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Merge branch 'topic/pcm-mmap-cleanup' into for-next
[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
7af142f7
TI		 77void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
78{
79 if (substream->pcm->nonatomic) {
80 down_read(&snd_pcm_link_rwsem);
81 mutex_lock(&substream->self_group.mutex);
82 } else {
83 read_lock(&snd_pcm_link_rwlock);
84 spin_lock(&substream->self_group.lock);
85 }
86}
87EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
88
89void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
90{
91 if (substream->pcm->nonatomic) {
92 mutex_unlock(&substream->self_group.mutex);
93 up_read(&snd_pcm_link_rwsem);
94 } else {
95 spin_unlock(&substream->self_group.lock);
96 read_unlock(&snd_pcm_link_rwlock);
97 }
98}
99EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
100
101void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
102{
103 if (!substream->pcm->nonatomic)
104 local_irq_disable();
105 snd_pcm_stream_lock(substream);
106}
107EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
108
109void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
110{
111 snd_pcm_stream_unlock(substream);
112 if (!substream->pcm->nonatomic)
113 local_irq_enable();
114}
115EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
116
117unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
118{
119 unsigned long flags = 0;
120 if (!substream->pcm->nonatomic)
121 local_irq_save(flags);
122 snd_pcm_stream_lock(substream);
123 return flags;
124}
125EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
126
127void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
128 unsigned long flags)
129{
130 snd_pcm_stream_unlock(substream);
131 if (!substream->pcm->nonatomic)
132 local_irq_restore(flags);
133}
134EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
1da177e4
LT		 135
136static inline mm_segment_t snd_enter_user(void)
137{
138 mm_segment_t fs = get_fs();
139 set_fs(get_ds());
140 return fs;
141}
142
143static inline void snd_leave_user(mm_segment_t fs)
144{
145 set_fs(fs);
146}
147
148
149
877211f5 150int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 151{
877211f5
TI		 152 struct snd_pcm_runtime *runtime;
153 struct snd_pcm *pcm = substream->pcm;
154 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 155
1da177e4
LT		 156 memset(info, 0, sizeof(*info));
157 info->card = pcm->card->number;
158 info->device = pcm->device;
159 info->stream = substream->stream;
160 info->subdevice = substream->number;
161 strlcpy(info->id, pcm->id, sizeof(info->id));
162 strlcpy(info->name, pcm->name, sizeof(info->name));
163 info->dev_class = pcm->dev_class;
164 info->dev_subclass = pcm->dev_subclass;
165 info->subdevices_count = pstr->substream_count;
166 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
167 strlcpy(info->subname, substream->name, sizeof(info->subname));
168 runtime = substream->runtime;
169 /* AB: FIXME!!! This is definitely nonsense */
170 if (runtime) {
171 info->sync = runtime->sync;
172 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
173 }
174 return 0;
175}
176
877211f5
TI		 177int snd_pcm_info_user(struct snd_pcm_substream *substream,
178 struct snd_pcm_info __user * _info)
1da177e4 179{
877211f5 180 struct snd_pcm_info *info;
1da177e4
LT		 181 int err;
182
183 info = kmalloc(sizeof(*info), GFP_KERNEL);
184 if (! info)
185 return -ENOMEM;
186 err = snd_pcm_info(substream, info);
187 if (err >= 0) {
188 if (copy_to_user(_info, info, sizeof(*info)))
189 err = -EFAULT;
190 }
191 kfree(info);
192 return err;
193}
194
63825f3a
TI		 195static bool hw_support_mmap(struct snd_pcm_substream *substream)
196{
197 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
198 return false;
199 /* check architectures that return -EINVAL from dma_mmap_coherent() */
200 /* FIXME: this should be some global flag */
201#if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
202 defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
203 if (!substream->ops->mmap &&
204 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
205 return false;
206#endif
207 return true;
208}
209
1da177e4
LT		 210#undef RULES_DEBUG
211
212#ifdef RULES_DEBUG
213#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
47023ec7 214static const char * const snd_pcm_hw_param_names[] = {
1da177e4
LT		 215 HW_PARAM(ACCESS),
216 HW_PARAM(FORMAT),
217 HW_PARAM(SUBFORMAT),
218 HW_PARAM(SAMPLE_BITS),
219 HW_PARAM(FRAME_BITS),
220 HW_PARAM(CHANNELS),
221 HW_PARAM(RATE),
222 HW_PARAM(PERIOD_TIME),
223 HW_PARAM(PERIOD_SIZE),
224 HW_PARAM(PERIOD_BYTES),
225 HW_PARAM(PERIODS),
226 HW_PARAM(BUFFER_TIME),
227 HW_PARAM(BUFFER_SIZE),
228 HW_PARAM(BUFFER_BYTES),
229 HW_PARAM(TICK_TIME),
230};
231#endif
232
877211f5
TI		 233int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
234 struct snd_pcm_hw_params *params)
1da177e4
LT		 235{
236 unsigned int k;
877211f5
TI		 237 struct snd_pcm_hardware *hw;
238 struct snd_interval *i = NULL;
239 struct snd_mask *m = NULL;
240 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 241 unsigned int rstamps[constrs->rules_num];
242 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
243 unsigned int stamp = 2;
244 int changed, again;
245
246 params->info = 0;
247 params->fifo_size = 0;
248 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
249 params->msbits = 0;
250 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
251 params->rate_num = 0;
252 params->rate_den = 0;
253 }
254
255 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
256 m = hw_param_mask(params, k);
257 if (snd_mask_empty(m))
258 return -EINVAL;
259 if (!(params->rmask & (1 << k)))
260 continue;
261#ifdef RULES_DEBUG
09e56df8
TI		 262 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
263 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
1da177e4
LT		 264#endif
265 changed = snd_mask_refine(m, constrs_mask(constrs, k));
266#ifdef RULES_DEBUG
09e56df8 267 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
1da177e4
LT		 268#endif
269 if (changed)
270 params->cmask |= 1 << k;
271 if (changed < 0)
272 return changed;
273 }
274
275 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
276 i = hw_param_interval(params, k);
277 if (snd_interval_empty(i))
278 return -EINVAL;
279 if (!(params->rmask & (1 << k)))
280 continue;
281#ifdef RULES_DEBUG
09e56df8 282 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
1da177e4 283 if (i->empty)
09e56df8 284 pr_cont("empty");
1da177e4 285 else
09e56df8 286 pr_cont("%c%u %u%c",
1da177e4
LT		 287 i->openmin ? '(' : '[', i->min,
288 i->max, i->openmax ? ')' : ']');
09e56df8 289 pr_cont(" -> ");
1da177e4
LT		 290#endif
291 changed = snd_interval_refine(i, constrs_interval(constrs, k));
292#ifdef RULES_DEBUG
293 if (i->empty)
09e56df8 294 pr_cont("empty\n");
1da177e4 295 else
09e56df8 296 pr_cont("%c%u %u%c\n",
1da177e4
LT		 297 i->openmin ? '(' : '[', i->min,
298 i->max, i->openmax ? ')' : ']');
299#endif
300 if (changed)
301 params->cmask |= 1 << k;
302 if (changed < 0)
303 return changed;
304 }
305
306 for (k = 0; k < constrs->rules_num; k++)
307 rstamps[k] = 0;
308 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
309 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
310 do {
311 again = 0;
312 for (k = 0; k < constrs->rules_num; k++) {
877211f5 313 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 314 unsigned int d;
315 int doit = 0;
316 if (r->cond && !(r->cond & params->flags))
317 continue;
318 for (d = 0; r->deps[d] >= 0; d++) {
319 if (vstamps[r->deps[d]] > rstamps[k]) {
320 doit = 1;
321 break;
322 }
323 }
324 if (!doit)
325 continue;
326#ifdef RULES_DEBUG
09e56df8 327 pr_debug("Rule %d [%p]: ", k, r->func);
1da177e4 328 if (r->var >= 0) {
09e56df8 329 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]);
1da177e4
LT		 330 if (hw_is_mask(r->var)) {
331 m = hw_param_mask(params, r->var);
09e56df8 332 pr_cont("%x", *m->bits);
1da177e4
LT		 333 } else {
334 i = hw_param_interval(params, r->var);
335 if (i->empty)
09e56df8 336 pr_cont("empty");
1da177e4 337 else
09e56df8 338 pr_cont("%c%u %u%c",
1da177e4
LT		 339 i->openmin ? '(' : '[', i->min,
340 i->max, i->openmax ? ')' : ']');
341 }
342 }
343#endif
344 changed = r->func(params, r);
345#ifdef RULES_DEBUG
346 if (r->var >= 0) {
09e56df8 347 pr_cont(" -> ");
1da177e4 348 if (hw_is_mask(r->var))
09e56df8 349 pr_cont("%x", *m->bits);
1da177e4
LT		 350 else {
351 if (i->empty)
09e56df8 352 pr_cont("empty");
1da177e4 353 else
09e56df8 354 pr_cont("%c%u %u%c",
1da177e4
LT		 355 i->openmin ? '(' : '[', i->min,
356 i->max, i->openmax ? ')' : ']');
357 }
358 }
09e56df8 359 pr_cont("\n");
1da177e4
LT		 360#endif
361 rstamps[k] = stamp;
362 if (changed && r->var >= 0) {
363 params->cmask |= (1 << r->var);
364 vstamps[r->var] = stamp;
365 again = 1;
366 }
367 if (changed < 0)
368 return changed;
369 stamp++;
370 }
371 } while (again);
372 if (!params->msbits) {
373 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
374 if (snd_interval_single(i))
375 params->msbits = snd_interval_value(i);
376 }
377
378 if (!params->rate_den) {
379 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
380 if (snd_interval_single(i)) {
381 params->rate_num = snd_interval_value(i);
382 params->rate_den = 1;
383 }
384 }
385
386 hw = &substream->runtime->hw;
63825f3a 387 if (!params->info) {
8bea869c 388 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
63825f3a
TI		 389 if (!hw_support_mmap(substream))
390 params->info &= ~(SNDRV_PCM_INFO_MMAP |
391 SNDRV_PCM_INFO_MMAP_VALID);
392 }
8bea869c 393 if (!params->fifo_size) {
3be522a9
JK		 394 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
395 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
396 if (snd_mask_min(m) == snd_mask_max(m) &&
397 snd_interval_min(i) == snd_interval_max(i)) {
8bea869c
JK		 398 changed = substream->ops->ioctl(substream,
399 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
8bd9bca3 400 if (changed < 0)
8bea869c
JK		 401 return changed;
402 }
403 }
1da177e4
LT		 404 params->rmask = 0;
405 return 0;
406}
407
e88e8ae6
TI		 408EXPORT_SYMBOL(snd_pcm_hw_refine);
409
877211f5
TI		 410static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
411 struct snd_pcm_hw_params __user * _params)
1da177e4 412{
877211f5 413 struct snd_pcm_hw_params *params;
1da177e4
LT		 414 int err;
415
ef44a1ec
LZ		 416 params = memdup_user(_params, sizeof(*params));
417 if (IS_ERR(params))
418 return PTR_ERR(params);
419
1da177e4
LT		 420 err = snd_pcm_hw_refine(substream, params);
421 if (copy_to_user(_params, params, sizeof(*params))) {
422 if (!err)
423 err = -EFAULT;
424 }
ef44a1ec 425
1da177e4
LT		 426 kfree(params);
427 return err;
428}
429
9442e691
TI		 430static int period_to_usecs(struct snd_pcm_runtime *runtime)
431{
432 int usecs;
433
434 if (! runtime->rate)
435 return -1; /* invalid */
436
437 /* take 75% of period time as the deadline */
438 usecs = (750000 / runtime->rate) * runtime->period_size;
439 usecs += ((750000 % runtime->rate) * runtime->period_size) /
440 runtime->rate;
441
442 return usecs;
443}
444
9b0573c0
TI		 445static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
446{
447 snd_pcm_stream_lock_irq(substream);
448 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
449 substream->runtime->status->state = state;
450 snd_pcm_stream_unlock_irq(substream);
451}
452
877211f5
TI		 453static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
454 struct snd_pcm_hw_params *params)
1da177e4 455{
877211f5 456 struct snd_pcm_runtime *runtime;
9442e691 457 int err, usecs;
1da177e4
LT		 458 unsigned int bits;
459 snd_pcm_uframes_t frames;
460
7eaa943c
TI		 461 if (PCM_RUNTIME_CHECK(substream))
462 return -ENXIO;
1da177e4 463 runtime = substream->runtime;
1da177e4
LT		 464 snd_pcm_stream_lock_irq(substream);
465 switch (runtime->status->state) {
466 case SNDRV_PCM_STATE_OPEN:
467 case SNDRV_PCM_STATE_SETUP:
468 case SNDRV_PCM_STATE_PREPARED:
469 break;
470 default:
471 snd_pcm_stream_unlock_irq(substream);
472 return -EBADFD;
473 }
474 snd_pcm_stream_unlock_irq(substream);
8eeaa2f9 475#if IS_ENABLED(CONFIG_SND_PCM_OSS)
1da177e4
LT		 476 if (!substream->oss.oss)
477#endif
9c323fcb 478 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 479 return -EBADFD;
480
481 params->rmask = ~0U;
482 err = snd_pcm_hw_refine(substream, params);
483 if (err < 0)
484 goto _error;
485
486 err = snd_pcm_hw_params_choose(substream, params);
487 if (err < 0)
488 goto _error;
489
490 if (substream->ops->hw_params != NULL) {
491 err = substream->ops->hw_params(substream, params);
492 if (err < 0)
493 goto _error;
494 }
495
496 runtime->access = params_access(params);
497 runtime->format = params_format(params);
498 runtime->subformat = params_subformat(params);
499 runtime->channels = params_channels(params);
500 runtime->rate = params_rate(params);
501 runtime->period_size = params_period_size(params);
502 runtime->periods = params_periods(params);
503 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 504 runtime->info = params->info;
505 runtime->rate_num = params->rate_num;
506 runtime->rate_den = params->rate_den;
ab69a490
CL		 507 runtime->no_period_wakeup =
508 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
509 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 510
511 bits = snd_pcm_format_physical_width(runtime->format);
512 runtime->sample_bits = bits;
513 bits *= runtime->channels;
514 runtime->frame_bits = bits;
515 frames = 1;
516 while (bits % 8 != 0) {
517 bits *= 2;
518 frames *= 2;
519 }
520 runtime->byte_align = bits / 8;
521 runtime->min_align = frames;
522
523 /* Default sw params */
524 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
525 runtime->period_step = 1;
1da177e4 526 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 527 runtime->start_threshold = 1;
528 runtime->stop_threshold = runtime->buffer_size;
529 runtime->silence_threshold = 0;
530 runtime->silence_size = 0;
ead4046b
CL		 531 runtime->boundary = runtime->buffer_size;
532 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
533 runtime->boundary *= 2;
1da177e4
LT		 534
535 snd_pcm_timer_resolution_change(substream);
9b0573c0 536 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
9442e691 537
82f68251
JB		 538 if (pm_qos_request_active(&substream->latency_pm_qos_req))
539 pm_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 540 if ((usecs = period_to_usecs(runtime)) >= 0)
82f68251
JB		 541 pm_qos_add_request(&substream->latency_pm_qos_req,
542 PM_QOS_CPU_DMA_LATENCY, usecs);
1da177e4
LT		 543 return 0;
544 _error:
25985edc 545 /* hardware might be unusable from this time,
1da177e4
LT		 546 so we force application to retry to set
547 the correct hardware parameter settings */
9b0573c0 548 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
1da177e4
LT		 549 if (substream->ops->hw_free != NULL)
550 substream->ops->hw_free(substream);
551 return err;
552}
553
877211f5
TI		 554static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
555 struct snd_pcm_hw_params __user * _params)
1da177e4 556{
877211f5 557 struct snd_pcm_hw_params *params;
1da177e4
LT		 558 int err;
559
ef44a1ec
LZ		 560 params = memdup_user(_params, sizeof(*params));
561 if (IS_ERR(params))
562 return PTR_ERR(params);
563
1da177e4
LT		 564 err = snd_pcm_hw_params(substream, params);
565 if (copy_to_user(_params, params, sizeof(*params))) {
566 if (!err)
567 err = -EFAULT;
568 }
ef44a1ec 569
1da177e4
