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[ALSA] Move OSS-specific hw_params helper to snd-pcm-oss module
[deliverable/linux.git] / sound / core / pcm_native.c
1 /*
2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <sound/driver.h>
23 #include <linux/mm.h>
24 #include <linux/smp_lock.h>
25 #include <linux/file.h>
26 #include <linux/slab.h>
27 #include <linux/time.h>
28 #include <linux/uio.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include <sound/info.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/timer.h>
35 #include <sound/minors.h>
36 #include <asm/io.h>
37
38 /*
39 * Compatibility
40 */
41
42 struct snd_pcm_hw_params_old {
43 unsigned int flags;
44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45 SNDRV_PCM_HW_PARAM_ACCESS + 1];
46 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
48 unsigned int rmask;
49 unsigned int cmask;
50 unsigned int info;
51 unsigned int msbits;
52 unsigned int rate_num;
53 unsigned int rate_den;
54 snd_pcm_uframes_t fifo_size;
55 unsigned char reserved[64];
56 };
57
58 #ifdef CONFIG_SND_SUPPORT_OLD_API
59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
61
62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63 struct snd_pcm_hw_params_old __user * _oparams);
64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
66 #endif
67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
68
69 /*
70 *
71 */
72
73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
75
76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
77
78 static inline mm_segment_t snd_enter_user(void)
79 {
80 mm_segment_t fs = get_fs();
81 set_fs(get_ds());
82 return fs;
83 }
84
85 static inline void snd_leave_user(mm_segment_t fs)
86 {
87 set_fs(fs);
88 }
89
90
91
92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
93 {
94 struct snd_pcm_runtime *runtime;
95 struct snd_pcm *pcm = substream->pcm;
96 struct snd_pcm_str *pstr = substream->pstr;
97
98 snd_assert(substream != NULL, return -ENXIO);
99 memset(info, 0, sizeof(*info));
100 info->card = pcm->card->number;
101 info->device = pcm->device;
102 info->stream = substream->stream;
103 info->subdevice = substream->number;
104 strlcpy(info->id, pcm->id, sizeof(info->id));
105 strlcpy(info->name, pcm->name, sizeof(info->name));
106 info->dev_class = pcm->dev_class;
107 info->dev_subclass = pcm->dev_subclass;
108 info->subdevices_count = pstr->substream_count;
109 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
110 strlcpy(info->subname, substream->name, sizeof(info->subname));
111 runtime = substream->runtime;
112 /* AB: FIXME!!! This is definitely nonsense */
113 if (runtime) {
114 info->sync = runtime->sync;
115 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
116 }
117 return 0;
118 }
119
120 int snd_pcm_info_user(struct snd_pcm_substream *substream,
121 struct snd_pcm_info __user * _info)
122 {
123 struct snd_pcm_info *info;
124 int err;
125
126 info = kmalloc(sizeof(*info), GFP_KERNEL);
127 if (! info)
128 return -ENOMEM;
129 err = snd_pcm_info(substream, info);
130 if (err >= 0) {
131 if (copy_to_user(_info, info, sizeof(*info)))
132 err = -EFAULT;
133 }
134 kfree(info);
135 return err;
136 }
137
138 #undef RULES_DEBUG
139
140 #ifdef RULES_DEBUG
141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
142 char *snd_pcm_hw_param_names[] = {
143 HW_PARAM(ACCESS),
144 HW_PARAM(FORMAT),
145 HW_PARAM(SUBFORMAT),
146 HW_PARAM(SAMPLE_BITS),
147 HW_PARAM(FRAME_BITS),
148 HW_PARAM(CHANNELS),
149 HW_PARAM(RATE),
150 HW_PARAM(PERIOD_TIME),
151 HW_PARAM(PERIOD_SIZE),
152 HW_PARAM(PERIOD_BYTES),
153 HW_PARAM(PERIODS),
154 HW_PARAM(BUFFER_TIME),
155 HW_PARAM(BUFFER_SIZE),
156 HW_PARAM(BUFFER_BYTES),
157 HW_PARAM(TICK_TIME),
158 };
159 #endif
160
161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
162 struct snd_pcm_hw_params *params)
163 {
164 unsigned int k;
165 struct snd_pcm_hardware *hw;
166 struct snd_interval *i = NULL;
167 struct snd_mask *m = NULL;
168 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
169 unsigned int rstamps[constrs->rules_num];
170 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
171 unsigned int stamp = 2;
172 int changed, again;
173
174 params->info = 0;
175 params->fifo_size = 0;
176 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
177 params->msbits = 0;
178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
179 params->rate_num = 0;
180 params->rate_den = 0;
181 }
182
183 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
184 m = hw_param_mask(params, k);
185 if (snd_mask_empty(m))
186 return -EINVAL;
187 if (!(params->rmask & (1 << k)))
188 continue;
189 #ifdef RULES_DEBUG
190 printk("%s = ", snd_pcm_hw_param_names[k]);
191 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
192 #endif
193 changed = snd_mask_refine(m, constrs_mask(constrs, k));
194 #ifdef RULES_DEBUG
195 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
196 #endif
197 if (changed)
198 params->cmask |= 1 << k;
199 if (changed < 0)
200 return changed;
201 }
202
203 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
204 i = hw_param_interval(params, k);
205 if (snd_interval_empty(i))
206 return -EINVAL;
207 if (!(params->rmask & (1 << k)))
208 continue;
209 #ifdef RULES_DEBUG
210 printk("%s = ", snd_pcm_hw_param_names[k]);
211 if (i->empty)
212 printk("empty");
213 else
214 printk("%c%u %u%c",
215 i->openmin ? '(' : '[', i->min,
216 i->max, i->openmax ? ')' : ']');
217 printk(" -> ");
218 #endif
219 changed = snd_interval_refine(i, constrs_interval(constrs, k));
220 #ifdef RULES_DEBUG
221 if (i->empty)
222 printk("empty\n");
223 else
224 printk("%c%u %u%c\n",
225 i->openmin ? '(' : '[', i->min,
226 i->max, i->openmax ? ')' : ']');
227 #endif
228 if (changed)
229 params->cmask |= 1 << k;
230 if (changed < 0)
231 return changed;
232 }
233
234 for (k = 0; k < constrs->rules_num; k++)
235 rstamps[k] = 0;
236 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
237 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
238 do {
239 again = 0;
240 for (k = 0; k < constrs->rules_num; k++) {
241 struct snd_pcm_hw_rule *r = &constrs->rules[k];
242 unsigned int d;
243 int doit = 0;
244 if (r->cond && !(r->cond & params->flags))
245 continue;
246 for (d = 0; r->deps[d] >= 0; d++) {
247 if (vstamps[r->deps[d]] > rstamps[k]) {
248 doit = 1;
249 break;
250 }
251 }
252 if (!doit)
253 continue;
254 #ifdef RULES_DEBUG
255 printk("Rule %d [%p]: ", k, r->func);
256 if (r->var >= 0) {
257 printk("%s = ", snd_pcm_hw_param_names[r->var]);
258 if (hw_is_mask(r->var)) {
259 m = hw_param_mask(params, r->var);
260 printk("%x", *m->bits);
261 } else {
262 i = hw_param_interval(params, r->var);
263 if (i->empty)
264 printk("empty");
265 else
266 printk("%c%u %u%c",
267 i->openmin ? '(' : '[', i->min,
268 i->max, i->openmax ? ')' : ']');
269 }
270 }
271 #endif
272 changed = r->func(params, r);
273 #ifdef RULES_DEBUG
274 if (r->var >= 0) {
275 printk(" -> ");
276 if (hw_is_mask(r->var))
277 printk("%x", *m->bits);
278 else {
279 if (i->empty)
280 printk("empty");
281 else
282 printk("%c%u %u%c",
283 i->openmin ? '(' : '[', i->min,
284 i->max, i->openmax ? ')' : ']');
285 }
286 }
287 printk("\n");
288 #endif
289 rstamps[k] = stamp;
290 if (changed && r->var >= 0) {
291 params->cmask |= (1 << r->var);
292 vstamps[r->var] = stamp;
293 again = 1;
294 }
295 if (changed < 0)
296 return changed;
297 stamp++;
298 }
299 } while (again);
300 if (!params->msbits) {
301 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
302 if (snd_interval_single(i))
303 params->msbits = snd_interval_value(i);
304 }
305
306 if (!params->rate_den) {
307 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
308 if (snd_interval_single(i)) {
309 params->rate_num = snd_interval_value(i);
310 params->rate_den = 1;
311 }
312 }
313
314 hw = &substream->runtime->hw;
315 if (!params->info)
316 params->info = hw->info;
317 if (!params->fifo_size)
318 params->fifo_size = hw->fifo_size;
319 params->rmask = 0;
320 return 0;
321 }
322
323 EXPORT_SYMBOL(snd_pcm_hw_refine);
324
325 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
326 struct snd_pcm_hw_params __user * _params)
327 {
328 struct snd_pcm_hw_params *params;
329 int err;
330
331 params = kmalloc(sizeof(*params), GFP_KERNEL);
332 if (!params) {
333 err = -ENOMEM;
334 goto out;
335 }
336 if (copy_from_user(params, _params, sizeof(*params))) {
337 err = -EFAULT;
338 goto out;
339 }
340 err = snd_pcm_hw_refine(substream, params);
341 if (copy_to_user(_params, params, sizeof(*params))) {
342 if (!err)
343 err = -EFAULT;
344 }
345 out:
346 kfree(params);
347 return err;
348 }
349
350 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
351 struct snd_pcm_hw_params *params)
352 {
353 struct snd_pcm_runtime *runtime;
354 int err;
355 unsigned int bits;
356 snd_pcm_uframes_t frames;
357
358 snd_assert(substream != NULL, return -ENXIO);
359 runtime = substream->runtime;
360 snd_assert(runtime != NULL, return -ENXIO);
361 snd_pcm_stream_lock_irq(substream);
362 switch (runtime->status->state) {
363 case SNDRV_PCM_STATE_OPEN:
364 case SNDRV_PCM_STATE_SETUP:
365 case SNDRV_PCM_STATE_PREPARED:
366 break;
367 default:
368 snd_pcm_stream_unlock_irq(substream);
369 return -EBADFD;
370 }
371 snd_pcm_stream_unlock_irq(substream);
372 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
373 if (!substream->oss.oss)
374 #endif
375 if (atomic_read(&runtime->mmap_count))
376 return -EBADFD;
377
378 params->rmask = ~0U;
379 err = snd_pcm_hw_refine(substream, params);
380 if (err < 0)
381 goto _error;
382
383 err = snd_pcm_hw_params_choose(substream, params);
384 if (err < 0)
385 goto _error;
386
387 if (substream->ops->hw_params != NULL) {
388 err = substream->ops->hw_params(substream, params);
389 if (err < 0)
390 goto _error;
391 }
392
393 runtime->access = params_access(params);
394 runtime->format = params_format(params);
395 runtime->subformat = params_subformat(params);
396 runtime->channels = params_channels(params);
397 runtime->rate = params_rate(params);
398 runtime->period_size = params_period_size(params);
399 runtime->periods = params_periods(params);
400 runtime->buffer_size = params_buffer_size(params);
401 runtime->tick_time = params_tick_time(params);
402 runtime->info = params->info;
403 runtime->rate_num = params->rate_num;
404 runtime->rate_den = params->rate_den;
405
406 bits = snd_pcm_format_physical_width(runtime->format);
407 runtime->sample_bits = bits;
408 bits *= runtime->channels;
409 runtime->frame_bits = bits;
410 frames = 1;
411 while (bits % 8 != 0) {
412 bits *= 2;
413 frames *= 2;
414 }
415 runtime->byte_align = bits / 8;
416 runtime->min_align = frames;
417
418 /* Default sw params */
419 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
420 runtime->period_step = 1;
421 runtime->sleep_min = 0;
422 runtime->control->avail_min = runtime->period_size;
423 runtime->xfer_align = runtime->period_size;
424 runtime->start_threshold = 1;
425 runtime->stop_threshold = runtime->buffer_size;
426 runtime->silence_threshold = 0;
427 runtime->silence_size = 0;
428 runtime->boundary = runtime->buffer_size;
429 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
430 runtime->boundary *= 2;
431
432 snd_pcm_timer_resolution_change(substream);
433 runtime->status->state = SNDRV_PCM_STATE_SETUP;
434 return 0;
435 _error:
436 /* hardware might be unuseable from this time,
437 so we force application to retry to set
438 the correct hardware parameter settings */
439 runtime->status->state = SNDRV_PCM_STATE_OPEN;
440 if (substream->ops->hw_free != NULL)
441 substream->ops->hw_free(substream);
442 return err;
443 }
444
445 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
446 struct snd_pcm_hw_params __user * _params)
447 {
448 struct snd_pcm_hw_params *params;
449 int err;
450
451 params = kmalloc(sizeof(*params), GFP_KERNEL);
452 if (!params) {
453 err = -ENOMEM;
454 goto out;
455 }
456 if (copy_from_user(params, _params, sizeof(*params))) {
457 err = -EFAULT;
458 goto out;
459 }
460 err = snd_pcm_hw_params(substream, params);
461 if (copy_to_user(_params, params, sizeof(*params))) {
462 if (!err)
463 err = -EFAULT;
464 }
465 out:
466 kfree(params);
467 return err;
468 }
469
470 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
471 {
472 struct snd_pcm_runtime *runtime;
473 int result = 0;
474
