]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blame - sound/core/pcm_native.c
projects / mirror_ubuntu-jammy-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
UBUNTU: Ubuntu-5.15.0-39.42
[mirror_ubuntu-jammy-kernel.git] / sound / core / pcm_native.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/*
3 * Digital Audio (PCM) abstract layer
c1017a4c 4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 5 */
6
09d94175 7#include <linux/compat.h>
1da177e4 8#include <linux/mm.h>
da155d5b 9#include <linux/module.h>
1da177e4
LT		 10#include <linux/file.h>
11#include <linux/slab.h>
174cd4b1 12#include <linux/sched/signal.h>
1da177e4 13#include <linux/time.h>
e8db0be1 14#include <linux/pm_qos.h>
6cbbfe1c 15#include <linux/io.h>
657b1989 16#include <linux/dma-mapping.h>
7e8edae3 17#include <linux/vmalloc.h>
1da177e4
LT		 18#include <sound/core.h>
19#include <sound/control.h>
20#include <sound/info.h>
21#include <sound/pcm.h>
22#include <sound/pcm_params.h>
23#include <sound/timer.h>
24#include <sound/minors.h>
e2e40f2c 25#include <linux/uio.h>
b888a5f7 26#include <linux/delay.h>
1da177e4 27
2c4842d3
TS		 28#include "pcm_local.h"
29
37567c55 30#ifdef CONFIG_SND_DEBUG
be4e31da
TS		 31#define CREATE_TRACE_POINTS
32#include "pcm_param_trace.h"
37567c55
TS		 33#else
34#define trace_hw_mask_param_enabled() 0
35#define trace_hw_interval_param_enabled() 0
36#define trace_hw_mask_param(substream, type, index, prev, curr)
37#define trace_hw_interval_param(substream, type, index, prev, curr)
38#endif
be4e31da 39
1da177e4
LT		 40/*
41 * Compatibility
42 */
43
877211f5 44struct snd_pcm_hw_params_old {
1da177e4
LT		 45 unsigned int flags;
46 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
47 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 48 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 49 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
50 unsigned int rmask;
51 unsigned int cmask;
52 unsigned int info;
53 unsigned int msbits;
54 unsigned int rate_num;
55 unsigned int rate_den;
877211f5 56 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 57 unsigned char reserved[64];
58};
59
59d48582 60#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 61#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
62#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 63
877211f5
TI		 64static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
66static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 68#endif
f87135f5 69static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 70
71/*
72 *
73 */
74
7af142f7 75static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4 76
73365cb1 77void snd_pcm_group_init(struct snd_pcm_group *group)
67ec1072 78{
73365cb1
TI		 79 spin_lock_init(&group->lock);
80 mutex_init(&group->mutex);
81 INIT_LIST_HEAD(&group->substreams);
0e279dce 82 refcount_set(&group->refs, 1);
67ec1072
TI		 83}
84
f57f3df0
TI		 85/* define group lock helpers */
86#define DEFINE_PCM_GROUP_LOCK(action, mutex_action) \
87static void snd_pcm_group_ ## action(struct snd_pcm_group *group, bool nonatomic) \
88{ \
89 if (nonatomic) \
90 mutex_ ## mutex_action(&group->mutex); \
91 else \
92 spin_ ## action(&group->lock); \
10aa7cad
AMG		 93}
94
f57f3df0
TI		 95DEFINE_PCM_GROUP_LOCK(lock, lock);
96DEFINE_PCM_GROUP_LOCK(unlock, unlock);
97DEFINE_PCM_GROUP_LOCK(lock_irq, lock);
98DEFINE_PCM_GROUP_LOCK(unlock_irq, unlock);
10aa7cad 99
30b771cf
TI		 100/**
101 * snd_pcm_stream_lock - Lock the PCM stream
102 * @substream: PCM substream
103 *
104 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
105 * flag of the given substream. This also takes the global link rw lock
106 * (or rw sem), too, for avoiding the race with linked streams.
107 */
7af142f7
TI		 108void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
109{
ef2056b8 110 snd_pcm_group_lock(&substream->self_group, substream->pcm->nonatomic);
7af142f7
TI		 111}
112EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
113
30b771cf 114/**
f7b6603c 115 * snd_pcm_stream_unlock - Unlock the PCM stream
30b771cf
TI		 116 * @substream: PCM substream
117 *
118 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
119 */
7af142f7
TI		 120void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
121{
ef2056b8 122 snd_pcm_group_unlock(&substream->self_group, substream->pcm->nonatomic);
7af142f7
TI		 123}
124EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
125
30b771cf
TI		 126/**
127 * snd_pcm_stream_lock_irq - Lock the PCM stream
128 * @substream: PCM substream
129 *
130 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
131 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
132 * as snd_pcm_stream_lock().
133 */
7af142f7
TI		 134void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
135{
ef2056b8
TI		 136 snd_pcm_group_lock_irq(&substream->self_group,
137 substream->pcm->nonatomic);
7af142f7
TI		 138}
139EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
140
e18035cf
MM		 141static void snd_pcm_stream_lock_nested(struct snd_pcm_substream *substream)
142{
143 struct snd_pcm_group *group = &substream->self_group;
144
145 if (substream->pcm->nonatomic)
146 mutex_lock_nested(&group->mutex, SINGLE_DEPTH_NESTING);
147 else
148 spin_lock_nested(&group->lock, SINGLE_DEPTH_NESTING);
149}
150
30b771cf
TI		 151/**
152 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
153 * @substream: PCM substream
154 *
155 * This is a counter-part of snd_pcm_stream_lock_irq().
156 */
7af142f7
TI		 157void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
158{
ef2056b8
TI		 159 snd_pcm_group_unlock_irq(&substream->self_group,
160 substream->pcm->nonatomic);
7af142f7
TI		 161}
162EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
163
164unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
165{
ef2056b8
TI		 166 unsigned long flags = 0;
167 if (substream->pcm->nonatomic)
168 mutex_lock(&substream->self_group.mutex);
169 else
170 spin_lock_irqsave(&substream->self_group.lock, flags);
171 return flags;
7af142f7
TI		 172}
173EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
174
30b771cf
TI		 175/**
176 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
177 * @substream: PCM substream
178 * @flags: irq flags
179 *
180 * This is a counter-part of snd_pcm_stream_lock_irqsave().
181 */
7af142f7
TI		 182void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
183 unsigned long flags)
184{
ef2056b8
TI		 185 if (substream->pcm->nonatomic)
186 mutex_unlock(&substream->self_group.mutex);
187 else
188 spin_unlock_irqrestore(&substream->self_group.lock, flags);
7af142f7
TI		 189}
190EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
1da177e4 191
fc033cbf
TI		 192/* Run PCM ioctl ops */
193static int snd_pcm_ops_ioctl(struct snd_pcm_substream *substream,
194 unsigned cmd, void *arg)
195{
196 if (substream->ops->ioctl)
197 return substream->ops->ioctl(substream, cmd, arg);
198 else
199 return snd_pcm_lib_ioctl(substream, cmd, arg);
200}
201
877211f5 202int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 203{
877211f5
TI		 204 struct snd_pcm *pcm = substream->pcm;
205 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 206
1da177e4
LT		 207 memset(info, 0, sizeof(*info));
208 info->card = pcm->card->number;
209 info->device = pcm->device;
210 info->stream = substream->stream;
211 info->subdevice = substream->number;
75b1a8f9
JP		 212 strscpy(info->id, pcm->id, sizeof(info->id));
213 strscpy(info->name, pcm->name, sizeof(info->name));
1da177e4
LT		 214 info->dev_class = pcm->dev_class;
215 info->dev_subclass = pcm->dev_subclass;
216 info->subdevices_count = pstr->substream_count;
217 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
75b1a8f9 218 strscpy(info->subname, substream->name, sizeof(info->subname));
e11f0f90 219
1da177e4
LT		 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
f9b0c053
TI		 241/* macro for simplified cast */
242#define PARAM_MASK_BIT(b) (1U << (__force int)(b))
243
63825f3a
TI		 244static bool hw_support_mmap(struct snd_pcm_substream *substream)
245{
cbea6e5a
TI		 246 struct snd_dma_buffer *dmabuf;
247
63825f3a
TI		 248 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
249 return false;
425da159 250
852a8a97 251 if (substream->ops->mmap || substream->ops->page)
425da159
CH		 252 return true;
253
cbea6e5a
TI		 254 dmabuf = snd_pcm_get_dma_buf(substream);
255 if (!dmabuf)
256 dmabuf = &substream->dma_buffer;
257 switch (dmabuf->dev.type) {
c4824ae7 258 case SNDRV_DMA_TYPE_UNKNOWN:
dc0dc8a7
TI		 259 /* we can't know the device, so just assume that the driver does
260 * everything right
261 */
262 return true;
c4824ae7
TI		 263 case SNDRV_DMA_TYPE_CONTINUOUS:
264 case SNDRV_DMA_TYPE_VMALLOC:
265 return true;
266 default:
cbea6e5a 267 return dma_can_mmap(dmabuf->dev.dev);
c4824ae7 268 }
63825f3a
TI		 269}
270
561e1cad
TS		 271static int constrain_mask_params(struct snd_pcm_substream *substream,
272 struct snd_pcm_hw_params *params)
1da177e4 273{
561e1cad
TS		 274 struct snd_pcm_hw_constraints *constrs =
275 &substream->runtime->hw_constraints;
276 struct snd_mask *m;
1da177e4 277 unsigned int k;
561e1cad
TS		 278 struct snd_mask old_mask;
279 int changed;
1da177e4
LT		 280
281 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
282 m = hw_param_mask(params, k);
283 if (snd_mask_empty(m))
284 return -EINVAL;
d81052f9
TS		 285
286 /* This parameter is not requested to change by a caller. */
f9b0c053 287 if (!(params->rmask & PARAM_MASK_BIT(k)))
1da177e4 288 continue;
561e1cad
TS		 289
290 if (trace_hw_mask_param_enabled())
291 old_mask = *m;
292
1da177e4 293 changed = snd_mask_refine(m, constrs_mask(constrs, k));
1da177e4
LT		 294 if (changed < 0)
295 return changed;
82e7d501
TS		 296 if (changed == 0)
297 continue;
561e1cad 298
d81052f9 299 /* Set corresponding flag so that the caller gets it. */
82e7d501 300 trace_hw_mask_param(substream, k, 0, &old_mask, m);
f9b0c053 301 params->cmask |= PARAM_MASK_BIT(k);
1da177e4
LT		 302 }
303
561e1cad
TS		 304 return 0;
305}
306
3432fa04
TS		 307static int constrain_interval_params(struct snd_pcm_substream *substream,
308 struct snd_pcm_hw_params *params)
309{
310 struct snd_pcm_hw_constraints *constrs =
311 &substream->runtime->hw_constraints;
312 struct snd_interval *i;
313 unsigned int k;
314 struct snd_interval old_interval;
315 int changed;
316
1da177e4
LT		 317 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
318 i = hw_param_interval(params, k);
319 if (snd_interval_empty(i))
320 return -EINVAL;
d81052f9
TS		 321
322 /* This parameter is not requested to change by a caller. */
f9b0c053 323 if (!(params->rmask & PARAM_MASK_BIT(k)))
1da177e4 324 continue;
3432fa04
TS		 325
326 if (trace_hw_interval_param_enabled())
327 old_interval = *i;
328
1da177e4 329 changed = snd_interval_refine(i, constrs_interval(constrs, k));
1da177e4
LT		 330 if (changed < 0)
331 return changed;
82e7d501
TS		 332 if (changed == 0)
333 continue;
3432fa04 334
d81052f9 335 /* Set corresponding flag so that the caller gets it. */
82e7d501 336 trace_hw_interval_param(substream, k, 0, &old_interval, i);
f9b0c053 337 params->cmask |= PARAM_MASK_BIT(k);
1da177e4
LT		 338 }
339
3432fa04
TS		 340 return 0;
341}
342
9cc07f55
TS		 343static int constrain_params_by_rules(struct snd_pcm_substream *substream,
344 struct snd_pcm_hw_params *params)
1da177e4 345{
9cc07f55
TS		 346 struct snd_pcm_hw_constraints *constrs =
347 &substream->runtime->hw_constraints;
1da177e4 348 unsigned int k;
5730f9f7 349 unsigned int *rstamps;
1da177e4 350 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
d81052f9 351 unsigned int stamp;
a1c06e39
TS		 352 struct snd_pcm_hw_rule *r;
353 unsigned int d;
9cc07f55
TS		 354 struct snd_mask old_mask;
355 struct snd_interval old_interval;
a1c06e39 356 bool again;
5730f9f7 357 int changed, err = 0;
1da177e4 358
d81052f9
TS		 359 /*
360 * Each application of rule has own sequence number.
361 *
362 * Each member of 'rstamps' array represents the sequence number of
363 * recent application of corresponding rule.
364 */
5730f9f7
TI		 365 rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL);
366 if (!rstamps)
367 return -ENOMEM;
d81052f9
TS		 368
369 /*
370 * Each member of 'vstamps' array represents the sequence number of
371 * recent application of rule in which corresponding parameters were
372 * changed.
373 *
374 * In initial state, elements corresponding to parameters requested by
375 * a caller is 1. For unrequested parameters, corresponding members
376 * have 0 so that the parameters are never changed anymore.
377 */
9cc07f55 378 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
f9b0c053 379 vstamps[k] = (params->rmask & PARAM_MASK_BIT(k)) ? 1 : 0;
d81052f9
TS		 380
381 /* Due to the above design, actual sequence number starts at 2. */
382 stamp = 2;
0d4e3999 383retry:
d81052f9 384 /* Apply all rules in order. */
a1c06e39 385 again = false;
0d4e3999 386 for (k = 0; k < constrs->rules_num; k++) {
a1c06e39 387 r = &constrs->rules[k];
d81052f9
TS		 388
389 /*
390 * Check condition bits of this rule. When the rule has
391 * some condition bits, parameter without the bits is
392 * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
393 * is an example of the condition bits.
394 */
0d4e3999
TS		 395 if (r->cond && !(r->cond & params->flags))
396 continue;
d81052f9
TS		 397
398 /*
23b53d44
TI		 399 * The 'deps' array includes maximum four dependencies
400 * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fifth
d81052f9
TS		 401 * member of this array is a sentinel and should be
402 * negative value.
403 *
404 * This rule should be processed in this time when dependent
405 * parameters were changed at former applications of the other
406 * rules.
407 */
0d4e3999 408 for (d = 0; r->deps[d] >= 0; d++) {
d656b4a6 409 if (vstamps[r->deps[d]] > rstamps[k])
0d4e3999 410 break;
0d4e3999 411 }
d656b4a6 412 if (r->deps[d] < 0)
0d4e3999 413 continue;
be4e31da 414
0d4e3999
TS		 415 if (trace_hw_mask_param_enabled()) {
416 if (hw_is_mask(r->var))
417 old_mask = *hw_param_mask(params, r->var);
418 }
419 if (trace_hw_interval_param_enabled()) {
420 if (hw_is_interval(r->var))
421 old_interval = *hw_param_interval(params, r->var);
422 }
c6706de0 423
0d4e3999 424 changed = r->func(params, r);
5730f9f7
TI		 425 if (changed < 0) {
426 err = changed;
427 goto out;
428 }
c6706de0 429
d81052f9 430 /*
82e7d501 431 * When the parameter is changed, notify it to the caller
d81052f9
TS		 432 * by corresponding returned bit, then preparing for next
433 * iteration.
