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[mirror_ubuntu-artful-kernel.git] / sound / core / pcm_native.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
1da177e4 22#include <linux/mm.h>
da155d5b 23#include <linux/module.h>
1da177e4
LT		 24#include <linux/file.h>
25#include <linux/slab.h>
174cd4b1 26#include <linux/sched/signal.h>
1da177e4 27#include <linux/time.h>
e8db0be1 28#include <linux/pm_qos.h>
6cbbfe1c 29#include <linux/io.h>
657b1989 30#include <linux/dma-mapping.h>
1da177e4
LT		 31#include <sound/core.h>
32#include <sound/control.h>
33#include <sound/info.h>
34#include <sound/pcm.h>
35#include <sound/pcm_params.h>
36#include <sound/timer.h>
37#include <sound/minors.h>
e2e40f2c 38#include <linux/uio.h>
1da177e4
LT		 39
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
TI		 75static DEFINE_RWLOCK(snd_pcm_link_rwlock);
76static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4 77
67ec1072
TI		 78/* Writer in rwsem may block readers even during its waiting in queue,
79 * and this may lead to a deadlock when the code path takes read sem
80 * twice (e.g. one in snd_pcm_action_nonatomic() and another in
81 * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to
82 * spin until it gets the lock.
83 */
84static inline void down_write_nonblock(struct rw_semaphore *lock)
85{
86 while (!down_write_trylock(lock))
87 cond_resched();
88}
89
30b771cf
TI		 90/**
91 * snd_pcm_stream_lock - Lock the PCM stream
92 * @substream: PCM substream
93 *
94 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
95 * flag of the given substream. This also takes the global link rw lock
96 * (or rw sem), too, for avoiding the race with linked streams.
97 */
7af142f7
TI		 98void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
99{
100 if (substream->pcm->nonatomic) {
67756e31 101 down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING);
7af142f7
TI		 102 mutex_lock(&substream->self_group.mutex);
103 } else {
104 read_lock(&snd_pcm_link_rwlock);
105 spin_lock(&substream->self_group.lock);
106 }
107}
108EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
109
30b771cf
TI		 110/**
111 * snd_pcm_stream_lock - Unlock the PCM stream
112 * @substream: PCM substream
113 *
114 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
115 */
7af142f7
TI		 116void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
117{
118 if (substream->pcm->nonatomic) {
119 mutex_unlock(&substream->self_group.mutex);
120 up_read(&snd_pcm_link_rwsem);
121 } else {
122 spin_unlock(&substream->self_group.lock);
123 read_unlock(&snd_pcm_link_rwlock);
124 }
125}
126EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
127
30b771cf
TI		 128/**
129 * snd_pcm_stream_lock_irq - Lock the PCM stream
130 * @substream: PCM substream
131 *
132 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
133 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
134 * as snd_pcm_stream_lock().
135 */
7af142f7
TI		 136void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
137{
138 if (!substream->pcm->nonatomic)
139 local_irq_disable();
140 snd_pcm_stream_lock(substream);
141}
142EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
143
30b771cf
TI		 144/**
145 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
146 * @substream: PCM substream
147 *
148 * This is a counter-part of snd_pcm_stream_lock_irq().
149 */
7af142f7
TI		 150void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
151{
152 snd_pcm_stream_unlock(substream);
153 if (!substream->pcm->nonatomic)
154 local_irq_enable();
155}
156EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
157
158unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
159{
160 unsigned long flags = 0;
161 if (!substream->pcm->nonatomic)
162 local_irq_save(flags);
163 snd_pcm_stream_lock(substream);
164 return flags;
165}
166EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
167
30b771cf
TI		 168/**
169 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
170 * @substream: PCM substream
171 * @flags: irq flags
172 *
173 * This is a counter-part of snd_pcm_stream_lock_irqsave().
174 */
7af142f7
TI		 175void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
176 unsigned long flags)
177{
178 snd_pcm_stream_unlock(substream);
179 if (!substream->pcm->nonatomic)
180 local_irq_restore(flags);
181}
182EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
1da177e4
LT		 183
184static inline mm_segment_t snd_enter_user(void)
185{
186 mm_segment_t fs = get_fs();
187 set_fs(get_ds());
188 return fs;
189}
190
191static inline void snd_leave_user(mm_segment_t fs)
192{
193 set_fs(fs);
194}
195
196
197
877211f5 198int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 199{
877211f5
TI		 200 struct snd_pcm_runtime *runtime;
201 struct snd_pcm *pcm = substream->pcm;
202 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 203
1da177e4
LT		 204 memset(info, 0, sizeof(*info));
205 info->card = pcm->card->number;
206 info->device = pcm->device;
207 info->stream = substream->stream;
208 info->subdevice = substream->number;
209 strlcpy(info->id, pcm->id, sizeof(info->id));
210 strlcpy(info->name, pcm->name, sizeof(info->name));
211 info->dev_class = pcm->dev_class;
212 info->dev_subclass = pcm->dev_subclass;
213 info->subdevices_count = pstr->substream_count;
214 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
215 strlcpy(info->subname, substream->name, sizeof(info->subname));
216 runtime = substream->runtime;
217 /* AB: FIXME!!! This is definitely nonsense */
218 if (runtime) {
219 info->sync = runtime->sync;
220 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
221 }
222 return 0;
223}
224
877211f5
TI		 225int snd_pcm_info_user(struct snd_pcm_substream *substream,
226 struct snd_pcm_info __user * _info)
1da177e4 227{
877211f5 228 struct snd_pcm_info *info;
1da177e4
LT		 229 int err;
230
231 info = kmalloc(sizeof(*info), GFP_KERNEL);
232 if (! info)
233 return -ENOMEM;
234 err = snd_pcm_info(substream, info);
235 if (err >= 0) {
236 if (copy_to_user(_info, info, sizeof(*info)))
237 err = -EFAULT;
238 }
239 kfree(info);
240 return err;
241}
242
63825f3a
TI		 243static bool hw_support_mmap(struct snd_pcm_substream *substream)
244{
245 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
246 return false;
247 /* check architectures that return -EINVAL from dma_mmap_coherent() */
248 /* FIXME: this should be some global flag */
249#if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
250 defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
251 if (!substream->ops->mmap &&
252 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
253 return false;
254#endif
255 return true;
256}
257
1da177e4
LT		 258#undef RULES_DEBUG
259
260#ifdef RULES_DEBUG
261#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
47023ec7 262static const char * const snd_pcm_hw_param_names[] = {
1da177e4
LT		 263 HW_PARAM(ACCESS),
264 HW_PARAM(FORMAT),
265 HW_PARAM(SUBFORMAT),
266 HW_PARAM(SAMPLE_BITS),
267 HW_PARAM(FRAME_BITS),
268 HW_PARAM(CHANNELS),
269 HW_PARAM(RATE),
270 HW_PARAM(PERIOD_TIME),
271 HW_PARAM(PERIOD_SIZE),
272 HW_PARAM(PERIOD_BYTES),
273 HW_PARAM(PERIODS),
274 HW_PARAM(BUFFER_TIME),
275 HW_PARAM(BUFFER_SIZE),
276 HW_PARAM(BUFFER_BYTES),
277 HW_PARAM(TICK_TIME),
278};
279#endif
280
877211f5
TI		 281int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
282 struct snd_pcm_hw_params *params)
1da177e4
LT		 283{
284 unsigned int k;
877211f5
TI		 285 struct snd_pcm_hardware *hw;
286 struct snd_interval *i = NULL;
287 struct snd_mask *m = NULL;
288 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 289 unsigned int rstamps[constrs->rules_num];
290 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
291 unsigned int stamp = 2;
292 int changed, again;
293
294 params->info = 0;
295 params->fifo_size = 0;
296 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
297 params->msbits = 0;
298 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
299 params->rate_num = 0;
300 params->rate_den = 0;
301 }
302
303 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
304 m = hw_param_mask(params, k);
305 if (snd_mask_empty(m))
306 return -EINVAL;
307 if (!(params->rmask & (1 << k)))
308 continue;
309#ifdef RULES_DEBUG
09e56df8
TI		 310 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
311 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
1da177e4
LT		 312#endif
313 changed = snd_mask_refine(m, constrs_mask(constrs, k));
314#ifdef RULES_DEBUG
09e56df8 315 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
1da177e4
LT		 316#endif
317 if (changed)
318 params->cmask |= 1 << k;
319 if (changed < 0)
320 return changed;
321 }
322
323 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
324 i = hw_param_interval(params, k);
325 if (snd_interval_empty(i))
326 return -EINVAL;
327 if (!(params->rmask & (1 << k)))
328 continue;
329#ifdef RULES_DEBUG
09e56df8 330 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
1da177e4 331 if (i->empty)
09e56df8 332 pr_cont("empty");
1da177e4 333 else
09e56df8 334 pr_cont("%c%u %u%c",
1da177e4
LT		 335 i->openmin ? '(' : '[', i->min,
336 i->max, i->openmax ? ')' : ']');
09e56df8 337 pr_cont(" -> ");
1da177e4
LT		 338#endif
339 changed = snd_interval_refine(i, constrs_interval(constrs, k));
340#ifdef RULES_DEBUG
341 if (i->empty)
09e56df8 342 pr_cont("empty\n");
1da177e4 343 else
09e56df8 344 pr_cont("%c%u %u%c\n",
1da177e4
LT		 345 i->openmin ? '(' : '[', i->min,
346 i->max, i->openmax ? ')' : ']');
347#endif
348 if (changed)
349 params->cmask |= 1 << k;
350 if (changed < 0)
351 return changed;
352 }
353
354 for (k = 0; k < constrs->rules_num; k++)
355 rstamps[k] = 0;
356 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
357 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
358 do {
359 again = 0;
360 for (k = 0; k < constrs->rules_num; k++) {
877211f5 361 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 362 unsigned int d;
363 int doit = 0;
364 if (r->cond && !(r->cond & params->flags))
365 continue;
366 for (d = 0; r->deps[d] >= 0; d++) {
367 if (vstamps[r->deps[d]] > rstamps[k]) {
368 doit = 1;
369 break;
370 }
371 }
372 if (!doit)
373 continue;
374#ifdef RULES_DEBUG
09e56df8 375 pr_debug("Rule %d [%p]: ", k, r->func);
1da177e4 376 if (r->var >= 0) {
09e56df8 377 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]);
1da177e4
LT		 378 if (hw_is_mask(r->var)) {
379 m = hw_param_mask(params, r->var);
09e56df8 380 pr_cont("%x", *m->bits);
1da177e4
LT		 381 } else {
382 i = hw_param_interval(params, r->var);
383 if (i->empty)
09e56df8 384 pr_cont("empty");
1da177e4 385 else
09e56df8 386 pr_cont("%c%u %u%c",
1da177e4
LT		 387 i->openmin ? '(' : '[', i->min,
388 i->max, i->openmax ? ')' : ']');
389 }
390 }
391#endif
392 changed = r->func(params, r);
393#ifdef RULES_DEBUG
394 if (r->var >= 0) {
09e56df8 395 pr_cont(" -> ");
1da177e4 396 if (hw_is_mask(r->var))
09e56df8 397 pr_cont("%x", *m->bits);
1da177e4
LT		 398 else {
399 if (i->empty)
09e56df8 400 pr_cont("empty");
1da177e4 401 else
09e56df8 402 pr_cont("%c%u %u%c",
1da177e4
LT		 403 i->openmin ? '(' : '[', i->min,
404 i->max, i->openmax ? ')' : ']');
405 }
406 }
09e56df8 407 pr_cont("\n");
1da177e4
LT		 408#endif
409 rstamps[k] = stamp;
410 if (changed && r->var >= 0) {
411 params->cmask |= (1 << r->var);
412 vstamps[r->var] = stamp;
413 again = 1;
414 }
415 if (changed < 0)
416 return changed;
417 stamp++;
418 }
419 } while (again);
420 if (!params->msbits) {
421 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
422 if (snd_interval_single(i))
423 params->msbits = snd_interval_value(i);
424 }
425
426 if (!params->rate_den) {
427 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
428 if (snd_interval_single(i)) {
429 params->rate_num = snd_interval_value(i);
430 params->rate_den = 1;
431 }
432 }
433
434 hw = &substream->runtime->hw;
63825f3a 435 if (!params->info) {
48d88297
LY		 436 params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
437 SNDRV_PCM_INFO_DRAIN_TRIGGER);
63825f3a
TI		 438 if (!hw_support_mmap(substream))
439 params->info &= ~(SNDRV_PCM_INFO_MMAP |
440 SNDRV_PCM_INFO_MMAP_VALID);
441 }
8bea869c 442 if (!params->fifo_size) {
3be522a9
JK		 443 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
444 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
445 if (snd_mask_min(m) == snd_mask_max(m) &&
446 snd_interval_min(i) == snd_interval_max(i)) {
8bea869c
JK		 447 changed = substream->ops->ioctl(substream,
448 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
8bd9bca3 449 if (changed < 0)
8bea869c
JK		 450 return changed;
451 }
452 }
1da177e4
LT		 453 params->rmask = 0;
454 return 0;
455}
456
e88e8ae6
TI		 457EXPORT_SYMBOL(snd_pcm_hw_refine);
458
877211f5
TI		 459static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
460 struct snd_pcm_hw_params __user * _params)
1da177e4 461{
877211f5 462 struct snd_pcm_hw_params *params;
1da177e4
LT		 463 int err;
464
ef44a1ec
LZ		 465 params = memdup_user(_params, sizeof(*params));
466 if (IS_ERR(params))
467 return PTR_ERR(params);
468
1da177e4
LT		 469 err = snd_pcm_hw_refine(substream, params);
470 if (copy_to_user(_params, params, sizeof(*params))) {
471 if (!err)
472 err = -EFAULT;
473 }
ef44a1ec 474
1da177e4
LT		 475 kfree(params);
476 return err;
477}
478
9442e691
TI		 479static int period_to_usecs(struct snd_pcm_runtime *runtime)
480{
481 int usecs;
482
483 if (! runtime->rate)
484 return -1; /* invalid */
485
486 /* take 75% of period time as the deadline */
487 usecs = (750000 / runtime->rate) * runtime->period_size;
488 usecs += ((750000 % runtime->rate) * runtime->period_size) /
489 runtime->rate;
490
491 return usecs;
492}
493
9b0573c0
TI		 494static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
495{
496 snd_pcm_stream_lock_irq(substream);
497 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
498 substream->runtime->status->state = state;
499 snd_pcm_stream_unlock_irq(substream);
500}
501
90bbaf66
JY		 502static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
503 int event)
504{
505#ifdef CONFIG_SND_PCM_TIMER
506 if (substream->timer)
507 snd_timer_notify(substream->timer, event,
508 &substream->runtime->trigger_tstamp);
509#endif
510}
511
877211f5
TI		 512static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
513 struct snd_pcm_hw_params *params)
1da177e4 514{
877211f5 515 struct snd_pcm_runtime *runtime;
9442e691 516 int err, usecs;
1da177e4
LT		 517 unsigned int bits;
518 snd_pcm_uframes_t frames;
519
7eaa943c
TI		 520 if (PCM_RUNTIME_CHECK(substream))
521 return -ENXIO;
1da177e4 522 runtime = substream->runtime;
1da177e4
LT		 523 snd_pcm_stream_lock_irq(substream);
524 switch (runtime->status->state) {
525 case SNDRV_PCM_STATE_OPEN:
526 case SNDRV_PCM_STATE_SETUP:
527 case SNDRV_PCM_STATE_PREPARED:
528 break;
529 default:
530 snd_pcm_stream_unlock_irq(substream);
531 return -EBADFD;
532 }
533 snd_pcm_stream_unlock_irq(substream);
8eeaa2f9 534#if IS_ENABLED(CONFIG_SND_PCM_OSS)
1da177e4
LT		 535 if (!substream->oss.oss)
536#endif
9c323fcb 537 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 538 return -EBADFD;
539
540 params->rmask = ~0U;
541 err = snd_pcm_hw_refine(substream, params);
