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ALSA: pcm: Simplify snd_pcm_action_lock_irq()
[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>
26#include <linux/time.h>
e8db0be1 27#include <linux/pm_qos.h>
a27bb332 28#include <linux/aio.h>
657b1989 29#include <linux/dma-mapping.h>
1da177e4
LT		 30#include <sound/core.h>
31#include <sound/control.h>
32#include <sound/info.h>
33#include <sound/pcm.h>
34#include <sound/pcm_params.h>
35#include <sound/timer.h>
36#include <sound/minors.h>
37#include <asm/io.h>
38
39/*
40 * Compatibility
41 */
42
877211f5 43struct snd_pcm_hw_params_old {
1da177e4
LT		 44 unsigned int flags;
45 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
46 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 47 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 48 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
49 unsigned int rmask;
50 unsigned int cmask;
51 unsigned int info;
52 unsigned int msbits;
53 unsigned int rate_num;
54 unsigned int rate_den;
877211f5 55 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 56 unsigned char reserved[64];
57};
58
59d48582 59#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 60#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
61#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 62
877211f5
TI		 63static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
64 struct snd_pcm_hw_params_old __user * _oparams);
65static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
66 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 67#endif
f87135f5 68static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 69
70/*
71 *
72 */
73
7af142f7
TI		 74static DEFINE_RWLOCK(snd_pcm_link_rwlock);
75static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4 76
30b771cf
TI		 77/**
78 * snd_pcm_stream_lock - Lock the PCM stream
79 * @substream: PCM substream
80 *
81 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
82 * flag of the given substream. This also takes the global link rw lock
83 * (or rw sem), too, for avoiding the race with linked streams.
84 */
7af142f7
TI		 85void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
86{
87 if (substream->pcm->nonatomic) {
88 down_read(&snd_pcm_link_rwsem);
89 mutex_lock(&substream->self_group.mutex);
90 } else {
91 read_lock(&snd_pcm_link_rwlock);
92 spin_lock(&substream->self_group.lock);
93 }
94}
95EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
96
30b771cf
TI		 97/**
98 * snd_pcm_stream_lock - Unlock the PCM stream
99 * @substream: PCM substream
100 *
101 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
102 */
7af142f7
TI		 103void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
104{
105 if (substream->pcm->nonatomic) {
106 mutex_unlock(&substream->self_group.mutex);
107 up_read(&snd_pcm_link_rwsem);
108 } else {
109 spin_unlock(&substream->self_group.lock);
110 read_unlock(&snd_pcm_link_rwlock);
111 }
112}
113EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
114
30b771cf
TI		 115/**
116 * snd_pcm_stream_lock_irq - Lock the PCM stream
117 * @substream: PCM substream
118 *
119 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
120 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
121 * as snd_pcm_stream_lock().
122 */
7af142f7
TI		 123void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
124{
125 if (!substream->pcm->nonatomic)
126 local_irq_disable();
127 snd_pcm_stream_lock(substream);
128}
129EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
130
30b771cf
TI		 131/**
132 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
133 * @substream: PCM substream
134 *
135 * This is a counter-part of snd_pcm_stream_lock_irq().
136 */
7af142f7
TI		 137void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
138{
139 snd_pcm_stream_unlock(substream);
140 if (!substream->pcm->nonatomic)
141 local_irq_enable();
142}
143EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
144
145unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
146{
147 unsigned long flags = 0;
148 if (!substream->pcm->nonatomic)
149 local_irq_save(flags);
150 snd_pcm_stream_lock(substream);
151 return flags;
152}
153EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
154
30b771cf
TI		 155/**
156 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
157 * @substream: PCM substream
158 * @flags: irq flags
159 *
160 * This is a counter-part of snd_pcm_stream_lock_irqsave().
161 */
7af142f7
TI		 162void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
163 unsigned long flags)
164{
165 snd_pcm_stream_unlock(substream);
166 if (!substream->pcm->nonatomic)
167 local_irq_restore(flags);
168}
169EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
1da177e4
LT		 170
171static inline mm_segment_t snd_enter_user(void)
172{
173 mm_segment_t fs = get_fs();
174 set_fs(get_ds());
175 return fs;
176}
177
178static inline void snd_leave_user(mm_segment_t fs)
179{
180 set_fs(fs);
181}
182
183
184
877211f5 185int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 186{
877211f5
TI		 187 struct snd_pcm_runtime *runtime;
188 struct snd_pcm *pcm = substream->pcm;
189 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 190
1da177e4
LT		 191 memset(info, 0, sizeof(*info));
192 info->card = pcm->card->number;
193 info->device = pcm->device;
194 info->stream = substream->stream;
195 info->subdevice = substream->number;
196 strlcpy(info->id, pcm->id, sizeof(info->id));
197 strlcpy(info->name, pcm->name, sizeof(info->name));
198 info->dev_class = pcm->dev_class;
199 info->dev_subclass = pcm->dev_subclass;
200 info->subdevices_count = pstr->substream_count;
201 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
202 strlcpy(info->subname, substream->name, sizeof(info->subname));
203 runtime = substream->runtime;
204 /* AB: FIXME!!! This is definitely nonsense */
205 if (runtime) {
206 info->sync = runtime->sync;
207 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
208 }
209 return 0;
210}
211
877211f5
TI		 212int snd_pcm_info_user(struct snd_pcm_substream *substream,
213 struct snd_pcm_info __user * _info)
1da177e4 214{
877211f5 215 struct snd_pcm_info *info;
1da177e4
LT		 216 int err;
217
218 info = kmalloc(sizeof(*info), GFP_KERNEL);
219 if (! info)
220 return -ENOMEM;
221 err = snd_pcm_info(substream, info);
222 if (err >= 0) {
223 if (copy_to_user(_info, info, sizeof(*info)))
224 err = -EFAULT;
225 }
226 kfree(info);
227 return err;
228}
229
63825f3a
TI		 230static bool hw_support_mmap(struct snd_pcm_substream *substream)
231{
232 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
233 return false;
234 /* check architectures that return -EINVAL from dma_mmap_coherent() */
235 /* FIXME: this should be some global flag */
236#if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
237 defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
238 if (!substream->ops->mmap &&
239 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
240 return false;
241#endif
242 return true;
243}
244
1da177e4
LT		 245#undef RULES_DEBUG
246
247#ifdef RULES_DEBUG
248#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
47023ec7 249static const char * const snd_pcm_hw_param_names[] = {
1da177e4
LT		 250 HW_PARAM(ACCESS),
251 HW_PARAM(FORMAT),
252 HW_PARAM(SUBFORMAT),
253 HW_PARAM(SAMPLE_BITS),
254 HW_PARAM(FRAME_BITS),
255 HW_PARAM(CHANNELS),
256 HW_PARAM(RATE),
257 HW_PARAM(PERIOD_TIME),
258 HW_PARAM(PERIOD_SIZE),
259 HW_PARAM(PERIOD_BYTES),
260 HW_PARAM(PERIODS),
261 HW_PARAM(BUFFER_TIME),
262 HW_PARAM(BUFFER_SIZE),
263 HW_PARAM(BUFFER_BYTES),
264 HW_PARAM(TICK_TIME),
265};
266#endif
267
877211f5
TI		 268int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
269 struct snd_pcm_hw_params *params)
1da177e4
LT		 270{
271 unsigned int k;
877211f5
TI		 272 struct snd_pcm_hardware *hw;
273 struct snd_interval *i = NULL;
274 struct snd_mask *m = NULL;
275 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 276 unsigned int rstamps[constrs->rules_num];
277 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
278 unsigned int stamp = 2;
279 int changed, again;
280
281 params->info = 0;
282 params->fifo_size = 0;
283 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
284 params->msbits = 0;
285 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
286 params->rate_num = 0;
287 params->rate_den = 0;
288 }
289
290 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
291 m = hw_param_mask(params, k);
292 if (snd_mask_empty(m))
293 return -EINVAL;
294 if (!(params->rmask & (1 << k)))
295 continue;
296#ifdef RULES_DEBUG
09e56df8
TI		 297 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
298 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
1da177e4
LT		 299#endif
300 changed = snd_mask_refine(m, constrs_mask(constrs, k));
301#ifdef RULES_DEBUG
09e56df8 302 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
1da177e4
LT		 303#endif
304 if (changed)
305 params->cmask |= 1 << k;
306 if (changed < 0)
307 return changed;
308 }
309
310 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
311 i = hw_param_interval(params, k);
312 if (snd_interval_empty(i))
313 return -EINVAL;
314 if (!(params->rmask & (1 << k)))
315 continue;
316#ifdef RULES_DEBUG
09e56df8 317 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
1da177e4 318 if (i->empty)
09e56df8 319 pr_cont("empty");
1da177e4 320 else
09e56df8 321 pr_cont("%c%u %u%c",
1da177e4
LT		 322 i->openmin ? '(' : '[', i->min,
323 i->max, i->openmax ? ')' : ']');
09e56df8 324 pr_cont(" -> ");
1da177e4
LT		 325#endif
326 changed = snd_interval_refine(i, constrs_interval(constrs, k));
327#ifdef RULES_DEBUG
328 if (i->empty)
09e56df8 329 pr_cont("empty\n");
1da177e4 330 else
09e56df8 331 pr_cont("%c%u %u%c\n",
1da177e4
LT		 332 i->openmin ? '(' : '[', i->min,
333 i->max, i->openmax ? ')' : ']');
334#endif
335 if (changed)
336 params->cmask |= 1 << k;
337 if (changed < 0)
338 return changed;
339 }
340
341 for (k = 0; k < constrs->rules_num; k++)
342 rstamps[k] = 0;
343 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
344 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
345 do {
346 again = 0;
347 for (k = 0; k < constrs->rules_num; k++) {
877211f5 348 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 349 unsigned int d;
350 int doit = 0;
351 if (r->cond && !(r->cond & params->flags))
352 continue;
353 for (d = 0; r->deps[d] >= 0; d++) {
354 if (vstamps[r->deps[d]] > rstamps[k]) {
355 doit = 1;
356 break;
357 }
358 }
359 if (!doit)
360 continue;
361#ifdef RULES_DEBUG
09e56df8 362 pr_debug("Rule %d [%p]: ", k, r->func);
1da177e4 363 if (r->var >= 0) {
09e56df8 364 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]);
1da177e4
LT		 365 if (hw_is_mask(r->var)) {
366 m = hw_param_mask(params, r->var);
09e56df8 367 pr_cont("%x", *m->bits);
1da177e4
LT		 368 } else {
369 i = hw_param_interval(params, r->var);
370 if (i->empty)
09e56df8 371 pr_cont("empty");
1da177e4 372 else
09e56df8 373 pr_cont("%c%u %u%c",
1da177e4
LT		 374 i->openmin ? '(' : '[', i->min,
375 i->max, i->openmax ? ')' : ']');
376 }
377 }
378#endif
379 changed = r->func(params, r);
380#ifdef RULES_DEBUG
381 if (r->var >= 0) {
09e56df8 382 pr_cont(" -> ");
1da177e4 383 if (hw_is_mask(r->var))
09e56df8 384 pr_cont("%x", *m->bits);
1da177e4
LT		 385 else {
386 if (i->empty)
09e56df8 387 pr_cont("empty");
1da177e4 388 else
09e56df8 389 pr_cont("%c%u %u%c",
1da177e4
LT		 390 i->openmin ? '(' : '[', i->min,
391 i->max, i->openmax ? ')' : ']');
392 }
393 }
09e56df8 394 pr_cont("\n");
1da177e4
LT		 395#endif
396 rstamps[k] = stamp;
397 if (changed && r->var >= 0) {
398 params->cmask |= (1 << r->var);
399 vstamps[r->var] = stamp;
400 again = 1;
401 }
402 if (changed < 0)
403 return changed;
404 stamp++;
405 }
406 } while (again);
407 if (!params->msbits) {
408 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
409 if (snd_interval_single(i))
410 params->msbits = snd_interval_value(i);
411 }
412
413 if (!params->rate_den) {
414 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
415 if (snd_interval_single(i)) {
416 params->rate_num = snd_interval_value(i);
417 params->rate_den = 1;
418 }
419 }
420
421 hw = &substream->runtime->hw;
63825f3a 422 if (!params->info) {
8bea869c 423 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
63825f3a
TI		 424 if (!hw_support_mmap(substream))
425 params->info &= ~(SNDRV_PCM_INFO_MMAP |
426 SNDRV_PCM_INFO_MMAP_VALID);
427 }
8bea869c 428 if (!params->fifo_size) {
3be522a9
JK		 429 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
430 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
431 if (snd_mask_min(m) == snd_mask_max(m) &&
432 snd_interval_min(i) == snd_interval_max(i)) {
8bea869c
JK		 433 changed = substream->ops->ioctl(substream,
434 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
8bd9bca3 435 if (changed < 0)
8bea869c
JK		 436 return changed;
437 }
438 }
1da177e4
LT		 439 params->rmask = 0;
440 return 0;
441}
442
e88e8ae6
TI		 443EXPORT_SYMBOL(snd_pcm_hw_refine);
444
877211f5
TI		 445static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
446 struct snd_pcm_hw_params __user * _params)
1da177e4 447{
877211f5 448 struct snd_pcm_hw_params *params;
1da177e4
LT		 449 int err;
450
ef44a1ec
LZ		 451 params = memdup_user(_params, sizeof(*params));
452 if (IS_ERR(params))
453 return PTR_ERR(params);
454
1da177e4
LT		 455 err = snd_pcm_hw_refine(substream, params);
456 if (copy_to_user(_params, params, sizeof(*params))) {
457 if (!err)
458 err = -EFAULT;
459 }
ef44a1ec 460
1da177e4
LT		 461 kfree(params);
462 return err;
463}
464
9442e691
TI		 465static int period_to_usecs(struct snd_pcm_runtime *runtime)
466{
467 int usecs;
468
469 if (! runtime->rate)
470 return -1; /* invalid */
471
472 /* take 75% of period time as the deadline */
473 usecs = (750000 / runtime->rate) * runtime->period_size;
474 usecs += ((750000 % runtime->rate) * runtime->period_size) /
475 runtime->rate;
476
477 return usecs;
478}
479
9b0573c0
TI		 480static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
481{
482 snd_pcm_stream_lock_irq(substream);
483 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
484 substream->runtime->status->state = state;
485 snd_pcm_stream_unlock_irq(substream);
486}
487
877211f5
TI		 488static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
489 struct snd_pcm_hw_params *params)
1da177e4 490{
877211f5 491 struct snd_pcm_runtime *runtime;
9442e691 492 int err, usecs;
1da177e4
LT		 493 unsigned int bits;
494 snd_pcm_uframes_t frames;
495
7eaa943c
TI		 496 if (PCM_RUNTIME_CHECK(substream))
497 return -ENXIO;
1da177e4 498 runtime = substream->runtime;
1da177e4
LT		 499 snd_pcm_stream_lock_irq(substream);
500 switch (runtime->status->state) {
501 case SNDRV_PCM_STATE_OPEN:
502 case SNDRV_PCM_STATE_SETUP:
503 case SNDRV_PCM_STATE_PREPARED:
504 break;
505 default:
506 snd_pcm_stream_unlock_irq(substream);
507 return -EBADFD;
508 }
509 snd_pcm_stream_unlock_irq(substream);
8eeaa2f9 510#if IS_ENABLED(CONFIG_SND_PCM_OSS)
1da177e4
LT		 511 if (!substream->oss.oss)
512#endif
9c323fcb 513 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 514 return -EBADFD;
515
516 params->rmask = ~0U;
517 err = snd_pcm_hw_refine(substream, params);
518 if (err < 0)
519 goto _error;
520
521 err = snd_pcm_hw_params_choose(substream, params);
522 if (err < 0)
523 goto _error;
524
525 if (substream->ops->hw_params != NULL) {
526 err = substream->ops->hw_params(substream, params);
527 if (err < 0)
528 goto _error;
529 }
530
531 runtime->access = params_access(params);
532 runtime->format = params_format(params);
533 runtime->subformat = params_subformat(params);
534 runtime->channels = params_channels(params);
535 runtime->rate = params_rate(params);
536 runtime->period_size = params_period_size(params);
537 runtime->periods = params_periods(params);
538 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 539 runtime->info = params->info;
540 runtime->rate_num = params->rate_num;
541 runtime->rate_den = params->rate_den;
ab69a490
CL		 542 runtime->no_period_wakeup =
543 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
544 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 545
546 bits = snd_pcm_format_physical_width(runtime->format);
547 runtime->sample_bits = bits;
548 bits *= runtime->channels;