434 */
0d4e3999 435 if (changed && r->var >= 0) {
82e7d501
TS		 436 if (hw_is_mask(r->var)) {
437 trace_hw_mask_param(substream, r->var,
438 k + 1, &old_mask,
439 hw_param_mask(params, r->var));
1da177e4 440 }
82e7d501
TS		 441 if (hw_is_interval(r->var)) {
442 trace_hw_interval_param(substream, r->var,
443 k + 1, &old_interval,
444 hw_param_interval(params, r->var));
1da177e4 445 }
82e7d501 446
f9b0c053 447 params->cmask |= PARAM_MASK_BIT(r->var);
0d4e3999 448 vstamps[r->var] = stamp;
a1c06e39 449 again = true;
1da177e4 450 }
f74ae15f 451
82e7d501 452 rstamps[k] = stamp++;
0d4e3999
TS		 453 }
454
d81052f9 455 /* Iterate to evaluate all rules till no parameters are changed. */
0d4e3999
TS		 456 if (again)
457 goto retry;
9cc07f55 458
5730f9f7
TI		 459 out:
460 kfree(rstamps);
461 return err;
9cc07f55
TS		 462}
463
f9a076bf
TS		 464static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
465 struct snd_pcm_hw_params *params)
466{
467 const struct snd_interval *i;
468 const struct snd_mask *m;
469 int err;
470
1da177e4 471 if (!params->msbits) {
f9a076bf 472 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
1da177e4
LT		 473 if (snd_interval_single(i))
474 params->msbits = snd_interval_value(i);
475 }
476
477 if (!params->rate_den) {
f9a076bf 478 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 479 if (snd_interval_single(i)) {
480 params->rate_num = snd_interval_value(i);
481 params->rate_den = 1;
482 }
483 }
484
f9a076bf
TS		 485 if (!params->fifo_size) {
486 m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
487 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
488 if (snd_mask_single(m) && snd_interval_single(i)) {
fc033cbf
TI		 489 err = snd_pcm_ops_ioctl(substream,
490 SNDRV_PCM_IOCTL1_FIFO_SIZE,
491 params);
f9a076bf
TS		 492 if (err < 0)
493 return err;
494 }
495 }
496
63825f3a 497 if (!params->info) {
7802fb52
TS		 498 params->info = substream->runtime->hw.info;
499 params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
500 SNDRV_PCM_INFO_DRAIN_TRIGGER);
63825f3a
TI		 501 if (!hw_support_mmap(substream))
502 params->info &= ~(SNDRV_PCM_INFO_MMAP |
503 SNDRV_PCM_INFO_MMAP_VALID);
504 }
7802fb52 505
f9a076bf
TS		 506 return 0;
507}
508
9cc07f55
TS		 509int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
510 struct snd_pcm_hw_params *params)
511{
9cc07f55
TS		 512 int err;
513
514 params->info = 0;
515 params->fifo_size = 0;
f9b0c053 516 if (params->rmask & PARAM_MASK_BIT(SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
9cc07f55 517 params->msbits = 0;
f9b0c053 518 if (params->rmask & PARAM_MASK_BIT(SNDRV_PCM_HW_PARAM_RATE)) {
9cc07f55
TS		 519 params->rate_num = 0;
520 params->rate_den = 0;
8bea869c 521 }
9cc07f55
TS		 522
523 err = constrain_mask_params(substream, params);
524 if (err < 0)
525 return err;
526
527 err = constrain_interval_params(substream, params);
528 if (err < 0)
529 return err;
530
531 err = constrain_params_by_rules(substream, params);
532 if (err < 0)
533 return err;
534
1da177e4 535 params->rmask = 0;
7802fb52 536
1da177e4
LT		 537 return 0;
538}
e88e8ae6
TI		 539EXPORT_SYMBOL(snd_pcm_hw_refine);
540
877211f5
TI		 541static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
542 struct snd_pcm_hw_params __user * _params)
1da177e4 543{
877211f5 544 struct snd_pcm_hw_params *params;
1da177e4
LT		 545 int err;
546
ef44a1ec
LZ		 547 params = memdup_user(_params, sizeof(*params));
548 if (IS_ERR(params))
549 return PTR_ERR(params);
550
1da177e4 551 err = snd_pcm_hw_refine(substream, params);
f74ae15f
TS		 552 if (err < 0)
553 goto end;
ef44a1ec 554
f74ae15f
TS		 555 err = fixup_unreferenced_params(substream, params);
556 if (err < 0)
557 goto end;
ef44a1ec 558
f74ae15f
TS		 559 if (copy_to_user(_params, params, sizeof(*params)))
560 err = -EFAULT;
561end:
1da177e4
LT		 562 kfree(params);
563 return err;
564}
565
9442e691
TI		 566static int period_to_usecs(struct snd_pcm_runtime *runtime)
567{
568 int usecs;
569
570 if (! runtime->rate)
571 return -1; /* invalid */
572
573 /* take 75% of period time as the deadline */
574 usecs = (750000 / runtime->rate) * runtime->period_size;
575 usecs += ((750000 % runtime->rate) * runtime->period_size) /
576 runtime->rate;
577
578 return usecs;
579}
580
cb639a42
TI		 581static void snd_pcm_set_state(struct snd_pcm_substream *substream,
582 snd_pcm_state_t state)
9b0573c0
TI		 583{
584 snd_pcm_stream_lock_irq(substream);
585 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
586 substream->runtime->status->state = state;
587 snd_pcm_stream_unlock_irq(substream);
588}
589
90bbaf66
JY		 590static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
591 int event)
592{
593#ifdef CONFIG_SND_PCM_TIMER
594 if (substream->timer)
595 snd_timer_notify(substream->timer, event,
596 &substream->runtime->trigger_tstamp);
597#endif
598}
599
29bb274e 600void snd_pcm_sync_stop(struct snd_pcm_substream *substream, bool sync_irq)
1e850bee 601{
29bb274e 602 if (substream->runtime && substream->runtime->stop_operating) {
1e850bee 603 substream->runtime->stop_operating = false;
29bb274e 604 if (substream->ops && substream->ops->sync_stop)
1e850bee 605 substream->ops->sync_stop(substream);
29bb274e 606 else if (sync_irq && substream->pcm->card->sync_irq > 0)
fabb26dc 607 synchronize_irq(substream->pcm->card->sync_irq);
1e850bee
TI		 608 }
609}
610
60f96aae 611/**
f7b6603c 612 * snd_pcm_hw_params_choose - choose a configuration defined by @params
60f96aae
TS		 613 * @pcm: PCM instance
614 * @params: the hw_params instance
615 *
616 * Choose one configuration from configuration space defined by @params.
617 * The configuration chosen is that obtained fixing in this order:
618 * first access, first format, first subformat, min channels,
619 * min rate, min period time, max buffer size, min tick time
620 *
621 * Return: Zero if successful, or a negative error code on failure.
622 */
623static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
624 struct snd_pcm_hw_params *params)
625{
626 static const int vars[] = {
627 SNDRV_PCM_HW_PARAM_ACCESS,
628 SNDRV_PCM_HW_PARAM_FORMAT,
629 SNDRV_PCM_HW_PARAM_SUBFORMAT,
630 SNDRV_PCM_HW_PARAM_CHANNELS,
631 SNDRV_PCM_HW_PARAM_RATE,
632 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
633 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
634 SNDRV_PCM_HW_PARAM_TICK_TIME,
635 -1
636 };
637 const int *v;
7b8a54af
TS		 638 struct snd_mask old_mask;
639 struct snd_interval old_interval;
82e7d501 640 int changed;
60f96aae
TS		 641
642 for (v = vars; *v != -1; v++) {
7b8a54af
TS		 643 /* Keep old parameter to trace. */
644 if (trace_hw_mask_param_enabled()) {
645 if (hw_is_mask(*v))
646 old_mask = *hw_param_mask(params, *v);
647 }
648 if (trace_hw_interval_param_enabled()) {
649 if (hw_is_interval(*v))
650 old_interval = *hw_param_interval(params, *v);
651 }
60f96aae 652 if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
82e7d501 653 changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
60f96aae 654 else
82e7d501 655 changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
e1a3a981 656 if (changed < 0)
82e7d501
TS		 657 return changed;
658 if (changed == 0)
659 continue;
7b8a54af 660
82e7d501 661 /* Trace the changed parameter. */
7b8a54af
TS		 662 if (hw_is_mask(*v)) {
663 trace_hw_mask_param(pcm, *v, 0, &old_mask,
664 hw_param_mask(params, *v));
665 }
666 if (hw_is_interval(*v)) {
667 trace_hw_interval_param(pcm, *v, 0, &old_interval,
668 hw_param_interval(params, *v));
669 }
60f96aae 670 }
7b8a54af 671
60f96aae
TS		 672 return 0;
673}
674
75d5ea11
TI		 675/* acquire buffer_mutex; if it's in r/w operation, return -EBUSY, otherwise
676 * block the further r/w operations
677 */
678static int snd_pcm_buffer_access_lock(struct snd_pcm_runtime *runtime)
679{
680 if (!atomic_dec_unless_positive(&runtime->buffer_accessing))
681 return -EBUSY;
682 mutex_lock(&runtime->buffer_mutex);
683 return 0; /* keep buffer_mutex, unlocked by below */
684}
685
686/* release buffer_mutex and clear r/w access flag */
687static void snd_pcm_buffer_access_unlock(struct snd_pcm_runtime *runtime)
688{
689 mutex_unlock(&runtime->buffer_mutex);
690 atomic_inc(&runtime->buffer_accessing);
691}
692
c1ce6064
TI		 693#if IS_ENABLED(CONFIG_SND_PCM_OSS)
694#define is_oss_stream(substream) ((substream)->oss.oss)
695#else
696#define is_oss_stream(substream) false
697#endif
698
877211f5
TI		 699static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
700 struct snd_pcm_hw_params *params)
1da177e4 701{
877211f5 702 struct snd_pcm_runtime *runtime;
75d5ea11 703 int err, usecs;
1da177e4
LT		 704 unsigned int bits;
705 snd_pcm_uframes_t frames;
706
7eaa943c
TI		 707 if (PCM_RUNTIME_CHECK(substream))
708 return -ENXIO;
1da177e4 709 runtime = substream->runtime;
75d5ea11
TI		 710 err = snd_pcm_buffer_access_lock(runtime);
711 if (err < 0)
712 return err;
1da177e4
LT		 713 snd_pcm_stream_lock_irq(substream);
714 switch (runtime->status->state) {
715 case SNDRV_PCM_STATE_OPEN:
716 case SNDRV_PCM_STATE_SETUP:
717 case SNDRV_PCM_STATE_PREPARED:
c1ce6064
TI		 718 if (!is_oss_stream(substream) &&
719 atomic_read(&substream->mmap_count))
720 err = -EBADFD;
1da177e4
LT		 721 break;
722 default:
c1ce6064
TI		 723 err = -EBADFD;
724 break;
1da177e4
LT		 725 }
726 snd_pcm_stream_unlock_irq(substream);
c1ce6064
TI		 727 if (err)
728 goto unlock;
1da177e4 729
29bb274e 730 snd_pcm_sync_stop(substream, true);
1e850bee 731
1da177e4
LT		 732 params->rmask = ~0U;
733 err = snd_pcm_hw_refine(substream, params);
734 if (err < 0)
735 goto _error;
736
737 err = snd_pcm_hw_params_choose(substream, params);
738 if (err < 0)
739 goto _error;
740
f9a076bf
TS		 741 err = fixup_unreferenced_params(substream, params);
742 if (err < 0)
743 goto _error;
744
0dba808e
TI		 745 if (substream->managed_buffer_alloc) {
746 err = snd_pcm_lib_malloc_pages(substream,
747 params_buffer_bytes(params));
748 if (err < 0)
749 goto _error;
750 runtime->buffer_changed = err > 0;
751 }
752
1da177e4
LT		 753 if (substream->ops->hw_params != NULL) {
754 err = substream->ops->hw_params(substream, params);
755 if (err < 0)
756 goto _error;
757 }
758
759 runtime->access = params_access(params);
760 runtime->format = params_format(params);
761 runtime->subformat = params_subformat(params);
762 runtime->channels = params_channels(params);
763 runtime->rate = params_rate(params);
764 runtime->period_size = params_period_size(params);
765 runtime->periods = params_periods(params);
766 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 767 runtime->info = params->info;
768 runtime->rate_num = params->rate_num;
769 runtime->rate_den = params->rate_den;
ab69a490
CL		 770 runtime->no_period_wakeup =
771 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
772 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 773
774 bits = snd_pcm_format_physical_width(runtime->format);
775 runtime->sample_bits = bits;
776 bits *= runtime->channels;
777 runtime->frame_bits = bits;
778 frames = 1;
779 while (bits % 8 != 0) {
780 bits *= 2;
781 frames *= 2;
782 }
783 runtime->byte_align = bits / 8;
784 runtime->min_align = frames;
785
786 /* Default sw params */
787 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
788 runtime->period_step = 1;
1da177e4 789 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 790 runtime->start_threshold = 1;
791 runtime->stop_threshold = runtime->buffer_size;
792 runtime->silence_threshold = 0;
793 runtime->silence_size = 0;
ead4046b
CL		 794 runtime->boundary = runtime->buffer_size;
795 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
796 runtime->boundary *= 2;
1da177e4 797
add9d56d 798 /* clear the buffer for avoiding possible kernel info leaks */
618de0f4
TI		 799 if (runtime->dma_area && !substream->ops->copy_user) {
800 size_t size = runtime->dma_bytes;
801
802 if (runtime->info & SNDRV_PCM_INFO_MMAP)
803 size = PAGE_ALIGN(size);
804 memset(runtime->dma_area, 0, size);
805 }
add9d56d 806
1da177e4 807 snd_pcm_timer_resolution_change(substream);
9b0573c0 808 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
9442e691 809
5371a79b
RW		 810 if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req))
811 cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
137c171c
TI		 812 usecs = period_to_usecs(runtime);
813 if (usecs >= 0)
5371a79b
RW		 814 cpu_latency_qos_add_request(&substream->latency_pm_qos_req,
815 usecs);
c1ce6064 816 err = 0;
1da177e4 817 _error:
c1ce6064
TI		 818 if (err) {
819 /* hardware might be unusable from this time,
820 * so we force application to retry to set
821 * the correct hardware parameter settings
822 */
823 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
824 if (substream->ops->hw_free != NULL)
825 substream->ops->hw_free(substream);
826 if (substream->managed_buffer_alloc)
827 snd_pcm_lib_free_pages(substream);
828 }
829 unlock:
75d5ea11 830 snd_pcm_buffer_access_unlock(runtime);
1da177e4
LT		 831 return err;
832}
833
877211f5
TI		 834static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
835 struct snd_pcm_hw_params __user * _params)
1da177e4 836{
877211f5 837 struct snd_pcm_hw_params *params;
1da177e4
LT		 838 int err;
839
ef44a1ec
LZ		 840 params = memdup_user(_params, sizeof(*params));
841 if (IS_ERR(params))
842 return PTR_ERR(params);
843
1da177e4 844 err = snd_pcm_hw_params(substream, params);
f74ae15f
TS		 845 if (err < 0)
846 goto end;
ef44a1ec 847
f74ae15f
TS		 848 if (copy_to_user(_params, params, sizeof(*params)))
849 err = -EFAULT;
850end:
1da177e4
LT		 851 kfree(params);
852 return err;
853}
854
66f2d19f
TI		 855static int do_hw_free(struct snd_pcm_substream *substream)
856{
857 int result = 0;
858
29bb274e 859 snd_pcm_sync_stop(substream, true);
66f2d19f
TI		 860 if (substream->ops->hw_free)
861 result = substream->ops->hw_free(substream);
862 if (substream->managed_buffer_alloc)
863 snd_pcm_lib_free_pages(substream);
864 return result;
865}
866
877211f5 867static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 868{
877211f5 869 struct snd_pcm_runtime *runtime;
c1ce6064 870 int result = 0;
1da177e4 871
7eaa943c
TI		 872 if (PCM_RUNTIME_CHECK(substream))
873 return -ENXIO;
1da177e4 874 runtime = substream->runtime;
75d5ea11
TI		 875 result = snd_pcm_buffer_access_lock(runtime);
876 if (result < 0)
877 return result;
1da177e4
LT		 878 snd_pcm_stream_lock_irq(substream);
879 switch (runtime->status->state) {
880 case SNDRV_PCM_STATE_SETUP:
881 case SNDRV_PCM_STATE_PREPARED:
c1ce6064
TI		 882 if (atomic_read(&substream->mmap_count))
883 result = -EBADFD;
1da177e4
LT		 884 break;
885 default:
c1ce6064
TI		 886 result = -EBADFD;
887 break;
1da177e4
LT		 888 }
889 snd_pcm_stream_unlock_irq(substream);
c1ce6064
TI		 890 if (result)
891 goto unlock;
66f2d19f 892 result = do_hw_free(substream);
9b0573c0 893 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
5371a79b 894 cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
c1ce6064 895 unlock:
75d5ea11 896 snd_pcm_buffer_access_unlock(runtime);
1da177e4
LT		 897 return result;
898}
899
877211f5
TI		 900static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
901 struct snd_pcm_sw_params *params)
1da177e4 902{
877211f5 903 struct snd_pcm_runtime *runtime;
1250932e 904 int err;
1da177e4 905
7eaa943c
TI		 906 if (PCM_RUNTIME_CHECK(substream))
907 return -ENXIO;
1da177e4 908 runtime = substream->runtime;
1da177e4
LT		 909 snd_pcm_stream_lock_irq(substream);
910 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
911 snd_pcm_stream_unlock_irq(substream);
912 return -EBADFD;
913 }
914 snd_pcm_stream_unlock_irq(substream);
915
145d92e7
DC		 916 if (params->tstamp_mode < 0 ||
917 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
1da177e4 918 return -EINVAL;
58900810
TI		 919 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
920 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
5646eda5 921 return -EINVAL;
1da177e4
LT		 922 if (params->avail_min == 0)
923 return -EINVAL;
1da177e4
LT		 924 if (params->silence_size >= runtime->boundary) {
925 if (params->silence_threshold != 0)
926 return -EINVAL;
927 } else {
928 if (params->silence_size > params->silence_threshold)
929 return -EINVAL;
930 if (params->silence_threshold > runtime->buffer_size)
931 return -EINVAL;
932 }
1250932e 933 err = 0;
1da177e4
LT		 934 snd_pcm_stream_lock_irq(substream);
935 runtime->tstamp_mode = params->tstamp_mode;
58900810
TI		 936 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
937 runtime->tstamp_type = params->tstamp_type;
1da177e4
LT		 938 runtime->period_step = params->period_step;
939 runtime->control->avail_min = params->avail_min;
940 runtime->start_threshold = params->start_threshold;
941 runtime->stop_threshold = params->stop_threshold;
942 runtime->silence_threshold = params->silence_threshold;
943 runtime->silence_size = params->silence_size;
1da177e4
LT		 944 params->boundary = runtime->boundary;
945 if (snd_pcm_running(substream)) {
1da177e4
LT		 946 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
947 runtime->silence_size > 0)
948 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 949 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 950 }
951 snd_pcm_stream_unlock_irq(substream);
1250932e 952 return err;
1da177e4
LT		 953}
954
877211f5
TI		 955static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
956 struct snd_pcm_sw_params __user * _params)
1da177e4 957{
877211f5 958 struct snd_pcm_sw_params params;
1da177e4
LT		 959 int err;
960 if (copy_from_user(&params, _params, sizeof(params)))
961 return -EFAULT;
962 err = snd_pcm_sw_params(substream, &params);
963 if (copy_to_user(_params, &params, sizeof(params)))
964 return -EFAULT;
965 return err;
966}
967
c99c5a3b
TI		 968static inline snd_pcm_uframes_t
969snd_pcm_calc_delay(struct snd_pcm_substream *substream)
970{
971 snd_pcm_uframes_t delay;
972
973 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
974 delay = snd_pcm_playback_hw_avail(substream->runtime);
975 else
976 delay = snd_pcm_capture_avail(substream->runtime);
977 return delay + substream->runtime->delay;
978}
979
3ddee7f8
BW		 980int snd_pcm_status64(struct snd_pcm_substream *substream,
981 struct snd_pcm_status64 *status)
1da177e4 982{
877211f5 983 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 984
985 snd_pcm_stream_lock_irq(substream);
3179f620
PLB		 986
987 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
988 &runtime->audio_tstamp_config);
989
990 /* backwards compatible behavior */
991 if (runtime->audio_tstamp_config.type_requested ==
992 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
993 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
994 runtime->audio_tstamp_config.type_requested =
995 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
996 else
997 runtime->audio_tstamp_config.type_requested =
998 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
999 runtime->audio_tstamp_report.valid = 0;
1000 } else
1001 runtime->audio_tstamp_report.valid = 1;
1002
1da177e4
LT		 1003 status->state = runtime->status->state;
1004 status->suspended_state = runtime->status->suspended_state;
1005 if (status->state == SNDRV_PCM_STATE_OPEN)
1006 goto _end;
3ddee7f8
BW		 1007 status->trigger_tstamp_sec = runtime->trigger_tstamp.tv_sec;
1008 status->trigger_tstamp_nsec = runtime->trigger_tstamp.tv_nsec;
8c121586 1009 if (snd_pcm_running(substream)) {
1da177e4 1010 snd_pcm_update_hw_ptr(substream);
8c121586 1011 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
3ddee7f8
BW		 1012 status->tstamp_sec = runtime->status->tstamp.tv_sec;
1013 status->tstamp_nsec =
1014 runtime->status->tstamp.tv_nsec;
1015 status->driver_tstamp_sec =
1016 runtime->driver_tstamp.tv_sec;
1017 status->driver_tstamp_nsec =
1018 runtime->driver_tstamp.tv_nsec;
1019 status->audio_tstamp_sec =
1020 runtime->status->audio_tstamp.tv_sec;
1021 status->audio_tstamp_nsec =
1022 runtime->status->audio_tstamp.tv_nsec;
3179f620
PLB		 1023 if (runtime->audio_tstamp_report.valid == 1)
1024 /* backwards compatibility, no report provided in COMPAT mode */
1025 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
1026 &status->audio_tstamp_accuracy,
1027 &runtime->audio_tstamp_report);
1028
8c121586
JK		 1029 goto _tstamp_end;
1030 }
0d59b814
PLB		 1031 } else {
1032 /* get tstamp only in fallback mode and only if enabled */
fcae40c9
BW		 1033 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
1034 struct timespec64 tstamp;
1035
1036 snd_pcm_gettime(runtime, &tstamp);
3ddee7f8
BW		 1037 status->tstamp_sec = tstamp.tv_sec;
1038 status->tstamp_nsec = tstamp.tv_nsec;
fcae40c9 1039 }
8c121586 1040 }
8c121586 1041 _tstamp_end:
1da177e4
LT		 1042 status->appl_ptr = runtime->control->appl_ptr;
1043 status->hw_ptr = runtime->status->hw_ptr;
763e5067 1044 status->avail = snd_pcm_avail(substream);
c99c5a3b
TI		 1045 status->delay = snd_pcm_running(substream) ?
