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