475 snd_assert(substream != NULL, return -ENXIO);
476 runtime = substream->runtime;
477 snd_assert(runtime != NULL, return -ENXIO);
478 snd_pcm_stream_lock_irq(substream);
479 switch (runtime->status->state) {
480 case SNDRV_PCM_STATE_SETUP:
481 case SNDRV_PCM_STATE_PREPARED:
482 break;
483 default:
484 snd_pcm_stream_unlock_irq(substream);
485 return -EBADFD;
486 }
487 snd_pcm_stream_unlock_irq(substream);
488 if (atomic_read(&runtime->mmap_count))
489 return -EBADFD;
490 if (substream->ops->hw_free)
491 result = substream->ops->hw_free(substream);
492 runtime->status->state = SNDRV_PCM_STATE_OPEN;
493 return result;
494 }
495
496 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
497 struct snd_pcm_sw_params *params)
498 {
499 struct snd_pcm_runtime *runtime;
500
501 snd_assert(substream != NULL, return -ENXIO);
502 runtime = substream->runtime;
503 snd_assert(runtime != NULL, return -ENXIO);
504 snd_pcm_stream_lock_irq(substream);
505 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
506 snd_pcm_stream_unlock_irq(substream);
507 return -EBADFD;
508 }
509 snd_pcm_stream_unlock_irq(substream);
510
511 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
512 return -EINVAL;
513 if (params->avail_min == 0)
514 return -EINVAL;
515 if (params->xfer_align == 0 ||
516 params->xfer_align % runtime->min_align != 0)
517 return -EINVAL;
518 if (params->silence_size >= runtime->boundary) {
519 if (params->silence_threshold != 0)
520 return -EINVAL;
521 } else {
522 if (params->silence_size > params->silence_threshold)
523 return -EINVAL;
524 if (params->silence_threshold > runtime->buffer_size)
525 return -EINVAL;
526 }
527 snd_pcm_stream_lock_irq(substream);
528 runtime->tstamp_mode = params->tstamp_mode;
529 runtime->sleep_min = params->sleep_min;
530 runtime->period_step = params->period_step;
531 runtime->control->avail_min = params->avail_min;
532 runtime->start_threshold = params->start_threshold;
533 runtime->stop_threshold = params->stop_threshold;
534 runtime->silence_threshold = params->silence_threshold;
535 runtime->silence_size = params->silence_size;
536 runtime->xfer_align = params->xfer_align;
537 params->boundary = runtime->boundary;
538 if (snd_pcm_running(substream)) {
539 if (runtime->sleep_min)
540 snd_pcm_tick_prepare(substream);
541 else
542 snd_pcm_tick_set(substream, 0);
543 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
544 runtime->silence_size > 0)
545 snd_pcm_playback_silence(substream, ULONG_MAX);
546 wake_up(&runtime->sleep);
547 }
548 snd_pcm_stream_unlock_irq(substream);
549 return 0;
550 }
551
552 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
553 struct snd_pcm_sw_params __user * _params)
554 {
555 struct snd_pcm_sw_params params;
556 int err;
557 if (copy_from_user(&params, _params, sizeof(params)))
558 return -EFAULT;
559 err = snd_pcm_sw_params(substream, &params);
560 if (copy_to_user(_params, &params, sizeof(params)))
561 return -EFAULT;
562 return err;
563 }
564
565 int snd_pcm_status(struct snd_pcm_substream *substream,
566 struct snd_pcm_status *status)
567 {
568 struct snd_pcm_runtime *runtime = substream->runtime;
569
570 snd_pcm_stream_lock_irq(substream);
571 status->state = runtime->status->state;
572 status->suspended_state = runtime->status->suspended_state;
573 if (status->state == SNDRV_PCM_STATE_OPEN)
574 goto _end;
575 status->trigger_tstamp = runtime->trigger_tstamp;
576 if (snd_pcm_running(substream)) {
577 snd_pcm_update_hw_ptr(substream);
578 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
579 status->tstamp = runtime->status->tstamp;
580 else
581 getnstimeofday(&status->tstamp);
582 } else
583 getnstimeofday(&status->tstamp);
584 status->appl_ptr = runtime->control->appl_ptr;
585 status->hw_ptr = runtime->status->hw_ptr;
586 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
587 status->avail = snd_pcm_playback_avail(runtime);
588 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
589 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
590 status->delay = runtime->buffer_size - status->avail;
591 else
592 status->delay = 0;
593 } else {
594 status->avail = snd_pcm_capture_avail(runtime);
595 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
596 status->delay = status->avail;
597 else
598 status->delay = 0;
599 }
600 status->avail_max = runtime->avail_max;
601 status->overrange = runtime->overrange;
602 runtime->avail_max = 0;
603 runtime->overrange = 0;
604 _end:
605 snd_pcm_stream_unlock_irq(substream);
606 return 0;
607 }
608
609 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
610 struct snd_pcm_status __user * _status)
611 {
612 struct snd_pcm_status status;
613 struct snd_pcm_runtime *runtime;
614 int res;
615
616 snd_assert(substream != NULL, return -ENXIO);
617 runtime = substream->runtime;
618 memset(&status, 0, sizeof(status));
619 res = snd_pcm_status(substream, &status);
620 if (res < 0)
621 return res;
622 if (copy_to_user(_status, &status, sizeof(status)))
623 return -EFAULT;
624 return 0;
625 }
626
627 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
628 struct snd_pcm_channel_info * info)
629 {
630 struct snd_pcm_runtime *runtime;
631 unsigned int channel;
632
633 snd_assert(substream != NULL, return -ENXIO);
634 channel = info->channel;
635 runtime = substream->runtime;
636 snd_pcm_stream_lock_irq(substream);
637 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
638 snd_pcm_stream_unlock_irq(substream);
639 return -EBADFD;
640 }
641 snd_pcm_stream_unlock_irq(substream);
642 if (channel >= runtime->channels)
643 return -EINVAL;
644 memset(info, 0, sizeof(*info));
645 info->channel = channel;
646 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
647 }
648
649 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
650 struct snd_pcm_channel_info __user * _info)
651 {
652 struct snd_pcm_channel_info info;
653 int res;
654
655 if (copy_from_user(&info, _info, sizeof(info)))
656 return -EFAULT;
657 res = snd_pcm_channel_info(substream, &info);
658 if (res < 0)
659 return res;
660 if (copy_to_user(_info, &info, sizeof(info)))
661 return -EFAULT;
662 return 0;
663 }
664
665 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
666 {
667 struct snd_pcm_runtime *runtime = substream->runtime;
668 if (runtime->trigger_master == NULL)
669 return;
670 if (runtime->trigger_master == substream) {
671 getnstimeofday(&runtime->trigger_tstamp);
672 } else {
673 snd_pcm_trigger_tstamp(runtime->trigger_master);
674 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
675 }
676 runtime->trigger_master = NULL;
677 }
678
679 struct action_ops {
680 int (*pre_action)(struct snd_pcm_substream *substream, int state);
681 int (*do_action)(struct snd_pcm_substream *substream, int state);
682 void (*undo_action)(struct snd_pcm_substream *substream, int state);
683 void (*post_action)(struct snd_pcm_substream *substream, int state);
684 };
685
686 /*
687 * this functions is core for handling of linked stream
688 * Note: the stream state might be changed also on failure
689 * Note2: call with calling stream lock + link lock
690 */
691 static int snd_pcm_action_group(struct action_ops *ops,
692 struct snd_pcm_substream *substream,
693 int state, int do_lock)
694 {
695 struct list_head *pos;
696 struct snd_pcm_substream *s = NULL;
697 struct snd_pcm_substream *s1;
698 int res = 0;
699
700 snd_pcm_group_for_each(pos, substream) {
701 s = snd_pcm_group_substream_entry(pos);
702 if (do_lock && s != substream)
703 spin_lock(&s->self_group.lock);
704 res = ops->pre_action(s, state);
705 if (res < 0)
706 goto _unlock;
707 }
708 snd_pcm_group_for_each(pos, substream) {
709 s = snd_pcm_group_substream_entry(pos);
710 res = ops->do_action(s, state);
711 if (res < 0) {
712 if (ops->undo_action) {
713 snd_pcm_group_for_each(pos, substream) {
714 s1 = snd_pcm_group_substream_entry(pos);
715 if (s1 == s) /* failed stream */
716 break;
717 ops->undo_action(s1, state);
718 }
719 }
720 s = NULL; /* unlock all */
721 goto _unlock;
722 }
723 }
724 snd_pcm_group_for_each(pos, substream) {
725 s = snd_pcm_group_substream_entry(pos);
726 ops->post_action(s, state);
727 }
728 _unlock:
729 if (do_lock) {
730 /* unlock streams */
731 snd_pcm_group_for_each(pos, substream) {
732 s1 = snd_pcm_group_substream_entry(pos);
733 if (s1 != substream)
734 spin_unlock(&s1->self_group.lock);
735 if (s1 == s) /* end */
736 break;
737 }
738 }
739 return res;
740 }
741
742 /*
743 * Note: call with stream lock
744 */
745 static int snd_pcm_action_single(struct action_ops *ops,
746 struct snd_pcm_substream *substream,
747 int state)
748 {
749 int res;
750
751 res = ops->pre_action(substream, state);
752 if (res < 0)
753 return res;
754 res = ops->do_action(substream, state);
755 if (res == 0)
756 ops->post_action(substream, state);
757 else if (ops->undo_action)
758 ops->undo_action(substream, state);
759 return res;
760 }
761
762 /*
763 * Note: call with stream lock
764 */
765 static int snd_pcm_action(struct action_ops *ops,
766 struct snd_pcm_substream *substream,
767 int state)
768 {
769 int res;
770
771 if (snd_pcm_stream_linked(substream)) {
772 if (!spin_trylock(&substream->group->lock)) {
773 spin_unlock(&substream->self_group.lock);
774 spin_lock(&substream->group->lock);
775 spin_lock(&substream->self_group.lock);
776 }
777 res = snd_pcm_action_group(ops, substream, state, 1);
778 spin_unlock(&substream->group->lock);
779 } else {
780 res = snd_pcm_action_single(ops, substream, state);
781 }
782 return res;
783 }
784
785 /*
786 * Note: don't use any locks before
787 */
788 static int snd_pcm_action_lock_irq(struct action_ops *ops,
789 struct snd_pcm_substream *substream,
790 int state)
791 {
792 int res;
793
794 read_lock_irq(&snd_pcm_link_rwlock);
795 if (snd_pcm_stream_linked(substream)) {
796 spin_lock(&substream->group->lock);
797 spin_lock(&substream->self_group.lock);
798 res = snd_pcm_action_group(ops, substream, state, 1);
799 spin_unlock(&substream->self_group.lock);
800 spin_unlock(&substream->group->lock);
801 } else {
802 spin_lock(&substream->self_group.lock);
803 res = snd_pcm_action_single(ops, substream, state);
804 spin_unlock(&substream->self_group.lock);
805 }
806 read_unlock_irq(&snd_pcm_link_rwlock);
807 return res;
808 }
809
810 /*
811 */
812 static int snd_pcm_action_nonatomic(struct action_ops *ops,
813 struct snd_pcm_substream *substream,
814 int state)
815 {
816 int res;
817
818 down_read(&snd_pcm_link_rwsem);
819 if (snd_pcm_stream_linked(substream))
820 res = snd_pcm_action_group(ops, substream, state, 0);
821 else
822 res = snd_pcm_action_single(ops, substream, state);
823 up_read(&snd_pcm_link_rwsem);
824 return res;
825 }
826
827 /*
828 * start callbacks
829 */
830 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
831 {
832 struct snd_pcm_runtime *runtime = substream->runtime;
833 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
834 return -EBADFD;
835 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
836 !snd_pcm_playback_data(substream))
837 return -EPIPE;
838 runtime->trigger_master = substream;
839 return 0;
840 }
841
842 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
843 {
844 if (substream->runtime->trigger_master != substream)
845 return 0;
846 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
847 }
848
849 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
850 {
851 if (substream->runtime->trigger_master == substream)
852 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
853 }
854
855 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
856 {
857 struct snd_pcm_runtime *runtime = substream->runtime;
858 snd_pcm_trigger_tstamp(substream);
859 runtime->status->state = state;
860 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
861 runtime->silence_size > 0)
862 snd_pcm_playback_silence(substream, ULONG_MAX);
863 if (runtime->sleep_min)
864 snd_pcm_tick_prepare(substream);
865 if (substream->timer)
866 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
867 &runtime->trigger_tstamp);
868 }
869
870 static struct action_ops snd_pcm_action_start = {
871 .pre_action = snd_pcm_pre_start,
872 .do_action = snd_pcm_do_start,
873 .undo_action = snd_pcm_undo_start,
874 .post_action = snd_pcm_post_start
875 };
876
877 /**
878 * snd_pcm_start
879 * @substream: the PCM substream instance
880 *
881 * Start all linked streams.
