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ALSA: pcm: Clear the full allocated memory at hw_params
[mirror_ubuntu-hirsute-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;
212 strlcpy(info->id, pcm->id, sizeof(info->id));
213 strlcpy(info->name, pcm->name, sizeof(info->name));
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;
218 strlcpy(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{
246 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
247 return false;
425da159
CH		 248
249 if (substream->ops->mmap ||
6111fd23
TI		 250 (substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV &&
251 substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_DEV_UC))
425da159
CH		 252 return true;
253
254 return dma_can_mmap(substream->dma_buffer.dev.dev);
63825f3a
TI		 255}
256
561e1cad
TS		 257static int constrain_mask_params(struct snd_pcm_substream *substream,
258 struct snd_pcm_hw_params *params)
1da177e4 259{
561e1cad
TS		 260 struct snd_pcm_hw_constraints *constrs =
261 &substream->runtime->hw_constraints;
262 struct snd_mask *m;
1da177e4 263 unsigned int k;
561e1cad
TS		 264 struct snd_mask old_mask;
265 int changed;
1da177e4
LT		 266
267 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
268 m = hw_param_mask(params, k);
269 if (snd_mask_empty(m))
270 return -EINVAL;
d81052f9
TS		 271
272 /* This parameter is not requested to change by a caller. */
f9b0c053 273 if (!(params->rmask & PARAM_MASK_BIT(k)))
1da177e4 274 continue;
561e1cad
TS		 275
276 if (trace_hw_mask_param_enabled())
277 old_mask = *m;
278
1da177e4 279 changed = snd_mask_refine(m, constrs_mask(constrs, k));
1da177e4
LT		 280 if (changed < 0)
281 return changed;
82e7d501
TS		 282 if (changed == 0)
283 continue;
561e1cad 284
d81052f9 285 /* Set corresponding flag so that the caller gets it. */
82e7d501 286 trace_hw_mask_param(substream, k, 0, &old_mask, m);
f9b0c053 287 params->cmask |= PARAM_MASK_BIT(k);
1da177e4
LT		 288 }
289
561e1cad
TS		 290 return 0;
291}
292
3432fa04
TS		 293static int constrain_interval_params(struct snd_pcm_substream *substream,
294 struct snd_pcm_hw_params *params)
295{
296 struct snd_pcm_hw_constraints *constrs =
297 &substream->runtime->hw_constraints;
298 struct snd_interval *i;
299 unsigned int k;
300 struct snd_interval old_interval;
301 int changed;
302
1da177e4
LT		 303 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
304 i = hw_param_interval(params, k);
305 if (snd_interval_empty(i))
306 return -EINVAL;
d81052f9
TS		 307
308 /* This parameter is not requested to change by a caller. */
f9b0c053 309 if (!(params->rmask & PARAM_MASK_BIT(k)))
1da177e4 310 continue;
3432fa04
TS		 311
312 if (trace_hw_interval_param_enabled())
313 old_interval = *i;
314
1da177e4 315 changed = snd_interval_refine(i, constrs_interval(constrs, k));
1da177e4
LT		 316 if (changed < 0)
317 return changed;
82e7d501
TS		 318 if (changed == 0)
319 continue;
3432fa04 320
d81052f9 321 /* Set corresponding flag so that the caller gets it. */
82e7d501 322 trace_hw_interval_param(substream, k, 0, &old_interval, i);
f9b0c053 323 params->cmask |= PARAM_MASK_BIT(k);
1da177e4
LT		 324 }
325
3432fa04
TS		 326 return 0;
327}
328
9cc07f55
TS		 329static int constrain_params_by_rules(struct snd_pcm_substream *substream,
330 struct snd_pcm_hw_params *params)
1da177e4 331{
9cc07f55
TS		 332 struct snd_pcm_hw_constraints *constrs =
333 &substream->runtime->hw_constraints;
1da177e4 334 unsigned int k;
5730f9f7 335 unsigned int *rstamps;
1da177e4 336 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
d81052f9 337 unsigned int stamp;
a1c06e39
TS		 338 struct snd_pcm_hw_rule *r;
339 unsigned int d;
9cc07f55
TS		 340 struct snd_mask old_mask;
341 struct snd_interval old_interval;
a1c06e39 342 bool again;
5730f9f7 343 int changed, err = 0;
1da177e4 344
d81052f9
TS		 345 /*
346 * Each application of rule has own sequence number.
347 *
348 * Each member of 'rstamps' array represents the sequence number of
349 * recent application of corresponding rule.
350 */
5730f9f7
TI		 351 rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL);
352 if (!rstamps)
353 return -ENOMEM;
d81052f9
TS		 354
355 /*
356 * Each member of 'vstamps' array represents the sequence number of
357 * recent application of rule in which corresponding parameters were
358 * changed.
359 *
360 * In initial state, elements corresponding to parameters requested by
361 * a caller is 1. For unrequested parameters, corresponding members
362 * have 0 so that the parameters are never changed anymore.
363 */
9cc07f55 364 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
f9b0c053 365 vstamps[k] = (params->rmask & PARAM_MASK_BIT(k)) ? 1 : 0;
d81052f9
TS		 366
367 /* Due to the above design, actual sequence number starts at 2. */
368 stamp = 2;
0d4e3999 369retry:
d81052f9 370 /* Apply all rules in order. */
a1c06e39 371 again = false;
0d4e3999 372 for (k = 0; k < constrs->rules_num; k++) {
a1c06e39 373 r = &constrs->rules[k];
d81052f9
TS		 374
375 /*
376 * Check condition bits of this rule. When the rule has
377 * some condition bits, parameter without the bits is
378 * never processed. SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
379 * is an example of the condition bits.
380 */
0d4e3999
TS		 381 if (r->cond && !(r->cond & params->flags))
382 continue;
d81052f9
TS		 383
384 /*
385 * The 'deps' array includes maximum three dependencies
386 * to SNDRV_PCM_HW_PARAM_XXXs for this rule. The fourth
387 * member of this array is a sentinel and should be
388 * negative value.
389 *
390 * This rule should be processed in this time when dependent
391 * parameters were changed at former applications of the other
392 * rules.
393 */
0d4e3999 394 for (d = 0; r->deps[d] >= 0; d++) {
d656b4a6 395 if (vstamps[r->deps[d]] > rstamps[k])
0d4e3999 396 break;
0d4e3999 397 }
d656b4a6 398 if (r->deps[d] < 0)
0d4e3999 399 continue;
be4e31da 400
0d4e3999
TS		 401 if (trace_hw_mask_param_enabled()) {
402 if (hw_is_mask(r->var))
403 old_mask = *hw_param_mask(params, r->var);
404 }
405 if (trace_hw_interval_param_enabled()) {
406 if (hw_is_interval(r->var))
407 old_interval = *hw_param_interval(params, r->var);
408 }
c6706de0 409
0d4e3999 410 changed = r->func(params, r);
5730f9f7
TI		 411 if (changed < 0) {
412 err = changed;
413 goto out;
414 }
c6706de0 415
d81052f9 416 /*
82e7d501 417 * When the parameter is changed, notify it to the caller
d81052f9
TS		 418 * by corresponding returned bit, then preparing for next
419 * iteration.
420 */
0d4e3999 421 if (changed && r->var >= 0) {
82e7d501
TS		 422 if (hw_is_mask(r->var)) {
423 trace_hw_mask_param(substream, r->var,
424 k + 1, &old_mask,
425 hw_param_mask(params, r->var));
1da177e4 426 }
82e7d501
TS		 427 if (hw_is_interval(r->var)) {
428 trace_hw_interval_param(substream, r->var,
429 k + 1, &old_interval,
430 hw_param_interval(params, r->var));
1da177e4 431 }
82e7d501 432
f9b0c053 433 params->cmask |= PARAM_MASK_BIT(r->var);
0d4e3999 434 vstamps[r->var] = stamp;
a1c06e39 435 again = true;
1da177e4 436 }
f74ae15f 437
82e7d501 438 rstamps[k] = stamp++;
0d4e3999
TS		 439 }
440
d81052f9 441 /* Iterate to evaluate all rules till no parameters are changed. */
0d4e3999
TS		 442 if (again)
443 goto retry;
9cc07f55 444
5730f9f7
TI		 445 out:
446 kfree(rstamps);
447 return err;
9cc07f55
TS		 448}
449
f9a076bf
TS		 450static int fixup_unreferenced_params(struct snd_pcm_substream *substream,
451 struct snd_pcm_hw_params *params)
452{
453 const struct snd_interval *i;
454 const struct snd_mask *m;
455 int err;
456
1da177e4 457 if (!params->msbits) {
f9a076bf 458 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
1da177e4
LT		 459 if (snd_interval_single(i))
460 params->msbits = snd_interval_value(i);
461 }
462
463 if (!params->rate_den) {
f9a076bf 464 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 465 if (snd_interval_single(i)) {
466 params->rate_num = snd_interval_value(i);
467 params->rate_den = 1;
468 }
469 }
470
f9a076bf
TS		 471 if (!params->fifo_size) {
472 m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
473 i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
474 if (snd_mask_single(m) && snd_interval_single(i)) {
fc033cbf
TI		 475 err = snd_pcm_ops_ioctl(substream,
476 SNDRV_PCM_IOCTL1_FIFO_SIZE,
477 params);
f9a076bf
TS		 478 if (err < 0)
479 return err;
480 }
481 }
482
63825f3a 483 if (!params->info) {
7802fb52
TS		 484 params->info = substream->runtime->hw.info;
485 params->info &= ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
486 SNDRV_PCM_INFO_DRAIN_TRIGGER);
63825f3a
TI		 487 if (!hw_support_mmap(substream))
488 params->info &= ~(SNDRV_PCM_INFO_MMAP |
489 SNDRV_PCM_INFO_MMAP_VALID);
490 }
7802fb52 491
f9a076bf
TS		 492 return 0;
493}
494
9cc07f55
TS		 495int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
496 struct snd_pcm_hw_params *params)
497{
9cc07f55
TS		 498 int err;
499
500 params->info = 0;
501 params->fifo_size = 0;
f9b0c053 502 if (params->rmask & PARAM_MASK_BIT(SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
9cc07f55 503 params->msbits = 0;
f9b0c053 504 if (params->rmask & PARAM_MASK_BIT(SNDRV_PCM_HW_PARAM_RATE)) {
9cc07f55
TS		 505 params->rate_num = 0;
506 params->rate_den = 0;
8bea869c 507 }
9cc07f55
TS		 508
509 err = constrain_mask_params(substream, params);
510 if (err < 0)
511 return err;
512
513 err = constrain_interval_params(substream, params);
514 if (err < 0)
515 return err;
516
517 err = constrain_params_by_rules(substream, params);
518 if (err < 0)
519 return err;
520
1da177e4 521 params->rmask = 0;
7802fb52 522
1da177e4
LT		 523 return 0;
524}
e88e8ae6
TI		 525EXPORT_SYMBOL(snd_pcm_hw_refine);
526
877211f5
TI		 527static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
528 struct snd_pcm_hw_params __user * _params)
1da177e4 529{
877211f5 530 struct snd_pcm_hw_params *params;
1da177e4
LT		 531 int err;
532
ef44a1ec
LZ		 533 params = memdup_user(_params, sizeof(*params));
534 if (IS_ERR(params))
535 return PTR_ERR(params);
536
1da177e4 537 err = snd_pcm_hw_refine(substream, params);
f74ae15f
TS		 538 if (err < 0)
539 goto end;
ef44a1ec 540
f74ae15f
TS		 541 err = fixup_unreferenced_params(substream, params);
542 if (err < 0)
543 goto end;
ef44a1ec 544
f74ae15f
TS		 545 if (copy_to_user(_params, params, sizeof(*params)))
546 err = -EFAULT;
547end:
1da177e4
LT		 548 kfree(params);
549 return err;
550}
551
9442e691
TI		 552static int period_to_usecs(struct snd_pcm_runtime *runtime)
553{
554 int usecs;
555
556 if (! runtime->rate)
557 return -1; /* invalid */
558
559 /* take 75% of period time as the deadline */
560 usecs = (750000 / runtime->rate) * runtime->period_size;
561 usecs += ((750000 % runtime->rate) * runtime->period_size) /
562 runtime->rate;
563
564 return usecs;
565}
566
cb639a42
TI		 567static void snd_pcm_set_state(struct snd_pcm_substream *substream,
568 snd_pcm_state_t state)
9b0573c0
TI		 569{
570 snd_pcm_stream_lock_irq(substream);
571 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
572 substream->runtime->status->state = state;
573 snd_pcm_stream_unlock_irq(substream);
574}
575
90bbaf66
JY		 576static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
577 int event)
578{
579#ifdef CONFIG_SND_PCM_TIMER
580 if (substream->timer)
581 snd_timer_notify(substream->timer, event,
582 &substream->runtime->trigger_tstamp);
583#endif
584}
585
1e850bee
TI		 586static void snd_pcm_sync_stop(struct snd_pcm_substream *substream)
587{
588 if (substream->runtime->stop_operating) {
589 substream->runtime->stop_operating = false;
590 if (substream->ops->sync_stop)
591 substream->ops->sync_stop(substream);
fabb26dc
TI		 592 else if (substream->pcm->card->sync_irq > 0)
593 synchronize_irq(substream->pcm->card->sync_irq);
1e850bee
TI		 594 }
595}
596
60f96aae 597/**
f7b6603c 598 * snd_pcm_hw_params_choose - choose a configuration defined by @params
60f96aae
TS		 599 * @pcm: PCM instance
600 * @params: the hw_params instance
601 *
602 * Choose one configuration from configuration space defined by @params.
603 * The configuration chosen is that obtained fixing in this order:
604 * first access, first format, first subformat, min channels,
605 * min rate, min period time, max buffer size, min tick time
606 *
607 * Return: Zero if successful, or a negative error code on failure.