LT		 570 kfree(params);
571 return err;
572}
573
877211f5 574static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 575{
877211f5 576 struct snd_pcm_runtime *runtime;
1da177e4
LT		 577 int result = 0;
578
7eaa943c
TI		 579 if (PCM_RUNTIME_CHECK(substream))
580 return -ENXIO;
1da177e4 581 runtime = substream->runtime;
1da177e4
LT		 582 snd_pcm_stream_lock_irq(substream);
583 switch (runtime->status->state) {
584 case SNDRV_PCM_STATE_SETUP:
585 case SNDRV_PCM_STATE_PREPARED:
586 break;
587 default:
588 snd_pcm_stream_unlock_irq(substream);
589 return -EBADFD;
590 }
591 snd_pcm_stream_unlock_irq(substream);
9c323fcb 592 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 593 return -EBADFD;
594 if (substream->ops->hw_free)
595 result = substream->ops->hw_free(substream);
9b0573c0 596 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
82f68251 597 pm_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 598 return result;
599}
600
877211f5
TI		 601static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
602 struct snd_pcm_sw_params *params)
1da177e4 603{
877211f5 604 struct snd_pcm_runtime *runtime;
1250932e 605 int err;
1da177e4 606
7eaa943c
TI		 607 if (PCM_RUNTIME_CHECK(substream))
608 return -ENXIO;
1da177e4 609 runtime = substream->runtime;
1da177e4
LT		 610 snd_pcm_stream_lock_irq(substream);
611 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
612 snd_pcm_stream_unlock_irq(substream);
613 return -EBADFD;
614 }
615 snd_pcm_stream_unlock_irq(substream);
616
617 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
618 return -EINVAL;
58900810
TI		 619 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
620 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
5646eda5 621 return -EINVAL;
1da177e4
LT		 622 if (params->avail_min == 0)
623 return -EINVAL;
1da177e4
LT		 624 if (params->silence_size >= runtime->boundary) {
625 if (params->silence_threshold != 0)
626 return -EINVAL;
627 } else {
628 if (params->silence_size > params->silence_threshold)
629 return -EINVAL;
630 if (params->silence_threshold > runtime->buffer_size)
631 return -EINVAL;
632 }
1250932e 633 err = 0;
1da177e4
LT		 634 snd_pcm_stream_lock_irq(substream);
635 runtime->tstamp_mode = params->tstamp_mode;
58900810
TI		 636 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
637 runtime->tstamp_type = params->tstamp_type;
1da177e4
LT		 638 runtime->period_step = params->period_step;
639 runtime->control->avail_min = params->avail_min;
640 runtime->start_threshold = params->start_threshold;
641 runtime->stop_threshold = params->stop_threshold;
642 runtime->silence_threshold = params->silence_threshold;
643 runtime->silence_size = params->silence_size;
1da177e4
LT		 644 params->boundary = runtime->boundary;
645 if (snd_pcm_running(substream)) {
1da177e4
LT		 646 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
647 runtime->silence_size > 0)
648 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 649 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 650 }
651 snd_pcm_stream_unlock_irq(substream);
1250932e 652 return err;
1da177e4
LT		 653}
654
877211f5
TI		 655static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
656 struct snd_pcm_sw_params __user * _params)
1da177e4 657{
877211f5 658 struct snd_pcm_sw_params params;
1da177e4
LT		 659 int err;
660 if (copy_from_user(&params, _params, sizeof(params)))
661 return -EFAULT;
662 err = snd_pcm_sw_params(substream, &params);
663 if (copy_to_user(_params, &params, sizeof(params)))
664 return -EFAULT;
665 return err;
666}
667
877211f5
TI		 668int snd_pcm_status(struct snd_pcm_substream *substream,
669 struct snd_pcm_status *status)
1da177e4 670{
877211f5 671 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 672
673 snd_pcm_stream_lock_irq(substream);
674 status->state = runtime->status->state;
675 status->suspended_state = runtime->status->suspended_state;
676 if (status->state == SNDRV_PCM_STATE_OPEN)
677 goto _end;
678 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 679 if (snd_pcm_running(substream)) {
1da177e4 680 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 681 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
682 status->tstamp = runtime->status->tstamp;
4eeaaeae
PLB		 683 status->audio_tstamp =
684 runtime->status->audio_tstamp;
8c121586
JK		 685 goto _tstamp_end;
686 }
687 }
a713b583 688 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 689 _tstamp_end:
1da177e4
LT		 690 status->appl_ptr = runtime->control->appl_ptr;
691 status->hw_ptr = runtime->status->hw_ptr;
692 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
693 status->avail = snd_pcm_playback_avail(runtime);
694 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 695 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 696 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 697 status->delay += runtime->delay;
698 } else
1da177e4
LT		 699 status->delay = 0;
700 } else {
701 status->avail = snd_pcm_capture_avail(runtime);
702 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 703 status->delay = status->avail + runtime->delay;
1da177e4
LT		 704 else
705 status->delay = 0;
706 }
707 status->avail_max = runtime->avail_max;
708 status->overrange = runtime->overrange;
709 runtime->avail_max = 0;
710 runtime->overrange = 0;
711 _end:
712 snd_pcm_stream_unlock_irq(substream);
713 return 0;
714}
715
877211f5
TI		 716static int snd_pcm_status_user(struct snd_pcm_substream *substream,
717 struct snd_pcm_status __user * _status)
1da177e4 718{
877211f5 719 struct snd_pcm_status status;
1da177e4
LT		 720 int res;
721
1da177e4
LT		 722 memset(&status, 0, sizeof(status));
723 res = snd_pcm_status(substream, &status);
724 if (res < 0)
725 return res;
726 if (copy_to_user(_status, &status, sizeof(status)))
727 return -EFAULT;
728 return 0;
729}
730
877211f5
TI		 731static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
732 struct snd_pcm_channel_info * info)
1da177e4 733{
877211f5 734 struct snd_pcm_runtime *runtime;
1da177e4
LT		 735 unsigned int channel;
736
1da177e4
LT		 737 channel = info->channel;
738 runtime = substream->runtime;
739 snd_pcm_stream_lock_irq(substream);
740 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
741 snd_pcm_stream_unlock_irq(substream);
742 return -EBADFD;
743 }
744 snd_pcm_stream_unlock_irq(substream);
745 if (channel >= runtime->channels)
746 return -EINVAL;
747 memset(info, 0, sizeof(*info));
748 info->channel = channel;
749 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
750}
751
877211f5
TI		 752static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
753 struct snd_pcm_channel_info __user * _info)
1da177e4 754{
877211f5 755 struct snd_pcm_channel_info info;
1da177e4
LT		 756 int res;
757
758 if (copy_from_user(&info, _info, sizeof(info)))
759 return -EFAULT;
760 res = snd_pcm_channel_info(substream, &info);
761 if (res < 0)
762 return res;
763 if (copy_to_user(_info, &info, sizeof(info)))
764 return -EFAULT;
765 return 0;
766}
767
877211f5 768static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 769{
877211f5 770 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 771 if (runtime->trigger_master == NULL)
772 return;
773 if (runtime->trigger_master == substream) {
b751eef1 774 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 775 } else {
776 snd_pcm_trigger_tstamp(runtime->trigger_master);
777 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
778 }
779 runtime->trigger_master = NULL;
780}
781
782struct action_ops {
877211f5
TI		 783 int (*pre_action)(struct snd_pcm_substream *substream, int state);
784 int (*do_action)(struct snd_pcm_substream *substream, int state);
785 void (*undo_action)(struct snd_pcm_substream *substream, int state);
786 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 787};
788
789/*
790 * this functions is core for handling of linked stream
791 * Note: the stream state might be changed also on failure
792 * Note2: call with calling stream lock + link lock
793 */
794static int snd_pcm_action_group(struct action_ops *ops,
877211f5 795 struct snd_pcm_substream *substream,
1da177e4
LT		 796 int state, int do_lock)
797{
877211f5
TI		 798 struct snd_pcm_substream *s = NULL;
799 struct snd_pcm_substream *s1;
1da177e4
LT		 800 int res = 0;
801
ef991b95 802 snd_pcm_group_for_each_entry(s, substream) {
257f8cce
TI		 803 if (do_lock && s != substream) {
804 if (s->pcm->nonatomic)
805 mutex_lock_nested(&s->self_group.mutex,
806 SINGLE_DEPTH_NESTING);
807 else
808 spin_lock_nested(&s->self_group.lock,
809 SINGLE_DEPTH_NESTING);
810 }
1da177e4
LT		 811 res = ops->pre_action(s, state);
812 if (res < 0)
813 goto _unlock;
814 }
ef991b95 815 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 816 res = ops->do_action(s, state);
817 if (res < 0) {
818 if (ops->undo_action) {
ef991b95 819 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 820 if (s1 == s) /* failed stream */
821 break;
822 ops->undo_action(s1, state);
823 }
824 }
825 s = NULL; /* unlock all */
826 goto _unlock;
827 }
828 }
ef991b95 829 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 830 ops->post_action(s, state);
831 }
832 _unlock:
833 if (do_lock) {
834 /* unlock streams */
ef991b95 835 snd_pcm_group_for_each_entry(s1, substream) {
257f8cce 836 if (s1 != substream) {
811deede 837 if (s1->pcm->nonatomic)
257f8cce
TI		 838 mutex_unlock(&s1->self_group.mutex);
839 else
840 spin_unlock(&s1->self_group.lock);
841 }
1da177e4
LT		 842 if (s1 == s) /* end */
843 break;
844 }
845 }
846 return res;
847}
848
849/*
850 * Note: call with stream lock
851 */
852static int snd_pcm_action_single(struct action_ops *ops,
877211f5 853 struct snd_pcm_substream *substream,
1da177e4
LT		 854 int state)
855{
856 int res;
857
858 res = ops->pre_action(substream, state);
859 if (res < 0)
860 return res;
861 res = ops->do_action(substream, state);
862 if (res == 0)
863 ops->post_action(substream, state);
864 else if (ops->undo_action)
865 ops->undo_action(substream, state);
866 return res;
867}
868
257f8cce
TI		 869/* call in mutex-protected context */
870static int snd_pcm_action_mutex(struct action_ops *ops,
871 struct snd_pcm_substream *substream,
872 int state)
873{
874 int res;
875
876 if (snd_pcm_stream_linked(substream)) {
877 if (!mutex_trylock(&substream->group->mutex)) {
878 mutex_unlock(&substream->self_group.mutex);
879 mutex_lock(&substream->group->mutex);
880 mutex_lock(&substream->self_group.mutex);
881 }
882 res = snd_pcm_action_group(ops, substream, state, 1);
883 mutex_unlock(&substream->group->mutex);
884 } else {
885 res = snd_pcm_action_single(ops, substream, state);
886 }
887 return res;
888}
889
1da177e4
LT		 890/*
891 * Note: call with stream lock
892 */
893static int snd_pcm_action(struct action_ops *ops,
877211f5 894 struct snd_pcm_substream *substream,
1da177e4
LT		 895 int state)
896{
897 int res;
898
257f8cce
TI		 899 if (substream->pcm->nonatomic)
900 return snd_pcm_action_mutex(ops, substream, state);
901
1da177e4
LT		 902 if (snd_pcm_stream_linked(substream)) {
903 if (!spin_trylock(&substream->group->lock)) {
904 spin_unlock(&substream->self_group.lock);
905 spin_lock(&substream->group->lock);
906 spin_lock(&substream->self_group.lock);
907 }
908 res = snd_pcm_action_group(ops, substream, state, 1);
909 spin_unlock(&substream->group->lock);
910 } else {
911 res = snd_pcm_action_single(ops, substream, state);
912 }
913 return res;
914}
915
257f8cce
TI		 916static int snd_pcm_action_lock_mutex(struct action_ops *ops,
917 struct snd_pcm_substream *substream,
918 int state)
919{
920 int res;
921
922 down_read(&snd_pcm_link_rwsem);
923 if (snd_pcm_stream_linked(substream)) {
924 mutex_lock(&substream->group->mutex);
925 mutex_lock_nested(&substream->self_group.mutex,
926 SINGLE_DEPTH_NESTING);
927 res = snd_pcm_action_group(ops, substream, state, 1);
928 mutex_unlock(&substream->self_group.mutex);
929 mutex_unlock(&substream->group->mutex);
930 } else {
931 mutex_lock(&substream->self_group.mutex);
932 res = snd_pcm_action_single(ops, substream, state);
933 mutex_unlock(&substream->self_group.mutex);
934 }
935 up_read(&snd_pcm_link_rwsem);
936 return res;
937}
938
1da177e4
LT		 939/*
940 * Note: don't use any locks before
941 */
942static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 943 struct snd_pcm_substream *substream,
1da177e4
LT		 944 int state)
945{
946 int res;
947
257f8cce
TI		 948 if (substream->pcm->nonatomic)
949 return snd_pcm_action_lock_mutex(ops, substream, state);
950
1da177e4
LT		 951 read_lock_irq(&snd_pcm_link_rwlock);
952 if (snd_pcm_stream_linked(substream)) {
953 spin_lock(&substream->group->lock);
954 spin_lock(&substream->self_group.lock);
955 res = snd_pcm_action_group(ops, substream, state, 1);
956 spin_unlock(&substream->self_group.lock);
957 spin_unlock(&substream->group->lock);
958 } else {
959 spin_lock(&substream->self_group.lock);
960 res = snd_pcm_action_single(ops, substream, state);
961 spin_unlock(&substream->self_group.lock);
962 }
963 read_unlock_irq(&snd_pcm_link_rwlock);
964 return res;
965}
966
967/*
968 */
969static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 970 struct snd_pcm_substream *substream,
1da177e4
LT		 971 int state)
972{
973 int res;
974
975 down_read(&snd_pcm_link_rwsem);
976 if (snd_pcm_stream_linked(substream))
977 res = snd_pcm_action_group(ops, substream, state, 0);
978 else
979 res = snd_pcm_action_single(ops, substream, state);
980 up_read(&snd_pcm_link_rwsem);
981 return res;
982}
983
984/*
985 * start callbacks
986 */
877211f5 987static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 988{
877211f5 989 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 990 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
991 return -EBADFD;
992 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
993 !snd_pcm_playback_data(substream))
994 return -EPIPE;
995 runtime->trigger_master = substream;
996 return 0;
997}
998
877211f5 999static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1000{
1001 if (substream->runtime->trigger_master != substream)
1002 return 0;
1003 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1004}
1005
877211f5 1006static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1007{
1008 if (substream->runtime->trigger_master == substream)
1009 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1010}
1011
877211f5 1012static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 1013{
877211f5 1014 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1015 snd_pcm_trigger_tstamp(substream);
6af3fb72 1016 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 1017 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1018 runtime->rate;
1da177e4
LT		 1019 runtime->status->state = state;
1020 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1021 runtime->silence_size > 0)
1022 snd_pcm_playback_silence(substream, ULONG_MAX);
1da177e4 1023 if (substream->timer)
877211f5
TI		 1024 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
1025 &runtime->trigger_tstamp);
1da177e4
LT		 1026}
1027
1028static struct action_ops snd_pcm_action_start = {
1029 .pre_action = snd_pcm_pre_start,
1030 .do_action = snd_pcm_do_start,
1031 .undo_action = snd_pcm_undo_start,
1032 .post_action = snd_pcm_post_start
1033};
1034
1035/**
1c85cc64 1036 * snd_pcm_start - start all linked streams
df8db936 1037 * @substream: the PCM substream instance
eb7c06e8
YB		 1038 *
1039 * Return: Zero if successful, or a negative error code.