882 */
883 int snd_pcm_start(struct snd_pcm_substream *substream)
884 {
885 return snd_pcm_action(&snd_pcm_action_start, substream,
886 SNDRV_PCM_STATE_RUNNING);
887 }
888
889 /*
890 * stop callbacks
891 */
892 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
893 {
894 struct snd_pcm_runtime *runtime = substream->runtime;
895 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
896 return -EBADFD;
897 runtime->trigger_master = substream;
898 return 0;
899 }
900
901 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
902 {
903 if (substream->runtime->trigger_master == substream &&
904 snd_pcm_running(substream))
905 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
906 return 0; /* unconditonally stop all substreams */
907 }
908
909 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
910 {
911 struct snd_pcm_runtime *runtime = substream->runtime;
912 if (runtime->status->state != state) {
913 snd_pcm_trigger_tstamp(substream);
914 if (substream->timer)
915 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
916 &runtime->trigger_tstamp);
917 runtime->status->state = state;
918 snd_pcm_tick_set(substream, 0);
919 }
920 wake_up(&runtime->sleep);
921 }
922
923 static struct action_ops snd_pcm_action_stop = {
924 .pre_action = snd_pcm_pre_stop,
925 .do_action = snd_pcm_do_stop,
926 .post_action = snd_pcm_post_stop
927 };
928
929 /**
930 * snd_pcm_stop
931 * @substream: the PCM substream instance
932 * @state: PCM state after stopping the stream
933 *
934 * Try to stop all running streams in the substream group.
935 * The state of each stream is changed to the given value after that unconditionally.
936 */
937 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
938 {
939 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
940 }
941
942 EXPORT_SYMBOL(snd_pcm_stop);
943
944 /**
945 * snd_pcm_drain_done
946 * @substream: the PCM substream
947 *
948 * Stop the DMA only when the given stream is playback.
949 * The state is changed to SETUP.
950 * Unlike snd_pcm_stop(), this affects only the given stream.
951 */
952 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
953 {
954 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
955 SNDRV_PCM_STATE_SETUP);
956 }
957
958 /*
959 * pause callbacks
960 */
961 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
962 {
963 struct snd_pcm_runtime *runtime = substream->runtime;
964 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
965 return -ENOSYS;
966 if (push) {
967 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
968 return -EBADFD;
969 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
970 return -EBADFD;
971 runtime->trigger_master = substream;
972 return 0;
973 }
974
975 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
976 {
977 if (substream->runtime->trigger_master != substream)
978 return 0;
979 return substream->ops->trigger(substream,
980 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
981 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
982 }
983
984 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
985 {
986 if (substream->runtime->trigger_master == substream)
987 substream->ops->trigger(substream,
988 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
989 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
990 }
991
992 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
993 {
994 struct snd_pcm_runtime *runtime = substream->runtime;
995 snd_pcm_trigger_tstamp(substream);
996 if (push) {
997 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
998 if (substream->timer)
999 snd_timer_notify(substream->timer,
1000 SNDRV_TIMER_EVENT_MPAUSE,
1001 &runtime->trigger_tstamp);
1002 snd_pcm_tick_set(substream, 0);
1003 wake_up(&runtime->sleep);
1004 } else {
1005 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1006 if (runtime->sleep_min)
1007 snd_pcm_tick_prepare(substream);
1008 if (substream->timer)
1009 snd_timer_notify(substream->timer,
1010 SNDRV_TIMER_EVENT_MCONTINUE,
1011 &runtime->trigger_tstamp);
1012 }
1013 }
1014
1015 static struct action_ops snd_pcm_action_pause = {
1016 .pre_action = snd_pcm_pre_pause,
1017 .do_action = snd_pcm_do_pause,
1018 .undo_action = snd_pcm_undo_pause,
1019 .post_action = snd_pcm_post_pause
1020 };
1021
1022 /*
1023 * Push/release the pause for all linked streams.
1024 */
1025 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1026 {
1027 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1028 }
1029
1030 #ifdef CONFIG_PM
1031 /* suspend */
1032
1033 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1034 {
1035 struct snd_pcm_runtime *runtime = substream->runtime;
1036 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1037 return -EBUSY;
1038 runtime->trigger_master = substream;
1039 return 0;
1040 }
1041
1042 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1043 {
1044 struct snd_pcm_runtime *runtime = substream->runtime;
1045 if (runtime->trigger_master != substream)
1046 return 0;
1047 if (! snd_pcm_running(substream))
1048 return 0;
1049 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1050 return 0; /* suspend unconditionally */
1051 }
1052
1053 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1054 {
1055 struct snd_pcm_runtime *runtime = substream->runtime;
1056 snd_pcm_trigger_tstamp(substream);
1057 if (substream->timer)
1058 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1059 &runtime->trigger_tstamp);
1060 runtime->status->suspended_state = runtime->status->state;
1061 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1062 snd_pcm_tick_set(substream, 0);
1063 wake_up(&runtime->sleep);
1064 }
1065
1066 static struct action_ops snd_pcm_action_suspend = {
1067 .pre_action = snd_pcm_pre_suspend,
1068 .do_action = snd_pcm_do_suspend,
1069 .post_action = snd_pcm_post_suspend
1070 };
1071
1072 /**
1073 * snd_pcm_suspend
1074 * @substream: the PCM substream
1075 *
1076 * Trigger SUSPEND to all linked streams.
1077 * After this call, all streams are changed to SUSPENDED state.
1078 */
1079 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1080 {
1081 int err;
1082 unsigned long flags;
1083
1084 if (! substream)
1085 return 0;
1086
1087 snd_pcm_stream_lock_irqsave(substream, flags);
1088 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1089 snd_pcm_stream_unlock_irqrestore(substream, flags);
1090 return err;
1091 }
1092
1093 EXPORT_SYMBOL(snd_pcm_suspend);
1094
1095 /**
1096 * snd_pcm_suspend_all
1097 * @pcm: the PCM instance
1098 *
1099 * Trigger SUSPEND to all substreams in the given pcm.
1100 * After this call, all streams are changed to SUSPENDED state.
1101 */
1102 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1103 {
1104 struct snd_pcm_substream *substream;
1105 int stream, err = 0;
1106
1107 if (! pcm)
1108 return 0;
1109
1110 for (stream = 0; stream < 2; stream++) {
1111 for (substream = pcm->streams[stream].substream;
1112 substream; substream = substream->next) {
1113 /* FIXME: the open/close code should lock this as well */
1114 if (substream->runtime == NULL)
1115 continue;
1116 err = snd_pcm_suspend(substream);
1117 if (err < 0 && err != -EBUSY)
1118 return err;
1119 }
1120 }
1121 return 0;
1122 }
1123
1124 EXPORT_SYMBOL(snd_pcm_suspend_all);
1125
1126 /* resume */
1127
1128 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1129 {
1130 struct snd_pcm_runtime *runtime = substream->runtime;
1131 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1132 return -ENOSYS;
1133 runtime->trigger_master = substream;
1134 return 0;
1135 }
1136
1137 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1138 {
1139 struct snd_pcm_runtime *runtime = substream->runtime;
1140 if (runtime->trigger_master != substream)
1141 return 0;
1142 /* DMA not running previously? */
1143 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1144 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1145 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1146 return 0;
1147 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1148 }
1149
1150 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1151 {
1152 if (substream->runtime->trigger_master == substream &&
1153 snd_pcm_running(substream))
1154 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1155 }
1156
1157 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1158 {
1159 struct snd_pcm_runtime *runtime = substream->runtime;
1160 snd_pcm_trigger_tstamp(substream);
1161 if (substream->timer)
1162 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1163 &runtime->trigger_tstamp);
1164 runtime->status->state = runtime->status->suspended_state;
1165 if (runtime->sleep_min)
1166 snd_pcm_tick_prepare(substream);
1167 }
1168
1169 static struct action_ops snd_pcm_action_resume = {
1170 .pre_action = snd_pcm_pre_resume,
1171 .do_action = snd_pcm_do_resume,
1172 .undo_action = snd_pcm_undo_resume,
1173 .post_action = snd_pcm_post_resume
1174 };
1175
1176 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1177 {
1178 struct snd_card *card = substream->pcm->card;
1179 int res;
1180
1181 snd_power_lock(card);
1182 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1183 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1184 snd_power_unlock(card);
1185 return res;
1186 }
1187
1188 #else
1189
1190 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1191 {
1192 return -ENOSYS;
1193 }
1194
1195 #endif /* CONFIG_PM */
1196
1197 /*
1198 * xrun ioctl
1199 *
1200 * Change the RUNNING stream(s) to XRUN state.
1201 */
1202 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1203 {
1204 struct snd_card *card = substream->pcm->card;
1205 struct snd_pcm_runtime *runtime = substream->runtime;
1206 int result;
1207
1208 snd_power_lock(card);
1209 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1210 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1211 if (result < 0)
1212 goto _unlock;
1213 }
1214
1215 snd_pcm_stream_lock_irq(substream);
1216 switch (runtime->status->state) {
1217 case SNDRV_PCM_STATE_XRUN:
1218 result = 0; /* already there */
1219 break;
1220 case SNDRV_PCM_STATE_RUNNING:
1221 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1222 break;
1223 default:
1224 result = -EBADFD;
1225 }
1226 snd_pcm_stream_unlock_irq(substream);
1227 _unlock:
1228 snd_power_unlock(card);
1229 return result;
1230 }
1231
1232 /*
1233 * reset ioctl
1234 */
1235 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1236 {
1237 struct snd_pcm_runtime *runtime = substream->runtime;
1238 switch (runtime->status->state) {
1239 case SNDRV_PCM_STATE_RUNNING:
1240 case SNDRV_PCM_STATE_PREPARED:
1241 case SNDRV_PCM_STATE_PAUSED:
1242 case SNDRV_PCM_STATE_SUSPENDED:
1243 return 0;
1244 default:
1245 return -EBADFD;
1246 }
1247 }
1248
1249 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1250 {
1251 struct snd_pcm_runtime *runtime = substream->runtime;
1252 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1253 if (err < 0)
1254 return err;
1255 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1256 runtime->hw_ptr_base = 0;
1257 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1258 runtime->status->hw_ptr % runtime->period_size;
1259 runtime->silence_start = runtime->status->hw_ptr;
1260 runtime->silence_filled = 0;
1261 return 0;
1262 }
1263
1264 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1265 {
1266 struct snd_pcm_runtime *runtime = substream->runtime;
1267 runtime->control->appl_ptr = runtime->status->hw_ptr;
1268 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1269 runtime->silence_size > 0)
1270 snd_pcm_playback_silence(substream, ULONG_MAX);
1271 }
1272
1273 static struct action_ops snd_pcm_action_reset = {
1274 .pre_action = snd_pcm_pre_reset,
1275 .do_action = snd_pcm_do_reset,
1276 .post_action = snd_pcm_post_reset
1277 };
1278
1279 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1280 {
1281 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1282 }
1283
1284 /*
1285 * prepare ioctl
1286 */
1287 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, int state)
1288 {
1289 struct snd_pcm_runtime *runtime = substream->runtime;
1290 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1291 return -EBADFD;
1292 if (snd_pcm_running(substream))
1293 return -EBUSY;
1294 return 0;
1295 }
1296
1297 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1298 {
1299 int err;
1300 err = substream->ops->prepare(substream);
1301 if (err < 0)
1302 return err;
1303 return snd_pcm_do_reset(substream, 0);
1304 }
1305
1306 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1307 {
1308 struct snd_pcm_runtime *runtime = substream->runtime;
1309 runtime->control->appl_ptr = runtime->status->hw_ptr;
1310 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1311 }
1312
1313 static struct action_ops snd_pcm_action_prepare = {
1314 .pre_action = snd_pcm_pre_prepare,
1315 .do_action = snd_pcm_do_prepare,
1316 .post_action = snd_pcm_post_prepare
1317 };
1318
1319 /**
1320 * snd_pcm_prepare
1321 * @substream: the PCM substream instance
1322 *
1323 * Prepare the PCM substream to be triggerable.
