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ALSA: pcm: probe events when parameters are changed actually
[linux-2.6-block.git] / sound / core / pcm_native.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
1da177e4 22#include <linux/mm.h>
da155d5b 23#include <linux/module.h>
1da177e4
LT		 24#include <linux/file.h>
25#include <linux/slab.h>
174cd4b1 26#include <linux/sched/signal.h>
1da177e4 27#include <linux/time.h>
e8db0be1 28#include <linux/pm_qos.h>
6cbbfe1c 29#include <linux/io.h>
657b1989 30#include <linux/dma-mapping.h>
1da177e4
LT		 31#include <sound/core.h>
32#include <sound/control.h>
33#include <sound/info.h>
34#include <sound/pcm.h>
35#include <sound/pcm_params.h>
36#include <sound/timer.h>
37#include <sound/minors.h>
e2e40f2c 38#include <linux/uio.h>
1da177e4 39
2c4842d3
TS		 40#include "pcm_local.h"
41
37567c55 42#ifdef CONFIG_SND_DEBUG
be4e31da
TS		 43#define CREATE_TRACE_POINTS
44#include "pcm_param_trace.h"
37567c55
TS		 45#else
46#define trace_hw_mask_param_enabled() 0
47#define trace_hw_interval_param_enabled() 0
48#define trace_hw_mask_param(substream, type, index, prev, curr)
49#define trace_hw_interval_param(substream, type, index, prev, curr)
50#endif
be4e31da 51
1da177e4
LT		 52/*
53 * Compatibility
54 */
55
877211f5 56struct snd_pcm_hw_params_old {
1da177e4
LT		 57 unsigned int flags;
58 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
59 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 60 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 61 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
62 unsigned int rmask;
63 unsigned int cmask;
64 unsigned int info;
65 unsigned int msbits;
66 unsigned int rate_num;
67 unsigned int rate_den;
877211f5 68 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 69 unsigned char reserved[64];
70};
71
59d48582 72#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 73#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
74#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 75
877211f5
TI		 76static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
77 struct snd_pcm_hw_params_old __user * _oparams);
78static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
79 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 80#endif
f87135f5 81static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 82
83/*
84 *
85 */
86
7af142f7
TI		 87static DEFINE_RWLOCK(snd_pcm_link_rwlock);
88static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4 89
67ec1072
TI		 90/* Writer in rwsem may block readers even during its waiting in queue,
91 * and this may lead to a deadlock when the code path takes read sem
92 * twice (e.g. one in snd_pcm_action_nonatomic() and another in
93 * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to
94 * spin until it gets the lock.
95 */
96static inline void down_write_nonblock(struct rw_semaphore *lock)
97{
98 while (!down_write_trylock(lock))
99 cond_resched();
100}
101
30b771cf
TI		 102/**
103 * snd_pcm_stream_lock - Lock the PCM stream
104 * @substream: PCM substream
105 *
106 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
107 * flag of the given substream. This also takes the global link rw lock
108 * (or rw sem), too, for avoiding the race with linked streams.
109 */
7af142f7
TI		 110void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
111{
112 if (substream->pcm->nonatomic) {
67756e31 113 down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING);
7af142f7
TI		 114 mutex_lock(&substream->self_group.mutex);
115 } else {
116 read_lock(&snd_pcm_link_rwlock);
117 spin_lock(&substream->self_group.lock);
118 }
119}
120EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
121
30b771cf
TI		 122/**
123 * snd_pcm_stream_lock - Unlock the PCM stream
124 * @substream: PCM substream
125 *
126 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
127 */
7af142f7
TI		 128void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
129{
130 if (substream->pcm->nonatomic) {
131 mutex_unlock(&substream->self_group.mutex);
132 up_read(&snd_pcm_link_rwsem);
133 } else {
134 spin_unlock(&substream->self_group.lock);
135 read_unlock(&snd_pcm_link_rwlock);
136 }
137}
138EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
139
30b771cf
TI		 140/**
141 * snd_pcm_stream_lock_irq - Lock the PCM stream
142 * @substream: PCM substream
143 *
144 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
145 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
146 * as snd_pcm_stream_lock().
147 */
7af142f7
TI		 148void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
149{
150 if (!substream->pcm->nonatomic)
151 local_irq_disable();
152 snd_pcm_stream_lock(substream);
153}
154EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
155
30b771cf
TI		 156/**
157 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
158 * @substream: PCM substream
159 *
160 * This is a counter-part of snd_pcm_stream_lock_irq().
161 */
7af142f7
TI		 162void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
163{
164 snd_pcm_stream_unlock(substream);
165 if (!substream->pcm->nonatomic)
166 local_irq_enable();
167}
168EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
169
170unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
171{
172 unsigned long flags = 0;
173 if (!substream->pcm->nonatomic)
174 local_irq_save(flags);
175 snd_pcm_stream_lock(substream);
176 return flags;
177}
178EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
179
30b771cf
TI		 180/**
181 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
182 * @substream: PCM substream
183 * @flags: irq flags
184 *
185 * This is a counter-part of snd_pcm_stream_lock_irqsave().
186 */
7af142f7
TI		 187void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
188 unsigned long flags)
189{
190 snd_pcm_stream_unlock(substream);
191 if (!substream->pcm->nonatomic)
192 local_irq_restore(flags);
193}
194EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
1da177e4 195
877211f5 196int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 197{
877211f5
TI		 198 struct snd_pcm_runtime *runtime;
199 struct snd_pcm *pcm = substream->pcm;
200 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 201
1da177e4
LT		 202 memset(info, 0, sizeof(*info));
203 info->card = pcm->card->number;
204 info->device = pcm->device;
205 info->stream = substream->stream;
206 info->subdevice = substream->number;
207 strlcpy(info->id, pcm->id, sizeof(info->id));
208 strlcpy(info->name, pcm->name, sizeof(info->name));
209 info->dev_class = pcm->dev_class;
210 info->dev_subclass = pcm->dev_subclass;
211 info->subdevices_count = pstr->substream_count;
212 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
213 strlcpy(info->subname, substream->name, sizeof(info->subname));
214 runtime = substream->runtime;
215 /* AB: FIXME!!! This is definitely nonsense */
216 if (runtime) {
217 info->sync = runtime->sync;
218 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
219 }
220 return 0;
221}
222
877211f5
TI		 223int snd_pcm_info_user(struct snd_pcm_substream *substream,
224 struct snd_pcm_info __user * _info)
1da177e4 225{
877211f5 226 struct snd_pcm_info *info;
1da177e4
LT		 227 int err;
228
229 info = kmalloc(sizeof(*info), GFP_KERNEL);
230 if (! info)
231 return -ENOMEM;
232 err = snd_pcm_info(substream, info);
233 if (err >= 0) {
234 if (copy_to_user(_info, info, sizeof(*info)))
235 err = -EFAULT;
236 }
237 kfree(info);
238 return err;
239}
240
63825f3a
TI		 241static bool hw_support_mmap(struct snd_pcm_substream *substream)
242{
243 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
244 return false;
245 /* check architectures that return -EINVAL from dma_mmap_coherent() */
246 /* FIXME: this should be some global flag */
247#if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
248 defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
249 if (!substream->ops->mmap &&
250 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
251 return false;
252#endif
253 return true;
254}
255
561e1cad
TS		 256static int constrain_mask_params(struct snd_pcm_substream *substream,
257 struct snd_pcm_hw_params *params)
258{
259 struct snd_pcm_hw_constraints *constrs =
260 &substream->runtime->hw_constraints;
261 struct snd_mask *m;
262 unsigned int k;
263 struct snd_mask old_mask;
264 int changed;
265
266 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
267 m = hw_param_mask(params, k);
268 if (snd_mask_empty(m))
269 return -EINVAL;
d81052f9
TS		 270
271 /* This parameter is not requested to change by a caller. */
561e1cad
TS		 272 if (!(params->rmask & (1 << k)))
273 continue;
274
275 if (trace_hw_mask_param_enabled())
276 old_mask = *m;
277
278 changed = snd_mask_refine(m, constrs_mask(constrs, k));
f74ae15f
TS		 279 if (changed < 0)
280 return changed;
82e7d501
TS		 281 if (changed == 0)
282 continue;
561e1cad 283
d81052f9 284 /* Set corresponding flag so that the caller gets it. */
82e7d501
TS		 285 trace_hw_mask_param(substream, k, 0, &old_mask, m);
286 params->cmask |= 1 << k;
561e1cad
TS		 287 }
288
289 return 0;
290}
291
3432fa04
TS		 292static int constrain_interval_params(struct snd_pcm_substream *substream,
293 struct snd_pcm_hw_params *params)
294{
295 struct snd_pcm_hw_constraints *constrs =
296 &substream->runtime->hw_constraints;
297 struct snd_interval *i;
298 unsigned int k;
299 struct snd_interval old_interval;
300 int changed;
301
302 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
303 i = hw_param_interval(params, k);
304 if (snd_interval_empty(i))
305 return -EINVAL;
d81052f9
TS		 306
307 /* This parameter is not requested to change by a caller. */
3432fa04
TS		 308 if (!(params->rmask & (1 << k)))
309 continue;
310
311 if (trace_hw_interval_param_enabled())
312 old_interval = *i;
313
314 changed = snd_interval_refine(i, constrs_interval(constrs, k));
f74ae15f
TS		 315 if (changed < 0)
316 return changed;
82e7d501
TS		 317 if (changed == 0)
318 continue;
3432fa04 319
d81052f9 320 /* Set corresponding flag so that the caller gets it. */
82e7d501
TS		 321 trace_hw_interval_param(substream, k, 0, &old_interval, i);
322 params->cmask |= 1 << k;
3432fa04
TS		 323 }
324
325 return 0;
326}
327
9cc07f55
TS		 328static int constrain_params_by_rules(struct snd_pcm_substream *substream,
329 struct snd_pcm_hw_params *params)
1da177e4 330{
9cc07f55
TS		 331 struct snd_pcm_hw_constraints *constrs =
332 &substream->runtime->hw_constraints;
1da177e4 333 unsigned int k;
1da177e4
LT		 334 unsigned int rstamps[constrs->rules_num];
335 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
d81052f9 336 unsigned int stamp;
a1c06e39
TS		 337 struct snd_pcm_hw_rule *r;
338 unsigned int d;
9cc07f55
TS		 339 struct snd_mask old_mask;
340 struct snd_interval old_interval;
a1c06e39 341 bool again;
9cc07f55 342 int changed;
1da177e4 343
d81052f9
TS		 344 /*
345 * Each application of rule has own sequence number.
346 *
347 * Each member of 'rstamps' array represents the sequence number of
348 * recent application of corresponding rule.
349 */
1da177e4
LT		 350 for (k = 0; k < constrs->rules_num; k++)
351 rstamps[k] = 0;
d81052f9
TS		 352
353 /*
354 * Each member of 'vstamps' array represents the sequence number of
355 * recent application of rule in which corresponding parameters were
356 * changed.
357 *
358 * In initial state, elements corresponding to parameters requested by
359 * a caller is 1. For unrequested parameters, corresponding members
360 * have 0 so that the parameters are never changed anymore.
361 */
9cc07f55 362 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
1da177e4 363 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
d81052f9
TS		 364
365 /* Due to the above design, actual sequence number starts at 2. */
366 stamp = 2;
0d4e3999 367retry:
d81052f9 368 /* Apply all rules in order. */
a1c06e39 369 again = false;
0d4e3999 370 for (k = 0; k < constrs->rules_num; k++) {
a1c06e39 371 r = &constrs->rules[k];
d81052f9
TS		 372
373 /*
374 * Check condition bits of this rule. When the rule has
375 * some condition bits, parameter without the bits is
376 * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
377 * is an example of the condition bits.
378 */
0d4e3999
TS		 379 if (r->cond && !(r->cond & params->flags))
380 continue;
d81052f9
TS		 381
382 /*
383 * The 'deps' array includes maximum three dependencies
384 * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fourth
385 * member of this array is a sentinel and should be
386 * negative value.
387 *
388 * This rule should be processed in this time when dependent
389 * parameters were changed at former applications of the other
390 * rules.
391 */
0d4e3999 392 for (d = 0; r->deps[d] >= 0; d++) {
d656b4a6 393 if (vstamps[r->deps[d]] > rstamps[k])
0d4e3999 394 break;
0d4e3999 395 }
d656b4a6 396 if (r->deps[d] < 0)
0d4e3999 397 continue;
be4e31da 398
0d4e3999
TS		 399 if (trace_hw_mask_param_enabled()) {
400 if (hw_is_mask(r->var))
401 old_mask = *hw_param_mask(params, r->var);
402 }
403 if (trace_hw_interval_param_enabled()) {
404 if (hw_is_interval(r->var))
405 old_interval = *hw_param_interval(params, r->var);
406 }
c6706de0 407
0d4e3999 408 changed = r->func(params, r);
f74ae15f
TS		 409 if (changed < 0)
410 return changed;
c6706de0 411
d81052f9 412 /*
82e7d501 413 * When the parameter is changed, notify it to the caller
d81052f9
TS		 414 * by corresponding returned bit, then preparing for next
415 * iteration.