549 runtime->frame_bits = bits;
550 frames = 1;
551 while (bits % 8 != 0) {
552 bits *= 2;
553 frames *= 2;
554 }
555 runtime->byte_align = bits / 8;
556 runtime->min_align = frames;
557
558 /* Default sw params */
559 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
560 runtime->period_step = 1;
1da177e4 561 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 562 runtime->start_threshold = 1;
563 runtime->stop_threshold = runtime->buffer_size;
564 runtime->silence_threshold = 0;
565 runtime->silence_size = 0;
ead4046b
CL		 566 runtime->boundary = runtime->buffer_size;
567 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
568 runtime->boundary *= 2;
1da177e4
LT		 569
570 snd_pcm_timer_resolution_change(substream);
9b0573c0 571 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
9442e691 572
82f68251
JB		 573 if (pm_qos_request_active(&substream->latency_pm_qos_req))
574 pm_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 575 if ((usecs = period_to_usecs(runtime)) >= 0)
82f68251
JB		 576 pm_qos_add_request(&substream->latency_pm_qos_req,
577 PM_QOS_CPU_DMA_LATENCY, usecs);
1da177e4
LT		 578 return 0;
579 _error:
25985edc 580 /* hardware might be unusable from this time,
1da177e4
LT		 581 so we force application to retry to set
582 the correct hardware parameter settings */
9b0573c0 583 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
1da177e4
LT		 584 if (substream->ops->hw_free != NULL)
585 substream->ops->hw_free(substream);
586 return err;
587}
588
877211f5
TI		 589static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
590 struct snd_pcm_hw_params __user * _params)
1da177e4 591{
877211f5 592 struct snd_pcm_hw_params *params;
1da177e4
LT		 593 int err;
594
ef44a1ec
LZ		 595 params = memdup_user(_params, sizeof(*params));
596 if (IS_ERR(params))
597 return PTR_ERR(params);
598
1da177e4
LT		 599 err = snd_pcm_hw_params(substream, params);
600 if (copy_to_user(_params, params, sizeof(*params))) {
601 if (!err)
602 err = -EFAULT;
603 }
ef44a1ec 604
1da177e4
LT		 605 kfree(params);
606 return err;
607}
608
877211f5 609static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 610{
877211f5 611 struct snd_pcm_runtime *runtime;
1da177e4
LT		 612 int result = 0;
613
7eaa943c
TI		 614 if (PCM_RUNTIME_CHECK(substream))
615 return -ENXIO;
1da177e4 616 runtime = substream->runtime;
1da177e4
LT		 617 snd_pcm_stream_lock_irq(substream);
618 switch (runtime->status->state) {
619 case SNDRV_PCM_STATE_SETUP:
620 case SNDRV_PCM_STATE_PREPARED:
621 break;
622 default:
623 snd_pcm_stream_unlock_irq(substream);
624 return -EBADFD;
625 }
626 snd_pcm_stream_unlock_irq(substream);
9c323fcb 627 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 628 return -EBADFD;
629 if (substream->ops->hw_free)
630 result = substream->ops->hw_free(substream);
9b0573c0 631 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
82f68251 632 pm_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 633 return result;
634}
635
877211f5
TI		 636static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
637 struct snd_pcm_sw_params *params)
1da177e4 638{
877211f5 639 struct snd_pcm_runtime *runtime;
1250932e 640 int err;
1da177e4 641
7eaa943c
TI		 642 if (PCM_RUNTIME_CHECK(substream))
643 return -ENXIO;
1da177e4 644 runtime = substream->runtime;
1da177e4
LT		 645 snd_pcm_stream_lock_irq(substream);
646 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
647 snd_pcm_stream_unlock_irq(substream);
648 return -EBADFD;
649 }
650 snd_pcm_stream_unlock_irq(substream);
651
652 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
653 return -EINVAL;
58900810
TI		 654 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
655 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
5646eda5 656 return -EINVAL;
1da177e4
LT		 657 if (params->avail_min == 0)
658 return -EINVAL;
1da177e4
LT		 659 if (params->silence_size >= runtime->boundary) {
660 if (params->silence_threshold != 0)
661 return -EINVAL;
662 } else {
663 if (params->silence_size > params->silence_threshold)
664 return -EINVAL;
665 if (params->silence_threshold > runtime->buffer_size)
666 return -EINVAL;
667 }
1250932e 668 err = 0;
1da177e4
LT		 669 snd_pcm_stream_lock_irq(substream);
670 runtime->tstamp_mode = params->tstamp_mode;
58900810
TI		 671 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
672 runtime->tstamp_type = params->tstamp_type;
1da177e4
LT		 673 runtime->period_step = params->period_step;
674 runtime->control->avail_min = params->avail_min;
675 runtime->start_threshold = params->start_threshold;
676 runtime->stop_threshold = params->stop_threshold;
677 runtime->silence_threshold = params->silence_threshold;
678 runtime->silence_size = params->silence_size;
1da177e4
LT		 679 params->boundary = runtime->boundary;
680 if (snd_pcm_running(substream)) {
1da177e4
LT		 681 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
682 runtime->silence_size > 0)
683 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 684 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 685 }
686 snd_pcm_stream_unlock_irq(substream);
1250932e 687 return err;
1da177e4
LT		 688}
689
877211f5
TI		 690static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
691 struct snd_pcm_sw_params __user * _params)
1da177e4 692{
877211f5 693 struct snd_pcm_sw_params params;
1da177e4
LT		 694 int err;
695 if (copy_from_user(&params, _params, sizeof(params)))
696 return -EFAULT;
697 err = snd_pcm_sw_params(substream, &params);
698 if (copy_to_user(_params, &params, sizeof(params)))
699 return -EFAULT;
700 return err;
701}
702
877211f5
TI		 703int snd_pcm_status(struct snd_pcm_substream *substream,
704 struct snd_pcm_status *status)
1da177e4 705{
877211f5 706 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 707
708 snd_pcm_stream_lock_irq(substream);
709 status->state = runtime->status->state;
710 status->suspended_state = runtime->status->suspended_state;
711 if (status->state == SNDRV_PCM_STATE_OPEN)
712 goto _end;
713 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 714 if (snd_pcm_running(substream)) {
1da177e4 715 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 716 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
717 status->tstamp = runtime->status->tstamp;
4eeaaeae
PLB		 718 status->audio_tstamp =
719 runtime->status->audio_tstamp;
8c121586
JK		 720 goto _tstamp_end;
721 }
722 }
a713b583 723 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 724 _tstamp_end:
1da177e4
LT		 725 status->appl_ptr = runtime->control->appl_ptr;
726 status->hw_ptr = runtime->status->hw_ptr;
727 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
728 status->avail = snd_pcm_playback_avail(runtime);
729 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 730 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 731 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 732 status->delay += runtime->delay;
733 } else
1da177e4
LT		 734 status->delay = 0;
735 } else {
736 status->avail = snd_pcm_capture_avail(runtime);
737 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 738 status->delay = status->avail + runtime->delay;
1da177e4
LT		 739 else
740 status->delay = 0;
741 }
742 status->avail_max = runtime->avail_max;
743 status->overrange = runtime->overrange;
744 runtime->avail_max = 0;
745 runtime->overrange = 0;
746 _end:
747 snd_pcm_stream_unlock_irq(substream);
748 return 0;
749}
750
877211f5
TI		 751static int snd_pcm_status_user(struct snd_pcm_substream *substream,
752 struct snd_pcm_status __user * _status)
1da177e4 753{
877211f5 754 struct snd_pcm_status status;
1da177e4
LT		 755 int res;
756
1da177e4
LT		 757 memset(&status, 0, sizeof(status));
758 res = snd_pcm_status(substream, &status);
759 if (res < 0)
760 return res;
761 if (copy_to_user(_status, &status, sizeof(status)))
762 return -EFAULT;
763 return 0;
764}
765
877211f5
TI		 766static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
767 struct snd_pcm_channel_info * info)
1da177e4 768{
877211f5 769 struct snd_pcm_runtime *runtime;
1da177e4
LT		 770 unsigned int channel;
771
1da177e4
LT		 772 channel = info->channel;
773 runtime = substream->runtime;
774 snd_pcm_stream_lock_irq(substream);
775 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
776 snd_pcm_stream_unlock_irq(substream);
777 return -EBADFD;
778 }
779 snd_pcm_stream_unlock_irq(substream);
780 if (channel >= runtime->channels)
781 return -EINVAL;
782 memset(info, 0, sizeof(*info));
783 info->channel = channel;
784 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
785}
786
877211f5
TI		 787static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
788 struct snd_pcm_channel_info __user * _info)
1da177e4 789{
877211f5 790 struct snd_pcm_channel_info info;
1da177e4
LT		 791 int res;
792
793 if (copy_from_user(&info, _info, sizeof(info)))
794 return -EFAULT;
795 res = snd_pcm_channel_info(substream, &info);
796 if (res < 0)
797 return res;
798 if (copy_to_user(_info, &info, sizeof(info)))
799 return -EFAULT;
800 return 0;
801}
802
877211f5 803static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 804{
877211f5 805 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 806 if (runtime->trigger_master == NULL)
807 return;
808 if (runtime->trigger_master == substream) {
b751eef1 809 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 810 } else {
811 snd_pcm_trigger_tstamp(runtime->trigger_master);
812 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
813 }
814 runtime->trigger_master = NULL;
815}
816
817struct action_ops {
877211f5
TI		 818 int (*pre_action)(struct snd_pcm_substream *substream, int state);
819 int (*do_action)(struct snd_pcm_substream *substream, int state);
820 void (*undo_action)(struct snd_pcm_substream *substream, int state);
821 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 822};
823
824/*
825 * this functions is core for handling of linked stream
826 * Note: the stream state might be changed also on failure
827 * Note2: call with calling stream lock + link lock
828 */
829static int snd_pcm_action_group(struct action_ops *ops,
877211f5 830 struct snd_pcm_substream *substream,
1da177e4
LT		 831 int state, int do_lock)
832{
877211f5
TI		 833 struct snd_pcm_substream *s = NULL;
834 struct snd_pcm_substream *s1;
dde1c652 835 int res = 0, depth = 1;
1da177e4 836
ef991b95 837 snd_pcm_group_for_each_entry(s, substream) {
257f8cce
TI		 838 if (do_lock && s != substream) {
839 if (s->pcm->nonatomic)
dde1c652 840 mutex_lock_nested(&s->self_group.mutex, depth);
257f8cce 841 else
dde1c652
TI		 842 spin_lock_nested(&s->self_group.lock, depth);
843 depth++;
257f8cce 844 }
1da177e4
LT		 845 res = ops->pre_action(s, state);
846 if (res < 0)
847 goto _unlock;
848 }
ef991b95 849 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 850 res = ops->do_action(s, state);
851 if (res < 0) {
852 if (ops->undo_action) {
ef991b95 853 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 854 if (s1 == s) /* failed stream */
855 break;
856 ops->undo_action(s1, state);
857 }
858 }
859 s = NULL; /* unlock all */
860 goto _unlock;
861 }
862 }
ef991b95 863 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 864 ops->post_action(s, state);
865 }
866 _unlock:
867 if (do_lock) {
868 /* unlock streams */
ef991b95 869 snd_pcm_group_for_each_entry(s1, substream) {
257f8cce 870 if (s1 != substream) {
811deede 871 if (s1->pcm->nonatomic)
257f8cce
TI		 872 mutex_unlock(&s1->self_group.mutex);
873 else
874 spin_unlock(&s1->self_group.lock);
875 }
1da177e4
LT		 876 if (s1 == s) /* end */
877 break;
878 }
879 }
880 return res;
881}
882
883/*
884 * Note: call with stream lock
885 */
886static int snd_pcm_action_single(struct action_ops *ops,
877211f5 887 struct snd_pcm_substream *substream,
1da177e4
LT		 888 int state)
889{
890 int res;
891
892 res = ops->pre_action(substream, state);
893 if (res < 0)
894 return res;
895 res = ops->do_action(substream, state);
896 if (res == 0)
897 ops->post_action(substream, state);
898 else if (ops->undo_action)
899 ops->undo_action(substream, state);
900 return res;
901}
902
257f8cce
TI		 903/* call in mutex-protected context */
904static int snd_pcm_action_mutex(struct action_ops *ops,
905 struct snd_pcm_substream *substream,
906 int state)
907{
908 int res;
909
910 if (snd_pcm_stream_linked(substream)) {
911 if (!mutex_trylock(&substream->group->mutex)) {
912 mutex_unlock(&substream->self_group.mutex);
913 mutex_lock(&substream->group->mutex);
914 mutex_lock(&substream->self_group.mutex);
915 }
916 res = snd_pcm_action_group(ops, substream, state, 1);
917 mutex_unlock(&substream->group->mutex);
918 } else {
919 res = snd_pcm_action_single(ops, substream, state);
920 }
921 return res;
922}
923
1da177e4
LT		 924/*
925 * Note: call with stream lock
926 */
927static int snd_pcm_action(struct action_ops *ops,
877211f5 928 struct snd_pcm_substream *substream,
1da177e4
LT		 929 int state)
930{
931 int res;
932
257f8cce
TI		 933 if (substream->pcm->nonatomic)
934 return snd_pcm_action_mutex(ops, substream, state);
935
1da177e4
LT		 936 if (snd_pcm_stream_linked(substream)) {
937 if (!spin_trylock(&substream->group->lock)) {
938 spin_unlock(&substream->self_group.lock);
939 spin_lock(&substream->group->lock);
940 spin_lock(&substream->self_group.lock);
941 }
942 res = snd_pcm_action_group(ops, substream, state, 1);
943 spin_unlock(&substream->group->lock);
944 } else {
945 res = snd_pcm_action_single(ops, substream, state);
946 }
947 return res;
948}
949
950/*
951 * Note: don't use any locks before
952 */
953static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 954 struct snd_pcm_substream *substream,
1da177e4
LT		 955 int state)
956{
957 int res;
958
e3a4bd5e
TI		 959 snd_pcm_stream_lock_irq(substream);
960 res = snd_pcm_action(ops, substream, state);
961 snd_pcm_stream_unlock_irq(substream);
1da177e4
LT		 962 return res;
963}
964
965/*
966 */
967static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 968 struct snd_pcm_substream *substream,
1da177e4
LT		 969 int state)
970{
971 int res;
972
973 down_read(&snd_pcm_link_rwsem);
974 if (snd_pcm_stream_linked(substream))
975 res = snd_pcm_action_group(ops, substream, state, 0);
976 else
977 res = snd_pcm_action_single(ops, substream, state);
978 up_read(&snd_pcm_link_rwsem);
979 return res;
980}
981
982/*
983 * start callbacks
984 */
877211f5 985static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 986{
877211f5 987 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 988 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
989 return -EBADFD;
990 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
991 !snd_pcm_playback_data(substream))
992 return -EPIPE;
993 runtime->trigger_master = substream;
994 return 0;
995}
996
877211f5 997static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 998{
999 if (substream->runtime->trigger_master != substream)
1000 return 0;
1001 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1002}
1003
877211f5 1004static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1005{
1006 if (substream->runtime->trigger_master == substream)
1007 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1008}
1009
877211f5 1010static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 1011{
877211f5 1012 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1013 snd_pcm_trigger_tstamp(substream);
6af3fb72 1014 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 1015 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1016 runtime->rate;
1da177e4
LT		 1017 runtime->status->state = state;
1018 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1019 runtime->silence_size > 0)
1020 snd_pcm_playback_silence(substream, ULONG_MAX);
1da177e4 1021 if (substream->timer)
877211f5
TI		 1022 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
1023 &runtime->trigger_tstamp);
1da177e4
LT		 1024}
1025
1026static struct action_ops snd_pcm_action_start = {
1027 .pre_action = snd_pcm_pre_start,
1028 .do_action = snd_pcm_do_start,
1029 .undo_action = snd_pcm_undo_start,
1030 .post_action = snd_pcm_post_start
1031};
1032
1033/**
1c85cc64 1034 * snd_pcm_start - start all linked streams
df8db936 1035 * @substream: the PCM substream instance
eb7c06e8
YB		 1036 *
1037 * Return: Zero if successful, or a negative error code.