1324 */
1325 static int snd_pcm_prepare(struct snd_pcm_substream *substream)
1326 {
1327 int res;
1328 struct snd_card *card = substream->pcm->card;
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, substream, 0);
1333 snd_power_unlock(card);
1334 return res;
1335 }
1336
1337 /*
1338 * drain ioctl
1339 */
1340
1341 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1342 {
1343 if (substream->ffile->f_flags & O_NONBLOCK)
1344 return -EAGAIN;
1345 substream->runtime->trigger_master = substream;
1346 return 0;
1347 }
1348
1349 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1350 {
1351 struct snd_pcm_runtime *runtime = substream->runtime;
1352 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1353 switch (runtime->status->state) {
1354 case SNDRV_PCM_STATE_PREPARED:
1355 /* start playback stream if possible */
1356 if (! snd_pcm_playback_empty(substream)) {
1357 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1358 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1359 }
1360 break;
1361 case SNDRV_PCM_STATE_RUNNING:
1362 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1363 break;
1364 default:
1365 break;
1366 }
1367 } else {
1368 /* stop running stream */
1369 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1370 int state = snd_pcm_capture_avail(runtime) > 0 ?
1371 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1372 snd_pcm_do_stop(substream, state);
1373 snd_pcm_post_stop(substream, state);
1374 }
1375 }
1376 return 0;
1377 }
1378
1379 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1380 {
1381 }
1382
1383 static struct action_ops snd_pcm_action_drain_init = {
1384 .pre_action = snd_pcm_pre_drain_init,
1385 .do_action = snd_pcm_do_drain_init,
1386 .post_action = snd_pcm_post_drain_init
1387 };
1388
1389 struct drain_rec {
1390 struct snd_pcm_substream *substream;
1391 wait_queue_t wait;
1392 snd_pcm_uframes_t stop_threshold;
1393 };
1394
1395 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1396
1397 /*
1398 * Drain the stream(s).
1399 * When the substream is linked, sync until the draining of all playback streams
1400 * is finished.
1401 * After this call, all streams are supposed to be either SETUP or DRAINING
1402 * (capture only) state.
1403 */
1404 static int snd_pcm_drain(struct snd_pcm_substream *substream)
1405 {
1406 struct snd_card *card;
1407 struct snd_pcm_runtime *runtime;
1408 struct list_head *pos;
1409 int result = 0;
1410 int i, num_drecs;
1411 struct drain_rec *drec, drec_tmp, *d;
1412
1413 snd_assert(substream != NULL, return -ENXIO);
1414 card = substream->pcm->card;
1415 runtime = substream->runtime;
1416
1417 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1418 return -EBADFD;
1419
1420 snd_power_lock(card);
1421 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1422 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1423 if (result < 0) {
1424 snd_power_unlock(card);
1425 return result;
1426 }
1427 }
1428
1429 /* allocate temporary record for drain sync */
1430 down_read(&snd_pcm_link_rwsem);
1431 if (snd_pcm_stream_linked(substream)) {
1432 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1433 if (! drec) {
1434 up_read(&snd_pcm_link_rwsem);
1435 snd_power_unlock(card);
1436 return -ENOMEM;
1437 }
1438 } else
1439 drec = &drec_tmp;
1440
1441 /* count only playback streams */
1442 num_drecs = 0;
1443 snd_pcm_group_for_each(pos, substream) {
1444 struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos);
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 if (! num_drecs)
1461 goto _error;
1462
1463 snd_pcm_stream_lock_irq(substream);
1464 /* resume pause */
1465 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1466 snd_pcm_pause(substream, 0);
1467
1468 /* pre-start/stop - all running streams are changed to DRAINING state */
1469 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1470 if (result < 0) {
1471 snd_pcm_stream_unlock_irq(substream);
1472 goto _error;
1473 }
1474
1475 for (;;) {
1476 long tout;
1477 if (signal_pending(current)) {
1478 result = -ERESTARTSYS;
1479 break;
1480 }
1481 /* all finished? */
1482 for (i = 0; i < num_drecs; i++) {
1483 runtime = drec[i].substream->runtime;
1484 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1485 break;
1486 }
1487 if (i == num_drecs)
1488 break; /* yes, all drained */
1489
1490 set_current_state(TASK_INTERRUPTIBLE);
1491 snd_pcm_stream_unlock_irq(substream);
1492 snd_power_unlock(card);
1493 tout = schedule_timeout(10 * HZ);
1494 snd_power_lock(card);
1495 snd_pcm_stream_lock_irq(substream);
1496 if (tout == 0) {
1497 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1498 result = -ESTRPIPE;
1499 else {
1500 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1501 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1502 result = -EIO;
1503 }
1504 break;
1505 }
1506 }
1507
1508 snd_pcm_stream_unlock_irq(substream);
1509
1510 _error:
1511 for (i = 0; i < num_drecs; i++) {
1512 d = &drec[i];
1513 runtime = d->substream->runtime;
1514 remove_wait_queue(&runtime->sleep, &d->wait);
1515 runtime->stop_threshold = d->stop_threshold;
1516 }
1517
1518 if (drec != &drec_tmp)
1519 kfree(drec);
1520 snd_power_unlock(card);
1521
1522 return result;
1523 }
1524
1525 /*
1526 * drop ioctl
1527 *
1528 * Immediately put all linked substreams into SETUP state.
1529 */
1530 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1531 {
1532 struct snd_pcm_runtime *runtime;
1533 struct snd_card *card;
1534 int result = 0;
1535
1536 snd_assert(substream != NULL, return -ENXIO);
1537 runtime = substream->runtime;
1538 card = substream->pcm->card;
1539
1540 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1541 return -EBADFD;
1542
1543 snd_power_lock(card);
1544 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1545 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1546 if (result < 0)
1547 goto _unlock;
1548 }
1549
1550 snd_pcm_stream_lock_irq(substream);
1551 /* resume pause */
1552 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1553 snd_pcm_pause(substream, 0);
1554
1555 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1556 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1557 snd_pcm_stream_unlock_irq(substream);
1558 _unlock:
1559 snd_power_unlock(card);
1560 return result;
1561 }
1562
1563
1564 /* WARNING: Don't forget to fput back the file */
1565 static struct file *snd_pcm_file_fd(int fd)
1566 {
1567 struct file *file;
1568 struct inode *inode;
1569 unsigned int minor;
1570
1571 file = fget(fd);
1572 if (!file)
1573 return NULL;
1574 inode = file->f_dentry->d_inode;
1575 if (!S_ISCHR(inode->i_mode) ||
1576 imajor(inode) != snd_major) {
1577 fput(file);
1578 return NULL;
1579 }
1580 minor = iminor(inode);
1581 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1582 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1583 fput(file);
1584 return NULL;
1585 }
1586 return file;
1587 }
1588
1589 /*
1590 * PCM link handling
1591 */
1592 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1593 {
1594 int res = 0;
1595 struct file *file;
1596 struct snd_pcm_file *pcm_file;
1597 struct snd_pcm_substream *substream1;
1598
1599 file = snd_pcm_file_fd(fd);
1600 if (!file)
1601 return -EBADFD;
1602 pcm_file = file->private_data;
1603 substream1 = pcm_file->substream;
1604 down_write(&snd_pcm_link_rwsem);
1605 write_lock_irq(&snd_pcm_link_rwlock);
1606 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1607 substream->runtime->status->state != substream1->runtime->status->state) {
1608 res = -EBADFD;
1609 goto _end;
1610 }
1611 if (snd_pcm_stream_linked(substream1)) {
1612 res = -EALREADY;
1613 goto _end;
1614 }
1615 if (!snd_pcm_stream_linked(substream)) {
1616 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1617 if (substream->group == NULL) {
1618 res = -ENOMEM;
1619 goto _end;
1620 }
1621 spin_lock_init(&substream->group->lock);
1622 INIT_LIST_HEAD(&substream->group->substreams);
1623 list_add_tail(&substream->link_list, &substream->group->substreams);
1624 substream->group->count = 1;
1625 }
1626 list_add_tail(&substream1->link_list, &substream->group->substreams);
1627 substream->group->count++;
1628 substream1->group = substream->group;
1629 _end:
1630 write_unlock_irq(&snd_pcm_link_rwlock);
1631 up_write(&snd_pcm_link_rwsem);
1632 fput(file);
1633 return res;
1634 }
1635
1636 static void relink_to_local(struct snd_pcm_substream *substream)
1637 {
1638 substream->group = &substream->self_group;
1639 INIT_LIST_HEAD(&substream->self_group.substreams);
1640 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1641 }
1642
1643 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1644 {
1645 struct list_head *pos;
1646 int res = 0;
1647
1648 down_write(&snd_pcm_link_rwsem);
1649 write_lock_irq(&snd_pcm_link_rwlock);
1650 if (!snd_pcm_stream_linked(substream)) {
1651 res = -EALREADY;
1652 goto _end;
1653 }
1654 list_del(&substream->link_list);
1655 substream->group->count--;
1656 if (substream->group->count == 1) { /* detach the last stream, too */
1657 snd_pcm_group_for_each(pos, substream) {
1658 relink_to_local(snd_pcm_group_substream_entry(pos));
1659 break;
1660 }
1661 kfree(substream->group);
1662 }
1663 relink_to_local(substream);
1664 _end:
1665 write_unlock_irq(&snd_pcm_link_rwlock);
1666 up_write(&snd_pcm_link_rwsem);
1667 return res;
1668 }
1669
1670 /*
1671 * hw configurator
1672 */
1673 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1674 struct snd_pcm_hw_rule *rule)
1675 {
1676 struct snd_interval t;
1677 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1678 hw_param_interval_c(params, rule->deps[1]), &t);
1679 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1680 }
1681
1682 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1683 struct snd_pcm_hw_rule *rule)
1684 {
1685 struct snd_interval t;
1686 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1687 hw_param_interval_c(params, rule->deps[1]), &t);
1688 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1689 }
1690
1691 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1692 struct snd_pcm_hw_rule *rule)
1693 {
1694 struct snd_interval t;
1695 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1696 hw_param_interval_c(params, rule->deps[1]),
1697 (unsigned long) rule->private, &t);
1698 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1699 }
1700
1701 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1702 struct snd_pcm_hw_rule *rule)
1703 {
1704 struct snd_interval t;
1705 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1706 (unsigned long) rule->private,
1707 hw_param_interval_c(params, rule->deps[1]), &t);
1708 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1709 }
1710
1711 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1712 struct snd_pcm_hw_rule *rule)
1713 {
1714 unsigned int k;
1715 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1716 struct snd_mask m;
1717 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1718 snd_mask_any(&m);
1719 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1720 int bits;
1721 if (! snd_mask_test(mask, k))
1722 continue;
1723 bits = snd_pcm_format_physical_width(k);
1724 if (bits <= 0)
1725 continue; /* ignore invalid formats */
1726 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1727 snd_mask_reset(&m, k);
1728 }
1729 return snd_mask_refine(mask, &m);
1730 }
1731
1732 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1733 struct snd_pcm_hw_rule *rule)
1734 {
1735 struct snd_interval t;
1736 unsigned int k;
1737 t.min = UINT_MAX;
1738 t.max = 0;
1739 t.openmin = 0;
1740 t.openmax = 0;
1741 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1742 int bits;
1743 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1744 continue;
1745 bits = snd_pcm_format_physical_width(k);
1746 if (bits <= 0)
1747 continue; /* ignore invalid formats */
1748 if (t.min > (unsigned)bits)
1749 t.min = bits;
1750 if (t.max < (unsigned)bits)
1751 t.max = bits;
1752 }
1753 t.integer = 1;
1754 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1755 }
1756
1757 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1758 #error "Change this table"
1759 #endif
1760
1761 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1762 48000, 64000, 88200, 96000, 176400, 192000 };
1763
1764 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1765 struct snd_pcm_hw_rule *rule)
1766 {
1767 struct snd_pcm_hardware *hw = rule->private;
1768 return snd_interval_list(hw_param_interval(params, rule->var),
1769 ARRAY_SIZE(rates), rates, hw->rates);
1770 }
1771
1772 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1773 struct snd_pcm_hw_rule *rule)
1774 {
1775 struct snd_interval t;
1776 struct snd_pcm_substream *substream = rule->private;
1777 t.min = 0;
1778 t.max = substream->buffer_bytes_max;
1779 t.openmin = 0;
1780 t.openmax = 0;
1781 t.integer = 1;
1782 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1783 }
1784
1785 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1786 {
1787 struct snd_pcm_runtime *runtime = substream->runtime;