608 */
609static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
610 struct snd_pcm_hw_params *params)
611{
612 static const int vars[] = {
613 SNDRV_PCM_HW_PARAM_ACCESS,
614 SNDRV_PCM_HW_PARAM_FORMAT,
615 SNDRV_PCM_HW_PARAM_SUBFORMAT,
616 SNDRV_PCM_HW_PARAM_CHANNELS,
617 SNDRV_PCM_HW_PARAM_RATE,
618 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
619 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
620 SNDRV_PCM_HW_PARAM_TICK_TIME,
621 -1
622 };
623 const int *v;
7b8a54af
TS		 624 struct snd_mask old_mask;
625 struct snd_interval old_interval;
82e7d501 626 int changed;
60f96aae
TS		 627
628 for (v = vars; *v != -1; v++) {
7b8a54af
TS		 629 /* Keep old parameter to trace. */
630 if (trace_hw_mask_param_enabled()) {
631 if (hw_is_mask(*v))
632 old_mask = *hw_param_mask(params, *v);
633 }
634 if (trace_hw_interval_param_enabled()) {
635 if (hw_is_interval(*v))
636 old_interval = *hw_param_interval(params, *v);
637 }
60f96aae 638 if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
82e7d501 639 changed = snd_pcm_hw_param_first(pcm, params, *v, NULL);
60f96aae 640 else
82e7d501 641 changed = snd_pcm_hw_param_last(pcm, params, *v, NULL);
e1a3a981 642 if (changed < 0)
82e7d501
TS		 643 return changed;
644 if (changed == 0)
645 continue;
7b8a54af 646
82e7d501 647 /* Trace the changed parameter. */
7b8a54af
TS		 648 if (hw_is_mask(*v)) {
649 trace_hw_mask_param(pcm, *v, 0, &old_mask,
650 hw_param_mask(params, *v));
651 }
652 if (hw_is_interval(*v)) {
653 trace_hw_interval_param(pcm, *v, 0, &old_interval,
654 hw_param_interval(params, *v));
655 }
60f96aae 656 }
7b8a54af 657
60f96aae
TS		 658 return 0;
659}
660
877211f5
TI		 661static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
662 struct snd_pcm_hw_params *params)
1da177e4 663{
877211f5 664 struct snd_pcm_runtime *runtime;
9442e691 665 int err, usecs;
1da177e4
LT		 666 unsigned int bits;
667 snd_pcm_uframes_t frames;
668
7eaa943c
TI		 669 if (PCM_RUNTIME_CHECK(substream))
670 return -ENXIO;
1da177e4 671 runtime = substream->runtime;
1da177e4
LT		 672 snd_pcm_stream_lock_irq(substream);
673 switch (runtime->status->state) {
674 case SNDRV_PCM_STATE_OPEN:
675 case SNDRV_PCM_STATE_SETUP:
676 case SNDRV_PCM_STATE_PREPARED:
677 break;
678 default:
679 snd_pcm_stream_unlock_irq(substream);
680 return -EBADFD;
681 }
682 snd_pcm_stream_unlock_irq(substream);
8eeaa2f9 683#if IS_ENABLED(CONFIG_SND_PCM_OSS)
1da177e4
LT		 684 if (!substream->oss.oss)
685#endif
9c323fcb 686 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 687 return -EBADFD;
688
1e850bee
TI		 689 snd_pcm_sync_stop(substream);
690
1da177e4
LT		 691 params->rmask = ~0U;
692 err = snd_pcm_hw_refine(substream, params);
693 if (err < 0)
694 goto _error;
695
696 err = snd_pcm_hw_params_choose(substream, params);
697 if (err < 0)
698 goto _error;
699
f9a076bf
TS		 700 err = fixup_unreferenced_params(substream, params);
701 if (err < 0)
702 goto _error;
703
0dba808e
TI		 704 if (substream->managed_buffer_alloc) {
705 err = snd_pcm_lib_malloc_pages(substream,
706 params_buffer_bytes(params));
707 if (err < 0)
708 goto _error;
709 runtime->buffer_changed = err > 0;
710 }
711
1da177e4
LT		 712 if (substream->ops->hw_params != NULL) {
713 err = substream->ops->hw_params(substream, params);
714 if (err < 0)
715 goto _error;
716 }
717
718 runtime->access = params_access(params);
719 runtime->format = params_format(params);
720 runtime->subformat = params_subformat(params);
721 runtime->channels = params_channels(params);
722 runtime->rate = params_rate(params);
723 runtime->period_size = params_period_size(params);
724 runtime->periods = params_periods(params);
725 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 726 runtime->info = params->info;
727 runtime->rate_num = params->rate_num;
728 runtime->rate_den = params->rate_den;
ab69a490
CL		 729 runtime->no_period_wakeup =
730 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
731 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 732
733 bits = snd_pcm_format_physical_width(runtime->format);
734 runtime->sample_bits = bits;
735 bits *= runtime->channels;
736 runtime->frame_bits = bits;
737 frames = 1;
738 while (bits % 8 != 0) {
739 bits *= 2;
740 frames *= 2;
741 }
742 runtime->byte_align = bits / 8;
743 runtime->min_align = frames;
744
745 /* Default sw params */
746 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
747 runtime->period_step = 1;
1da177e4 748 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 749 runtime->start_threshold = 1;
750 runtime->stop_threshold = runtime->buffer_size;
751 runtime->silence_threshold = 0;
752 runtime->silence_size = 0;
ead4046b
CL		 753 runtime->boundary = runtime->buffer_size;
754 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
755 runtime->boundary *= 2;
1da177e4 756
add9d56d 757 /* clear the buffer for avoiding possible kernel info leaks */
dedb1327
TI		 758 if (runtime->dma_area && !substream->ops->copy_user) {
759 size_t size = runtime->dma_bytes;
760
761 if (runtime->info & SNDRV_PCM_INFO_MMAP)
762 size = PAGE_ALIGN(size);
763 memset(runtime->dma_area, 0, size);
764 }
add9d56d 765
1da177e4 766 snd_pcm_timer_resolution_change(substream);
9b0573c0 767 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
9442e691 768
5371a79b
RW		 769 if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req))
770 cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 771 if ((usecs = period_to_usecs(runtime)) >= 0)
5371a79b
RW		 772 cpu_latency_qos_add_request(&substream->latency_pm_qos_req,
773 usecs);
1da177e4
LT		 774 return 0;
775 _error:
25985edc 776 /* hardware might be unusable from this time,
1da177e4
LT		 777 so we force application to retry to set
778 the correct hardware parameter settings */
9b0573c0 779 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
1da177e4
LT		 780 if (substream->ops->hw_free != NULL)
781 substream->ops->hw_free(substream);
0dba808e
TI		 782 if (substream->managed_buffer_alloc)
783 snd_pcm_lib_free_pages(substream);
1da177e4
LT		 784 return err;
785}
786
877211f5
TI		 787static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
788 struct snd_pcm_hw_params __user * _params)
1da177e4 789{
877211f5 790 struct snd_pcm_hw_params *params;
1da177e4
LT		 791 int err;
792
ef44a1ec
LZ		 793 params = memdup_user(_params, sizeof(*params));
794 if (IS_ERR(params))
795 return PTR_ERR(params);
796
1da177e4 797 err = snd_pcm_hw_params(substream, params);
f74ae15f
TS		 798 if (err < 0)
799 goto end;
ef44a1ec 800
f74ae15f
TS		 801 if (copy_to_user(_params, params, sizeof(*params)))
802 err = -EFAULT;
803end:
1da177e4
LT		 804 kfree(params);
805 return err;
806}
807
66f2d19f
TI		 808static int do_hw_free(struct snd_pcm_substream *substream)
809{
810 int result = 0;
811
812 snd_pcm_sync_stop(substream);
813 if (substream->ops->hw_free)
814 result = substream->ops->hw_free(substream);
815 if (substream->managed_buffer_alloc)
816 snd_pcm_lib_free_pages(substream);
817 return result;
818}
819
877211f5 820static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 821{
877211f5 822 struct snd_pcm_runtime *runtime;
66f2d19f 823 int result;
1da177e4 824
7eaa943c
TI		 825 if (PCM_RUNTIME_CHECK(substream))
826 return -ENXIO;
1da177e4 827 runtime = substream->runtime;
1da177e4
LT		 828 snd_pcm_stream_lock_irq(substream);
829 switch (runtime->status->state) {
830 case SNDRV_PCM_STATE_SETUP:
831 case SNDRV_PCM_STATE_PREPARED:
832 break;
833 default:
834 snd_pcm_stream_unlock_irq(substream);
835 return -EBADFD;
836 }
837 snd_pcm_stream_unlock_irq(substream);
9c323fcb 838 if (atomic_read(&substream->mmap_count))
1da177e4 839 return -EBADFD;
66f2d19f 840 result = do_hw_free(substream);
9b0573c0 841 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
5371a79b 842 cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 843 return result;
844}
845
877211f5
TI		 846static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
847 struct snd_pcm_sw_params *params)
1da177e4 848{
877211f5 849 struct snd_pcm_runtime *runtime;
1250932e 850 int err;
1da177e4 851
7eaa943c
TI		 852 if (PCM_RUNTIME_CHECK(substream))
853 return -ENXIO;
1da177e4 854 runtime = substream->runtime;
1da177e4
LT		 855 snd_pcm_stream_lock_irq(substream);
856 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
857 snd_pcm_stream_unlock_irq(substream);
858 return -EBADFD;
859 }
860 snd_pcm_stream_unlock_irq(substream);
861
145d92e7
DC		 862 if (params->tstamp_mode < 0 ||
863 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
1da177e4 864 return -EINVAL;
58900810
TI		 865 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
866 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
5646eda5 867 return -EINVAL;
1da177e4
LT		 868 if (params->avail_min == 0)
869 return -EINVAL;
1da177e4
LT		 870 if (params->silence_size >= runtime->boundary) {
871 if (params->silence_threshold != 0)
872 return -EINVAL;
873 } else {
874 if (params->silence_size > params->silence_threshold)
875 return -EINVAL;
876 if (params->silence_threshold > runtime->buffer_size)
877 return -EINVAL;
878 }
1250932e 879 err = 0;
1da177e4
LT		 880 snd_pcm_stream_lock_irq(substream);
881 runtime->tstamp_mode = params->tstamp_mode;
58900810
TI		 882 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
883 runtime->tstamp_type = params->tstamp_type;
1da177e4
LT		 884 runtime->period_step = params->period_step;
885 runtime->control->avail_min = params->avail_min;
886 runtime->start_threshold = params->start_threshold;
887 runtime->stop_threshold = params->stop_threshold;
888 runtime->silence_threshold = params->silence_threshold;
889 runtime->silence_size = params->silence_size;
1da177e4
LT		 890 params->boundary = runtime->boundary;
891 if (snd_pcm_running(substream)) {
1da177e4
LT		 892 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
893 runtime->silence_size > 0)
894 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 895 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 896 }
897 snd_pcm_stream_unlock_irq(substream);
1250932e 898 return err;
1da177e4
LT		 899}
900
877211f5
TI		 901static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
902 struct snd_pcm_sw_params __user * _params)
1da177e4 903{
877211f5 904 struct snd_pcm_sw_params params;
1da177e4
LT		 905 int err;
906 if (copy_from_user(&params, _params, sizeof(params)))
907 return -EFAULT;
908 err = snd_pcm_sw_params(substream, &params);
909 if (copy_to_user(_params, &params, sizeof(params)))
910 return -EFAULT;
911 return err;
912}
913
c99c5a3b
TI		 914static inline snd_pcm_uframes_t
915snd_pcm_calc_delay(struct snd_pcm_substream *substream)
916{
917 snd_pcm_uframes_t delay;
918
919 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
920 delay = snd_pcm_playback_hw_avail(substream->runtime);
921 else
922 delay = snd_pcm_capture_avail(substream->runtime);
923 return delay + substream->runtime->delay;
924}
925
3ddee7f8
BW		 926int snd_pcm_status64(struct snd_pcm_substream *substream,
927 struct snd_pcm_status64 *status)
1da177e4 928{
877211f5 929 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 930
931 snd_pcm_stream_lock_irq(substream);
3179f620
PLB		 932
933 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
934 &runtime->audio_tstamp_config);
935
936 /* backwards compatible behavior */
937 if (runtime->audio_tstamp_config.type_requested ==
938 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
939 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
940 runtime->audio_tstamp_config.type_requested =
941 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
942 else
943 runtime->audio_tstamp_config.type_requested =
944 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
945 runtime->audio_tstamp_report.valid = 0;
946 } else
947 runtime->audio_tstamp_report.valid = 1;
948
1da177e4
LT		 949 status->state = runtime->status->state;
950 status->suspended_state = runtime->status->suspended_state;
951 if (status->state == SNDRV_PCM_STATE_OPEN)
952 goto _end;
3ddee7f8
BW		 953 status->trigger_tstamp_sec = runtime->trigger_tstamp.tv_sec;
954 status->trigger_tstamp_nsec = runtime->trigger_tstamp.tv_nsec;
8c121586 955 if (snd_pcm_running(substream)) {
1da177e4 956 snd_pcm_update_hw_ptr(substream);
8c121586 957 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
3ddee7f8
BW		 958 status->tstamp_sec = runtime->status->tstamp.tv_sec;
959 status->tstamp_nsec =
960 runtime->status->tstamp.tv_nsec;
961 status->driver_tstamp_sec =
962 runtime->driver_tstamp.tv_sec;
963 status->driver_tstamp_nsec =
964 runtime->driver_tstamp.tv_nsec;
965 status->audio_tstamp_sec =
966 runtime->status->audio_tstamp.tv_sec;
967 status->audio_tstamp_nsec =
968 runtime->status->audio_tstamp.tv_nsec;
3179f620
PLB		 969 if (runtime->audio_tstamp_report.valid == 1)
970 /* backwards compatibility, no report provided in COMPAT mode */
971 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
972 &status->audio_tstamp_accuracy,
973 &runtime->audio_tstamp_report);
974
8c121586
JK		 975 goto _tstamp_end;
976 }
0d59b814
PLB		 977 } else {
978 /* get tstamp only in fallback mode and only if enabled */
fcae40c9
BW		 979 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
980 struct timespec64 tstamp;
981
982 snd_pcm_gettime(runtime, &tstamp);
3ddee7f8
BW		 983 status->tstamp_sec = tstamp.tv_sec;
984 status->tstamp_nsec = tstamp.tv_nsec;
fcae40c9 985 }
8c121586 986 }
8c121586 987 _tstamp_end:
1da177e4
LT		 988 status->appl_ptr = runtime->control->appl_ptr;
989 status->hw_ptr = runtime->status->hw_ptr;
763e5067 990 status->avail = snd_pcm_avail(substream);
c99c5a3b
TI		 991 status->delay = snd_pcm_running(substream) ?
992 snd_pcm_calc_delay(substream) : 0;
1da177e4
LT		 993 status->avail_max = runtime->avail_max;
994 status->overrange = runtime->overrange;
995 runtime->avail_max = 0;
996 runtime->overrange = 0;
997 _end:
998 snd_pcm_stream_unlock_irq(substream);
999 return 0;
1000}
1001
3ddee7f8
BW		 1002static int snd_pcm_status_user64(struct snd_pcm_substream *substream,
1003 struct snd_pcm_status64 __user * _status,
1004 bool ext)
1da177e4 1005{
3ddee7f8 1006 struct snd_pcm_status64 status;
1da177e4 1007 int res;
38ca2a4d 1008
1da177e4 1009 memset(&status, 0, sizeof(status));
38ca2a4d
PLB		 1010 /*
1011 * with extension, parameters are read/write,
1012 * get audio_tstamp_data from user,
1013 * ignore rest of status structure
1014 */
1015 if (ext && get_user(status.audio_tstamp_data,
1016 (u32 __user *)(&_status->audio_tstamp_data)))
1017 return -EFAULT;
3ddee7f8 1018 res = snd_pcm_status64(substream, &status);
1da177e4
LT		 1019 if (res < 0)
1020 return res;
1021 if (copy_to_user(_status, &status, sizeof(status)))
1022 return -EFAULT;
1023 return 0;
1024}
1025
3ddee7f8
BW		 1026static int snd_pcm_status_user32(struct snd_pcm_substream *substream,
1027 struct snd_pcm_status32 __user * _status,
1028 bool ext)
1029{
1030 struct snd_pcm_status64 status64;
1031 struct snd_pcm_status32 status32;
1032 int res;
1033
1034 memset(&status64, 0, sizeof(status64));
1035 memset(&status32, 0, sizeof(status32));
1036 /*
1037 * with extension, parameters are read/write,
1038 * get audio_tstamp_data from user,
1039 * ignore rest of status structure
1040 */
1041 if (ext && get_user(status64.audio_tstamp_data,
1042 (u32 __user *)(&_status->audio_tstamp_data)))
1043 return -EFAULT;
1044 res = snd_pcm_status64(substream, &status64);
1045 if (res < 0)
1046 return res;
1047
1048 status32 = (struct snd_pcm_status32) {
1049 .state = status64.state,
1050 .trigger_tstamp_sec = status64.trigger_tstamp_sec,
1051 .trigger_tstamp_nsec = status64.trigger_tstamp_nsec,
1052 .tstamp_sec = status64.tstamp_sec,
1053 .tstamp_nsec = status64.tstamp_nsec,
1054 .appl_ptr = status64.appl_ptr,
1055 .hw_ptr = status64.hw_ptr,
1056 .delay = status64.delay,
1057 .avail = status64.avail,
1058 .avail_max = status64.avail_max,
1059 .overrange = status64.overrange,
1060 .suspended_state = status64.suspended_state,
1061 .audio_tstamp_data = status64.audio_tstamp_data,
1062 .audio_tstamp_sec = status64.audio_tstamp_sec,
1063 .audio_tstamp_nsec = status64.audio_tstamp_nsec,
1064 .driver_tstamp_sec = status64.audio_tstamp_sec,
1065 .driver_tstamp_nsec = status64.audio_tstamp_nsec,
1066 .audio_tstamp_accuracy = status64.audio_tstamp_accuracy,
1067 };
1068
1069 if (copy_to_user(_status, &status32, sizeof(status32)))
1070 return -EFAULT;
1071
1072 return 0;
1073}
1074
877211f5
TI		 1075static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
1076 struct snd_pcm_channel_info * info)
1da177e4 1077{
877211f5 1078 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1079 unsigned int channel;
1080
1da177e4
LT		 1081 channel = info->channel;
1082 runtime = substream->runtime;
1083 snd_pcm_stream_lock_irq(substream);
1084 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
1085 snd_pcm_stream_unlock_irq(substream);
1086 return -EBADFD;
1087 }
1088 snd_pcm_stream_unlock_irq(substream);
1089 if (channel >= runtime->channels)
1090 return -EINVAL;
1091 memset(info, 0, sizeof(*info));
1092 info->channel = channel;
fc033cbf 1093 return snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
1da177e4
LT		 1094}
1095
877211f5
TI		 1096static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
1097 struct snd_pcm_channel_info __user * _info)
1da177e4 1098{
877211f5 1099 struct snd_pcm_channel_info info;
1da177e4
LT		 1100 int res;
1101
1102 if (copy_from_user(&info, _info, sizeof(info)))
1103 return -EFAULT;
1104 res = snd_pcm_channel_info(substream, &info);
1105 if (res < 0)
1106 return res;
1107 if (copy_to_user(_info, &info, sizeof(info)))
1108 return -EFAULT;
1109 return 0;
1110}
1111
877211f5 1112static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 1113{
877211f5 1114 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1115 if (runtime->trigger_master == NULL)
1116 return;
1117 if (runtime->trigger_master == substream) {
2b79d7a6
PLB		 1118 if (!runtime->trigger_tstamp_latched)
1119 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 1120 } else {
1121 snd_pcm_trigger_tstamp(runtime->trigger_master);
1122 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
1123 }
1124 runtime->trigger_master = NULL;
1125}
1126
cb639a42
TI		 1127#define ACTION_ARG_IGNORE (__force snd_pcm_state_t)0
1128
1da177e4 1129struct action_ops {
cb639a42