1da177e4 1040 */
877211f5 1041int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 1042{
877211f5
TI		 1043 return snd_pcm_action(&snd_pcm_action_start, substream,
1044 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 1045}
1046
1047/*
1048 * stop callbacks
1049 */
877211f5 1050static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1051{
877211f5 1052 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1053 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1054 return -EBADFD;
1055 runtime->trigger_master = substream;
1056 return 0;
1057}
1058
877211f5 1059static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1060{
1061 if (substream->runtime->trigger_master == substream &&
1062 snd_pcm_running(substream))
1063 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1064 return 0; /* unconditonally stop all substreams */
1065}
1066
877211f5 1067static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 1068{
877211f5 1069 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1070 if (runtime->status->state != state) {
1071 snd_pcm_trigger_tstamp(substream);
1072 if (substream->timer)
877211f5
TI		 1073 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
1074 &runtime->trigger_tstamp);
1da177e4 1075 runtime->status->state = state;
1da177e4
LT		 1076 }
1077 wake_up(&runtime->sleep);
c91a988d 1078 wake_up(&runtime->tsleep);
1da177e4
LT		 1079}
1080
1081static struct action_ops snd_pcm_action_stop = {
1082 .pre_action = snd_pcm_pre_stop,
1083 .do_action = snd_pcm_do_stop,
1084 .post_action = snd_pcm_post_stop
1085};
1086
1087/**
1c85cc64 1088 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 1089 * @substream: the PCM substream instance
1090 * @state: PCM state after stopping the stream
1da177e4 1091 *
1c85cc64 1092 * The state of each stream is then changed to the given state unconditionally.
eb7c06e8 1093 *
0a11458c 1094 * Return: Zero if successful, or a negative error code.
1da177e4 1095 */
fea952e5 1096int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 1097{
1098 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1099}
1100
e88e8ae6
TI		 1101EXPORT_SYMBOL(snd_pcm_stop);
1102
1da177e4 1103/**
1c85cc64 1104 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 1105 * @substream: the PCM substream
1da177e4 1106 *
1c85cc64 1107 * After stopping, the state is changed to SETUP.
1da177e4 1108 * Unlike snd_pcm_stop(), this affects only the given stream.
eb7c06e8
YB		 1109 *
1110 * Return: Zero if succesful, or a negative error code.
1da177e4 1111 */
877211f5 1112int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 1113{
877211f5
TI		 1114 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1115 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 1116}
1117
1118/*
1119 * pause callbacks
1120 */
877211f5 1121static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1122{
877211f5 1123 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1124 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1125 return -ENOSYS;
1126 if (push) {
1127 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1128 return -EBADFD;
1129 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1130 return -EBADFD;
1131 runtime->trigger_master = substream;
1132 return 0;
1133}
1134
877211f5 1135static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1136{
1137 if (substream->runtime->trigger_master != substream)
1138 return 0;
56385a12
JK		 1139 /* some drivers might use hw_ptr to recover from the pause -
1140 update the hw_ptr now */
1141 if (push)
1142 snd_pcm_update_hw_ptr(substream);
6af3fb72 1143 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 1144 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1145 * delta, effectively to skip the check once.
1146 */
1147 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 1148 return substream->ops->trigger(substream,
1149 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1150 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1151}
1152
877211f5 1153static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1154{
1155 if (substream->runtime->trigger_master == substream)
1156 substream->ops->trigger(substream,
1157 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1158 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1159}
1160
877211f5 1161static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1162{
877211f5 1163 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1164 snd_pcm_trigger_tstamp(substream);
1165 if (push) {
1166 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1167 if (substream->timer)
877211f5
TI		 1168 snd_timer_notify(substream->timer,
1169 SNDRV_TIMER_EVENT_MPAUSE,
1170 &runtime->trigger_tstamp);
1da177e4 1171 wake_up(&runtime->sleep);
c91a988d 1172 wake_up(&runtime->tsleep);
1da177e4
LT		 1173 } else {
1174 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1da177e4 1175 if (substream->timer)
877211f5
TI		 1176 snd_timer_notify(substream->timer,
1177 SNDRV_TIMER_EVENT_MCONTINUE,
1178 &runtime->trigger_tstamp);
1da177e4
LT		 1179 }
1180}
1181
1182static struct action_ops snd_pcm_action_pause = {
1183 .pre_action = snd_pcm_pre_pause,
1184 .do_action = snd_pcm_do_pause,
1185 .undo_action = snd_pcm_undo_pause,
1186 .post_action = snd_pcm_post_pause
1187};
1188
1189/*
1190 * Push/release the pause for all linked streams.
1191 */
877211f5 1192static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1193{
1194 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1195}
1196
1197#ifdef CONFIG_PM
1198/* suspend */
1199
877211f5 1200static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1201{
877211f5 1202 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1203 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1204 return -EBUSY;
1205 runtime->trigger_master = substream;
1206 return 0;
1207}
1208
877211f5 1209static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1210{
877211f5 1211 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1212 if (runtime->trigger_master != substream)
1213 return 0;
1214 if (! snd_pcm_running(substream))
1215 return 0;
1216 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1217 return 0; /* suspend unconditionally */
1218}
1219
877211f5 1220static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1221{
877211f5 1222 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1223 snd_pcm_trigger_tstamp(substream);
1224 if (substream->timer)
877211f5
TI		 1225 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1226 &runtime->trigger_tstamp);
1da177e4
LT		 1227 runtime->status->suspended_state = runtime->status->state;
1228 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1da177e4 1229 wake_up(&runtime->sleep);
c91a988d 1230 wake_up(&runtime->tsleep);
1da177e4
LT		 1231}
1232
1233static struct action_ops snd_pcm_action_suspend = {
1234 .pre_action = snd_pcm_pre_suspend,
1235 .do_action = snd_pcm_do_suspend,
1236 .post_action = snd_pcm_post_suspend
1237};
1238
1239/**
1c85cc64 1240 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1241 * @substream: the PCM substream
1da177e4 1242 *
1da177e4 1243 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1244 *
1245 * Return: Zero if successful (or @substream is %NULL), or a negative error
1246 * code.
1da177e4 1247 */
877211f5 1248int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1249{
1250 int err;
1251 unsigned long flags;
1252
603bf524
TI		 1253 if (! substream)
1254 return 0;
1255
1da177e4
LT		 1256 snd_pcm_stream_lock_irqsave(substream, flags);
1257 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1258 snd_pcm_stream_unlock_irqrestore(substream, flags);
1259 return err;
1260}
1261
e88e8ae6
TI		 1262EXPORT_SYMBOL(snd_pcm_suspend);
1263
1da177e4 1264/**
1c85cc64 1265 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1266 * @pcm: the PCM instance
1da177e4 1267 *
1da177e4 1268 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1269 *
1270 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1da177e4 1271 */
877211f5 1272int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1273{
877211f5 1274 struct snd_pcm_substream *substream;
1da177e4
LT		 1275 int stream, err = 0;
1276
603bf524
TI		 1277 if (! pcm)
1278 return 0;
1279
1da177e4 1280 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1281 for (substream = pcm->streams[stream].substream;
1282 substream; substream = substream->next) {
1da177e4
LT		 1283 /* FIXME: the open/close code should lock this as well */
1284 if (substream->runtime == NULL)
1285 continue;
1286 err = snd_pcm_suspend(substream);
1287 if (err < 0 && err != -EBUSY)
1288 return err;
1289 }
1290 }
1291 return 0;
1292}
1293
e88e8ae6
TI		 1294EXPORT_SYMBOL(snd_pcm_suspend_all);
1295
1da177e4
LT		 1296/* resume */
1297
877211f5 1298static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1299{
877211f5 1300 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1301 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1302 return -ENOSYS;
1303 runtime->trigger_master = substream;
1304 return 0;
1305}
1306
877211f5 1307static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1308{
877211f5 1309 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1310 if (runtime->trigger_master != substream)
1311 return 0;
1312 /* DMA not running previously? */
1313 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1314 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1315 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1316 return 0;
1317 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1318}
1319
877211f5 1320static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1321{
1322 if (substream->runtime->trigger_master == substream &&
1323 snd_pcm_running(substream))
1324 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1325}
1326
877211f5 1327static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1328{
877211f5 1329 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1330 snd_pcm_trigger_tstamp(substream);
1331 if (substream->timer)
877211f5
TI		 1332 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1333 &runtime->trigger_tstamp);
1da177e4 1334 runtime->status->state = runtime->status->suspended_state;
1da177e4
LT		 1335}
1336
1337static struct action_ops snd_pcm_action_resume = {
1338 .pre_action = snd_pcm_pre_resume,
1339 .do_action = snd_pcm_do_resume,
1340 .undo_action = snd_pcm_undo_resume,
1341 .post_action = snd_pcm_post_resume
1342};
1343
877211f5 1344static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1345{
877211f5 1346 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1347 int res;
1348
1349 snd_power_lock(card);
cbac4b0c 1350 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1351 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1352 snd_power_unlock(card);
1353 return res;
1354}
1355
1356#else
1357
877211f5 1358static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1359{
1360 return -ENOSYS;
1361}
1362
1363#endif /* CONFIG_PM */
1364
1365/*
1366 * xrun ioctl
1367 *
1368 * Change the RUNNING stream(s) to XRUN state.