1da177e4 1038 */
877211f5 1039int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 1040{
877211f5
TI		 1041 return snd_pcm_action(&snd_pcm_action_start, substream,
1042 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 1043}
1044
1045/*
1046 * stop callbacks
1047 */
877211f5 1048static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1049{
877211f5 1050 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1051 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1052 return -EBADFD;
1053 runtime->trigger_master = substream;
1054 return 0;
1055}
1056
877211f5 1057static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1058{
1059 if (substream->runtime->trigger_master == substream &&
1060 snd_pcm_running(substream))
1061 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1062 return 0; /* unconditonally stop all substreams */
1063}
1064
877211f5 1065static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1066{
877211f5 1067 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1068 if (runtime->status->state != state) {
1069 snd_pcm_trigger_tstamp(substream);
1070 if (substream->timer)
877211f5
TI		 1071 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
1072 &runtime->trigger_tstamp);
1da177e4 1073 runtime->status->state = state;
1da177e4
LT		 1074 }
1075 wake_up(&runtime->sleep);
c91a988d 1076 wake_up(&runtime->tsleep);
1da177e4
LT		 1077}
1078
1079static struct action_ops snd_pcm_action_stop = {
1080 .pre_action = snd_pcm_pre_stop,
1081 .do_action = snd_pcm_do_stop,
1082 .post_action = snd_pcm_post_stop
1083};
1084
1085/**
1c85cc64 1086 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 1087 * @substream: the PCM substream instance
1088 * @state: PCM state after stopping the stream
1da177e4 1089 *
1c85cc64 1090 * The state of each stream is then changed to the given state unconditionally.
eb7c06e8 1091 *
0a11458c 1092 * Return: Zero if successful, or a negative error code.
1da177e4 1093 */
fea952e5 1094int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 1095{
1096 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1097}
1098
e88e8ae6
TI		 1099EXPORT_SYMBOL(snd_pcm_stop);
1100
1da177e4 1101/**
1c85cc64 1102 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 1103 * @substream: the PCM substream
1da177e4 1104 *
1c85cc64 1105 * After stopping, the state is changed to SETUP.
1da177e4 1106 * Unlike snd_pcm_stop(), this affects only the given stream.
eb7c06e8
YB		 1107 *
1108 * Return: Zero if succesful, or a negative error code.
1da177e4 1109 */
877211f5 1110int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 1111{
877211f5
TI		 1112 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1113 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 1114}
1115
1116/*
1117 * pause callbacks
1118 */
877211f5 1119static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1120{
877211f5 1121 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1122 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1123 return -ENOSYS;
1124 if (push) {
1125 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1126 return -EBADFD;
1127 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1128 return -EBADFD;
1129 runtime->trigger_master = substream;
1130 return 0;
1131}
1132
877211f5 1133static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1134{
1135 if (substream->runtime->trigger_master != substream)
1136 return 0;
56385a12
JK		 1137 /* some drivers might use hw_ptr to recover from the pause -
1138 update the hw_ptr now */
1139 if (push)
1140 snd_pcm_update_hw_ptr(substream);
6af3fb72 1141 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 1142 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1143 * delta, effectively to skip the check once.
1144 */
1145 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 1146 return substream->ops->trigger(substream,
1147 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1148 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1149}
1150
877211f5 1151static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1152{
1153 if (substream->runtime->trigger_master == substream)
1154 substream->ops->trigger(substream,
1155 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1156 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1157}
1158
877211f5 1159static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1160{
877211f5 1161 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1162 snd_pcm_trigger_tstamp(substream);
1163 if (push) {
1164 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1165 if (substream->timer)
877211f5
TI		 1166 snd_timer_notify(substream->timer,
1167 SNDRV_TIMER_EVENT_MPAUSE,
1168 &runtime->trigger_tstamp);
1da177e4 1169 wake_up(&runtime->sleep);
c91a988d 1170 wake_up(&runtime->tsleep);
1da177e4
LT		 1171 } else {
1172 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1da177e4 1173 if (substream->timer)
877211f5
TI		 1174 snd_timer_notify(substream->timer,
1175 SNDRV_TIMER_EVENT_MCONTINUE,
1176 &runtime->trigger_tstamp);
1da177e4
LT		 1177 }
1178}
1179
1180static struct action_ops snd_pcm_action_pause = {
1181 .pre_action = snd_pcm_pre_pause,
1182 .do_action = snd_pcm_do_pause,
1183 .undo_action = snd_pcm_undo_pause,
1184 .post_action = snd_pcm_post_pause
1185};
1186
1187/*
1188 * Push/release the pause for all linked streams.
1189 */
877211f5 1190static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1191{
1192 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1193}
1194
1195#ifdef CONFIG_PM
1196/* suspend */
1197
877211f5 1198static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1199{
877211f5 1200 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1201 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1202 return -EBUSY;
1203 runtime->trigger_master = substream;
1204 return 0;
1205}
1206
877211f5 1207static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1208{
877211f5 1209 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1210 if (runtime->trigger_master != substream)
1211 return 0;
1212 if (! snd_pcm_running(substream))
1213 return 0;
1214 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1215 return 0; /* suspend unconditionally */
1216}
1217
877211f5 1218static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1219{
877211f5 1220 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1221 snd_pcm_trigger_tstamp(substream);
1222 if (substream->timer)
877211f5
TI		 1223 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1224 &runtime->trigger_tstamp);
1da177e4
LT		 1225 runtime->status->suspended_state = runtime->status->state;
1226 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1da177e4 1227 wake_up(&runtime->sleep);
c91a988d 1228 wake_up(&runtime->tsleep);
1da177e4
LT		 1229}
1230
1231static struct action_ops snd_pcm_action_suspend = {
1232 .pre_action = snd_pcm_pre_suspend,
1233 .do_action = snd_pcm_do_suspend,
1234 .post_action = snd_pcm_post_suspend
1235};
1236
1237/**
1c85cc64 1238 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1239 * @substream: the PCM substream
1da177e4 1240 *
1da177e4 1241 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1242 *
1243 * Return: Zero if successful (or @substream is %NULL), or a negative error
1244 * code.
1da177e4 1245 */
877211f5 1246int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1247{
1248 int err;
1249 unsigned long flags;
1250
603bf524
TI		 1251 if (! substream)
1252 return 0;
1253
1da177e4
LT		 1254 snd_pcm_stream_lock_irqsave(substream, flags);
1255 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1256 snd_pcm_stream_unlock_irqrestore(substream, flags);
1257 return err;
1258}
1259
e88e8ae6
TI		 1260EXPORT_SYMBOL(snd_pcm_suspend);
1261
1da177e4 1262/**
1c85cc64 1263 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1264 * @pcm: the PCM instance
1da177e4 1265 *
1da177e4 1266 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1267 *
1268 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1da177e4 1269 */
877211f5 1270int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1271{
877211f5 1272 struct snd_pcm_substream *substream;
1da177e4
LT		 1273 int stream, err = 0;
1274
603bf524
TI		 1275 if (! pcm)
1276 return 0;
1277
1da177e4 1278 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1279 for (substream = pcm->streams[stream].substream;
1280 substream; substream = substream->next) {
1da177e4
LT		 1281 /* FIXME: the open/close code should lock this as well */
1282 if (substream->runtime == NULL)
1283 continue;
1284 err = snd_pcm_suspend(substream);
1285 if (err < 0 && err != -EBUSY)
1286 return err;
1287 }
1288 }
1289 return 0;
1290}
1291
e88e8ae6
TI		 1292EXPORT_SYMBOL(snd_pcm_suspend_all);
1293
1da177e4
LT		 1294/* resume */
1295
877211f5 1296static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1297{
877211f5 1298 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1299 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1300 return -ENOSYS;
1301 runtime->trigger_master = substream;
1302 return 0;
1303}
1304
877211f5 1305static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1306{
877211f5 1307 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1308 if (runtime->trigger_master != substream)
1309 return 0;
1310 /* DMA not running previously? */
1311 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1312 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1313 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1314 return 0;
1315 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1316}
1317
877211f5 1318static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1319{
1320 if (substream->runtime->trigger_master == substream &&
1321 snd_pcm_running(substream))
1322 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1323}
1324
877211f5 1325static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1326{
877211f5 1327 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1328 snd_pcm_trigger_tstamp(substream);
1329 if (substream->timer)
877211f5
TI		 1330 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1331 &runtime->trigger_tstamp);
1da177e4 1332 runtime->status->state = runtime->status->suspended_state;
1da177e4
LT		 1333}
1334
1335static struct action_ops snd_pcm_action_resume = {
1336 .pre_action = snd_pcm_pre_resume,
1337 .do_action = snd_pcm_do_resume,
1338 .undo_action = snd_pcm_undo_resume,
1339 .post_action = snd_pcm_post_resume
1340};
1341
877211f5 1342static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1343{
877211f5 1344 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1345 int res;
1346
1347 snd_power_lock(card);
cbac4b0c 1348 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1349 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1350 snd_power_unlock(card);
1351 return res;
1352}
1353
1354#else
1355
877211f5 1356static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1357{
1358 return -ENOSYS;
1359}
1360
1361#endif /* CONFIG_PM */
1362
1363/*
1364 * xrun ioctl
1365 *
1366 * Change the RUNNING stream(s) to XRUN state.