TI		 1130 int (*pre_action)(struct snd_pcm_substream *substream,
1131 snd_pcm_state_t state);
1132 int (*do_action)(struct snd_pcm_substream *substream,
1133 snd_pcm_state_t state);
1134 void (*undo_action)(struct snd_pcm_substream *substream,
1135 snd_pcm_state_t state);
1136 void (*post_action)(struct snd_pcm_substream *substream,
1137 snd_pcm_state_t state);
1da177e4
LT		 1138};
1139
1140/*
1141 * this functions is core for handling of linked stream
1142 * Note: the stream state might be changed also on failure
1143 * Note2: call with calling stream lock + link lock
1144 */
b17154cf 1145static int snd_pcm_action_group(const struct action_ops *ops,
877211f5 1146 struct snd_pcm_substream *substream,
cb639a42
TI		 1147 snd_pcm_state_t state,
1148 bool do_lock)
1da177e4 1149{
877211f5
TI		 1150 struct snd_pcm_substream *s = NULL;
1151 struct snd_pcm_substream *s1;
dde1c652 1152 int res = 0, depth = 1;
1da177e4 1153
ef991b95 1154 snd_pcm_group_for_each_entry(s, substream) {
257f8cce
TI		 1155 if (do_lock && s != substream) {
1156 if (s->pcm->nonatomic)
dde1c652 1157 mutex_lock_nested(&s->self_group.mutex, depth);
257f8cce 1158 else
dde1c652
TI		 1159 spin_lock_nested(&s->self_group.lock, depth);
1160 depth++;
257f8cce 1161 }
1da177e4
LT		 1162 res = ops->pre_action(s, state);
1163 if (res < 0)
1164 goto _unlock;
1165 }
ef991b95 1166 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 1167 res = ops->do_action(s, state);
1168 if (res < 0) {
1169 if (ops->undo_action) {
ef991b95 1170 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 1171 if (s1 == s) /* failed stream */
1172 break;
1173 ops->undo_action(s1, state);
1174 }
1175 }
1176 s = NULL; /* unlock all */
1177 goto _unlock;
1178 }
1179 }
ef991b95 1180 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 1181 ops->post_action(s, state);
1182 }
1183 _unlock:
1184 if (do_lock) {
1185 /* unlock streams */
ef991b95 1186 snd_pcm_group_for_each_entry(s1, substream) {
257f8cce 1187 if (s1 != substream) {
811deede 1188 if (s1->pcm->nonatomic)
257f8cce
TI		 1189 mutex_unlock(&s1->self_group.mutex);
1190 else
1191 spin_unlock(&s1->self_group.lock);
1192 }
1da177e4
LT		 1193 if (s1 == s) /* end */
1194 break;
1195 }
1196 }
1197 return res;
1198}
1199
1200/*
1201 * Note: call with stream lock
1202 */
b17154cf 1203static int snd_pcm_action_single(const struct action_ops *ops,
877211f5 1204 struct snd_pcm_substream *substream,
cb639a42 1205 snd_pcm_state_t state)
1da177e4
LT		 1206{
1207 int res;
1208
1209 res = ops->pre_action(substream, state);
1210 if (res < 0)
1211 return res;
1212 res = ops->do_action(substream, state);
1213 if (res == 0)
1214 ops->post_action(substream, state);
1215 else if (ops->undo_action)
1216 ops->undo_action(substream, state);
1217 return res;
1218}
1219
a41c4cb9
TI		 1220static void snd_pcm_group_assign(struct snd_pcm_substream *substream,
1221 struct snd_pcm_group *new_group)
1222{
1223 substream->group = new_group;
1224 list_move(&substream->link_list, &new_group->substreams);
1225}
1226
f57f3df0
TI		 1227/*
1228 * Unref and unlock the group, but keep the stream lock;
1229 * when the group becomes empty and no longer referred, destroy itself
1230 */
1231static void snd_pcm_group_unref(struct snd_pcm_group *group,
1232 struct snd_pcm_substream *substream)
1233{
1234 bool do_free;
1235
1236 if (!group)
1237 return;
0e279dce 1238 do_free = refcount_dec_and_test(&group->refs);
f57f3df0
TI		 1239 snd_pcm_group_unlock(group, substream->pcm->nonatomic);
1240 if (do_free)
1241 kfree(group);
1242}
1243
1244/*
1245 * Lock the group inside a stream lock and reference it;
1246 * return the locked group object, or NULL if not linked
1247 */
1248static struct snd_pcm_group *
1249snd_pcm_stream_group_ref(struct snd_pcm_substream *substream)
1250{
1251 bool nonatomic = substream->pcm->nonatomic;
1252 struct snd_pcm_group *group;
1253 bool trylock;
1254
1255 for (;;) {
1256 if (!snd_pcm_stream_linked(substream))
1257 return NULL;
1258 group = substream->group;
1259 /* block freeing the group object */
1260 refcount_inc(&group->refs);
1261
1262 trylock = nonatomic ? mutex_trylock(&group->mutex) :
1263 spin_trylock(&group->lock);
1264 if (trylock)
1265 break; /* OK */
1266
1267 /* re-lock for avoiding ABBA deadlock */
1268 snd_pcm_stream_unlock(substream);
1269 snd_pcm_group_lock(group, nonatomic);
1270 snd_pcm_stream_lock(substream);
1271
1272 /* check the group again; the above opens a small race window */
1273 if (substream->group == group)
1274 break; /* OK */
1275 /* group changed, try again */
1276 snd_pcm_group_unref(group, substream);
1277 }
1278 return group;
1279}
1280
aa8edd8c
TI		 1281/*
1282 * Note: call with stream lock
1283 */
b17154cf 1284static int snd_pcm_action(const struct action_ops *ops,
aa8edd8c 1285 struct snd_pcm_substream *substream,
cb639a42 1286 snd_pcm_state_t state)
257f8cce 1287{
f57f3df0 1288 struct snd_pcm_group *group;
257f8cce
TI		 1289 int res;
1290
f57f3df0
TI		 1291 group = snd_pcm_stream_group_ref(substream);
1292 if (group)
cb639a42 1293 res = snd_pcm_action_group(ops, substream, state, true);
f57f3df0
TI		 1294 else
1295 res = snd_pcm_action_single(ops, substream, state);
1296 snd_pcm_group_unref(group, substream);
1da177e4
LT		 1297 return res;
1298}
1299
1300/*
1301 * Note: don't use any locks before
1302 */
b17154cf 1303static int snd_pcm_action_lock_irq(const struct action_ops *ops,
877211f5 1304 struct snd_pcm_substream *substream,
cb639a42 1305 snd_pcm_state_t state)
1da177e4
LT		 1306{
1307 int res;
1308
e3a4bd5e
TI		 1309 snd_pcm_stream_lock_irq(substream);
1310 res = snd_pcm_action(ops, substream, state);
1311 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1312 return res;
1313}
1314
1315/*
1316 */
b17154cf 1317static int snd_pcm_action_nonatomic(const struct action_ops *ops,
877211f5 1318 struct snd_pcm_substream *substream,
cb639a42 1319 snd_pcm_state_t state)
1da177e4
LT		 1320{
1321 int res;
1322
f57f3df0 1323 /* Guarantee the group members won't change during non-atomic action */
1da177e4
LT		 1324 down_read(&snd_pcm_link_rwsem);
1325 if (snd_pcm_stream_linked(substream))
cb639a42 1326 res = snd_pcm_action_group(ops, substream, state, false);
1da177e4
LT		 1327 else
1328 res = snd_pcm_action_single(ops, substream, state);
1329 up_read(&snd_pcm_link_rwsem);
1330 return res;
1331}
1332
1333/*
1334 * start callbacks
1335 */
cb639a42
TI		 1336static int snd_pcm_pre_start(struct snd_pcm_substream *substream,
1337 snd_pcm_state_t state)
1da177e4 1338{
877211f5 1339 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1340 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1341 return -EBADFD;
1342 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1343 !snd_pcm_playback_data(substream))
1344 return -EPIPE;
2b79d7a6 1345 runtime->trigger_tstamp_latched = false;
1da177e4
LT		 1346 runtime->trigger_master = substream;
1347 return 0;
1348}
1349
cb639a42
TI		 1350static int snd_pcm_do_start(struct snd_pcm_substream *substream,
1351 snd_pcm_state_t state)
1da177e4
LT		 1352{
1353 if (substream->runtime->trigger_master != substream)
1354 return 0;
1355 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1356}
1357
cb639a42
TI		 1358static void snd_pcm_undo_start(struct snd_pcm_substream *substream,
1359 snd_pcm_state_t state)
1da177e4
LT		 1360{
1361 if (substream->runtime->trigger_master == substream)
1362 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1363}
1364
cb639a42
TI		 1365static void snd_pcm_post_start(struct snd_pcm_substream *substream,
1366 snd_pcm_state_t state)
1da177e4 1367{
877211f5 1368 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1369 snd_pcm_trigger_tstamp(substream);
6af3fb72 1370 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 1371 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1372 runtime->rate;
1da177e4
LT		 1373 runtime->status->state = state;
1374 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1375 runtime->silence_size > 0)
1376 snd_pcm_playback_silence(substream, ULONG_MAX);
90bbaf66 1377 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
1da177e4
LT		 1378}
1379
b17154cf 1380static const struct action_ops snd_pcm_action_start = {
1da177e4
LT		 1381 .pre_action = snd_pcm_pre_start,
1382 .do_action = snd_pcm_do_start,
1383 .undo_action = snd_pcm_undo_start,
1384 .post_action = snd_pcm_post_start
1385};
1386
1387/**
1c85cc64 1388 * snd_pcm_start - start all linked streams
df8db936 1389 * @substream: the PCM substream instance
eb7c06e8
YB		 1390 *
1391 * Return: Zero if successful, or a negative error code.
c2c86a97 1392 * The stream lock must be acquired before calling this function.
1da177e4 1393 */
877211f5 1394int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 1395{
877211f5
TI		 1396 return snd_pcm_action(&snd_pcm_action_start, substream,
1397 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 1398}
1399
c2c86a97
TI		 1400/* take the stream lock and start the streams */
1401static int snd_pcm_start_lock_irq(struct snd_pcm_substream *substream)
1402{
1403 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream,
1404 SNDRV_PCM_STATE_RUNNING);
1405}
1406
1da177e4
LT		 1407/*
1408 * stop callbacks
1409 */
cb639a42
TI		 1410static int snd_pcm_pre_stop(struct snd_pcm_substream *substream,
1411 snd_pcm_state_t state)
1da177e4 1412{
877211f5 1413 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1414 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1415 return -EBADFD;
1416 runtime->trigger_master = substream;
1417 return 0;
1418}
1419
cb639a42
TI		 1420static int snd_pcm_do_stop(struct snd_pcm_substream *substream,
1421 snd_pcm_state_t state)
1da177e4
LT		 1422{
1423 if (substream->runtime->trigger_master == substream &&
1424 snd_pcm_running(substream))
1425 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1426 return 0; /* unconditonally stop all substreams */
1427}
1428
cb639a42
TI		 1429static void snd_pcm_post_stop(struct snd_pcm_substream *substream,
1430 snd_pcm_state_t state)
1da177e4 1431{
877211f5 1432 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1433 if (runtime->status->state != state) {
1434 snd_pcm_trigger_tstamp(substream);
9bc889b4 1435 runtime->status->state = state;
90bbaf66 1436 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
1da177e4 1437 }
1e850bee 1438 runtime->stop_operating = true;
1da177e4 1439 wake_up(&runtime->sleep);
c91a988d 1440 wake_up(&runtime->tsleep);
1da177e4
LT		 1441}
1442
b17154cf 1443static const struct action_ops snd_pcm_action_stop = {
1da177e4
LT		 1444 .pre_action = snd_pcm_pre_stop,
1445 .do_action = snd_pcm_do_stop,
1446 .post_action = snd_pcm_post_stop
1447};
1448
1449/**
1c85cc64 1450 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 1451 * @substream: the PCM substream instance
1452 * @state: PCM state after stopping the stream
1da177e4 1453 *
1c85cc64 1454 * The state of each stream is then changed to the given state unconditionally.
eb7c06e8 1455 *
0a11458c 1456 * Return: Zero if successful, or a negative error code.
1da177e4 1457 */
fea952e5 1458int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 1459{
1460 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1461}
e88e8ae6
TI		 1462EXPORT_SYMBOL(snd_pcm_stop);
1463
1da177e4 1464/**
1c85cc64 1465 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 1466 * @substream: the PCM substream
1da177e4 1467 *
1c85cc64 1468 * After stopping, the state is changed to SETUP.
1da177e4 1469 * Unlike snd_pcm_stop(), this affects only the given stream.
eb7c06e8
YB		 1470 *
1471 * Return: Zero if succesful, or a negative error code.
1da177e4 1472 */
877211f5 1473int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 1474{
877211f5
TI		 1475 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1476 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 1477}
1478
1fb8510c
TI		 1479/**
1480 * snd_pcm_stop_xrun - stop the running streams as XRUN
1481 * @substream: the PCM substream instance
1fb8510c
TI		 1482 *
1483 * This stops the given running substream (and all linked substreams) as XRUN.
1484 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1485 *
1486 * Return: Zero if successful, or a negative error code.
1487 */
1488int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1489{
1490 unsigned long flags;
1fb8510c
TI		 1491
1492 snd_pcm_stream_lock_irqsave(substream, flags);
e647f5a5 1493 if (substream->runtime && snd_pcm_running(substream))
9cd641ed 1494 __snd_pcm_xrun(substream);
1fb8510c 1495 snd_pcm_stream_unlock_irqrestore(substream, flags);
9cd641ed 1496 return 0;
1fb8510c
TI		 1497}
1498EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1499
1da177e4 1500/*
cb639a42 1501 * pause callbacks: pass boolean (to start pause or resume) as state argument
1da177e4 1502 */
cb639a42
TI		 1503#define pause_pushed(state) (__force bool)(state)
1504
1505static int snd_pcm_pre_pause(struct snd_pcm_substream *substream,
1506 snd_pcm_state_t state)
1da177e4 1507{
877211f5 1508 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1509 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1510 return -ENOSYS;
cb639a42 1511 if (pause_pushed(state)) {
1da177e4
LT		 1512 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1513 return -EBADFD;
1514 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1515 return -EBADFD;
1516 runtime->trigger_master = substream;
1517 return 0;
1518}
1519
cb639a42
TI		 1520static int snd_pcm_do_pause(struct snd_pcm_substream *substream,
1521 snd_pcm_state_t state)
1da177e4
LT		 1522{
1523 if (substream->runtime->trigger_master != substream)
1524 return 0;
56385a12
JK		 1525 /* some drivers might use hw_ptr to recover from the pause -
1526 update the hw_ptr now */
cb639a42 1527 if (pause_pushed(state))
56385a12 1528 snd_pcm_update_hw_ptr(substream);
6af3fb72 1529 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 1530 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1531 * delta, effectively to skip the check once.
1532 */
1533 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4 1534 return substream->ops->trigger(substream,
cb639a42
TI		 1535 pause_pushed(state) ?
1536 SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1537 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1da177e4
LT		 1538}
1539
cb639a42
TI		 1540static void snd_pcm_undo_pause(struct snd_pcm_substream *substream,
1541 snd_pcm_state_t state)
1da177e4
LT		 1542{
1543 if (substream->runtime->trigger_master == substream)
1544 substream->ops->trigger(substream,
cb639a42
TI		 1545 pause_pushed(state) ?
1546 SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1da177e4
LT		 1547 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1548}
1549
cb639a42
TI		 1550static void snd_pcm_post_pause(struct snd_pcm_substream *substream,
1551 snd_pcm_state_t state)
1da177e4 1552{
877211f5 1553 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1554 snd_pcm_trigger_tstamp(substream);
cb639a42 1555 if (pause_pushed(state)) {
1da177e4 1556 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
90bbaf66 1557 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
1da177e4 1558 wake_up(&runtime->sleep);
c91a988d 1559 wake_up(&runtime->tsleep);
1da177e4
LT		 1560 } else {
1561 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
90bbaf66 1562 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
1da177e4
LT		 1563 }
1564}
1565
b17154cf 1566static const struct action_ops snd_pcm_action_pause = {
1da177e4
LT		 1567 .pre_action = snd_pcm_pre_pause,
1568 .do_action = snd_pcm_do_pause,
1569 .undo_action = snd_pcm_undo_pause,
1570 .post_action = snd_pcm_post_pause
1571};
1572
1573/*
1574 * Push/release the pause for all linked streams.
1575 */
cb639a42 1576static int snd_pcm_pause(struct snd_pcm_substream *substream, bool push)
1da177e4 1577{
cb639a42
TI		 1578 return snd_pcm_action(&snd_pcm_action_pause, substream,
1579 (__force snd_pcm_state_t)push);
1580}
1581
1582static int snd_pcm_pause_lock_irq(struct snd_pcm_substream *substream,
1583 bool push)
1584{
1585 return snd_pcm_action_lock_irq(&snd_pcm_action_pause, substream,
1586 (__force snd_pcm_state_t)push);
1da177e4
LT		 1587}
1588
1589#ifdef CONFIG_PM
cb639a42 1590/* suspend callback: state argument ignored */
1da177e4 1591
cb639a42
TI		 1592static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream,
1593 snd_pcm_state_t state)
1da177e4 1594{
877211f5 1595 struct snd_pcm_runtime *runtime = substream->runtime;
113ce081
TI		 1596 switch (runtime->status->state) {
1597 case SNDRV_PCM_STATE_SUSPENDED:
1da177e4 1598 return -EBUSY;
113ce081
TI		 1599 /* unresumable PCM state; return -EBUSY for skipping suspend */
1600 case SNDRV_PCM_STATE_OPEN:
1601 case SNDRV_PCM_STATE_SETUP:
1602 case SNDRV_PCM_STATE_DISCONNECTED:
1603 return -EBUSY;
1604 }
1da177e4
LT		 1605 runtime->trigger_master = substream;
1606 return 0;
1607}
1608
cb639a42
TI		 1609static int snd_pcm_do_suspend(struct snd_pcm_substream *substream,
1610 snd_pcm_state_t state)
1da177e4 1611{
877211f5 1612 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1613 if (runtime->trigger_master != substream)
1614 return 0;
1615 if (! snd_pcm_running(substream))
1616 return 0;
1617 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1618 return 0; /* suspend unconditionally */
1619}
1620
cb639a42
TI		 1621static void snd_pcm_post_suspend(struct snd_pcm_substream *substream,
1622 snd_pcm_state_t state)
1da177e4 1623{
877211f5 1624 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1625 snd_pcm_trigger_tstamp(substream);
9bc889b4
TI		 1626 runtime->status->suspended_state = runtime->status->state;
1627 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
90bbaf66 1628 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
1da177e4 1629 wake_up(&runtime->sleep);
c91a988d 1630 wake_up(&runtime->tsleep);
1da177e4
LT		 1631}
1632
b17154cf 1633static const struct action_ops snd_pcm_action_suspend = {
1da177e4
LT		 1634 .pre_action = snd_pcm_pre_suspend,
1635 .do_action = snd_pcm_do_suspend,
1636 .post_action = snd_pcm_post_suspend
1637};
1638
ce7f93e2 1639/*
1c85cc64 1640 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1641 * @substream: the PCM substream
1da177e4 1642 *
1da177e4 1643 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8 1644 *
ce7f93e2 1645 * Return: Zero if successful, or a negative error code.