1369 */
877211f5 1370static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1371{
877211f5
TI		 1372 struct snd_card *card = substream->pcm->card;
1373 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1374 int result;
1375
1376 snd_power_lock(card);
1377 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1378 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1379 if (result < 0)
1380 goto _unlock;
1381 }
1382
1383 snd_pcm_stream_lock_irq(substream);
1384 switch (runtime->status->state) {
1385 case SNDRV_PCM_STATE_XRUN:
1386 result = 0; /* already there */
1387 break;
1388 case SNDRV_PCM_STATE_RUNNING:
1389 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1390 break;
1391 default:
1392 result = -EBADFD;
1393 }
1394 snd_pcm_stream_unlock_irq(substream);
1395 _unlock:
1396 snd_power_unlock(card);
1397 return result;
1398}
1399
1400/*
1401 * reset ioctl
1402 */
877211f5 1403static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1404{
877211f5 1405 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1406 switch (runtime->status->state) {
1407 case SNDRV_PCM_STATE_RUNNING:
1408 case SNDRV_PCM_STATE_PREPARED:
1409 case SNDRV_PCM_STATE_PAUSED:
1410 case SNDRV_PCM_STATE_SUSPENDED:
1411 return 0;
1412 default:
1413 return -EBADFD;
1414 }
1415}
1416
877211f5 1417static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1418{
877211f5 1419 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1420 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1421 if (err < 0)
1422 return err;
1da177e4 1423 runtime->hw_ptr_base = 0;
e7636925
JK		 1424 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1425 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1426 runtime->silence_start = runtime->status->hw_ptr;
1427 runtime->silence_filled = 0;
1428 return 0;
1429}
1430
877211f5 1431static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1432{
877211f5 1433 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1434 runtime->control->appl_ptr = runtime->status->hw_ptr;
1435 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1436 runtime->silence_size > 0)
1437 snd_pcm_playback_silence(substream, ULONG_MAX);
1438}
1439
1440static struct action_ops snd_pcm_action_reset = {
1441 .pre_action = snd_pcm_pre_reset,
1442 .do_action = snd_pcm_do_reset,
1443 .post_action = snd_pcm_post_reset
1444};
1445
877211f5 1446static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1447{
1448 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1449}
1450
1451/*
1452 * prepare ioctl
1453 */
0df63e44
TI		 1454/* we use the second argument for updating f_flags */
1455static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1456 int f_flags)
1da177e4 1457{
877211f5 1458 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1459 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1460 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1461 return -EBADFD;
1462 if (snd_pcm_running(substream))
1463 return -EBUSY;
0df63e44 1464 substream->f_flags = f_flags;
1da177e4
LT		 1465 return 0;
1466}
1467
877211f5 1468static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1469{
1470 int err;
1471 err = substream->ops->prepare(substream);
1472 if (err < 0)
1473 return err;
1474 return snd_pcm_do_reset(substream, 0);
1475}
1476
877211f5 1477static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1478{
877211f5 1479 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1480 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1481 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1482}
1483
1484static struct action_ops snd_pcm_action_prepare = {
1485 .pre_action = snd_pcm_pre_prepare,
1486 .do_action = snd_pcm_do_prepare,
1487 .post_action = snd_pcm_post_prepare
1488};
1489
1490/**
1c85cc64 1491 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1492 * @substream: the PCM substream instance
0df63e44 1493 * @file: file to refer f_flags
eb7c06e8
YB		 1494 *
1495 * Return: Zero if successful, or a negative error code.
1da177e4 1496 */
0df63e44
TI		 1497static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1498 struct file *file)
1da177e4
LT		 1499{
1500 int res;
877211f5 1501 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1502 int f_flags;
1503
1504 if (file)
1505 f_flags = file->f_flags;
1506 else
1507 f_flags = substream->f_flags;
1da177e4
LT		 1508
1509 snd_power_lock(card);
cbac4b0c 1510 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1511 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1512 substream, f_flags);
1da177e4
LT		 1513 snd_power_unlock(card);
1514 return res;
1515}
1516
1517/*
1518 * drain ioctl
1519 */
1520
877211f5 1521static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1522{
4f7c39dc
TI		 1523 struct snd_pcm_runtime *runtime = substream->runtime;
1524 switch (runtime->status->state) {
1525 case SNDRV_PCM_STATE_OPEN:
1526 case SNDRV_PCM_STATE_DISCONNECTED:
1527 case SNDRV_PCM_STATE_SUSPENDED:
1528 return -EBADFD;
1529 }
1530 runtime->trigger_master = substream;
1da177e4
LT		 1531 return 0;
1532}
1533
877211f5 1534static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1535{
877211f5 1536 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1537 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1538 switch (runtime->status->state) {
1539 case SNDRV_PCM_STATE_PREPARED:
1540 /* start playback stream if possible */
1541 if (! snd_pcm_playback_empty(substream)) {
1542 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1543 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1544 }
1545 break;
1546 case SNDRV_PCM_STATE_RUNNING:
1547 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1548 break;
4f7c39dc
TI		 1549 case SNDRV_PCM_STATE_XRUN:
1550 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1551 break;
1da177e4
LT		 1552 default:
1553 break;
1554 }
1555 } else {
1556 /* stop running stream */
1557 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1558 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1559 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1560 snd_pcm_do_stop(substream, new_state);
1561 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1562 }
1563 }
1564 return 0;
1565}
1566
877211f5 1567static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1568{
1569}
1570
1571static struct action_ops snd_pcm_action_drain_init = {
1572 .pre_action = snd_pcm_pre_drain_init,
1573 .do_action = snd_pcm_do_drain_init,
1574 .post_action = snd_pcm_post_drain_init
1575};
1576
877211f5 1577static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1578
1579/*
1580 * Drain the stream(s).
1581 * When the substream is linked, sync until the draining of all playback streams
1582 * is finished.
1583 * After this call, all streams are supposed to be either SETUP or DRAINING
1584 * (capture only) state.
1585 */
4cdc115f
TI		 1586static int snd_pcm_drain(struct snd_pcm_substream *substream,
1587 struct file *file)
1da177e4 1588{
877211f5
TI		 1589 struct snd_card *card;
1590 struct snd_pcm_runtime *runtime;
ef991b95 1591 struct snd_pcm_substream *s;
d3a7dcfe 1592 wait_queue_t wait;
1da177e4 1593 int result = 0;
4cdc115f 1594 int nonblock = 0;
1da177e4 1595
1da177e4
LT		 1596 card = substream->pcm->card;
1597 runtime = substream->runtime;
1598
1599 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1600 return -EBADFD;
1601
1da177e4
LT		 1602 snd_power_lock(card);
1603 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1604 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1605 if (result < 0) {
1606 snd_power_unlock(card);
1607 return result;
1608 }
1da177e4
LT		 1609 }
1610
4cdc115f
TI		 1611 if (file) {
1612 if (file->f_flags & O_NONBLOCK)
1613 nonblock = 1;
1614 } else if (substream->f_flags & O_NONBLOCK)
1615 nonblock = 1;
1616
21cb2a2e 1617 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1618 snd_pcm_stream_lock_irq(substream);
1619 /* resume pause */
d3a7dcfe 1620 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1621 snd_pcm_pause(substream, 0);
1622
1623 /* pre-start/stop - all running streams are changed to DRAINING state */
1624 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1625 if (result < 0)
1626 goto unlock;
1627 /* in non-blocking, we don't wait in ioctl but let caller poll */
1628 if (nonblock) {
1629 result = -EAGAIN;
1630 goto unlock;
21cb2a2e 1631 }
1da177e4
LT		 1632
1633 for (;;) {
1634 long tout;
d3a7dcfe 1635 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1636 if (signal_pending(current)) {
1637 result = -ERESTARTSYS;
1638 break;
1639 }
d3a7dcfe
TI		 1640 /* find a substream to drain */
1641 to_check = NULL;
1642 snd_pcm_group_for_each_entry(s, substream) {
1643 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1644 continue;
1645 runtime = s->runtime;
1646 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1647 to_check = runtime;
21cb2a2e 1648 break;
d3a7dcfe 1649 }
21cb2a2e 1650 }
d3a7dcfe
TI		 1651 if (!to_check)
1652 break; /* all drained */
1653 init_waitqueue_entry(&wait, current);
1654 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1655 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1656 up_read(&snd_pcm_link_rwsem);
1da177e4 1657 snd_power_unlock(card);
f2b3614c
TI		 1658 if (runtime->no_period_wakeup)
1659 tout = MAX_SCHEDULE_TIMEOUT;
1660 else {
1661 tout = 10;
1662 if (runtime->rate) {
1663 long t = runtime->period_size * 2 / runtime->rate;
1664 tout = max(t, tout);
1665 }
1666 tout = msecs_to_jiffies(tout * 1000);
1667 }
1668 tout = schedule_timeout_interruptible(tout);
1da177e4 1669 snd_power_lock(card);
d3a7dcfe 1670 down_read(&snd_pcm_link_rwsem);
1da177e4 1671 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1672 remove_wait_queue(&to_check->sleep, &wait);
0914f796
TI		 1673 if (card->shutdown) {
1674 result = -ENODEV;
1675 break;
1676 }
1da177e4
LT		 1677 if (tout == 0) {
1678 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1679 result = -ESTRPIPE;
1680 else {
09e56df8
TI		 1681 dev_dbg(substream->pcm->card->dev,
1682 "playback drain error (DMA or IRQ trouble?)\n");
1da177e4
LT		 1683 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1684 result = -EIO;
1685 }
1686 break;
1687 }
1da177e4 1688 }
21cb2a2e 1689
4cdc115f 1690 unlock:
21cb2a2e 1691 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1692 up_read(&snd_pcm_link_rwsem);
1da177e4 1693 snd_power_unlock(card);
1da177e4
LT		 1694
1695 return result;
1696}
1697
1698/*
1699 * drop ioctl
1700 *
1701 * Immediately put all linked substreams into SETUP state.
1702 */
877211f5 1703static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1704{
877211f5 1705 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1706 int result = 0;
1707
7eaa943c
TI		 1708 if (PCM_RUNTIME_CHECK(substream))
1709 return -ENXIO;
1da177e4 1710 runtime = substream->runtime;
1da177e4 1711
de1b8b93 1712 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1713 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1714 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1715 return -EBADFD;
1716
1da177e4
LT		 1717 snd_pcm_stream_lock_irq(substream);
1718 /* resume pause */
1719 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1720 snd_pcm_pause(substream, 0);
1721
1722 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1723 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1724 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1725
1da177e4
LT		 1726 return result;
1727}
1728
1729
0888c321 1730static bool is_pcm_file(struct file *file)
1da177e4 1731{
0888c321 1732 struct inode *inode = file_inode(file);
f87135f5
CL		 1733 unsigned int minor;
1734
0888c321
AV		 1735 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1736 return false;
1da177e4 1737 minor = iminor(inode);
0888c321
AV		 1738 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1739 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1da177e4
LT		 1740}
1741
1742/*
1743 * PCM link handling
1744 */
877211f5 1745static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1746{
1747 int res = 0;
877211f5
TI		 1748 struct snd_pcm_file *pcm_file;
1749 struct snd_pcm_substream *substream1;
1662591b 1750 struct snd_pcm_group *group;
0888c321 1751 struct fd f = fdget(fd);
1da177e4 1752
0888c321 1753 if (!f.file)
1da177e4 1754 return -EBADFD;
0888c321
AV		 1755 if (!is_pcm_file(f.file)) {
1756 res = -EBADFD;
1757 goto _badf;
1758 }
1759 pcm_file = f.file->private_data;
1da177e4 1760 substream1 = pcm_file->substream;
1662591b
TI		 1761 group = kmalloc(sizeof(*group), GFP_KERNEL);
1762 if (!group) {
1763 res = -ENOMEM;
1764 goto _nolock;
1765 }
1da177e4
LT		 1766 down_write(&snd_pcm_link_rwsem);
1767 write_lock_irq(&snd_pcm_link_rwlock);
1768 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
257f8cce
TI		 1769 substream->runtime->status->state != substream1->runtime->status->state ||
1770 substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1da177e4
LT		 1771 res = -EBADFD;
1772 goto _end;
1773 }
1774 if (snd_pcm_stream_linked(substream1)) {
1775 res = -EALREADY;
1776 goto _end;
1777 }
1778 if (!snd_pcm_stream_linked(substream)) {
1662591b 1779 substream->group = group;
dd6c5cd8 1780 group = NULL;
1da177e4 1781 spin_lock_init(&substream->group->lock);
257f8cce 1782 mutex_init(&substream->group->mutex);
1da177e4
LT		 1783 INIT_LIST_HEAD(&substream->group->substreams);
1784 list_add_tail(&substream->link_list, &substream->group->substreams);
1785 substream->group->count = 1;
1786 }
1787 list_add_tail(&substream1->link_list, &substream->group->substreams);
1788 substream->group->count++;
1789 substream1->group = substream->group;
1790 _end:
1791 write_unlock_irq(&snd_pcm_link_rwlock);
1792 up_write(&snd_pcm_link_rwsem);
1662591b 1793 _nolock:
a0830dbd 1794 snd_card_unref(substream1->pcm->card);
dd6c5cd8 1795 kfree(group);
0888c321
AV		 1796 _badf:
1797 fdput(f);
1da177e4
LT		 1798 return res;
1799}
1800
877211f5 1801static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1802{
1803 substream->group = &substream->self_group;
1804 INIT_LIST_HEAD(&substream->self_group.substreams);
1805 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1806}
1807
877211f5 1808static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1809{
ef991b95 1810 struct snd_pcm_substream *s;
1da177e4
LT		 1811 int res = 0;
1812
1813 down_write(&snd_pcm_link_rwsem);
1814 write_lock_irq(&snd_pcm_link_rwlock);
1815 if (!snd_pcm_stream_linked(substream)) {
1816 res = -EALREADY;
1817 goto _end;
1818 }
1819 list_del(&substream->link_list);
1820 substream->group->count--;
1821 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1822 snd_pcm_group_for_each_entry(s, substream) {
1823 relink_to_local(s);
1da177e4
LT		 1824 break;
1825 }
1826 kfree(substream->group);
1827 }
1828 relink_to_local(substream);
1829 _end:
1830 write_unlock_irq(&snd_pcm_link_rwlock);
1831 up_write(&snd_pcm_link_rwsem);
1832 return res;
1833}
1834
1835/*
1836 * hw configurator
1837 */
877211f5
TI		 1838static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1839 struct snd_pcm_hw_rule *rule)
1da177e4 1840{
877211f5 1841 struct snd_interval t;
1da177e4
LT		 1842 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1843 hw_param_interval_c(params, rule->deps[1]), &t);
1844 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1845}
1846
877211f5
TI		 1847static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1848 struct snd_pcm_hw_rule *rule)
