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[ALSA] Remove PCM xfer_align sw params
[deliverable/linux.git] / sound / core / pcm_native.c
1 /*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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
22 #include <sound/driver.h>
23 #include <linux/mm.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/latency.h>
28 #include <linux/uio.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include <sound/info.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/timer.h>
35 #include <sound/minors.h>
36 #include <asm/io.h>
37
38 /*
39 * Compatibility
40 */
41
42 struct snd_pcm_hw_params_old {
43 unsigned int flags;
44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45 SNDRV_PCM_HW_PARAM_ACCESS + 1];
46 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
48 unsigned int rmask;
49 unsigned int cmask;
50 unsigned int info;
51 unsigned int msbits;
52 unsigned int rate_num;
53 unsigned int rate_den;
54 snd_pcm_uframes_t fifo_size;
55 unsigned char reserved[64];
56 };
57
58 #ifdef CONFIG_SND_SUPPORT_OLD_API
59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
61
62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63 struct snd_pcm_hw_params_old __user * _oparams);
64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
66 #endif
67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
68
69 /*
70 *
71 */
72
73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
75
76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
77
78 static inline mm_segment_t snd_enter_user(void)
79 {
80 mm_segment_t fs = get_fs();
81 set_fs(get_ds());
82 return fs;
83 }
84
85 static inline void snd_leave_user(mm_segment_t fs)
86 {
87 set_fs(fs);
88 }
89
90
91
92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
93 {
94 struct snd_pcm_runtime *runtime;
95 struct snd_pcm *pcm = substream->pcm;
96 struct snd_pcm_str *pstr = substream->pstr;
97
98 snd_assert(substream != NULL, return -ENXIO);
99 memset(info, 0, sizeof(*info));
100 info->card = pcm->card->number;
101 info->device = pcm->device;
102 info->stream = substream->stream;
103 info->subdevice = substream->number;
104 strlcpy(info->id, pcm->id, sizeof(info->id));
105 strlcpy(info->name, pcm->name, sizeof(info->name));
106 info->dev_class = pcm->dev_class;
107 info->dev_subclass = pcm->dev_subclass;
108 info->subdevices_count = pstr->substream_count;
109 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
110 strlcpy(info->subname, substream->name, sizeof(info->subname));
111 runtime = substream->runtime;
112 /* AB: FIXME!!! This is definitely nonsense */
113 if (runtime) {
114 info->sync = runtime->sync;
115 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
116 }
117 return 0;
118 }
119
120 int snd_pcm_info_user(struct snd_pcm_substream *substream,
121 struct snd_pcm_info __user * _info)
122 {
123 struct snd_pcm_info *info;
124 int err;
125
126 info = kmalloc(sizeof(*info), GFP_KERNEL);
127 if (! info)
128 return -ENOMEM;
129 err = snd_pcm_info(substream, info);
130 if (err >= 0) {
131 if (copy_to_user(_info, info, sizeof(*info)))
132 err = -EFAULT;
133 }
134 kfree(info);
135 return err;
136 }
137
138 #undef RULES_DEBUG
139
140 #ifdef RULES_DEBUG
141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
142 char *snd_pcm_hw_param_names[] = {
143 HW_PARAM(ACCESS),
144 HW_PARAM(FORMAT),
145 HW_PARAM(SUBFORMAT),
146 HW_PARAM(SAMPLE_BITS),
147 HW_PARAM(FRAME_BITS),
148 HW_PARAM(CHANNELS),
149 HW_PARAM(RATE),
150 HW_PARAM(PERIOD_TIME),
151 HW_PARAM(PERIOD_SIZE),
152 HW_PARAM(PERIOD_BYTES),
153 HW_PARAM(PERIODS),
154 HW_PARAM(BUFFER_TIME),
155 HW_PARAM(BUFFER_SIZE),
156 HW_PARAM(BUFFER_BYTES),
157 HW_PARAM(TICK_TIME),
158 };
159 #endif
160
161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
162 struct snd_pcm_hw_params *params)
163 {
164 unsigned int k;
165 struct snd_pcm_hardware *hw;
166 struct snd_interval *i = NULL;
167 struct snd_mask *m = NULL;
168 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
169 unsigned int rstamps[constrs->rules_num];
170 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
171 unsigned int stamp = 2;
172 int changed, again;
173
174 params->info = 0;
175 params->fifo_size = 0;
176 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
177 params->msbits = 0;
178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
179 params->rate_num = 0;
180 params->rate_den = 0;
181 }
182
183 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
184 m = hw_param_mask(params, k);
185 if (snd_mask_empty(m))
186 return -EINVAL;
187 if (!(params->rmask & (1 << k)))
188 continue;
189 #ifdef RULES_DEBUG
190 printk("%s = ", snd_pcm_hw_param_names[k]);
191 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
192 #endif
193 changed = snd_mask_refine(m, constrs_mask(constrs, k));
194 #ifdef RULES_DEBUG
195 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
196 #endif
197 if (changed)
198 params->cmask |= 1 << k;
199 if (changed < 0)
200 return changed;
201 }
202
203 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
204 i = hw_param_interval(params, k);
205 if (snd_interval_empty(i))
206 return -EINVAL;
207 if (!(params->rmask & (1 << k)))
208 continue;
209 #ifdef RULES_DEBUG
210 printk("%s = ", snd_pcm_hw_param_names[k]);
211 if (i->empty)
212 printk("empty");
213 else
214 printk("%c%u %u%c",
215 i->openmin ? '(' : '[', i->min,
216 i->max, i->openmax ? ')' : ']');
217 printk(" -> ");
218 #endif
219 changed = snd_interval_refine(i, constrs_interval(constrs, k));
220 #ifdef RULES_DEBUG
221 if (i->empty)
222 printk("empty\n");
223 else
224 printk("%c%u %u%c\n",
225 i->openmin ? '(' : '[', i->min,
226 i->max, i->openmax ? ')' : ']');
227 #endif
228 if (changed)
229 params->cmask |= 1 << k;
230 if (changed < 0)
231 return changed;
232 }
233
234 for (k = 0; k < constrs->rules_num; k++)
235 rstamps[k] = 0;
236 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
237 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
238 do {
239 again = 0;
240 for (k = 0; k < constrs->rules_num; k++) {
241 struct snd_pcm_hw_rule *r = &constrs->rules[k];
242 unsigned int d;
243 int doit = 0;
244 if (r->cond && !(r->cond & params->flags))
245 continue;
246 for (d = 0; r->deps[d] >= 0; d++) {
247 if (vstamps[r->deps[d]] > rstamps[k]) {
248 doit = 1;
249 break;
250 }
251 }
252 if (!doit)
253 continue;
254 #ifdef RULES_DEBUG
255 printk("Rule %d [%p]: ", k, r->func);
256 if (r->var >= 0) {
257 printk("%s = ", snd_pcm_hw_param_names[r->var]);
258 if (hw_is_mask(r->var)) {
259 m = hw_param_mask(params, r->var);
260 printk("%x", *m->bits);
261 } else {
262 i = hw_param_interval(params, r->var);
263 if (i->empty)
264 printk("empty");
265 else
266 printk("%c%u %u%c",
267 i->openmin ? '(' : '[', i->min,
268 i->max, i->openmax ? ')' : ']');
269 }
270 }
271 #endif
272 changed = r->func(params, r);
273 #ifdef RULES_DEBUG
274 if (r->var >= 0) {
275 printk(" -> ");
276 if (hw_is_mask(r->var))
277 printk("%x", *m->bits);
278 else {
279 if (i->empty)
280 printk("empty");
281 else
282 printk("%c%u %u%c",
283 i->openmin ? '(' : '[', i->min,
284 i->max, i->openmax ? ')' : ']');
285 }
286 }
287 printk("\n");
288 #endif
289 rstamps[k] = stamp;
290 if (changed && r->var >= 0) {
291 params->cmask |= (1 << r->var);
292 vstamps[r->var] = stamp;
293 again = 1;
294 }
295 if (changed < 0)
296 return changed;
297 stamp++;
298 }
299 } while (again);
300 if (!params->msbits) {
301 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
302 if (snd_interval_single(i))
303 params->msbits = snd_interval_value(i);
304 }
305
306 if (!params->rate_den) {
307 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
308 if (snd_interval_single(i)) {
309 params->rate_num = snd_interval_value(i);
310 params->rate_den = 1;
311 }
312 }
313
314 hw = &substream->runtime->hw;
315 if (!params->info)
316 params->info = hw->info;
317 if (!params->fifo_size)
318 params->fifo_size = hw->fifo_size;
319 params->rmask = 0;
320 return 0;
321 }
322
323 EXPORT_SYMBOL(snd_pcm_hw_refine);
324
325 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
326 struct snd_pcm_hw_params __user * _params)
327 {
328 struct snd_pcm_hw_params *params;
329 int err;
330
331 params = kmalloc(sizeof(*params), GFP_KERNEL);
332 if (!params) {
333 err = -ENOMEM;
334 goto out;
335 }
336 if (copy_from_user(params, _params, sizeof(*params))) {
337 err = -EFAULT;
338 goto out;
339 }
340 err = snd_pcm_hw_refine(substream, params);
341 if (copy_to_user(_params, params, sizeof(*params))) {
342 if (!err)
343 err = -EFAULT;
344 }
345 out:
346 kfree(params);
347 return err;
348 }
349
350 static int period_to_usecs(struct snd_pcm_runtime *runtime)
351 {
352 int usecs;
353
354 if (! runtime->rate)
355 return -1; /* invalid */
356
357 /* take 75% of period time as the deadline */
358 usecs = (750000 / runtime->rate) * runtime->period_size;
359 usecs += ((750000 % runtime->rate) * runtime->period_size) /
360 runtime->rate;
361
362 return usecs;
363 }
364
365 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
366 struct snd_pcm_hw_params *params)
367 {
368 struct snd_pcm_runtime *runtime;
369 int err, usecs;
370 unsigned int bits;
371 snd_pcm_uframes_t frames;
372
373 snd_assert(substream != NULL, return -ENXIO);
374 runtime = substream->runtime;
375 snd_assert(runtime != NULL, return -ENXIO);
376 snd_pcm_stream_lock_irq(substream);
377 switch (runtime->status->state) {
378 case SNDRV_PCM_STATE_OPEN:
379 case SNDRV_PCM_STATE_SETUP:
380 case SNDRV_PCM_STATE_PREPARED:
381 break;
382 default:
383 snd_pcm_stream_unlock_irq(substream);
384 return -EBADFD;
385 }
386 snd_pcm_stream_unlock_irq(substream);
387 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
388 if (!substream->oss.oss)
389 #endif
390 if (atomic_read(&substream->mmap_count))
391 return -EBADFD;
392
393 params->rmask = ~0U;
394 err = snd_pcm_hw_refine(substream, params);
395 if (err < 0)
396 goto _error;
397
398 err = snd_pcm_hw_params_choose(substream, params);
399 if (err < 0)
400 goto _error;
401
402 if (substream->ops->hw_params != NULL) {
403 err = substream->ops->hw_params(substream, params);
404 if (err < 0)
405 goto _error;
406 }
407
408 runtime->access = params_access(params);
409 runtime->format = params_format(params);
410 runtime->subformat = params_subformat(params);
411 runtime->channels = params_channels(params);
412 runtime->rate = params_rate(params);
413 runtime->period_size = params_period_size(params);
414 runtime->periods = params_periods(params);
415 runtime->buffer_size = params_buffer_size(params);
416 runtime->tick_time = params_tick_time(params);
417 runtime->info = params->info;
418 runtime->rate_num = params->rate_num;
419 runtime->rate_den = params->rate_den;
420
421 bits = snd_pcm_format_physical_width(runtime->format);
422 runtime->sample_bits = bits;
423 bits *= runtime->channels;
424 runtime->frame_bits = bits;
425 frames = 1;
426 while (bits % 8 != 0) {
427 bits *= 2;
428 frames *= 2;
429 }
430 runtime->byte_align = bits / 8;
431 runtime->min_align = frames;
432
433 /* Default sw params */
434 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
435 runtime->period_step = 1;
436 runtime->sleep_min = 0;
437 runtime->control->avail_min = runtime->period_size;
438 runtime->start_threshold = 1;
439 runtime->stop_threshold = runtime->buffer_size;
440 runtime->silence_threshold = 0;
441 runtime->silence_size = 0;
442 runtime->boundary = runtime->buffer_size;
443 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
444 runtime->boundary *= 2;
445
446 snd_pcm_timer_resolution_change(substream);
447 runtime->status->state = SNDRV_PCM_STATE_SETUP;
448
449 remove_acceptable_latency(substream->latency_id);
450 if ((usecs = period_to_usecs(runtime)) >= 0)
451 set_acceptable_latency(substream->latency_id, usecs);
452 return 0;
453 _error:
454 /* hardware might be unuseable from this time,
455 so we force application to retry to set
456 the correct hardware parameter settings */
457 runtime->status->state = SNDRV_PCM_STATE_OPEN;
458 if (substream->ops->hw_free != NULL)
459 substream->ops->hw_free(substream);
460 return err;
461 }
462
463 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
464 struct snd_pcm_hw_params __user * _params)
465 {
466 struct snd_pcm_hw_params *params;
467 int err;
468
469 params = kmalloc(sizeof(*params), GFP_KERNEL);
470 if (!params) {
471 err = -ENOMEM;