1046 snd_pcm_calc_delay(substream) : 0;
1da177e4
LT		 1047 status->avail_max = runtime->avail_max;
1048 status->overrange = runtime->overrange;
1049 runtime->avail_max = 0;
1050 runtime->overrange = 0;
1051 _end:
1052 snd_pcm_stream_unlock_irq(substream);
1053 return 0;
1054}
1055
3ddee7f8
BW		 1056static int snd_pcm_status_user64(struct snd_pcm_substream *substream,
1057 struct snd_pcm_status64 __user * _status,
1058 bool ext)
1da177e4 1059{
3ddee7f8 1060 struct snd_pcm_status64 status;
1da177e4 1061 int res;
38ca2a4d 1062
1da177e4 1063 memset(&status, 0, sizeof(status));
38ca2a4d
PLB		 1064 /*
1065 * with extension, parameters are read/write,
1066 * get audio_tstamp_data from user,
1067 * ignore rest of status structure
1068 */
1069 if (ext && get_user(status.audio_tstamp_data,
1070 (u32 __user *)(&_status->audio_tstamp_data)))
1071 return -EFAULT;
3ddee7f8 1072 res = snd_pcm_status64(substream, &status);
1da177e4
LT		 1073 if (res < 0)
1074 return res;
1075 if (copy_to_user(_status, &status, sizeof(status)))
1076 return -EFAULT;
1077 return 0;
1078}
1079
3ddee7f8
BW		 1080static int snd_pcm_status_user32(struct snd_pcm_substream *substream,
1081 struct snd_pcm_status32 __user * _status,
1082 bool ext)
1083{
1084 struct snd_pcm_status64 status64;
1085 struct snd_pcm_status32 status32;
1086 int res;
1087
1088 memset(&status64, 0, sizeof(status64));
1089 memset(&status32, 0, sizeof(status32));
1090 /*
1091 * with extension, parameters are read/write,
1092 * get audio_tstamp_data from user,
1093 * ignore rest of status structure
1094 */
1095 if (ext && get_user(status64.audio_tstamp_data,
1096 (u32 __user *)(&_status->audio_tstamp_data)))
1097 return -EFAULT;
1098 res = snd_pcm_status64(substream, &status64);
1099 if (res < 0)
1100 return res;
1101
1102 status32 = (struct snd_pcm_status32) {
1103 .state = status64.state,
1104 .trigger_tstamp_sec = status64.trigger_tstamp_sec,
1105 .trigger_tstamp_nsec = status64.trigger_tstamp_nsec,
1106 .tstamp_sec = status64.tstamp_sec,
1107 .tstamp_nsec = status64.tstamp_nsec,
1108 .appl_ptr = status64.appl_ptr,
1109 .hw_ptr = status64.hw_ptr,
1110 .delay = status64.delay,
1111 .avail = status64.avail,
1112 .avail_max = status64.avail_max,
1113 .overrange = status64.overrange,
1114 .suspended_state = status64.suspended_state,
1115 .audio_tstamp_data = status64.audio_tstamp_data,
1116 .audio_tstamp_sec = status64.audio_tstamp_sec,
1117 .audio_tstamp_nsec = status64.audio_tstamp_nsec,
1118 .driver_tstamp_sec = status64.audio_tstamp_sec,
1119 .driver_tstamp_nsec = status64.audio_tstamp_nsec,
1120 .audio_tstamp_accuracy = status64.audio_tstamp_accuracy,
1121 };
1122
1123 if (copy_to_user(_status, &status32, sizeof(status32)))
1124 return -EFAULT;
1125
1126 return 0;
1127}
1128
877211f5
TI		 1129static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
1130 struct snd_pcm_channel_info * info)
1da177e4 1131{
877211f5 1132 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1133 unsigned int channel;
1134
1da177e4
LT		 1135 channel = info->channel;
1136 runtime = substream->runtime;
1137 snd_pcm_stream_lock_irq(substream);
1138 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
1139 snd_pcm_stream_unlock_irq(substream);
1140 return -EBADFD;
1141 }
1142 snd_pcm_stream_unlock_irq(substream);
1143 if (channel >= runtime->channels)
1144 return -EINVAL;
1145 memset(info, 0, sizeof(*info));
1146 info->channel = channel;
fc033cbf 1147 return snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
1da177e4
LT		 1148}
1149
877211f5
TI		 1150static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
1151 struct snd_pcm_channel_info __user * _info)
1da177e4 1152{
877211f5 1153 struct snd_pcm_channel_info info;
1da177e4
LT		 1154 int res;
1155
1156 if (copy_from_user(&info, _info, sizeof(info)))
1157 return -EFAULT;
1158 res = snd_pcm_channel_info(substream, &info);
1159 if (res < 0)
1160 return res;
1161 if (copy_to_user(_info, &info, sizeof(info)))
1162 return -EFAULT;
1163 return 0;
1164}
1165
877211f5 1166static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 1167{
877211f5 1168 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1169 if (runtime->trigger_master == NULL)
1170 return;
1171 if (runtime->trigger_master == substream) {
2b79d7a6
PLB		 1172 if (!runtime->trigger_tstamp_latched)
1173 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 1174 } else {
1175 snd_pcm_trigger_tstamp(runtime->trigger_master);
1176 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
1177 }
1178 runtime->trigger_master = NULL;
1179}
1180
cb639a42
TI		 1181#define ACTION_ARG_IGNORE (__force snd_pcm_state_t)0
1182
1da177e4 1183struct action_ops {
cb639a42
TI		 1184 int (*pre_action)(struct snd_pcm_substream *substream,
1185 snd_pcm_state_t state);
1186 int (*do_action)(struct snd_pcm_substream *substream,
1187 snd_pcm_state_t state);
1188 void (*undo_action)(struct snd_pcm_substream *substream,
1189 snd_pcm_state_t state);
1190 void (*post_action)(struct snd_pcm_substream *substream,
1191 snd_pcm_state_t state);
1da177e4
LT		 1192};
1193
1194/*
1195 * this functions is core for handling of linked stream
1196 * Note: the stream state might be changed also on failure
1197 * Note2: call with calling stream lock + link lock
1198 */
b17154cf 1199static int snd_pcm_action_group(const struct action_ops *ops,
877211f5 1200 struct snd_pcm_substream *substream,
cb639a42 1201 snd_pcm_state_t state,
a991850a 1202 bool stream_lock)
1da177e4 1203{
877211f5
TI		 1204 struct snd_pcm_substream *s = NULL;
1205 struct snd_pcm_substream *s1;
dde1c652 1206 int res = 0, depth = 1;
1da177e4 1207
ef991b95 1208 snd_pcm_group_for_each_entry(s, substream) {
a991850a
TI		 1209 if (s != substream) {
1210 if (!stream_lock)
1211 mutex_lock_nested(&s->runtime->buffer_mutex, depth);
1212 else if (s->pcm->nonatomic)
dde1c652 1213 mutex_lock_nested(&s->self_group.mutex, depth);
257f8cce 1214 else
dde1c652
TI		 1215 spin_lock_nested(&s->self_group.lock, depth);
1216 depth++;
257f8cce 1217 }
1da177e4
LT		 1218 res = ops->pre_action(s, state);
1219 if (res < 0)
1220 goto _unlock;
1221 }
ef991b95 1222 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 1223 res = ops->do_action(s, state);
1224 if (res < 0) {
1225 if (ops->undo_action) {
ef991b95 1226 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 1227 if (s1 == s) /* failed stream */
1228 break;
1229 ops->undo_action(s1, state);
1230 }
1231 }
1232 s = NULL; /* unlock all */
1233 goto _unlock;
1234 }
1235 }
ef991b95 1236 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 1237 ops->post_action(s, state);
1238 }
1239 _unlock:
a991850a
TI		 1240 /* unlock streams */
1241 snd_pcm_group_for_each_entry(s1, substream) {
1242 if (s1 != substream) {
1243 if (!stream_lock)
1244 mutex_unlock(&s1->runtime->buffer_mutex);
1245 else if (s1->pcm->nonatomic)
1246 mutex_unlock(&s1->self_group.mutex);
1247 else
1248 spin_unlock(&s1->self_group.lock);
1da177e4 1249 }
a991850a
TI		 1250 if (s1 == s) /* end */
1251 break;
1da177e4
LT		 1252 }
1253 return res;
1254}
1255
1256/*
1257 * Note: call with stream lock
1258 */
b17154cf 1259static int snd_pcm_action_single(const struct action_ops *ops,
877211f5 1260 struct snd_pcm_substream *substream,
cb639a42 1261 snd_pcm_state_t state)
1da177e4
LT		 1262{
1263 int res;
1264
1265 res = ops->pre_action(substream, state);
1266 if (res < 0)
1267 return res;
1268 res = ops->do_action(substream, state);
1269 if (res == 0)
1270 ops->post_action(substream, state);
1271 else if (ops->undo_action)
1272 ops->undo_action(substream, state);
1273 return res;
1274}
1275
a41c4cb9
TI		 1276static void snd_pcm_group_assign(struct snd_pcm_substream *substream,
1277 struct snd_pcm_group *new_group)
1278{
1279 substream->group = new_group;
1280 list_move(&substream->link_list, &new_group->substreams);
1281}
1282
f57f3df0
TI		 1283/*
1284 * Unref and unlock the group, but keep the stream lock;
1285 * when the group becomes empty and no longer referred, destroy itself
1286 */
1287static void snd_pcm_group_unref(struct snd_pcm_group *group,
1288 struct snd_pcm_substream *substream)
1289{
1290 bool do_free;
1291
1292 if (!group)
1293 return;
0e279dce 1294 do_free = refcount_dec_and_test(&group->refs);
f57f3df0
TI		 1295 snd_pcm_group_unlock(group, substream->pcm->nonatomic);
1296 if (do_free)
1297 kfree(group);
1298}
1299
1300/*
1301 * Lock the group inside a stream lock and reference it;
1302 * return the locked group object, or NULL if not linked
1303 */
1304static struct snd_pcm_group *
1305snd_pcm_stream_group_ref(struct snd_pcm_substream *substream)
1306{
1307 bool nonatomic = substream->pcm->nonatomic;
1308 struct snd_pcm_group *group;
1309 bool trylock;
1310
1311 for (;;) {
1312 if (!snd_pcm_stream_linked(substream))
1313 return NULL;
1314 group = substream->group;
1315 /* block freeing the group object */
1316 refcount_inc(&group->refs);
1317
1318 trylock = nonatomic ? mutex_trylock(&group->mutex) :
1319 spin_trylock(&group->lock);
1320 if (trylock)
1321 break; /* OK */
1322
1323 /* re-lock for avoiding ABBA deadlock */
1324 snd_pcm_stream_unlock(substream);
1325 snd_pcm_group_lock(group, nonatomic);
1326 snd_pcm_stream_lock(substream);
1327
1328 /* check the group again; the above opens a small race window */
1329 if (substream->group == group)
1330 break; /* OK */
1331 /* group changed, try again */
1332 snd_pcm_group_unref(group, substream);
1333 }
1334 return group;
1335}
1336
aa8edd8c
TI		 1337/*
1338 * Note: call with stream lock
1339 */
b17154cf 1340static int snd_pcm_action(const struct action_ops *ops,
aa8edd8c 1341 struct snd_pcm_substream *substream,
cb639a42 1342 snd_pcm_state_t state)
257f8cce 1343{
f57f3df0 1344 struct snd_pcm_group *group;
257f8cce
TI		 1345 int res;
1346
f57f3df0
TI		 1347 group = snd_pcm_stream_group_ref(substream);
1348 if (group)
cb639a42 1349 res = snd_pcm_action_group(ops, substream, state, true);
f57f3df0
TI		 1350 else
1351 res = snd_pcm_action_single(ops, substream, state);
1352 snd_pcm_group_unref(group, substream);
1da177e4
LT		 1353 return res;
1354}
1355
1356/*
1357 * Note: don't use any locks before
1358 */
b17154cf 1359static int snd_pcm_action_lock_irq(const struct action_ops *ops,
877211f5 1360 struct snd_pcm_substream *substream,
cb639a42 1361 snd_pcm_state_t state)
1da177e4
LT		 1362{
1363 int res;
1364
e3a4bd5e
TI		 1365 snd_pcm_stream_lock_irq(substream);
1366 res = snd_pcm_action(ops, substream, state);
1367 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1368 return res;
1369}
1370
1371/*
1372 */
b17154cf 1373static int snd_pcm_action_nonatomic(const struct action_ops *ops,
877211f5 1374 struct snd_pcm_substream *substream,
cb639a42 1375 snd_pcm_state_t state)
1da177e4
LT		 1376{
1377 int res;
1378
f57f3df0 1379 /* Guarantee the group members won't change during non-atomic action */
1da177e4 1380 down_read(&snd_pcm_link_rwsem);
75d5ea11
TI		 1381 res = snd_pcm_buffer_access_lock(substream->runtime);
1382 if (res < 0)
1383 goto unlock;
1da177e4 1384 if (snd_pcm_stream_linked(substream))
cb639a42 1385 res = snd_pcm_action_group(ops, substream, state, false);
1da177e4
LT		 1386 else
1387 res = snd_pcm_action_single(ops, substream, state);
75d5ea11
TI		 1388 snd_pcm_buffer_access_unlock(substream->runtime);
1389 unlock:
1da177e4
LT		 1390 up_read(&snd_pcm_link_rwsem);
1391 return res;
1392}
1393
1394/*
1395 * start callbacks
1396 */
cb639a42
TI		 1397static int snd_pcm_pre_start(struct snd_pcm_substream *substream,
1398 snd_pcm_state_t state)
1da177e4 1399{
877211f5 1400 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1401 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1402 return -EBADFD;
1403 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1404 !snd_pcm_playback_data(substream))
1405 return -EPIPE;
2b79d7a6 1406 runtime->trigger_tstamp_latched = false;
1da177e4
LT		 1407 runtime->trigger_master = substream;
1408 return 0;
1409}
1410
cb639a42
TI		 1411static int snd_pcm_do_start(struct snd_pcm_substream *substream,
1412 snd_pcm_state_t state)
1da177e4
LT		 1413{
1414 if (substream->runtime->trigger_master != substream)
1415 return 0;
1416 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1417}
1418
cb639a42
TI		 1419static void snd_pcm_undo_start(struct snd_pcm_substream *substream,
1420 snd_pcm_state_t state)
1da177e4
LT		 1421{
1422 if (substream->runtime->trigger_master == substream)
1423 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1424}
1425
cb639a42
TI		 1426static void snd_pcm_post_start(struct snd_pcm_substream *substream,
1427 snd_pcm_state_t state)
1da177e4 1428{
877211f5 1429 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1430 snd_pcm_trigger_tstamp(substream);
6af3fb72 1431 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 1432 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1433 runtime->rate;
1da177e4
LT		 1434 runtime->status->state = state;
1435 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1436 runtime->silence_size > 0)
1437 snd_pcm_playback_silence(substream, ULONG_MAX);
90bbaf66 1438 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
1da177e4
LT		 1439}
1440
b17154cf 1441static const struct action_ops snd_pcm_action_start = {
1da177e4
LT		 1442 .pre_action = snd_pcm_pre_start,
1443 .do_action = snd_pcm_do_start,
1444 .undo_action = snd_pcm_undo_start,
1445 .post_action = snd_pcm_post_start
1446};
1447
1448/**
1c85cc64 1449 * snd_pcm_start - start all linked streams
df8db936 1450 * @substream: the PCM substream instance
eb7c06e8
YB		 1451 *
1452 * Return: Zero if successful, or a negative error code.
c2c86a97 1453 * The stream lock must be acquired before calling this function.
1da177e4 1454 */
877211f5 1455int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 1456{
877211f5
TI		 1457 return snd_pcm_action(&snd_pcm_action_start, substream,
1458 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 1459}
1460
c2c86a97
TI		 1461/* take the stream lock and start the streams */
1462static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
1463{
1464 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
1465 SNDRV_PCM_STATE_RUNNING);
1466}
1467
1da177e4
LT		 1468/*
1469 * stop callbacks
1470 */
cb639a42
TI		 1471static int snd_pcm_pre_stop(struct snd_pcm_substream *substream,
1472 snd_pcm_state_t state)
1da177e4 1473{
877211f5 1474 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1475 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1476 return -EBADFD;
1477 runtime->trigger_master = substream;
1478 return 0;
1479}
1480
cb639a42
TI		 1481static int snd_pcm_do_stop(struct snd_pcm_substream *substream,
1482 snd_pcm_state_t state)
1da177e4
LT		 1483{
1484 if (substream->runtime->trigger_master == substream &&
700cb707 1485 snd_pcm_running(substream)) {
1da177e4 1486 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
700cb707
TI		 1487 substream->runtime->stop_operating = true;
1488 }
583770e8 1489 return 0; /* unconditionally stop all substreams */
1da177e4
LT		 1490}
1491
cb639a42
TI		 1492static void snd_pcm_post_stop(struct snd_pcm_substream *substream,
1493 snd_pcm_state_t state)
1da177e4 1494{
877211f5 1495 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1496 if (runtime->status->state != state) {
1497 snd_pcm_trigger_tstamp(substream);
9bc889b4 1498 runtime->status->state = state;
90bbaf66 1499 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
1da177e4
LT		 1500 }
1501 wake_up(&runtime->sleep);
c91a988d 1502 wake_up(&runtime->tsleep);
1da177e4
LT		 1503}
1504
b17154cf 1505static const struct action_ops snd_pcm_action_stop = {
1da177e4
LT		 1506 .pre_action = snd_pcm_pre_stop,
1507 .do_action = snd_pcm_do_stop,
1508 .post_action = snd_pcm_post_stop
1509};
1510
1511/**
1c85cc64 1512 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 1513 * @substream: the PCM substream instance
1514 * @state: PCM state after stopping the stream
1da177e4 1515 *
1c85cc64 1516 * The state of each stream is then changed to the given state unconditionally.
eb7c06e8 1517 *
0a11458c 1518 * Return: Zero if successful, or a negative error code.