1da177e4 1849{
877211f5 1850 struct snd_interval t;
1da177e4
LT		 1851 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1852 hw_param_interval_c(params, rule->deps[1]), &t);
1853 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1854}
1855
877211f5
TI		 1856static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1857 struct snd_pcm_hw_rule *rule)
1da177e4 1858{
877211f5 1859 struct snd_interval t;
1da177e4
LT		 1860 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1861 hw_param_interval_c(params, rule->deps[1]),
1862 (unsigned long) rule->private, &t);
1863 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1864}
1865
877211f5
TI		 1866static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1867 struct snd_pcm_hw_rule *rule)
1da177e4 1868{
877211f5 1869 struct snd_interval t;
1da177e4
LT		 1870 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1871 (unsigned long) rule->private,
1872 hw_param_interval_c(params, rule->deps[1]), &t);
1873 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1874}
1875
877211f5
TI		 1876static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1877 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1878{
1879 unsigned int k;
877211f5
TI		 1880 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1881 struct snd_mask m;
1882 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1883 snd_mask_any(&m);
1884 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1885 int bits;
1886 if (! snd_mask_test(mask, k))
1887 continue;
1888 bits = snd_pcm_format_physical_width(k);
1889 if (bits <= 0)
1890 continue; /* ignore invalid formats */
1891 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1892 snd_mask_reset(&m, k);
1893 }
1894 return snd_mask_refine(mask, &m);
1895}
1896
877211f5
TI		 1897static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1898 struct snd_pcm_hw_rule *rule)
1da177e4 1899{
877211f5 1900 struct snd_interval t;
1da177e4
LT		 1901 unsigned int k;
1902 t.min = UINT_MAX;
1903 t.max = 0;
1904 t.openmin = 0;
1905 t.openmax = 0;
1906 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1907 int bits;
1908 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1909 continue;
1910 bits = snd_pcm_format_physical_width(k);
1911 if (bits <= 0)
1912 continue; /* ignore invalid formats */
1913 if (t.min > (unsigned)bits)
1914 t.min = bits;
1915 if (t.max < (unsigned)bits)
1916 t.max = bits;
1917 }
1918 t.integer = 1;
1919 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1920}
1921
1922#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1923#error "Change this table"
1924#endif
1925
1926static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1927 48000, 64000, 88200, 96000, 176400, 192000 };
1928
7653d557
CL		 1929const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1930 .count = ARRAY_SIZE(rates),
1931 .list = rates,
1932};
1933
877211f5
TI		 1934static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1935 struct snd_pcm_hw_rule *rule)
1da177e4 1936{
877211f5 1937 struct snd_pcm_hardware *hw = rule->private;
1da177e4 1938 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 1939 snd_pcm_known_rates.count,
1940 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 1941}
1942
877211f5
TI		 1943static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1944 struct snd_pcm_hw_rule *rule)
1da177e4 1945{
877211f5
TI		 1946 struct snd_interval t;
1947 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1948 t.min = 0;
1949 t.max = substream->buffer_bytes_max;
1950 t.openmin = 0;
1951 t.openmax = 0;
1952 t.integer = 1;
1953 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1954}
1955
877211f5 1956int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1957{
877211f5
TI		 1958 struct snd_pcm_runtime *runtime = substream->runtime;
1959 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1960 int k, err;
1961
1962 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1963 snd_mask_any(constrs_mask(constrs, k));
1964 }
1965
1966 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1967 snd_interval_any(constrs_interval(constrs, k));
1968 }
1969
1970 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1971 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1972 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1973 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1974 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1975
1976 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1977 snd_pcm_hw_rule_format, NULL,
1978 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1979 if (err < 0)
1980 return err;
1981 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1982 snd_pcm_hw_rule_sample_bits, NULL,
1983 SNDRV_PCM_HW_PARAM_FORMAT,
1984 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1985 if (err < 0)
1986 return err;
1987 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1988 snd_pcm_hw_rule_div, NULL,
1989 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1990 if (err < 0)
1991 return err;
1992 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1993 snd_pcm_hw_rule_mul, NULL,
1994 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1995 if (err < 0)
1996 return err;
1997 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1998 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1999 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2000 if (err < 0)
2001 return err;
2002 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2003 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2004 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2005 if (err < 0)
2006 return err;
2007 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2008 snd_pcm_hw_rule_div, NULL,
2009 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2010 if (err < 0)
2011 return err;
2012 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2013 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2014 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2015 if (err < 0)
2016 return err;
2017 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2018 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2019 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2020 if (err < 0)
2021 return err;
2022 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2023 snd_pcm_hw_rule_div, NULL,
2024 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2025 if (err < 0)
2026 return err;
2027 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2028 snd_pcm_hw_rule_div, NULL,
2029 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2030 if (err < 0)
2031 return err;
2032 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2033 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2034 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2035 if (err < 0)
2036 return err;
2037 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2038 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2039 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2040 if (err < 0)
2041 return err;
2042 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2043 snd_pcm_hw_rule_mul, NULL,
2044 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2045 if (err < 0)
2046 return err;
2047 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2048 snd_pcm_hw_rule_mulkdiv, (void*) 8,
2049 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2050 if (err < 0)
2051 return err;
2052 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2053 snd_pcm_hw_rule_muldivk, (void*) 1000000,
2054 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2055 if (err < 0)
2056 return err;
2057 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2058 snd_pcm_hw_rule_muldivk, (void*) 8,
2059 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2060 if (err < 0)
2061 return err;
2062 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2063 snd_pcm_hw_rule_muldivk, (void*) 8,
2064 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2065 if (err < 0)
2066 return err;
2067 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2068 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2069 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2070 if (err < 0)
2071 return err;
2072 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2073 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2074 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2075 if (err < 0)
2076 return err;
2077 return 0;
2078}
2079
877211f5 2080int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 2081{
877211f5
TI		 2082 struct snd_pcm_runtime *runtime = substream->runtime;
2083 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 2084 int err;
2085 unsigned int mask = 0;
2086
2087 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2088 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2089 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2090 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
63825f3a 2091 if (hw_support_mmap(substream)) {
1da177e4
LT		 2092 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2093 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2094 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2095 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2096 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2097 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2098 }
2099 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 2100 if (err < 0)
2101 return err;
1da177e4
LT		 2102
2103 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 2104 if (err < 0)
2105 return err;
1da177e4
LT		 2106
2107 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 2108 if (err < 0)
2109 return err;
1da177e4
LT		 2110
2111 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2112 hw->channels_min, hw->channels_max);
7eaa943c
TI		 2113 if (err < 0)
2114 return err;
1da177e4
LT		 2115
2116 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2117 hw->rate_min, hw->rate_max);
8b90ca08
GL		 2118 if (err < 0)
2119 return err;
1da177e4
LT		 2120
2121 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2122 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 2123 if (err < 0)
2124 return err;
1da177e4
LT		 2125
2126 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2127 hw->periods_min, hw->periods_max);
7eaa943c
TI		 2128 if (err < 0)
2129 return err;
1da177e4
LT		 2130
2131 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2132 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 2133 if (err < 0)
2134 return err;
1da177e4
LT		 2135
2136 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2137 snd_pcm_hw_rule_buffer_bytes_max, substream,
2138 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2139 if (err < 0)
2140 return err;
2141
2142 /* FIXME: remove */
2143 if (runtime->dma_bytes) {
2144 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c 2145 if (err < 0)
6cf95152 2146 return err;
1da177e4
LT		 2147 }
2148
2149 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2150 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2151 snd_pcm_hw_rule_rate, hw,
2152 SNDRV_PCM_HW_PARAM_RATE, -1);
2153 if (err < 0)
2154 return err;
2155 }
2156
2157 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2158 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2159
2160 return 0;
2161}
2162
3bf75f9b 2163static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2164{
1da177e4 2165 snd_pcm_unlink(substream);
3bf75f9b
TI		 2166}
2167
2168void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2169{
0df63e44
TI		 2170 substream->ref_count--;
2171 if (substream->ref_count > 0)
2172 return;
2173
3bf75f9b 2174 snd_pcm_drop(substream);
3bf75f9b 2175 if (substream->hw_opened) {
1da177e4
LT		 2176 if (substream->ops->hw_free != NULL)
2177 substream->ops->hw_free(substream);
2178 substream->ops->close(substream);
3bf75f9b 2179 substream->hw_opened = 0;
1da177e4 2180 }
8699a0b6
TI		 2181 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2182 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2183 if (substream->pcm_release) {
2184 substream->pcm_release(substream);
2185 substream->pcm_release = NULL;
2186 }
3bf75f9b
TI		 2187 snd_pcm_detach_substream(substream);
2188}
2189
e88e8ae6
TI		 2190EXPORT_SYMBOL(snd_pcm_release_substream);
2191
3bf75f9b
TI		 2192int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2193 struct file *file,
2194 struct snd_pcm_substream **rsubstream)
2195{
2196 struct snd_pcm_substream *substream;
2197 int err;
2198
2199 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2200 if (err < 0)
2201 return err;
0df63e44
TI		 2202 if (substream->ref_count > 1) {
2203 *rsubstream = substream;
2204 return 0;
2205 }
2206
3bf75f9b
TI		 2207 err = snd_pcm_hw_constraints_init(substream);
2208 if (err < 0) {
09e56df8 2209 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
3bf75f9b
TI		 2210 goto error;
2211 }
2212
2213 if ((err = substream->ops->open(substream)) < 0)
2214 goto error;
2215
2216 substream->hw_opened = 1;
2217
2218 err = snd_pcm_hw_constraints_complete(substream);
2219 if (err < 0) {
09e56df8 2220 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
3bf75f9b
TI		 2221 goto error;
2222 }
2223
2224 *rsubstream = substream;
1da177e4 2225 return 0;
3bf75f9b
TI		 2226
2227 error:
2228 snd_pcm_release_substream(substream);
2229 return err;
1da177e4
LT		 2230}
2231
e88e8ae6
TI		 2232EXPORT_SYMBOL(snd_pcm_open_substream);
2233
1da177e4 2234static int snd_pcm_open_file(struct file *file,
877211f5 2235 struct snd_pcm *pcm,
ffd3d5c6 2236 int stream)
1da177e4 2237{
877211f5
TI		 2238 struct snd_pcm_file *pcm_file;
2239 struct snd_pcm_substream *substream;
3bf75f9b 2240 int err;
1da177e4 2241
3bf75f9b
TI		 2242 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2243 if (err < 0)
2244 return err;
2245
548a648b
TI		 2246 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2247 if (pcm_file == NULL) {
2248 snd_pcm_release_substream(substream);
2249 return -ENOMEM;
2250 }
2251 pcm_file->substream = substream;
2252 if (substream->ref_count == 1) {
0df63e44
TI		 2253 substream->file = pcm_file;
2254 substream->pcm_release = pcm_release_private;
1da177e4 2255 }
1da177e4 2256 file->private_data = pcm_file;
ffd3d5c6 2257
1da177e4
LT		 2258 return 0;
2259}
2260
f87135f5
CL		 2261static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2262{
2263 struct snd_pcm *pcm;
02f4865f
TI		 2264 int err = nonseekable_open(inode, file);
2265 if (err < 0)
2266 return err;
f87135f5
CL		 2267 pcm = snd_lookup_minor_data(iminor(inode),
2268 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd 2269 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
8bb4d9ce
TI		 2270 if (pcm)
2271 snd_card_unref(pcm->card);
a0830dbd 2272 return err;
f87135f5
CL		 2273}
2274
2275static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2276{
877211f5 2277 struct snd_pcm *pcm;
02f4865f
TI		 2278 int err = nonseekable_open(inode, file);
2279 if (err < 0)
2280 return err;
f87135f5
CL		 2281 pcm = snd_lookup_minor_data(iminor(inode),
2282 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd 2283 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
8bb4d9ce
TI		 2284 if (pcm)
2285 snd_card_unref(pcm->card);
a0830dbd 2286 return err;
f87135f5
CL		 2287}
2288
2289static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2290{
2291 int err;
1da177e4
LT		 2292 wait_queue_t wait;
2293
1da177e4
LT		 2294 if (pcm == NULL) {
2295 err = -ENODEV;