472 goto out;
473 }
474 if (copy_from_user(params, _params, sizeof(*params))) {
475 err = -EFAULT;
476 goto out;
477 }
478 err = snd_pcm_hw_params(substream, params);
479 if (copy_to_user(_params, params, sizeof(*params))) {
480 if (!err)
481 err = -EFAULT;
482 }
483 out:
484 kfree(params);
485 return err;
486 }
487
488 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
489 {
490 struct snd_pcm_runtime *runtime;
491 int result = 0;
492
493 snd_assert(substream != NULL, return -ENXIO);
494 runtime = substream->runtime;
495 snd_assert(runtime != NULL, return -ENXIO);
496 snd_pcm_stream_lock_irq(substream);
497 switch (runtime->status->state) {
498 case SNDRV_PCM_STATE_SETUP:
499 case SNDRV_PCM_STATE_PREPARED:
500 break;
501 default:
502 snd_pcm_stream_unlock_irq(substream);
503 return -EBADFD;
504 }
505 snd_pcm_stream_unlock_irq(substream);
506 if (atomic_read(&substream->mmap_count))
507 return -EBADFD;
508 if (substream->ops->hw_free)
509 result = substream->ops->hw_free(substream);
510 runtime->status->state = SNDRV_PCM_STATE_OPEN;
511 remove_acceptable_latency(substream->latency_id);
512 return result;
513 }
514
515 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
516 struct snd_pcm_sw_params *params)
517 {
518 struct snd_pcm_runtime *runtime;
519
520 snd_assert(substream != NULL, return -ENXIO);
521 runtime = substream->runtime;
522 snd_assert(runtime != NULL, return -ENXIO);
523 snd_pcm_stream_lock_irq(substream);
524 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
525 snd_pcm_stream_unlock_irq(substream);
526 return -EBADFD;
527 }
528 snd_pcm_stream_unlock_irq(substream);
529
530 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
531 return -EINVAL;
532 if (params->avail_min == 0)
533 return -EINVAL;
534 if (params->silence_size >= runtime->boundary) {
535 if (params->silence_threshold != 0)
536 return -EINVAL;
537 } else {
538 if (params->silence_size > params->silence_threshold)
539 return -EINVAL;
540 if (params->silence_threshold > runtime->buffer_size)
541 return -EINVAL;
542 }
543 snd_pcm_stream_lock_irq(substream);
544 runtime->tstamp_mode = params->tstamp_mode;
545 runtime->sleep_min = params->sleep_min;
546 runtime->period_step = params->period_step;
547 runtime->control->avail_min = params->avail_min;
548 runtime->start_threshold = params->start_threshold;
549 runtime->stop_threshold = params->stop_threshold;
550 runtime->silence_threshold = params->silence_threshold;
551 runtime->silence_size = params->silence_size;
552 params->boundary = runtime->boundary;
553 if (snd_pcm_running(substream)) {
554 if (runtime->sleep_min)
555 snd_pcm_tick_prepare(substream);
556 else
557 snd_pcm_tick_set(substream, 0);
558 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
559 runtime->silence_size > 0)
560 snd_pcm_playback_silence(substream, ULONG_MAX);
561 wake_up(&runtime->sleep);
562 }
563 snd_pcm_stream_unlock_irq(substream);
564 return 0;
565 }
566
567 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
568 struct snd_pcm_sw_params __user * _params)
569 {
570 struct snd_pcm_sw_params params;
571 int err;
572 if (copy_from_user(&params, _params, sizeof(params)))
573 return -EFAULT;
574 err = snd_pcm_sw_params(substream, &params);
575 if (copy_to_user(_params, &params, sizeof(params)))
576 return -EFAULT;
577 return err;
578 }
579
580 int snd_pcm_status(struct snd_pcm_substream *substream,
581 struct snd_pcm_status *status)
582 {
583 struct snd_pcm_runtime *runtime = substream->runtime;
584
585 snd_pcm_stream_lock_irq(substream);
586 status->state = runtime->status->state;
587 status->suspended_state = runtime->status->suspended_state;
588 if (status->state == SNDRV_PCM_STATE_OPEN)
589 goto _end;
590 status->trigger_tstamp = runtime->trigger_tstamp;
591 if (snd_pcm_running(substream))
592 snd_pcm_update_hw_ptr(substream);
593 snd_pcm_gettime(runtime, &status->tstamp);
594 status->appl_ptr = runtime->control->appl_ptr;
595 status->hw_ptr = runtime->status->hw_ptr;
596 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
597 status->avail = snd_pcm_playback_avail(runtime);
598 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
599 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
600 status->delay = runtime->buffer_size - status->avail;
601 else
602 status->delay = 0;
603 } else {
604 status->avail = snd_pcm_capture_avail(runtime);
605 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
606 status->delay = status->avail;
607 else
608 status->delay = 0;
609 }
610 status->avail_max = runtime->avail_max;
611 status->overrange = runtime->overrange;
612 runtime->avail_max = 0;
613 runtime->overrange = 0;
614 _end:
615 snd_pcm_stream_unlock_irq(substream);
616 return 0;
617 }
618
619 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
620 struct snd_pcm_status __user * _status)
621 {
622 struct snd_pcm_status status;
623 struct snd_pcm_runtime *runtime;
624 int res;
625
626 snd_assert(substream != NULL, return -ENXIO);
627 runtime = substream->runtime;
628 memset(&status, 0, sizeof(status));
629 res = snd_pcm_status(substream, &status);
630 if (res < 0)
631 return res;
632 if (copy_to_user(_status, &status, sizeof(status)))
633 return -EFAULT;
634 return 0;
635 }
636
637 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
638 struct snd_pcm_channel_info * info)
639 {
640 struct snd_pcm_runtime *runtime;
641 unsigned int channel;
642
643 snd_assert(substream != NULL, return -ENXIO);
644 channel = info->channel;
645 runtime = substream->runtime;
646 snd_pcm_stream_lock_irq(substream);
647 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
648 snd_pcm_stream_unlock_irq(substream);
649 return -EBADFD;
650 }
651 snd_pcm_stream_unlock_irq(substream);
652 if (channel >= runtime->channels)
653 return -EINVAL;
654 memset(info, 0, sizeof(*info));
655 info->channel = channel;
656 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
657 }
658
659 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
660 struct snd_pcm_channel_info __user * _info)
661 {
662 struct snd_pcm_channel_info info;
663 int res;
664
665 if (copy_from_user(&info, _info, sizeof(info)))
666 return -EFAULT;
667 res = snd_pcm_channel_info(substream, &info);
668 if (res < 0)
669 return res;
670 if (copy_to_user(_info, &info, sizeof(info)))
671 return -EFAULT;
672 return 0;
673 }
674
675 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
676 {
677 struct snd_pcm_runtime *runtime = substream->runtime;
678 if (runtime->trigger_master == NULL)
679 return;
680 if (runtime->trigger_master == substream) {
681 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
682 } else {
683 snd_pcm_trigger_tstamp(runtime->trigger_master);
684 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
685 }
686 runtime->trigger_master = NULL;
687 }
688
689 struct action_ops {
690 int (*pre_action)(struct snd_pcm_substream *substream, int state);
691 int (*do_action)(struct snd_pcm_substream *substream, int state);
692 void (*undo_action)(struct snd_pcm_substream *substream, int state);
693 void (*post_action)(struct snd_pcm_substream *substream, int state);
694 };
695
696 /*
697 * this functions is core for handling of linked stream
698 * Note: the stream state might be changed also on failure
699 * Note2: call with calling stream lock + link lock
700 */
701 static int snd_pcm_action_group(struct action_ops *ops,
702 struct snd_pcm_substream *substream,
703 int state, int do_lock)
704 {
705 struct snd_pcm_substream *s = NULL;
706 struct snd_pcm_substream *s1;
707 int res = 0;
708
709 snd_pcm_group_for_each_entry(s, substream) {
710 if (do_lock && s != substream)
711 spin_lock_nested(&s->self_group.lock,
712 SINGLE_DEPTH_NESTING);
713 res = ops->pre_action(s, state);
714 if (res < 0)
715 goto _unlock;
716 }
717 snd_pcm_group_for_each_entry(s, substream) {
718 res = ops->do_action(s, state);
719 if (res < 0) {
720 if (ops->undo_action) {
721 snd_pcm_group_for_each_entry(s1, substream) {
722 if (s1 == s) /* failed stream */
723 break;
724 ops->undo_action(s1, state);
725 }
726 }
727 s = NULL; /* unlock all */
728 goto _unlock;
729 }
730 }
731 snd_pcm_group_for_each_entry(s, substream) {
732 ops->post_action(s, state);
733 }
734 _unlock:
735 if (do_lock) {
736 /* unlock streams */
737 snd_pcm_group_for_each_entry(s1, substream) {
738 if (s1 != substream)
739 spin_unlock(&s1->self_group.lock);
740 if (s1 == s) /* end */
741 break;
742 }
743 }
744 return res;
745 }
746
747 /*
748 * Note: call with stream lock
749 */
750 static int snd_pcm_action_single(struct action_ops *ops,
751 struct snd_pcm_substream *substream,
752 int state)
753 {
754 int res;
755
756 res = ops->pre_action(substream, state);
757 if (res < 0)
758 return res;
759 res = ops->do_action(substream, state);
760 if (res == 0)
761 ops->post_action(substream, state);
762 else if (ops->undo_action)
763 ops->undo_action(substream, state);
764 return res;
765 }
766
767 /*
768 * Note: call with stream lock
769 */
770 static int snd_pcm_action(struct action_ops *ops,
771 struct snd_pcm_substream *substream,
772 int state)
773 {
774 int res;
775
776 if (snd_pcm_stream_linked(substream)) {
777 if (!spin_trylock(&substream->group->lock)) {
778 spin_unlock(&substream->self_group.lock);
779 spin_lock(&substream->group->lock);
780 spin_lock(&substream->self_group.lock);
781 }
782 res = snd_pcm_action_group(ops, substream, state, 1);
783 spin_unlock(&substream->group->lock);
784 } else {
785 res = snd_pcm_action_single(ops, substream, state);
786 }
787 return res;
788 }
789
790 /*
791 * Note: don't use any locks before
792 */
793 static int snd_pcm_action_lock_irq(struct action_ops *ops,
794 struct snd_pcm_substream *substream,
795 int state)
796 {
797 int res;
798
799 read_lock_irq(&snd_pcm_link_rwlock);
800 if (snd_pcm_stream_linked(substream)) {
801 spin_lock(&substream->group->lock);
802 spin_lock(&substream->self_group.lock);
803 res = snd_pcm_action_group(ops, substream, state, 1);
804 spin_unlock(&substream->self_group.lock);
805 spin_unlock(&substream->group->lock);
806 } else {
807 spin_lock(&substream->self_group.lock);
808 res = snd_pcm_action_single(ops, substream, state);
809 spin_unlock(&substream->self_group.lock);
810 }
811 read_unlock_irq(&snd_pcm_link_rwlock);
812 return res;
813 }
814
815 /*
816 */
817 static int snd_pcm_action_nonatomic(struct action_ops *ops,
818 struct snd_pcm_substream *substream,
819 int state)
820 {
821 int res;
822
823 down_read(&snd_pcm_link_rwsem);
824 if (snd_pcm_stream_linked(substream))
825 res = snd_pcm_action_group(ops, substream, state, 0);
826 else
827 res = snd_pcm_action_single(ops, substream, state);
828 up_read(&snd_pcm_link_rwsem);
829 return res;
830 }
831
832 /*
833 * start callbacks
834 */
835 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
836 {
837 struct snd_pcm_runtime *runtime = substream->runtime;
838 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
839 return -EBADFD;
840 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
841 !snd_pcm_playback_data(substream))
842 return -EPIPE;
843 runtime->trigger_master = substream;
844 return 0;
845 }
846
847 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
848 {
849 if (substream->runtime->trigger_master != substream)
850 return 0;
851 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
852 }
853
854 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
855 {
856 if (substream->runtime->trigger_master == substream)
857 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
858 }
859
860 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
861 {
862 struct snd_pcm_runtime *runtime = substream->runtime;
863 snd_pcm_trigger_tstamp(substream);
864 runtime->status->state = state;
865 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
866 runtime->silence_size > 0)
867 snd_pcm_playback_silence(substream, ULONG_MAX);
868 if (runtime->sleep_min)
869 snd_pcm_tick_prepare(substream);
870 if (substream->timer)
871 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
872 &runtime->trigger_tstamp);
873 }
874
875 static struct action_ops snd_pcm_action_start = {
876 .pre_action = snd_pcm_pre_start,
877 .do_action = snd_pcm_do_start,
878 .undo_action = snd_pcm_undo_start,
879 .post_action = snd_pcm_post_start
880 };
881
882 /**
883 * snd_pcm_start
884 * @substream: the PCM substream instance
885 *
886 * Start all linked streams.