1da177e4 1519 */
fea952e5 1520int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 1521{
1522 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1523}
e88e8ae6
TI		 1524EXPORT_SYMBOL(snd_pcm_stop);
1525
1da177e4 1526/**
1c85cc64 1527 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 1528 * @substream: the PCM substream
1da177e4 1529 *
1c85cc64 1530 * After stopping, the state is changed to SETUP.
1da177e4 1531 * Unlike snd_pcm_stop(), this affects only the given stream.
eb7c06e8 1532 *
583770e8 1533 * Return: Zero if successful, or a negative error code.
1da177e4 1534 */
877211f5 1535int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 1536{
877211f5
TI		 1537 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1538 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 1539}
1540
1fb8510c
TI		 1541/**
1542 * snd_pcm_stop_xrun - stop the running streams as XRUN
1543 * @substream: the PCM substream instance
1fb8510c
TI		 1544 *
1545 * This stops the given running substream (and all linked substreams) as XRUN.
1546 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1547 *
1548 * Return: Zero if successful, or a negative error code.
1549 */
1550int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1551{
1552 unsigned long flags;
1fb8510c
TI		 1553
1554 snd_pcm_stream_lock_irqsave(substream, flags);
e647f5a5 1555 if (substream->runtime && snd_pcm_running(substream))
9cd641ed 1556 __snd_pcm_xrun(substream);
1fb8510c 1557 snd_pcm_stream_unlock_irqrestore(substream, flags);
9cd641ed 1558 return 0;
1fb8510c
TI		 1559}
1560EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1561
1da177e4 1562/*
cb639a42 1563 * pause callbacks: pass boolean (to start pause or resume) as state argument
1da177e4 1564 */
cb639a42
TI		 1565#define pause_pushed(state) (__force bool)(state)
1566
1567static int snd_pcm_pre_pause(struct snd_pcm_substream *substream,
1568 snd_pcm_state_t state)
1da177e4 1569{
877211f5 1570 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1571 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1572 return -ENOSYS;
cb639a42 1573 if (pause_pushed(state)) {
1da177e4
LT		 1574 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1575 return -EBADFD;
1576 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1577 return -EBADFD;
1578 runtime->trigger_master = substream;
1579 return 0;
1580}
1581
cb639a42
TI		 1582static int snd_pcm_do_pause(struct snd_pcm_substream *substream,
1583 snd_pcm_state_t state)
1da177e4
LT		 1584{
1585 if (substream->runtime->trigger_master != substream)
1586 return 0;
56385a12
JK		 1587 /* some drivers might use hw_ptr to recover from the pause -
1588 update the hw_ptr now */
cb639a42 1589 if (pause_pushed(state))
56385a12 1590 snd_pcm_update_hw_ptr(substream);
6af3fb72 1591 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 1592 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1593 * delta, effectively to skip the check once.
1594 */
1595 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4 1596 return substream->ops->trigger(substream,
cb639a42
TI		 1597 pause_pushed(state) ?
1598 SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1599 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1da177e4
LT		 1600}
1601
cb639a42
TI		 1602static void snd_pcm_undo_pause(struct snd_pcm_substream *substream,
1603 snd_pcm_state_t state)
1da177e4
LT		 1604{
1605 if (substream->runtime->trigger_master == substream)
1606 substream->ops->trigger(substream,
cb639a42
TI		 1607 pause_pushed(state) ?
1608 SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1da177e4
LT		 1609 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1610}
1611
cb639a42
TI		 1612static void snd_pcm_post_pause(struct snd_pcm_substream *substream,
1613 snd_pcm_state_t state)
1da177e4 1614{
877211f5 1615 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1616 snd_pcm_trigger_tstamp(substream);
cb639a42 1617 if (pause_pushed(state)) {
1da177e4 1618 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
90bbaf66 1619 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
1da177e4 1620 wake_up(&runtime->sleep);
c91a988d 1621 wake_up(&runtime->tsleep);
1da177e4
LT		 1622 } else {
1623 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
90bbaf66 1624 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
1da177e4
LT		 1625 }
1626}
1627
b17154cf 1628static const struct action_ops snd_pcm_action_pause = {
1da177e4
LT		 1629 .pre_action = snd_pcm_pre_pause,
1630 .do_action = snd_pcm_do_pause,
1631 .undo_action = snd_pcm_undo_pause,
1632 .post_action = snd_pcm_post_pause
1633};
1634
1635/*
1636 * Push/release the pause for all linked streams.
1637 */
cb639a42 1638static int snd_pcm_pause(struct snd_pcm_substream *substream, bool push)
1da177e4 1639{
cb639a42
TI		 1640 return snd_pcm_action(&snd_pcm_action_pause, substream,
1641 (__force snd_pcm_state_t)push);
1642}
1643
1644static int snd_pcm_pause_lock_irq(struct snd_pcm_substream *substream,
1645 bool push)
1646{
1647 return snd_pcm_action_lock_irq(&snd_pcm_action_pause, substream,
1648 (__force snd_pcm_state_t)push);
1da177e4
LT		 1649}
1650
1651#ifdef CONFIG_PM
cb639a42 1652/* suspend callback: state argument ignored */
1da177e4 1653
cb639a42
TI		 1654static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream,
1655 snd_pcm_state_t state)
1da177e4 1656{
877211f5 1657 struct snd_pcm_runtime *runtime = substream->runtime;
113ce081
TI		 1658 switch (runtime->status->state) {
1659 case SNDRV_PCM_STATE_SUSPENDED:
1da177e4 1660 return -EBUSY;
113ce081
TI		 1661 /* unresumable PCM state; return -EBUSY for skipping suspend */
1662 case SNDRV_PCM_STATE_OPEN:
1663 case SNDRV_PCM_STATE_SETUP:
1664 case SNDRV_PCM_STATE_DISCONNECTED:
1665 return -EBUSY;
1666 }
1da177e4
LT		 1667 runtime->trigger_master = substream;
1668 return 0;
1669}
1670
cb639a42
TI		 1671static int snd_pcm_do_suspend(struct snd_pcm_substream *substream,
1672 snd_pcm_state_t state)
1da177e4 1673{
877211f5 1674 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1675 if (runtime->trigger_master != substream)
1676 return 0;
1677 if (! snd_pcm_running(substream))
1678 return 0;
1679 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
2c87c1a4 1680 runtime->stop_operating = true;
1da177e4
LT		 1681 return 0; /* suspend unconditionally */
1682}
1683
cb639a42
TI		 1684static void snd_pcm_post_suspend(struct snd_pcm_substream *substream,
1685 snd_pcm_state_t state)
1da177e4 1686{
877211f5 1687 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1688 snd_pcm_trigger_tstamp(substream);
9bc889b4
TI		 1689 runtime->status->suspended_state = runtime->status->state;
1690 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
90bbaf66 1691 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
1da177e4 1692 wake_up(&runtime->sleep);
c91a988d 1693 wake_up(&runtime->tsleep);
1da177e4
LT		 1694}
1695
b17154cf 1696static const struct action_ops snd_pcm_action_suspend = {
1da177e4
LT		 1697 .pre_action = snd_pcm_pre_suspend,
1698 .do_action = snd_pcm_do_suspend,
1699 .post_action = snd_pcm_post_suspend
1700};
1701
ce7f93e2 1702/*
1c85cc64 1703 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1704 * @substream: the PCM substream
1da177e4 1705 *
1da177e4 1706 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8 1707 *
ce7f93e2 1708 * Return: Zero if successful, or a negative error code.
1da177e4 1709 */
ce7f93e2 1710static int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1711{
1712 int err;
1713 unsigned long flags;
1714
1715 snd_pcm_stream_lock_irqsave(substream, flags);
cb639a42
TI		 1716 err = snd_pcm_action(&snd_pcm_action_suspend, substream,
1717 ACTION_ARG_IGNORE);
1da177e4
LT		 1718 snd_pcm_stream_unlock_irqrestore(substream, flags);
1719 return err;
1720}
e88e8ae6 1721
1da177e4 1722/**
1c85cc64 1723 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1724 * @pcm: the PCM instance
1da177e4 1725 *
1da177e4 1726 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1727 *
1728 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1da177e4 1729 */
877211f5 1730int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1731{
877211f5 1732 struct snd_pcm_substream *substream;
1da177e4
LT		 1733 int stream, err = 0;
1734
603bf524
TI		 1735 if (! pcm)
1736 return 0;
1737
8d19b4e0
TI		 1738 for_each_pcm_substream(pcm, stream, substream) {
1739 /* FIXME: the open/close code should lock this as well */
1740 if (!substream->runtime)
1741 continue;
1742
1743 /*
1744 * Skip BE dai link PCM's that are internal and may
1745 * not have their substream ops set.
1746 */
1747 if (!substream->ops)
1748 continue;
1749
1750 err = snd_pcm_suspend(substream);
1751 if (err < 0 && err != -EBUSY)
1752 return err;
1da177e4 1753 }
2c87c1a4 1754
8d19b4e0
TI		 1755 for_each_pcm_substream(pcm, stream, substream)
1756 snd_pcm_sync_stop(substream, false);
2c87c1a4 1757
1da177e4
LT		 1758 return 0;
1759}
e88e8ae6
TI		 1760EXPORT_SYMBOL(snd_pcm_suspend_all);
1761
cb639a42 1762/* resume callbacks: state argument ignored */
1da177e4 1763
cb639a42
TI		 1764static int snd_pcm_pre_resume(struct snd_pcm_substream *substream,
1765 snd_pcm_state_t state)
1da177e4 1766{
877211f5 1767 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1768 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1769 return -ENOSYS;
1770 runtime->trigger_master = substream;
1771 return 0;
1772}
1773
cb639a42
TI		 1774static int snd_pcm_do_resume(struct snd_pcm_substream *substream,
1775 snd_pcm_state_t state)
1da177e4 1776{
877211f5 1777 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1778 if (runtime->trigger_master != substream)
1779 return 0;
1780 /* DMA not running previously? */
1781 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1782 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1783 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1784 return 0;
1785 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1786}
1787
cb639a42
TI		 1788static void snd_pcm_undo_resume(struct snd_pcm_substream *substream,
1789 snd_pcm_state_t state)
1da177e4
LT		 1790{
1791 if (substream->runtime->trigger_master == substream &&
1792 snd_pcm_running(substream))
1793 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1794}
1795
cb639a42
TI		 1796static void snd_pcm_post_resume(struct snd_pcm_substream *substream,
1797 snd_pcm_state_t state)
1da177e4 1798{
877211f5 1799 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1800 snd_pcm_trigger_tstamp(substream);
9bc889b4 1801 runtime->status->state = runtime->status->suspended_state;
90bbaf66 1802 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
1da177e4
LT		 1803}
1804
b17154cf 1805static const struct action_ops snd_pcm_action_resume = {
1da177e4
LT		 1806 .pre_action = snd_pcm_pre_resume,
1807 .do_action = snd_pcm_do_resume,
1808 .undo_action = snd_pcm_undo_resume,
1809 .post_action = snd_pcm_post_resume
1810};
1811
877211f5 1812static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1813{
cb639a42
TI		 1814 return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream,
1815 ACTION_ARG_IGNORE);
1da177e4
LT		 1816}
1817
1818#else
1819
877211f5 1820static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1821{
1822 return -ENOSYS;
1823}
1824
1825#endif /* CONFIG_PM */
1826
1827/*
1828 * xrun ioctl
1829 *
1830 * Change the RUNNING stream(s) to XRUN state.
1831 */
877211f5 1832static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1833{
877211f5 1834 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1835 int result;
1836
1da177e4
LT		 1837 snd_pcm_stream_lock_irq(substream);
1838 switch (runtime->status->state) {
1839 case SNDRV_PCM_STATE_XRUN:
1840 result = 0; /* already there */
1841 break;
1842 case SNDRV_PCM_STATE_RUNNING:
9cd641ed
TI		 1843 __snd_pcm_xrun(substream);
1844 result = 0;
1da177e4
LT		 1845 break;
1846 default:
1847 result = -EBADFD;
1848 }
1849 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1850 return result;
1851}
1852
1853/*
1854 * reset ioctl
1855 */
cb639a42
TI		 1856/* reset callbacks: state argument ignored */
1857static int snd_pcm_pre_reset(struct snd_pcm_substream *substream,
1858 snd_pcm_state_t state)
1da177e4 1859{
877211f5 1860 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1861 switch (runtime->status->state) {
1862 case SNDRV_PCM_STATE_RUNNING:
1863 case SNDRV_PCM_STATE_PREPARED:
1864 case SNDRV_PCM_STATE_PAUSED:
1865 case SNDRV_PCM_STATE_SUSPENDED:
1866 return 0;
1867 default:
1868 return -EBADFD;
1869 }
1870}
1871
cb639a42
TI		 1872static int snd_pcm_do_reset(struct snd_pcm_substream *substream,
1873 snd_pcm_state_t state)
1da177e4 1874{
877211f5 1875 struct snd_pcm_runtime *runtime = substream->runtime;
fc033cbf 1876 int err = snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1da177e4
LT		 1877 if (err < 0)
1878 return err;
31913909 1879 snd_pcm_stream_lock_irq(substream);
1da177e4 1880 runtime->hw_ptr_base = 0;
e7636925
JK		 1881 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1882 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1883 runtime->silence_start = runtime->status->hw_ptr;
1884 runtime->silence_filled = 0;
31913909 1885 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1886 return 0;
1887}
1888
cb639a42
TI		 1889static void snd_pcm_post_reset(struct snd_pcm_substream *substream,
1890 snd_pcm_state_t state)
1da177e4 1891{
877211f5 1892 struct snd_pcm_runtime *runtime = substream->runtime;
31913909 1893 snd_pcm_stream_lock_irq(substream);
1da177e4
LT		 1894 runtime->control->appl_ptr = runtime->status->hw_ptr;
1895 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1896 runtime->silence_size > 0)
1897 snd_pcm_playback_silence(substream, ULONG_MAX);
31913909 1898 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1899}
1900
b17154cf 1901static const struct action_ops snd_pcm_action_reset = {
1da177e4
LT		 1902 .pre_action = snd_pcm_pre_reset,
1903 .do_action = snd_pcm_do_reset,
1904 .post_action = snd_pcm_post_reset
1905};
1906
877211f5 1907static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4 1908{
cb639a42
TI		 1909 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream,
1910 ACTION_ARG_IGNORE);
1da177e4
LT		 1911}
1912
1913/*
1914 * prepare ioctl
1915 */
cb639a42 1916/* pass f_flags as state argument */
0df63e44 1917static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
cb639a42 1918 snd_pcm_state_t state)
1da177e4 1919{
877211f5 1920 struct snd_pcm_runtime *runtime = substream->runtime;
cb639a42
TI		 1921 int f_flags = (__force int)state;
1922
de1b8b93
TI		 1923 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1924 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1925 return -EBADFD;
1926 if (snd_pcm_running(substream))
1927 return -EBUSY;
0df63e44 1928 substream->f_flags = f_flags;
1da177e4
LT		 1929 return 0;
1930}
1931
cb639a42
TI		 1932static int snd_pcm_do_prepare(struct snd_pcm_substream *substream,
1933 snd_pcm_state_t state)
1da177e4
LT		 1934{
1935 int err;
29bb274e 1936 snd_pcm_sync_stop(substream, true);
1da177e4
LT		 1937 err = substream->ops->prepare(substream);
1938 if (err < 0)
1939 return err;
cb639a42 1940 return snd_pcm_do_reset(substream, state);
1da177e4
LT		 1941}
1942
cb639a42
TI		 1943static void snd_pcm_post_prepare(struct snd_pcm_substream *substream,
1944 snd_pcm_state_t state)
1da177e4 1945{
877211f5 1946 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1947 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1948 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1949}
1950
b17154cf 1951static const struct action_ops snd_pcm_action_prepare = {
1da177e4
LT		 1952 .pre_action = snd_pcm_pre_prepare,
1953 .do_action = snd_pcm_do_prepare,
1954 .post_action = snd_pcm_post_prepare
1955};
1956
1957/**
1c85cc64 1958 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1959 * @substream: the PCM substream instance
0df63e44 1960 * @file: file to refer f_flags
eb7c06e8
YB		 1961 *
1962 * Return: Zero if successful, or a negative error code.