542 if (err < 0)
543 goto _error;
544
545 err = snd_pcm_hw_params_choose(substream, params);
546 if (err < 0)
547 goto _error;
548
549 if (substream->ops->hw_params != NULL) {
550 err = substream->ops->hw_params(substream, params);
551 if (err < 0)
552 goto _error;
553 }
554
555 runtime->access = params_access(params);
556 runtime->format = params_format(params);
557 runtime->subformat = params_subformat(params);
558 runtime->channels = params_channels(params);
559 runtime->rate = params_rate(params);
560 runtime->period_size = params_period_size(params);
561 runtime->periods = params_periods(params);
562 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 563 runtime->info = params->info;
564 runtime->rate_num = params->rate_num;
565 runtime->rate_den = params->rate_den;
ab69a490
CL		 566 runtime->no_period_wakeup =
567 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
568 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 569
570 bits = snd_pcm_format_physical_width(runtime->format);
571 runtime->sample_bits = bits;
572 bits *= runtime->channels;
573 runtime->frame_bits = bits;
574 frames = 1;
575 while (bits % 8 != 0) {
576 bits *= 2;
577 frames *= 2;
578 }
579 runtime->byte_align = bits / 8;
580 runtime->min_align = frames;
581
582 /* Default sw params */
583 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
584 runtime->period_step = 1;
1da177e4 585 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 586 runtime->start_threshold = 1;
587 runtime->stop_threshold = runtime->buffer_size;
588 runtime->silence_threshold = 0;
589 runtime->silence_size = 0;
ead4046b
CL		 590 runtime->boundary = runtime->buffer_size;
591 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
592 runtime->boundary *= 2;
1da177e4
LT		 593
594 snd_pcm_timer_resolution_change(substream);
9b0573c0 595 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
9442e691 596
82f68251
JB		 597 if (pm_qos_request_active(&substream->latency_pm_qos_req))
598 pm_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 599 if ((usecs = period_to_usecs(runtime)) >= 0)
82f68251
JB		 600 pm_qos_add_request(&substream->latency_pm_qos_req,
601 PM_QOS_CPU_DMA_LATENCY, usecs);
1da177e4
LT		 602 return 0;
603 _error:
25985edc 604 /* hardware might be unusable from this time,
1da177e4
LT		 605 so we force application to retry to set
606 the correct hardware parameter settings */
9b0573c0 607 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
1da177e4
LT		 608 if (substream->ops->hw_free != NULL)
609 substream->ops->hw_free(substream);
610 return err;
611}
612
877211f5
TI		 613static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
614 struct snd_pcm_hw_params __user * _params)
1da177e4 615{
877211f5 616 struct snd_pcm_hw_params *params;
1da177e4
LT		 617 int err;
618
ef44a1ec
LZ		 619 params = memdup_user(_params, sizeof(*params));
620 if (IS_ERR(params))
621 return PTR_ERR(params);
622
1da177e4
LT		 623 err = snd_pcm_hw_params(substream, params);
624 if (copy_to_user(_params, params, sizeof(*params))) {
625 if (!err)
626 err = -EFAULT;
627 }
ef44a1ec 628
1da177e4
LT		 629 kfree(params);
630 return err;
631}
632
877211f5 633static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 634{
877211f5 635 struct snd_pcm_runtime *runtime;
1da177e4
LT		 636 int result = 0;
637
7eaa943c
TI		 638 if (PCM_RUNTIME_CHECK(substream))
639 return -ENXIO;
1da177e4 640 runtime = substream->runtime;
1da177e4
LT		 641 snd_pcm_stream_lock_irq(substream);
642 switch (runtime->status->state) {
643 case SNDRV_PCM_STATE_SETUP:
644 case SNDRV_PCM_STATE_PREPARED:
645 break;
646 default:
647 snd_pcm_stream_unlock_irq(substream);
648 return -EBADFD;
649 }
650 snd_pcm_stream_unlock_irq(substream);
9c323fcb 651 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 652 return -EBADFD;
653 if (substream->ops->hw_free)
654 result = substream->ops->hw_free(substream);
9b0573c0 655 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
82f68251 656 pm_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 657 return result;
658}
659
877211f5
TI		 660static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
661 struct snd_pcm_sw_params *params)
1da177e4 662{
877211f5 663 struct snd_pcm_runtime *runtime;
1250932e 664 int err;
1da177e4 665
7eaa943c
TI		 666 if (PCM_RUNTIME_CHECK(substream))
667 return -ENXIO;
1da177e4 668 runtime = substream->runtime;
1da177e4
LT		 669 snd_pcm_stream_lock_irq(substream);
670 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
671 snd_pcm_stream_unlock_irq(substream);
672 return -EBADFD;
673 }
674 snd_pcm_stream_unlock_irq(substream);
675
145d92e7
DC		 676 if (params->tstamp_mode < 0 ||
677 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
1da177e4 678 return -EINVAL;
58900810
TI		 679 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
680 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
5646eda5 681 return -EINVAL;
1da177e4
LT		 682 if (params->avail_min == 0)
683 return -EINVAL;
1da177e4
LT		 684 if (params->silence_size >= runtime->boundary) {
685 if (params->silence_threshold != 0)
686 return -EINVAL;
687 } else {
688 if (params->silence_size > params->silence_threshold)
689 return -EINVAL;
690 if (params->silence_threshold > runtime->buffer_size)
691 return -EINVAL;
692 }
1250932e 693 err = 0;
1da177e4
LT		 694 snd_pcm_stream_lock_irq(substream);
695 runtime->tstamp_mode = params->tstamp_mode;
58900810
TI		 696 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
697 runtime->tstamp_type = params->tstamp_type;
1da177e4
LT		 698 runtime->period_step = params->period_step;
699 runtime->control->avail_min = params->avail_min;
700 runtime->start_threshold = params->start_threshold;
701 runtime->stop_threshold = params->stop_threshold;
702 runtime->silence_threshold = params->silence_threshold;
703 runtime->silence_size = params->silence_size;
1da177e4
LT		 704 params->boundary = runtime->boundary;
705 if (snd_pcm_running(substream)) {
1da177e4
LT		 706 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
707 runtime->silence_size > 0)
708 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 709 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 710 }
711 snd_pcm_stream_unlock_irq(substream);
1250932e 712 return err;
1da177e4
LT		 713}
714
877211f5
TI		 715static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
716 struct snd_pcm_sw_params __user * _params)
1da177e4 717{
877211f5 718 struct snd_pcm_sw_params params;
1da177e4
LT		 719 int err;
720 if (copy_from_user(&params, _params, sizeof(params)))
721 return -EFAULT;
722 err = snd_pcm_sw_params(substream, &params);
723 if (copy_to_user(_params, &params, sizeof(params)))
724 return -EFAULT;
725 return err;
726}
727
877211f5
TI		 728int snd_pcm_status(struct snd_pcm_substream *substream,
729 struct snd_pcm_status *status)
1da177e4 730{
877211f5 731 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 732
733 snd_pcm_stream_lock_irq(substream);
3179f620
PLB		 734
735 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data,
736 &runtime->audio_tstamp_config);
737
738 /* backwards compatible behavior */
739 if (runtime->audio_tstamp_config.type_requested ==
740 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) {
741 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)
742 runtime->audio_tstamp_config.type_requested =
743 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
744 else
745 runtime->audio_tstamp_config.type_requested =
746 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
747 runtime->audio_tstamp_report.valid = 0;
748 } else
749 runtime->audio_tstamp_report.valid = 1;
750
1da177e4
LT		 751 status->state = runtime->status->state;
752 status->suspended_state = runtime->status->suspended_state;
753 if (status->state == SNDRV_PCM_STATE_OPEN)
754 goto _end;
755 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 756 if (snd_pcm_running(substream)) {
1da177e4 757 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 758 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
759 status->tstamp = runtime->status->tstamp;
3179f620 760 status->driver_tstamp = runtime->driver_tstamp;
4eeaaeae
PLB		 761 status->audio_tstamp =
762 runtime->status->audio_tstamp;
3179f620
PLB		 763 if (runtime->audio_tstamp_report.valid == 1)
764 /* backwards compatibility, no report provided in COMPAT mode */
765 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data,
766 &status->audio_tstamp_accuracy,
767 &runtime->audio_tstamp_report);
768
8c121586
JK		 769 goto _tstamp_end;
770 }
0d59b814
PLB		 771 } else {
772 /* get tstamp only in fallback mode and only if enabled */
773 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
774 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 775 }
8c121586 776 _tstamp_end:
1da177e4
LT		 777 status->appl_ptr = runtime->control->appl_ptr;
778 status->hw_ptr = runtime->status->hw_ptr;
779 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
780 status->avail = snd_pcm_playback_avail(runtime);
781 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 782 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 783 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 784 status->delay += runtime->delay;
785 } else
1da177e4
LT		 786 status->delay = 0;
787 } else {
788 status->avail = snd_pcm_capture_avail(runtime);
789 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 790 status->delay = status->avail + runtime->delay;
1da177e4
LT		 791 else
792 status->delay = 0;
793 }
794 status->avail_max = runtime->avail_max;
795 status->overrange = runtime->overrange;
796 runtime->avail_max = 0;
797 runtime->overrange = 0;
798 _end:
799 snd_pcm_stream_unlock_irq(substream);
800 return 0;
801}
802
877211f5 803static int snd_pcm_status_user(struct snd_pcm_substream *substream,
38ca2a4d
PLB		 804 struct snd_pcm_status __user * _status,
805 bool ext)
1da177e4 806{
877211f5 807 struct snd_pcm_status status;
1da177e4 808 int res;
38ca2a4d 809
1da177e4 810 memset(&status, 0, sizeof(status));
38ca2a4d
PLB		 811 /*
812 * with extension, parameters are read/write,
813 * get audio_tstamp_data from user,
814 * ignore rest of status structure
815 */
816 if (ext && get_user(status.audio_tstamp_data,
817 (u32 __user *)(&_status->audio_tstamp_data)))
818 return -EFAULT;
1da177e4
LT		 819 res = snd_pcm_status(substream, &status);
820 if (res < 0)
821 return res;
822 if (copy_to_user(_status, &status, sizeof(status)))
823 return -EFAULT;
824 return 0;
825}
826
877211f5
TI		 827static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
828 struct snd_pcm_channel_info * info)
1da177e4 829{
877211f5 830 struct snd_pcm_runtime *runtime;
1da177e4
LT		 831 unsigned int channel;
832
1da177e4
LT		 833 channel = info->channel;
834 runtime = substream->runtime;
835 snd_pcm_stream_lock_irq(substream);
836 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
837 snd_pcm_stream_unlock_irq(substream);
838 return -EBADFD;
839 }
840 snd_pcm_stream_unlock_irq(substream);
841 if (channel >= runtime->channels)
842 return -EINVAL;
843 memset(info, 0, sizeof(*info));
844 info->channel = channel;
845 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
846}
847
877211f5
TI		 848static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
849 struct snd_pcm_channel_info __user * _info)
1da177e4 850{
877211f5 851 struct snd_pcm_channel_info info;
1da177e4
LT		 852 int res;
853
854 if (copy_from_user(&info, _info, sizeof(info)))
855 return -EFAULT;
856 res = snd_pcm_channel_info(substream, &info);
857 if (res < 0)
858 return res;
859 if (copy_to_user(_info, &info, sizeof(info)))
860 return -EFAULT;
861 return 0;
862}
863
877211f5 864static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 865{
877211f5 866 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 867 if (runtime->trigger_master == NULL)
868 return;
869 if (runtime->trigger_master == substream) {
2b79d7a6
PLB		 870 if (!runtime->trigger_tstamp_latched)
871 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 872 } else {
873 snd_pcm_trigger_tstamp(runtime->trigger_master);
874 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
875 }
876 runtime->trigger_master = NULL;
877}
878
879struct action_ops {
877211f5
TI		 880 int (*pre_action)(struct snd_pcm_substream *substream, int state);
881 int (*do_action)(struct snd_pcm_substream *substream, int state);
882 void (*undo_action)(struct snd_pcm_substream *substream, int state);
883 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 884};
885
886/*
887 * this functions is core for handling of linked stream
888 * Note: the stream state might be changed also on failure
889 * Note2: call with calling stream lock + link lock
890 */
b17154cf 891static int snd_pcm_action_group(const struct action_ops *ops,
877211f5 892 struct snd_pcm_substream *substream,
1da177e4
LT		 893 int state, int do_lock)
894{
877211f5
TI		 895 struct snd_pcm_substream *s = NULL;
896 struct snd_pcm_substream *s1;
dde1c652 897 int res = 0, depth = 1;
1da177e4 898
ef991b95 899 snd_pcm_group_for_each_entry(s, substream) {
257f8cce
TI		 900 if (do_lock && s != substream) {
901 if (s->pcm->nonatomic)
dde1c652 902 mutex_lock_nested(&s->self_group.mutex, depth);
257f8cce 903 else
dde1c652
TI		 904 spin_lock_nested(&s->self_group.lock, depth);
905 depth++;
257f8cce 906 }
1da177e4
LT		 907 res = ops->pre_action(s, state);
908 if (res < 0)
909 goto _unlock;
910 }
ef991b95 911 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 912 res = ops->do_action(s, state);
913 if (res < 0) {
914 if (ops->undo_action) {
ef991b95 915 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 916 if (s1 == s) /* failed stream */
917 break;
918 ops->undo_action(s1, state);
919 }
920 }
921 s = NULL; /* unlock all */
922 goto _unlock;
923 }
924 }
ef991b95 925 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 926 ops->post_action(s, state);
927 }
928 _unlock:
929 if (do_lock) {
930 /* unlock streams */
ef991b95 931 snd_pcm_group_for_each_entry(s1, substream) {
257f8cce 932 if (s1 != substream) {
811deede 933 if (s1->pcm->nonatomic)
257f8cce
TI		 934 mutex_unlock(&s1->self_group.mutex);
935 else
936 spin_unlock(&s1->self_group.lock);
937 }
1da177e4
LT		 938 if (s1 == s) /* end */
939 break;
940 }
941 }
942 return res;
943}
944
945/*
946 * Note: call with stream lock
947 */
b17154cf 948static int snd_pcm_action_single(const struct action_ops *ops,
877211f5 949 struct snd_pcm_substream *substream,
1da177e4
LT		 950 int state)
951{
952 int res;
953
954 res = ops->pre_action(substream, state);
955 if (res < 0)
956 return res;
957 res = ops->do_action(substream, state);
958 if (res == 0)
959 ops->post_action(substream, state);
960 else if (ops->undo_action)
961 ops->undo_action(substream, state);
962 return res;
963}
964
aa8edd8c
TI		 965/*
966 * Note: call with stream lock
967 */
b17154cf 968static int snd_pcm_action(const struct action_ops *ops,
aa8edd8c
TI		 969 struct snd_pcm_substream *substream,
970 int state)
257f8cce
TI		 971{
972 int res;
973
aa8edd8c
TI		 974 if (!snd_pcm_stream_linked(substream))
975 return snd_pcm_action_single(ops, substream, state);
976
977 if (substream->pcm->nonatomic) {
257f8cce