887 */
888 int snd_pcm_start(struct snd_pcm_substream *substream)
889 {
890 return snd_pcm_action(&snd_pcm_action_start, substream,
891 SNDRV_PCM_STATE_RUNNING);
892 }
893
894 /*
895 * stop callbacks
896 */
897 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
898 {
899 struct snd_pcm_runtime *runtime = substream->runtime;
900 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
901 return -EBADFD;
902 runtime->trigger_master = substream;
903 return 0;
904 }
905
906 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
907 {
908 if (substream->runtime->trigger_master == substream &&
909 snd_pcm_running(substream))
910 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
911 return 0; /* unconditonally stop all substreams */
912 }
913
914 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
915 {
916 struct snd_pcm_runtime *runtime = substream->runtime;
917 if (runtime->status->state != state) {
918 snd_pcm_trigger_tstamp(substream);
919 if (substream->timer)
920 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
921 &runtime->trigger_tstamp);
922 runtime->status->state = state;
923 snd_pcm_tick_set(substream, 0);
924 }
925 wake_up(&runtime->sleep);
926 }
927
928 static struct action_ops snd_pcm_action_stop = {
929 .pre_action = snd_pcm_pre_stop,
930 .do_action = snd_pcm_do_stop,
931 .post_action = snd_pcm_post_stop
932 };
933
934 /**
935 * snd_pcm_stop
936 * @substream: the PCM substream instance
937 * @state: PCM state after stopping the stream
938 *
939 * Try to stop all running streams in the substream group.
940 * The state of each stream is changed to the given value after that unconditionally.
941 */
942 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
943 {
944 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
945 }
946
947 EXPORT_SYMBOL(snd_pcm_stop);
948
949 /**
950 * snd_pcm_drain_done
951 * @substream: the PCM substream
952 *
953 * Stop the DMA only when the given stream is playback.
954 * The state is changed to SETUP.
955 * Unlike snd_pcm_stop(), this affects only the given stream.
956 */
957 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
958 {
959 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
960 SNDRV_PCM_STATE_SETUP);
961 }
962
963 /*
964 * pause callbacks
965 */
966 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
967 {
968 struct snd_pcm_runtime *runtime = substream->runtime;
969 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
970 return -ENOSYS;
971 if (push) {
972 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
973 return -EBADFD;
974 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
975 return -EBADFD;
976 runtime->trigger_master = substream;
977 return 0;
978 }
979
980 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
981 {
982 if (substream->runtime->trigger_master != substream)
983 return 0;
984 return substream->ops->trigger(substream,
985 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
986 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
987 }
988
989 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
990 {
991 if (substream->runtime->trigger_master == substream)
992 substream->ops->trigger(substream,
993 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
994 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
995 }
996
997 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
998 {
999 struct snd_pcm_runtime *runtime = substream->runtime;
1000 snd_pcm_trigger_tstamp(substream);
1001 if (push) {
1002 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1003 if (substream->timer)
1004 snd_timer_notify(substream->timer,
1005 SNDRV_TIMER_EVENT_MPAUSE,
1006 &runtime->trigger_tstamp);
1007 snd_pcm_tick_set(substream, 0);
1008 wake_up(&runtime->sleep);
1009 } else {
1010 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1011 if (runtime->sleep_min)
1012 snd_pcm_tick_prepare(substream);
1013 if (substream->timer)
1014 snd_timer_notify(substream->timer,
1015 SNDRV_TIMER_EVENT_MCONTINUE,
1016 &runtime->trigger_tstamp);
1017 }
1018 }
1019
1020 static struct action_ops snd_pcm_action_pause = {
1021 .pre_action = snd_pcm_pre_pause,
1022 .do_action = snd_pcm_do_pause,
1023 .undo_action = snd_pcm_undo_pause,
1024 .post_action = snd_pcm_post_pause
1025 };
1026
1027 /*
1028 * Push/release the pause for all linked streams.
1029 */
1030 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1031 {
1032 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1033 }
1034
1035 #ifdef CONFIG_PM
1036 /* suspend */
1037
1038 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1039 {
1040 struct snd_pcm_runtime *runtime = substream->runtime;
1041 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1042 return -EBUSY;
1043 runtime->trigger_master = substream;
1044 return 0;
1045 }
1046
1047 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1048 {
1049 struct snd_pcm_runtime *runtime = substream->runtime;
1050 if (runtime->trigger_master != substream)
1051 return 0;
1052 if (! snd_pcm_running(substream))
1053 return 0;
1054 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1055 return 0; /* suspend unconditionally */
1056 }
1057
1058 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1059 {
1060 struct snd_pcm_runtime *runtime = substream->runtime;
1061 snd_pcm_trigger_tstamp(substream);
1062 if (substream->timer)
1063 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1064 &runtime->trigger_tstamp);
1065 runtime->status->suspended_state = runtime->status->state;
1066 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1067 snd_pcm_tick_set(substream, 0);
1068 wake_up(&runtime->sleep);
1069 }
1070
1071 static struct action_ops snd_pcm_action_suspend = {
1072 .pre_action = snd_pcm_pre_suspend,
1073 .do_action = snd_pcm_do_suspend,
1074 .post_action = snd_pcm_post_suspend
1075 };
1076
1077 /**
1078 * snd_pcm_suspend
1079 * @substream: the PCM substream
1080 *
1081 * Trigger SUSPEND to all linked streams.
1082 * After this call, all streams are changed to SUSPENDED state.
1083 */
1084 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1085 {
1086 int err;
1087 unsigned long flags;
1088
1089 if (! substream)
1090 return 0;
1091
1092 snd_pcm_stream_lock_irqsave(substream, flags);
1093 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1094 snd_pcm_stream_unlock_irqrestore(substream, flags);
1095 return err;
1096 }
1097
1098 EXPORT_SYMBOL(snd_pcm_suspend);
1099
1100 /**
1101 * snd_pcm_suspend_all
1102 * @pcm: the PCM instance
1103 *
1104 * Trigger SUSPEND to all substreams in the given pcm.
1105 * After this call, all streams are changed to SUSPENDED state.
1106 */
1107 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1108 {
1109 struct snd_pcm_substream *substream;
1110 int stream, err = 0;
1111
1112 if (! pcm)
1113 return 0;
1114
1115 for (stream = 0; stream < 2; stream++) {
1116 for (substream = pcm->streams[stream].substream;
1117 substream; substream = substream->next) {
1118 /* FIXME: the open/close code should lock this as well */
1119 if (substream->runtime == NULL)
1120 continue;
1121 err = snd_pcm_suspend(substream);
1122 if (err < 0 && err != -EBUSY)
1123 return err;
1124 }
1125 }
1126 return 0;
1127 }
1128
1129 EXPORT_SYMBOL(snd_pcm_suspend_all);
1130
1131 /* resume */
1132
1133 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1134 {
1135 struct snd_pcm_runtime *runtime = substream->runtime;
1136 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1137 return -ENOSYS;
1138 runtime->trigger_master = substream;
1139 return 0;
1140 }
1141
1142 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1143 {
1144 struct snd_pcm_runtime *runtime = substream->runtime;
1145 if (runtime->trigger_master != substream)
1146 return 0;
1147 /* DMA not running previously? */
1148 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1149 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1150 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1151 return 0;
1152 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1153 }
1154
1155 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1156 {
1157 if (substream->runtime->trigger_master == substream &&
1158 snd_pcm_running(substream))
1159 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1160 }
1161
1162 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1163 {
1164 struct snd_pcm_runtime *runtime = substream->runtime;
1165 snd_pcm_trigger_tstamp(substream);
1166 if (substream->timer)
1167 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1168 &runtime->trigger_tstamp);
1169 runtime->status->state = runtime->status->suspended_state;
1170 if (runtime->sleep_min)
1171 snd_pcm_tick_prepare(substream);
1172 }
1173
1174 static struct action_ops snd_pcm_action_resume = {
1175 .pre_action = snd_pcm_pre_resume,
1176 .do_action = snd_pcm_do_resume,
1177 .undo_action = snd_pcm_undo_resume,
1178 .post_action = snd_pcm_post_resume
1179 };
1180
1181 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1182 {
1183 struct snd_card *card = substream->pcm->card;
1184 int res;
1185
1186 snd_power_lock(card);
1187 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1188 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1189 snd_power_unlock(card);
1190 return res;
1191 }
1192
1193 #else
1194
1195 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1196 {
1197 return -ENOSYS;
1198 }
1199
1200 #endif /* CONFIG_PM */
1201
1202 /*
1203 * xrun ioctl
1204 *
1205 * Change the RUNNING stream(s) to XRUN state.
1206 */
1207 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1208 {
1209 struct snd_card *card = substream->pcm->card;
1210 struct snd_pcm_runtime *runtime = substream->runtime;
1211 int result;
1212
1213 snd_power_lock(card);
1214 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1215 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1216 if (result < 0)
1217 goto _unlock;
1218 }
1219
1220 snd_pcm_stream_lock_irq(substream);
1221 switch (runtime->status->state) {
1222 case SNDRV_PCM_STATE_XRUN:
1223 result = 0; /* already there */
1224 break;
1225 case SNDRV_PCM_STATE_RUNNING:
1226 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1227 break;
1228 default:
1229 result = -EBADFD;
1230 }
1231 snd_pcm_stream_unlock_irq(substream);
1232 _unlock:
1233 snd_power_unlock(card);
1234 return result;
1235 }
1236
1237 /*
1238 * reset ioctl
1239 */
1240 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1241 {
1242 struct snd_pcm_runtime *runtime = substream->runtime;
1243 switch (runtime->status->state) {
1244 case SNDRV_PCM_STATE_RUNNING:
1245 case SNDRV_PCM_STATE_PREPARED:
1246 case SNDRV_PCM_STATE_PAUSED:
1247 case SNDRV_PCM_STATE_SUSPENDED:
1248 return 0;
1249 default:
1250 return -EBADFD;
1251 }
1252 }
1253
1254 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1255 {
1256 struct snd_pcm_runtime *runtime = substream->runtime;
1257 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1258 if (err < 0)
1259 return err;
1260 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1261 runtime->hw_ptr_base = 0;
1262 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1263 runtime->status->hw_ptr % runtime->period_size;
1264 runtime->silence_start = runtime->status->hw_ptr;
1265 runtime->silence_filled = 0;
1266 return 0;
1267 }
1268
1269 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1270 {
1271 struct snd_pcm_runtime *runtime = substream->runtime;
1272 runtime->control->appl_ptr = runtime->status->hw_ptr;
1273 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1274 runtime->silence_size > 0)
1275 snd_pcm_playback_silence(substream, ULONG_MAX);
1276 }
1277
1278 static struct action_ops snd_pcm_action_reset = {
1279 .pre_action = snd_pcm_pre_reset,
1280 .do_action = snd_pcm_do_reset,
1281 .post_action = snd_pcm_post_reset
1282 };
1283
1284 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1285 {
1286 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1287 }
1288
1289 /*
1290 * prepare ioctl
1291 */
1292 /* we use the second argument for updating f_flags */
1293 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1294 int f_flags)
1295 {
1296 struct snd_pcm_runtime *runtime = substream->runtime;
1297 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1298 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1299 return -EBADFD;
1300 if (snd_pcm_running(substream))
1301 return -EBUSY;
1302 substream->f_flags = f_flags;
1303 return 0;
1304 }
1305
1306 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1307 {
1308 int err;
1309 err = substream->ops->prepare(substream);
1310 if (err < 0)
1311 return err;
1312 return snd_pcm_do_reset(substream, 0);
1313 }
1314
1315 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1316 {
1317 struct snd_pcm_runtime *runtime = substream->runtime;
1318 runtime->control->appl_ptr = runtime->status->hw_ptr;
1319 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1320 }
1321
1322 static struct action_ops snd_pcm_action_prepare = {
1323 .pre_action = snd_pcm_pre_prepare,
1324 .do_action = snd_pcm_do_prepare,
1325 .post_action = snd_pcm_post_prepare
1326 };
1327
1328 /**
1329 * snd_pcm_prepare
1330 * @substream: the PCM substream instance
1331 * @file: file to refer f_flags
1332 *
1333 * Prepare the PCM substream to be triggerable.