1da177e4 1963 */
0df63e44
TI		 1964static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1965 struct file *file)
1da177e4 1966{
0df63e44
TI		 1967 int f_flags;
1968
1969 if (file)
1970 f_flags = file->f_flags;
1971 else
1972 f_flags = substream->f_flags;
1da177e4 1973
1b745cd9
TI		 1974 snd_pcm_stream_lock_irq(substream);
1975 switch (substream->runtime->status->state) {
1976 case SNDRV_PCM_STATE_PAUSED:
cb639a42 1977 snd_pcm_pause(substream, false);
c0dbbdad 1978 fallthrough;
1b745cd9
TI		 1979 case SNDRV_PCM_STATE_SUSPENDED:
1980 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1981 break;
1982 }
1983 snd_pcm_stream_unlock_irq(substream);
1984
68b4acd3 1985 return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
cb639a42
TI		 1986 substream,
1987 (__force snd_pcm_state_t)f_flags);
1da177e4
LT		 1988}
1989
1990/*
1991 * drain ioctl
1992 */
1993
cb639a42
TI		 1994/* drain init callbacks: state argument ignored */
1995static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream,
1996 snd_pcm_state_t state)
1da177e4 1997{
4f7c39dc
TI		 1998 struct snd_pcm_runtime *runtime = substream->runtime;
1999 switch (runtime->status->state) {
2000 case SNDRV_PCM_STATE_OPEN:
2001 case SNDRV_PCM_STATE_DISCONNECTED:
2002 case SNDRV_PCM_STATE_SUSPENDED:
2003 return -EBADFD;
2004 }
2005 runtime->trigger_master = substream;
1da177e4
LT		 2006 return 0;
2007}
2008
cb639a42
TI		 2009static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream,
2010 snd_pcm_state_t state)
1da177e4 2011{
877211f5 2012 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2013 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
2014 switch (runtime->status->state) {
2015 case SNDRV_PCM_STATE_PREPARED:
2016 /* start playback stream if possible */
2017 if (! snd_pcm_playback_empty(substream)) {
2018 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
2019 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
70372a75
TI		 2020 } else {
2021 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1da177e4
LT		 2022 }
2023 break;
2024 case SNDRV_PCM_STATE_RUNNING:
2025 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
2026 break;
4f7c39dc
TI		 2027 case SNDRV_PCM_STATE_XRUN:
2028 runtime->status->state = SNDRV_PCM_STATE_SETUP;
2029 break;
1da177e4
LT		 2030 default:
2031 break;
2032 }
2033 } else {
2034 /* stop running stream */
2035 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
cb639a42
TI		 2036 snd_pcm_state_t new_state;
2037
2038 new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 2039 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 2040 snd_pcm_do_stop(substream, new_state);
2041 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 2042 }
2043 }
48d88297
LY		 2044
2045 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
2046 runtime->trigger_master == substream &&
2047 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
2048 return substream->ops->trigger(substream,
2049 SNDRV_PCM_TRIGGER_DRAIN);
2050
1da177e4
LT		 2051 return 0;
2052}
2053
cb639a42
TI		 2054static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream,
2055 snd_pcm_state_t state)
1da177e4
LT		 2056{
2057}
2058
b17154cf 2059static const struct action_ops snd_pcm_action_drain_init = {
1da177e4
LT		 2060 .pre_action = snd_pcm_pre_drain_init,
2061 .do_action = snd_pcm_do_drain_init,
2062 .post_action = snd_pcm_post_drain_init
2063};
2064
1da177e4
LT		 2065/*
2066 * Drain the stream(s).
2067 * When the substream is linked, sync until the draining of all playback streams
2068 * is finished.
2069 * After this call, all streams are supposed to be either SETUP or DRAINING
2070 * (capture only) state.
2071 */
4cdc115f
TI		 2072static int snd_pcm_drain(struct snd_pcm_substream *substream,
2073 struct file *file)
1da177e4 2074{
877211f5
TI		 2075 struct snd_card *card;
2076 struct snd_pcm_runtime *runtime;
ef991b95 2077 struct snd_pcm_substream *s;
f57f3df0 2078 struct snd_pcm_group *group;
ac6424b9 2079 wait_queue_entry_t wait;
1da177e4 2080 int result = 0;
4cdc115f 2081 int nonblock = 0;
1da177e4 2082
1da177e4
LT		 2083 card = substream->pcm->card;
2084 runtime = substream->runtime;
2085
2086 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2087 return -EBADFD;
2088
4cdc115f
TI		 2089 if (file) {
2090 if (file->f_flags & O_NONBLOCK)
2091 nonblock = 1;
2092 } else if (substream->f_flags & O_NONBLOCK)
2093 nonblock = 1;
2094
21cb2a2e
TI		 2095 snd_pcm_stream_lock_irq(substream);
2096 /* resume pause */
d3a7dcfe 2097 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
cb639a42 2098 snd_pcm_pause(substream, false);
21cb2a2e
TI		 2099
2100 /* pre-start/stop - all running streams are changed to DRAINING state */
cb639a42
TI		 2101 result = snd_pcm_action(&snd_pcm_action_drain_init, substream,
2102 ACTION_ARG_IGNORE);
4cdc115f
TI		 2103 if (result < 0)
2104 goto unlock;
2105 /* in non-blocking, we don't wait in ioctl but let caller poll */
2106 if (nonblock) {
2107 result = -EAGAIN;
2108 goto unlock;
21cb2a2e 2109 }
1da177e4
LT		 2110
2111 for (;;) {
2112 long tout;
d3a7dcfe 2113 struct snd_pcm_runtime *to_check;
1da177e4
LT		 2114 if (signal_pending(current)) {
2115 result = -ERESTARTSYS;
2116 break;
2117 }
d3a7dcfe
TI		 2118 /* find a substream to drain */
2119 to_check = NULL;
f57f3df0 2120 group = snd_pcm_stream_group_ref(substream);
d3a7dcfe
TI		 2121 snd_pcm_group_for_each_entry(s, substream) {
2122 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
2123 continue;
2124 runtime = s->runtime;
2125 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
2126 to_check = runtime;
21cb2a2e 2127 break;
d3a7dcfe 2128 }
21cb2a2e 2129 }
f57f3df0 2130 snd_pcm_group_unref(group, substream);
d3a7dcfe
TI		 2131 if (!to_check)
2132 break; /* all drained */
2133 init_waitqueue_entry(&wait, current);
37151a41 2134 set_current_state(TASK_INTERRUPTIBLE);
d3a7dcfe 2135 add_wait_queue(&to_check->sleep, &wait);
1da177e4 2136 snd_pcm_stream_unlock_irq(substream);
f2b3614c
TI		 2137 if (runtime->no_period_wakeup)
2138 tout = MAX_SCHEDULE_TIMEOUT;
2139 else {
2140 tout = 10;
2141 if (runtime->rate) {
2142 long t = runtime->period_size * 2 / runtime->rate;
2143 tout = max(t, tout);
2144 }
2145 tout = msecs_to_jiffies(tout * 1000);
2146 }
37151a41 2147 tout = schedule_timeout(tout);
f57f3df0 2148
1da177e4 2149 snd_pcm_stream_lock_irq(substream);
f57f3df0
TI		 2150 group = snd_pcm_stream_group_ref(substream);
2151 snd_pcm_group_for_each_entry(s, substream) {
2152 if (s->runtime == to_check) {
2153 remove_wait_queue(&to_check->sleep, &wait);
2154 break;
2155 }
2156 }
2157 snd_pcm_group_unref(group, substream);
2158
0914f796
TI		 2159 if (card->shutdown) {
2160 result = -ENODEV;
2161 break;
2162 }
1da177e4
LT		 2163 if (tout == 0) {
2164 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
2165 result = -ESTRPIPE;
2166 else {
09e56df8
TI		 2167 dev_dbg(substream->pcm->card->dev,
2168 "playback drain error (DMA or IRQ trouble?)\n");
1da177e4
LT		 2169 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
2170 result = -EIO;
2171 }
2172 break;
2173 }
1da177e4 2174 }
21cb2a2e 2175
4cdc115f 2176 unlock:
21cb2a2e 2177 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 2178
2179 return result;
2180}
2181
2182/*
2183 * drop ioctl
2184 *
2185 * Immediately put all linked substreams into SETUP state.
2186 */
877211f5 2187static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 2188{
877211f5 2189 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2190 int result = 0;
2191
7eaa943c
TI		 2192 if (PCM_RUNTIME_CHECK(substream))
2193 return -ENXIO;
1da177e4 2194 runtime = substream->runtime;
1da177e4 2195
de1b8b93 2196 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
4b95ff78 2197 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 2198 return -EBADFD;
2199
1da177e4
LT		 2200 snd_pcm_stream_lock_irq(substream);
2201 /* resume pause */
2202 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
cb639a42 2203 snd_pcm_pause(substream, false);
1da177e4
LT		 2204
2205 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
2206 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
2207 snd_pcm_stream_unlock_irq(substream);
24e8fc49 2208
1da177e4
LT		 2209 return result;
2210}
2211
2212
0888c321 2213static bool is_pcm_file(struct file *file)
1da177e4 2214{
0888c321 2215 struct inode *inode = file_inode(file);
d819fb21 2216 struct snd_pcm *pcm;
f87135f5
CL		 2217 unsigned int minor;
2218
0888c321
AV		 2219 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
2220 return false;
1da177e4 2221 minor = iminor(inode);
d819fb21
TI		 2222 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2223 if (!pcm)
2224 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2225 if (!pcm)
2226 return false;
2227 snd_card_unref(pcm->card);
2228 return true;
1da177e4
LT		 2229}
2230
2231/*
2232 * PCM link handling
2233 */
877211f5 2234static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 2235{
2236 int res = 0;
877211f5
TI		 2237 struct snd_pcm_file *pcm_file;
2238 struct snd_pcm_substream *substream1;
f57f3df0
TI		 2239 struct snd_pcm_group *group, *target_group;
2240 bool nonatomic = substream->pcm->nonatomic;
0888c321 2241 struct fd f = fdget(fd);
1da177e4 2242
0888c321 2243 if (!f.file)
1da177e4 2244 return -EBADFD;
0888c321
AV		 2245 if (!is_pcm_file(f.file)) {
2246 res = -EBADFD;
2247 goto _badf;
2248 }
2249 pcm_file = f.file->private_data;
1da177e4 2250 substream1 = pcm_file->substream;
951e2736
MM		 2251
2252 if (substream == substream1) {
2253 res = -EINVAL;
2254 goto _badf;
2255 }
2256
73365cb1 2257 group = kzalloc(sizeof(*group), GFP_KERNEL);
1662591b
TI		 2258 if (!group) {
2259 res = -ENOMEM;
2260 goto _nolock;
2261 }
73365cb1 2262 snd_pcm_group_init(group);
f57f3df0 2263
ecb41f0f 2264 down_write(&snd_pcm_link_rwsem);
1da177e4 2265 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
257f8cce
TI		 2266 substream->runtime->status->state != substream1->runtime->status->state ||
2267 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1da177e4
LT		 2268 res = -EBADFD;
2269 goto _end;
2270 }
2271 if (snd_pcm_stream_linked(substream1)) {
2272 res = -EALREADY;
2273 goto _end;
2274 }
f57f3df0
TI		 2275
2276 snd_pcm_stream_lock_irq(substream);
1da177e4 2277 if (!snd_pcm_stream_linked(substream)) {
a41c4cb9 2278 snd_pcm_group_assign(substream, group);
f57f3df0 2279 group = NULL; /* assigned, don't free this one below */
1da177e4 2280 }
f57f3df0
TI		 2281 target_group = substream->group;
2282 snd_pcm_stream_unlock_irq(substream);
2283
2284 snd_pcm_group_lock_irq(target_group, nonatomic);
e18035cf 2285 snd_pcm_stream_lock_nested(substream1);
f57f3df0 2286 snd_pcm_group_assign(substream1, target_group);
0e279dce 2287 refcount_inc(&target_group->refs);
f57f3df0
TI		 2288 snd_pcm_stream_unlock(substream1);
2289 snd_pcm_group_unlock_irq(target_group, nonatomic);
1da177e4 2290 _end:
1da177e4 2291 up_write(&snd_pcm_link_rwsem);
1662591b 2292 _nolock:
dd6c5cd8 2293 kfree(group);
0888c321
AV		 2294 _badf:
2295 fdput(f);
1da177e4
LT		 2296 return res;
2297}
2298
877211f5 2299static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4 2300{
e18035cf 2301 snd_pcm_stream_lock_nested(substream);
a41c4cb9 2302 snd_pcm_group_assign(substream, &substream->self_group);
f57f3df0 2303 snd_pcm_stream_unlock(substream);
1da177e4
LT		 2304}
2305
877211f5 2306static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 2307{
a41c4cb9 2308 struct snd_pcm_group *group;
f57f3df0
TI		 2309 bool nonatomic = substream->pcm->nonatomic;
2310 bool do_free = false;
1da177e4
LT		 2311 int res = 0;
2312
ecb41f0f 2313 down_write(&snd_pcm_link_rwsem);
f57f3df0 2314
1da177e4
LT		 2315 if (!snd_pcm_stream_linked(substream)) {
2316 res = -EALREADY;
2317 goto _end;
2318 }
a41c4cb9
TI		 2319
2320 group = substream->group;
f57f3df0 2321 snd_pcm_group_lock_irq(group, nonatomic);
a41c4cb9 2322
1da177e4 2323 relink_to_local(substream);
0e279dce 2324 refcount_dec(&group->refs);
a41c4cb9
TI		 2325
2326 /* detach the last stream, too */
2327 if (list_is_singular(&group->substreams)) {
7df5a5f6
TI		 2328 relink_to_local(list_first_entry(&group->substreams,
2329 struct snd_pcm_substream,
2330 link_list));
0e279dce 2331 do_free = refcount_dec_and_test(&group->refs);
1da177e4 2332 }
a41c4cb9 2333
f57f3df0
TI		 2334 snd_pcm_group_unlock_irq(group, nonatomic);
2335 if (do_free)
2336 kfree(group);
2337
1da177e4 2338 _end:
1da177e4
LT		 2339 up_write(&snd_pcm_link_rwsem);
2340 return res;
2341}
2342
2343/*
2344 * hw configurator
2345 */
877211f5
TI		 2346static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
2347 struct snd_pcm_hw_rule *rule)
1da177e4 2348{
877211f5 2349 struct snd_interval t;
1da177e4
LT		 2350 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
2351 hw_param_interval_c(params, rule->deps[1]), &t);
2352 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2353}
2354
877211f5
TI		 2355static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
2356 struct snd_pcm_hw_rule *rule)
1da177e4 2357{
877211f5 2358 struct snd_interval t;
1da177e4
LT		 2359 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
2360 hw_param_interval_c(params, rule->deps[1]), &t);
2361 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2362}
2363
877211f5
TI		 2364static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
2365 struct snd_pcm_hw_rule *rule)
1da177e4 2366{
877211f5 2367 struct snd_interval t;
1da177e4
LT		 2368 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
2369 hw_param_interval_c(params, rule->deps[1]),
2370 (unsigned long) rule->private, &t);
2371 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2372}
2373
877211f5
TI		 2374static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
2375 struct snd_pcm_hw_rule *rule)
1da177e4 2376{
877211f5 2377 struct snd_interval t;
1da177e4
LT		 2378 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
2379 (unsigned long) rule->private,
2380 hw_param_interval_c(params, rule->deps[1]), &t);
2381 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2382}
2383
877211f5
TI		 2384static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
2385 struct snd_pcm_hw_rule *rule)
1da177e4 2386{
ba71d227 2387 snd_pcm_format_t k;
b55f9fdc
TS		 2388 const struct snd_interval *i =
2389 hw_param_interval_c(params, rule->deps[0]);
877211f5
TI		 2390 struct snd_mask m;
2391 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4 2392 snd_mask_any(&m);
ba71d227 2393 pcm_for_each_format(k) {
1da177e4 2394 int bits;
ba71d227 2395 if (!snd_mask_test_format(mask, k))
1da177e4
LT		 2396 continue;
2397 bits = snd_pcm_format_physical_width(k);
2398 if (bits <= 0)
2399 continue; /* ignore invalid formats */
2400 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
ba71d227 2401 snd_mask_reset(&m, (__force unsigned)k);
1da177e4
LT		 2402 }
2403 return snd_mask_refine(mask, &m);
2404}
2405
877211f5
TI		 2406static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
2407 struct snd_pcm_hw_rule *rule)
1da177e4 2408{
877211f5 2409 struct snd_interval t;
ba71d227
TI		 2410 snd_pcm_format_t k;
2411
1da177e4
LT		 2412 t.min = UINT_MAX;
2413 t.max = 0;
2414 t.openmin = 0;
2415 t.openmax = 0;
ba71d227 2416 pcm_for_each_format(k) {
1da177e4 2417 int bits;
ba71d227 2418 if (!snd_mask_test_format(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1da177e4
LT		 2419 continue;
2420 bits = snd_pcm_format_physical_width(k);
2421 if (bits <= 0)
2422 continue; /* ignore invalid formats */
2423 if (t.min > (unsigned)bits)
2424 t.min = bits;
2425 if (t.max < (unsigned)bits)
2426 t.max = bits;
2427 }
2428 t.integer = 1;
2429 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2430}
2431
2432#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
2433#error "Change this table"
2434#endif
2435
8b674308
TS		 2436static const unsigned int rates[] = {
2437 5512, 8000, 11025, 16000, 22050, 32000, 44100,
4cc4531c 2438 48000, 64000, 88200, 96000, 176400, 192000, 352800, 384000
8b674308 2439};
1da177e4 2440
7653d557
CL		 2441const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
2442 .count = ARRAY_SIZE(rates),
2443 .list = rates,
2444};
2445
877211f5
TI		 2446static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
2447 struct snd_pcm_hw_rule *rule)
1da177e4 2448{
877211f5 2449 struct snd_pcm_hardware *hw = rule->private;
1da177e4 2450 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 2451 snd_pcm_known_rates.count,
2452 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 2453}
2454
877211f5
TI		 2455static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2456 struct snd_pcm_hw_rule *rule)
1da177e4 2457{
877211f5
TI		 2458 struct snd_interval t;
2459 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 2460 t.min = 0;
2461 t.max = substream->buffer_bytes_max;
2462 t.openmin = 0;
2463 t.openmax = 0;
2464 t.integer = 1;
2465 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2466}
2467
d662117c 2468static int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 2469{
877211f5
TI		 2470 struct snd_pcm_runtime *runtime = substream->runtime;
2471 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 2472 int k, err;
2473
2474 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2475 snd_mask_any(constrs_mask(constrs, k));
2476 }
2477
2478 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2479 snd_interval_any(constrs_interval(constrs, k));
2480 }
2481
2482 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2483 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2484 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2485 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2486 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2487
2488 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2489 snd_pcm_hw_rule_format, NULL,
2490 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2491 if (err < 0)
2492 return err;
2493 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2494 snd_pcm_hw_rule_sample_bits, NULL,
2495 SNDRV_PCM_HW_PARAM_FORMAT,
2496 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2497 if (err < 0)
2498 return err;
2499 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2500 snd_pcm_hw_rule_div, NULL,
2501 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2502 if (err < 0)
2503 return err;
2504 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2505 snd_pcm_hw_rule_mul, NULL,
2506 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2507 if (err < 0)
2508 return err;
2509 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2510 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2511 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2512 if (err < 0)
2513 return err;
2514 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2515 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2516 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2517 if (err < 0)
2518 return err;
2519 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2520 snd_pcm_hw_rule_div, NULL,
2521 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2522 if (err < 0)
2523 return err;
2524 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2525 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2526 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2527 if (err < 0)
2528 return err;
2529 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2530 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2531 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2532 if (err < 0)
2533 return err;
2534 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2535 snd_pcm_hw_rule_div, NULL,
2536 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2537 if (err < 0)
2538 return err;
2539 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2540 snd_pcm_hw_rule_div, NULL,
2541 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2542 if (err < 0)
2543 return err;