1da177e4 1646 */
ce7f93e2 1647static int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1648{
1649 int err;
1650 unsigned long flags;
1651
1652 snd_pcm_stream_lock_irqsave(substream, flags);
cb639a42
TI		 1653 err = snd_pcm_action(&snd_pcm_action_suspend, substream,
1654 ACTION_ARG_IGNORE);
1da177e4
LT		 1655 snd_pcm_stream_unlock_irqrestore(substream, flags);
1656 return err;
1657}
e88e8ae6 1658
1da177e4 1659/**
1c85cc64 1660 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1661 * @pcm: the PCM instance
1da177e4 1662 *
1da177e4 1663 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1664 *
1665 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1da177e4 1666 */
877211f5 1667int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1668{
877211f5 1669 struct snd_pcm_substream *substream;
1da177e4
LT		 1670 int stream, err = 0;
1671
603bf524
TI		 1672 if (! pcm)
1673 return 0;
1674
1da177e4 1675 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1676 for (substream = pcm->streams[stream].substream;
1677 substream; substream = substream->next) {
1da177e4
LT		 1678 /* FIXME: the open/close code should lock this as well */
1679 if (substream->runtime == NULL)
1680 continue;
d9c0b2af
RS		 1681
1682 /*
1683 * Skip BE dai link PCM's that are internal and may
1684 * not have their substream ops set.
1685 */
1686 if (!substream->ops)
1687 continue;
1688
1da177e4
LT		 1689 err = snd_pcm_suspend(substream);
1690 if (err < 0 && err != -EBUSY)
1691 return err;
1692 }
1693 }
1694 return 0;
1695}
e88e8ae6
TI		 1696EXPORT_SYMBOL(snd_pcm_suspend_all);
1697
cb639a42 1698/* resume callbacks: state argument ignored */
1da177e4 1699
cb639a42
TI		 1700static int snd_pcm_pre_resume(struct snd_pcm_substream *substream,
1701 snd_pcm_state_t state)
1da177e4 1702{
877211f5 1703 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1704 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1705 return -ENOSYS;
1706 runtime->trigger_master = substream;
1707 return 0;
1708}
1709
cb639a42
TI		 1710static int snd_pcm_do_resume(struct snd_pcm_substream *substream,
1711 snd_pcm_state_t state)
1da177e4 1712{
877211f5 1713 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1714 if (runtime->trigger_master != substream)
1715 return 0;
1716 /* DMA not running previously? */
1717 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1718 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1719 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1720 return 0;
1721 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1722}
1723
cb639a42
TI		 1724static void snd_pcm_undo_resume(struct snd_pcm_substream *substream,
1725 snd_pcm_state_t state)
1da177e4
LT		 1726{
1727 if (substream->runtime->trigger_master == substream &&
1728 snd_pcm_running(substream))
1729 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1730}
1731
cb639a42
TI		 1732static void snd_pcm_post_resume(struct snd_pcm_substream *substream,
1733 snd_pcm_state_t state)
1da177e4 1734{
877211f5 1735 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1736 snd_pcm_trigger_tstamp(substream);
9bc889b4 1737 runtime->status->state = runtime->status->suspended_state;
90bbaf66 1738 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
1e850bee 1739 snd_pcm_sync_stop(substream);
1da177e4
LT		 1740}
1741
b17154cf 1742static const struct action_ops snd_pcm_action_resume = {
1da177e4
LT		 1743 .pre_action = snd_pcm_pre_resume,
1744 .do_action = snd_pcm_do_resume,
1745 .undo_action = snd_pcm_undo_resume,
1746 .post_action = snd_pcm_post_resume
1747};
1748
877211f5 1749static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1750{
cb639a42
TI		 1751 return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream,
1752 ACTION_ARG_IGNORE);
1da177e4
LT		 1753}
1754
1755#else
1756
877211f5 1757static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1758{
1759 return -ENOSYS;
1760}
1761
1762#endif /* CONFIG_PM */
1763
1764/*
1765 * xrun ioctl
1766 *
1767 * Change the RUNNING stream(s) to XRUN state.
1768 */
877211f5 1769static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1770{
877211f5 1771 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1772 int result;
1773
1da177e4
LT		 1774 snd_pcm_stream_lock_irq(substream);
1775 switch (runtime->status->state) {
1776 case SNDRV_PCM_STATE_XRUN:
1777 result = 0; /* already there */
1778 break;
1779 case SNDRV_PCM_STATE_RUNNING:
9cd641ed
TI		 1780 __snd_pcm_xrun(substream);
1781 result = 0;
1da177e4
LT		 1782 break;
1783 default:
1784 result = -EBADFD;
1785 }
1786 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1787 return result;
1788}
1789
1790/*
1791 * reset ioctl
1792 */
cb639a42
TI		 1793/* reset callbacks: state argument ignored */
1794static int snd_pcm_pre_reset(struct snd_pcm_substream *substream,
1795 snd_pcm_state_t state)
1da177e4 1796{
877211f5 1797 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1798 switch (runtime->status->state) {
1799 case SNDRV_PCM_STATE_RUNNING:
1800 case SNDRV_PCM_STATE_PREPARED:
1801 case SNDRV_PCM_STATE_PAUSED:
1802 case SNDRV_PCM_STATE_SUSPENDED:
1803 return 0;
1804 default:
1805 return -EBADFD;
1806 }
1807}
1808
cb639a42
TI		 1809static int snd_pcm_do_reset(struct snd_pcm_substream *substream,
1810 snd_pcm_state_t state)
1da177e4 1811{
877211f5 1812 struct snd_pcm_runtime *runtime = substream->runtime;
fc033cbf 1813 int err = snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1da177e4
LT		 1814 if (err < 0)
1815 return err;
1da177e4 1816 runtime->hw_ptr_base = 0;
e7636925
JK		 1817 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1818 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1819 runtime->silence_start = runtime->status->hw_ptr;
1820 runtime->silence_filled = 0;
1821 return 0;
1822}
1823
cb639a42
TI		 1824static void snd_pcm_post_reset(struct snd_pcm_substream *substream,
1825 snd_pcm_state_t state)
1da177e4 1826{
877211f5 1827 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1828 runtime->control->appl_ptr = runtime->status->hw_ptr;
1829 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1830 runtime->silence_size > 0)
1831 snd_pcm_playback_silence(substream, ULONG_MAX);
1832}
1833
b17154cf 1834static const struct action_ops snd_pcm_action_reset = {
1da177e4
LT		 1835 .pre_action = snd_pcm_pre_reset,
1836 .do_action = snd_pcm_do_reset,
1837 .post_action = snd_pcm_post_reset
1838};
1839
877211f5 1840static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4 1841{
cb639a42
TI		 1842 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream,
1843 ACTION_ARG_IGNORE);
1da177e4
LT		 1844}
1845
1846/*
1847 * prepare ioctl
1848 */
cb639a42 1849/* pass f_flags as state argument */
0df63e44 1850static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
cb639a42 1851 snd_pcm_state_t state)
1da177e4 1852{
877211f5 1853 struct snd_pcm_runtime *runtime = substream->runtime;
cb639a42
TI		 1854 int f_flags = (__force int)state;
1855
de1b8b93
TI		 1856 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1857 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1858 return -EBADFD;
1859 if (snd_pcm_running(substream))
1860 return -EBUSY;
0df63e44 1861 substream->f_flags = f_flags;
1da177e4
LT		 1862 return 0;
1863}
1864
cb639a42
TI		 1865static int snd_pcm_do_prepare(struct snd_pcm_substream *substream,
1866 snd_pcm_state_t state)
1da177e4
LT		 1867{
1868 int err;
1e850bee 1869 snd_pcm_sync_stop(substream);
1da177e4
LT		 1870 err = substream->ops->prepare(substream);
1871 if (err < 0)
1872 return err;
cb639a42 1873 return snd_pcm_do_reset(substream, state);
1da177e4
LT		 1874}
1875
cb639a42
TI		 1876static void snd_pcm_post_prepare(struct snd_pcm_substream *substream,
1877 snd_pcm_state_t state)
1da177e4 1878{
877211f5 1879 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1880 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1881 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1882}
1883
b17154cf 1884static const struct action_ops snd_pcm_action_prepare = {
1da177e4
LT		 1885 .pre_action = snd_pcm_pre_prepare,
1886 .do_action = snd_pcm_do_prepare,
1887 .post_action = snd_pcm_post_prepare
1888};
1889
1890/**
1c85cc64 1891 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1892 * @substream: the PCM substream instance
0df63e44 1893 * @file: file to refer f_flags
eb7c06e8
YB		 1894 *
1895 * Return: Zero if successful, or a negative error code.
1da177e4 1896 */
0df63e44
TI		 1897static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1898 struct file *file)
1da177e4 1899{
0df63e44
TI		 1900 int f_flags;
1901
1902 if (file)
1903 f_flags = file->f_flags;
1904 else
1905 f_flags = substream->f_flags;
1da177e4 1906
1b745cd9
TI		 1907 snd_pcm_stream_lock_irq(substream);
1908 switch (substream->runtime->status->state) {
1909 case SNDRV_PCM_STATE_PAUSED:
cb639a42 1910 snd_pcm_pause(substream, false);
c0dbbdad 1911 fallthrough;
1b745cd9
TI		 1912 case SNDRV_PCM_STATE_SUSPENDED:
1913 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1914 break;
1915 }
1916 snd_pcm_stream_unlock_irq(substream);
1917
68b4acd3 1918 return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
cb639a42
TI		 1919 substream,
1920 (__force snd_pcm_state_t)f_flags);
1da177e4
LT		 1921}
1922
1923/*
1924 * drain ioctl
1925 */
1926
cb639a42
TI		 1927/* drain init callbacks: state argument ignored */
1928static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream,
1929 snd_pcm_state_t state)
1da177e4 1930{
4f7c39dc
TI		 1931 struct snd_pcm_runtime *runtime = substream->runtime;
1932 switch (runtime->status->state) {
1933 case SNDRV_PCM_STATE_OPEN:
1934 case SNDRV_PCM_STATE_DISCONNECTED:
1935 case SNDRV_PCM_STATE_SUSPENDED:
1936 return -EBADFD;
1937 }
1938 runtime->trigger_master = substream;
1da177e4
LT		 1939 return 0;
1940}
1941
cb639a42
TI		 1942static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream,
1943 snd_pcm_state_t state)
1da177e4 1944{
877211f5 1945 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1946 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1947 switch (runtime->status->state) {
1948 case SNDRV_PCM_STATE_PREPARED:
1949 /* start playback stream if possible */
1950 if (! snd_pcm_playback_empty(substream)) {
1951 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1952 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
70372a75
TI		 1953 } else {
1954 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1da177e4
LT		 1955 }
1956 break;
1957 case SNDRV_PCM_STATE_RUNNING:
1958 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1959 break;
4f7c39dc
TI		 1960 case SNDRV_PCM_STATE_XRUN:
1961 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1962 break;
1da177e4
LT		 1963 default:
1964 break;
1965 }
1966 } else {
1967 /* stop running stream */
1968 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
cb639a42
TI		 1969 snd_pcm_state_t new_state;
1970
1971 new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1972 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1973 snd_pcm_do_stop(substream, new_state);
1974 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1975 }
1976 }
48d88297
LY		 1977
1978 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1979 runtime->trigger_master == substream &&
1980 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1981 return substream->ops->trigger(substream,
1982 SNDRV_PCM_TRIGGER_DRAIN);
1983
1da177e4
LT		 1984 return 0;
1985}
1986
cb639a42
TI		 1987static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream,
1988 snd_pcm_state_t state)
1da177e4
LT		 1989{
1990}
1991
b17154cf 1992static const struct action_ops snd_pcm_action_drain_init = {
1da177e4
LT		 1993 .pre_action = snd_pcm_pre_drain_init,
1994 .do_action = snd_pcm_do_drain_init,
1995 .post_action = snd_pcm_post_drain_init
1996};
1997
1da177e4
LT		 1998/*
1999 * Drain the stream(s).
2000 * When the substream is linked, sync until the draining of all playback streams
2001 * is finished.
2002 * After this call, all streams are supposed to be either SETUP or DRAINING
2003 * (capture only) state.
2004 */
4cdc115f
TI		 2005static int snd_pcm_drain(struct snd_pcm_substream *substream,
2006 struct file *file)
1da177e4 2007{
877211f5
TI		 2008 struct snd_card *card;
2009 struct snd_pcm_runtime *runtime;
ef991b95 2010 struct snd_pcm_substream *s;
f57f3df0 2011 struct snd_pcm_group *group;
ac6424b9 2012 wait_queue_entry_t wait;
1da177e4 2013 int result = 0;
4cdc115f 2014 int nonblock = 0;
1da177e4 2015
1da177e4
LT		 2016 card = substream->pcm->card;
2017 runtime = substream->runtime;
2018
2019 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2020 return -EBADFD;
2021
4cdc115f
TI		 2022 if (file) {
2023 if (file->f_flags & O_NONBLOCK)
2024 nonblock = 1;
2025 } else if (substream->f_flags & O_NONBLOCK)
2026 nonblock = 1;
2027
21cb2a2e
TI		 2028 snd_pcm_stream_lock_irq(substream);
2029 /* resume pause */
d3a7dcfe 2030 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
cb639a42 2031 snd_pcm_pause(substream, false);
21cb2a2e
TI		 2032
2033 /* pre-start/stop - all running streams are changed to DRAINING state */
cb639a42
TI		 2034 result = snd_pcm_action(&snd_pcm_action_drain_init, substream,
2035 ACTION_ARG_IGNORE);
4cdc115f
TI		 2036 if (result < 0)
2037 goto unlock;
2038 /* in non-blocking, we don't wait in ioctl but let caller poll */
2039 if (nonblock) {
2040 result = -EAGAIN;
2041 goto unlock;
21cb2a2e 2042 }
1da177e4
LT		 2043
2044 for (;;) {
2045 long tout;
d3a7dcfe 2046 struct snd_pcm_runtime *to_check;
1da177e4
LT		 2047 if (signal_pending(current)) {
2048 result = -ERESTARTSYS;
2049 break;
2050 }
d3a7dcfe
TI		 2051 /* find a substream to drain */
2052 to_check = NULL;
f57f3df0 2053 group = snd_pcm_stream_group_ref(substream);
d3a7dcfe
TI		 2054 snd_pcm_group_for_each_entry(s, substream) {
2055 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
2056 continue;
2057 runtime = s->runtime;
2058 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
2059 to_check = runtime;
21cb2a2e 2060 break;
d3a7dcfe 2061 }
21cb2a2e 2062 }
f57f3df0 2063 snd_pcm_group_unref(group, substream);
d3a7dcfe
TI		 2064 if (!to_check)
2065 break; /* all drained */
2066 init_waitqueue_entry(&wait, current);
37151a41 2067 set_current_state(TASK_INTERRUPTIBLE);
d3a7dcfe 2068 add_wait_queue(&to_check->sleep, &wait);
1da177e4 2069 snd_pcm_stream_unlock_irq(substream);
f2b3614c
TI		 2070 if (runtime->no_period_wakeup)
2071 tout = MAX_SCHEDULE_TIMEOUT;
2072 else {
2073 tout = 10;
2074 if (runtime->rate) {
2075 long t = runtime->period_size * 2 / runtime->rate;
2076 tout = max(t, tout);
2077 }
2078 tout = msecs_to_jiffies(tout * 1000);
2079 }
37151a41 2080 tout = schedule_timeout(tout);
f57f3df0 2081
1da177e4 2082 snd_pcm_stream_lock_irq(substream);
f57f3df0
TI		 2083 group = snd_pcm_stream_group_ref(substream);
2084 snd_pcm_group_for_each_entry(s, substream) {
2085 if (s->runtime == to_check) {
2086 remove_wait_queue(&to_check->sleep, &wait);
2087 break;
2088 }
2089 }
2090 snd_pcm_group_unref(group, substream);
2091
0914f796
TI		 2092 if (card->shutdown) {
2093 result = -ENODEV;
2094 break;
2095 }
1da177e4
LT		 2096 if (tout == 0) {
2097 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
2098 result = -ESTRPIPE;
2099 else {
09e56df8
TI		 2100 dev_dbg(substream->pcm->card->dev,
2101 "playback drain error (DMA or IRQ trouble?)\n");
1da177e4
LT		 2102 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
2103 result = -EIO;
2104 }
2105 break;
2106 }
1da177e4 2107 }
21cb2a2e 2108
4cdc115f 2109 unlock:
21cb2a2e 2110 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 2111
2112 return result;
2113}
2114
2115/*
2116 * drop ioctl
2117 *
2118 * Immediately put all linked substreams into SETUP state.