TI		 978 if (!mutex_trylock(&substream->group->mutex)) {
979 mutex_unlock(&substream->self_group.mutex);
980 mutex_lock(&substream->group->mutex);
981 mutex_lock(&substream->self_group.mutex);
982 }
983 res = snd_pcm_action_group(ops, substream, state, 1);
984 mutex_unlock(&substream->group->mutex);
985 } else {
1da177e4
LT		 986 if (!spin_trylock(&substream->group->lock)) {
987 spin_unlock(&substream->self_group.lock);
988 spin_lock(&substream->group->lock);
989 spin_lock(&substream->self_group.lock);
990 }
991 res = snd_pcm_action_group(ops, substream, state, 1);
992 spin_unlock(&substream->group->lock);
1da177e4
LT		 993 }
994 return res;
995}
996
997/*
998 * Note: don't use any locks before
999 */
b17154cf 1000static int snd_pcm_action_lock_irq(const struct action_ops *ops,
877211f5 1001 struct snd_pcm_substream *substream,
1da177e4
LT		 1002 int state)
1003{
1004 int res;
1005
e3a4bd5e
TI		 1006 snd_pcm_stream_lock_irq(substream);
1007 res = snd_pcm_action(ops, substream, state);
1008 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 1009 return res;
1010}
1011
1012/*
1013 */
b17154cf 1014static int snd_pcm_action_nonatomic(const struct action_ops *ops,
877211f5 1015 struct snd_pcm_substream *substream,
1da177e4
LT		 1016 int state)
1017{
1018 int res;
1019
1020 down_read(&snd_pcm_link_rwsem);
1021 if (snd_pcm_stream_linked(substream))
1022 res = snd_pcm_action_group(ops, substream, state, 0);
1023 else
1024 res = snd_pcm_action_single(ops, substream, state);
1025 up_read(&snd_pcm_link_rwsem);
1026 return res;
1027}
1028
1029/*
1030 * start callbacks
1031 */
877211f5 1032static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 1033{
877211f5 1034 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1035 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
1036 return -EBADFD;
1037 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1038 !snd_pcm_playback_data(substream))
1039 return -EPIPE;
2b79d7a6 1040 runtime->trigger_tstamp_latched = false;
1da177e4
LT		 1041 runtime->trigger_master = substream;
1042 return 0;
1043}
1044
877211f5 1045static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1046{
1047 if (substream->runtime->trigger_master != substream)
1048 return 0;
1049 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1050}
1051
877211f5 1052static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1053{
1054 if (substream->runtime->trigger_master == substream)
1055 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1056}
1057
877211f5 1058static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 1059{
877211f5 1060 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1061 snd_pcm_trigger_tstamp(substream);
6af3fb72 1062 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 1063 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1064 runtime->rate;
1da177e4
LT		 1065 runtime->status->state = state;
1066 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1067 runtime->silence_size > 0)
1068 snd_pcm_playback_silence(substream, ULONG_MAX);
90bbaf66 1069 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
1da177e4
LT		 1070}
1071
b17154cf 1072static const struct action_ops snd_pcm_action_start = {
1da177e4
LT		 1073 .pre_action = snd_pcm_pre_start,
1074 .do_action = snd_pcm_do_start,
1075 .undo_action = snd_pcm_undo_start,
1076 .post_action = snd_pcm_post_start
1077};
1078
1079/**
1c85cc64 1080 * snd_pcm_start - start all linked streams
df8db936 1081 * @substream: the PCM substream instance
eb7c06e8
YB		 1082 *
1083 * Return: Zero if successful, or a negative error code.
1da177e4 1084 */
877211f5 1085int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 1086{
877211f5
TI		 1087 return snd_pcm_action(&snd_pcm_action_start, substream,
1088 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 1089}
1090
1091/*
1092 * stop callbacks
1093 */
877211f5 1094static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1095{
877211f5 1096 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1097 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1098 return -EBADFD;
1099 runtime->trigger_master = substream;
1100 return 0;
1101}
1102
877211f5 1103static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1104{
1105 if (substream->runtime->trigger_master == substream &&
1106 snd_pcm_running(substream))
1107 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1108 return 0; /* unconditonally stop all substreams */
1109}
1110
877211f5 1111static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1112{
877211f5 1113 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1114 if (runtime->status->state != state) {
1115 snd_pcm_trigger_tstamp(substream);
9bc889b4 1116 runtime->status->state = state;
90bbaf66 1117 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
1da177e4
LT		 1118 }
1119 wake_up(&runtime->sleep);
c91a988d 1120 wake_up(&runtime->tsleep);
1da177e4
LT		 1121}
1122
b17154cf 1123static const struct action_ops snd_pcm_action_stop = {
1da177e4
LT		 1124 .pre_action = snd_pcm_pre_stop,
1125 .do_action = snd_pcm_do_stop,
1126 .post_action = snd_pcm_post_stop
1127};
1128
1129/**
1c85cc64 1130 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 1131 * @substream: the PCM substream instance
1132 * @state: PCM state after stopping the stream
1da177e4 1133 *
1c85cc64 1134 * The state of each stream is then changed to the given state unconditionally.
eb7c06e8 1135 *
0a11458c 1136 * Return: Zero if successful, or a negative error code.
1da177e4 1137 */
fea952e5 1138int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 1139{
1140 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1141}
1142
e88e8ae6
TI		 1143EXPORT_SYMBOL(snd_pcm_stop);
1144
1da177e4 1145/**
1c85cc64 1146 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 1147 * @substream: the PCM substream
1da177e4 1148 *
1c85cc64 1149 * After stopping, the state is changed to SETUP.
1da177e4 1150 * Unlike snd_pcm_stop(), this affects only the given stream.
eb7c06e8
YB		 1151 *
1152 * Return: Zero if succesful, or a negative error code.
1da177e4 1153 */
877211f5 1154int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 1155{
877211f5
TI		 1156 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1157 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 1158}
1159
1fb8510c
TI		 1160/**
1161 * snd_pcm_stop_xrun - stop the running streams as XRUN
1162 * @substream: the PCM substream instance
1fb8510c
TI		 1163 *
1164 * This stops the given running substream (and all linked substreams) as XRUN.
1165 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1166 *
1167 * Return: Zero if successful, or a negative error code.
1168 */
1169int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1170{
1171 unsigned long flags;
1172 int ret = 0;
1173
1174 snd_pcm_stream_lock_irqsave(substream, flags);
1175 if (snd_pcm_running(substream))
1176 ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1177 snd_pcm_stream_unlock_irqrestore(substream, flags);
1178 return ret;
1179}
1180EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1181
1da177e4
LT		 1182/*
1183 * pause callbacks
1184 */
877211f5 1185static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1186{
877211f5 1187 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1188 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1189 return -ENOSYS;
1190 if (push) {
1191 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1192 return -EBADFD;
1193 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1194 return -EBADFD;
1195 runtime->trigger_master = substream;
1196 return 0;
1197}
1198
877211f5 1199static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1200{
1201 if (substream->runtime->trigger_master != substream)
1202 return 0;
56385a12
JK		 1203 /* some drivers might use hw_ptr to recover from the pause -
1204 update the hw_ptr now */
1205 if (push)
1206 snd_pcm_update_hw_ptr(substream);
6af3fb72 1207 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 1208 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1209 * delta, effectively to skip the check once.
1210 */
1211 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 1212 return substream->ops->trigger(substream,
1213 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1214 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1215}
1216
877211f5 1217static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1218{
1219 if (substream->runtime->trigger_master == substream)
1220 substream->ops->trigger(substream,
1221 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1222 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1223}
1224
877211f5 1225static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1226{
877211f5 1227 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1228 snd_pcm_trigger_tstamp(substream);
1229 if (push) {
1230 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
90bbaf66 1231 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
1da177e4 1232 wake_up(&runtime->sleep);
c91a988d 1233 wake_up(&runtime->tsleep);
1da177e4
LT		 1234 } else {
1235 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
90bbaf66 1236 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
1da177e4
LT		 1237 }
1238}
1239
b17154cf 1240static const struct action_ops snd_pcm_action_pause = {
1da177e4
LT		 1241 .pre_action = snd_pcm_pre_pause,
1242 .do_action = snd_pcm_do_pause,
1243 .undo_action = snd_pcm_undo_pause,
1244 .post_action = snd_pcm_post_pause
1245};
1246
1247/*
1248 * Push/release the pause for all linked streams.
1249 */
877211f5 1250static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1251{
1252 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1253}
1254
1255#ifdef CONFIG_PM
1256/* suspend */
1257
877211f5 1258static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1259{
877211f5 1260 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1261 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1262 return -EBUSY;
1263 runtime->trigger_master = substream;
1264 return 0;
1265}
1266
877211f5 1267static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1268{
877211f5 1269 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1270 if (runtime->trigger_master != substream)
1271 return 0;
1272 if (! snd_pcm_running(substream))
1273 return 0;
1274 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1275 return 0; /* suspend unconditionally */
1276}
1277
877211f5 1278static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1279{
877211f5 1280 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1281 snd_pcm_trigger_tstamp(substream);
9bc889b4
TI		 1282 runtime->status->suspended_state = runtime->status->state;
1283 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
90bbaf66 1284 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
1da177e4 1285 wake_up(&runtime->sleep);
c91a988d 1286 wake_up(&runtime->tsleep);
1da177e4
LT		 1287}
1288
b17154cf 1289static const struct action_ops snd_pcm_action_suspend = {
1da177e4
LT		 1290 .pre_action = snd_pcm_pre_suspend,
1291 .do_action = snd_pcm_do_suspend,
1292 .post_action = snd_pcm_post_suspend
1293};
1294
1295/**
1c85cc64 1296 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1297 * @substream: the PCM substream
1da177e4 1298 *
1da177e4 1299 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1300 *
1301 * Return: Zero if successful (or @substream is %NULL), or a negative error
1302 * code.
1da177e4 1303 */
877211f5 1304int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1305{
1306 int err;
1307 unsigned long flags;
1308
603bf524
TI		 1309 if (! substream)
1310 return 0;
1311
1da177e4
LT		 1312 snd_pcm_stream_lock_irqsave(substream, flags);
1313 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1314 snd_pcm_stream_unlock_irqrestore(substream, flags);
1315 return err;
1316}
1317
e88e8ae6
TI		 1318EXPORT_SYMBOL(snd_pcm_suspend);
1319
1da177e4 1320/**
1c85cc64 1321 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1322 * @pcm: the PCM instance
1da177e4 1323 *
1da177e4 1324 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1325 *
1326 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1da177e4 1327 */
877211f5 1328int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1329{
877211f5 1330 struct snd_pcm_substream *substream;
1da177e4
LT		 1331 int stream, err = 0;
1332
603bf524
TI		 1333 if (! pcm)
1334 return 0;
1335
1da177e4 1336 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1337 for (substream = pcm->streams[stream].substream;
1338 substream; substream = substream->next) {
1da177e4
LT		 1339 /* FIXME: the open/close code should lock this as well */
1340 if (substream->runtime == NULL)
1341 continue;
1342 err = snd_pcm_suspend(substream);
1343 if (err < 0 && err != -EBUSY)
1344 return err;
1345 }
1346 }
1347 return 0;
1348}
1349
e88e8ae6
TI		 1350EXPORT_SYMBOL(snd_pcm_suspend_all);
1351
1da177e4
LT		 1352/* resume */
1353
877211f5 1354static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1355{
877211f5 1356 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1357 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1358 return -ENOSYS;
1359 runtime->trigger_master = substream;
1360 return 0;
1361}
1362
877211f5 1363static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1364{
877211f5 1365 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1366 if (runtime->trigger_master != substream)
1367 return 0;
1368 /* DMA not running previously? */
1369 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1370 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1371 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1372 return 0;
1373 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1374}
1375
877211f5 1376static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1377{
1378 if (substream->runtime->trigger_master == substream &&
1379 snd_pcm_running(substream))
1380 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1381}
1382
877211f5 1383static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1384{
877211f5 1385 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1386 snd_pcm_trigger_tstamp(substream);
9bc889b4 1387 runtime->status->state = runtime->status->suspended_state;
90bbaf66 1388 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
1da177e4
LT		 1389}
1390
b17154cf 1391static const struct action_ops snd_pcm_action_resume = {
1da177e4
LT		 1392 .pre_action = snd_pcm_pre_resume,
1393 .do_action = snd_pcm_do_resume,
1394 .undo_action = snd_pcm_undo_resume,
1395 .post_action = snd_pcm_post_resume
1396};
1397
877211f5 1398static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1399{
877211f5 1400 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1401 int res;
1402
1403 snd_power_lock(card);
cbac4b0c 1404 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1405 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1406 snd_power_unlock(card);
1407 return res;
1408}
1409
1410#else
1411
877211f5 1412static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1413{
1414 return -ENOSYS;
1415}
1416
1417#endif /* CONFIG_PM */
1418
1419/*
1420 * xrun ioctl
1421 *
1422 * Change the RUNNING stream(s) to XRUN state.