1334 */
1335 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1336 struct file *file)
1337 {
1338 int res;
1339 struct snd_card *card = substream->pcm->card;
1340 int f_flags;
1341
1342 if (file)
1343 f_flags = file->f_flags;
1344 else
1345 f_flags = substream->f_flags;
1346
1347 snd_power_lock(card);
1348 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1349 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1350 substream, f_flags);
1351 snd_power_unlock(card);
1352 return res;
1353 }
1354
1355 /*
1356 * drain ioctl
1357 */
1358
1359 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1360 {
1361 if (substream->f_flags & O_NONBLOCK)
1362 return -EAGAIN;
1363 substream->runtime->trigger_master = substream;
1364 return 0;
1365 }
1366
1367 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1368 {
1369 struct snd_pcm_runtime *runtime = substream->runtime;
1370 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1371 switch (runtime->status->state) {
1372 case SNDRV_PCM_STATE_PREPARED:
1373 /* start playback stream if possible */
1374 if (! snd_pcm_playback_empty(substream)) {
1375 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1376 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1377 }
1378 break;
1379 case SNDRV_PCM_STATE_RUNNING:
1380 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1381 break;
1382 default:
1383 break;
1384 }
1385 } else {
1386 /* stop running stream */
1387 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1388 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1389 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1390 snd_pcm_do_stop(substream, new_state);
1391 snd_pcm_post_stop(substream, new_state);
1392 }
1393 }
1394 return 0;
1395 }
1396
1397 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1398 {
1399 }
1400
1401 static struct action_ops snd_pcm_action_drain_init = {
1402 .pre_action = snd_pcm_pre_drain_init,
1403 .do_action = snd_pcm_do_drain_init,
1404 .post_action = snd_pcm_post_drain_init
1405 };
1406
1407 struct drain_rec {
1408 struct snd_pcm_substream *substream;
1409 wait_queue_t wait;
1410 snd_pcm_uframes_t stop_threshold;
1411 };
1412
1413 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1414
1415 /*
1416 * Drain the stream(s).
1417 * When the substream is linked, sync until the draining of all playback streams
1418 * is finished.
1419 * After this call, all streams are supposed to be either SETUP or DRAINING
1420 * (capture only) state.
1421 */
1422 static int snd_pcm_drain(struct snd_pcm_substream *substream)
1423 {
1424 struct snd_card *card;
1425 struct snd_pcm_runtime *runtime;
1426 struct snd_pcm_substream *s;
1427 int result = 0;
1428 int i, num_drecs;
1429 struct drain_rec *drec, drec_tmp, *d;
1430
1431 snd_assert(substream != NULL, return -ENXIO);
1432 card = substream->pcm->card;
1433 runtime = substream->runtime;
1434
1435 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1436 return -EBADFD;
1437
1438 snd_power_lock(card);
1439 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1440 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1441 if (result < 0) {
1442 snd_power_unlock(card);
1443 return result;
1444 }
1445 }
1446
1447 /* allocate temporary record for drain sync */
1448 down_read(&snd_pcm_link_rwsem);
1449 if (snd_pcm_stream_linked(substream)) {
1450 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1451 if (! drec) {
1452 up_read(&snd_pcm_link_rwsem);
1453 snd_power_unlock(card);
1454 return -ENOMEM;
1455 }
1456 } else
1457 drec = &drec_tmp;
1458
1459 /* count only playback streams */
1460 num_drecs = 0;
1461 snd_pcm_group_for_each_entry(s, substream) {
1462 runtime = s->runtime;
1463 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1464 d = &drec[num_drecs++];
1465 d->substream = s;
1466 init_waitqueue_entry(&d->wait, current);
1467 add_wait_queue(&runtime->sleep, &d->wait);
1468 /* stop_threshold fixup to avoid endless loop when
1469 * stop_threshold > buffer_size
1470 */
1471 d->stop_threshold = runtime->stop_threshold;
1472 if (runtime->stop_threshold > runtime->buffer_size)
1473 runtime->stop_threshold = runtime->buffer_size;
1474 }
1475 }
1476 up_read(&snd_pcm_link_rwsem);
1477
1478 snd_pcm_stream_lock_irq(substream);
1479 /* resume pause */
1480 if (substream->runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1481 snd_pcm_pause(substream, 0);
1482
1483 /* pre-start/stop - all running streams are changed to DRAINING state */
1484 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1485 if (result < 0) {
1486 snd_pcm_stream_unlock_irq(substream);
1487 goto _error;
1488 }
1489
1490 for (;;) {
1491 long tout;
1492 if (signal_pending(current)) {
1493 result = -ERESTARTSYS;
1494 break;
1495 }
1496 /* all finished? */
1497 for (i = 0; i < num_drecs; i++) {
1498 runtime = drec[i].substream->runtime;
1499 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1500 break;
1501 }
1502 if (i == num_drecs)
1503 break; /* yes, all drained */
1504
1505 set_current_state(TASK_INTERRUPTIBLE);
1506 snd_pcm_stream_unlock_irq(substream);
1507 snd_power_unlock(card);
1508 tout = schedule_timeout(10 * HZ);
1509 snd_power_lock(card);
1510 snd_pcm_stream_lock_irq(substream);
1511 if (tout == 0) {
1512 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1513 result = -ESTRPIPE;
1514 else {
1515 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1516 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1517 result = -EIO;
1518 }
1519 break;
1520 }
1521 }
1522
1523 snd_pcm_stream_unlock_irq(substream);
1524
1525 _error:
1526 for (i = 0; i < num_drecs; i++) {
1527 d = &drec[i];
1528 runtime = d->substream->runtime;
1529 remove_wait_queue(&runtime->sleep, &d->wait);
1530 runtime->stop_threshold = d->stop_threshold;
1531 }
1532
1533 if (drec != &drec_tmp)
1534 kfree(drec);
1535 snd_power_unlock(card);
1536
1537 return result;
1538 }
1539
1540 /*
1541 * drop ioctl
1542 *
1543 * Immediately put all linked substreams into SETUP state.
1544 */
1545 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1546 {
1547 struct snd_pcm_runtime *runtime;
1548 struct snd_card *card;
1549 int result = 0;
1550
1551 snd_assert(substream != NULL, return -ENXIO);
1552 runtime = substream->runtime;
1553 card = substream->pcm->card;
1554
1555 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1556 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1557 return -EBADFD;
1558
1559 snd_power_lock(card);
1560 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1561 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1562 if (result < 0)
1563 goto _unlock;
1564 }
1565
1566 snd_pcm_stream_lock_irq(substream);
1567 /* resume pause */
1568 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1569 snd_pcm_pause(substream, 0);
1570
1571 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1572 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1573 snd_pcm_stream_unlock_irq(substream);
1574 _unlock:
1575 snd_power_unlock(card);
1576 return result;
1577 }
1578
1579
1580 /* WARNING: Don't forget to fput back the file */
1581 static struct file *snd_pcm_file_fd(int fd)
1582 {
1583 struct file *file;
1584 struct inode *inode;
1585 unsigned int minor;
1586
1587 file = fget(fd);
1588 if (!file)
1589 return NULL;
1590 inode = file->f_path.dentry->d_inode;
1591 if (!S_ISCHR(inode->i_mode) ||
1592 imajor(inode) != snd_major) {
1593 fput(file);
1594 return NULL;
1595 }
1596 minor = iminor(inode);
1597 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1598 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1599 fput(file);
1600 return NULL;
1601 }
1602 return file;
1603 }
1604
1605 /*
1606 * PCM link handling
1607 */
1608 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1609 {
1610 int res = 0;
1611 struct file *file;
1612 struct snd_pcm_file *pcm_file;
1613 struct snd_pcm_substream *substream1;
1614
1615 file = snd_pcm_file_fd(fd);
1616 if (!file)
1617 return -EBADFD;
1618 pcm_file = file->private_data;
1619 substream1 = pcm_file->substream;
1620 down_write(&snd_pcm_link_rwsem);
1621 write_lock_irq(&snd_pcm_link_rwlock);
1622 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1623 substream->runtime->status->state != substream1->runtime->status->state) {
1624 res = -EBADFD;
1625 goto _end;
1626 }
1627 if (snd_pcm_stream_linked(substream1)) {
1628 res = -EALREADY;
1629 goto _end;
1630 }
1631 if (!snd_pcm_stream_linked(substream)) {
1632 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1633 if (substream->group == NULL) {
1634 res = -ENOMEM;
1635 goto _end;
1636 }
1637 spin_lock_init(&substream->group->lock);
1638 INIT_LIST_HEAD(&substream->group->substreams);
1639 list_add_tail(&substream->link_list, &substream->group->substreams);
1640 substream->group->count = 1;
1641 }
1642 list_add_tail(&substream1->link_list, &substream->group->substreams);
1643 substream->group->count++;
1644 substream1->group = substream->group;
1645 _end:
1646 write_unlock_irq(&snd_pcm_link_rwlock);
1647 up_write(&snd_pcm_link_rwsem);
1648 fput(file);
1649 return res;
1650 }
1651
1652 static void relink_to_local(struct snd_pcm_substream *substream)
1653 {
1654 substream->group = &substream->self_group;
1655 INIT_LIST_HEAD(&substream->self_group.substreams);
1656 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1657 }
1658
1659 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1660 {
1661 struct snd_pcm_substream *s;
1662 int res = 0;
1663
1664 down_write(&snd_pcm_link_rwsem);
1665 write_lock_irq(&snd_pcm_link_rwlock);
1666 if (!snd_pcm_stream_linked(substream)) {
1667 res = -EALREADY;
1668 goto _end;
1669 }
1670 list_del(&substream->link_list);
1671 substream->group->count--;
1672 if (substream->group->count == 1) { /* detach the last stream, too */
1673 snd_pcm_group_for_each_entry(s, substream) {
1674 relink_to_local(s);
1675 break;
1676 }
1677 kfree(substream->group);
1678 }
1679 relink_to_local(substream);
1680 _end:
1681 write_unlock_irq(&snd_pcm_link_rwlock);
1682 up_write(&snd_pcm_link_rwsem);
1683 return res;
1684 }
1685
1686 /*
1687 * hw configurator
1688 */
1689 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1690 struct snd_pcm_hw_rule *rule)
1691 {
1692 struct snd_interval t;
1693 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1694 hw_param_interval_c(params, rule->deps[1]), &t);
1695 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1696 }
1697
1698 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1699 struct snd_pcm_hw_rule *rule)
1700 {
1701 struct snd_interval t;
1702 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1703 hw_param_interval_c(params, rule->deps[1]), &t);
1704 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1705 }
1706
1707 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1708 struct snd_pcm_hw_rule *rule)
1709 {
1710 struct snd_interval t;
1711 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1712 hw_param_interval_c(params, rule->deps[1]),
1713 (unsigned long) rule->private, &t);
1714 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1715 }
1716
1717 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1718 struct snd_pcm_hw_rule *rule)
1719 {
1720 struct snd_interval t;
1721 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1722 (unsigned long) rule->private,
1723 hw_param_interval_c(params, rule->deps[1]), &t);
1724 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1725 }
1726
1727 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1728 struct snd_pcm_hw_rule *rule)
1729 {
1730 unsigned int k;
1731 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1732 struct snd_mask m;
1733 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1734 snd_mask_any(&m);
1735 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1736 int bits;
1737 if (! snd_mask_test(mask, k))
1738 continue;
1739 bits = snd_pcm_format_physical_width(k);
1740 if (bits <= 0)
1741 continue; /* ignore invalid formats */
1742 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1743 snd_mask_reset(&m, k);
1744 }
1745 return snd_mask_refine(mask, &m);
1746 }
1747
1748 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1749 struct snd_pcm_hw_rule *rule)
1750 {
1751 struct snd_interval t;
1752 unsigned int k;
1753 t.min = UINT_MAX;
1754 t.max = 0;
1755 t.openmin = 0;
1756 t.openmax = 0;
1757 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1758 int bits;
1759 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1760 continue;
1761 bits = snd_pcm_format_physical_width(k);
1762 if (bits <= 0)
1763 continue; /* ignore invalid formats */
1764 if (t.min > (unsigned)bits)
1765 t.min = bits;
1766 if (t.max < (unsigned)bits)
1767 t.max = bits;
1768 }
1769 t.integer = 1;
1770 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1771 }
1772
1773 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1774 #error "Change this table"
1775 #endif
1776
1777 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1778 48000, 64000, 88200, 96000, 176400, 192000 };
1779
1780 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1781 .count = ARRAY_SIZE(rates),
1782 .list = rates,
1783 };
1784
1785 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1786 struct snd_pcm_hw_rule *rule)
1787 {
1788 struct snd_pcm_hardware *hw = rule->private;
1789 return snd_interval_list(hw_param_interval(params, rule->var),