1367 */
877211f5 1368static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1369{
877211f5
TI		 1370 struct snd_card *card = substream->pcm->card;
1371 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1372 int result;
1373
1374 snd_power_lock(card);
1375 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1376 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1377 if (result < 0)
1378 goto _unlock;
1379 }
1380
1381 snd_pcm_stream_lock_irq(substream);
1382 switch (runtime->status->state) {
1383 case SNDRV_PCM_STATE_XRUN:
1384 result = 0; /* already there */
1385 break;
1386 case SNDRV_PCM_STATE_RUNNING:
1387 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1388 break;
1389 default:
1390 result = -EBADFD;
1391 }
1392 snd_pcm_stream_unlock_irq(substream);
1393 _unlock:
1394 snd_power_unlock(card);
1395 return result;
1396}
1397
1398/*
1399 * reset ioctl
1400 */
877211f5 1401static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1402{
877211f5 1403 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1404 switch (runtime->status->state) {
1405 case SNDRV_PCM_STATE_RUNNING:
1406 case SNDRV_PCM_STATE_PREPARED:
1407 case SNDRV_PCM_STATE_PAUSED:
1408 case SNDRV_PCM_STATE_SUSPENDED:
1409 return 0;
1410 default:
1411 return -EBADFD;
1412 }
1413}
1414
877211f5 1415static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1416{
877211f5 1417 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1418 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1419 if (err < 0)
1420 return err;
1da177e4 1421 runtime->hw_ptr_base = 0;
e7636925
JK		 1422 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1423 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1424 runtime->silence_start = runtime->status->hw_ptr;
1425 runtime->silence_filled = 0;
1426 return 0;
1427}
1428
877211f5 1429static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1430{
877211f5 1431 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1432 runtime->control->appl_ptr = runtime->status->hw_ptr;
1433 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1434 runtime->silence_size > 0)
1435 snd_pcm_playback_silence(substream, ULONG_MAX);
1436}
1437
1438static struct action_ops snd_pcm_action_reset = {
1439 .pre_action = snd_pcm_pre_reset,
1440 .do_action = snd_pcm_do_reset,
1441 .post_action = snd_pcm_post_reset
1442};
1443
877211f5 1444static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1445{
1446 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1447}
1448
1449/*
1450 * prepare ioctl
1451 */
0df63e44
TI		 1452/* we use the second argument for updating f_flags */
1453static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1454 int f_flags)
1da177e4 1455{
877211f5 1456 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1457 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1458 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1459 return -EBADFD;
1460 if (snd_pcm_running(substream))
1461 return -EBUSY;
0df63e44 1462 substream->f_flags = f_flags;
1da177e4
LT		 1463 return 0;
1464}
1465
877211f5 1466static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1467{
1468 int err;
1469 err = substream->ops->prepare(substream);
1470 if (err < 0)
1471 return err;
1472 return snd_pcm_do_reset(substream, 0);
1473}
1474
877211f5 1475static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1476{
877211f5 1477 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1478 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1479 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1480}
1481
1482static struct action_ops snd_pcm_action_prepare = {
1483 .pre_action = snd_pcm_pre_prepare,
1484 .do_action = snd_pcm_do_prepare,
1485 .post_action = snd_pcm_post_prepare
1486};
1487
1488/**
1c85cc64 1489 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1490 * @substream: the PCM substream instance
0df63e44 1491 * @file: file to refer f_flags
eb7c06e8
YB		 1492 *
1493 * Return: Zero if successful, or a negative error code.
1da177e4 1494 */
0df63e44
TI		 1495static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1496 struct file *file)
1da177e4
LT		 1497{
1498 int res;
877211f5 1499 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1500 int f_flags;
1501
1502 if (file)
1503 f_flags = file->f_flags;
1504 else
1505 f_flags = substream->f_flags;
1da177e4
LT		 1506
1507 snd_power_lock(card);
cbac4b0c 1508 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1509 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1510 substream, f_flags);
1da177e4
LT		 1511 snd_power_unlock(card);
1512 return res;
1513}
1514
1515/*
1516 * drain ioctl
1517 */
1518
877211f5 1519static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1520{
4f7c39dc
TI		 1521 struct snd_pcm_runtime *runtime = substream->runtime;
1522 switch (runtime->status->state) {
1523 case SNDRV_PCM_STATE_OPEN:
1524 case SNDRV_PCM_STATE_DISCONNECTED:
1525 case SNDRV_PCM_STATE_SUSPENDED:
1526 return -EBADFD;
1527 }
1528 runtime->trigger_master = substream;
1da177e4
LT		 1529 return 0;
1530}
1531
877211f5 1532static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1533{
877211f5 1534 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1535 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1536 switch (runtime->status->state) {
1537 case SNDRV_PCM_STATE_PREPARED:
1538 /* start playback stream if possible */
1539 if (! snd_pcm_playback_empty(substream)) {
1540 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1541 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1542 }
1543 break;
1544 case SNDRV_PCM_STATE_RUNNING:
1545 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1546 break;
4f7c39dc
TI		 1547 case SNDRV_PCM_STATE_XRUN:
1548 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1549 break;
1da177e4
LT		 1550 default:
1551 break;
1552 }
1553 } else {
1554 /* stop running stream */
1555 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1556 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1557 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1558 snd_pcm_do_stop(substream, new_state);
1559 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1560 }
1561 }
1562 return 0;
1563}
1564
877211f5 1565static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1566{
1567}
1568
1569static struct action_ops snd_pcm_action_drain_init = {
1570 .pre_action = snd_pcm_pre_drain_init,
1571 .do_action = snd_pcm_do_drain_init,
1572 .post_action = snd_pcm_post_drain_init
1573};
1574
877211f5 1575static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1576
1577/*
1578 * Drain the stream(s).
1579 * When the substream is linked, sync until the draining of all playback streams
1580 * is finished.
1581 * After this call, all streams are supposed to be either SETUP or DRAINING
1582 * (capture only) state.
1583 */
4cdc115f
TI		 1584static int snd_pcm_drain(struct snd_pcm_substream *substream,
1585 struct file *file)
1da177e4 1586{
877211f5
TI		 1587 struct snd_card *card;
1588 struct snd_pcm_runtime *runtime;
ef991b95 1589 struct snd_pcm_substream *s;
d3a7dcfe 1590 wait_queue_t wait;
1da177e4 1591 int result = 0;
4cdc115f 1592 int nonblock = 0;
1da177e4 1593
1da177e4
LT		 1594 card = substream->pcm->card;
1595 runtime = substream->runtime;
1596
1597 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1598 return -EBADFD;
1599
1da177e4
LT		 1600 snd_power_lock(card);
1601 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1602 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1603 if (result < 0) {
1604 snd_power_unlock(card);
1605 return result;
1606 }
1da177e4
LT		 1607 }
1608
4cdc115f
TI		 1609 if (file) {
1610 if (file->f_flags & O_NONBLOCK)
1611 nonblock = 1;
1612 } else if (substream->f_flags & O_NONBLOCK)
1613 nonblock = 1;
1614
21cb2a2e 1615 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1616 snd_pcm_stream_lock_irq(substream);
1617 /* resume pause */
d3a7dcfe 1618 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1619 snd_pcm_pause(substream, 0);
1620
1621 /* pre-start/stop - all running streams are changed to DRAINING state */
1622 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1623 if (result < 0)
1624 goto unlock;
1625 /* in non-blocking, we don't wait in ioctl but let caller poll */
1626 if (nonblock) {
1627 result = -EAGAIN;
1628 goto unlock;
21cb2a2e 1629 }
1da177e4
LT		 1630
1631 for (;;) {
1632 long tout;
d3a7dcfe 1633 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1634 if (signal_pending(current)) {
1635 result = -ERESTARTSYS;
1636 break;
1637 }
d3a7dcfe
TI		 1638 /* find a substream to drain */
1639 to_check = NULL;
1640 snd_pcm_group_for_each_entry(s, substream) {
1641 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1642 continue;
1643 runtime = s->runtime;
1644 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1645 to_check = runtime;
21cb2a2e 1646 break;
d3a7dcfe 1647 }
21cb2a2e 1648 }
d3a7dcfe
TI		 1649 if (!to_check)
1650 break; /* all drained */
1651 init_waitqueue_entry(&wait, current);
1652 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1653 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1654 up_read(&snd_pcm_link_rwsem);
1da177e4 1655 snd_power_unlock(card);
f2b3614c
TI		 1656 if (runtime->no_period_wakeup)
1657 tout = MAX_SCHEDULE_TIMEOUT;
1658 else {
1659 tout = 10;
1660 if (runtime->rate) {
1661 long t = runtime->period_size * 2 / runtime->rate;
1662 tout = max(t, tout);
1663 }
1664 tout = msecs_to_jiffies(tout * 1000);
1665 }
1666 tout = schedule_timeout_interruptible(tout);
1da177e4 1667 snd_power_lock(card);
d3a7dcfe 1668 down_read(&snd_pcm_link_rwsem);
1da177e4 1669 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1670 remove_wait_queue(&to_check->sleep, &wait);
0914f796
TI		 1671 if (card->shutdown) {
1672 result = -ENODEV;
1673 break;
1674 }
1da177e4
LT		 1675 if (tout == 0) {
1676 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1677 result = -ESTRPIPE;
1678 else {
09e56df8
TI		 1679 dev_dbg(substream->pcm->card->dev,
1680 "playback drain error (DMA or IRQ trouble?)\n");
1da177e4
LT		 1681 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1682 result = -EIO;
1683 }
1684 break;
1685 }
1da177e4 1686 }
21cb2a2e 1687
4cdc115f 1688 unlock:
21cb2a2e 1689 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1690 up_read(&snd_pcm_link_rwsem);
1da177e4 1691 snd_power_unlock(card);
1da177e4
LT		 1692
1693 return result;
1694}
1695
1696/*
1697 * drop ioctl
1698 *
1699 * Immediately put all linked substreams into SETUP state.
1700 */
877211f5 1701static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1702{
877211f5 1703 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1704 int result = 0;
1705
7eaa943c
TI		 1706 if (PCM_RUNTIME_CHECK(substream))
1707 return -ENXIO;
1da177e4 1708 runtime = substream->runtime;
1da177e4 1709
de1b8b93 1710 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1711 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1712 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1713 return -EBADFD;
1714
1da177e4
LT		 1715 snd_pcm_stream_lock_irq(substream);
1716 /* resume pause */
1717 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1718 snd_pcm_pause(substream, 0);
1719
1720 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1721 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1722 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1723
1da177e4
LT		 1724 return result;
1725}
1726
1727
0888c321 1728static bool is_pcm_file(struct file *file)
1da177e4 1729{
0888c321 1730 struct inode *inode = file_inode(file);
f87135f5
CL		 1731 unsigned int minor;
1732
0888c321
AV		 1733 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1734 return false;
1da177e4 1735 minor = iminor(inode);
0888c321
AV		 1736 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1737 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1da177e4
LT		 1738}
1739
1740/*
1741 * PCM link handling
1742 */
877211f5 1743static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1744{
1745 int res = 0;
877211f5
TI		 1746 struct snd_pcm_file *pcm_file;
1747 struct snd_pcm_substream *substream1;
1662591b 1748 struct snd_pcm_group *group;
0888c321 1749 struct fd f = fdget(fd);
1da177e4 1750
0888c321 1751 if (!f.file)
1da177e4 1752 return -EBADFD;
0888c321
AV		 1753 if (!is_pcm_file(f.file)) {
1754 res = -EBADFD;
1755 goto _badf;
1756 }
1757 pcm_file = f.file->private_data;
1da177e4 1758 substream1 = pcm_file->substream;
1662591b
TI		 1759 group = kmalloc(sizeof(*group), GFP_KERNEL);
1760 if (!group) {
1761 res = -ENOMEM;
1762 goto _nolock;
1763 }
1da177e4
LT		 1764 down_write(&snd_pcm_link_rwsem);
1765 write_lock_irq(&snd_pcm_link_rwlock);
1766 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
257f8cce
TI		 1767 substream->runtime->status->state != substream1->runtime->status->state ||
1768 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1da177e4
LT		 1769 res = -EBADFD;
1770 goto _end;
1771 }
1772 if (snd_pcm_stream_linked(substream1)) {
1773 res = -EALREADY;
1774 goto _end;
1775 }
1776 if (!snd_pcm_stream_linked(substream)) {
1662591b 1777 substream->group = group;
dd6c5cd8 1778 group = NULL;
1da177e4 1779 spin_lock_init(&substream->group->lock);
257f8cce 1780 mutex_init(&substream->group->mutex);
1da177e4
LT		 1781 INIT_LIST_HEAD(&substream->group->substreams);
1782 list_add_tail(&substream->link_list, &substream->group->substreams);
1783 substream->group->count = 1;
1784 }
1785 list_add_tail(&substream1->link_list, &substream->group->substreams);
1786 substream->group->count++;
1787 substream1->group = substream->group;
1788 _end:
1789 write_unlock_irq(&snd_pcm_link_rwlock);
1790 up_write(&snd_pcm_link_rwsem);
1662591b 1791 _nolock:
a0830dbd 1792 snd_card_unref(substream1->pcm->card);
dd6c5cd8 1793 kfree(group);
0888c321
AV		 1794 _badf:
1795 fdput(f);
1da177e4
LT		 1796 return res;
1797}
1798
877211f5 1799static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1800{
1801 substream->group = &substream->self_group;
1802 INIT_LIST_HEAD(&substream->self_group.substreams);
1803 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1804}
1805
877211f5 1806static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1807{
ef991b95 1808 struct snd_pcm_substream *s;
1da177e4
LT		 1809 int res = 0;
1810
1811 down_write(&snd_pcm_link_rwsem);
1812 write_lock_irq(&snd_pcm_link_rwlock);
1813 if (!snd_pcm_stream_linked(substream)) {
1814 res = -EALREADY;
1815 goto _end;
1816 }
1817 list_del(&substream->link_list);
1818 substream->group->count--;
1819 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1820 snd_pcm_group_for_each_entry(s, substream) {
1821 relink_to_local(s);
1da177e4
LT		 1822 break;
1823 }
1824 kfree(substream->group);
1825 }
1826 relink_to_local(substream);
1827 _end:
1828 write_unlock_irq(&snd_pcm_link_rwlock);
1829 up_write(&snd_pcm_link_rwsem);
1830 return res;
1831}
1832
1833/*
1834 * hw configurator
1835 */
877211f5
TI		 1836static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1837 struct snd_pcm_hw_rule *rule)
1da177e4 1838{
877211f5 1839 struct snd_interval t;
1da177e4
LT		 1840 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1841 hw_param_interval_c(params, rule->deps[1]), &t);
1842 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1843}
1844
877211f5
TI		 1845static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1846 struct snd_pcm_hw_rule *rule)