1423 */
877211f5 1424static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1425{
877211f5
TI		 1426 struct snd_card *card = substream->pcm->card;
1427 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1428 int result;
1429
1430 snd_power_lock(card);
1431 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1432 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1433 if (result < 0)
1434 goto _unlock;
1435 }
1436
1437 snd_pcm_stream_lock_irq(substream);
1438 switch (runtime->status->state) {
1439 case SNDRV_PCM_STATE_XRUN:
1440 result = 0; /* already there */
1441 break;
1442 case SNDRV_PCM_STATE_RUNNING:
1443 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1444 break;
1445 default:
1446 result = -EBADFD;
1447 }
1448 snd_pcm_stream_unlock_irq(substream);
1449 _unlock:
1450 snd_power_unlock(card);
1451 return result;
1452}
1453
1454/*
1455 * reset ioctl
1456 */
877211f5 1457static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1458{
877211f5 1459 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1460 switch (runtime->status->state) {
1461 case SNDRV_PCM_STATE_RUNNING:
1462 case SNDRV_PCM_STATE_PREPARED:
1463 case SNDRV_PCM_STATE_PAUSED:
1464 case SNDRV_PCM_STATE_SUSPENDED:
1465 return 0;
1466 default:
1467 return -EBADFD;
1468 }
1469}
1470
877211f5 1471static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1472{
877211f5 1473 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1474 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1475 if (err < 0)
1476 return err;
1da177e4 1477 runtime->hw_ptr_base = 0;
e7636925
JK		 1478 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1479 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1480 runtime->silence_start = runtime->status->hw_ptr;
1481 runtime->silence_filled = 0;
1482 return 0;
1483}
1484
877211f5 1485static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1486{
877211f5 1487 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1488 runtime->control->appl_ptr = runtime->status->hw_ptr;
1489 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1490 runtime->silence_size > 0)
1491 snd_pcm_playback_silence(substream, ULONG_MAX);
1492}
1493
b17154cf 1494static const struct action_ops snd_pcm_action_reset = {
1da177e4
LT		 1495 .pre_action = snd_pcm_pre_reset,
1496 .do_action = snd_pcm_do_reset,
1497 .post_action = snd_pcm_post_reset
1498};
1499
877211f5 1500static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1501{
1502 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1503}
1504
1505/*
1506 * prepare ioctl
1507 */
0df63e44
TI		 1508/* we use the second argument for updating f_flags */
1509static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1510 int f_flags)
1da177e4 1511{
877211f5 1512 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1513 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1514 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1515 return -EBADFD;
1516 if (snd_pcm_running(substream))
1517 return -EBUSY;
0df63e44 1518 substream->f_flags = f_flags;
1da177e4
LT		 1519 return 0;
1520}
1521
877211f5 1522static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1523{
1524 int err;
1525 err = substream->ops->prepare(substream);
1526 if (err < 0)
1527 return err;
1528 return snd_pcm_do_reset(substream, 0);
1529}
1530
877211f5 1531static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1532{
877211f5 1533 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1534 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1535 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1536}
1537
b17154cf 1538static const struct action_ops snd_pcm_action_prepare = {
1da177e4
LT		 1539 .pre_action = snd_pcm_pre_prepare,
1540 .do_action = snd_pcm_do_prepare,
1541 .post_action = snd_pcm_post_prepare
1542};
1543
1544/**
1c85cc64 1545 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1546 * @substream: the PCM substream instance
0df63e44 1547 * @file: file to refer f_flags
eb7c06e8
YB		 1548 *
1549 * Return: Zero if successful, or a negative error code.
1da177e4 1550 */
0df63e44
TI		 1551static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1552 struct file *file)
1da177e4
LT		 1553{
1554 int res;
877211f5 1555 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1556 int f_flags;
1557
1558 if (file)
1559 f_flags = file->f_flags;
1560 else
1561 f_flags = substream->f_flags;
1da177e4
LT		 1562
1563 snd_power_lock(card);
cbac4b0c 1564 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1565 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1566 substream, f_flags);
1da177e4
LT		 1567 snd_power_unlock(card);
1568 return res;
1569}
1570
1571/*
1572 * drain ioctl
1573 */
1574
877211f5 1575static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1576{
4f7c39dc
TI		 1577 struct snd_pcm_runtime *runtime = substream->runtime;
1578 switch (runtime->status->state) {
1579 case SNDRV_PCM_STATE_OPEN:
1580 case SNDRV_PCM_STATE_DISCONNECTED:
1581 case SNDRV_PCM_STATE_SUSPENDED:
1582 return -EBADFD;
1583 }
1584 runtime->trigger_master = substream;
1da177e4
LT		 1585 return 0;
1586}
1587
877211f5 1588static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1589{
877211f5 1590 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1591 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1592 switch (runtime->status->state) {
1593 case SNDRV_PCM_STATE_PREPARED:
1594 /* start playback stream if possible */
1595 if (! snd_pcm_playback_empty(substream)) {
1596 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1597 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
70372a75
TI		 1598 } else {
1599 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1da177e4
LT		 1600 }
1601 break;
1602 case SNDRV_PCM_STATE_RUNNING:
1603 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1604 break;
4f7c39dc
TI		 1605 case SNDRV_PCM_STATE_XRUN:
1606 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1607 break;
1da177e4
LT		 1608 default:
1609 break;
1610 }
1611 } else {
1612 /* stop running stream */
1613 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1614 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1615 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1616 snd_pcm_do_stop(substream, new_state);
1617 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1618 }
1619 }
48d88297
LY		 1620
1621 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1622 runtime->trigger_master == substream &&
1623 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1624 return substream->ops->trigger(substream,
1625 SNDRV_PCM_TRIGGER_DRAIN);
1626
1da177e4
LT		 1627 return 0;
1628}
1629
877211f5 1630static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1631{
1632}
1633
b17154cf 1634static const struct action_ops snd_pcm_action_drain_init = {
1da177e4
LT		 1635 .pre_action = snd_pcm_pre_drain_init,
1636 .do_action = snd_pcm_do_drain_init,
1637 .post_action = snd_pcm_post_drain_init
1638};
1639
877211f5 1640static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1641
1642/*
1643 * Drain the stream(s).
1644 * When the substream is linked, sync until the draining of all playback streams
1645 * is finished.
1646 * After this call, all streams are supposed to be either SETUP or DRAINING
1647 * (capture only) state.
1648 */
4cdc115f
TI		 1649static int snd_pcm_drain(struct snd_pcm_substream *substream,
1650 struct file *file)
1da177e4 1651{
877211f5
TI		 1652 struct snd_card *card;
1653 struct snd_pcm_runtime *runtime;
ef991b95 1654 struct snd_pcm_substream *s;
d3a7dcfe 1655 wait_queue_t wait;
1da177e4 1656 int result = 0;
4cdc115f 1657 int nonblock = 0;
1da177e4 1658
1da177e4
LT		 1659 card = substream->pcm->card;
1660 runtime = substream->runtime;
1661
1662 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1663 return -EBADFD;
1664
1da177e4
LT		 1665 snd_power_lock(card);
1666 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1667 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1668 if (result < 0) {
1669 snd_power_unlock(card);
1670 return result;
1671 }
1da177e4
LT		 1672 }
1673
4cdc115f
TI		 1674 if (file) {
1675 if (file->f_flags & O_NONBLOCK)
1676 nonblock = 1;
1677 } else if (substream->f_flags & O_NONBLOCK)
1678 nonblock = 1;
1679
21cb2a2e 1680 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1681 snd_pcm_stream_lock_irq(substream);
1682 /* resume pause */
d3a7dcfe 1683 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1684 snd_pcm_pause(substream, 0);
1685
1686 /* pre-start/stop - all running streams are changed to DRAINING state */
1687 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1688 if (result < 0)
1689 goto unlock;
1690 /* in non-blocking, we don't wait in ioctl but let caller poll */
1691 if (nonblock) {
1692 result = -EAGAIN;
1693 goto unlock;
21cb2a2e 1694 }
1da177e4
LT		 1695
1696 for (;;) {
1697 long tout;
d3a7dcfe 1698 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1699 if (signal_pending(current)) {
1700 result = -ERESTARTSYS;
1701 break;
1702 }
d3a7dcfe
TI		 1703 /* find a substream to drain */
1704 to_check = NULL;
1705 snd_pcm_group_for_each_entry(s, substream) {
1706 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1707 continue;
1708 runtime = s->runtime;
1709 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1710 to_check = runtime;
21cb2a2e 1711 break;
d3a7dcfe 1712 }
21cb2a2e 1713 }
d3a7dcfe
TI		 1714 if (!to_check)
1715 break; /* all drained */
1716 init_waitqueue_entry(&wait, current);
1717 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1718 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1719 up_read(&snd_pcm_link_rwsem);
1da177e4 1720 snd_power_unlock(card);
f2b3614c
TI		 1721 if (runtime->no_period_wakeup)
1722 tout = MAX_SCHEDULE_TIMEOUT;
1723 else {
1724 tout = 10;
1725 if (runtime->rate) {
1726 long t = runtime->period_size * 2 / runtime->rate;
1727 tout = max(t, tout);
1728 }
1729 tout = msecs_to_jiffies(tout * 1000);
1730 }
1731 tout = schedule_timeout_interruptible(tout);
1da177e4 1732 snd_power_lock(card);
d3a7dcfe 1733 down_read(&snd_pcm_link_rwsem);
1da177e4 1734 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1735 remove_wait_queue(&to_check->sleep, &wait);
0914f796
TI		 1736 if (card->shutdown) {
1737 result = -ENODEV;
1738 break;
1739 }
1da177e4
LT		 1740 if (tout == 0) {
1741 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1742 result = -ESTRPIPE;
1743 else {
09e56df8
TI		 1744 dev_dbg(substream->pcm->card->dev,
1745 "playback drain error (DMA or IRQ trouble?)\n");
1da177e4
LT		 1746 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1747 result = -EIO;
1748 }
1749 break;
1750 }
1da177e4 1751 }
21cb2a2e 1752
4cdc115f 1753 unlock:
21cb2a2e 1754 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1755 up_read(&snd_pcm_link_rwsem);
1da177e4 1756 snd_power_unlock(card);
1da177e4
LT		 1757
1758 return result;
1759}
1760
1761/*
1762 * drop ioctl
1763 *
1764 * Immediately put all linked substreams into SETUP state.
1765 */
877211f5 1766static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1767{
877211f5 1768 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1769 int result = 0;
1770
7eaa943c
TI		 1771 if (PCM_RUNTIME_CHECK(substream))
1772 return -ENXIO;
1da177e4 1773 runtime = substream->runtime;
1da177e4 1774
de1b8b93 1775 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1776 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1777 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1778 return -EBADFD;
1779
1da177e4
LT		 1780 snd_pcm_stream_lock_irq(substream);
1781 /* resume pause */
1782 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1783 snd_pcm_pause(substream, 0);
1784
1785 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1786 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1787 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1788
1da177e4
LT		 1789 return result;
1790}
1791
1792
0888c321 1793static bool is_pcm_file(struct file *file)
1da177e4 1794{
0888c321 1795 struct inode *inode = file_inode(file);
f87135f5
CL		 1796 unsigned int minor;
1797
0888c321
AV		 1798 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1799 return false;
1da177e4 1800 minor = iminor(inode);
0888c321
AV		 1801 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1802 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1da177e4
LT		 1803}
1804
1805/*
1806 * PCM link handling
1807 */
877211f5 1808static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1809{
1810 int res = 0;
877211f5
TI		 1811 struct snd_pcm_file *pcm_file;
1812 struct snd_pcm_substream *substream1;
1662591b 1813 struct snd_pcm_group *group;
0888c321 1814 struct fd f = fdget(fd);
1da177e4 1815
0888c321 1816 if (!f.file)
1da177e4 1817 return -EBADFD;
0888c321
AV		 1818 if (!is_pcm_file(f.file)) {
1819 res = -EBADFD;
1820 goto _badf;
1821 }
1822 pcm_file = f.file->private_data;
1da177e4 1823 substream1 = pcm_file->substream;
1662591b
TI		 1824 group = kmalloc(sizeof(*group), GFP_KERNEL);
1825 if (!group) {
1826 res = -ENOMEM;
1827 goto _nolock;
1828 }
67ec1072 1829 down_write_nonblock(&snd_pcm_link_rwsem);
1da177e4
LT		 1830 write_lock_irq(&snd_pcm_link_rwlock);
1831 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
257f8cce
TI		 1832 substream->runtime->status->state != substream1->runtime->status->state ||
1833 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1da177e4
LT		 1834 res = -EBADFD;
1835 goto _end;
1836 }
1837 if (snd_pcm_stream_linked(substream1)) {
1838 res = -EALREADY;
1839 goto _end;
1840 }
1841 if (!snd_pcm_stream_linked(substream)) {
1662591b 1842 substream->group = group;
dd6c5cd8 1843 group = NULL;
1da177e4 1844 spin_lock_init(&substream->group->lock);
257f8cce 1845 mutex_init(&substream->group->mutex);
1da177e4
LT		 1846 INIT_LIST_HEAD(&substream->group->substreams);
1847 list_add_tail(&substream->link_list, &substream->group->substreams);
1848 substream->group->count = 1;
1849 }
1850 list_add_tail(&substream1->link_list, &substream->group->substreams);
1851 substream->group->count++;
1852 substream1->group = substream->group;
1853 _end:
1854 write_unlock_irq(&snd_pcm_link_rwlock);
1855 up_write(&snd_pcm_link_rwsem);
1662591b 1856 _nolock:
a0830dbd 1857 snd_card_unref(substream1->pcm->card);
dd6c5cd8 1858 kfree(group);
0888c321
AV		 1859 _badf:
1860 fdput(f);
1da177e4
LT		 1861 return res;
1862}
1863
877211f5 1864static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1865{
1866 substream->group = &substream->self_group;
1867 INIT_LIST_HEAD(&substream->self_group.substreams);
1868 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1869}
1870
877211f5 1871static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1872{
ef991b95 1873 struct snd_pcm_substream *s;
1da177e4
LT		 1874 int res = 0;
1875
67ec1072 1876 down_write_nonblock(&snd_pcm_link_rwsem);
1da177e4
LT		 1877 write_lock_irq(&snd_pcm_link_rwlock);
1878 if (!snd_pcm_stream_linked(substream)) {
1879 res = -EALREADY;
1880 goto _end;
1881 }
1882 list_del(&substream->link_list);
1883 substream->group->count--;
1884 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1885 snd_pcm_group_for_each_entry(s, substream) {
1886 relink_to_local(s);
1da177e4
LT		 1887 break;
1888 }
1889 kfree(substream->group);
1890 }
1891 relink_to_local(substream);
1892 _end:
1893 write_unlock_irq(&snd_pcm_link_rwlock);
1894 up_write(&snd_pcm_link_rwsem);
1895 return res;
1896}
1897
1898/*
1899 * hw configurator
1900 */
877211f5
TI		 1901static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1902 struct snd_pcm_hw_rule *rule)
1da177e4 1903{
877211f5 1904 struct snd_interval t;
1da177e4