416 */
0d4e3999 417 if (changed && r->var >= 0) {
82e7d501
TS		 418 if (hw_is_mask(r->var)) {
419 trace_hw_mask_param(substream, r->var,
420 k + 1, &old_mask,
421 hw_param_mask(params, r->var));
422 }
423 if (hw_is_interval(r->var)) {
424 trace_hw_interval_param(substream, r->var,
425 k + 1, &old_interval,
426 hw_param_interval(params, r->var));
427 }
428
0d4e3999
TS		 429 params->cmask |= (1 << r->var);
430 vstamps[r->var] = stamp;
a1c06e39 431 again = true;
1da177e4 432 }
f74ae15f 433
82e7d501 434 rstamps[k] = stamp++;
0d4e3999
TS		 435 }
436
d81052f9 437 /* Iterate to evaluate all rules till no parameters are changed. */
0d4e3999
TS		 438 if (again)
439 goto retry;
9cc07f55
TS		 440
441 return 0;
442}
443
f9a076bf
TS		 444static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
445 struct snd_pcm_hw_params *params)
446{
447 const struct snd_interval *i;
448 const struct snd_mask *m;
449 int err;
450
451 if (!params->msbits) {
452 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
453 if (snd_interval_single(i))
454 params->msbits = snd_interval_value(i);
455 }
456
457 if (!params->rate_den) {
458 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
459 if (snd_interval_single(i)) {
460 params->rate_num = snd_interval_value(i);
461 params->rate_den = 1;
462 }
463 }
464
465 if (!params->fifo_size) {
466 m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
467 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
468 if (snd_mask_single(m) && snd_interval_single(i)) {
469 err = substream->ops->ioctl(substream,
470 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
471 if (err < 0)
472 return err;
473 }
474 }
475
7802fb52
TS		 476 if (!params->info) {
477 params->info = substream->runtime->hw.info;
478 params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
479 SNDRV_PCM_INFO_DRAIN_TRIGGER);
480 if (!hw_support_mmap(substream))
481 params->info &= ~(SNDRV_PCM_INFO_MMAP |
482 SNDRV_PCM_INFO_MMAP_VALID);
483 }
484
f9a076bf
TS		 485 return 0;
486}
487
9cc07f55
TS		 488int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
489 struct snd_pcm_hw_params *params)
490{
9cc07f55
TS		 491 int err;
492
493 params->info = 0;
494 params->fifo_size = 0;
495 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
496 params->msbits = 0;
497 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
498 params->rate_num = 0;
499 params->rate_den = 0;
500 }
501
502 err = constrain_mask_params(substream, params);
503 if (err < 0)
504 return err;
505
506 err = constrain_interval_params(substream, params);
507 if (err < 0)
508 return err;
509
510 err = constrain_params_by_rules(substream, params);
511 if (err < 0)
512 return err;
513
1da177e4 514 params->rmask = 0;
7802fb52 515
1da177e4
LT		 516 return 0;
517}
e88e8ae6
TI		 518EXPORT_SYMBOL(snd_pcm_hw_refine);
519
877211f5
TI		 520static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
521 struct snd_pcm_hw_params __user * _params)
1da177e4 522{
877211f5 523 struct snd_pcm_hw_params *params;
1da177e4
LT		 524 int err;
525
ef44a1ec
LZ		 526 params = memdup_user(_params, sizeof(*params));
527 if (IS_ERR(params))
528 return PTR_ERR(params);
529
1da177e4 530 err = snd_pcm_hw_refine(substream, params);
f74ae15f
TS		 531 if (err < 0)
532 goto end;
ef44a1ec 533
f74ae15f
TS		 534 err = fixup_unreferenced_params(substream, params);
535 if (err < 0)
536 goto end;
537
538 if (copy_to_user(_params, params, sizeof(*params)))
539 err = -EFAULT;
540end:
1da177e4
LT		 541 kfree(params);
542 return err;
543}
544
9442e691
TI		 545static int period_to_usecs(struct snd_pcm_runtime *runtime)
546{
547 int usecs;
548
549 if (! runtime->rate)
550 return -1; /* invalid */
551
552 /* take 75% of period time as the deadline */
553 usecs = (750000 / runtime->rate) * runtime->period_size;
554 usecs += ((750000 % runtime->rate) * runtime->period_size) /
555 runtime->rate;
556
557 return usecs;
558}
559
9b0573c0
TI		 560static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
561{
562 snd_pcm_stream_lock_irq(substream);
563 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
564 substream->runtime->status->state = state;
565 snd_pcm_stream_unlock_irq(substream);
566}
567
90bbaf66
JY		 568static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
569 int event)
570{
571#ifdef CONFIG_SND_PCM_TIMER
572 if (substream->timer)
573 snd_timer_notify(substream->timer, event,
574 &substream->runtime->trigger_tstamp);
575#endif
576}
577
60f96aae
TS		 578/**
579 * snd_pcm_hw_param_choose - choose a configuration defined by @params
580 * @pcm: PCM instance
581 * @params: the hw_params instance
582 *
583 * Choose one configuration from configuration space defined by @params.
584 * The configuration chosen is that obtained fixing in this order:
585 * first access, first format, first subformat, min channels,
586 * min rate, min period time, max buffer size, min tick time
587 *
588 * Return: Zero if successful, or a negative error code on failure.
589 */
590static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
591 struct snd_pcm_hw_params *params)
592{
593 static const int vars[] = {
594 SNDRV_PCM_HW_PARAM_ACCESS,
595 SNDRV_PCM_HW_PARAM_FORMAT,
596 SNDRV_PCM_HW_PARAM_SUBFORMAT,
597 SNDRV_PCM_HW_PARAM_CHANNELS,
598 SNDRV_PCM_HW_PARAM_RATE,
599 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
600 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
601 SNDRV_PCM_HW_PARAM_TICK_TIME,
602 -1
603 };
604 const int *v;
7b8a54af
TS		 605 struct snd_mask old_mask;
606 struct snd_interval old_interval;
82e7d501 607 int changed;
60f96aae
TS		 608
609 for (v = vars; *v != -1; v++) {
7b8a54af
TS		 610 /* Keep old parameter to trace. */
611 if (trace_hw_mask_param_enabled()) {
612 if (hw_is_mask(*v))
613 old_mask = *hw_param_mask(params, *v);
614 }
615 if (trace_hw_interval_param_enabled()) {
616 if (hw_is_interval(*v))
617 old_interval = *hw_param_interval(params, *v);
618 }
60f96aae 619 if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
82e7d501 620 changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
60f96aae 621 else
82e7d501
TS		 622 changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
623 if (snd_BUG_ON(changed < 0))
624 return changed;
625 if (changed == 0)
626 continue;
7b8a54af 627
82e7d501 628 /* Trace the changed parameter. */
7b8a54af
TS		 629 if (hw_is_mask(*v)) {
630 trace_hw_mask_param(pcm, *v, 0, &old_mask,
631 hw_param_mask(params, *v));
632 }
633 if (hw_is_interval(*v)) {
634 trace_hw_interval_param(pcm, *v, 0, &old_interval,
635 hw_param_interval(params, *v));
636 }
60f96aae 637 }
7b8a54af 638
60f96aae
TS		 639 return 0;
640}
641
877211f5
TI		 642static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
643 struct snd_pcm_hw_params *params)
1da177e4 644{
877211f5 645 struct snd_pcm_runtime *runtime;
9442e691 646 int err, usecs;
1da177e4
LT		 647 unsigned int bits;
648 snd_pcm_uframes_t frames;
649
7eaa943c
TI		 650 if (PCM_RUNTIME_CHECK(substream))
651 return -ENXIO;
1da177e4 652 runtime = substream->runtime;
1da177e4
LT		 653 snd_pcm_stream_lock_irq(substream);
654 switch (runtime->status->state) {
655 case SNDRV_PCM_STATE_OPEN:
656 case SNDRV_PCM_STATE_SETUP:
657 case SNDRV_PCM_STATE_PREPARED:
658 break;
659 default:
660 snd_pcm_stream_unlock_irq(substream);
661 return -EBADFD;
662 }
663 snd_pcm_stream_unlock_irq(substream);
8eeaa2f9 664#if IS_ENABLED(CONFIG_SND_PCM_OSS)
1da177e4
LT		 665 if (!substream->oss.oss)
666#endif
9c323fcb 667 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 668 return -EBADFD;
669
670 params->rmask = ~0U;
671 err = snd_pcm_hw_refine(substream, params);
672 if (err < 0)
673 goto _error;
674
675 err = snd_pcm_hw_params_choose(substream, params);
676 if (err < 0)
677 goto _error;
678
f9a076bf
TS		 679 err = fixup_unreferenced_params(substream, params);
680 if (err < 0)
681 goto _error;
682
1da177e4
LT		 683 if (substream->ops->hw_params != NULL) {
684 err = substream->ops->hw_params(substream, params);
685 if (err < 0)
686 goto _error;
687 }
688
689 runtime->access = params_access(params);
690 runtime->format = params_format(params);
691 runtime->subformat = params_subformat(params);
692 runtime->channels = params_channels(params);
693 runtime->rate = params_rate(params);
694 runtime->period_size = params_period_size(params);
695 runtime->periods = params_periods(params);
696 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 697 runtime->info = params->info;
698 runtime->rate_num = params->rate_num;
699 runtime->rate_den = params->rate_den;
ab69a490
CL		 700 runtime->no_period_wakeup =
701 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
702 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 703
704 bits = snd_pcm_format_physical_width(runtime->format);
705 runtime->sample_bits = bits;
706 bits *= runtime->channels;
707 runtime->frame_bits = bits;
708 frames = 1;
709 while (bits % 8 != 0) {
710 bits *= 2;
711 frames *= 2;
712 }
713 runtime->byte_align = bits / 8;
714 runtime->min_align = frames;
715
716 /* Default sw params */
717 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
718 runtime->period_step = 1;
1da177e4 719 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 720 runtime->start_threshold = 1;
721 runtime->stop_threshold = runtime->buffer_size;
722 runtime->silence_threshold = 0;
723 runtime->silence_size = 0;
ead4046b
CL		 724 runtime->boundary = runtime->buffer_size;
725 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
726 runtime->boundary *= 2;
1da177e4
LT		 727
728 snd_pcm_timer_resolution_change(substream);
9b0573c0 729 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
9442e691 730
82f68251
JB		 731 if (pm_qos_request_active(&substream->latency_pm_qos_req))
732 pm_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 733 if ((usecs = period_to_usecs(runtime)) >= 0)
82f68251
JB		 734 pm_qos_add_request(&substream->latency_pm_qos_req,
735 PM_QOS_CPU_DMA_LATENCY, usecs);
1da177e4
LT		 736 return 0;
737 _error:
25985edc 738 /* hardware might be unusable from this time,
1da177e4
LT		 739 so we force application to retry to set
740 the correct hardware parameter settings */
9b0573c0 741 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
1da177e4
LT		 742 if (substream->ops->hw_free != NULL)
743 substream->ops->hw_free(substream);
744 return err;
745}
746
877211f5
TI		 747static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
748 struct snd_pcm_hw_params __user * _params)
1da177e4 749{
877211f5 750 struct snd_pcm_hw_params *params;
1da177e4
LT		 751 int err;
752
ef44a1ec
LZ		 753 params = memdup_user(_params, sizeof(*params));
754 if (IS_ERR(params))
755 return PTR_ERR(params);
756
1da177e4 757 err = snd_pcm_hw_params(substream, params);
f74ae15f
TS		 758 if (err < 0)
759 goto end;
ef44a1ec 760
f74ae15f
TS		 761 if (copy_to_user(_params, params, sizeof(*params)))
762 err = -EFAULT;
763end:
1da177e4
LT		 764 kfree(params);
765 return err;
766}
767
877211f5 768static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 769{
877211f5 770 struct snd_pcm_runtime *runtime;
1da177e4
LT		 771 int result = 0;
772
7eaa943c
TI		 773 if (PCM_RUNTIME_CHECK(substream))
774 return -ENXIO;
1da177e4 775 runtime = substream->runtime;
1da177e4
LT		 776 snd_pcm_stream_lock_irq(substream);
777 switch (runtime->status->state) {
778 case SNDRV_PCM_STATE_SETUP:
779 case SNDRV_PCM_STATE_PREPARED:
780 break;
781 default:
782 snd_pcm_stream_unlock_irq(substream);
783 return -EBADFD;
784 }
785 snd_pcm_stream_unlock_irq(substream);
9c323fcb 786 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 787 return -EBADFD;
788 if (substream->ops->hw_free)
789 result = substream->ops->hw_free(substream);
9b0573c0 790 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
82f68251 791 pm_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 792 return result;
793}
794
877211f5
TI		 795static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
796 struct snd_pcm_sw_params *params)
1da177e4 797{
877211f5 798 struct snd_pcm_runtime *runtime;
1250932e 799 int err;
1da177e4 800
7eaa943c
TI		 801 if (PCM_RUNTIME_CHECK(substream))
802 return -ENXIO;
1da177e4 803 runtime = substream->runtime;
1da177e4
LT		 804 snd_pcm_stream_lock_irq(substream);
805 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
806 snd_pcm_stream_unlock_irq(substream);
807 return -EBADFD;
808 }
809 snd_pcm_stream_unlock_irq(substream);
810
145d92e7
DC		 811 if (params->tstamp_mode < 0 ||
812 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
1da177e4 813 return -EINVAL;
58900810
TI		 814 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
815 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
5646eda5 816 return -EINVAL;
1da177e4
LT		 817 if (params->avail_min == 0)
818 return -EINVAL;
1da177e4
LT		 819 if (params->silence_size >= runtime->boundary) {
820 if (params->silence_threshold != 0)
821 return -EINVAL;
822 } else {
823 if (params->silence_size > params->silence_threshold)
824 return -EINVAL;
825 if (params->silence_threshold > runtime->buffer_size)
826 return -EINVAL;
827 }
1250932e 828 err = 0;
1da177e4
LT		 829 snd_pcm_stream_lock_irq(substream);
830 runtime->tstamp_mode = params->tstamp_mode;
58900810
TI		 831 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
832 runtime->tstamp_type = params->tstamp_type;
1da177e4
LT		 833 runtime->period_step = params->period_step;
834 runtime->control->avail_min = params->avail_min;
835 runtime->start_threshold = params->start_threshold;
836 runtime->stop_threshold = params->stop_threshold;
837 runtime->silence_threshold = params->silence_threshold;
838 runtime->silence_size = params->silence_size;
1da177e4
LT		 839 params->boundary = runtime->boundary;
840 if (snd_pcm_running(substream)) {
1da177e4
LT		 841 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
842 runtime->silence_size > 0)
843 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 844 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 845 }
846 snd_pcm_stream_unlock_irq(substream);
1250932e 847 return err;
1da177e4
LT		 848}
849
877211f5
TI		 850static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
851 struct snd_pcm_sw_params __user * _params)
1da177e4 852{
877211f5 853 struct snd_pcm_sw_params params;
1da177e4
LT		 854 int err;
855 if (copy_from_user(&params, _params, sizeof(params)))
856 return -EFAULT;
857 err = snd_pcm_sw_params(substream, &params);
858 if (copy_to_user(_params, &params, sizeof(params)))
859 return -EFAULT;
860 return err;
861}
862
877211f5
TI		 863int snd_pcm_status(struct snd_pcm_substream *substream,
864 struct snd_pcm_status *status)
1da177e4 865{
877211f5 866 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 867
868 snd_pcm_stream_lock_irq(substream);
3179f620
PLB		 869
870 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
871 &runtime->audio_tstamp_config);
872
873 /* backwards compatible behavior */
874 if (runtime->audio_tstamp_config.type_requested ==
875 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
876 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
877 runtime->audio_tstamp_config.type_requested =
878 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
879 else
880 runtime->audio_tstamp_config.type_requested =
881 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
882 runtime->audio_tstamp_report.valid = 0;
883 } else
884 runtime->audio_tstamp_report.valid = 1;
885
1da177e4
LT		 886 status->state = runtime->status->state;
887 status->suspended_state = runtime->status->suspended_state;
888 if (status->state == SNDRV_PCM_STATE_OPEN)
889 goto _end;
890 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 891 if (snd_pcm_running(substream)) {
1da177e4 892 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 893 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
894 status->tstamp = runtime->status->tstamp;
3179f620 895 status->driver_tstamp = runtime->driver_tstamp;
4eeaaeae
PLB		 896 status->audio_tstamp =
897 runtime->status->audio_tstamp;
3179f620
PLB		 898 if (runtime->audio_tstamp_report.valid == 1)
899 /* backwards compatibility, no report provided in COMPAT mode */
900 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
901 &status->audio_tstamp_accuracy,
902 &runtime->audio_tstamp_report);
903
8c121586
JK		 904 goto _tstamp_end;
905 }
0d59b814
PLB		 906 } else {
907 /* get tstamp only in fallback mode and only if enabled */
908 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
909 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 910 }
8c121586 911 _tstamp_end:
1da177e4
LT		 912 status->appl_ptr = runtime->control->appl_ptr;
913 status->hw_ptr = runtime->status->hw_ptr;
914 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
915 status->avail = snd_pcm_playback_avail(runtime);
916 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 917 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 918 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 919 status->delay += runtime->delay;
920 } else
1da177e4
LT		 921 status->delay = 0;
922 } else {
923 status->avail = snd_pcm_capture_avail(runtime);
924 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 925 status->delay = status->avail + runtime->delay;
1da177e4
LT		 926 else
927 status->delay = 0;
928 }
929 status->avail_max = runtime->avail_max;
930 status->overrange = runtime->overrange;
931 runtime->avail_max = 0;
932 runtime->overrange = 0;
933 _end:
934 snd_pcm_stream_unlock_irq(substream);
935 return 0;
936}
937
877211f5 938static int snd_pcm_status_user(struct snd_pcm_substream *substream,
38ca2a4d
PLB		 939 struct snd_pcm_status __user * _status,
940 bool ext)
1da177e4 941{
877211f5 942 struct snd_pcm_status status;
1da177e4 943 int res;
38ca2a4d 944
1da177e4 945 memset(&status, 0, sizeof(status));
38ca2a4d
PLB		 946 /*
947 * with extension, parameters are read/write,
948 * get audio_tstamp_data from user,
949 * ignore rest of status structure
950 */
951 if (ext && get_user(status.audio_tstamp_data,
952 (u32 __user *)(&_status->audio_tstamp_data)))
953 return -EFAULT;
1da177e4
LT		 954 res = snd_pcm_status(substream, &status);
955 if (res < 0)
956 return res;
957 if (copy_to_user(_status, &status, sizeof(status)))
958 return -EFAULT;
959 return 0;
960}
961
877211f5
TI		 962static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
963 struct snd_pcm_channel_info * info)
1da177e4 964{
877211f5 965 struct snd_pcm_runtime *runtime;
1da177e4
LT		 966 unsigned int channel;
967
1da177e4
LT		 968 channel = info->channel;
969 runtime = substream->runtime;
970 snd_pcm_stream_lock_irq(substream);
971 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
972 snd_pcm_stream_unlock_irq(substream);
973 return -EBADFD;
974 }
975 snd_pcm_stream_unlock_irq(substream);
976 if (channel >= runtime->channels)
977 return -EINVAL;
978 memset(info, 0, sizeof(*info));
979 info->channel = channel;
980 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
981}
982
877211f5
TI		 983static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
984 struct snd_pcm_channel_info __user * _info)
1da177e4 985{
877211f5 986 struct snd_pcm_channel_info info;
1da177e4
LT		 987 int res;
988
989 if (copy_from_user(&info, _info, sizeof(info)))
990 return -EFAULT;
991 res = snd_pcm_channel_info(substream, &info);
992 if (res < 0)
993 return res;
994 if (copy_to_user(_info, &info, sizeof(info)))
995 return -EFAULT;
996 return 0;
997}
998
877211f5 999static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 1000{
877211f5 1001 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1002 if (runtime->trigger_master == NULL)
1003 return;
1004 if (runtime->trigger_master == substream) {
2b79d7a6
PLB		 1005 if (!runtime->trigger_tstamp_latched)
1006 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 1007 } else {
1008 snd_pcm_trigger_tstamp(runtime->trigger_master);
1009 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
1010 }
1011 runtime->trigger_master = NULL;
1012}
1013
1014struct action_ops {
877211f5
TI		 1015 int (*pre_action)(struct snd_pcm_substream *substream, int state);
1016 int (*do_action)(struct snd_pcm_substream *substream, int state);
1017 void (*undo_action)(struct snd_pcm_substream *substream, int state);
1018 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 1019};
1020
1021/*
1022 * this functions is core for handling of linked stream
1023 * Note: the stream state might be changed also on failure
1024 * Note2: call with calling stream lock + link lock
1025 */
b17154cf 1026static int snd_pcm_action_group(const struct action_ops *ops,
877211f5 1027 struct snd_pcm_substream *substream,
1da177e4
LT		 1028 int state, int do_lock)
1029{
877211f5
TI		 1030 struct snd_pcm_substream *s = NULL;
1031 struct snd_pcm_substream *s1;
dde1c652 1032 int res = 0, depth = 1;
1da177e4 1033
ef991b95 1034 snd_pcm_group_for_each_entry(s, substream) {
257f8cce
TI		 1035 if (do_lock && s != substream) {
1036 if (s->pcm->nonatomic)
dde1c652 1037 mutex_lock_nested(&s->self_group.mutex, depth);
257f8cce 1038 else
dde1c652
TI		 1039 spin_lock_nested(&s->self_group.lock, depth);
1040 depth++;
257f8cce 1041 }
1da177e4
LT		 1042 res = ops->pre_action(s, state);
1043 if (res < 0)
1044 goto _unlock;
1045 }
ef991b95 1046 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 1047 res = ops->do_action(s, state);
1048 if (res < 0) {
1049 if (ops->undo_action) {
ef991b95 1050 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 1051 if (s1 == s) /* failed stream */
1052 break;
1053 ops->undo_action(s1, state);
1054 }
1055 }
1056 s = NULL; /* unlock all */
1057 goto _unlock;
1058 }
1059 }
ef991b95 1060 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 1061 ops->post_action(s, state);
1062 }
1063 _unlock:
1064 if (do_lock) {
1065 /* unlock streams */
ef991b95 1066 snd_pcm_group_for_each_entry(s1, substream) {
257f8cce 1067 if (s1 != substream) {
811deede 1068 if (s1->pcm->nonatomic)
257f8cce
TI		 1069 mutex_unlock(&s1->self_group.mutex);
1070 else
1071 spin_unlock(&s1->self_group.lock);
1072 }
1da177e4
LT		 1073 if (s1 == s) /* end */
1074 break;
1075 }
1076 }
1077 return res;
1078}
1079
1080/*
1081 * Note: call with stream lock
1082 */
b17154cf 1083static int snd_pcm_action_single(const struct action_ops *ops,
877211f5 1084 struct snd_pcm_substream *substream,
1da177e4
LT		 1085 int state)
1086{
1087 int res;
1088
1089 res = ops->pre_action(substream, state);
1090 if (res < 0)
1091 return res;
1092 res = ops->do_action(substream, state);
1093 if (res == 0)
1094 ops->post_action(substream, state);
1095 else if (ops->undo_action)
1096 ops->undo_action(substream, state);
1097 return res;
1098}
1099
aa8edd8c
TI		 1100/*
1101 * Note: call with stream lock
1102 */
b17154cf 1103static int snd_pcm_action(const struct action_ops *ops,
aa8edd8c
TI		 1104 struct snd_pcm_substream *substream,
1105 int state)
257f8cce
TI		 1106{
1107 int res;
1108
aa8edd8c
TI		 1109 if (!snd_pcm_stream_linked(substream))
1110 return snd_pcm_action_single(ops, substream, state);
1111
1112 if (substream->pcm->nonatomic) {
257f8cce
TI		 1113 if (!mutex_trylock(&substream->group->mutex)) {
1114 mutex_unlock(&substream->self_group.mutex);
1115 mutex_lock(&substream->group->mutex);
1116 mutex_lock(&substream->self_group.mutex);
1117 }
1118 res = snd_pcm_action_group(ops, substream, state, 1);
1119 mutex_unlock(&substream->group->mutex);
1120 } else {
1da177e4
LT		 1121 if (!spin_trylock(&substream->group->lock)) {
1122 spin_unlock(&substream->self_group.lock);
1123 spin_lock(&substream->group->lock);
1124 spin_lock(&substream->self_group.lock);
1125 }
1126 res = snd_pcm_action_group(ops, substream, state, 1);
1127 spin_unlock(&substream->group->lock);
1da177e4
LT		 1128 }
1129 return res;
1130}
1131
1132/*
1133 * Note: don't use any locks before
1134 */
b17154cf 1135static int snd_pcm_action_lock_irq(const struct action_ops *ops,
877211f5 1136 struct snd_pcm_substream *substream,
1da177e4
LT		 1137 int state)
1138{
1139 int res;
1140
e3a4bd5e
TI		 1141 snd_pcm_stream_lock_irq(substream);
1142 res = snd_pcm_action(ops, substream, state);
1143 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1144 return res;
1145}
1146
1147/*
1148 */
b17154cf 1149static int snd_pcm_action_nonatomic(const struct action_ops *ops,
877211f5 1150 struct snd_pcm_substream *substream,
1da177e4
LT		 1151 int state)
1152{
1153 int res;
1154
1155 down_read(&snd_pcm_link_rwsem);
1156 if (snd_pcm_stream_linked(substream))
1157 res = snd_pcm_action_group(ops, substream, state, 0);
1158 else
1159 res = snd_pcm_action_single(ops, substream, state);
1160 up_read(&snd_pcm_link_rwsem);
1161 return res;
1162}
1163
1164/*
1165 * start callbacks
1166 */
877211f5 1167static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 1168{
877211f5 1169 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1170 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1171 return -EBADFD;
1172 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1173 !snd_pcm_playback_data(substream))
1174 return -EPIPE;
2b79d7a6 1175 runtime->trigger_tstamp_latched = false;
1da177e4
LT		 1176 runtime->trigger_master = substream;
1177 return 0;
1178}
1179
877211f5 1180static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1181{
1182 if (substream->runtime->trigger_master != substream)
1183 return 0;
1184 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1185}
1186
877211f5 1187static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1188{
1189 if (substream->runtime->trigger_master == substream)
1190 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1191}
1192
877211f5 1193static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 1194{
877211f5 1195 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1196 snd_pcm_trigger_tstamp(substream);
6af3fb72 1197 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 1198 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1199 runtime->rate;
1da177e4
LT		 1200 runtime->status->state = state;
1201 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1202 runtime->silence_size > 0)
1203 snd_pcm_playback_silence(substream, ULONG_MAX);
90bbaf66 1204 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
1da177e4
LT		 1205}
1206
b17154cf 1207static const struct action_ops snd_pcm_action_start = {
1da177e4
LT		 1208 .pre_action = snd_pcm_pre_start,
1209 .do_action = snd_pcm_do_start,
1210 .undo_action = snd_pcm_undo_start,
1211 .post_action = snd_pcm_post_start
1212};
1213
1214/**
1c85cc64 1215 * snd_pcm_start - start all linked streams
df8db936 1216 * @substream: the PCM substream instance
eb7c06e8
YB		 1217 *
1218 * Return: Zero if successful, or a negative error code.
c2c86a97 1219 * The stream lock must be acquired before calling this function.
1da177e4 1220 */
877211f5 1221int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 1222{
877211f5
TI		 1223 return snd_pcm_action(&snd_pcm_action_start, substream,
1224 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 1225}
1226
c2c86a97
TI		 1227/* take the stream lock and start the streams */
1228static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
1229{
1230 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
1231 SNDRV_PCM_STATE_RUNNING);
1232}
1233
1da177e4
LT		 1234/*
1235 * stop callbacks
1236 */
877211f5 1237static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1238{
877211f5 1239 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1240 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1241 return -EBADFD;
1242 runtime->trigger_master = substream;
1243 return 0;
1244}
1245
877211f5 1246static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1247{
1248 if (substream->runtime->trigger_master == substream &&
1249 snd_pcm_running(substream))
1250 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1251 return 0; /* unconditonally stop all substreams */
1252}
1253
877211f5 1254static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1255{
877211f5 1256 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1257 if (runtime->status->state != state) {
1258 snd_pcm_trigger_tstamp(substream);
9bc889b4 1259 runtime->status->state = state;
90bbaf66 1260 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
1da177e4
LT		 1261 }
1262 wake_up(&runtime->sleep);
c91a988d 1263 wake_up(&runtime->tsleep);
1da177e4
LT		 1264}
1265
b17154cf 1266static const struct action_ops snd_pcm_action_stop = {
1da177e4
LT		 1267 .pre_action = snd_pcm_pre_stop,
1268 .do_action = snd_pcm_do_stop,
1269 .post_action = snd_pcm_post_stop
1270};
1271
1272/**
1c85cc64 1273 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 1274 * @substream: the PCM substream instance
1275 * @state: PCM state after stopping the stream
1da177e4 1276 *
1c85cc64 1277 * The state of each stream is then changed to the given state unconditionally.
eb7c06e8 1278 *
0a11458c 1279 * Return: Zero if successful, or a negative error code.
1da177e4 1280 */
fea952e5 1281int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 1282{
1283 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1284}
1285
e88e8ae6
TI		 1286EXPORT_SYMBOL(snd_pcm_stop);
1287
1da177e4 1288/**
1c85cc64 1289 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 1290 * @substream: the PCM substream
1da177e4 1291 *
1c85cc64 1292 * After stopping, the state is changed to SETUP.
1da177e4 1293 * Unlike snd_pcm_stop(), this affects only the given stream.
eb7c06e8
YB		 1294 *
1295 * Return: Zero if succesful, or a negative error code.
1da177e4 1296 */
877211f5 1297int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 1298{
877211f5
TI		 1299 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1300 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 1301}
1302
1fb8510c
TI		 1303/**
1304 * snd_pcm_stop_xrun - stop the running streams as XRUN
1305 * @substream: the PCM substream instance
1fb8510c
TI		 1306 *
1307 * This stops the given running substream (and all linked substreams) as XRUN.
1308 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1309 *
1310 * Return: Zero if successful, or a negative error code.
1311 */
1312int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1313{
1314 unsigned long flags;
1315 int ret = 0;
1316
1317 snd_pcm_stream_lock_irqsave(substream, flags);
1318 if (snd_pcm_running(substream))
1319 ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1320 snd_pcm_stream_unlock_irqrestore(substream, flags);
1321 return ret;
1322}
1323EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1324
1da177e4
LT		 1325/*
1326 * pause callbacks
1327 */
877211f5 1328static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1329{
877211f5 1330 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1331 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1332 return -ENOSYS;
1333 if (push) {
1334 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1335 return -EBADFD;
1336 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1337 return -EBADFD;
1338 runtime->trigger_master = substream;
1339 return 0;
1340}
1341
877211f5 1342static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1343{
1344 if (substream->runtime->trigger_master != substream)
1345 return 0;
56385a12
JK		 1346 /* some drivers might use hw_ptr to recover from the pause -
1347 update the hw_ptr now */
1348 if (push)
1349 snd_pcm_update_hw_ptr(substream);
6af3fb72 1350 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 1351 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1352 * delta, effectively to skip the check once.
1353 */
1354 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 1355 return substream->ops->trigger(substream,
1356 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1357 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1358}
1359
877211f5 1360static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1361{
1362 if (substream->runtime->trigger_master == substream)
1363 substream->ops->trigger(substream,
1364 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1365 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1366}
1367
877211f5 1368static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1369{
877211f5 1370 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1371 snd_pcm_trigger_tstamp(substream);
1372 if (push) {
1373 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
90bbaf66 1374 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
1da177e4 1375 wake_up(&runtime->sleep);
c91a988d 1376 wake_up(&runtime->tsleep);
1da177e4
LT		 1377 } else {
1378 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
90bbaf66 1379 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
1da177e4
LT		 1380 }
1381}
1382
b17154cf 1383static const struct action_ops snd_pcm_action_pause = {
1da177e4
LT		 1384 .pre_action = snd_pcm_pre_pause,
1385 .do_action = snd_pcm_do_pause,
1386 .undo_action = snd_pcm_undo_pause,
1387 .post_action = snd_pcm_post_pause
1388};
1389
1390/*
1391 * Push/release the pause for all linked streams.
1392 */
877211f5 1393static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1394{
1395 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1396}
1397
1398#ifdef CONFIG_PM
1399/* suspend */
1400
877211f5 1401static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1402{
877211f5 1403 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1404 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1405 return -EBUSY;
1406 runtime->trigger_master = substream;
1407 return 0;
1408}
1409
877211f5 1410static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1411{
877211f5 1412 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1413 if (runtime->trigger_master != substream)
1414 return 0;
1415 if (! snd_pcm_running(substream))
1416 return 0;
1417 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1418 return 0; /* suspend unconditionally */
1419}
1420
877211f5 1421static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1422{
877211f5 1423 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1424 snd_pcm_trigger_tstamp(substream);
9bc889b4
TI		 1425 runtime->status->suspended_state = runtime->status->state;
1426 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
90bbaf66 1427 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
1da177e4 1428 wake_up(&runtime->sleep);
c91a988d 1429 wake_up(&runtime->tsleep);
1da177e4
LT		 1430}
1431
b17154cf 1432static const struct action_ops snd_pcm_action_suspend = {
1da177e4
LT		 1433 .pre_action = snd_pcm_pre_suspend,
1434 .do_action = snd_pcm_do_suspend,
1435 .post_action = snd_pcm_post_suspend
1436};
1437
1438/**
1c85cc64 1439 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1440 * @substream: the PCM substream
1da177e4 1441 *
1da177e4 1442 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1443 *
1444 * Return: Zero if successful (or @substream is %NULL), or a negative error
1445 * code.
