCTL_START:
3006 return snd_pcm_start_lock_irq(substream);
3007 case SNDRV_PCM_IOCTL_DRAIN:
7d8e8292 3008 return snd_pcm_drain(substream, NULL);
c2c86a97
TI		 3009 case SNDRV_PCM_IOCTL_DROP:
3010 return snd_pcm_drop(substream);
3011 case SNDRV_PCM_IOCTL_DELAY:
912e4c33 3012 return snd_pcm_delay(substream, frames);
1da177e4 3013 default:
c2c86a97 3014 return -EINVAL;
1da177e4
LT		 3015 }
3016}
e88e8ae6
TI		 3017EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3018
877211f5
TI		 3019static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3020 loff_t * offset)
1da177e4 3021{
877211f5
TI		 3022 struct snd_pcm_file *pcm_file;
3023 struct snd_pcm_substream *substream;
3024 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3025 snd_pcm_sframes_t result;
3026
3027 pcm_file = file->private_data;
3028 substream = pcm_file->substream;
7eaa943c
TI		 3029 if (PCM_RUNTIME_CHECK(substream))
3030 return -ENXIO;
1da177e4
LT		 3031 runtime = substream->runtime;
3032 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3033 return -EBADFD;
3034 if (!frame_aligned(runtime, count))
3035 return -EINVAL;
3036 count = bytes_to_frames(runtime, count);
3037 result = snd_pcm_lib_read(substream, buf, count);
3038 if (result > 0)
3039 result = frames_to_bytes(runtime, result);
3040 return result;
3041}
3042
877211f5
TI		 3043static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3044 size_t count, loff_t * offset)
1da177e4 3045{
877211f5
TI		 3046 struct snd_pcm_file *pcm_file;
3047 struct snd_pcm_substream *substream;
3048 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3049 snd_pcm_sframes_t result;
3050
3051 pcm_file = file->private_data;
3052 substream = pcm_file->substream;
7eaa943c
TI		 3053 if (PCM_RUNTIME_CHECK(substream))
3054 return -ENXIO;
1da177e4 3055 runtime = substream->runtime;
7eaa943c
TI		 3056 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3057 return -EBADFD;
3058 if (!frame_aligned(runtime, count))
3059 return -EINVAL;
1da177e4
LT		 3060 count = bytes_to_frames(runtime, count);
3061 result = snd_pcm_lib_write(substream, buf, count);
3062 if (result > 0)
3063 result = frames_to_bytes(runtime, result);
1da177e4
LT		 3064 return result;
3065}
3066
1c65d986 3067static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
1da177e4 3068{
877211f5
TI		 3069 struct snd_pcm_file *pcm_file;
3070 struct snd_pcm_substream *substream;
3071 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3072 snd_pcm_sframes_t result;
3073 unsigned long i;
3074 void __user **bufs;
3075 snd_pcm_uframes_t frames;
3076
ee0b3e67 3077 pcm_file = iocb->ki_filp->private_data;
1da177e4 3078 substream = pcm_file->substream;
7eaa943c
TI		 3079 if (PCM_RUNTIME_CHECK(substream))
3080 return -ENXIO;
1da177e4
LT		 3081 runtime = substream->runtime;
3082 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3083 return -EBADFD;
1c65d986
AV		 3084 if (!iter_is_iovec(to))
3085 return -EINVAL;
3086 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
1da177e4 3087 return -EINVAL;
1c65d986 3088 if (!frame_aligned(runtime, to->iov->iov_len))
1da177e4 3089 return -EINVAL;
1c65d986 3090 frames = bytes_to_samples(runtime, to->iov->iov_len);
6da2ec56 3091 bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL);
1da177e4
LT		 3092 if (bufs == NULL)
3093 return -ENOMEM;
1c65d986
AV		 3094 for (i = 0; i < to->nr_segs; ++i)
3095 bufs[i] = to->iov[i].iov_base;
1da177e4
LT		 3096 result = snd_pcm_lib_readv(substream, bufs, frames);
3097 if (result > 0)
3098 result = frames_to_bytes(runtime, result);
3099 kfree(bufs);
3100 return result;
3101}
3102
1c65d986 3103static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
1da177e4 3104{
877211f5
TI		 3105 struct snd_pcm_file *pcm_file;
3106 struct snd_pcm_substream *substream;
3107 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3108 snd_pcm_sframes_t result;
3109 unsigned long i;
3110 void __user **bufs;
3111 snd_pcm_uframes_t frames;
3112
ee0b3e67 3113 pcm_file = iocb->ki_filp->private_data;
1da177e4 3114 substream = pcm_file->substream;
7eaa943c
TI		 3115 if (PCM_RUNTIME_CHECK(substream))
3116 return -ENXIO;
1da177e4 3117 runtime = substream->runtime;
7eaa943c