LT		 1905 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1906 hw_param_interval_c(params, rule->deps[1]), &t);
1907 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1908}
1909
877211f5
TI		 1910static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1911 struct snd_pcm_hw_rule *rule)
1da177e4 1912{
877211f5 1913 struct snd_interval t;
1da177e4
LT		 1914 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1915 hw_param_interval_c(params, rule->deps[1]), &t);
1916 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1917}
1918
877211f5
TI		 1919static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1920 struct snd_pcm_hw_rule *rule)
1da177e4 1921{
877211f5 1922 struct snd_interval t;
1da177e4
LT		 1923 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1924 hw_param_interval_c(params, rule->deps[1]),
1925 (unsigned long) rule->private, &t);
1926 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1927}
1928
877211f5
TI		 1929static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1930 struct snd_pcm_hw_rule *rule)
1da177e4 1931{
877211f5 1932 struct snd_interval t;
1da177e4
LT		 1933 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1934 (unsigned long) rule->private,
1935 hw_param_interval_c(params, rule->deps[1]), &t);
1936 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1937}
1938
877211f5
TI		 1939static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1940 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1941{
1942 unsigned int k;
877211f5
TI		 1943 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1944 struct snd_mask m;
1945 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1946 snd_mask_any(&m);
1947 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1948 int bits;
1949 if (! snd_mask_test(mask, k))
1950 continue;
1951 bits = snd_pcm_format_physical_width(k);
1952 if (bits <= 0)
1953 continue; /* ignore invalid formats */
1954 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1955 snd_mask_reset(&m, k);
1956 }
1957 return snd_mask_refine(mask, &m);
1958}
1959
877211f5
TI		 1960static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1961 struct snd_pcm_hw_rule *rule)
1da177e4 1962{
877211f5 1963 struct snd_interval t;
1da177e4
LT		 1964 unsigned int k;
1965 t.min = UINT_MAX;
1966 t.max = 0;
1967 t.openmin = 0;
1968 t.openmax = 0;
1969 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1970 int bits;
1971 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1972 continue;
1973 bits = snd_pcm_format_physical_width(k);
1974 if (bits <= 0)
1975 continue; /* ignore invalid formats */
1976 if (t.min > (unsigned)bits)
1977 t.min = bits;
1978 if (t.max < (unsigned)bits)
1979 t.max = bits;
1980 }
1981 t.integer = 1;
1982 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1983}
1984
1985#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1986#error "Change this table"
1987#endif
1988
1989static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1990 48000, 64000, 88200, 96000, 176400, 192000 };
1991
7653d557
CL		 1992const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1993 .count = ARRAY_SIZE(rates),
1994 .list = rates,
1995};
1996
877211f5
TI		 1997static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1998 struct snd_pcm_hw_rule *rule)
1da177e4 1999{
877211f5 2000 struct snd_pcm_hardware *hw = rule->private;
1da177e4 2001 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 2002 snd_pcm_known_rates.count,
2003 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 2004}
2005
877211f5
TI		 2006static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
2007 struct snd_pcm_hw_rule *rule)
1da177e4 2008{
877211f5
TI		 2009 struct snd_interval t;
2010 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 2011 t.min = 0;
2012 t.max = substream->buffer_bytes_max;
2013 t.openmin = 0;
2014 t.openmax = 0;
2015 t.integer = 1;
2016 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
2017}
2018
877211f5 2019int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 2020{
877211f5
TI		 2021 struct snd_pcm_runtime *runtime = substream->runtime;
2022 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 2023 int k, err;
2024
2025 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
2026 snd_mask_any(constrs_mask(constrs, k));
2027 }
2028
2029 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
2030 snd_interval_any(constrs_interval(constrs, k));
2031 }
2032
2033 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
2034 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
2035 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
2036 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
2037 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
2038
2039 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2040 snd_pcm_hw_rule_format, NULL,
2041 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2042 if (err < 0)
2043 return err;
2044 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2045 snd_pcm_hw_rule_sample_bits, NULL,
2046 SNDRV_PCM_HW_PARAM_FORMAT,
2047 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2048 if (err < 0)
2049 return err;
2050 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2051 snd_pcm_hw_rule_div, NULL,
2052 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2053 if (err < 0)
2054 return err;
2055 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2056 snd_pcm_hw_rule_mul, NULL,
2057 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2058 if (err < 0)
2059 return err;
2060 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2061 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2062 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2063 if (err < 0)
2064 return err;
2065 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2066 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2067 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2068 if (err < 0)
2069 return err;
2070 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2071 snd_pcm_hw_rule_div, NULL,
2072 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2073 if (err < 0)
2074 return err;
2075 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2076 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2077 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2078 if (err < 0)
2079 return err;
2080 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2081 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2082 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2083 if (err < 0)
2084 return err;
2085 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2086 snd_pcm_hw_rule_div, NULL,
2087 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2088 if (err < 0)
2089 return err;
2090 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2091 snd_pcm_hw_rule_div, NULL,
2092 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2093 if (err < 0)
2094 return err;
2095 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2096 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2097 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2098 if (err < 0)
2099 return err;
2100 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2101 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2102 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2103 if (err < 0)
2104 return err;
2105 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2106 snd_pcm_hw_rule_mul, NULL,
2107 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2108 if (err < 0)
2109 return err;
2110 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2111 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2112 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2113 if (err < 0)
2114 return err;
2115 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2116 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2117 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2118 if (err < 0)
2119 return err;
2120 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2121 snd_pcm_hw_rule_muldivk, (void*) 8,
2122 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2123 if (err < 0)
2124 return err;
2125 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2126 snd_pcm_hw_rule_muldivk, (void*) 8,
2127 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2128 if (err < 0)
2129 return err;
2130 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2131 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2132 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2133 if (err < 0)
2134 return err;
2135 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2136 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2137 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2138 if (err < 0)
2139 return err;
2140 return 0;
2141}
2142
877211f5 2143int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 2144{
877211f5
TI		 2145 struct snd_pcm_runtime *runtime = substream->runtime;
2146 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 2147 int err;
2148 unsigned int mask = 0;
2149
2150 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2151 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2152 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2153 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
63825f3a 2154 if (hw_support_mmap(substream)) {
1da177e4
LT		 2155 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2156 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2157 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2158 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2159 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2160 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2161 }
2162 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 2163 if (err < 0)
2164 return err;
1da177e4
LT		 2165
2166 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 2167 if (err < 0)
2168 return err;
1da177e4
LT		 2169
2170 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 2171 if (err < 0)
2172 return err;
1da177e4
LT		 2173
2174 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2175 hw->channels_min, hw->channels_max);
7eaa943c
TI		 2176 if (err < 0)
2177 return err;
1da177e4
LT		 2178
2179 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2180 hw->rate_min, hw->rate_max);
8b90ca08
GL		 2181 if (err < 0)
2182 return err;
1da177e4
LT		 2183
2184 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2185 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 2186 if (err < 0)
2187 return err;
1da177e4
LT		 2188
2189 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2190 hw->periods_min, hw->periods_max);
7eaa943c
TI		 2191 if (err < 0)
2192 return err;
1da177e4
LT		 2193
2194 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2195 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 2196 if (err < 0)
2197 return err;
1da177e4
LT		 2198
2199 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2200 snd_pcm_hw_rule_buffer_bytes_max, substream,
2201 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2202 if (err < 0)
2203 return err;
2204
2205 /* FIXME: remove */
2206 if (runtime->dma_bytes) {
2207 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c 2208 if (err < 0)
6cf95152 2209 return err;
1da177e4
LT		 2210 }
2211
2212 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2213 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2214 snd_pcm_hw_rule_rate, hw,
2215 SNDRV_PCM_HW_PARAM_RATE, -1);
2216 if (err < 0)
2217 return err;
2218 }
2219
2220 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2221 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2222
2223 return 0;
2224}
2225
3bf75f9b 2226static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2227{
1da177e4 2228 snd_pcm_unlink(substream);
3bf75f9b
TI		 2229}
2230
2231void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2232{
0df63e44
TI		 2233 substream->ref_count--;
2234 if (substream->ref_count > 0)
2235 return;
2236
3bf75f9b 2237 snd_pcm_drop(substream);
3bf75f9b 2238 if (substream->hw_opened) {
094435d4
TI		 2239 if (substream->ops->hw_free &&
2240 substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
1da177e4
LT		 2241 substream->ops->hw_free(substream);
2242 substream->ops->close(substream);
3bf75f9b 2243 substream->hw_opened = 0;
1da177e4 2244 }
8699a0b6
TI		 2245 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2246 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2247 if (substream->pcm_release) {
2248 substream->pcm_release(substream);
2249 substream->pcm_release = NULL;
2250 }
3bf75f9b
TI		 2251 snd_pcm_detach_substream(substream);
2252}
2253
e88e8ae6
TI		 2254EXPORT_SYMBOL(snd_pcm_release_substream);
2255
3bf75f9b
TI		 2256int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2257 struct file *file,
2258 struct snd_pcm_substream **rsubstream)
2259{
2260 struct snd_pcm_substream *substream;
2261 int err;
2262
2263 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2264 if (err < 0)
2265 return err;
0df63e44
TI		 2266 if (substream->ref_count > 1) {
2267 *rsubstream = substream;
2268 return 0;
2269 }
2270
3bf75f9b
TI		 2271 err = snd_pcm_hw_constraints_init(substream);
2272 if (err < 0) {
09e56df8 2273 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
3bf75f9b
TI		 2274 goto error;
2275 }
2276
2277 if ((err = substream->ops->open(substream)) < 0)
2278 goto error;
2279
2280 substream->hw_opened = 1;
2281
2282 err = snd_pcm_hw_constraints_complete(substream);
2283 if (err < 0) {
09e56df8 2284 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
3bf75f9b
TI		 2285 goto error;
2286 }
2287
2288 *rsubstream = substream;
1da177e4 2289 return 0;
3bf75f9b
TI		 2290
2291 error:
2292 snd_pcm_release_substream(substream);
2293 return err;
1da177e4
LT		 2294}
2295
e88e8ae6
TI		 2296EXPORT_SYMBOL(snd_pcm_open_substream);
2297
1da177e4 2298static int snd_pcm_open_file(struct file *file,
877211f5 2299 struct snd_pcm *pcm,
ffd3d5c6 2300 int stream)
1da177e4 2301{
877211f5
TI		 2302 struct snd_pcm_file *pcm_file;
2303 struct snd_pcm_substream *substream;
3bf75f9b 2304 int err;
1da177e4 2305
3bf75f9b
TI		 2306 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2307 if (err < 0)
2308 return err;
2309
548a648b
TI		 2310 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2311 if (pcm_file == NULL) {
2312 snd_pcm_release_substream(substream);
2313 return -ENOMEM;
2314 }
2315 pcm_file->substream = substream;
2316 if (substream->ref_count == 1) {
0df63e44
TI		 2317 substream->file = pcm_file;
2318 substream->pcm_release = pcm_release_private;
1da177e4 2319 }
1da177e4 2320 file->private_data = pcm_file;
ffd3d5c6 2321
1da177e4
LT		 2322 return 0;
2323}
2324
f87135f5
CL		 2325static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2326{
2327 struct snd_pcm *pcm;
02f4865f
TI		 2328 int err = nonseekable_open(inode, file);
2329 if (err < 0)
2330 return err;
f87135f5
CL		 2331 pcm = snd_lookup_minor_data(iminor(inode),
2332 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd 2333 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
8bb4d9ce
TI		 2334 if (pcm)
2335 snd_card_unref(pcm->card);
a0830dbd 2336 return err;
f87135f5
CL		 2337}
2338
2339static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2340{
877211f5 2341 struct snd_pcm *pcm;
02f4865f
TI		 2342 int err = nonseekable_open(inode, file);
2343 if (err < 0)
2344 return err;
f87135f5
CL		 2345 pcm = snd_lookup_minor_data(iminor(inode),
2346 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd 2347 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
8bb4d9ce
TI		 2348 if (pcm)
2349 snd_card_unref(pcm->card);
a0830dbd 2350 return err;
f87135f5
CL		 2351}
2352