1da177e4 1446 */
877211f5 1447int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1448{
1449 int err;
1450 unsigned long flags;
1451
603bf524
TI		 1452 if (! substream)
1453 return 0;
1454
1da177e4
LT		 1455 snd_pcm_stream_lock_irqsave(substream, flags);
1456 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1457 snd_pcm_stream_unlock_irqrestore(substream, flags);
1458 return err;
1459}
1460
e88e8ae6
TI		 1461EXPORT_SYMBOL(snd_pcm_suspend);
1462
1da177e4 1463/**
1c85cc64 1464 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1465 * @pcm: the PCM instance
1da177e4 1466 *
1da177e4 1467 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1468 *
1469 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1da177e4 1470 */
877211f5 1471int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1472{
877211f5 1473 struct snd_pcm_substream *substream;
1da177e4
LT		 1474 int stream, err = 0;
1475
603bf524
TI		 1476 if (! pcm)
1477 return 0;
1478
1da177e4 1479 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1480 for (substream = pcm->streams[stream].substream;
1481 substream; substream = substream->next) {
1da177e4
LT		 1482 /* FIXME: the open/close code should lock this as well */
1483 if (substream->runtime == NULL)
1484 continue;
1485 err = snd_pcm_suspend(substream);
1486 if (err < 0 && err != -EBUSY)
1487 return err;
1488 }
1489 }
1490 return 0;
1491}
1492
e88e8ae6
TI		 1493EXPORT_SYMBOL(snd_pcm_suspend_all);
1494
1da177e4
LT		 1495/* resume */
1496
877211f5 1497static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1498{
877211f5 1499 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1500 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1501 return -ENOSYS;
1502 runtime->trigger_master = substream;
1503 return 0;
1504}
1505
877211f5 1506static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1507{
877211f5 1508 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1509 if (runtime->trigger_master != substream)
1510 return 0;
1511 /* DMA not running previously? */
1512 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1513 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1514 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1515 return 0;
1516 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1517}
1518
877211f5 1519static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1520{
1521 if (substream->runtime->trigger_master == substream &&
1522 snd_pcm_running(substream))
1523 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1524}
1525
877211f5 1526static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1527{
877211f5 1528 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1529 snd_pcm_trigger_tstamp(substream);
9bc889b4 1530 runtime->status->state = runtime->status->suspended_state;
90bbaf66 1531 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
1da177e4
LT		 1532}
1533
b17154cf 1534static const struct action_ops snd_pcm_action_resume = {
1da177e4
LT		 1535 .pre_action = snd_pcm_pre_resume,
1536 .do_action = snd_pcm_do_resume,
1537 .undo_action = snd_pcm_undo_resume,
1538 .post_action = snd_pcm_post_resume
1539};
1540
877211f5 1541static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1542{
877211f5 1543 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1544 int res;
1545
1546 snd_power_lock(card);
cbac4b0c 1547 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1548 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1549 snd_power_unlock(card);
1550 return res;
1551}
1552
1553#else
1554
877211f5 1555static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1556{
1557 return -ENOSYS;
1558}
1559
1560#endif /* CONFIG_PM */
1561
1562/*
1563 * xrun ioctl
1564 *
1565 * Change the RUNNING stream(s) to XRUN state.
1566 */
877211f5 1567static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1568{
877211f5
TI		 1569 struct snd_card *card = substream->pcm->card;
1570 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1571 int result;
1572
1573 snd_power_lock(card);
1574 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1575 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1576 if (result < 0)
1577 goto _unlock;
1578 }
1579
1580 snd_pcm_stream_lock_irq(substream);
1581 switch (runtime->status->state) {
1582 case SNDRV_PCM_STATE_XRUN:
1583 result = 0; /* already there */
1584 break;
1585 case SNDRV_PCM_STATE_RUNNING:
1586 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1587 break;
1588 default:
1589 result = -EBADFD;
1590 }
1591 snd_pcm_stream_unlock_irq(substream);
1592 _unlock:
1593 snd_power_unlock(card);
1594 return result;
1595}
1596
1597/*
1598 * reset ioctl
1599 */
877211f5 1600static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1601{
877211f5 1602 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1603 switch (runtime->status->state) {
1604 case SNDRV_PCM_STATE_RUNNING:
1605 case SNDRV_PCM_STATE_PREPARED:
1606 case SNDRV_PCM_STATE_PAUSED:
1607 case SNDRV_PCM_STATE_SUSPENDED:
1608 return 0;
1609 default:
1610 return -EBADFD;
1611 }
1612}
1613
877211f5 1614static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1615{
877211f5 1616 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1617 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1618 if (err < 0)
1619 return err;
1da177e4 1620 runtime->hw_ptr_base = 0;
e7636925
JK		 1621 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1622 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1623 runtime->silence_start = runtime->status->hw_ptr;
1624 runtime->silence_filled = 0;
1625 return 0;
1626}
1627
877211f5 1628static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1629{
877211f5 1630 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1631 runtime->control->appl_ptr = runtime->status->hw_ptr;
1632 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1633 runtime->silence_size > 0)
1634 snd_pcm_playback_silence(substream, ULONG_MAX);
1635}
1636
b17154cf 1637static const struct action_ops snd_pcm_action_reset = {
1da177e4
LT		 1638 .pre_action = snd_pcm_pre_reset,
1639 .do_action = snd_pcm_do_reset,
1640 .post_action = snd_pcm_post_reset
1641};
1642
877211f5 1643static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1644{
1645 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1646}
1647
1648/*
1649 * prepare ioctl
1650 */
0df63e44
TI		 1651/* we use the second argument for updating f_flags */
1652static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1653 int f_flags)
1da177e4 1654{
877211f5 1655 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1656 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1657 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1658 return -EBADFD;
1659 if (snd_pcm_running(substream))
1660 return -EBUSY;
0df63e44 1661 substream->f_flags = f_flags;
1da177e4
LT		 1662 return 0;
1663}
1664
877211f5 1665static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1666{
1667 int err;
1668 err = substream->ops->prepare(substream);
1669 if (err < 0)
1670 return err;
1671 return snd_pcm_do_reset(substream, 0);
1672}
1673
877211f5 1674static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1675{
877211f5 1676 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1677 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1678 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1679}
1680
b17154cf 1681static const struct action_ops snd_pcm_action_prepare = {
1da177e4
LT		 1682 .pre_action = snd_pcm_pre_prepare,
1683 .do_action = snd_pcm_do_prepare,
1684 .post_action = snd_pcm_post_prepare
1685};
1686
1687/**
1c85cc64 1688 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1689 * @substream: the PCM substream instance
0df63e44 1690 * @file: file to refer f_flags
eb7c06e8
YB		 1691 *
1692 * Return: Zero if successful, or a negative error code.
1da177e4 1693 */
0df63e44
TI		 1694static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1695 struct file *file)
1da177e4
LT		 1696{
1697 int res;
877211f5 1698 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1699 int f_flags;
1700
1701 if (file)
1702 f_flags = file->f_flags;
1703 else
1704 f_flags = substream->f_flags;
1da177e4
LT		 1705
1706 snd_power_lock(card);
cbac4b0c 1707 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1708 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1709 substream, f_flags);
1da177e4
LT		 1710 snd_power_unlock(card);
1711 return res;
1712}
1713
1714/*
1715 * drain ioctl
1716 */
1717
877211f5 1718static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1719{
4f7c39dc
TI		 1720 struct snd_pcm_runtime *runtime = substream->runtime;
1721 switch (runtime->status->state) {
1722 case SNDRV_PCM_STATE_OPEN:
1723 case SNDRV_PCM_STATE_DISCONNECTED:
1724 case SNDRV_PCM_STATE_SUSPENDED:
1725 return -EBADFD;
1726 }
1727 runtime->trigger_master = substream;
1da177e4
LT		 1728 return 0;
1729}
1730
877211f5 1731static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1732{
877211f5 1733 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1734 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1735 switch (runtime->status->state) {
1736 case SNDRV_PCM_STATE_PREPARED:
1737 /* start playback stream if possible */
1738 if (! snd_pcm_playback_empty(substream)) {
1739 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1740 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
70372a75
TI		 1741 } else {
1742 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1da177e4
LT		 1743 }
1744 break;
1745 case SNDRV_PCM_STATE_RUNNING:
1746 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1747 break;
4f7c39dc
TI		 1748 case SNDRV_PCM_STATE_XRUN:
1749 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1750 break;
1da177e4
LT		 1751 default:
1752 break;
1753 }
1754 } else {
1755 /* stop running stream */
1756 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1757 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1758 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1759 snd_pcm_do_stop(substream, new_state);
1760 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1761 }
1762 }
48d88297
LY		 1763
1764 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1765 runtime->trigger_master == substream &&
1766 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1767 return substream->ops->trigger(substream,
1768 SNDRV_PCM_TRIGGER_DRAIN);
1769
1da177e4
LT		 1770 return 0;
1771}
1772
877211f5 1773static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1774{
1775}
1776
b17154cf 1777static const struct action_ops snd_pcm_action_drain_init = {
1da177e4
LT		 1778 .pre_action = snd_pcm_pre_drain_init,
1779 .do_action = snd_pcm_do_drain_init,
1780 .post_action = snd_pcm_post_drain_init
1781};
1782
877211f5 1783static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1784
1785/*
1786 * Drain the stream(s).
1787 * When the substream is linked, sync until the draining of all playback streams
1788 * is finished.
1789 * After this call, all streams are supposed to be either SETUP or DRAINING
1790 * (capture only) state.
1791 */
4cdc115f
TI		 1792static int snd_pcm_drain(struct snd_pcm_substream *substream,
1793 struct file *file)
1da177e4 1794{
877211f5
TI		 1795 struct snd_card *card;
1796 struct snd_pcm_runtime *runtime;
ef991b95 1797 struct snd_pcm_substream *s;
d3a7dcfe 1798 wait_queue_t wait;
1da177e4 1799 int result = 0;
4cdc115f 1800 int nonblock = 0;
1da177e4 1801
1da177e4
LT		 1802 card = substream->pcm->card;
1803 runtime = substream->runtime;
1804
1805 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1806 return -EBADFD;
1807
1da177e4
LT		 1808 snd_power_lock(card);
1809 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1810 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1811 if (result < 0) {
1812 snd_power_unlock(card);
1813 return result;
1814 }
1da177e4
LT		 1815 }
1816
4cdc115f
TI		 1817 if (file) {
1818 if (file->f_flags & O_NONBLOCK)
1819 nonblock = 1;
1820 } else if (substream->f_flags & O_NONBLOCK)
1821 nonblock = 1;
1822
21cb2a2e 1823 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1824 snd_pcm_stream_lock_irq(substream);
1825 /* resume pause */
d3a7dcfe 1826 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1827 snd_pcm_pause(substream, 0);
1828
1829 /* pre-start/stop - all running streams are changed to DRAINING state */
1830 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1831 if (result < 0)
1832 goto unlock;
1833 /* in non-blocking, we don't wait in ioctl but let caller poll */
1834 if (nonblock) {
1835 result = -EAGAIN;
1836 goto unlock;
21cb2a2e 1837 }
1da177e4
LT		 1838
1839 for (;;) {
1840 long tout;
d3a7dcfe 1841 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1842 if (signal_pending(current)) {
1843 result = -ERESTARTSYS;
1844 break;
1845 }
d3a7dcfe
TI		 1846 /* find a substream to drain */
1847 to_check = NULL;
1848 snd_pcm_group_for_each_entry(s, substream) {
1849 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1850 continue;
1851 runtime = s->runtime;
1852 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1853 to_check = runtime;
21cb2a2e 1854 break;
d3a7dcfe 1855 }
21cb2a2e 1856 }
d3a7dcfe
TI		 1857 if (!to_check)
1858 break; /* all drained */
1859 init_waitqueue_entry(&wait, current);
1860 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1861 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1862 up_read(&snd_pcm_link_rwsem);
1da177e4 1863 snd_power_unlock(card);
f2b3614c
TI		 1864 if (runtime->no_period_wakeup)
1865 tout = MAX_SCHEDULE_TIMEOUT;
1866 else {
1867 tout = 10;
1868 if (runtime->rate) {
1869 long t = runtime->period_size * 2 / runtime->rate;
1870 tout = max(t, tout);
1871 }
1872 tout = msecs_to_jiffies(tout * 1000);
1873 }
1874 tout = schedule_timeout_interruptible(tout);
1da177e4 1875 snd_power_lock(card);
d3a7dcfe 1876 down_read(&snd_pcm_link_rwsem);
1da177e4 1877 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1878 remove_wait_queue(&to_check->sleep, &wait);
0914f796
TI		 1879 if (card->shutdown) {
1880 result = -ENODEV;
1881 break;
1882 }
1da177e4
LT		 1883 if (tout == 0) {
1884 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1885 result = -ESTRPIPE;
1886 else {
09e56df8
TI		 1887 dev_dbg(substream->pcm->card->dev,
1888 "playback drain error (DMA or IRQ trouble?)\n");
1da177e4
LT		 1889 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1890 result = -EIO;
1891 }
1892 break;
1893 }
1da177e4 1894 }
21cb2a2e 1895
4cdc115f 1896 unlock:
21cb2a2e 1897 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1898 up_read(&snd_pcm_link_rwsem);
1da177e4 1899 snd_power_unlock(card);
1da177e4
LT		 1900
1901 return result;
1902}
1903
1904/*
1905 * drop ioctl
1906 *
1907 * Immediately put all linked substreams into SETUP state.