1da177e4 1847{
877211f5 1848 struct snd_interval t;
1da177e4
LT		 1849 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1850 hw_param_interval_c(params, rule->deps[1]), &t);
1851 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1852}
1853
877211f5
TI		 1854static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1855 struct snd_pcm_hw_rule *rule)
1da177e4 1856{
877211f5 1857 struct snd_interval t;
1da177e4
LT		 1858 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1859 hw_param_interval_c(params, rule->deps[1]),
1860 (unsigned long) rule->private, &t);
1861 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1862}
1863
877211f5
TI		 1864static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1865 struct snd_pcm_hw_rule *rule)
1da177e4 1866{
877211f5 1867 struct snd_interval t;
1da177e4
LT		 1868 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1869 (unsigned long) rule->private,
1870 hw_param_interval_c(params, rule->deps[1]), &t);
1871 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1872}
1873
877211f5
TI		 1874static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1875 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1876{
1877 unsigned int k;
877211f5
TI		 1878 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1879 struct snd_mask m;
1880 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1881 snd_mask_any(&m);
1882 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1883 int bits;
1884 if (! snd_mask_test(mask, k))
1885 continue;
1886 bits = snd_pcm_format_physical_width(k);
1887 if (bits <= 0)
1888 continue; /* ignore invalid formats */
1889 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1890 snd_mask_reset(&m, k);
1891 }
1892 return snd_mask_refine(mask, &m);
1893}
1894
877211f5
TI		 1895static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1896 struct snd_pcm_hw_rule *rule)
1da177e4 1897{
877211f5 1898 struct snd_interval t;
1da177e4
LT		 1899 unsigned int k;
1900 t.min = UINT_MAX;
1901 t.max = 0;
1902 t.openmin = 0;
1903 t.openmax = 0;
1904 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1905 int bits;
1906 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1907 continue;
1908 bits = snd_pcm_format_physical_width(k);
1909 if (bits <= 0)
1910 continue; /* ignore invalid formats */
1911 if (t.min > (unsigned)bits)
1912 t.min = bits;
1913 if (t.max < (unsigned)bits)
1914 t.max = bits;
1915 }
1916 t.integer = 1;
1917 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1918}
1919
1920#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1921#error "Change this table"
1922#endif
1923
1924static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1925 48000, 64000, 88200, 96000, 176400, 192000 };
1926
7653d557
CL		 1927const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1928 .count = ARRAY_SIZE(rates),
1929 .list = rates,
1930};
1931
877211f5
TI		 1932static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1933 struct snd_pcm_hw_rule *rule)
1da177e4 1934{
877211f5 1935 struct snd_pcm_hardware *hw = rule->private;
1da177e4 1936 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 1937 snd_pcm_known_rates.count,
1938 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 1939}
1940
877211f5
TI		 1941static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1942 struct snd_pcm_hw_rule *rule)
1da177e4 1943{
877211f5
TI		 1944 struct snd_interval t;
1945 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1946 t.min = 0;
1947 t.max = substream->buffer_bytes_max;
1948 t.openmin = 0;
1949 t.openmax = 0;
1950 t.integer = 1;
1951 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1952}
1953
877211f5 1954int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1955{
877211f5
TI		 1956 struct snd_pcm_runtime *runtime = substream->runtime;
1957 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1958 int k, err;
1959
1960 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1961 snd_mask_any(constrs_mask(constrs, k));
1962 }
1963
1964 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1965 snd_interval_any(constrs_interval(constrs, k));
1966 }
1967
1968 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1969 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1970 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1971 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1972 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1973
1974 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1975 snd_pcm_hw_rule_format, NULL,
1976 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1977 if (err < 0)
1978 return err;
1979 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1980 snd_pcm_hw_rule_sample_bits, NULL,
1981 SNDRV_PCM_HW_PARAM_FORMAT,
1982 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1983 if (err < 0)
1984 return err;
1985 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1986 snd_pcm_hw_rule_div, NULL,
1987 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1988 if (err < 0)
1989 return err;
1990 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1991 snd_pcm_hw_rule_mul, NULL,
1992 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1993 if (err < 0)
1994 return err;
1995 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1996 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1997 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1998 if (err < 0)
1999 return err;
2000 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2001 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2002 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2003 if (err < 0)
2004 return err;
2005 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2006 snd_pcm_hw_rule_div, NULL,
2007 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2008 if (err < 0)
2009 return err;
2010 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2011 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2012 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2013 if (err < 0)
2014 return err;
2015 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2016 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2017 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2018 if (err < 0)
2019 return err;
2020 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2021 snd_pcm_hw_rule_div, NULL,
2022 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2023 if (err < 0)
2024 return err;
2025 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2026 snd_pcm_hw_rule_div, NULL,
2027 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2028 if (err < 0)
2029 return err;
2030 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2031 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2032 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2033 if (err < 0)
2034 return err;
2035 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2036 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2037 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2038 if (err < 0)
2039 return err;
2040 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2041 snd_pcm_hw_rule_mul, NULL,
2042 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2043 if (err < 0)
2044 return err;
2045 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2046 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2047 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2048 if (err < 0)
2049 return err;
2050 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2051 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2052 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2053 if (err < 0)
2054 return err;
2055 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2056 snd_pcm_hw_rule_muldivk, (void*) 8,
2057 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2058 if (err < 0)
2059 return err;
2060 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2061 snd_pcm_hw_rule_muldivk, (void*) 8,
2062 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2063 if (err < 0)
2064 return err;
2065 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2066 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2067 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2068 if (err < 0)
2069 return err;
2070 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2071 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2072 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2073 if (err < 0)
2074 return err;
2075 return 0;
2076}
2077
877211f5 2078int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 2079{
877211f5
TI		 2080 struct snd_pcm_runtime *runtime = substream->runtime;
2081 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 2082 int err;
2083 unsigned int mask = 0;
2084
2085 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2086 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2087 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2088 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
63825f3a 2089 if (hw_support_mmap(substream)) {
1da177e4
LT		 2090 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2091 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2092 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2093 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2094 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2095 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2096 }
2097 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 2098 if (err < 0)
2099 return err;
1da177e4
LT		 2100
2101 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 2102 if (err < 0)
2103 return err;
1da177e4
LT		 2104
2105 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 2106 if (err < 0)
2107 return err;
1da177e4
LT		 2108
2109 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2110 hw->channels_min, hw->channels_max);
7eaa943c
TI		 2111 if (err < 0)
2112 return err;
1da177e4
LT		 2113
2114 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2115 hw->rate_min, hw->rate_max);
8b90ca08
GL		 2116 if (err < 0)
2117 return err;
1da177e4
LT		 2118
2119 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2120 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 2121 if (err < 0)
2122 return err;
1da177e4
LT		 2123
2124 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2125 hw->periods_min, hw->periods_max);
7eaa943c
TI		 2126 if (err < 0)
2127 return err;
1da177e4
LT		 2128
2129 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2130 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 2131 if (err < 0)
2132 return err;
1da177e4
LT		 2133
2134 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2135 snd_pcm_hw_rule_buffer_bytes_max, substream,
2136 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2137 if (err < 0)
2138 return err;
2139
2140 /* FIXME: remove */
2141 if (runtime->dma_bytes) {
2142 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c 2143 if (err < 0)
6cf95152 2144 return err;
1da177e4
LT		 2145 }
2146
2147 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2148 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2149 snd_pcm_hw_rule_rate, hw,
2150 SNDRV_PCM_HW_PARAM_RATE, -1);
2151 if (err < 0)
2152 return err;
2153 }
2154
2155 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2156 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2157
2158 return 0;
2159}
2160
3bf75f9b 2161static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2162{
1da177e4 2163 snd_pcm_unlink(substream);
3bf75f9b
TI		 2164}
2165
2166void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2167{
0df63e44
TI		 2168 substream->ref_count--;
2169 if (substream->ref_count > 0)
2170 return;
2171
3bf75f9b 2172 snd_pcm_drop(substream);
3bf75f9b 2173 if (substream->hw_opened) {
1da177e4
LT		 2174 if (substream->ops->hw_free != NULL)
2175 substream->ops->hw_free(substream);
2176 substream->ops->close(substream);
3bf75f9b 2177 substream->hw_opened = 0;
1da177e4 2178 }
8699a0b6
TI		 2179 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2180 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2181 if (substream->pcm_release) {
2182 substream->pcm_release(substream);
2183 substream->pcm_release = NULL;
2184 }
3bf75f9b
TI		 2185 snd_pcm_detach_substream(substream);
2186}
2187
e88e8ae6
TI		 2188EXPORT_SYMBOL(snd_pcm_release_substream);
2189
3bf75f9b
TI		 2190int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2191 struct file *file,
2192 struct snd_pcm_substream **rsubstream)
2193{
2194 struct snd_pcm_substream *substream;
2195 int err;
2196
2197 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2198 if (err < 0)
2199 return err;
0df63e44
TI		 2200 if (substream->ref_count > 1) {
2201 *rsubstream = substream;
2202 return 0;
2203 }
2204
3bf75f9b
TI		 2205 err = snd_pcm_hw_constraints_init(substream);
2206 if (err < 0) {
09e56df8 2207 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
3bf75f9b
TI		 2208 goto error;
2209 }
2210
2211 if ((err = substream->ops->open(substream)) < 0)
2212 goto error;
2213
2214 substream->hw_opened = 1;
2215
2216 err = snd_pcm_hw_constraints_complete(substream);
2217 if (err < 0) {
09e56df8 2218 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
3bf75f9b
TI		 2219 goto error;
2220 }
2221
2222 *rsubstream = substream;
1da177e4 2223 return 0;
3bf75f9b
TI		 2224
2225 error:
2226 snd_pcm_release_substream(substream);
2227 return err;
1da177e4
LT		 2228}
2229
e88e8ae6
TI		 2230EXPORT_SYMBOL(snd_pcm_open_substream);
2231
1da177e4 2232static int snd_pcm_open_file(struct file *file,
877211f5 2233 struct snd_pcm *pcm,
ffd3d5c6 2234 int stream)
1da177e4 2235{
877211f5
TI		 2236 struct snd_pcm_file *pcm_file;
2237 struct snd_pcm_substream *substream;
3bf75f9b 2238 int err;
1da177e4 2239
3bf75f9b
TI		 2240 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2241 if (err < 0)
2242 return err;
2243
548a648b
TI		 2244 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2245 if (pcm_file == NULL) {
2246 snd_pcm_release_substream(substream);
2247 return -ENOMEM;
2248 }
2249 pcm_file->substream = substream;
2250 if (substream->ref_count == 1) {
0df63e44
TI		 2251 substream->file = pcm_file;
2252 substream->pcm_release = pcm_release_private;
1da177e4 2253 }
1da177e4 2254 file->private_data = pcm_file;
ffd3d5c6 2255
1da177e4
LT		 2256 return 0;
2257}
2258
f87135f5
CL		 2259static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2260{
2261 struct snd_pcm *pcm;
02f4865f
TI		 2262 int err = nonseekable_open(inode, file);
2263 if (err < 0)
2264 return err;
f87135f5
CL		 2265 pcm = snd_lookup_minor_data(iminor(inode),
2266 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd 2267 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
8bb4d9ce
TI		 2268 if (pcm)
2269 snd_card_unref(pcm->card);
a0830dbd 2270 return err;
f87135f5
CL		 2271}
2272
2273static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2274{
877211f5 2275 struct snd_pcm *pcm;
02f4865f
TI		 2276 int err = nonseekable_open(inode, file);
2277 if (err < 0)
2278 return err;
f87135f5
CL		 2279 pcm = snd_lookup_minor_data(iminor(inode),
2280 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd 2281 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
8bb4d9ce
TI		 2282 if (pcm)
2283 snd_card_unref(pcm->card);
a0830dbd 2284 return err;
f87135f5
CL		 2285}
2286
2287static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2288{
2289 int err;
1da177e4
LT		 2290 wait_queue_t wait;