2353static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2354{
2355 int err;
1da177e4
LT		 2356 wait_queue_t wait;
2357
1da177e4
LT		 2358 if (pcm == NULL) {
2359 err = -ENODEV;
2360 goto __error1;
2361 }
2362 err = snd_card_file_add(pcm->card, file);
2363 if (err < 0)
2364 goto __error1;
2365 if (!try_module_get(pcm->card->module)) {
2366 err = -EFAULT;
2367 goto __error2;
2368 }
2369 init_waitqueue_entry(&wait, current);
2370 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2371 mutex_lock(&pcm->open_mutex);
1da177e4 2372 while (1) {
ffd3d5c6 2373 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2374 if (err >= 0)
2375 break;
2376 if (err == -EAGAIN) {
2377 if (file->f_flags & O_NONBLOCK) {
2378 err = -EBUSY;
2379 break;
2380 }
2381 } else
2382 break;
2383 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2384 mutex_unlock(&pcm->open_mutex);
1da177e4 2385 schedule();
1a60d4c5 2386 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2387 if (pcm->card->shutdown) {
2388 err = -ENODEV;
2389 break;
2390 }
1da177e4
LT		 2391 if (signal_pending(current)) {
2392 err = -ERESTARTSYS;
2393 break;
2394 }
2395 }
2396 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2397 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2398 if (err < 0)
2399 goto __error;
2400 return err;
2401
2402 __error:
2403 module_put(pcm->card->module);
2404 __error2:
2405 snd_card_file_remove(pcm->card, file);
2406 __error1:
2407 return err;
2408}
2409
2410static int snd_pcm_release(struct inode *inode, struct file *file)
2411{
877211f5
TI		 2412 struct snd_pcm *pcm;
2413 struct snd_pcm_substream *substream;
2414 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2415
2416 pcm_file = file->private_data;
2417 substream = pcm_file->substream;
7eaa943c
TI		 2418 if (snd_BUG_ON(!substream))
2419 return -ENXIO;
1da177e4 2420 pcm = substream->pcm;
1a60d4c5 2421 mutex_lock(&pcm->open_mutex);
3bf75f9b 2422 snd_pcm_release_substream(substream);
548a648b 2423 kfree(pcm_file);
1a60d4c5 2424 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2425 wake_up(&pcm->open_wait);
2426 module_put(pcm->card->module);
2427 snd_card_file_remove(pcm->card, file);
2428 return 0;
2429}
2430
877211f5
TI		 2431static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2432 snd_pcm_uframes_t frames)
1da177e4 2433{
877211f5 2434 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2435 snd_pcm_sframes_t appl_ptr;
2436 snd_pcm_sframes_t ret;
2437 snd_pcm_sframes_t hw_avail;
2438
2439 if (frames == 0)
2440 return 0;
2441
2442 snd_pcm_stream_lock_irq(substream);
2443 switch (runtime->status->state) {
2444 case SNDRV_PCM_STATE_PREPARED:
2445 break;
2446 case SNDRV_PCM_STATE_DRAINING:
2447 case SNDRV_PCM_STATE_RUNNING:
2448 if (snd_pcm_update_hw_ptr(substream) >= 0)
2449 break;
2450 /* Fall through */
2451 case SNDRV_PCM_STATE_XRUN:
2452 ret = -EPIPE;
2453 goto __end;
51840409
LR		 2454 case SNDRV_PCM_STATE_SUSPENDED:
2455 ret = -ESTRPIPE;
2456 goto __end;
1da177e4
LT		 2457 default:
2458 ret = -EBADFD;
2459 goto __end;
2460 }
2461
2462 hw_avail = snd_pcm_playback_hw_avail(runtime);
2463 if (hw_avail <= 0) {
2464 ret = 0;
2465 goto __end;
2466 }
2467 if (frames > (snd_pcm_uframes_t)hw_avail)
2468 frames = hw_avail;
1da177e4
LT		 2469 appl_ptr = runtime->control->appl_ptr - frames;
2470 if (appl_ptr < 0)
2471 appl_ptr += runtime->boundary;
2472 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2473 ret = frames;
2474 __end:
2475 snd_pcm_stream_unlock_irq(substream);
2476 return ret;
2477}
2478
877211f5
TI		 2479static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2480 snd_pcm_uframes_t frames)
1da177e4 2481{
877211f5 2482 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2483 snd_pcm_sframes_t appl_ptr;
2484 snd_pcm_sframes_t ret;
2485 snd_pcm_sframes_t hw_avail;
2486
2487 if (frames == 0)
2488 return 0;
2489
2490 snd_pcm_stream_lock_irq(substream);
2491 switch (runtime->status->state) {
2492 case SNDRV_PCM_STATE_PREPARED:
2493 case SNDRV_PCM_STATE_DRAINING:
2494 break;
2495 case SNDRV_PCM_STATE_RUNNING:
2496 if (snd_pcm_update_hw_ptr(substream) >= 0)
2497 break;
2498 /* Fall through */
2499 case SNDRV_PCM_STATE_XRUN:
2500 ret = -EPIPE;
2501 goto __end;
51840409
LR		 2502 case SNDRV_PCM_STATE_SUSPENDED:
2503 ret = -ESTRPIPE;
2504 goto __end;
1da177e4
LT		 2505 default:
2506 ret = -EBADFD;
2507 goto __end;
2508 }
2509
2510 hw_avail = snd_pcm_capture_hw_avail(runtime);
2511 if (hw_avail <= 0) {
2512 ret = 0;
2513 goto __end;
2514 }
2515 if (frames > (snd_pcm_uframes_t)hw_avail)
2516 frames = hw_avail;
1da177e4
LT		 2517 appl_ptr = runtime->control->appl_ptr - frames;
2518 if (appl_ptr < 0)
2519 appl_ptr += runtime->boundary;
2520 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2521 ret = frames;
2522 __end:
2523 snd_pcm_stream_unlock_irq(substream);
2524 return ret;
2525}
2526
877211f5
TI		 2527static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2528 snd_pcm_uframes_t frames)
1da177e4 2529{
877211f5 2530 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2531 snd_pcm_sframes_t appl_ptr;
2532 snd_pcm_sframes_t ret;
2533 snd_pcm_sframes_t avail;
2534
2535 if (frames == 0)
2536 return 0;
2537
2538 snd_pcm_stream_lock_irq(substream);
2539 switch (runtime->status->state) {
2540 case SNDRV_PCM_STATE_PREPARED:
2541 case SNDRV_PCM_STATE_PAUSED:
2542 break;
2543 case SNDRV_PCM_STATE_DRAINING:
2544 case SNDRV_PCM_STATE_RUNNING:
2545 if (snd_pcm_update_hw_ptr(substream) >= 0)
2546 break;
2547 /* Fall through */
2548 case SNDRV_PCM_STATE_XRUN:
2549 ret = -EPIPE;
2550 goto __end;
51840409
LR		 2551 case SNDRV_PCM_STATE_SUSPENDED:
2552 ret = -ESTRPIPE;
2553 goto __end;
1da177e4
LT		 2554 default:
2555 ret = -EBADFD;
2556 goto __end;
2557 }
2558
2559 avail = snd_pcm_playback_avail(runtime);
2560 if (avail <= 0) {
2561 ret = 0;
2562 goto __end;
2563 }
2564 if (frames > (snd_pcm_uframes_t)avail)
2565 frames = avail;
1da177e4
LT		 2566 appl_ptr = runtime->control->appl_ptr + frames;
2567 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2568 appl_ptr -= runtime->boundary;
2569 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2570 ret = frames;
2571 __end:
2572 snd_pcm_stream_unlock_irq(substream);
2573 return ret;
2574}
2575
877211f5
TI		 2576static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2577 snd_pcm_uframes_t frames)
1da177e4 2578{
877211f5 2579 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2580 snd_pcm_sframes_t appl_ptr;
2581 snd_pcm_sframes_t ret;
2582 snd_pcm_sframes_t avail;
2583
2584 if (frames == 0)
2585 return 0;
2586
2587 snd_pcm_stream_lock_irq(substream);
2588 switch (runtime->status->state) {
2589 case SNDRV_PCM_STATE_PREPARED:
2590 case SNDRV_PCM_STATE_DRAINING:
2591 case SNDRV_PCM_STATE_PAUSED:
2592 break;
2593 case SNDRV_PCM_STATE_RUNNING:
2594 if (snd_pcm_update_hw_ptr(substream) >= 0)
2595 break;
2596 /* Fall through */
2597 case SNDRV_PCM_STATE_XRUN:
2598 ret = -EPIPE;
2599 goto __end;
51840409
LR		 2600 case SNDRV_PCM_STATE_SUSPENDED:
2601 ret = -ESTRPIPE;
2602 goto __end;
1da177e4
LT		 2603 default:
2604 ret = -EBADFD;
2605 goto __end;
2606 }
2607
2608 avail = snd_pcm_capture_avail(runtime);
2609 if (avail <= 0) {
2610 ret = 0;
2611 goto __end;
2612 }
2613 if (frames > (snd_pcm_uframes_t)avail)
2614 frames = avail;
1da177e4
LT		 2615 appl_ptr = runtime->control->appl_ptr + frames;
2616 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2617 appl_ptr -= runtime->boundary;
2618 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2619 ret = frames;
2620 __end:
2621 snd_pcm_stream_unlock_irq(substream);
2622 return ret;
2623}
2624
877211f5 2625static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2626{
877211f5 2627 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2628 int err;
2629
2630 snd_pcm_stream_lock_irq(substream);
2631 switch (runtime->status->state) {
2632 case SNDRV_PCM_STATE_DRAINING:
2633 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2634 goto __badfd;
1f96153b 2635 /* Fall through */
1da177e4
LT		 2636 case SNDRV_PCM_STATE_RUNNING:
2637 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2638 break;
2639 /* Fall through */
2640 case SNDRV_PCM_STATE_PREPARED:
1da177e4
LT		 2641 err = 0;
2642 break;
f3f6c614
JK		 2643 case SNDRV_PCM_STATE_SUSPENDED:
2644 err = -ESTRPIPE;
2645 break;
1da177e4
LT		 2646 case SNDRV_PCM_STATE_XRUN:
2647 err = -EPIPE;
2648 break;
2649 default:
2650 __badfd:
2651 err = -EBADFD;
2652 break;
2653 }
2654 snd_pcm_stream_unlock_irq(substream);
2655 return err;
2656}
2657
877211f5
TI		 2658static int snd_pcm_delay(struct snd_pcm_substream *substream,
2659 snd_pcm_sframes_t __user *res)
1da177e4 2660{
877211f5 2661 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2662 int err;
2663 snd_pcm_sframes_t n = 0;
2664
2665 snd_pcm_stream_lock_irq(substream);
2666 switch (runtime->status->state) {
2667 case SNDRV_PCM_STATE_DRAINING:
2668 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2669 goto __badfd;
1f96153b 2670 /* Fall through */
1da177e4
LT		 2671 case SNDRV_PCM_STATE_RUNNING:
2672 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2673 break;
2674 /* Fall through */
2675 case SNDRV_PCM_STATE_PREPARED:
2676 case SNDRV_PCM_STATE_SUSPENDED:
2677 err = 0;
2678 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2679 n = snd_pcm_playback_hw_avail(runtime);
2680 else
2681 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2682 n += runtime->delay;
1da177e4
LT		 2683 break;
2684 case SNDRV_PCM_STATE_XRUN:
2685 err = -EPIPE;
2686 break;
2687 default:
2688 __badfd:
2689 err = -EBADFD;
2690 break;
2691 }
2692 snd_pcm_stream_unlock_irq(substream);
2693 if (!err)
2694 if (put_user(n, res))
2695 err = -EFAULT;
2696 return err;
2697}
2698
877211f5
TI		 2699static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2700 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2701{
877211f5
TI		 2702 struct snd_pcm_runtime *runtime = substream->runtime;
2703 struct snd_pcm_sync_ptr sync_ptr;
2704 volatile struct snd_pcm_mmap_status *status;
2705 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2706 int err;
2707
2708 memset(&sync_ptr, 0, sizeof(sync_ptr));
2709 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2710 return -EFAULT;
877211f5 2711 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2712 return -EFAULT;
2713 status = runtime->status;
2714 control = runtime->control;
2715 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2716 err = snd_pcm_hwsync(substream);
2717 if (err < 0)
2718 return err;
2719 }
2720 snd_pcm_stream_lock_irq(substream);
2721 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2722 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2723 else
2724 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2725 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2726 control->avail_min = sync_ptr.c.control.avail_min;
2727 else
2728 sync_ptr.c.control.avail_min = control->avail_min;
2729 sync_ptr.s.status.state = status->state;
2730 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2731 sync_ptr.s.status.tstamp = status->tstamp;
2732 sync_ptr.s.status.suspended_state = status->suspended_state;
2733 snd_pcm_stream_unlock_irq(substream);
2734 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2735 return -EFAULT;
2736 return 0;
2737}
b751eef1
JK		 2738
2739static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2740{
2741 struct snd_pcm_runtime *runtime = substream->runtime;
2742 int arg;
2743
2744 if (get_user(arg, _arg))
2745 return -EFAULT;
2746 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2747 return -EINVAL;
2408c219 2748 runtime->tstamp_type = arg;
b751eef1
JK		 2749 return 0;
2750}
1da177e4 2751
0df63e44
TI		 2752static int snd_pcm_common_ioctl1(struct file *file,
2753 struct snd_pcm_substream *substream,
1da177e4
LT		 2754 unsigned int cmd, void __user *arg)
2755{
1da177e4
LT		 2756 switch (cmd) {
2757 case SNDRV_PCM_IOCTL_PVERSION:
2758 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2759 case SNDRV_PCM_IOCTL_INFO:
2760 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2761 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2762 return 0;
b751eef1
JK		 2763 case SNDRV_PCM_IOCTL_TTSTAMP:
2764 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2765 case SNDRV_PCM_IOCTL_HW_REFINE:
2766 return snd_pcm_hw_refine_user(substream, arg);
2767 case SNDRV_PCM_IOCTL_HW_PARAMS:
2768 return snd_pcm_hw_params_user(substream, arg);
2769 case SNDRV_PCM_IOCTL_HW_FREE:
2770 return snd_pcm_hw_free(substream);
2771 case SNDRV_PCM_IOCTL_SW_PARAMS:
2772 return snd_pcm_sw_params_user(substream, arg);
2773 case SNDRV_PCM_IOCTL_STATUS:
38ca2a4d
PLB		 2774 return snd_pcm_status_user(substream, arg, false);
2775 case SNDRV_PCM_IOCTL_STATUS_EXT:
2776 return snd_pcm_status_user(substream, arg, true);
1da177e4
LT		 2777 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2778 return snd_pcm_channel_info_user(substream, arg);
2779 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2780 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2781 case SNDRV_PCM_IOCTL_RESET:
2782 return snd_pcm_reset(substream);
2783 case SNDRV_PCM_IOCTL_START:
2784 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2785 case SNDRV_PCM_IOCTL_LINK:
2786 return snd_pcm_link(substream, (int)(unsigned long) arg);
2787 case SNDRV_PCM_IOCTL_UNLINK:
2788 return snd_pcm_unlink(substream);
2789 case SNDRV_PCM_IOCTL_RESUME:
2790 return snd_pcm_resume(substream);
2791 case SNDRV_PCM_IOCTL_XRUN:
2792 return snd_pcm_xrun(substream);
2793 case SNDRV_PCM_IOCTL_HWSYNC:
2794 return snd_pcm_hwsync(substream);
2795 case SNDRV_PCM_IOCTL_DELAY:
2796 return snd_pcm_delay(substream, arg);
2797 case SNDRV_PCM_IOCTL_SYNC_PTR:
2798 return snd_pcm_sync_ptr(substream, arg);
59d48582 2799#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2800 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2801 return snd_pcm_hw_refine_old_user(substream, arg);
2802 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2803 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2804#endif
1da177e4 2805 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2806 return snd_pcm_drain(substream, file);
1da177e4
LT		 2807 case SNDRV_PCM_IOCTL_DROP:
2808 return snd_pcm_drop(substream);
e661d0dd
TI		 2809 case SNDRV_PCM_IOCTL_PAUSE:
2810 {
2811 int res;
2812 snd_pcm_stream_lock_irq(substream);
2813 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2814 snd_pcm_stream_unlock_irq(substream);
2815 return res;
2816 }
1da177e4 2817 }
09e56df8 2818 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
1da177e4
LT		 2819 return -ENOTTY;
2820}
2821
0df63e44
TI		 2822static int snd_pcm_playback_ioctl1(struct file *file,
2823 struct snd_pcm_substream *substream,
1da177e4
LT		 2824 unsigned int cmd, void __user *arg)
2825{
7eaa943c
TI		 2826 if (snd_BUG_ON(!substream))
2827 return -ENXIO;
2828 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2829 return -EINVAL;
1da177e4
LT		 2830 switch (cmd) {
2831 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2832 {
877211f5
TI		 2833 struct snd_xferi xferi;
2834 struct snd_xferi __user *_xferi = arg;
2835 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2836 snd_pcm_sframes_t result;
2837 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2838 return -EBADFD;
2839 if (put_user(0, &_xferi->result))
2840 return -EFAULT;
2841 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2842 return -EFAULT;
2843 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2844 __put_user(result, &_xferi->result);
2845 return result < 0 ? result : 0;
2846 }