TI		 3118 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3119 return -EBADFD;
1c65d986
AV		 3120 if (!iter_is_iovec(from))
3121 return -EINVAL;
3122 if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
3123 !frame_aligned(runtime, from->iov->iov_len))
7eaa943c 3124 return -EINVAL;
1c65d986 3125 frames = bytes_to_samples(runtime, from->iov->iov_len);
6da2ec56 3126 bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL);
1da177e4
LT		 3127 if (bufs == NULL)
3128 return -ENOMEM;
1c65d986
AV		 3129 for (i = 0; i < from->nr_segs; ++i)
3130 bufs[i] = from->iov[i].iov_base;
1da177e4
LT		 3131 result = snd_pcm_lib_writev(substream, bufs, frames);
3132 if (result > 0)
3133 result = frames_to_bytes(runtime, result);
3134 kfree(bufs);
1da177e4
LT		 3135 return result;
3136}
3137
6448fcba 3138static __poll_t snd_pcm_poll(struct file *file, poll_table *wait)
1da177e4 3139{
877211f5
TI		 3140 struct snd_pcm_file *pcm_file;
3141 struct snd_pcm_substream *substream;
3142 struct snd_pcm_runtime *runtime;
6448fcba 3143 __poll_t mask, ok;
1da177e4
LT		 3144 snd_pcm_uframes_t avail;
3145
3146 pcm_file = file->private_data;
3147
3148 substream = pcm_file->substream;
6448fcba
TI		 3149 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3150 ok = EPOLLOUT | EPOLLWRNORM;
3151 else
3152 ok = EPOLLIN | EPOLLRDNORM;
7eaa943c 3153 if (PCM_RUNTIME_CHECK(substream))
6448fcba 3154 return ok | EPOLLERR;
1da177e4 3155
1da177e4 3156 runtime = substream->runtime;
1da177e4
LT		 3157 poll_wait(file, &runtime->sleep, wait);
3158
6448fcba 3159 mask = 0;
1da177e4 3160 snd_pcm_stream_lock_irq(substream);
6448fcba 3161 avail = snd_pcm_avail(substream);
1da177e4
LT		 3162 switch (runtime->status->state) {
3163 case SNDRV_PCM_STATE_RUNNING:
3164 case SNDRV_PCM_STATE_PREPARED:
3165 case SNDRV_PCM_STATE_PAUSED:
6448fcba
TI		 3166 if (avail >= runtime->control->avail_min)
3167 mask = ok;
1da177e4
LT		 3168 break;
3169 case SNDRV_PCM_STATE_DRAINING:
6448fcba
TI		 3170 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
3171 mask = ok;
3172 if (!avail)
3173 mask |= EPOLLERR;
1da177e4 3174 }
6448fcba 3175 break;
1da177e4 3176 default:
6448fcba 3177 mask = ok | EPOLLERR;
1da177e4
LT		 3178 break;
3179 }
3180 snd_pcm_stream_unlock_irq(substream);
3181 return mask;
3182}
3183
3184/*
3185 * mmap support
3186 */
3187
3188/*
3189 * Only on coherent architectures, we can mmap the status and the control records
3190 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3191 */
3192#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3193/*
3194 * mmap status record
3195 */
41412fe9 3196static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf)
1da177e4 3197{
11bac800 3198 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3199 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3200
3201 if (substream == NULL)
3ad5afcd 3202 return VM_FAULT_SIGBUS;
1da177e4 3203 runtime = substream->runtime;
3ad5afcd
NP		 3204 vmf->page = virt_to_page(runtime->status);
3205 get_page(vmf->page);
3206 return 0;
1da177e4
LT		 3207}
3208
f0f37e2f 3209static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3210{
3ad5afcd 3211 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3212};
3213
877211f5 3214static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3215 struct vm_area_struct *area)
3216{
1da177e4
LT		 3217 long size;
3218 if (!(area->vm_flags & VM_READ))
3219 return -EINVAL;
1da177e4 3220 size = area->vm_end - area->vm_start;
877211f5 3221 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3222 return -EINVAL;
3223 area->vm_ops = &snd_pcm_vm_ops_status;
3224 area->vm_private_data = substream;
314e51b9 3225 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3226 return 0;
3227}
3228
3229/*
3230 * mmap control record
3231 */
41412fe9 3232static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf)
1da177e4 3233{
11bac800 3234 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3235 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3236
3237 if (substream == NULL)
3ad5afcd 3238 return VM_FAULT_SIGBUS;
1da177e4 3239 runtime = substream->runtime;
3ad5afcd
NP		 3240 vmf->page = virt_to_page(runtime->control);
3241 get_page(vmf->page);
3242 return 0;
1da177e4
LT		 3243}