1908 */
877211f5 1909static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1910{
877211f5 1911 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1912 int result = 0;
1913
7eaa943c
TI		 1914 if (PCM_RUNTIME_CHECK(substream))
1915 return -ENXIO;
1da177e4 1916 runtime = substream->runtime;
1da177e4 1917
de1b8b93 1918 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1919 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1920 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1921 return -EBADFD;
1922
1da177e4
LT		 1923 snd_pcm_stream_lock_irq(substream);
1924 /* resume pause */
1925 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1926 snd_pcm_pause(substream, 0);
1927
1928 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1929 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1930 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1931
1da177e4
LT		 1932 return result;
1933}
1934
1935
0888c321 1936static bool is_pcm_file(struct file *file)
1da177e4 1937{
0888c321 1938 struct inode *inode = file_inode(file);
f87135f5
CL		 1939 unsigned int minor;
1940
0888c321
AV		 1941 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1942 return false;
1da177e4 1943 minor = iminor(inode);
0888c321
AV		 1944 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1945 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1da177e4
LT		 1946}
1947
1948/*
1949 * PCM link handling
1950 */
877211f5 1951static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1952{
1953 int res = 0;
877211f5
TI		 1954 struct snd_pcm_file *pcm_file;
1955 struct snd_pcm_substream *substream1;
1662591b 1956 struct snd_pcm_group *group;
0888c321 1957 struct fd f = fdget(fd);
1da177e4 1958
0888c321 1959 if (!f.file)
1da177e4 1960 return -EBADFD;
0888c321
AV		 1961 if (!is_pcm_file(f.file)) {
1962 res = -EBADFD;
1963 goto _badf;
1964 }
1965 pcm_file = f.file->private_data;
1da177e4 1966 substream1 = pcm_file->substream;
1662591b
TI		 1967 group = kmalloc(sizeof(*group), GFP_KERNEL);
1968 if (!group) {
1969 res = -ENOMEM;
1970 goto _nolock;
1971 }
67ec1072 1972 down_write_nonblock(&snd_pcm_link_rwsem);
1da177e4
LT		 1973 write_lock_irq(&snd_pcm_link_rwlock);
1974 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
257f8cce
TI		 1975 substream->runtime->status->state != substream1->runtime->status->state ||
1976 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1da177e4
LT		 1977 res = -EBADFD;
1978 goto _end;
1979 }
1980 if (snd_pcm_stream_linked(substream1)) {
1981 res = -EALREADY;
1982 goto _end;
1983 }
1984 if (!snd_pcm_stream_linked(substream)) {
1662591b 1985 substream->group = group;
dd6c5cd8 1986 group = NULL;
1da177e4 1987 spin_lock_init(&substream->group->lock);
257f8cce 1988 mutex_init(&substream->group->mutex);
1da177e4
LT		 1989 INIT_LIST_HEAD(&substream->group->substreams);
1990 list_add_tail(&substream->link_list, &substream->group->substreams);
1991 substream->group->count = 1;
1992 }
1993 list_add_tail(&substream1->link_list, &substream->group->substreams);
1994 substream->group->count++;
1995 substream1->group = substream->group;
1996 _end:
1997 write_unlock_irq(&snd_pcm_link_rwlock);
1998 up_write(&snd_pcm_link_rwsem);
1662591b 1999 _nolock:
a0830dbd 2000 snd_card_unref(substream1->pcm->card);
dd6c5cd8 2001 kfree(group);
0888c321
AV		 2002 _badf:
2003 fdput(f);
1da177e4
LT		 2004 return res;
2005}
2006
877211f5 2007static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 2008{
2009 substream->group = &substream->self_group;
2010 INIT_LIST_HEAD(&substream->self_group.substreams);
2011 list_add_tail(&substream->link_list, &substream->self_group.substreams);
2012}
2013
877211f5 2014static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 2015{
ef991b95 2016 struct snd_pcm_substream *s;
1da177e4
LT		 2017 int res = 0;
2018
67ec1072 2019 down_write_nonblock(&snd_pcm_link_rwsem);
1da177e4
LT		 2020 write_lock_irq(&snd_pcm_link_rwlock);
2021 if (!snd_pcm_stream_linked(substream)) {
2022 res = -EALREADY;
2023 goto _end;
2024 }
2025 list_del(&substream->link_list);
2026 substream->group->count--;
2027 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 2028 snd_pcm_group_for_each_entry(s, substream) {
2029 relink_to_local(s);
1da177e4
LT		 2030 break;
2031 }
2032 kfree(substream->group);
2033 }
2034 relink_to_local(substream);
2035 _end:
2036 write_unlock_irq(&snd_pcm_link_rwlock);
2037 up_write(&snd_pcm_link_rwsem);
2038 return res;
2039}
2040
2041/*
2042 * hw configurator
2043 */
877211f5
TI		 2044static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
2045 struct snd_pcm_hw_rule *rule)
1da177e4 2046{
877211f5 2047 struct snd_interval t;
1da177e4
LT		 2048 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
2049 hw_param_interval_c(params, rule->deps[1]), &t);
2050 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2051}
2052
877211f5
TI		 2053static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
2054 struct snd_pcm_hw_rule *rule)
1da177e4 2055{
877211f5 2056 struct snd_interval t;
1da177e4
LT		 2057 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
2058 hw_param_interval_c(params, rule->deps[1]), &t);
2059 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2060}
2061
877211f5
TI		 2062static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
2063 struct snd_pcm_hw_rule *rule)
1da177e4 2064{
877211f5 2065 struct snd_interval t;
1da177e4
LT		 2066 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
2067 hw_param_interval_c(params, rule->deps[1]),
2068 (unsigned long) rule->private, &t);
2069 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2070}
2071
877211f5
TI		 2072static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
2073 struct snd_pcm_hw_rule *rule)
1da177e4 2074{
877211f5 2075 struct snd_interval t;
1da177e4
LT		 2076 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
2077 (unsigned long) rule->private,
2078 hw_param_interval_c(params, rule->deps[1]), &t);
2079 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2080}
2081
877211f5
TI		 2082static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
2083 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 2084{
2085 unsigned int k;
b55f9fdc
TS		 2086 const struct snd_interval *i =
2087 hw_param_interval_c(params, rule->deps[0]);
877211f5
TI		 2088 struct snd_mask m;
2089 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 2090 snd_mask_any(&m);
2091 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2092 int bits;
2093 if (! snd_mask_test(mask, k))
2094 continue;
2095 bits = snd_pcm_format_physical_width(k);
2096 if (bits <= 0)
2097 continue; /* ignore invalid formats */
2098 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
2099 snd_mask_reset(&m, k);
2100 }
2101 return snd_mask_refine(mask, &m);
2102}
2103
877211f5
TI		 2104static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
2105 struct snd_pcm_hw_rule *rule)
1da177e4 2106{
877211f5 2107 struct snd_interval t;
1da177e4
LT		 2108 unsigned int k;
2109 t.min = UINT_MAX;
2110 t.max = 0;
2111 t.openmin = 0;
2112 t.openmax = 0;
2113 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
2114 int bits;
2115 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
2116 continue;
2117 bits = snd_pcm_format_physical_width(k);
2118 if (bits <= 0)
2119 continue; /* ignore invalid formats */
2120 if (t.min > (unsigned)bits)
2121 t.min = bits;
2122 if (t.max < (unsigned)bits)
2123 t.max = bits;
2124 }
2125 t.integer = 1;
2126 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2127}
2128
2129#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
2130#error "Change this table"
2131#endif
2132
8b674308
TS		 2133static const unsigned int rates[] = {
2134 5512, 8000, 11025, 16000, 22050, 32000, 44100,
2135 48000, 64000, 88200, 96000, 176400, 192000
2136};
1da177e4 2137
7653d557
CL		 2138const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
2139 .count = ARRAY_SIZE(rates),
2140 .list = rates,
2141};
2142
877211f5
TI		 2143static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
2144 struct snd_pcm_hw_rule *rule)
1da177e4 2145{
877211f5 2146 struct snd_pcm_hardware *hw = rule->private;
1da177e4 2147 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 2148 snd_pcm_known_rates.count,
2149 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 2150}
2151
877211f5
TI		 2152static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2153 struct snd_pcm_hw_rule *rule)
1da177e4 2154{
877211f5
TI		 2155 struct snd_interval t;
2156 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 2157 t.min = 0;
2158 t.max = substream->buffer_bytes_max;
2159 t.openmin = 0;
2160 t.openmax = 0;
2161 t.integer = 1;
2162 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2163}
2164
877211f5 2165int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 2166{
877211f5
TI		 2167 struct snd_pcm_runtime *runtime = substream->runtime;
2168 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 2169 int k, err;
2170
2171 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2172 snd_mask_any(constrs_mask(constrs, k));
2173 }
2174
2175 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2176 snd_interval_any(constrs_interval(constrs, k));
2177 }
2178
2179 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2180 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2181 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2182 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2183 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2184
2185 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2186 snd_pcm_hw_rule_format, NULL,
2187 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2188 if (err < 0)
2189 return err;
2190 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2191 snd_pcm_hw_rule_sample_bits, NULL,
2192 SNDRV_PCM_HW_PARAM_FORMAT,
2193 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2194 if (err < 0)
2195 return err;
2196 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2197 snd_pcm_hw_rule_div, NULL,
2198 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2199 if (err < 0)
2200 return err;
2201 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2202 snd_pcm_hw_rule_mul, NULL,
2203 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2204 if (err < 0)
2205 return err;
2206 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2207 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2208 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2209 if (err < 0)
2210 return err;
2211 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2212 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2213 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2214 if (err < 0)
2215 return err;
2216 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2217 snd_pcm_hw_rule_div, NULL,
2218 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2219 if (err < 0)
2220 return err;
2221 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2222 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2223 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2224 if (err < 0)
2225 return err;
2226 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2227 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2228 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2229 if (err < 0)
2230 return err;
2231 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2232 snd_pcm_hw_rule_div, NULL,
2233 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2234 if (err < 0)
2235 return err;
2236 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2237 snd_pcm_hw_rule_div, NULL,
2238 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2239 if (err < 0)
2240 return err;
2241 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2242 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2243 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2244 if (err < 0)
2245 return err;
2246 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2247 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2248 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2249 if (err < 0)
2250 return err;
2251 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2252 snd_pcm_hw_rule_mul, NULL,
2253 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2254 if (err < 0)
2255 return err;
2256 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2257 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2258 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2259 if (err < 0)
2260 return err;
2261 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2262 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2263 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2264 if (err < 0)
2265 return err;
2266 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2267 snd_pcm_hw_rule_muldivk, (void*) 8,
2268 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2269 if (err < 0)
2270 return err;
2271 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2272 snd_pcm_hw_rule_muldivk, (void*) 8,
2273 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2274 if (err < 0)
2275 return err;
2276 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2277 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2278 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2279 if (err < 0)
2280 return err;
2281 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2282 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2283 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2284 if (err < 0)
2285 return err;
2286 return 0;
2287}
2288
877211f5 2289int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 2290{
877211f5
TI		 2291 struct snd_pcm_runtime *runtime = substream->runtime;
2292 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 2293 int err;
2294 unsigned int mask = 0;
2295
2296 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2297 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2298 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2299 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
63825f3a 2300 if (hw_support_mmap(substream)) {
1da177e4
LT		 2301 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2302 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2303 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2304 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2305 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2306 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2307 }
2308 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 2309 if (err < 0)
2310 return err;
1da177e4
LT		 2311
2312 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 2313 if (err < 0)
2314 return err;
1da177e4
LT		 2315
2316 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 2317 if (err < 0)
2318 return err;
1da177e4
LT		 2319
2320 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2321 hw->channels_min, hw->channels_max);
7eaa943c
TI		 2322 if (err < 0)
2323 return err;
1da177e4
LT		 2324
2325 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2326 hw->rate_min, hw->rate_max);
8b90ca08
GL		 2327 if (err < 0)
2328 return err;
1da177e4
LT		 2329
2330 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2331 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 2332 if (err < 0)
2333 return err;
1da177e4
LT		 2334
2335 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2336 hw->periods_min, hw->periods_max);
7eaa943c
TI		 2337 if (err < 0)
2338 return err;
1da177e4
LT		 2339
2340 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2341 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 2342 if (err < 0)
2343 return err;
1da177e4
LT		 2344
2345 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2346 snd_pcm_hw_rule_buffer_bytes_max, substream,
2347 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2348 if (err < 0)
2349 return err;
2350
2351 /* FIXME: remove */
2352 if (runtime->dma_bytes) {
2353 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c 2354 if (err < 0)
6cf95152 2355 return err;
1da177e4
LT		 2356 }
2357
2358 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2359 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2360 snd_pcm_hw_rule_rate, hw,
2361 SNDRV_PCM_HW_PARAM_RATE, -1);
2362 if (err < 0)
2363 return err;
2364 }
2365
2366 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2367 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2368
2369 return 0;
2370}
2371
3bf75f9b 2372static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2373{
1da177e4 2374 snd_pcm_unlink(substream);
3bf75f9b
TI		 2375}
2376
2377void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2378{
0df63e44
TI		 2379 substream->ref_count--;
2380 if (substream->ref_count > 0)
2381 return;
2382
3bf75f9b 2383 snd_pcm_drop(substream);
3bf75f9b 2384 if (substream->hw_opened) {
094435d4
TI		 2385 if (substream->ops->hw_free &&
2386 substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
1da177e4
LT		 2387 substream->ops->hw_free(substream);
2388 substream->ops->close(substream);
3bf75f9b 2389 substream->hw_opened = 0;
1da177e4 2390 }
8699a0b6
TI		 2391 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2392 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2393 if (substream->pcm_release) {