2296 goto __error1;
2297 }
2298 err = snd_card_file_add(pcm->card, file);
2299 if (err < 0)
2300 goto __error1;
2301 if (!try_module_get(pcm->card->module)) {
2302 err = -EFAULT;
2303 goto __error2;
2304 }
2305 init_waitqueue_entry(&wait, current);
2306 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2307 mutex_lock(&pcm->open_mutex);
1da177e4 2308 while (1) {
ffd3d5c6 2309 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2310 if (err >= 0)
2311 break;
2312 if (err == -EAGAIN) {
2313 if (file->f_flags & O_NONBLOCK) {
2314 err = -EBUSY;
2315 break;
2316 }
2317 } else
2318 break;
2319 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2320 mutex_unlock(&pcm->open_mutex);
1da177e4 2321 schedule();
1a60d4c5 2322 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2323 if (pcm->card->shutdown) {
2324 err = -ENODEV;
2325 break;
2326 }
1da177e4
LT		 2327 if (signal_pending(current)) {
2328 err = -ERESTARTSYS;
2329 break;
2330 }
2331 }
2332 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2333 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2334 if (err < 0)
2335 goto __error;
2336 return err;
2337
2338 __error:
2339 module_put(pcm->card->module);
2340 __error2:
2341 snd_card_file_remove(pcm->card, file);
2342 __error1:
2343 return err;
2344}
2345
2346static int snd_pcm_release(struct inode *inode, struct file *file)
2347{
877211f5
TI		 2348 struct snd_pcm *pcm;
2349 struct snd_pcm_substream *substream;
2350 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2351
2352 pcm_file = file->private_data;
2353 substream = pcm_file->substream;
7eaa943c
TI		 2354 if (snd_BUG_ON(!substream))
2355 return -ENXIO;
1da177e4 2356 pcm = substream->pcm;
1a60d4c5 2357 mutex_lock(&pcm->open_mutex);
3bf75f9b 2358 snd_pcm_release_substream(substream);
548a648b 2359 kfree(pcm_file);
1a60d4c5 2360 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2361 wake_up(&pcm->open_wait);
2362 module_put(pcm->card->module);
2363 snd_card_file_remove(pcm->card, file);
2364 return 0;
2365}
2366
877211f5
TI		 2367static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2368 snd_pcm_uframes_t frames)
1da177e4 2369{
877211f5 2370 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2371 snd_pcm_sframes_t appl_ptr;
2372 snd_pcm_sframes_t ret;
2373 snd_pcm_sframes_t hw_avail;
2374
2375 if (frames == 0)
2376 return 0;
2377
2378 snd_pcm_stream_lock_irq(substream);
2379 switch (runtime->status->state) {
2380 case SNDRV_PCM_STATE_PREPARED:
2381 break;
2382 case SNDRV_PCM_STATE_DRAINING:
2383 case SNDRV_PCM_STATE_RUNNING:
2384 if (snd_pcm_update_hw_ptr(substream) >= 0)
2385 break;
2386 /* Fall through */
2387 case SNDRV_PCM_STATE_XRUN:
2388 ret = -EPIPE;
2389 goto __end;
51840409
LR		 2390 case SNDRV_PCM_STATE_SUSPENDED:
2391 ret = -ESTRPIPE;
2392 goto __end;
1da177e4
LT		 2393 default:
2394 ret = -EBADFD;
2395 goto __end;
2396 }
2397
2398 hw_avail = snd_pcm_playback_hw_avail(runtime);
2399 if (hw_avail <= 0) {
2400 ret = 0;
2401 goto __end;
2402 }
2403 if (frames > (snd_pcm_uframes_t)hw_avail)
2404 frames = hw_avail;
1da177e4
LT		 2405 appl_ptr = runtime->control->appl_ptr - frames;
2406 if (appl_ptr < 0)
2407 appl_ptr += runtime->boundary;
2408 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2409 ret = frames;
2410 __end:
2411 snd_pcm_stream_unlock_irq(substream);
2412 return ret;
2413}
2414
877211f5
TI		 2415static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2416 snd_pcm_uframes_t frames)
1da177e4 2417{
877211f5 2418 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2419 snd_pcm_sframes_t appl_ptr;
2420 snd_pcm_sframes_t ret;
2421 snd_pcm_sframes_t hw_avail;
2422
2423 if (frames == 0)
2424 return 0;
2425
2426 snd_pcm_stream_lock_irq(substream);
2427 switch (runtime->status->state) {
2428 case SNDRV_PCM_STATE_PREPARED:
2429 case SNDRV_PCM_STATE_DRAINING:
2430 break;
2431 case SNDRV_PCM_STATE_RUNNING:
2432 if (snd_pcm_update_hw_ptr(substream) >= 0)
2433 break;
2434 /* Fall through */
2435 case SNDRV_PCM_STATE_XRUN:
2436 ret = -EPIPE;
2437 goto __end;
51840409
LR		 2438 case SNDRV_PCM_STATE_SUSPENDED:
2439 ret = -ESTRPIPE;
2440 goto __end;
1da177e4
LT		 2441 default:
2442 ret = -EBADFD;
2443 goto __end;
2444 }
2445
2446 hw_avail = snd_pcm_capture_hw_avail(runtime);
2447 if (hw_avail <= 0) {
2448 ret = 0;
2449 goto __end;
2450 }
2451 if (frames > (snd_pcm_uframes_t)hw_avail)
2452 frames = hw_avail;
1da177e4
LT		 2453 appl_ptr = runtime->control->appl_ptr - frames;
2454 if (appl_ptr < 0)
2455 appl_ptr += runtime->boundary;
2456 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2457 ret = frames;
2458 __end:
2459 snd_pcm_stream_unlock_irq(substream);
2460 return ret;
2461}
2462
877211f5
TI		 2463static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2464 snd_pcm_uframes_t frames)
1da177e4 2465{
877211f5 2466 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2467 snd_pcm_sframes_t appl_ptr;
2468 snd_pcm_sframes_t ret;
2469 snd_pcm_sframes_t avail;
2470
2471 if (frames == 0)
2472 return 0;
2473
2474 snd_pcm_stream_lock_irq(substream);
2475 switch (runtime->status->state) {
2476 case SNDRV_PCM_STATE_PREPARED:
2477 case SNDRV_PCM_STATE_PAUSED:
2478 break;
2479 case SNDRV_PCM_STATE_DRAINING:
2480 case SNDRV_PCM_STATE_RUNNING:
2481 if (snd_pcm_update_hw_ptr(substream) >= 0)
2482 break;
2483 /* Fall through */
2484 case SNDRV_PCM_STATE_XRUN:
2485 ret = -EPIPE;
2486 goto __end;
51840409
LR		 2487 case SNDRV_PCM_STATE_SUSPENDED:
2488 ret = -ESTRPIPE;
2489 goto __end;
1da177e4
LT		 2490 default:
2491 ret = -EBADFD;
2492 goto __end;
2493 }
2494
2495 avail = snd_pcm_playback_avail(runtime);
2496 if (avail <= 0) {
2497 ret = 0;
2498 goto __end;
2499 }
2500 if (frames > (snd_pcm_uframes_t)avail)
2501 frames = avail;
1da177e4
LT		 2502 appl_ptr = runtime->control->appl_ptr + frames;
2503 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2504 appl_ptr -= runtime->boundary;
2505 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2506 ret = frames;
2507 __end:
2508 snd_pcm_stream_unlock_irq(substream);
2509 return ret;
2510}
2511
877211f5
TI		 2512static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2513 snd_pcm_uframes_t frames)
1da177e4 2514{
877211f5 2515 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2516 snd_pcm_sframes_t appl_ptr;
2517 snd_pcm_sframes_t ret;
2518 snd_pcm_sframes_t avail;
2519
2520 if (frames == 0)
2521 return 0;
2522
2523 snd_pcm_stream_lock_irq(substream);
2524 switch (runtime->status->state) {
2525 case SNDRV_PCM_STATE_PREPARED:
2526 case SNDRV_PCM_STATE_DRAINING:
2527 case SNDRV_PCM_STATE_PAUSED:
2528 break;
2529 case SNDRV_PCM_STATE_RUNNING:
2530 if (snd_pcm_update_hw_ptr(substream) >= 0)
2531 break;
2532 /* Fall through */
2533 case SNDRV_PCM_STATE_XRUN:
2534 ret = -EPIPE;
2535 goto __end;
51840409
LR		 2536 case SNDRV_PCM_STATE_SUSPENDED:
2537 ret = -ESTRPIPE;
2538 goto __end;
1da177e4
LT		 2539 default:
2540 ret = -EBADFD;
2541 goto __end;
2542 }
2543
2544 avail = snd_pcm_capture_avail(runtime);
2545 if (avail <= 0) {
2546 ret = 0;
2547 goto __end;
2548 }
2549 if (frames > (snd_pcm_uframes_t)avail)
2550 frames = avail;
1da177e4
LT		 2551 appl_ptr = runtime->control->appl_ptr + frames;
2552 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2553 appl_ptr -= runtime->boundary;
2554 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2555 ret = frames;
2556 __end:
2557 snd_pcm_stream_unlock_irq(substream);
2558 return ret;
2559}
2560
877211f5 2561static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2562{
877211f5 2563 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2564 int err;
2565
2566 snd_pcm_stream_lock_irq(substream);
2567 switch (runtime->status->state) {
2568 case SNDRV_PCM_STATE_DRAINING:
2569 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2570 goto __badfd;
1f96153b 2571 /* Fall through */
1da177e4
LT		 2572 case SNDRV_PCM_STATE_RUNNING:
2573 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2574 break;
2575 /* Fall through */
2576 case SNDRV_PCM_STATE_PREPARED:
2577 case SNDRV_PCM_STATE_SUSPENDED:
2578 err = 0;
2579 break;
2580 case SNDRV_PCM_STATE_XRUN:
2581 err = -EPIPE;
2582 break;
2583 default:
2584 __badfd:
2585 err = -EBADFD;
2586 break;
2587 }
2588 snd_pcm_stream_unlock_irq(substream);
2589 return err;
2590}
2591
877211f5
TI		 2592static int snd_pcm_delay(struct snd_pcm_substream *substream,
2593 snd_pcm_sframes_t __user *res)
1da177e4 2594{
877211f5 2595 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2596 int err;
2597 snd_pcm_sframes_t n = 0;
2598
2599 snd_pcm_stream_lock_irq(substream);
2600 switch (runtime->status->state) {
2601 case SNDRV_PCM_STATE_DRAINING:
2602 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2603 goto __badfd;
1f96153b 2604 /* Fall through */
1da177e4
LT		 2605 case SNDRV_PCM_STATE_RUNNING:
2606 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2607 break;
2608 /* Fall through */
2609 case SNDRV_PCM_STATE_PREPARED:
2610 case SNDRV_PCM_STATE_SUSPENDED:
2611 err = 0;
2612 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2613 n = snd_pcm_playback_hw_avail(runtime);
2614 else
2615 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2616 n += runtime->delay;
1da177e4
LT		 2617 break;
2618 case SNDRV_PCM_STATE_XRUN:
2619 err = -EPIPE;
2620 break;
2621 default:
2622 __badfd:
2623 err = -EBADFD;
2624 break;
2625 }
2626 snd_pcm_stream_unlock_irq(substream);
2627 if (!err)
2628 if (put_user(n, res))
2629 err = -EFAULT;
2630 return err;
2631}
2632
877211f5
TI		 2633static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2634 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2635{
877211f5
TI		 2636 struct snd_pcm_runtime *runtime = substream->runtime;
2637 struct snd_pcm_sync_ptr sync_ptr;
2638 volatile struct snd_pcm_mmap_status *status;
2639 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2640 int err;
2641
2642 memset(&sync_ptr, 0, sizeof(sync_ptr));
2643 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2644 return -EFAULT;
877211f5 2645 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2646 return -EFAULT;
2647 status = runtime->status;
2648 control = runtime->control;
2649 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2650 err = snd_pcm_hwsync(substream);
2651 if (err < 0)
2652 return err;
2653 }
2654 snd_pcm_stream_lock_irq(substream);
2655 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2656 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2657 else
2658 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2659 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2660 control->avail_min = sync_ptr.c.control.avail_min;
2661 else
2662 sync_ptr.c.control.avail_min = control->avail_min;
2663 sync_ptr.s.status.state = status->state;
2664 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2665 sync_ptr.s.status.tstamp = status->tstamp;
2666 sync_ptr.s.status.suspended_state = status->suspended_state;
2667 snd_pcm_stream_unlock_irq(substream);
2668 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2669 return -EFAULT;
2670 return 0;
2671}
b751eef1
JK		 2672
2673static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2674{
2675 struct snd_pcm_runtime *runtime = substream->runtime;
2676 int arg;
2677
2678 if (get_user(arg, _arg))
2679 return -EFAULT;
2680 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2681 return -EINVAL;
2408c219 2682 runtime->tstamp_type = arg;
b751eef1
JK		 2683 return 0;
2684}
1da177e4 2685
0df63e44
TI		 2686static int snd_pcm_common_ioctl1(struct file *file,
2687 struct snd_pcm_substream *substream,
1da177e4
LT		 2688 unsigned int cmd, void __user *arg)
2689{
1da177e4
LT		 2690 switch (cmd) {
2691 case SNDRV_PCM_IOCTL_PVERSION:
2692 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2693 case SNDRV_PCM_IOCTL_INFO:
2694 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2695 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2696 return 0;
b751eef1
JK		 2697 case SNDRV_PCM_IOCTL_TTSTAMP:
2698 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2699 case SNDRV_PCM_IOCTL_HW_REFINE:
2700 return snd_pcm_hw_refine_user(substream, arg);
2701 case SNDRV_PCM_IOCTL_HW_PARAMS:
2702 return snd_pcm_hw_params_user(substream, arg);
2703 case SNDRV_PCM_IOCTL_HW_FREE:
2704 return snd_pcm_hw_free(substream);
2705 case SNDRV_PCM_IOCTL_SW_PARAMS:
2706 return snd_pcm_sw_params_user(substream, arg);
2707 case SNDRV_PCM_IOCTL_STATUS:
2708 return snd_pcm_status_user(substream, arg);
2709 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2710 return snd_pcm_channel_info_user(substream, arg);
2711 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2712 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2713 case SNDRV_PCM_IOCTL_RESET:
2714 return snd_pcm_reset(substream);
2715 case SNDRV_PCM_IOCTL_START:
2716 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2717 case SNDRV_PCM_IOCTL_LINK:
2718 return snd_pcm_link(substream, (int)(unsigned long) arg);
2719 case SNDRV_PCM_IOCTL_UNLINK:
2720 return snd_pcm_unlink(substream);
2721 case SNDRV_PCM_IOCTL_RESUME:
2722 return snd_pcm_resume(substream);
2723 case SNDRV_PCM_IOCTL_XRUN:
2724 return snd_pcm_xrun(substream);
2725 case SNDRV_PCM_IOCTL_HWSYNC:
2726 return snd_pcm_hwsync(substream);
2727 case SNDRV_PCM_IOCTL_DELAY:
2728 return snd_pcm_delay(substream, arg);
2729 case SNDRV_PCM_IOCTL_SYNC_PTR:
2730 return snd_pcm_sync_ptr(substream, arg);
59d48582 2731#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2732 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2733 return snd_pcm_hw_refine_old_user(substream, arg);
2734 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2735 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2736#endif
1da177e4 2737 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2738 return snd_pcm_drain(substream, file);
1da177e4
LT		 2739 case SNDRV_PCM_IOCTL_DROP:
2740 return snd_pcm_drop(substream);
e661d0dd
TI		 2741 case SNDRV_PCM_IOCTL_PAUSE:
2742 {
2743 int res;
2744 snd_pcm_stream_lock_irq(substream);
2745 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2746 snd_pcm_stream_unlock_irq(substream);
2747 return res;
2748 }
1da177e4 2749 }
09e56df8 2750 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
1da177e4
LT		 2751 return -ENOTTY;
2752}
2753
0df63e44
TI		 2754static int snd_pcm_playback_ioctl1(struct file *file,
2755 struct snd_pcm_substream *substream,
1da177e4
LT		 2756 unsigned int cmd, void __user *arg)
2757{
7eaa943c
TI		 2758 if (snd_BUG_ON(!substream))
2759 return -ENXIO;
2760 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2761 return -EINVAL;
1da177e4
LT		 2762 switch (cmd) {
2763 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2764 {
877211f5
TI		 2765 struct snd_xferi xferi;
2766 struct snd_xferi __user *_xferi = arg;
2767 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2768 snd_pcm_sframes_t result;
2769 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2770 return -EBADFD;
2771 if (put_user(0, &_xferi->result))
2772 return -EFAULT;
2773 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2774 return -EFAULT;
2775 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2776 __put_user(result, &_xferi->result);
2777 return result < 0 ? result : 0;
2778 }
2779 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2780 {
877211f5
TI		 2781 struct snd_xfern xfern;
2782 struct snd_xfern __user *_xfern = arg;