1790 snd_pcm_known_rates.count,
1791 snd_pcm_known_rates.list, hw->rates);
1792 }
1793
1794 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1795 struct snd_pcm_hw_rule *rule)
1796 {
1797 struct snd_interval t;
1798 struct snd_pcm_substream *substream = rule->private;
1799 t.min = 0;
1800 t.max = substream->buffer_bytes_max;
1801 t.openmin = 0;
1802 t.openmax = 0;
1803 t.integer = 1;
1804 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1805 }
1806
1807 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1808 {
1809 struct snd_pcm_runtime *runtime = substream->runtime;
1810 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1811 int k, err;
1812
1813 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1814 snd_mask_any(constrs_mask(constrs, k));
1815 }
1816
1817 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1818 snd_interval_any(constrs_interval(constrs, k));
1819 }
1820
1821 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1822 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1823 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1824 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1825 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1826
1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1828 snd_pcm_hw_rule_format, NULL,
1829 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1830 if (err < 0)
1831 return err;
1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1833 snd_pcm_hw_rule_sample_bits, NULL,
1834 SNDRV_PCM_HW_PARAM_FORMAT,
1835 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1836 if (err < 0)
1837 return err;
1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1839 snd_pcm_hw_rule_div, NULL,
1840 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1841 if (err < 0)
1842 return err;
1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1844 snd_pcm_hw_rule_mul, NULL,
1845 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1846 if (err < 0)
1847 return err;
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1849 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1850 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1851 if (err < 0)
1852 return err;
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1854 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1855 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1856 if (err < 0)
1857 return err;
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1859 snd_pcm_hw_rule_div, NULL,
1860 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1861 if (err < 0)
1862 return err;
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1864 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1865 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1866 if (err < 0)
1867 return err;
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1869 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1870 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1871 if (err < 0)
1872 return err;
1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1874 snd_pcm_hw_rule_div, NULL,
1875 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1876 if (err < 0)
1877 return err;
1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1879 snd_pcm_hw_rule_div, NULL,
1880 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1881 if (err < 0)
1882 return err;
1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1884 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1885 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1886 if (err < 0)
1887 return err;
1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1889 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1890 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1891 if (err < 0)
1892 return err;
1893 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1894 snd_pcm_hw_rule_mul, NULL,
1895 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1896 if (err < 0)
1897 return err;
1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1899 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1900 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1901 if (err < 0)
1902 return err;
1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1904 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1905 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1906 if (err < 0)
1907 return err;
1908 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1909 snd_pcm_hw_rule_muldivk, (void*) 8,
1910 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1911 if (err < 0)
1912 return err;
1913 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1914 snd_pcm_hw_rule_muldivk, (void*) 8,
1915 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1916 if (err < 0)
1917 return err;
1918 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1919 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1920 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1921 if (err < 0)
1922 return err;
1923 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1924 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1925 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1926 if (err < 0)
1927 return err;
1928 return 0;
1929 }
1930
1931 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1932 {
1933 struct snd_pcm_runtime *runtime = substream->runtime;
1934 struct snd_pcm_hardware *hw = &runtime->hw;
1935 int err;
1936 unsigned int mask = 0;
1937
1938 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1939 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1940 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1941 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1942 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1943 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1944 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1945 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1946 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1947 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1948 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1949 }
1950 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1951 snd_assert(err >= 0, return -EINVAL);
1952
1953 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1954 snd_assert(err >= 0, return -EINVAL);
1955
1956 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1957 snd_assert(err >= 0, return -EINVAL);
1958
1959 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1960 hw->channels_min, hw->channels_max);
1961 snd_assert(err >= 0, return -EINVAL);
1962
1963 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1964 hw->rate_min, hw->rate_max);
1965 snd_assert(err >= 0, return -EINVAL);
1966
1967 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1968 hw->period_bytes_min, hw->period_bytes_max);
1969 snd_assert(err >= 0, return -EINVAL);
1970
1971 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1972 hw->periods_min, hw->periods_max);
1973 snd_assert(err >= 0, return -EINVAL);
1974
1975 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1976 hw->period_bytes_min, hw->buffer_bytes_max);
1977 snd_assert(err >= 0, return -EINVAL);
1978
1979 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1980 snd_pcm_hw_rule_buffer_bytes_max, substream,
1981 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1982 if (err < 0)
1983 return err;
1984
1985 /* FIXME: remove */
1986 if (runtime->dma_bytes) {
1987 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1988 snd_assert(err >= 0, return -EINVAL);
1989 }
1990
1991 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1992 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1993 snd_pcm_hw_rule_rate, hw,
1994 SNDRV_PCM_HW_PARAM_RATE, -1);
1995 if (err < 0)
1996 return err;
1997 }
1998
1999 /* FIXME: this belong to lowlevel */
2000 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
2001 1000000 / HZ, 1000000 / HZ);
2002 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2003
2004 return 0;
2005 }
2006
2007 static void pcm_release_private(struct snd_pcm_substream *substream)
2008 {
2009 snd_pcm_unlink(substream);
2010 }
2011
2012 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2013 {
2014 substream->ref_count--;
2015 if (substream->ref_count > 0)
2016 return;
2017
2018 snd_pcm_drop(substream);
2019 if (substream->hw_opened) {
2020 if (substream->ops->hw_free != NULL)
2021 substream->ops->hw_free(substream);
2022 substream->ops->close(substream);
2023 substream->hw_opened = 0;
2024 }
2025 if (substream->pcm_release) {
2026 substream->pcm_release(substream);
2027 substream->pcm_release = NULL;
2028 }
2029 snd_pcm_detach_substream(substream);
2030 }
2031
2032 EXPORT_SYMBOL(snd_pcm_release_substream);
2033
2034 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2035 struct file *file,
2036 struct snd_pcm_substream **rsubstream)
2037 {
2038 struct snd_pcm_substream *substream;
2039 int err;
2040
2041 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2042 if (err < 0)
2043 return err;
2044 if (substream->ref_count > 1) {
2045 *rsubstream = substream;
2046 return 0;
2047 }
2048
2049 err = snd_pcm_hw_constraints_init(substream);
2050 if (err < 0) {
2051 snd_printd("snd_pcm_hw_constraints_init failed\n");
2052 goto error;
2053 }
2054
2055 if ((err = substream->ops->open(substream)) < 0)
2056 goto error;
2057
2058 substream->hw_opened = 1;
2059
2060 err = snd_pcm_hw_constraints_complete(substream);
2061 if (err < 0) {
2062 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2063 goto error;
2064 }
2065
2066 *rsubstream = substream;
2067 return 0;
2068
2069 error:
2070 snd_pcm_release_substream(substream);
2071 return err;
2072 }
2073
2074 EXPORT_SYMBOL(snd_pcm_open_substream);
2075
2076 static int snd_pcm_open_file(struct file *file,
2077 struct snd_pcm *pcm,
2078 int stream,
2079 struct snd_pcm_file **rpcm_file)
2080 {
2081 struct snd_pcm_file *pcm_file;
2082 struct snd_pcm_substream *substream;
2083 struct snd_pcm_str *str;
2084 int err;
2085
2086 snd_assert(rpcm_file != NULL, return -EINVAL);
2087 *rpcm_file = NULL;
2088
2089 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2090 if (err < 0)
2091 return err;
2092
2093 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2094 if (pcm_file == NULL) {
2095 snd_pcm_release_substream(substream);
2096 return -ENOMEM;
2097 }
2098 pcm_file->substream = substream;
2099 if (substream->ref_count == 1) {
2100 str = substream->pstr;
2101 substream->file = pcm_file;
2102 substream->pcm_release = pcm_release_private;
2103 }
2104 file->private_data = pcm_file;
2105 *rpcm_file = pcm_file;
2106 return 0;
2107 }
2108
2109 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2110 {
2111 struct snd_pcm *pcm;
2112
2113 pcm = snd_lookup_minor_data(iminor(inode),
2114 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2115 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2116 }
2117
2118 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2119 {
2120 struct snd_pcm *pcm;
2121
2122 pcm = snd_lookup_minor_data(iminor(inode),
2123 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2124 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2125 }
2126
2127 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2128 {
2129 int err;
2130 struct snd_pcm_file *pcm_file;
2131 wait_queue_t wait;
2132
2133 if (pcm == NULL) {
2134 err = -ENODEV;
2135 goto __error1;
2136 }
2137 err = snd_card_file_add(pcm->card, file);
2138 if (err < 0)
2139 goto __error1;
2140 if (!try_module_get(pcm->card->module)) {
2141 err = -EFAULT;
2142 goto __error2;
2143 }
2144 init_waitqueue_entry(&wait, current);
2145 add_wait_queue(&pcm->open_wait, &wait);
2146 mutex_lock(&pcm->open_mutex);
2147 while (1) {
2148 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2149 if (err >= 0)
2150 break;
2151 if (err == -EAGAIN) {
2152 if (file->f_flags & O_NONBLOCK) {
2153 err = -EBUSY;
2154 break;
2155 }
2156 } else
2157 break;
2158 set_current_state(TASK_INTERRUPTIBLE);
2159 mutex_unlock(&pcm->open_mutex);
2160 schedule();
2161 mutex_lock(&pcm->open_mutex);
2162 if (signal_pending(current)) {
2163 err = -ERESTARTSYS;
2164 break;
2165 }
2166 }
2167 remove_wait_queue(&pcm->open_wait, &wait);
2168 mutex_unlock(&pcm->open_mutex);
2169 if (err < 0)
2170 goto __error;
2171 return err;
2172
2173 __error:
2174 module_put(pcm->card->module);
2175 __error2:
2176 snd_card_file_remove(pcm->card, file);
2177 __error1:
2178 return err;
2179 }
2180
2181 static int snd_pcm_release(struct inode *inode, struct file *file)
2182 {
2183 struct snd_pcm *pcm;
2184 struct snd_pcm_substream *substream;
2185 struct snd_pcm_file *pcm_file;
2186
2187 pcm_file = file->private_data;
2188 substream = pcm_file->substream;
2189 snd_assert(substream != NULL, return -ENXIO);
2190 pcm = substream->pcm;
2191 fasync_helper(-1, file, 0, &substream->runtime->fasync);
2192 mutex_lock(&pcm->open_mutex);
2193 snd_pcm_release_substream(substream);
2194 kfree(pcm_file);
2195 mutex_unlock(&pcm->open_mutex);
2196 wake_up(&pcm->open_wait);
2197 module_put(pcm->card->module);
2198 snd_card_file_remove(pcm->card, file);
2199 return 0;
2200 }
2201
2202 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2203 snd_pcm_uframes_t frames)
2204 {
2205 struct snd_pcm_runtime *runtime = substream->runtime;
2206 snd_pcm_sframes_t appl_ptr;
2207 snd_pcm_sframes_t ret;
2208 snd_pcm_sframes_t hw_avail;
2209