1788 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1789 int k, err;
1790
1791 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1792 snd_mask_any(constrs_mask(constrs, k));
1793 }
1794
1795 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1796 snd_interval_any(constrs_interval(constrs, k));
1797 }
1798
1799 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1800 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1801 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1802 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1803 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1804
1805 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1806 snd_pcm_hw_rule_format, NULL,
1807 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1808 if (err < 0)
1809 return err;
1810 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1811 snd_pcm_hw_rule_sample_bits, NULL,
1812 SNDRV_PCM_HW_PARAM_FORMAT,
1813 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1814 if (err < 0)
1815 return err;
1816 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1817 snd_pcm_hw_rule_div, NULL,
1818 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1819 if (err < 0)
1820 return err;
1821 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1822 snd_pcm_hw_rule_mul, NULL,
1823 SNDRV_PCM_HW_PARAM_SAMPLE_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_mulkdiv, (void*) 8,
1828 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -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_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1834 if (err < 0)
1835 return err;
1836 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1837 snd_pcm_hw_rule_div, NULL,
1838 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1839 if (err < 0)
1840 return err;
1841 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1842 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1843 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -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_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1849 if (err < 0)
1850 return err;
1851 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1852 snd_pcm_hw_rule_div, NULL,
1853 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1854 if (err < 0)
1855 return err;
1856 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1857 snd_pcm_hw_rule_div, NULL,
1858 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -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_mulkdiv, (void*) 8,
1863 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -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_muldivk, (void*) 1000000,
1868 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1869 if (err < 0)
1870 return err;
1871 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1872 snd_pcm_hw_rule_mul, NULL,
1873 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -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_mulkdiv, (void*) 8,
1878 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -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_muldivk, (void*) 1000000,
1883 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1884 if (err < 0)
1885 return err;
1886 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1887 snd_pcm_hw_rule_muldivk, (void*) 8,
1888 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1889 if (err < 0)
1890 return err;
1891 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1892 snd_pcm_hw_rule_muldivk, (void*) 8,
1893 SNDRV_PCM_HW_PARAM_BUFFER_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_PERIOD_TIME,
1897 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1898 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1899 if (err < 0)
1900 return err;
1901 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1902 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1903 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1904 if (err < 0)
1905 return err;
1906 return 0;
1907 }
1908
1909 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1910 {
1911 struct snd_pcm_runtime *runtime = substream->runtime;
1912 struct snd_pcm_hardware *hw = &runtime->hw;
1913 int err;
1914 unsigned int mask = 0;
1915
1916 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1917 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1918 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1919 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1920 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1921 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1922 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1923 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1924 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1925 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1926 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1927 }
1928 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1929 snd_assert(err >= 0, return -EINVAL);
1930
1931 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1932 snd_assert(err >= 0, return -EINVAL);
1933
1934 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1935 snd_assert(err >= 0, return -EINVAL);
1936
1937 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1938 hw->channels_min, hw->channels_max);
1939 snd_assert(err >= 0, return -EINVAL);
1940
1941 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1942 hw->rate_min, hw->rate_max);
1943 snd_assert(err >= 0, return -EINVAL);
1944
1945 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1946 hw->period_bytes_min, hw->period_bytes_max);
1947 snd_assert(err >= 0, return -EINVAL);
1948
1949 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1950 hw->periods_min, hw->periods_max);
1951 snd_assert(err >= 0, return -EINVAL);
1952
1953 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1954 hw->period_bytes_min, hw->buffer_bytes_max);
1955 snd_assert(err >= 0, return -EINVAL);
1956
1957 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1958 snd_pcm_hw_rule_buffer_bytes_max, substream,
1959 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1960 if (err < 0)
1961 return err;
1962
1963 /* FIXME: remove */
1964 if (runtime->dma_bytes) {
1965 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1966 snd_assert(err >= 0, return -EINVAL);
1967 }
1968
1969 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1970 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1971 snd_pcm_hw_rule_rate, hw,
1972 SNDRV_PCM_HW_PARAM_RATE, -1);
1973 if (err < 0)
1974 return err;
1975 }
1976
1977 /* FIXME: this belong to lowlevel */
1978 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1979 1000000 / HZ, 1000000 / HZ);
1980 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1981
1982 return 0;
1983 }
1984
1985 static void snd_pcm_add_file(struct snd_pcm_str *str,
1986 struct snd_pcm_file *pcm_file)
1987 {
1988 pcm_file->next = str->files;
1989 str->files = pcm_file;
1990 }
1991
1992 static void snd_pcm_remove_file(struct snd_pcm_str *str,
1993 struct snd_pcm_file *pcm_file)
1994 {
1995 struct snd_pcm_file * pcm_file1;
1996 if (str->files == pcm_file) {
1997 str->files = pcm_file->next;
1998 } else {
1999 pcm_file1 = str->files;
2000 while (pcm_file1 && pcm_file1->next != pcm_file)
2001 pcm_file1 = pcm_file1->next;
2002 if (pcm_file1 != NULL)
2003 pcm_file1->next = pcm_file->next;
2004 }
2005 }
2006
2007 static void pcm_release_private(struct snd_pcm_substream *substream)
2008 {
2009 struct snd_pcm_file *pcm_file = substream->file;
2010
2011 snd_pcm_unlink(substream);
2012 snd_pcm_remove_file(substream->pstr, pcm_file);
2013 kfree(pcm_file);
2014 }
2015
2016 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2017 {
2018 snd_pcm_drop(substream);
2019 if (substream->hw_opened) {
2020 if (substream->ops->hw_free != NULL)
2021 substream->ops->hw_free(substream);
2022 substream->ops->close(substream);
2023 substream->hw_opened = 0;
2024 }
2025 if (substream->pcm_release) {
2026 substream->pcm_release(substream);
2027 substream->pcm_release = NULL;
2028 }
2029 snd_pcm_detach_substream(substream);
2030 }
2031
2032 EXPORT_SYMBOL(snd_pcm_release_substream);
2033
2034 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2035 struct file *file,
2036 struct snd_pcm_substream **rsubstream)
2037 {
2038 struct snd_pcm_substream *substream;
2039 int err;
2040
2041 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2042 if (err < 0)
2043 return err;
2044 substream->no_mmap_ctrl = 0;
2045 err = snd_pcm_hw_constraints_init(substream);
2046 if (err < 0) {
2047 snd_printd("snd_pcm_hw_constraints_init failed\n");
2048 goto error;
2049 }
2050
2051 if ((err = substream->ops->open(substream)) < 0)
2052 goto error;
2053
2054 substream->hw_opened = 1;
2055
2056 err = snd_pcm_hw_constraints_complete(substream);
2057 if (err < 0) {
2058 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2059 goto error;
2060 }
2061
2062 *rsubstream = substream;
2063 return 0;
2064
2065 error:
2066 snd_pcm_release_substream(substream);
2067 return err;
2068 }
2069
2070 EXPORT_SYMBOL(snd_pcm_open_substream);
2071
2072 static int snd_pcm_open_file(struct file *file,
2073 struct snd_pcm *pcm,
2074 int stream,
2075 struct snd_pcm_file **rpcm_file)
2076 {
2077 struct snd_pcm_file *pcm_file;
2078 struct snd_pcm_substream *substream;
2079 struct snd_pcm_str *str;
2080 int err;
2081
2082 snd_assert(rpcm_file != NULL, return -EINVAL);
2083 *rpcm_file = NULL;
2084
2085 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2086 if (err < 0)
2087 return err;
2088
2089 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2090 if (pcm_file == NULL) {
2091 snd_pcm_release_substream(substream);
2092 return -ENOMEM;
2093 }
2094 str = substream->pstr;
2095 substream->file = pcm_file;
2096 substream->pcm_release = pcm_release_private;
2097 pcm_file->substream = substream;
2098 snd_pcm_add_file(str, pcm_file);
2099
2100 file->private_data = pcm_file;
2101 *rpcm_file = pcm_file;
2102 return 0;
2103 }
2104
2105 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2106 {
2107 struct snd_pcm *pcm;
2108
2109 pcm = snd_lookup_minor_data(iminor(inode),
2110 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2111 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2112 }
2113
2114 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2115 {
2116 struct snd_pcm *pcm;
2117
2118 pcm = snd_lookup_minor_data(iminor(inode),
2119 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2120 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2121 }
2122
2123 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2124 {
2125 int err;
2126 struct snd_pcm_file *pcm_file;
2127 wait_queue_t wait;
2128
2129 if (pcm == NULL) {
2130 err = -ENODEV;
2131 goto __error1;
2132 }
2133 err = snd_card_file_add(pcm->card, file);
2134 if (err < 0)
2135 goto __error1;
2136 if (!try_module_get(pcm->card->module)) {
2137 err = -EFAULT;
2138 goto __error2;
2139 }
2140 init_waitqueue_entry(&wait, current);
2141 add_wait_queue(&pcm->open_wait, &wait);
2142 mutex_lock(&pcm->open_mutex);
2143 while (1) {
2144 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2145 if (err >= 0)
2146 break;
2147 if (err == -EAGAIN) {
2148 if (file->f_flags & O_NONBLOCK) {
2149 err = -EBUSY;
2150 break;
2151 }
2152 } else
2153 break;
2154 set_current_state(TASK_INTERRUPTIBLE);
2155 mutex_unlock(&pcm->open_mutex);
2156 schedule();
2157 mutex_lock(&pcm->open_mutex);
2158 if (signal_pending(current)) {
2159 err = -ERESTARTSYS;
2160 break;
2161 }
2162 }
2163 remove_wait_queue(&pcm->open_wait, &wait);
2164 mutex_unlock(&pcm->open_mutex);
2165 if (err < 0)
2166 goto __error;
2167 return err;
2168
2169 __error:
2170 module_put(pcm->card->module);
2171 __error2:
2172 snd_card_file_remove(pcm->card, file);
2173 __error1:
2174 return err;
2175 }
2176
2177 static int snd_pcm_release(struct inode *inode, struct file *file)
2178 {
2179 struct snd_pcm *pcm;
2180 struct snd_pcm_substream *substream;
2181 struct snd_pcm_file *pcm_file;
2182
2183 pcm_file = file->private_data;
2184 substream = pcm_file->substream;
2185 snd_assert(substream != NULL, return -ENXIO);
2186 snd_assert(!atomic_read(&substream->runtime->mmap_count), );
2187 pcm = substream->pcm;
2188 fasync_helper(-1, file, 0, &substream->runtime->fasync);
2189 mutex_lock(&pcm->open_mutex);
2190 snd_pcm_release_substream(substream);
2191 mutex_unlock(&pcm->open_mutex);
2192 wake_up(&pcm->open_wait);
2193 module_put(pcm->card->module);
2194 snd_card_file_remove(pcm->card, file);
2195 return 0;
2196 }
2197
2198 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2199 snd_pcm_uframes_t frames)
2200 {
2201 struct snd_pcm_runtime *runtime = substream->runtime;
2202 snd_pcm_sframes_t appl_ptr;
2203 snd_pcm_sframes_t ret;
2204 snd_pcm_sframes_t hw_avail;
2205
2206 if (frames == 0)
2207 return 0;
2208
2209 snd_pcm_stream_lock_irq(substream);
2210 switch (runtime->status->state) {
2211 case SNDRV_PCM_STATE_PREPARED:
2212 break;
2213 case SNDRV_PCM_STATE_DRAINING:
2214 case SNDRV_PCM_STATE_RUNNING:
2215 if (snd_pcm_update_hw_ptr(substream) >= 0)
2216 break;
2217 /* Fall through */
2218 case SNDRV_PCM_STATE_XRUN:
2219 ret = -EPIPE;
2220 goto __end;
2221 default:
2222 ret = -EBADFD;
2223 goto __end;
2224 }
2225
2226 hw_avail = snd_pcm_playback_hw_avail(runtime);
2227 if (hw_avail <= 0) {
2228 ret = 0;
2229 goto __end;
2230 }
2231 if (frames > (snd_pcm_uframes_t)hw_avail)
2232 frames = hw_avail;
2233 else
2234 frames -= frames % runtime->xfer_align;
2235 appl_ptr = runtime->control->appl_ptr - frames;
2236 if (appl_ptr < 0)
2237 appl_ptr += runtime->boundary;
2238 runtime->control->appl_ptr = appl_ptr;
2239 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2240 runtime->sleep_min)
2241 snd_pcm_tick_prepare(substream);
2242 ret = frames;
2243 __end:
2244 snd_pcm_stream_unlock_irq(substream);
2245 return ret;
2246 }
2247
2248 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2249 snd_pcm_uframes_t frames)
2250 {
2251 struct snd_pcm_runtime *runtime = substream->runtime;
2252 snd_pcm_sframes_t appl_ptr;
2253 snd_pcm_sframes_t ret;
2254 snd_pcm_sframes_t hw_avail;
2255
2256 if (frames == 0)
2257 return 0;
2258
2259 snd_pcm_stream_lock_irq(substream);
2260 switch (runtime->status->state) {
2261 case SNDRV_PCM_STATE_PREPARED:
2262 case SNDRV_PCM_STATE_DRAINING:
2263 break;
2264 case SNDRV_PCM_STATE_RUNNING:
2265 if (snd_pcm_update_hw_ptr(substream) >= 0)
2266 break;
2267 /* Fall through */
2268 case SNDRV_PCM_STATE_XRUN:
2269 ret = -EPIPE;
2270 goto __end;
2271 default:
2272 ret = -EBADFD;
2273 goto __end;
2274 }
2275
2276 hw_avail = snd_pcm_capture_hw_avail(runtime);
2277 if (hw_avail <= 0) {
2278 ret = 0;
2279 goto __end;
2280 }
2281 if (frames > (snd_pcm_uframes_t)hw_avail)
2282 frames = hw_avail;
2283 else
2284 frames -= frames % runtime->xfer_align;
2285 appl_ptr = runtime->control->appl_ptr - frames;
2286 if (appl_ptr < 0)
2287 appl_ptr += runtime->boundary;
2288 runtime->control->appl_ptr = appl_ptr;
2289 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2290 runtime->sleep_min)
2291 snd_pcm_tick_prepare(substream);
2292 ret = frames;
2293 __end:
2294 snd_pcm_stream_unlock_irq(substream);
2295 return ret;
2296 }
2297
2298 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2299 snd_pcm_uframes_t frames)
2300 {
2301 struct snd_pcm_runtime *runtime = substream->runtime;
2302 snd_pcm_sframes_t appl_ptr;
2303 snd_pcm_sframes_t ret;
2304 snd_pcm_sframes_t avail;
2305
2306 if (frames == 0)
2307 return 0;
2308
2309 snd_pcm_stream_lock_irq(substream);
2310 switch (runtime->status->state) {
2311 case SNDRV_PCM_STATE_PREPARED:
2312 case SNDRV_PCM_STATE_PAUSED:
2313 break;
2314 case SNDRV_PCM_STATE_DRAINING:
2315 case SNDRV_PCM_STATE_RUNNING:
2316 if (snd_pcm_update_hw_ptr(substream) >= 0)
2317 break;
2318 /* Fall through */
2319 case SNDRV_PCM_STATE_XRUN:
2320 ret = -EPIPE;
2321 goto __end;
2322 default:
2323 ret = -EBADFD;
2324 goto __end;
2325 }
2326
2327 avail = snd_pcm_playback_avail(runtime);
2328 if (avail <= 0) {
2329 ret = 0;
2330 goto __end;
2331 }
2332 if (frames > (snd_pcm_uframes_t)avail)
2333 frames = avail;
2334 else
2335 frames -= frames % runtime->xfer_align;
2336 appl_ptr = runtime->control->appl_ptr + frames;
2337 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2338 appl_ptr -= runtime->boundary;
2339 runtime->control->appl_ptr = appl_ptr;
2340 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2341 runtime->sleep_min)
2342 snd_pcm_tick_prepare(substream);
2343 ret = frames;
2344 __end:
2345 snd_pcm_stream_unlock_irq(substream);
2346 return ret;
2347 }
2348
2349 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2350 snd_pcm_uframes_t frames)
2351 {
2352 struct snd_pcm_runtime *runtime = substream->runtime;
2353 snd_pcm_sframes_t appl_ptr;
2354 snd_pcm_sframes_t ret;
2355 snd_pcm_sframes_t avail;
2356
2357 if (frames == 0)
2358 return 0;
2359
2360 snd_pcm_stream_lock_irq(substream);
2361 switch (runtime->status->state) {
2362 case SNDRV_PCM_STATE_PREPARED:
2363 case SNDRV_PCM_STATE_DRAINING:
2364 case SNDRV_PCM_STATE_PAUSED:
2365 break;
2366 case SNDRV_PCM_STATE_RUNNING:
2367 if (snd_pcm_update_hw_ptr(substream) >= 0)
2368 break;
2369 /* Fall through */
2370 case SNDRV_PCM_STATE_XRUN:
2371 ret = -EPIPE;
2372 goto __end;
2373 default:
2374 ret = -EBADFD;
2375 goto __end;
2376 }
2377
2378 avail = snd_pcm_capture_avail(runtime);
2379 if (avail <= 0) {
2380 ret = 0;
2381 goto __end;
2382 }
2383 if (frames > (snd_pcm_uframes_t)avail)
2384 frames = avail;
2385 else
2386 frames -= frames % runtime->xfer_align;
2387 appl_ptr = runtime->control->appl_ptr + frames;
2388 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2389 appl_ptr -= runtime->boundary;
2390 runtime->control->appl_ptr = appl_ptr;
2391 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2392 runtime->sleep_min)
2393 snd_pcm_tick_prepare(substream);
2394 ret = frames;
2395 __end:
2396 snd_pcm_stream_unlock_irq(substream);
2397 return ret;
2398 }
2399
2400 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2401 {
2402 struct snd_pcm_runtime *runtime = substream->runtime;
2403 int err;
2404
2405 snd_pcm_stream_lock_irq(substream);
2406 switch (runtime->status->state) {
2407 case SNDRV_PCM_STATE_DRAINING:
2408 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2409 goto __badfd;
2410 case SNDRV_PCM_STATE_RUNNING:
2411 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2412 break;
2413 /* Fall through */
2414 case SNDRV_PCM_STATE_PREPARED:
2415 case SNDRV_PCM_STATE_SUSPENDED:
2416 err = 0;
2417 break;
2418 case SNDRV_PCM_STATE_XRUN:
2419 err = -EPIPE;
2420 break;
2421 default:
2422 __badfd:
2423 err = -EBADFD;
2424 break;
2425 }
2426 snd_pcm_stream_unlock_irq(substream);
2427 return err;
2428 }
2429
2430 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2431 snd_pcm_sframes_t __user *res)
2432 {
2433 struct snd_pcm_runtime *runtime = substream->runtime;
2434 int err;
2435 snd_pcm_sframes_t n = 0;
2436
2437 snd_pcm_stream_lock_irq(substream);
2438 switch (runtime->status->state) {
2439 case SNDRV_PCM_STATE_DRAINING:
2440 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2441 goto __badfd;
2442 case SNDRV_PCM_STATE_RUNNING:
2443 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2444 break;
2445 /* Fall through */
2446 case SNDRV_PCM_STATE_PREPARED:
2447 case SNDRV_PCM_STATE_SUSPENDED:
2448 err = 0;
2449 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2450 n = snd_pcm_playback_hw_avail(runtime);
2451 else
2452 n = snd_pcm_capture_avail(runtime);
2453 break;
2454 case SNDRV_PCM_STATE_XRUN:
2455 err = -EPIPE;
2456 break;
2457 default:
2458 __badfd:
2459 err = -EBADFD;
2460 break;
2461 }
2462 snd_pcm_stream_unlock_irq(substream);
2463 if (!err)
2464 if (put_user(n, res))
2465 err = -EFAULT;
2466 return err;
2467 }
2468
2469 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2470 struct snd_pcm_sync_ptr __user *_sync_ptr)
2471 {
2472 struct snd_pcm_runtime *runtime = substream->runtime;
2473 struct snd_pcm_sync_ptr sync_ptr;
2474 volatile struct snd_pcm_mmap_status *status;
2475 volatile struct snd_pcm_mmap_control *control;
2476 int err;
2477
2478 memset(&sync_ptr, 0, sizeof(sync_ptr));
2479 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2480 return -EFAULT;
2481 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2482 return -EFAULT;
2483 status = runtime->status;
2484 control = runtime->control;
2485 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2486 err = snd_pcm_hwsync(substream);
2487 if (err < 0)
2488 return err;
2489 }
2490 snd_pcm_stream_lock_irq(substream);
2491 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2492 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2493 else
2494 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2495 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2496 control->avail_min = sync_ptr.c.control.avail_min;
2497 else
2498 sync_ptr.c.control.avail_min = control->avail_min;
2499 sync_ptr.s.status.state = status->state;
2500 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2501 sync_ptr.s.status.tstamp = status->tstamp;
2502 sync_ptr.s.status.suspended_state = status->suspended_state;
2503 snd_pcm_stream_unlock_irq(substream);
2504 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2505 return -EFAULT;
2506 return 0;
2507 }
2508
2509 static int snd_pcm_common_ioctl1(struct snd_pcm_substream *substream,
2510 unsigned int cmd, void __user *arg)
2511 {
2512 snd_assert(substream != NULL, return -ENXIO);
2513
2514 switch (cmd) {
2515 case SNDRV_PCM_IOCTL_PVERSION:
2516 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2517 case SNDRV_PCM_IOCTL_INFO:
2518 return snd_pcm_info_user(substream, arg);
2519 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2520 return 0;
2521 case SNDRV_PCM_IOCTL_HW_REFINE:
2522 return snd_pcm_hw_refine_user(substream, arg);
2523 case SNDRV_PCM_IOCTL_HW_PARAMS:
2524 return snd_pcm_hw_params_user(substream, arg);
2525 case SNDRV_PCM_IOCTL_HW_FREE:
2526 return snd_pcm_hw_free(substream);
2527 case SNDRV_PCM_IOCTL_SW_PARAMS:
2528 return snd_pcm_sw_params_user(substream, arg);
2529 case SNDRV_PCM_IOCTL_STATUS:
2530 return snd_pcm_status_user(substream, arg);
2531 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2532 return snd_pcm_channel_info_user(substream, arg);
2533 case SNDRV_PCM_IOCTL_PREPARE:
2534 return snd_pcm_prepare(substream);
2535 case SNDRV_PCM_IOCTL_RESET:
2536 return snd_pcm_reset(substream);
2537 case SNDRV_PCM_IOCTL_START:
2538 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2539 case SNDRV_PCM_IOCTL_LINK:
2540 return snd_pcm_link(substream, (int)(unsigned long) arg);
2541 case SNDRV_PCM_IOCTL_UNLINK:
2542 return snd_pcm_unlink(substream);
2543 case SNDRV_PCM_IOCTL_RESUME:
2544 return snd_pcm_resume(substream);
2545 case SNDRV_PCM_IOCTL_XRUN:
2546 return snd_pcm_xrun(substream);
2547 case SNDRV_PCM_IOCTL_HWSYNC:
2548 return snd_pcm_hwsync(substream);
2549 case SNDRV_PCM_IOCTL_DELAY:
2550 return snd_pcm_delay(substream, arg);
2551 case SNDRV_PCM_IOCTL_SYNC_PTR:
2552 return snd_pcm_sync_ptr(substream, arg);
2553 #ifdef CONFIG_SND_SUPPORT_OLD_API
2554 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2555 return snd_pcm_hw_refine_old_user(substream, arg);
2556 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2557 return snd_pcm_hw_params_old_user(substream, arg);
2558 #endif
2559 case SNDRV_PCM_IOCTL_DRAIN:
2560 return snd_pcm_drain(substream);
2561 case SNDRV_PCM_IOCTL_DROP:
2562 return snd_pcm_drop(substream);
2563 case SNDRV_PCM_IOCTL_PAUSE:
2564 {
2565 int res;
2566 snd_pcm_stream_lock_irq(substream);
2567 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2568 snd_pcm_stream_unlock_irq(substream);
2569 return res;
2570 }
2571 }
2572 snd_printd("unknown ioctl = 0x%x\n", cmd);
2573 return -ENOTTY;
2574 }
2575
2576 static int snd_pcm_playback_ioctl1(struct snd_pcm_substream *substream,
2577 unsigned int cmd, void __user *arg)
2578 {
2579 snd_assert(substream != NULL, return -ENXIO);
2580 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2581 switch (cmd) {
2582 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2583 {
2584 struct snd_xferi xferi;
2585 struct snd_xferi __user *_xferi = arg;
2586 struct snd_pcm_runtime *runtime = substream->runtime;
2587 snd_pcm_sframes_t result;
2588 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2589 return -EBADFD;
2590 if (put_user(0, &_xferi->result))
2591 return -EFAULT;
2592 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2593 return -EFAULT;
2594 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2595 __put_user(result, &_xferi->result);
2596 return result < 0 ? result : 0;
2597 }
2598 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2599 {
2600 struct snd_xfern xfern;
2601 struct snd_xfern __user *_xfern = arg;
2602 struct snd_pcm_runtime *runtime = substream->runtime;
2603 void __user **bufs;
2604 snd_pcm_sframes_t result;
2605 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2606 return -EBADFD;
2607 if (runtime->channels > 128)
2608 return -EINVAL;
2609 if (put_user(0, &_xfern->result))
2610 return -EFAULT;
2611 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2612 return -EFAULT;
2613 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2614 if (bufs == NULL)
2615 return -ENOMEM;
2616 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2617 kfree(bufs);
2618 return -EFAULT;
2619 }
2620 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2621 kfree(bufs);
2622 __put_user(result, &_xfern->result);
2623 return result < 0 ? result : 0;
2624 }
2625 case SNDRV_PCM_IOCTL_REWIND:
2626 {
2627 snd_pcm_uframes_t frames;
2628 snd_pcm_uframes_t __user *_frames = arg;
2629 snd_pcm_sframes_t result;
2630 if (get_user(frames, _frames))
2631 return -EFAULT;
2632 if (put_user(0, _frames))
2633 return -EFAULT;
2634 result = snd_pcm_playback_rewind(substream, frames);
2635 __put_user(result, _frames);
2636 return result < 0 ? result : 0;
2637 }
2638 case SNDRV_PCM_IOCTL_FORWARD:
2639 {
2640 snd_pcm_uframes_t frames;
2641 snd_pcm_uframes_t __user *_frames = arg;