2291
1da177e4
LT		 2292 if (pcm == NULL) {
2293 err = -ENODEV;
2294 goto __error1;
2295 }
2296 err = snd_card_file_add(pcm->card, file);
2297 if (err < 0)
2298 goto __error1;
2299 if (!try_module_get(pcm->card->module)) {
2300 err = -EFAULT;
2301 goto __error2;
2302 }
2303 init_waitqueue_entry(&wait, current);
2304 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2305 mutex_lock(&pcm->open_mutex);
1da177e4 2306 while (1) {
ffd3d5c6 2307 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2308 if (err >= 0)
2309 break;
2310 if (err == -EAGAIN) {
2311 if (file->f_flags & O_NONBLOCK) {
2312 err = -EBUSY;
2313 break;
2314 }
2315 } else
2316 break;
2317 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2318 mutex_unlock(&pcm->open_mutex);
1da177e4 2319 schedule();
1a60d4c5 2320 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2321 if (pcm->card->shutdown) {
2322 err = -ENODEV;
2323 break;
2324 }
1da177e4
LT		 2325 if (signal_pending(current)) {
2326 err = -ERESTARTSYS;
2327 break;
2328 }
2329 }
2330 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2331 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2332 if (err < 0)
2333 goto __error;
2334 return err;
2335
2336 __error:
2337 module_put(pcm->card->module);
2338 __error2:
2339 snd_card_file_remove(pcm->card, file);
2340 __error1:
2341 return err;
2342}
2343
2344static int snd_pcm_release(struct inode *inode, struct file *file)
2345{
877211f5
TI		 2346 struct snd_pcm *pcm;
2347 struct snd_pcm_substream *substream;
2348 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2349
2350 pcm_file = file->private_data;
2351 substream = pcm_file->substream;
7eaa943c
TI		 2352 if (snd_BUG_ON(!substream))
2353 return -ENXIO;
1da177e4 2354 pcm = substream->pcm;
1a60d4c5 2355 mutex_lock(&pcm->open_mutex);
3bf75f9b 2356 snd_pcm_release_substream(substream);
548a648b 2357 kfree(pcm_file);
1a60d4c5 2358 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2359 wake_up(&pcm->open_wait);
2360 module_put(pcm->card->module);
2361 snd_card_file_remove(pcm->card, file);
2362 return 0;
2363}
2364
877211f5
TI		 2365static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2366 snd_pcm_uframes_t frames)
1da177e4 2367{
877211f5 2368 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2369 snd_pcm_sframes_t appl_ptr;
2370 snd_pcm_sframes_t ret;
2371 snd_pcm_sframes_t hw_avail;
2372
2373 if (frames == 0)
2374 return 0;
2375
2376 snd_pcm_stream_lock_irq(substream);
2377 switch (runtime->status->state) {
2378 case SNDRV_PCM_STATE_PREPARED:
2379 break;
2380 case SNDRV_PCM_STATE_DRAINING:
2381 case SNDRV_PCM_STATE_RUNNING:
2382 if (snd_pcm_update_hw_ptr(substream) >= 0)
2383 break;
2384 /* Fall through */
2385 case SNDRV_PCM_STATE_XRUN:
2386 ret = -EPIPE;
2387 goto __end;
51840409
LR		 2388 case SNDRV_PCM_STATE_SUSPENDED:
2389 ret = -ESTRPIPE;
2390 goto __end;
1da177e4
LT		 2391 default:
2392 ret = -EBADFD;
2393 goto __end;
2394 }
2395
2396 hw_avail = snd_pcm_playback_hw_avail(runtime);
2397 if (hw_avail <= 0) {
2398 ret = 0;
2399 goto __end;
2400 }
2401 if (frames > (snd_pcm_uframes_t)hw_avail)
2402 frames = hw_avail;
1da177e4
LT		 2403 appl_ptr = runtime->control->appl_ptr - frames;
2404 if (appl_ptr < 0)
2405 appl_ptr += runtime->boundary;
2406 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2407 ret = frames;
2408 __end:
2409 snd_pcm_stream_unlock_irq(substream);
2410 return ret;
2411}
2412
877211f5
TI		 2413static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2414 snd_pcm_uframes_t frames)
1da177e4 2415{
877211f5 2416 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2417 snd_pcm_sframes_t appl_ptr;
2418 snd_pcm_sframes_t ret;
2419 snd_pcm_sframes_t hw_avail;
2420
2421 if (frames == 0)
2422 return 0;
2423
2424 snd_pcm_stream_lock_irq(substream);
2425 switch (runtime->status->state) {
2426 case SNDRV_PCM_STATE_PREPARED:
2427 case SNDRV_PCM_STATE_DRAINING:
2428 break;
2429 case SNDRV_PCM_STATE_RUNNING:
2430 if (snd_pcm_update_hw_ptr(substream) >= 0)
2431 break;
2432 /* Fall through */
2433 case SNDRV_PCM_STATE_XRUN:
2434 ret = -EPIPE;
2435 goto __end;
51840409
LR		 2436 case SNDRV_PCM_STATE_SUSPENDED:
2437 ret = -ESTRPIPE;
2438 goto __end;
1da177e4
LT		 2439 default:
2440 ret = -EBADFD;
2441 goto __end;
2442 }
2443
2444 hw_avail = snd_pcm_capture_hw_avail(runtime);
2445 if (hw_avail <= 0) {
2446 ret = 0;
2447 goto __end;
2448 }
2449 if (frames > (snd_pcm_uframes_t)hw_avail)
2450 frames = hw_avail;
1da177e4
LT		 2451 appl_ptr = runtime->control->appl_ptr - frames;
2452 if (appl_ptr < 0)
2453 appl_ptr += runtime->boundary;
2454 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2455 ret = frames;
2456 __end:
2457 snd_pcm_stream_unlock_irq(substream);
2458 return ret;
2459}
2460
877211f5
TI		 2461static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2462 snd_pcm_uframes_t frames)
1da177e4 2463{
877211f5 2464 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2465 snd_pcm_sframes_t appl_ptr;
2466 snd_pcm_sframes_t ret;
2467 snd_pcm_sframes_t avail;
2468
2469 if (frames == 0)
2470 return 0;
2471
2472 snd_pcm_stream_lock_irq(substream);
2473 switch (runtime->status->state) {
2474 case SNDRV_PCM_STATE_PREPARED:
2475 case SNDRV_PCM_STATE_PAUSED:
2476 break;
2477 case SNDRV_PCM_STATE_DRAINING:
2478 case SNDRV_PCM_STATE_RUNNING:
2479 if (snd_pcm_update_hw_ptr(substream) >= 0)
2480 break;
2481 /* Fall through */
2482 case SNDRV_PCM_STATE_XRUN:
2483 ret = -EPIPE;
2484 goto __end;
51840409
LR		 2485 case SNDRV_PCM_STATE_SUSPENDED:
2486 ret = -ESTRPIPE;
2487 goto __end;
1da177e4
LT		 2488 default:
2489 ret = -EBADFD;
2490 goto __end;
2491 }
2492
2493 avail = snd_pcm_playback_avail(runtime);
2494 if (avail <= 0) {
2495 ret = 0;
2496 goto __end;
2497 }
2498 if (frames > (snd_pcm_uframes_t)avail)
2499 frames = avail;
1da177e4
LT		 2500 appl_ptr = runtime->control->appl_ptr + frames;
2501 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2502 appl_ptr -= runtime->boundary;
2503 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2504 ret = frames;
2505 __end:
2506 snd_pcm_stream_unlock_irq(substream);
2507 return ret;
2508}
2509
877211f5
TI		 2510static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2511 snd_pcm_uframes_t frames)
1da177e4 2512{
877211f5 2513 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2514 snd_pcm_sframes_t appl_ptr;
2515 snd_pcm_sframes_t ret;
2516 snd_pcm_sframes_t avail;
2517
2518 if (frames == 0)
2519 return 0;
2520
2521 snd_pcm_stream_lock_irq(substream);
2522 switch (runtime->status->state) {
2523 case SNDRV_PCM_STATE_PREPARED:
2524 case SNDRV_PCM_STATE_DRAINING:
2525 case SNDRV_PCM_STATE_PAUSED:
2526 break;
2527 case SNDRV_PCM_STATE_RUNNING:
2528 if (snd_pcm_update_hw_ptr(substream) >= 0)
2529 break;
2530 /* Fall through */
2531 case SNDRV_PCM_STATE_XRUN:
2532 ret = -EPIPE;
2533 goto __end;
51840409
LR		 2534 case SNDRV_PCM_STATE_SUSPENDED:
2535 ret = -ESTRPIPE;
2536 goto __end;
1da177e4
LT		 2537 default:
2538 ret = -EBADFD;
2539 goto __end;
2540 }
2541
2542 avail = snd_pcm_capture_avail(runtime);
2543 if (avail <= 0) {
2544 ret = 0;
2545 goto __end;
2546 }
2547 if (frames > (snd_pcm_uframes_t)avail)
2548 frames = avail;
1da177e4
LT		 2549 appl_ptr = runtime->control->appl_ptr + frames;
2550 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2551 appl_ptr -= runtime->boundary;
2552 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2553 ret = frames;
2554 __end:
2555 snd_pcm_stream_unlock_irq(substream);
2556 return ret;
2557}
2558
877211f5 2559static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2560{
877211f5 2561 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2562 int err;
2563
2564 snd_pcm_stream_lock_irq(substream);
2565 switch (runtime->status->state) {
2566 case SNDRV_PCM_STATE_DRAINING:
2567 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2568 goto __badfd;
1f96153b 2569 /* Fall through */
1da177e4
LT		 2570 case SNDRV_PCM_STATE_RUNNING:
2571 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2572 break;
2573 /* Fall through */
2574 case SNDRV_PCM_STATE_PREPARED:
2575 case SNDRV_PCM_STATE_SUSPENDED:
2576 err = 0;
2577 break;
2578 case SNDRV_PCM_STATE_XRUN:
2579 err = -EPIPE;
2580 break;
2581 default:
2582 __badfd:
2583 err = -EBADFD;
2584 break;
2585 }
2586 snd_pcm_stream_unlock_irq(substream);
2587 return err;
2588}
2589
877211f5
TI		 2590static int snd_pcm_delay(struct snd_pcm_substream *substream,
2591 snd_pcm_sframes_t __user *res)
1da177e4 2592{
877211f5 2593 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2594 int err;
2595 snd_pcm_sframes_t n = 0;
2596
2597 snd_pcm_stream_lock_irq(substream);
2598 switch (runtime->status->state) {
2599 case SNDRV_PCM_STATE_DRAINING:
2600 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2601 goto __badfd;
1f96153b 2602 /* Fall through */
1da177e4
LT		 2603 case SNDRV_PCM_STATE_RUNNING:
2604 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2605 break;
2606 /* Fall through */
2607 case SNDRV_PCM_STATE_PREPARED:
2608 case SNDRV_PCM_STATE_SUSPENDED:
2609 err = 0;
2610 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2611 n = snd_pcm_playback_hw_avail(runtime);
2612 else
2613 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2614 n += runtime->delay;
1da177e4
LT		 2615 break;
2616 case SNDRV_PCM_STATE_XRUN:
2617 err = -EPIPE;
2618 break;
2619 default:
2620 __badfd:
2621 err = -EBADFD;
2622 break;
2623 }
2624 snd_pcm_stream_unlock_irq(substream);
2625 if (!err)
2626 if (put_user(n, res))
2627 err = -EFAULT;
2628 return err;
2629}
2630
877211f5
TI		 2631static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2632 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2633{
877211f5
TI		 2634 struct snd_pcm_runtime *runtime = substream->runtime;
2635 struct snd_pcm_sync_ptr sync_ptr;
2636 volatile struct snd_pcm_mmap_status *status;
2637 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2638 int err;
2639
2640 memset(&sync_ptr, 0, sizeof(sync_ptr));
2641 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2642 return -EFAULT;
877211f5 2643 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2644 return -EFAULT;
2645 status = runtime->status;
2646 control = runtime->control;
2647 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2648 err = snd_pcm_hwsync(substream);
2649 if (err < 0)
2650 return err;
2651 }
2652 snd_pcm_stream_lock_irq(substream);
2653 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2654 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2655 else
2656 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2657 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2658 control->avail_min = sync_ptr.c.control.avail_min;
2659 else
2660 sync_ptr.c.control.avail_min = control->avail_min;
2661 sync_ptr.s.status.state = status->state;
2662 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2663 sync_ptr.s.status.tstamp = status->tstamp;
2664 sync_ptr.s.status.suspended_state = status->suspended_state;
2665 snd_pcm_stream_unlock_irq(substream);
2666 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2667 return -EFAULT;
2668 return 0;
2669}
b751eef1
JK		 2670
2671static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2672{
2673 struct snd_pcm_runtime *runtime = substream->runtime;
2674 int arg;
2675
2676 if (get_user(arg, _arg))
2677 return -EFAULT;
2678 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2679 return -EINVAL;
2408c219 2680 runtime->tstamp_type = arg;
b751eef1
JK		 2681 return 0;
2682}
1da177e4 2683
0df63e44
TI		 2684static int snd_pcm_common_ioctl1(struct file *file,
2685 struct snd_pcm_substream *substream,
1da177e4
LT		 2686 unsigned int cmd, void __user *arg)
2687{
1da177e4
LT		 2688 switch (cmd) {
2689 case SNDRV_PCM_IOCTL_PVERSION:
2690 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2691 case SNDRV_PCM_IOCTL_INFO:
2692 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2693 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2694 return 0;
b751eef1
JK		 2695 case SNDRV_PCM_IOCTL_TTSTAMP:
2696 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2697 case SNDRV_PCM_IOCTL_HW_REFINE:
2698 return snd_pcm_hw_refine_user(substream, arg);
2699 case SNDRV_PCM_IOCTL_HW_PARAMS:
2700 return snd_pcm_hw_params_user(substream, arg);
2701 case SNDRV_PCM_IOCTL_HW_FREE:
2702 return snd_pcm_hw_free(substream);
2703 case SNDRV_PCM_IOCTL_SW_PARAMS:
2704 return snd_pcm_sw_params_user(substream, arg);
2705 case SNDRV_PCM_IOCTL_STATUS:
2706 return snd_pcm_status_user(substream, arg);
2707 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2708 return snd_pcm_channel_info_user(substream, arg);
2709 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2710 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2711 case SNDRV_PCM_IOCTL_RESET:
2712 return snd_pcm_reset(substream);
2713 case SNDRV_PCM_IOCTL_START:
2714 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2715 case SNDRV_PCM_IOCTL_LINK:
2716 return snd_pcm_link(substream, (int)(unsigned long) arg);
2717 case SNDRV_PCM_IOCTL_UNLINK:
2718 return snd_pcm_unlink(substream);
2719 case SNDRV_PCM_IOCTL_RESUME:
2720 return snd_pcm_resume(substream);
2721 case SNDRV_PCM_IOCTL_XRUN:
2722 return snd_pcm_xrun(substream);
2723 case SNDRV_PCM_IOCTL_HWSYNC:
2724 return snd_pcm_hwsync(substream);
2725 case SNDRV_PCM_IOCTL_DELAY:
2726 return snd_pcm_delay(substream, arg);
2727 case SNDRV_PCM_IOCTL_SYNC_PTR:
2728 return snd_pcm_sync_ptr(substream, arg);
59d48582 2729#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2730 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2731 return snd_pcm_hw_refine_old_user(substream, arg);
2732 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2733 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2734#endif
1da177e4 2735 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2736 return snd_pcm_drain(substream, file);
1da177e4
LT		 2737 case SNDRV_PCM_IOCTL_DROP:
2738 return snd_pcm_drop(substream);
e661d0dd
TI		 2739 case SNDRV_PCM_IOCTL_PAUSE:
2740 {
2741 int res;
2742 snd_pcm_stream_lock_irq(substream);
2743 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2744 snd_pcm_stream_unlock_irq(substream);
2745 return res;
2746 }
1da177e4 2747 }
09e56df8 2748 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
1da177e4
LT		 2749 return -ENOTTY;
2750}
2751
0df63e44
TI		 2752static int snd_pcm_playback_ioctl1(struct file *file,
2753 struct snd_pcm_substream *substream,
1da177e4
LT		 2754 unsigned int cmd, void __user *arg)
2755{
7eaa943c
TI		 2756 if (snd_BUG_ON(!substream))
2757 return -ENXIO;
2758 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2759 return -EINVAL;
1da177e4
LT		 2760 switch (cmd) {
2761 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2762 {
877211f5
TI		 2763 struct snd_xferi xferi;
2764 struct snd_xferi __user *_xferi = arg;
2765 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2766 snd_pcm_sframes_t result;
2767 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2768 return -EBADFD;
2769 if (put_user(0, &_xferi->result))
2770 return -EFAULT;
2771 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2772 return -EFAULT;
2773 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2774 __put_user(result, &_xferi->result);
2775 return result < 0 ? result : 0;
2776 }
2777 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2778 {
877211f5
TI		 2779 struct snd_xfern xfern;