2210 if (frames == 0)
2211 return 0;
2212
2213 snd_pcm_stream_lock_irq(substream);
2214 switch (runtime->status->state) {
2215 case SNDRV_PCM_STATE_PREPARED:
2216 break;
2217 case SNDRV_PCM_STATE_DRAINING:
2218 case SNDRV_PCM_STATE_RUNNING:
2219 if (snd_pcm_update_hw_ptr(substream) >= 0)
2220 break;
2221 /* Fall through */
2222 case SNDRV_PCM_STATE_XRUN:
2223 ret = -EPIPE;
2224 goto __end;
2225 default:
2226 ret = -EBADFD;
2227 goto __end;
2228 }
2229
2230 hw_avail = snd_pcm_playback_hw_avail(runtime);
2231 if (hw_avail <= 0) {
2232 ret = 0;
2233 goto __end;
2234 }
2235 if (frames > (snd_pcm_uframes_t)hw_avail)
2236 frames = hw_avail;
2237 appl_ptr = runtime->control->appl_ptr - frames;
2238 if (appl_ptr < 0)
2239 appl_ptr += runtime->boundary;
2240 runtime->control->appl_ptr = appl_ptr;
2241 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2242 runtime->sleep_min)
2243 snd_pcm_tick_prepare(substream);
2244 ret = frames;
2245 __end:
2246 snd_pcm_stream_unlock_irq(substream);
2247 return ret;
2248 }
2249
2250 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2251 snd_pcm_uframes_t frames)
2252 {
2253 struct snd_pcm_runtime *runtime = substream->runtime;
2254 snd_pcm_sframes_t appl_ptr;
2255 snd_pcm_sframes_t ret;
2256 snd_pcm_sframes_t hw_avail;
2257
2258 if (frames == 0)
2259 return 0;
2260
2261 snd_pcm_stream_lock_irq(substream);
2262 switch (runtime->status->state) {
2263 case SNDRV_PCM_STATE_PREPARED:
2264 case SNDRV_PCM_STATE_DRAINING:
2265 break;
2266 case SNDRV_PCM_STATE_RUNNING:
2267 if (snd_pcm_update_hw_ptr(substream) >= 0)
2268 break;
2269 /* Fall through */
2270 case SNDRV_PCM_STATE_XRUN:
2271 ret = -EPIPE;
2272 goto __end;
2273 default:
2274 ret = -EBADFD;
2275 goto __end;
2276 }
2277
2278 hw_avail = snd_pcm_capture_hw_avail(runtime);
2279 if (hw_avail <= 0) {
2280 ret = 0;
2281 goto __end;
2282 }
2283 if (frames > (snd_pcm_uframes_t)hw_avail)
2284 frames = hw_avail;
2285 appl_ptr = runtime->control->appl_ptr - frames;
2286 if (appl_ptr < 0)
2287 appl_ptr += runtime->boundary;
2288 runtime->control->appl_ptr = appl_ptr;
2289 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2290 runtime->sleep_min)
2291 snd_pcm_tick_prepare(substream);
2292 ret = frames;
2293 __end:
2294 snd_pcm_stream_unlock_irq(substream);
2295 return ret;
2296 }
2297
2298 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2299 snd_pcm_uframes_t frames)
2300 {
2301 struct snd_pcm_runtime *runtime = substream->runtime;
2302 snd_pcm_sframes_t appl_ptr;
2303 snd_pcm_sframes_t ret;
2304 snd_pcm_sframes_t avail;
2305
2306 if (frames == 0)
2307 return 0;
2308
2309 snd_pcm_stream_lock_irq(substream);
2310 switch (runtime->status->state) {
2311 case SNDRV_PCM_STATE_PREPARED:
2312 case SNDRV_PCM_STATE_PAUSED:
2313 break;
2314 case SNDRV_PCM_STATE_DRAINING:
2315 case SNDRV_PCM_STATE_RUNNING:
2316 if (snd_pcm_update_hw_ptr(substream) >= 0)
2317 break;
2318 /* Fall through */
2319 case SNDRV_PCM_STATE_XRUN:
2320 ret = -EPIPE;
2321 goto __end;
2322 default:
2323 ret = -EBADFD;
2324 goto __end;
2325 }
2326
2327 avail = snd_pcm_playback_avail(runtime);
2328 if (avail <= 0) {
2329 ret = 0;
2330 goto __end;
2331 }
2332 if (frames > (snd_pcm_uframes_t)avail)
2333 frames = avail;
2334 appl_ptr = runtime->control->appl_ptr + frames;
2335 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2336 appl_ptr -= runtime->boundary;
2337 runtime->control->appl_ptr = appl_ptr;
2338 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2339 runtime->sleep_min)
2340 snd_pcm_tick_prepare(substream);
2341 ret = frames;
2342 __end:
2343 snd_pcm_stream_unlock_irq(substream);
2344 return ret;
2345 }
2346
2347 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2348 snd_pcm_uframes_t frames)
2349 {
2350 struct snd_pcm_runtime *runtime = substream->runtime;
2351 snd_pcm_sframes_t appl_ptr;
2352 snd_pcm_sframes_t ret;
2353 snd_pcm_sframes_t avail;
2354
2355 if (frames == 0)
2356 return 0;
2357
2358 snd_pcm_stream_lock_irq(substream);
2359 switch (runtime->status->state) {
2360 case SNDRV_PCM_STATE_PREPARED:
2361 case SNDRV_PCM_STATE_DRAINING:
2362 case SNDRV_PCM_STATE_PAUSED:
2363 break;
2364 case SNDRV_PCM_STATE_RUNNING:
2365 if (snd_pcm_update_hw_ptr(substream) >= 0)
2366 break;
2367 /* Fall through */
2368 case SNDRV_PCM_STATE_XRUN:
2369 ret = -EPIPE;
2370 goto __end;
2371 default:
2372 ret = -EBADFD;
2373 goto __end;
2374 }
2375
2376 avail = snd_pcm_capture_avail(runtime);
2377 if (avail <= 0) {
2378 ret = 0;
2379 goto __end;
2380 }
2381 if (frames > (snd_pcm_uframes_t)avail)
2382 frames = avail;
2383 appl_ptr = runtime->control->appl_ptr + frames;
2384 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2385 appl_ptr -= runtime->boundary;
2386 runtime->control->appl_ptr = appl_ptr;
2387 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2388 runtime->sleep_min)
2389 snd_pcm_tick_prepare(substream);
2390 ret = frames;
2391 __end:
2392 snd_pcm_stream_unlock_irq(substream);
2393 return ret;
2394 }
2395
2396 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2397 {
2398 struct snd_pcm_runtime *runtime = substream->runtime;
2399 int err;
2400
2401 snd_pcm_stream_lock_irq(substream);
2402 switch (runtime->status->state) {
2403 case SNDRV_PCM_STATE_DRAINING:
2404 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2405 goto __badfd;
2406 case SNDRV_PCM_STATE_RUNNING:
2407 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2408 break;
2409 /* Fall through */
2410 case SNDRV_PCM_STATE_PREPARED:
2411 case SNDRV_PCM_STATE_SUSPENDED:
2412 err = 0;
2413 break;
2414 case SNDRV_PCM_STATE_XRUN:
2415 err = -EPIPE;
2416 break;
2417 default:
2418 __badfd:
2419 err = -EBADFD;
2420 break;
2421 }
2422 snd_pcm_stream_unlock_irq(substream);
2423 return err;
2424 }
2425
2426 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2427 snd_pcm_sframes_t __user *res)
2428 {
2429 struct snd_pcm_runtime *runtime = substream->runtime;
2430 int err;
2431 snd_pcm_sframes_t n = 0;
2432
2433 snd_pcm_stream_lock_irq(substream);
2434 switch (runtime->status->state) {
2435 case SNDRV_PCM_STATE_DRAINING:
2436 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2437 goto __badfd;
2438 case SNDRV_PCM_STATE_RUNNING:
2439 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2440 break;
2441 /* Fall through */
2442 case SNDRV_PCM_STATE_PREPARED:
2443 case SNDRV_PCM_STATE_SUSPENDED:
2444 err = 0;
2445 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2446 n = snd_pcm_playback_hw_avail(runtime);
2447 else
2448 n = snd_pcm_capture_avail(runtime);
2449 break;
2450 case SNDRV_PCM_STATE_XRUN:
2451 err = -EPIPE;
2452 break;
2453 default:
2454 __badfd:
2455 err = -EBADFD;
2456 break;
2457 }
2458 snd_pcm_stream_unlock_irq(substream);
2459 if (!err)
2460 if (put_user(n, res))
2461 err = -EFAULT;
2462 return err;
2463 }
2464
2465 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2466 struct snd_pcm_sync_ptr __user *_sync_ptr)
2467 {
2468 struct snd_pcm_runtime *runtime = substream->runtime;
2469 struct snd_pcm_sync_ptr sync_ptr;
2470 volatile struct snd_pcm_mmap_status *status;
2471 volatile struct snd_pcm_mmap_control *control;
2472 int err;
2473
2474 memset(&sync_ptr, 0, sizeof(sync_ptr));
2475 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2476 return -EFAULT;
2477 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2478 return -EFAULT;
2479 status = runtime->status;
2480 control = runtime->control;
2481 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2482 err = snd_pcm_hwsync(substream);
2483 if (err < 0)
2484 return err;
2485 }
2486 snd_pcm_stream_lock_irq(substream);
2487 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2488 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2489 else
2490 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2491 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2492 control->avail_min = sync_ptr.c.control.avail_min;
2493 else
2494 sync_ptr.c.control.avail_min = control->avail_min;
2495 sync_ptr.s.status.state = status->state;
2496 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2497 sync_ptr.s.status.tstamp = status->tstamp;
2498 sync_ptr.s.status.suspended_state = status->suspended_state;
2499 snd_pcm_stream_unlock_irq(substream);
2500 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2501 return -EFAULT;
2502 return 0;
2503 }
2504
2505 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2506 {
2507 struct snd_pcm_runtime *runtime = substream->runtime;
2508 int arg;
2509
2510 if (get_user(arg, _arg))
2511 return -EFAULT;
2512 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2513 return -EINVAL;
2514 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2515 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2516 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2517 return 0;
2518 }
2519
2520 static int snd_pcm_common_ioctl1(struct file *file,
2521 struct snd_pcm_substream *substream,
2522 unsigned int cmd, void __user *arg)
2523 {
2524 snd_assert(substream != NULL, return -ENXIO);
2525
2526 switch (cmd) {
2527 case SNDRV_PCM_IOCTL_PVERSION:
2528 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2529 case SNDRV_PCM_IOCTL_INFO:
2530 return snd_pcm_info_user(substream, arg);
2531 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2532 return 0;
2533 case SNDRV_PCM_IOCTL_TTSTAMP:
2534 return snd_pcm_tstamp(substream, arg);
2535 case SNDRV_PCM_IOCTL_HW_REFINE:
2536 return snd_pcm_hw_refine_user(substream, arg);
2537 case SNDRV_PCM_IOCTL_HW_PARAMS:
2538 return snd_pcm_hw_params_user(substream, arg);
2539 case SNDRV_PCM_IOCTL_HW_FREE:
2540 return snd_pcm_hw_free(substream);
2541 case SNDRV_PCM_IOCTL_SW_PARAMS:
2542 return snd_pcm_sw_params_user(substream, arg);
2543 case SNDRV_PCM_IOCTL_STATUS:
2544 return snd_pcm_status_user(substream, arg);
2545 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2546 return snd_pcm_channel_info_user(substream, arg);
2547 case SNDRV_PCM_IOCTL_PREPARE:
2548 return snd_pcm_prepare(substream, file);
2549 case SNDRV_PCM_IOCTL_RESET:
2550 return snd_pcm_reset(substream);
2551 case SNDRV_PCM_IOCTL_START:
2552 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2553 case SNDRV_PCM_IOCTL_LINK:
2554 return snd_pcm_link(substream, (int)(unsigned long) arg);
2555 case SNDRV_PCM_IOCTL_UNLINK:
2556 return snd_pcm_unlink(substream);
2557 case SNDRV_PCM_IOCTL_RESUME:
2558 return snd_pcm_resume(substream);
2559 case SNDRV_PCM_IOCTL_XRUN:
2560 return snd_pcm_xrun(substream);
2561 case SNDRV_PCM_IOCTL_HWSYNC:
2562 return snd_pcm_hwsync(substream);
2563 case SNDRV_PCM_IOCTL_DELAY:
2564 return snd_pcm_delay(substream, arg);
2565 case SNDRV_PCM_IOCTL_SYNC_PTR:
2566 return snd_pcm_sync_ptr(substream, arg);
2567 #ifdef CONFIG_SND_SUPPORT_OLD_API
2568 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2569 return snd_pcm_hw_refine_old_user(substream, arg);
2570 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2571 return snd_pcm_hw_params_old_user(substream, arg);
2572 #endif
2573 case SNDRV_PCM_IOCTL_DRAIN:
2574 return snd_pcm_drain(substream);
2575 case SNDRV_PCM_IOCTL_DROP:
2576 return snd_pcm_drop(substream);
2577 case SNDRV_PCM_IOCTL_PAUSE:
2578 {
2579 int res;
2580 snd_pcm_stream_lock_irq(substream);
2581 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2582 snd_pcm_stream_unlock_irq(substream);
2583 return res;
2584 }
2585 }
2586 snd_printd("unknown ioctl = 0x%x\n", cmd);
2587 return -ENOTTY;
2588 }
2589
2590 static int snd_pcm_playback_ioctl1(struct file *file,
2591 struct snd_pcm_substream *substream,
2592 unsigned int cmd, void __user *arg)
2593 {
2594 snd_assert(substream != NULL, return -ENXIO);
2595 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2596 switch (cmd) {
2597 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2598 {
2599 struct snd_xferi xferi;
2600 struct snd_xferi __user *_xferi = arg;
2601 struct snd_pcm_runtime *runtime = substream->runtime;
2602 snd_pcm_sframes_t result;
2603 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2604 return -EBADFD;
2605 if (put_user(0, &_xferi->result))
2606 return -EFAULT;
2607 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2608 return -EFAULT;
2609 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2610 __put_user(result, &_xferi->result);
2611 return result < 0 ? result : 0;
2612 }
2613 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2614 {
2615 struct snd_xfern xfern;
2616 struct snd_xfern __user *_xfern = arg;
2617 struct snd_pcm_runtime *runtime = substream->runtime;
2618 void __user **bufs;
2619 snd_pcm_sframes_t result;
2620 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2621 return -EBADFD;
2622 if (runtime->channels > 128)
2623 return -EINVAL;
2624 if (put_user(0, &_xfern->result))
2625 return -EFAULT;
2626 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2627 return -EFAULT;
2628 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2629 if (bufs == NULL)
2630 return -ENOMEM;
2631 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2632 kfree(bufs);
2633 return -EFAULT;
2634 }
2635 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2636 kfree(bufs);
2637 __put_user(result, &_xfern->result);
2638 return result < 0 ? result : 0;
2639 }
2640 case SNDRV_PCM_IOCTL_REWIND:
2641 {
2642 snd_pcm_uframes_t frames;
2643 snd_pcm_uframes_t __user *_frames = arg;
2644 snd_pcm_sframes_t result;