2544 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2545 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2546 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2547 if (err < 0)
2548 return err;
2549 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2550 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2551 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2552 if (err < 0)
2553 return err;
2554 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2555 snd_pcm_hw_rule_mul, NULL,
2556 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2557 if (err < 0)
2558 return err;
2559 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2560 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2561 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2562 if (err < 0)
2563 return err;
2564 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2565 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2566 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2567 if (err < 0)
2568 return err;
2569 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2570 snd_pcm_hw_rule_muldivk, (void*) 8,
2571 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2572 if (err < 0)
2573 return err;
2574 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2575 snd_pcm_hw_rule_muldivk, (void*) 8,
2576 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2577 if (err < 0)
2578 return err;
2579 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2580 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2581 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2582 if (err < 0)
2583 return err;
2584 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2585 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2586 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2587 if (err < 0)
2588 return err;
2589 return 0;
2590}
2591
d662117c 2592static int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 2593{
877211f5
TI		 2594 struct snd_pcm_runtime *runtime = substream->runtime;
2595 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 2596 int err;
2597 unsigned int mask = 0;
2598
2599 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
f9b0c053 2600 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_RW_INTERLEAVED);
1da177e4 2601 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
f9b0c053 2602 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
63825f3a 2603 if (hw_support_mmap(substream)) {
1da177e4 2604 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
f9b0c053 2605 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
1da177e4 2606 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
f9b0c053 2607 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED);
1da177e4 2608 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
f9b0c053 2609 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_COMPLEX);
1da177e4
LT		 2610 }
2611 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 2612 if (err < 0)
2613 return err;
1da177e4
LT		 2614
2615 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 2616 if (err < 0)
2617 return err;
1da177e4 2618
f9b0c053
TI		 2619 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT,
2620 PARAM_MASK_BIT(SNDRV_PCM_SUBFORMAT_STD));
7eaa943c
TI		 2621 if (err < 0)
2622 return err;
1da177e4
LT		 2623
2624 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2625 hw->channels_min, hw->channels_max);
7eaa943c
TI		 2626 if (err < 0)
2627 return err;
1da177e4
LT		 2628
2629 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2630 hw->rate_min, hw->rate_max);
8b90ca08
GL		 2631 if (err < 0)
2632 return err;
1da177e4
LT		 2633
2634 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2635 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 2636 if (err < 0)
2637 return err;
1da177e4
LT		 2638
2639 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2640 hw->periods_min, hw->periods_max);
7eaa943c
TI		 2641 if (err < 0)
2642 return err;
1da177e4
LT		 2643
2644 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2645 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 2646 if (err < 0)
2647 return err;
1da177e4
LT		 2648
2649 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2650 snd_pcm_hw_rule_buffer_bytes_max, substream,
2651 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2652 if (err < 0)
2653 return err;
2654
2655 /* FIXME: remove */
2656 if (runtime->dma_bytes) {
2657 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c 2658 if (err < 0)
6cf95152 2659 return err;
1da177e4
LT		 2660 }
2661
2662 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2663 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2664 snd_pcm_hw_rule_rate, hw,
2665 SNDRV_PCM_HW_PARAM_RATE, -1);
2666 if (err < 0)
2667 return err;
2668 }
2669
2670 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2671 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2672
2673 return 0;
2674}
2675
3bf75f9b 2676static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2677{
b51abed8
TI		 2678 if (snd_pcm_stream_linked(substream))
2679 snd_pcm_unlink(substream);
3bf75f9b
TI		 2680}
2681
2682void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2683{
0df63e44
TI		 2684 substream->ref_count--;
2685 if (substream->ref_count > 0)
2686 return;
2687
3bf75f9b 2688 snd_pcm_drop(substream);
3bf75f9b 2689 if (substream->hw_opened) {
0fbb027b
TI		 2690 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
2691 do_hw_free(substream);
1da177e4 2692 substream->ops->close(substream);
3bf75f9b 2693 substream->hw_opened = 0;
1da177e4 2694 }
5371a79b
RW		 2695 if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req))
2696 cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2697 if (substream->pcm_release) {
2698 substream->pcm_release(substream);
2699 substream->pcm_release = NULL;
2700 }
3bf75f9b
TI		 2701 snd_pcm_detach_substream(substream);
2702}
e88e8ae6
TI		 2703EXPORT_SYMBOL(snd_pcm_release_substream);
2704
3bf75f9b
TI		 2705int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2706 struct file *file,
2707 struct snd_pcm_substream **rsubstream)
2708{
2709 struct snd_pcm_substream *substream;
2710 int err;
2711
2712 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2713 if (err < 0)
2714 return err;
0df63e44
TI		 2715 if (substream->ref_count > 1) {
2716 *rsubstream = substream;
2717 return 0;
2718 }
2719
3bf75f9b
TI		 2720 err = snd_pcm_hw_constraints_init(substream);
2721 if (err < 0) {
09e56df8 2722 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
3bf75f9b
TI		 2723 goto error;
2724 }
2725
137c171c
TI		 2726 err = substream->ops->open(substream);
2727 if (err < 0)
3bf75f9b
TI		 2728 goto error;
2729
2730 substream->hw_opened = 1;
2731
2732 err = snd_pcm_hw_constraints_complete(substream);
2733 if (err < 0) {
09e56df8 2734 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
3bf75f9b
TI		 2735 goto error;
2736 }
2737
2738 *rsubstream = substream;
1da177e4 2739 return 0;
3bf75f9b
TI		 2740
2741 error:
2742 snd_pcm_release_substream(substream);
2743 return err;
1da177e4 2744}
e88e8ae6
TI		 2745EXPORT_SYMBOL(snd_pcm_open_substream);
2746
1da177e4 2747static int snd_pcm_open_file(struct file *file,
877211f5 2748 struct snd_pcm *pcm,
ffd3d5c6 2749 int stream)
1da177e4 2750{
877211f5
TI		 2751 struct snd_pcm_file *pcm_file;
2752 struct snd_pcm_substream *substream;
3bf75f9b 2753 int err;
1da177e4 2754
3bf75f9b
TI		 2755 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2756 if (err < 0)
2757 return err;
2758
548a648b
TI		 2759 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2760 if (pcm_file == NULL) {
2761 snd_pcm_release_substream(substream);
2762 return -ENOMEM;
2763 }
2764 pcm_file->substream = substream;
de89750c 2765 if (substream->ref_count == 1)
0df63e44 2766 substream->pcm_release = pcm_release_private;
1da177e4 2767 file->private_data = pcm_file;
ffd3d5c6 2768
1da177e4
LT		 2769 return 0;
2770}
2771
f87135f5
CL		 2772static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2773{
2774 struct snd_pcm *pcm;
02f4865f
TI		 2775 int err = nonseekable_open(inode, file);
2776 if (err < 0)
2777 return err;
f87135f5
CL		 2778 pcm = snd_lookup_minor_data(iminor(inode),
2779 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd 2780 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
8bb4d9ce
TI		 2781 if (pcm)
2782 snd_card_unref(pcm->card);
a0830dbd 2783 return err;
f87135f5
CL		 2784}
2785
2786static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2787{
877211f5 2788 struct snd_pcm *pcm;
02f4865f
TI		 2789 int err = nonseekable_open(inode, file);
2790 if (err < 0)
2791 return err;
f87135f5
CL		 2792 pcm = snd_lookup_minor_data(iminor(inode),
2793 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd 2794 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
8bb4d9ce
TI		 2795 if (pcm)
2796 snd_card_unref(pcm->card);
a0830dbd 2797 return err;
f87135f5
CL		 2798}
2799
2800static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2801{
2802 int err;
ac6424b9 2803 wait_queue_entry_t wait;
1da177e4 2804
1da177e4
LT		 2805 if (pcm == NULL) {
2806 err = -ENODEV;
2807 goto __error1;
2808 }
2809 err = snd_card_file_add(pcm->card, file);
2810 if (err < 0)
2811 goto __error1;
2812 if (!try_module_get(pcm->card->module)) {
2813 err = -EFAULT;
2814 goto __error2;
2815 }
2816 init_waitqueue_entry(&wait, current);
2817 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2818 mutex_lock(&pcm->open_mutex);
1da177e4 2819 while (1) {
ffd3d5c6 2820 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2821 if (err >= 0)
2822 break;
2823 if (err == -EAGAIN) {
2824 if (file->f_flags & O_NONBLOCK) {
2825 err = -EBUSY;
2826 break;
2827 }
2828 } else
2829 break;
2830 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2831 mutex_unlock(&pcm->open_mutex);
1da177e4 2832 schedule();
1a60d4c5 2833 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2834 if (pcm->card->shutdown) {
2835 err = -ENODEV;
2836 break;
2837 }
1da177e4
LT		 2838 if (signal_pending(current)) {
2839 err = -ERESTARTSYS;
2840 break;
2841 }
2842 }
2843 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2844 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2845 if (err < 0)
2846 goto __error;
2847 return err;
2848
2849 __error:
2850 module_put(pcm->card->module);
2851 __error2:
2852 snd_card_file_remove(pcm->card, file);
2853 __error1:
2854 return err;
2855}
2856
2857static int snd_pcm_release(struct inode *inode, struct file *file)
2858{
877211f5
TI		 2859 struct snd_pcm *pcm;
2860 struct snd_pcm_substream *substream;
2861 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2862
2863 pcm_file = file->private_data;
2864 substream = pcm_file->substream;
7eaa943c
TI		 2865 if (snd_BUG_ON(!substream))
2866 return -ENXIO;
1da177e4 2867 pcm = substream->pcm;
534a427b
TI		 2868
2869 /* block until the device gets woken up as it may touch the hardware */
2870 snd_power_wait(pcm->card);
2871
1a60d4c5 2872 mutex_lock(&pcm->open_mutex);
3bf75f9b 2873 snd_pcm_release_substream(substream);
548a648b 2874 kfree(pcm_file);
1a60d4c5 2875 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2876 wake_up(&pcm->open_wait);
2877 module_put(pcm->card->module);
2878 snd_card_file_remove(pcm->card, file);
2879 return 0;
2880}
2881
f839cc1c
TI		 2882/* check and update PCM state; return 0 or a negative error
2883 * call this inside PCM lock
2884 */
2885static int do_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2886{
f839cc1c 2887 switch (substream->runtime->status->state) {
1da177e4 2888 case SNDRV_PCM_STATE_DRAINING:
f839cc1c
TI		 2889 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2890 return -EBADFD;
c0dbbdad 2891 fallthrough;
f839cc1c
TI		 2892 case SNDRV_PCM_STATE_RUNNING:
2893 return snd_pcm_update_hw_ptr(substream);
2894 case SNDRV_PCM_STATE_PREPARED:
2895 case SNDRV_PCM_STATE_PAUSED:
2896 return 0;
51840409 2897 case SNDRV_PCM_STATE_SUSPENDED:
f839cc1c
TI		 2898 return -ESTRPIPE;
2899 case SNDRV_PCM_STATE_XRUN:
2900 return -EPIPE;
1da177e4 2901 default:
f839cc1c 2902 return -EBADFD;
1da177e4 2903 }
f839cc1c 2904}
1da177e4 2905
9027c463 2906/* increase the appl_ptr; returns the processed frames or a negative error */
e0327a0f
TI		 2907static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
2908 snd_pcm_uframes_t frames,
2909 snd_pcm_sframes_t avail)
2910{
2911 struct snd_pcm_runtime *runtime = substream->runtime;
2912 snd_pcm_sframes_t appl_ptr;
9027c463 2913 int ret;
e0327a0f
TI		 2914
2915 if (avail <= 0)
2916 return 0;
2917 if (frames > (snd_pcm_uframes_t)avail)
2918 frames = avail;
2919 appl_ptr = runtime->control->appl_ptr + frames;
2920 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2921 appl_ptr -= runtime->boundary;
66e01a5c 2922 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
9027c463 2923 return ret < 0 ? ret : frames;
e0327a0f
TI		 2924}
2925
fb51f1cd 2926/* decrease the appl_ptr; returns the processed frames or zero for error */
e0327a0f
TI		 2927static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
2928 snd_pcm_uframes_t frames,
2929 snd_pcm_sframes_t avail)
2930{
2931 struct snd_pcm_runtime *runtime = substream->runtime;
2932 snd_pcm_sframes_t appl_ptr;
9027c463 2933 int ret;
e0327a0f
TI		 2934
2935 if (avail <= 0)
2936 return 0;
2937 if (frames > (snd_pcm_uframes_t)avail)
2938 frames = avail;
1da177e4
LT		 2939 appl_ptr = runtime->control->appl_ptr - frames;
2940 if (appl_ptr < 0)
2941 appl_ptr += runtime->boundary;
66e01a5c 2942 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
fb51f1cd
TI		 2943 /* NOTE: we return zero for errors because PulseAudio gets depressed
2944 * upon receiving an error from rewind ioctl and stops processing
2945 * any longer. Returning zero means that no rewind is done, so
2946 * it's not absolutely wrong to answer like that.
2947 */
2948 return ret < 0 ? 0 : frames;
e0327a0f
TI		 2949}
2950
763e5067
TI		 2951static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream,
2952 snd_pcm_uframes_t frames)
1da177e4 2953{
1da177e4 2954 snd_pcm_sframes_t ret;
1da177e4
LT		 2955
2956 if (frames == 0)
2957 return 0;
2958
2959 snd_pcm_stream_lock_irq(substream);
f839cc1c 2960 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2961 if (!ret)
2962 ret = rewind_appl_ptr(substream, frames,
763e5067 2963 snd_pcm_hw_avail(substream));
1da177e4
LT		 2964 snd_pcm_stream_unlock_irq(substream);
2965 return ret;
2966}
2967
763e5067
TI		 2968static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream,
2969 snd_pcm_uframes_t frames)
1da177e4 2970{
1da177e4 2971 snd_pcm_sframes_t ret;
1da177e4
LT		 2972
2973 if (frames == 0)
2974 return 0;
2975
2976 snd_pcm_stream_lock_irq(substream);
f839cc1c 2977 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2978 if (!ret)
2979 ret = forward_appl_ptr(substream, frames,
763e5067 2980 snd_pcm_avail(substream));
1da177e4
LT		 2981 snd_pcm_stream_unlock_irq(substream);
2982 return ret;
2983}
2984
877211f5 2985static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2986{
1da177e4
LT		 2987 int err;
2988
2989 snd_pcm_stream_lock_irq(substream);
f839cc1c 2990 err = do_pcm_hwsync(substream);
1da177e4
LT		 2991 snd_pcm_stream_unlock_irq(substream);
2992 return err;
2993}
2994
912e4c33
JM		 2995static int snd_pcm_delay(struct snd_pcm_substream *substream,
2996 snd_pcm_sframes_t *delay)
1da177e4 2997{
1da177e4
LT		 2998 int err;
2999 snd_pcm_sframes_t n = 0;
3000
3001 snd_pcm_stream_lock_irq(substream);
f839cc1c 3002 err = do_pcm_hwsync(substream);
c99c5a3b
TI		 3003 if (!err)
3004 n = snd_pcm_calc_delay(substream);
1da177e4 3005 snd_pcm_stream_unlock_irq(substream);
912e4c33
JM		 3006 if (!err)
3007 *delay = n;
3008 return err;
1da177e4
LT		 3009}
3010
877211f5
TI		 3011static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
3012 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 3013{
877211f5
TI		 3014 struct snd_pcm_runtime *runtime = substream->runtime;
3015 struct snd_pcm_sync_ptr sync_ptr;
3016 volatile struct snd_pcm_mmap_status *status;
3017 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 3018 int err;
3019
3020 memset(&sync_ptr, 0, sizeof(sync_ptr));
3021 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
3022 return -EFAULT;
877211f5 3023 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3024 return -EFAULT;
3025 status = runtime->status;
3026 control = runtime->control;
3027 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
3028 err = snd_pcm_hwsync(substream);
3029 if (err < 0)
3030 return err;
3031 }
3032 snd_pcm_stream_lock_irq(substream);
9027c463 3033 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
66e01a5c
TS		 3034 err = pcm_lib_apply_appl_ptr(substream,
3035 sync_ptr.c.control.appl_ptr);
9027c463
TI		 3036 if (err < 0) {
3037 snd_pcm_stream_unlock_irq(substream);
3038 return err;
3039 }
3040 } else {
1da177e4 3041 sync_ptr.c.control.appl_ptr = control->appl_ptr;
9027c463 3042 }
1da177e4
LT		 3043 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
3044 control->avail_min = sync_ptr.c.control.avail_min;
3045 else
3046 sync_ptr.c.control.avail_min = control->avail_min;
3047 sync_ptr.s.status.state = status->state;
3048 sync_ptr.s.status.hw_ptr = status->hw_ptr;
3049 sync_ptr.s.status.tstamp = status->tstamp;
3050 sync_ptr.s.status.suspended_state = status->suspended_state;
f853dcaa 3051 sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
1da177e4
LT		 3052 snd_pcm_stream_unlock_irq(substream);
3053 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
3054 return -EFAULT;
3055 return 0;
3056}
b751eef1 3057
09d94175 3058struct snd_pcm_mmap_status32 {
cb639a42 3059 snd_pcm_state_t state;
09d94175
AB		 3060 s32 pad1;
3061 u32 hw_ptr;
80fe7430
AB		 3062 s32 tstamp_sec;
3063 s32 tstamp_nsec;
cb639a42 3064 snd_pcm_state_t suspended_state;
80fe7430
AB		 3065 s32 audio_tstamp_sec;
3066 s32 audio_tstamp_nsec;
09d94175
AB		 3067} __attribute__((packed));
3068
3069struct snd_pcm_mmap_control32 {
3070 u32 appl_ptr;
3071 u32 avail_min;
3072};
3073
3074struct snd_pcm_sync_ptr32 {
3075 u32 flags;
3076 union {
3077 struct snd_pcm_mmap_status32 status;
3078 unsigned char reserved[64];
3079 } s;
3080 union {
3081 struct snd_pcm_mmap_control32 control;
3082 unsigned char reserved[64];
3083 } c;
3084} __attribute__((packed));
3085
3086/* recalcuate the boundary within 32bit */
3087static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
3088{
3089 snd_pcm_uframes_t boundary;
3090
3091 if (! runtime->buffer_size)
3092 return 0;
3093 boundary = runtime->buffer_size;
3094 while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
3095 boundary *= 2;
3096 return boundary;
3097}
3098
3099static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
3100 struct snd_pcm_sync_ptr32 __user *src)
3101{
3102 struct snd_pcm_runtime *runtime = substream->runtime;
3103 volatile struct snd_pcm_mmap_status *status;
3104 volatile struct snd_pcm_mmap_control *control;
3105 u32 sflags;
3106 struct snd_pcm_mmap_control scontrol;
3107 struct snd_pcm_mmap_status sstatus;
3108 snd_pcm_uframes_t boundary;
3109 int err;
3110
3111 if (snd_BUG_ON(!runtime))
3112 return -EINVAL;
3113
3114 if (get_user(sflags, &src->flags) ||
3115 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
3116 get_user(scontrol.avail_min, &src->c.control.avail_min))
3117 return -EFAULT;
3118 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
3119 err = snd_pcm_hwsync(substream);
3120 if (err < 0)
3121 return err;
3122 }
3123 status = runtime->status;
3124 control = runtime->control;
3125 boundary = recalculate_boundary(runtime);
3126 if (! boundary)
3127 boundary = 0x7fffffff;
3128 snd_pcm_stream_lock_irq(substream);
3129 /* FIXME: we should consider the boundary for the sync from app */
2e283256
AY		 3130 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL)) {
3131 err = pcm_lib_apply_appl_ptr(substream,
3132 scontrol.appl_ptr);
3133 if (err < 0) {
3134 snd_pcm_stream_unlock_irq(substream);
3135 return err;
3136 }
3137 } else
09d94175
AB		 3138 scontrol.appl_ptr = control->appl_ptr % boundary;