2119 */
877211f5 2120static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 2121{
877211f5 2122 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2123 int result = 0;
2124
7eaa943c
TI		 2125 if (PCM_RUNTIME_CHECK(substream))
2126 return -ENXIO;
1da177e4 2127 runtime = substream->runtime;
1da177e4 2128
de1b8b93 2129 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
4b95ff78 2130 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 2131 return -EBADFD;
2132
1da177e4
LT		 2133 snd_pcm_stream_lock_irq(substream);
2134 /* resume pause */
2135 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
cb639a42 2136 snd_pcm_pause(substream, false);
1da177e4
LT		 2137
2138 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
2139 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
2140 snd_pcm_stream_unlock_irq(substream);
24e8fc49 2141
1da177e4
LT		 2142 return result;
2143}
2144
2145
0888c321 2146static bool is_pcm_file(struct file *file)
1da177e4 2147{
0888c321 2148 struct inode *inode = file_inode(file);
d819fb21 2149 struct snd_pcm *pcm;
f87135f5
CL		 2150 unsigned int minor;
2151
0888c321
AV		 2152 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
2153 return false;
1da177e4 2154 minor = iminor(inode);
d819fb21
TI		 2155 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2156 if (!pcm)
2157 pcm = snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2158 if (!pcm)
2159 return false;
2160 snd_card_unref(pcm->card);
2161 return true;
1da177e4
LT		 2162}
2163
2164/*
2165 * PCM link handling
2166 */
877211f5 2167static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 2168{
2169 int res = 0;
877211f5
TI		 2170 struct snd_pcm_file *pcm_file;
2171 struct snd_pcm_substream *substream1;
f57f3df0
TI		 2172 struct snd_pcm_group *group, *target_group;
2173 bool nonatomic = substream->pcm->nonatomic;
0888c321 2174 struct fd f = fdget(fd);
1da177e4 2175
0888c321 2176 if (!f.file)
1da177e4 2177 return -EBADFD;
0888c321
AV		 2178 if (!is_pcm_file(f.file)) {
2179 res = -EBADFD;
2180 goto _badf;
2181 }
2182 pcm_file = f.file->private_data;
1da177e4 2183 substream1 = pcm_file->substream;
951e2736
MM		 2184
2185 if (substream == substream1) {
2186 res = -EINVAL;
2187 goto _badf;
2188 }
2189
73365cb1 2190 group = kzalloc(sizeof(*group), GFP_KERNEL);
1662591b
TI		 2191 if (!group) {
2192 res = -ENOMEM;
2193 goto _nolock;
2194 }
73365cb1 2195 snd_pcm_group_init(group);
f57f3df0 2196
ecb41f0f 2197 down_write(&snd_pcm_link_rwsem);
1da177e4 2198 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
257f8cce
TI		 2199 substream->runtime->status->state != substream1->runtime->status->state ||
2200 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1da177e4
LT		 2201 res = -EBADFD;
2202 goto _end;
2203 }
2204 if (snd_pcm_stream_linked(substream1)) {
2205 res = -EALREADY;
2206 goto _end;
2207 }
f57f3df0
TI		 2208
2209 snd_pcm_stream_lock_irq(substream);
1da177e4 2210 if (!snd_pcm_stream_linked(substream)) {
a41c4cb9 2211 snd_pcm_group_assign(substream, group);
f57f3df0 2212 group = NULL; /* assigned, don't free this one below */
1da177e4 2213 }
f57f3df0
TI		 2214 target_group = substream->group;
2215 snd_pcm_stream_unlock_irq(substream);
2216
2217 snd_pcm_group_lock_irq(target_group, nonatomic);
e18035cf 2218 snd_pcm_stream_lock_nested(substream1);
f57f3df0 2219 snd_pcm_group_assign(substream1, target_group);
0e279dce 2220 refcount_inc(&target_group->refs);
f57f3df0
TI		 2221 snd_pcm_stream_unlock(substream1);
2222 snd_pcm_group_unlock_irq(target_group, nonatomic);
1da177e4 2223 _end:
1da177e4 2224 up_write(&snd_pcm_link_rwsem);
1662591b 2225 _nolock:
dd6c5cd8 2226 kfree(group);
0888c321
AV		 2227 _badf:
2228 fdput(f);
1da177e4
LT		 2229 return res;
2230}
2231
877211f5 2232static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4 2233{
e18035cf 2234 snd_pcm_stream_lock_nested(substream);
a41c4cb9 2235 snd_pcm_group_assign(substream, &substream->self_group);
f57f3df0 2236 snd_pcm_stream_unlock(substream);
1da177e4
LT		 2237}
2238
877211f5 2239static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 2240{
a41c4cb9 2241 struct snd_pcm_group *group;
f57f3df0
TI		 2242 bool nonatomic = substream->pcm->nonatomic;
2243 bool do_free = false;
1da177e4
LT		 2244 int res = 0;
2245
ecb41f0f 2246 down_write(&snd_pcm_link_rwsem);
f57f3df0 2247
1da177e4
LT		 2248 if (!snd_pcm_stream_linked(substream)) {
2249 res = -EALREADY;
2250 goto _end;
2251 }
a41c4cb9
TI		 2252
2253 group = substream->group;
f57f3df0 2254 snd_pcm_group_lock_irq(group, nonatomic);
a41c4cb9 2255
1da177e4 2256 relink_to_local(substream);
0e279dce 2257 refcount_dec(&group->refs);
a41c4cb9
TI		 2258
2259 /* detach the last stream, too */
2260 if (list_is_singular(&group->substreams)) {
7df5a5f6
TI		 2261 relink_to_local(list_first_entry(&group->substreams,
2262 struct snd_pcm_substream,
2263 link_list));
0e279dce 2264 do_free = refcount_dec_and_test(&group->refs);
1da177e4 2265 }
a41c4cb9 2266
f57f3df0
TI		 2267 snd_pcm_group_unlock_irq(group, nonatomic);
2268 if (do_free)
2269 kfree(group);
2270
1da177e4 2271 _end:
1da177e4
LT		 2272 up_write(&snd_pcm_link_rwsem);
2273 return res;
2274}
2275
2276/*
2277 * hw configurator
2278 */
877211f5
TI		 2279static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
2280 struct snd_pcm_hw_rule *rule)
1da177e4 2281{
877211f5 2282 struct snd_interval t;
1da177e4
LT		 2283 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
2284 hw_param_interval_c(params, rule->deps[1]), &t);
2285 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2286}
2287
877211f5
TI		 2288static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
2289 struct snd_pcm_hw_rule *rule)
1da177e4 2290{
877211f5 2291 struct snd_interval t;
1da177e4
LT		 2292 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
2293 hw_param_interval_c(params, rule->deps[1]), &t);
2294 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2295}
2296
877211f5
TI		 2297static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
2298 struct snd_pcm_hw_rule *rule)
1da177e4 2299{
877211f5 2300 struct snd_interval t;
1da177e4
LT		 2301 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
2302 hw_param_interval_c(params, rule->deps[1]),
2303 (unsigned long) rule->private, &t);
2304 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2305}
2306
877211f5
TI		 2307static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
2308 struct snd_pcm_hw_rule *rule)
1da177e4 2309{
877211f5 2310 struct snd_interval t;
1da177e4
LT		 2311 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
2312 (unsigned long) rule->private,
2313 hw_param_interval_c(params, rule->deps[1]), &t);
2314 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2315}
2316
877211f5
TI		 2317static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
2318 struct snd_pcm_hw_rule *rule)
1da177e4 2319{
ba71d227 2320 snd_pcm_format_t k;
b55f9fdc
TS		 2321 const struct snd_interval *i =
2322 hw_param_interval_c(params, rule->deps[0]);
877211f5
TI		 2323 struct snd_mask m;
2324 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4 2325 snd_mask_any(&m);
ba71d227 2326 pcm_for_each_format(k) {
1da177e4 2327 int bits;
ba71d227 2328 if (!snd_mask_test_format(mask, k))
1da177e4
LT		 2329 continue;
2330 bits = snd_pcm_format_physical_width(k);
2331 if (bits <= 0)
2332 continue; /* ignore invalid formats */
2333 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
ba71d227 2334 snd_mask_reset(&m, (__force unsigned)k);
1da177e4
LT		 2335 }
2336 return snd_mask_refine(mask, &m);
2337}
2338
877211f5
TI		 2339static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
2340 struct snd_pcm_hw_rule *rule)
1da177e4 2341{
877211f5 2342 struct snd_interval t;
ba71d227
TI		 2343 snd_pcm_format_t k;
2344
1da177e4
LT		 2345 t.min = UINT_MAX;
2346 t.max = 0;
2347 t.openmin = 0;
2348 t.openmax = 0;
ba71d227 2349 pcm_for_each_format(k) {
1da177e4 2350 int bits;
ba71d227 2351 if (!snd_mask_test_format(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1da177e4
LT		 2352 continue;
2353 bits = snd_pcm_format_physical_width(k);
2354 if (bits <= 0)
2355 continue; /* ignore invalid formats */
2356 if (t.min > (unsigned)bits)
2357 t.min = bits;
2358 if (t.max < (unsigned)bits)
2359 t.max = bits;
2360 }
2361 t.integer = 1;
2362 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2363}
2364
2365#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
2366#error "Change this table"
2367#endif
2368
8b674308
TS		 2369static const unsigned int rates[] = {
2370 5512, 8000, 11025, 16000, 22050, 32000, 44100,
4cc4531c 2371 48000, 64000, 88200, 96000, 176400, 192000, 352800, 384000
8b674308 2372};
1da177e4 2373
7653d557
CL		 2374const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
2375 .count = ARRAY_SIZE(rates),
2376 .list = rates,
2377};
2378
877211f5
TI		 2379static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
2380 struct snd_pcm_hw_rule *rule)
1da177e4 2381{
877211f5 2382 struct snd_pcm_hardware *hw = rule->private;
1da177e4 2383 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 2384 snd_pcm_known_rates.count,
2385 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 2386}
2387
877211f5
TI		 2388static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2389 struct snd_pcm_hw_rule *rule)
1da177e4 2390{
877211f5
TI		 2391 struct snd_interval t;
2392 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 2393 t.min = 0;
2394 t.max = substream->buffer_bytes_max;
2395 t.openmin = 0;
2396 t.openmax = 0;
2397 t.integer = 1;
2398 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2399}
2400
d662117c 2401static int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 2402{
877211f5
TI		 2403 struct snd_pcm_runtime *runtime = substream->runtime;
2404 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 2405 int k, err;
2406
2407 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2408 snd_mask_any(constrs_mask(constrs, k));
2409 }
2410
2411 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2412 snd_interval_any(constrs_interval(constrs, k));
2413 }
2414
2415 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2416 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2417 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2418 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2419 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2420
2421 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2422 snd_pcm_hw_rule_format, NULL,
2423 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2424 if (err < 0)
2425 return err;
2426 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2427 snd_pcm_hw_rule_sample_bits, NULL,
2428 SNDRV_PCM_HW_PARAM_FORMAT,
2429 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2430 if (err < 0)
2431 return err;
2432 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2433 snd_pcm_hw_rule_div, NULL,
2434 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2435 if (err < 0)
2436 return err;
2437 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2438 snd_pcm_hw_rule_mul, NULL,
2439 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2440 if (err < 0)
2441 return err;
2442 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2443 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2444 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2445 if (err < 0)
2446 return err;
2447 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2448 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2449 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2450 if (err < 0)
2451 return err;
2452 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2453 snd_pcm_hw_rule_div, NULL,
2454 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2455 if (err < 0)
2456 return err;
2457 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2458 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2459 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2460 if (err < 0)
2461 return err;
2462 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2463 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2464 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2465 if (err < 0)
2466 return err;
2467 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2468 snd_pcm_hw_rule_div, NULL,
2469 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2470 if (err < 0)
2471 return err;
2472 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2473 snd_pcm_hw_rule_div, NULL,
2474 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2475 if (err < 0)
2476 return err;
2477 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2478 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2479 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2480 if (err < 0)
2481 return err;
2482 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2483 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2484 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2485 if (err < 0)
2486 return err;
2487 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2488 snd_pcm_hw_rule_mul, NULL,
2489 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2490 if (err < 0)
2491 return err;
2492 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2493 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2494 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2495 if (err < 0)
2496 return err;
2497 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2498 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2499 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2500 if (err < 0)
2501 return err;
2502 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2503 snd_pcm_hw_rule_muldivk, (void*) 8,
2504 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2505 if (err < 0)
2506 return err;
2507 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2508 snd_pcm_hw_rule_muldivk, (void*) 8,
2509 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2510 if (err < 0)
2511 return err;
2512 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2513 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2514 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2515 if (err < 0)
2516 return err;
2517 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2518 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2519 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2520 if (err < 0)
2521 return err;
2522 return 0;
2523}
2524
d662117c 2525static int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 2526{
877211f5
TI		 2527 struct snd_pcm_runtime *runtime = substream->runtime;
2528 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 2529 int err;
2530 unsigned int mask = 0;
2531
2532 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
f9b0c053 2533 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_RW_INTERLEAVED);
1da177e4 2534 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
f9b0c053 2535 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
63825f3a 2536 if (hw_support_mmap(substream)) {
1da177e4 2537 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
f9b0c053 2538 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
1da177e4 2539 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
f9b0c053 2540 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED);
1da177e4 2541 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
f9b0c053 2542 mask |= PARAM_MASK_BIT(SNDRV_PCM_ACCESS_MMAP_COMPLEX);
1da177e4
LT		 2543 }
2544 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 2545 if (err < 0)
2546 return err;
1da177e4
LT		 2547
2548 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 2549 if (err < 0)
2550 return err;
1da177e4 2551
f9b0c053
TI		 2552 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT,
2553 PARAM_MASK_BIT(SNDRV_PCM_SUBFORMAT_STD));
7eaa943c
TI		 2554 if (err < 0)
2555 return err;
1da177e4
LT		 2556
2557 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2558 hw->channels_min, hw->channels_max);
7eaa943c
TI		 2559 if (err < 0)
2560 return err;
1da177e4
LT		 2561
2562 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2563 hw->rate_min, hw->rate_max);
8b90ca08
GL		 2564 if (err < 0)
2565 return err;
1da177e4
LT		 2566
2567 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2568 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 2569 if (err < 0)
2570 return err;
1da177e4
LT		 2571
2572 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2573 hw->periods_min, hw->periods_max);
7eaa943c
TI		 2574 if (err < 0)
2575 return err;
1da177e4
LT		 2576
2577 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2578 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 2579 if (err < 0)
2580 return err;
1da177e4
LT		 2581
2582 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2583 snd_pcm_hw_rule_buffer_bytes_max, substream,
2584 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2585 if (err < 0)
2586 return err;
2587
2588 /* FIXME: remove */
2589 if (runtime->dma_bytes) {
2590 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c 2591 if (err < 0)
6cf95152 2592 return err;
1da177e4
LT		 2593 }
2594
2595 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2596 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2597 snd_pcm_hw_rule_rate, hw,
2598 SNDRV_PCM_HW_PARAM_RATE, -1);
2599 if (err < 0)
2600 return err;
2601 }
2602
2603 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2604 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2605