2645 if (get_user(frames, _frames))
2646 return -EFAULT;
2647 if (put_user(0, _frames))
2648 return -EFAULT;
2649 result = snd_pcm_playback_rewind(substream, frames);
2650 __put_user(result, _frames);
2651 return result < 0 ? result : 0;
2652 }
2653 case SNDRV_PCM_IOCTL_FORWARD:
2654 {
2655 snd_pcm_uframes_t frames;
2656 snd_pcm_uframes_t __user *_frames = arg;
2657 snd_pcm_sframes_t result;
2658 if (get_user(frames, _frames))
2659 return -EFAULT;
2660 if (put_user(0, _frames))
2661 return -EFAULT;
2662 result = snd_pcm_playback_forward(substream, frames);
2663 __put_user(result, _frames);
2664 return result < 0 ? result : 0;
2665 }
2666 }
2667 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2668 }
2669
2670 static int snd_pcm_capture_ioctl1(struct file *file,
2671 struct snd_pcm_substream *substream,
2672 unsigned int cmd, void __user *arg)
2673 {
2674 snd_assert(substream != NULL, return -ENXIO);
2675 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2676 switch (cmd) {
2677 case SNDRV_PCM_IOCTL_READI_FRAMES:
2678 {
2679 struct snd_xferi xferi;
2680 struct snd_xferi __user *_xferi = arg;
2681 struct snd_pcm_runtime *runtime = substream->runtime;
2682 snd_pcm_sframes_t result;
2683 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2684 return -EBADFD;
2685 if (put_user(0, &_xferi->result))
2686 return -EFAULT;
2687 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2688 return -EFAULT;
2689 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2690 __put_user(result, &_xferi->result);
2691 return result < 0 ? result : 0;
2692 }
2693 case SNDRV_PCM_IOCTL_READN_FRAMES:
2694 {
2695 struct snd_xfern xfern;
2696 struct snd_xfern __user *_xfern = arg;
2697 struct snd_pcm_runtime *runtime = substream->runtime;
2698 void *bufs;
2699 snd_pcm_sframes_t result;
2700 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2701 return -EBADFD;
2702 if (runtime->channels > 128)
2703 return -EINVAL;
2704 if (put_user(0, &_xfern->result))
2705 return -EFAULT;
2706 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2707 return -EFAULT;
2708 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2709 if (bufs == NULL)
2710 return -ENOMEM;
2711 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2712 kfree(bufs);
2713 return -EFAULT;
2714 }
2715 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2716 kfree(bufs);
2717 __put_user(result, &_xfern->result);
2718 return result < 0 ? result : 0;
2719 }
2720 case SNDRV_PCM_IOCTL_REWIND:
2721 {
2722 snd_pcm_uframes_t frames;
2723 snd_pcm_uframes_t __user *_frames = arg;
2724 snd_pcm_sframes_t result;
2725 if (get_user(frames, _frames))
2726 return -EFAULT;
2727 if (put_user(0, _frames))
2728 return -EFAULT;
2729 result = snd_pcm_capture_rewind(substream, frames);
2730 __put_user(result, _frames);
2731 return result < 0 ? result : 0;
2732 }
2733 case SNDRV_PCM_IOCTL_FORWARD:
2734 {
2735 snd_pcm_uframes_t frames;
2736 snd_pcm_uframes_t __user *_frames = arg;
2737 snd_pcm_sframes_t result;
2738 if (get_user(frames, _frames))
2739 return -EFAULT;
2740 if (put_user(0, _frames))
2741 return -EFAULT;
2742 result = snd_pcm_capture_forward(substream, frames);
2743 __put_user(result, _frames);
2744 return result < 0 ? result : 0;
2745 }
2746 }
2747 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2748 }
2749
2750 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2751 unsigned long arg)
2752 {
2753 struct snd_pcm_file *pcm_file;
2754
2755 pcm_file = file->private_data;
2756
2757 if (((cmd >> 8) & 0xff) != 'A')
2758 return -ENOTTY;
2759
2760 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2761 (void __user *)arg);
2762 }
2763
2764 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2765 unsigned long arg)
2766 {
2767 struct snd_pcm_file *pcm_file;
2768
2769 pcm_file = file->private_data;
2770
2771 if (((cmd >> 8) & 0xff) != 'A')
2772 return -ENOTTY;
2773
2774 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2775 (void __user *)arg);
2776 }
2777
2778 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2779 unsigned int cmd, void *arg)
2780 {
2781 mm_segment_t fs;
2782 int result;
2783
2784 fs = snd_enter_user();
2785 switch (substream->stream) {
2786 case SNDRV_PCM_STREAM_PLAYBACK:
2787 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2788 (void __user *)arg);
2789 break;
2790 case SNDRV_PCM_STREAM_CAPTURE:
2791 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2792 (void __user *)arg);
2793 break;
2794 default:
2795 result = -EINVAL;
2796 break;
2797 }
2798 snd_leave_user(fs);
2799 return result;
2800 }
2801
2802 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2803
2804 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2805 loff_t * offset)
2806 {
2807 struct snd_pcm_file *pcm_file;
2808 struct snd_pcm_substream *substream;
2809 struct snd_pcm_runtime *runtime;
2810 snd_pcm_sframes_t result;
2811
2812 pcm_file = file->private_data;
2813 substream = pcm_file->substream;
2814 snd_assert(substream != NULL, return -ENXIO);
2815 runtime = substream->runtime;
2816 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2817 return -EBADFD;
2818 if (!frame_aligned(runtime, count))
2819 return -EINVAL;
2820 count = bytes_to_frames(runtime, count);
2821 result = snd_pcm_lib_read(substream, buf, count);
2822 if (result > 0)
2823 result = frames_to_bytes(runtime, result);
2824 return result;
2825 }
2826
2827 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2828 size_t count, loff_t * offset)
2829 {
2830 struct snd_pcm_file *pcm_file;
2831 struct snd_pcm_substream *substream;
2832 struct snd_pcm_runtime *runtime;
2833 snd_pcm_sframes_t result;
2834
2835 pcm_file = file->private_data;
2836 substream = pcm_file->substream;
2837 snd_assert(substream != NULL, result = -ENXIO; goto end);
2838 runtime = substream->runtime;
2839 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2840 result = -EBADFD;
2841 goto end;
2842 }
2843 if (!frame_aligned(runtime, count)) {
2844 result = -EINVAL;
2845 goto end;
2846 }
2847 count = bytes_to_frames(runtime, count);
2848 result = snd_pcm_lib_write(substream, buf, count);
2849 if (result > 0)
2850 result = frames_to_bytes(runtime, result);
2851 end:
2852 return result;
2853 }
2854
2855 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2856 unsigned long nr_segs, loff_t pos)
2857
2858 {
2859 struct snd_pcm_file *pcm_file;
2860 struct snd_pcm_substream *substream;
2861 struct snd_pcm_runtime *runtime;
2862 snd_pcm_sframes_t result;
2863 unsigned long i;
2864 void __user **bufs;
2865 snd_pcm_uframes_t frames;
2866
2867 pcm_file = iocb->ki_filp->private_data;
2868 substream = pcm_file->substream;
2869 snd_assert(substream != NULL, return -ENXIO);
2870 runtime = substream->runtime;
2871 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2872 return -EBADFD;
2873 if (nr_segs > 1024 || nr_segs != runtime->channels)
2874 return -EINVAL;
2875 if (!frame_aligned(runtime, iov->iov_len))
2876 return -EINVAL;
2877 frames = bytes_to_samples(runtime, iov->iov_len);
2878 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2879 if (bufs == NULL)
2880 return -ENOMEM;
2881 for (i = 0; i < nr_segs; ++i)
2882 bufs[i] = iov[i].iov_base;
2883 result = snd_pcm_lib_readv(substream, bufs, frames);
2884 if (result > 0)
2885 result = frames_to_bytes(runtime, result);
2886 kfree(bufs);
2887 return result;
2888 }
2889
2890 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2891 unsigned long nr_segs, loff_t pos)
2892 {
2893 struct snd_pcm_file *pcm_file;
2894 struct snd_pcm_substream *substream;
2895 struct snd_pcm_runtime *runtime;
2896 snd_pcm_sframes_t result;
2897 unsigned long i;
2898 void __user **bufs;
2899 snd_pcm_uframes_t frames;
2900
2901 pcm_file = iocb->ki_filp->private_data;
2902 substream = pcm_file->substream;
2903 snd_assert(substream != NULL, result = -ENXIO; goto end);
2904 runtime = substream->runtime;
2905 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2906 result = -EBADFD;
2907 goto end;
2908 }
2909 if (nr_segs > 128 || nr_segs != runtime->channels ||
2910 !frame_aligned(runtime, iov->iov_len)) {
2911 result = -EINVAL;
2912 goto end;
2913 }
2914 frames = bytes_to_samples(runtime, iov->iov_len);
2915 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2916 if (bufs == NULL)
2917 return -ENOMEM;
2918 for (i = 0; i < nr_segs; ++i)
2919 bufs[i] = iov[i].iov_base;
2920 result = snd_pcm_lib_writev(substream, bufs, frames);
2921 if (result > 0)
2922 result = frames_to_bytes(runtime, result);
2923 kfree(bufs);
2924 end:
2925 return result;
2926 }
2927
2928 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2929 {
2930 struct snd_pcm_file *pcm_file;
2931 struct snd_pcm_substream *substream;
2932 struct snd_pcm_runtime *runtime;
2933 unsigned int mask;
2934 snd_pcm_uframes_t avail;
2935
2936 pcm_file = file->private_data;
2937
2938 substream = pcm_file->substream;
2939 snd_assert(substream != NULL, return -ENXIO);
2940 runtime = substream->runtime;
2941
2942 poll_wait(file, &runtime->sleep, wait);
2943
2944 snd_pcm_stream_lock_irq(substream);
2945 avail = snd_pcm_playback_avail(runtime);
2946 switch (runtime->status->state) {
2947 case SNDRV_PCM_STATE_RUNNING:
2948 case SNDRV_PCM_STATE_PREPARED:
2949 case SNDRV_PCM_STATE_PAUSED:
2950 if (avail >= runtime->control->avail_min) {
2951 mask = POLLOUT | POLLWRNORM;
2952 break;
2953 }
2954 /* Fall through */
2955 case SNDRV_PCM_STATE_DRAINING:
2956 mask = 0;
2957 break;
2958 default:
2959 mask = POLLOUT | POLLWRNORM | POLLERR;
2960 break;
2961 }
2962 snd_pcm_stream_unlock_irq(substream);
2963 return mask;
2964 }
2965
2966 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2967 {
2968 struct snd_pcm_file *pcm_file;
2969 struct snd_pcm_substream *substream;
2970 struct snd_pcm_runtime *runtime;
2971 unsigned int mask;
2972 snd_pcm_uframes_t avail;
2973
2974 pcm_file = file->private_data;
2975
2976 substream = pcm_file->substream;
2977 snd_assert(substream != NULL, return -ENXIO);
2978 runtime = substream->runtime;
2979
2980 poll_wait(file, &runtime->sleep, wait);
2981
2982 snd_pcm_stream_lock_irq(substream);
2983 avail = snd_pcm_capture_avail(runtime);
2984 switch (runtime->status->state) {
2985 case SNDRV_PCM_STATE_RUNNING:
2986 case SNDRV_PCM_STATE_PREPARED:
2987 case SNDRV_PCM_STATE_PAUSED:
2988 if (avail >= runtime->control->avail_min) {
2989 mask = POLLIN | POLLRDNORM;
2990 break;
2991 }
2992 mask = 0;
2993 break;
2994 case SNDRV_PCM_STATE_DRAINING:
2995 if (avail > 0) {
2996 mask = POLLIN | POLLRDNORM;
2997 break;
2998 }
2999 /* Fall through */
3000 default:
3001 mask = POLLIN | POLLRDNORM | POLLERR;
3002 break;
3003 }
3004 snd_pcm_stream_unlock_irq(substream);
3005 return mask;
3006 }
3007
3008 /*
3009 * mmap support
3010 */
3011
3012 /*
3013 * Only on coherent architectures, we can mmap the status and the control records
3014 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3015 */
3016 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3017 /*
3018 * mmap status record
3019 */
3020 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3021 struct vm_fault *vmf)
3022 {
3023 struct snd_pcm_substream *substream = area->vm_private_data;
3024 struct snd_pcm_runtime *runtime;
3025
3026 if (substream == NULL)
3027 return VM_FAULT_SIGBUS;
3028 runtime = substream->runtime;
3029 vmf->page = virt_to_page(runtime->status);
3030 get_page(vmf->page);
3031 return 0;
3032 }
3033
3034 static struct vm_operations_struct snd_pcm_vm_ops_status =
3035 {
3036 .fault = snd_pcm_mmap_status_fault,
3037 };
3038
3039 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3040 struct vm_area_struct *area)
3041 {
3042 struct snd_pcm_runtime *runtime;
3043 long size;
3044 if (!(area->vm_flags & VM_READ))
3045 return -EINVAL;
3046 runtime = substream->runtime;
3047 snd_assert(runtime != NULL, return -EAGAIN);
3048 size = area->vm_end - area->vm_start;
3049 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3050 return -EINVAL;
3051 area->vm_ops = &snd_pcm_vm_ops_status;
3052 area->vm_private_data = substream;
3053 area->vm_flags |= VM_RESERVED;
3054 return 0;
3055 }
3056
3057 /*
3058 * mmap control record
3059 */
3060 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3061 struct vm_fault *vmf)
3062 {
3063 struct snd_pcm_substream *substream = area->vm_private_data;
3064 struct snd_pcm_runtime *runtime;
3065
3066 if (substream == NULL)
3067 return VM_FAULT_SIGBUS;
3068 runtime = substream->runtime;
3069 vmf->page = virt_to_page(runtime->control);
3070 get_page(vmf->page);
3071 return 0;
3072 }
3073
3074 static struct vm_operations_struct snd_pcm_vm_ops_control =
3075 {
3076 .fault = snd_pcm_mmap_control_fault,
3077 };
3078
3079 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3080 struct vm_area_struct *area)
3081 {
3082 struct snd_pcm_runtime *runtime;
3083 long size;
3084 if (!(area->vm_flags & VM_READ))
3085 return -EINVAL;
3086 runtime = substream->runtime;
3087 snd_assert(runtime != NULL, return -EAGAIN);
3088 size = area->vm_end - area->vm_start;
3089 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3090 return -EINVAL;
3091 area->vm_ops = &snd_pcm_vm_ops_control;
3092 area->vm_private_data = substream;
3093 area->vm_flags |= VM_RESERVED;
3094 return 0;
3095 }
3096 #else /* ! coherent mmap */
3097 /*
3098 * don't support mmap for status and control records.