2783 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2784 void __user **bufs;
2785 snd_pcm_sframes_t result;
2786 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2787 return -EBADFD;
2788 if (runtime->channels > 128)
2789 return -EINVAL;
2790 if (put_user(0, &_xfern->result))
2791 return -EFAULT;
2792 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2793 return -EFAULT;
ef44a1ec
LZ		 2794
2795 bufs = memdup_user(xfern.bufs,
2796 sizeof(void *) * runtime->channels);
2797 if (IS_ERR(bufs))
2798 return PTR_ERR(bufs);
1da177e4
LT		 2799 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2800 kfree(bufs);
2801 __put_user(result, &_xfern->result);
2802 return result < 0 ? result : 0;
2803 }
2804 case SNDRV_PCM_IOCTL_REWIND:
2805 {
2806 snd_pcm_uframes_t frames;
2807 snd_pcm_uframes_t __user *_frames = arg;
2808 snd_pcm_sframes_t result;
2809 if (get_user(frames, _frames))
2810 return -EFAULT;
2811 if (put_user(0, _frames))
2812 return -EFAULT;
2813 result = snd_pcm_playback_rewind(substream, frames);
2814 __put_user(result, _frames);
2815 return result < 0 ? result : 0;
2816 }
2817 case SNDRV_PCM_IOCTL_FORWARD:
2818 {
2819 snd_pcm_uframes_t frames;
2820 snd_pcm_uframes_t __user *_frames = arg;
2821 snd_pcm_sframes_t result;
2822 if (get_user(frames, _frames))
2823 return -EFAULT;
2824 if (put_user(0, _frames))
2825 return -EFAULT;
2826 result = snd_pcm_playback_forward(substream, frames);
2827 __put_user(result, _frames);
2828 return result < 0 ? result : 0;
2829 }
1da177e4 2830 }
0df63e44 2831 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2832}
2833
0df63e44
TI		 2834static int snd_pcm_capture_ioctl1(struct file *file,
2835 struct snd_pcm_substream *substream,
1da177e4
LT		 2836 unsigned int cmd, void __user *arg)
2837{
7eaa943c
TI		 2838 if (snd_BUG_ON(!substream))
2839 return -ENXIO;
2840 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2841 return -EINVAL;
1da177e4
LT		 2842 switch (cmd) {
2843 case SNDRV_PCM_IOCTL_READI_FRAMES:
2844 {
877211f5
TI		 2845 struct snd_xferi xferi;
2846 struct snd_xferi __user *_xferi = arg;
2847 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2848 snd_pcm_sframes_t result;
2849 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2850 return -EBADFD;
2851 if (put_user(0, &_xferi->result))
2852 return -EFAULT;
2853 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2854 return -EFAULT;
2855 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2856 __put_user(result, &_xferi->result);
2857 return result < 0 ? result : 0;
2858 }
2859 case SNDRV_PCM_IOCTL_READN_FRAMES:
2860 {
877211f5
TI		 2861 struct snd_xfern xfern;
2862 struct snd_xfern __user *_xfern = arg;
2863 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2864 void *bufs;
2865 snd_pcm_sframes_t result;
2866 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2867 return -EBADFD;
2868 if (runtime->channels > 128)
2869 return -EINVAL;
2870 if (put_user(0, &_xfern->result))
2871 return -EFAULT;
2872 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2873 return -EFAULT;
ef44a1ec
LZ		 2874
2875 bufs = memdup_user(xfern.bufs,
2876 sizeof(void *) * runtime->channels);
2877 if (IS_ERR(bufs))
2878 return PTR_ERR(bufs);
1da177e4
LT		 2879 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2880 kfree(bufs);
2881 __put_user(result, &_xfern->result);
2882 return result < 0 ? result : 0;
2883 }
2884 case SNDRV_PCM_IOCTL_REWIND:
2885 {
2886 snd_pcm_uframes_t frames;
2887 snd_pcm_uframes_t __user *_frames = arg;
2888 snd_pcm_sframes_t result;
2889 if (get_user(frames, _frames))
2890 return -EFAULT;
2891 if (put_user(0, _frames))
2892 return -EFAULT;
2893 result = snd_pcm_capture_rewind(substream, frames);
2894 __put_user(result, _frames);
2895 return result < 0 ? result : 0;
2896 }
2897 case SNDRV_PCM_IOCTL_FORWARD:
2898 {
2899 snd_pcm_uframes_t frames;
2900 snd_pcm_uframes_t __user *_frames = arg;
2901 snd_pcm_sframes_t result;
2902 if (get_user(frames, _frames))
2903 return -EFAULT;
2904 if (put_user(0, _frames))
2905 return -EFAULT;
2906 result = snd_pcm_capture_forward(substream, frames);
2907 __put_user(result, _frames);
2908 return result < 0 ? result : 0;
2909 }
2910 }
0df63e44 2911 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2912}
2913
877211f5
TI		 2914static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2915 unsigned long arg)
1da177e4 2916{
877211f5 2917 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2918
2919 pcm_file = file->private_data;
2920
2921 if (((cmd >> 8) & 0xff) != 'A')
2922 return -ENOTTY;
2923
0df63e44
TI		 2924 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2925 (void __user *)arg);
1da177e4
LT		 2926}
2927
877211f5
TI		 2928static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2929 unsigned long arg)
1da177e4 2930{
877211f5 2931 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2932
2933 pcm_file = file->private_data;
2934
2935 if (((cmd >> 8) & 0xff) != 'A')
2936 return -ENOTTY;
2937
0df63e44
TI		 2938 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2939 (void __user *)arg);
1da177e4
LT		 2940}
2941
bf1bbb5a
TI		 2942int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2943 unsigned int cmd, void *arg)
1da177e4
LT		 2944{
2945 mm_segment_t fs;
2946 int result;
2947
2948 fs = snd_enter_user();
1da177e4
LT		 2949 switch (substream->stream) {
2950 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2951 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2952 (void __user *)arg);
bf1bbb5a 2953 break;
1da177e4 2954 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2955 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2956 (void __user *)arg);
bf1bbb5a 2957 break;
1da177e4 2958 default:
bf1bbb5a
TI		 2959 result = -EINVAL;
2960 break;
1da177e4 2961 }
bf1bbb5a
TI		 2962 snd_leave_user(fs);
2963 return result;
1da177e4
LT		 2964}
2965
e88e8ae6
TI		 2966EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2967
877211f5
TI		 2968static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2969 loff_t * offset)
1da177e4 2970{
877211f5
TI		 2971 struct snd_pcm_file *pcm_file;
2972 struct snd_pcm_substream *substream;
2973 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2974 snd_pcm_sframes_t result;
2975
2976 pcm_file = file->private_data;
2977 substream = pcm_file->substream;
7eaa943c
TI		 2978 if (PCM_RUNTIME_CHECK(substream))
2979 return -ENXIO;
1da177e4
LT		 2980 runtime = substream->runtime;
2981 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2982 return -EBADFD;
2983 if (!frame_aligned(runtime, count))
2984 return -EINVAL;
2985 count = bytes_to_frames(runtime, count);
2986 result = snd_pcm_lib_read(substream, buf, count);
2987 if (result > 0)
2988 result = frames_to_bytes(runtime, result);
2989 return result;
2990}
2991
877211f5
TI		 2992static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2993 size_t count, loff_t * offset)
1da177e4 2994{
877211f5
TI		 2995 struct snd_pcm_file *pcm_file;
2996 struct snd_pcm_substream *substream;
2997 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2998 snd_pcm_sframes_t result;
2999
3000 pcm_file = file->private_data;
3001 substream = pcm_file->substream;
7eaa943c
TI		 3002 if (PCM_RUNTIME_CHECK(substream))
3003 return -ENXIO;
1da177e4 3004 runtime = substream->runtime;
7eaa943c
TI		 3005 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3006 return -EBADFD;
3007 if (!frame_aligned(runtime, count))
3008 return -EINVAL;
1da177e4
LT		 3009 count = bytes_to_frames(runtime, count);
3010 result = snd_pcm_lib_write(substream, buf, count);
3011 if (result > 0)
3012 result = frames_to_bytes(runtime, result);
1da177e4
LT		 3013 return result;
3014}
3015
ee0b3e67
BP		 3016static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
3017 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 3018
3019{
877211f5
TI		 3020 struct snd_pcm_file *pcm_file;
3021 struct snd_pcm_substream *substream;
3022 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3023 snd_pcm_sframes_t result;
3024 unsigned long i;
3025 void __user **bufs;
3026 snd_pcm_uframes_t frames;
3027
ee0b3e67 3028 pcm_file = iocb->ki_filp->private_data;
1da177e4 3029 substream = pcm_file->substream;
7eaa943c
TI		 3030 if (PCM_RUNTIME_CHECK(substream))
3031 return -ENXIO;
1da177e4
LT		 3032 runtime = substream->runtime;
3033 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3034 return -EBADFD;
ee0b3e67 3035 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 3036 return -EINVAL;
ee0b3e67 3037 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 3038 return -EINVAL;
ee0b3e67
BP		 3039 frames = bytes_to_samples(runtime, iov->iov_len);
3040 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 3041 if (bufs == NULL)
3042 return -ENOMEM;
ee0b3e67
BP		 3043 for (i = 0; i < nr_segs; ++i)
3044 bufs[i] = iov[i].iov_base;
1da177e4
LT		 3045 result = snd_pcm_lib_readv(substream, bufs, frames);
3046 if (result > 0)
3047 result = frames_to_bytes(runtime, result);
3048 kfree(bufs);
3049 return result;
3050}
3051
ee0b3e67
BP		 3052static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
3053 unsigned long nr_segs, loff_t pos)
1da177e4 3054{
877211f5
TI		 3055 struct snd_pcm_file *pcm_file;
3056 struct snd_pcm_substream *substream;
3057 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3058 snd_pcm_sframes_t result;
3059 unsigned long i;
3060 void __user **bufs;
3061 snd_pcm_uframes_t frames;
3062
ee0b3e67 3063 pcm_file = iocb->ki_filp->private_data;
1da177e4 3064 substream = pcm_file->substream;
7eaa943c
TI		 3065 if (PCM_RUNTIME_CHECK(substream))
3066 return -ENXIO;
1da177e4 3067 runtime = substream->runtime;
7eaa943c
TI		 3068 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3069 return -EBADFD;
ee0b3e67 3070 if (nr_segs > 128 || nr_segs != runtime->channels ||
7eaa943c
TI		 3071 !frame_aligned(runtime, iov->iov_len))
3072 return -EINVAL;
ee0b3e67
BP		 3073 frames = bytes_to_samples(runtime, iov->iov_len);
3074 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 3075 if (bufs == NULL)
3076 return -ENOMEM;
ee0b3e67
BP		 3077 for (i = 0; i < nr_segs; ++i)
3078 bufs[i] = iov[i].iov_base;
1da177e4
LT		 3079 result = snd_pcm_lib_writev(substream, bufs, frames);
3080 if (result > 0)
3081 result = frames_to_bytes(runtime, result);
3082 kfree(bufs);
1da177e4
LT		 3083 return result;
3084}
3085
3086static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3087{
877211f5
TI		 3088 struct snd_pcm_file *pcm_file;
3089 struct snd_pcm_substream *substream;
3090 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3091 unsigned int mask;
3092 snd_pcm_uframes_t avail;
3093
3094 pcm_file = file->private_data;
3095
3096 substream = pcm_file->substream;
7eaa943c
TI		 3097 if (PCM_RUNTIME_CHECK(substream))
3098 return -ENXIO;
1da177e4
LT		 3099 runtime = substream->runtime;
3100
3101 poll_wait(file, &runtime->sleep, wait);
3102
3103 snd_pcm_stream_lock_irq(substream);
3104 avail = snd_pcm_playback_avail(runtime);
3105 switch (runtime->status->state) {
3106 case SNDRV_PCM_STATE_RUNNING:
3107 case SNDRV_PCM_STATE_PREPARED:
3108 case SNDRV_PCM_STATE_PAUSED:
3109 if (avail >= runtime->control->avail_min) {
3110 mask = POLLOUT | POLLWRNORM;
3111 break;
3112 }
3113 /* Fall through */
3114 case SNDRV_PCM_STATE_DRAINING:
3115 mask = 0;
3116 break;
3117 default:
3118 mask = POLLOUT | POLLWRNORM | POLLERR;
3119 break;
3120 }
3121 snd_pcm_stream_unlock_irq(substream);
3122 return mask;
3123}
3124
3125static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3126{
877211f5
TI		 3127 struct snd_pcm_file *pcm_file;
3128 struct snd_pcm_substream *substream;
3129 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3130 unsigned int mask;
3131 snd_pcm_uframes_t avail;
3132
3133 pcm_file = file->private_data;
3134
3135 substream = pcm_file->substream;
7eaa943c
TI		 3136 if (PCM_RUNTIME_CHECK(substream))
3137 return -ENXIO;
1da177e4
LT		 3138 runtime = substream->runtime;
3139
3140 poll_wait(file, &runtime->sleep, wait);
3141
3142 snd_pcm_stream_lock_irq(substream);
3143 avail = snd_pcm_capture_avail(runtime);
3144 switch (runtime->status->state) {
3145 case SNDRV_PCM_STATE_RUNNING:
3146 case SNDRV_PCM_STATE_PREPARED:
3147 case SNDRV_PCM_STATE_PAUSED:
3148 if (avail >= runtime->control->avail_min) {
3149 mask = POLLIN | POLLRDNORM;
3150 break;
3151 }
3152 mask = 0;
3153 break;
3154 case SNDRV_PCM_STATE_DRAINING:
3155 if (avail > 0) {
3156 mask = POLLIN | POLLRDNORM;
3157 break;
3158 }
3159 /* Fall through */
3160 default:
3161 mask = POLLIN | POLLRDNORM | POLLERR;
3162 break;
3163 }
3164 snd_pcm_stream_unlock_irq(substream);
3165 return mask;
3166}
3167
3168/*
3169 * mmap support
3170 */
3171
3172/*
3173 * Only on coherent architectures, we can mmap the status and the control records
3174 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3175 */
3176#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3177/*
3178 * mmap status record
3179 */
3ad5afcd
NP		 3180static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3181 struct vm_fault *vmf)
1da177e4 3182{
877211f5
TI		 3183 struct snd_pcm_substream *substream = area->vm_private_data;
3184 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3185
3186 if (substream == NULL)
3ad5afcd 3187 return VM_FAULT_SIGBUS;
1da177e4 3188 runtime = substream->runtime;
3ad5afcd
NP		 3189 vmf->page = virt_to_page(runtime->status);
3190 get_page(vmf->page);
3191 return 0;
1da177e4
LT		 3192}
3193
f0f37e2f 3194static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3195{
3ad5afcd 3196 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3197};
3198
877211f5 3199static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3200 struct vm_area_struct *area)
3201{
1da177e4
LT		 3202 long size;
3203 if (!(area->vm_flags & VM_READ))
3204 return -EINVAL;
1da177e4 3205 size = area->vm_end - area->vm_start;
877211f5 3206 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3207 return -EINVAL;
3208 area->vm_ops = &snd_pcm_vm_ops_status;
3209 area->vm_private_data = substream;
314e51b9 3210 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3211 return 0;
3212}
3213
3214/*
3215 * mmap control record
3216 */
3ad5afcd
NP		 3217static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3218 struct vm_fault *vmf)
1da177e4 3219{
877211f5
TI		 3220 struct snd_pcm_substream *substream = area->vm_private_data;
3221 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3222
3223 if (substream == NULL)
3ad5afcd 3224 return VM_FAULT_SIGBUS;
1da177e4 3225 runtime = substream->runtime;
3ad5afcd
NP		 3226 vmf->page = virt_to_page(runtime->control);
3227 get_page(vmf->page);
3228 return 0;
1da177e4
LT		 3229}
3230
f0f37e2f 3231static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3232{
3ad5afcd 3233 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3234};
3235
877211f5 3236static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3237 struct vm_area_struct *area)
3238{
1da177e4
LT		 3239 long size;
3240 if (!(area->vm_flags & VM_READ))
3241 return -EINVAL;
1da177e4 3242 size = area->vm_end - area->vm_start;
877211f5 3243 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3244 return -EINVAL;
3245 area->vm_ops = &snd_pcm_vm_ops_control;
3246 area->vm_private_data = substream;
314e51b9 3247 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3248 return 0;
3249}
3250#else /* ! coherent mmap */
3251/*
3252 * don't support mmap for status and control records.