2606 return 0;
2607}
2608
3bf75f9b 2609static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2610{
b51abed8
TI		 2611 if (snd_pcm_stream_linked(substream))
2612 snd_pcm_unlink(substream);
3bf75f9b
TI		 2613}
2614
2615void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2616{
0df63e44
TI		 2617 substream->ref_count--;
2618 if (substream->ref_count > 0)
2619 return;
2620
3bf75f9b 2621 snd_pcm_drop(substream);
3bf75f9b 2622 if (substream->hw_opened) {
0fbb027b
TI		 2623 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
2624 do_hw_free(substream);
1da177e4 2625 substream->ops->close(substream);
3bf75f9b 2626 substream->hw_opened = 0;
1da177e4 2627 }
5371a79b
RW		 2628 if (cpu_latency_qos_request_active(&substream->latency_pm_qos_req))
2629 cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2630 if (substream->pcm_release) {
2631 substream->pcm_release(substream);
2632 substream->pcm_release = NULL;
2633 }
3bf75f9b
TI		 2634 snd_pcm_detach_substream(substream);
2635}
e88e8ae6
TI		 2636EXPORT_SYMBOL(snd_pcm_release_substream);
2637
3bf75f9b
TI		 2638int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2639 struct file *file,
2640 struct snd_pcm_substream **rsubstream)
2641{
2642 struct snd_pcm_substream *substream;
2643 int err;
2644
2645 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2646 if (err < 0)
2647 return err;
0df63e44
TI		 2648 if (substream->ref_count > 1) {
2649 *rsubstream = substream;
2650 return 0;
2651 }
2652
3bf75f9b
TI		 2653 err = snd_pcm_hw_constraints_init(substream);
2654 if (err < 0) {
09e56df8 2655 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
3bf75f9b
TI		 2656 goto error;
2657 }
2658
2659 if ((err = substream->ops->open(substream)) < 0)
2660 goto error;
2661
2662 substream->hw_opened = 1;
2663
2664 err = snd_pcm_hw_constraints_complete(substream);
2665 if (err < 0) {
09e56df8 2666 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
3bf75f9b
TI		 2667 goto error;
2668 }
2669
2670 *rsubstream = substream;
1da177e4 2671 return 0;
3bf75f9b
TI		 2672
2673 error:
2674 snd_pcm_release_substream(substream);
2675 return err;
1da177e4 2676}
e88e8ae6
TI		 2677EXPORT_SYMBOL(snd_pcm_open_substream);
2678
1da177e4 2679static int snd_pcm_open_file(struct file *file,
877211f5 2680 struct snd_pcm *pcm,
ffd3d5c6 2681 int stream)
1da177e4 2682{
877211f5
TI		 2683 struct snd_pcm_file *pcm_file;
2684 struct snd_pcm_substream *substream;
3bf75f9b 2685 int err;
1da177e4 2686
3bf75f9b
TI		 2687 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2688 if (err < 0)
2689 return err;
2690
548a648b
TI		 2691 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2692 if (pcm_file == NULL) {
2693 snd_pcm_release_substream(substream);
2694 return -ENOMEM;
2695 }
2696 pcm_file->substream = substream;
de89750c 2697 if (substream->ref_count == 1)
0df63e44 2698 substream->pcm_release = pcm_release_private;
1da177e4 2699 file->private_data = pcm_file;
ffd3d5c6 2700
1da177e4
LT		 2701 return 0;
2702}
2703
f87135f5
CL		 2704static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2705{
2706 struct snd_pcm *pcm;
02f4865f
TI		 2707 int err = nonseekable_open(inode, file);
2708 if (err < 0)
2709 return err;
f87135f5
CL		 2710 pcm = snd_lookup_minor_data(iminor(inode),
2711 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd 2712 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
8bb4d9ce
TI		 2713 if (pcm)
2714 snd_card_unref(pcm->card);
a0830dbd 2715 return err;
f87135f5
CL		 2716}
2717
2718static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2719{
877211f5 2720 struct snd_pcm *pcm;
02f4865f
TI		 2721 int err = nonseekable_open(inode, file);
2722 if (err < 0)
2723 return err;
f87135f5
CL		 2724 pcm = snd_lookup_minor_data(iminor(inode),
2725 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd 2726 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
8bb4d9ce
TI		 2727 if (pcm)
2728 snd_card_unref(pcm->card);
a0830dbd 2729 return err;
f87135f5
CL		 2730}
2731
2732static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2733{
2734 int err;
ac6424b9 2735 wait_queue_entry_t wait;
1da177e4 2736
1da177e4
LT		 2737 if (pcm == NULL) {
2738 err = -ENODEV;
2739 goto __error1;
2740 }
2741 err = snd_card_file_add(pcm->card, file);
2742 if (err < 0)
2743 goto __error1;
2744 if (!try_module_get(pcm->card->module)) {
2745 err = -EFAULT;
2746 goto __error2;
2747 }
2748 init_waitqueue_entry(&wait, current);
2749 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2750 mutex_lock(&pcm->open_mutex);
1da177e4 2751 while (1) {
ffd3d5c6 2752 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2753 if (err >= 0)
2754 break;
2755 if (err == -EAGAIN) {
2756 if (file->f_flags & O_NONBLOCK) {
2757 err = -EBUSY;
2758 break;
2759 }
2760 } else
2761 break;
2762 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2763 mutex_unlock(&pcm->open_mutex);
1da177e4 2764 schedule();
1a60d4c5 2765 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2766 if (pcm->card->shutdown) {
2767 err = -ENODEV;
2768 break;
2769 }
1da177e4
LT		 2770 if (signal_pending(current)) {
2771 err = -ERESTARTSYS;
2772 break;
2773 }
2774 }
2775 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2776 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2777 if (err < 0)
2778 goto __error;
2779 return err;
2780
2781 __error:
2782 module_put(pcm->card->module);
2783 __error2:
2784 snd_card_file_remove(pcm->card, file);
2785 __error1:
2786 return err;
2787}
2788
2789static int snd_pcm_release(struct inode *inode, struct file *file)
2790{
877211f5
TI		 2791 struct snd_pcm *pcm;
2792 struct snd_pcm_substream *substream;
2793 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2794
2795 pcm_file = file->private_data;
2796 substream = pcm_file->substream;
7eaa943c
TI		 2797 if (snd_BUG_ON(!substream))
2798 return -ENXIO;
1da177e4 2799 pcm = substream->pcm;
1a60d4c5 2800 mutex_lock(&pcm->open_mutex);
3bf75f9b 2801 snd_pcm_release_substream(substream);
548a648b 2802 kfree(pcm_file);
1a60d4c5 2803 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2804 wake_up(&pcm->open_wait);
2805 module_put(pcm->card->module);
2806 snd_card_file_remove(pcm->card, file);
2807 return 0;
2808}
2809
f839cc1c
TI		 2810/* check and update PCM state; return 0 or a negative error
2811 * call this inside PCM lock
2812 */
2813static int do_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2814{
f839cc1c 2815 switch (substream->runtime->status->state) {
1da177e4 2816 case SNDRV_PCM_STATE_DRAINING:
f839cc1c
TI		 2817 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2818 return -EBADFD;
c0dbbdad 2819 fallthrough;
f839cc1c
TI		 2820 case SNDRV_PCM_STATE_RUNNING:
2821 return snd_pcm_update_hw_ptr(substream);
2822 case SNDRV_PCM_STATE_PREPARED:
2823 case SNDRV_PCM_STATE_PAUSED:
2824 return 0;
51840409 2825 case SNDRV_PCM_STATE_SUSPENDED:
f839cc1c
TI		 2826 return -ESTRPIPE;
2827 case SNDRV_PCM_STATE_XRUN:
2828 return -EPIPE;
1da177e4 2829 default:
f839cc1c 2830 return -EBADFD;
1da177e4 2831 }
f839cc1c 2832}
1da177e4 2833
9027c463 2834/* increase the appl_ptr; returns the processed frames or a negative error */
e0327a0f
TI		 2835static snd_pcm_sframes_t forward_appl_ptr(struct snd_pcm_substream *substream,
2836 snd_pcm_uframes_t frames,
2837 snd_pcm_sframes_t avail)
2838{
2839 struct snd_pcm_runtime *runtime = substream->runtime;
2840 snd_pcm_sframes_t appl_ptr;
9027c463 2841 int ret;
e0327a0f
TI		 2842
2843 if (avail <= 0)
2844 return 0;
2845 if (frames > (snd_pcm_uframes_t)avail)
2846 frames = avail;
2847 appl_ptr = runtime->control->appl_ptr + frames;
2848 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2849 appl_ptr -= runtime->boundary;
66e01a5c 2850 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
9027c463 2851 return ret < 0 ? ret : frames;
e0327a0f
TI		 2852}
2853
fb51f1cd 2854/* decrease the appl_ptr; returns the processed frames or zero for error */
e0327a0f
TI		 2855static snd_pcm_sframes_t rewind_appl_ptr(struct snd_pcm_substream *substream,
2856 snd_pcm_uframes_t frames,
2857 snd_pcm_sframes_t avail)
2858{
2859 struct snd_pcm_runtime *runtime = substream->runtime;
2860 snd_pcm_sframes_t appl_ptr;
9027c463 2861 int ret;
e0327a0f
TI		 2862
2863 if (avail <= 0)
2864 return 0;
2865 if (frames > (snd_pcm_uframes_t)avail)
2866 frames = avail;
1da177e4
LT		 2867 appl_ptr = runtime->control->appl_ptr - frames;
2868 if (appl_ptr < 0)
2869 appl_ptr += runtime->boundary;
66e01a5c 2870 ret = pcm_lib_apply_appl_ptr(substream, appl_ptr);
fb51f1cd
TI		 2871 /* NOTE: we return zero for errors because PulseAudio gets depressed
2872 * upon receiving an error from rewind ioctl and stops processing
2873 * any longer. Returning zero means that no rewind is done, so
2874 * it's not absolutely wrong to answer like that.
2875 */
2876 return ret < 0 ? 0 : frames;
e0327a0f
TI		 2877}
2878
763e5067
TI		 2879static snd_pcm_sframes_t snd_pcm_rewind(struct snd_pcm_substream *substream,
2880 snd_pcm_uframes_t frames)
1da177e4 2881{
1da177e4 2882 snd_pcm_sframes_t ret;
1da177e4
LT		 2883
2884 if (frames == 0)
2885 return 0;
2886
2887 snd_pcm_stream_lock_irq(substream);
f839cc1c 2888 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2889 if (!ret)
2890 ret = rewind_appl_ptr(substream, frames,
763e5067 2891 snd_pcm_hw_avail(substream));
1da177e4
LT		 2892 snd_pcm_stream_unlock_irq(substream);
2893 return ret;
2894}
2895
763e5067
TI		 2896static snd_pcm_sframes_t snd_pcm_forward(struct snd_pcm_substream *substream,
2897 snd_pcm_uframes_t frames)
1da177e4 2898{
1da177e4 2899 snd_pcm_sframes_t ret;
1da177e4
LT		 2900
2901 if (frames == 0)
2902 return 0;
2903
2904 snd_pcm_stream_lock_irq(substream);
f839cc1c 2905 ret = do_pcm_hwsync(substream);
e0327a0f
TI		 2906 if (!ret)
2907 ret = forward_appl_ptr(substream, frames,
763e5067 2908 snd_pcm_avail(substream));
1da177e4
LT		 2909 snd_pcm_stream_unlock_irq(substream);
2910 return ret;
2911}
2912
877211f5 2913static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2914{
1da177e4
LT		 2915 int err;
2916
2917 snd_pcm_stream_lock_irq(substream);
f839cc1c 2918 err = do_pcm_hwsync(substream);
1da177e4
LT		 2919 snd_pcm_stream_unlock_irq(substream);
2920 return err;
2921}
2922
912e4c33
JM		 2923static int snd_pcm_delay(struct snd_pcm_substream *substream,
2924 snd_pcm_sframes_t *delay)
1da177e4 2925{
1da177e4
LT		 2926 int err;
2927 snd_pcm_sframes_t n = 0;
2928
2929 snd_pcm_stream_lock_irq(substream);
f839cc1c 2930 err = do_pcm_hwsync(substream);
c99c5a3b
TI		 2931 if (!err)
2932 n = snd_pcm_calc_delay(substream);
1da177e4 2933 snd_pcm_stream_unlock_irq(substream);
912e4c33
JM		 2934 if (!err)
2935 *delay = n;
2936 return err;
1da177e4
LT		 2937}
2938
877211f5
TI		 2939static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2940 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2941{
877211f5
TI		 2942 struct snd_pcm_runtime *runtime = substream->runtime;
2943 struct snd_pcm_sync_ptr sync_ptr;
2944 volatile struct snd_pcm_mmap_status *status;
2945 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2946 int err;
2947
2948 memset(&sync_ptr, 0, sizeof(sync_ptr));
2949 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2950 return -EFAULT;
877211f5 2951 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2952 return -EFAULT;
2953 status = runtime->status;
2954 control = runtime->control;
2955 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2956 err = snd_pcm_hwsync(substream);
2957 if (err < 0)
2958 return err;
2959 }
2960 snd_pcm_stream_lock_irq(substream);
9027c463 2961 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) {
66e01a5c
TS		 2962 err = pcm_lib_apply_appl_ptr(substream,
2963 sync_ptr.c.control.appl_ptr);
9027c463
TI		 2964 if (err < 0) {
2965 snd_pcm_stream_unlock_irq(substream);
2966 return err;
2967 }
2968 } else {
1da177e4 2969 sync_ptr.c.control.appl_ptr = control->appl_ptr;
9027c463 2970 }
1da177e4
LT		 2971 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2972 control->avail_min = sync_ptr.c.control.avail_min;
2973 else
2974 sync_ptr.c.control.avail_min = control->avail_min;
2975 sync_ptr.s.status.state = status->state;
2976 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2977 sync_ptr.s.status.tstamp = status->tstamp;
2978 sync_ptr.s.status.suspended_state = status->suspended_state;
f853dcaa 2979 sync_ptr.s.status.audio_tstamp = status->audio_tstamp;
1da177e4
LT		 2980 snd_pcm_stream_unlock_irq(substream);
2981 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2982 return -EFAULT;
2983 return 0;
2984}
b751eef1 2985
09d94175 2986struct snd_pcm_mmap_status32 {
cb639a42 2987 snd_pcm_state_t state;
09d94175
AB		 2988 s32 pad1;
2989 u32 hw_ptr;
80fe7430
AB		 2990 s32 tstamp_sec;
2991 s32 tstamp_nsec;
cb639a42 2992 snd_pcm_state_t suspended_state;
80fe7430
AB		 2993 s32 audio_tstamp_sec;
2994 s32 audio_tstamp_nsec;
09d94175
AB		 2995} __attribute__((packed));
2996
2997struct snd_pcm_mmap_control32 {
2998 u32 appl_ptr;
2999 u32 avail_min;
3000};
3001
3002struct snd_pcm_sync_ptr32 {
3003 u32 flags;
3004 union {
3005 struct snd_pcm_mmap_status32 status;
3006 unsigned char reserved[64];
3007 } s;
3008 union {
3009 struct snd_pcm_mmap_control32 control;
3010 unsigned char reserved[64];
3011 } c;
3012} __attribute__((packed));
3013
3014/* recalcuate the boundary within 32bit */
3015static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
3016{
3017 snd_pcm_uframes_t boundary;
3018
3019 if (! runtime->buffer_size)
3020 return 0;
3021 boundary = runtime->buffer_size;
3022 while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
3023 boundary *= 2;
3024 return boundary;
3025}
3026
3027static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
3028 struct snd_pcm_sync_ptr32 __user *src)
3029{
3030 struct snd_pcm_runtime *runtime = substream->runtime;
3031 volatile struct snd_pcm_mmap_status *status;
3032 volatile struct snd_pcm_mmap_control *control;
3033 u32 sflags;
3034 struct snd_pcm_mmap_control scontrol;
3035 struct snd_pcm_mmap_status sstatus;
3036 snd_pcm_uframes_t boundary;
3037 int err;
3038
3039 if (snd_BUG_ON(!runtime))
3040 return -EINVAL;
3041
3042 if (get_user(sflags, &src->flags) ||
3043 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
3044 get_user(scontrol.avail_min, &src->c.control.avail_min))
3045 return -EFAULT;
3046 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
3047 err = snd_pcm_hwsync(substream);
3048 if (err < 0)
3049 return err;
3050 }
3051 status = runtime->status;
3052 control = runtime->control;
3053 boundary = recalculate_boundary(runtime);
3054 if (! boundary)
3055 boundary = 0x7fffffff;
3056 snd_pcm_stream_lock_irq(substream);
3057 /* FIXME: we should consider the boundary for the sync from app */
3058 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
3059 control->appl_ptr = scontrol.appl_ptr;
3060 else
3061 scontrol.appl_ptr = control->appl_ptr % boundary;
3062 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
3063 control->avail_min = scontrol.avail_min;
3064 else
3065 scontrol.avail_min = control->avail_min;
3066 sstatus.state = status->state;
3067 sstatus.hw_ptr = status->hw_ptr % boundary;
3068 sstatus.tstamp = status->tstamp;
3069 sstatus.suspended_state = status->suspended_state;
3070 sstatus.audio_tstamp = status->audio_tstamp;
3071 snd_pcm_stream_unlock_irq(substream);
3072 if (put_user(sstatus.state, &src->s.status.state) ||
3073 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
80fe7430
AB		 3074 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp_sec) ||
3075 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp_nsec) ||
09d94175 3076 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
80fe7430
AB		 3077 put_user(sstatus.audio_tstamp.tv_sec, &src->s.status.audio_tstamp_sec) ||
3078 put_user(sstatus.audio_tstamp.tv_nsec, &src->s.status.audio_tstamp_nsec) ||
09d94175
AB		 3079 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
3080 put_user(scontrol.avail_min, &src->c.control.avail_min))
3081 return -EFAULT;
3082
3083 return 0;
3084}
80fe7430 3085#define __SNDRV_PCM_IOCTL_SYNC_PTR32 _IOWR('A', 0x23, struct snd_pcm_sync_ptr32)
09d94175 3086
b751eef1
JK		 3087static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
3088{
3089 struct snd_pcm_runtime *runtime = substream->runtime;
3090 int arg;
3091
3092 if (get_user(arg, _arg))
3093 return -EFAULT;
3094 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
3095 return -EINVAL;
2408c219 3096 runtime->tstamp_type = arg;
b751eef1
JK		 3097 return 0;
3098}
67616fed
TI		 3099
3100static int snd_pcm_xferi_frames_ioctl(struct snd_pcm_substream *substream,
3101 struct snd_xferi __user *_xferi)
3102{
3103 struct snd_xferi xferi;
3104 struct snd_pcm_runtime *runtime = substream->runtime;
3105 snd_pcm_sframes_t result;
3106
3107 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3108 return -EBADFD;
3109 if (put_user(0, &_xferi->result))
3110 return -EFAULT;
3111 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
3112 return -EFAULT;
3113 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3114 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
3115 else
3116 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
ebe6976d
AV		 3117 if (put_user(result, &_xferi->result))
3118 return -EFAULT;
67616fed
TI		 3119 return result < 0 ? result : 0;
3120}
3121