2780 struct snd_xfern __user *_xfern = arg;
2781 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2782 void __user **bufs;
2783 snd_pcm_sframes_t result;
2784 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2785 return -EBADFD;
2786 if (runtime->channels > 128)
2787 return -EINVAL;
2788 if (put_user(0, &_xfern->result))
2789 return -EFAULT;
2790 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2791 return -EFAULT;
ef44a1ec
LZ		 2792
2793 bufs = memdup_user(xfern.bufs,
2794 sizeof(void *) * runtime->channels);
2795 if (IS_ERR(bufs))
2796 return PTR_ERR(bufs);
1da177e4
LT		 2797 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2798 kfree(bufs);
2799 __put_user(result, &_xfern->result);
2800 return result < 0 ? result : 0;
2801 }
2802 case SNDRV_PCM_IOCTL_REWIND:
2803 {
2804 snd_pcm_uframes_t frames;
2805 snd_pcm_uframes_t __user *_frames = arg;
2806 snd_pcm_sframes_t result;
2807 if (get_user(frames, _frames))
2808 return -EFAULT;
2809 if (put_user(0, _frames))
2810 return -EFAULT;
2811 result = snd_pcm_playback_rewind(substream, frames);
2812 __put_user(result, _frames);
2813 return result < 0 ? result : 0;
2814 }
2815 case SNDRV_PCM_IOCTL_FORWARD:
2816 {
2817 snd_pcm_uframes_t frames;
2818 snd_pcm_uframes_t __user *_frames = arg;
2819 snd_pcm_sframes_t result;
2820 if (get_user(frames, _frames))
2821 return -EFAULT;
2822 if (put_user(0, _frames))
2823 return -EFAULT;
2824 result = snd_pcm_playback_forward(substream, frames);
2825 __put_user(result, _frames);
2826 return result < 0 ? result : 0;
2827 }
1da177e4 2828 }
0df63e44 2829 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2830}
2831
0df63e44
TI		 2832static int snd_pcm_capture_ioctl1(struct file *file,
2833 struct snd_pcm_substream *substream,
1da177e4
LT		 2834 unsigned int cmd, void __user *arg)
2835{
7eaa943c
TI		 2836 if (snd_BUG_ON(!substream))
2837 return -ENXIO;
2838 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2839 return -EINVAL;
1da177e4
LT		 2840 switch (cmd) {
2841 case SNDRV_PCM_IOCTL_READI_FRAMES:
2842 {
877211f5
TI		 2843 struct snd_xferi xferi;
2844 struct snd_xferi __user *_xferi = arg;
2845 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2846 snd_pcm_sframes_t result;
2847 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2848 return -EBADFD;
2849 if (put_user(0, &_xferi->result))
2850 return -EFAULT;
2851 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2852 return -EFAULT;
2853 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2854 __put_user(result, &_xferi->result);
2855 return result < 0 ? result : 0;
2856 }
2857 case SNDRV_PCM_IOCTL_READN_FRAMES:
2858 {
877211f5
TI		 2859 struct snd_xfern xfern;
2860 struct snd_xfern __user *_xfern = arg;
2861 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2862 void *bufs;
2863 snd_pcm_sframes_t result;
2864 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2865 return -EBADFD;
2866 if (runtime->channels > 128)
2867 return -EINVAL;
2868 if (put_user(0, &_xfern->result))
2869 return -EFAULT;
2870 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2871 return -EFAULT;
ef44a1ec
LZ		 2872
2873 bufs = memdup_user(xfern.bufs,
2874 sizeof(void *) * runtime->channels);
2875 if (IS_ERR(bufs))
2876 return PTR_ERR(bufs);
1da177e4
LT		 2877 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2878 kfree(bufs);
2879 __put_user(result, &_xfern->result);
2880 return result < 0 ? result : 0;
2881 }
2882 case SNDRV_PCM_IOCTL_REWIND:
2883 {
2884 snd_pcm_uframes_t frames;
2885 snd_pcm_uframes_t __user *_frames = arg;
2886 snd_pcm_sframes_t result;
2887 if (get_user(frames, _frames))
2888 return -EFAULT;
2889 if (put_user(0, _frames))
2890 return -EFAULT;
2891 result = snd_pcm_capture_rewind(substream, frames);
2892 __put_user(result, _frames);
2893 return result < 0 ? result : 0;
2894 }
2895 case SNDRV_PCM_IOCTL_FORWARD:
2896 {
2897 snd_pcm_uframes_t frames;
2898 snd_pcm_uframes_t __user *_frames = arg;
2899 snd_pcm_sframes_t result;
2900 if (get_user(frames, _frames))
2901 return -EFAULT;
2902 if (put_user(0, _frames))
2903 return -EFAULT;
2904 result = snd_pcm_capture_forward(substream, frames);
2905 __put_user(result, _frames);
2906 return result < 0 ? result : 0;
2907 }
2908 }
0df63e44 2909 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2910}
2911
877211f5
TI		 2912static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2913 unsigned long arg)
1da177e4 2914{
877211f5 2915 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2916
2917 pcm_file = file->private_data;
2918
2919 if (((cmd >> 8) & 0xff) != 'A')
2920 return -ENOTTY;
2921
0df63e44
TI		 2922 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2923 (void __user *)arg);
1da177e4
LT		 2924}
2925
877211f5
TI		 2926static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2927 unsigned long arg)
1da177e4 2928{
877211f5 2929 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2930
2931 pcm_file = file->private_data;
2932
2933 if (((cmd >> 8) & 0xff) != 'A')
2934 return -ENOTTY;
2935
0df63e44
TI		 2936 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2937 (void __user *)arg);
1da177e4
LT		 2938}
2939
bf1bbb5a
TI		 2940int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2941 unsigned int cmd, void *arg)
1da177e4
LT		 2942{
2943 mm_segment_t fs;
2944 int result;
2945
2946 fs = snd_enter_user();
1da177e4
LT		 2947 switch (substream->stream) {
2948 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2949 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2950 (void __user *)arg);
bf1bbb5a 2951 break;
1da177e4 2952 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2953 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2954 (void __user *)arg);
bf1bbb5a 2955 break;
1da177e4 2956 default:
bf1bbb5a
TI		 2957 result = -EINVAL;
2958 break;
1da177e4 2959 }
bf1bbb5a
TI		 2960 snd_leave_user(fs);
2961 return result;
1da177e4
LT		 2962}
2963
e88e8ae6
TI		 2964EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2965
877211f5
TI		 2966static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2967 loff_t * offset)
1da177e4 2968{
877211f5
TI		 2969 struct snd_pcm_file *pcm_file;
2970 struct snd_pcm_substream *substream;
2971 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2972 snd_pcm_sframes_t result;
2973
2974 pcm_file = file->private_data;
2975 substream = pcm_file->substream;
7eaa943c
TI		 2976 if (PCM_RUNTIME_CHECK(substream))
2977 return -ENXIO;
1da177e4
LT		 2978 runtime = substream->runtime;
2979 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2980 return -EBADFD;
2981 if (!frame_aligned(runtime, count))
2982 return -EINVAL;
2983 count = bytes_to_frames(runtime, count);
2984 result = snd_pcm_lib_read(substream, buf, count);
2985 if (result > 0)
2986 result = frames_to_bytes(runtime, result);
2987 return result;
2988}
2989
877211f5
TI		 2990static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2991 size_t count, loff_t * offset)
1da177e4 2992{
877211f5
TI		 2993 struct snd_pcm_file *pcm_file;
2994 struct snd_pcm_substream *substream;
2995 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2996 snd_pcm_sframes_t result;
2997
2998 pcm_file = file->private_data;
2999 substream = pcm_file->substream;
7eaa943c
TI		 3000 if (PCM_RUNTIME_CHECK(substream))
3001 return -ENXIO;
1da177e4 3002 runtime = substream->runtime;
7eaa943c
TI		 3003 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3004 return -EBADFD;
3005 if (!frame_aligned(runtime, count))
3006 return -EINVAL;
1da177e4
LT		 3007 count = bytes_to_frames(runtime, count);
3008 result = snd_pcm_lib_write(substream, buf, count);
3009 if (result > 0)
3010 result = frames_to_bytes(runtime, result);
1da177e4
LT		 3011 return result;
3012}
3013
ee0b3e67
BP		 3014static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
3015 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 3016
3017{
877211f5
TI		 3018 struct snd_pcm_file *pcm_file;
3019 struct snd_pcm_substream *substream;
3020 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3021 snd_pcm_sframes_t result;
3022 unsigned long i;
3023 void __user **bufs;
3024 snd_pcm_uframes_t frames;
3025
ee0b3e67 3026 pcm_file = iocb->ki_filp->private_data;
1da177e4 3027 substream = pcm_file->substream;
7eaa943c
TI		 3028 if (PCM_RUNTIME_CHECK(substream))
3029 return -ENXIO;
1da177e4
LT		 3030 runtime = substream->runtime;
3031 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3032 return -EBADFD;
ee0b3e67 3033 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 3034 return -EINVAL;
ee0b3e67 3035 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 3036 return -EINVAL;
ee0b3e67
BP		 3037 frames = bytes_to_samples(runtime, iov->iov_len);
3038 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 3039 if (bufs == NULL)
3040 return -ENOMEM;
ee0b3e67
BP		 3041 for (i = 0; i < nr_segs; ++i)
3042 bufs[i] = iov[i].iov_base;
1da177e4
LT		 3043 result = snd_pcm_lib_readv(substream, bufs, frames);
3044 if (result > 0)
3045 result = frames_to_bytes(runtime, result);
3046 kfree(bufs);
3047 return result;
3048}
3049
ee0b3e67
BP		 3050static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
3051 unsigned long nr_segs, loff_t pos)
1da177e4 3052{
877211f5
TI		 3053 struct snd_pcm_file *pcm_file;
3054 struct snd_pcm_substream *substream;
3055 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3056 snd_pcm_sframes_t result;
3057 unsigned long i;
3058 void __user **bufs;
3059 snd_pcm_uframes_t frames;
3060
ee0b3e67 3061 pcm_file = iocb->ki_filp->private_data;
1da177e4 3062 substream = pcm_file->substream;
7eaa943c
TI		 3063 if (PCM_RUNTIME_CHECK(substream))
3064 return -ENXIO;
1da177e4 3065 runtime = substream->runtime;
7eaa943c
TI		 3066 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3067 return -EBADFD;
ee0b3e67 3068 if (nr_segs > 128 || nr_segs != runtime->channels ||
7eaa943c
TI		 3069 !frame_aligned(runtime, iov->iov_len))
3070 return -EINVAL;
ee0b3e67
BP		 3071 frames = bytes_to_samples(runtime, iov->iov_len);
3072 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 3073 if (bufs == NULL)
3074 return -ENOMEM;
ee0b3e67
BP		 3075 for (i = 0; i < nr_segs; ++i)
3076 bufs[i] = iov[i].iov_base;
1da177e4
LT		 3077 result = snd_pcm_lib_writev(substream, bufs, frames);
3078 if (result > 0)
3079 result = frames_to_bytes(runtime, result);
3080 kfree(bufs);
1da177e4
LT		 3081 return result;
3082}
3083
3084static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
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 unsigned int mask;
3090 snd_pcm_uframes_t avail;
3091
3092 pcm_file = file->private_data;
3093
3094 substream = pcm_file->substream;
7eaa943c
TI		 3095 if (PCM_RUNTIME_CHECK(substream))
3096 return -ENXIO;
1da177e4
LT		 3097 runtime = substream->runtime;
3098
3099 poll_wait(file, &runtime->sleep, wait);
3100
3101 snd_pcm_stream_lock_irq(substream);
3102 avail = snd_pcm_playback_avail(runtime);
3103 switch (runtime->status->state) {
3104 case SNDRV_PCM_STATE_RUNNING:
3105 case SNDRV_PCM_STATE_PREPARED:
3106 case SNDRV_PCM_STATE_PAUSED:
3107 if (avail >= runtime->control->avail_min) {
3108 mask = POLLOUT | POLLWRNORM;
3109 break;
3110 }
3111 /* Fall through */
3112 case SNDRV_PCM_STATE_DRAINING:
3113 mask = 0;
3114 break;
3115 default:
3116 mask = POLLOUT | POLLWRNORM | POLLERR;
3117 break;
3118 }
3119 snd_pcm_stream_unlock_irq(substream);
3120 return mask;
3121}
3122
3123static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3124{
877211f5
TI		 3125 struct snd_pcm_file *pcm_file;
3126 struct snd_pcm_substream *substream;
3127 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3128 unsigned int mask;
3129 snd_pcm_uframes_t avail;
3130
3131 pcm_file = file->private_data;
3132
3133 substream = pcm_file->substream;
7eaa943c
TI		 3134 if (PCM_RUNTIME_CHECK(substream))
3135 return -ENXIO;
1da177e4
LT		 3136 runtime = substream->runtime;
3137
3138 poll_wait(file, &runtime->sleep, wait);
3139
3140 snd_pcm_stream_lock_irq(substream);
3141 avail = snd_pcm_capture_avail(runtime);
3142 switch (runtime->status->state) {
3143 case SNDRV_PCM_STATE_RUNNING:
3144 case SNDRV_PCM_STATE_PREPARED:
3145 case SNDRV_PCM_STATE_PAUSED:
3146 if (avail >= runtime->control->avail_min) {
3147 mask = POLLIN | POLLRDNORM;
3148 break;
3149 }
3150 mask = 0;
3151 break;
3152 case SNDRV_PCM_STATE_DRAINING:
3153 if (avail > 0) {
3154 mask = POLLIN | POLLRDNORM;
3155 break;
3156 }
3157 /* Fall through */
3158 default:
3159 mask = POLLIN | POLLRDNORM | POLLERR;
3160 break;
3161 }
3162 snd_pcm_stream_unlock_irq(substream);
3163 return mask;
3164}
3165
3166/*
3167 * mmap support
3168 */
3169
3170/*
3171 * Only on coherent architectures, we can mmap the status and the control records
3172 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3173 */
3174#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3175/*
3176 * mmap status record
3177 */
3ad5afcd
NP		 3178static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3179 struct vm_fault *vmf)
1da177e4 3180{
877211f5
TI		 3181 struct snd_pcm_substream *substream = area->vm_private_data;
3182 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3183
3184 if (substream == NULL)
3ad5afcd 3185 return VM_FAULT_SIGBUS;
1da177e4 3186 runtime = substream->runtime;
3ad5afcd
NP		 3187 vmf->page = virt_to_page(runtime->status);
3188 get_page(vmf->page);
3189 return 0;
1da177e4
LT		 3190}
3191
f0f37e2f 3192static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3193{
3ad5afcd 3194 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3195};
3196
877211f5 3197static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3198 struct vm_area_struct *area)
3199{
1da177e4
LT		 3200 long size;
3201 if (!(area->vm_flags & VM_READ))
3202 return -EINVAL;
1da177e4 3203 size = area->vm_end - area->vm_start;
877211f5 3204 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3205 return -EINVAL;
3206 area->vm_ops = &snd_pcm_vm_ops_status;
3207 area->vm_private_data = substream;
314e51b9 3208 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3209 return 0;
3210}
3211
3212/*
3213 * mmap control record
3214 */
3ad5afcd
NP		 3215static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3216 struct vm_fault *vmf)
1da177e4 3217{
877211f5
TI		 3218 struct snd_pcm_substream *substream = area->vm_private_data;
3219 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3220
3221 if (substream == NULL)
3ad5afcd 3222 return VM_FAULT_SIGBUS;
1da177e4 3223 runtime = substream->runtime;
3ad5afcd
NP		 3224 vmf->page = virt_to_page(runtime->control);
3225 get_page(vmf->page);
3226 return 0;
1da177e4
LT		 3227}
3228
f0f37e2f 3229static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3230{
3ad5afcd 3231 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3232};
3233
877211f5 3234static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3235 struct vm_area_struct *area)
3236{
1da177e4
LT		 3237 long size;
3238 if (!(area->vm_flags & VM_READ))
3239 return -EINVAL;
1da177e4 3240 size = area->vm_end - area->vm_start;
877211f5 3241 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3242 return -EINVAL;
3243 area->vm_ops = &snd_pcm_vm_ops_control;
3244 area->vm_private_data = substream;
314e51b9 3245 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3246 return 0;
3247}
3248#else /* ! coherent mmap */
3249/*
3250 * don't support mmap for status and control records.