3253 */
877211f5 3254static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3255 struct vm_area_struct *area)
3256{
3257 return -ENXIO;
3258}
877211f5 3259static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3260 struct vm_area_struct *area)
3261{
3262 return -ENXIO;
3263}
3264#endif /* coherent mmap */
3265
9eb4a067
TI		 3266static inline struct page *
3267snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3268{
3269 void *vaddr = substream->runtime->dma_area + ofs;
3270 return virt_to_page(vaddr);
3271}
3272
1da177e4 3273/*
3ad5afcd 3274 * fault callback for mmapping a RAM page
1da177e4 3275 */
3ad5afcd
NP		 3276static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3277 struct vm_fault *vmf)
1da177e4 3278{
877211f5
TI		 3279 struct snd_pcm_substream *substream = area->vm_private_data;
3280 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3281 unsigned long offset;
3282 struct page * page;
1da177e4
LT		 3283 size_t dma_bytes;
3284
3285 if (substream == NULL)
3ad5afcd 3286 return VM_FAULT_SIGBUS;
1da177e4 3287 runtime = substream->runtime;
3ad5afcd 3288 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3289 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3290 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3291 return VM_FAULT_SIGBUS;
9eb4a067 3292 if (substream->ops->page)
1da177e4 3293 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3294 else
3295 page = snd_pcm_default_page_ops(substream, offset);
3296 if (!page)
3297 return VM_FAULT_SIGBUS;
b5810039 3298 get_page(page);
3ad5afcd
NP		 3299 vmf->page = page;
3300 return 0;
1da177e4
LT		 3301}
3302
657b1989
TI		 3303static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3304 .open = snd_pcm_mmap_data_open,
3305 .close = snd_pcm_mmap_data_close,
3306};
3307
3308static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3309 .open = snd_pcm_mmap_data_open,
3310 .close = snd_pcm_mmap_data_close,
3ad5afcd 3311 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3312};
3313
3314/*
3315 * mmap the DMA buffer on RAM
3316 */
18a2b962
TI		 3317int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3318 struct vm_area_struct *area)
1da177e4 3319{
314e51b9 3320 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
a5606f85 3321#ifdef CONFIG_GENERIC_ALLOCATOR
05503214
NC		 3322 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3323 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3324 return remap_pfn_range(area, area->vm_start,
3325 substream->dma_buffer.addr >> PAGE_SHIFT,
3326 area->vm_end - area->vm_start, area->vm_page_prot);
3327 }
a5606f85 3328#endif /* CONFIG_GENERIC_ALLOCATOR */
657b1989
TI		 3329 if (!substream->ops->page &&
3330 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3331 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3332 area,
3333 substream->runtime->dma_area,
3334 substream->runtime->dma_addr,
3335 area->vm_end - area->vm_start);
657b1989
TI		 3336 /* mmap with fault handler */
3337 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3338 return 0;
3339}
18a2b962 3340EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3341
3342/*
3343 * mmap the DMA buffer on I/O memory area
3344 */
3345#if SNDRV_PCM_INFO_MMAP_IOMEM
877211f5
TI		 3346int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3347 struct vm_area_struct *area)
1da177e4 3348{
0fe09a45 3349 struct snd_pcm_runtime *runtime = substream->runtime;;
1da177e4 3350
1da177e4 3351 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
0fe09a45 3352 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
1da177e4 3353}
e88e8ae6
TI		 3354
3355EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3356#endif /* SNDRV_PCM_INFO_MMAP */
3357
3358/*
3359 * mmap DMA buffer
3360 */
877211f5 3361int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3362 struct vm_area_struct *area)
3363{
877211f5 3364 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3365 long size;
3366 unsigned long offset;
3367 size_t dma_bytes;
657b1989 3368 int err;
1da177e4
LT		 3369
3370 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3371 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3372 return -EINVAL;
3373 } else {
3374 if (!(area->vm_flags & VM_READ))
3375 return -EINVAL;
3376 }
3377 runtime = substream->runtime;
1da177e4
LT		 3378 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3379 return -EBADFD;
3380 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3381 return -ENXIO;
3382 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3383 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3384 return -EINVAL;
3385 size = area->vm_end - area->vm_start;
3386 offset = area->vm_pgoff << PAGE_SHIFT;
3387 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3388 if ((size_t)size > dma_bytes)
3389 return -EINVAL;
3390 if (offset > dma_bytes - size)
3391 return -EINVAL;
3392
657b1989
TI		 3393 area->vm_ops = &snd_pcm_vm_ops_data;
3394 area->vm_private_data = substream;
1da177e4 3395 if (substream->ops->mmap)
657b1989 3396 err = substream->ops->mmap(substream, area);
1da177e4 3397 else
18a2b962 3398 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3399 if (!err)
3400 atomic_inc(&substream->mmap_count);
3401 return err;
1da177e4
LT		 3402}
3403
e88e8ae6
TI		 3404EXPORT_SYMBOL(snd_pcm_mmap_data);
3405
1da177e4
LT		 3406static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3407{
877211f5
TI		 3408 struct snd_pcm_file * pcm_file;
3409 struct snd_pcm_substream *substream;
1da177e4
LT		 3410 unsigned long offset;
3411
3412 pcm_file = file->private_data;
3413 substream = pcm_file->substream;
7eaa943c
TI		 3414 if (PCM_RUNTIME_CHECK(substream))
3415 return -ENXIO;
1da177e4
LT		 3416
3417 offset = area->vm_pgoff << PAGE_SHIFT;
3418 switch (offset) {
3419 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3420 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3421 return -ENXIO;
3422 return snd_pcm_mmap_status(substream, file, area);
3423 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3424 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3425 return -ENXIO;
3426 return snd_pcm_mmap_control(substream, file, area);
3427 default:
3428 return snd_pcm_mmap_data(substream, file, area);
3429 }
3430 return 0;
3431}
3432
3433static int snd_pcm_fasync(int fd, struct file * file, int on)
3434{
877211f5
TI		 3435 struct snd_pcm_file * pcm_file;
3436 struct snd_pcm_substream *substream;
3437 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3438
3439 pcm_file = file->private_data;
3440 substream = pcm_file->substream;
7eaa943c 3441 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3442 return -ENXIO;
1da177e4 3443 runtime = substream->runtime;
d05468b7 3444 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3445}
3446
3447/*
3448 * ioctl32 compat
3449 */
3450#ifdef CONFIG_COMPAT
3451#include "pcm_compat.c"
3452#else
3453#define snd_pcm_ioctl_compat NULL
3454#endif
3455
3456/*
3457 * To be removed helpers to keep binary compatibility
3458 */
3459
59d48582 3460#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3461#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3462#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3463
877211f5
TI		 3464static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3465 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3466{
3467 unsigned int i;
3468
3469 memset(params, 0, sizeof(*params));
3470 params->flags = oparams->flags;
3471 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3472 params->masks[i].bits[0] = oparams->masks[i];
3473 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3474 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3475 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3476 params->info = oparams->info;
3477 params->msbits = oparams->msbits;
3478 params->rate_num = oparams->rate_num;
3479 params->rate_den = oparams->rate_den;
3480 params->fifo_size = oparams->fifo_size;
3481}
3482
877211f5
TI		 3483static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3484 struct snd_pcm_hw_params *params)
1da177e4
LT		 3485{
3486 unsigned int i;
3487
3488 memset(oparams, 0, sizeof(*oparams));
3489 oparams->flags = params->flags;
3490 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3491 oparams->masks[i] = params->masks[i].bits[0];
3492 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3493 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3494 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3495 oparams->info = params->info;
3496 oparams->msbits = params->msbits;
3497 oparams->rate_num = params->rate_num;
3498 oparams->rate_den = params->rate_den;
3499 oparams->fifo_size = params->fifo_size;
3500}
3501
877211f5
TI		 3502static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3503 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3504{
877211f5
TI		 3505 struct snd_pcm_hw_params *params;
3506 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3507 int err;
3508
3509 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3510 if (!params)
3511 return -ENOMEM;
1da177e4 3512
ef44a1ec
LZ		 3513 oparams = memdup_user(_oparams, sizeof(*oparams));
3514 if (IS_ERR(oparams)) {
3515 err = PTR_ERR(oparams);
1da177e4
LT		 3516 goto out;
3517 }
3518 snd_pcm_hw_convert_from_old_params(params, oparams);
3519 err = snd_pcm_hw_refine(substream, params);
3520 snd_pcm_hw_convert_to_old_params(oparams, params);
3521 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3522 if (!err)
3523 err = -EFAULT;
3524 }
ef44a1ec
LZ		 3525
3526 kfree(oparams);
1da177e4
LT		 3527out:
3528 kfree(params);
1da177e4
LT		 3529 return err;
3530}
3531
877211f5
TI		 3532static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3533 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3534{
877211f5
TI		 3535 struct snd_pcm_hw_params *params;
3536 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3537 int err;
3538
3539 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3540 if (!params)
3541 return -ENOMEM;
3542
3543 oparams = memdup_user(_oparams, sizeof(*oparams));
3544 if (IS_ERR(oparams)) {
3545 err = PTR_ERR(oparams);
1da177e4
LT		 3546 goto out;
3547 }
3548 snd_pcm_hw_convert_from_old_params(params, oparams);
3549 err = snd_pcm_hw_params(substream, params);
3550 snd_pcm_hw_convert_to_old_params(oparams, params);
3551 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3552 if (!err)
3553 err = -EFAULT;
3554 }
ef44a1ec
LZ		 3555
3556 kfree(oparams);
1da177e4
LT		 3557out:
3558 kfree(params);
1da177e4
LT		 3559 return err;
3560}
59d48582 3561#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3562
7003609b 3563#ifndef CONFIG_MMU
55c63bd2
DG		 3564static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3565 unsigned long addr,
3566 unsigned long len,
3567 unsigned long pgoff,
3568 unsigned long flags)
3569{
3570 struct snd_pcm_file *pcm_file = file->private_data;
3571 struct snd_pcm_substream *substream = pcm_file->substream;
3572 struct snd_pcm_runtime *runtime = substream->runtime;
3573 unsigned long offset = pgoff << PAGE_SHIFT;
3574
3575 switch (offset) {
3576 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3577 return (unsigned long)runtime->status;
3578 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3579 return (unsigned long)runtime->control;
3580 default:
3581 return (unsigned long)runtime->dma_area + offset;
3582 }
7003609b
CC		 3583}
3584#else
55c63bd2 3585# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3586#endif
3587
1da177e4
LT		 3588/*
3589 * Register section
3590 */
3591
9c2e08c5 3592const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3593 {
2af677fc
CL		 3594 .owner = THIS_MODULE,
3595 .write = snd_pcm_write,
ee0b3e67 3596 .aio_write = snd_pcm_aio_write,
f87135f5 3597 .open = snd_pcm_playback_open,
2af677fc 3598 .release = snd_pcm_release,
02f4865f 3599 .llseek = no_llseek,
2af677fc
CL		 3600 .poll = snd_pcm_playback_poll,
3601 .unlocked_ioctl = snd_pcm_playback_ioctl,
3602 .compat_ioctl = snd_pcm_ioctl_compat,
3603 .mmap = snd_pcm_mmap,
3604 .fasync = snd_pcm_fasync,
55c63bd2 3605 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3606 },
3607 {
2af677fc
CL		 3608 .owner = THIS_MODULE,
3609 .read = snd_pcm_read,
ee0b3e67 3610 .aio_read = snd_pcm_aio_read,
f87135f5 3611 .open = snd_pcm_capture_open,
2af677fc 3612 .release = snd_pcm_release,
02f4865f 3613 .llseek = no_llseek,
2af677fc
CL		 3614 .poll = snd_pcm_capture_poll,
3615 .unlocked_ioctl = snd_pcm_capture_ioctl,
3616 .compat_ioctl = snd_pcm_ioctl_compat,
3617 .mmap = snd_pcm_mmap,
3618 .fasync = snd_pcm_fasync,
55c63bd2 3619 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3620 }
3621};
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