2642 snd_pcm_sframes_t result;
2643 if (get_user(frames, _frames))
2644 return -EFAULT;
2645 if (put_user(0, _frames))
2646 return -EFAULT;
2647 result = snd_pcm_playback_forward(substream, frames);
2648 __put_user(result, _frames);
2649 return result < 0 ? result : 0;
2650 }
2651 }
2652 return snd_pcm_common_ioctl1(substream, cmd, arg);
2653 }
2654
2655 static int snd_pcm_capture_ioctl1(struct snd_pcm_substream *substream,
2656 unsigned int cmd, void __user *arg)
2657 {
2658 snd_assert(substream != NULL, return -ENXIO);
2659 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2660 switch (cmd) {
2661 case SNDRV_PCM_IOCTL_READI_FRAMES:
2662 {
2663 struct snd_xferi xferi;
2664 struct snd_xferi __user *_xferi = arg;
2665 struct snd_pcm_runtime *runtime = substream->runtime;
2666 snd_pcm_sframes_t result;
2667 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2668 return -EBADFD;
2669 if (put_user(0, &_xferi->result))
2670 return -EFAULT;
2671 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2672 return -EFAULT;
2673 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2674 __put_user(result, &_xferi->result);
2675 return result < 0 ? result : 0;
2676 }
2677 case SNDRV_PCM_IOCTL_READN_FRAMES:
2678 {
2679 struct snd_xfern xfern;
2680 struct snd_xfern __user *_xfern = arg;
2681 struct snd_pcm_runtime *runtime = substream->runtime;
2682 void *bufs;
2683 snd_pcm_sframes_t result;
2684 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2685 return -EBADFD;
2686 if (runtime->channels > 128)
2687 return -EINVAL;
2688 if (put_user(0, &_xfern->result))
2689 return -EFAULT;
2690 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2691 return -EFAULT;
2692 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2693 if (bufs == NULL)
2694 return -ENOMEM;
2695 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2696 kfree(bufs);
2697 return -EFAULT;
2698 }
2699 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2700 kfree(bufs);
2701 __put_user(result, &_xfern->result);
2702 return result < 0 ? result : 0;
2703 }
2704 case SNDRV_PCM_IOCTL_REWIND:
2705 {
2706 snd_pcm_uframes_t frames;
2707 snd_pcm_uframes_t __user *_frames = arg;
2708 snd_pcm_sframes_t result;
2709 if (get_user(frames, _frames))
2710 return -EFAULT;
2711 if (put_user(0, _frames))
2712 return -EFAULT;
2713 result = snd_pcm_capture_rewind(substream, frames);
2714 __put_user(result, _frames);
2715 return result < 0 ? result : 0;
2716 }
2717 case SNDRV_PCM_IOCTL_FORWARD:
2718 {
2719 snd_pcm_uframes_t frames;
2720 snd_pcm_uframes_t __user *_frames = arg;
2721 snd_pcm_sframes_t result;
2722 if (get_user(frames, _frames))
2723 return -EFAULT;
2724 if (put_user(0, _frames))
2725 return -EFAULT;
2726 result = snd_pcm_capture_forward(substream, frames);
2727 __put_user(result, _frames);
2728 return result < 0 ? result : 0;
2729 }
2730 }
2731 return snd_pcm_common_ioctl1(substream, cmd, arg);
2732 }
2733
2734 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2735 unsigned long arg)
2736 {
2737 struct snd_pcm_file *pcm_file;
2738
2739 pcm_file = file->private_data;
2740
2741 if (((cmd >> 8) & 0xff) != 'A')
2742 return -ENOTTY;
2743
2744 return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2745 }
2746
2747 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2748 unsigned long arg)
2749 {
2750 struct snd_pcm_file *pcm_file;
2751
2752 pcm_file = file->private_data;
2753
2754 if (((cmd >> 8) & 0xff) != 'A')
2755 return -ENOTTY;
2756
2757 return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2758 }
2759
2760 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2761 unsigned int cmd, void *arg)
2762 {
2763 mm_segment_t fs;
2764 int result;
2765
2766 fs = snd_enter_user();
2767 switch (substream->stream) {
2768 case SNDRV_PCM_STREAM_PLAYBACK:
2769 result = snd_pcm_playback_ioctl1(substream,
2770 cmd, (void __user *)arg);
2771 break;
2772 case SNDRV_PCM_STREAM_CAPTURE:
2773 result = snd_pcm_capture_ioctl1(substream,
2774 cmd, (void __user *)arg);
2775 break;
2776 default:
2777 result = -EINVAL;
2778 break;
2779 }
2780 snd_leave_user(fs);
2781 return result;
2782 }
2783
2784 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2785
2786 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2787 loff_t * offset)
2788 {
2789 struct snd_pcm_file *pcm_file;
2790 struct snd_pcm_substream *substream;
2791 struct snd_pcm_runtime *runtime;
2792 snd_pcm_sframes_t result;
2793
2794 pcm_file = file->private_data;
2795 substream = pcm_file->substream;
2796 snd_assert(substream != NULL, return -ENXIO);
2797 runtime = substream->runtime;
2798 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2799 return -EBADFD;
2800 if (!frame_aligned(runtime, count))
2801 return -EINVAL;
2802 count = bytes_to_frames(runtime, count);
2803 result = snd_pcm_lib_read(substream, buf, count);
2804 if (result > 0)
2805 result = frames_to_bytes(runtime, result);
2806 return result;
2807 }
2808
2809 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2810 size_t count, loff_t * offset)
2811 {
2812 struct snd_pcm_file *pcm_file;
2813 struct snd_pcm_substream *substream;
2814 struct snd_pcm_runtime *runtime;
2815 snd_pcm_sframes_t result;
2816
2817 pcm_file = file->private_data;
2818 substream = pcm_file->substream;
2819 snd_assert(substream != NULL, result = -ENXIO; goto end);
2820 runtime = substream->runtime;
2821 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2822 result = -EBADFD;
2823 goto end;
2824 }
2825 if (!frame_aligned(runtime, count)) {
2826 result = -EINVAL;
2827 goto end;
2828 }
2829 count = bytes_to_frames(runtime, count);
2830 result = snd_pcm_lib_write(substream, buf, count);
2831 if (result > 0)
2832 result = frames_to_bytes(runtime, result);
2833 end:
2834 return result;
2835 }
2836
2837 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2838 unsigned long count, loff_t * offset)
2839
2840 {
2841 struct snd_pcm_file *pcm_file;
2842 struct snd_pcm_substream *substream;
2843 struct snd_pcm_runtime *runtime;
2844 snd_pcm_sframes_t result;
2845 unsigned long i;
2846 void __user **bufs;
2847 snd_pcm_uframes_t frames;
2848
2849 pcm_file = file->private_data;
2850 substream = pcm_file->substream;
2851 snd_assert(substream != NULL, return -ENXIO);
2852 runtime = substream->runtime;
2853 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2854 return -EBADFD;
2855 if (count > 1024 || count != runtime->channels)
2856 return -EINVAL;
2857 if (!frame_aligned(runtime, _vector->iov_len))
2858 return -EINVAL;
2859 frames = bytes_to_samples(runtime, _vector->iov_len);
2860 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2861 if (bufs == NULL)
2862 return -ENOMEM;
2863 for (i = 0; i < count; ++i)
2864 bufs[i] = _vector[i].iov_base;
2865 result = snd_pcm_lib_readv(substream, bufs, frames);
2866 if (result > 0)
2867 result = frames_to_bytes(runtime, result);
2868 kfree(bufs);
2869 return result;
2870 }
2871
2872 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2873 unsigned long count, loff_t * offset)
2874 {
2875 struct snd_pcm_file *pcm_file;
2876 struct snd_pcm_substream *substream;
2877 struct snd_pcm_runtime *runtime;
2878 snd_pcm_sframes_t result;
2879 unsigned long i;
2880 void __user **bufs;
2881 snd_pcm_uframes_t frames;
2882
2883 pcm_file = file->private_data;
2884 substream = pcm_file->substream;
2885 snd_assert(substream != NULL, result = -ENXIO; goto end);
2886 runtime = substream->runtime;
2887 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2888 result = -EBADFD;
2889 goto end;
2890 }
2891 if (count > 128 || count != runtime->channels ||
2892 !frame_aligned(runtime, _vector->iov_len)) {
2893 result = -EINVAL;
2894 goto end;
2895 }
2896 frames = bytes_to_samples(runtime, _vector->iov_len);
2897 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2898 if (bufs == NULL)
2899 return -ENOMEM;
2900 for (i = 0; i < count; ++i)
2901 bufs[i] = _vector[i].iov_base;
2902 result = snd_pcm_lib_writev(substream, bufs, frames);
2903 if (result > 0)
2904 result = frames_to_bytes(runtime, result);
2905 kfree(bufs);
2906 end:
2907 return result;
2908 }
2909
2910 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2911 {
2912 struct snd_pcm_file *pcm_file;
2913 struct snd_pcm_substream *substream;
2914 struct snd_pcm_runtime *runtime;
2915 unsigned int mask;
2916 snd_pcm_uframes_t avail;
2917
2918 pcm_file = file->private_data;
2919
2920 substream = pcm_file->substream;
2921 snd_assert(substream != NULL, return -ENXIO);
2922 runtime = substream->runtime;
2923
2924 poll_wait(file, &runtime->sleep, wait);
2925
2926 snd_pcm_stream_lock_irq(substream);
2927 avail = snd_pcm_playback_avail(runtime);
2928 switch (runtime->status->state) {
2929 case SNDRV_PCM_STATE_RUNNING:
2930 case SNDRV_PCM_STATE_PREPARED:
2931 case SNDRV_PCM_STATE_PAUSED:
2932 if (avail >= runtime->control->avail_min) {
2933 mask = POLLOUT | POLLWRNORM;
2934 break;
2935 }
2936 /* Fall through */
2937 case SNDRV_PCM_STATE_DRAINING:
2938 mask = 0;
2939 break;
2940 default:
2941 mask = POLLOUT | POLLWRNORM | POLLERR;
2942 break;
2943 }
2944 snd_pcm_stream_unlock_irq(substream);
2945 return mask;
2946 }
2947
2948 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2949 {
2950 struct snd_pcm_file *pcm_file;
2951 struct snd_pcm_substream *substream;
2952 struct snd_pcm_runtime *runtime;
2953 unsigned int mask;
2954 snd_pcm_uframes_t avail;
2955
2956 pcm_file = file->private_data;
2957
2958 substream = pcm_file->substream;
2959 snd_assert(substream != NULL, return -ENXIO);
2960 runtime = substream->runtime;
2961
2962 poll_wait(file, &runtime->sleep, wait);
2963
2964 snd_pcm_stream_lock_irq(substream);
2965 avail = snd_pcm_capture_avail(runtime);
2966 switch (runtime->status->state) {
2967 case SNDRV_PCM_STATE_RUNNING:
2968 case SNDRV_PCM_STATE_PREPARED:
2969 case SNDRV_PCM_STATE_PAUSED:
2970 if (avail >= runtime->control->avail_min) {
2971 mask = POLLIN | POLLRDNORM;
2972 break;
2973 }
2974 mask = 0;
2975 break;
2976 case SNDRV_PCM_STATE_DRAINING:
2977 if (avail > 0) {
2978 mask = POLLIN | POLLRDNORM;
2979 break;
2980 }
2981 /* Fall through */
2982 default:
2983 mask = POLLIN | POLLRDNORM | POLLERR;
2984 break;
2985 }
2986 snd_pcm_stream_unlock_irq(substream);
2987 return mask;
2988 }
2989
2990 /*
2991 * mmap support
2992 */
2993
2994 /*
2995 * Only on coherent architectures, we can mmap the status and the control records
2996 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2997 */
2998 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2999 /*
3000 * mmap status record
3001 */
3002 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area,
3003 unsigned long address, int *type)
3004 {
3005 struct snd_pcm_substream *substream = area->vm_private_data;
3006 struct snd_pcm_runtime *runtime;
3007 struct page * page;
3008
3009 if (substream == NULL)
3010 return NOPAGE_OOM;
3011 runtime = substream->runtime;
3012 page = virt_to_page(runtime->status);
3013 get_page(page);
3014 if (type)
3015 *type = VM_FAULT_MINOR;
3016 return page;
3017 }
3018
3019 static struct vm_operations_struct snd_pcm_vm_ops_status =
3020 {
3021 .nopage = snd_pcm_mmap_status_nopage,
3022 };
3023
3024 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3025 struct vm_area_struct *area)
3026 {
3027 struct snd_pcm_runtime *runtime;
3028 long size;
3029 if (!(area->vm_flags & VM_READ))
3030 return -EINVAL;
3031 runtime = substream->runtime;
3032 snd_assert(runtime != NULL, return -EAGAIN);
3033 size = area->vm_end - area->vm_start;
3034 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3035 return -EINVAL;
3036 area->vm_ops = &snd_pcm_vm_ops_status;
3037 area->vm_private_data = substream;
3038 area->vm_flags |= VM_RESERVED;
3039 return 0;
3040 }
3041
3042 /*
3043 * mmap control record
3044 */
3045 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area,
3046 unsigned long address, int *type)
3047 {
3048 struct snd_pcm_substream *substream = area->vm_private_data;
3049 struct snd_pcm_runtime *runtime;
3050 struct page * page;
3051
3052 if (substream == NULL)
3053 return NOPAGE_OOM;
3054 runtime = substream->runtime;
3055 page = virt_to_page(runtime->control);
3056 get_page(page);
3057 if (type)
3058 *type = VM_FAULT_MINOR;
3059 return page;
3060 }
3061
3062 static struct vm_operations_struct snd_pcm_vm_ops_control =
3063 {
3064 .nopage = snd_pcm_mmap_control_nopage,
3065 };
3066
3067 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3068 struct vm_area_struct *area)
3069 {
3070 struct snd_pcm_runtime *runtime;
3071 long size;
3072 if (!(area->vm_flags & VM_READ))
3073 return -EINVAL;
3074 runtime = substream->runtime;
3075 snd_assert(runtime != NULL, return -EAGAIN);
3076 size = area->vm_end - area->vm_start;
3077 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3078 return -EINVAL;
3079 area->vm_ops = &snd_pcm_vm_ops_control;
3080 area->vm_private_data = substream;
3081 area->vm_flags |= VM_RESERVED;
3082 return 0;
3083 }
3084 #else /* ! coherent mmap */
3085 /*
3086 * don't support mmap for status and control records.