3244
f0f37e2f 3245static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3246{
3ad5afcd 3247 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3248};
3249
877211f5 3250static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3251 struct vm_area_struct *area)
3252{
1da177e4
LT		 3253 long size;
3254 if (!(area->vm_flags & VM_READ))
3255 return -EINVAL;
1da177e4 3256 size = area->vm_end - area->vm_start;
877211f5 3257 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3258 return -EINVAL;
3259 area->vm_ops = &snd_pcm_vm_ops_control;
3260 area->vm_private_data = substream;
314e51b9 3261 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3262 return 0;
3263}
42f94597
TI		 3264
3265static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
3266{
3267 if (pcm_file->no_compat_mmap)
3268 return false;
b602aa8e
TI		 3269 /* See pcm_control_mmap_allowed() below.
3270 * Since older alsa-lib requires both status and control mmaps to be
3271 * coupled, we have to disable the status mmap for old alsa-lib, too.
3272 */
3273 if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) &&
3274 (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR))
3275 return false;
3276 return true;
3277}
3278
3279static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
3280{
3281 if (pcm_file->no_compat_mmap)
3282 return false;
3283 /* Disallow the control mmap when SYNC_APPLPTR flag is set;
42f94597
TI		 3284 * it enforces the user-space to fall back to snd_pcm_sync_ptr(),
3285 * thus it effectively assures the manual update of appl_ptr.
42f94597
TI		 3286 */
3287 if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)
3288 return false;
3289 return true;
3290}
3291
1da177e4
LT		 3292#else /* ! coherent mmap */
3293/*
3294 * don't support mmap for status and control records.
3295 */
42f94597 3296#define pcm_status_mmap_allowed(pcm_file) false
b602aa8e 3297#define pcm_control_mmap_allowed(pcm_file) false
42f94597 3298
877211f5 3299static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3300 struct vm_area_struct *area)
3301{
3302 return -ENXIO;
3303}
877211f5 3304static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3305 struct vm_area_struct *area)
3306{
3307 return -ENXIO;
3308}
3309#endif /* coherent mmap */
3310
9eb4a067
TI		 3311static inline struct page *
3312snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3313{
3314 void *vaddr = substream->runtime->dma_area + ofs;
3315 return virt_to_page(vaddr);
3316}
3317
1da177e4 3318/*
3ad5afcd 3319 * fault callback for mmapping a RAM page
1da177e4 3320 */
41412fe9 3321static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf)
1da177e4 3322{
11bac800 3323 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3324 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3325 unsigned long offset;
3326 struct page * page;
1da177e4
LT		 3327 size_t dma_bytes;
3328
3329 if (substream == NULL)
3ad5afcd 3330 return VM_FAULT_SIGBUS;
1da177e4 3331 runtime = substream->runtime;
3ad5afcd 3332 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3333 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3334 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3335 return VM_FAULT_SIGBUS;
9eb4a067 3336 if (substream->ops->page)
1da177e4 3337 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3338 else
3339 page = snd_pcm_default_page_ops(substream, offset);
3340 if (!page)
3341 return VM_FAULT_SIGBUS;
b5810039 3342 get_page(page);
3ad5afcd
NP		 3343 vmf->page = page;
3344 return 0;
1da177e4
LT		 3345}
3346
657b1989
TI		 3347static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3348 .open = snd_pcm_mmap_data_open,
3349 .close = snd_pcm_mmap_data_close,
3350};
3351
3352static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3353 .open = snd_pcm_mmap_data_open,
3354 .close = snd_pcm_mmap_data_close,
3ad5afcd 3355 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3356};
3357
3358/*
3359 * mmap the DMA buffer on RAM
3360 */
30b771cf
TI		 3361
3362/**
3363 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3364 * @substream: PCM substream
3365 * @area: VMA
3366 *
3367 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3368 * this function is invoked implicitly.