2847 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2848 {
877211f5
TI		 2849 struct snd_xfern xfern;
2850 struct snd_xfern __user *_xfern = arg;
2851 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2852 void __user **bufs;
2853 snd_pcm_sframes_t result;
2854 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2855 return -EBADFD;
2856 if (runtime->channels > 128)
2857 return -EINVAL;
2858 if (put_user(0, &_xfern->result))
2859 return -EFAULT;
2860 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2861 return -EFAULT;
ef44a1ec
LZ		 2862
2863 bufs = memdup_user(xfern.bufs,
2864 sizeof(void *) * runtime->channels);
2865 if (IS_ERR(bufs))
2866 return PTR_ERR(bufs);
1da177e4
LT		 2867 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2868 kfree(bufs);
2869 __put_user(result, &_xfern->result);
2870 return result < 0 ? result : 0;
2871 }
2872 case SNDRV_PCM_IOCTL_REWIND:
2873 {
2874 snd_pcm_uframes_t frames;
2875 snd_pcm_uframes_t __user *_frames = arg;
2876 snd_pcm_sframes_t result;
2877 if (get_user(frames, _frames))
2878 return -EFAULT;
2879 if (put_user(0, _frames))
2880 return -EFAULT;
2881 result = snd_pcm_playback_rewind(substream, frames);
2882 __put_user(result, _frames);
2883 return result < 0 ? result : 0;
2884 }
2885 case SNDRV_PCM_IOCTL_FORWARD:
2886 {
2887 snd_pcm_uframes_t frames;
2888 snd_pcm_uframes_t __user *_frames = arg;
2889 snd_pcm_sframes_t result;
2890 if (get_user(frames, _frames))
2891 return -EFAULT;
2892 if (put_user(0, _frames))
2893 return -EFAULT;
2894 result = snd_pcm_playback_forward(substream, frames);
2895 __put_user(result, _frames);
2896 return result < 0 ? result : 0;
2897 }
1da177e4 2898 }
0df63e44 2899 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2900}
2901
0df63e44
TI		 2902static int snd_pcm_capture_ioctl1(struct file *file,
2903 struct snd_pcm_substream *substream,
1da177e4
LT		 2904 unsigned int cmd, void __user *arg)
2905{
7eaa943c
TI		 2906 if (snd_BUG_ON(!substream))
2907 return -ENXIO;
2908 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2909 return -EINVAL;
1da177e4
LT		 2910 switch (cmd) {
2911 case SNDRV_PCM_IOCTL_READI_FRAMES:
2912 {
877211f5
TI		 2913 struct snd_xferi xferi;
2914 struct snd_xferi __user *_xferi = arg;
2915 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2916 snd_pcm_sframes_t result;
2917 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2918 return -EBADFD;
2919 if (put_user(0, &_xferi->result))
2920 return -EFAULT;
2921 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2922 return -EFAULT;
2923 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2924 __put_user(result, &_xferi->result);
2925 return result < 0 ? result : 0;
2926 }
2927 case SNDRV_PCM_IOCTL_READN_FRAMES:
2928 {
877211f5
TI		 2929 struct snd_xfern xfern;
2930 struct snd_xfern __user *_xfern = arg;
2931 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2932 void *bufs;
2933 snd_pcm_sframes_t result;
2934 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2935 return -EBADFD;
2936 if (runtime->channels > 128)
2937 return -EINVAL;
2938 if (put_user(0, &_xfern->result))
2939 return -EFAULT;
2940 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2941 return -EFAULT;
ef44a1ec
LZ		 2942
2943 bufs = memdup_user(xfern.bufs,
2944 sizeof(void *) * runtime->channels);
2945 if (IS_ERR(bufs))
2946 return PTR_ERR(bufs);
1da177e4
LT		 2947 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2948 kfree(bufs);
2949 __put_user(result, &_xfern->result);
2950 return result < 0 ? result : 0;
2951 }
2952 case SNDRV_PCM_IOCTL_REWIND:
2953 {
2954 snd_pcm_uframes_t frames;
2955 snd_pcm_uframes_t __user *_frames = arg;
2956 snd_pcm_sframes_t result;
2957 if (get_user(frames, _frames))
2958 return -EFAULT;
2959 if (put_user(0, _frames))
2960 return -EFAULT;
2961 result = snd_pcm_capture_rewind(substream, frames);
2962 __put_user(result, _frames);
2963 return result < 0 ? result : 0;
2964 }
2965 case SNDRV_PCM_IOCTL_FORWARD:
2966 {
2967 snd_pcm_uframes_t frames;
2968 snd_pcm_uframes_t __user *_frames = arg;
2969 snd_pcm_sframes_t result;
2970 if (get_user(frames, _frames))
2971 return -EFAULT;
2972 if (put_user(0, _frames))
2973 return -EFAULT;
2974 result = snd_pcm_capture_forward(substream, frames);
2975 __put_user(result, _frames);
2976 return result < 0 ? result : 0;
2977 }
2978 }
0df63e44 2979 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2980}
2981
877211f5
TI		 2982static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2983 unsigned long arg)
1da177e4 2984{
877211f5 2985 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2986
2987 pcm_file = file->private_data;
2988
2989 if (((cmd >> 8) & 0xff) != 'A')
2990 return -ENOTTY;
2991
0df63e44
TI		 2992 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2993 (void __user *)arg);
1da177e4
LT		 2994}
2995
877211f5
TI		 2996static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2997 unsigned long arg)
1da177e4 2998{
877211f5 2999 struct snd_pcm_file *pcm_file;
1da177e4
LT		 3000
3001 pcm_file = file->private_data;
3002
3003 if (((cmd >> 8) & 0xff) != 'A')
3004 return -ENOTTY;
3005
0df63e44
TI		 3006 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
3007 (void __user *)arg);
1da177e4
LT		 3008}
3009
bf1bbb5a
TI		 3010int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
3011 unsigned int cmd, void *arg)
1da177e4
LT		 3012{
3013 mm_segment_t fs;
3014 int result;
3015
3016 fs = snd_enter_user();
1da177e4
LT		 3017 switch (substream->stream) {
3018 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 3019 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
3020 (void __user *)arg);
bf1bbb5a 3021 break;
1da177e4 3022 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 3023 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
3024 (void __user *)arg);
bf1bbb5a 3025 break;
1da177e4 3026 default:
bf1bbb5a
TI		 3027 result = -EINVAL;
3028 break;
1da177e4 3029 }
bf1bbb5a
TI		 3030 snd_leave_user(fs);
3031 return result;
1da177e4
LT		 3032}
3033
e88e8ae6
TI		 3034EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
3035
877211f5
TI		 3036static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
3037 loff_t * offset)
1da177e4 3038{
877211f5
TI		 3039 struct snd_pcm_file *pcm_file;
3040 struct snd_pcm_substream *substream;
3041 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3042 snd_pcm_sframes_t result;
3043
3044 pcm_file = file->private_data;
3045 substream = pcm_file->substream;
7eaa943c
TI		 3046 if (PCM_RUNTIME_CHECK(substream))
3047 return -ENXIO;
1da177e4
LT		 3048 runtime = substream->runtime;
3049 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3050 return -EBADFD;
3051 if (!frame_aligned(runtime, count))
3052 return -EINVAL;
3053 count = bytes_to_frames(runtime, count);
3054 result = snd_pcm_lib_read(substream, buf, count);
3055 if (result > 0)
3056 result = frames_to_bytes(runtime, result);
3057 return result;
3058}
3059
877211f5
TI		 3060static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3061 size_t count, loff_t * offset)
1da177e4 3062{
877211f5
TI		 3063 struct snd_pcm_file *pcm_file;
3064 struct snd_pcm_substream *substream;
3065 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3066 snd_pcm_sframes_t result;
3067
3068 pcm_file = file->private_data;
3069 substream = pcm_file->substream;
7eaa943c
TI		 3070 if (PCM_RUNTIME_CHECK(substream))
3071 return -ENXIO;
1da177e4 3072 runtime = substream->runtime;
7eaa943c
TI		 3073 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3074 return -EBADFD;
3075 if (!frame_aligned(runtime, count))
3076 return -EINVAL;
1da177e4
LT		 3077 count = bytes_to_frames(runtime, count);
3078 result = snd_pcm_lib_write(substream, buf, count);
3079 if (result > 0)
3080 result = frames_to_bytes(runtime, result);
1da177e4
LT		 3081 return result;
3082}
3083
1c65d986 3084static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to)
1da177e4 3085{
877211f5
TI		 3086 struct snd_pcm_file *pcm_file;
3087 struct snd_pcm_substream *substream;
3088 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3089 snd_pcm_sframes_t result;
3090 unsigned long i;
3091 void __user **bufs;
3092 snd_pcm_uframes_t frames;
3093
ee0b3e67 3094 pcm_file = iocb->ki_filp->private_data;
1da177e4 3095 substream = pcm_file->substream;
7eaa943c
TI		 3096 if (PCM_RUNTIME_CHECK(substream))
3097 return -ENXIO;
1da177e4
LT		 3098 runtime = substream->runtime;
3099 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3100 return -EBADFD;
1c65d986
AV		 3101 if (!iter_is_iovec(to))
3102 return -EINVAL;
3103 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels)
1da177e4 3104 return -EINVAL;
1c65d986 3105 if (!frame_aligned(runtime, to->iov->iov_len))
1da177e4 3106 return -EINVAL;
1c65d986
AV		 3107 frames = bytes_to_samples(runtime, to->iov->iov_len);
3108 bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL);
1da177e4
LT		 3109 if (bufs == NULL)
3110 return -ENOMEM;
1c65d986
AV		 3111 for (i = 0; i < to->nr_segs; ++i)
3112 bufs[i] = to->iov[i].iov_base;
1da177e4
LT		 3113 result = snd_pcm_lib_readv(substream, bufs, frames);
3114 if (result > 0)
3115 result = frames_to_bytes(runtime, result);
3116 kfree(bufs);
3117 return result;
3118}
3119
1c65d986 3120static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from)
1da177e4 3121{
877211f5
TI		 3122 struct snd_pcm_file *pcm_file;
3123 struct snd_pcm_substream *substream;
3124 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3125 snd_pcm_sframes_t result;
3126 unsigned long i;
3127 void __user **bufs;
3128 snd_pcm_uframes_t frames;
3129
ee0b3e67 3130 pcm_file = iocb->ki_filp->private_data;
1da177e4 3131 substream = pcm_file->substream;
7eaa943c
TI		 3132 if (PCM_RUNTIME_CHECK(substream))
3133 return -ENXIO;
1da177e4 3134 runtime = substream->runtime;
7eaa943c
TI		 3135 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3136 return -EBADFD;
1c65d986
AV		 3137 if (!iter_is_iovec(from))
3138 return -EINVAL;
3139 if (from->nr_segs > 128 || from->nr_segs != runtime->channels ||
3140 !frame_aligned(runtime, from->iov->iov_len))
7eaa943c 3141 return -EINVAL;
1c65d986
AV		 3142 frames = bytes_to_samples(runtime, from->iov->iov_len);
3143 bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL);
1da177e4
LT		 3144 if (bufs == NULL)
3145 return -ENOMEM;
1c65d986
AV		 3146 for (i = 0; i < from->nr_segs; ++i)
3147 bufs[i] = from->iov[i].iov_base;
1da177e4
LT		 3148 result = snd_pcm_lib_writev(substream, bufs, frames);
3149 if (result > 0)
3150 result = frames_to_bytes(runtime, result);
3151 kfree(bufs);
1da177e4
LT		 3152 return result;
3153}
3154
3155static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3156{
877211f5
TI		 3157 struct snd_pcm_file *pcm_file;
3158 struct snd_pcm_substream *substream;
3159 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3160 unsigned int mask;
3161 snd_pcm_uframes_t avail;
3162
3163 pcm_file = file->private_data;
3164
3165 substream = pcm_file->substream;
7eaa943c 3166 if (PCM_RUNTIME_CHECK(substream))
e099aeea 3167 return POLLOUT | POLLWRNORM | POLLERR;
1da177e4
LT		 3168 runtime = substream->runtime;
3169
3170 poll_wait(file, &runtime->sleep, wait);
3171
3172 snd_pcm_stream_lock_irq(substream);
3173 avail = snd_pcm_playback_avail(runtime);
3174 switch (runtime->status->state) {
3175 case SNDRV_PCM_STATE_RUNNING:
3176 case SNDRV_PCM_STATE_PREPARED:
3177 case SNDRV_PCM_STATE_PAUSED:
3178 if (avail >= runtime->control->avail_min) {
3179 mask = POLLOUT | POLLWRNORM;
3180 break;
3181 }
3182 /* Fall through */
3183 case SNDRV_PCM_STATE_DRAINING:
3184 mask = 0;
3185 break;
3186 default:
3187 mask = POLLOUT | POLLWRNORM | POLLERR;
3188 break;
3189 }
3190 snd_pcm_stream_unlock_irq(substream);
3191 return mask;
3192}
3193
3194static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3195{
877211f5
TI		 3196 struct snd_pcm_file *pcm_file;
3197 struct snd_pcm_substream *substream;
3198 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3199 unsigned int mask;
3200 snd_pcm_uframes_t avail;
3201
3202 pcm_file = file->private_data;
3203
3204 substream = pcm_file->substream;
7eaa943c 3205 if (PCM_RUNTIME_CHECK(substream))
e099aeea 3206 return POLLIN | POLLRDNORM | POLLERR;
1da177e4
LT		 3207 runtime = substream->runtime;
3208
3209 poll_wait(file, &runtime->sleep, wait);
3210
3211 snd_pcm_stream_lock_irq(substream);
3212 avail = snd_pcm_capture_avail(runtime);
3213 switch (runtime->status->state) {
3214 case SNDRV_PCM_STATE_RUNNING:
3215 case SNDRV_PCM_STATE_PREPARED:
3216 case SNDRV_PCM_STATE_PAUSED:
3217 if (avail >= runtime->control->avail_min) {
3218 mask = POLLIN | POLLRDNORM;
3219 break;
3220 }
3221 mask = 0;
3222 break;
3223 case SNDRV_PCM_STATE_DRAINING:
3224 if (avail > 0) {
3225 mask = POLLIN | POLLRDNORM;
3226 break;
3227 }
3228 /* Fall through */
3229 default:
3230 mask = POLLIN | POLLRDNORM | POLLERR;
3231 break;
3232 }
3233 snd_pcm_stream_unlock_irq(substream);
3234 return mask;
3235}
3236
3237/*
3238 * mmap support
3239 */
3240
3241/*
3242 * Only on coherent architectures, we can mmap the status and the control records
3243 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3244 */
3245#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3246/*
3247 * mmap status record
3248 */
11bac800 3249static int snd_pcm_mmap_status_fault(struct vm_fault *vmf)
1da177e4 3250{
11bac800 3251 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3252 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3253
3254 if (substream == NULL)
3ad5afcd 3255 return VM_FAULT_SIGBUS;
1da177e4 3256 runtime = substream->runtime;
3ad5afcd
NP		 3257 vmf->page = virt_to_page(runtime->status);
3258 get_page(vmf->page);
3259 return 0;
1da177e4
LT		 3260}
3261
f0f37e2f 3262static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3263{
3ad5afcd 3264 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3265};
3266
877211f5 3267static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3268 struct vm_area_struct *area)
3269{
1da177e4
LT		 3270 long size;
3271 if (!(area->vm_flags & VM_READ))
3272 return -EINVAL;
1da177e4 3273 size = area->vm_end - area->vm_start;
877211f5 3274 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3275 return -EINVAL;
3276 area->vm_ops = &snd_pcm_vm_ops_status;
3277 area->vm_private_data = substream;
314e51b9 3278 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3279 return 0;
3280}
3281
3282/*
3283 * mmap control record
3284 */
11bac800 3285static int snd_pcm_mmap_control_fault(struct vm_fault *vmf)
1da177e4 3286{
11bac800 3287 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3288 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3289
3290 if (substream == NULL)
3ad5afcd 3291 return VM_FAULT_SIGBUS;
1da177e4 3292 runtime = substream->runtime;
3ad5afcd
NP		 3293 vmf->page = virt_to_page(runtime->control);
3294 get_page(vmf->page);
3295 return 0;
1da177e4
LT		 3296}
3297
f0f37e2f 3298static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3299{
3ad5afcd 3300 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3301};
3302
877211f5 3303static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3304 struct vm_area_struct *area)
3305{
1da177e4
LT		 3306 long size;
3307 if (!(area->vm_flags & VM_READ))
3308 return -EINVAL;
1da177e4 3309 size = area->vm_end - area->vm_start;
877211f5 3310 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3311 return -EINVAL;
3312 area->vm_ops = &snd_pcm_vm_ops_control;
3313 area->vm_private_data = substream;
314e51b9 3314 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3315 return 0;
3316}
3317#else /* ! coherent mmap */
3318/*
3319 * don't support mmap for status and control records.