3139 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
3140 control->avail_min = scontrol.avail_min;
3141 else
3142 scontrol.avail_min = control->avail_min;
3143 sstatus.state = status->state;
3144 sstatus.hw_ptr = status->hw_ptr % boundary;
3145 sstatus.tstamp = status->tstamp;
3146 sstatus.suspended_state = status->suspended_state;
3147 sstatus.audio_tstamp = status->audio_tstamp;
3148 snd_pcm_stream_unlock_irq(substream);
3149 if (put_user(sstatus.state, &src->s.status.state) ||
3150 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
80fe7430
AB		 3151 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp_sec) ||
3152 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp_nsec) ||
09d94175 3153 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
80fe7430
AB		 3154 put_user(sstatus.audio_tstamp.tv_sec, &src->s.status.audio_tstamp_sec) ||
3155 put_user(sstatus.audio_tstamp.tv_nsec, &src->s.status.audio_tstamp_nsec) ||
09d94175
AB		 3156 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
3157 put_user(scontrol.avail_min, &src->c.control.avail_min))
3158 return -EFAULT;
3159
3160 return 0;
3161}
80fe7430 3162#define __SNDRV_PCM_IOCTL_SYNC_PTR32 _IOWR('A', 0x23, struct snd_pcm_sync_ptr32)
09d94175 3163
b751eef1
JK		 3164static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
3165{
3166 struct snd_pcm_runtime *runtime = substream->runtime;
3167 int arg;
3168
3169 if (get_user(arg, _arg))
3170 return -EFAULT;
3171 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
3172 return -EINVAL;
2408c219 3173 runtime->tstamp_type = arg;
b751eef1
JK		 3174 return 0;
3175}
67616fed
TI		 3176
3177static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream,
3178 struct snd_xferi __user *_xferi)
3179{
3180 struct snd_xferi xferi;
3181 struct snd_pcm_runtime *runtime = substream->runtime;
3182 snd_pcm_sframes_t result;
3183
3184 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3185 return -EBADFD;
3186 if (put_user(0, &_xferi->result))
3187 return -EFAULT;
3188 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
3189 return -EFAULT;
3190 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3191 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
3192 else
3193 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
ebe6976d
AV		 3194 if (put_user(result, &_xferi->result))
3195 return -EFAULT;
67616fed
TI		 3196 return result < 0 ? result : 0;
3197}
3198
3199static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
3200 struct snd_xfern __user *_xfern)
3201{
3202 struct snd_xfern xfern;
3203 struct snd_pcm_runtime *runtime = substream->runtime;
3204 void *bufs;
3205 snd_pcm_sframes_t result;
3206
3207 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3208 return -EBADFD;
3209 if (runtime->channels > 128)
3210 return -EINVAL;
3211 if (put_user(0, &_xfern->result))
3212 return -EFAULT;
3213 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
3214 return -EFAULT;
3215
3216 bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
3217 if (IS_ERR(bufs))
3218 return PTR_ERR(bufs);
3219 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3220 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
3221 else
3222 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
3223 kfree(bufs);
ebe6976d
AV		 3224 if (put_user(result, &_xfern->result))
3225 return -EFAULT;
67616fed
TI		 3226 return result < 0 ? result : 0;
3227}
3228
3229static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream,
3230 snd_pcm_uframes_t __user *_frames)
3231{
3232 snd_pcm_uframes_t frames;
3233 snd_pcm_sframes_t result;
3234
3235 if (get_user(frames, _frames))
3236 return -EFAULT;
3237 if (put_user(0, _frames))
3238 return -EFAULT;
763e5067 3239 result = snd_pcm_rewind(substream, frames);
ebe6976d
AV		 3240 if (put_user(result, _frames))
3241 return -EFAULT;
67616fed
TI		 3242 return result < 0 ? result : 0;
3243}
3244
3245static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream,
3246 snd_pcm_uframes_t __user *_frames)
3247{
3248 snd_pcm_uframes_t frames;
3249 snd_pcm_sframes_t result;
3250
3251 if (get_user(frames, _frames))
3252 return -EFAULT;
3253 if (put_user(0, _frames))
3254 return -EFAULT;
763e5067 3255 result = snd_pcm_forward(substream, frames);
ebe6976d
AV		 3256 if (put_user(result, _frames))
3257 return -EFAULT;
67616fed
TI		 3258 return result < 0 ? result : 0;
3259}
3260
3261static int snd_pcm_common_ioctl(struct file *file,
0df63e44 3262 struct snd_pcm_substream *substream,
1da177e4
LT		 3263 unsigned int cmd, void __user *arg)
3264{
4b671f57 3265 struct snd_pcm_file *pcm_file = file->private_data;
7d8e8292
TI		 3266 int res;
3267
67616fed
TI		 3268 if (PCM_RUNTIME_CHECK(substream))
3269 return -ENXIO;
3270
b6cc78da 3271 res = snd_power_wait(substream->pcm->card);
7d8e8292
TI		 3272 if (res < 0)
3273 return res;
4b671f57 3274
1da177e4
LT		 3275 switch (cmd) {
3276 case SNDRV_PCM_IOCTL_PVERSION:
3277 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
3278 case SNDRV_PCM_IOCTL_INFO:
3279 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 3280 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
3281 return 0;
b751eef1
JK		 3282 case SNDRV_PCM_IOCTL_TTSTAMP:
3283 return snd_pcm_tstamp(substream, arg);
4b671f57
TI		 3284 case SNDRV_PCM_IOCTL_USER_PVERSION:
3285 if (get_user(pcm_file->user_pversion,
3286 (unsigned int __user *)arg))
3287 return -EFAULT;
3288 return 0;
1da177e4
LT		 3289 case SNDRV_PCM_IOCTL_HW_REFINE:
3290 return snd_pcm_hw_refine_user(substream, arg);
3291 case SNDRV_PCM_IOCTL_HW_PARAMS:
3292 return snd_pcm_hw_params_user(substream, arg);
3293 case SNDRV_PCM_IOCTL_HW_FREE:
3294 return snd_pcm_hw_free(substream);
3295 case SNDRV_PCM_IOCTL_SW_PARAMS:
3296 return snd_pcm_sw_params_user(substream, arg);
3ddee7f8
BW		 3297 case SNDRV_PCM_IOCTL_STATUS32:
3298 return snd_pcm_status_user32(substream, arg, false);
3299 case SNDRV_PCM_IOCTL_STATUS_EXT32:
3300 return snd_pcm_status_user32(substream, arg, true);
3301 case SNDRV_PCM_IOCTL_STATUS64:
3302 return snd_pcm_status_user64(substream, arg, false);
3303 case SNDRV_PCM_IOCTL_STATUS_EXT64:
3304 return snd_pcm_status_user64(substream, arg, true);
1da177e4
LT		 3305 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
3306 return snd_pcm_channel_info_user(substream, arg);
3307 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 3308 return snd_pcm_prepare(substream, file);
1da177e4
LT		 3309 case SNDRV_PCM_IOCTL_RESET:
3310 return snd_pcm_reset(substream);
3311 case SNDRV_PCM_IOCTL_START:
c2c86a97 3312 return snd_pcm_start_lock_irq(substream);
1da177e4
LT		 3313 case SNDRV_PCM_IOCTL_LINK:
3314 return snd_pcm_link(substream, (int)(unsigned long) arg);
3315 case SNDRV_PCM_IOCTL_UNLINK:
3316 return snd_pcm_unlink(substream);
3317 case SNDRV_PCM_IOCTL_RESUME:
3318 return snd_pcm_resume(substream);
3319 case SNDRV_PCM_IOCTL_XRUN:
3320 return snd_pcm_xrun(substream);
3321 case SNDRV_PCM_IOCTL_HWSYNC:
3322 return snd_pcm_hwsync(substream);
3323 case SNDRV_PCM_IOCTL_DELAY:
c2c86a97 3324 {
912e4c33 3325 snd_pcm_sframes_t delay;
c2c86a97 3326 snd_pcm_sframes_t __user *res = arg;
912e4c33 3327 int err;
c2c86a97 3328
912e4c33
JM		 3329 err = snd_pcm_delay(substream, &delay);
3330 if (err)
3331 return err;
c2c86a97
TI		 3332 if (put_user(delay, res))
3333 return -EFAULT;
3334 return 0;
3335 }
80fe7430
AB		 3336 case __SNDRV_PCM_IOCTL_SYNC_PTR32:
3337 return snd_pcm_ioctl_sync_ptr_compat(substream, arg);
3338 case __SNDRV_PCM_IOCTL_SYNC_PTR64:
1da177e4 3339 return snd_pcm_sync_ptr(substream, arg);
59d48582 3340#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3341 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
3342 return snd_pcm_hw_refine_old_user(substream, arg);
3343 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
3344 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 3345#endif
1da177e4 3346 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 3347 return snd_pcm_drain(substream, file);
1da177e4
LT		 3348 case SNDRV_PCM_IOCTL_DROP:
3349 return snd_pcm_drop(substream);
e661d0dd 3350 case SNDRV_PCM_IOCTL_PAUSE:
cb639a42 3351 return snd_pcm_pause_lock_irq(substream, (unsigned long)arg);
1da177e4 3352 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
1da177e4 3353 case SNDRV_PCM_IOCTL_READI_FRAMES:
67616fed
TI		 3354 return snd_pcm_xferi_frames_ioctl(substream, arg);
3355 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
1da177e4 3356 case SNDRV_PCM_IOCTL_READN_FRAMES:
67616fed 3357 return snd_pcm_xfern_frames_ioctl(substream, arg);
1da177e4 3358 case SNDRV_PCM_IOCTL_REWIND:
67616fed 3359 return snd_pcm_rewind_ioctl(substream, arg);
1da177e4 3360 case SNDRV_PCM_IOCTL_FORWARD:
67616fed 3361 return snd_pcm_forward_ioctl(substream, arg);
1da177e4 3362 }
67616fed
TI		 3363 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
3364 return -ENOTTY;
1da177e4
LT		 3365}
3366
67616fed
TI		 3367static long snd_pcm_ioctl(struct file *file, unsigned int cmd,
3368 unsigned long arg)
1da177e4 3369{
877211f5 3370 struct snd_pcm_file *pcm_file;
1da177e4
LT		 3371
3372 pcm_file = file->private_data;
3373
3374 if (((cmd >> 8) & 0xff) != 'A')
3375 return -ENOTTY;
3376
67616fed
TI		 3377 return snd_pcm_common_ioctl(file, pcm_file->substream, cmd,
3378 (void __user *)arg);
1da177e4
LT		 3379}
3380
c2c86a97
TI		 3381/**
3382 * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space
3383 * @substream: PCM substream
3384 * @cmd: IOCTL cmd
3385 * @arg: IOCTL argument
3386 *
3387 * The function is provided primarily for OSS layer and USB gadget drivers,
3388 * and it allows only the limited set of ioctls (hw_params, sw_params,
3389 * prepare, start, drain, drop, forward).
3390 */
bf1bbb5a
TI		 3391int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
3392 unsigned int cmd, void *arg)
1da177e4 3393{
c2c86a97
TI		 3394 snd_pcm_uframes_t *frames = arg;
3395 snd_pcm_sframes_t result;
1da177e4 3396
c2c86a97
TI		 3397 switch (cmd) {
3398 case SNDRV_PCM_IOCTL_FORWARD:
3399 {
3400 /* provided only for OSS; capture-only and no value returned */
3401 if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
3402 return -EINVAL;
763e5067 3403 result = snd_pcm_forward(substream, *frames);
c2c86a97
TI		 3404 return result < 0 ? result : 0;
3405 }
3406 case SNDRV_PCM_IOCTL_HW_PARAMS:
3407 return snd_pcm_hw_params(substream, arg);
3408 case SNDRV_PCM_IOCTL_SW_PARAMS:
3409 return snd_pcm_sw_params(substream, arg);
3410 case SNDRV_PCM_IOCTL_PREPARE:
3411 return snd_pcm_prepare(substream, NULL);
3412 case SNDRV_PCM_IOCTL_START:
3413 return snd_pcm_start_lock_irq(substream);
3414 case SNDRV_PCM_IOCTL_DRAIN:
7d8e8292 3415 return snd_pcm_drain(substream, NULL);
c2c86a97
TI		 3416 case SNDRV_PCM_IOCTL_DROP:
3417 return snd_pcm_drop(substream);
3418 case SNDRV_PCM_IOCTL_DELAY:
912e4c33 3419 return snd_pcm_delay(substream, frames);
1da177e4 3420 default:
c2c86a97 3421 return -EINVAL;
1da177e4
LT		 3422 }
3423}
e88e8ae6
TI		 3424EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3425
877211f5
TI		 3426static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3427 loff_t * offset)
1da177e4 3428{
877211f5
TI		 3429 struct snd_pcm_file *pcm_file;
3430 struct snd_pcm_substream *substream;
3431 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3432 snd_pcm_sframes_t result;
3433
3434 pcm_file = file->private_data;
3435 substream = pcm_file->substream;
7eaa943c
TI		 3436 if (PCM_RUNTIME_CHECK(substream))
3437 return -ENXIO;
1da177e4
LT		 3438 runtime = substream->runtime;
3439 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3440 return -EBADFD;
3441 if (!frame_aligned(runtime, count))
3442 return -EINVAL;
3443 count = bytes_to_frames(runtime, count);
3444 result = snd_pcm_lib_read(substream, buf, count);
3445 if (result > 0)
3446 result = frames_to_bytes(runtime, result);
3447 return result;
3448}
3449
877211f5
TI		 3450static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3451 size_t count, loff_t * offset)
1da177e4 3452{
877211f5
TI		 3453 struct snd_pcm_file *pcm_file;
3454 struct snd_pcm_substream *substream;
3455 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3456 snd_pcm_sframes_t result;
3457
3458 pcm_file = file->private_data;
3459 substream = pcm_file->substream;
7eaa943c
TI		 3460 if (PCM_RUNTIME_CHECK(substream))
3461 return -ENXIO;
1da177e4 3462 runtime = substream->runtime;
7eaa943c
TI		 3463 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3464 return -EBADFD;
3465 if (!frame_aligned(runtime, count))
3466 return -EINVAL;
1da177e4
LT		 3467 count = bytes_to_frames(runtime, count);
3468 result = snd_pcm_lib_write(substream, buf, count);
3469 if (result > 0)
3470 result = frames_to_bytes(runtime, result);
1da177e4
LT		 3471 return result;
3472}
3473
1c65d986 3474static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
1da177e4 3475{
877211f5
TI		 3476 struct snd_pcm_file *pcm_file;
3477 struct snd_pcm_substream *substream;
3478 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3479 snd_pcm_sframes_t result;
3480 unsigned long i;
3481 void __user **bufs;
3482 snd_pcm_uframes_t frames;
3483
ee0b3e67 3484 pcm_file = iocb->ki_filp->private_data;
1da177e4 3485 substream = pcm_file->substream;
7eaa943c
TI		 3486 if (PCM_RUNTIME_CHECK(substream))
3487 return -ENXIO;
1da177e4
LT		 3488 runtime = substream->runtime;
3489 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3490 return -EBADFD;
1c65d986
AV		 3491 if (!iter_is_iovec(to))
3492 return -EINVAL;
3493 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
1da177e4 3494 return -EINVAL;
1c65d986 3495 if (!frame_aligned(runtime, to->iov->iov_len))
1da177e4 3496 return -EINVAL;
1c65d986 3497 frames = bytes_to_samples(runtime, to->iov->iov_len);
6da2ec56 3498 bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL);
1da177e4
LT		 3499 if (bufs == NULL)
3500 return -ENOMEM;
1c65d986
AV		 3501 for (i = 0; i < to->nr_segs; ++i)
3502 bufs[i] = to->iov[i].iov_base;
1da177e4
LT		 3503 result = snd_pcm_lib_readv(substream, bufs, frames);
3504 if (result > 0)
3505 result = frames_to_bytes(runtime, result);
3506 kfree(bufs);
3507 return result;
3508}
3509
1c65d986 3510static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
1da177e4 3511{
877211f5
TI		 3512 struct snd_pcm_file *pcm_file;
3513 struct snd_pcm_substream *substream;
3514 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3515 snd_pcm_sframes_t result;
3516 unsigned long i;
3517 void __user **bufs;
3518 snd_pcm_uframes_t frames;
3519
ee0b3e67 3520 pcm_file = iocb->ki_filp->private_data;
1da177e4 3521 substream = pcm_file->substream;
7eaa943c
TI		 3522 if (PCM_RUNTIME_CHECK(substream))
3523 return -ENXIO;
1da177e4 3524 runtime = substream->runtime;
7eaa943c
TI		 3525 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3526 return -EBADFD;
1c65d986
AV		 3527 if (!iter_is_iovec(from))
3528 return -EINVAL;
3529 if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
3530 !frame_aligned(runtime, from->iov->iov_len))
7eaa943c 3531 return -EINVAL;
1c65d986 3532 frames = bytes_to_samples(runtime, from->iov->iov_len);
6da2ec56 3533 bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL);
1da177e4
LT		 3534 if (bufs == NULL)
3535 return -ENOMEM;
1c65d986
AV		 3536 for (i = 0; i < from->nr_segs; ++i)
3537 bufs[i] = from->iov[i].iov_base;
1da177e4
LT		 3538 result = snd_pcm_lib_writev(substream, bufs, frames);
3539 if (result > 0)
3540 result = frames_to_bytes(runtime, result);
3541 kfree(bufs);
1da177e4
LT		 3542 return result;
3543}
3544
6448fcba 3545static __poll_t snd_pcm_poll(struct file *file, poll_table *wait)
1da177e4 3546{
877211f5
TI		 3547 struct snd_pcm_file *pcm_file;
3548 struct snd_pcm_substream *substream;
3549 struct snd_pcm_runtime *runtime;
6448fcba 3550 __poll_t mask, ok;
1da177e4
LT		 3551 snd_pcm_uframes_t avail;
3552
3553 pcm_file = file->private_data;
3554
3555 substream = pcm_file->substream;
6448fcba
TI		 3556 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3557 ok = EPOLLOUT | EPOLLWRNORM;
3558 else
3559 ok = EPOLLIN | EPOLLRDNORM;
7eaa943c 3560 if (PCM_RUNTIME_CHECK(substream))
6448fcba 3561 return ok | EPOLLERR;
1da177e4 3562
1da177e4 3563 runtime = substream->runtime;
1da177e4
LT		 3564 poll_wait(file, &runtime->sleep, wait);
3565
6448fcba 3566 mask = 0;
1da177e4 3567 snd_pcm_stream_lock_irq(substream);
6448fcba 3568 avail = snd_pcm_avail(substream);
1da177e4
LT		 3569 switch (runtime->status->state) {
3570 case SNDRV_PCM_STATE_RUNNING:
3571 case SNDRV_PCM_STATE_PREPARED:
3572 case SNDRV_PCM_STATE_PAUSED:
6448fcba
TI		 3573 if (avail >= runtime->control->avail_min)
3574 mask = ok;
1da177e4
LT		 3575 break;
3576 case SNDRV_PCM_STATE_DRAINING:
6448fcba
TI		 3577 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
3578 mask = ok;
3579 if (!avail)
3580 mask |= EPOLLERR;
1da177e4 3581 }
6448fcba 3582 break;
1da177e4 3583 default:
6448fcba 3584 mask = ok | EPOLLERR;
1da177e4
LT		 3585 break;
3586 }
3587 snd_pcm_stream_unlock_irq(substream);
3588 return mask;
3589}
3590
3591/*
3592 * mmap support
3593 */
3594
3595/*
3596 * Only on coherent architectures, we can mmap the status and the control records
3597 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3598 */
3599#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3600/*
3601 * mmap status record
3602 */
41412fe9 3603static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf)
1da177e4 3604{
11bac800 3605 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3606 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3607
3608 if (substream == NULL)
3ad5afcd 3609 return VM_FAULT_SIGBUS;
1da177e4 3610 runtime = substream->runtime;
3ad5afcd
NP		 3611 vmf->page = virt_to_page(runtime->status);
3612 get_page(vmf->page);
3613 return 0;
1da177e4
LT		 3614}
3615
f0f37e2f 3616static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3617{
3ad5afcd 3618 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3619};
3620
877211f5 3621static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3622 struct vm_area_struct *area)
3623{
1da177e4
LT		 3624 long size;
3625 if (!(area->vm_flags & VM_READ))
3626 return -EINVAL;
1da177e4 3627 size = area->vm_end - area->vm_start;
877211f5 3628 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3629 return -EINVAL;
3630 area->vm_ops = &snd_pcm_vm_ops_status;
3631 area->vm_private_data = substream;
314e51b9 3632 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3633 return 0;
3634}
3635
3636/*
3637 * mmap control record
3638 */
41412fe9 3639static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf)
1da177e4 3640{
11bac800 3641 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3642 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3643
3644 if (substream == NULL)
3ad5afcd 3645 return VM_FAULT_SIGBUS;
1da177e4 3646 runtime = substream->runtime;
3ad5afcd
NP		 3647 vmf->page = virt_to_page(runtime->control);
3648 get_page(vmf->page);
3649 return 0;
1da177e4
LT		 3650}
3651
f0f37e2f 3652static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3653{
3ad5afcd 3654 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3655};
3656
877211f5 3657static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3658 struct vm_area_struct *area)
3659{
1da177e4
LT		 3660 long size;
3661 if (!(area->vm_flags & VM_READ))
3662 return -EINVAL;
1da177e4 3663 size = area->vm_end - area->vm_start;
877211f5 3664 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3665 return -EINVAL;
3666 area->vm_ops = &snd_pcm_vm_ops_control;
3667 area->vm_private_data = substream;
314e51b9 3668 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3669 return 0;
3670}
42f94597
TI		 3671
3672static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
3673{
81be1093
TI		 3674 /* If drivers require the explicit sync (typically for non-coherent
3675 * pages), we have to disable the mmap of status and control data
3676 * to enforce the control via SYNC_PTR ioctl.