3099 */
3100 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3101 struct vm_area_struct *area)
3102 {
3103 return -ENXIO;
3104 }
3105 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3106 struct vm_area_struct *area)
3107 {
3108 return -ENXIO;
3109 }
3110 #endif /* coherent mmap */
3111
3112 /*
3113 * fault callback for mmapping a RAM page
3114 */
3115 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3116 struct vm_fault *vmf)
3117 {
3118 struct snd_pcm_substream *substream = area->vm_private_data;
3119 struct snd_pcm_runtime *runtime;
3120 unsigned long offset;
3121 struct page * page;
3122 void *vaddr;
3123 size_t dma_bytes;
3124
3125 if (substream == NULL)
3126 return VM_FAULT_SIGBUS;
3127 runtime = substream->runtime;
3128 offset = vmf->pgoff << PAGE_SHIFT;
3129 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3130 if (offset > dma_bytes - PAGE_SIZE)
3131 return VM_FAULT_SIGBUS;
3132 if (substream->ops->page) {
3133 page = substream->ops->page(substream, offset);
3134 if (!page)
3135 return VM_FAULT_SIGBUS;
3136 } else {
3137 vaddr = runtime->dma_area + offset;
3138 page = virt_to_page(vaddr);
3139 }
3140 get_page(page);
3141 vmf->page = page;
3142 return 0;
3143 }
3144
3145 static struct vm_operations_struct snd_pcm_vm_ops_data =
3146 {
3147 .open = snd_pcm_mmap_data_open,
3148 .close = snd_pcm_mmap_data_close,
3149 .fault = snd_pcm_mmap_data_fault,
3150 };
3151
3152 /*
3153 * mmap the DMA buffer on RAM
3154 */
3155 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3156 struct vm_area_struct *area)
3157 {
3158 area->vm_ops = &snd_pcm_vm_ops_data;
3159 area->vm_private_data = substream;
3160 area->vm_flags |= VM_RESERVED;
3161 atomic_inc(&substream->mmap_count);
3162 return 0;
3163 }
3164
3165 /*
3166 * mmap the DMA buffer on I/O memory area
3167 */
3168 #if SNDRV_PCM_INFO_MMAP_IOMEM
3169 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3170 {
3171 .open = snd_pcm_mmap_data_open,
3172 .close = snd_pcm_mmap_data_close,
3173 };
3174
3175 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3176 struct vm_area_struct *area)
3177 {
3178 long size;
3179 unsigned long offset;
3180
3181 #ifdef pgprot_noncached
3182 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3183 #endif
3184 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3185 area->vm_private_data = substream;
3186 area->vm_flags |= VM_IO;
3187 size = area->vm_end - area->vm_start;
3188 offset = area->vm_pgoff << PAGE_SHIFT;
3189 if (io_remap_pfn_range(area, area->vm_start,
3190 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3191 size, area->vm_page_prot))
3192 return -EAGAIN;
3193 atomic_inc(&substream->mmap_count);
3194 return 0;
3195 }
3196
3197 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3198 #endif /* SNDRV_PCM_INFO_MMAP */
3199
3200 /*
3201 * mmap DMA buffer
3202 */
3203 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3204 struct vm_area_struct *area)
3205 {
3206 struct snd_pcm_runtime *runtime;
3207 long size;
3208 unsigned long offset;
3209 size_t dma_bytes;
3210
3211 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3212 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3213 return -EINVAL;
3214 } else {
3215 if (!(area->vm_flags & VM_READ))
3216 return -EINVAL;
3217 }
3218 runtime = substream->runtime;
3219 snd_assert(runtime != NULL, return -EAGAIN);
3220 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3221 return -EBADFD;
3222 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3223 return -ENXIO;
3224 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3225 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3226 return -EINVAL;
3227 size = area->vm_end - area->vm_start;
3228 offset = area->vm_pgoff << PAGE_SHIFT;
3229 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3230 if ((size_t)size > dma_bytes)
3231 return -EINVAL;
3232 if (offset > dma_bytes - size)
3233 return -EINVAL;
3234
3235 if (substream->ops->mmap)
3236 return substream->ops->mmap(substream, area);
3237 else
3238 return snd_pcm_default_mmap(substream, area);
3239 }
3240
3241 EXPORT_SYMBOL(snd_pcm_mmap_data);
3242
3243 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3244 {
3245 struct snd_pcm_file * pcm_file;
3246 struct snd_pcm_substream *substream;
3247 unsigned long offset;
3248
3249 pcm_file = file->private_data;
3250 substream = pcm_file->substream;
3251 snd_assert(substream != NULL, return -ENXIO);
3252
3253 offset = area->vm_pgoff << PAGE_SHIFT;
3254 switch (offset) {
3255 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3256 if (pcm_file->no_compat_mmap)
3257 return -ENXIO;
3258 return snd_pcm_mmap_status(substream, file, area);
3259 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3260 if (pcm_file->no_compat_mmap)
3261 return -ENXIO;
3262 return snd_pcm_mmap_control(substream, file, area);
3263 default:
3264 return snd_pcm_mmap_data(substream, file, area);
3265 }
3266 return 0;
3267 }
3268
3269 static int snd_pcm_fasync(int fd, struct file * file, int on)
3270 {
3271 struct snd_pcm_file * pcm_file;
3272 struct snd_pcm_substream *substream;
3273 struct snd_pcm_runtime *runtime;
3274 int err;
3275
3276 pcm_file = file->private_data;
3277 substream = pcm_file->substream;
3278 snd_assert(substream != NULL, return -ENXIO);
3279 runtime = substream->runtime;
3280
3281 err = fasync_helper(fd, file, on, &runtime->fasync);
3282 if (err < 0)
3283 return err;
3284 return 0;
3285 }
3286
3287 /*
3288 * ioctl32 compat
3289 */
3290 #ifdef CONFIG_COMPAT
3291 #include "pcm_compat.c"
3292 #else
3293 #define snd_pcm_ioctl_compat NULL
3294 #endif
3295
3296 /*
3297 * To be removed helpers to keep binary compatibility
3298 */
3299
3300 #ifdef CONFIG_SND_SUPPORT_OLD_API
3301 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3302 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3303
3304 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3305 struct snd_pcm_hw_params_old *oparams)
3306 {
3307 unsigned int i;
3308
3309 memset(params, 0, sizeof(*params));
3310 params->flags = oparams->flags;
3311 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3312 params->masks[i].bits[0] = oparams->masks[i];
3313 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3314 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3315 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3316 params->info = oparams->info;
3317 params->msbits = oparams->msbits;
3318 params->rate_num = oparams->rate_num;
3319 params->rate_den = oparams->rate_den;
3320 params->fifo_size = oparams->fifo_size;
3321 }
3322
3323 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3324 struct snd_pcm_hw_params *params)
3325 {
3326 unsigned int i;
3327
3328 memset(oparams, 0, sizeof(*oparams));
3329 oparams->flags = params->flags;
3330 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3331 oparams->masks[i] = params->masks[i].bits[0];
3332 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3333 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3334 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3335 oparams->info = params->info;
3336 oparams->msbits = params->msbits;
3337 oparams->rate_num = params->rate_num;
3338 oparams->rate_den = params->rate_den;
3339 oparams->fifo_size = params->fifo_size;
3340 }
3341
3342 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3343 struct snd_pcm_hw_params_old __user * _oparams)
3344 {
3345 struct snd_pcm_hw_params *params;
3346 struct snd_pcm_hw_params_old *oparams = NULL;
3347 int err;
3348
3349 params = kmalloc(sizeof(*params), GFP_KERNEL);
3350 if (!params) {
3351 err = -ENOMEM;
3352 goto out;
3353 }
3354 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3355 if (!oparams) {
3356 err = -ENOMEM;
3357 goto out;
3358 }
3359
3360 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3361 err = -EFAULT;
3362 goto out;
3363 }
3364 snd_pcm_hw_convert_from_old_params(params, oparams);
3365 err = snd_pcm_hw_refine(substream, params);
3366 snd_pcm_hw_convert_to_old_params(oparams, params);
3367 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3368 if (!err)
3369 err = -EFAULT;
3370 }
3371 out:
3372 kfree(params);
3373 kfree(oparams);
3374 return err;
3375 }
3376
3377 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3378 struct snd_pcm_hw_params_old __user * _oparams)
3379 {
3380 struct snd_pcm_hw_params *params;
3381 struct snd_pcm_hw_params_old *oparams = NULL;
3382 int err;
3383
3384 params = kmalloc(sizeof(*params), GFP_KERNEL);
3385 if (!params) {
3386 err = -ENOMEM;
3387 goto out;
3388 }
3389 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3390 if (!oparams) {
3391 err = -ENOMEM;
3392 goto out;
3393 }
3394 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3395 err = -EFAULT;
3396 goto out;
3397 }
3398 snd_pcm_hw_convert_from_old_params(params, oparams);
3399 err = snd_pcm_hw_params(substream, params);
3400 snd_pcm_hw_convert_to_old_params(oparams, params);
3401 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3402 if (!err)
3403 err = -EFAULT;
3404 }
3405 out:
3406 kfree(params);
3407 kfree(oparams);
3408 return err;
3409 }
3410 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3411
3412 /*
3413 * Register section
3414 */
3415
3416 const struct file_operations snd_pcm_f_ops[2] = {
3417 {
3418 .owner = THIS_MODULE,
3419 .write = snd_pcm_write,
3420 .aio_write = snd_pcm_aio_write,
3421 .open = snd_pcm_playback_open,
3422 .release = snd_pcm_release,
3423 .poll = snd_pcm_playback_poll,
3424 .unlocked_ioctl = snd_pcm_playback_ioctl,
3425 .compat_ioctl = snd_pcm_ioctl_compat,
3426 .mmap = snd_pcm_mmap,
3427 .fasync = snd_pcm_fasync,
3428 },
3429 {
3430 .owner = THIS_MODULE,
3431 .read = snd_pcm_read,
3432 .aio_read = snd_pcm_aio_read,
3433 .open = snd_pcm_capture_open,
3434 .release = snd_pcm_release,
3435 .poll = snd_pcm_capture_poll,
3436 .unlocked_ioctl = snd_pcm_capture_ioctl,
3437 .compat_ioctl = snd_pcm_ioctl_compat,
3438 .mmap = snd_pcm_mmap,
3439 .fasync = snd_pcm_fasync,
3440 }
3441 };
Linux kernel - Deliverables
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