2394 substream->pcm_release(substream);
2395 substream->pcm_release = NULL;
2396 }
3bf75f9b
TI		 2397 snd_pcm_detach_substream(substream);
2398}
2399
e88e8ae6
TI		 2400EXPORT_SYMBOL(snd_pcm_release_substream);
2401
3bf75f9b
TI		 2402int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2403 struct file *file,
2404 struct snd_pcm_substream **rsubstream)
2405{
2406 struct snd_pcm_substream *substream;
2407 int err;
2408
2409 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2410 if (err < 0)
2411 return err;
0df63e44
TI		 2412 if (substream->ref_count > 1) {
2413 *rsubstream = substream;
2414 return 0;
2415 }
2416
3bf75f9b
TI		 2417 err = snd_pcm_hw_constraints_init(substream);
2418 if (err < 0) {
09e56df8 2419 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
3bf75f9b
TI		 2420 goto error;
2421 }
2422
2423 if ((err = substream->ops->open(substream)) < 0)
2424 goto error;
2425
2426 substream->hw_opened = 1;
2427
2428 err = snd_pcm_hw_constraints_complete(substream);
2429 if (err < 0) {
09e56df8 2430 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
3bf75f9b
TI		 2431 goto error;
2432 }
2433
2434 *rsubstream = substream;
1da177e4 2435 return 0;
3bf75f9b
TI		 2436
2437 error:
2438 snd_pcm_release_substream(substream);
2439 return err;
1da177e4
LT		 2440}
2441
e88e8ae6
TI		 2442EXPORT_SYMBOL(snd_pcm_open_substream);
2443
1da177e4 2444static int snd_pcm_open_file(struct file *file,
877211f5 2445 struct snd_pcm *pcm,
ffd3d5c6 2446 int stream)
1da177e4 2447{
877211f5
TI		 2448 struct snd_pcm_file *pcm_file;
2449 struct snd_pcm_substream *substream;
3bf75f9b 2450 int err;
1da177e4 2451
3bf75f9b
TI		 2452 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2453 if (err < 0)
2454 return err;
2455
548a648b
TI		 2456 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2457 if (pcm_file == NULL) {
2458 snd_pcm_release_substream(substream);
2459 return -ENOMEM;
2460 }
2461 pcm_file->substream = substream;
2462 if (substream->ref_count == 1) {
0df63e44
TI		 2463 substream->file = pcm_file;
2464 substream->pcm_release = pcm_release_private;
1da177e4 2465 }
1da177e4 2466 file->private_data = pcm_file;
ffd3d5c6 2467
1da177e4
LT		 2468 return 0;
2469}
2470
f87135f5
CL		 2471static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2472{
2473 struct snd_pcm *pcm;
02f4865f
TI		 2474 int err = nonseekable_open(inode, file);
2475 if (err < 0)
2476 return err;
f87135f5
CL		 2477 pcm = snd_lookup_minor_data(iminor(inode),
2478 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd 2479 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
8bb4d9ce
TI		 2480 if (pcm)
2481 snd_card_unref(pcm->card);
a0830dbd 2482 return err;
f87135f5
CL		 2483}
2484
2485static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2486{
877211f5 2487 struct snd_pcm *pcm;
02f4865f
TI		 2488 int err = nonseekable_open(inode, file);
2489 if (err < 0)
2490 return err;
f87135f5
CL		 2491 pcm = snd_lookup_minor_data(iminor(inode),
2492 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd 2493 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
8bb4d9ce
TI		 2494 if (pcm)
2495 snd_card_unref(pcm->card);
a0830dbd 2496 return err;
f87135f5
CL		 2497}
2498
2499static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2500{
2501 int err;
1da177e4
LT		 2502 wait_queue_t wait;
2503
1da177e4
LT		 2504 if (pcm == NULL) {
2505 err = -ENODEV;
2506 goto __error1;
2507 }
2508 err = snd_card_file_add(pcm->card, file);
2509 if (err < 0)
2510 goto __error1;
2511 if (!try_module_get(pcm->card->module)) {
2512 err = -EFAULT;
2513 goto __error2;
2514 }
2515 init_waitqueue_entry(&wait, current);
2516 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2517 mutex_lock(&pcm->open_mutex);
1da177e4 2518 while (1) {
ffd3d5c6 2519 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2520 if (err >= 0)
2521 break;
2522 if (err == -EAGAIN) {
2523 if (file->f_flags & O_NONBLOCK) {
2524 err = -EBUSY;
2525 break;
2526 }
2527 } else
2528 break;
2529 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2530 mutex_unlock(&pcm->open_mutex);
1da177e4 2531 schedule();
1a60d4c5 2532 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2533 if (pcm->card->shutdown) {
2534 err = -ENODEV;
2535 break;
2536 }
1da177e4
LT		 2537 if (signal_pending(current)) {
2538 err = -ERESTARTSYS;
2539 break;
2540 }
2541 }
2542 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2543 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2544 if (err < 0)
2545 goto __error;
2546 return err;
2547
2548 __error:
2549 module_put(pcm->card->module);
2550 __error2:
2551 snd_card_file_remove(pcm->card, file);
2552 __error1:
2553 return err;
2554}
2555
2556static int snd_pcm_release(struct inode *inode, struct file *file)
2557{
877211f5
TI		 2558 struct snd_pcm *pcm;
2559 struct snd_pcm_substream *substream;
2560 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2561
2562 pcm_file = file->private_data;
2563 substream = pcm_file->substream;
7eaa943c
TI		 2564 if (snd_BUG_ON(!substream))
2565 return -ENXIO;
1da177e4 2566 pcm = substream->pcm;
1a60d4c5 2567 mutex_lock(&pcm->open_mutex);
3bf75f9b 2568 snd_pcm_release_substream(substream);
548a648b 2569 kfree(pcm_file);
1a60d4c5 2570 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2571 wake_up(&pcm->open_wait);
2572 module_put(pcm->card->module);
2573 snd_card_file_remove(pcm->card, file);
2574 return 0;
2575}
2576
f839cc1c
TI		 2577/* check and update PCM state; return 0 or a negative error
2578 * call this inside PCM lock
2579 */
2580static int do_pcm_hwsync(struct snd_pcm_substream *substream)
2581{
2582 switch (substream->runtime->status->state) {
2583 case SNDRV_PCM_STATE_DRAINING:
2584 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2585 return -EBADFD;
2586 /* Fall through */
2587 case SNDRV_PCM_STATE_RUNNING:
2588 return snd_pcm_update_hw_ptr(substream);
2589 case SNDRV_PCM_STATE_PREPARED:
2590 case SNDRV_PCM_STATE_PAUSED:
2591 return 0;
2592 case SNDRV_PCM_STATE_SUSPENDED:
2593 return -ESTRPIPE;
2594 case SNDRV_PCM_STATE_XRUN:
2595 return -EPIPE;
2596 default:
2597 return -EBADFD;
2598 }
2599}
2600
9027c463
TI		 2601/* update to the given appl_ptr and call ack callback if needed;
2602 * when an error is returned, take back to the original value
2603 */
2604static int apply_appl_ptr(struct snd_pcm_substream *substream,
2605 snd_pcm_uframes_t appl_ptr)
2606{
2607 struct snd_pcm_runtime *runtime = substream->runtime;
2608 snd_pcm_uframes_t old_appl_ptr = runtime->control->appl_ptr;
2609 int ret;
2610
2611 runtime->control->appl_ptr = appl_ptr;
2612 if (substream->ops->ack) {
2613 ret = substream->ops->ack(substream);
2614 if (ret < 0) {
2615 runtime->control->appl_ptr = old_appl_ptr;
2616 return ret;
2617 }
2618 }
2619 return 0;
2620}
2621
2622/* increase the appl_ptr; returns the processed frames or a negative error */
e0327a0f
TI		 2623static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
2624 snd_pcm_uframes_t frames,
2625 snd_pcm_sframes_t avail)
2626{
2627 struct snd_pcm_runtime *runtime = substream->runtime;
2628 snd_pcm_sframes_t appl_ptr;
9027c463 2629 int ret;
e0327a0f
TI		 2630
2631 if (avail <= 0)
2632 return 0;
2633 if (frames > (snd_pcm_uframes_t)avail)
2634 frames = avail;
2635 appl_ptr = runtime->control->appl_ptr + frames;
2636 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2637 appl_ptr -= runtime->boundary;
9027c463
TI		 2638 ret = apply_appl_ptr(substream, appl_ptr);
2639 return ret < 0 ? ret : frames;
e0327a0f
TI		 2640}
2641
9027c463 2642/* decrease the appl_ptr; returns the processed frames or a negative error */
e0327a0f
TI		 2643static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
2644 snd_pcm_uframes_t frames,
2645 snd_pcm_sframes_t avail)
2646{
2647 struct snd_pcm_runtime *runtime = substream->runtime;
2648 snd_pcm_sframes_t appl_ptr;
9027c463 2649 int ret;
e0327a0f
TI		 2650
2651 if (avail <= 0)
2652 return 0;
2653 if (frames > (snd_pcm_uframes_t)avail)
2654 frames = avail;
2655 appl_ptr = runtime->control->appl_ptr - frames;
2656 if (appl_ptr < 0)
2657 appl_ptr += runtime->boundary;
9027c463
TI		 2658 ret = apply_appl_ptr(substream, appl_ptr);
2659 return ret < 0 ? ret : frames;
e0327a0f
TI		 2660}
2661
877211f5
TI		 2662static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2663 snd_pcm_uframes_t frames)
1da177e4 2664{
877211f5 2665 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 2666 snd_pcm_sframes_t ret;
1da177e4
LT		 2667
2668 if (frames == 0)
2669 return 0;
2670
2671 snd_pcm_stream_lock_irq(substream);
f839cc1c 2672 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2673 if (!ret)
2674 ret = rewind_appl_ptr(substream, frames,
2675 snd_pcm_playback_hw_avail(runtime));
1da177e4
LT		 2676 snd_pcm_stream_unlock_irq(substream);
2677 return ret;
2678}
2679
877211f5
TI		 2680static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2681 snd_pcm_uframes_t frames)
1da177e4 2682{
877211f5 2683 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 2684 snd_pcm_sframes_t ret;
1da177e4
LT		 2685
2686 if (frames == 0)
2687 return 0;
2688
2689 snd_pcm_stream_lock_irq(substream);
f839cc1c 2690 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2691 if (!ret)
2692 ret = rewind_appl_ptr(substream, frames,
2693 snd_pcm_capture_hw_avail(runtime));
1da177e4
LT		 2694 snd_pcm_stream_unlock_irq(substream);
2695 return ret;
2696}
2697
877211f5
TI		 2698static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2699 snd_pcm_uframes_t frames)
1da177e4 2700{
877211f5 2701 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 2702 snd_pcm_sframes_t ret;
1da177e4
LT		 2703
2704 if (frames == 0)
2705 return 0;
2706
2707 snd_pcm_stream_lock_irq(substream);
f839cc1c 2708 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2709 if (!ret)
2710 ret = forward_appl_ptr(substream, frames,
2711 snd_pcm_playback_avail(runtime));
1da177e4
LT		 2712 snd_pcm_stream_unlock_irq(substream);
2713 return ret;
2714}
2715
877211f5
TI		 2716static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2717 snd_pcm_uframes_t frames)
1da177e4 2718{
877211f5 2719 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 2720 snd_pcm_sframes_t ret;
1da177e4
LT		 2721
2722 if (frames == 0)
2723 return 0;
2724
2725 snd_pcm_stream_lock_irq(substream);
f839cc1c 2726 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2727 if (!ret)
2728 ret = forward_appl_ptr(substream, frames,
2729 snd_pcm_capture_avail(runtime));
1da177e4
LT		 2730 snd_pcm_stream_unlock_irq(substream);
2731 return ret;
2732}
2733
877211f5 2734static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2735{
1da177e4
LT		 2736 int err;
2737
2738 snd_pcm_stream_lock_irq(substream);
f839cc1c 2739 err = do_pcm_hwsync(substream);
1da177e4
LT		 2740 snd_pcm_stream_unlock_irq(substream);
2741 return err;
2742}
2743
c2c86a97 2744static snd_pcm_sframes_t snd_pcm_delay(struct snd_pcm_substream *substream)
1da177e4 2745{
877211f5 2746 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2747 int err;
2748 snd_pcm_sframes_t n = 0;
2749
2750 snd_pcm_stream_lock_irq(substream);
f839cc1c
TI		 2751 err = do_pcm_hwsync(substream);
2752 if (!err) {
1da177e4
LT		 2753 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2754 n = snd_pcm_playback_hw_avail(runtime);
2755 else
2756 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2757 n += runtime->delay;
1da177e4
LT		 2758 }
2759 snd_pcm_stream_unlock_irq(substream);
c2c86a97 2760 return err < 0 ? err : n;
1da177e4
LT		 2761}
2762
877211f5
TI		 2763static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2764 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2765{
877211f5
TI		 2766 struct snd_pcm_runtime *runtime = substream->runtime;
2767 struct snd_pcm_sync_ptr sync_ptr;
2768 volatile struct snd_pcm_mmap_status *status;
2769 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2770 int err;
2771
2772 memset(&sync_ptr, 0, sizeof(sync_ptr));
2773 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2774 return -EFAULT;
877211f5 2775 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2776 return -EFAULT;
2777 status = runtime->status;
2778 control = runtime->control;
2779 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2780 err = snd_pcm_hwsync(substream);
2781 if (err < 0)
2782 return err;
2783 }
2784 snd_pcm_stream_lock_irq(substream);
9027c463
TI		 2785 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
2786 err = apply_appl_ptr(substream, sync_ptr.c.control.appl_ptr);
2787 if (err < 0) {
2788 snd_pcm_stream_unlock_irq(substream);
2789 return err;
2790 }
2791 } else {
1da177e4 2792 sync_ptr.c.control.appl_ptr = control->appl_ptr;
9027c463 2793 }
1da177e4
LT		 2794 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2795 control->avail_min = sync_ptr.c.control.avail_min;
2796 else
2797 sync_ptr.c.control.avail_min = control->avail_min;
2798 sync_ptr.s.status.state = status->state;
2799 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2800 sync_ptr.s.status.tstamp = status->tstamp;
2801 sync_ptr.s.status.suspended_state = status->suspended_state;
2802 snd_pcm_stream_unlock_irq(substream);
2803 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2804 return -EFAULT;
2805 return 0;
2806}
b751eef1
JK		 2807
2808static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2809{
2810 struct snd_pcm_runtime *runtime = substream->runtime;
2811 int arg;
2812
2813 if (get_user(arg, _arg))
2814 return -EFAULT;
2815 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2816 return -EINVAL;
2408c219 2817 runtime->tstamp_type = arg;
b751eef1
JK		 2818 return 0;
2819}
1da177e4 2820
0df63e44
TI		 2821static int snd_pcm_common_ioctl1(struct file *file,
2822 struct snd_pcm_substream *substream,
1da177e4
LT		 2823 unsigned int cmd, void __user *arg)
2824{
1da177e4
LT		 2825 switch (cmd) {
2826 case SNDRV_PCM_IOCTL_PVERSION:
2827 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2828 case SNDRV_PCM_IOCTL_INFO:
2829 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2830 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2831 return 0;
b751eef1
JK		 2832 case SNDRV_PCM_IOCTL_TTSTAMP:
2833 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2834 case SNDRV_PCM_IOCTL_HW_REFINE:
2835 return snd_pcm_hw_refine_user(substream, arg);
2836 case SNDRV_PCM_IOCTL_HW_PARAMS:
2837 return snd_pcm_hw_params_user(substream, arg);
2838 case SNDRV_PCM_IOCTL_HW_FREE:
2839 return snd_pcm_hw_free(substream);
2840 case SNDRV_PCM_IOCTL_SW_PARAMS:
2841 return snd_pcm_sw_params_user(substream, arg);
2842 case SNDRV_PCM_IOCTL_STATUS:
38ca2a4d
PLB		 2843 return snd_pcm_status_user(substream, arg, false);
2844 case SNDRV_PCM_IOCTL_STATUS_EXT:
2845 return snd_pcm_status_user(substream, arg, true);
1da177e4
LT		 2846 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2847 return snd_pcm_channel_info_user(substream, arg);
2848 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2849 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2850 case SNDRV_PCM_IOCTL_RESET:
2851 return snd_pcm_reset(substream);
2852 case SNDRV_PCM_IOCTL_START:
c2c86a97 2853 return snd_pcm_start_lock_irq(substream);
1da177e4
LT		 2854 case SNDRV_PCM_IOCTL_LINK:
2855 return snd_pcm_link(substream, (int)(unsigned long) arg);
2856 case SNDRV_PCM_IOCTL_UNLINK:
2857 return snd_pcm_unlink(substream);
2858 case SNDRV_PCM_IOCTL_RESUME:
2859 return snd_pcm_resume(substream);
2860 case SNDRV_PCM_IOCTL_XRUN:
2861 return snd_pcm_xrun(substream);
2862 case SNDRV_PCM_IOCTL_HWSYNC:
2863 return snd_pcm_hwsync(substream);
2864 case SNDRV_PCM_IOCTL_DELAY:
c2c86a97
TI		 2865 {
2866 snd_pcm_sframes_t delay = snd_pcm_delay(substream);
2867 snd_pcm_sframes_t __user *res = arg;
2868
2869 if (delay < 0)
2870 return delay;
2871 if (put_user(delay, res))
2872 return -EFAULT;
2873 return 0;
2874 }
1da177e4
LT		 2875 case SNDRV_PCM_IOCTL_SYNC_PTR:
2876 return snd_pcm_sync_ptr(substream, arg);
59d48582 2877#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2878 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2879 return snd_pcm_hw_refine_old_user(substream, arg);
2880 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2881 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2882#endif
1da177e4 2883 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2884 return snd_pcm_drain(substream, file);
1da177e4
LT		 2885 case SNDRV_PCM_IOCTL_DROP:
2886 return snd_pcm_drop(substream);
e661d0dd
TI		 2887 case SNDRV_PCM_IOCTL_PAUSE:
2888 {
2889 int res;
2890 snd_pcm_stream_lock_irq(substream);
2891 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2892 snd_pcm_stream_unlock_irq(substream);
2893 return res;
2894 }
1da177e4 2895 }
09e56df8 2896 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
1da177e4
LT		 2897 return -ENOTTY;
2898}
2899
0df63e44
TI		 2900static int snd_pcm_playback_ioctl1(struct file *file,
2901 struct snd_pcm_substream *substream,
1da177e4
LT		 2902 unsigned int cmd, void __user *arg)
2903{
7eaa943c
TI		 2904 if (snd_BUG_ON(!substream))
2905 return -ENXIO;
2906 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2907 return -EINVAL;
1da177e4
LT		 2908 switch (cmd) {