3369 */
18a2b962
TI		 3370int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3371 struct vm_area_struct *area)
1da177e4 3372{
314e51b9 3373 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
a5606f85 3374#ifdef CONFIG_GENERIC_ALLOCATOR
05503214
NC		 3375 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3376 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3377 return remap_pfn_range(area, area->vm_start,
3378 substream->dma_buffer.addr >> PAGE_SHIFT,
3379 area->vm_end - area->vm_start, area->vm_page_prot);
3380 }
a5606f85 3381#endif /* CONFIG_GENERIC_ALLOCATOR */
49d776ff 3382#ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
abe594c2 3383 if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page &&
657b1989
TI		 3384 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3385 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3386 area,
3387 substream->runtime->dma_area,
3388 substream->runtime->dma_addr,
9066ae7f 3389 substream->runtime->dma_bytes);
49d776ff 3390#endif /* CONFIG_X86 */
657b1989
TI		 3391 /* mmap with fault handler */
3392 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3393 return 0;
3394}
18a2b962 3395EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3396
3397/*
3398 * mmap the DMA buffer on I/O memory area
3399 */
3400#if SNDRV_PCM_INFO_MMAP_IOMEM
30b771cf
TI		 3401/**
3402 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3403 * @substream: PCM substream
3404 * @area: VMA
3405 *
3406 * When your hardware uses the iomapped pages as the hardware buffer and
3407 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3408 * is supposed to work only on limited architectures.
3409 */
877211f5
TI		 3410int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3411 struct vm_area_struct *area)
1da177e4 3412{
3c7f6919 3413 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 3414
1da177e4 3415 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
0fe09a45 3416 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
1da177e4 3417}
e88e8ae6 3418EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3419#endif /* SNDRV_PCM_INFO_MMAP */
3420
3421/*
3422 * mmap DMA buffer
3423 */
877211f5 3424int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3425 struct vm_area_struct *area)
3426{
877211f5 3427 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3428 long size;
3429 unsigned long offset;
3430 size_t dma_bytes;
657b1989 3431 int err;
1da177e4
LT		 3432
3433 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3434 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3435 return -EINVAL;
3436 } else {
3437 if (!(area->vm_flags & VM_READ))
3438 return -EINVAL;
3439 }
3440 runtime = substream->runtime;
1da177e4
LT		 3441 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3442 return -EBADFD;
3443 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3444 return -ENXIO;
3445 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3446 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3447 return -EINVAL;
3448 size = area->vm_end - area->vm_start;
3449 offset = area->vm_pgoff << PAGE_SHIFT;
3450 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3451 if ((size_t)size > dma_bytes)
3452 return -EINVAL;
3453 if (offset > dma_bytes - size)
3454 return -EINVAL;
3455
657b1989
TI		 3456 area->vm_ops = &snd_pcm_vm_ops_data;
3457 area->vm_private_data = substream;
1da177e4 3458 if (substream->ops->mmap)
657b1989 3459 err = substream->ops->mmap(substream, area);
1da177e4 3460 else
18a2b962 3461 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3462 if (!err)
3463 atomic_inc(&substream->mmap_count);
3464 return err;
1da177e4 3465}
e88e8ae6
TI		 3466EXPORT_SYMBOL(snd_pcm_mmap_data);
3467
1da177e4
LT		 3468static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3469{