3122static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
3123 struct snd_xfern __user *_xfern)
3124{
3125 struct snd_xfern xfern;
3126 struct snd_pcm_runtime *runtime = substream->runtime;
3127 void *bufs;
3128 snd_pcm_sframes_t result;
3129
3130 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3131 return -EBADFD;
3132 if (runtime->channels > 128)
3133 return -EINVAL;
3134 if (put_user(0, &_xfern->result))
3135 return -EFAULT;
3136 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
3137 return -EFAULT;
3138
3139 bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
3140 if (IS_ERR(bufs))
3141 return PTR_ERR(bufs);
3142 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3143 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
3144 else
3145 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
3146 kfree(bufs);
ebe6976d
AV		 3147 if (put_user(result, &_xfern->result))
3148 return -EFAULT;
67616fed
TI		 3149 return result < 0 ? result : 0;
3150}
3151
3152static int snd_pcm_rewind_ioctl(struct snd_pcm_substream *substream,
3153 snd_pcm_uframes_t __user *_frames)
3154{
3155 snd_pcm_uframes_t frames;
3156 snd_pcm_sframes_t result;
3157
3158 if (get_user(frames, _frames))
3159 return -EFAULT;
3160 if (put_user(0, _frames))
3161 return -EFAULT;
763e5067 3162 result = snd_pcm_rewind(substream, frames);
ebe6976d
AV		 3163 if (put_user(result, _frames))
3164 return -EFAULT;
67616fed
TI		 3165 return result < 0 ? result : 0;
3166}
3167
3168static int snd_pcm_forward_ioctl(struct snd_pcm_substream *substream,
3169 snd_pcm_uframes_t __user *_frames)
3170{
3171 snd_pcm_uframes_t frames;
3172 snd_pcm_sframes_t result;
3173
3174 if (get_user(frames, _frames))
3175 return -EFAULT;
3176 if (put_user(0, _frames))
3177 return -EFAULT;
763e5067 3178 result = snd_pcm_forward(substream, frames);
ebe6976d
AV		 3179 if (put_user(result, _frames))
3180 return -EFAULT;
67616fed
TI		 3181 return result < 0 ? result : 0;
3182}
3183
3184static int snd_pcm_common_ioctl(struct file *file,
0df63e44 3185 struct snd_pcm_substream *substream,
1da177e4
LT		 3186 unsigned int cmd, void __user *arg)
3187{
4b671f57 3188 struct snd_pcm_file *pcm_file = file->private_data;
7d8e8292
TI		 3189 int res;
3190
67616fed
TI		 3191 if (PCM_RUNTIME_CHECK(substream))
3192 return -ENXIO;
3193
7d8e8292
TI		 3194 res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0);
3195 if (res < 0)
3196 return res;
4b671f57 3197
1da177e4
LT		 3198 switch (cmd) {
3199 case SNDRV_PCM_IOCTL_PVERSION:
3200 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
3201 case SNDRV_PCM_IOCTL_INFO:
3202 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 3203 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
3204 return 0;
b751eef1
JK		 3205 case SNDRV_PCM_IOCTL_TTSTAMP:
3206 return snd_pcm_tstamp(substream, arg);
4b671f57
TI		 3207 case SNDRV_PCM_IOCTL_USER_PVERSION:
3208 if (get_user(pcm_file->user_pversion,
3209 (unsigned int __user *)arg))
3210 return -EFAULT;
3211 return 0;
1da177e4
LT		 3212 case SNDRV_PCM_IOCTL_HW_REFINE:
3213 return snd_pcm_hw_refine_user(substream, arg);
3214 case SNDRV_PCM_IOCTL_HW_PARAMS:
3215 return snd_pcm_hw_params_user(substream, arg);
3216 case SNDRV_PCM_IOCTL_HW_FREE:
3217 return snd_pcm_hw_free(substream);
3218 case SNDRV_PCM_IOCTL_SW_PARAMS:
3219 return snd_pcm_sw_params_user(substream, arg);
3ddee7f8
BW		 3220 case SNDRV_PCM_IOCTL_STATUS32:
3221 return snd_pcm_status_user32(substream, arg, false);
3222 case SNDRV_PCM_IOCTL_STATUS_EXT32:
3223 return snd_pcm_status_user32(substream, arg, true);
3224 case SNDRV_PCM_IOCTL_STATUS64:
3225 return snd_pcm_status_user64(substream, arg, false);
3226 case SNDRV_PCM_IOCTL_STATUS_EXT64:
3227 return snd_pcm_status_user64(substream, arg, true);
1da177e4
LT		 3228 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
3229 return snd_pcm_channel_info_user(substream, arg);
3230 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 3231 return snd_pcm_prepare(substream, file);
1da177e4
LT		 3232 case SNDRV_PCM_IOCTL_RESET:
3233 return snd_pcm_reset(substream);
3234 case SNDRV_PCM_IOCTL_START:
c2c86a97 3235 return snd_pcm_start_lock_irq(substream);
1da177e4
LT		 3236 case SNDRV_PCM_IOCTL_LINK:
3237 return snd_pcm_link(substream, (int)(unsigned long) arg);
3238 case SNDRV_PCM_IOCTL_UNLINK:
3239 return snd_pcm_unlink(substream);
3240 case SNDRV_PCM_IOCTL_RESUME:
3241 return snd_pcm_resume(substream);
3242 case SNDRV_PCM_IOCTL_XRUN:
3243 return snd_pcm_xrun(substream);
3244 case SNDRV_PCM_IOCTL_HWSYNC:
3245 return snd_pcm_hwsync(substream);
3246 case SNDRV_PCM_IOCTL_DELAY:
c2c86a97 3247 {
912e4c33 3248 snd_pcm_sframes_t delay;
c2c86a97 3249 snd_pcm_sframes_t __user *res = arg;
912e4c33 3250 int err;
c2c86a97 3251
912e4c33
JM		 3252 err = snd_pcm_delay(substream, &delay);
3253 if (err)
3254 return err;
c2c86a97
TI		 3255 if (put_user(delay, res))
3256 return -EFAULT;
3257 return 0;
3258 }
80fe7430
AB		 3259 case __SNDRV_PCM_IOCTL_SYNC_PTR32:
3260 return snd_pcm_ioctl_sync_ptr_compat(substream, arg);
3261 case __SNDRV_PCM_IOCTL_SYNC_PTR64:
1da177e4 3262 return snd_pcm_sync_ptr(substream, arg);
59d48582 3263#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3264 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
3265 return snd_pcm_hw_refine_old_user(substream, arg);
3266 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
3267 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 3268#endif
1da177e4 3269 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 3270 return snd_pcm_drain(substream, file);
1da177e4
LT		 3271 case SNDRV_PCM_IOCTL_DROP:
3272 return snd_pcm_drop(substream);
e661d0dd 3273 case SNDRV_PCM_IOCTL_PAUSE:
cb639a42 3274 return snd_pcm_pause_lock_irq(substream, (unsigned long)arg);
1da177e4 3275 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
1da177e4 3276 case SNDRV_PCM_IOCTL_READI_FRAMES:
67616fed
TI		 3277 return snd_pcm_xferi_frames_ioctl(substream, arg);
3278 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
1da177e4 3279 case SNDRV_PCM_IOCTL_READN_FRAMES:
67616fed 3280 return snd_pcm_xfern_frames_ioctl(substream, arg);
1da177e4 3281 case SNDRV_PCM_IOCTL_REWIND:
67616fed 3282 return snd_pcm_rewind_ioctl(substream, arg);
1da177e4 3283 case SNDRV_PCM_IOCTL_FORWARD:
67616fed 3284 return snd_pcm_forward_ioctl(substream, arg);
1da177e4 3285 }
67616fed
TI		 3286 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
3287 return -ENOTTY;
1da177e4
LT		 3288}
3289
67616fed
TI		 3290static long snd_pcm_ioctl(struct file *file, unsigned int cmd,
3291 unsigned long arg)
1da177e4 3292{
877211f5 3293 struct snd_pcm_file *pcm_file;
1da177e4
LT		 3294
3295 pcm_file = file->private_data;
3296
3297 if (((cmd >> 8) & 0xff) != 'A')
3298 return -ENOTTY;
3299
67616fed
TI		 3300 return snd_pcm_common_ioctl(file, pcm_file->substream, cmd,
3301 (void __user *)arg);
1da177e4
LT		 3302}
3303
c2c86a97
TI		 3304/**
3305 * snd_pcm_kernel_ioctl - Execute PCM ioctl in the kernel-space
3306 * @substream: PCM substream
3307 * @cmd: IOCTL cmd
3308 * @arg: IOCTL argument
3309 *
3310 * The function is provided primarily for OSS layer and USB gadget drivers,
3311 * and it allows only the limited set of ioctls (hw_params, sw_params,
3312 * prepare, start, drain, drop, forward).
3313 */
bf1bbb5a
TI		 3314int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
3315 unsigned int cmd, void *arg)
1da177e4 3316{
c2c86a97
TI		 3317 snd_pcm_uframes_t *frames = arg;
3318 snd_pcm_sframes_t result;
1da177e4 3319
c2c86a97
TI		 3320 switch (cmd) {
3321 case SNDRV_PCM_IOCTL_FORWARD:
3322 {
3323 /* provided only for OSS; capture-only and no value returned */
3324 if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
3325 return -EINVAL;
763e5067 3326 result = snd_pcm_forward(substream, *frames);
c2c86a97
TI		 3327 return result < 0 ? result : 0;
3328 }
3329 case SNDRV_PCM_IOCTL_HW_PARAMS:
3330 return snd_pcm_hw_params(substream, arg);
3331 case SNDRV_PCM_IOCTL_SW_PARAMS:
3332 return snd_pcm_sw_params(substream, arg);
3333 case SNDRV_PCM_IOCTL_PREPARE:
3334 return snd_pcm_prepare(substream, NULL);
3335 case SNDRV_PCM_IOCTL_START:
3336 return snd_pcm_start_lock_irq(substream);
3337 case SNDRV_PCM_IOCTL_DRAIN:
7d8e8292 3338 return snd_pcm_drain(substream, NULL);
c2c86a97
TI		 3339 case SNDRV_PCM_IOCTL_DROP:
3340 return snd_pcm_drop(substream);
3341 case SNDRV_PCM_IOCTL_DELAY:
912e4c33 3342 return snd_pcm_delay(substream, frames);
1da177e4 3343 default:
c2c86a97 3344 return -EINVAL;
1da177e4
LT		 3345 }
3346}
e88e8ae6
TI		 3347EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3348
877211f5
TI		 3349static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3350 loff_t * offset)
1da177e4 3351{
877211f5
TI		 3352 struct snd_pcm_file *pcm_file;
3353 struct snd_pcm_substream *substream;
3354 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3355 snd_pcm_sframes_t result;
3356
3357 pcm_file = file->private_data;
3358 substream = pcm_file->substream;
7eaa943c
TI		 3359 if (PCM_RUNTIME_CHECK(substream))
3360 return -ENXIO;
1da177e4
LT		 3361 runtime = substream->runtime;
3362 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3363 return -EBADFD;
3364 if (!frame_aligned(runtime, count))
3365 return -EINVAL;
3366 count = bytes_to_frames(runtime, count);
3367 result = snd_pcm_lib_read(substream, buf, count);
3368 if (result > 0)
3369 result = frames_to_bytes(runtime, result);
3370 return result;
3371}
3372
877211f5
TI		 3373static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3374 size_t count, loff_t * offset)
1da177e4 3375{
877211f5
TI		 3376 struct snd_pcm_file *pcm_file;
3377 struct snd_pcm_substream *substream;
3378 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3379 snd_pcm_sframes_t result;
3380
3381 pcm_file = file->private_data;
3382 substream = pcm_file->substream;
7eaa943c
TI		 3383 if (PCM_RUNTIME_CHECK(substream))
3384 return -ENXIO;
1da177e4 3385 runtime = substream->runtime;
7eaa943c
TI		 3386 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3387 return -EBADFD;
3388 if (!frame_aligned(runtime, count))
3389 return -EINVAL;
1da177e4
LT		 3390 count = bytes_to_frames(runtime, count);
3391 result = snd_pcm_lib_write(substream, buf, count);
3392 if (result > 0)
3393 result = frames_to_bytes(runtime, result);
1da177e4
LT		 3394 return result;
3395}
3396
1c65d986 3397static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
1da177e4 3398{
877211f5
TI		 3399 struct snd_pcm_file *pcm_file;
3400 struct snd_pcm_substream *substream;
3401 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3402 snd_pcm_sframes_t result;
3403 unsigned long i;
3404 void __user **bufs;
3405 snd_pcm_uframes_t frames;
3406
ee0b3e67 3407 pcm_file = iocb->ki_filp->private_data;
1da177e4 3408 substream = pcm_file->substream;
7eaa943c
TI		 3409 if (PCM_RUNTIME_CHECK(substream))
3410 return -ENXIO;
1da177e4
LT		 3411 runtime = substream->runtime;
3412 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3413 return -EBADFD;
1c65d986
AV		 3414 if (!iter_is_iovec(to))
3415 return -EINVAL;
3416 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
1da177e4 3417 return -EINVAL;
1c65d986 3418 if (!frame_aligned(runtime, to->iov->iov_len))
1da177e4 3419 return -EINVAL;
1c65d986 3420 frames = bytes_to_samples(runtime, to->iov->iov_len);
6da2ec56 3421 bufs = kmalloc_array(to->nr_segs, sizeof(void *), GFP_KERNEL);
1da177e4
LT		 3422 if (bufs == NULL)
3423 return -ENOMEM;
1c65d986
AV		 3424 for (i = 0; i < to->nr_segs; ++i)
3425 bufs[i] = to->iov[i].iov_base;
1da177e4
LT		 3426 result = snd_pcm_lib_readv(substream, bufs, frames);
3427 if (result > 0)
3428 result = frames_to_bytes(runtime, result);
3429 kfree(bufs);
3430 return result;
3431}
3432
1c65d986 3433static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
1da177e4 3434{
877211f5
TI		 3435 struct snd_pcm_file *pcm_file;
3436 struct snd_pcm_substream *substream;
3437 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3438 snd_pcm_sframes_t result;
3439 unsigned long i;
3440 void __user **bufs;
3441 snd_pcm_uframes_t frames;
3442
ee0b3e67 3443 pcm_file = iocb->ki_filp->private_data;
1da177e4 3444 substream = pcm_file->substream;
7eaa943c
TI		 3445 if (PCM_RUNTIME_CHECK(substream))
3446 return -ENXIO;
1da177e4 3447 runtime = substream->runtime;
7eaa943c
TI		 3448 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3449 return -EBADFD;
1c65d986
AV		 3450 if (!iter_is_iovec(from))
3451 return -EINVAL;
3452 if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
3453 !frame_aligned(runtime, from->iov->iov_len))
7eaa943c 3454 return -EINVAL;
1c65d986 3455 frames = bytes_to_samples(runtime, from->iov->iov_len);
6da2ec56 3456 bufs = kmalloc_array(from->nr_segs, sizeof(void *), GFP_KERNEL);
1da177e4
LT		 3457 if (bufs == NULL)
3458 return -ENOMEM;
1c65d986
AV		 3459 for (i = 0; i < from->nr_segs; ++i)
3460 bufs[i] = from->iov[i].iov_base;
1da177e4
LT		 3461 result = snd_pcm_lib_writev(substream, bufs, frames);
3462 if (result > 0)
3463 result = frames_to_bytes(runtime, result);
3464 kfree(bufs);
1da177e4
LT		 3465 return result;
3466}
3467
6448fcba 3468static __poll_t snd_pcm_poll(struct file *file, poll_table *wait)
1da177e4 3469{
877211f5
TI		 3470 struct snd_pcm_file *pcm_file;
3471 struct snd_pcm_substream *substream;
3472 struct snd_pcm_runtime *runtime;
6448fcba 3473 __poll_t mask, ok;
1da177e4
LT		 3474 snd_pcm_uframes_t avail;
3475
3476 pcm_file = file->private_data;
3477
3478 substream = pcm_file->substream;
6448fcba
TI		 3479 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3480 ok = EPOLLOUT | EPOLLWRNORM;
3481 else
3482 ok = EPOLLIN | EPOLLRDNORM;
7eaa943c 3483 if (PCM_RUNTIME_CHECK(substream))
6448fcba 3484 return ok | EPOLLERR;
1da177e4 3485
1da177e4 3486 runtime = substream->runtime;
1da177e4
LT		 3487 poll_wait(file, &runtime->sleep, wait);
3488
6448fcba 3489 mask = 0;
1da177e4 3490 snd_pcm_stream_lock_irq(substream);
6448fcba 3491 avail = snd_pcm_avail(substream);
1da177e4
LT		 3492 switch (runtime->status->state) {
3493 case SNDRV_PCM_STATE_RUNNING:
3494 case SNDRV_PCM_STATE_PREPARED:
3495 case SNDRV_PCM_STATE_PAUSED:
6448fcba
TI		 3496 if (avail >= runtime->control->avail_min)
3497 mask = ok;
1da177e4
LT		 3498 break;
3499 case SNDRV_PCM_STATE_DRAINING:
6448fcba
TI		 3500 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
3501 mask = ok;
3502 if (!avail)
3503 mask |= EPOLLERR;
1da177e4 3504 }
6448fcba 3505 break;
1da177e4 3506 default:
6448fcba 3507 mask = ok | EPOLLERR;
1da177e4
LT		 3508 break;
3509 }
3510 snd_pcm_stream_unlock_irq(substream);
3511 return mask;
3512}
3513
3514/*
3515 * mmap support
3516 */
3517
3518/*
3519 * Only on coherent architectures, we can mmap the status and the control records
3520 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3521 */
3522#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3523/*
3524 * mmap status record
3525 */
41412fe9 3526static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf)
1da177e4 3527{
11bac800 3528 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3529 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3530
3531 if (substream == NULL)
3ad5afcd 3532 return VM_FAULT_SIGBUS;
1da177e4 3533 runtime = substream->runtime;
3ad5afcd
NP		 3534 vmf->page = virt_to_page(runtime->status);
3535 get_page(vmf->page);
3536 return 0;
1da177e4
LT		 3537}
3538
f0f37e2f 3539static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3540{
3ad5afcd 3541 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3542};
3543
877211f5 3544static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3545 struct vm_area_struct *area)
3546{
1da177e4
LT		 3547 long size;
3548 if (!(area->vm_flags & VM_READ))
3549 return -EINVAL;
1da177e4 3550 size = area->vm_end - area->vm_start;
877211f5 3551 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3552 return -EINVAL;
3553 area->vm_ops = &snd_pcm_vm_ops_status;
3554 area->vm_private_data = substream;
314e51b9 3555 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3556 return 0;
3557}
3558
3559/*
3560 * mmap control record
3561 */
41412fe9 3562static vm_fault_t snd_pcm_mmap_control_fault(struct vm_fault *vmf)
1da177e4 3563{
11bac800 3564 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3565 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3566
3567 if (substream == NULL)
3ad5afcd 3568 return VM_FAULT_SIGBUS;
1da177e4 3569 runtime = substream->runtime;
3ad5afcd
NP		 3570 vmf->page = virt_to_page(runtime->control);
3571 get_page(vmf->page);
3572 return 0;
1da177e4
LT		 3573}
3574
f0f37e2f 3575static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3576{
3ad5afcd 3577 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3578};
3579
877211f5 3580static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3581 struct vm_area_struct *area)
3582{
1da177e4
LT		 3583 long size;
3584 if (!(area->vm_flags & VM_READ))
3585 return -EINVAL;
1da177e4 3586 size = area->vm_end - area->vm_start;
877211f5 3587 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3588 return -EINVAL;
3589 area->vm_ops = &snd_pcm_vm_ops_control;
3590 area->vm_private_data = substream;
314e51b9 3591 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3592 return 0;
3593}
42f94597
TI		 3594
3595static bool pcm_status_mmap_allowed(struct snd_pcm_file *pcm_file)
3596{
b602aa8e
TI		 3597 /* See pcm_control_mmap_allowed() below.