2909 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2910 {
877211f5
TI		 2911 struct snd_xferi xferi;
2912 struct snd_xferi __user *_xferi = arg;
2913 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2914 snd_pcm_sframes_t result;
2915 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2916 return -EBADFD;
2917 if (put_user(0, &_xferi->result))
2918 return -EFAULT;
2919 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2920 return -EFAULT;
2921 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2922 __put_user(result, &_xferi->result);
2923 return result < 0 ? result : 0;
2924 }
2925 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2926 {
877211f5
TI		 2927 struct snd_xfern xfern;
2928 struct snd_xfern __user *_xfern = arg;
2929 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2930 void __user **bufs;
2931 snd_pcm_sframes_t result;
2932 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2933 return -EBADFD;
2934 if (runtime->channels > 128)
2935 return -EINVAL;
2936 if (put_user(0, &_xfern->result))
2937 return -EFAULT;
2938 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2939 return -EFAULT;
ef44a1ec
LZ		 2940
2941 bufs = memdup_user(xfern.bufs,
2942 sizeof(void *) * runtime->channels);
2943 if (IS_ERR(bufs))
2944 return PTR_ERR(bufs);
1da177e4
LT		 2945 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2946 kfree(bufs);
2947 __put_user(result, &_xfern->result);
2948 return result < 0 ? result : 0;
2949 }
2950 case SNDRV_PCM_IOCTL_REWIND:
2951 {
2952 snd_pcm_uframes_t frames;
2953 snd_pcm_uframes_t __user *_frames = arg;
2954 snd_pcm_sframes_t result;
2955 if (get_user(frames, _frames))
2956 return -EFAULT;
2957 if (put_user(0, _frames))
2958 return -EFAULT;
2959 result = snd_pcm_playback_rewind(substream, frames);
2960 __put_user(result, _frames);
2961 return result < 0 ? result : 0;
2962 }
2963 case SNDRV_PCM_IOCTL_FORWARD:
2964 {
2965 snd_pcm_uframes_t frames;
2966 snd_pcm_uframes_t __user *_frames = arg;
2967 snd_pcm_sframes_t result;
2968 if (get_user(frames, _frames))
2969 return -EFAULT;
2970 if (put_user(0, _frames))
2971 return -EFAULT;
2972 result = snd_pcm_playback_forward(substream, frames);
2973 __put_user(result, _frames);
2974 return result < 0 ? result : 0;
2975 }
1da177e4 2976 }
0df63e44 2977 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2978}
2979
0df63e44
TI		 2980static int snd_pcm_capture_ioctl1(struct file *file,
2981 struct snd_pcm_substream *substream,
1da177e4
LT		 2982 unsigned int cmd, void __user *arg)
2983{
7eaa943c
TI		 2984 if (snd_BUG_ON(!substream))
2985 return -ENXIO;
2986 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2987 return -EINVAL;
1da177e4
LT		 2988 switch (cmd) {
2989 case SNDRV_PCM_IOCTL_READI_FRAMES:
2990 {
877211f5
TI		 2991 struct snd_xferi xferi;
2992 struct snd_xferi __user *_xferi = arg;
2993 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2994 snd_pcm_sframes_t result;
2995 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2996 return -EBADFD;
2997 if (put_user(0, &_xferi->result))
2998 return -EFAULT;
2999 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
3000 return -EFAULT;
3001 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
3002 __put_user(result, &_xferi->result);
3003 return result < 0 ? result : 0;
3004 }
3005 case SNDRV_PCM_IOCTL_READN_FRAMES:
3006 {
877211f5
TI		 3007 struct snd_xfern xfern;
3008 struct snd_xfern __user *_xfern = arg;
3009 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 3010 void *bufs;
3011 snd_pcm_sframes_t result;
3012 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3013 return -EBADFD;
3014 if (runtime->channels > 128)
3015 return -EINVAL;
3016 if (put_user(0, &_xfern->result))
3017 return -EFAULT;
3018 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
3019 return -EFAULT;
ef44a1ec
LZ		 3020
3021 bufs = memdup_user(xfern.bufs,
3022 sizeof(void *) * runtime->channels);
3023 if (IS_ERR(bufs))
3024 return PTR_ERR(bufs);
1da177e4
LT		 3025 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
3026 kfree(bufs);
3027 __put_user(result, &_xfern->result);
3028 return result < 0 ? result : 0;
3029 }
3030 case SNDRV_PCM_IOCTL_REWIND:
3031 {
3032 snd_pcm_uframes_t frames;
3033 snd_pcm_uframes_t __user *_frames = arg;
3034 snd_pcm_sframes_t result;
3035 if (get_user(frames, _frames))
3036 return -EFAULT;
3037 if (put_user(0, _frames))
3038 return -EFAULT;
3039 result = snd_pcm_capture_rewind(substream, frames);
3040 __put_user(result, _frames);
3041 return result < 0 ? result : 0;
3042 }
3043 case SNDRV_PCM_IOCTL_FORWARD:
3044 {
3045 snd_pcm_uframes_t frames;
3046 snd_pcm_uframes_t __user *_frames = arg;
3047 snd_pcm_sframes_t result;
3048 if (get_user(frames, _frames))
3049 return -EFAULT;
3050 if (put_user(0, _frames))
3051 return -EFAULT;
3052 result = snd_pcm_capture_forward(substream, frames);
3053 __put_user(result, _frames);
3054 return result < 0 ? result : 0;
3055 }
3056 }
0df63e44 3057 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 3058}
3059
877211f5
TI		 3060static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
3061 unsigned long arg)
1da177e4 3062{
877211f5 3063 struct snd_pcm_file *pcm_file;
1da177e4
LT		 3064
3065 pcm_file = file->private_data;
3066
3067 if (((cmd >> 8) & 0xff) != 'A')
3068 return -ENOTTY;
3069
0df63e44
TI		 3070 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
3071 (void __user *)arg);
1da177e4
LT		 3072}
3073
877211f5
TI		 3074static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
3075 unsigned long arg)
1da177e4 3076{
877211f5 3077 struct snd_pcm_file *pcm_file;
1da177e4
LT		 3078
3079 pcm_file = file->private_data;
3080
3081 if (((cmd >> 8) & 0xff) != 'A')
3082 return -ENOTTY;
3083
0df63e44
TI		 3084 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
3085 (void __user *)arg);
1da177e4
LT		 3086}
3087
c2c86a97
TI		 3088/**
3089 * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space
3090 * @substream: PCM substream
3091 * @cmd: IOCTL cmd
3092 * @arg: IOCTL argument
3093 *
3094 * The function is provided primarily for OSS layer and USB gadget drivers,
3095 * and it allows only the limited set of ioctls (hw_params, sw_params,
3096 * prepare, start, drain, drop, forward).
3097 */
bf1bbb5a
TI		 3098int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
3099 unsigned int cmd, void *arg)
1da177e4 3100{
c2c86a97
TI		 3101 snd_pcm_uframes_t *frames = arg;
3102 snd_pcm_sframes_t result;
1da177e4 3103
c2c86a97
TI		 3104 switch (cmd) {
3105 case SNDRV_PCM_IOCTL_FORWARD:
3106 {
3107 /* provided only for OSS; capture-only and no value returned */
3108 if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
3109 return -EINVAL;
3110 result = snd_pcm_capture_forward(substream, *frames);
3111 return result < 0 ? result : 0;
3112 }
3113 case SNDRV_PCM_IOCTL_HW_PARAMS:
3114 return snd_pcm_hw_params(substream, arg);
3115 case SNDRV_PCM_IOCTL_SW_PARAMS:
3116 return snd_pcm_sw_params(substream, arg);
3117 case SNDRV_PCM_IOCTL_PREPARE:
3118 return snd_pcm_prepare(substream, NULL);
3119 case SNDRV_PCM_IOCTL_START:
3120 return snd_pcm_start_lock_irq(substream);
3121 case SNDRV_PCM_IOCTL_DRAIN:
3122 return snd_pcm_drain(substream, NULL);
3123 case SNDRV_PCM_IOCTL_DROP:
3124 return snd_pcm_drop(substream);
3125 case SNDRV_PCM_IOCTL_DELAY:
3126 {
3127 result = snd_pcm_delay(substream);
3128 if (result < 0)
3129 return result;
3130 *frames = result;
3131 return 0;
3132 }
1da177e4 3133 default:
c2c86a97 3134 return -EINVAL;
1da177e4
LT		 3135 }
3136}
e88e8ae6
TI		 3137EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3138
877211f5
TI		 3139static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3140 loff_t * offset)
1da177e4 3141{
877211f5
TI		 3142 struct snd_pcm_file *pcm_file;
3143 struct snd_pcm_substream *substream;
3144 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3145 snd_pcm_sframes_t result;
3146
3147 pcm_file = file->private_data;
3148 substream = pcm_file->substream;
7eaa943c
TI		 3149 if (PCM_RUNTIME_CHECK(substream))
3150 return -ENXIO;
1da177e4
LT		 3151 runtime = substream->runtime;
3152 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3153 return -EBADFD;
3154 if (!frame_aligned(runtime, count))
3155 return -EINVAL;
3156 count = bytes_to_frames(runtime, count);
3157 result = snd_pcm_lib_read(substream, buf, count);
3158 if (result > 0)
3159 result = frames_to_bytes(runtime, result);
3160 return result;
3161}
3162
877211f5
TI		 3163static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3164 size_t count, loff_t * offset)
1da177e4 3165{
877211f5
TI		 3166 struct snd_pcm_file *pcm_file;
3167 struct snd_pcm_substream *substream;
3168 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3169 snd_pcm_sframes_t result;
3170
3171 pcm_file = file->private_data;
3172 substream = pcm_file->substream;
7eaa943c
TI		 3173 if (PCM_RUNTIME_CHECK(substream))
3174 return -ENXIO;
1da177e4 3175 runtime = substream->runtime;
7eaa943c
TI		 3176 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3177 return -EBADFD;
3178 if (!frame_aligned(runtime, count))
3179 return -EINVAL;
1da177e4
LT		 3180 count = bytes_to_frames(runtime, count);
3181 result = snd_pcm_lib_write(substream, buf, count);
3182 if (result > 0)
3183 result = frames_to_bytes(runtime, result);
1da177e4
LT		 3184 return result;
3185}
3186
1c65d986 3187static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
1da177e4 3188{
877211f5
TI		 3189 struct snd_pcm_file *pcm_file;
3190 struct snd_pcm_substream *substream;
3191 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3192 snd_pcm_sframes_t result;
3193 unsigned long i;
3194 void __user **bufs;
3195 snd_pcm_uframes_t frames;
3196
ee0b3e67 3197 pcm_file = iocb->ki_filp->private_data;
1da177e4 3198 substream = pcm_file->substream;
7eaa943c
TI		 3199 if (PCM_RUNTIME_CHECK(substream))
3200 return -ENXIO;
1da177e4
LT		 3201 runtime = substream->runtime;
3202 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3203 return -EBADFD;
1c65d986
AV		 3204 if (!iter_is_iovec(to))
3205 return -EINVAL;
3206 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
1da177e4 3207 return -EINVAL;
1c65d986 3208 if (!frame_aligned(runtime, to->iov->iov_len))
1da177e4 3209 return -EINVAL;
1c65d986
AV		 3210 frames = bytes_to_samples(runtime, to->iov->iov_len);
3211 bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL);
1da177e4
LT		 3212 if (bufs == NULL)
3213 return -ENOMEM;
1c65d986
AV		 3214 for (i = 0; i < to->nr_segs; ++i)
3215 bufs[i] = to->iov[i].iov_base;
1da177e4
LT		 3216 result = snd_pcm_lib_readv(substream, bufs, frames);
3217 if (result > 0)
3218 result = frames_to_bytes(runtime, result);
3219 kfree(bufs);
3220 return result;
3221}
3222
1c65d986 3223static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
1da177e4 3224{
877211f5
TI		 3225 struct snd_pcm_file *pcm_file;
3226 struct snd_pcm_substream *substream;
3227 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3228 snd_pcm_sframes_t result;
3229 unsigned long i;
3230 void __user **bufs;
3231 snd_pcm_uframes_t frames;
3232
ee0b3e67 3233 pcm_file = iocb->ki_filp->private_data;
1da177e4 3234 substream = pcm_file->substream;
7eaa943c
TI		 3235 if (PCM_RUNTIME_CHECK(substream))
3236 return -ENXIO;
1da177e4 3237 runtime = substream->runtime;
7eaa943c
TI		 3238 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3239 return -EBADFD;
1c65d986
AV		 3240 if (!iter_is_iovec(from))
3241 return -EINVAL;
3242 if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
3243 !frame_aligned(runtime, from->iov->iov_len))
7eaa943c 3244 return -EINVAL;
1c65d986
AV		 3245 frames = bytes_to_samples(runtime, from->iov->iov_len);
3246 bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL);
1da177e4
LT		 3247 if (bufs == NULL)
3248 return -ENOMEM;
1c65d986
AV		 3249 for (i = 0; i < from->nr_segs; ++i)
3250 bufs[i] = from->iov[i].iov_base;
1da177e4
LT		 3251 result = snd_pcm_lib_writev(substream, bufs, frames);
3252 if (result > 0)
3253 result = frames_to_bytes(runtime, result);
3254 kfree(bufs);
1da177e4
LT		 3255 return result;
3256}
3257
3258static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3259{
877211f5
TI		 3260 struct snd_pcm_file *pcm_file;
3261 struct snd_pcm_substream *substream;
3262 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3263 unsigned int mask;
3264 snd_pcm_uframes_t avail;
3265
3266 pcm_file = file->private_data;
3267
3268 substream = pcm_file->substream;
7eaa943c 3269 if (PCM_RUNTIME_CHECK(substream))
e099aeea 3270 return POLLOUT | POLLWRNORM | POLLERR;
1da177e4
LT		 3271 runtime = substream->runtime;
3272
3273 poll_wait(file, &runtime->sleep, wait);
3274
3275 snd_pcm_stream_lock_irq(substream);
3276 avail = snd_pcm_playback_avail(runtime);
3277 switch (runtime->status->state) {
3278 case SNDRV_PCM_STATE_RUNNING:
3279 case SNDRV_PCM_STATE_PREPARED:
3280 case SNDRV_PCM_STATE_PAUSED:
3281 if (avail >= runtime->control->avail_min) {
3282 mask = POLLOUT | POLLWRNORM;
3283 break;
3284 }
3285 /* Fall through */
3286 case SNDRV_PCM_STATE_DRAINING:
3287 mask = 0;
3288 break;
3289 default:
3290 mask = POLLOUT | POLLWRNORM | POLLERR;
3291 break;
3292 }
3293 snd_pcm_stream_unlock_irq(substream);
3294 return mask;
3295}
3296
3297static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3298{
877211f5
TI		 3299 struct snd_pcm_file *pcm_file;
3300 struct snd_pcm_substream *substream;
3301 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3302 unsigned int mask;
3303 snd_pcm_uframes_t avail;
3304
3305 pcm_file = file->private_data;
3306
3307 substream = pcm_file->substream;
7eaa943c 3308 if (PCM_RUNTIME_CHECK(substream))
e099aeea 3309 return POLLIN | POLLRDNORM | POLLERR;
1da177e4
LT		 3310 runtime = substream->runtime;
3311
3312 poll_wait(file, &runtime->sleep, wait);
3313
3314 snd_pcm_stream_lock_irq(substream);
3315 avail = snd_pcm_capture_avail(runtime);
3316 switch (runtime->status->state) {
3317 case SNDRV_PCM_STATE_RUNNING:
3318 case SNDRV_PCM_STATE_PREPARED:
3319 case SNDRV_PCM_STATE_PAUSED:
3320 if (avail >= runtime->control->avail_min) {
3321 mask = POLLIN | POLLRDNORM;
3322 break;
3323 }
3324 mask = 0;
3325 break;
3326 case SNDRV_PCM_STATE_DRAINING:
3327 if (avail > 0) {
3328 mask = POLLIN | POLLRDNORM;
3329 break;
3330 }
3331 /* Fall through */
3332 default:
3333 mask = POLLIN | POLLRDNORM | POLLERR;
3334 break;
3335 }
3336 snd_pcm_stream_unlock_irq(substream);
3337 return mask;
3338}
3339
3340/*
3341 * mmap support
3342 */
3343
3344/*
3345 * Only on coherent architectures, we can mmap the status and the control records
3346 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3347 */
3348#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3349/*
3350 * mmap status record
3351 */
11bac800 3352static int snd_pcm_mmap_status_fault(struct vm_fault *vmf)
1da177e4 3353{
11bac800 3354 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3355 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3356
3357 if (substream == NULL)
3ad5afcd 3358 return VM_FAULT_SIGBUS;
1da177e4 3359 runtime = substream->runtime;
3ad5afcd
NP		 3360 vmf->page = virt_to_page(runtime->status);
3361 get_page(vmf->page);
3362 return 0;
1da177e4
LT		 3363}
3364
f0f37e2f 3365static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3366{
3ad5afcd 3367 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3368};
3369
877211f5 3370static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3371 struct vm_area_struct *area)
3372{
1da177e4
LT		 3373 long size;
3374 if (!(area->vm_flags & VM_READ))
3375 return -EINVAL;
1da177e4 3376 size = area->vm_end - area->vm_start;
877211f5 3377 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3378 return -EINVAL;
3379 area->vm_ops = &snd_pcm_vm_ops_status;
3380 area->vm_private_data = substream;
314e51b9 3381 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3382 return 0;
3383}
3384
3385/*
3386 * mmap control record
3387 */
11bac800 3388static int snd_pcm_mmap_control_fault(struct vm_fault *vmf)
1da177e4 3389{
11bac800 3390 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3391 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3392
3393 if (substream == NULL)
3ad5afcd 3394 return VM_FAULT_SIGBUS;
1da177e4 3395 runtime = substream->runtime;
3ad5afcd
NP		 3396 vmf->page = virt_to_page(runtime->control);
3397 get_page(vmf->page);
3398 return 0;
1da177e4
LT		 3399}
3400
f0f37e2f 3401static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3402{
3ad5afcd 3403 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3404};
3405
877211f5 3406static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3407 struct vm_area_struct *area)
3408{
1da177e4
LT		 3409 long size;
3410 if (!(area->vm_flags & VM_READ))
3411 return -EINVAL;
1da177e4 3412 size = area->vm_end - area->vm_start;
877211f5 3413 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3414 return -EINVAL;
3415 area->vm_ops = &snd_pcm_vm_ops_control;
3416 area->vm_private_data = substream;
314e51b9 3417 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3418 return 0;
3419}
3420#else /* ! coherent mmap */
3421/*
3422 * don't support mmap for status and control records.