3251 */
877211f5 3252static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3253 struct vm_area_struct *area)
3254{
3255 return -ENXIO;
3256}
877211f5 3257static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3258 struct vm_area_struct *area)
3259{
3260 return -ENXIO;
3261}
3262#endif /* coherent mmap */
3263
9eb4a067
TI		 3264static inline struct page *
3265snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3266{
3267 void *vaddr = substream->runtime->dma_area + ofs;
3268 return virt_to_page(vaddr);
3269}
3270
1da177e4 3271/*
3ad5afcd 3272 * fault callback for mmapping a RAM page
1da177e4 3273 */
3ad5afcd
NP		 3274static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3275 struct vm_fault *vmf)
1da177e4 3276{
877211f5
TI		 3277 struct snd_pcm_substream *substream = area->vm_private_data;
3278 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3279 unsigned long offset;
3280 struct page * page;
1da177e4
LT		 3281 size_t dma_bytes;
3282
3283 if (substream == NULL)
3ad5afcd 3284 return VM_FAULT_SIGBUS;
1da177e4 3285 runtime = substream->runtime;
3ad5afcd 3286 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3287 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3288 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3289 return VM_FAULT_SIGBUS;
9eb4a067 3290 if (substream->ops->page)
1da177e4 3291 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3292 else
3293 page = snd_pcm_default_page_ops(substream, offset);
3294 if (!page)
3295 return VM_FAULT_SIGBUS;
b5810039 3296 get_page(page);
3ad5afcd
NP		 3297 vmf->page = page;
3298 return 0;
1da177e4
LT		 3299}
3300
657b1989
TI		 3301static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3302 .open = snd_pcm_mmap_data_open,
3303 .close = snd_pcm_mmap_data_close,
3304};
3305
3306static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3307 .open = snd_pcm_mmap_data_open,
3308 .close = snd_pcm_mmap_data_close,
3ad5afcd 3309 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3310};
3311
3312/*
3313 * mmap the DMA buffer on RAM
3314 */
30b771cf
TI		 3315
3316/**
3317 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3318 * @substream: PCM substream
3319 * @area: VMA
3320 *
3321 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3322 * this function is invoked implicitly.
3323 */
18a2b962
TI		 3324int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3325 struct vm_area_struct *area)
1da177e4 3326{
314e51b9 3327 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
a5606f85 3328#ifdef CONFIG_GENERIC_ALLOCATOR
05503214
NC		 3329 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3330 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3331 return remap_pfn_range(area, area->vm_start,
3332 substream->dma_buffer.addr >> PAGE_SHIFT,
3333 area->vm_end - area->vm_start, area->vm_page_prot);
3334 }
a5606f85 3335#endif /* CONFIG_GENERIC_ALLOCATOR */
49d776ff 3336#ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
657b1989
TI		 3337 if (!substream->ops->page &&
3338 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3339 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3340 area,
3341 substream->runtime->dma_area,
3342 substream->runtime->dma_addr,
3343 area->vm_end - area->vm_start);
49d776ff 3344#endif /* CONFIG_X86 */
657b1989
TI		 3345 /* mmap with fault handler */
3346 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3347 return 0;
3348}
18a2b962 3349EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3350
3351/*
3352 * mmap the DMA buffer on I/O memory area
3353 */
3354#if SNDRV_PCM_INFO_MMAP_IOMEM
30b771cf
TI		 3355/**
3356 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3357 * @substream: PCM substream
3358 * @area: VMA
3359 *
3360 * When your hardware uses the iomapped pages as the hardware buffer and
3361 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3362 * is supposed to work only on limited architectures.
3363 */
877211f5
TI		 3364int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3365 struct vm_area_struct *area)
1da177e4 3366{
0fe09a45 3367 struct snd_pcm_runtime *runtime = substream->runtime;;
1da177e4 3368
1da177e4 3369 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
0fe09a45 3370 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
1da177e4 3371}
e88e8ae6
TI		 3372
3373EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3374#endif /* SNDRV_PCM_INFO_MMAP */
3375
3376/*
3377 * mmap DMA buffer
3378 */
877211f5 3379int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3380 struct vm_area_struct *area)
3381{
877211f5 3382 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3383 long size;
3384 unsigned long offset;
3385 size_t dma_bytes;
657b1989 3386 int err;
1da177e4
LT		 3387
3388 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3389 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3390 return -EINVAL;
3391 } else {
3392 if (!(area->vm_flags & VM_READ))
3393 return -EINVAL;
3394 }
3395 runtime = substream->runtime;
1da177e4
LT		 3396 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3397 return -EBADFD;
3398 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3399 return -ENXIO;
3400 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3401 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3402 return -EINVAL;
3403 size = area->vm_end - area->vm_start;
3404 offset = area->vm_pgoff << PAGE_SHIFT;
3405 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3406 if ((size_t)size > dma_bytes)
3407 return -EINVAL;
3408 if (offset > dma_bytes - size)
3409 return -EINVAL;
3410
657b1989
TI		 3411 area->vm_ops = &snd_pcm_vm_ops_data;
3412 area->vm_private_data = substream;
1da177e4 3413 if (substream->ops->mmap)
657b1989 3414 err = substream->ops->mmap(substream, area);
1da177e4 3415 else
18a2b962 3416 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3417 if (!err)
3418 atomic_inc(&substream->mmap_count);
3419 return err;
1da177e4
LT		 3420}
3421
e88e8ae6
TI		 3422EXPORT_SYMBOL(snd_pcm_mmap_data);
3423
1da177e4
LT		 3424static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3425{
877211f5
TI		 3426 struct snd_pcm_file * pcm_file;
3427 struct snd_pcm_substream *substream;
1da177e4
LT		 3428 unsigned long offset;
3429
3430 pcm_file = file->private_data;
3431 substream = pcm_file->substream;
7eaa943c
TI		 3432 if (PCM_RUNTIME_CHECK(substream))
3433 return -ENXIO;
1da177e4
LT		 3434
3435 offset = area->vm_pgoff << PAGE_SHIFT;
3436 switch (offset) {
3437 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3438 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3439 return -ENXIO;
3440 return snd_pcm_mmap_status(substream, file, area);
3441 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3442 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3443 return -ENXIO;
3444 return snd_pcm_mmap_control(substream, file, area);
3445 default:
3446 return snd_pcm_mmap_data(substream, file, area);
3447 }
3448 return 0;
3449}
3450
3451static int snd_pcm_fasync(int fd, struct file * file, int on)
3452{
877211f5
TI		 3453 struct snd_pcm_file * pcm_file;
3454 struct snd_pcm_substream *substream;
3455 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3456
3457 pcm_file = file->private_data;
3458 substream = pcm_file->substream;
7eaa943c 3459 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3460 return -ENXIO;
1da177e4 3461 runtime = substream->runtime;
d05468b7 3462 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3463}
3464
3465/*
3466 * ioctl32 compat
3467 */
3468#ifdef CONFIG_COMPAT
3469#include "pcm_compat.c"
3470#else
3471#define snd_pcm_ioctl_compat NULL
3472#endif
3473
3474/*
3475 * To be removed helpers to keep binary compatibility
3476 */
3477
59d48582 3478#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3479#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3480#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3481
877211f5
TI		 3482static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3483 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3484{
3485 unsigned int i;
3486
3487 memset(params, 0, sizeof(*params));
3488 params->flags = oparams->flags;
3489 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3490 params->masks[i].bits[0] = oparams->masks[i];
3491 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3492 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3493 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3494 params->info = oparams->info;
3495 params->msbits = oparams->msbits;
3496 params->rate_num = oparams->rate_num;
3497 params->rate_den = oparams->rate_den;
3498 params->fifo_size = oparams->fifo_size;
3499}
3500
877211f5
TI		 3501static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3502 struct snd_pcm_hw_params *params)
1da177e4
LT		 3503{
3504 unsigned int i;
3505
3506 memset(oparams, 0, sizeof(*oparams));
3507 oparams->flags = params->flags;
3508 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3509 oparams->masks[i] = params->masks[i].bits[0];
3510 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3511 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3512 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3513 oparams->info = params->info;
3514 oparams->msbits = params->msbits;
3515 oparams->rate_num = params->rate_num;
3516 oparams->rate_den = params->rate_den;
3517 oparams->fifo_size = params->fifo_size;
3518}
3519
877211f5
TI		 3520static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3521 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3522{
877211f5
TI		 3523 struct snd_pcm_hw_params *params;
3524 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3525 int err;
3526
3527 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3528 if (!params)
3529 return -ENOMEM;
1da177e4 3530
ef44a1ec
LZ		 3531 oparams = memdup_user(_oparams, sizeof(*oparams));
3532 if (IS_ERR(oparams)) {
3533 err = PTR_ERR(oparams);
1da177e4
LT		 3534 goto out;
3535 }
3536 snd_pcm_hw_convert_from_old_params(params, oparams);
3537 err = snd_pcm_hw_refine(substream, params);
3538 snd_pcm_hw_convert_to_old_params(oparams, params);
3539 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3540 if (!err)
3541 err = -EFAULT;
3542 }
ef44a1ec
LZ		 3543
3544 kfree(oparams);
1da177e4
LT		 3545out:
3546 kfree(params);
1da177e4
LT		 3547 return err;
3548}
3549
877211f5
TI		 3550static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3551 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3552{
877211f5
TI		 3553 struct snd_pcm_hw_params *params;
3554 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3555 int err;
3556
3557 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3558 if (!params)
3559 return -ENOMEM;
3560
3561 oparams = memdup_user(_oparams, sizeof(*oparams));
3562 if (IS_ERR(oparams)) {
3563 err = PTR_ERR(oparams);
1da177e4
LT		 3564 goto out;
3565 }
3566 snd_pcm_hw_convert_from_old_params(params, oparams);
3567 err = snd_pcm_hw_params(substream, params);
3568 snd_pcm_hw_convert_to_old_params(oparams, params);
3569 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3570 if (!err)
3571 err = -EFAULT;
3572 }
ef44a1ec
LZ		 3573
3574 kfree(oparams);
1da177e4
LT		 3575out:
3576 kfree(params);
1da177e4
LT		 3577 return err;
3578}
59d48582 3579#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3580
7003609b 3581#ifndef CONFIG_MMU
55c63bd2
DG		 3582static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3583 unsigned long addr,
3584 unsigned long len,
3585 unsigned long pgoff,
3586 unsigned long flags)
3587{
3588 struct snd_pcm_file *pcm_file = file->private_data;
3589 struct snd_pcm_substream *substream = pcm_file->substream;
3590 struct snd_pcm_runtime *runtime = substream->runtime;
3591 unsigned long offset = pgoff << PAGE_SHIFT;
3592
3593 switch (offset) {
3594 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3595 return (unsigned long)runtime->status;
3596 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3597 return (unsigned long)runtime->control;
3598 default:
3599 return (unsigned long)runtime->dma_area + offset;
3600 }
7003609b
CC		 3601}
3602#else
55c63bd2 3603# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3604#endif
3605
1da177e4
LT		 3606/*
3607 * Register section
3608 */
3609
9c2e08c5 3610const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3611 {
2af677fc
CL		 3612 .owner = THIS_MODULE,
3613 .write = snd_pcm_write,
ee0b3e67 3614 .aio_write = snd_pcm_aio_write,
f87135f5 3615 .open = snd_pcm_playback_open,
2af677fc 3616 .release = snd_pcm_release,
02f4865f 3617 .llseek = no_llseek,
2af677fc
CL		 3618 .poll = snd_pcm_playback_poll,
3619 .unlocked_ioctl = snd_pcm_playback_ioctl,
3620 .compat_ioctl = snd_pcm_ioctl_compat,
3621 .mmap = snd_pcm_mmap,
3622 .fasync = snd_pcm_fasync,
55c63bd2 3623 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3624 },
3625 {
2af677fc
CL		 3626 .owner = THIS_MODULE,
3627 .read = snd_pcm_read,
ee0b3e67 3628 .aio_read = snd_pcm_aio_read,
f87135f5 3629 .open = snd_pcm_capture_open,
2af677fc 3630 .release = snd_pcm_release,
02f4865f 3631 .llseek = no_llseek,
2af677fc
CL		 3632 .poll = snd_pcm_capture_poll,
3633 .unlocked_ioctl = snd_pcm_capture_ioctl,
3634 .compat_ioctl = snd_pcm_ioctl_compat,
3635 .mmap = snd_pcm_mmap,
3636 .fasync = snd_pcm_fasync,
55c63bd2 3637 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3638 }
3639};
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