3677 */
3678 if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_EXPLICIT_SYNC)
3679 return false;
b602aa8e
TI		 3680 /* See pcm_control_mmap_allowed() below.
3681 * Since older alsa-lib requires both status and control mmaps to be
3682 * coupled, we have to disable the status mmap for old alsa-lib, too.
3683 */
3684 if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) &&
3685 (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR))
3686 return false;
3687 return true;
3688}
3689
3690static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
3691{
3692 if (pcm_file->no_compat_mmap)
3693 return false;
81be1093
TI		 3694 /* see above */
3695 if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_EXPLICIT_SYNC)
3696 return false;
b602aa8e 3697 /* Disallow the control mmap when SYNC_APPLPTR flag is set;
42f94597
TI		 3698 * it enforces the user-space to fall back to snd_pcm_sync_ptr(),
3699 * thus it effectively assures the manual update of appl_ptr.
42f94597
TI		 3700 */
3701 if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)
3702 return false;
3703 return true;
3704}
3705
1da177e4
LT		 3706#else /* ! coherent mmap */
3707/*
3708 * don't support mmap for status and control records.
3709 */
42f94597 3710#define pcm_status_mmap_allowed(pcm_file) false
b602aa8e 3711#define pcm_control_mmap_allowed(pcm_file) false
42f94597 3712
877211f5 3713static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3714 struct vm_area_struct *area)
3715{
3716 return -ENXIO;
3717}
877211f5 3718static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3719 struct vm_area_struct *area)
3720{
3721 return -ENXIO;
3722}
3723#endif /* coherent mmap */
3724
3725/*
3ad5afcd 3726 * fault callback for mmapping a RAM page
1da177e4 3727 */
41412fe9 3728static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf)
1da177e4 3729{
11bac800 3730 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3731 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3732 unsigned long offset;
3733 struct page * page;
1da177e4
LT		 3734 size_t dma_bytes;
3735
3736 if (substream == NULL)
3ad5afcd 3737 return VM_FAULT_SIGBUS;
1da177e4 3738 runtime = substream->runtime;
3ad5afcd 3739 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3740 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3741 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3742 return VM_FAULT_SIGBUS;
9eb4a067 3743 if (substream->ops->page)
1da177e4 3744 page = substream->ops->page(substream, offset);
d3715889
TI		 3745 else if (!snd_pcm_get_dma_buf(substream))
3746 page = virt_to_page(runtime->dma_area + offset);
9eb4a067 3747 else
37af81c5 3748 page = snd_sgbuf_get_page(snd_pcm_get_dma_buf(substream), offset);
9eb4a067
TI		 3749 if (!page)
3750 return VM_FAULT_SIGBUS;
b5810039 3751 get_page(page);
3ad5afcd
NP		 3752 vmf->page = page;
3753 return 0;
1da177e4
LT		 3754}
3755
657b1989
TI		 3756static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3757 .open = snd_pcm_mmap_data_open,
3758 .close = snd_pcm_mmap_data_close,
3759};
3760
3761static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3762 .open = snd_pcm_mmap_data_open,
3763 .close = snd_pcm_mmap_data_close,
3ad5afcd 3764 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3765};
3766
3767/*
3768 * mmap the DMA buffer on RAM
3769 */
30b771cf
TI		 3770
3771/**
3772 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3773 * @substream: PCM substream
3774 * @area: VMA
3775 *
3776 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3777 * this function is invoked implicitly.
3778 */
18a2b962
TI		 3779int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3780 struct vm_area_struct *area)
1da177e4 3781{
314e51b9 3782 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
a202bd1a
TI		 3783 if (!substream->ops->page &&
3784 !snd_dma_buffer_mmap(snd_pcm_get_dma_buf(substream), area))
3785 return 0;
657b1989
TI		 3786 /* mmap with fault handler */
3787 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3788 return 0;
3789}
18a2b962 3790EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3791
3792/*
3793 * mmap the DMA buffer on I/O memory area
3794 */
3795#if SNDRV_PCM_INFO_MMAP_IOMEM
30b771cf
TI		 3796/**
3797 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3798 * @substream: PCM substream
3799 * @area: VMA
3800 *
3801 * When your hardware uses the iomapped pages as the hardware buffer and
3802 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3803 * is supposed to work only on limited architectures.
3804 */
877211f5
TI		 3805int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3806 struct vm_area_struct *area)
1da177e4 3807{
3c7f6919 3808 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 3809
1da177e4 3810 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
0fe09a45 3811 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
1da177e4 3812}
e88e8ae6 3813EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3814#endif /* SNDRV_PCM_INFO_MMAP */
3815
3816/*
3817 * mmap DMA buffer
3818 */
877211f5 3819int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3820 struct vm_area_struct *area)
3821{
877211f5 3822 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3823 long size;
3824 unsigned long offset;
3825 size_t dma_bytes;
657b1989 3826 int err;
1da177e4
LT		 3827
3828 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3829 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3830 return -EINVAL;
3831 } else {
3832 if (!(area->vm_flags & VM_READ))
3833 return -EINVAL;
3834 }
3835 runtime = substream->runtime;
1da177e4
LT		 3836 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3837 return -EBADFD;
3838 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3839 return -ENXIO;
3840 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3841 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3842 return -EINVAL;
3843 size = area->vm_end - area->vm_start;
3844 offset = area->vm_pgoff << PAGE_SHIFT;
3845 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3846 if ((size_t)size > dma_bytes)
3847 return -EINVAL;
3848 if (offset > dma_bytes - size)
3849 return -EINVAL;
3850
657b1989
TI		 3851 area->vm_ops = &snd_pcm_vm_ops_data;
3852 area->vm_private_data = substream;
1da177e4 3853 if (substream->ops->mmap)
657b1989 3854 err = substream->ops->mmap(substream, area);
1da177e4 3855 else
18a2b962 3856 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3857 if (!err)
3858 atomic_inc(&substream->mmap_count);
3859 return err;
1da177e4 3860}
e88e8ae6
TI		 3861EXPORT_SYMBOL(snd_pcm_mmap_data);
3862
1da177e4
LT		 3863static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3864{
877211f5
TI		 3865 struct snd_pcm_file * pcm_file;
3866 struct snd_pcm_substream *substream;
1da177e4
LT		 3867 unsigned long offset;
3868
3869 pcm_file = file->private_data;
3870 substream = pcm_file->substream;
7eaa943c
TI		 3871 if (PCM_RUNTIME_CHECK(substream))
3872 return -ENXIO;
1da177e4
LT		 3873
3874 offset = area->vm_pgoff << PAGE_SHIFT;
3875 switch (offset) {
80fe7430
AB		 3876 case SNDRV_PCM_MMAP_OFFSET_STATUS_OLD:
3877 if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT))
3878 return -ENXIO;
c0dbbdad 3879 fallthrough;
80fe7430 3880 case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW:
42f94597 3881 if (!pcm_status_mmap_allowed(pcm_file))
1da177e4
LT		 3882 return -ENXIO;
3883 return snd_pcm_mmap_status(substream, file, area);
80fe7430
AB		 3884 case SNDRV_PCM_MMAP_OFFSET_CONTROL_OLD:
3885 if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT))
3886 return -ENXIO;
c0dbbdad 3887 fallthrough;
80fe7430 3888 case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW:
b602aa8e 3889 if (!pcm_control_mmap_allowed(pcm_file))
1da177e4
LT		 3890 return -ENXIO;
3891 return snd_pcm_mmap_control(substream, file, area);
3892 default:
3893 return snd_pcm_mmap_data(substream, file, area);
3894 }
3895 return 0;
3896}
3897
3898static int snd_pcm_fasync(int fd, struct file * file, int on)
3899{
877211f5
TI		 3900 struct snd_pcm_file * pcm_file;
3901 struct snd_pcm_substream *substream;
3902 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3903
3904 pcm_file = file->private_data;
3905 substream = pcm_file->substream;
7eaa943c 3906 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3907 return -ENXIO;
1da177e4 3908 runtime = substream->runtime;
d05468b7 3909 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3910}
3911
3912/*
3913 * ioctl32 compat
3914 */
3915#ifdef CONFIG_COMPAT
3916#include "pcm_compat.c"
3917#else
3918#define snd_pcm_ioctl_compat NULL
3919#endif
3920
3921/*
3922 * To be removed helpers to keep binary compatibility
3923 */
3924
59d48582 3925#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3926#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3927#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3928
877211f5
TI		 3929static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3930 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3931{
3932 unsigned int i;
3933
3934 memset(params, 0, sizeof(*params));
3935 params->flags = oparams->flags;
3936 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3937 params->masks[i].bits[0] = oparams->masks[i];
3938 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3939 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3940 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3941 params->info = oparams->info;
3942 params->msbits = oparams->msbits;
3943 params->rate_num = oparams->rate_num;
3944 params->rate_den = oparams->rate_den;
3945 params->fifo_size = oparams->fifo_size;
3946}
3947
877211f5
TI		 3948static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3949 struct snd_pcm_hw_params *params)
1da177e4
LT		 3950{
3951 unsigned int i;
3952
3953 memset(oparams, 0, sizeof(*oparams));
3954 oparams->flags = params->flags;
3955 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3956 oparams->masks[i] = params->masks[i].bits[0];
3957 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3958 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3959 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3960 oparams->info = params->info;
3961 oparams->msbits = params->msbits;
3962 oparams->rate_num = params->rate_num;
3963 oparams->rate_den = params->rate_den;
3964 oparams->fifo_size = params->fifo_size;
3965}
3966
877211f5
TI		 3967static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3968 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3969{
877211f5
TI		 3970 struct snd_pcm_hw_params *params;
3971 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3972 int err;
3973
3974 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3975 if (!params)
3976 return -ENOMEM;
1da177e4 3977
ef44a1ec
LZ		 3978 oparams = memdup_user(_oparams, sizeof(*oparams));
3979 if (IS_ERR(oparams)) {
3980 err = PTR_ERR(oparams);
1da177e4
LT		 3981 goto out;
3982 }
3983 snd_pcm_hw_convert_from_old_params(params, oparams);
3984 err = snd_pcm_hw_refine(substream, params);
f74ae15f
TS		 3985 if (err < 0)
3986 goto out_old;
ef44a1ec 3987
f74ae15f
TS		 3988 err = fixup_unreferenced_params(substream, params);
3989 if (err < 0)
3990 goto out_old;
ef44a1ec 3991
f74ae15f
TS		 3992 snd_pcm_hw_convert_to_old_params(oparams, params);
3993 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3994 err = -EFAULT;
3995out_old:
ef44a1ec 3996 kfree(oparams);
1da177e4
LT		 3997out:
3998 kfree(params);
1da177e4
LT		 3999 return err;
4000}
4001
877211f5
TI		 4002static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
4003 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 4004{
877211f5
TI		 4005 struct snd_pcm_hw_params *params;
4006 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 4007 int err;
4008
4009 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 4010 if (!params)
4011 return -ENOMEM;
4012
4013 oparams = memdup_user(_oparams, sizeof(*oparams));
4014 if (IS_ERR(oparams)) {
4015 err = PTR_ERR(oparams);
1da177e4
LT		 4016 goto out;
4017 }
f74ae15f 4018
1da177e4
LT		 4019 snd_pcm_hw_convert_from_old_params(params, oparams);
4020 err = snd_pcm_hw_params(substream, params);
f74ae15f
TS		 4021 if (err < 0)
4022 goto out_old;
ef44a1ec 4023
f74ae15f
TS		 4024 snd_pcm_hw_convert_to_old_params(oparams, params);
4025 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
4026 err = -EFAULT;
4027out_old:
ef44a1ec 4028 kfree(oparams);
1da177e4
LT		 4029out:
4030 kfree(params);
1da177e4
LT		 4031 return err;
4032}
59d48582 4033#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 4034
7003609b 4035#ifndef CONFIG_MMU
55c63bd2
DG		 4036static unsigned long snd_pcm_get_unmapped_area(struct file *file,
4037 unsigned long addr,
4038 unsigned long len,
4039 unsigned long pgoff,
4040 unsigned long flags)
4041{
4042 struct snd_pcm_file *pcm_file = file->private_data;
4043 struct snd_pcm_substream *substream = pcm_file->substream;
4044 struct snd_pcm_runtime *runtime = substream->runtime;
4045 unsigned long offset = pgoff << PAGE_SHIFT;
4046
4047 switch (offset) {
80fe7430 4048 case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW:
55c63bd2 4049 return (unsigned long)runtime->status;
80fe7430 4050 case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW:
55c63bd2
DG		 4051 return (unsigned long)runtime->control;
4052 default:
4053 return (unsigned long)runtime->dma_area + offset;
4054 }
7003609b
CC		 4055}
4056#else
55c63bd2 4057# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 4058#endif
4059
1da177e4
LT		 4060/*
4061 * Register section
4062 */
4063
9c2e08c5 4064const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 4065 {
2af677fc
CL		 4066 .owner = THIS_MODULE,
4067 .write = snd_pcm_write,
1c65d986 4068 .write_iter = snd_pcm_writev,
f87135f5 4069 .open = snd_pcm_playback_open,
2af677fc 4070 .release = snd_pcm_release,
02f4865f 4071 .llseek = no_llseek,
6448fcba 4072 .poll = snd_pcm_poll,
67616fed 4073 .unlocked_ioctl = snd_pcm_ioctl,
2af677fc
CL		 4074 .compat_ioctl = snd_pcm_ioctl_compat,
4075 .mmap = snd_pcm_mmap,
4076 .fasync = snd_pcm_fasync,
55c63bd2 4077 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 4078 },
4079 {
2af677fc
CL		 4080 .owner = THIS_MODULE,
4081 .read = snd_pcm_read,
1c65d986 4082 .read_iter = snd_pcm_readv,
f87135f5 4083 .open = snd_pcm_capture_open,
2af677fc 4084 .release = snd_pcm_release,
02f4865f 4085 .llseek = no_llseek,
6448fcba 4086 .poll = snd_pcm_poll,
67616fed 4087 .unlocked_ioctl = snd_pcm_ioctl,
2af677fc
CL		 4088 .compat_ioctl = snd_pcm_ioctl_compat,
4089 .mmap = snd_pcm_mmap,
4090 .fasync = snd_pcm_fasync,
55c63bd2 4091 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 4092 }
4093};
Ubuntu Jammy Linux kernel mirror