877211f5
TI		 3470 struct snd_pcm_file * pcm_file;
3471 struct snd_pcm_substream *substream;
1da177e4
LT		 3472 unsigned long offset;
3473
3474 pcm_file = file->private_data;
3475 substream = pcm_file->substream;
7eaa943c
TI		 3476 if (PCM_RUNTIME_CHECK(substream))
3477 return -ENXIO;
1da177e4
LT		 3478
3479 offset = area->vm_pgoff << PAGE_SHIFT;
3480 switch (offset) {
3481 case SNDRV_PCM_MMAP_OFFSET_STATUS:
42f94597 3482 if (!pcm_status_mmap_allowed(pcm_file))
1da177e4
LT		 3483 return -ENXIO;
3484 return snd_pcm_mmap_status(substream, file, area);
3485 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
b602aa8e 3486 if (!pcm_control_mmap_allowed(pcm_file))
1da177e4
LT		 3487 return -ENXIO;
3488 return snd_pcm_mmap_control(substream, file, area);
3489 default:
3490 return snd_pcm_mmap_data(substream, file, area);
3491 }
3492 return 0;
3493}
3494
3495static int snd_pcm_fasync(int fd, struct file * file, int on)
3496{
877211f5
TI		 3497 struct snd_pcm_file * pcm_file;
3498 struct snd_pcm_substream *substream;
3499 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3500
3501 pcm_file = file->private_data;
3502 substream = pcm_file->substream;
7eaa943c 3503 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3504 return -ENXIO;
1da177e4 3505 runtime = substream->runtime;
d05468b7 3506 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3507}
3508
3509/*
3510 * ioctl32 compat
3511 */
3512#ifdef CONFIG_COMPAT
3513#include "pcm_compat.c"
3514#else
3515#define snd_pcm_ioctl_compat NULL
3516#endif
3517
3518/*
3519 * To be removed helpers to keep binary compatibility
3520 */
3521
59d48582 3522#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3523#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3524#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3525
877211f5
TI		 3526static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3527 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3528{
3529 unsigned int i;
3530
3531 memset(params, 0, sizeof(*params));
3532 params->flags = oparams->flags;
3533 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3534 params->masks[i].bits[0] = oparams->masks[i];
3535 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3536 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3537 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3538 params->info = oparams->info;
3539 params->msbits = oparams->msbits;
3540 params->rate_num = oparams->rate_num;
3541 params->rate_den = oparams->rate_den;
3542 params->fifo_size = oparams->fifo_size;
3543}
3544
877211f5
TI		 3545static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3546 struct snd_pcm_hw_params *params)
1da177e4
LT		 3547{
3548 unsigned int i;
3549
3550 memset(oparams, 0, sizeof(*oparams));
3551 oparams->flags = params->flags;
3552 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3553 oparams->masks[i] = params->masks[i].bits[0];
3554 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3555 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3556 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3557 oparams->info = params->info;
3558 oparams->msbits = params->msbits;
3559 oparams->rate_num = params->rate_num;
3560 oparams->rate_den = params->rate_den;
3561 oparams->fifo_size = params->fifo_size;
3562}
3563
877211f5
TI		 3564static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3565 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3566{
877211f5
TI		 3567 struct snd_pcm_hw_params *params;
3568 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3569 int err;
3570
3571 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3572 if (!params)
3573 return -ENOMEM;
1da177e4 3574
ef44a1ec
LZ		 3575 oparams = memdup_user(_oparams, sizeof(*oparams));
3576 if (IS_ERR(oparams)) {