3423 */
877211f5 3424static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3425 struct vm_area_struct *area)
3426{
3427 return -ENXIO;
3428}
877211f5 3429static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3430 struct vm_area_struct *area)
3431{
3432 return -ENXIO;
3433}
3434#endif /* coherent mmap */
3435
9eb4a067
TI		 3436static inline struct page *
3437snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3438{
3439 void *vaddr = substream->runtime->dma_area + ofs;
3440 return virt_to_page(vaddr);
3441}
3442
1da177e4 3443/*
3ad5afcd 3444 * fault callback for mmapping a RAM page
1da177e4 3445 */
11bac800 3446static int snd_pcm_mmap_data_fault(struct vm_fault *vmf)
1da177e4 3447{
11bac800 3448 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3449 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3450 unsigned long offset;
3451 struct page * page;
1da177e4
LT		 3452 size_t dma_bytes;
3453
3454 if (substream == NULL)
3ad5afcd 3455 return VM_FAULT_SIGBUS;
1da177e4 3456 runtime = substream->runtime;
3ad5afcd 3457 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3458 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3459 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3460 return VM_FAULT_SIGBUS;
9eb4a067 3461 if (substream->ops->page)
1da177e4 3462 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3463 else
3464 page = snd_pcm_default_page_ops(substream, offset);
3465 if (!page)
3466 return VM_FAULT_SIGBUS;
b5810039 3467 get_page(page);
3ad5afcd
NP		 3468 vmf->page = page;
3469 return 0;
1da177e4
LT		 3470}
3471
657b1989
TI		 3472static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3473 .open = snd_pcm_mmap_data_open,
3474 .close = snd_pcm_mmap_data_close,
3475};
3476
3477static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3478 .open = snd_pcm_mmap_data_open,
3479 .close = snd_pcm_mmap_data_close,
3ad5afcd 3480 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3481};
3482
3483/*
3484 * mmap the DMA buffer on RAM
3485 */
30b771cf
TI		 3486
3487/**
3488 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3489 * @substream: PCM substream
3490 * @area: VMA
3491 *
3492 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3493 * this function is invoked implicitly.
3494 */
18a2b962
TI		 3495int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3496 struct vm_area_struct *area)
1da177e4 3497{
314e51b9 3498 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
a5606f85 3499#ifdef CONFIG_GENERIC_ALLOCATOR
05503214
NC		 3500 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3501 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3502 return remap_pfn_range(area, area->vm_start,
3503 substream->dma_buffer.addr >> PAGE_SHIFT,
3504 area->vm_end - area->vm_start, area->vm_page_prot);
3505 }
a5606f85 3506#endif /* CONFIG_GENERIC_ALLOCATOR */
49d776ff 3507#ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
657b1989
TI		 3508 if (!substream->ops->page &&
3509 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3510 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3511 area,
3512 substream->runtime->dma_area,
3513 substream->runtime->dma_addr,
3514 area->vm_end - area->vm_start);
49d776ff 3515#endif /* CONFIG_X86 */
657b1989
TI		 3516 /* mmap with fault handler */
3517 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3518 return 0;
3519}
18a2b962 3520EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3521
3522/*
3523 * mmap the DMA buffer on I/O memory area
3524 */
3525#if SNDRV_PCM_INFO_MMAP_IOMEM
30b771cf
TI		 3526/**
3527 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3528 * @substream: PCM substream
3529 * @area: VMA
3530 *
3531 * When your hardware uses the iomapped pages as the hardware buffer and
3532 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3533 * is supposed to work only on limited architectures.
3534 */
877211f5
TI		 3535int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3536 struct vm_area_struct *area)
1da177e4 3537{
0fe09a45 3538 struct snd_pcm_runtime *runtime = substream->runtime;;
1da177e4 3539
1da177e4 3540 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
0fe09a45 3541 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
1da177e4 3542}
e88e8ae6
TI		 3543
3544EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3545#endif /* SNDRV_PCM_INFO_MMAP */
3546
3547/*
3548 * mmap DMA buffer
3549 */
877211f5 3550int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3551 struct vm_area_struct *area)
3552{
877211f5 3553 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3554 long size;
3555 unsigned long offset;
3556 size_t dma_bytes;
657b1989 3557 int err;
1da177e4
LT		 3558
3559 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3560 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3561 return -EINVAL;
3562 } else {
3563 if (!(area->vm_flags & VM_READ))
3564 return -EINVAL;
3565 }
3566 runtime = substream->runtime;
1da177e4
LT		 3567 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3568 return -EBADFD;
3569 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3570 return -ENXIO;
3571 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3572 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3573 return -EINVAL;
3574 size = area->vm_end - area->vm_start;
3575 offset = area->vm_pgoff << PAGE_SHIFT;
3576 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3577 if ((size_t)size > dma_bytes)
3578 return -EINVAL;
3579 if (offset > dma_bytes - size)
3580 return -EINVAL;
3581
657b1989
TI		 3582 area->vm_ops = &snd_pcm_vm_ops_data;
3583 area->vm_private_data = substream;
1da177e4 3584 if (substream->ops->mmap)
657b1989 3585 err = substream->ops->mmap(substream, area);
1da177e4 3586 else
18a2b962 3587 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3588 if (!err)
3589 atomic_inc(&substream->mmap_count);
3590 return err;
1da177e4
LT		 3591}
3592
e88e8ae6
TI		 3593EXPORT_SYMBOL(snd_pcm_mmap_data);
3594
1da177e4
LT		 3595static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3596{
877211f5
TI		 3597 struct snd_pcm_file * pcm_file;
3598 struct snd_pcm_substream *substream;
1da177e4
LT		 3599 unsigned long offset;
3600
3601 pcm_file = file->private_data;
3602 substream = pcm_file->substream;
7eaa943c
TI		 3603 if (PCM_RUNTIME_CHECK(substream))
3604 return -ENXIO;
1da177e4
LT		 3605
3606 offset = area->vm_pgoff << PAGE_SHIFT;
3607 switch (offset) {
3608 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3609 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3610 return -ENXIO;
3611 return snd_pcm_mmap_status(substream, file, area);
3612 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3613 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3614 return -ENXIO;
3615 return snd_pcm_mmap_control(substream, file, area);
3616 default:
3617 return snd_pcm_mmap_data(substream, file, area);
3618 }
3619 return 0;
3620}
3621
3622static int snd_pcm_fasync(int fd, struct file * file, int on)
3623{
877211f5
TI		 3624 struct snd_pcm_file * pcm_file;
3625 struct snd_pcm_substream *substream;
3626 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3627
3628 pcm_file = file->private_data;
3629 substream = pcm_file->substream;
7eaa943c 3630 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3631 return -ENXIO;
1da177e4 3632 runtime = substream->runtime;
d05468b7 3633 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3634}
3635
3636/*
3637 * ioctl32 compat
3638 */
3639#ifdef CONFIG_COMPAT
3640#include "pcm_compat.c"
3641#else
3642#define snd_pcm_ioctl_compat NULL
3643#endif
3644
3645/*
3646 * To be removed helpers to keep binary compatibility
3647 */
3648
59d48582 3649#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3650#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3651#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3652
877211f5
TI		 3653static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3654 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3655{
3656 unsigned int i;
3657
3658 memset(params, 0, sizeof(*params));
3659 params->flags = oparams->flags;
3660 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3661 params->masks[i].bits[0] = oparams->masks[i];
3662 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3663 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3664 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3665 params->info = oparams->info;
3666 params->msbits = oparams->msbits;
3667 params->rate_num = oparams->rate_num;
3668 params->rate_den = oparams->rate_den;
3669 params->fifo_size = oparams->fifo_size;
3670}
3671
877211f5
TI		 3672static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3673 struct snd_pcm_hw_params *params)
1da177e4
LT		 3674{
3675 unsigned int i;
3676
3677 memset(oparams, 0, sizeof(*oparams));
3678 oparams->flags = params->flags;
3679 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3680 oparams->masks[i] = params->masks[i].bits[0];
3681 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3682 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3683 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3684 oparams->info = params->info;
3685 oparams->msbits = params->msbits;
3686 oparams->rate_num = params->rate_num;
3687 oparams->rate_den = params->rate_den;
3688 oparams->fifo_size = params->fifo_size;
3689}
3690
877211f5
TI		 3691static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3692 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3693{
877211f5
TI		 3694 struct snd_pcm_hw_params *params;
3695 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3696 int err;
3697
3698 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3699 if (!params)
3700 return -ENOMEM;
1da177e4 3701
ef44a1ec
LZ		 3702 oparams = memdup_user(_oparams, sizeof(*oparams));
3703 if (IS_ERR(oparams)) {
3704 err = PTR_ERR(oparams);
1da177e4
LT		 3705 goto out;
3706 }
3707 snd_pcm_hw_convert_from_old_params(params, oparams);
3708 err = snd_pcm_hw_refine(substream, params);
f74ae15f
TS		 3709 if (err < 0)
3710 goto out_old;
3711
3712 err = fixup_unreferenced_params(substream, params);
3713 if (err < 0)
3714 goto out_old;
ef44a1ec 3715
f74ae15f
TS		 3716 snd_pcm_hw_convert_to_old_params(oparams, params);
3717 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3718 err = -EFAULT;
3719out_old:
ef44a1ec 3720 kfree(oparams);
1da177e4
LT		 3721out:
3722 kfree(params);
1da177e4
LT		 3723 return err;
3724}
3725
877211f5
TI		 3726static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3727 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3728{
877211f5
TI		 3729 struct snd_pcm_hw_params *params;
3730 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3731 int err;
3732
3733 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3734 if (!params)
3735 return -ENOMEM;
3736
3737 oparams = memdup_user(_oparams, sizeof(*oparams));
3738 if (IS_ERR(oparams)) {
3739 err = PTR_ERR(oparams);
1da177e4
LT		 3740 goto out;
3741 }
f74ae15f 3742
1da177e4
LT		 3743 snd_pcm_hw_convert_from_old_params(params, oparams);
3744 err = snd_pcm_hw_params(substream, params);
f74ae15f
TS		 3745 if (err < 0)
3746 goto out_old;
ef44a1ec 3747
f74ae15f
TS		 3748 snd_pcm_hw_convert_to_old_params(oparams, params);
3749 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3750 err = -EFAULT;
3751out_old:
ef44a1ec 3752 kfree(oparams);
1da177e4
LT		 3753out:
3754 kfree(params);
1da177e4
LT		 3755 return err;
3756}
59d48582 3757#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3758
7003609b 3759#ifndef CONFIG_MMU
55c63bd2
DG		 3760static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3761 unsigned long addr,
3762 unsigned long len,
3763 unsigned long pgoff,
3764 unsigned long flags)
3765{
3766 struct snd_pcm_file *pcm_file = file->private_data;
3767 struct snd_pcm_substream *substream = pcm_file->substream;
3768 struct snd_pcm_runtime *runtime = substream->runtime;
3769 unsigned long offset = pgoff << PAGE_SHIFT;
3770
3771 switch (offset) {
3772 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3773 return (unsigned long)runtime->status;
3774 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3775 return (unsigned long)runtime->control;
3776 default:
3777 return (unsigned long)runtime->dma_area + offset;
3778 }
7003609b
CC		 3779}
3780#else
55c63bd2 3781# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3782#endif
3783
1da177e4
LT		 3784/*
3785 * Register section
3786 */
3787
9c2e08c5 3788const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3789 {
2af677fc
CL		 3790 .owner = THIS_MODULE,
3791 .write = snd_pcm_write,
1c65d986 3792 .write_iter = snd_pcm_writev,
f87135f5 3793 .open = snd_pcm_playback_open,
2af677fc 3794 .release = snd_pcm_release,
02f4865f 3795 .llseek = no_llseek,
2af677fc
CL		 3796 .poll = snd_pcm_playback_poll,
3797 .unlocked_ioctl = snd_pcm_playback_ioctl,
3798 .compat_ioctl = snd_pcm_ioctl_compat,
3799 .mmap = snd_pcm_mmap,
3800 .fasync = snd_pcm_fasync,
55c63bd2 3801 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3802 },
3803 {
2af677fc
CL		 3804 .owner = THIS_MODULE,
3805 .read = snd_pcm_read,
1c65d986 3806 .read_iter = snd_pcm_readv,
f87135f5 3807 .open = snd_pcm_capture_open,
2af677fc 3808 .release = snd_pcm_release,
02f4865f 3809 .llseek = no_llseek,
2af677fc
CL		 3810 .poll = snd_pcm_capture_poll,
3811 .unlocked_ioctl = snd_pcm_capture_ioctl,
3812 .compat_ioctl = snd_pcm_ioctl_compat,
3813 .mmap = snd_pcm_mmap,
3814 .fasync = snd_pcm_fasync,
55c63bd2 3815 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3816 }
3817};
Linux 6.x block layer and io_uring tree(s)