3598 * Since older alsa-lib requires both status and control mmaps to be
3599 * coupled, we have to disable the status mmap for old alsa-lib, too.
3600 */
3601 if (pcm_file->user_pversion < SNDRV_PROTOCOL_VERSION(2, 0, 14) &&
3602 (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR))
3603 return false;
3604 return true;
3605}
3606
3607static bool pcm_control_mmap_allowed(struct snd_pcm_file *pcm_file)
3608{
3609 if (pcm_file->no_compat_mmap)
3610 return false;
3611 /* Disallow the control mmap when SYNC_APPLPTR flag is set;
42f94597
TI		 3612 * it enforces the user-space to fall back to snd_pcm_sync_ptr(),
3613 * thus it effectively assures the manual update of appl_ptr.
42f94597
TI		 3614 */
3615 if (pcm_file->substream->runtime->hw.info & SNDRV_PCM_INFO_SYNC_APPLPTR)
3616 return false;
3617 return true;
3618}
3619
1da177e4
LT		 3620#else /* ! coherent mmap */
3621/*
3622 * don't support mmap for status and control records.
3623 */
42f94597 3624#define pcm_status_mmap_allowed(pcm_file) false
b602aa8e 3625#define pcm_control_mmap_allowed(pcm_file) false
42f94597 3626
877211f5 3627static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3628 struct vm_area_struct *area)
3629{
3630 return -ENXIO;
3631}
877211f5 3632static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3633 struct vm_area_struct *area)
3634{
3635 return -ENXIO;
3636}
3637#endif /* coherent mmap */
3638
9eb4a067
TI		 3639static inline struct page *
3640snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3641{
3642 void *vaddr = substream->runtime->dma_area + ofs;
7e8edae3
TI		 3643
3644 switch (substream->dma_buffer.dev.type) {
3645#ifdef CONFIG_SND_DMA_SGBUF
3646 case SNDRV_DMA_TYPE_DEV_SG:
3647 case SNDRV_DMA_TYPE_DEV_UC_SG:
3648 return snd_pcm_sgbuf_ops_page(substream, ofs);
3649#endif /* CONFIG_SND_DMA_SGBUF */
3650 case SNDRV_DMA_TYPE_VMALLOC:
3651 return vmalloc_to_page(vaddr);
3652 default:
3653 return virt_to_page(vaddr);
3654 }
9eb4a067
TI		 3655}
3656
1da177e4 3657/*
3ad5afcd 3658 * fault callback for mmapping a RAM page
1da177e4 3659 */
41412fe9 3660static vm_fault_t snd_pcm_mmap_data_fault(struct vm_fault *vmf)
1da177e4 3661{
11bac800 3662 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3663 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3664 unsigned long offset;
3665 struct page * page;
1da177e4
LT		 3666 size_t dma_bytes;
3667
3668 if (substream == NULL)
3ad5afcd 3669 return VM_FAULT_SIGBUS;
1da177e4 3670 runtime = substream->runtime;
3ad5afcd 3671 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3672 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3673 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3674 return VM_FAULT_SIGBUS;
9eb4a067 3675 if (substream->ops->page)
1da177e4 3676 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3677 else
3678 page = snd_pcm_default_page_ops(substream, offset);
3679 if (!page)
3680 return VM_FAULT_SIGBUS;
b5810039 3681 get_page(page);
3ad5afcd
NP		 3682 vmf->page = page;
3683 return 0;
1da177e4
LT		 3684}
3685
657b1989
TI		 3686static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3687 .open = snd_pcm_mmap_data_open,
3688 .close = snd_pcm_mmap_data_close,
3689};
3690
3691static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3692 .open = snd_pcm_mmap_data_open,
3693 .close = snd_pcm_mmap_data_close,
3ad5afcd 3694 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3695};
3696
3697/*
3698 * mmap the DMA buffer on RAM
3699 */
30b771cf
TI		 3700
3701/**
3702 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3703 * @substream: PCM substream
3704 * @area: VMA
3705 *
3706 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3707 * this function is invoked implicitly.
3708 */
18a2b962
TI		 3709int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3710 struct vm_area_struct *area)
1da177e4 3711{
314e51b9 3712 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
a5606f85 3713#ifdef CONFIG_GENERIC_ALLOCATOR
05503214
NC		 3714 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3715 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3716 return remap_pfn_range(area, area->vm_start,
3717 substream->dma_buffer.addr >> PAGE_SHIFT,
3718 area->vm_end - area->vm_start, area->vm_page_prot);
3719 }
a5606f85 3720#endif /* CONFIG_GENERIC_ALLOCATOR */
abe594c2 3721 if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page &&
2406ff9b
TI		 3722 (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV ||
3723 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_UC))
657b1989
TI		 3724 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3725 area,
3726 substream->runtime->dma_area,
3727 substream->runtime->dma_addr,
9066ae7f 3728 substream->runtime->dma_bytes);
657b1989
TI		 3729 /* mmap with fault handler */
3730 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3731 return 0;
3732}
18a2b962 3733EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3734
3735/*
3736 * mmap the DMA buffer on I/O memory area
3737 */
3738#if SNDRV_PCM_INFO_MMAP_IOMEM
30b771cf
TI		 3739/**
3740 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3741 * @substream: PCM substream
3742 * @area: VMA
3743 *
3744 * When your hardware uses the iomapped pages as the hardware buffer and
3745 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3746 * is supposed to work only on limited architectures.
3747 */
877211f5
TI		 3748int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3749 struct vm_area_struct *area)
1da177e4 3750{
3c7f6919 3751 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 3752
1da177e4 3753 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
0fe09a45 3754 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
1da177e4 3755}
e88e8ae6 3756EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3757#endif /* SNDRV_PCM_INFO_MMAP */
3758
3759/*
3760 * mmap DMA buffer
3761 */
877211f5 3762int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3763 struct vm_area_struct *area)
3764{
877211f5 3765 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3766 long size;
3767 unsigned long offset;
3768 size_t dma_bytes;
657b1989 3769 int err;
1da177e4
LT		 3770
3771 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3772 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3773 return -EINVAL;
3774 } else {
3775 if (!(area->vm_flags & VM_READ))
3776 return -EINVAL;
3777 }
3778 runtime = substream->runtime;
1da177e4
LT		 3779 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3780 return -EBADFD;
3781 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3782 return -ENXIO;
3783 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3784 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3785 return -EINVAL;
3786 size = area->vm_end - area->vm_start;
3787 offset = area->vm_pgoff << PAGE_SHIFT;
3788 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3789 if ((size_t)size > dma_bytes)
3790 return -EINVAL;
3791 if (offset > dma_bytes - size)
3792 return -EINVAL;
3793
657b1989
TI		 3794 area->vm_ops = &snd_pcm_vm_ops_data;
3795 area->vm_private_data = substream;
1da177e4 3796 if (substream->ops->mmap)
657b1989 3797 err = substream->ops->mmap(substream, area);
1da177e4 3798 else
18a2b962 3799 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3800 if (!err)
3801 atomic_inc(&substream->mmap_count);
3802 return err;
1da177e4 3803}
e88e8ae6
TI		 3804EXPORT_SYMBOL(snd_pcm_mmap_data);
3805
1da177e4
LT		 3806static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3807{
877211f5
TI		 3808 struct snd_pcm_file * pcm_file;
3809 struct snd_pcm_substream *substream;
1da177e4
LT		 3810 unsigned long offset;
3811
3812 pcm_file = file->private_data;
3813 substream = pcm_file->substream;
7eaa943c
TI		 3814 if (PCM_RUNTIME_CHECK(substream))
3815 return -ENXIO;
1da177e4
LT		 3816
3817 offset = area->vm_pgoff << PAGE_SHIFT;
3818 switch (offset) {
80fe7430
AB		 3819 case SNDRV_PCM_MMAP_OFFSET_STATUS_OLD:
3820 if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT))
3821 return -ENXIO;
c0dbbdad 3822 fallthrough;
80fe7430 3823 case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW:
42f94597 3824 if (!pcm_status_mmap_allowed(pcm_file))
1da177e4
LT		 3825 return -ENXIO;
3826 return snd_pcm_mmap_status(substream, file, area);
80fe7430
AB		 3827 case SNDRV_PCM_MMAP_OFFSET_CONTROL_OLD:
3828 if (pcm_file->no_compat_mmap || !IS_ENABLED(CONFIG_64BIT))
3829 return -ENXIO;
c0dbbdad 3830 fallthrough;
80fe7430 3831 case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW:
b602aa8e 3832 if (!pcm_control_mmap_allowed(pcm_file))
1da177e4
LT		 3833 return -ENXIO;
3834 return snd_pcm_mmap_control(substream, file, area);
3835 default:
3836 return snd_pcm_mmap_data(substream, file, area);
3837 }
3838 return 0;
3839}
3840
3841static int snd_pcm_fasync(int fd, struct file * file, int on)
3842{
877211f5
TI		 3843 struct snd_pcm_file * pcm_file;
3844 struct snd_pcm_substream *substream;
3845 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3846
3847 pcm_file = file->private_data;
3848 substream = pcm_file->substream;
7eaa943c 3849 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3850 return -ENXIO;
1da177e4 3851 runtime = substream->runtime;
d05468b7 3852 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3853}
3854
3855/*
3856 * ioctl32 compat
3857 */
3858#ifdef CONFIG_COMPAT
3859#include "pcm_compat.c"
3860#else
3861#define snd_pcm_ioctl_compat NULL
3862#endif
3863
3864/*
3865 * To be removed helpers to keep binary compatibility
3866 */
3867
59d48582 3868#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3869#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3870#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3871
877211f5
TI		 3872static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3873 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3874{
3875 unsigned int i;
3876
3877 memset(params, 0, sizeof(*params));
3878 params->flags = oparams->flags;
3879 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3880 params->masks[i].bits[0] = oparams->masks[i];
3881 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3882 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3883 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3884 params->info = oparams->info;
3885 params->msbits = oparams->msbits;
3886 params->rate_num = oparams->rate_num;
3887 params->rate_den = oparams->rate_den;
3888 params->fifo_size = oparams->fifo_size;
3889}
3890
877211f5
TI		 3891static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3892 struct snd_pcm_hw_params *params)
1da177e4
LT		 3893{
3894 unsigned int i;
3895
3896 memset(oparams, 0, sizeof(*oparams));
3897 oparams->flags = params->flags;
3898 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3899 oparams->masks[i] = params->masks[i].bits[0];
3900 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3901 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3902 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3903 oparams->info = params->info;
3904 oparams->msbits = params->msbits;
3905 oparams->rate_num = params->rate_num;
3906 oparams->rate_den = params->rate_den;
3907 oparams->fifo_size = params->fifo_size;
3908}
3909
877211f5
TI		 3910static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3911 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3912{
877211f5
TI		 3913 struct snd_pcm_hw_params *params;
3914 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3915 int err;
3916
3917 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3918 if (!params)
3919 return -ENOMEM;
1da177e4 3920
ef44a1ec
LZ		 3921 oparams = memdup_user(_oparams, sizeof(*oparams));
3922 if (IS_ERR(oparams)) {
3923 err = PTR_ERR(oparams);
1da177e4
LT		 3924 goto out;
3925 }
3926 snd_pcm_hw_convert_from_old_params(params, oparams);
3927 err = snd_pcm_hw_refine(substream, params);
f74ae15f
TS		 3928 if (err < 0)
3929 goto out_old;
ef44a1ec 3930
f74ae15f
TS		 3931 err = fixup_unreferenced_params(substream, params);
3932 if (err < 0)
3933 goto out_old;
ef44a1ec 3934
f74ae15f
TS		 3935 snd_pcm_hw_convert_to_old_params(oparams, params);
3936 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3937 err = -EFAULT;
3938out_old:
ef44a1ec 3939 kfree(oparams);
1da177e4
LT		 3940out:
3941 kfree(params);
1da177e4
LT		 3942 return err;
3943}
3944
877211f5
TI		 3945static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3946 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3947{
877211f5
TI		 3948 struct snd_pcm_hw_params *params;
3949 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3950 int err;
3951
3952 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3953 if (!params)
3954 return -ENOMEM;
3955
3956 oparams = memdup_user(_oparams, sizeof(*oparams));
3957 if (IS_ERR(oparams)) {
3958 err = PTR_ERR(oparams);
1da177e4
LT		 3959 goto out;
3960 }
f74ae15f 3961
1da177e4
LT		 3962 snd_pcm_hw_convert_from_old_params(params, oparams);
3963 err = snd_pcm_hw_params(substream, params);
f74ae15f
TS		 3964 if (err < 0)
3965 goto out_old;
ef44a1ec 3966
f74ae15f
TS		 3967 snd_pcm_hw_convert_to_old_params(oparams, params);
3968 if (copy_to_user(_oparams, oparams, sizeof(*oparams)))
3969 err = -EFAULT;
3970out_old:
ef44a1ec 3971 kfree(oparams);
1da177e4
LT		 3972out:
3973 kfree(params);
1da177e4
LT		 3974 return err;
3975}
59d48582 3976#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3977
7003609b 3978#ifndef CONFIG_MMU
55c63bd2
DG		 3979static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3980 unsigned long addr,
3981 unsigned long len,
3982 unsigned long pgoff,
3983 unsigned long flags)
3984{
3985 struct snd_pcm_file *pcm_file = file->private_data;
3986 struct snd_pcm_substream *substream = pcm_file->substream;
3987 struct snd_pcm_runtime *runtime = substream->runtime;
3988 unsigned long offset = pgoff << PAGE_SHIFT;
3989
3990 switch (offset) {
80fe7430 3991 case SNDRV_PCM_MMAP_OFFSET_STATUS_NEW:
55c63bd2 3992 return (unsigned long)runtime->status;
80fe7430 3993 case SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW:
55c63bd2
DG		 3994 return (unsigned long)runtime->control;
3995 default:
3996 return (unsigned long)runtime->dma_area + offset;
3997 }
7003609b
CC		 3998}
3999#else
55c63bd2 4000# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 4001#endif
4002
1da177e4
LT		 4003/*
4004 * Register section
4005 */
4006
9c2e08c5 4007const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 4008 {
2af677fc
CL		 4009 .owner = THIS_MODULE,
4010 .write = snd_pcm_write,
1c65d986 4011 .write_iter = snd_pcm_writev,
f87135f5 4012 .open = snd_pcm_playback_open,
2af677fc 4013 .release = snd_pcm_release,
02f4865f 4014 .llseek = no_llseek,
6448fcba 4015 .poll = snd_pcm_poll,
67616fed 4016 .unlocked_ioctl = snd_pcm_ioctl,
2af677fc
CL		 4017 .compat_ioctl = snd_pcm_ioctl_compat,
4018 .mmap = snd_pcm_mmap,
4019 .fasync = snd_pcm_fasync,
55c63bd2 4020 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 4021 },
4022 {
2af677fc
CL		 4023 .owner = THIS_MODULE,
4024 .read = snd_pcm_read,
1c65d986 4025 .read_iter = snd_pcm_readv,
f87135f5 4026 .open = snd_pcm_capture_open,
2af677fc 4027 .release = snd_pcm_release,
02f4865f 4028 .llseek = no_llseek,
6448fcba 4029 .poll = snd_pcm_poll,
67616fed 4030 .unlocked_ioctl = snd_pcm_ioctl,
2af677fc
CL		 4031 .compat_ioctl = snd_pcm_ioctl_compat,
4032 .mmap = snd_pcm_mmap,
4033 .fasync = snd_pcm_fasync,
55c63bd2 4034 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 4035 }
4036};
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