3320 */
877211f5 3321static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3322 struct vm_area_struct *area)
3323{
3324 return -ENXIO;
3325}
877211f5 3326static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3327 struct vm_area_struct *area)
3328{
3329 return -ENXIO;
3330}
3331#endif /* coherent mmap */
3332
9eb4a067
TI		 3333static inline struct page *
3334snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3335{
3336 void *vaddr = substream->runtime->dma_area + ofs;
3337 return virt_to_page(vaddr);
3338}
3339
1da177e4 3340/*
3ad5afcd 3341 * fault callback for mmapping a RAM page
1da177e4 3342 */
11bac800 3343static int snd_pcm_mmap_data_fault(struct vm_fault *vmf)
1da177e4 3344{
11bac800 3345 struct snd_pcm_substream *substream = vmf->vma->vm_private_data;
877211f5 3346 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3347 unsigned long offset;
3348 struct page * page;
1da177e4
LT		 3349 size_t dma_bytes;
3350
3351 if (substream == NULL)
3ad5afcd 3352 return VM_FAULT_SIGBUS;
1da177e4 3353 runtime = substream->runtime;
3ad5afcd 3354 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3355 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3356 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3357 return VM_FAULT_SIGBUS;
9eb4a067 3358 if (substream->ops->page)
1da177e4 3359 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3360 else
3361 page = snd_pcm_default_page_ops(substream, offset);
3362 if (!page)
3363 return VM_FAULT_SIGBUS;
b5810039 3364 get_page(page);
3ad5afcd
NP		 3365 vmf->page = page;
3366 return 0;
1da177e4
LT		 3367}
3368
657b1989
TI		 3369static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3370 .open = snd_pcm_mmap_data_open,
3371 .close = snd_pcm_mmap_data_close,
3372};
3373
3374static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3375 .open = snd_pcm_mmap_data_open,
3376 .close = snd_pcm_mmap_data_close,
3ad5afcd 3377 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3378};
3379
3380/*
3381 * mmap the DMA buffer on RAM
3382 */
30b771cf
TI		 3383
3384/**
3385 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3386 * @substream: PCM substream
3387 * @area: VMA
3388 *
3389 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3390 * this function is invoked implicitly.
3391 */
18a2b962
TI		 3392int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3393 struct vm_area_struct *area)
1da177e4 3394{
314e51b9 3395 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
a5606f85 3396#ifdef CONFIG_GENERIC_ALLOCATOR
05503214
NC		 3397 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3398 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3399 return remap_pfn_range(area, area->vm_start,
3400 substream->dma_buffer.addr >> PAGE_SHIFT,
3401 area->vm_end - area->vm_start, area->vm_page_prot);
3402 }
a5606f85 3403#endif /* CONFIG_GENERIC_ALLOCATOR */
49d776ff 3404#ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
657b1989
TI		 3405 if (!substream->ops->page &&
3406 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3407 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3408 area,
3409 substream->runtime->dma_area,
3410 substream->runtime->dma_addr,
3411 area->vm_end - area->vm_start);
49d776ff 3412#endif /* CONFIG_X86 */
657b1989
TI		 3413 /* mmap with fault handler */
3414 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3415 return 0;
3416}
18a2b962 3417EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3418
3419/*
3420 * mmap the DMA buffer on I/O memory area
3421 */
3422#if SNDRV_PCM_INFO_MMAP_IOMEM
30b771cf
TI		 3423/**
3424 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3425 * @substream: PCM substream
3426 * @area: VMA
3427 *
3428 * When your hardware uses the iomapped pages as the hardware buffer and
3429 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3430 * is supposed to work only on limited architectures.
3431 */
877211f5
TI		 3432int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3433 struct vm_area_struct *area)
1da177e4 3434{
0fe09a45 3435 struct snd_pcm_runtime *runtime = substream->runtime;;
1da177e4 3436
1da177e4 3437 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
0fe09a45 3438 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
1da177e4 3439}
e88e8ae6
TI		 3440
3441EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3442#endif /* SNDRV_PCM_INFO_MMAP */
3443
3444/*
3445 * mmap DMA buffer
3446 */
877211f5 3447int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3448 struct vm_area_struct *area)
3449{
877211f5 3450 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3451 long size;
3452 unsigned long offset;
3453 size_t dma_bytes;
657b1989 3454 int err;
1da177e4
LT		 3455
3456 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3457 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3458 return -EINVAL;
3459 } else {
3460 if (!(area->vm_flags & VM_READ))
3461 return -EINVAL;
3462 }
3463 runtime = substream->runtime;
1da177e4
LT		 3464 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3465 return -EBADFD;
3466 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3467 return -ENXIO;
3468 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3469 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3470 return -EINVAL;
3471 size = area->vm_end - area->vm_start;
3472 offset = area->vm_pgoff << PAGE_SHIFT;
3473 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3474 if ((size_t)size > dma_bytes)
3475 return -EINVAL;
3476 if (offset > dma_bytes - size)
3477 return -EINVAL;
3478
657b1989
TI		 3479 area->vm_ops = &snd_pcm_vm_ops_data;
3480 area->vm_private_data = substream;
1da177e4 3481 if (substream->ops->mmap)
657b1989 3482 err = substream->ops->mmap(substream, area);
1da177e4 3483 else
18a2b962 3484 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3485 if (!err)
3486 atomic_inc(&substream->mmap_count);
3487 return err;
1da177e4
LT		 3488}
3489
e88e8ae6
TI		 3490EXPORT_SYMBOL(snd_pcm_mmap_data);
3491
1da177e4
LT		 3492static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3493{
877211f5
TI		 3494 struct snd_pcm_file * pcm_file;
3495 struct snd_pcm_substream *substream;
1da177e4
LT		 3496 unsigned long offset;
3497
3498 pcm_file = file->private_data;
3499 substream = pcm_file->substream;
7eaa943c
TI		 3500 if (PCM_RUNTIME_CHECK(substream))
3501 return -ENXIO;
1da177e4
LT		 3502
3503 offset = area->vm_pgoff << PAGE_SHIFT;
3504 switch (offset) {
3505 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3506 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3507 return -ENXIO;
3508 return snd_pcm_mmap_status(substream, file, area);
3509 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3510 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3511 return -ENXIO;
3512 return snd_pcm_mmap_control(substream, file, area);
3513 default:
3514 return snd_pcm_mmap_data(substream, file, area);
3515 }
3516 return 0;
3517}
3518
3519static int snd_pcm_fasync(int fd, struct file * file, int on)
3520{
877211f5
TI		 3521 struct snd_pcm_file * pcm_file;
3522 struct snd_pcm_substream *substream;
3523 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3524
3525 pcm_file = file->private_data;
3526 substream = pcm_file->substream;
7eaa943c 3527 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3528 return -ENXIO;
1da177e4 3529 runtime = substream->runtime;
d05468b7 3530 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3531}
3532
3533/*
3534 * ioctl32 compat
3535 */
3536#ifdef CONFIG_COMPAT
3537#include "pcm_compat.c"
3538#else
3539#define snd_pcm_ioctl_compat NULL
3540#endif
3541
3542/*
3543 * To be removed helpers to keep binary compatibility
3544 */
3545
59d48582 3546#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3547#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3548#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3549
877211f5
TI		 3550static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3551 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3552{
3553 unsigned int i;
3554
3555 memset(params, 0, sizeof(*params));
3556 params->flags = oparams->flags;
3557 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3558 params->masks[i].bits[0] = oparams->masks[i];
3559 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3560 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3561 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3562 params->info = oparams->info;
3563 params->msbits = oparams->msbits;
3564 params->rate_num = oparams->rate_num;
3565 params->rate_den = oparams->rate_den;
3566 params->fifo_size = oparams->fifo_size;
3567}
3568
877211f5
TI		 3569static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3570 struct snd_pcm_hw_params *params)
1da177e4
LT		 3571{
3572 unsigned int i;
3573
3574 memset(oparams, 0, sizeof(*oparams));
3575 oparams->flags = params->flags;
3576 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3577 oparams->masks[i] = params->masks[i].bits[0];
3578 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3579 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3580 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3581 oparams->info = params->info;
3582 oparams->msbits = params->msbits;
3583 oparams->rate_num = params->rate_num;
3584 oparams->rate_den = params->rate_den;
3585 oparams->fifo_size = params->fifo_size;
3586}
3587
877211f5
TI		 3588static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3589 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3590{
877211f5
TI		 3591 struct snd_pcm_hw_params *params;
3592 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3593 int err;
3594
3595 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3596 if (!params)
3597 return -ENOMEM;
1da177e4 3598
ef44a1ec
LZ		 3599 oparams = memdup_user(_oparams, sizeof(*oparams));
3600 if (IS_ERR(oparams)) {
3601 err = PTR_ERR(oparams);
1da177e4
LT		 3602 goto out;
3603 }
3604 snd_pcm_hw_convert_from_old_params(params, oparams);
3605 err = snd_pcm_hw_refine(substream, params);
3606 snd_pcm_hw_convert_to_old_params(oparams, params);
3607 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3608 if (!err)
3609 err = -EFAULT;
3610 }
ef44a1ec
LZ		 3611
3612 kfree(oparams);
1da177e4
LT		 3613out:
3614 kfree(params);
1da177e4
LT		 3615 return err;
3616}
3617
877211f5
TI		 3618static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3619 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3620{
877211f5
TI		 3621 struct snd_pcm_hw_params *params;
3622 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3623 int err;
3624
3625 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3626 if (!params)
3627 return -ENOMEM;
3628
3629 oparams = memdup_user(_oparams, sizeof(*oparams));
3630 if (IS_ERR(oparams)) {
3631 err = PTR_ERR(oparams);
1da177e4
LT		 3632 goto out;
3633 }
3634 snd_pcm_hw_convert_from_old_params(params, oparams);
3635 err = snd_pcm_hw_params(substream, params);
3636 snd_pcm_hw_convert_to_old_params(oparams, params);
3637 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3638 if (!err)
3639 err = -EFAULT;
3640 }
ef44a1ec
LZ		 3641
3642 kfree(oparams);
1da177e4
LT		 3643out:
3644 kfree(params);
1da177e4
LT		 3645 return err;
3646}
59d48582 3647#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3648
7003609b 3649#ifndef CONFIG_MMU
55c63bd2
DG		 3650static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3651 unsigned long addr,
3652 unsigned long len,
3653 unsigned long pgoff,
3654 unsigned long flags)
3655{
3656 struct snd_pcm_file *pcm_file = file->private_data;
3657 struct snd_pcm_substream *substream = pcm_file->substream;
3658 struct snd_pcm_runtime *runtime = substream->runtime;
3659 unsigned long offset = pgoff << PAGE_SHIFT;
3660
3661 switch (offset) {
3662 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3663 return (unsigned long)runtime->status;
3664 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3665 return (unsigned long)runtime->control;
3666 default:
3667 return (unsigned long)runtime->dma_area + offset;
3668 }
7003609b
CC		 3669}
3670#else
55c63bd2 3671# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3672#endif
3673
1da177e4
LT		 3674/*
3675 * Register section
3676 */
3677
9c2e08c5 3678const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3679 {
2af677fc
CL		 3680 .owner = THIS_MODULE,
3681 .write = snd_pcm_write,
1c65d986 3682 .write_iter = snd_pcm_writev,
f87135f5 3683 .open = snd_pcm_playback_open,
2af677fc 3684 .release = snd_pcm_release,
02f4865f 3685 .llseek = no_llseek,
2af677fc
CL		 3686 .poll = snd_pcm_playback_poll,
3687 .unlocked_ioctl = snd_pcm_playback_ioctl,
3688 .compat_ioctl = snd_pcm_ioctl_compat,
3689 .mmap = snd_pcm_mmap,
3690 .fasync = snd_pcm_fasync,
55c63bd2 3691 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3692 },
3693 {
2af677fc
CL		 3694 .owner = THIS_MODULE,
3695 .read = snd_pcm_read,
1c65d986 3696 .read_iter = snd_pcm_readv,
f87135f5 3697 .open = snd_pcm_capture_open,
2af677fc 3698 .release = snd_pcm_release,
02f4865f 3699 .llseek = no_llseek,
2af677fc
CL		 3700 .poll = snd_pcm_capture_poll,
3701 .unlocked_ioctl = snd_pcm_capture_ioctl,
3702 .compat_ioctl = snd_pcm_ioctl_compat,
3703 .mmap = snd_pcm_mmap,
3704 .fasync = snd_pcm_fasync,
55c63bd2 3705 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3706 }
3707};
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