3577 err = PTR_ERR(oparams);
1da177e4
LT		 3578 goto out;
3579 }
3580 snd_pcm_hw_convert_from_old_params(params, oparams);
3581 err = snd_pcm_hw_refine(substream, params);
f74ae15f
TS		 3582 if (err < 0)
3583 goto out_old;
ef44a1ec 3584
f74ae15f
TS		 3585 err = fixup_unreferenced_params(substream, params);
3586 if (err < 0)
3587 goto out_old;
ef44a1ec 3588
f74ae15f
TS		 3589 snd_pcm_hw_convert_to_old_params(oparams, params);
3590 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3591 err = -EFAULT;
3592out_old:
ef44a1ec 3593 kfree(oparams);
1da177e4
LT		 3594out:
3595 kfree(params);
1da177e4
LT		 3596 return err;
3597}
3598
877211f5
TI		 3599static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3600 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3601{
877211f5
TI		 3602 struct snd_pcm_hw_params *params;
3603 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3604 int err;
3605
3606 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3607 if (!params)
3608 return -ENOMEM;
3609
3610 oparams = memdup_user(_oparams, sizeof(*oparams));
3611 if (IS_ERR(oparams)) {
3612 err = PTR_ERR(oparams);
1da177e4
LT		 3613 goto out;
3614 }
f74ae15f 3615
1da177e4
LT		 3616 snd_pcm_hw_convert_from_old_params(params, oparams);
3617 err = snd_pcm_hw_params(substream, params);
f74ae15f
TS		 3618 if (err < 0)
3619 goto out_old;
ef44a1ec 3620
f74ae15f
TS		 3621 snd_pcm_hw_convert_to_old_params(oparams, params);
3622 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3623 err = -EFAULT;
3624out_old:
ef44a1ec 3625 kfree(oparams);
1da177e4
LT		 3626out:
3627 kfree(params);
1da177e4
LT		 3628 return err;
3629}
59d48582 3630#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3631
7003609b 3632#ifndef CONFIG_MMU
55c63bd2
DG		 3633static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3634 unsigned long addr,
3635 unsigned long len,
3636 unsigned long pgoff,
3637 unsigned long flags)
3638{
3639 struct snd_pcm_file *pcm_file = file->private_data;
3640 struct snd_pcm_substream *substream = pcm_file->substream;
3641 struct snd_pcm_runtime *runtime = substream->runtime;
3642 unsigned long offset = pgoff << PAGE_SHIFT;
3643
3644 switch (offset) {
3645 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3646 return (unsigned long)runtime->status;
3647 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3648 return (unsigned long)runtime->control;
3649 default:
3650 return (unsigned long)runtime->dma_area + offset;
3651 }
7003609b
CC		 3652}
3653#else
55c63bd2 3654# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3655#endif
3656
1da177e4
LT		 3657/*
3658 * Register section
3659 */
3660
9c2e08c5 3661const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3662 {
2af677fc
CL		 3663 .owner = THIS_MODULE,
3664 .write = snd_pcm_write,
1c65d986 3665 .write_iter = snd_pcm_writev,
f87135f5 3666 .open = snd_pcm_playback_open,
2af677fc 3667 .release = snd_pcm_release,
02f4865f 3668 .llseek = no_llseek,
6448fcba 3669 .poll = snd_pcm_poll,
67616fed 3670 .unlocked_ioctl = snd_pcm_ioctl,
2af677fc
CL		 3671 .compat_ioctl = snd_pcm_ioctl_compat,
3672 .mmap = snd_pcm_mmap,
3673 .fasync = snd_pcm_fasync,
55c63bd2 3674 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3675 },
3676 {
2af677fc
CL		 3677 .owner = THIS_MODULE,
3678 .read = snd_pcm_read,
1c65d986 3679 .read_iter = snd_pcm_readv,
f87135f5 3680 .open = snd_pcm_capture_open,
2af677fc 3681 .release = snd_pcm_release,
02f4865f 3682 .llseek = no_llseek,
6448fcba 3683 .poll = snd_pcm_poll,
67616fed 3684 .unlocked_ioctl = snd_pcm_ioctl,
2af677fc
CL		 3685 .compat_ioctl = snd_pcm_ioctl_compat,
3686 .mmap = snd_pcm_mmap,
3687 .fasync = snd_pcm_fasync,
55c63bd2 3688 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3689 }
3690};
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