3087 */
3088 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3089 struct vm_area_struct *area)
3090 {
3091 return -ENXIO;
3092 }
3093 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3094 struct vm_area_struct *area)
3095 {
3096 return -ENXIO;
3097 }
3098 #endif /* coherent mmap */
3099
3100 /*
3101 * nopage callback for mmapping a RAM page
3102 */
3103 static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area,
3104 unsigned long address, int *type)
3105 {
3106 struct snd_pcm_substream *substream = area->vm_private_data;
3107 struct snd_pcm_runtime *runtime;
3108 unsigned long offset;
3109 struct page * page;
3110 void *vaddr;
3111 size_t dma_bytes;
3112
3113 if (substream == NULL)
3114 return NOPAGE_OOM;
3115 runtime = substream->runtime;
3116 offset = area->vm_pgoff << PAGE_SHIFT;
3117 offset += address - area->vm_start;
3118 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3119 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3120 if (offset > dma_bytes - PAGE_SIZE)
3121 return NOPAGE_SIGBUS;
3122 if (substream->ops->page) {
3123 page = substream->ops->page(substream, offset);
3124 if (! page)
3125 return NOPAGE_OOM;
3126 } else {
3127 vaddr = runtime->dma_area + offset;
3128 page = virt_to_page(vaddr);
3129 }
3130 get_page(page);
3131 if (type)
3132 *type = VM_FAULT_MINOR;
3133 return page;
3134 }
3135
3136 static struct vm_operations_struct snd_pcm_vm_ops_data =
3137 {
3138 .open = snd_pcm_mmap_data_open,
3139 .close = snd_pcm_mmap_data_close,
3140 .nopage = snd_pcm_mmap_data_nopage,
3141 };
3142
3143 /*
3144 * mmap the DMA buffer on RAM
3145 */
3146 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3147 struct vm_area_struct *area)
3148 {
3149 area->vm_ops = &snd_pcm_vm_ops_data;
3150 area->vm_private_data = substream;
3151 area->vm_flags |= VM_RESERVED;
3152 atomic_inc(&substream->runtime->mmap_count);
3153 return 0;
3154 }
3155
3156 /*
3157 * mmap the DMA buffer on I/O memory area
3158 */
3159 #if SNDRV_PCM_INFO_MMAP_IOMEM
3160 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3161 {
3162 .open = snd_pcm_mmap_data_open,
3163 .close = snd_pcm_mmap_data_close,
3164 };
3165
3166 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3167 struct vm_area_struct *area)
3168 {
3169 long size;
3170 unsigned long offset;
3171
3172 #ifdef pgprot_noncached
3173 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3174 #endif
3175 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3176 area->vm_private_data = substream;
3177 area->vm_flags |= VM_IO;
3178 size = area->vm_end - area->vm_start;
3179 offset = area->vm_pgoff << PAGE_SHIFT;
3180 if (io_remap_pfn_range(area, area->vm_start,
3181 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3182 size, area->vm_page_prot))
3183 return -EAGAIN;
3184 atomic_inc(&substream->runtime->mmap_count);
3185 return 0;
3186 }
3187
3188 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3189 #endif /* SNDRV_PCM_INFO_MMAP */
3190
3191 /*
3192 * mmap DMA buffer
3193 */
3194 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3195 struct vm_area_struct *area)
3196 {
3197 struct snd_pcm_runtime *runtime;
3198 long size;
3199 unsigned long offset;
3200 size_t dma_bytes;
3201
3202 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3203 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3204 return -EINVAL;
3205 } else {
3206 if (!(area->vm_flags & VM_READ))
3207 return -EINVAL;
3208 }
3209 runtime = substream->runtime;
3210 snd_assert(runtime != NULL, return -EAGAIN);
3211 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3212 return -EBADFD;
3213 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3214 return -ENXIO;
3215 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3216 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3217 return -EINVAL;
3218 size = area->vm_end - area->vm_start;
3219 offset = area->vm_pgoff << PAGE_SHIFT;
3220 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3221 if ((size_t)size > dma_bytes)
3222 return -EINVAL;
3223 if (offset > dma_bytes - size)
3224 return -EINVAL;
3225
3226 if (substream->ops->mmap)
3227 return substream->ops->mmap(substream, area);
3228 else
3229 return snd_pcm_default_mmap(substream, area);
3230 }
3231
3232 EXPORT_SYMBOL(snd_pcm_mmap_data);
3233
3234 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3235 {
3236 struct snd_pcm_file * pcm_file;
3237 struct snd_pcm_substream *substream;
3238 unsigned long offset;
3239
3240 pcm_file = file->private_data;
3241 substream = pcm_file->substream;
3242 snd_assert(substream != NULL, return -ENXIO);
3243
3244 offset = area->vm_pgoff << PAGE_SHIFT;
3245 switch (offset) {
3246 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3247 if (substream->no_mmap_ctrl)
3248 return -ENXIO;
3249 return snd_pcm_mmap_status(substream, file, area);
3250 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3251 if (substream->no_mmap_ctrl)
3252 return -ENXIO;
3253 return snd_pcm_mmap_control(substream, file, area);
3254 default:
3255 return snd_pcm_mmap_data(substream, file, area);
3256 }
3257 return 0;
3258 }
3259
3260 static int snd_pcm_fasync(int fd, struct file * file, int on)
3261 {
3262 struct snd_pcm_file * pcm_file;
3263 struct snd_pcm_substream *substream;
3264 struct snd_pcm_runtime *runtime;
3265 int err;
3266
3267 pcm_file = file->private_data;
3268 substream = pcm_file->substream;
3269 snd_assert(substream != NULL, return -ENXIO);
3270 runtime = substream->runtime;
3271
3272 err = fasync_helper(fd, file, on, &runtime->fasync);
3273 if (err < 0)
3274 return err;
3275 return 0;
3276 }
3277
3278 /*
3279 * ioctl32 compat
3280 */
3281 #ifdef CONFIG_COMPAT
3282 #include "pcm_compat.c"
3283 #else
3284 #define snd_pcm_ioctl_compat NULL
3285 #endif
3286
3287 /*
3288 * To be removed helpers to keep binary compatibility
3289 */
3290
3291 #ifdef CONFIG_SND_SUPPORT_OLD_API
3292 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3293 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3294
3295 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3296 struct snd_pcm_hw_params_old *oparams)
3297 {
3298 unsigned int i;
3299
3300 memset(params, 0, sizeof(*params));
3301 params->flags = oparams->flags;
3302 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3303 params->masks[i].bits[0] = oparams->masks[i];
3304 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3305 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3306 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3307 params->info = oparams->info;
3308 params->msbits = oparams->msbits;
3309 params->rate_num = oparams->rate_num;
3310 params->rate_den = oparams->rate_den;
3311 params->fifo_size = oparams->fifo_size;
3312 }
3313
3314 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3315 struct snd_pcm_hw_params *params)
3316 {
3317 unsigned int i;
3318
3319 memset(oparams, 0, sizeof(*oparams));
3320 oparams->flags = params->flags;
3321 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3322 oparams->masks[i] = params->masks[i].bits[0];
3323 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3324 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3325 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3326 oparams->info = params->info;
3327 oparams->msbits = params->msbits;
3328 oparams->rate_num = params->rate_num;
3329 oparams->rate_den = params->rate_den;
3330 oparams->fifo_size = params->fifo_size;
3331 }
3332
3333 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3334 struct snd_pcm_hw_params_old __user * _oparams)
3335 {
3336 struct snd_pcm_hw_params *params;
3337 struct snd_pcm_hw_params_old *oparams = NULL;
3338 int err;
3339
3340 params = kmalloc(sizeof(*params), GFP_KERNEL);
3341 if (!params) {
3342 err = -ENOMEM;
3343 goto out;
3344 }
3345 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3346 if (!oparams) {
3347 err = -ENOMEM;
3348 goto out;
3349 }
3350
3351 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3352 err = -EFAULT;
3353 goto out;
3354 }
3355 snd_pcm_hw_convert_from_old_params(params, oparams);
3356 err = snd_pcm_hw_refine(substream, params);
3357 snd_pcm_hw_convert_to_old_params(oparams, params);
3358 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3359 if (!err)
3360 err = -EFAULT;
3361 }
3362 out:
3363 kfree(params);
3364 kfree(oparams);
3365 return err;
3366 }
3367
3368 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3369 struct snd_pcm_hw_params_old __user * _oparams)
3370 {
3371 struct snd_pcm_hw_params *params;
3372 struct snd_pcm_hw_params_old *oparams = NULL;
3373 int err;
3374
3375 params = kmalloc(sizeof(*params), GFP_KERNEL);
3376 if (!params) {
3377 err = -ENOMEM;
3378 goto out;
3379 }
3380 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3381 if (!oparams) {
3382 err = -ENOMEM;
3383 goto out;
3384 }
3385 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3386 err = -EFAULT;
3387 goto out;
3388 }
3389 snd_pcm_hw_convert_from_old_params(params, oparams);
3390 err = snd_pcm_hw_params(substream, params);
3391 snd_pcm_hw_convert_to_old_params(oparams, params);
3392 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3393 if (!err)
3394 err = -EFAULT;
3395 }
3396 out:
3397 kfree(params);
3398 kfree(oparams);
3399 return err;
3400 }
3401 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3402
3403 /*
3404 * Register section
3405 */
3406
3407 struct file_operations snd_pcm_f_ops[2] = {
3408 {
3409 .owner = THIS_MODULE,
3410 .write = snd_pcm_write,
3411 .writev = snd_pcm_writev,
3412 .open = snd_pcm_playback_open,
3413 .release = snd_pcm_release,
3414 .poll = snd_pcm_playback_poll,
3415 .unlocked_ioctl = snd_pcm_playback_ioctl,
3416 .compat_ioctl = snd_pcm_ioctl_compat,
3417 .mmap = snd_pcm_mmap,
3418 .fasync = snd_pcm_fasync,
3419 },
3420 {
3421 .owner = THIS_MODULE,
3422 .read = snd_pcm_read,
3423 .readv = snd_pcm_readv,
3424 .open = snd_pcm_capture_open,
3425 .release = snd_pcm_release,
3426 .poll = snd_pcm_capture_poll,
3427 .unlocked_ioctl = snd_pcm_capture_ioctl,
3428 .compat_ioctl = snd_pcm_ioctl_compat,
3429 .mmap = snd_pcm_mmap,
3430 .fasync = snd_pcm_fasync,
3431 }
3432 };
Linux kernel - Deliverables
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